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 <mariusd84@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/18514
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

5 files changed, 358 insertions, 1 deletions

diff --git a/target/linux/mediatek/dts/mt7981b-zbtlink-zbt-z8102ax-v2.dts b/target/linux/mediatek/dts/mt7981b-zbtlink-zbt-z8102ax-v2.dts
new file mode 100644
index 0000000000..6557b0ff4a
--- /dev/null
+++ b/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>;
+	};
+};
diff --git a/target/linux/mediatek/filogic/base-files/etc/board.d/02_network b/target/linux/mediatek/filogic/base-files/etc/board.d/02_network
index 861928d82d..a96ea99bc9 100644
--- a/target/linux/mediatek/filogic/base-files/etc/board.d/02_network
+++ b/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
diff --git a/target/linux/mediatek/filogic/base-files/etc/board.d/03_gpio_switches b/target/linux/mediatek/filogic/base-files/etc/board.d/03_gpio_switches
index 4cbec1ef07..1fe74f2b6f 100644
--- a/target/linux/mediatek/filogic/base-files/etc/board.d/03_gpio_switches
+++ b/target/linux/mediatek/filogic/base-files/etc/board.d/03_gpio_switches
@@ -5,7 +5,8 @@ board_config_update
 board=$(board_name)
 
 case "$board" in
-zbtlink,zbt-z8102ax)
+zbtlink,zbt-z8102ax|\
+zbtlink,zbt-z8102ax-v2)
 	ucidef_add_gpio_switch "5g1" "Power 1st modem" "5g1" "1"
 	ucidef_add_gpio_switch "5g2" "Power 2nd modem" "5g2" "1"
 	ucidef_add_gpio_switch "pcie" "Power PCIe port" "pcie" "1"
diff --git a/target/linux/mediatek/filogic/base-files/etc/hotplug.d/ieee80211/11_fix_wifi_mac b/target/linux/mediatek/filogic/base-files/etc/hotplug.d/ieee80211/11_fix_wifi_mac
index 5ca1ca462f..c42399cf64 100644
--- a/target/linux/mediatek/filogic/base-files/etc/hotplug.d/ieee80211/11_fix_wifi_mac
+++ b/target/linux/mediatek/filogic/base-files/etc/hotplug.d/ieee80211/11_fix_wifi_mac
@@ -185,6 +185,7 @@ case "$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)
diff --git a/target/linux/mediatek/image/filogic.mk b/target/linux/mediatek/image/filogic.mk
index 337403411a..b977d6117e 100644
--- a/target/linux/mediatek/image/filogic.mk
+++ b/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