release/src-rt-6.x.4708/linux/linux-2.6.36/sound/soc/imx/phycore-ac97.c

   1 /*
   2  * phycore-ac97.c  --  SoC audio for imx_phycore in AC97 mode
   3  *
   4  * Copyright 2009 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
   5  *
   6  *  This program is free software; you can redistribute  it and/or modify it
   7  *  under  the terms of  the GNU General  Public License as published by the
   8  *  Free Software Foundation;  either version 2 of the  License, or (at your
   9  *  option) any later version.
  10  *
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/device.h>
  16 #include <linux/i2c.h>
  17 #include <sound/core.h>
  18 #include <sound/pcm.h>
  19 #include <sound/soc.h>
  20 #include <sound/soc-dapm.h>
  21 #include <asm/mach-types.h>
  22
  23 #include "../codecs/wm9712.h"
  24 #include "imx-ssi.h"
  25
  26 static struct snd_soc_card imx_phycore;
  27
  28 static struct snd_soc_ops imx_phycore_hifi_ops = {
  29 };
  30
  31 static struct snd_soc_dai_link imx_phycore_dai_ac97[] = {
  32         {
  33                 .name           = "HiFi",
  34                 .stream_name    = "HiFi",
  35                 .codec_dai      = &wm9712_dai[WM9712_DAI_AC97_HIFI],
  36                 .ops            = &imx_phycore_hifi_ops,
  37         },
  38 };
  39
  40 static struct snd_soc_card imx_phycore = {
  41         .name           = "PhyCORE-audio",
  42         .platform       = &imx_soc_platform,
  43         .dai_link       = imx_phycore_dai_ac97,
  44         .num_links      = ARRAY_SIZE(imx_phycore_dai_ac97),
  45 };
  46
  47 static struct snd_soc_device imx_phycore_snd_devdata = {
  48         .card           = &imx_phycore,
  49         .codec_dev      = &soc_codec_dev_wm9712,
  50 };
  51
  52 static struct platform_device *imx_phycore_snd_device;
  53
  54 static int __init imx_phycore_init(void)
  55 {
  56         int ret;
  57
  58         if (!machine_is_pcm043() && !machine_is_pca100())
  59                 /* return happy. We might run on a totally different machine */
  60                 return 0;
  61
  62         imx_phycore_snd_device = platform_device_alloc("soc-audio", -1);
  63         if (!imx_phycore_snd_device)
  64                 return -ENOMEM;
  65
  66         imx_phycore_dai_ac97[0].cpu_dai = &imx_ssi_pcm_dai[0];
  67
  68         platform_set_drvdata(imx_phycore_snd_device, &imx_phycore_snd_devdata);
  69         imx_phycore_snd_devdata.dev = &imx_phycore_snd_device->dev;
  70         ret = platform_device_add(imx_phycore_snd_device);
  71
  72         if (ret) {
  73                 printk(KERN_ERR "ASoC: Platform device allocation failed\n");
  74                 platform_device_put(imx_phycore_snd_device);
  75         }
  76
  77         return ret;
  78 }
  79
  80 static void __exit imx_phycore_exit(void)
  81 {
  82         platform_device_unregister(imx_phycore_snd_device);
  83 }
  84
  85 late_initcall(imx_phycore_init);
  86 module_exit(imx_phycore_exit);
  87
  88 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
  89 MODULE_DESCRIPTION("PhyCORE ALSA SoC driver");
  90 MODULE_LICENSE("GPL");