codecs/gtm601.c

   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_device.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 *)&gtm601_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");