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pcxhr_mixer.c

#define __NO_VERSION__
/*
 * Driver for Digigram pcxhr compatible soundcards
 *
 * mixer callbacks
 *
 * Copyright (c) 2004 by Digigram <alsa@digigram.com>
 *
 *   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/interrupt.h>
#include <linux/init.h>
#include <linux/mutex.h>
#include <sound/core.h>
#include "pcxhr.h"
#include "pcxhr_hwdep.h"
#include "pcxhr_core.h"
#include <sound/control.h>
#include <sound/tlv.h>
#include <sound/asoundef.h>
#include "pcxhr_mixer.h"


#define PCXHR_ANALOG_CAPTURE_LEVEL_MIN   0      /* -96.0 dB */
#define PCXHR_ANALOG_CAPTURE_LEVEL_MAX   255    /* +31.5 dB */
#define PCXHR_ANALOG_CAPTURE_ZERO_LEVEL  224    /* +16.0 dB ( +31.5 dB - fix level +15.5 dB ) */

#define PCXHR_ANALOG_PLAYBACK_LEVEL_MIN  0      /* -128.0 dB */
#define PCXHR_ANALOG_PLAYBACK_LEVEL_MAX  128    /*    0.0 dB */
#define PCXHR_ANALOG_PLAYBACK_ZERO_LEVEL 104    /*  -24.0 dB ( 0.0 dB - fix level +24.0 dB ) */

static const DECLARE_TLV_DB_SCALE(db_scale_analog_capture, -9600, 50, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_analog_playback, -12800, 100, 0);

static int pcxhr_update_analog_audio_level(struct snd_pcxhr *chip, int is_capture, int channel)
{
      int err, vol;
      struct pcxhr_rmh rmh;

      pcxhr_init_rmh(&rmh, CMD_ACCESS_IO_WRITE);
      if (is_capture) {
            rmh.cmd[0] |= IO_NUM_REG_IN_ANA_LEVEL;
            rmh.cmd[2] = chip->analog_capture_volume[channel];
      } else {
            rmh.cmd[0] |= IO_NUM_REG_OUT_ANA_LEVEL;
            if (chip->analog_playback_active[channel])
                  vol = chip->analog_playback_volume[channel];
            else
                  vol = PCXHR_ANALOG_PLAYBACK_LEVEL_MIN;
            rmh.cmd[2] = PCXHR_ANALOG_PLAYBACK_LEVEL_MAX - vol;   /* playback analog levels are inversed */
      }
      rmh.cmd[1]  = 1 << ((2 * chip->chip_idx) + channel);  /* audio mask */
      rmh.cmd_len = 3;
      err = pcxhr_send_msg(chip->mgr, &rmh);
      if (err < 0) {
            snd_printk(KERN_DEBUG "error update_analog_audio_level card(%d) "
                     "is_capture(%d) err(%x)\n", chip->chip_idx, is_capture, err);
            return -EINVAL;
      }
      return 0;
}

/*
 * analog level control
 */
static int pcxhr_analog_vol_info(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_info *uinfo)
{
      uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
      uinfo->count = 2;
      if (kcontrol->private_value == 0) { /* playback */
            uinfo->value.integer.min = PCXHR_ANALOG_PLAYBACK_LEVEL_MIN; /* -128 dB */
            uinfo->value.integer.max = PCXHR_ANALOG_PLAYBACK_LEVEL_MAX; /* 0 dB */
      } else {                      /* capture */
            uinfo->value.integer.min = PCXHR_ANALOG_CAPTURE_LEVEL_MIN;  /* -96 dB */
            uinfo->value.integer.max = PCXHR_ANALOG_CAPTURE_LEVEL_MAX;  /* 31.5 dB */
      }
      return 0;
}

static int pcxhr_analog_vol_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      mutex_lock(&chip->mgr->mixer_mutex);
      if (kcontrol->private_value == 0) { /* playback */
            ucontrol->value.integer.value[0] = chip->analog_playback_volume[0];
            ucontrol->value.integer.value[1] = chip->analog_playback_volume[1];
      } else {                      /* capture */
            ucontrol->value.integer.value[0] = chip->analog_capture_volume[0];
            ucontrol->value.integer.value[1] = chip->analog_capture_volume[1];
      }
      mutex_unlock(&chip->mgr->mixer_mutex);
      return 0;
}

static int pcxhr_analog_vol_put(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      int changed = 0;
      int is_capture, i;

      mutex_lock(&chip->mgr->mixer_mutex);
      is_capture = (kcontrol->private_value != 0);
      for (i = 0; i < 2; i++) {
            int  new_volume = ucontrol->value.integer.value[i];
            int* stored_volume = is_capture ? &chip->analog_capture_volume[i] :
                  &chip->analog_playback_volume[i];
            if (*stored_volume != new_volume) {
                  *stored_volume = new_volume;
                  changed = 1;
                  pcxhr_update_analog_audio_level(chip, is_capture, i);
            }
      }
      mutex_unlock(&chip->mgr->mixer_mutex);
      return changed;
}

static struct snd_kcontrol_new pcxhr_control_analog_level = {
      .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
      .access =   (SNDRV_CTL_ELEM_ACCESS_READWRITE |
                   SNDRV_CTL_ELEM_ACCESS_TLV_READ),
      /* name will be filled later */
      .info =           pcxhr_analog_vol_info,
      .get =            pcxhr_analog_vol_get,
      .put =            pcxhr_analog_vol_put,
      /* tlv will be filled later */
};

/* shared */
static int pcxhr_sw_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
      uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
      uinfo->count = 2;
      uinfo->value.integer.min = 0;
      uinfo->value.integer.max = 1;
      return 0;
}

static int pcxhr_audio_sw_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);

      mutex_lock(&chip->mgr->mixer_mutex);
      ucontrol->value.integer.value[0] = chip->analog_playback_active[0];
      ucontrol->value.integer.value[1] = chip->analog_playback_active[1];
      mutex_unlock(&chip->mgr->mixer_mutex);
      return 0;
}

static int pcxhr_audio_sw_put(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      int i, changed = 0;
      mutex_lock(&chip->mgr->mixer_mutex);
      for(i = 0; i < 2; i++) {
            if (chip->analog_playback_active[i] != ucontrol->value.integer.value[i]) {
                  chip->analog_playback_active[i] = ucontrol->value.integer.value[i];
                  changed = 1;
                  pcxhr_update_analog_audio_level(chip, 0, i);    /* update playback levels */
            }
      }
      mutex_unlock(&chip->mgr->mixer_mutex);
      return changed;
}

static struct snd_kcontrol_new pcxhr_control_output_switch = {
      .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
      .name =           "Master Playback Switch",
      .info =           pcxhr_sw_info,          /* shared */
      .get =            pcxhr_audio_sw_get,
      .put =            pcxhr_audio_sw_put
};


#define PCXHR_DIGITAL_LEVEL_MIN           0x000 /* -110 dB */
#define PCXHR_DIGITAL_LEVEL_MAX           0x1ff /* +18 dB */
#define PCXHR_DIGITAL_ZERO_LEVEL    0x1b7 /*  0 dB */

static const DECLARE_TLV_DB_SCALE(db_scale_digital, -10950, 50, 0);

#define MORE_THAN_ONE_STREAM_LEVEL  0x000001
#define VALID_STREAM_PAN_LEVEL_MASK 0x800000
#define VALID_STREAM_LEVEL_MASK           0x400000
#define VALID_STREAM_LEVEL_1_MASK   0x200000
#define VALID_STREAM_LEVEL_2_MASK   0x100000

static int pcxhr_update_playback_stream_level(struct snd_pcxhr* chip, int idx)
{
      int err;
      struct pcxhr_rmh rmh;
      struct pcxhr_pipe *pipe = &chip->playback_pipe;
      int left, right;

      if (chip->digital_playback_active[idx][0])
            left = chip->digital_playback_volume[idx][0];
      else
            left = PCXHR_DIGITAL_LEVEL_MIN;
      if (chip->digital_playback_active[idx][1])
            right = chip->digital_playback_volume[idx][1];
      else
            right = PCXHR_DIGITAL_LEVEL_MIN;

      pcxhr_init_rmh(&rmh, CMD_STREAM_OUT_LEVEL_ADJUST);
      /* add pipe and stream mask */
      pcxhr_set_pipe_cmd_params(&rmh, 0, pipe->first_audio, 0, 1<<idx);
      /* volume left->left / right->right panoramic level */
      rmh.cmd[0] |= MORE_THAN_ONE_STREAM_LEVEL;
      rmh.cmd[2]  = VALID_STREAM_PAN_LEVEL_MASK | VALID_STREAM_LEVEL_1_MASK;
      rmh.cmd[2] |= (left << 10);
      rmh.cmd[3]  = VALID_STREAM_PAN_LEVEL_MASK | VALID_STREAM_LEVEL_2_MASK;
      rmh.cmd[3] |= right;
      rmh.cmd_len = 4;

      err = pcxhr_send_msg(chip->mgr, &rmh);
      if (err < 0) {
            snd_printk(KERN_DEBUG "error update_playback_stream_level "
                     "card(%d) err(%x)\n", chip->chip_idx, err);
            return -EINVAL;
      }
      return 0;
}

#define AUDIO_IO_HAS_MUTE_LEVEL           0x400000
#define AUDIO_IO_HAS_MUTE_MONITOR_1 0x200000
#define VALID_AUDIO_IO_DIGITAL_LEVEL      0x000001
#define VALID_AUDIO_IO_MONITOR_LEVEL      0x000002
#define VALID_AUDIO_IO_MUTE_LEVEL   0x000004
#define VALID_AUDIO_IO_MUTE_MONITOR_1     0x000008

static int pcxhr_update_audio_pipe_level(struct snd_pcxhr* chip, int capture, int channel)
{
      int err;
      struct pcxhr_rmh rmh;
      struct pcxhr_pipe *pipe;

      if (capture)
            pipe = &chip->capture_pipe[0];
      else
            pipe = &chip->playback_pipe;

      pcxhr_init_rmh(&rmh, CMD_AUDIO_LEVEL_ADJUST);
      /* add channel mask */
      pcxhr_set_pipe_cmd_params(&rmh, capture, 0, 0, 1 << (channel + pipe->first_audio));
      /* TODO : if mask (3 << pipe->first_audio) is used, left and right channel
       * will be programmed to the same params
       */
      if (capture) {
            rmh.cmd[0] |= VALID_AUDIO_IO_DIGITAL_LEVEL;
            /* VALID_AUDIO_IO_MUTE_LEVEL not yet handled (capture pipe level) */
            rmh.cmd[2] = chip->digital_capture_volume[channel];
      } else {
            rmh.cmd[0] |= VALID_AUDIO_IO_MONITOR_LEVEL | VALID_AUDIO_IO_MUTE_MONITOR_1;
            /* VALID_AUDIO_IO_DIGITAL_LEVEL and VALID_AUDIO_IO_MUTE_LEVEL not yet
             * handled (playback pipe level)
             */
            rmh.cmd[2] = chip->monitoring_volume[channel] << 10;
            if (chip->monitoring_active[channel] == 0)
                  rmh.cmd[2] |= AUDIO_IO_HAS_MUTE_MONITOR_1;
      }
      rmh.cmd_len = 3;

      err = pcxhr_send_msg(chip->mgr, &rmh);
      if(err<0) {
            snd_printk(KERN_DEBUG "error update_audio_level card(%d) err(%x)\n",
                     chip->chip_idx, err);
            return -EINVAL;
      }
      return 0;
}


/* shared */
static int pcxhr_digital_vol_info(struct snd_kcontrol *kcontrol,
                          struct snd_ctl_elem_info *uinfo)
{
      uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
      uinfo->count = 2;
      uinfo->value.integer.min = PCXHR_DIGITAL_LEVEL_MIN;   /* -109.5 dB */
      uinfo->value.integer.max = PCXHR_DIGITAL_LEVEL_MAX;   /*   18.0 dB */
      return 0;
}


static int pcxhr_pcm_vol_get(struct snd_kcontrol *kcontrol,
                       struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);           /* index */
      int *stored_volume;
      int is_capture = kcontrol->private_value;

      mutex_lock(&chip->mgr->mixer_mutex);
      if (is_capture)
            stored_volume = chip->digital_capture_volume;         /* digital capture */
      else
            stored_volume = chip->digital_playback_volume[idx];   /* digital playback */
      ucontrol->value.integer.value[0] = stored_volume[0];
      ucontrol->value.integer.value[1] = stored_volume[1];
      mutex_unlock(&chip->mgr->mixer_mutex);
      return 0;
}

static int pcxhr_pcm_vol_put(struct snd_kcontrol *kcontrol,
                       struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);           /* index */
      int changed = 0;
      int is_capture = kcontrol->private_value;
      int *stored_volume;
      int i;

      mutex_lock(&chip->mgr->mixer_mutex);
      if (is_capture)
            stored_volume = chip->digital_capture_volume;         /* digital capture */
      else
            stored_volume = chip->digital_playback_volume[idx];   /* digital playback */
      for (i = 0; i < 2; i++) {
            if (stored_volume[i] != ucontrol->value.integer.value[i]) {
                  stored_volume[i] = ucontrol->value.integer.value[i];
                  changed = 1;
                  if (is_capture)   /* update capture volume */
                        pcxhr_update_audio_pipe_level(chip, 1, i);
            }
      }
      if (! is_capture && changed)
            pcxhr_update_playback_stream_level(chip, idx);  /* update playback volume */
      mutex_unlock(&chip->mgr->mixer_mutex);
      return changed;
}

static struct snd_kcontrol_new snd_pcxhr_pcm_vol =
{
      .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
      .access =   (SNDRV_CTL_ELEM_ACCESS_READWRITE |
                   SNDRV_CTL_ELEM_ACCESS_TLV_READ),
      /* name will be filled later */
      /* count will be filled later */
      .info =           pcxhr_digital_vol_info,       /* shared */
      .get =            pcxhr_pcm_vol_get,
      .put =            pcxhr_pcm_vol_put,
      .tlv = { .p = db_scale_digital },
};


static int pcxhr_pcm_sw_get(struct snd_kcontrol *kcontrol,
                      struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); /* index */

      mutex_lock(&chip->mgr->mixer_mutex);
      ucontrol->value.integer.value[0] = chip->digital_playback_active[idx][0];
      ucontrol->value.integer.value[1] = chip->digital_playback_active[idx][1];
      mutex_unlock(&chip->mgr->mixer_mutex);
      return 0;
}

static int pcxhr_pcm_sw_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      int changed = 0;
      int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); /* index */
      int i, j;

      mutex_lock(&chip->mgr->mixer_mutex);
      j = idx;
      for (i = 0; i < 2; i++) {
            if (chip->digital_playback_active[j][i] != ucontrol->value.integer.value[i]) {
                  chip->digital_playback_active[j][i] = ucontrol->value.integer.value[i];
                  changed = 1;
            }
      }
      if (changed)
            pcxhr_update_playback_stream_level(chip, idx);
      mutex_unlock(&chip->mgr->mixer_mutex);
      return changed;
}

static struct snd_kcontrol_new pcxhr_control_pcm_switch = {
      .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
      .name =           "PCM Playback Switch",
      .count =    PCXHR_PLAYBACK_STREAMS,
      .info =           pcxhr_sw_info,          /* shared */
      .get =            pcxhr_pcm_sw_get,
      .put =            pcxhr_pcm_sw_put
};


/*
 * monitoring level control
 */

static int pcxhr_monitor_vol_get(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      mutex_lock(&chip->mgr->mixer_mutex);
      ucontrol->value.integer.value[0] = chip->monitoring_volume[0];
      ucontrol->value.integer.value[1] = chip->monitoring_volume[1];
      mutex_unlock(&chip->mgr->mixer_mutex);
      return 0;
}

static int pcxhr_monitor_vol_put(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      int changed = 0;
      int i;

      mutex_lock(&chip->mgr->mixer_mutex);
      for (i = 0; i < 2; i++) {
            if (chip->monitoring_volume[i] != ucontrol->value.integer.value[i]) {
                  chip->monitoring_volume[i] = ucontrol->value.integer.value[i];
                  if(chip->monitoring_active[i])      /* do only when monitoring is unmuted */
                        /* update monitoring volume and mute */
                        pcxhr_update_audio_pipe_level(chip, 0, i);
                  changed = 1;
            }
      }
      mutex_unlock(&chip->mgr->mixer_mutex);
      return changed;
}

static struct snd_kcontrol_new pcxhr_control_monitor_vol = {
      .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
      .access =   (SNDRV_CTL_ELEM_ACCESS_READWRITE |
                   SNDRV_CTL_ELEM_ACCESS_TLV_READ),
      .name =         "Monitoring Volume",
      .info =           pcxhr_digital_vol_info,       /* shared */
      .get =            pcxhr_monitor_vol_get,
      .put =            pcxhr_monitor_vol_put,
      .tlv = { .p = db_scale_digital },
};

/*
 * monitoring switch control
 */

static int pcxhr_monitor_sw_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      mutex_lock(&chip->mgr->mixer_mutex);
      ucontrol->value.integer.value[0] = chip->monitoring_active[0];
      ucontrol->value.integer.value[1] = chip->monitoring_active[1];
      mutex_unlock(&chip->mgr->mixer_mutex);
      return 0;
}

static int pcxhr_monitor_sw_put(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      int changed = 0;
      int i;

      mutex_lock(&chip->mgr->mixer_mutex);
      for (i = 0; i < 2; i++) {
            if (chip->monitoring_active[i] != ucontrol->value.integer.value[i]) {
                  chip->monitoring_active[i] = ucontrol->value.integer.value[i];
                  changed |= (1<<i); /* mask 0x01 and 0x02 */
            }
      }
      if(changed & 0x01)
            /* update left monitoring volume and mute */
            pcxhr_update_audio_pipe_level(chip, 0, 0);
      if(changed & 0x02)
            /* update right monitoring volume and mute */
            pcxhr_update_audio_pipe_level(chip, 0, 1);

      mutex_unlock(&chip->mgr->mixer_mutex);
      return (changed != 0);
}

static struct snd_kcontrol_new pcxhr_control_monitor_sw = {
      .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
      .name =         "Monitoring Switch",
      .info =         pcxhr_sw_info,            /* shared */
      .get =          pcxhr_monitor_sw_get,
      .put =          pcxhr_monitor_sw_put
};



/*
 * audio source select
 */
#define PCXHR_SOURCE_AUDIO01_UER    0x000100
#define PCXHR_SOURCE_AUDIO01_SYNC   0x000200
#define PCXHR_SOURCE_AUDIO23_UER    0x000400
#define PCXHR_SOURCE_AUDIO45_UER    0x001000
#define PCXHR_SOURCE_AUDIO67_UER    0x040000

static int pcxhr_set_audio_source(struct snd_pcxhr* chip)
{
      struct pcxhr_rmh rmh;
      unsigned int mask, reg;
      unsigned int codec;
      int err, use_src, changed;

      switch (chip->chip_idx) {
      case 0 : mask = PCXHR_SOURCE_AUDIO01_UER; codec = CS8420_01_CS; break;
      case 1 : mask = PCXHR_SOURCE_AUDIO23_UER; codec = CS8420_23_CS; break;
      case 2 : mask = PCXHR_SOURCE_AUDIO45_UER; codec = CS8420_45_CS; break;
      case 3 : mask = PCXHR_SOURCE_AUDIO67_UER; codec = CS8420_67_CS; break;
      default: return -EINVAL;
      }
      reg = 0;    /* audio source from analog plug */
      use_src = 0;      /* do not activate codec SRC */

      if (chip->audio_capture_source != 0) {
            reg = mask; /* audio source from digital plug */
            if (chip->audio_capture_source == 2)
                  use_src = 1;
      }
      /* set the input source */
      pcxhr_write_io_num_reg_cont(chip->mgr, mask, reg, &changed);
      /* resync them (otherwise channel inversion possible) */
      if (changed) {
            pcxhr_init_rmh(&rmh, CMD_RESYNC_AUDIO_INPUTS);
            rmh.cmd[0] |= (1 << chip->chip_idx);
            err = pcxhr_send_msg(chip->mgr, &rmh);
            if (err)
                  return err;
      }
      pcxhr_init_rmh(&rmh, CMD_ACCESS_IO_WRITE);      /* set codec SRC on off */
      rmh.cmd_len = 3;
      rmh.cmd[0] |= IO_NUM_UER_CHIP_REG;
      rmh.cmd[1] = codec;
      rmh.cmd[2] = (CS8420_DATA_FLOW_CTL & CHIP_SIG_AND_MAP_SPI) | (use_src ? 0x41 : 0x54);
      err = pcxhr_send_msg(chip->mgr, &rmh);
      if(err)
            return err;
      rmh.cmd[2] = (CS8420_CLOCK_SRC_CTL & CHIP_SIG_AND_MAP_SPI) | (use_src ? 0x41 : 0x49);
      err = pcxhr_send_msg(chip->mgr, &rmh);
      return err;
}

static int pcxhr_audio_src_info(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_info *uinfo)
{
      static char *texts[3] = {"Analog", "Digital", "Digi+SRC"};

      uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
      uinfo->count = 1;
      uinfo->value.enumerated.items = 3;
      if (uinfo->value.enumerated.item > 2)
            uinfo->value.enumerated.item = 2;
      strcpy(uinfo->value.enumerated.name,
            texts[uinfo->value.enumerated.item]);
      return 0;
}

static int pcxhr_audio_src_get(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      ucontrol->value.enumerated.item[0] = chip->audio_capture_source;
      return 0;
}

static int pcxhr_audio_src_put(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      int ret = 0;

      mutex_lock(&chip->mgr->mixer_mutex);
      if (chip->audio_capture_source != ucontrol->value.enumerated.item[0]) {
            chip->audio_capture_source = ucontrol->value.enumerated.item[0];
            pcxhr_set_audio_source(chip);
            ret = 1;
      }
      mutex_unlock(&chip->mgr->mixer_mutex);
      return ret;
}

static struct snd_kcontrol_new pcxhr_control_audio_src = {
      .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
      .name =           "Capture Source",
      .info =           pcxhr_audio_src_info,
      .get =            pcxhr_audio_src_get,
      .put =            pcxhr_audio_src_put,
};


/*
 * clock type selection
 * enum pcxhr_clock_type {
 *          PCXHR_CLOCK_TYPE_INTERNAL = 0,
 *          PCXHR_CLOCK_TYPE_WORD_CLOCK,
 *          PCXHR_CLOCK_TYPE_AES_SYNC,
 *          PCXHR_CLOCK_TYPE_AES_1,
 *          PCXHR_CLOCK_TYPE_AES_2,
 *          PCXHR_CLOCK_TYPE_AES_3,
 *          PCXHR_CLOCK_TYPE_AES_4,
 *    };
 */

static int pcxhr_clock_type_info(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_info *uinfo)
{
      static char *texts[7] = {
            "Internal", "WordClock", "AES Sync", "AES 1", "AES 2", "AES 3", "AES 4"
      };
      struct pcxhr_mgr *mgr = snd_kcontrol_chip(kcontrol);
      int clock_items = 3 + mgr->capture_chips;

      uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
      uinfo->count = 1;
      uinfo->value.enumerated.items = clock_items;
      if (uinfo->value.enumerated.item >= clock_items)
            uinfo->value.enumerated.item = clock_items-1;
      strcpy(uinfo->value.enumerated.name,
            texts[uinfo->value.enumerated.item]);
      return 0;
}

static int pcxhr_clock_type_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      struct pcxhr_mgr *mgr = snd_kcontrol_chip(kcontrol);
      ucontrol->value.enumerated.item[0] = mgr->use_clock_type;
      return 0;
}

static int pcxhr_clock_type_put(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      struct pcxhr_mgr *mgr = snd_kcontrol_chip(kcontrol);
      int rate, ret = 0;

      mutex_lock(&mgr->mixer_mutex);
      if (mgr->use_clock_type != ucontrol->value.enumerated.item[0]) {
            mutex_lock(&mgr->setup_mutex);
            mgr->use_clock_type = ucontrol->value.enumerated.item[0];
            if (mgr->use_clock_type)
                  pcxhr_get_external_clock(mgr, mgr->use_clock_type, &rate);
            else
                  rate = mgr->sample_rate;
            if (rate) {
                  pcxhr_set_clock(mgr, rate);
                  if (mgr->sample_rate)
                        mgr->sample_rate = rate;
            }
            mutex_unlock(&mgr->setup_mutex);
            ret = 1;    /* return 1 even if the set was not done. ok ? */
      }
      mutex_unlock(&mgr->mixer_mutex);
      return ret;
}

static struct snd_kcontrol_new pcxhr_control_clock_type = {
      .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
      .name =           "Clock Mode",
      .info =           pcxhr_clock_type_info,
      .get =            pcxhr_clock_type_get,
      .put =            pcxhr_clock_type_put,
};

/*
 * clock rate control
 * specific control that scans the sample rates on the external plugs
 */
static int pcxhr_clock_rate_info(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_info *uinfo)
{
      struct pcxhr_mgr *mgr = snd_kcontrol_chip(kcontrol);
      uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
      uinfo->count = 3 + mgr->capture_chips;
      uinfo->value.integer.min = 0;       /* clock not present */
      uinfo->value.integer.max = 192000;  /* max sample rate 192 kHz */
      return 0;
}

static int pcxhr_clock_rate_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      struct pcxhr_mgr *mgr = snd_kcontrol_chip(kcontrol);
      int i, err, rate;

      mutex_lock(&mgr->mixer_mutex);
      for(i = 0; i < 3 + mgr->capture_chips; i++) {
            if (i == PCXHR_CLOCK_TYPE_INTERNAL)
                  rate = mgr->sample_rate_real;
            else {
                  err = pcxhr_get_external_clock(mgr, i, &rate);
                  if (err)
                        break;
            }
            ucontrol->value.integer.value[i] = rate;
      }
      mutex_unlock(&mgr->mixer_mutex);
      return 0;
}

static struct snd_kcontrol_new pcxhr_control_clock_rate = {
      .access =   SNDRV_CTL_ELEM_ACCESS_READ,
      .iface =    SNDRV_CTL_ELEM_IFACE_CARD,
      .name =           "Clock Rates",
      .info =           pcxhr_clock_rate_info,
      .get =            pcxhr_clock_rate_get,
};

/*
 * IEC958 status bits
 */
static int pcxhr_iec958_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
      uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
      uinfo->count = 1;
      return 0;
}

static int pcxhr_iec958_capture_byte(struct snd_pcxhr *chip, int aes_idx, unsigned char* aes_bits)
{
      int i, err;
      unsigned char temp;
      struct pcxhr_rmh rmh;

      pcxhr_init_rmh(&rmh, CMD_ACCESS_IO_READ);
      rmh.cmd[0] |= IO_NUM_UER_CHIP_REG;
      switch (chip->chip_idx) {
      case 0:     rmh.cmd[1] = CS8420_01_CS; break;   /* use CS8416_01_CS for AES SYNC plug */
      case 1:     rmh.cmd[1] = CS8420_23_CS; break;
      case 2:     rmh.cmd[1] = CS8420_45_CS; break;
      case 3:     rmh.cmd[1] = CS8420_67_CS; break;
      default: return -EINVAL;
      }
      switch (aes_idx) {
      case 0:     rmh.cmd[2] = CS8420_CSB0; break;    /* use CS8416_CSBx for AES SYNC plug */
      case 1:     rmh.cmd[2] = CS8420_CSB1; break;
      case 2:     rmh.cmd[2] = CS8420_CSB2; break;
      case 3:     rmh.cmd[2] = CS8420_CSB3; break;
      case 4:     rmh.cmd[2] = CS8420_CSB4; break;
      default: return -EINVAL;
      }
      rmh.cmd[1] &= 0x0fffff;             /* size and code the chip id for the fpga */
      rmh.cmd[2] &= CHIP_SIG_AND_MAP_SPI; /* chip signature + map for spi read */
      rmh.cmd_len = 3;
      err = pcxhr_send_msg(chip->mgr, &rmh);
      if (err)
            return err;
      temp = 0;
      for (i = 0; i < 8; i++) {
            /* attention : reversed bit order (not with CS8416_01_CS) */
            temp <<= 1;
            if (rmh.stat[1] & (1 << i))
                  temp |= 1;
      }
      snd_printdd("read iec958 AES %d byte %d = 0x%x\n", chip->chip_idx, aes_idx, temp);
      *aes_bits = temp;
      return 0;
}

static int pcxhr_iec958_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      unsigned char aes_bits;
      int i, err;

      mutex_lock(&chip->mgr->mixer_mutex);
      for(i = 0; i < 5; i++) {
            if (kcontrol->private_value == 0)   /* playback */
                  aes_bits = chip->aes_bits[i];
            else {                        /* capture */
                  err = pcxhr_iec958_capture_byte(chip, i, &aes_bits);
                  if (err)
                        break;
            }
            ucontrol->value.iec958.status[i] = aes_bits;
      }
      mutex_unlock(&chip->mgr->mixer_mutex);
        return 0;
}

static int pcxhr_iec958_mask_get(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
{
      int i;
      for (i = 0; i < 5; i++)
            ucontrol->value.iec958.status[i] = 0xff;
        return 0;
}

static int pcxhr_iec958_update_byte(struct snd_pcxhr *chip, int aes_idx, unsigned char aes_bits)
{
      int i, err, cmd;
      unsigned char new_bits = aes_bits;
      unsigned char old_bits = chip->aes_bits[aes_idx];
      struct pcxhr_rmh rmh;

      for (i = 0; i < 8; i++) {
            if ((old_bits & 0x01) != (new_bits & 0x01)) {
                  cmd = chip->chip_idx & 0x03;        /* chip index 0..3 */
                  if(chip->chip_idx > 3)
                        /* new bit used if chip_idx>3 (PCX1222HR) */
                        cmd |= 1 << 22;
                  cmd |= ((aes_idx << 3) + i) << 2;   /* add bit offset */
                  cmd |= (new_bits & 0x01) << 23;           /* add bit value */
                  pcxhr_init_rmh(&rmh, CMD_ACCESS_IO_WRITE);
                  rmh.cmd[0] |= IO_NUM_REG_CUER;
                  rmh.cmd[1] = cmd;
                  rmh.cmd_len = 2;
                  snd_printdd("write iec958 AES %d byte %d bit %d (cmd %x)\n",
                            chip->chip_idx, aes_idx, i, cmd);
                  err = pcxhr_send_msg(chip->mgr, &rmh);
                  if (err)
                        return err;
            }
            old_bits >>= 1;
            new_bits >>= 1;
      }
      chip->aes_bits[aes_idx] = aes_bits;
      return 0;
}

static int pcxhr_iec958_put(struct snd_kcontrol *kcontrol,
                      struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
      int i, changed = 0;

      /* playback */
      mutex_lock(&chip->mgr->mixer_mutex);
      for (i = 0; i < 5; i++) {
            if (ucontrol->value.iec958.status[i] != chip->aes_bits[i]) {
                  pcxhr_iec958_update_byte(chip, i, ucontrol->value.iec958.status[i]);
                  changed = 1;
            }
      }
      mutex_unlock(&chip->mgr->mixer_mutex);
      return changed;
}

static struct snd_kcontrol_new pcxhr_control_playback_iec958_mask = {
      .access =   SNDRV_CTL_ELEM_ACCESS_READ,
      .iface =    SNDRV_CTL_ELEM_IFACE_PCM,
      .name =           SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
      .info =           pcxhr_iec958_info,
      .get =            pcxhr_iec958_mask_get
};
static struct snd_kcontrol_new pcxhr_control_playback_iec958 = {
      .iface =    SNDRV_CTL_ELEM_IFACE_PCM,
      .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
      .info =         pcxhr_iec958_info,
      .get =          pcxhr_iec958_get,
      .put =          pcxhr_iec958_put,
      .private_value = 0 /* playback */
};

static struct snd_kcontrol_new pcxhr_control_capture_iec958_mask = {
      .access =   SNDRV_CTL_ELEM_ACCESS_READ,
      .iface =    SNDRV_CTL_ELEM_IFACE_PCM,
      .name =           SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
      .info =           pcxhr_iec958_info,
      .get =            pcxhr_iec958_mask_get
};
static struct snd_kcontrol_new pcxhr_control_capture_iec958 = {
      .access =   SNDRV_CTL_ELEM_ACCESS_READ,
      .iface =    SNDRV_CTL_ELEM_IFACE_PCM,
      .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
      .info =         pcxhr_iec958_info,
      .get =          pcxhr_iec958_get,
      .private_value = 1 /* capture */
};

static void pcxhr_init_audio_levels(struct snd_pcxhr *chip)
{
      int i;

      for (i = 0; i < 2; i++) {
            if (chip->nb_streams_play) {
                  int j;
                  /* at boot time the digital volumes are unmuted 0dB */
                  for (j = 0; j < PCXHR_PLAYBACK_STREAMS; j++) {
                        chip->digital_playback_active[j][i] = 1;
                        chip->digital_playback_volume[j][i] = PCXHR_DIGITAL_ZERO_LEVEL;
                  }
                  /* after boot, only two bits are set on the uer interface */
                  chip->aes_bits[0] = IEC958_AES0_PROFESSIONAL | IEC958_AES0_PRO_FS_48000;
/* only for test purpose, remove later */
#ifdef CONFIG_SND_DEBUG
                  /* analog volumes for playback (is LEVEL_MIN after boot) */
                  chip->analog_playback_active[i] = 1;
                  chip->analog_playback_volume[i] = PCXHR_ANALOG_PLAYBACK_ZERO_LEVEL;
                  pcxhr_update_analog_audio_level(chip, 0, i);
#endif
/* test end */
            }
            if (chip->nb_streams_capt) {
                  /* at boot time the digital volumes are unmuted 0dB */
                  chip->digital_capture_volume[i] = PCXHR_DIGITAL_ZERO_LEVEL;
/* only for test purpose, remove later */
#ifdef CONFIG_SND_DEBUG
                  /* analog volumes for playback (is LEVEL_MIN after boot) */
                  chip->analog_capture_volume[i]  = PCXHR_ANALOG_CAPTURE_ZERO_LEVEL;
                  pcxhr_update_analog_audio_level(chip, 1, i);
#endif
/* test end */
            }
      }

      return;
}


int pcxhr_create_mixer(struct pcxhr_mgr *mgr)
{
      struct snd_pcxhr *chip;
      int err, i;

      mutex_init(&mgr->mixer_mutex); /* can be in another place */

      for (i = 0; i < mgr->num_cards; i++) {
            struct snd_kcontrol_new temp;
            chip = mgr->chip[i];

            if (chip->nb_streams_play) {
                  /* analog output level control */
                  temp = pcxhr_control_analog_level;
                  temp.name = "Master Playback Volume";
                  temp.private_value = 0; /* playback */
                  temp.tlv.p = db_scale_analog_playback;
                  if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&temp, chip))) < 0)
                        return err;
                  /* output mute controls */
                  if ((err = snd_ctl_add(chip->card,
                                     snd_ctl_new1(&pcxhr_control_output_switch,
                                              chip))) < 0)
                        return err;
                  
                  temp = snd_pcxhr_pcm_vol;
                  temp.name = "PCM Playback Volume";
                  temp.count = PCXHR_PLAYBACK_STREAMS;
                  temp.private_value = 0; /* playback */
                  if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&temp, chip))) < 0)
                        return err;

                  if ((err = snd_ctl_add(chip->card,
                                     snd_ctl_new1(&pcxhr_control_pcm_switch,
                                              chip))) < 0)
                        return err;

                  /* IEC958 controls */
                  if ((err = snd_ctl_add(chip->card,
                                     snd_ctl_new1(&pcxhr_control_playback_iec958_mask,
                                              chip))) < 0)
                        return err;
                  if ((err = snd_ctl_add(chip->card,
                                     snd_ctl_new1(&pcxhr_control_playback_iec958,
                                              chip))) < 0)
                        return err;
            }
            if (chip->nb_streams_capt) {
                  /* analog input level control only on first two chips !*/
                  temp = pcxhr_control_analog_level;
                  temp.name = "Master Capture Volume";
                  temp.private_value = 1; /* capture */
                  temp.tlv.p = db_scale_analog_capture;
                  if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&temp, chip))) < 0)
                        return err;

                  temp = snd_pcxhr_pcm_vol;
                  temp.name = "PCM Capture Volume";
                  temp.count = 1;
                  temp.private_value = 1; /* capture */
                  if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&temp, chip))) < 0)
                        return err;
                  /* Audio source */
                  if ((err = snd_ctl_add(chip->card,
                                     snd_ctl_new1(&pcxhr_control_audio_src,
                                              chip))) < 0)
                        return err;
                  /* IEC958 controls */
                  if ((err = snd_ctl_add(chip->card,
                                     snd_ctl_new1(&pcxhr_control_capture_iec958_mask,
                                              chip))) < 0)
                        return err;
                  if ((err = snd_ctl_add(chip->card,
                                     snd_ctl_new1(&pcxhr_control_capture_iec958,
                                              chip))) < 0)
                        return err;
            }
            /* monitoring only if playback and capture device available */
            if (chip->nb_streams_capt > 0 && chip->nb_streams_play > 0) {
                  /* monitoring */
                  if ((err = snd_ctl_add(chip->card,
                                     snd_ctl_new1(&pcxhr_control_monitor_vol,
                                              chip))) < 0)
                        return err;
                  if ((err = snd_ctl_add(chip->card,
                                     snd_ctl_new1(&pcxhr_control_monitor_sw,
                                              chip))) < 0)
                        return err;
            }

            if (i == 0) {
                  /* clock mode only one control per pcxhr */
                  if ((err = snd_ctl_add(chip->card,
                                     snd_ctl_new1(&pcxhr_control_clock_type,
                                              mgr))) < 0)
                        return err;
                  /* non standard control used to scan the external clock presence/frequencies */
                  if ((err = snd_ctl_add(chip->card,
                                     snd_ctl_new1(&pcxhr_control_clock_rate,
                                              mgr))) < 0)
                        return err;
            }

            /* init values for the mixer data */
            pcxhr_init_audio_levels(chip);
      }

      return 0;
}

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