mirror of https://gitee.com/openkylin/linux.git
169 lines
3.7 KiB
C
169 lines
3.7 KiB
C
/*
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* wm8727.c
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*
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* Created on: 15-Oct-2009
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* Author: neil.jones@imgtec.com
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*
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* Copyright (C) 2009 Imagination Technologies Ltd.
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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/slab.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 "wm8727.h"
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/*
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* Note this is a simple chip with no configuration interface, sample rate is
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* determined automatically by examining the Master clock and Bit clock ratios
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*/
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#define WM8727_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 |\
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SNDRV_PCM_RATE_192000)
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struct snd_soc_dai wm8727_dai = {
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.name = "WM8727",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 2,
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.channels_max = 2,
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.rates = WM8727_RATES,
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
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},
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};
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EXPORT_SYMBOL_GPL(wm8727_dai);
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static struct snd_soc_codec *wm8727_codec;
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static int wm8727_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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int ret = 0;
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BUG_ON(!wm8727_codec);
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socdev->card->codec = wm8727_codec;
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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 "wm8727: failed to create pcms\n");
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goto pcm_err;
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}
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return ret;
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pcm_err:
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kfree(socdev->card->codec);
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socdev->card->codec = NULL;
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return ret;
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}
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static int wm8727_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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snd_soc_free_pcms(socdev);
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return 0;
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}
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struct snd_soc_codec_device soc_codec_dev_wm8727 = {
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.probe = wm8727_soc_probe,
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.remove = wm8727_soc_remove,
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};
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EXPORT_SYMBOL_GPL(soc_codec_dev_wm8727);
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static __devinit int wm8727_platform_probe(struct platform_device *pdev)
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{
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struct snd_soc_codec *codec;
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int ret;
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if (wm8727_codec) {
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dev_err(&pdev->dev, "Another WM8727 is registered\n");
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return -EBUSY;
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}
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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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wm8727_codec = codec;
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platform_set_drvdata(pdev, codec);
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mutex_init(&codec->mutex);
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codec->dev = &pdev->dev;
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codec->name = "WM8727";
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codec->owner = THIS_MODULE;
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codec->dai = &wm8727_dai;
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codec->num_dai = 1;
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INIT_LIST_HEAD(&codec->dapm_widgets);
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INIT_LIST_HEAD(&codec->dapm_paths);
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wm8727_dai.dev = &pdev->dev;
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ret = snd_soc_register_codec(codec);
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if (ret != 0) {
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dev_err(&pdev->dev, "Failed to register CODEC: %d\n", ret);
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goto err;
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}
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ret = snd_soc_register_dai(&wm8727_dai);
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if (ret != 0) {
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dev_err(&pdev->dev, "Failed to register DAI: %d\n", ret);
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goto err_codec;
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}
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err_codec:
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snd_soc_unregister_codec(codec);
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err:
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kfree(codec);
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return ret;
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}
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static int __devexit wm8727_platform_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_dai(&wm8727_dai);
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snd_soc_unregister_codec(platform_get_drvdata(pdev));
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return 0;
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}
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static struct platform_driver wm8727_codec_driver = {
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.driver = {
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.name = "wm8727-codec",
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.owner = THIS_MODULE,
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},
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.probe = wm8727_platform_probe,
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.remove = __devexit_p(wm8727_platform_remove),
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};
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static int __init wm8727_init(void)
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{
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return platform_driver_register(&wm8727_codec_driver);
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}
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module_init(wm8727_init);
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static void __exit wm8727_exit(void)
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{
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platform_driver_unregister(&wm8727_codec_driver);
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}
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module_exit(wm8727_exit);
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MODULE_DESCRIPTION("ASoC wm8727 driver");
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MODULE_AUTHOR("Neil Jones");
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MODULE_LICENSE("GPL");
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