/** @file
  This library abstract how to access TPM2 hardware device.

;******************************************************************************
;* Copyright (c) 2014, Insyde Software Corp. All Rights Reserved.
;*
;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
;* transmit, broadcast, present, recite, release, license or otherwise exploit
;* any part of this publication in any form, by any means, without the prior
;* written permission of Insyde Software Corporation.
;*
;******************************************************************************
*/
#include <Library/DebugLib.h>
#include <Library/Tpm2DeviceLib.h>
#include <Library/PeiServicesTablePointerLib.h>
#include <Ppi/Tpm2InterfacePei.h>

/**
  This service enables the sending of commands to the TPM2.

  @param[in]      InputParameterBlockSize  Size of the TPM2 input parameter block.
  @param[in]      InputParameterBlock      Pointer to the TPM2 input parameter block.
  @param[in,out]  OutputParameterBlockSize Size of the TPM2 output parameter block.
  @param[in]      OutputParameterBlock     Pointer to the TPM2 output parameter block.

  @retval EFI_SUCCESS            The command byte stream was successfully sent to the device and a response was successfully received.
  @retval EFI_DEVICE_ERROR       The command was not successfully sent to the device or a response was not successfully received from the device.
  @retval EFI_BUFFER_TOO_SMALL   The output parameter block is too small. 
  @retval EFI_INVALID_PARAMETER  PeiServices not found.   
**/
EFI_STATUS
EFIAPI
PpiBasedTpm2SubmitCommand (
  IN UINT32            InputParameterBlockSize,
  IN UINT8             *InputParameterBlock,
  IN OUT UINT32        *OutputParameterBlockSize,
  IN UINT8             *OutputParameterBlock
  );

/**
  This service requests use TPM2.

  @retval EFI_SUCCESS      Get the control of TPM2 chip.
  @retval EFI_NOT_FOUND    TPM2 not found.
  @retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
PpiBasedTpm2RequestUseTpm (
  VOID
  );

/**
  This service enables the sending of commands to the TPM2.

  @param[in]      InputParameterBlockSize  Size of the TPM2 input parameter block.
  @param[in]      InputParameterBlock      Pointer to the TPM2 input parameter block.
  @param[in,out]  OutputParameterBlockSize Size of the TPM2 output parameter block.
  @param[in]      OutputParameterBlock     Pointer to the TPM2 output parameter block.

  @retval EFI_SUCCESS            The command byte stream was successfully sent to the device and a response was successfully received.
  @retval EFI_DEVICE_ERROR       The command was not successfully sent to the device or a response was not successfully received from the device.
  @retval EFI_BUFFER_TOO_SMALL   The output parameter block is too small. 
  @retval EFI_INVALID_PARAMETER  PeiServices not found.   
**/
EFI_STATUS
EFIAPI
Tpm2SubmitCommand (
  IN UINT32            InputParameterBlockSize,
  IN UINT8             *InputParameterBlock,
  IN OUT UINT32        *OutputParameterBlockSize,
  IN UINT8             *OutputParameterBlock
  )
{
  return PpiBasedTpm2SubmitCommand (
           InputParameterBlockSize,
           InputParameterBlock,
           OutputParameterBlockSize,
           OutputParameterBlock
           );
}

/**
  This service requests use TPM2.

  @retval EFI_SUCCESS      Get the control of TPM2 chip.
  @retval EFI_NOT_FOUND    TPM2 not found.
  @retval EFI_DEVICE_ERROR Unexpected device behavior.
**/
EFI_STATUS
EFIAPI
Tpm2RequestUseTpm (
  VOID
  )
{
  return PpiBasedTpm2RequestUseTpm ();
}

/**
  This service register TPM2 device.

  @param Tpm2Device  TPM2 device

  @retval EFI_SUCCESS          This TPM2 device is registered successfully.
  @retval EFI_UNSUPPORTED      System does not support register this TPM2 device.
  @retval EFI_ALREADY_STARTED  System already register this TPM2 device.
**/
EFI_STATUS
EFIAPI
Tpm2RegisterTpm2DeviceLib (
  IN TPM2_DEVICE_INTERFACE   *Tpm2Device
  )
{
  return EFI_UNSUPPORTED;
}