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 <sound/soc-dapm.h>
  17 #include <asm/mach-au1x00/au1000.h>
  18 #include <asm/mach-au1x00/au1xxx_psc.h>
  19 #include <asm/mach-au1x00/au1xxx_dbdma.h>
  20 #include <asm/mach-db1x00/bcsr.h>
  21
  22 #include "../codecs/wm8731.h"
  23 #include "psc.h"
  24
  25 /*-------------------------  AC97 PART  ---------------------------*/
  26
  27 static struct snd_soc_dai_link db1200_ac97_dai = {
  28         .name           = "AC97",
  29         .stream_name    = "AC97 HiFi",
  30         .cpu_dai_name   = "au1xpsc-ac97",
  31         .codec_dai_name = "ac97-hifi",
  32         .platform_name  =  "au1xpsc-pcm-audio",
  33         .codec_name     = "ac97-codec",
  34 };
  35
  36 static struct snd_soc_card db1200_ac97_machine = {
  37         .name           = "DB1200_AC97",
  38         .dai_link       = &db1200_ac97_dai,
  39         .num_links      = 1,
  40 };
  41
  42 /*-------------------------  I2S PART  ---------------------------*/
  43
  44 static int db1200_i2s_startup(struct snd_pcm_substream *substream)
  45 {
  46         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  47         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  48         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  49         int ret;
  50
  51         /* WM8731 has its own 12MHz crystal */
  52         snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK,
  53                                 12000000, SND_SOC_CLOCK_IN);
  54
  55         /* codec is bitclock and lrclk master */
  56         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_LEFT_J |
  57                         SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
  58         if (ret < 0)
  59                 goto out;
  60
  61         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_LEFT_J |
  62                         SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
  63         if (ret < 0)
  64                 goto out;
  65
  66         ret = 0;
  67 out:
  68         return ret;
  69 }
  70
  71 static struct snd_soc_ops db1200_i2s_wm8731_ops = {
  72         .startup        = db1200_i2s_startup,
  73 };
  74
  75 static struct snd_soc_dai_link db1200_i2s_dai = {
  76         .name           = "WM8731",
  77         .stream_name    = "WM8731 PCM",
  78         .cpu_dai_name   = "au1xpsc",
  79         .codec_dai_name = "wm8731-hifi"
  80         .platform_name  = "au1xpsc-pcm-audio",
  81         .codec_name     = "wm8731-codec.0-001a",
  82         .ops            = &db1200_i2s_wm8731_ops,
  83 };
  84
  85 static struct snd_soc_card db1200_i2s_machine = {
  86         .name           = "DB1200_I2S",
  87         .dai_link       = &db1200_i2s_dai,
  88         .num_links      = 1,
  89 };
  90
  91 /*-------------------------  COMMON PART  ---------------------------*/
  92
  93 static struct platform_device *db1200_asoc_dev;
  94
  95 static int __init db1200_audio_load(void)
  96 {
  97         int ret;
  98
  99         ret = -ENOMEM;
 100         db1200_asoc_dev = platform_device_alloc("soc-audio", -1);
 101         if (!db1200_asoc_dev)
 102                 goto out;
 103
 104         /* DB1200 board setup set PSC1MUX to preferred audio device */
 105         if (bcsr_read(BCSR_RESETS) & BCSR_RESETS_PSC1MUX)
 106                 platform_set_drvdata(db1200_asoc_dev, &db1200_i2s_machine);
 107         else
 108                 platform_set_drvdata(db1200_asoc_dev, &db1200_ac97_machine);
 109
 110         ret = platform_device_add(db1200_asoc_dev);
 111
 112         if (ret) {
 113                 platform_device_put(db1200_asoc_dev);
 114                 db1200_asoc_dev = NULL;
 115         }
 116 out:
 117         return ret;
 118 }
 119
 120 static void __exit db1200_audio_unload(void)
 121 {
 122         platform_device_unregister(db1200_asoc_dev);
 123 }
 124
 125 module_init(db1200_audio_load);
 126 module_exit(db1200_audio_unload);
 127
 128 MODULE_LICENSE("GPL");
 129 MODULE_DESCRIPTION("DB1200 ASoC audio support");
 130 MODULE_AUTHOR("Manuel Lauss");