ath79: add support for ASUS RT-AC59U / ZenWiFi CD6

ASUS RT-AC59U / RT-AC59U v2 are wi-fi routers with a large number of
alternate names, including RT-AC1200GE, RT-AC1300G PLUS, RT-AC1500UHP,
RT-AC57U v2/v3, RT-AC58U v2/v3, and RT-ACRH12.

ASUS ZenWiFi AC Mini(CD6) is a mesh wifi system. The unit labeled CD6R
is the router, and CD6N is the node.

Hardware:

- SoC: QCN5502
- RAM: 128 MiB
- UART: 115200 baud (labeled on boards)
- Wireless:
  - 2.4GHz: QCN5502 on-chip 4x4 802.11b/g/n
    currently unsupported due to missing support for QCN550x in ath9k
  - 5GHz: QCA9888 pcie 5GHz 2x2 802.11a/n/ac
- Flash: SPI NOR
  - RT-AC59U / CD6N: 16 MiB
  - RT-AC59U v2 / CD6R: 32 MiB
- Ethernet: gigabit
  - RT-AC59U / RT-AC59U v2: 4x LAN 1x WAN
  - CD6R: 3x LAN 1x WAN
  - CD6N: 2x LAN
- USB:
  - RT-AC59U / RT-AC59U v2: 1 port USB 2.0
  - CD6R / CD6N: none

WiFi calibration data contains valid MAC addresses.

The initramfs image is uncompressed because I was unable to boot a
compressed initramfs from memory (gzip or lzma). Booting a compressed
image from flash works fine.

Installation:

To install without opening the case:

- Set your computer IP address to 192.168.1.10/24
- Power up with the Reset button pressed
- Release the Reset button after about 5 seconds or until you see the
  power LED blinking slowly
- Upload OpenWRT factory image via TFTP client to 192.168.1.1

Revert to stock firmware using the same TFTP method.

Signed-off-by: Wenli Looi <wlooi@ucalgary.ca>

package/boot/uboot-envtools/files/ath79

@@ -25,6 +25,10 @@ araknis,an-300-ap-i-n|\
 araknis,an-500-ap-i-ac|\
 araknis,an-700-ap-i-ac|\
 arduino,yun|\
+asus,rt-ac59u|\
+asus,rt-ac59u-v2|\
+asus,zenwifi-cd6n|\
+asus,zenwifi-cd6r|\
 buffalo,bhr-4grv2|\
 devolo,magic-2-wifi|\
 dlink,dir-859-a1|\

target/linux/ath79/dts/qcn5502_asus.dtsi

@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca956x.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	aliases {
+		label-mac-device = &eth0;
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	pll-data = <0x03000101 0x00000101 0x00001919>;
+
+	phy-mode = "sgmii";
+	phy-handle = <&phy0>;
+
+	nvmem-cells = <&macaddr_factory_1002>;
+	nvmem-cell-names = "mac-address";
+};
+
+&mdio0 {
+	status = "okay";
+
+	phy0: ethernet-phy@0 {
+		reg = <0>;
+		phy-mode = "sgmii";
+		qca,mib-poll-interval = <500>;
+
+		qca,ar8327-initvals = <
+			0x04 0x80080080 /* PORT0 PAD MODE CTRL */
+			0x08 0x00000000 /* PORT5 PAD MODE CTRL */
+			0x0c 0x00000000 /* PORT6 PAD MODE CTRL */
+			0x10 0x00000080 /* POWER_ON_STRAP */
+			0x7c 0x0000007e /* PORT0_STATUS */
+			0x94 0x00000200 /* PORT6_STATUS */
+			>;
+	};
+};
+
+&pcie {
+	status = "okay";
+
+	wifi@0,0 {
+		compatible = "qcom,ath10k";
+		reg = <0 0 0 0 0>;
+
+		nvmem-cells = <&precal_factory_5000>;
+		nvmem-cell-names = "pre-calibration";
+	};
+};
+
+&spi {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <25000000>;
+		m25p,fast-read;
+
+		mtdparts: partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "Bootloader";
+				reg = <0x000000 0x040000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "nvram";
+				reg = <0x040000 0x010000>;
+				read-only;
+			};
+
+			partition@50000 {
+				label = "Factory";
+				reg = <0x050000 0x010000>;
+				read-only;
+
+				compatible = "nvmem-cells";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				cal_factory_1000: cal@1000 {
+					reg = <0x1000 0x440>;
+				};
+
+				macaddr_factory_1002: macaddr@1002 {
+					reg = <0x1002 0x6>;
+				};
+
+				precal_factory_5000: precal@5000 {
+					reg = <0x5000 0x2f20>;
+				};
+			};
+		};
+	};
+};
+
+&wmac {
+	/* Does not work due to lack of QCN5502 support in ath9k. */
+	status = "disabled";
+
+	nvmem-cells = <&cal_factory_1000>;
+	nvmem-cell-names = "calibration";
+};

target/linux/ath79/dts/qcn5502_asus_rt-ac59u-v2.dts

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qcn5502_asus_rt-ac59u.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "asus,rt-ac59u-v2", "qca,qcn5500", "qca,qca9560";
+	model = "ASUS RT-AC59U v2";
+};
+
+&mtdparts {
+	partition@60000 {
+		label = "firmware";
+		reg = <0x060000 0x1fa0000>;
+		compatible = "denx,uimage";
+	};
+};

target/linux/ath79/dts/qcn5502_asus_rt-ac59u.dts

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qcn5502_asus_rt-ac59u.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "asus,rt-ac59u", "qca,qcn5500", "qca,qca9560";
+	model = "ASUS RT-AC59U";
+};
+
+&mtdparts {
+	partition@60000 {
+		label = "firmware";
+		reg = <0x060000 0xfa0000>;
+		compatible = "denx,uimage";
+	};
+};

target/linux/ath79/dts/qcn5502_asus_rt-ac59u.dtsi

@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qcn5502_asus.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	aliases {
+		led-boot = &led_power;
+		led-failsafe = &led_power;
+		led-running = &led_power;
+		led-upgrade = &led_power;
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+
+		wps {
+			label = "wps";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power: power {
+			label = "blue:power";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+
+		usb {
+			label = "blue:usb";
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+			trigger-sources = <&hub_port0>;
+			linux,default-trigger = "usbport";
+		};
+
+		wlan2g {
+			label = "blue:wlan2g";
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy1tpt";
+		};
+
+		wlan5g {
+			label = "blue:wlan5g";
+			gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy0tpt";
+		};
+	};
+};
+
+&usb_phy0 {
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+};

target/linux/ath79/dts/qcn5502_asus_zenwifi-cd6.dtsi

@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qcn5502_asus.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	aliases {
+		led-boot = &led_blue;
+		led-failsafe = &led_red;
+		led-running = &led_blue;
+		led-upgrade = &led_red;
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+
+		wps {
+			label = "wps";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_blue: blue {
+			label = "blue";
+			gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
+		};
+
+		green {
+			label = "green";
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+		};
+
+		led_red: red {
+			label = "red";
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+		};
+
+		white {
+			label = "white";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+	};
+};

target/linux/ath79/dts/qcn5502_asus_zenwifi-cd6n.dts

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qcn5502_asus_zenwifi-cd6.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "asus,zenwifi-cd6n", "qca,qcn5500", "qca,qca9560";
+	model = "ASUS ZenWiFi CD6N";
+};
+
+&mtdparts {
+	partition@60000 {
+		label = "firmware";
+		reg = <0x060000 0xfa0000>;
+		compatible = "denx,uimage";
+	};
+};

target/linux/ath79/dts/qcn5502_asus_zenwifi-cd6r.dts

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qcn5502_asus_zenwifi-cd6.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "asus,zenwifi-cd6r", "qca,qcn5500", "qca,qca9560";
+	model = "ASUS ZenWiFi CD6R";
+};
+
+&mtdparts {
+	partition@60000 {
+		label = "firmware";
+		reg = <0x060000 0x1fa0000>;
+		compatible = "denx,uimage";
+	};
+};

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

@@ -152,6 +152,14 @@ ath79_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0@eth0" "1:lan:1" "2:lan:2" "3:lan:3" "6:lan:4"
 		;;
+	asus,zenwifi-cd6n)
+		ucidef_add_switch "switch0" \
+			"0@eth0" "1:lan:1" "4:lan:2"
+		;;
+	asus,zenwifi-cd6r)
+		ucidef_add_switch "switch0" \
+			"0@eth0" "1:lan:2" "3:lan:1" "4:lan:3" "2:wan"
+		;;
 	atheros,db120)
 		ucidef_add_switch "switch0" \
 			"0@eth0" "2:lan" "3:lan" "4:lan" "5:lan" "1:wan"
@@ -381,6 +389,8 @@ ath79_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0@eth1" "1:lan"
 		;;
+	asus,rt-ac59u|\
+	asus,rt-ac59u-v2|\
 	mercury,mw4530r-v1|\
 	tplink,archer-a7-v5|\
 	tplink,archer-a9-v6|\

target/linux/ath79/image/generic.mk

@@ -483,6 +483,70 @@ define Device/asus_rp-ac66
 endef
 TARGET_DEVICES += asus_rp-ac66
 
+define Device/asus_qcn5502
+  SOC := qcn5502
+  DEVICE_VENDOR := ASUS
+  DEVICE_PACKAGES := kmod-ath10k-ct ath10k-firmware-qca9888-ct
+  KERNEL_INITRAMFS := kernel-bin | append-dtb | uImage none
+  IMAGES += factory.bin
+  IMAGE/factory.bin := append-kernel | pad-to $$$$(BLOCKSIZE) | \
+	append-rootfs | pad-rootfs
+endef
+
+define Device/asus_rt-ac59u
+  $(Device/asus_qcn5502)
+  DEVICE_MODEL := RT-AC59U
+  DEVICE_ALT0_VENDOR := ASUS
+  DEVICE_ALT0_MODEL := RT-AC1200GE
+  DEVICE_ALT1_VENDOR := ASUS
+  DEVICE_ALT1_MODEL := RT-AC1500G PLUS
+  DEVICE_ALT2_VENDOR := ASUS
+  DEVICE_ALT2_MODEL := RT-AC1500UHP
+  DEVICE_ALT3_VENDOR := ASUS
+  DEVICE_ALT3_MODEL := RT-AC57U
+  DEVICE_ALT3_VARIANT := v2
+  DEVICE_ALT4_VENDOR := ASUS
+  DEVICE_ALT4_MODEL := RT-AC58U
+  DEVICE_ALT4_VARIANT := v2
+  DEVICE_ALT5_VENDOR := ASUS
+  DEVICE_ALT5_MODEL := RT-ACRH12
+  IMAGE_SIZE := 16000k
+  DEVICE_PACKAGES += kmod-usb2 kmod-usb-ledtrig-usbport
+endef
+TARGET_DEVICES += asus_rt-ac59u
+
+define Device/asus_rt-ac59u-v2
+  $(Device/asus_qcn5502)
+  DEVICE_MODEL := RT-AC59U
+  DEVICE_VARIANT := v2
+  DEVICE_ALT0_VENDOR := ASUS
+  DEVICE_ALT0_MODEL := RT-AC1300G PLUS
+  DEVICE_ALT0_VARIANT := v3
+  DEVICE_ALT1_VENDOR := ASUS
+  DEVICE_ALT1_MODEL := RT-AC57U
+  DEVICE_ALT1_VARIANT := v3
+  DEVICE_ALT2_VENDOR := ASUS
+  DEVICE_ALT2_MODEL := RT-AC58U
+  DEVICE_ALT2_VARIANT := v3
+  IMAGE_SIZE := 32384k
+  DEVICE_PACKAGES += kmod-usb2 kmod-usb-ledtrig-usbport
+endef
+TARGET_DEVICES += asus_rt-ac59u-v2
+
+define Device/asus_zenwifi-cd6n
+  $(Device/asus_qcn5502)
+  DEVICE_MODEL := ZenWiFi CD6N
+  IMAGE_SIZE := 16000k
+endef
+TARGET_DEVICES += asus_zenwifi-cd6n
+
+define Device/asus_zenwifi-cd6r
+  $(Device/asus_qcn5502)
+  DEVICE_MODEL := ZenWiFi CD6R
+  IMAGE_SIZE := 32384k
+endef
+TARGET_DEVICES += asus_zenwifi-cd6r
+
 define Device/atheros_db120
   $(Device/loader-okli-uimage)
   SOC := ar9344