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/** @file
Copyright (c) 2004 - 2016, 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 that 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 <PiDxe.h>
#include <Library/FlashDeviceLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Guid/EventGroup.h>
#include <Library/SpiFlash.H>
#define FLASH_SIZE 0x400000
#define FLASH_DEVICE_BASE_ADDRESS (0xFFFFFFFF-FLASH_SIZE+1)
UINTN FlashDeviceBase = FLASH_DEVICE_BASE_ADDRESS;
EFI_SPI_PROTOCOL *mSpiProtocol = NULL;
EFI_STATUS
SpiFlashErase (
UINT8 *BaseAddress,
UINTN NumBytes
)
{
EFI_STATUS Status = EFI_SUCCESS;
UINT32 SectorSize;
UINT32 SpiAddress;
SpiAddress = (UINT32)(UINTN)(BaseAddress) - (UINT32)FlashDeviceBase;
SectorSize = SECTOR_SIZE_4KB;
while ( (NumBytes > 0) && (NumBytes <= MAX_FWH_SIZE) ) {
Status = mSpiProtocol->Execute (
mSpiProtocol,
SPI_SERASE,
SPI_WREN,
FALSE,
TRUE,
FALSE,
(UINT32) SpiAddress,
0,
NULL,
EnumSpiRegionBios
);
if (EFI_ERROR (Status)) {
break;
}
SpiAddress += SectorSize;
NumBytes -= SectorSize;
}
return Status;
}
EFI_STATUS
SpiFlashBlockErase (
UINT8 *BaseAddress,
UINTN NumBytes
)
{
EFI_STATUS Status = EFI_SUCCESS;
UINT32 SectorSize;
UINT32 SpiAddress;
SpiAddress = (UINT32)(UINTN)(BaseAddress) - (UINT32)FlashDeviceBase;
SectorSize = SECTOR_SIZE_64KB;
while ( (NumBytes > 0) && (NumBytes <= MAX_FWH_SIZE) ) {
Status = mSpiProtocol->Execute (
mSpiProtocol,
SPI_BERASE,
SPI_WREN,
FALSE,
TRUE,
FALSE,
(UINT32) SpiAddress,
0,
NULL,
EnumSpiRegionBios
);
if (EFI_ERROR (Status)) {
break;
}
SpiAddress += SectorSize;
NumBytes -= SectorSize;
}
return Status;
}
static
EFI_STATUS
SpiFlashWrite (
UINT8 *DstBufferPtr,
UINT8 *Byte,
IN UINTN Length
)
{
EFI_STATUS Status;
UINT32 NumBytes = (UINT32)Length;
UINT8* pBuf8 = Byte;
UINT32 SpiAddress;
SpiAddress = (UINT32)(UINTN)(DstBufferPtr) - (UINT32)FlashDeviceBase;
Status = mSpiProtocol->Execute (
mSpiProtocol,
SPI_PROG,
SPI_WREN,
TRUE,
TRUE,
TRUE,
(UINT32)SpiAddress,
NumBytes,
pBuf8,
EnumSpiRegionBios
);
return Status;
}
/**
Read the Serial Flash Status Registers.
@param SpiStatus Pointer to a caller-allocated UINT8. On successful return, it contains the
status data read from the Serial Flash Status Register.
@retval EFI_SUCCESS Operation success, status is returned in SpiStatus.
@retval EFI_DEVICE_ERROR The block device is not functioning correctly and the operation failed.
**/
EFI_STATUS
ReadStatusRegister (
UINT8 *SpiStatus
)
{
EFI_STATUS Status;
Status = mSpiProtocol->Execute (
mSpiProtocol,
SPI_RDSR,
SPI_WREN,
TRUE,
FALSE,
FALSE,
0,
1,
SpiStatus,
EnumSpiRegionBios
);
return Status;
}
EFI_STATUS
SpiFlashLock (
IN UINT8 *BaseAddress,
IN UINTN NumBytes,
IN BOOLEAN Lock
)
{
EFI_STATUS Status;
UINT8 SpiData;
UINT8 SpiStatus;
if (Lock) {
SpiData = SF_SR_WPE;
} else {
SpiData = 0;
}
//
// Always disable block protection to workaround tool issue.
// Feature may be re-enabled in a future bios.
//
SpiData = 0;
Status = mSpiProtocol->Execute (
mSpiProtocol,
SPI_WRSR,
SPI_EWSR,
TRUE,
TRUE,
TRUE,
0,
1,
&SpiData,
EnumSpiRegionBios
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = ReadStatusRegister (&SpiStatus);
if (EFI_ERROR (Status)) {
return Status;
}
if ((SpiStatus & SpiData) != SpiData) {
Status = EFI_DEVICE_ERROR;
}
return Status;
}
/**
Read NumBytes bytes of data from the address specified by
PAddress into Buffer.
@param[in] PAddress The starting physical address of the read.
@param[in,out] NumBytes On input, the number of bytes to read. On output, the number
of bytes actually read.
@param[out] Buffer The destination data buffer for the read.
@retval EFI_SUCCESS. Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceRead (
IN UINTN PAddress,
IN OUT UINTN *NumBytes,
OUT UINT8 *Buffer
)
{
CopyMem(Buffer, (VOID*)PAddress, *NumBytes);
return EFI_SUCCESS;
}
/**
Write NumBytes bytes of data from Buffer to the address specified by
PAddresss.
@param[in] PAddress The starting physical address of the write.
@param[in,out] NumBytes On input, the number of bytes to write. On output,
the actual number of bytes written.
@param[in] Buffer The source data buffer for the write.
@retval EFI_SUCCESS. Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceWrite (
IN UINTN PAddress,
IN OUT UINTN *NumBytes,
IN UINT8 *Buffer
)
{
EFI_STATUS Status;
Status = SpiFlashWrite((UINT8 *)PAddress, Buffer, *NumBytes);
return Status;
}
/**
Erase the block staring at PAddress.
@param[in] PAddress The starting physical address of the block to be erased.
This library assume that caller garantee that the PAddress
is at the starting address of this block.
@param[in] LbaLength The length of the logical block to be erased.
@retval EFI_SUCCESS. Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceBlockErase (
IN UINTN PAddress,
IN UINTN LbaLength
)
{
EFI_STATUS Status;
Status = SpiFlashBlockErase((UINT8 *)PAddress, LbaLength);
return Status;
}
/**
Lock or unlock the block staring at PAddress.
@param[in] PAddress The starting physical address of region to be (un)locked.
@param[in] LbaLength The length of the logical block to be erased.
@param[in] Lock TRUE to lock. FALSE to unlock.
@retval EFI_SUCCESS. Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
LibFvbFlashDeviceBlockLock (
IN UINTN PAddress,
IN UINTN LbaLength,
IN BOOLEAN Lock
)
{
EFI_STATUS Status;
Status = SpiFlashLock((UINT8*)PAddress, LbaLength, Lock);
return Status;
}
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