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

/*
 * ac97.c  --  ALSA Soc AC97 codec support
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
 * Author: Liam Girdwood
 *         liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
 *
 *  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_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->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)

struct snd_soc_dai ac97_dai = {
	.name = "AC97 HiFi",
	.type = SND_SOC_DAI_AC97,
	.playback = {
		.stream_name = "AC97 Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = STD_AC97_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.capture = {
		.stream_name = "AC97 Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = STD_AC97_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.ops = {
		.prepare = ac97_prepare,},
};
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->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	if (!socdev->codec)
		return -ENOMEM;
	codec = socdev->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;

	ret = snd_soc_register_card(socdev);
	if (ret < 0)
		goto bus_err;
	return 0;

bus_err:
	snd_soc_free_pcms(socdev);

err:
	kfree(socdev->codec->reg_cache);
	kfree(socdev->codec);
	socdev->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->codec;

	if (!codec)
		return 0;

	snd_soc_free_pcms(socdev);
	kfree(socdev->codec->reg_cache);
	kfree(socdev->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->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->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.
	5	* Author: Liam Girdwood
	6	* liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*
dbc6b6ad RP	13	* Generic AC97 support.
	14	*/
	15
	16	#include <linux/init.h>
	17	#include <linux/kernel.h>
	18	#include <linux/device.h>
dbc6b6ad RP	19	#include <sound/core.h>
	20	#include <sound/pcm.h>
	21	#include <sound/ac97_codec.h>
	22	#include <sound/initval.h>
	23	#include <sound/soc.h>
dbac7cb8	24	#include "ac97.h"
dbc6b6ad	25
5a8ec343	26	#define AC97_VERSION "0.6"
dbc6b6ad RP	27
	28	static int ac97_prepare(struct snd_pcm_substream *substream)
	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;
	33	struct snd_soc_codec *codec = socdev->codec;
	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
e550e17f	44	struct snd_soc_dai ac97_dai = {
dbc6b6ad	45	.name = "AC97 HiFi",
a68660e0	46	.type = SND_SOC_DAI_AC97,
dbc6b6ad RP	47	.playback = {
	48	.stream_name = "AC97 Playback",
	49	.channels_min = 1,
5a8ec343 LG	50	.channels_max = 2,
	51	.rates = STD_AC97_RATES,
	52	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
dbc6b6ad RP	53	.capture = {
	54	.stream_name = "AC97 Capture",
	55	.channels_min = 1,
5a8ec343 LG	56	.channels_max = 2,
	57	.rates = STD_AC97_RATES,
	58	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
dbc6b6ad RP	59	.ops = {
dbc6b6ad RP	60	.prepare = ac97_prepare,},
dbc6b6ad	61	};
5d0cedee	62	EXPORT_SYMBOL_GPL(ac97_dai);
dbc6b6ad RP	63
	64	static unsigned int ac97_read(struct snd_soc_codec *codec,
	65	unsigned int reg)
	66	{
	67	return soc_ac97_ops.read(codec->ac97, reg);
	68	}
	69
	70	static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
	71	unsigned int val)
	72	{
	73	soc_ac97_ops.write(codec->ac97, reg, val);
	74	return 0;
	75	}
	76
	77	static int ac97_soc_probe(struct platform_device *pdev)
	78	{
	79	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	80	struct snd_soc_codec *codec;
	81	struct snd_ac97_bus *ac97_bus;
	82	struct snd_ac97_template ac97_template;
	83	int ret = 0;
	84
	85	printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION);
	86
	87	socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
24c053e7	88	if (!socdev->codec)
dbc6b6ad RP	89	return -ENOMEM;
	90	codec = socdev->codec;
	91	mutex_init(&codec->mutex);
	92
	93	codec->name = "AC97";
	94	codec->owner = THIS_MODULE;
	95	codec->dai = &ac97_dai;
	96	codec->num_dai = 1;
	97	codec->write = ac97_write;
	98	codec->read = ac97_read;
	99	INIT_LIST_HEAD(&codec->dapm_widgets);
	100	INIT_LIST_HEAD(&codec->dapm_paths);
	101
	102	/* register pcms */
	103	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
24c053e7	104	if (ret < 0)
dbc6b6ad RP	105	goto err;
	106
	107	/* add codec as bus device for standard ac97 */
	108	ret = snd_ac97_bus(codec->card, 0, &soc_ac97_ops, NULL, &ac97_bus);
24c053e7	109	if (ret < 0)
dbc6b6ad RP	110	goto bus_err;
	111
	112	memset(&ac97_template, 0, sizeof(struct snd_ac97_template));
	113	ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97);
24c053e7	114	if (ret < 0)
dbc6b6ad RP	115	goto bus_err;
	116
	117	ret = snd_soc_register_card(socdev);
	118	if (ret < 0)
	119	goto bus_err;
	120	return 0;
	121
	122	bus_err:
	123	snd_soc_free_pcms(socdev);
	124
	125	err:
	126	kfree(socdev->codec->reg_cache);
	127	kfree(socdev->codec);
	128	socdev->codec = NULL;
	129	return ret;
	130	}
	131
	132	static int ac97_soc_remove(struct platform_device *pdev)
	133	{
	134	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	135	struct snd_soc_codec *codec = socdev->codec;
	136
24c053e7	137	if (!codec)
dbc6b6ad RP	138	return 0;
	139
	140	snd_soc_free_pcms(socdev);
	141	kfree(socdev->codec->reg_cache);
	142	kfree(socdev->codec);
	143
	144	return 0;
	145	}
	146
3f775987 ML	147	#ifdef CONFIG_PM
	148	static int ac97_soc_suspend(struct platform_device *pdev, pm_message_t msg)
	149	{
	150	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	151
	152	snd_ac97_suspend(socdev->codec->ac97);
	153
	154	return 0;
	155	}
	156
	157	static int ac97_soc_resume(struct platform_device *pdev)
	158	{
	159	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	160
	161	snd_ac97_resume(socdev->codec->ac97);
	162
	163	return 0;
	164	}
	165	#else
	166	#define ac97_soc_suspend NULL
	167	#define ac97_soc_resume NULL
	168	#endif
	169
24c053e7	170	struct snd_soc_codec_device soc_codec_dev_ac97 = {
dbc6b6ad RP	171	.probe = ac97_soc_probe,
dbc6b6ad RP	172	.remove = ac97_soc_remove,
3f775987 ML	173	.suspend = ac97_soc_suspend,
3f775987 ML	174	.resume = ac97_soc_resume,
dbc6b6ad	175	};
dbc6b6ad RP	176	EXPORT_SYMBOL_GPL(soc_codec_dev_ac97);
	177
	178	MODULE_DESCRIPTION("Soc Generic AC97 driver");
	179	MODULE_AUTHOR("Liam Girdwood");
	180	MODULE_LICENSE("GPL");