On Tue, Nov 22, 2011 at 7:48 PM, Peter Chen [off-list ref] wrote:

quoted

quoted

It seems to can't get the correct qh pointer, you may still need to use
below code to get it
=A0 =A0 =A0 int i =3D ep_index(ep) * 2 + ep_is_in(ep);
=A0 =A0 =A0 struct ep_queue_head *dQH =3D &ep->udc->ep_qh[i];

Thanks for trying. =A0 =A0It will be much easier if we can dereference Q=

H from the ep structure. =A0It is really strange that the ep->qh pointer is=
 not working somehow.

quoted

Seems only ep0-out's qh pointer is assigned at ep structure.
At probe:
/* setup udc->eps[] for ep0 */
struct_ep_setup(udc_controller, 0, "ep0", 0);

quoted

We have initialized it in struct_ep_setup():
=A0 =A0 =A0 =A0ep->qh =3D &udc->ep_qh[index];

Can you do me a favor on investigating why it's failing?

Leo, I have debugged this issue at my board just now, the reason of failure
is we only have one ep struct for ep0, so when talking about ep0, it always
pointers to udc->ep[0]. So even we initialize the current qh address for ep=
0in
at probe, it still can't get the ep0in's qh address through ep
structure, as ep0 is
always udc->ep[0].

quoted

Thanks,
Leo

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--
BR,
Peter Chen

--=20
BR,
Peter Chen