/** @file
  Provides Set/Get time operations.

Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "PcRtc.h"

PC_RTC_MODULE_GLOBALS  mModuleGlobal;

EFI_HANDLE             mHandle = NULL;

/**
  Returns the current time and date information, and the time-keeping capabilities
  of the hardware platform.

  @param  Time          A pointer to storage to receive a snapshot of the current time.
  @param  Capabilities  An optional pointer to a buffer to receive the real time
                        clock device's capabilities.

  @retval EFI_SUCCESS            The operation completed successfully.
  @retval EFI_INVALID_PARAMETER  Time is NULL.
  @retval EFI_DEVICE_ERROR       The time could not be retrieved due to hardware error.

**/
EFI_STATUS
EFIAPI
PcRtcEfiGetTime (
  OUT EFI_TIME                *Time,
  OUT EFI_TIME_CAPABILITIES   *Capabilities  OPTIONAL
  )
{
  return PcRtcGetTime (Time, Capabilities, &mModuleGlobal);
}

/**
  Sets the current local time and date information.

  @param  Time                   A pointer to the current time.

  @retval EFI_SUCCESS            The operation completed successfully.
  @retval EFI_INVALID_PARAMETER  A time field is out of range.
  @retval EFI_DEVICE_ERROR       The time could not be set due due to hardware error.

**/
EFI_STATUS
EFIAPI
PcRtcEfiSetTime (
  IN EFI_TIME                *Time
  )
{
  return PcRtcSetTime (Time, &mModuleGlobal);
}

/**
  Returns the current wakeup alarm clock setting.

  @param  Enabled  Indicates if the alarm is currently enabled or disabled.
  @param  Pending  Indicates if the alarm signal is pending and requires acknowledgement.
  @param  Time     The current alarm setting.

  @retval EFI_SUCCESS           The alarm settings were returned.
  @retval EFI_INVALID_PARAMETER Enabled is NULL.
  @retval EFI_INVALID_PARAMETER Pending is NULL.
  @retval EFI_INVALID_PARAMETER Time is NULL.
  @retval EFI_DEVICE_ERROR      The wakeup time could not be retrieved due to a hardware error.
  @retval EFI_UNSUPPORTED       A wakeup timer is not supported on this platform.

**/
EFI_STATUS
EFIAPI
PcRtcEfiGetWakeupTime (
  OUT BOOLEAN     *Enabled,
  OUT BOOLEAN     *Pending,
  OUT EFI_TIME    *Time
  )
{
  return PcRtcGetWakeupTime (Enabled, Pending, Time, &mModuleGlobal);
}


/**
  Sets the system wakeup alarm clock time.

  @param  Enabled  Enable or disable the wakeup alarm.
  @param  Time     If Enable is TRUE, the time to set the wakeup alarm for.
                   If Enable is FALSE, then this parameter is optional, and may be NULL.

  @retval EFI_SUCCESS            If Enable is TRUE, then the wakeup alarm was enabled.
                                 If Enable is FALSE, then the wakeup alarm was disabled.
  @retval EFI_INVALID_PARAMETER  A time field is out of range.
  @retval EFI_DEVICE_ERROR       The wakeup time could not be set due to a hardware error.
  @retval EFI_UNSUPPORTED        A wakeup timer is not supported on this platform.

**/
EFI_STATUS
EFIAPI
PcRtcEfiSetWakeupTime (
  IN BOOLEAN      Enabled,
  IN EFI_TIME    *Time       OPTIONAL
  )
{
  return PcRtcSetWakeupTime (Enabled, Time, &mModuleGlobal);
}

/**
  The user Entry Point for PcRTC module.

  This is the entrhy point for PcRTC module. It installs the UEFI runtime service
  including GetTime(),SetTime(),GetWakeupTime(),and SetWakeupTime().

  @param  ImageHandle    The firmware allocated handle for the EFI image.
  @param  SystemTable    A pointer to the EFI System Table.

  @retval EFI_SUCCESS    The entry point is executed successfully.
  @retval Others         Some error occurs when executing this entry point.

**/
EFI_STATUS
EFIAPI
InitializePcRtc (
  IN EFI_HANDLE                            ImageHandle,
  IN EFI_SYSTEM_TABLE                      *SystemTable
  )
{
  EFI_STATUS  Status;
  EFI_EVENT   Event;

  EfiInitializeLock (&mModuleGlobal.RtcLock, TPL_CALLBACK);
  mModuleGlobal.CenturyRtcAddress = GetCenturyRtcAddress ();

  Status = PcRtcInit (&mModuleGlobal);
  ASSERT_EFI_ERROR(Status);
  if (EFI_ERROR(Status)) {
    return Status;
  }

  Status = gBS->CreateEventEx (
                  EVT_NOTIFY_SIGNAL,
                  TPL_CALLBACK,
                  PcRtcAcpiTableChangeCallback,
                  NULL,
                  &gEfiAcpi10TableGuid,
                  &Event
                  );
  ASSERT_EFI_ERROR(Status);
  if (EFI_ERROR(Status)) {
    return Status;
  }

  Status = gBS->CreateEventEx (
                  EVT_NOTIFY_SIGNAL,
                  TPL_CALLBACK,
                  PcRtcAcpiTableChangeCallback,
                  NULL,
                  &gEfiAcpiTableGuid,
                  &Event
                  );
  ASSERT_EFI_ERROR(Status);
  if (EFI_ERROR(Status)) {
    return Status;
  }

  gRT->GetTime       = PcRtcEfiGetTime;
  gRT->SetTime       = PcRtcEfiSetTime;
  gRT->GetWakeupTime = PcRtcEfiGetWakeupTime;
  gRT->SetWakeupTime = PcRtcEfiSetWakeupTime;

  Status = gBS->InstallMultipleProtocolInterfaces (
                  &mHandle,
                  &gEfiRealTimeClockArchProtocolGuid,
                  NULL,
                  NULL
                  );
  ASSERT_EFI_ERROR(Status);

  return Status;
}