Quelle  bt-sco.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Driver for generic Bluetooth SCO link
 * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>

#include <sound/soc.h>

static const struct snd_soc_dapm_widget bt_sco_widgets[] = {
 SND_SOC_DAPM_INPUT("RX"),
 SND_SOC_DAPM_OUTPUT("TX"),
 SND_SOC_DAPM_AIF_IN("BT_SCO_RX", "Playback", 0,
       SND_SOC_NOPM, 0, 0),
 SND_SOC_DAPM_AIF_OUT("BT_SCO_TX", "Capture", 0,
        SND_SOC_NOPM, 0, 0),
};

static const struct snd_soc_dapm_route bt_sco_routes[] = {
 { "BT_SCO_TX", NULL, "RX" },
 { "TX", NULL, "BT_SCO_RX" },
};

static struct snd_soc_dai_driver bt_sco_dai[] = {
 {
  .name = "bt-sco-pcm",
  .playback = {
   .stream_name = "Playback",
   .channels_min = 1,
   .channels_max = 1,
   .rates = SNDRV_PCM_RATE_8000,
   .formats = SNDRV_PCM_FMTBIT_S16_LE,
  },
  .capture = {
    .stream_name = "Capture",
   .channels_min = 1,
   .channels_max = 1,
   .rates = SNDRV_PCM_RATE_8000,
   .formats = SNDRV_PCM_FMTBIT_S16_LE,
  },
 },
 {
  .name = "bt-sco-pcm-wb",
  .playback = {
   .stream_name = "Playback",
   .channels_min = 1,
   .channels_max = 1,
   .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
   .formats = SNDRV_PCM_FMTBIT_S16_LE,
  },
  .capture = {
    .stream_name = "Capture",
   .channels_min = 1,
   .channels_max = 1,
   .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
   .formats = SNDRV_PCM_FMTBIT_S16_LE,
  },
 }
};

static const struct snd_soc_component_driver soc_component_dev_bt_sco = {
 .dapm_widgets  = bt_sco_widgets,
 .num_dapm_widgets = ARRAY_SIZE(bt_sco_widgets),
 .dapm_routes  = bt_sco_routes,
 .num_dapm_routes = ARRAY_SIZE(bt_sco_routes),
 .idle_bias_on  = 1,
 .use_pmdown_time = 1,
 .endianness  = 1,
};

static int bt_sco_probe(struct platform_device *pdev)
{
 return devm_snd_soc_register_component(&pdev->dev,
          &soc_component_dev_bt_sco,
          bt_sco_dai, ARRAY_SIZE(bt_sco_dai));
}

static const struct platform_device_id bt_sco_driver_ids[] = {
 {
  .name  = "dfbmcs320",
 },
 {
  .name  = "bt-sco",
 },
 {},
};
MODULE_DEVICE_TABLE(platform, bt_sco_driver_ids);

#if defined(CONFIG_OF)
static const struct of_device_id bt_sco_codec_of_match[] = {
 { .compatible = "delta,dfbmcs320", },
 { .compatible = "linux,bt-sco", },
 {},
};
MODULE_DEVICE_TABLE(of, bt_sco_codec_of_match);
#endif

static struct platform_driver bt_sco_driver = {
 .driver = {
  .name = "bt-sco",
  .of_match_table = of_match_ptr(bt_sco_codec_of_match),
 },
 .probe = bt_sco_probe,
 .id_table = bt_sco_driver_ids,
};

module_platform_driver(bt_sco_driver);

MODULE_AUTHOR("Lars-Peter Clausen ");
MODULE_DESCRIPTION("ASoC generic bluetooth sco link driver");
MODULE_LICENSE("GPL");