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(dev: &pdev->dev,
77 component_driver: &soc_component_dev_bt_sco,
78 dai_drv: 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");
115

source code of linux/sound/soc/codecs/bt-sco.c