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ramips: add support for Hongdian H7920 v40
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 MT7628NN
- Flash: 16 MB
- RAM: 128 MB
- Power: DC 5V-36V 1.5A
- Ethernet: 1x WAN [slot not install], 1x LAN (10/100 Mbps)
- Wireless radio: 802.11n 2.4g-only [antenna not install]
- LED:
System/Power (RUN): GPIO/37 active-low
Modem: GPIO/3 active-low
RF (Modem Signal): GPIO/2 active-low
- Button:
WPS / RESET: GPIO/11 active-low
- UART: 1x UART on PCB - 115200 8N1
- Serial / COM: 1X RS232/RS485 on board (GPIO/6 hi:RS485 lo:RS232)
- GPIO Watchdog: GPIO/0 mode=toggle timeout=1s
- Modem: 1x Built-in modem on board (Power: GPIO/4 active-high)
- PCIe: 1x miniPCIe for modem [slot not install]
- SIM Slots: 1x SIM Slots
Issue:
- Factory partition not store mac address on original firmware
Flash instruction:
Using SSH/Telnet:
1. Connect the board to the computer via RJ45 Ethernet
2. Login 192.168.8.1 with root password "superzxmn" (SSH Port 22, Telnet Port 5188)
3. Download openwrt firmware on the computer.
4. Use scp or sftp put firmware to board /tmp
5. Use command "mtd -r write openwrt-ramips-mt76x8-hongdian_h7920-v40-squashfs-sysupgrade.bin firmware"
to flash
Original Firmware Dump / More details:
https://blog.gov.cooking/archives/research-hongdian-h7920-v40-and-flash.html
Signed-off-by: Coia Prant <coiaprant@gmail.com>
Tested-by: Coia Prant <coiaprant@gmail.com>
(cherry picked from commit ebee946227)
Link: https://github.com/openwrt/openwrt/pull/19716
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Coia Prant
Hauke Mehrtens
parent
97a75a72e3
commit
05db6b3c5a
4 changed files with 203 additions and 1 deletions
171
target/linux/ramips/dts/mt7628an_hongdian_h7920-v40.dts
Normal file
171
target/linux/ramips/dts/mt7628an_hongdian_h7920-v40.dts
Normal file
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@ -0,0 +1,171 @@
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// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
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#include "mt7628an.dtsi"
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/input/input.h>
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#include <dt-bindings/leds/common.h>
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/ {
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compatible = "hongdian,h7920-v40", "mediatek,mt7628an-soc";
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model = "Hongdian H7920 v40";
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aliases {
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led-boot = &led_sys;
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led-failsafe = &led_sys;
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led-running = &led_sys;
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led-upgrade = &led_sys;
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};
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chosen {
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bootargs = "console=ttyS0,115200";
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};
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leds {
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compatible = "gpio-leds";
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led-rf {
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gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
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color = <LED_COLOR_ID_GREEN>;
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function = "rf";
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};
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led-net {
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gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
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color = <LED_COLOR_ID_GREEN>;
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function = LED_FUNCTION_MOBILE;
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};
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led_sys: led-sys {
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gpios = <&gpio 37 GPIO_ACTIVE_LOW>;
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color = <LED_COLOR_ID_GREEN>;
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function = LED_FUNCTION_POWER;
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default-state = "on";
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};
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};
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keys {
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compatible = "gpio-keys";
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reset {
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label = "reset";
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gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
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linux,code = <KEY_RESTART>;
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};
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};
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watchdog {
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compatible = "linux,wdt-gpio";
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gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
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hw_algo = "toggle";
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hw_margin_ms = <600>;
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always-running;
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};
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gpio-export {
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compatible = "gpio-export";
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gpio_modem_power {
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gpio-export,name = "modem_power";
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gpio-export,output = <0>;
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gpios = <&gpio 4 GPIO_ACTIVE_HIGH>;
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};
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gpio_serial_rs485_mode {
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gpio-export,name = "serial_rs485_mode";
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gpio-export,output = <0>;
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gpios = <&gpio 6 GPIO_ACTIVE_HIGH>;
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};
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};
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};
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&watchdog {
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status = "disabled";
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};
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&spi0 {
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status = "okay";
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flash@0 {
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compatible = "jedec,spi-nor";
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reg = <0>;
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spi-max-frequency = <40000000>;
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partitions {
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compatible = "fixed-partitions";
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#address-cells = <1>;
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#size-cells = <1>;
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partition@0 {
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label = "u-boot";
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reg = <0x0 0x30000>;
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read-only;
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};
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partition@30000 {
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label = "u-boot-env";
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reg = <0x30000 0x10000>;
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read-only;
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};
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partition@40000 {
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label = "factory";
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reg = <0x40000 0x10000>;
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read-only;
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nvmem-layout {
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compatible = "fixed-layout";
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#address-cells = <1>;
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#size-cells = <1>;
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eeprom_factory_0: eeprom@0 {
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reg = <0x0 0x400>;
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};
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macaddr_factory_28: macaddr@28 {
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reg = <0x28 0x6>;
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};
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};
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};
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partition@50000 {
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compatible = "denx,uimage";
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label = "firmware";
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reg = <0x50000 0xfb0000>;
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};
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};
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};
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};
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&state_default {
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gpio {
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groups = "i2s", "gpio", "refclk";
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function = "gpio";
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};
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};
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ðernet {
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nvmem-cells = <&macaddr_factory_28>;
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nvmem-cell-names = "mac-address";
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};
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&esw {
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mediatek,portmap = <0x3e>;
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mediatek,portdisable = <0x3c>;
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};
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&wmac {
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status = "okay";
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nvmem-cells = <&eeprom_factory_0>;
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nvmem-cell-names = "eeprom";
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};
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&uart1 {
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status = "okay";
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};
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&pcie {
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status = "okay";
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};
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@ -321,6 +321,15 @@ define Device/hiwifi_hc5861b
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endef
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TARGET_DEVICES += hiwifi_hc5861b
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define Device/hongdian_h7920-v40
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IMAGE_SIZE := 16064k
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DEVICE_VENDOR := Hongdian
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DEVICE_MODEL := H7920
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DEVICE_VARIANT := v40
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DEVICE_PACKAGES := kmod-usb2 kmod-usb-ohci kmod-usb-net-qmi-wwan kmod-usb-serial-option uqmi
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endef
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TARGET_DEVICES += hongdian_h7920-v40
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define Device/iptime_a3
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IMAGE_SIZE := 7936k
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UIMAGE_NAME := a3
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@ -107,7 +107,8 @@ ramips_setup_interfaces()
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"2:lan:2" "3:lan:1" "4:wan" "6@eth0"
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;;
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duzun,dm06|\
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glinet,gl-mt300n-v2)
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glinet,gl-mt300n-v2|\
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hongdian,h7920-v40)
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ucidef_add_switch "switch0" \
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"1:lan" "0:wan" "6@eth0"
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;;
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@ -277,6 +278,7 @@ ramips_setup_macs()
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totolink,a3)
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wan_mac=$(mtd_get_mac_binary u-boot 0x1fc40)
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;;
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hongdian,h7920-v40|\
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jotale,js76x8-8m|\
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jotale,js76x8-16m|\
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jotale,js76x8-32m|\
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@ -0,0 +1,20 @@
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#
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# Copyright (C) 2025 OpenWrt.org
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#
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. /lib/functions/uci-defaults.sh
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board_config_update
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board=$(board_name)
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case "$board" in
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hongdian,h7920-v40)
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ucidef_add_gpio_switch "modem_enable" "Modem power" "modem_power" "1"
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ucidef_add_gpio_switch "switch_serial_mode" "Switch RS232 to RS485" "serial_rs485_mode" "0"
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;;
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esac
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board_config_flush
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exit 0
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