ramips: mt7621: add support for Xiaomi Mi Router 4

package/boot/uboot-envtools/files/ramips

@@ -36,6 +36,7 @@ zbtlink,zbt-wg2626)
 linksys,ea7500-v2|\
 xiaomi,mir3p|\
 xiaomi,mir3g|\
+xiaomi,mir4|\
 xiaomi,miwifi-r3|\
 xiaomi,mi-router-ac2100|\
 xiaomi,redmi-router-ac2100)

target/linux/ramips/dts/mt7621_xiaomi_mir4.dts

@@ -0,0 +1,173 @@
+/dts-v1/;
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "xiaomi,mir4", "mediatek,mt7621-soc";
+	model = "Xiaomi Mi Router 4";
+
+	aliases {
+		led-boot = &led_status_yellow;
+		led-failsafe = &led_status_red;
+		led-running = &led_status_blue;
+		led-upgrade = &led_status_yellow;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_status_red: status_red {
+			label = "mir4:red:status";
+			gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
+		};
+
+		led_status_blue: status_blue {
+			label = "mir4:blue:status";
+			gpios = <&gpio0 8 GPIO_ACTIVE_LOW>;
+		};
+
+		led_status_yellow: status_yellow {
+			label = "mir4:yellow:status";
+			gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+		minet {
+			label = "minet";
+			gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+
+};
+
+&nand {
+	status = "okay";
+
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partition@0 {
+			label = "Bootloader";
+			reg = <0x0 0x80000>;
+		};
+
+		partition@80000 {
+			label = "Config";
+			reg = <0x80000 0x40000>;
+		};
+
+		partition@c0000 {
+			label = "Bdata";
+			reg = <0xc0000 0x40000>;
+		};
+
+		factory: partition@100000 {
+			label = "factory";
+			reg = <0x100000 0x40000>;
+		};
+
+		partition@140000 {
+			label = "crash";
+			reg = <0x140000 0x40000>;
+		};
+
+		partition@180000 {
+			label = "crash_syslog";
+			reg = <0x180000 0x40000>;
+		};
+
+		partition@1c0000 {
+			label = "reserved0";
+			reg = <0x1c0000 0x40000>;
+		};
+
+		/* uboot expects to find kernels at 0x200000 & 0x600000
+		 * referred to as system 1 & system 2 respectively.
+		 * a kernel is considered suitable for handing control over
+		 * if its linux magic number exists & uImage CRC are correct.
+		 * If either of those conditions fail, a matching sys'n'_fail flag
+		 * is set in uboot env & a restart performed in the hope that the
+		 * alternate kernel is okay.
+		 * if neither kernel checksums ok and both are marked failed, system 2
+		 * is booted anyway.
+		 *
+		 * Note uboot's tftp flash install writes the transferred
+		 * image to both kernel partitions.
+		 */
+
+		partition@200000 {
+			label = "kernel_stock";
+			reg = <0x200000 0x400000>;
+		};
+
+		partition@600000 {
+			label = "kernel";
+			reg = <0x600000 0x400000>;
+		};
+
+		/* ubi partition is the result of squashing
+		 * next consecutive stock partitions:
+		 * - rootfs0 (rootfs partition for stock kernel0),
+		 * - rootfs1 (rootfs partition for stock failsafe kernel1),
+		 * - overlay (used as ubi overlay in stock fw)
+		 * resulting 117,5MiB space for packages.
+		 */
+
+		partition@a00000 {
+			label = "ubi";
+			reg = <0xa00000 0x7580000>;
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "pci14c3,7603";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x0000>;
+		ieee80211-freq-limit = <2400000 2500000>;
+	};
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "pci14c3,7662";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x8000>;
+		ieee80211-freq-limit = <5000000 6000000>;
+	};
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0xe000>;
+	mediatek,portmap = "llllw";
+};
+
+&state_default {
+	gpio {
+		ralink,group = "jtag", "uart2", "uart3", "wdt";
+		ralink,function = "gpio";
+	};
+};

target/linux/ramips/image/mt7621.mk

@@ -909,6 +909,22 @@ define Device/xiaomi_mir3p
 endef
 TARGET_DEVICES += xiaomi_mir3p
 
+define Device/xiaomi_mir4
+  BLOCKSIZE := 128k
+  PAGESIZE := 2048
+  KERNEL_SIZE := 4096k
+  IMAGE_SIZE := 124416k
+  UBINIZE_OPTS := -E 5
+  IMAGES += kernel1.bin rootfs0.bin
+  IMAGE/kernel1.bin := append-kernel
+  IMAGE/rootfs0.bin := append-ubi | check-size $$$$(IMAGE_SIZE)
+  IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
+  DEVICE_VENDOR := Xiaomi
+  DEVICE_MODEL := Mi Router 4
+  DEVICE_PACKAGES := kmod-mt7603 kmod-mt76x2 wpad-openssl uboot-envtools
+endef
+TARGET_DEVICES += xiaomi_mir4
+
 define Device/xiaomi_mi-router-ac2100
   BLOCKSIZE := 128k
   PAGESIZE := 2048

target/linux/ramips/mt7621/base-files/etc/board.d/02_network

@@ -155,6 +155,10 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"1:lan:3" "2:lan:2" "3:lan:1" "4:wan" "6@eth0"
 		;;
+	xiaomi,mir4)
+		ucidef_add_switch "switch0" \
+			"1:lan:2" "2:lan:1" "4:wan" "6t@eth0"
+		;;
 	xiaomi,mi-router-ac2100|\
 	xiaomi,redmi-router-ac2100)
 		ucidef_add_switch "switch0" \
@@ -296,7 +300,8 @@ ramips_setup_macs()
 		label_mac=$wan_mac
 		;;
 	xiaomi,mir3g|\
-	xiaomi,mir3p)
+	xiaomi,mir3p|\
+	xiaomi,mir4)
 		lan_mac=$(mtd_get_mac_binary factory 0xe006)
 		label_mac=$lan_mac
 		;;

target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh

@@ -55,6 +55,7 @@ platform_do_upgrade() {
 	netis,wf2881|\
 	xiaomi,mir3g|\
 	xiaomi,mir3p|\
+	xiaomi,mir4|\
 	xiaomi,mi-router-ac2100|\
 	xiaomi,redmi-router-ac2100)
 		nand_do_upgrade "$1"