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/*
* ASoC driver for Freescale MXS EVK board
*
* Author: Vladislav Buzov <vbuzov@embeddedalley.com>
*
* Copyright 2008-2010 Freescale Semiconductor, Inc.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.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 <asm/mach-types.h>
#include <asm/dma.h>
#include <mach/hardware.h>
#include "../codecs/mxs-adc-codec.h"
#include "mxs-adc.h"
#include "mxs-pcm.h"
/* mxs evk machine connections to the codec pins */
static const struct snd_soc_dapm_route audio_map[] = {
/* HPR/HPL OUT --> Headphone Jack */
{"Headphone Jack", NULL, "HPR"},
{"Headphone Jack", NULL, "HPL"},
/* SPEAKER OUT --> Ext Speaker */
{"Ext Spk", NULL, "SPEAKER"},
};
static int mxs_evk_jack_func;
static int mxs_evk_spk_func;
static const char *jack_function[] = { "off", "on"};
static const char *spk_function[] = { "off", "on" };
static const struct soc_enum mxs_evk_enum[] = {
SOC_ENUM_SINGLE_EXT(2, jack_function),
SOC_ENUM_SINGLE_EXT(2, spk_function),
};
static int mxs_evk_get_jack(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.enumerated.item[0] = mxs_evk_jack_func;
return 0;
}
static int mxs_evk_set_jack(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
if (mxs_evk_jack_func == ucontrol->value.enumerated.item[0])
return 0;
mxs_evk_jack_func = ucontrol->value.enumerated.item[0];
if (mxs_evk_jack_func)
snd_soc_dapm_enable_pin(codec, "Headphone Jack");
else
snd_soc_dapm_disable_pin(codec, "Headphone Jack");
snd_soc_dapm_sync(codec);
return 1;
}
static int mxs_evk_get_spk(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.enumerated.item[0] = mxs_evk_spk_func;
return 0;
}
static int mxs_evk_set_spk(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
if (mxs_evk_spk_func == ucontrol->value.enumerated.item[0])
return 0;
mxs_evk_spk_func = ucontrol->value.enumerated.item[0];
if (mxs_evk_spk_func)
snd_soc_dapm_enable_pin(codec, "Ext Spk");
else
snd_soc_dapm_disable_pin(codec, "Ext Spk");
snd_soc_dapm_sync(codec);
return 1;
}
/* mxs evk card dapm widgets */
static const struct snd_soc_dapm_widget mxs_evk_dapm_widgets[] = {
SND_SOC_DAPM_SPK("Ext Spk", NULL),
SND_SOC_DAPM_HP("Headphone Jack", NULL),
};
static const struct snd_kcontrol_new mxs_evk_controls[] = {
SOC_ENUM_EXT("HP Playback Switch", mxs_evk_enum[0], mxs_evk_get_jack,
mxs_evk_set_jack),
SOC_ENUM_EXT("Speaker Playback Switch", mxs_evk_enum[1],
mxs_evk_get_spk, mxs_evk_set_spk),
};
static int mxs_evk_codec_init(struct snd_soc_codec *codec)
{
int i, ret;
/* Add mxs evk specific controls */
snd_soc_add_controls(codec, mxs_evk_controls,
ARRAY_SIZE(mxs_evk_controls));
/* Add mxs evk specific widgets */
snd_soc_dapm_new_controls(codec, mxs_evk_dapm_widgets,
ARRAY_SIZE(mxs_evk_dapm_widgets));
/* Set up mxs evk specific audio path audio_map */
snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
snd_soc_dapm_sync(codec);
/* default on */
mxs_evk_jack_func = 1;
mxs_evk_spk_func = 1;
return ret;
}
/* mxs evk dac/adc audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link mxs_evk_codec_dai = {
.name = "MXS ADC/DAC",
.stream_name = "MXS ADC/DAC",
.cpu_dai = &mxs_adc_dai,
.codec_dai = &mxs_codec_dai,
.init = mxs_evk_codec_init,
};
/* mxs evk audio machine driver */
static struct snd_soc_card snd_soc_card_mxs_evk = {
.name = "MXS EVK",
.platform = &mxs_soc_platform,
.dai_link = &mxs_evk_codec_dai,
.num_links = 1,
};
/* mxs evk audio subsystem */
static struct snd_soc_device mxs_evk_snd_devdata = {
.card = &snd_soc_card_mxs_evk,
.codec_dev = &soc_codec_dev_mxs,
};
static struct platform_device *mxs_evk_snd_device;
static int __init mxs_evk_adc_init(void)
{
int ret = 0;
mxs_evk_snd_device = platform_device_alloc("soc-audio", 0);
if (!mxs_evk_snd_device)
return -ENOMEM;
platform_set_drvdata(mxs_evk_snd_device,
&mxs_evk_snd_devdata);
mxs_evk_snd_devdata.dev = &mxs_evk_snd_device->dev;
mxs_evk_snd_device->dev.platform_data =
&mxs_evk_snd_devdata;
ret = platform_device_add(mxs_evk_snd_device);
if (ret)
platform_device_put(mxs_evk_snd_device);
return ret;
}
static void __exit mxs_evk_adc_exit(void)
{
platform_device_unregister(mxs_evk_snd_device);
}
module_init(mxs_evk_adc_init);
module_exit(mxs_evk_adc_exit);
MODULE_AUTHOR("Vladislav Buzov");
MODULE_DESCRIPTION("MXS EVK board ADC/DAC driver");
MODULE_LICENSE("GPL");
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