[haiku-bugs] Re: [Haiku] #8954: USB3 support
- From: "akshay1994" <trac@xxxxxxxxxxxx>
- Date: Thu, 10 Jul 2014 10:30:46 -0000
#8954: USB3 support
---------------------------+----------------------------
Reporter: dsjonny | Owner: korli
Type: enhancement | Status: assigned
Priority: high | Milestone: Unscheduled
Component: Drivers/USB | Version: R1/Development
Resolution: | Keywords: usb3
Blocked By: | Blocking: 7665, 10750
Has a Patch: 1 | Platform: All
---------------------------+----------------------------
Comment (by akshay1994):
Replying to [comment:25 korli]:
> I checked without and with the patch on the Intel Lynx Point. Both cases
work (no lock on init), but the ports are still routed to the EHCI
controller. I'll try to enable routing
Yes. But earlier it was checking the wrong extended capability register.
For jessicah's case, the USB Legacy Support capability register was
located at 0x8460, but it was looking at 0x8480 and wrongly believing that
the controller is BIOS owned.
> It doesn't work on the Nec controller but doesn't crash either.
>
> I wonder why hub support is needed. Hubs are discovered by explore
thread in USB manager, and HubDevice are allocated there. Could you
explain a bit?
The explore thread calls GetBusManager()->AllocateDevice(), which in turn
checks whether the newly connected device is a hub or a function.
AllocateDevice() was made virtual in
https://github.com/haiku/haiku/commit/319a3798bc05579e8be813c2524bc89864bae489,
and we (re)implement it for XHCI. As a result, Hubs were getting allocated
as devices. Also, we need to initialise the slot context accordingly for
hubs.
P.S. -> Yes, routing needs to be enabled for both, Panther Point and Lynx
Point. I can look into this, if you are busy!
--
Ticket URL: <https://dev.haiku-os.org/ticket/8954#comment:26>
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