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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
parent9a1fcdfd4bee27c418424cac47abf7c049541297 (diff)
[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')
-rw-r--r--drivers/mtd/nand/nand_base.c26
-rw-r--r--drivers/mtd/nand/nand_bbt.c3
2 files changed, 19 insertions, 10 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 7a3a4490771..ea6d2c334ae 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -347,7 +347,7 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
{
struct nand_chip *chip = mtd->priv;
uint8_t buf[2] = { 0, 0 };
- int block;
+ int block, ret;
/* Get block number */
block = ((int)ofs) >> chip->bbt_erase_shift;
@@ -356,16 +356,22 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
/* Do we have a flash based bad block table ? */
if (chip->options & NAND_USE_FLASH_BBT)
- return nand_update_bbt(mtd, ofs);
-
- /* We write two bytes, so we dont have to mess with 16 bit access */
- ofs += mtd->oobsize;
- chip->ops.len = 2;
- chip->ops.datbuf = NULL;
- chip->ops.oobbuf = buf;
- chip->ops.ooboffs = chip->badblockpos & ~0x01;
+ ret = nand_update_bbt(mtd, ofs);
+ else {
+ /* We write two bytes, so we dont have to mess with 16 bit
+ * access
+ */
+ ofs += mtd->oobsize;
+ chip->ops.len = 2;
+ chip->ops.datbuf = NULL;
+ chip->ops.oobbuf = buf;
+ chip->ops.ooboffs = chip->badblockpos & ~0x01;
- return nand_do_write_oob(mtd, ofs, &chip->ops);
+ ret = nand_do_write_oob(mtd, ofs, &chip->ops);
+ }
+ if (!ret)
+ mtd->ecc_stats.badblocks++;
+ return ret;
}
/**
diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
index 480c3cbf9bf..a612c4ea819 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;