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From db8f1eba9154789c45c6a92413bbbd94f5d9c7f5 Mon Sep 17 00:00:00 2001
From: Tim Yamin <plasm@roo.me.uk>
Date: Wed, 29 Apr 2009 17:30:25 -0700
Subject: [PATCH] Touch Book: turn on/off the class D amplifier depending on whether the
headphones are plugged into the jack or not.
Signed-off-by: Tim Yamin <plasm@roo.me.uk>
---
sound/soc/omap/omap3beagle.c | 33 +++++++++++++++++++++++++++++++++
1 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/sound/soc/omap/omap3beagle.c b/sound/soc/omap/omap3beagle.c
index fd24a4a..1236638 100644
--- a/sound/soc/omap/omap3beagle.c
+++ b/sound/soc/omap/omap3beagle.c
@@ -20,7 +20,10 @@
*/
#include <linux/clk.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
#include <linux/platform_device.h>
+
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
@@ -35,6 +38,9 @@
#include "omap-pcm.h"
#include "../codecs/twl4030.h"
+#define TB_HEADPHONE_GPIO 56
+#define TB_HEADPHONE_IRQ OMAP_GPIO_IRQ(TB_HEADPHONE_GPIO)
+
static int omap3beagle_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
@@ -103,6 +109,33 @@ static struct snd_soc_device omap3beagle_snd_devdata = {
static struct platform_device *omap3beagle_snd_device;
+static void jack_work_func(struct work_struct *wq)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(omap3beagle_snd_device);
+ struct snd_soc_codec *codec = socdev->codec;
+
+ snd_soc_dapm_sync(codec);
+}
+DECLARE_WORK(jack_work, jack_work_func);
+
+static irqreturn_t touchbook_headphone_event(int irq, void *snd)
+{
+ int status = gpio_get_value(TB_HEADPHONE_GPIO);
+ struct snd_soc_device *socdev = platform_get_drvdata(omap3beagle_snd_device);
+ struct snd_soc_codec *codec = socdev->codec;
+
+ if(status) {
+ snd_soc_dapm_disable_pin(codec, "HFL");
+ snd_soc_dapm_disable_pin(codec, "HFR");
+ } else {
+ snd_soc_dapm_enable_pin(codec, "HFL");
+ snd_soc_dapm_enable_pin(codec, "HFR");
+ }
+
+ schedule_work(&jack_work);
+ return IRQ_HANDLED;
+}
+
static int __init omap3beagle_soc_init(void)
{
int ret;
@@ -123,10 +156,22 @@ static int __init omap3beagle_soc_init(void)
omap3beagle_snd_devdata.dev = &omap3beagle_snd_device->dev;
*(unsigned int *)omap3beagle_dai.cpu_dai->private_data = 1; /* McBSP2 */
+ /* Touch Book -- headphone jack sensor */
+ omap_set_gpio_debounce(TB_HEADPHONE_GPIO, 1);
+ omap_set_gpio_debounce_time(TB_HEADPHONE_GPIO, 0xff);
+
+ ret = request_irq(TB_HEADPHONE_IRQ, touchbook_headphone_event, IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING, "touchbook_headphone", omap3beagle_snd_device);
+ if (ret < 0)
+ goto err1;
+
ret = platform_device_add(omap3beagle_snd_device);
if (ret)
goto err1;
+ /* Detect headphone status */
+ touchbook_headphone_event(0, omap3beagle_snd_device);
+
return 0;
err1:
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