diff options
Diffstat (limited to 'drivers/mmc/card/unifi_fs/fs_lx.c')
| -rw-r--r-- | drivers/mmc/card/unifi_fs/fs_lx.c | 683 |
1 files changed, 683 insertions, 0 deletions
diff --git a/drivers/mmc/card/unifi_fs/fs_lx.c b/drivers/mmc/card/unifi_fs/fs_lx.c new file mode 100644 index 000000000000..d449e6c13258 --- /dev/null +++ b/drivers/mmc/card/unifi_fs/fs_lx.c @@ -0,0 +1,683 @@ +/* + * fs_lx.c - Freescale SDIO glue module for UniFi. + * + * Copyright (C) 2008 Cambridge Silicon Radio Ltd. + * + * Important: + * This module does not support more than one device driver instances. + * + */ +/* + * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ +#include <linux/version.h> +#include <linux/module.h> +#include <linux/delay.h> + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> + +#include <linux/scatterlist.h> + +#include <linux/mmc/core.h> +#include <linux/mmc/card.h> +#include <linux/mmc/sdio.h> +#include <linux/mmc/sdio_func.h> +#include <linux/mmc/sdio_ids.h> + +#include <linux/clk.h> +#include <linux/err.h> + +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/fsl_devices.h> + +#include <mach/mmc.h> +#include <mach/gpio.h> + +#include "fs_sdio_api.h" + +struct regulator_unifi { + struct regulator *reg_gpo1; + struct regulator *reg_gpo2; + struct regulator *reg_1v5_ana_bb; + struct regulator *reg_vdd_vpa; + struct regulator *reg_1v5_dd; +}; + +static struct sdio_driver sdio_unifi_driver; + +static int fs_sdio_probe(struct sdio_func *func, + const struct sdio_device_id *id); +static void fs_sdio_remove(struct sdio_func *func); +static void fs_sdio_irq(struct sdio_func *func); +static int fs_sdio_suspend(struct device *dev, pm_message_t state); +static int fs_sdio_resume(struct device *dev); + +/* Globals to store the context to this module and the device driver */ +static struct sdio_dev *available_sdio_dev; +static struct fs_driver *available_driver; +struct mxc_unifi_platform_data *plat_data; + +extern void mxc_mmc_force_detect(int id); + +enum sdio_cmd_direction { + CMD_READ, + CMD_WRITE, +}; + +static int fsl_io_rw_direct(struct mmc_card *card, int write, unsigned fn, + unsigned addr, u8 in, u8 *out) +{ + struct mmc_command cmd; + int err; + + BUG_ON(!card); + BUG_ON(fn > 7); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_IO_RW_DIRECT; + cmd.arg = write ? 0x80000000 : 0x00000000; + cmd.arg |= fn << 28; + cmd.arg |= (write && out) ? 0x08000000 : 0x00000000; + cmd.arg |= addr << 9; + cmd.arg |= in; + cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC; + + err = mmc_wait_for_cmd(card->host, &cmd, 0); + if (err) + return err; + + if (mmc_host_is_spi(card->host)) { + /* host driver already reported errors */ + } else { + if (cmd.resp[0] & R5_ERROR) + return -EIO; + if (cmd.resp[0] & R5_FUNCTION_NUMBER) + return -EINVAL; + if (cmd.resp[0] & R5_OUT_OF_RANGE) + return -ERANGE; + } + + if (out) { + if (mmc_host_is_spi(card->host)) + *out = (cmd.resp[0] >> 8) & 0xFF; + else + *out = cmd.resp[0] & 0xFF; + } + + return 0; +} + + +int fs_sdio_readb(struct sdio_dev *fdev, int funcnum, unsigned long addr, + unsigned char *pdata) +{ + int err; + char val; + + sdio_claim_host(fdev->func); + if (funcnum == 0) + val = sdio_f0_readb(fdev->func, (unsigned int)addr, &err); + else + val = sdio_readb(fdev->func, (unsigned int)addr, &err); + sdio_release_host(fdev->func); + if (!err) + *pdata = val; + else + printk(KERN_ERR "fs_lx: readb error,fun=%d,addr=%d,data=%d," + "err=%d\n", funcnum, (int)addr, *pdata, err); + + return err; +} +EXPORT_SYMBOL(fs_sdio_readb); + +int fs_sdio_writeb(struct sdio_dev *fdev, int funcnum, unsigned long addr, + unsigned char data) +{ + int err; + + sdio_claim_host(fdev->func); + if (funcnum == 0) + err = fsl_io_rw_direct(fdev->func->card, 1, 0, addr, + data, NULL); + else + sdio_writeb(fdev->func, data, (unsigned int)addr, &err); + sdio_release_host(fdev->func); + + if (err) + printk(KERN_ERR "fs_lx: writeb error,fun=%d,addr=%d,data=%d," + "err=%d\n", funcnum, (int)addr, data, err); + return err; +} +EXPORT_SYMBOL(fs_sdio_writeb); + +int fs_sdio_block_rw(struct sdio_dev *fdev, int funcnum, unsigned long addr, + unsigned char *pdata, unsigned int count, int direction) +{ + int err; + + sdio_claim_host(fdev->func); + if (direction == CMD_READ) + err = sdio_memcpy_fromio(fdev->func, pdata, addr, count); + else + err = sdio_memcpy_toio(fdev->func, addr, pdata, count); + sdio_release_host(fdev->func); + + return err; +} +EXPORT_SYMBOL(fs_sdio_block_rw); + +int fs_sdio_enable_interrupt(struct sdio_dev *fdev, int enable) +{ + struct mmc_host *host = fdev->func->card->host; + unsigned long flags; + + spin_lock_irqsave(&fdev->lock, flags); + if (enable) { + if (!fdev->int_enabled) { + fdev->int_enabled = 1; + host->ops->enable_sdio_irq(host, 1); + } + } else { + if (fdev->int_enabled) { + host->ops->enable_sdio_irq(host, 0); + fdev->int_enabled = 0; + } + } + spin_unlock_irqrestore(&fdev->lock, flags); + + return 0; +} +EXPORT_SYMBOL(fs_sdio_enable_interrupt); + +int fs_sdio_disable(struct sdio_dev *fdev) +{ + int err; + sdio_claim_host(fdev->func); + err = sdio_disable_func(fdev->func); + sdio_release_host(fdev->func); + if (err) + printk(KERN_ERR "fs_lx:fs_sdio_disable error,err=%d\n", err); + return err; +} +EXPORT_SYMBOL(fs_sdio_disable); + +int fs_sdio_enable(struct sdio_dev *fdev) +{ + int err = 0; + + sdio_claim_host(fdev->func); + err = sdio_disable_func(fdev->func); + err = sdio_enable_func(fdev->func); + sdio_release_host(fdev->func); + if (err) + printk(KERN_ERR "fs_lx:fs_sdio_enable error,err=%d\n", err); + return err; +} +EXPORT_SYMBOL(fs_sdio_enable); + +int fs_sdio_set_max_clock_speed(struct sdio_dev *fdev, int max_khz) +{ + struct mmc_card *card = fdev->func->card; + + /* Respect the host controller's min-max. */ + max_khz *= 1000; + if (max_khz < card->host->f_min) + max_khz = card->host->f_min; + if (max_khz > card->host->f_max) + max_khz = card->host->f_max; + + card->host->ios.clock = max_khz; + card->host->ops->set_ios(card->host, &card->host->ios); + + return max_khz / 1000; +} +EXPORT_SYMBOL(fs_sdio_set_max_clock_speed); + +int fs_sdio_set_block_size(struct sdio_dev *fdev, int blksz) +{ + return 0; +} +EXPORT_SYMBOL(fs_sdio_set_block_size); + +/* + * --------------------------------------------------------------------------- + * + * Turn on the power of WIFI card + * + * --------------------------------------------------------------------------- + */ +static void fs_unifi_power_on(void) +{ + struct regulator_unifi *reg_unifi; + unsigned int tmp; + + reg_unifi = plat_data->priv; + + if (reg_unifi->reg_gpo1) + regulator_enable(reg_unifi->reg_gpo1); + if (reg_unifi->reg_gpo2) + regulator_enable(reg_unifi->reg_gpo2); + + if (plat_data->enable) + plat_data->enable(1); + + if (reg_unifi->reg_1v5_ana_bb) { + regulator_set_voltage(reg_unifi->reg_1v5_ana_bb, + 1500000, 1500000); + regulator_enable(reg_unifi->reg_1v5_ana_bb); + } + if (reg_unifi->reg_vdd_vpa) { + tmp = regulator_get_voltage(reg_unifi->reg_vdd_vpa); + if (tmp < 3000000 || tmp > 3600000) + regulator_set_voltage(reg_unifi->reg_vdd_vpa, + 3000000, 3000000); + regulator_enable(reg_unifi->reg_vdd_vpa); + } + /* WL_1V5DD should come on last, 10ms after other supplies */ + msleep(10); + if (reg_unifi->reg_1v5_dd) { + regulator_set_voltage(reg_unifi->reg_1v5_dd, + 1500000, 1500000); + regulator_enable(reg_unifi->reg_1v5_dd); + } + msleep(10); +} + +/* + * --------------------------------------------------------------------------- + * + * Turn off the power of WIFI card + * + * --------------------------------------------------------------------------- + */ +static void fs_unifi_power_off(void) +{ + struct regulator_unifi *reg_unifi; + + reg_unifi = plat_data->priv; + if (reg_unifi->reg_1v5_dd) + regulator_disable(reg_unifi->reg_1v5_dd); + if (reg_unifi->reg_vdd_vpa) + regulator_disable(reg_unifi->reg_vdd_vpa); + + if (reg_unifi->reg_1v5_ana_bb) + regulator_disable(reg_unifi->reg_1v5_ana_bb); + + if (plat_data->enable) + plat_data->enable(0); + + if (reg_unifi->reg_gpo2) + regulator_disable(reg_unifi->reg_gpo2); + + if (reg_unifi->reg_gpo1) + regulator_disable(reg_unifi->reg_gpo1); +} + +/* This should be made conditional on being slot 2 too - so we can + * use a plug in card in slot 1 + */ +int fs_sdio_hard_reset(struct sdio_dev *fdev) +{ + return 0; +} +EXPORT_SYMBOL(fs_sdio_hard_reset); + +static const struct sdio_device_id fs_sdio_ids[] = { + {SDIO_DEVICE(0x032a, 0x0001)}, + { /* end: all zeroes */ }, +}; + +static struct sdio_driver sdio_unifi_driver = { + .name = "fs_unifi", + .probe = fs_sdio_probe, + .remove = fs_sdio_remove, + .id_table = fs_sdio_ids, + .drv = { + .suspend = fs_sdio_suspend, + .resume = fs_sdio_resume, + } +}; + +int fs_sdio_register_driver(struct fs_driver *driver) +{ + int ret, retry; + + /* Switch us on, sdio device may exist if power is on by default. */ + plat_data->hardreset(0); + if (available_sdio_dev) + mxc_mmc_force_detect(plat_data->host_id); + /* Wait for card removed */ + for (retry = 0; retry < 100; retry++) { + if (!available_sdio_dev) + break; + msleep(100); + } + if (retry == 100) + printk(KERN_ERR "fs_sdio_register_driver: sdio device exists, " + "timeout for card removed"); + fs_unifi_power_on(); + plat_data->hardreset(1); + msleep(500); + mxc_mmc_force_detect(plat_data->host_id); + for (retry = 0; retry < 100; retry++) { + if (available_sdio_dev) + break; + msleep(50); + } + if (retry == 100) + printk(KERN_ERR "fs_sdio_register_driver: Timeout waiting" + " for card added\n"); + /* Store the context to the device driver to the global */ + available_driver = driver; + + /* + * If available_sdio_dev is not NULL, probe has been called, + * so pass the probe to the registered driver + */ + if (available_sdio_dev) { + /* Store the context to the new device driver */ + available_sdio_dev->driver = driver; + + printk(KERN_INFO "fs_sdio_register_driver: Glue exists, add " + "device driver and register IRQ\n"); + driver->probe(available_sdio_dev); + + /* Register the IRQ handler to the SDIO IRQ. */ + sdio_claim_host(available_sdio_dev->func); + ret = sdio_claim_irq(available_sdio_dev->func, fs_sdio_irq); + sdio_release_host(available_sdio_dev->func); + if (ret) + return ret; + } + + return 0; +} +EXPORT_SYMBOL(fs_sdio_register_driver); + +void fs_sdio_unregister_driver(struct fs_driver *driver) +{ + /* + * If available_sdio_dev is not NULL, probe has been called, + * so pass the remove to the registered driver to clean up. + */ + if (available_sdio_dev) { + struct mmc_host *host = available_sdio_dev->func->card->host; + + printk(KERN_INFO "fs_sdio_unregister_driver: Glue exists, " + "unregister IRQ and remove device driver\n"); + + /* Unregister the IRQ handler first. */ + sdio_claim_host(available_sdio_dev->func); + sdio_release_irq(available_sdio_dev->func); + sdio_release_host(available_sdio_dev->func); + + driver->remove(available_sdio_dev); + + if (!available_sdio_dev->int_enabled) { + available_sdio_dev->int_enabled = 1; + host->ops->enable_sdio_irq(host, 1); + } + + /* Invalidate the context to the device driver */ + available_sdio_dev->driver = NULL; + } + + /* invalidate the context to the device driver to the global */ + available_driver = NULL; + /* Power down the UniFi */ + fs_unifi_power_off(); + +} +EXPORT_SYMBOL(fs_sdio_unregister_driver); + +static void fs_sdio_irq(struct sdio_func *func) +{ + struct sdio_dev *fdev = (struct sdio_dev *)sdio_get_drvdata(func); + if (fdev->driver) { + if (fdev->driver->card_int_handler) + fdev->driver->card_int_handler(fdev); + } +} + +#ifdef CONFIG_PM +static int fs_sdio_suspend(struct device *dev, pm_message_t state) +{ + struct sdio_dev *fdev = available_sdio_dev; + + /* Pass event to the registered driver. */ + if (fdev->driver) + if (fdev->driver->suspend) + fdev->driver->suspend(fdev, state); + + return 0; +} + +static int fs_sdio_resume(struct device *dev) +{ + struct sdio_dev *fdev = available_sdio_dev; + + /* Pass event to the registered driver. */ + if (fdev->driver) + if (fdev->driver->resume) + fdev->driver->resume(fdev); + + return 0; +} +#else +#define fs_sdio_suspend NULL +#define fs_sdio_resume NULL +#endif + +static int fs_sdio_probe(struct sdio_func *func, + const struct sdio_device_id *id) +{ + struct sdio_dev *fdev; + + /* Allocate our private context */ + fdev = kmalloc(sizeof(struct sdio_dev), GFP_KERNEL); + if (!fdev) + return -ENOMEM; + available_sdio_dev = fdev; + memset(fdev, 0, sizeof(struct sdio_dev)); + fdev->func = func; + fdev->vendor_id = id->vendor; + fdev->device_id = id->device; + fdev->max_blocksize = func->max_blksize; + fdev->int_enabled = 1; + spin_lock_init(&fdev->lock); + + /* Store our context in the MMC driver */ + printk(KERN_INFO "fs_sdio_probe: Add glue driver\n"); + sdio_set_drvdata(func, fdev); + + return 0; +} + +static void fs_sdio_remove(struct sdio_func *func) +{ + struct sdio_dev *fdev = (struct sdio_dev *)sdio_get_drvdata(func); + struct mmc_host *host = func->card->host; + + /* If there is a registered device driver, pass on the remove */ + if (fdev->driver) { + printk(KERN_INFO "fs_sdio_remove: Free IRQ and remove device " + "driver\n"); + /* Unregister the IRQ handler first. */ + sdio_claim_host(fdev->func); + sdio_release_irq(func); + sdio_release_host(fdev->func); + + fdev->driver->remove(fdev); + + if (!fdev->int_enabled) { + fdev->int_enabled = 1; + host->ops->enable_sdio_irq(host, 1); + } + } + + /* Unregister the card context from the MMC driver. */ + sdio_set_drvdata(func, NULL); + + /* Invalidate the global to our context. */ + available_sdio_dev = NULL; + kfree(fdev); +} + +static int fs_unifi_init(void) +{ + struct regulator_unifi *reg_unifi; + struct regulator *reg; + int err = 0; + + plat_data = get_unifi_plat_data(); + + if (!plat_data) + return -ENOENT; + + reg_unifi = kzalloc(sizeof(struct regulator_unifi), GFP_KERNEL); + if (!reg_unifi) + return -ENOMEM; + + if (plat_data->reg_gpo1) { + reg = regulator_get(NULL, plat_data->reg_gpo1); + if (!IS_ERR(reg)) + reg_unifi->reg_gpo1 = reg; + else { + err = -EINVAL; + goto err_reg_gpo1; + } + } + + if (plat_data->reg_gpo2) { + reg = regulator_get(NULL, plat_data->reg_gpo2); + if (!IS_ERR(reg)) + reg_unifi->reg_gpo2 = reg; + else { + err = -EINVAL; + goto err_reg_gpo2; + } + } + + if (plat_data->reg_1v5_ana_bb) { + reg = regulator_get(NULL, plat_data->reg_1v5_ana_bb); + if (!IS_ERR(reg)) + reg_unifi->reg_1v5_ana_bb = reg; + else { + err = -EINVAL; + goto err_reg_1v5_ana_bb; + } + } + + if (plat_data->reg_vdd_vpa) { + reg = regulator_get(NULL, plat_data->reg_vdd_vpa); + if (!IS_ERR(reg)) + reg_unifi->reg_vdd_vpa = reg; + else { + err = -EINVAL; + goto err_reg_vdd_vpa; + } + } + + if (plat_data->reg_1v5_dd) { + reg = regulator_get(NULL, plat_data->reg_1v5_dd); + if (!IS_ERR(reg)) + reg_unifi->reg_1v5_dd = reg; + else { + err = -EINVAL; + goto err_reg_1v5_dd; + } + } + plat_data->priv = reg_unifi; + return 0; + +err_reg_1v5_dd: + if (reg_unifi->reg_vdd_vpa) + regulator_put(reg_unifi->reg_vdd_vpa); +err_reg_vdd_vpa: + if (reg_unifi->reg_1v5_ana_bb) + regulator_put(reg_unifi->reg_1v5_ana_bb); +err_reg_1v5_ana_bb: + if (reg_unifi->reg_gpo2) + regulator_put(reg_unifi->reg_gpo2); +err_reg_gpo2: + if (reg_unifi->reg_gpo1) + regulator_put(reg_unifi->reg_gpo1); +err_reg_gpo1: + kfree(reg_unifi); + return err; +} + +int fs_unifi_remove(void) +{ + struct regulator_unifi *reg_unifi; + + reg_unifi = plat_data->priv; + plat_data->priv = NULL; + + if (reg_unifi->reg_1v5_dd) + regulator_put(reg_unifi->reg_1v5_dd); + if (reg_unifi->reg_vdd_vpa) + regulator_put(reg_unifi->reg_vdd_vpa); + + if (reg_unifi->reg_1v5_ana_bb) + regulator_put(reg_unifi->reg_1v5_ana_bb); + + if (reg_unifi->reg_gpo2) + regulator_put(reg_unifi->reg_gpo2); + + if (reg_unifi->reg_gpo1) + regulator_put(reg_unifi->reg_gpo1); + + kfree(reg_unifi); + return 0; +} + +/* Module init and exit, register and unregister to the SDIO/MMC driver */ +static int __init fs_sdio_init(void) +{ + int err; + + printk(KERN_INFO "Freescale: Register to MMC/SDIO driver\n"); + /* Sleep a bit - otherwise if the mmc subsystem has just started, it + * will allow us to register, then immediatly remove us! + */ + msleep(10); + err = fs_unifi_init(); + if (err) { + printk(KERN_ERR "Error: fs_unifi_init failed!\n"); + return err; + } + err = sdio_register_driver(&sdio_unifi_driver); + if (err) { + printk(KERN_ERR "Error: register sdio_unifi_driver failed!\n"); + fs_unifi_remove(); + } + return err; +} + +module_init(fs_sdio_init); + +static void __exit fs_sdio_exit(void) +{ + printk(KERN_INFO "Freescale: Unregister from MMC/SDIO driver\n"); + sdio_unregister_driver(&sdio_unifi_driver); + fs_unifi_remove(); +} + +module_exit(fs_sdio_exit); + +MODULE_DESCRIPTION("Freescale SDIO glue driver"); +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_LICENSE("GPL"); |