ath79: add support for D-Link DCH-G020 Rev. A1

The DCH-G020 is a Smart Home Gateway for Z-Wave devices.

Specifications:

 * QCA9531, 16 MiB Flash, 64 MiB RAM
 * On-Board USB SD3503A Z-Wave dongle
 * GL850 USB 2.0 Hub (one rear port, internal Z-Wave)
 * Two Ethernet Ports (10/100)

Installation:

 * Web UI: http://192.168.0.60 (or different address obtained via DHCP)
   Login with 'admin' and the 6-digit PIN Code from the bottom label
 * Recovery Web UI: Keep reset button pressed during power-on
   until LED starts flashing red, upgrade via http://192.168.0.60
 * Some modern browsers may have problems flashing via the Web UI,
   if this occurs consider booting to recovery mode and flashing via:
   curl -F \
     files=@openwrt-ath79-generic-dlink_dch-g020-a1-squashfs-factory.bin \
     http://192.168.0.60/cgi/index

Known issues:

 * Real-Time-Clock is not working as there is currently no matching driver
   It is still included in the dts as compatible = "pericom,pt7c43390";
 * openzwave was tested on v19.07 (running MinOZW as a proof-of-concept),
   but the package grew too big as lots of device pictures were included,
   thus any use of Z-Wave is up to the user (e.g. extroot and domoticz)

The device will use the same MAC address for both wired and wireless
interfaces, however it is stored at two different locations in the flash.

Signed-off-by: Sebastian Schaper <openwrt@sebastianschaper.net>

4 files changed, 207 insertions, 0 deletions

diff --git a/target/linux/ath79/dts/qca9531_dlink_dch-g020-a1.dts b/target/linux/ath79/dts/qca9531_dlink_dch-g020-a1.dts
new file mode 100644
index 0000000000..5d6aebf92f
--- /dev/null
+++ b/target/linux/ath79/dts/qca9531_dlink_dch-g020-a1.dts
@@ -0,0 +1,171 @@
+// 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 = "dlink,dch-g020-a1", "qca,qca9531";
+	model = "D-Link DCH-G020 A1";
+
+	aliases {
+		led-boot = &led_power;
+		led-failsafe = &led_power;
+		led-running = &led_power;
+		led-upgrade = &led_power;
+	};
+
+	i2c {
+		compatible = "i2c-gpio";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		sda-gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+		scl-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+
+		gpio_ext: gpio_ext@38 {
+			compatible = "nxp,pca9554";
+			reg = <0x38 0x1>;
+
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+
+		rtc@30 {
+			compatible = "pericom,pt7c43390";
+			reg = <0x30 0x8>;
+		};
+	};
+
+	gpio-export {
+		compatible = "gpio-export";
+
+		usb_power {
+			label = "d-link:power:usb";
+			gpio-export,name = "d-link:power:usb";
+			gpio-export,output = <0>;
+			gpios = <&gpio_ext 3 GPIO_ACTIVE_LOW>;
+		};
+
+		zwave_power {
+			label = "d-link:power:zwave";
+			gpio-export,name = "d-link:power:zwave";
+			gpio-export,output = <0>;
+			gpios = <&gpio_ext 1 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		wps {
+			label = "wps";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+		};
+
+		reset {
+			label = "reset";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power: power {
+			label = "d-link:green:power";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+		};
+
+		status {
+			label = "d-link:red:status";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&spi {
+	status = "okay";
+
+	num-cs = <1>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x10000>;
+				read-only;
+			};
+
+			art: partition@10000 {
+				label = "art";
+				reg = <0x10000 0x10000>;
+				read-only;
+			};
+
+			partition@20000 {
+				label = "mp";
+				reg = <0x20000 0x10000>;
+				read-only;
+			};
+
+			partition@30000 {
+				label = "config";
+				reg = <0x30000 0x10000>;
+				read-only;
+			};
+
+			partition@40000 {
+				label = "bootarg";
+				reg = <0x40000 0x10000>;
+				read-only;
+			};
+
+			partition@50000 {
+				label = "firmware";
+				reg = <0x50000 0xe70000>;
+				compatible = "denx,uimage";
+			};
+
+			partition@ec0000 {
+				label = "dlink";
+				reg = <0xec0000 0x140000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&uart {
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+};
+
+&usb_phy {
+	status = "okay";
+};
+
+&eth0 {
+	status = "okay";
+};
+
+&wmac {
+	status = "okay";
+
+	mtd-cal-data = <&art 0x1000>;
+};
diff --git a/target/linux/ath79/generic/base-files/etc/board.d/02_network b/target/linux/ath79/generic/base-files/etc/board.d/02_network
index f2b6ef0aed..4580f3ab4e 100755
--- a/target/linux/ath79/generic/base-files/etc/board.d/02_network
+++ b/target/linux/ath79/generic/base-files/etc/board.d/02_network
@@ -147,6 +147,10 @@ ath79_setup_interfaces()
 	dlink,dap-2695-a1)
 		ucidef_add_switch "switch0" "0@eth0" "2:lan" "3:wan" "6@eth1"
 		;;
+	dlink,dch-g020-a1)
+		ucidef_add_switch "switch0" \
+			"0@eth0" "1:lan:2" "2:lan:1"
+		;;
 	dlink,dir-825-b1)
 		ucidef_set_interface_wan "eth1"
 		ucidef_add_switch "switch0" \
@@ -379,6 +383,10 @@ ath79_setup_macs()
 	dlink,dap-2695-a1)
 		label_mac=$(mtd_get_mac_ascii bdcfg "wlanmac")
 		;;
+	dlink,dch-g020-a1)
+		lan_mac=$(mtd_get_mac_text "mp" 0x1)
+		label_mac=$lan_mac
+		;;
 	dlink,dir-825-b1)
 		lan_mac=$(mtd_get_mac_text "caldata" 0xffa0)
 		wan_mac=$(mtd_get_mac_text "caldata" 0xffb4)
diff --git a/target/linux/ath79/generic/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac b/target/linux/ath79/generic/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac
index f814bd46ad..cf582b8465 100644
--- a/target/linux/ath79/generic/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac
+++ b/target/linux/ath79/generic/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac
@@ -17,6 +17,9 @@ case "$board" in
 	adtran,bsap1840)
 		macaddr_add "$(mtd_get_mac_binary 'Board data' 2)" $(($PHYNBR * 8 + 1)) > /sys${DEVPATH}/macaddress
 		;;
+	dlink,dch-g020-a1)
+		mtd_get_mac_text "mp" 0x13 > /sys${DEVPATH}/macaddress
+		;;
 	iodata,wn-ac1600dgr)
 		# There is no eeprom data for 5 GHz wlan in "art" partition
 		# which would allow to patch the macaddress
diff --git a/target/linux/ath79/image/generic.mk b/target/linux/ath79/image/generic.mk
index d8cac425e8..14e72140dc 100644
--- a/target/linux/ath79/image/generic.mk
+++ b/target/linux/ath79/image/generic.mk
@@ -50,6 +50,17 @@ define Build/cybertan-trx
 	-rm $@-empty.bin
 endef
 
+define Build/mkdapimg2
+	$(STAGING_DIR_HOST)/bin/mkdapimg2 \
+		-i $@ -o $@.new \
+		-s $(DAP_SIGNATURE) \
+		-v $(VERSION_DIST)-$(firstword $(subst +, , \
+			$(firstword $(subst -, ,$(REVISION))))) \
+		-r Default \
+		$(if $(1),-k $(1))
+	mv $@.new $@
+endef
+
 define Build/mkmylofw_16m
 	$(eval device_id=$(word 1,$(1)))
 	$(eval revision=$(word 2,$(1)))
@@ -563,6 +574,20 @@ define Device/dlink_dap-2695-a1
 endef
 TARGET_DEVICES += dlink_dap-2695-a1
 
+define Device/dlink_dch-g020-a1
+  SOC := qca9531
+  DEVICE_VENDOR := D-Link
+  DEVICE_MODEL := DCH-G020
+  DEVICE_VARIANT := A1
+  DEVICE_PACKAGES := kmod-gpio-pca953x kmod-i2c-gpio kmod-usb2 kmod-usb-acm
+  IMAGES += factory.bin
+  IMAGE_SIZE := 14784k
+  IMAGE/factory.bin := append-kernel | pad-to $$$$(BLOCKSIZE) | \
+	append-rootfs | pad-rootfs | check-size | mkdapimg2 0x20000
+  DAP_SIGNATURE := HONEYBEE-FIRMWARE-DCH-G020
+endef
+TARGET_DEVICES += dlink_dch-g020-a1
+
 define Device/dlink_dir-505
   SOC := ar9330
   DEVICE_VENDOR := D-Link