LXR linux/sound/soc/codecs/wm8727.c

   1/*
   2 * wm8727.c
   3 *
   4 *  Created on: 15-Oct-2009
   5 *      Author: neil.jones@imgtec.com
   6 *
   7 * Copyright (C) 2009 Imagination Technologies Ltd.
   8 *
   9 *  This program is free software; you can redistribute  it and/or modify it
  10 *  under  the terms of  the GNU General  Public License as published by the
  11 *  Free Software Foundation;  either version 2 of the  License, or (at your
  12 *  option) any later version.
  13 */
  14
  15#include <linux/init.h>
  16#include <linux/slab.h>
  17#include <linux/module.h>
  18#include <linux/kernel.h>
  19#include <linux/device.h>
  20#include <sound/core.h>
  21#include <sound/pcm.h>
  22#include <sound/ac97_codec.h>
  23#include <sound/initval.h>
  24#include <sound/soc.h>
  25
  26static const struct snd_soc_dapm_widget wm8727_dapm_widgets[] = {
  27SND_SOC_DAPM_OUTPUT("VOUTL"),
  28SND_SOC_DAPM_OUTPUT("VOUTR"),
  29};
  30
  31static const struct snd_soc_dapm_route wm8727_dapm_routes[] = {
  32        { "VOUTL", NULL, "Playback" },
  33        { "VOUTR", NULL, "Playback" },
  34};
  35
  36/*
  37 * Note this is a simple chip with no configuration interface, sample rate is
  38 * determined automatically by examining the Master clock and Bit clock ratios
  39 */
  40#define WM8727_RATES  (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
  41                        SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 |\
  42                        SNDRV_PCM_RATE_192000)
  43
  44
  45static struct snd_soc_dai_driver wm8727_dai = {
  46        .name = "wm8727-hifi",
  47        .playback = {
  48                .stream_name = "Playback",
  49                .channels_min = 2,
  50                .channels_max = 2,
  51                .rates = WM8727_RATES,
  52                .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
  53                },
  54};
  55
  56static const struct snd_soc_codec_driver soc_codec_dev_wm8727 = {
  57        .component_driver = {
  58                .dapm_widgets           = wm8727_dapm_widgets,
  59                .num_dapm_widgets       = ARRAY_SIZE(wm8727_dapm_widgets),
  60                .dapm_routes            = wm8727_dapm_routes,
  61                .num_dapm_routes        = ARRAY_SIZE(wm8727_dapm_routes),
  62        },
  63};
  64
  65static int wm8727_probe(struct platform_device *pdev)
  66{
  67        return snd_soc_register_codec(&pdev->dev,
  68                        &soc_codec_dev_wm8727, &wm8727_dai, 1);
  69}
  70
  71static int wm8727_remove(struct platform_device *pdev)
  72{
  73        snd_soc_unregister_codec(&pdev->dev);
  74        return 0;
  75}
  76
  77static struct platform_driver wm8727_codec_driver = {
  78        .driver = {
  79                        .name = "wm8727",
  80        },
  81
  82        .probe = wm8727_probe,
  83        .remove = wm8727_remove,
  84};
  85
  86module_platform_driver(wm8727_codec_driver);
  87
  88MODULE_DESCRIPTION("ASoC wm8727 driver");
  89MODULE_AUTHOR("Neil Jones");
  90MODULE_LICENSE("GPL");
  91