mediatek: filogic: Add support ASUS RT-AX57M

ASUS RT-AX57M, RT-AX54HP V2, RT-AX1800HP V2, RT-AX1800S V2, and RT-AX3000S all use the same firmware and have identical hardware

Hardware
--------
SOC: MediaTek MT7981b
RAM: 256MB DDR3L (Winbond W632GU6NB-09)
FLASH: 128MB SPI-NAND (Winbond W25N01KVZEIR)
WIFI: Mediatek MT7981b + Mediatek MT7976DAN 802.11ax 2.4/5 GHz
ETH: MediaTek MT7531AE Switch
UART: 3V3 115200 8N1 (Pinout silkscreened / Do not connect VCC)

MAC addresses
-------------
LAN	Label MAC (stored in mtd ubi Factory partition at offset 0x4)
WAN	LAN
2.4G	LAN + 2 in first octet
5G	LAN

Installation
-----------------------------------------------------------
Vendor-UI Method
-----------------------------------------------------------
1. Download the OpenWrt initramfs.trx image.

2. Connect the PC via LAN to one of the yellow router ports and wait
   until your PC to get a DHCP lease.

3. Browse to http://192.168.1.1 (or whatever your router IP is configured as)

4. If your router is brand new, finish the setup process and log into
   the Web-UI.

5. Navigate to Administration -> Firmware Upgrade and upload the
   downloaded OpenWrt initramfs.trx image.

6. Wait for OpenWrt to boot. Open the default OpenWrt IP in a web browser and perform a system upgrade using the sysupgrade image as instructed in the top banner.

---------------------------------------------------------------------------
Revert to stock firmware:
1: Install package facinstall -> https://forum.openwrt.org/t/facinstall-package-for-easy-installation-factory-images/177587
2. Install Asus stock trx image via OpenWRT LuCI interface.

Signed-off-by: Garrett Mesmer <[email protected]>
Co-Authored-By: Oleg S <[email protected]>
Signed-off-by: Oleg S <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/20491
(cherry picked from commit d09e2b1926a6009299eb034928df2c6b6b04dfa8)
Link: https://github.com/openwrt/openwrt/pull/21237
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/mediatek/dts/mt7981b-asus-rt-ax57m.dts

@@ -0,0 +1,334 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+/dts-v1/;
+#include "mt7981b.dtsi"
+/ {
+	model = "ASUS RT-AX57M";
+	compatible = "asus,rt-ax57m", "mediatek,mt7981";
+
+	aliases {
+		serial0 = &uart0;
+		label-mac-device = &gmac0;
+		led-boot = &led_power;
+		led-failsafe = &led_power;
+		led-running = &led_power;
+		led-upgrade = &led_power;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+		bootargs-override = "";
+	};
+
+	memory@40000000 {
+		reg = <0 0x40000000 0 0x10000000>;
+		device_type = "memory";
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&pio 1 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&pio 0 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power: power {
+			function = LED_FUNCTION_POWER;
+			color = <LED_COLOR_ID_BLUE>;
+			gpios = <&pio 4 GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+		};
+
+		wan-blue {
+			function = LED_FUNCTION_WAN;
+			color = <LED_COLOR_ID_BLUE>;
+			gpios = <&pio 5 GPIO_ACTIVE_LOW>;
+		};
+
+		wan-red {
+			function = LED_FUNCTION_WAN;
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&pio 6 GPIO_ACTIVE_LOW>;
+		};
+
+		lan {
+			function = LED_FUNCTION_LAN;
+			color = <LED_COLOR_ID_BLUE>;
+			gpios = <&pio 7 GPIO_ACTIVE_LOW>;
+		};		
+
+		wlan24 {
+			function = LED_FUNCTION_WLAN_2GHZ;
+			color = <LED_COLOR_ID_BLUE>;
+			gpios = <&pio 8 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy0tpt";
+		};
+
+		wlan5 {
+			function = LED_FUNCTION_WLAN_5GHZ;
+			color = <LED_COLOR_ID_BLUE>;
+			gpios = <&pio 9 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy1tpt";
+		};
+	};
+
+	timer {
+		clock-frequency = <13000000>;
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&eth {
+	status = "okay";
+
+	gmac0: mac@0 {
+		/* LAN */
+		compatible = "mediatek,eth-mac";
+		reg = <0>;
+		nvmem-cells = <&macaddr_factory_4>;
+		nvmem-cell-names = "mac-address";
+		phy-mode = "2500base-x";
+
+		fixed-link {
+			speed = <2500>;
+			full-duplex;
+			pause;
+		};
+	};
+
+	mdio: mdio-bus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		switch@1f {
+			compatible = "mediatek,mt7531";
+			reg = <31>;
+			reset-gpios = <&pio 39 GPIO_ACTIVE_HIGH>;
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					label = "lan4";
+				};
+
+				port@1 {
+					reg = <1>;
+					label = "lan3";
+				};
+
+				port@2 {
+					reg = <2>;
+					label = "lan2";
+				};
+
+				port@3 {
+					reg = <3>;
+					label = "lan1";
+				};
+
+				port@4 {
+					reg = <4>;
+					label = "wan";
+				};
+
+				port@6 {
+					reg = <6>;
+					label = "cpu";
+					ethernet = <&gmac0>;
+					phy-mode = "2500base-x";
+
+					fixed-link {
+						speed = <2500>;
+						full-duplex;
+						pause;
+					};
+				};
+			};
+		};
+	};
+};
+
+&spi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0_flash_pins>;
+	status = "okay";
+
+	spi_nand_flash: flash@0 {
+		compatible = "u-boot-dont-touch-spi-nand";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0>;
+
+		spi-max-frequency = <52000000>;
+		spi-tx-bus-width = <4>;
+		spi-rx-bus-width = <4>;
+
+		/*
+		 * ASUS bootloader tries to replace the partitions defined in
+		 * Device Tree and by that also deletes all additional properties
+		 * needed for UBI and NVMEM-on-UBI.
+		 * Prevent this from happening by tricking the loader to delete and
+		 * replace a bait node instead (works with older bootloaders).
+		 */
+		partitions: dummy {
+			compatible = "u-boot-dummy-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				reg = <0x0 0x0>;
+				label = "remove_me";
+			};
+		};
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				reg = <0x0 0x400000>;
+				label = "bootloader";
+				read-only;
+			};
+
+			partition@400000 {
+				compatible = "linux,ubi";
+				reg = <0x400000 0x7c00000>;
+				label = "UBI_DEV";
+
+				volumes {
+					ubi_factory: ubi-volume-factory {
+						volname = "Factory";
+					};
+				};
+			};
+		};
+	};
+};
+
+&ubi_factory {
+	nvmem-layout {
+		compatible = "fixed-layout";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		eeprom_factory_0: eeprom@0 {
+			reg = <0x0 0x1000>;
+		};
+
+		macaddr_factory_4: macaddr@4 {
+			reg = <0x4 0x6>;
+		};
+
+		precal_factory_1010: precal@1010 {
+			reg = <0x1010 0x6f010>;
+		};		
+	};
+};
+
+&pio {
+	i2c_pins: i2c-pins-g0 {
+		mux {
+			function = "i2c";
+			groups = "i2c0_0";
+		};
+	};
+
+	pcm_pins: pcm-pins-g0 {
+		mux {
+			function = "pcm";
+			groups = "pcm";
+		};
+	};
+
+	pwm0_pin: pwm0-pin-g0 {
+		mux {
+			function = "pwm";
+			groups = "pwm0_0";
+		};
+	};
+
+	pwm1_pin: pwm1-pin-g1 {
+		mux {
+			function = "pwm";
+			groups = "pwm1_1";
+		};
+	};
+
+	pwm2_pin: pwm2-pin {
+		mux {
+			function = "pwm";
+			groups = "pwm2";
+		};
+	};
+
+	spi0_flash_pins: spi0-pins {
+		mux {
+			function = "spi";
+			groups = "spi0", "spi0_wp_hold";
+		};
+
+		conf-pu {
+			pins = "SPI0_CS", "SPI0_HOLD", "SPI0_WP";
+			drive-strength = <MTK_DRIVE_8mA>;
+			bias-pull-up = <MTK_PUPD_SET_R1R0_11>;
+		};
+
+		conf-pd {
+			pins = "SPI0_CLK", "SPI0_MOSI", "SPI0_MISO";
+			drive-strength = <MTK_DRIVE_8mA>;
+			bias-pull-down = <MTK_PUPD_SET_R1R0_11>;
+		};
+	};
+
+	spic_pins: spi1-pins {
+		mux {
+			function = "spi";
+			groups = "spi1_1";
+		};
+	};
+
+	uart1_pins: uart1-pins-g1 {
+		mux {
+			function = "uart";
+			groups = "uart1_1";
+		};
+	};
+
+	uart2_pins: uart2-pins-g1 {
+		mux {
+			function = "uart";
+			groups = "uart2_1";
+		};
+	};
+};
+
+&watchdog {
+	status = "okay";
+};
+
+&wifi {
+	nvmem-cells = <&eeprom_factory_0>, <&precal_factory_1010>;
+	nvmem-cell-names = "eeprom", "precal";
+
+	status = "okay";
+};

target/linux/mediatek/filogic/base-files/etc/board.d/01_leds

@@ -21,6 +21,7 @@ acer,predator-w6x-ubootmod)
 	ucidef_set_led_netdev "wan" "wan" "rgb:status" "eth1"
 	;;
 asus,rt-ax52|\
+asus,rt-ax57m|\
 snr,snr-cpe-ax2)
 	ucidef_set_led_netdev "wan" "wan" "blue:wan" "wan" "link tx rx"
 	;;

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

@@ -44,6 +44,7 @@ case "$board" in
 			/sys${DEVPATH}/macaddress
 		;;
 	asus,rt-ax52|\
+	asus,rt-ax57m|\
 	asus,tuf-ax4200|\
 	asus,tuf-ax4200q|\
 	asus,tuf-ax6000)

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

@@ -141,6 +141,7 @@ platform_do_upgrade() {
 		emmc_do_upgrade "$1"
 		;;
 	asus,rt-ax52|\
+	asus,rt-ax57m|\
 	asus,rt-ax59u|\
 	asus,tuf-ax4200|\
 	asus,tuf-ax4200q|\
@@ -368,6 +369,7 @@ platform_pre_upgrade() {
 
 	case "$board" in
 	asus,rt-ax52|\
+	asus,rt-ax57m|\
 	asus,rt-ax59u|\
 	asus,tuf-ax4200|\
 	asus,tuf-ax4200q|\

target/linux/mediatek/image/filogic.mk

@@ -392,6 +392,37 @@ endif
 endef
 TARGET_DEVICES += asus_rt-ax52
 
+define Device/asus_rt-ax57m
+  DEVICE_VENDOR := ASUS
+  DEVICE_MODEL := RT-AX57M
+  DEVICE_ALT0_VENDOR := ASUS
+  DEVICE_ALT0_MODEL := RT-AX54HP
+  DEVICE_ALT0_VARIANT := V2
+  DEVICE_ALT1_VENDOR := ASUS
+  DEVICE_ALT1_MODEL := RT-AX1800HP
+  DEVICE_ALT1_VARIANT := V2
+  DEVICE_ALT2_VENDOR := ASUS
+  DEVICE_ALT2_MODEL := RT-AX1800S
+  DEVICE_ALT2_VARIANT := V2
+  DEVICE_ALT3_VENDOR := ASUS
+  DEVICE_ALT3_MODEL := RT-AX3000S
+  DEVICE_DTS := mt7981b-asus-rt-ax57m
+  DEVICE_DTS_DIR := ../dts
+  DEVICE_PACKAGES := kmod-mt7915e kmod-mt7981-firmware mt7981-wo-firmware
+  IMAGES := sysupgrade.bin
+  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
+ifeq ($(IB),)
+  ARTIFACTS := initramfs.trx
+  ARTIFACT/initramfs.trx := append-image-stage initramfs-kernel.bin | \
+	uImage none | asus-trx -v 3 -n $$(DEVICE_MODEL)
+endif
+endef
+TARGET_DEVICES += asus_rt-ax57m
+
 define Device/asus_rt-ax59u
   DEVICE_VENDOR := ASUS
   DEVICE_MODEL := RT-AX59U