137 lines
4.5 KiB
Plaintext
137 lines
4.5 KiB
Plaintext
#
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# U-Boot bootscript for EMMC/SD images created by Yocto.
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#
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# As the first step in the boot script, check if we are using DualBoot and
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# if an upgrade is available. This requires the script to change some variables
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# and save them, while the rest of the script changes variables only temporarily
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# without saving them.
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# Dual boot update verification
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if test "${dualboot}" = "yes"; then
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if test "${upgrade_available}" = "1"; then
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echo "Update detected; Booting new system (try ${bootcount})"
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if test "${bootcount}" = "${bootlimit}"; then
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echo "## Update failed; Rolling back to previous version."
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if test "${active_system}" = "linux_a"; then
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part number mmc ${mmcbootdev} linux_b pi
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setenv mmcpart ${pi}
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# Save the partition index on variable rootfs_b_index
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part number mmc ${mmcbootdev} rootfs_b rootfs_b_index
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# Save the rootfs_b UUID into mmcroot_b
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part uuid mmc ${mmcbootdev}:${rootfs_b_index} mmcroot_b
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setenv mmcroot PARTUUID=${mmcroot_b}
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setenv active_system linux_b
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else
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part number mmc ${mmcbootdev} linux_a pi
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setenv mmcpart ${pi}
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# Save the partition index on variable rootfs_a_index
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part number mmc ${mmcbootdev} rootfs_a rootfs_a_index
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# Save the rootfs_a UUID into mmcroot_a
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part uuid mmc ${mmcbootdev}:${rootfs_a_index} mmcroot_a
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setenv mmcroot PARTUUID=${mmcroot_a}
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setenv active_system linux_a
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fi
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setenv upgrade_available
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saveenv
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fi
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else
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if test "${active_system}" = "linux_a"; then
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echo "Booting from system A"
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part number mmc ${mmcbootdev} linux_a pi
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setenv mmcpart ${pi}
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# Save the partition index on variable rootfs_a_index
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part number mmc ${mmcbootdev} rootfs_a rootfs_a_index
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# Save the rootfs_a UUID into mmcroot_a
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part uuid mmc ${mmcbootdev}:${rootfs_a_index} mmcroot_a
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setenv mmcroot PARTUUID=${mmcroot_a}
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else
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echo "Booting from system B"
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part number mmc ${mmcbootdev} linux_b pi
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setenv mmcpart ${pi}
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# Save the partition index on variable rootfs_b_index
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part number mmc ${mmcbootdev} rootfs_b rootfs_b_index
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# Save the rootfs_b UUID into mmcroot_b
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part uuid mmc ${mmcbootdev}:${rootfs_b_index} mmcroot_b
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setenv mmcroot PARTUUID=${mmcroot_b}
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fi
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fi
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else
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# Get the UUID of the configured boot partition.
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part uuid mmc ${mmcbootdev}:${mmcpart} bootpart
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# Check the boot source.
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if test "${bootpart}" = "${part1_uuid}"; then
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# We are booting from the eMMC using 'linux'.
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true
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elif test "${bootpart}" = "${part2_uuid}"; then
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# We are booting from the eMMC using 'recovery'.
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setenv boot_initrd true
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setenv initrd_file uramdisk-recovery.img
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else
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# We are booting from the SD card.
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setenv mmcroot /dev/mmcblk${mmcbootdev}p2
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fi
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fi
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# Back up environment variables
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setenv ORIG_overlays ${overlays}
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setenv ORIG_extra_bootargs ${extra_bootargs}
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# Set SOC type to "imx8qxp" if not already defined by U-Boot
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if test ! -n "${soc_type}"; then
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setenv soc_type "imx8qxp"
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fi
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#
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# Determine overlays to apply depending on the hardware capabilities
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# described by the HWID, SOM version, and carrier board version.
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#
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if test -n "${module_ram}"; then
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setexpr module_has_wifi ${hwid_3} \& 1
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setexpr module_has_bt ${hwid_3} \& 2
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setexpr module_has_bt ${module_has_bt} / 2
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if test "${module_has_bt}" = "1" && test -z "${disable_bt}"; then
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setenv overlays _ov_som_bt_ccimx8x.dtbo,${overlays}
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fi
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if test "${module_has_wifi}" = "1" && test -z "${disable_wifi}"; then
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setenv overlays _ov_som_wifi_ccimx8x.dtbo,${overlays}
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fi
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else
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#
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# Set overlays depending on the hardware variant
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#
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if test "${module_variant}" = "0x01"; then
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setenv overlays _ov_som_bt_ccimx8x.dtbo,_ov_som_wifi_ccimx8x.dtbo,${overlays}
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elif test "${module_variant}" = "0x02"; then
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setenv overlays _ov_som_bt_ccimx8x.dtbo,_ov_som_wifi_ccimx8x.dtbo,${overlays}
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elif test "${module_variant}" = "0x04"; then
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setenv overlays _ov_som_bt_ccimx8x.dtbo,_ov_som_wifi_ccimx8x.dtbo,${overlays}
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fi
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fi
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# Apply QXP overlay if the SOC type is "imx8qxp"
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if test "${soc_type}" = "imx8qxp"; then
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setenv overlays _ov_som_quad_ccimx8x.dtbo,${overlays}
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fi
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# Apply SBCv3 overlay if the board_version is 3 or lesser
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if test "${board_version}" -le "3"; then
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setenv overlays _ov_board_v1-v3_ccimx8x-sbc-pro.dtbo,${overlays}
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fi
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setenv extra_bootargs fbcon=logo-pos:center ${extra_bootargs}
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dboot linux mmc ${mmcbootdev}:${mmcpart}
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# We only get here in case of an error on the dboot command.
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# Undo changes to environment variables
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setenv overlays ${ORIG_overlays}
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setenv ORIG_overlays
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setenv extra_bootargs ${ORIG_extra_bootargs}
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setenv ORIG_extra_bootargs
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