Thanx, for writing to device got it, in gmidi_complete function i successfully received the input 16-byte buffer . this buffer enter device via endpoint 01 OUT. now i have to read from device via endpoint 81. so sequence is: BULK_WRITE to endpoint 01 with buffer 16 bytes BULK_READ to endpoint 81 with buffer 16 bytes - getting back device answer. in "complete" function i see only req->ep01_out call, for 01 call i just setting req->status=OK and issuing the usb_ep_queue() again to indicate status of wrting ok bute where to catch catch req->ep81_in ? i dont see call of "complete" function when hcd sends this request to device. >Michal Nazarewicz <mina86@...> writes: > > On Wed, 27 Apr 2011 22:04:24 +0200, baseplast <baseplast@...> wrote: > > i looked inside gadget.h and found declaration usb_ep_queue > > --- > > usb_ep_queue(struct usb_ep *ep, struct usb_request *req, gfp_tgfp_flags) > > --- > > but i dint find any call for it in zero.c > > however, i found it called inside gmidi.c that is close to my project. > > as i realized, each time HCD sends request to my device, gmidi_setup > > routine is called. But this routine related only to ep0 control > > requests. > > Yes, the setup callback is called for control requests only (my > terminology may be wrong here). > > > After creation of device, i made myendpoints enabled with > > err = usb_ep_enable(dev->in_ep, &bulk_in_desc); > > err = usb_ep_enable(dev->out_ep, &bulk_out_desc); > > > > ep = dev->out_ep; > > req = alloc_ep_req(ep, buflen); > > > > then i calling the > > err = usb_ep_queue(ep, req, GFP_ATOMIC); > > > > am i right ? > > > > in what handler do i need to call from in/out endpoints to > > receive/send BULK data? > > struct usb_request has a complete callback which you need to > set which is called when the request is finished (for OUT > endpoints that means data is available, for IN endpoints > data has been sent to host), cancelled or failed. > > Also, if you want to send data you must fill the buffer before > calling usb_ep_queue(). > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
