ramips: add support for Xiaomi Mi Router 4AC (100M Edition)

[Sorin Pop]

The difference is the size of the overlay and partition table and the
uboot that is used on the devices.

xiaomi_mir4a-100m uses bc160000 as entry point
and
xiaomi_mir4ac-100m uses bc260000 as entry point

from what I have seen mir4a is a CN version of MIR4AC which is EU.

On Sun, Dec 6, 2020 at 2:38 AM Adrian Schmutzler
<mail at adrianschmutzler.de> wrote:
>
> > -----Original Message-----
> > From: openwrt-devel [mailto:openwrt-devel-bounces at lists.openwrt.org]
> > On Behalf Of Sorin Pop
> > Sent: Sonntag, 6. Dezember 2020 00:54
> > To: openwrt-devel at lists.openwrt.org
> > Subject: ramips: add support for Xiaomi Mi Router 4AC (100M Edition)
> >
> > - SoC:      MediaTek MT7628AN
> > - Flash:    16MB (Winbond W25Q128JV)
> > - RAM:      64MB
> > - Serial:   As marked on PCB, 3V3 logic, baudrate is 115200
> > - Ethernet: 3x 10/100 Mbps (switched, 2x LAN + WAN)
> > - WIFI0:    MT7628AN 2.4GHz 802.11b/g/n
> > - WIFI1:    MT7612EN 5GHz 802.11ac
> > - Antennas: 4x external (2 per radio), non-detachable
> > - LEDs:     Programmable power-LED (two-colored, yellow/blue)
> >             Non-programmable internet-LED (shows WAN-activity)
> > - Buttons:  Reset
>
> So, the only difference in implementation is the size of overlay/firmware partitions?
>
> Best
>
> Adrian
>
> >
> > INSTALLATION:
> >
> > 1. Connect to the serial port of the router and power it up.
> >    If you get a prompt asking for boot-mode, go to step 3.
> > 2. Unplug the router after
> >        > Erasing SPI Flash...
> >        > raspi_erase: offs:20000 len:10000
> >    occurs on the serial port. Plug the router back in.
> > 3. At the prompt select option 2 (Load system code then
> >    write to Flash via TFTP.)
> > 4. Enter 192.168.1.1 as the device IP and 192.168.1.2 as the
> >    Server-IP.
> > 5. Connect your computer to LAN1 and assign it as 192.168.1.2/24.
> > 6. Serve the sysupgrade image via TFTP
> >
> > This router seems to have the same hardware as Xiaomi Mi Router 4A (100M
> > Edition) but it uses a different U-Boot.
> >
> > Signed-off-by: Sorin Pop <alexsorinpop at gmail.com>



-- 
Sorin Alexandru Pop
Tel: +40-723-346437