#!/usr/bin/env bash

set -e

SN="$1"
if [ -z "${SN}" ] ; then
	echo A non empty serial number is required as first argument
fi

SPEED=${SPEED=16500}
CHIP="MX25L12835F/MX25L12845E/MX25L12865E/MX25L12873F"
DEV="linux_spi:dev=/dev/spidev0.0,spispeed=${SPEED}"

echo "Testing for a flash chip"
flashrom -p ${DEV} -c ${CHIP} 

echo "Dumping flash"

# Secure the flash twice
flashrom -r AP105-${SN}-dump0.rom -p ${DEV} -c ${CHIP} 
flashrom -r AP105-${SN}-dump1.rom -p ${DEV} -c ${CHIP}

echo "Patching rom"
cp AP105-${SN}-dump0.rom AP105-${SN}-patch.rom
dd if=/dev/zero bs=256K count=1 |tr "\000" "\377" |dd of=AP105-${SN}-patch.rom conv=notrunc
dd if=u-boot.bin of=AP105-${SN}-patch.rom conv=notrunc


echo "Rom patched. Press enter to flash"
read
flashrom -w AP105-${SN}-patch.rom -p ${DEV} -c ${CHIP}