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
 13static 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
 22static const struct snd_soc_dapm_route bt_sco_routes[] = {
 23	{ "BT_SCO_TX", NULL, "RX" },
 24	{ "TX", NULL, "BT_SCO_RX" },
 25};
 26
 27static 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
 64static 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};
 73
 74static int bt_sco_probe(struct platform_device *pdev)
 75{
 76	return devm_snd_soc_register_component(&pdev->dev,
 77				      &soc_component_dev_bt_sco,
 78				      bt_sco_dai, ARRAY_SIZE(bt_sco_dai));
 79}
 80
 81static const struct platform_device_id bt_sco_driver_ids[] = {
 82	{
 83		.name		= "dfbmcs320",
 84	},
 85	{
 86		.name		= "bt-sco",
 87	},
 88	{},
 89};
 90MODULE_DEVICE_TABLE(platform, bt_sco_driver_ids);
 91
 92#if defined(CONFIG_OF)
 93static const struct of_device_id bt_sco_codec_of_match[] = {
 94	{ .compatible = "delta,dfbmcs320", },
 95	{ .compatible = "linux,bt-sco", },
 96	{},
 97};
 98MODULE_DEVICE_TABLE(of, bt_sco_codec_of_match);
 99#endif
100
101static struct platform_driver bt_sco_driver = {
102	.driver = {
103		.name = "bt-sco",
104		.of_match_table = of_match_ptr(bt_sco_codec_of_match),
105	},
106	.probe = bt_sco_probe,
107	.id_table = bt_sco_driver_ids,
108};
109
110module_platform_driver(bt_sco_driver);
111
112MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
113MODULE_DESCRIPTION("ASoC generic bluetooth sco link driver");
114MODULE_LICENSE("GPL");