text: /****************************************************************************
   * bsp/board/spresense/src/cxd56_audio_amp.c
   *
   *   Copyright 2018 Sony Semiconductor Solutions Corporation
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   * 3. Neither the name of Sony Semiconductor Solutions Corporation nor
   *    the names of its contributors may be used to endorse or promote
   *    products derived from this software without specific prior written
   *    permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <sdk/config.h>
  
  #include <sys/types.h>
  #include <stdint.h>
  #include <stdbool.h>
  #include <errno.h>
  #include <assert.h>
  #include <debug.h>
  
  #include <nuttx/arch.h>
  
  #include "chip.h"
  #include "up_arch.h"
  
  #include <arch/board/board.h>
  #include "cxd56_pmic.h"
  #include "cxd56_gpio.h"
  #include "cxd56_pinconfig.h"
  
  /****************************************************************************
   * Pre-processor Definitions
   ****************************************************************************/
  
  #define MUTE_OFF_DELAY  (1250 * 1000) /* ms */
  #define MUTE_ON_DELAY   (150 * 1000) /* ms */
  
  /****************************************************************************
   * Name: board_external_amp_mute_control
   *
   * Description:
   *   External Amp. Mute on/off.
   *    true:  Mute on
   *    false: Mute off
   *
   ****************************************************************************/
  
  int board_external_amp_mute_control(bool en)
  {
    int ret = 0;
  
    if (en)
      {
        /* Mute ON */
  
        ret = board_power_control(POWER_AUDIO_MUTE, false);
        usleep(MUTE_ON_DELAY);
      }
    else
      {
        /* Mute OFF */
  
        usleep(MUTE_OFF_DELAY);
        ret = board_power_control(POWER_AUDIO_MUTE, true);
      }
  
    return ret;
  }
  
  /****************************************************************************
   * Name: board_external_amp_mute_monitor
   *
   * Description:
   *   Get External Amp. Mute status.
   *    true:  Mute on
   *    false: Mute off
   *
   ****************************************************************************/
  
  bool board_external_amp_mute_monitor(void)
  {
    bool mute = board_power_monitor(POWER_AUDIO_MUTE);
    return !mute;
  }
  
  