mediatek: add support for Mercusys MR80X v3

This commit adds support for Mercusys MR80X(EU) v3 router.

Device specification:
 - SoC: Mediatek MT7981b, Cortex-A53, 64-bit
 - RAM: 512MB
 - Flash: SPI NAND GigaDevice GD5F1GQ5UEYIGY (128 MB)
 - Ethernet: 4x 100/1000 Mbps LAN1,LAN2,LAN3 & WAN
 - Wireless: 2.4GHz (802.11 b/g/n/ax)
 - Wireless: 5GHz (802.11 a/n/ac/ax)
 - LEDs: 1 orange and 1 green status LEDs, 4 green gpio-controlled LEDs
   on ethernet ports
 - Buttons: 1 (Reset)
 - Bootloader: Main U-Boot - U-Boot 2022.01-rc4. Additionally, both UBI
   slots contain "seconduboot" (also U-Boot 2022.01-rc4)

Installation (UART):
 - Place OpenWrt initramfs-kernel image on tftp server with IP 192.168.1.2
 - Attach UART, switch on the router and interrupt the boot process by
   pressing 'Ctrl-C'.
 - Set the uboot environment for startup.
   setenv tp_boot_idx 0; setenv bootcmd bootm 0x46000000; saveenv
   If the bootarg is set to boot from ubi1, also change it to ubi0.
 - Load and run OpenWrt initramfs image.
   setenv serverip 192.168.1.2; setenv ipaddr 192.168.1.1; tftpboot initramfs-kernel.bin; bootm
 - Browse IP 192.168.1.1, upload the 'sysupgrade' image and do upgrade.

Recovery:
 - Press Reset button and power on the router.
 - Navigate to U-Boot recovery web server (http://192.168.1.1/) and
   upload the OEM firmware.

Stock layout:
0x000000000000-0x000000200000 : "boot"
0x000000200000-0x000000300000 : "u-boot-env"
0x000000300000-0x000003500000 : "ubi0"
0x000003500000-0x000006700000 : "ubi1"
0x000006700000-0x000006f00000 : "userconfig"
0x000006f00000-0x000007300000 : "tp_data"

ubi0/ubi1 format:
U-Boot at boot checks that all volumes are in place:
+-------------------------------+
| Volume Name: uboot   Vol ID: 0|
| Volume Name: kernel  Vol ID: 1|
| Volume Name: rootfs  Vol ID: 2|
+-------------------------------+

MAC addresses:
+---------+-------------------+-----------+
|         | MAC               | Algorithm |
+---------+-------------------+-----------+
| label   | 94:0C:xx:xx:xx:12 | label     |
| WAN     | 94:0C:xx:xx:xx:13 | label+1   |
| LAN     | 94:0C:xx:xx:xx:12 | label     |
| WLAN 2g | 94:0C:xx:xx:xx:11 | label-1   |
| WLAN 5g | 94:0C:xx:xx:xx:10 | label-2   |
+---------+-------------------+-----------+
label MAC address was found in UBI partition "tp_data", file
"default-mac".

Signed-off-by: Schneider Azima <Schneider-Azima12@protonmail.com>
Link: https://github.com/openwrt/openwrt/pull/18181
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

package/boot/uboot-tools/uboot-envtools/files/mediatek_filogic

@@ -111,6 +111,7 @@ gatonetworks,gdsp)
 glinet,gl-mt3000)
 	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x80000" "0x20000"
 	;;
+mercusys,mr80x-v3|\
 mercusys,mr90x-v1|\
 routerich,ax3000|\
 tenbay,wr3000k|\

target/linux/mediatek/dts/mt7981b-mercusys-mr80x-v3.dts

@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/dts-v1/;
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+
+#include "mt7981.dtsi"
+/ {
+	model = "MERCUSYS MR80X v3";
+	compatible = "mercusys,mr80x-v3", "mediatek,mt7981";
+
+	aliases {
+		led-boot = &led_status_green;
+		led-failsafe = &led_status_amber;
+		led-running = &led_status_green;
+		led-upgrade = &led_status_green;
+
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory {
+		reg = <0 0x40000000 0 0x20000000>;
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		button-reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&pio 1 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_status_amber: led-0 {
+			color = <LED_COLOR_ID_AMBER>;
+			function = LED_FUNCTION_STATUS;
+			gpios = <&pio 4 GPIO_ACTIVE_LOW>;
+		};
+
+		led_status_green: led-1 {
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_STATUS;
+			gpios = <&pio 5 GPIO_ACTIVE_LOW>;
+		};
+
+		led-2 {
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_LAN;
+			function-enumerator = <1>;
+			gpios = <&pio 6 GPIO_ACTIVE_LOW>;
+		};
+
+		led-3 {
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_LAN;
+			function-enumerator = <2>;
+			gpios = <&pio 7 GPIO_ACTIVE_LOW>;
+		};
+
+		led-4 {
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_WAN;
+			gpios = <&pio 9 GPIO_ACTIVE_LOW>;
+		};
+
+		led-5 {
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_LAN;
+			function-enumerator = <3>;
+			gpios = <&pio 10 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&watchdog {
+	status = "okay";
+};
+
+&eth {
+	status = "okay";
+
+	gmac0: mac@0 {
+		compatible = "mediatek,eth-mac";
+		reg = <0>;
+		phy-mode = "2500base-x";
+
+		fixed-link {
+			speed = <2500>;
+			full-duplex;
+			pause;
+		};
+	};
+
+	gmac1: mac@1 {
+		compatible = "mediatek,eth-mac";
+		reg = <1>;
+		phy-mode = "gmii";
+		phy-handle = <&int_gbe_phy>;
+	};
+
+	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@1 {
+					reg = <1>;
+					label = "lan1";
+				};
+
+				port@2 {
+					reg = <2>;
+					label = "lan2";
+				};
+
+				port@3 {
+					reg = <3>;
+					label = "lan3";
+				};
+
+				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: spi_nand@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "spi-nand";
+		reg = <0>;
+		spi-max-frequency = <52000000>;
+		spi-tx-bus-width = <4>;
+		spi-rx-bus-width = <4>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "boot";
+				reg = <0x00000 0x0200000>;
+				read-only;
+			};
+
+			partition@200000 {
+				label = "u-boot-env";
+				reg = <0x0200000 0x0100000>;
+			};
+
+			partition@300000 {
+				label = "ubi0";
+				reg = <0x300000 0x3200000>;
+			};
+
+			partition@3500000 {
+				label = "ubi1";
+				reg = <0x3500000 0x3200000>;
+				read-only;
+			};
+
+			partition@6700000 {
+				label = "userconfig";
+				reg = <0x6700000 0x800000>;
+				read-only;
+			};
+
+			partition@6f00000 {
+				label = "tp_data";
+				reg = <0x6f00000 0x800000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&pio {
+	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>;
+		};
+	};
+};
+
+&wifi {
+	status = "okay";
+};

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

@@ -72,6 +72,12 @@ glinet,gl-xe3000)
 huasifei,wh3000)
 	ucidef_set_led_netdev "wan" "WAN" "red:wan" "eth1" "link tx rx"
 	;;
+mercusys,mr80x-v3)
+	ucidef_set_led_netdev "lan1" "lan-1" "green:lan-1" "lan1" "link tx rx"
+	ucidef_set_led_netdev "lan2" "lan-2" "green:lan-2" "lan2" "link tx rx"
+	ucidef_set_led_netdev "lan3" "lan-3" "green:lan-3" "lan3" "link tx rx"
+	ucidef_set_led_netdev "wan" "wan" "green:wan" "wan" "link tx rx"
+	;;
 mercusys,mr90x-v1|\
 mercusys,mr90x-v1-ubi)
 	ucidef_set_led_netdev "lan-0" "lan-0" "green:lan-0" "lan0" "link tx rx"

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

@@ -13,6 +13,7 @@ mediatek_setup_interfaces()
 	h3c,magic-nx30-pro|\
 	netis,nx31|\
 	nokia,ea0326gmp|\
+	mercusys,mr80x-v3|\
 	zbtlink,zbt-z8103ax)
 		ucidef_set_interfaces_lan_wan "lan1 lan2 lan3" eth1
 		;;
@@ -169,6 +170,12 @@ mediatek_setup_macs()
 		lan_mac=$(macaddr_add "$wan_mac" 1)
 		label_mac=$wan_mac
 		;;
+	mercusys,mr80x-v3)
+		mac_dirty=$(cat "/tmp/tp_data/default-mac" | sed -n 's/^'"MAC"'://p')
+		label_mac=$(macaddr_canonicalize "$mac_dirty")
+		lan_mac=$label_mac
+		wan_mac=$(macaddr_add "$lan_mac" 1)
+		;;
 	mercusys,mr90x-v1|\
 	tplink,re6000xd)
 		label_mac=$(get_mac_binary "/tmp/tp_data/default-mac" 0)

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

@@ -9,6 +9,10 @@ board=$(board_name)
 case "$FIRMWARE" in
 "mediatek/mt7981_eeprom_mt7976_dbdc.bin")
 	case "$board" in
+	mercusys,mr80x-v3)
+		ln -sf /tmp/tp_data/MT7981_EEPROM.bin \
+			/lib/firmware/$FIRMWARE
+		;;
 	ubnt,unifi-6-plus)
 		caldata_extract_mmc "factory" 0x0 0x1000
 		;;

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

@@ -119,6 +119,12 @@ case "$board" in
 		[ "$PHYNBR" = "1" ] && \
 			macaddr_setbit_la "$(mtd_get_mac_binary rf-eeprom 0x4)" > /sys${DEVPATH}/macaddress
 		;;
+	mercusys,mr80x-v3)
+		mac_dirty=$(cat "/tmp/tp_data/default-mac" | sed -n 's/^'"MAC"'://p')
+		label_mac=$(macaddr_canonicalize "$mac_dirty")
+		[ "$PHYNBR" = "0" ] && macaddr_add $label_mac -1 > /sys${DEVPATH}/macaddress
+		[ "$PHYNBR" = "1" ] && macaddr_add $label_mac -2 > /sys${DEVPATH}/macaddress
+		;;
 	mercusys,mr90x-v1|\
 	tplink,re6000xd)
 		addr=$(get_mac_binary "/tmp/tp_data/default-mac" 0)

target/linux/mediatek/filogic/base-files/lib/preinit/09_mount_cfg_part

@@ -12,6 +12,7 @@ mount_ubi_part() {
 
 preinit_mount_cfg_part() {
 	case $(board_name) in
+	mercusys,mr80x-v3|\
 	mercusys,mr90x-v1|\
 	tplink,re6000xd)
 		mount_ubi_part "tp_data"

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

@@ -140,6 +140,7 @@ platform_do_upgrade() {
 		fw_setenv sw_tryactive 0
 		nand_do_upgrade "$1"
 		;;
+	mercusys,mr80x-v3|\
 	mercusys,mr90x-v1|\
 	tplink,re6000xd)
 		CI_UBIPART="ubi0"

target/linux/mediatek/image/filogic.mk

@@ -1221,6 +1221,20 @@ define Device/mediatek_mt7988a-rfb
 endef
 TARGET_DEVICES += mediatek_mt7988a-rfb
 
+define Device/mercusys_mr80x-v3
+  DEVICE_VENDOR := MERCUSYS
+  DEVICE_MODEL := MR80X
+  DEVICE_VARIANT := v3
+  DEVICE_DTS := mt7981b-mercusys-mr80x-v3
+  DEVICE_DTS_DIR := ../dts
+  DEVICE_PACKAGES := kmod-mt7915e kmod-mt7981-firmware mt7981-wo-firmware
+  UBINIZE_OPTS := -E 5
+  BLOCKSIZE := 128k
+  PAGESIZE := 2048
+  IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
+endef
+TARGET_DEVICES += mercusys_mr80x-v3
+
 define Device/mercusys_mr90x-v1
   DEVICE_VENDOR := MERCUSYS
   DEVICE_MODEL := MR90X v1