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authorEric Benard <ebenard@eukrea.com>2009-06-29 07:58:01 -0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-09-19 16:11:51 -0400
commit71b7d0d90d536ae4e70929cc59a1a9f6ba457c6c (patch)
treebd2b653811d1971f8cdd00daab2f1a1beb58488c /drivers
parent64da392ab08a88ad83f4c3f60283711ee090c9ef (diff)
mtd: mxc_nand: fix 2KiB pagesize NAND on i.MX27
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mtd/nand/mxc_nand.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 76beea40d2cf..65b26d5a5c0d 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -857,6 +857,17 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
857 } 857 }
858} 858}
859 859
860/* Define some generic bad / good block scan pattern which are used
861 * while scanning a device for factory marked good / bad blocks. */
862static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
863
864static struct nand_bbt_descr smallpage_memorybased = {
865 .options = NAND_BBT_SCAN2NDPAGE,
866 .offs = 5,
867 .len = 1,
868 .pattern = scan_ff_pattern
869};
870
860static int __init mxcnd_probe(struct platform_device *pdev) 871static int __init mxcnd_probe(struct platform_device *pdev)
861{ 872{
862 struct nand_chip *this; 873 struct nand_chip *this;
@@ -973,7 +984,10 @@ static int __init mxcnd_probe(struct platform_device *pdev)
973 goto escan; 984 goto escan;
974 } 985 }
975 986
976 host->pagesize_2k = (mtd->writesize == 2048) ? 1 : 0; 987 if (mtd->writesize == 2048) {
988 host->pagesize_2k = 1;
989 this->badblock_pattern = &smallpage_memorybased;
990 }
977 991
978 if (this->ecc.mode == NAND_ECC_HW) { 992 if (this->ecc.mode == NAND_ECC_HW) {
979 switch (mtd->oobsize) { 993 switch (mtd->oobsize) {