sound/soc/codecs/ads117x.c

   1 /*
   2  * ads117x.c  --  Driver for ads1174/8 ADC chips
   3  *
   4  * Copyright 2009 ShotSpotter Inc.
   5  * Author: Graeme Gregory <gg@slimlogic.co.uk>
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/slab.h>
  15 #include <linux/init.h>
  16 #include <linux/device.h>
  17 #include <linux/module.h>
  18 #include <sound/core.h>
  19 #include <sound/pcm.h>
  20 #include <sound/initval.h>
  21 #include <sound/soc.h>
  22
  23 #define ADS117X_RATES (SNDRV_PCM_RATE_8000_48000)
  24 #define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
  25
  26 static const struct snd_soc_dapm_widget ads117x_dapm_widgets[] = {
  27 SND_SOC_DAPM_INPUT("Input1"),
  28 SND_SOC_DAPM_INPUT("Input2"),
  29 SND_SOC_DAPM_INPUT("Input3"),
  30 SND_SOC_DAPM_INPUT("Input4"),
  31 SND_SOC_DAPM_INPUT("Input5"),
  32 SND_SOC_DAPM_INPUT("Input6"),
  33 SND_SOC_DAPM_INPUT("Input7"),
  34 SND_SOC_DAPM_INPUT("Input8"),
  35 };
  36
  37 static const struct snd_soc_dapm_route ads117x_dapm_routes[] = {
  38         { "Capture", NULL, "Input1" },
  39         { "Capture", NULL, "Input2" },
  40         { "Capture", NULL, "Input3" },
  41         { "Capture", NULL, "Input4" },
  42         { "Capture", NULL, "Input5" },
  43         { "Capture", NULL, "Input6" },
  44         { "Capture", NULL, "Input7" },
  45         { "Capture", NULL, "Input8" },
  46 };
  47
  48 static struct snd_soc_dai_driver ads117x_dai = {
  49 /* ADC */
  50         .name = "ads117x-hifi",
  51         .capture = {
  52                 .stream_name = "Capture",
  53                 .channels_min = 1,
  54                 .channels_max = 32,
  55                 .rates = ADS117X_RATES,
  56                 .formats = ADS117X_FORMATS,},
  57 };
  58
  59 static struct snd_soc_codec_driver soc_codec_dev_ads117x = {
  60         .dapm_widgets = ads117x_dapm_widgets,
  61         .num_dapm_widgets = ARRAY_SIZE(ads117x_dapm_widgets),
  62         .dapm_routes = ads117x_dapm_routes,
  63         .num_dapm_routes = ARRAY_SIZE(ads117x_dapm_routes),
  64 };
  65
  66 static int ads117x_probe(struct platform_device *pdev)
  67 {
  68         return snd_soc_register_codec(&pdev->dev,
  69                         &soc_codec_dev_ads117x, &ads117x_dai, 1);
  70 }
  71
  72 static int ads117x_remove(struct platform_device *pdev)
  73 {
  74         snd_soc_unregister_codec(&pdev->dev);
  75         return 0;
  76 }
  77
  78 static struct platform_driver ads117x_codec_driver = {
  79         .driver = {
  80                         .name = "ads117x-codec",
  81                         .owner = THIS_MODULE,
  82         },
  83
  84         .probe = ads117x_probe,
  85         .remove = ads117x_remove,
  86 };
  87
  88 module_platform_driver(ads117x_codec_driver);
  89
  90 MODULE_DESCRIPTION("ASoC ads117x driver");
  91 MODULE_AUTHOR("Graeme Gregory");
  92 MODULE_LICENSE("GPL");