linux-2.6.33/snd_card_register()

参照元†

• linux-2.6.33/snd_soc_instantiate_card()

説明†

• パス: linux-2.6.33/sound/core/init.c

• FIXME: これは何？
  • 説明

引数†

• struct snd_card *card
  • linux-2.6.33/snd_card

返り値†

• int

参考†

実装†

/**
 *  snd_card_register - register the soundcard
 *  @card: soundcard structure
 *
 *  This function registers all the devices assigned to the soundcard.
 *  Until calling this, the ALSA control interface is blocked from the
 *  external accesses.  Thus, you should call this function at the end
 *  of the initialization of the card.
 *
 *  Returns zero otherwise a negative error code if the registrain failed.
 */
int snd_card_register(struct snd_card *card)
{
	int err;

	if (snd_BUG_ON(!card))
		return -EINVAL;

• • linux-2.6.33/snd_BUG_ON()

#ifndef CONFIG_SYSFS_DEPRECATED

• • linux-2.6.33/CONFIG_SYSFS_DEPRECATED

	if (!card->card_dev) {
		card->card_dev = device_create(sound_class, card->dev,
					       MKDEV(0, 0), card,
					       "card%i", card->number);
		if (IS_ERR(card->card_dev))
			card->card_dev = NULL;
	}

• • linux-2.6.33/device_create()

• linux-2.6.33/sound_class(global)

• • linux-2.6.33/IS_ERR()

#endif
	if ((err = snd_device_register_all(card)) < 0)
		return err;

• • linux-2.6.33/snd_device_register_all()

	mutex_lock(&snd_card_mutex);
	if (snd_cards[card->number]) {
		/* already registered */
		mutex_unlock(&snd_card_mutex);
		return 0;
	}

• • linux-2.6.33/mutex_lock()

• linux-2.6.33/mutex_unlock()

• • linux-2.6.33/snd_card_mutex(global)

	snd_card_set_id_no_lock(card, card->id[0] == '\0' ? NULL : card->id);
	snd_cards[card->number] = card;
	mutex_unlock(&snd_card_mutex);
	init_info_for_card(card);

• • linux-2.6.33/init_info_for_card()

#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)

• • linux-2.6.33/CONFIG_SND_MIXER_OSS

• linux-2.6.33/CONFIG_SND_MIXER_OSS_MODULE

	if (snd_mixer_oss_notify_callback)
		snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_REGISTER);

• • linux-2.6.33/snd_mixer_oss_notify_callback(global)

#endif
#ifndef CONFIG_SYSFS_DEPRECATED
	if (card->card_dev) {
		err = device_create_file(card->card_dev, &card_id_attrs);
		if (err < 0)
			return err;
		err = device_create_file(card->card_dev, &card_number_attrs);
		if (err < 0)
			return err;
	}

• • linux-2.6.33/device_create_file()

• linux-2.6.33/card_id_attrs(global)

• • linux-2.6.33/card_number_attrs(global)

#endif
	return 0;
}

EXPORT_SYMBOL(snd_card_register);

• ライセンスに関係なくシンボルを公開する。
  • linux-2.6.33/EXPORT_SYMBOL()

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