/****************************************************************************
 * boards/arm/cxd56xx/drivers/audio/cxd56_audio_volume.c
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <nuttx/arch.h>
#include <nuttx/signal.h>

#include "cxd56_audio_config.h"
#include "cxd56_audio_ac_reg.h"
#include "cxd56_audio_analog.h"
#include "cxd56_audio_volume.h"

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

/* Number of volume device. */

#define VOLUME_NUM      3

/* Maximum value. */

#define VOLUME_MAX      120

/* Minimum value. */

#define VOLUME_MIN      -1020

/* Mute volume. */

#define VOLUME_MUTE     -1025

#define MUTE_BIT_API  0x01
#define MUTE_BIT_FADE 0x02
#define MUTE_VOL_REG  0x33
#define VOL_WAIT_TIME 20
#define VOL_TO_REG(vol) (((vol) / 5) & 0xff)
#define VOL_MUTE_TIME(vol, n_cycle) \
  (((VOL_TO_REG(vol) - MUTE_VOL_REG) & 0xff) * (n_cycle + 1) * 4 / 48 * 1000)

/****************************************************************************
 * Private Types
 ****************************************************************************/

struct set_vol_prm_s
{
  int16_t hold_vol;
  uint8_t mute_bit;
};

/****************************************************************************
 * Private Data
 ****************************************************************************/

static struct set_vol_prm_s g_volparam[VOLUME_NUM] =
{
  {VOLUME_MUTE, MUTE_BIT_API},
  {VOLUME_MUTE, MUTE_BIT_API},
  {VOLUME_MUTE, MUTE_BIT_API}
};

/****************************************************************************
 * Private Functions
 ****************************************************************************/

static CXD56_AUDIO_ECODE set_mute(cxd56_audio_volid_t id,
                                  bool wait,
                                  uint8_t type)
{
  uint32_t waittime = 0;

  waittime = VOL_MUTE_TIME(g_volparam[id].hold_vol, 1);

  if (g_volparam[id].mute_bit == 0)
    {
      switch (id)
        {
          case CXD56_AUDIO_VOLID_MIXER_IN1:
            cxd56_audio_ac_reg_set_vol_sdin1(MUTE_VOL_REG);
            break;

          case CXD56_AUDIO_VOLID_MIXER_IN2:
            cxd56_audio_ac_reg_set_vol_sdin2(MUTE_VOL_REG);
            break;

          default:
            cxd56_audio_ac_reg_set_vol_dac(MUTE_VOL_REG);
            break;
        }
    }

  if (wait)
    {
      nxsig_usleep(waittime);
    }

  g_volparam[id].mute_bit |= type;

  if (g_volparam[CXD56_AUDIO_VOLID_MIXER_OUT].mute_bit != 0)
    {
      CXD56_AUDIO_ECODE ret = cxd56_audio_analog_disable_output();
      if (ret != CXD56_AUDIO_ECODE_OK)
        {
          return ret;
        }
    }

  return CXD56_AUDIO_ECODE_OK;
}

static CXD56_AUDIO_ECODE set_unmute(cxd56_audio_volid_t id,
                                    bool wait,
                                    uint8_t type)
{
  uint32_t waittime = 0;

  g_volparam[id].mute_bit &= ~type;

  if (g_volparam[CXD56_AUDIO_VOLID_MIXER_OUT].mute_bit == 0)
    {
      CXD56_AUDIO_ECODE ret = cxd56_audio_analog_enable_output();
      if (ret != CXD56_AUDIO_ECODE_OK)
        {
          return ret;
        }
    }

  if (g_volparam[id].mute_bit == 0)
    {
      if (type == MUTE_BIT_API)
        {
          waittime = VOL_WAIT_TIME;
        }
      else
        {
          /* fade */

          waittime = VOL_MUTE_TIME(g_volparam[id].hold_vol, 1);
        }

      uint32_t vol = VOL_TO_REG(g_volparam[id].hold_vol);

      switch (id)
        {
          case CXD56_AUDIO_VOLID_MIXER_IN1:
            cxd56_audio_ac_reg_set_vol_sdin1(vol);
            break;

          case CXD56_AUDIO_VOLID_MIXER_IN2:
            cxd56_audio_ac_reg_set_vol_sdin2(vol);
            break;

          default:
            cxd56_audio_ac_reg_set_vol_dac(vol);
            break;
        }

      if (wait)
        {
          nxsig_usleep(waittime);
        }
    }

  return CXD56_AUDIO_ECODE_OK;
}

/****************************************************************************
 * Public Functions
 ****************************************************************************/

CXD56_AUDIO_ECODE cxd56_audio_volume_set(cxd56_audio_volid_t id,
                                         int16_t vol)
{
  if (id >= VOLUME_NUM)
    {
      return CXD56_AUDIO_ECODE_VOL_ID;
    }

  if (VOLUME_MIN > vol)
    {
      if (VOLUME_MUTE != vol)
        {
          return CXD56_AUDIO_ECODE_VOL_MIN;
        }
    }

  if (VOLUME_MAX < vol)
    {
      return CXD56_AUDIO_ECODE_VOL_MAX;
    }

  g_volparam[id].hold_vol = vol;
  set_unmute(id, true, MUTE_BIT_API);

  return CXD56_AUDIO_ECODE_OK;
}

CXD56_AUDIO_ECODE cxd56_audio_volume_mute(cxd56_audio_volid_t id)
{
  if (id >= VOLUME_NUM)
    {
      return CXD56_AUDIO_ECODE_VOL_ID;
    }

  set_mute(id, true, MUTE_BIT_API);

  return CXD56_AUDIO_ECODE_OK;
}

CXD56_AUDIO_ECODE cxd56_audio_volume_unmute(cxd56_audio_volid_t id)
{
  if (id >= VOLUME_NUM)
    {
      return CXD56_AUDIO_ECODE_VOL_ID;
    }

  set_unmute(id, true, MUTE_BIT_API);

  return CXD56_AUDIO_ECODE_OK;
}

CXD56_AUDIO_ECODE cxd56_audio_volume_mute_fade(cxd56_audio_volid_t id,
                                               bool wait)
{
  if (id >= VOLUME_NUM)
    {
      return CXD56_AUDIO_ECODE_VOL_ID;
    }

  set_mute(id, wait, MUTE_BIT_FADE);

  return CXD56_AUDIO_ECODE_OK;
}

CXD56_AUDIO_ECODE cxd56_audio_volume_unmute_fade(cxd56_audio_volid_t id,
                                                 bool wait)
{
  if (id >= VOLUME_NUM)
    {
      return CXD56_AUDIO_ECODE_VOL_ID;
    }

  set_unmute(id, wait, MUTE_BIT_FADE);

  return CXD56_AUDIO_ECODE_OK;
}