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

// SPDX-License-Identifier: GPL-2.0-only
/*
 * C-Media CMI8788 driver - mixer code
 *
 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
 */

#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_mixer;
	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_mixer; ++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_mixer; ++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 unsigned int upmix_item_count(struct oxygen *chip)
{
	if (chip->model.dac_channels_pcm < 8)
		return 2;
	else if (chip->model.update_center_lfe_mix)
		return 5;
	else
		return 3;
}

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 = upmix_item_count(chip);

	return snd_ctl_enum_info(info, 1, count, names);
}

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

	mutex_lock(&chip->mutex);
	value->value.enumerated.item[0] = chip->dac_routing;
	mutex_unlock(&chip->mutex);
	return 0;
}

void oxygen_update_dac_routing(struct oxygen *chip)
{
	/* DAC 0: front, DAC 1: surround, DAC 2: center/LFE, DAC 3: back */
	static const unsigned int reg_values[5] = {
		/* stereo -> front */
		(0 << OXYGEN_PLAY_DAC0_SOURCE_SHIF