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
  26 static const struct snd_soc_dapm_widget wm8727_dapm_widgets[] = {
  27 SND_SOC_DAPM_OUTPUT("VOUTL"),
  28 SND_SOC_DAPM_OUTPUT("VOUTR"),
  29 };
  30
  31 static 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
  45 static 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
  56 static struct snd_soc_codec_driver soc_codec_dev_wm8727 = {
  57         .dapm_widgets = wm8727_dapm_widgets,
  58         .num_dapm_widgets = ARRAY_SIZE(wm8727_dapm_widgets),
  59         .dapm_routes = wm8727_dapm_routes,
  60         .num_dapm_routes = ARRAY_SIZE(wm8727_dapm_routes),
  61 };
  62
  63 static int wm8727_probe(struct platform_device *pdev)
  64 {
  65         return snd_soc_register_codec(&pdev->dev,
  66                         &soc_codec_dev_wm8727, &wm8727_dai, 1);
  67 }
  68
  69 static int wm8727_remove(struct platform_device *pdev)
  70 {
  71         snd_soc_unregister_codec(&pdev->dev);
  72         return 0;
  73 }
  74
  75 static struct platform_driver wm8727_codec_driver = {
  76         .driver = {
  77                         .name = "wm8727",
  78                         .owner = THIS_MODULE,
  79         },
  80
  81         .probe = wm8727_probe,
  82         .remove = wm8727_remove,
  83 };
  84
  85 module_platform_driver(wm8727_codec_driver);
  86
  87 MODULE_DESCRIPTION("ASoC wm8727 driver");
  88 MODULE_AUTHOR("Neil Jones");
  89 MODULE_LICENSE("GPL");