// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
 *
 * @File        ctmixer.c
 *
 * @Brief
 * This file contains the implementation of alsa mixer device functions.
 *
 * @Author      Liu Chun
 * @Date        May 28 2008
 */


#include "ctmixer.h"
#include "ctamixer.h"
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/asoundef.h>
#include <sound/pcm.h>
#include <sound/tlv.h>

enum CT_SUM_CTL {
        SUM_IN_F,
        SUM_IN_R,
        SUM_IN_C,
        SUM_IN_S,
        SUM_IN_F_C,

        NUM_CT_SUMS
};

enum CT_AMIXER_CTL {
        /* volume control mixers */
        AMIXER_MASTER_F,
        AMIXER_MASTER_R,
        AMIXER_MASTER_C,
        AMIXER_MASTER_S,
        AMIXER_PCM_F,
        AMIXER_PCM_R,
        AMIXER_PCM_C,
        AMIXER_PCM_S,
        AMIXER_SPDIFI,
        AMIXER_LINEIN,
        AMIXER_MIC,
        AMIXER_SPDIFO,
        AMIXER_WAVE_F,
        AMIXER_WAVE_R,
        AMIXER_WAVE_C,
        AMIXER_WAVE_S,
        AMIXER_MASTER_F_C,
        AMIXER_PCM_F_C,
        AMIXER_SPDIFI_C,
        AMIXER_LINEIN_C,
        AMIXER_MIC_C,

        /* this should always be the last one */
        NUM_CT_AMIXERS
};

enum CTALSA_MIXER_CTL {
        /* volume control mixers */
        MIXER_MASTER_P,
        MIXER_PCM_P,
        MIXER_LINEIN_P,
        MIXER_MIC_P,
        MIXER_SPDIFI_P,
        MIXER_SPDIFO_P,
        MIXER_WAVEF_P,
        MIXER_WAVER_P,
        MIXER_WAVEC_P,
        MIXER_WAVES_P,
        MIXER_MASTER_C,
        MIXER_PCM_C,
        MIXER_LINEIN_C,
        MIXER_MIC_C,
        MIXER_SPDIFI_C,

        /* switch control mixers */
        MIXER_PCM_C_S,
        MIXER_LINEIN_C_S,
        MIXER_MIC_C_S,
        MIXER_SPDIFI_C_S,
        MIXER_SPDIFO_P_S,
        MIXER_WAVEF_P_S,
        MIXER_WAVER_P_S,
        MIXER_WAVEC_P_S,
        MIXER_WAVES_P_S,
        MIXER_DIGITAL_IO_S,
        MIXER_IEC958_MASK,
        MIXER_IEC958_DEFAULT,
        MIXER_IEC958_STREAM,

        /* this should always be the last one */
        NUM_CTALSA_MIXERS
};

#define VOL_MIXER_START         MIXER_MASTER_P
#define VOL_MIXER_END           MIXER_SPDIFI_C
#define VOL_MIXER_NUM           (VOL_MIXER_END - VOL_MIXER_START + 1)
#define SWH_MIXER_START         MIXER_PCM_C_S
#define SWH_MIXER_END           MIXER_DIGITAL_IO_S
#define SWH_CAPTURE_START       MIXER_PCM_C_S
#define SWH_CAPTURE_END         MIXER_SPDIFI_C_S

#define CHN_NUM         2

struct ct_kcontrol_init {
        unsigned char ctl;
        char *name;
};

static struct ct_kcontrol_init
ct_kcontrol_init_table[NUM_CTALSA_MIXERS] = {
        [MIXER_MASTER_P] = {
                .ctl = 1,
                .name = "Master Playback Volume",
        },
        [MIXER_MASTER_C] = {
                .ctl = 1,
                .name = "Master Capture Volume",
        },
        [MIXER_PCM_P] = {
                .ctl = 1,
                .name = "PCM Playback Volume",
        },
        [MIXER_PCM_C] = {
                .ctl = 1,
                .name = "PCM Capture Volume",
        },
        [MIXER_LINEIN_P] = {
                .ctl = 1,
                .name = "Line Playback Volume",
        },
        [MIXER_LINEIN_C] = {
                .ctl = 1,
                .name = "Line Capture Volume",
        },
        [MIXER_MIC_P] = {
                .ctl = 1,
                .name = "Mic Playback Volume",
        },
        [MIXER_MIC_C] = {
                .ctl = 1,
                .name = "Mic Capture Volume",
        },
        [MIXER_SPDIFI_P] = {
                .ctl = 1,
                .name = "IEC958 Playback Volume",
        },
        [MIXER_SPDIFI_C] = {
                .ctl = 1,
                .name = "IEC958 Capture Volume",
        },
        [MIXER_SPDIFO_P] = {
                .ctl = 1,
                .name = "Digital Playback Volume",
        },
        [MIXER_WAVEF_P] = {
                .ctl = 1,
                .name = "Front Playback Volume",
        },
        [MIXER_WAVES_P] = {
                .ctl = 1,
                .name = "Side Playback Volume",
        },
        [MIXER_WAVEC_P] = {
                .ctl = 1,
                .name = "Center/LFE Playback Volume",
        },
        [MIXER_WAVER_P] = {
                .ctl = 1,
                .name = "Surround Playback Volume",
        },
        [MIXER_PCM_C_S] = {
                .ctl = 1,
                .name = "PCM Capture Switch",
        },
        [MIXER_LINEIN_C_S] = {
                .ctl = 1,
                .name = "Line Capture Switch",
        },
        [MIXER_MIC_C_S] = {
                .ctl = 1,
                .name = "Mic Capture Switch",
        },
        [MIXER_SPDIFI_C_S] = {
                .ctl = 1,
                .name = "IEC958 Capture Switch",
        },
        [MIXER_SPDIFO_P_S] = {
                .ctl = 1,
                .name = "Digital Playback Switch",
        },
        [MIXER_WAVEF_P_S] = {
                .ctl = 1,
                .name = "Front Playback Switch",
        },
        [MIXER_WAVES_P_S] = {
                .ctl = 1,
                .name = "Side Playback Switch",
        },
        [MIXER_WAVEC_P_S] = {
                .ctl = 1,
                .name = "Center/LFE Playback Switch",
        },
        [MIXER_WAVER_P_S] = {
                .ctl = 1,
                .name = "Surround Playback Switch",
        },
        [MIXER_DIGITAL_IO_S] = {
                .ctl = 0,
                .name = "Digit-IO Playback Switch",
        },
};

static void
ct_mixer_recording_select(struct ct_mixer *mixer, enum CT_AMIXER_CTL type);

static void
ct_mixer_recording_unselect(struct ct_mixer *mixer, enum CT_AMIXER_CTL type);

/* FIXME: this static looks like it would fail if more than one card was */
/* installed. */
static struct snd_kcontrol *kctls[2] = {NULL};

static enum CT_AMIXER_CTL get_amixer_index(enum CTALSA_MIXER_CTL alsa_index)
{
        switch (alsa_index) {
        case MIXER_MASTER_P:    return AMIXER_MASTER_F;
        case MIXER_MASTER_C:    return AMIXER_MASTER_F_C;
        case MIXER_PCM_P:       return AMIXER_PCM_F;
        case MIXER_PCM_C:
        case MIXER_PCM_C_S:     return AMIXER_PCM_F_C;
        case MIXER_LINEIN_P:    return AMIXER_LINEIN;
        case MIXER_LINEIN_C:
        case MIXER_LINEIN_C_S:  return AMIXER_LINEIN_C;
        case MIXER_MIC_P:       return AMIXER_MIC;
        case MIXER_MIC_C:
        case MIXER_MIC_C_S:     return AMIXER_MIC_C;
        case MIXER_SPDIFI_P:    return AMIXER_SPDIFI;
        case MIXER_SPDIFI_C:
        case MIXER_SPDIFI_C_S:  return AMIXER_SPDIFI_C;
        case MIXER_SPDIFO_P:    return AMIXER_SPDIFO;
        case MIXER_WAVEF_P:     return AMIXER_WAVE_F;
        case MIXER_WAVES_P:     return AMIXER_WAVE_S;
        case MIXER_WAVEC_P:     return AMIXER_WAVE_C;
        case MIXER_WAVER_P:     return AMIXER_WAVE_R;
        default:                return NUM_CT_AMIXERS;
        }
}

static enum CT_AMIXER_CTL get_recording_amixer(enum CT_AMIXER_CTL index)
{
        switch (index) {
        case AMIXER_MASTER_F:   return AMIXER_MASTER_F_C;
        case AMIXER_PCM_F:      return AMIXER_PCM_F_C;
        case AMIXER_SPDIFI:     return AMIXER_SPDIFI_C;
        case AMIXER_LINEIN:     return AMIXER_LINEIN_C;
        case AMIXER_MIC:        return AMIXER_MIC_C;
        default:                return NUM_CT_AMIXERS;
        }
}

static unsigned char
get_switch_state(struct ct_mixer *mixer, enum CTALSA_MIXER_CTL type)
{
        return (mixer->switch_state & (0x1 << (type - SWH_MIXER_START)))
                ? 1 : 0;
}

static void
set_switch_state(struct ct_mixer *mixer,
                 enum CTALSA_MIXER_CTL type, unsigned char state)
{
        if (state)
                mixer->switch_state |= (0x1 << (type - SWH_MIXER_START));
        else
                mixer->switch_state &= ~(0x1 << (type - SWH_MIXER_START));
}

#if 0 /* not used */
/* Map integer value ranging from 0 to 65535 to 14-bit float value ranging
 * from 2^-6 to (1+1023/1024) */
static unsigned int uint16_to_float14(unsigned int x)
{
        unsigned int i;

        if (x < 17)
                return 0;

        x *= 2031;
        x /= 65535;
        x += 16;

        /* i <= 6 */
        for (i = 0; !(x & 0x400); i++)
                x <<= 1;

        x = (((7 - i) & 0x7) << 10) | (x & 0x3ff);

        return x;
}

static unsigned int float14_to_uint16(unsigned int x)
{
        unsigned int e;

        if (!x)
                return x;

        e = (x >> 10) & 0x7;
        x &= 0x3ff;
        x += 1024;
        x >>= (7 - e);
        x -= 16;
        x *= 65535;
        x /= 2031;

        return x;
}
#endif /* not used */

#define VOL_SCALE       0x1c
#define VOL_MAX         0x100

static const DECLARE_TLV_DB_SCALE(ct_vol_db_scale, -6400, 25, 1);

static int ct_alsa_mix_volume_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 = VOL_MAX;

        return 0;
}

static int ct_alsa_mix_volume_get(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
{
        struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
        enum CT_AMIXER_CTL type = get_amixer_index(kcontrol->private_value);
        struct amixer *amixer;
        int i, val;

        for (i = 0; i < 2; i++) {
                amixer = ((struct ct_mixer *)atc->mixer)->
                                                amixers[type*CHN_NUM+i];
                val = amixer->ops->get_scale(amixer) / VOL_SCALE;
                if (val < 0)
                        val = 0;
                else if (val > VOL_MAX)
                        val = VOL_MAX;
                ucontrol->value.integer.value[i] = val;
        }

        return 0;
}

static int ct_alsa_mix_volume_put(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
{
        struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
        struct ct_mixer *mixer = atc->mixer;
        enum CT_AMIXER_CTL type = get_amixer_index(kcontrol->private_value);
        struct amixer *amixer;
        int i, j, val, oval, change = 0;

        for (i = 0; i < 2; i++) {
                val = ucontrol->value.integer.value[i];
                if (val < 0)
                        val = 0;
                else if (val > VOL_MAX)
                        val = VOL_MAX;
                val *= VOL_SCALE;
                amixer = mixer->amixers[type*CHN_NUM+i];
                oval = amixer->ops->get_scale(amixer);
                if (val != oval) {
                        amixer->ops->set_scale(amixer, val);
                        amixer->ops->commit_write(amixer);
                        change = 1;
                        /* Synchronize Master/PCM playback AMIXERs. */
                        if (AMIXER_MASTER_F == type || AMIXER_PCM_F == type) {
                                for (j = 1; j < 4; j++) {
                                        amixer = mixer->
                                                amixers[(type+j)*CHN_NUM+i];
                                        amixer->ops->set_scale(amixer, val);
                                        amixer->ops->commit_write(amixer);
                                }
                        }
                }
        }

        return change;
}

static struct snd_kcontrol_new vol_ctl = {
        .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE |
                          SNDRV_CTL_ELEM_ACCESS_TLV_READ,
        .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
        .info           = ct_alsa_mix_volume_info,
        .get            = ct_alsa_mix_volume_get,
        .put            = ct_alsa_mix_volume_put,
        .tlv            = { .p =  ct_vol_db_scale },
};

static int output_switch_info(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_info *info)
{
        static const char *const names[3] = {
          "FP Headphones", "Headphones", "Speakers"
        };

        return snd_ctl_enum_info(info, 1, 3, names);
}

static int output_switch_get(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_value *ucontrol)
{
        struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
        ucontrol->value.enumerated.item[0] = atc->output_switch_get(atc);
        return 0;
}

static int output_switch_put(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_value *ucontrol)
{
        struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
        if (ucontrol->value.enumerated.item[0] > 2)
                return -EINVAL;
        return atc->output_switch_put(atc, ucontrol->value.enumerated.item[0]);
}

static struct snd_kcontrol_new output_ctl = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Analog Output Playback Enum",
        .info = output_switch_info,
        .get = output_switch_get,
        .put = output_switch_put,
};

static int mic_source_switch_info(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_info *info)
{
        static const char *const names[3] = {
          "Mic", "FP Mic", "Aux"
        };

        return snd_ctl_enum_info(info, 1, 3, names);
}

static int mic_source_switch_get(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_value *ucontrol)
{
        struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
        ucontrol->value.enumerated.item[0] = atc->mic_source_switch_get(atc);
        return 0;
}

static int mic_source_switch_put(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_value *ucontrol)
{
        struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
        if (ucontrol->value.enumerated.item[0] > 2)
                return -EINVAL;
        return atc->mic_source_switch_put(atc,
                                        ucontrol->value.enumerated.item[0]);
}

static struct snd_kcontrol_new mic_source_ctl = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Mic Source Capture Enum",
        .info = mic_source_switch_info,
        .get = mic_source_switch_get,
        .put = mic_source_switch_put,
};

static void
do_line_mic_switch(struct ct_atc *atc, enum CTALSA_MIXER_CTL type)
{

        if (MIXER_LINEIN_C_S == type) {
                atc->select_line_in(atc);
                set_switch_state(atc->mixer, MIXER_MIC_C_S, 0);
                snd_ctl_notify(atc->card, SNDRV_CTL_EVENT_MASK_VALUE,
                                                        &kctls[1]->id);
        } else if (MIXER_MIC_C_S == type) {
                atc->select_mic_in(atc);
                set_switch_state(atc->mixer, MIXER_LINEIN_C_S, 0);
                snd_ctl_notify(atc->card, SNDRV_CTL_EVENT_MASK_VALUE,
                                                        &kctls[0]->id);
        }
}

static void
do_digit_io_switch(struct ct_atc *atc, int state)
{
        struct ct_mixer *mixer = atc->mixer;

        if (state) {
                atc->select_digit_io(atc);
                atc->spdif_out_unmute(atc,
                                get_switch_state(mixer, MIXER_SPDIFO_P_S));
                atc->spdif_in_unmute(atc, 1);
                atc->line_in_unmute(atc, 0);
                return;
        }

        if (get_switch_state(mixer, MIXER_LINEIN_C_S))
                atc->select_line_in(atc);
        else if (get_switch_state(mixer, MIXER_MIC_C_S))
                atc->select_mic_in(atc);

        atc->spdif_out_unmute(atc, 0);
        atc->spdif_in_unmute(atc, 0);
        atc->line_in_unmute(atc, 1);
        return;
}

static void do_switch(struct ct_atc *atc, enum CTALSA_MIXER_CTL type, int state)
{
        struct ct_mixer *mixer = atc->mixer;
        struct capabilities cap = atc->capabilities(atc);

        /* Do changes in mixer. */
        if ((SWH_CAPTURE_START <= type) && (SWH_CAPTURE_END >= type)) {
                if (state) {
                        ct_mixer_recording_select(mixer,
                                                  get_amixer_index(type));
                } else {
                        ct_mixer_recording_unselect(mixer,
                                                    get_amixer_index(type));
                }
        }
        /* Do changes out of mixer. */
        if (!cap.dedicated_mic &&
            (MIXER_LINEIN_C_S == type || MIXER_MIC_C_S == type)) {
                if (state)
                        do_line_mic_switch(atc, type);
                atc->line_in_unmute(atc, state);
        } else if (cap.dedicated_mic && (MIXER_LINEIN_C_S == type))
                atc->line_in_unmute(atc, state);
        else if (cap.dedicated_mic && (MIXER_MIC_C_S == type))
                atc->mic_unmute(atc, state);
        else if (MIXER_SPDIFI_C_S == type)
                atc->spdif_in_unmute(atc, state);
        else if (MIXER_WAVEF_P_S == type) {
                if (cap.dedicated_rca) {
                        atc->rca_unmute(atc, atc->rca_state ? 0 : state);
                        atc->line_front_unmute(atc, atc->rca_state ? state : 0);
                } else {
                        atc->line_front_unmute(atc, state);
                }
        }
        else if (MIXER_WAVES_P_S == type)
                atc->line_surround_unmute(atc, state);
        else if (MIXER_WAVEC_P_S == type)
                atc->line_clfe_unmute(atc, state);
        else if (MIXER_WAVER_P_S == type)
                atc->line_rear_unmute(atc, state);
        else if (MIXER_SPDIFO_P_S == type)
                atc->spdif_out_unmute(atc, state);
        else if (MIXER_DIGITAL_IO_S == type)
                do_digit_io_switch(atc, state);

        return;
}

static int ct_alsa_mix_switch_info(struct snd_kcontrol *kcontrol,
                                   struct snd_ctl_elem_info *uinfo)
{
        uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
        uinfo->count = 1;
        uinfo->value.integer.min = 0;
        uinfo->value.integer.max = 1;
        uinfo->value.integer.step = 1;

        return 0;
}

static int ct_alsa_mix_switch_get(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
{
        struct ct_mixer *mixer =
                ((struct ct_atc *)snd_kcontrol_chip(kcontrol))->mixer;
        enum CTALSA_MIXER_CTL type = kcontrol->private_value;

        ucontrol->value.integer.value[0] = get_switch_state(mixer, type);
        return 0;
}

static int ct_alsa_mix_switch_put(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
{
        struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
        struct ct_mixer *mixer = atc->mixer;
        enum CTALSA_MIXER_CTL type = kcontrol->private_value;
        int state;

        state = ucontrol->value.integer.value[0];
        if (get_switch_state(mixer, type) == state)
                return 0;

        set_switch_state(mixer, type, state);
        do_switch(atc, type, state);

        return 1;
}

static struct snd_kcontrol_new swh_ctl = {
        .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE,
        .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
        .info           = ct_alsa_mix_switch_info,
        .get            = ct_alsa_mix_switch_get,
        .put            = ct_alsa_mix_switch_put
};

static int dedicated_rca_info(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_info *info)
{
        static const char *const names[2] = {
          "RCA", "Front"
        };

        return snd_ctl_enum_info(info, 1, 2, names);
}

static int dedicated_rca_get(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_value *ucontrol)
{
        struct ct_atc *atc = snd_kcontrol_chip(kcontrol);

        ucontrol->value.enumerated.item[0] = atc->rca_state;
        return 0;
}

static int dedicated_rca_put(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_value *ucontrol)
{
        struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
        unsigned int rca_state = ucontrol->value.enumerated.item[0];
        unsigned char state;

        if (rca_state > 1)
                return -EINVAL;

        if (rca_state == atc->rca_state)
                return 0;

        state = get_switch_state(atc->mixer, MIXER_WAVEF_P_S);
        do_switch(atc, MIXER_WAVEF_P_S, 0);

        atc->rca_state = rca_state;
        atc->dedicated_rca_select(atc);

        do_switch(atc, MIXER_WAVEF_P_S, state);

        return 1;
}

static struct snd_kcontrol_new rca_ctl = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Analog Playback Route",
        .info = dedicated_rca_info,
        .get = dedicated_rca_get,
        .put = dedicated_rca_put,
};

static int ct_spdif_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 ct_spdif_get_mask(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 ct_spdif_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
        struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
        unsigned int status;

        atc->spdif_out_get_status(atc, &status);

        if (status == 0)
                status = SNDRV_PCM_DEFAULT_CON_SPDIF;

        ucontrol->value.iec958.status[0] = (status >> 0) & 0xff;
        ucontrol->value.iec958.status[1] = (status >> 8) & 0xff;
        ucontrol->value.iec958.status[2] = (status >> 16) & 0xff;
        ucontrol->value.iec958.status[3] = (status >> 24) & 0xff;

        return 0;
}

static int ct_spdif_put(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
        struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
        int change;
        unsigned int status, old_status;

        status = (ucontrol->value.iec958.status[0] << 0) |
                 (ucontrol->value.iec958.status[1] << 8) |
                 (ucontrol->value.iec958.status[2] << 16) |
                 (ucontrol->value.iec958.status[3] << 24);

        atc->spdif_out_get_status(atc, &old_status);
        change = (old_status != status);
        if (change)
                atc->spdif_out_set_status(atc, status);

        return change;
}

static struct snd_kcontrol_new iec958_mask_ctl = {
        .access         = SNDRV_CTL_ELEM_ACCESS_READ,
        .iface          = SNDRV_CTL_ELEM_IFACE_PCM,
        .name           = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
        .count          = 1,
        .info           = ct_spdif_info,
        .get            = ct_spdif_get_mask,
        .private_value  = MIXER_IEC958_MASK
};

static struct snd_kcontrol_new iec958_default_ctl = {
        .iface          = SNDRV_CTL_ELEM_IFACE_PCM,
        .name           = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
        .count          = 1,
        .info           = ct_spdif_info,
        .get            = ct_spdif_get,
        .put            = ct_spdif_put,
        .private_value  = MIXER_IEC958_DEFAULT
};

static struct snd_kcontrol_new iec958_ctl = {
        .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE,
        .iface          = SNDRV_CTL_ELEM_IFACE_PCM,
        .name           = SNDRV_CTL_NAME_IEC958("", PLAYBACK, PCM_STREAM),
        .count          = 1,
        .info           = ct_spdif_info,
        .get            = ct_spdif_get,
        .put            = ct_spdif_put,
        .private_value  = MIXER_IEC958_STREAM
};

#define NUM_IEC958_CTL 3

static int
ct_mixer_kcontrol_new(struct ct_mixer *mixer, struct snd_kcontrol_new *new)
{
        struct snd_kcontrol *kctl;
        int err;

        kctl = snd_ctl_new1(new, mixer->atc);
        if (!kctl)
                return -ENOMEM;

        if (SNDRV_CTL_ELEM_IFACE_PCM == kctl->id.iface)
                kctl->id.device = IEC958;

        err = snd_ctl_add(mixer->atc->card, kctl);
        if (err)
                return err;

        switch (new->private_value) {
        case MIXER_LINEIN_C_S:
                kctls[0] = kctl; break;
        case MIXER_MIC_C_S:
                kctls[1] = kctl; break;
        default:
                break;
        }

        return 0;
}

static int ct_mixer_kcontrols_create(struct ct_mixer *mixer)
{
        enum CTALSA_MIXER_CTL type;
        struct ct_atc *atc = mixer->atc;
        struct capabilities cap = atc->capabilities(atc);
        int err;

        /* Create snd kcontrol instances on demand */
        for (type = VOL_MIXER_START; type <= VOL_MIXER_END; type++) {
                if (ct_kcontrol_init_table[type].ctl) {
                        vol_ctl.name = ct_kcontrol_init_table[type].name;
                        vol_ctl.private_value = (unsigned long)type;
                        err = ct_mixer_kcontrol_new(mixer, &vol_ctl);
                        if (err)
                                return err;
                }
        }

        ct_kcontrol_init_table[MIXER_DIGITAL_IO_S].ctl = cap.digit_io_switch;

        for (type = SWH_MIXER_START; type <= SWH_MIXER_END; type++) {
                if (ct_kcontrol_init_table[type].ctl) {
                        swh_ctl.name = ct_kcontrol_init_table[type].name;
                        swh_ctl.private_value = (unsigned long)type;
                        err = ct_mixer_kcontrol_new(mixer, &swh_ctl);
                        if (err)
                                return err;
                }
        }

        err = ct_mixer_kcontrol_new(mixer, &iec958_mask_ctl);
        if (err)
                return err;

        err = ct_mixer_kcontrol_new(mixer, &iec958_default_ctl);
        if (err)
                return err;

        err = ct_mixer_kcontrol_new(mixer, &iec958_ctl);
        if (err)
                return err;

        if (cap.output_switch) {
                err = ct_mixer_kcontrol_new(mixer, &output_ctl);
                if (err)
                        return err;
        }

        if (cap.mic_source_switch) {
                err = ct_mixer_kcontrol_new(mixer, &mic_source_ctl);
                if (err)
                        return err;
        }

        if (cap.dedicated_rca) {
                err = ct_mixer_kcontrol_new(mixer, &rca_ctl);
                if (err)
                        return err;

                atc->line_front_unmute(atc, 0);
                atc->rca_unmute(atc, 1);
        } else {
                atc->line_front_unmute(atc, 1);
        }
        set_switch_state(mixer, MIXER_WAVEF_P_S, 1);
        atc->line_surround_unmute(atc, 0);
        set_switch_state(mixer, MIXER_WAVES_P_S, 0);
        atc->line_clfe_unmute(atc, 0);
        set_switch_state(mixer, MIXER_WAVEC_P_S, 0);
        atc->line_rear_unmute(atc, 0);
        set_switch_state(mixer, MIXER_WAVER_P_S, 0);
        atc->spdif_out_unmute(atc, 0);
        set_switch_state(mixer, MIXER_SPDIFO_P_S, 0);
        atc->line_in_unmute(atc, 0);
        if (cap.dedicated_mic)
                atc->mic_unmute(atc, 0);
        atc->spdif_in_unmute(atc, 0);
        set_switch_state(mixer, MIXER_PCM_C_S, 0);
        set_switch_state(mixer, MIXER_LINEIN_C_S, 0);
        set_switch_state(mixer, MIXER_SPDIFI_C_S, 0);

        return 0;
}

static void
ct_mixer_recording_select(struct ct_mixer *mixer, enum CT_AMIXER_CTL type)
{
        struct amixer *amix_d;
        struct sum *sum_c;
        int i;

        for (i = 0; i < 2; i++) {
                amix_d = mixer->amixers[type*CHN_NUM+i];
                sum_c = mixer->sums[SUM_IN_F_C*CHN_NUM+i];
                amix_d->ops->set_sum(amix_d, sum_c);
                amix_d->ops->commit_write(amix_d);
        }
}

static void
ct_mixer_recording_unselect(struct ct_mixer *mixer, enum CT_AMIXER_CTL type)
{
        struct amixer *amix_d;
        int i;

        for (i = 0; i < 2; i++) {
                amix_d = mixer->amixers[type*CHN_NUM+i];
                amix_d->ops->set_sum(amix_d, NULL);
                amix_d->ops->commit_write(amix_d);
        }
}

static int ct_mixer_get_resources(struct ct_mixer *mixer)
{
        struct sum_mgr *sum_mgr;
        struct sum *sum;
        struct sum_desc sum_desc = {0};
        struct amixer_mgr *amixer_mgr;
        struct amixer *amixer;
        struct amixer_desc am_desc = {0};
        int err;
        int i;

        /* Allocate sum resources for mixer obj */
        sum_mgr = (struct sum_mgr *)mixer->atc->rsc_mgrs[SUM];
        sum_desc.msr = mixer->atc->msr;
        for (i = 0; i < (NUM_CT_SUMS * CHN_NUM); i++) {
                err = sum_mgr->get_sum(sum_mgr, &sum_desc, &sum);
                if (err) {
                        dev_err(mixer->atc->card->dev,
                                "Failed to get sum resources for front output!\n");
                        break;
                }
                mixer->sums[i] = sum;
        }
        if (err)
                goto error1;

        /* Allocate amixer resources for mixer obj */
        amixer_mgr = (struct amixer_mgr *)mixer->atc->rsc_mgrs[AMIXER];
        am_desc.msr = mixer->atc->msr;
        for (i = 0; i < (NUM_CT_AMIXERS * CHN_NUM); i++) {
                err = amixer_mgr->get_amixer(amixer_mgr, &am_desc, &amixer);
                if (err) {
                        dev_err(mixer->atc->card->dev,
                                "Failed to get amixer resources for mixer obj!\n");
                        break;
                }
                mixer->amixers[i] = amixer;
        }
        if (err)
                goto error2;

        return 0;

error2:
        for (i = 0; i < (NUM_CT_AMIXERS * CHN_NUM); i++) {
                if (NULL != mixer->amixers[i]) {
                        amixer = mixer->amixers[i];
                        amixer_mgr->put_amixer(amixer_mgr, amixer);
                        mixer->amixers[i] = NULL;
                }
        }
error1:
        for (i = 0; i < (NUM_CT_SUMS * CHN_NUM); i++) {
                if (NULL != mixer->sums[i]) {
                        sum_mgr->put_sum(sum_mgr, (struct sum *)mixer->sums[i]);
                        mixer->sums[i] = NULL;
                }
        }

        return err;
}

static int ct_mixer_get_mem(struct ct_mixer **rmixer)
{
        struct ct_mixer *mixer;
        int err;

        *rmixer = NULL;
        /* Allocate mem for mixer obj */
        mixer = kzalloc_obj(*mixer);
        if (!mixer)
                return -ENOMEM;

        mixer->amixers = kcalloc(NUM_CT_AMIXERS * CHN_NUM, sizeof(void *),
                                 GFP_KERNEL);
        if (!mixer->amixers) {
                err = -ENOMEM;
                goto error1;
        }
        mixer->sums = kcalloc(NUM_CT_SUMS * CHN_NUM, sizeof(void *),
                              GFP_KERNEL);
        if (!mixer->sums) {
                err = -ENOMEM;
                goto error2;
        }

        *rmixer = mixer;
        return 0;

error2:
        kfree(mixer->amixers);
error1:
        kfree(mixer);
        return err;
}

static int ct_mixer_topology_build(struct ct_mixer *mixer)
{
        struct sum *sum;
        struct amixer *amix_d, *amix_s;
        enum CT_AMIXER_CTL i, j;
        enum CT_SUM_CTL k;

        /* Build topology from destination to source */

        /* Set up Master mixer */
        for (i = AMIXER_MASTER_F, k = SUM_IN_F;
                                        i <= AMIXER_MASTER_S; i++, k++) {
                amix_d = mixer->amixers[i*CHN_NUM];
                sum = mixer->sums[k*CHN_NUM];
                amix_d->ops->setup(amix_d, &sum->rsc, INIT_VOL, NULL);
                amix_d = mixer->amixers[i*CHN_NUM+1];
                sum = mixer->sums[k*CHN_NUM+1];
                amix_d->ops->setup(amix_d, &sum->rsc, INIT_VOL, NULL);
        }

        /* Set up Wave-out mixer */
        for (i = AMIXER_WAVE_F, j = AMIXER_MASTER_F;
                                        i <= AMIXER_WAVE_S; i++, j++) {
                amix_d = mixer->amixers[i*CHN_NUM];
                amix_s = mixer->amixers[j*CHN_NUM];
                amix_d->ops->setup(amix_d, &amix_s->rsc, INIT_VOL, NULL);
                amix_d = mixer->amixers[i*CHN_NUM+1];
                amix_s = mixer->amixers[j*CHN_NUM+1];
                amix_d->ops->setup(amix_d, &amix_s->rsc, INIT_VOL, NULL);
        }

        /* Set up S/PDIF-out mixer */
        amix_d = mixer->amixers[AMIXER_SPDIFO*CHN_NUM];
        amix_s = mixer->amixers[AMIXER_MASTER_F*CHN_NUM];
        amix_d->ops->setup(amix_d, &amix_s->rsc, INIT_VOL, NULL);
        amix_d = mixer->amixers[AMIXER_SPDIFO*CHN_NUM+1];
        amix_s = mixer->amixers[AMIXER_MASTER_F*CHN_NUM+1];
        amix_d->ops->setup(amix_d, &amix_s->rsc, INIT_VOL, NULL);

        /* Set up PCM-in mixer */
        for (i = AMIXER_PCM_F, k = SUM_IN_F; i <= AMIXER_PCM_S; i++, k++) {
                amix_d = mixer->amixers[i*CHN_NUM];
                sum = mixer->sums[k*CHN_NUM];
                amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
                amix_d = mixer->amixers[i*CHN_NUM+1];
                sum = mixer->sums[k*CHN_NUM+1];
                amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
        }

        /* Set up Line-in mixer */
        amix_d = mixer->amixers[AMIXER_LINEIN*CHN_NUM];
        sum = mixer->sums[SUM_IN_F*CHN_NUM];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
        amix_d = mixer->amixers[AMIXER_LINEIN*CHN_NUM+1];
        sum = mixer->sums[SUM_IN_F*CHN_NUM+1];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);

        /* Set up Mic-in mixer */
        amix_d = mixer->amixers[AMIXER_MIC*CHN_NUM];
        sum = mixer->sums[SUM_IN_F*CHN_NUM];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
        amix_d = mixer->amixers[AMIXER_MIC*CHN_NUM+1];
        sum = mixer->sums[SUM_IN_F*CHN_NUM+1];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);

        /* Set up S/PDIF-in mixer */
        amix_d = mixer->amixers[AMIXER_SPDIFI*CHN_NUM];
        sum = mixer->sums[SUM_IN_F*CHN_NUM];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
        amix_d = mixer->amixers[AMIXER_SPDIFI*CHN_NUM+1];
        sum = mixer->sums[SUM_IN_F*CHN_NUM+1];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);

        /* Set up Master recording mixer */
        amix_d = mixer->amixers[AMIXER_MASTER_F_C*CHN_NUM];
        sum = mixer->sums[SUM_IN_F_C*CHN_NUM];
        amix_d->ops->setup(amix_d, &sum->rsc, INIT_VOL, NULL);
        amix_d = mixer->amixers[AMIXER_MASTER_F_C*CHN_NUM+1];
        sum = mixer->sums[SUM_IN_F_C*CHN_NUM+1];
        amix_d->ops->setup(amix_d, &sum->rsc, INIT_VOL, NULL);

        /* Set up PCM-in recording mixer */
        amix_d = mixer->amixers[AMIXER_PCM_F_C*CHN_NUM];
        sum = mixer->sums[SUM_IN_F_C*CHN_NUM];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
        amix_d = mixer->amixers[AMIXER_PCM_F_C*CHN_NUM+1];
        sum = mixer->sums[SUM_IN_F_C*CHN_NUM+1];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);

        /* Set up Line-in recording mixer */
        amix_d = mixer->amixers[AMIXER_LINEIN_C*CHN_NUM];
        sum = mixer->sums[SUM_IN_F_C*CHN_NUM];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
        amix_d = mixer->amixers[AMIXER_LINEIN_C*CHN_NUM+1];
        sum = mixer->sums[SUM_IN_F_C*CHN_NUM+1];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);

        /* Set up Mic-in recording mixer */
        amix_d = mixer->amixers[AMIXER_MIC_C*CHN_NUM];
        sum = mixer->sums[SUM_IN_F_C*CHN_NUM];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
        amix_d = mixer->amixers[AMIXER_MIC_C*CHN_NUM+1];
        sum = mixer->sums[SUM_IN_F_C*CHN_NUM+1];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);

        /* Set up S/PDIF-in recording mixer */
        amix_d = mixer->amixers[AMIXER_SPDIFI_C*CHN_NUM];
        sum = mixer->sums[SUM_IN_F_C*CHN_NUM];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
        amix_d = mixer->amixers[AMIXER_SPDIFI_C*CHN_NUM+1];
        sum = mixer->sums[SUM_IN_F_C*CHN_NUM+1];
        amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);

        return 0;
}

static int mixer_set_input_port(struct amixer *amixer, struct rsc *rsc)
{
        amixer->ops->set_input(amixer, rsc);
        amixer->ops->commit_write(amixer);

        return 0;
}

static enum CT_AMIXER_CTL port_to_amixer(enum MIXER_PORT_T type)
{
        switch (type) {
        case MIX_WAVE_FRONT:    return AMIXER_WAVE_F;
        case MIX_WAVE_SURROUND: return AMIXER_WAVE_S;
        case MIX_WAVE_CENTLFE:  return AMIXER_WAVE_C;
        case MIX_WAVE_REAR:     return AMIXER_WAVE_R;
        case MIX_PCMO_FRONT:    return AMIXER_MASTER_F_C;
        case MIX_SPDIF_OUT:     return AMIXER_SPDIFO;
        case MIX_LINE_IN:       return AMIXER_LINEIN;
        case MIX_MIC_IN:        return AMIXER_MIC;
        case MIX_SPDIF_IN:      return AMIXER_SPDIFI;
        case MIX_PCMI_FRONT:    return AMIXER_PCM_F;
        case MIX_PCMI_SURROUND: return AMIXER_PCM_S;
        case MIX_PCMI_CENTLFE:  return AMIXER_PCM_C;
        case MIX_PCMI_REAR:     return AMIXER_PCM_R;
        default:                return 0;
        }
}

static int mixer_get_output_ports(struct ct_mixer *mixer,
                                  enum MIXER_PORT_T type,
                                  struct rsc **rleft, struct rsc **rright)
{
        enum CT_AMIXER_CTL amix = port_to_amixer(type);

        if (NULL != rleft)
                *rleft = &((struct amixer *)mixer->amixers[amix*CHN_NUM])->rsc;

        if (NULL != rright)
                *rright =
                        &((struct amixer *)mixer->amixers[amix*CHN_NUM+1])->rsc;

        return 0;
}

static int mixer_set_input_left(struct ct_mixer *mixer,
                                enum MIXER_PORT_T type, struct rsc *rsc)
{
        enum CT_AMIXER_CTL amix = port_to_amixer(type);

        mixer_set_input_port(mixer->amixers[amix*CHN_NUM], rsc);
        amix = get_recording_amixer(amix);
        if (amix < NUM_CT_AMIXERS)
                mixer_set_input_port(mixer->amixers[amix*CHN_NUM], rsc);

        return 0;
}

static int
mixer_set_input_right(struct ct_mixer *mixer,
                      enum MIXER_PORT_T type, struct rsc *rsc)
{
        enum CT_AMIXER_CTL amix = port_to_amixer(type);

        mixer_set_input_port(mixer->amixers[amix*CHN_NUM+1], rsc);
        amix = get_recording_amixer(amix);
        if (amix < NUM_CT_AMIXERS)
                mixer_set_input_port(mixer->amixers[amix*CHN_NUM+1], rsc);

        return 0;
}

#ifdef CONFIG_PM_SLEEP
static int mixer_resume(struct ct_mixer *mixer)
{
        int i, state;
        struct amixer *amixer;

        /* resume topology and volume gain. */
        for (i = 0; i < NUM_CT_AMIXERS*CHN_NUM; i++) {
                amixer = mixer->amixers[i];
                amixer->ops->commit_write(amixer);
        }

        /* resume switch state. */
        for (i = SWH_MIXER_START; i <= SWH_MIXER_END; i++) {
                state = get_switch_state(mixer, i);
                do_switch(mixer->atc, i, state);
        }

        return 0;
}
#endif

int ct_mixer_destroy(struct ct_mixer *mixer)
{
        struct sum_mgr *sum_mgr = (struct sum_mgr *)mixer->atc->rsc_mgrs[SUM];
        struct amixer_mgr *amixer_mgr =
                        (struct amixer_mgr *)mixer->atc->rsc_mgrs[AMIXER];
        struct amixer *amixer;
        int i = 0;

        /* Release amixer resources */
        for (i = 0; i < (NUM_CT_AMIXERS * CHN_NUM); i++) {
                if (NULL != mixer->amixers[i]) {
                        amixer = mixer->amixers[i];
                        amixer_mgr->put_amixer(amixer_mgr, amixer);
                }
        }

        /* Release sum resources */
        for (i = 0; i < (NUM_CT_SUMS * CHN_NUM); i++) {
                if (NULL != mixer->sums[i])
                        sum_mgr->put_sum(sum_mgr, (struct sum *)mixer->sums[i]);
        }

        /* Release mem assigned to mixer object */
        kfree(mixer->sums);
        kfree(mixer->amixers);
        kfree(mixer);

        return 0;
}

int ct_mixer_create(struct ct_atc *atc, struct ct_mixer **rmixer)
{
        struct ct_mixer *mixer;
        int err;

        *rmixer = NULL;

        /* Allocate mem for mixer obj */
        err = ct_mixer_get_mem(&mixer);
        if (err)
                return err;

        mixer->switch_state = 0;
        mixer->atc = atc;
        /* Set operations */
        mixer->get_output_ports = mixer_get_output_ports;
        mixer->set_input_left = mixer_set_input_left;
        mixer->set_input_right = mixer_set_input_right;
#ifdef CONFIG_PM_SLEEP
        mixer->resume = mixer_resume;
#endif

        /* Allocate chip resources for mixer obj */
        err = ct_mixer_get_resources(mixer);
        if (err)
                goto error;

        /* Build internal mixer topology */
        ct_mixer_topology_build(mixer);

        *rmixer = mixer;

        return 0;

error:
        ct_mixer_destroy(mixer);
        return err;
}

int ct_alsa_mix_create(struct ct_atc *atc,
                       enum CTALSADEVS device,
                       const char *device_name)
{
        int err;

        /* Create snd kcontrol instances on demand */
        /* vol_ctl.device = swh_ctl.device = device; */ /* better w/ device 0 */
        err = ct_mixer_kcontrols_create((struct ct_mixer *)atc->mixer);
        if (err)
                return err;

        strscpy(atc->card->mixername, device_name);

        return 0;
}