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 7383eb266b64f374c7109ad1db5360bf91dc11c3)

6 files changed, 225 insertions, 2 deletions

diff --git a/target/linux/mediatek/dts/mt7622-buffalo-wsr-3200ax4s.dts b/target/linux/mediatek/dts/mt7622-buffalo-wsr-3200ax4s.dts
new file mode 100644
index 0000000000..678c31b711
--- /dev/null
+++ b/target/linux/mediatek/dts/mt7622-buffalo-wsr-3200ax4s.dts
@@ -0,0 +1,175 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "mt7622-buffalo-wsr.dtsi"
+
+/ {
+	model = "Buffalo WSR-3200AX4S";
+	compatible = "buffalo,wsr-3200ax4s", "mediatek,mt7622";
+
+	memory {
+		reg = <0 0x40000000 0 0x1f000000>;
+	};
+};
+
+&pio {
+	/* Serial NAND is shared pin with SPI-NOR */
+	serial_nand_pins: serial-nand-pins {
+		mux {
+			function = "flash";
+			groups = "snfi";
+		};
+
+		conf-cmd-dat {
+			pins = "SPI_WP", "SPI_HOLD", "SPI_MOSI",
+			       "SPI_MISO", "SPI_CS";
+			input-enable;
+			drive-strength = <16>;
+			bias-pull-up;
+		};
+
+		conf-clk {
+			pins = "SPI_CLK";
+			drive-strength = <16>;
+			bias-pull-down;
+		};
+	};
+};
+
+&mdio {
+	switch@1f {
+		compatible = "mediatek,mt7531";
+		reg = <0x1f>;
+		reset-gpios = <&pio 54 GPIO_ACTIVE_HIGH>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				label = "lan4";
+			};
+
+			port@1 {
+				reg = <1>;
+				label = "lan3";
+			};
+
+			port@2 {
+				reg = <2>;
+				label = "lan2";
+			};
+
+			port@3 {
+				reg = <3>;
+				label = "lan1";
+			};
+
+			port@4 {
+				reg = <4>;
+				label = "wan";
+			};
+
+			port@6 {
+				reg = <6>;
+				label = "cpu";
+				ethernet = <&gmac0>;
+				phy-connection-type = "2500base-x";
+
+				fixed-link {
+					speed = <2500>;
+					full-duplex;
+					pause;
+				};
+			};
+		};
+	};
+};
+
+&snfi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&serial_nand_pins>;
+	status = "okay";
+
+	flash@0 {
+		compatible = "spi-nand";
+		reg = <0>;
+		spi-max-frequency = <104000000>;
+		nand-ecc-engine = <&snfi>;
+		mediatek,bmt-v2;
+		mediatek,bmt-table-size = <0x1000>;
+		/*
+		 * - Preloader - (kernel (6MiB, in firmware))
+		 * - Kernel2 - WTB
+		 */
+		mediatek,bmt-remap-range = <0x0 0x8c0000>,
+					   <0x1ac0000 0x5200000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "Preloader";
+				reg = <0x0 0x80000>;
+				read-only;
+			};
+
+			partition@80000 {
+				label = "ATF";
+				reg = <0x80000 0x40000>;
+				read-only;
+			};
+
+			partition@c0000 {
+				label = "u-boot";
+				reg = <0xc0000 0x80000>;
+				read-only;
+			};
+
+			partition@140000 {
+				label = "u-boot-env";
+				reg = <0x140000 0x80000>;
+				read-only;
+			};
+
+			factory: partition@1c0000 {
+				label = "factory";
+				reg = <0x1c0000 0x100000>;
+				read-only;
+			};
+
+			partition@2c0000 {
+				compatible = "brcm,trx";
+				brcm,trx-magic = <0x33504844>;
+				label = "firmware";
+				reg = <0x2c0000 0x1800000>;
+			};
+
+			partition@1ac0000 {
+				label = "Kernel2";
+				reg = <0x1ac0000 0x1800000>;
+			};
+
+			partition@32c0000 {
+				label = "glbcfg";
+				reg = <0x32c0000 0x200000>;
+				read-only;
+			};
+
+			partition@34c0000 {
+				label = "board_data";
+				reg = <0x34c0000 0x200000>;
+				read-only;
+			};
+
+			partition@36c0000 {
+				label = "WTB";
+				reg = <0x36c0000 0x3600000>;
+				read-only;
+			};
+		};
+	};
+};
diff --git a/target/linux/mediatek/image/mt7622.mk b/target/linux/mediatek/image/mt7622.mk
index 2a5e60989f..50166669e2 100644
--- a/target/linux/mediatek/image/mt7622.mk
+++ b/target/linux/mediatek/image/mt7622.mk
@@ -128,6 +128,37 @@ define Device/buffalo_wsr-2533dhp2
 endef
 TARGET_DEVICES += buffalo_wsr-2533dhp2
 
+define Device/buffalo_wsr-3200ax4s
+  DEVICE_VENDOR := Buffalo
+  DEVICE_MODEL := WSR-3200AX4S
+  DEVICE_DTS := mt7622-buffalo-wsr-3200ax4s
+  IMAGE_SIZE := 24576k
+  BUFFALO_TRX_MAGIC := 0x33504844
+  DEVICE_PACKAGES := kmod-mt7915-firmware
+  DEVICE_DTS_DIR := ../dts
+  KERNEL_SIZE := 6144k
+  BLOCKSIZE := 128k
+  PAGESIZE := 2048
+  UBINIZE_OPTS := -E 5
+  BUFFALO_TAG_PLATFORM := MTK
+  BUFFALO_TAG_VERSION := 9.99
+  BUFFALO_TAG_MINOR := 9.99
+  IMAGES += factory.bin factory-uboot.bin
+  KERNEL_INITRAMFS = kernel-bin | lzma | \
+	fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb with-initrd | \
+	buffalo-trx
+  IMAGE/factory.bin = append-ubi | \
+	buffalo-trx $$$$(BUFFALO_TRX_MAGIC) $$$$@ $(KDIR)/ubi_mark | \
+	buffalo-enc $$(DEVICE_MODEL) $$(BUFFALO_TAG_VERSION) -l | \
+	buffalo-tag-dhp $$(DEVICE_MODEL) JP JP | buffalo-enc-tag -l | buffalo-dhp-image
+  IMAGE/factory-uboot.bin := append-ubi | \
+	buffalo-trx $$$$(BUFFALO_TRX_MAGIC) $$$$@ $(KDIR)/ubi_mark
+  IMAGE/sysupgrade.bin := \
+	buffalo-trx $$$$(BUFFALO_TRX_MAGIC) $(KDIR)/tmp/$$(DEVICE_NAME).null | \
+	sysupgrade-tar kernel=$$$$@ | append-metadata
+endef
+TARGET_DEVICES += buffalo_wsr-3200ax4s
+
 define Device/elecom_wrc-2533gent
   DEVICE_VENDOR := Elecom
   DEVICE_MODEL := WRC-2533GENT
diff --git a/target/linux/mediatek/mt7622/base-files/etc/board.d/02_network b/target/linux/mediatek/mt7622/base-files/etc/board.d/02_network
index 38db921f5c..d1341099bc 100644
--- a/target/linux/mediatek/mt7622/base-files/etc/board.d/02_network
+++ b/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 $(get_mac_label) 1)
diff --git a/target/linux/mediatek/mt7622/base-files/etc/hotplug.d/ieee80211/11_fix_wifi_mac b/target/linux/mediatek/mt7622/base-files/etc/hotplug.d/ieee80211/11_fix_wifi_mac
index f8639e9f40..7ee9f24071 100644
--- a/target/linux/mediatek/mt7622/base-files/etc/hotplug.d/ieee80211/11_fix_wifi_mac
+++ b/target/linux/mediatek/mt7622/base-files/etc/hotplug.d/ieee80211/11_fix_wifi_mac
@@ -13,6 +13,11 @@ case "$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
diff --git a/target/linux/mediatek/mt7622/base-files/etc/uci-defaults/09_fix_crc b/target/linux/mediatek/mt7622/base-files/etc/uci-defaults/09_fix_crc
index 81cb6b18b7..59b00a6e69 100644
--- a/target/linux/mediatek/mt7622/base-files/etc/uci-defaults/09_fix_crc
+++ b/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
diff --git a/target/linux/mediatek/mt7622/base-files/lib/upgrade/platform.sh b/target/linux/mediatek/mt7622/base-files/lib/upgrade/platform.sh
index b37b7b1c6e..ea3176d2d1 100755
--- a/target/linux/mediatek/mt7622/base-files/lib/upgrade/platform.sh
+++ b/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|\