spdif_transciever.c

Go to the documentation of this file.

/*
 * ALSA SoC SPDIF DIT driver
 *
 *  This driver is used by controllers which can operate in DIT (SPDI/F) where
 *  no codec is needed.  This file provides stub codec that can be used
 *  in these configurations. TI DaVinci Audio controller uses this driver.
 *
 * Author:      Steve Chen,  <[email protected]>
 * Copyright:   (C) 2009 MontaVista Software, Inc., <[email protected]>
 * Copyright:   (C) 2009  Texas Instruments, India
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/initval.h>

#define DRV_NAME "spdif-dit"

#define STUB_RATES  SNDRV_PCM_RATE_8000_96000
#define STUB_FORMATS    SNDRV_PCM_FMTBIT_S16_LE


static struct snd_soc_codec_driver soc_codec_spdif_dit;

static struct snd_soc_dai_driver dit_stub_dai = {
    .name       = "dit-hifi",
    .playback   = {
        .stream_name    = "Playback",
        .channels_min   = 1,
        .channels_max   = 384,
        .rates      = STUB_RATES,
        .formats    = STUB_FORMATS,
    },
};

static int spdif_dit_probe(struct platform_device *pdev)
{
    return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dit,
            &dit_stub_dai, 1);
}

static int spdif_dit_remove(struct platform_device *pdev)
{
    snd_soc_unregister_codec(&pdev->dev);
    return 0;
}

static struct platform_driver spdif_dit_driver = {
    .probe      = spdif_dit_probe,
    .remove     = spdif_dit_remove,
    .driver     = {
        .name   = DRV_NAME,
        .owner  = THIS_MODULE,
    },
};

module_platform_driver(spdif_dit_driver);

MODULE_AUTHOR("Steve Chen <[email protected]>");
MODULE_DESCRIPTION("SPDIF dummy codec driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);