mediatek: add support for OpenEmbed SOM7981

Hardware specification:
  SoC: MediaTek MT7981B 2x A53
  Flash: 256 MiB SPI-NAND, 32 GB eMMC optional
  RAM: 0.5/1 GB DDR4
  Ethernet: 1x 1GbE, 1x 2.5GbE (RTL8221B)
  WiFi: MediaTek MT7976C
  USB: 1x USB 3.0
  GPIO: 26-Pin header
  UART: 6 GND, 8 TX, 10 RX (in Pin header)
  Button: Reset, WPS
  Power: Type-C PD

Installation:
The board comes with a third-party custom OpenWrt image, you can upload
sysupgrade image via LuCI directly WITHOUT keeping configurations.

Or power on the board with pressing reset button for 5 second, then visit
http://192.168.1.1 and upload -factory.bin firmware.

Signed-off-by: Tianling Shen <cnsztl@gmail.com>

package/boot/uboot-envtools/files/mediatek_filogic

@@ -107,6 +107,10 @@ routerich,ax3000)
 	local envdev=/dev/mtd$(find_mtd_index "u-boot-env")
 	ubootenv_add_uci_config "$envdev" "0x0" "0x20000" "0x20000" "1"
 	;;
+openembed,som7981)
+	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x80000" "0x80000"
+	ubootenv_add_uci_sys_config "/dev/mtd3" "0x0" "0x100000" "0x100000"
+	;;
 ubnt,unifi-6-plus)
 	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x80000" "0x10000"
 	;;

target/linux/mediatek/dts/mt7981b-openembed-som7981.dts

@@ -0,0 +1,227 @@
+// 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 <dt-bindings/leds/common.h>
+#include "mt7981.dtsi"
+
+/ {
+	model = "OpenEmbed SOM7981";
+	compatible = "openembed,som7981", "mediatek,mt7981";
+
+	aliases {
+		led-boot = &wlan2g_led;
+		led-failsafe = &wlan2g_led;
+		led-upgrade = &wlan2g_led;
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@40000000 {
+		reg = <0 0x40000000 0 0x40000000>;
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		button-reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&pio 1 GPIO_ACTIVE_LOW>;
+		};
+
+		button-wps {
+			label = "wps";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&pio 0 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		led-0 {
+			function = LED_FUNCTION_LAN;
+			color = <LED_COLOR_ID_AMBER>;
+			gpios = <&pio 8 GPIO_ACTIVE_LOW>;
+		};
+
+		led-1 {
+			function = LED_FUNCTION_LAN;
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&pio 13 GPIO_ACTIVE_LOW>;
+		};
+
+		wlan2g_led: led-2 {
+			function = LED_FUNCTION_WLAN_2GHZ;
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&pio 34 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy0tpt";
+		};
+
+		led-3 {
+			function = LED_FUNCTION_WLAN_5GHZ;
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&pio 35 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy1tpt";
+		};
+	};
+};
+
+&eth {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mdio_pins>;
+	status = "okay";
+
+	gmac0: mac@0 {
+		compatible = "mediatek,eth-mac";
+		reg = <0>;
+		phy-mode = "2500base-x";
+		phy-handle = <&phy0>;
+		nvmem-cells = <&macaddr_factory_a 0>;
+		nvmem-cell-names = "mac-address";
+	};
+
+	gmac1: mac@1 {
+		compatible = "mediatek,eth-mac";
+		reg = <1>;
+		phy-mode = "gmii";
+		phy-handle = <&int_gbe_phy>;
+		nvmem-cells = <&macaddr_factory_a 1>;
+		nvmem-cell-names = "mac-address";
+	};
+};
+
+&mdio_bus {
+	phy0: ethernet-phy@5 {
+		reg = <5>;
+		compatible = "ethernet-phy-ieee802.3-c45";
+		phy-mode = "2500base-x";
+		reset-gpios = <&pio 14 GPIO_ACTIVE_LOW>;
+		reset-assert-us = <10000>;
+		reset-deassert-us = <50000>;
+		realtek,aldps-enable;
+	};
+};
+
+&spi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0_flash_pins>;
+	status = "okay";
+
+	spi_nand: flash@0 {
+		compatible = "spi-nand";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		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 = "bl2";
+				reg = <0x000000 0x100000>;
+				read-only;
+			};
+
+			partition@100000 {
+				label = "u-boot-env";
+				reg = <0x100000 0x80000>;
+			};
+
+			partition@180000 {
+				compatible = "nvmem-cells";
+				label = "factory";
+				reg = <0x180000 0x100000>;
+				read-only;
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					eeprom_factory_0: eeprom@0 {
+						reg = <0x0 0x1000>;
+					};
+
+					macaddr_factory_a: macaddr@a {
+						compatible = "mac-base";
+						reg = <0xa 0x6>;
+						#nvmem-cell-cells = <1>;
+					};
+				};
+			};
+
+			partition@280000 {
+				label = "config";
+				reg = <0x280000 0x100000>;
+				read-only;
+			};
+
+			partition@380000 {
+				label = "fip";
+				reg = <0x380000 0x200000>;
+				read-only;
+			};
+
+			partition@580000 {
+				label = "ubi";
+				reg = <0x580000 0xf880000>;
+			};
+		};
+	};
+};
+
+&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 = <8>;
+			mediatek,pull-up-adv = <0>;
+		};
+
+		conf-pd {
+			pins = "SPI0_CLK", "SPI0_MOSI", "SPI0_MISO";
+			drive-strength = <8>;
+			mediatek,pull-down-adv = <0>;
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&usb_phy {
+	status = "okay";
+};
+
+&watchdog {
+	status = "okay";
+};
+
+&wifi {
+	nvmem-cells = <&eeprom_factory_0>;
+	nvmem-cell-names = "eeprom";
+	status = "okay";
+};
+
+&xhci {
+	status = "okay";
+};

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

@@ -54,6 +54,10 @@ netgear,wax220)
 	ucidef_set_led_netdev "wlan2g" "WLAN2G" "blue:wlan2g" "phy0-ap0"
 	ucidef_set_led_netdev "wlan5g" "WLAN5G" "blue:wlan5g" "phy1-ap0"
 	;;
+openembed,som7981)
+	ucidef_set_led_netdev "lanact" "LANACT" "green:lan" "eth1" "rx tx"
+	ucidef_set_led_netdev "lanlink" "LANLINK" "amber:lan" "eth1" "link"
+	;;
 routerich,ax3000)
 	ucidef_set_led_netdev "lan-1" "lan-1" "blue:lan-1" "lan1" "link tx rx"
 	ucidef_set_led_netdev "lan-2" "lan-2" "blue:lan-2" "lan2" "link tx rx"

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

@@ -57,7 +57,8 @@ mediatek_setup_interfaces()
 	glinet,gl-mt2500|\
 	glinet,gl-mt3000|\
 	glinet,gl-x3000|\
-	glinet,gl-xe3000)
+	glinet,gl-xe3000|\
+	openembed,som7981)
 		ucidef_set_interfaces_lan_wan eth1 eth0
 		;;
 	glinet,gl-mt6000|\

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

@@ -109,6 +109,9 @@ case "$board" in
 		[ "$PHYNBR" = "0" ] && macaddr_add $hw_mac_addr 2 > /sys${DEVPATH}/macaddress
 		[ "$PHYNBR" = "1" ] && macaddr_add $hw_mac_addr 3 > /sys${DEVPATH}/macaddress
 		;;
+	openembed,som7981)
+		[ "$PHYNBR" = "1" ] && cat /sys/class/net/eth0/address > /sys${DEVPATH}/macaddress
+		;;
 	qihoo,360t7)
 		addr=$(mtd_get_mac_ascii factory lanMac)
 		[ "$PHYNBR" = "0" ] && macaddr_add $addr 2 > /sys${DEVPATH}/macaddress

target/linux/mediatek/image/filogic.mk

@@ -863,6 +863,23 @@ define Device/netgear_wax220
 endef
 TARGET_DEVICES += netgear_wax220
 
+define Device/openembed_som7981
+  DEVICE_VENDOR := OpenEmbed
+  DEVICE_MODEL := SOM7981
+  DEVICE_DTS := mt7981b-openembed-som7981
+  DEVICE_DTS_DIR := ../dts
+  DEVICE_PACKAGES := kmod-mt7981-firmware mt7981-wo-firmware kmod-usb3
+  UBINIZE_OPTS := -E 5
+  BLOCKSIZE := 128k
+  PAGESIZE := 2048
+  IMAGE_SIZE := 244224k
+  KERNEL_IN_UBI := 1
+  IMAGES += factory.bin
+  IMAGE/factory.bin := append-ubi | check-size $$$$(IMAGE_SIZE)
+  IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
+endef
+TARGET_DEVICES += openembed_som7981
+
 define Device/qihoo_360t7
   DEVICE_VENDOR := Qihoo
   DEVICE_MODEL := 360T7