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emumixer.c

/*
 *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>,
 *                   Takashi Iwai <tiwai@suse.de>
 *                   Creative Labs, Inc.
 *  Routines for control of EMU10K1 chips / mixer routines
 *
 *  BUGS:
 *    --
 *
 *  TODO:
 *    --
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program 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 program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <sound/driver.h>
#include <linux/time.h>
#include <linux/init.h>
#include <sound/core.h>
#include <sound/emu10k1.h>

#define AC97_ID_STAC9758      0x83847658

static int snd_emu10k1_spdif_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
      uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
      uinfo->count = 1;
      return 0;
}

static int snd_emu10k1_spdif_get(snd_kcontrol_t * kcontrol,
                                 snd_ctl_elem_value_t * ucontrol)
{
      emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
      unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
      unsigned long flags;

      spin_lock_irqsave(&emu->reg_lock, flags);
      ucontrol->value.iec958.status[0] = (emu->spdif_bits[idx] >> 0) & 0xff;
      ucontrol->value.iec958.status[1] = (emu->spdif_bits[idx] >> 8) & 0xff;
      ucontrol->value.iec958.status[2] = (emu->spdif_bits[idx] >> 16) & 0xff;
      ucontrol->value.iec958.status[3] = (emu->spdif_bits[idx] >> 24) & 0xff;
      spin_unlock_irqrestore(&emu->reg_lock, flags);
      return 0;
}

static int snd_emu10k1_spdif_get_mask(snd_kcontrol_t * kcontrol,
                              snd_ctl_elem_value_t * ucontrol)
{
      ucontrol->value.iec958.status[0] = 0xff;
      ucontrol->value.iec958.status[1] = 0xff;
      ucontrol->value.iec958.status[2] = 0xff;
      ucontrol->value.iec958.status[3] = 0xff;
      return 0;
}

static int snd_emu10k1_spdif_put(snd_kcontrol_t * kcontrol,
                                 snd_ctl_elem_value_t * ucontrol)
{
      emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
      unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
      int change;
      unsigned int val;
      unsigned long flags;

      val = (ucontrol->value.iec958.status[0] << 0) |
            (ucontrol->value.iec958.status[1] << 8) |
            (ucontrol->value.iec958.status[2] << 16) |
            (ucontrol->value.iec958.status[3] << 24);
      spin_lock_irqsave(&emu->reg_lock, flags);
      change = val != emu->spdif_bits[idx];
      if (change) {
            snd_emu10k1_ptr_write(emu, SPCS0 + idx, 0, val);
            emu->spdif_bits[idx] = val;
      }
      spin_unlock_irqrestore(&emu->reg_lock, flags);
      return change;
}

static snd_kcontrol_new_t snd_emu10k1_spdif_mask_control =
{
      .access =   SNDRV_CTL_ELEM_ACCESS_READ,
      .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
      .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
      .count =    4,
      .info =         snd_emu10k1_spdif_info,
      .get =          snd_emu10k1_spdif_get_mask
};

static snd_kcontrol_new_t snd_emu10k1_spdif_control =
{
      .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
      .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
      .count =    4,
      .info =         snd_emu10k1_spdif_info,
      .get =          snd_emu10k1_spdif_get,
      .put =          snd_emu10k1_spdif_put
};


static void update_emu10k1_fxrt(emu10k1_t *emu, int voice, unsigned char *route)
{
      if (emu->audigy) {
            snd_emu10k1_ptr_write(emu, A_FXRT1, voice,
                              snd_emu10k1_compose_audigy_fxrt1(route));
            snd_emu10k1_ptr_write(emu, A_FXRT2, voice,
                              snd_emu10k1_compose_audigy_fxrt2(route));
      } else {
            snd_emu10k1_ptr_write(emu, FXRT, voice,
                              snd_emu10k1_compose_send_routing(route));
      }
}

static void update_emu10k1_send_volume(emu10k1_t *emu, int voice, unsigned char *volume)
{
      snd_emu10k1_ptr_write(emu, PTRX_FXSENDAMOUNT_A, voice, volume[0]);
      snd_emu10k1_ptr_write(emu, PTRX_FXSENDAMOUNT_B, voice, volume[1]);
      snd_emu10k1_ptr_write(emu, PSST_FXSENDAMOUNT_C, voice, volume[2]);
      snd_emu10k1_ptr_write(emu, DSL_FXSENDAMOUNT_D, voice, volume[3]);
      if (emu->audigy) {
            unsigned int val = ((unsigned int)volume[4] << 24) |
                  ((unsigned int)volume[5] << 16) |
                  ((unsigned int)volume[6] << 8) |
                  (unsigned int)volume[7];
            snd_emu10k1_ptr_write(emu, A_SENDAMOUNTS, voice, val);
      }
}

static int snd_emu10k1_send_routing_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
      emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
      uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
      uinfo->count = emu->audigy ? 3*8 : 3*4;
      uinfo->value.integer.min = 0;
      uinfo->value.integer.max = emu->audigy ? 0x3f : 0x0f;
      return 0;
}

static int snd_emu10k1_send_routing_get(snd_kcontrol_t * kcontrol,
                                        snd_ctl_elem_value_t * ucontrol)
{
      unsigned long flags;
      emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
      emu10k1_pcm_mixer_t *mix = &emu->pcm_mixer[snd_ctl_get_ioffidx(kcontrol, &ucontrol->id)];
      int voice, idx;
      int num_efx = emu->audigy ? 8 : 4;
      int mask = emu->audigy ? 0x3f : 0x0f;

      spin_lock_irqsave(&emu->reg_lock, flags);
      for (voice = 0; voice < 3; voice++)
            for (idx = 0; idx < num_efx; idx++)
                  ucontrol->value.integer.value[(voice * num_efx) + idx] = 
                        mix->send_routing[voice][idx] & mask;
      spin_unlock_irqrestore(&emu->reg_lock, flags);
      return 0;
}

static int snd_emu10k1_send_routing_put(snd_kcontrol_t * kcontrol,
                                        snd_ctl_elem_value_t * ucontrol)
{
      unsigned long flags;
      emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
      emu10k1_pcm_mixer_t *mix = &emu->pcm_mixer[snd_ctl_get_ioffidx(kcontrol, &ucontrol->id)];
      int change = 0, voice, idx, val;
      int num_efx = emu->audigy ? 8 : 4;
      int mask = emu->audigy ? 0x3f : 0x0f;

      spin_lock_irqsave(&emu->reg_lock, flags);
      for (voice = 0; voice < 3; voice++)
            for (idx = 0; idx < num_efx; idx++) {
                  val = ucontrol->value.integer.value[(voice * num_efx) + idx] & mask;
                  if (mix->send_routing[voice][idx] != val) {
                        mix->send_routing[voice][idx] = val;
                        change = 1;
                  }
            }     
      if (change && mix->epcm) {
            if (mix->epcm->voices[0] && mix->epcm->voices[1]) {
                  update_emu10k1_fxrt(emu, mix->epcm->voices[0]->number,
                                  &mix->send_routing[1][0]);
                  update_emu10k1_fxrt(emu, mix->epcm->voices[1]->number,
                                  &mix->send_routing[2][0]);
            } else if (mix->epcm->voices[0]) {
                  update_emu10k1_fxrt(emu, mix->epcm->voices[0]->number,
                                  &mix->send_routing[0][0]);
            }
      }
      spin_unlock_irqrestore(&emu->reg_lock, flags);
      return change;
}

static snd_kcontrol_new_t snd_emu10k1_send_routing_control =
{
      .access =   SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
      .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
      .name =         "EMU10K1 PCM Send Routing",
      .count =    32,
      .info =         snd_emu10k1_send_routing_info,
      .get =          snd_emu10k1_send_routing_get,
      .put =          snd_emu10k1_send_routing_put
};

static int snd_emu10k1_send_volume_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
      emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
      uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
      uinfo->count = emu->audigy ? 3*8 : 3*4;
      uinfo->value.integer.min = 0;
      uinfo->value.integer.max = 255;
      return 0;
}

static int snd_emu10k1_send_volume_get(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
      unsigned long flags;
      emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
      emu10k1_pcm_mixer_t *mix = &emu->pcm_mixer[snd_ctl_get_ioffidx(kcontrol, &ucontrol->id)];
      int idx;
      int num_efx = emu->audigy ? 8 : 4;

      spin_lock_irqsave(&emu->reg_lock, flags);
      for (idx = 0; idx < 3*num_efx; idx++)
            ucontrol->value.integer.value[idx] = mix->send_volume[idx/num_efx][idx%num_efx];
      spin_unlock_irqrestore(&emu->reg_lock, flags);
      return 0;
}

static int snd_emu10k1_send_volume_put(snd_kcontrol_t * kcontrol,
                                       snd_ctl_elem_value_t * ucontrol)
{
      unsigned long flags;
      emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
      emu10k1_pcm_mixer_t *mix = &emu->pcm_mixer[snd_ctl_get_ioffidx(kcontrol, &ucontrol->id)];
      int change = 0, idx, val;
      int num_efx = emu->audigy ? 8 : 4;

      spin_lock_irqsave(&emu->reg_lock, flags);
      for (idx = 0; idx < 3*num_efx; idx++) {
            val = ucontrol->value.integer.value[idx] & 255;
            if (mix->send_volume[idx/num_efx][idx%num_efx] != val) {
                  mix->send_volume[idx/num_efx][idx%num_efx] = val;
                  change = 1;
            }
      }
      if (change && mix->epcm) {
            if (mix->epcm->voices[0] && mix->epcm->voices[1]) {
                  update_emu10k1_send_volume(emu, mix->epcm->voices[0]->number,
                                       &mix->send_volume[1][0]);
                  update_emu10k1_send_volume(emu, mix->epcm->voices[1]->number,
                                       &mix->send_volume[2][0]);
            } else if (mix->epcm->voices[0]) {
                  update_emu10k1_send_volume(emu, mix->epcm->voices[0]->number,
                                       &mix->send_volume[0][0]);
            }
      }
      spin_unlock_irqrestore(&emu->reg_lock, flags);
      return change;
}

static snd_kcontrol_new_t snd_emu10k1_send_volume_control =
{
      .access =   SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
      .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
      .name =         "EMU10K1 PCM Send Volume",
      .count =    32,
      .info =         snd_emu10k1_send_volume_info,
      .get =          snd_emu10k1_send_volume_get,
      .put =          snd_emu10k1_send_volume_put
};

static int snd_emu10k1_attn_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
      uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
      uinfo->count = 3;
      uinfo->value.integer.min = 0;
      uinfo->value.integer.max = 0xffff;
      return 0;
}

static int snd_emu10k1_attn_get(snd_kcontrol_t * kcontrol,
                                snd_ctl_elem_value_t * ucontrol)
{
      emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
      emu10k1_pcm_mixer_t *mix = &emu->pcm_mixer[snd_ctl_get_ioffidx(kcontrol, &ucontrol->id)];
      unsigned long flags;
      int idx;

      spin_lock_irqsave(&emu->reg_lock, flags);
      for (idx = 0; idx < 3; idx++)
            ucontrol->value.integer.value[idx] = mix->attn[idx];
      spin_unlock_irqrestore(&emu->reg_lock, flags);
      return 0;
}

static int snd_emu10k1_attn_put(snd_kcontrol_t * kcontrol,
                        snd_ctl_elem_value_t * ucontrol)
{
      unsigned long flags;
      emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
      emu10k1_pcm_mixer_t *mix = &emu->pcm_mixer[snd_ctl_get_ioffidx(kcontrol, &ucontrol->id)];
      int change = 0, idx, val;

      spin_lock_irqsave(&emu->reg_lock, flags);
      for (idx = 0; idx < 3; idx++) {
            val = ucontrol->value.integer.value[idx] & 0xffff;
            if (mix->attn[idx] != val) {
                  mix->attn[idx] = val;
                  change = 1;
            }
      }
      if (change && mix->epcm) {
            if (mix->epcm->voices[0] && mix->epcm->voices[1]) {
                  snd_emu10k1_ptr_write(emu, VTFT_VOLUMETARGET, mix->epcm->voices[0]->number, mix->attn[1]);
                  snd_emu10k1_ptr_write(emu, VTFT_VOLUMETARGET, mix->epcm->voices[1]->number, mix->attn[2]);
            } else if (mix->epcm->voices[0]) {
                  snd_emu10k1_ptr_write(emu, VTFT_VOLUMETARGET, mix->epcm->voices[0]->number, mix->attn[0]);
            }
      }
      spin_unlock_irqrestore(&emu->reg_lock, flags);
      return change;
}

static snd_kcontrol_new_t snd_emu10k1_attn_control =
{
      .access =   SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
      .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
      .name =         "EMU10K1 PCM Volume",
      .count =    32,
      .info =         snd_emu10k1_attn_info,
      .get =          snd_emu10k1_attn_get,
      .put =          snd_emu10k1_attn_put
};

static int snd_emu10k1_shared_spdif_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
      uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
      uinfo->count = 1;
      uinfo->value.integer.min = 0;
      uinfo->value.integer.max = 1;
      return 0;
}

static int snd_emu10k1_shared_spdif_get(snd_kcontrol_t * kcontrol,
                              snd_ctl_elem_value_t * ucontrol)
{
      emu10k1_t *emu = snd_kcontrol_chip(kcontrol);

      if (emu->audigy)
            ucontrol->value.integer.value[0] = inl(emu->port + A_IOCFG) & A_IOCFG_GPOUT0 ? 1 : 0;
      else
            ucontrol->value.integer.value[0] = inl(emu->port + HCFG) & HCFG_GPOUT0 ? 1 : 0;
      return 0;
}

static int snd_emu10k1_shared_spdif_put(snd_kcontrol_t * kcontrol,
                              snd_ctl_elem_value_t * ucontrol)
{
      unsigned long flags;
      emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
      unsigned int reg, val;
      int change = 0;

      spin_lock_irqsave(&emu->reg_lock, flags);
      if (emu->audigy) {
            reg = inl(emu->port + A_IOCFG);
            val = ucontrol->value.integer.value[0] ? A_IOCFG_GPOUT0 : 0;
            change = (reg & A_IOCFG_GPOUT0) != val;
            if (change) {
                  reg &= ~A_IOCFG_GPOUT0;
                  reg |= val;
                  outl(reg | val, emu->port + A_IOCFG);
            }
      }
      reg = inl(emu->port + HCFG);
      val = ucontrol->value.integer.value[0] ? HCFG_GPOUT0 : 0;
      change |= (reg & HCFG_GPOUT0) != val;
      if (change) {
            reg &= ~HCFG_GPOUT0;
            reg |= val;
            outl(reg | val, emu->port + HCFG);
      }
      spin_unlock_irqrestore(&emu->reg_lock, flags);
      return change;
}

static snd_kcontrol_new_t snd_emu10k1_shared_spdif __devinitdata =
{
      .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
      .name =           "SB Live Analog/Digital Output Jack",
      .info =           snd_emu10k1_shared_spdif_info,
      .get =            snd_emu10k1_shared_spdif_get,
      .put =            snd_emu10k1_shared_spdif_put
};

static snd_kcontrol_new_t snd_audigy_shared_spdif __devinitdata =
{
      .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
      .name =           "Audigy Analog/Digital Output Jack",
      .info =           snd_emu10k1_shared_spdif_info,
      .get =            snd_emu10k1_shared_spdif_get,
      .put =            snd_emu10k1_shared_spdif_put
};

/*
 */
static void snd_emu10k1_mixer_free_ac97(ac97_t *ac97)
{
      emu10k1_t *emu = ac97->private_data;
      emu->ac97 = NULL;
}

/*
 */
static int remove_ctl(snd_card_t *card, const char *name)
{
      snd_ctl_elem_id_t id;
      memset(&id, 0, sizeof(id));
      strcpy(id.name, name);
      id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
      return snd_ctl_remove_id(card, &id);
}

static snd_kcontrol_t *ctl_find(snd_card_t *card, const char *name)
{
      snd_ctl_elem_id_t sid;
      memset(&sid, 0, sizeof(sid));
      strcpy(sid.name, name);
      sid.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
      return snd_ctl_find_id(card, &sid);
}

static int rename_ctl(snd_card_t *card, const char *src, const char *dst)
{
      snd_kcontrol_t *kctl = ctl_find(card, src);
      if (kctl) {
            strcpy(kctl->id.name, dst);
            return 0;
      }
      return -ENOENT;
}

int __devinit snd_emu10k1_mixer(emu10k1_t *emu)
{
      int err, pcm;
      snd_kcontrol_t *kctl;
      snd_card_t *card = emu->card;
      char **c;
      static char *emu10k1_remove_ctls[] = {
            /* no AC97 mono, surround, center/lfe */
            "Master Mono Playback Switch",
            "Master Mono Playback Volume",
            "PCM Out Path & Mute",
            "Mono Output Select",
            "Surround Playback Switch",
            "Surround Playback Volume",
            "Center Playback Switch",
            "Center Playback Volume",
            "LFE Playback Switch",
            "LFE Playback Volume",
            NULL
      };
      static char *emu10k1_rename_ctls[] = {
            "Surround Digital Playback Volume", "Surround Playback Volume",
            "Center Digital Playback Volume", "Center Playback Volume",
            "LFE Digital Playback Volume", "LFE Playback Volume",
            NULL
      };
      static char *audigy_remove_ctls[] = {
            /* Master/PCM controls on ac97 of Audigy has no effect */
            "PCM Playback Switch",
            "PCM Playback Volume",
            "Master Mono Playback Switch",
            "Master Mono Playback Volume",
            "Master Playback Switch",
            "Master Playback Volume",
            "PCM Out Path & Mute",
            "Mono Output Select",
            /* remove unused AC97 capture controls */
            "Capture Source",
            "Capture Switch",
            "Capture Volume",
            "Mic Select",
            "Video Playback Switch",
            "Video Playback Volume",
            "Mic Playback Switch",
            "Mic Playback Volume",
            NULL
      };
      static char *audigy_rename_ctls[] = {
            /* use conventional names */
            "Wave Playback Volume", "PCM Playback Volume",
            /* "Wave Capture Volume", "PCM Capture Volume", */
            "Wave Master Playback Volume", "Master Playback Volume",
            "AMic Playback Volume", "Mic Playback Volume",
            NULL
      };

      if (!emu->no_ac97) {
            ac97_bus_t *pbus;
            ac97_template_t ac97;
            static ac97_bus_ops_t ops = {
                  .write = snd_emu10k1_ac97_write,
                  .read = snd_emu10k1_ac97_read,
            };

            if ((err = snd_ac97_bus(emu->card, 0, &ops, NULL, &pbus)) < 0)
                  return err;
            pbus->no_vra = 1; /* we don't need VRA */
            
            memset(&ac97, 0, sizeof(ac97));
            ac97.private_data = emu;
            ac97.private_free = snd_emu10k1_mixer_free_ac97;
            if ((err = snd_ac97_mixer(pbus, &ac97, &emu->ac97)) < 0)
                  return err;
            if (emu->audigy) {
                  /* set master volume to 0 dB */
                  snd_ac97_write(emu->ac97, AC97_MASTER, 0x0000);
                  /* set capture source to mic */
                  snd_ac97_write(emu->ac97, AC97_REC_SEL, 0x0000);
                  c = audigy_remove_ctls;
            } else {
                  /*
                   * Credits for cards based on STAC9758:
                   *   James Courtier-Dutton <James@superbug.demon.co.uk>
                   *   Voluspa <voluspa@comhem.se>
                   */
                  if (emu->ac97->id == AC97_ID_STAC9758) {
                        emu->rear_ac97 = 1;
                        snd_emu10k1_ptr_write(emu, AC97SLOT, 0, AC97SLOT_CNTR|AC97SLOT_LFE|AC97SLOT_REAR_LEFT|AC97SLOT_REAR_RIGHT);
                  }
                  /* remove unused AC97 controls */
                  snd_ac97_write(emu->ac97, AC97_SURROUND_MASTER, 0x0202);
                  snd_ac97_write(emu->ac97, AC97_CENTER_LFE_MASTER, 0x0202);
                  c = emu10k1_remove_ctls;
            }
            for (; *c; c++)
                  remove_ctl(card, *c);
      } else {
            if (emu->APS)
                  strcpy(emu->card->mixername, "EMU APS");
            else if (emu->audigy)
                  strcpy(emu->card->mixername, "SB Audigy");
            else
                  strcpy(emu->card->mixername, "Emu10k1");
      }

      if (emu->audigy)
            c = audigy_rename_ctls;
      else
            c = emu10k1_rename_ctls;
      for (; *c; c += 2)
            rename_ctl(card, c[0], c[1]);

      if ((kctl = emu->ctl_send_routing = snd_ctl_new1(&snd_emu10k1_send_routing_control, emu)) == NULL)
            return -ENOMEM;
      if ((err = snd_ctl_add(card, kctl)))
            return err;
      if ((kctl = emu->ctl_send_volume = snd_ctl_new1(&snd_emu10k1_send_volume_control, emu)) == NULL)
            return -ENOMEM;
      if ((err = snd_ctl_add(card, kctl)))
            return err;
      if ((kctl = emu->ctl_attn = snd_ctl_new1(&snd_emu10k1_attn_control, emu)) == NULL)
            return -ENOMEM;
      if ((err = snd_ctl_add(card, kctl)))
            return err;

      /* intiailize the routing and volume table for each pcm playback stream */
      for (pcm = 0; pcm < 32; pcm++) {
            emu10k1_pcm_mixer_t *mix;
            int v;
            
            mix = &emu->pcm_mixer[pcm];
            mix->epcm = NULL;

            for (v = 0; v < 4; v++)
                  mix->send_routing[0][v] = 
                        mix->send_routing[1][v] = 
                        mix->send_routing[2][v] = v;
            
            memset(&mix->send_volume, 0, sizeof(mix->send_volume));
            mix->send_volume[0][0] = mix->send_volume[0][1] =
            mix->send_volume[1][0] = mix->send_volume[2][1] = 255;
            
            mix->attn[0] = mix->attn[1] = mix->attn[2] = 0xffff;
      }
      
      if (! emu->APS) { /* FIXME: APS has these controls? */
            /* sb live! and audigy */
            if ((kctl = snd_ctl_new1(&snd_emu10k1_spdif_mask_control, emu)) == NULL)
                  return -ENOMEM;
            if ((err = snd_ctl_add(card, kctl)))
                  return err;
            if ((kctl = ctl_find(card, SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT))) != NULL) {
                  /* already defined by ac97, remove it */
                  /* FIXME: or do we need both controls? */
                  remove_ctl(card, SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT));
            }
            if ((kctl = snd_ctl_new1(&snd_emu10k1_spdif_control, emu)) == NULL)
                  return -ENOMEM;
            if ((err = snd_ctl_add(card, kctl)))
                  return err;
      }

      if (emu->audigy) {
            if ((kctl = snd_ctl_new1(&snd_audigy_shared_spdif, emu)) == NULL)
                  return -ENOMEM;
            if ((err = snd_ctl_add(card, kctl)))
                  return err;
      } else if (! emu->APS) {
            /* sb live! */
            if ((kctl = snd_ctl_new1(&snd_emu10k1_shared_spdif, emu)) == NULL)
                  return -ENOMEM;
            if ((err = snd_ctl_add(card, kctl)))
                  return err;
      }

      return 0;
}

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