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84b315ee89
The existence of this parameter is purely historical. None of the CODEC drivers uses it and we always pass in the same value anyway, so it should be safe to remove it. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
157 lines
3.7 KiB
C
157 lines
3.7 KiB
C
/*
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* ac97.c -- ALSA Soc AC97 codec support
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*
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* Copyright 2005 Wolfson Microelectronics PLC.
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* Author: Liam Girdwood <lrg@slimlogic.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* Generic AC97 support.
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*/
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/ac97_codec.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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static int ac97_prepare(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_codec *codec = rtd->codec;
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int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
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AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
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return snd_ac97_set_rate(codec->ac97, reg, runtime->rate);
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}
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#define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
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SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\
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SNDRV_PCM_RATE_48000)
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static const struct snd_soc_dai_ops ac97_dai_ops = {
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.prepare = ac97_prepare,
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};
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static struct snd_soc_dai_driver ac97_dai = {
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.name = "ac97-hifi",
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.ac97_control = 1,
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.playback = {
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.stream_name = "AC97 Playback",
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.channels_min = 1,
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.channels_max = 2,
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.rates = STD_AC97_RATES,
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.formats = SND_SOC_STD_AC97_FMTS,},
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.capture = {
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.stream_name = "AC97 Capture",
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.channels_min = 1,
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.channels_max = 2,
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.rates = STD_AC97_RATES,
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.formats = SND_SOC_STD_AC97_FMTS,},
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.ops = &ac97_dai_ops,
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};
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static unsigned int ac97_read(struct snd_soc_codec *codec,
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unsigned int reg)
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{
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return soc_ac97_ops.read(codec->ac97, reg);
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}
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static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
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unsigned int val)
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{
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soc_ac97_ops.write(codec->ac97, reg, val);
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return 0;
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}
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static int ac97_soc_probe(struct snd_soc_codec *codec)
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{
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struct snd_ac97_bus *ac97_bus;
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struct snd_ac97_template ac97_template;
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int ret;
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/* add codec as bus device for standard ac97 */
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ret = snd_ac97_bus(codec->card->snd_card, 0, &soc_ac97_ops, NULL, &ac97_bus);
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if (ret < 0)
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return ret;
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memset(&ac97_template, 0, sizeof(struct snd_ac97_template));
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ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int ac97_soc_remove(struct snd_soc_codec *codec)
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{
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return 0;
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}
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#ifdef CONFIG_PM
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static int ac97_soc_suspend(struct snd_soc_codec *codec)
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{
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snd_ac97_suspend(codec->ac97);
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return 0;
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}
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static int ac97_soc_resume(struct snd_soc_codec *codec)
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{
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snd_ac97_resume(codec->ac97);
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return 0;
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}
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#else
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#define ac97_soc_suspend NULL
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#define ac97_soc_resume NULL
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#endif
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static struct snd_soc_codec_driver soc_codec_dev_ac97 = {
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.write = ac97_write,
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.read = ac97_read,
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.probe = ac97_soc_probe,
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.remove = ac97_soc_remove,
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.suspend = ac97_soc_suspend,
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.resume = ac97_soc_resume,
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};
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static __devinit int ac97_probe(struct platform_device *pdev)
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{
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return snd_soc_register_codec(&pdev->dev,
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&soc_codec_dev_ac97, &ac97_dai, 1);
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}
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static int __devexit ac97_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_codec(&pdev->dev);
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return 0;
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}
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static struct platform_driver ac97_codec_driver = {
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.driver = {
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.name = "ac97-codec",
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.owner = THIS_MODULE,
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},
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.probe = ac97_probe,
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.remove = __devexit_p(ac97_remove),
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};
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module_platform_driver(ac97_codec_driver);
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MODULE_DESCRIPTION("Soc Generic AC97 driver");
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MODULE_AUTHOR("Liam Girdwood");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:ac97-codec");
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