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: [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/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 +-
 6 files changed, 59 insertions(+), 59 deletions(-)

(limited to 'drivers/mtd/nand')

diff --git a/drivers/mtd/nand/au1550nd.c b/drivers/mtd/nand/au1550nd.c
index d9a0143e1d3..4253b930978 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 a2391c66a63..d160930276d 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 08dffb7a938..055f6608a2e 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 9adc6d62332..fbccb2a2518 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 6903f5b903c..8674f1e9d3c 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 bc9d849fbd5..64ccf4c9613 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");
-- 
cgit v1.2.3-70-g09d2


From 5fa433942ba4e399f7e28764c9db4ade89e91d40 Mon Sep 17 00:00:00 2001
From: Joern Engel <joern@wh.fh-wedel.de>
Date: Mon, 22 May 2006 23:18:29 +0200
Subject: [MTD] Introduce MTD_BIT_WRITEABLE

o Add a flag MTD_BIT_WRITEABLE for devices that allow single bits to be
  cleared.
o Replace MTD_PROGRAM_REGIONS with a cleared MTD_BIT_WRITEABLE flag for
  STMicro and Intel Sibley flashes with internal ECC.  Those flashes
  disallow clearing of single bits, unlike regular NOR flashes, so the
  new flag models their behaviour better.
o Remove MTD_ECC.  After the STMicro/Sibley merge, this flag is only set
  and never checked.

Signed-off-by: Joern Engel <joern@wh.fh-wedel.de>
---
 drivers/mtd/chips/cfi_cmdset_0001.c | 2 +-
 drivers/mtd/chips/cfi_cmdset_0020.c | 3 +--
 drivers/mtd/nand/nand_base.c        | 2 +-
 drivers/mtd/onenand/onenand_base.c  | 2 +-
 fs/jffs2/os-linux.h                 | 6 ++----
 include/mtd/mtd-abi.h               | 7 +++----
 6 files changed, 9 insertions(+), 13 deletions(-)

(limited to 'drivers/mtd/nand')

diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 35c3689bc5c..0d435814aaa 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -548,7 +548,7 @@ static int cfi_intelext_partition_fixup(struct mtd_info *mtd,
 			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;
+			mtd->flags &= ~MTD_BIT_WRITEABLE;
 			printk(KERN_DEBUG "%s: program region size/ctrl_valid/ctrl_inval = %d/%d/%d\n",
 			       map->name, mtd->writesize,
 			       MTD_PROGREGION_CTRLMODE_VALID(mtd),
diff --git a/drivers/mtd/chips/cfi_cmdset_0020.c b/drivers/mtd/chips/cfi_cmdset_0020.c
index d745285fccf..fae70a5db54 100644
--- a/drivers/mtd/chips/cfi_cmdset_0020.c
+++ b/drivers/mtd/chips/cfi_cmdset_0020.c
@@ -238,8 +238,7 @@ static struct mtd_info *cfi_staa_setup(struct map_info *map)
 	mtd->unlock = cfi_staa_unlock;
 	mtd->suspend = cfi_staa_suspend;
 	mtd->resume = cfi_staa_resume;
-	mtd->flags = MTD_CAP_NORFLASH;
-	mtd->flags |= MTD_PROGRAM_REGIONS; /* FIXME: Not all STMicro flashes have this */
+	mtd->flags = MTD_CAP_NORFLASH & ~MTD_BIT_WRITEABLE;
 	mtd->writesize = 8; /* FIXME: Should be 0 for STMicro flashes w/out ECC */
 	map->fldrv = &cfi_staa_chipdrv;
 	__module_get(THIS_MODULE);
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 055f6608a2e..cd90a46bf56 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2668,7 +2668,7 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
 
 	/* Fill in remaining MTD driver data */
 	mtd->type = MTD_NANDFLASH;
-	mtd->flags = MTD_CAP_NANDFLASH | MTD_ECC;
+	mtd->flags = MTD_CAP_NANDFLASH;
 	mtd->ecctype = MTD_ECC_SW;
 	mtd->erase = nand_erase;
 	mtd->point = NULL;
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 198bb8562d9..4c2c61d54b3 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -1943,7 +1943,7 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
 
 	/* Fill in remaining MTD driver data */
 	mtd->type = MTD_NANDFLASH;
-	mtd->flags = MTD_CAP_NANDFLASH | MTD_ECC;
+	mtd->flags = MTD_CAP_NANDFLASH;
 	mtd->ecctype = MTD_ECC_SW;
 	mtd->erase = onenand_erase;
 	mtd->point = NULL;
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
index 1a6eb955e0b..743c9e52152 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -105,9 +105,7 @@ static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
 #ifdef CONFIG_JFFS2_SUMMARY
 #define jffs2_can_mark_obsolete(c) (0)
 #else
-#define jffs2_can_mark_obsolete(c) \
-  ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & (MTD_PROGRAM_REGIONS))) || \
-   c->mtd->type == MTD_RAM)
+#define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE))
 #endif
 
 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
@@ -135,7 +133,7 @@ void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
 int jffs2_dataflash_setup(struct jffs2_sb_info *c);
 void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
 
-#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_PROGRAM_REGIONS))
+#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE))
 int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
 void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c);
 
diff --git a/include/mtd/mtd-abi.h b/include/mtd/mtd-abi.h
index 520a3b48310..1e09e4c8f48 100644
--- a/include/mtd/mtd-abi.h
+++ b/include/mtd/mtd-abi.h
@@ -30,14 +30,13 @@ struct mtd_oob_buf {
 #define MTD_NANDFLASH		4
 #define MTD_DATAFLASH		6
 
-#define MTD_ECC			128	// Device capable of automatic ECC
-#define MTD_PROGRAM_REGIONS	512	// Configurable Programming Regions
 #define MTD_WRITEABLE		0x400	/* Device is writeable */
+#define MTD_BIT_WRITEABLE	0x800	/* Single bits can be flipped */
 
 // Some common devices / combinations of capabilities
 #define MTD_CAP_ROM		0
-#define MTD_CAP_RAM		(MTD_WRITEABLE)
-#define MTD_CAP_NORFLASH	(MTD_WRITEABLE)
+#define MTD_CAP_RAM		(MTD_WRITEABLE | MTD_BIT_WRITEABLE)
+#define MTD_CAP_NORFLASH	(MTD_WRITEABLE | MTD_BIT_WRITEABLE)
 #define MTD_CAP_NANDFLASH	(MTD_WRITEABLE)
 
 
-- 
cgit v1.2.3-70-g09d2