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Paul Fertser 522d5ff428 ramips: add support for Xiaomi Mi Wi-Fi Router 3G v2
- CMIIT ID: 2019AP2581
- SoC:      MediaTek MT7621
- Flash:    16MiB NOR SPI (GigaDevice GD25Q128B)
- RAM:      128MiB DDR3 (ESMT M15T1G1664A)
- Serial:   As marked on PCB, 3V3 logic, baudrate is 115200, 8n1
- Ethernet: 3x 10/100/1000 Mbps (switched, 2xLAN + WAN)
- WIFI0:    MT7603E 2.4GHz 802.11b/g/n
- WIFI1:    MT7612E 5GHz 802.11ac
- Antennas: 4x external (2 per radio), non-detachable
- LEDs:     Programmable "power" LED (two-coloured, yellow/blue)
            Non-programmable "internet" LED (shows WAN activity)
- Buttons:  Reset

INSTALLATION:

Bootloader won't accept any serial input unless "boot_wait" u-boot
environment variable is changed to "on". Vendor firmware (looks like
an illegal OpenWrt fork) won't accept any serial input unless
"uart_en" is set to "1". Tricks to force u-boot to use default
environment do not help as it's restricted in the same way.

With bootloader unlocked the easiest way would be to TFTP the
sysupgrade image or to sysupgrade after loading an initramfs one.

For porting the flash contents were changed externally with an SPI
programmer (after lifting Vcc flash IC pin away from the PCB).

Forum thread [0] indicates that this device is identical to "Xiaomi Mi
Router 4A Gigabit Edition".

[0] https://forum.openwrt.org/t/xiaomi-mi-router-4a-gigabit-edition-r4ag-r4a-gigabit-fully-supported-but-requires-overwriting-spi-flash-with-programmer/36685

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
5 years ago
..
lzma-loader ramips: Add support for mt7621 to lzma-loader 6 years ago
Makefile ramips: move "elx-header" to Makefile from mt7620.mk and mt7621.mk 5 years ago
mt76x8.mk ramips: fix TARGET_DEVICES after UniElec rename 5 years ago
mt7620.mk treewide: remove kmod-usb-core from DEVICE_PACKAGES 5 years ago
mt7621.mk ramips: add support for Xiaomi Mi Wi-Fi Router 3G v2 5 years ago
rt288x.mk treewide: remove kmod-usb-core from DEVICE_PACKAGES 5 years ago
rt305x.mk treewide: remove kmod-usb-core from DEVICE_PACKAGES 5 years ago
rt3883.mk treewide: remove kmod-usb-core from DEVICE_PACKAGES 5 years ago