ramips: mt7621: Add Arcadyan WE420223-99 support

The Arcadyan WE420223-99 is a WiFi AC simultaneous dual-band access
point distributed as Experia WiFi by KPN in the Netherlands. It features
two ethernet ports and 2 internal antennas.

Specifications
--------------
SOC   : Mediatek MT7621AT
ETH   : Two 1 gigabit ports, built into the SOC
WIFI  : MT7615DN
BUTTON: Reset
BUTTON: WPS
LED   : Power (green+red)
LED   : WiFi (green+blue)
LED   : WPS (green+red)
LED   : Followme (green+red)
Power : 12 VDC, 1A barrel plug

Winbond variant:
RAM   : Winbond W631GG6MB12J, 1GBIT DDR3 SDRAM
Flash : Winbond W25Q256JVFQ, 256Mb SPI
U-Boot: 1.1.3 (Nov 23 2017 - 16:40:17), Ralink 5.0.0.1

Macronix variant:
RAM   : Nanya NT5CC64M16GP-DI, 1GBIT DDR3 SDRAM
Flash : MX25l25635FMI-10G, 256Mb SPI
U-Boot: 1.1.3 (Dec  4 2017 - 11:37:57), Ralink 5.0.0.1

Serial
------
The serial port needs a TTL/RS-232 3V3 level converter! The Serial
setting is 57600-8-N-1. The board has an unpopulated 2.54mm straight pin
header.

The pinout is: VCC (the square), RX, TX, GND.

Installation
------------
See the Wiki page [1] for more details, it comes down to:

1. Open the device, take off the heat sink
2. Connect the SPI flash chip to a flasher, e.g. a Raspberry Pi. Also
   connect the RESET pin for stability (thanks @FPSUsername for reporting)
3. Make a backup in case you want to revert to stock later
4. Flash the squashfs-factory.trx file to offset 0x50000 of the flash
5. Ensure the bootpartition variable is set to 0 in the U-Boot
   environment located at 0x30000

Note that the U-Boot is password protected, this can optionally be
removed. See the forum [2] for more details.

MAC Addresses(stock)
--------------------
+----------+------------------+-------------------+
| use      | address          | example           |
+----------+------------------+-------------------+
| Device   | label            | 00:00:00:11:00:00 |
| Ethernet | + 3              | 00:00:00:11:00:03 |
| 2g       | + 0x020000f00001 | 02:00:00:01:00:01 |
| 5g       | + 1              | 00:00:00:11:00:01 |
+----------+------------------+-------------------+

The label address is stored in ASCII in the board_data partition

Notes
-----
- This device has a dual-boot partition scheme, but OpenWRT will claim
  both partitions for more storage space.

Known issues
------------
- 2g MAC address does not match stock due to missing support for that in
  macaddr_add
- Only the power LED is configured by default

References
----------
[1] https://openwrt.org/inbox/toh/arcadyan/astoria/we420223-99
[2] https://forum.openwrt.org/t/adding-openwrt-support-for-arcadyan-we420223-99-kpn-experia-wifi/132653

Acked-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Signed-off-by: Harm Berntsen <git@harmberntsen.nl>

3 files changed, 18 insertions, 0 deletions

diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
index c5196c1448..ddbbf9891d 100644
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
@@ -8,6 +8,9 @@ ramips_setup_interfaces()
 	local board="$1"
 
 	case $board in
+	arcadyan,we420223-99)
+		ucidef_set_interface_lan "swp0 swp1"
+		;;
 	ampedwireless,ally-00x19k|\
 	asus,rp-ac56|\
 	asus,rp-ac87|\
@@ -150,6 +153,11 @@ ramips_setup_macs()
 		wan_mac=$(mtd_get_mac_ascii hwconfig HW.WAN.MAC.Address)
 		label_mac=$lan_mac
 		;;
+	arcadyan,we420223-99)
+		label_mac=$(mtd_get_mac_ascii board_data mac)
+		lan_mac=$label_mac
+		ucidef_set_network_device_mac eth0 $(macaddr_add "$label_mac" 3)
+	;;
 	asus,rt-ac65p|\
 	asus,rt-ac85p)
 		wan_mac=$(mtd_get_mac_ascii u-boot-env et1macaddr)
diff --git a/target/linux/ramips/mt7621/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac b/target/linux/ramips/mt7621/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac
index 079f07956d..45bee29d24 100644
--- a/target/linux/ramips/mt7621/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac
+++ b/target/linux/ramips/mt7621/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac
@@ -10,6 +10,15 @@ PHYNBR=${DEVPATH##*/phy}
 board=$(board_name)
 
 case "$board" in
+	arcadyan,we420223-99)
+		if [ "$PHYNBR" = "0" ]; then
+			mac24=$(macaddr_add "$(get_mac_label)" "0xf00001")
+			echo -n "$mac24" > /sys${DEVPATH}/macaddress
+		elif [ "$PHYNBR" = "1" ]; then
+			mac5=$(macaddr_add "$(get_mac_label)" 1)
+			echo -n "$mac5" > /sys${DEVPATH}/macaddress
+		fi
+		;;
 	beeline,smartbox-flash)
 		hw_mac_addr=$(macaddr_add $(mtd_get_mac_encrypted_arcadyan "board_data") 1)
 		[ "$PHYNBR" = "0" ] && echo -n "$hw_mac_addr" > /sys${DEVPATH}/macaddress
diff --git a/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh b/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh
index 830061231d..07c6b80d7b 100755
--- a/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh
@@ -52,6 +52,7 @@ platform_do_upgrade() {
 	case "$board" in
 	ampedwireless,ally-00x19k|\
 	ampedwireless,ally-r1900k|\
+	arcadyan,we420223-99|\
 	asus,rt-ac65p|\
 	asus,rt-ac85p|\
 	asus,rt-ax53u|\