ramips: add support for ASUS RP-AC87

Asus RP-AC87 ac2600 Repeater
2.4GHz 800Mbps
5GHz 1733Mbps

Hardware specifications:
SoC: MT7621A 2 cores 4 threads @880MHz
WiFi2G: MT7615E 2G 4x4 b/g/n
Wifi5G: MT7615E 5G 4x4 n/ac
DRAM: 128MB DDR3 @1200mhz
Flash: 16MB MX25L12805D SPI-NOR
LAN/WAN: MT7530 1x1000M

MAC addresses as verified by OEM firmware:
use address source
Lan/W5G *:B0 factory 0x8004 (label)
W2G *:B4 factory 0x0

Installation:

Asus windows recovery tool:

install the Asus firmware restoration utility
unplug the router, hold the reset button while powering it on
release when the power LED flashes slowly
specify a static IP on your computer:
IP address: 192.168.1.75
Subnet mask 255.255.255.0
Start the Asus firmware restoration utility, specify the factory image
and press upload
Do not power off the device after OpenWrt has booted until the LED flashing.
TFTP Recovery method:

set computer to a static ip, 192.168.1.2
connect computer to the LAN 1 port of the router
hold the reset button while powering on the router for a few seconds
send firmware image using a tftp client; i.e from linux:
$ tftp
tftp> binary
tftp> connect 192.168.1.1
tftp> put factory.bin
tftp> quit

Signed-off-by: Tamas Balogh <tamasbalogh@hotmail.com>

4 files changed, 200 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/mt7621_asus_rp-ac87.dts b/target/linux/ramips/dts/mt7621_asus_rp-ac87.dts
new file mode 100644
index 0000000000..98af875281
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_asus_rp-ac87.dts
@@ -0,0 +1,173 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "asus,rp-ac87", "mediatek,mt7621-soc";
+	model = "ASUS RP-AC87";
+
+	aliases {
+		led-boot = &led_wps;
+		led-failsafe = &led_wps;
+		led-running = &led_wps;
+		led-upgrade = &led_wps;
+		label-mac-device = &gmac0;
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_wps: wps {
+			label = "green:wps";
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+		};
+
+		rssilow-wlan0 {
+			label = "green:rssilow-wlan0";
+			gpios = <&gpio 42 GPIO_ACTIVE_LOW>;
+		};
+
+		rssimedlow-wlan0 {
+			label = "green:rssimedlow-wlan0";
+			gpios = <&gpio 43 GPIO_ACTIVE_LOW>;
+		};
+
+		rssimed-wlan0 {
+			label = "green:rssimed-wlan0";
+			gpios = <&gpio 41 GPIO_ACTIVE_LOW>;
+		};
+
+		rssihigh-wlan0 {
+			label = "green:rssihigh-wlan0";
+			gpios = <&gpio 44 GPIO_ACTIVE_LOW>;
+		};
+
+		rssilow-wlan1 {
+			label = "green:rssilow-wlan1";
+			gpios = <&gpio 45 GPIO_ACTIVE_LOW>;
+		};
+
+		rssimedlow-wlan1 {
+			label = "green:rssimedlow-wlan1";
+			gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
+		};
+
+		rssimed-wlan1 {
+			label = "green:rssimed-wlan1";
+			gpios = <&gpio 47 GPIO_ACTIVE_LOW>;
+		};
+
+		rssihigh-wlan1 {
+			label = "green:rssihigh-wlan1";
+			gpios = <&gpio 48 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+		m25p,fast-read;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x30000>;
+				read-only;
+			};
+
+			partition@30000 {
+				label = "u-boot-env";
+				reg = <0x30000 0x10000>;
+				read-only;
+			};
+
+			factory: partition@40000 {
+				label = "factory";
+				reg = <0x40000 0x10000>;
+				read-only;
+
+				compatible = "nvmem-cells";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				macaddr_factory_8004: macaddr@8004 {
+					reg = <0x8004 0x6>;
+				};
+			};
+
+			partition@50000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x50000 0xfb0000>;
+			};
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x0>;
+		ieee80211-freq-limit = <2400000 2500000>;
+	};
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x8000>;
+		ieee80211-freq-limit = <5000000 6000000>;
+	};
+};
+
+&gmac0 {
+	nvmem-cells = <&macaddr_factory_8004>;
+	nvmem-cell-names = "mac-address";
+};
+
+&switch0 {
+	ports {
+		port@4 {
+			status = "okay";
+			label = "lan";
+		};
+	};
+};
+
+&xhci {
+	status = "disabled";
+};
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index b2b6f6b4cd..aa7adeee60 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -175,6 +175,20 @@ define Device/asiarf_ap7621-nv1
 endef
 TARGET_DEVICES += asiarf_ap7621-nv1
 
+define Device/asus_rp-ac87
+  $(Device/dsa-migration)
+  $(Device/uimage-lzma-loader)
+  IMAGE_SIZE := 16064k
+  DEVICE_VENDOR := ASUS
+  DEVICE_MODEL := RP-AC87
+  IMAGES += factory.bin
+  IMAGE/factory.bin := append-kernel | append-rootfs | pad-rootfs | check-size
+  IMAGE/sysupgrade.bin := append-kernel | append-rootfs | pad-rootfs | \
+	check-size | append-metadata
+  DEVICE_PACKAGES := kmod-mt7615e kmod-mt7615-firmware rssileds
+endef
+TARGET_DEVICES += asus_rp-ac87
+
 define Device/asus_rt-ac57u
   $(Device/dsa-migration)
   DEVICE_VENDOR := ASUS
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds b/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
index 2cb8fdb557..37207a52d3 100644
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
@@ -7,6 +7,18 @@ board=$(board_name)
 board_config_update
 
 case $board in
+asus,rp-ac87)
+	ucidef_set_rssimon "wlan0" "200000" "1"
+	ucidef_set_rssimon "wlan1" "200000" "1"
+	ucidef_set_led_rssi "rssilow-wlan0" "RSSILOW" "green:rssilow-wlan0" "wlan0" "1" "100"
+	ucidef_set_led_rssi "rssimedlow-wlan0" "RSSIMEDLOW" "green:rssimedlow-wlan0" "wlan0" "20" "100"
+	ucidef_set_led_rssi "rssimed-wlan0" "RSSIMED" "green:rssimed-wlan0" "wlan0" "40" "100"
+	ucidef_set_led_rssi "rssihigh-wlan0" "RSSIHIGH" "green:rssihigh-wlan0" "wlan0" "70" "100"
+	ucidef_set_led_rssi "rssilow-wlan1" "RSSILOW" "green:rssilow-wlan1" "wlan1" "1" "100"
+	ucidef_set_led_rssi "rssimedlow-wlan1" "RSSIMEDLOW" "green:rssimedlow-wlan1" "wlan1" "20" "100"
+	ucidef_set_led_rssi "rssimed-wlan1" "RSSIMED" "green:rssimed-wlan1" "wlan1" "40" "100"
+	ucidef_set_led_rssi "rssihigh-wlan1" "RSSIHIGH" "green:rssihigh-wlan1" "wlan1" "70" "100"
+	;;
 asus,rt-n56u-b1)
 	ucidef_set_led_netdev "lan" "LAN link" "blue:lan" "br-lan"
 	ucidef_set_led_netdev "wan" "WAN link" "blue:wan" "wan"
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
index 0a139e0113..29336bad68 100644
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
@@ -9,6 +9,7 @@ ramips_setup_interfaces()
 
 	case $board in
 	ampedwireless,ally-00x19k|\
+	asus,rp-ac87|\
 	edimax,re23s|\
 	mikrotik,routerboard-m11g|\
 	netgear,ex6150|\