soc/codecs/bt-sco.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * Driver for generic Bluetooth SCO link
0004  * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
0005  */
0006
0007 #include <linux/init.h>
0008 #include <linux/module.h>
0009 #include <linux/platform_device.h>
0010
0011 #include <sound/soc.h>
0012
0013 static const struct snd_soc_dapm_widget bt_sco_widgets[] = {
0014     SND_SOC_DAPM_INPUT("RX"),
0015     SND_SOC_DAPM_OUTPUT("TX"),
0016     SND_SOC_DAPM_AIF_IN("BT_SCO_RX", "Playback", 0,
0017                 SND_SOC_NOPM, 0, 0),
0018     SND_SOC_DAPM_AIF_OUT("BT_SCO_TX", "Capture", 0,
0019                  SND_SOC_NOPM, 0, 0),
0020 };
0021
0022 static const struct snd_soc_dapm_route bt_sco_routes[] = {
0023     { "BT_SCO_TX", NULL, "RX" },
0024     { "TX", NULL, "BT_SCO_RX" },
0025 };
0026
0027 static struct snd_soc_dai_driver bt_sco_dai[] = {
0028     {
0029         .name = "bt-sco-pcm",
0030         .playback = {
0031             .stream_name = "Playback",
0032             .channels_min = 1,
0033             .channels_max = 1,
0034             .rates = SNDRV_PCM_RATE_8000,
0035             .formats = SNDRV_PCM_FMTBIT_S16_LE,
0036         },
0037         .capture = {
0038              .stream_name = "Capture",
0039             .channels_min = 1,
0040             .channels_max = 1,
0041             .rates = SNDRV_PCM_RATE_8000,
0042             .formats = SNDRV_PCM_FMTBIT_S16_LE,
0043         },
0044     },
0045     {
0046         .name = "bt-sco-pcm-wb",
0047         .playback = {
0048             .stream_name = "Playback",
0049             .channels_min = 1,
0050             .channels_max = 1,
0051             .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
0052             .formats = SNDRV_PCM_FMTBIT_S16_LE,
0053         },
0054         .capture = {
0055              .stream_name = "Capture",
0056             .channels_min = 1,
0057             .channels_max = 1,
0058             .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
0059             .formats = SNDRV_PCM_FMTBIT_S16_LE,
0060         },
0061     }
0062 };
0063
0064 static const struct snd_soc_component_driver soc_component_dev_bt_sco = {
0065     .dapm_widgets       = bt_sco_widgets,
0066     .num_dapm_widgets   = ARRAY_SIZE(bt_sco_widgets),
0067     .dapm_routes        = bt_sco_routes,
0068     .num_dapm_routes    = ARRAY_SIZE(bt_sco_routes),
0069     .idle_bias_on       = 1,
0070     .use_pmdown_time    = 1,
0071     .endianness     = 1,
0072 };
0073
0074 static int bt_sco_probe(struct platform_device *pdev)
0075 {
0076     return devm_snd_soc_register_component(&pdev->dev,
0077                       &soc_component_dev_bt_sco,
0078                       bt_sco_dai, ARRAY_SIZE(bt_sco_dai));
0079 }
0080
0081 static int bt_sco_remove(struct platform_device *pdev)
0082 {
0083     return 0;
0084 }
0085
0086 static const struct platform_device_id bt_sco_driver_ids[] = {
0087     {
0088         .name       = "dfbmcs320",
0089     },
0090     {
0091         .name       = "bt-sco",
0092     },
0093     {},
0094 };
0095 MODULE_DEVICE_TABLE(platform, bt_sco_driver_ids);
0096
0097 #if defined(CONFIG_OF)
0098 static const struct of_device_id bt_sco_codec_of_match[] = {
0099     { .compatible = "delta,dfbmcs320", },
0100     { .compatible = "linux,bt-sco", },
0101     {},
0102 };
0103 MODULE_DEVICE_TABLE(of, bt_sco_codec_of_match);
0104 #endif
0105
0106 static struct platform_driver bt_sco_driver = {
0107     .driver = {
0108         .name = "bt-sco",
0109         .of_match_table = of_match_ptr(bt_sco_codec_of_match),
0110     },
0111     .probe = bt_sco_probe,
0112     .remove = bt_sco_remove,
0113     .id_table = bt_sco_driver_ids,
0114 };
0115
0116 module_platform_driver(bt_sco_driver);
0117
0118 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
0119 MODULE_DESCRIPTION("ASoC generic bluetooth sco link driver");
0120 MODULE_LICENSE("GPL");