LXR linux/sound/soc/codecs/spdif

   1/*
   2 * ALSA SoC SPDIF DIR (Digital Interface Reciever) driver
   3 *
   4 * Based on ALSA SoC SPDIF DIT driver
   5 *
   6 *  This driver is used by controllers which can operate in DIR (SPDI/F) where
   7 *  no codec is needed.  This file provides stub codec that can be used
   8 *  in these configurations. SPEAr SPDIF IN Audio controller uses this driver.
   9 *
  10 * Author:      Vipin Kumar,  <vipin.kumar@st.com>
  11 * Copyright:   (C) 2012  ST Microelectronics
  12 *
  13 * This program is free software; you can redistribute it and/or modify
  14 * it under the terms of the GNU General Public License version 2 as
  15 * published by the Free Software Foundation.
  16 */
  17
  18#include <linux/module.h>
  19#include <linux/moduleparam.h>
  20#include <linux/slab.h>
  21#include <sound/soc.h>
  22#include <sound/pcm.h>
  23#include <sound/initval.h>
  24
  25#define STUB_RATES      SNDRV_PCM_RATE_8000_192000
  26#define STUB_FORMATS    (SNDRV_PCM_FMTBIT_S16_LE | \
  27                        SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
  28
  29static struct snd_soc_codec_driver soc_codec_spdif_dir;
  30
  31static struct snd_soc_dai_driver dir_stub_dai = {
  32        .name           = "dir-hifi",
  33        .capture        = {
  34                .stream_name    = "Capture",
  35                .channels_min   = 1,
  36                .channels_max   = 384,
  37                .rates          = STUB_RATES,
  38                .formats        = STUB_FORMATS,
  39        },
  40};
  41
  42static int spdif_dir_probe(struct platform_device *pdev)
  43{
  44        return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dir,
  45                        &dir_stub_dai, 1);
  46}
  47
  48static int spdif_dir_remove(struct platform_device *pdev)
  49{
  50        snd_soc_unregister_codec(&pdev->dev);
  51        return 0;
  52}
  53
  54static struct platform_driver spdif_dir_driver = {
  55        .probe          = spdif_dir_probe,
  56        .remove         = spdif_dir_remove,
  57        .driver         = {
  58                .name   = "spdif-dir",
  59                .owner  = THIS_MODULE,
  60        },
  61};
  62
  63module_platform_driver(spdif_dir_driver);
  64
  65MODULE_DESCRIPTION("ASoC SPDIF DIR driver");
  66MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
  67MODULE_LICENSE("GPL");
  68