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/** @file
This file contains routines that support PCH SMBUS FUNCTION
@copyright
Copyright (c) 2011 - 2012 Intel Corporation. All rights reserved
This software and associated documentation (if any) is furnished
under a license and may only be used or copied in accordance
with the terms of the license. Except as permitted by such
license, no part of this software or documentation may be
reproduced, stored in a retrieval system, or transmitted in any
form or by any means without the express written consent of
Intel Corporation.
This file contains an 'Intel Peripheral Driver' and uniquely
identified as "Intel Reference Module" and is
licensed for Intel CPUs and chipsets under the terms of your
license agreement with Intel or your vendor. This file may
be modified by the user, subject to additional terms of the
license agreement
**/
#include "PchSmbusLib.h"
/**
This function provides a standard way to execute Smbus sequential
I2C Read. This function allows the PCH to perform block reads to
certain I2C devices, such as serial E2PROMs. Typically these data
bytes correspond to an offset (address) within the serial memory
chips.
@param[in] SmBusAddress Address that encodes the SMBUS Slave Address,
SMBUS Command, SMBUS Data Length, and PEC.
@param[out] Buffer Pointer to the buffer to store the bytes read
from the SMBUS
@param[out] Status eturn status for the executed command.
@retval UINTN The number of bytes read
**/
UINTN
EFIAPI
SmBusSeqI2CRead (
IN UINTN SmBusAddress,
OUT VOID *Buffer,
OUT RETURN_STATUS * Status OPTIONAL
)
{
UINTN Length;
ASSERT (Buffer != NULL);
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) >= 1);
ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);
Length = SMBUS_LIB_LENGTH (SmBusAddress);
return InternalSmBusExec (EfiSmbusReadByte, SmBusAddress, Length, Buffer, Status);
}
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