/* * YAFFS: Yet another FFS. A NAND-flash specific file system.  * * Copyright (C) 2002 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 1.5 2006/11/08 09:52:12 charles 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);}