ramips: add support for D-Link COVR-X1860 A1

The COVR-X1860 are MT7621-based AX1800 devices (similar to DAP-X1860, but
with two Ethernet ports and external power supply) that are sold in sets
of two (COVR-X1862) and three (COVR-X1863).

Specification:
 - MT7621
 - MT7915 + MT7975 2x2 802.11ax (DBDC)
 - 256MB RAM
 - 128 MB flash
 - 3 LEDs (red, orange, white), routed to one indicator in the top of the device
 - 2 buttons (WPS in the back and Reset at the bottom of the device)

MAC addresses:
 - LAN MAC (printed on the device) is stored in config2 partition as ASCII (entry factory_mac=xx:xx:xx:xx:xx:xx)
 - WAN MAC: LAN MAC + 3
 - 2.4G MAC: LAN MAC + 1
 - 5G MAC: LAN MAC + 2

The pins for the serial console are already labeled on the board (VCC, TX, RX, GND). Serial settings: 3.3V, 115200,8n1

Flashing via OEM Web Interface:
 - Download openwrt-ramips-mt7621-dlink_covr-x1860-a1-squashfs-factory.bin via the OEM web interface firmware update
 - The configuration wizard can be skipped by directly going to http://192.168.0.1/UpdateFirmware_Simple.html

Flashing via Recovery Web Interface:
 - Set your IP address to 192.168.0.10, subnetmask 255.255.255.0
 - Press the reset button while powering on the deivce
 - Keep the reset button pressed until the status LED blinks red
 - Open a Chromium based browser and goto http://192.168.0.1
 - Download openwrt-ramips-mt7621-dlink_covr-x1860-a1-squashfs-recovery.bin

Revert back to stock using the Recovery Web Interface:
 - Set your IP address to 192.168.0.10, subnetmask 255.255.255.25
 - Press the reset button while powering on the deivce
 - Keep the reset button pressed until the status LED blinks red
 - Open a Chromium based browser and goto http://192.168.0.1
 - Flash a decrypted firmware image from D-Link. Decrypting an firmware image is described below.

Decrypting a D-Link firmware image:
 - Download https://github.com/openwrt/firmware-utils/blob/master/src/dlink-sge-image.c and https://raw.githubusercontent.com/openwrt/firmware-utils/master/src/dlink-sge-image.h
 - Compile a binary from the downloaded file, e.g. gcc dlink-sge-image.c -lcrypto -o dlink-sge-image
 - Run ./dlink-sge-image COVR-X1860 <OriginalFirmware> <OutputFile> -d
 - Example for firmware 102b01: ./dlink-sge-image COVR-X1860 COVR-X1860_RevA_Firmware_102b01.bin COVR-X1860_RevA_Firmware_102b01_Decrypted.bin -d

The pull request is based on the discussion in https://forum.openwrt.org/t/add-support-for-d-link-covr-x1860

Signed-off-by: Sebastian Schaper <openwrt@sebastianschaper.net>
Signed-off-by: Roland Reinl <reinlroland+github@gmail.com>

1 files changed, 186 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/mt7621_dlink_covr-x1860-a1.dts b/target/linux/ramips/dts/mt7621_dlink_covr-x1860-a1.dts
new file mode 100644
index 00000000000..c06c5e36baa
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_dlink_covr-x1860-a1.dts
@@ -0,0 +1,186 @@
+// 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 = "dlink,covr-x1860-a1", "mediatek,mt7621-soc";
+	model = "D-Link COVR-X1860 A1";
+
+	aliases {
+		led-boot = &status_orange;
+		led-failsafe = &status_red;
+		led-running = &status_white;
+		led-upgrade = &status_red;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+		};
+
+		wps {
+			label = "wps";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&gpio 8 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		status_white: power {
+			label = "white:status";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+
+		status_orange: status_orange {
+			label = "orange:status";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+			default-state = "on";
+		};
+
+		status_red: status_red {
+			label = "red:status";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	virtual_flash {
+		compatible = "mtd-concat";
+
+		devices = <&fwconcat0 &fwconcat1>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "ubi";
+				reg = <0x0 0x0>;
+			};
+		};
+	};
+};
+
+&nand {
+	status = "okay";
+
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partition@0 {
+			label = "bootloader";
+			reg = <0x0 0x80000>;
+			read-only;
+		};
+
+		partition@80000 {
+			label = "config";
+			reg = <0x80000 0x80000>;
+			read-only;
+		};
+
+		factory: partition@100000 {
+			label = "factory";
+			reg = <0x100000 0x80000>;
+			read-only;
+		};
+
+		partition@180000 {
+			label = "config2";
+			reg = <0x180000 0x40000>;
+			read-only;
+		};
+
+		partition@1c0000 {
+			label = "kernel";
+			reg = <0x1c0000 0x800000>;
+		};
+
+		fwconcat0: partition@9c0000 {
+			label = "fwconcat0";
+			reg = <0x9c0000 0x2000000>;
+		};
+
+		partition@29c0000 {
+			label = "kernel2";
+			reg = <0x29c0000 0x800000>;
+			read-only;
+		};
+
+		fwconcat1: partition@31c0000 {
+			label = "fwconcat1";
+			reg = <0x31c0000 0x2a00000>;
+		};
+
+		partition@5bc0000 {
+			label = "private";
+			reg = <0x5bc0000 0x1400000>;
+			read-only;
+		};
+
+		partition@6fc0000 {
+			label = "mydlink";
+			reg = <0x6fc0000 0x600000>;
+			read-only;
+		};
+
+		partition@75c0000 {
+			label = "myconfig";
+			reg = <0x75c0000 0xa00000>;
+			read-only;
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x0>;
+		mediatek,disable-radar-background;
+	};
+};
+
+&gmac1 {
+	status = "okay";
+	phy-handle = <&ethphy4>;
+};
+
+&mdio {
+	ethphy4: ethernet-phy@4 {
+		reg = <4>;
+	};
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "internet";
+		};
+
+		port@2 {
+			status = "okay";
+			label = "ethernet";
+		};
+	};
+};