LXR linux/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
  19static 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
  29static 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
  36static struct platform_device *sh7760_ac97_snd_device;
  37
  38static 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
  59out:
  60        return ret;
  61}
  62
  63static void __exit sh7760_ac97_exit(void)
  64{
  65        platform_device_unregister(sh7760_ac97_snd_device);
  66}
  67
  68module_init(sh7760_ac97_init);
  69module_exit(sh7760_ac97_exit);
  70
  71MODULE_LICENSE("GPL");
  72MODULE_DESCRIPTION("Generic SH7760 AC97 sound machine");
  73MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");
  74