linux/sound/soc/au1x/db1200.c

/*
 * DB1200 ASoC audio fabric support code.
 *
 * (c) 2008-2011 Manuel Lauss <manuel.lauss@googlemail.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 <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"

static struct platform_device_id db1200_pids[] = {
	{
		.name		= "db1200-ac97",
		.driver_data	= 0,
	}, {
		.name		= "db1200-i2s",
		.driver_data	= 1,
	},
	{},
};

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

static struct snd_soc_dai_link db1200_ac97_dai = {
	.name		= "AC97",
	.stream_name	= "AC97 HiFi",
	.codec_dai_name	= "ac97-hifi",
	.cpu_dai_name	= "au1xpsc_ac97.1",
	.platform_name	= "au1xpsc-pcm.1",
	.codec_name	= "ac97-codec.1",
};

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",
	.codec_dai_name	= "wm8731-hifi",
	.cpu_dai_name	= "au1xpsc_i2s.1",
	.platform_name	= "au1xpsc-pcm.1",
	.codec_name	= "wm8731.0-001b",
	.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 snd_soc_card *db1200_cards[] __devinitdata = {
	&db1200_ac97_machine,
	&db1200_i2s_machine,
};

static int __devinit db1200_audio_probe(struct platform_device *pdev)
{
	const struct platform_device_id *pid = platform_get_device_id(pdev);
	struct snd_soc_card *card;

	card = db1200_cards[pid->driver_data];
	card->dev = &pdev->dev;
	return snd_soc_register_card(card);
}

static int __devexit db1200_audio_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);
	snd_soc_unregister_card(card);
	return 0;
}

static struct platform_driver db1200_audio_driver = {
	.driver	= {
		.name	= "db1200-ac97",
		.owner	= THIS_MODULE,
		.pm	= &snd_soc_pm_ops,
	},
	.id_table	= db1200_pids,
	.probe		= db1200_audio_probe,
	.remove		= __devexit_p(db1200_audio_remove),
};

static int __init db1200_audio_load(void)
{
	return platform_driver_register(&db1200_audio_driver);
}

static void __exit db1200_audio_unload(void)
{
	platform_driver_unregister(&db1200_audio_driver);
}

module_init(db1200_audio_load);
module_exit(db1200_audio_unload);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("DB1200 ASoC audio support");
MODULE_AUTHOR("Manuel Lauss");