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Device specification
SoC Type: MediaTek MT7986B, Cortex-A53, 64-bit 1.6GHz Quad Core
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 MT7975
WLAN 5g: MediaTek MT7975
LEDs: All White(probably)
Buttons: 4 (Reset,ledswitch,wps,wlan),
USB ports: 1 (USB 3.0)
Power: 12 VDC, 2.0 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
CPU BLOCK HERE LAN PORTS HERE
Installation (UART)
Note: There might be methods without UART possible soon.
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: Emre Yavuzalp <emreyavuzalp2@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/20630
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>