mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-25 00:30:37 +02:00
35c3e37724
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15248 3c298f89-4303-0410-b956-a3cf2f4a3e73
135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
/*
|
|
* 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);
|
|
}
|
|
|
|
|
|
|