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/** @file NorFlashBlockIoDxe.c
Copyright (c) 2011, ARM Ltd. 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 <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include "NorFlashDxe.h"
EFI_STATUS
EFIAPI
NorFlashBlkIoInitialize (
IN NOR_FLASH_INSTANCE* Instance
)
{
UINT32 Reply;
EFI_STATUS Status = EFI_SUCCESS;
DEBUG((DEBUG_BLKIO,"NorFlashBlkIoInitialize()\n"));
//
// Verify that there is a physical hardware device where we expect it to be.
//
// Read a specific CFI query that returns back "QRY"
// This ensures that there is really a device present there
SEND_NOR_COMMAND (Instance->BaseAddress, 0, P30_CMD_READ_CFI_QUERY);
// Read CFI 'QRY' data
Status = NorFlashReadCfiData (Instance->BaseAddress, P30_CFI_ADDR_QUERY_UNIQUE_QRY, 3, &Reply);
if (EFI_ERROR(Status)) {
return Status;
}
if (Reply != CFI_QRY) {
DEBUG((EFI_D_ERROR, "NorFlashBlkIoInitialize: CFI QRY=0x%x (expected 0x595251)\n", Reply));
return EFI_DEVICE_ERROR;
}
// Reset the device
Status = NorFlashBlockIoReset (&Instance->BlockIoProtocol, FALSE);
if (EFI_ERROR(Status)) {
return Status;
}
Instance->Initialized = TRUE;
return EFI_SUCCESS;
}
//
// BlockIO Protocol function EFI_BLOCK_IO_PROTOCOL.Reset
//
EFI_STATUS
EFIAPI
NorFlashBlockIoReset (
IN EFI_BLOCK_IO_PROTOCOL *This,
IN BOOLEAN ExtendedVerification
)
{
NOR_FLASH_INSTANCE *Instance;
Instance = INSTANCE_FROM_BLKIO_THIS(This);
DEBUG ((DEBUG_BLKIO, "NorFlashBlockIoReset(MediaId=0x%x)\n", This->Media->MediaId));
return NorFlashReset(Instance);
}
//
// BlockIO Protocol function EFI_BLOCK_IO_PROTOCOL.ReadBlocks
//
EFI_STATUS
EFIAPI
NorFlashBlockIoReadBlocks (
IN EFI_BLOCK_IO_PROTOCOL *This,
IN UINT32 MediaId,
IN EFI_LBA Lba,
IN UINTN BufferSizeInBytes,
OUT VOID *Buffer
)
{
NOR_FLASH_INSTANCE *Instance;
EFI_STATUS Status;
Instance = INSTANCE_FROM_BLKIO_THIS(This);
DEBUG ((DEBUG_BLKIO, "NorFlashBlockIoReadBlocks(MediaId=0x%x, Lba=%ld, BufferSize=0x%x bytes (%d kB), BufferPtr @ 0x%08x)\n", MediaId, Lba, BufferSizeInBytes, Buffer));
if( !This->Media->MediaPresent ) {
Status = EFI_NO_MEDIA;
} else if( This->Media->MediaId != MediaId ) {
Status = EFI_MEDIA_CHANGED;
} else {
Status = NorFlashReadBlocks(Instance,Lba,BufferSizeInBytes,Buffer);
}
return Status;
}
//
// BlockIO Protocol function EFI_BLOCK_IO_PROTOCOL.WriteBlocks
//
EFI_STATUS
EFIAPI
NorFlashBlockIoWriteBlocks (
IN EFI_BLOCK_IO_PROTOCOL *This,
IN UINT32 MediaId,
IN EFI_LBA Lba,
IN UINTN BufferSizeInBytes,
IN VOID *Buffer
)
{
NOR_FLASH_INSTANCE *Instance;
EFI_STATUS Status;
Instance = INSTANCE_FROM_BLKIO_THIS(This);
DEBUG ((DEBUG_BLKIO, "NorFlashBlockIoWriteBlocks(MediaId=0x%x, Lba=%ld, BufferSize=0x%x bytes (%d kB), BufferPtr @ 0x%08x)\n", MediaId, Lba, BufferSizeInBytes, Buffer));
if( !This->Media->MediaPresent ) {
Status = EFI_NO_MEDIA;
} else if( This->Media->MediaId != MediaId ) {
Status = EFI_MEDIA_CHANGED;
} else if( This->Media->ReadOnly ) {
Status = EFI_WRITE_PROTECTED;
} else {
Status = NorFlashWriteBlocks(Instance,Lba,BufferSizeInBytes,Buffer);
}
return Status;
}
//
// BlockIO Protocol function EFI_BLOCK_IO_PROTOCOL.FlushBlocks
//
EFI_STATUS
EFIAPI
NorFlashBlockIoFlushBlocks (
IN EFI_BLOCK_IO_PROTOCOL *This
)
{
// No Flush required for the NOR Flash driver
// because cache operations are not permitted.
DEBUG ((DEBUG_BLKIO, "NorFlashBlockIoFlushBlocks: Function NOT IMPLEMENTED (not required).\n"));
// Nothing to do so just return without error
return EFI_SUCCESS;
}
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