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openwrt-xburst/target/linux/xburst/files-2.6.32/sound/soc/jz4740/n516.c

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/*
* Copyright (C) 2009, Yauhen Kharuzhy <jekhor@gmail.com>
* OpenInkpot project
* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/jack.h>
#include <linux/gpio.h>
#include <linux/workqueue.h>
#include "../codecs/jzcodec.h"
#include "jz4740-pcm.h"
#include "jz4740-i2s.h"
#include <asm/mach-jz4740/board-n516.h>
enum {
N516_SPEAKER_AUTO = 0,
N516_SPEAKER_OFF = 1,
N516_SPEAKER_ON = 2,
};
static int n516_speaker_mode;
static struct snd_soc_codec *n516_codec;
static struct work_struct n516_headphone_work;
static void n516_ext_control(void)
{
if (!n516_codec)
return;
switch (n516_speaker_mode) {
case N516_SPEAKER_ON:
snd_soc_dapm_enable_pin(n516_codec, "Speaker");
break;
case N516_SPEAKER_OFF:
snd_soc_dapm_disable_pin(n516_codec, "Speaker");
break;
case N516_SPEAKER_AUTO:
if (snd_soc_dapm_get_pin_status(n516_codec, "Headphone"))
snd_soc_dapm_disable_pin(n516_codec, "Speaker");
else
snd_soc_dapm_enable_pin(n516_codec, "Speaker");
break;
default:
break;
}
/* signal a DAPM event */
snd_soc_dapm_sync(n516_codec);
}
static int n516_speaker_event(struct snd_soc_dapm_widget *widget,
struct snd_kcontrol *ctrl, int event)
{
int on = !SND_SOC_DAPM_EVENT_OFF(event);
gpio_set_value(GPIO_SPEAKER_ENABLE, on);
return 0;
}
static void n516_headphone_event_work(struct work_struct *work)
{
n516_ext_control();
}
static int n516_headphone_event(struct snd_soc_dapm_widget *widget,
struct snd_kcontrol *ctrl, int event)
{
/* We can't call soc_dapm_sync from a event handler */
if (event & (SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD))
schedule_work(&n516_headphone_work);
return 0;
}
static const struct snd_soc_dapm_widget n516_widgets[] = {
SND_SOC_DAPM_SPK("Speaker", n516_speaker_event),
SND_SOC_DAPM_HP("Headphone", n516_headphone_event),
SND_SOC_DAPM_MIC("Mic", NULL),
};
static const struct snd_soc_dapm_route n516_routes[] = {
{"Mic", NULL, "MIC"},
{"Speaker", NULL, "LOUT"},
{"Speaker", NULL, "ROUT"},
{"Headphone", NULL, "LOUT"},
{"Headphone", NULL, "ROUT"},
};
static const char *n516_speaker_modes[] = {"Auto", "Off", "On"};
static const struct soc_enum n516_speaker_mode_enum =
SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(n516_speaker_modes), n516_speaker_modes);
static int n516_get_speaker_mode(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.integer.value[0] = n516_speaker_mode;
return 0;
}
static int n516_set_speaker_mode(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
if (n516_speaker_mode == ucontrol->value.integer.value[0])
return 0;
n516_speaker_mode = ucontrol->value.integer.value[0];
n516_ext_control();
return 1;
}
static const struct snd_kcontrol_new n516_controls[] = {
SOC_ENUM_EXT("Speaker Function", n516_speaker_mode_enum,
n516_get_speaker_mode, n516_set_speaker_mode),
};
#define N516_DAIFMT (SND_SOC_DAIFMT_I2S | \
SND_SOC_DAIFMT_NB_NF | \
SND_SOC_DAIFMT_CBM_CFM)
static int n516_codec_init(struct snd_soc_codec *codec)
{
int ret;
struct snd_soc_dai *cpu_dai = codec->socdev->card->dai_link->cpu_dai;
struct snd_soc_dai *codec_dai = codec->socdev->card->dai_link->codec_dai;
n516_codec = codec;
snd_soc_dapm_nc_pin(codec, "LIN");
snd_soc_dapm_nc_pin(codec, "RIN");
ret = snd_soc_dai_set_fmt(codec_dai, N516_DAIFMT);
if (ret < 0) {
dev_err(codec->dev, "Failed to set codec dai format: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_fmt(cpu_dai, N516_DAIFMT);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_sysclk(codec_dai, JZCODEC_SYSCLK, 111,
SND_SOC_CLOCK_IN);
if (ret < 0) {
dev_err(codec->dev, "Failed to set codec dai sysclk: %d\n", ret);
return ret;
}
ret = snd_soc_add_controls(codec, n516_controls,
ARRAY_SIZE(n516_controls));
if (ret) {
dev_err(codec->dev, "Failed to add controls: %d\n", ret);
return ret;
}
ret = snd_soc_dapm_new_controls(codec, n516_widgets,
ARRAY_SIZE(n516_widgets));
if (ret) {
dev_err(codec->dev, "Failed to add dapm controls: %d\n", ret);
return ret;
}
ret = snd_soc_dapm_add_routes(codec, n516_routes, ARRAY_SIZE(n516_routes));
if (ret) {
dev_err(codec->dev, "Failed to add dapm routes: %d\n", ret);
return ret;
}
snd_soc_dapm_sync(codec);
return 0;
}
static struct snd_soc_dai_link n516_dai = {
.name = "jz-codec",
.stream_name = "JZCODEC",
.cpu_dai = &jz4740_i2s_dai,
.codec_dai = &jz_codec_dai,
.init = n516_codec_init,
};
static struct snd_soc_card n516_card = {
.name = "N516",
.dai_link = &n516_dai,
.num_links = 1,
.platform = &jz4740_soc_platform,
};
static struct snd_soc_device n516_snd_devdata = {
.card = &n516_card,
.codec_dev = &soc_codec_dev_jzcodec,
};
static struct platform_device *n516_snd_device;
static struct snd_soc_jack n516_hp_jack;
static struct snd_soc_jack_pin n516_hp_pin = {
.pin = "Headphone",
.mask = SND_JACK_HEADPHONE,
};
static struct snd_soc_jack_gpio n516_hp_gpio = {
.gpio = GPIO_HPHONE_DETECT,
.name = "Headphone detect",
.report = SND_JACK_HEADPHONE,
.debounce_time = 100,
};
static int __init n516_add_headphone_jack(void)
{
int ret;
ret = snd_soc_jack_new(&n516_card, "Headphone jack",
SND_JACK_HEADPHONE, &n516_hp_jack);
if (ret)
return ret;
ret = snd_soc_jack_add_pins(&n516_hp_jack, 1, &n516_hp_pin);
if (ret)
return ret;
ret = snd_soc_jack_add_gpios(&n516_hp_jack, 1, &n516_hp_gpio);
return ret;
}
static int __init n516_init(void)
{
int ret;
n516_snd_device = platform_device_alloc("soc-audio", -1);
if (!n516_snd_device)
return -ENOMEM;
ret = gpio_request(GPIO_SPEAKER_ENABLE, "Speaker enable");
if (ret) {
pr_err("n516 snd: Failed to request SPEAKER_ENABLE GPIO(%d): %d\n",
GPIO_SPEAKER_ENABLE, ret);
goto err_device_put;
}
gpio_direction_output(GPIO_SPEAKER_ENABLE, 0);
INIT_WORK(&n516_headphone_work, n516_headphone_event_work);
platform_set_drvdata(n516_snd_device, &n516_snd_devdata);
n516_snd_devdata.dev = &n516_snd_device->dev;
ret = platform_device_add(n516_snd_device);
if (ret) {
pr_err("n516 snd: Failed to add snd soc device: %d\n", ret);
goto err_unset_pdata;
}
ret = n516_add_headphone_jack();
/* We can live without it, so just print a warning */
if (ret)
pr_warning("n516 snd: Failed to initalise headphone jack: %d\n", ret);
return 0;
err_unset_pdata:
platform_set_drvdata(n516_snd_device, NULL);
/*err_gpio_free_speaker:*/
gpio_free(GPIO_SPEAKER_ENABLE);
err_device_put:
platform_device_put(n516_snd_device);
return ret;
}
module_init(n516_init);
static void __exit n516_exit(void)
{
snd_soc_jack_free_gpios(&n516_hp_jack, 1, &n516_hp_gpio);
gpio_free(GPIO_SPEAKER_ENABLE);
platform_device_unregister(n516_snd_device);
}
module_exit(n516_exit);
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("ALSA SoC N516 Audio support");
MODULE_LICENSE("GPL v2");