/** @file
This module provides an implementation of the SMM Control PPI for use with
the QNC.

Copyright (c) 2013-2015 Intel Corporation.

This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include <PiPei.h>

#include <Ppi/SmmControl.h>

#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/PcdLib.h>
#include <Library/IoLib.h>
#include <Library/PciLib.h>

#include <IntelQNCPeim.h>
#include <Library/QNCAccessLib.h>
#include <Uefi/UefiBaseType.h>

/**
  Generates an SMI using the parameters passed in.

  @param  PeiServices         Describes the list of possible PEI Services.
  @param  This                A pointer to an instance of
                              EFI_SMM_CONTROL_PPI
  @param  ArgumentBuffer      The argument buffer
  @param  ArgumentBufferSize  The size of the argument buffer
  @param  Periodic            TRUE to indicate a periodical SMI
  @param  ActivationInterval  Interval of the periodical SMI

  @retval EFI_INVALID_PARAMETER  Periodic is TRUE or ArgumentBufferSize > 1
  @retval EFI_SUCCESS            SMI generated

**/
EFI_STATUS
EFIAPI
PeiActivate (
  IN      EFI_PEI_SERVICES           **PeiServices,
  IN      PEI_SMM_CONTROL_PPI        *This,
  IN OUT  INT8                       *ArgumentBuffer OPTIONAL,
  IN OUT  UINTN                      *ArgumentBufferSize OPTIONAL,
  IN      BOOLEAN                    Periodic OPTIONAL,
  IN      UINTN                      ActivationInterval OPTIONAL
  );

/**
  Clears an SMI.

  @param  PeiServices         Describes the list of possible PEI Services.
  @param  This                Pointer to an instance of EFI_SMM_CONTROL_PPI
  @param  Periodic            TRUE to indicate a periodical SMI

  @return Return value from SmmClear()

**/
EFI_STATUS
EFIAPI
PeiDeactivate (
  IN  EFI_PEI_SERVICES            **PeiServices,
  IN  PEI_SMM_CONTROL_PPI         *This,
  IN  BOOLEAN                     Periodic OPTIONAL
  );

PEI_SMM_CONTROL_PPI      mSmmControlPpi = {
  PeiActivate,
  PeiDeactivate
};

EFI_PEI_PPI_DESCRIPTOR   mPpiList = {
  (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
  &gPeiSmmControlPpiGuid,
  &mSmmControlPpi
};

/**
  Clear SMI related chipset status and re-enable SMI by setting the EOS bit.

  @retval EFI_SUCCESS       The requested operation has been carried out successfully
  @retval EFI_DEVICE_ERROR  The EOS bit could not be set.

**/
EFI_STATUS
SmmClear (
  VOID
  )
{
  UINT16                       GPE0BLK_Base;

  //
  // Get GPE0BLK_Base
  //
  GPE0BLK_Base = PcdGet16 (PcdGpe0blkIoBaseAddress);

  //
  // Clear the Power Button Override Status Bit, it gates EOS from being set.
  // In QuarkNcSocId - Bit is read only. Handled by external SMC, do nothing.
  //

  //
  // Clear the APM SMI Status Bit
  //
  IoWrite32 ((GPE0BLK_Base + R_QNC_GPE0BLK_SMIS), B_QNC_GPE0BLK_SMIS_APM);

  //
  // Set the EOS Bit
  //
  IoOr32 ((GPE0BLK_Base + R_QNC_GPE0BLK_SMIS), B_QNC_GPE0BLK_SMIS_EOS);

  return EFI_SUCCESS;
}


EFI_STATUS
EFIAPI
SmmTrigger (
  IN UINT8   Data
  )
/*++

Routine Description:

  Trigger the software SMI

Arguments:

  Data                          The value to be set on the software SMI data port

Returns:

  EFI_SUCCESS                   Function completes successfully

--*/
{
  UINT16        GPE0BLK_Base;
  UINT32        NewValue;

  //
  // Get GPE0BLK_Base
  //
  GPE0BLK_Base = PcdGet16 (PcdGpe0blkIoBaseAddress);

  //
  // Enable the APMC SMI
  //
  IoOr32 (GPE0BLK_Base + R_QNC_GPE0BLK_SMIE, B_QNC_GPE0BLK_SMIE_APM);

  //
  // Enable SMI globally
  //
  NewValue = QNCPortRead (QUARK_NC_HOST_BRIDGE_SB_PORT_ID, QNC_MSG_FSBIC_REG_HMISC);
  NewValue |= SMI_EN;
  QNCPortWrite (QUARK_NC_HOST_BRIDGE_SB_PORT_ID, QNC_MSG_FSBIC_REG_HMISC, NewValue);


  //
  // Generate the APMC SMI
  //
  IoWrite8 (PcdGet16 (PcdSmmActivationPort), Data);

  return EFI_SUCCESS;
}

/**
  Generates an SMI using the parameters passed in.

  @param  PeiServices         Describes the list of possible PEI Services.
  @param  This                A pointer to an instance of
                              EFI_SMM_CONTROL_PPI
  @param  ArgumentBuffer      The argument buffer
  @param  ArgumentBufferSize  The size of the argument buffer
  @param  Periodic            TRUE to indicate a periodical SMI
  @param  ActivationInterval  Interval of the periodical SMI

  @retval EFI_INVALID_PARAMETER  Periodic is TRUE or ArgumentBufferSize > 1
  @retval EFI_SUCCESS            SMI generated

**/
EFI_STATUS
EFIAPI
PeiActivate (
  IN      EFI_PEI_SERVICES           **PeiServices,
  IN      PEI_SMM_CONTROL_PPI        *This,
  IN OUT  INT8                       *ArgumentBuffer OPTIONAL,
  IN OUT  UINTN                      *ArgumentBufferSize OPTIONAL,
  IN      BOOLEAN                    Periodic OPTIONAL,
  IN      UINTN                      ActivationInterval OPTIONAL
  )
{
  INT8       Data;
  EFI_STATUS Status;
  //
  // Periodic SMI not supported.
  //
  if (Periodic) {
    DEBUG ((DEBUG_WARN, "Invalid parameter\n"));
    return EFI_INVALID_PARAMETER;
  }

  if (ArgumentBuffer == NULL) {
    Data = 0xFF;
  } else {
    if (ArgumentBufferSize == NULL || *ArgumentBufferSize != 1) {
      return EFI_INVALID_PARAMETER;
    }

    Data = *ArgumentBuffer;
  }
  //
  // Clear any pending the APM SMI
  //
  Status = SmmClear ();
  if (EFI_ERROR (Status)) {
    return Status;
  }

  return SmmTrigger (Data);
}

/**
  Clears an SMI.

  @param  PeiServices         Describes the list of possible PEI Services.
  @param  This                Pointer to an instance of EFI_SMM_CONTROL_PPI
  @param  Periodic            TRUE to indicate a periodical SMI

  @return Return value from SmmClear()

**/
EFI_STATUS
EFIAPI
PeiDeactivate (
  IN  EFI_PEI_SERVICES            **PeiServices,
  IN  PEI_SMM_CONTROL_PPI         *This,
  IN  BOOLEAN                     Periodic OPTIONAL
  )
{
  if (Periodic) {
    return EFI_INVALID_PARAMETER;
  }
  return SmmClear ();
}

/**
  This is the constructor for the SMM Control Ppi.

  This function installs EFI_SMM_CONTROL_PPI.

  @param   FileHandle       Handle of the file being invoked.
  @param   PeiServices      Describes the list of possible PEI Services.

  @retval EFI_UNSUPPORTED There's no Intel ICH on this platform
  @return The status returned from InstallPpi().

--*/
EFI_STATUS
EFIAPI
SmmControlPeiEntry (
  IN       EFI_PEI_FILE_HANDLE  FileHandle,
  IN CONST EFI_PEI_SERVICES     **PeiServices
  )
{
  EFI_STATUS  Status;

  Status      = (**PeiServices).InstallPpi (PeiServices, &mPpiList);
  ASSERT_EFI_ERROR (Status);

  return Status;
}