ramips: add support for D-Link DIR-1960 A1

This patch adds support for D-Link DIR-1960 A1. Given the similarity with
the DIR-1760/2660 A1, this patch also introduces a common DTSI which can
be shared with these devices, with support to be added in future commits.

Specifications:
* Board: AP-MTKH7-0002
* SoC: MediaTek MT7621AT
* RAM: 256 MB (DDR3)
* Flash: 128 MB (NAND)
* WiFi: MediaTek MT7615N (x2)
* Switch: 1 WAN, 4 LAN (Gigabit)
* Ports: 1 USB 3.0
* Buttons: Reset, WPS
* LEDs: Power (white/orange), Internet (white/orange), WiFi 2.4G (white),
        WiFi 5G (white), USB 3.0 (white)

Notes:
* WiFi 2.4G and WiFi 5G LEDs are wired directly to the wireless chips

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

MAC addresses:

lan   factory 0xe000     *:EB (label)
wan   factory 0xe006     *:EE
2.4   factory 0xe000 +1  *:EC
5.0   factory 0xe000 +2  *:ED

Seems like vendor didn't replace the dummy entrys in the calibration data.

Signed-off-by: Josh Bendavid <joshbendavid@gmail.com>
[fix whitespace issues, create patch to merge DIR-1960 first, move
special WiFi MAC settings to DTS, extend commit message]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

2 files changed, 220 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/mt7621_dlink_dir-1960-a1.dts b/target/linux/ramips/dts/mt7621_dlink_dir-1960-a1.dts
new file mode 100644
index 0000000000..ed8b188994
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_dlink_dir-1960-a1.dts
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "mt7621_dlink_dir-xx60-a1.dtsi"
+
+/ {
+	compatible = "dlink,dir-1960-a1", "mediatek,mt7621-soc";
+	model = "D-Link DIR-1960 A1";
+
+	aliases {
+		led-boot = &led_power_orange;
+		led-failsafe = &led_power_white;
+		led-running = &led_power_white;
+		led-upgrade = &led_net_orange;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power_orange: power_orange {
+			label = "dir-1960-a1:orange:power";
+			gpios = <&gpio 8 GPIO_ACTIVE_LOW>;
+		};
+
+		led_power_white: power_white {
+			label = "dir-1960-a1:white:power";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+
+		led_net_orange: net_orange {
+			label = "dir-1960-a1:orange:net";
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+		};
+
+		net_white {
+			label = "dir-1960-a1:white:net";
+			gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+		};
+
+		usb_white {
+			label = "dir-1960-a1:white:usb";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+			trigger-sources = <&xhci_ehci_port1>;
+			linux,default-trigger = "usbport";
+		};
+	};
+};
+
+&wifi0 {
+	mtd-mac-address = <&factory 0xe000>;
+	mtd-mac-address-increment = <1>;
+};
+
+&wifi1 {
+	mtd-mac-address = <&factory 0xe000>;
+	mtd-mac-address-increment = <2>;
+};
diff --git a/target/linux/ramips/dts/mt7621_dlink_dir-xx60-a1.dtsi b/target/linux/ramips/dts/mt7621_dlink_dir-xx60-a1.dtsi
new file mode 100644
index 0000000000..e194592b57
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_dlink_dir-xx60-a1.dtsi
@@ -0,0 +1,163 @@
+// 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;
+	};
+
+	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>;
+		};
+	};
+};
+
+&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 0x40000>;
+			read-only;
+		};
+
+		partition@140000 {
+			label = "config2";
+			reg = <0x140000 0x40000>;
+			read-only;
+		};
+
+		partition@180000 {
+			label = "firmware";
+			compatible = "sge,uimage";
+			reg = <0x180000 0x2800000>;
+		};
+
+		partition@2980000 {
+			label = "private";
+			reg = <0x2980000 0x2000000>;
+			read-only;
+		};
+
+		partition@4980000 {
+			label = "firmware2";
+			compatible = "sge,uimage";
+			reg = <0x4980000 0x2800000>;
+		};
+
+		partition@7180000 {
+			label = "mydlink";
+			reg = <0x7180000 0x600000>;
+			read-only;
+		};
+
+		partition@7780000 {
+			label = "reserved";
+			reg = <0x7780000 0x880000>;
+			read-only;
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi0: 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 {
+	wifi1: 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";
+	};
+};