ath79: add support for COMFAST CF-E110N

This patch adds support for the COMFAST CF-E110N, an outdoor wireless
CPE with two Ethernet ports and a 802.11bgn radio.

Specifications:

 - 650/400/216 MHz (CPU/DDR/AHB)
 - 2x 10/100 Mbps Ethernet, both with PoE-in support
 - 64 MB of RAM (DDR2)
 - 16 MB of FLASH
 - 2T2R 2.4 GHz, up to 26 dBm
 - 11 dBi built-in antenna
 - POWER/LAN/WAN/WLAN green LEDs
 - 4x RSSI LEDs (2x red, 2x green)
 - UART (115200 8N1) and GPIO (J9) headers on PCB

Flashing instructions:

 The original firmware is based on OpenWrt so a sysupgrade image can be
 installed via the stock web GUI. Settings from the original firmware
 will be saved and restored on the new want, so a factory reset will be
 needed: once the new firmware is flashed, perform the factory reset by
 pushing the reset button several times during the boot process, while the
 WAN LED flashes, until it starts flashing quicker.

 The U-boot bootloader contains a recovery HTTP server to upload the
 firmware. Push the reset button while powering the device on and keep it
 pressed for >10 seconds. The recovery page will be at http://192.168.1.1

Notes:

 The device is advertised, sold and labeled as "CF-E110N", but the
 bootloader and the stock firmware identify it as "v2".

Acknowledgments:

 Petr Štetiar <ynezz@true.cz>
 Sebastian Kemper <sebastian_ml@gmx.net>
 Chuanhong Guo <gch981213@gmail.com>

Signed-off-by: Roger Pueyo Centelles <roger.pueyo@guifi.net>
[drop unused labels from devicetree source file]
Signed-off-by: Mathias Kresin <dev@kresin.me>

3 files changed, 175 insertions, 0 deletions

diff --git a/target/linux/ath79/base-files/etc/board.d/01_leds b/target/linux/ath79/base-files/etc/board.d/01_leds
index fa7fe7178f..6a4df57933 100755
--- a/target/linux/ath79/base-files/etc/board.d/01_leds
+++ b/target/linux/ath79/base-files/etc/board.d/01_leds
@@ -28,6 +28,15 @@ buffalo,whr-g301n)
 	ucidef_set_led_switch "lan3" "LAN3" "$boardname:green:lan3" "switch0" "0x08"
 	ucidef_set_led_switch "lan4" "LAN4" "$boardname:green:lan4" "switch0" "0x10"
 	;;
+comfast,cf-e110n-v2)
+	ucidef_set_led_netdev "lan" "LAN" "$boardname:green:lan" "eth0"
+	ucidef_set_led_switch "wan" "WAN" "$boardname:green:wan" "switch0" "0x02"
+	ucidef_set_led_wlan "wlan" "WLAN" "$boardname:green:wlan" "phy0tpt"
+	ucidef_set_rssimon "wlan0" "200000" "1"
+	ucidef_set_led_rssi "rssilow" "RSSILOW" "$boardname:red:rssilow" "wlan0" "1" "100"
+	ucidef_set_led_rssi "rssimediumlow" "RSSIMEDIUMLOW" "$boardname:red:rssimediumlow" "wlan0" "26" "100"
+	ucidef_set_led_rssi "rssimediumhigh" "RSSIMEDIUMHIGH" "$boardname:green:rssimediumhigh" "wlan0" "51" "100"
+	ucidef_set_led_rssi "rssihigh" "RSSIHIGH" "$boardname:green:rssihigh" "wlan0" "76" "100"
 dlink,dir-859-a1)
 	ucidef_set_led_switch "internet" "WAN" "$boardname:green:internet" "switch0" "0x20"
 	;;
diff --git a/target/linux/ath79/dts/qca9533_comfast_cf-e110n-v2.dts b/target/linux/ath79/dts/qca9533_comfast_cf-e110n-v2.dts
new file mode 100644
index 0000000000..4bada93452
--- /dev/null
+++ b/target/linux/ath79/dts/qca9533_comfast_cf-e110n-v2.dts
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "qca953x.dtsi"
+
+/ {
+	compatible = "comfast,cf-e110n-v2", "qca,qca9533";
+	model = "COMFAST CF-E110N v2";
+
+	aliases {
+		serial0 = &uart;
+		led-boot = &wan;
+		led-failsafe = &wan;
+		led-upgrade = &wan;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&jtag_disable_pins &led_rssilow_pin &led_rssimediumhigh_pin &led_rssihigh_pin>;
+
+		wan: wan {
+			label = "cf-e110n-v2:green:wan";
+			gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+		};
+
+		lan {
+			label = "cf-e110n-v2:green:lan";
+			gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
+		};
+
+		rssilow {
+			label = "cf-e110n-v2:red:rssilow";
+			gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+		};
+
+		rssimediumlow {
+			label = "cf-e110n-v2:red:rssimediumlow";
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+		};
+
+		rssimediumhigh {
+			label = "cf-e110n-v2:green:rssimediumhigh";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+		};
+
+		rssihigh {
+			label = "cf-e110n-v2:green:rssihigh";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	ath9k-leds {
+		compatible = "gpio-leds";
+
+		wlan {
+			label = "cf-e110n-v2:green:wlan";
+			gpios = <&gpio 0 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy0tpt";
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys-polled";
+		poll-interval = <20>;
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+};
+
+&pinmux {
+	led_rssilow_pin: pinmux_rssilow_pin {
+		pinctrl-single,bits = <0x8 0x0 0xff000000>;
+	};
+
+	led_rssimediumhigh_pin: pinmux_rssimediumhigh_pin {
+		pinctrl-single,bits = <0xc 0x0 0x00ff0000>;
+	};
+
+	led_rssihigh_pin: pinmux_rssihigh_pin {
+		pinctrl-single,bits = <0x10 0x0 0x000000ff>;
+	};
+};
+
+&spi {
+	status = "okay";
+	num-cs = <1>;
+
+	flash@0 {
+		compatible = "winbond,w25q128", "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 0x010000>;
+				read-only;
+			};
+
+			art: partition@10000 {
+				label = "art";
+				reg = <0x010000 0x010000>;
+				read-only;
+			};
+
+			partition@20000 {
+				compatible = "denx,uimage";
+				label = "firmware";
+				reg = <0x020000 0xfd0000>;
+			};
+
+			partition@ff0000 {
+				label = "nvram";
+				reg = <0xff0000 0x010000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&uart {
+	status = "okay";
+};
+
+&eth0 {
+	status = "okay";
+	mtd-mac-address = <&art 0x0>;
+	phy-handle = <&swphy4>;
+};
+
+&eth1 {
+	status = "okay";
+	mtd-mac-address = <&art 0x1002>;
+
+	gmac-config {
+		device = <&gmac>;
+	};
+};
+
+&wmac {
+	status = "okay";
+	mtd-cal-data = <&art 0x1000>;
+	mtd-mac-address = <&art 0x6>;
+};
diff --git a/target/linux/ath79/image/generic.mk b/target/linux/ath79/image/generic.mk
index aedd67d699..80a286fcb5 100644
--- a/target/linux/ath79/image/generic.mk
+++ b/target/linux/ath79/image/generic.mk
@@ -156,6 +156,14 @@ define Device/buffalo_wzr-hp-g450h
 endef
 TARGET_DEVICES += buffalo_wzr-hp-g450h
 
+define Device/comfast_cf-e110n-v2
+  ATH_SOC := qca9533
+  DEVICE_TITLE := COMFAST CF-E110N v2
+  DEVICE_PACKAGES := rssileds kmod-leds-gpio -swconfig -uboot-envtools
+  IMAGE_SIZE := 16192k
+endef
+TARGET_DEVICES += comfast_cf-e110n-v2
+
 define Device/devolo_dvl1200e
   ATH_SOC := qca9558
   DEVICE_TITLE := devolo WiFi pro 1200e