sound/soc/codecs/spdif_receiver.c

   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
  29 static struct snd_soc_codec_driver soc_codec_spdif_dir;
  30
  31 static 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
  42 static 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
  48 static int spdif_dir_remove(struct platform_device *pdev)
  49 {
  50         snd_soc_unregister_codec(&pdev->dev);
  51         return 0;
  52 }
  53
  54 static 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
  63 module_platform_driver(spdif_dir_driver);
  64
  65 MODULE_DESCRIPTION("ASoC SPDIF DIR driver");
  66 MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
  67 MODULE_LICENSE("GPL");