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135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
/*
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* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2007 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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const char *yaffs_nand_c_version =
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"$Id: yaffs_nand.c,v 1.7 2007-02-14 01:09:06 wookey Exp $";
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#include "yaffs_nand.h"
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#include "yaffs_tagscompat.h"
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#include "yaffs_tagsvalidity.h"
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int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
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__u8 * buffer,
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yaffs_ExtendedTags * tags)
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{
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int result;
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yaffs_ExtendedTags localTags;
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int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
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/* If there are no tags provided, use local tags to get prioritised gc working */
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if(!tags)
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tags = &localTags;
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if (dev->readChunkWithTagsFromNAND)
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result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
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tags);
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else
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result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
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realignedChunkInNAND,
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buffer,
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tags);
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if(tags &&
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tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){
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yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
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yaffs_HandleChunkError(dev,bi);
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}
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return result;
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}
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int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
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int chunkInNAND,
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const __u8 * buffer,
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yaffs_ExtendedTags * tags)
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{
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chunkInNAND -= dev->chunkOffset;
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if (tags) {
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tags->sequenceNumber = dev->sequenceNumber;
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tags->chunkUsed = 1;
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if (!yaffs_ValidateTags(tags)) {
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T(YAFFS_TRACE_ERROR,
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(TSTR("Writing uninitialised tags" TENDSTR)));
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YBUG();
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}
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T(YAFFS_TRACE_WRITE,
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(TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
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tags->objectId, tags->chunkId));
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} else {
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T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
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YBUG();
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}
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if (dev->writeChunkWithTagsToNAND)
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return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
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tags);
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else
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return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
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chunkInNAND,
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buffer,
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tags);
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}
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int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo)
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{
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blockNo -= dev->blockOffset;
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;
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if (dev->markNANDBlockBad)
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return dev->markNANDBlockBad(dev, blockNo);
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else
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return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
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}
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int yaffs_QueryInitialBlockState(yaffs_Device * dev,
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int blockNo,
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yaffs_BlockState * state,
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unsigned *sequenceNumber)
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{
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blockNo -= dev->blockOffset;
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if (dev->queryNANDBlock)
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return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
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else
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return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
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state,
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sequenceNumber);
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}
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int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
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int blockInNAND)
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{
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int result;
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blockInNAND -= dev->blockOffset;
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dev->nBlockErasures++;
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result = dev->eraseBlockInNAND(dev, blockInNAND);
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return result;
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}
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int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
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{
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return dev->initialiseNAND(dev);
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}
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