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 =
15 "$Id: yaffs_nand.c,v 1.9 2008-05-05 07:58:58 charles Exp $";
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;
32 /* If there are no tags provided, use local tags to get prioritised gc working */
36 if (dev->readChunkWithTagsFromNAND)
37 result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
40 result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
45 tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){
47 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
48 yaffs_HandleChunkError(dev,bi);
54 int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
57 yaffs_ExtendedTags * tags)
59 chunkInNAND -= dev->chunkOffset;
63 tags->sequenceNumber = dev->sequenceNumber;
65 if (!yaffs_ValidateTags(tags)) {
67 (TSTR("Writing uninitialised tags" TENDSTR)));
71 (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
72 tags->objectId, tags->chunkId));
74 T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
78 if (dev->writeChunkWithTagsToNAND)
79 return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
82 return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
88 int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo)
90 blockNo -= dev->blockOffset;
93 if (dev->markNANDBlockBad)
94 return dev->markNANDBlockBad(dev, blockNo);
96 return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
99 int yaffs_QueryInitialBlockState(yaffs_Device * dev,
101 yaffs_BlockState * state,
102 __u32 *sequenceNumber)
104 blockNo -= dev->blockOffset;
106 if (dev->queryNANDBlock)
107 return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
109 return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
115 int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
120 blockInNAND -= dev->blockOffset;
123 dev->nBlockErasures++;
124 result = dev->eraseBlockInNAND(dev, blockInNAND);
129 int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
131 return dev->initialiseNAND(dev);