[mirror_ubuntu-bionic-kernel.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/slab.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>

#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_codec *codec = rtd->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,
};

static struct snd_soc_dai_driver 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,
};

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 snd_soc_codec *codec)
{
	struct snd_ac97_bus *ac97_bus;
	struct snd_ac97_template ac97_template;
	int ret;

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

	ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
	if (ret < 0) {
		printk(KERN_ERR "ASoC: failed to init gen ac97 glue\n");
		return ret;
	}

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

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

	return 0;
}

static int ac97_soc_remove(struct snd_soc_codec *codec)
{
	return 0;
}

#ifdef CONFIG_PM
static int ac97_soc_suspend(struct snd_soc_codec *codec, pm_message_t msg)
{
	snd_ac97_suspend(codec->ac97);

	return 0;
}

static int ac97_soc_resume(struct snd_soc_codec *codec)
{
	snd_ac97_resume(codec->ac97);

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

static struct snd_soc_codec_driver soc_codec_dev_ac97 = {
	.write = ac97_write,
	.read = ac97_read,
	.probe = 	ac97_soc_probe,
	.remove = 	ac97_soc_remove,
	.suspend =	ac97_soc_suspend,
	.resume =	ac97_soc_resume,
};

static __devinit int ac97_probe(struct platform_device *pdev)
{
	return snd_soc_register_codec(&pdev->dev,
			&soc_codec_dev_ac97, &ac97_dai, 1);
}

static int __devexit ac97_remove(struct platform_device *pdev)
{
	snd_soc_unregister_codec(&pdev->dev);
	return 0;
}

static struct platform_driver ac97_codec_driver = {
	.driver = {
			.name = "ac97-codec",
			.owner = THIS_MODULE,
	},

	.probe = ac97_probe,
	.remove = __devexit_p(ac97_remove),
};

static int __init ac97_init(void)
{
	return platform_driver_register(&ac97_codec_driver);
}
module_init(ac97_init);

static void __exit ac97_exit(void)
{
	platform_driver_unregister(&ac97_codec_driver);
}
module_exit(ac97_exit);

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>
5a0e3ad6	16	#include <linux/slab.h>
dbc6b6ad RP	17	#include <linux/kernel.h>
dbc6b6ad RP	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>
	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;
f0fba2ad	32	struct snd_soc_codec *codec = rtd->codec;
dbc6b6ad RP	33
	34	int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
	35	AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
	36	return snd_ac97_set_rate(codec->ac97, reg, runtime->rate);
	37	}
	38
5a8ec343	39	#define STD_AC97_RATES (SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_11025 \|\
24c053e7 MB	40	SNDRV_PCM_RATE_22050 \| SNDRV_PCM_RATE_44100 \|\
24c053e7 MB	41	SNDRV_PCM_RATE_48000)
5a8ec343	42
6335d055 EM	43	static struct snd_soc_dai_ops ac97_dai_ops = {
	44	.prepare = ac97_prepare,
	45	};
	46
f0fba2ad LG	47	static struct snd_soc_dai_driver ac97_dai = {
f0fba2ad LG	48	.name = "ac97-hifi",
3ba9e10a	49	.ac97_control = 1,
dbc6b6ad RP	50	.playback = {
	51	.stream_name = "AC97 Playback",
	52	.channels_min = 1,
5a8ec343 LG	53	.channels_max = 2,
5a8ec343 LG	54	.rates = STD_AC97_RATES,
33f503c9	55	.formats = SND_SOC_STD_AC97_FMTS,},
dbc6b6ad RP	56	.capture = {
	57	.stream_name = "AC97 Capture",
	58	.channels_min = 1,
5a8ec343 LG	59	.channels_max = 2,
5a8ec343 LG	60	.rates = STD_AC97_RATES,
33f503c9	61	.formats = SND_SOC_STD_AC97_FMTS,},
6335d055	62	.ops = &ac97_dai_ops,
dbc6b6ad RP	63	};
	64
	65	static unsigned int ac97_read(struct snd_soc_codec *codec,
	66	unsigned int reg)
	67	{
	68	return soc_ac97_ops.read(codec->ac97, reg);
	69	}
	70
	71	static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
	72	unsigned int val)
	73	{
	74	soc_ac97_ops.write(codec->ac97, reg, val);
	75	return 0;
	76	}
	77
f0fba2ad	78	static int ac97_soc_probe(struct snd_soc_codec *codec)
dbc6b6ad	79	{
dbc6b6ad RP	80	struct snd_ac97_bus *ac97_bus;
dbc6b6ad RP	81	struct snd_ac97_template ac97_template;
f0fba2ad	82	int ret;
dbc6b6ad RP	83
	84	printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION);
	85
f0fba2ad LG	86	ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
	87	if (ret < 0) {
	88	printk(KERN_ERR "ASoC: failed to init gen ac97 glue\n");
	89	return ret;
	90	}
dbc6b6ad RP	91
dbc6b6ad RP	92	/* add codec as bus device for standard ac97 */
f0fba2ad	93	ret = snd_ac97_bus(codec->card->snd_card, 0, &soc_ac97_ops, NULL, &ac97_bus);
24c053e7	94	if (ret < 0)
f0fba2ad	95	return ret;
dbc6b6ad RP	96
	97	memset(&ac97_template, 0, sizeof(struct snd_ac97_template));
	98	ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97);
24c053e7	99	if (ret < 0)
f0fba2ad	100	return ret;
fb48e3c6	101
dbc6b6ad	102	return 0;
dbc6b6ad RP	103	}
dbc6b6ad RP	104
f0fba2ad	105	static int ac97_soc_remove(struct snd_soc_codec *codec)
dbc6b6ad	106	{
dbc6b6ad RP	107	return 0;
	108	}
	109
3f775987	110	#ifdef CONFIG_PM
f0fba2ad	111	static int ac97_soc_suspend(struct snd_soc_codec *codec, pm_message_t msg)
3f775987	112	{
f0fba2ad	113	snd_ac97_suspend(codec->ac97);
3f775987 ML	114
	115	return 0;
	116	}
	117
f0fba2ad	118	static int ac97_soc_resume(struct snd_soc_codec *codec)
3f775987	119	{
f0fba2ad	120	snd_ac97_resume(codec->ac97);
3f775987 ML	121
	122	return 0;
	123	}
	124	#else
	125	#define ac97_soc_suspend NULL
	126	#define ac97_soc_resume NULL
	127	#endif
	128
f0fba2ad LG	129	static struct snd_soc_codec_driver soc_codec_dev_ac97 = {
	130	.write = ac97_write,
	131	.read = ac97_read,
dbc6b6ad RP	132	.probe = ac97_soc_probe,
dbc6b6ad RP	133	.remove = ac97_soc_remove,
3f775987 ML	134	.suspend = ac97_soc_suspend,
3f775987 ML	135	.resume = ac97_soc_resume,
dbc6b6ad	136	};
f0fba2ad LG	137
	138	static __devinit int ac97_probe(struct platform_device *pdev)
	139	{
	140	return snd_soc_register_codec(&pdev->dev,
	141	&soc_codec_dev_ac97, &ac97_dai, 1);
	142	}
	143
	144	static int __devexit ac97_remove(struct platform_device *pdev)
	145	{
	146	snd_soc_unregister_codec(&pdev->dev);
	147	return 0;
	148	}
	149
	150	static struct platform_driver ac97_codec_driver = {
	151	.driver = {
	152	.name = "ac97-codec",
	153	.owner = THIS_MODULE,
	154	},
	155
	156	.probe = ac97_probe,
	157	.remove = __devexit_p(ac97_remove),
	158	};
	159
	160	static int __init ac97_init(void)
	161	{
	162	return platform_driver_register(&ac97_codec_driver);
	163	}
	164	module_init(ac97_init);
	165
	166	static void __exit ac97_exit(void)
	167	{
	168	platform_driver_unregister(&ac97_codec_driver);
	169	}
	170	module_exit(ac97_exit);
dbc6b6ad RP	171
	172	MODULE_DESCRIPTION("Soc Generic AC97 driver");
	173	MODULE_AUTHOR("Liam Girdwood");
	174	MODULE_LICENSE("GPL");