lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

mtd: mxc_nand: fix 2KiB pagesize NAND on i.MX27

Browse Source 
This patch allows i.MX27 to support 2KiB pagesize NAND flash.
We are using a 1.8V NAND flash which datasheet (unfortunately only
available under NDA) says :
Page size: x8: 2,112 bytes (2,048 + 64 bytes).
Without this patch, all sectors are marked as bad eraseblock.

Signed-off-by: Eric Benard <ebenard@eukrea.com>
Acked-by : Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Eric Benard
2009-06-29 13:58:01 +02:00
committed by David Woodhouse
parent 64da392ab0
commit 71b7d0d90d
1 changed files with 15 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/mtd/nand/mxc_nand.c
View File

@@ -857,6 +857,17 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
} }
} }
/* Define some generic bad / good block scan pattern which are used
* 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 = NAND_BBT_SCAN2NDPAGE,
.offs = 5,
.len = 1,
.pattern = scan_ff_pattern
};
static int __init mxcnd_probe(struct platform_device *pdev) static int __init mxcnd_probe(struct platform_device *pdev)
{ {
struct nand_chip *this; struct nand_chip *this;
@@ -973,7 +984,10 @@ static int __init mxcnd_probe(struct platform_device *pdev)
goto escan; goto escan;
} }
host->pagesize_2k = (mtd->writesize == 2048) ? 1 : 0; if (mtd->writesize == 2048) {
host->pagesize_2k = 1;
this->badblock_pattern = &smallpage_memorybased;
}
if (this->ecc.mode == NAND_ECC_HW) { if (this->ecc.mode == NAND_ECC_HW) {
switch (mtd->oobsize) { switch (mtd->oobsize) {