#
# U-Boot bootscript for EMMC/SD images created by Yocto.
#

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

# Build boot attempt message string
if test "${bootlimit}" -gt 0 && test "${bootcount}" -gt 0; then
	bootattempt="(boot attempt ${bootcount}/${bootlimit})"
fi

# Pre step: check if we boot from uSD.
if test "${mmcbootdev}" = "1"; then
	# We are booting from the SD card.
	setenv mmcroot /dev/mmcblk${mmcbootdev}p2
elif test "${dualboot}" = "yes"; then
	if test "${active_system}" = "linux_a"; then
		echo "Booting from system A ${bootattempt}"
		part number mmc ${mmcbootdev} linux_a tmp_mmcpart
		part number mmc ${mmcbootdev} rootfs_a tmp_rootfs_index
	else
		echo "Booting from system B ${bootattempt}"
		part number mmc ${mmcbootdev} linux_b tmp_mmcpart
		part number mmc ${mmcbootdev} rootfs_b tmp_rootfs_index
	fi
	part uuid mmc ${mmcbootdev}:${tmp_rootfs_index} tmp_mmcroot
	if test "${mmcpart}" -ne "${tmp_mmcpart}"; then
		setexpr mmcpart ${tmp_mmcpart}
		env_save_needed="1"
	fi
	if test "${mmcroot}" != "PARTUUID=${tmp_mmcroot}"; then
		setenv mmcroot PARTUUID=${tmp_mmcroot}
		env_save_needed="1"
	fi
	if test "${env_save_needed}" = "1"; then
		env delete tmp_mmcpart tmp_rootfs_index tmp_mmcroot
		env save
	fi
else
	echo "Booting system ${bootattempt}"
	# Get the UUID of the configured boot partition.
	part uuid mmc ${mmcbootdev}:${mmcpart} bootpart
	# Check the boot source.
	if test "${bootpart}" = "${part5_uuid}"; then
		# We are booting from the eMMC using 'linux'.
		true
	elif test "${bootpart}" = "${part6_uuid}"; then
		# We are booting from the eMMC using 'recovery'.
		setenv boot_initrd true
		setenv initrd_file uramdisk-recovery.img
	fi
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_wifi ${hwid_2} \& 10000
setexpr module_has_wifi ${module_has_wifi} / 10000
setexpr module_has_bt ${hwid_2} \& 20000
setexpr module_has_bt ${module_has_bt} / 20000

if test "${module_has_bt}" = "1" && test -z "${disable_bt}"; then
	setenv overlays ccmp25_bt.dtbo,${overlays}
fi

if test "${module_has_wifi}" = "1" && test -z "${disable_wifi}"; then
	setenv overlays ccmp25_wifi.dtbo,${overlays}
fi

dboot linux mmc ${mmcbootdev}:${mmcpart}

# 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
