sound/soc/kirkwood/kirkwood-openrd.c

   1 /*
   2  * kirkwood-openrd.c
   3  *
   4  * (c) 2010 Arnaud Patard <apatard@mandriva.com>
   5  *
   6  *  This program is free software; you can redistribute  it and/or modify it
   7  *  under  the terms of  the GNU General  Public License as published by the
   8  *  Free Software Foundation;  either version 2 of the  License, or (at your
   9  *  option) any later version.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/slab.h>
  17 #include <sound/soc.h>
  18 #include <mach/kirkwood.h>
  19 #include <plat/audio.h>
  20 #include <asm/mach-types.h>
  21 #include "../codecs/cs42l51.h"
  22
  23 static int openrd_client_hw_params(struct snd_pcm_substream *substream,
  24                 struct snd_pcm_hw_params *params)
  25 {
  26         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  27         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  28         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  29         int ret;
  30         unsigned int freq, fmt;
  31
  32         fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS;
  33         ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
  34         if (ret < 0)
  35                 return ret;
  36
  37         ret = snd_soc_dai_set_fmt(codec_dai, fmt);
  38         if (ret < 0)
  39                 return ret;
  40
  41         switch (params_rate(params)) {
  42         default:
  43         case 44100:
  44                 freq = 11289600;
  45                 break;
  46         case 48000:
  47                 freq = 12288000;
  48                 break;
  49         case 96000:
  50                 freq = 24576000;
  51                 break;
  52         }
  53
  54         return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);
  55
  56 }
  57
  58 static struct snd_soc_ops openrd_client_ops = {
  59         .hw_params = openrd_client_hw_params,
  60 };
  61
  62
  63 static struct snd_soc_dai_link openrd_client_dai[] = {
  64 {
  65         .name = "CS42L51",
  66         .stream_name = "CS42L51 HiFi",
  67         .cpu_dai_name = "kirkwood-i2s",
  68         .platform_name = "kirkwood-pcm-audio",
  69         .codec_dai_name = "cs42l51_hifi",
  70         .codec_name = "cs42l51-codec.0-004a",
  71         .ops = &openrd_client_ops,
  72 },
  73 };
  74
  75
  76 static struct snd_soc_card openrd_client = {
  77         .name = "OpenRD Client",
  78         .dai_link = openrd_client_dai,
  79         .num_links = ARRAY_SIZE(openrd_client_dai),
  80 };
  81
  82 static struct platform_device *openrd_client_snd_device;
  83
  84 static int __init openrd_client_init(void)
  85 {
  86         int ret;
  87
  88         if (!machine_is_openrd_client())
  89                 return 0;
  90
  91         openrd_client_snd_device = platform_device_alloc("soc-audio", -1);
  92         if (!openrd_client_snd_device)
  93                 return -ENOMEM;
  94
  95         platform_set_drvdata(openrd_client_snd_device,
  96                         &openrd_client);
  97
  98         ret = platform_device_add(openrd_client_snd_device);
  99         if (ret) {
 100                 printk(KERN_ERR "%s: platform_device_add failed\n", __func__);
 101                 platform_device_put(openrd_client_snd_device);
 102         }
 103
 104         return ret;
 105 }
 106
 107 static void __exit openrd_client_exit(void)
 108 {
 109         platform_device_unregister(openrd_client_snd_device);
 110 }
 111
 112 module_init(openrd_client_init);
 113 module_exit(openrd_client_exit);
 114
 115 /* Module information */
 116 MODULE_AUTHOR("Arnaud Patard <apatard@mandriva.com>");
 117 MODULE_DESCRIPTION("ALSA SoC OpenRD Client");
 118 MODULE_LICENSE("GPL");
 119 MODULE_ALIAS("platform:soc-audio");