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 /*
  27  * Note this is a simple chip with no configuration interface, sample rate is
  28  * determined automatically by examining the Master clock and Bit clock ratios
  29  */
  30 #define WM8727_RATES  (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
  31                         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 |\
  32                         SNDRV_PCM_RATE_192000)
  33
  34
  35 static struct snd_soc_dai_driver wm8727_dai = {
  36         .name = "wm8727-hifi",
  37         .playback = {
  38                 .stream_name = "Playback",
  39                 .channels_min = 2,
  40                 .channels_max = 2,
  41                 .rates = WM8727_RATES,
  42                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
  43                 },
  44 };
  45
  46 static struct snd_soc_codec_driver soc_codec_dev_wm8727;
  47
  48 static __devinit int wm8727_probe(struct platform_device *pdev)
  49 {
  50         return snd_soc_register_codec(&pdev->dev,
  51                         &soc_codec_dev_wm8727, &wm8727_dai, 1);
  52 }
  53
  54 static int __devexit wm8727_remove(struct platform_device *pdev)
  55 {
  56         snd_soc_unregister_codec(&pdev->dev);
  57         return 0;
  58 }
  59
  60 static struct platform_driver wm8727_codec_driver = {
  61         .driver = {
  62                         .name = "wm8727-codec",
  63                         .owner = THIS_MODULE,
  64         },
  65
  66         .probe = wm8727_probe,
  67         .remove = __devexit_p(wm8727_remove),
  68 };
  69
  70 static int __init wm8727_init(void)
  71 {
  72         return platform_driver_register(&wm8727_codec_driver);
  73 }
  74 module_init(wm8727_init);
  75
  76 static void __exit wm8727_exit(void)
  77 {
  78         platform_driver_unregister(&wm8727_codec_driver);
  79 }
  80 module_exit(wm8727_exit);
  81
  82 MODULE_DESCRIPTION("ASoC wm8727 driver");
  83 MODULE_AUTHOR("Neil Jones");
  84 MODULE_LICENSE("GPL");