sound/soc/codecs/bt-sco.c

   1 /*
   2  * Driver for generic Bluetooth SCO link
   3  * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
   4  *
   5  *  This program is free software; you can redistribute  it and/or modify it
   6  *  under  the terms of  the GNU General  Public License as published by the
   7  *  Free Software Foundation;  either version 2 of the  License, or (at your
   8  *  option) any later version.
   9  *
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/module.h>
  14 #include <linux/platform_device.h>
  15
  16 #include <sound/soc.h>
  17
  18 static const struct snd_soc_dapm_widget bt_sco_widgets[] = {
  19         SND_SOC_DAPM_INPUT("RX"),
  20         SND_SOC_DAPM_OUTPUT("TX"),
  21 };
  22
  23 static const struct snd_soc_dapm_route bt_sco_routes[] = {
  24         { "Capture", NULL, "RX" },
  25         { "TX", NULL, "Playback" },
  26 };
  27
  28 static struct snd_soc_dai_driver bt_sco_dai = {
  29         .name = "bt-sco-pcm",
  30         .playback = {
  31                 .stream_name = "Playback",
  32                 .channels_min = 1,
  33                 .channels_max = 1,
  34                 .rates = SNDRV_PCM_RATE_8000,
  35                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
  36         },
  37         .capture = {
  38                  .stream_name = "Capture",
  39                 .channels_min = 1,
  40                 .channels_max = 1,
  41                 .rates = SNDRV_PCM_RATE_8000,
  42                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
  43         },
  44 };
  45
  46 static struct snd_soc_codec_driver soc_codec_dev_bt_sco = {
  47         .dapm_widgets = bt_sco_widgets,
  48         .num_dapm_widgets = ARRAY_SIZE(bt_sco_widgets),
  49         .dapm_routes = bt_sco_routes,
  50         .num_dapm_routes = ARRAY_SIZE(bt_sco_routes),
  51 };
  52
  53 static int bt_sco_probe(struct platform_device *pdev)
  54 {
  55         return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_bt_sco,
  56                         &bt_sco_dai, 1);
  57 }
  58
  59 static int bt_sco_remove(struct platform_device *pdev)
  60 {
  61         snd_soc_unregister_codec(&pdev->dev);
  62
  63         return 0;
  64 }
  65
  66 static const struct platform_device_id bt_sco_driver_ids[] = {
  67         {
  68                 .name           = "dfbmcs320",
  69         },
  70         {
  71                 .name           = "bt-sco",
  72         },
  73         {},
  74 };
  75 MODULE_DEVICE_TABLE(platform, bt_sco_driver_ids);
  76
  77 #if defined(CONFIG_OF)
  78 static const struct of_device_id bt_sco_codec_of_match[] = {
  79         { .compatible = "delta,dfbmcs320", },
  80         {},
  81 };
  82 MODULE_DEVICE_TABLE(of, bt_sco_codec_of_match);
  83 #endif
  84
  85 static struct platform_driver bt_sco_driver = {
  86         .driver = {
  87                 .name = "bt-sco",
  88                 .of_match_table = of_match_ptr(bt_sco_codec_of_match),
  89         },
  90         .probe = bt_sco_probe,
  91         .remove = bt_sco_remove,
  92         .id_table = bt_sco_driver_ids,
  93 };
  94
  95 module_platform_driver(bt_sco_driver);
  96
  97 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
  98 MODULE_DESCRIPTION("ASoC generic bluetooth sco link driver");
  99 MODULE_LICENSE("GPL");