int nandmtd_ReadChunkFromNAND(struct yaffs_dev *dev, int chunkInNAND, u8 *data,
			      struct yaffs_spare *spare)
{
	struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
	struct mtd_oob_ops ops;
	size_t dummy;
	int retval = 0;

	loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk;
	u8 spareAsBytes[8]; /* OOB */

	if (data && !spare)
		retval = mtd->read(mtd, addr, dev->data_bytes_per_chunk,
				&dummy, data);
	else if (spare) {
		if (dev->param.use_nand_ecc) {
			ops.mode = MTD_OOB_AUTO;
			ops.ooblen = 8; /* temp hack */
		} else {
			ops.mode = MTD_OOB_RAW;
			ops.ooblen = YAFFS_BYTES_PER_SPARE;
		}
		ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen;
		ops.datbuf = data;
		ops.ooboffs = 0;
		ops.oobbuf = spareAsBytes;
		retval = mtd->read_oob(mtd, addr, &ops);
		if (dev->param.use_nand_ecc)
			translate_oob2spare(spare, spareAsBytes);
	}

	if (retval == 0)
		return YAFFS_OK;
	else
		return YAFFS_FAIL;
}
示例#2
0
int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data,
			      yaffs_Spare * spare)
{
	struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
	struct mtd_oob_ops ops;
#endif
	size_t dummy;
	int retval = 0;

	loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
	__u8 spareAsBytes[8]; /* OOB */

	if (data && !spare)
		retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
				&dummy, data);
	else if (spare) {
		if (dev->useNANDECC) {
			ops.mode = MTD_OOB_AUTO;
			ops.ooblen = 8; /* temp hack */
		} else {
			ops.mode = MTD_OOB_RAW;
			ops.ooblen = YAFFS_BYTES_PER_SPARE;
		}
		ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
		ops.datbuf = data;
		ops.ooboffs = 0;
		ops.oobbuf = spareAsBytes;
		retval = mtd->read_oob(mtd, addr, &ops);
		if (dev->useNANDECC)
			translate_oob2spare(spare, spareAsBytes);
	}
#else
	__u8 *spareAsBytes = (__u8 *) spare;

	if (data && spare) {
		if (dev->useNANDECC) {
			/* Careful, this call adds 2 ints */
			/* to the end of the spare data.  Calling function */
			/* should allocate enough memory for spare, */
			/* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */
			retval =
			    mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
					  &dummy, data, spareAsBytes,
					  &yaffs_oobinfo);
		} else {
			retval =
			    mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
					  &dummy, data, spareAsBytes,
					  &yaffs_noeccinfo);
		}
	} else {
		if (data)
			retval =
			    mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
				      data);
		if (spare)
			retval =
			    mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
					  &dummy, spareAsBytes);
	}
#endif

	if (retval == 0)
		return YAFFS_OK;
	else
		return YAFFS_FAIL;
}
示例#3
0
int nandmtd_ReadChunkFromNAND(yaffs_Device *dev, int chunkInNAND, __u8 *data,
			      yaffs_Spare *spare)
{
	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;

	loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
	__u8 spareAsBytes[8]; 

	if (data && !spare)
		retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
				&dummy, data);
	else if (spare) {
		if (dev->useNANDECC) {
			ops.mode = MTD_OOB_AUTO;
			ops.ooblen = 8; 
		} else {
			ops.mode = MTD_OOB_RAW;
			ops.ooblen = YAFFS_BYTES_PER_SPARE;
		}
		ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
		ops.datbuf = data;
		ops.ooboffs = 0;
		ops.oobbuf = spareAsBytes;
		retval = mtd->read_oob(mtd, addr, &ops);
		if (dev->useNANDECC)
			translate_oob2spare(spare, spareAsBytes);
	}
#else
	__u8 *spareAsBytes = (__u8 *) spare;

	if (data && spare) {
		if (dev->useNANDECC) {
			
			
			
			
			retval =
			    mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
					  &dummy, data, spareAsBytes,
					  &yaffs_oobinfo);
		} else {
			retval =
			    mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
					  &dummy, data, spareAsBytes,
					  &yaffs_noeccinfo);
		}
	} else {
		if (data)
			retval =
			    mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
				      data);
		if (spare)
			retval =
			    mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
					  &dummy, spareAsBytes);
	}
#endif

	if (retval == 0)
		return YAFFS_OK;
	else
		return YAFFS_FAIL;
}