ramips: add support for Hongdian H8850 v20

This is an industrial 4G router equipped with OpenWrt SNAPSHOT OEM
customized version

WARNING: The original firmware device tree is modified from evb
boards, and the device tree name is evb board. This submitted device
tree is a modified version, which deletes the non-this-device parts
and adds GPIO watchdog.

Specification:
- SoC: MediaTek MT7628DAN
- Flash: 16 MB
- RAM: 64 MB
- Power: DC 5V-36V 1.5A
- Ethernet: 1x WAN/LAN, 3x LAN (10/100 Mbps)
- Wireless radio: 802.11n 2.4g-only
- LED:
  System/Power (PWR): Always Off
  Modem (NET): GPIO/3 active-low
  LAN: Always On
  RF (Modem Signal): GPIO/2 active-low
  WIFI: GPIO/44 active-low
- Button:
  WPS / RESET: GPIO/11 active-low
- UART: 1x UART on PCB - 115200 8N1
- GPIO Watchdog: GPIO/0 mode=toggle timeout=1s
- Modem: 1x Built-in modem on board (Power: GPIO/4 active-high)
- SIM Slots: 1x SIM Slots

Issue:
- Factory partition not store mac address on original firmware

Flash instruction:
Using TTL:
1. Connect the board to the computer via TTL.
2. Enter original firmware failsafe mode.
3. Use wget download firmware to board /tmp
4. Use command "mtd -r write openwrt-ramips-mt76x8-hongdian_h8850-v20-squashfs-sysupgrade.bin firmware"
   to flash

Original Firmware Dump / More details:
https://blog.gov.cooking/archives/research-hongdian-h8850-v20-and-flash.html

Signed-off-by: Coia Prant <coiaprant@gmail.com>
Tested-by: Coia Prant <coiaprant@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/20259
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Coia Prant 2025-10-01 18:04:26 +08:00 committed by Hauke Mehrtens
parent f891609fab
commit 23a070dfb1
4 changed files with 179 additions and 8 deletions

View File

@ -0,0 +1,157 @@
// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
#include "mt7628an.dtsi"
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>
#include <dt-bindings/leds/common.h>
/ {
compatible = "hongdian,h8850-v20", "mediatek,mt7628an-soc";
model = "Hongdian H8850 v20";
aliases {
led-boot = &led_net;
led-failsafe = &led_net;
led-running = &led_net;
led-upgrade = &led_net;
};
chosen {
bootargs = "console=ttyS0,115200";
};
leds {
compatible = "gpio-leds";
led-rf {
gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
color = <LED_COLOR_ID_GREEN>;
function = "rf";
};
led_net: led-net {
gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
color = <LED_COLOR_ID_GREEN>;
function = LED_FUNCTION_MOBILE;
};
led-wifi {
gpios = <&gpio 44 GPIO_ACTIVE_LOW>;
color = <LED_COLOR_ID_GREEN>;
function = LED_FUNCTION_WLAN;
linux,default-trigger = "phy0tpt";
};
};
keys {
compatible = "gpio-keys";
reset {
label = "reset";
gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
linux,code = <KEY_RESTART>;
};
};
watchdog {
compatible = "linux,wdt-gpio";
gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
hw_algo = "toggle";
hw_margin_ms = <600>;
always-running;
};
gpio-export {
compatible = "gpio-export";
gpio_modem_power {
gpio-export,name = "modem_power";
gpio-export,output = <1>;
gpios = <&gpio 4 GPIO_ACTIVE_HIGH>;
};
};
};
&watchdog {
status = "disabled";
};
&spi0 {
status = "okay";
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <40000000>;
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
partition@0 {
label = "u-boot";
reg = <0x0 0x30000>;
read-only;
};
partition@30000 {
label = "u-boot-env";
reg = <0x30000 0x10000>;
read-only;
};
partition@40000 {
label = "factory";
reg = <0x40000 0x10000>;
read-only;
nvmem-layout {
compatible = "fixed-layout";
#address-cells = <1>;
#size-cells = <1>;
eeprom_factory_0: eeprom@0 {
reg = <0x0 0x400>;
};
macaddr_factory_4: macaddr@4 {
reg = <0x4 0x6>;
};
};
};
partition@50000 {
compatible = "denx,uimage";
label = "firmware";
reg = <0x50000 0xfb0000>;
};
};
};
};
&state_default {
gpio {
groups = "i2s", "i2c", "spi cs1", "gpio", "perst", "refclk", "wdt", "p4led_an", "wled_an";
function = "gpio";
};
};
&ethernet {
nvmem-cells = <&macaddr_factory_4>;
nvmem-cell-names = "mac-address";
};
&esw {
mediatek,portmap = <0x3e>;
mediatek,portdisable = <0x30>;
};
&wmac {
status = "okay";
nvmem-cells = <&eeprom_factory_0>;
nvmem-cell-names = "eeprom";
};

View File

@ -373,6 +373,15 @@ define Device/hongdian_h7920-v40
endef
TARGET_DEVICES += hongdian_h7920-v40
define Device/hongdian_h8850-v20
IMAGE_SIZE := 16064k
DEVICE_VENDOR := Hongdian
DEVICE_MODEL := H8850
DEVICE_VARIANT := v20
DEVICE_PACKAGES := kmod-usb2 kmod-usb-ohci kmod-usb-net-qmi-wwan kmod-usb-serial-option uqmi
endef
TARGET_DEVICES += hongdian_h8850-v20
define Device/iptime_a3
IMAGE_SIZE := 7936k
UIMAGE_NAME := a3

View File

@ -121,6 +121,15 @@ ramips_setup_interfaces()
ucidef_add_switch "switch0" \
"0:lan" "1:lan" "4:wan" "6@eth0"
;;
hongdian,h8850-v20|\
keenetic,kn-1112|\
keenetic,kn-1212|\
keenetic,kn-1613|\
keenetic,kn-1713|\
motorola,mwr03)
ucidef_add_switch "switch0" \
"1:lan" "2:lan" "3:lan" "0:wan" "6@eth0"
;;
iptime,a3|\
totolink,a3)
ucidef_add_switch "switch0" \
@ -140,14 +149,6 @@ ramips_setup_interfaces()
ucidef_add_switch "switch0" \
"1:lan" "2:lan" "0:wan" "6@eth0"
;;
keenetic,kn-1112|\
keenetic,kn-1212|\
keenetic,kn-1613|\
keenetic,kn-1713|\
motorola,mwr03)
ucidef_add_switch "switch0" \
"1:lan" "2:lan" "3:lan" "0:wan" "6@eth0"
;;
keenetic,kn-3211)
ucidef_add_switch "switch0" \
"2:lan" "6@eth0"
@ -286,6 +287,7 @@ ramips_setup_macs()
;;
duzun,dm06|\
hongdian,h7920-v40|\
hongdian,h8850-v20|\
netgear,r6020|\
netgear,r6080|\
netgear,r6120|\

View File

@ -13,6 +13,9 @@ hongdian,h7920-v40)
ucidef_add_gpio_switch "modem_enable" "Modem power" "modem_power" "1"
ucidef_add_gpio_switch "switch_serial_mode" "Switch RS232 to RS485" "serial_rs485_mode" "0"
;;
hongdian,h8850-v20)
ucidef_add_gpio_switch "modem_enable" "Modem power" "modem_power" "1"
;;
teltonika,rut200|\
teltonika,rut241)
ucidef_add_gpio_switch "digital_output" "Digital output" "digital_output" "0"