mediatek: add support for TP-Link Archer AX80v1(US/RU/CA)

mediatek: add support for TP-Link Archer AX80v1(US/RU/CA)

This commit adds support for TP-Link Archer AX80v1(US/RU/CA).

Device specification
SoC Type:   MediaTek MT7986AV, Cortex-A53, 64-bit
RAM:        ESMT M15T4G16256 (512MB)
Flash:      ESMT F50L1G41LB (128 MB)
Ethernet:   MediaTek MT7531AE + 2.5GbE MaxLinear GPY211C0VC (SLNW8)
Ethernet:   1x2.5Gbe (WAN/LAN 2.5Gbps), 4xGbE (WAN/LAN 1Gbps, LAN1, LAN2, LAN3)
WLAN 2g:    MediaTek MT7976GN
WLAN 5g:    MediaTek MT7976AN
LEDs:       1 red,1 green,1 blue status LEDs,

Buttons:    4 (Reset,ledswitch,wps,wlan),
USB ports:  1 (USB 3.0)
Power:      12 VDC, 3,3 A
Connector:  Barrel
Bootloader: Main U-Boot - U-Boot 2022.01-rc4. Additionally, both UBI
            slots contain "seconduboot" (also U-Boot 2022.01-rc4)
Serial console (UART)
                            V
+-------+-------+-------+-------+
| +3.3V |  GND  |  TX   |  RX   |
+---+---+-------+-------+-------+
    |
    +--- Don't connect

Installation (UART)
Place OpenWrt initramfs image on tftp server with IP 192.168.1.2

Attach UART, switch on the router and interrupt the boot process by pressing 'Ctrl-C'

Load and run OpenWrt initramfs image:

      tftpboot initramfs-kernel.bin
      bootm

!!Attention!! is very important! After entering OpenWrt, please set / update the environment variables:

fw_setenv bootargs "ubi.mtd=ubi0 console=ttyS0,115200n1 loglevel=8 earlycon=uart8250,mmio32,0x11002000 init=/etc/preinit"
fw_setenv mtdids "spi-nand0=spi-nand0"
fw_setenv mtdparts "spi-nand0:2M(boot),1M(u-boot-env),50M(ubi0),50M(ubi1),8M(userconfig),4M(tp_data),8M(mali_data)"
fw_setenv tp_boot_idx 0

Run 'sysupgrade -n' with the sysupgrade OpenWrt image from console or Luci WebUI.

Recovery

Press Reset button and power on the router
Navigate to U-Boot recovery web server (192.168.1.1) and upload the OEM firmware

Stock layout

0x000000000000-0x000000200000 : "boot"
0x000000200000-0x000000300000 : "u-boot-env"
0x000000300000-0x000003500000 : "ubi0"
0x000003500000-0x000006700000 : "ubi1"
0x000006700000-0x000006f00000 : "userconfig"
0x000006f00000-0x000007300000 : "tp_data"
0x000007300000-0x000007B00000 : "mali_data"

ubi0/ubi1 format
U-Boot at boot checks that all volumes are in place:

+-------------------------------+
| Volume Name: uboot   Vol ID: 0|
| Volume Name: kernel  Vol ID: 1|
| Volume Name: rootfs  Vol ID: 2|
+-------------------------------+
MAC addresses
+---------+-------------------+-----------+
| label   | 00:eb:xx:xx:xx:be | label     |
| LAN     | 00:eb:xx:xx:xx:be | label     |
| WAN     | 00:eb:xx:xx:xx:bf | label+1   |
| WLAN 2g | 00:eb:xx:xx:xx:be | label     |
| WLAN 5g | 00:eb:xx:xx:xx:bd | label-1   |
+---------+-------------------+-----------+
label MAC address was found in UBI partition "tp_data", file "default-mac".
OEM wireless eeprom is also there (file "MT7986_EEPROM.bin").

Signed-off-by: Sergey Shlukov <ichizakurain@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17753
(cherry picked from commit 8b24289a5267e486abd9ccbf4b4ad82f14d545ae)
Link: https://github.com/openwrt/openwrt/pull/19050
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>