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ad73311.c

/*
 * ad73311.c  --  ALSA Soc AD73311 codec support
 *
 * Copyright:     Analog Device Inc.
 * Author:  Cliff Cai <cliff.cai@analog.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#include <sound/soc.h>

#include "ad73311.h"

struct snd_soc_dai ad73311_dai = {
      .name = "AD73311",
      .playback = {
            .stream_name = "Playback",
            .channels_min = 1,
            .channels_max = 1,
            .rates = SNDRV_PCM_RATE_8000,
            .formats = SNDRV_PCM_FMTBIT_S16_LE, },
      .capture = {
            .stream_name = "Capture",
            .channels_min = 1,
            .channels_max = 1,
            .rates = SNDRV_PCM_RATE_8000,
            .formats = SNDRV_PCM_FMTBIT_S16_LE, },
};
EXPORT_SYMBOL_GPL(ad73311_dai);

static int ad73311_soc_probe(struct platform_device *pdev)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct snd_soc_codec *codec;
      int ret = 0;

      codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
      if (codec == NULL)
            return -ENOMEM;
      mutex_init(&codec->mutex);
      codec->name = "AD73311";
      codec->owner = THIS_MODULE;
      codec->dai = &ad73311_dai;
      codec->num_dai = 1;
      socdev->card->codec = codec;
      INIT_LIST_HEAD(&codec->dapm_widgets);
      INIT_LIST_HEAD(&codec->dapm_paths);

      /* register pcms */
      ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
      if (ret < 0) {
            printk(KERN_ERR "ad73311: failed to create pcms\n");
            goto pcm_err;
      }

      ret = snd_soc_init_card(socdev);
      if (ret < 0) {
            printk(KERN_ERR "ad73311: failed to register card\n");
            goto register_err;
      }

      return ret;

register_err:
      snd_soc_free_pcms(socdev);
pcm_err:
      kfree(socdev->card->codec);
      socdev->card->codec = NULL;
      return ret;
}

static int ad73311_soc_remove(struct platform_device *pdev)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct snd_soc_codec *codec = socdev->card->codec;

      if (codec == NULL)
            return 0;
      snd_soc_free_pcms(socdev);
      kfree(codec);
      return 0;
}

struct snd_soc_codec_device soc_codec_dev_ad73311 = {
      .probe =    ad73311_soc_probe,
      .remove =   ad73311_soc_remove,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_ad73311);

static int __init ad73311_init(void)
{
      return snd_soc_register_dai(&ad73311_dai);
}
module_init(ad73311_init);

static void __exit ad73311_exit(void)
{
      snd_soc_unregister_dai(&ad73311_dai);
}
module_exit(ad73311_exit);

MODULE_DESCRIPTION("ASoC ad73311 driver");
MODULE_AUTHOR("Cliff Cai ");
MODULE_LICENSE("GPL");

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