LXR linux/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
  30static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = {
  31SND_SOC_DAPM_INPUT("AINL"),
  32SND_SOC_DAPM_INPUT("AINR"),
  33};
  34
  35static const struct snd_soc_dapm_route wm8782_dapm_routes[] = {
  36        { "Capture", NULL, "AINL" },
  37        { "Capture", NULL, "AINR" },
  38};
  39
  40static 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 */
  55static const char *supply_names[] = {
  56        "Vdda", /* analog supply, 2.7V - 3.6V */
  57        "Vdd",  /* digital supply, 2.7V - 5.5V */
  58};
  59
  60struct wm8782_priv {
  61        struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
  62};
  63
  64static 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
  70static 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
  77static 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
  84static 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
  94static 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
 109static 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
 134static const struct of_device_id wm8782_of_match[] = {
 135        { .compatible = "wlf,wm8782", },
 136        { }
 137};
 138MODULE_DEVICE_TABLE(of, wm8782_of_match);
 139#endif
 140
 141static 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
 149module_platform_driver(wm8782_codec_driver);
 150
 151MODULE_DESCRIPTION("ASoC WM8782 driver");
 152MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>");
 153MODULE_LICENSE("GPL");
 154