ath79: Add support for Ubiquity Bullet M (XW)

CPU: AR9342 SoC
RAM:     64 MB DDR2
Flash:    8 MB NOR SPI
Ports:  100 MBit (24V PoE in)
WLAN: 2.4/5 GHz
UART:     1 UART on PCB marked as J1 with 115200 8N1 config
LEDs:       Power, Ethernet, 4x RSSI LEDs (orange, red, 2x green)
Buttons:    Reset

UART connection details

  .---------------------------------.
  |                                 |
[ETH]          J1                 [ANT]
  |    o VCC o RX o TX o GND        |
  `---------------------------------'

Flashing instructions

 A) Serial console, U-Boot and TFTP

   1. Connect to serial header J1 on the PCB
   2. Power on device and enter U-Boot console
   3. Set up TFTP server serving an OpenWrt initramfs build
   4. Load initramfs build using the command tftpboot in the U-Boot cli
   5. Boot the loaded image using the command bootm
   6. Copy squashfs OpenWrt sysupgrade build to the booted device
   7. Use mtd to write sysupgrade to partition "firmware"
   8. Reboot and enjoy

 B) Experimental factory image flashing over SSH from airOS v6.1.7

   1. You need to flash your UBNT M2HP with airOS v6.1.7 firmware
      no other airOS version is currently supported
   2. git clone https://github.com/true-systems/ubnt-bullet-m2hp-openwrt-flashing
   3. cd ubnt-bullet-m2hp-openwrt-flashing
   4. make flash-factory FW_OWRT=/path/to/your/openwrt-ath79-generic-ubnt_bullet-m-xw-squashfs-factory.bin

Tested only on Bullet M2HP.

Signed-off-by: Petr Štetiar <ynezz@true.cz>

target/linux/ath79/base-files/etc/board.d/01_leds

@@ -94,6 +94,7 @@ tplink,tl-wr841-v11)
 	ucidef_set_led_switch "lan4" "LAN4" "tp-link:green:lan4" "switch0" "0x02"
 	;;
 ubnt,bullet-m|\
+ubnt,bullet-m-xw|\
 ubnt,nano-m|\
 ubnt,rocket-m)
 	ucidef_set_rssimon "wlan0" "200000" "1"

target/linux/ath79/base-files/etc/board.d/02_network

@@ -22,6 +22,7 @@ ath79_setup_interfaces()
 	tplink,tl-wa901nd-v2|\
 	tplink,tl-wr703n|\
 	ubnt,bullet-m|\
+	ubnt,bullet-m-xw|\
 	ubnt,lap-120|\
 	ubnt,nanostation-ac-loco|\
 	ubnt,rocket-m|\

target/linux/ath79/dts/ar9342_ubnt_bullet-m-xw.dts

@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "ar9342_ubnt_xw.dtsi"
+
+/ {
+	compatible = "ubnt,bullet-m-xw", "ubnt,xw";
+	model = "Ubiquiti Bullet M (XW)";
+};
+
+&mdio0 {
+	status = "okay";
+
+	phy-mask = <4>;
+	phy4: ethernet-phy@4 {
+		phy-mode = "rgmii";
+		reg = <4>;
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	pll-data = <0x06000000 0x00000101 0x00001313>;
+	mtd-mac-address = <&eeprom 0x0>;
+
+	phy-mode = "rgmii";
+	phy-handle = <&phy4>;
+
+	gmac-config {
+		device = <&gmac>;
+		rxd-delay = <3>;
+		rxdv-delay = <3>;
+	};
+};
+
+&eth1 {
+	status = "disabled";
+};

target/linux/ath79/dts/ar9342_ubnt_xw.dtsi

@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "ar9344.dtsi"
+
+/ {
+	compatible = "ubnt,xw", "qca,ar9342";
+	model = "Ubiquiti Networks XW board";
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		link1 {
+			label = "ubnt:red:link1";
+			gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+		};
+
+		link2 {
+			label = "ubnt:orange:link2";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+
+		link3 {
+			label = "ubnt:green:link3";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+		};
+
+		link4 {
+			label = "ubnt:green:link4";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "Reset button";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+};
+
+&ref {
+	clock-frequency = <40000000>;
+};
+
+&uart {
+	status = "okay";
+};
+
+&gpio {
+	status = "okay";
+};
+
+&spi {
+	status = "okay";
+	num-cs = <1>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <25000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x000000 0x040000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "u-boot-env";
+				reg = <0x040000 0x010000>;
+				read-only;
+			};
+
+			partition@50000 {
+				label = "firmware";
+				reg = <0x050000 0x760000>;
+			};
+
+			partition@fb0000 {
+				label = "cfg";
+				reg = <0x7b0000 0x040000>;
+				read-only;
+			};
+
+			eeprom: partition@ff0000 {
+				label = "EEPROM";
+				reg = <0x7f0000 0x010000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&wmac {
+	status = "okay";
+
+	mtd-cal-data = <&eeprom 0x1000>;
+	mtd-mac-address = <&eeprom 0x1002>;
+};

target/linux/ath79/image/generic-ubnt.mk

@@ -63,6 +63,15 @@ define Device/ubnt-wa
   ATH_SOC := ar9342
 endef
 
+define Device/ubnt-xw
+  $(Device/ubnt)
+  UBNT_TYPE := XW
+  UBNT_CHIP := ar934x
+  UBNT_BOARD := XM
+  UBNT_VERSION := 6.0.4
+  ATH_SOC := ar9342
+endef
+
 define Device/ubnt_bullet-m
   $(Device/ubnt-xm)
   DEVICE_TITLE := Ubiquiti Bullet-M
@@ -70,6 +79,13 @@ define Device/ubnt_bullet-m
 endef
 TARGET_DEVICES += ubnt_bullet-m
 
+define Device/ubnt_bullet-m-xw
+  $(Device/ubnt-xw)
+  DEVICE_TITLE := Ubiquiti Bullet-M (XW)
+  SUPPORTED_DEVICES += bullet-m-xw
+endef
+TARGET_DEVICES += ubnt_bullet-m-xw
+
 define Device/ubnt_rocket-m
   $(Device/ubnt-xm)
   DEVICE_TITLE := Ubiquiti Rocket-M