mediatek: add CMCC RAX3000M support

Hardware specification:
  SoC: MediaTek MT7981B 2x A53
  Flash: 64GB eMMC or 128 MB SPI-NAND
  RAM: 512MB
  Ethernet: 4x 10/100/1000 Mbps
  Switch: MediaTek MT7531AE
  WiFi: MediaTek MT7976C
  Button: Reset, Mesh
  Power: DC 12V 1A
- UART: 3.3v, 115200n8
  --------------------------
  |         Layout         |
  |   -----------------    |
  | 4 | GND TX VCC RX | <= |
  |   -----------------    |
  --------------------------

Gain SSH access:
1. Login into web interface, and download the configuration.
2. Enter fakeroot, decompress the configuration:
   tar -zxf cfg_export_config_file.conf
3. Edit 'etc/config/dropbear', set 'enable' to '1'.
4. Edit 'etc/shadow', update (remove) root password:
   'root::19523:0:99999:7:::'
5. Repack 'etc' directory:
   tar -zcf cfg_export_config_file.conf etc/
   * If you find an error about 'etc/wireless/mediatek/DBDC_card0.dat',
     just ignore it.
6. Upload new configuration via web interface, now you can SSH to RAX3000M.

Check stroage type:
Check the label on the back of the device:
"CH EC CMIIT ID: xxxx" is eMMC version
"CH    CMIIT ID: xxxx" is NAND version

eMMC Flash instructions:
1. SSH to RAX3000M, and backup everything, especially 'factory' part.
   ('data' partition can be ignored, it's useless.)
2. Write new GPT table:
   dd if=openwrt-mediatek-filogic-cmcc_rax3000m-emmc-gpt.bin of=/dev/mmcblk0 bs=512 seek=0 count=34 conv=fsync
3. Erase and write new BL2:
   echo 0 > /sys/block/mmcblk0boot0/force_ro
   dd if=/dev/zero of=/dev/mmcblk0boot0 bs=512 count=8192 conv=fsync
   dd if=openwrt-mediatek-filogic-cmcc_rax3000m-emmc-preloader.bin of=/dev/mmcblk0boot0 bs=512 conv=fsync
4. Erase and write new FIP:
   dd if=/dev/zero of=/dev/mmcblk0 bs=512 seek=13312 count=8192 conv=fsync
   dd if=openwrt-mediatek-filogic-cmcc_rax3000m-emmc-bl31-uboot.fip of=/dev/mmcblk0 bs=512 seek=13312 conv=fsync
5. Set static IP on your PC:
   IP 192.168.1.254, GW 192.168.1.1
6. Serve OpenWrt initramfs image using TFTP server.
7. Cut off the power and re-engage, wait for TFTP recovery to complete.
8. After OpenWrt has booted, perform sysupgrade.
9. Additionally, if you want to have eMMC recovery boot feature:
     (Don't worry! You will always have TFTP recovery boot feature.)
   dd if=openwrt-mediatek-filogic-cmcc_rax3000m-initramfs-recovery.itb of=/dev/mmcblk0p4 bs=512 conv=fsync

NAND Flash instructions:
1. SSH to RAX3000M, and backup everything, especially 'Factory' part.
2. Erase and write new BL2:
   mtd erase BL2
   mtd write openwrt-mediatek-filogic-cmcc_rax3000m-nand-preloader.bin BL2
3. Erase and write new FIP:
   mtd erase FIP
   mtd write openwrt-mediatek-filogic-cmcc_rax3000m-nand-bl31-uboot.fip FIP
4. Set static IP on your PC:
   IP 192.168.1.254, GW 192.168.1.1
5. Serve OpenWrt initramfs image using TFTP server.
6. Cut off the power and re-engage, wait for TFTP recovery to complete.
7. After OpenWrt has booted, erase UBI volumes:
   ubidetach -p /dev/mtd0
   ubiformat -y /dev/mtd0
   ubiattach -p /dev/mtd0
8. Create new ubootenv volumes:
   ubimkvol /dev/ubi0 -n 0 -N ubootenv -s 128KiB
   ubimkvol /dev/ubi0 -n 1 -N ubootenv2 -s 128KiB
9. Additionally, if you want to have NAND recovery boot feature:
     (Don't worry! You will always have TFTP recovery boot feature.)
   ubimkvol /dev/ubi0 -n 2 -N recovery -s 20MiB
   ubiupdatevol /dev/ubi0_2 openwrt-mediatek-filogic-cmcc_rax3000m-initramfs-recovery.itb
10. Perform sysupgrade.

Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>

package/boot/uboot-envtools/files/mediatek_filogic

@@ -37,6 +37,23 @@ bananapi,bpi-r3)
 		;;
 	esac
 	;;
+cmcc,rax3000m)
+	case "$(cmdline_get_var root)" in
+	/dev/mmc*)
+		local envdev=$(find_mmc_part "ubootenv" "mmcblk0")
+		ubootenv_add_uci_config "$envdev" "0x0" "0x40000" "0x40000" "1"
+		ubootenv_add_uci_config "$envdev" "0x40000" "0x40000" "0x40000" "1"
+		;;
+	*)
+		. /lib/upgrade/nand.sh
+		local envubi=$(nand_find_ubi ubi)
+		local envdev=/dev/$(nand_find_volume $envubi ubootenv)
+		local envdev2=/dev/$(nand_find_volume $envubi ubootenv2)
+		ubootenv_add_uci_config "$envdev" "0x0" "0x1f000" "0x1f000" "1"
+		ubootenv_add_uci_config "$envdev2" "0x0" "0x1f000" "0x1f000" "1"
+		;;
+	esac
+	;;
 glinet,gl-mt3000)
 	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x80000" "0x20000"
 	;;

target/linux/mediatek/dts/mt7981b-cmcc-rax3000m-emmc.dtso

@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "cmcc,rax3000m", "mediatek,mt7981";
+
+	fragment@0 {
+		target = <&mmc0>;
+		__overlay__ {
+			bus-width = <8>;
+			max-frequency = <26000000>;
+			no-sd;
+			no-sdio;
+			non-removable;
+			pinctrl-names = "default", "state_uhs";
+			pinctrl-0 = <&mmc0_pins_default>;
+			pinctrl-1 = <&mmc0_pins_uhs>;
+			vmmc-supply = <&reg_3p3v>;
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&pio>;
+		__overlay__ {
+			mmc0_pins_default: mmc0-pins {
+				mux {
+					function = "flash";
+					groups = "emmc_45";
+				};
+			};
+
+			mmc0_pins_uhs: mmc0-uhs-pins {
+				mux {
+					function = "flash";
+					groups = "emmc_45";
+				};
+			};
+		};
+	};
+};

target/linux/mediatek/dts/mt7981b-cmcc-rax3000m-nand.dtso

@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "cmcc,rax3000m", "mediatek,mt7981";
+
+	fragment@0 {
+		target = <&gmac0>;
+		__overlay__ {
+			nvmem-cells = <&macaddr_factory_2a 0>;
+			nvmem-cell-names = "mac-address";
+		};
+	};
+
+	fragment@1 {
+		target = <&gmac1>;
+		__overlay__ {
+			nvmem-cells = <&macaddr_factory_24 0>;
+			nvmem-cell-names = "mac-address";
+		};
+	};
+
+	fragment@2 {
+		target = <&pio>;
+		__overlay__ {
+			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 */
+				};
+			};
+		};
+	};
+
+	fragment@3 {
+		target = <&spi0>;
+		__overlay__ {
+			pinctrl-names = "default";
+			pinctrl-0 = <&spi0_flash_pins>;
+			status = "okay";
+
+			spi_nand@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 = <0x00000 0x0100000>;
+						read-only;
+					};
+
+					partition@100000 {
+						label = "u-boot-env";
+						reg = <0x100000 0x80000>;
+					};
+
+					factory: partition@180000 {
+						label = "factory";
+						reg = <0x180000 0x200000>;
+						read-only;
+
+						compatible = "nvmem-cells";
+						nvmem-layout {
+							compatible = "fixed-layout";
+							#address-cells = <1>;
+							#size-cells = <1>;
+
+							macaddr_factory_24: macaddr@24 {
+								compatible = "mac-base";
+								reg = <0x24 0x6>;
+								#nvmem-cell-cells = <1>;
+							};
+
+							macaddr_factory_2a: macaddr@2a {
+								compatible = "mac-base";
+								reg = <0x2a 0x6>;
+								#nvmem-cell-cells = <1>;
+							};
+						};
+					};
+
+					partition@380000 {
+						label = "fip";
+						reg = <0x380000 0x200000>;
+						read-only;
+					};
+
+					partition@580000 {
+						label = "ubi";
+						reg = <0x580000 0x7200000>;
+					};
+				};
+			};
+		};
+	};
+
+	fragment@4 {
+		target = <&wifi>;
+		__overlay__ {
+			mediatek,mtd-eeprom = <&factory 0x0>;
+		};
+	};
+};

target/linux/mediatek/dts/mt7981b-cmcc-rax3000m.dts

@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (C) 2023 Tianling Shen <cnsztl@immortalwrt.org>
+ */
+
+/dts-v1/;
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "mt7981.dtsi"
+
+/ {
+	model = "CMCC RAX3000M";
+	compatible = "cmcc,rax3000m", "mediatek,mt7981";
+
+	aliases {
+		led-boot = &red_led;
+		led-failsafe = &red_led;
+		led-running = &green_led;
+		led-upgrade = &green_led;
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory {
+		reg = <0 0x40000000 0 0x20000000>;
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		button-reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&pio 1 GPIO_ACTIVE_LOW>;
+		};
+
+		button-mesh {
+			label = "mesh";
+			linux,code = <BTN_9>;
+			linux,input-type = <EV_SW>;
+			gpios = <&pio 0 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		green_led: led-0 {
+			label = "green:status";
+			gpios = <&pio 9 GPIO_ACTIVE_LOW>;
+		};
+
+		led-1 {
+			label = "blue:status";
+			gpios = <&pio 12 GPIO_ACTIVE_LOW>;
+		};
+
+		red_led: led-2 {
+			label = "red:status";
+			gpios = <&pio 35 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&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_bus {
+	switch: switch@0 {
+		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 = "lan3";
+		};
+
+		port@1 {
+			reg = <1>;
+			label = "lan2";
+		};
+
+		port@2 {
+			reg = <2>;
+			label = "lan1";
+		};
+
+		port@6 {
+			reg = <6>;
+			ethernet = <&gmac0>;
+			phy-mode = "2500base-x";
+
+			fixed-link {
+				speed = <2500>;
+				full-duplex;
+				pause;
+			};
+		};
+	};
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&usb_phy {
+	status = "okay";
+};
+
+&watchdog {
+	status = "okay";
+};
+
+&wifi {
+	status = "okay";
+};
+
+&xhci {
+	status = "okay";
+};

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

@@ -29,6 +29,7 @@ mediatek_setup_interfaces()
 	glinet,gl-mt3000)
 		ucidef_set_interfaces_lan_wan eth1 eth0
 		;;
+	cmcc,rax3000m|\
 	h3c,magic-nx30-pro)
 		ucidef_set_interfaces_lan_wan "lan1 lan2 lan3" eth1
 		;;
@@ -91,6 +92,15 @@ mediatek_setup_macs()
 		wan_mac=$(macaddr_add "$lan_mac" 3)
 		label_mac=$lan_mac
 		;;
+	cmcc,rax3000m)
+		case "$(cmdline_get_var root)" in
+		/dev/mmc*)
+			wan_mac=$(mmc_get_mac_binary factory 0x2a)
+			lan_mac=$(mmc_get_mac_binary factory 0x24)
+			label_mac=$wan_mac
+		;;
+		esac
+		;;
 	glinet,gl-mt6000)
 		label_mac=$(mmc_get_mac_binary factory 0x0a)
 		wan_mac=$label_mac

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

@@ -16,6 +16,13 @@ case "$FIRMWARE" in
 	;;
 "mediatek/mt7981_eeprom_mt7976_dbdc.bin")
 	case "$board" in
+	cmcc,rax3000m)
+		case "$(cmdline_get_var root)" in
+		/dev/mmc*)
+			caldata_extract_mmc "factory" 0x0 0x1000
+			;;
+		esac
+		;;
 	ubnt,unifi-6-plus)
 		caldata_extract_mmc "factory" 0x0 0x1000
 		;;

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

@@ -35,6 +35,17 @@ case "$board" in
 		[ "$PHYNBR" = "0" ] && macaddr_add $addr 1 > /sys${DEVPATH}/macaddress
 		[ "$PHYNBR" = "1" ] && macaddr_setbit_la $(macaddr_add $addr 2) > /sys${DEVPATH}/macaddress
 		;;
+	cmcc,rax3000m)
+		case "$(cmdline_get_var root)" in
+		/dev/mmc*)
+			addr=$(mmc_get_mac_binary factory 0xa)
+			;;
+		*)
+			addr=$(mtd_get_mac_binary factory 0xa)
+			;;
+		esac
+		[ "$PHYNBR" = "1" ] && echo "$addr" > /sys${DEVPATH}/macaddress
+		;;
 	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/filogic/base-files/lib/upgrade/platform.sh

@@ -81,6 +81,18 @@ platform_do_upgrade() {
 			;;
 		esac
 		;;
+	cmcc,rax3000m)
+		case "$(cmdline_get_var root)" in
+		/dev/mmc*)
+			CI_KERNPART="production"
+			emmc_do_upgrade "$1"
+			;;
+		*)
+			CI_KERNPART="fit"
+			nand_do_upgrade "$1"
+			;;
+		esac
+		;;
 	cudy,wr3000-v1)
 		default_do_upgrade "$1"
 		;;
@@ -130,7 +142,8 @@ platform_check_image() {
 	[ "$#" -gt 1 ] && return 1
 
 	case "$board" in
-	bananapi,bpi-r3)
+	bananapi,bpi-r3|\
+	cmcc,rax3000m)
 		[ "$magic" != "d00dfeed" ] && {
 			echo "Invalid image type."
 			return 1
@@ -148,7 +161,8 @@ platform_check_image() {
 
 platform_copy_config() {
 	case "$(board_name)" in
-	bananapi,bpi-r3)
+	bananapi,bpi-r3|\
+	cmcc,rax3000m)
 		case "$(cmdline_get_var root)" in
 		/dev/mmc*)
 			emmc_copy_config

target/linux/mediatek/image/filogic.mk

@@ -204,6 +204,39 @@ define Device/cetron_ct3003
 endef
 TARGET_DEVICES += cetron_ct3003
 
+define Device/cmcc_rax3000m
+  DEVICE_VENDOR := CMCC
+  DEVICE_MODEL := RAX3000M
+  DEVICE_DTS := mt7981b-cmcc-rax3000m
+  DEVICE_DTS_OVERLAY := mt7981b-cmcc-rax3000m-emmc mt7981b-cmcc-rax3000m-nand
+  DEVICE_DTS_DIR := ../dts
+  DEVICE_DTC_FLAGS := --pad 4096
+  DEVICE_DTS_LOADADDR := 0x43f00000
+  DEVICE_PACKAGES := kmod-mt7981-firmware mt7981-wo-firmware kmod-usb3 \
+	e2fsprogs f2fsck mkf2fs
+  KERNEL_LOADADDR := 0x44000000
+  KERNEL := kernel-bin | gzip
+  KERNEL_INITRAMFS := kernel-bin | lzma | \
+	fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb with-initrd | pad-to 64k
+  KERNEL_INITRAMFS_SUFFIX := -recovery.itb
+  KERNEL_IN_UBI := 1
+  UBOOTENV_IN_UBI := 1
+  IMAGES := sysupgrade.itb
+  IMAGE_SIZE := $$(shell expr 64 + $$(CONFIG_TARGET_ROOTFS_PARTSIZE))m
+  IMAGE/sysupgrade.itb := append-kernel | \
+	 fit gzip $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb external-static-with-rootfs | \
+	 pad-rootfs | append-metadata
+  ARTIFACTS := \
+	emmc-gpt.bin emmc-preloader.bin emmc-bl31-uboot.fip \
+	nand-preloader.bin nand-bl31-uboot.fip
+  ARTIFACT/emmc-gpt.bin := mt798x-gpt emmc
+  ARTIFACT/emmc-preloader.bin := mt7981-bl2 emmc-ddr4
+  ARTIFACT/emmc-bl31-uboot.fip := mt7981-bl31-uboot cmcc_rax3000m-emmc
+  ARTIFACT/nand-preloader.bin := mt7981-bl2 spim-nand-ddr4
+  ARTIFACT/nand-bl31-uboot.fip := mt7981-bl31-uboot cmcc_rax3000m-nand
+endef
+TARGET_DEVICES += cmcc_rax3000m
+
 define Device/cudy_wr3000-v1
   DEVICE_VENDOR := Cudy
   DEVICE_MODEL := WR3000