On Wed, 2016-01-27 at 11:33 +0530, Muni Sekhar wrote:
> [ Please keep me in CC as I'm not subscribed to the list]
>
> Hello,
>
> My test system is having two USB1.1 (OHCI) controllers and one USB2
> (EHCI) controller.
>
> I am assuming When a High-Speed device is connected to the port, the
> EHCI takes care of it. If the device is Full-Speed or Low-Speed, the
> EHCI is disconnected from the port and the UHCI/OHCI is connected
> instead. But I noticed a different behaviour i.e. when I connect
> Full-Speed device(CSR’s Bluetooth device using btusb.ko driver) it is
> ending up at an EHCI controller instead of OHCI controller, any
> explanation?
You are using a hub. In that case TTs in the hub are used. The switch
to OHCI would happen only if you went directly to the HC.
HTH
Oliver
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