openwrt/package/boot/uboot-envtools/files/mediatek_mt7622
Richard Huynh 9f9477b275 mediatek: Add support for Xiaomi Redmi Router AX6S
Also known as the "Xiaomi Router AX3200" in western markets,
but only the AX6S is widely installation-capable at this time.

SoC: MediaTek MT7622B
RAM: DDR3 256 MiB (ESMT M15T2G16128A)
Flash: SPI-NAND 128 MiB (ESMT F50L1G41LB or Gigadevice GD5F1GQ5xExxG)
WLAN: 2.4/5 GHz 4T4R
2.4 GHz: MediaTek MT7622B
5 GHz: MediaTek MT7915E
Ethernet: 4x 10/100/1000 Mbps
Switch: MediaTek MT7531B
LEDs/Keys: 2/2 (Internet + System LED, Mesh button + Reset pin)
UART: Marked J1 on board VCC RX GND TX, beginning from "1". 3.3v, 115200n8
Power: 12 VDC, 1.5 A

Notes:
U-Boot passes through the ethaddr from uboot-env partition,
but also has been known to reset it to a generic mac address
hardcoded in the bootloader.

However, bdata is also populated with the ethernet mac addresses,
but is also typically never written to. Thus this is used instead.

Installation:
1. Flash stock Xiaomi "closed beta" image labelled
'miwifi_rb03_firmware_stable_1.2.7_closedbeta.bin'.
(MD5: 5eedf1632ac97bb5a6bb072c08603ed7)

2. Calculate telnet password from serial number and login

3. Execute commands to prepare device
nvram set ssh_en=1
nvram set uart_en=1
nvram set boot_wait=on
nvram set flag_boot_success=1
nvram set flag_try_sys1_failed=0
nvram set flag_try_sys2_failed=0
nvram commit

4. Download and flash image
On computer:
python -m http.server
On router:
cd /tmp
wget http://<IP>:8000/factory.bin
mtd -r write factory.bin firmware

Device should reboot at this point.

Reverting to stock:
Stock Xiaomi recovery tftp that accepts their signed images,
with default ips of 192.168.31.1 + 192.168.31.100.
Stock image should be renamed to tftp server ip in hex (Eg. C0A81F64.img)
Triggered by holding reset pin on powerup.

A simple implementation of this would be via dnsmasq's
dhcp-boot option or using the vendor's (Windows only)
recovery tool available on their website.

Signed-off-by: Richard Huynh <voxlympha@gmail.com>
2022-03-20 18:33:39 +00:00

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#
# Copyright (C) 2021 OpenWrt.org
#
[ -e /etc/config/ubootenv ] && exit 0
touch /etc/config/ubootenv
. /lib/uboot-envtools.sh
. /lib/functions.sh
board=$(board_name)
case "$board" in
linksys,e8450-ubi)
ubootenv_add_uci_config "/dev/ubi0_0" "0x0" "0x1f000" "0x1f000" "1"
ubootenv_add_uci_config "/dev/ubi0_1" "0x0" "0x1f000" "0x1f000" "1"
;;
bananapi,bpi-r64)
. /lib/upgrade/common.sh
export_bootdevice
export_partdevice rootdev 0
case "$rootdev" in
mmc*)
local envdev=$(find_mmc_part "ubootenv" $rootdev)
ubootenv_add_uci_config "$envdev" "0x0" "0x80000" "0x80000" "1"
ubootenv_add_uci_config "$envdev" "0x80000" "0x80000" "0x80000" "1"
;;
*)
ubootenv_add_uci_config "/dev/ubi0_0" "0x0" "0x1f000" "0x1f000" "1"
ubootenv_add_uci_config "/dev/ubi0_1" "0x0" "0x1f000" "0x1f000" "1"
;;
esac
;;
buffalo,wsr-2533dhp2)
ubootenv_add_uci_config "/dev/mtd3" "0x0" "0x1000" "0x20000"
;;
ruijie,rg-ew3200gx-pro)
ubootenv_add_uci_config "/dev/mtd3" "0x0" "0x20000" "0x20000"
;;
ubnt,unifi-6-lr-ubootmod)
ubootenv_add_uci_config "/dev/mtd2" "0x0" "0x4000" "0x10000"
;;
xiaomi,redmi-router-ax6s)
ubootenv_add_uci_config "/dev/mtd3" "0x0" "0x10000" "0x40000"
;;
esac
config_load ubootenv
config_foreach ubootenv_add_app_config ubootenv
exit 0