lijiext/openwrt

mediatek: add support for BUFFALO WSR-3000AX4P
BUFFALO WSR-3000AX4P is a 2.4/5 GHz band 11ax (Wi-Fi 6) router, based on
MT7981B.
Specification:

SoC             : MediaTek MT7981B
RAM             : DDR4 512 MiB (ESMT M16U4G16256A-KJBG)
Flash           : SPI-NAND 128 MiB (Winbond W25N01GVZEIG)
WLAN            : 2.4/5 GHz 2T2R (MediaTek MT7981B (SoC))
Ethernet        : 4x 10/100/1000 Mbps
switch        : MediaTek MT7531A

LEDs/Keys (GPIO): 6x/4x
UART            : through-hole on PCB (J1)
assignment    : 3.3V, GND, TX, RX from tri-angle marking
settings      : 115200n8

Power           : 12 VDC, 1.5 A (Max. 14.4 W)

Flash instruction using initramfs image:

Prepare a TFTP server with 192.168.11.2
Rename initramfs image to “linux.ubi-recovery” and put it to the TFTP
directory
Hold the “AOSS” button and power on WSR-3000AX4P, release after 7~
seconds
The bootloader automatically downloads the initramfs image and boots
with it
After booting, upload a sysupgrade image to the device and perform
sysupgrade with it
Wait ~100 seconds to complete flashing

Reverting to stock image:

Download a official firmware and decrypt it by buffalo-enc
example:
  buffalo-enc -i <official .bin> -o fw.dec -d -O 0xC8 -l

Upload the decrypted image to the device

Flash the image to the UBI in “ubi_kernel” partition on the device
example:
  . /lib/upgrade/common.sh
  . /lib/upgrade/nand.sh
  CI_UBIPART=”ubi_kernel” nand_do_flash_file fw.dec

Reboot the device
reboot

Notes:

WSR-3000AX4P has 2x OS images (“ubi”/“Kernel2”), but the second one
is only for backup and not used for booting.
image handling on the bootloader:

“ubi” is broken     : “Kernel2” –(copy)–> “ubi”
“Kernel2” is broken : “ubi” –(copy)–> “Kernel2”
“ubi” != “Kernel2”  :
boot_select=0: “ubi” –(copy)–> “Kernel2”
boot_select=1: “Kernel2” –(copy)–> “ubi”, set boot_select to ‘0’

MAC Addresses:
LAN   : EC:5A:31:xx:xx:50 (board_data, “mac” (text))
WAN   : EC:5A:31:xx:xx:50
2.4GHz: EC:5A:31:xx:xx:52
5GHz  : EC:5A:31:xx:xx:59
Signed-off-by: INAGAKI Hiroshi musashino.open@gmail.com
Link: https://github.com/openwrt/openwrt/pull/22587
Signed-off-by: Hauke Mehrtens hauke@hauke-m.de

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