From 28318776a80bc3261f9af91ef79e6e38bb9f5bec Mon Sep 17 00:00:00 2001
From: Joern Engel <joern@wh.fh-wedel.de>
Date: Mon, 22 May 2006 23:18:05 +0200
Subject: [PATCH] [MTD] Introduce writesize

At least two flashes exists that have the concept of a minimum write unit,
similar to NAND pages, but no other NAND characteristics.  Therefore, rename
the minimum write unit to "writesize" for all flashes, including NAND.

Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>
---
 drivers/mtd/chips/cfi_cmdset_0001.c |  4 +-
 drivers/mtd/devices/doc2000.c       |  2 +-
 drivers/mtd/devices/doc2001.c       |  2 +-
 drivers/mtd/devices/doc2001plus.c   |  2 +-
 drivers/mtd/mtdconcat.c             | 10 ++--
 drivers/mtd/mtdpart.c               |  2 +-
 drivers/mtd/nand/au1550nd.c         |  4 +-
 drivers/mtd/nand/diskonchip.c       | 16 +++----
 drivers/mtd/nand/nand_base.c        | 64 ++++++++++++-------------
 drivers/mtd/nand/nand_bbt.c         | 30 ++++++------
 drivers/mtd/nand/nandsim.c          |  2 +-
 drivers/mtd/nand/rtc_from4.c        |  2 +-
 drivers/mtd/onenand/onenand_base.c  | 72 ++++++++++++++---------------
 drivers/mtd/onenand/onenand_bbt.c   |  4 +-
 fs/jffs2/wbuf.c                     |  6 +--
 include/linux/mtd/mtd.h             |  7 ++-
 include/mtd/mtd-abi.h               |  2 +-
 17 files changed, 117 insertions(+), 114 deletions(-)

diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index d0d5e521b564..35c3689bc5c1 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -545,12 +545,12 @@ static int cfi_intelext_partition_fixup(struct mtd_info *mtd,
 		if (extp->MinorVersion >= '4') {
 			struct cfi_intelext_programming_regioninfo *prinfo;
 			prinfo = (struct cfi_intelext_programming_regioninfo *)&extp->extra[offs];
-			MTD_PROGREGION_SIZE(mtd) = cfi->interleave << prinfo->ProgRegShift;
+			mtd->writesize = cfi->interleave << prinfo->ProgRegShift;
 			MTD_PROGREGION_CTRLMODE_VALID(mtd) = cfi->interleave * prinfo->ControlValid;
 			MTD_PROGREGION_CTRLMODE_INVALID(mtd) = cfi->interleave * prinfo->ControlInvalid;
 			mtd->flags |= MTD_PROGRAM_REGIONS;
 			printk(KERN_DEBUG "%s: program region size/ctrl_valid/ctrl_inval = %d/%d/%d\n",
-			       map->name, MTD_PROGREGION_SIZE(mtd),
+			       map->name, mtd->writesize,
 			       MTD_PROGREGION_CTRLMODE_VALID(mtd),
 			       MTD_PROGREGION_CTRLMODE_INVALID(mtd));
 		}
diff --git a/drivers/mtd/devices/doc2000.c b/drivers/mtd/devices/doc2000.c
index 40cc20f6d164..423a34f4638c 100644
--- a/drivers/mtd/devices/doc2000.c
+++ b/drivers/mtd/devices/doc2000.c
@@ -579,7 +579,7 @@ void DoC2k_init(struct mtd_info *mtd)
 	mtd->ecctype = MTD_ECC_RS_DiskOnChip;
 	mtd->size = 0;
 	mtd->erasesize = 0;
-	mtd->oobblock = 512;
+	mtd->writesize = 512;
 	mtd->oobsize = 16;
 	mtd->owner = THIS_MODULE;
 	mtd->erase = doc_erase;
diff --git a/drivers/mtd/devices/doc2001.c b/drivers/mtd/devices/doc2001.c
index 1670eb8b9755..e6eaef28a2b0 100644
--- a/drivers/mtd/devices/doc2001.c
+++ b/drivers/mtd/devices/doc2001.c
@@ -361,7 +361,7 @@ void DoCMil_init(struct mtd_info *mtd)
 	/* FIXME: erase size is not always 8KiB */
 	mtd->erasesize = 0x2000;
 
-	mtd->oobblock = 512;
+	mtd->writesize = 512;
 	mtd->oobsize = 16;
 	mtd->owner = THIS_MODULE;
 	mtd->erase = doc_erase;
diff --git a/drivers/mtd/devices/doc2001plus.c b/drivers/mtd/devices/doc2001plus.c
index 0dc5d108f7b5..8422c5e92d27 100644
--- a/drivers/mtd/devices/doc2001plus.c
+++ b/drivers/mtd/devices/doc2001plus.c
@@ -483,7 +483,7 @@ void DoCMilPlus_init(struct mtd_info *mtd)
 	mtd->size = 0;
 
 	mtd->erasesize = 0;
-	mtd->oobblock = 512;
+	mtd->writesize = 512;
 	mtd->oobsize = 16;
 	mtd->owner = THIS_MODULE;
 	mtd->erase = doc_erase;
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index 3c61a980c56c..a5e8373349a5 100644
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -278,9 +278,9 @@ concat_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
 		return -EINVAL;
 
 	/* Check alignment */
-	if (mtd->oobblock > 1) {
+	if (mtd->writesize > 1) {
 		loff_t __to = to;
-		if (do_div(__to, mtd->oobblock) || (total_len % mtd->oobblock))
+		if (do_div(__to, mtd->writesize) || (total_len % mtd->writesize))
 			return -EINVAL;
 	}
 
@@ -334,7 +334,7 @@ concat_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
 		*retlen += retsize;
 		total_len -= wsize;
 		if (concat->mtd.type == MTD_NANDFLASH && eccbuf)
-			eccbuf += mtd->oobavail * (wsize / mtd->oobblock);
+			eccbuf += mtd->oobavail * (wsize / mtd->writesize);
 
 		if (total_len == 0)
 			break;
@@ -833,7 +833,7 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[],	/* subdevices to c
 	concat->mtd.flags = subdev[0]->flags;
 	concat->mtd.size = subdev[0]->size;
 	concat->mtd.erasesize = subdev[0]->erasesize;
-	concat->mtd.oobblock = subdev[0]->oobblock;
+	concat->mtd.writesize = subdev[0]->writesize;
 	concat->mtd.oobsize = subdev[0]->oobsize;
 	concat->mtd.ecctype = subdev[0]->ecctype;
 	concat->mtd.eccsize = subdev[0]->eccsize;
@@ -881,7 +881,7 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[],	/* subdevices to c
 				    subdev[i]->flags & MTD_WRITEABLE;
 		}
 		concat->mtd.size += subdev[i]->size;
-		if (concat->mtd.oobblock   !=  subdev[i]->oobblock ||
+		if (concat->mtd.writesize   !=  subdev[i]->writesize ||
 		    concat->mtd.oobsize    !=  subdev[i]->oobsize ||
 		    concat->mtd.ecctype    !=  subdev[i]->ecctype ||
 		    concat->mtd.eccsize    !=  subdev[i]->eccsize ||
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 29ed5abe70c4..082662f90481 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -398,7 +398,7 @@ int add_mtd_partitions(struct mtd_info *master,
 		slave->mtd.type = master->type;
 		slave->mtd.flags = master->flags & ~parts[i].mask_flags;
 		slave->mtd.size = parts[i].size;
-		slave->mtd.oobblock = master->oobblock;
+		slave->mtd.writesize = master->writesize;
 		slave->mtd.oobsize = master->oobsize;
 		slave->mtd.oobavail = master->oobavail;
 		slave->mtd.ecctype = master->ecctype;
diff --git a/drivers/mtd/nand/au1550nd.c b/drivers/mtd/nand/au1550nd.c
index d9a0143e1d3a..4253b9309789 100644
--- a/drivers/mtd/nand/au1550nd.c
+++ b/drivers/mtd/nand/au1550nd.c
@@ -356,9 +356,9 @@ static void au1550_command(struct mtd_info *mtd, unsigned command, int column, i
 	if (command == NAND_CMD_SEQIN) {
 		int readcmd;
 
-		if (column >= mtd->oobblock) {
+		if (column >= mtd->writesize) {
 			/* OOB area */
-			column -= mtd->oobblock;
+			column -= mtd->writesize;
 			readcmd = NAND_CMD_READOOB;
 		} else if (column < 256) {
 			/* First 256 bytes --> READ0 */
diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c
index a2391c66a63f..d160930276d6 100644
--- a/drivers/mtd/nand/diskonchip.c
+++ b/drivers/mtd/nand/diskonchip.c
@@ -761,9 +761,9 @@ static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int colu
 	if (command == NAND_CMD_SEQIN) {
 		int readcmd;
 
-		if (column >= mtd->oobblock) {
+		if (column >= mtd->writesize) {
 			/* OOB area */
-			column -= mtd->oobblock;
+			column -= mtd->writesize;
 			readcmd = NAND_CMD_READOOB;
 		} else if (column < 256) {
 			/* First 256 bytes --> READ0 */
@@ -1093,8 +1093,8 @@ static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const ch
 	size_t retlen;
 
 	for (offs = 0; offs < mtd->size; offs += mtd->erasesize) {
-		ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf);
-		if (retlen != mtd->oobblock)
+		ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf);
+		if (retlen != mtd->writesize)
 			continue;
 		if (ret) {
 			printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", offs);
@@ -1118,8 +1118,8 @@ static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const ch
 	/* Only one mediaheader was found.  We want buf to contain a
 	   mediaheader on return, so we'll have to re-read the one we found. */
 	offs = doc->mh0_page << this->page_shift;
-	ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf);
-	if (retlen != mtd->oobblock) {
+	ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf);
+	if (retlen != mtd->writesize) {
 		/* Insanity.  Give up. */
 		printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n");
 		return 0;
@@ -1139,7 +1139,7 @@ static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partitio
 	unsigned blocks, maxblocks;
 	int offs, numheaders;
 
-	buf = kmalloc(mtd->oobblock, GFP_KERNEL);
+	buf = kmalloc(mtd->writesize, GFP_KERNEL);
 	if (!buf) {
 		printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n");
 		return 0;
@@ -1247,7 +1247,7 @@ static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partiti
 	if (inftl_bbt_write)
 		end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift);
 
-	buf = kmalloc(mtd->oobblock, GFP_KERNEL);
+	buf = kmalloc(mtd->writesize, GFP_KERNEL);
 	if (!buf) {
 		printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n");
 		return 0;
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 08dffb7a9389..055f6608a2ec 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -560,9 +560,9 @@ static void nand_command(struct mtd_info *mtd, unsigned command, int column, int
 	if (command == NAND_CMD_SEQIN) {
 		int readcmd;
 
-		if (column >= mtd->oobblock) {
+		if (column >= mtd->writesize) {
 			/* OOB area */
-			column -= mtd->oobblock;
+			column -= mtd->writesize;
 			readcmd = NAND_CMD_READOOB;
 		} else if (column < 256) {
 			/* First 256 bytes --> READ0 */
@@ -658,7 +658,7 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned command, int column,
 
 	/* Emulate NAND_CMD_READOOB */
 	if (command == NAND_CMD_READOOB) {
-		column += mtd->oobblock;
+		column += mtd->writesize;
 		command = NAND_CMD_READ0;
 	}
 
@@ -889,7 +889,7 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int pag
 		/* No ecc, write all */
 	case NAND_ECC_NONE:
 		printk(KERN_WARNING "Writing data without ECC to NAND-FLASH is not recommended\n");
-		this->write_buf(mtd, this->data_poi, mtd->oobblock);
+		this->write_buf(mtd, this->data_poi, mtd->writesize);
 		break;
 
 		/* Software ecc 3/256, write all */
@@ -900,7 +900,7 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int pag
 				oob_buf[oob_config[eccidx]] = ecc_code[i];
 			datidx += this->eccsize;
 		}
-		this->write_buf(mtd, this->data_poi, mtd->oobblock);
+		this->write_buf(mtd, this->data_poi, mtd->writesize);
 		break;
 	default:
 		eccbytes = this->eccbytes;
@@ -1161,9 +1161,9 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
 	page = realpage & this->pagemask;
 
 	/* Get raw starting column */
-	col = from & (mtd->oobblock - 1);
+	col = from & (mtd->writesize - 1);
 
-	end = mtd->oobblock;
+	end = mtd->writesize;
 	ecc = this->eccsize;
 	eccbytes = this->eccbytes;
 
@@ -1321,7 +1321,7 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
 				buf[read++] = data_poi[j];
 			this->pagebuf = realpage;
 		} else
-			read += mtd->oobblock;
+			read += mtd->writesize;
 
 		/* Apply delay or wait for ready/busy pin
 		 * Do this before the AUTOINCR check, so no problems
@@ -1479,7 +1479,7 @@ int nand_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, s
 	int chip = (int)(from >> this->chip_shift);
 	int sndcmd = 1;
 	int cnt = 0;
-	int pagesize = mtd->oobblock + mtd->oobsize;
+	int pagesize = mtd->writesize + mtd->oobsize;
 	int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1;
 
 	/* Do not allow reads past end of device */
@@ -1581,7 +1581,7 @@ static u_char *nand_prepare_oobbuf(struct mtd_info *mtd, u_char *fsbuf, struct n
 	return this->oob_buf;
 }
 
-#define NOTALIGNED(x) (x & (mtd->oobblock-1)) != 0
+#define NOTALIGNED(x) (x & (mtd->writesize-1)) != 0
 
 /**
  * nand_write - [MTD Interface] compability function for nand_write_ecc
@@ -1694,7 +1694,7 @@ static int nand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
 		/* Next oob page */
 		oob += mtd->oobsize;
 		/* Update written bytes count */
-		written += mtd->oobblock;
+		written += mtd->writesize;
 		if (written == len)
 			goto cmp;
 
@@ -1805,7 +1805,7 @@ static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *r
 
 	if (NAND_MUST_PAD(this)) {
 		/* Write out desired data */
-		this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->oobblock, page & this->pagemask);
+		this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page & this->pagemask);
 		/* prepad 0xff for partial programming */
 		this->write_buf(mtd, ffchars, column);
 		/* write data */
@@ -1814,7 +1814,7 @@ static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *r
 		this->write_buf(mtd, ffchars, mtd->oobsize - (len + column));
 	} else {
 		/* Write out desired data */
-		this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->oobblock + column, page & this->pagemask);
+		this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize + column, page & this->pagemask);
 		/* write data */
 		this->write_buf(mtd, buf, len);
 	}
@@ -1947,7 +1947,7 @@ static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsign
 		/* If the given tuple is >= pagesize then
 		 * write it out from the iov
 		 */
-		if ((vecs->iov_len - len) >= mtd->oobblock) {
+		if ((vecs->iov_len - len) >= mtd->writesize) {
 			/* Calc number of pages we can write
 			 * out of this iov in one go */
 			numpages = (vecs->iov_len - len) >> this->page_shift;
@@ -1967,8 +1967,8 @@ static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsign
 						      &oobbuf[oob], oobsel, i != numpages);
 				if (ret)
 					goto out;
-				this->data_poi += mtd->oobblock;
-				len += mtd->oobblock;
+				this->data_poi += mtd->writesize;
+				len += mtd->writesize;
 				oob += mtd->oobsize;
 				page++;
 			}
@@ -1983,7 +1983,7 @@ static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsign
 			 * tuple until we have a full page to write
 			 */
 			int cnt = 0;
-			while (cnt < mtd->oobblock) {
+			while (cnt < mtd->writesize) {
 				if (vecs->iov_base != NULL && vecs->iov_len)
 					this->data_buf[cnt++] = ((u_char *) vecs->iov_base)[len++];
 				/* Check, if we have to switch to the next tuple */
@@ -2009,7 +2009,7 @@ static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsign
 		if (ret)
 			goto out;
 
-		written += mtd->oobblock * numpages;
+		written += mtd->writesize * numpages;
 		/* All done ? */
 		if (!count)
 			break;
@@ -2411,10 +2411,10 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
 			/* The 4th id byte is the important one */
 			extid = this->read_byte(mtd);
 			/* Calc pagesize */
-			mtd->oobblock = 1024 << (extid & 0x3);
+			mtd->writesize = 1024 << (extid & 0x3);
 			extid >>= 2;
 			/* Calc oobsize */
-			mtd->oobsize = (8 << (extid & 0x01)) * (mtd->oobblock >> 9);
+			mtd->oobsize = (8 << (extid & 0x01)) * (mtd->writesize >> 9);
 			extid >>= 2;
 			/* Calc blocksize. Blocksize is multiples of 64KiB */
 			mtd->erasesize = (64 * 1024) << (extid & 0x03);
@@ -2426,8 +2426,8 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
 			/* Old devices have this data hardcoded in the
 			 * device id table */
 			mtd->erasesize = nand_flash_ids[i].erasesize;
-			mtd->oobblock = nand_flash_ids[i].pagesize;
-			mtd->oobsize = mtd->oobblock / 32;
+			mtd->writesize = nand_flash_ids[i].pagesize;
+			mtd->oobsize = mtd->writesize / 32;
 			busw = nand_flash_ids[i].options & NAND_BUSWIDTH_16;
 		}
 
@@ -2451,12 +2451,12 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
 		}
 
 		/* Calculate the address shift from the page size */
-		this->page_shift = ffs(mtd->oobblock) - 1;
+		this->page_shift = ffs(mtd->writesize) - 1;
 		this->bbt_erase_shift = this->phys_erase_shift = ffs(mtd->erasesize) - 1;
 		this->chip_shift = ffs(this->chipsize) - 1;
 
 		/* Set the bad block position */
-		this->badblockpos = mtd->oobblock > 512 ? NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS;
+		this->badblockpos = mtd->writesize > 512 ? NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS;
 
 		/* Get chip options, preserve non chip based options */
 		this->options &= ~NAND_CHIPOPTIONS_MSK;
@@ -2476,7 +2476,7 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
 			this->erase_cmd = single_erase_cmd;
 
 		/* Do not replace user supplied command function ! */
-		if (mtd->oobblock > 512 && this->cmdfunc == nand_command)
+		if (mtd->writesize > 512 && this->cmdfunc == nand_command)
 			this->cmdfunc = nand_command_lp;
 
 		printk(KERN_INFO "NAND device: Manufacturer ID:"
@@ -2519,7 +2519,7 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
 
 	if (!this->data_buf) {
 		size_t len;
-		len = mtd->oobblock + mtd->oobsize;
+		len = mtd->writesize + mtd->oobsize;
 		this->data_buf = kmalloc(len, GFP_KERNEL);
 		if (!this->data_buf) {
 			if (this->options & NAND_OOBBUF_ALLOC)
@@ -2575,9 +2575,9 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
 
 	switch (this->eccmode) {
 	case NAND_ECC_HW12_2048:
-		if (mtd->oobblock < 2048) {
+		if (mtd->writesize < 2048) {
 			printk(KERN_WARNING "2048 byte HW ECC not possible on %d byte page size, fallback to SW ECC\n",
-			       mtd->oobblock);
+			       mtd->writesize);
 			this->eccmode = NAND_ECC_SOFT;
 			this->calculate_ecc = nand_calculate_ecc;
 			this->correct_data = nand_correct_data;
@@ -2588,7 +2588,7 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
 	case NAND_ECC_HW3_512:
 	case NAND_ECC_HW6_512:
 	case NAND_ECC_HW8_512:
-		if (mtd->oobblock == 256) {
+		if (mtd->writesize == 256) {
 			printk(KERN_WARNING "512 byte HW ECC not possible on 256 Byte pagesize, fallback to SW ECC \n");
 			this->eccmode = NAND_ECC_SOFT;
 			this->calculate_ecc = nand_calculate_ecc;
@@ -2638,16 +2638,16 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
 	/* Set the number of read / write steps for one page to ensure ECC generation */
 	switch (this->eccmode) {
 	case NAND_ECC_HW12_2048:
-		this->eccsteps = mtd->oobblock / 2048;
+		this->eccsteps = mtd->writesize / 2048;
 		break;
 	case NAND_ECC_HW3_512:
 	case NAND_ECC_HW6_512:
 	case NAND_ECC_HW8_512:
-		this->eccsteps = mtd->oobblock / 512;
+		this->eccsteps = mtd->writesize / 512;
 		break;
 	case NAND_ECC_HW3_256:
 	case NAND_ECC_SOFT:
-		this->eccsteps = mtd->oobblock / 256;
+		this->eccsteps = mtd->writesize / 256;
 		break;
 
 	case NAND_ECC_NONE:
diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
index 9adc6d62332a..fbccb2a25186 100644
--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -247,15 +247,15 @@ static int read_abs_bbts(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_des
 
 	/* Read the primary version, if available */
 	if (td->options & NAND_BBT_VERSION) {
-		nand_read_raw(mtd, buf, td->pages[0] << this->page_shift, mtd->oobblock, mtd->oobsize);
-		td->version[0] = buf[mtd->oobblock + td->veroffs];
+		nand_read_raw(mtd, buf, td->pages[0] << this->page_shift, mtd->writesize, mtd->oobsize);
+		td->version[0] = buf[mtd->writesize + td->veroffs];
 		printk(KERN_DEBUG "Bad block table at page %d, version 0x%02X\n", td->pages[0], td->version[0]);
 	}
 
 	/* Read the mirror version, if available */
 	if (md && (md->options & NAND_BBT_VERSION)) {
-		nand_read_raw(mtd, buf, md->pages[0] << this->page_shift, mtd->oobblock, mtd->oobsize);
-		md->version[0] = buf[mtd->oobblock + md->veroffs];
+		nand_read_raw(mtd, buf, md->pages[0] << this->page_shift, mtd->writesize, mtd->oobsize);
+		md->version[0] = buf[mtd->writesize + md->veroffs];
 		printk(KERN_DEBUG "Bad block table at page %d, version 0x%02X\n", md->pages[0], md->version[0]);
 	}
 
@@ -298,8 +298,8 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
 		readlen = bd->len;
 	} else {
 		/* Full page content should be read */
-		scanlen = mtd->oobblock + mtd->oobsize;
-		readlen = len * mtd->oobblock;
+		scanlen = mtd->writesize + mtd->oobsize;
+		readlen = len * mtd->writesize;
 		ooblen = len * mtd->oobsize;
 	}
 
@@ -334,7 +334,7 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
 
 				/* Read the full oob until read_oob is fixed to
 				 * handle single byte reads for 16 bit buswidth */
-				ret = mtd->read_oob(mtd, from + j * mtd->oobblock, mtd->oobsize, &retlen, buf);
+				ret = mtd->read_oob(mtd, from + j * mtd->writesize, mtd->oobsize, &retlen, buf);
 				if (ret)
 					return ret;
 
@@ -345,7 +345,7 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
 					break;
 				}
 			} else {
-				if (check_pattern(&buf[j * scanlen], scanlen, mtd->oobblock, bd)) {
+				if (check_pattern(&buf[j * scanlen], scanlen, mtd->writesize, bd)) {
 					this->bbt[i >> 3] |= 0x03 << (i & 0x6);
 					printk(KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
 					       i >> 1, (unsigned int)from);
@@ -381,7 +381,7 @@ static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
 	struct nand_chip *this = mtd->priv;
 	int i, chips;
 	int bits, startblock, block, dir;
-	int scanlen = mtd->oobblock + mtd->oobsize;
+	int scanlen = mtd->writesize + mtd->oobsize;
 	int bbtblocks;
 
 	/* Search direction top -> down ? */
@@ -414,11 +414,11 @@ static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
 		for (block = 0; block < td->maxblocks; block++) {
 			int actblock = startblock + dir * block;
 			/* Read first page */
-			nand_read_raw(mtd, buf, actblock << this->bbt_erase_shift, mtd->oobblock, mtd->oobsize);
-			if (!check_pattern(buf, scanlen, mtd->oobblock, td)) {
+			nand_read_raw(mtd, buf, actblock << this->bbt_erase_shift, mtd->writesize, mtd->oobsize);
+			if (!check_pattern(buf, scanlen, mtd->writesize, td)) {
 				td->pages[i] = actblock << (this->bbt_erase_shift - this->page_shift);
 				if (td->options & NAND_BBT_VERSION) {
-					td->version[i] = buf[mtd->oobblock + td->veroffs];
+					td->version[i] = buf[mtd->writesize + td->veroffs];
 				}
 				break;
 			}
@@ -586,7 +586,7 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
 			/* Calc length */
 			len = (size_t) (numblocks >> sft);
 			/* Make it page aligned ! */
-			len = (len + (mtd->oobblock - 1)) & ~(mtd->oobblock - 1);
+			len = (len + (mtd->writesize - 1)) & ~(mtd->writesize - 1);
 			/* Preset the buffer with 0xff */
 			memset(buf, 0xff, len + (len >> this->page_shift) * mtd->oobsize);
 			offs = 0;
@@ -1063,13 +1063,13 @@ int nand_default_bbt(struct mtd_info *mtd)
 			this->bbt_md = &bbt_mirror_descr;
 		}
 		if (!this->badblock_pattern) {
-			this->badblock_pattern = (mtd->oobblock > 512) ? &largepage_flashbased : &smallpage_flashbased;
+			this->badblock_pattern = (mtd->writesize > 512) ? &largepage_flashbased : &smallpage_flashbased;
 		}
 	} else {
 		this->bbt_td = NULL;
 		this->bbt_md = NULL;
 		if (!this->badblock_pattern) {
-			this->badblock_pattern = (mtd->oobblock > 512) ?
+			this->badblock_pattern = (mtd->writesize > 512) ?
 			    &largepage_memorybased : &smallpage_memorybased;
 		}
 	}
diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index 6903f5b903c6..8674f1e9d3c6 100644
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -369,7 +369,7 @@ init_nandsim(struct mtd_info *mtd)
 	/* Initialize the NAND flash parameters */
 	ns->busw = chip->options & NAND_BUSWIDTH_16 ? 16 : 8;
 	ns->geom.totsz    = mtd->size;
-	ns->geom.pgsz     = mtd->oobblock;
+	ns->geom.pgsz     = mtd->writesize;
 	ns->geom.oobsz    = mtd->oobsize;
 	ns->geom.secsz    = mtd->erasesize;
 	ns->geom.pgszoob  = ns->geom.pgsz + ns->geom.oobsz;
diff --git a/drivers/mtd/nand/rtc_from4.c b/drivers/mtd/nand/rtc_from4.c
index bc9d849fbd5d..64ccf4c9613f 100644
--- a/drivers/mtd/nand/rtc_from4.c
+++ b/drivers/mtd/nand/rtc_from4.c
@@ -487,7 +487,7 @@ static int rtc_from4_errstat(struct mtd_info *mtd, struct nand_chip *this, int s
 		if (!(rtn & ERR_STAT_ECC_AVAILABLE)) {
 			er_stat |= 1 << 1;	/* err_ecc_not_avail */
 		} else {
-			len = mtd->oobblock;
+			len = mtd->writesize;
 			buf = kmalloc(len, GFP_KERNEL);
 			if (!buf) {
 				printk(KERN_ERR "rtc_from4_errstat: Out of memory!\n");
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index fe5b48997275..198bb8562d93 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -354,7 +354,7 @@ static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area)
 
 	if (ONENAND_CURRENT_BUFFERRAM(this)) {
 		if (area == ONENAND_DATARAM)
-			return mtd->oobblock;
+			return mtd->writesize;
 		if (area == ONENAND_SPARERAM)
 			return mtd->oobsize;
 	}
@@ -632,14 +632,14 @@ static int onenand_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
 	/* TODO handling oob */
 
 	while (read < len) {
-		thislen = min_t(int, mtd->oobblock, len - read);
+		thislen = min_t(int, mtd->writesize, len - read);
 
-		column = from & (mtd->oobblock - 1);
-		if (column + thislen > mtd->oobblock)
-			thislen = mtd->oobblock - column;
+		column = from & (mtd->writesize - 1);
+		if (column + thislen > mtd->writesize)
+			thislen = mtd->writesize - column;
 
 		if (!onenand_check_bufferram(mtd, from)) {
-			this->command(mtd, ONENAND_CMD_READ, from, mtd->oobblock);
+			this->command(mtd, ONENAND_CMD_READ, from, mtd->writesize);
 
 			ret = this->wait(mtd, FL_READING);
 			/* First copy data and check return value for ECC handling */
@@ -752,7 +752,7 @@ static int onenand_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
 		/* Read more? */
 		if (read < len) {
 			/* Page size */
-			from += mtd->oobblock;
+			from += mtd->writesize;
 			column = 0;
 		}
 	}
@@ -809,7 +809,7 @@ static int onenand_verify_page(struct mtd_info *mtd, u_char *buf, loff_t addr)
 	void __iomem *dataram0, *dataram1;
 	int ret = 0;
 
-	this->command(mtd, ONENAND_CMD_READ, addr, mtd->oobblock);
+	this->command(mtd, ONENAND_CMD_READ, addr, mtd->writesize);
 
 	ret = this->wait(mtd, FL_READING);
 	if (ret)
@@ -819,9 +819,9 @@ static int onenand_verify_page(struct mtd_info *mtd, u_char *buf, loff_t addr)
 
 	/* Check, if the two dataram areas are same */
 	dataram0 = this->base + ONENAND_DATARAM;
-	dataram1 = dataram0 + mtd->oobblock;
+	dataram1 = dataram0 + mtd->writesize;
 
-	if (memcmp(dataram0, dataram1, mtd->oobblock))
+	if (memcmp(dataram0, dataram1, mtd->writesize))
 		return -EBADMSG;
 
 	return 0;
@@ -831,7 +831,7 @@ static int onenand_verify_page(struct mtd_info *mtd, u_char *buf, loff_t addr)
 #define onenand_verify_oob(...)		(0)
 #endif
 
-#define NOTALIGNED(x)	((x & (mtd->oobblock - 1)) != 0)
+#define NOTALIGNED(x)	((x & (mtd->writesize - 1)) != 0)
 
 /**
  * onenand_write_ecc - [MTD Interface] OneNAND write with ECC
@@ -875,14 +875,14 @@ static int onenand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
 
 	/* Loop until all data write */
 	while (written < len) {
-		int thislen = min_t(int, mtd->oobblock, len - written);
+		int thislen = min_t(int, mtd->writesize, len - written);
 
-		this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobblock);
+		this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->writesize);
 
 		this->write_bufferram(mtd, ONENAND_DATARAM, buf, 0, thislen);
 		this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize);
 
-		this->command(mtd, ONENAND_CMD_PROG, to, mtd->oobblock);
+		this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
 
 		onenand_update_bufferram(mtd, to, 1);
 
@@ -1070,10 +1070,10 @@ static int onenand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
 		 * If the given tuple is >= pagesize then
 		 * write it out from the iov
 		 */
-		if ((vecs->iov_len - len) >= mtd->oobblock) {
+		if ((vecs->iov_len - len) >= mtd->writesize) {
 			pbuf = vecs->iov_base + len;
 
-			len += mtd->oobblock;
+			len += mtd->writesize;
 
 			/* Check, if we have to switch to the next tuple */
 			if (len >= (int) vecs->iov_len) {
@@ -1083,8 +1083,8 @@ static int onenand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
 			}
 		} else {
 			int cnt = 0, thislen;
-			while (cnt < mtd->oobblock) {
-				thislen = min_t(int, mtd->oobblock - cnt, vecs->iov_len - len);
+			while (cnt < mtd->writesize) {
+				thislen = min_t(int, mtd->writesize - cnt, vecs->iov_len - len);
 				memcpy(this->page_buf + cnt, vecs->iov_base + len, thislen);
 				cnt += thislen;
 				len += thislen;
@@ -1098,12 +1098,12 @@ static int onenand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
 			}
 		}
 
-		this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobblock);
+		this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->writesize);
 
-		this->write_bufferram(mtd, ONENAND_DATARAM, pbuf, 0, mtd->oobblock);
+		this->write_bufferram(mtd, ONENAND_DATARAM, pbuf, 0, mtd->writesize);
 		this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize);
 
-		this->command(mtd, ONENAND_CMD_PROG, to, mtd->oobblock);
+		this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
 
 		onenand_update_bufferram(mtd, to, 1);
 
@@ -1121,9 +1121,9 @@ static int onenand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
 			goto out;
 		}
 
-		written += mtd->oobblock;
+		written += mtd->writesize;
 
-		to += mtd->oobblock;
+		to += mtd->writesize;
 	}
 
 out:
@@ -1467,11 +1467,11 @@ static int do_otp_write(struct mtd_info *mtd, loff_t from, size_t len,
 	int ret;
 
 	/* Force buffer page aligned */
-	if (len < mtd->oobblock) {
+	if (len < mtd->writesize) {
 		memcpy(this->page_buf, buf, len);
-		memset(this->page_buf + len, 0xff, mtd->oobblock - len);
+		memset(this->page_buf + len, 0xff, mtd->writesize - len);
 		pbuf = this->page_buf;
-		len = mtd->oobblock;
+		len = mtd->writesize;
 	}
 
 	/* Enter OTP access mode */
@@ -1546,12 +1546,12 @@ static int onenand_otp_walk(struct mtd_info *mtd, loff_t from, size_t len,
 		otp_pages = 10;
 
 	if (mode == MTD_OTP_FACTORY) {
-		from += mtd->oobblock * otp_pages;
+		from += mtd->writesize * otp_pages;
 		otp_pages = 64 - otp_pages;
 	}
 
 	/* Check User/Factory boundary */
-	if (((mtd->oobblock * otp_pages) - (from + len)) < 0)
+	if (((mtd->writesize * otp_pages) - (from + len)) < 0)
 		return 0;
 
 	while (len > 0 && otp_pages > 0) {
@@ -1564,10 +1564,10 @@ static int onenand_otp_walk(struct mtd_info *mtd, loff_t from, size_t len,
 
 			otpinfo = (struct otp_info *) buf;
 			otpinfo->start = from;
-			otpinfo->length = mtd->oobblock;
+			otpinfo->length = mtd->writesize;
 			otpinfo->locked = 0;
 
-			from += mtd->oobblock;
+			from += mtd->writesize;
 			buf += sizeof(struct otp_info);
 			*retlen += sizeof(struct otp_info);
 		} else {
@@ -1811,15 +1811,15 @@ static int onenand_probe(struct mtd_info *mtd)
 
 	/* OneNAND page size & block size */
 	/* The data buffer size is equal to page size */
-	mtd->oobblock = this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
-	mtd->oobsize = mtd->oobblock >> 5;
+	mtd->writesize = this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
+	mtd->oobsize = mtd->writesize >> 5;
 	/* Pagers per block is always 64 in OneNAND */
-	mtd->erasesize = mtd->oobblock << 6;
+	mtd->erasesize = mtd->writesize << 6;
 
 	this->erase_shift = ffs(mtd->erasesize) - 1;
-	this->page_shift = ffs(mtd->oobblock) - 1;
+	this->page_shift = ffs(mtd->writesize) - 1;
 	this->ppb_shift = (this->erase_shift - this->page_shift);
-	this->page_mask = (mtd->erasesize / mtd->oobblock) - 1;
+	this->page_mask = (mtd->erasesize / mtd->writesize) - 1;
 
 	/* REVIST: Multichip handling */
 
@@ -1909,7 +1909,7 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
 	/* Allocate buffers, if necessary */
 	if (!this->page_buf) {
 		size_t len;
-		len = mtd->oobblock + mtd->oobsize;
+		len = mtd->writesize + mtd->oobsize;
 		this->page_buf = kmalloc(len, GFP_KERNEL);
 		if (!this->page_buf) {
 			printk(KERN_ERR "onenand_scan(): Can't allocate page_buf\n");
diff --git a/drivers/mtd/onenand/onenand_bbt.c b/drivers/mtd/onenand/onenand_bbt.c
index 4510d3361eaa..aafd7c2f7802 100644
--- a/drivers/mtd/onenand/onenand_bbt.c
+++ b/drivers/mtd/onenand/onenand_bbt.c
@@ -87,13 +87,13 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
 
 			/* No need to read pages fully,
 			 * just read required OOB bytes */
-			ret = mtd->read_oob(mtd, from + j * mtd->oobblock + bd->offs,
+			ret = mtd->read_oob(mtd, from + j * mtd->writesize + bd->offs,
 						readlen, &retlen, &buf[0]);
 
 			if (ret)
 				return ret;
 
-			if (check_short_pattern(&buf[j * scanlen], scanlen, mtd->oobblock, bd)) {
+			if (check_short_pattern(&buf[j * scanlen], scanlen, mtd->writesize, bd)) {
 				bbm->bbt[i >> 3] |= 0x03 << (i & 0x6);
 				printk(KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
 					i >> 1, (unsigned int) from);
diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c
index 62f685faeba8..355226d8ce29 100644
--- a/fs/jffs2/wbuf.c
+++ b/fs/jffs2/wbuf.c
@@ -1173,7 +1173,7 @@ int jffs2_nand_flash_setup(struct jffs2_sb_info *c)
 
 	/* Initialise write buffer */
 	init_rwsem(&c->wbuf_sem);
-	c->wbuf_pagesize = c->mtd->oobblock;
+	c->wbuf_pagesize = c->mtd->writesize;
 	c->wbuf_ofs = 0xFFFFFFFF;
 
 	c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
@@ -1266,11 +1266,11 @@ void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c) {
 
 int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c) {
 	/* Cleanmarker currently occupies a whole programming region */
-	c->cleanmarker_size = MTD_PROGREGION_SIZE(c->mtd);
+	c->cleanmarker_size = c->mtd->writesize;
 
 	/* Initialize write buffer */
 	init_rwsem(&c->wbuf_sem);
-	c->wbuf_pagesize = MTD_PROGREGION_SIZE(c->mtd);
+	c->wbuf_pagesize = c->mtd->writesize;
 	c->wbuf_ofs = 0xFFFFFFFF;
 
 	c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 73620ef83364..d48c7492392b 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -66,8 +66,12 @@ struct mtd_info {
 	 * information below if they desire
 	 */
 	u_int32_t erasesize;
+	/* Smallest availlable size for writing to the device.  For NAND,
+	 * this is the page size, for some NOR chips, the size of ECC
+	 * covered blocks.
+	 */
+	u_int32_t writesize;
 
-	u_int32_t oobblock;  // Size of OOB blocks (e.g. 512)
 	u_int32_t oobsize;   // Amount of OOB data per block (e.g. 16)
 	u_int32_t ecctype;
 	u_int32_t eccsize;
@@ -79,7 +83,6 @@ struct mtd_info {
 	 * MTD_PROGRAM_REGIONS flag is set.
 	 * (Maybe we should have an union for those?)
 	 */
-#define MTD_PROGREGION_SIZE(mtd)  (mtd)->oobblock
 #define MTD_PROGREGION_CTRLMODE_VALID(mtd)  (mtd)->oobsize
 #define MTD_PROGREGION_CTRLMODE_INVALID(mtd)  (mtd)->ecctype
 
diff --git a/include/mtd/mtd-abi.h b/include/mtd/mtd-abi.h
index e4d61f33d5bb..520a3b483100 100644
--- a/include/mtd/mtd-abi.h
+++ b/include/mtd/mtd-abi.h
@@ -63,7 +63,7 @@ struct mtd_info_user {
 	uint32_t flags;
 	uint32_t size;	 // Total size of the MTD
 	uint32_t erasesize;
-	uint32_t oobblock;  // Size of OOB blocks (e.g. 512)
+	uint32_t writesize;
 	uint32_t oobsize;   // Amount of OOB data per block (e.g. 16)
 	uint32_t ecctype;
 	uint32_t eccsize;
-- 
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