release/src-rt-6.x.4708/linux/linux-2.6.36/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/slab.h>
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/device.h>
  18 #include <sound/core.h>
  19 #include <sound/pcm.h>
  20 #include <sound/ac97_codec.h>
  21 #include <sound/initval.h>
  22 #include <sound/soc.h>
  23
  24 #include "ad73311.h"
  25
  26 struct snd_soc_dai ad73311_dai = {
  27         .name = "AD73311",
  28         .playback = {
  29                 .stream_name = "Playback",
  30                 .channels_min = 1,
  31                 .channels_max = 1,
  32                 .rates = SNDRV_PCM_RATE_8000,
  33                 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
  34         .capture = {
  35                 .stream_name = "Capture",
  36                 .channels_min = 1,
  37                 .channels_max = 1,
  38                 .rates = SNDRV_PCM_RATE_8000,
  39                 .formats = SNDRV_PCM_FMTBIT_S16_LE, },
  40 };
  41 EXPORT_SYMBOL_GPL(ad73311_dai);
  42
  43 static int ad73311_soc_probe(struct platform_device *pdev)
  44 {
  45         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
  46         struct snd_soc_codec *codec;
  47         int ret = 0;
  48
  49         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
  50         if (codec == NULL)
  51                 return -ENOMEM;
  52         mutex_init(&codec->mutex);
  53         codec->name = "AD73311";
  54         codec->owner = THIS_MODULE;
  55         codec->dai = &ad73311_dai;
  56         codec->num_dai = 1;
  57         socdev->card->codec = codec;
  58         INIT_LIST_HEAD(&codec->dapm_widgets);
  59         INIT_LIST_HEAD(&codec->dapm_paths);
  60
  61         /* register pcms */
  62         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
  63         if (ret < 0) {
  64                 printk(KERN_ERR "ad73311: failed to create pcms\n");
  65                 goto pcm_err;
  66         }
  67
  68         return ret;
  69
  70 pcm_err:
  71         kfree(socdev->card->codec);
  72         socdev->card->codec = NULL;
  73         return ret;
  74 }
  75
  76 static int ad73311_soc_remove(struct platform_device *pdev)
  77 {
  78         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
  79         struct snd_soc_codec *codec = socdev->card->codec;
  80
  81         if (codec == NULL)
  82                 return 0;
  83         snd_soc_free_pcms(socdev);
  84         kfree(codec);
  85         return 0;
  86 }
  87
  88 struct snd_soc_codec_device soc_codec_dev_ad73311 = {
  89         .probe =        ad73311_soc_probe,
  90         .remove =       ad73311_soc_remove,
  91 };
  92 EXPORT_SYMBOL_GPL(soc_codec_dev_ad73311);
  93
  94 static int __init ad73311_init(void)
  95 {
  96         return snd_soc_register_dai(&ad73311_dai);
  97 }
  98 module_init(ad73311_init);
  99
 100 static void __exit ad73311_exit(void)
 101 {
 102         snd_soc_unregister_dai(&ad73311_dai);
 103 }
 104 module_exit(ad73311_exit);
 105
 106 MODULE_DESCRIPTION("ASoC ad73311 driver");
 107 MODULE_AUTHOR("Cliff Cai ");
 108 MODULE_LICENSE("GPL");