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df82ca70bf
Remove rate constraints from generic ASoC AC'97 CODEC. Supported rates should be detected and constrained anyway by AC'97 generic code - was tested with VT1613 CODEC and iMX6 SSI controller. This way this driver can be used for platforms which don't need specialized AC'97 CODEC drivers while at the same avoiding code duplication from implementing equivalent functionality in a controller driver. Signed-off-by: Maciej Szmigiero <mail@maciej.szmigiero.name> Signed-off-by: Mark Brown <broonie@kernel.org>
153 lines
3.5 KiB
C
153 lines
3.5 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 const struct snd_soc_dapm_widget ac97_widgets[] = {
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SND_SOC_DAPM_INPUT("RX"),
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SND_SOC_DAPM_OUTPUT("TX"),
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};
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static const struct snd_soc_dapm_route ac97_routes[] = {
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{ "AC97 Capture", NULL, "RX" },
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{ "TX", NULL, "AC97 Playback" },
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};
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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_soc_codec *codec = dai->codec;
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struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(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(ac97, reg, substream->runtime->rate);
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}
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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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.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 = SNDRV_PCM_RATE_KNOT,
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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 = SNDRV_PCM_RATE_KNOT,
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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 int ac97_soc_probe(struct snd_soc_codec *codec)
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{
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struct snd_ac97 *ac97;
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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->component.card->snd_card, 0, soc_ac97_ops,
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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, &ac97);
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if (ret < 0)
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return ret;
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snd_soc_codec_set_drvdata(codec, ac97);
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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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struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
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snd_ac97_suspend(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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struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
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snd_ac97_resume(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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.probe = ac97_soc_probe,
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.suspend = ac97_soc_suspend,
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.resume = ac97_soc_resume,
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.dapm_widgets = ac97_widgets,
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.num_dapm_widgets = ARRAY_SIZE(ac97_widgets),
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.dapm_routes = ac97_routes,
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.num_dapm_routes = ARRAY_SIZE(ac97_routes),
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};
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static 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 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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},
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.probe = ac97_probe,
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.remove = 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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