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[MTD] Support for protection register support on Intel FLASH chips

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This enables support for reading, writing and locking so called
"Protection Registers" present on some flash chips.
A subset of them are pre-programmed at the factory with a
unique set of values. The rest is user-programmable.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Nicolas Pitre
2005-02-08 17:11:19 +00:00
committed by Thomas Gleixner
parent 67d9e95c39
commit f77814dd57
8 changed files with 369 additions and 127 deletions
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10
include/linux/mtd/mtd.h
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@ -1,5 +1,5 @@
/*
* $Id: mtd.h,v 1.56 2004/08/09 18:46:04 dmarlin Exp $
* $Id: mtd.h,v 1.57 2005/02/08 17:11:15 nico Exp $
*
* Copyright (C) 1999-2003 David Woodhouse <dwmw2@infradead.org> et al.
*
@ -113,12 +113,12 @@ struct mtd_info {
* flash devices. The user data is one time programmable but the
* factory data is read only.
*/
int (*read_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
int (*get_fact_prot_info) (struct mtd_info *mtd, struct otp_info *buf, size_t len);
int (*read_fact_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
/* This function is not yet implemented */
int (*get_user_prot_info) (struct mtd_info *mtd, struct otp_info *buf, size_t len);
int (*read_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
int (*write_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
int (*lock_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len);
/* kvec-based read/write methods. We need these especially for NAND flash,
with its limited number of write cycles per erase.