mediatek: filogic: add support for Cudy M3000 v1

Hardware:
  SoC:     MT7981b
  RAM:     256 MB
  Flash:   128 MB SPI NAND
  Ethernet:
    1x 2.5Gbps (rtl8221b)
    1x 1Gbps (integrated phy)
  WiFi:    2x2 MT7981
  Buttons: Reset, WPS
  LED:     1x multicolor

Solder on UART:
  - remove rubber ring on the bottom
  - remove screws
  - pull up the cylinder, maybe help by push on an ethernet socket with a screwdriver
  - remove the (3) screws holding the board in the frame
  - remove the board from the frame to get to the screws for the silver, flat heat shield
  - remove the (3) screws holding the heat shield
  - solder UART pins to the back of the board
    - make sure to have the pins point out on side with the black, finned heat spread
    - the markings for the pins are going to be below the silver heat shield
    - Vcc is not needed

If you don't intend on using the UART outside of the installation process, you might not
want to solder:

  - carefully scrape off the thin layer of epoxy on the holes (not the copper)
  - place your pin header with the UART attached in the holes
  - the pins, starting with the one closest to the socket:
    - Vcc (not required)
    - GND
    - RX
    - TX
  - either wedge the header or hold it with your fingers so that the pins stay in contact with the board

Installation (UART):
  - attach an Ethernet cable to the 1Gbps port (black) on the router
  - hold the reset button while powering the router
  - press CTRL-C or wait for the timeout to get to the U-Boot prompt
  - prepare a TFTP server on the network to supply ..-initramfs-kernel.bin
  - use 'tftpboot' in the U-Boot shell to pull the image
  - boot the image using 'bootm'
  - push the ..-sysupgrade to the router using your preferred method
  - perform the upgrade with 'sysupgrade -n'

There is a recovery mechanism that involves fetching a file called 'recovery.bin' but that is not understood yet.

Signed-off-by: Leon M. Busch-George <leon@georgemail.eu>

target/linux/mediatek/base-files/lib/preinit/05_set_preinit_iface

@@ -1,10 +1,6 @@
 set_preinit_iface() {
 	case $(board_name) in
-	smartrg,sdg-8622|\
-	smartrg,sdg-8632)
-		ip link set lan up
-		ifname=lan
-		;;
+	cudy,m3000-v1|\
 	cudy,tr3000-v1|\
 	glinet,gl-mt3000)
 		ip link set eth1 up
@@ -16,6 +12,11 @@ set_preinit_iface() {
 		ip link set eth0 up
 		ifname=eth0
 		;;
+	smartrg,sdg-8622|\
+	smartrg,sdg-8632)
+		ip link set lan up
+		ifname=lan
+		;;
 	xiaomi,mi-router-ax3000t|\
 	xiaomi,mi-router-ax3000t-ubootmod|\
 	xiaomi,mi-router-wr30u-stock|\

target/linux/mediatek/dts/mt7981b-cudy-m3000-v1.dts

@@ -0,0 +1,214 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+/dts-v1/;
+
+#include "mt7981.dtsi"
+
+/ {
+	model = "Cudy M3000 v1";
+	compatible = "cudy,m3000-v1", "mediatek,mt7981-spim-snand-rfb";
+
+	aliases {
+		ethernet0 = &gmac0;
+		label-mac-device = &gmac0;
+		led-boot = &led_status;
+		led-failsafe = &led_status;
+		led-running = &led_status;
+		led-upgrade = &led_status;
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	gpio-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_status: internet-white {
+			function = LED_FUNCTION_WAN_ONLINE;
+			color = <LED_COLOR_ID_WHITE>;
+			gpios = <&pio 10 GPIO_ACTIVE_LOW>;
+		};
+
+		internet-red {
+			function = LED_FUNCTION_WAN_ONLINE;
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&pio 4 GPIO_ACTIVE_LOW>;
+		};
+
+		wan {
+			function = LED_FUNCTION_WAN;
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&pio 5 GPIO_ACTIVE_LOW>;
+		};
+
+		lan {
+			function = LED_FUNCTION_LAN;
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&pio 9 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&watchdog {
+	status = "okay";
+};
+
+&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 = <&rtl8221b_phy>;
+
+		/* the MAC address assignment using nvmem-cells doesn't work, so it's done through 02_network */
+	};
+
+	gmac1: mac@1 {
+		compatible = "mediatek,eth-mac";
+		reg = <1>;
+		phy-mode = "gmii";
+		phy-handle = <&int_gbe_phy>;
+
+		nvmem-cell-names = "mac-address";
+		nvmem-cells = <&macaddr_bdinfo_de00 0>;
+	};
+};
+
+&mdio_bus {
+	rtl8221b_phy: ethernet-phy@1 {
+		compatible = "ethernet-phy-ieee802.3-c45";
+		reg = <1>;
+
+		reset-gpios = <&pio 39 GPIO_ACTIVE_LOW>;
+
+		interrupts = <38 IRQ_TYPE_LEVEL_LOW>;
+		reset-assert-us = <100000>;
+		reset-deassert-us = <100000>;
+	};
+};
+
+&spi0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0_flash_pins>;
+
+	status = "okay";
+
+	spi_nand: spi_nand@0 {
+		compatible = "spi-nand";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0>;
+
+		spi-max-frequency = <52000000>;
+		spi-tx-buswidth = <4>;
+		spi-rx-buswidth = <4>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			mediatek,nmbm;
+			mediatek,bmt-max-ratio = <1>;
+			mediatek,bmt-max-reserved-blocks = <64>;
+
+			partition@0 {
+				label = "BL2";
+				reg = <0x0000000 0x0100000>;
+				read-only;
+			};
+
+			partition@100000 {
+				label = "u-boot-env";
+				reg = <0x0100000 0x0080000>;
+			};
+
+			factory: partition@180000 {
+				label = "Factory";
+				reg = <0x0180000 0x0200000>;
+				read-only;
+			};
+
+			bdinfo: partition@380000 {
+				label = "bdinfo";
+				reg = <0x0380000 0x0040000>;
+				read-only;
+
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					macaddr_bdinfo_de00: macaddr@de00 {
+						#nvmem-cell-cells = <1>;
+						compatible = "mac-base";
+						reg = <0xde00 0x6>;
+					};
+				};
+			};
+
+			partition@3c0000 {
+				label = "FIP";
+				reg = <0x03c0000 0x0200000>;
+			};
+
+			partition@5c0000 {
+				label = "ubi";
+				reg = <0x05c0000 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 = <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";
+	mediatek,mtd-eeprom = <&factory 0x0>;
+};

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

@@ -53,9 +53,7 @@ mediatek_setup_interfaces()
 	comfast,cf-e393ax)
 		ucidef_set_interfaces_lan_wan "lan1" eth1
 		;;
-	dlink,aquila-pro-ai-m30-a1)
-		ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4" internet
-		;;
+	cudy,m3000-v1|\
 	cudy,tr3000-v1|\
 	glinet,gl-mt2500|\
 	glinet,gl-mt3000|\
@@ -64,6 +62,9 @@ mediatek_setup_interfaces()
 	openembed,som7981)
 		ucidef_set_interfaces_lan_wan eth1 eth0
 		;;
+	dlink,aquila-pro-ai-m30-a1)
+		ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4" internet
+		;;
 	glinet,gl-mt6000|\
 	tplink,tl-xdr4288|\
 	tplink,tl-xdr6088)
@@ -135,6 +136,9 @@ mediatek_setup_macs()
 		;;
 		esac
 		;;
+	cudy,m3000-v1)
+		wan_mac=$(macaddr_add $(cat /sys/class/net/eth1/address) 1)
+		;;
 	h3c,magic-nx30-pro)
 		wan_mac=$(mtd_get_mac_ascii pdt_data_1 ethaddr)
 		lan_mac=$(macaddr_add "$wan_mac" 1)

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

@@ -75,6 +75,7 @@ case "$board" in
 		[ "$PHYNBR" = "0" ] && echo "$addr" > /sys${DEVPATH}/macaddress
 		[ "$PHYNBR" = "1" ] && macaddr_setbit_la $(macaddr_add $addr 1) > /sys${DEVPATH}/macaddress
 		;;
+	cudy,m3000-v1|\
 	cudy,wr3000-v1)
 		addr=$(mtd_get_mac_binary bdinfo 0xde00)
 		# Originally, phy0 is phy1 mac with LA bit set. However, this would conflict

target/linux/mediatek/image/filogic.mk

@@ -466,6 +466,28 @@ define Device/confiabits_mt7981
 endef
 TARGET_DEVICES += confiabits_mt7981
 
+define Device/cudy_m3000-v1
+  DEVICE_VENDOR := Cudy
+  DEVICE_MODEL := M3000
+  DEVICE_VARIANT := v1
+  DEVICE_DTS := mt7981b-cudy-m3000-v1
+  DEVICE_DTS_DIR := ../dts
+  SUPPORTED_DEVICES += R37
+  DEVICE_DTS_LOADADDR := 0x44000000
+  BLOCKSIZE := 128k
+  PAGESIZE := 2048
+  IMAGE_SIZE := 65536k
+  KERNEL_IN_UBI := 1
+  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
+  IMAGES := sysupgrade.bin
+  IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
+  DEVICE_PACKAGES := kmod-mt7981-firmware mt7981-wo-firmware
+endef
+TARGET_DEVICES += cudy_m3000-v1
+
 define Device/cudy_re3000-v1
   DEVICE_VENDOR := Cudy
   DEVICE_MODEL := RE3000