mediatek: filogic: add support for Tenbay WR3000K

mediatek: filogic: add support for Tenbay WR3000K

Tenbay WR3000K is an 802.11ax (Wi-Fi 6) router, based on MediaTek MT7981B.

- SoC: MetiaTek MT7981B
- RAM: Hynex H5TQ2G863GFR 512MiB
- Flash: Winbond W25N01GVZEIG 128MiB
- Wi-Fi: MediaTek MT7976C (2.4GHz/5GHz, 802.11ax, 2x2 MIMO, AX3000)
- MediaTek MT7915E: 2.4GHz and 5GHz
- Ethernet: 1x 10/100/1000 Mbps WAN + 3x 10/100/1000 Mbps LAN
- Switch: MediaTek MT7531AE
- UART: J4 (115200 baud)
- LEDs: Power
- Buttons: Reset, WPS
- PWR: 12V/1A DC, 5.5×2.1 connector

| Vendor  | OpenWrt Interface | Address       | Notes                                          |
|---------|-------------------|---------------|------------------------------------------------|
| WAN     | wan            | Label MAC     |  Stored MAC in factory + offset 4, label MAC is Stored MAC - 2   |
| LAN     | br-lan             | Label MAC+1   |              |
| 2.4GHz  | phy0-ap0          | Label MAC + 2     |             |
| 5GHz    | phy1-ap0          | Label MAC + 3     |              |

- 0x000000000000-0x000000100000 : "BL2"
- 0x000000100000-0x000000180000 : "u-boot-env"
- 0x000000180000-0x000000380000 : "Factory"
- 0x000000380000-0x000000580000 : "FIP"
- 0x000000580000-0x000003580000 : "ubi"
- 0x000003580000-0x000006580000 : "ubi1"
- 0x000006580000-0x0000065a0000 : "Product"
- 0x0000065a0000-0x000007580000 : "Custom"

- The original partition-Ubi partition-Ubi1 is an AB dual system, and Openwrt only uses Ubi. So flash requires modifying the uboot variable `boot_from=ubi` to ensure that it only starts from Ubi.

- The Product and Custom partitions are original and only exist to align with the original layout; they are not used by OpenWrt.

- id: 0, kernel
- id: 1, rootfs
- id: 2, rootfs_data

- **USB-to-TTL Serial Adapter** (e.g., CH340 or CP2102).
- **Dupont Wires** (male-to-male, 3 wires).
- **PC/Laptop** with a serial communication tool.
- Screwdriver (to open the router case).

1. **OpenWrt Firmware**:
   - Download the appropriate `wr3000k-<build_time>-mediatek-filogic-tenbay_wr3000k-squashfs-sysupgrade.bin` firmware file for your router from the [OpenWrt website](https://openwrt.org/).
2. **Serial Communication Tool**:
   - Windows: PuTTY, Tera Term.
   - Linux/Mac: Minicom, screen.
3. (Optional) **TFTP Server**:
   - Install a TFTP server like Tftpd64 or tftp-hpa.

---

1. Open the router casing and locate the **TX, RX, and GND** pins.
2. Connect the router pins to the USB-to-TTL adapter as follows:
   - **TX (router)** → **RX (adapter)**
   - **RX (router)** → **TX (adapter)**
   - **GND (router)** → **GND (adapter)**
3. Do **not** connect the VCC pin to avoid damage.

- **Baud rate**: 115200
- **Data bits**: 8
- **Stop bits**: 1
- **Parity**: None
- **Flow control**: None

---

1. Power on the router and observe the serial terminal output.
2. When prompted (e.g., `Hit any key to stop autoboot: 3`), press the '/' key quickly to interrupt the boot process.
3. You will see the U-Boot Boot Menu:
```plaintext
*** U-Boot Boot Menu ***

    1. Factory mode
    2. Startup system (Default)
    3. Upgrade firmware
    4. Upgrade ATF BL2
    5. Upgrade ATF FIP
    6. Upgrade single image
    7. Load image
    0. U-Boot console

Press UP/DOWN to move, ENTER to select, ESC/CTRL+C to quit
```
4. Select Option 0 by typing 0 and pressing Enter.
5. Input into
```plaintext
MT7981> setenv boot_from ubi
MT7981> saveenv
Saving Environment to MTD... Erasing on MTD device 'nmbm0'... OK
Writing to MTD device 'nmbm0'... OK
OK
MT7981> printenv
baudrate=115200
boot_from=ubi
...
```
the above indicates system will start from *ubi*.
and then type
```plaintext
MT7981> reset
```
will boot from *ubi*

1. Power on the router and observe the serial terminal output.
2. When prompted (e.g., `Hit any key to stop autoboot: 3`), press the '/' key quickly to interrupt the boot process.
3. You will see the U-Boot Boot Menu:
```plaintext
*** U-Boot Boot Menu ***

    1. Factory mode
    2. Startup system (Default)
    3. Upgrade firmware
    4. Upgrade ATF BL2
    5. Upgrade ATF FIP
    6. Upgrade single image
    7. Load image
    0. U-Boot console

Press UP/DOWN to move, ENTER to select, ESC/CTRL+C to quit
```
4. Choose Option 3: Upgrade Firmware
Enter Upgrade Mode
Select Option 3 by typing 3 and pressing Enter.
Upgrade Methods
You will be prompted to choose between:
```plaintext
*** Upgrading Firmware ***

Run image after upgrading? (Y/n): y

Available load methods:
    0 - TFTP client (Default)
    1 - Xmodem
    2 - Ymodem
    3 - Kermit
    4 - S-Record
    5 - RAM

Select (enter for default): 0

Input U-Boot's IP address: 192.168.1.1
Input TFTP server's IP address: 192.168.1.10
Input IP netmask: 255.255.255.0
Input file name: wr3000k-<build_time>-mediatek-filogic-tenbay_wr3000k-squashfs-sysupgrade.bin
```
Type Enter to proceed. The router will erase the old firmware and write the new one.

Signed-off-by: Jianyu Zhuang <xzjianyu@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17172
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>