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         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  30         int ret;
  31         unsigned int freq, fmt;
  32
  33         fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS;
  34         ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
  35         if (ret < 0)
  36                 return ret;
  37
  38         ret = snd_soc_dai_set_fmt(codec_dai, fmt);
  39         if (ret < 0)
  40                 return ret;
  41
  42         switch (params_rate(params)) {
  43         default:
  44         case 44100:
  45                 freq = 11289600;
  46                 break;
  47         case 48000:
  48                 freq = 12288000;
  49                 break;
  50         case 96000:
  51                 freq = 24576000;
  52                 break;
  53         }
  54
  55         return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);
  56
  57 }
  58
  59 static struct snd_soc_ops openrd_client_ops = {
  60         .hw_params = openrd_client_hw_params,
  61 };
  62
  63
  64 static struct snd_soc_dai_link openrd_client_dai[] = {
  65 {
  66         .name = "CS42L51",
  67         .stream_name = "CS42L51 HiFi",
  68         .cpu_dai_name = "kirkwood-i2s",
  69         .platform_name = "kirkwood-pcm-audio",
  70         .codec_dai_name = "cs42l51-hifi",
  71         .codec_name = "cs42l51-codec.0-004a",
  72         .ops = &openrd_client_ops,
  73 },
  74 };
  75
  76
  77 static struct snd_soc_card openrd_client = {
  78         .name = "OpenRD Client",
  79         .dai_link = openrd_client_dai,
  80         .num_links = ARRAY_SIZE(openrd_client_dai),
  81 };
  82
  83 static struct platform_device *openrd_client_snd_device;
  84
  85 static int __init openrd_client_init(void)
  86 {
  87         int ret;
  88
  89         if (!machine_is_openrd_client())
  90                 return 0;
  91
  92         openrd_client_snd_device = platform_device_alloc("soc-audio", -1);
  93         if (!openrd_client_snd_device)
  94                 return -ENOMEM;
  95
  96         platform_set_drvdata(openrd_client_snd_device,
  97                         &openrd_client);
  98
  99         ret = platform_device_add(openrd_client_snd_device);
 100         if (ret) {
 101                 printk(KERN_ERR "%s: platform_device_add failed\n", __func__);
 102                 platform_device_put(openrd_client_snd_device);
 103         }
 104
 105         return ret;
 106 }
 107
 108 static void __exit openrd_client_exit(void)
 109 {
 110         platform_device_unregister(openrd_client_snd_device);
 111 }
 112
 113 module_init(openrd_client_init);
 114 module_exit(openrd_client_exit);
 115
 116 /* Module information */
 117 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
 118 MODULE_DESCRIPTION("ALSA SoC OpenRD Client");
 119 MODULE_LICENSE("GPL");
 120 MODULE_ALIAS("platform:soc-audio");