vxp_mixer.c

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/*
 * Driver for Digigram VXpocket soundcards
 *
 * VX-pocket mixer
 *
 * Copyright (c) 2002 by Takashi Iwai <[email protected]>
 *
 *   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 "vxpocket.h"

#define MIC_LEVEL_MIN   0
#define MIC_LEVEL_MAX   8

/*
 * mic level control (for VXPocket)
 */
static int vx_mic_level_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
    uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
    uinfo->count = 1;
    uinfo->value.integer.min = 0;
    uinfo->value.integer.max = MIC_LEVEL_MAX;
    return 0;
}

static int vx_mic_level_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct vx_core *_chip = snd_kcontrol_chip(kcontrol);
    struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
    ucontrol->value.integer.value[0] = chip->mic_level;
    return 0;
}

static int vx_mic_level_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct vx_core *_chip = snd_kcontrol_chip(kcontrol);
    struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
    unsigned int val = ucontrol->value.integer.value[0];

    if (val > MIC_LEVEL_MAX)
        return -EINVAL;
    mutex_lock(&_chip->mixer_mutex);
    if (chip->mic_level != ucontrol->value.integer.value[0]) {
        vx_set_mic_level(_chip, ucontrol->value.integer.value[0]);
        chip->mic_level = ucontrol->value.integer.value[0];
        mutex_unlock(&_chip->mixer_mutex);
        return 1;
    }
    mutex_unlock(&_chip->mixer_mutex);
    return 0;
}

static const DECLARE_TLV_DB_SCALE(db_scale_mic, -21, 3, 0);

static struct snd_kcontrol_new vx_control_mic_level = {
    .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
    .access =   (SNDRV_CTL_ELEM_ACCESS_READWRITE |
             SNDRV_CTL_ELEM_ACCESS_TLV_READ),
    .name =     "Mic Capture Volume",
    .info =     vx_mic_level_info,
    .get =      vx_mic_level_get,
    .put =      vx_mic_level_put,
    .tlv = { .p = db_scale_mic },
};

/*
 * mic boost level control (for VXP440)
 */
#define vx_mic_boost_info       snd_ctl_boolean_mono_info

static int vx_mic_boost_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct vx_core *_chip = snd_kcontrol_chip(kcontrol);
    struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
    ucontrol->value.integer.value[0] = chip->mic_level;
    return 0;
}

static int vx_mic_boost_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct vx_core *_chip = snd_kcontrol_chip(kcontrol);
    struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
    int val = !!ucontrol->value.integer.value[0];
    mutex_lock(&_chip->mixer_mutex);
    if (chip->mic_level != val) {
        vx_set_mic_boost(_chip, val);
        chip->mic_level = val;
        mutex_unlock(&_chip->mixer_mutex);
        return 1;
    }
    mutex_unlock(&_chip->mixer_mutex);
    return 0;
}

static struct snd_kcontrol_new vx_control_mic_boost = {
    .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
    .name =     "Mic Boost",
    .info =     vx_mic_boost_info,
    .get =      vx_mic_boost_get,
    .put =      vx_mic_boost_put,
};


int vxp_add_mic_controls(struct vx_core *_chip)
{
    struct snd_vxpocket *chip = (struct snd_vxpocket *)_chip;
    int err;

    /* mute input levels */
    chip->mic_level = 0;
    switch (_chip->type) {
    case VX_TYPE_VXPOCKET:
        vx_set_mic_level(_chip, 0);
        break;
    case VX_TYPE_VXP440:
        vx_set_mic_boost(_chip, 0);
        break;
    }

    /* mic level */
    switch (_chip->type) {
    case VX_TYPE_VXPOCKET:
        if ((err = snd_ctl_add(_chip->card, snd_ctl_new1(&vx_control_mic_level, chip))) < 0)
            return err;
        break;
    case VX_TYPE_VXP440:
        if ((err = snd_ctl_add(_chip->card, snd_ctl_new1(&vx_control_mic_boost, chip))) < 0)
            return err;
        break;
    }

    return 0;
}