kernel/sound/soc/sh/sh7760-ac97.c

   1 /*
   2  * Generic AC97 sound support for SH7760
   3  *
   4  * (c) 2007 Manuel Lauss
   5  *
   6  * Licensed under the GPLv2.
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/moduleparam.h>
  11 #include <linux/platform_device.h>
  12 #include <sound/core.h>
  13 #include <sound/pcm.h>
  14 #include <sound/soc.h>
  15 #include <asm/io.h>
  16
  17 #define IPSEL 0xFE400034
  18
  19 static struct snd_soc_dai_link sh7760_ac97_dai = {
  20         .name = "AC97",
  21         .stream_name = "AC97 HiFi",
  22         .cpu_dai_name = "hac-dai.0",    /* HAC0 */
  23         .codec_dai_name = "ac97-hifi",
  24         .platform_name = "sh7760-pcm-audio",
  25         .codec_name = "ac97-codec",
  26         .ops = NULL,
  27 };
  28
  29 static struct snd_soc_card sh7760_ac97_soc_machine  = {
  30         .name = "SH7760 AC97",
  31         .owner = THIS_MODULE,
  32         .dai_link = &sh7760_ac97_dai,
  33         .num_links = 1,
  34 };
  35
  36 static struct platform_device *sh7760_ac97_snd_device;
  37
  38 static int __init sh7760_ac97_init(void)
  39 {
  40         int ret;
  41         unsigned short ipsel;
  42
  43         /* enable both AC97 controllers in pinmux reg */
  44         ipsel = __raw_readw(IPSEL);
  45         __raw_writew(ipsel | (3 << 10), IPSEL);
  46
  47         ret = -ENOMEM;
  48         sh7760_ac97_snd_device = platform_device_alloc("soc-audio", -1);
  49         if (!sh7760_ac97_snd_device)
  50                 goto out;
  51
  52         platform_set_drvdata(sh7760_ac97_snd_device,
  53                              &sh7760_ac97_soc_machine);
  54         ret = platform_device_add(sh7760_ac97_snd_device);
  55
  56         if (ret)
  57                 platform_device_put(sh7760_ac97_snd_device);
  58
  59 out:
  60         return ret;
  61 }
  62
  63 static void __exit sh7760_ac97_exit(void)
  64 {
  65         platform_device_unregister(sh7760_ac97_snd_device);
  66 }
  67
  68 module_init(sh7760_ac97_init);
  69 module_exit(sh7760_ac97_exit);
  70
  71 MODULE_LICENSE("GPL");
  72 MODULE_DESCRIPTION("Generic SH7760 AC97 sound machine");
  73 MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");