From e1c10243df92822954b9b5e04d12dd2f23a39652 Mon Sep 17 00:00:00 2001 From: Kyungmin Park Date: Wed, 22 Jun 2011 14:16:49 +0900 Subject: mtd: OneNAND: Detect the correct NOP when 4KiB pagesize There are two different 4KiB pagesize chips KFM4G16Q4M series have NOP 4 with version ID 0x0131 But KFM4G16Q5M has NOP 1 with versoin ID 0x013e Note that Q5M means that it has NOP 1. Signed-off-by: Kyungmin Park Signed-off-by: Artem Bityutskiy --- drivers/mtd/onenand/onenand_base.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'drivers/mtd/onenand') diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index ac9e959802a7..51800a7ef7f8 100644 --- a/drivers/mtd/onenand/onenand_base.c +++ b/drivers/mtd/onenand/onenand_base.c @@ -3429,6 +3429,19 @@ static void onenand_check_features(struct mtd_info *mtd) else if (numbufs == 1) { this->options |= ONENAND_HAS_4KB_PAGE; this->options |= ONENAND_HAS_CACHE_PROGRAM; + /* + * There are two different 4KiB pagesize chips + * and no way to detect it by H/W config values. + * + * To detect the correct NOP for each chips, + * It should check the version ID as workaround. + * + * Now it has as following + * KFM4G16Q4M has NOP 4 with version ID 0x0131 + * KFM4G16Q5M has NOP 1 with versoin ID 0x013e + */ + if ((this->version_id & 0xf) == 0xe) + this->options |= ONENAND_HAS_NOP_1; } case ONENAND_DEVICE_DENSITY_2Gb: @@ -4054,6 +4067,8 @@ int onenand_scan(struct mtd_info *mtd, int maxchips) this->ecclayout = &onenand_oob_128; mtd->subpage_sft = 2; } + if (ONENAND_IS_NOP_1(this)) + mtd->subpage_sft = 0; break; case 64: this->ecclayout = &onenand_oob_64; -- cgit v1.2.3