sd_fuse() { if [ ! -b /dev/mmcblk0 ]; then echo "No MMC device to flash, exiting." exit 0 fi if [ -d /sys/block/mmcblk0boot0 ]; then echo "/dev/mmcblk0 is an eMMC card, disabling read-only.." if ! echo 0 > /sys/block/mmcblk0boot0/force_ro; then echo "Disabling read-only for /dev/mmcblk0boot0 failed." exit 1 fi signed_bl1_position=0 bl2_position=30 uboot_position=62 tzsw_position=2110 device=/dev/mmcblk0boot0 else signed_bl1_position=1 bl2_position=31 uboot_position=63 tzsw_position=2111 device=/dev/mmcblk0 fi echo "BL1 fusing" dd iflag=dsync oflag=dsync if=/boot/bl1.HardKernel of=$device seek=$signed_bl1_position echo "BL2 fusing" dd iflag=dsync oflag=dsync if=/boot/bl2.HardKernel of=$device seek=$bl2_position echo "u-boot fusing" dd iflag=dsync oflag=dsync if=/boot/u-boot.bin of=$device seek=$uboot_position echo "TrustZone S/W fusing" dd iflag=dsync oflag=dsync if=/boot/tzsw.HardKernel of=$device seek=$tzsw_position } flash_uboot() { echo "A new U-Boot version needs to be flashed onto /dev/mmcblk0." echo "Do you want to do this now? [y|N]" read -r shouldwe if [[ $shouldwe =~ ^([yY][eE][sS]|[yY])$ ]]; then sd_fuse else echo "You can do this later by running:" echo "# cd /boot; ./sd_fusing.sh /dev/mmcblk0" fi } post_install() { flash_uboot } post_upgrade() { flash_uboot }