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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 = 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 < 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[3] = {
            "Front", "Front+Surround", "Front+Surround+Back"
      };
      struct oxygen *chip = ctl->private_data;
      unsigned int count = 2 + (chip->model->dac_channels == 8);

      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.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;
      unsigned int count = 2 + (chip->model->dac_channels == 8);
      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],
                              count - 1);
            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 codec = (ctl->private_value >> 24) & 1;
      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, codec, 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 int ac97_switch_put(struct snd_kcontrol *ctl,
                     struct snd_ctl_elem_value *value)
{
      struct oxygen *chip = ctl->private_data;
      unsigned int codec = (ctl->private_value >> 24) & 1;
      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, codec, 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, codec, index, newreg);
            if (bitnr == 15 && chip->model->ac97_switch_hook)
                  chip->model->ac97_switch_hook(chip, codec, index,
                                          newreg & 0x8000);
      }
      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 codec = (ctl->private_value >> 24) & 1;
      unsigned int index = ctl->private_value & 0xff;
      u16 reg;

      mutex_lock(&chip->mutex);
      reg = oxygen_read_ac97(chip, codec, 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 codec = (ctl->private_value >> 24) & 1;
      unsigned int index = ctl->private_value & 0xff;
      u16 oldreg, newreg;
      int change;

      mutex_lock(&chip->mutex);
      oldreg = oxygen_read_ac97(chip, codec, 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, codec, index, newreg);
      mutex_unlock(&chip->mutex);
      return change;
}

static int ac97_fp_rec_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 = 7;
      return 0;
}

static int ac97_fp_rec_volume_get(struct snd_kcontrol *ctl,
                          struct snd_ctl_elem_value *value)
{
      struct oxygen *chip = ctl->private_data;
      u16 reg;

      mutex_lock(&chip->mutex);
      reg = oxygen_read_ac97(chip, 1, AC97_REC_GAIN);
      mutex_unlock(&chip->mutex);
      value->value.integer.value[0] = reg & 7;
      value->value.integer.value[1] = (reg >> 8) & 7;
      return 0;
}

static int ac97_fp_rec_volume_put(struct snd_kcontrol *ctl,
                          struct snd_ctl_elem_value *value)
{
      struct oxygen *chip = ctl->private_data;
      u16 oldreg, newreg;
      int change;

      mutex_lock(&chip->mutex);
      oldreg = oxygen_read_ac97(chip, 1, AC97_REC_GAIN);
      newreg = oldreg & ~0x0707;
      newreg = newreg | (value->value.integer.value[0] & 7);
      newreg = newreg | ((value->value.integer.value[0] & 7) << 8);
      change = newreg != oldreg;
      if (change)
            oxygen_write_ac97(chip, 1, AC97_REC_GAIN, newreg);
      mutex_unlock(&chip->mutex);
      return change;
}

#define AC97_SWITCH(xname, codec, 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 = ((codec) << 24) | ((invert) << 16) | \
                         ((bitnr) << 8) | (index), \
      }
#define AC97_VOLUME(xname, codec, index) { \
            .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
            .name = xname, \
            .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | \
                    SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
            .info = ac97_volume_info, \
            .get = ac97_volume_get, \
            .put = ac97_volume_put, \
            .tlv = { .p = ac97_db_scale, }, \
            .private_value = ((codec) << 24) | (index), \
      }

static DECLARE_TLV_DB_SCALE(ac97_db_scale, -3450, 150, 0);
static DECLARE_TLV_DB_SCALE(ac97_rec_db_scale, 0, 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", 0, AC97_MIC),
      AC97_SWITCH("Mic Capture Switch", 0, AC97_MIC, 15, 1),
      AC97_SWITCH("Mic Boost (+20dB)", 0, AC97_MIC, 6, 0),
      AC97_VOLUME("Line Capture Volume", 0, AC97_LINE),
      AC97_SWITCH("Line Capture Switch", 0, AC97_LINE, 15, 1),
      AC97_VOLUME("CD Capture Volume", 0, AC97_CD),
      AC97_SWITCH("CD Capture Switch", 0, AC97_CD, 15, 1),
      AC97_VOLUME("Aux Capture Volume", 0, AC97_AUX),
      AC97_SWITCH("Aux Capture Switch", 0, AC97_AUX, 15, 1),
};

static const struct snd_kcontrol_new ac97_fp_controls[] = {
      AC97_VOLUME("Front Panel Playback Volume", 1, AC97_HEADPHONE),
      AC97_SWITCH("Front Panel Playback Switch", 1, AC97_HEADPHONE, 15, 1),
      {
            .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
            .name = "Front Panel Capture Volume",
            .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
                    SNDRV_CTL_ELEM_ACCESS_TLV_READ,
            .info = ac97_fp_rec_volume_info,
            .get = ac97_fp_rec_volume_get,
            .put = ac97_fp_rec_volume_put,
            .tlv = { .p = ac97_rec_db_scale, },
      },
      AC97_SWITCH("Front Panel Capture Switch", 1, AC97_REC_GAIN, 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;
            if (err == 1)
                  continue;
            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;
      }
      if (chip->has_ac97_1) {
            err = add_controls(chip, ac97_fp_controls,
                           ARRAY_SIZE(ac97_fp_controls));
            if (err < 0)
                  return err;
      }
      return chip->model->mixer_init ? chip->model->mixer_init(chip) : 0;
}

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