[openwrt/openwrt] ramips: add support for Hongdian H7920 v40
LEDE Commits
lede-commits at lists.infradead.org
Thu Aug 21 13:46:28 PDT 2025
hauke pushed a commit to openwrt/openwrt.git, branch openwrt-24.10:
https://git.openwrt.org/05db6b3c5aa1eebbaf510f9954f2c7d2bb7a0963
commit 05db6b3c5aa1eebbaf510f9954f2c7d2bb7a0963
Author: Coia Prant <coiaprant at gmail.com>
AuthorDate: Sat Aug 9 01:35:57 2025 +0800
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 at gmail.com>
Tested-by: Coia Prant <coiaprant at gmail.com>
(cherry picked from commit ebee9462273d3d30dbd29434e4f715ce39f80efc)
Link: https://github.com/openwrt/openwrt/pull/19716
Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
.../ramips/dts/mt7628an_hongdian_h7920-v40.dts | 171 +++++++++++++++++++++
target/linux/ramips/image/mt76x8.mk | 9 ++
.../mt76x8/base-files/etc/board.d/02_network | 4 +-
.../mt76x8/base-files/etc/board.d/03_gpio_switches | 20 +++
4 files changed, 203 insertions(+), 1 deletion(-)
diff --git a/target/linux/ramips/dts/mt7628an_hongdian_h7920-v40.dts b/target/linux/ramips/dts/mt7628an_hongdian_h7920-v40.dts
new file mode 100644
index 0000000000..76c395c382
--- /dev/null
+++ b/target/linux/ramips/dts/mt7628an_hongdian_h7920-v40.dts
@@ -0,0 +1,171 @@
+// 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,h7920-v40", "mediatek,mt7628an-soc";
+ model = "Hongdian H7920 v40";
+
+ aliases {
+ led-boot = &led_sys;
+ led-failsafe = &led_sys;
+ led-running = &led_sys;
+ led-upgrade = &led_sys;
+ };
+
+ 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 {
+ gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+ color = <LED_COLOR_ID_GREEN>;
+ function = LED_FUNCTION_MOBILE;
+ };
+
+ led_sys: led-sys {
+ gpios = <&gpio 37 GPIO_ACTIVE_LOW>;
+ color = <LED_COLOR_ID_GREEN>;
+ function = LED_FUNCTION_POWER;
+ default-state = "on";
+ };
+ };
+
+ 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 = <0>;
+ gpios = <&gpio 4 GPIO_ACTIVE_HIGH>;
+ };
+
+ gpio_serial_rs485_mode {
+ gpio-export,name = "serial_rs485_mode";
+ gpio-export,output = <0>;
+ gpios = <&gpio 6 GPIO_ACTIVE_HIGH>;
+ };
+ };
+};
+
+&watchdog {
+ status = "disabled";
+};
+
+&spi0 {
+ status = "okay";
+
+ flash at 0 {
+ compatible = "jedec,spi-nor";
+ reg = <0>;
+ spi-max-frequency = <40000000>;
+
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition at 0 {
+ label = "u-boot";
+ reg = <0x0 0x30000>;
+ read-only;
+ };
+
+ partition at 30000 {
+ label = "u-boot-env";
+ reg = <0x30000 0x10000>;
+ read-only;
+ };
+
+ partition at 40000 {
+ label = "factory";
+ reg = <0x40000 0x10000>;
+ read-only;
+
+ nvmem-layout {
+ compatible = "fixed-layout";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ eeprom_factory_0: eeprom at 0 {
+ reg = <0x0 0x400>;
+ };
+
+ macaddr_factory_28: macaddr at 28 {
+ reg = <0x28 0x6>;
+ };
+ };
+ };
+
+ partition at 50000 {
+ compatible = "denx,uimage";
+ label = "firmware";
+ reg = <0x50000 0xfb0000>;
+ };
+ };
+ };
+};
+
+&state_default {
+ gpio {
+ groups = "i2s", "gpio", "refclk";
+ function = "gpio";
+ };
+};
+
+ðernet {
+ nvmem-cells = <&macaddr_factory_28>;
+ nvmem-cell-names = "mac-address";
+};
+
+&esw {
+ mediatek,portmap = <0x3e>;
+ mediatek,portdisable = <0x3c>;
+};
+
+&wmac {
+ status = "okay";
+
+ nvmem-cells = <&eeprom_factory_0>;
+ nvmem-cell-names = "eeprom";
+};
+
+&uart1 {
+ status = "okay";
+};
+
+&pcie {
+ status = "okay";
+};
diff --git a/target/linux/ramips/image/mt76x8.mk b/target/linux/ramips/image/mt76x8.mk
index c7168cc936..314f8e1e9f 100644
--- a/target/linux/ramips/image/mt76x8.mk
+++ b/target/linux/ramips/image/mt76x8.mk
@@ -321,6 +321,15 @@ define Device/hiwifi_hc5861b
endef
TARGET_DEVICES += hiwifi_hc5861b
+define Device/hongdian_h7920-v40
+ IMAGE_SIZE := 16064k
+ DEVICE_VENDOR := Hongdian
+ DEVICE_MODEL := H7920
+ DEVICE_VARIANT := v40
+ DEVICE_PACKAGES := kmod-usb2 kmod-usb-ohci kmod-usb-net-qmi-wwan kmod-usb-serial-option uqmi
+endef
+TARGET_DEVICES += hongdian_h7920-v40
+
define Device/iptime_a3
IMAGE_SIZE := 7936k
UIMAGE_NAME := a3
diff --git a/target/linux/ramips/mt76x8/base-files/etc/board.d/02_network b/target/linux/ramips/mt76x8/base-files/etc/board.d/02_network
index 23ec31f912..372821c3b8 100644
--- a/target/linux/ramips/mt76x8/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/mt76x8/base-files/etc/board.d/02_network
@@ -107,7 +107,8 @@ ramips_setup_interfaces()
"2:lan:2" "3:lan:1" "4:wan" "6 at eth0"
;;
duzun,dm06|\
- glinet,gl-mt300n-v2)
+ glinet,gl-mt300n-v2|\
+ hongdian,h7920-v40)
ucidef_add_switch "switch0" \
"1:lan" "0:wan" "6 at eth0"
;;
@@ -277,6 +278,7 @@ ramips_setup_macs()
totolink,a3)
wan_mac=$(mtd_get_mac_binary u-boot 0x1fc40)
;;
+ hongdian,h7920-v40|\
jotale,js76x8-8m|\
jotale,js76x8-16m|\
jotale,js76x8-32m|\
diff --git a/target/linux/ramips/mt76x8/base-files/etc/board.d/03_gpio_switches b/target/linux/ramips/mt76x8/base-files/etc/board.d/03_gpio_switches
new file mode 100644
index 0000000000..c70e59c480
--- /dev/null
+++ b/target/linux/ramips/mt76x8/base-files/etc/board.d/03_gpio_switches
@@ -0,0 +1,20 @@
+#
+# Copyright (C) 2025 OpenWrt.org
+#
+
+. /lib/functions/uci-defaults.sh
+
+board_config_update
+
+board=$(board_name)
+
+case "$board" in
+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"
+ ;;
+esac
+
+board_config_flush
+
+exit 0
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