On Tue, 26 Apr 2011, baseplast wrote:
> Hi!
>
> Please, advice, how can i handle the request USB_ENDPOINT_XFER_BULK
> inside client's API.
> i'm unsing dummy_hcd.ko module at debian 6 kernel 2.6.32.
>
> I correclty handling ad gadget side the control requests, using
>
> usb_gadget_driver
> .setup function
>
> it handles control request only with setup packets.
> my gadget device uses USB_ENDPOINT_XFER_BULK for ep1 and ep81.
>
> at dummy_hcd.c code i found only
>
> /* non-control requests */
> limit = total;
> switch (usb_pipetype (urb->pipe)) {
> case PIPE_ISOCHRONOUS:
> /* FIXME is it urb->interval since the last xfer?
> * use urb->iso_frame_desc[i].
> * complete whether or not ep has requests queued.
> * report random errors, to debug drivers.
> */
> limit = max (limit, periodic_bytes (dum, ep));
> status = -ENOSYS;
> break;
>
> case PIPE_INTERRUPT:
> /* FIXME is it urb->interval since the last xfer?
> * this almost certainly polls too fast.
> */
> limit = max (limit, periodic_bytes (dum, ep));
> /* FALLTHROUGH */
>
> // case PIPE_BULK: case PIPE_CONTROL:
> default:
> treat_control_like_bulk:
> ep->last_io = jiffies;
> total = transfer(dum, urb, ep, limit, &status);
> break;
> }
>
> =======================================================================
> any device's side way to receive and emulate such requests?
Read include/linux/usb/gadget.h. You need to use usb_ep_queue().
See drivers/usb/gadget/zero.c for an example of how to use bulk
endpoints.
Alan Stern
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