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 /* platform specific structs can be declared here */
  20 extern struct snd_soc_dai_driver sh4_hac_dai[2];
  21 extern struct snd_soc_platform_driver sh7760_soc_platform;
  22
  23 static struct snd_soc_dai_link sh7760_ac97_dai = {
  24         .name = "AC97",
  25         .stream_name = "AC97 HiFi",
  26         .cpu_dai_name = "hac-dai.0",    /* HAC0 */
  27         .codec_dai_name = "ac97-hifi",
  28         .platform_name = "sh7760-pcm-audio",
  29         .codec_name = "ac97-codec",
  30         .ops = NULL,
  31 };
  32
  33 static struct snd_soc_card sh7760_ac97_soc_machine  = {
  34         .name = "SH7760 AC97",
  35         .dai_link = &sh7760_ac97_dai,
  36         .num_links = 1,
  37 };
  38
  39 static struct platform_device *sh7760_ac97_snd_device;
  40
  41 static int __init sh7760_ac97_init(void)
  42 {
  43         int ret;
  44         unsigned short ipsel;
  45
  46         /* enable both AC97 controllers in pinmux reg */
  47         ipsel = __raw_readw(IPSEL);
  48         __raw_writew(ipsel | (3 << 10), IPSEL);
  49
  50         ret = -ENOMEM;
  51         sh7760_ac97_snd_device = platform_device_alloc("soc-audio", -1);
  52         if (!sh7760_ac97_snd_device)
  53                 goto out;
  54
  55         platform_set_drvdata(sh7760_ac97_snd_device,
  56                              &sh7760_ac97_soc_machine);
  57         ret = platform_device_add(sh7760_ac97_snd_device);
  58
  59         if (ret)
  60                 platform_device_put(sh7760_ac97_snd_device);
  61
  62 out:
  63         return ret;
  64 }
  65
  66 static void __exit sh7760_ac97_exit(void)
  67 {
  68         platform_device_unregister(sh7760_ac97_snd_device);
  69 }
  70
  71 module_init(sh7760_ac97_init);
  72 module_exit(sh7760_ac97_exit);
  73
  74 MODULE_LICENSE("GPL");
  75 MODULE_DESCRIPTION("Generic SH7760 AC97 sound machine");
  76 MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");