kernel/sound/soc/codecs/gtm601.c

   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         .dapm_widgets = gtm601_dapm_widgets,
  56         .num_dapm_widgets = ARRAY_SIZE(gtm601_dapm_widgets),
  57         .dapm_routes = gtm601_dapm_routes,
  58         .num_dapm_routes = ARRAY_SIZE(gtm601_dapm_routes),
  59 };
  60
  61 static int gtm601_platform_probe(struct platform_device *pdev)
  62 {
  63         return snd_soc_register_codec(&pdev->dev,
  64                         &soc_codec_dev_gtm601, &gtm601_dai, 1);
  65 }
  66
  67 static int gtm601_platform_remove(struct platform_device *pdev)
  68 {
  69         snd_soc_unregister_codec(&pdev->dev);
  70         return 0;
  71 }
  72
  73 #if defined(CONFIG_OF)
  74 static const struct of_device_id gtm601_codec_of_match[] = {
  75         { .compatible = "option,gtm601", },
  76         {},
  77 };
  78 MODULE_DEVICE_TABLE(of, gtm601_codec_of_match);
  79 #endif
  80
  81 static struct platform_driver gtm601_codec_driver = {
  82         .driver = {
  83                 .name = "gtm601",
  84                 .of_match_table = of_match_ptr(gtm601_codec_of_match),
  85         },
  86         .probe = gtm601_platform_probe,
  87         .remove = gtm601_platform_remove,
  88 };
  89
  90 module_platform_driver(gtm601_codec_driver);
  91
  92 MODULE_DESCRIPTION("ASoC gtm601 driver");
  93 MODULE_AUTHOR("Marek Belisko <marek@goldelico.com>");
  94 MODULE_LICENSE("GPL");
  95 MODULE_ALIAS("platform:gtm601");