81 lines
2.4 KiB
Plaintext
81 lines
2.4 KiB
Plaintext
#
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# U-Boot bootscript for NAND/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 in ${active_system} (try ${bootcount})"
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else
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if test "${active_system}" = "linux_a"; then
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echo "Booting from system A"
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setenv mtdbootpart ${active_system}
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setenv rootfsvol ${rootfsvol_a}
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else
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echo "Booting from system B"
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setenv mtdbootpart ${active_system}
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setenv rootfsvol ${rootfsvol_b}
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fi
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fi
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else
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# Check the boot source.
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if test "${mtdbootpart}" = "linux"; then
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# We are booting from the NAND using 'linux'.
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true
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elif test "${mtdbootpart}" = "recovery"; then
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# We are booting from the NAND using 'recovery'.
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setenv boot_initrd true
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setenv initrd_file uramdisk-recovery.img
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else
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# We are booting from the SD card.
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setenv mmcroot /dev/mmcblk${mmcbootdev}p2
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fi
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setenv rootfsvol rootfs
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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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#
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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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setexpr module_has_mca ${hwid_2} \& 10000
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setexpr module_has_mca ${module_has_mca} / 10000
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setexpr module_has_wifi ${hwid_2} \& 20000
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setexpr module_has_wifi ${module_has_wifi} / 20000
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setexpr module_has_bt ${hwid_2} \& 40000
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setexpr module_has_bt ${module_has_bt} / 40000
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if test "${module_has_bt}" = "1" && test -z "${disable_bt}"; then
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setenv overlays _ov_som_bt_ccmp15.dtbo,${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_ccmp15.dtbo,${overlays}
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fi
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if test "${module_has_mca}" = "1" && test -z "${disable_mca}"; then
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setenv overlays _ov_som_mca_ccmp15.dtbo,${overlays}
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fi
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# Apply DVKv1 overlay if the board_version is 1
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if test -z "${board_version}" || test "${board_version}" -eq "1"; then
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setenv overlays _ov_board_v1_ccmp15-dvk.dtbo,${overlays}
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fi
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dboot linux nand ${mtdbootpart}
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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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