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ramips: add support for Archer C50 v4

This adds support for the TP-Link Archer C50 v4.
It uses the same hardware as the v3 variant, sharing the same FCC-ID.

CPU:   MediaTek MT7628 (580MHz)
RAM:   64M DDR2
FLASH: 8M SPI
WiFi:  2.4GHz 2x2 MT7628 b/g/n integrated
WiFI:  5GHz 2x2 MT7612 a/n/ac
ETH:   1x WAN 4x LAN
LED:   Power, WiFi2, WiFi5, LAN, WAN, WPS
BTN:   WPS/WiFi, RESET
UART:  Near ETH ports, 115200 8n1, TP-Link pinout

Create Factory image
--------------------
As all installation methods require a U-Boot to be integrated into the
Image (and we do not ship one with the image) we are not able to create
an image in the OpenWRT build-process.

Download a TP-Link image from their Wesite and a OpenWRT sysupgrade
image for the device and build yourself a factory image like following:

TP-Link image:             tpl.bin
OpenWRT sysupgrade image:  owrt.bin

 > dd if=tpl.bin of=boot.bin bs=131584 count=1
 > cat owrt.bin >> boot.bin

Installing via Web-UI
---------------------
Upload the boot.bin via TP-Links firmware upgrade tool in the
web-interface.

Installing via Recovery
-----------------------
Activate Web-Recovery by beginning the upgrade Process with a
Firmware-Image from TP-Link. After starting the Firmware Upgrade,
wait ~3 seconds (When update status is switching to 0%), then
disconnect the power supply from the device. Upgrade flag (which
activates Web-Recovery) is written before the OS-image is touched and
removed after write is succesfull, so this procedure should be safe.

Plug the power back in. It will come up in Recovery-Mode on 192.168.0.1.
When active, all LEDs but the WPS LED are off.
Remeber to assign yourself a static IP-address as DHCP is not active in
this mode.

The boot.bin can now be uploaded and flashed using the web-recovery.

Installing via TFTP
-------------------
Prepare an image like following (Filenames from factory image steps
apply here)

 > dd if=/dev/zero of=tp_recovery.bin bs=196608 count=1
 > dd if=tpl.bin of=tmp.bin bs=131584 count=1
 > dd if=tmp.bin of=boot.bin bs=512 skip=1
 > cat boot.bin >> tp_recovery.bin
 > cat owrt.bin >> tp_recovery.bin

Place tp_recovery.bin in root directory of TFTP server and listen on
192.168.0.66/24.

Connect router LAN ports with your computer and power up the router
while pressing the reset button. The router will download the image via
tftp and after ~1 Minute reboot into OpenWRT.

U-Boot CLI
----------
U-Boot CLI can be activated by holding down '4' on bootup.

Dual U-Boot
-----------
This is the first TP-Link MediaTek device to feature a split-uboot
design. The first (factory-uboot) provides recovery via TFTP and HTTP,
jumping straight into the second (firmware-uboot) if no recovery needs
to be performed. The firmware-uboot unpacks and executed the kernel.

Web-Recovery
------------
TP-Link integrated a new Web-Recovery like the one on the Archer C7v4 /
TL-WR1043v5. Stock-firmware sets a flag in the "romfile" partition
before beginning to write and removes it afterwards. If the router boots
with this flag set, bootloader will automatically start Web-recovery and
listens on 192.168.0.1. This way, the vendor-firmware or an OpenWRT
factory image can be written.

By doing the same while performing sysupgrade, we can take advantage of
the Web-recovery in OpenWRT.

It is important to note that Web-Recovery is only based on this flag. It
can't detect e.g. a crashing kernel or other means. Once activated it
won't boot the OS before a recovery action (either via TFTP or HTTP) is
performed. This recovery-mode is indicated by an illuminated WPS-LED on
boot.

Signed-off-by: David Bauer <mail@david-bauer.net>
  • Loading branch information...
blocktrron authored and mkresin committed Dec 31, 2018
1 parent 28cd2ca commit 01dcd574a24864c10a9c4df4304a3ce0da5c11a9
@@ -336,7 +336,8 @@ tplink,c20-v4)
ucidef_set_led_switch "wan" "wan" "$boardname:green:wan" "switch0" "0x01"
ucidef_set_led_netdev "wlan2g" "wlan2g" "$boardname:green:wlan2g" "wlan0"
;;
tplink,c50-v3)
tplink,c50-v3|\
tplink,c50-v4)
ucidef_set_led_switch "lan" "lan" "$boardname:green:lan" "switch0" "0x1e"
ucidef_set_led_switch "wan" "wan" "$boardname:green:wan" "switch0" "0x01"
ucidef_set_led_wlan "wlan2g" "wlan2g" "$boardname:green:wlan2g" "phy0tpt"
@@ -229,6 +229,7 @@ ramips_setup_interfaces()
skylab,skw92a|\
tplink,c20-v4|\
tplink,c50-v3|\
tplink,c50-v4|\
tplink,tl-mr3420-v5|\
tplink,tl-wr842n-v5|\
tl-wr840n-v4|\
@@ -44,6 +44,10 @@ platform_do_upgrade() {
ubnt-erx-sfp)
nand_do_upgrade "$ARGV"
;;
tplink,c50-v4)
MTD_ARGS="-t romfile"
default_do_upgrade "$ARGV"
;;
*)
default_do_upgrade "$ARGV"
;;
@@ -0,0 +1,99 @@
// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
/dts-v1/;

#include "TPLINK-8M-SPLIT-UBOOT.dtsi"

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>

/ {
compatible = "tplink,c50-v4", "mediatek,mt7628an-soc";
model = "TP-Link Archer C50 v4";

aliases {
led-boot = &led_power;
led-failsafe = &led_power;
led-running = &led_power;
led-upgrade = &led_power;
};

keys {
compatible = "gpio-keys-polled";
poll-interval = <20>;

reset {
label = "reset";
gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
linux,code = <KEY_RESTART>;
};

rfkill {
label = "rfkill";
gpios = <&gpio0 5 GPIO_ACTIVE_LOW>;
linux,code = <KEY_RFKILL>;
};
};

leds {
compatible = "gpio-leds";

led_power: power {
label = "c50-v4:green:power";
gpios = <&gpio0 11 GPIO_ACTIVE_LOW>;
};

wlan2 {
label = "c50-v4:green:wlan2g";
gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
};

wlan5 {
label = "c50-v4:green:wlan5g";
gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
};

lan {
label = "c50-v4:green:lan";
gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
};

wan {
label = "c50-v4:green:wan";
gpios = <&gpio1 7 GPIO_ACTIVE_LOW>;
};

wan_orange {
label = "c50-v4:orange:wan";
gpios = <&gpio1 8 GPIO_ACTIVE_LOW>;
};

wps {
label = "c50-v4:green:wps";
gpios = <&gpio1 11 GPIO_ACTIVE_LOW>;
};
};
};

&pinctrl {
state_default: pinctrl0 {
gpio {
ralink,group = "i2c", "p0led_an", "p1led_an", "p2led_an",
"p3led_an", "p4led_an", "wdt", "wled_an";
ralink,function = "gpio";
};
};
};

&pcie {
status = "okay";
};

&pcie0 {
wifi@0,0 {
reg = <0x0000 0 0 0 0>;
mediatek,mtd-eeprom = <&radio 0x8000>;
ieee80211-freq-limit = <5000000 6000000>;
mtd-mac-address = <&rom 0xf100>;
mtd-mac-address-increment = <(-1)>;
};
};
@@ -0,0 +1,90 @@
// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
#include "mt7628an.dtsi"

/ {
chosen {
bootargs = "console=ttyS0,115200";
};

memory@0 {
device_type = "memory";
reg = <0x0 0x4000000>;
};
};

&spi0 {
status = "okay";

flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <10000000>;
m25p,chunked-io = <32>;

partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;

partition@0 {
label = "factory-uboot";
reg = <0x0 0x30000>;
read-only;
};

partition@30000 {
label = "boot";
reg = <0x30000 0x20000>;
read-only;
};

partition@50000 {
compatible = "tplink,firmware";
label = "firmware";
reg = <0x50000 0x770000>;
};

partition@7c0000 {
label = "config";
reg = <0x7c0000 0x10000>;
read-only;
};

rom: partition@7d0000 {
label = "rom";
reg = <0x7d0000 0x10000>;
read-only;
};

partition@7e0000 {
label = "romfile";
reg = <0x7e0000 0x10000>;
};

radio: partition@7f0000 {
label = "radio";
reg = <0x7f0000 0x10000>;
read-only;
};
};
};
};

&ehci {
status = "disabled";
};

&ohci {
status = "disabled";
};

&wmac {
status = "okay";
mtd-mac-address = <&rom 0xf100>;
mediatek,mtd-eeprom = <&radio 0x0>;
};

&ethernet {
mtd-mac-address = <&rom 0xf100>;
mediatek,portmap = "llllw";
};
@@ -247,6 +247,21 @@ define Device/tplink_c50-v3
endef
TARGET_DEVICES += tplink_c50-v3

define Device/tplink_c50-v4
$(Device/tplink)
DTS := ArcherC50V4
IMAGE_SIZE := 7616k
DEVICE_TITLE := TP-Link ArcherC50 v4
TPLINK_FLASHLAYOUT := 8MSUmtk
TPLINK_HWID := 0x001D589B
TPLINK_HWREV := 0x93
TPLINK_HWREVADD := 0x2
TPLINK_HVERSION := 3
DEVICE_PACKAGES := kmod-mt76x2
IMAGES := sysupgrade.bin
endef
TARGET_DEVICES += tplink_c50-v4

define Device/tplink_tl-mr3020-v3
$(Device/tplink)
DTS := TL-MR3020V3

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