/*
 * Driver for Digigram VX soundcards
 *
 * Common mixer part
 *
 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
 *
 *   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/core.h>
#include <sound/control.h>
#include <sound/tlv.h>
#include <sound/vx_core.h>
#include "vx_cmd.h"


/*
 * write a codec data (24bit)
 */
static void vx_write_codec_reg(struct vx_core *chip, int codec, unsigned int data)
{
        if (snd_BUG_ON(!chip->ops->write_codec))
                return;

        if (chip->chip_status & VX_STAT_IS_STALE)
                return;

        mutex_lock(&chip->lock);
        chip->ops->write_codec(chip, codec, data);
        mutex_unlock(&chip->lock);
}

/*
 * Data type used to access the Codec
 */
union vx_codec_data {
        u32 l;
#ifdef SNDRV_BIG_ENDIAN
        struct w {
                u16 h;
                u16 l;
        } w;
        struct b {
                u8 hh;
                u8 mh;
                u8 ml;
                u8 ll;
        } b;
#else /* LITTLE_ENDIAN */
        struct w {
                u16 l;
                u16 h;
        } w;
        struct b {
                u8 ll;
                u8 ml;
                u8 mh;
                u8 hh;
        } b;
#endif
};

#define SET_CDC_DATA_SEL(di,s)          ((di).b.mh = (u8) (s))
#define SET_CDC_DATA_REG(di,r)          ((di).b.ml = (u8) (r))
#define SET_CDC_DATA_VAL(di,d)          ((di).b.ll = (u8) (d))
#define SET_CDC_DATA_INIT(di)           ((di).l = 0L, SET_CDC_DATA_SEL(di,XX_CODEC_SELECTOR))

/*
 * set up codec register and write the value
 * @codec: the codec id, 0 or 1
 * @reg: register index
 * @val: data value
 */
static void vx_set_codec_reg(struct vx_core *chip, int codec, int reg, int val)
{
        union vx_codec_data data;
        /* DAC control register */
        SET_CDC_DATA_INIT(data);
        SET_CDC_DATA_REG(data, reg);
        SET_CDC_DATA_VAL(data, val);
        vx_write_codec_reg(chip, codec, data.l);
}


/*
 * vx_set_analog_output_level - set the output attenuation level
 * @codec: the output codec, 0 or 1.  (1 for VXP440 only)
 * @left: left output level, 0 = mute
 * @right: right output level
 */
static void vx_set_analog_output_level(struct vx_core *chip, int codec, int left, int right)
{
        left  = chip->hw->output_level_max - left;
        right = chip->hw->output_level_max - right;

        if (chip->ops->akm_write) {
                chip->ops->akm_write(chip, XX_CODEC_LEVEL_LEFT_REGISTER, left);
                chip->ops->akm_write(chip, XX_CODEC_LEVEL_RIGHT_REGISTER, right);
        } else {
                /* convert to attenuation level: 0 = 0dB (max), 0xe3 = -113.5 dB (min) */
                vx_set_codec_reg(chip, codec, XX_CODEC_LEVEL_LEFT_REGISTER, left);
                vx_set_codec_reg(chip, codec, XX_CODEC_LEVEL_RIGHT_REGISTER, right);
        }
}


/*
 * vx_toggle_dac_mute -  mute/unmute DAC
 * @mute: 0 = unmute, 1 = mute
 */

#define DAC_ATTEN_MIN   0x08
#define DAC_ATTEN_MAX   0x38

void vx_toggle_dac_mute(struct vx_core *chip, int mute)
{
        unsigned int i;
        for (i = 0; i < chip->hw->num_codecs; i++) {
                if (chip->ops->akm_write)
                        chip->ops->akm_write(chip, XX_CODEC_DAC_CONTROL_REGISTER, mute); /* XXX */
                else
                        vx_set_codec_reg(chip, i, XX_CODEC_DAC_CONTROL_REGISTER,
                                         mute ? DAC_ATTEN_MAX : DAC_ATTEN_MIN);
        }
}

/*
 * vx_reset_codec - reset and initialize the codecs
 */
void vx_reset_codec(struct vx_core *chip, int cold_reset)
{
        unsigned int i;
        int port = chip->type >= VX_TYPE_VXPOCKET ? 0x75 : 0x65;

        chip->ops->reset_codec(chip);

        /* AKM codecs should be initialized in reset_codec callback */
        if (! chip->ops->akm_write) {
                /* initialize old codecs */
                for (i = 0; i < chip->hw->num_codecs; i++) {
                        /* DAC control register (change level when zero crossing + mute) */
                        vx_set_codec_reg(chip, i, XX_CODEC_DAC_CONTROL_REGISTER, DAC_ATTEN_MAX);
                        /* ADC control register */
                        vx_set_codec_reg(chip, i, XX_CODEC_ADC_CONTROL_REGISTER, 0x00);
                        /* Port mode register */
                        vx_set_codec_reg(chip, i, XX_CODEC_PORT_MODE_REGISTER, port);
                        /* Clock control register */
                        vx_set_codec_reg(chip, i, XX_CODEC_CLOCK_CONTROL_REGISTER, 0x00);
                }
        }

        /* mute analog output */
        for (i = 0; i < chip->hw->num_codecs; i++) {
                chip->output_level[i][0] = 0;
                chip->output_level[i][1] = 0;
                vx_set_analog_output_level(chip, i, 0, 0);
        }
}

/*
 * change the audio input source
 * @src: the target source (VX_AUDIO_SRC_XXX)
 */
static void vx_change_audio_source(struct vx_core *chip, int src)
{
        if (chip->chip_status & VX_STAT_IS_STALE)
                return;

        mutex_lock(&chip->lock);
        chip->ops->change_audio_source(chip, src);
        mutex_unlock(&chip->lock);
}


/*
 * change the audio source if necessary and possible
 * returns 1 if the source is actually changed.
 */
int vx_sync_audio_source(struct vx_core *chip)
{
        if (chip->audio_source_target == chip->audio_source ||
            chip->pcm_running)
                return 0;
        vx_change_audio_source(chip, chip->audio_source_target);
        chip->audio_source = chip->audio_source_target;
        return 1;
}


/*
 * audio level, mute, monitoring
 */
struct vx_audio_level {
        unsigned int has_level: 1;
        unsigned int has_monitor_level: 1;
        unsigned int has_mute: 1;
        unsigned int has_monitor_mute: 1;
        unsigned int mute;
        unsigned int monitor_mute;
        short level;
        short monitor_level;
};

static int vx_adjust_audio_level(struct vx_core *chip, int audio, int capture,
                                 struct vx_audio_level *info)
{
        struct vx_rmh rmh;

        if (chip->chip_status & VX_STAT_IS_STALE)
                return -EBUSY;

        vx_init_rmh(&rmh, CMD_AUDIO_LEVEL_ADJUST);
        if (capture)
                rmh.Cmd[0] |= COMMAND_RECORD_MASK;
        /* Add Audio IO mask */
        rmh.Cmd[1] = 1 << audio;
        rmh.Cmd[2] = 0;
        if (info->has_level) {
                rmh.Cmd[0] |=  VALID_AUDIO_IO_DIGITAL_LEVEL;
                rmh.Cmd[2] |= info->level;
        }
        if (info->has_monitor_level) {
                rmh.Cmd[0] |=  VALID_AUDIO_IO_MONITORING_LEVEL;
                rmh.Cmd[2] |= ((unsigned int)info->monitor_level << 10);
        }
        if (info->has_mute) { 
                rmh.Cmd[0] |= VALID_AUDIO_IO_MUTE_LEVEL;
                if (info->mute)
                        rmh.Cmd[2] |= AUDIO_IO_HAS_MUTE_LEVEL;
        }
        if (info->has_monitor_mute) {
                /* validate flag for M2 at least to unmute it */ 
                rmh.Cmd[0] |=  VALID_AUDIO_IO_MUTE_MONITORING_1 | VALID_AUDIO_IO_MUTE_MONITORING_2;
                if (info->monitor_mute)
                        rmh.Cmd[2] |= AUDIO_IO_HAS_MUTE_MONITORING_1;
        }

        return vx_send_msg(chip, &rmh);
}

    
#if 0 // not used
static int vx_read_audio_level(struct vx_core *chip, int audio, int capture,
                               struct vx_audio_level *info)
{
        int err;
        struct vx_rmh rmh;

        memset(info, 0, sizeof(*info));
        vx_init_rmh(&rmh, CMD_GET_AUDIO_LEVELS);
        if (capture)
                rmh.Cmd[0] |= COMMAND_RECORD_MASK;
        /* Add Audio IO mask */
        rmh.Cmd[1] = 1 << audio;
        err = vx_send_msg(chip, &rmh);
        if (err < 0)
                return err;
        info.level = rmh.Stat[0] & MASK_DSP_WORD_LEVEL;
        info.monitor_level = (rmh.Stat[0] >> 10) & MASK_DSP_WORD_LEVEL;
        info.mute = (rmh.Stat[i] & AUDIO_IO_HAS_MUTE_LEVEL) ? 1 : 0;
        info.monitor_mute = (rmh.Stat[i] & AUDIO_IO_HAS_MUTE_MONITORING_1) ? 1 : 0;
        return 0;
}
#endif // not used

/*
 * set the monitoring level and mute state of the given audio
 * no more static, because must be called from vx_pcm to demute monitoring
 */
int vx_set_monitor_level(struct vx_core *chip, int audio, int level, int active)
{
        struct vx_audio_level info;

        memset(&info, 0, sizeof(info));
        info.has_monitor_level = 1;
        info.monitor_level = level;
        info.has_monitor_mute = 1;
        info.monitor_mute = !active;
        chip->audio_monitor[audio] = level;
        chip->audio_monitor_active[audio] = active;
        return vx_adjust_audio_level(chip, audio, 0, &info); /* playback only */
}


/*
 * set the mute status of the given audio
 */
static int vx_set_audio_switch(struct vx_core *chip, int audio, int active)
{
        struct vx_audio_level info;

        memset(&info, 0, sizeof(info));
        info.has_mute = 1;
        info.mute = !active;
        chip->audio_active[audio] = active;
        return vx_adjust_audio_level(chip, audio, 0, &info); /* playback only */
}

/*
 * set the mute status of the given audio
 */
static int vx_set_audio_gain(struct vx_core *chip, int audio, int capture, int level)
{
        struct vx_audio_level info;

        memset(&info, 0, sizeof(info));
        info.has_level = 1;
        info.level = level;
        chip->audio_gain[capture][audio] = level;
        return vx_adjust_audio_level(chip, audio, capture, &info);
}

/*
 * reset all audio levels
 */
static void vx_reset_audio_levels(struct vx_core *chip)
{
        unsigned int i, c;
        struct vx_audio_level info;

        memset(chip->audio_gain, 0, sizeof(chip->audio_gain));
        memset(chip->audio_active, 0, sizeof(chip->audio_active));
        memset(chip->audio_monitor, 0, sizeof(chip->audio_monitor));
        memset(chip->audio_monitor_active, 0, sizeof(chip->audio_monitor_active));

        for (c = 0; c < 2; c++) {
                for (i = 0; i < chip->hw->num_ins * 2; i++) {
                        memset(&info, 0, sizeof(info));
                        if (c == 0) {
                                info.has_monitor_level = 1;
                                info.has_mute = 1;
                                info.has_monitor_mute = 1;
                        }
                        info.has_level = 1;
                        info.level = CVAL_0DB; /* default: 0dB */
                        vx_adjust_audio_level(chip, i, c, &info);
                        chip->audio_gain[c][i] = CVAL_0DB;
                        chip->audio_monitor[i] = CVAL_0DB;
                }
        }
}


/*
 * VU, peak meter record
 */

#define VU_METER_CHANNELS       2

struct vx_vu_meter {
        int saturated;
        int vu_level;
        int peak_level;
};

/*
 * get the VU and peak meter values
 * @audio: the audio index
 * @capture: 0 = playback, 1 = capture operation
 * @info: the array of vx_vu_meter records (size = 2).
 */
static int vx_get_audio_vu_meter(struct vx_core *chip, int audio, int capture, struct vx_vu_meter *info)
{
        struct vx_rmh rmh;
        int i, err;

        if (chip->chip_status & VX_STAT_IS_STALE)
                return -EBUSY;

        vx_init_rmh(&rmh, CMD_AUDIO_VU_PIC_METER);
        rmh.LgStat += 2 * VU_METER_CHANNELS;
        if (capture)
                rmh.Cmd[0] |= COMMAND_RECORD_MASK;
    
        /* Add Audio IO mask */
        rmh.Cmd[1] = 0;
        for (i = 0; i < VU_METER_CHANNELS; i++)
                rmh.Cmd[1] |= 1 << (audio + i);
        err = vx_send_msg(chip, &rmh);
        if (err < 0)
                return err;
        /* Read response */
        for (i = 0; i < 2 * VU_METER_CHANNELS; i +=2) {
                info->saturated = (rmh.Stat[0] & (1 << (audio + i))) ? 1 : 0;
                info->vu_level = rmh.Stat[i + 1];
                info->peak_level = rmh.Stat[i + 2];
                info++;
        }
        return 0;
}
   

/*
 * control API entries
 */

/*
 * output level control
 */
static int vx_output_level_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = 2;
        uinfo->value.integer.min = 0;
        uinfo->value.integer.max = chip->hw->output_level_max;
        return 0;
}

static int vx_output_level_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        int codec = kcontrol->id.index;
        mutex_lock(&chip->mixer_mutex);
        ucontrol->value.integer.value[0] = chip->output_level[codec][0];
        ucontrol->value.integer.value[1] = chip->output_level[codec][1];
        mutex_unlock(&chip->mixer_mutex);
        return 0;
}

static int vx_output_level_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        int codec = kcontrol->id.index;
        unsigned int val[2], vmax;

        vmax = chip->hw->output_level_max;
        val[0] = ucontrol->value.integer.value[0];
        val[1] = ucontrol->value.integer.value[1];
        if (val[0] > vmax || val[1] > vmax)
                return -EINVAL;
        mutex_lock(&chip->mixer_mutex);
        if (val[0] != chip->output_level[codec][0] ||
            val[1] != chip->output_level[codec][1]) {
                vx_set_analog_output_level(chip, codec, val[0], val[1]);
                chip->output_level[codec][0] = val[0];
                chip->output_level[codec][1] = val[1];
                mutex_unlock(&chip->mixer_mutex);
                return 1;
        }
        mutex_unlock(&chip->mixer_mutex);
        return 0;
}

static struct snd_kcontrol_new vx_control_output_level = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .access =       (SNDRV_CTL_ELEM_ACCESS_READWRITE |
                         SNDRV_CTL_ELEM_ACCESS_TLV_READ),
        .name =         "Master Playback Volume",
        .info =         vx_output_level_info,
        .get =          vx_output_level_get,
        .put =          vx_output_level_put,
        /* tlv will be filled later */
};

/*
 * audio source select
 */
static int vx_audio_src_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
        static const char * const texts_mic[3] = {
                "Digital", "Line", "Mic"
        };
        static const char * const texts_vx2[2] = {
                "Digital", "Analog"
        };
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);

        if (chip->type >= VX_TYPE_VXPOCKET)
                return snd_ctl_enum_info(uinfo, 1, 3, texts_mic);
        else
                return snd_ctl_enum_info(uinfo, 1, 2, texts_vx2);
}

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

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

        if (chip->type >= VX_TYPE_VXPOCKET) {
                if (ucontrol->value.enumerated.item[0] > 2)
                        return -EINVAL;
        } else {
                if (ucontrol->value.enumerated.item[0] > 1)
                        return -EINVAL;
        }
        mutex_lock(&chip->mixer_mutex);
        if (chip->audio_source_target != ucontrol->value.enumerated.item[0]) {
                chip->audio_source_target = ucontrol->value.enumerated.item[0];
                vx_sync_audio_source(chip);
                mutex_unlock(&chip->mixer_mutex);
                return 1;
        }
        mutex_unlock(&chip->mixer_mutex);
        return 0;
}

static struct snd_kcontrol_new vx_control_audio_src = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "Capture Source",
        .info =         vx_audio_src_info,
        .get =          vx_audio_src_get,
        .put =          vx_audio_src_put,
};

/*
 * clock mode selection
 */
static int vx_clock_mode_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
        static const char * const texts[3] = {
                "Auto", "Internal", "External"
        };

        return snd_ctl_enum_info(uinfo, 1, 3, texts);
}

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

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

        if (ucontrol->value.enumerated.item[0] > 2)
                return -EINVAL;
        mutex_lock(&chip->mixer_mutex);
        if (chip->clock_mode != ucontrol->value.enumerated.item[0]) {
                chip->clock_mode = ucontrol->value.enumerated.item[0];
                vx_set_clock(chip, chip->freq);
                mutex_unlock(&chip->mixer_mutex);
                return 1;
        }
        mutex_unlock(&chip->mixer_mutex);
        return 0;
}

static struct snd_kcontrol_new vx_control_clock_mode = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "Clock Mode",
        .info =         vx_clock_mode_info,
        .get =          vx_clock_mode_get,
        .put =          vx_clock_mode_put,
};

/*
 * Audio Gain
 */
static int vx_audio_gain_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 = 0;
        uinfo->value.integer.max = CVAL_MAX;
        return 0;
}

static int vx_audio_gain_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        int audio = kcontrol->private_value & 0xff;
        int capture = (kcontrol->private_value >> 8) & 1;

        mutex_lock(&chip->mixer_mutex);
        ucontrol->value.integer.value[0] = chip->audio_gain[capture][audio];
        ucontrol->value.integer.value[1] = chip->audio_gain[capture][audio+1];
        mutex_unlock(&chip->mixer_mutex);
        return 0;
}

static int vx_audio_gain_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        int audio = kcontrol->private_value & 0xff;
        int capture = (kcontrol->private_value >> 8) & 1;
        unsigned int val[2];

        val[0] = ucontrol->value.integer.value[0];
        val[1] = ucontrol->value.integer.value[1];
        if (val[0] > CVAL_MAX || val[1] > CVAL_MAX)
                return -EINVAL;
        mutex_lock(&chip->mixer_mutex);
        if (val[0] != chip->audio_gain[capture][audio] ||
            val[1] != chip->audio_gain[capture][audio+1]) {
                vx_set_audio_gain(chip, audio, capture, val[0]);
                vx_set_audio_gain(chip, audio+1, capture, val[1]);
                mutex_unlock(&chip->mixer_mutex);
                return 1;
        }
        mutex_unlock(&chip->mixer_mutex);
        return 0;
}

static int vx_audio_monitor_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        int audio = kcontrol->private_value & 0xff;

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

static int vx_audio_monitor_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        int audio = kcontrol->private_value & 0xff;
        unsigned int val[2];

        val[0] = ucontrol->value.integer.value[0];
        val[1] = ucontrol->value.integer.value[1];
        if (val[0] > CVAL_MAX || val[1] > CVAL_MAX)
                return -EINVAL;

        mutex_lock(&chip->mixer_mutex);
        if (val[0] != chip->audio_monitor[audio] ||
            val[1] != chip->audio_monitor[audio+1]) {
                vx_set_monitor_level(chip, audio, val[0],
                                     chip->audio_monitor_active[audio]);
                vx_set_monitor_level(chip, audio+1, val[1],
                                     chip->audio_monitor_active[audio+1]);
                mutex_unlock(&chip->mixer_mutex);
                return 1;
        }
        mutex_unlock(&chip->mixer_mutex);
        return 0;
}

#define vx_audio_sw_info        snd_ctl_boolean_stereo_info

static int vx_audio_sw_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        int audio = kcontrol->private_value & 0xff;

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

static int vx_audio_sw_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        int audio = kcontrol->private_value & 0xff;

        mutex_lock(&chip->mixer_mutex);
        if (ucontrol->value.integer.value[0] != chip->audio_active[audio] ||
            ucontrol->value.integer.value[1] != chip->audio_active[audio+1]) {
                vx_set_audio_switch(chip, audio,
                                    !!ucontrol->value.integer.value[0]);
                vx_set_audio_switch(chip, audio+1,
                                    !!ucontrol->value.integer.value[1]);
                mutex_unlock(&chip->mixer_mutex);
                return 1;
        }
        mutex_unlock(&chip->mixer_mutex);
        return 0;
}

static int vx_monitor_sw_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        int audio = kcontrol->private_value & 0xff;

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

static int vx_monitor_sw_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        int audio = kcontrol->private_value & 0xff;

        mutex_lock(&chip->mixer_mutex);
        if (ucontrol->value.integer.value[0] != chip->audio_monitor_active[audio] ||
            ucontrol->value.integer.value[1] != chip->audio_monitor_active[audio+1]) {
                vx_set_monitor_level(chip, audio, chip->audio_monitor[audio],
                                     !!ucontrol->value.integer.value[0]);
                vx_set_monitor_level(chip, audio+1, chip->audio_monitor[audio+1],
                                     !!ucontrol->value.integer.value[1]);
                mutex_unlock(&chip->mixer_mutex);
                return 1;
        }
        mutex_unlock(&chip->mixer_mutex);
        return 0;
}

static const DECLARE_TLV_DB_SCALE(db_scale_audio_gain, -10975, 25, 0);

static struct snd_kcontrol_new vx_control_audio_gain = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .access =       (SNDRV_CTL_ELEM_ACCESS_READWRITE |
                         SNDRV_CTL_ELEM_ACCESS_TLV_READ),
        /* name will be filled later */
        .info =         vx_audio_gain_info,
        .get =          vx_audio_gain_get,
        .put =          vx_audio_gain_put,
        .tlv = { .p = db_scale_audio_gain },
};
static struct snd_kcontrol_new vx_control_output_switch = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "PCM Playback Switch",
        .info =         vx_audio_sw_info,
        .get =          vx_audio_sw_get,
        .put =          vx_audio_sw_put
};
static struct snd_kcontrol_new vx_control_monitor_gain = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "Monitoring Volume",
        .access =       (SNDRV_CTL_ELEM_ACCESS_READWRITE |
                         SNDRV_CTL_ELEM_ACCESS_TLV_READ),
        .info =         vx_audio_gain_info,     /* shared */
        .get =          vx_audio_monitor_get,
        .put =          vx_audio_monitor_put,
        .tlv = { .p = db_scale_audio_gain },
};
static struct snd_kcontrol_new vx_control_monitor_switch = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "Monitoring Switch",
        .info =         vx_audio_sw_info,       /* shared */
        .get =          vx_monitor_sw_get,
        .put =          vx_monitor_sw_put
};


/*
 * IEC958 status bits
 */
static int vx_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 vx_iec958_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);

        mutex_lock(&chip->mixer_mutex);
        ucontrol->value.iec958.status[0] = (chip->uer_bits >> 0) & 0xff;
        ucontrol->value.iec958.status[1] = (chip->uer_bits >> 8) & 0xff;
        ucontrol->value.iec958.status[2] = (chip->uer_bits >> 16) & 0xff;
        ucontrol->value.iec958.status[3] = (chip->uer_bits >> 24) & 0xff;
        mutex_unlock(&chip->mixer_mutex);
        return 0;
}

static int vx_iec958_mask_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *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 vx_iec958_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        unsigned int val;

        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);
        mutex_lock(&chip->mixer_mutex);
        if (chip->uer_bits != val) {
                chip->uer_bits = val;
                vx_set_iec958_status(chip, val);
                mutex_unlock(&chip->mixer_mutex);
                return 1;
        }
        mutex_unlock(&chip->mixer_mutex);
        return 0;
}

static struct snd_kcontrol_new vx_control_iec958_mask = {
        .access =       SNDRV_CTL_ELEM_ACCESS_READ,
        .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
        .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
        .info =         vx_iec958_info, /* shared */
        .get =          vx_iec958_mask_get,
};

static struct snd_kcontrol_new vx_control_iec958 = {
        .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
        .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
        .info =         vx_iec958_info,
        .get =          vx_iec958_get,
        .put =          vx_iec958_put
};


/*
 * VU meter
 */

#define METER_MAX       0xff
#define METER_SHIFT     16

static int vx_vu_meter_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 = 0;
        uinfo->value.integer.max = METER_MAX;
        return 0;
}

static int vx_vu_meter_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        struct vx_vu_meter meter[2];
        int audio = kcontrol->private_value & 0xff;
        int capture = (kcontrol->private_value >> 8) & 1;

        vx_get_audio_vu_meter(chip, audio, capture, meter);
        ucontrol->value.integer.value[0] = meter[0].vu_level >> METER_SHIFT;
        ucontrol->value.integer.value[1] = meter[1].vu_level >> METER_SHIFT;
        return 0;
}

static int vx_peak_meter_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        struct vx_vu_meter meter[2];
        int audio = kcontrol->private_value & 0xff;
        int capture = (kcontrol->private_value >> 8) & 1;

        vx_get_audio_vu_meter(chip, audio, capture, meter);
        ucontrol->value.integer.value[0] = meter[0].peak_level >> METER_SHIFT;
        ucontrol->value.integer.value[1] = meter[1].peak_level >> METER_SHIFT;
        return 0;
}

#define vx_saturation_info      snd_ctl_boolean_stereo_info

static int vx_saturation_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct vx_core *chip = snd_kcontrol_chip(kcontrol);
        struct vx_vu_meter meter[2];
        int audio = kcontrol->private_value & 0xff;

        vx_get_audio_vu_meter(chip, audio, 1, meter); /* capture only */
        ucontrol->value.integer.value[0] = meter[0].saturated;
        ucontrol->value.integer.value[1] = meter[1].saturated;
        return 0;
}

static struct snd_kcontrol_new vx_control_vu_meter = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
        /* name will be filled later */
        .info =         vx_vu_meter_info,
        .get =          vx_vu_meter_get,
};

static struct snd_kcontrol_new vx_control_peak_meter = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
        /* name will be filled later */
        .info =         vx_vu_meter_info,       /* shared */
        .get =          vx_peak_meter_get,
};

static struct snd_kcontrol_new vx_control_saturation = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "Input Saturation",
        .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
        .info =         vx_saturation_info,
        .get =          vx_saturation_get,
};



/*
 *
 */

int snd_vx_mixer_new(struct vx_core *chip)
{
        unsigned int i, c;
        int err;
        struct snd_kcontrol_new temp;
        struct snd_card *card = chip->card;
        char name[32];

        strcpy(card->mixername, card->driver);

        /* output level controls */
        for (i = 0; i < chip->hw->num_outs; i++) {
                temp = vx_control_output_level;
                temp.index = i;
                temp.tlv.p = chip->hw->output_level_db_scale;
                if ((err = snd_ctl_add(card, snd_ctl_new1(&temp, chip))) < 0)
                        return err;
        }

        /* PCM volumes, switches, monitoring */
        for (i = 0; i < chip->hw->num_outs; i++) {
                int val = i * 2;
                temp = vx_control_audio_gain;
                temp.index = i;
                temp.name = "PCM Playback Volume";
                temp.private_value = val;
                if ((err = snd_ctl_add(card, snd_ctl_new1(&temp, chip))) < 0)
                        return err;
                temp = vx_control_output_switch;
                temp.index = i;
                temp.private_value = val;
                if ((err = snd_ctl_add(card, snd_ctl_new1(&temp, chip))) < 0)
                        return err;
                temp = vx_control_monitor_gain;
                temp.index = i;
                temp.private_value = val;
                if ((err = snd_ctl_add(card, snd_ctl_new1(&temp, chip))) < 0)
                        return err;
                temp = vx_control_monitor_switch;
                temp.index = i;
                temp.private_value = val;
                if ((err = snd_ctl_add(card, snd_ctl_new1(&temp, chip))) < 0)
                        return err;
        }
        for (i = 0; i < chip->hw->num_outs; i++) {
                temp = vx_control_audio_gain;
                temp.index = i;
                temp.name = "PCM Capture Volume";
                temp.private_value = (i * 2) | (1 << 8);
                if ((err = snd_ctl_add(card, snd_ctl_new1(&temp, chip))) < 0)
                        return err;
        }

        /* Audio source */
        if ((err = snd_ctl_add(card, snd_ctl_new1(&vx_control_audio_src, chip))) < 0)
                return err;
        /* clock mode */
        if ((err = snd_ctl_add(card, snd_ctl_new1(&vx_control_clock_mode, chip))) < 0)
                return err;
        /* IEC958 controls */
        if ((err = snd_ctl_add(card, snd_ctl_new1(&vx_control_iec958_mask, chip))) < 0)
                return err;
        if ((err = snd_ctl_add(card, snd_ctl_new1(&vx_control_iec958, chip))) < 0)
                return err;
        /* VU, peak, saturation meters */
        for (c = 0; c < 2; c++) {
                static char *dir[2] = { "Output", "Input" };
                for (i = 0; i < chip->hw->num_ins; i++) {
                        int val = (i * 2) | (c << 8);
                        if (c == 1) {
                                temp = vx_control_saturation;
                                temp.index = i;
                                temp.private_value = val;
                                if ((err = snd_ctl_add(card, snd_ctl_new1(&temp, chip))) < 0)
                                        return err;
                        }
                        sprintf(name, "%s VU Meter", dir[c]);
                        temp = vx_control_vu_meter;
                        temp.index = i;
                        temp.name = name;
                        temp.private_value = val;
                        if ((err = snd_ctl_add(card, snd_ctl_new1(&temp, chip))) < 0)
                                return err;
                        sprintf(name, "%s Peak Meter", dir[c]);
                        temp = vx_control_peak_meter;
                        temp.index = i;
                        temp.name = name;
                        temp.private_value = val;
                        if ((err = snd_ctl_add(card, snd_ctl_new1(&temp, chip))) < 0)
                                return err;

                }
        }
        vx_reset_audio_levels(chip);
        return 0;
}