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path: root/drivers/media/rc/winbond-cir.c
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Diffstat (limited to 'drivers/media/rc/winbond-cir.c')
-rw-r--r--drivers/media/rc/winbond-cir.c138
1 files changed, 109 insertions, 29 deletions
diff --git a/drivers/media/rc/winbond-cir.c b/drivers/media/rc/winbond-cir.c
index 7c9b5f33113b..535a18dccbd0 100644
--- a/drivers/media/rc/winbond-cir.c
+++ b/drivers/media/rc/winbond-cir.c
@@ -7,6 +7,7 @@
* with minor modifications.
*
* Original Author: David Härdeman <david@hardeman.nu>
+ * Copyright (C) 2012 Sean Young <sean@mess.org>
* Copyright (C) 2009 - 2011 David Härdeman <david@hardeman.nu>
*
* Dedicated to my daughter Matilda, without whose loving attention this
@@ -22,9 +23,7 @@
* o IR Receive
* o IR Transmit
* o Wake-On-CIR functionality
- *
- * To do:
- * o Learning
+ * o Carrier detection
*
* 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
@@ -149,6 +148,14 @@
#define WBCIR_REGSEL_MASK 0x20
/* Starting address of selected register in WBCIR_REG_WCEIR_INDEX */
#define WBCIR_REG_ADDR0 0x00
+/* Enable carrier counter */
+#define WBCIR_CNTR_EN 0x01
+/* Reset carrier counter */
+#define WBCIR_CNTR_R 0x02
+/* Invert TX */
+#define WBCIR_IRTX_INV 0x04
+/* Receiver oversampling */
+#define WBCIR_RX_T_OV 0x40
/* Valid banks for the SP3 UART */
enum wbcir_bank {
@@ -184,7 +191,7 @@ enum wbcir_txstate {
};
/* Misc */
-#define WBCIR_NAME "winbond-cir"
+#define WBCIR_NAME "Winbond CIR"
#define WBCIR_ID_FAMILY 0xF1 /* Family ID for the WPCD376I */
#define WBCIR_ID_CHIP 0x04 /* Chip ID for the WPCD376I */
#define INVALID_SCANCODE 0x7FFFFFFF /* Invalid with all protos */
@@ -207,7 +214,8 @@ struct wbcir_data {
/* RX state */
enum wbcir_rxstate rxstate;
struct led_trigger *rxtrigger;
- struct ir_raw_event rxev;
+ int carrier_report_enabled;
+ u32 pulse_duration;
/* TX state */
enum wbcir_txstate txstate;
@@ -330,6 +338,30 @@ wbcir_to_rc6cells(u8 val)
*****************************************************************************/
static void
+wbcir_carrier_report(struct wbcir_data *data)
+{
+ unsigned counter = inb(data->ebase + WBCIR_REG_ECEIR_CNT_LO) |
+ inb(data->ebase + WBCIR_REG_ECEIR_CNT_HI) << 8;
+
+ if (counter > 0 && counter < 0xffff) {
+ DEFINE_IR_RAW_EVENT(ev);
+
+ ev.carrier_report = 1;
+ ev.carrier = DIV_ROUND_CLOSEST(counter * 1000000u,
+ data->pulse_duration);
+
+ ir_raw_event_store(data->dev, &ev);
+ }
+
+ /* reset and restart the counter */
+ data->pulse_duration = 0;
+ wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CCTL, WBCIR_CNTR_R,
+ WBCIR_CNTR_EN | WBCIR_CNTR_R);
+ wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CCTL, WBCIR_CNTR_EN,
+ WBCIR_CNTR_EN | WBCIR_CNTR_R);
+}
+
+static void
wbcir_idle_rx(struct rc_dev *dev, bool idle)
{
struct wbcir_data *data = dev->priv;
@@ -339,9 +371,16 @@ wbcir_idle_rx(struct rc_dev *dev, bool idle)
led_trigger_event(data->rxtrigger, LED_FULL);
}
- if (idle && data->rxstate != WBCIR_RXSTATE_INACTIVE)
+ if (idle && data->rxstate != WBCIR_RXSTATE_INACTIVE) {
+ data->rxstate = WBCIR_RXSTATE_INACTIVE;
+ led_trigger_event(data->rxtrigger, LED_OFF);
+
+ if (data->carrier_report_enabled)
+ wbcir_carrier_report(data);
+
/* Tell hardware to go idle by setting RXINACTIVE */
outb(WBCIR_RX_DISABLE, data->sbase + WBCIR_REG_SP3_ASCR);
+ }
}
static void
@@ -349,21 +388,23 @@ wbcir_irq_rx(struct wbcir_data *data, struct pnp_dev *device)
{
u8 irdata;
DEFINE_IR_RAW_EVENT(rawir);
+ unsigned duration;
/* Since RXHDLEV is set, at least 8 bytes are in the FIFO */
while (inb(data->sbase + WBCIR_REG_SP3_LSR) & WBCIR_RX_AVAIL) {
irdata = inb(data->sbase + WBCIR_REG_SP3_RXDATA);
if (data->rxstate == WBCIR_RXSTATE_ERROR)
continue;
+
+ duration = ((irdata & 0x7F) + 1) *
+ (data->carrier_report_enabled ? 2 : 10);
rawir.pulse = irdata & 0x80 ? false : true;
- rawir.duration = US_TO_NS(((irdata & 0x7F) + 1) * 10);
- ir_raw_event_store_with_filter(data->dev, &rawir);
- }
+ rawir.duration = US_TO_NS(duration);
- /* Check if we should go idle */
- if (data->dev->idle) {
- led_trigger_event(data->rxtrigger, LED_OFF);
- data->rxstate = WBCIR_RXSTATE_INACTIVE;
+ if (rawir.pulse)
+ data->pulse_duration += duration;
+
+ ir_raw_event_store_with_filter(data->dev, &rawir);
}
ir_raw_event_handle(data->dev);
@@ -492,6 +533,44 @@ wbcir_irq_handler(int irqno, void *cookie)
*****************************************************************************/
static int
+wbcir_set_carrier_report(struct rc_dev *dev, int enable)
+{
+ struct wbcir_data *data = dev->priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&data->spinlock, flags);
+
+ if (data->carrier_report_enabled == enable) {
+ spin_unlock_irqrestore(&data->spinlock, flags);
+ return 0;
+ }
+
+ data->pulse_duration = 0;
+ wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CCTL, WBCIR_CNTR_R,
+ WBCIR_CNTR_EN | WBCIR_CNTR_R);
+
+ if (enable && data->dev->idle)
+ wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CCTL,
+ WBCIR_CNTR_EN, WBCIR_CNTR_EN | WBCIR_CNTR_R);
+
+ /* Set a higher sampling resolution if carrier reports are enabled */
+ wbcir_select_bank(data, WBCIR_BANK_2);
+ data->dev->rx_resolution = US_TO_NS(enable ? 2 : 10);
+ outb(enable ? 0x03 : 0x0f, data->sbase + WBCIR_REG_SP3_BGDL);
+ outb(0x00, data->sbase + WBCIR_REG_SP3_BGDH);
+
+ /* Enable oversampling if carrier reports are enabled */
+ wbcir_select_bank(data, WBCIR_BANK_7);
+ wbcir_set_bits(data->sbase + WBCIR_REG_SP3_RCCFG,
+ enable ? WBCIR_RX_T_OV : 0, WBCIR_RX_T_OV);
+
+ data->carrier_report_enabled = enable;
+ spin_unlock_irqrestore(&data->spinlock, flags);
+
+ return 0;
+}
+
+static int
wbcir_txcarrier(struct rc_dev *dev, u32 carrier)
{
struct wbcir_data *data = dev->priv;
@@ -837,7 +916,7 @@ wbcir_init_hw(struct wbcir_data *data)
/* Set IRTX_INV */
if (invert)
- outb(0x04, data->ebase + WBCIR_REG_ECEIR_CCTL);
+ outb(WBCIR_IRTX_INV, data->ebase + WBCIR_REG_ECEIR_CCTL);
else
outb(0x00, data->ebase + WBCIR_REG_ECEIR_CCTL);
@@ -867,7 +946,7 @@ wbcir_init_hw(struct wbcir_data *data)
outb(0x30, data->sbase + WBCIR_REG_SP3_EXCR2);
/* Set baud divisor to sample every 10 us */
- outb(0x0F, data->sbase + WBCIR_REG_SP3_BGDL);
+ outb(0x0f, data->sbase + WBCIR_REG_SP3_BGDL);
outb(0x00, data->sbase + WBCIR_REG_SP3_BGDH);
/* Set CEIR mode */
@@ -915,9 +994,8 @@ wbcir_init_hw(struct wbcir_data *data)
/* Clear RX state */
data->rxstate = WBCIR_RXSTATE_INACTIVE;
- data->rxev.duration = 0;
ir_raw_event_reset(data->dev);
- ir_raw_event_handle(data->dev);
+ ir_raw_event_set_idle(data->dev, true);
/* Clear TX state */
if (data->txstate == WBCIR_TXSTATE_ACTIVE) {
@@ -941,7 +1019,7 @@ wbcir_resume(struct pnp_dev *device)
return 0;
}
-static int __devinit
+static int
wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
{
struct device *dev = &device->dev;
@@ -1007,7 +1085,7 @@ wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
}
data->dev->driver_type = RC_DRIVER_IR_RAW;
- data->dev->driver_name = WBCIR_NAME;
+ data->dev->driver_name = DRVNAME;
data->dev->input_name = WBCIR_NAME;
data->dev->input_phys = "wbcir/cir0";
data->dev->input_id.bustype = BUS_HOST;
@@ -1016,19 +1094,25 @@ wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
data->dev->input_id.version = WBCIR_ID_CHIP;
data->dev->map_name = RC_MAP_RC6_MCE;
data->dev->s_idle = wbcir_idle_rx;
+ data->dev->s_carrier_report = wbcir_set_carrier_report;
data->dev->s_tx_mask = wbcir_txmask;
data->dev->s_tx_carrier = wbcir_txcarrier;
data->dev->tx_ir = wbcir_tx;
data->dev->priv = data;
data->dev->dev.parent = &device->dev;
data->dev->timeout = MS_TO_NS(100);
- data->dev->allowed_protos = RC_TYPE_ALL;
+ data->dev->rx_resolution = US_TO_NS(2);
+ data->dev->allowed_protos = RC_BIT_ALL;
+
+ err = rc_register_device(data->dev);
+ if (err)
+ goto exit_free_rc;
if (!request_region(data->wbase, WAKEUP_IOMEM_LEN, DRVNAME)) {
dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
data->wbase, data->wbase + WAKEUP_IOMEM_LEN - 1);
err = -EBUSY;
- goto exit_free_rc;
+ goto exit_unregister_device;
}
if (!request_region(data->ebase, EHFUNC_IOMEM_LEN, DRVNAME)) {
@@ -1053,24 +1137,20 @@ wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
goto exit_release_sbase;
}
- err = rc_register_device(data->dev);
- if (err)
- goto exit_free_irq;
-
device_init_wakeup(&device->dev, 1);
wbcir_init_hw(data);
return 0;
-exit_free_irq:
- free_irq(data->irq, device);
exit_release_sbase:
release_region(data->sbase, SP_IOMEM_LEN);
exit_release_ebase:
release_region(data->ebase, EHFUNC_IOMEM_LEN);
exit_release_wbase:
release_region(data->wbase, WAKEUP_IOMEM_LEN);
+exit_unregister_device:
+ rc_unregister_device(data->dev);
exit_free_rc:
rc_free_device(data->dev);
exit_unregister_led:
@@ -1086,7 +1166,7 @@ exit:
return err;
}
-static void __devexit
+static void
wbcir_remove(struct pnp_dev *device)
{
struct wbcir_data *data = pnp_get_drvdata(device);
@@ -1132,7 +1212,7 @@ static struct pnp_driver wbcir_driver = {
.name = WBCIR_NAME,
.id_table = wbcir_ids,
.probe = wbcir_probe,
- .remove = __devexit_p(wbcir_remove),
+ .remove = wbcir_remove,
.suspend = wbcir_suspend,
.resume = wbcir_resume,
.shutdown = wbcir_shutdown
generated by cgit v1.2.3 (git 2.0.4) at 2025-09-11 02:52:39 +0000