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 <mach/kirkwood.h>
  20 #include <plat/audio.h>
  21 #include <asm/mach-types.h>
  22 #include "../codecs/cs42l51.h"
  23
  24 static int openrd_client_hw_params(struct snd_pcm_substream *substream,
  25                 struct snd_pcm_hw_params *params)
  26 {
  27         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  28         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  29         unsigned int freq;
  30
  31         switch (params_rate(params)) {
  32         default:
  33         case 44100:
  34                 freq = 11289600;
  35                 break;
  36         case 48000:
  37                 freq = 12288000;
  38                 break;
  39         case 96000:
  40                 freq = 24576000;
  41                 break;
  42         }
  43
  44         return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);
  45
  46 }
  47
  48 static struct snd_soc_ops openrd_client_ops = {
  49         .hw_params = openrd_client_hw_params,
  50 };
  51
  52
  53 static struct snd_soc_dai_link openrd_client_dai[] = {
  54 {
  55         .name = "CS42L51",
  56         .stream_name = "CS42L51 HiFi",
  57         .cpu_dai_name = "kirkwood-i2s",
  58         .platform_name = "kirkwood-pcm-audio",
  59         .codec_dai_name = "cs42l51-hifi",
  60         .codec_name = "cs42l51-codec.0-004a",
  61         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS,
  62         .ops = &openrd_client_ops,
  63 },
  64 };
  65
  66
  67 static struct snd_soc_card openrd_client = {
  68         .name = "OpenRD Client",
  69         .owner = THIS_MODULE,
  70         .dai_link = openrd_client_dai,
  71         .num_links = ARRAY_SIZE(openrd_client_dai),
  72 };
  73
  74 static struct platform_device *openrd_client_snd_device;
  75
  76 static int __init openrd_client_init(void)
  77 {
  78         int ret;
  79
  80         if (!machine_is_openrd_client() && !machine_is_openrd_ultimate())
  81                 return 0;
  82
  83         openrd_client_snd_device = platform_device_alloc("soc-audio", -1);
  84         if (!openrd_client_snd_device)
  85                 return -ENOMEM;
  86
  87         platform_set_drvdata(openrd_client_snd_device,
  88                         &openrd_client);
  89
  90         ret = platform_device_add(openrd_client_snd_device);
  91         if (ret) {
  92                 printk(KERN_ERR "%s: platform_device_add failed\n", __func__);
  93                 platform_device_put(openrd_client_snd_device);
  94         }
  95
  96         return ret;
  97 }
  98
  99 static void __exit openrd_client_exit(void)
 100 {
 101         platform_device_unregister(openrd_client_snd_device);
 102 }
 103
 104 module_init(openrd_client_init);
 105 module_exit(openrd_client_exit);
 106
 107 /* Module information */
 108 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
 109 MODULE_DESCRIPTION("ALSA SoC OpenRD Client");
 110 MODULE_LICENSE("GPL");
 111 MODULE_ALIAS("platform:soc-audio");