From 2e46384b04a8f60589e8f7ad9333e6903b6c7f06 Mon Sep 17 00:00:00 2001
From: Werner Almesberger <werner@almesberger.net>
Date: Thu, 12 Jan 2012 14:03:43 -0300
Subject: [PATCH] m1nor: lock the read-only portions of the flash after
 flashing

---
 m1/tools/m1nor | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/m1/tools/m1nor b/m1/tools/m1nor
index 0d8c866..5ff23d9 100755
--- a/m1/tools/m1nor
+++ b/m1/tools/m1nor
@@ -100,9 +100,20 @@ EOF
 		classify "$n"
 		echo flashmem "$off" "$n" noverify
 	done
+	echo lockflash 0 55
+	echo detectflash 0
 	echo pld reconfigure
 ) | jtag -q || exit
 
+#
+# Fun fact: a direct flashmem-lockflash-pld reconfigure sequence leaves
+# the FPGA in a weird state from which it can't boot out of standby, neither
+# via JTAG (pld load ...) or by pressing the middle button.
+#
+# The only thing that seems to help is to run "detectflash" after the locking.
+# (Tried "peek", "usleep", "pld readreg", ... without success.)
+#
+
 #
 # FIXME: the exit code of "jtag" doesn't indicate whether the session was
 # successful.