sound/pci/oxygen/oxygen_mixer.c - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*
  * 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)
 {
 	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 	info->count = 8;
 	info->value.integer.min = 0;
 	info->value.integer.max = 0xff;
 	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 < 8; ++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 < 8; ++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[3] = {
 		"Front", "Front+Surround", "Front+Surround+Back"
 	};
 	info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 	info->count = 1;
 	info->value.enumerated.items = 3;
 	if (info->value.enumerated.item > 2)
 		info->value.enumerated.item = 2;
 	strcpy(info->value.enumerated.name, names[info->value.enumerated.item]);
 	return 0;
 }

 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[3] = {
 		/* stereo -> front */
 		(0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) |
 		(1 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) |
 		(2 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) |
 		(3 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT),
 		/* stereo -> front+surround */
 		(0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) |
 		(0 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) |
 		(2 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) |
 		(3 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT),
 		/* stereo -> front+surround+back */
 		(0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) |
 		(0 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) |
 		(2 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) |
 		(0 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT),
 	};
 	u8 channels;
 	unsigned int reg_value;

 	channels = oxygen_read8(chip, OXYGEN_PLAY_CHANNELS) &
 		OXYGEN_PLAY_CHANNELS_MASK;
 	if (channels == OXYGEN_PLAY_CHANNELS_2)
 		reg_value = reg_values[chip->dac_routing];
 	else if (channels == OXYGEN_PLAY_CHANNELS_8)
 		/* in 7.1 mode, "rear" channels go to the "back" jack */
 		reg_value = (0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) |
 			    (3 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) |
 			    (2 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) |
 			    (1 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT);
 	else
 		reg_value = (0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) |
 			    (1 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) |
 			    (2 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) |
 			    (3 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT);
 	oxygen_write16_masked(chip, OXYGEN_PLAY_ROUTING, reg_value,
 			      OXYGEN_PLAY_DAC0_SOURCE_MASK |
 			      OXYGEN_PLAY_DAC1_SOURCE_MASK |
 			      OXYGEN_PLAY_DAC2_SOURCE_MASK |
 			      OXYGEN_PLAY_DAC3_SOURCE_MASK);
 }

 static int upmix_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.enumerated.item[0] != chip->dac_routing;
 	if (changed) {
 		chip->dac_routing = min(value->value.enumerated.item[0], 2u);
 		spin_lock_irq(&chip->reg_lock);
 		oxygen_update_dac_routing(chip);
 		spin_unlock_irq(&chip->reg_lock);
 	}
 	mutex_unlock(&chip->mutex);
 	return changed;
 }

 static int spdif_switch_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->spdif_playback_enable;
 	mutex_unlock(&chip->mutex);
 	return 0;
 }

 static unsigned int oxygen_spdif_rate(unsigned int oxygen_rate)
 {
 	switch (oxygen_rate) {
 	case OXYGEN_RATE_32000:
 		return IEC958_AES3_CON_FS_32000 << OXYGEN_SPDIF_CS_RATE_SHIFT;
 	case OXYGEN_RATE_44100:
 		return IEC958_AES3_CON_FS_44100 << OXYGEN_SPDIF_CS_RATE_SHIFT;
 	default: /* OXYGEN_RATE_48000 */
 		return IEC958_AES3_CON_FS_48000 << OXYGEN_SPDIF_CS_RATE_SHIFT;
 	case OXYGEN_RATE_64000:
 		return 0xb << OXYGEN_SPDIF_CS_RATE_SHIFT;
 	case OXYGEN_RATE_88200:
 		return 0x8 << OXYGEN_SPDIF_CS_RATE_SHIFT;
 	case OXYGEN_RATE_96000:
 		return 0xa << OXYGEN_SPDIF_CS_RATE_SHIFT;
 	case OXYGEN_RATE_176400:
 		return 0xc << OXYGEN_SPDIF_CS_RATE_SHIFT;
 	case OXYGEN_RATE_192000:
 		return 0xe << OXYGEN_SPDIF_CS_RATE_SHIFT;
 	}
 }

 void oxygen_update_spdif_source(struct oxygen *chip)
 {
 	u32 old_control, new_control;
 	u16 old_routing, new_routing;
 	unsigned int oxygen_rate;

 	old_control = oxygen_read32(chip, OXYGEN_SPDIF_CONTROL);
 	old_routing = oxygen_read16(chip, OXYGEN_PLAY_ROUTING);
 	if (chip->pcm_active & (1 << PCM_SPDIF)) {
 		new_control = old_control | OXYGEN_SPDIF_OUT_ENABLE;
 		new_routing = (old_routing & ~OXYGEN_PLAY_SPDIF_MASK)
 			| OXYGEN_PLAY_SPDIF_SPDIF;
 		oxygen_rate = (old_control >> OXYGEN_SPDIF_OUT_RATE_SHIFT)
 			& OXYGEN_I2S_RATE_MASK;
 		/* S/PDIF rate was already set by the caller */
 	} else if ((chip->pcm_active & (1 << PCM_MULTICH)) &&
 		   chip->spdif_playback_enable) {
 		new_routing = (old_routing & ~OXYGEN_PLAY_SPDIF_MASK)
 			| OXYGEN_PLAY_SPDIF_MULTICH_01;
 		oxygen_rate = oxygen_read16(chip, OXYGEN_I2S_MULTICH_FORMAT)
 			& OXYGEN_I2S_RATE_MASK;
 		new_control = (old_control & ~OXYGEN_SPDIF_OUT_RATE_MASK) |
 			(oxygen_rate << OXYGEN_SPDIF_OUT_RATE_SHIFT) |
 			OXYGEN_SPDIF_OUT_ENABLE;
 	} else {
 		new_control = old_control & ~OXYGEN_SPDIF_OUT_ENABLE;
 		new_routing = old_routing;
 		oxygen_rate = OXYGEN_RATE_44100;
 	}
 	if (old_routing != new_routing) {
 		oxygen_write32(chip, OXYGEN_SPDIF_CONTROL,
 			       new_control & ~OXYGEN_SPDIF_OUT_ENABLE);
 		oxygen_write16(chip, OXYGEN_PLAY_ROUTING, new_routing);
 	}
 	if (new_control & OXYGEN_SPDIF_OUT_ENABLE)
 		oxygen_write32(chip, OXYGEN_SPDIF_OUTPUT_BITS,
 			       oxygen_spdif_rate(oxygen_rate) |
 			       ((chip->pcm_active & (1 << PCM_SPDIF)) ?
 				chip->spdif_pcm_bits : chip->spdif_bits));
 	oxygen_write32(chip, OXYGEN_SPDIF_CONTROL, new_control);
 }

 static int spdif_switch_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->spdif_playback_enable;
 	if (changed) {
 		chip->spdif_playback_enable = !!value->value.integer.value[0];
 		spin_lock_irq(&chip->reg_lock);
 		oxygen_update_spdif_source(chip);
 		spin_unlock_irq(&chip->reg_lock);
 	}
 	mutex_unlock(&chip->mutex);
 	return changed;
 }

 static int spdif_info(struct snd_kcontrol *ctl, struct snd_ctl_elem_info *info)
 {
 	info->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 	info->count = 1;
 	return 0;
 }

 static void oxygen_to_iec958(u32 bits, struct snd_ctl_elem_value *value)
 {
 	value->value.iec958.status[0] =
 		bits & (OXYGEN_SPDIF_NONAUDIO | OXYGEN_SPDIF_C |
 			OXYGEN_SPDIF_PREEMPHASIS);
 	value->value.iec958.status[1] = /* category and original */
 		bits >> OXYGEN_SPDIF_CATEGORY_SHIFT;
 }

 static u32 iec958_to_oxygen(struct snd_ctl_elem_value *value)
 {
 	u32 bits;

 	bits = value->value.iec958.status[0] &
 		(OXYGEN_SPDIF_NONAUDIO | OXYGEN_SPDIF_C |
 		 OXYGEN_SPDIF_PREEMPHASIS);
 	bits |= value->value.iec958.status[1] << OXYGEN_SPDIF_CATEGORY_SHIFT;
 	if (bits & OXYGEN_SPDIF_NONAUDIO)
 		bits |= OXYGEN_SPDIF_V;
 	return bits;
 }

 static inline void write_spdif_bits(struct oxygen *chip, u32 bits)
 {
 	oxygen_write32_masked(chip, OXYGEN_SPDIF_OUTPUT_BITS, bits,
 			      OXYGEN_SPDIF_NONAUDIO |
 			      OXYGEN_SPDIF_C |
 			      OXYGEN_SPDIF_PREEMPHASIS |
 			      OXYGEN_SPDIF_CATEGORY_MASK |
 			      OXYGEN_SPDIF_ORIGINAL |
 			      OXYGEN_SPDIF_V);
 }

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

 	mutex_lock(&chip->mutex);
 	oxygen_to_iec958(chip->spdif_bits, value);
 	mutex_unlock(&chip->mutex);
 	return 0;
 }

 static int spdif_default_put(struct snd_kcontrol *ctl,
 			     struct snd_ctl_elem_value *value)
 {
 	struct oxygen *chip = ctl->private_data;
 	u32 new_bits;
 	int changed;

 	new_bits = iec958_to_oxygen(value);
 	mutex_lock(&chip->mutex);
 	changed = new_bits != chip->spdif_bits;
 	if (changed) {
 		chip->spdif_bits = new_bits;
 		if (!(chip->pcm_active & (1 << PCM_SPDIF)))
 			write_spdif_bits(chip, new_bits);
 	}
 	mutex_unlock(&chip->mutex);
 	return changed;
 }

 static int spdif_mask_get(struct snd_kcontrol *ctl,
 			  struct snd_ctl_elem_value *value)
 {
 	value->value.iec958.status[0] = IEC958_AES0_NONAUDIO |
 		IEC958_AES0_CON_NOT_COPYRIGHT | IEC958_AES0_CON_EMPHASIS;
 	value->value.iec958.status[1] =
 		IEC958_AES1_CON_CATEGORY | IEC958_AES1_CON_ORIGINAL;
 	return 0;
 }

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

 	mutex_lock(&chip->mutex);
 	oxygen_to_iec958(chip->spdif_pcm_bits, value);
 	mutex_unlock(&chip->mutex);
 	return 0;
 }

 static int spdif_pcm_put(struct snd_kcontrol *ctl,
 			 struct snd_ctl_elem_value *value)
 {
 	struct oxygen *chip = ctl->private_data;
 	u32 new_bits;
 	int changed;

 	new_bits = iec958_to_oxygen(value);
 	mutex_lock(&chip->mutex);
 	changed = new_bits != chip->spdif_pcm_bits;
 	if (changed) {
 		chip->spdif_pcm_bits = new_bits;
 		if (chip->pcm_active & (1 << PCM_SPDIF))
 			write_spdif_bits(chip, new_bits);
 	}
 	mutex_unlock(&chip->mutex);
 	return changed;
 }

 static int spdif_input_mask_get(struct snd_kcontrol *ctl,
 				struct snd_ctl_elem_value *value)
 {
 	value->value.iec958.status[0] = 0xff;
 	value->value.iec958.status[1] = 0xff;
 	value->value.iec958.status[2] = 0xff;
 	value->value.iec958.status[3] = 0xff;
 	return 0;
 }

 static int spdif_input_default_get(struct snd_kcontrol *ctl,
 				   struct snd_ctl_elem_value *value)
 {
 	struct oxygen *chip = ctl->private_data;
 	u32 bits;

 	bits = oxygen_read32(chip, OXYGEN_SPDIF_INPUT_BITS);
 	value->value.iec958.status[0] = bits;
 	value->value.iec958.status[1] = bits >> 8;
 	value->value.iec958.status[2] = bits >> 16;
 	value->value.iec958.status[3] = bits >> 24;
 	return 0;
 }

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

 	value->value.integer.value[0] =
 		!!(oxygen_read32(chip, OXYGEN_SPDIF_CONTROL)
 		   & OXYGEN_SPDIF_LOOPBACK);
 	return 0;
 }

 static int spdif_loopback_put(struct snd_kcontrol *ctl,
 			      struct snd_ctl_elem_value *value)
 {
 	struct oxygen *chip = ctl->private_data;
 	u32 oldreg, newreg;
 	int changed;

 	spin_lock_irq(&chip->reg_lock);
 	oldreg = oxygen_read32(chip, OXYGEN_SPDIF_CONTROL);
 	if (value->value.integer.value[0])
 		newreg = oldreg | OXYGEN_SPDIF_LOOPBACK;
 	else
 		newreg = oldreg & ~OXYGEN_SPDIF_LOOPBACK;
 	changed = newreg != oldreg;
 	if (changed)
 		oxygen_write32(chip, OXYGEN_SPDIF_CONTROL, newreg);
 	spin_unlock_irq(&chip->reg_lock);
 	return changed;
 }

 static int ac97_switch_get(struct snd_kcontrol *ctl,
 			   struct snd_ctl_elem_value *value)
 {
 	struct oxygen *chip = ctl->private_data;
 	unsigned int index = ctl->private_value & 0xff;
 	unsigned int bitnr = (ctl->private_value >> 8) & 0xff;
 	int invert = ctl->private_value & (1 << 16);
 	u16 reg;

 	mutex_lock(&chip->mutex);
 	reg = oxygen_read_ac97(chip, 0, index);
 	mutex_unlock(&chip->mutex);
 	if (!(reg & (1 << bitnr)) ^ !invert)
 		value->value.integer.value[0] = 1;
 	else
 		value->value.integer.value[0] = 0;
 	return 0;
 }

 static void ac97_mute_ctl(struct oxygen *chip, unsigned int control)
 {
 	unsigned int index = chip->controls[control]->private_value & 0xff;
 	u16 value;

 	value = oxygen_read_ac97(chip, 0, index);
 	if (!(value & 0x8000)) {
 		oxygen_write_ac97(chip, 0, index, value | 0x8000);
 		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
 			       &chip->controls[control]->id);
 	}
 }

 static int ac97_switch_put(struct snd_kcontrol *ctl,
 			   struct snd_ctl_elem_value *value)
 {
 	struct oxygen *chip = ctl->private_data;
 	unsigned int index = ctl->private_value & 0xff;
 	unsigned int bitnr = (ctl->private_value >> 8) & 0xff;
 	int invert = ctl->private_value & (1 << 16);
 	u16 oldreg, newreg;
 	int change;

 	mutex_lock(&chip->mutex);
 	oldreg = oxygen_read_ac97(chip, 0, index);
 	newreg = oldreg;
 	if (!value->value.integer.value[0] ^ !invert)
 		newreg |= 1 << bitnr;
 	else
 		newreg &= ~(1 << bitnr);
 	change = newreg != oldreg;
 	if (change) {
 		oxygen_write_ac97(chip, 0, index, newreg);
 		if (index == AC97_LINE) {
 			oxygen_write_ac97_masked(chip, 0, CM9780_GPIO_STATUS,
 						 newreg & 0x8000 ?
 						 CM9780_GPO0 : 0, CM9780_GPO0);
 			if (!(newreg & 0x8000)) {
 				ac97_mute_ctl(chip, CONTROL_MIC_CAPTURE_SWITCH);
 				ac97_mute_ctl(chip, CONTROL_CD_CAPTURE_SWITCH);
 				ac97_mute_ctl(chip, CONTROL_AUX_CAPTURE_SWITCH);
 			}
 		} else if ((index == AC97_MIC || index == AC97_CD ||
 			    index == AC97_VIDEO || index == AC97_AUX) &&
 			   bitnr == 15 && !(newreg & 0x8000)) {
 			ac97_mute_ctl(chip, CONTROL_LINE_CAPTURE_SWITCH);
 			oxygen_write_ac97_masked(chip, 0, CM9780_GPIO_STATUS,
 						 CM9780_GPO0, CM9780_GPO0);
 		}
 	}
 	mutex_unlock(&chip->mutex);
 	return change;
 }

 static int ac97_volume_info(struct snd_kcontrol *ctl,
 			    struct snd_ctl_elem_info *info)
 {
 	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 	info->count = 2;
 	info->value.integer.min = 0;
 	info->value.integer.max = 0x1f;
 	return 0;
 }

 static int ac97_volume_get(struct snd_kcontrol *ctl,
 			   struct snd_ctl_elem_value *value)
 {
 	struct oxygen *chip = ctl->private_data;
 	unsigned int index = ctl->private_value;
 	u16 reg;

 	mutex_lock(&chip->mutex);
 	reg = oxygen_read_ac97(chip, 0, index);
 	mutex_unlock(&chip->mutex);
 	value->value.integer.value[0] = 31 - (reg & 0x1f);
 	value->value.integer.value[1] = 31 - ((reg >> 8) & 0x1f);
 	return 0;
 }

 static int ac97_volume_put(struct snd_kcontrol *ctl,
 			   struct snd_ctl_elem_value *value)
 {
 	struct oxygen *chip = ctl->private_data;
 	unsigned int index = ctl->private_value;
 	u16 oldreg, newreg;
 	int change;

 	mutex_lock(&chip->mutex);
 	oldreg = oxygen_read_ac97(chip, 0, index);
 	newreg = oldreg;
 	newreg = (newreg & ~0x1f) |
 		(31 - (value->value.integer.value[0] & 0x1f));
 	newreg = (newreg & ~0x1f00) |
 		((31 - (value->value.integer.value[0] & 0x1f)) << 8);
 	change = newreg != oldreg;
 	if (change)
 		oxygen_write_ac97(chip, 0, index, newreg);
 	mutex_unlock(&chip->mutex);
 	return change;
 }

 #define AC97_SWITCH(xname, index, bitnr, invert) { \
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
 		.name = xname, \
 		.info = snd_ctl_boolean_mono_info, \
 		.get = ac97_switch_get, \
 		.put = ac97_switch_put, \
 		.private_value = ((invert) << 16) | ((bitnr) << 8) | (index), \
 	}
 #define AC97_VOLUME(xname, index) { \
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
 		.name = xname, \
 		.info = ac97_volume_info, \
 		.get = ac97_volume_get, \
 		.put = ac97_volume_put, \
 		.tlv = { .p = ac97_db_scale, }, \
 		.private_value = (index), \
 	}

 static DECLARE_TLV_DB_SCALE(ac97_db_scale, -3450, 150, 0);

 static const struct snd_kcontrol_new controls[] = {
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 		.name = "Master Playback Volume",
 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 		.info = dac_volume_info,
 		.get = dac_volume_get,
 		.put = dac_volume_put,
 	},
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 		.name = "Master Playback Switch",
 		.info = snd_ctl_boolean_mono_info,
 		.get = dac_mute_get,
 		.put = dac_mute_put,
 	},
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 		.name = "Stereo Upmixing",
 		.info = upmix_info,
 		.get = upmix_get,
 		.put = upmix_put,
 	},
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, SWITCH),
 		.info = snd_ctl_boolean_mono_info,
 		.get = spdif_switch_get,
 		.put = spdif_switch_put,
 	},
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
 		.device = 1,
 		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
 		.info = spdif_info,
 		.get = spdif_default_get,
 		.put = spdif_default_put,
 	},
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
 		.device = 1,
 		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, CON_MASK),
 		.access = SNDRV_CTL_ELEM_ACCESS_READ,
 		.info = spdif_info,
 		.get = spdif_mask_get,
 	},
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
 		.device = 1,
 		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, PCM_STREAM),
 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
 			  SNDRV_CTL_ELEM_ACCESS_INACTIVE,
 		.info = spdif_info,
 		.get = spdif_pcm_get,
 		.put = spdif_pcm_put,
 	},
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
 		.device = 1,
 		.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, MASK),
 		.access = SNDRV_CTL_ELEM_ACCESS_READ,
 		.info = spdif_info,
 		.get = spdif_input_mask_get,
 	},
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
 		.device = 1,
 		.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
 		.access = SNDRV_CTL_ELEM_ACCESS_READ,
 		.info = spdif_info,
 		.get = spdif_input_default_get,
 	},
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 		.name = SNDRV_CTL_NAME_IEC958("Loopback ", NONE, SWITCH),
 		.info = snd_ctl_boolean_mono_info,
 		.get = spdif_loopback_get,
 		.put = spdif_loopback_put,
 	},
 };

 static const struct snd_kcontrol_new ac97_controls[] = {
 	AC97_VOLUME("Mic Capture Volume", AC97_MIC),
 	AC97_SWITCH("Mic Capture Switch", AC97_MIC, 15, 1),
 	AC97_SWITCH("Mic Boost (+20dB)", AC97_MIC, 6, 0),
 	AC97_SWITCH("Line Capture Switch", AC97_LINE, 15, 1),
 	AC97_VOLUME("CD Capture Volume", AC97_CD),
 	AC97_SWITCH("CD Capture Switch", AC97_CD, 15, 1),
 	AC97_VOLUME("Aux Capture Volume", AC97_AUX),
 	AC97_SWITCH("Aux Capture Switch", AC97_AUX, 15, 1),
 };

 static void oxygen_any_ctl_free(struct snd_kcontrol *ctl)
 {
 	struct oxygen *chip = ctl->private_data;
 	unsigned int i;

 	/* I'm too lazy to write a function for each control :-) */
 	for (i = 0; i < ARRAY_SIZE(chip->controls); ++i)
 		chip->controls[i] = NULL;
 }

 static int add_controls(struct oxygen *chip,
 			const struct snd_kcontrol_new controls[],
 			unsigned int count)
 {
 	static const char *const known_ctl_names[CONTROL_COUNT] = {
 		[CONTROL_SPDIF_PCM] =
 			SNDRV_CTL_NAME_IEC958("", PLAYBACK, PCM_STREAM),
 		[CONTROL_SPDIF_INPUT_BITS] =
 			SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
 		[CONTROL_MIC_CAPTURE_SWITCH] = "Mic Capture Switch",
 		[CONTROL_LINE_CAPTURE_SWITCH] = "Line Capture Switch",
 		[CONTROL_CD_CAPTURE_SWITCH] = "CD Capture Switch",
 		[CONTROL_AUX_CAPTURE_SWITCH] = "Aux Capture Switch",
 	};
 	unsigned int i, j;
 	struct snd_kcontrol_new template;
 	struct snd_kcontrol *ctl;
 	int err;

 	for (i = 0; i < count; ++i) {
 		template = controls[i];
 		err = chip->model->control_filter(&template);
 		if (err < 0)
 			return err;
 		ctl = snd_ctl_new1(&template, chip);
 		if (!ctl)
 			return -ENOMEM;
 		err = snd_ctl_add(chip->card, ctl);
 		if (err < 0)
 			return err;
 		for (j = 0; j < CONTROL_COUNT; ++j)
 			if (!strcmp(ctl->id.name, known_ctl_names[j])) {
 				chip->controls[j] = ctl;
 				ctl->private_free = oxygen_any_ctl_free;
 			}
 	}
 	return 0;
 }

 int oxygen_mixer_init(struct oxygen *chip)
 {
 	int err;

 	err = add_controls(chip, controls, ARRAY_SIZE(controls));
 	if (err < 0)
 		return err;
 	if (chip->has_ac97_0) {
 		err = add_controls(chip, ac97_controls,
 				   ARRAY_SIZE(ac97_controls));
 		if (err < 0)
 			return err;
 	}
 	return chip->model->mixer_init ? chip->model->mixer_init(chip) : 0;
 }
	/*
	* 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)
	{
	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	info->count = 8;
	info->value.integer.min = 0;
	info->value.integer.max = 0xff;
	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 < 8; ++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 < 8; ++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[3] = {
	"Front", "Front+Surround", "Front+Surround+Back"
	};
	info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	info->count = 1;
	info->value.enumerated.items = 3;
	if (info->value.enumerated.item > 2)
	info->value.enumerated.item = 2;
	strcpy(info->value.enumerated.name, names[info->value.enumerated.item]);
	return 0;
	}

	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[3] = {
	/* stereo -> front */
	(0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) \|
	(1 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) \|
	(2 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) \|
	(3 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT),
	/* stereo -> front+surround */
	(0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) \|
	(0 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) \|
	(2 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) \|
	(3 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT),
	/* stereo -> front+surround+back */
	(0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) \|
	(0 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) \|
	(2 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) \|
	(0 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT),
	};
	u8 channels;
	unsigned int reg_value;

	channels = oxygen_read8(chip, OXYGEN_PLAY_CHANNELS) &
	OXYGEN_PLAY_CHANNELS_MASK;
	if (channels == OXYGEN_PLAY_CHANNELS_2)
	reg_value = reg_values[chip->dac_routing];
	else if (channels == OXYGEN_PLAY_CHANNELS_8)
	/* in 7.1 mode, "rear" channels go to the "back" jack */
	reg_value = (0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) \|
	(3 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) \|
	(2 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) \|
	(1 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT);
	else
	reg_value = (0 << OXYGEN_PLAY_DAC0_SOURCE_SHIFT) \|
	(1 << OXYGEN_PLAY_DAC1_SOURCE_SHIFT) \|
	(2 << OXYGEN_PLAY_DAC2_SOURCE_SHIFT) \|
	(3 << OXYGEN_PLAY_DAC3_SOURCE_SHIFT);
	oxygen_write16_masked(chip, OXYGEN_PLAY_ROUTING, reg_value,
	OXYGEN_PLAY_DAC0_SOURCE_MASK \|
	OXYGEN_PLAY_DAC1_SOURCE_MASK \|
	OXYGEN_PLAY_DAC2_SOURCE_MASK \|
	OXYGEN_PLAY_DAC3_SOURCE_MASK);
	}

	static int upmix_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.enumerated.item[0] != chip->dac_routing;
	if (changed) {
	chip->dac_routing = min(value->value.enumerated.item[0], 2u);
	spin_lock_irq(&chip->reg_lock);
	oxygen_update_dac_routing(chip);
	spin_unlock_irq(&chip->reg_lock);
	}
	mutex_unlock(&chip->mutex);
	return changed;
	}

	static int spdif_switch_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->spdif_playback_enable;
	mutex_unlock(&chip->mutex);
	return 0;
	}

	static unsigned int oxygen_spdif_rate(unsigned int oxygen_rate)
	{
	switch (oxygen_rate) {
	case OXYGEN_RATE_32000:
	return IEC958_AES3_CON_FS_32000 << OXYGEN_SPDIF_CS_RATE_SHIFT;
	case OXYGEN_RATE_44100:
	return IEC958_AES3_CON_FS_44100 << OXYGEN_SPDIF_CS_RATE_SHIFT;
	default: /* OXYGEN_RATE_48000 */
	return IEC958_AES3_CON_FS_48000 << OXYGEN_SPDIF_CS_RATE_SHIFT;
	case OXYGEN_RATE_64000:
	return 0xb << OXYGEN_SPDIF_CS_RATE_SHIFT;
	case OXYGEN_RATE_88200:
	return 0x8 << OXYGEN_SPDIF_CS_RATE_SHIFT;
	case OXYGEN_RATE_96000:
	return 0xa << OXYGEN_SPDIF_CS_RATE_SHIFT;
	case OXYGEN_RATE_176400:
	return 0xc << OXYGEN_SPDIF_CS_RATE_SHIFT;
	case OXYGEN_RATE_192000:
	return 0xe << OXYGEN_SPDIF_CS_RATE_SHIFT;
	}
	}

	void oxygen_update_spdif_source(struct oxygen *chip)
	{
	u32 old_control, new_control;
	u16 old_routing, new_routing;
	unsigned int oxygen_rate;

	old_control = oxygen_read32(chip, OXYGEN_SPDIF_CONTROL);
	old_routing = oxygen_read16(chip, OXYGEN_PLAY_ROUTING);
	if (chip->pcm_active & (1 << PCM_SPDIF)) {
	new_control = old_control \| OXYGEN_SPDIF_OUT_ENABLE;
	new_routing = (old_routing & ~OXYGEN_PLAY_SPDIF_MASK)
	\| OXYGEN_PLAY_SPDIF_SPDIF;
	oxygen_rate = (old_control >> OXYGEN_SPDIF_OUT_RATE_SHIFT)
	& OXYGEN_I2S_RATE_MASK;
	/* S/PDIF rate was already set by the caller */
	} else if ((chip->pcm_active & (1 << PCM_MULTICH)) &&
	chip->spdif_playback_enable) {
	new_routing = (old_routing & ~OXYGEN_PLAY_SPDIF_MASK)
	\| OXYGEN_PLAY_SPDIF_MULTICH_01;
	oxygen_rate = oxygen_read16(chip, OXYGEN_I2S_MULTICH_FORMAT)
	& OXYGEN_I2S_RATE_MASK;
	new_control = (old_control & ~OXYGEN_SPDIF_OUT_RATE_MASK) \|
	(oxygen_rate << OXYGEN_SPDIF_OUT_RATE_SHIFT) \|
	OXYGEN_SPDIF_OUT_ENABLE;
	} else {
	new_control = old_control & ~OXYGEN_SPDIF_OUT_ENABLE;
	new_routing = old_routing;
	oxygen_rate = OXYGEN_RATE_44100;
	}
	if (old_routing != new_routing) {
	oxygen_write32(chip, OXYGEN_SPDIF_CONTROL,
	new_control & ~OXYGEN_SPDIF_OUT_ENABLE);
	oxygen_write16(chip, OXYGEN_PLAY_ROUTING, new_routing);
	}
	if (new_control & OXYGEN_SPDIF_OUT_ENABLE)
	oxygen_write32(chip, OXYGEN_SPDIF_OUTPUT_BITS,
	oxygen_spdif_rate(oxygen_rate) \|
	((chip->pcm_active & (1 << PCM_SPDIF)) ?
	chip->spdif_pcm_bits : chip->spdif_bits));
	oxygen_write32(chip, OXYGEN_SPDIF_CONTROL, new_control);
	}

	static int spdif_switch_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->spdif_playback_enable;
	if (changed) {
	chip->spdif_playback_enable = !!value->value.integer.value[0];
	spin_lock_irq(&chip->reg_lock);
	oxygen_update_spdif_source(chip);
	spin_unlock_irq(&chip->reg_lock);
	}
	mutex_unlock(&chip->mutex);
	return changed;
	}

	static int spdif_info(struct snd_kcontrol ctl, struct snd_ctl_elem_info info)
	{
	info->type = SNDRV_CTL_ELEM_TYPE_IEC958;
	info->count = 1;
	return 0;
	}

	static void oxygen_to_iec958(u32 bits, struct snd_ctl_elem_value *value)
	{
	value->value.iec958.status[0] =
	bits & (OXYGEN_SPDIF_NONAUDIO \| OXYGEN_SPDIF_C \|
	OXYGEN_SPDIF_PREEMPHASIS);
	value->value.iec958.status[1] = /* category and original */
	bits >> OXYGEN_SPDIF_CATEGORY_SHIFT;
	}

	static u32 iec958_to_oxygen(struct snd_ctl_elem_value *value)
	{
	u32 bits;

	bits = value->value.iec958.status[0] &
	(OXYGEN_SPDIF_NONAUDIO \| OXYGEN_SPDIF_C \|
	OXYGEN_SPDIF_PREEMPHASIS);
	bits \|= value->value.iec958.status[1] << OXYGEN_SPDIF_CATEGORY_SHIFT;
	if (bits & OXYGEN_SPDIF_NONAUDIO)
	bits \|= OXYGEN_SPDIF_V;
	return bits;
	}

	static inline void write_spdif_bits(struct oxygen *chip, u32 bits)
	{
	oxygen_write32_masked(chip, OXYGEN_SPDIF_OUTPUT_BITS, bits,
	OXYGEN_SPDIF_NONAUDIO \|
	OXYGEN_SPDIF_C \|
	OXYGEN_SPDIF_PREEMPHASIS \|
	OXYGEN_SPDIF_CATEGORY_MASK \|
	OXYGEN_SPDIF_ORIGINAL \|
	OXYGEN_SPDIF_V);
	}

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

	mutex_lock(&chip->mutex);
	oxygen_to_iec958(chip->spdif_bits, value);
	mutex_unlock(&chip->mutex);
	return 0;
	}

	static int spdif_default_put(struct snd_kcontrol *ctl,
	struct snd_ctl_elem_value *value)
	{
	struct oxygen *chip = ctl->private_data;
	u32 new_bits;
	int changed;

	new_bits = iec958_to_oxygen(value);
	mutex_lock(&chip->mutex);
	changed = new_bits != chip->spdif_bits;
	if (changed) {
	chip->spdif_bits = new_bits;
	if (!(chip->pcm_active & (1 << PCM_SPDIF)))
	write_spdif_bits(chip, new_bits);
	}
	mutex_unlock(&chip->mutex);
	return changed;
	}

	static int spdif_mask_get(struct snd_kcontrol *ctl,
	struct snd_ctl_elem_value *value)
	{
	value->value.iec958.status[0] = IEC958_AES0_NONAUDIO \|
	IEC958_AES0_CON_NOT_COPYRIGHT \| IEC958_AES0_CON_EMPHASIS;
	value->value.iec958.status[1] =
	IEC958_AES1_CON_CATEGORY \| IEC958_AES1_CON_ORIGINAL;
	return 0;
	}

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

	mutex_lock(&chip->mutex);
	oxygen_to_iec958(chip->spdif_pcm_bits, value);
	mutex_unlock(&chip->mutex);
	return 0;
	}

	static int spdif_pcm_put(struct snd_kcontrol *ctl,
	struct snd_ctl_elem_value *value)
	{
	struct oxygen *chip = ctl->private_data;
	u32 new_bits;
	int changed;

	new_bits = iec958_to_oxygen(value);
	mutex_lock(&chip->mutex);
	changed = new_bits != chip->spdif_pcm_bits;
	if (changed) {
	chip->spdif_pcm_bits = new_bits;
	if (chip->pcm_active & (1 << PCM_SPDIF))
	write_spdif_bits(chip, new_bits);
	}
	mutex_unlock(&chip->mutex);
	return changed;
	}

	static int spdif_input_mask_get(struct snd_kcontrol *ctl,
	struct snd_ctl_elem_value *value)
	{
	value->value.iec958.status[0] = 0xff;
	value->value.iec958.status[1] = 0xff;
	value->value.iec958.status[2] = 0xff;
	value->value.iec958.status[3] = 0xff;
	return 0;
	}

	static int spdif_input_default_get(struct snd_kcontrol *ctl,
	struct snd_ctl_elem_value *value)
	{
	struct oxygen *chip = ctl->private_data;
	u32 bits;

	bits = oxygen_read32(chip, OXYGEN_SPDIF_INPUT_BITS);
	value->value.iec958.status[0] = bits;
	value->value.iec958.status[1] = bits >> 8;
	value->value.iec958.status[2] = bits >> 16;
	value->value.iec958.status[3] = bits >> 24;
	return 0;
	}

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

	value->value.integer.value[0] =
	!!(oxygen_read32(chip, OXYGEN_SPDIF_CONTROL)
	& OXYGEN_SPDIF_LOOPBACK);
	return 0;
	}

	static int spdif_loopback_put(struct snd_kcontrol *ctl,
	struct snd_ctl_elem_value *value)
	{
	struct oxygen *chip = ctl->private_data;
	u32 oldreg, newreg;
	int changed;

	spin_lock_irq(&chip->reg_lock);
	oldreg = oxygen_read32(chip, OXYGEN_SPDIF_CONTROL);
	if (value->value.integer.value[0])
	newreg = oldreg \| OXYGEN_SPDIF_LOOPBACK;
	else
	newreg = oldreg & ~OXYGEN_SPDIF_LOOPBACK;
	changed = newreg != oldreg;
	if (changed)
	oxygen_write32(chip, OXYGEN_SPDIF_CONTROL, newreg);
	spin_unlock_irq(&chip->reg_lock);
	return changed;
	}

	static int ac97_switch_get(struct snd_kcontrol *ctl,
	struct snd_ctl_elem_value *value)
	{
	struct oxygen *chip = ctl->private_data;
	unsigned int index = ctl->private_value & 0xff;
	unsigned int bitnr = (ctl->private_value >> 8) & 0xff;
	int invert = ctl->private_value & (1 << 16);
	u16 reg;

	mutex_lock(&chip->mutex);
	reg = oxygen_read_ac97(chip, 0, index);
	mutex_unlock(&chip->mutex);
	if (!(reg & (1 << bitnr)) ^ !invert)
	value->value.integer.value[0] = 1;
	else
	value->value.integer.value[0] = 0;
	return 0;
	}

	static void ac97_mute_ctl(struct oxygen *chip, unsigned int control)
	{
	unsigned int index = chip->controls[control]->private_value & 0xff;
	u16 value;

	value = oxygen_read_ac97(chip, 0, index);
	if (!(value & 0x8000)) {
	oxygen_write_ac97(chip, 0, index, value \| 0x8000);
	snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
	&chip->controls[control]->id);
	}
	}

	static int ac97_switch_put(struct snd_kcontrol *ctl,
	struct snd_ctl_elem_value *value)
	{
	struct oxygen *chip = ctl->private_data;
	unsigned int index = ctl->private_value & 0xff;
	unsigned int bitnr = (ctl->private_value >> 8) & 0xff;
	int invert = ctl->private_value & (1 << 16);
	u16 oldreg, newreg;
	int change;

	mutex_lock(&chip->mutex);
	oldreg = oxygen_read_ac97(chip, 0, index);
	newreg = oldreg;
	if (!value->value.integer.value[0] ^ !invert)
	newreg \|= 1 << bitnr;
	else
	newreg &= ~(1 << bitnr);
	change = newreg != oldreg;
	if (change) {
	oxygen_write_ac97(chip, 0, index, newreg);
	if (index == AC97_LINE) {
	oxygen_write_ac97_masked(chip, 0, CM9780_GPIO_STATUS,
	newreg & 0x8000 ?
	CM9780_GPO0 : 0, CM9780_GPO0);
	if (!(newreg & 0x8000)) {
	ac97_mute_ctl(chip, CONTROL_MIC_CAPTURE_SWITCH);
	ac97_mute_ctl(chip, CONTROL_CD_CAPTURE_SWITCH);
	ac97_mute_ctl(chip, CONTROL_AUX_CAPTURE_SWITCH);
	}
	} else if ((index == AC97_MIC \|\| index == AC97_CD \|\|
	index == AC97_VIDEO \|\| index == AC97_AUX) &&
	bitnr == 15 && !(newreg & 0x8000)) {
	ac97_mute_ctl(chip, CONTROL_LINE_CAPTURE_SWITCH);
	oxygen_write_ac97_masked(chip, 0, CM9780_GPIO_STATUS,
	CM9780_GPO0, CM9780_GPO0);
	}
	}
	mutex_unlock(&chip->mutex);
	return change;
	}

	static int ac97_volume_info(struct snd_kcontrol *ctl,
	struct snd_ctl_elem_info *info)
	{
	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	info->count = 2;
	info->value.integer.min = 0;
	info->value.integer.max = 0x1f;
	return 0;
	}

	static int ac97_volume_get(struct snd_kcontrol *ctl,
	struct snd_ctl_elem_value *value)
	{
	struct oxygen *chip = ctl->private_data;
	unsigned int index = ctl->private_value;
	u16 reg;

	mutex_lock(&chip->mutex);
	reg = oxygen_read_ac97(chip, 0, index);
	mutex_unlock(&chip->mutex);
	value->value.integer.value[0] = 31 - (reg & 0x1f);
	value->value.integer.value[1] = 31 - ((reg >> 8) & 0x1f);
	return 0;
	}

	static int ac97_volume_put(struct snd_kcontrol *ctl,
	struct snd_ctl_elem_value *value)
	{
	struct oxygen *chip = ctl->private_data;
	unsigned int index = ctl->private_value;
	u16 oldreg, newreg;
	int change;

	mutex_lock(&chip->mutex);
	oldreg = oxygen_read_ac97(chip, 0, index);
	newreg = oldreg;
	newreg = (newreg & ~0x1f) \|
	(31 - (value->value.integer.value[0] & 0x1f));
	newreg = (newreg & ~0x1f00) \|
	((31 - (value->value.integer.value[0] & 0x1f)) << 8);
	change = newreg != oldreg;
	if (change)
	oxygen_write_ac97(chip, 0, index, newreg);
	mutex_unlock(&chip->mutex);
	return change;
	}

	#define AC97_SWITCH(xname, index, bitnr, invert) { \
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
	.name = xname, \
	.info = snd_ctl_boolean_mono_info, \
	.get = ac97_switch_get, \
	.put = ac97_switch_put, \
	.private_value = ((invert) << 16) \| ((bitnr) << 8) \| (index), \
	}
	#define AC97_VOLUME(xname, index) { \
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
	.name = xname, \
	.info = ac97_volume_info, \
	.get = ac97_volume_get, \
	.put = ac97_volume_put, \
	.tlv = { .p = ac97_db_scale, }, \
	.private_value = (index), \
	}

	static DECLARE_TLV_DB_SCALE(ac97_db_scale, -3450, 150, 0);

	static const struct snd_kcontrol_new controls[] = {
	{
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Master Playback Volume",
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.info = dac_volume_info,
	.get = dac_volume_get,
	.put = dac_volume_put,
	},
	{
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Master Playback Switch",
	.info = snd_ctl_boolean_mono_info,
	.get = dac_mute_get,
	.put = dac_mute_put,
	},
	{
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Stereo Upmixing",
	.info = upmix_info,
	.get = upmix_get,
	.put = upmix_put,
	},
	{
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, SWITCH),
	.info = snd_ctl_boolean_mono_info,
	.get = spdif_switch_get,
	.put = spdif_switch_put,
	},
	{
	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
	.device = 1,
	.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
	.info = spdif_info,
	.get = spdif_default_get,
	.put = spdif_default_put,
	},
	{
	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
	.device = 1,
	.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, CON_MASK),
	.access = SNDRV_CTL_ELEM_ACCESS_READ,
	.info = spdif_info,
	.get = spdif_mask_get,
	},
	{
	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
	.device = 1,
	.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, PCM_STREAM),
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE \|
	SNDRV_CTL_ELEM_ACCESS_INACTIVE,
	.info = spdif_info,
	.get = spdif_pcm_get,
	.put = spdif_pcm_put,
	},
	{
	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
	.device = 1,
	.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, MASK),
	.access = SNDRV_CTL_ELEM_ACCESS_READ,
	.info = spdif_info,
	.get = spdif_input_mask_get,
	},
	{
	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
	.device = 1,
	.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
	.access = SNDRV_CTL_ELEM_ACCESS_READ,
	.info = spdif_info,
	.get = spdif_input_default_get,
	},
	{
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = SNDRV_CTL_NAME_IEC958("Loopback ", NONE, SWITCH),
	.info = snd_ctl_boolean_mono_info,
	.get = spdif_loopback_get,
	.put = spdif_loopback_put,
	},
	};

	static const struct snd_kcontrol_new ac97_controls[] = {
	AC97_VOLUME("Mic Capture Volume", AC97_MIC),
	AC97_SWITCH("Mic Capture Switch", AC97_MIC, 15, 1),
	AC97_SWITCH("Mic Boost (+20dB)", AC97_MIC, 6, 0),
	AC97_SWITCH("Line Capture Switch", AC97_LINE, 15, 1),
	AC97_VOLUME("CD Capture Volume", AC97_CD),
	AC97_SWITCH("CD Capture Switch", AC97_CD, 15, 1),
	AC97_VOLUME("Aux Capture Volume", AC97_AUX),
	AC97_SWITCH("Aux Capture Switch", AC97_AUX, 15, 1),
	};

	static void oxygen_any_ctl_free(struct snd_kcontrol *ctl)
	{
	struct oxygen *chip = ctl->private_data;
	unsigned int i;

	/* I'm too lazy to write a function for each control :-) */
	for (i = 0; i < ARRAY_SIZE(chip->controls); ++i)
	chip->controls[i] = NULL;
	}

	static int add_controls(struct oxygen *chip,
	const struct snd_kcontrol_new controls[],
	unsigned int count)
	{
	static const char *const known_ctl_names[CONTROL_COUNT] = {
	[CONTROL_SPDIF_PCM] =
	SNDRV_CTL_NAME_IEC958("", PLAYBACK, PCM_STREAM),
	[CONTROL_SPDIF_INPUT_BITS] =
	SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
	[CONTROL_MIC_CAPTURE_SWITCH] = "Mic Capture Switch",
	[CONTROL_LINE_CAPTURE_SWITCH] = "Line Capture Switch",
	[CONTROL_CD_CAPTURE_SWITCH] = "CD Capture Switch",
	[CONTROL_AUX_CAPTURE_SWITCH] = "Aux Capture Switch",
	};
	unsigned int i, j;
	struct snd_kcontrol_new template;
	struct snd_kcontrol *ctl;
	int err;

	for (i = 0; i < count; ++i) {
	template = controls[i];
	err = chip->model->control_filter(&template);
	if (err < 0)
	return err;
	ctl = snd_ctl_new1(&template, chip);
	if (!ctl)
	return -ENOMEM;
	err = snd_ctl_add(chip->card, ctl);
	if (err < 0)
	return err;
	for (j = 0; j < CONTROL_COUNT; ++j)
	if (!strcmp(ctl->id.name, known_ctl_names[j])) {
	chip->controls[j] = ctl;
	ctl->private_free = oxygen_any_ctl_free;
	}
	}
	return 0;
	}

	int oxygen_mixer_init(struct oxygen *chip)
	{
	int err;

	err = add_controls(chip, controls, ARRAY_SIZE(controls));
	if (err < 0)
	return err;
	if (chip->has_ac97_0) {
	err = add_controls(chip, ac97_controls,
	ARRAY_SIZE(ac97_controls));
	if (err < 0)
	return err;
	}
	return chip->model->mixer_init ? chip->model->mixer_init(chip) : 0;
	}