Interest in support for Mediatek/Ralink SoCs?

[Ganbold Tsagaankhuu]

Stanislav,

On Fri, Dec 11, 2015 at 4:25 PM, Stanislav Galabov <sgalabov at gmail.com>
wrote:

> Hi all,
>
> Is there any interest on bringing support for Ralink/Mediatek more
> up-to-date SoCs, such as MT7620, MT7628, MT7688 and, notably, MT7621 to
> FreeBSD?
>
> The first three are pretty standard in terms of CPU - they’re all MIPS
> 24Kc based, so they should ‘just work’ as far as booting FreeBSD goes.
> The last one and, in my opinion, the most interesting one, the MT7621 is a
> MIPS 1004Kc - dual core with dual hardware threads per core. It also
> introduces new (to FreeBSD/mips) concepts such as the global interrupt
> controller (gic) for example and could be interesting from this perspective
> as well as it could pave the way for MIPS 1074K support as well.
>
> I am currently able to boot MT7621 single core to multi user. I can start
> the rest of the cores and threads as well, but am still having difficulties
> figuring out the proper cache and TLB management so it basically doesn’t
> support SMP at the moment.
>
> I have also done some work on PCI support for the MT7621 and am currently
> using userland on a SATA drive, connected to an ASMedia 1061 on the PCI
> bus, which seems to be quite stable as well, although the code is nowhere
> near ready to show to other people :-)
>

Very nice.



>
> The support for all the peripherals, however, is not something I would be
> able to take on all by myself, due to lack of spare time.
> There is some support in the tree for older Ralink systems (in
> sys/mips/rt305x and in sys/dev/rt for the ethernet/switch peripheral), but
> it needs work.
> Also, the WiFi drivers do not seem to support the chipsets embedded in or
> used with MT76xx, so this will be a major challenge it seems, especially
> given the lack of documentation… however, a piece of good news is that
> OpenWRT supports most/all of these chipsets, so at least we would have a
> frame of reference…
>
> So, anyone else interested in working on MT76xx support?
>

I think some developers in this list already have MT7621 board so maybe
they have some interest and can test your changes.

Ganbold



>
> Best wishes,
> Stanislav
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