sound/soc/codecs/spdif_transciever.c

   1 /*
   2  * ALSA SoC SPDIF DIT driver
   3  *
   4  *  This driver is used by controllers which can operate in DIT (SPDI/F) where
   5  *  no codec is needed.  This file provides stub codec that can be used
   6  *  in these configurations. TI DaVinci Audio controller uses this driver.
   7  *
   8  * Author:      Steve Chen,  <schen@mvista.com>
   9  * Copyright:   (C) 2009 MontaVista Software, Inc., <source@mvista.com>
  10  * Copyright:   (C) 2009  Texas Instruments, India
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/moduleparam.h>
  19 #include <sound/soc.h>
  20 #include <sound/pcm.h>
  21
  22 #include "spdif_transciever.h"
  23
  24 #define STUB_RATES      SNDRV_PCM_RATE_8000_96000
  25 #define STUB_FORMATS    SNDRV_PCM_FMTBIT_S16_LE
  26
  27 struct snd_soc_dai dit_stub_dai = {
  28         .name           = "DIT",
  29         .playback       = {
  30                 .stream_name    = "Playback",
  31                 .channels_min   = 1,
  32                 .channels_max   = 384,
  33                 .rates          = STUB_RATES,
  34                 .formats        = STUB_FORMATS,
  35         },
  36 };
  37
  38 static int spdif_dit_probe(struct platform_device *pdev)
  39 {
  40         dit_stub_dai.dev = &pdev->dev;
  41         return snd_soc_register_dai(&dit_stub_dai);
  42 }
  43
  44 static int spdif_dit_remove(struct platform_device *pdev)
  45 {
  46         snd_soc_unregister_dai(&dit_stub_dai);
  47         return 0;
  48 }
  49
  50 static struct platform_driver spdif_dit_driver = {
  51         .probe          = spdif_dit_probe,
  52         .remove         = spdif_dit_remove,
  53         .driver         = {
  54                 .name   = "spdif-dit",
  55                 .owner  = THIS_MODULE,
  56         },
  57 };
  58
  59 static int __init dit_modinit(void)
  60 {
  61         return platform_driver_register(&spdif_dit_driver);
  62 }
  63
  64 static void __exit dit_exit(void)
  65 {
  66         platform_driver_unregister(&spdif_dit_driver);
  67 }
  68
  69 module_init(dit_modinit);
  70 module_exit(dit_exit);
  71