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/** @file
Internal header file for Smbus library.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __INTERNAL_SMBUS_LIB_H_
#define __INTERNAL_SMBUS_LIB_H_
#include <PiPei.h>
#include <Ppi/Smbus2.h>
#include <Library/SmbusLib.h>
#include <Library/DebugLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/BaseMemoryLib.h>
//
// Declaration for internal functions
//
/**
Gets Smbus PPIs.
This internal function retrieves Smbus PPI from PPI database.
@param VOID
@return The pointer to Smbus PPI.
**/
EFI_PEI_SMBUS2_PPI *
InternalGetSmbusPpi (
VOID
);
/**
Executes an SMBus operation to an SMBus controller.
This function provides a standard way to execute Smbus script
as defined in the SmBus Specification. The data can either be of
the Length byte, word, or a block of data.
@param SmbusOperation Signifies which particular SMBus hardware protocol
instance that it will use to execute the SMBus transactions.
@param SmBusAddress The address that encodes the SMBUS Slave Address,
SMBUS Command, SMBUS Data Length, and PEC.
@param Length Signifies the number of bytes that this operation will
do. The maximum number of bytes can be revision specific
and operation specific.
@param Buffer Contains the value of data to execute to the SMBus slave
device. Not all operations require this argument. The
length of this buffer is identified by Length.
@param Status Return status for the executed command.
This is an optional parameter and may be NULL.
@return The actual number of bytes that are executed for this operation.
**/
UINTN
InternalSmBusExec (
IN EFI_SMBUS_OPERATION SmbusOperation,
IN UINTN SmBusAddress,
IN UINTN Length,
IN OUT VOID *Buffer,
OUT RETURN_STATUS *Status OPTIONAL
);
#endif
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