static void uhid_write_callback(struct usb_xfer *xfer, usb_error_t error) { struct uhid_softc *sc = usbd_xfer_softc(xfer); struct usb_device_request req; struct usb_page_cache *pc; uint32_t size = sc->sc_osize; uint32_t actlen; uint8_t id; switch (USB_GET_STATE(xfer)) { case USB_ST_TRANSFERRED: case USB_ST_SETUP: /* try to extract the ID byte */ if (sc->sc_oid) { pc = usbd_xfer_get_frame(xfer, 0); if (usb_fifo_get_data(sc->sc_fifo.fp[USB_FIFO_TX], pc, 0, 1, &actlen, 0)) { if (actlen != 1) { goto tr_error; } usbd_copy_out(pc, 0, &id, 1); } else { return; } if (size) { size--; } } else { id = 0; } pc = usbd_xfer_get_frame(xfer, 1); if (usb_fifo_get_data(sc->sc_fifo.fp[USB_FIFO_TX], pc, 0, UHID_BSIZE, &actlen, 1)) { if (actlen != size) { goto tr_error; } uhid_fill_set_report (&req, sc->sc_iface_no, UHID_OUTPUT_REPORT, id, size); pc = usbd_xfer_get_frame(xfer, 0); usbd_copy_in(pc, 0, &req, sizeof(req)); usbd_xfer_set_frame_len(xfer, 0, sizeof(req)); usbd_xfer_set_frame_len(xfer, 1, size); usbd_xfer_set_frames(xfer, size ? 2 : 1); usbd_transfer_submit(xfer); } return; default: tr_error: /* bomb out */ usb_fifo_get_data_error(sc->sc_fifo.fp[USB_FIFO_TX]); return; } }
static void ugen_start_write(struct usb_fifo *f) { /* check that pipes are open */ if (ugen_open_pipe_write(f)) { /* signal error */ usb_fifo_get_data_error(f); } /* start transfers */ usbd_transfer_start(f->xfer[0]); usbd_transfer_start(f->xfer[1]); }