openwrt/target/linux/mediatek
Richard Huynh 9470160c35 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>
(cherry picked from commit 9f9477b275)
2022-03-21 13:11:56 +00:00
..
base-files mediatek: store random MAC address in U-Boot env on first boot 2022-01-23 20:20:47 +00:00
dts mediatek: Add support for Xiaomi Redmi Router AX6S 2022-03-21 13:11:56 +00:00
files-5.10/drivers mediatek: Add GD5F1GQ5xExxG to mtk-snand 2022-03-21 13:11:56 +00:00
image mediatek: Add support for Xiaomi Redmi Router AX6S 2022-03-21 13:11:56 +00:00
mt7622 mediatek: Add support for Xiaomi Redmi Router AX6S 2022-03-21 13:11:56 +00:00
mt7623 kernel: 5.10: allocate last level PTEs in high memory 2022-03-01 22:57:34 +00:00
mt7629 kernel: 5.10: consolidate mac80211 crypto options 2021-12-17 16:16:34 +01:00
patches-5.10 kernel: move parser_trx patches of custom magic to generic 2022-03-06 20:40:07 +01:00
Makefile mediatek: use CONFIG_TARGET_ROOTFS_PARTSIZE 2022-01-23 19:48:07 +00:00
modules.mk mediatek: build btmtkuart as a kernel module 2020-09-22 21:07:50 +08:00