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 SND_SOC_DAPM_AIF_IN("BT_SCO_RX_WB", "WB Playback", 0,
21 SND_SOC_NOPM, 0, 0),
22 SND_SOC_DAPM_AIF_OUT("BT_SCO_TX_WB", "WB Capture", 0,
23 SND_SOC_NOPM, 0, 0),
24 };
25
26 static const struct snd_soc_dapm_route bt_sco_routes[] = {
27 { "BT_SCO_TX", NULL, "RX" },
28 { "TX", NULL, "BT_SCO_RX" },
29 { "BT_SCO_TX_WB", NULL, "RX" },
30 { "TX", NULL, "BT_SCO_RX_WB" },
31 };
32
33 static struct snd_soc_dai_driver bt_sco_dai[] = {
34 {
35 .name = "bt-sco-pcm",
36 .playback = {
37 .stream_name = "Playback",
38 .channels_min = 1,
39 .channels_max = 1,
40 .rates = SNDRV_PCM_RATE_8000,
41 .formats = SNDRV_PCM_FMTBIT_S16_LE,
42 },
43 .capture = {
44 .stream_name = "Capture",
45 .channels_min = 1,
46 .channels_max = 1,
47 .rates = SNDRV_PCM_RATE_8000,
48 .formats = SNDRV_PCM_FMTBIT_S16_LE,
49 },
50 },
51 {
52 .name = "bt-sco-pcm-wb",
53 .playback = {
54 .stream_name = "WB Playback",
55 .channels_min = 1,
56 .channels_max = 1,
57 .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
58 .formats = SNDRV_PCM_FMTBIT_S16_LE,
59 },
60 .capture = {
61 .stream_name = "WB Capture",
62 .channels_min = 1,
63 .channels_max = 1,
64 .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000,
65 .formats = SNDRV_PCM_FMTBIT_S16_LE,
66 },
67 }
68 };
69
70 static const struct snd_soc_component_driver soc_component_dev_bt_sco = {
71 .dapm_widgets = bt_sco_widgets,
72 .num_dapm_widgets = ARRAY_SIZE(bt_sco_widgets),
73 .dapm_routes = bt_sco_routes,
74 .num_dapm_routes = ARRAY_SIZE(bt_sco_routes),
75 .idle_bias_on = 1,
76 .use_pmdown_time = 1,
77 .endianness = 1,
78 };
79
bt_sco_probe(struct platform_device * pdev)80 static int bt_sco_probe(struct platform_device *pdev)
81 {
82 return devm_snd_soc_register_component(&pdev->dev,
83 &soc_component_dev_bt_sco,
84 bt_sco_dai, ARRAY_SIZE(bt_sco_dai));
85 }
86
87 static const struct platform_device_id bt_sco_driver_ids[] = {
88 { .name = "dfbmcs320" },
89 { .name = "bt-sco" },
90 { }
91 };
92 MODULE_DEVICE_TABLE(platform, bt_sco_driver_ids);
93
94 #if defined(CONFIG_OF)
95 static const struct of_device_id bt_sco_codec_of_match[] = {
96 { .compatible = "delta,dfbmcs320", },
97 { .compatible = "linux,bt-sco", },
98 {},
99 };
100 MODULE_DEVICE_TABLE(of, bt_sco_codec_of_match);
101 #endif
102
103 static struct platform_driver bt_sco_driver = {
104 .driver = {
105 .name = "bt-sco",
106 .of_match_table = of_match_ptr(bt_sco_codec_of_match),
107 },
108 .probe = bt_sco_probe,
109 .id_table = bt_sco_driver_ids,
110 };
111
112 module_platform_driver(bt_sco_driver);
113
114 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
115 MODULE_DESCRIPTION("ASoC generic bluetooth sco link driver");
116 MODULE_LICENSE("GPL");
117