1 /* 2 * This is a simple driver for the GTM601 Voice PCM interface 3 * 4 * Copyright (C) 2015 Goldelico GmbH 5 * 6 * Author: Marek Belisko <marek@goldelico.com> 7 * 8 * Based on wm8727.c driver 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 15 #include <linux/init.h> 16 #include <linux/slab.h> 17 #include <linux/module.h> 18 #include <linux/kernel.h> 19 #include <linux/device.h> 20 #include <sound/core.h> 21 #include <sound/pcm.h> 22 #include <sound/ac97_codec.h> 23 #include <sound/initval.h> 24 #include <sound/soc.h> 25 26 static const struct snd_soc_dapm_widget gtm601_dapm_widgets[] = { 27 SND_SOC_DAPM_OUTPUT("AOUT"), 28 SND_SOC_DAPM_INPUT("AIN"), 29 }; 30 31 static const struct snd_soc_dapm_route gtm601_dapm_routes[] = { 32 { "AOUT", NULL, "Playback" }, 33 { "Capture", NULL, "AIN" }, 34 }; 35 36 static struct snd_soc_dai_driver gtm601_dai = { 37 .name = "gtm601", 38 .playback = { 39 .stream_name = "Playback", 40 .channels_min = 1, 41 .channels_max = 1, 42 .rates = SNDRV_PCM_RATE_8000, 43 .formats = SNDRV_PCM_FMTBIT_S16_LE, 44 }, 45 .capture = { 46 .stream_name = "Capture", 47 .channels_min = 1, 48 .channels_max = 1, 49 .rates = SNDRV_PCM_RATE_8000, 50 .formats = SNDRV_PCM_FMTBIT_S16_LE, 51 }, 52 }; 53 54 static const struct snd_soc_codec_driver soc_codec_dev_gtm601 = { 55 .component_driver = { 56 .dapm_widgets = gtm601_dapm_widgets, 57 .num_dapm_widgets = ARRAY_SIZE(gtm601_dapm_widgets), 58 .dapm_routes = gtm601_dapm_routes, 59 .num_dapm_routes = ARRAY_SIZE(gtm601_dapm_routes), 60 }, 61 }; 62 63 static int gtm601_platform_probe(struct platform_device *pdev) 64 { 65 return snd_soc_register_codec(&pdev->dev, 66 &soc_codec_dev_gtm601, >m601_dai, 1); 67 } 68 69 static int gtm601_platform_remove(struct platform_device *pdev) 70 { 71 snd_soc_unregister_codec(&pdev->dev); 72 return 0; 73 } 74 75 #if defined(CONFIG_OF) 76 static const struct of_device_id gtm601_codec_of_match[] = { 77 { .compatible = "option,gtm601", }, 78 {}, 79 }; 80 MODULE_DEVICE_TABLE(of, gtm601_codec_of_match); 81 #endif 82 83 static struct platform_driver gtm601_codec_driver = { 84 .driver = { 85 .name = "gtm601", 86 .of_match_table = of_match_ptr(gtm601_codec_of_match), 87 }, 88 .probe = gtm601_platform_probe, 89 .remove = gtm601_platform_remove, 90 }; 91 92 module_platform_driver(gtm601_codec_driver); 93 94 MODULE_DESCRIPTION("ASoC gtm601 driver"); 95 MODULE_AUTHOR("Marek Belisko <marek@goldelico.com>"); 96 MODULE_LICENSE("GPL"); 97 MODULE_ALIAS("platform:gtm601"); 98