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mtd: OneNAND: multiblock erase support

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Add support for multiblock erase command. OneNANDs (excluding Flex-OneNAND)
are capable of simultaneous erase of up to 64 eraseblocks which is much faster.

This changes the erase requests for regions covering multiple eraseblocks
to be performed using multiblock erase.

Signed-off-by: Mika Korhonen <ext-mika.2.korhonen@nokia.com>
Reviewed-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Mika Korhonen
2009-10-23 07:50:43 +02:00
committed by David Woodhouse
parent 73885aeaca
commit 72073027ee
4 changed files with 194 additions and 7 deletions
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4
include/linux/mtd/flashchip.h
View File

@@ -41,9 +41,11 @@ typedef enum {
/* These 2 come from nand_state_t, which has been unified here */
FL_READING,
FL_CACHEDPRG,
/* These 2 come from onenand_state_t, which has been unified here */
/* These 4 come from onenand_state_t, which has been unified here */
FL_RESETING,
FL_OTPING,
FL_PREPARING_ERASE,
FL_VERIFYING_ERASE,
FL_UNKNOWN
} flstate_t;

2
include/linux/mtd/onenand_regs.h
View File

@@ -131,6 +131,8 @@
#define ONENAND_CMD_LOCK_TIGHT (0x2C)
#define ONENAND_CMD_UNLOCK_ALL (0x27)
#define ONENAND_CMD_ERASE (0x94)
#define ONENAND_CMD_MULTIBLOCK_ERASE (0x95)
#define ONENAND_CMD_ERASE_VERIFY (0x71)
#define ONENAND_CMD_RESET (0xF0)
#define ONENAND_CMD_OTP_ACCESS (0x65)
#define ONENAND_CMD_READID (0x90)