[deliverable/linux.git] / sound / soc / codecs / ac97.c

/*
 * ac97.c  --  ALSA Soc AC97 codec support
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 * Generic AC97 support.
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include "ac97.h"

#define AC97_VERSION "0.6"

static int ac97_prepare(struct snd_pcm_substream *substream,
			struct snd_soc_dai *dai)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
	struct snd_soc_codec *codec = socdev->card->codec;

	int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
		  AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
	return snd_ac97_set_rate(codec->ac97, reg, runtime->rate);
}

#define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
		SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\
		SNDRV_PCM_RATE_48000)

static struct snd_soc_dai_ops ac97_dai_ops = {
	.prepare	= ac97_prepare,
};

struct snd_soc_dai ac97_dai = {
	.name = "AC97 HiFi",
	.ac97_control = 1,
	.playback = {
		.stream_name = "AC97 Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = STD_AC97_RATES,
		.formats = SND_SOC_STD_AC97_FMTS,},
	.capture = {
		.stream_name = "AC97 Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = STD_AC97_RATES,
		.formats = SND_SOC_STD_AC97_FMTS,},
	.ops = &ac97_dai_ops,
};
EXPORT_SYMBOL_GPL(ac97_dai);

static unsigned int ac97_read(struct snd_soc_codec *codec,
	unsigned int reg)
{
	return soc_ac97_ops.read(codec->ac97, reg);
}

static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
	unsigned int val)
{
	soc_ac97_ops.write(codec->ac97, reg, val);
	return 0;
}

static int ac97_soc_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec;
	struct snd_ac97_bus *ac97_bus;
	struct snd_ac97_template ac97_template;
	int ret = 0;

	printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION);

	socdev->card->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	if (!socdev->card->codec)
		return -ENOMEM;
	codec = socdev->card->codec;
	mutex_init(&codec->mutex);

	codec->name = "AC97";
	codec->owner = THIS_MODULE;
	codec->dai = &ac97_dai;
	codec->num_dai = 1;
	codec->write = ac97_write;
	codec->read = ac97_read;
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	/* register pcms */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0)
		goto err;

	/* add codec as bus device for standard ac97 */
	ret = snd_ac97_bus(codec->card, 0, &soc_ac97_ops, NULL, &ac97_bus);
	if (ret < 0)
		goto bus_err;

	memset(&ac97_template, 0, sizeof(struct snd_ac97_template));
	ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97);
	if (ret < 0)
		goto bus_err;

	return 0;

bus_err:
	snd_soc_free_pcms(socdev);

err:
	kfree(socdev->card->codec);
	socdev->card->codec = NULL;
	return ret;
}

static int ac97_soc_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;

	if (!codec)
		return 0;

	snd_soc_free_pcms(socdev);
	kfree(socdev->card->codec);

	return 0;
}

#ifdef CONFIG_PM
static int ac97_soc_suspend(struct platform_device *pdev, pm_message_t msg)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	snd_ac97_suspend(socdev->card->codec->ac97);

	return 0;
}

static int ac97_soc_resume(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	snd_ac97_resume(socdev->card->codec->ac97);

	return 0;
}
#else
#define ac97_soc_suspend NULL
#define ac97_soc_resume NULL
#endif

struct snd_soc_codec_device soc_codec_dev_ac97 = {
	.probe = 	ac97_soc_probe,
	.remove = 	ac97_soc_remove,
	.suspend =	ac97_soc_suspend,
	.resume =	ac97_soc_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_ac97);

MODULE_DESCRIPTION("Soc Generic AC97 driver");
MODULE_AUTHOR("Liam Girdwood");
MODULE_LICENSE("GPL");
Commit	Line	Data
dbc6b6ad RP	1	/*
	2	* ac97.c -- ALSA Soc AC97 codec support
	3	*
	4	* Copyright 2005 Wolfson Microelectronics PLC.
d331124d	5	* Author: Liam Girdwood <lrg@slimlogic.co.uk>
dbc6b6ad RP	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the License, or (at your
	10	* option) any later version.
	11	*
dbc6b6ad RP	12	* Generic AC97 support.
	13	*/
	14
	15	#include <linux/init.h>
	16	#include <linux/kernel.h>
	17	#include <linux/device.h>
dbc6b6ad RP	18	#include <sound/core.h>
	19	#include <sound/pcm.h>
	20	#include <sound/ac97_codec.h>
	21	#include <sound/initval.h>
	22	#include <sound/soc.h>
dbac7cb8	23	#include "ac97.h"
dbc6b6ad	24
5a8ec343	25	#define AC97_VERSION "0.6"
dbc6b6ad	26
dee89c4d MB	27	static int ac97_prepare(struct snd_pcm_substream *substream,
dee89c4d MB	28	struct snd_soc_dai *dai)
dbc6b6ad RP	29	{
	30	struct snd_pcm_runtime *runtime = substream->runtime;
	31	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	32	struct snd_soc_device *socdev = rtd->socdev;
6627a653	33	struct snd_soc_codec *codec = socdev->card->codec;
dbc6b6ad RP	34
	35	int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
	36	AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
	37	return snd_ac97_set_rate(codec->ac97, reg, runtime->rate);
	38	}
	39
5a8ec343	40	#define STD_AC97_RATES (SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_11025 \|\
24c053e7 MB	41	SNDRV_PCM_RATE_22050 \| SNDRV_PCM_RATE_44100 \|\
24c053e7 MB	42	SNDRV_PCM_RATE_48000)
5a8ec343	43
6335d055 EM	44	static struct snd_soc_dai_ops ac97_dai_ops = {
	45	.prepare = ac97_prepare,
	46	};
	47
e550e17f	48	struct snd_soc_dai ac97_dai = {
dbc6b6ad	49	.name = "AC97 HiFi",
3ba9e10a	50	.ac97_control = 1,
dbc6b6ad RP	51	.playback = {
	52	.stream_name = "AC97 Playback",
	53	.channels_min = 1,
5a8ec343 LG	54	.channels_max = 2,
5a8ec343 LG	55	.rates = STD_AC97_RATES,
33f503c9	56	.formats = SND_SOC_STD_AC97_FMTS,},
dbc6b6ad RP	57	.capture = {
	58	.stream_name = "AC97 Capture",
	59	.channels_min = 1,
5a8ec343 LG	60	.channels_max = 2,
5a8ec343 LG	61	.rates = STD_AC97_RATES,
33f503c9	62	.formats = SND_SOC_STD_AC97_FMTS,},
6335d055	63	.ops = &ac97_dai_ops,
dbc6b6ad	64	};
5d0cedee	65	EXPORT_SYMBOL_GPL(ac97_dai);
dbc6b6ad RP	66
	67	static unsigned int ac97_read(struct snd_soc_codec *codec,
	68	unsigned int reg)
	69	{
	70	return soc_ac97_ops.read(codec->ac97, reg);
	71	}
	72
	73	static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
	74	unsigned int val)
	75	{
	76	soc_ac97_ops.write(codec->ac97, reg, val);
	77	return 0;
	78	}
	79
	80	static int ac97_soc_probe(struct platform_device *pdev)
	81	{
	82	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	83	struct snd_soc_codec *codec;
	84	struct snd_ac97_bus *ac97_bus;
	85	struct snd_ac97_template ac97_template;
	86	int ret = 0;
	87
	88	printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION);
	89
6627a653 MB	90	socdev->card->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
6627a653 MB	91	if (!socdev->card->codec)
dbc6b6ad	92	return -ENOMEM;
6627a653	93	codec = socdev->card->codec;
dbc6b6ad RP	94	mutex_init(&codec->mutex);
	95
	96	codec->name = "AC97";
	97	codec->owner = THIS_MODULE;
	98	codec->dai = &ac97_dai;
	99	codec->num_dai = 1;
	100	codec->write = ac97_write;
	101	codec->read = ac97_read;
	102	INIT_LIST_HEAD(&codec->dapm_widgets);
	103	INIT_LIST_HEAD(&codec->dapm_paths);
	104
	105	/* register pcms */
	106	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
24c053e7	107	if (ret < 0)
dbc6b6ad RP	108	goto err;
	109
	110	/* add codec as bus device for standard ac97 */
	111	ret = snd_ac97_bus(codec->card, 0, &soc_ac97_ops, NULL, &ac97_bus);
24c053e7	112	if (ret < 0)
dbc6b6ad RP	113	goto bus_err;
	114
	115	memset(&ac97_template, 0, sizeof(struct snd_ac97_template));
	116	ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97);
24c053e7	117	if (ret < 0)
dbc6b6ad RP	118	goto bus_err;
dbc6b6ad RP	119
dbc6b6ad RP	120	return 0;
	121
	122	bus_err:
	123	snd_soc_free_pcms(socdev);
	124
	125	err:
6627a653 MB	126	kfree(socdev->card->codec);
6627a653 MB	127	socdev->card->codec = NULL;
dbc6b6ad RP	128	return ret;
	129	}
	130
	131	static int ac97_soc_remove(struct platform_device *pdev)
	132	{
	133	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	134	struct snd_soc_codec *codec = socdev->card->codec;
dbc6b6ad	135
24c053e7	136	if (!codec)
dbc6b6ad RP	137	return 0;
	138
	139	snd_soc_free_pcms(socdev);
6627a653	140	kfree(socdev->card->codec);
dbc6b6ad RP	141
	142	return 0;
	143	}
	144
3f775987 ML	145	#ifdef CONFIG_PM
	146	static int ac97_soc_suspend(struct platform_device *pdev, pm_message_t msg)
	147	{
	148	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	149
6627a653	150	snd_ac97_suspend(socdev->card->codec->ac97);
3f775987 ML	151
	152	return 0;
	153	}
	154
	155	static int ac97_soc_resume(struct platform_device *pdev)
	156	{
	157	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	158
6627a653	159	snd_ac97_resume(socdev->card->codec->ac97);
3f775987 ML	160
	161	return 0;
	162	}
	163	#else
	164	#define ac97_soc_suspend NULL
	165	#define ac97_soc_resume NULL
	166	#endif
	167
24c053e7	168	struct snd_soc_codec_device soc_codec_dev_ac97 = {
dbc6b6ad RP	169	.probe = ac97_soc_probe,
dbc6b6ad RP	170	.remove = ac97_soc_remove,
3f775987 ML	171	.suspend = ac97_soc_suspend,
3f775987 ML	172	.resume = ac97_soc_resume,
dbc6b6ad	173	};
dbc6b6ad RP	174	EXPORT_SYMBOL_GPL(soc_codec_dev_ac97);
	175
	176	MODULE_DESCRIPTION("Soc Generic AC97 driver");
	177	MODULE_AUTHOR("Liam Girdwood");
	178	MODULE_LICENSE("GPL");