mediatek: add support for Buffalo WSR-3200AX4S

Buffalo WSR-3200AX4S is a 2.4/5 GHz band 11ax (Wi-Fi 6) router, based on
MT7622B.

Specification:

- SoC         : MediaTek MT7622B
- RAM         : DDR3 512 MiB
- Flash       : SPI-NAND 128 MiB (Winbond W25N01GVZEIG)
- WLAN        : 2.4/5 GHz 4T4R
  - 2.4 GHz   : MediaTek MT7622B (SoC)
  - 5 GHz     : MediaTek MT7915
- Ethernet    : 5x 10/100/1000 Mbps
  - Switch    : MediaTek MT7531
- LEDs/Keys   : 6x/5x (2x: buttons, 3x: slide-switches)
- UART        : through-hole on PCB (J4)
  - assignment: 3.3V, GND, TX, RX from tri-angle marking
  - settings  : 115200n8
- Power       : 12 VDC, 1.5 A

Flash instruction using factory.bin image:

1. Boot WSR-3200AX4S with "Router" mode
2. Access to "http://192.168.11.1/" and open firmware update page
   ("ファームウェア更新")
3. Select the OpenWrt factory.bin image and click update ("更新実行")
   button
4. Wait ~120 seconds to complete flashing

Note:

- This device has 2x OS images on flash. The first one will always be
  used for booting and the secondary is for backup.

- This support generates multiple factory*.bin image:

  - factory.bin      : for flashing from OEM WebUI
  - factory-uboot.bin: for flashing from U-Boot or clean installation
                       via sysupgrade (don't use for normal sysupgrade)

Known issues:

- Wi-Fi MAC addresses won't be applied to each adapter.

MAC Addresses:

LAN    : C4:3C:EA:xx:xx:60 (board_data, mac (text))
WAN    : C4:3C:EA:xx:xx:60 (board_data, mac (text))
2.4 GHz: C4:3C:EA:xx:xx:61
5 GHz  : C4:3C:EA:xx:xx:68

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
(cherry picked from commit 7383eb266b)

target/linux/mediatek/mt7622/base-files/etc/board.d/02_network

@@ -9,6 +9,7 @@ mediatek_setup_interfaces()
 
 	case $board in
 	bananapi,bpi-r64|\
+	buffalo,wsr-3200ax4s|\
 	elecom,wrc-x3200gst3|\
 	linksys,e8450|\
 	linksys,e8450-ubi|\
@@ -55,6 +56,11 @@ mediatek_setup_macs()
 	local label_mac=""
 
 	case $board in
+	buffalo,wsr-3200ax4s)
+		lan_mac=$(mtd_get_mac_ascii board_data "mac")
+		wan_mac=$lan_mac
+		label_mac=$lan_mac
+		;;
 	reyee,ax3200-e5|\
 	ruijie,rg-ew3200gx-pro)
 		lan_mac=$(macaddr_add $(get_mac_label) 1)

target/linux/mediatek/mt7622/base-files/etc/hotplug.d/ieee80211/11_fix_wifi_mac

@@ -13,6 +13,11 @@ case "$board" in
 	bananapi,bpi-r64)
 		[ "$PHYNBR" = "0" ] && macaddr_add $(cat /sys/class/net/eth0/address) 2 > /sys${DEVPATH}/macaddress
 		;;
+	buffalo,wsr-3200ax4s)
+		basemac=$(mtd_get_mac_ascii board_data "mac")
+		[ "$PHYNBR" = "0" ] && macaddr_add $basemac 1 > /sys${DEVPATH}/macaddress
+		[ "$PHYNBR" = "1" ] && macaddr_add $basemac 8 > /sys${DEVPATH}/macaddress
+		;;
 	reyee,ax3200-e5|\
 	ruijie,rg-ew3200gx-pro)
 		[ "$PHYNBR" = "0" ] && macaddr_add $(get_mac_label) 3 > /sys${DEVPATH}/macaddress

target/linux/mediatek/mt7622/base-files/etc/uci-defaults/09_fix_crc

@@ -7,4 +7,8 @@ buffalo,wsr-2533dhp2)
 	mtd -M 0x44485032 ${kernel_size:+-c 0x$kernel_size} fixtrx firmware && exit 0
 	exit 1
 	;;
+buffalo,wsr-3200ax4s)
+	mtd -M 0x44485033 ${kernel_size:+-c 0x$kernel_size} fixtrx firmware && exit 0
+	exit 1
+	;;
 esac

target/linux/mediatek/mt7622/base-files/lib/upgrade/platform.sh

@@ -21,7 +21,8 @@ platform_do_upgrade() {
 			;;
 		esac
 		;;
-	buffalo,wsr-2533dhp2)
+	buffalo,wsr-2533dhp2|\
+	buffalo,wsr-3200ax4s)
 		local magic="$(get_magic_long "$1")"
 
 		# use "mtd write" if the magic is "DHP2 (0x44485032)"
@@ -67,7 +68,8 @@ platform_check_image() {
 	[ "$#" -gt 1 ] && return 1
 
 	case "$board" in
-	buffalo,wsr-2533dhp2)
+	buffalo,wsr-2533dhp2|\
+	buffalo,wsr-3200ax4s)
 		buffalo_check_image "$board" "$magic" "$1" || return 1
 		;;
 	elecom,wrc-x3200gst3|\