add support for target 3c24xx (more known as Openmoko GTA02 "Freerunner") and merge it with the openmoko-target and the work Michael Buesch <mb> did

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13609 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 118 insertions, 0 deletions

diff --git a/target/linux/s3c24xx/patches/0111-fix-jack-debounce.patch.patch b/target/linux/s3c24xx/patches/0111-fix-jack-debounce.patch.patch
new file mode 100755
index 0000000000..419bfd2e97
--- /dev/null
+++ b/target/linux/s3c24xx/patches/0111-fix-jack-debounce.patch.patch
@@ -0,0 +1,118 @@
+From 4c83444bd41a70fe47731e589c6575da2bfc78c8 Mon Sep 17 00:00:00 2001
+From: Andy Green <andy@openmoko.com>
+Date: Fri, 25 Jul 2008 23:06:05 +0100
+Subject: [PATCH] fix-jack-debounce.patch
+
+Headphone jack detection is bouncy, it can trigger multiple interrupts
+on insertion or removal.  This patch adds a workqueue that waits out the
+interrupt spew in 100ms units, and if it sees no more interrupts for 100ms
+only then samples and reports the jack state.  I was unable to get a bounce
+after 20 or so tries after this.
+
+Signed-off-by: Andy Green <andy@openmoko.com>
+---
+ drivers/input/keyboard/neo1973kbd.c |   63 ++++++++++++++++++++++++++++++++--
+ 1 files changed, 59 insertions(+), 4 deletions(-)
+
+diff --git a/drivers/input/keyboard/neo1973kbd.c b/drivers/input/keyboard/neo1973kbd.c
+index 06fa8e0..6c96660 100644
+--- a/drivers/input/keyboard/neo1973kbd.c
++++ b/drivers/input/keyboard/neo1973kbd.c
+@@ -21,6 +21,7 @@
+ #include <linux/jiffies.h>
+ #include <linux/module.h>
+ #include <linux/slab.h>
++#include <linux/workqueue.h>
+ 
+ #include <asm/gpio.h>
+ #include <asm/mach-types.h>
+@@ -28,6 +29,11 @@
+ struct neo1973kbd {
+ 	struct input_dev *input;
+ 	unsigned int suspended;
++	struct work_struct work;
++	int work_in_progress;
++	int hp_irq_count_in_work;
++	int hp_irq_count;
++	int jack_irq;
+ };
+ 
+ static irqreturn_t neo1973kbd_aux_irq(int irq, void *dev_id)
+@@ -52,14 +58,61 @@ static irqreturn_t neo1973kbd_hold_irq(int irq, void *dev_id)
+ 	return IRQ_HANDLED;
+ }
+ 
++
++static void neo1973kbd_debounce_jack(struct work_struct *work)
++{
++	struct neo1973kbd *kbd = container_of(work, struct neo1973kbd, work);
++
++	/* 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 */
++
++	input_report_switch(kbd->input,
++			    SW_HEADPHONE_INSERT,
++			    gpio_get_value(irq_to_gpio(kbd->jack_irq)));
++	input_sync(kbd->input);
++
++	/* next time we get an interrupt on jack we need new work action */
++	kbd->work_in_progress = 0;
++}
++
++
++
+ static irqreturn_t neo1973kbd_headphone_irq(int irq, void *dev_id)
+ {
+ 	struct neo1973kbd *neo1973kbd_data = dev_id;
+ 
+-	int key_pressed = gpio_get_value(irq_to_gpio(irq));
+-	input_report_switch(neo1973kbd_data->input,
+-			    SW_HEADPHONE_INSERT, key_pressed);
+-	input_sync(neo1973kbd_data->input);
++	/*
++	 * 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
++	 */
++
++	neo1973kbd_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 (!neo1973kbd_data->work_in_progress) {
++		neo1973kbd_data->jack_irq = irq;
++		neo1973kbd_data->hp_irq_count_in_work =
++						neo1973kbd_data->hp_irq_count;
++		if (!schedule_work(&neo1973kbd_data->work))
++			printk(KERN_ERR
++				"Unable to schedule headphone debounce\n");
++		else
++			neo1973kbd_data->work_in_progress = 1;
++	}
+ 
+ 	return IRQ_HANDLED;
+ }
+@@ -120,6 +173,8 @@ static int neo1973kbd_probe(struct platform_device *pdev)
+ 
+ 	neo1973kbd->input = input_dev;
+ 
++	INIT_WORK(&neo1973kbd->work, neo1973kbd_debounce_jack);
++
+ 	input_dev->name = "Neo1973 Buttons";
+ 	input_dev->phys = "neo1973kbd/input0";
+ 	input_dev->id.bustype = BUS_HOST;
+-- 
+1.5.6.3
+