add script to create 12MB image from 4MB release image for internal flashing

work in progress #18

.gitignore

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+output

prepare_internal_flashing.sh

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+#!/bin/bash
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+NC='\033[0m'
+
+set -e
+have_input_image=0
+
+usage()
+{
+	echo "Usage: $0 -i <4mb_top_image>.rom"
+}
+
+args=$(getopt -o i:h -- "$@")
+if [ $? -ne 0 ] ; then
+	usage
+	exit 1
+fi
+
+eval set -- "$args"
+while [ $# -gt 0 ]
+do
+	case "$1" in
+	-i)
+		INPUT_IMAGE=$2
+		have_input_image=1
+		shift
+		;;
+	-h)
+		usage
+		exit 1
+		;;
+	--)
+		shift
+		break
+		;;
+	*)
+		echo "Invalid option: $1"
+		exit 1
+		;;
+	esac
+	shift
+done
+
+OUTPUT_IMAGE=${INPUT_IMAGE%%.*}_prepared_12mb.rom
+
+if [ "$have_input_image" -gt 0 ] ; then
+	echo "creating"
+	echo "output/${OUTPUT_IMAGE}"
+	echo "from"
+	echo "${INPUT_IMAGE}"
+echo "---------------------------------------------------------"
+else
+	echo "no input image provided"
+	usage
+	exit 1
+fi
+
+rm -rf output
+mkdir output && cd output
+dd if=/dev/zero of=${OUTPUT_IMAGE} bs=4M count=2
+
+cp ../${INPUT_IMAGE} .
+dd if=${INPUT_IMAGE} oflag=append conv=notrunc of=${OUTPUT_IMAGE} bs=4M
+
+echo "0x00000000:0x007fffff ifdmegbe" > x230-layout.txt
+echo "0x00800000:0x00bfffff bios" >> x230-layout.txt
+
+rm ${INPUT_IMAGE}
+
+echo "---------------------------------------------------------"
+echo -e "${RED}CAUTION: internal flashing is NOT encouraged${NC}"
+echo ""
+echo "prepared files for internal flashing in output directory."
+echo "template flashrom command (please adapt the chip name) :"
+echo ""
+echo "cd output"
+echo -e "${GREEN}flashrom -p internal:laptop=force_I_want_a_brick,spispeed=128 --layout x230-layout.txt --image bios -c "MX25L3206E" -w ${OUTPUT_IMAGE}${NC}"