1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * This is a simple driver for the GTM601 Voice PCM interface 4 * 5 * Copyright (C) 2015 Goldelico GmbH 6 * 7 * Author: Marek Belisko <marek@goldelico.com> 8 * 9 * Based on wm8727.c driver 10 */ 11 12 #include <linux/init.h> 13 #include <linux/slab.h> 14 #include <linux/module.h> 15 #include <linux/kernel.h> 16 #include <linux/of.h> 17 #include <sound/core.h> 18 #include <sound/pcm.h> 19 #include <sound/initval.h> 20 #include <sound/soc.h> 21 22 static const struct snd_soc_dapm_widget gtm601_dapm_widgets[] = { 23 SND_SOC_DAPM_OUTPUT("AOUT"), 24 SND_SOC_DAPM_INPUT("AIN"), 25 }; 26 27 static const struct snd_soc_dapm_route gtm601_dapm_routes[] = { 28 { "AOUT", NULL, "Playback" }, 29 { "Capture", NULL, "AIN" }, 30 }; 31 32 static struct snd_soc_dai_driver gtm601_dai = { 33 .name = "gtm601", 34 .playback = { 35 .stream_name = "Playback", 36 .channels_min = 1, 37 .channels_max = 1, 38 .rates = SNDRV_PCM_RATE_8000, 39 .formats = SNDRV_PCM_FMTBIT_S16_LE, 40 }, 41 .capture = { 42 .stream_name = "Capture", 43 .channels_min = 1, 44 .channels_max = 1, 45 .rates = SNDRV_PCM_RATE_8000, 46 .formats = SNDRV_PCM_FMTBIT_S16_LE, 47 }, 48 }; 49 50 static struct snd_soc_dai_driver bm818_dai = { 51 .name = "bm818", 52 .playback = { 53 .stream_name = "Playback", 54 .channels_min = 2, 55 .channels_max = 2, 56 .rates = SNDRV_PCM_RATE_48000, 57 .formats = SNDRV_PCM_FMTBIT_S16_LE, 58 }, 59 .capture = { 60 .stream_name = "Capture", 61 .channels_min = 2, 62 .channels_max = 2, 63 .rates = SNDRV_PCM_RATE_48000, 64 .formats = SNDRV_PCM_FMTBIT_S16_LE, 65 }, 66 }; 67 68 static const struct snd_soc_component_driver soc_component_dev_gtm601 = { 69 .dapm_widgets = gtm601_dapm_widgets, 70 .num_dapm_widgets = ARRAY_SIZE(gtm601_dapm_widgets), 71 .dapm_routes = gtm601_dapm_routes, 72 .num_dapm_routes = ARRAY_SIZE(gtm601_dapm_routes), 73 .idle_bias_on = 1, 74 .use_pmdown_time = 1, 75 .endianness = 1, 76 }; 77 78 static int gtm601_platform_probe(struct platform_device *pdev) 79 { 80 const struct snd_soc_dai_driver *dai_driver; 81 82 dai_driver = of_device_get_match_data(&pdev->dev); 83 84 return devm_snd_soc_register_component(&pdev->dev, 85 &soc_component_dev_gtm601, 86 (struct snd_soc_dai_driver *)dai_driver, 1); 87 } 88 89 static const struct of_device_id gtm601_codec_of_match[] __maybe_unused = { 90 { .compatible = "option,gtm601", .data = (void *)>m601_dai }, 91 { .compatible = "broadmobi,bm818", .data = (void *)&bm818_dai }, 92 {}, 93 }; 94 MODULE_DEVICE_TABLE(of, gtm601_codec_of_match); 95 96 static struct platform_driver gtm601_codec_driver = { 97 .driver = { 98 .name = "gtm601", 99 .of_match_table = of_match_ptr(gtm601_codec_of_match), 100 }, 101 .probe = gtm601_platform_probe, 102 }; 103 104 module_platform_driver(gtm601_codec_driver); 105 106 MODULE_DESCRIPTION("ASoC gtm601 driver"); 107 MODULE_AUTHOR("Marek Belisko <marek@goldelico.com>"); 108 MODULE_LICENSE("GPL"); 109 MODULE_ALIAS("platform:gtm601"); 110