Warn of one-time programmable (OTP) memory

Some flash chips contain OTP memory that we cannot read or write (yet). This
prohibits us from cloning them, hence warn the user if we detect it. Not all
variations of the tagged chips contain OTP memory. They are often only
enabled on request or have there own ordering numbers. There is usually no
way to distinguish them. Because this is a supposedly seldomly used feature
the warning is shown in with dbg verbosity.

The manpage is extended to describe the backgrounds a bit.

This patch is based on the idea and code of Daniel Lenski.
Signed-off-by: Daniel Lenski <dlenski@gmail.com>
Signed-off-by: Stefan Tauner <stefan.tauner@student.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

git-svn-id: https://code.coreboot.org/svn/flashrom/trunk@1493 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 1 insertions, 0 deletions

diff --git a/flash.h b/flash.h
index e51b6d4..20db343 100644
--- a/flash.h
+++ b/flash.h
@@ -83,6 +83,7 @@ enum chipbustype {
 #define FEATURE_ADDR_SHIFTED	(1 << 5)
 #define FEATURE_WRSR_EWSR	(1 << 6)
 #define FEATURE_WRSR_WREN	(1 << 7)
+#define FEATURE_OTP		(1 << 8)
 #define FEATURE_WRSR_EITHER	(FEATURE_WRSR_EWSR | FEATURE_WRSR_WREN)
 
 struct flashctx;