#
# U-Boot bootscript for NAND images created by Yocto.
#

# As the first step in the boot script, check if we are using DualBoot and
# if an upgrade is available. This requires the script to change some variables
# and save them, while the rest of the script changes variables only temporarily
# without saving them.

# Dual boot update verification
if test "${dualboot}" = "yes"; then
	if test "${upgrade_available}" = "1"; then
		echo "Update detected; Booting new system (try ${bootcount})"
		if test "${bootcount}" = "${bootlimit}"; then
			echo "## Update failed; Rolling back to previous version."
			if test "${mtdbootpart}" = "linux_a"; then
				setenv mtdbootpart linux_b
				setenv mtdlinuxindex ${mtdlinux_b_index}
				setenv mtdrootfsindex ${mtdrootfs_b_index}
				setenv rootfsvol ${rootfsvol_b}
			else
				setenv mtdbootpart linux_a
				setenv mtdlinuxindex ${mtdlinux_a_index}
				setenv mtdrootfsindex ${mtdrootfs_a_index}
				setenv rootfsvol ${rootfsvol_a}
			fi
			setenv active_system ${mtdbootpart}
			setenv upgrade_available
			saveenv
		fi
	else
		if test "${active_system}" = "linux_a"; then
			echo "Booting from system A"
			setenv mtdbootpart ${active_system}
			setenv mtdlinuxindex ${mtdlinux_a_index}
			setenv mtdrootfsindex ${mtdrootfs_a_index}
			setenv rootfsvol ${rootfsvol_a}
		else
			echo "Booting from system B"
			setenv mtdbootpart ${active_system}
			setenv mtdlinuxindex ${mtdlinux_b_index}
			setenv mtdrootfsindex ${mtdrootfs_b_index}
			setenv rootfsvol ${rootfsvol_b}
		fi
	fi
else
	if test "${mtdbootpart}" = "recovery"; then
		setenv boot_initrd true
		setenv initrd_file uramdisk-recovery.img
	else
		true
	fi
fi


# Back up environment variables
setenv ORIG_extra_bootargs ${extra_bootargs}

#
# Set device tree filename depending on the board ID (if defined)
#
if test -n "${board_id}"; then
	setenv fdt_file imx6ul-ccimx6ulstarter-id${board_id}.dtb
else
	#
	# Set device tree filename depending on the hardware variant
	#
	if test "${module_variant}" = "0x02"; then
		setenv fdt_file imx6ul-ccimx6ulstarter-wb.dtb
	elif test "${module_variant}" = "0x03"; then
		setenv fdt_file imx6ul-ccimx6ulstarter.dtb
	elif test "${module_variant}" = "0x04"; then
		setenv fdt_file imx6ul-ccimx6ulstarter-wb.dtb
	elif test "${module_variant}" = "0x05"; then
		setenv fdt_file imx6ul-ccimx6ulstarter.dtb
	elif test "${module_variant}" = "0x06"; then
		setenv fdt_file imx6ul-ccimx6ulstarter-wb.dtb
	elif test "${module_variant}" = "0x07"; then
		setenv fdt_file imx6ul-ccimx6ulstarter-wb.dtb
	elif test "${module_variant}" = "0x08"; then
		setenv fdt_file imx6ul-ccimx6ulstarter-wb.dtb
	elif test "${module_variant}" = "0x09"; then
		setenv fdt_file imx6ul-ccimx6ulstarter-wb.dtb
	elif test "${module_variant}" = "0x0a"; then
		setenv fdt_file imx6ul-ccimx6ulstarter.dtb
	else
		setenv fdt_file imx6ul-ccimx6ulstarter-wb.dtb
	fi
fi

setenv extra_bootargs fbcon=logo-pos:center ${extra_bootargs}
dboot linux nand ${mtdbootpart}



# We only get here in case of an error on the dboot command.

# Undo changes to environment variables
setenv extra_bootargs ${ORIG_extra_bootargs}
setenv ORIG_extra_bootargs