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