ramips: add support for ALFA Network AWUSFREE1

ALFA Network AWUSFREE1 is an USB Wi-Fi N300 adapter based on MT7628.

Specification:

- MT7628AN (580 MHz)
- 64 MB of RAM (DDR2)
- 8 MB of FLASH (SPI NOR)
- 2T2R 2.4 GHz (MT7628) with external FEM (RFFM4203)
- 2x detachable antennas (RP-SMA)
- ASIX AX88772 USB to Ethernet bridge (connected with MT7628 PHY0)
- 4x LED (2 driven by GPIO)
- 1x button (reset)
- 1x mini USB for host and main power input
- UART header on PCB

Flash instruction:

You can use sysupgrade image directly in vendor firmware which is based
on LEDE/OpenWrt. Alternatively, you can use web recovery mode in U-Boot:

1. Power device with reset button pressed and release it after ~5 sec.
2. Setup static IP 192.168.1.2/4 on your PC.
3. Go to 192.168.1.1 in browser and upload "sysupgrade" image.

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

1 files changed, 164 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/AWUSFREE1.dts b/target/linux/ramips/dts/AWUSFREE1.dts
new file mode 100644
index 0000000000..c0ffbb279a
--- /dev/null
+++ b/target/linux/ramips/dts/AWUSFREE1.dts
@@ -0,0 +1,164 @@
+/*
+ *  BSD LICENSE
+ *
+ *  Copyright (C) 2018 Piotr Dymacz <pepe2k@gmail.com>
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *    2. Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *    3. Neither the names of the copyright holders nor the names of any
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *  HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/dts-v1/;
+
+#include "mt7628an.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "alfa-network,awusfree1", "mediatek,mt7628an-soc";
+	model = "ALFA Network AWUSFREE1";
+
+	chosen {
+		bootargs = "console=ttyS0,115200";
+	};
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <20>;
+
+		reset {
+			label = "reset";
+			gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		system {
+			label = "awusfree1:orange:system";
+			gpios = <&gpio1 11 GPIO_ACTIVE_LOW>;
+		};
+
+		wlan {
+			label = "awusfree1:blue:wlan";
+			gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x4000000>;
+	};
+};
+
+&ehci {
+	status = "disabled";
+};
+
+&esw {
+	mediatek,portdisable = <0x1e>;
+};
+
+&ethernet {
+	mtd-mac-address = <&factory 0x2e>;
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&ohci {
+	status = "disabled";
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "p0led_an", "wdt", "wled_an";
+			ralink,function = "gpio";
+		};
+
+		ext_lna {
+			ralink,group = "uart1";
+			ralink,function = "sw_r";
+		};
+
+		ext_pa {
+			ralink,group = "i2s";
+			ralink,function = "antenna";
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	m25p80@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+		m25p,chunked-io = <32>;
+
+		partition@0 {
+			label = "u-boot";
+			reg = <0x0 0x30000>;
+			read-only;
+		};
+
+		partition@30000 {
+			label = "u-boot-env";
+			reg = <0x30000 0x1000>;
+		};
+
+		partition@031000 {
+			label = "config";
+			reg = <0x31000 0xf000>;
+			read-only;
+		};
+
+		factory: partition@40000 {
+			label = "factory";
+			reg = <0x40000 0x10000>;
+			read-only;
+		};
+
+		partition@50000 {
+			label = "firmware";
+			reg = <0x50000 0x7b0000>;
+		};
+	};
+};
+
+&wmac {
+	status = "okay";
+	mediatek,mtd-eeprom = <&factory 0x0>;
+};