sound/soc/codecs/ad73311.c

   1 /*
   2  * ad73311.c  --  ALSA Soc AD73311 codec support
   3  *
   4  * Copyright:   Analog Device Inc.
   5  * Author:      Cliff Cai <cliff.cai@analog.com>
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  */
  12
  13 #include <linux/init.h>
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/device.h>
  17 #include <sound/core.h>
  18 #include <sound/pcm.h>
  19 #include <sound/ac97_codec.h>
  20 #include <sound/initval.h>
  21 #include <sound/soc.h>
  22
  23 #include "ad73311.h"
  24
  25 struct snd_soc_dai ad73311_dai = {
  26         .name = "AD73311",
  27         .playback = {
  28                 .stream_name = "Playback",
  29                 .channels_min = 1,
  30                 .channels_max = 1,
  31                 .rates = SNDRV_PCM_RATE_8000,
  32                 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
  33         .capture = {
  34                 .stream_name = "Capture",
  35                 .channels_min = 1,
  36                 .channels_max = 1,
  37                 .rates = SNDRV_PCM_RATE_8000,
  38                 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
  39 };
  40 EXPORT_SYMBOL_GPL(ad73311_dai);
  41
  42 static int ad73311_soc_probe(struct platform_device *pdev)
  43 {
  44         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
  45         struct snd_soc_codec *codec;
  46         int ret = 0;
  47
  48         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
  49         if (codec == NULL)
  50                 return -ENOMEM;
  51         mutex_init(&codec->mutex);
  52         codec->name = "AD73311";
  53         codec->owner = THIS_MODULE;
  54         codec->dai = &ad73311_dai;
  55         codec->num_dai = 1;
  56         socdev->card->codec = codec;
  57         INIT_LIST_HEAD(&codec->dapm_widgets);
  58         INIT_LIST_HEAD(&codec->dapm_paths);
  59
  60         /* register pcms */
  61         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
  62         if (ret < 0) {
  63                 printk(KERN_ERR "ad73311: failed to create pcms\n");
  64                 goto pcm_err;
  65         }
  66
  67         return ret;
  68
  69 pcm_err:
  70         kfree(socdev->card->codec);
  71         socdev->card->codec = NULL;
  72         return ret;
  73 }
  74
  75 static int ad73311_soc_remove(struct platform_device *pdev)
  76 {
  77         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
  78         struct snd_soc_codec *codec = socdev->card->codec;
  79
  80         if (codec == NULL)
  81                 return 0;
  82         snd_soc_free_pcms(socdev);
  83         kfree(codec);
  84         return 0;
  85 }
  86
  87 struct snd_soc_codec_device soc_codec_dev_ad73311 = {
  88         .probe =        ad73311_soc_probe,
  89         .remove =       ad73311_soc_remove,
  90 };
  91 EXPORT_SYMBOL_GPL(soc_codec_dev_ad73311);
  92
  93 static int __init ad73311_init(void)
  94 {
  95         return snd_soc_register_dai(&ad73311_dai);
  96 }
  97 module_init(ad73311_init);
  98
  99 static void __exit ad73311_exit(void)
 100 {
 101         snd_soc_unregister_dai(&ad73311_dai);
 102 }
 103 module_exit(ad73311_exit);
 104
 105 MODULE_DESCRIPTION("ASoC ad73311 driver");
 106 MODULE_AUTHOR("Cliff Cai ");
 107 MODULE_LICENSE("GPL");