[s3c24xx] Move headset detection to the sound driver using the jack framework.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17069 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 4 insertions, 163 deletions

diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c b/target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c
index 0814d100e..0fca17071 100644
--- a/target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c
+++ b/target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c
@@ -21,7 +21,6 @@
 #include <linux/jiffies.h>
 #include <linux/module.h>
 #include <linux/slab.h>
-#include <linux/workqueue.h>
 
 #include <mach/gpio.h>
 #include <asm/mach-types.h>
@@ -35,21 +34,12 @@ extern int global_inside_suspend;
 struct gta02kbd {
 	struct platform_device *pdev;
 	struct input_dev *input;
-	struct device *cdev;
-	struct work_struct work;
 	int aux_state;
-	int work_in_progress;
-	int hp_irq_count_in_work;
-	int hp_irq_count;
-	int jack_irq;
 };
 
-static struct class *gta02kbd_switch_class;
-
 enum keys {
 	GTA02_KEY_AUX,
 	GTA02_KEY_HOLD,
-	GTA02_KEY_JACK,
 };
 
 struct gta02kbd_key {
@@ -60,7 +50,6 @@ struct gta02kbd_key {
 };
 
 static irqreturn_t gta02kbd_aux_irq(int irq, void *dev_id);
-static irqreturn_t gta02kbd_headphone_irq(int irq, void *dev_id);
 static irqreturn_t gta02kbd_default_key_irq(int irq, void *dev_id);
 
 
@@ -75,10 +64,6 @@ static struct gta02kbd_key keys[] = {
 		.isr = gta02kbd_default_key_irq,
 		.input_key = KEY_PAUSE,
 	},
-	[GTA02_KEY_JACK] = {
-		.name = "GTA02 Headphone jack",
-		.isr = gta02kbd_headphone_irq,
-	},
 };
 
 /* This timer section filters AUX button IRQ bouncing */
@@ -154,106 +139,6 @@ static irqreturn_t gta02kbd_default_key_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-
-static const char *event_array_jack[2][4] = {
-	[0] = {
-		"SWITCH_NAME=headset",
-		"SWITCH_STATE=0",
-		"EVENT=remove",
-		NULL
-	},
-	[1] = {
-		"SWITCH_NAME=headset",
-		"SWITCH_STATE=1",
-		"EVENT=insert",
-		NULL
-	},
-};
-
-static void gta02kbd_jack_event(struct device *dev, int num)
-{
-	kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, (char **)event_array_jack[!!num]);
-}
-
-
-static void gta02kbd_debounce_jack(struct work_struct *work)
-{
-	struct gta02kbd *kbd = container_of(work, struct gta02kbd, work);
-	unsigned long flags;
-	int loop = 0;
-	int level;
-
-	do {
-		/*
-		 * we wait out any multiple interrupt
-		 * stuttering in 100ms lumps
-		 */
-		do {
-			kbd->hp_irq_count_in_work = kbd->hp_irq_count;
-			msleep(100);
-		} while (kbd->hp_irq_count != kbd->hp_irq_count_in_work);
-		/*
-		 * no new interrupts on jack for 100ms...
-		 * ok we will report it
-		 */
-		level = gpio_get_value(kbd->pdev->resource[GTA02_KEY_JACK].start);
-		input_report_switch(kbd->input, SW_HEADPHONE_INSERT, level);
-		input_sync(kbd->input);
-		gta02kbd_jack_event(kbd->cdev, level);
-		/*
-		 * we go around the outer loop again if we detect that more
-		 * interrupts came while we are servicing here.  But we have
-		 * to sequence it carefully with interrupts off
-		 */
-		local_save_flags(flags);
-		/* no interrupts during this work means we can exit the work */
-		loop = !!(kbd->hp_irq_count != kbd->hp_irq_count_in_work);
-		if (!loop)
-			kbd->work_in_progress = 0;
-		local_irq_restore(flags);
-		/*
-		 * interrupt that comes here will either queue a new work action
-		 * since work_in_progress is cleared now, or be dealt with
-		 * when we loop.
-		 */
-	} while (loop);
-}
-
-
-static irqreturn_t gta02kbd_headphone_irq(int irq, void *dev_id)
-{
-	struct gta02kbd *gta02kbd_data = dev_id;
-
-	/*
-	 * this interrupt is prone to bouncing and userspace doesn't like
-	 * to have to deal with that kind of thing.  So we do not accept
-	 * that a jack interrupt is equal to a jack event.  Instead we fire
-	 * some work on the first interrupt, and it hangs about in 100ms units
-	 * until no more interrupts come.  Then it accepts the state it finds
-	 * for jack insert and reports it once
-	 */
-
-	gta02kbd_data->hp_irq_count++;
-	/*
-	 * the first interrupt we see for a while, we fire the work item
-	 * and record the interrupt count when we did that.  If more interrupts
-	 * come in the meanwhile, we can tell by the difference in that
-	 * stored count and hp_irq_count which increments every interrupt
-	 */
-	if (!gta02kbd_data->work_in_progress) {
-		gta02kbd_data->jack_irq = irq;
-		gta02kbd_data->hp_irq_count_in_work =
-						gta02kbd_data->hp_irq_count;
-		if (!schedule_work(&gta02kbd_data->work))
-			printk(KERN_ERR
-				"Unable to schedule headphone debounce\n");
-		else
-			gta02kbd_data->work_in_progress = 1;
-	}
-
-	return IRQ_HANDLED;
-}
-
 #ifdef CONFIG_PM
 static int gta02kbd_suspend(struct platform_device *dev, pm_message_t state)
 {
@@ -272,23 +157,6 @@ static int gta02kbd_resume(struct platform_device *dev)
 #define gta02kbd_resume	NULL
 #endif
 
-static ssize_t gta02kbd_switch_name_show(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	return sprintf(buf, "%s\n", "gta02 Headset Jack");
-}
-
-static ssize_t gta02kbd_switch_state_show(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	struct gta02kbd *kbd = dev_get_drvdata(dev);
-	return sprintf(buf, "%d\n",
-		   gpio_get_value(kbd->pdev->resource[GTA02_KEY_JACK].start));
-}
-
-static DEVICE_ATTR(name, S_IRUGO , gta02kbd_switch_name_show, NULL);
-static DEVICE_ATTR(state, S_IRUGO , gta02kbd_switch_state_show, NULL);
-
 static int gta02kbd_probe(struct platform_device *pdev)
 {
 	struct gta02kbd *gta02kbd;
@@ -297,6 +165,9 @@ static int gta02kbd_probe(struct platform_device *pdev)
 	int irq;
 	int n;
 
+	if (pdev->resource[0].flags != 0)
+		return -EINVAL;
+
 	gta02kbd = kzalloc(sizeof(struct gta02kbd), GFP_KERNEL);
 	input_dev = input_allocate_device();
 	if (!gta02kbd || !input_dev) {
@@ -308,15 +179,10 @@ static int gta02kbd_probe(struct platform_device *pdev)
 	gta02kbd->pdev = pdev;
 	timer_kbd = gta02kbd;
 
-	if (pdev->resource[0].flags != 0)
-		return -EINVAL;
-
 	platform_set_drvdata(pdev, gta02kbd);
 
 	gta02kbd->input = input_dev;
 
-	INIT_WORK(&gta02kbd->work, gta02kbd_debounce_jack);
-
 	input_dev->name = "GTA02 Buttons";
 	input_dev->phys = "gta02kbd/input0";
 	input_dev->id.bustype = BUS_HOST;
@@ -326,7 +192,6 @@ static int gta02kbd_probe(struct platform_device *pdev)
 	input_dev->dev.parent = &pdev->dev;
 
 	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_SW);
-	set_bit(SW_HEADPHONE_INSERT, input_dev->swbit);
 	set_bit(KEY_PHONE, input_dev->keybit);
 	set_bit(KEY_PAUSE, input_dev->keybit);
 
@@ -334,21 +199,6 @@ static int gta02kbd_probe(struct platform_device *pdev)
 	if (rc)
 		goto out_register;
 
-	gta02kbd->cdev = device_create(gta02kbd_switch_class,
-					  &pdev->dev, 0, gta02kbd, "headset");
-	if (unlikely(IS_ERR(gta02kbd->cdev))) {
-		rc = PTR_ERR(gta02kbd->cdev);
-		goto out_device_create;
-	}
-
-	rc = device_create_file(gta02kbd->cdev, &dev_attr_name);
-	if(rc)
-		goto out_device_create_file;
-
-	rc = device_create_file(gta02kbd->cdev, &dev_attr_state);
-	if(rc)
-		goto out_device_create_file;
-
 	/* register GPIO IRQs */
 	for(n = 0; n < min(pdev->num_resources, ARRAY_SIZE(keys)); n++) {
 
@@ -371,18 +221,15 @@ static int gta02kbd_probe(struct platform_device *pdev)
 				free_irq(gpio_to_irq(pdev->resource[n].start),
 								    gta02kbd);
 			}
-			goto out_device_create_file;
+			goto out_device_create;
 		}
 
 		keys[n].irq = irq;
 	}
 
-	enable_irq_wake(keys[GTA02_KEY_JACK].irq);
 
 	return 0;
 
-out_device_create_file:
-	device_unregister(gta02kbd->cdev);
 out_device_create:
 	input_unregister_device(gta02kbd->input);
 out_register:
@@ -397,11 +244,9 @@ static int gta02kbd_remove(struct platform_device *pdev)
 {
 	struct gta02kbd *gta02kbd = platform_get_drvdata(pdev);
 
-	free_irq(gpio_to_irq(pdev->resource[2].start), gta02kbd);
 	free_irq(gpio_to_irq(pdev->resource[1].start), gta02kbd);
 	free_irq(gpio_to_irq(pdev->resource[0].start), gta02kbd);
 
-	device_unregister(gta02kbd->cdev);
 	input_unregister_device(gta02kbd->input);
 	input_free_device(gta02kbd->input);
 	platform_set_drvdata(pdev, NULL);
@@ -422,16 +267,12 @@ static struct platform_driver gta02kbd_driver = {
 
 static int __devinit gta02kbd_init(void)
 {
-	gta02kbd_switch_class = class_create(THIS_MODULE, "switch");
-	if (IS_ERR(gta02kbd_switch_class))
-		return PTR_ERR(gta02kbd_switch_class);
 	return platform_driver_register(&gta02kbd_driver);
 }
 
 static void __exit gta02kbd_exit(void)
 {
 	platform_driver_unregister(&gta02kbd_driver);
-	class_destroy(gta02kbd_switch_class);
 }
 
 module_init(gta02kbd_init);