diff options
Diffstat (limited to 'target/linux/generic-2.6/files-2.6.26/fs/yaffs2/yaffs_nand.c')
-rw-r--r-- | target/linux/generic-2.6/files-2.6.26/fs/yaffs2/yaffs_nand.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/files-2.6.26/fs/yaffs2/yaffs_nand.c b/target/linux/generic-2.6/files-2.6.26/fs/yaffs2/yaffs_nand.c new file mode 100644 index 000000000..4e250338d --- /dev/null +++ b/target/linux/generic-2.6/files-2.6.26/fs/yaffs2/yaffs_nand.c @@ -0,0 +1,134 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2007 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +const char *yaffs_nand_c_version = + "$Id: yaffs_nand.c,v 1.7 2007-02-14 01:09:06 wookey Exp $"; + +#include "yaffs_nand.h" +#include "yaffs_tagscompat.h" +#include "yaffs_tagsvalidity.h" + + +int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, + __u8 * buffer, + yaffs_ExtendedTags * tags) +{ + int result; + yaffs_ExtendedTags localTags; + + int realignedChunkInNAND = chunkInNAND - dev->chunkOffset; + + /* If there are no tags provided, use local tags to get prioritised gc working */ + if(!tags) + tags = &localTags; + + if (dev->readChunkWithTagsFromNAND) + result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer, + tags); + else + result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev, + realignedChunkInNAND, + buffer, + tags); + if(tags && + tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){ + + yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock); + yaffs_HandleChunkError(dev,bi); + } + + return result; +} + +int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev, + int chunkInNAND, + const __u8 * buffer, + yaffs_ExtendedTags * tags) +{ + chunkInNAND -= dev->chunkOffset; + + + if (tags) { + tags->sequenceNumber = dev->sequenceNumber; + tags->chunkUsed = 1; + if (!yaffs_ValidateTags(tags)) { + T(YAFFS_TRACE_ERROR, + (TSTR("Writing uninitialised tags" TENDSTR))); + YBUG(); + } + T(YAFFS_TRACE_WRITE, + (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND, + tags->objectId, tags->chunkId)); + } else { + T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR))); + YBUG(); + } + + if (dev->writeChunkWithTagsToNAND) + return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer, + tags); + else + return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev, + chunkInNAND, + buffer, + tags); +} + +int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo) +{ + blockNo -= dev->blockOffset; + +; + if (dev->markNANDBlockBad) + return dev->markNANDBlockBad(dev, blockNo); + else + return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo); +} + +int yaffs_QueryInitialBlockState(yaffs_Device * dev, + int blockNo, + yaffs_BlockState * state, + unsigned *sequenceNumber) +{ + blockNo -= dev->blockOffset; + + if (dev->queryNANDBlock) + return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber); + else + return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo, + state, + sequenceNumber); +} + + +int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, + int blockInNAND) +{ + int result; + + blockInNAND -= dev->blockOffset; + + + dev->nBlockErasures++; + result = dev->eraseBlockInNAND(dev, blockInNAND); + + return result; +} + +int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev) +{ + return dev->initialiseNAND(dev); +} + + + |