@@ -76,6 +76,7 @@ extern const struct nand_manufacturer_ops toshiba_nand_manuf_ops;
/* Core functions */
const struct nand_manufacturer *nand_get_manufacturer(u8 id);
+int nand_bbm_get_next_page(struct nand_chip *chip, int page);
int nand_markbad_bbm(struct nand_chip *chip, loff_t ofs);
int nand_erase_nand(struct nand_chip *chip, struct erase_info *instr,
int allowbbt);
@@ -282,6 +282,31 @@ static void nand_release_device(struct nand_chip *chip)
mutex_unlock(&chip->lock);
}
+/**
+ * nand_bbm_get_next_page - Get the next page for bad block markers
+ * @chip: NAND chip object
+ * @index: Current page, only pages beyond this will be considered
+ *
+ * Returns an integer that corresponds to the page offset within a block, for
+ * a page that is used to store bad block markers. If no more pages are
+ * available, -1 is returned.
+ */
+int nand_bbm_get_next_page(struct nand_chip *chip, int page)
+{
+ struct mtd_info *mtd = nand_to_mtd(chip);
+ int last_page = ((mtd->erasesize - mtd->writesize) >>
+ chip->page_shift) & chip->pagemask;
+
+ if (page < 0 && chip->options & NAND_BBM_FIRSTPAGE)
+ return 0;
+ else if (page < 1 && chip->options & NAND_BBM_SECONDPAGE)
+ return 1;
+ else if (page < last_page && chip->options & NAND_BBM_LASTPAGE)
+ return last_page;
+
+ return -1;
+}
+
/**
* nand_block_bad - [DEFAULT] Read bad block marker from the chip
* @chip: NAND chip object
@@ -291,19 +316,14 @@ static void nand_release_device(struct nand_chip *chip)
*/
static int nand_block_bad(struct nand_chip *chip, loff_t ofs)
{
- struct mtd_info *mtd = nand_to_mtd(chip);
- int page, page_end, res;
+ int page_offset;
+ int res, first_page = (int)(ofs >> chip->page_shift) & chip->pagemask;
u8 bad;
- if (chip->options & NAND_BBM_LASTPAGE)
- ofs += mtd->erasesize - mtd->writesize;
+ page_offset = nand_bbm_get_next_page(chip, -1);
- page = (int)(ofs >> chip->page_shift) & chip->pagemask;
- page_end = page + (((chip->options & NAND_BBM_FIRSTPAGE) &&
- (chip->options & NAND_BBM_SECONDPAGE)) ? 2 : 1);
-
- for (; page < page_end; page++) {
- res = chip->ecc.read_oob(chip, page);
+ while (page_offset != -1) {
+ res = chip->ecc.read_oob(chip, first_page + page_offset);
if (res < 0)
return res;
@@ -315,6 +335,8 @@ static int nand_block_bad(struct nand_chip *chip, loff_t ofs)
res = hweight8(bad) < chip->badblockbits;
if (res)
return res;
+
+ page_offset = nand_bbm_get_next_page(chip, page_offset);
}
return 0;
@@ -494,7 +516,7 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
struct mtd_info *mtd = nand_to_mtd(chip);
struct mtd_oob_ops ops;
uint8_t buf[2] = { 0, 0 };
- int ret = 0, res, i = 0;
+ int ret = 0, res, page_offset;
memset(&ops, 0, sizeof(ops));
ops.oobbuf = buf;
@@ -507,18 +529,18 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
}
ops.mode = MTD_OPS_PLACE_OOB;
- /* Write to first/last page(s) if necessary */
- if (chip->options & NAND_BBM_LASTPAGE)
- ofs += mtd->erasesize - mtd->writesize;
- do {
- res = nand_do_write_oob(chip, ofs, &ops);
+ page_offset = nand_bbm_get_next_page(chip, -1);
+
+ while (page_offset != -1) {
+ res = nand_do_write_oob(chip,
+ ofs + page_offset * mtd->writesize,
+ &ops);
+
if (!ret)
ret = res;
- i++;
- ofs += mtd->writesize;
- } while ((chip->options & NAND_BBM_FIRSTPAGE) &&
- (chip->options & NAND_BBM_SECONDPAGE) && i < 2);
+ page_offset = nand_bbm_get_next_page(chip, page_offset);
+ }
return ret;
}
@@ -416,11 +416,12 @@ static void read_abs_bbts(struct nand_chip *this, uint8_t *buf,
/* Scan a given block partially */
static int scan_block_fast(struct nand_chip *this, struct nand_bbt_descr *bd,
- loff_t offs, uint8_t *buf, int numpages)
+ loff_t offs, uint8_t *buf)
{
struct mtd_info *mtd = nand_to_mtd(this);
+
struct mtd_oob_ops ops;
- int j, ret;
+ int ret, page_offset;
ops.ooblen = mtd->oobsize;
ops.oobbuf = buf;
@@ -428,12 +429,15 @@ static int scan_block_fast(struct nand_chip *this, struct nand_bbt_descr *bd,
ops.datbuf = NULL;
ops.mode = MTD_OPS_PLACE_OOB;
- for (j = 0; j < numpages; j++) {
+ page_offset = nand_bbm_get_next_page(this, -1);
+
+ while (page_offset != -1) {
/*
* 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);
+ ret = mtd_read_oob(mtd, offs + page_offset * mtd->writesize,
+ &ops);
/* Ignore ECC errors when checking for BBM */
if (ret && !mtd_is_bitflip_or_eccerr(ret))
return ret;
@@ -441,8 +445,9 @@ static int scan_block_fast(struct nand_chip *this, struct nand_bbt_descr *bd,
if (check_short_pattern(buf, bd))
return 1;
- offs += mtd->writesize;
+ page_offset = nand_bbm_get_next_page(this, page_offset);
}
+
return 0;
}
@@ -462,18 +467,11 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
{
u64 targetsize = nanddev_target_size(&this->base);
struct mtd_info *mtd = nand_to_mtd(this);
- int i, numblocks, numpages;
- int startblock;
+ int i, numblocks, startblock;
loff_t from;
pr_info("Scanning device for bad blocks\n");
- if ((this->options & NAND_BBM_FIRSTPAGE) &&
- (this->options & NAND_BBM_SECONDPAGE))
- numpages = 2;
- else
- numpages = 1;
-
if (chip == -1) {
numblocks = mtd->size >> this->bbt_erase_shift;
startblock = 0;
@@ -490,15 +488,12 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
from = (loff_t)startblock << this->bbt_erase_shift;
}
- if (this->options & NAND_BBM_LASTPAGE)
- from += mtd->erasesize - (mtd->writesize * numpages);
-
for (i = startblock; i < numblocks; i++) {
int ret;
BUG_ON(bd->options & NAND_BBT_NO_OOB);
- ret = scan_block_fast(this, bd, from, buf, numpages);
+ ret = scan_block_fast(this, bd, from, buf);
if (ret < 0)
return ret;