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d42a7c4699
Ubiquity allows flashing of unsigned factory images via TFTP recovery method[1]. They claim in airOS v6.0.7 release changelog[2] following: All future airOS versions will be signed in this way and not allow unsigned firmware to be loaded except via TFTP. U-boot bootloader on M-XW devices expects factory image revision version in specific format. On airOS v6.1.7 with `U-Boot 1.1.4-s1039 (May 24 2017 - 15:58:18)` bootloader checks if the revision major(?) number is actually a number, but in currently generated images there's OpenWrt text and so the check fails: Hit any key to stop autoboot: 0 Setting default IP 192.168.1.20 Starting TFTP server... Receiving file from 192.168.1.25:38438 Received 4981148 bytes Firmware check failed! (1) By placing arbitrary correct number first in major version, we make the bootloader happy and we can flash factory images over TFTP again: Received 3735964 bytes Firmware Version: XW.ar934x.v6.0.4-42.r8474-56aa1ac-OpenWrt Setting U-Boot environment variables Un-Protected 1 sectors Erasing Flash.... done Patch provided by AREDN[3] project, tested on Bullet M2 XW (ynezz) and Nanostation M5 XW (ae6xe). 1. https://help.ubnt.com/hc/en-us/articles/204910124-UniFi-TFTP-Recovery-for-Bricked-Access-Points 2. https://dl.ubnt.com/firmwares/XW-fw/v6.0.7/changelog.txt 3. https://github.com/aredn Signed-off-by: Petr Štetiar <ynezz@true.cz> |
6 years ago | |
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| base-files | 6 years ago | |
| dts | 6 years ago | |
| files | 6 years ago | |
| generic | 6 years ago | |
| image | 6 years ago | |
| nand | 6 years ago | |
| patches-4.14 | 6 years ago | |
| tiny | 6 years ago | |
| Makefile | 6 years ago | |
| config-4.14 | 6 years ago | |
| modules.mk | 6 years ago | |