add flashrom_rpi_bottom_unlock.sh for unlocking the 8m chip

flashrom_rpi_bottom_unlock.sh

@@ -0,0 +1,135 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2018, Martin Kepplinger <martink@posteo.de>
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+NC='\033[0m'
+
+set -e
+
+IFDTOOL_PATH=./util/ifdtool/ifdtool
+ME_CLEANER_PATH=./util/me_cleaner/me_cleaner.py
+have_chipname=0
+have_backupname=0
+me_clean=0
+
+usage()
+{
+	echo "Usage: $0 -c <chipname> [-m] [-k <backup_filename>]"
+	echo ""
+	echo "-m              apply me_cleaner -S"
+}
+
+args=$(getopt -o mc:k:h -- "$@")
+if [ $? -ne 0 ] ; then
+	usage
+	exit 1
+fi
+
+eval set -- "$args"
+while [ $# -gt 0 ]
+do
+	case "$1" in
+	-m)
+		me_clean=1
+		shift
+		;;
+	-c)
+		CHIPNAME=$2
+		have_chipname=1
+		shift
+		;;
+	-k)
+		BACKUPNAME=$2
+		have_backupname=1
+		shift
+		;;
+	-h)
+		usage
+		exit 1
+		;;
+	--)
+		shift
+		break
+		;;
+	*)
+		echo "Invalid option: $1"
+		exit 1
+		;;
+	esac
+	shift
+done
+
+if [ ! "$have_chipname" -gt 0 ] ; then
+	echo "no chipname provided. to find it out, run:"
+	echo "flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128"
+	usage
+	exit 1
+fi
+
+make -C util/ifdtool
+if [ ! -e ${IFDTOOL_PATH} ] ; then
+	echo "ifdtool not found at ${IFDTOOL_PATH}"
+	exit 1
+fi
+
+if [ ! "$me_clean" -gt 0 ] ; then
+	echo "Intel ME will NOT be cleaned. Use -m if it should be."
+else
+	echo "Intel ME will be cleaned."
+fi
+
+if [ "$me_clean" -gt 0 ] ; then
+	if [ ! -e ${ME_CLEANER_PATH} ] ; then
+		echo "me_cleaner not found at ${ME_CLEANER_PATH}"
+		exit 1
+	fi
+fi
+
+echo "start reading ..."
+TEMP_DIR=`mktemp -d`
+if [[ ! "$TEMP_DIR" || ! -d "$TEMP_DIR" ]]; then
+	echo -e "${RED}Error:${NC} Could not create temp dir"
+	exit 1
+fi
+flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128 -c ${CHIPNAME} -r ${TEMP_DIR}/test1.rom
+flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128 -c ${CHIPNAME} -r ${TEMP_DIR}/test2.rom
+cmp --silent ${TEMP_DIR}/test1.rom ${TEMP_DIR}/test2.rom
+if [ "$have_backupname" -gt 0 ] ; then
+	mv ${TEMP_DIR}/test1.rom ${BACKUPNAME}
+	echo "current image saved as ${BACKUPIMAGE}"
+fi
+
+reference_size=8388608
+TEMP_SIZE=$(wc -c <"$TEMP_DIR/test1.rom")
+if [ ! "$reference_size" -eq "$TEMP_SIZE" ] ; then
+	echo -e "${RED}Error:${NC} didn't read 8M. You might be at the wrong chip."
+	rm -rf ${TEMP_DIR}
+	exit 1
+fi
+
+echo -e "${GREEN}connection ok${NC}"
+
+echo "start unlocking ..."
+if [ "$me_clean" -gt 0 ] ; then
+	${ME_CLEANER_PATH} -S -O ${TEMP_DIR}/work.rom ${TEMP_DIR}/test1.rom
+else
+	cp ${TEMP_DIR}/test1.rom ${TEMP_DIR}/work.rom
+fi
+
+${IFDTOOL_PATH} -u ${TEMP_DIR}/work.rom
+if if [ ! -e ${TEMP_DIR}/work.rom.new ] ; then
+	echo -e "${RED}Error:${NC} Unlocking failed. ${TEMP_DIR}/work.rom.new not found."
+	rm -rf ${TEMP_DIR}
+	exit 1
+fi
+if [ "$me_clean" -gt 0 ] ; then
+	echo -e "${GREEN}unlock and me_cleaner ok${NC}"
+else
+	echo -e "${GREEN}unlock ok${NC}"
+fi
+make clean -C util/ifdtool
+
+echo "start writing..."
+flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128 -c ${CHIPNAME} -w ${TEMP_DIR}/work.rom.new
+echo -e "${GREEN}DONE${NC}"