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         SND_SOC_DAPM_AIF_IN("BT_SCO_RX", "Playback", 0,
  17                             SND_SOC_NOPM, 0, 0),
  18         SND_SOC_DAPM_AIF_OUT("BT_SCO_TX", "Capture", 0,
  19                              SND_SOC_NOPM, 0, 0),
  20 };
  21
  22 static const struct snd_soc_dapm_route bt_sco_routes[] = {
  23         { "BT_SCO_TX", NULL, "RX" },
  24         { "TX", NULL, "BT_SCO_RX" },
  25 };
  26
  27 static struct snd_soc_dai_driver bt_sco_dai[] = {
  28         {
  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                 .name = "bt-sco-pcm-wb",
  47                 .playback = {
  48                         .stream_name = "Playback",
  49                         .channels_min = 1,
  50                         .channels_max = 1,
  51                         .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
  52                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  53                 },
  54                 .capture = {
  55                          .stream_name = "Capture",
  56                         .channels_min = 1,
  57                         .channels_max = 1,
  58                         .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
  59                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  60                 },
  61         }
  62 };
  63
  64 static const struct snd_soc_component_driver soc_component_dev_bt_sco = {
  65         .dapm_widgets           = bt_sco_widgets,
  66         .num_dapm_widgets       = ARRAY_SIZE(bt_sco_widgets),
  67         .dapm_routes            = bt_sco_routes,
  68         .num_dapm_routes        = ARRAY_SIZE(bt_sco_routes),
  69         .idle_bias_on           = 1,
  70         .use_pmdown_time        = 1,
  71         .endianness             = 1,
  72         .non_legacy_dai_naming  = 1,
  73 };
  74
  75 static int bt_sco_probe(struct platform_device *pdev)
  76 {
  77         return devm_snd_soc_register_component(&pdev->dev,
  78                                       &soc_component_dev_bt_sco,
  79                                       bt_sco_dai, ARRAY_SIZE(bt_sco_dai));
  80 }
  81
  82 static int bt_sco_remove(struct platform_device *pdev)
  83 {
  84         return 0;
  85 }
  86
  87 static const struct platform_device_id bt_sco_driver_ids[] = {
  88         {
  89                 .name           = "dfbmcs320",
  90         },
  91         {
  92                 .name           = "bt-sco",
  93         },
  94         {},
  95 };
  96 MODULE_DEVICE_TABLE(platform, bt_sco_driver_ids);
  97
  98 #if defined(CONFIG_OF)
  99 static const struct of_device_id bt_sco_codec_of_match[] = {
 100         { .compatible = "delta,dfbmcs320", },
 101         { .compatible = "linux,bt-sco", },
 102         {},
 103 };
 104 MODULE_DEVICE_TABLE(of, bt_sco_codec_of_match);
 105 #endif
 106
 107 static struct platform_driver bt_sco_driver = {
 108         .driver = {
 109                 .name = "bt-sco",
 110                 .of_match_table = of_match_ptr(bt_sco_codec_of_match),
 111         },
 112         .probe = bt_sco_probe,
 113         .remove = bt_sco_remove,
 114         .id_table = bt_sco_driver_ids,
 115 };
 116
 117 module_platform_driver(bt_sco_driver);
 118
 119 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 120 MODULE_DESCRIPTION("ASoC generic bluetooth sco link driver");
 121 MODULE_LICENSE("GPL");