diff options
| author |   Kyungmin Park <kyungmin.park@samsung.com> | 2011-06-22 14:16:49 +0900 |
|---|---|---|
| committer |   Artem Bityutskiy <artem.bityutskiy@intel.com> | 2011-09-11 15:02:13 +0300 |
| commit | e1c10243df92822954b9b5e04d12dd2f23a39652 (patch) | |
| tree | d2b263c3da7174396d336641f4545acc8d31be22 | |
| parent | mtd: socrates_nand.c: use mtd_device_parse_register (diff) | |
| download | linux-dev-e1c10243df92822954b9b5e04d12dd2f23a39652.tar.xz linux-dev-e1c10243df92822954b9b5e04d12dd2f23a39652.zip | |
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 <kyungmin.park@samsung.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
| -rw-r--r-- | drivers/mtd/onenand/onenand_base.c | 15 | ||||
| -rw-r--r-- | include/linux/mtd/onenand.h | 4 |
2 files changed, 19 insertions, 0 deletions
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; diff --git a/include/linux/mtd/onenand.h b/include/linux/mtd/onenand.h index 52b6f187bf49..4596503c9da9 100644 --- a/include/linux/mtd/onenand.h +++ b/include/linux/mtd/onenand.h @@ -184,6 +184,9 @@ struct onenand_chip { #define ONENAND_IS_CACHE_PROGRAM(this) \ (this->options & ONENAND_HAS_CACHE_PROGRAM) +#define ONENAND_IS_NOP_1(this) \ + (this->options & ONENAND_HAS_NOP_1) + /* Check byte access in OneNAND */ #define ONENAND_CHECK_BYTE_ACCESS(addr) (addr & 0x1) @@ -195,6 +198,7 @@ struct onenand_chip { #define ONENAND_HAS_2PLANE (0x0004) #define ONENAND_HAS_4KB_PAGE (0x0008) #define ONENAND_HAS_CACHE_PROGRAM (0x0010) +#define ONENAND_HAS_NOP_1 (0x0020) #define ONENAND_SKIP_UNLOCK_CHECK (0x0100) #define ONENAND_PAGEBUF_ALLOC (0x1000) #define ONENAND_OOBBUF_ALLOC (0x2000) |