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
this->bbt[offs + (act >> 3)] |= 0x3 << (act & 0x06);
else
this->bbt[offs + (act >> 3)] |= 0x1 << (act & 0x06);
+ mtd->ecc_stats.badblocks++;
}
}
totlen -= len;
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
* 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->writesize, mtd->oobsize);
+ 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]);
+ 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->writesize, mtd->oobsize);
+ 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]);
+ 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
* Create a bad block table by scanning the device
* for the given good/bad block identify pattern
*/
-static int 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_SCANEMPTY)) {
/* We need only read few bytes from the OOB area */
- scanlen = ooblen = 0;
+ scanlen = 0;
readlen = bd->len;
} else {
/* Full page content should be read */
scanlen = mtd->writesize + mtd->oobsize;
readlen = len * mtd->writesize;
- 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;
for (i = startblock; i < numblocks;) {
int ret;
- if (bd->options & NAND_BBT_SCANEMPTY)
- if ((ret = nand_read_raw(mtd, buf, from, readlen, ooblen)))
- return ret;
-
- for (j = 0; j < len; j++) {
- if (!(bd->options & NAND_BBT_SCANEMPTY)) {
- size_t retlen;
-
- /* 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->writesize, mtd->oobsize, &retlen, buf);
- if (ret)
- return ret;
-
- if (check_short_pattern(buf, bd)) {
- this->bbt[i >> 3] |= 0x03 << (i & 0x6);
- printk(KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
- i >> 1, (unsigned int)from);
- break;
- }
- } else {
- 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);
- break;
- }
- }
+ 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);
}
int bits, 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) {
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->writesize, mtd->oobsize);
+ scan_read_raw(mtd, buf, offs, mtd->writesize);
if (!check_pattern(buf, scanlen, mtd->writesize, td)) {
- td->pages[i] = actblock << (this->bbt_erase_shift - this->page_shift);
+ td->pages[i] = actblock << blocktopage;
if (td->options & NAND_BBT_VERSION) {
td->version[i] = buf[mtd->writesize + td->veroffs];
}
int nrchips, bbtoffs, pageoffs, ooboffs;
uint8_t msk[4];
uint8_t rcode = td->reserved_block_code;
- size_t retlen, len = 0, ooblen;
+ 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;
"bad block table\n");
}
/* Read oob data */
- ooblen = (len >> this->page_shift) * mtd->oobsize;
- res = mtd->read_oob(mtd, to + mtd->writesize, ooblen,
- &retlen, &buf[len]);
- if (res < 0 || retlen != ooblen)
+ 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 */
if (res < 0)
goto outerr;
- res = nand_write_raw(mtd, to, len, &retlen, buf, &buf[len]);
+ res = scan_write_bbt(mtd, to, len, buf, &buf[len]);
if (res < 0)
goto outerr;
struct nand_chip *this = mtd->priv;
bd->options &= ~NAND_BBT_SCANEMPTY;
- return create_bbt(mtd, this->data_buf, bd, -1);
+ return create_bbt(mtd, this->buffers->databuf, bd, -1);
}
/**
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");
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
projects / linux-2.6-omap-h63xx.git / blobdiff