path: root/sound/pci/oxygen/oxygen_mixer.c

/*
 * C-Media CMI8788 driver - mixer code
 *
 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
 *
 *
 *  This driver is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License, version 2.
 *
 *  This driver is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this driver; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <linux/mutex.h>
#include <sound/ac97_codec.h>
#include <sound/asoundef.h>
#include <sound/control.h>
#include <sound/tlv.h>
#include "oxygen.h"
#include "cm9780.h"

static int dac_volume_info(struct snd_kcontrol *ctl,
			   struct snd_ctl_elem_info *info)
{
	struct oxygen *chip = ctl->private_data;

	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	info->count = chip->model.dac_channels;
	info->value.integer.min = chip->model.dac_volume_min;
	info->value.integer.max = chip->model.dac_volume_max;
	return 0;
}

static int dac_volume_get(struct snd_kcontrol *ctl,
			  struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	unsigned int i;

	mutex_lock(&chip->mutex);
	for (i = 0; i < chip->model.dac_channels; ++i)
		value->value.integer.value[i] = chip->dac_volume[i];
	mutex_unlock(&chip->mutex);
	return 0;
}

static int dac_volume_put(struct snd_kcontrol *ctl,
			  struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	unsigned int i;
	int changed;

	changed = 0;
	mutex_lock(&chip->mutex);
	for (i = 0; i < chip->model.dac_channels; ++i)
		if (value->value.integer.value[i] != chip->dac_volume[i]) {
			chip->dac_volume[i] = value->value.integer.value[i];
			changed = 1;
		}
	if (changed)
		chip->model.update_dac_volume(chip);
	mutex_unlock(&chip->mutex);
	return changed;
}

static int dac_mute_get(struct snd_kcontrol *ctl,
			struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;

	mutex_lock(&chip->mutex);
	value->value.integer.value[0] = !chip->dac_mute;
	mutex_unlock(&chip->mutex);
	return 0;
}

static int dac_mute_put(struct snd_kcontrol *ctl,
			  struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	int changed;

	mutex_lock(&chip->mutex);
	changed = !value->value.integer.value[0] != chip->dac_mute;
	if (changed) {
		chip->dac_mute = !value->value.integer.value[0];
		chip->model.update_dac_mute(chip);
	}
	mutex_unlock(&chip->mutex);
	return changed;
}

static int upmix_info(struct snd_kcontrol *ctl, struct snd_ctl_elem_info *info)
{
	static const char *const names[5] = {
		"Front",
		"Front+Surround",
		"Front+Surround+Back",
		"Front+Surround+Center/LFE",
		"Front+Surround+Center/LFE+Back",
	};
	struct oxygen *chip = ctl->private_data;
	unsigned int count = chip->model.update_center_lfe_mix ? 5 : 3;

	info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	info->count = 1;
	info->value.enumerated.items = count;
	if (info->value.enumerated.item >= count)
		info->value.enumerated.item = count - 1;
	strcpy(info->value.enumerated.name, names[info->value