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.
17 const char *yaffs_nand_c_version =
18 "$Id: yaffs_nand.c,v 1.7 2007/02/14 01:09:06 wookey Exp $";
20 #include "yaffs_nand.h"
21 #include "yaffs_tagscompat.h"
22 #include "yaffs_tagsvalidity.h"
25 int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
27 yaffs_ExtendedTags * tags)
30 yaffs_ExtendedTags localTags;
32 int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
34 /* If there are no tags provided, use local tags to get prioritised gc working */
38 if (dev->readChunkWithTagsFromNAND)
39 result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
42 result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
47 tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){
49 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
50 yaffs_HandleChunkError(dev,bi);
56 int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
59 yaffs_ExtendedTags * tags)
61 chunkInNAND -= dev->chunkOffset;
65 tags->sequenceNumber = dev->sequenceNumber;
67 if (!yaffs_ValidateTags(tags)) {
69 (TSTR("Writing uninitialised tags" TENDSTR)));
73 (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
74 tags->objectId, tags->chunkId));
76 T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
80 if (dev->writeChunkWithTagsToNAND)
81 return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
84 return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
90 int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo)
92 blockNo -= dev->blockOffset;
95 if (dev->markNANDBlockBad)
96 return dev->markNANDBlockBad(dev, blockNo);
98 return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
101 int yaffs_QueryInitialBlockState(yaffs_Device * dev,
103 yaffs_BlockState * state,
104 unsigned *sequenceNumber)
106 blockNo -= dev->blockOffset;
108 if (dev->queryNANDBlock)
109 return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
111 return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
117 int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
122 blockInNAND -= dev->blockOffset;
125 dev->nBlockErasures++;
126 result = dev->eraseBlockInNAND(dev, blockInNAND);
131 int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
133 return dev->initialiseNAND(dev);