This patch works around an issue where reboot would cause the AP
to power down and not reboot.
The ipq4019 restart controller reboot causes the system
to power down and not recover. Fix is to disable the restart
controller in the device tree and the device reverts to
using the watchdog to perform the reset.
The real problem is due to the buggy bootloader that ships
with the device. Steve Glennon reported in the PR for this
patch: <https://github.com/openwrt/openwrt/pull/2009> that:
"the problem was due to a bad u-boot that ships with the device.
Using the u-boot that comes with 3.5.5.3 EnGenius factory
software now allows the old code (using the do_msm_reboot)
to reboot successfully.
On to the bad news:
Well 3.5.5.3 is a bad path. Finally managed to recover. You
CANNOT use prior EnGenius firmware to downgrade.
Findings:
* They now password protect the serial console with a new, unkown
password.
* They changed the protection on their walled-garden. I have to
use the ssh admin@ip /bin/sh --login to get out of their
walled-garden.
* Attempts to flash the original 3.0.0 or 3.0.1 EnGenius firmware
fail through the UI and sysupgrade. Their firmware update GUI now
seem to detect regular openwrt images, but they fail to flash
Attempts to flash a normal OpenWrt image with sysupgrade fail.
[..]
Attempts to sysupgrade with EnGenius firmware fail with the same
"mandatory section(s) missing" error, so you cannot downgrade to
3.0.0 or 3.0.1."
Signed-off-by: Steve Glennon <s.glennon@cablelabs.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com> [added valuable
findings from github discussion]
Hardware
--------
CPU: Qualcomm IPQ4018
RAM: 256M
FLASH: 32M SPI NOR W25Q256
ETH: QCA8075
WiFi2: IPQ4018 2T2R 2SS b/g/n
WiFi5: IPQ4018 2T2R 2SS n/ac
LED: - Power amber
- LAN1(PoE) green
- LAN2 green
- Wi-Fi 2.4GHz green
- Wi-Fi 5GHz green
BTN: - WPS
UART: 115200n8 3.3V J1
VCC(1) - GND(2) - TX(3) - RX(4)
Added basic support to get the device up and running for a sysupgrade
image only.
There is currently no way back to factory firmware, so this is a one-way
street to OpenWRT.
Install from factory condition is convoluted, and may brick your device:
1) Enable SSH and disable the CLI on the factory device from the web user
interface (Management->Advanced)
2) Reboot the device
3) Override the default, limited SSH shell:
a) Get into the ssh shell:
ssh admin@192.168.1.1 /bin/sh --login
b) Change the dropbear script to disable the limited shell. At the
empty command prompt type:
sed -i '/login_ssh/s/^/#/g’ dropbear
/etc/init.d/dropbear restart
exit
4) ssh in to a (now-) normal OpenWRT SSH session
5) Flash your built image
a) scp openwrt-ipq40xx-engenius_ens620ext-squashfs-sysupgrade.bin
admin@192.168.1.1:/tmp/
b) ssh admin@192.168.1.1
c) sysupgrade -n
/tmp/openwrt-ipq40xx-engenius_ens620ext-squashfs-sysupgrade.bin
6) After flash completes (it may say "Upgrade failed" followed by
"Upgrade completed") and device reboots, log in to newly flashed
system. Note you will now need to ssh as root rather than admin.
Signed-off-by: Steve Glennon <s.glennon@cablelabs.com>
[whitespace fixes, reordered partitions, removed rng node from 4.14,
fixed 901-arm-boot-add-dts-files.patch]
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Steve Glennon