root/sound/soc/codecs/ad73311.c

DEFINITIONS

1. ad73311_soc_probe
2. ad73311_soc_remove

/*
 * 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.
 *
 *  Revision history
 *    25th Sep 2008   Initial version.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/version.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->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_register_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->codec);
        socdev->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->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);

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