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 MODULE_LICENSE("GPL");
  25
  26 #define STUB_RATES      SNDRV_PCM_RATE_8000_96000
  27 #define STUB_FORMATS    SNDRV_PCM_FMTBIT_S16_LE
  28
  29 struct snd_soc_dai dit_stub_dai = {
  30         .name           = "DIT",
  31         .playback       = {
  32                 .stream_name    = "Playback",
  33                 .channels_min   = 1,
  34                 .channels_max   = 384,
  35                 .rates          = STUB_RATES,
  36                 .formats        = STUB_FORMATS,
  37         },
  38 };
  39 EXPORT_SYMBOL_GPL(dit_stub_dai);
  40
  41 static int spdif_dit_probe(struct platform_device *pdev)
  42 {
  43         dit_stub_dai.dev = &pdev->dev;
  44         return snd_soc_register_dai(&dit_stub_dai);
  45 }
  46
  47 static int spdif_dit_remove(struct platform_device *pdev)
  48 {
  49         snd_soc_unregister_dai(&dit_stub_dai);
  50         return 0;
  51 }
  52
  53 static struct platform_driver spdif_dit_driver = {
  54         .probe          = spdif_dit_probe,
  55         .remove         = spdif_dit_remove,
  56         .driver         = {
  57                 .name   = "spdif-dit",
  58                 .owner  = THIS_MODULE,
  59         },
  60 };
  61
  62 static int __init dit_modinit(void)
  63 {
  64         return platform_driver_register(&spdif_dit_driver);
  65 }
  66
  67 static void __exit dit_exit(void)
  68 {
  69         platform_driver_unregister(&spdif_dit_driver);
  70 }
  71
  72 module_init(dit_modinit);
  73 module_exit(dit_exit);
  74