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