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 };
73
bt_sco_probe(struct platform_device * pdev)74 static 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
bt_sco_remove(struct platform_device * pdev)81 static int bt_sco_remove(struct platform_device *pdev)
82 {
83 return 0;
84 }
85
86 static const struct platform_device_id bt_sco_driver_ids[] = {
87 {
88 .name = "dfbmcs320",
89 },
90 {
91 .name = "bt-sco",
92 },
93 {},
94 };
95 MODULE_DEVICE_TABLE(platform, bt_sco_driver_ids);
96
97 #if defined(CONFIG_OF)
98 static const struct of_device_id bt_sco_codec_of_match[] = {
99 { .compatible = "delta,dfbmcs320", },
100 { .compatible = "linux,bt-sco", },
101 {},
102 };
103 MODULE_DEVICE_TABLE(of, bt_sco_codec_of_match);
104 #endif
105
106 static struct platform_driver bt_sco_driver = {
107 .driver = {
108 .name = "bt-sco",
109 .of_match_table = of_match_ptr(bt_sco_codec_of_match),
110 },
111 .probe = bt_sco_probe,
112 .remove = bt_sco_remove,
113 .id_table = bt_sco_driver_ids,
114 };
115
116 module_platform_driver(bt_sco_driver);
117
118 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
119 MODULE_DESCRIPTION("ASoC generic bluetooth sco link driver");
120 MODULE_LICENSE("GPL");
121