ath79: add support for MikroTik RouterBOARD wAP G-5HacT2HnD

This commit adds support for the MikroTik RouterBOARD wAP G-5HacT2HnD
(wAP AC), a small weatherproof dual band, dual-radio 802.11ac
wireless AP with integrated omnidirectional anntennae and one
10/100/1000 Mbps Ethernet port.

See https://mikrotik.com/product/RBwAPG-5HacT2HnD for more info.

Specifications:
 - SoC: Qualcomm Atheros QCA9556
 - RAM: 64 MB
 - Storage: 16 MB NOR
 - Wireless:
   · Atheros AR9550 (SoC) 802.11b/g/n 2x2:2, 2 dBi antennae
   · Qualcomm QCA9880 802.11a/n/ac 3x3:3, 2 dBi antennae
 - Ethernet: Atheros AG71xx (SoC, AR8033), 1x 1000/100/10 port,
   passive PoE in

Working:
 - Board/system detection
 - Sysupgrade
 - Serial console
 - Ethernet
 - 2.4 GHz radio
 - 5 GHz radio and LED
 - Reset button

Not working/Unsupported:
 - 2.4 GHz LED
 - AP/CAP LED
 - ZT2046Q SPI temperature and voltage sensor

Patches needed to be applied:
 - https://patchwork.ozlabs.org/patch/1084137/
 - https://patchwork.ozlabs.org/patch/1084136/

Acknowledgments: Robert Marko <robimarko@gmail.com>
                 Andrew Cameron <apcameron@softhome.net>

Signed-off-by: Roger Pueyo Centelles <roger.pueyo@guifi.net>

target/linux/ath79/dts/qca9556_mikrotik_routerboard-wap-g-5hact2hnd.dts

@@ -0,0 +1,178 @@
+// 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 "qca9557.dtsi"
+
+/ {
+	compatible = "mikrotik,routerboard-wap-g-5hact2hnd", "qca,qca9556";
+	model = "MikroTik RouterBOARD wAP G-5HacT2HnD";
+
+	aliases {
+		serial0 = &uart;
+		mdio-gpio1 = &mdio2;
+		label-mac-device = &eth1;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8";
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+
+	mdio2: mdio {
+		compatible = "virtual,mdio-gpio";
+
+		gpios = <&gpio 12 GPIO_ACTIVE_HIGH>, /* MDC */
+			<&gpio 11 GPIO_ACTIVE_HIGH>; /* MDIO */
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		phy1: ethernet-phy@1 {
+			reg = <0>;
+			device_type = "ethernet-phy";
+
+			phy-mode = "sgmii";
+		};
+	};
+};
+
+&mdio0 {
+	status = "okay";
+
+	phy0: ethernet-phy@0 {
+		reg = <17>;
+		phy-mode = "rgmii-id";
+	};
+
+	switch0@1f {
+		compatible = "qca,ar8327";
+		reg = <0x1f>;
+		qca,ar8327-initvals = <
+			0x04 0x87600000 /* PORT0 PAD MODE CTRL */
+			0x0c 0x00080080 /* PORT6 PAD MODE CTRL */
+			0x10 0x81000080 /* POWER_ON_STRIP */
+
+			0x7c 0x0000007e /* PORT0_STATUS */
+			0x94 0x0000007e /* PORT6 STATUS */
+			>;
+	};
+};
+
+&mdio1 {
+	status = "okay";
+
+	compatible = "virtual,mdio-gpio";
+
+	phy2: ethernet-phy@2 {
+		reg = <2>;
+		phy-mode = "sgmii";
+		at803x-override-sgmii-link-check;
+	};
+};
+
+&eth0 {
+	compatible = "syscon", "simple-mfd";
+};
+
+&eth1 {
+	status = "okay";
+
+	mtd-mac-address = <&art 0x10>;
+
+	pll-data = <0x03000101 0x80000101 0x80001313>;
+	phy-handle = <&phy1>;
+
+	qca955x-sgmii-fixup;
+
+	gmac-config {
+		device = <&gmac>;
+	};
+};
+
+&gpio {
+	status = "okay";
+};
+
+&spi {
+	status = "okay";
+
+	num-cs = <1>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <104000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "routerboot";
+				reg = <0x000000 0x00e000>;
+				read-only;
+			};
+
+			art: partition@e000 {
+				label = "art";
+				reg = <0x000e000 0x001000>;
+				read-only;
+			};
+
+			partition@f000 {
+				label = "bios";
+				reg = <0x000f000 0x001000>;
+				read-only;
+			};
+
+			partition@10000 {
+				label = "routerboot2";
+				reg = <0x010000 0x00f000>;
+				read-only;
+			};
+
+			partition@1f000 {
+				label = "soft_config";
+				reg = <0x001f000 0x001000>;
+			};
+
+			partition@20000 {
+				compatible = "mikrotik,minor";
+				label = "firmware";
+				reg = <0x020000 0xfe0000>;
+			};
+		};
+	};
+};
+
+&uart {
+	status = "okay";
+};
+
+&wmac {
+	status = "okay";
+
+	qca,no-eeprom;
+};
+
+&pcie0 {
+	status = "okay";
+
+	wifi@0,0 {
+		compatible = "qcom,ath10k";
+		reg = <0 0 0 0 0>;
+	};
+};

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

@@ -20,6 +20,7 @@ ath79_setup_interfaces()
 	devolo,dvl1750x|\
 	engenius,ecb1750|\
 	glinet,gl-ar300m-lite|\
+	mikrotik,routerboard-wap-g-5hact2hnd|\
 	netgear,ex6400|\
 	netgear,ex7300|\
 	ocedo,koala|\

target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom

@@ -3,6 +3,7 @@
 [ -e /lib/firmware/$FIRMWARE ] && exit 0
 
 . /lib/functions/caldata.sh
+. /lib/functions/mikrotik-caldata.sh
 
 board=$(board_name)
 
@@ -39,6 +40,10 @@ case "$FIRMWARE" in
 		caldata_extract "art" 0x1000 0x440
 		ath9k_patch_mac $(mtd_get_mac_ascii u-boot-env ethaddr)
 		;;
+	mikrotik,routerboard-wap-g-5hact2hnd)
+		mikrotik_caldata_extract "art" 0x1000 0x440
+		ath9k_patch_mac $(macaddr_add $(mtd_get_mac_binary art 0x10) +2)
+		;;
 	nec,wg800hp)
 		caldata_extract "art" 0x1000 0x440
 		ath9k_patch_mac $(mtd_get_mac_text board_data 0x680)

target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/11-ath10k-caldata

@@ -4,6 +4,7 @@
 
 . /lib/functions/caldata.sh
 . /lib/functions/k2t.sh
+. /lib/functions/mikrotik-caldata.sh
 
 board=$(board_name)
 
@@ -64,6 +65,9 @@ case "$FIRMWARE" in
 		caldata_extract "art" 0x5000 0x844
 		ath10k_patch_mac $(macaddr_add $(mtd_get_mac_binary art 0x0) +2)
 		;;
+	mikrotik,routerboard-wap-g-5hact2hnd)
+		mikrotik_caldata_extract "art" 0x5000 0x844
+		;;
 	nec,wg800hp)
 		caldata_extract "art" 0x5000 0x844
 		ath10k_patch_mac $(mtd_get_mac_text board_data 0x880)

target/linux/ath79/generic/base-files/lib/functions/mikrotik-caldata.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+#
+# Copyright (C) 2019 Robert Marko <robimarko@gmail.com>
+# Copyright (C) 2019 Roger Pueyo Centelles <roger.pueyo@guifi.net>
+#
+# Helper function to extract MAC addresses and calibration data for MikroTik
+#
+mikrotik_caldata_extract() {
+	local part=$1
+	local offset=$(($2))
+	local count=$(($3))
+	local mtd
+	local erdfile="/lib/firmware/erd.bin"
+
+	mtd=$(find_mtd_chardev $part)
+	[ -n "$mtd" ] || caldata_die "no mtd device found for partition $part"
+
+	rbextract -e $mtd $erdfile
+
+	dd if=$erdfile of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
+		caldata_die "failed to extract calibration data from $mtd"
+}

target/linux/ath79/image/common-mikrotik.mk

@@ -1,5 +1,6 @@
 define Device/mikrotik
 	DEVICE_VENDOR := MikroTik
+	DEVICE_PACKAGES := rbextract rbcfg
 	BOARD_NAME := routerboard
 	LOADER_TYPE := elf
 	KERNEL := kernel-bin | append-dtb | lzma | loader-kernel

target/linux/ath79/image/generic.mk

@@ -694,6 +694,19 @@ define Device/librerouter_librerouter-v1
 endef
 TARGET_DEVICES += librerouter_librerouter-v1
 
+define Device/mikrotik_routerboard-wap-g-5hact2hnd
+  $(Device/mikrotik)
+  SOC := qca9556
+  DEVICE_MODEL := RouterBOARD wAP G-5HacT2HnD (wAP AC)
+  IMAGE_SIZE := 16000k
+  IMAGE/sysupgrade.bin := append-kernel | kernel2minor -s 1024 -e | \
+	pad-to $$$$(BLOCKSIZE) | append-rootfs | pad-rootfs | \
+	append-metadata | check-size $$$$(IMAGE_SIZE)
+  DEVICE_PACKAGES += kmod-ath10k-ct-smallbuffers ath10k-firmware-qca988x-ct
+  SUPPORTED_DEVICES += rb-wapg-5hact2hnd
+endef
+TARGET_DEVICES += mikrotik_routerboard-wap-g-5hact2hnd
+
 define Device/nec_wg1200cr
   SOC := qca9563
   DEVICE_VENDOR := NEC