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OneNAND: One-Time Programmable (OTP) support

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One Block of the NAND Flash Array memory is reserved as
a One-Time Programmable Block memory area.
Also, 1st Block of NAND Flash Array can be used as OTP.

The OTP block can be read, programmed and locked using the same
operations as any other NAND Flash Array memory block.
OTP block cannot be erased.

OTP block is fully-guaranteed to be a valid block.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
Kyungmin Park
2006-05-12 17:03:07 +03:00
committed by Jarkko Lavinen
parent 3cecf69ecd
commit 493c646077
5 changed files with 335 additions and 4 deletions
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8
include/linux/mtd/onenand_regs.h
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@@ -112,6 +112,7 @@
#define ONENAND_CMD_LOCK_TIGHT (0x2C)
#define ONENAND_CMD_ERASE (0x94)
#define ONENAND_CMD_RESET (0xF0)
#define ONENAND_CMD_OTP_ACCESS (0x65)
#define ONENAND_CMD_READID (0x90)
/* NOTE: Those are not *REAL* commands */
@@ -152,6 +153,8 @@
#define ONENAND_CTRL_ERASE (1 << 11)
#define ONENAND_CTRL_ERROR (1 << 10)
#define ONENAND_CTRL_RSTB (1 << 7)
#define ONENAND_CTRL_OTP_L (1 << 6)
#define ONENAND_CTRL_OTP_BL (1 << 5)
/*
* Interrupt Status Register F241h (R)
@@ -177,4 +180,9 @@
#define ONENAND_ECC_2BIT (1 << 1)
#define ONENAND_ECC_2BIT_ALL (0xAAAA)
/*
* One-Time Programmable (OTP)
*/
#define ONENAND_OTP_LOCK_OFFSET (14)
#endif /* __ONENAND_REG_H */