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/** @file
This file contains SMBus related functions.
@copyright
Copyright (c) 1999 - 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 "MrcOemSmbus.h"
#ifdef NOSMBUS_BUILD
///
/// DDR3 1600 2GB single rank
///
const U8 SPDData[] =
{0x92, 0x11, 0x0B, 0x02, 0x03, 0x19, 0x02, 0x01, 0x03, 0x11, 0x01, 0x08, 0x0A, 0x00, 0xFE, 0x00, /// 00-15
0x69, 0x78, 0x69, 0x30, 0x69, 0x11, 0x18, 0x81, 0x00, 0x05, 0x3C, 0x3C, 0x00, 0xF0, 0x83, 0x01, /// 16-31
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /// 32-47
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x11, 0x61, 0x00, /// 48-63
0x00, 0x00, 0x00, 0x00, 0x00, 0xC0, 0x00, 0x00, 0x00, 0x80 /// 64-73
};
#endif
/**
@brief
Perform a byte read from the specified SMBus device address.
@param[in] SmbusBaseAddress - The SMBus base address.
@param[in] SmBusDeviceAddress - SMBus device address to read from.
@param[in] Offset - Byte offset to read from.
@param[out] Value - Location to store read value.
@retval: mrcSuccess if the read is successful, otherwise mrcFail and the read data is set to zero.
**/
MrcStatus
MrcOemSmbusRead8 (
IN const U32 SmbusBaseAddress,
IN const U8 SmBusDeviceAddress,
IN const U8 Offset,
OUT U8 *const Value
)
{
MrcStatus Status;
RETURN_STATUS EfiStatus;
#ifdef NOSMBUS_BUILD
if (SmBusDeviceAddress == 0xA0) {
//
// For CH0 - DIMM0 only
//
*Value = SPDData[Offset];
Status = mrcSuccess;
} else {
Status = mrcFail;
}
#else
*Value = SmBusReadDataByte (SmBusDeviceAddress | ((U32) Offset << 8), &EfiStatus);
if (EfiStatus == RETURN_SUCCESS) {
Status = mrcSuccess;
} else {
Status = mrcFail;
}
#endif // NOSMBUS_BUILD
if (Status != mrcSuccess) {
*Value = 0;
}
return Status;
}
/**
@brief
Perform a byte write to the specified SMBus device address.
@param[in] SmbusBaseAddress - The SMBus base address.
@param[in] SmBusDeviceAddress - SMBus device address to write to.
@param[in] Offset - Byte offset to write to.
@param[in] Value - The value to write.
@retval: mrcSuccess if the write is successful, otherwise mrcFail.
**/
MrcStatus
MrcOemSmbusWrite8 (
IN const U32 SmbusBaseAddress,
IN const U8 SmBusDeviceAddress,
IN const U8 Offset,
IN U8 Value
)
{
MrcStatus Status;
RETURN_STATUS EfiStatus;
SmBusWriteDataByte (SmBusDeviceAddress | ((U32) Offset << 8), Value, &EfiStatus);
Status = (EfiStatus == RETURN_SUCCESS) ? mrcSuccess : mrcFail;
return Status;
}
/**
@brief
Perform a word read from the specified SMBus device address.
@param[in] SmbusBaseAddress - The SMBus base address.
@param[in] SmBusDeviceAddress - SMBus device address to read from.
@param[in] Offset - Offset to read from.
@param[out] Value - Location to store read value.
@retval: mrcSuccess if the read is successful, otherwise mrcFail and the read data is set to zero.
**/
MrcStatus
MrcOemSmbusRead16 (
IN const U32 SmbusBaseAddress,
IN const U8 SmBusDeviceAddress,
IN const U8 Offset,
OUT U16 *const Value
)
{
MrcStatus Status;
RETURN_STATUS EfiStatus;
#ifdef NOSMBUS_BUILD
if (SmBusDeviceAddress == 0xA0) {
//
// For CH0 - DIMM0 only
//
*Value = SPDData[Offset];
Status = mrcSuccess;
} else {
Status = mrcFail;
}
#else
*Value = SmBusReadDataWord (SmBusDeviceAddress | ((U32) Offset << 8), &EfiStatus);
if (EfiStatus == RETURN_SUCCESS) {
Status = mrcSuccess;
} else {
Status = mrcFail;
}
#endif // NOSMBUS_BUILD
if (Status != mrcSuccess) {
*Value = 0;
}
return Status;
}
/**
@brief
Perform a word write to the specified SMBus device address.
@param[in] SmbusBaseAddress - The SMBus base address.
@param[in] SmBusDeviceAddress - SMBus device address to write to.
@param[in] Offset - Offset to write to.
@param[in] Value - The value to write.
@retval: mrcSuccess if the write is successful, otherwise mrcFail.
**/
MrcStatus
MrcOemSmbusWrite16 (
IN const U32 SmbusBaseAddress,
IN const U8 SmBusDeviceAddress,
IN const U8 Offset,
IN U16 Value
)
{
MrcStatus Status;
RETURN_STATUS EfiStatus;
SmBusWriteDataWord (SmBusDeviceAddress | ((U32) Offset << 8), Value, &EfiStatus);
Status = (EfiStatus == RETURN_SUCCESS) ? mrcSuccess : mrcFail;
return Status;
}
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