[PATCH] mtd: onenand: add ecclayout and subpage_sft for none-flex 4kb page onenand
Roman Tereshonkov
roman.tereshonkov at nokia.com
Mon Apr 4 07:07:04 EDT 2011
So as the ecclayout and suppage size for 4kb page
Flex- and none-Flex OneNAND are different
the new values for none-Flex 4kb page OneNAND memory are added.
The introduced ecclayout and suppage size are based on specification
4Gb M-die OneNAND Flash (KFM4G16Q4M, KFN8G16Q4M). Rev. 1.3, Apr. 2010
Signed-off-by: Roman Tereshonkov <roman.tereshonkov at nokia.com>
---
drivers/mtd/onenand/onenand_base.c | 33 +++++++++++++++++++++++++++++++--
1 files changed, 31 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 56a8b20..9b53feb 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -87,6 +87,30 @@ static struct nand_ecclayout onenand_oob_128 = {
};
/**
+ * onenand_oob_128 - oob info for OneNAND with 4KB page
+ * and using reserved bytes as free bytes instead of
+ * free bytes that are managed by ECC.
+ * For now, we expose only 64 out of 72 ecc bytes
+ */
+static struct nand_ecclayout onenand_oob_128_none_flex = {
+ .eccbytes = 64,
+ .eccpos = {
+ 7, 8, 9, 10, 11, 12, 13, 14, 15,
+ 23, 24, 25, 26, 27, 28, 29, 30, 31,
+ 39, 40, 41, 42, 43, 44, 45, 46, 47,
+ 55, 56, 57, 58, 59, 60, 61, 62, 63,
+ 71, 72, 73, 74, 75, 76, 77, 78, 79,
+ 87, 88, 89, 90, 91, 92, 93, 94, 95,
+ 103, 104, 105, 106, 107, 108, 109, 110, 111,
+ 119
+ },
+ .oobfree = {
+ {5, 2}, {21, 2}, {37, 2}, {53, 2},
+ {69, 2}, {85, 2}, {101, 2}, {117, 2}
+ }
+};
+
+/**
* onenand_oob_64 - oob info for large (2KB) page
*/
static struct nand_ecclayout onenand_oob_64 = {
@@ -4018,8 +4042,13 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
*/
switch (mtd->oobsize) {
case 128:
- this->ecclayout = &onenand_oob_128;
- mtd->subpage_sft = 0;
+ if (FLEXONENAND(this)) {
+ this->ecclayout = &onenand_oob_128;
+ mtd->subpage_sft = 0;
+ } else {
+ this->ecclayout = &onenand_oob_128_none_flex;
+ mtd->subpage_sft = 2;
+ }
break;
case 64:
this->ecclayout = &onenand_oob_64;
--
1.7.0.4
More information about the linux-mtd
mailing list