filogic: add support for ASUS TUF-AX4200

Hardware
--------
SOC:   MediaTek MT7986
RAM:   512MB DDR3
FLASH: 256MB SPI-NAND (Winbond W25N02KV)
WIFI:  Mediatek MT7986 DBDC 802.11ax 2.4/5 GHz
ETH:   MediaTek MT7531 Switch
       MaxLinear GPY211C 2.5 N-Base-T PHY
UART:  3V3 115200 8N1 (Pinout silkscreened / Do not ocnnect VCC)

Installation
------------

1. Download the OpenWrt initramfs image. Copy the image to a TFTP server
   reachable at 192.168.1.66/24. Rename the image to tufax4200.bin.

2. Connect the TFTP server to the AX4200. Conect to the serial console,
   interrupt the autoboot process by pressing '4' when prompted.

3. Download & Boot the OpenWrt initramfs image.

   $ setenv ipaddr 192.168.1.1
   $ setenv serverip 192.168.1.66
   $ tftpboot 0x46000000 tufax4200.bin
   $ bootm 0x46000000

4. Wait for OpenWrt to boot. Transfer the sysupgrade image to the device
   using scp and install using sysupgrade.

   $ sysupgrade -n <path-to-sysupgrade.bin>

Missing features
----------------

 - The LAN port LEDs are driven by the switch but OpenWrt does not
   correctly configure the output.

Signed-off-by: David Bauer <mail@david-bauer.net>

target/linux/mediatek/dts/mt7986a-asus-tuf-ax4200.dts

@@ -0,0 +1,291 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+/dts-v1/;
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+
+#include "mt7986a.dtsi"
+
+/ {
+	model = "ASUS TUF-AX4200";
+	compatible = "asus,tuf-ax4200", "mediatek,mt7986a";
+
+	aliases {
+		serial0 = &uart0;
+		led-boot = &led_system;
+		led-failsafe = &led_system;
+		led-running = &led_system;
+		led-upgrade = &led_system;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+		bootargs-override = "ubi.mtd=UBI_DEV";
+	};
+
+	memory {
+		reg = <0 0x40000000 0 0x20000000>;
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&pio 9 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		mesh {
+			label = "wps";
+			gpios = <&pio 10 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		wlan24 {
+			label = "white:wlan24";
+			gpios = <&pio 1 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "phy0tpt";
+		};
+
+		wlan5 {
+			label = "white:wlan5";
+			gpios = <&pio 2 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "phy1tpt";
+		};
+
+		led_system: system {
+			label = "white:system";
+			gpios = <&pio 11 GPIO_ACTIVE_HIGH>;
+		};
+
+		wan-red {
+			label = "red:wan";
+			gpios = <&pio 12 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	reg_3p3v: regulator-3p3v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_5v: regulator-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-5V";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+};
+
+&eth {
+	status = "okay";
+
+	gmac0: mac@0 {
+		/* LAN */
+		compatible = "mediatek,eth-mac";
+		reg = <0>;
+		phy-mode = "2500base-x";
+
+		fixed-link {
+			speed = <2500>;
+			full-duplex;
+			pause;
+		};
+	};
+
+	gmac1: mac@1 {
+		/* WAN */
+		compatible = "mediatek,eth-mac";
+		reg = <1>;
+		phy-mode = "2500base-x";
+		phy-handle = <&phy6>;
+	};
+
+	mdio: mdio-bus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};
+};
+
+&mdio {
+	phy6: phy@6 {
+		compatible = "ethernet-phy-ieee802.3-c45";
+		reg = <6>;
+
+		reset-gpios = <&pio 6 GPIO_ACTIVE_LOW>;
+		reset-assert-us = <10000>;
+		reset-deassert-us = <10000>;
+
+		/* LED0: CONN (WAN white) */
+		mxl,led-config = <0x00f0 0x0 0x0 0x0>;
+	};
+
+	switch: switch@0 {
+		compatible = "mediatek,mt7531";
+		reg = <31>;
+
+		reset-gpios = <&pio 5 GPIO_ACTIVE_HIGH>;
+		reset-assert-us = <10000>;
+		reset-deassert-us = <10000>;
+	};
+};
+
+&pio {
+	spi_flash_pins: spi-flash-pins-33-to-38 {
+		mux {
+			function = "spi";
+			groups = "spi0", "spi0_wp_hold";
+		};
+		conf-pu {
+			pins = "SPI2_CS", "SPI2_HOLD", "SPI2_WP";
+			drive-strength = <8>;
+			mediatek,pull-up-adv = <0>; /* bias-disable */
+		};
+		conf-pd {
+			pins = "SPI2_CLK", "SPI2_MOSI", "SPI2_MISO";
+			drive-strength = <8>;
+			mediatek,pull-down-adv = <0>; /* bias-disable */
+		};
+	};
+
+	wf_2g_5g_pins: wf_2g_5g-pins {
+		mux {
+			function = "wifi";
+			groups = "wf_2g", "wf_5g";
+		};
+		conf {
+			pins = "WF0_HB1", "WF0_HB2", "WF0_HB3", "WF0_HB4",
+			       "WF0_HB0", "WF0_HB0_B", "WF0_HB5", "WF0_HB6",
+			       "WF0_HB7", "WF0_HB8", "WF0_HB9", "WF0_HB10",
+			       "WF0_TOP_CLK", "WF0_TOP_DATA", "WF1_HB1",
+			       "WF1_HB2", "WF1_HB3", "WF1_HB4", "WF1_HB0",
+			       "WF1_HB5", "WF1_HB6", "WF1_HB7", "WF1_HB8",
+			       "WF1_TOP_CLK", "WF1_TOP_DATA";
+			drive-strength = <4>;
+		};
+	};
+
+	wf_dbdc_pins: wf-dbdc-pins {
+		mux {
+			function = "wifi";
+			groups = "wf_dbdc";
+		};
+		conf {
+			pins = "WF0_HB1", "WF0_HB2", "WF0_HB3", "WF0_HB4",
+				"WF0_HB0", "WF0_HB0_B", "WF0_HB5", "WF0_HB6",
+				"WF0_HB7", "WF0_HB8", "WF0_HB9", "WF0_HB10",
+				"WF0_TOP_CLK", "WF0_TOP_DATA", "WF1_HB1",
+				"WF1_HB2", "WF1_HB3", "WF1_HB4", "WF1_HB0",
+				"WF1_HB5", "WF1_HB6", "WF1_HB7", "WF1_HB8",
+				"WF1_TOP_CLK", "WF1_TOP_DATA";
+			drive-strength = <4>;
+		};
+	};
+};
+
+&spi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi_flash_pins>;
+	status = "okay";
+
+	spi_nand_flash: flash@0 {
+		compatible = "spi-nand";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0>;
+
+		spi-max-frequency = <20000000>;
+		spi-tx-buswidth = <4>;
+		spi-rx-buswidth = <4>;
+
+		partitions: partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "bootloader";
+				reg = <0x0 0x400000>;
+				read-only;
+			};
+
+			partition@400000 {
+				label = "UBI_DEV";
+				reg = <0x400000 0xfc00000>;
+			};
+		};
+	};
+};
+
+&switch {
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@1 {
+			reg = <1>;
+			label = "lan1";
+		};
+
+		port@2 {
+			reg = <2>;
+			label = "lan2";
+		};
+
+		port@3 {
+			reg = <3>;
+			label = "lan3";
+		};
+
+		port@4 {
+			reg = <4>;
+			label = "lan4";
+		};
+
+		port@6 {
+			reg = <6>;
+			label = "cpu";
+			ethernet = <&gmac0>;
+			phy-mode = "2500base-x";
+
+			fixed-link {
+				speed = <2500>;
+				full-duplex;
+				pause;
+			};
+		};
+	};
+};
+
+&wmac {
+	status = "okay";
+	pinctrl-names = "default", "dbdc";
+	pinctrl-0 = <&wf_2g_5g_pins>;
+	pinctrl-1 = <&wf_dbdc_pins>;
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&ssusb {
+	vusb33-supply = <&reg_3p3v>;
+	vbus-supply = <&reg_5v>;
+	status = "okay";
+};
+
+&usb_phy {
+	status = "okay";
+};

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

@@ -8,6 +8,10 @@ mediatek_setup_interfaces()
 	local board="$1"
 
 	case $board in
+	asus,tuf-ax4200)
+		CI_UBIPART="UBI_DEV"
+		ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4" "eth1"
+		;;
 	mediatek,mt7986a-rfb|\
 	mediatek,mt7986b-rfb)
 		ucidef_set_interfaces_lan_wan "lan0 lan1 lan2 lan3" eth1
@@ -34,6 +38,12 @@ mediatek_setup_macs()
 	local label_mac=""
 
 	case $board in
+	asus,tuf-ax4200)
+		CI_UBIPART="UBI_DEV"
+		addr=$(mtd_get_mac_binary_ubi "Factory" 0x4)
+		wan_mac="${addr}"
+		lan_mac="${addr}"
+		;;
 	xiaomi,redmi-router-ax6000-stock|\
 	xiaomi,redmi-router-ax6000-ubootmod)
 		wan_mac=$(mtd_get_mac_ascii Bdata ethaddr_wan)

target/linux/mediatek/filogic/base-files/etc/hotplug.d/firmware/11-mt76-caldata

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+[ -e /lib/firmware/$FIRMWARE ] && exit 0
+
+. /lib/functions/caldata.sh
+
+board=$(board_name)
+
+case "$FIRMWARE" in
+"mediatek/mt7986_eeprom_mt7976_dbdc.bin")
+	case "$board" in
+	asus,tuf-ax4200)
+		CI_UBIPART="UBI_DEV"
+		caldata_extract_ubi "Factory" 0x0 0x1000
+		;;
+	esac
+	;;
+*)
+	exit 1
+	;;
+esac

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

@@ -10,6 +10,15 @@ PHYNBR=${DEVPATH##*/phy}
 board=$(board_name)
 
 case "$board" in
+	asus,tuf-ax4200)
+		CI_UBIPART="UBI_DEV"
+		addr=$(mtd_get_mac_binary_ubi "Factory" 0x4)
+		# Originally, phy0 is phy1 mac with LA bit set. However, this would conflict
+		# addresses on mutiple VIFs with the other radio. Set LA bit and increment
+		# mac-address instead.
+		[ "$PHYNBR" = "0" ] && macaddr_setbit_la $(macaddr_add $addr 1) > /sys${DEVPATH}/macaddress
+		[ "$PHYNBR" = "1" ] && echo "$addr" > /sys${DEVPATH}/macaddress
+		;;
 	bananapi,bpi-r3)
 		addr=$(macaddr_add $(cat /sys/class/net/eth0/address) 2)
 		[ "$PHYNBR" = "0" ] && macaddr_unsetbit $addr 6 > /sys${DEVPATH}/macaddress

target/linux/mediatek/filogic/base-files/lib/preinit/10_fix_eth_mac.sh

@@ -0,0 +1,14 @@
+. /lib/functions/system.sh
+
+preinit_set_mac_address() {
+	case $(board_name) in
+	asus,tuf-ax4200)
+		CI_UBIPART="UBI_DEV"
+		addr=$(mtd_get_mac_binary_ubi "Factory" 0x4)
+		ip link set dev eth0 address "$addr"
+		ip link set dev eth1 address "$addr"
+		;;
+	esac
+}
+
+boot_hook_add preinit_main preinit_set_mac_address

target/linux/mediatek/filogic/base-files/lib/upgrade/platform.sh

@@ -42,6 +42,11 @@ platform_do_upgrade() {
 	local board=$(board_name)
 
 	case "$board" in
+	asus,tuf-ax4200)
+		CI_UBIPART="UBI_DEV"
+		CI_KERNPART="linux"
+		nand_do_upgrade "$1"
+		;;
 	bananapi,bpi-r3)
 		local rootdev="$(cmdline_get_var root)"
 		rootdev="${rootdev##*/}"

target/linux/mediatek/image/filogic.mk

@@ -38,6 +38,24 @@ define Build/mt7986-gpt
 	rm $@.tmp
 endef
 
+define Device/asus_tuf-ax4200
+  DEVICE_VENDOR := ASUS
+  DEVICE_MODEL := TUF-AX4200
+  DEVICE_DTS := mt7986a-asus-tuf-ax4200
+  DEVICE_DTS_DIR := ../dts
+  DEVICE_DTS_LOADADDR := 0x47000000
+  DEVICE_PACKAGES := kmod-usb3
+  IMAGES := sysupgrade.bin
+  KERNEL_LOADADDR := 0x48000000
+  KERNEL = kernel-bin | lzma | \
+	fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb
+  KERNEL_INITRAMFS := kernel-bin | lzma | \
+	fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb with-initrd | pad-to 64k
+  IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
+endef
+TARGET_DEVICES += asus_tuf-ax4200
+
+
 define Device/bananapi_bpi-r3
   DEVICE_VENDOR := Bananapi
   DEVICE_MODEL := BPi-R3