mediatek: add support for Zbtlink ZBT-Z8102AX v2

Specifications:
SoC: MediaTek MT7981B
RAM: 1024MiB
Flash: SPI-NAND 128 MiB
Switch: 1 WAN, 4 LAN (Gigabit)
USB: two M.2 slots for 5G modems via USB 3.0 hub, external USB 3.0 port
Buttons: Reset, Mesh
Power: DC 12V 1A
WiFi: MT7976CN
UART: 115200n8
UART Layout:
VCC-RX-TX-GND

Installation:
1. Power down the router and hold in the Reset button.
2. While holding in the button power up the router again.
3. Hold the button in for 10 seconds and then release.
4. Use your browser to go to 192.168.1.1
5. If you see a GUI that is for flashing firmware then you have the V2 model.
	If there is no GUI and the router continues to boot up normally
	you have the V1 model.
6. Now use the V2 sysugrade file.

Note: Recovery GUI it can be used to recover from an incorrect firmware flash.

Based on patches adding support for this device by Yannick Chabanois (openmptcprouter)
and Dairyman (ofmodemsandmen)

Signed-off-by: Marius Durbaca <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/18514
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/mediatek/dts/mt7981b-zbtlink-zbt-z8102ax-v2.dts

@@ -0,0 +1,337 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT 
+
+/dts-v1/;
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "mt7981b.dtsi"
+
+/ {
+	model = "ZBT Z8102AX V2";
+	compatible = "zbtlink,zbt-z8102ax-v2", "mediatek,mt7981";
+
+	aliases {
+		serial0 = &uart0;
+		led-boot = &led_status_red;
+		led-failsafe = &led_status_red;
+		led-running = &led_status_green;
+		led-upgrade = &led_status_green;
+		label-mac-device = &gmac0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+		bootargs = "earlycon=uart8250,mmio32,0x11002000 console=ttyS0,115200n8";
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&pio 1 GPIO_ACTIVE_LOW>;
+		};
+
+		wps {
+			label = "wps";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&pio 0 GPIO_ACTIVE_LOW>;
+		};
+		
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_status_red: red {
+			gpios = <&pio 9 GPIO_ACTIVE_HIGH>;
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_STATUS;
+		};
+
+		led_status_green: green {
+			gpios = <&pio 10 GPIO_ACTIVE_LOW>;
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_STATUS;
+		};
+		
+		led_status_blue: blue {
+			gpios = <&pio 11 GPIO_ACTIVE_LOW>;
+			color = <LED_COLOR_ID_BLUE>;
+			function = LED_FUNCTION_STATUS;
+		};
+		
+		led_status_5g1: 5g1 {
+			gpios = <&pio 8 GPIO_ACTIVE_LOW>;
+			color = <LED_COLOR_ID_BLUE>;
+			function = LED_FUNCTION_USB;
+			function-enumerator = <0>;
+		};
+		
+		led_status_5g2: 5g2 {
+			gpios = <&pio 13 GPIO_ACTIVE_LOW>;
+			color = <LED_COLOR_ID_BLUE>;
+			function = LED_FUNCTION_USB;
+			function-enumerator = <1>;
+		};
+	};
+
+	watchdog {
+		compatible = "linux,wdt-gpio";
+		gpios = <&pio 2 GPIO_ACTIVE_HIGH>;
+		hw_algo = "toggle";
+		hw_margin_ms = <1000>;
+	};
+
+	gpio-export {
+		compatible = "gpio-export";
+		#size-cells = <0>;
+
+		pcie {
+			gpio-export,name = "pcie_power";
+			gpio-export,output = <1>;
+			gpios = <&pio 3 GPIO_ACTIVE_HIGH>;
+		};
+
+		5g1 {
+			gpio-export,name = "5g1";
+			gpio-export,output = <1>;
+			gpios = <&pio 4 GPIO_ACTIVE_HIGH>;
+		};
+
+		5g2 {
+			gpio-export,name = "5g2";
+			gpio-export,output = <1>;
+			gpios = <&pio 5 GPIO_ACTIVE_HIGH>;
+		};
+
+		sim1 {
+			gpio-export,name = "sim1";
+			gpio-export,output = <0>;
+			gpios = <&pio 6 GPIO_ACTIVE_LOW>;
+		};
+
+		sim2 {
+			gpio-export,name = "sim2";
+			gpio-export,output = <0>;
+			gpios = <&pio 7 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&eth {
+	status = "okay";
+
+	gmac0: mac@0 {
+		compatible = "mediatek,eth-mac";
+		reg = <0>;
+		phy-mode = "2500base-x";
+		nvmem-cell-names = "mac-address";
+
+		fixed-link {
+			speed = <2500>;
+			full-duplex;
+			pause;
+		};
+	};
+	
+	gmac1: mac@1 {
+		compatible = "mediatek,eth-mac";
+		reg = <1>;
+		phy-mode = "gmii";
+		phy-handle = <&int_gbe_phy>;
+		nvmem-cell-names = "mac-address";
+		nvmem-cells = <&macaddr_factory_02a>;
+	};
+};
+
+&mdio_bus {
+	switch: switch@1f {
+		compatible = "mediatek,mt7531";
+		reg = <31>;
+		reset-gpios = <&pio 39 GPIO_ACTIVE_HIGH>;
+		interrupt-controller;
+		#interrupt-cells = <1>;
+		interrupt-parent = <&pio>;
+		interrupts = <38 IRQ_TYPE_LEVEL_HIGH>;
+	};
+};
+
+&spi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0_flash_pins>;
+	status = "okay";
+
+	spi_nand@0 {
+		compatible = "spi-nand";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0>;
+
+		spi-max-frequency = <52000000>;
+		spi-tx-buswidth = <4>;
+		spi-rx-buswidth = <4>;
+
+		mediatek,nmbm;
+		mediatek,bmt-max-ratio = <1>;
+		mediatek,bmt-max-reserved-blocks = <64>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "bl2";
+				reg = <0x0000000 0x0100000>;
+				read-only;
+			};
+
+			partition@100000 {
+				label = "u-boot-env";
+				reg = <0x0100000 0x0080000>;
+			};
+
+			factory: partition@180000 {
+				label = "Factory";
+				reg = <0x0180000 0x0200000>;
+				read-only;
+			};
+
+			partition@380000 {
+				label = "FIP";
+				reg = <0x0380000 0x0200000>;
+				read-only;
+			};
+
+			nand_rootfs: partition@580000 {
+				label = "ubi";
+				reg = <0x0580000 0x7220000>;
+			};
+		};
+	};
+};
+
+&switch {
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+			label = "lan1";
+			nvmem-cell-names = "mac-address";
+			nvmem-cells = <&macaddr_factory_004>;
+		};
+
+		port@1 {
+			reg = <1>;
+			label = "lan2";
+			nvmem-cell-names = "mac-address";
+			nvmem-cells = <&macaddr_factory_004>;
+		};
+
+		port@2 {
+			reg = <2>;
+			label = "lan3";
+			nvmem-cell-names = "mac-address";
+			nvmem-cells = <&macaddr_factory_004>;
+		};
+
+		port@3 {
+			reg = <3>;
+			label = "lan4";
+			nvmem-cell-names = "mac-address";
+			nvmem-cells = <&macaddr_factory_004>;
+		};
+
+		port@6 {
+			reg = <6>;
+			label = "cpu";
+			ethernet = <&gmac0>;
+			phy-mode = "2500base-x";
+
+			fixed-link {
+				speed = <2500>;
+				full-duplex;
+				pause;
+			};
+		};
+	};
+};
+
+&pio {
+	gpio-line-names = 
+			"wps",
+			"reset",
+			"watchdog",
+			"pcie",
+			"5g1",
+			"5g2",
+			"sim1",
+			"sim2",
+			"5g1_status",
+			"red_status",
+			"green_status",
+			"blue_status",
+			"",
+			"5g2_status";
+
+	spi0_flash_pins: spi0-pins {
+		mux {
+			function = "spi";
+			groups = "spi0", "spi0_wp_hold";
+		};
+
+		conf-pu {
+			pins = "SPI0_CS", "SPI0_HOLD", "SPI0_WP";
+			drive-strength = <8>;
+			mediatek,pull-up-adv = <0>; /* bias-disable */
+		};
+
+		conf-pd {
+			pins = "SPI0_CLK", "SPI0_MOSI", "SPI0_MISO";
+			drive-strength = <8>;
+			mediatek,pull-up-adv = <0>; /* bias-disable */
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&watchdog {
+	status = "okay";
+};
+
+&usb_phy {
+	status = "okay";
+};
+
+&xhci {
+	status = "okay";
+};
+
+&wifi {
+	status = "okay";
+        nvmem-cells = <&eeprom_factory>;
+        nvmem-cell-names = "eeprom";
+};
+
+&factory {
+	compatible = "nvmem-cells";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	macaddr_factory_004: macaddr@004 {
+		reg = <0x004 0x6>;
+	};
+	macaddr_factory_02a: macaddr@02a {
+		reg = <0x02a 0x6>;
+	};
+        eeprom_factory: eeprom@0 {
+		reg = <0x0 0x1000>;
+	};
+};

target/linux/mediatek/filogic/base-files/etc/board.d/02_network

@@ -57,6 +57,7 @@ mediatek_setup_interfaces()
 	ruijie,rg-x60-pro|\
 	unielec,u7981-01*|\
 	zbtlink,zbt-z8102ax|\
+	zbtlink,zbt-z8102ax-v2|\
 	zyxel,ex5601-t0-stock|\
 	zyxel,ex5601-t0-ubootmod)
 		ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4" eth1

target/linux/mediatek/filogic/base-files/etc/board.d/03_gpio_switches

@@ -5,7 +5,8 @@ board_config_update
 board=$(board_name)
 
 case "$board" in
-zbtlink,zbt-z8102ax)
+zbtlink,zbt-z8102ax|\
+zbtlink,zbt-z8102ax-v2)
 	ucidef_add_gpio_switch "5g1" "Power 1st modem" "5g1" "1"
 	ucidef_add_gpio_switch "5g2" "Power 2nd modem" "5g2" "1"
 	ucidef_add_gpio_switch "pcie" "Power PCIe port" "pcie" "1"

target/linux/mediatek/filogic/base-files/etc/hotplug.d/ieee80211/11_fix_wifi_mac

@@ -185,6 +185,7 @@ case "$board" in
 	routerich,ax3000|\
 	routerich,ax3000-ubootmod|\
 	zbtlink,zbt-z8102ax|\
+	zbtlink,zbt-z8102ax-v2|\
 	zbtlink,zbt-z8103ax|\
 	zyxel,ex5601-t0-stock|\
 	zyxel,ex5601-t0-ubootmod)

target/linux/mediatek/image/filogic.mk

@@ -2015,6 +2015,23 @@ define Device/zbtlink_zbt-z8102ax
 endef
 TARGET_DEVICES += zbtlink_zbt-z8102ax
 
+define Device/zbtlink_zbt-z8102ax-v2
+  DEVICE_VENDOR := Zbtlink
+  DEVICE_MODEL := ZBT-Z8102AX-V2
+  DEVICE_DTS := mt7981b-zbtlink-zbt-z8102ax-v2
+  DEVICE_DTS_DIR := ../dts
+  DEVICE_PACKAGES := kmod-mt7915e kmod-mt7981-firmware mt7981-wo-firmware kmod-usb3 kmod-usb-net-qmi-wwan kmod-usb-serial-option
+  KERNEL_IN_UBI := 1
+  UBINIZE_OPTS := -E 5
+  BLOCKSIZE := 128k
+  PAGESIZE := 2048
+  IMAGE_SIZE := 65536k
+  IMAGES += factory.bin
+  IMAGE/factory.bin := append-ubi | check-size $$(IMAGE_SIZE)
+  IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
+endef
+TARGET_DEVICES += zbtlink_zbt-z8102ax-v2
+
 define Device/zbtlink_zbt-z8103ax
   DEVICE_VENDOR := Zbtlink
   DEVICE_MODEL := ZBT-Z8103AX