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  *  Revision history
  13  *    25th Sep 2008   Initial version.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/device.h>
  20 #include <sound/core.h>
  21 #include <sound/pcm.h>
  22 #include <sound/ac97_codec.h>
  23 #include <sound/initval.h>
  24 #include <sound/soc.h>
  25
  26 #include "ad73311.h"
  27
  28 struct snd_soc_dai ad73311_dai = {
  29         .name = "AD73311",
  30         .playback = {
  31                 .stream_name = "Playback",
  32                 .channels_min = 1,
  33                 .channels_max = 1,
  34                 .rates = SNDRV_PCM_RATE_8000,
  35                 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
  36         .capture = {
  37                 .stream_name = "Capture",
  38                 .channels_min = 1,
  39                 .channels_max = 1,
  40                 .rates = SNDRV_PCM_RATE_8000,
  41                 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
  42 };
  43 EXPORT_SYMBOL_GPL(ad73311_dai);
  44
  45 static int ad73311_soc_probe(struct platform_device *pdev)
  46 {
  47         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
  48         struct snd_soc_codec *codec;
  49         int ret = 0;
  50
  51         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
  52         if (codec == NULL)
  53                 return -ENOMEM;
  54         mutex_init(&codec->mutex);
  55         codec->name = "AD73311";
  56         codec->owner = THIS_MODULE;
  57         codec->dai = &ad73311_dai;
  58         codec->num_dai = 1;
  59         socdev->codec = codec;
  60         INIT_LIST_HEAD(&codec->dapm_widgets);
  61         INIT_LIST_HEAD(&codec->dapm_paths);
  62
  63         /* register pcms */
  64         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
  65         if (ret < 0) {
  66                 printk(KERN_ERR "ad73311: failed to create pcms\n");
  67                 goto pcm_err;
  68         }
  69
  70         ret = snd_soc_init_card(socdev);
  71         if (ret < 0) {
  72                 printk(KERN_ERR "ad73311: failed to register card\n");
  73                 goto register_err;
  74         }
  75
  76         return ret;
  77
  78 register_err:
  79         snd_soc_free_pcms(socdev);
  80 pcm_err:
  81         kfree(socdev->codec);
  82         socdev->codec = NULL;
  83         return ret;
  84 }
  85
  86 static int ad73311_soc_remove(struct platform_device *pdev)
  87 {
  88         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
  89         struct snd_soc_codec *codec = socdev->codec;
  90
  91         if (codec == NULL)
  92                 return 0;
  93         snd_soc_free_pcms(socdev);
  94         kfree(codec);
  95         return 0;
  96 }
  97
  98 struct snd_soc_codec_device soc_codec_dev_ad73311 = {
  99         .probe =        ad73311_soc_probe,
 100         .remove =       ad73311_soc_remove,
 101 };
 102 EXPORT_SYMBOL_GPL(soc_codec_dev_ad73311);
 103
 104 MODULE_DESCRIPTION("ASoC ad73311 driver");
 105 MODULE_AUTHOR("Cliff Cai ");
 106 MODULE_LICENSE("GPL");