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

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>

5 files changed, 30 insertions, 10 deletions

diff --git a/include/linux/mtd/cfi.h b/include/linux/mtd/cfi.h
index d87dc3fbd4ba..76255474a27c 100644
--- a/include/linux/mtd/cfi.h
+++ b/include/linux/mtd/cfi.h
@@ -1,7 +1,7 @@
 
 /* Common Flash Interface structures 
  * See http://support.intel.com/design/flash/technote/index.htm
- * $Id: cfi.h,v 1.51 2005/02/05 02:06:16 nico Exp $
+ * $Id: cfi.h,v 1.52 2005/02/08 17:11:15 nico Exp $
  */
 
 #ifndef __MTD_CFI_H__
@@ -252,7 +252,7 @@ static inline uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs, int interleave, int
  * It looks too long to be inline, but in the common case it should almost all
  * get optimised away. 
  */
-static inline map_word cfi_build_cmd(u_char cmd, struct map_info *map, struct cfi_private *cfi)
+static inline map_word cfi_build_cmd(u_long cmd, struct map_info *map, struct cfi_private *cfi)
 {
         map_word val = { {0} };
         int wordwidth, words_per_bus, chip_mode, chips_per_word;
diff --git a/include/linux/mtd/flashchip.h b/include/linux/mtd/flashchip.h
index c66ba812bf90..e778a1ab23c4 100644
--- a/include/linux/mtd/flashchip.h
+++ b/include/linux/mtd/flashchip.h
@@ -6,7 +6,7 @@
  *
  * (C) 2000 Red Hat. GPLd.
  *
- * $Id: flashchip.h,v 1.15 2004/11/05 22:41:06 nico Exp $
+ * $Id: flashchip.h,v 1.16 2005/02/08 17:11:15 nico Exp $
  *
  */
 
@@ -29,6 +29,7 @@ typedef enum {
         FL_ERASE_SUSPENDED,
         FL_WRITING,
         FL_WRITING_TO_BUFFER,
+        FL_OTP_WRITE,
         FL_WRITE_SUSPENDING,
         FL_WRITE_SUSPENDED,
         FL_PM_SUSPENDED,
diff --git a/include/linux/mtd/map.h b/include/linux/mtd/map.h
index f0268b99c900..8fc6679aa9b1 100644
--- a/include/linux/mtd/map.h
+++ b/include/linux/mtd/map.h
@@ -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;
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index b3d134392b31..3aab1b8729e0 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -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.
diff --git a/include/mtd/mtd-abi.h b/include/mtd/mtd-abi.h
index a76ab898f445..091eb571e993 100644
--- a/include/mtd/mtd-abi.h
+++ b/include/mtd/mtd-abi.h
@@ -1,5 +1,5 @@
 /*
- * $Id: mtd-abi.h,v 1.7 2004/11/23 15:37:32 gleixner Exp $
+ * $Id: mtd-abi.h,v 1.8 2005/02/08 17:11:16 nico Exp $
  *
  * Portions of MTD ABI definition which are shared by kernel and user space 
  */
@@ -80,6 +80,12 @@ struct region_info_user {
         uint32_t regionindex;
 };
 
+struct otp_info {
+        uint32_t start;
+        uint32_t length;
+        uint32_t locked;
+};
+
 #define MEMGETINFO              _IOR('M', 1, struct mtd_info_user)
 #define MEMERASE                _IOW('M', 2, struct erase_info_user)
 #define MEMWRITEOOB             _IOWR('M', 3, struct mtd_oob_buf)