mediatek: filogic: add Unielec U7981-01 support

Hardware specification:
  SoC: MediaTek MT7981B 2x A53
  Flash: 8GB eMMC or 128 MB SPI-NAND
  RAM: 256MB
  Ethernet: 5x 10/100/1000 Mbps
  Switch: MediaTek MT7531AE
  WiFi: MediaTek MT7976C
  Button: Reset
  USB: M.2(B-key) for 4G/5G Module
  Power: DC 12V 1A
  UART: 3.3v, 115200n8
  --------------------------
  |         Layout         |
  |   -----------------    |
  | 4 | VCC RX TX GND | <= |
  |   -----------------    |
  --------------------------

The U-boot menu will automatically appear at startup, and then select
the required options through UP/DOWN Key.

NAND Flash and eMMC Flash instructions:
1. Set your computers IP adress to 192.168.1.2.
2. Run a TFTP server providing the sysupgrade.bin image.
3. Power on the router, into the U-Boot menu.
4. Select "2. Upgrade firmware"
5. Update sysupgrade.bin file name, input server IP and input device
   IP (if they deviate from the defaults)
6. Wait for automatic startup after burning

Signed-off-by: Allen Zhao <allenzhao@unielecinc.com>
(cherry picked from commit 640b0b79ff05c42991e99a49ed81efb3fac25045)

6 files changed, 379 insertions, 0 deletions

diff --git a/target/linux/mediatek/dts/mt7981b-unielec-u7981-01-emmc.dts b/target/linux/mediatek/dts/mt7981b-unielec-u7981-01-emmc.dts
new file mode 100644
index 0000000000..abd4d4e59d
--- /dev/null
+++ b/target/linux/mediatek/dts/mt7981b-unielec-u7981-01-emmc.dts
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (C) 2023 Allen Zhao <allenzhao@unielecinc.com>
+ */
+
+/dts-v1/;
+#include "mt7981b-unielec-u7981-01.dtsi"
+/ {
+	model = "Unielec U7981-01 (EMMC)";
+	compatible = "unielec,u7981-01-emmc", "mediatek,mt7981";
+};
+
+&mmc0 {
+	pinctrl-names = "default", "state_uhs";
+	pinctrl-0 = <&mmc0_pins_default>;
+	pinctrl-1 = <&mmc0_pins_uhs>;
+	bus-width = <8>;
+	max-frequency = <52000000>;
+	cap-mmc-highspeed;
+	vmmc-supply = <&reg_3p3v>;
+	non-removable;
+	status = "okay";
+
+	card@0 {
+		compatible = "mmc-card";
+		reg = <0>;
+
+		block {
+			compatible = "block-device";
+			partitions {
+				block-partition-env {
+					partname = "u-boot-env";
+
+					nvmem-layout {
+						compatible = "u-boot,env-layout";
+					};
+				};
+
+				block-partition-factory {
+					partname = "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 {
+							compatible = "mac-base";
+							reg = <0x4 0x6>;
+							#nvmem-cell-cells = <1>;
+						};
+
+						macaddr_factory_1000: macaddr@1000 {
+							compatible = "mac-base";
+							reg = <0x1000 0x6>;
+							#nvmem-cell-cells = <1>;
+						};
+					};
+				};
+			};
+		};
+	};
+};
+
+&pio {
+	mmc0_pins_default: mmc0-pins-default {
+		mux {
+			function = "flash";
+			groups = "emmc_45";
+		};
+	};
+
+	mmc0_pins_uhs: mmc0-pins-uhs {
+		mux {
+			function = "flash";
+			groups = "emmc_45";
+		};
+	};
+};
+
+&gmac0 {
+	nvmem-cells = <&macaddr_factory_1000 0>;
+	nvmem-cell-names = "mac-address";
+};
+
+&gmac1 {
+	nvmem-cells = <&macaddr_factory_1000 1>;
+	nvmem-cell-names = "mac-address";
+};
+
+&wifi {
+	nvmem-cells = <&eeprom_factory_0>;
+	nvmem-cell-names = "eeprom";
+	status = "okay";
+};
diff --git a/target/linux/mediatek/dts/mt7981b-unielec-u7981-01-nand.dts b/target/linux/mediatek/dts/mt7981b-unielec-u7981-01-nand.dts
new file mode 100644
index 0000000000..230a612a34
--- /dev/null
+++ b/target/linux/mediatek/dts/mt7981b-unielec-u7981-01-nand.dts
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (C) 2023 Allen Zhao <allenzhao@unielecinc.com>
+ */
+
+/dts-v1/;
+#include "mt7981b-unielec-u7981-01.dtsi"
+/ {
+	model = "Unielec U7981-01 (NAND)";
+	compatible = "unielec,u7981-01-nand", "mediatek,mt7981";
+};
+
+&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-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 = <0x00000 0x0100000>;
+				read-only;
+			};
+
+			partition@100000 {
+				label = "u-boot-env";
+				reg = <0x0100000 0x0080000>;
+			};
+
+			factory: partition@180000 {
+				label = "factory";
+				reg = <0x180000 0x200000>;
+				read-only;
+
+				compatible = "nvmem-cells";
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					eeprom_factory_0: eeprom@0 {
+						reg = <0x0 0x1000>;
+					};
+
+					macaddr_factory_1000: macaddr@1000 {
+						compatible = "mac-base";
+						reg = <0x1000 0x6>;
+						#nvmem-cell-cells = <1>;
+					};
+				};
+			};
+
+			partition@380000 {
+				label = "fip";
+				reg = <0x380000 0x0200000>;
+			};
+
+			partition@580000 {
+				label = "ubi";
+				reg = <0x580000 0x4000000>;
+			};
+		};
+	};
+};
+
+&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>; /* bias-disable */
+		};
+
+		conf-pd {
+			pins = "SPI0_CLK", "SPI0_MOSI", "SPI0_MISO";
+			drive-strength = <8>;
+			mediatek,pull-up-adv = <0>; /* bias-disable */
+		};
+	};
+};
+
+&gmac0 {
+	nvmem-cells = <&macaddr_factory_1000 0>;
+	nvmem-cell-names = "mac-address";
+};
+
+&gmac1 {
+	nvmem-cells = <&macaddr_factory_1000 1>;
+	nvmem-cell-names = "mac-address";
+};
+
+&wifi {
+	nvmem-cells = <&eeprom_factory_0>;
+	nvmem-cell-names = "eeprom";
+	status = "okay";
+};
diff --git a/target/linux/mediatek/dts/mt7981b-unielec-u7981-01.dtsi b/target/linux/mediatek/dts/mt7981b-unielec-u7981-01.dtsi
new file mode 100644
index 0000000000..6e6150ba21
--- /dev/null
+++ b/target/linux/mediatek/dts/mt7981b-unielec-u7981-01.dtsi
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (C) 2023 Allen Zhao <allenzhao@unielecinc.com>
+ */
+
+/dts-v1/;
+#include "mt7981.dtsi"
+/ {
+	model = "Unielec U7981-01 (EMMC)";
+	compatible = "unielec,u7981-01-emmc", "mediatek,mt7981";
+
+	chosen {
+		bootargs = "console=ttyS0,115200n1 loglevel=8  \
+				earlycon=uart8250,mmio32,0x11002000 \
+				";
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&pio 1 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&watchdog {
+	status = "okay";
+};
+
+&eth {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mdio_pins &gbe_led0_pins &gbe_led1_pins>;
+	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 = "gmii";
+		phy-handle = <&int_gbe_phy>;
+	};
+};
+
+&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>;
+	};
+};
+
+&switch {
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+			label = "lan1";
+		};
+
+		port@1 {
+			reg = <1>;
+			label = "lan2";
+		};
+
+		port@2 {
+			reg = <2>;
+			label = "lan3";
+		};
+
+		port@3 {
+			reg = <3>;
+			label = "lan4";
+		};
+
+		port@6 {
+			reg = <6>;
+			label = "cpu";
+			ethernet = <&gmac0>;
+			phy-mode = "2500base-x";
+
+			fixed-link {
+				speed = <2500>;
+				full-duplex;
+				pause;
+			};
+		};
+	};
+};
+
+&usb_phy {
+	status = "okay";
+};
+
+&xhci {
+	mediatek,u3p-dis-msk = <0x0>;
+	phys = <&u2port0 PHY_TYPE_USB2>,
+	       <&u3port0 PHY_TYPE_USB3>;
+	status = "okay";
+};
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 566a5ca82f..8843f05682 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
@@ -25,6 +25,7 @@ mediatek_setup_interfaces()
 		;;
 	asus,tuf-ax4200|\
 	mediatek,mt7981-rfb|\
+	unielec,u7981-01*|\
 	zbtlink,zbt-z8102ax)
 		ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4" eth1
 		;;
diff --git a/target/linux/mediatek/filogic/base-files/lib/upgrade/platform.sh b/target/linux/mediatek/filogic/base-files/lib/upgrade/platform.sh
index 25cbf98f33..aae78647d0 100755
--- a/target/linux/mediatek/filogic/base-files/lib/upgrade/platform.sh
+++ b/target/linux/mediatek/filogic/base-files/lib/upgrade/platform.sh
@@ -148,6 +148,23 @@ platform_do_upgrade() {
 		CI_ROOTPART="ubi_rootfs"
                 nand_do_upgrade "$1"
                 ;;
+	unielec,u7981-01*)
+		local rootdev="$(cmdline_get_var root)"
+		rootdev="${rootdev##*/}"
+		rootdev="${rootdev%p[0-9]*}"
+		case "$rootdev" in
+		mmc*)
+			CI_ROOTDEV="$rootdev"
+			CI_KERNPART="kernel"
+			CI_ROOTPART="rootfs"
+			emmc_do_upgrade "$1"
+			;;
+		*)
+			CI_KERNPART="fit"
+			nand_do_upgrade "$1"
+			;;
+		esac
+		;;
 	*)
 		nand_do_upgrade "$1"
 		;;
diff --git a/target/linux/mediatek/image/filogic.mk b/target/linux/mediatek/image/filogic.mk
index 5598a70aca..3a8f67dcad 100644
--- a/target/linux/mediatek/image/filogic.mk
+++ b/target/linux/mediatek/image/filogic.mk
@@ -694,6 +694,28 @@ define Device/ubnt_unifi-6-plus
 endef
 TARGET_DEVICES += ubnt_unifi-6-plus
 
+define Device/unielec_u7981-01
+  DEVICE_VENDOR := Unielec
+  DEVICE_MODEL := U7981-01
+  DEVICE_DTS_DIR := ../dts
+  DEVICE_PACKAGES := kmod-mt7981-firmware mt7981-wo-firmware kmod-usb3 e2fsprogs f2fsck mkf2fs fdisk partx-utils
+  IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
+endef
+
+define Device/unielec_u7981-01-emmc
+  DEVICE_DTS := mt7981b-unielec-u7981-01-emmc
+  DEVICE_VARIANT := (EMMC)
+  $(call Device/unielec_u7981-01)
+endef
+TARGET_DEVICES += unielec_u7981-01-emmc
+
+define Device/unielec_u7981-01-nand
+  DEVICE_DTS := mt7981b-unielec-u7981-01-nand
+  DEVICE_VARIANT := (NAND)
+  $(call Device/unielec_u7981-01)
+endef
+TARGET_DEVICES += unielec_u7981-01-nand
+
 define Device/xiaomi_mi-router-wr30u-112m-nmbm
   DEVICE_VENDOR := Xiaomi
   DEVICE_MODEL := Mi Router WR30U (112M UBI with NMBM-Enabled layout)