sound/soc/kirkwood/kirkwood-openrd.c

   1 /*
   2  * kirkwood-openrd.c
   3  *
   4  * (c) 2010 Arnaud Patard <apatard@mandriva.com>
   5  * (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/slab.h>
  18 #include <sound/soc.h>
  19 #include <linux/platform_data/asoc-kirkwood.h>
  20 #include "../codecs/cs42l51.h"
  21
  22 static int openrd_client_hw_params(struct snd_pcm_substream *substream,
  23                 struct snd_pcm_hw_params *params)
  24 {
  25         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  26         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  27         unsigned int freq;
  28
  29         switch (params_rate(params)) {
  30         default:
  31         case 44100:
  32                 freq = 11289600;
  33                 break;
  34         case 48000:
  35                 freq = 12288000;
  36                 break;
  37         case 96000:
  38                 freq = 24576000;
  39                 break;
  40         }
  41
  42         return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);
  43
  44 }
  45
  46 static struct snd_soc_ops openrd_client_ops = {
  47         .hw_params = openrd_client_hw_params,
  48 };
  49
  50
  51 static struct snd_soc_dai_link openrd_client_dai[] = {
  52 {
  53         .name = "CS42L51",
  54         .stream_name = "CS42L51 HiFi",
  55         .cpu_dai_name = "i2s",
  56         .platform_name = "mvebu-audio",
  57         .codec_dai_name = "cs42l51-hifi",
  58         .codec_name = "cs42l51-codec.0-004a",
  59         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS,
  60         .ops = &openrd_client_ops,
  61 },
  62 };
  63
  64
  65 static struct snd_soc_card openrd_client = {
  66         .name = "OpenRD Client",
  67         .owner = THIS_MODULE,
  68         .dai_link = openrd_client_dai,
  69         .num_links = ARRAY_SIZE(openrd_client_dai),
  70 };
  71
  72 static int openrd_probe(struct platform_device *pdev)
  73 {
  74         struct snd_soc_card *card = &openrd_client;
  75         int ret;
  76
  77         card->dev = &pdev->dev;
  78
  79         ret = snd_soc_register_card(card);
  80         if (ret)
  81                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
  82                         ret);
  83         return ret;
  84 }
  85
  86 static int openrd_remove(struct platform_device *pdev)
  87 {
  88         struct snd_soc_card *card = platform_get_drvdata(pdev);
  89
  90         snd_soc_unregister_card(card);
  91         return 0;
  92 }
  93
  94 static struct platform_driver openrd_driver = {
  95         .driver         = {
  96                 .name   = "openrd-client-audio",
  97                 .owner  = THIS_MODULE,
  98         },
  99         .probe          = openrd_probe,
 100         .remove         = openrd_remove,
 101 };
 102
 103 module_platform_driver(openrd_driver);
 104
 105 /* Module information */
 106 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
 107 MODULE_DESCRIPTION("ALSA SoC OpenRD Client");
 108 MODULE_LICENSE("GPL");
 109 MODULE_ALIAS("platform:openrd-client-audio");