2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2010 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 #include "yaffs_nand.h"
15 #include "yaffs_tagscompat.h"
16 #include "yaffs_tagsvalidity.h"
18 #include "yaffs_getblockinfo.h"
20 int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
22 yaffs_ExtendedTags *tags)
25 yaffs_ExtendedTags localTags;
27 int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
31 /* If there are no tags provided, use local tags to get prioritised gc working */
35 if (dev->param.readChunkWithTagsFromNAND)
36 result = dev->param.readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
39 result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
44 tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR) {
47 bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->param.nChunksPerBlock);
48 yaffs_HandleChunkError(dev, bi);
54 int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,
57 yaffs_ExtendedTags *tags)
62 chunkInNAND -= dev->chunkOffset;
66 tags->sequenceNumber = dev->sequenceNumber;
68 if (!yaffs_ValidateTags(tags)) {
70 (TSTR("Writing uninitialised tags" TENDSTR)));
74 (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
75 tags->objectId, tags->chunkId));
77 T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
81 if (dev->param.writeChunkWithTagsToNAND)
82 return dev->param.writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
85 return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
91 int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo)
93 blockNo -= dev->blockOffset;
96 if (dev->param.markNANDBlockBad)
97 return dev->param.markNANDBlockBad(dev, blockNo);
99 return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
102 int yaffs_QueryInitialBlockState(yaffs_Device *dev,
104 yaffs_BlockState *state,
105 __u32 *sequenceNumber)
107 blockNo -= dev->blockOffset;
109 if (dev->param.queryNANDBlock)
110 return dev->param.queryNANDBlock(dev, blockNo, state, sequenceNumber);
112 return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
118 int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
123 blockInNAND -= dev->blockOffset;
125 dev->nBlockErasures++;
127 result = dev->param.eraseBlockInNAND(dev, blockInNAND);
132 int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
134 if(dev->param.initialiseNAND)
135 return dev->param.initialiseNAND(dev);