2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2007 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 const char *yaffs_nand_c_version =
16 #include "yaffs_nand.h"
17 #include "yaffs_tagscompat.h"
18 #include "yaffs_tagsvalidity.h"
21 int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
23 yaffs_ExtendedTags * tags)
26 yaffs_ExtendedTags localTags;
28 int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
30 /* If there are no tags provided, use local tags to get prioritised gc working */
34 if (dev->readChunkWithTagsFromNAND)
35 result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
38 result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
43 tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){
45 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
46 yaffs_HandleChunkError(dev,bi);
52 int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
55 yaffs_ExtendedTags * tags)
57 chunkInNAND -= dev->chunkOffset;
61 tags->sequenceNumber = dev->sequenceNumber;
63 if (!yaffs_ValidateTags(tags)) {
65 (TSTR("Writing uninitialised tags" TENDSTR)));
69 (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
70 tags->objectId, tags->chunkId));
72 T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
76 if (dev->writeChunkWithTagsToNAND)
77 return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
80 return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
86 int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo)
88 blockNo -= dev->blockOffset;
91 if (dev->markNANDBlockBad)
92 return dev->markNANDBlockBad(dev, blockNo);
94 return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
97 int yaffs_QueryInitialBlockState(yaffs_Device * dev,
99 yaffs_BlockState * state,
100 unsigned *sequenceNumber)
102 blockNo -= dev->blockOffset;
104 if (dev->queryNANDBlock)
105 return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
107 return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
113 int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
118 blockInNAND -= dev->blockOffset;
121 dev->nBlockErasures++;
122 result = dev->eraseBlockInNAND(dev, blockInNAND);
127 int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
129 return dev->initialiseNAND(dev);