diff options
Diffstat (limited to 'drivers/iio')
110 files changed, 15883 insertions, 589 deletions
diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig index fc937aca71fb..b2f963be3993 100644 --- a/drivers/iio/Kconfig +++ b/drivers/iio/Kconfig @@ -20,6 +20,12 @@ config IIO_BUFFER if IIO_BUFFER +config IIO_BUFFER_CB +boolean "IIO callback buffer used for push in-kernel interfaces" + help + Should be selected by any drivers that do-inkernel push + usage. That is, those where the data is pushed to the consumer. + config IIO_KFIFO_BUF select IIO_TRIGGER tristate "Industrial I/O buffering based on kfifo" @@ -57,11 +63,12 @@ config IIO_CONSUMERS_PER_TRIGGER source "drivers/iio/accel/Kconfig" source "drivers/iio/adc/Kconfig" source "drivers/iio/amplifiers/Kconfig" -source "drivers/iio/light/Kconfig" -source "drivers/iio/frequency/Kconfig" -source "drivers/iio/dac/Kconfig" source "drivers/iio/common/Kconfig" +source "drivers/iio/dac/Kconfig" +source "drivers/iio/frequency/Kconfig" source "drivers/iio/gyro/Kconfig" +source "drivers/iio/imu/Kconfig" +source "drivers/iio/light/Kconfig" source "drivers/iio/magnetometer/Kconfig" endif # IIO diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile index 761f2b65ac52..a0e8cdd67e4d 100644 --- a/drivers/iio/Makefile +++ b/drivers/iio/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_IIO) += industrialio.o industrialio-y := industrialio-core.o industrialio-event.o inkern.o industrialio-$(CONFIG_IIO_BUFFER) += industrialio-buffer.o industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o +industrialio-$(CONFIG_IIO_BUFFER_CB) += buffer_cb.o obj-$(CONFIG_IIO_TRIGGERED_BUFFER) += industrialio-triggered-buffer.o obj-$(CONFIG_IIO_KFIFO_BUF) += kfifo_buf.o @@ -13,9 +14,10 @@ obj-$(CONFIG_IIO_KFIFO_BUF) += kfifo_buf.o obj-y += accel/ obj-y += adc/ obj-y += amplifiers/ -obj-y += light/ -obj-y += frequency/ -obj-y += dac/ obj-y += common/ +obj-y += dac/ obj-y += gyro/ +obj-y += frequency/ +obj-y += imu/ +obj-y += light/ obj-y += magnetometer/ diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig index b2510c4d9a5a..bb594963f91e 100644 --- a/drivers/iio/accel/Kconfig +++ b/drivers/iio/accel/Kconfig @@ -8,9 +8,48 @@ config HID_SENSOR_ACCEL_3D select IIO_BUFFER select IIO_TRIGGERED_BUFFER select HID_SENSOR_IIO_COMMON - tristate "HID Acelerometers 3D" + select HID_SENSOR_IIO_TRIGGER + tristate "HID Accelerometers 3D" help Say yes here to build support for the HID SENSOR accelerometers 3D. +config KXSD9 + tristate "Kionix KXSD9 Accelerometer Driver" + depends on SPI + help + Say yes here to build support for the Kionix KXSD9 accelerometer. + Currently this only supports the device via an SPI interface. + +config IIO_ST_ACCEL_3AXIS + tristate "STMicroelectronics accelerometers 3-Axis Driver" + depends on (I2C || SPI_MASTER) && SYSFS + select IIO_ST_SENSORS_CORE + select IIO_ST_ACCEL_I2C_3AXIS if (I2C) + select IIO_ST_ACCEL_SPI_3AXIS if (SPI_MASTER) + select IIO_TRIGGERED_BUFFER if (IIO_BUFFER) + select IIO_ST_ACCEL_BUFFER if (IIO_TRIGGERED_BUFFER) + help + Say yes here to build support for STMicroelectronics accelerometers: + LSM303DLH, LSM303DLHC, LIS3DH, LSM330D, LSM330DL, LSM330DLC, + LIS331DLH, LSM303DL, LSM303DLM, LSM330. + + This driver can also be built as a module. If so, will be created + these modules: + - st_accel (core functions for the driver [it is mandatory]); + - st_accel_i2c (necessary for the I2C devices [optional*]); + - st_accel_spi (necessary for the SPI devices [optional*]); + + (*) one of these is necessary to do something. + +config IIO_ST_ACCEL_I2C_3AXIS + tristate + depends on IIO_ST_ACCEL_3AXIS + depends on IIO_ST_SENSORS_I2C + +config IIO_ST_ACCEL_SPI_3AXIS + tristate + depends on IIO_ST_ACCEL_3AXIS + depends on IIO_ST_SENSORS_SPI + endmenu diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile index 5bc6855a973e..87d8fa264894 100644 --- a/drivers/iio/accel/Makefile +++ b/drivers/iio/accel/Makefile @@ -3,3 +3,12 @@ # obj-$(CONFIG_HID_SENSOR_ACCEL_3D) += hid-sensor-accel-3d.o + +obj-$(CONFIG_IIO_ST_ACCEL_3AXIS) += st_accel.o +st_accel-y := st_accel_core.o +st_accel-$(CONFIG_IIO_BUFFER) += st_accel_buffer.o + +obj-$(CONFIG_IIO_ST_ACCEL_I2C_3AXIS) += st_accel_i2c.o +obj-$(CONFIG_IIO_ST_ACCEL_SPI_3AXIS) += st_accel_spi.o + +obj-$(CONFIG_KXSD9) += kxsd9.o diff --git a/drivers/iio/accel/hid-sensor-accel-3d.c b/drivers/iio/accel/hid-sensor-accel-3d.c index 314a4057879e..dd8ea4284934 100644 --- a/drivers/iio/accel/hid-sensor-accel-3d.c +++ b/drivers/iio/accel/hid-sensor-accel-3d.c @@ -28,7 +28,6 @@ #include <linux/iio/buffer.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> -#include "../common/hid-sensors/hid-sensor-attributes.h" #include "../common/hid-sensors/hid-sensor-trigger.h" /*Format: HID-SENSOR-usage_id_in_hex*/ @@ -44,7 +43,7 @@ enum accel_3d_channel { struct accel_3d_state { struct hid_sensor_hub_callbacks callbacks; - struct hid_sensor_iio_common common_attributes; + struct hid_sensor_common common_attributes; struct hid_sensor_hub_attribute_info accel[ACCEL_3D_CHANNEL_MAX]; u32 accel_val[ACCEL_3D_CHANNEL_MAX]; }; @@ -197,21 +196,8 @@ static const struct iio_info accel_3d_info = { /* Function to push data to buffer */ static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len) { - struct iio_buffer *buffer = indio_dev->buffer; - int datum_sz; - dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n"); - if (!buffer) { - dev_err(&indio_dev->dev, "Buffer == NULL\n"); - return; - } - datum_sz = buffer->access->get_bytes_per_datum(buffer); - if (len > datum_sz) { - dev_err(&indio_dev->dev, "Datum size mismatch %d:%d\n", len, - datum_sz); - return; - } - iio_push_to_buffer(buffer, (u8 *)data); + iio_push_to_buffers(indio_dev, (u8 *)data); } /* Callback handler to send event after all samples are received and captured */ @@ -291,7 +277,7 @@ static int accel_3d_parse_report(struct platform_device *pdev, } /* Function to initialize the processing for usage id */ -static int __devinit hid_accel_3d_probe(struct platform_device *pdev) +static int hid_accel_3d_probe(struct platform_device *pdev) { int ret = 0; static const char *name = "accel_3d"; @@ -319,10 +305,10 @@ static int __devinit hid_accel_3d_probe(struct platform_device *pdev) goto error_free_dev; } - channels = kmemdup(accel_3d_channels, - sizeof(accel_3d_channels), - GFP_KERNEL); + channels = kmemdup(accel_3d_channels, sizeof(accel_3d_channels), + GFP_KERNEL); if (!channels) { + ret = -ENOMEM; dev_err(&pdev->dev, "failed to duplicate channels\n"); goto error_free_dev; } @@ -388,7 +374,7 @@ error_ret: } /* Function to deinitialize the processing for usage id */ -static int __devinit hid_accel_3d_remove(struct platform_device *pdev) +static int hid_accel_3d_remove(struct platform_device *pdev) { struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; struct iio_dev *indio_dev = platform_get_drvdata(pdev); diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c new file mode 100644 index 000000000000..c2229a521ab9 --- /dev/null +++ b/drivers/iio/accel/kxsd9.c @@ -0,0 +1,287 @@ +/* + * kxsd9.c simple support for the Kionix KXSD9 3D + * accelerometer. + * + * Copyright (c) 2008-2009 Jonathan Cameron <jic23@kernel.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * The i2c interface is very similar, so shouldn't be a problem once + * I have a suitable wire made up. + * + * TODO: Support the motion detector + * Uses register address incrementing so could have a + * heavily optimized ring buffer access function. + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/sysfs.h> +#include <linux/slab.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> + +#define KXSD9_REG_X 0x00 +#define KXSD9_REG_Y 0x02 +#define KXSD9_REG_Z 0x04 +#define KXSD9_REG_AUX 0x06 +#define KXSD9_REG_RESET 0x0a +#define KXSD9_REG_CTRL_C 0x0c + +#define KXSD9_FS_MASK 0x03 + +#define KXSD9_REG_CTRL_B 0x0d +#define KXSD9_REG_CTRL_A 0x0e + +#define KXSD9_READ(a) (0x80 | (a)) +#define KXSD9_WRITE(a) (a) + +#define KXSD9_STATE_RX_SIZE 2 +#define KXSD9_STATE_TX_SIZE 2 +/** + * struct kxsd9_state - device related storage + * @buf_lock: protect the rx and tx buffers. + * @us: spi device + * @rx: single rx buffer storage + * @tx: single tx buffer storage + **/ +struct kxsd9_state { + struct mutex buf_lock; + struct spi_device *us; + u8 rx[KXSD9_STATE_RX_SIZE] ____cacheline_aligned; + u8 tx[KXSD9_STATE_TX_SIZE]; +}; + +#define KXSD9_SCALE_2G "0.011978" +#define KXSD9_SCALE_4G "0.023927" +#define KXSD9_SCALE_6G "0.035934" +#define KXSD9_SCALE_8G "0.047853" + +/* reverse order */ +static const int kxsd9_micro_scales[4] = { 47853, 35934, 23927, 11978 }; + +static int kxsd9_write_scale(struct iio_dev *indio_dev, int micro) +{ + int ret, i; + struct kxsd9_state *st = iio_priv(indio_dev); + bool foundit = false; + + for (i = 0; i < 4; i++) + if (micro == kxsd9_micro_scales[i]) { + foundit = true; + break; + } + if (!foundit) + return -EINVAL; + + mutex_lock(&st->buf_lock); + ret = spi_w8r8(st->us, KXSD9_READ(KXSD9_REG_CTRL_C)); + if (ret) + goto error_ret; + st->tx[0] = KXSD9_WRITE(KXSD9_REG_CTRL_C); + st->tx[1] = (ret & ~KXSD9_FS_MASK) | i; + + ret = spi_write(st->us, st->tx, 2); +error_ret: + mutex_unlock(&st->buf_lock); + return ret; +} + +static int kxsd9_read(struct iio_dev *indio_dev, u8 address) +{ + int ret; + struct kxsd9_state *st = iio_priv(indio_dev); + struct spi_transfer xfers[] = { + { + .bits_per_word = 8, + .len = 1, + .delay_usecs = 200, + .tx_buf = st->tx, + }, { + .bits_per_word = 8, + .len = 2, + .rx_buf = st->rx, + }, + }; + + mutex_lock(&st->buf_lock); + st->tx[0] = KXSD9_READ(address); + ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers)); + if (ret) + return ret; + return (((u16)(st->rx[0])) << 8) | (st->rx[1] & 0xF0); +} + +static IIO_CONST_ATTR(accel_scale_available, + KXSD9_SCALE_2G " " + KXSD9_SCALE_4G " " + KXSD9_SCALE_6G " " + KXSD9_SCALE_8G); + +static struct attribute *kxsd9_attributes[] = { + &iio_const_attr_accel_scale_available.dev_attr.attr, + NULL, +}; + +static int kxsd9_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + int ret = -EINVAL; + + if (mask == IIO_CHAN_INFO_SCALE) { + /* Check no integer component */ + if (val) + return -EINVAL; + ret = kxsd9_write_scale(indio_dev, val2); + } + + return ret; +} + +static int kxsd9_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + int ret = -EINVAL; + struct kxsd9_state *st = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = kxsd9_read(indio_dev, chan->address); + if (ret < 0) + goto error_ret; + *val = ret; + break; + case IIO_CHAN_INFO_SCALE: + ret = spi_w8r8(st->us, KXSD9_READ(KXSD9_REG_CTRL_C)); + if (ret) + goto error_ret; + *val2 = kxsd9_micro_scales[ret & KXSD9_FS_MASK]; + ret = IIO_VAL_INT_PLUS_MICRO; + break; + } + +error_ret: + return ret; +}; +#define KXSD9_ACCEL_CHAN(axis) \ + { \ + .type = IIO_ACCEL, \ + .modified = 1, \ + .channel2 = IIO_MOD_##axis, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT, \ + .address = KXSD9_REG_##axis, \ + } + +static const struct iio_chan_spec kxsd9_channels[] = { + KXSD9_ACCEL_CHAN(X), KXSD9_ACCEL_CHAN(Y), KXSD9_ACCEL_CHAN(Z), + { + .type = IIO_VOLTAGE, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, + .indexed = 1, + .address = KXSD9_REG_AUX, + } +}; + +static const struct attribute_group kxsd9_attribute_group = { + .attrs = kxsd9_attributes, +}; + +static int kxsd9_power_up(struct kxsd9_state *st) +{ + int ret; + + st->tx[0] = 0x0d; + st->tx[1] = 0x40; + ret = spi_write(st->us, st->tx, 2); + if (ret) + return ret; + + st->tx[0] = 0x0c; + st->tx[1] = 0x9b; + return spi_write(st->us, st->tx, 2); +}; + +static const struct iio_info kxsd9_info = { + .read_raw = &kxsd9_read_raw, + .write_raw = &kxsd9_write_raw, + .attrs = &kxsd9_attribute_group, + .driver_module = THIS_MODULE, +}; + +static int kxsd9_probe(struct spi_device *spi) +{ + struct iio_dev *indio_dev; + struct kxsd9_state *st; + int ret; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + st = iio_priv(indio_dev); + spi_set_drvdata(spi, indio_dev); + + st->us = spi; + mutex_init(&st->buf_lock); + indio_dev->channels = kxsd9_channels; + indio_dev->num_channels = ARRAY_SIZE(kxsd9_channels); + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->dev.parent = &spi->dev; + indio_dev->info = &kxsd9_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + spi->mode = SPI_MODE_0; + spi_setup(spi); + kxsd9_power_up(st); + + ret = iio_device_register(indio_dev); + if (ret) + goto error_free_dev; + + return 0; + +error_free_dev: + iio_device_free(indio_dev); +error_ret: + return ret; +} + +static int kxsd9_remove(struct spi_device *spi) +{ + iio_device_unregister(spi_get_drvdata(spi)); + iio_device_free(spi_get_drvdata(spi)); + + return 0; +} + +static const struct spi_device_id kxsd9_id[] = { + {"kxsd9", 0}, + { }, +}; +MODULE_DEVICE_TABLE(spi, kxsd9_id); + +static struct spi_driver kxsd9_driver = { + .driver = { + .name = "kxsd9", + .owner = THIS_MODULE, + }, + .probe = kxsd9_probe, + .remove = kxsd9_remove, + .id_table = kxsd9_id, +}; +module_spi_driver(kxsd9_driver); + +MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>"); +MODULE_DESCRIPTION("Kionix KXSD9 SPI driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/accel/st_accel.h b/drivers/iio/accel/st_accel.h new file mode 100644 index 000000000000..37949b94377d --- /dev/null +++ b/drivers/iio/accel/st_accel.h @@ -0,0 +1,47 @@ +/* + * STMicroelectronics accelerometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * v. 1.0.0 + * Licensed under the GPL-2. + */ + +#ifndef ST_ACCEL_H +#define ST_ACCEL_H + +#include <linux/types.h> +#include <linux/iio/common/st_sensors.h> + +#define LSM303DLHC_ACCEL_DEV_NAME "lsm303dlhc_accel" +#define LIS3DH_ACCEL_DEV_NAME "lis3dh" +#define LSM330D_ACCEL_DEV_NAME "lsm330d_accel" +#define LSM330DL_ACCEL_DEV_NAME "lsm330dl_accel" +#define LSM330DLC_ACCEL_DEV_NAME "lsm330dlc_accel" +#define LIS331DLH_ACCEL_DEV_NAME "lis331dlh" +#define LSM303DL_ACCEL_DEV_NAME "lsm303dl_accel" +#define LSM303DLH_ACCEL_DEV_NAME "lsm303dlh_accel" +#define LSM303DLM_ACCEL_DEV_NAME "lsm303dlm_accel" +#define LSM330_ACCEL_DEV_NAME "lsm330_accel" + +int st_accel_common_probe(struct iio_dev *indio_dev); +void st_accel_common_remove(struct iio_dev *indio_dev); + +#ifdef CONFIG_IIO_BUFFER +int st_accel_allocate_ring(struct iio_dev *indio_dev); +void st_accel_deallocate_ring(struct iio_dev *indio_dev); +int st_accel_trig_set_state(struct iio_trigger *trig, bool state); +#define ST_ACCEL_TRIGGER_SET_STATE (&st_accel_trig_set_state) +#else /* CONFIG_IIO_BUFFER */ +static inline int st_accel_allocate_ring(struct iio_dev *indio_dev) +{ + return 0; +} +static inline void st_accel_deallocate_ring(struct iio_dev *indio_dev) +{ +} +#define ST_ACCEL_TRIGGER_SET_STATE NULL +#endif /* CONFIG_IIO_BUFFER */ + +#endif /* ST_ACCEL_H */ diff --git a/drivers/iio/accel/st_accel_buffer.c b/drivers/iio/accel/st_accel_buffer.c new file mode 100644 index 000000000000..6bd82c7f769c --- /dev/null +++ b/drivers/iio/accel/st_accel_buffer.c @@ -0,0 +1,114 @@ +/* + * STMicroelectronics accelerometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/stat.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/delay.h> +#include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#include <linux/iio/common/st_sensors.h> +#include "st_accel.h" + +int st_accel_trig_set_state(struct iio_trigger *trig, bool state) +{ + struct iio_dev *indio_dev = trig->private_data; + + return st_sensors_set_dataready_irq(indio_dev, state); +} + +static int st_accel_buffer_preenable(struct iio_dev *indio_dev) +{ + int err; + + err = st_sensors_set_enable(indio_dev, true); + if (err < 0) + goto st_accel_set_enable_error; + + err = iio_sw_buffer_preenable(indio_dev); + +st_accel_set_enable_error: + return err; +} + +static int st_accel_buffer_postenable(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *adata = iio_priv(indio_dev); + + adata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); + if (adata->buffer_data == NULL) { + err = -ENOMEM; + goto allocate_memory_error; + } + + err = st_sensors_set_axis_enable(indio_dev, + (u8)indio_dev->active_scan_mask[0]); + if (err < 0) + goto st_accel_buffer_postenable_error; + + err = iio_triggered_buffer_postenable(indio_dev); + if (err < 0) + goto st_accel_buffer_postenable_error; + + return err; + +st_accel_buffer_postenable_error: + kfree(adata->buffer_data); +allocate_memory_error: + return err; +} + +static int st_accel_buffer_predisable(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *adata = iio_priv(indio_dev); + + err = iio_triggered_buffer_predisable(indio_dev); + if (err < 0) + goto st_accel_buffer_predisable_error; + + err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS); + if (err < 0) + goto st_accel_buffer_predisable_error; + + err = st_sensors_set_enable(indio_dev, false); + +st_accel_buffer_predisable_error: + kfree(adata->buffer_data); + return err; +} + +static const struct iio_buffer_setup_ops st_accel_buffer_setup_ops = { + .preenable = &st_accel_buffer_preenable, + .postenable = &st_accel_buffer_postenable, + .predisable = &st_accel_buffer_predisable, +}; + +int st_accel_allocate_ring(struct iio_dev *indio_dev) +{ + return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + &st_sensors_trigger_handler, &st_accel_buffer_setup_ops); +} + +void st_accel_deallocate_ring(struct iio_dev *indio_dev) +{ + iio_triggered_buffer_cleanup(indio_dev); +} + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics accelerometers buffer"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c new file mode 100644 index 000000000000..e0f5a3ceba5e --- /dev/null +++ b/drivers/iio/accel/st_accel_core.c @@ -0,0 +1,500 @@ +/* + * STMicroelectronics accelerometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/types.h> +#include <linux/mutex.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/irq.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/trigger.h> +#include <linux/iio/buffer.h> + +#include <linux/iio/common/st_sensors.h> +#include "st_accel.h" + +/* DEFAULT VALUE FOR SENSORS */ +#define ST_ACCEL_DEFAULT_OUT_X_L_ADDR 0x28 +#define ST_ACCEL_DEFAULT_OUT_Y_L_ADDR 0x2a +#define ST_ACCEL_DEFAULT_OUT_Z_L_ADDR 0x2c + +/* FULLSCALE */ +#define ST_ACCEL_FS_AVL_2G 2 +#define ST_ACCEL_FS_AVL_4G 4 +#define ST_ACCEL_FS_AVL_6G 6 +#define ST_ACCEL_FS_AVL_8G 8 +#define ST_ACCEL_FS_AVL_16G 16 + +/* CUSTOM VALUES FOR SENSOR 1 */ +#define ST_ACCEL_1_WAI_EXP 0x33 +#define ST_ACCEL_1_ODR_ADDR 0x20 +#define ST_ACCEL_1_ODR_MASK 0xf0 +#define ST_ACCEL_1_ODR_AVL_1HZ_VAL 0x01 +#define ST_ACCEL_1_ODR_AVL_10HZ_VAL 0x02 +#define ST_ACCEL_1_ODR_AVL_25HZ_VAL 0x03 +#define ST_ACCEL_1_ODR_AVL_50HZ_VAL 0x04 +#define ST_ACCEL_1_ODR_AVL_100HZ_VAL 0x05 +#define ST_ACCEL_1_ODR_AVL_200HZ_VAL 0x06 +#define ST_ACCEL_1_ODR_AVL_400HZ_VAL 0x07 +#define ST_ACCEL_1_ODR_AVL_1600HZ_VAL 0x08 +#define ST_ACCEL_1_FS_ADDR 0x23 +#define ST_ACCEL_1_FS_MASK 0x30 +#define ST_ACCEL_1_FS_AVL_2_VAL 0x00 +#define ST_ACCEL_1_FS_AVL_4_VAL 0x01 +#define ST_ACCEL_1_FS_AVL_8_VAL 0x02 +#define ST_ACCEL_1_FS_AVL_16_VAL 0x03 +#define ST_ACCEL_1_FS_AVL_2_GAIN IIO_G_TO_M_S_2(1000) +#define ST_ACCEL_1_FS_AVL_4_GAIN IIO_G_TO_M_S_2(2000) +#define ST_ACCEL_1_FS_AVL_8_GAIN IIO_G_TO_M_S_2(4000) +#define ST_ACCEL_1_FS_AVL_16_GAIN IIO_G_TO_M_S_2(12000) +#define ST_ACCEL_1_BDU_ADDR 0x23 +#define ST_ACCEL_1_BDU_MASK 0x80 +#define ST_ACCEL_1_DRDY_IRQ_ADDR 0x22 +#define ST_ACCEL_1_DRDY_IRQ_MASK 0x10 +#define ST_ACCEL_1_MULTIREAD_BIT true + +/* CUSTOM VALUES FOR SENSOR 2 */ +#define ST_ACCEL_2_WAI_EXP 0x32 +#define ST_ACCEL_2_ODR_ADDR 0x20 +#define ST_ACCEL_2_ODR_MASK 0x18 +#define ST_ACCEL_2_ODR_AVL_50HZ_VAL 0x00 +#define ST_ACCEL_2_ODR_AVL_100HZ_VAL 0x01 +#define ST_ACCEL_2_ODR_AVL_400HZ_VAL 0x02 +#define ST_ACCEL_2_ODR_AVL_1000HZ_VAL 0x03 +#define ST_ACCEL_2_PW_ADDR 0x20 +#define ST_ACCEL_2_PW_MASK 0xe0 +#define ST_ACCEL_2_FS_ADDR 0x23 +#define ST_ACCEL_2_FS_MASK 0x30 +#define ST_ACCEL_2_FS_AVL_2_VAL 0X00 +#define ST_ACCEL_2_FS_AVL_4_VAL 0X01 +#define ST_ACCEL_2_FS_AVL_8_VAL 0x03 +#define ST_ACCEL_2_FS_AVL_2_GAIN IIO_G_TO_M_S_2(1000) +#define ST_ACCEL_2_FS_AVL_4_GAIN IIO_G_TO_M_S_2(2000) +#define ST_ACCEL_2_FS_AVL_8_GAIN IIO_G_TO_M_S_2(3900) +#define ST_ACCEL_2_BDU_ADDR 0x23 +#define ST_ACCEL_2_BDU_MASK 0x80 +#define ST_ACCEL_2_DRDY_IRQ_ADDR 0x22 +#define ST_ACCEL_2_DRDY_IRQ_MASK 0x02 +#define ST_ACCEL_2_MULTIREAD_BIT true + +/* CUSTOM VALUES FOR SENSOR 3 */ +#define ST_ACCEL_3_WAI_EXP 0x40 +#define ST_ACCEL_3_ODR_ADDR 0x20 +#define ST_ACCEL_3_ODR_MASK 0xf0 +#define ST_ACCEL_3_ODR_AVL_3HZ_VAL 0x01 +#define ST_ACCEL_3_ODR_AVL_6HZ_VAL 0x02 +#define ST_ACCEL_3_ODR_AVL_12HZ_VAL 0x03 +#define ST_ACCEL_3_ODR_AVL_25HZ_VAL 0x04 +#define ST_ACCEL_3_ODR_AVL_50HZ_VAL 0x05 +#define ST_ACCEL_3_ODR_AVL_100HZ_VAL 0x06 +#define ST_ACCEL_3_ODR_AVL_200HZ_VAL 0x07 +#define ST_ACCEL_3_ODR_AVL_400HZ_VAL 0x08 +#define ST_ACCEL_3_ODR_AVL_800HZ_VAL 0x09 +#define ST_ACCEL_3_ODR_AVL_1600HZ_VAL 0x0a +#define ST_ACCEL_3_FS_ADDR 0x24 +#define ST_ACCEL_3_FS_MASK 0x38 +#define ST_ACCEL_3_FS_AVL_2_VAL 0X00 +#define ST_ACCEL_3_FS_AVL_4_VAL 0X01 +#define ST_ACCEL_3_FS_AVL_6_VAL 0x02 +#define ST_ACCEL_3_FS_AVL_8_VAL 0x03 +#define ST_ACCEL_3_FS_AVL_16_VAL 0x04 +#define ST_ACCEL_3_FS_AVL_2_GAIN IIO_G_TO_M_S_2(61) +#define ST_ACCEL_3_FS_AVL_4_GAIN IIO_G_TO_M_S_2(122) +#define ST_ACCEL_3_FS_AVL_6_GAIN IIO_G_TO_M_S_2(183) +#define ST_ACCEL_3_FS_AVL_8_GAIN IIO_G_TO_M_S_2(244) +#define ST_ACCEL_3_FS_AVL_16_GAIN IIO_G_TO_M_S_2(732) +#define ST_ACCEL_3_BDU_ADDR 0x20 +#define ST_ACCEL_3_BDU_MASK 0x08 +#define ST_ACCEL_3_DRDY_IRQ_ADDR 0x23 +#define ST_ACCEL_3_DRDY_IRQ_MASK 0x80 +#define ST_ACCEL_3_IG1_EN_ADDR 0x23 +#define ST_ACCEL_3_IG1_EN_MASK 0x08 +#define ST_ACCEL_3_MULTIREAD_BIT false + +static const struct iio_chan_spec st_accel_12bit_channels[] = { + ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, ST_SENSORS_SCAN_X, IIO_MOD_X, IIO_LE, + ST_SENSORS_DEFAULT_12_REALBITS, ST_ACCEL_DEFAULT_OUT_X_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, ST_SENSORS_SCAN_Y, IIO_MOD_Y, IIO_LE, + ST_SENSORS_DEFAULT_12_REALBITS, ST_ACCEL_DEFAULT_OUT_Y_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, ST_SENSORS_SCAN_Z, IIO_MOD_Z, IIO_LE, + ST_SENSORS_DEFAULT_12_REALBITS, ST_ACCEL_DEFAULT_OUT_Z_L_ADDR), + IIO_CHAN_SOFT_TIMESTAMP(3) +}; + +static const struct iio_chan_spec st_accel_16bit_channels[] = { + ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, ST_SENSORS_SCAN_X, IIO_MOD_X, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_ACCEL_DEFAULT_OUT_X_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, ST_SENSORS_SCAN_Y, IIO_MOD_Y, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_ACCEL_DEFAULT_OUT_Y_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, ST_SENSORS_SCAN_Z, IIO_MOD_Z, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_ACCEL_DEFAULT_OUT_Z_L_ADDR), + IIO_CHAN_SOFT_TIMESTAMP(3) +}; + +static const struct st_sensors st_accel_sensors[] = { + { + .wai = ST_ACCEL_1_WAI_EXP, + .sensors_supported = { + [0] = LIS3DH_ACCEL_DEV_NAME, + [1] = LSM303DLHC_ACCEL_DEV_NAME, + [2] = LSM330D_ACCEL_DEV_NAME, + [3] = LSM330DL_ACCEL_DEV_NAME, + [4] = LSM330DLC_ACCEL_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_accel_12bit_channels, + .odr = { + .addr = ST_ACCEL_1_ODR_ADDR, + .mask = ST_ACCEL_1_ODR_MASK, + .odr_avl = { + { 1, ST_ACCEL_1_ODR_AVL_1HZ_VAL, }, + { 10, ST_ACCEL_1_ODR_AVL_10HZ_VAL, }, + { 25, ST_ACCEL_1_ODR_AVL_25HZ_VAL, }, + { 50, ST_ACCEL_1_ODR_AVL_50HZ_VAL, }, + { 100, ST_ACCEL_1_ODR_AVL_100HZ_VAL, }, + { 200, ST_ACCEL_1_ODR_AVL_200HZ_VAL, }, + { 400, ST_ACCEL_1_ODR_AVL_400HZ_VAL, }, + { 1600, ST_ACCEL_1_ODR_AVL_1600HZ_VAL, }, + }, + }, + .pw = { + .addr = ST_ACCEL_1_ODR_ADDR, + .mask = ST_ACCEL_1_ODR_MASK, + .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, + }, + .enable_axis = { + .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, + .mask = ST_SENSORS_DEFAULT_AXIS_MASK, + }, + .fs = { + .addr = ST_ACCEL_1_FS_ADDR, + .mask = ST_ACCEL_1_FS_MASK, + .fs_avl = { + [0] = { + .num = ST_ACCEL_FS_AVL_2G, + .value = ST_ACCEL_1_FS_AVL_2_VAL, + .gain = ST_ACCEL_1_FS_AVL_2_GAIN, + }, + [1] = { + .num = ST_ACCEL_FS_AVL_4G, + .value = ST_ACCEL_1_FS_AVL_4_VAL, + .gain = ST_ACCEL_1_FS_AVL_4_GAIN, + }, + [2] = { + .num = ST_ACCEL_FS_AVL_8G, + .value = ST_ACCEL_1_FS_AVL_8_VAL, + .gain = ST_ACCEL_1_FS_AVL_8_GAIN, + }, + [3] = { + .num = ST_ACCEL_FS_AVL_16G, + .value = ST_ACCEL_1_FS_AVL_16_VAL, + .gain = ST_ACCEL_1_FS_AVL_16_GAIN, + }, + }, + }, + .bdu = { + .addr = ST_ACCEL_1_BDU_ADDR, + .mask = ST_ACCEL_1_BDU_MASK, + }, + .drdy_irq = { + .addr = ST_ACCEL_1_DRDY_IRQ_ADDR, + .mask = ST_ACCEL_1_DRDY_IRQ_MASK, + }, + .multi_read_bit = ST_ACCEL_1_MULTIREAD_BIT, + .bootime = 2, + }, + { + .wai = ST_ACCEL_2_WAI_EXP, + .sensors_supported = { + [0] = LIS331DLH_ACCEL_DEV_NAME, + [1] = LSM303DL_ACCEL_DEV_NAME, + [2] = LSM303DLH_ACCEL_DEV_NAME, + [3] = LSM303DLM_ACCEL_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_accel_12bit_channels, + .odr = { + .addr = ST_ACCEL_2_ODR_ADDR, + .mask = ST_ACCEL_2_ODR_MASK, + .odr_avl = { + { 50, ST_ACCEL_2_ODR_AVL_50HZ_VAL, }, + { 100, ST_ACCEL_2_ODR_AVL_100HZ_VAL, }, + { 400, ST_ACCEL_2_ODR_AVL_400HZ_VAL, }, + { 1000, ST_ACCEL_2_ODR_AVL_1000HZ_VAL, }, + }, + }, + .pw = { + .addr = ST_ACCEL_2_PW_ADDR, + .mask = ST_ACCEL_2_PW_MASK, + .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, + .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, + }, + .enable_axis = { + .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, + .mask = ST_SENSORS_DEFAULT_AXIS_MASK, + }, + .fs = { + .addr = ST_ACCEL_2_FS_ADDR, + .mask = ST_ACCEL_2_FS_MASK, + .fs_avl = { + [0] = { + .num = ST_ACCEL_FS_AVL_2G, + .value = ST_ACCEL_2_FS_AVL_2_VAL, + .gain = ST_ACCEL_2_FS_AVL_2_GAIN, + }, + [1] = { + .num = ST_ACCEL_FS_AVL_4G, + .value = ST_ACCEL_2_FS_AVL_4_VAL, + .gain = ST_ACCEL_2_FS_AVL_4_GAIN, + }, + [2] = { + .num = ST_ACCEL_FS_AVL_8G, + .value = ST_ACCEL_2_FS_AVL_8_VAL, + .gain = ST_ACCEL_2_FS_AVL_8_GAIN, + }, + }, + }, + .bdu = { + .addr = ST_ACCEL_2_BDU_ADDR, + .mask = ST_ACCEL_2_BDU_MASK, + }, + .drdy_irq = { + .addr = ST_ACCEL_2_DRDY_IRQ_ADDR, + .mask = ST_ACCEL_2_DRDY_IRQ_MASK, + }, + .multi_read_bit = ST_ACCEL_2_MULTIREAD_BIT, + .bootime = 2, + }, + { + .wai = ST_ACCEL_3_WAI_EXP, + .sensors_supported = { + [0] = LSM330_ACCEL_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_accel_16bit_channels, + .odr = { + .addr = ST_ACCEL_3_ODR_ADDR, + .mask = ST_ACCEL_3_ODR_MASK, + .odr_avl = { + { 3, ST_ACCEL_3_ODR_AVL_3HZ_VAL }, + { 6, ST_ACCEL_3_ODR_AVL_6HZ_VAL, }, + { 12, ST_ACCEL_3_ODR_AVL_12HZ_VAL, }, + { 25, ST_ACCEL_3_ODR_AVL_25HZ_VAL, }, + { 50, ST_ACCEL_3_ODR_AVL_50HZ_VAL, }, + { 100, ST_ACCEL_3_ODR_AVL_100HZ_VAL, }, + { 200, ST_ACCEL_3_ODR_AVL_200HZ_VAL, }, + { 400, ST_ACCEL_3_ODR_AVL_400HZ_VAL, }, + { 800, ST_ACCEL_3_ODR_AVL_800HZ_VAL, }, + { 1600, ST_ACCEL_3_ODR_AVL_1600HZ_VAL, }, + }, + }, + .pw = { + .addr = ST_ACCEL_3_ODR_ADDR, + .mask = ST_ACCEL_3_ODR_MASK, + .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, + }, + .enable_axis = { + .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, + .mask = ST_SENSORS_DEFAULT_AXIS_MASK, + }, + .fs = { + .addr = ST_ACCEL_3_FS_ADDR, + .mask = ST_ACCEL_3_FS_MASK, + .fs_avl = { + [0] = { + .num = ST_ACCEL_FS_AVL_2G, + .value = ST_ACCEL_3_FS_AVL_2_VAL, + .gain = ST_ACCEL_3_FS_AVL_2_GAIN, + }, + [1] = { + .num = ST_ACCEL_FS_AVL_4G, + .value = ST_ACCEL_3_FS_AVL_4_VAL, + .gain = ST_ACCEL_3_FS_AVL_4_GAIN, + }, + [2] = { + .num = ST_ACCEL_FS_AVL_6G, + .value = ST_ACCEL_3_FS_AVL_6_VAL, + .gain = ST_ACCEL_3_FS_AVL_6_GAIN, + }, + [3] = { + .num = ST_ACCEL_FS_AVL_8G, + .value = ST_ACCEL_3_FS_AVL_8_VAL, + .gain = ST_ACCEL_3_FS_AVL_8_GAIN, + }, + [4] = { + .num = ST_ACCEL_FS_AVL_16G, + .value = ST_ACCEL_3_FS_AVL_16_VAL, + .gain = ST_ACCEL_3_FS_AVL_16_GAIN, + }, + }, + }, + .bdu = { + .addr = ST_ACCEL_3_BDU_ADDR, + .mask = ST_ACCEL_3_BDU_MASK, + }, + .drdy_irq = { + .addr = ST_ACCEL_3_DRDY_IRQ_ADDR, + .mask = ST_ACCEL_3_DRDY_IRQ_MASK, + .ig1 = { + .en_addr = ST_ACCEL_3_IG1_EN_ADDR, + .en_mask = ST_ACCEL_3_IG1_EN_MASK, + }, + }, + .multi_read_bit = ST_ACCEL_3_MULTIREAD_BIT, + .bootime = 2, + }, +}; + +static int st_accel_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *ch, int *val, + int *val2, long mask) +{ + int err; + struct st_sensor_data *adata = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + err = st_sensors_read_info_raw(indio_dev, ch, val); + if (err < 0) + goto read_error; + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = 0; + *val2 = adata->current_fullscale->gain; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + +read_error: + return err; +} + +static int st_accel_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long mask) +{ + int err; + + switch (mask) { + case IIO_CHAN_INFO_SCALE: + err = st_sensors_set_fullscale_by_gain(indio_dev, val2); + break; + default: + return -EINVAL; + } + + return err; +} + +static ST_SENSOR_DEV_ATTR_SAMP_FREQ(); +static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL(); +static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available); + +static struct attribute *st_accel_attributes[] = { + &iio_dev_attr_sampling_frequency_available.dev_attr.attr, + &iio_dev_attr_in_accel_scale_available.dev_attr.attr, + &iio_dev_attr_sampling_frequency.dev_attr.attr, + NULL, +}; + +static const struct attribute_group st_accel_attribute_group = { + .attrs = st_accel_attributes, +}; + +static const struct iio_info accel_info = { + .driver_module = THIS_MODULE, + .attrs = &st_accel_attribute_group, + .read_raw = &st_accel_read_raw, + .write_raw = &st_accel_write_raw, +}; + +#ifdef CONFIG_IIO_TRIGGER +static const struct iio_trigger_ops st_accel_trigger_ops = { + .owner = THIS_MODULE, + .set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE, +}; +#define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops) +#else +#define ST_ACCEL_TRIGGER_OPS NULL +#endif + +int st_accel_common_probe(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *adata = iio_priv(indio_dev); + + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &accel_info; + + err = st_sensors_check_device_support(indio_dev, + ARRAY_SIZE(st_accel_sensors), st_accel_sensors); + if (err < 0) + goto st_accel_common_probe_error; + + adata->multiread_bit = adata->sensor->multi_read_bit; + indio_dev->channels = adata->sensor->ch; + indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; + + adata->current_fullscale = (struct st_sensor_fullscale_avl *) + &adata->sensor->fs.fs_avl[0]; + adata->odr = adata->sensor->odr.odr_avl[0].hz; + + err = st_sensors_init_sensor(indio_dev); + if (err < 0) + goto st_accel_common_probe_error; + + if (adata->get_irq_data_ready(indio_dev) > 0) { + err = st_accel_allocate_ring(indio_dev); + if (err < 0) + goto st_accel_common_probe_error; + + err = st_sensors_allocate_trigger(indio_dev, + ST_ACCEL_TRIGGER_OPS); + if (err < 0) + goto st_accel_probe_trigger_error; + } + + err = iio_device_register(indio_dev); + if (err) + goto st_accel_device_register_error; + + return err; + +st_accel_device_register_error: + if (adata->get_irq_data_ready(indio_dev) > 0) + st_sensors_deallocate_trigger(indio_dev); +st_accel_probe_trigger_error: + if (adata->get_irq_data_ready(indio_dev) > 0) + st_accel_deallocate_ring(indio_dev); +st_accel_common_probe_error: + return err; +} +EXPORT_SYMBOL(st_accel_common_probe); + +void st_accel_common_remove(struct iio_dev *indio_dev) +{ + struct st_sensor_data *adata = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + if (adata->get_irq_data_ready(indio_dev) > 0) { + st_sensors_deallocate_trigger(indio_dev); + st_accel_deallocate_ring(indio_dev); + } + iio_device_free(indio_dev); +} +EXPORT_SYMBOL(st_accel_common_remove); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics accelerometers driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/accel/st_accel_i2c.c b/drivers/iio/accel/st_accel_i2c.c new file mode 100644 index 000000000000..ffc9d097e484 --- /dev/null +++ b/drivers/iio/accel/st_accel_i2c.c @@ -0,0 +1,86 @@ +/* + * STMicroelectronics accelerometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/iio/iio.h> + +#include <linux/iio/common/st_sensors.h> +#include <linux/iio/common/st_sensors_i2c.h> +#include "st_accel.h" + +static int st_accel_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct iio_dev *indio_dev; + struct st_sensor_data *adata; + int err; + + indio_dev = iio_device_alloc(sizeof(*adata)); + if (indio_dev == NULL) { + err = -ENOMEM; + goto iio_device_alloc_error; + } + + adata = iio_priv(indio_dev); + adata->dev = &client->dev; + + st_sensors_i2c_configure(indio_dev, client, adata); + + err = st_accel_common_probe(indio_dev); + if (err < 0) + goto st_accel_common_probe_error; + + return 0; + +st_accel_common_probe_error: + iio_device_free(indio_dev); +iio_device_alloc_error: + return err; +} + +static int st_accel_i2c_remove(struct i2c_client *client) +{ + st_accel_common_remove(i2c_get_clientdata(client)); + + return 0; +} + +static const struct i2c_device_id st_accel_id_table[] = { + { LSM303DLH_ACCEL_DEV_NAME }, + { LSM303DLHC_ACCEL_DEV_NAME }, + { LIS3DH_ACCEL_DEV_NAME }, + { LSM330D_ACCEL_DEV_NAME }, + { LSM330DL_ACCEL_DEV_NAME }, + { LSM330DLC_ACCEL_DEV_NAME }, + { LIS331DLH_ACCEL_DEV_NAME }, + { LSM303DL_ACCEL_DEV_NAME }, + { LSM303DLM_ACCEL_DEV_NAME }, + { LSM330_ACCEL_DEV_NAME }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, st_accel_id_table); + +static struct i2c_driver st_accel_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "st-accel-i2c", + }, + .probe = st_accel_i2c_probe, + .remove = st_accel_i2c_remove, + .id_table = st_accel_id_table, +}; +module_i2c_driver(st_accel_driver); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics accelerometers i2c driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/accel/st_accel_spi.c b/drivers/iio/accel/st_accel_spi.c new file mode 100644 index 000000000000..22b35bfea7d2 --- /dev/null +++ b/drivers/iio/accel/st_accel_spi.c @@ -0,0 +1,85 @@ +/* + * STMicroelectronics accelerometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/spi/spi.h> +#include <linux/iio/iio.h> + +#include <linux/iio/common/st_sensors.h> +#include <linux/iio/common/st_sensors_spi.h> +#include "st_accel.h" + +static int st_accel_spi_probe(struct spi_device *spi) +{ + struct iio_dev *indio_dev; + struct st_sensor_data *adata; + int err; + + indio_dev = iio_device_alloc(sizeof(*adata)); + if (indio_dev == NULL) { + err = -ENOMEM; + goto iio_device_alloc_error; + } + + adata = iio_priv(indio_dev); + adata->dev = &spi->dev; + + st_sensors_spi_configure(indio_dev, spi, adata); + + err = st_accel_common_probe(indio_dev); + if (err < 0) + goto st_accel_common_probe_error; + + return 0; + +st_accel_common_probe_error: + iio_device_free(indio_dev); +iio_device_alloc_error: + return err; +} + +static int st_accel_spi_remove(struct spi_device *spi) +{ + st_accel_common_remove(spi_get_drvdata(spi)); + + return 0; +} + +static const struct spi_device_id st_accel_id_table[] = { + { LSM303DLH_ACCEL_DEV_NAME }, + { LSM303DLHC_ACCEL_DEV_NAME }, + { LIS3DH_ACCEL_DEV_NAME }, + { LSM330D_ACCEL_DEV_NAME }, + { LSM330DL_ACCEL_DEV_NAME }, + { LSM330DLC_ACCEL_DEV_NAME }, + { LIS331DLH_ACCEL_DEV_NAME }, + { LSM303DL_ACCEL_DEV_NAME }, + { LSM303DLM_ACCEL_DEV_NAME }, + { LSM330_ACCEL_DEV_NAME }, + {}, +}; +MODULE_DEVICE_TABLE(spi, st_accel_id_table); + +static struct spi_driver st_accel_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "st-accel-spi", + }, + .probe = st_accel_spi_probe, + .remove = st_accel_spi_remove, + .id_table = st_accel_id_table, +}; +module_spi_driver(st_accel_driver); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics accelerometers spi driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 492758120338..e372257a8494 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -18,6 +18,18 @@ config AD7266 Say yes here to build support for Analog Devices AD7265 and AD7266 ADCs. +config AD7298 + tristate "Analog Devices AD7298 ADC driver" + depends on SPI + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + Say yes here to build support for Analog Devices AD7298 + 8 Channel ADC with temperature sensor. + + To compile this driver as a module, choose M here: the + module will be called ad7298. + config AD7791 tristate "Analog Devices AD7791 ADC driver" depends on SPI @@ -30,6 +42,18 @@ config AD7791 To compile this driver as a module, choose M here: the module will be called ad7791. +config AD7793 + tristate "Analog Devices AD7793 and similar ADCs driver" + depends on SPI + select AD_SIGMA_DELTA + help + Say yes here to build support for Analog Devices AD7785, AD7792, AD7793, + AD7794 and AD7795 SPI analog to digital converters (ADC). + If unsure, say N (but it's safe to say "Y"). + + To compile this driver as a module, choose M here: the + module will be called AD7793. + config AD7476 tristate "Analog Devices AD7476 and similar 1-channel ADCs driver" depends on SPI @@ -45,6 +69,19 @@ config AD7476 To compile this driver as a module, choose M here: the module will be called ad7476. +config AD7887 + tristate "Analog Devices AD7887 ADC driver" + depends on SPI + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + Say yes here to build support for Analog Devices + AD7887 SPI analog to digital converter (ADC). + If unsure, say N (but it's safe to say "Y"). + + To compile this driver as a module, choose M here: the + module will be called ad7887. + config AT91_ADC tristate "Atmel AT91 ADC" depends on ARCH_AT91 @@ -60,4 +97,44 @@ config LP8788_ADC help Say yes here to build support for TI LP8788 ADC. +config MAX1363 + tristate "Maxim max1363 ADC driver" + depends on I2C + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + Say yes here to build support for many Maxim i2c analog to digital + converters (ADC). (max1361, max1362, max1363, max1364, max1036, + max1037, max1038, max1039, max1136, max1136, max1137, max1138, + max1139, max1236, max1237, max11238, max1239, max11600, max11601, + max11602, max11603, max11604, max11605, max11606, max11607, + max11608, max11609, max11610, max11611, max11612, max11613, + max11614, max11615, max11616, max11617, max11644, max11645, + max11646, max11647) Provides direct access via sysfs and buffered + data via the iio dev interface. + +config TI_ADC081C + tristate "Texas Instruments ADC081C021/027" + depends on I2C + help + If you say yes here you get support for Texas Instruments ADC081C021 + and ADC081C027 ADC chips. + + This driver can also be built as a module. If so, the module will be + called ti-adc081c. + +config TI_AM335X_ADC + tristate "TI's ADC driver" + depends on MFD_TI_AM335X_TSCADC + help + Say yes here to build support for Texas Instruments ADC + driver which is also a MFD client. + +config VIPERBOARD_ADC + tristate "Viperboard ADC support" + depends on MFD_VIPERBOARD && USB + help + Say yes here to access the ADC part of the Nano River + Technologies Viperboard. + endmenu diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 900995d5e179..2d5f10080d8d 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -4,7 +4,14 @@ obj-$(CONFIG_AD_SIGMA_DELTA) += ad_sigma_delta.o obj-$(CONFIG_AD7266) += ad7266.o +obj-$(CONFIG_AD7298) += ad7298.o obj-$(CONFIG_AD7476) += ad7476.o obj-$(CONFIG_AD7791) += ad7791.o +obj-$(CONFIG_AD7793) += ad7793.o +obj-$(CONFIG_AD7887) += ad7887.o obj-$(CONFIG_AT91_ADC) += at91_adc.o obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o +obj-$(CONFIG_MAX1363) += max1363.o +obj-$(CONFIG_TI_ADC081C) += ti-adc081c.o +obj-$(CONFIG_TI_AM335X_ADC) += ti_am335x_adc.o +obj-$(CONFIG_VIPERBOARD_ADC) += viperboard_adc.o diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c index b11f214779a2..bbad9b94cd75 100644 --- a/drivers/iio/adc/ad7266.c +++ b/drivers/iio/adc/ad7266.c @@ -91,7 +91,6 @@ static irqreturn_t ad7266_trigger_handler(int irq, void *p) { struct iio_poll_func *pf = p; struct iio_dev *indio_dev = pf->indio_dev; - struct iio_buffer *buffer = indio_dev->buffer; struct ad7266_state *st = iio_priv(indio_dev); int ret; @@ -99,7 +98,7 @@ static irqreturn_t ad7266_trigger_handler(int irq, void *p) if (ret == 0) { if (indio_dev->scan_timestamp) ((s64 *)st->data)[1] = pf->timestamp; - iio_push_to_buffer(buffer, (u8 *)st->data); + iio_push_to_buffers(indio_dev, (u8 *)st->data); } iio_trigger_notify_done(indio_dev->trig); @@ -368,7 +367,7 @@ static const struct ad7266_chan_info ad7266_chan_infos[] = { }, }; -static void __devinit ad7266_init_channels(struct iio_dev *indio_dev) +static void ad7266_init_channels(struct iio_dev *indio_dev) { struct ad7266_state *st = iio_priv(indio_dev); bool is_differential, is_signed; @@ -392,7 +391,7 @@ static const char * const ad7266_gpio_labels[] = { "AD0", "AD1", "AD2", }; -static int __devinit ad7266_probe(struct spi_device *spi) +static int ad7266_probe(struct spi_device *spi) { struct ad7266_platform_data *pdata = spi->dev.platform_data; struct iio_dev *indio_dev; @@ -412,7 +411,11 @@ static int __devinit ad7266_probe(struct spi_device *spi) if (ret) goto error_put_reg; - st->vref_uv = regulator_get_voltage(st->reg); + ret = regulator_get_voltage(st->reg); + if (ret < 0) + goto error_disable_reg; + + st->vref_uv = ret; } else { /* Use internal reference */ st->vref_uv = 2500000; @@ -495,7 +498,7 @@ error_put_reg: return ret; } -static int __devexit ad7266_remove(struct spi_device *spi) +static int ad7266_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad7266_state *st = iio_priv(indio_dev); @@ -526,7 +529,7 @@ static struct spi_driver ad7266_driver = { .owner = THIS_MODULE, }, .probe = ad7266_probe, - .remove = __devexit_p(ad7266_remove), + .remove = ad7266_remove, .id_table = ad7266_id, }; module_spi_driver(ad7266_driver); diff --git a/drivers/iio/adc/ad7298.c b/drivers/iio/adc/ad7298.c new file mode 100644 index 000000000000..b34d754994d5 --- /dev/null +++ b/drivers/iio/adc/ad7298.c @@ -0,0 +1,408 @@ +/* + * AD7298 SPI ADC driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/spi/spi.h> +#include <linux/regulator/consumer.h> +#include <linux/err.h> +#include <linux/delay.h> +#include <linux/module.h> +#include <linux/interrupt.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#include <linux/platform_data/ad7298.h> + +#define AD7298_WRITE (1 << 15) /* write to the control register */ +#define AD7298_REPEAT (1 << 14) /* repeated conversion enable */ +#define AD7298_CH(x) (1 << (13 - (x))) /* channel select */ +#define AD7298_TSENSE (1 << 5) /* temperature conversion enable */ +#define AD7298_EXTREF (1 << 2) /* external reference enable */ +#define AD7298_TAVG (1 << 1) /* temperature sensor averaging enable */ +#define AD7298_PDD (1 << 0) /* partial power down enable */ + +#define AD7298_MAX_CHAN 8 +#define AD7298_BITS 12 +#define AD7298_STORAGE_BITS 16 +#define AD7298_INTREF_mV 2500 + +#define AD7298_CH_TEMP 9 + +#define RES_MASK(bits) ((1 << (bits)) - 1) + +struct ad7298_state { + struct spi_device *spi; + struct regulator *reg; + unsigned ext_ref; + struct spi_transfer ring_xfer[10]; + struct spi_transfer scan_single_xfer[3]; + struct spi_message ring_msg; + struct spi_message scan_single_msg; + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + __be16 rx_buf[12] ____cacheline_aligned; + __be16 tx_buf[2]; +}; + +#define AD7298_V_CHAN(index) \ + { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .channel = index, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT, \ + .address = index, \ + .scan_index = index, \ + .scan_type = { \ + .sign = 'u', \ + .realbits = 12, \ + .storagebits = 16, \ + .endianness = IIO_BE, \ + }, \ + } + +static const struct iio_chan_spec ad7298_channels[] = { + { + .type = IIO_TEMP, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT, + .address = AD7298_CH_TEMP, + .scan_index = -1, + .scan_type = { + .sign = 's', + .realbits = 32, + .storagebits = 32, + }, + }, + AD7298_V_CHAN(0), + AD7298_V_CHAN(1), + AD7298_V_CHAN(2), + AD7298_V_CHAN(3), + AD7298_V_CHAN(4), + AD7298_V_CHAN(5), + AD7298_V_CHAN(6), + AD7298_V_CHAN(7), + IIO_CHAN_SOFT_TIMESTAMP(8), +}; + +/** + * ad7298_update_scan_mode() setup the spi transfer buffer for the new scan mask + **/ +static int ad7298_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *active_scan_mask) +{ + struct ad7298_state *st = iio_priv(indio_dev); + int i, m; + unsigned short command; + int scan_count; + + /* Now compute overall size */ + scan_count = bitmap_weight(active_scan_mask, indio_dev->masklength); + + command = AD7298_WRITE | st->ext_ref; + + for (i = 0, m = AD7298_CH(0); i < AD7298_MAX_CHAN; i++, m >>= 1) + if (test_bit(i, active_scan_mask)) + command |= m; + + st->tx_buf[0] = cpu_to_be16(command); + + /* build spi ring message */ + st->ring_xfer[0].tx_buf = &st->tx_buf[0]; + st->ring_xfer[0].len = 2; + st->ring_xfer[0].cs_change = 1; + st->ring_xfer[1].tx_buf = &st->tx_buf[1]; + st->ring_xfer[1].len = 2; + st->ring_xfer[1].cs_change = 1; + + spi_message_init(&st->ring_msg); + spi_message_add_tail(&st->ring_xfer[0], &st->ring_msg); + spi_message_add_tail(&st->ring_xfer[1], &st->ring_msg); + + for (i = 0; i < scan_count; i++) { + st->ring_xfer[i + 2].rx_buf = &st->rx_buf[i]; + st->ring_xfer[i + 2].len = 2; + st->ring_xfer[i + 2].cs_change = 1; + spi_message_add_tail(&st->ring_xfer[i + 2], &st->ring_msg); + } + /* make sure last transfer cs_change is not set */ + st->ring_xfer[i + 1].cs_change = 0; + + return 0; +} + +/** + * ad7298_trigger_handler() bh of trigger launched polling to ring buffer + * + * Currently there is no option in this driver to disable the saving of + * timestamps within the ring. + **/ +static irqreturn_t ad7298_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct ad7298_state *st = iio_priv(indio_dev); + s64 time_ns = 0; + int b_sent; + + b_sent = spi_sync(st->spi, &st->ring_msg); + if (b_sent) + goto done; + + if (indio_dev->scan_timestamp) { + time_ns = iio_get_time_ns(); + memcpy((u8 *)st->rx_buf + indio_dev->scan_bytes - sizeof(s64), + &time_ns, sizeof(time_ns)); + } + + iio_push_to_buffers(indio_dev, (u8 *)st->rx_buf); + +done: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static int ad7298_scan_direct(struct ad7298_state *st, unsigned ch) +{ + int ret; + st->tx_buf[0] = cpu_to_be16(AD7298_WRITE | st->ext_ref | + (AD7298_CH(0) >> ch)); + + ret = spi_sync(st->spi, &st->scan_single_msg); + if (ret) + return ret; + + return be16_to_cpu(st->rx_buf[0]); +} + +static int ad7298_scan_temp(struct ad7298_state *st, int *val) +{ + int ret; + __be16 buf; + + buf = cpu_to_be16(AD7298_WRITE | AD7298_TSENSE | + AD7298_TAVG | st->ext_ref); + + ret = spi_write(st->spi, (u8 *)&buf, 2); + if (ret) + return ret; + + buf = cpu_to_be16(0); + + ret = spi_write(st->spi, (u8 *)&buf, 2); + if (ret) + return ret; + + usleep_range(101, 1000); /* sleep > 100us */ + + ret = spi_read(st->spi, (u8 *)&buf, 2); + if (ret) + return ret; + + *val = sign_extend32(be16_to_cpu(buf), 11); + + return 0; +} + +static int ad7298_get_ref_voltage(struct ad7298_state *st) +{ + int vref; + + if (st->ext_ref) { + vref = regulator_get_voltage(st->reg); + if (vref < 0) + return vref; + + return vref / 1000; + } else { + return AD7298_INTREF_mV; + } +} + +static int ad7298_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + int ret; + struct ad7298_state *st = iio_priv(indio_dev); + + switch (m) { + case IIO_CHAN_INFO_RAW: + mutex_lock(&indio_dev->mlock); + if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) { + ret = -EBUSY; + } else { + if (chan->address == AD7298_CH_TEMP) + ret = ad7298_scan_temp(st, val); + else + ret = ad7298_scan_direct(st, chan->address); + } + mutex_unlock(&indio_dev->mlock); + + if (ret < 0) + return ret; + + if (chan->address != AD7298_CH_TEMP) + *val = ret & RES_MASK(AD7298_BITS); + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_VOLTAGE: + *val = ad7298_get_ref_voltage(st); + *val2 = chan->scan_type.realbits; + return IIO_VAL_FRACTIONAL_LOG2; + case IIO_TEMP: + *val = ad7298_get_ref_voltage(st); + *val2 = 10; + return IIO_VAL_FRACTIONAL; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_OFFSET: + *val = 1093 - 2732500 / ad7298_get_ref_voltage(st); + return IIO_VAL_INT; + } + return -EINVAL; +} + +static const struct iio_info ad7298_info = { + .read_raw = &ad7298_read_raw, + .update_scan_mode = ad7298_update_scan_mode, + .driver_module = THIS_MODULE, +}; + +static int ad7298_probe(struct spi_device *spi) +{ + struct ad7298_platform_data *pdata = spi->dev.platform_data; + struct ad7298_state *st; + struct iio_dev *indio_dev = iio_device_alloc(sizeof(*st)); + int ret; + + if (indio_dev == NULL) + return -ENOMEM; + + st = iio_priv(indio_dev); + + if (pdata && pdata->ext_ref) + st->ext_ref = AD7298_EXTREF; + + if (st->ext_ref) { + st->reg = regulator_get(&spi->dev, "vref"); + if (IS_ERR(st->reg)) { + ret = PTR_ERR(st->reg); + goto error_free; + } + ret = regulator_enable(st->reg); + if (ret) + goto error_put_reg; + } + + spi_set_drvdata(spi, indio_dev); + + st->spi = spi; + + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->dev.parent = &spi->dev; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = ad7298_channels; + indio_dev->num_channels = ARRAY_SIZE(ad7298_channels); + indio_dev->info = &ad7298_info; + + /* Setup default message */ + + st->scan_single_xfer[0].tx_buf = &st->tx_buf[0]; + st->scan_single_xfer[0].len = 2; + st->scan_single_xfer[0].cs_change = 1; + st->scan_single_xfer[1].tx_buf = &st->tx_buf[1]; + st->scan_single_xfer[1].len = 2; + st->scan_single_xfer[1].cs_change = 1; + st->scan_single_xfer[2].rx_buf = &st->rx_buf[0]; + st->scan_single_xfer[2].len = 2; + + spi_message_init(&st->scan_single_msg); + spi_message_add_tail(&st->scan_single_xfer[0], &st->scan_single_msg); + spi_message_add_tail(&st->scan_single_xfer[1], &st->scan_single_msg); + spi_message_add_tail(&st->scan_single_xfer[2], &st->scan_single_msg); + + ret = iio_triggered_buffer_setup(indio_dev, NULL, + &ad7298_trigger_handler, NULL); + if (ret) + goto error_disable_reg; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_cleanup_ring; + + return 0; + +error_cleanup_ring: + iio_triggered_buffer_cleanup(indio_dev); +error_disable_reg: + if (st->ext_ref) + regulator_disable(st->reg); +error_put_reg: + if (st->ext_ref) + regulator_put(st->reg); +error_free: + iio_device_free(indio_dev); + + return ret; +} + +static int ad7298_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad7298_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + if (st->ext_ref) { + regulator_disable(st->reg); + regulator_put(st->reg); + } + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad7298_id[] = { + {"ad7298", 0}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad7298_id); + +static struct spi_driver ad7298_driver = { + .driver = { + .name = "ad7298", + .owner = THIS_MODULE, + }, + .probe = ad7298_probe, + .remove = ad7298_remove, + .id_table = ad7298_id, +}; +module_spi_driver(ad7298_driver); + +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("Analog Devices AD7298 ADC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/adc/ad7476.c b/drivers/iio/adc/ad7476.c index 7f2f45a0a48d..1491fa6debb2 100644 --- a/drivers/iio/adc/ad7476.c +++ b/drivers/iio/adc/ad7476.c @@ -76,7 +76,7 @@ static irqreturn_t ad7476_trigger_handler(int irq, void *p) if (indio_dev->scan_timestamp) ((s64 *)st->data)[1] = time_ns; - iio_push_to_buffer(indio_dev->buffer, st->data); + iio_push_to_buffers(indio_dev, st->data); done: iio_trigger_notify_done(indio_dev->trig); @@ -207,7 +207,7 @@ static const struct iio_info ad7476_info = { .read_raw = &ad7476_read_raw, }; -static int __devinit ad7476_probe(struct spi_device *spi) +static int ad7476_probe(struct spi_device *spi) { struct ad7476_state *st; struct iio_dev *indio_dev; @@ -277,7 +277,7 @@ error_ret: return ret; } -static int __devexit ad7476_remove(struct spi_device *spi) +static int ad7476_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad7476_state *st = iio_priv(indio_dev); @@ -322,7 +322,7 @@ static struct spi_driver ad7476_driver = { .owner = THIS_MODULE, }, .probe = ad7476_probe, - .remove = __devexit_p(ad7476_remove), + .remove = ad7476_remove, .id_table = ad7476_id, }; module_spi_driver(ad7476_driver); diff --git a/drivers/iio/adc/ad7791.c b/drivers/iio/adc/ad7791.c index e93740843b2b..5e8d1da6887f 100644 --- a/drivers/iio/adc/ad7791.c +++ b/drivers/iio/adc/ad7791.c @@ -325,8 +325,8 @@ static const struct iio_info ad7791_no_filter_info = { .driver_module = THIS_MODULE, }; -static int __devinit ad7791_setup(struct ad7791_state *st, - struct ad7791_platform_data *pdata) +static int ad7791_setup(struct ad7791_state *st, + struct ad7791_platform_data *pdata) { /* Set to poweron-reset default values */ st->mode = AD7791_MODE_BUFFER; @@ -349,7 +349,7 @@ static int __devinit ad7791_setup(struct ad7791_state *st, st->mode); } -static int __devinit ad7791_probe(struct spi_device *spi) +static int ad7791_probe(struct spi_device *spi) { struct ad7791_platform_data *pdata = spi->dev.platform_data; struct iio_dev *indio_dev; @@ -418,7 +418,7 @@ err_iio_free: return ret; } -static int __devexit ad7791_remove(struct spi_device *spi) +static int ad7791_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad7791_state *st = iio_priv(indio_dev); @@ -450,7 +450,7 @@ static struct spi_driver ad7791_driver = { .owner = THIS_MODULE, }, .probe = ad7791_probe, - .remove = __devexit_p(ad7791_remove), + .remove = ad7791_remove, .id_table = ad7791_spi_ids, }; module_spi_driver(ad7791_driver); diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c new file mode 100644 index 000000000000..334e31ff7a4e --- /dev/null +++ b/drivers/iio/adc/ad7793.c @@ -0,0 +1,876 @@ +/* + * AD7785/AD7792/AD7793/AD7794/AD7795 SPI ADC driver + * + * Copyright 2011-2012 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/spi/spi.h> +#include <linux/regulator/consumer.h> +#include <linux/err.h> +#include <linux/sched.h> +#include <linux/delay.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/adc/ad_sigma_delta.h> +#include <linux/platform_data/ad7793.h> + +/* Registers */ +#define AD7793_REG_COMM 0 /* Communications Register (WO, 8-bit) */ +#define AD7793_REG_STAT 0 /* Status Register (RO, 8-bit) */ +#define AD7793_REG_MODE 1 /* Mode Register (RW, 16-bit */ +#define AD7793_REG_CONF 2 /* Configuration Register (RW, 16-bit) */ +#define AD7793_REG_DATA 3 /* Data Register (RO, 16-/24-bit) */ +#define AD7793_REG_ID 4 /* ID Register (RO, 8-bit) */ +#define AD7793_REG_IO 5 /* IO Register (RO, 8-bit) */ +#define AD7793_REG_OFFSET 6 /* Offset Register (RW, 16-bit + * (AD7792)/24-bit (AD7793)) */ +#define AD7793_REG_FULLSALE 7 /* Full-Scale Register + * (RW, 16-bit (AD7792)/24-bit (AD7793)) */ + +/* Communications Register Bit Designations (AD7793_REG_COMM) */ +#define AD7793_COMM_WEN (1 << 7) /* Write Enable */ +#define AD7793_COMM_WRITE (0 << 6) /* Write Operation */ +#define AD7793_COMM_READ (1 << 6) /* Read Operation */ +#define AD7793_COMM_ADDR(x) (((x) & 0x7) << 3) /* Register Address */ +#define AD7793_COMM_CREAD (1 << 2) /* Continuous Read of Data Register */ + +/* Status Register Bit Designations (AD7793_REG_STAT) */ +#define AD7793_STAT_RDY (1 << 7) /* Ready */ +#define AD7793_STAT_ERR (1 << 6) /* Error (Overrange, Underrange) */ +#define AD7793_STAT_CH3 (1 << 2) /* Channel 3 */ +#define AD7793_STAT_CH2 (1 << 1) /* Channel 2 */ +#define AD7793_STAT_CH1 (1 << 0) /* Channel 1 */ + +/* Mode Register Bit Designations (AD7793_REG_MODE) */ +#define AD7793_MODE_SEL(x) (((x) & 0x7) << 13) /* Operation Mode Select */ +#define AD7793_MODE_SEL_MASK (0x7 << 13) /* Operation Mode Select mask */ +#define AD7793_MODE_CLKSRC(x) (((x) & 0x3) << 6) /* ADC Clock Source Select */ +#define AD7793_MODE_RATE(x) ((x) & 0xF) /* Filter Update Rate Select */ + +#define AD7793_MODE_CONT 0 /* Continuous Conversion Mode */ +#define AD7793_MODE_SINGLE 1 /* Single Conversion Mode */ +#define AD7793_MODE_IDLE 2 /* Idle Mode */ +#define AD7793_MODE_PWRDN 3 /* Power-Down Mode */ +#define AD7793_MODE_CAL_INT_ZERO 4 /* Internal Zero-Scale Calibration */ +#define AD7793_MODE_CAL_INT_FULL 5 /* Internal Full-Scale Calibration */ +#define AD7793_MODE_CAL_SYS_ZERO 6 /* System Zero-Scale Calibration */ +#define AD7793_MODE_CAL_SYS_FULL 7 /* System Full-Scale Calibration */ + +#define AD7793_CLK_INT 0 /* Internal 64 kHz Clock not + * available at the CLK pin */ +#define AD7793_CLK_INT_CO 1 /* Internal 64 kHz Clock available + * at the CLK pin */ +#define AD7793_CLK_EXT 2 /* External 64 kHz Clock */ +#define AD7793_CLK_EXT_DIV2 3 /* External Clock divided by 2 */ + +/* Configuration Register Bit Designations (AD7793_REG_CONF) */ +#define AD7793_CONF_VBIAS(x) (((x) & 0x3) << 14) /* Bias Voltage + * Generator Enable */ +#define AD7793_CONF_BO_EN (1 << 13) /* Burnout Current Enable */ +#define AD7793_CONF_UNIPOLAR (1 << 12) /* Unipolar/Bipolar Enable */ +#define AD7793_CONF_BOOST (1 << 11) /* Boost Enable */ +#define AD7793_CONF_GAIN(x) (((x) & 0x7) << 8) /* Gain Select */ +#define AD7793_CONF_REFSEL(x) ((x) << 6) /* INT/EXT Reference Select */ +#define AD7793_CONF_BUF (1 << 4) /* Buffered Mode Enable */ +#define AD7793_CONF_CHAN(x) ((x) & 0xf) /* Channel select */ +#define AD7793_CONF_CHAN_MASK 0xf /* Channel select mask */ + +#define AD7793_CH_AIN1P_AIN1M 0 /* AIN1(+) - AIN1(-) */ +#define AD7793_CH_AIN2P_AIN2M 1 /* AIN2(+) - AIN2(-) */ +#define AD7793_CH_AIN3P_AIN3M 2 /* AIN3(+) - AIN3(-) */ +#define AD7793_CH_AIN1M_AIN1M 3 /* AIN1(-) - AIN1(-) */ +#define AD7793_CH_TEMP 6 /* Temp Sensor */ +#define AD7793_CH_AVDD_MONITOR 7 /* AVDD Monitor */ + +#define AD7795_CH_AIN4P_AIN4M 4 /* AIN4(+) - AIN4(-) */ +#define AD7795_CH_AIN5P_AIN5M 5 /* AIN5(+) - AIN5(-) */ +#define AD7795_CH_AIN6P_AIN6M 6 /* AIN6(+) - AIN6(-) */ +#define AD7795_CH_AIN1M_AIN1M 8 /* AIN1(-) - AIN1(-) */ + +/* ID Register Bit Designations (AD7793_REG_ID) */ +#define AD7785_ID 0xB +#define AD7792_ID 0xA +#define AD7793_ID 0xB +#define AD7794_ID 0xF +#define AD7795_ID 0xF +#define AD7796_ID 0xA +#define AD7797_ID 0xB +#define AD7798_ID 0x8 +#define AD7799_ID 0x9 +#define AD7793_ID_MASK 0xF + +/* IO (Excitation Current Sources) Register Bit Designations (AD7793_REG_IO) */ +#define AD7793_IO_IEXC1_IOUT1_IEXC2_IOUT2 0 /* IEXC1 connect to IOUT1, + * IEXC2 connect to IOUT2 */ +#define AD7793_IO_IEXC1_IOUT2_IEXC2_IOUT1 1 /* IEXC1 connect to IOUT2, + * IEXC2 connect to IOUT1 */ +#define AD7793_IO_IEXC1_IEXC2_IOUT1 2 /* Both current sources + * IEXC1,2 connect to IOUT1 */ +#define AD7793_IO_IEXC1_IEXC2_IOUT2 3 /* Both current sources + * IEXC1,2 connect to IOUT2 */ + +#define AD7793_IO_IXCEN_10uA (1 << 0) /* Excitation Current 10uA */ +#define AD7793_IO_IXCEN_210uA (2 << 0) /* Excitation Current 210uA */ +#define AD7793_IO_IXCEN_1mA (3 << 0) /* Excitation Current 1mA */ + +/* NOTE: + * The AD7792/AD7793 features a dual use data out ready DOUT/RDY output. + * In order to avoid contentions on the SPI bus, it's therefore necessary + * to use spi bus locking. + * + * The DOUT/RDY output must also be wired to an interrupt capable GPIO. + */ + +#define AD7793_FLAG_HAS_CLKSEL BIT(0) +#define AD7793_FLAG_HAS_REFSEL BIT(1) +#define AD7793_FLAG_HAS_VBIAS BIT(2) +#define AD7793_HAS_EXITATION_CURRENT BIT(3) +#define AD7793_FLAG_HAS_GAIN BIT(4) +#define AD7793_FLAG_HAS_BUFFER BIT(5) + +struct ad7793_chip_info { + unsigned int id; + const struct iio_chan_spec *channels; + unsigned int num_channels; + unsigned int flags; + + const struct iio_info *iio_info; + const u16 *sample_freq_avail; +}; + +struct ad7793_state { + const struct ad7793_chip_info *chip_info; + struct regulator *reg; + u16 int_vref_mv; + u16 mode; + u16 conf; + u32 scale_avail[8][2]; + + struct ad_sigma_delta sd; + +}; + +enum ad7793_supported_device_ids { + ID_AD7785, + ID_AD7792, + ID_AD7793, + ID_AD7794, + ID_AD7795, + ID_AD7796, + ID_AD7797, + ID_AD7798, + ID_AD7799, +}; + +static struct ad7793_state *ad_sigma_delta_to_ad7793(struct ad_sigma_delta *sd) +{ + return container_of(sd, struct ad7793_state, sd); +} + +static int ad7793_set_channel(struct ad_sigma_delta *sd, unsigned int channel) +{ + struct ad7793_state *st = ad_sigma_delta_to_ad7793(sd); + + st->conf &= ~AD7793_CONF_CHAN_MASK; + st->conf |= AD7793_CONF_CHAN(channel); + + return ad_sd_write_reg(&st->sd, AD7793_REG_CONF, 2, st->conf); +} + +static int ad7793_set_mode(struct ad_sigma_delta *sd, + enum ad_sigma_delta_mode mode) +{ + struct ad7793_state *st = ad_sigma_delta_to_ad7793(sd); + + st->mode &= ~AD7793_MODE_SEL_MASK; + st->mode |= AD7793_MODE_SEL(mode); + + return ad_sd_write_reg(&st->sd, AD7793_REG_MODE, 2, st->mode); +} + +static const struct ad_sigma_delta_info ad7793_sigma_delta_info = { + .set_channel = ad7793_set_channel, + .set_mode = ad7793_set_mode, + .has_registers = true, + .addr_shift = 3, + .read_mask = BIT(6), +}; + +static const struct ad_sd_calib_data ad7793_calib_arr[6] = { + {AD7793_MODE_CAL_INT_ZERO, AD7793_CH_AIN1P_AIN1M}, + {AD7793_MODE_CAL_INT_FULL, AD7793_CH_AIN1P_AIN1M}, + {AD7793_MODE_CAL_INT_ZERO, AD7793_CH_AIN2P_AIN2M}, + {AD7793_MODE_CAL_INT_FULL, AD7793_CH_AIN2P_AIN2M}, + {AD7793_MODE_CAL_INT_ZERO, AD7793_CH_AIN3P_AIN3M}, + {AD7793_MODE_CAL_INT_FULL, AD7793_CH_AIN3P_AIN3M} +}; + +static int ad7793_calibrate_all(struct ad7793_state *st) +{ + return ad_sd_calibrate_all(&st->sd, ad7793_calib_arr, + ARRAY_SIZE(ad7793_calib_arr)); +} + +static int ad7793_check_platform_data(struct ad7793_state *st, + const struct ad7793_platform_data *pdata) +{ + if ((pdata->current_source_direction == AD7793_IEXEC1_IEXEC2_IOUT1 || + pdata->current_source_direction == AD7793_IEXEC1_IEXEC2_IOUT2) && + ((pdata->exitation_current != AD7793_IX_10uA) && + (pdata->exitation_current != AD7793_IX_210uA))) + return -EINVAL; + + if (!(st->chip_info->flags & AD7793_FLAG_HAS_CLKSEL) && + pdata->clock_src != AD7793_CLK_SRC_INT) + return -EINVAL; + + if (!(st->chip_info->flags & AD7793_FLAG_HAS_REFSEL) && + pdata->refsel != AD7793_REFSEL_REFIN1) + return -EINVAL; + + if (!(st->chip_info->flags & AD7793_FLAG_HAS_VBIAS) && + pdata->bias_voltage != AD7793_BIAS_VOLTAGE_DISABLED) + return -EINVAL; + + if (!(st->chip_info->flags & AD7793_HAS_EXITATION_CURRENT) && + pdata->exitation_current != AD7793_IX_DISABLED) + return -EINVAL; + + return 0; +} + +static int ad7793_setup(struct iio_dev *indio_dev, + const struct ad7793_platform_data *pdata, + unsigned int vref_mv) +{ + struct ad7793_state *st = iio_priv(indio_dev); + int i, ret = -1; + unsigned long long scale_uv; + u32 id; + + ret = ad7793_check_platform_data(st, pdata); + if (ret) + return ret; + + /* reset the serial interface */ + ret = spi_write(st->sd.spi, (u8 *)&ret, sizeof(ret)); + if (ret < 0) + goto out; + usleep_range(500, 2000); /* Wait for at least 500us */ + + /* write/read test for device presence */ + ret = ad_sd_read_reg(&st->sd, AD7793_REG_ID, 1, &id); + if (ret) + goto out; + + id &= AD7793_ID_MASK; + + if (id != st->chip_info->id) { + dev_err(&st->sd.spi->dev, "device ID query failed\n"); + goto out; + } + + st->mode = AD7793_MODE_RATE(1); + st->conf = 0; + + if (st->chip_info->flags & AD7793_FLAG_HAS_CLKSEL) + st->mode |= AD7793_MODE_CLKSRC(pdata->clock_src); + if (st->chip_info->flags & AD7793_FLAG_HAS_REFSEL) + st->conf |= AD7793_CONF_REFSEL(pdata->refsel); + if (st->chip_info->flags & AD7793_FLAG_HAS_VBIAS) + st->conf |= AD7793_CONF_VBIAS(pdata->bias_voltage); + if (pdata->buffered || !(st->chip_info->flags & AD7793_FLAG_HAS_BUFFER)) + st->conf |= AD7793_CONF_BUF; + if (pdata->boost_enable && + (st->chip_info->flags & AD7793_FLAG_HAS_VBIAS)) + st->conf |= AD7793_CONF_BOOST; + if (pdata->burnout_current) + st->conf |= AD7793_CONF_BO_EN; + if (pdata->unipolar) + st->conf |= AD7793_CONF_UNIPOLAR; + + if (!(st->chip_info->flags & AD7793_FLAG_HAS_GAIN)) + st->conf |= AD7793_CONF_GAIN(7); + + ret = ad7793_set_mode(&st->sd, AD_SD_MODE_IDLE); + if (ret) + goto out; + + ret = ad7793_set_channel(&st->sd, 0); + if (ret) + goto out; + + if (st->chip_info->flags & AD7793_HAS_EXITATION_CURRENT) { + ret = ad_sd_write_reg(&st->sd, AD7793_REG_IO, 1, + pdata->exitation_current | + (pdata->current_source_direction << 2)); + if (ret) + goto out; + } + + ret = ad7793_calibrate_all(st); + if (ret) + goto out; + + /* Populate available ADC input ranges */ + for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++) { + scale_uv = ((u64)vref_mv * 100000000) + >> (st->chip_info->channels[0].scan_type.realbits - + (!!(st->conf & AD7793_CONF_UNIPOLAR) ? 0 : 1)); + scale_uv >>= i; + + st->scale_avail[i][1] = do_div(scale_uv, 100000000) * 10; + st->scale_avail[i][0] = scale_uv; + } + + return 0; +out: + dev_err(&st->sd.spi->dev, "setup failed\n"); + return ret; +} + +static const u16 ad7793_sample_freq_avail[16] = {0, 470, 242, 123, 62, 50, 39, + 33, 19, 17, 16, 12, 10, 8, 6, 4}; + +static const u16 ad7797_sample_freq_avail[16] = {0, 0, 0, 123, 62, 50, 0, + 33, 0, 17, 16, 12, 10, 8, 6, 4}; + +static ssize_t ad7793_read_frequency(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct ad7793_state *st = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", + st->chip_info->sample_freq_avail[AD7793_MODE_RATE(st->mode)]); +} + +static ssize_t ad7793_write_frequency(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct ad7793_state *st = iio_priv(indio_dev); + long lval; + int i, ret; + + mutex_lock(&indio_dev->mlock); + if (iio_buffer_enabled(indio_dev)) { + mutex_unlock(&indio_dev->mlock); + return -EBUSY; + } + mutex_unlock(&indio_dev->mlock); + + ret = kstrtol(buf, 10, &lval); + if (ret) + return ret; + + if (lval == 0) + return -EINVAL; + + ret = -EINVAL; + + for (i = 0; i < 16; i++) + if (lval == st->chip_info->sample_freq_avail[i]) { + mutex_lock(&indio_dev->mlock); + st->mode &= ~AD7793_MODE_RATE(-1); + st->mode |= AD7793_MODE_RATE(i); + ad_sd_write_reg(&st->sd, AD7793_REG_MODE, + sizeof(st->mode), st->mode); + mutex_unlock(&indio_dev->mlock); + ret = 0; + } + + return ret ? ret : len; +} + +static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, + ad7793_read_frequency, + ad7793_write_frequency); + +static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( + "470 242 123 62 50 39 33 19 17 16 12 10 8 6 4"); + +static IIO_CONST_ATTR_NAMED(sampling_frequency_available_ad7797, + sampling_frequency_available, "123 62 50 33 17 16 12 10 8 6 4"); + +static ssize_t ad7793_show_scale_available(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct ad7793_state *st = iio_priv(indio_dev); + int i, len = 0; + + for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++) + len += sprintf(buf + len, "%d.%09u ", st->scale_avail[i][0], + st->scale_avail[i][1]); + + len += sprintf(buf + len, "\n"); + + return len; +} + +static IIO_DEVICE_ATTR_NAMED(in_m_in_scale_available, + in_voltage-voltage_scale_available, S_IRUGO, + ad7793_show_scale_available, NULL, 0); + +static struct attribute *ad7793_attributes[] = { + &iio_dev_attr_sampling_frequency.dev_attr.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + &iio_dev_attr_in_m_in_scale_available.dev_attr.attr, + NULL +}; + +static const struct attribute_group ad7793_attribute_group = { + .attrs = ad7793_attributes, +}; + +static struct attribute *ad7797_attributes[] = { + &iio_dev_attr_sampling_frequency.dev_attr.attr, + &iio_const_attr_sampling_frequency_available_ad7797.dev_attr.attr, + NULL +}; + +static const struct attribute_group ad7797_attribute_group = { + .attrs = ad7797_attributes, +}; + +static int ad7793_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + struct ad7793_state *st = iio_priv(indio_dev); + int ret; + unsigned long long scale_uv; + bool unipolar = !!(st->conf & AD7793_CONF_UNIPOLAR); + + switch (m) { + case IIO_CHAN_INFO_RAW: + ret = ad_sigma_delta_single_conversion(indio_dev, chan, val); + if (ret < 0) + return ret; + + return IIO_VAL_INT; + + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_VOLTAGE: + if (chan->differential) { + *val = st-> + scale_avail[(st->conf >> 8) & 0x7][0]; + *val2 = st-> + scale_avail[(st->conf >> 8) & 0x7][1]; + return IIO_VAL_INT_PLUS_NANO; + } else { + /* 1170mV / 2^23 * 6 */ + scale_uv = (1170ULL * 1000000000ULL * 6ULL); + } + break; + case IIO_TEMP: + /* 1170mV / 0.81 mV/C / 2^23 */ + scale_uv = 1444444444444444ULL; + break; + default: + return -EINVAL; + } + + scale_uv >>= (chan->scan_type.realbits - (unipolar ? 0 : 1)); + *val = 0; + *val2 = scale_uv; + return IIO_VAL_INT_PLUS_NANO; + case IIO_CHAN_INFO_OFFSET: + if (!unipolar) + *val = -(1 << (chan->scan_type.realbits - 1)); + else + *val = 0; + + /* Kelvin to Celsius */ + if (chan->type == IIO_TEMP) { + unsigned long long offset; + unsigned int shift; + + shift = chan->scan_type.realbits - (unipolar ? 0 : 1); + offset = 273ULL << shift; + do_div(offset, 1444); + *val -= offset; + } + return IIO_VAL_INT; + } + return -EINVAL; +} + +static int ad7793_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct ad7793_state *st = iio_priv(indio_dev); + int ret, i; + unsigned int tmp; + + mutex_lock(&indio_dev->mlock); + if (iio_buffer_enabled(indio_dev)) { + mutex_unlock(&indio_dev->mlock); + return -EBUSY; + } + + switch (mask) { + case IIO_CHAN_INFO_SCALE: + ret = -EINVAL; + for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++) + if (val2 == st->scale_avail[i][1]) { + ret = 0; + tmp = st->conf; + st->conf &= ~AD7793_CONF_GAIN(-1); + st->conf |= AD7793_CONF_GAIN(i); + + if (tmp == st->conf) + break; + + ad_sd_write_reg(&st->sd, AD7793_REG_CONF, + sizeof(st->conf), st->conf); + ad7793_calibrate_all(st); + break; + } + break; + default: + ret = -EINVAL; + } + + mutex_unlock(&indio_dev->mlock); + return ret; +} + +static int ad7793_write_raw_get_fmt(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + long mask) +{ + return IIO_VAL_INT_PLUS_NANO; +} + +static const struct iio_info ad7793_info = { + .read_raw = &ad7793_read_raw, + .write_raw = &ad7793_write_raw, + .write_raw_get_fmt = &ad7793_write_raw_get_fmt, + .attrs = &ad7793_attribute_group, + .validate_trigger = ad_sd_validate_trigger, + .driver_module = THIS_MODULE, +}; + +static const struct iio_info ad7797_info = { + .read_raw = &ad7793_read_raw, + .write_raw = &ad7793_write_raw, + .write_raw_get_fmt = &ad7793_write_raw_get_fmt, + .attrs = &ad7793_attribute_group, + .validate_trigger = ad_sd_validate_trigger, + .driver_module = THIS_MODULE, +}; + +#define DECLARE_AD7793_CHANNELS(_name, _b, _sb, _s) \ +const struct iio_chan_spec _name##_channels[] = { \ + AD_SD_DIFF_CHANNEL(0, 0, 0, AD7793_CH_AIN1P_AIN1M, (_b), (_sb), (_s)), \ + AD_SD_DIFF_CHANNEL(1, 1, 1, AD7793_CH_AIN2P_AIN2M, (_b), (_sb), (_s)), \ + AD_SD_DIFF_CHANNEL(2, 2, 2, AD7793_CH_AIN3P_AIN3M, (_b), (_sb), (_s)), \ + AD_SD_SHORTED_CHANNEL(3, 0, AD7793_CH_AIN1M_AIN1M, (_b), (_sb), (_s)), \ + AD_SD_TEMP_CHANNEL(4, AD7793_CH_TEMP, (_b), (_sb), (_s)), \ + AD_SD_SUPPLY_CHANNEL(5, 3, AD7793_CH_AVDD_MONITOR, (_b), (_sb), (_s)), \ + IIO_CHAN_SOFT_TIMESTAMP(6), \ +} + +#define DECLARE_AD7795_CHANNELS(_name, _b, _sb) \ +const struct iio_chan_spec _name##_channels[] = { \ + AD_SD_DIFF_CHANNEL(0, 0, 0, AD7793_CH_AIN1P_AIN1M, (_b), (_sb), 0), \ + AD_SD_DIFF_CHANNEL(1, 1, 1, AD7793_CH_AIN2P_AIN2M, (_b), (_sb), 0), \ + AD_SD_DIFF_CHANNEL(2, 2, 2, AD7793_CH_AIN3P_AIN3M, (_b), (_sb), 0), \ + AD_SD_DIFF_CHANNEL(3, 3, 3, AD7795_CH_AIN4P_AIN4M, (_b), (_sb), 0), \ + AD_SD_DIFF_CHANNEL(4, 4, 4, AD7795_CH_AIN5P_AIN5M, (_b), (_sb), 0), \ + AD_SD_DIFF_CHANNEL(5, 5, 5, AD7795_CH_AIN6P_AIN6M, (_b), (_sb), 0), \ + AD_SD_SHORTED_CHANNEL(6, 0, AD7795_CH_AIN1M_AIN1M, (_b), (_sb), 0), \ + AD_SD_TEMP_CHANNEL(7, AD7793_CH_TEMP, (_b), (_sb), 0), \ + AD_SD_SUPPLY_CHANNEL(8, 3, AD7793_CH_AVDD_MONITOR, (_b), (_sb), 0), \ + IIO_CHAN_SOFT_TIMESTAMP(9), \ +} + +#define DECLARE_AD7797_CHANNELS(_name, _b, _sb) \ +const struct iio_chan_spec _name##_channels[] = { \ + AD_SD_DIFF_CHANNEL(0, 0, 0, AD7793_CH_AIN1P_AIN1M, (_b), (_sb), 0), \ + AD_SD_SHORTED_CHANNEL(1, 0, AD7793_CH_AIN1M_AIN1M, (_b), (_sb), 0), \ + AD_SD_TEMP_CHANNEL(2, AD7793_CH_TEMP, (_b), (_sb), 0), \ + AD_SD_SUPPLY_CHANNEL(3, 3, AD7793_CH_AVDD_MONITOR, (_b), (_sb), 0), \ + IIO_CHAN_SOFT_TIMESTAMP(4), \ +} + +#define DECLARE_AD7799_CHANNELS(_name, _b, _sb) \ +const struct iio_chan_spec _name##_channels[] = { \ + AD_SD_DIFF_CHANNEL(0, 0, 0, AD7793_CH_AIN1P_AIN1M, (_b), (_sb), 0), \ + AD_SD_DIFF_CHANNEL(1, 1, 1, AD7793_CH_AIN2P_AIN2M, (_b), (_sb), 0), \ + AD_SD_DIFF_CHANNEL(2, 2, 2, AD7793_CH_AIN3P_AIN3M, (_b), (_sb), 0), \ + AD_SD_SHORTED_CHANNEL(3, 0, AD7793_CH_AIN1M_AIN1M, (_b), (_sb), 0), \ + AD_SD_SUPPLY_CHANNEL(4, 3, AD7793_CH_AVDD_MONITOR, (_b), (_sb), 0), \ + IIO_CHAN_SOFT_TIMESTAMP(5), \ +} + +static DECLARE_AD7793_CHANNELS(ad7785, 20, 32, 4); +static DECLARE_AD7793_CHANNELS(ad7792, 16, 32, 0); +static DECLARE_AD7793_CHANNELS(ad7793, 24, 32, 0); +static DECLARE_AD7795_CHANNELS(ad7794, 16, 32); +static DECLARE_AD7795_CHANNELS(ad7795, 24, 32); +static DECLARE_AD7797_CHANNELS(ad7796, 16, 16); +static DECLARE_AD7797_CHANNELS(ad7797, 24, 32); +static DECLARE_AD7799_CHANNELS(ad7798, 16, 16); +static DECLARE_AD7799_CHANNELS(ad7799, 24, 32); + +static const struct ad7793_chip_info ad7793_chip_info_tbl[] = { + [ID_AD7785] = { + .id = AD7785_ID, + .channels = ad7785_channels, + .num_channels = ARRAY_SIZE(ad7785_channels), + .iio_info = &ad7793_info, + .sample_freq_avail = ad7793_sample_freq_avail, + .flags = AD7793_FLAG_HAS_CLKSEL | + AD7793_FLAG_HAS_REFSEL | + AD7793_FLAG_HAS_VBIAS | + AD7793_HAS_EXITATION_CURRENT | + AD7793_FLAG_HAS_GAIN | + AD7793_FLAG_HAS_BUFFER, + }, + [ID_AD7792] = { + .id = AD7792_ID, + .channels = ad7792_channels, + .num_channels = ARRAY_SIZE(ad7792_channels), + .iio_info = &ad7793_info, + .sample_freq_avail = ad7793_sample_freq_avail, + .flags = AD7793_FLAG_HAS_CLKSEL | + AD7793_FLAG_HAS_REFSEL | + AD7793_FLAG_HAS_VBIAS | + AD7793_HAS_EXITATION_CURRENT | + AD7793_FLAG_HAS_GAIN | + AD7793_FLAG_HAS_BUFFER, + }, + [ID_AD7793] = { + .id = AD7793_ID, + .channels = ad7793_channels, + .num_channels = ARRAY_SIZE(ad7793_channels), + .iio_info = &ad7793_info, + .sample_freq_avail = ad7793_sample_freq_avail, + .flags = AD7793_FLAG_HAS_CLKSEL | + AD7793_FLAG_HAS_REFSEL | + AD7793_FLAG_HAS_VBIAS | + AD7793_HAS_EXITATION_CURRENT | + AD7793_FLAG_HAS_GAIN | + AD7793_FLAG_HAS_BUFFER, + }, + [ID_AD7794] = { + .id = AD7794_ID, + .channels = ad7794_channels, + .num_channels = ARRAY_SIZE(ad7794_channels), + .iio_info = &ad7793_info, + .sample_freq_avail = ad7793_sample_freq_avail, + .flags = AD7793_FLAG_HAS_CLKSEL | + AD7793_FLAG_HAS_REFSEL | + AD7793_FLAG_HAS_VBIAS | + AD7793_HAS_EXITATION_CURRENT | + AD7793_FLAG_HAS_GAIN | + AD7793_FLAG_HAS_BUFFER, + }, + [ID_AD7795] = { + .id = AD7795_ID, + .channels = ad7795_channels, + .num_channels = ARRAY_SIZE(ad7795_channels), + .iio_info = &ad7793_info, + .sample_freq_avail = ad7793_sample_freq_avail, + .flags = AD7793_FLAG_HAS_CLKSEL | + AD7793_FLAG_HAS_REFSEL | + AD7793_FLAG_HAS_VBIAS | + AD7793_HAS_EXITATION_CURRENT | + AD7793_FLAG_HAS_GAIN | + AD7793_FLAG_HAS_BUFFER, + }, + [ID_AD7796] = { + .id = AD7796_ID, + .channels = ad7796_channels, + .num_channels = ARRAY_SIZE(ad7796_channels), + .iio_info = &ad7797_info, + .sample_freq_avail = ad7797_sample_freq_avail, + .flags = AD7793_FLAG_HAS_CLKSEL, + }, + [ID_AD7797] = { + .id = AD7797_ID, + .channels = ad7797_channels, + .num_channels = ARRAY_SIZE(ad7797_channels), + .iio_info = &ad7797_info, + .sample_freq_avail = ad7797_sample_freq_avail, + .flags = AD7793_FLAG_HAS_CLKSEL, + }, + [ID_AD7798] = { + .id = AD7798_ID, + .channels = ad7798_channels, + .num_channels = ARRAY_SIZE(ad7798_channels), + .iio_info = &ad7793_info, + .sample_freq_avail = ad7793_sample_freq_avail, + .flags = AD7793_FLAG_HAS_GAIN | + AD7793_FLAG_HAS_BUFFER, + }, + [ID_AD7799] = { + .id = AD7799_ID, + .channels = ad7799_channels, + .num_channels = ARRAY_SIZE(ad7799_channels), + .iio_info = &ad7793_info, + .sample_freq_avail = ad7793_sample_freq_avail, + .flags = AD7793_FLAG_HAS_GAIN | + AD7793_FLAG_HAS_BUFFER, + }, +}; + +static int ad7793_probe(struct spi_device *spi) +{ + const struct ad7793_platform_data *pdata = spi->dev.platform_data; + struct ad7793_state *st; + struct iio_dev *indio_dev; + int ret, vref_mv = 0; + + if (!pdata) { + dev_err(&spi->dev, "no platform data?\n"); + return -ENODEV; + } + + if (!spi->irq) { + dev_err(&spi->dev, "no IRQ?\n"); + return -ENODEV; + } + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) + return -ENOMEM; + + st = iio_priv(indio_dev); + + ad_sd_init(&st->sd, indio_dev, spi, &ad7793_sigma_delta_info); + + if (pdata->refsel != AD7793_REFSEL_INTERNAL) { + st->reg = regulator_get(&spi->dev, "refin"); + if (IS_ERR(st->reg)) { + ret = PTR_ERR(st->reg); + goto error_device_free; + } + + ret = regulator_enable(st->reg); + if (ret) + goto error_put_reg; + + vref_mv = regulator_get_voltage(st->reg); + if (vref_mv < 0) { + ret = vref_mv; + goto error_disable_reg; + } + + vref_mv /= 1000; + } else { + vref_mv = 1170; /* Build-in ref */ + } + + st->chip_info = + &ad7793_chip_info_tbl[spi_get_device_id(spi)->driver_data]; + + spi_set_drvdata(spi, indio_dev); + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = st->chip_info->channels; + indio_dev->num_channels = st->chip_info->num_channels; + indio_dev->info = st->chip_info->iio_info; + + ret = ad_sd_setup_buffer_and_trigger(indio_dev); + if (ret) + goto error_disable_reg; + + ret = ad7793_setup(indio_dev, pdata, vref_mv); + if (ret) + goto error_remove_trigger; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_remove_trigger; + + return 0; + +error_remove_trigger: + ad_sd_cleanup_buffer_and_trigger(indio_dev); +error_disable_reg: + if (pdata->refsel != AD7793_REFSEL_INTERNAL) + regulator_disable(st->reg); +error_put_reg: + if (pdata->refsel != AD7793_REFSEL_INTERNAL) + regulator_put(st->reg); +error_device_free: + iio_device_free(indio_dev); + + return ret; +} + +static int ad7793_remove(struct spi_device *spi) +{ + const struct ad7793_platform_data *pdata = spi->dev.platform_data; + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad7793_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + ad_sd_cleanup_buffer_and_trigger(indio_dev); + + if (pdata->refsel != AD7793_REFSEL_INTERNAL) { + regulator_disable(st->reg); + regulator_put(st->reg); + } + + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad7793_id[] = { + {"ad7785", ID_AD7785}, + {"ad7792", ID_AD7792}, + {"ad7793", ID_AD7793}, + {"ad7794", ID_AD7794}, + {"ad7795", ID_AD7795}, + {"ad7796", ID_AD7796}, + {"ad7797", ID_AD7797}, + {"ad7798", ID_AD7798}, + {"ad7799", ID_AD7799}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad7793_id); + +static struct spi_driver ad7793_driver = { + .driver = { + .name = "ad7793", + .owner = THIS_MODULE, + }, + .probe = ad7793_probe, + .remove = ad7793_remove, + .id_table = ad7793_id, +}; +module_spi_driver(ad7793_driver); + +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("Analog Devices AD7793 and simialr ADCs"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/adc/ad7887.c b/drivers/iio/adc/ad7887.c new file mode 100644 index 000000000000..a33d5cd1a536 --- /dev/null +++ b/drivers/iio/adc/ad7887.c @@ -0,0 +1,378 @@ +/* + * AD7887 SPI ADC driver + * + * Copyright 2010-2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/spi/spi.h> +#include <linux/regulator/consumer.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/interrupt.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> + +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#include <linux/platform_data/ad7887.h> + +#define AD7887_REF_DIS (1 << 5) /* on-chip reference disable */ +#define AD7887_DUAL (1 << 4) /* dual-channel mode */ +#define AD7887_CH_AIN1 (1 << 3) /* convert on channel 1, DUAL=1 */ +#define AD7887_CH_AIN0 (0 << 3) /* convert on channel 0, DUAL=0,1 */ +#define AD7887_PM_MODE1 (0) /* CS based shutdown */ +#define AD7887_PM_MODE2 (1) /* full on */ +#define AD7887_PM_MODE3 (2) /* auto shutdown after conversion */ +#define AD7887_PM_MODE4 (3) /* standby mode */ + +enum ad7887_channels { + AD7887_CH0, + AD7887_CH0_CH1, + AD7887_CH1, +}; + +#define RES_MASK(bits) ((1 << (bits)) - 1) + +/** + * struct ad7887_chip_info - chip specifc information + * @int_vref_mv: the internal reference voltage + * @channel: channel specification + */ +struct ad7887_chip_info { + u16 int_vref_mv; + struct iio_chan_spec channel[3]; +}; + +struct ad7887_state { + struct spi_device *spi; + const struct ad7887_chip_info *chip_info; + struct regulator *reg; + struct spi_transfer xfer[4]; + struct spi_message msg[3]; + struct spi_message *ring_msg; + unsigned char tx_cmd_buf[4]; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + * Buffer needs to be large enough to hold two 16 bit samples and a + * 64 bit aligned 64 bit timestamp. + */ + unsigned char data[ALIGN(4, sizeof(s64)) + sizeof(s64)] + ____cacheline_aligned; +}; + +enum ad7887_supported_device_ids { + ID_AD7887 +}; + +static int ad7887_ring_preenable(struct iio_dev *indio_dev) +{ + struct ad7887_state *st = iio_priv(indio_dev); + int ret; + + ret = iio_sw_buffer_preenable(indio_dev); + if (ret < 0) + return ret; + + /* We know this is a single long so can 'cheat' */ + switch (*indio_dev->active_scan_mask) { + case (1 << 0): + st->ring_msg = &st->msg[AD7887_CH0]; + break; + case (1 << 1): + st->ring_msg = &st->msg[AD7887_CH1]; + /* Dummy read: push CH1 setting down to hardware */ + spi_sync(st->spi, st->ring_msg); + break; + case ((1 << 1) | (1 << 0)): + st->ring_msg = &st->msg[AD7887_CH0_CH1]; + break; + } + + return 0; +} + +static int ad7887_ring_postdisable(struct iio_dev *indio_dev) +{ + struct ad7887_state *st = iio_priv(indio_dev); + + /* dummy read: restore default CH0 settin */ + return spi_sync(st->spi, &st->msg[AD7887_CH0]); +} + +/** + * ad7887_trigger_handler() bh of trigger launched polling to ring buffer + * + * Currently there is no option in this driver to disable the saving of + * timestamps within the ring. + **/ +static irqreturn_t ad7887_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct ad7887_state *st = iio_priv(indio_dev); + s64 time_ns; + int b_sent; + + b_sent = spi_sync(st->spi, st->ring_msg); + if (b_sent) + goto done; + + time_ns = iio_get_time_ns(); + + if (indio_dev->scan_timestamp) + memcpy(st->data + indio_dev->scan_bytes - sizeof(s64), + &time_ns, sizeof(time_ns)); + + iio_push_to_buffers(indio_dev, st->data); +done: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static const struct iio_buffer_setup_ops ad7887_ring_setup_ops = { + .preenable = &ad7887_ring_preenable, + .postenable = &iio_triggered_buffer_postenable, + .predisable = &iio_triggered_buffer_predisable, + .postdisable = &ad7887_ring_postdisable, +}; + +static int ad7887_scan_direct(struct ad7887_state *st, unsigned ch) +{ + int ret = spi_sync(st->spi, &st->msg[ch]); + if (ret) + return ret; + + return (st->data[(ch * 2)] << 8) | st->data[(ch * 2) + 1]; +} + +static int ad7887_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + int ret; + struct ad7887_state *st = iio_priv(indio_dev); + + switch (m) { + case IIO_CHAN_INFO_RAW: + mutex_lock(&indio_dev->mlock); + if (iio_buffer_enabled(indio_dev)) + ret = -EBUSY; + else + ret = ad7887_scan_direct(st, chan->address); + mutex_unlock(&indio_dev->mlock); + + if (ret < 0) + return ret; + *val = ret >> chan->scan_type.shift; + *val &= RES_MASK(chan->scan_type.realbits); + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + if (st->reg) { + *val = regulator_get_voltage(st->reg); + if (*val < 0) + return *val; + *val /= 1000; + } else { + *val = st->chip_info->int_vref_mv; + } + + *val2 = chan->scan_type.realbits; + + return IIO_VAL_FRACTIONAL_LOG2; + } + return -EINVAL; +} + + +static const struct ad7887_chip_info ad7887_chip_info_tbl[] = { + /* + * More devices added in future + */ + [ID_AD7887] = { + .channel[0] = { + .type = IIO_VOLTAGE, + .indexed = 1, + .channel = 1, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT, + .address = 1, + .scan_index = 1, + .scan_type = IIO_ST('u', 12, 16, 0), + }, + .channel[1] = { + .type = IIO_VOLTAGE, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT, + .address = 0, + .scan_index = 0, + .scan_type = IIO_ST('u', 12, 16, 0), + }, + .channel[2] = IIO_CHAN_SOFT_TIMESTAMP(2), + .int_vref_mv = 2500, + }, +}; + +static const struct iio_info ad7887_info = { + .read_raw = &ad7887_read_raw, + .driver_module = THIS_MODULE, +}; + +static int ad7887_probe(struct spi_device *spi) +{ + struct ad7887_platform_data *pdata = spi->dev.platform_data; + struct ad7887_state *st; + struct iio_dev *indio_dev = iio_device_alloc(sizeof(*st)); + uint8_t mode; + int ret; + + if (indio_dev == NULL) + return -ENOMEM; + + st = iio_priv(indio_dev); + + if (!pdata || !pdata->use_onchip_ref) { + st->reg = regulator_get(&spi->dev, "vref"); + if (IS_ERR(st->reg)) { + ret = PTR_ERR(st->reg); + goto error_free; + } + + ret = regulator_enable(st->reg); + if (ret) + goto error_put_reg; + } + + st->chip_info = + &ad7887_chip_info_tbl[spi_get_device_id(spi)->driver_data]; + + spi_set_drvdata(spi, indio_dev); + st->spi = spi; + + /* Estabilish that the iio_dev is a child of the spi device */ + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->info = &ad7887_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + /* Setup default message */ + + mode = AD7887_PM_MODE4; + if (!pdata || !pdata->use_onchip_ref) + mode |= AD7887_REF_DIS; + if (pdata && pdata->en_dual) + mode |= AD7887_DUAL; + + st->tx_cmd_buf[0] = AD7887_CH_AIN0 | mode; + + st->xfer[0].rx_buf = &st->data[0]; + st->xfer[0].tx_buf = &st->tx_cmd_buf[0]; + st->xfer[0].len = 2; + + spi_message_init(&st->msg[AD7887_CH0]); + spi_message_add_tail(&st->xfer[0], &st->msg[AD7887_CH0]); + + if (pdata && pdata->en_dual) { + st->tx_cmd_buf[2] = AD7887_CH_AIN1 | mode; + + st->xfer[1].rx_buf = &st->data[0]; + st->xfer[1].tx_buf = &st->tx_cmd_buf[2]; + st->xfer[1].len = 2; + + st->xfer[2].rx_buf = &st->data[2]; + st->xfer[2].tx_buf = &st->tx_cmd_buf[0]; + st->xfer[2].len = 2; + + spi_message_init(&st->msg[AD7887_CH0_CH1]); + spi_message_add_tail(&st->xfer[1], &st->msg[AD7887_CH0_CH1]); + spi_message_add_tail(&st->xfer[2], &st->msg[AD7887_CH0_CH1]); + + st->xfer[3].rx_buf = &st->data[2]; + st->xfer[3].tx_buf = &st->tx_cmd_buf[2]; + st->xfer[3].len = 2; + + spi_message_init(&st->msg[AD7887_CH1]); + spi_message_add_tail(&st->xfer[3], &st->msg[AD7887_CH1]); + + indio_dev->channels = st->chip_info->channel; + indio_dev->num_channels = 3; + } else { + indio_dev->channels = &st->chip_info->channel[1]; + indio_dev->num_channels = 2; + } + + ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + &ad7887_trigger_handler, &ad7887_ring_setup_ops); + if (ret) + goto error_disable_reg; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_unregister_ring; + + return 0; +error_unregister_ring: + iio_triggered_buffer_cleanup(indio_dev); +error_disable_reg: + if (st->reg) + regulator_disable(st->reg); +error_put_reg: + if (st->reg) + regulator_put(st->reg); +error_free: + iio_device_free(indio_dev); + + return ret; +} + +static int ad7887_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad7887_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + if (st->reg) { + regulator_disable(st->reg); + regulator_put(st->reg); + } + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad7887_id[] = { + {"ad7887", ID_AD7887}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad7887_id); + +static struct spi_driver ad7887_driver = { + .driver = { + .name = "ad7887", + .owner = THIS_MODULE, + }, + .probe = ad7887_probe, + .remove = ad7887_remove, + .id_table = ad7887_id, +}; +module_spi_driver(ad7887_driver); + +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("Analog Devices AD7887 ADC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c index 67baa1363d7a..afe6d78c8ff0 100644 --- a/drivers/iio/adc/ad_sigma_delta.c +++ b/drivers/iio/adc/ad_sigma_delta.c @@ -391,7 +391,7 @@ static irqreturn_t ad_sd_trigger_handler(int irq, void *p) break; } - iio_push_to_buffer(indio_dev->buffer, (uint8_t *)data); + iio_push_to_buffers(indio_dev, (uint8_t *)data); iio_trigger_notify_done(indio_dev->trig); sigma_delta->irq_dis = false; diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c index 3ed94bf80596..83c836ba600f 100644 --- a/drivers/iio/adc/at91_adc.c +++ b/drivers/iio/adc/at91_adc.c @@ -46,7 +46,6 @@ struct at91_adc_state { struct clk *clk; bool done; int irq; - bool irq_enabled; u16 last_value; struct mutex lock; u8 num_channels; @@ -66,7 +65,6 @@ static irqreturn_t at91_adc_trigger_handler(int irq, void *p) struct iio_poll_func *pf = p; struct iio_dev *idev = pf->indio_dev; struct at91_adc_state *st = iio_priv(idev); - struct iio_buffer *buffer = idev->buffer; int i, j = 0; for (i = 0; i < idev->masklength; i++) { @@ -82,10 +80,9 @@ static irqreturn_t at91_adc_trigger_handler(int irq, void *p) *timestamp = pf->timestamp; } - buffer->access->store_to(buffer, (u8 *)st->buffer); + iio_push_to_buffers(idev, (u8 *)st->buffer); iio_trigger_notify_done(idev->trig); - st->irq_enabled = true; /* Needed to ACK the DRDY interruption */ at91_adc_readl(st, AT91_ADC_LCDR); @@ -106,7 +103,6 @@ static irqreturn_t at91_adc_eoc_trigger(int irq, void *private) if (iio_buffer_enabled(idev)) { disable_irq_nosync(irq); - st->irq_enabled = false; iio_trigger_poll(idev->trig, iio_get_time_ns()); } else { st->last_value = at91_adc_readl(st, AT91_ADC_LCDR); @@ -518,7 +514,7 @@ static const struct iio_info at91_adc_info = { .read_raw = &at91_adc_read_raw, }; -static int __devinit at91_adc_probe(struct platform_device *pdev) +static int at91_adc_probe(struct platform_device *pdev) { unsigned int prsc, mstrclk, ticks, adc_clk; int ret; @@ -561,9 +557,9 @@ static int __devinit at91_adc_probe(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - st->reg_base = devm_request_and_ioremap(&pdev->dev, res); - if (!st->reg_base) { - ret = -ENOMEM; + st->reg_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(st->reg_base)) { + ret = PTR_ERR(st->reg_base); goto error_free_device; } @@ -682,7 +678,7 @@ error_ret: return ret; } -static int __devexit at91_adc_remove(struct platform_device *pdev) +static int at91_adc_remove(struct platform_device *pdev) { struct iio_dev *idev = platform_get_drvdata(pdev); struct at91_adc_state *st = iio_priv(idev); @@ -706,7 +702,7 @@ MODULE_DEVICE_TABLE(of, at91_adc_dt_ids); static struct platform_driver at91_adc_driver = { .probe = at91_adc_probe, - .remove = __devexit_p(at91_adc_remove), + .remove = at91_adc_remove, .driver = { .name = "at91_adc", .of_match_table = of_match_ptr(at91_adc_dt_ids), diff --git a/drivers/iio/adc/lp8788_adc.c b/drivers/iio/adc/lp8788_adc.c index a93aaf0bb841..763f57565ee4 100644 --- a/drivers/iio/adc/lp8788_adc.c +++ b/drivers/iio/adc/lp8788_adc.c @@ -179,7 +179,7 @@ static int lp8788_iio_map_register(struct iio_dev *indio_dev, ret = iio_map_array_register(indio_dev, map); if (ret) { - dev_err(adc->lp->dev, "iio map err: %d\n", ret); + dev_err(&indio_dev->dev, "iio map err: %d\n", ret); return ret; } @@ -187,13 +187,7 @@ static int lp8788_iio_map_register(struct iio_dev *indio_dev, return 0; } -static inline void lp8788_iio_map_unregister(struct iio_dev *indio_dev, - struct lp8788_adc *adc) -{ - iio_map_array_unregister(indio_dev, adc->map); -} - -static int __devinit lp8788_adc_probe(struct platform_device *pdev) +static int lp8788_adc_probe(struct platform_device *pdev) { struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent); struct iio_dev *indio_dev; @@ -208,13 +202,14 @@ static int __devinit lp8788_adc_probe(struct platform_device *pdev) adc->lp = lp; platform_set_drvdata(pdev, indio_dev); + indio_dev->dev.of_node = pdev->dev.of_node; ret = lp8788_iio_map_register(indio_dev, lp->pdata, adc); if (ret) goto err_iio_map; mutex_init(&adc->lock); - indio_dev->dev.parent = lp->dev; + indio_dev->dev.parent = &pdev->dev; indio_dev->name = pdev->name; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &lp8788_adc_info; @@ -223,26 +218,25 @@ static int __devinit lp8788_adc_probe(struct platform_device *pdev) ret = iio_device_register(indio_dev); if (ret) { - dev_err(lp->dev, "iio dev register err: %d\n", ret); + dev_err(&pdev->dev, "iio dev register err: %d\n", ret); goto err_iio_device; } return 0; err_iio_device: - lp8788_iio_map_unregister(indio_dev, adc); + iio_map_array_unregister(indio_dev); err_iio_map: iio_device_free(indio_dev); return ret; } -static int __devexit lp8788_adc_remove(struct platform_device *pdev) +static int lp8788_adc_remove(struct platform_device *pdev) { struct iio_dev *indio_dev = platform_get_drvdata(pdev); - struct lp8788_adc *adc = iio_priv(indio_dev); iio_device_unregister(indio_dev); - lp8788_iio_map_unregister(indio_dev, adc); + iio_map_array_unregister(indio_dev); iio_device_free(indio_dev); return 0; @@ -250,7 +244,7 @@ static int __devexit lp8788_adc_remove(struct platform_device *pdev) static struct platform_driver lp8788_adc_driver = { .probe = lp8788_adc_probe, - .remove = __devexit_p(lp8788_adc_remove), + .remove = lp8788_adc_remove, .driver = { .name = LP8788_DEV_ADC, .owner = THIS_MODULE, diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c new file mode 100644 index 000000000000..6c1cfb74bdfc --- /dev/null +++ b/drivers/iio/adc/max1363.c @@ -0,0 +1,1666 @@ + /* + * iio/adc/max1363.c + * Copyright (C) 2008-2010 Jonathan Cameron + * + * based on linux/drivers/i2c/chips/max123x + * Copyright (C) 2002-2004 Stefan Eletzhofer + * + * based on linux/drivers/acron/char/pcf8583.c + * Copyright (C) 2000 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * max1363.c + * + * Partial support for max1363 and similar chips. + * + * Not currently implemented. + * + * - Control of internal reference. + */ + +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/sysfs.h> +#include <linux/list.h> +#include <linux/i2c.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> +#include <linux/err.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/events.h> +#include <linux/iio/buffer.h> +#include <linux/iio/driver.h> +#include <linux/iio/kfifo_buf.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#define MAX1363_SETUP_BYTE(a) ((a) | 0x80) + +/* There is a fair bit more defined here than currently + * used, but the intention is to support everything these + * chips do in the long run */ + +/* see data sheets */ +/* max1363 and max1236, max1237, max1238, max1239 */ +#define MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_VDD 0x00 +#define MAX1363_SETUP_AIN3_IS_REF_EXT_TO_REF 0x20 +#define MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_INT 0x40 +#define MAX1363_SETUP_AIN3_IS_REF_REF_IS_INT 0x60 +#define MAX1363_SETUP_POWER_UP_INT_REF 0x10 +#define MAX1363_SETUP_POWER_DOWN_INT_REF 0x00 + +/* think about including max11600 etc - more settings */ +#define MAX1363_SETUP_EXT_CLOCK 0x08 +#define MAX1363_SETUP_INT_CLOCK 0x00 +#define MAX1363_SETUP_UNIPOLAR 0x00 +#define MAX1363_SETUP_BIPOLAR 0x04 +#define MAX1363_SETUP_RESET 0x00 +#define MAX1363_SETUP_NORESET 0x02 +/* max1363 only - though don't care on others. + * For now monitor modes are not implemented as the relevant + * line is not connected on my test board. + * The definitions are here as I intend to add this soon. + */ +#define MAX1363_SETUP_MONITOR_SETUP 0x01 + +/* Specific to the max1363 */ +#define MAX1363_MON_RESET_CHAN(a) (1 << ((a) + 4)) +#define MAX1363_MON_INT_ENABLE 0x01 + +/* defined for readability reasons */ +/* All chips */ +#define MAX1363_CONFIG_BYTE(a) ((a)) + +#define MAX1363_CONFIG_SE 0x01 +#define MAX1363_CONFIG_DE 0x00 +#define MAX1363_CONFIG_SCAN_TO_CS 0x00 +#define MAX1363_CONFIG_SCAN_SINGLE_8 0x20 +#define MAX1363_CONFIG_SCAN_MONITOR_MODE 0x40 +#define MAX1363_CONFIG_SCAN_SINGLE_1 0x60 +/* max123{6-9} only */ +#define MAX1236_SCAN_MID_TO_CHANNEL 0x40 + +/* max1363 only - merely part of channel selects or don't care for others */ +#define MAX1363_CONFIG_EN_MON_MODE_READ 0x18 + +#define MAX1363_CHANNEL_SEL(a) ((a) << 1) + +/* max1363 strictly 0x06 - but doesn't matter */ +#define MAX1363_CHANNEL_SEL_MASK 0x1E +#define MAX1363_SCAN_MASK 0x60 +#define MAX1363_SE_DE_MASK 0x01 + +#define MAX1363_MAX_CHANNELS 25 +/** + * struct max1363_mode - scan mode information + * @conf: The corresponding value of the configuration register + * @modemask: Bit mask corresponding to channels enabled in this mode + */ +struct max1363_mode { + int8_t conf; + DECLARE_BITMAP(modemask, MAX1363_MAX_CHANNELS); +}; + +/* This must be maintained along side the max1363_mode_table in max1363_core */ +enum max1363_modes { + /* Single read of a single channel */ + _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, _s8, _s9, _s10, _s11, + /* Differential single read */ + d0m1, d2m3, d4m5, d6m7, d8m9, d10m11, + d1m0, d3m2, d5m4, d7m6, d9m8, d11m10, + /* Scan to channel and mid to channel where overlapping */ + s0to1, s0to2, s2to3, s0to3, s0to4, s0to5, s0to6, + s6to7, s0to7, s6to8, s0to8, s6to9, + s0to9, s6to10, s0to10, s6to11, s0to11, + /* Differential scan to channel and mid to channel where overlapping */ + d0m1to2m3, d0m1to4m5, d0m1to6m7, d6m7to8m9, + d0m1to8m9, d6m7to10m11, d0m1to10m11, d1m0to3m2, + d1m0to5m4, d1m0to7m6, d7m6to9m8, d1m0to9m8, + d7m6to11m10, d1m0to11m10, +}; + +/** + * struct max1363_chip_info - chip specifc information + * @info: iio core function callbacks structure + * @channels: channel specification + * @num_channels: number of channels + * @mode_list: array of available scan modes + * @default_mode: the scan mode in which the chip starts up + * @int_vref_mv: the internal reference voltage + * @num_modes: number of modes + * @bits: accuracy of the adc in bits + */ +struct max1363_chip_info { + const struct iio_info *info; + const struct iio_chan_spec *channels; + int num_channels; + const enum max1363_modes *mode_list; + enum max1363_modes default_mode; + u16 int_vref_mv; + u8 num_modes; + u8 bits; +}; + +/** + * struct max1363_state - driver instance specific data + * @client: i2c_client + * @setupbyte: cache of current device setup byte + * @configbyte: cache of current device config byte + * @chip_info: chip model specific constants, available modes, etc. + * @current_mode: the scan mode of this chip + * @requestedmask: a valid requested set of channels + * @reg: supply regulator + * @monitor_on: whether monitor mode is enabled + * @monitor_speed: parameter corresponding to device monitor speed setting + * @mask_high: bitmask for enabled high thresholds + * @mask_low: bitmask for enabled low thresholds + * @thresh_high: high threshold values + * @thresh_low: low threshold values + * @vref: Reference voltage regulator + * @vref_uv: Actual (external or internal) reference voltage + */ +struct max1363_state { + struct i2c_client *client; + u8 setupbyte; + u8 configbyte; + const struct max1363_chip_info *chip_info; + const struct max1363_mode *current_mode; + u32 requestedmask; + struct regulator *reg; + + /* Using monitor modes and buffer at the same time is + currently not supported */ + bool monitor_on; + unsigned int monitor_speed:3; + u8 mask_high; + u8 mask_low; + /* 4x unipolar first then the fours bipolar ones */ + s16 thresh_high[8]; + s16 thresh_low[8]; + struct regulator *vref; + u32 vref_uv; +}; + +#define MAX1363_MODE_SINGLE(_num, _mask) { \ + .conf = MAX1363_CHANNEL_SEL(_num) \ + | MAX1363_CONFIG_SCAN_SINGLE_1 \ + | MAX1363_CONFIG_SE, \ + .modemask[0] = _mask, \ + } + +#define MAX1363_MODE_SCAN_TO_CHANNEL(_num, _mask) { \ + .conf = MAX1363_CHANNEL_SEL(_num) \ + | MAX1363_CONFIG_SCAN_TO_CS \ + | MAX1363_CONFIG_SE, \ + .modemask[0] = _mask, \ + } + +/* note not available for max1363 hence naming */ +#define MAX1236_MODE_SCAN_MID_TO_CHANNEL(_mid, _num, _mask) { \ + .conf = MAX1363_CHANNEL_SEL(_num) \ + | MAX1236_SCAN_MID_TO_CHANNEL \ + | MAX1363_CONFIG_SE, \ + .modemask[0] = _mask \ +} + +#define MAX1363_MODE_DIFF_SINGLE(_nump, _numm, _mask) { \ + .conf = MAX1363_CHANNEL_SEL(_nump) \ + | MAX1363_CONFIG_SCAN_SINGLE_1 \ + | MAX1363_CONFIG_DE, \ + .modemask[0] = _mask \ + } + +/* Can't think how to automate naming so specify for now */ +#define MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(_num, _numvals, _mask) { \ + .conf = MAX1363_CHANNEL_SEL(_num) \ + | MAX1363_CONFIG_SCAN_TO_CS \ + | MAX1363_CONFIG_DE, \ + .modemask[0] = _mask \ + } + +/* note only available for max1363 hence naming */ +#define MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(_num, _numvals, _mask) { \ + .conf = MAX1363_CHANNEL_SEL(_num) \ + | MAX1236_SCAN_MID_TO_CHANNEL \ + | MAX1363_CONFIG_SE, \ + .modemask[0] = _mask \ +} + +static const struct max1363_mode max1363_mode_table[] = { + /* All of the single channel options first */ + MAX1363_MODE_SINGLE(0, 1 << 0), + MAX1363_MODE_SINGLE(1, 1 << 1), + MAX1363_MODE_SINGLE(2, 1 << 2), + MAX1363_MODE_SINGLE(3, 1 << 3), + MAX1363_MODE_SINGLE(4, 1 << 4), + MAX1363_MODE_SINGLE(5, 1 << 5), + MAX1363_MODE_SINGLE(6, 1 << 6), + MAX1363_MODE_SINGLE(7, 1 << 7), + MAX1363_MODE_SINGLE(8, 1 << 8), + MAX1363_MODE_SINGLE(9, 1 << 9), + MAX1363_MODE_SINGLE(10, 1 << 10), + MAX1363_MODE_SINGLE(11, 1 << 11), + + MAX1363_MODE_DIFF_SINGLE(0, 1, 1 << 12), + MAX1363_MODE_DIFF_SINGLE(2, 3, 1 << 13), + MAX1363_MODE_DIFF_SINGLE(4, 5, 1 << 14), + MAX1363_MODE_DIFF_SINGLE(6, 7, 1 << 15), + MAX1363_MODE_DIFF_SINGLE(8, 9, 1 << 16), + MAX1363_MODE_DIFF_SINGLE(10, 11, 1 << 17), + MAX1363_MODE_DIFF_SINGLE(1, 0, 1 << 18), + MAX1363_MODE_DIFF_SINGLE(3, 2, 1 << 19), + MAX1363_MODE_DIFF_SINGLE(5, 4, 1 << 20), + MAX1363_MODE_DIFF_SINGLE(7, 6, 1 << 21), + MAX1363_MODE_DIFF_SINGLE(9, 8, 1 << 22), + MAX1363_MODE_DIFF_SINGLE(11, 10, 1 << 23), + + /* The multichannel scans next */ + MAX1363_MODE_SCAN_TO_CHANNEL(1, 0x003), + MAX1363_MODE_SCAN_TO_CHANNEL(2, 0x007), + MAX1236_MODE_SCAN_MID_TO_CHANNEL(2, 3, 0x00C), + MAX1363_MODE_SCAN_TO_CHANNEL(3, 0x00F), + MAX1363_MODE_SCAN_TO_CHANNEL(4, 0x01F), + MAX1363_MODE_SCAN_TO_CHANNEL(5, 0x03F), + MAX1363_MODE_SCAN_TO_CHANNEL(6, 0x07F), + MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 7, 0x0C0), + MAX1363_MODE_SCAN_TO_CHANNEL(7, 0x0FF), + MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 8, 0x1C0), + MAX1363_MODE_SCAN_TO_CHANNEL(8, 0x1FF), + MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 9, 0x3C0), + MAX1363_MODE_SCAN_TO_CHANNEL(9, 0x3FF), + MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 10, 0x7C0), + MAX1363_MODE_SCAN_TO_CHANNEL(10, 0x7FF), + MAX1236_MODE_SCAN_MID_TO_CHANNEL(6, 11, 0xFC0), + MAX1363_MODE_SCAN_TO_CHANNEL(11, 0xFFF), + + MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(2, 2, 0x003000), + MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(4, 3, 0x007000), + MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(6, 4, 0x00F000), + MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(8, 2, 0x018000), + MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(8, 5, 0x01F000), + MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(10, 3, 0x038000), + MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(10, 6, 0x3F000), + MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(3, 2, 0x0C0000), + MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(5, 3, 0x1C0000), + MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(7, 4, 0x3C0000), + MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(9, 2, 0x600000), + MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(9, 5, 0x7C0000), + MAX1236_MODE_DIFF_SCAN_MID_TO_CHANNEL(11, 3, 0xE00000), + MAX1363_MODE_DIFF_SCAN_TO_CHANNEL(11, 6, 0xFC0000), +}; + +static const struct max1363_mode +*max1363_match_mode(const unsigned long *mask, + const struct max1363_chip_info *ci) +{ + int i; + if (mask) + for (i = 0; i < ci->num_modes; i++) + if (bitmap_subset(mask, + max1363_mode_table[ci->mode_list[i]]. + modemask, + MAX1363_MAX_CHANNELS)) + return &max1363_mode_table[ci->mode_list[i]]; + return NULL; +} + +static int max1363_write_basic_config(struct i2c_client *client, + unsigned char d1, + unsigned char d2) +{ + u8 tx_buf[2] = {d1, d2}; + + return i2c_master_send(client, tx_buf, 2); +} + +static int max1363_set_scan_mode(struct max1363_state *st) +{ + st->configbyte &= ~(MAX1363_CHANNEL_SEL_MASK + | MAX1363_SCAN_MASK + | MAX1363_SE_DE_MASK); + st->configbyte |= st->current_mode->conf; + + return max1363_write_basic_config(st->client, + st->setupbyte, + st->configbyte); +} + +static int max1363_read_single_chan(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + long m) +{ + int ret = 0; + s32 data; + u8 rxbuf[2]; + struct max1363_state *st = iio_priv(indio_dev); + struct i2c_client *client = st->client; + + mutex_lock(&indio_dev->mlock); + /* + * If monitor mode is enabled, the method for reading a single + * channel will have to be rather different and has not yet + * been implemented. + * + * Also, cannot read directly if buffered capture enabled. + */ + if (st->monitor_on || iio_buffer_enabled(indio_dev)) { + ret = -EBUSY; + goto error_ret; + } + + /* Check to see if current scan mode is correct */ + if (st->current_mode != &max1363_mode_table[chan->address]) { + /* Update scan mode if needed */ + st->current_mode = &max1363_mode_table[chan->address]; + ret = max1363_set_scan_mode(st); + if (ret < 0) + goto error_ret; + } + if (st->chip_info->bits != 8) { + /* Get reading */ + data = i2c_master_recv(client, rxbuf, 2); + if (data < 0) { + ret = data; + goto error_ret; + } + data = (rxbuf[1] | rxbuf[0] << 8) & + ((1 << st->chip_info->bits) - 1); + } else { + /* Get reading */ + data = i2c_master_recv(client, rxbuf, 1); + if (data < 0) { + ret = data; + goto error_ret; + } + data = rxbuf[0]; + } + *val = data; +error_ret: + mutex_unlock(&indio_dev->mlock); + return ret; + +} + +static int max1363_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + struct max1363_state *st = iio_priv(indio_dev); + int ret; + unsigned long scale_uv; + + switch (m) { + case IIO_CHAN_INFO_RAW: + ret = max1363_read_single_chan(indio_dev, chan, val, m); + if (ret < 0) + return ret; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + scale_uv = st->vref_uv >> st->chip_info->bits; + *val = scale_uv / 1000; + *val2 = (scale_uv % 1000) * 1000; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + return 0; +} + +/* Applies to max1363 */ +static const enum max1363_modes max1363_mode_list[] = { + _s0, _s1, _s2, _s3, + s0to1, s0to2, s0to3, + d0m1, d2m3, d1m0, d3m2, + d0m1to2m3, d1m0to3m2, +}; + +#define MAX1363_EV_M \ + (IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) \ + | IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING)) +#define MAX1363_INFO_MASK (IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT) +#define MAX1363_CHAN_U(num, addr, si, bits, evmask) \ + { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .channel = num, \ + .address = addr, \ + .info_mask = MAX1363_INFO_MASK, \ + .datasheet_name = "AIN"#num, \ + .scan_type = { \ + .sign = 'u', \ + .realbits = bits, \ + .storagebits = (bits > 8) ? 16 : 8, \ + .endianness = IIO_BE, \ + }, \ + .scan_index = si, \ + .event_mask = evmask, \ + } + +/* bipolar channel */ +#define MAX1363_CHAN_B(num, num2, addr, si, bits, evmask) \ + { \ + .type = IIO_VOLTAGE, \ + .differential = 1, \ + .indexed = 1, \ + .channel = num, \ + .channel2 = num2, \ + .address = addr, \ + .info_mask = MAX1363_INFO_MASK, \ + .datasheet_name = "AIN"#num"-AIN"#num2, \ + .scan_type = { \ + .sign = 's', \ + .realbits = bits, \ + .storagebits = (bits > 8) ? 16 : 8, \ + .endianness = IIO_BE, \ + }, \ + .scan_index = si, \ + .event_mask = evmask, \ + } + +#define MAX1363_4X_CHANS(bits, em) { \ + MAX1363_CHAN_U(0, _s0, 0, bits, em), \ + MAX1363_CHAN_U(1, _s1, 1, bits, em), \ + MAX1363_CHAN_U(2, _s2, 2, bits, em), \ + MAX1363_CHAN_U(3, _s3, 3, bits, em), \ + MAX1363_CHAN_B(0, 1, d0m1, 4, bits, em), \ + MAX1363_CHAN_B(2, 3, d2m3, 5, bits, em), \ + MAX1363_CHAN_B(1, 0, d1m0, 6, bits, em), \ + MAX1363_CHAN_B(3, 2, d3m2, 7, bits, em), \ + IIO_CHAN_SOFT_TIMESTAMP(8) \ + } + +static const struct iio_chan_spec max1036_channels[] = MAX1363_4X_CHANS(8, 0); +static const struct iio_chan_spec max1136_channels[] = MAX1363_4X_CHANS(10, 0); +static const struct iio_chan_spec max1236_channels[] = MAX1363_4X_CHANS(12, 0); +static const struct iio_chan_spec max1361_channels[] = + MAX1363_4X_CHANS(10, MAX1363_EV_M); +static const struct iio_chan_spec max1363_channels[] = + MAX1363_4X_CHANS(12, MAX1363_EV_M); + +/* Applies to max1236, max1237 */ +static const enum max1363_modes max1236_mode_list[] = { + _s0, _s1, _s2, _s3, + s0to1, s0to2, s0to3, + d0m1, d2m3, d1m0, d3m2, + d0m1to2m3, d1m0to3m2, + s2to3, +}; + +/* Applies to max1238, max1239 */ +static const enum max1363_modes max1238_mode_list[] = { + _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, _s8, _s9, _s10, _s11, + s0to1, s0to2, s0to3, s0to4, s0to5, s0to6, + s0to7, s0to8, s0to9, s0to10, s0to11, + d0m1, d2m3, d4m5, d6m7, d8m9, d10m11, + d1m0, d3m2, d5m4, d7m6, d9m8, d11m10, + d0m1to2m3, d0m1to4m5, d0m1to6m7, d0m1to8m9, d0m1to10m11, + d1m0to3m2, d1m0to5m4, d1m0to7m6, d1m0to9m8, d1m0to11m10, + s6to7, s6to8, s6to9, s6to10, s6to11, + d6m7to8m9, d6m7to10m11, d7m6to9m8, d7m6to11m10, +}; + +#define MAX1363_12X_CHANS(bits) { \ + MAX1363_CHAN_U(0, _s0, 0, bits, 0), \ + MAX1363_CHAN_U(1, _s1, 1, bits, 0), \ + MAX1363_CHAN_U(2, _s2, 2, bits, 0), \ + MAX1363_CHAN_U(3, _s3, 3, bits, 0), \ + MAX1363_CHAN_U(4, _s4, 4, bits, 0), \ + MAX1363_CHAN_U(5, _s5, 5, bits, 0), \ + MAX1363_CHAN_U(6, _s6, 6, bits, 0), \ + MAX1363_CHAN_U(7, _s7, 7, bits, 0), \ + MAX1363_CHAN_U(8, _s8, 8, bits, 0), \ + MAX1363_CHAN_U(9, _s9, 9, bits, 0), \ + MAX1363_CHAN_U(10, _s10, 10, bits, 0), \ + MAX1363_CHAN_U(11, _s11, 11, bits, 0), \ + MAX1363_CHAN_B(0, 1, d0m1, 12, bits, 0), \ + MAX1363_CHAN_B(2, 3, d2m3, 13, bits, 0), \ + MAX1363_CHAN_B(4, 5, d4m5, 14, bits, 0), \ + MAX1363_CHAN_B(6, 7, d6m7, 15, bits, 0), \ + MAX1363_CHAN_B(8, 9, d8m9, 16, bits, 0), \ + MAX1363_CHAN_B(10, 11, d10m11, 17, bits, 0), \ + MAX1363_CHAN_B(1, 0, d1m0, 18, bits, 0), \ + MAX1363_CHAN_B(3, 2, d3m2, 19, bits, 0), \ + MAX1363_CHAN_B(5, 4, d5m4, 20, bits, 0), \ + MAX1363_CHAN_B(7, 6, d7m6, 21, bits, 0), \ + MAX1363_CHAN_B(9, 8, d9m8, 22, bits, 0), \ + MAX1363_CHAN_B(11, 10, d11m10, 23, bits, 0), \ + IIO_CHAN_SOFT_TIMESTAMP(24) \ + } +static const struct iio_chan_spec max1038_channels[] = MAX1363_12X_CHANS(8); +static const struct iio_chan_spec max1138_channels[] = MAX1363_12X_CHANS(10); +static const struct iio_chan_spec max1238_channels[] = MAX1363_12X_CHANS(12); + +static const enum max1363_modes max11607_mode_list[] = { + _s0, _s1, _s2, _s3, + s0to1, s0to2, s0to3, + s2to3, + d0m1, d2m3, d1m0, d3m2, + d0m1to2m3, d1m0to3m2, +}; + +static const enum max1363_modes max11608_mode_list[] = { + _s0, _s1, _s2, _s3, _s4, _s5, _s6, _s7, + s0to1, s0to2, s0to3, s0to4, s0to5, s0to6, s0to7, + s6to7, + d0m1, d2m3, d4m5, d6m7, + d1m0, d3m2, d5m4, d7m6, + d0m1to2m3, d0m1to4m5, d0m1to6m7, + d1m0to3m2, d1m0to5m4, d1m0to7m6, +}; + +#define MAX1363_8X_CHANS(bits) { \ + MAX1363_CHAN_U(0, _s0, 0, bits, 0), \ + MAX1363_CHAN_U(1, _s1, 1, bits, 0), \ + MAX1363_CHAN_U(2, _s2, 2, bits, 0), \ + MAX1363_CHAN_U(3, _s3, 3, bits, 0), \ + MAX1363_CHAN_U(4, _s4, 4, bits, 0), \ + MAX1363_CHAN_U(5, _s5, 5, bits, 0), \ + MAX1363_CHAN_U(6, _s6, 6, bits, 0), \ + MAX1363_CHAN_U(7, _s7, 7, bits, 0), \ + MAX1363_CHAN_B(0, 1, d0m1, 8, bits, 0), \ + MAX1363_CHAN_B(2, 3, d2m3, 9, bits, 0), \ + MAX1363_CHAN_B(4, 5, d4m5, 10, bits, 0), \ + MAX1363_CHAN_B(6, 7, d6m7, 11, bits, 0), \ + MAX1363_CHAN_B(1, 0, d1m0, 12, bits, 0), \ + MAX1363_CHAN_B(3, 2, d3m2, 13, bits, 0), \ + MAX1363_CHAN_B(5, 4, d5m4, 14, bits, 0), \ + MAX1363_CHAN_B(7, 6, d7m6, 15, bits, 0), \ + IIO_CHAN_SOFT_TIMESTAMP(16) \ +} +static const struct iio_chan_spec max11602_channels[] = MAX1363_8X_CHANS(8); +static const struct iio_chan_spec max11608_channels[] = MAX1363_8X_CHANS(10); +static const struct iio_chan_spec max11614_channels[] = MAX1363_8X_CHANS(12); + +static const enum max1363_modes max11644_mode_list[] = { + _s0, _s1, s0to1, d0m1, d1m0, +}; + +#define MAX1363_2X_CHANS(bits) { \ + MAX1363_CHAN_U(0, _s0, 0, bits, 0), \ + MAX1363_CHAN_U(1, _s1, 1, bits, 0), \ + MAX1363_CHAN_B(0, 1, d0m1, 2, bits, 0), \ + MAX1363_CHAN_B(1, 0, d1m0, 3, bits, 0), \ + IIO_CHAN_SOFT_TIMESTAMP(4) \ + } + +static const struct iio_chan_spec max11646_channels[] = MAX1363_2X_CHANS(10); +static const struct iio_chan_spec max11644_channels[] = MAX1363_2X_CHANS(12); + +enum { max1361, + max1362, + max1363, + max1364, + max1036, + max1037, + max1038, + max1039, + max1136, + max1137, + max1138, + max1139, + max1236, + max1237, + max1238, + max1239, + max11600, + max11601, + max11602, + max11603, + max11604, + max11605, + max11606, + max11607, + max11608, + max11609, + max11610, + max11611, + max11612, + max11613, + max11614, + max11615, + max11616, + max11617, + max11644, + max11645, + max11646, + max11647 +}; + +static const int max1363_monitor_speeds[] = { 133000, 665000, 33300, 16600, + 8300, 4200, 2000, 1000 }; + +static ssize_t max1363_monitor_show_freq(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct max1363_state *st = iio_priv(dev_to_iio_dev(dev)); + return sprintf(buf, "%d\n", max1363_monitor_speeds[st->monitor_speed]); +} + +static ssize_t max1363_monitor_store_freq(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct max1363_state *st = iio_priv(indio_dev); + int i, ret; + unsigned long val; + bool found = false; + + ret = strict_strtoul(buf, 10, &val); + if (ret) + return -EINVAL; + for (i = 0; i < ARRAY_SIZE(max1363_monitor_speeds); i++) + if (val == max1363_monitor_speeds[i]) { + found = true; + break; + } + if (!found) + return -EINVAL; + + mutex_lock(&indio_dev->mlock); + st->monitor_speed = i; + mutex_unlock(&indio_dev->mlock); + + return 0; +} + +static IIO_DEV_ATTR_SAMP_FREQ(S_IRUGO | S_IWUSR, + max1363_monitor_show_freq, + max1363_monitor_store_freq); + +static IIO_CONST_ATTR(sampling_frequency_available, + "133000 665000 33300 16600 8300 4200 2000 1000"); + +static int max1363_read_thresh(struct iio_dev *indio_dev, + u64 event_code, + int *val) +{ + struct max1363_state *st = iio_priv(indio_dev); + if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING) + *val = st->thresh_low[IIO_EVENT_CODE_EXTRACT_CHAN(event_code)]; + else + *val = st->thresh_high[IIO_EVENT_CODE_EXTRACT_CHAN(event_code)]; + return 0; +} + +static int max1363_write_thresh(struct iio_dev *indio_dev, + u64 event_code, + int val) +{ + struct max1363_state *st = iio_priv(indio_dev); + /* make it handle signed correctly as well */ + switch (st->chip_info->bits) { + case 10: + if (val > 0x3FF) + return -EINVAL; + break; + case 12: + if (val > 0xFFF) + return -EINVAL; + break; + } + + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_FALLING: + st->thresh_low[IIO_EVENT_CODE_EXTRACT_CHAN(event_code)] = val; + break; + case IIO_EV_DIR_RISING: + st->thresh_high[IIO_EVENT_CODE_EXTRACT_CHAN(event_code)] = val; + break; + } + + return 0; +} + +static const u64 max1363_event_codes[] = { + IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 0, + IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), + IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 1, + IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), + IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 2, + IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), + IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 3, + IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING), + IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 0, + IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), + IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 1, + IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), + IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 2, + IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), + IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 3, + IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), +}; + +static irqreturn_t max1363_event_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct max1363_state *st = iio_priv(indio_dev); + s64 timestamp = iio_get_time_ns(); + unsigned long mask, loc; + u8 rx; + u8 tx[2] = { st->setupbyte, + MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0 }; + + i2c_master_recv(st->client, &rx, 1); + mask = rx; + for_each_set_bit(loc, &mask, 8) + iio_push_event(indio_dev, max1363_event_codes[loc], timestamp); + i2c_master_send(st->client, tx, 2); + + return IRQ_HANDLED; +} + +static int max1363_read_event_config(struct iio_dev *indio_dev, + u64 event_code) +{ + struct max1363_state *st = iio_priv(indio_dev); + int val; + int number = IIO_EVENT_CODE_EXTRACT_CHAN(event_code); + + mutex_lock(&indio_dev->mlock); + if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING) + val = (1 << number) & st->mask_low; + else + val = (1 << number) & st->mask_high; + mutex_unlock(&indio_dev->mlock); + + return val; +} + +static int max1363_monitor_mode_update(struct max1363_state *st, int enabled) +{ + u8 *tx_buf; + int ret, i = 3, j; + unsigned long numelements; + int len; + const long *modemask; + + if (!enabled) { + /* transition to buffered capture is not currently supported */ + st->setupbyte &= ~MAX1363_SETUP_MONITOR_SETUP; + st->configbyte &= ~MAX1363_SCAN_MASK; + st->monitor_on = false; + return max1363_write_basic_config(st->client, + st->setupbyte, + st->configbyte); + } + + /* Ensure we are in the relevant mode */ + st->setupbyte |= MAX1363_SETUP_MONITOR_SETUP; + st->configbyte &= ~(MAX1363_CHANNEL_SEL_MASK + | MAX1363_SCAN_MASK + | MAX1363_SE_DE_MASK); + st->configbyte |= MAX1363_CONFIG_SCAN_MONITOR_MODE; + if ((st->mask_low | st->mask_high) & 0x0F) { + st->configbyte |= max1363_mode_table[s0to3].conf; + modemask = max1363_mode_table[s0to3].modemask; + } else if ((st->mask_low | st->mask_high) & 0x30) { + st->configbyte |= max1363_mode_table[d0m1to2m3].conf; + modemask = max1363_mode_table[d0m1to2m3].modemask; + } else { + st->configbyte |= max1363_mode_table[d1m0to3m2].conf; + modemask = max1363_mode_table[d1m0to3m2].modemask; + } + numelements = bitmap_weight(modemask, MAX1363_MAX_CHANNELS); + len = 3 * numelements + 3; + tx_buf = kmalloc(len, GFP_KERNEL); + if (!tx_buf) { + ret = -ENOMEM; + goto error_ret; + } + tx_buf[0] = st->configbyte; + tx_buf[1] = st->setupbyte; + tx_buf[2] = (st->monitor_speed << 1); + + /* + * So we need to do yet another bit of nefarious scan mode + * setup to match what we need. + */ + for (j = 0; j < 8; j++) + if (test_bit(j, modemask)) { + /* Establish the mode is in the scan */ + if (st->mask_low & (1 << j)) { + tx_buf[i] = (st->thresh_low[j] >> 4) & 0xFF; + tx_buf[i + 1] = (st->thresh_low[j] << 4) & 0xF0; + } else if (j < 4) { + tx_buf[i] = 0; + tx_buf[i + 1] = 0; + } else { + tx_buf[i] = 0x80; + tx_buf[i + 1] = 0; + } + if (st->mask_high & (1 << j)) { + tx_buf[i + 1] |= + (st->thresh_high[j] >> 8) & 0x0F; + tx_buf[i + 2] = st->thresh_high[j] & 0xFF; + } else if (j < 4) { + tx_buf[i + 1] |= 0x0F; + tx_buf[i + 2] = 0xFF; + } else { + tx_buf[i + 1] |= 0x07; + tx_buf[i + 2] = 0xFF; + } + i += 3; + } + + + ret = i2c_master_send(st->client, tx_buf, len); + if (ret < 0) + goto error_ret; + if (ret != len) { + ret = -EIO; + goto error_ret; + } + + /* + * Now that we hopefully have sensible thresholds in place it is + * time to turn the interrupts on. + * It is unclear from the data sheet if this should be necessary + * (i.e. whether monitor mode setup is atomic) but it appears to + * be in practice. + */ + tx_buf[0] = st->setupbyte; + tx_buf[1] = MAX1363_MON_INT_ENABLE | (st->monitor_speed << 1) | 0xF0; + ret = i2c_master_send(st->client, tx_buf, 2); + if (ret < 0) + goto error_ret; + if (ret != 2) { + ret = -EIO; + goto error_ret; + } + ret = 0; + st->monitor_on = true; +error_ret: + + kfree(tx_buf); + + return ret; +} + +/* + * To keep this manageable we always use one of 3 scan modes. + * Scan 0...3, 0-1,2-3 and 1-0,3-2 + */ + +static inline int __max1363_check_event_mask(int thismask, int checkmask) +{ + int ret = 0; + /* Is it unipolar */ + if (thismask < 4) { + if (checkmask & ~0x0F) { + ret = -EBUSY; + goto error_ret; + } + } else if (thismask < 6) { + if (checkmask & ~0x30) { + ret = -EBUSY; + goto error_ret; + } + } else if (checkmask & ~0xC0) + ret = -EBUSY; +error_ret: + return ret; +} + +static int max1363_write_event_config(struct iio_dev *indio_dev, + u64 event_code, + int state) +{ + int ret = 0; + struct max1363_state *st = iio_priv(indio_dev); + u16 unifiedmask; + int number = IIO_EVENT_CODE_EXTRACT_CHAN(event_code); + + mutex_lock(&indio_dev->mlock); + unifiedmask = st->mask_low | st->mask_high; + if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING) { + + if (state == 0) + st->mask_low &= ~(1 << number); + else { + ret = __max1363_check_event_mask((1 << number), + unifiedmask); + if (ret) + goto error_ret; + st->mask_low |= (1 << number); + } + } else { + if (state == 0) + st->mask_high &= ~(1 << number); + else { + ret = __max1363_check_event_mask((1 << number), + unifiedmask); + if (ret) + goto error_ret; + st->mask_high |= (1 << number); + } + } + + max1363_monitor_mode_update(st, !!(st->mask_high | st->mask_low)); +error_ret: + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +/* + * As with scan_elements, only certain sets of these can + * be combined. + */ +static struct attribute *max1363_event_attributes[] = { + &iio_dev_attr_sampling_frequency.dev_attr.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + NULL, +}; + +static struct attribute_group max1363_event_attribute_group = { + .attrs = max1363_event_attributes, + .name = "events", +}; + +static int max1363_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *scan_mask) +{ + struct max1363_state *st = iio_priv(indio_dev); + + /* + * Need to figure out the current mode based upon the requested + * scan mask in iio_dev + */ + st->current_mode = max1363_match_mode(scan_mask, st->chip_info); + if (!st->current_mode) + return -EINVAL; + max1363_set_scan_mode(st); + return 0; +} + +static const struct iio_info max1238_info = { + .read_raw = &max1363_read_raw, + .driver_module = THIS_MODULE, + .update_scan_mode = &max1363_update_scan_mode, +}; + +static const struct iio_info max1363_info = { + .read_event_value = &max1363_read_thresh, + .write_event_value = &max1363_write_thresh, + .read_event_config = &max1363_read_event_config, + .write_event_config = &max1363_write_event_config, + .read_raw = &max1363_read_raw, + .update_scan_mode = &max1363_update_scan_mode, + .driver_module = THIS_MODULE, + .event_attrs = &max1363_event_attribute_group, +}; + +/* max1363 and max1368 tested - rest from data sheet */ +static const struct max1363_chip_info max1363_chip_info_tbl[] = { + [max1361] = { + .bits = 10, + .int_vref_mv = 2048, + .mode_list = max1363_mode_list, + .num_modes = ARRAY_SIZE(max1363_mode_list), + .default_mode = s0to3, + .channels = max1361_channels, + .num_channels = ARRAY_SIZE(max1361_channels), + .info = &max1363_info, + }, + [max1362] = { + .bits = 10, + .int_vref_mv = 4096, + .mode_list = max1363_mode_list, + .num_modes = ARRAY_SIZE(max1363_mode_list), + .default_mode = s0to3, + .channels = max1361_channels, + .num_channels = ARRAY_SIZE(max1361_channels), + .info = &max1363_info, + }, + [max1363] = { + .bits = 12, + .int_vref_mv = 2048, + .mode_list = max1363_mode_list, + .num_modes = ARRAY_SIZE(max1363_mode_list), + .default_mode = s0to3, + .channels = max1363_channels, + .num_channels = ARRAY_SIZE(max1363_channels), + .info = &max1363_info, + }, + [max1364] = { + .bits = 12, + .int_vref_mv = 4096, + .mode_list = max1363_mode_list, + .num_modes = ARRAY_SIZE(max1363_mode_list), + .default_mode = s0to3, + .channels = max1363_channels, + .num_channels = ARRAY_SIZE(max1363_channels), + .info = &max1363_info, + }, + [max1036] = { + .bits = 8, + .int_vref_mv = 4096, + .mode_list = max1236_mode_list, + .num_modes = ARRAY_SIZE(max1236_mode_list), + .default_mode = s0to3, + .info = &max1238_info, + .channels = max1036_channels, + .num_channels = ARRAY_SIZE(max1036_channels), + }, + [max1037] = { + .bits = 8, + .int_vref_mv = 2048, + .mode_list = max1236_mode_list, + .num_modes = ARRAY_SIZE(max1236_mode_list), + .default_mode = s0to3, + .info = &max1238_info, + .channels = max1036_channels, + .num_channels = ARRAY_SIZE(max1036_channels), + }, + [max1038] = { + .bits = 8, + .int_vref_mv = 4096, + .mode_list = max1238_mode_list, + .num_modes = ARRAY_SIZE(max1238_mode_list), + .default_mode = s0to11, + .info = &max1238_info, + .channels = max1038_channels, + .num_channels = ARRAY_SIZE(max1038_channels), + }, + [max1039] = { + .bits = 8, + .int_vref_mv = 2048, + .mode_list = max1238_mode_list, + .num_modes = ARRAY_SIZE(max1238_mode_list), + .default_mode = s0to11, + .info = &max1238_info, + .channels = max1038_channels, + .num_channels = ARRAY_SIZE(max1038_channels), + }, + [max1136] = { + .bits = 10, + .int_vref_mv = 4096, + .mode_list = max1236_mode_list, + .num_modes = ARRAY_SIZE(max1236_mode_list), + .default_mode = s0to3, + .info = &max1238_info, + .channels = max1136_channels, + .num_channels = ARRAY_SIZE(max1136_channels), + }, + [max1137] = { + .bits = 10, + .int_vref_mv = 2048, + .mode_list = max1236_mode_list, + .num_modes = ARRAY_SIZE(max1236_mode_list), + .default_mode = s0to3, + .info = &max1238_info, + .channels = max1136_channels, + .num_channels = ARRAY_SIZE(max1136_channels), + }, + [max1138] = { + .bits = 10, + .int_vref_mv = 4096, + .mode_list = max1238_mode_list, + .num_modes = ARRAY_SIZE(max1238_mode_list), + .default_mode = s0to11, + .info = &max1238_info, + .channels = max1138_channels, + .num_channels = ARRAY_SIZE(max1138_channels), + }, + [max1139] = { + .bits = 10, + .int_vref_mv = 2048, + .mode_list = max1238_mode_list, + .num_modes = ARRAY_SIZE(max1238_mode_list), + .default_mode = s0to11, + .info = &max1238_info, + .channels = max1138_channels, + .num_channels = ARRAY_SIZE(max1138_channels), + }, + [max1236] = { + .bits = 12, + .int_vref_mv = 4096, + .mode_list = max1236_mode_list, + .num_modes = ARRAY_SIZE(max1236_mode_list), + .default_mode = s0to3, + .info = &max1238_info, + .channels = max1236_channels, + .num_channels = ARRAY_SIZE(max1236_channels), + }, + [max1237] = { + .bits = 12, + .int_vref_mv = 2048, + .mode_list = max1236_mode_list, + .num_modes = ARRAY_SIZE(max1236_mode_list), + .default_mode = s0to3, + .info = &max1238_info, + .channels = max1236_channels, + .num_channels = ARRAY_SIZE(max1236_channels), + }, + [max1238] = { + .bits = 12, + .int_vref_mv = 4096, + .mode_list = max1238_mode_list, + .num_modes = ARRAY_SIZE(max1238_mode_list), + .default_mode = s0to11, + .info = &max1238_info, + .channels = max1238_channels, + .num_channels = ARRAY_SIZE(max1238_channels), + }, + [max1239] = { + .bits = 12, + .int_vref_mv = 2048, + .mode_list = max1238_mode_list, + .num_modes = ARRAY_SIZE(max1238_mode_list), + .default_mode = s0to11, + .info = &max1238_info, + .channels = max1238_channels, + .num_channels = ARRAY_SIZE(max1238_channels), + }, + [max11600] = { + .bits = 8, + .int_vref_mv = 4096, + .mode_list = max11607_mode_list, + .num_modes = ARRAY_SIZE(max11607_mode_list), + .default_mode = s0to3, + .info = &max1238_info, + .channels = max1036_channels, + .num_channels = ARRAY_SIZE(max1036_channels), + }, + [max11601] = { + .bits = 8, + .int_vref_mv = 2048, + .mode_list = max11607_mode_list, + .num_modes = ARRAY_SIZE(max11607_mode_list), + .default_mode = s0to3, + .info = &max1238_info, + .channels = max1036_channels, + .num_channels = ARRAY_SIZE(max1036_channels), + }, + [max11602] = { + .bits = 8, + .int_vref_mv = 4096, + .mode_list = max11608_mode_list, + .num_modes = ARRAY_SIZE(max11608_mode_list), + .default_mode = s0to7, + .info = &max1238_info, + .channels = max11602_channels, + .num_channels = ARRAY_SIZE(max11602_channels), + }, + [max11603] = { + .bits = 8, + .int_vref_mv = 2048, + .mode_list = max11608_mode_list, + .num_modes = ARRAY_SIZE(max11608_mode_list), + .default_mode = s0to7, + .info = &max1238_info, + .channels = max11602_channels, + .num_channels = ARRAY_SIZE(max11602_channels), + }, + [max11604] = { + .bits = 8, + .int_vref_mv = 4098, + .mode_list = max1238_mode_list, + .num_modes = ARRAY_SIZE(max1238_mode_list), + .default_mode = s0to11, + .info = &max1238_info, + .channels = max1238_channels, + .num_channels = ARRAY_SIZE(max1238_channels), + }, + [max11605] = { + .bits = 8, + .int_vref_mv = 2048, + .mode_list = max1238_mode_list, + .num_modes = ARRAY_SIZE(max1238_mode_list), + .default_mode = s0to11, + .info = &max1238_info, + .channels = max1238_channels, + .num_channels = ARRAY_SIZE(max1238_channels), + }, + [max11606] = { + .bits = 10, + .int_vref_mv = 4096, + .mode_list = max11607_mode_list, + .num_modes = ARRAY_SIZE(max11607_mode_list), + .default_mode = s0to3, + .info = &max1238_info, + .channels = max1136_channels, + .num_channels = ARRAY_SIZE(max1136_channels), + }, + [max11607] = { + .bits = 10, + .int_vref_mv = 2048, + .mode_list = max11607_mode_list, + .num_modes = ARRAY_SIZE(max11607_mode_list), + .default_mode = s0to3, + .info = &max1238_info, + .channels = max1136_channels, + .num_channels = ARRAY_SIZE(max1136_channels), + }, + [max11608] = { + .bits = 10, + .int_vref_mv = 4096, + .mode_list = max11608_mode_list, + .num_modes = ARRAY_SIZE(max11608_mode_list), + .default_mode = s0to7, + .info = &max1238_info, + .channels = max11608_channels, + .num_channels = ARRAY_SIZE(max11608_channels), + }, + [max11609] = { + .bits = 10, + .int_vref_mv = 2048, + .mode_list = max11608_mode_list, + .num_modes = ARRAY_SIZE(max11608_mode_list), + .default_mode = s0to7, + .info = &max1238_info, + .channels = max11608_channels, + .num_channels = ARRAY_SIZE(max11608_channels), + }, + [max11610] = { + .bits = 10, + .int_vref_mv = 4098, + .mode_list = max1238_mode_list, + .num_modes = ARRAY_SIZE(max1238_mode_list), + .default_mode = s0to11, + .info = &max1238_info, + .channels = max1238_channels, + .num_channels = ARRAY_SIZE(max1238_channels), + }, + [max11611] = { + .bits = 10, + .int_vref_mv = 2048, + .mode_list = max1238_mode_list, + .num_modes = ARRAY_SIZE(max1238_mode_list), + .default_mode = s0to11, + .info = &max1238_info, + .channels = max1238_channels, + .num_channels = ARRAY_SIZE(max1238_channels), + }, + [max11612] = { + .bits = 12, + .int_vref_mv = 4096, + .mode_list = max11607_mode_list, + .num_modes = ARRAY_SIZE(max11607_mode_list), + .default_mode = s0to3, + .info = &max1238_info, + .channels = max1363_channels, + .num_channels = ARRAY_SIZE(max1363_channels), + }, + [max11613] = { + .bits = 12, + .int_vref_mv = 2048, + .mode_list = max11607_mode_list, + .num_modes = ARRAY_SIZE(max11607_mode_list), + .default_mode = s0to3, + .info = &max1238_info, + .channels = max1363_channels, + .num_channels = ARRAY_SIZE(max1363_channels), + }, + [max11614] = { + .bits = 12, + .int_vref_mv = 4096, + .mode_list = max11608_mode_list, + .num_modes = ARRAY_SIZE(max11608_mode_list), + .default_mode = s0to7, + .info = &max1238_info, + .channels = max11614_channels, + .num_channels = ARRAY_SIZE(max11614_channels), + }, + [max11615] = { + .bits = 12, + .int_vref_mv = 2048, + .mode_list = max11608_mode_list, + .num_modes = ARRAY_SIZE(max11608_mode_list), + .default_mode = s0to7, + .info = &max1238_info, + .channels = max11614_channels, + .num_channels = ARRAY_SIZE(max11614_channels), + }, + [max11616] = { + .bits = 12, + .int_vref_mv = 4098, + .mode_list = max1238_mode_list, + .num_modes = ARRAY_SIZE(max1238_mode_list), + .default_mode = s0to11, + .info = &max1238_info, + .channels = max1238_channels, + .num_channels = ARRAY_SIZE(max1238_channels), + }, + [max11617] = { + .bits = 12, + .int_vref_mv = 2048, + .mode_list = max1238_mode_list, + .num_modes = ARRAY_SIZE(max1238_mode_list), + .default_mode = s0to11, + .info = &max1238_info, + .channels = max1238_channels, + .num_channels = ARRAY_SIZE(max1238_channels), + }, + [max11644] = { + .bits = 12, + .int_vref_mv = 2048, + .mode_list = max11644_mode_list, + .num_modes = ARRAY_SIZE(max11644_mode_list), + .default_mode = s0to1, + .info = &max1238_info, + .channels = max11644_channels, + .num_channels = ARRAY_SIZE(max11644_channels), + }, + [max11645] = { + .bits = 12, + .int_vref_mv = 4096, + .mode_list = max11644_mode_list, + .num_modes = ARRAY_SIZE(max11644_mode_list), + .default_mode = s0to1, + .info = &max1238_info, + .channels = max11644_channels, + .num_channels = ARRAY_SIZE(max11644_channels), + }, + [max11646] = { + .bits = 10, + .int_vref_mv = 2048, + .mode_list = max11644_mode_list, + .num_modes = ARRAY_SIZE(max11644_mode_list), + .default_mode = s0to1, + .info = &max1238_info, + .channels = max11646_channels, + .num_channels = ARRAY_SIZE(max11646_channels), + }, + [max11647] = { + .bits = 10, + .int_vref_mv = 4096, + .mode_list = max11644_mode_list, + .num_modes = ARRAY_SIZE(max11644_mode_list), + .default_mode = s0to1, + .info = &max1238_info, + .channels = max11646_channels, + .num_channels = ARRAY_SIZE(max11646_channels), + }, +}; + +static int max1363_initial_setup(struct max1363_state *st) +{ + st->setupbyte = MAX1363_SETUP_INT_CLOCK + | MAX1363_SETUP_UNIPOLAR + | MAX1363_SETUP_NORESET; + + if (st->vref) + st->setupbyte |= MAX1363_SETUP_AIN3_IS_REF_EXT_TO_REF; + else + st->setupbyte |= MAX1363_SETUP_POWER_UP_INT_REF + | MAX1363_SETUP_AIN3_IS_AIN3_REF_IS_INT; + + /* Set scan mode writes the config anyway so wait until then */ + st->setupbyte = MAX1363_SETUP_BYTE(st->setupbyte); + st->current_mode = &max1363_mode_table[st->chip_info->default_mode]; + st->configbyte = MAX1363_CONFIG_BYTE(st->configbyte); + + return max1363_set_scan_mode(st); +} + +static int max1363_alloc_scan_masks(struct iio_dev *indio_dev) +{ + struct max1363_state *st = iio_priv(indio_dev); + unsigned long *masks; + int i; + + masks = devm_kzalloc(&indio_dev->dev, + BITS_TO_LONGS(MAX1363_MAX_CHANNELS) * sizeof(long) * + (st->chip_info->num_modes + 1), GFP_KERNEL); + if (!masks) + return -ENOMEM; + + for (i = 0; i < st->chip_info->num_modes; i++) + bitmap_copy(masks + BITS_TO_LONGS(MAX1363_MAX_CHANNELS)*i, + max1363_mode_table[st->chip_info->mode_list[i]] + .modemask, MAX1363_MAX_CHANNELS); + + indio_dev->available_scan_masks = masks; + + return 0; +} + +static irqreturn_t max1363_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct max1363_state *st = iio_priv(indio_dev); + s64 time_ns; + __u8 *rxbuf; + int b_sent; + size_t d_size; + unsigned long numvals = bitmap_weight(st->current_mode->modemask, + MAX1363_MAX_CHANNELS); + + /* Ensure the timestamp is 8 byte aligned */ + if (st->chip_info->bits != 8) + d_size = numvals*2; + else + d_size = numvals; + if (indio_dev->scan_timestamp) { + d_size += sizeof(s64); + if (d_size % sizeof(s64)) + d_size += sizeof(s64) - (d_size % sizeof(s64)); + } + /* Monitor mode prevents reading. Whilst not currently implemented + * might as well have this test in here in the meantime as it does + * no harm. + */ + if (numvals == 0) + goto done; + + rxbuf = kmalloc(d_size, GFP_KERNEL); + if (rxbuf == NULL) + goto done; + if (st->chip_info->bits != 8) + b_sent = i2c_master_recv(st->client, rxbuf, numvals*2); + else + b_sent = i2c_master_recv(st->client, rxbuf, numvals); + if (b_sent < 0) + goto done_free; + + time_ns = iio_get_time_ns(); + + if (indio_dev->scan_timestamp) + memcpy(rxbuf + d_size - sizeof(s64), &time_ns, sizeof(time_ns)); + iio_push_to_buffers(indio_dev, rxbuf); + +done_free: + kfree(rxbuf); +done: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static const struct iio_buffer_setup_ops max1363_buffered_setup_ops = { + .postenable = &iio_triggered_buffer_postenable, + .preenable = &iio_sw_buffer_preenable, + .predisable = &iio_triggered_buffer_predisable, +}; + +static int max1363_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct max1363_state *st; + struct iio_dev *indio_dev; + struct regulator *vref; + + indio_dev = iio_device_alloc(sizeof(struct max1363_state)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_out; + } + + indio_dev->dev.of_node = client->dev.of_node; + ret = iio_map_array_register(indio_dev, client->dev.platform_data); + if (ret < 0) + goto error_free_device; + + st = iio_priv(indio_dev); + + st->reg = devm_regulator_get(&client->dev, "vcc"); + if (IS_ERR(st->reg)) { + ret = PTR_ERR(st->reg); + goto error_unregister_map; + } + + ret = regulator_enable(st->reg); + if (ret) + goto error_unregister_map; + + /* this is only used for device removal purposes */ + i2c_set_clientdata(client, indio_dev); + + st->chip_info = &max1363_chip_info_tbl[id->driver_data]; + st->client = client; + + st->vref_uv = st->chip_info->int_vref_mv * 1000; + vref = devm_regulator_get(&client->dev, "vref"); + if (!IS_ERR(vref)) { + int vref_uv; + + ret = regulator_enable(vref); + if (ret) + goto error_disable_reg; + st->vref = vref; + vref_uv = regulator_get_voltage(vref); + if (vref_uv <= 0) { + ret = -EINVAL; + goto error_disable_reg; + } + st->vref_uv = vref_uv; + } + + ret = max1363_alloc_scan_masks(indio_dev); + if (ret) + goto error_disable_reg; + + /* Establish that the iio_dev is a child of the i2c device */ + indio_dev->dev.parent = &client->dev; + indio_dev->name = id->name; + indio_dev->channels = st->chip_info->channels; + indio_dev->num_channels = st->chip_info->num_channels; + indio_dev->info = st->chip_info->info; + indio_dev->modes = INDIO_DIRECT_MODE; + ret = max1363_initial_setup(st); + if (ret < 0) + goto error_disable_reg; + + ret = iio_triggered_buffer_setup(indio_dev, NULL, + &max1363_trigger_handler, &max1363_buffered_setup_ops); + if (ret) + goto error_disable_reg; + + if (client->irq) { + ret = devm_request_threaded_irq(&client->dev, st->client->irq, + NULL, + &max1363_event_handler, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "max1363_event", + indio_dev); + + if (ret) + goto error_uninit_buffer; + } + + ret = iio_device_register(indio_dev); + if (ret < 0) + goto error_uninit_buffer; + + return 0; + +error_uninit_buffer: + iio_triggered_buffer_cleanup(indio_dev); +error_disable_reg: + if (st->vref) + regulator_disable(st->vref); + regulator_disable(st->reg); +error_unregister_map: + iio_map_array_unregister(indio_dev); +error_free_device: + iio_device_free(indio_dev); +error_out: + return ret; +} + +static int max1363_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct max1363_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + if (st->vref) + regulator_disable(st->vref); + regulator_disable(st->reg); + iio_map_array_unregister(indio_dev); + iio_device_free(indio_dev); + + return 0; +} + +static const struct i2c_device_id max1363_id[] = { + { "max1361", max1361 }, + { "max1362", max1362 }, + { "max1363", max1363 }, + { "max1364", max1364 }, + { "max1036", max1036 }, + { "max1037", max1037 }, + { "max1038", max1038 }, + { "max1039", max1039 }, + { "max1136", max1136 }, + { "max1137", max1137 }, + { "max1138", max1138 }, + { "max1139", max1139 }, + { "max1236", max1236 }, + { "max1237", max1237 }, + { "max1238", max1238 }, + { "max1239", max1239 }, + { "max11600", max11600 }, + { "max11601", max11601 }, + { "max11602", max11602 }, + { "max11603", max11603 }, + { "max11604", max11604 }, + { "max11605", max11605 }, + { "max11606", max11606 }, + { "max11607", max11607 }, + { "max11608", max11608 }, + { "max11609", max11609 }, + { "max11610", max11610 }, + { "max11611", max11611 }, + { "max11612", max11612 }, + { "max11613", max11613 }, + { "max11614", max11614 }, + { "max11615", max11615 }, + { "max11616", max11616 }, + { "max11617", max11617 }, + {} +}; + +MODULE_DEVICE_TABLE(i2c, max1363_id); + +static struct i2c_driver max1363_driver = { + .driver = { + .name = "max1363", + }, + .probe = max1363_probe, + .remove = max1363_remove, + .id_table = max1363_id, +}; +module_i2c_driver(max1363_driver); + +MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>"); +MODULE_DESCRIPTION("Maxim 1363 ADC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/adc/ti-adc081c.c b/drivers/iio/adc/ti-adc081c.c new file mode 100644 index 000000000000..f4a46dd8f43b --- /dev/null +++ b/drivers/iio/adc/ti-adc081c.c @@ -0,0 +1,161 @@ +/* + * Copyright (C) 2012 Avionic Design GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/regulator/consumer.h> + +struct adc081c { + struct i2c_client *i2c; + struct regulator *ref; +}; + +#define REG_CONV_RES 0x00 + +static int adc081c_read_raw(struct iio_dev *iio, + struct iio_chan_spec const *channel, int *value, + int *shift, long mask) +{ + struct adc081c *adc = iio_priv(iio); + int err; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + err = i2c_smbus_read_word_swapped(adc->i2c, REG_CONV_RES); + if (err < 0) + return err; + + *value = (err >> 4) & 0xff; + return IIO_VAL_INT; + + case IIO_CHAN_INFO_SCALE: + err = regulator_get_voltage(adc->ref); + if (err < 0) + return err; + + *value = err / 1000; + *shift = 8; + + return IIO_VAL_FRACTIONAL_LOG2; + + default: + break; + } + + return -EINVAL; +} + +static const struct iio_chan_spec adc081c_channel = { + .type = IIO_VOLTAGE, + .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_RAW_SEPARATE_BIT, +}; + +static const struct iio_info adc081c_info = { + .read_raw = adc081c_read_raw, + .driver_module = THIS_MODULE, +}; + +static int adc081c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct iio_dev *iio; + struct adc081c *adc; + int err; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) + return -ENODEV; + + iio = iio_device_alloc(sizeof(*adc)); + if (!iio) + return -ENOMEM; + + adc = iio_priv(iio); + adc->i2c = client; + + adc->ref = regulator_get(&client->dev, "vref"); + if (IS_ERR(adc->ref)) { + err = PTR_ERR(adc->ref); + goto iio_free; + } + + err = regulator_enable(adc->ref); + if (err < 0) + goto regulator_put; + + iio->dev.parent = &client->dev; + iio->name = dev_name(&client->dev); + iio->modes = INDIO_DIRECT_MODE; + iio->info = &adc081c_info; + + iio->channels = &adc081c_channel; + iio->num_channels = 1; + + err = iio_device_register(iio); + if (err < 0) + goto regulator_disable; + + i2c_set_clientdata(client, iio); + + return 0; + +regulator_disable: + regulator_disable(adc->ref); +regulator_put: + regulator_put(adc->ref); +iio_free: + iio_device_free(iio); + + return err; +} + +static int adc081c_remove(struct i2c_client *client) +{ + struct iio_dev *iio = i2c_get_clientdata(client); + struct adc081c *adc = iio_priv(iio); + + iio_device_unregister(iio); + regulator_disable(adc->ref); + regulator_put(adc->ref); + iio_device_free(iio); + + return 0; +} + +static const struct i2c_device_id adc081c_id[] = { + { "adc081c", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, adc081c_id); + +#ifdef CONFIG_OF +static const struct of_device_id adc081c_of_match[] = { + { .compatible = "ti,adc081c" }, + { } +}; +MODULE_DEVICE_TABLE(of, adc081c_of_match); +#endif + +static struct i2c_driver adc081c_driver = { + .driver = { + .name = "adc081c", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(adc081c_of_match), + }, + .probe = adc081c_probe, + .remove = adc081c_remove, + .id_table = adc081c_id, +}; +module_i2c_driver(adc081c_driver); + +MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>"); +MODULE_DESCRIPTION("Texas Instruments ADC081C021/027 driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c new file mode 100644 index 000000000000..cd030e100c39 --- /dev/null +++ b/drivers/iio/adc/ti_am335x_adc.c @@ -0,0 +1,260 @@ +/* + * TI ADC MFD driver + * + * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/ + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/iio/iio.h> + +#include <linux/mfd/ti_am335x_tscadc.h> +#include <linux/platform_data/ti_am335x_adc.h> + +struct tiadc_device { + struct ti_tscadc_dev *mfd_tscadc; + int channels; +}; + +static unsigned int tiadc_readl(struct tiadc_device *adc, unsigned int reg) +{ + return readl(adc->mfd_tscadc->tscadc_base + reg); +} + +static void tiadc_writel(struct tiadc_device *adc, unsigned int reg, + unsigned int val) +{ + writel(val, adc->mfd_tscadc->tscadc_base + reg); +} + +static void tiadc_step_config(struct tiadc_device *adc_dev) +{ + unsigned int stepconfig; + int i, channels = 0, steps; + + /* + * There are 16 configurable steps and 8 analog input + * lines available which are shared between Touchscreen and ADC. + * + * Steps backwards i.e. from 16 towards 0 are used by ADC + * depending on number of input lines needed. + * Channel would represent which analog input + * needs to be given to ADC to digitalize data. + */ + + steps = TOTAL_STEPS - adc_dev->channels; + channels = TOTAL_CHANNELS - adc_dev->channels; + + stepconfig = STEPCONFIG_AVG_16 | STEPCONFIG_FIFO1; + + for (i = (steps + 1); i <= TOTAL_STEPS; i++) { + tiadc_writel(adc_dev, REG_STEPCONFIG(i), + stepconfig | STEPCONFIG_INP(channels)); + tiadc_writel(adc_dev, REG_STEPDELAY(i), + STEPCONFIG_OPENDLY); + channels++; + } + tiadc_writel(adc_dev, REG_SE, STPENB_STEPENB); +} + +static int tiadc_channel_init(struct iio_dev *indio_dev, int channels) +{ + struct iio_chan_spec *chan_array; + int i; + + indio_dev->num_channels = channels; + chan_array = kcalloc(indio_dev->num_channels, + sizeof(struct iio_chan_spec), GFP_KERNEL); + + if (chan_array == NULL) + return -ENOMEM; + + for (i = 0; i < (indio_dev->num_channels); i++) { + struct iio_chan_spec *chan = chan_array + i; + chan->type = IIO_VOLTAGE; + chan->indexed = 1; + chan->channel = i; + chan->info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT; + } + + indio_dev->channels = chan_array; + + return indio_dev->num_channels; +} + +static void tiadc_channels_remove(struct iio_dev *indio_dev) +{ + kfree(indio_dev->channels); +} + +static int tiadc_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct tiadc_device *adc_dev = iio_priv(indio_dev); + int i; + unsigned int fifo1count, readx1; + + /* + * When the sub-system is first enabled, + * the sequencer will always start with the + * lowest step (1) and continue until step (16). + * For ex: If we have enabled 4 ADC channels and + * currently use only 1 out of them, the + * sequencer still configures all the 4 steps, + * leading to 3 unwanted data. + * Hence we need to flush out this data. + */ + + fifo1count = tiadc_readl(adc_dev, REG_FIFO1CNT); + for (i = 0; i < fifo1count; i++) { + readx1 = tiadc_readl(adc_dev, REG_FIFO1); + if (i == chan->channel) + *val = readx1 & 0xfff; + } + tiadc_writel(adc_dev, REG_SE, STPENB_STEPENB); + + return IIO_VAL_INT; +} + +static const struct iio_info tiadc_info = { + .read_raw = &tiadc_read_raw, +}; + +static int tiadc_probe(struct platform_device *pdev) +{ + struct iio_dev *indio_dev; + struct tiadc_device *adc_dev; + struct ti_tscadc_dev *tscadc_dev = pdev->dev.platform_data; + struct mfd_tscadc_board *pdata; + int err; + + pdata = tscadc_dev->dev->platform_data; + if (!pdata || !pdata->adc_init) { + dev_err(&pdev->dev, "Could not find platform data\n"); + return -EINVAL; + } + + indio_dev = iio_device_alloc(sizeof(struct tiadc_device)); + if (indio_dev == NULL) { + dev_err(&pdev->dev, "failed to allocate iio device\n"); + err = -ENOMEM; + goto err_ret; + } + adc_dev = iio_priv(indio_dev); + + adc_dev->mfd_tscadc = tscadc_dev; + adc_dev->channels = pdata->adc_init->adc_channels; + + indio_dev->dev.parent = &pdev->dev; + indio_dev->name = dev_name(&pdev->dev); + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &tiadc_info; + + tiadc_step_config(adc_dev); + + err = tiadc_channel_init(indio_dev, adc_dev->channels); + if (err < 0) + goto err_free_device; + + err = iio_device_register(indio_dev); + if (err) + goto err_free_channels; + + platform_set_drvdata(pdev, indio_dev); + + return 0; + +err_free_channels: + tiadc_channels_remove(indio_dev); +err_free_device: + iio_device_free(indio_dev); +err_ret: + return err; +} + +static int tiadc_remove(struct platform_device *pdev) +{ + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + + iio_device_unregister(indio_dev); + tiadc_channels_remove(indio_dev); + + iio_device_free(indio_dev); + + return 0; +} + +#ifdef CONFIG_PM +static int tiadc_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tiadc_device *adc_dev = iio_priv(indio_dev); + struct ti_tscadc_dev *tscadc_dev = dev->platform_data; + unsigned int idle; + + if (!device_may_wakeup(tscadc_dev->dev)) { + idle = tiadc_readl(adc_dev, REG_CTRL); + idle &= ~(CNTRLREG_TSCSSENB); + tiadc_writel(adc_dev, REG_CTRL, (idle | + CNTRLREG_POWERDOWN)); + } + + return 0; +} + +static int tiadc_resume(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tiadc_device *adc_dev = iio_priv(indio_dev); + unsigned int restore; + + /* Make sure ADC is powered up */ + restore = tiadc_readl(adc_dev, REG_CTRL); + restore &= ~(CNTRLREG_POWERDOWN); + tiadc_writel(adc_dev, REG_CTRL, restore); + + tiadc_step_config(adc_dev); + + return 0; +} + +static const struct dev_pm_ops tiadc_pm_ops = { + .suspend = tiadc_suspend, + .resume = tiadc_resume, +}; +#define TIADC_PM_OPS (&tiadc_pm_ops) +#else +#define TIADC_PM_OPS NULL +#endif + +static struct platform_driver tiadc_driver = { + .driver = { + .name = "tiadc", + .owner = THIS_MODULE, + .pm = TIADC_PM_OPS, + }, + .probe = tiadc_probe, + .remove = tiadc_remove, +}; + +module_platform_driver(tiadc_driver); + +MODULE_DESCRIPTION("TI ADC controller driver"); +MODULE_AUTHOR("Rachna Patil <rachna@ti.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/adc/viperboard_adc.c b/drivers/iio/adc/viperboard_adc.c new file mode 100644 index 000000000000..ad0261533dee --- /dev/null +++ b/drivers/iio/adc/viperboard_adc.c @@ -0,0 +1,181 @@ +/* + * Nano River Technologies viperboard IIO ADC driver + * + * (C) 2012 by Lemonage GmbH + * Author: Lars Poeschel <poeschel@lemonage.de> + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/mutex.h> +#include <linux/platform_device.h> + +#include <linux/usb.h> +#include <linux/iio/iio.h> + +#include <linux/mfd/viperboard.h> + +#define VPRBRD_ADC_CMD_GET 0x00 + +struct vprbrd_adc_msg { + u8 cmd; + u8 chan; + u8 val; +} __packed; + +struct vprbrd_adc { + struct vprbrd *vb; +}; + +#define VPRBRD_ADC_CHANNEL(_index) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .channel = _index, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, \ + .scan_index = _index, \ + .scan_type = { \ + .sign = 'u', \ + .realbits = 8, \ + .storagebits = 8, \ + }, \ +} + +static struct iio_chan_spec const vprbrd_adc_iio_channels[] = { + VPRBRD_ADC_CHANNEL(0), + VPRBRD_ADC_CHANNEL(1), + VPRBRD_ADC_CHANNEL(2), + VPRBRD_ADC_CHANNEL(3), +}; + +static int vprbrd_iio_read_raw(struct iio_dev *iio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long info) +{ + int ret, error = 0; + struct vprbrd_adc *adc = iio_priv(iio_dev); + struct vprbrd *vb = adc->vb; + struct vprbrd_adc_msg *admsg = (struct vprbrd_adc_msg *)vb->buf; + + switch (info) { + case IIO_CHAN_INFO_RAW: + mutex_lock(&vb->lock); + + admsg->cmd = VPRBRD_ADC_CMD_GET; + admsg->chan = chan->scan_index; + admsg->val = 0x00; + + ret = usb_control_msg(vb->usb_dev, + usb_sndctrlpipe(vb->usb_dev, 0), VPRBRD_USB_REQUEST_ADC, + VPRBRD_USB_TYPE_OUT, 0x0000, 0x0000, admsg, + sizeof(struct vprbrd_adc_msg), VPRBRD_USB_TIMEOUT_MS); + if (ret != sizeof(struct vprbrd_adc_msg)) { + dev_err(&iio_dev->dev, "usb send error on adc read\n"); + error = -EREMOTEIO; + } + + ret = usb_control_msg(vb->usb_dev, + usb_rcvctrlpipe(vb->usb_dev, 0), VPRBRD_USB_REQUEST_ADC, + VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, admsg, + sizeof(struct vprbrd_adc_msg), VPRBRD_USB_TIMEOUT_MS); + + *val = admsg->val; + + mutex_unlock(&vb->lock); + + if (ret != sizeof(struct vprbrd_adc_msg)) { + dev_err(&iio_dev->dev, "usb recv error on adc read\n"); + error = -EREMOTEIO; + } + + if (error) + goto error; + + return IIO_VAL_INT; + default: + error = -EINVAL; + break; + } +error: + return error; +} + +static const struct iio_info vprbrd_adc_iio_info = { + .read_raw = &vprbrd_iio_read_raw, + .driver_module = THIS_MODULE, +}; + +static int vprbrd_adc_probe(struct platform_device *pdev) +{ + struct vprbrd *vb = dev_get_drvdata(pdev->dev.parent); + struct vprbrd_adc *adc; + struct iio_dev *indio_dev; + int ret; + + /* registering iio */ + indio_dev = iio_device_alloc(sizeof(*adc)); + if (!indio_dev) { + dev_err(&pdev->dev, "failed allocating iio device\n"); + return -ENOMEM; + } + + adc = iio_priv(indio_dev); + adc->vb = vb; + indio_dev->name = "viperboard adc"; + indio_dev->dev.parent = &pdev->dev; + indio_dev->info = &vprbrd_adc_iio_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = vprbrd_adc_iio_channels; + indio_dev->num_channels = ARRAY_SIZE(vprbrd_adc_iio_channels); + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&pdev->dev, "could not register iio (adc)"); + goto error; + } + + platform_set_drvdata(pdev, indio_dev); + + return 0; + +error: + iio_device_free(indio_dev); + return ret; +} + +static int vprbrd_adc_remove(struct platform_device *pdev) +{ + struct iio_dev *indio_dev = platform_get_drvdata(pdev); + + iio_device_unregister(indio_dev); + iio_device_free(indio_dev); + + return 0; +} + +static struct platform_driver vprbrd_adc_driver = { + .driver = { + .name = "viperboard-adc", + .owner = THIS_MODULE, + }, + .probe = vprbrd_adc_probe, + .remove = vprbrd_adc_remove, +}; + +module_platform_driver(vprbrd_adc_driver); + +MODULE_AUTHOR("Lars Poeschel <poeschel@lemonage.de>"); +MODULE_DESCRIPTION("IIO ADC driver for Nano River Techs Viperboard"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:viperboard-adc"); diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c index d8281cdbfc4a..d6c0af23a2a7 100644 --- a/drivers/iio/amplifiers/ad8366.c +++ b/drivers/iio/amplifiers/ad8366.c @@ -133,7 +133,7 @@ static const struct iio_chan_spec ad8366_channels[] = { AD8366_CHAN(1), }; -static int __devinit ad8366_probe(struct spi_device *spi) +static int ad8366_probe(struct spi_device *spi) { struct iio_dev *indio_dev; struct ad8366_state *st; @@ -182,7 +182,7 @@ error_put_reg: return ret; } -static int __devexit ad8366_remove(struct spi_device *spi) +static int ad8366_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad8366_state *st = iio_priv(indio_dev); @@ -211,7 +211,7 @@ static struct spi_driver ad8366_driver = { .owner = THIS_MODULE, }, .probe = ad8366_probe, - .remove = __devexit_p(ad8366_remove), + .remove = ad8366_remove, .id_table = ad8366_id, }; diff --git a/drivers/iio/buffer_cb.c b/drivers/iio/buffer_cb.c new file mode 100644 index 000000000000..9201022945e9 --- /dev/null +++ b/drivers/iio/buffer_cb.c @@ -0,0 +1,113 @@ +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/err.h> +#include <linux/export.h> +#include <linux/iio/buffer.h> +#include <linux/iio/consumer.h> + +struct iio_cb_buffer { + struct iio_buffer buffer; + int (*cb)(u8 *data, void *private); + void *private; + struct iio_channel *channels; +}; + +static int iio_buffer_cb_store_to(struct iio_buffer *buffer, u8 *data) +{ + struct iio_cb_buffer *cb_buff = container_of(buffer, + struct iio_cb_buffer, + buffer); + + return cb_buff->cb(data, cb_buff->private); +} + +static struct iio_buffer_access_funcs iio_cb_access = { + .store_to = &iio_buffer_cb_store_to, +}; + +struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, + int (*cb)(u8 *data, + void *private), + void *private) +{ + int ret; + struct iio_cb_buffer *cb_buff; + struct iio_dev *indio_dev; + struct iio_channel *chan; + + cb_buff = kzalloc(sizeof(*cb_buff), GFP_KERNEL); + if (cb_buff == NULL) { + ret = -ENOMEM; + goto error_ret; + } + + cb_buff->private = private; + cb_buff->cb = cb; + cb_buff->buffer.access = &iio_cb_access; + INIT_LIST_HEAD(&cb_buff->buffer.demux_list); + + cb_buff->channels = iio_channel_get_all(dev); + if (IS_ERR(cb_buff->channels)) { + ret = PTR_ERR(cb_buff->channels); + goto error_free_cb_buff; + } + + indio_dev = cb_buff->channels[0].indio_dev; + cb_buff->buffer.scan_mask + = kcalloc(BITS_TO_LONGS(indio_dev->masklength), sizeof(long), + GFP_KERNEL); + if (cb_buff->buffer.scan_mask == NULL) { + ret = -ENOMEM; + goto error_release_channels; + } + chan = &cb_buff->channels[0]; + while (chan->indio_dev) { + if (chan->indio_dev != indio_dev) { + ret = -EINVAL; + goto error_release_channels; + } + set_bit(chan->channel->scan_index, + cb_buff->buffer.scan_mask); + chan++; + } + + return cb_buff; + +error_release_channels: + iio_channel_release_all(cb_buff->channels); +error_free_cb_buff: + kfree(cb_buff); +error_ret: + return ERR_PTR(ret); +} +EXPORT_SYMBOL_GPL(iio_channel_get_all_cb); + +int iio_channel_start_all_cb(struct iio_cb_buffer *cb_buff) +{ + return iio_update_buffers(cb_buff->channels[0].indio_dev, + &cb_buff->buffer, + NULL); +} +EXPORT_SYMBOL_GPL(iio_channel_start_all_cb); + +void iio_channel_stop_all_cb(struct iio_cb_buffer *cb_buff) +{ + iio_update_buffers(cb_buff->channels[0].indio_dev, + NULL, + &cb_buff->buffer); +} +EXPORT_SYMBOL_GPL(iio_channel_stop_all_cb); + +void iio_channel_release_all_cb(struct iio_cb_buffer *cb_buff) +{ + iio_channel_release_all(cb_buff->channels); + kfree(cb_buff); +} +EXPORT_SYMBOL_GPL(iio_channel_release_all_cb); + +struct iio_channel +*iio_channel_cb_get_channels(const struct iio_cb_buffer *cb_buffer) +{ + return cb_buffer->channels; +} +EXPORT_SYMBOL_GPL(iio_channel_cb_get_channels); diff --git a/drivers/iio/common/Kconfig b/drivers/iio/common/Kconfig index ed45ee54500c..0b6e97d18fa0 100644 --- a/drivers/iio/common/Kconfig +++ b/drivers/iio/common/Kconfig @@ -3,3 +3,4 @@ # source "drivers/iio/common/hid-sensors/Kconfig" +source "drivers/iio/common/st_sensors/Kconfig" diff --git a/drivers/iio/common/Makefile b/drivers/iio/common/Makefile index 81584009b21b..c2352beb5d97 100644 --- a/drivers/iio/common/Makefile +++ b/drivers/iio/common/Makefile @@ -7,3 +7,4 @@ # obj-y += hid-sensors/ +obj-y += st_sensors/ diff --git a/drivers/iio/common/hid-sensors/Kconfig b/drivers/iio/common/hid-sensors/Kconfig index 8e63d81d652a..1178121b55b0 100644 --- a/drivers/iio/common/hid-sensors/Kconfig +++ b/drivers/iio/common/hid-sensors/Kconfig @@ -6,7 +6,7 @@ menu "Hid Sensor IIO Common" config HID_SENSOR_IIO_COMMON tristate "Common modules for all HID Sensor IIO drivers" depends on HID_SENSOR_HUB - select IIO_TRIGGER if IIO_BUFFER + select HID_SENSOR_IIO_TRIGGER if IIO_BUFFER help Say yes here to build support for HID sensor to use HID sensor common processing for attributes and IIO triggers. @@ -14,8 +14,19 @@ config HID_SENSOR_IIO_COMMON HID sensor drivers, this module contains processing for those attributes. +config HID_SENSOR_IIO_TRIGGER + tristate "Common module (trigger) for all HID Sensor IIO drivers" + depends on HID_SENSOR_HUB && HID_SENSOR_IIO_COMMON + select IIO_TRIGGER + help + Say yes here to build trigger support for HID sensors. + Triggers will be send if all requested attributes were read. + + If this driver is compiled as a module, it will be named + hid-sensor-trigger. + config HID_SENSOR_ENUM_BASE_QUIRKS - tristate "ENUM base quirks for HID Sensor IIO drivers" + bool "ENUM base quirks for HID Sensor IIO drivers" depends on HID_SENSOR_IIO_COMMON help Say yes here to build support for sensor hub FW using diff --git a/drivers/iio/common/hid-sensors/Makefile b/drivers/iio/common/hid-sensors/Makefile index 1f463e00c242..22e7c5a82325 100644 --- a/drivers/iio/common/hid-sensors/Makefile +++ b/drivers/iio/common/hid-sensors/Makefile @@ -3,4 +3,5 @@ # obj-$(CONFIG_HID_SENSOR_IIO_COMMON) += hid-sensor-iio-common.o -hid-sensor-iio-common-y := hid-sensor-attributes.o hid-sensor-trigger.o +obj-$(CONFIG_HID_SENSOR_IIO_TRIGGER) += hid-sensor-trigger.o +hid-sensor-iio-common-y := hid-sensor-attributes.o diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c index 75374955caba..75b54730a963 100644 --- a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c +++ b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c @@ -25,7 +25,6 @@ #include <linux/hid-sensor-hub.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> -#include "hid-sensor-attributes.h" static int pow_10(unsigned power) { @@ -114,7 +113,7 @@ static u32 convert_to_vtf_format(int size, int exp, int val1, int val2) return value; } -int hid_sensor_read_samp_freq_value(struct hid_sensor_iio_common *st, +int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st, int *val1, int *val2) { s32 value; @@ -141,7 +140,7 @@ int hid_sensor_read_samp_freq_value(struct hid_sensor_iio_common *st, } EXPORT_SYMBOL(hid_sensor_read_samp_freq_value); -int hid_sensor_write_samp_freq_value(struct hid_sensor_iio_common *st, +int hid_sensor_write_samp_freq_value(struct hid_sensor_common *st, int val1, int val2) { s32 value; @@ -169,7 +168,7 @@ int hid_sensor_write_samp_freq_value(struct hid_sensor_iio_common *st, } EXPORT_SYMBOL(hid_sensor_write_samp_freq_value); -int hid_sensor_read_raw_hyst_value(struct hid_sensor_iio_common *st, +int hid_sensor_read_raw_hyst_value(struct hid_sensor_common *st, int *val1, int *val2) { s32 value; @@ -191,7 +190,7 @@ int hid_sensor_read_raw_hyst_value(struct hid_sensor_iio_common *st, } EXPORT_SYMBOL(hid_sensor_read_raw_hyst_value); -int hid_sensor_write_raw_hyst_value(struct hid_sensor_iio_common *st, +int hid_sensor_write_raw_hyst_value(struct hid_sensor_common *st, int val1, int val2) { s32 value; @@ -212,7 +211,7 @@ EXPORT_SYMBOL(hid_sensor_write_raw_hyst_value); int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev, u32 usage_id, - struct hid_sensor_iio_common *st) + struct hid_sensor_common *st) { sensor_hub_input_get_attribute_info(hsdev, diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.h b/drivers/iio/common/hid-sensors/hid-sensor-attributes.h deleted file mode 100644 index a4676a0c3de5..000000000000 --- a/drivers/iio/common/hid-sensors/hid-sensor-attributes.h +++ /dev/null @@ -1,57 +0,0 @@ -/* - * HID Sensors Driver - * Copyright (c) 2012, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - * - */ -#ifndef _HID_SENSORS_ATTRIBUTES_H -#define _HID_SENSORS_ATTRIBUTES_H - -/* Common hid sensor iio structure */ -struct hid_sensor_iio_common { - struct hid_sensor_hub_device *hsdev; - struct platform_device *pdev; - unsigned usage_id; - bool data_ready; - struct hid_sensor_hub_attribute_info poll; - struct hid_sensor_hub_attribute_info report_state; - struct hid_sensor_hub_attribute_info power_state; - struct hid_sensor_hub_attribute_info sensitivity; -}; - -/*Convert from hid unit expo to regular exponent*/ -static inline int hid_sensor_convert_exponent(int unit_expo) -{ - if (unit_expo < 0x08) - return unit_expo; - else if (unit_expo <= 0x0f) - return -(0x0f-unit_expo+1); - else - return 0; -} - -int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev, - u32 usage_id, - struct hid_sensor_iio_common *st); -int hid_sensor_write_raw_hyst_value(struct hid_sensor_iio_common *st, - int val1, int val2); -int hid_sensor_read_raw_hyst_value(struct hid_sensor_iio_common *st, - int *val1, int *val2); -int hid_sensor_write_samp_freq_value(struct hid_sensor_iio_common *st, - int val1, int val2); -int hid_sensor_read_samp_freq_value(struct hid_sensor_iio_common *st, - int *val1, int *val2); - -#endif diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c index d4b790d18efb..7a525a91105d 100644 --- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c +++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c @@ -26,20 +26,17 @@ #include <linux/iio/iio.h> #include <linux/iio/trigger.h> #include <linux/iio/sysfs.h> -#include "hid-sensor-attributes.h" #include "hid-sensor-trigger.h" static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig, bool state) { - struct hid_sensor_iio_common *st = trig->private_data; + struct hid_sensor_common *st = trig->private_data; int state_val; state_val = state ? 1 : 0; -#if (defined CONFIG_HID_SENSOR_ENUM_BASE_QUIRKS) || \ - (defined CONFIG_HID_SENSOR_ENUM_BASE_QUIRKS_MODULE) - ++state_val; -#endif + if (IS_ENABLED(CONFIG_HID_SENSOR_ENUM_BASE_QUIRKS)) + ++state_val; st->data_ready = state; sensor_hub_set_feature(st->hsdev, st->power_state.report_id, st->power_state.index, @@ -66,7 +63,7 @@ static const struct iio_trigger_ops hid_sensor_trigger_ops = { }; int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name, - struct hid_sensor_iio_common *attrb) + struct hid_sensor_common *attrb) { int ret; struct iio_trigger *trig; diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.h b/drivers/iio/common/hid-sensors/hid-sensor-trigger.h index fd982971b1b8..9a8731478eda 100644 --- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.h +++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.h @@ -20,7 +20,7 @@ #define _HID_SENSOR_TRIGGER_H int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name, - struct hid_sensor_iio_common *attrb); + struct hid_sensor_common *attrb); void hid_sensor_remove_trigger(struct iio_dev *indio_dev); #endif diff --git a/drivers/iio/common/st_sensors/Kconfig b/drivers/iio/common/st_sensors/Kconfig new file mode 100644 index 000000000000..865f1ca33eb9 --- /dev/null +++ b/drivers/iio/common/st_sensors/Kconfig @@ -0,0 +1,14 @@ +# +# STMicroelectronics sensors common library +# + +config IIO_ST_SENSORS_I2C + tristate + +config IIO_ST_SENSORS_SPI + tristate + +config IIO_ST_SENSORS_CORE + tristate + select IIO_ST_SENSORS_I2C if I2C + select IIO_ST_SENSORS_SPI if SPI_MASTER diff --git a/drivers/iio/common/st_sensors/Makefile b/drivers/iio/common/st_sensors/Makefile new file mode 100644 index 000000000000..9f3e24f3024b --- /dev/null +++ b/drivers/iio/common/st_sensors/Makefile @@ -0,0 +1,10 @@ +# +# Makefile for the STMicroelectronics sensor common modules. +# + +obj-$(CONFIG_IIO_ST_SENSORS_I2C) += st_sensors_i2c.o +obj-$(CONFIG_IIO_ST_SENSORS_SPI) += st_sensors_spi.o +obj-$(CONFIG_IIO_ST_SENSORS_CORE) += st_sensors.o +st_sensors-y := st_sensors_core.o +st_sensors-$(CONFIG_IIO_BUFFER) += st_sensors_buffer.o +st_sensors-$(CONFIG_IIO_TRIGGER) += st_sensors_trigger.o diff --git a/drivers/iio/common/st_sensors/st_sensors_buffer.c b/drivers/iio/common/st_sensors/st_sensors_buffer.c new file mode 100644 index 000000000000..09b236d6ee89 --- /dev/null +++ b/drivers/iio/common/st_sensors/st_sensors_buffer.c @@ -0,0 +1,116 @@ +/* + * STMicroelectronics sensors buffer library driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/iio/iio.h> +#include <linux/iio/trigger.h> +#include <linux/interrupt.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/irqreturn.h> + +#include <linux/iio/common/st_sensors.h> + + +int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf) +{ + int i, n = 0, len; + u8 addr[ST_SENSORS_NUMBER_DATA_CHANNELS]; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + for (i = 0; i < ST_SENSORS_NUMBER_DATA_CHANNELS; i++) { + if (test_bit(i, indio_dev->active_scan_mask)) { + addr[n] = indio_dev->channels[i].address; + n++; + } + } + switch (n) { + case 1: + len = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev, + addr[0], ST_SENSORS_BYTE_FOR_CHANNEL, buf, + sdata->multiread_bit); + break; + case 2: + if ((addr[1] - addr[0]) == ST_SENSORS_BYTE_FOR_CHANNEL) { + len = sdata->tf->read_multiple_byte(&sdata->tb, + sdata->dev, addr[0], + ST_SENSORS_BYTE_FOR_CHANNEL*n, + buf, sdata->multiread_bit); + } else { + u8 rx_array[ST_SENSORS_BYTE_FOR_CHANNEL* + ST_SENSORS_NUMBER_DATA_CHANNELS]; + len = sdata->tf->read_multiple_byte(&sdata->tb, + sdata->dev, addr[0], + ST_SENSORS_BYTE_FOR_CHANNEL* + ST_SENSORS_NUMBER_DATA_CHANNELS, + rx_array, sdata->multiread_bit); + if (len < 0) + goto read_data_channels_error; + + for (i = 0; i < n * ST_SENSORS_NUMBER_DATA_CHANNELS; + i++) { + if (i < n) + buf[i] = rx_array[i]; + else + buf[i] = rx_array[n + i]; + } + len = ST_SENSORS_BYTE_FOR_CHANNEL*n; + } + break; + case 3: + len = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev, + addr[0], ST_SENSORS_BYTE_FOR_CHANNEL* + ST_SENSORS_NUMBER_DATA_CHANNELS, + buf, sdata->multiread_bit); + break; + default: + len = -EINVAL; + goto read_data_channels_error; + } + if (len != ST_SENSORS_BYTE_FOR_CHANNEL*n) { + len = -EIO; + goto read_data_channels_error; + } + +read_data_channels_error: + return len; +} +EXPORT_SYMBOL(st_sensors_get_buffer_element); + +irqreturn_t st_sensors_trigger_handler(int irq, void *p) +{ + int len; + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + len = st_sensors_get_buffer_element(indio_dev, sdata->buffer_data); + if (len < 0) + goto st_sensors_get_buffer_element_error; + + if (indio_dev->scan_timestamp) + *(s64 *)((u8 *)sdata->buffer_data + + ALIGN(len, sizeof(s64))) = pf->timestamp; + + iio_push_to_buffers(indio_dev, sdata->buffer_data); + +st_sensors_get_buffer_element_error: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} +EXPORT_SYMBOL(st_sensors_trigger_handler); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics ST-sensors buffer"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c new file mode 100644 index 000000000000..bd33473f8e38 --- /dev/null +++ b/drivers/iio/common/st_sensors/st_sensors_core.c @@ -0,0 +1,445 @@ +/* + * STMicroelectronics sensors core library driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/iio/iio.h> +#include <asm/unaligned.h> + +#include <linux/iio/common/st_sensors.h> + + +#define ST_SENSORS_WAI_ADDRESS 0x0f + +static int st_sensors_write_data_with_mask(struct iio_dev *indio_dev, + u8 reg_addr, u8 mask, u8 data) +{ + int err; + u8 new_data; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + err = sdata->tf->read_byte(&sdata->tb, sdata->dev, reg_addr, &new_data); + if (err < 0) + goto st_sensors_write_data_with_mask_error; + + new_data = ((new_data & (~mask)) | ((data << __ffs(mask)) & mask)); + err = sdata->tf->write_byte(&sdata->tb, sdata->dev, reg_addr, new_data); + +st_sensors_write_data_with_mask_error: + return err; +} + +static int st_sensors_match_odr(struct st_sensors *sensor, + unsigned int odr, struct st_sensor_odr_avl *odr_out) +{ + int i, ret = -EINVAL; + + for (i = 0; i < ST_SENSORS_ODR_LIST_MAX; i++) { + if (sensor->odr.odr_avl[i].hz == 0) + goto st_sensors_match_odr_error; + + if (sensor->odr.odr_avl[i].hz == odr) { + odr_out->hz = sensor->odr.odr_avl[i].hz; + odr_out->value = sensor->odr.odr_avl[i].value; + ret = 0; + break; + } + } + +st_sensors_match_odr_error: + return ret; +} + +int st_sensors_set_odr(struct iio_dev *indio_dev, unsigned int odr) +{ + int err; + struct st_sensor_odr_avl odr_out = {0, 0}; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + err = st_sensors_match_odr(sdata->sensor, odr, &odr_out); + if (err < 0) + goto st_sensors_match_odr_error; + + if ((sdata->sensor->odr.addr == sdata->sensor->pw.addr) && + (sdata->sensor->odr.mask == sdata->sensor->pw.mask)) { + if (sdata->enabled == true) { + err = st_sensors_write_data_with_mask(indio_dev, + sdata->sensor->odr.addr, + sdata->sensor->odr.mask, + odr_out.value); + } else { + err = 0; + } + } else { + err = st_sensors_write_data_with_mask(indio_dev, + sdata->sensor->odr.addr, sdata->sensor->odr.mask, + odr_out.value); + } + if (err >= 0) + sdata->odr = odr_out.hz; + +st_sensors_match_odr_error: + return err; +} +EXPORT_SYMBOL(st_sensors_set_odr); + +static int st_sensors_match_fs(struct st_sensors *sensor, + unsigned int fs, int *index_fs_avl) +{ + int i, ret = -EINVAL; + + for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) { + if (sensor->fs.fs_avl[i].num == 0) + goto st_sensors_match_odr_error; + + if (sensor->fs.fs_avl[i].num == fs) { + *index_fs_avl = i; + ret = 0; + break; + } + } + +st_sensors_match_odr_error: + return ret; +} + +static int st_sensors_set_fullscale(struct iio_dev *indio_dev, unsigned int fs) +{ + int err, i = 0; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + err = st_sensors_match_fs(sdata->sensor, fs, &i); + if (err < 0) + goto st_accel_set_fullscale_error; + + err = st_sensors_write_data_with_mask(indio_dev, + sdata->sensor->fs.addr, + sdata->sensor->fs.mask, + sdata->sensor->fs.fs_avl[i].value); + if (err < 0) + goto st_accel_set_fullscale_error; + + sdata->current_fullscale = (struct st_sensor_fullscale_avl *) + &sdata->sensor->fs.fs_avl[i]; + return err; + +st_accel_set_fullscale_error: + dev_err(&indio_dev->dev, "failed to set new fullscale.\n"); + return err; +} + +int st_sensors_set_enable(struct iio_dev *indio_dev, bool enable) +{ + u8 tmp_value; + int err = -EINVAL; + bool found = false; + struct st_sensor_odr_avl odr_out = {0, 0}; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + if (enable) { + tmp_value = sdata->sensor->pw.value_on; + if ((sdata->sensor->odr.addr == sdata->sensor->pw.addr) && + (sdata->sensor->odr.mask == sdata->sensor->pw.mask)) { + err = st_sensors_match_odr(sdata->sensor, + sdata->odr, &odr_out); + if (err < 0) + goto set_enable_error; + tmp_value = odr_out.value; + found = true; + } + err = st_sensors_write_data_with_mask(indio_dev, + sdata->sensor->pw.addr, + sdata->sensor->pw.mask, tmp_value); + if (err < 0) + goto set_enable_error; + + sdata->enabled = true; + + if (found) + sdata->odr = odr_out.hz; + } else { + err = st_sensors_write_data_with_mask(indio_dev, + sdata->sensor->pw.addr, + sdata->sensor->pw.mask, + sdata->sensor->pw.value_off); + if (err < 0) + goto set_enable_error; + + sdata->enabled = false; + } + +set_enable_error: + return err; +} +EXPORT_SYMBOL(st_sensors_set_enable); + +int st_sensors_set_axis_enable(struct iio_dev *indio_dev, u8 axis_enable) +{ + struct st_sensor_data *sdata = iio_priv(indio_dev); + + return st_sensors_write_data_with_mask(indio_dev, + sdata->sensor->enable_axis.addr, + sdata->sensor->enable_axis.mask, axis_enable); +} +EXPORT_SYMBOL(st_sensors_set_axis_enable); + +int st_sensors_init_sensor(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + mutex_init(&sdata->tb.buf_lock); + + err = st_sensors_set_enable(indio_dev, false); + if (err < 0) + goto init_error; + + err = st_sensors_set_fullscale(indio_dev, + sdata->current_fullscale->num); + if (err < 0) + goto init_error; + + err = st_sensors_set_odr(indio_dev, sdata->odr); + if (err < 0) + goto init_error; + + /* set BDU */ + err = st_sensors_write_data_with_mask(indio_dev, + sdata->sensor->bdu.addr, sdata->sensor->bdu.mask, true); + if (err < 0) + goto init_error; + + err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS); + +init_error: + return err; +} +EXPORT_SYMBOL(st_sensors_init_sensor); + +int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable) +{ + int err; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + /* Enable/Disable the interrupt generator 1. */ + if (sdata->sensor->drdy_irq.ig1.en_addr > 0) { + err = st_sensors_write_data_with_mask(indio_dev, + sdata->sensor->drdy_irq.ig1.en_addr, + sdata->sensor->drdy_irq.ig1.en_mask, (int)enable); + if (err < 0) + goto st_accel_set_dataready_irq_error; + } + + /* Enable/Disable the interrupt generator for data ready. */ + err = st_sensors_write_data_with_mask(indio_dev, + sdata->sensor->drdy_irq.addr, + sdata->sensor->drdy_irq.mask, (int)enable); + +st_accel_set_dataready_irq_error: + return err; +} +EXPORT_SYMBOL(st_sensors_set_dataready_irq); + +int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale) +{ + int err = -EINVAL, i; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) { + if ((sdata->sensor->fs.fs_avl[i].gain == scale) && + (sdata->sensor->fs.fs_avl[i].gain != 0)) { + err = 0; + break; + } + } + if (err < 0) + goto st_sensors_match_scale_error; + + err = st_sensors_set_fullscale(indio_dev, + sdata->sensor->fs.fs_avl[i].num); + +st_sensors_match_scale_error: + return err; +} +EXPORT_SYMBOL(st_sensors_set_fullscale_by_gain); + +static int st_sensors_read_axis_data(struct iio_dev *indio_dev, + u8 ch_addr, int *data) +{ + int err; + u8 outdata[ST_SENSORS_BYTE_FOR_CHANNEL]; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + err = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev, + ch_addr, ST_SENSORS_BYTE_FOR_CHANNEL, + outdata, sdata->multiread_bit); + if (err < 0) + goto read_error; + + *data = (s16)get_unaligned_le16(outdata); + +read_error: + return err; +} + +int st_sensors_read_info_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *ch, int *val) +{ + int err; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + mutex_lock(&indio_dev->mlock); + if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) { + err = -EBUSY; + goto read_error; + } else { + err = st_sensors_set_enable(indio_dev, true); + if (err < 0) + goto read_error; + + msleep((sdata->sensor->bootime * 1000) / sdata->odr); + err = st_sensors_read_axis_data(indio_dev, ch->address, val); + if (err < 0) + goto read_error; + + *val = *val >> ch->scan_type.shift; + } + mutex_unlock(&indio_dev->mlock); + + return err; + +read_error: + mutex_unlock(&indio_dev->mlock); + return err; +} +EXPORT_SYMBOL(st_sensors_read_info_raw); + +int st_sensors_check_device_support(struct iio_dev *indio_dev, + int num_sensors_list, const struct st_sensors *sensors) +{ + u8 wai; + int i, n, err; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + err = sdata->tf->read_byte(&sdata->tb, sdata->dev, + ST_SENSORS_DEFAULT_WAI_ADDRESS, &wai); + if (err < 0) { + dev_err(&indio_dev->dev, "failed to read Who-Am-I register.\n"); + goto read_wai_error; + } + + for (i = 0; i < num_sensors_list; i++) { + if (sensors[i].wai == wai) + break; + } + if (i == num_sensors_list) + goto device_not_supported; + + for (n = 0; n < ARRAY_SIZE(sensors[i].sensors_supported); n++) { + if (strcmp(indio_dev->name, + &sensors[i].sensors_supported[n][0]) == 0) + break; + } + if (n == ARRAY_SIZE(sensors[i].sensors_supported)) { + dev_err(&indio_dev->dev, "device name and WhoAmI mismatch.\n"); + goto sensor_name_mismatch; + } + + sdata->sensor = (struct st_sensors *)&sensors[i]; + + return i; + +device_not_supported: + dev_err(&indio_dev->dev, "device not supported: WhoAmI (0x%x).\n", wai); +sensor_name_mismatch: + err = -ENODEV; +read_wai_error: + return err; +} +EXPORT_SYMBOL(st_sensors_check_device_support); + +ssize_t st_sensors_sysfs_get_sampling_frequency(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct st_sensor_data *adata = iio_priv(dev_get_drvdata(dev)); + + return sprintf(buf, "%d\n", adata->odr); +} +EXPORT_SYMBOL(st_sensors_sysfs_get_sampling_frequency); + +ssize_t st_sensors_sysfs_set_sampling_frequency(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + int err; + unsigned int odr; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + + err = kstrtoint(buf, 10, &odr); + if (err < 0) + goto conversion_error; + + mutex_lock(&indio_dev->mlock); + err = st_sensors_set_odr(indio_dev, odr); + mutex_unlock(&indio_dev->mlock); + +conversion_error: + return err < 0 ? err : size; +} +EXPORT_SYMBOL(st_sensors_sysfs_set_sampling_frequency); + +ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int i, len = 0; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct st_sensor_data *sdata = iio_priv(indio_dev); + + mutex_lock(&indio_dev->mlock); + for (i = 0; i < ST_SENSORS_ODR_LIST_MAX; i++) { + if (sdata->sensor->odr.odr_avl[i].hz == 0) + break; + + len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", + sdata->sensor->odr.odr_avl[i].hz); + } + mutex_unlock(&indio_dev->mlock); + buf[len - 1] = '\n'; + + return len; +} +EXPORT_SYMBOL(st_sensors_sysfs_sampling_frequency_avail); + +ssize_t st_sensors_sysfs_scale_avail(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int i, len = 0; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct st_sensor_data *sdata = iio_priv(indio_dev); + + mutex_lock(&indio_dev->mlock); + for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) { + if (sdata->sensor->fs.fs_avl[i].num == 0) + break; + + len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06u ", + sdata->sensor->fs.fs_avl[i].gain); + } + mutex_unlock(&indio_dev->mlock); + buf[len - 1] = '\n'; + + return len; +} +EXPORT_SYMBOL(st_sensors_sysfs_scale_avail); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics ST-sensors core"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/common/st_sensors/st_sensors_i2c.c b/drivers/iio/common/st_sensors/st_sensors_i2c.c new file mode 100644 index 000000000000..38af9440c103 --- /dev/null +++ b/drivers/iio/common/st_sensors/st_sensors_i2c.c @@ -0,0 +1,81 @@ +/* + * STMicroelectronics sensors i2c library driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/iio/iio.h> + +#include <linux/iio/common/st_sensors_i2c.h> + + +#define ST_SENSORS_I2C_MULTIREAD 0x80 + +static unsigned int st_sensors_i2c_get_irq(struct iio_dev *indio_dev) +{ + struct st_sensor_data *sdata = iio_priv(indio_dev); + + return to_i2c_client(sdata->dev)->irq; +} + +static int st_sensors_i2c_read_byte(struct st_sensor_transfer_buffer *tb, + struct device *dev, u8 reg_addr, u8 *res_byte) +{ + int err; + + err = i2c_smbus_read_byte_data(to_i2c_client(dev), reg_addr); + if (err < 0) + goto st_accel_i2c_read_byte_error; + + *res_byte = err & 0xff; + +st_accel_i2c_read_byte_error: + return err < 0 ? err : 0; +} + +static int st_sensors_i2c_read_multiple_byte( + struct st_sensor_transfer_buffer *tb, struct device *dev, + u8 reg_addr, int len, u8 *data, bool multiread_bit) +{ + if (multiread_bit) + reg_addr |= ST_SENSORS_I2C_MULTIREAD; + + return i2c_smbus_read_i2c_block_data(to_i2c_client(dev), + reg_addr, len, data); +} + +static int st_sensors_i2c_write_byte(struct st_sensor_transfer_buffer *tb, + struct device *dev, u8 reg_addr, u8 data) +{ + return i2c_smbus_write_byte_data(to_i2c_client(dev), reg_addr, data); +} + +static const struct st_sensor_transfer_function st_sensors_tf_i2c = { + .read_byte = st_sensors_i2c_read_byte, + .write_byte = st_sensors_i2c_write_byte, + .read_multiple_byte = st_sensors_i2c_read_multiple_byte, +}; + +void st_sensors_i2c_configure(struct iio_dev *indio_dev, + struct i2c_client *client, struct st_sensor_data *sdata) +{ + i2c_set_clientdata(client, indio_dev); + + indio_dev->dev.parent = &client->dev; + indio_dev->name = client->name; + + sdata->tf = &st_sensors_tf_i2c; + sdata->get_irq_data_ready = st_sensors_i2c_get_irq; +} +EXPORT_SYMBOL(st_sensors_i2c_configure); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics ST-sensors i2c driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/common/st_sensors/st_sensors_spi.c b/drivers/iio/common/st_sensors/st_sensors_spi.c new file mode 100644 index 000000000000..f0aa2f105222 --- /dev/null +++ b/drivers/iio/common/st_sensors/st_sensors_spi.c @@ -0,0 +1,128 @@ +/* + * STMicroelectronics sensors spi library driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/iio/iio.h> + +#include <linux/iio/common/st_sensors_spi.h> + + +#define ST_SENSORS_SPI_MULTIREAD 0xc0 +#define ST_SENSORS_SPI_READ 0x80 + +static unsigned int st_sensors_spi_get_irq(struct iio_dev *indio_dev) +{ + struct st_sensor_data *sdata = iio_priv(indio_dev); + + return to_spi_device(sdata->dev)->irq; +} + +static int st_sensors_spi_read(struct st_sensor_transfer_buffer *tb, + struct device *dev, u8 reg_addr, int len, u8 *data, bool multiread_bit) +{ + struct spi_message msg; + int err; + + struct spi_transfer xfers[] = { + { + .tx_buf = tb->tx_buf, + .bits_per_word = 8, + .len = 1, + }, + { + .rx_buf = tb->rx_buf, + .bits_per_word = 8, + .len = len, + } + }; + + mutex_lock(&tb->buf_lock); + if ((multiread_bit) && (len > 1)) + tb->tx_buf[0] = reg_addr | ST_SENSORS_SPI_MULTIREAD; + else + tb->tx_buf[0] = reg_addr | ST_SENSORS_SPI_READ; + + spi_message_init(&msg); + spi_message_add_tail(&xfers[0], &msg); + spi_message_add_tail(&xfers[1], &msg); + err = spi_sync(to_spi_device(dev), &msg); + if (err) + goto acc_spi_read_error; + + memcpy(data, tb->rx_buf, len*sizeof(u8)); + mutex_unlock(&tb->buf_lock); + return len; + +acc_spi_read_error: + mutex_unlock(&tb->buf_lock); + return err; +} + +static int st_sensors_spi_read_byte(struct st_sensor_transfer_buffer *tb, + struct device *dev, u8 reg_addr, u8 *res_byte) +{ + return st_sensors_spi_read(tb, dev, reg_addr, 1, res_byte, false); +} + +static int st_sensors_spi_read_multiple_byte( + struct st_sensor_transfer_buffer *tb, struct device *dev, + u8 reg_addr, int len, u8 *data, bool multiread_bit) +{ + return st_sensors_spi_read(tb, dev, reg_addr, len, data, multiread_bit); +} + +static int st_sensors_spi_write_byte(struct st_sensor_transfer_buffer *tb, + struct device *dev, u8 reg_addr, u8 data) +{ + struct spi_message msg; + int err; + + struct spi_transfer xfers = { + .tx_buf = tb->tx_buf, + .bits_per_word = 8, + .len = 2, + }; + + mutex_lock(&tb->buf_lock); + tb->tx_buf[0] = reg_addr; + tb->tx_buf[1] = data; + + spi_message_init(&msg); + spi_message_add_tail(&xfers, &msg); + err = spi_sync(to_spi_device(dev), &msg); + mutex_unlock(&tb->buf_lock); + + return err; +} + +static const struct st_sensor_transfer_function st_sensors_tf_spi = { + .read_byte = st_sensors_spi_read_byte, + .write_byte = st_sensors_spi_write_byte, + .read_multiple_byte = st_sensors_spi_read_multiple_byte, +}; + +void st_sensors_spi_configure(struct iio_dev *indio_dev, + struct spi_device *spi, struct st_sensor_data *sdata) +{ + spi_set_drvdata(spi, indio_dev); + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi->modalias; + + sdata->tf = &st_sensors_tf_spi; + sdata->get_irq_data_ready = st_sensors_spi_get_irq; +} +EXPORT_SYMBOL(st_sensors_spi_configure); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics ST-sensors spi driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/common/st_sensors/st_sensors_trigger.c b/drivers/iio/common/st_sensors/st_sensors_trigger.c new file mode 100644 index 000000000000..139ed030abb0 --- /dev/null +++ b/drivers/iio/common/st_sensors/st_sensors_trigger.c @@ -0,0 +1,77 @@ +/* + * STMicroelectronics sensors trigger library driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/iio/iio.h> +#include <linux/iio/trigger.h> +#include <linux/interrupt.h> + +#include <linux/iio/common/st_sensors.h> + + +int st_sensors_allocate_trigger(struct iio_dev *indio_dev, + const struct iio_trigger_ops *trigger_ops) +{ + int err; + struct st_sensor_data *sdata = iio_priv(indio_dev); + + sdata->trig = iio_trigger_alloc("%s-trigger", indio_dev->name); + if (sdata->trig == NULL) { + err = -ENOMEM; + dev_err(&indio_dev->dev, "failed to allocate iio trigger.\n"); + goto iio_trigger_alloc_error; + } + + err = request_threaded_irq(sdata->get_irq_data_ready(indio_dev), + iio_trigger_generic_data_rdy_poll, + NULL, + IRQF_TRIGGER_RISING, + sdata->trig->name, + sdata->trig); + if (err) + goto request_irq_error; + + sdata->trig->private_data = indio_dev; + sdata->trig->ops = trigger_ops; + sdata->trig->dev.parent = sdata->dev; + + err = iio_trigger_register(sdata->trig); + if (err < 0) { + dev_err(&indio_dev->dev, "failed to register iio trigger.\n"); + goto iio_trigger_register_error; + } + indio_dev->trig = sdata->trig; + + return 0; + +iio_trigger_register_error: + free_irq(sdata->get_irq_data_ready(indio_dev), sdata->trig); +request_irq_error: + iio_trigger_free(sdata->trig); +iio_trigger_alloc_error: + return err; +} +EXPORT_SYMBOL(st_sensors_allocate_trigger); + +void st_sensors_deallocate_trigger(struct iio_dev *indio_dev) +{ + struct st_sensor_data *sdata = iio_priv(indio_dev); + + iio_trigger_unregister(sdata->trig); + free_irq(sdata->get_irq_data_ready(indio_dev), sdata->trig); + iio_trigger_free(sdata->trig); +} +EXPORT_SYMBOL(st_sensors_deallocate_trigger); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics ST-sensors trigger"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig index b1c0ee5294ca..f4a6f0838327 100644 --- a/drivers/iio/dac/Kconfig +++ b/drivers/iio/dac/Kconfig @@ -67,6 +67,16 @@ config AD5446 To compile this driver as a module, choose M here: the module will be called ad5446. +config AD5449 + tristate "Analog Device AD5449 and similar DACs driver" + depends on SPI_MASTER + help + Say yes here to build support for Analog Devices AD5415, AD5426, AD5429, + AD5432, AD5439, AD5443, AD5449 Digital to Analog Converters. + + To compile this driver as a module, choose M here: the + module will be called ad5449. + config AD5504 tristate "Analog Devices AD5504/AD5501 DAC SPI driver" depends on SPI @@ -122,7 +132,7 @@ config AD5686 config MAX517 tristate "Maxim MAX517/518/519 DAC driver" - depends on I2C && EXPERIMENTAL + depends on I2C help If you say yes here you get support for the Maxim chips MAX517, MAX518 and MAX519 (I2C 8-Bit DACs with rail-to-rail outputs). diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile index c0d333b23ba3..5b528ebb3343 100644 --- a/drivers/iio/dac/Makefile +++ b/drivers/iio/dac/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o obj-$(CONFIG_AD5064) += ad5064.o obj-$(CONFIG_AD5504) += ad5504.o obj-$(CONFIG_AD5446) += ad5446.o +obj-$(CONFIG_AD5449) += ad5449.o obj-$(CONFIG_AD5755) += ad5755.o obj-$(CONFIG_AD5764) += ad5764.o obj-$(CONFIG_AD5791) += ad5791.o diff --git a/drivers/iio/dac/ad5064.c b/drivers/iio/dac/ad5064.c index eb281a2c295b..74f2d52795f6 100644 --- a/drivers/iio/dac/ad5064.c +++ b/drivers/iio/dac/ad5064.c @@ -27,7 +27,6 @@ #define AD5064_ADDR(x) ((x) << 20) #define AD5064_CMD(x) ((x) << 24) -#define AD5064_ADDR_DAC(chan) (chan) #define AD5064_ADDR_ALL_DAC 0xF #define AD5064_CMD_WRITE_INPUT_N 0x0 @@ -131,15 +130,15 @@ static int ad5064_write(struct ad5064_state *st, unsigned int cmd, } static int ad5064_sync_powerdown_mode(struct ad5064_state *st, - unsigned int channel) + const struct iio_chan_spec *chan) { unsigned int val; int ret; - val = (0x1 << channel); + val = (0x1 << chan->address); - if (st->pwr_down[channel]) - val |= st->pwr_down_mode[channel] << 8; + if (st->pwr_down[chan->channel]) + val |= st->pwr_down_mode[chan->channel] << 8; ret = ad5064_write(st, AD5064_CMD_POWERDOWN_DAC, 0, val, 0); @@ -169,7 +168,7 @@ static int ad5064_set_powerdown_mode(struct iio_dev *indio_dev, mutex_lock(&indio_dev->mlock); st->pwr_down_mode[chan->channel] = mode + 1; - ret = ad5064_sync_powerdown_mode(st, chan->channel); + ret = ad5064_sync_powerdown_mode(st, chan); mutex_unlock(&indio_dev->mlock); return ret; @@ -205,7 +204,7 @@ static ssize_t ad5064_write_dac_powerdown(struct iio_dev *indio_dev, mutex_lock(&indio_dev->mlock); st->pwr_down[chan->channel] = pwr_down; - ret = ad5064_sync_powerdown_mode(st, chan->channel); + ret = ad5064_sync_powerdown_mode(st, chan); mutex_unlock(&indio_dev->mlock); return ret ? ret : len; } @@ -258,7 +257,7 @@ static int ad5064_write_raw(struct iio_dev *indio_dev, switch (mask) { case IIO_CHAN_INFO_RAW: - if (val > (1 << chan->scan_type.realbits) || val < 0) + if (val >= (1 << chan->scan_type.realbits) || val < 0) return -EINVAL; mutex_lock(&indio_dev->mlock); @@ -292,34 +291,44 @@ static const struct iio_chan_spec_ext_info ad5064_ext_info[] = { { }, }; -#define AD5064_CHANNEL(chan, bits) { \ +#define AD5064_CHANNEL(chan, addr, bits) { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ .output = 1, \ .channel = (chan), \ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ - .address = AD5064_ADDR_DAC(chan), \ + .address = addr, \ .scan_type = IIO_ST('u', (bits), 16, 20 - (bits)), \ .ext_info = ad5064_ext_info, \ } #define DECLARE_AD5064_CHANNELS(name, bits) \ const struct iio_chan_spec name[] = { \ - AD5064_CHANNEL(0, bits), \ - AD5064_CHANNEL(1, bits), \ - AD5064_CHANNEL(2, bits), \ - AD5064_CHANNEL(3, bits), \ - AD5064_CHANNEL(4, bits), \ - AD5064_CHANNEL(5, bits), \ - AD5064_CHANNEL(6, bits), \ - AD5064_CHANNEL(7, bits), \ + AD5064_CHANNEL(0, 0, bits), \ + AD5064_CHANNEL(1, 1, bits), \ + AD5064_CHANNEL(2, 2, bits), \ + AD5064_CHANNEL(3, 3, bits), \ + AD5064_CHANNEL(4, 4, bits), \ + AD5064_CHANNEL(5, 5, bits), \ + AD5064_CHANNEL(6, 6, bits), \ + AD5064_CHANNEL(7, 7, bits), \ +} + +#define DECLARE_AD5065_CHANNELS(name, bits) \ +const struct iio_chan_spec name[] = { \ + AD5064_CHANNEL(0, 0, bits), \ + AD5064_CHANNEL(1, 3, bits), \ } static DECLARE_AD5064_CHANNELS(ad5024_channels, 12); static DECLARE_AD5064_CHANNELS(ad5044_channels, 14); static DECLARE_AD5064_CHANNELS(ad5064_channels, 16); +static DECLARE_AD5065_CHANNELS(ad5025_channels, 12); +static DECLARE_AD5065_CHANNELS(ad5045_channels, 14); +static DECLARE_AD5065_CHANNELS(ad5065_channels, 16); + static const struct ad5064_chip_info ad5064_chip_info_tbl[] = { [ID_AD5024] = { .shared_vref = false, @@ -328,7 +337,7 @@ static const struct ad5064_chip_info ad5064_chip_info_tbl[] = { }, [ID_AD5025] = { .shared_vref = false, - .channels = ad5024_channels, + .channels = ad5025_channels, .num_channels = 2, }, [ID_AD5044] = { @@ -338,7 +347,7 @@ static const struct ad5064_chip_info ad5064_chip_info_tbl[] = { }, [ID_AD5045] = { .shared_vref = false, - .channels = ad5044_channels, + .channels = ad5045_channels, .num_channels = 2, }, [ID_AD5064] = { @@ -353,7 +362,7 @@ static const struct ad5064_chip_info ad5064_chip_info_tbl[] = { }, [ID_AD5065] = { .shared_vref = false, - .channels = ad5064_channels, + .channels = ad5065_channels, .num_channels = 2, }, [ID_AD5628_1] = { @@ -424,11 +433,12 @@ static const char * const ad5064_vref_name(struct ad5064_state *st, return st->chip_info->shared_vref ? "vref" : ad5064_vref_names[vref]; } -static int __devinit ad5064_probe(struct device *dev, enum ad5064_type type, - const char *name, ad5064_write_func write) +static int ad5064_probe(struct device *dev, enum ad5064_type type, + const char *name, ad5064_write_func write) { struct iio_dev *indio_dev; struct ad5064_state *st; + unsigned int midscale; unsigned int i; int ret; @@ -465,11 +475,6 @@ static int __devinit ad5064_probe(struct device *dev, enum ad5064_type type, goto error_free_reg; } - for (i = 0; i < st->chip_info->num_channels; ++i) { - st->pwr_down_mode[i] = AD5064_LDAC_PWRDN_1K; - st->dac_cache[i] = 0x8000; - } - indio_dev->dev.parent = dev; indio_dev->name = name; indio_dev->info = &ad5064_info; @@ -477,6 +482,13 @@ static int __devinit ad5064_probe(struct device *dev, enum ad5064_type type, indio_dev->channels = st->chip_info->channels; indio_dev->num_channels = st->chip_info->num_channels; + midscale = (1 << indio_dev->channels[0].scan_type.realbits) / 2; + + for (i = 0; i < st->chip_info->num_channels; ++i) { + st->pwr_down_mode[i] = AD5064_LDAC_PWRDN_1K; + st->dac_cache[i] = midscale; + } + ret = iio_device_register(indio_dev); if (ret) goto error_disable_reg; @@ -495,7 +507,7 @@ error_free: return ret; } -static int __devexit ad5064_remove(struct device *dev) +static int ad5064_remove(struct device *dev) { struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ad5064_state *st = iio_priv(indio_dev); @@ -523,7 +535,7 @@ static int ad5064_spi_write(struct ad5064_state *st, unsigned int cmd, return spi_write(spi, &st->data.spi, sizeof(st->data.spi)); } -static int __devinit ad5064_spi_probe(struct spi_device *spi) +static int ad5064_spi_probe(struct spi_device *spi) { const struct spi_device_id *id = spi_get_device_id(spi); @@ -531,7 +543,7 @@ static int __devinit ad5064_spi_probe(struct spi_device *spi) ad5064_spi_write); } -static int __devexit ad5064_spi_remove(struct spi_device *spi) +static int ad5064_spi_remove(struct spi_device *spi) { return ad5064_remove(&spi->dev); } @@ -563,7 +575,7 @@ static struct spi_driver ad5064_spi_driver = { .owner = THIS_MODULE, }, .probe = ad5064_spi_probe, - .remove = __devexit_p(ad5064_spi_remove), + .remove = ad5064_spi_remove, .id_table = ad5064_spi_ids, }; @@ -596,14 +608,14 @@ static int ad5064_i2c_write(struct ad5064_state *st, unsigned int cmd, return i2c_master_send(i2c, st->data.i2c, 3); } -static int __devinit ad5064_i2c_probe(struct i2c_client *i2c, +static int ad5064_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { return ad5064_probe(&i2c->dev, id->driver_data, id->name, ad5064_i2c_write); } -static int __devexit ad5064_i2c_remove(struct i2c_client *i2c) +static int ad5064_i2c_remove(struct i2c_client *i2c) { return ad5064_remove(&i2c->dev); } @@ -625,7 +637,7 @@ static struct i2c_driver ad5064_i2c_driver = { .owner = THIS_MODULE, }, .probe = ad5064_i2c_probe, - .remove = __devexit_p(ad5064_i2c_remove), + .remove = ad5064_i2c_remove, .id_table = ad5064_i2c_ids, }; diff --git a/drivers/iio/dac/ad5360.c b/drivers/iio/dac/ad5360.c index 8fce84fe70b1..92771217f665 100644 --- a/drivers/iio/dac/ad5360.c +++ b/drivers/iio/dac/ad5360.c @@ -213,7 +213,6 @@ static int ad5360_read(struct iio_dev *indio_dev, unsigned int type, unsigned int addr) { struct ad5360_state *st = iio_priv(indio_dev); - struct spi_message m; int ret; struct spi_transfer t[] = { { @@ -226,10 +225,6 @@ static int ad5360_read(struct iio_dev *indio_dev, unsigned int type, }, }; - spi_message_init(&m); - spi_message_add_tail(&t[0], &m); - spi_message_add_tail(&t[1], &m); - mutex_lock(&indio_dev->mlock); st->data[0].d32 = cpu_to_be32(AD5360_CMD(AD5360_CMD_SPECIAL_FUNCTION) | @@ -237,7 +232,7 @@ static int ad5360_read(struct iio_dev *indio_dev, unsigned int type, AD5360_READBACK_TYPE(type) | AD5360_READBACK_ADDR(addr)); - ret = spi_sync(st->spi, &m); + ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t)); if (ret >= 0) ret = be32_to_cpu(st->data[1].d32) & 0xffff; @@ -433,7 +428,7 @@ static const char * const ad5360_vref_name[] = { "vref0", "vref1", "vref2" }; -static int __devinit ad5360_alloc_channels(struct iio_dev *indio_dev) +static int ad5360_alloc_channels(struct iio_dev *indio_dev) { struct ad5360_state *st = iio_priv(indio_dev); struct iio_chan_spec *channels; @@ -456,7 +451,7 @@ static int __devinit ad5360_alloc_channels(struct iio_dev *indio_dev) return 0; } -static int __devinit ad5360_probe(struct spi_device *spi) +static int ad5360_probe(struct spi_device *spi) { enum ad5360_type type = spi_get_device_id(spi)->driver_data; struct iio_dev *indio_dev; @@ -524,7 +519,7 @@ error_free: return ret; } -static int __devexit ad5360_remove(struct spi_device *spi) +static int ad5360_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad5360_state *st = iio_priv(indio_dev); @@ -560,7 +555,7 @@ static struct spi_driver ad5360_driver = { .owner = THIS_MODULE, }, .probe = ad5360_probe, - .remove = __devexit_p(ad5360_remove), + .remove = ad5360_remove, .id_table = ad5360_ids, }; module_spi_driver(ad5360_driver); diff --git a/drivers/iio/dac/ad5380.c b/drivers/iio/dac/ad5380.c index 14991ac55f26..483fc379a2da 100644 --- a/drivers/iio/dac/ad5380.c +++ b/drivers/iio/dac/ad5380.c @@ -338,7 +338,7 @@ static const struct ad5380_chip_info ad5380_chip_info_tbl[] = { }, }; -static int __devinit ad5380_alloc_channels(struct iio_dev *indio_dev) +static int ad5380_alloc_channels(struct iio_dev *indio_dev) { struct ad5380_state *st = iio_priv(indio_dev); struct iio_chan_spec *channels; @@ -361,8 +361,8 @@ static int __devinit ad5380_alloc_channels(struct iio_dev *indio_dev) return 0; } -static int __devinit ad5380_probe(struct device *dev, struct regmap *regmap, - enum ad5380_type type, const char *name) +static int ad5380_probe(struct device *dev, struct regmap *regmap, + enum ad5380_type type, const char *name) { struct iio_dev *indio_dev; struct ad5380_state *st; @@ -406,7 +406,11 @@ static int __devinit ad5380_probe(struct device *dev, struct regmap *regmap, goto error_free_reg; } - st->vref = regulator_get_voltage(st->vref_reg); + ret = regulator_get_voltage(st->vref_reg); + if (ret < 0) + goto error_disable_reg; + + st->vref = ret; } else { st->vref = st->chip_info->int_vref; ctrl |= AD5380_CTRL_INT_VREF_EN; @@ -441,7 +445,7 @@ error_out: return ret; } -static int __devexit ad5380_remove(struct device *dev) +static int ad5380_remove(struct device *dev) { struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ad5380_state *st = iio_priv(indio_dev); @@ -478,7 +482,7 @@ static const struct regmap_config ad5380_regmap_config = { #if IS_ENABLED(CONFIG_SPI_MASTER) -static int __devinit ad5380_spi_probe(struct spi_device *spi) +static int ad5380_spi_probe(struct spi_device *spi) { const struct spi_device_id *id = spi_get_device_id(spi); struct regmap *regmap; @@ -491,7 +495,7 @@ static int __devinit ad5380_spi_probe(struct spi_device *spi) return ad5380_probe(&spi->dev, regmap, id->driver_data, id->name); } -static int __devexit ad5380_spi_remove(struct spi_device *spi) +static int ad5380_spi_remove(struct spi_device *spi) { return ad5380_remove(&spi->dev); } @@ -523,7 +527,7 @@ static struct spi_driver ad5380_spi_driver = { .owner = THIS_MODULE, }, .probe = ad5380_spi_probe, - .remove = __devexit_p(ad5380_spi_remove), + .remove = ad5380_spi_remove, .id_table = ad5380_spi_ids, }; @@ -552,8 +556,8 @@ static inline void ad5380_spi_unregister_driver(void) #if IS_ENABLED(CONFIG_I2C) -static int __devinit ad5380_i2c_probe(struct i2c_client *i2c, - const struct i2c_device_id *id) +static int ad5380_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) { struct regmap *regmap; @@ -565,7 +569,7 @@ static int __devinit ad5380_i2c_probe(struct i2c_client *i2c, return ad5380_probe(&i2c->dev, regmap, id->driver_data, id->name); } -static int __devexit ad5380_i2c_remove(struct i2c_client *i2c) +static int ad5380_i2c_remove(struct i2c_client *i2c) { return ad5380_remove(&i2c->dev); } @@ -597,7 +601,7 @@ static struct i2c_driver ad5380_i2c_driver = { .owner = THIS_MODULE, }, .probe = ad5380_i2c_probe, - .remove = __devexit_p(ad5380_i2c_remove), + .remove = ad5380_i2c_remove, .id_table = ad5380_i2c_ids, }; diff --git a/drivers/iio/dac/ad5421.c b/drivers/iio/dac/ad5421.c index cdbc5bf25c31..6b86a638dad0 100644 --- a/drivers/iio/dac/ad5421.c +++ b/drivers/iio/dac/ad5421.c @@ -127,7 +127,6 @@ static int ad5421_write(struct iio_dev *indio_dev, unsigned int reg, static int ad5421_read(struct iio_dev *indio_dev, unsigned int reg) { struct ad5421_state *st = iio_priv(indio_dev); - struct spi_message m; int ret; struct spi_transfer t[] = { { @@ -140,15 +139,11 @@ static int ad5421_read(struct iio_dev *indio_dev, unsigned int reg) }, }; - spi_message_init(&m); - spi_message_add_tail(&t[0], &m); - spi_message_add_tail(&t[1], &m); - mutex_lock(&indio_dev->mlock); st->data[0].d32 = cpu_to_be32((1 << 23) | (reg << 16)); - ret = spi_sync(st->spi, &m); + ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t)); if (ret >= 0) ret = be32_to_cpu(st->data[1].d32) & 0xffff; @@ -449,7 +444,7 @@ static const struct iio_info ad5421_info = { .driver_module = THIS_MODULE, }; -static int __devinit ad5421_probe(struct spi_device *spi) +static int ad5421_probe(struct spi_device *spi) { struct ad5421_platform_data *pdata = dev_get_platdata(&spi->dev); struct iio_dev *indio_dev; @@ -516,7 +511,7 @@ error_free: return ret; } -static int __devexit ad5421_remove(struct spi_device *spi) +static int ad5421_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); @@ -534,7 +529,7 @@ static struct spi_driver ad5421_driver = { .owner = THIS_MODULE, }, .probe = ad5421_probe, - .remove = __devexit_p(ad5421_remove), + .remove = ad5421_remove, }; module_spi_driver(ad5421_driver); diff --git a/drivers/iio/dac/ad5446.c b/drivers/iio/dac/ad5446.c index 3310cbbd41e7..f5583aedfb59 100644 --- a/drivers/iio/dac/ad5446.c +++ b/drivers/iio/dac/ad5446.c @@ -212,8 +212,8 @@ static const struct iio_info ad5446_info = { .driver_module = THIS_MODULE, }; -static int __devinit ad5446_probe(struct device *dev, const char *name, - const struct ad5446_chip_info *chip_info) +static int ad5446_probe(struct device *dev, const char *name, + const struct ad5446_chip_info *chip_info) { struct ad5446_state *st; struct iio_dev *indio_dev; @@ -226,7 +226,11 @@ static int __devinit ad5446_probe(struct device *dev, const char *name, if (ret) goto error_put_reg; - voltage_uv = regulator_get_voltage(reg); + ret = regulator_get_voltage(reg); + if (ret < 0) + goto error_disable_reg; + + voltage_uv = ret; } indio_dev = iio_device_alloc(sizeof(*st)); @@ -461,7 +465,7 @@ static const struct spi_device_id ad5446_spi_ids[] = { }; MODULE_DEVICE_TABLE(spi, ad5446_spi_ids); -static int __devinit ad5446_spi_probe(struct spi_device *spi) +static int ad5446_spi_probe(struct spi_device *spi) { const struct spi_device_id *id = spi_get_device_id(spi); @@ -469,7 +473,7 @@ static int __devinit ad5446_spi_probe(struct spi_device *spi) &ad5446_spi_chip_info[id->driver_data]); } -static int __devexit ad5446_spi_remove(struct spi_device *spi) +static int ad5446_spi_remove(struct spi_device *spi) { return ad5446_remove(&spi->dev); } @@ -480,7 +484,7 @@ static struct spi_driver ad5446_spi_driver = { .owner = THIS_MODULE, }, .probe = ad5446_spi_probe, - .remove = __devexit_p(ad5446_spi_remove), + .remove = ad5446_spi_remove, .id_table = ad5446_spi_ids, }; @@ -539,14 +543,14 @@ static const struct ad5446_chip_info ad5446_i2c_chip_info[] = { }, }; -static int __devinit ad5446_i2c_probe(struct i2c_client *i2c, - const struct i2c_device_id *id) +static int ad5446_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) { return ad5446_probe(&i2c->dev, id->name, &ad5446_i2c_chip_info[id->driver_data]); } -static int __devexit ad5446_i2c_remove(struct i2c_client *i2c) +static int ad5446_i2c_remove(struct i2c_client *i2c) { return ad5446_remove(&i2c->dev); } @@ -568,7 +572,7 @@ static struct i2c_driver ad5446_i2c_driver = { .owner = THIS_MODULE, }, .probe = ad5446_i2c_probe, - .remove = __devexit_p(ad5446_i2c_remove), + .remove = ad5446_i2c_remove, .id_table = ad5446_i2c_ids, }; diff --git a/drivers/iio/dac/ad5449.c b/drivers/iio/dac/ad5449.c new file mode 100644 index 000000000000..c4731b7b577b --- /dev/null +++ b/drivers/iio/dac/ad5449.c @@ -0,0 +1,376 @@ +/* + * AD5415, AD5426, AD5429, AD5432, AD5439, AD5443, AD5449 Digital to Analog + * Converter driver. + * + * Copyright 2012 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> + * + * Licensed under the GPL-2. + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/regulator/consumer.h> +#include <asm/unaligned.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> + +#include <linux/platform_data/ad5449.h> + +#define AD5449_MAX_CHANNELS 2 +#define AD5449_MAX_VREFS 2 + +#define AD5449_CMD_NOOP 0x0 +#define AD5449_CMD_LOAD_AND_UPDATE(x) (0x1 + (x) * 3) +#define AD5449_CMD_READ(x) (0x2 + (x) * 3) +#define AD5449_CMD_LOAD(x) (0x3 + (x) * 3) +#define AD5449_CMD_CTRL 13 + +#define AD5449_CTRL_SDO_OFFSET 10 +#define AD5449_CTRL_DAISY_CHAIN BIT(9) +#define AD5449_CTRL_HCLR_TO_MIDSCALE BIT(8) +#define AD5449_CTRL_SAMPLE_RISING BIT(7) + +/** + * struct ad5449_chip_info - chip specific information + * @channels: Channel specification + * @num_channels: Number of channels + * @has_ctrl: Chip has a control register + */ +struct ad5449_chip_info { + const struct iio_chan_spec *channels; + unsigned int num_channels; + bool has_ctrl; +}; + +/** + * struct ad5449 - driver instance specific data + * @spi: the SPI device for this driver instance + * @chip_info: chip model specific constants, available modes etc + * @vref_reg: vref supply regulators + * @has_sdo: whether the SDO line is connected + * @dac_cache: Cache for the DAC values + * @data: spi transfer buffers + */ +struct ad5449 { + struct spi_device *spi; + const struct ad5449_chip_info *chip_info; + struct regulator_bulk_data vref_reg[AD5449_MAX_VREFS]; + + bool has_sdo; + uint16_t dac_cache[AD5449_MAX_CHANNELS]; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + __be16 data[2] ____cacheline_aligned; +}; + +enum ad5449_type { + ID_AD5426, + ID_AD5429, + ID_AD5432, + ID_AD5439, + ID_AD5443, + ID_AD5449, +}; + +static int ad5449_write(struct iio_dev *indio_dev, unsigned int addr, + unsigned int val) +{ + struct ad5449 *st = iio_priv(indio_dev); + int ret; + + mutex_lock(&indio_dev->mlock); + st->data[0] = cpu_to_be16((addr << 12) | val); + ret = spi_write(st->spi, st->data, 2); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad5449_read(struct iio_dev *indio_dev, unsigned int addr, + unsigned int *val) +{ + struct ad5449 *st = iio_priv(indio_dev); + int ret; + struct spi_message msg; + struct spi_transfer t[] = { + { + .tx_buf = &st->data[0], + .len = 2, + .cs_change = 1, + }, { + .tx_buf = &st->data[1], + .rx_buf = &st->data[1], + .len = 2, + }, + }; + + spi_message_init(&msg); + spi_message_add_tail(&t[0], &msg); + spi_message_add_tail(&t[1], &msg); + + mutex_lock(&indio_dev->mlock); + st->data[0] = cpu_to_be16(addr << 12); + st->data[1] = cpu_to_be16(AD5449_CMD_NOOP); + + ret = spi_sync(st->spi, &msg); + if (ret < 0) + goto out_unlock; + + *val = be16_to_cpu(st->data[1]); + +out_unlock: + mutex_unlock(&indio_dev->mlock); + return ret; +} + +static int ad5449_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, int *val2, long info) +{ + struct ad5449 *st = iio_priv(indio_dev); + struct regulator_bulk_data *reg; + int scale_uv; + int ret; + + switch (info) { + case IIO_CHAN_INFO_RAW: + if (st->has_sdo) { + ret = ad5449_read(indio_dev, + AD5449_CMD_READ(chan->address), val); + if (ret) + return ret; + *val &= 0xfff; + } else { + *val = st->dac_cache[chan->address]; + } + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + reg = &st->vref_reg[chan->channel]; + scale_uv = regulator_get_voltage(reg->consumer); + if (scale_uv < 0) + return scale_uv; + + *val = scale_uv / 1000; + *val2 = chan->scan_type.realbits; + + return IIO_VAL_FRACTIONAL_LOG2; + default: + break; + } + + return -EINVAL; +} + +static int ad5449_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long info) +{ + struct ad5449 *st = iio_priv(indio_dev); + int ret; + + switch (info) { + case IIO_CHAN_INFO_RAW: + if (val < 0 || val >= (1 << chan->scan_type.realbits)) + return -EINVAL; + + ret = ad5449_write(indio_dev, + AD5449_CMD_LOAD_AND_UPDATE(chan->address), + val << chan->scan_type.shift); + if (ret == 0) + st->dac_cache[chan->address] = val; + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static const struct iio_info ad5449_info = { + .read_raw = ad5449_read_raw, + .write_raw = ad5449_write_raw, + .driver_module = THIS_MODULE, +}; + +#define AD5449_CHANNEL(chan, bits) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .output = 1, \ + .channel = (chan), \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ + .address = (chan), \ + .scan_type = IIO_ST('u', (bits), 16, 12 - (bits)), \ +} + +#define DECLARE_AD5449_CHANNELS(name, bits) \ +const struct iio_chan_spec name[] = { \ + AD5449_CHANNEL(0, bits), \ + AD5449_CHANNEL(1, bits), \ +} + +static DECLARE_AD5449_CHANNELS(ad5429_channels, 8); +static DECLARE_AD5449_CHANNELS(ad5439_channels, 10); +static DECLARE_AD5449_CHANNELS(ad5449_channels, 12); + +static const struct ad5449_chip_info ad5449_chip_info[] = { + [ID_AD5426] = { + .channels = ad5429_channels, + .num_channels = 1, + .has_ctrl = false, + }, + [ID_AD5429] = { + .channels = ad5429_channels, + .num_channels = 2, + .has_ctrl = true, + }, + [ID_AD5432] = { + .channels = ad5439_channels, + .num_channels = 1, + .has_ctrl = false, + }, + [ID_AD5439] = { + .channels = ad5439_channels, + .num_channels = 2, + .has_ctrl = true, + }, + [ID_AD5443] = { + .channels = ad5449_channels, + .num_channels = 1, + .has_ctrl = false, + }, + [ID_AD5449] = { + .channels = ad5449_channels, + .num_channels = 2, + .has_ctrl = true, + }, +}; + +static const char *ad5449_vref_name(struct ad5449 *st, int n) +{ + if (st->chip_info->num_channels == 1) + return "VREF"; + + if (n == 0) + return "VREFA"; + else + return "VREFB"; +} + +static int ad5449_spi_probe(struct spi_device *spi) +{ + struct ad5449_platform_data *pdata = spi->dev.platform_data; + const struct spi_device_id *id = spi_get_device_id(spi); + struct iio_dev *indio_dev; + struct ad5449 *st; + unsigned int i; + int ret; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) + return -ENOMEM; + + st = iio_priv(indio_dev); + spi_set_drvdata(spi, indio_dev); + + st->chip_info = &ad5449_chip_info[id->driver_data]; + st->spi = spi; + + for (i = 0; i < st->chip_info->num_channels; ++i) + st->vref_reg[i].supply = ad5449_vref_name(st, i); + + ret = regulator_bulk_get(&spi->dev, st->chip_info->num_channels, + st->vref_reg); + if (ret) + goto error_free; + + ret = regulator_bulk_enable(st->chip_info->num_channels, st->vref_reg); + if (ret) + goto error_free_reg; + + indio_dev->dev.parent = &spi->dev; + indio_dev->name = id->name; + indio_dev->info = &ad5449_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = st->chip_info->channels; + indio_dev->num_channels = st->chip_info->num_channels; + + if (st->chip_info->has_ctrl) { + unsigned int ctrl = 0x00; + if (pdata) { + if (pdata->hardware_clear_to_midscale) + ctrl |= AD5449_CTRL_HCLR_TO_MIDSCALE; + ctrl |= pdata->sdo_mode << AD5449_CTRL_SDO_OFFSET; + st->has_sdo = pdata->sdo_mode != AD5449_SDO_DISABLED; + } else { + st->has_sdo = true; + } + ad5449_write(indio_dev, AD5449_CMD_CTRL, ctrl); + } + + ret = iio_device_register(indio_dev); + if (ret) + goto error_disable_reg; + + return 0; + +error_disable_reg: + regulator_bulk_disable(st->chip_info->num_channels, st->vref_reg); +error_free_reg: + regulator_bulk_free(st->chip_info->num_channels, st->vref_reg); +error_free: + iio_device_free(indio_dev); + + return ret; +} + +static int ad5449_spi_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad5449 *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + + regulator_bulk_disable(st->chip_info->num_channels, st->vref_reg); + regulator_bulk_free(st->chip_info->num_channels, st->vref_reg); + + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id ad5449_spi_ids[] = { + { "ad5415", ID_AD5449 }, + { "ad5426", ID_AD5426 }, + { "ad5429", ID_AD5429 }, + { "ad5432", ID_AD5432 }, + { "ad5439", ID_AD5439 }, + { "ad5443", ID_AD5443 }, + { "ad5449", ID_AD5449 }, + {} +}; +MODULE_DEVICE_TABLE(spi, ad5449_spi_ids); + +static struct spi_driver ad5449_spi_driver = { + .driver = { + .name = "ad5449", + .owner = THIS_MODULE, + }, + .probe = ad5449_spi_probe, + .remove = ad5449_spi_remove, + .id_table = ad5449_spi_ids, +}; +module_spi_driver(ad5449_spi_driver); + +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("Analog Devices AD5449 and similar DACs"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/ad5504.c b/drivers/iio/dac/ad5504.c index 242bdc7d0044..e5e59749f109 100644 --- a/drivers/iio/dac/ad5504.c +++ b/drivers/iio/dac/ad5504.c @@ -85,11 +85,7 @@ static int ad5504_spi_read(struct spi_device *spi, u8 addr) .rx_buf = &val, .len = 2, }; - struct spi_message m; - - spi_message_init(&m); - spi_message_add_tail(&t, &m); - ret = spi_sync(spi, &m); + ret = spi_sync_transfer(spi, &t, 1); if (ret < 0) return ret; @@ -277,7 +273,7 @@ static const struct iio_chan_spec ad5504_channels[] = { AD5504_CHANNEL(3), }; -static int __devinit ad5504_probe(struct spi_device *spi) +static int ad5504_probe(struct spi_device *spi) { struct ad5504_platform_data *pdata = spi->dev.platform_data; struct iio_dev *indio_dev; @@ -296,7 +292,11 @@ static int __devinit ad5504_probe(struct spi_device *spi) if (ret) goto error_put_reg; - voltage_uv = regulator_get_voltage(reg); + ret = regulator_get_voltage(reg); + if (ret < 0) + goto error_disable_reg; + + voltage_uv = ret; } spi_set_drvdata(spi, indio_dev); @@ -352,7 +352,7 @@ error_ret: return ret; } -static int __devexit ad5504_remove(struct spi_device *spi) +static int ad5504_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad5504_state *st = iio_priv(indio_dev); @@ -383,7 +383,7 @@ static struct spi_driver ad5504_driver = { .owner = THIS_MODULE, }, .probe = ad5504_probe, - .remove = __devexit_p(ad5504_remove), + .remove = ad5504_remove, .id_table = ad5504_id, }; module_spi_driver(ad5504_driver); diff --git a/drivers/iio/dac/ad5624r_spi.c b/drivers/iio/dac/ad5624r_spi.c index 6a7d6a48cc6d..f6e116627b71 100644 --- a/drivers/iio/dac/ad5624r_spi.c +++ b/drivers/iio/dac/ad5624r_spi.c @@ -220,7 +220,7 @@ static const struct ad5624r_chip_info ad5624r_chip_info_tbl[] = { }, }; -static int __devinit ad5624r_probe(struct spi_device *spi) +static int ad5624r_probe(struct spi_device *spi) { struct ad5624r_state *st; struct iio_dev *indio_dev; @@ -238,7 +238,11 @@ static int __devinit ad5624r_probe(struct spi_device *spi) if (ret) goto error_put_reg; - voltage_uv = regulator_get_voltage(st->reg); + ret = regulator_get_voltage(st->reg); + if (ret < 0) + goto error_disable_reg; + + voltage_uv = ret; } spi_set_drvdata(spi, indio_dev); @@ -282,7 +286,7 @@ error_ret: return ret; } -static int __devexit ad5624r_remove(struct spi_device *spi) +static int ad5624r_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad5624r_state *st = iio_priv(indio_dev); @@ -314,7 +318,7 @@ static struct spi_driver ad5624r_driver = { .owner = THIS_MODULE, }, .probe = ad5624r_probe, - .remove = __devexit_p(ad5624r_remove), + .remove = ad5624r_remove, .id_table = ad5624r_id, }; module_spi_driver(ad5624r_driver); diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c index 6948d75e1036..5e554af21703 100644 --- a/drivers/iio/dac/ad5686.c +++ b/drivers/iio/dac/ad5686.c @@ -117,18 +117,13 @@ static int ad5686_spi_read(struct ad5686_state *st, u8 addr) .len = 3, }, }; - struct spi_message m; int ret; - spi_message_init(&m); - spi_message_add_tail(&t[0], &m); - spi_message_add_tail(&t[1], &m); - st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_READBACK_ENABLE) | AD5686_ADDR(addr)); st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP)); - ret = spi_sync(st->spi, &m); + ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t)); if (ret < 0) return ret; @@ -188,7 +183,7 @@ static ssize_t ad5686_write_dac_powerdown(struct iio_dev *indio_dev, if (ret) return ret; - if (readin == true) + if (readin) st->pwr_down_mask |= (0x3 << (chan->channel * 2)); else st->pwr_down_mask &= ~(0x3 << (chan->channel * 2)); @@ -313,7 +308,7 @@ static const struct ad5686_chip_info ad5686_chip_info_tbl[] = { }; -static int __devinit ad5686_probe(struct spi_device *spi) +static int ad5686_probe(struct spi_device *spi) { struct ad5686_state *st; struct iio_dev *indio_dev; @@ -332,7 +327,11 @@ static int __devinit ad5686_probe(struct spi_device *spi) if (ret) goto error_put_reg; - voltage_uv = regulator_get_voltage(st->reg); + ret = regulator_get_voltage(st->reg); + if (ret < 0) + goto error_disable_reg; + + voltage_uv = ret; } st->chip_info = @@ -379,7 +378,7 @@ error_put_reg: return ret; } -static int __devexit ad5686_remove(struct spi_device *spi) +static int ad5686_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad5686_state *st = iio_priv(indio_dev); @@ -408,7 +407,7 @@ static struct spi_driver ad5686_driver = { .owner = THIS_MODULE, }, .probe = ad5686_probe, - .remove = __devexit_p(ad5686_remove), + .remove = ad5686_remove, .id_table = ad5686_id, }; module_spi_driver(ad5686_driver); diff --git a/drivers/iio/dac/ad5755.c b/drivers/iio/dac/ad5755.c index 5db3506034c5..71faabc6b14e 100644 --- a/drivers/iio/dac/ad5755.c +++ b/drivers/iio/dac/ad5755.c @@ -153,7 +153,6 @@ static int ad5755_write_ctrl(struct iio_dev *indio_dev, unsigned int channel, static int ad5755_read(struct iio_dev *indio_dev, unsigned int addr) { struct ad5755_state *st = iio_priv(indio_dev); - struct spi_message m; int ret; struct spi_transfer t[] = { { @@ -167,16 +166,12 @@ static int ad5755_read(struct iio_dev *indio_dev, unsigned int addr) }, }; - spi_message_init(&m); - spi_message_add_tail(&t[0], &m); - spi_message_add_tail(&t[1], &m); - mutex_lock(&indio_dev->mlock); st->data[0].d32 = cpu_to_be32(AD5755_READ_FLAG | (addr << 16)); st->data[1].d32 = cpu_to_be32(AD5755_NOOP); - ret = spi_sync(st->spi, &m); + ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t)); if (ret >= 0) ret = be32_to_cpu(st->data[1].d32) & 0xffff; @@ -447,8 +442,8 @@ static bool ad5755_is_valid_mode(struct ad5755_state *st, enum ad5755_mode mode) } } -static int __devinit ad5755_setup_pdata(struct iio_dev *indio_dev, - const struct ad5755_platform_data *pdata) +static int ad5755_setup_pdata(struct iio_dev *indio_dev, + const struct ad5755_platform_data *pdata) { struct ad5755_state *st = iio_priv(indio_dev); unsigned int val; @@ -503,7 +498,7 @@ static int __devinit ad5755_setup_pdata(struct iio_dev *indio_dev, return 0; } -static bool __devinit ad5755_is_voltage_mode(enum ad5755_mode mode) +static bool ad5755_is_voltage_mode(enum ad5755_mode mode) { switch (mode) { case AD5755_MODE_VOLTAGE_0V_5V: @@ -516,8 +511,8 @@ static bool __devinit ad5755_is_voltage_mode(enum ad5755_mode mode) } } -static int __devinit ad5755_init_channels(struct iio_dev *indio_dev, - const struct ad5755_platform_data *pdata) +static int ad5755_init_channels(struct iio_dev *indio_dev, + const struct ad5755_platform_data *pdata) { struct ad5755_state *st = iio_priv(indio_dev); struct iio_chan_spec *channels = st->channels; @@ -562,7 +557,7 @@ static const struct ad5755_platform_data ad5755_default_pdata = { }, }; -static int __devinit ad5755_probe(struct spi_device *spi) +static int ad5755_probe(struct spi_device *spi) { enum ad5755_type type = spi_get_device_id(spi)->driver_data; const struct ad5755_platform_data *pdata = dev_get_platdata(&spi->dev); @@ -614,7 +609,7 @@ error_free: return ret; } -static int __devexit ad5755_remove(struct spi_device *spi) +static int ad5755_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); @@ -640,7 +635,7 @@ static struct spi_driver ad5755_driver = { .owner = THIS_MODULE, }, .probe = ad5755_probe, - .remove = __devexit_p(ad5755_remove), + .remove = ad5755_remove, .id_table = ad5755_id, }; module_spi_driver(ad5755_driver); diff --git a/drivers/iio/dac/ad5764.c b/drivers/iio/dac/ad5764.c index ffce30447445..5b7acd3a2c77 100644 --- a/drivers/iio/dac/ad5764.c +++ b/drivers/iio/dac/ad5764.c @@ -135,7 +135,6 @@ static int ad5764_read(struct iio_dev *indio_dev, unsigned int reg, unsigned int *val) { struct ad5764_state *st = iio_priv(indio_dev); - struct spi_message m; int ret; struct spi_transfer t[] = { { @@ -148,15 +147,11 @@ static int ad5764_read(struct iio_dev *indio_dev, unsigned int reg, }, }; - spi_message_init(&m); - spi_message_add_tail(&t[0], &m); - spi_message_add_tail(&t[1], &m); - mutex_lock(&indio_dev->mlock); st->data[0].d32 = cpu_to_be32((1 << 23) | (reg << 16)); - ret = spi_sync(st->spi, &m); + ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t)); if (ret >= 0) *val = be32_to_cpu(st->data[1].d32) & 0xffff; @@ -273,7 +268,7 @@ static const struct iio_info ad5764_info = { .driver_module = THIS_MODULE, }; -static int __devinit ad5764_probe(struct spi_device *spi) +static int ad5764_probe(struct spi_device *spi) { enum ad5764_type type = spi_get_device_id(spi)->driver_data; struct iio_dev *indio_dev; @@ -340,7 +335,7 @@ error_free: return ret; } -static int __devexit ad5764_remove(struct spi_device *spi) +static int ad5764_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad5764_state *st = iio_priv(indio_dev); @@ -372,7 +367,7 @@ static struct spi_driver ad5764_driver = { .owner = THIS_MODULE, }, .probe = ad5764_probe, - .remove = __devexit_p(ad5764_remove), + .remove = ad5764_remove, .id_table = ad5764_ids, }; module_spi_driver(ad5764_driver); diff --git a/drivers/iio/dac/ad5791.c b/drivers/iio/dac/ad5791.c index 2bd2e37280ff..8dfd3da8a07b 100644 --- a/drivers/iio/dac/ad5791.c +++ b/drivers/iio/dac/ad5791.c @@ -125,7 +125,6 @@ static int ad5791_spi_read(struct spi_device *spi, u8 addr, u32 *val) u8 d8[4]; } data[3]; int ret; - struct spi_message msg; struct spi_transfer xfers[] = { { .tx_buf = &data[0].d8[1], @@ -144,10 +143,7 @@ static int ad5791_spi_read(struct spi_device *spi, u8 addr, u32 *val) AD5791_ADDR(addr)); data[1].d32 = cpu_to_be32(AD5791_ADDR(AD5791_ADDR_NOOP)); - spi_message_init(&msg); - spi_message_add_tail(&xfers[0], &msg); - spi_message_add_tail(&xfers[1], &msg); - ret = spi_sync(spi, &msg); + ret = spi_sync_transfer(spi, xfers, ARRAY_SIZE(xfers)); *val = be32_to_cpu(data[2].d32); @@ -346,7 +342,7 @@ static const struct iio_info ad5791_info = { .driver_module = THIS_MODULE, }; -static int __devinit ad5791_probe(struct spi_device *spi) +static int ad5791_probe(struct spi_device *spi) { struct ad5791_platform_data *pdata = spi->dev.platform_data; struct iio_dev *indio_dev; @@ -365,7 +361,11 @@ static int __devinit ad5791_probe(struct spi_device *spi) if (ret) goto error_put_reg_pos; - pos_voltage_uv = regulator_get_voltage(st->reg_vdd); + ret = regulator_get_voltage(st->reg_vdd); + if (ret < 0) + goto error_disable_reg_pos; + + pos_voltage_uv = ret; } st->reg_vss = regulator_get(&spi->dev, "vss"); @@ -374,7 +374,11 @@ static int __devinit ad5791_probe(struct spi_device *spi) if (ret) goto error_put_reg_neg; - neg_voltage_uv = regulator_get_voltage(st->reg_vss); + ret = regulator_get_voltage(st->reg_vss); + if (ret < 0) + goto error_disable_reg_neg; + + neg_voltage_uv = ret; } st->pwr_down = true; @@ -428,6 +432,7 @@ error_put_reg_neg: if (!IS_ERR(st->reg_vss)) regulator_put(st->reg_vss); +error_disable_reg_pos: if (!IS_ERR(st->reg_vdd)) regulator_disable(st->reg_vdd); error_put_reg_pos: @@ -439,7 +444,7 @@ error_ret: return ret; } -static int __devexit ad5791_remove(struct spi_device *spi) +static int ad5791_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad5791_state *st = iio_priv(indio_dev); @@ -475,7 +480,7 @@ static struct spi_driver ad5791_driver = { .owner = THIS_MODULE, }, .probe = ad5791_probe, - .remove = __devexit_p(ad5791_remove), + .remove = ad5791_remove, .id_table = ad5791_id, }; module_spi_driver(ad5791_driver); diff --git a/drivers/iio/dac/max517.c b/drivers/iio/dac/max517.c index c3d748c25939..352abe2004a4 100644 --- a/drivers/iio/dac/max517.c +++ b/drivers/iio/dac/max517.c @@ -156,7 +156,7 @@ static const struct iio_chan_spec max517_channels[] = { MAX517_CHANNEL(1) }; -static int __devinit max517_probe(struct i2c_client *client, +static int max517_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct max517_data *data; @@ -210,7 +210,7 @@ exit: return err; } -static int __devexit max517_remove(struct i2c_client *client) +static int max517_remove(struct i2c_client *client) { iio_device_unregister(i2c_get_clientdata(client)); iio_device_free(i2c_get_clientdata(client)); @@ -232,7 +232,7 @@ static struct i2c_driver max517_driver = { .pm = MAX517_PM_OPS, }, .probe = max517_probe, - .remove = __devexit_p(max517_remove), + .remove = max517_remove, .id_table = max517_id, }; module_i2c_driver(max517_driver); diff --git a/drivers/iio/dac/mcp4725.c b/drivers/iio/dac/mcp4725.c index e0e168bd5b45..8f88cc4059a2 100644 --- a/drivers/iio/dac/mcp4725.c +++ b/drivers/iio/dac/mcp4725.c @@ -141,8 +141,8 @@ static const struct iio_info mcp4725_info = { .driver_module = THIS_MODULE, }; -static int __devinit mcp4725_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int mcp4725_probe(struct i2c_client *client, + const struct i2c_device_id *id) { struct mcp4725_data *data; struct iio_dev *indio_dev; @@ -195,7 +195,7 @@ exit: return err; } -static int __devexit mcp4725_remove(struct i2c_client *client) +static int mcp4725_remove(struct i2c_client *client) { struct iio_dev *indio_dev = i2c_get_clientdata(client); @@ -217,7 +217,7 @@ static struct i2c_driver mcp4725_driver = { .pm = MCP4725_PM_OPS, }, .probe = mcp4725_probe, - .remove = __devexit_p(mcp4725_remove), + .remove = mcp4725_remove, .id_table = mcp4725_id, }; module_i2c_driver(mcp4725_driver); diff --git a/drivers/iio/frequency/ad9523.c b/drivers/iio/frequency/ad9523.c index b737c64a402d..1ea132e239ea 100644 --- a/drivers/iio/frequency/ad9523.c +++ b/drivers/iio/frequency/ad9523.c @@ -287,7 +287,6 @@ struct ad9523_state { static int ad9523_read(struct iio_dev *indio_dev, unsigned addr) { struct ad9523_state *st = iio_priv(indio_dev); - struct spi_message m; int ret; /* We encode the register size 1..3 bytes into the register address. @@ -305,15 +304,11 @@ static int ad9523_read(struct iio_dev *indio_dev, unsigned addr) }, }; - spi_message_init(&m); - spi_message_add_tail(&t[0], &m); - spi_message_add_tail(&t[1], &m); - st->data[0].d32 = cpu_to_be32(AD9523_READ | AD9523_CNT(AD9523_TRANSF_LEN(addr)) | AD9523_ADDR(addr)); - ret = spi_sync(st->spi, &m); + ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t)); if (ret < 0) dev_err(&indio_dev->dev, "read failed (%d)", ret); else @@ -326,7 +321,6 @@ static int ad9523_read(struct iio_dev *indio_dev, unsigned addr) static int ad9523_write(struct iio_dev *indio_dev, unsigned addr, unsigned val) { struct ad9523_state *st = iio_priv(indio_dev); - struct spi_message m; int ret; struct spi_transfer t[] = { { @@ -338,16 +332,12 @@ static int ad9523_write(struct iio_dev *indio_dev, unsigned addr, unsigned val) }, }; - spi_message_init(&m); - spi_message_add_tail(&t[0], &m); - spi_message_add_tail(&t[1], &m); - st->data[0].d32 = cpu_to_be32(AD9523_WRITE | AD9523_CNT(AD9523_TRANSF_LEN(addr)) | AD9523_ADDR(addr)); st->data[1].d32 = cpu_to_be32(val); - ret = spi_sync(st->spi, &m); + ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t)); if (ret < 0) dev_err(&indio_dev->dev, "write failed (%d)", ret); @@ -959,7 +949,7 @@ static int ad9523_setup(struct iio_dev *indio_dev) return 0; } -static int __devinit ad9523_probe(struct spi_device *spi) +static int ad9523_probe(struct spi_device *spi) { struct ad9523_platform_data *pdata = spi->dev.platform_data; struct iio_dev *indio_dev; @@ -1020,7 +1010,7 @@ error_put_reg: return ret; } -static int __devexit ad9523_remove(struct spi_device *spi) +static int ad9523_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad9523_state *st = iio_priv(indio_dev); @@ -1049,7 +1039,7 @@ static struct spi_driver ad9523_driver = { .owner = THIS_MODULE, }, .probe = ad9523_probe, - .remove = __devexit_p(ad9523_remove), + .remove = ad9523_remove, .id_table = ad9523_id, }; module_spi_driver(ad9523_driver); diff --git a/drivers/iio/frequency/adf4350.c b/drivers/iio/frequency/adf4350.c index e35bb8f6fe75..a884252ac66b 100644 --- a/drivers/iio/frequency/adf4350.c +++ b/drivers/iio/frequency/adf4350.c @@ -173,7 +173,7 @@ static int adf4350_set_freq(struct adf4350_state *st, unsigned long long freq) } while ((st->r1_mod > ADF4350_MAX_MODULUS) && r_cnt); } while (r_cnt == 0); - tmp = freq * (u64)st->r1_mod + (st->fpfd > 1); + tmp = freq * (u64)st->r1_mod + (st->fpfd >> 1); do_div(tmp, st->fpfd); /* Div round closest (n + d/2)/d */ st->r0_fract = do_div(tmp, st->r1_mod); st->r0_int = tmp; @@ -355,7 +355,7 @@ static const struct iio_info adf4350_info = { .driver_module = THIS_MODULE, }; -static int __devinit adf4350_probe(struct spi_device *spi) +static int adf4350_probe(struct spi_device *spi) { struct adf4350_platform_data *pdata = spi->dev.platform_data; struct iio_dev *indio_dev; @@ -440,7 +440,7 @@ error_put_reg: return ret; } -static int __devexit adf4350_remove(struct spi_device *spi) +static int adf4350_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct adf4350_state *st = iio_priv(indio_dev); @@ -476,7 +476,7 @@ static struct spi_driver adf4350_driver = { .owner = THIS_MODULE, }, .probe = adf4350_probe, - .remove = __devexit_p(adf4350_remove), + .remove = adf4350_remove, .id_table = adf4350_id, }; module_spi_driver(adf4350_driver); diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig index 21e27e2fc68c..6be4628faffe 100644 --- a/drivers/iio/gyro/Kconfig +++ b/drivers/iio/gyro/Kconfig @@ -3,14 +3,79 @@ # menu "Digital gyroscope sensors" +config ADIS16080 + tristate "Analog Devices ADIS16080/100 Yaw Rate Gyroscope with SPI driver" + depends on SPI + help + Say yes here to build support for Analog Devices ADIS16080, ADIS16100 Yaw + Rate Gyroscope with SPI. + +config ADIS16136 + tristate "Analog devices ADIS16136 and similar gyroscopes driver" + depends on SPI_MASTER + select IIO_ADIS_LIB + select IIO_ADIS_LIB_BUFFER if IIO_BUFFER + help + Say yes here to build support for the Analog Devices ADIS16133, ADIS16135, + ADIS16136 gyroscope devices. + +config ADXRS450 + tristate "Analog Devices ADXRS450/3 Digital Output Gyroscope SPI driver" + depends on SPI + help + Say yes here to build support for Analog Devices ADXRS450 and ADXRS453 + programmable digital output gyroscope. + + This driver can also be built as a module. If so, the module + will be called adxrs450. + config HID_SENSOR_GYRO_3D depends on HID_SENSOR_HUB select IIO_BUFFER select IIO_TRIGGERED_BUFFER select HID_SENSOR_IIO_COMMON + select HID_SENSOR_IIO_TRIGGER tristate "HID Gyroscope 3D" help Say yes here to build support for the HID SENSOR Gyroscope 3D. +config IIO_ST_GYRO_3AXIS + tristate "STMicroelectronics gyroscopes 3-Axis Driver" + depends on (I2C || SPI_MASTER) && SYSFS + select IIO_ST_SENSORS_CORE + select IIO_ST_GYRO_I2C_3AXIS if (I2C) + select IIO_ST_GYRO_SPI_3AXIS if (SPI_MASTER) + select IIO_TRIGGERED_BUFFER if (IIO_BUFFER) + select IIO_ST_GYRO_BUFFER if (IIO_TRIGGERED_BUFFER) + help + Say yes here to build support for STMicroelectronics gyroscopes: + L3G4200D, LSM330DL, L3GD20, L3GD20H, LSM330DLC, L3G4IS, LSM330. + + This driver can also be built as a module. If so, will be created + these modules: + - st_gyro (core functions for the driver [it is mandatory]); + - st_gyro_i2c (necessary for the I2C devices [optional*]); + - st_gyro_spi (necessary for the SPI devices [optional*]); + + (*) one of these is necessary to do something. + +config IIO_ST_GYRO_I2C_3AXIS + tristate + depends on IIO_ST_GYRO_3AXIS + depends on IIO_ST_SENSORS_I2C + +config IIO_ST_GYRO_SPI_3AXIS + tristate + depends on IIO_ST_GYRO_3AXIS + depends on IIO_ST_SENSORS_SPI + +config ITG3200 + tristate "InvenSense ITG3200 Digital 3-Axis Gyroscope I2C driver" + depends on I2C + select IIO_TRIGGERED_BUFFER if IIO_BUFFER + help + Say yes here to add support for the InvenSense ITG3200 digital + 3-axis gyroscope sensor. + endmenu diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile index 8a895d9fcbce..225d289082e6 100644 --- a/drivers/iio/gyro/Makefile +++ b/drivers/iio/gyro/Makefile @@ -2,4 +2,19 @@ # Makefile for industrial I/O gyroscope sensor drivers # +obj-$(CONFIG_ADIS16080) += adis16080.o +obj-$(CONFIG_ADIS16136) += adis16136.o +obj-$(CONFIG_ADXRS450) += adxrs450.o + obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o + +itg3200-y := itg3200_core.o +itg3200-$(CONFIG_IIO_BUFFER) += itg3200_buffer.o +obj-$(CONFIG_ITG3200) += itg3200.o + +obj-$(CONFIG_IIO_ST_GYRO_3AXIS) += st_gyro.o +st_gyro-y := st_gyro_core.o +st_gyro-$(CONFIG_IIO_BUFFER) += st_gyro_buffer.o + +obj-$(CONFIG_IIO_ST_GYRO_I2C_3AXIS) += st_gyro_i2c.o +obj-$(CONFIG_IIO_ST_GYRO_SPI_3AXIS) += st_gyro_spi.o diff --git a/drivers/iio/gyro/adis16080.c b/drivers/iio/gyro/adis16080.c new file mode 100644 index 000000000000..1861287911f1 --- /dev/null +++ b/drivers/iio/gyro/adis16080.c @@ -0,0 +1,259 @@ +/* + * ADIS16080/100 Yaw Rate Gyroscope with SPI driver + * + * Copyright 2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ +#include <linux/delay.h> +#include <linux/mutex.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> + +#define ADIS16080_DIN_GYRO (0 << 10) /* Gyroscope output */ +#define ADIS16080_DIN_TEMP (1 << 10) /* Temperature output */ +#define ADIS16080_DIN_AIN1 (2 << 10) +#define ADIS16080_DIN_AIN2 (3 << 10) + +/* + * 1: Write contents on DIN to control register. + * 0: No changes to control register. + */ + +#define ADIS16080_DIN_WRITE (1 << 15) + +struct adis16080_chip_info { + int scale_val; + int scale_val2; +}; + +/** + * struct adis16080_state - device instance specific data + * @us: actual spi_device to write data + * @info: chip specific parameters + * @buf: transmit or receive buffer + **/ +struct adis16080_state { + struct spi_device *us; + const struct adis16080_chip_info *info; + + __be16 buf ____cacheline_aligned; +}; + +static int adis16080_read_sample(struct iio_dev *indio_dev, + u16 addr, int *val) +{ + struct adis16080_state *st = iio_priv(indio_dev); + struct spi_message m; + int ret; + struct spi_transfer t[] = { + { + .tx_buf = &st->buf, + .len = 2, + .cs_change = 1, + }, { + .rx_buf = &st->buf, + .len = 2, + }, + }; + + st->buf = cpu_to_be16(addr | ADIS16080_DIN_WRITE); + + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + + ret = spi_sync(st->us, &m); + if (ret == 0) + *val = sign_extend32(be16_to_cpu(st->buf), 11); + + return ret; +} + +static int adis16080_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long mask) +{ + struct adis16080_state *st = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + mutex_lock(&indio_dev->mlock); + ret = adis16080_read_sample(indio_dev, chan->address, val); + mutex_unlock(&indio_dev->mlock); + return ret ? ret : IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ANGL_VEL: + *val = st->info->scale_val; + *val2 = st->info->scale_val2; + return IIO_VAL_FRACTIONAL; + case IIO_VOLTAGE: + /* VREF = 5V, 12 bits */ + *val = 5000; + *val2 = 12; + return IIO_VAL_FRACTIONAL_LOG2; + case IIO_TEMP: + /* 85 C = 585, 25 C = 0 */ + *val = 85000 - 25000; + *val2 = 585; + return IIO_VAL_FRACTIONAL; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_OFFSET: + switch (chan->type) { + case IIO_VOLTAGE: + /* 2.5 V = 0 */ + *val = 2048; + return IIO_VAL_INT; + case IIO_TEMP: + /* 85 C = 585, 25 C = 0 */ + *val = DIV_ROUND_CLOSEST(25 * 585, 85 - 25); + return IIO_VAL_INT; + default: + return -EINVAL; + } + default: + break; + } + + return -EINVAL; +} + +static const struct iio_chan_spec adis16080_channels[] = { + { + .type = IIO_ANGL_VEL, + .modified = 1, + .channel2 = IIO_MOD_Z, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, + .address = ADIS16080_DIN_GYRO, + }, { + .type = IIO_VOLTAGE, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT, + .address = ADIS16080_DIN_AIN1, + }, { + .type = IIO_VOLTAGE, + .indexed = 1, + .channel = 1, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT, + .address = ADIS16080_DIN_AIN2, + }, { + .type = IIO_TEMP, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT, + .address = ADIS16080_DIN_TEMP, + } +}; + +static const struct iio_info adis16080_info = { + .read_raw = &adis16080_read_raw, + .driver_module = THIS_MODULE, +}; + +enum { + ID_ADIS16080, + ID_ADIS16100, +}; + +static const struct adis16080_chip_info adis16080_chip_info[] = { + [ID_ADIS16080] = { + /* 80 degree = 819, 819 rad = 46925 degree */ + .scale_val = 80, + .scale_val2 = 46925, + }, + [ID_ADIS16100] = { + /* 300 degree = 1230, 1230 rad = 70474 degree */ + .scale_val = 300, + .scale_val2 = 70474, + }, +}; + +static int adis16080_probe(struct spi_device *spi) +{ + const struct spi_device_id *id = spi_get_device_id(spi); + int ret; + struct adis16080_state *st; + struct iio_dev *indio_dev; + + /* setup the industrialio driver allocated elements */ + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + st = iio_priv(indio_dev); + /* this is only used for removal purposes */ + spi_set_drvdata(spi, indio_dev); + + /* Allocate the comms buffers */ + st->us = spi; + st->info = &adis16080_chip_info[id->driver_data]; + + indio_dev->name = spi->dev.driver->name; + indio_dev->channels = adis16080_channels; + indio_dev->num_channels = ARRAY_SIZE(adis16080_channels); + indio_dev->dev.parent = &spi->dev; + indio_dev->info = &adis16080_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_free_dev; + return 0; + +error_free_dev: + iio_device_free(indio_dev); +error_ret: + return ret; +} + +static int adis16080_remove(struct spi_device *spi) +{ + iio_device_unregister(spi_get_drvdata(spi)); + iio_device_free(spi_get_drvdata(spi)); + + return 0; +} + +static const struct spi_device_id adis16080_ids[] = { + { "adis16080", ID_ADIS16080 }, + { "adis16100", ID_ADIS16100 }, + {}, +}; +MODULE_DEVICE_TABLE(spi, adis16080_ids); + +static struct spi_driver adis16080_driver = { + .driver = { + .name = "adis16080", + .owner = THIS_MODULE, + }, + .probe = adis16080_probe, + .remove = adis16080_remove, + .id_table = adis16080_ids, +}; +module_spi_driver(adis16080_driver); + +MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); +MODULE_DESCRIPTION("Analog Devices ADIS16080/100 Yaw Rate Gyroscope Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/gyro/adis16136.c b/drivers/iio/gyro/adis16136.c new file mode 100644 index 000000000000..8cb0bcbfd609 --- /dev/null +++ b/drivers/iio/gyro/adis16136.c @@ -0,0 +1,580 @@ +/* + * ADIS16133/ADIS16135/ADIS16136 gyroscope driver + * + * Copyright 2012 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> + * + * Licensed under the GPL-2. + */ + +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/mutex.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/imu/adis.h> + +#include <linux/debugfs.h> + +#define ADIS16136_REG_FLASH_CNT 0x00 +#define ADIS16136_REG_TEMP_OUT 0x02 +#define ADIS16136_REG_GYRO_OUT2 0x04 +#define ADIS16136_REG_GYRO_OUT 0x06 +#define ADIS16136_REG_GYRO_OFF2 0x08 +#define ADIS16136_REG_GYRO_OFF 0x0A +#define ADIS16136_REG_ALM_MAG1 0x10 +#define ADIS16136_REG_ALM_MAG2 0x12 +#define ADIS16136_REG_ALM_SAMPL1 0x14 +#define ADIS16136_REG_ALM_SAMPL2 0x16 +#define ADIS16136_REG_ALM_CTRL 0x18 +#define ADIS16136_REG_GPIO_CTRL 0x1A +#define ADIS16136_REG_MSC_CTRL 0x1C +#define ADIS16136_REG_SMPL_PRD 0x1E +#define ADIS16136_REG_AVG_CNT 0x20 +#define ADIS16136_REG_DEC_RATE 0x22 +#define ADIS16136_REG_SLP_CTRL 0x24 +#define ADIS16136_REG_DIAG_STAT 0x26 +#define ADIS16136_REG_GLOB_CMD 0x28 +#define ADIS16136_REG_LOT1 0x32 +#define ADIS16136_REG_LOT2 0x34 +#define ADIS16136_REG_LOT3 0x36 +#define ADIS16136_REG_PROD_ID 0x38 +#define ADIS16136_REG_SERIAL_NUM 0x3A + +#define ADIS16136_DIAG_STAT_FLASH_UPDATE_FAIL 2 +#define ADIS16136_DIAG_STAT_SPI_FAIL 3 +#define ADIS16136_DIAG_STAT_SELF_TEST_FAIL 5 +#define ADIS16136_DIAG_STAT_FLASH_CHKSUM_FAIL 6 + +#define ADIS16136_MSC_CTRL_MEMORY_TEST BIT(11) +#define ADIS16136_MSC_CTRL_SELF_TEST BIT(10) + +struct adis16136_chip_info { + unsigned int precision; + unsigned int fullscale; +}; + +struct adis16136 { + const struct adis16136_chip_info *chip_info; + + struct adis adis; +}; + +#ifdef CONFIG_DEBUG_FS + +static ssize_t adis16136_show_serial(struct file *file, + char __user *userbuf, size_t count, loff_t *ppos) +{ + struct adis16136 *adis16136 = file->private_data; + uint16_t lot1, lot2, lot3, serial; + char buf[20]; + size_t len; + int ret; + + ret = adis_read_reg_16(&adis16136->adis, ADIS16136_REG_SERIAL_NUM, + &serial); + if (ret < 0) + return ret; + + ret = adis_read_reg_16(&adis16136->adis, ADIS16136_REG_LOT1, &lot1); + if (ret < 0) + return ret; + + ret = adis_read_reg_16(&adis16136->adis, ADIS16136_REG_LOT2, &lot2); + if (ret < 0) + return ret; + + ret = adis_read_reg_16(&adis16136->adis, ADIS16136_REG_LOT3, &lot3); + if (ret < 0) + return ret; + + len = snprintf(buf, sizeof(buf), "%.4x%.4x%.4x-%.4x\n", lot1, lot2, + lot3, serial); + + return simple_read_from_buffer(userbuf, count, ppos, buf, len); +} + +static const struct file_operations adis16136_serial_fops = { + .open = simple_open, + .read = adis16136_show_serial, + .llseek = default_llseek, + .owner = THIS_MODULE, +}; + +static int adis16136_show_product_id(void *arg, u64 *val) +{ + struct adis16136 *adis16136 = arg; + u16 prod_id; + int ret; + + ret = adis_read_reg_16(&adis16136->adis, ADIS16136_REG_PROD_ID, + &prod_id); + if (ret < 0) + return ret; + + *val = prod_id; + + return 0; +} +DEFINE_SIMPLE_ATTRIBUTE(adis16136_product_id_fops, + adis16136_show_product_id, NULL, "%llu\n"); + +static int adis16136_show_flash_count(void *arg, u64 *val) +{ + struct adis16136 *adis16136 = arg; + uint16_t flash_count; + int ret; + + ret = adis_read_reg_16(&adis16136->adis, ADIS16136_REG_FLASH_CNT, + &flash_count); + if (ret < 0) + return ret; + + *val = flash_count; + + return 0; +} +DEFINE_SIMPLE_ATTRIBUTE(adis16136_flash_count_fops, + adis16136_show_flash_count, NULL, "%lld\n"); + +static int adis16136_debugfs_init(struct iio_dev *indio_dev) +{ + struct adis16136 *adis16136 = iio_priv(indio_dev); + + debugfs_create_file("serial_number", 0400, indio_dev->debugfs_dentry, + adis16136, &adis16136_serial_fops); + debugfs_create_file("product_id", 0400, indio_dev->debugfs_dentry, + adis16136, &adis16136_product_id_fops); + debugfs_create_file("flash_count", 0400, indio_dev->debugfs_dentry, + adis16136, &adis16136_flash_count_fops); + + return 0; +} + +#else + +static int adis16136_debugfs_init(struct iio_dev *indio_dev) +{ + return 0; +} + +#endif + +static int adis16136_set_freq(struct adis16136 *adis16136, unsigned int freq) +{ + unsigned int t; + + t = 32768 / freq; + if (t < 0xf) + t = 0xf; + else if (t > 0xffff) + t = 0xffff; + else + t--; + + return adis_write_reg_16(&adis16136->adis, ADIS16136_REG_SMPL_PRD, t); +} + +static int adis16136_get_freq(struct adis16136 *adis16136, unsigned int *freq) +{ + uint16_t t; + int ret; + + ret = adis_read_reg_16(&adis16136->adis, ADIS16136_REG_SMPL_PRD, &t); + if (ret < 0) + return ret; + + *freq = 32768 / (t + 1); + + return 0; +} + +static ssize_t adis16136_write_frequency(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct adis16136 *adis16136 = iio_priv(indio_dev); + unsigned int val; + int ret; + + ret = kstrtouint(buf, 10, &val); + if (ret) + return ret; + + if (val == 0) + return -EINVAL; + + ret = adis16136_set_freq(adis16136, val); + + return ret ? ret : len; +} + +static ssize_t adis16136_read_frequency(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct adis16136 *adis16136 = iio_priv(indio_dev); + unsigned int freq; + int ret; + + ret = adis16136_get_freq(adis16136, &freq); + if (ret < 0) + return ret; + + return sprintf(buf, "%d\n", freq); +} + +static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, + adis16136_read_frequency, + adis16136_write_frequency); + +static const unsigned adis16136_3db_divisors[] = { + [0] = 2, /* Special case */ + [1] = 6, + [2] = 12, + [3] = 25, + [4] = 50, + [5] = 100, + [6] = 200, + [7] = 200, /* Not a valid setting */ +}; + +static int adis16136_set_filter(struct iio_dev *indio_dev, int val) +{ + struct adis16136 *adis16136 = iio_priv(indio_dev); + unsigned int freq; + int i, ret; + + ret = adis16136_get_freq(adis16136, &freq); + if (ret < 0) + return ret; + + for (i = ARRAY_SIZE(adis16136_3db_divisors) - 1; i >= 1; i--) { + if (freq / adis16136_3db_divisors[i] >= val) + break; + } + + return adis_write_reg_16(&adis16136->adis, ADIS16136_REG_AVG_CNT, i); +} + +static int adis16136_get_filter(struct iio_dev *indio_dev, int *val) +{ + struct adis16136 *adis16136 = iio_priv(indio_dev); + unsigned int freq; + uint16_t val16; + int ret; + + mutex_lock(&indio_dev->mlock); + + ret = adis_read_reg_16(&adis16136->adis, ADIS16136_REG_AVG_CNT, &val16); + if (ret < 0) + goto err_unlock; + + ret = adis16136_get_freq(adis16136, &freq); + if (ret < 0) + goto err_unlock; + + *val = freq / adis16136_3db_divisors[val16 & 0x07]; + +err_unlock: + mutex_unlock(&indio_dev->mlock); + + return ret ? ret : IIO_VAL_INT; +} + +static int adis16136_read_raw(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int *val, int *val2, long info) +{ + struct adis16136 *adis16136 = iio_priv(indio_dev); + uint32_t val32; + int ret; + + switch (info) { + case IIO_CHAN_INFO_RAW: + return adis_single_conversion(indio_dev, chan, 0, val); + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ANGL_VEL: + *val = adis16136->chip_info->precision; + *val2 = (adis16136->chip_info->fullscale << 16); + return IIO_VAL_FRACTIONAL; + case IIO_TEMP: + *val = 10; + *val2 = 697000; /* 0.010697 degree Celsius */ + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_CALIBBIAS: + ret = adis_read_reg_32(&adis16136->adis, + ADIS16136_REG_GYRO_OFF2, &val32); + if (ret < 0) + return ret; + + *val = sign_extend32(val32, 31); + + return IIO_VAL_INT; + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + return adis16136_get_filter(indio_dev, val); + default: + return -EINVAL; + } +} + +static int adis16136_write_raw(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int val, int val2, long info) +{ + struct adis16136 *adis16136 = iio_priv(indio_dev); + + switch (info) { + case IIO_CHAN_INFO_CALIBBIAS: + return adis_write_reg_32(&adis16136->adis, + ADIS16136_REG_GYRO_OFF2, val); + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + return adis16136_set_filter(indio_dev, val); + default: + break; + } + + return -EINVAL; +} + +enum { + ADIS16136_SCAN_GYRO, + ADIS16136_SCAN_TEMP, +}; + +static const struct iio_chan_spec adis16136_channels[] = { + { + .type = IIO_ANGL_VEL, + .modified = 1, + .channel2 = IIO_MOD_X, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT | + IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SEPARATE_BIT, + .address = ADIS16136_REG_GYRO_OUT2, + .scan_index = ADIS16136_SCAN_GYRO, + .scan_type = { + .sign = 's', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_BE, + }, + }, { + .type = IIO_TEMP, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, + .address = ADIS16136_REG_TEMP_OUT, + .scan_index = ADIS16136_SCAN_TEMP, + .scan_type = { + .sign = 's', + .realbits = 16, + .storagebits = 16, + .endianness = IIO_BE, + }, + }, + IIO_CHAN_SOFT_TIMESTAMP(2), +}; + +static struct attribute *adis16136_attributes[] = { + &iio_dev_attr_sampling_frequency.dev_attr.attr, + NULL +}; + +static const struct attribute_group adis16136_attribute_group = { + .attrs = adis16136_attributes, +}; + +static const struct iio_info adis16136_info = { + .driver_module = THIS_MODULE, + .attrs = &adis16136_attribute_group, + .read_raw = &adis16136_read_raw, + .write_raw = &adis16136_write_raw, + .update_scan_mode = adis_update_scan_mode, + .debugfs_reg_access = adis_debugfs_reg_access, +}; + +static int adis16136_stop_device(struct iio_dev *indio_dev) +{ + struct adis16136 *adis16136 = iio_priv(indio_dev); + int ret; + + ret = adis_write_reg_16(&adis16136->adis, ADIS16136_REG_SLP_CTRL, 0xff); + if (ret) + dev_err(&indio_dev->dev, + "Could not power down device: %d\n", ret); + + return ret; +} + +static int adis16136_initial_setup(struct iio_dev *indio_dev) +{ + struct adis16136 *adis16136 = iio_priv(indio_dev); + unsigned int device_id; + uint16_t prod_id; + int ret; + + ret = adis_initial_startup(&adis16136->adis); + if (ret) + return ret; + + ret = adis_read_reg_16(&adis16136->adis, ADIS16136_REG_PROD_ID, + &prod_id); + if (ret) + return ret; + + sscanf(indio_dev->name, "adis%u\n", &device_id); + + if (prod_id != device_id) + dev_warn(&indio_dev->dev, "Device ID(%u) and product ID(%u) do not match.", + device_id, prod_id); + + return 0; +} + +static const char * const adis16136_status_error_msgs[] = { + [ADIS16136_DIAG_STAT_FLASH_UPDATE_FAIL] = "Flash update failed", + [ADIS16136_DIAG_STAT_SPI_FAIL] = "SPI failure", + [ADIS16136_DIAG_STAT_SELF_TEST_FAIL] = "Self test error", + [ADIS16136_DIAG_STAT_FLASH_CHKSUM_FAIL] = "Flash checksum error", +}; + +static const struct adis_data adis16136_data = { + .diag_stat_reg = ADIS16136_REG_DIAG_STAT, + .glob_cmd_reg = ADIS16136_REG_GLOB_CMD, + .msc_ctrl_reg = ADIS16136_REG_MSC_CTRL, + + .self_test_mask = ADIS16136_MSC_CTRL_SELF_TEST, + .startup_delay = 80, + + .read_delay = 10, + .write_delay = 10, + + .status_error_msgs = adis16136_status_error_msgs, + .status_error_mask = BIT(ADIS16136_DIAG_STAT_FLASH_UPDATE_FAIL) | + BIT(ADIS16136_DIAG_STAT_SPI_FAIL) | + BIT(ADIS16136_DIAG_STAT_SELF_TEST_FAIL) | + BIT(ADIS16136_DIAG_STAT_FLASH_CHKSUM_FAIL), +}; + +enum adis16136_id { + ID_ADIS16133, + ID_ADIS16135, + ID_ADIS16136, +}; + +static const struct adis16136_chip_info adis16136_chip_info[] = { + [ID_ADIS16133] = { + .precision = IIO_DEGREE_TO_RAD(1200), + .fullscale = 24000, + }, + [ID_ADIS16135] = { + .precision = IIO_DEGREE_TO_RAD(300), + .fullscale = 24000, + }, + [ID_ADIS16136] = { + .precision = IIO_DEGREE_TO_RAD(450), + .fullscale = 24623, + }, +}; + +static int adis16136_probe(struct spi_device *spi) +{ + const struct spi_device_id *id = spi_get_device_id(spi); + struct adis16136 *adis16136; + struct iio_dev *indio_dev; + int ret; + + indio_dev = iio_device_alloc(sizeof(*adis16136)); + if (indio_dev == NULL) + return -ENOMEM; + + spi_set_drvdata(spi, indio_dev); + + adis16136 = iio_priv(indio_dev); + + adis16136->chip_info = &adis16136_chip_info[id->driver_data]; + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->channels = adis16136_channels; + indio_dev->num_channels = ARRAY_SIZE(adis16136_channels); + indio_dev->info = &adis16136_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = adis_init(&adis16136->adis, indio_dev, spi, &adis16136_data); + if (ret) + goto error_free_dev; + + ret = adis_setup_buffer_and_trigger(&adis16136->adis, indio_dev, NULL); + if (ret) + goto error_free_dev; + + ret = adis16136_initial_setup(indio_dev); + if (ret) + goto error_cleanup_buffer; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_stop_device; + + adis16136_debugfs_init(indio_dev); + + return 0; + +error_stop_device: + adis16136_stop_device(indio_dev); +error_cleanup_buffer: + adis_cleanup_buffer_and_trigger(&adis16136->adis, indio_dev); +error_free_dev: + iio_device_free(indio_dev); + return ret; +} + +static int adis16136_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct adis16136 *adis16136 = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + adis16136_stop_device(indio_dev); + + adis_cleanup_buffer_and_trigger(&adis16136->adis, indio_dev); + + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id adis16136_ids[] = { + { "adis16133", ID_ADIS16133 }, + { "adis16135", ID_ADIS16135 }, + { "adis16136", ID_ADIS16136 }, + { } +}; +MODULE_DEVICE_TABLE(spi, adis16136_ids); + +static struct spi_driver adis16136_driver = { + .driver = { + .name = "adis16136", + .owner = THIS_MODULE, + }, + .id_table = adis16136_ids, + .probe = adis16136_probe, + .remove = adis16136_remove, +}; +module_spi_driver(adis16136_driver); + +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("Analog Devices ADIS16133/ADIS16135/ADIS16136 gyroscope driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/gyro/adxrs450.c b/drivers/iio/gyro/adxrs450.c new file mode 100644 index 000000000000..5b79953f7011 --- /dev/null +++ b/drivers/iio/gyro/adxrs450.c @@ -0,0 +1,494 @@ +/* + * ADXRS450/ADXRS453 Digital Output Gyroscope Driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/delay.h> +#include <linux/mutex.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/list.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> + +#define ADXRS450_STARTUP_DELAY 50 /* ms */ + +/* The MSB for the spi commands */ +#define ADXRS450_SENSOR_DATA (0x20 << 24) +#define ADXRS450_WRITE_DATA (0x40 << 24) +#define ADXRS450_READ_DATA (0x80 << 24) + +#define ADXRS450_RATE1 0x00 /* Rate Registers */ +#define ADXRS450_TEMP1 0x02 /* Temperature Registers */ +#define ADXRS450_LOCST1 0x04 /* Low CST Memory Registers */ +#define ADXRS450_HICST1 0x06 /* High CST Memory Registers */ +#define ADXRS450_QUAD1 0x08 /* Quad Memory Registers */ +#define ADXRS450_FAULT1 0x0A /* Fault Registers */ +#define ADXRS450_PID1 0x0C /* Part ID Register 1 */ +#define ADXRS450_SNH 0x0E /* Serial Number Registers, 4 bytes */ +#define ADXRS450_SNL 0x10 +#define ADXRS450_DNC1 0x12 /* Dynamic Null Correction Registers */ +/* Check bits */ +#define ADXRS450_P 0x01 +#define ADXRS450_CHK 0x02 +#define ADXRS450_CST 0x04 +#define ADXRS450_PWR 0x08 +#define ADXRS450_POR 0x10 +#define ADXRS450_NVM 0x20 +#define ADXRS450_Q 0x40 +#define ADXRS450_PLL 0x80 +#define ADXRS450_UV 0x100 +#define ADXRS450_OV 0x200 +#define ADXRS450_AMP 0x400 +#define ADXRS450_FAIL 0x800 + +#define ADXRS450_WRERR_MASK (0x7 << 29) + +#define ADXRS450_MAX_RX 4 +#define ADXRS450_MAX_TX 4 + +#define ADXRS450_GET_ST(a) ((a >> 26) & 0x3) + +enum { + ID_ADXRS450, + ID_ADXRS453, +}; + +/** + * struct adxrs450_state - device instance specific data + * @us: actual spi_device + * @buf_lock: mutex to protect tx and rx + * @tx: transmit buffer + * @rx: receive buffer + **/ +struct adxrs450_state { + struct spi_device *us; + struct mutex buf_lock; + __be32 tx ____cacheline_aligned; + __be32 rx; + +}; + +/** + * adxrs450_spi_read_reg_16() - read 2 bytes from a register pair + * @indio_dev: device associated with child of actual iio_dev + * @reg_address: the address of the lower of the two registers, which should be + * an even address, the second register's address is reg_address + 1. + * @val: somewhere to pass back the value read + **/ +static int adxrs450_spi_read_reg_16(struct iio_dev *indio_dev, + u8 reg_address, + u16 *val) +{ + struct spi_message msg; + struct adxrs450_state *st = iio_priv(indio_dev); + u32 tx; + int ret; + struct spi_transfer xfers[] = { + { + .tx_buf = &st->tx, + .bits_per_word = 8, + .len = sizeof(st->tx), + .cs_change = 1, + }, { + .rx_buf = &st->rx, + .bits_per_word = 8, + .len = sizeof(st->rx), + }, + }; + + mutex_lock(&st->buf_lock); + tx = ADXRS450_READ_DATA | (reg_address << 17); + + if (!(hweight32(tx) & 1)) + tx |= ADXRS450_P; + + st->tx = cpu_to_be32(tx); + spi_message_init(&msg); + spi_message_add_tail(&xfers[0], &msg); + spi_message_add_tail(&xfers[1], &msg); + ret = spi_sync(st->us, &msg); + if (ret) { + dev_err(&st->us->dev, "problem while reading 16 bit register 0x%02x\n", + reg_address); + goto error_ret; + } + + *val = (be32_to_cpu(st->rx) >> 5) & 0xFFFF; + +error_ret: + mutex_unlock(&st->buf_lock); + return ret; +} + +/** + * adxrs450_spi_write_reg_16() - write 2 bytes data to a register pair + * @indio_dev: device associated with child of actual actual iio_dev + * @reg_address: the address of the lower of the two registers,which should be + * an even address, the second register's address is reg_address + 1. + * @val: value to be written. + **/ +static int adxrs450_spi_write_reg_16(struct iio_dev *indio_dev, + u8 reg_address, + u16 val) +{ + struct adxrs450_state *st = iio_priv(indio_dev); + u32 tx; + int ret; + + mutex_lock(&st->buf_lock); + tx = ADXRS450_WRITE_DATA | (reg_address << 17) | (val << 1); + + if (!(hweight32(tx) & 1)) + tx |= ADXRS450_P; + + st->tx = cpu_to_be32(tx); + ret = spi_write(st->us, &st->tx, sizeof(st->tx)); + if (ret) + dev_err(&st->us->dev, "problem while writing 16 bit register 0x%02x\n", + reg_address); + usleep_range(100, 1000); /* enforce sequential transfer delay 0.1ms */ + mutex_unlock(&st->buf_lock); + return ret; +} + +/** + * adxrs450_spi_sensor_data() - read 2 bytes sensor data + * @indio_dev: device associated with child of actual iio_dev + * @val: somewhere to pass back the value read + **/ +static int adxrs450_spi_sensor_data(struct iio_dev *indio_dev, s16 *val) +{ + struct spi_message msg; + struct adxrs450_state *st = iio_priv(indio_dev); + int ret; + struct spi_transfer xfers[] = { + { + .tx_buf = &st->tx, + .bits_per_word = 8, + .len = sizeof(st->tx), + .cs_change = 1, + }, { + .rx_buf = &st->rx, + .bits_per_word = 8, + .len = sizeof(st->rx), + }, + }; + + mutex_lock(&st->buf_lock); + st->tx = cpu_to_be32(ADXRS450_SENSOR_DATA); + + spi_message_init(&msg); + spi_message_add_tail(&xfers[0], &msg); + spi_message_add_tail(&xfers[1], &msg); + ret = spi_sync(st->us, &msg); + if (ret) { + dev_err(&st->us->dev, "Problem while reading sensor data\n"); + goto error_ret; + } + + *val = (be32_to_cpu(st->rx) >> 10) & 0xFFFF; + +error_ret: + mutex_unlock(&st->buf_lock); + return ret; +} + +/** + * adxrs450_spi_initial() - use for initializing procedure. + * @st: device instance specific data + * @val: somewhere to pass back the value read + * @chk: Whether to perform fault check + **/ +static int adxrs450_spi_initial(struct adxrs450_state *st, + u32 *val, char chk) +{ + int ret; + u32 tx; + struct spi_transfer xfers = { + .tx_buf = &st->tx, + .rx_buf = &st->rx, + .bits_per_word = 8, + .len = sizeof(st->tx), + }; + + mutex_lock(&st->buf_lock); + tx = ADXRS450_SENSOR_DATA; + if (chk) + tx |= (ADXRS450_CHK | ADXRS450_P); + st->tx = cpu_to_be32(tx); + ret = spi_sync_transfer(st->us, &xfers, 1); + if (ret) { + dev_err(&st->us->dev, "Problem while reading initializing data\n"); + goto error_ret; + } + + *val = be32_to_cpu(st->rx); + +error_ret: + mutex_unlock(&st->buf_lock); + return ret; +} + +/* Recommended Startup Sequence by spec */ +static int adxrs450_initial_setup(struct iio_dev *indio_dev) +{ + u32 t; + u16 data; + int ret; + struct adxrs450_state *st = iio_priv(indio_dev); + + msleep(ADXRS450_STARTUP_DELAY*2); + ret = adxrs450_spi_initial(st, &t, 1); + if (ret) + return ret; + if (t != 0x01) + dev_warn(&st->us->dev, "The initial power on response is not correct! Restart without reset?\n"); + + msleep(ADXRS450_STARTUP_DELAY); + ret = adxrs450_spi_initial(st, &t, 0); + if (ret) + return ret; + + msleep(ADXRS450_STARTUP_DELAY); + ret = adxrs450_spi_initial(st, &t, 0); + if (ret) + return ret; + if (((t & 0xff) | 0x01) != 0xff || ADXRS450_GET_ST(t) != 2) { + dev_err(&st->us->dev, "The second response is not correct!\n"); + return -EIO; + + } + ret = adxrs450_spi_initial(st, &t, 0); + if (ret) + return ret; + if (((t & 0xff) | 0x01) != 0xff || ADXRS450_GET_ST(t) != 2) { + dev_err(&st->us->dev, "The third response is not correct!\n"); + return -EIO; + + } + ret = adxrs450_spi_read_reg_16(indio_dev, ADXRS450_FAULT1, &data); + if (ret) + return ret; + if (data & 0x0fff) { + dev_err(&st->us->dev, "The device is not in normal status!\n"); + return -EINVAL; + } + + return 0; +} + +static int adxrs450_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + int ret; + switch (mask) { + case IIO_CHAN_INFO_CALIBBIAS: + if (val < -0x400 || val >= 0x400) + return -EINVAL; + ret = adxrs450_spi_write_reg_16(indio_dev, + ADXRS450_DNC1, val); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int adxrs450_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long mask) +{ + int ret; + s16 t; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + switch (chan->type) { + case IIO_ANGL_VEL: + ret = adxrs450_spi_sensor_data(indio_dev, &t); + if (ret) + break; + *val = t; + ret = IIO_VAL_INT; + break; + case IIO_TEMP: + ret = adxrs450_spi_read_reg_16(indio_dev, + ADXRS450_TEMP1, &t); + if (ret) + break; + *val = (t >> 6) + 225; + ret = IIO_VAL_INT; + break; + default: + ret = -EINVAL; + break; + } + break; + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ANGL_VEL: + *val = 0; + *val2 = 218166; + return IIO_VAL_INT_PLUS_NANO; + case IIO_TEMP: + *val = 200; + *val2 = 0; + return IIO_VAL_INT; + default: + return -EINVAL; + } + break; + case IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW: + ret = adxrs450_spi_read_reg_16(indio_dev, ADXRS450_QUAD1, &t); + if (ret) + break; + *val = t; + ret = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_CALIBBIAS: + ret = adxrs450_spi_read_reg_16(indio_dev, ADXRS450_DNC1, &t); + if (ret) + break; + *val = sign_extend32(t, 9); + ret = IIO_VAL_INT; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static const struct iio_chan_spec adxrs450_channels[2][2] = { + [ID_ADXRS450] = { + { + .type = IIO_ANGL_VEL, + .modified = 1, + .channel2 = IIO_MOD_Z, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT | + IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, + }, { + .type = IIO_TEMP, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, + } + }, + [ID_ADXRS453] = { + { + .type = IIO_ANGL_VEL, + .modified = 1, + .channel2 = IIO_MOD_Z, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | + IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SEPARATE_BIT, + }, { + .type = IIO_TEMP, + .indexed = 1, + .channel = 0, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, + } + }, +}; + +static const struct iio_info adxrs450_info = { + .driver_module = THIS_MODULE, + .read_raw = &adxrs450_read_raw, + .write_raw = &adxrs450_write_raw, +}; + +static int adxrs450_probe(struct spi_device *spi) +{ + int ret; + struct adxrs450_state *st; + struct iio_dev *indio_dev; + + /* setup the industrialio driver allocated elements */ + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + st = iio_priv(indio_dev); + st->us = spi; + mutex_init(&st->buf_lock); + /* This is only used for removal purposes */ + spi_set_drvdata(spi, indio_dev); + + indio_dev->dev.parent = &spi->dev; + indio_dev->info = &adxrs450_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = + adxrs450_channels[spi_get_device_id(spi)->driver_data]; + indio_dev->num_channels = ARRAY_SIZE(adxrs450_channels); + indio_dev->name = spi->dev.driver->name; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_free_dev; + + /* Get the device into a sane initial state */ + ret = adxrs450_initial_setup(indio_dev); + if (ret) + goto error_initial; + return 0; +error_initial: + iio_device_unregister(indio_dev); +error_free_dev: + iio_device_free(indio_dev); + +error_ret: + return ret; +} + +static int adxrs450_remove(struct spi_device *spi) +{ + iio_device_unregister(spi_get_drvdata(spi)); + iio_device_free(spi_get_drvdata(spi)); + + return 0; +} + +static const struct spi_device_id adxrs450_id[] = { + {"adxrs450", ID_ADXRS450}, + {"adxrs453", ID_ADXRS453}, + {} +}; +MODULE_DEVICE_TABLE(spi, adxrs450_id); + +static struct spi_driver adxrs450_driver = { + .driver = { + .name = "adxrs450", + .owner = THIS_MODULE, + }, + .probe = adxrs450_probe, + .remove = adxrs450_remove, + .id_table = adxrs450_id, +}; +module_spi_driver(adxrs450_driver); + +MODULE_AUTHOR("Cliff Cai <cliff.cai@xxxxxxxxxx>"); +MODULE_DESCRIPTION("Analog Devices ADXRS450/ADXRS453 Gyroscope SPI driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/gyro/hid-sensor-gyro-3d.c b/drivers/iio/gyro/hid-sensor-gyro-3d.c index 4c56ada51c39..fcfc83a9f861 100644 --- a/drivers/iio/gyro/hid-sensor-gyro-3d.c +++ b/drivers/iio/gyro/hid-sensor-gyro-3d.c @@ -28,7 +28,6 @@ #include <linux/iio/buffer.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> -#include "../common/hid-sensors/hid-sensor-attributes.h" #include "../common/hid-sensors/hid-sensor-trigger.h" /*Format: HID-SENSOR-usage_id_in_hex*/ @@ -44,7 +43,7 @@ enum gyro_3d_channel { struct gyro_3d_state { struct hid_sensor_hub_callbacks callbacks; - struct hid_sensor_iio_common common_attributes; + struct hid_sensor_common common_attributes; struct hid_sensor_hub_attribute_info gyro[GYRO_3D_CHANNEL_MAX]; u32 gyro_val[GYRO_3D_CHANNEL_MAX]; }; @@ -197,21 +196,8 @@ static const struct iio_info gyro_3d_info = { /* Function to push data to buffer */ static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len) { - struct iio_buffer *buffer = indio_dev->buffer; - int datum_sz; - dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n"); - if (!buffer) { - dev_err(&indio_dev->dev, "Buffer == NULL\n"); - return; - } - datum_sz = buffer->access->get_bytes_per_datum(buffer); - if (len > datum_sz) { - dev_err(&indio_dev->dev, "Datum size mismatch %d:%d\n", len, - datum_sz); - return; - } - iio_push_to_buffer(buffer, (u8 *)data); + iio_push_to_buffers(indio_dev, (u8 *)data); } /* Callback handler to send event after all samples are received and captured */ @@ -291,7 +277,7 @@ static int gyro_3d_parse_report(struct platform_device *pdev, } /* Function to initialize the processing for usage id */ -static int __devinit hid_gyro_3d_probe(struct platform_device *pdev) +static int hid_gyro_3d_probe(struct platform_device *pdev) { int ret = 0; static const char *name = "gyro_3d"; @@ -319,10 +305,10 @@ static int __devinit hid_gyro_3d_probe(struct platform_device *pdev) goto error_free_dev; } - channels = kmemdup(gyro_3d_channels, - sizeof(gyro_3d_channels), - GFP_KERNEL); + channels = kmemdup(gyro_3d_channels, sizeof(gyro_3d_channels), + GFP_KERNEL); if (!channels) { + ret = -ENOMEM; dev_err(&pdev->dev, "failed to duplicate channels\n"); goto error_free_dev; } @@ -388,7 +374,7 @@ error_ret: } /* Function to deinitialize the processing for usage id */ -static int __devinit hid_gyro_3d_remove(struct platform_device *pdev) +static int hid_gyro_3d_remove(struct platform_device *pdev) { struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; struct iio_dev *indio_dev = platform_get_drvdata(pdev); diff --git a/drivers/iio/gyro/itg3200_buffer.c b/drivers/iio/gyro/itg3200_buffer.c new file mode 100644 index 000000000000..f667d2c8c00f --- /dev/null +++ b/drivers/iio/gyro/itg3200_buffer.c @@ -0,0 +1,156 @@ +/* + * itg3200_buffer.c -- support InvenSense ITG3200 + * Digital 3-Axis Gyroscope driver + * + * Copyright (c) 2011 Christian Strobel <christian.strobel@iis.fraunhofer.de> + * Copyright (c) 2011 Manuel Stahl <manuel.stahl@iis.fraunhofer.de> + * Copyright (c) 2012 Thorsten Nowak <thorsten.nowak@iis.fraunhofer.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> + +#include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/gyro/itg3200.h> + + +static int itg3200_read_all_channels(struct i2c_client *i2c, __be16 *buf) +{ + u8 tx = 0x80 | ITG3200_REG_TEMP_OUT_H; + struct i2c_msg msg[2] = { + { + .addr = i2c->addr, + .flags = i2c->flags, + .len = 1, + .buf = &tx, + }, + { + .addr = i2c->addr, + .flags = i2c->flags | I2C_M_RD, + .len = ITG3200_SCAN_ELEMENTS * sizeof(s16), + .buf = (char *)&buf, + }, + }; + + return i2c_transfer(i2c->adapter, msg, 2); +} + +static irqreturn_t itg3200_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct itg3200 *st = iio_priv(indio_dev); + __be16 buf[ITG3200_SCAN_ELEMENTS + sizeof(s64)/sizeof(u16)]; + + int ret = itg3200_read_all_channels(st->i2c, buf); + if (ret < 0) + goto error_ret; + + if (indio_dev->scan_timestamp) + memcpy(buf + indio_dev->scan_bytes - sizeof(s64), + &pf->timestamp, sizeof(pf->timestamp)); + + iio_push_to_buffers(indio_dev, (u8 *)buf); + iio_trigger_notify_done(indio_dev->trig); + +error_ret: + return IRQ_HANDLED; +} + +int itg3200_buffer_configure(struct iio_dev *indio_dev) +{ + return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + itg3200_trigger_handler, NULL); +} + +void itg3200_buffer_unconfigure(struct iio_dev *indio_dev) +{ + iio_triggered_buffer_cleanup(indio_dev); +} + + +static int itg3200_data_rdy_trigger_set_state(struct iio_trigger *trig, + bool state) +{ + struct iio_dev *indio_dev = trig->private_data; + int ret; + u8 msc; + + ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_IRQ_CONFIG, &msc); + if (ret) + goto error_ret; + + if (state) + msc |= ITG3200_IRQ_DATA_RDY_ENABLE; + else + msc &= ~ITG3200_IRQ_DATA_RDY_ENABLE; + + ret = itg3200_write_reg_8(indio_dev, ITG3200_REG_IRQ_CONFIG, msc); + if (ret) + goto error_ret; + +error_ret: + return ret; + +} + +static const struct iio_trigger_ops itg3200_trigger_ops = { + .owner = THIS_MODULE, + .set_trigger_state = &itg3200_data_rdy_trigger_set_state, +}; + +int itg3200_probe_trigger(struct iio_dev *indio_dev) +{ + int ret; + struct itg3200 *st = iio_priv(indio_dev); + + st->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name, + indio_dev->id); + if (!st->trig) + return -ENOMEM; + + ret = request_irq(st->i2c->irq, + &iio_trigger_generic_data_rdy_poll, + IRQF_TRIGGER_RISING, + "itg3200_data_rdy", + st->trig); + if (ret) + goto error_free_trig; + + + st->trig->dev.parent = &st->i2c->dev; + st->trig->ops = &itg3200_trigger_ops; + st->trig->private_data = indio_dev; + ret = iio_trigger_register(st->trig); + if (ret) + goto error_free_irq; + + /* select default trigger */ + indio_dev->trig = st->trig; + + return 0; + +error_free_irq: + free_irq(st->i2c->irq, st->trig); +error_free_trig: + iio_trigger_free(st->trig); + return ret; +} + +void itg3200_remove_trigger(struct iio_dev *indio_dev) +{ + struct itg3200 *st = iio_priv(indio_dev); + + iio_trigger_unregister(st->trig); + free_irq(st->i2c->irq, st->trig); + iio_trigger_free(st->trig); +} diff --git a/drivers/iio/gyro/itg3200_core.c b/drivers/iio/gyro/itg3200_core.c new file mode 100644 index 000000000000..df2e6aa5d73b --- /dev/null +++ b/drivers/iio/gyro/itg3200_core.c @@ -0,0 +1,401 @@ +/* + * itg3200_core.c -- support InvenSense ITG3200 + * Digital 3-Axis Gyroscope driver + * + * Copyright (c) 2011 Christian Strobel <christian.strobel@iis.fraunhofer.de> + * Copyright (c) 2011 Manuel Stahl <manuel.stahl@iis.fraunhofer.de> + * Copyright (c) 2012 Thorsten Nowak <thorsten.nowak@iis.fraunhofer.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * TODO: + * - Support digital low pass filter + * - Support power management + */ + +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/slab.h> +#include <linux/stat.h> +#include <linux/module.h> +#include <linux/delay.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/events.h> +#include <linux/iio/buffer.h> + +#include <linux/iio/gyro/itg3200.h> + + +int itg3200_write_reg_8(struct iio_dev *indio_dev, + u8 reg_address, u8 val) +{ + struct itg3200 *st = iio_priv(indio_dev); + + return i2c_smbus_write_byte_data(st->i2c, 0x80 | reg_address, val); +} + +int itg3200_read_reg_8(struct iio_dev *indio_dev, + u8 reg_address, u8 *val) +{ + struct itg3200 *st = iio_priv(indio_dev); + int ret; + + ret = i2c_smbus_read_byte_data(st->i2c, reg_address); + if (ret < 0) + return ret; + *val = ret; + return 0; +} + +static int itg3200_read_reg_s16(struct iio_dev *indio_dev, u8 lower_reg_address, + int *val) +{ + struct itg3200 *st = iio_priv(indio_dev); + struct i2c_client *client = st->i2c; + int ret; + s16 out; + + struct i2c_msg msg[2] = { + { + .addr = client->addr, + .flags = client->flags, + .len = 1, + .buf = (char *)&lower_reg_address, + }, + { + .addr = client->addr, + .flags = client->flags | I2C_M_RD, + .len = 2, + .buf = (char *)&out, + }, + }; + + lower_reg_address |= 0x80; + ret = i2c_transfer(client->adapter, msg, 2); + be16_to_cpus(&out); + *val = out; + + return (ret == 2) ? 0 : ret; +} + +static int itg3200_read_raw(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + int *val, int *val2, long info) +{ + int ret = 0; + u8 reg; + + switch (info) { + case IIO_CHAN_INFO_RAW: + reg = (u8)chan->address; + ret = itg3200_read_reg_s16(indio_dev, reg, val); + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = 0; + if (chan->type == IIO_TEMP) + *val2 = 1000000000/280; + else + *val2 = 1214142; /* (1 / 14,375) * (PI / 180) */ + return IIO_VAL_INT_PLUS_NANO; + case IIO_CHAN_INFO_OFFSET: + /* Only the temperature channel has an offset */ + *val = 23000; + return IIO_VAL_INT; + default: + return -EINVAL; + } + + return ret; +} + +static ssize_t itg3200_read_frequency(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + int ret, sps; + u8 val; + + ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &val); + if (ret) + return ret; + + sps = (val & ITG3200_DLPF_CFG_MASK) ? 1000 : 8000; + + ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_SAMPLE_RATE_DIV, &val); + if (ret) + return ret; + + sps /= val + 1; + + return sprintf(buf, "%d\n", sps); +} + +static ssize_t itg3200_write_frequency(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + unsigned val; + int ret; + u8 t; + + ret = kstrtouint(buf, 10, &val); + if (ret) + return ret; + + mutex_lock(&indio_dev->mlock); + + ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &t); + if (ret) + goto err_ret; + + if (val == 0) { + ret = -EINVAL; + goto err_ret; + } + t = ((t & ITG3200_DLPF_CFG_MASK) ? 1000u : 8000u) / val - 1; + + ret = itg3200_write_reg_8(indio_dev, ITG3200_REG_SAMPLE_RATE_DIV, t); + +err_ret: + mutex_unlock(&indio_dev->mlock); + + return ret ? ret : len; +} + +/* + * Reset device and internal registers to the power-up-default settings + * Use the gyro clock as reference, as suggested by the datasheet + */ +static int itg3200_reset(struct iio_dev *indio_dev) +{ + struct itg3200 *st = iio_priv(indio_dev); + int ret; + + dev_dbg(&st->i2c->dev, "reset device"); + + ret = itg3200_write_reg_8(indio_dev, + ITG3200_REG_POWER_MANAGEMENT, + ITG3200_RESET); + if (ret) { + dev_err(&st->i2c->dev, "error resetting device"); + goto error_ret; + } + + /* Wait for PLL (1ms according to datasheet) */ + udelay(1500); + + ret = itg3200_write_reg_8(indio_dev, + ITG3200_REG_IRQ_CONFIG, + ITG3200_IRQ_ACTIVE_HIGH | + ITG3200_IRQ_PUSH_PULL | + ITG3200_IRQ_LATCH_50US_PULSE | + ITG3200_IRQ_LATCH_CLEAR_ANY); + + if (ret) + dev_err(&st->i2c->dev, "error init device"); + +error_ret: + return ret; +} + +/* itg3200_enable_full_scale() - Disables the digital low pass filter */ +static int itg3200_enable_full_scale(struct iio_dev *indio_dev) +{ + u8 val; + int ret; + + ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &val); + if (ret) + goto err_ret; + + val |= ITG3200_DLPF_FS_SEL_2000; + return itg3200_write_reg_8(indio_dev, ITG3200_REG_DLPF, val); + +err_ret: + return ret; +} + +static int itg3200_initial_setup(struct iio_dev *indio_dev) +{ + struct itg3200 *st = iio_priv(indio_dev); + int ret; + u8 val; + + ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_ADDRESS, &val); + if (ret) + goto err_ret; + + if (((val >> 1) & 0x3f) != 0x34) { + dev_err(&st->i2c->dev, "invalid reg value 0x%02x", val); + ret = -ENXIO; + goto err_ret; + } + + ret = itg3200_reset(indio_dev); + if (ret) + goto err_ret; + + ret = itg3200_enable_full_scale(indio_dev); +err_ret: + return ret; +} + +#define ITG3200_TEMP_INFO_MASK (IIO_CHAN_INFO_OFFSET_SHARED_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT | \ + IIO_CHAN_INFO_RAW_SEPARATE_BIT) +#define ITG3200_GYRO_INFO_MASK (IIO_CHAN_INFO_SCALE_SHARED_BIT | \ + IIO_CHAN_INFO_RAW_SEPARATE_BIT) + +#define ITG3200_ST \ + { .sign = 's', .realbits = 16, .storagebits = 16, .endianness = IIO_BE } + +#define ITG3200_GYRO_CHAN(_mod) { \ + .type = IIO_ANGL_VEL, \ + .modified = 1, \ + .channel2 = IIO_MOD_ ## _mod, \ + .info_mask = ITG3200_GYRO_INFO_MASK, \ + .address = ITG3200_REG_GYRO_ ## _mod ## OUT_H, \ + .scan_index = ITG3200_SCAN_GYRO_ ## _mod, \ + .scan_type = ITG3200_ST, \ +} + +static const struct iio_chan_spec itg3200_channels[] = { + { + .type = IIO_TEMP, + .channel2 = IIO_NO_MOD, + .info_mask = ITG3200_TEMP_INFO_MASK, + .address = ITG3200_REG_TEMP_OUT_H, + .scan_index = ITG3200_SCAN_TEMP, + .scan_type = ITG3200_ST, + }, + ITG3200_GYRO_CHAN(X), + ITG3200_GYRO_CHAN(Y), + ITG3200_GYRO_CHAN(Z), + IIO_CHAN_SOFT_TIMESTAMP(ITG3200_SCAN_ELEMENTS), +}; + +/* IIO device attributes */ +static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, itg3200_read_frequency, + itg3200_write_frequency); + +static struct attribute *itg3200_attributes[] = { + &iio_dev_attr_sampling_frequency.dev_attr.attr, + NULL +}; + +static const struct attribute_group itg3200_attribute_group = { + .attrs = itg3200_attributes, +}; + +static const struct iio_info itg3200_info = { + .attrs = &itg3200_attribute_group, + .read_raw = &itg3200_read_raw, + .driver_module = THIS_MODULE, +}; + +static const unsigned long itg3200_available_scan_masks[] = { 0xffffffff, 0x0 }; + +static int itg3200_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct itg3200 *st; + struct iio_dev *indio_dev; + + dev_dbg(&client->dev, "probe I2C dev with IRQ %i", client->irq); + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + + st = iio_priv(indio_dev); + + i2c_set_clientdata(client, indio_dev); + st->i2c = client; + + indio_dev->dev.parent = &client->dev; + indio_dev->name = client->dev.driver->name; + indio_dev->channels = itg3200_channels; + indio_dev->num_channels = ARRAY_SIZE(itg3200_channels); + indio_dev->available_scan_masks = itg3200_available_scan_masks; + indio_dev->info = &itg3200_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = itg3200_buffer_configure(indio_dev); + if (ret) + goto error_free_dev; + + if (client->irq) { + ret = itg3200_probe_trigger(indio_dev); + if (ret) + goto error_unconfigure_buffer; + } + + ret = itg3200_initial_setup(indio_dev); + if (ret) + goto error_remove_trigger; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_remove_trigger; + + return 0; + +error_remove_trigger: + if (client->irq) + itg3200_remove_trigger(indio_dev); +error_unconfigure_buffer: + itg3200_buffer_unconfigure(indio_dev); +error_free_dev: + iio_device_free(indio_dev); +error_ret: + return ret; +} + +static int itg3200_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + + iio_device_unregister(indio_dev); + + if (client->irq) + itg3200_remove_trigger(indio_dev); + + itg3200_buffer_unconfigure(indio_dev); + + iio_device_free(indio_dev); + + return 0; +} + +static const struct i2c_device_id itg3200_id[] = { + { "itg3200", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, itg3200_id); + +static struct i2c_driver itg3200_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "itg3200", + }, + .id_table = itg3200_id, + .probe = itg3200_probe, + .remove = itg3200_remove, +}; + +module_i2c_driver(itg3200_driver); + +MODULE_AUTHOR("Christian Strobel <christian.strobel@iis.fraunhofer.de>"); +MODULE_DESCRIPTION("ITG3200 Gyroscope I2C driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/gyro/st_gyro.h b/drivers/iio/gyro/st_gyro.h new file mode 100644 index 000000000000..3ad9907bb154 --- /dev/null +++ b/drivers/iio/gyro/st_gyro.h @@ -0,0 +1,45 @@ +/* + * STMicroelectronics gyroscopes driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * v. 1.0.0 + * Licensed under the GPL-2. + */ + +#ifndef ST_GYRO_H +#define ST_GYRO_H + +#include <linux/types.h> +#include <linux/iio/common/st_sensors.h> + +#define L3G4200D_GYRO_DEV_NAME "l3g4200d" +#define LSM330D_GYRO_DEV_NAME "lsm330d_gyro" +#define LSM330DL_GYRO_DEV_NAME "lsm330dl_gyro" +#define LSM330DLC_GYRO_DEV_NAME "lsm330dlc_gyro" +#define L3GD20_GYRO_DEV_NAME "l3gd20" +#define L3GD20H_GYRO_DEV_NAME "l3gd20h" +#define L3G4IS_GYRO_DEV_NAME "l3g4is_ui" +#define LSM330_GYRO_DEV_NAME "lsm330_gyro" + +int st_gyro_common_probe(struct iio_dev *indio_dev); +void st_gyro_common_remove(struct iio_dev *indio_dev); + +#ifdef CONFIG_IIO_BUFFER +int st_gyro_allocate_ring(struct iio_dev *indio_dev); +void st_gyro_deallocate_ring(struct iio_dev *indio_dev); +int st_gyro_trig_set_state(struct iio_trigger *trig, bool state); +#define ST_GYRO_TRIGGER_SET_STATE (&st_gyro_trig_set_state) +#else /* CONFIG_IIO_BUFFER */ +static inline int st_gyro_allocate_ring(struct iio_dev *indio_dev) +{ + return 0; +} +static inline void st_gyro_deallocate_ring(struct iio_dev *indio_dev) +{ +} +#define ST_GYRO_TRIGGER_SET_STATE NULL +#endif /* CONFIG_IIO_BUFFER */ + +#endif /* ST_GYRO_H */ diff --git a/drivers/iio/gyro/st_gyro_buffer.c b/drivers/iio/gyro/st_gyro_buffer.c new file mode 100644 index 000000000000..da4d122ec7dc --- /dev/null +++ b/drivers/iio/gyro/st_gyro_buffer.c @@ -0,0 +1,114 @@ +/* + * STMicroelectronics gyroscopes driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/stat.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/delay.h> +#include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#include <linux/iio/common/st_sensors.h> +#include "st_gyro.h" + +int st_gyro_trig_set_state(struct iio_trigger *trig, bool state) +{ + struct iio_dev *indio_dev = trig->private_data; + + return st_sensors_set_dataready_irq(indio_dev, state); +} + +static int st_gyro_buffer_preenable(struct iio_dev *indio_dev) +{ + int err; + + err = st_sensors_set_enable(indio_dev, true); + if (err < 0) + goto st_gyro_set_enable_error; + + err = iio_sw_buffer_preenable(indio_dev); + +st_gyro_set_enable_error: + return err; +} + +static int st_gyro_buffer_postenable(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *gdata = iio_priv(indio_dev); + + gdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); + if (gdata->buffer_data == NULL) { + err = -ENOMEM; + goto allocate_memory_error; + } + + err = st_sensors_set_axis_enable(indio_dev, + (u8)indio_dev->active_scan_mask[0]); + if (err < 0) + goto st_gyro_buffer_postenable_error; + + err = iio_triggered_buffer_postenable(indio_dev); + if (err < 0) + goto st_gyro_buffer_postenable_error; + + return err; + +st_gyro_buffer_postenable_error: + kfree(gdata->buffer_data); +allocate_memory_error: + return err; +} + +static int st_gyro_buffer_predisable(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *gdata = iio_priv(indio_dev); + + err = iio_triggered_buffer_predisable(indio_dev); + if (err < 0) + goto st_gyro_buffer_predisable_error; + + err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS); + if (err < 0) + goto st_gyro_buffer_predisable_error; + + err = st_sensors_set_enable(indio_dev, false); + +st_gyro_buffer_predisable_error: + kfree(gdata->buffer_data); + return err; +} + +static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = { + .preenable = &st_gyro_buffer_preenable, + .postenable = &st_gyro_buffer_postenable, + .predisable = &st_gyro_buffer_predisable, +}; + +int st_gyro_allocate_ring(struct iio_dev *indio_dev) +{ + return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + &st_sensors_trigger_handler, &st_gyro_buffer_setup_ops); +} + +void st_gyro_deallocate_ring(struct iio_dev *indio_dev) +{ + iio_triggered_buffer_cleanup(indio_dev); +} + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics gyroscopes buffer"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/gyro/st_gyro_core.c b/drivers/iio/gyro/st_gyro_core.c new file mode 100644 index 000000000000..fa9b24219987 --- /dev/null +++ b/drivers/iio/gyro/st_gyro_core.c @@ -0,0 +1,368 @@ +/* + * STMicroelectronics gyroscopes driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/types.h> +#include <linux/mutex.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/irq.h> +#include <linux/delay.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/trigger.h> +#include <linux/iio/buffer.h> + +#include <linux/iio/common/st_sensors.h> +#include "st_gyro.h" + +/* DEFAULT VALUE FOR SENSORS */ +#define ST_GYRO_DEFAULT_OUT_X_L_ADDR 0x28 +#define ST_GYRO_DEFAULT_OUT_Y_L_ADDR 0x2a +#define ST_GYRO_DEFAULT_OUT_Z_L_ADDR 0x2c + +/* FULLSCALE */ +#define ST_GYRO_FS_AVL_250DPS 250 +#define ST_GYRO_FS_AVL_500DPS 500 +#define ST_GYRO_FS_AVL_2000DPS 2000 + +/* CUSTOM VALUES FOR SENSOR 1 */ +#define ST_GYRO_1_WAI_EXP 0xd3 +#define ST_GYRO_1_ODR_ADDR 0x20 +#define ST_GYRO_1_ODR_MASK 0xc0 +#define ST_GYRO_1_ODR_AVL_100HZ_VAL 0x00 +#define ST_GYRO_1_ODR_AVL_200HZ_VAL 0x01 +#define ST_GYRO_1_ODR_AVL_400HZ_VAL 0x02 +#define ST_GYRO_1_ODR_AVL_800HZ_VAL 0x03 +#define ST_GYRO_1_PW_ADDR 0x20 +#define ST_GYRO_1_PW_MASK 0x08 +#define ST_GYRO_1_FS_ADDR 0x23 +#define ST_GYRO_1_FS_MASK 0x30 +#define ST_GYRO_1_FS_AVL_250_VAL 0x00 +#define ST_GYRO_1_FS_AVL_500_VAL 0x01 +#define ST_GYRO_1_FS_AVL_2000_VAL 0x02 +#define ST_GYRO_1_FS_AVL_250_GAIN IIO_DEGREE_TO_RAD(8750) +#define ST_GYRO_1_FS_AVL_500_GAIN IIO_DEGREE_TO_RAD(17500) +#define ST_GYRO_1_FS_AVL_2000_GAIN IIO_DEGREE_TO_RAD(70000) +#define ST_GYRO_1_BDU_ADDR 0x23 +#define ST_GYRO_1_BDU_MASK 0x80 +#define ST_GYRO_1_DRDY_IRQ_ADDR 0x22 +#define ST_GYRO_1_DRDY_IRQ_MASK 0x08 +#define ST_GYRO_1_MULTIREAD_BIT true + +/* CUSTOM VALUES FOR SENSOR 2 */ +#define ST_GYRO_2_WAI_EXP 0xd4 +#define ST_GYRO_2_ODR_ADDR 0x20 +#define ST_GYRO_2_ODR_MASK 0xc0 +#define ST_GYRO_2_ODR_AVL_95HZ_VAL 0x00 +#define ST_GYRO_2_ODR_AVL_190HZ_VAL 0x01 +#define ST_GYRO_2_ODR_AVL_380HZ_VAL 0x02 +#define ST_GYRO_2_ODR_AVL_760HZ_VAL 0x03 +#define ST_GYRO_2_PW_ADDR 0x20 +#define ST_GYRO_2_PW_MASK 0x08 +#define ST_GYRO_2_FS_ADDR 0x23 +#define ST_GYRO_2_FS_MASK 0x30 +#define ST_GYRO_2_FS_AVL_250_VAL 0x00 +#define ST_GYRO_2_FS_AVL_500_VAL 0x01 +#define ST_GYRO_2_FS_AVL_2000_VAL 0x02 +#define ST_GYRO_2_FS_AVL_250_GAIN IIO_DEGREE_TO_RAD(8750) +#define ST_GYRO_2_FS_AVL_500_GAIN IIO_DEGREE_TO_RAD(17500) +#define ST_GYRO_2_FS_AVL_2000_GAIN IIO_DEGREE_TO_RAD(70000) +#define ST_GYRO_2_BDU_ADDR 0x23 +#define ST_GYRO_2_BDU_MASK 0x80 +#define ST_GYRO_2_DRDY_IRQ_ADDR 0x22 +#define ST_GYRO_2_DRDY_IRQ_MASK 0x08 +#define ST_GYRO_2_MULTIREAD_BIT true + +static const struct iio_chan_spec st_gyro_16bit_channels[] = { + ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL, ST_SENSORS_SCAN_X, + IIO_MOD_X, IIO_LE, ST_SENSORS_DEFAULT_16_REALBITS, + ST_GYRO_DEFAULT_OUT_X_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL, ST_SENSORS_SCAN_Y, + IIO_MOD_Y, IIO_LE, ST_SENSORS_DEFAULT_16_REALBITS, + ST_GYRO_DEFAULT_OUT_Y_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL, ST_SENSORS_SCAN_Z, + IIO_MOD_Z, IIO_LE, ST_SENSORS_DEFAULT_16_REALBITS, + ST_GYRO_DEFAULT_OUT_Z_L_ADDR), + IIO_CHAN_SOFT_TIMESTAMP(3) +}; + +static const struct st_sensors st_gyro_sensors[] = { + { + .wai = ST_GYRO_1_WAI_EXP, + .sensors_supported = { + [0] = L3G4200D_GYRO_DEV_NAME, + [1] = LSM330DL_GYRO_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_gyro_16bit_channels, + .odr = { + .addr = ST_GYRO_1_ODR_ADDR, + .mask = ST_GYRO_1_ODR_MASK, + .odr_avl = { + { 100, ST_GYRO_1_ODR_AVL_100HZ_VAL, }, + { 200, ST_GYRO_1_ODR_AVL_200HZ_VAL, }, + { 400, ST_GYRO_1_ODR_AVL_400HZ_VAL, }, + { 800, ST_GYRO_1_ODR_AVL_800HZ_VAL, }, + }, + }, + .pw = { + .addr = ST_GYRO_1_PW_ADDR, + .mask = ST_GYRO_1_PW_MASK, + .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, + .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, + }, + .enable_axis = { + .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, + .mask = ST_SENSORS_DEFAULT_AXIS_MASK, + }, + .fs = { + .addr = ST_GYRO_1_FS_ADDR, + .mask = ST_GYRO_1_FS_MASK, + .fs_avl = { + [0] = { + .num = ST_GYRO_FS_AVL_250DPS, + .value = ST_GYRO_1_FS_AVL_250_VAL, + .gain = ST_GYRO_1_FS_AVL_250_GAIN, + }, + [1] = { + .num = ST_GYRO_FS_AVL_500DPS, + .value = ST_GYRO_1_FS_AVL_500_VAL, + .gain = ST_GYRO_1_FS_AVL_500_GAIN, + }, + [2] = { + .num = ST_GYRO_FS_AVL_2000DPS, + .value = ST_GYRO_1_FS_AVL_2000_VAL, + .gain = ST_GYRO_1_FS_AVL_2000_GAIN, + }, + }, + }, + .bdu = { + .addr = ST_GYRO_1_BDU_ADDR, + .mask = ST_GYRO_1_BDU_MASK, + }, + .drdy_irq = { + .addr = ST_GYRO_1_DRDY_IRQ_ADDR, + .mask = ST_GYRO_1_DRDY_IRQ_MASK, + }, + .multi_read_bit = ST_GYRO_1_MULTIREAD_BIT, + .bootime = 2, + }, + { + .wai = ST_GYRO_2_WAI_EXP, + .sensors_supported = { + [0] = L3GD20_GYRO_DEV_NAME, + [1] = L3GD20H_GYRO_DEV_NAME, + [2] = LSM330D_GYRO_DEV_NAME, + [3] = LSM330DLC_GYRO_DEV_NAME, + [4] = L3G4IS_GYRO_DEV_NAME, + [5] = LSM330_GYRO_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_gyro_16bit_channels, + .odr = { + .addr = ST_GYRO_2_ODR_ADDR, + .mask = ST_GYRO_2_ODR_MASK, + .odr_avl = { + { 95, ST_GYRO_2_ODR_AVL_95HZ_VAL, }, + { 190, ST_GYRO_2_ODR_AVL_190HZ_VAL, }, + { 380, ST_GYRO_2_ODR_AVL_380HZ_VAL, }, + { 760, ST_GYRO_2_ODR_AVL_760HZ_VAL, }, + }, + }, + .pw = { + .addr = ST_GYRO_2_PW_ADDR, + .mask = ST_GYRO_2_PW_MASK, + .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, + .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, + }, + .enable_axis = { + .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, + .mask = ST_SENSORS_DEFAULT_AXIS_MASK, + }, + .fs = { + .addr = ST_GYRO_2_FS_ADDR, + .mask = ST_GYRO_2_FS_MASK, + .fs_avl = { + [0] = { + .num = ST_GYRO_FS_AVL_250DPS, + .value = ST_GYRO_2_FS_AVL_250_VAL, + .gain = ST_GYRO_2_FS_AVL_250_GAIN, + }, + [1] = { + .num = ST_GYRO_FS_AVL_500DPS, + .value = ST_GYRO_2_FS_AVL_500_VAL, + .gain = ST_GYRO_2_FS_AVL_500_GAIN, + }, + [2] = { + .num = ST_GYRO_FS_AVL_2000DPS, + .value = ST_GYRO_2_FS_AVL_2000_VAL, + .gain = ST_GYRO_2_FS_AVL_2000_GAIN, + }, + }, + }, + .bdu = { + .addr = ST_GYRO_2_BDU_ADDR, + .mask = ST_GYRO_2_BDU_MASK, + }, + .drdy_irq = { + .addr = ST_GYRO_2_DRDY_IRQ_ADDR, + .mask = ST_GYRO_2_DRDY_IRQ_MASK, + }, + .multi_read_bit = ST_GYRO_2_MULTIREAD_BIT, + .bootime = 2, + }, +}; + +static int st_gyro_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *ch, int *val, + int *val2, long mask) +{ + int err; + struct st_sensor_data *gdata = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + err = st_sensors_read_info_raw(indio_dev, ch, val); + if (err < 0) + goto read_error; + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = 0; + *val2 = gdata->current_fullscale->gain; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + +read_error: + return err; +} + +static int st_gyro_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long mask) +{ + int err; + + switch (mask) { + case IIO_CHAN_INFO_SCALE: + err = st_sensors_set_fullscale_by_gain(indio_dev, val2); + break; + default: + err = -EINVAL; + } + + return err; +} + +static ST_SENSOR_DEV_ATTR_SAMP_FREQ(); +static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL(); +static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_anglvel_scale_available); + +static struct attribute *st_gyro_attributes[] = { + &iio_dev_attr_sampling_frequency_available.dev_attr.attr, + &iio_dev_attr_in_anglvel_scale_available.dev_attr.attr, + &iio_dev_attr_sampling_frequency.dev_attr.attr, + NULL, +}; + +static const struct attribute_group st_gyro_attribute_group = { + .attrs = st_gyro_attributes, +}; + +static const struct iio_info gyro_info = { + .driver_module = THIS_MODULE, + .attrs = &st_gyro_attribute_group, + .read_raw = &st_gyro_read_raw, + .write_raw = &st_gyro_write_raw, +}; + +#ifdef CONFIG_IIO_TRIGGER +static const struct iio_trigger_ops st_gyro_trigger_ops = { + .owner = THIS_MODULE, + .set_trigger_state = ST_GYRO_TRIGGER_SET_STATE, +}; +#define ST_GYRO_TRIGGER_OPS (&st_gyro_trigger_ops) +#else +#define ST_GYRO_TRIGGER_OPS NULL +#endif + +int st_gyro_common_probe(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *gdata = iio_priv(indio_dev); + + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &gyro_info; + + err = st_sensors_check_device_support(indio_dev, + ARRAY_SIZE(st_gyro_sensors), st_gyro_sensors); + if (err < 0) + goto st_gyro_common_probe_error; + + gdata->multiread_bit = gdata->sensor->multi_read_bit; + indio_dev->channels = gdata->sensor->ch; + indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; + + gdata->current_fullscale = (struct st_sensor_fullscale_avl *) + &gdata->sensor->fs.fs_avl[0]; + gdata->odr = gdata->sensor->odr.odr_avl[0].hz; + + err = st_sensors_init_sensor(indio_dev); + if (err < 0) + goto st_gyro_common_probe_error; + + if (gdata->get_irq_data_ready(indio_dev) > 0) { + err = st_gyro_allocate_ring(indio_dev); + if (err < 0) + goto st_gyro_common_probe_error; + + err = st_sensors_allocate_trigger(indio_dev, + ST_GYRO_TRIGGER_OPS); + if (err < 0) + goto st_gyro_probe_trigger_error; + } + + err = iio_device_register(indio_dev); + if (err) + goto st_gyro_device_register_error; + + return err; + +st_gyro_device_register_error: + if (gdata->get_irq_data_ready(indio_dev) > 0) + st_sensors_deallocate_trigger(indio_dev); +st_gyro_probe_trigger_error: + if (gdata->get_irq_data_ready(indio_dev) > 0) + st_gyro_deallocate_ring(indio_dev); +st_gyro_common_probe_error: + return err; +} +EXPORT_SYMBOL(st_gyro_common_probe); + +void st_gyro_common_remove(struct iio_dev *indio_dev) +{ + struct st_sensor_data *gdata = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + if (gdata->get_irq_data_ready(indio_dev) > 0) { + st_sensors_deallocate_trigger(indio_dev); + st_gyro_deallocate_ring(indio_dev); + } + iio_device_free(indio_dev); +} +EXPORT_SYMBOL(st_gyro_common_remove); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics gyroscopes driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/gyro/st_gyro_i2c.c b/drivers/iio/gyro/st_gyro_i2c.c new file mode 100644 index 000000000000..8a310500573d --- /dev/null +++ b/drivers/iio/gyro/st_gyro_i2c.c @@ -0,0 +1,84 @@ +/* + * STMicroelectronics gyroscopes driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/iio/iio.h> + +#include <linux/iio/common/st_sensors.h> +#include <linux/iio/common/st_sensors_i2c.h> +#include "st_gyro.h" + +static int st_gyro_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct iio_dev *indio_dev; + struct st_sensor_data *gdata; + int err; + + indio_dev = iio_device_alloc(sizeof(*gdata)); + if (indio_dev == NULL) { + err = -ENOMEM; + goto iio_device_alloc_error; + } + + gdata = iio_priv(indio_dev); + gdata->dev = &client->dev; + + st_sensors_i2c_configure(indio_dev, client, gdata); + + err = st_gyro_common_probe(indio_dev); + if (err < 0) + goto st_gyro_common_probe_error; + + return 0; + +st_gyro_common_probe_error: + iio_device_free(indio_dev); +iio_device_alloc_error: + return err; +} + +static int st_gyro_i2c_remove(struct i2c_client *client) +{ + st_gyro_common_remove(i2c_get_clientdata(client)); + + return 0; +} + +static const struct i2c_device_id st_gyro_id_table[] = { + { L3G4200D_GYRO_DEV_NAME }, + { LSM330D_GYRO_DEV_NAME }, + { LSM330DL_GYRO_DEV_NAME }, + { LSM330DLC_GYRO_DEV_NAME }, + { L3GD20_GYRO_DEV_NAME }, + { L3GD20H_GYRO_DEV_NAME }, + { L3G4IS_GYRO_DEV_NAME }, + { LSM330_GYRO_DEV_NAME }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, st_gyro_id_table); + +static struct i2c_driver st_gyro_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "st-gyro-i2c", + }, + .probe = st_gyro_i2c_probe, + .remove = st_gyro_i2c_remove, + .id_table = st_gyro_id_table, +}; +module_i2c_driver(st_gyro_driver); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics gyroscopes i2c driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/gyro/st_gyro_spi.c b/drivers/iio/gyro/st_gyro_spi.c new file mode 100644 index 000000000000..f3540390eb22 --- /dev/null +++ b/drivers/iio/gyro/st_gyro_spi.c @@ -0,0 +1,83 @@ +/* + * STMicroelectronics gyroscopes driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/spi/spi.h> +#include <linux/iio/iio.h> + +#include <linux/iio/common/st_sensors.h> +#include <linux/iio/common/st_sensors_spi.h> +#include "st_gyro.h" + +static int st_gyro_spi_probe(struct spi_device *spi) +{ + struct iio_dev *indio_dev; + struct st_sensor_data *gdata; + int err; + + indio_dev = iio_device_alloc(sizeof(*gdata)); + if (indio_dev == NULL) { + err = -ENOMEM; + goto iio_device_alloc_error; + } + + gdata = iio_priv(indio_dev); + gdata->dev = &spi->dev; + + st_sensors_spi_configure(indio_dev, spi, gdata); + + err = st_gyro_common_probe(indio_dev); + if (err < 0) + goto st_gyro_common_probe_error; + + return 0; + +st_gyro_common_probe_error: + iio_device_free(indio_dev); +iio_device_alloc_error: + return err; +} + +static int st_gyro_spi_remove(struct spi_device *spi) +{ + st_gyro_common_remove(spi_get_drvdata(spi)); + + return 0; +} + +static const struct spi_device_id st_gyro_id_table[] = { + { L3G4200D_GYRO_DEV_NAME }, + { LSM330D_GYRO_DEV_NAME }, + { LSM330DL_GYRO_DEV_NAME }, + { LSM330DLC_GYRO_DEV_NAME }, + { L3GD20_GYRO_DEV_NAME }, + { L3GD20H_GYRO_DEV_NAME }, + { L3G4IS_GYRO_DEV_NAME }, + { LSM330_GYRO_DEV_NAME }, + {}, +}; +MODULE_DEVICE_TABLE(spi, st_gyro_id_table); + +static struct spi_driver st_gyro_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "st-gyro-spi", + }, + .probe = st_gyro_spi_probe, + .remove = st_gyro_spi_remove, + .id_table = st_gyro_id_table, +}; +module_spi_driver(st_gyro_driver); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics gyroscopes spi driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/imu/Kconfig b/drivers/iio/imu/Kconfig new file mode 100644 index 000000000000..4f40a10cb74f --- /dev/null +++ b/drivers/iio/imu/Kconfig @@ -0,0 +1,40 @@ +# +# IIO imu drivers configuration +# +menu "Inertial measurement units" + +config ADIS16400 + tristate "Analog Devices ADIS16400 and similar IMU SPI driver" + depends on SPI + select IIO_ADIS_LIB + select IIO_ADIS_LIB_BUFFER if IIO_BUFFER + help + Say yes here to build support for Analog Devices adis16300, adis16344, + adis16350, adis16354, adis16355, adis16360, adis16362, adis16364, + adis16365, adis16400 and adis16405 triaxial inertial sensors + (adis16400 series also have magnetometers). + +config ADIS16480 + tristate "Analog Devices ADIS16480 and similar IMU driver" + depends on SPI + select IIO_ADIS_LIB + select IIO_ADIS_LIB_BUFFER if IIO_BUFFER + help + Say yes here to build support for Analog Devices ADIS16375, ADIS16480, + ADIS16485, ADIS16488 inertial sensors. + +endmenu + +config IIO_ADIS_LIB + tristate + help + A set of IO helper functions for the Analog Devices ADIS* device family. + +config IIO_ADIS_LIB_BUFFER + bool + select IIO_TRIGGERED_BUFFER + help + A set of buffer helper functions for the Analog Devices ADIS* device + family. + +source "drivers/iio/imu/inv_mpu6050/Kconfig" diff --git a/drivers/iio/imu/Makefile b/drivers/iio/imu/Makefile new file mode 100644 index 000000000000..f2f56ceaed26 --- /dev/null +++ b/drivers/iio/imu/Makefile @@ -0,0 +1,15 @@ +# +# Makefile for Inertial Measurement Units +# + +adis16400-y := adis16400_core.o +adis16400-$(CONFIG_IIO_BUFFER) += adis16400_buffer.o +obj-$(CONFIG_ADIS16400) += adis16400.o +obj-$(CONFIG_ADIS16480) += adis16480.o + +adis_lib-y += adis.o +adis_lib-$(CONFIG_IIO_ADIS_LIB_BUFFER) += adis_trigger.o +adis_lib-$(CONFIG_IIO_ADIS_LIB_BUFFER) += adis_buffer.o +obj-$(CONFIG_IIO_ADIS_LIB) += adis_lib.o + +obj-y += inv_mpu6050/ diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c new file mode 100644 index 000000000000..911255d41c1a --- /dev/null +++ b/drivers/iio/imu/adis.c @@ -0,0 +1,440 @@ +/* + * Common library for ADIS16XXX devices + * + * Copyright 2012 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/delay.h> +#include <linux/mutex.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/module.h> +#include <asm/unaligned.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/imu/adis.h> + +#define ADIS_MSC_CTRL_DATA_RDY_EN BIT(2) +#define ADIS_MSC_CTRL_DATA_RDY_POL_HIGH BIT(1) +#define ADIS_MSC_CTRL_DATA_RDY_DIO2 BIT(0) +#define ADIS_GLOB_CMD_SW_RESET BIT(7) + +int adis_write_reg(struct adis *adis, unsigned int reg, + unsigned int value, unsigned int size) +{ + unsigned int page = reg / ADIS_PAGE_SIZE; + int ret, i; + struct spi_message msg; + struct spi_transfer xfers[] = { + { + .tx_buf = adis->tx, + .bits_per_word = 8, + .len = 2, + .cs_change = 1, + .delay_usecs = adis->data->write_delay, + }, { + .tx_buf = adis->tx + 2, + .bits_per_word = 8, + .len = 2, + .cs_change = 1, + .delay_usecs = adis->data->write_delay, + }, { + .tx_buf = adis->tx + 4, + .bits_per_word = 8, + .len = 2, + .cs_change = 1, + .delay_usecs = adis->data->write_delay, + }, { + .tx_buf = adis->tx + 6, + .bits_per_word = 8, + .len = 2, + .delay_usecs = adis->data->write_delay, + }, { + .tx_buf = adis->tx + 8, + .bits_per_word = 8, + .len = 2, + .delay_usecs = adis->data->write_delay, + }, + }; + + mutex_lock(&adis->txrx_lock); + + spi_message_init(&msg); + + if (adis->current_page != page) { + adis->tx[0] = ADIS_WRITE_REG(ADIS_REG_PAGE_ID); + adis->tx[1] = page; + spi_message_add_tail(&xfers[0], &msg); + } + + switch (size) { + case 4: + adis->tx[8] = ADIS_WRITE_REG(reg + 3); + adis->tx[9] = (value >> 24) & 0xff; + adis->tx[6] = ADIS_WRITE_REG(reg + 2); + adis->tx[7] = (value >> 16) & 0xff; + case 2: + adis->tx[4] = ADIS_WRITE_REG(reg + 1); + adis->tx[5] = (value >> 8) & 0xff; + case 1: + adis->tx[2] = ADIS_WRITE_REG(reg); + adis->tx[3] = value & 0xff; + break; + default: + ret = -EINVAL; + goto out_unlock; + } + + xfers[size].cs_change = 0; + + for (i = 1; i <= size; i++) + spi_message_add_tail(&xfers[i], &msg); + + ret = spi_sync(adis->spi, &msg); + if (ret) { + dev_err(&adis->spi->dev, "Failed to write register 0x%02X: %d\n", + reg, ret); + } else { + adis->current_page = page; + } + +out_unlock: + mutex_unlock(&adis->txrx_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(adis_write_reg); + +/** + * adis_read_reg() - read 2 bytes from a 16-bit register + * @adis: The adis device + * @reg: The address of the lower of the two registers + * @val: The value read back from the device + */ +int adis_read_reg(struct adis *adis, unsigned int reg, + unsigned int *val, unsigned int size) +{ + unsigned int page = reg / ADIS_PAGE_SIZE; + struct spi_message msg; + int ret; + struct spi_transfer xfers[] = { + { + .tx_buf = adis->tx, + .bits_per_word = 8, + .len = 2, + .cs_change = 1, + .delay_usecs = adis->data->write_delay, + }, { + .tx_buf = adis->tx + 2, + .bits_per_word = 8, + .len = 2, + .cs_change = 1, + .delay_usecs = adis->data->read_delay, + }, { + .tx_buf = adis->tx + 4, + .rx_buf = adis->rx, + .bits_per_word = 8, + .len = 2, + .cs_change = 1, + .delay_usecs = adis->data->read_delay, + }, { + .rx_buf = adis->rx + 2, + .bits_per_word = 8, + .len = 2, + .delay_usecs = adis->data->read_delay, + }, + }; + + mutex_lock(&adis->txrx_lock); + spi_message_init(&msg); + + if (adis->current_page != page) { + adis->tx[0] = ADIS_WRITE_REG(ADIS_REG_PAGE_ID); + adis->tx[1] = page; + spi_message_add_tail(&xfers[0], &msg); + } + + switch (size) { + case 4: + adis->tx[2] = ADIS_READ_REG(reg + 2); + adis->tx[3] = 0; + spi_message_add_tail(&xfers[1], &msg); + case 2: + adis->tx[4] = ADIS_READ_REG(reg); + adis->tx[5] = 0; + spi_message_add_tail(&xfers[2], &msg); + spi_message_add_tail(&xfers[3], &msg); + break; + default: + ret = -EINVAL; + goto out_unlock; + } + + ret = spi_sync(adis->spi, &msg); + if (ret) { + dev_err(&adis->spi->dev, "Failed to read register 0x%02X: %d\n", + reg, ret); + goto out_unlock; + } else { + adis->current_page = page; + } + + switch (size) { + case 4: + *val = get_unaligned_be32(adis->rx); + break; + case 2: + *val = get_unaligned_be16(adis->rx + 2); + break; + } + +out_unlock: + mutex_unlock(&adis->txrx_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(adis_read_reg); + +#ifdef CONFIG_DEBUG_FS + +int adis_debugfs_reg_access(struct iio_dev *indio_dev, + unsigned int reg, unsigned int writeval, unsigned int *readval) +{ + struct adis *adis = iio_device_get_drvdata(indio_dev); + + if (readval) { + uint16_t val16; + int ret; + + ret = adis_read_reg_16(adis, reg, &val16); + *readval = val16; + + return ret; + } else { + return adis_write_reg_16(adis, reg, writeval); + } +} +EXPORT_SYMBOL(adis_debugfs_reg_access); + +#endif + +/** + * adis_enable_irq() - Enable or disable data ready IRQ + * @adis: The adis device + * @enable: Whether to enable the IRQ + * + * Returns 0 on success, negative error code otherwise + */ +int adis_enable_irq(struct adis *adis, bool enable) +{ + int ret = 0; + uint16_t msc; + + if (adis->data->enable_irq) + return adis->data->enable_irq(adis, enable); + + ret = adis_read_reg_16(adis, adis->data->msc_ctrl_reg, &msc); + if (ret) + goto error_ret; + + msc |= ADIS_MSC_CTRL_DATA_RDY_POL_HIGH; + msc &= ~ADIS_MSC_CTRL_DATA_RDY_DIO2; + if (enable) + msc |= ADIS_MSC_CTRL_DATA_RDY_EN; + else + msc &= ~ADIS_MSC_CTRL_DATA_RDY_EN; + + ret = adis_write_reg_16(adis, adis->data->msc_ctrl_reg, msc); + +error_ret: + return ret; +} +EXPORT_SYMBOL(adis_enable_irq); + +/** + * adis_check_status() - Check the device for error conditions + * @adis: The adis device + * + * Returns 0 on success, a negative error code otherwise + */ +int adis_check_status(struct adis *adis) +{ + uint16_t status; + int ret; + int i; + + ret = adis_read_reg_16(adis, adis->data->diag_stat_reg, &status); + if (ret < 0) + return ret; + + status &= adis->data->status_error_mask; + + if (status == 0) + return 0; + + for (i = 0; i < 16; ++i) { + if (status & BIT(i)) { + dev_err(&adis->spi->dev, "%s.\n", + adis->data->status_error_msgs[i]); + } + } + + return -EIO; +} +EXPORT_SYMBOL_GPL(adis_check_status); + +/** + * adis_reset() - Reset the device + * @adis: The adis device + * + * Returns 0 on success, a negative error code otherwise + */ +int adis_reset(struct adis *adis) +{ + int ret; + + ret = adis_write_reg_8(adis, adis->data->glob_cmd_reg, + ADIS_GLOB_CMD_SW_RESET); + if (ret) + dev_err(&adis->spi->dev, "Failed to reset device: %d\n", ret); + + return ret; +} +EXPORT_SYMBOL_GPL(adis_reset); + +static int adis_self_test(struct adis *adis) +{ + int ret; + + ret = adis_write_reg_16(adis, adis->data->msc_ctrl_reg, + adis->data->self_test_mask); + if (ret) { + dev_err(&adis->spi->dev, "Failed to initiate self test: %d\n", + ret); + return ret; + } + + msleep(adis->data->startup_delay); + + return adis_check_status(adis); +} + +/** + * adis_inital_startup() - Performs device self-test + * @adis: The adis device + * + * Returns 0 if the device is operational, a negative error code otherwise. + * + * This function should be called early on in the device initialization sequence + * to ensure that the device is in a sane and known state and that it is usable. + */ +int adis_initial_startup(struct adis *adis) +{ + int ret; + + ret = adis_self_test(adis); + if (ret) { + dev_err(&adis->spi->dev, "Self-test failed, trying reset.\n"); + adis_reset(adis); + msleep(adis->data->startup_delay); + ret = adis_self_test(adis); + if (ret) { + dev_err(&adis->spi->dev, "Second self-test failed, giving up.\n"); + return ret; + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(adis_initial_startup); + +/** + * adis_single_conversion() - Performs a single sample conversion + * @indio_dev: The IIO device + * @chan: The IIO channel + * @error_mask: Mask for the error bit + * @val: Result of the conversion + * + * Returns IIO_VAL_INT on success, a negative error code otherwise. + * + * The function performs a single conversion on a given channel and post + * processes the value accordingly to the channel spec. If a error_mask is given + * the function will check if the mask is set in the returned raw value. If it + * is set the function will perform a self-check. If the device does not report + * a error bit in the channels raw value set error_mask to 0. + */ +int adis_single_conversion(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, unsigned int error_mask, int *val) +{ + struct adis *adis = iio_device_get_drvdata(indio_dev); + unsigned int uval; + int ret; + + mutex_lock(&indio_dev->mlock); + + ret = adis_read_reg(adis, chan->address, &uval, + chan->scan_type.storagebits / 8); + if (ret) + goto err_unlock; + + if (uval & error_mask) { + ret = adis_check_status(adis); + if (ret) + goto err_unlock; + } + + if (chan->scan_type.sign == 's') + *val = sign_extend32(uval, chan->scan_type.realbits - 1); + else + *val = uval & ((1 << chan->scan_type.realbits) - 1); + + ret = IIO_VAL_INT; +err_unlock: + mutex_unlock(&indio_dev->mlock); + return ret; +} +EXPORT_SYMBOL_GPL(adis_single_conversion); + +/** + * adis_init() - Initialize adis device structure + * @adis: The adis device + * @indio_dev: The iio device + * @spi: The spi device + * @data: Chip specific data + * + * Returns 0 on success, a negative error code otherwise. + * + * This function must be called, before any other adis helper function may be + * called. + */ +int adis_init(struct adis *adis, struct iio_dev *indio_dev, + struct spi_device *spi, const struct adis_data *data) +{ + mutex_init(&adis->txrx_lock); + adis->spi = spi; + adis->data = data; + iio_device_set_drvdata(indio_dev, adis); + + if (data->has_paging) { + /* Need to set the page before first read/write */ + adis->current_page = -1; + } else { + /* Page will always be 0 */ + adis->current_page = 0; + } + + return adis_enable_irq(adis, false); +} +EXPORT_SYMBOL_GPL(adis_init); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("Common library code for ADIS16XXX devices"); diff --git a/drivers/iio/imu/adis16400.h b/drivers/iio/imu/adis16400.h new file mode 100644 index 000000000000..2f8f9d632386 --- /dev/null +++ b/drivers/iio/imu/adis16400.h @@ -0,0 +1,212 @@ +/* + * adis16400.h support Analog Devices ADIS16400 + * 3d 18g accelerometers, + * 3d gyroscopes, + * 3d 2.5gauss magnetometers via SPI + * + * Copyright (c) 2009 Manuel Stahl <manuel.stahl@iis.fraunhofer.de> + * Copyright (c) 2007 Jonathan Cameron <jic23@kernel.org> + * + * Loosely based upon lis3l02dq.h + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef SPI_ADIS16400_H_ +#define SPI_ADIS16400_H_ + +#include <linux/iio/imu/adis.h> + +#define ADIS16400_STARTUP_DELAY 290 /* ms */ +#define ADIS16400_MTEST_DELAY 90 /* ms */ + +#define ADIS16400_FLASH_CNT 0x00 /* Flash memory write count */ +#define ADIS16400_SUPPLY_OUT 0x02 /* Power supply measurement */ +#define ADIS16400_XGYRO_OUT 0x04 /* X-axis gyroscope output */ +#define ADIS16400_YGYRO_OUT 0x06 /* Y-axis gyroscope output */ +#define ADIS16400_ZGYRO_OUT 0x08 /* Z-axis gyroscope output */ +#define ADIS16400_XACCL_OUT 0x0A /* X-axis accelerometer output */ +#define ADIS16400_YACCL_OUT 0x0C /* Y-axis accelerometer output */ +#define ADIS16400_ZACCL_OUT 0x0E /* Z-axis accelerometer output */ +#define ADIS16400_XMAGN_OUT 0x10 /* X-axis magnetometer measurement */ +#define ADIS16400_YMAGN_OUT 0x12 /* Y-axis magnetometer measurement */ +#define ADIS16400_ZMAGN_OUT 0x14 /* Z-axis magnetometer measurement */ +#define ADIS16400_TEMP_OUT 0x16 /* Temperature output */ +#define ADIS16400_AUX_ADC 0x18 /* Auxiliary ADC measurement */ + +#define ADIS16350_XTEMP_OUT 0x10 /* X-axis gyroscope temperature measurement */ +#define ADIS16350_YTEMP_OUT 0x12 /* Y-axis gyroscope temperature measurement */ +#define ADIS16350_ZTEMP_OUT 0x14 /* Z-axis gyroscope temperature measurement */ + +#define ADIS16300_PITCH_OUT 0x12 /* X axis inclinometer output measurement */ +#define ADIS16300_ROLL_OUT 0x14 /* Y axis inclinometer output measurement */ +#define ADIS16300_AUX_ADC 0x16 /* Auxiliary ADC measurement */ + +#define ADIS16448_BARO_OUT 0x16 /* Barometric pressure output */ +#define ADIS16448_TEMP_OUT 0x18 /* Temperature output */ + +/* Calibration parameters */ +#define ADIS16400_XGYRO_OFF 0x1A /* X-axis gyroscope bias offset factor */ +#define ADIS16400_YGYRO_OFF 0x1C /* Y-axis gyroscope bias offset factor */ +#define ADIS16400_ZGYRO_OFF 0x1E /* Z-axis gyroscope bias offset factor */ +#define ADIS16400_XACCL_OFF 0x20 /* X-axis acceleration bias offset factor */ +#define ADIS16400_YACCL_OFF 0x22 /* Y-axis acceleration bias offset factor */ +#define ADIS16400_ZACCL_OFF 0x24 /* Z-axis acceleration bias offset factor */ +#define ADIS16400_XMAGN_HIF 0x26 /* X-axis magnetometer, hard-iron factor */ +#define ADIS16400_YMAGN_HIF 0x28 /* Y-axis magnetometer, hard-iron factor */ +#define ADIS16400_ZMAGN_HIF 0x2A /* Z-axis magnetometer, hard-iron factor */ +#define ADIS16400_XMAGN_SIF 0x2C /* X-axis magnetometer, soft-iron factor */ +#define ADIS16400_YMAGN_SIF 0x2E /* Y-axis magnetometer, soft-iron factor */ +#define ADIS16400_ZMAGN_SIF 0x30 /* Z-axis magnetometer, soft-iron factor */ + +#define ADIS16400_GPIO_CTRL 0x32 /* Auxiliary digital input/output control */ +#define ADIS16400_MSC_CTRL 0x34 /* Miscellaneous control */ +#define ADIS16400_SMPL_PRD 0x36 /* Internal sample period (rate) control */ +#define ADIS16400_SENS_AVG 0x38 /* Dynamic range and digital filter control */ +#define ADIS16400_SLP_CNT 0x3A /* Sleep mode control */ +#define ADIS16400_DIAG_STAT 0x3C /* System status */ + +/* Alarm functions */ +#define ADIS16400_GLOB_CMD 0x3E /* System command */ +#define ADIS16400_ALM_MAG1 0x40 /* Alarm 1 amplitude threshold */ +#define ADIS16400_ALM_MAG2 0x42 /* Alarm 2 amplitude threshold */ +#define ADIS16400_ALM_SMPL1 0x44 /* Alarm 1 sample size */ +#define ADIS16400_ALM_SMPL2 0x46 /* Alarm 2 sample size */ +#define ADIS16400_ALM_CTRL 0x48 /* Alarm control */ +#define ADIS16400_AUX_DAC 0x4A /* Auxiliary DAC data */ + +#define ADIS16334_LOT_ID1 0x52 /* Lot identification code 1 */ +#define ADIS16334_LOT_ID2 0x54 /* Lot identification code 2 */ +#define ADIS16400_PRODUCT_ID 0x56 /* Product identifier */ +#define ADIS16334_SERIAL_NUMBER 0x58 /* Serial number, lot specific */ + +#define ADIS16400_ERROR_ACTIVE (1<<14) +#define ADIS16400_NEW_DATA (1<<14) + +/* MSC_CTRL */ +#define ADIS16400_MSC_CTRL_MEM_TEST (1<<11) +#define ADIS16400_MSC_CTRL_INT_SELF_TEST (1<<10) +#define ADIS16400_MSC_CTRL_NEG_SELF_TEST (1<<9) +#define ADIS16400_MSC_CTRL_POS_SELF_TEST (1<<8) +#define ADIS16400_MSC_CTRL_GYRO_BIAS (1<<7) +#define ADIS16400_MSC_CTRL_ACCL_ALIGN (1<<6) +#define ADIS16400_MSC_CTRL_DATA_RDY_EN (1<<2) +#define ADIS16400_MSC_CTRL_DATA_RDY_POL_HIGH (1<<1) +#define ADIS16400_MSC_CTRL_DATA_RDY_DIO2 (1<<0) + +/* SMPL_PRD */ +#define ADIS16400_SMPL_PRD_TIME_BASE (1<<7) +#define ADIS16400_SMPL_PRD_DIV_MASK 0x7F + +/* DIAG_STAT */ +#define ADIS16400_DIAG_STAT_ZACCL_FAIL 15 +#define ADIS16400_DIAG_STAT_YACCL_FAIL 14 +#define ADIS16400_DIAG_STAT_XACCL_FAIL 13 +#define ADIS16400_DIAG_STAT_XGYRO_FAIL 12 +#define ADIS16400_DIAG_STAT_YGYRO_FAIL 11 +#define ADIS16400_DIAG_STAT_ZGYRO_FAIL 10 +#define ADIS16400_DIAG_STAT_ALARM2 9 +#define ADIS16400_DIAG_STAT_ALARM1 8 +#define ADIS16400_DIAG_STAT_FLASH_CHK 6 +#define ADIS16400_DIAG_STAT_SELF_TEST 5 +#define ADIS16400_DIAG_STAT_OVERFLOW 4 +#define ADIS16400_DIAG_STAT_SPI_FAIL 3 +#define ADIS16400_DIAG_STAT_FLASH_UPT 2 +#define ADIS16400_DIAG_STAT_POWER_HIGH 1 +#define ADIS16400_DIAG_STAT_POWER_LOW 0 + +/* GLOB_CMD */ +#define ADIS16400_GLOB_CMD_SW_RESET (1<<7) +#define ADIS16400_GLOB_CMD_P_AUTO_NULL (1<<4) +#define ADIS16400_GLOB_CMD_FLASH_UPD (1<<3) +#define ADIS16400_GLOB_CMD_DAC_LATCH (1<<2) +#define ADIS16400_GLOB_CMD_FAC_CALIB (1<<1) +#define ADIS16400_GLOB_CMD_AUTO_NULL (1<<0) + +/* SLP_CNT */ +#define ADIS16400_SLP_CNT_POWER_OFF (1<<8) + +#define ADIS16334_RATE_DIV_SHIFT 8 +#define ADIS16334_RATE_INT_CLK BIT(0) + +#define ADIS16400_SPI_SLOW (u32)(300 * 1000) +#define ADIS16400_SPI_BURST (u32)(1000 * 1000) +#define ADIS16400_SPI_FAST (u32)(2000 * 1000) + +#define ADIS16400_HAS_PROD_ID BIT(0) +#define ADIS16400_NO_BURST BIT(1) +#define ADIS16400_HAS_SLOW_MODE BIT(2) +#define ADIS16400_HAS_SERIAL_NUMBER BIT(3) + +struct adis16400_state; + +struct adis16400_chip_info { + const struct iio_chan_spec *channels; + const int num_channels; + const long flags; + unsigned int gyro_scale_micro; + unsigned int accel_scale_micro; + int temp_scale_nano; + int temp_offset; + int (*set_freq)(struct adis16400_state *st, unsigned int freq); + int (*get_freq)(struct adis16400_state *st); +}; + +/** + * struct adis16400_state - device instance specific data + * @variant: chip variant info + * @filt_int: integer part of requested filter frequency + * @adis: adis device + **/ +struct adis16400_state { + struct adis16400_chip_info *variant; + int filt_int; + + struct adis adis; +}; + +/* At the moment triggers are only used for ring buffer + * filling. This may change! + */ + +enum { + ADIS16400_SCAN_SUPPLY, + ADIS16400_SCAN_GYRO_X, + ADIS16400_SCAN_GYRO_Y, + ADIS16400_SCAN_GYRO_Z, + ADIS16400_SCAN_ACC_X, + ADIS16400_SCAN_ACC_Y, + ADIS16400_SCAN_ACC_Z, + ADIS16400_SCAN_MAGN_X, + ADIS16400_SCAN_MAGN_Y, + ADIS16400_SCAN_MAGN_Z, + ADIS16400_SCAN_BARO, + ADIS16350_SCAN_TEMP_X, + ADIS16350_SCAN_TEMP_Y, + ADIS16350_SCAN_TEMP_Z, + ADIS16300_SCAN_INCLI_X, + ADIS16300_SCAN_INCLI_Y, + ADIS16400_SCAN_ADC, +}; + +#ifdef CONFIG_IIO_BUFFER + +ssize_t adis16400_read_data_from_ring(struct device *dev, + struct device_attribute *attr, + char *buf); + + +int adis16400_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *scan_mask); +irqreturn_t adis16400_trigger_handler(int irq, void *p); + +#else /* CONFIG_IIO_BUFFER */ + +#define adis16400_update_scan_mode NULL +#define adis16400_trigger_handler NULL + +#endif /* CONFIG_IIO_BUFFER */ + +#endif /* SPI_ADIS16400_H_ */ diff --git a/drivers/iio/imu/adis16400_buffer.c b/drivers/iio/imu/adis16400_buffer.c new file mode 100644 index 000000000000..054c01d6e73c --- /dev/null +++ b/drivers/iio/imu/adis16400_buffer.c @@ -0,0 +1,96 @@ +#include <linux/interrupt.h> +#include <linux/mutex.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/bitops.h> +#include <linux/export.h> + +#include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/trigger_consumer.h> + +#include "adis16400.h" + +int adis16400_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *scan_mask) +{ + struct adis16400_state *st = iio_priv(indio_dev); + struct adis *adis = &st->adis; + uint16_t *tx, *rx; + + if (st->variant->flags & ADIS16400_NO_BURST) + return adis_update_scan_mode(indio_dev, scan_mask); + + kfree(adis->xfer); + kfree(adis->buffer); + + adis->xfer = kcalloc(2, sizeof(*adis->xfer), GFP_KERNEL); + if (!adis->xfer) + return -ENOMEM; + + adis->buffer = kzalloc(indio_dev->scan_bytes + sizeof(u16), + GFP_KERNEL); + if (!adis->buffer) + return -ENOMEM; + + rx = adis->buffer; + tx = adis->buffer + indio_dev->scan_bytes; + + tx[0] = ADIS_READ_REG(ADIS16400_GLOB_CMD); + tx[1] = 0; + + adis->xfer[0].tx_buf = tx; + adis->xfer[0].bits_per_word = 8; + adis->xfer[0].len = 2; + adis->xfer[1].tx_buf = tx; + adis->xfer[1].bits_per_word = 8; + adis->xfer[1].len = indio_dev->scan_bytes; + + spi_message_init(&adis->msg); + spi_message_add_tail(&adis->xfer[0], &adis->msg); + spi_message_add_tail(&adis->xfer[1], &adis->msg); + + return 0; +} + +irqreturn_t adis16400_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct adis16400_state *st = iio_priv(indio_dev); + struct adis *adis = &st->adis; + u32 old_speed_hz = st->adis.spi->max_speed_hz; + int ret; + + if (!adis->buffer) + return -ENOMEM; + + if (!(st->variant->flags & ADIS16400_NO_BURST) && + st->adis.spi->max_speed_hz > ADIS16400_SPI_BURST) { + st->adis.spi->max_speed_hz = ADIS16400_SPI_BURST; + spi_setup(st->adis.spi); + } + + ret = spi_sync(adis->spi, &adis->msg); + if (ret) + dev_err(&adis->spi->dev, "Failed to read data: %d\n", ret); + + if (!(st->variant->flags & ADIS16400_NO_BURST)) { + st->adis.spi->max_speed_hz = old_speed_hz; + spi_setup(st->adis.spi); + } + + /* Guaranteed to be aligned with 8 byte boundary */ + if (indio_dev->scan_timestamp) { + void *b = adis->buffer + indio_dev->scan_bytes - sizeof(s64); + *(s64 *)b = pf->timestamp; + } + + iio_push_to_buffers(indio_dev, adis->buffer); + + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} diff --git a/drivers/iio/imu/adis16400_core.c b/drivers/iio/imu/adis16400_core.c new file mode 100644 index 000000000000..b7f215eab5de --- /dev/null +++ b/drivers/iio/imu/adis16400_core.c @@ -0,0 +1,965 @@ +/* + * adis16400.c support Analog Devices ADIS16400/5 + * 3d 2g Linear Accelerometers, + * 3d Gyroscopes, + * 3d Magnetometers via SPI + * + * Copyright (c) 2009 Manuel Stahl <manuel.stahl@iis.fraunhofer.de> + * Copyright (c) 2007 Jonathan Cameron <jic23@kernel.org> + * Copyright (c) 2011 Analog Devices Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/delay.h> +#include <linux/mutex.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/debugfs.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> + +#include "adis16400.h" + +#ifdef CONFIG_DEBUG_FS + +static ssize_t adis16400_show_serial_number(struct file *file, + char __user *userbuf, size_t count, loff_t *ppos) +{ + struct adis16400_state *st = file->private_data; + u16 lot1, lot2, serial_number; + char buf[16]; + size_t len; + int ret; + + ret = adis_read_reg_16(&st->adis, ADIS16334_LOT_ID1, &lot1); + if (ret < 0) + return ret; + + ret = adis_read_reg_16(&st->adis, ADIS16334_LOT_ID2, &lot2); + if (ret < 0) + return ret; + + ret = adis_read_reg_16(&st->adis, ADIS16334_SERIAL_NUMBER, + &serial_number); + if (ret < 0) + return ret; + + len = snprintf(buf, sizeof(buf), "%.4x-%.4x-%.4x\n", lot1, lot2, + serial_number); + + return simple_read_from_buffer(userbuf, count, ppos, buf, len); +} + +static const struct file_operations adis16400_serial_number_fops = { + .open = simple_open, + .read = adis16400_show_serial_number, + .llseek = default_llseek, + .owner = THIS_MODULE, +}; + +static int adis16400_show_product_id(void *arg, u64 *val) +{ + struct adis16400_state *st = arg; + uint16_t prod_id; + int ret; + + ret = adis_read_reg_16(&st->adis, ADIS16400_PRODUCT_ID, &prod_id); + if (ret < 0) + return ret; + + *val = prod_id; + + return 0; +} +DEFINE_SIMPLE_ATTRIBUTE(adis16400_product_id_fops, + adis16400_show_product_id, NULL, "%lld\n"); + +static int adis16400_show_flash_count(void *arg, u64 *val) +{ + struct adis16400_state *st = arg; + uint16_t flash_count; + int ret; + + ret = adis_read_reg_16(&st->adis, ADIS16400_FLASH_CNT, &flash_count); + if (ret < 0) + return ret; + + *val = flash_count; + + return 0; +} +DEFINE_SIMPLE_ATTRIBUTE(adis16400_flash_count_fops, + adis16400_show_flash_count, NULL, "%lld\n"); + +static int adis16400_debugfs_init(struct iio_dev *indio_dev) +{ + struct adis16400_state *st = iio_priv(indio_dev); + + if (st->variant->flags & ADIS16400_HAS_SERIAL_NUMBER) + debugfs_create_file("serial_number", 0400, + indio_dev->debugfs_dentry, st, + &adis16400_serial_number_fops); + if (st->variant->flags & ADIS16400_HAS_PROD_ID) + debugfs_create_file("product_id", 0400, + indio_dev->debugfs_dentry, st, + &adis16400_product_id_fops); + debugfs_create_file("flash_count", 0400, indio_dev->debugfs_dentry, + st, &adis16400_flash_count_fops); + + return 0; +} + +#else + +static int adis16400_debugfs_init(struct iio_dev *indio_dev) +{ + return 0; +} + +#endif + +enum adis16400_chip_variant { + ADIS16300, + ADIS16334, + ADIS16350, + ADIS16360, + ADIS16362, + ADIS16364, + ADIS16400, + ADIS16448, +}; + +static int adis16334_get_freq(struct adis16400_state *st) +{ + int ret; + uint16_t t; + + ret = adis_read_reg_16(&st->adis, ADIS16400_SMPL_PRD, &t); + if (ret < 0) + return ret; + + t >>= ADIS16334_RATE_DIV_SHIFT; + + return 819200 >> t; +} + +static int adis16334_set_freq(struct adis16400_state *st, unsigned int freq) +{ + unsigned int t; + + if (freq < 819200) + t = ilog2(819200 / freq); + else + t = 0; + + if (t > 0x31) + t = 0x31; + + t <<= ADIS16334_RATE_DIV_SHIFT; + t |= ADIS16334_RATE_INT_CLK; + + return adis_write_reg_16(&st->adis, ADIS16400_SMPL_PRD, t); +} + +static int adis16400_get_freq(struct adis16400_state *st) +{ + int sps, ret; + uint16_t t; + + ret = adis_read_reg_16(&st->adis, ADIS16400_SMPL_PRD, &t); + if (ret < 0) + return ret; + + sps = (t & ADIS16400_SMPL_PRD_TIME_BASE) ? 52851 : 1638404; + sps /= (t & ADIS16400_SMPL_PRD_DIV_MASK) + 1; + + return sps; +} + +static int adis16400_set_freq(struct adis16400_state *st, unsigned int freq) +{ + unsigned int t; + uint8_t val = 0; + + t = 1638404 / freq; + if (t >= 128) { + val |= ADIS16400_SMPL_PRD_TIME_BASE; + t = 52851 / freq; + if (t >= 128) + t = 127; + } else if (t != 0) { + t--; + } + + val |= t; + + if (t >= 0x0A || (val & ADIS16400_SMPL_PRD_TIME_BASE)) + st->adis.spi->max_speed_hz = ADIS16400_SPI_SLOW; + else + st->adis.spi->max_speed_hz = ADIS16400_SPI_FAST; + + return adis_write_reg_8(&st->adis, ADIS16400_SMPL_PRD, val); +} + +static ssize_t adis16400_read_frequency(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct adis16400_state *st = iio_priv(indio_dev); + int ret; + + ret = st->variant->get_freq(st); + if (ret < 0) + return ret; + + return sprintf(buf, "%d.%.3d\n", ret / 1000, ret % 1000); +} + +static const unsigned adis16400_3db_divisors[] = { + [0] = 2, /* Special case */ + [1] = 6, + [2] = 12, + [3] = 25, + [4] = 50, + [5] = 100, + [6] = 200, + [7] = 200, /* Not a valid setting */ +}; + +static int adis16400_set_filter(struct iio_dev *indio_dev, int sps, int val) +{ + struct adis16400_state *st = iio_priv(indio_dev); + uint16_t val16; + int i, ret; + + for (i = ARRAY_SIZE(adis16400_3db_divisors) - 1; i >= 1; i--) { + if (sps / adis16400_3db_divisors[i] >= val) + break; + } + + ret = adis_read_reg_16(&st->adis, ADIS16400_SENS_AVG, &val16); + if (ret < 0) + return ret; + + ret = adis_write_reg_16(&st->adis, ADIS16400_SENS_AVG, + (val16 & ~0x07) | i); + return ret; +} + +static ssize_t adis16400_write_frequency(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct adis16400_state *st = iio_priv(indio_dev); + int i, f, val; + int ret; + + ret = iio_str_to_fixpoint(buf, 100, &i, &f); + if (ret) + return ret; + + val = i * 1000 + f; + + if (val <= 0) + return -EINVAL; + + mutex_lock(&indio_dev->mlock); + st->variant->set_freq(st, val); + mutex_unlock(&indio_dev->mlock); + + return ret ? ret : len; +} + +/* Power down the device */ +static int adis16400_stop_device(struct iio_dev *indio_dev) +{ + struct adis16400_state *st = iio_priv(indio_dev); + int ret; + + ret = adis_write_reg_16(&st->adis, ADIS16400_SLP_CNT, + ADIS16400_SLP_CNT_POWER_OFF); + if (ret) + dev_err(&indio_dev->dev, + "problem with turning device off: SLP_CNT"); + + return ret; +} + +static int adis16400_initial_setup(struct iio_dev *indio_dev) +{ + struct adis16400_state *st = iio_priv(indio_dev); + uint16_t prod_id, smp_prd; + unsigned int device_id; + int ret; + + /* use low spi speed for init if the device has a slow mode */ + if (st->variant->flags & ADIS16400_HAS_SLOW_MODE) + st->adis.spi->max_speed_hz = ADIS16400_SPI_SLOW; + else + st->adis.spi->max_speed_hz = ADIS16400_SPI_FAST; + st->adis.spi->mode = SPI_MODE_3; + spi_setup(st->adis.spi); + + ret = adis_initial_startup(&st->adis); + if (ret) + return ret; + + if (st->variant->flags & ADIS16400_HAS_PROD_ID) { + ret = adis_read_reg_16(&st->adis, + ADIS16400_PRODUCT_ID, &prod_id); + if (ret) + goto err_ret; + + sscanf(indio_dev->name, "adis%u\n", &device_id); + + if (prod_id != device_id) + dev_warn(&indio_dev->dev, "Device ID(%u) and product ID(%u) do not match.", + device_id, prod_id); + + dev_info(&indio_dev->dev, "%s: prod_id 0x%04x at CS%d (irq %d)\n", + indio_dev->name, prod_id, + st->adis.spi->chip_select, st->adis.spi->irq); + } + /* use high spi speed if possible */ + if (st->variant->flags & ADIS16400_HAS_SLOW_MODE) { + ret = adis_read_reg_16(&st->adis, ADIS16400_SMPL_PRD, &smp_prd); + if (ret) + goto err_ret; + + if ((smp_prd & ADIS16400_SMPL_PRD_DIV_MASK) < 0x0A) { + st->adis.spi->max_speed_hz = ADIS16400_SPI_FAST; + spi_setup(st->adis.spi); + } + } + +err_ret: + return ret; +} + +static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, + adis16400_read_frequency, + adis16400_write_frequency); + +static const uint8_t adis16400_addresses[] = { + [ADIS16400_SCAN_GYRO_X] = ADIS16400_XGYRO_OFF, + [ADIS16400_SCAN_GYRO_Y] = ADIS16400_YGYRO_OFF, + [ADIS16400_SCAN_GYRO_Z] = ADIS16400_ZGYRO_OFF, + [ADIS16400_SCAN_ACC_X] = ADIS16400_XACCL_OFF, + [ADIS16400_SCAN_ACC_Y] = ADIS16400_YACCL_OFF, + [ADIS16400_SCAN_ACC_Z] = ADIS16400_ZACCL_OFF, +}; + +static int adis16400_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long info) +{ + struct adis16400_state *st = iio_priv(indio_dev); + int ret, sps; + + switch (info) { + case IIO_CHAN_INFO_CALIBBIAS: + mutex_lock(&indio_dev->mlock); + ret = adis_write_reg_16(&st->adis, + adis16400_addresses[chan->scan_index], val); + mutex_unlock(&indio_dev->mlock); + return ret; + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + /* + * Need to cache values so we can update if the frequency + * changes. + */ + mutex_lock(&indio_dev->mlock); + st->filt_int = val; + /* Work out update to current value */ + sps = st->variant->get_freq(st); + if (sps < 0) { + mutex_unlock(&indio_dev->mlock); + return sps; + } + + ret = adis16400_set_filter(indio_dev, sps, + val * 1000 + val2 / 1000); + mutex_unlock(&indio_dev->mlock); + return ret; + default: + return -EINVAL; + } +} + +static int adis16400_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, int *val2, long info) +{ + struct adis16400_state *st = iio_priv(indio_dev); + int16_t val16; + int ret; + + switch (info) { + case IIO_CHAN_INFO_RAW: + return adis_single_conversion(indio_dev, chan, 0, val); + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ANGL_VEL: + *val = 0; + *val2 = st->variant->gyro_scale_micro; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_VOLTAGE: + *val = 0; + if (chan->channel == 0) { + *val = 2; + *val2 = 418000; /* 2.418 mV */ + } else { + *val = 0; + *val2 = 805800; /* 805.8 uV */ + } + return IIO_VAL_INT_PLUS_MICRO; + case IIO_ACCEL: + *val = 0; + *val2 = st->variant->accel_scale_micro; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_MAGN: + *val = 0; + *val2 = 500; /* 0.5 mgauss */ + return IIO_VAL_INT_PLUS_MICRO; + case IIO_TEMP: + *val = st->variant->temp_scale_nano / 1000000; + *val2 = (st->variant->temp_scale_nano % 1000000); + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_CALIBBIAS: + mutex_lock(&indio_dev->mlock); + ret = adis_read_reg_16(&st->adis, + adis16400_addresses[chan->scan_index], &val16); + mutex_unlock(&indio_dev->mlock); + if (ret) + return ret; + val16 = ((val16 & 0xFFF) << 4) >> 4; + *val = val16; + return IIO_VAL_INT; + case IIO_CHAN_INFO_OFFSET: + /* currently only temperature */ + *val = st->variant->temp_offset; + return IIO_VAL_INT; + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + mutex_lock(&indio_dev->mlock); + /* Need both the number of taps and the sampling frequency */ + ret = adis_read_reg_16(&st->adis, + ADIS16400_SENS_AVG, + &val16); + if (ret < 0) { + mutex_unlock(&indio_dev->mlock); + return ret; + } + ret = st->variant->get_freq(st); + if (ret >= 0) { + ret /= adis16400_3db_divisors[val16 & 0x07]; + *val = ret / 1000; + *val2 = (ret % 1000) * 1000; + } + mutex_unlock(&indio_dev->mlock); + if (ret < 0) + return ret; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } +} + +#define ADIS16400_VOLTAGE_CHAN(addr, bits, name, si) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .channel = 0, \ + .extend_name = name, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ + .address = (addr), \ + .scan_index = (si), \ + .scan_type = { \ + .sign = 'u', \ + .realbits = (bits), \ + .storagebits = 16, \ + .shift = 0, \ + .endianness = IIO_BE, \ + }, \ +} + +#define ADIS16400_SUPPLY_CHAN(addr, bits) \ + ADIS16400_VOLTAGE_CHAN(addr, bits, "supply", ADIS16400_SCAN_SUPPLY) + +#define ADIS16400_AUX_ADC_CHAN(addr, bits) \ + ADIS16400_VOLTAGE_CHAN(addr, bits, NULL, ADIS16400_SCAN_ADC) + +#define ADIS16400_GYRO_CHAN(mod, addr, bits) { \ + .type = IIO_ANGL_VEL, \ + .modified = 1, \ + .channel2 = IIO_MOD_ ## mod, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT | \ + IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT, \ + .address = addr, \ + .scan_index = ADIS16400_SCAN_GYRO_ ## mod, \ + .scan_type = { \ + .sign = 's', \ + .realbits = (bits), \ + .storagebits = 16, \ + .shift = 0, \ + .endianness = IIO_BE, \ + }, \ +} + +#define ADIS16400_ACCEL_CHAN(mod, addr, bits) { \ + .type = IIO_ACCEL, \ + .modified = 1, \ + .channel2 = IIO_MOD_ ## mod, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT | \ + IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT, \ + .address = (addr), \ + .scan_index = ADIS16400_SCAN_ACC_ ## mod, \ + .scan_type = { \ + .sign = 's', \ + .realbits = (bits), \ + .storagebits = 16, \ + .shift = 0, \ + .endianness = IIO_BE, \ + }, \ +} + +#define ADIS16400_MAGN_CHAN(mod, addr, bits) { \ + .type = IIO_MAGN, \ + .modified = 1, \ + .channel2 = IIO_MOD_ ## mod, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT | \ + IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT, \ + .address = (addr), \ + .scan_index = ADIS16400_SCAN_MAGN_ ## mod, \ + .scan_type = { \ + .sign = 's', \ + .realbits = (bits), \ + .storagebits = 16, \ + .shift = 0, \ + .endianness = IIO_BE, \ + }, \ +} + +#define ADIS16400_MOD_TEMP_NAME_X "x" +#define ADIS16400_MOD_TEMP_NAME_Y "y" +#define ADIS16400_MOD_TEMP_NAME_Z "z" + +#define ADIS16400_MOD_TEMP_CHAN(mod, addr, bits) { \ + .type = IIO_TEMP, \ + .indexed = 1, \ + .channel = 0, \ + .extend_name = ADIS16400_MOD_TEMP_NAME_ ## mod, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT, \ + .address = (addr), \ + .scan_index = ADIS16350_SCAN_TEMP_ ## mod, \ + .scan_type = { \ + .sign = 's', \ + .realbits = (bits), \ + .storagebits = 16, \ + .shift = 0, \ + .endianness = IIO_BE, \ + }, \ +} + +#define ADIS16400_TEMP_CHAN(addr, bits) { \ + .type = IIO_TEMP, \ + .indexed = 1, \ + .channel = 0, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ + .address = (addr), \ + .scan_index = ADIS16350_SCAN_TEMP_X, \ + .scan_type = { \ + .sign = 's', \ + .realbits = (bits), \ + .storagebits = 16, \ + .shift = 0, \ + .endianness = IIO_BE, \ + }, \ +} + +#define ADIS16400_INCLI_CHAN(mod, addr, bits) { \ + .type = IIO_INCLI, \ + .modified = 1, \ + .channel2 = IIO_MOD_ ## mod, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT, \ + .address = (addr), \ + .scan_index = ADIS16300_SCAN_INCLI_ ## mod, \ + .scan_type = { \ + .sign = 's', \ + .realbits = (bits), \ + .storagebits = 16, \ + .shift = 0, \ + .endianness = IIO_BE, \ + }, \ +} + +static const struct iio_chan_spec adis16400_channels[] = { + ADIS16400_SUPPLY_CHAN(ADIS16400_SUPPLY_OUT, 14), + ADIS16400_GYRO_CHAN(X, ADIS16400_XGYRO_OUT, 14), + ADIS16400_GYRO_CHAN(Y, ADIS16400_YGYRO_OUT, 14), + ADIS16400_GYRO_CHAN(Z, ADIS16400_ZGYRO_OUT, 14), + ADIS16400_ACCEL_CHAN(X, ADIS16400_XACCL_OUT, 14), + ADIS16400_ACCEL_CHAN(Y, ADIS16400_YACCL_OUT, 14), + ADIS16400_ACCEL_CHAN(Z, ADIS16400_ZACCL_OUT, 14), + ADIS16400_MAGN_CHAN(X, ADIS16400_XMAGN_OUT, 14), + ADIS16400_MAGN_CHAN(Y, ADIS16400_YMAGN_OUT, 14), + ADIS16400_MAGN_CHAN(Z, ADIS16400_ZMAGN_OUT, 14), + ADIS16400_TEMP_CHAN(ADIS16400_TEMP_OUT, 12), + ADIS16400_AUX_ADC_CHAN(ADIS16400_AUX_ADC, 12), + IIO_CHAN_SOFT_TIMESTAMP(12) +}; + +static const struct iio_chan_spec adis16448_channels[] = { + ADIS16400_GYRO_CHAN(X, ADIS16400_XGYRO_OUT, 16), + ADIS16400_GYRO_CHAN(Y, ADIS16400_YGYRO_OUT, 16), + ADIS16400_GYRO_CHAN(Z, ADIS16400_ZGYRO_OUT, 16), + ADIS16400_ACCEL_CHAN(X, ADIS16400_XACCL_OUT, 16), + ADIS16400_ACCEL_CHAN(Y, ADIS16400_YACCL_OUT, 16), + ADIS16400_ACCEL_CHAN(Z, ADIS16400_ZACCL_OUT, 16), + ADIS16400_MAGN_CHAN(X, ADIS16400_XMAGN_OUT, 16), + ADIS16400_MAGN_CHAN(Y, ADIS16400_YMAGN_OUT, 16), + ADIS16400_MAGN_CHAN(Z, ADIS16400_ZMAGN_OUT, 16), + { + .type = IIO_PRESSURE, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SHARED_BIT, + .address = ADIS16448_BARO_OUT, + .scan_index = ADIS16400_SCAN_BARO, + .scan_type = IIO_ST('s', 16, 16, 0), + }, + ADIS16400_TEMP_CHAN(ADIS16448_TEMP_OUT, 12), + IIO_CHAN_SOFT_TIMESTAMP(11) +}; + +static const struct iio_chan_spec adis16350_channels[] = { + ADIS16400_SUPPLY_CHAN(ADIS16400_SUPPLY_OUT, 12), + ADIS16400_GYRO_CHAN(X, ADIS16400_XGYRO_OUT, 14), + ADIS16400_GYRO_CHAN(Y, ADIS16400_YGYRO_OUT, 14), + ADIS16400_GYRO_CHAN(Z, ADIS16400_ZGYRO_OUT, 14), + ADIS16400_ACCEL_CHAN(X, ADIS16400_XACCL_OUT, 14), + ADIS16400_ACCEL_CHAN(Y, ADIS16400_YACCL_OUT, 14), + ADIS16400_ACCEL_CHAN(Z, ADIS16400_ZACCL_OUT, 14), + ADIS16400_MAGN_CHAN(X, ADIS16400_XMAGN_OUT, 14), + ADIS16400_MAGN_CHAN(Y, ADIS16400_YMAGN_OUT, 14), + ADIS16400_MAGN_CHAN(Z, ADIS16400_ZMAGN_OUT, 14), + ADIS16400_AUX_ADC_CHAN(ADIS16300_AUX_ADC, 12), + ADIS16400_MOD_TEMP_CHAN(X, ADIS16350_XTEMP_OUT, 12), + ADIS16400_MOD_TEMP_CHAN(Y, ADIS16350_YTEMP_OUT, 12), + ADIS16400_MOD_TEMP_CHAN(Z, ADIS16350_ZTEMP_OUT, 12), + IIO_CHAN_SOFT_TIMESTAMP(11) +}; + +static const struct iio_chan_spec adis16300_channels[] = { + ADIS16400_SUPPLY_CHAN(ADIS16400_SUPPLY_OUT, 12), + ADIS16400_GYRO_CHAN(X, ADIS16400_XGYRO_OUT, 14), + ADIS16400_ACCEL_CHAN(X, ADIS16400_XACCL_OUT, 14), + ADIS16400_ACCEL_CHAN(Y, ADIS16400_YACCL_OUT, 14), + ADIS16400_ACCEL_CHAN(Z, ADIS16400_ZACCL_OUT, 14), + ADIS16400_TEMP_CHAN(ADIS16350_XTEMP_OUT, 12), + ADIS16400_AUX_ADC_CHAN(ADIS16300_AUX_ADC, 12), + ADIS16400_INCLI_CHAN(X, ADIS16300_PITCH_OUT, 13), + ADIS16400_INCLI_CHAN(Y, ADIS16300_ROLL_OUT, 13), + IIO_CHAN_SOFT_TIMESTAMP(14) +}; + +static const struct iio_chan_spec adis16334_channels[] = { + ADIS16400_GYRO_CHAN(X, ADIS16400_XGYRO_OUT, 14), + ADIS16400_GYRO_CHAN(Y, ADIS16400_YGYRO_OUT, 14), + ADIS16400_GYRO_CHAN(Z, ADIS16400_ZGYRO_OUT, 14), + ADIS16400_ACCEL_CHAN(X, ADIS16400_XACCL_OUT, 14), + ADIS16400_ACCEL_CHAN(Y, ADIS16400_YACCL_OUT, 14), + ADIS16400_ACCEL_CHAN(Z, ADIS16400_ZACCL_OUT, 14), + ADIS16400_TEMP_CHAN(ADIS16350_XTEMP_OUT, 12), + IIO_CHAN_SOFT_TIMESTAMP(8) +}; + +static struct attribute *adis16400_attributes[] = { + &iio_dev_attr_sampling_frequency.dev_attr.attr, + NULL +}; + +static const struct attribute_group adis16400_attribute_group = { + .attrs = adis16400_attributes, +}; + +static struct adis16400_chip_info adis16400_chips[] = { + [ADIS16300] = { + .channels = adis16300_channels, + .num_channels = ARRAY_SIZE(adis16300_channels), + .flags = ADIS16400_HAS_SLOW_MODE, + .gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */ + .accel_scale_micro = 5884, + .temp_scale_nano = 140000000, /* 0.14 C */ + .temp_offset = 25000000 / 140000, /* 25 C = 0x00 */ + .set_freq = adis16400_set_freq, + .get_freq = adis16400_get_freq, + }, + [ADIS16334] = { + .channels = adis16334_channels, + .num_channels = ARRAY_SIZE(adis16334_channels), + .flags = ADIS16400_HAS_PROD_ID | ADIS16400_NO_BURST | + ADIS16400_HAS_SERIAL_NUMBER, + .gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */ + .accel_scale_micro = IIO_G_TO_M_S_2(1000), /* 1 mg */ + .temp_scale_nano = 67850000, /* 0.06785 C */ + .temp_offset = 25000000 / 67850, /* 25 C = 0x00 */ + .set_freq = adis16334_set_freq, + .get_freq = adis16334_get_freq, + }, + [ADIS16350] = { + .channels = adis16350_channels, + .num_channels = ARRAY_SIZE(adis16350_channels), + .gyro_scale_micro = IIO_DEGREE_TO_RAD(73260), /* 0.07326 deg/s */ + .accel_scale_micro = IIO_G_TO_M_S_2(2522), /* 0.002522 g */ + .temp_scale_nano = 145300000, /* 0.1453 C */ + .temp_offset = 25000000 / 145300, /* 25 C = 0x00 */ + .flags = ADIS16400_NO_BURST | ADIS16400_HAS_SLOW_MODE, + .set_freq = adis16400_set_freq, + .get_freq = adis16400_get_freq, + }, + [ADIS16360] = { + .channels = adis16350_channels, + .num_channels = ARRAY_SIZE(adis16350_channels), + .flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE | + ADIS16400_HAS_SERIAL_NUMBER, + .gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */ + .accel_scale_micro = IIO_G_TO_M_S_2(3333), /* 3.333 mg */ + .temp_scale_nano = 136000000, /* 0.136 C */ + .temp_offset = 25000000 / 136000, /* 25 C = 0x00 */ + .set_freq = adis16400_set_freq, + .get_freq = adis16400_get_freq, + }, + [ADIS16362] = { + .channels = adis16350_channels, + .num_channels = ARRAY_SIZE(adis16350_channels), + .flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE | + ADIS16400_HAS_SERIAL_NUMBER, + .gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */ + .accel_scale_micro = IIO_G_TO_M_S_2(333), /* 0.333 mg */ + .temp_scale_nano = 136000000, /* 0.136 C */ + .temp_offset = 25000000 / 136000, /* 25 C = 0x00 */ + .set_freq = adis16400_set_freq, + .get_freq = adis16400_get_freq, + }, + [ADIS16364] = { + .channels = adis16350_channels, + .num_channels = ARRAY_SIZE(adis16350_channels), + .flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE | + ADIS16400_HAS_SERIAL_NUMBER, + .gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */ + .accel_scale_micro = IIO_G_TO_M_S_2(1000), /* 1 mg */ + .temp_scale_nano = 136000000, /* 0.136 C */ + .temp_offset = 25000000 / 136000, /* 25 C = 0x00 */ + .set_freq = adis16400_set_freq, + .get_freq = adis16400_get_freq, + }, + [ADIS16400] = { + .channels = adis16400_channels, + .num_channels = ARRAY_SIZE(adis16400_channels), + .flags = ADIS16400_HAS_PROD_ID | ADIS16400_HAS_SLOW_MODE, + .gyro_scale_micro = IIO_DEGREE_TO_RAD(50000), /* 0.05 deg/s */ + .accel_scale_micro = IIO_G_TO_M_S_2(3333), /* 3.333 mg */ + .temp_scale_nano = 140000000, /* 0.14 C */ + .temp_offset = 25000000 / 140000, /* 25 C = 0x00 */ + .set_freq = adis16400_set_freq, + .get_freq = adis16400_get_freq, + }, + [ADIS16448] = { + .channels = adis16448_channels, + .num_channels = ARRAY_SIZE(adis16448_channels), + .flags = ADIS16400_HAS_PROD_ID | + ADIS16400_HAS_SERIAL_NUMBER, + .gyro_scale_micro = IIO_DEGREE_TO_RAD(10000), /* 0.01 deg/s */ + .accel_scale_micro = IIO_G_TO_M_S_2(833), /* 1/1200 g */ + .temp_scale_nano = 73860000, /* 0.07386 C */ + .temp_offset = 31000000 / 73860, /* 31 C = 0x00 */ + .set_freq = adis16334_set_freq, + .get_freq = adis16334_get_freq, + } +}; + +static const struct iio_info adis16400_info = { + .driver_module = THIS_MODULE, + .read_raw = &adis16400_read_raw, + .write_raw = &adis16400_write_raw, + .attrs = &adis16400_attribute_group, + .update_scan_mode = adis16400_update_scan_mode, + .debugfs_reg_access = adis_debugfs_reg_access, +}; + +static const unsigned long adis16400_burst_scan_mask[] = { + ~0UL, + 0, +}; + +static const char * const adis16400_status_error_msgs[] = { + [ADIS16400_DIAG_STAT_ZACCL_FAIL] = "Z-axis accelerometer self-test failure", + [ADIS16400_DIAG_STAT_YACCL_FAIL] = "Y-axis accelerometer self-test failure", + [ADIS16400_DIAG_STAT_XACCL_FAIL] = "X-axis accelerometer self-test failure", + [ADIS16400_DIAG_STAT_XGYRO_FAIL] = "X-axis gyroscope self-test failure", + [ADIS16400_DIAG_STAT_YGYRO_FAIL] = "Y-axis gyroscope self-test failure", + [ADIS16400_DIAG_STAT_ZGYRO_FAIL] = "Z-axis gyroscope self-test failure", + [ADIS16400_DIAG_STAT_ALARM2] = "Alarm 2 active", + [ADIS16400_DIAG_STAT_ALARM1] = "Alarm 1 active", + [ADIS16400_DIAG_STAT_FLASH_CHK] = "Flash checksum error", + [ADIS16400_DIAG_STAT_SELF_TEST] = "Self test error", + [ADIS16400_DIAG_STAT_OVERFLOW] = "Sensor overrange", + [ADIS16400_DIAG_STAT_SPI_FAIL] = "SPI failure", + [ADIS16400_DIAG_STAT_FLASH_UPT] = "Flash update failed", + [ADIS16400_DIAG_STAT_POWER_HIGH] = "Power supply above 5.25V", + [ADIS16400_DIAG_STAT_POWER_LOW] = "Power supply below 4.75V", +}; + +static const struct adis_data adis16400_data = { + .msc_ctrl_reg = ADIS16400_MSC_CTRL, + .glob_cmd_reg = ADIS16400_GLOB_CMD, + .diag_stat_reg = ADIS16400_DIAG_STAT, + + .read_delay = 50, + .write_delay = 50, + + .self_test_mask = ADIS16400_MSC_CTRL_MEM_TEST, + .startup_delay = ADIS16400_STARTUP_DELAY, + + .status_error_msgs = adis16400_status_error_msgs, + .status_error_mask = BIT(ADIS16400_DIAG_STAT_ZACCL_FAIL) | + BIT(ADIS16400_DIAG_STAT_YACCL_FAIL) | + BIT(ADIS16400_DIAG_STAT_XACCL_FAIL) | + BIT(ADIS16400_DIAG_STAT_XGYRO_FAIL) | + BIT(ADIS16400_DIAG_STAT_YGYRO_FAIL) | + BIT(ADIS16400_DIAG_STAT_ZGYRO_FAIL) | + BIT(ADIS16400_DIAG_STAT_ALARM2) | + BIT(ADIS16400_DIAG_STAT_ALARM1) | + BIT(ADIS16400_DIAG_STAT_FLASH_CHK) | + BIT(ADIS16400_DIAG_STAT_SELF_TEST) | + BIT(ADIS16400_DIAG_STAT_OVERFLOW) | + BIT(ADIS16400_DIAG_STAT_SPI_FAIL) | + BIT(ADIS16400_DIAG_STAT_FLASH_UPT) | + BIT(ADIS16400_DIAG_STAT_POWER_HIGH) | + BIT(ADIS16400_DIAG_STAT_POWER_LOW), +}; + +static int adis16400_probe(struct spi_device *spi) +{ + struct adis16400_state *st; + struct iio_dev *indio_dev; + int ret; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) + return -ENOMEM; + + st = iio_priv(indio_dev); + /* this is only used for removal purposes */ + spi_set_drvdata(spi, indio_dev); + + /* setup the industrialio driver allocated elements */ + st->variant = &adis16400_chips[spi_get_device_id(spi)->driver_data]; + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->channels = st->variant->channels; + indio_dev->num_channels = st->variant->num_channels; + indio_dev->info = &adis16400_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + if (!(st->variant->flags & ADIS16400_NO_BURST)) + indio_dev->available_scan_masks = adis16400_burst_scan_mask; + + ret = adis_init(&st->adis, indio_dev, spi, &adis16400_data); + if (ret) + goto error_free_dev; + + ret = adis_setup_buffer_and_trigger(&st->adis, indio_dev, + adis16400_trigger_handler); + if (ret) + goto error_free_dev; + + /* Get the device into a sane initial state */ + ret = adis16400_initial_setup(indio_dev); + if (ret) + goto error_cleanup_buffer; + ret = iio_device_register(indio_dev); + if (ret) + goto error_cleanup_buffer; + + adis16400_debugfs_init(indio_dev); + return 0; + +error_cleanup_buffer: + adis_cleanup_buffer_and_trigger(&st->adis, indio_dev); +error_free_dev: + iio_device_free(indio_dev); + return ret; +} + +static int adis16400_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct adis16400_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + adis16400_stop_device(indio_dev); + + adis_cleanup_buffer_and_trigger(&st->adis, indio_dev); + + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id adis16400_id[] = { + {"adis16300", ADIS16300}, + {"adis16334", ADIS16334}, + {"adis16350", ADIS16350}, + {"adis16354", ADIS16350}, + {"adis16355", ADIS16350}, + {"adis16360", ADIS16360}, + {"adis16362", ADIS16362}, + {"adis16364", ADIS16364}, + {"adis16365", ADIS16360}, + {"adis16400", ADIS16400}, + {"adis16405", ADIS16400}, + {"adis16448", ADIS16448}, + {} +}; +MODULE_DEVICE_TABLE(spi, adis16400_id); + +static struct spi_driver adis16400_driver = { + .driver = { + .name = "adis16400", + .owner = THIS_MODULE, + }, + .id_table = adis16400_id, + .probe = adis16400_probe, + .remove = adis16400_remove, +}; +module_spi_driver(adis16400_driver); + +MODULE_AUTHOR("Manuel Stahl <manuel.stahl@iis.fraunhofer.de>"); +MODULE_DESCRIPTION("Analog Devices ADIS16400/5 IMU SPI driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c new file mode 100644 index 000000000000..8c26a5f7cd5d --- /dev/null +++ b/drivers/iio/imu/adis16480.c @@ -0,0 +1,924 @@ +/* + * ADIS16480 and similar IMUs driver + * + * Copyright 2012 Analog Devices Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/mutex.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/imu/adis.h> + +#include <linux/debugfs.h> + +#define ADIS16480_PAGE_SIZE 0x80 + +#define ADIS16480_REG(page, reg) ((page) * ADIS16480_PAGE_SIZE + (reg)) + +#define ADIS16480_REG_PAGE_ID 0x00 /* Same address on each page */ +#define ADIS16480_REG_SEQ_CNT ADIS16480_REG(0x00, 0x06) +#define ADIS16480_REG_SYS_E_FLA ADIS16480_REG(0x00, 0x08) +#define ADIS16480_REG_DIAG_STS ADIS16480_REG(0x00, 0x0A) +#define ADIS16480_REG_ALM_STS ADIS16480_REG(0x00, 0x0C) +#define ADIS16480_REG_TEMP_OUT ADIS16480_REG(0x00, 0x0E) +#define ADIS16480_REG_X_GYRO_OUT ADIS16480_REG(0x00, 0x10) +#define ADIS16480_REG_Y_GYRO_OUT ADIS16480_REG(0x00, 0x14) +#define ADIS16480_REG_Z_GYRO_OUT ADIS16480_REG(0x00, 0x18) +#define ADIS16480_REG_X_ACCEL_OUT ADIS16480_REG(0x00, 0x1C) +#define ADIS16480_REG_Y_ACCEL_OUT ADIS16480_REG(0x00, 0x20) +#define ADIS16480_REG_Z_ACCEL_OUT ADIS16480_REG(0x00, 0x24) +#define ADIS16480_REG_X_MAGN_OUT ADIS16480_REG(0x00, 0x28) +#define ADIS16480_REG_Y_MAGN_OUT ADIS16480_REG(0x00, 0x2A) +#define ADIS16480_REG_Z_MAGN_OUT ADIS16480_REG(0x00, 0x2C) +#define ADIS16480_REG_BAROM_OUT ADIS16480_REG(0x00, 0x2E) +#define ADIS16480_REG_X_DELTAANG_OUT ADIS16480_REG(0x00, 0x40) +#define ADIS16480_REG_Y_DELTAANG_OUT ADIS16480_REG(0x00, 0x44) +#define ADIS16480_REG_Z_DELTAANG_OUT ADIS16480_REG(0x00, 0x48) +#define ADIS16480_REG_X_DELTAVEL_OUT ADIS16480_REG(0x00, 0x4C) +#define ADIS16480_REG_Y_DELTAVEL_OUT ADIS16480_REG(0x00, 0x50) +#define ADIS16480_REG_Z_DELTAVEL_OUT ADIS16480_REG(0x00, 0x54) +#define ADIS16480_REG_PROD_ID ADIS16480_REG(0x00, 0x7E) + +#define ADIS16480_REG_X_GYRO_SCALE ADIS16480_REG(0x02, 0x04) +#define ADIS16480_REG_Y_GYRO_SCALE ADIS16480_REG(0x02, 0x06) +#define ADIS16480_REG_Z_GYRO_SCALE ADIS16480_REG(0x02, 0x08) +#define ADIS16480_REG_X_ACCEL_SCALE ADIS16480_REG(0x02, 0x0A) +#define ADIS16480_REG_Y_ACCEL_SCALE ADIS16480_REG(0x02, 0x0C) +#define ADIS16480_REG_Z_ACCEL_SCALE ADIS16480_REG(0x02, 0x0E) +#define ADIS16480_REG_X_GYRO_BIAS ADIS16480_REG(0x02, 0x10) +#define ADIS16480_REG_Y_GYRO_BIAS ADIS16480_REG(0x02, 0x14) +#define ADIS16480_REG_Z_GYRO_BIAS ADIS16480_REG(0x02, 0x18) +#define ADIS16480_REG_X_ACCEL_BIAS ADIS16480_REG(0x02, 0x1C) +#define ADIS16480_REG_Y_ACCEL_BIAS ADIS16480_REG(0x02, 0x20) +#define ADIS16480_REG_Z_ACCEL_BIAS ADIS16480_REG(0x02, 0x24) +#define ADIS16480_REG_X_HARD_IRON ADIS16480_REG(0x02, 0x28) +#define ADIS16480_REG_Y_HARD_IRON ADIS16480_REG(0x02, 0x2A) +#define ADIS16480_REG_Z_HARD_IRON ADIS16480_REG(0x02, 0x2C) +#define ADIS16480_REG_BAROM_BIAS ADIS16480_REG(0x02, 0x40) +#define ADIS16480_REG_FLASH_CNT ADIS16480_REG(0x02, 0x7C) + +#define ADIS16480_REG_GLOB_CMD ADIS16480_REG(0x03, 0x02) +#define ADIS16480_REG_FNCTIO_CTRL ADIS16480_REG(0x03, 0x06) +#define ADIS16480_REG_GPIO_CTRL ADIS16480_REG(0x03, 0x08) +#define ADIS16480_REG_CONFIG ADIS16480_REG(0x03, 0x0A) +#define ADIS16480_REG_DEC_RATE ADIS16480_REG(0x03, 0x0C) +#define ADIS16480_REG_SLP_CNT ADIS16480_REG(0x03, 0x10) +#define ADIS16480_REG_FILTER_BNK0 ADIS16480_REG(0x03, 0x16) +#define ADIS16480_REG_FILTER_BNK1 ADIS16480_REG(0x03, 0x18) +#define ADIS16480_REG_ALM_CNFG0 ADIS16480_REG(0x03, 0x20) +#define ADIS16480_REG_ALM_CNFG1 ADIS16480_REG(0x03, 0x22) +#define ADIS16480_REG_ALM_CNFG2 ADIS16480_REG(0x03, 0x24) +#define ADIS16480_REG_XG_ALM_MAGN ADIS16480_REG(0x03, 0x28) +#define ADIS16480_REG_YG_ALM_MAGN ADIS16480_REG(0x03, 0x2A) +#define ADIS16480_REG_ZG_ALM_MAGN ADIS16480_REG(0x03, 0x2C) +#define ADIS16480_REG_XA_ALM_MAGN ADIS16480_REG(0x03, 0x2E) +#define ADIS16480_REG_YA_ALM_MAGN ADIS16480_REG(0x03, 0x30) +#define ADIS16480_REG_ZA_ALM_MAGN ADIS16480_REG(0x03, 0x32) +#define ADIS16480_REG_XM_ALM_MAGN ADIS16480_REG(0x03, 0x34) +#define ADIS16480_REG_YM_ALM_MAGN ADIS16480_REG(0x03, 0x36) +#define ADIS16480_REG_ZM_ALM_MAGN ADIS16480_REG(0x03, 0x38) +#define ADIS16480_REG_BR_ALM_MAGN ADIS16480_REG(0x03, 0x3A) +#define ADIS16480_REG_FIRM_REV ADIS16480_REG(0x03, 0x78) +#define ADIS16480_REG_FIRM_DM ADIS16480_REG(0x03, 0x7A) +#define ADIS16480_REG_FIRM_Y ADIS16480_REG(0x03, 0x7C) + +#define ADIS16480_REG_SERIAL_NUM ADIS16480_REG(0x04, 0x20) + +/* Each filter coefficent bank spans two pages */ +#define ADIS16480_FIR_COEF(page) (x < 60 ? ADIS16480_REG(page, (x) + 8) : \ + ADIS16480_REG((page) + 1, (x) - 60 + 8)) +#define ADIS16480_FIR_COEF_A(x) ADIS16480_FIR_COEF(0x05, (x)) +#define ADIS16480_FIR_COEF_B(x) ADIS16480_FIR_COEF(0x07, (x)) +#define ADIS16480_FIR_COEF_C(x) ADIS16480_FIR_COEF(0x09, (x)) +#define ADIS16480_FIR_COEF_D(x) ADIS16480_FIR_COEF(0x0B, (x)) + +struct adis16480_chip_info { + unsigned int num_channels; + const struct iio_chan_spec *channels; +}; + +struct adis16480 { + const struct adis16480_chip_info *chip_info; + + struct adis adis; +}; + +#ifdef CONFIG_DEBUG_FS + +static ssize_t adis16480_show_firmware_revision(struct file *file, + char __user *userbuf, size_t count, loff_t *ppos) +{ + struct adis16480 *adis16480 = file->private_data; + char buf[7]; + size_t len; + u16 rev; + int ret; + + ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_REV, &rev); + if (ret < 0) + return ret; + + len = scnprintf(buf, sizeof(buf), "%x.%x\n", rev >> 8, rev & 0xff); + + return simple_read_from_buffer(userbuf, count, ppos, buf, len); +} + +static const struct file_operations adis16480_firmware_revision_fops = { + .open = simple_open, + .read = adis16480_show_firmware_revision, + .llseek = default_llseek, + .owner = THIS_MODULE, +}; + +static ssize_t adis16480_show_firmware_date(struct file *file, + char __user *userbuf, size_t count, loff_t *ppos) +{ + struct adis16480 *adis16480 = file->private_data; + u16 md, year; + char buf[12]; + size_t len; + int ret; + + ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_Y, &year); + if (ret < 0) + return ret; + + ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_DM, &md); + if (ret < 0) + return ret; + + len = snprintf(buf, sizeof(buf), "%.2x-%.2x-%.4x\n", + md >> 8, md & 0xff, year); + + return simple_read_from_buffer(userbuf, count, ppos, buf, len); +} + +static const struct file_operations adis16480_firmware_date_fops = { + .open = simple_open, + .read = adis16480_show_firmware_date, + .llseek = default_llseek, + .owner = THIS_MODULE, +}; + +static int adis16480_show_serial_number(void *arg, u64 *val) +{ + struct adis16480 *adis16480 = arg; + u16 serial; + int ret; + + ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_SERIAL_NUM, + &serial); + if (ret < 0) + return ret; + + *val = serial; + + return 0; +} +DEFINE_SIMPLE_ATTRIBUTE(adis16480_serial_number_fops, + adis16480_show_serial_number, NULL, "0x%.4llx\n"); + +static int adis16480_show_product_id(void *arg, u64 *val) +{ + struct adis16480 *adis16480 = arg; + u16 prod_id; + int ret; + + ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_PROD_ID, + &prod_id); + if (ret < 0) + return ret; + + *val = prod_id; + + return 0; +} +DEFINE_SIMPLE_ATTRIBUTE(adis16480_product_id_fops, + adis16480_show_product_id, NULL, "%llu\n"); + +static int adis16480_show_flash_count(void *arg, u64 *val) +{ + struct adis16480 *adis16480 = arg; + u32 flash_count; + int ret; + + ret = adis_read_reg_32(&adis16480->adis, ADIS16480_REG_FLASH_CNT, + &flash_count); + if (ret < 0) + return ret; + + *val = flash_count; + + return 0; +} +DEFINE_SIMPLE_ATTRIBUTE(adis16480_flash_count_fops, + adis16480_show_flash_count, NULL, "%lld\n"); + +static int adis16480_debugfs_init(struct iio_dev *indio_dev) +{ + struct adis16480 *adis16480 = iio_priv(indio_dev); + + debugfs_create_file("firmware_revision", 0400, + indio_dev->debugfs_dentry, adis16480, + &adis16480_firmware_revision_fops); + debugfs_create_file("firmware_date", 0400, indio_dev->debugfs_dentry, + adis16480, &adis16480_firmware_date_fops); + debugfs_create_file("serial_number", 0400, indio_dev->debugfs_dentry, + adis16480, &adis16480_serial_number_fops); + debugfs_create_file("product_id", 0400, indio_dev->debugfs_dentry, + adis16480, &adis16480_product_id_fops); + debugfs_create_file("flash_count", 0400, indio_dev->debugfs_dentry, + adis16480, &adis16480_flash_count_fops); + + return 0; +} + +#else + +static int adis16480_debugfs_init(struct iio_dev *indio_dev) +{ + return 0; +} + +#endif + +static int adis16480_set_freq(struct adis16480 *st, unsigned int freq) +{ + unsigned int t; + + t = 2460000 / freq; + if (t > 2048) + t = 2048; + + if (t != 0) + t--; + + return adis_write_reg_16(&st->adis, ADIS16480_REG_DEC_RATE, t); +} + +static int adis16480_get_freq(struct adis16480 *st, unsigned int *freq) +{ + uint16_t t; + int ret; + + ret = adis_read_reg_16(&st->adis, ADIS16480_REG_DEC_RATE, &t); + if (ret < 0) + return ret; + + *freq = 2460000 / (t + 1); + + return 0; +} + +static ssize_t adis16480_read_frequency(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct adis16480 *st = iio_priv(indio_dev); + unsigned int freq; + int ret; + + ret = adis16480_get_freq(st, &freq); + if (ret < 0) + return ret; + + return sprintf(buf, "%d.%.3d\n", freq / 1000, freq % 1000); +} + +static ssize_t adis16480_write_frequency(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct adis16480 *st = iio_priv(indio_dev); + int freq_int, freq_fract; + long val; + int ret; + + ret = iio_str_to_fixpoint(buf, 100, &freq_int, &freq_fract); + if (ret) + return ret; + + val = freq_int * 1000 + freq_fract; + + if (val <= 0) + return -EINVAL; + + ret = adis16480_set_freq(st, val); + + return ret ? ret : len; +} + +static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, + adis16480_read_frequency, + adis16480_write_frequency); + +enum { + ADIS16480_SCAN_GYRO_X, + ADIS16480_SCAN_GYRO_Y, + ADIS16480_SCAN_GYRO_Z, + ADIS16480_SCAN_ACCEL_X, + ADIS16480_SCAN_ACCEL_Y, + ADIS16480_SCAN_ACCEL_Z, + ADIS16480_SCAN_MAGN_X, + ADIS16480_SCAN_MAGN_Y, + ADIS16480_SCAN_MAGN_Z, + ADIS16480_SCAN_BARO, + ADIS16480_SCAN_TEMP, +}; + +static const unsigned int adis16480_calibbias_regs[] = { + [ADIS16480_SCAN_GYRO_X] = ADIS16480_REG_X_GYRO_BIAS, + [ADIS16480_SCAN_GYRO_Y] = ADIS16480_REG_Y_GYRO_BIAS, + [ADIS16480_SCAN_GYRO_Z] = ADIS16480_REG_Z_GYRO_BIAS, + [ADIS16480_SCAN_ACCEL_X] = ADIS16480_REG_X_ACCEL_BIAS, + [ADIS16480_SCAN_ACCEL_Y] = ADIS16480_REG_Y_ACCEL_BIAS, + [ADIS16480_SCAN_ACCEL_Z] = ADIS16480_REG_Z_ACCEL_BIAS, + [ADIS16480_SCAN_MAGN_X] = ADIS16480_REG_X_HARD_IRON, + [ADIS16480_SCAN_MAGN_Y] = ADIS16480_REG_Y_HARD_IRON, + [ADIS16480_SCAN_MAGN_Z] = ADIS16480_REG_Z_HARD_IRON, + [ADIS16480_SCAN_BARO] = ADIS16480_REG_BAROM_BIAS, +}; + +static const unsigned int adis16480_calibscale_regs[] = { + [ADIS16480_SCAN_GYRO_X] = ADIS16480_REG_X_GYRO_SCALE, + [ADIS16480_SCAN_GYRO_Y] = ADIS16480_REG_Y_GYRO_SCALE, + [ADIS16480_SCAN_GYRO_Z] = ADIS16480_REG_Z_GYRO_SCALE, + [ADIS16480_SCAN_ACCEL_X] = ADIS16480_REG_X_ACCEL_SCALE, + [ADIS16480_SCAN_ACCEL_Y] = ADIS16480_REG_Y_ACCEL_SCALE, + [ADIS16480_SCAN_ACCEL_Z] = ADIS16480_REG_Z_ACCEL_SCALE, +}; + +static int adis16480_set_calibbias(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int bias) +{ + unsigned int reg = adis16480_calibbias_regs[chan->scan_index]; + struct adis16480 *st = iio_priv(indio_dev); + + switch (chan->type) { + case IIO_MAGN: + case IIO_PRESSURE: + if (bias < -0x8000 || bias >= 0x8000) + return -EINVAL; + return adis_write_reg_16(&st->adis, reg, bias); + case IIO_ANGL_VEL: + case IIO_ACCEL: + return adis_write_reg_32(&st->adis, reg, bias); + default: + break; + } + + return -EINVAL; +} + +static int adis16480_get_calibbias(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int *bias) +{ + unsigned int reg = adis16480_calibbias_regs[chan->scan_index]; + struct adis16480 *st = iio_priv(indio_dev); + uint16_t val16; + uint32_t val32; + int ret; + + switch (chan->type) { + case IIO_MAGN: + case IIO_PRESSURE: + ret = adis_read_reg_16(&st->adis, reg, &val16); + *bias = sign_extend32(val16, 15); + break; + case IIO_ANGL_VEL: + case IIO_ACCEL: + ret = adis_read_reg_32(&st->adis, reg, &val32); + *bias = sign_extend32(val32, 31); + break; + default: + ret = -EINVAL; + } + + if (ret < 0) + return ret; + + return IIO_VAL_INT; +} + +static int adis16480_set_calibscale(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int scale) +{ + unsigned int reg = adis16480_calibscale_regs[chan->scan_index]; + struct adis16480 *st = iio_priv(indio_dev); + + if (scale < -0x8000 || scale >= 0x8000) + return -EINVAL; + + return adis_write_reg_16(&st->adis, reg, scale); +} + +static int adis16480_get_calibscale(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int *scale) +{ + unsigned int reg = adis16480_calibscale_regs[chan->scan_index]; + struct adis16480 *st = iio_priv(indio_dev); + uint16_t val16; + int ret; + + ret = adis_read_reg_16(&st->adis, reg, &val16); + if (ret < 0) + return ret; + + *scale = sign_extend32(val16, 15); + return IIO_VAL_INT; +} + +static const unsigned int adis16480_def_filter_freqs[] = { + 310, + 55, + 275, + 63, +}; + +static const unsigned int ad16480_filter_data[][2] = { + [ADIS16480_SCAN_GYRO_X] = { ADIS16480_REG_FILTER_BNK0, 0 }, + [ADIS16480_SCAN_GYRO_Y] = { ADIS16480_REG_FILTER_BNK0, 3 }, + [ADIS16480_SCAN_GYRO_Z] = { ADIS16480_REG_FILTER_BNK0, 6 }, + [ADIS16480_SCAN_ACCEL_X] = { ADIS16480_REG_FILTER_BNK0, 9 }, + [ADIS16480_SCAN_ACCEL_Y] = { ADIS16480_REG_FILTER_BNK0, 12 }, + [ADIS16480_SCAN_ACCEL_Z] = { ADIS16480_REG_FILTER_BNK1, 0 }, + [ADIS16480_SCAN_MAGN_X] = { ADIS16480_REG_FILTER_BNK1, 3 }, + [ADIS16480_SCAN_MAGN_Y] = { ADIS16480_REG_FILTER_BNK1, 6 }, + [ADIS16480_SCAN_MAGN_Z] = { ADIS16480_REG_FILTER_BNK1, 9 }, +}; + +static int adis16480_get_filter_freq(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int *freq) +{ + struct adis16480 *st = iio_priv(indio_dev); + unsigned int enable_mask, offset, reg; + uint16_t val; + int ret; + + reg = ad16480_filter_data[chan->scan_index][0]; + offset = ad16480_filter_data[chan->scan_index][1]; + enable_mask = BIT(offset + 2); + + ret = adis_read_reg_16(&st->adis, reg, &val); + if (ret < 0) + return ret; + + if (!(val & enable_mask)) + *freq = 0; + else + *freq = adis16480_def_filter_freqs[(val >> offset) & 0x3]; + + return IIO_VAL_INT; +} + +static int adis16480_set_filter_freq(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, unsigned int freq) +{ + struct adis16480 *st = iio_priv(indio_dev); + unsigned int enable_mask, offset, reg; + unsigned int diff, best_diff; + unsigned int i, best_freq; + uint16_t val; + int ret; + + reg = ad16480_filter_data[chan->scan_index][0]; + offset = ad16480_filter_data[chan->scan_index][1]; + enable_mask = BIT(offset + 2); + + ret = adis_read_reg_16(&st->adis, reg, &val); + if (ret < 0) + return ret; + + if (freq == 0) { + val &= ~enable_mask; + } else { + best_freq = 0; + best_diff = 310; + for (i = 0; i < ARRAY_SIZE(adis16480_def_filter_freqs); i++) { + if (adis16480_def_filter_freqs[i] >= freq) { + diff = adis16480_def_filter_freqs[i] - freq; + if (diff < best_diff) { + best_diff = diff; + best_freq = i; + } + } + } + + val &= ~(0x3 << offset); + val |= best_freq << offset; + val |= enable_mask; + } + + return adis_write_reg_16(&st->adis, reg, val); +} + +static int adis16480_read_raw(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int *val, int *val2, long info) +{ + switch (info) { + case IIO_CHAN_INFO_RAW: + return adis_single_conversion(indio_dev, chan, 0, val); + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ANGL_VEL: + *val = 0; + *val2 = IIO_DEGREE_TO_RAD(20000); /* 0.02 degree/sec */ + return IIO_VAL_INT_PLUS_MICRO; + case IIO_ACCEL: + *val = 0; + *val2 = IIO_G_TO_M_S_2(800); /* 0.8 mg */ + return IIO_VAL_INT_PLUS_MICRO; + case IIO_MAGN: + *val = 0; + *val2 = 100; /* 0.0001 gauss */ + return IIO_VAL_INT_PLUS_MICRO; + case IIO_TEMP: + *val = 5; + *val2 = 650000; /* 5.65 milli degree Celsius */ + return IIO_VAL_INT_PLUS_MICRO; + case IIO_PRESSURE: + *val = 0; + *val2 = 4000; /* 40ubar = 0.004 kPa */ + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_OFFSET: + /* Only the temperature channel has a offset */ + *val = 4425; /* 25 degree Celsius = 0x0000 */ + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBBIAS: + return adis16480_get_calibbias(indio_dev, chan, val); + case IIO_CHAN_INFO_CALIBSCALE: + return adis16480_get_calibscale(indio_dev, chan, val); + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + return adis16480_get_filter_freq(indio_dev, chan, val); + default: + return -EINVAL; + } +} + +static int adis16480_write_raw(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int val, int val2, long info) +{ + switch (info) { + case IIO_CHAN_INFO_CALIBBIAS: + return adis16480_set_calibbias(indio_dev, chan, val); + case IIO_CHAN_INFO_CALIBSCALE: + return adis16480_set_calibscale(indio_dev, chan, val); + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + return adis16480_set_filter_freq(indio_dev, chan, val); + default: + return -EINVAL; + } +} + +#define ADIS16480_MOD_CHANNEL(_type, _mod, _address, _si, _info, _bits) \ + { \ + .type = (_type), \ + .modified = 1, \ + .channel2 = (_mod), \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT | \ + _info, \ + .address = (_address), \ + .scan_index = (_si), \ + .scan_type = { \ + .sign = 's', \ + .realbits = (_bits), \ + .storagebits = (_bits), \ + .endianness = IIO_BE, \ + }, \ + } + +#define ADIS16480_GYRO_CHANNEL(_mod) \ + ADIS16480_MOD_CHANNEL(IIO_ANGL_VEL, IIO_MOD_ ## _mod, \ + ADIS16480_REG_ ## _mod ## _GYRO_OUT, ADIS16480_SCAN_GYRO_ ## _mod, \ + IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, \ + 32) + +#define ADIS16480_ACCEL_CHANNEL(_mod) \ + ADIS16480_MOD_CHANNEL(IIO_ACCEL, IIO_MOD_ ## _mod, \ + ADIS16480_REG_ ## _mod ## _ACCEL_OUT, ADIS16480_SCAN_ACCEL_ ## _mod, \ + IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, \ + 32) + +#define ADIS16480_MAGN_CHANNEL(_mod) \ + ADIS16480_MOD_CHANNEL(IIO_MAGN, IIO_MOD_ ## _mod, \ + ADIS16480_REG_ ## _mod ## _MAGN_OUT, ADIS16480_SCAN_MAGN_ ## _mod, \ + IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SEPARATE_BIT, \ + 16) + +#define ADIS16480_PRESSURE_CHANNEL() \ + { \ + .type = IIO_PRESSURE, \ + .indexed = 1, \ + .channel = 0, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ + .address = ADIS16480_REG_BAROM_OUT, \ + .scan_index = ADIS16480_SCAN_BARO, \ + .scan_type = { \ + .sign = 's', \ + .realbits = 32, \ + .storagebits = 32, \ + .endianness = IIO_BE, \ + }, \ + } + +#define ADIS16480_TEMP_CHANNEL() { \ + .type = IIO_TEMP, \ + .indexed = 1, \ + .channel = 0, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \ + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT, \ + .address = ADIS16480_REG_TEMP_OUT, \ + .scan_index = ADIS16480_SCAN_TEMP, \ + .scan_type = { \ + .sign = 's', \ + .realbits = 16, \ + .storagebits = 16, \ + .endianness = IIO_BE, \ + }, \ + } + +static const struct iio_chan_spec adis16480_channels[] = { + ADIS16480_GYRO_CHANNEL(X), + ADIS16480_GYRO_CHANNEL(Y), + ADIS16480_GYRO_CHANNEL(Z), + ADIS16480_ACCEL_CHANNEL(X), + ADIS16480_ACCEL_CHANNEL(Y), + ADIS16480_ACCEL_CHANNEL(Z), + ADIS16480_MAGN_CHANNEL(X), + ADIS16480_MAGN_CHANNEL(Y), + ADIS16480_MAGN_CHANNEL(Z), + ADIS16480_PRESSURE_CHANNEL(), + ADIS16480_TEMP_CHANNEL(), + IIO_CHAN_SOFT_TIMESTAMP(11) +}; + +static const struct iio_chan_spec adis16485_channels[] = { + ADIS16480_GYRO_CHANNEL(X), + ADIS16480_GYRO_CHANNEL(Y), + ADIS16480_GYRO_CHANNEL(Z), + ADIS16480_ACCEL_CHANNEL(X), + ADIS16480_ACCEL_CHANNEL(Y), + ADIS16480_ACCEL_CHANNEL(Z), + ADIS16480_TEMP_CHANNEL(), + IIO_CHAN_SOFT_TIMESTAMP(7) +}; + +enum adis16480_variant { + ADIS16375, + ADIS16480, + ADIS16485, + ADIS16488, +}; + +static const struct adis16480_chip_info adis16480_chip_info[] = { + [ADIS16375] = { + .channels = adis16485_channels, + .num_channels = ARRAY_SIZE(adis16485_channels), + }, + [ADIS16480] = { + .channels = adis16480_channels, + .num_channels = ARRAY_SIZE(adis16480_channels), + }, + [ADIS16485] = { + .channels = adis16485_channels, + .num_channels = ARRAY_SIZE(adis16485_channels), + }, + [ADIS16488] = { + .channels = adis16480_channels, + .num_channels = ARRAY_SIZE(adis16480_channels), + }, +}; + +static struct attribute *adis16480_attributes[] = { + &iio_dev_attr_sampling_frequency.dev_attr.attr, + NULL +}; + +static const struct attribute_group adis16480_attribute_group = { + .attrs = adis16480_attributes, +}; + +static const struct iio_info adis16480_info = { + .attrs = &adis16480_attribute_group, + .read_raw = &adis16480_read_raw, + .write_raw = &adis16480_write_raw, + .update_scan_mode = adis_update_scan_mode, + .driver_module = THIS_MODULE, +}; + +static int adis16480_stop_device(struct iio_dev *indio_dev) +{ + struct adis16480 *st = iio_priv(indio_dev); + int ret; + + ret = adis_write_reg_16(&st->adis, ADIS16480_REG_SLP_CNT, BIT(9)); + if (ret) + dev_err(&indio_dev->dev, + "Could not power down device: %d\n", ret); + + return ret; +} + +static int adis16480_enable_irq(struct adis *adis, bool enable) +{ + return adis_write_reg_16(adis, ADIS16480_REG_FNCTIO_CTRL, + enable ? BIT(3) : 0); +} + +static int adis16480_initial_setup(struct iio_dev *indio_dev) +{ + struct adis16480 *st = iio_priv(indio_dev); + uint16_t prod_id; + unsigned int device_id; + int ret; + + adis_reset(&st->adis); + msleep(70); + + ret = adis_write_reg_16(&st->adis, ADIS16480_REG_GLOB_CMD, BIT(1)); + if (ret) + return ret; + msleep(30); + + ret = adis_check_status(&st->adis); + if (ret) + return ret; + + ret = adis_read_reg_16(&st->adis, ADIS16480_REG_PROD_ID, &prod_id); + if (ret) + return ret; + + sscanf(indio_dev->name, "adis%u\n", &device_id); + + if (prod_id != device_id) + dev_warn(&indio_dev->dev, "Device ID(%u) and product ID(%u) do not match.", + device_id, prod_id); + + return 0; +} + +#define ADIS16480_DIAG_STAT_XGYRO_FAIL 0 +#define ADIS16480_DIAG_STAT_YGYRO_FAIL 1 +#define ADIS16480_DIAG_STAT_ZGYRO_FAIL 2 +#define ADIS16480_DIAG_STAT_XACCL_FAIL 3 +#define ADIS16480_DIAG_STAT_YACCL_FAIL 4 +#define ADIS16480_DIAG_STAT_ZACCL_FAIL 5 +#define ADIS16480_DIAG_STAT_XMAGN_FAIL 8 +#define ADIS16480_DIAG_STAT_YMAGN_FAIL 9 +#define ADIS16480_DIAG_STAT_ZMAGN_FAIL 10 +#define ADIS16480_DIAG_STAT_BARO_FAIL 11 + +static const char * const adis16480_status_error_msgs[] = { + [ADIS16480_DIAG_STAT_XGYRO_FAIL] = "X-axis gyroscope self-test failure", + [ADIS16480_DIAG_STAT_YGYRO_FAIL] = "Y-axis gyroscope self-test failure", + [ADIS16480_DIAG_STAT_ZGYRO_FAIL] = "Z-axis gyroscope self-test failure", + [ADIS16480_DIAG_STAT_XACCL_FAIL] = "X-axis accelerometer self-test failure", + [ADIS16480_DIAG_STAT_YACCL_FAIL] = "Y-axis accelerometer self-test failure", + [ADIS16480_DIAG_STAT_ZACCL_FAIL] = "Z-axis accelerometer self-test failure", + [ADIS16480_DIAG_STAT_XMAGN_FAIL] = "X-axis magnetometer self-test failure", + [ADIS16480_DIAG_STAT_YMAGN_FAIL] = "Y-axis magnetometer self-test failure", + [ADIS16480_DIAG_STAT_ZMAGN_FAIL] = "Z-axis magnetometer self-test failure", + [ADIS16480_DIAG_STAT_BARO_FAIL] = "Barometer self-test failure", +}; + +static const struct adis_data adis16480_data = { + .diag_stat_reg = ADIS16480_REG_DIAG_STS, + .glob_cmd_reg = ADIS16480_REG_GLOB_CMD, + .has_paging = true, + + .read_delay = 5, + .write_delay = 5, + + .status_error_msgs = adis16480_status_error_msgs, + .status_error_mask = BIT(ADIS16480_DIAG_STAT_XGYRO_FAIL) | + BIT(ADIS16480_DIAG_STAT_YGYRO_FAIL) | + BIT(ADIS16480_DIAG_STAT_ZGYRO_FAIL) | + BIT(ADIS16480_DIAG_STAT_XACCL_FAIL) | + BIT(ADIS16480_DIAG_STAT_YACCL_FAIL) | + BIT(ADIS16480_DIAG_STAT_ZACCL_FAIL) | + BIT(ADIS16480_DIAG_STAT_XMAGN_FAIL) | + BIT(ADIS16480_DIAG_STAT_YMAGN_FAIL) | + BIT(ADIS16480_DIAG_STAT_ZMAGN_FAIL) | + BIT(ADIS16480_DIAG_STAT_BARO_FAIL), + + .enable_irq = adis16480_enable_irq, +}; + +static int adis16480_probe(struct spi_device *spi) +{ + const struct spi_device_id *id = spi_get_device_id(spi); + struct iio_dev *indio_dev; + struct adis16480 *st; + int ret; + + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) + return -ENOMEM; + + spi_set_drvdata(spi, indio_dev); + + st = iio_priv(indio_dev); + + st->chip_info = &adis16480_chip_info[id->driver_data]; + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->channels = st->chip_info->channels; + indio_dev->num_channels = st->chip_info->num_channels; + indio_dev->info = &adis16480_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = adis_init(&st->adis, indio_dev, spi, &adis16480_data); + if (ret) + goto error_free_dev; + + ret = adis_setup_buffer_and_trigger(&st->adis, indio_dev, NULL); + if (ret) + goto error_free_dev; + + ret = adis16480_initial_setup(indio_dev); + if (ret) + goto error_cleanup_buffer; + + ret = iio_device_register(indio_dev); + if (ret) + goto error_stop_device; + + adis16480_debugfs_init(indio_dev); + + return 0; + +error_stop_device: + adis16480_stop_device(indio_dev); +error_cleanup_buffer: + adis_cleanup_buffer_and_trigger(&st->adis, indio_dev); +error_free_dev: + iio_device_free(indio_dev); + return ret; +} + +static int adis16480_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct adis16480 *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + adis16480_stop_device(indio_dev); + + adis_cleanup_buffer_and_trigger(&st->adis, indio_dev); + + iio_device_free(indio_dev); + + return 0; +} + +static const struct spi_device_id adis16480_ids[] = { + { "adis16375", ADIS16375 }, + { "adis16480", ADIS16480 }, + { "adis16485", ADIS16485 }, + { "adis16488", ADIS16488 }, + { } +}; +MODULE_DEVICE_TABLE(spi, adis16480_ids); + +static struct spi_driver adis16480_driver = { + .driver = { + .name = "adis16480", + .owner = THIS_MODULE, + }, + .id_table = adis16480_ids, + .probe = adis16480_probe, + .remove = adis16480_remove, +}; +module_spi_driver(adis16480_driver); + +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("Analog Devices ADIS16480 IMU driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/imu/adis_buffer.c b/drivers/iio/imu/adis_buffer.c new file mode 100644 index 000000000000..99d8e0b0dd34 --- /dev/null +++ b/drivers/iio/imu/adis_buffer.c @@ -0,0 +1,176 @@ +/* + * Common library for ADIS16XXX devices + * + * Copyright 2012 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/export.h> +#include <linux/interrupt.h> +#include <linux/mutex.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/slab.h> + +#include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/imu/adis.h> + +int adis_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *scan_mask) +{ + struct adis *adis = iio_device_get_drvdata(indio_dev); + const struct iio_chan_spec *chan; + unsigned int scan_count; + unsigned int i, j; + __be16 *tx, *rx; + + kfree(adis->xfer); + kfree(adis->buffer); + + scan_count = indio_dev->scan_bytes / 2; + + adis->xfer = kcalloc(scan_count + 1, sizeof(*adis->xfer), GFP_KERNEL); + if (!adis->xfer) + return -ENOMEM; + + adis->buffer = kzalloc(indio_dev->scan_bytes * 2, GFP_KERNEL); + if (!adis->buffer) + return -ENOMEM; + + rx = adis->buffer; + tx = rx + indio_dev->scan_bytes; + + spi_message_init(&adis->msg); + + for (j = 0; j <= scan_count; j++) { + adis->xfer[j].bits_per_word = 8; + if (j != scan_count) + adis->xfer[j].cs_change = 1; + adis->xfer[j].len = 2; + adis->xfer[j].delay_usecs = adis->data->read_delay; + if (j < scan_count) + adis->xfer[j].tx_buf = &tx[j]; + if (j >= 1) + adis->xfer[j].rx_buf = &rx[j - 1]; + spi_message_add_tail(&adis->xfer[j], &adis->msg); + } + + chan = indio_dev->channels; + for (i = 0; i < indio_dev->num_channels; i++, chan++) { + if (!test_bit(chan->scan_index, scan_mask)) + continue; + if (chan->scan_type.storagebits == 32) + *tx++ = cpu_to_be16((chan->address + 2) << 8); + *tx++ = cpu_to_be16(chan->address << 8); + } + + return 0; +} +EXPORT_SYMBOL_GPL(adis_update_scan_mode); + +static irqreturn_t adis_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct adis *adis = iio_device_get_drvdata(indio_dev); + int ret; + + if (!adis->buffer) + return -ENOMEM; + + if (adis->data->has_paging) { + mutex_lock(&adis->txrx_lock); + if (adis->current_page != 0) { + adis->tx[0] = ADIS_WRITE_REG(ADIS_REG_PAGE_ID); + adis->tx[1] = 0; + spi_write(adis->spi, adis->tx, 2); + } + } + + ret = spi_sync(adis->spi, &adis->msg); + if (ret) + dev_err(&adis->spi->dev, "Failed to read data: %d", ret); + + + if (adis->data->has_paging) { + adis->current_page = 0; + mutex_unlock(&adis->txrx_lock); + } + + /* Guaranteed to be aligned with 8 byte boundary */ + if (indio_dev->scan_timestamp) { + void *b = adis->buffer + indio_dev->scan_bytes - sizeof(s64); + *(s64 *)b = pf->timestamp; + } + + iio_push_to_buffers(indio_dev, adis->buffer); + + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +/** + * adis_setup_buffer_and_trigger() - Sets up buffer and trigger for the adis device + * @adis: The adis device. + * @indio_dev: The IIO device. + * @trigger_handler: Optional trigger handler, may be NULL. + * + * Returns 0 on success, a negative error code otherwise. + * + * This function sets up the buffer and trigger for a adis devices. If + * 'trigger_handler' is NULL the default trigger handler will be used. The + * default trigger handler will simply read the registers assigned to the + * currently active channels. + * + * adis_cleanup_buffer_and_trigger() should be called to free the resources + * allocated by this function. + */ +int adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev, + irqreturn_t (*trigger_handler)(int, void *)) +{ + int ret; + + if (!trigger_handler) + trigger_handler = adis_trigger_handler; + + ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + trigger_handler, NULL); + if (ret) + return ret; + + if (adis->spi->irq) { + ret = adis_probe_trigger(adis, indio_dev); + if (ret) + goto error_buffer_cleanup; + } + return 0; + +error_buffer_cleanup: + iio_triggered_buffer_cleanup(indio_dev); + return ret; +} +EXPORT_SYMBOL_GPL(adis_setup_buffer_and_trigger); + +/** + * adis_cleanup_buffer_and_trigger() - Free buffer and trigger resources + * @adis: The adis device. + * @indio_dev: The IIO device. + * + * Frees resources allocated by adis_setup_buffer_and_trigger() + */ +void adis_cleanup_buffer_and_trigger(struct adis *adis, + struct iio_dev *indio_dev) +{ + if (adis->spi->irq) + adis_remove_trigger(adis); + kfree(adis->buffer); + kfree(adis->xfer); + iio_triggered_buffer_cleanup(indio_dev); +} +EXPORT_SYMBOL_GPL(adis_cleanup_buffer_and_trigger); diff --git a/drivers/iio/imu/adis_trigger.c b/drivers/iio/imu/adis_trigger.c new file mode 100644 index 000000000000..5a24c9cac343 --- /dev/null +++ b/drivers/iio/imu/adis_trigger.c @@ -0,0 +1,89 @@ +/* + * Common library for ADIS16XXX devices + * + * Copyright 2012 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/export.h> + +#include <linux/iio/iio.h> +#include <linux/iio/trigger.h> +#include <linux/iio/imu/adis.h> + +static int adis_data_rdy_trigger_set_state(struct iio_trigger *trig, + bool state) +{ + struct adis *adis = trig->private_data; + + return adis_enable_irq(adis, state); +} + +static const struct iio_trigger_ops adis_trigger_ops = { + .owner = THIS_MODULE, + .set_trigger_state = &adis_data_rdy_trigger_set_state, +}; + +/** + * adis_probe_trigger() - Sets up trigger for a adis device + * @adis: The adis device + * @indio_dev: The IIO device + * + * Returns 0 on success or a negative error code + * + * adis_remove_trigger() should be used to free the trigger. + */ +int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev) +{ + int ret; + + adis->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name, + indio_dev->id); + if (adis->trig == NULL) + return -ENOMEM; + + ret = request_irq(adis->spi->irq, + &iio_trigger_generic_data_rdy_poll, + IRQF_TRIGGER_RISING, + indio_dev->name, + adis->trig); + if (ret) + goto error_free_trig; + + adis->trig->dev.parent = &adis->spi->dev; + adis->trig->ops = &adis_trigger_ops; + adis->trig->private_data = adis; + ret = iio_trigger_register(adis->trig); + + indio_dev->trig = adis->trig; + if (ret) + goto error_free_irq; + + return 0; + +error_free_irq: + free_irq(adis->spi->irq, adis->trig); +error_free_trig: + iio_trigger_free(adis->trig); + return ret; +} +EXPORT_SYMBOL_GPL(adis_probe_trigger); + +/** + * adis_remove_trigger() - Remove trigger for a adis devices + * @adis: The adis device + * + * Removes the trigger previously registered with adis_probe_trigger(). + */ +void adis_remove_trigger(struct adis *adis) +{ + iio_trigger_unregister(adis->trig); + free_irq(adis->spi->irq, adis->trig); + iio_trigger_free(adis->trig); +} +EXPORT_SYMBOL_GPL(adis_remove_trigger); diff --git a/drivers/iio/imu/inv_mpu6050/Kconfig b/drivers/iio/imu/inv_mpu6050/Kconfig new file mode 100644 index 000000000000..361b2328453d --- /dev/null +++ b/drivers/iio/imu/inv_mpu6050/Kconfig @@ -0,0 +1,14 @@ +# +# inv-mpu6050 drivers for Invensense MPU devices and combos +# + +config INV_MPU6050_IIO + tristate "Invensense MPU6050 devices" + depends on I2C && SYSFS + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + This driver supports the Invensense MPU6050 devices. + It is a gyroscope/accelerometer combo device. + This driver can be built as a module. The module will be called + inv-mpu6050. diff --git a/drivers/iio/imu/inv_mpu6050/Makefile b/drivers/iio/imu/inv_mpu6050/Makefile new file mode 100644 index 000000000000..3a677c778afb --- /dev/null +++ b/drivers/iio/imu/inv_mpu6050/Makefile @@ -0,0 +1,6 @@ +# +# Makefile for Invensense MPU6050 device. +# + +obj-$(CONFIG_INV_MPU6050_IIO) += inv-mpu6050.o +inv-mpu6050-objs := inv_mpu_core.o inv_mpu_ring.o inv_mpu_trigger.o diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c new file mode 100644 index 000000000000..37ca05b47e4b --- /dev/null +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c @@ -0,0 +1,795 @@ +/* +* Copyright (C) 2012 Invensense, Inc. +* +* This software is licensed under the terms of the GNU General Public +* License version 2, as published by the Free Software Foundation, and +* may be copied, distributed, and modified under those terms. +* +* This program is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +*/ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/err.h> +#include <linux/delay.h> +#include <linux/sysfs.h> +#include <linux/jiffies.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/kfifo.h> +#include <linux/spinlock.h> +#include "inv_mpu_iio.h" + +/* + * this is the gyro scale translated from dynamic range plus/minus + * {250, 500, 1000, 2000} to rad/s + */ +static const int gyro_scale_6050[] = {133090, 266181, 532362, 1064724}; + +/* + * this is the accel scale translated from dynamic range plus/minus + * {2, 4, 8, 16} to m/s^2 + */ +static const int accel_scale[] = {598, 1196, 2392, 4785}; + +static const struct inv_mpu6050_reg_map reg_set_6050 = { + .sample_rate_div = INV_MPU6050_REG_SAMPLE_RATE_DIV, + .lpf = INV_MPU6050_REG_CONFIG, + .user_ctrl = INV_MPU6050_REG_USER_CTRL, + .fifo_en = INV_MPU6050_REG_FIFO_EN, + .gyro_config = INV_MPU6050_REG_GYRO_CONFIG, + .accl_config = INV_MPU6050_REG_ACCEL_CONFIG, + .fifo_count_h = INV_MPU6050_REG_FIFO_COUNT_H, + .fifo_r_w = INV_MPU6050_REG_FIFO_R_W, + .raw_gyro = INV_MPU6050_REG_RAW_GYRO, + .raw_accl = INV_MPU6050_REG_RAW_ACCEL, + .temperature = INV_MPU6050_REG_TEMPERATURE, + .int_enable = INV_MPU6050_REG_INT_ENABLE, + .pwr_mgmt_1 = INV_MPU6050_REG_PWR_MGMT_1, + .pwr_mgmt_2 = INV_MPU6050_REG_PWR_MGMT_2, +}; + +static const struct inv_mpu6050_chip_config chip_config_6050 = { + .fsr = INV_MPU6050_FSR_2000DPS, + .lpf = INV_MPU6050_FILTER_20HZ, + .fifo_rate = INV_MPU6050_INIT_FIFO_RATE, + .gyro_fifo_enable = false, + .accl_fifo_enable = false, + .accl_fs = INV_MPU6050_FS_02G, +}; + +static const struct inv_mpu6050_hw hw_info[INV_NUM_PARTS] = { + { + .num_reg = 117, + .name = "MPU6050", + .reg = ®_set_6050, + .config = &chip_config_6050, + }, +}; + +int inv_mpu6050_write_reg(struct inv_mpu6050_state *st, int reg, u8 d) +{ + return i2c_smbus_write_i2c_block_data(st->client, reg, 1, &d); +} + +int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask) +{ + u8 d, mgmt_1; + int result; + + /* switch clock needs to be careful. Only when gyro is on, can + clock source be switched to gyro. Otherwise, it must be set to + internal clock */ + if (INV_MPU6050_BIT_PWR_GYRO_STBY == mask) { + result = i2c_smbus_read_i2c_block_data(st->client, + st->reg->pwr_mgmt_1, 1, &mgmt_1); + if (result != 1) + return result; + + mgmt_1 &= ~INV_MPU6050_BIT_CLK_MASK; + } + + if ((INV_MPU6050_BIT_PWR_GYRO_STBY == mask) && (!en)) { + /* turning off gyro requires switch to internal clock first. + Then turn off gyro engine */ + mgmt_1 |= INV_CLK_INTERNAL; + result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1, mgmt_1); + if (result) + return result; + } + + result = i2c_smbus_read_i2c_block_data(st->client, + st->reg->pwr_mgmt_2, 1, &d); + if (result != 1) + return result; + if (en) + d &= ~mask; + else + d |= mask; + result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_2, d); + if (result) + return result; + + if (en) { + /* Wait for output stablize */ + msleep(INV_MPU6050_TEMP_UP_TIME); + if (INV_MPU6050_BIT_PWR_GYRO_STBY == mask) { + /* switch internal clock to PLL */ + mgmt_1 |= INV_CLK_PLL; + result = inv_mpu6050_write_reg(st, + st->reg->pwr_mgmt_1, mgmt_1); + if (result) + return result; + } + } + + return 0; +} + +int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on) +{ + int result; + + if (power_on) + result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1, 0); + else + result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1, + INV_MPU6050_BIT_SLEEP); + if (result) + return result; + + if (power_on) + msleep(INV_MPU6050_REG_UP_TIME); + + return 0; +} + +/** + * inv_mpu6050_init_config() - Initialize hardware, disable FIFO. + * + * Initial configuration: + * FSR: ± 2000DPS + * DLPF: 20Hz + * FIFO rate: 50Hz + * Clock source: Gyro PLL + */ +static int inv_mpu6050_init_config(struct iio_dev *indio_dev) +{ + int result; + u8 d; + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + result = inv_mpu6050_set_power_itg(st, true); + if (result) + return result; + d = (INV_MPU6050_FSR_2000DPS << INV_MPU6050_GYRO_CONFIG_FSR_SHIFT); + result = inv_mpu6050_write_reg(st, st->reg->gyro_config, d); + if (result) + return result; + + d = INV_MPU6050_FILTER_20HZ; + result = inv_mpu6050_write_reg(st, st->reg->lpf, d); + if (result) + return result; + + d = INV_MPU6050_ONE_K_HZ / INV_MPU6050_INIT_FIFO_RATE - 1; + result = inv_mpu6050_write_reg(st, st->reg->sample_rate_div, d); + if (result) + return result; + + d = (INV_MPU6050_FS_02G << INV_MPU6050_ACCL_CONFIG_FSR_SHIFT); + result = inv_mpu6050_write_reg(st, st->reg->accl_config, d); + if (result) + return result; + + memcpy(&st->chip_config, hw_info[st->chip_type].config, + sizeof(struct inv_mpu6050_chip_config)); + result = inv_mpu6050_set_power_itg(st, false); + + return result; +} + +static int inv_mpu6050_sensor_show(struct inv_mpu6050_state *st, int reg, + int axis, int *val) +{ + int ind, result; + __be16 d; + + ind = (axis - IIO_MOD_X) * 2; + result = i2c_smbus_read_i2c_block_data(st->client, reg + ind, 2, + (u8 *)&d); + if (result != 2) + return -EINVAL; + *val = (short)be16_to_cpup(&d); + + return IIO_VAL_INT; +} + +static int inv_mpu6050_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long mask) { + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + { + int ret, result; + + ret = IIO_VAL_INT; + result = 0; + mutex_lock(&indio_dev->mlock); + if (!st->chip_config.enable) { + result = inv_mpu6050_set_power_itg(st, true); + if (result) + goto error_read_raw; + } + /* when enable is on, power is already on */ + switch (chan->type) { + case IIO_ANGL_VEL: + if (!st->chip_config.gyro_fifo_enable || + !st->chip_config.enable) { + result = inv_mpu6050_switch_engine(st, true, + INV_MPU6050_BIT_PWR_GYRO_STBY); + if (result) + goto error_read_raw; + } + ret = inv_mpu6050_sensor_show(st, st->reg->raw_gyro, + chan->channel2, val); + if (!st->chip_config.gyro_fifo_enable || + !st->chip_config.enable) { + result = inv_mpu6050_switch_engine(st, false, + INV_MPU6050_BIT_PWR_GYRO_STBY); + if (result) + goto error_read_raw; + } + break; + case IIO_ACCEL: + if (!st->chip_config.accl_fifo_enable || + !st->chip_config.enable) { + result = inv_mpu6050_switch_engine(st, true, + INV_MPU6050_BIT_PWR_ACCL_STBY); + if (result) + goto error_read_raw; + } + ret = inv_mpu6050_sensor_show(st, st->reg->raw_accl, + chan->channel2, val); + if (!st->chip_config.accl_fifo_enable || + !st->chip_config.enable) { + result = inv_mpu6050_switch_engine(st, false, + INV_MPU6050_BIT_PWR_ACCL_STBY); + if (result) + goto error_read_raw; + } + break; + case IIO_TEMP: + /* wait for stablization */ + msleep(INV_MPU6050_SENSOR_UP_TIME); + inv_mpu6050_sensor_show(st, st->reg->temperature, + IIO_MOD_X, val); + break; + default: + ret = -EINVAL; + break; + } +error_read_raw: + if (!st->chip_config.enable) + result |= inv_mpu6050_set_power_itg(st, false); + mutex_unlock(&indio_dev->mlock); + if (result) + return result; + + return ret; + } + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ANGL_VEL: + *val = 0; + *val2 = gyro_scale_6050[st->chip_config.fsr]; + + return IIO_VAL_INT_PLUS_NANO; + case IIO_ACCEL: + *val = 0; + *val2 = accel_scale[st->chip_config.accl_fs]; + + return IIO_VAL_INT_PLUS_MICRO; + case IIO_TEMP: + *val = 0; + *val2 = INV_MPU6050_TEMP_SCALE; + + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_OFFSET: + switch (chan->type) { + case IIO_TEMP: + *val = INV_MPU6050_TEMP_OFFSET; + + return IIO_VAL_INT; + default: + return -EINVAL; + } + default: + return -EINVAL; + } +} + +static int inv_mpu6050_write_fsr(struct inv_mpu6050_state *st, int fsr) +{ + int result; + u8 d; + + if (fsr < 0 || fsr > INV_MPU6050_MAX_GYRO_FS_PARAM) + return -EINVAL; + if (fsr == st->chip_config.fsr) + return 0; + + d = (fsr << INV_MPU6050_GYRO_CONFIG_FSR_SHIFT); + result = inv_mpu6050_write_reg(st, st->reg->gyro_config, d); + if (result) + return result; + st->chip_config.fsr = fsr; + + return 0; +} + +static int inv_mpu6050_write_accel_fs(struct inv_mpu6050_state *st, int fs) +{ + int result; + u8 d; + + if (fs < 0 || fs > INV_MPU6050_MAX_ACCL_FS_PARAM) + return -EINVAL; + if (fs == st->chip_config.accl_fs) + return 0; + + d = (fs << INV_MPU6050_ACCL_CONFIG_FSR_SHIFT); + result = inv_mpu6050_write_reg(st, st->reg->accl_config, d); + if (result) + return result; + st->chip_config.accl_fs = fs; + + return 0; +} + +static int inv_mpu6050_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) { + struct inv_mpu6050_state *st = iio_priv(indio_dev); + int result; + + mutex_lock(&indio_dev->mlock); + /* we should only update scale when the chip is disabled, i.e., + not running */ + if (st->chip_config.enable) { + result = -EBUSY; + goto error_write_raw; + } + result = inv_mpu6050_set_power_itg(st, true); + if (result) + goto error_write_raw; + + switch (mask) { + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ANGL_VEL: + result = inv_mpu6050_write_fsr(st, val); + break; + case IIO_ACCEL: + result = inv_mpu6050_write_accel_fs(st, val); + break; + default: + result = -EINVAL; + break; + } + break; + default: + result = -EINVAL; + break; + } + +error_write_raw: + result |= inv_mpu6050_set_power_itg(st, false); + mutex_unlock(&indio_dev->mlock); + + return result; +} + +/** + * inv_mpu6050_set_lpf() - set low pass filer based on fifo rate. + * + * Based on the Nyquist principle, the sampling rate must + * exceed twice of the bandwidth of the signal, or there + * would be alising. This function basically search for the + * correct low pass parameters based on the fifo rate, e.g, + * sampling frequency. + */ +static int inv_mpu6050_set_lpf(struct inv_mpu6050_state *st, int rate) +{ + const int hz[] = {188, 98, 42, 20, 10, 5}; + const int d[] = {INV_MPU6050_FILTER_188HZ, INV_MPU6050_FILTER_98HZ, + INV_MPU6050_FILTER_42HZ, INV_MPU6050_FILTER_20HZ, + INV_MPU6050_FILTER_10HZ, INV_MPU6050_FILTER_5HZ}; + int i, h, result; + u8 data; + + h = (rate >> 1); + i = 0; + while ((h < hz[i]) && (i < ARRAY_SIZE(d) - 1)) + i++; + data = d[i]; + result = inv_mpu6050_write_reg(st, st->reg->lpf, data); + if (result) + return result; + st->chip_config.lpf = data; + + return 0; +} + +/** + * inv_mpu6050_fifo_rate_store() - Set fifo rate. + */ +static ssize_t inv_mpu6050_fifo_rate_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + s32 fifo_rate; + u8 d; + int result; + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + if (kstrtoint(buf, 10, &fifo_rate)) + return -EINVAL; + if (fifo_rate < INV_MPU6050_MIN_FIFO_RATE || + fifo_rate > INV_MPU6050_MAX_FIFO_RATE) + return -EINVAL; + if (fifo_rate == st->chip_config.fifo_rate) + return count; + + mutex_lock(&indio_dev->mlock); + if (st->chip_config.enable) { + result = -EBUSY; + goto fifo_rate_fail; + } + result = inv_mpu6050_set_power_itg(st, true); + if (result) + goto fifo_rate_fail; + + d = INV_MPU6050_ONE_K_HZ / fifo_rate - 1; + result = inv_mpu6050_write_reg(st, st->reg->sample_rate_div, d); + if (result) + goto fifo_rate_fail; + st->chip_config.fifo_rate = fifo_rate; + + result = inv_mpu6050_set_lpf(st, fifo_rate); + if (result) + goto fifo_rate_fail; + +fifo_rate_fail: + result |= inv_mpu6050_set_power_itg(st, false); + mutex_unlock(&indio_dev->mlock); + if (result) + return result; + + return count; +} + +/** + * inv_fifo_rate_show() - Get the current sampling rate. + */ +static ssize_t inv_fifo_rate_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct inv_mpu6050_state *st = iio_priv(dev_to_iio_dev(dev)); + + return sprintf(buf, "%d\n", st->chip_config.fifo_rate); +} + +/** + * inv_attr_show() - calling this function will show current + * parameters. + */ +static ssize_t inv_attr_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct inv_mpu6050_state *st = iio_priv(dev_to_iio_dev(dev)); + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); + s8 *m; + + switch (this_attr->address) { + /* In MPU6050, the two matrix are the same because gyro and accel + are integrated in one chip */ + case ATTR_GYRO_MATRIX: + case ATTR_ACCL_MATRIX: + m = st->plat_data.orientation; + + return sprintf(buf, "%d, %d, %d; %d, %d, %d; %d, %d, %d\n", + m[0], m[1], m[2], m[3], m[4], m[5], m[6], m[7], m[8]); + default: + return -EINVAL; + } +} + +/** + * inv_mpu6050_validate_trigger() - validate_trigger callback for invensense + * MPU6050 device. + * @indio_dev: The IIO device + * @trig: The new trigger + * + * Returns: 0 if the 'trig' matches the trigger registered by the MPU6050 + * device, -EINVAL otherwise. + */ +static int inv_mpu6050_validate_trigger(struct iio_dev *indio_dev, + struct iio_trigger *trig) +{ + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + if (st->trig != trig) + return -EINVAL; + + return 0; +} + +#define INV_MPU6050_CHAN(_type, _channel2, _index) \ + { \ + .type = _type, \ + .modified = 1, \ + .channel2 = _channel2, \ + .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT \ + | IIO_CHAN_INFO_RAW_SEPARATE_BIT, \ + .scan_index = _index, \ + .scan_type = { \ + .sign = 's', \ + .realbits = 16, \ + .storagebits = 16, \ + .shift = 0 , \ + .endianness = IIO_BE, \ + }, \ + } + +static const struct iio_chan_spec inv_mpu_channels[] = { + IIO_CHAN_SOFT_TIMESTAMP(INV_MPU6050_SCAN_TIMESTAMP), + /* + * Note that temperature should only be via polled reading only, + * not the final scan elements output. + */ + { + .type = IIO_TEMP, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT + | IIO_CHAN_INFO_OFFSET_SEPARATE_BIT + | IIO_CHAN_INFO_SCALE_SEPARATE_BIT, + .scan_index = -1, + }, + INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_X, INV_MPU6050_SCAN_GYRO_X), + INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Y, INV_MPU6050_SCAN_GYRO_Y), + INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Z, INV_MPU6050_SCAN_GYRO_Z), + + INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_X, INV_MPU6050_SCAN_ACCL_X), + INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Y, INV_MPU6050_SCAN_ACCL_Y), + INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Z, INV_MPU6050_SCAN_ACCL_Z), +}; + +/* constant IIO attribute */ +static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("10 20 50 100 200 500"); +static IIO_DEV_ATTR_SAMP_FREQ(S_IRUGO | S_IWUSR, inv_fifo_rate_show, + inv_mpu6050_fifo_rate_store); +static IIO_DEVICE_ATTR(in_gyro_matrix, S_IRUGO, inv_attr_show, NULL, + ATTR_GYRO_MATRIX); +static IIO_DEVICE_ATTR(in_accel_matrix, S_IRUGO, inv_attr_show, NULL, + ATTR_ACCL_MATRIX); + +static struct attribute *inv_attributes[] = { + &iio_dev_attr_in_gyro_matrix.dev_attr.attr, + &iio_dev_attr_in_accel_matrix.dev_attr.attr, + &iio_dev_attr_sampling_frequency.dev_attr.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + NULL, +}; + +static const struct attribute_group inv_attribute_group = { + .attrs = inv_attributes +}; + +static const struct iio_info mpu_info = { + .driver_module = THIS_MODULE, + .read_raw = &inv_mpu6050_read_raw, + .write_raw = &inv_mpu6050_write_raw, + .attrs = &inv_attribute_group, + .validate_trigger = inv_mpu6050_validate_trigger, +}; + +/** + * inv_check_and_setup_chip() - check and setup chip. + */ +static int inv_check_and_setup_chip(struct inv_mpu6050_state *st, + const struct i2c_device_id *id) +{ + int result; + + st->chip_type = INV_MPU6050; + st->hw = &hw_info[st->chip_type]; + st->reg = hw_info[st->chip_type].reg; + + /* reset to make sure previous state are not there */ + result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1, + INV_MPU6050_BIT_H_RESET); + if (result) + return result; + msleep(INV_MPU6050_POWER_UP_TIME); + /* toggle power state. After reset, the sleep bit could be on + or off depending on the OTP settings. Toggling power would + make it in a definite state as well as making the hardware + state align with the software state */ + result = inv_mpu6050_set_power_itg(st, false); + if (result) + return result; + result = inv_mpu6050_set_power_itg(st, true); + if (result) + return result; + + result = inv_mpu6050_switch_engine(st, false, + INV_MPU6050_BIT_PWR_ACCL_STBY); + if (result) + return result; + result = inv_mpu6050_switch_engine(st, false, + INV_MPU6050_BIT_PWR_GYRO_STBY); + if (result) + return result; + + return 0; +} + +/** + * inv_mpu_probe() - probe function. + * @client: i2c client. + * @id: i2c device id. + * + * Returns 0 on success, a negative error code otherwise. + */ +static int inv_mpu_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct inv_mpu6050_state *st; + struct iio_dev *indio_dev; + int result; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_I2C_BLOCK | + I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)) { + result = -ENOSYS; + goto out_no_free; + } + indio_dev = iio_device_alloc(sizeof(*st)); + if (indio_dev == NULL) { + result = -ENOMEM; + goto out_no_free; + } + st = iio_priv(indio_dev); + st->client = client; + st->plat_data = *(struct inv_mpu6050_platform_data + *)dev_get_platdata(&client->dev); + /* power is turned on inside check chip type*/ + result = inv_check_and_setup_chip(st, id); + if (result) + goto out_free; + + result = inv_mpu6050_init_config(indio_dev); + if (result) { + dev_err(&client->dev, + "Could not initialize device.\n"); + goto out_free; + } + + i2c_set_clientdata(client, indio_dev); + indio_dev->dev.parent = &client->dev; + indio_dev->name = id->name; + indio_dev->channels = inv_mpu_channels; + indio_dev->num_channels = ARRAY_SIZE(inv_mpu_channels); + + indio_dev->info = &mpu_info; + indio_dev->modes = INDIO_BUFFER_TRIGGERED; + + result = iio_triggered_buffer_setup(indio_dev, + inv_mpu6050_irq_handler, + inv_mpu6050_read_fifo, + NULL); + if (result) { + dev_err(&st->client->dev, "configure buffer fail %d\n", + result); + goto out_free; + } + result = inv_mpu6050_probe_trigger(indio_dev); + if (result) { + dev_err(&st->client->dev, "trigger probe fail %d\n", result); + goto out_unreg_ring; + } + + INIT_KFIFO(st->timestamps); + spin_lock_init(&st->time_stamp_lock); + result = iio_device_register(indio_dev); + if (result) { + dev_err(&st->client->dev, "IIO register fail %d\n", result); + goto out_remove_trigger; + } + + return 0; + +out_remove_trigger: + inv_mpu6050_remove_trigger(st); +out_unreg_ring: + iio_triggered_buffer_cleanup(indio_dev); +out_free: + iio_device_free(indio_dev); +out_no_free: + + return result; +} + +static int inv_mpu_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + inv_mpu6050_remove_trigger(st); + iio_triggered_buffer_cleanup(indio_dev); + iio_device_free(indio_dev); + + return 0; +} +#ifdef CONFIG_PM_SLEEP + +static int inv_mpu_resume(struct device *dev) +{ + return inv_mpu6050_set_power_itg( + iio_priv(i2c_get_clientdata(to_i2c_client(dev))), true); +} + +static int inv_mpu_suspend(struct device *dev) +{ + return inv_mpu6050_set_power_itg( + iio_priv(i2c_get_clientdata(to_i2c_client(dev))), false); +} +static SIMPLE_DEV_PM_OPS(inv_mpu_pmops, inv_mpu_suspend, inv_mpu_resume); + +#define INV_MPU6050_PMOPS (&inv_mpu_pmops) +#else +#define INV_MPU6050_PMOPS NULL +#endif /* CONFIG_PM_SLEEP */ + +/* + * device id table is used to identify what device can be + * supported by this driver + */ +static const struct i2c_device_id inv_mpu_id[] = { + {"mpu6050", INV_MPU6050}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, inv_mpu_id); + +static struct i2c_driver inv_mpu_driver = { + .probe = inv_mpu_probe, + .remove = inv_mpu_remove, + .id_table = inv_mpu_id, + .driver = { + .owner = THIS_MODULE, + .name = "inv-mpu6050", + .pm = INV_MPU6050_PMOPS, + }, +}; + +module_i2c_driver(inv_mpu_driver); + +MODULE_AUTHOR("Invensense Corporation"); +MODULE_DESCRIPTION("Invensense device MPU6050 driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h new file mode 100644 index 000000000000..f38395529a44 --- /dev/null +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h @@ -0,0 +1,246 @@ +/* +* Copyright (C) 2012 Invensense, Inc. +* +* This software is licensed under the terms of the GNU General Public +* License version 2, as published by the Free Software Foundation, and +* may be copied, distributed, and modified under those terms. +* +* This program is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +*/ +#include <linux/i2c.h> +#include <linux/kfifo.h> +#include <linux/spinlock.h> +#include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/kfifo_buf.h> +#include <linux/iio/trigger.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/platform_data/invensense_mpu6050.h> + +/** + * struct inv_mpu6050_reg_map - Notable registers. + * @sample_rate_div: Divider applied to gyro output rate. + * @lpf: Configures internal low pass filter. + * @user_ctrl: Enables/resets the FIFO. + * @fifo_en: Determines which data will appear in FIFO. + * @gyro_config: gyro config register. + * @accl_config: accel config register + * @fifo_count_h: Upper byte of FIFO count. + * @fifo_r_w: FIFO register. + * @raw_gyro: Address of first gyro register. + * @raw_accl: Address of first accel register. + * @temperature: temperature register + * @int_enable: Interrupt enable register. + * @pwr_mgmt_1: Controls chip's power state and clock source. + * @pwr_mgmt_2: Controls power state of individual sensors. + */ +struct inv_mpu6050_reg_map { + u8 sample_rate_div; + u8 lpf; + u8 user_ctrl; + u8 fifo_en; + u8 gyro_config; + u8 accl_config; + u8 fifo_count_h; + u8 fifo_r_w; + u8 raw_gyro; + u8 raw_accl; + u8 temperature; + u8 int_enable; + u8 pwr_mgmt_1; + u8 pwr_mgmt_2; +}; + +/*device enum */ +enum inv_devices { + INV_MPU6050, + INV_NUM_PARTS +}; + +/** + * struct inv_mpu6050_chip_config - Cached chip configuration data. + * @fsr: Full scale range. + * @lpf: Digital low pass filter frequency. + * @accl_fs: accel full scale range. + * @enable: master enable state. + * @accl_fifo_enable: enable accel data output + * @gyro_fifo_enable: enable gyro data output + * @fifo_rate: FIFO update rate. + */ +struct inv_mpu6050_chip_config { + unsigned int fsr:2; + unsigned int lpf:3; + unsigned int accl_fs:2; + unsigned int enable:1; + unsigned int accl_fifo_enable:1; + unsigned int gyro_fifo_enable:1; + u16 fifo_rate; +}; + +/** + * struct inv_mpu6050_hw - Other important hardware information. + * @num_reg: Number of registers on device. + * @name: name of the chip. + * @reg: register map of the chip. + * @config: configuration of the chip. + */ +struct inv_mpu6050_hw { + u8 num_reg; + u8 *name; + const struct inv_mpu6050_reg_map *reg; + const struct inv_mpu6050_chip_config *config; +}; + +/* + * struct inv_mpu6050_state - Driver state variables. + * @TIMESTAMP_FIFO_SIZE: fifo size for timestamp. + * @trig: IIO trigger. + * @chip_config: Cached attribute information. + * @reg: Map of important registers. + * @hw: Other hardware-specific information. + * @chip_type: chip type. + * @time_stamp_lock: spin lock to time stamp. + * @client: i2c client handle. + * @plat_data: platform data. + * @timestamps: kfifo queue to store time stamp. + */ +struct inv_mpu6050_state { +#define TIMESTAMP_FIFO_SIZE 16 + struct iio_trigger *trig; + struct inv_mpu6050_chip_config chip_config; + const struct inv_mpu6050_reg_map *reg; + const struct inv_mpu6050_hw *hw; + enum inv_devices chip_type; + spinlock_t time_stamp_lock; + struct i2c_client *client; + struct inv_mpu6050_platform_data plat_data; + DECLARE_KFIFO(timestamps, long long, TIMESTAMP_FIFO_SIZE); +}; + +/*register and associated bit definition*/ +#define INV_MPU6050_REG_SAMPLE_RATE_DIV 0x19 +#define INV_MPU6050_REG_CONFIG 0x1A +#define INV_MPU6050_REG_GYRO_CONFIG 0x1B +#define INV_MPU6050_REG_ACCEL_CONFIG 0x1C + +#define INV_MPU6050_REG_FIFO_EN 0x23 +#define INV_MPU6050_BIT_ACCEL_OUT 0x08 +#define INV_MPU6050_BITS_GYRO_OUT 0x70 + +#define INV_MPU6050_REG_INT_ENABLE 0x38 +#define INV_MPU6050_BIT_DATA_RDY_EN 0x01 +#define INV_MPU6050_BIT_DMP_INT_EN 0x02 + +#define INV_MPU6050_REG_RAW_ACCEL 0x3B +#define INV_MPU6050_REG_TEMPERATURE 0x41 +#define INV_MPU6050_REG_RAW_GYRO 0x43 + +#define INV_MPU6050_REG_USER_CTRL 0x6A +#define INV_MPU6050_BIT_FIFO_RST 0x04 +#define INV_MPU6050_BIT_DMP_RST 0x08 +#define INV_MPU6050_BIT_I2C_MST_EN 0x20 +#define INV_MPU6050_BIT_FIFO_EN 0x40 +#define INV_MPU6050_BIT_DMP_EN 0x80 + +#define INV_MPU6050_REG_PWR_MGMT_1 0x6B +#define INV_MPU6050_BIT_H_RESET 0x80 +#define INV_MPU6050_BIT_SLEEP 0x40 +#define INV_MPU6050_BIT_CLK_MASK 0x7 + +#define INV_MPU6050_REG_PWR_MGMT_2 0x6C +#define INV_MPU6050_BIT_PWR_ACCL_STBY 0x38 +#define INV_MPU6050_BIT_PWR_GYRO_STBY 0x07 + +#define INV_MPU6050_REG_FIFO_COUNT_H 0x72 +#define INV_MPU6050_REG_FIFO_R_W 0x74 + +#define INV_MPU6050_BYTES_PER_3AXIS_SENSOR 6 +#define INV_MPU6050_FIFO_COUNT_BYTE 2 +#define INV_MPU6050_FIFO_THRESHOLD 500 +#define INV_MPU6050_POWER_UP_TIME 100 +#define INV_MPU6050_TEMP_UP_TIME 100 +#define INV_MPU6050_SENSOR_UP_TIME 30 +#define INV_MPU6050_REG_UP_TIME 5 + +#define INV_MPU6050_TEMP_OFFSET 12421 +#define INV_MPU6050_TEMP_SCALE 2941 +#define INV_MPU6050_MAX_GYRO_FS_PARAM 3 +#define INV_MPU6050_MAX_ACCL_FS_PARAM 3 +#define INV_MPU6050_THREE_AXIS 3 +#define INV_MPU6050_GYRO_CONFIG_FSR_SHIFT 3 +#define INV_MPU6050_ACCL_CONFIG_FSR_SHIFT 3 + +/* 6 + 6 round up and plus 8 */ +#define INV_MPU6050_OUTPUT_DATA_SIZE 24 + +/* init parameters */ +#define INV_MPU6050_INIT_FIFO_RATE 50 +#define INV_MPU6050_TIME_STAMP_TOR 5 +#define INV_MPU6050_MAX_FIFO_RATE 1000 +#define INV_MPU6050_MIN_FIFO_RATE 4 +#define INV_MPU6050_ONE_K_HZ 1000 + +/* scan element definition */ +enum inv_mpu6050_scan { + INV_MPU6050_SCAN_ACCL_X, + INV_MPU6050_SCAN_ACCL_Y, + INV_MPU6050_SCAN_ACCL_Z, + INV_MPU6050_SCAN_GYRO_X, + INV_MPU6050_SCAN_GYRO_Y, + INV_MPU6050_SCAN_GYRO_Z, + INV_MPU6050_SCAN_TIMESTAMP, +}; + +enum inv_mpu6050_filter_e { + INV_MPU6050_FILTER_256HZ_NOLPF2 = 0, + INV_MPU6050_FILTER_188HZ, + INV_MPU6050_FILTER_98HZ, + INV_MPU6050_FILTER_42HZ, + INV_MPU6050_FILTER_20HZ, + INV_MPU6050_FILTER_10HZ, + INV_MPU6050_FILTER_5HZ, + INV_MPU6050_FILTER_2100HZ_NOLPF, + NUM_MPU6050_FILTER +}; + +/* IIO attribute address */ +enum INV_MPU6050_IIO_ATTR_ADDR { + ATTR_GYRO_MATRIX, + ATTR_ACCL_MATRIX, +}; + +enum inv_mpu6050_accl_fs_e { + INV_MPU6050_FS_02G = 0, + INV_MPU6050_FS_04G, + INV_MPU6050_FS_08G, + INV_MPU6050_FS_16G, + NUM_ACCL_FSR +}; + +enum inv_mpu6050_fsr_e { + INV_MPU6050_FSR_250DPS = 0, + INV_MPU6050_FSR_500DPS, + INV_MPU6050_FSR_1000DPS, + INV_MPU6050_FSR_2000DPS, + NUM_MPU6050_FSR +}; + +enum inv_mpu6050_clock_sel_e { + INV_CLK_INTERNAL = 0, + INV_CLK_PLL, + NUM_CLK +}; + +irqreturn_t inv_mpu6050_irq_handler(int irq, void *p); +irqreturn_t inv_mpu6050_read_fifo(int irq, void *p); +int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev); +void inv_mpu6050_remove_trigger(struct inv_mpu6050_state *st); +int inv_reset_fifo(struct iio_dev *indio_dev); +int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask); +int inv_mpu6050_write_reg(struct inv_mpu6050_state *st, int reg, u8 val); +int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on); diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c new file mode 100644 index 000000000000..331781ffbb15 --- /dev/null +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c @@ -0,0 +1,196 @@ +/* +* Copyright (C) 2012 Invensense, Inc. +* +* This software is licensed under the terms of the GNU General Public +* License version 2, as published by the Free Software Foundation, and +* may be copied, distributed, and modified under those terms. +* +* This program is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +*/ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/err.h> +#include <linux/delay.h> +#include <linux/sysfs.h> +#include <linux/jiffies.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/kfifo.h> +#include <linux/poll.h> +#include "inv_mpu_iio.h" + +int inv_reset_fifo(struct iio_dev *indio_dev) +{ + int result; + u8 d; + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + /* disable interrupt */ + result = inv_mpu6050_write_reg(st, st->reg->int_enable, 0); + if (result) { + dev_err(&st->client->dev, "int_enable failed %d\n", result); + return result; + } + /* disable the sensor output to FIFO */ + result = inv_mpu6050_write_reg(st, st->reg->fifo_en, 0); + if (result) + goto reset_fifo_fail; + /* disable fifo reading */ + result = inv_mpu6050_write_reg(st, st->reg->user_ctrl, 0); + if (result) + goto reset_fifo_fail; + + /* reset FIFO*/ + result = inv_mpu6050_write_reg(st, st->reg->user_ctrl, + INV_MPU6050_BIT_FIFO_RST); + if (result) + goto reset_fifo_fail; + /* enable interrupt */ + if (st->chip_config.accl_fifo_enable || + st->chip_config.gyro_fifo_enable) { + result = inv_mpu6050_write_reg(st, st->reg->int_enable, + INV_MPU6050_BIT_DATA_RDY_EN); + if (result) + return result; + } + /* enable FIFO reading and I2C master interface*/ + result = inv_mpu6050_write_reg(st, st->reg->user_ctrl, + INV_MPU6050_BIT_FIFO_EN); + if (result) + goto reset_fifo_fail; + /* enable sensor output to FIFO */ + d = 0; + if (st->chip_config.gyro_fifo_enable) + d |= INV_MPU6050_BITS_GYRO_OUT; + if (st->chip_config.accl_fifo_enable) + d |= INV_MPU6050_BIT_ACCEL_OUT; + result = inv_mpu6050_write_reg(st, st->reg->fifo_en, d); + if (result) + goto reset_fifo_fail; + + return 0; + +reset_fifo_fail: + dev_err(&st->client->dev, "reset fifo failed %d\n", result); + result = inv_mpu6050_write_reg(st, st->reg->int_enable, + INV_MPU6050_BIT_DATA_RDY_EN); + + return result; +} + +static void inv_clear_kfifo(struct inv_mpu6050_state *st) +{ + unsigned long flags; + + /* take the spin lock sem to avoid interrupt kick in */ + spin_lock_irqsave(&st->time_stamp_lock, flags); + kfifo_reset(&st->timestamps); + spin_unlock_irqrestore(&st->time_stamp_lock, flags); +} + +/** + * inv_mpu6050_irq_handler() - Cache a timestamp at each data ready interrupt. + */ +irqreturn_t inv_mpu6050_irq_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct inv_mpu6050_state *st = iio_priv(indio_dev); + s64 timestamp; + + timestamp = iio_get_time_ns(); + spin_lock(&st->time_stamp_lock); + kfifo_in(&st->timestamps, ×tamp, 1); + spin_unlock(&st->time_stamp_lock); + + return IRQ_WAKE_THREAD; +} + +/** + * inv_mpu6050_read_fifo() - Transfer data from hardware FIFO to KFIFO. + */ +irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct inv_mpu6050_state *st = iio_priv(indio_dev); + size_t bytes_per_datum; + int result; + u8 data[INV_MPU6050_OUTPUT_DATA_SIZE]; + u16 fifo_count; + s64 timestamp; + u64 *tmp; + + mutex_lock(&indio_dev->mlock); + if (!(st->chip_config.accl_fifo_enable | + st->chip_config.gyro_fifo_enable)) + goto end_session; + bytes_per_datum = 0; + if (st->chip_config.accl_fifo_enable) + bytes_per_datum += INV_MPU6050_BYTES_PER_3AXIS_SENSOR; + + if (st->chip_config.gyro_fifo_enable) + bytes_per_datum += INV_MPU6050_BYTES_PER_3AXIS_SENSOR; + + /* + * read fifo_count register to know how many bytes inside FIFO + * right now + */ + result = i2c_smbus_read_i2c_block_data(st->client, + st->reg->fifo_count_h, + INV_MPU6050_FIFO_COUNT_BYTE, data); + if (result != INV_MPU6050_FIFO_COUNT_BYTE) + goto end_session; + fifo_count = be16_to_cpup((__be16 *)(&data[0])); + if (fifo_count < bytes_per_datum) + goto end_session; + /* fifo count can't be odd number, if it is odd, reset fifo*/ + if (fifo_count & 1) + goto flush_fifo; + if (fifo_count > INV_MPU6050_FIFO_THRESHOLD) + goto flush_fifo; + /* Timestamp mismatch. */ + if (kfifo_len(&st->timestamps) > + fifo_count / bytes_per_datum + INV_MPU6050_TIME_STAMP_TOR) + goto flush_fifo; + while (fifo_count >= bytes_per_datum) { + result = i2c_smbus_read_i2c_block_data(st->client, + st->reg->fifo_r_w, + bytes_per_datum, data); + if (result != bytes_per_datum) + goto flush_fifo; + + result = kfifo_out(&st->timestamps, ×tamp, 1); + /* when there is no timestamp, put timestamp as 0 */ + if (0 == result) + timestamp = 0; + + tmp = (u64 *)data; + tmp[DIV_ROUND_UP(bytes_per_datum, 8)] = timestamp; + result = iio_push_to_buffers(indio_dev, data); + if (result) + goto flush_fifo; + fifo_count -= bytes_per_datum; + } + +end_session: + mutex_unlock(&indio_dev->mlock); + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; + +flush_fifo: + /* Flush HW and SW FIFOs. */ + inv_reset_fifo(indio_dev); + inv_clear_kfifo(st); + mutex_unlock(&indio_dev->mlock); + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c new file mode 100644 index 000000000000..e1d0869e0ad1 --- /dev/null +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c @@ -0,0 +1,155 @@ +/* +* Copyright (C) 2012 Invensense, Inc. +* +* This software is licensed under the terms of the GNU General Public +* License version 2, as published by the Free Software Foundation, and +* may be copied, distributed, and modified under those terms. +* +* This program is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +*/ + +#include "inv_mpu_iio.h" + +static void inv_scan_query(struct iio_dev *indio_dev) +{ + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + st->chip_config.gyro_fifo_enable = + test_bit(INV_MPU6050_SCAN_GYRO_X, + indio_dev->active_scan_mask) || + test_bit(INV_MPU6050_SCAN_GYRO_Y, + indio_dev->active_scan_mask) || + test_bit(INV_MPU6050_SCAN_GYRO_Z, + indio_dev->active_scan_mask); + + st->chip_config.accl_fifo_enable = + test_bit(INV_MPU6050_SCAN_ACCL_X, + indio_dev->active_scan_mask) || + test_bit(INV_MPU6050_SCAN_ACCL_Y, + indio_dev->active_scan_mask) || + test_bit(INV_MPU6050_SCAN_ACCL_Z, + indio_dev->active_scan_mask); +} + +/** + * inv_mpu6050_set_enable() - enable chip functions. + * @indio_dev: Device driver instance. + * @enable: enable/disable + */ +static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable) +{ + struct inv_mpu6050_state *st = iio_priv(indio_dev); + int result; + + if (enable) { + result = inv_mpu6050_set_power_itg(st, true); + if (result) + return result; + inv_scan_query(indio_dev); + if (st->chip_config.gyro_fifo_enable) { + result = inv_mpu6050_switch_engine(st, true, + INV_MPU6050_BIT_PWR_GYRO_STBY); + if (result) + return result; + } + if (st->chip_config.accl_fifo_enable) { + result = inv_mpu6050_switch_engine(st, true, + INV_MPU6050_BIT_PWR_ACCL_STBY); + if (result) + return result; + } + result = inv_reset_fifo(indio_dev); + if (result) + return result; + } else { + result = inv_mpu6050_write_reg(st, st->reg->fifo_en, 0); + if (result) + return result; + + result = inv_mpu6050_write_reg(st, st->reg->int_enable, 0); + if (result) + return result; + + result = inv_mpu6050_write_reg(st, st->reg->user_ctrl, 0); + if (result) + return result; + + result = inv_mpu6050_switch_engine(st, false, + INV_MPU6050_BIT_PWR_GYRO_STBY); + if (result) + return result; + + result = inv_mpu6050_switch_engine(st, false, + INV_MPU6050_BIT_PWR_ACCL_STBY); + if (result) + return result; + result = inv_mpu6050_set_power_itg(st, false); + if (result) + return result; + } + st->chip_config.enable = enable; + + return 0; +} + +/** + * inv_mpu_data_rdy_trigger_set_state() - set data ready interrupt state + * @trig: Trigger instance + * @state: Desired trigger state + */ +static int inv_mpu_data_rdy_trigger_set_state(struct iio_trigger *trig, + bool state) +{ + return inv_mpu6050_set_enable(trig->private_data, state); +} + +static const struct iio_trigger_ops inv_mpu_trigger_ops = { + .owner = THIS_MODULE, + .set_trigger_state = &inv_mpu_data_rdy_trigger_set_state, +}; + +int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev) +{ + int ret; + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + st->trig = iio_trigger_alloc("%s-dev%d", + indio_dev->name, + indio_dev->id); + if (st->trig == NULL) { + ret = -ENOMEM; + goto error_ret; + } + ret = request_irq(st->client->irq, &iio_trigger_generic_data_rdy_poll, + IRQF_TRIGGER_RISING, + "inv_mpu", + st->trig); + if (ret) + goto error_free_trig; + st->trig->dev.parent = &st->client->dev; + st->trig->private_data = indio_dev; + st->trig->ops = &inv_mpu_trigger_ops; + ret = iio_trigger_register(st->trig); + if (ret) + goto error_free_irq; + indio_dev->trig = st->trig; + + return 0; + +error_free_irq: + free_irq(st->client->irq, st->trig); +error_free_trig: + iio_trigger_free(st->trig); +error_ret: + return ret; +} + +void inv_mpu6050_remove_trigger(struct inv_mpu6050_state *st) +{ + iio_trigger_unregister(st->trig); + free_irq(st->client->irq, st->trig); + iio_trigger_free(st->trig); +} diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index d4ad37455a67..aaadd32f9f0d 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -31,6 +31,18 @@ static const char * const iio_endian_prefix[] = { [IIO_LE] = "le", }; +static bool iio_buffer_is_active(struct iio_dev *indio_dev, + struct iio_buffer *buf) +{ + struct list_head *p; + + list_for_each(p, &indio_dev->buffer_list) + if (p == &buf->buffer_list) + return true; + + return false; +} + /** * iio_buffer_read_first_n_outer() - chrdev read for buffer access * @@ -134,7 +146,7 @@ static ssize_t iio_scan_el_store(struct device *dev, if (ret < 0) return ret; mutex_lock(&indio_dev->mlock); - if (iio_buffer_enabled(indio_dev)) { + if (iio_buffer_is_active(indio_dev, indio_dev->buffer)) { ret = -EBUSY; goto error_ret; } @@ -180,12 +192,11 @@ static ssize_t iio_scan_el_ts_store(struct device *dev, return ret; mutex_lock(&indio_dev->mlock); - if (iio_buffer_enabled(indio_dev)) { + if (iio_buffer_is_active(indio_dev, indio_dev->buffer)) { ret = -EBUSY; goto error_ret; } indio_dev->buffer->scan_timestamp = state; - indio_dev->scan_timestamp = state; error_ret: mutex_unlock(&indio_dev->mlock); @@ -371,12 +382,12 @@ ssize_t iio_buffer_write_length(struct device *dev, const char *buf, size_t len) { - int ret; - ulong val; struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct iio_buffer *buffer = indio_dev->buffer; + unsigned int val; + int ret; - ret = strict_strtoul(buf, 10, &val); + ret = kstrtouint(buf, 10, &val); if (ret) return ret; @@ -385,7 +396,7 @@ ssize_t iio_buffer_write_length(struct device *dev, return len; mutex_lock(&indio_dev->mlock); - if (iio_buffer_enabled(indio_dev)) { + if (iio_buffer_is_active(indio_dev, indio_dev->buffer)) { ret = -EBUSY; } else { if (buffer->access->set_length) @@ -398,102 +409,14 @@ ssize_t iio_buffer_write_length(struct device *dev, } EXPORT_SYMBOL(iio_buffer_write_length); -ssize_t iio_buffer_store_enable(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - int ret; - bool requested_state, current_state; - int previous_mode; - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct iio_buffer *buffer = indio_dev->buffer; - - mutex_lock(&indio_dev->mlock); - previous_mode = indio_dev->currentmode; - requested_state = !(buf[0] == '0'); - current_state = iio_buffer_enabled(indio_dev); - if (current_state == requested_state) { - printk(KERN_INFO "iio-buffer, current state requested again\n"); - goto done; - } - if (requested_state) { - if (indio_dev->setup_ops->preenable) { - ret = indio_dev->setup_ops->preenable(indio_dev); - if (ret) { - printk(KERN_ERR - "Buffer not started: " - "buffer preenable failed\n"); - goto error_ret; - } - } - if (buffer->access->request_update) { - ret = buffer->access->request_update(buffer); - if (ret) { - printk(KERN_INFO - "Buffer not started: " - "buffer parameter update failed\n"); - goto error_ret; - } - } - /* Definitely possible for devices to support both of these. */ - if (indio_dev->modes & INDIO_BUFFER_TRIGGERED) { - if (!indio_dev->trig) { - printk(KERN_INFO - "Buffer not started: no trigger\n"); - ret = -EINVAL; - goto error_ret; - } - indio_dev->currentmode = INDIO_BUFFER_TRIGGERED; - } else if (indio_dev->modes & INDIO_BUFFER_HARDWARE) - indio_dev->currentmode = INDIO_BUFFER_HARDWARE; - else { /* should never be reached */ - ret = -EINVAL; - goto error_ret; - } - - if (indio_dev->setup_ops->postenable) { - ret = indio_dev->setup_ops->postenable(indio_dev); - if (ret) { - printk(KERN_INFO - "Buffer not started: " - "postenable failed\n"); - indio_dev->currentmode = previous_mode; - if (indio_dev->setup_ops->postdisable) - indio_dev->setup_ops-> - postdisable(indio_dev); - goto error_ret; - } - } - } else { - if (indio_dev->setup_ops->predisable) { - ret = indio_dev->setup_ops->predisable(indio_dev); - if (ret) - goto error_ret; - } - indio_dev->currentmode = INDIO_DIRECT_MODE; - if (indio_dev->setup_ops->postdisable) { - ret = indio_dev->setup_ops->postdisable(indio_dev); - if (ret) - goto error_ret; - } - } -done: - mutex_unlock(&indio_dev->mlock); - return len; - -error_ret: - mutex_unlock(&indio_dev->mlock); - return ret; -} -EXPORT_SYMBOL(iio_buffer_store_enable); - ssize_t iio_buffer_show_enable(struct device *dev, struct device_attribute *attr, char *buf) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); - return sprintf(buf, "%d\n", iio_buffer_enabled(indio_dev)); + return sprintf(buf, "%d\n", + iio_buffer_is_active(indio_dev, + indio_dev->buffer)); } EXPORT_SYMBOL(iio_buffer_show_enable); @@ -537,35 +460,220 @@ static int iio_compute_scan_bytes(struct iio_dev *indio_dev, const long *mask, return bytes; } -int iio_sw_buffer_preenable(struct iio_dev *indio_dev) +int iio_update_buffers(struct iio_dev *indio_dev, + struct iio_buffer *insert_buffer, + struct iio_buffer *remove_buffer) { - struct iio_buffer *buffer = indio_dev->buffer; - dev_dbg(&indio_dev->dev, "%s\n", __func__); + int ret; + int success = 0; + struct iio_buffer *buffer; + unsigned long *compound_mask; + const unsigned long *old_mask; - /* How much space will the demuxed element take? */ - indio_dev->scan_bytes = - iio_compute_scan_bytes(indio_dev, buffer->scan_mask, - buffer->scan_timestamp); - buffer->access->set_bytes_per_datum(buffer, indio_dev->scan_bytes); + /* Wind down existing buffers - iff there are any */ + if (!list_empty(&indio_dev->buffer_list)) { + if (indio_dev->setup_ops->predisable) { + ret = indio_dev->setup_ops->predisable(indio_dev); + if (ret) + goto error_ret; + } + indio_dev->currentmode = INDIO_DIRECT_MODE; + if (indio_dev->setup_ops->postdisable) { + ret = indio_dev->setup_ops->postdisable(indio_dev); + if (ret) + goto error_ret; + } + } + /* Keep a copy of current setup to allow roll back */ + old_mask = indio_dev->active_scan_mask; + if (!indio_dev->available_scan_masks) + indio_dev->active_scan_mask = NULL; + + if (remove_buffer) + list_del(&remove_buffer->buffer_list); + if (insert_buffer) + list_add(&insert_buffer->buffer_list, &indio_dev->buffer_list); + + /* If no buffers in list, we are done */ + if (list_empty(&indio_dev->buffer_list)) { + indio_dev->currentmode = INDIO_DIRECT_MODE; + if (indio_dev->available_scan_masks == NULL) + kfree(old_mask); + return 0; + } /* What scan mask do we actually have ?*/ - if (indio_dev->available_scan_masks) + compound_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength), + sizeof(long), GFP_KERNEL); + if (compound_mask == NULL) { + if (indio_dev->available_scan_masks == NULL) + kfree(old_mask); + return -ENOMEM; + } + indio_dev->scan_timestamp = 0; + + list_for_each_entry(buffer, &indio_dev->buffer_list, buffer_list) { + bitmap_or(compound_mask, compound_mask, buffer->scan_mask, + indio_dev->masklength); + indio_dev->scan_timestamp |= buffer->scan_timestamp; + } + if (indio_dev->available_scan_masks) { indio_dev->active_scan_mask = iio_scan_mask_match(indio_dev->available_scan_masks, indio_dev->masklength, - buffer->scan_mask); - else - indio_dev->active_scan_mask = buffer->scan_mask; - - if (indio_dev->active_scan_mask == NULL) - return -EINVAL; + compound_mask); + if (indio_dev->active_scan_mask == NULL) { + /* + * Roll back. + * Note can only occur when adding a buffer. + */ + list_del(&insert_buffer->buffer_list); + indio_dev->active_scan_mask = old_mask; + success = -EINVAL; + } + } else { + indio_dev->active_scan_mask = compound_mask; + } iio_update_demux(indio_dev); - if (indio_dev->info->update_scan_mode) - return indio_dev->info + /* Wind up again */ + if (indio_dev->setup_ops->preenable) { + ret = indio_dev->setup_ops->preenable(indio_dev); + if (ret) { + printk(KERN_ERR + "Buffer not started:" + "buffer preenable failed\n"); + goto error_remove_inserted; + } + } + indio_dev->scan_bytes = + iio_compute_scan_bytes(indio_dev, + indio_dev->active_scan_mask, + indio_dev->scan_timestamp); + list_for_each_entry(buffer, &indio_dev->buffer_list, buffer_list) + if (buffer->access->request_update) { + ret = buffer->access->request_update(buffer); + if (ret) { + printk(KERN_INFO + "Buffer not started:" + "buffer parameter update failed\n"); + goto error_run_postdisable; + } + } + if (indio_dev->info->update_scan_mode) { + ret = indio_dev->info ->update_scan_mode(indio_dev, indio_dev->active_scan_mask); + if (ret < 0) { + printk(KERN_INFO "update scan mode failed\n"); + goto error_run_postdisable; + } + } + /* Definitely possible for devices to support both of these.*/ + if (indio_dev->modes & INDIO_BUFFER_TRIGGERED) { + if (!indio_dev->trig) { + printk(KERN_INFO "Buffer not started: no trigger\n"); + ret = -EINVAL; + /* Can only occur on first buffer */ + goto error_run_postdisable; + } + indio_dev->currentmode = INDIO_BUFFER_TRIGGERED; + } else if (indio_dev->modes & INDIO_BUFFER_HARDWARE) { + indio_dev->currentmode = INDIO_BUFFER_HARDWARE; + } else { /* should never be reached */ + ret = -EINVAL; + goto error_run_postdisable; + } + + if (indio_dev->setup_ops->postenable) { + ret = indio_dev->setup_ops->postenable(indio_dev); + if (ret) { + printk(KERN_INFO + "Buffer not started: postenable failed\n"); + indio_dev->currentmode = INDIO_DIRECT_MODE; + if (indio_dev->setup_ops->postdisable) + indio_dev->setup_ops->postdisable(indio_dev); + goto error_disable_all_buffers; + } + } + + if (indio_dev->available_scan_masks) + kfree(compound_mask); + else + kfree(old_mask); + + return success; + +error_disable_all_buffers: + indio_dev->currentmode = INDIO_DIRECT_MODE; +error_run_postdisable: + if (indio_dev->setup_ops->postdisable) + indio_dev->setup_ops->postdisable(indio_dev); +error_remove_inserted: + + if (insert_buffer) + list_del(&insert_buffer->buffer_list); + indio_dev->active_scan_mask = old_mask; + kfree(compound_mask); +error_ret: + + return ret; +} +EXPORT_SYMBOL_GPL(iio_update_buffers); + +ssize_t iio_buffer_store_enable(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + int ret; + bool requested_state; + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct iio_buffer *pbuf = indio_dev->buffer; + bool inlist; + + ret = strtobool(buf, &requested_state); + if (ret < 0) + return ret; + + mutex_lock(&indio_dev->mlock); + + /* Find out if it is in the list */ + inlist = iio_buffer_is_active(indio_dev, pbuf); + /* Already in desired state */ + if (inlist == requested_state) + goto done; + + if (requested_state) + ret = iio_update_buffers(indio_dev, + indio_dev->buffer, NULL); + else + ret = iio_update_buffers(indio_dev, + NULL, indio_dev->buffer); + + if (ret < 0) + goto done; +done: + mutex_unlock(&indio_dev->mlock); + return (ret < 0) ? ret : len; +} +EXPORT_SYMBOL(iio_buffer_store_enable); + +int iio_sw_buffer_preenable(struct iio_dev *indio_dev) +{ + struct iio_buffer *buffer; + unsigned bytes; + dev_dbg(&indio_dev->dev, "%s\n", __func__); + + list_for_each_entry(buffer, &indio_dev->buffer_list, buffer_list) + if (buffer->access->set_bytes_per_datum) { + bytes = iio_compute_scan_bytes(indio_dev, + buffer->scan_mask, + buffer->scan_timestamp); + + buffer->access->set_bytes_per_datum(buffer, bytes); + } return 0; } EXPORT_SYMBOL(iio_sw_buffer_preenable); @@ -599,7 +707,11 @@ static bool iio_validate_scan_mask(struct iio_dev *indio_dev, * iio_scan_mask_set() - set particular bit in the scan mask * @buffer: the buffer whose scan mask we are interested in * @bit: the bit to be set. - **/ + * + * Note that at this point we have no way of knowing what other + * buffers might request, hence this code only verifies that the + * individual buffers request is plausible. + */ int iio_scan_mask_set(struct iio_dev *indio_dev, struct iio_buffer *buffer, int bit) { @@ -682,13 +794,12 @@ static unsigned char *iio_demux(struct iio_buffer *buffer, return buffer->demux_bounce; } -int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data) +static int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data) { unsigned char *dataout = iio_demux(buffer, data); return buffer->access->store_to(buffer, dataout); } -EXPORT_SYMBOL_GPL(iio_push_to_buffer); static void iio_buffer_demux_free(struct iio_buffer *buffer) { @@ -699,10 +810,26 @@ static void iio_buffer_demux_free(struct iio_buffer *buffer) } } -int iio_update_demux(struct iio_dev *indio_dev) + +int iio_push_to_buffers(struct iio_dev *indio_dev, unsigned char *data) +{ + int ret; + struct iio_buffer *buf; + + list_for_each_entry(buf, &indio_dev->buffer_list, buffer_list) { + ret = iio_push_to_buffer(buf, data); + if (ret < 0) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(iio_push_to_buffers); + +static int iio_buffer_update_demux(struct iio_dev *indio_dev, + struct iio_buffer *buffer) { const struct iio_chan_spec *ch; - struct iio_buffer *buffer = indio_dev->buffer; int ret, in_ind = -1, out_ind, length; unsigned in_loc = 0, out_loc = 0; struct iio_demux_table *p; @@ -787,4 +914,23 @@ error_clear_mux_table: return ret; } + +int iio_update_demux(struct iio_dev *indio_dev) +{ + struct iio_buffer *buffer; + int ret; + + list_for_each_entry(buffer, &indio_dev->buffer_list, buffer_list) { + ret = iio_buffer_update_demux(indio_dev, buffer); + if (ret < 0) + goto error_clear_mux_table; + } + return 0; + +error_clear_mux_table: + list_for_each_entry(buffer, &indio_dev->buffer_list, buffer_list) + iio_buffer_demux_free(buffer); + + return ret; +} EXPORT_SYMBOL_GPL(iio_update_demux); diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 6eb24dbc081e..8848f16c547b 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -65,6 +65,7 @@ static const char * const iio_chan_type_name_spec[] = { [IIO_CAPACITANCE] = "capacitance", [IIO_ALTVOLTAGE] = "altvoltage", [IIO_CCT] = "cct", + [IIO_PRESSURE] = "pressure", }; static const char * const iio_modifier_names[] = { @@ -397,11 +398,74 @@ static ssize_t iio_read_channel_info(struct device *dev, val2 = do_div(tmp, 1000000000LL); val = tmp; return sprintf(buf, "%d.%09u\n", val, val2); + case IIO_VAL_FRACTIONAL_LOG2: + tmp = (s64)val * 1000000000LL >> val2; + val2 = do_div(tmp, 1000000000LL); + val = tmp; + return sprintf(buf, "%d.%09u\n", val, val2); default: return 0; } } +/** + * iio_str_to_fixpoint() - Parse a fixed-point number from a string + * @str: The string to parse + * @fract_mult: Multiplier for the first decimal place, should be a power of 10 + * @integer: The integer part of the number + * @fract: The fractional part of the number + * + * Returns 0 on success, or a negative error code if the string could not be + * parsed. + */ +int iio_str_to_fixpoint(const char *str, int fract_mult, + int *integer, int *fract) +{ + int i = 0, f = 0; + bool integer_part = true, negative = false; + + if (str[0] == '-') { + negative = true; + str++; + } else if (str[0] == '+') { + str++; + } + + while (*str) { + if ('0' <= *str && *str <= '9') { + if (integer_part) { + i = i * 10 + *str - '0'; + } else { + f += fract_mult * (*str - '0'); + fract_mult /= 10; + } + } else if (*str == '\n') { + if (*(str + 1) == '\0') + break; + else + return -EINVAL; + } else if (*str == '.' && integer_part) { + integer_part = false; + } else { + return -EINVAL; + } + str++; + } + + if (negative) { + if (i) + i = -i; + else + f = -f; + } + + *integer = i; + *fract = f; + + return 0; +} +EXPORT_SYMBOL_GPL(iio_str_to_fixpoint); + static ssize_t iio_write_channel_info(struct device *dev, struct device_attribute *attr, const char *buf, @@ -409,8 +473,8 @@ static ssize_t iio_write_channel_info(struct device *dev, { struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - int ret, integer = 0, fract = 0, fract_mult = 100000; - bool integer_part = true, negative = false; + int ret, fract_mult = 100000; + int integer, fract; /* Assumes decimal - precision based on number of digits */ if (!indio_dev->info->write_raw) @@ -429,39 +493,9 @@ static ssize_t iio_write_channel_info(struct device *dev, return -EINVAL; } - if (buf[0] == '-') { - negative = true; - buf++; - } - - while (*buf) { - if ('0' <= *buf && *buf <= '9') { - if (integer_part) - integer = integer*10 + *buf - '0'; - else { - fract += fract_mult*(*buf - '0'); - if (fract_mult == 1) - break; - fract_mult /= 10; - } - } else if (*buf == '\n') { - if (*(buf + 1) == '\0') - break; - else - return -EINVAL; - } else if (*buf == '.') { - integer_part = false; - } else { - return -EINVAL; - } - buf++; - } - if (negative) { - if (integer) - integer = -integer; - else - fract = -fract; - } + ret = iio_str_to_fixpoint(buf, fract_mult, &integer, &fract); + if (ret) + return ret; ret = indio_dev->info->write_raw(indio_dev, this_attr->c, integer, fract, this_attr->address); @@ -851,6 +885,7 @@ struct iio_dev *iio_device_alloc(int sizeof_priv) return NULL; } dev_set_name(&dev->dev, "iio:device%d", dev->id); + INIT_LIST_HEAD(&dev->buffer_list); } return dev; diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c index fa6543bf6731..261cae00557e 100644 --- a/drivers/iio/industrialio-event.c +++ b/drivers/iio/industrialio-event.c @@ -239,13 +239,13 @@ static ssize_t iio_ev_value_store(struct device *dev, { struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - unsigned long val; + int val; int ret; if (!indio_dev->info->write_event_value) return -EINVAL; - ret = strict_strtoul(buf, 10, &val); + ret = kstrtoint(buf, 10, &val); if (ret) return ret; @@ -350,15 +350,10 @@ static inline int __iio_add_event_config_attrs(struct iio_dev *indio_dev) ret = iio_device_add_event_sysfs(indio_dev, &indio_dev->channels[j]); if (ret < 0) - goto error_clear_attrs; + return ret; attrcount += ret; } return attrcount; - -error_clear_attrs: - __iio_remove_event_config_attrs(indio_dev); - - return ret; } static bool iio_check_for_dynamic_events(struct iio_dev *indio_dev) diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c index 4fe0ead84213..4d6c7d84e155 100644 --- a/drivers/iio/industrialio-trigger.c +++ b/drivers/iio/industrialio-trigger.c @@ -160,7 +160,7 @@ void iio_trigger_notify_done(struct iio_trigger *trig) trig->use_count--; if (trig->use_count == 0 && trig->ops && trig->ops->try_reenable) if (trig->ops->try_reenable(trig)) - /* Missed and interrupt so launch new poll now */ + /* Missed an interrupt so launch new poll now */ iio_trigger_poll(trig, 0); } EXPORT_SYMBOL(iio_trigger_notify_done); @@ -193,7 +193,7 @@ static void iio_trigger_put_irq(struct iio_trigger *trig, int irq) * This is not currently handled. Alternative of not enabling trigger unless * the relevant function is in there may be the best option. */ -/* Worth protecting against double additions?*/ +/* Worth protecting against double additions? */ static int iio_trigger_attach_poll_func(struct iio_trigger *trig, struct iio_poll_func *pf) { @@ -201,7 +201,7 @@ static int iio_trigger_attach_poll_func(struct iio_trigger *trig, bool notinuse = bitmap_empty(trig->pool, CONFIG_IIO_CONSUMERS_PER_TRIGGER); - /* Prevent the module being removed whilst attached to a trigger */ + /* Prevent the module from being removed whilst attached to a trigger */ __module_get(pf->indio_dev->info->driver_module); pf->irq = iio_trigger_get_irq(trig); ret = request_threaded_irq(pf->irq, pf->h, pf->thread, @@ -288,7 +288,7 @@ void iio_dealloc_pollfunc(struct iio_poll_func *pf) EXPORT_SYMBOL_GPL(iio_dealloc_pollfunc); /** - * iio_trigger_read_current() - trigger consumer sysfs query which trigger + * iio_trigger_read_current() - trigger consumer sysfs query current trigger * * For trigger consumers the current_trigger interface allows the trigger * used by the device to be queried. @@ -305,7 +305,7 @@ static ssize_t iio_trigger_read_current(struct device *dev, } /** - * iio_trigger_write_current() trigger consumer sysfs set current trigger + * iio_trigger_write_current() - trigger consumer sysfs set current trigger * * For trigger consumers the current_trigger interface allows the trigger * used for this device to be specified at run time based on the triggers @@ -476,7 +476,7 @@ void iio_device_register_trigger_consumer(struct iio_dev *indio_dev) void iio_device_unregister_trigger_consumer(struct iio_dev *indio_dev) { - /* Clean up and associated but not attached triggers references */ + /* Clean up an associated but not attached trigger reference */ if (indio_dev->trig) iio_trigger_put(indio_dev->trig); } diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index f2b78d4fe457..b289915b8469 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -54,39 +54,25 @@ error_ret: EXPORT_SYMBOL_GPL(iio_map_array_register); -/* Assumes the exact same array (e.g. memory locations) - * used at unregistration as used at registration rather than - * more complex checking of contents. +/* + * Remove all map entries associated with the given iio device */ -int iio_map_array_unregister(struct iio_dev *indio_dev, - struct iio_map *maps) +int iio_map_array_unregister(struct iio_dev *indio_dev) { - int i = 0, ret = 0; - bool found_it; + int ret = -ENODEV; struct iio_map_internal *mapi; - - if (maps == NULL) - return 0; + struct list_head *pos, *tmp; mutex_lock(&iio_map_list_lock); - while (maps[i].consumer_dev_name != NULL) { - found_it = false; - list_for_each_entry(mapi, &iio_map_list, l) - if (&maps[i] == mapi->map) { - list_del(&mapi->l); - kfree(mapi); - found_it = true; - break; - } - if (found_it == false) { - ret = -ENODEV; - goto error_ret; + list_for_each_safe(pos, tmp, &iio_map_list) { + mapi = list_entry(pos, struct iio_map_internal, l); + if (indio_dev == mapi->indio_dev) { + list_del(&mapi->l); + kfree(mapi); + ret = 0; } - i++; } -error_ret: mutex_unlock(&iio_map_list_lock); - return ret; } EXPORT_SYMBOL_GPL(iio_map_array_unregister); @@ -107,7 +93,8 @@ static const struct iio_chan_spec } -struct iio_channel *iio_channel_get(const char *name, const char *channel_name) +static struct iio_channel *iio_channel_get_sys(const char *name, + const char *channel_name) { struct iio_map_internal *c_i = NULL, *c = NULL; struct iio_channel *channel; @@ -158,6 +145,14 @@ error_no_mem: iio_device_put(c->indio_dev); return ERR_PTR(err); } + +struct iio_channel *iio_channel_get(struct device *dev, + const char *channel_name) +{ + const char *name = dev ? dev_name(dev) : NULL; + + return iio_channel_get_sys(name, channel_name); +} EXPORT_SYMBOL_GPL(iio_channel_get); void iio_channel_release(struct iio_channel *channel) @@ -167,16 +162,18 @@ void iio_channel_release(struct iio_channel *channel) } EXPORT_SYMBOL_GPL(iio_channel_release); -struct iio_channel *iio_channel_get_all(const char *name) +struct iio_channel *iio_channel_get_all(struct device *dev) { + const char *name; struct iio_channel *chans; struct iio_map_internal *c = NULL; int nummaps = 0; int mapind = 0; int i, ret; - if (name == NULL) + if (dev == NULL) return ERR_PTR(-EINVAL); + name = dev_name(dev); mutex_lock(&iio_map_list_lock); /* first count the matching maps */ @@ -203,6 +200,7 @@ struct iio_channel *iio_channel_get_all(const char *name) if (name && strcmp(name, c->map->consumer_dev_name) != 0) continue; chans[mapind].indio_dev = c->indio_dev; + chans[mapind].data = c->map->consumer_data; chans[mapind].channel = iio_chan_spec_from_name(chans[mapind].indio_dev, c->map->adc_channel_label); @@ -314,6 +312,9 @@ static int iio_convert_raw_to_processed_unlocked(struct iio_channel *chan, *processed = div_s64(raw64 * (s64)scale_val * scale, scale_val2); break; + case IIO_VAL_FRACTIONAL_LOG2: + *processed = (raw64 * (s64)scale_val * scale) >> scale_val2; + break; default: return -EINVAL; } diff --git a/drivers/iio/kfifo_buf.c b/drivers/iio/kfifo_buf.c index 5bc5c860e9ca..a923c78d5cb4 100644 --- a/drivers/iio/kfifo_buf.c +++ b/drivers/iio/kfifo_buf.c @@ -22,7 +22,6 @@ static inline int __iio_allocate_kfifo(struct iio_kfifo *buf, if ((length == 0) || (bytes_per_datum == 0)) return -EINVAL; - __iio_update_buffer(&buf->buffer, bytes_per_datum, length); return __kfifo_alloc((struct __kfifo *)&buf->kf, length, bytes_per_datum, GFP_KERNEL); } diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index 1763c9bcb98a..5ef1a396e0c9 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -32,6 +32,16 @@ config SENSORS_LM3533 changes. The ALS-control output values can be set per zone for the three current output channels. +config SENSORS_TSL2563 + tristate "TAOS TSL2560, TSL2561, TSL2562 and TSL2563 ambient light sensors" + depends on I2C + help + If you say yes here you get support for the Taos TSL2560, + TSL2561, TSL2562 and TSL2563 ambient light sensors. + + This driver can also be built as a module. If so, the module + will be called tsl2563. + config VCNL4000 tristate "VCNL4000 combined ALS and proximity sensor" depends on I2C @@ -47,6 +57,7 @@ config HID_SENSOR_ALS select IIO_BUFFER select IIO_TRIGGERED_BUFFER select HID_SENSOR_IIO_COMMON + select HID_SENSOR_IIO_TRIGGER tristate "HID ALS" help Say yes here to build support for the HID SENSOR diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index 21a8f0df1407..040d9c75f8e6 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -4,5 +4,6 @@ obj-$(CONFIG_ADJD_S311) += adjd_s311.o obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o +obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o obj-$(CONFIG_VCNL4000) += vcnl4000.o obj-$(CONFIG_HID_SENSOR_ALS) += hid-sensor-als.o diff --git a/drivers/iio/light/adjd_s311.c b/drivers/iio/light/adjd_s311.c index 164b62b91a4b..d5b9d39d95b2 100644 --- a/drivers/iio/light/adjd_s311.c +++ b/drivers/iio/light/adjd_s311.c @@ -164,7 +164,6 @@ static irqreturn_t adjd_s311_trigger_handler(int irq, void *p) struct iio_poll_func *pf = p; struct iio_dev *indio_dev = pf->indio_dev; struct adjd_s311_data *data = iio_priv(indio_dev); - struct iio_buffer *buffer = indio_dev->buffer; s64 time_ns = iio_get_time_ns(); int len = 0; int i, j = 0; @@ -187,7 +186,7 @@ static irqreturn_t adjd_s311_trigger_handler(int irq, void *p) if (indio_dev->scan_timestamp) *(s64 *)((u8 *)data->buffer + ALIGN(len, sizeof(s64))) = time_ns; - iio_push_to_buffer(buffer, (u8 *)data->buffer); + iio_push_to_buffers(indio_dev, (u8 *)data->buffer); done: iio_trigger_notify_done(indio_dev->trig); @@ -287,8 +286,8 @@ static const struct iio_info adjd_s311_info = { .driver_module = THIS_MODULE, }; -static int __devinit adjd_s311_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int adjd_s311_probe(struct i2c_client *client, + const struct i2c_device_id *id) { struct adjd_s311_data *data; struct iio_dev *indio_dev; @@ -331,7 +330,7 @@ exit: return err; } -static int __devexit adjd_s311_remove(struct i2c_client *client) +static int adjd_s311_remove(struct i2c_client *client) { struct iio_dev *indio_dev = i2c_get_clientdata(client); struct adjd_s311_data *data = iio_priv(indio_dev); @@ -355,7 +354,7 @@ static struct i2c_driver adjd_s311_driver = { .name = ADJD_S311_DRV_NAME, }, .probe = adjd_s311_probe, - .remove = __devexit_p(adjd_s311_remove), + .remove = adjd_s311_remove, .id_table = adjd_s311_id, }; module_i2c_driver(adjd_s311_driver); diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c index 96e3691e42c4..3d7e8c9b4beb 100644 --- a/drivers/iio/light/hid-sensor-als.c +++ b/drivers/iio/light/hid-sensor-als.c @@ -28,7 +28,6 @@ #include <linux/iio/buffer.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> -#include "../common/hid-sensors/hid-sensor-attributes.h" #include "../common/hid-sensors/hid-sensor-trigger.h" /*Format: HID-SENSOR-usage_id_in_hex*/ @@ -39,7 +38,7 @@ struct als_state { struct hid_sensor_hub_callbacks callbacks; - struct hid_sensor_iio_common common_attributes; + struct hid_sensor_common common_attributes; struct hid_sensor_hub_attribute_info als_illum; u32 illum; }; @@ -176,21 +175,8 @@ static const struct iio_info als_info = { /* Function to push data to buffer */ static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len) { - struct iio_buffer *buffer = indio_dev->buffer; - int datum_sz; - dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n"); - if (!buffer) { - dev_err(&indio_dev->dev, "Buffer == NULL\n"); - return; - } - datum_sz = buffer->access->get_bytes_per_datum(buffer); - if (len > datum_sz) { - dev_err(&indio_dev->dev, "Datum size mismatch %d:%d\n", len, - datum_sz); - return; - } - iio_push_to_buffer(buffer, (u8 *)data); + iio_push_to_buffers(indio_dev, (u8 *)data); } /* Callback handler to send event after all samples are received and captured */ @@ -258,7 +244,7 @@ static int als_parse_report(struct platform_device *pdev, } /* Function to initialize the processing for usage id */ -static int __devinit hid_als_probe(struct platform_device *pdev) +static int hid_als_probe(struct platform_device *pdev) { int ret = 0; static const char *name = "als"; @@ -285,10 +271,9 @@ static int __devinit hid_als_probe(struct platform_device *pdev) goto error_free_dev; } - channels = kmemdup(als_channels, - sizeof(als_channels), - GFP_KERNEL); + channels = kmemdup(als_channels, sizeof(als_channels), GFP_KERNEL); if (!channels) { + ret = -ENOMEM; dev_err(&pdev->dev, "failed to duplicate channels\n"); goto error_free_dev; } @@ -355,7 +340,7 @@ error_ret: } /* Function to deinitialize the processing for usage id */ -static int __devinit hid_als_remove(struct platform_device *pdev) +static int hid_als_remove(struct platform_device *pdev) { struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; struct iio_dev *indio_dev = platform_get_drvdata(pdev); diff --git a/drivers/iio/light/lm3533-als.c b/drivers/iio/light/lm3533-als.c index e45712a921ce..7503012ce933 100644 --- a/drivers/iio/light/lm3533-als.c +++ b/drivers/iio/light/lm3533-als.c @@ -718,8 +718,7 @@ static struct attribute_group lm3533_als_attribute_group = { .attrs = lm3533_als_attributes }; -static int __devinit lm3533_als_set_input_mode(struct lm3533_als *als, - bool pwm_mode) +static int lm3533_als_set_input_mode(struct lm3533_als *als, bool pwm_mode) { u8 mask = LM3533_ALS_INPUT_MODE_MASK; u8 val; @@ -740,7 +739,7 @@ static int __devinit lm3533_als_set_input_mode(struct lm3533_als *als, return 0; } -static int __devinit lm3533_als_set_resistor(struct lm3533_als *als, u8 val) +static int lm3533_als_set_resistor(struct lm3533_als *als, u8 val) { int ret; @@ -756,8 +755,8 @@ static int __devinit lm3533_als_set_resistor(struct lm3533_als *als, u8 val) return 0; } -static int __devinit lm3533_als_setup(struct lm3533_als *als, - struct lm3533_als_platform_data *pdata) +static int lm3533_als_setup(struct lm3533_als *als, + struct lm3533_als_platform_data *pdata) { int ret; @@ -775,7 +774,7 @@ static int __devinit lm3533_als_setup(struct lm3533_als *als, return 0; } -static int __devinit lm3533_als_setup_irq(struct lm3533_als *als, void *dev) +static int lm3533_als_setup_irq(struct lm3533_als *als, void *dev) { u8 mask = LM3533_ALS_INT_ENABLE_MASK; int ret; @@ -799,7 +798,7 @@ static int __devinit lm3533_als_setup_irq(struct lm3533_als *als, void *dev) return 0; } -static int __devinit lm3533_als_enable(struct lm3533_als *als) +static int lm3533_als_enable(struct lm3533_als *als) { u8 mask = LM3533_ALS_ENABLE_MASK; int ret; @@ -830,7 +829,7 @@ static const struct iio_info lm3533_als_info = { .read_raw = &lm3533_als_read_raw, }; -static int __devinit lm3533_als_probe(struct platform_device *pdev) +static int lm3533_als_probe(struct platform_device *pdev) { struct lm3533 *lm3533; struct lm3533_als_platform_data *pdata; @@ -901,7 +900,7 @@ err_free_dev: return ret; } -static int __devexit lm3533_als_remove(struct platform_device *pdev) +static int lm3533_als_remove(struct platform_device *pdev) { struct iio_dev *indio_dev = platform_get_drvdata(pdev); struct lm3533_als *als = iio_priv(indio_dev); @@ -922,7 +921,7 @@ static struct platform_driver lm3533_als_driver = { .owner = THIS_MODULE, }, .probe = lm3533_als_probe, - .remove = __devexit_p(lm3533_als_remove), + .remove = lm3533_als_remove, }; module_platform_driver(lm3533_als_driver); diff --git a/drivers/iio/light/tsl2563.c b/drivers/iio/light/tsl2563.c new file mode 100644 index 000000000000..fd8be69b7d05 --- /dev/null +++ b/drivers/iio/light/tsl2563.c @@ -0,0 +1,887 @@ +/* + * drivers/iio/light/tsl2563.c + * + * Copyright (C) 2008 Nokia Corporation + * + * Written by Timo O. Karjalainen <timo.o.karjalainen@nokia.com> + * Contact: Amit Kucheria <amit.kucheria@verdurent.com> + * + * Converted to IIO driver + * Amit Kucheria <amit.kucheria@verdurent.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/sched.h> +#include <linux/mutex.h> +#include <linux/delay.h> +#include <linux/pm.h> +#include <linux/err.h> +#include <linux/slab.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/events.h> +#include <linux/platform_data/tsl2563.h> + +/* Use this many bits for fraction part. */ +#define ADC_FRAC_BITS 14 + +/* Given number of 1/10000's in ADC_FRAC_BITS precision. */ +#define FRAC10K(f) (((f) * (1L << (ADC_FRAC_BITS))) / (10000)) + +/* Bits used for fraction in calibration coefficients.*/ +#define CALIB_FRAC_BITS 10 +/* 0.5 in CALIB_FRAC_BITS precision */ +#define CALIB_FRAC_HALF (1 << (CALIB_FRAC_BITS - 1)) +/* Make a fraction from a number n that was multiplied with b. */ +#define CALIB_FRAC(n, b) (((n) << CALIB_FRAC_BITS) / (b)) +/* Decimal 10^(digits in sysfs presentation) */ +#define CALIB_BASE_SYSFS 1000 + +#define TSL2563_CMD 0x80 +#define TSL2563_CLEARINT 0x40 + +#define TSL2563_REG_CTRL 0x00 +#define TSL2563_REG_TIMING 0x01 +#define TSL2563_REG_LOWLOW 0x02 /* data0 low threshold, 2 bytes */ +#define TSL2563_REG_LOWHIGH 0x03 +#define TSL2563_REG_HIGHLOW 0x04 /* data0 high threshold, 2 bytes */ +#define TSL2563_REG_HIGHHIGH 0x05 +#define TSL2563_REG_INT 0x06 +#define TSL2563_REG_ID 0x0a +#define TSL2563_REG_DATA0LOW 0x0c /* broadband sensor value, 2 bytes */ +#define TSL2563_REG_DATA0HIGH 0x0d +#define TSL2563_REG_DATA1LOW 0x0e /* infrared sensor value, 2 bytes */ +#define TSL2563_REG_DATA1HIGH 0x0f + +#define TSL2563_CMD_POWER_ON 0x03 +#define TSL2563_CMD_POWER_OFF 0x00 +#define TSL2563_CTRL_POWER_MASK 0x03 + +#define TSL2563_TIMING_13MS 0x00 +#define TSL2563_TIMING_100MS 0x01 +#define TSL2563_TIMING_400MS 0x02 +#define TSL2563_TIMING_MASK 0x03 +#define TSL2563_TIMING_GAIN16 0x10 +#define TSL2563_TIMING_GAIN1 0x00 + +#define TSL2563_INT_DISBLED 0x00 +#define TSL2563_INT_LEVEL 0x10 +#define TSL2563_INT_PERSIST(n) ((n) & 0x0F) + +struct tsl2563_gainlevel_coeff { + u8 gaintime; + u16 min; + u16 max; +}; + +static const struct tsl2563_gainlevel_coeff tsl2563_gainlevel_table[] = { + { + .gaintime = TSL2563_TIMING_400MS | TSL2563_TIMING_GAIN16, + .min = 0, + .max = 65534, + }, { + .gaintime = TSL2563_TIMING_400MS | TSL2563_TIMING_GAIN1, + .min = 2048, + .max = 65534, + }, { + .gaintime = TSL2563_TIMING_100MS | TSL2563_TIMING_GAIN1, + .min = 4095, + .max = 37177, + }, { + .gaintime = TSL2563_TIMING_13MS | TSL2563_TIMING_GAIN1, + .min = 3000, + .max = 65535, + }, +}; + +struct tsl2563_chip { + struct mutex lock; + struct i2c_client *client; + struct delayed_work poweroff_work; + + /* Remember state for suspend and resume functions */ + bool suspended; + + struct tsl2563_gainlevel_coeff const *gainlevel; + + u16 low_thres; + u16 high_thres; + u8 intr; + bool int_enabled; + + /* Calibration coefficients */ + u32 calib0; + u32 calib1; + int cover_comp_gain; + + /* Cache current values, to be returned while suspended */ + u32 data0; + u32 data1; +}; + +static int tsl2563_set_power(struct tsl2563_chip *chip, int on) +{ + struct i2c_client *client = chip->client; + u8 cmd; + + cmd = on ? TSL2563_CMD_POWER_ON : TSL2563_CMD_POWER_OFF; + return i2c_smbus_write_byte_data(client, + TSL2563_CMD | TSL2563_REG_CTRL, cmd); +} + +/* + * Return value is 0 for off, 1 for on, or a negative error + * code if reading failed. + */ +static int tsl2563_get_power(struct tsl2563_chip *chip) +{ + struct i2c_client *client = chip->client; + int ret; + + ret = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_CTRL); + if (ret < 0) + return ret; + + return (ret & TSL2563_CTRL_POWER_MASK) == TSL2563_CMD_POWER_ON; +} + +static int tsl2563_configure(struct tsl2563_chip *chip) +{ + int ret; + + ret = i2c_smbus_write_byte_data(chip->client, + TSL2563_CMD | TSL2563_REG_TIMING, + chip->gainlevel->gaintime); + if (ret) + goto error_ret; + ret = i2c_smbus_write_byte_data(chip->client, + TSL2563_CMD | TSL2563_REG_HIGHLOW, + chip->high_thres & 0xFF); + if (ret) + goto error_ret; + ret = i2c_smbus_write_byte_data(chip->client, + TSL2563_CMD | TSL2563_REG_HIGHHIGH, + (chip->high_thres >> 8) & 0xFF); + if (ret) + goto error_ret; + ret = i2c_smbus_write_byte_data(chip->client, + TSL2563_CMD | TSL2563_REG_LOWLOW, + chip->low_thres & 0xFF); + if (ret) + goto error_ret; + ret = i2c_smbus_write_byte_data(chip->client, + TSL2563_CMD | TSL2563_REG_LOWHIGH, + (chip->low_thres >> 8) & 0xFF); +/* + * Interrupt register is automatically written anyway if it is relevant + * so is not here. + */ +error_ret: + return ret; +} + +static void tsl2563_poweroff_work(struct work_struct *work) +{ + struct tsl2563_chip *chip = + container_of(work, struct tsl2563_chip, poweroff_work.work); + tsl2563_set_power(chip, 0); +} + +static int tsl2563_detect(struct tsl2563_chip *chip) +{ + int ret; + + ret = tsl2563_set_power(chip, 1); + if (ret) + return ret; + + ret = tsl2563_get_power(chip); + if (ret < 0) + return ret; + + return ret ? 0 : -ENODEV; +} + +static int tsl2563_read_id(struct tsl2563_chip *chip, u8 *id) +{ + struct i2c_client *client = chip->client; + int ret; + + ret = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_ID); + if (ret < 0) + return ret; + + *id = ret; + + return 0; +} + +/* + * "Normalized" ADC value is one obtained with 400ms of integration time and + * 16x gain. This function returns the number of bits of shift needed to + * convert between normalized values and HW values obtained using given + * timing and gain settings. + */ +static int adc_shiftbits(u8 timing) +{ + int shift = 0; + + switch (timing & TSL2563_TIMING_MASK) { + case TSL2563_TIMING_13MS: + shift += 5; + break; + case TSL2563_TIMING_100MS: + shift += 2; + break; + case TSL2563_TIMING_400MS: + /* no-op */ + break; + } + + if (!(timing & TSL2563_TIMING_GAIN16)) + shift += 4; + + return shift; +} + +/* Convert a HW ADC value to normalized scale. */ +static u32 normalize_adc(u16 adc, u8 timing) +{ + return adc << adc_shiftbits(timing); +} + +static void tsl2563_wait_adc(struct tsl2563_chip *chip) +{ + unsigned int delay; + + switch (chip->gainlevel->gaintime & TSL2563_TIMING_MASK) { + case TSL2563_TIMING_13MS: + delay = 14; + break; + case TSL2563_TIMING_100MS: + delay = 101; + break; + default: + delay = 402; + } + /* + * TODO: Make sure that we wait at least required delay but why we + * have to extend it one tick more? + */ + schedule_timeout_interruptible(msecs_to_jiffies(delay) + 2); +} + +static int tsl2563_adjust_gainlevel(struct tsl2563_chip *chip, u16 adc) +{ + struct i2c_client *client = chip->client; + + if (adc > chip->gainlevel->max || adc < chip->gainlevel->min) { + + (adc > chip->gainlevel->max) ? + chip->gainlevel++ : chip->gainlevel--; + + i2c_smbus_write_byte_data(client, + TSL2563_CMD | TSL2563_REG_TIMING, + chip->gainlevel->gaintime); + + tsl2563_wait_adc(chip); + tsl2563_wait_adc(chip); + + return 1; + } else + return 0; +} + +static int tsl2563_get_adc(struct tsl2563_chip *chip) +{ + struct i2c_client *client = chip->client; + u16 adc0, adc1; + int retry = 1; + int ret = 0; + + if (chip->suspended) + goto out; + + if (!chip->int_enabled) { + cancel_delayed_work(&chip->poweroff_work); + + if (!tsl2563_get_power(chip)) { + ret = tsl2563_set_power(chip, 1); + if (ret) + goto out; + ret = tsl2563_configure(chip); + if (ret) + goto out; + tsl2563_wait_adc(chip); + } + } + + while (retry) { + ret = i2c_smbus_read_word_data(client, + TSL2563_CMD | TSL2563_REG_DATA0LOW); + if (ret < 0) + goto out; + adc0 = ret; + + ret = i2c_smbus_read_word_data(client, + TSL2563_CMD | TSL2563_REG_DATA1LOW); + if (ret < 0) + goto out; + adc1 = ret; + + retry = tsl2563_adjust_gainlevel(chip, adc0); + } + + chip->data0 = normalize_adc(adc0, chip->gainlevel->gaintime); + chip->data1 = normalize_adc(adc1, chip->gainlevel->gaintime); + + if (!chip->int_enabled) + schedule_delayed_work(&chip->poweroff_work, 5 * HZ); + + ret = 0; +out: + return ret; +} + +static inline int calib_to_sysfs(u32 calib) +{ + return (int) (((calib * CALIB_BASE_SYSFS) + + CALIB_FRAC_HALF) >> CALIB_FRAC_BITS); +} + +static inline u32 calib_from_sysfs(int value) +{ + return (((u32) value) << CALIB_FRAC_BITS) / CALIB_BASE_SYSFS; +} + +/* + * Conversions between lux and ADC values. + * + * The basic formula is lux = c0 * adc0 - c1 * adc1, where c0 and c1 are + * appropriate constants. Different constants are needed for different + * kinds of light, determined by the ratio adc1/adc0 (basically the ratio + * of the intensities in infrared and visible wavelengths). lux_table below + * lists the upper threshold of the adc1/adc0 ratio and the corresponding + * constants. + */ + +struct tsl2563_lux_coeff { + unsigned long ch_ratio; + unsigned long ch0_coeff; + unsigned long ch1_coeff; +}; + +static const struct tsl2563_lux_coeff lux_table[] = { + { + .ch_ratio = FRAC10K(1300), + .ch0_coeff = FRAC10K(315), + .ch1_coeff = FRAC10K(262), + }, { + .ch_ratio = FRAC10K(2600), + .ch0_coeff = FRAC10K(337), + .ch1_coeff = FRAC10K(430), + }, { + .ch_ratio = FRAC10K(3900), + .ch0_coeff = FRAC10K(363), + .ch1_coeff = FRAC10K(529), + }, { + .ch_ratio = FRAC10K(5200), + .ch0_coeff = FRAC10K(392), + .ch1_coeff = FRAC10K(605), + }, { + .ch_ratio = FRAC10K(6500), + .ch0_coeff = FRAC10K(229), + .ch1_coeff = FRAC10K(291), + }, { + .ch_ratio = FRAC10K(8000), + .ch0_coeff = FRAC10K(157), + .ch1_coeff = FRAC10K(180), + }, { + .ch_ratio = FRAC10K(13000), + .ch0_coeff = FRAC10K(34), + .ch1_coeff = FRAC10K(26), + }, { + .ch_ratio = ULONG_MAX, + .ch0_coeff = 0, + .ch1_coeff = 0, + }, +}; + +/* Convert normalized, scaled ADC values to lux. */ +static unsigned int adc_to_lux(u32 adc0, u32 adc1) +{ + const struct tsl2563_lux_coeff *lp = lux_table; + unsigned long ratio, lux, ch0 = adc0, ch1 = adc1; + + ratio = ch0 ? ((ch1 << ADC_FRAC_BITS) / ch0) : ULONG_MAX; + + while (lp->ch_ratio < ratio) + lp++; + + lux = ch0 * lp->ch0_coeff - ch1 * lp->ch1_coeff; + + return (unsigned int) (lux >> ADC_FRAC_BITS); +} + +/* Apply calibration coefficient to ADC count. */ +static u32 calib_adc(u32 adc, u32 calib) +{ + unsigned long scaled = adc; + + scaled *= calib; + scaled >>= CALIB_FRAC_BITS; + + return (u32) scaled; +} + +static int tsl2563_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct tsl2563_chip *chip = iio_priv(indio_dev); + + if (chan->channel == IIO_MOD_LIGHT_BOTH) + chip->calib0 = calib_from_sysfs(val); + else + chip->calib1 = calib_from_sysfs(val); + + return 0; +} + +static int tsl2563_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + int ret = -EINVAL; + u32 calib0, calib1; + struct tsl2563_chip *chip = iio_priv(indio_dev); + + mutex_lock(&chip->lock); + switch (m) { + case IIO_CHAN_INFO_RAW: + case IIO_CHAN_INFO_PROCESSED: + switch (chan->type) { + case IIO_LIGHT: + ret = tsl2563_get_adc(chip); + if (ret) + goto error_ret; + calib0 = calib_adc(chip->data0, chip->calib0) * + chip->cover_comp_gain; + calib1 = calib_adc(chip->data1, chip->calib1) * + chip->cover_comp_gain; + *val = adc_to_lux(calib0, calib1); + ret = IIO_VAL_INT; + break; + case IIO_INTENSITY: + ret = tsl2563_get_adc(chip); + if (ret) + goto error_ret; + if (chan->channel == 0) + *val = chip->data0; + else + *val = chip->data1; + ret = IIO_VAL_INT; + break; + default: + break; + } + break; + + case IIO_CHAN_INFO_CALIBSCALE: + if (chan->channel == 0) + *val = calib_to_sysfs(chip->calib0); + else + *val = calib_to_sysfs(chip->calib1); + ret = IIO_VAL_INT; + break; + default: + ret = -EINVAL; + goto error_ret; + } + +error_ret: + mutex_unlock(&chip->lock); + return ret; +} + +static const struct iio_chan_spec tsl2563_channels[] = { + { + .type = IIO_LIGHT, + .indexed = 1, + .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT, + .channel = 0, + }, { + .type = IIO_INTENSITY, + .modified = 1, + .channel2 = IIO_MOD_LIGHT_BOTH, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, + .event_mask = (IIO_EV_BIT(IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING) | + IIO_EV_BIT(IIO_EV_TYPE_THRESH, + IIO_EV_DIR_FALLING)), + }, { + .type = IIO_INTENSITY, + .modified = 1, + .channel2 = IIO_MOD_LIGHT_IR, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, + } +}; + +static int tsl2563_read_thresh(struct iio_dev *indio_dev, + u64 event_code, + int *val) +{ + struct tsl2563_chip *chip = iio_priv(indio_dev); + + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + *val = chip->high_thres; + break; + case IIO_EV_DIR_FALLING: + *val = chip->low_thres; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int tsl2563_write_thresh(struct iio_dev *indio_dev, + u64 event_code, + int val) +{ + struct tsl2563_chip *chip = iio_priv(indio_dev); + int ret; + u8 address; + + if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_RISING) + address = TSL2563_REG_HIGHLOW; + else + address = TSL2563_REG_LOWLOW; + mutex_lock(&chip->lock); + ret = i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | address, + val & 0xFF); + if (ret) + goto error_ret; + ret = i2c_smbus_write_byte_data(chip->client, + TSL2563_CMD | (address + 1), + (val >> 8) & 0xFF); + if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_RISING) + chip->high_thres = val; + else + chip->low_thres = val; + +error_ret: + mutex_unlock(&chip->lock); + + return ret; +} + +static irqreturn_t tsl2563_event_handler(int irq, void *private) +{ + struct iio_dev *dev_info = private; + struct tsl2563_chip *chip = iio_priv(dev_info); + + iio_push_event(dev_info, + IIO_UNMOD_EVENT_CODE(IIO_LIGHT, + 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER), + iio_get_time_ns()); + + /* clear the interrupt and push the event */ + i2c_smbus_write_byte(chip->client, TSL2563_CMD | TSL2563_CLEARINT); + return IRQ_HANDLED; +} + +static int tsl2563_write_interrupt_config(struct iio_dev *indio_dev, + u64 event_code, + int state) +{ + struct tsl2563_chip *chip = iio_priv(indio_dev); + int ret = 0; + + mutex_lock(&chip->lock); + if (state && !(chip->intr & 0x30)) { + chip->intr &= ~0x30; + chip->intr |= 0x10; + /* ensure the chip is actually on */ + cancel_delayed_work(&chip->poweroff_work); + if (!tsl2563_get_power(chip)) { + ret = tsl2563_set_power(chip, 1); + if (ret) + goto out; + ret = tsl2563_configure(chip); + if (ret) + goto out; + } + ret = i2c_smbus_write_byte_data(chip->client, + TSL2563_CMD | TSL2563_REG_INT, + chip->intr); + chip->int_enabled = true; + } + + if (!state && (chip->intr & 0x30)) { + chip->intr &= ~0x30; + ret = i2c_smbus_write_byte_data(chip->client, + TSL2563_CMD | TSL2563_REG_INT, + chip->intr); + chip->int_enabled = false; + /* now the interrupt is not enabled, we can go to sleep */ + schedule_delayed_work(&chip->poweroff_work, 5 * HZ); + } +out: + mutex_unlock(&chip->lock); + + return ret; +} + +static int tsl2563_read_interrupt_config(struct iio_dev *indio_dev, + u64 event_code) +{ + struct tsl2563_chip *chip = iio_priv(indio_dev); + int ret; + + mutex_lock(&chip->lock); + ret = i2c_smbus_read_byte_data(chip->client, + TSL2563_CMD | TSL2563_REG_INT); + mutex_unlock(&chip->lock); + if (ret < 0) + return ret; + + return !!(ret & 0x30); +} + +static const struct iio_info tsl2563_info_no_irq = { + .driver_module = THIS_MODULE, + .read_raw = &tsl2563_read_raw, + .write_raw = &tsl2563_write_raw, +}; + +static const struct iio_info tsl2563_info = { + .driver_module = THIS_MODULE, + .read_raw = &tsl2563_read_raw, + .write_raw = &tsl2563_write_raw, + .read_event_value = &tsl2563_read_thresh, + .write_event_value = &tsl2563_write_thresh, + .read_event_config = &tsl2563_read_interrupt_config, + .write_event_config = &tsl2563_write_interrupt_config, +}; + +static int tsl2563_probe(struct i2c_client *client, + const struct i2c_device_id *device_id) +{ + struct iio_dev *indio_dev; + struct tsl2563_chip *chip; + struct tsl2563_platform_data *pdata = client->dev.platform_data; + int err = 0; + u8 id = 0; + + indio_dev = iio_device_alloc(sizeof(*chip)); + if (!indio_dev) + return -ENOMEM; + + chip = iio_priv(indio_dev); + + i2c_set_clientdata(client, chip); + chip->client = client; + + err = tsl2563_detect(chip); + if (err) { + dev_err(&client->dev, "detect error %d\n", -err); + goto fail1; + } + + err = tsl2563_read_id(chip, &id); + if (err) { + dev_err(&client->dev, "read id error %d\n", -err); + goto fail1; + } + + mutex_init(&chip->lock); + + /* Default values used until userspace says otherwise */ + chip->low_thres = 0x0; + chip->high_thres = 0xffff; + chip->gainlevel = tsl2563_gainlevel_table; + chip->intr = TSL2563_INT_PERSIST(4); + chip->calib0 = calib_from_sysfs(CALIB_BASE_SYSFS); + chip->calib1 = calib_from_sysfs(CALIB_BASE_SYSFS); + + if (pdata) + chip->cover_comp_gain = pdata->cover_comp_gain; + else + chip->cover_comp_gain = 1; + + dev_info(&client->dev, "model %d, rev. %d\n", id >> 4, id & 0x0f); + indio_dev->name = client->name; + indio_dev->channels = tsl2563_channels; + indio_dev->num_channels = ARRAY_SIZE(tsl2563_channels); + indio_dev->dev.parent = &client->dev; + indio_dev->modes = INDIO_DIRECT_MODE; + + if (client->irq) + indio_dev->info = &tsl2563_info; + else + indio_dev->info = &tsl2563_info_no_irq; + + if (client->irq) { + err = request_threaded_irq(client->irq, + NULL, + &tsl2563_event_handler, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "tsl2563_event", + indio_dev); + if (err) { + dev_err(&client->dev, "irq request error %d\n", -err); + goto fail1; + } + } + + err = tsl2563_configure(chip); + if (err) { + dev_err(&client->dev, "configure error %d\n", -err); + goto fail2; + } + + INIT_DELAYED_WORK(&chip->poweroff_work, tsl2563_poweroff_work); + + /* The interrupt cannot yet be enabled so this is fine without lock */ + schedule_delayed_work(&chip->poweroff_work, 5 * HZ); + + err = iio_device_register(indio_dev); + if (err) { + dev_err(&client->dev, "iio registration error %d\n", -err); + goto fail3; + } + + return 0; + +fail3: + cancel_delayed_work(&chip->poweroff_work); + flush_scheduled_work(); +fail2: + if (client->irq) + free_irq(client->irq, indio_dev); +fail1: + iio_device_free(indio_dev); + return err; +} + +static int tsl2563_remove(struct i2c_client *client) +{ + struct tsl2563_chip *chip = i2c_get_clientdata(client); + struct iio_dev *indio_dev = iio_priv_to_dev(chip); + + iio_device_unregister(indio_dev); + if (!chip->int_enabled) + cancel_delayed_work(&chip->poweroff_work); + /* Ensure that interrupts are disabled - then flush any bottom halves */ + chip->intr &= ~0x30; + i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | TSL2563_REG_INT, + chip->intr); + flush_scheduled_work(); + tsl2563_set_power(chip, 0); + if (client->irq) + free_irq(client->irq, indio_dev); + + iio_device_free(indio_dev); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int tsl2563_suspend(struct device *dev) +{ + struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(dev)); + int ret; + + mutex_lock(&chip->lock); + + ret = tsl2563_set_power(chip, 0); + if (ret) + goto out; + + chip->suspended = true; + +out: + mutex_unlock(&chip->lock); + return ret; +} + +static int tsl2563_resume(struct device *dev) +{ + struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(dev)); + int ret; + + mutex_lock(&chip->lock); + + ret = tsl2563_set_power(chip, 1); + if (ret) + goto out; + + ret = tsl2563_configure(chip); + if (ret) + goto out; + + chip->suspended = false; + +out: + mutex_unlock(&chip->lock); + return ret; +} + +static SIMPLE_DEV_PM_OPS(tsl2563_pm_ops, tsl2563_suspend, tsl2563_resume); +#define TSL2563_PM_OPS (&tsl2563_pm_ops) +#else +#define TSL2563_PM_OPS NULL +#endif + +static const struct i2c_device_id tsl2563_id[] = { + { "tsl2560", 0 }, + { "tsl2561", 1 }, + { "tsl2562", 2 }, + { "tsl2563", 3 }, + {} +}; +MODULE_DEVICE_TABLE(i2c, tsl2563_id); + +static struct i2c_driver tsl2563_i2c_driver = { + .driver = { + .name = "tsl2563", + .pm = TSL2563_PM_OPS, + }, + .probe = tsl2563_probe, + .remove = tsl2563_remove, + .id_table = tsl2563_id, +}; +module_i2c_driver(tsl2563_i2c_driver); + +MODULE_AUTHOR("Nokia Corporation"); +MODULE_DESCRIPTION("tsl2563 light sensor driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c index e49cb9784a6f..2aa748fbdc0e 100644 --- a/drivers/iio/light/vcnl4000.c +++ b/drivers/iio/light/vcnl4000.c @@ -150,8 +150,8 @@ static const struct iio_info vcnl4000_info = { .driver_module = THIS_MODULE, }; -static int __devinit vcnl4000_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int vcnl4000_probe(struct i2c_client *client, + const struct i2c_device_id *id) { struct vcnl4000_data *data; struct iio_dev *indio_dev; @@ -190,7 +190,7 @@ error_free_dev: return ret; } -static int __devexit vcnl4000_remove(struct i2c_client *client) +static int vcnl4000_remove(struct i2c_client *client) { struct iio_dev *indio_dev = i2c_get_clientdata(client); @@ -206,7 +206,7 @@ static struct i2c_driver vcnl4000_driver = { .owner = THIS_MODULE, }, .probe = vcnl4000_probe, - .remove = __devexit_p(vcnl4000_remove), + .remove = vcnl4000_remove, .id_table = vcnl4000_id, }; diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig index c1f0cdd57037..cd29be54f643 100644 --- a/drivers/iio/magnetometer/Kconfig +++ b/drivers/iio/magnetometer/Kconfig @@ -8,9 +8,40 @@ config HID_SENSOR_MAGNETOMETER_3D select IIO_BUFFER select IIO_TRIGGERED_BUFFER select HID_SENSOR_IIO_COMMON + select HID_SENSOR_IIO_TRIGGER tristate "HID Magenetometer 3D" help Say yes here to build support for the HID SENSOR Magnetometer 3D. +config IIO_ST_MAGN_3AXIS + tristate "STMicroelectronics magnetometers 3-Axis Driver" + depends on (I2C || SPI_MASTER) && SYSFS + select IIO_ST_SENSORS_CORE + select IIO_ST_MAGN_I2C_3AXIS if (I2C) + select IIO_ST_MAGN_SPI_3AXIS if (SPI_MASTER) + select IIO_TRIGGERED_BUFFER if (IIO_BUFFER) + select IIO_ST_MAGN_BUFFER if (IIO_TRIGGERED_BUFFER) + help + Say yes here to build support for STMicroelectronics magnetometers: + LSM303DLHC, LSM303DLM, LIS3MDL. + + This driver can also be built as a module. If so, will be created + these modules: + - st_magn (core functions for the driver [it is mandatory]); + - st_magn_i2c (necessary for the I2C devices [optional*]); + - st_magn_spi (necessary for the SPI devices [optional*]); + + (*) one of these is necessary to do something. + +config IIO_ST_MAGN_I2C_3AXIS + tristate + depends on IIO_ST_MAGN_3AXIS + depends on IIO_ST_SENSORS_I2C + +config IIO_ST_MAGN_SPI_3AXIS + tristate + depends on IIO_ST_MAGN_3AXIS + depends on IIO_ST_SENSORS_SPI + endmenu diff --git a/drivers/iio/magnetometer/Makefile b/drivers/iio/magnetometer/Makefile index 60dc4f2b1963..e78672876dc2 100644 --- a/drivers/iio/magnetometer/Makefile +++ b/drivers/iio/magnetometer/Makefile @@ -3,3 +3,10 @@ # obj-$(CONFIG_HID_SENSOR_MAGNETOMETER_3D) += hid-sensor-magn-3d.o + +obj-$(CONFIG_IIO_ST_MAGN_3AXIS) += st_magn.o +st_magn-y := st_magn_core.o +st_magn-$(CONFIG_IIO_BUFFER) += st_magn_buffer.o + +obj-$(CONFIG_IIO_ST_MAGN_I2C_3AXIS) += st_magn_i2c.o +obj-$(CONFIG_IIO_ST_MAGN_SPI_3AXIS) += st_magn_spi.o diff --git a/drivers/iio/magnetometer/hid-sensor-magn-3d.c b/drivers/iio/magnetometer/hid-sensor-magn-3d.c index c4f0d274f577..d8d01265220b 100644 --- a/drivers/iio/magnetometer/hid-sensor-magn-3d.c +++ b/drivers/iio/magnetometer/hid-sensor-magn-3d.c @@ -28,7 +28,6 @@ #include <linux/iio/buffer.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> -#include "../common/hid-sensors/hid-sensor-attributes.h" #include "../common/hid-sensors/hid-sensor-trigger.h" /*Format: HID-SENSOR-usage_id_in_hex*/ @@ -44,7 +43,7 @@ enum magn_3d_channel { struct magn_3d_state { struct hid_sensor_hub_callbacks callbacks; - struct hid_sensor_iio_common common_attributes; + struct hid_sensor_common common_attributes; struct hid_sensor_hub_attribute_info magn[MAGN_3D_CHANNEL_MAX]; u32 magn_val[MAGN_3D_CHANNEL_MAX]; }; @@ -198,21 +197,8 @@ static const struct iio_info magn_3d_info = { /* Function to push data to buffer */ static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len) { - struct iio_buffer *buffer = indio_dev->buffer; - int datum_sz; - dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n"); - if (!buffer) { - dev_err(&indio_dev->dev, "Buffer == NULL\n"); - return; - } - datum_sz = buffer->access->get_bytes_per_datum(buffer); - if (len > datum_sz) { - dev_err(&indio_dev->dev, "Datum size mismatch %d:%d\n", len, - datum_sz); - return; - } - iio_push_to_buffer(buffer, (u8 *)data); + iio_push_to_buffers(indio_dev, (u8 *)data); } /* Callback handler to send event after all samples are received and captured */ @@ -292,7 +278,7 @@ static int magn_3d_parse_report(struct platform_device *pdev, } /* Function to initialize the processing for usage id */ -static int __devinit hid_magn_3d_probe(struct platform_device *pdev) +static int hid_magn_3d_probe(struct platform_device *pdev) { int ret = 0; static char *name = "magn_3d"; @@ -320,10 +306,10 @@ static int __devinit hid_magn_3d_probe(struct platform_device *pdev) goto error_free_dev; } - channels = kmemdup(magn_3d_channels, - sizeof(magn_3d_channels), - GFP_KERNEL); + channels = kmemdup(magn_3d_channels, sizeof(magn_3d_channels), + GFP_KERNEL); if (!channels) { + ret = -ENOMEM; dev_err(&pdev->dev, "failed to duplicate channels\n"); goto error_free_dev; } @@ -389,7 +375,7 @@ error_ret: } /* Function to deinitialize the processing for usage id */ -static int __devinit hid_magn_3d_remove(struct platform_device *pdev) +static int hid_magn_3d_remove(struct platform_device *pdev) { struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; struct iio_dev *indio_dev = platform_get_drvdata(pdev); diff --git a/drivers/iio/magnetometer/st_magn.h b/drivers/iio/magnetometer/st_magn.h new file mode 100644 index 000000000000..7e81d00ef0c3 --- /dev/null +++ b/drivers/iio/magnetometer/st_magn.h @@ -0,0 +1,45 @@ +/* + * STMicroelectronics magnetometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * v. 1.0.0 + * Licensed under the GPL-2. + */ + +#ifndef ST_MAGN_H +#define ST_MAGN_H + +#include <linux/types.h> +#include <linux/iio/common/st_sensors.h> + +#define LSM303DLHC_MAGN_DEV_NAME "lsm303dlhc_magn" +#define LSM303DLM_MAGN_DEV_NAME "lsm303dlm_magn" +#define LIS3MDL_MAGN_DEV_NAME "lis3mdl" + +int st_magn_common_probe(struct iio_dev *indio_dev); +void st_magn_common_remove(struct iio_dev *indio_dev); + +#ifdef CONFIG_IIO_BUFFER +int st_magn_allocate_ring(struct iio_dev *indio_dev); +void st_magn_deallocate_ring(struct iio_dev *indio_dev); +#else /* CONFIG_IIO_BUFFER */ +static inline int st_magn_probe_trigger(struct iio_dev *indio_dev, int irq) +{ + return 0; +} +static inline void st_magn_remove_trigger(struct iio_dev *indio_dev, int irq) +{ + return; +} +static inline int st_magn_allocate_ring(struct iio_dev *indio_dev) +{ + return 0; +} +static inline void st_magn_deallocate_ring(struct iio_dev *indio_dev) +{ +} +#endif /* CONFIG_IIO_BUFFER */ + +#endif /* ST_MAGN_H */ diff --git a/drivers/iio/magnetometer/st_magn_buffer.c b/drivers/iio/magnetometer/st_magn_buffer.c new file mode 100644 index 000000000000..708857bdb47d --- /dev/null +++ b/drivers/iio/magnetometer/st_magn_buffer.c @@ -0,0 +1,98 @@ +/* + * STMicroelectronics magnetometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/stat.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/delay.h> +#include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#include <linux/iio/common/st_sensors.h> +#include "st_magn.h" + +static int st_magn_buffer_preenable(struct iio_dev *indio_dev) +{ + int err; + + err = st_sensors_set_enable(indio_dev, true); + if (err < 0) + goto st_magn_set_enable_error; + + err = iio_sw_buffer_preenable(indio_dev); + +st_magn_set_enable_error: + return err; +} + +static int st_magn_buffer_postenable(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *mdata = iio_priv(indio_dev); + + mdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); + if (mdata->buffer_data == NULL) { + err = -ENOMEM; + goto allocate_memory_error; + } + + err = iio_triggered_buffer_postenable(indio_dev); + if (err < 0) + goto st_magn_buffer_postenable_error; + + return err; + +st_magn_buffer_postenable_error: + kfree(mdata->buffer_data); +allocate_memory_error: + return err; +} + +static int st_magn_buffer_predisable(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *mdata = iio_priv(indio_dev); + + err = iio_triggered_buffer_predisable(indio_dev); + if (err < 0) + goto st_magn_buffer_predisable_error; + + err = st_sensors_set_enable(indio_dev, false); + +st_magn_buffer_predisable_error: + kfree(mdata->buffer_data); + return err; +} + +static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = { + .preenable = &st_magn_buffer_preenable, + .postenable = &st_magn_buffer_postenable, + .predisable = &st_magn_buffer_predisable, +}; + +int st_magn_allocate_ring(struct iio_dev *indio_dev) +{ + return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + &st_sensors_trigger_handler, &st_magn_buffer_setup_ops); +} + +void st_magn_deallocate_ring(struct iio_dev *indio_dev) +{ + iio_triggered_buffer_cleanup(indio_dev); +} + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics magnetometers buffer"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c new file mode 100644 index 000000000000..16f0d6df239f --- /dev/null +++ b/drivers/iio/magnetometer/st_magn_core.c @@ -0,0 +1,400 @@ +/* + * STMicroelectronics magnetometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/types.h> +#include <linux/mutex.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/irq.h> +#include <linux/delay.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> + +#include <linux/iio/common/st_sensors.h> +#include "st_magn.h" + +/* DEFAULT VALUE FOR SENSORS */ +#define ST_MAGN_DEFAULT_OUT_X_L_ADDR 0X04 +#define ST_MAGN_DEFAULT_OUT_Y_L_ADDR 0X08 +#define ST_MAGN_DEFAULT_OUT_Z_L_ADDR 0X06 + +/* FULLSCALE */ +#define ST_MAGN_FS_AVL_1300MG 1300 +#define ST_MAGN_FS_AVL_1900MG 1900 +#define ST_MAGN_FS_AVL_2500MG 2500 +#define ST_MAGN_FS_AVL_4000MG 4000 +#define ST_MAGN_FS_AVL_4700MG 4700 +#define ST_MAGN_FS_AVL_5600MG 5600 +#define ST_MAGN_FS_AVL_8000MG 8000 +#define ST_MAGN_FS_AVL_8100MG 8100 +#define ST_MAGN_FS_AVL_10000MG 10000 + +/* CUSTOM VALUES FOR SENSOR 1 */ +#define ST_MAGN_1_WAI_EXP 0x3c +#define ST_MAGN_1_ODR_ADDR 0x00 +#define ST_MAGN_1_ODR_MASK 0x1c +#define ST_MAGN_1_ODR_AVL_1HZ_VAL 0x00 +#define ST_MAGN_1_ODR_AVL_2HZ_VAL 0x01 +#define ST_MAGN_1_ODR_AVL_3HZ_VAL 0x02 +#define ST_MAGN_1_ODR_AVL_8HZ_VAL 0x03 +#define ST_MAGN_1_ODR_AVL_15HZ_VAL 0x04 +#define ST_MAGN_1_ODR_AVL_30HZ_VAL 0x05 +#define ST_MAGN_1_ODR_AVL_75HZ_VAL 0x06 +#define ST_MAGN_1_ODR_AVL_220HZ_VAL 0x07 +#define ST_MAGN_1_PW_ADDR 0x02 +#define ST_MAGN_1_PW_MASK 0x03 +#define ST_MAGN_1_PW_ON 0x00 +#define ST_MAGN_1_PW_OFF 0x03 +#define ST_MAGN_1_FS_ADDR 0x01 +#define ST_MAGN_1_FS_MASK 0xe0 +#define ST_MAGN_1_FS_AVL_1300_VAL 0x01 +#define ST_MAGN_1_FS_AVL_1900_VAL 0x02 +#define ST_MAGN_1_FS_AVL_2500_VAL 0x03 +#define ST_MAGN_1_FS_AVL_4000_VAL 0x04 +#define ST_MAGN_1_FS_AVL_4700_VAL 0x05 +#define ST_MAGN_1_FS_AVL_5600_VAL 0x06 +#define ST_MAGN_1_FS_AVL_8100_VAL 0x07 +#define ST_MAGN_1_FS_AVL_1300_GAIN_XY 1100 +#define ST_MAGN_1_FS_AVL_1900_GAIN_XY 855 +#define ST_MAGN_1_FS_AVL_2500_GAIN_XY 670 +#define ST_MAGN_1_FS_AVL_4000_GAIN_XY 450 +#define ST_MAGN_1_FS_AVL_4700_GAIN_XY 400 +#define ST_MAGN_1_FS_AVL_5600_GAIN_XY 330 +#define ST_MAGN_1_FS_AVL_8100_GAIN_XY 230 +#define ST_MAGN_1_FS_AVL_1300_GAIN_Z 980 +#define ST_MAGN_1_FS_AVL_1900_GAIN_Z 760 +#define ST_MAGN_1_FS_AVL_2500_GAIN_Z 600 +#define ST_MAGN_1_FS_AVL_4000_GAIN_Z 400 +#define ST_MAGN_1_FS_AVL_4700_GAIN_Z 355 +#define ST_MAGN_1_FS_AVL_5600_GAIN_Z 295 +#define ST_MAGN_1_FS_AVL_8100_GAIN_Z 205 +#define ST_MAGN_1_MULTIREAD_BIT false + +/* CUSTOM VALUES FOR SENSOR 2 */ +#define ST_MAGN_2_WAI_EXP 0x3d +#define ST_MAGN_2_ODR_ADDR 0x20 +#define ST_MAGN_2_ODR_MASK 0x1c +#define ST_MAGN_2_ODR_AVL_1HZ_VAL 0x00 +#define ST_MAGN_2_ODR_AVL_2HZ_VAL 0x01 +#define ST_MAGN_2_ODR_AVL_3HZ_VAL 0x02 +#define ST_MAGN_2_ODR_AVL_5HZ_VAL 0x03 +#define ST_MAGN_2_ODR_AVL_10HZ_VAL 0x04 +#define ST_MAGN_2_ODR_AVL_20HZ_VAL 0x05 +#define ST_MAGN_2_ODR_AVL_40HZ_VAL 0x06 +#define ST_MAGN_2_ODR_AVL_80HZ_VAL 0x07 +#define ST_MAGN_2_PW_ADDR 0x22 +#define ST_MAGN_2_PW_MASK 0x03 +#define ST_MAGN_2_PW_ON 0x00 +#define ST_MAGN_2_PW_OFF 0x03 +#define ST_MAGN_2_FS_ADDR 0x21 +#define ST_MAGN_2_FS_MASK 0x60 +#define ST_MAGN_2_FS_AVL_4000_VAL 0x00 +#define ST_MAGN_2_FS_AVL_8000_VAL 0x01 +#define ST_MAGN_2_FS_AVL_10000_VAL 0x02 +#define ST_MAGN_2_FS_AVL_4000_GAIN 430 +#define ST_MAGN_2_FS_AVL_8000_GAIN 230 +#define ST_MAGN_2_FS_AVL_10000_GAIN 230 +#define ST_MAGN_2_MULTIREAD_BIT false +#define ST_MAGN_2_OUT_X_L_ADDR 0x28 +#define ST_MAGN_2_OUT_Y_L_ADDR 0x2a +#define ST_MAGN_2_OUT_Z_L_ADDR 0x2c + +static const struct iio_chan_spec st_magn_16bit_channels[] = { + ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_X, IIO_MOD_X, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_DEFAULT_OUT_X_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_Y, IIO_MOD_Y, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_DEFAULT_OUT_Y_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_Z, IIO_MOD_Z, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_DEFAULT_OUT_Z_L_ADDR), + IIO_CHAN_SOFT_TIMESTAMP(3) +}; + +static const struct iio_chan_spec st_magn_2_16bit_channels[] = { + ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_X, IIO_MOD_X, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_2_OUT_X_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_Y, IIO_MOD_Y, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_2_OUT_Y_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_Z, IIO_MOD_Z, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_2_OUT_Z_L_ADDR), + IIO_CHAN_SOFT_TIMESTAMP(3) +}; + +static const struct st_sensors st_magn_sensors[] = { + { + .wai = ST_MAGN_1_WAI_EXP, + .sensors_supported = { + [0] = LSM303DLHC_MAGN_DEV_NAME, + [1] = LSM303DLM_MAGN_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_magn_16bit_channels, + .odr = { + .addr = ST_MAGN_1_ODR_ADDR, + .mask = ST_MAGN_1_ODR_MASK, + .odr_avl = { + { 1, ST_MAGN_1_ODR_AVL_1HZ_VAL, }, + { 2, ST_MAGN_1_ODR_AVL_2HZ_VAL, }, + { 3, ST_MAGN_1_ODR_AVL_3HZ_VAL, }, + { 8, ST_MAGN_1_ODR_AVL_8HZ_VAL, }, + { 15, ST_MAGN_1_ODR_AVL_15HZ_VAL, }, + { 30, ST_MAGN_1_ODR_AVL_30HZ_VAL, }, + { 75, ST_MAGN_1_ODR_AVL_75HZ_VAL, }, + { 220, ST_MAGN_1_ODR_AVL_220HZ_VAL, }, + }, + }, + .pw = { + .addr = ST_MAGN_1_PW_ADDR, + .mask = ST_MAGN_1_PW_MASK, + .value_on = ST_MAGN_1_PW_ON, + .value_off = ST_MAGN_1_PW_OFF, + }, + .fs = { + .addr = ST_MAGN_1_FS_ADDR, + .mask = ST_MAGN_1_FS_MASK, + .fs_avl = { + [0] = { + .num = ST_MAGN_FS_AVL_1300MG, + .value = ST_MAGN_1_FS_AVL_1300_VAL, + .gain = ST_MAGN_1_FS_AVL_1300_GAIN_XY, + .gain2 = ST_MAGN_1_FS_AVL_1300_GAIN_Z, + }, + [1] = { + .num = ST_MAGN_FS_AVL_1900MG, + .value = ST_MAGN_1_FS_AVL_1900_VAL, + .gain = ST_MAGN_1_FS_AVL_1900_GAIN_XY, + .gain2 = ST_MAGN_1_FS_AVL_1900_GAIN_Z, + }, + [2] = { + .num = ST_MAGN_FS_AVL_2500MG, + .value = ST_MAGN_1_FS_AVL_2500_VAL, + .gain = ST_MAGN_1_FS_AVL_2500_GAIN_XY, + .gain2 = ST_MAGN_1_FS_AVL_2500_GAIN_Z, + }, + [3] = { + .num = ST_MAGN_FS_AVL_4000MG, + .value = ST_MAGN_1_FS_AVL_4000_VAL, + .gain = ST_MAGN_1_FS_AVL_4000_GAIN_XY, + .gain2 = ST_MAGN_1_FS_AVL_4000_GAIN_Z, + }, + [4] = { + .num = ST_MAGN_FS_AVL_4700MG, + .value = ST_MAGN_1_FS_AVL_4700_VAL, + .gain = ST_MAGN_1_FS_AVL_4700_GAIN_XY, + .gain2 = ST_MAGN_1_FS_AVL_4700_GAIN_Z, + }, + [5] = { + .num = ST_MAGN_FS_AVL_5600MG, + .value = ST_MAGN_1_FS_AVL_5600_VAL, + .gain = ST_MAGN_1_FS_AVL_5600_GAIN_XY, + .gain2 = ST_MAGN_1_FS_AVL_5600_GAIN_Z, + }, + [6] = { + .num = ST_MAGN_FS_AVL_8100MG, + .value = ST_MAGN_1_FS_AVL_8100_VAL, + .gain = ST_MAGN_1_FS_AVL_8100_GAIN_XY, + .gain2 = ST_MAGN_1_FS_AVL_8100_GAIN_Z, + }, + }, + }, + .multi_read_bit = ST_MAGN_1_MULTIREAD_BIT, + .bootime = 2, + }, + { + .wai = ST_MAGN_2_WAI_EXP, + .sensors_supported = { + [0] = LIS3MDL_MAGN_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_magn_2_16bit_channels, + .odr = { + .addr = ST_MAGN_2_ODR_ADDR, + .mask = ST_MAGN_2_ODR_MASK, + .odr_avl = { + { 1, ST_MAGN_2_ODR_AVL_1HZ_VAL, }, + { 2, ST_MAGN_2_ODR_AVL_2HZ_VAL, }, + { 3, ST_MAGN_2_ODR_AVL_3HZ_VAL, }, + { 5, ST_MAGN_2_ODR_AVL_5HZ_VAL, }, + { 10, ST_MAGN_2_ODR_AVL_10HZ_VAL, }, + { 20, ST_MAGN_2_ODR_AVL_20HZ_VAL, }, + { 40, ST_MAGN_2_ODR_AVL_40HZ_VAL, }, + { 80, ST_MAGN_2_ODR_AVL_80HZ_VAL, }, + }, + }, + .pw = { + .addr = ST_MAGN_2_PW_ADDR, + .mask = ST_MAGN_2_PW_MASK, + .value_on = ST_MAGN_2_PW_ON, + .value_off = ST_MAGN_2_PW_OFF, + }, + .fs = { + .addr = ST_MAGN_2_FS_ADDR, + .mask = ST_MAGN_2_FS_MASK, + .fs_avl = { + [0] = { + .num = ST_MAGN_FS_AVL_4000MG, + .value = ST_MAGN_2_FS_AVL_4000_VAL, + .gain = ST_MAGN_2_FS_AVL_4000_GAIN, + }, + [1] = { + .num = ST_MAGN_FS_AVL_8000MG, + .value = ST_MAGN_2_FS_AVL_8000_VAL, + .gain = ST_MAGN_2_FS_AVL_8000_GAIN, + }, + [2] = { + .num = ST_MAGN_FS_AVL_10000MG, + .value = ST_MAGN_2_FS_AVL_10000_VAL, + .gain = ST_MAGN_2_FS_AVL_10000_GAIN, + }, + }, + }, + .multi_read_bit = ST_MAGN_2_MULTIREAD_BIT, + .bootime = 2, + }, +}; + +static int st_magn_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *ch, int *val, + int *val2, long mask) +{ + int err; + struct st_sensor_data *mdata = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + err = st_sensors_read_info_raw(indio_dev, ch, val); + if (err < 0) + goto read_error; + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = 0; + if ((ch->scan_index == ST_SENSORS_SCAN_Z) && + (mdata->current_fullscale->gain2 != 0)) + *val2 = mdata->current_fullscale->gain2; + else + *val2 = mdata->current_fullscale->gain; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + +read_error: + return err; +} + +static int st_magn_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long mask) +{ + int err; + + switch (mask) { + case IIO_CHAN_INFO_SCALE: + err = st_sensors_set_fullscale_by_gain(indio_dev, val2); + break; + default: + err = -EINVAL; + } + + return err; +} + +static ST_SENSOR_DEV_ATTR_SAMP_FREQ(); +static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL(); +static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_magn_scale_available); + +static struct attribute *st_magn_attributes[] = { + &iio_dev_attr_sampling_frequency_available.dev_attr.attr, + &iio_dev_attr_in_magn_scale_available.dev_attr.attr, + &iio_dev_attr_sampling_frequency.dev_attr.attr, + NULL, +}; + +static const struct attribute_group st_magn_attribute_group = { + .attrs = st_magn_attributes, +}; + +static const struct iio_info magn_info = { + .driver_module = THIS_MODULE, + .attrs = &st_magn_attribute_group, + .read_raw = &st_magn_read_raw, + .write_raw = &st_magn_write_raw, +}; + +int st_magn_common_probe(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *mdata = iio_priv(indio_dev); + + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &magn_info; + + err = st_sensors_check_device_support(indio_dev, + ARRAY_SIZE(st_magn_sensors), st_magn_sensors); + if (err < 0) + goto st_magn_common_probe_error; + + mdata->multiread_bit = mdata->sensor->multi_read_bit; + indio_dev->channels = mdata->sensor->ch; + indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; + + mdata->current_fullscale = (struct st_sensor_fullscale_avl *) + &mdata->sensor->fs.fs_avl[0]; + mdata->odr = mdata->sensor->odr.odr_avl[0].hz; + + err = st_sensors_init_sensor(indio_dev); + if (err < 0) + goto st_magn_common_probe_error; + + if (mdata->get_irq_data_ready(indio_dev) > 0) { + err = st_magn_allocate_ring(indio_dev); + if (err < 0) + goto st_magn_common_probe_error; + err = st_sensors_allocate_trigger(indio_dev, NULL); + if (err < 0) + goto st_magn_probe_trigger_error; + } + + err = iio_device_register(indio_dev); + if (err) + goto st_magn_device_register_error; + + return err; + +st_magn_device_register_error: + if (mdata->get_irq_data_ready(indio_dev) > 0) + st_sensors_deallocate_trigger(indio_dev); +st_magn_probe_trigger_error: + if (mdata->get_irq_data_ready(indio_dev) > 0) + st_magn_deallocate_ring(indio_dev); +st_magn_common_probe_error: + return err; +} +EXPORT_SYMBOL(st_magn_common_probe); + +void st_magn_common_remove(struct iio_dev *indio_dev) +{ + struct st_sensor_data *mdata = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + if (mdata->get_irq_data_ready(indio_dev) > 0) { + st_sensors_deallocate_trigger(indio_dev); + st_magn_deallocate_ring(indio_dev); + } + iio_device_free(indio_dev); +} +EXPORT_SYMBOL(st_magn_common_remove); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics magnetometers driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/magnetometer/st_magn_i2c.c b/drivers/iio/magnetometer/st_magn_i2c.c new file mode 100644 index 000000000000..e6adc4a86425 --- /dev/null +++ b/drivers/iio/magnetometer/st_magn_i2c.c @@ -0,0 +1,80 @@ +/* + * STMicroelectronics magnetometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/iio/iio.h> + +#include <linux/iio/common/st_sensors.h> +#include <linux/iio/common/st_sensors_i2c.h> +#include "st_magn.h" + +static int st_magn_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct iio_dev *indio_dev; + struct st_sensor_data *mdata; + int err; + + indio_dev = iio_device_alloc(sizeof(*mdata)); + if (indio_dev == NULL) { + err = -ENOMEM; + goto iio_device_alloc_error; + } + + mdata = iio_priv(indio_dev); + mdata->dev = &client->dev; + + st_sensors_i2c_configure(indio_dev, client, mdata); + + err = st_magn_common_probe(indio_dev); + if (err < 0) + goto st_magn_common_probe_error; + + return 0; + +st_magn_common_probe_error: + iio_device_free(indio_dev); +iio_device_alloc_error: + return err; +} + +static int st_magn_i2c_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + st_magn_common_remove(indio_dev); + + return 0; +} + +static const struct i2c_device_id st_magn_id_table[] = { + { LSM303DLHC_MAGN_DEV_NAME }, + { LSM303DLM_MAGN_DEV_NAME }, + { LIS3MDL_MAGN_DEV_NAME }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, st_magn_id_table); + +static struct i2c_driver st_magn_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "st-magn-i2c", + }, + .probe = st_magn_i2c_probe, + .remove = st_magn_i2c_remove, + .id_table = st_magn_id_table, +}; +module_i2c_driver(st_magn_driver); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/magnetometer/st_magn_spi.c b/drivers/iio/magnetometer/st_magn_spi.c new file mode 100644 index 000000000000..51adb797cb7d --- /dev/null +++ b/drivers/iio/magnetometer/st_magn_spi.c @@ -0,0 +1,79 @@ +/* + * STMicroelectronics magnetometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/spi/spi.h> +#include <linux/iio/iio.h> + +#include <linux/iio/common/st_sensors.h> +#include <linux/iio/common/st_sensors_spi.h> +#include "st_magn.h" + +static int st_magn_spi_probe(struct spi_device *spi) +{ + struct iio_dev *indio_dev; + struct st_sensor_data *mdata; + int err; + + indio_dev = iio_device_alloc(sizeof(*mdata)); + if (indio_dev == NULL) { + err = -ENOMEM; + goto iio_device_alloc_error; + } + + mdata = iio_priv(indio_dev); + mdata->dev = &spi->dev; + + st_sensors_spi_configure(indio_dev, spi, mdata); + + err = st_magn_common_probe(indio_dev); + if (err < 0) + goto st_magn_common_probe_error; + + return 0; + +st_magn_common_probe_error: + iio_device_free(indio_dev); +iio_device_alloc_error: + return err; +} + +static int st_magn_spi_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + st_magn_common_remove(indio_dev); + + return 0; +} + +static const struct spi_device_id st_magn_id_table[] = { + { LSM303DLHC_MAGN_DEV_NAME }, + { LSM303DLM_MAGN_DEV_NAME }, + { LIS3MDL_MAGN_DEV_NAME }, + {}, +}; +MODULE_DEVICE_TABLE(spi, st_magn_id_table); + +static struct spi_driver st_magn_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "st-magn-spi", + }, + .probe = st_magn_spi_probe, + .remove = st_magn_spi_remove, + .id_table = st_magn_id_table, +}; +module_spi_driver(st_magn_driver); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver"); +MODULE_LICENSE("GPL v2"); |