[media] rc: Add support for GPIO based IR Receiver driver
Adds GPIO based IR Receiver driver. It decodes signals using decoders
available in rc framework.
Change-Id: Ifc4cbb6d5a507aeb9671fb0d559b97b1a95ea09c
Signed-off-by: Ravi Kumar V <kumarrav@codeaurora.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/rc/gpio-ir-recv.c b/drivers/media/rc/gpio-ir-recv.c
index a9b8e40..6744479 100644
--- a/drivers/media/rc/gpio-ir-recv.c
+++ b/drivers/media/rc/gpio-ir-recv.c
@@ -21,27 +21,22 @@
#include <media/rc-core.h>
#include <media/gpio-ir-recv.h>
-#define TSOP_DRIVER_NAME "gpio-rc-recv"
-#define TSOP_DEVICE_NAME "gpio_ir_recv"
+#define GPIO_IR_DRIVER_NAME "gpio-rc-recv"
+#define GPIO_IR_DEVICE_NAME "gpio_ir_recv"
struct gpio_rc_dev {
struct rc_dev *rcdev;
- struct mutex lock;
unsigned int gpio_nr;
bool active_low;
- bool can_wakeup;
- struct work_struct work;
};
-static void ir_decoder_work(struct work_struct *work)
+static irqreturn_t gpio_ir_recv_irq(int irq, void *dev_id)
{
- struct gpio_rc_dev *gpio_dev = container_of(work,
- struct gpio_rc_dev, work);
+ struct gpio_rc_dev *gpio_dev = dev_id;
unsigned int gval;
int rc = 0;
enum raw_event_type type = IR_SPACE;
- mutex_lock(&gpio_dev->lock);
gval = gpio_get_value_cansleep(gpio_dev->gpio_nr);
if (gval < 0)
@@ -60,15 +55,6 @@
ir_raw_event_handle(gpio_dev->rcdev);
err_get_value:
- mutex_unlock(&gpio_dev->lock);
-}
-
-static irqreturn_t gpio_ir_recv_irq_handler(int irq, void *data)
-{
- struct gpio_rc_dev *gpio_dev = data;
-
- schedule_work(&gpio_dev->work);
-
return IRQ_HANDLED;
}
@@ -78,7 +64,7 @@
struct rc_dev *rcdev;
const struct gpio_ir_recv_platform_data *pdata =
pdev->dev.platform_data;
- int rc = 0;
+ int rc;
if (!pdata)
return -EINVAL;
@@ -90,8 +76,6 @@
if (!gpio_dev)
return -ENOMEM;
- mutex_init(&gpio_dev->lock);
-
rcdev = rc_allocate_device();
if (!rcdev) {
rc = -ENOMEM;
@@ -99,18 +83,15 @@
}
rcdev->driver_type = RC_DRIVER_IR_RAW;
- rcdev->allowed_protos = RC_TYPE_NEC;
- rcdev->input_name = TSOP_DEVICE_NAME;
+ rcdev->allowed_protos = RC_TYPE_ALL;
+ rcdev->input_name = GPIO_IR_DEVICE_NAME;
rcdev->input_id.bustype = BUS_HOST;
- rcdev->driver_name = TSOP_DRIVER_NAME;
- rcdev->map_name = RC_MAP_SAMSUNG_NECX;
+ rcdev->driver_name = GPIO_IR_DRIVER_NAME;
+ rcdev->map_name = RC_MAP_EMPTY;
gpio_dev->rcdev = rcdev;
gpio_dev->gpio_nr = pdata->gpio_nr;
gpio_dev->active_low = pdata->active_low;
- gpio_dev->can_wakeup = pdata->can_wakeup;
-
- INIT_WORK(&gpio_dev->work, ir_decoder_work);
rc = gpio_request(pdata->gpio_nr, "gpio-ir-recv");
if (rc < 0)
@@ -127,22 +108,15 @@
platform_set_drvdata(pdev, gpio_dev);
- rc = request_irq(gpio_to_irq(pdata->gpio_nr), gpio_ir_recv_irq_handler,
+ rc = request_any_context_irq(gpio_to_irq(pdata->gpio_nr),
+ gpio_ir_recv_irq,
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
- "gpio-ir-recv-irq", gpio_dev);
+ "gpio-ir-recv-irq", gpio_dev);
if (rc < 0)
goto err_request_irq;
- if (pdata->can_wakeup == true) {
- rc = enable_irq_wake(gpio_to_irq(pdata->gpio_nr));
- if (rc < 0)
- goto err_enable_irq_wake;
- }
-
return 0;
-err_enable_irq_wake:
- free_irq(gpio_to_irq(gpio_dev->gpio_nr), gpio_dev);
err_request_irq:
platform_set_drvdata(pdev, NULL);
rc_unregister_device(rcdev);
@@ -153,7 +127,6 @@
rc_free_device(rcdev);
rcdev = NULL;
err_allocate_device:
- mutex_destroy(&gpio_dev->lock);
kfree(gpio_dev);
return rc;
}
@@ -162,24 +135,57 @@
{
struct gpio_rc_dev *gpio_dev = platform_get_drvdata(pdev);
- flush_work_sync(&gpio_dev->work);
- disable_irq_wake(gpio_to_irq(gpio_dev->gpio_nr));
free_irq(gpio_to_irq(gpio_dev->gpio_nr), gpio_dev);
platform_set_drvdata(pdev, NULL);
rc_unregister_device(gpio_dev->rcdev);
gpio_free(gpio_dev->gpio_nr);
rc_free_device(gpio_dev->rcdev);
- mutex_destroy(&gpio_dev->lock);
kfree(gpio_dev);
return 0;
}
+#ifdef CONFIG_PM
+static int gpio_ir_recv_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct gpio_rc_dev *gpio_dev = platform_get_drvdata(pdev);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(gpio_to_irq(gpio_dev->gpio_nr));
+ else
+ disable_irq(gpio_to_irq(gpio_dev->gpio_nr));
+
+ return 0;
+}
+
+static int gpio_ir_recv_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct gpio_rc_dev *gpio_dev = platform_get_drvdata(pdev);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(gpio_to_irq(gpio_dev->gpio_nr));
+ else
+ enable_irq(gpio_to_irq(gpio_dev->gpio_nr));
+
+ return 0;
+}
+
+static const struct dev_pm_ops gpio_ir_recv_pm_ops = {
+ .suspend = gpio_ir_recv_suspend,
+ .resume = gpio_ir_recv_resume,
+};
+#endif
+
static struct platform_driver gpio_ir_recv_driver = {
.probe = gpio_ir_recv_probe,
.remove = __devexit_p(gpio_ir_recv_remove),
.driver = {
- .name = TSOP_DRIVER_NAME,
+ .name = GPIO_IR_DRIVER_NAME,
.owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &gpio_ir_recv_pm_ops,
+#endif
},
};
diff --git a/include/media/gpio-ir-recv.h b/include/media/gpio-ir-recv.h
index 3eab611..61a7fbb 100644
--- a/include/media/gpio-ir-recv.h
+++ b/include/media/gpio-ir-recv.h
@@ -16,7 +16,6 @@
struct gpio_ir_recv_platform_data {
unsigned int gpio_nr;
bool active_low;
- bool can_wakeup;
};
#endif /* __GPIO_IR_RECV_H__ */