ramips: add support for D-Link DIR-867/DIR-882 A1

This patch adds support for D-Link DIR-867 A1 and D-Link DIR-882 A1. Given
the similarity of these devices, this patch also introduces a common DTS
shared between DIR-867 A1, DIR-878 A1 and DIR-882 A1.

Specifications:
* Board: AP-MTKH7-0002
* SoC: MediaTek MT7621AT
* RAM: 128 MB (DDR3)
* Flash: 16 MB (SPI NOR)
* WiFi: MediaTek MT7615N (x2)
* Switch: 1 WAN, 4 LAN (Gigabit)
* Ports: 1 USB 2.0, 1 USB 3.0
* Buttons: Reset, WiFi Toggle, WPS
* LEDs: Power (green/orange), Internet (green/orange), WiFi 2.4G (green),
        WiFi 5G (green), USB 2.0 (green), USB 3.0 (green)

Notes:
* WiFi 2.4G and WiFi 5G LEDs are wired directly to the wireless chips
* DIR-867 wireless chips are limited to 3x3 streams at hardware level
* USB ports and related LEDs available only on DIR-882

Serial port:
* Parameters: 57600, 8N1
* Location: J1 header (close to the Reset, WiFi and WPS buttons)
* Pinout: 1 - VCC
          2 - RXD
          3 - TXD
          4 - GND

Installation:
* D-Link Recovery GUI: power down the router, press and hold the reset
  button, then re-plug it. Keep the reset button pressed until the power
  LED starts flashing orange, manually assign a static IP address under
  the 192.168.0.xxx subnet (e.g. 192.168.0.2) and go to http://192.168.0.1

* Some modern browsers may have problems flashing via the Recovery GUI,
  if that occurs consider uploading the firmware through cURL:

    curl -v -i -F "firmware=@file.bin" 192.168.0.1

Signed-off-by: Mateus B. Cassiano <mbc07@live.com>
[move DEVICE_VARIANT to individual definitions]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

6 files changed, 275 insertions, 152 deletions

diff --git a/target/linux/ramips/dts/mt7621_dlink_dir-867-a1.dts b/target/linux/ramips/dts/mt7621_dlink_dir-867-a1.dts
new file mode 100644
index 0000000000..34ddbeaec3
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_dlink_dir-867-a1.dts
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "mt7621_dlink_dir-8xx-a1.dtsi"
+
+/ {
+	compatible = "dlink,dir-867-a1", "mediatek,mt7621-soc";
+	model = "D-Link DIR-867 A1";
+
+	aliases {
+		led-boot = &led_power_orange;
+		led-failsafe = &led_power_green;
+		led-running = &led_power_green;
+		led-upgrade = &led_net_orange;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power_orange: power_orange {
+			label = "dir-867-a1:orange:power";
+			gpios = <&gpio 8 GPIO_ACTIVE_LOW>;
+		};
+
+		led_power_green: power_green {
+			label = "dir-867-a1:green:power";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+
+		led_net_orange: net_orange {
+			label = "dir-867-a1:orange:net";
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+		};
+
+		net_green {
+			label = "dir-867-a1:green:net";
+			gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
diff --git a/target/linux/ramips/dts/mt7621_dlink_dir-878-a1.dts b/target/linux/ramips/dts/mt7621_dlink_dir-878-a1.dts
index 15c46cb5f7..e2f569f40f 100644
--- a/target/linux/ramips/dts/mt7621_dlink_dir-878-a1.dts
+++ b/target/linux/ramips/dts/mt7621_dlink_dir-878-a1.dts
@@ -1,10 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
 /dts-v1/;
 
-#include "mt7621.dtsi"
-
-#include <dt-bindings/gpio/gpio.h>
-#include <dt-bindings/input/input.h>
+#include "mt7621_dlink_dir-8xx-a1.dtsi"
 
 / {
 	compatible = "dlink,dir-878-a1", "mediatek,mt7621-soc";
@@ -15,11 +12,6 @@
 		led-failsafe = &led_power_green;
 		led-running = &led_power_green;
 		led-upgrade = &led_net_orange;
-		label-mac-device = &gmac0;
-	};
-
-	chosen {
-		bootargs = "console=ttyS0,57600";
 	};
 
 	leds {
@@ -45,137 +37,4 @@
 			gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
 		};
 	};
-
-	keys {
-		compatible = "gpio-keys";
-
-		reset {
-			label = "reset";
-			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
-			linux,code = <KEY_RESTART>;
-		};
-
-		wps {
-			label = "wps";
-			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
-			linux,code = <KEY_WPS_BUTTON>;
-		};
-
-		wifi {
-			label = "wifi";
-			gpios = <&gpio 7 GPIO_ACTIVE_LOW>;
-			linux,code = <KEY_RFKILL>;
-		};
-	};
-};
-
-&spi0 {
-	status = "okay";
-
-	flash@0 {
-		compatible = "jedec,spi-nor";
-		reg = <0>;
-		spi-max-frequency = <50000000>;
-
-		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 0x20000>;
-				read-only;
-			};
-
-			partition@60000 {
-				compatible = "sge,uimage";
-				label = "firmware";
-				reg = <0x60000 0xfa0000>;
-			};
-		};
-	};
-};
-
-&pcie {
-	status = "okay";
-};
-
-&pcie0 {
-	wifi@0,0 {
-		compatible = "mediatek,mt76";
-		reg = <0x0000 0 0 0 0>;
-		mediatek,mtd-eeprom = <&factory 0x0000>;
-		ieee80211-freq-limit = <2400000 2500000>;
-
-		led {
-			led-active-low;
-		};
-	};
-};
-
-&pcie1 {
-	wifi@0,0 {
-		compatible = "mediatek,mt76";
-		reg = <0x0000 0 0 0 0>;
-		mediatek,mtd-eeprom = <&factory 0x8000>;
-		ieee80211-freq-limit = <5000000 6000000>;
-
-		led {
-			led-active-low;
-		};
-	};
-};
-
-&gmac0 {
-	mtd-mac-address = <&factory 0xe000>;
-};
-
-&switch0 {
-	ports {
-		port@0 {
-			status = "okay";
-			label = "lan4";
-		};
-
-		port@1 {
-			status = "okay";
-			label = "lan3";
-		};
-
-		port@2 {
-			status = "okay";
-			label = "lan2";
-		};
-
-		port@3 {
-			status = "okay";
-			label = "lan1";
-		};
-
-		port@4 {
-			status = "okay";
-			label = "wan";
-			mtd-mac-address = <&factory 0xe006>;
-		};
-	};
-};
-
-&state_default {
-	gpio {
-		groups = "i2c", "uart3", "jtag", "wdt";
-		function = "gpio";
-	};
 };
diff --git a/target/linux/ramips/dts/mt7621_dlink_dir-882-a1.dts b/target/linux/ramips/dts/mt7621_dlink_dir-882-a1.dts
new file mode 100644
index 0000000000..11f70ecf3f
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_dlink_dir-882-a1.dts
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "mt7621_dlink_dir-8xx-a1.dtsi"
+
+/ {
+	compatible = "dlink,dir-882-a1", "mediatek,mt7621-soc";
+	model = "D-Link DIR-882 A1";
+
+	aliases {
+		led-boot = &led_power_orange;
+		led-failsafe = &led_power_green;
+		led-running = &led_power_green;
+		led-upgrade = &led_net_orange;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power_orange: power_orange {
+			label = "dir-882-a1:orange:power";
+			gpios = <&gpio 8 GPIO_ACTIVE_LOW>;
+		};
+
+		led_power_green: power_green {
+			label = "dir-882-a1:green:power";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+
+		led_net_orange: net_orange {
+			label = "dir-882-a1:orange:net";
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+		};
+
+		net_green {
+			label = "dir-882-a1:green:net";
+			gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+		};
+
+		usb2 {
+			label = "dir-882-a1:green:usb2";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+			trigger-sources = <&ehci_port2>;
+			linux,default-trigger = "usbport";
+		};
+
+		usb3 {
+			label = "dir-882-a1:green:usb3";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+			trigger-sources = <&xhci_ehci_port1>;
+			linux,default-trigger = "usbport";
+		};
+	};
+};
diff --git a/target/linux/ramips/dts/mt7621_dlink_dir-8xx-a1.dtsi b/target/linux/ramips/dts/mt7621_dlink_dir-8xx-a1.dtsi
new file mode 100644
index 0000000000..f2f0a4c56f
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_dlink_dir-8xx-a1.dtsi
@@ -0,0 +1,149 @@
+// 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>
+
+/ {
+	aliases {
+		label-mac-device = &gmac0;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,57600";
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+
+		wifi {
+			label = "wifi";
+			gpios = <&gpio 7 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RFKILL>;
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+
+		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 0x20000>;
+				read-only;
+			};
+
+			partition@60000 {
+				compatible = "sge,uimage";
+				label = "firmware";
+				reg = <0x60000 0xfa0000>;
+			};
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x0000>;
+		ieee80211-freq-limit = <2400000 2500000>;
+
+		led {
+			led-active-low;
+		};
+	};
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x8000>;
+		ieee80211-freq-limit = <5000000 6000000>;
+
+		led {
+			led-active-low;
+		};
+	};
+};
+
+&gmac0 {
+	mtd-mac-address = <&factory 0xe000>;
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "lan4";
+		};
+
+		port@1 {
+			status = "okay";
+			label = "lan3";
+		};
+
+		port@2 {
+			status = "okay";
+			label = "lan2";
+		};
+
+		port@3 {
+			status = "okay";
+			label = "lan1";
+		};
+
+		port@4 {
+			status = "okay";
+			label = "wan";
+			mtd-mac-address = <&factory 0xe006>;
+		};
+	};
+};
+
+&state_default {
+	gpio {
+		groups = "i2c", "uart3", "jtag", "wdt";
+		function = "gpio";
+	};
+};
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index e97d2315f1..0315822c0b 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -220,6 +220,18 @@ define Device/buffalo_wsr-600dhp
 endef
 TARGET_DEVICES += buffalo_wsr-600dhp
 
+define Device/dlink_dir-8xx-a1
+  IMAGE_SIZE := 16000k
+  DEVICE_VENDOR := D-Link
+  DEVICE_PACKAGES := kmod-mt7615e kmod-mt7615-firmware wpad-basic
+  KERNEL_INITRAMFS := $$(KERNEL) | uimage-padhdr 96
+  IMAGES += factory.bin
+  IMAGE/sysupgrade.bin := append-kernel | append-rootfs | uimage-padhdr 96 |\
+	pad-rootfs | append-metadata | check-size
+  IMAGE/factory.bin := append-kernel | append-rootfs | uimage-padhdr 96 |\
+	check-size
+endef
+
 define Device/dlink_dir-860l-b1
   $(Device/seama)
   BLOCKSIZE := 64k
@@ -236,21 +248,28 @@ define Device/dlink_dir-860l-b1
 endef
 TARGET_DEVICES += dlink_dir-860l-b1
 
+define Device/dlink_dir-867-a1
+  $(Device/dlink_dir-8xx-a1)
+  DEVICE_MODEL := DIR-867
+  DEVICE_VARIANT := A1
+endef
+TARGET_DEVICES += dlink_dir-867-a1
+
 define Device/dlink_dir-878-a1
-  IMAGE_SIZE := 16000k
-  DEVICE_VENDOR := D-Link
+  $(Device/dlink_dir-8xx-a1)
   DEVICE_MODEL := DIR-878
   DEVICE_VARIANT := A1
-  DEVICE_PACKAGES := kmod-mt7615e kmod-mt7615-firmware wpad-basic
-  KERNEL_INITRAMFS := $$(KERNEL) | uimage-padhdr 96
-  IMAGES += factory.bin
-  IMAGE/sysupgrade.bin := append-kernel | append-rootfs | uimage-padhdr 96 |\
-	pad-rootfs | append-metadata | check-size
-  IMAGE/factory.bin := append-kernel | append-rootfs | uimage-padhdr 96 |\
-	check-size
 endef
 TARGET_DEVICES += dlink_dir-878-a1
 
+define Device/dlink_dir-882-a1
+  $(Device/dlink_dir-8xx-a1)
+  DEVICE_MODEL := DIR-882
+  DEVICE_VARIANT := A1
+  DEVICE_PACKAGES += kmod-usb3 kmod-usb-ledtrig-usbport
+endef
+TARGET_DEVICES += dlink_dir-882-a1
+
 define Device/d-team_newifi-d2
   $(Device/uimage-lzma-loader)
   IMAGE_SIZE := 32448k
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds b/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
index a44b1a09d0..43cd77ccd1 100755
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
@@ -27,7 +27,9 @@ gehua,ghl-r-001)
 	ucidef_set_led_netdev "internet" "internet" "$boardname:blue:internet" "wan"
 	;;
 dlink,dir-860l-b1|\
-dlink,dir-878-a1)
+dlink,dir-867-a1|\
+dlink,dir-878-a1|\
+dlink,dir-882-a1)
 	ucidef_set_led_netdev "wan" "wan" "$boardname:green:net" "wan"
 	;;
 gnubee,gb-pc1|\