64089b84ab
Currently this is done at module probe time since ASoC ties in codec device probe to the instantiation of the entire ASoC device. Subsequent patches will refactor the codec drivers to handle probing separately. Note that the core does not yet use this information. AC97 is special since the codec is controlled over the AC97 link but we want to give the machine driver a chance to set up the system before trying to instantiate since it may need to do configuration before the AC97 link will operate Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
115 lines
2.7 KiB
C
115 lines
2.7 KiB
C
/*
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* ad73311.c -- ALSA Soc AD73311 codec support
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*
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* Copyright: Analog Device Inc.
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* Author: Cliff Cai <cliff.cai@analog.com>
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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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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/device.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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#include "ad73311.h"
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struct snd_soc_dai ad73311_dai = {
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.name = "AD73311",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 1,
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.channels_max = 1,
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.rates = SNDRV_PCM_RATE_8000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE, },
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.capture = {
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.stream_name = "Capture",
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.channels_min = 1,
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.channels_max = 1,
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.rates = SNDRV_PCM_RATE_8000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE, },
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};
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EXPORT_SYMBOL_GPL(ad73311_dai);
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static int ad73311_soc_probe(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec;
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int ret = 0;
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codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
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if (codec == NULL)
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return -ENOMEM;
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mutex_init(&codec->mutex);
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codec->name = "AD73311";
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codec->owner = THIS_MODULE;
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codec->dai = &ad73311_dai;
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codec->num_dai = 1;
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socdev->codec = codec;
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INIT_LIST_HEAD(&codec->dapm_widgets);
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INIT_LIST_HEAD(&codec->dapm_paths);
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/* register pcms */
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ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
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if (ret < 0) {
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printk(KERN_ERR "ad73311: failed to create pcms\n");
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goto pcm_err;
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}
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ret = snd_soc_init_card(socdev);
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if (ret < 0) {
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printk(KERN_ERR "ad73311: failed to register card\n");
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goto register_err;
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}
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return ret;
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register_err:
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snd_soc_free_pcms(socdev);
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pcm_err:
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kfree(socdev->codec);
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socdev->codec = NULL;
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return ret;
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}
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static int ad73311_soc_remove(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->codec;
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if (codec == NULL)
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return 0;
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snd_soc_free_pcms(socdev);
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kfree(codec);
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return 0;
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}
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struct snd_soc_codec_device soc_codec_dev_ad73311 = {
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.probe = ad73311_soc_probe,
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.remove = ad73311_soc_remove,
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};
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EXPORT_SYMBOL_GPL(soc_codec_dev_ad73311);
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static int __devinit ad73311_init(void)
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{
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return snd_soc_register_dai(&ad73311_dai);
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}
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module_init(ad73311_init);
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static void __exit ad73311_exit(void)
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{
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snd_soc_unregister_dai(&ad73311_dai);
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}
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module_exit(ad73311_exit);
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MODULE_DESCRIPTION("ASoC ad73311 driver");
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MODULE_AUTHOR("Cliff Cai ");
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MODULE_LICENSE("GPL");
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