* ath79-generic: add support for Onion Omega

support was previously dropped in
commit 45c84a11 ("ar71xx: drop target")

* fixup! ath79-generic: add support for Onion Omega

* fixup! ath79-generic: add support for Onion Omega

- [x] must be flashable from vendor firmware
  - [ ] webinterface
  - [ ] tftp
  - [x] other: Console port available. Manufacturer specific cable required.
        Tutorial in OpenWRT commit message https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=c6e972c8772a628a1a2f2e5590d7c6f4acef9ab0
- [x] must support upgrade mechanism
  - [x] must have working sysupgrade
    - [x] must keep/forget configuration (if applicable)
      *think `sysupgrade [-n]` or `firstboot`*
  - [x] must have working autoupdate
        root@Aruba-AP-303H:~# lua -e 'print(require("platform_info").get_image_name())'
        aruba-ap-303h
- [x] reset/wps/phone button must return device into config mode
- [x] primary mac should match address on device label (or packaging) (https://gluon.readthedocs.io/en/latest/dev/hardware.html#notes)
- wired network
  - [x] should support all network ports on the device
  - [x] must have correct port assignment (WAN/LAN)
- wifi (if applicable)
  - [x] association with AP must be possible on all radios
  - [x] association with 802.11s mesh must be working on all radios
  - [x] ap/mesh mode must work in parallel on all radios
- led mapping
  - power/sys led (_critical, because led definitions are setup on firstboot only_)
    - [x] lit while the device is on
    - [x] should display config mode blink sequence
(https://gluon.readthedocs.io/en/latest/features/configmode.html)
  - radio leds
    - [x] should map to their respective radio
    - [x] should show activity
  - switchport leds
    - [x] should map to their respective port (or switch, if only one led present)
    - [x] should show link state and activity
- outdoor devices only
  - [ ] added board name to `is_outdoor_device` function in `package/gluon-core/luasrc/usr/lib/lua/gluon/platform.lua`
- ToDo (upstream):
  - enable PoE pass through on interface E3
        system.poe_passthrough=gpio_switch
        system.poe_passthrough.name='PoE Passthrough'
        system.poe_passthrough.gpio_pin='446'
        system.poe_passthrough.value='0' (0 is active)

Co-authored-by: Michael Wyraz <michael.wyraz@evermind.de>

TP-Link RE200 v2 is a wireless range extender with Ethernet and 2.4G and 5G
WiFi with internal antennas. It's based on MediaTek MT7628AN+MT7610EN.

Specifications
--------------

- MediaTek MT7628AN (580 Mhz)
- 64 MB of RAM
- 8 MB of FLASH
- 2T2R 2.4 GHz and 1T1R 5 GHz
- 1x 10/100 Mbps Ethernet
- UART header on PCB (57600 8n1)
- 8x LED (GPIO-controlled), 2x button

There are 2.4G and 5G LEDs in red and green which are controlled
separately.

MAC addresses
-------------

The MAC address assignment matches stock firmware, i.e.:
LAN : *:0D
2.4G: *:0E
5G  : *:0F

Installation
------------

Web Interface
-------------

It is possible to upgrade to OpenWrt via the web interface. Simply flash
the -factory.bin from OEM. In contrast to a stock firmware, this will not
overwrite U-Boot.

VoCores aren't exactly useful mesh nodes except for experimentation.
They certainly aren't worth maintaining a whole target, in particular
one that has a WLAN driver not used by any other target.

Signed-off-by: David Bauer <mail@david-bauer.net>

Specifications:

- CPU: MediaTek MT7628AN (580MHz)
- Flash: 16MB
- RAM: 64MB DDR2
- 2.4 GHz: IEEE 802.11b/g/n with Integrated LNA and PA
- Antennas: 4x external single band antennas
- WAN: 1x 10/100M
- LAN: 2x 10/100M
- LEDs: 2x yellow/blue. Programmable (labelled as power on case)
                      - Non-programmable (shows WAN activity)
- Button: Reset

How to install:

1- Use OpenWRTInvasion to gain telnet and ftp access.
2- Push openwrt firmware to /tmp/ using ftp.
3- Connect to router using telnet. (IP: 192.168.31.1 -
   Username: root - No password)
4- Use command "mtd -r write /tmp/firmware.bin OS1" to flash into
   the router..
5- It takes around 2 minutes. After that router will restart itself
   to OpenWrt.

Specifications:

- SoC:      MediaTek MT7621
- Flash:    16 MiB NOR SPI
- RAM:      128 MiB DDR3
- Ethernet: 3x 10/100/1000 Mbps (switched, 2xLAN + WAN)
- WIFI0:    MT7603E 2.4GHz 802.11b/g/n
- WIFI1:    MT7612E 5GHz 802.11ac
- Antennas: 4x external (2 per radio), non-detachable
- LEDs:     Programmable "power" LED (two-coloured, yellow/blue)
            Non-programmable "internet" LED (shows WAN activity)
- Buttons:  Reset

Installation:

Bootloader won't accept any serial input unless "boot_wait" u-boot
environment variable is changed to "on".

Vendor firmware won't accept any serial input until "uart_en" is
set to "1".

Using the https://github.com/acecilia/OpenWRTInvasion exploit you
can gain access to shell to enable these options:

To enable uart keyboard actions - 'nvram set uart_en=1'
To make uboot delay boot work - 'nvram set boot_wait=on'
Set boot delay to 5 - 'nvram set bootdelay=5'

Then run 'nvram commit' to make the changes permanent.

Once in the shell (following the OpenWRTInvasion instructions) you
can then run the following to flash OpenWrt and then reboot:

'cd /tmp; curl https://downloads.openwrt.org/...-sysupgrade.bin
  --output firmware.bin; mtd -e OS1 -r write firmware.bin OS1'

These config changes are not necessary anymore, as it's now the default
behavior.

Ref: https://github.com/freifunk-gluon/gluon/pull/2235#issuecomment-859654947


Signed-off-by: David Bauer <mail@david-bauer.net>

All targets now use OpenWrt device abstraction. Thus, all targets now
can be built using a per-device RootFS.

Signed-off-by: David Bauer <mail@david-bauer.net>

Signed-off-by: David Bauer <mail@david-bauer.net>

Signed-off-by: Jan-Tarek Butt <tarek@ring0.de>
Signed-off-by: David Bauer <mail@david-bauer.net>

Upstream removed the factory images for the Archer C20 v1 as they
potentially brick the device. Remove them from Gluon to avoid build
failures on the next OpenWrt 19.07 bump.

Signed-off-by: David Bauer <mail@david-bauer.net>

This device is a dual 5GHz device. It is recommended to manually change the
radio of the first device to the lower 5GHz channels and the second radio
to the upper 5GHz channels