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 =
17 #include "yaffs_nand.h"
18 #include "yaffs_tagscompat.h"
19 #include "yaffs_tagsvalidity.h"
21 #include "yaffs_getblockinfo.h"
23 int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
25 yaffs_ExtendedTags *tags)
28 yaffs_ExtendedTags localTags;
30 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)
64 chunkInNAND -= dev->chunkOffset;
68 tags->sequenceNumber = dev->sequenceNumber;
70 if (!yaffs_ValidateTags(tags)) {
72 (TSTR("Writing uninitialised tags" TENDSTR)));
76 (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
77 tags->objectId, tags->chunkId));
79 T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
83 if (dev->writeChunkWithTagsToNAND)
84 return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
87 return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
93 int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo)
95 blockNo -= dev->blockOffset;
98 if (dev->markNANDBlockBad)
99 return dev->markNANDBlockBad(dev, blockNo);
101 return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
104 int yaffs_QueryInitialBlockState(yaffs_Device *dev,
106 yaffs_BlockState *state,
107 __u32 *sequenceNumber)
109 blockNo -= dev->blockOffset;
111 if (dev->queryNANDBlock)
112 return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
114 return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
120 int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
125 blockInNAND -= dev->blockOffset;
127 dev->nBlockErasures++;
129 result = dev->eraseBlockInNAND(dev, blockInNAND);
134 int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
136 return dev->initialiseNAND(dev);