Hi Alan and Sarah,
I confirmed that simply calling usb_set_altinterface (which via libusb
calls the kernel function usb_set_interface) does correctly clear the
toggle bits for USB2 or sequence number for USB3 on an XHCI host
controller, even when the alternate interface setting is the same as
the
On Mon, 15 Oct 2012, Sarah Sharp wrote:
> I double checked, and calling usb_set_interface for the same alternate
> setting that is currently installed will cause the xHCI driver to drop
> and re-add the current endpoints. This should cause the toggle to be
> reset for the endpoints.
>
> I suppos
On Sat, Oct 13, 2012 at 12:18:57PM -0400, Alan Stern wrote:
> On Fri, 12 Oct 2012, Yuliya T wrote:
>
> > Hi Alan,
> >
> > Thank you for the suggestion. We independently ended up with the same
> > workaround, but still weren't happy with it. The problem is we don't
> > want to relinquish access
On Fri, 12 Oct 2012, Yuliya T wrote:
> Hi Alan,
>
> Thank you for the suggestion. We independently ended up with the same
> workaround, but still weren't happy with it. The problem is we don't
> want to relinquish access to the device, but to do set-interface, you
> have to do release interface
Hi Alan,
Thank you for the suggestion. We independently ended up with the same
workaround, but still weren't happy with it. The problem is we don't
want to relinquish access to the device, but to do set-interface, you
have to do release interface, and t's a little strange that you are
releasing
On Tue, 2 Oct 2012, Yuliya T wrote:
> Our device goes through a software-directed firmware reset which
> clears the device-side toggle bits (or sequence numbers). The
> endpoint is not halted though. Therefore, we want a clean way to
> reset the toggle bits (or sequence numbers) on the host with
Hi Sarah,
>> 2. Clear Halt of EP
>
> Also note that the xHCI hardware will only allow the Reset Endpoint to
> complete if the endpoint was actually halted due to a stall, babble,
> transfer error, etc. It won't reset the endpoint toggles or sequence
> number at arbitrary points, so we can't reset
