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/ac97.h"
  23 #include "../codecs/wm8731.h"
  24 #include "psc.h"
  25
  26 /*-------------------------  AC97 PART  ---------------------------*/
  27
  28 static struct snd_soc_dai_link db1200_ac97_dai = {
  29         .name           = "AC97",
  30         .stream_name    = "AC97 HiFi",
  31         .cpu_dai        = &au1xpsc_ac97_dai,
  32         .codec_dai      = &ac97_dai,
  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         .platform       = &au1xpsc_soc_platform,
  40 };
  41
  42 static struct snd_soc_device db1200_ac97_devdata = {
  43         .card           = &db1200_ac97_machine,
  44         .codec_dev      = &soc_codec_dev_ac97,
  45 };
  46
  47 /*-------------------------  I2S PART  ---------------------------*/
  48
  49 static int db1200_i2s_startup(struct snd_pcm_substream *substream)
  50 {
  51         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  52         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  53         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  54         int ret;
  55
  56         /* WM8731 has its own 12MHz crystal */
  57         snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK,
  58                                 12000000, SND_SOC_CLOCK_IN);
  59
  60         /* codec is bitclock and lrclk master */
  61         ret = snd_soc_dai_set_fmt(codec_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 = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_LEFT_J |
  67                         SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
  68         if (ret < 0)
  69                 goto out;
  70
  71         ret = 0;
  72 out:
  73         return ret;
  74 }
  75
  76 static struct snd_soc_ops db1200_i2s_wm8731_ops = {
  77         .startup        = db1200_i2s_startup,
  78 };
  79
  80 static struct snd_soc_dai_link db1200_i2s_dai = {
  81         .name           = "WM8731",
  82         .stream_name    = "WM8731 PCM",
  83         .cpu_dai        = &au1xpsc_i2s_dai,
  84         .codec_dai      = &wm8731_dai,
  85         .ops            = &db1200_i2s_wm8731_ops,
  86 };
  87
  88 static struct snd_soc_card db1200_i2s_machine = {
  89         .name           = "DB1200_I2S",
  90         .dai_link       = &db1200_i2s_dai,
  91         .num_links      = 1,
  92         .platform       = &au1xpsc_soc_platform,
  93 };
  94
  95 static struct snd_soc_device db1200_i2s_devdata = {
  96         .card           = &db1200_i2s_machine,
  97         .codec_dev      = &soc_codec_dev_wm8731,
  98 };
  99
 100 /*-------------------------  COMMON PART  ---------------------------*/
 101
 102 static struct platform_device *db1200_asoc_dev;
 103
 104 static int __init db1200_audio_load(void)
 105 {
 106         int ret;
 107
 108         ret = -ENOMEM;
 109         db1200_asoc_dev = platform_device_alloc("soc-audio", -1);
 110         if (!db1200_asoc_dev)
 111                 goto out;
 112
 113         /* DB1200 board setup set PSC1MUX to preferred audio device */
 114         if (bcsr_read(BCSR_RESETS) & BCSR_RESETS_PSC1MUX)
 115                 platform_set_drvdata(db1200_asoc_dev, &db1200_i2s_devdata);
 116         else
 117                 platform_set_drvdata(db1200_asoc_dev, &db1200_ac97_devdata);
 118
 119         db1200_ac97_devdata.dev = &db1200_asoc_dev->dev;
 120         db1200_i2s_devdata.dev = &db1200_asoc_dev->dev;
 121         ret = platform_device_add(db1200_asoc_dev);
 122
 123         if (ret) {
 124                 platform_device_put(db1200_asoc_dev);
 125                 db1200_asoc_dev = NULL;
 126         }
 127 out:
 128         return ret;
 129 }
 130
 131 static void __exit db1200_audio_unload(void)
 132 {
 133         platform_device_unregister(db1200_asoc_dev);
 134 }
 135
 136 module_init(db1200_audio_load);
 137 module_exit(db1200_audio_unload);
 138
 139 MODULE_LICENSE("GPL");
 140 MODULE_DESCRIPTION("DB1200 ASoC audio support");
 141 MODULE_AUTHOR("Manuel Lauss");