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mtd: OneNAND: Detect the correct NOP when 4KiB pagesize

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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>
This commit is contained in:
Kyungmin Park 2011-06-22 14:16:49 +09:00 committed by Artem Bityutskiy
parent b2a5a4878e
commit e1c10243df
2 changed files with 19 additions and 0 deletions
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15
drivers/mtd/onenand/onenand_base.c
View File

@ -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;

4
include/linux/mtd/onenand.h
View File

@ -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)