/** @file | |
Implementation of SmBusLib class library for DXE phase. | |
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR> | |
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 "InternalSmbusLib.h" | |
/** | |
Executes an SMBUS quick read command. | |
Executes an SMBUS quick read command on the SMBUS device specified by SmBusAddress. | |
Only the SMBUS slave address field of SmBusAddress is required. | |
If Status is not NULL, then the status of the executed command is returned in Status. | |
If PEC is set in SmBusAddress, then ASSERT(). | |
If Command in SmBusAddress is not zero, then ASSERT(). | |
If Length in SmBusAddress is not zero, then ASSERT(). | |
If any reserved bits of SmBusAddress are set, then ASSERT(). | |
@param SmBusAddress The address that encodes the SMBUS Slave Address, | |
SMBUS Command, SMBUS Data Length, and PEC. | |
@param Status Return status for the executed command. | |
This is an optional parameter and may be NULL. | |
RETURN_SUCCESS: The SMBUS command was executed. | |
RETURN_TIMEOUT: A timeout occurred while executing the | |
SMBUS command. | |
RETURN_DEVICE_ERROR: The request was not | |
completed because a failure reflected in the Host Status | |
Register bit. Device errors are a result of a transaction | |
collision, illegal command field, unclaimed cycle (host | |
initiated), or bus errors (collisions). | |
RETURN_UNSUPPORTED: The SMBus operation is not supported. | |
**/ | |
VOID | |
EFIAPI | |
SmBusQuickRead ( | |
IN UINTN SmBusAddress, | |
OUT RETURN_STATUS *Status OPTIONAL | |
) | |
{ | |
ASSERT (!SMBUS_LIB_PEC (SmBusAddress)); | |
ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0); | |
InternalSmBusExec (EfiSmbusQuickRead, SmBusAddress, 0, NULL, Status); | |
} | |
/** | |
Executes an SMBUS quick write command. | |
Executes an SMBUS quick write command on the SMBUS device specified by SmBusAddress. | |
Only the SMBUS slave address field of SmBusAddress is required. | |
If Status is not NULL, then the status of the executed command is returned in Status. | |
If PEC is set in SmBusAddress, then ASSERT(). | |
If Command in SmBusAddress is not zero, then ASSERT(). | |
If Length in SmBusAddress is not zero, then ASSERT(). | |
If any reserved bits of SmBusAddress are set, then ASSERT(). | |
@param SmBusAddress The address that encodes the SMBUS Slave Address, | |
SMBUS Command, SMBUS Data Length, and PEC. | |
@param Status Return status for the executed command. | |
This is an optional parameter and may be NULL. | |
RETURN_SUCCESS: The SMBUS command was executed. | |
RETURN_TIMEOUT: A timeout occurred while executing the | |
SMBUS command. | |
RETURN_DEVICE_ERROR: The request was not completed because | |
a failure reflected in the Host Status Register bit. | |
Device errors are a result of a transaction collision, | |
illegal command field, unclaimed cycle (host initiated), | |
or bus errors (collisions). | |
RETURN_UNSUPPORTED: The SMBus operation is not supported. | |
**/ | |
VOID | |
EFIAPI | |
SmBusQuickWrite ( | |
IN UINTN SmBusAddress, | |
OUT RETURN_STATUS *Status OPTIONAL | |
) | |
{ | |
ASSERT (!SMBUS_LIB_PEC (SmBusAddress)); | |
ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0); | |
InternalSmBusExec (EfiSmbusQuickWrite, SmBusAddress, 0, NULL, Status); | |
} | |
/** | |
Executes an SMBUS receive byte command. | |
Executes an SMBUS receive byte command on the SMBUS device specified by SmBusAddress. | |
Only the SMBUS slave address field of SmBusAddress is required. | |
The byte received from the SMBUS is returned. | |
If Status is not NULL, then the status of the executed command is returned in Status. | |
If Command in SmBusAddress is not zero, then ASSERT(). | |
If Length in SmBusAddress is not zero, then ASSERT(). | |
If any reserved bits of SmBusAddress are set, then ASSERT(). | |
@param SmBusAddress The address that encodes the SMBUS Slave Address, | |
SMBUS Command, SMBUS Data Length, and PEC. | |
@param Status Return status for the executed command. | |
This is an optional parameter and may be NULL. | |
RETURN_SUCCESS: The SMBUS command was executed. | |
RETURN_TIMEOUT: A timeout occurred while executing the | |
SMBUS command. | |
RETURN_DEVICE_ERROR: The request was not completed because | |
a failure reflected in the Host Status Register bit. Device | |
errors are a result of a transaction collision, illegal | |
command field, unclaimed cycle(host initiated), or bus | |
errors (collisions). | |
RETURN_CRC_ERROR: The checksum is not correct. (PEC is incorrect.) | |
RETURN_UNSUPPORTED: The SMBus operation is not supported. | |
@return The byte received from the SMBUS. | |
**/ | |
UINT8 | |
EFIAPI | |
SmBusReceiveByte ( | |
IN UINTN SmBusAddress, | |
OUT RETURN_STATUS *Status OPTIONAL | |
) | |
{ | |
UINT8 Byte; | |
ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0); | |
InternalSmBusExec (EfiSmbusReceiveByte, SmBusAddress, 1, &Byte, Status); | |
return Byte; | |
} | |
/** | |
Executes an SMBUS send byte command. | |
Executes an SMBUS send byte command on the SMBUS device specified by SmBusAddress. | |
The byte specified by Value is sent. | |
Only the SMBUS slave address field of SmBusAddress is required. Value is returned. | |
If Status is not NULL, then the status of the executed command is returned in Status. | |
If Command in SmBusAddress is not zero, then ASSERT(). | |
If Length in SmBusAddress is not zero, then ASSERT(). | |
If any reserved bits of SmBusAddress are set, then ASSERT(). | |
@param SmBusAddress The address that encodes the SMBUS Slave Address, | |
SMBUS Command, SMBUS Data Length, and PEC. | |
@param Value The 8-bit value to send. | |
@param Status Return status for the executed command. | |
This is an optional parameter and may be NULL. | |
RETURN_SUCCESS: The SMBUS command was executed. | |
RETURN_TIMEOUT: A timeout occurred while executing the | |
SMBUS command. | |
RETURN_DEVICE_ERROR: The request was not completed because | |
a failure reflected in the Host Status Register bit. Device | |
errors are a result of a transaction collision, illegal | |
command field, unclaimed cycle(host initiated), or bus | |
errors (collisions). | |
RETURN_CRC_ERROR: The checksum is not correct (PEC is incorrect) | |
RETURN_UNSUPPORTED: The SMBus operation is not supported. | |
@return The parameter of Value. | |
**/ | |
UINT8 | |
EFIAPI | |
SmBusSendByte ( | |
IN UINTN SmBusAddress, | |
IN UINT8 Value, | |
OUT RETURN_STATUS *Status OPTIONAL | |
) | |
{ | |
UINT8 Byte; | |
ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0); | |
Byte = Value; | |
InternalSmBusExec (EfiSmbusSendByte, SmBusAddress, 1, &Byte, Status); | |
return Value; | |
} | |
/** | |
Executes an SMBUS read data byte command. | |
Executes an SMBUS read data byte command on the SMBUS device specified by SmBusAddress. | |
Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required. | |
The 8-bit value read from the SMBUS is returned. | |
If Status is not NULL, then the status of the executed command is returned in Status. | |
If Length in SmBusAddress is not zero, then ASSERT(). | |
If any reserved bits of SmBusAddress are set, then ASSERT(). | |
@param SmBusAddress The address that encodes the SMBUS Slave Address, | |
SMBUS Command, SMBUS Data Length, and PEC. | |
@param Status Return status for the executed command. | |
This is an optional parameter and may be NULL. | |
RETURN_SUCCESS: The SMBUS command was executed. | |
RETURN_TIMEOUT: A timeout occurred while executing the | |
SMBUS command. | |
RETURN_DEVICE_ERROR: The request was not completed because | |
a failurereflected in the Host Status Register bit. Device | |
errors are a result of a transaction collision, illegal | |
command field, unclaimed cycle (host initiated), or bus | |
errors (collisions). | |
RETURN_CRC_ERROR: The checksum is not correct (PEC is incorrect) | |
RETURN_UNSUPPORTED: The SMBus operation is not supported. | |
@return The byte read from the SMBUS. | |
**/ | |
UINT8 | |
EFIAPI | |
SmBusReadDataByte ( | |
IN UINTN SmBusAddress, | |
OUT RETURN_STATUS *Status OPTIONAL | |
) | |
{ | |
UINT8 Byte; | |
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0); | |
InternalSmBusExec (EfiSmbusReadByte, SmBusAddress, 1, &Byte, Status); | |
return Byte; | |
} | |
/** | |
Executes an SMBUS write data byte command. | |
Executes an SMBUS write data byte command on the SMBUS device specified by SmBusAddress. | |
The 8-bit value specified by Value is written. | |
Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required. | |
Value is returned. | |
If Status is not NULL, then the status of the executed command is returned in Status. | |
If Length in SmBusAddress is not zero, then ASSERT(). | |
If any reserved bits of SmBusAddress are set, then ASSERT(). | |
@param SmBusAddress The address that encodes the SMBUS Slave Address, | |
SMBUS Command, SMBUS Data Length, and PEC. | |
@param Value The 8-bit value to write. | |
@param Status Return status for the executed command. | |
This is an optional parameter and may be NULL. | |
RETURN_SUCCESS: The SMBUS command was executed. | |
RETURN_TIMEOUT: A timeout occurred while executing the | |
SMBUS command. | |
RETURN_DEVICE_ERROR: The request was not completed because | |
a failure reflected in the Host Status Register bit. Device | |
errors are a result of a transaction collision, illegal | |
command field, unclaimed cycle host initiated), or bus | |
errors (collisions). | |
RETURN_CRC_ERROR: The checksum is not correct. (PEC is incorrect.) | |
RETURN_UNSUPPORTED: The SMBus operation is not supported. | |
@return The parameter of Value. | |
**/ | |
UINT8 | |
EFIAPI | |
SmBusWriteDataByte ( | |
IN UINTN SmBusAddress, | |
IN UINT8 Value, | |
OUT RETURN_STATUS *Status OPTIONAL | |
) | |
{ | |
UINT8 Byte; | |
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0); | |
Byte = Value; | |
InternalSmBusExec (EfiSmbusWriteByte, SmBusAddress, 1, &Byte, Status); | |
return Value; | |
} | |
/** | |
Executes an SMBUS read data word command. | |
Executes an SMBUS read data word command on the SMBUS device specified by SmBusAddress. | |
Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required. | |
The 16-bit value read from the SMBUS is returned. | |
If Status is not NULL, then the status of the executed command is returned in Status. | |
If Length in SmBusAddress is not zero, then ASSERT(). | |
If any reserved bits of SmBusAddress are set, then ASSERT(). | |
@param SmBusAddress The address that encodes the SMBUS Slave Address, | |
SMBUS Command, SMBUS Data Length, and PEC. | |
@param Status Return status for the executed command. | |
This is an optional parameter and may be NULL. | |
RETURN_SUCCESS: The SMBUS command was executed. | |
RETURN_TIMEOUT: A timeout occurred while executing the | |
SMBUS command. | |
RETURN_DEVICE_ERROR: The request was not completed because | |
a failure reflected in the Host Status Register bit. | |
Device errors are a result of a transaction collision, | |
illegal command field, unclaimed cycle (host initiated), | |
or bus errors (collisions). | |
RETURN_CRC_ERROR: The checksum is not correct. (PEC is | |
incorrect.) | |
RETURN_UNSUPPORTED: The SMBus operation is not supported. | |
@return The byte read from the SMBUS. | |
**/ | |
UINT16 | |
EFIAPI | |
SmBusReadDataWord ( | |
IN UINTN SmBusAddress, | |
OUT RETURN_STATUS *Status OPTIONAL | |
) | |
{ | |
UINT16 Word; | |
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0); | |
InternalSmBusExec (EfiSmbusReadWord, SmBusAddress, 2, &Word, Status); | |
return Word; | |
} | |
/** | |
Executes an SMBUS write data word command. | |
Executes an SMBUS write data word command on the SMBUS device specified by SmBusAddress. | |
The 16-bit value specified by Value is written. | |
Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required. | |
Value is returned. | |
If Status is not NULL, then the status of the executed command is returned in Status. | |
If Length in SmBusAddress is not zero, then ASSERT(). | |
If any reserved bits of SmBusAddress are set, then ASSERT(). | |
@param SmBusAddress The address that encodes the SMBUS Slave Address, | |
SMBUS Command, SMBUS Data Length, and PEC. | |
@param Value The 16-bit value to write. | |
@param Status Return status for the executed command. | |
This is an optional parameter and may be NULL. | |
RETURN_SUCCESS: The SMBUS command was executed. | |
RETURN_TIMEOUT: A timeout occurred while executing the SMBUS | |
command. | |
RETURN_DEVICE_ERROR: The request was not completed because | |
a failure reflected in the Host Status Register bit. | |
Device errors are a result of a transaction collision, | |
illegal command field, unclaimed cycle (host initiated), | |
or bus errors (collisions). | |
RETURN_CRC_ERROR: The checksum is not correct. | |
(PEC is incorrect.) | |
RETURN_UNSUPPORTED: The SMBus operation is not supported. | |
@return The parameter of Value. | |
**/ | |
UINT16 | |
EFIAPI | |
SmBusWriteDataWord ( | |
IN UINTN SmBusAddress, | |
IN UINT16 Value, | |
OUT RETURN_STATUS *Status OPTIONAL | |
) | |
{ | |
UINT16 Word; | |
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0); | |
Word = Value; | |
InternalSmBusExec (EfiSmbusWriteWord, SmBusAddress, 2, &Word, Status); | |
return Value; | |
} | |
/** | |
Executes an SMBUS process call command. | |
Executes an SMBUS process call command on the SMBUS device specified by SmBusAddress. | |
The 16-bit value specified by Value is written. | |
Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required. | |
The 16-bit value returned by the process call command is returned. | |
If Status is not NULL, then the status of the executed command is returned in Status. | |
If Length in SmBusAddress is not zero, then ASSERT(). | |
If any reserved bits of SmBusAddress are set, then ASSERT(). | |
@param SmBusAddress The address that encodes the SMBUS Slave Address, | |
SMBUS Command, SMBUS Data Length, and PEC. | |
@param Value The 16-bit value to write. | |
@param Status Return status for the executed command. | |
This is an optional parameter and may be NULL. | |
RETURN_SUCCESS: The SMBUS command was executed. | |
RETURN_TIMEOUT: A timeout occurred while executing the | |
SMBUS command. | |
RETURN_DEVICE_ERROR: The request was not completed because | |
a failure reflected in the Host Status Register bit. | |
Device errors are a result of a transaction collision, | |
illegal command field, unclaimed cycle (host initiated), | |
or bus errors (collisions). | |
RETURN_CRC_ERROR: The checksum is not correct. (PEC is | |
incorrect.) | |
RETURN_UNSUPPORTED: The SMBus operation is not supported. | |
@return The 16-bit value returned by the process call command. | |
**/ | |
UINT16 | |
EFIAPI | |
SmBusProcessCall ( | |
IN UINTN SmBusAddress, | |
IN UINT16 Value, | |
OUT RETURN_STATUS *Status OPTIONAL | |
) | |
{ | |
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0); | |
InternalSmBusExec (EfiSmbusProcessCall, SmBusAddress, 2, &Value, Status); | |
return Value; | |
} | |
/** | |
Executes an SMBUS read block command. | |
Executes an SMBUS read block command on the SMBUS device specified by SmBusAddress. | |
Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required. | |
Bytes are read from the SMBUS and stored in Buffer. | |
The number of bytes read is returned, and will never return a value larger than 32-bytes. | |
If Status is not NULL, then the status of the executed command is returned in Status. | |
It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read. | |
SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes. | |
If Length in SmBusAddress is not zero, then ASSERT(). | |
If Buffer is NULL, then ASSERT(). | |
If any reserved bits of SmBusAddress are set, then ASSERT(). | |
@param SmBusAddress The address that encodes the SMBUS Slave Address, | |
SMBUS Command, SMBUS Data Length, and PEC. | |
@param Buffer The pointer to the buffer to store the bytes read from | |
the SMBUS. | |
@param Status Return status for the executed command. | |
This is an optional parameter and may be NULL. | |
RETURN_SUCCESS: The SMBUS command was executed. | |
RETURN_TIMEOUT: A timeout occurred while executing the SMBUS | |
command. | |
RETURN_DEVICE_ERROR: The request was not completed because | |
a failure reflected in the Host Status Register bit. Device | |
errors are a result of a transaction collision, illegal | |
command field, unclaimed cycle (host initiated), or bus | |
errors (collisions). | |
RETURN_CRC_ERROR: The checksum is not correct. (PEC is | |
incorrect.) | |
RETURN_UNSUPPORTED: The SMBus operation is not supported. | |
@return The number of bytes read. | |
**/ | |
UINTN | |
EFIAPI | |
SmBusReadBlock ( | |
IN UINTN SmBusAddress, | |
OUT VOID *Buffer, | |
OUT RETURN_STATUS *Status OPTIONAL | |
) | |
{ | |
ASSERT (Buffer != NULL); | |
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0); | |
ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0); | |
return InternalSmBusExec (EfiSmbusReadBlock, SmBusAddress, 0x20, Buffer, Status); | |
} | |
/** | |
Executes an SMBUS write block command. | |
Executes an SMBUS write block command on the SMBUS device specified by SmBusAddress. | |
The SMBUS slave address, SMBUS command, and SMBUS length fields of SmBusAddress are required. | |
Bytes are written to the SMBUS from Buffer. | |
The number of bytes written is returned, and will never return a value larger than 32-bytes. | |
If Status is not NULL, then the status of the executed command is returned in Status. | |
If Length in SmBusAddress is zero or greater than 32, then ASSERT(). | |
If Buffer is NULL, then ASSERT(). | |
If any reserved bits of SmBusAddress are set, then ASSERT(). | |
@param SmBusAddress The address that encodes the SMBUS Slave Address, | |
MBUS Command, SMBUS Data Length, and PEC. | |
@param Buffer The pointer to the buffer to store the bytes read from | |
the SMBUS. | |
@param Status Return status for the executed command. | |
This is an optional parameter and may be NULL. | |
RETURN_TIMEOUT: A timeout occurred while executing the | |
SMBUS command. | |
RETURN_DEVICE_ERROR: The request was not completed because | |
a failure reflected in the Host Status Register bit. Device | |
errors are a result of a transaction collision, illegal | |
command field, unclaimed cycle (host initiated), or bus | |
errors (collisions). | |
RETURN_CRC_ERROR: The checksum is not correct. (PEC is | |
incorrect.) | |
RETURN_UNSUPPORTED: The SMBus operation is not supported. | |
@return The number of bytes written. | |
**/ | |
UINTN | |
EFIAPI | |
SmBusWriteBlock ( | |
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_LENGTH (SmBusAddress) <= 32); | |
ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0); | |
Length = SMBUS_LIB_LENGTH (SmBusAddress); | |
return InternalSmBusExec (EfiSmbusWriteBlock, SmBusAddress, Length, Buffer, Status); | |
} | |
/** | |
Executes an SMBUS block process call command. | |
Executes an SMBUS block process call command on the SMBUS device specified by SmBusAddress. | |
The SMBUS slave address, SMBUS command, and SMBUS length fields of SmBusAddress are required. | |
Bytes are written to the SMBUS from WriteBuffer. Bytes are then read from the SMBUS into ReadBuffer. | |
If Status is not NULL, then the status of the executed command is returned in Status. | |
It is the caller's responsibility to make sure ReadBuffer is large enough for the total number of bytes read. | |
SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes. | |
If Length in SmBusAddress is zero or greater than 32, then ASSERT(). | |
If WriteBuffer is NULL, then ASSERT(). | |
If ReadBuffer is NULL, then ASSERT(). | |
If any reserved bits of SmBusAddress are set, then ASSERT(). | |
@param SmBusAddress The address that encodes the SMBUS Slave Address, | |
SMBUS Command, SMBUS Data Length, and PEC. | |
@param WriteBuffer The pointer to the buffer of bytes to write to the SMBUS. | |
@param ReadBuffer The pointer to the buffer of bytes to read from the SMBUS. | |
@param Status Return status for the executed command. | |
This is an optional parameter and may be NULL. | |
RETURN_TIMEOUT: A timeout occurred while executing the | |
SMBUS command. | |
RETURN_DEVICE_ERROR: The request was not completed because | |
a failure reflected in the Host Status Register bit. Device | |
errors are a result of a transaction collision, illegal | |
command field, unclaimed cycle (host initiated), or bus | |
errors (collisions). | |
RETURN_CRC_ERROR: The checksum is not correct. (PEC is | |
incorrect.) | |
RETURN_UNSUPPORTED: The SMBus operation is not supported. | |
@return The number of bytes written. | |
**/ | |
UINTN | |
EFIAPI | |
SmBusBlockProcessCall ( | |
IN UINTN SmBusAddress, | |
IN VOID *WriteBuffer, | |
OUT VOID *ReadBuffer, | |
OUT RETURN_STATUS *Status OPTIONAL | |
) | |
{ | |
UINTN Length; | |
ASSERT (WriteBuffer != NULL); | |
ASSERT (ReadBuffer != NULL); | |
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) >= 1); | |
ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) <= 32); | |
ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0); | |
Length = SMBUS_LIB_LENGTH (SmBusAddress); | |
// | |
// Assuming that ReadBuffer is large enough to save another memory copy. | |
// | |
ReadBuffer = CopyMem (ReadBuffer, WriteBuffer, Length); | |
return InternalSmBusExec (EfiSmbusBWBRProcessCall, SmBusAddress, Length, ReadBuffer, Status); | |
} |