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 .non_legacy_dai_naming = 1, 73 }; 74 75 static int bt_sco_probe(struct platform_device *pdev) 76 { 77 return devm_snd_soc_register_component(&pdev->dev, 78 &soc_component_dev_bt_sco, 79 bt_sco_dai, ARRAY_SIZE(bt_sco_dai)); 80 } 81 82 static int bt_sco_remove(struct platform_device *pdev) 83 { 84 return 0; 85 } 86 87 static const struct platform_device_id bt_sco_driver_ids[] = { 88 { 89 .name = "dfbmcs320", 90 }, 91 { 92 .name = "bt-sco", 93 }, 94 {}, 95 }; 96 MODULE_DEVICE_TABLE(platform, bt_sco_driver_ids); 97 98 #if defined(CONFIG_OF) 99 static const struct of_device_id bt_sco_codec_of_match[] = { 100 { .compatible = "delta,dfbmcs320", }, 101 { .compatible = "linux,bt-sco", }, 102 {}, 103 }; 104 MODULE_DEVICE_TABLE(of, bt_sco_codec_of_match); 105 #endif 106 107 static struct platform_driver bt_sco_driver = { 108 .driver = { 109 .name = "bt-sco", 110 .of_match_table = of_match_ptr(bt_sco_codec_of_match), 111 }, 112 .probe = bt_sco_probe, 113 .remove = bt_sco_remove, 114 .id_table = bt_sco_driver_ids, 115 }; 116 117 module_platform_driver(bt_sco_driver); 118 119 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); 120 MODULE_DESCRIPTION("ASoC generic bluetooth sco link driver"); 121 MODULE_LICENSE("GPL"); 122