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/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
* Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "yaffs_nand.h"
#include "yaffs_tagscompat.h"
#include "yaffs_tagsvalidity.h"
#include "yaffs_getblockinfo.h"
int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
__u8 *buffer,
yaffs_ExtendedTags *tags)
{
int result;
yaffs_ExtendedTags localTags;
int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
dev->nPageReads++;
/* If there are no tags provided, use local tags to get prioritised gc working */
if (!tags)
tags = &localTags;
if (dev->param.readChunkWithTagsFromNAND)
result = dev->param.readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
tags);
else
result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
realignedChunkInNAND,
buffer,
tags);
if (tags &&
tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR) {
yaffs_BlockInfo *bi;
bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->param.nChunksPerBlock);
yaffs_HandleChunkError(dev, bi);
}
return result;
}
int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,
int chunkInNAND,
const __u8 *buffer,
yaffs_ExtendedTags *tags)
{
dev->nPageWrites++;
chunkInNAND -= dev->chunkOffset;
if (tags) {
tags->sequenceNumber = dev->sequenceNumber;
tags->chunkUsed = 1;
if (!yaffs_ValidateTags(tags)) {
T(YAFFS_TRACE_ERROR,
(TSTR("Writing uninitialised tags" TENDSTR)));
YBUG();
}
T(YAFFS_TRACE_WRITE,
(TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
tags->objectId, tags->chunkId));
} else {
T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
YBUG();
}
if (dev->param.writeChunkWithTagsToNAND)
return dev->param.writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
tags);
else
return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
chunkInNAND,
buffer,
tags);
}
int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo)
{
blockNo -= dev->blockOffset;
if (dev->param.markNANDBlockBad)
return dev->param.markNANDBlockBad(dev, blockNo);
else
return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
}
int yaffs_QueryInitialBlockState(yaffs_Device *dev,
int blockNo,
yaffs_BlockState *state,
__u32 *sequenceNumber)
{
blockNo -= dev->blockOffset;
if (dev->param.queryNANDBlock)
return dev->param.queryNANDBlock(dev, blockNo, state, sequenceNumber);
else
return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
state,
sequenceNumber);
}
int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
int blockInNAND)
{
int result;
blockInNAND -= dev->blockOffset;
dev->nBlockErasures++;
result = dev->param.eraseBlockInNAND(dev, blockInNAND);
return result;
}
int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
{
if(dev->param.initialiseNAND)
return dev->param.initialiseNAND(dev);
return YAFFS_OK;
}
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