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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/sound/soc/au1x/db1200.c
10819 views
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/*

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 * DB1200 ASoC audio fabric support code.

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 *

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 * (c) 2008-9 Manuel Lauss <[email protected]>

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 *

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 */

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#include <linux/module.h>

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#include <linux/moduleparam.h>

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#include <linux/timer.h>

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#include <linux/interrupt.h>

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#include <linux/platform_device.h>

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#include <sound/core.h>

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#include <sound/pcm.h>

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#include <sound/soc.h>

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#include <asm/mach-au1x00/au1000.h>

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#include <asm/mach-au1x00/au1xxx_psc.h>

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#include <asm/mach-au1x00/au1xxx_dbdma.h>

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#include <asm/mach-db1x00/bcsr.h>

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#include "../codecs/wm8731.h"

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#include "psc.h"

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/*-------------------------  AC97 PART  ---------------------------*/

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static struct snd_soc_dai_link db1200_ac97_dai = {

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	.name		= "AC97",

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	.stream_name	= "AC97 HiFi",

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	.codec_dai_name	= "ac97-hifi",

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	.cpu_dai_name	= "au1xpsc_ac97.1",

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	.platform_name	= "au1xpsc-pcm.1",

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	.codec_name	= "ac97-codec.1",

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};

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static struct snd_soc_card db1200_ac97_machine = {

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	.name		= "DB1200_AC97",

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	.dai_link	= &db1200_ac97_dai,

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	.num_links	= 1,

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};

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/*-------------------------  I2S PART  ---------------------------*/

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static int db1200_i2s_startup(struct snd_pcm_substream *substream)

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{

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	struct snd_soc_pcm_runtime *rtd = substream->private_data;

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	struct snd_soc_dai *codec_dai = rtd->codec_dai;

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	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;

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	int ret;

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	/* WM8731 has its own 12MHz crystal */

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	snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,

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				12000000, SND_SOC_CLOCK_IN);

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	/* codec is bitclock and lrclk master */

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	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_LEFT_J |

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			SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);

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	if (ret < 0)

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		goto out;

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	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_LEFT_J |

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			SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);

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	if (ret < 0)

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		goto out;

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	ret = 0;

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out:

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	return ret;

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}

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static struct snd_soc_ops db1200_i2s_wm8731_ops = {

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	.startup	= db1200_i2s_startup,

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};

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static struct snd_soc_dai_link db1200_i2s_dai = {

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	.name		= "WM8731",

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	.stream_name	= "WM8731 PCM",

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	.codec_dai_name	= "wm8731-hifi",

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	.cpu_dai_name	= "au1xpsc_i2s.1",

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	.platform_name	= "au1xpsc-pcm.1",

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	.codec_name	= "wm8731.0-001b",

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	.ops		= &db1200_i2s_wm8731_ops,

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};

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static struct snd_soc_card db1200_i2s_machine = {

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	.name		= "DB1200_I2S",

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	.dai_link	= &db1200_i2s_dai,

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	.num_links	= 1,

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};

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/*-------------------------  COMMON PART  ---------------------------*/

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static struct platform_device *db1200_asoc_dev;

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static int __init db1200_audio_load(void)

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{

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	int ret;

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	ret = -ENOMEM;

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	db1200_asoc_dev = platform_device_alloc("soc-audio", 1); /* PSC1 */

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	if (!db1200_asoc_dev)

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		goto out;

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	/* DB1200 board setup set PSC1MUX to preferred audio device */

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	if (bcsr_read(BCSR_RESETS) & BCSR_RESETS_PSC1MUX)

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		platform_set_drvdata(db1200_asoc_dev, &db1200_i2s_machine);

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	else

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		platform_set_drvdata(db1200_asoc_dev, &db1200_ac97_machine);

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	ret = platform_device_add(db1200_asoc_dev);

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	if (ret) {

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		platform_device_put(db1200_asoc_dev);

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		db1200_asoc_dev = NULL;

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	}

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out:

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	return ret;

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}

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static void __exit db1200_audio_unload(void)

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{

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	platform_device_unregister(db1200_asoc_dev);

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}

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module_init(db1200_audio_load);

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module_exit(db1200_audio_unload);

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MODULE_LICENSE("GPL");

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MODULE_DESCRIPTION("DB1200 ASoC audio support");

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MODULE_AUTHOR("Manuel Lauss");

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