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ctmixer.c

/**
 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
 *
 * This source file is released under GPL v2 license (no other versions).
 * See the COPYING file included in the main directory of this source
 * distribution for the license terms and conditions.
 *
 * @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_LINEIN_P_S,
      MIXER_SPDIFO_P_S,
      MIXER_SPDIFI_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-in Playback Volume",
      },
      [MIXER_LINEIN_C] = {
            .ctl = 1,
            .name = "Line-in 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 = "S/PDIF-in Playback Volume",
      },
      [MIXER_SPDIFI_C] = {
            .ctl = 1,
            .name = "S/PDIF-in Capture Volume",
      },
      [MIXER_SPDIFO_P] = {
            .ctl = 1,
            .name = "S/PDIF-out 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-in Capture Switch",
      },
      [MIXER_MIC_C_S] = {
            .ctl = 1,
            .name = "Mic Capture Switch",
      },
      [MIXER_SPDIFI_C_S] = {
            .ctl = 1,
            .name = "S/PDIF-in Capture Switch",
      },
      [MIXER_LINEIN_P_S] = {
            .ctl = 1,
            .name = "Line-in Playback Switch",
      },
      [MIXER_SPDIFO_P_S] = {
            .ctl = 1,
            .name = "S/PDIF-out Playback Switch",
      },
      [MIXER_SPDIFI_P_S] = {
            .ctl = 1,
            .name = "S/PDIF-in 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);

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 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;

      /* 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 (state && (MIXER_LINEIN_C_S == type || MIXER_MIC_C_S == type))
            do_line_mic_switch(atc, type);
      else if (MIXER_WAVEF_P_S == type)
            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_LINEIN_P_S == type)
            atc->line_in_unmute(atc, state);
      else if (MIXER_SPDIFO_P_S == type)
            atc->spdif_out_unmute(atc, state);
      else if (MIXER_SPDIFI_P_S == type)
            atc->spdif_in_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 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_default_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      unsigned int 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_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);
      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_default_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;
      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 =
                              atc->have_digit_io_switch(atc);
      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;

      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);
      set_switch_state(mixer, MIXER_LINEIN_P_S, 0);
      atc->spdif_in_unmute(atc, 0);
      set_switch_state(mixer, MIXER_SPDIFI_P_S, 0);

      set_switch_state(mixer, MIXER_PCM_C_S, 1);
      set_switch_state(mixer, MIXER_LINEIN_C_S, 1);
      set_switch_state(mixer, MIXER_SPDIFI_C_S, 1);

      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) {
                  printk(KERN_ERR "ctxfi: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) {
                  printk(KERN_ERR "ctxfi: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(sizeof(*mixer), GFP_KERNEL);
      if (!mixer)
            return -ENOMEM;

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

      /* Build topology from destination to source */

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

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

      return 0;
}

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