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 <sound/soc-dapm.h>
  16 #include <asm/io.h>
  17
  18 #define IPSEL 0xFE400034
  19
  20 /* platform specific structs can be declared here */
  21 extern struct snd_soc_dai_driver sh4_hac_dai[2];
  22 extern struct snd_soc_platform_driver sh7760_soc_platform;
  23
  24 static int machine_init(struct snd_soc_pcm_runtime *rtd)
  25 {
  26         snd_soc_dapm_sync(rtd->codec);
  27         return 0;
  28 }
  29
  30 static struct snd_soc_dai_link sh7760_ac97_dai = {
  31         .name = "AC97",
  32         .stream_name = "AC97 HiFi",
  33         .cpu_dai_name = "hac-dai.0",    /* HAC0 */
  34         .codec_dai_name = "ac97-hifi",
  35         .platform_name = "sh7760-pcm-audio",
  36         .codec_name = "ac97-codec",
  37         .init = machine_init,
  38         .ops = NULL,
  39 };
  40
  41 static struct snd_soc_card sh7760_ac97_soc_machine  = {
  42         .name = "SH7760 AC97",
  43         .dai_link = &sh7760_ac97_dai,
  44         .num_links = 1,
  45 };
  46
  47 static struct platform_device *sh7760_ac97_snd_device;
  48
  49 static int __init sh7760_ac97_init(void)
  50 {
  51         int ret;
  52         unsigned short ipsel;
  53
  54         /* enable both AC97 controllers in pinmux reg */
  55         ipsel = __raw_readw(IPSEL);
  56         __raw_writew(ipsel | (3 << 10), IPSEL);
  57
  58         ret = -ENOMEM;
  59         sh7760_ac97_snd_device = platform_device_alloc("soc-audio", -1);
  60         if (!sh7760_ac97_snd_device)
  61                 goto out;
  62
  63         platform_set_drvdata(sh7760_ac97_snd_device,
  64                              &sh7760_ac97_soc_machine);
  65         ret = platform_device_add(sh7760_ac97_snd_device);
  66
  67         if (ret)
  68                 platform_device_put(sh7760_ac97_snd_device);
  69
  70 out:
  71         return ret;
  72 }
  73
  74 static void __exit sh7760_ac97_exit(void)
  75 {
  76         platform_device_unregister(sh7760_ac97_snd_device);
  77 }
  78
  79 module_init(sh7760_ac97_init);
  80 module_exit(sh7760_ac97_exit);
  81
  82 MODULE_LICENSE("GPL");
  83 MODULE_DESCRIPTION("Generic SH7760 AC97 sound machine");
  84 MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");