Date: Fri, 11 Dec 2015 10:25:32 +0200 From: Stanislav Galabov <sgalabov@gmail.com> To: freebsd-mips@freebsd.org Subject: Interest in support for Mediatek/Ralink SoCs? Message-ID: <F35AF02A-DC31-4B5F-9349-26C2FF47F5C2@gmail.com>
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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=E2=80=99re = all MIPS 24Kc based, so they should =E2=80=98just work=E2=80=99 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=E2=80=99t 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 :-) 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=E2=80=A6 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=E2=80=A6 So, anyone else interested in working on MT76xx support? Best wishes, Stanislav=
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