ramips: add support for ALFA Network AC1200RM

ALFA Network AC1200RM is an AC1200 router, with 5-port FE switch and
USB 2.0 port. Device is based on MediaTek MT7620A + MT7612EN.

Specification:

- MT7620A (580 MHz)
- 64 MB of RAM (DDR2)
- 16 MB of FLASH (SPI NOR)
- 5x 10/100 Mbps Ethernet with passive PoE output in WAN and LAN4
- 2T2R 2.4 GHz (MT7620A)
- 2T2R 5 GHz (MT7612EN)
- 1x USB 2.0
- 9x LED (8 driven by GPIO)
- 1x button (reset)
- DC jack for main power input (12-24 V)
- 2x UART, I2C, I2S and LED headers

Flash instruction (do it under U-Boot, using UART and TFTP server):

Select option "2: Load system code then write to Flash via TFTP" and
use "sysupgrade" image.

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

target/linux/ramips/base-files/etc/board.d/01_leds

@@ -56,6 +56,10 @@ air3gii)
 	set_wifi_led "$boardname:green:wlan"
 	set_usb_led "$boardname:green:mobile"
 	;;
+alfa-network,ac1200rm)
+	set_wifi_led "$boardname:green:wlan2g" "wlan1"
+	ucidef_set_led_default "wps" "wps" "$boardname:green:wps" "0"
+	;;
 all0256n-4M|\
 all0256n-8M)
 	ucidef_set_rssimon "wlan0" "200000" "1"

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

@@ -71,6 +71,7 @@ ramips_setup_interfaces()
 		;;
 	3g-6200n|\
 	ai-br100|\
+	alfa-network,ac1200rm|\
 	d240|\
 	db-wrt01|\
 	dir-300-b7|\

target/linux/ramips/base-files/etc/diag.sh

@@ -69,6 +69,13 @@ get_status_led() {
 	ht-tm02)
 		status_led="$boardname:blue:wlan"
 		;;
+	alfa-network,ac1200rm|\
+	awapn2403|\
+	dir-645|\
+	sk-wb8|\
+	wrh-300cr)
+		status_led="$boardname:green:wps"
+		;;
 	all0239-3g|\
 	dcs-930|\
 	dir-300-b1|\
@@ -102,12 +109,6 @@ get_status_led() {
 	ip2202)
 		status_led="$boardname:green:run"
 		;;
-	awapn2403|\
-	dir-645|\
-	sk-wb8|\
-	wrh-300cr)
-		status_led="$boardname:green:wps"
-		;;
 	c108)
 		status_led="$boardname:green:lan"
 		;;

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

@@ -16,6 +16,7 @@ platform_check_image() {
 	a5-v11|\
 	ai-br100|\
 	air3gii|\
+	alfa-network,ac1200rm|\
 	all0239-3g|\
 	all0256n-4M|\
 	all0256n-8M|\

target/linux/ramips/dts/AC1200RM.dts

@@ -0,0 +1,171 @@
+/*
+ *  BSD LICENSE
+ *
+ *  Copyright (C) 2018 Piotr Dymacz <pepe2k@gmail.com>
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *    2. Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *    3. Neither the names of the copyright holders nor the names of any
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *  HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/dts-v1/;
+
+#include "mt7620a.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "alfa-network,ac1200rm", "ralink,mt7620a-soc";
+	model = "ALFA Network AC1200RM";
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <20>;
+
+		reset {
+			label = "reset";
+			gpios = <&gpio2 15 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		wlan2g {
+			label = "ac1200rm:green:wlan2g";
+			gpios = <&gpio3 0 GPIO_ACTIVE_LOW>;
+		};
+
+		wps {
+			label = "ac1200rm:green:wps";
+			gpios = <&gpio1 14 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&ehci {
+	status = "okay";
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0x28>;
+	mediatek,portmap = "llllw";
+	pinctrl-names = "default";
+	pinctrl-0 = <&ephy_pins>;
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&gpio2 {
+	status = "okay";
+};
+
+&gpio3 {
+	status = "okay";
+};
+
+&gsw {
+	mediatek,port4 = "ephy";
+};
+
+&ohci {
+	status = "okay";
+};
+
+&pcie {
+	status = "okay";
+
+	pcie-bridge {
+		mt76@0,0 {
+			reg = <0x0000 0 0 0 0>;
+			device_type = "pci";
+			mediatek,mtd-eeprom = <&factory 0x8000>;
+			ieee80211-freq-limit = <5000000 6000000>;
+
+			led {
+				led-sources = <2>;
+				led-active-low;
+			};
+		};
+	};
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "nd_sd", "spi refclk", "wled";
+			ralink,function = "gpio";
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	m25p80@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+
+		partition@0 {
+			label = "u-boot";
+			reg = <0x0 0x30000>;
+			read-only;
+		};
+
+		partition@30000 {
+			label = "config";
+			reg = <0x30000 0x10000>;
+			read-only;
+		};
+
+		factory: partition@40000 {
+			label = "factory";
+			reg = <0x40000 0x10000>;
+			read-only;
+		};
+
+		partition@50000 {
+			label = "firmware";
+			reg = <0x50000 0xfb0000>;
+		};
+	};
+};
+
+&wmac {
+	ralink,mtd-eeprom = <&factory 0>;
+};

target/linux/ramips/image/mt7620.mk

@@ -27,6 +27,15 @@ define Device/ai-br100
 endef
 TARGET_DEVICES += ai-br100
 
+define Device/alfa-network_ac1200rm
+  DTS := AC1200RM
+  IMAGE_SIZE := 16064k
+  DEVICE_TITLE := ALFA Network AC1200RM
+  DEVICE_PACKAGES := kmod-usb2 kmod-usb-ohci
+  SUPPORTED_DEVICES := $(subst _,$(comma),$(1))
+endef
+TARGET_DEVICES += alfa-network_ac1200rm
+
 define Device/Archer
   TPLINK_HWREVADD := 0
   TPLINK_HVERSION := 3