sound/soc/codecs/bt-sco.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Driver for generic Bluetooth SCO link
   4  * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
   5  */
   6
   7 #include <linux/init.h>
   8 #include <linux/module.h>
   9 #include <linux/platform_device.h>
  10
  11 #include <sound/soc.h>
  12
  13 static const struct snd_soc_dapm_widget bt_sco_widgets[] = {
  14         SND_SOC_DAPM_INPUT("RX"),
  15         SND_SOC_DAPM_OUTPUT("TX"),
  16 };
  17
  18 static const struct snd_soc_dapm_route bt_sco_routes[] = {
  19         { "Capture", NULL, "RX" },
  20         { "TX", NULL, "Playback" },
  21 };
  22
  23 static struct snd_soc_dai_driver bt_sco_dai[] = {
  24         {
  25                 .name = "bt-sco-pcm",
  26                 .playback = {
  27                         .stream_name = "Playback",
  28                         .channels_min = 1,
  29                         .channels_max = 1,
  30                         .rates = SNDRV_PCM_RATE_8000,
  31                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  32                 },
  33                 .capture = {
  34                          .stream_name = "Capture",
  35                         .channels_min = 1,
  36                         .channels_max = 1,
  37                         .rates = SNDRV_PCM_RATE_8000,
  38                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  39                 },
  40         },
  41         {
  42                 .name = "bt-sco-pcm-wb",
  43                 .playback = {
  44                         .stream_name = "Playback",
  45                         .channels_min = 1,
  46                         .channels_max = 1,
  47                         .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
  48                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  49                 },
  50                 .capture = {
  51                          .stream_name = "Capture",
  52                         .channels_min = 1,
  53                         .channels_max = 1,
  54                         .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
  55                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  56                 },
  57         }
  58 };
  59
  60 static const struct snd_soc_component_driver soc_component_dev_bt_sco = {
  61         .dapm_widgets           = bt_sco_widgets,
  62         .num_dapm_widgets       = ARRAY_SIZE(bt_sco_widgets),
  63         .dapm_routes            = bt_sco_routes,
  64         .num_dapm_routes        = ARRAY_SIZE(bt_sco_routes),
  65         .idle_bias_on           = 1,
  66         .use_pmdown_time        = 1,
  67         .endianness             = 1,
  68         .non_legacy_dai_naming  = 1,
  69 };
  70
  71 static int bt_sco_probe(struct platform_device *pdev)
  72 {
  73         return devm_snd_soc_register_component(&pdev->dev,
  74                                       &soc_component_dev_bt_sco,
  75                                       bt_sco_dai, ARRAY_SIZE(bt_sco_dai));
  76 }
  77
  78 static int bt_sco_remove(struct platform_device *pdev)
  79 {
  80         return 0;
  81 }
  82
  83 static const struct platform_device_id bt_sco_driver_ids[] = {
  84         {
  85                 .name           = "dfbmcs320",
  86         },
  87         {
  88                 .name           = "bt-sco",
  89         },
  90         {},
  91 };
  92 MODULE_DEVICE_TABLE(platform, bt_sco_driver_ids);
  93
  94 #if defined(CONFIG_OF)
  95 static const struct of_device_id bt_sco_codec_of_match[] = {
  96         { .compatible = "delta,dfbmcs320", },
  97         { .compatible = "linux,bt-sco", },
  98         {},
  99 };
 100 MODULE_DEVICE_TABLE(of, bt_sco_codec_of_match);
 101 #endif
 102
 103 static struct platform_driver bt_sco_driver = {
 104         .driver = {
 105                 .name = "bt-sco",
 106                 .of_match_table = of_match_ptr(bt_sco_codec_of_match),
 107         },
 108         .probe = bt_sco_probe,
 109         .remove = bt_sco_remove,
 110         .id_table = bt_sco_driver_ids,
 111 };
 112
 113 module_platform_driver(bt_sco_driver);
 114
 115 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 116 MODULE_DESCRIPTION("ASoC generic bluetooth sco link driver");
 117 MODULE_LICENSE("GPL");