flash_ec: add support for SWD, nrf51, and hadoken

BUG=none
TEST=manual
BRANCH=none

flash_ec --board=hadoken
flash_ec --board=npcx_evb
flash_ec --board=samus

Use openocd in SWD mode to flash the nRF51 chip.

Use warm_reset to exit DEBUG mode.

Change-Id: Iaf2827d4ce5be6d61431a3de7ab4f86aa4adde02
Signed-off-by: Myles Watson <mylesgw@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/287039
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/util/openocd/nrf51_cmds.tcl b/util/openocd/nrf51_cmds.tcl
new file mode 100644
index 0000000000..711b27574d
--- /dev/null
+++ b/util/openocd/nrf51_cmds.tcl
@@ -0,0 +1,22 @@
+# Copyright 2015 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+# Command automation for Nordic nRF51 chip
+
+proc flash_nrf51 {path offset} {
+	reset halt;
+	program $path $offset;
+}
+
+proc unprotect_nrf51 { } {
+	reset halt;
+	nrf51 mass_erase;
+}
+
+# enable reset by writing 1 to the RESET register
+# This will disconnect the debugger with the following message:
+# Polling target nrf51.cpu failed, trying to reexamine
+proc exit_debug_mode_nrf51 { } {
+	mww 0x40000544 1;
+}