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         {
  30                 .name = "bt-sco-pcm",
  31                 .playback = {
  32                         .stream_name = "Playback",
  33                         .channels_min = 1,
  34                         .channels_max = 1,
  35                         .rates = SNDRV_PCM_RATE_8000,
  36                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  37                 },
  38                 .capture = {
  39                          .stream_name = "Capture",
  40                         .channels_min = 1,
  41                         .channels_max = 1,
  42                         .rates = SNDRV_PCM_RATE_8000,
  43                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  44                 },
  45         },
  46         {
  47                 .name = "bt-sco-pcm-wb",
  48                 .playback = {
  49                         .stream_name = "Playback",
  50                         .channels_min = 1,
  51                         .channels_max = 1,
  52                         .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
  53                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  54                 },
  55                 .capture = {
  56                          .stream_name = "Capture",
  57                         .channels_min = 1,
  58                         .channels_max = 1,
  59                         .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
  60                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  61                 },
  62         }
  63 };
  64
  65 static const struct snd_soc_component_driver soc_component_dev_bt_sco = {
  66         .dapm_widgets           = bt_sco_widgets,
  67         .num_dapm_widgets       = ARRAY_SIZE(bt_sco_widgets),
  68         .dapm_routes            = bt_sco_routes,
  69         .num_dapm_routes        = ARRAY_SIZE(bt_sco_routes),
  70         .idle_bias_on           = 1,
  71         .use_pmdown_time        = 1,
  72         .endianness             = 1,
  73         .non_legacy_dai_naming  = 1,
  74 };
  75
  76 static int bt_sco_probe(struct platform_device *pdev)
  77 {
  78         return devm_snd_soc_register_component(&pdev->dev,
  79                                       &soc_component_dev_bt_sco,
  80                                       bt_sco_dai, ARRAY_SIZE(bt_sco_dai));
  81 }
  82
  83 static int bt_sco_remove(struct platform_device *pdev)
  84 {
  85         return 0;
  86 }
  87
  88 static const struct platform_device_id bt_sco_driver_ids[] = {
  89         {
  90                 .name           = "dfbmcs320",
  91         },
  92         {
  93                 .name           = "bt-sco",
  94         },
  95         {},
  96 };
  97 MODULE_DEVICE_TABLE(platform, bt_sco_driver_ids);
  98
  99 #if defined(CONFIG_OF)
 100 static const struct of_device_id bt_sco_codec_of_match[] = {
 101         { .compatible = "delta,dfbmcs320", },
 102         { .compatible = "linux,bt-sco", },
 103         {},
 104 };
 105 MODULE_DEVICE_TABLE(of, bt_sco_codec_of_match);
 106 #endif
 107
 108 static struct platform_driver bt_sco_driver = {
 109         .driver = {
 110                 .name = "bt-sco",
 111                 .of_match_table = of_match_ptr(bt_sco_codec_of_match),
 112         },
 113         .probe = bt_sco_probe,
 114         .remove = bt_sco_remove,
 115         .id_table = bt_sco_driver_ids,
 116 };
 117
 118 module_platform_driver(bt_sco_driver);
 119
 120 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 121 MODULE_DESCRIPTION("ASoC generic bluetooth sco link driver");
 122 MODULE_LICENSE("GPL");