[OpenWrt-Devel] [PATCH v3] ath79: add support for Fritz!Box 4020

David Bauer mail at david-bauer.net
Sat Aug 18 12:30:46 EDT 2018 

This commit adds support for the AVM Fritz!Box 4020 WiFi-router.

SoC:   Qualcomm Atheros QCA9561 (Dragonfly) 750MHz
RAM:   Winbond W971GG6KB-25
FLASH: Macronix MX25L12835F
WiFi:  QCA9561 b/g/n 3x3 450Mbit/s
USB:   1x USB 2.0
IN:    WPS button, WiFi button
OUT:   Power LED green, Internet LED green, WLAN LED green,
       LAN LED green, INFO LED green, INFO LED red
UART:  Header Next to Black metal shield
       Pinout is 3.3V - RX - TX - GND (Square Pad is 3.3V)
       The Serial setting is 115200-8-N-1.

Tested and working:
 - Ethernet (LAN + WAN)
 - WiFi (correct MAC)
 - Installation via EVA bootloader
 - OpenWRT sysupgrade
 - Buttons
 - LEDs

Not working:
 - USB port

A few words about the shift-register:
AVM used a trick to control the shift-register for the LEDs with only 2
pins, SERCLK and MOSI. Q7S, normally used for daisy-chaining multiple
shift-registers, pulls the latch, moving the shift register-state to
the storage register. It also pulls down MR (normally pulled up) to
clear the storage register, so the latch gets released and will not be
pulled by the remaining bits in the shift-register. Shift register is
all-zero after this.

For that we need to make sure output 7 is set to high on driver probe.
We accomplish this by using gpio-hogging.

Installation via EVA:
In the first seconds after Power is connected, the bootloader will
listen for FTP connections on 169.254.157.1 (Might also be 192.168.178.1).
Firmware can be uploaded like following:

  ftp> quote USER adam2
  ftp> quote PASS adam2
  ftp> binary
  ftp> debug
  ftp> passive
  ftp> quote MEDIA FLSH
  ftp> put openwrt-sysupgrade.bin mtd1

Note that this procedure might take up to two minutes. After transfer is
complete you need to powercycle the device to boot OpenWRT.

Signed-off-by: David Bauer <mail at david-bauer.net>
---

v3 changes:
 - Rebased onto master
 - Add GPIO-hog to device-tree
 - Add SR description to commit message
 - Removed initvals kernel-patch

 .../ath79/base-files/etc/board.d/01_leds      |   4 +
 .../ath79/base-files/etc/board.d/02_network   |   5 +
 .../etc/hotplug.d/firmware/10-ath9k-eeprom    |   3 +
 .../linux/ath79/dts/qca9561_avm_fritz4020.dts | 180 ++++++++++++++++++
 target/linux/ath79/image/generic.mk           |  14 ++
 5 files changed, 206 insertions(+)
 create mode 100644 target/linux/ath79/dts/qca9561_avm_fritz4020.dts

diff --git a/target/linux/ath79/base-files/etc/board.d/01_leds b/target/linux/ath79/base-files/etc/board.d/01_leds
index 73f350cae2..9d63254a67 100755
--- a/target/linux/ath79/base-files/etc/board.d/01_leds
+++ b/target/linux/ath79/base-files/etc/board.d/01_leds
@@ -17,6 +17,10 @@ avm,fritz300e)
 	ucidef_set_led_rssi "rssimediumhigh" "RSSIMEDIUMHIGH" "$boardname:green:rssi3" "wlan0" "60" "100"
 	ucidef_set_led_rssi "rssihigh" "RSSIHIGH" "$boardname:green:rssi4" "wlan0" "80" "100"
 	;;
+avm,fritz4020)
+	ucidef_set_led_netdev "wan" "WAN" "$boardname:green:wan" "eth0"
+	ucidef_set_led_switch "lan" "LAN" "$boardname:green:lan" "switch0" "0x1E"
+	;;
 buffalo,whr-g301n)
 	ucidef_set_led_netdev "wan" "WAN" "$boardname:green:wan" "eth0"
 	ucidef_set_led_switch "lan1" "LAN1" "$boardname:green:lan1" "switch0" "0x02"
diff --git a/target/linux/ath79/base-files/etc/board.d/02_network b/target/linux/ath79/base-files/etc/board.d/02_network
index 603251954b..1854583418 100755
--- a/target/linux/ath79/base-files/etc/board.d/02_network
+++ b/target/linux/ath79/base-files/etc/board.d/02_network
@@ -44,6 +44,7 @@ ath79_setup_interfaces()
 	etactica,eg200)
 		ucidef_set_interface_lan "eth0" "dhcp"
 		;;
+	avm,fritz4020|\
 	glinet,ar150|\
 	glinet,ar300m)
 		ucidef_set_interfaces_lan_wan "eth1" "eth0"
@@ -155,6 +156,10 @@ ath79_setup_macs()
 	avm,fritz300e)
 		lan_mac=$(fritz_tffs -n maca -i $(find_mtd_part "tffs (1)"))
 		;;
+	avm,fritz4020)
+		lan_mac=$(fritz_tffs -n maca -i $(find_mtd_part "tffs (1)"))
+		wan_mac=$(fritz_tffs -n macb -i $(find_mtd_part "tffs (1)"))
+		;;
 	dlink,dir-825-b1)
 		lan_mac=$(mtd_get_mac_text "caldata" 65440)
 		wan_mac=$(mtd_get_mac_text "caldata" 65460)
diff --git a/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom b/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
index f668a82fa2..9cbce4cecd 100644
--- a/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
+++ b/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
@@ -97,6 +97,9 @@ board=$(board_name)
 case "$FIRMWARE" in
 "ath9k-eeprom-ahb-18100000.wmac.bin")
 	case $board in
+	avm,fritz4020)
+		ath9k_eeprom_extract_reverse "urlader" 5441 1088
+		;;
 	iodata,wn-ac1167dgr|\
 	iodata,wn-ac1600dgr2)
 		ath9k_eeprom_extract "art" 4096 1088
diff --git a/target/linux/ath79/dts/qca9561_avm_fritz4020.dts b/target/linux/ath79/dts/qca9561_avm_fritz4020.dts
new file mode 100644
index 0000000000..6b2a35c35a
--- /dev/null
+++ b/target/linux/ath79/dts/qca9561_avm_fritz4020.dts
@@ -0,0 +1,180 @@
+// 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 "qca956x.dtsi"
+
+/ {
+	compatible = "avm,fritz4020", "qca,qca9560";
+	model = "AVM FRITZ!Box 4020";
+
+	aliases {
+		led-boot = &power;
+		led-failsafe = &info_red;
+		led-running = &power;
+		led-upgrade = &info_red;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200n8";
+	};
+
+	led_spi {
+		compatible = "spi-gpio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		gpio-sck = <&gpio 20 GPIO_ACTIVE_HIGH>;
+		gpio-mosi = <&gpio 19 GPIO_ACTIVE_HIGH>;
+		num-chipselects = <0>;
+
+		led_gpio: led_gpio at 0 {
+			compatible = "fairchild,74hc595";
+			reg = <0>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			registers-number = <1>;
+			lines-initial-states = /bits/ 8 <0xff>;
+			spi-max-frequency = <10000000>;
+
+			gpio_latch_bit {
+				gpio-hog;
+				gpios = <7 GPIO_ACTIVE_HIGH>;
+				output-high;
+				line-name = "gpio-latch-bit";
+			};
+
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		power: power {
+			label = "fritz4020:green:power";
+			gpios = <&led_gpio 2 GPIO_ACTIVE_LOW>;
+			default-state = "on";
+		};
+
+		wlan {
+			label = "fritz4020:green:wlan";
+			gpios = <&led_gpio 3 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "phy0tpt";
+			default-state = "off";
+		};
+
+		lan {
+			label = "fritz4020:green:lan";
+			gpios = <&led_gpio 0 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+		};
+
+		wan {
+			label = "fritz4020:green:wan";
+			gpios = <&led_gpio 4 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+		};
+
+		info {
+			label = "fritz4020:green:info";
+			gpios = <&led_gpio 6 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+		};
+
+		info_red: info_red {
+			label = "fritz4020:red:info";
+			gpios = <&led_gpio 1 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys-polled";
+		poll-interval = <100>;
+
+		wps_button {
+			label = "WPS button";
+			linux,code = <KEY_WPS_BUTTON>;
+			gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
+		};
+
+		wlan_button {
+			label = "WLAN button";
+			linux,code = <KEY_RFKILL>;
+			gpios = <&gpio 21 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&uart {
+	status = "okay";
+};
+
+&gpio {
+	status = "okay";
+};
+
+&spi {
+	status = "okay";
+	num-cs = <1>;
+
+	flash at 0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <25000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition at 0 {
+				label = "urlader";
+				reg = <0x000000 0x020000>;
+				read-only;
+			};
+
+			partition at 1 {
+				label = "firmware";
+				reg = <0x020000 0xee0000>;
+			};
+
+			partition at 2 {
+				label = "tffs (1)";
+				reg = <0xf00000 0x080000>;
+				read-only;
+			};
+
+			partition at 3 {
+				label = "tffs (2)";
+				reg = <0xf80000 0x080000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	phy-mode = "mii";
+	phy-handle = <&swphy0>;
+
+	gmac-config {
+		device = <&gmac>;
+
+		switch-phy-addr-swap = <1>;
+		switch-phy-swap = <1>;
+	};
+};
+
+&eth1 {
+	status = "okay";
+};
+
+&wmac {
+	status = "okay";
+	qca,no-eeprom;
+};
diff --git a/target/linux/ath79/image/generic.mk b/target/linux/ath79/image/generic.mk
index b3eaee48b7..7d307dba2d 100644
--- a/target/linux/ath79/image/generic.mk
+++ b/target/linux/ath79/image/generic.mk
@@ -13,6 +13,20 @@ define Device/avm_fritz300e
 endef
 TARGET_DEVICES += avm_fritz300e
 
+define Device/avm_fritz4020
+  ATH_SOC := qca9561
+  DEVICE_TITLE := AVM FRITZ!Box 4020
+  IMAGE_SIZE := 15232k
+  KERNEL := kernel-bin | append-dtb | lzma | eva-image
+  KERNEL_INITRAMFS := $$(KERNEL)
+  IMAGE/sysupgrade.bin := append-kernel | pad-to 64k | \
+      append-squashfs-fakeroot-be | pad-to 256 | \
+      append-rootfs | pad-rootfs | append-metadata | check-size $$$$(IMAGE_SIZE)
+  DEVICE_PACKAGES := fritz-tffs
+  SUPPORTED_DEVICES += fritz4020
+endef
+TARGET_DEVICES += avm_fritz4020
+
 define Device/buffalo_wzr-hp-g450h
   ATH_SOC := ar7242
   DEVICE_TITLE := Buffalo WZR-HP-G450H
-- 
2.18.0


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