155 lines
3.6 KiB
C
155 lines
3.6 KiB
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 <linux/module.h>
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/ac97_codec.h>
|
|
#include <sound/initval.h>
|
|
#include <sound/soc.h>
|
|
|
|
static const struct snd_soc_dapm_widget ac97_widgets[] = {
|
|
SND_SOC_DAPM_INPUT("RX"),
|
|
SND_SOC_DAPM_OUTPUT("TX"),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_route ac97_routes[] = {
|
|
{ "AC97 Capture", NULL, "RX" },
|
|
{ "TX", NULL, "AC97 Playback" },
|
|
};
|
|
|
|
static int ac97_prepare(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct snd_soc_codec *codec = dai->codec;
|
|
struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
|
|
|
|
int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
|
|
AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
|
|
return snd_ac97_set_rate(ac97, reg, substream->runtime->rate);
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops ac97_dai_ops = {
|
|
.prepare = ac97_prepare,
|
|
};
|
|
|
|
static struct snd_soc_dai_driver ac97_dai = {
|
|
.name = "ac97-hifi",
|
|
.playback = {
|
|
.stream_name = "AC97 Playback",
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rates = SNDRV_PCM_RATE_KNOT,
|
|
.formats = SND_SOC_STD_AC97_FMTS,},
|
|
.capture = {
|
|
.stream_name = "AC97 Capture",
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rates = SNDRV_PCM_RATE_KNOT,
|
|
.formats = SND_SOC_STD_AC97_FMTS,},
|
|
.ops = &ac97_dai_ops,
|
|
};
|
|
|
|
static int ac97_soc_probe(struct snd_soc_codec *codec)
|
|
{
|
|
struct snd_ac97 *ac97;
|
|
struct snd_ac97_bus *ac97_bus;
|
|
struct snd_ac97_template ac97_template;
|
|
int ret;
|
|
|
|
/* add codec as bus device for standard ac97 */
|
|
ret = snd_ac97_bus(codec->component.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, &ac97);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
snd_soc_codec_set_drvdata(codec, ac97);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int ac97_soc_suspend(struct snd_soc_codec *codec)
|
|
{
|
|
struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
|
|
|
|
snd_ac97_suspend(ac97);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ac97_soc_resume(struct snd_soc_codec *codec)
|
|
{
|
|
|
|
struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
|
|
|
|
snd_ac97_resume(ac97);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define ac97_soc_suspend NULL
|
|
#define ac97_soc_resume NULL
|
|
#endif
|
|
|
|
static const struct snd_soc_codec_driver soc_codec_dev_ac97 = {
|
|
.probe = ac97_soc_probe,
|
|
.suspend = ac97_soc_suspend,
|
|
.resume = ac97_soc_resume,
|
|
|
|
.component_driver = {
|
|
.dapm_widgets = ac97_widgets,
|
|
.num_dapm_widgets = ARRAY_SIZE(ac97_widgets),
|
|
.dapm_routes = ac97_routes,
|
|
.num_dapm_routes = ARRAY_SIZE(ac97_routes),
|
|
},
|
|
};
|
|
|
|
static int ac97_probe(struct platform_device *pdev)
|
|
{
|
|
return snd_soc_register_codec(&pdev->dev,
|
|
&soc_codec_dev_ac97, &ac97_dai, 1);
|
|
}
|
|
|
|
static int 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",
|
|
},
|
|
|
|
.probe = ac97_probe,
|
|
.remove = ac97_remove,
|
|
};
|
|
|
|
module_platform_driver(ac97_codec_driver);
|
|
|
|
MODULE_DESCRIPTION("Soc Generic AC97 driver");
|
|
MODULE_AUTHOR("Liam Girdwood");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:ac97-codec");
|