sound/soc/au1x/db1200.c

   1 /*
   2  * DB1200 ASoC audio fabric support code.
   3  *
   4  * (c) 2008-2011 Manuel Lauss <manuel.lauss@googlemail.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 static struct platform_device_id db1200_pids[] = {
  25         {
  26                 .name           = "db1200-ac97",
  27                 .driver_data    = 0,
  28         }, {
  29                 .name           = "db1200-i2s",
  30                 .driver_data    = 1,
  31         },
  32         {},
  33 };
  34
  35 /*-------------------------  AC97 PART  ---------------------------*/
  36
  37 static struct snd_soc_dai_link db1200_ac97_dai = {
  38         .name           = "AC97",
  39         .stream_name    = "AC97 HiFi",
  40         .codec_dai_name = "ac97-hifi",
  41         .cpu_dai_name   = "au1xpsc_ac97.1",
  42         .platform_name  = "au1xpsc-pcm.1",
  43         .codec_name     = "ac97-codec.1",
  44 };
  45
  46 static struct snd_soc_card db1200_ac97_machine = {
  47         .name           = "DB1200_AC97",
  48         .dai_link       = &db1200_ac97_dai,
  49         .num_links      = 1,
  50 };
  51
  52 /*-------------------------  I2S PART  ---------------------------*/
  53
  54 static int db1200_i2s_startup(struct snd_pcm_substream *substream)
  55 {
  56         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  57         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  58         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  59         int ret;
  60
  61         /* WM8731 has its own 12MHz crystal */
  62         snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
  63                                 12000000, SND_SOC_CLOCK_IN);
  64
  65         /* codec is bitclock and lrclk master */
  66         ret = snd_soc_dai_set_fmt(codec_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 = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_LEFT_J |
  72                         SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
  73         if (ret < 0)
  74                 goto out;
  75
  76         ret = 0;
  77 out:
  78         return ret;
  79 }
  80
  81 static struct snd_soc_ops db1200_i2s_wm8731_ops = {
  82         .startup        = db1200_i2s_startup,
  83 };
  84
  85 static struct snd_soc_dai_link db1200_i2s_dai = {
  86         .name           = "WM8731",
  87         .stream_name    = "WM8731 PCM",
  88         .codec_dai_name = "wm8731-hifi",
  89         .cpu_dai_name   = "au1xpsc_i2s.1",
  90         .platform_name  = "au1xpsc-pcm.1",
  91         .codec_name     = "wm8731.0-001b",
  92         .ops            = &db1200_i2s_wm8731_ops,
  93 };
  94
  95 static struct snd_soc_card db1200_i2s_machine = {
  96         .name           = "DB1200_I2S",
  97         .dai_link       = &db1200_i2s_dai,
  98         .num_links      = 1,
  99 };
 100
 101 /*-------------------------  COMMON PART  ---------------------------*/
 102
 103 static struct snd_soc_card *db1200_cards[] __devinitdata = {
 104         &db1200_ac97_machine,
 105         &db1200_i2s_machine,
 106 };
 107
 108 static int __devinit db1200_audio_probe(struct platform_device *pdev)
 109 {
 110         const struct platform_device_id *pid = platform_get_device_id(pdev);
 111         struct snd_soc_card *card;
 112
 113         card = db1200_cards[pid->driver_data];
 114         card->dev = &pdev->dev;
 115         return snd_soc_register_card(card);
 116 }
 117
 118 static int __devexit db1200_audio_remove(struct platform_device *pdev)
 119 {
 120         struct snd_soc_card *card = platform_get_drvdata(pdev);
 121         snd_soc_unregister_card(card);
 122         return 0;
 123 }
 124
 125 static struct platform_driver db1200_audio_driver = {
 126         .driver = {
 127                 .name   = "db1200-ac97",
 128                 .owner  = THIS_MODULE,
 129                 .pm     = &snd_soc_pm_ops,
 130         },
 131         .id_table       = db1200_pids,
 132         .probe          = db1200_audio_probe,
 133         .remove         = __devexit_p(db1200_audio_remove),
 134 };
 135
 136 static int __init db1200_audio_load(void)
 137 {
 138         return platform_driver_register(&db1200_audio_driver);
 139 }
 140
 141 static void __exit db1200_audio_unload(void)
 142 {
 143         platform_driver_unregister(&db1200_audio_driver);
 144 }
 145
 146 module_init(db1200_audio_load);
 147 module_exit(db1200_audio_unload);
 148
 149 MODULE_LICENSE("GPL");
 150 MODULE_DESCRIPTION("DB1200 ASoC audio support");
 151 MODULE_AUTHOR("Manuel Lauss");