sound/soc/au1x/db1200.c

   1 /*
   2  * DB1200 ASoC audio fabric support code.
   3  *
   4  * (c) 2008-9 Manuel Lauss <manuel.lauss@gmail.com>
   5  *
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/moduleparam.h>
  10 #include <linux/timer.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/platform_device.h>
  13 #include <sound/core.h>
  14 #include <sound/pcm.h>
  15 #include <sound/soc.h>
  16 #include <asm/mach-au1x00/au1000.h>
  17 #include <asm/mach-au1x00/au1xxx_psc.h>
  18 #include <asm/mach-au1x00/au1xxx_dbdma.h>
  19 #include <asm/mach-db1x00/bcsr.h>
  20
  21 #include "../codecs/wm8731.h"
  22 #include "psc.h"
  23
  24 /*-------------------------  AC97 PART  ---------------------------*/
  25
  26 static struct snd_soc_dai_link db1200_ac97_dai = {
  27         .name           = "AC97",
  28         .stream_name    = "AC97 HiFi",
  29         .codec_dai_name = "ac97-hifi",
  30         .cpu_dai_name   = "au1xpsc_ac97.1",
  31         .platform_name  = "au1xpsc-pcm.1",
  32         .codec_name     = "ac97-codec.1",
  33 };
  34
  35 static struct snd_soc_card db1200_ac97_machine = {
  36         .name           = "DB1200_AC97",
  37         .dai_link       = &db1200_ac97_dai,
  38         .num_links      = 1,
  39 };
  40
  41 /*-------------------------  I2S PART  ---------------------------*/
  42
  43 static int db1200_i2s_startup(struct snd_pcm_substream *substream)
  44 {
  45         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  46         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  47         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  48         int ret;
  49
  50         /* WM8731 has its own 12MHz crystal */
  51         snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
  52                                 12000000, SND_SOC_CLOCK_IN);
  53
  54         /* codec is bitclock and lrclk master */
  55         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_LEFT_J |
  56                         SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
  57         if (ret < 0)
  58                 goto out;
  59
  60         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_LEFT_J |
  61                         SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
  62         if (ret < 0)
  63                 goto out;
  64
  65         ret = 0;
  66 out:
  67         return ret;
  68 }
  69
  70 static struct snd_soc_ops db1200_i2s_wm8731_ops = {
  71         .startup        = db1200_i2s_startup,
  72 };
  73
  74 static struct snd_soc_dai_link db1200_i2s_dai = {
  75         .name           = "WM8731",
  76         .stream_name    = "WM8731 PCM",
  77         .codec_dai_name = "wm8731-hifi",
  78         .cpu_dai_name   = "au1xpsc_i2s.1",
  79         .platform_name  = "au1xpsc-pcm.1",
  80         .codec_name     = "wm8731.0-001b",
  81         .ops            = &db1200_i2s_wm8731_ops,
  82 };
  83
  84 static struct snd_soc_card db1200_i2s_machine = {
  85         .name           = "DB1200_I2S",
  86         .dai_link       = &db1200_i2s_dai,
  87         .num_links      = 1,
  88 };
  89
  90 /*-------------------------  COMMON PART  ---------------------------*/
  91
  92 static struct platform_device *db1200_asoc_dev;
  93
  94 static int __init db1200_audio_load(void)
  95 {
  96         int ret;
  97
  98         ret = -ENOMEM;
  99         db1200_asoc_dev = platform_device_alloc("soc-audio", 1); /* PSC1 */
 100         if (!db1200_asoc_dev)
 101                 goto out;
 102
 103         /* DB1200 board setup set PSC1MUX to preferred audio device */
 104         if (bcsr_read(BCSR_RESETS) & BCSR_RESETS_PSC1MUX)
 105                 platform_set_drvdata(db1200_asoc_dev, &db1200_i2s_machine);
 106         else
 107                 platform_set_drvdata(db1200_asoc_dev, &db1200_ac97_machine);
 108
 109         ret = platform_device_add(db1200_asoc_dev);
 110
 111         if (ret) {
 112                 platform_device_put(db1200_asoc_dev);
 113                 db1200_asoc_dev = NULL;
 114         }
 115 out:
 116         return ret;
 117 }
 118
 119 static void __exit db1200_audio_unload(void)
 120 {
 121         platform_device_unregister(db1200_asoc_dev);
 122 }
 123
 124 module_init(db1200_audio_load);
 125 module_exit(db1200_audio_unload);
 126
 127 MODULE_LICENSE("GPL");
 128 MODULE_DESCRIPTION("DB1200 ASoC audio support");
 129 MODULE_AUTHOR("Manuel Lauss");