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 #include <linux/of.h>
  24
  25 #define ADS117X_RATES (SNDRV_PCM_RATE_8000_48000)
  26 #define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
  27
  28 static const struct snd_soc_dapm_widget ads117x_dapm_widgets[] = {
  29 SND_SOC_DAPM_INPUT("Input1"),
  30 SND_SOC_DAPM_INPUT("Input2"),
  31 SND_SOC_DAPM_INPUT("Input3"),
  32 SND_SOC_DAPM_INPUT("Input4"),
  33 SND_SOC_DAPM_INPUT("Input5"),
  34 SND_SOC_DAPM_INPUT("Input6"),
  35 SND_SOC_DAPM_INPUT("Input7"),
  36 SND_SOC_DAPM_INPUT("Input8"),
  37 };
  38
  39 static const struct snd_soc_dapm_route ads117x_dapm_routes[] = {
  40         { "Capture", NULL, "Input1" },
  41         { "Capture", NULL, "Input2" },
  42         { "Capture", NULL, "Input3" },
  43         { "Capture", NULL, "Input4" },
  44         { "Capture", NULL, "Input5" },
  45         { "Capture", NULL, "Input6" },
  46         { "Capture", NULL, "Input7" },
  47         { "Capture", NULL, "Input8" },
  48 };
  49
  50 static struct snd_soc_dai_driver ads117x_dai = {
  51 /* ADC */
  52         .name = "ads117x-hifi",
  53         .capture = {
  54                 .stream_name = "Capture",
  55                 .channels_min = 1,
  56                 .channels_max = 32,
  57                 .rates = ADS117X_RATES,
  58                 .formats = ADS117X_FORMATS,},
  59 };
  60
  61 static const struct snd_soc_codec_driver soc_codec_dev_ads117x = {
  62         .component_driver = {
  63                 .dapm_widgets           = ads117x_dapm_widgets,
  64                 .num_dapm_widgets       = ARRAY_SIZE(ads117x_dapm_widgets),
  65                 .dapm_routes            = ads117x_dapm_routes,
  66                 .num_dapm_routes        = ARRAY_SIZE(ads117x_dapm_routes),
  67         },
  68 };
  69
  70 static int ads117x_probe(struct platform_device *pdev)
  71 {
  72         return snd_soc_register_codec(&pdev->dev,
  73                         &soc_codec_dev_ads117x, &ads117x_dai, 1);
  74 }
  75
  76 static int ads117x_remove(struct platform_device *pdev)
  77 {
  78         snd_soc_unregister_codec(&pdev->dev);
  79         return 0;
  80 }
  81
  82 #if defined(CONFIG_OF)
  83 static const struct of_device_id ads117x_dt_ids[] = {
  84         { .compatible = "ti,ads1174" },
  85         { .compatible = "ti,ads1178" },
  86         { },
  87 };
  88 MODULE_DEVICE_TABLE(of, ads117x_dt_ids);
  89 #endif
  90
  91 static struct platform_driver ads117x_codec_driver = {
  92         .driver = {
  93                         .name = "ads117x-codec",
  94                         .of_match_table = of_match_ptr(ads117x_dt_ids),
  95         },
  96
  97         .probe = ads117x_probe,
  98         .remove = ads117x_remove,
  99 };
 100
 101 module_platform_driver(ads117x_codec_driver);
 102
 103 MODULE_DESCRIPTION("ASoC ads117x driver");
 104 MODULE_AUTHOR("Graeme Gregory");
 105 MODULE_LICENSE("GPL");