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#!/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
have_input_image=0
have_chipname=0
have_backupname=0
have_flasher=0
rpi_frequency=0
usage()
{
echo "Skulls for the X230"
echo " Run this script on an external computer with a flasher"
echo " connected to the X230's top chip (closer to the display"
echo " and farther from you)"
echo ""
echo "Usage: $0 [-i <image.rom>] [-c <chipname>] [-k <backup_filename>] [-f <flasher>] [-b <spispeed>]"
echo ""
echo " -f <hardware_flasher> supported flashers: rpi, ch341a"
echo " -i <image> path to image to flash"
echo " -c <chipname> to use for flashrom"
echo " -k <backup> save the current image as"
echo " -b <spi frequency> frequency of the RPi SPI bus in Hz. default: 128"
}
args=$(getopt -o f:i:c:k:hb: -- "$@")
if [ $? -ne 0 ] ; then
usage
exit 1
fi
eval set -- "$args"
while [ $# -gt 0 ]
do
case "$1" in
-f)
FLASHER=$2
have_flasher=1
shift
;;
-i)
INPUT_IMAGE_PATH=$2
have_input_image=1
shift
;;
-c)
CHIPNAME=$2
have_chipname=1
shift
;;
-k)
BACKUPNAME=$2
have_backupname=1
shift
;;
-b)
rpi_frequency=$2
shift
;;
-h)
usage
exit 1
;;
--)
shift
break
;;
*)
echo "Invalid option: $1"
exit 1
;;
esac
shift
done
command -v flashrom >/dev/null 2>&1 || { echo -e >&2 "${RED}Please install flashrom and run as root${NC}."; exit 1; }
command -v mktemp >/dev/null 2>&1 || { echo -e >&2 "${RED}Please install mktemp (coreutils)${NC}."; exit 1; }
if [ ! "$have_input_image" -gt 0 ] ; then
image_available=$(ls -1 | grep x230_coreboot_seabios || true)
if [ -z "${image_available}" ] ; then
echo "No image file found. Please add -i <file>"
echo ""
usage
exit 1
fi
prompt="Please select a file to flash or start with the -i option to use a different one:"
options=( $(find -maxdepth 1 -name "*rom" -print0 | xargs -0) )
PS3="$prompt "
select INPUT_IMAGE_PATH in "${options[@]}" "Quit" ; do
if (( REPLY == 1 + ${#options[@]} )) ; then
exit
elif (( REPLY > 0 && REPLY <= ${#options[@]} )) ; then
break
else
echo "Invalid option. Try another one."
fi
done
fi
if [ ! "$have_flasher" -gt 0 ] ; then
echo "Please select the hardware you use:"
PS3='Please select the hardware flasher: '
options=("Raspberry Pi" "CH341A" "Quit")
select opt in "${options[@]}"
do
case $opt in
"Raspberry Pi")
FLASHER="rpi"
break
;;
"CH341A")
FLASHER="ch341a"
break
;;
"Quit")
exit 0
;;
*) echo invalid option;;
esac
done
fi
if [ ! "${rpi_frequency}" -gt 0 ] ; then
rpi_frequency=512
fi
programmer=""
if [ "${FLASHER}" = "rpi" ] ; then
programmer="linux_spi:dev=/dev/spidev0.0,spispeed=${rpi_frequency}"
elif [ "${FLASHER}" = "ch341a" ] ; then
programmer="ch341a_spi"
else
echo "invalid flashrom programmer"
usage
exit 1
fi
TEMP_DIR=$(mktemp -d)
if [ ! -d "$TEMP_DIR" ]; then
echo "${RED}Error:${NC} Could not create temp dir"
exit 1
fi
if [ ! "$have_chipname" -gt 0 ] ; then
echo "trying to detect the chip..."
flashrom -p ${programmer} &> "${TEMP_DIR}"/chips || true
flashrom_error=""
flashrom_error=$(cat "${TEMP_DIR}"/chips | grep -i error || true)
if [ ! -z "${flashrom_error}" ] ; then
cat "${TEMP_DIR}"/chips
rm -rf "${TEMP_DIR}"
exit 1
fi
CHIPNAME=""
chip_found=0
if [ ! "$chip_found" -gt 0 ] ; then
CHIPNAME=$(cat "${TEMP_DIR}"/chips | grep Found | grep MX25L3206E | grep -oP '"\K[^"\047]+(?=["\047])' || true)
if [ ! -z "${CHIPNAME}" ] ; then
chip_found=1
fi
fi
if [ ! "$chip_found" -gt 0 ] ; then
CHIPNAME=$(cat "${TEMP_DIR}"/chips | grep Found | grep EN25QH32 | grep -oP '"\K[^"\047]+(?=["\047])' || true)
if [ ! -z "${CHIPNAME}" ] ; then
chip_found=1
fi
fi
if [ ! "$chip_found" -gt 0 ] ; then
echo "chip not detected."
flashrom -p ${programmer} || true
rm -rf "${TEMP_DIR}"
echo "Please find it manually in the list above and rerun with the -c parameter."
exit 1
else
echo -e "Detected ${GREEN}${CHIPNAME}${NC}."
fi
fi
INPUT_IMAGE_NAME=$(basename "${INPUT_IMAGE_PATH}")
INPUT_IMAGE_SIZE=$(wc -c < "$INPUT_IMAGE_PATH")
reference_filesize=4194304
if [ ! "$INPUT_IMAGE_SIZE" -eq "$reference_filesize" ] ; then
echo -e "${RED}Error:${NC} input file must be 4MB of size"
exit 1
fi
echo "verifying SPI connection by reading 2 times. please wait."
flashrom -p ${programmer} -c ${CHIPNAME} -r ${TEMP_DIR}/test1.rom
flashrom -p ${programmer} -c ${CHIPNAME} -r ${TEMP_DIR}/test2.rom
cmp --silent "${TEMP_DIR}"/test1.rom "${TEMP_DIR}"/test2.rom
if [ "$have_backupname" -gt 0 ] ; then
cp "${TEMP_DIR}"/test1.rom "${BACKUPNAME}"
sha256sum "${TEMP_DIR}"/test1.rom > "${BACKUPNAME}".sha256
echo "current image saved as ${BACKUPNAME}"
fi
TEMP_SIZE=$(wc -c < "$TEMP_DIR/test1.rom")
if [ ! "$INPUT_IMAGE_SIZE" -eq "$TEMP_SIZE" ] ; then
echo -e "${RED}Error:${NC} read image (${TEMP_SIZE}) has different size that new image $INPUT_IMAGE_NAME (${INPUT_IMAGE_SIZE})"
exit 1
fi
rm -rf "${TEMP_DIR}"
echo -e "${GREEN}connection ok${NC}. flashing ${INPUT_IMAGE_NAME}"
flashrom -p ${programmer} -c "${CHIPNAME}" -w "${INPUT_IMAGE_PATH}"
echo -e "${GREEN}DONE${NC}"