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ramips: mt76x8: add support for Cudy LT300 v3
Hardware: - SoC: MediaTek MT7628AN (MIPS 580MHz) - Flash: 16 MiB NOR - RAM: 64 MiB DDR2 - WLAN: 2.4 GHz (MT7628), 5 GHz (MT7613BEN 802.11ac) - Ethernet: 1x 10/100 Mbps WAN/LAN, 1x 10/100 LAN (MT7628) - Build-in LTE Modem: MeigLink SLM770A 4G Cat. 4 (150/50 Mbps) - Buttons: 1x Reset, 1x wps - LEDs: Front: 1x Red, 1x White, Back: 3x White 4G signal strengh - Serial console: unpopulated header, 115200 8n1 - Power: USB-C MAC addresses: +---------+-------------------+-----------+ | | MAC | Algorithm | +---------+-------------------+-----------+ | WAN | 80:af:ca:xx:xx:x0 | label | | LAN | 80:af:ca:xx:xx:x0 | label | | WLAN 2g | 80:af:ca:xx:xx:x0 | label | | WLAN 5g | 80:af:ca:xx:xx:x2 | label+2 | +---------+-------------------+-----------+ Migration to OpenWrt: - Download the RSA signed intermediate firmware from the Cudy website: `openwrt-ramips-mt76x8-cudy_lt300-v3-squashfs-flash.bin` - Connect computer to LAN and flash the intermediate firmware via OEM web interface - OpenWrt is now accessible via 192.168.1.1 Revert back to OEM firmware: - Set up a TFTP server on IP 192.168.1.88 and connect to the WAN port (upper port) - Provide the Cudy firmware as recovery.bin in the TFTP server - Press the reset button while powering on the device - Recovery process is started now - When recovery process is done, OEM firmware is accessible via 192.168.10.1 again General information: - No possibility to load a initramfs image via U-Boot because there is no option to interrupt U-Boot Signed-off-by: Fil Dunsky <filipp.dunsky@gmail.com>
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‎target/linux/ramips/dts/mt7628an_cudy_lt300-v3.dts‎

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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 = "cudy,lt300-v3", "mediatek,mt7628an-soc";
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model = "Cudy LT300 v3";
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aliases {
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led-boot = &white_status;
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led-running = &white_status;
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led-failsafe = &red_status;
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led-upgrade = &red_status;
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label-mac-device = &ethernet;
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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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gpio-keys {
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compatible = "gpio-keys";
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reset {
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label = "reset";
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linux,code = <KEY_RESTART>;
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gpios = <&gpio 38 GPIO_ACTIVE_LOW>;
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};
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wps {
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label = "wps";
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gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
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linux,code = <KEY_WPS_BUTTON>;
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};
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};
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gpio-leds {
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compatible = "gpio-leds";
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red_status: red_status {
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function = LED_FUNCTION_STATUS;
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color = <LED_COLOR_ID_RED>;
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gpios = <&gpio 37 GPIO_ACTIVE_LOW>;
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};
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white_status: white_status {
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function = LED_FUNCTION_STATUS;
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color = <LED_COLOR_ID_WHITE>;
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gpios = <&gpio 44 GPIO_ACTIVE_LOW>;
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};
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signal1 {
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label = "white:signal1";
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color = <LED_COLOR_ID_WHITE>;
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gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
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};
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signal2 {
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label = "white:signal2";
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color = <LED_COLOR_ID_WHITE>;
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gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
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};
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signal3 {
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label = "white:signal3";
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color = <LED_COLOR_ID_WHITE>;
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gpios = <&gpio 0 GPIO_ACTIVE_LOW>;
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};
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};
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gpio_export {
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compatible = "gpio-export";
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usb4g {
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gpio-export,name = "4g";
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gpio-export,output = <0>;
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gpios = <&gpio 3 GPIO_ACTIVE_HIGH>;
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};
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};
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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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eeprom_factory_8000: eeprom@8000 {
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reg = <0x8000 0x4da8>;
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};
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};
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};
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partition@fd0000 {
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label = "debug";
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reg = <0xfd0000 0x10000>;
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read-only;
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};
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partition@fe0000 {
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label = "backup";
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reg = <0xfe000 0x10000>;
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read-only;
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};
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partition@ff0000 {
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label = "bdinfo";
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reg = <0xff0000 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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macaddr_bdinfo_de00: macaddr@de00 {
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compatible = "mac-base";
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reg = <0xde00 0x6>;
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#nvmem-cell-cells = <1>;
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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 0xf80000>;
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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 = "i2c", "gpio", "wdt", "p0led_an", "wled_an";
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function = "gpio";
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};
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};
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&ehci {
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status = "okay";
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};
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&ohci {
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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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&pcie0 {
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wifi@0,0 {
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compatible = "mediatek,mt76";
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reg = <0x0000 0 0 0 0>;
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nvmem-cells = <&eeprom_factory_8000>, <&macaddr_bdinfo_de00 2>;
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nvmem-cell-names = "eeprom", "mac-address";
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ieee80211-freq-limit = <5000000 6000000>;
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};
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};
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&wmac {
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status = "okay";
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nvmem-cells = <&eeprom_factory_0>, <&macaddr_bdinfo_de00 0>;
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nvmem-cell-names = "eeprom", "mac-address";
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};
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&ethernet {
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nvmem-cells = <&macaddr_bdinfo_de00 0>;
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nvmem-cell-names = "mac-address";
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};
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&esw {
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mediatek,portmap = <0x3d>;
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mediatek,portdisable = <0x3c>;
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};

‎target/linux/ramips/image/mt76x8.mk‎

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endef
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TARGET_DEVICES += creality_wb-01
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define Device/cudy_lt300-v3
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IMAGE_SIZE := 15872k
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DEVICE_VENDOR := Cudy
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DEVICE_MODEL := LT300
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DEVICE_VARIANT := v3
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DEVICE_PACKAGES := kmod-usb2 kmod-usb-ohci kmod-usb-net-cdc-ether \
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kmod-usb-serial-option kmod-mt7615e kmod-mt7663-firmware-ap
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SUPPORTED_DEVICES += R100
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endef
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TARGET_DEVICES += cudy_lt300-v3
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define Device/cudy_lt400e-v1
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IMAGE_SIZE := 7808k
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DEVICE_VENDOR := Cudy

‎target/linux/ramips/mt76x8/base-files/etc/board.d/01_leds‎

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creality,wb-01)
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ucidef_set_led_switch "lan" "lan" "blue:lan" "switch0" "0x1"
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;;
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cudy,lt300-v3)
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ucidef_set_led_netdev "internet" "internet" "white:status" "usb0"
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;;
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cudy,lt400e-v1)
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ucidef_set_led_switch "lan1" "lan1" "blue:lan-1" "switch0" "0x08"
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ucidef_set_led_switch "lan2" "lan2" "blue:lan-2" "switch0" "0x04"

‎target/linux/ramips/mt76x8/base-files/etc/board.d/02_network‎

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ucidef_add_switch "switch0" \
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"4:lan" "6@eth0"
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;;
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cudy,lt300-v3)
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ucidef_add_switch "switch0" \
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"0:lan" "1:wan" "6@eth0"
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ucidef_set_interface "wwan" device "usb0" protocol "dhcp"
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uci add_list firewall.@zone[1].network='wwan'
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uci add_list firewall.@zone[1].network='wwan6'
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;;
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cudy,lt400e-v1)
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ucidef_add_switch "switch0" \
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"3:lan:1" "2:lan:2" "1:lan:3" "0:lan:4" "6@eth0"

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