aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/mtd/nand/nand_bbt.c
diff options
context:
space:
mode:
authorThomas Gleixner <tglx@cruncher.tec.linutronix.de>2006-05-30 00:37:34 +0200
committerThomas Gleixner <tglx@cruncher.tec.linutronix.de>2006-05-30 00:37:34 +0200
commitf1a28c02843efcfcc41982149880bac3ac180234 (patch)
treeb15ca1a140e463ef3cde6b9a8591e7be172ee1f1 /drivers/mtd/nand/nand_bbt.c
parent[MTD] NAND Signal that a bitflip was corrected by ECC (diff)
downloadlinux-dev-f1a28c02843efcfcc41982149880bac3ac180234.tar.xz
linux-dev-f1a28c02843efcfcc41982149880bac3ac180234.zip
[MTD] NAND Expose the new raw mode function and status info to userspace
The raw read/write access to NAND (without ECC) has been changed in the NAND rework. Expose the new way - setting the file mode via ioctl - to userspace. Also allow to read out the ecc statistics information so userspace tools can see that bitflips happened and whether errors where correctable or not. Also expose the number of bad blocks for the partition, so nandwrite can check if the data fits into the parition before writing to it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/mtd/nand/nand_bbt.c')
-rw-r--r--drivers/mtd/nand/nand_bbt.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
index 480c3cbf9bf9..a612c4ea8194 100644
--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -176,6 +176,7 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
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
@@ -187,6 +188,7 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
this->bbt[offs + (act >> 3)] |= 0x3 << (act & 0x06);
else
this->bbt[offs + (act >> 3)] |= 0x1 << (act & 0x06);
+ mtd->ecc_stats.badblocks++;
}
}
totlen -= len;
@@ -431,6 +433,7 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf,
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;