Update MTD to that of Linux 2.6.22.1

A lot changed in the Linux MTD code, since it was last ported from
Linux to U-Boot. This patch takes U-Boot NAND support to the level
of Linux 2.6.22.1 and will enable support for very large NAND devices
(4KB pages) and ease the compatibility between U-Boot and Linux
filesystems.

This patch is tested on two custom boards with PPC and ARM
processors running YAFFS in U-Boot and Linux using gcc-4.1.2
cross compilers.

MAKEALL ppc/arm has some issues:
 * DOC/OneNand/nand_spl is not building (I have not tried porting
   these parts, and since I do not have any HW and I am not familiar
   with this code/HW I think its best left to someone else.)

Except for the issues mentioned above, I have ported all drivers
necessary to run MAKEALL ppc/arm without errors and warnings. Many
drivers were trivial to port, but some were not so trivial. The
following drivers must be examined carefully and maybe rewritten to
some degree:
 cpu/ppc4xx/ndfc.c
 cpu/arm926ejs/davinci/nand.c
 board/delta/nand.c
 board/zylonite/nand.c

Signed-off-by: William Juul <william.juul@tandberg.com>
Signed-off-by: Stig Olsen <stig.olsen@tandberg.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>

1 files changed, 368 insertions, 180 deletions

diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
index a97743b..acf1cf5 100644
--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -6,7 +6,7 @@
  *
  *  Copyright (C) 2004 Thomas Gleixner (tglx@linutronix.de)
  *
- * $Id: nand_bbt.c,v 1.28 2004/11/13 10:19:09 gleixner Exp $
+ * $Id: nand_bbt.c,v 1.36 2005/11/07 11:14:30 gleixner Exp $
  *
  * 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
@@ -48,7 +48,7 @@
  *
  * Following assumptions are made:
  * - bbts start at a page boundary, if autolocated on a block boundary
- * - the space neccecary for a bbt in FLASH does not exceed a block boundary
+ * - the space necessary for a bbt in FLASH does not exceed a block boundary
  *
  */
 
@@ -63,6 +63,19 @@
 
 #include <asm/errno.h>
 
+/* XXX U-BOOT XXX */
+#if 0
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/nand_ecc.h>
+#include <linux/mtd/compatmac.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/vmalloc.h>
+#endif
+
 /**
  * check_pattern - [GENERIC] check if a pattern is in the buffer
  * @buf:	the buffer to search
@@ -76,9 +89,9 @@
  * pattern area contain 0xff
  *
 */
-static int check_pattern (uint8_t *buf, int len, int paglen, struct nand_bbt_descr *td)
+static int check_pattern(uint8_t *buf, int len, int paglen, struct nand_bbt_descr *td)
 {
-	int i, end;
+	int i, end = 0;
 	uint8_t *p = buf;
 
 	end = paglen + td->offs;
@@ -96,9 +109,9 @@ static int check_pattern (uint8_t *buf, int len, int paglen, struct nand_bbt_des
 			return -1;
 	}
 
-	p += td->len;
-	end += td->len;
 	if (td->options & NAND_BBT_SCANEMPTY) {
+		p += td->len;
+		end += td->len;
 		for (i = end; i < len; i++) {
 			if (*p++ != 0xff)
 				return -1;
@@ -108,6 +121,29 @@ static int check_pattern (uint8_t *buf, int len, int paglen, struct nand_bbt_des
 }
 
 /**
+ * check_short_pattern - [GENERIC] check if a pattern is in the buffer
+ * @buf:	the buffer to search
+ * @td:		search pattern descriptor
+ *
+ * Check for a pattern at the given place. Used to search bad block
+ * tables and good / bad block identifiers. Same as check_pattern, but
+ * no optional empty check
+ *
+*/
+static int check_short_pattern(uint8_t *buf, struct nand_bbt_descr *td)
+{
+	int i;
+	uint8_t *p = buf;
+
+	/* Compare the pattern */
+	for (i = 0; i < td->len; i++) {
+		if (p[td->offs + i] != td->pattern[i])
+			return -1;
+	}
+	return 0;
+}
+
+/**
  * read_bbt - [GENERIC] Read the bad block table starting from page
  * @mtd:	MTD device structure
  * @buf:	temporary buffer
@@ -120,8 +156,8 @@ static int check_pattern (uint8_t *buf, int len, int paglen, struct nand_bbt_des
  * Read the bad block table starting from page.
  *
  */
-static int read_bbt (struct mtd_info *mtd, uint8_t *buf, int page, int num,
-	int bits, int offs, int reserved_block_code)
+static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
+		    int bits, int offs, int reserved_block_code)
 {
 	int res, i, j, act = 0;
 	struct nand_chip *this = mtd->priv;
@@ -130,17 +166,17 @@ static int read_bbt (struct mtd_info *mtd, uint8_t *buf, int page, int num,
 	uint8_t msk = (uint8_t) ((1 << bits) - 1);
 
 	totlen = (num * bits) >> 3;
-	from = ((loff_t)page) << this->page_shift;
+	from = ((loff_t) page) << this->page_shift;
 
 	while (totlen) {
-		len = min (totlen, (size_t) (1 << this->bbt_erase_shift));
-		res = mtd->read_ecc (mtd, from, len, &retlen, buf, NULL, this->autooob);
+		len = min(totlen, (size_t) (1 << this->bbt_erase_shift));
+		res = mtd->read(mtd, from, len, &retlen, buf);
 		if (res < 0) {
 			if (retlen != len) {
-				printk (KERN_INFO "nand_bbt: Error reading bad block table\n");
+				printk(KERN_INFO "nand_bbt: Error reading bad block table\n");
 				return res;
 			}
-			printk (KERN_WARNING "nand_bbt: ECC error while reading bad block table\n");
+			printk(KERN_WARNING "nand_bbt: ECC error while reading bad block table\n");
 		}
 
 		/* Analyse data */
@@ -150,22 +186,23 @@ static int read_bbt (struct mtd_info *mtd, uint8_t *buf, int page, int num,
 				uint8_t tmp = (dat >> j) & msk;
 				if (tmp == msk)
 					continue;
-				if (reserved_block_code &&
-				    (tmp == reserved_block_code)) {
-					printk (KERN_DEBUG "nand_read_bbt: Reserved block at 0x%08x\n",
-						((offs << 2) + (act >> 1)) << this->bbt_erase_shift);
+				if (reserved_block_code && (tmp == reserved_block_code)) {
+					printk(KERN_DEBUG "nand_read_bbt: Reserved block at 0x%08x\n",
+					       ((offs << 2) + (act >> 1)) << this->bbt_erase_shift);
 					this->bbt[offs + (act >> 3)] |= 0x2 << (act & 0x06);
+					mtd->ecc_stats.bbtblocks++;
 					continue;
 				}
 				/* Leave it for now, if its matured we can move this
 				 * message to MTD_DEBUG_LEVEL0 */
-				printk (KERN_DEBUG "nand_read_bbt: Bad block at 0x%08x\n",
-					((offs << 2) + (act >> 1)) << this->bbt_erase_shift);
+				printk(KERN_DEBUG "nand_read_bbt: Bad block at 0x%08x\n",
+				       ((offs << 2) + (act >> 1)) << this->bbt_erase_shift);
 				/* Factory marked bad or worn out ? */
 				if (tmp == 0)
 					this->bbt[offs + (act >> 3)] |= 0x3 << (act & 0x06);
 				else
 					this->bbt[offs + (act >> 3)] |= 0x1 << (act & 0x06);
+				mtd->ecc_stats.badblocks++;
 			}
 		}
 		totlen -= len;
@@ -185,7 +222,7 @@ static int read_bbt (struct mtd_info *mtd, uint8_t *buf, int page, int num,
  * Read the bad block table for all chips starting at a given page
  * We assume that the bbt bits are in consecutive order.
 */
-static int read_abs_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip)
+static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip)
 {
 	struct nand_chip *this = mtd->priv;
 	int res = 0, i;
@@ -209,6 +246,42 @@ static int read_abs_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_des
 	return 0;
 }
 
+/*
+ * Scan read raw data from flash
+ */
+static int scan_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
+			 size_t len)
+{
+	struct mtd_oob_ops ops;
+
+	ops.mode = MTD_OOB_RAW;
+	ops.ooboffs = 0;
+	ops.ooblen = mtd->oobsize;
+	ops.oobbuf = buf;
+	ops.datbuf = buf;
+	ops.len = len;
+
+	return mtd->read_oob(mtd, offs, &ops);
+}
+
+/*
+ * Scan write data with oob to flash
+ */
+static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len,
+			  uint8_t *buf, uint8_t *oob)
+{
+	struct mtd_oob_ops ops;
+
+	ops.mode = MTD_OOB_PLACE;
+	ops.ooboffs = 0;
+	ops.ooblen = mtd->oobsize;
+	ops.datbuf = buf;
+	ops.oobbuf = oob;
+	ops.len = len;
+
+	return mtd->write_oob(mtd, offs, &ops);
+}
+
 /**
  * read_abs_bbts - [GENERIC] Read the bad block table(s) for all chips starting at a given page
  * @mtd:	MTD device structure
@@ -220,28 +293,84 @@ static int read_abs_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_des
  * We assume that the bbt bits are in consecutive order.
  *
 */
-static int read_abs_bbts (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td,
-	struct nand_bbt_descr *md)
+static int read_abs_bbts(struct mtd_info *mtd, uint8_t *buf,
+			 struct nand_bbt_descr *td, struct nand_bbt_descr *md)
 {
 	struct nand_chip *this = mtd->priv;
 
 	/* 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];
-		printk (KERN_DEBUG "Bad block table at page %d, version 0x%02X\n", td->pages[0], td->version[0]);
+		scan_read_raw(mtd, buf, td->pages[0] << this->page_shift,
+			      mtd->writesize);
+		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];
-		printk (KERN_DEBUG "Bad block table at page %d, version 0x%02X\n", md->pages[0], md->version[0]);
+		scan_read_raw(mtd, buf, md->pages[0] << this->page_shift,
+			      mtd->writesize);
+		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]);
 	}
-
 	return 1;
 }
 
+/*
+ * Scan a given block full
+ */
+static int scan_block_full(struct mtd_info *mtd, struct nand_bbt_descr *bd,
+			   loff_t offs, uint8_t *buf, size_t readlen,
+			   int scanlen, int len)
+{
+	int ret, j;
+
+	ret = scan_read_raw(mtd, buf, offs, readlen);
+	if (ret)
+		return ret;
+
+	for (j = 0; j < len; j++, buf += scanlen) {
+		if (check_pattern(buf, scanlen, mtd->writesize, bd))
+			return 1;
+	}
+	return 0;
+}
+
+/*
+ * Scan a given block partially
+ */
+static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd,
+			   loff_t offs, uint8_t *buf, int len)
+{
+	struct mtd_oob_ops ops;
+	int j, ret;
+
+	ops.ooblen = mtd->oobsize;
+	ops.oobbuf = buf;
+	ops.ooboffs = 0;
+	ops.datbuf = NULL;
+	ops.mode = MTD_OOB_PLACE;
+
+	for (j = 0; j < len; j++) {
+		/*
+		 * Read the full oob until read_oob is fixed to
+		 * handle single byte reads for 16 bit
+		 * buswidth
+		 */
+		ret = mtd->read_oob(mtd, offs, &ops);
+		if (ret)
+			return ret;
+
+		if (check_short_pattern(buf, bd))
+			return 1;
+
+		offs += mtd->writesize;
+	}
+	return 0;
+}
+
 /**
  * create_bbt - [GENERIC] Create a bad block table by scanning the device
  * @mtd:	MTD device structure
@@ -253,13 +382,16 @@ static int read_abs_bbts (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_de
  * Create a bad block table by scanning the device
  * for the given good/bad block identify pattern
  */
-static void create_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd, int chip)
+static int create_bbt(struct mtd_info *mtd, uint8_t *buf,
+	struct nand_bbt_descr *bd, int chip)
 {
 	struct nand_chip *this = mtd->priv;
-	int i, j, numblocks, len, scanlen;
+	int i, numblocks, len, scanlen;
 	int startblock;
 	loff_t from;
-	size_t readlen, ooblen;
+	size_t readlen;
+
+	printk(KERN_INFO "Scanning device for bad blocks\n");
 
 	if (bd->options & NAND_BBT_SCANALLPAGES)
 		len = 1 << (this->bbt_erase_shift - this->page_shift);
@@ -269,21 +401,28 @@ static void create_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_desc
 		else
 			len = 1;
 	}
-	scanlen	= mtd->oobblock + mtd->oobsize;
-	readlen = len * mtd->oobblock;
-	ooblen = len * mtd->oobsize;
+
+	if (!(bd->options & NAND_BBT_SCANEMPTY)) {
+		/* We need only read few bytes from the OOB area */
+		scanlen = 0;
+		readlen = bd->len;
+	} else {
+		/* Full page content should be read */
+		scanlen = mtd->writesize + mtd->oobsize;
+		readlen = len * mtd->writesize;
+	}
 
 	if (chip == -1) {
-		/* Note that numblocks is 2 * (real numblocks) here, see i+=2 below as it
-		 * makes shifting and masking less painful */
+		/* Note that numblocks is 2 * (real numblocks) here, see i+=2
+		 * below as it makes shifting and masking less painful */
 		numblocks = mtd->size >> (this->bbt_erase_shift - 1);
 		startblock = 0;
 		from = 0;
 	} else {
 		if (chip >= this->numchips) {
-			printk (KERN_WARNING "create_bbt(): chipnr (%d) > available chips (%d)\n",
-				chip + 1, this->numchips);
-			return;
+			printk(KERN_WARNING "create_bbt(): chipnr (%d) > available chips (%d)\n",
+			       chip + 1, this->numchips);
+			return -EINVAL;
 		}
 		numblocks = this->chipsize >> (this->bbt_erase_shift - 1);
 		startblock = chip * numblocks;
@@ -292,16 +431,28 @@ static void create_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_desc
 	}
 
 	for (i = startblock; i < numblocks;) {
-		nand_read_raw (mtd, buf, from, readlen, ooblen);
-		for (j = 0; j < len; j++) {
-			if (check_pattern (&buf[j * scanlen], scanlen, mtd->oobblock, bd)) {
-				this->bbt[i >> 3] |= 0x03 << (i & 0x6);
-				break;
-			}
+		int ret;
+
+		if (bd->options & NAND_BBT_SCANALLPAGES)
+			ret = scan_block_full(mtd, bd, from, buf, readlen,
+					      scanlen, len);
+		else
+			ret = scan_block_fast(mtd, bd, from, buf, len);
+
+		if (ret < 0)
+			return ret;
+
+		if (ret) {
+			this->bbt[i >> 3] |= 0x03 << (i & 0x6);
+			printk(KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
+			       i >> 1, (unsigned int)from);
+			mtd->ecc_stats.badblocks++;
 		}
+
 		i += 2;
 		from += (1 << this->bbt_erase_shift);
 	}
+	return 0;
 }
 
 /**
@@ -316,22 +467,23 @@ static void create_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_desc
  * block.
  * If the option NAND_BBT_PERCHIP is given, each chip is searched
  * for a bbt, which contains the bad block information of this chip.
- * This is neccecary to provide support for certain DOC devices.
+ * This is necessary to provide support for certain DOC devices.
  *
  * The bbt ident pattern resides in the oob area of the first page
  * in a block.
  */
-static int search_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td)
+static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td)
 {
 	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;
+	int blocktopage = this->bbt_erase_shift - this->page_shift;
 
 	/* Search direction top -> down ? */
 	if (td->options & NAND_BBT_LASTBLOCK) {
-		startblock = (mtd->size >> this->bbt_erase_shift) -1;
+		startblock = (mtd->size >> this->bbt_erase_shift) - 1;
 		dir = -1;
 	} else {
 		startblock = 0;
@@ -357,13 +509,16 @@ static int search_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
 		td->pages[i] = -1;
 		/* Scan the maximum number of blocks */
 		for (block = 0; block < td->maxblocks; block++) {
+
 			int actblock = startblock + dir * block;
+			loff_t offs = actblock << this->bbt_erase_shift;
+
 			/* 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)) {
-				td->pages[i] = actblock << (this->bbt_erase_shift - this->page_shift);
+			scan_read_raw(mtd, buf, offs, mtd->writesize);
+			if (!check_pattern(buf, scanlen, mtd->writesize, td)) {
+				td->pages[i] = actblock << blocktopage;
 				if (td->options & NAND_BBT_VERSION) {
-					td->version[i] = buf[mtd->oobblock + td->veroffs];
+					td->version[i] = buf[mtd->writesize + td->veroffs];
 				}
 				break;
 			}
@@ -373,9 +528,10 @@ static int search_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
 	/* Check, if we found a bbt for each requested chip */
 	for (i = 0; i < chips; i++) {
 		if (td->pages[i] == -1)
-			printk (KERN_WARNING "Bad block table not found for chip %d\n", i);
+			printk(KERN_WARNING "Bad block table not found for chip %d\n", i);
 		else
-			printk (KERN_DEBUG "Bad block table found at page %d, version 0x%02X\n", td->pages[i], td->version[i]);
+			printk(KERN_DEBUG "Bad block table found at page %d, version 0x%02X\n", td->pages[i],
+			       td->version[i]);
 	}
 	return 0;
 }
@@ -389,21 +545,19 @@ static int search_bbt (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
  *
  * Search and read the bad block table(s)
 */
-static int search_read_bbts (struct mtd_info *mtd, uint8_t *buf,
-	struct nand_bbt_descr *td, struct nand_bbt_descr *md)
+static int search_read_bbts(struct mtd_info *mtd, uint8_t * buf, struct nand_bbt_descr *td, struct nand_bbt_descr *md)
 {
 	/* Search the primary table */
-	search_bbt (mtd, buf, td);
+	search_bbt(mtd, buf, td);
 
 	/* Search the mirror table */
 	if (md)
-		search_bbt (mtd, buf, md);
+		search_bbt(mtd, buf, md);
 
 	/* Force result check */
 	return 1;
 }
 
-
 /**
  * write_bbt - [GENERIC] (Re)write the bad block table
  *
@@ -416,25 +570,31 @@ static int search_read_bbts (struct mtd_info *mtd, uint8_t *buf,
  * (Re)write the bad block table
  *
 */
-static int write_bbt (struct mtd_info *mtd, uint8_t *buf,
-	struct nand_bbt_descr *td, struct nand_bbt_descr *md, int chipsel)
+static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
+		     struct nand_bbt_descr *td, struct nand_bbt_descr *md,
+		     int chipsel)
 {
 	struct nand_chip *this = mtd->priv;
-	struct nand_oobinfo oobinfo;
 	struct erase_info einfo;
 	int i, j, res, chip = 0;
 	int bits, startblock, dir, page, offs, numblocks, sft, sftmsk;
-	int nrchips, bbtoffs, pageoffs;
+	int nrchips, bbtoffs, pageoffs, ooboffs;
 	uint8_t msk[4];
 	uint8_t rcode = td->reserved_block_code;
 	size_t retlen, len = 0;
 	loff_t to;
+	struct mtd_oob_ops ops;
+
+	ops.ooblen = mtd->oobsize;
+	ops.ooboffs = 0;
+	ops.datbuf = NULL;
+	ops.mode = MTD_OOB_PLACE;
 
 	if (!rcode)
 		rcode = 0xff;
 	/* Write bad block table per chip rather than per device ? */
 	if (td->options & NAND_BBT_PERCHIP) {
-		numblocks = (int) (this->chipsize >> this->bbt_erase_shift);
+		numblocks = (int)(this->chipsize >> this->bbt_erase_shift);
 		/* Full device write or specific chip ? */
 		if (chipsel == -1) {
 			nrchips = this->numchips;
@@ -443,7 +603,7 @@ static int write_bbt (struct mtd_info *mtd, uint8_t *buf,
 			chip = chipsel;
 		}
 	} else {
-		numblocks = (int) (mtd->size >> this->bbt_erase_shift);
+		numblocks = (int)(mtd->size >> this->bbt_erase_shift);
 		nrchips = 1;
 	}
 
@@ -472,27 +632,38 @@ static int write_bbt (struct mtd_info *mtd, uint8_t *buf,
 		for (i = 0; i < td->maxblocks; i++) {
 			int block = startblock + dir * i;
 			/* Check, if the block is bad */
-			switch ((this->bbt[block >> 2] >> (2 * (block & 0x03))) & 0x03) {
+			switch ((this->bbt[block >> 2] >>
+				 (2 * (block & 0x03))) & 0x03) {
 			case 0x01:
 			case 0x03:
 				continue;
 			}
-			page = block << (this->bbt_erase_shift - this->page_shift);
+			page = block <<
+				(this->bbt_erase_shift - this->page_shift);
 			/* Check, if the block is used by the mirror table */
 			if (!md || md->pages[chip] != page)
 				goto write;
 		}
-		printk (KERN_ERR "No space left to write bad block table\n");
+		printk(KERN_ERR "No space left to write bad block table\n");
 		return -ENOSPC;
-write:
+	write:
 
 		/* Set up shift count and masks for the flash table */
 		bits = td->options & NAND_BBT_NRBITS_MSK;
+		msk[2] = ~rcode;
 		switch (bits) {
-		case 1: sft = 3; sftmsk = 0x07; msk[0] = 0x00; msk[1] = 0x01; msk[2] = ~rcode; msk[3] = 0x01; break;
-		case 2: sft = 2; sftmsk = 0x06; msk[0] = 0x00; msk[1] = 0x01; msk[2] = ~rcode; msk[3] = 0x03; break;
-		case 4: sft = 1; sftmsk = 0x04; msk[0] = 0x00; msk[1] = 0x0C; msk[2] = ~rcode; msk[3] = 0x0f; break;
-		case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F; msk[2] = ~rcode; msk[3] = 0xff; break;
+		case 1: sft = 3; sftmsk = 0x07; msk[0] = 0x00; msk[1] = 0x01;
+			msk[3] = 0x01;
+			break;
+		case 2: sft = 2; sftmsk = 0x06; msk[0] = 0x00; msk[1] = 0x01;
+			msk[3] = 0x03;
+			break;
+		case 4: sft = 1; sftmsk = 0x04; msk[0] = 0x00; msk[1] = 0x0C;
+			msk[3] = 0x0f;
+			break;
+		case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F;
+			msk[3] = 0xff;
+			break;
 		default: return -EINVAL;
 		}
 
@@ -500,82 +671,92 @@ write:
 
 		to = ((loff_t) page) << this->page_shift;
 
-		memcpy (&oobinfo, this->autooob, sizeof(oobinfo));
-		oobinfo.useecc = MTD_NANDECC_PLACEONLY;
-
 		/* Must we save the block contents ? */
 		if (td->options & NAND_BBT_SAVECONTENT) {
 			/* Make it block aligned */
 			to &= ~((loff_t) ((1 << this->bbt_erase_shift) - 1));
 			len = 1 << this->bbt_erase_shift;
-			res = mtd->read_ecc (mtd, to, len, &retlen, buf, &buf[len], &oobinfo);
+			res = mtd->read(mtd, to, len, &retlen, buf);
 			if (res < 0) {
 				if (retlen != len) {
-					printk (KERN_INFO "nand_bbt: Error reading block for writing the bad block table\n");
+					printk(KERN_INFO "nand_bbt: Error "
+					       "reading block for writing "
+					       "the bad block table\n");
 					return res;
 				}
-				printk (KERN_WARNING "nand_bbt: ECC error while reading block for writing bad block table\n");
+				printk(KERN_WARNING "nand_bbt: ECC error "
+				       "while reading block for writing "
+				       "bad block table\n");
 			}
+			/* Read oob data */
+			ops.ooblen = (len >> this->page_shift) * mtd->oobsize;
+			ops.oobbuf = &buf[len];
+			res = mtd->read_oob(mtd, to + mtd->writesize, &ops);
+			if (res < 0 || ops.oobretlen != ops.ooblen)
+				goto outerr;
+
 			/* Calc the byte offset in the buffer */
 			pageoffs = page - (int)(to >> this->page_shift);
 			offs = pageoffs << this->page_shift;
 			/* Preset the bbt area with 0xff */
-			memset (&buf[offs], 0xff, (size_t)(numblocks >> sft));
-			/* Preset the bbt's oob area with 0xff */
-			memset (&buf[len + pageoffs * mtd->oobsize], 0xff,
-				((len >> this->page_shift) - pageoffs) * mtd->oobsize);
-			if (td->options & NAND_BBT_VERSION) {
-				buf[len + (pageoffs * mtd->oobsize) + td->veroffs] = td->version[chip];
-			}
+			memset(&buf[offs], 0xff, (size_t) (numblocks >> sft));
+			ooboffs = len + (pageoffs * mtd->oobsize);
+
 		} else {
 			/* 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);
+			memset(buf, 0xff, len +
+			       (len >> this->page_shift)* mtd->oobsize);
 			offs = 0;
+			ooboffs = len;
 			/* Pattern is located in oob area of first page */
-			memcpy (&buf[len + td->offs], td->pattern, td->len);
-			if (td->options & NAND_BBT_VERSION) {
-				buf[len + td->veroffs] = td->version[chip];
-			}
+			memcpy(&buf[ooboffs + td->offs], td->pattern, td->len);
 		}
 
+		if (td->options & NAND_BBT_VERSION)
+			buf[ooboffs + td->veroffs] = td->version[chip];
+
 		/* walk through the memory table */
-		for (i = 0; i < numblocks; ) {
+		for (i = 0; i < numblocks;) {
 			uint8_t dat;
 			dat = this->bbt[bbtoffs + (i >> 2)];
-			for (j = 0; j < 4; j++ , i++) {
+			for (j = 0; j < 4; j++, i++) {
 				int sftcnt = (i << (3 - sft)) & sftmsk;
 				/* Do not store the reserved bbt blocks ! */
-				buf[offs + (i >> sft)] &= ~(msk[dat & 0x03] << sftcnt);
+				buf[offs + (i >> sft)] &=
+					~(msk[dat & 0x03] << sftcnt);
 				dat >>= 2;
 			}
 		}
 
-		memset (&einfo, 0, sizeof (einfo));
+		memset(&einfo, 0, sizeof(einfo));
 		einfo.mtd = mtd;
-		einfo.addr = (unsigned long) to;
+		einfo.addr = (unsigned long)to;
 		einfo.len = 1 << this->bbt_erase_shift;
-		res = nand_erase_nand (mtd, &einfo, 1);
-		if (res < 0) {
-			printk (KERN_WARNING "nand_bbt: Error during block erase: %d\n", res);
-			return res;
-		}
+		res = nand_erase_nand(mtd, &einfo, 1);
+		if (res < 0)
+			goto outerr;
 
-		res = mtd->write_ecc (mtd, to, len, &retlen, buf, &buf[len], &oobinfo);
-		if (res < 0) {
-			printk (KERN_WARNING "nand_bbt: Error while writing bad block table %d\n", res);
-			return res;
-		}
-		printk (KERN_DEBUG "Bad block table written to 0x%08x, version 0x%02X\n",
-			(unsigned int) to, td->version[chip]);
+		res = scan_write_bbt(mtd, to, len, buf, &buf[len]);
+		if (res < 0)
+			goto outerr;
+
+		printk(KERN_DEBUG "Bad block table written to 0x%08x, version "
+		       "0x%02X\n", (unsigned int)to, td->version[chip]);
 
 		/* Mark it as used */
 		td->pages[chip] = page;
 	}
 	return 0;
+
+ outerr:
+	printk(KERN_WARNING
+	       "nand_bbt: Error while writing bad block table %d\n", res);
+	return res;
 }
 
 /**
@@ -586,29 +767,27 @@ write:
  * The function creates a memory based bbt by scanning the device
  * for manufacturer / software marked good / bad blocks
 */
-static int nand_memory_bbt (struct mtd_info *mtd, struct nand_bbt_descr *bd)
+static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
 {
 	struct nand_chip *this = mtd->priv;
 
-	/* Ensure that we only scan for the pattern and nothing else */
-	bd->options = 0;
-	create_bbt (mtd, this->data_buf, bd, -1);
-	return 0;
+	bd->options &= ~NAND_BBT_SCANEMPTY;
+	return create_bbt(mtd, this->buffers->databuf, bd, -1);
 }
 
 /**
- * check_create - [GENERIC] create and write bbt(s) if neccecary
+ * check_create - [GENERIC] create and write bbt(s) if necessary
  * @mtd:	MTD device structure
  * @buf:	temporary buffer
  * @bd:		descriptor for the good/bad block search pattern
  *
  * The function checks the results of the previous call to read_bbt
- * and creates / updates the bbt(s) if neccecary
- * Creation is neccecary if no bbt was found for the chip/device
- * Update is neccecary if one of the tables is missing or the
+ * and creates / updates the bbt(s) if necessary
+ * Creation is necessary if no bbt was found for the chip/device
+ * Update is necessary if one of the tables is missing or the
  * version nr. of one table is less than the other
 */
-static int check_create (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd)
+static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd)
 {
 	int i, chips, writeops, chipsel, res;
 	struct nand_chip *this = mtd->priv;
@@ -676,35 +855,35 @@ static int check_create (struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_des
 			rd = td;
 			goto writecheck;
 		}
-create:
+	create:
 		/* Create the bad block table by scanning the device ? */
 		if (!(td->options & NAND_BBT_CREATE))
 			continue;
 
 		/* Create the table in memory by scanning the chip(s) */
-		create_bbt (mtd, buf, bd, chipsel);
+		create_bbt(mtd, buf, bd, chipsel);
 
 		td->version[i] = 1;
 		if (md)
 			md->version[i] = 1;
-writecheck:
+	writecheck:
 		/* read back first ? */
 		if (rd)
-			read_abs_bbt (mtd, buf, rd, chipsel);
+			read_abs_bbt(mtd, buf, rd, chipsel);
 		/* If they weren't versioned, read both. */
 		if (rd2)
-			read_abs_bbt (mtd, buf, rd2, chipsel);
+			read_abs_bbt(mtd, buf, rd2, chipsel);
 
 		/* Write the bad block table to the device ? */
 		if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) {
-			res = write_bbt (mtd, buf, td, md, chipsel);
+			res = write_bbt(mtd, buf, td, md, chipsel);
 			if (res < 0)
 				return res;
 		}
 
 		/* Write the mirror bad block table to the device ? */
 		if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) {
-			res = write_bbt (mtd, buf, md, td, chipsel);
+			res = write_bbt(mtd, buf, md, td, chipsel);
 			if (res < 0)
 				return res;
 		}
@@ -721,7 +900,7 @@ writecheck:
  * accidental erasures / writes. The regions are identified by
  * the mark 0x02.
 */
-static void mark_bbt_region (struct mtd_info *mtd, struct nand_bbt_descr *td)
+static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)
 {
 	struct nand_chip *this = mtd->priv;
 	int i, j, chips, block, nrblocks, update;
@@ -739,7 +918,8 @@ static void mark_bbt_region (struct mtd_info *mtd, struct nand_bbt_descr *td)
 	for (i = 0; i < chips; i++) {
 		if ((td->options & NAND_BBT_ABSPAGE) ||
 		    !(td->options & NAND_BBT_WRITE)) {
-			if (td->pages[i] == -1) continue;
+			if (td->pages[i] == -1)
+				continue;
 			block = td->pages[i] >> (this->bbt_erase_shift - this->page_shift);
 			block <<= 1;
 			oldval = this->bbt[(block >> 3)];
@@ -759,7 +939,8 @@ static void mark_bbt_region (struct mtd_info *mtd, struct nand_bbt_descr *td)
 			oldval = this->bbt[(block >> 3)];
 			newval = oldval | (0x2 << (block & 0x06));
 			this->bbt[(block >> 3)] = newval;
-			if (oldval != newval) update = 1;
+			if (oldval != newval)
+				update = 1;
 			block += 2;
 		}
 		/* If we want reserved blocks to be recorded to flash, and some
@@ -784,7 +965,7 @@ static void mark_bbt_region (struct mtd_info *mtd, struct nand_bbt_descr *td)
  * by calling the nand_free_bbt function.
  *
 */
-int nand_scan_bbt (struct mtd_info *mtd, struct nand_bbt_descr *bd)
+int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
 {
 	struct nand_chip *this = mtd->priv;
 	int len, res = 0;
@@ -793,53 +974,56 @@ int nand_scan_bbt (struct mtd_info *mtd, struct nand_bbt_descr *bd)
 	struct nand_bbt_descr *md = this->bbt_md;
 
 	len = mtd->size >> (this->bbt_erase_shift + 2);
-	/* Allocate memory (2bit per block) */
-	this->bbt = kmalloc (len, GFP_KERNEL);
+	/* Allocate memory (2bit per block) and clear the memory bad block table */
+	this->bbt = kzalloc(len, GFP_KERNEL);
 	if (!this->bbt) {
-		printk (KERN_ERR "nand_scan_bbt: Out of memory\n");
+		printk(KERN_ERR "nand_scan_bbt: Out of memory\n");
 		return -ENOMEM;
 	}
-	/* Clear the memory bad block table */
-	memset (this->bbt, 0x00, len);
 
 	/* If no primary table decriptor is given, scan the device
 	 * to build a memory based bad block table
 	 */
-	if (!td)
-		return nand_memory_bbt(mtd, bd);
+	if (!td) {
+		if ((res = nand_memory_bbt(mtd, bd))) {
+			printk(KERN_ERR "nand_bbt: Can't scan flash and build the RAM-based BBT\n");
+			kfree(this->bbt);
+			this->bbt = NULL;
+		}
+		return res;
+	}
 
 	/* Allocate a temporary buffer for one eraseblock incl. oob */
 	len = (1 << this->bbt_erase_shift);
 	len += (len >> this->page_shift) * mtd->oobsize;
-	buf = kmalloc (len, GFP_KERNEL);
+	buf = vmalloc(len);
 	if (!buf) {
-		printk (KERN_ERR "nand_bbt: Out of memory\n");
-		kfree (this->bbt);
+		printk(KERN_ERR "nand_bbt: Out of memory\n");
+		kfree(this->bbt);
 		this->bbt = NULL;
 		return -ENOMEM;
 	}
 
 	/* Is the bbt at a given page ? */
 	if (td->options & NAND_BBT_ABSPAGE) {
-		res = read_abs_bbts (mtd, buf, td, md);
+		res = read_abs_bbts(mtd, buf, td, md);
 	} else {
 		/* Search the bad block table using a pattern in oob */
-		res = search_read_bbts (mtd, buf, td, md);
+		res = search_read_bbts(mtd, buf, td, md);
 	}
 
 	if (res)
-		res = check_create (mtd, buf, bd);
+		res = check_create(mtd, buf, bd);
 
 	/* Prevent the bbt regions from erasing / writing */
-	mark_bbt_region (mtd, td);
+	mark_bbt_region(mtd, td);
 	if (md)
-		mark_bbt_region (mtd, md);
+		mark_bbt_region(mtd, md);
 
-	kfree (buf);
+	vfree(buf);
 	return res;
 }
 
-
 /**
  * nand_update_bbt - [NAND Interface] update bad block table(s)
  * @mtd:	MTD device structure
@@ -847,7 +1031,7 @@ int nand_scan_bbt (struct mtd_info *mtd, struct nand_bbt_descr *bd)
  *
  * The function updates the bad block table(s)
 */
-int nand_update_bbt (struct mtd_info *mtd, loff_t offs)
+int nand_update_bbt(struct mtd_info *mtd, loff_t offs)
 {
 	struct nand_chip *this = mtd->priv;
 	int len, res = 0, writeops = 0;
@@ -863,9 +1047,9 @@ int nand_update_bbt (struct mtd_info *mtd, loff_t offs)
 	/* Allocate a temporary buffer for one eraseblock incl. oob */
 	len = (1 << this->bbt_erase_shift);
 	len += (len >> this->page_shift) * mtd->oobsize;
-	buf = kmalloc (len, GFP_KERNEL);
+	buf = kmalloc(len, GFP_KERNEL);
 	if (!buf) {
-		printk (KERN_ERR "nand_update_bbt: Out of memory\n");
+		printk(KERN_ERR "nand_update_bbt: Out of memory\n");
 		return -ENOMEM;
 	}
 
@@ -873,7 +1057,7 @@ int nand_update_bbt (struct mtd_info *mtd, loff_t offs)
 
 	/* Do we have a bbt per chip ? */
 	if (td->options & NAND_BBT_PERCHIP) {
-		chip = (int) (offs >> this->chip_shift);
+		chip = (int)(offs >> this->chip_shift);
 		chipsel = chip;
 	} else {
 		chip = 0;
@@ -886,29 +1070,26 @@ int nand_update_bbt (struct mtd_info *mtd, loff_t offs)
 
 	/* Write the bad block table to the device ? */
 	if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) {
-		res = write_bbt (mtd, buf, td, md, chipsel);
+		res = write_bbt(mtd, buf, td, md, chipsel);
 		if (res < 0)
 			goto out;
 	}
 	/* Write the mirror bad block table to the device ? */
 	if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) {
-		res = write_bbt (mtd, buf, md, td, chipsel);
+		res = write_bbt(mtd, buf, md, td, chipsel);
 	}
 
-out:
-	kfree (buf);
+ out:
+	kfree(buf);
 	return res;
 }
 
 /* Define some generic bad / good block scan pattern which are used
- * while scanning a device for factory marked good / bad blocks
- *
- * The memory based patterns just
- */
+ * while scanning a device for factory marked good / bad blocks. */
 static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
 
 static struct nand_bbt_descr smallpage_memorybased = {
-	.options = 0,
+	.options = NAND_BBT_SCAN2NDPAGE,
 	.offs = 5,
 	.len = 1,
 	.pattern = scan_ff_pattern
@@ -922,14 +1103,14 @@ static struct nand_bbt_descr largepage_memorybased = {
 };
 
 static struct nand_bbt_descr smallpage_flashbased = {
-	.options = NAND_BBT_SCANEMPTY | NAND_BBT_SCANALLPAGES,
+	.options = NAND_BBT_SCAN2NDPAGE,
 	.offs = 5,
 	.len = 1,
 	.pattern = scan_ff_pattern
 };
 
 static struct nand_bbt_descr largepage_flashbased = {
-	.options = NAND_BBT_SCANEMPTY | NAND_BBT_SCANALLPAGES,
+	.options = NAND_BBT_SCAN2NDPAGE,
 	.offs = 0,
 	.len = 2,
 	.pattern = scan_ff_pattern
@@ -977,7 +1158,7 @@ static struct nand_bbt_descr bbt_mirror_descr = {
  * support for the device and calls the nand_scan_bbt function
  *
 */
-int nand_default_bbt (struct mtd_info *mtd)
+int nand_default_bbt(struct mtd_info *mtd)
 {
 	struct nand_chip *this = mtd->priv;
 
@@ -987,7 +1168,7 @@ int nand_default_bbt (struct mtd_info *mtd)
 	 * of the good / bad information, so we _must_ store
 	 * this information in a good / bad table during
 	 * startup
-	*/
+	 */
 	if (this->options & NAND_IS_AND) {
 		/* Use the default pattern descriptors */
 		if (!this->bbt_td) {
@@ -995,10 +1176,9 @@ int nand_default_bbt (struct mtd_info *mtd)
 			this->bbt_md = &bbt_mirror_descr;
 		}
 		this->options |= NAND_USE_FLASH_BBT;
-		return nand_scan_bbt (mtd, &agand_flashbased);
+		return nand_scan_bbt(mtd, &agand_flashbased);
 	}
 
-
 	/* Is a flash based bad block table requested ? */
 	if (this->options & NAND_USE_FLASH_BBT) {
 		/* Use the default pattern descriptors */
@@ -1007,18 +1187,17 @@ 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) ?
-				&largepage_memorybased : &smallpage_memorybased;
+			this->badblock_pattern = (mtd->writesize > 512) ?
+			    &largepage_memorybased : &smallpage_memorybased;
 		}
 	}
-	return nand_scan_bbt (mtd, this->badblock_pattern);
+	return nand_scan_bbt(mtd, this->badblock_pattern);
 }
 
 /**
@@ -1027,26 +1206,35 @@ int nand_default_bbt (struct mtd_info *mtd)
  * @offs:	offset in the device
  * @allowbbt:	allow access to bad block table region
  *
- */
-int nand_isbad_bbt (struct mtd_info *mtd, loff_t offs, int allowbbt)
+*/
+int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
 {
 	struct nand_chip *this = mtd->priv;
 	int block;
-	uint8_t	res;
+	uint8_t res;
 
 	/* Get block number * 2 */
-	block = (int) (offs >> (this->bbt_erase_shift - 1));
+	block = (int)(offs >> (this->bbt_erase_shift - 1));
 	res = (this->bbt[block >> 3] >> (block & 0x06)) & 0x03;
 
 	MTDDEBUG (MTD_DEBUG_LEVEL2, "nand_isbad_bbt(): bbt info for offs 0x%08x: "
 	          "(block %d) 0x%02x\n", (unsigned int)offs, res, block >> 1);
 
 	switch ((int)res) {
-	case 0x00:	return 0;
-	case 0x01:	return 1;
-	case 0x02:	return allowbbt ? 0 : 1;
+	case 0x00:
+		return 0;
+	case 0x01:
+		return 1;
+	case 0x02:
+		return allowbbt ? 0 : 1;
 	}
 	return 1;
 }
 
+/* XXX U-BOOT XXX */
+#if 0
+EXPORT_SYMBOL(nand_scan_bbt);
+EXPORT_SYMBOL(nand_default_bbt);
+#endif
+
 #endif