[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>

1 files changed, 27 insertions, 1 deletions

diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 96ebb52f24b1..b92e6bfffaf2 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -5,7 +5,7 @@
  *
  * This code is GPL
  *
- * $Id: mtdpart.c,v 1.51 2004/11/16 18:28:59 dwmw2 Exp $
+ * $Id: mtdpart.c,v 1.53 2005/02/08 17:11:13 nico Exp $
  *
  *      02-21-2002      Thomas Gleixner <gleixner@autronix.de>
  *                      added support for read_oob, write_oob
@@ -116,6 +116,13 @@ static int part_read_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t le
                                         len, retlen, buf);
 }
 
+static int part_get_user_prot_info (struct mtd_info *mtd,
+                                    struct otp_info *buf, size_t len)
+{
+        struct mtd_part *part = PART(mtd);
+        return part->master->get_user_prot_info (part->master, buf, len);
+}
+
 static int part_read_fact_prot_reg (struct mtd_info *mtd, loff_t from, size_t len, 
                         size_t *retlen, u_char *buf)
 {
@@ -124,6 +131,13 @@ static int part_read_fact_prot_reg (struct mtd_info *mtd, loff_t from, size_t le
                                         len, retlen, buf);
 }
 
+static int part_get_fact_prot_info (struct mtd_info *mtd,
+                                    struct otp_info *buf, size_t len)
+{
+        struct mtd_part *part = PART(mtd);
+        return part->master->get_fact_prot_info (part->master, buf, len);
+}
+
 static int part_write (struct mtd_info *mtd, loff_t to, size_t len,
                         size_t *retlen, const u_char *buf)
 {
@@ -182,6 +196,12 @@ static int part_write_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t l
                                         len, retlen, buf);
 }
 
+static int part_lock_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t len) 
+{
+        struct mtd_part *part = PART(mtd);
+        return part->master->lock_user_prot_reg (part->master, from, len);
+}
+
 static int part_writev (struct mtd_info *mtd,  const struct kvec *vecs,
                          unsigned long count, loff_t to, size_t *retlen)
 {
@@ -409,6 +429,12 @@ int add_mtd_partitions(struct mtd_info *master,
                         slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
                 if(master->write_user_prot_reg)
                         slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
+                if(master->lock_user_prot_reg)
+                        slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
+                if(master->get_user_prot_info)
+                        slave->mtd.get_user_prot_info = part_get_user_prot_info;
+                if(master->get_fact_prot_info)
+                        slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
                 if (master->sync)
                         slave->mtd.sync = part_sync;
                 if (!i && master->suspend && master->resume) {