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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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15
include/linux/mtd/map.h
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@ -1,6 +1,6 @@
/* Overhauled routines for dealing with different mmap regions of flash */
/* $Id: map.h,v 1.46 2005/01/05 17:09:44 dwmw2 Exp $ */
/* $Id: map.h,v 1.47 2005/02/08 17:11:15 nico Exp $ */
#ifndef __LINUX_MTD_MAP_H__
#define __LINUX_MTD_MAP_H__
@ -263,6 +263,17 @@ static inline map_word map_word_and(struct map_info *map, map_word val1, map_wor
return r;
}
static inline map_word map_word_clr(struct map_info *map, map_word val1, map_word val2)
{
map_word r;
int i;
for (i=0; i<map_words(map); i++) {
r.x[i] = val1.x[i] & ~val2.x[i];
}
return r;
}
static inline map_word map_word_or(struct map_info *map, map_word val1, map_word val2)
{
map_word r;
@ -273,6 +284,7 @@ static inline map_word map_word_or(struct map_info *map, map_word val1, map_word
}
return r;
}
#define map_word_andequal(m, a, b, z) map_word_equal(m, z, map_word_and(m, a, b))
static inline int map_word_bitsset(struct map_info *map, map_word val1, map_word val2)
@ -338,6 +350,7 @@ static inline map_word map_word_ff(struct map_info *map)
}
return r;
}
static inline map_word inline_map_read(struct map_info *map, unsigned long ofs)
{
map_word r;