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149 lines
3.5 KiB
149 lines
3.5 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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 <[email protected]> |
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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_component *component = dai->component; |
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struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component); |
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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_component *component) |
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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(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_component_set_drvdata(component, 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_component *component) |
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{ |
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struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component); |
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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_component *component) |
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{ |
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struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component); |
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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 const struct snd_soc_component_driver soc_component_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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.idle_bias_on = 1, |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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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 devm_snd_soc_register_component(&pdev->dev, |
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&soc_component_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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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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