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
  19/* platform specific structs can be declared here */
  20extern struct snd_soc_dai_driver sh4_hac_dai[2];
  21extern struct snd_soc_platform_driver sh7760_soc_platform;
  22
  23static int machine_init(struct snd_soc_pcm_runtime *rtd)
  24{
  25        snd_soc_dapm_sync(&rtd->codec->dapm);
  26        return 0;
  27}
  28
  29static 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
  40static struct snd_soc_card sh7760_ac97_soc_machine  = {
  41        .name = "SH7760 AC97",
  42        .dai_link = &sh7760_ac97_dai,
  43        .num_links = 1,
  44};
  45
  46static struct platform_device *sh7760_ac97_snd_device;
  47
  48static 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
  69out:
  70        return ret;
  71}
  72
  73static void __exit sh7760_ac97_exit(void)
  74{
  75        platform_device_unregister(sh7760_ac97_snd_device);
  76}
  77
  78module_init(sh7760_ac97_init);
  79module_exit(sh7760_ac97_exit);
  80
  81MODULE_LICENSE("GPL");
  82MODULE_DESCRIPTION("Generic SH7760 AC97 sound machine");
  83MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");
  84