7 files changed, 202 insertions, 0 deletions
diff --git a/target/linux/ramips/base-files/etc/board.d/01_leds b/target/linux/ramips/base-files/etc/board.d/01_leds
index a2d5c2e7de..ff5d156f2c 100644
--- a/target/linux/ramips/base-files/etc/board.d/01_leds
+++ b/target/linux/ramips/base-files/etc/board.d/01_leds
@@ -242,6 +242,10 @@ miniembplug)
 	set_wifi_led "$board:red:wlan"
 	set_usb_led "$board:green:mobile"
 	;;
+mir3g)
+	ucidef_set_led_netdev "eth" "Ethernet" "$board:red:wan" "eth0"
+	set_usb_led "$board:blue:usb"
+	;;
 miwifi-mini)
 	ucidef_set_led_default "power" "power" "$board:red:status" "1"
 	;;
diff --git a/target/linux/ramips/base-files/etc/board.d/02_network b/target/linux/ramips/base-files/etc/board.d/02_network
index 2f001134a2..df70a8b2ec 100755
--- a/target/linux/ramips/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/base-files/etc/board.d/02_network
@@ -122,6 +122,10 @@ ramips_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0:lan" "1:lan" "2:lan" "3:lan" "4:wan" "6@eth0"
 		;;
+	mir3g)
+		ucidef_add_switch "switch0" \
+			"1:wan" "2:lan:2" "3:lan:1" "6@eth0"
+		;;
 	psg1218b)
 		ucidef_add_switch "switch0" \
 			"0:lan:3" "1:lan:2" "2:lan:1" "3:wan" "6@eth0"
@@ -421,6 +425,9 @@ ramips_setup_macs()
 		lan_mac=$(mtd_get_mac_binary factory_info 13)
 		wan_mac=$(macaddr_add "$lan_mac" 1)
 		;;
+	mir3g)
+		lan_mac=$(mtd_get_mac_binary Factory e006)
+		;;
 	miwifi-mini)
 		wan_mac=$(cat /sys/class/net/eth0/address)
 		lan_mac=$(macaddr_setbit_la "$wan_mac")
diff --git a/target/linux/ramips/base-files/etc/diag.sh b/target/linux/ramips/base-files/etc/diag.sh
index 5278830eb7..960e189283 100644
--- a/target/linux/ramips/base-files/etc/diag.sh
+++ b/target/linux/ramips/base-files/etc/diag.sh
@@ -177,6 +177,9 @@ get_status_led() {
 	m4-8M)
 		status_led="m4:blue:status"
 		;;
+	mir3g)
+		status_led="$board:yellow:status"
+		;;
 	miwifi-mini|\
 	zte-q7)
 		status_led="$board:red:status"
diff --git a/target/linux/ramips/base-files/lib/ramips.sh b/target/linux/ramips/base-files/lib/ramips.sh
index a3f376e6ac..fe66a87c2e 100755
--- a/target/linux/ramips/base-files/lib/ramips.sh
+++ b/target/linux/ramips/base-files/lib/ramips.sh
@@ -286,6 +286,9 @@ ramips_board_detect() {
 	*"Mercury MAC1200R v2")
 		name="mac1200rv2"
 		;;
+	*"Mi Router 3G")
+		name="mir3g"
+		;;
 	*"MicroWRT")
 		name="microwrt"
 		;;
diff --git a/target/linux/ramips/base-files/lib/upgrade/platform.sh b/target/linux/ramips/base-files/lib/upgrade/platform.sh
index 8977381c86..3cb1d19a28 100755
--- a/target/linux/ramips/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ramips/base-files/lib/upgrade/platform.sh
@@ -251,6 +251,7 @@ platform_check_image() {
 		return 0
 		;;
 	hc5962|\
+	mir3g|\
 	r6220)
 		# these boards use metadata images
 		return 0
@@ -297,6 +298,7 @@ platform_do_upgrade() {
 
 	case "$board" in
 	hc5962|\
+	mir3g|\
 	r6220|\
 	ubnt-erx|\
 	ubnt-erx-sfp)
diff --git a/target/linux/ramips/dts/MIR3G.dts b/target/linux/ramips/dts/MIR3G.dts
new file mode 100644
index 0000000000..0cdb6d57f3
--- /dev/null
+++ b/target/linux/ramips/dts/MIR3G.dts
@@ -0,0 +1,163 @@
+/dts-v1/;
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "xiaomi,mir3g", "mediatek,mt7621-soc";
+	model = "Xiaomi Mi Router 3G";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x10000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8";
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		wan {
+			label = "mir3g:red:wan";
+			gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
+		};
+
+		usb {
+			label = "mir3g:blue:usb";
+			gpios = <&gpio0 8 GPIO_ACTIVE_LOW>;
+		};
+
+		status {
+			label = "mir3g:yellow:status";
+			gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <20>;
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 18 GPIO_ACTIVE_HIGH>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+};
+
+&nand {
+	status = "okay";
+
+	partition@0 {
+		label = "Bootloader";
+		reg = <0x0 0x80000>;
+		read-only;
+	};
+
+	partition@80000 {
+		label = "Config";
+		reg = <0x80000 0x40000>;
+		read-only;
+	};
+
+	partition@c0000 {
+		label = "Bdata";
+		reg = <0xc0000 0x40000>;
+		read-only;
+	};
+
+	factory: partition@100000 {
+		label = "Factory";
+		reg = <0x100000 0x40000>;
+		read-only;
+	};
+
+	partition@140000 {
+		label = "crash";
+		reg = <0x140000 0x40000>;
+		read-only;
+	};
+
+	partition@180000 {
+		label = "crash_syslog";
+		reg = <0x180000 0x40000>;
+		read-only;
+	};
+
+	partition@1c0000 {
+		label = "reserved0";
+		reg = <0x1c0000 0x40000>;
+		read-only;
+	};
+
+	/* 
+	 * kernel0 partition should be erased, so 
+	 * u-boot in failsafe routine switches 
+	 * to next one looking for kernel image.
+	 * To remind about this fact rename kernel0
+	 * into kernel_erase.
+	 */
+	partition@200000 {
+		label = "kernel_erase";
+		reg = <0x200000 0x400000>;
+	};
+
+	partition@600000 {
+		label = "kernel";
+		reg = <0x600000 0x400000>;
+	};
+
+	/* ubi partition is the result of squashing
+	 * next consequent 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@14c3,7603 {
+			compatible = "pci14c3,7603";
+			reg = <0x0000 0 0 0 0>;
+			mediatek,mtd-eeprom = <&factory 0x0000>;
+			ieee80211-freq-limit = <2400000 2500000>;
+		};
+	};	
+
+	pcie1 {
+		wifi@14c3,7662 {
+			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 = "lwlll";
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "jtag", "uart3", "wdt";
+			ralink,function = "gpio";
+		};
+	};
+};
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index a67facb83b..779616292d 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -105,6 +105,26 @@ define Device/k2p
 endef
 TARGET_DEVICES += k2p
 
+define Device/mir3g
+  DTS := MIR3G
+  BLOCKSIZE := 128k
+  PAGESIZE := 2048
+  KERNEL_SIZE := 4096k
+  KERNEL := $(KERNEL_DTB) | uImage lzma
+  IMAGE_SIZE := 32768k
+  UBINIZE_OPTS := -E 5
+  IMAGES := sysupgrade.tar kernel1.bin rootfs0.bin
+  IMAGE/kernel1.bin := append-kernel
+  IMAGE/rootfs0.bin := append-ubi | check-size $$$$(IMAGE_SIZE)
+  IMAGE/sysupgrade.tar := sysupgrade-tar | append-metadata
+  DEVICE_TITLE := Xiaomi Mi Router 3G
+  SUPPORTED_DEVICES += R3G
+  DEVICE_PACKAGES := \
+	kmod-mt7603 kmod-mt76x2 kmod-usb3 kmod-usb-ledtrig-usbport wpad-mini \
+	kmod-softdog
+endef
+TARGET_DEVICES += mir3g
+
 define Device/mt7621
   DTS := MT7621
   BLOCKSIZE := 64k