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/*
* DB1200 ASoC audio fabric support code.
*
* (c) 2008-9 Manuel Lauss <manuel.lauss@gmail.com>
*
*/
#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-au1x00/au1000.h>
#include <asm/mach-au1x00/au1xxx_psc.h>
#include <asm/mach-au1x00/au1xxx_dbdma.h>
#include <asm/mach-db1x00/bcsr.h>
#include "../codecs/wm8731.h"
#include "psc.h"
/*------------------------- AC97 PART ---------------------------*/
static struct snd_soc_dai_link db1200_ac97_dai = {
.name = "AC97",
.stream_name = "AC97 HiFi",
.cpu_dai_name = "au1xpsc-ac97",
.codec_dai_name = "ac97-hifi",
.platform_name = "au1xpsc-pcm-audio",
.codec_name = "ac97-codec",
};
static struct snd_soc_card db1200_ac97_machine = {
.name = "DB1200_AC97",
.dai_link = &db1200_ac97_dai,
.num_links = 1,
};
/*------------------------- I2S PART ---------------------------*/
static int db1200_i2s_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret;
/* WM8731 has its own 12MHz crystal */
snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
12000000, SND_SOC_CLOCK_IN);
/* codec is bitclock and lrclk master */
ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_LEFT_J |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0)
goto out;
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_LEFT_J |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0)
goto out;
ret = 0;
out:
return ret;
}
static struct snd_soc_ops db1200_i2s_wm8731_ops = {
.startup = db1200_i2s_startup,
};
static struct snd_soc_dai_link db1200_i2s_dai = {
.name = "WM8731",
.stream_name = "WM8731 PCM",
.cpu_dai_name = "au1xpsc",
.codec_dai_name = "wm8731-hifi"
.platform_name = "au1xpsc-pcm-audio",
.codec_name = "wm8731-codec.0-001a",
.ops = &db1200_i2s_wm8731_ops,
};
static struct snd_soc_card db1200_i2s_machine = {
.name = "DB1200_I2S",
.dai_link = &db1200_i2s_dai,
.num_links = 1,
};
/*------------------------- COMMON PART ---------------------------*/
static struct platform_device *db1200_asoc_dev;
static int __init db1200_audio_load(void)
{
int ret;
ret = -ENOMEM;
db1200_asoc_dev = platform_device_alloc("soc-audio", -1);
if (!db1200_asoc_dev)
goto out;
/* DB1200 board setup set PSC1MUX to preferred audio device */
if (bcsr_read(BCSR_RESETS) & BCSR_RESETS_PSC1MUX)
platform_set_drvdata(db1200_asoc_dev, &db1200_i2s_machine);
else
platform_set_drvdata(db1200_asoc_dev, &db1200_ac97_machine);
ret = platform_device_add(db1200_asoc_dev);
if (ret) {
platform_device_put(db1200_asoc_dev);
db1200_asoc_dev = NULL;
}
out:
return ret;
}
static void __exit db1200_audio_unload(void)
{
platform_device_unregister(db1200_asoc_dev);
}
module_init(db1200_audio_load);
module_exit(db1200_audio_unload);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("DB1200 ASoC audio support");
MODULE_AUTHOR("Manuel Lauss");
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