sound/soc/codecs/wm8782.c

   1 /*
   2  * sound/soc/codecs/wm8782.c
   3  * simple, strap-pin configured 24bit 2ch ADC
   4  *
   5  * Copyright: 2011 Raumfeld GmbH
   6  * Author: Johannes Stezenbach <js@sig21.net>
   7  *
   8  * based on ad73311.c
   9  * Copyright:   Analog Device Inc.
  10  * Author:      Cliff Cai <cliff.cai@analog.com>
  11  *
  12  * This program is free software; you can redistribute  it and/or modify it
  13  * under  the terms of  the GNU General  Public License as published by the
  14  * Free Software Foundation;  either version 2 of the  License, or (at your
  15  * option) any later version.
  16  */
  17
  18 #include <linux/init.h>
  19 #include <linux/slab.h>
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/device.h>
  23 #include <linux/regulator/consumer.h>
  24 #include <sound/core.h>
  25 #include <sound/pcm.h>
  26 #include <sound/ac97_codec.h>
  27 #include <sound/initval.h>
  28 #include <sound/soc.h>
  29
  30 static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = {
  31 SND_SOC_DAPM_INPUT("AINL"),
  32 SND_SOC_DAPM_INPUT("AINR"),
  33 };
  34
  35 static const struct snd_soc_dapm_route wm8782_dapm_routes[] = {
  36         { "Capture", NULL, "AINL" },
  37         { "Capture", NULL, "AINR" },
  38 };
  39
  40 static struct snd_soc_dai_driver wm8782_dai = {
  41         .name = "wm8782",
  42         .capture = {
  43                 .stream_name = "Capture",
  44                 .channels_min = 2,
  45                 .channels_max = 2,
  46                 /* For configurations with FSAMPEN=0 */
  47                 .rates = SNDRV_PCM_RATE_8000_48000,
  48                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
  49                            SNDRV_PCM_FMTBIT_S20_3LE |
  50                            SNDRV_PCM_FMTBIT_S24_LE,
  51         },
  52 };
  53
  54 /* regulator power supply names */
  55 static const char *supply_names[] = {
  56         "Vdda", /* analog supply, 2.7V - 3.6V */
  57         "Vdd",  /* digital supply, 2.7V - 5.5V */
  58 };
  59
  60 struct wm8782_priv {
  61         struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
  62 };
  63
  64 static int wm8782_soc_probe(struct snd_soc_component *component)
  65 {
  66         struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
  67         return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
  68 }
  69
  70 static void wm8782_soc_remove(struct snd_soc_component *component)
  71 {
  72         struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
  73         regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
  74 }
  75
  76 #ifdef CONFIG_PM
  77 static int wm8782_soc_suspend(struct snd_soc_component *component)
  78 {
  79         struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
  80         regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
  81         return 0;
  82 }
  83
  84 static int wm8782_soc_resume(struct snd_soc_component *component)
  85 {
  86         struct wm8782_priv *priv = snd_soc_component_get_drvdata(component);
  87         return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
  88 }
  89 #else
  90 #define wm8782_soc_suspend      NULL
  91 #define wm8782_soc_resume       NULL
  92 #endif /* CONFIG_PM */
  93
  94 static const struct snd_soc_component_driver soc_component_dev_wm8782 = {
  95         .probe                  = wm8782_soc_probe,
  96         .remove                 = wm8782_soc_remove,
  97         .suspend                = wm8782_soc_suspend,
  98         .resume                 = wm8782_soc_resume,
  99         .dapm_widgets           = wm8782_dapm_widgets,
 100         .num_dapm_widgets       = ARRAY_SIZE(wm8782_dapm_widgets),
 101         .dapm_routes            = wm8782_dapm_routes,
 102         .num_dapm_routes        = ARRAY_SIZE(wm8782_dapm_routes),
 103         .idle_bias_on           = 1,
 104         .use_pmdown_time        = 1,
 105         .endianness             = 1,
 106         .non_legacy_dai_naming  = 1,
 107 };
 108
 109 static int wm8782_probe(struct platform_device *pdev)
 110 {
 111         struct device *dev = &pdev->dev;
 112         struct wm8782_priv *priv;
 113         int ret, i;
 114
 115         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 116         if (!priv)
 117                 return -ENOMEM;
 118
 119         dev_set_drvdata(dev, priv);
 120
 121         for (i = 0; i < ARRAY_SIZE(supply_names); i++)
 122                 priv->supplies[i].supply = supply_names[i];
 123
 124         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies),
 125                                       priv->supplies);
 126         if (ret < 0)
 127                 return ret;
 128
 129         return devm_snd_soc_register_component(&pdev->dev,
 130                         &soc_component_dev_wm8782, &wm8782_dai, 1);
 131 }
 132
 133 #ifdef CONFIG_OF
 134 static const struct of_device_id wm8782_of_match[] = {
 135         { .compatible = "wlf,wm8782", },
 136         { }
 137 };
 138 MODULE_DEVICE_TABLE(of, wm8782_of_match);
 139 #endif
 140
 141 static struct platform_driver wm8782_codec_driver = {
 142         .driver = {
 143                 .name = "wm8782",
 144                 .of_match_table = of_match_ptr(wm8782_of_match),
 145         },
 146         .probe = wm8782_probe,
 147 };
 148
 149 module_platform_driver(wm8782_codec_driver);
 150
 151 MODULE_DESCRIPTION("ASoC WM8782 driver");
 152 MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>");
 153 MODULE_LICENSE("GPL");