#
# U-Boot bootscript for NAND/SD 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 in ${active_system} (try ${bootcount})"
	else
		if test "${active_system}" = "linux_a"; then
			echo "Booting from system A"
			setenv mtdbootpart ${active_system}
			setenv rootfsvol ${rootfsvol_a}
		else
			echo "Booting from system B"
			setenv mtdbootpart ${active_system}
			setenv rootfsvol ${rootfsvol_b}
		fi
	fi
else
	# Check the boot source.
	if test "${mtdbootpart}" = "linux"; then
		# We are booting from the NAND using 'linux'.
		true
	elif test "${mtdbootpart}" = "recovery"; then
		# We are booting from the NAND using 'recovery'.
		setenv boot_initrd true
		setenv initrd_file uramdisk-recovery.img
	else
		# We are booting from the SD card.
		setenv mmcroot /dev/mmcblk${mmcbootdev}p2
	fi
	setenv rootfsvol rootfs
fi

# Back up environment variables
setenv ORIG_overlays ${overlays}

#
# Determine overlays to apply depending on the hardware capabilities
# described by the HWID, SOM version, and carrier board version.
#
setexpr module_has_mca ${hwid_2} \& 10000
setexpr module_has_mca ${module_has_mca} / 10000
setexpr module_has_wifi ${hwid_2} \& 20000
setexpr module_has_wifi ${module_has_wifi} / 20000
setexpr module_has_bt ${hwid_2} \& 40000
setexpr module_has_bt ${module_has_bt} / 40000

if test "${module_has_bt}" = "1" && test -z "${disable_bt}"; then
	setenv overlays _ov_som_bt_ccmp15.dtbo,${overlays}
fi

if test "${module_has_wifi}" = "1" && test -z "${disable_wifi}"; then
	setenv overlays _ov_som_wifi_ccmp15.dtbo,${overlays}
fi

if test "${module_has_mca}" = "1" && test -z "${disable_mca}"; then
	setenv overlays _ov_som_mca_ccmp15.dtbo,${overlays}
fi

# Apply DVKv1 overlay if the board_version is 1
if test -z "${board_version}" || test "${board_version}" -eq "1"; then
	setenv overlays _ov_board_v1_ccmp15-dvk.dtbo,${overlays}
fi

dboot linux nand ${mtdbootpart}



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

# Undo changes to environment variables
setenv overlays ${ORIG_overlays}
setenv ORIG_overlays