2 * YAFFS: Yet another FFS. A NAND-flash specific file system.
4 * Copyright (C) 2002 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.
15 const char *yaffs_nand_c_version =
16 "$Id: yaffs_nand.c,v 1.2 2006-09-21 08:13:59 charles Exp $";
18 #include "yaffs_nand.h"
19 #include "yaffs_tagscompat.h"
20 #include "yaffs_tagsvalidity.h"
23 int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
25 yaffs_ExtendedTags * tags)
29 int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
31 if (dev->readChunkWithTagsFromNAND)
32 result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
35 result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
40 tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){
42 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
49 int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
52 yaffs_ExtendedTags * tags)
54 chunkInNAND -= dev->chunkOffset;
58 tags->sequenceNumber = dev->sequenceNumber;
60 if (!yaffs_ValidateTags(tags)) {
62 (TSTR("Writing uninitialised tags" TENDSTR)));
66 (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
67 tags->objectId, tags->chunkId));
69 T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
73 if (dev->writeChunkWithTagsToNAND)
74 return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
77 return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
83 int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo)
85 blockNo -= dev->blockOffset;
88 if (dev->markNANDBlockBad)
89 return dev->markNANDBlockBad(dev, blockNo);
91 return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
94 int yaffs_QueryInitialBlockState(yaffs_Device * dev,
96 yaffs_BlockState * state,
97 unsigned *sequenceNumber)
99 blockNo -= dev->blockOffset;
101 if (dev->queryNANDBlock)
102 return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
104 return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
110 int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
115 blockInNAND -= dev->blockOffset;
118 dev->nBlockErasures++;
119 result = dev->eraseBlockInNAND(dev, blockInNAND);
121 /* If at first we don't succeed, try again *once*.*/
123 result = dev->eraseBlockInNAND(dev, blockInNAND);
127 int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
129 return dev->initialiseNAND(dev);