/* * 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. *//* mtd interface for YAFFS2 */const char *yaffs_mtdif2_c_version =    "$Id: yaffs_mtdif2.c,v 1.22 2008/11/02 22:47:13 charles Exp $";#include "yportenv.h"#include "yaffs_mtdif2.h"#include "linux/mtd/mtd.h"#include "linux/types.h"#include "linux/time.h"#include "yaffs_packedtags2.h"/* NB For use with inband tags.... * We assume that the data buffer is of size totalBytersPerChunk so that we can also * use it to load the tags. */int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,				      const __u8 * data,				      const yaffs_ExtendedTags * tags){	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);#if (MTD_VERSION_CODE > MTD_VERSION(2,6,17))	struct mtd_oob_ops ops;#else	size_t dummy;#endif	int retval = 0;	loff_t addr;	yaffs_PackedTags2 pt;	T(YAFFS_TRACE_MTD,	  (TSTR	   ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"	    TENDSTR), chunkInNAND, data, tags));	    	addr  = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;		/* For yaffs2 writing there must be both data and tags.	 * If we're using inband tags, then the tags are stuffed into	 * the end of the data buffer.	 */	if(!data || !tags)		BUG();		else if(dev->inbandTags){		yaffs_PackedTags2TagsPart *pt2tp;		pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);		yaffs_PackTags2TagsPart(pt2tp,tags);	}	else		yaffs_PackTags2(&pt, tags);	#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))	ops.mode = MTD_OOB_AUTO;	ops.ooblen = (dev->inbandTags) ? 0 : sizeof(pt);	ops.len = dev->totalBytesPerChunk;	ops.ooboffs = 0;	ops.datbuf = (__u8 *)data;	ops.oobbuf = (dev->inbandTags) ? NULL : (void *)&pt;	retval = mtd->write_oob(mtd, addr, &ops);#else	if (!dev->inbandTags) {		retval =		    mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,				   &dummy, data, (__u8 *) & pt, NULL);	} else {		retval =		    mtd->write(mtd, addr, dev->totalBytesPerChunk, &dummy,			       data);	}#endif	if (retval == 0)		return YAFFS_OK;	else		return YAFFS_FAIL;}int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,				       __u8 * data, yaffs_ExtendedTags * tags){	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);#if (MTD_VERSION_CODE > MTD_VERSION(2,6,17))	struct mtd_oob_ops ops;#endif	size_t dummy;	int retval = 0;	int localData = 0;	loff_t addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;	yaffs_PackedTags2 pt;	T(YAFFS_TRACE_MTD,	  (TSTR	   ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"	    TENDSTR), chunkInNAND, data, tags));	    	if(dev->inbandTags){				if(!data) {			localData = 1;			data = yaffs_GetTempBuffer(dev,__LINE__);		}			}#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))	if (dev->inbandTags || (data && !tags))		retval = mtd->read(mtd, addr, dev->totalBytesPerChunk,				&dummy, data);	else if (tags) {		ops.mode = MTD_OOB_AUTO;		ops.ooblen = sizeof(pt);		ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);		ops.ooboffs = 0;		ops.datbuf = data;		ops.oobbuf = dev->spareBuffer;		retval = mtd->read_oob(mtd, addr, &ops);	}#else	if (!dev->inbandTags && data && tags) {		retval = mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,					  &dummy, data, dev->spareBuffer,					  NULL);	} else {		if (data)			retval =			    mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,				      data);		if (!dev->inbandTags && tags)			retval =			    mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,					  dev->spareBuffer);	}#endif	if(dev->inbandTags){		if(tags){			yaffs_PackedTags2TagsPart * pt2tp;			pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];				yaffs_UnpackTags2TagsPart(tags,pt2tp);		}	}	else {		if (tags){			memcpy(&pt, dev->spareBuffer, sizeof(pt));			yaffs_UnpackTags2(tags, &pt);		}	}	if(localData)		yaffs_ReleaseTempBuffer(dev,data,__LINE__);		if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)		tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;			if (retval == 0)		return YAFFS_OK;	else		return YAFFS_FAIL;}int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo){	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);	int retval;	T(YAFFS_TRACE_MTD,	  (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));	retval =	    mtd->block_markbad(mtd,			       blockNo * dev->nChunksPerBlock *			       dev->totalBytesPerChunk);	if (retval == 0)		return YAFFS_OK;	else		return YAFFS_FAIL;}int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,			    yaffs_BlockState * state, __u32 *sequenceNumber){	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);	int retval;	T(YAFFS_TRACE_MTD,	  (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));	retval =	    mtd->block_isbad(mtd,			     blockNo * dev->nChunksPerBlock *			     dev->totalBytesPerChunk);	if (retval) {		T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));		*state = YAFFS_BLOCK_STATE_DEAD;		*sequenceNumber = 0;	} else {		yaffs_ExtendedTags t;		nandmtd2_ReadChunkWithTagsFromNAND(dev,						   blockNo *						   dev->nChunksPerBlock, NULL,						   &t);		if (t.chunkUsed) {			*sequenceNumber = t.sequenceNumber;			*state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;		} else {			*sequenceNumber = 0;			*state = YAFFS_BLOCK_STATE_EMPTY;		}	}	T(YAFFS_TRACE_MTD,	  (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,	   *state));	if (retval == 0)		return YAFFS_OK;	else		return YAFFS_FAIL;}