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Petr Štetiar 6009b3fd58 ar71xx: ubnt-m-xw: Fix factory image flashing using TFTP recovery
This is backport of the same functionality in ath79, from commit
 d42a7c469 ("ath79: ubnt-m-xw: Fix factory image flashing using TFTP
             recovery method")

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 3801500 bytes
 Firmware Version: XW.ar934x.v6.0.4-42.OpenWrt-r9766+2-be42e44
 Setting U-Boot environment variables
 Un-Protected 1 sectors
 Erasing Flash.... done

Patch provided by AREDN[3] project, tested on Bullet M2 XW.

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>
2019-04-08 18:37:04 +02:00
.github build: Update README & github help 2018-07-08 09:41:53 +01:00
config mvebu: make bootfs size for sdcard image configurable 2019-04-06 16:31:10 +02:00
include kernel: bump 4.19 to 4.19.34 2019-04-08 14:53:39 +02:00
package uboot-envtools: imx6: Add support for Toradex Apalis board family 2019-04-08 18:37:03 +02:00
scripts IB: fix generating .profile.mk for profiles without metadata 2019-03-27 22:53:14 +01:00
target ar71xx: ubnt-m-xw: Fix factory image flashing using TFTP recovery 2019-04-08 18:37:04 +02:00
toolchain glibc: update to latest 2.27 commit [BZ #22964] 2019-04-08 16:07:11 +02:00
tools tools: cbootimage: depend on automake 2019-04-07 15:25:28 +02:00
.gitattributes add .gitattributes to prevent the git autocrlf option from messing with CRLF/LF in files 2012-05-08 13:30:49 +00:00
.gitignore .gitignore: add .project & .cproject for eclipse users 2018-01-17 11:07:17 +01:00
BSDmakefile add missing copyright header 2007-02-26 01:05:09 +00:00
Config.in merge: base: update base-files and basic config 2017-12-08 19:41:18 +01:00
feeds.conf.default feeds: switch git.lede-project.org URLs to git.openwrt.org 2018-01-16 16:59:22 +01:00
LICENSE finally move buildroot-ng to trunk 2016-03-20 17:29:15 +01:00
Makefile build: Unset CDPATH to avoid problems 2018-08-25 11:10:28 +02:00
README build: README punctuation pendantry 2018-07-08 12:05:16 +01:00
rules.mk librpc: remove package 2019-01-22 13:29:46 +01:00

  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 -----------------------------------------------------

This is the buildsystem for the OpenWrt Linux distribution.

To build your own firmware you need a Linux, BSD or MacOSX system (case
sensitive filesystem required). Cygwin is unsupported because of the lack
of a case sensitive file system.

You need gcc, binutils, bzip2, flex, python, perl, make, find, grep, diff,
unzip, gawk, getopt, subversion, libz-dev and libc headers installed.

1. Run "./scripts/feeds update -a" to obtain all the latest package definitions
defined in feeds.conf / feeds.conf.default

2. Run "./scripts/feeds install -a" to install symlinks for all obtained
packages into package/feeds/

3. Run "make menuconfig" to select your preferred configuration for the
toolchain, target system & firmware packages.

4. Run "make" to build your firmware. This will download all sources, build
the cross-compile toolchain and then cross-compile the Linux kernel & all
chosen applications for your target system.

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