ramips: add support for TP-Link RE650 v1

TP-Link RE650 v1 is a dual-band AC2600 range extender,
based on MediaTek MT7621A and MT7615E. According to the
wikidevi entry for RE650 this device is identical with
TP-Link RE500 as hardware. This patch supports only RE650.

Hardware specification:

- SoC 880 MHz - MediaTek MT7621AT
- 128 MB of DDR3 RAM
- 16 MB - Winbond 25Q128FVSG
- 4T4R 2.4 GHz - MediaTek MT7615E
- 4T4R 5 GHz - MediaTek MT7615E
- 1x 1 Gbps Ethernet - MT7621AT integrated
- 7x LEDs (Power, 2G, 5G, WPS(x2), Lan(x2))
- 4x buttons (Reset, Power, WPS, LED)
- UART header (J1) - 2:GND, 3:RX, 4:TX
  Serial console @ 57600,8n1

Flash instructions:

Upload
openwrt-ramips-mt7621-tplink_re650-v1-squashfs-factory.bin
from the RE650 web interface.

TFTP recovery to stock firmware:

Unfortunately, I can't find an easy way to recover the RE
without opening the device and using modified binaries. The
TFTP upload will only work if selected from u-boot, which
means you have to open the device and attach to the serial
console. The TFTP update procedure does *not* accept the
published vendor firmware binaries. However, it allows to
flash kernel + rootfs binaries, and this works if you have
a backup of the original contents of the flash. It's probably
possible to create special image out of the vendor binaries
and use that as recovery image.

Signed-off-by: Georgi Vlaev <georgi.vlaev@gmail.com>
[re-added variables for kernel header]
Signed-off-by: David Bauer <mail@david-bauer.net>

1 files changed, 177 insertions, 0 deletions

diff --git a/target/linux/ramips/dts/mt7621_tplink_re650-v1.dts b/target/linux/ramips/dts/mt7621_tplink_re650-v1.dts
new file mode 100644
index 0000000000..5c1d308ed8
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_tplink_re650-v1.dts
@@ -0,0 +1,177 @@
+// 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>
+
+/ {
+	compatible = "tplink,re650-v1", "mediatek,mt7621-soc";
+	model = "TP-Link RE650 v1";
+
+	aliases {
+		led-boot = &led_power;
+		led-failsafe = &led_power;
+		led-running = &led_power;
+		led-upgrade = &led_power;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,57600";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power: power {
+			label = "re650-v1:blue:power";
+			gpios = <&gpio0 22 GPIO_ACTIVE_LOW>;
+		};
+
+		wifi2g {
+			label = "re650-v1:blue:wifi2G";
+			gpios = <&gpio0 23 GPIO_ACTIVE_LOW>;
+		};
+
+		wifi5g {
+			label = "re650-v1:blue:wifi5G";
+			gpios = <&gpio0 24 GPIO_ACTIVE_LOW>;
+		};
+
+		wps_red {
+			label = "re650-v1:red:wps";
+			gpios = <&gpio0 26 GPIO_ACTIVE_HIGH>;
+		};
+
+		wps_blue {
+			label = "re650-v1:blue:wps";
+			gpios = <&gpio0 27 GPIO_ACTIVE_HIGH>;
+		};
+
+		eth_act {
+			label = "re650-v1:green:eth_act";
+			gpios = <&gpio0 28 GPIO_ACTIVE_LOW>;
+		};
+
+		eth_link {
+			label = "re650-v1:green:eth_link";
+			gpios = <&gpio0 29 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		wps {
+			label = "wps";
+			gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+
+		power {
+			label = "power";
+			gpios = <&gpio0 25 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+			linux,code = <KEY_POWER>;
+		};
+
+		led {
+			label = "led";
+			gpios = <&gpio0 30 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+			linux,code = <KEY_LIGHTS_TOGGLE>;
+		};
+
+		reset {
+			label = "reset";
+			gpios = <&gpio0 31 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	w25q64@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <40000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x20000>;
+				read-only;
+			};
+
+			partition@20000 {
+				compatible = "tplink,firmware";
+				label = "firmware";
+				reg = <0x20000 0xde0000>;
+			};
+
+			config: partition@e00000 {
+				label = "config";
+				reg = <0xe00000 0x50000>;
+				read-only;
+			};
+
+			/* range 0xe50000 to 0xff0000 is empty in vendor
+			 * firmware, so we do not use it either
+			 */
+
+			radio: partition@ff0000 {
+				label = "radio";
+				reg = <0xff0000 0x10000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&radio 0>;
+		mtd-mac-address = <&config 0x10008>;
+		mtd-mac-address-increment = <1>;
+		ieee80211-freq-limit = <2400000 2500000>;
+	};
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&radio 0x8000>;
+		mtd-mac-address = <&config 0x10008>;
+		mtd-mac-address-increment = <2>;
+		ieee80211-freq-limit = <5000000 6000000>;
+	};
+};
+
+&ethernet {
+	mtd-mac-address = <&config 0x10008>;
+};
+
+&pinctrl {
+	state_default: pinctrl0 {
+		gpio {
+			ralink,group = "rgmii2", "wdt";
+			ralink,function = "gpio";
+		};
+	};
+};