*
* Copyright (C) 2004 Thomas Gleixner (tglx@linutronix.de)
*
- * $Id: nand_bbt.c,v 1.28 2004/11/13 10:19:09 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
* published by the Free Software Foundation.
* Description:
*
* When nand_scan_bbt is called, then it tries to find the bad block table
- * depending on the options in the bbt descriptor(s). If a bbt is found
- * then the contents are read and the memory based bbt is created. If a
- * mirrored bbt is selected then the mirror is searched too and the
- * versions are compared. If the mirror has a greater version number
- * than the mirror bbt is used to build the memory based bbt.
+ * depending on the options in the BBT descriptor(s). If no flash based BBT
+ * (NAND_USE_FLASH_BBT) is specified then the device is scanned for factory
+ * marked good / bad blocks. This information is used to create a memory BBT.
+ * Once a new bad block is discovered then the "factory" information is updated
+ * on the device.
+ * If a flash based BBT is specified then the function first tries to find the
+ * BBT on flash. If a BBT is found then the contents are read and the memory
+ * based BBT is created. If a mirrored BBT is selected then the mirror is
+ * searched too and the versions are compared. If the mirror has a greater
+ * version number than the mirror BBT is used to build the memory based BBT.
* If the tables are not versioned, then we "or" the bad block information.
- * If one of the bbt's is out of date or does not exist it is (re)created.
- * If no bbt exists at all then the device is scanned for factory marked
+ * If one of the BBTs is out of date or does not exist it is (re)created.
+ * If no BBT exists at all then the device is scanned for factory marked
* good / bad blocks and the bad block tables are created.
*
- * For manufacturer created bbts like the one found on M-SYS DOC devices
- * the bbt is searched and read but never created
+ * For manufacturer created BBTs like the one found on M-SYS DOC devices
+ * the BBT is searched and read but never created
*
- * The autogenerated bad block table is located in the last good blocks
+ * The auto generated bad block table is located in the last good blocks
* of the device. The table is mirrored, so it can be updated eventually.
- * The table is marked in the oob area with an ident pattern and a version
- * number which indicates which of both tables is more up to date.
+ * The table is marked in the OOB area with an ident pattern and a version
+ * number which indicates which of both tables is more up to date. If the NAND
+ * controller needs the complete OOB area for the ECC information then the
+ * option NAND_USE_FLASH_BBT_NO_OOB should be used: it moves the ident pattern
+ * and the version byte into the data area and the OOB area will remain
+ * untouched.
*
* The table uses 2 bits per block
- * 11b: block is good
- * 00b: block is factory marked bad
+ * 11b: block is good
+ * 00b: block is factory marked bad
* 01b, 10b: block is marked bad due to wear
*
* The memory bad block table uses the following scheme:
*
* 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
*
*/
#include <common.h>
-
-#if defined(CONFIG_CMD_NAND) && !defined(CFG_NAND_LEGACY)
-
#include <malloc.h>
-#include <linux/mtd/compat.h>
+#include <linux/compat.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
+#include <linux/mtd/nand_ecc.h>
+#include <linux/bitops.h>
#include <asm/errno.h>
+static int check_pattern_no_oob(uint8_t *buf, struct nand_bbt_descr *td)
+{
+ int ret;
+
+ ret = memcmp(buf, td->pattern, td->len);
+ if (!ret)
+ return ret;
+ return -1;
+}
+
/**
* check_pattern - [GENERIC] check if a pattern is in the buffer
* @buf: the buffer to search
* 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;
+ if (td->options & NAND_BBT_NO_OOB)
+ return check_pattern_no_oob(buf, td);
+
end = paglen + td->offs;
if (td->options & NAND_BBT_SCANEMPTY) {
for (i = 0; i < end; i++) {
return -1;
}
- p += td->len;
- end += td->len;
+ /* Check both positions 1 and 6 for pattern? */
+ if (td->options & NAND_BBT_SCANBYTE1AND6) {
+ if (td->options & NAND_BBT_SCANEMPTY) {
+ p += td->len;
+ end += NAND_SMALL_BADBLOCK_POS - td->offs;
+ /* Check region between positions 1 and 6 */
+ for (i = 0; i < NAND_SMALL_BADBLOCK_POS - td->offs - td->len;
+ i++) {
+ if (*p++ != 0xff)
+ return -1;
+ }
+ }
+ else {
+ p += NAND_SMALL_BADBLOCK_POS - td->offs;
+ }
+ /* Compare the pattern */
+ for (i = 0; i < td->len; i++) {
+ if (p[i] != td->pattern[i])
+ return -1;
+ }
+ }
+
if (td->options & NAND_BBT_SCANEMPTY) {
+ p += td->len;
+ end += td->len;
for (i = end; i < len; i++) {
if (*p++ != 0xff)
return -1;
return 0;
}
+/**
+ * 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;
+ }
+ /* Need to check location 1 AND 6? */
+ if (td->options & NAND_BBT_SCANBYTE1AND6) {
+ for (i = 0; i < td->len; i++) {
+ if (p[NAND_SMALL_BADBLOCK_POS + i] != td->pattern[i])
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/**
+ * add_marker_len - compute the length of the marker in data area
+ * @td: BBT descriptor used for computation
+ *
+ * The length will be 0 if the markeris located in OOB area.
+ */
+static u32 add_marker_len(struct nand_bbt_descr *td)
+{
+ u32 len;
+
+ if (!(td->options & NAND_BBT_NO_OOB))
+ return 0;
+
+ len = td->len;
+ if (td->options & NAND_BBT_VERSION)
+ len++;
+ return len;
+}
+
/**
* read_bbt - [GENERIC] Read the bad block table starting from page
* @mtd: MTD device structure
* @buf: temporary buffer
* @page: the starting page
* @num: the number of bbt descriptors to read
- * @bits: number of bits per block
+ * @td: the bbt describtion table
* @offs: offset in the memory table
- * @reserved_block_code: Pattern to identify reserved blocks
*
* 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,
+ struct nand_bbt_descr *td, int offs)
{
int res, i, j, act = 0;
struct nand_chip *this = mtd->priv;
size_t retlen, len, totlen;
loff_t from;
+ int bits = td->options & NAND_BBT_NRBITS_MSK;
uint8_t msk = (uint8_t) ((1 << bits) - 1);
+ u32 marker_len;
+ int reserved_block_code = td->reserved_block_code;
totlen = (num * bits) >> 3;
- from = ((loff_t)page) << this->page_shift;
+ marker_len = add_marker_len(td);
+ 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));
+ if (marker_len) {
+ /*
+ * In case the BBT marker is not in the OOB area it
+ * will be just in the first page.
+ */
+ len -= marker_len;
+ from += marker_len;
+ marker_len = 0;
+ }
+ 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 */
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%012llx\n",
+ (loff_t)((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);
+ MTDDEBUG(MTD_DEBUG_LEVEL0, "nand_read_bbt: Bad block at 0x%012llx\n",
+ (loff_t)((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;
* 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;
- int bits;
- bits = td->options & NAND_BBT_NRBITS_MSK;
if (td->options & NAND_BBT_PERCHIP) {
int offs = 0;
for (i = 0; i < this->numchips; i++) {
if (chip == -1 || chip == i)
- res = read_bbt (mtd, buf, td->pages[i], this->chipsize >> this->bbt_erase_shift, bits, offs, td->reserved_block_code);
+ res = read_bbt(mtd, buf, td->pages[i],
+ this->chipsize >> this->bbt_erase_shift,
+ td, offs);
if (res)
return res;
offs += this->chipsize >> (this->bbt_erase_shift + 2);
}
} else {
- res = read_bbt (mtd, buf, td->pages[0], mtd->size >> this->bbt_erase_shift, bits, 0, td->reserved_block_code);
+ res = read_bbt(mtd, buf, td->pages[0],
+ mtd->size >> this->bbt_erase_shift, td, 0);
if (res)
return res;
}
return 0;
}
+/*
+ * BBT marker is in the first page, no OOB.
+ */
+static int scan_read_raw_data(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
+ struct nand_bbt_descr *td)
+{
+ size_t retlen;
+ size_t len;
+
+ len = td->len;
+ if (td->options & NAND_BBT_VERSION)
+ len++;
+
+ return mtd->read(mtd, offs, len, &retlen, buf);
+}
+
+/*
+ * Scan read raw data from flash
+ */
+static int scan_read_raw_oob(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
+ size_t len)
+{
+ struct mtd_oob_ops ops;
+ int res;
+
+ ops.mode = MTD_OOB_RAW;
+ ops.ooboffs = 0;
+ ops.ooblen = mtd->oobsize;
+
+
+ while (len > 0) {
+ if (len <= mtd->writesize) {
+ ops.oobbuf = buf + len;
+ ops.datbuf = buf;
+ ops.len = len;
+ return mtd->read_oob(mtd, offs, &ops);
+ } else {
+ ops.oobbuf = buf + mtd->writesize;
+ ops.datbuf = buf;
+ ops.len = mtd->writesize;
+ res = mtd->read_oob(mtd, offs, &ops);
+
+ if (res)
+ return res;
+ }
+
+ buf += mtd->oobsize + mtd->writesize;
+ len -= mtd->writesize;
+ }
+ return 0;
+}
+
+static int scan_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
+ size_t len, struct nand_bbt_descr *td)
+{
+ if (td->options & NAND_BBT_NO_OOB)
+ return scan_read_raw_data(mtd, buf, offs, td);
+ else
+ return scan_read_raw_oob(mtd, buf, offs, len);
+}
+
+/*
+ * 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);
+}
+
+static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td)
+{
+ u32 ver_offs = td->veroffs;
+
+ if (!(td->options & NAND_BBT_NO_OOB))
+ ver_offs += mtd->writesize;
+ return ver_offs;
+}
+
/**
* read_abs_bbts - [GENERIC] Read the bad block table(s) for all chips starting at a given page
* @mtd: MTD device structure
* 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, (loff_t)td->pages[0] << this->page_shift,
+ mtd->writesize, td);
+ td->version[0] = buf[bbt_get_ver_offs(mtd, td)];
+ 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, (loff_t)md->pages[0] << this->page_shift,
+ mtd->writesize, td);
+ md->version[0] = buf[bbt_get_ver_offs(mtd, md)];
+ 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_oob(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
* 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;
+
+ MTDDEBUG(MTD_DEBUG_LEVEL0, "Scanning device for bad blocks\n");
if (bd->options & NAND_BBT_SCANALLPAGES)
len = 1 << (this->bbt_erase_shift - this->page_shift);
- else {
- if (bd->options & NAND_BBT_SCAN2NDPAGE)
- len = 2;
- else
- len = 1;
+ else if (bd->options & NAND_BBT_SCAN2NDPAGE)
+ len = 2;
+ else
+ len = 1;
+
+ 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;
}
- scanlen = mtd->oobblock + mtd->oobsize;
- readlen = len * mtd->oobblock;
- ooblen = len * mtd->oobsize;
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;
numblocks += startblock;
- from = startblock << (this->bbt_erase_shift - 1);
+ from = (loff_t)startblock << (this->bbt_erase_shift - 1);
}
+ if (this->options & NAND_BBT_SCANLASTPAGE)
+ from += mtd->erasesize - (mtd->writesize * len);
+
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;
+
+ BUG_ON(bd->options & NAND_BBT_NO_OOB);
+
+ 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);
+ MTDDEBUG(MTD_DEBUG_LEVEL0,
+ "Bad eraseblock %d at 0x%012llx\n",
+ i >> 1, (unsigned long long)from);
+ mtd->ecc_stats.badblocks++;
}
+
i += 2;
from += (1 << this->bbt_erase_shift);
}
+ return 0;
}
/**
* 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 startblock, block, dir;
+ 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;
bbtblocks = mtd->size >> this->bbt_erase_shift;
}
- /* Number of bits for each erase block in the bbt */
- bits = td->options & NAND_BBT_NRBITS_MSK;
-
for (i = 0; i < chips; i++) {
/* Reset version information */
td->version[i] = 0;
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 = (loff_t)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, td);
+ 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];
+ offs = bbt_get_ver_offs(mtd, td);
+ td->version[i] = buf[offs];
}
break;
}
/* 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]);
+ MTDDEBUG(MTD_DEBUG_LEVEL0,
+ "Bad block table found at page %d, version 0x%02X\n",
+ td->pages[i], td->version[i]);
}
return 0;
}
*
* 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
*
* (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;
chip = chipsel;
}
} else {
- numblocks = (int) (mtd->size >> this->bbt_erase_shift);
+ numblocks = (int)(mtd->size >> this->bbt_erase_shift);
nrchips = 1;
}
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;
}
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 if (td->options & NAND_BBT_NO_OOB) {
+ ooboffs = 0;
+ offs = td->len;
+ /* the version byte */
+ if (td->options & NAND_BBT_VERSION)
+ offs++;
+ /* Calc length */
+ len = (size_t) (numblocks >> sft);
+ len += offs;
+ /* Make it page aligned ! */
+ len = ALIGN(len, mtd->writesize);
+ /* Preset the buffer with 0xff */
+ memset(buf, 0xff, len);
+ /* Pattern is located at the begin of first page */
+ memcpy(buf, td->pattern, td->len);
} else {
/* Calc length */
len = (size_t) (numblocks >> sft);
/* Make it page aligned ! */
- len = (len + (mtd->oobblock-1)) & ~(mtd->oobblock-1);
+ len = ALIGN(len, mtd->writesize);
/* 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 = 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,
+ td->options & NAND_BBT_NO_OOB ? NULL :
+ &buf[len]);
+ if (res < 0)
+ goto outerr;
+
+ printk(KERN_DEBUG "Bad block table written to 0x%012llx, version "
+ "0x%02X\n", (unsigned long long)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;
}
/**
* 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;
rd2 = NULL;
/* Per chip or per device ? */
chipsel = (td->options & NAND_BBT_PERCHIP) ? i : -1;
- /* Mirrored table avilable ? */
+ /* Mirrored table available ? */
if (md) {
if (td->pages[i] == -1 && md->pages[i] == -1) {
writeops = 0x03;
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);
+ if (!(this->options & NAND_CREATE_EMPTY_BBT))
+ 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;
}
* 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;
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)];
newval = oldval | (0x2 << (block & 0x06));
this->bbt[(block >> 3)] = newval;
if ((oldval != newval) && td->reserved_block_code)
- nand_update_bbt(mtd, block << (this->bbt_erase_shift - 1));
+ nand_update_bbt(mtd, (loff_t)block << (this->bbt_erase_shift - 1));
continue;
}
update = 0;
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
new ones have been marked, then we need to update the stored
bbts. This should only happen once. */
if (update && td->reserved_block_code)
- nand_update_bbt(mtd, (block - 2) << (this->bbt_erase_shift - 1));
+ nand_update_bbt(mtd, (loff_t)(block - 2) << (this->bbt_erase_shift - 1));
}
}
+/**
+ * verify_bbt_descr - verify the bad block description
+ * @mtd: MTD device structure
+ * @bd: the table to verify
+ *
+ * This functions performs a few sanity checks on the bad block description
+ * table.
+ */
+static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)
+{
+ struct nand_chip *this = mtd->priv;
+ u32 pattern_len;
+ u32 bits;
+ u32 table_size;
+
+ if (!bd)
+ return;
+
+ pattern_len = bd->len;
+ bits = bd->options & NAND_BBT_NRBITS_MSK;
+
+ BUG_ON((this->options & NAND_USE_FLASH_BBT_NO_OOB) &&
+ !(this->options & NAND_USE_FLASH_BBT));
+ BUG_ON(!bits);
+
+ if (bd->options & NAND_BBT_VERSION)
+ pattern_len++;
+
+ if (bd->options & NAND_BBT_NO_OOB) {
+ BUG_ON(!(this->options & NAND_USE_FLASH_BBT));
+ BUG_ON(!(this->options & NAND_USE_FLASH_BBT_NO_OOB));
+ BUG_ON(bd->offs);
+ if (bd->options & NAND_BBT_VERSION)
+ BUG_ON(bd->veroffs != bd->len);
+ BUG_ON(bd->options & NAND_BBT_SAVECONTENT);
+ }
+
+ if (bd->options & NAND_BBT_PERCHIP)
+ table_size = this->chipsize >> this->bbt_erase_shift;
+ else
+ table_size = mtd->size >> this->bbt_erase_shift;
+ table_size >>= 3;
+ table_size *= bits;
+ if (bd->options & NAND_BBT_NO_OOB)
+ table_size += pattern_len;
+ BUG_ON(table_size > (1 << this->bbt_erase_shift));
+}
+
/**
* nand_scan_bbt - [NAND Interface] scan, find, read and maybe create bad block table(s)
* @mtd: MTD device structure
* 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;
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;
+ }
+ verify_bbt_descr(mtd, td);
+ verify_bbt_descr(mtd, md);
/* 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
*
* 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;
if (!this->bbt || !td)
return -EINVAL;
- len = mtd->size >> (this->bbt_erase_shift + 2);
/* 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;
}
/* 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;
/* 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,
- .offs = 5,
- .len = 1,
- .pattern = scan_ff_pattern
-};
-
-static struct nand_bbt_descr largepage_memorybased = {
- .options = 0,
- .offs = 0,
- .len = 2,
- .pattern = scan_ff_pattern
-};
-
-static struct nand_bbt_descr smallpage_flashbased = {
- .options = NAND_BBT_SCANEMPTY | NAND_BBT_SCANALLPAGES,
- .offs = 5,
- .len = 1,
- .pattern = scan_ff_pattern
-};
-
-static struct nand_bbt_descr largepage_flashbased = {
- .options = NAND_BBT_SCANEMPTY | NAND_BBT_SCANALLPAGES,
- .offs = 0,
- .len = 2,
- .pattern = scan_ff_pattern
-};
-
static uint8_t scan_agand_pattern[] = { 0x1C, 0x71, 0xC7, 0x1C, 0x71, 0xC7 };
static struct nand_bbt_descr agand_flashbased = {
.pattern = mirror_pattern
};
+static struct nand_bbt_descr bbt_main_no_bbt_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP
+ | NAND_BBT_NO_OOB,
+ .len = 4,
+ .veroffs = 4,
+ .maxblocks = 4,
+ .pattern = bbt_pattern
+};
+
+static struct nand_bbt_descr bbt_mirror_no_bbt_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP
+ | NAND_BBT_NO_OOB,
+ .len = 4,
+ .veroffs = 4,
+ .maxblocks = 4,
+ .pattern = mirror_pattern
+};
+
+#define BBT_SCAN_OPTIONS (NAND_BBT_SCANLASTPAGE | NAND_BBT_SCAN2NDPAGE | \
+ NAND_BBT_SCANBYTE1AND6)
+/**
+ * nand_create_default_bbt_descr - [Internal] Creates a BBT descriptor structure
+ * @this: NAND chip to create descriptor for
+ *
+ * This function allocates and initializes a nand_bbt_descr for BBM detection
+ * based on the properties of "this". The new descriptor is stored in
+ * this->badblock_pattern. Thus, this->badblock_pattern should be NULL when
+ * passed to this function.
+ *
+ */
+static int nand_create_default_bbt_descr(struct nand_chip *this)
+{
+ struct nand_bbt_descr *bd;
+ if (this->badblock_pattern) {
+ printk(KERN_WARNING "BBT descr already allocated; not replacing.\n");
+ return -EINVAL;
+ }
+ bd = kzalloc(sizeof(*bd), GFP_KERNEL);
+ if (!bd) {
+ printk(KERN_ERR "nand_create_default_bbt_descr: Out of memory\n");
+ return -ENOMEM;
+ }
+ bd->options = this->options & BBT_SCAN_OPTIONS;
+ bd->offs = this->badblockpos;
+ bd->len = (this->options & NAND_BUSWIDTH_16) ? 2 : 1;
+ bd->pattern = scan_ff_pattern;
+ bd->options |= NAND_BBT_DYNAMICSTRUCT;
+ this->badblock_pattern = bd;
+ return 0;
+}
+
/**
* nand_default_bbt - [NAND Interface] Select a default bad block table for the device
* @mtd: MTD device structure
* 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;
* 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) {
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 */
if (!this->bbt_td) {
- this->bbt_td = &bbt_main_descr;
- this->bbt_md = &bbt_mirror_descr;
- }
- if (!this->badblock_pattern) {
- this->badblock_pattern = (mtd->oobblock > 512) ?
- &largepage_flashbased : &smallpage_flashbased;
+ if (this->options & NAND_USE_FLASH_BBT_NO_OOB) {
+ this->bbt_td = &bbt_main_no_bbt_descr;
+ this->bbt_md = &bbt_mirror_no_bbt_descr;
+ } else {
+ this->bbt_td = &bbt_main_descr;
+ this->bbt_md = &bbt_mirror_descr;
+ }
}
} else {
this->bbt_td = NULL;
this->bbt_md = NULL;
- if (!this->badblock_pattern) {
- this->badblock_pattern = (mtd->oobblock > 512) ?
- &largepage_memorybased : &smallpage_memorybased;
- }
}
- return nand_scan_bbt (mtd, this->badblock_pattern);
+
+ if (!this->badblock_pattern)
+ nand_create_default_bbt_descr(this);
+
+ return nand_scan_bbt(mtd, this->badblock_pattern);
}
/**
* @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;
- DEBUG (MTD_DEBUG_LEVEL2, "nand_isbad_bbt(): bbt info for offs 0x%08x: (block %d) 0x%02x\n",
- (unsigned int)offs, res, block >> 1);
+ MTDDEBUG(MTD_DEBUG_LEVEL2, "nand_isbad_bbt(): bbt info for offs 0x%08x: (block %d) 0x%02x\n",
+ (unsigned int)offs, block >> 1, res);
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;
}
-
-#endif
projects / karo-tx-uboot.git / blobdiff