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

The GL-MT1300 is a high-performance new generation pocket-sized router
that offers a powerful hardware and first-class cybersecurity protocol
with unique and modern design.

Specifications:
- SoC: MT7621A, Dual-Core @880MHz
- RAM: 256 MB DDR3
- Flash: 32 MB
- Ethernet: 3 x 10/100/1000: 2 x LAN + 1 x WAN
- Wireless: 1 x MT7615D Dual-Band 2.4GHz(400Mbps) + 5GHz(867Mbps)
- USB: 1 x USB 3.0 port
- Slot: 1 x MicroSD card slot
- Button: 1 x Reset button
- Switch: 1 x Mode switch
- LED: 1 x Blue LED + 1 x White LED

MAC addresses based on vendor firmware:
WAN : factory 0x4000
LAN : Mac from factory 0x4000 + 1
2.4GHz : factory 0x4
5GHz : Mac form factory 0x4 + 1

Flashing instructions:
1.Connect to one of LAN ports.
2.Set the static IP on the PC to 192.168.1.2.
3.Press the Reset button and power the device (do not release the button).
  After waiting for the blue led to flash 5 times, the white led will
  come on and release the button.
4.Browse the 192.168.1.1 web page and update firmware according to web
  tips.
5.The blue led will flash when the firmware is being upgraded.
6.The blue led stops blinking to indicate that the firmware upgrade is
  complete and U-Boot automatically starts the firmware.

Co-authored-by: Jan-Niklas Burfeind <git@aiyionpri.me>
fixed commit title

Co-authored-by: Jan-Niklas Burfeind <github@aiyionpri.me>
removed x86-legacy, added ramips-mt7621

Co-authored-by: Maximilian Baumgartner <aufhaxer@googlemail.com>

- [x] Must be flashable from vendor firmware
  - [x] Web interface
  - [ ] TFTP (untested, but possible according to OpenWrt wiki)
  - [ ] Other: <specify>
- [x] Must support upgrade mechanism
  - [x] Must have working sysupgrade
    - [x] Must keep/forget configuration (`sysupgrade [-n]`, `firstboot`)
  - [x] Gluon profile name matches autoupdater image name
        (`lua -e 'print(require("platform_info").get_image_name())'`)
- [x] Reset/WPS/... button must return device into config mode
- [x] Primary MAC address should match address on device label (or packaging)
      (https://gluon.readthedocs.io/en/latest/dev/hardware.html#notes)
  - When re-adding a device that was supported by an earlier version of Gluon, a
    factory reset must be performed before checking the primary MAC address, as
    the setting from the old version is not reset otherwise.
- Wired network
  - [x] should support all network ports on the device
  - [x] must have correct port assignment (WAN/LAN)
    - On devices supplied via PoE, there is usually no explicit WAN/LAN labeling on the hardware.
      The PoE input should be the WAN port in this case.
- Wireless network (if applicable)
  - [x] Association with AP must be possible on all radios
  - [x] Association with 802.11s mesh must work on all radios
  - [x] AP+mesh mode must work in parallel on all radios
- LED mapping
  - Power/system LED
    - [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
  - Switch port LEDs
    - [x] Should map to their respective port (or switch, if only one led present)
    - [x] Should show link state and activity

Hardware
--------
MediaTek MT7621AT
256M DDR3
32M SPI-NOR
MediaTek MT7603 2T2R 802.11n 2.4GHz
MediaTek MT7915 2T2R 802.11ax 5GHz

Not Working
-----------
 - Bluetooth (connected to UART3)

UART
----

UART is located in the lower left corner of the board. Pinout is

0 - 3V3 (don't connect)
1 - RX
2 - TX
3 - GND

Console is 115200 8N1.

Boot
----

1. Connect to the serial console and connect power.

2. Double-press ESC when prompted

3. Set the fdt address

   $ fdt addr $(fdtcontroladdr)

4. Remove the signature node from the control FDT

   $ fdt rm /signature

5. Transfer and boot the OpenWrt initramfs image to the device.
   Make sure to name the file C0A80114.img and have it reachable at
   192.168.1.1/24

   $ tftpboot; bootm

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

1. Connect to the booted device at 192.168.1.20 using username/password
   "ubnt".

2. Update the bootloader environment.

   $ fw_setenv devmode TRUE
   $ fw_setenv boot_openwrt "fdt addr \$(fdtcontroladdr);
     fdt rm /signature; bootubnt"
   $ fw_setenv bootcmd "run boot_openwrt"

3. Transfer the OpenWrt sysupgrade image to the device using SCP.

4. Check the mtd partition number for bs / kernel0 / kernel1

   $ cat /proc/mtd

5. Set the bootselect flag to boot from kernel0

   $ dd if=/dev/zero bs=1 count=1 of=/dev/mtdblock4

6. Write the OpenWrt sysupgrade image to both kernel0 as well as kernel1

   $ dd if=openwrt.bin of=/dev/mtdblock6
   $ dd if=openwrt.bin of=/dev/mtdblock7

7. Reboot the device. It should boot into 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'

The old bash-based parsing code was way too complex. Replace it with Lua.

Signed-off-by: Martin Weinelt <martin@darmstadt.freifunk.net>

including backport of mtd patches.

The general flash issue (32MB) was discussed here:
https://gist.github.com/dmke/d389bc364b3f73f525076eaee0019dc1
The resulting patch was the following:
http://lists.infradead.org/pipermail/linux-mtd/2016-December/070889.html

Another patch by nbd168 added the required mtd read operations for supporting ZBT-WG3526-32M:
https://github.com/lede-project/source/commit/22d982e#diff-3835f027e16e6416090c1833bc732af3

fixes build after 3ec63b8c

fixes #442

There is no wifi, so there is no bad wifi.

[Matthias Schiffer: rebase onto master]

[Matthias Schiffer: remove patch "ramips: simplify ubnt-erx-sfp device
definition", as it depends on other patches that have not been backported]