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_component_driver soc_component_dev_ads117x = {
  62         .dapm_widgets           = ads117x_dapm_widgets,
  63         .num_dapm_widgets       = ARRAY_SIZE(ads117x_dapm_widgets),
  64         .dapm_routes            = ads117x_dapm_routes,
  65         .num_dapm_routes        = ARRAY_SIZE(ads117x_dapm_routes),
  66         .idle_bias_on           = 1,
  67         .use_pmdown_time        = 1,
  68         .endianness             = 1,
  69         .non_legacy_dai_naming  = 1,
  70 };
  71
  72 static int ads117x_probe(struct platform_device *pdev)
  73 {
  74         return devm_snd_soc_register_component(&pdev->dev,
  75                         &soc_component_dev_ads117x, &ads117x_dai, 1);
  76 }
  77
  78 #if defined(CONFIG_OF)
  79 static const struct of_device_id ads117x_dt_ids[] = {
  80         { .compatible = "ti,ads1174" },
  81         { .compatible = "ti,ads1178" },
  82         { },
  83 };
  84 MODULE_DEVICE_TABLE(of, ads117x_dt_ids);
  85 #endif
  86
  87 static struct platform_driver ads117x_codec_driver = {
  88         .driver = {
  89                         .name = "ads117x-codec",
  90                         .of_match_table = of_match_ptr(ads117x_dt_ids),
  91         },
  92
  93         .probe = ads117x_probe,
  94 };
  95
  96 module_platform_driver(ads117x_codec_driver);
  97
  98 MODULE_DESCRIPTION("ASoC ads117x driver");
  99 MODULE_AUTHOR("Graeme Gregory");
 100 MODULE_LICENSE("GPL");