On Fri, Jan 17, 2014 at 05:15:49PM +0100, Matthieu CASTET wrote:
> Le Fri, 17 Jan 2014 16:54:07 +0100,
> Michael Grzeschik <mgr@xxxxxxxxxxxxxx> a écrit :
>
> > Hi Peter,
> >
> > we recently see a lot of warnings with the chipidea udc.
> > The driver is running as g_ether gadget.
> >
> > cat drivers/usb/chipidea/udc.c
> > ...
> >
> > if (i != 0) {
> > dev_warn(ci->dev, "ctrl traffic at endpoint %d\n", i);
> > continue;
> > }
> > ...
> >
> >
> > Do you know if this condition is correct anyway? It checks
> > for fifonumbers different to zero. As I know fifo zero is
> > ep0out. The core has the ep0in fifo on position 8, that
> > should also handle ctrl traffic IMHO.
> >
> How many fifo have your controller (hw_ep_max) ?
It's MX28. For this hw_ep_max is 16.
> When you say fifo on position 8, you mean in software (in ci_hw_ep
> array), but not in hardware (ENDPTCTRLx) ?
Yes. In the code "i" is the index of the hwep array. AFAIK the array is
organized like this;
i == [0:7] out endpoints
i == [8:15] in endpoints.
Therefor index 0 is ep0out and index 8 is ep0in.
Thanks,
Michael
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