diff --git a/sys/dev/usb/ehci.c b/sys/dev/usb/ehci.c
index c0363c8f414f..89db9531fe32 100644
--- a/sys/dev/usb/ehci.c
+++ b/sys/dev/usb/ehci.c
@@ -476,8 +476,8 @@ ehci_init(ehci_softc_t *sc)
 	sc->sc_async_head = sqh;
 	EOWRITE4(sc, EHCI_ASYNCLISTADDR, sqh->physaddr | EHCI_LINK_QH);
 
-	usb_callout_init(sc->sc_tmo_pcd);
-	usb_callout_init(sc->sc_tmo_intrlist);
+	callout_init(&sc->sc_tmo_pcd, 0);
+	callout_init(&sc->sc_tmo_intrlist, 0);
 
 	lockinit(&sc->sc_doorbell_lock, PZERO, "ehcidb", 0, 0);
 
@@ -594,7 +594,7 @@ ehci_intr1(ehci_softc_t *sc)
 		 */
 		ehci_pcd_able(sc, 0);
 		/* Do not allow RHSC interrupts > 1 per second */
-                usb_callout(sc->sc_tmo_pcd, hz, ehci_pcd_enable, sc);
+                callout_reset(&sc->sc_tmo_pcd, hz, ehci_pcd_enable, sc);
 		eintrs &= ~EHCI_STS_PCD;
 	}
 
@@ -684,8 +684,8 @@ ehci_softintr(void *v)
 	/* Schedule a callout to catch any dropped transactions. */
 	if ((sc->sc_flags & EHCI_SCFLG_LOSTINTRBUG) &&
 	    !LIST_EMPTY(&sc->sc_intrhead))
-		usb_callout(sc->sc_tmo_intrlist, hz / 5, ehci_intrlist_timeout,
-		   sc);
+		callout_reset(&sc->sc_tmo_intrlist, hz / 5,
+		    ehci_intrlist_timeout, sc);
 
 #ifdef USB_USE_SOFTINTR
 	if (sc->sc_softwake) {
@@ -742,7 +742,7 @@ ehci_check_intr(ehci_softc_t *sc, struct ehci_xfer *ex)
 	}
  done:
 	DPRINTFN(12, ("ehci_check_intr: ex=%p done\n", ex));
-	usb_uncallout(ex->xfer.timeout_handle, ehci_timeout, ex);
+	callout_stop(&ex->xfer.timeout_handle);
 	usb_rem_task(ex->xfer.pipe->device, &ex->abort_task);
 	ehci_idone(ex);
 }
@@ -929,8 +929,8 @@ ehci_detach(struct ehci_softc *sc, int flags)
 	EOWRITE4(sc, EHCI_USBINTR, sc->sc_eintrs);
 	EOWRITE4(sc, EHCI_USBCMD, 0);
 	EOWRITE4(sc, EHCI_USBCMD, EHCI_CMD_HCRESET);
-	usb_uncallout(sc->sc_tmo_intrlist, ehci_intrlist_timeout, sc);
-	usb_uncallout(sc->sc_tmo_pcd, ehci_pcd_enable, sc);
+	callout_stop(&sc->sc_tmo_intrlist);
+	callout_stop(&sc->sc_tmo_pcd);
 
 #if defined(__NetBSD__) || defined(__OpenBSD__)
 	if (sc->sc_powerhook != NULL)
@@ -969,9 +969,7 @@ ehci_power(int why, void *v)
 	s = splhardusb();
 	switch (why) {
 	case PWR_SUSPEND:
-#if defined(__NetBSD__) || defined(__OpenBSD__)
 	case PWR_STANDBY:
-#endif
 		sc->sc_bus.use_polling++;
 
 		for (i = 1; i <= sc->sc_noport; i++) {
@@ -1069,12 +1067,10 @@ ehci_power(int why, void *v)
 
 		sc->sc_bus.use_polling--;
 		break;
-#if defined(__NetBSD__) || defined(__OpenBSD__)
 	case PWR_SOFTSUSPEND:
 	case PWR_SOFTSTANDBY:
 	case PWR_SOFTRESUME:
 		break;
-#endif
 	}
 	splx(s);
 
@@ -2523,7 +2519,7 @@ ehci_abort_xfer(usbd_xfer_handle xfer, usbd_status status)
 		/* If we're dying, just do the software part. */
 		s = splusb();
 		xfer->status = status;	/* make software ignore it */
-		usb_uncallout(xfer->timeout_handle, ehci_timeout, xfer);
+		callout_stop(&xfer->timeout_handle);
 		usb_rem_task(epipe->pipe.device, &exfer->abort_task);
 		usb_transfer_complete(xfer);
 		splx(s);
@@ -2557,7 +2553,7 @@ ehci_abort_xfer(usbd_xfer_handle xfer, usbd_status status)
 	s = splusb();
 	exfer->ehci_xfer_flags |= EHCI_XFER_ABORTING;
 	xfer->status = status;	/* make software ignore it */
-	usb_uncallout(xfer->timeout_handle, ehci_timeout, xfer);
+	callout_stop(&xfer->timeout_handle);
 	usb_rem_task(epipe->pipe.device, &exfer->abort_task);
 	splx(s);
 
@@ -2932,8 +2928,8 @@ ehci_device_request(usbd_xfer_handle xfer)
 	s = splusb();
 	ehci_activate_qh(sqh, setup);
 	if (xfer->timeout && !sc->sc_bus.use_polling) {
-                usb_callout(xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
-			    ehci_timeout, xfer);
+                callout_reset(&xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
+		    ehci_timeout, xfer);
 	}
 	ehci_add_intr_list(sc, exfer);
 	xfer->status = USBD_IN_PROGRESS;
@@ -3059,8 +3055,8 @@ ehci_device_bulk_start(usbd_xfer_handle xfer)
 	s = splusb();
 	ehci_activate_qh(sqh, data);
 	if (xfer->timeout && !sc->sc_bus.use_polling) {
-		usb_callout(xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
-			    ehci_timeout, xfer);
+		callout_reset(&xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
+		    ehci_timeout, xfer);
 	}
 	ehci_add_intr_list(sc, exfer);
 	xfer->status = USBD_IN_PROGRESS;
@@ -3244,7 +3240,7 @@ ehci_device_intr_start(usbd_xfer_handle xfer)
 	s = splusb();
 	ehci_activate_qh(sqh, data);
 	if (xfer->timeout && !sc->sc_bus.use_polling) {
-		usb_callout(xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
+		callout_reset(&xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
 		    ehci_timeout, xfer);
 	}
 	ehci_add_intr_list(sc, exfer);
@@ -3354,7 +3350,7 @@ ehci_device_intr_done(usbd_xfer_handle xfer)
 		s = splusb();
 		ehci_activate_qh(sqh, data);
 		if (xfer->timeout && !sc->sc_bus.use_polling) {
-			usb_callout(xfer->timeout_handle,
+			callout_reset(&xfer->timeout_handle,
 			    MS_TO_TICKS(xfer->timeout), ehci_timeout, xfer);
 		}
 		splx(s);
diff --git a/sys/dev/usb/ehcivar.h b/sys/dev/usb/ehcivar.h
index d93b8a84561f..7b2284538021 100644
--- a/sys/dev/usb/ehcivar.h
+++ b/sys/dev/usb/ehcivar.h
@@ -154,12 +154,9 @@ typedef struct ehci_softc {
 
 	struct lock sc_doorbell_lock;
 
-	usb_callout_t sc_tmo_pcd;
-	usb_callout_t sc_tmo_intrlist;
+	struct callout sc_tmo_pcd;
+	struct callout sc_tmo_intrlist;
 
-#if defined(__NetBSD__) || defined(__OpenBSD__)
-	device_t sc_child;		/* /dev/usb# device */
-#endif
 	char sc_dying;
 #if defined(__NetBSD__)
 	struct usb_dma_reserve sc_dma_reserve;
diff --git a/sys/dev/usb/ohci.c b/sys/dev/usb/ohci.c
index 293f42d973f3..40836e780577 100644
--- a/sys/dev/usb/ohci.c
+++ b/sys/dev/usb/ohci.c
@@ -338,7 +338,7 @@ ohci_detach(struct ohci_softc *sc, int flags)
 	int i, rv = 0;
 
 	sc->sc_dying = 1;
-	usb_uncallout(sc->sc_tmo_rhsc, ohci_rhsc_enable, sc);
+	callout_stop(&sc->sc_tmo_rhsc);
 
 #if defined(__NetBSD__) || defined(__OpenBSD__)
 	powerhook_disestablish(sc->sc_powerhook);
@@ -793,7 +793,7 @@ ohci_init(ohci_softc_t *sc)
 	sc->sc_shutdownhook = shutdownhook_establish(ohci_shutdown, sc);
 #endif
 
-	usb_callout_init(sc->sc_tmo_rhsc);
+	callout_init(&sc->sc_tmo_rhsc, 0);
 
 	return (USBD_NORMAL_COMPLETION);
 
@@ -1212,7 +1212,7 @@ ohci_intr1(ohci_softc_t *sc)
 		 */
 		ohci_rhsc_able(sc, 0);
 		/* Do not allow RHSC interrupts > 1 per second */
-		usb_callout(sc->sc_tmo_rhsc, hz, ohci_rhsc_enable, sc);
+		callout_reset(&sc->sc_tmo_rhsc, hz, ohci_rhsc_enable, sc);
 		eintrs &= ~OHCI_RHSC;
 	}
 
@@ -1384,7 +1384,7 @@ ohci_softintr(void *v)
 			DPRINTFN(15,("ohci_process_done: error cc=%d (%s)\n",
 			  OHCI_TD_GET_CC(le32toh(std->td.td_flags)),
 			  ohci_cc_strs[OHCI_TD_GET_CC(le32toh(std->td.td_flags))]));
-			usb_uncallout(xfer->timeout_handle, ohci_timeout, xfer);
+			callout_stop(&xfer->timeout_handle);
 			usb_rem_task(OXFER(xfer)->xfer.pipe->device,
 			    &OXFER(xfer)->abort_task);
 
@@ -1424,7 +1424,7 @@ ohci_softintr(void *v)
 			continue;
 
 		/* Normal transfer completion */
-		usb_uncallout(xfer->timeout_handle, ohci_timeout, xfer);
+		callout_stop(&xfer->timeout_handle);
 		usb_rem_task(OXFER(xfer)->xfer.pipe->device,
 		    &OXFER(xfer)->abort_task);
 		for (p = xfer->hcpriv; p->xfer == xfer; p = n) {
@@ -1753,8 +1753,8 @@ ohci_device_request(usbd_xfer_handle xfer)
 	opipe->tail.td = tail;
 	OWRITE4(sc, OHCI_COMMAND_STATUS, OHCI_CLF);
 	if (xfer->timeout && !sc->sc_bus.use_polling) {
-		usb_callout(xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
-			    ohci_timeout, xfer);
+		callout_reset(&xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
+		    ohci_timeout, xfer);
 	}
 	splx(s);
 
@@ -2211,7 +2211,7 @@ ohci_abort_xfer(usbd_xfer_handle xfer, usbd_status status)
 		/* If we're dying, just do the software part. */
 		s = splusb();
 		xfer->status = status;	/* make software ignore it */
-		usb_uncallout(xfer->timeout_handle, ohci_timeout, xfer);
+		callout_stop(&xfer->timeout_handle);
 		usb_rem_task(xfer->pipe->device, &OXFER(xfer)->abort_task);
 		usb_transfer_complete(xfer);
 		splx(s);
@@ -2245,7 +2245,7 @@ ohci_abort_xfer(usbd_xfer_handle xfer, usbd_status status)
 	s = splusb();
 	oxfer->ohci_xfer_flags |= OHCI_XFER_ABORTING;
 	xfer->status = status;	/* make software ignore it */
-	usb_uncallout(xfer->timeout_handle, ohci_timeout, xfer);
+	callout_stop(&xfer->timeout_handle);
 	usb_rem_task(xfer->pipe->device, &OXFER(xfer)->abort_task);
 	splx(s);
 	DPRINTFN(1,("ohci_abort_xfer: stop ed=%p\n", sed));
@@ -2967,8 +2967,8 @@ ohci_device_bulk_start(usbd_xfer_handle xfer)
 	sed->ed.ed_flags &= htole32(~OHCI_ED_SKIP);
 	OWRITE4(sc, OHCI_COMMAND_STATUS, OHCI_BLF);
 	if (xfer->timeout && !sc->sc_bus.use_polling) {
-                usb_callout(xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
-			    ohci_timeout, xfer);
+                callout_reset(&xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
+		    ohci_timeout, xfer);
 	}
 
 #if 0
diff --git a/sys/dev/usb/ohcivar.h b/sys/dev/usb/ohcivar.h
index 23855f4a9add..48f99e769f4c 100644
--- a/sys/dev/usb/ohcivar.h
+++ b/sys/dev/usb/ohcivar.h
@@ -142,7 +142,7 @@ typedef struct ohci_softc {
 	u_int sc_overrun_cnt;
 	struct timeval sc_overrun_ntc;
 
-	usb_callout_t sc_tmo_rhsc;
+	struct callout sc_tmo_rhsc;
 	char sc_dying;
 } ohci_softc_t;
 
diff --git a/sys/dev/usb/uhci.c b/sys/dev/usb/uhci.c
index 8b84c2720635..4d4c61bf65c9 100644
--- a/sys/dev/usb/uhci.c
+++ b/sys/dev/usb/uhci.c
@@ -507,7 +507,7 @@ uhci_init(uhci_softc_t *sc)
 
 	STAILQ_INIT(&sc->sc_free_xfers);
 
-	usb_callout_init(sc->sc_poll_handle);
+	callout_init(&sc->sc_poll_handle, 0);
 
 	/* Set up the bus struct. */
 	sc->sc_bus.methods = &uhci_bus_methods;
@@ -661,8 +661,7 @@ uhci_power(int why, void *v)
 			uhci_dumpregs(sc);
 #endif
 		if (sc->sc_intr_xfer != NULL)
-			usb_uncallout(sc->sc_poll_handle, uhci_poll_hub,
-			    sc->sc_intr_xfer);
+			callout_stop(&sc->sc_poll_handle);
 		sc->sc_bus.use_polling++;
 		uhci_run(sc, 0); /* stop the controller */
 		cmd &= ~UHCI_CMD_RS;
@@ -709,8 +708,8 @@ uhci_power(int why, void *v)
 		usb_delay_ms(&sc->sc_bus, USB_RESUME_RECOVERY);
 		sc->sc_bus.use_polling--;
 		if (sc->sc_intr_xfer != NULL)
-			usb_callout(sc->sc_poll_handle, sc->sc_ival,
-				    uhci_poll_hub, sc->sc_intr_xfer);
+			callout_reset(&sc->sc_poll_handle, sc->sc_ival,
+			    uhci_poll_hub, sc->sc_intr_xfer);
 #ifdef USB_DEBUG
 		if (uhcidebug > 2)
 			uhci_dumpregs(sc);
@@ -924,7 +923,7 @@ uhci_poll_hub(void *addr)
 
 	DPRINTFN(20, ("uhci_poll_hub\n"));
 
-	usb_callout(sc->sc_poll_handle, sc->sc_ival, uhci_poll_hub, xfer);
+	callout_reset(&sc->sc_poll_handle, sc->sc_ival, uhci_poll_hub, xfer);
 
 	p = xfer->buffer;
 	p[0] = 0;
@@ -1320,7 +1319,7 @@ uhci_check_intr(uhci_softc_t *sc, uhci_intr_info_t *ii)
 	}
  done:
 	DPRINTFN(12, ("uhci_check_intr: ii=%p done\n", ii));
-	usb_uncallout(ii->xfer->timeout_handle, uhci_timeout, ii);
+	callout_stop(&ii->xfer->timeout_handle);
 	usb_rem_task(ii->xfer->pipe->device, &UXFER(ii->xfer)->abort_task);
 	uhci_idone(ii);
 }
@@ -1941,7 +1940,7 @@ uhci_device_bulk_start(usbd_xfer_handle xfer)
 	uhci_add_intr_info(sc, ii);
 
 	if (xfer->timeout && !sc->sc_bus.use_polling) {
-		usb_callout(xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
+		callout_reset(&xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
 			    uhci_timeout, ii);
 	}
 	xfer->status = USBD_IN_PROGRESS;
@@ -1994,7 +1993,7 @@ uhci_abort_xfer(usbd_xfer_handle xfer, usbd_status status)
 		/* If we're dying, just do the software part. */
 		s = splusb();
 		xfer->status = status;	/* make software ignore it */
-		usb_uncallout(xfer->timeout_handle, uhci_timeout, xfer);
+		callout_stop(&xfer->timeout_handle);
 		usb_rem_task(xfer->pipe->device, &UXFER(xfer)->abort_task);
 		uhci_transfer_complete(xfer);
 		splx(s);
@@ -2028,7 +2027,7 @@ uhci_abort_xfer(usbd_xfer_handle xfer, usbd_status status)
 	s = splusb();
 	uxfer->uhci_xfer_flags |= UHCI_XFER_ABORTING;
 	xfer->status = status;	/* make software ignore it */
-	usb_uncallout(xfer->timeout_handle, uhci_timeout, ii);
+	callout_stop(&xfer->timeout_handle);
 	usb_rem_task(xfer->pipe->device, &UXFER(xfer)->abort_task);
 	DPRINTFN(1,("uhci_abort_xfer: stop ii=%p\n", ii));
 	for (std = ii->stdstart; std != NULL; std = std->link.std)
@@ -2432,7 +2431,7 @@ uhci_device_request(usbd_xfer_handle xfer)
 	}
 #endif
 	if (xfer->timeout && !sc->sc_bus.use_polling) {
-		usb_callout(xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
+		callout_reset(&xfer->timeout_handle, MS_TO_TICKS(xfer->timeout),
 			    uhci_timeout, ii);
 	}
 	xfer->status = USBD_IN_PROGRESS;
@@ -3643,7 +3642,7 @@ uhci_root_intr_abort(usbd_xfer_handle xfer)
 {
 	uhci_softc_t *sc = (uhci_softc_t *)xfer->pipe->device->bus;
 
-	usb_uncallout(sc->sc_poll_handle, uhci_poll_hub, xfer);
+	callout_stop(&sc->sc_poll_handle);
 	sc->sc_intr_xfer = NULL;
 
 	if (xfer->pipe->intrxfer == xfer) {
@@ -3688,7 +3687,7 @@ uhci_root_intr_start(usbd_xfer_handle xfer)
 		return (USBD_IOERROR);
 
 	sc->sc_ival = MS_TO_TICKS(xfer->pipe->endpoint->edesc->bInterval);
-	usb_callout(sc->sc_poll_handle, sc->sc_ival, uhci_poll_hub, xfer);
+	callout_reset(&sc->sc_poll_handle, sc->sc_ival, uhci_poll_hub, xfer);
 	sc->sc_intr_xfer = xfer;
 	return (USBD_IN_PROGRESS);
 }
@@ -3699,7 +3698,7 @@ uhci_root_intr_close(usbd_pipe_handle pipe)
 {
 	uhci_softc_t *sc = (uhci_softc_t *)pipe->device->bus;
 
-	usb_uncallout(sc->sc_poll_handle, uhci_poll_hub, sc->sc_intr_xfer);
+	callout_stop(&sc->sc_poll_handle);
 	sc->sc_intr_xfer = NULL;
 	DPRINTF(("uhci_root_intr_close\n"));
 }
diff --git a/sys/dev/usb/uhcivar.h b/sys/dev/usb/uhcivar.h
index 9c86d368492c..0df23f186ae7 100644
--- a/sys/dev/usb/uhcivar.h
+++ b/sys/dev/usb/uhcivar.h
@@ -187,7 +187,7 @@ typedef struct uhci_softc {
 	/* Info for the root hub interrupt channel. */
 	int sc_ival;			/* time between root hub intrs */
 	usbd_xfer_handle sc_intr_xfer;	/* root hub interrupt transfer */
-	usb_callout_t sc_poll_handle;
+	struct callout sc_poll_handle;
 
 	char sc_vendor[16];		/* vendor string for root hub */
 	int sc_id_vendor;		/* vendor ID for root hub */
diff --git a/sys/dev/usb/ukbd.c b/sys/dev/usb/ukbd.c
index cbd536b5d0e0..039bb94140ad 100644
--- a/sys/dev/usb/ukbd.c
+++ b/sys/dev/usb/ukbd.c
@@ -340,7 +340,7 @@ typedef struct ukbd_state {
 #define	INTRENABLED	(1 << 0)
 #define	DISCONNECTED	(1 << 1)
 
-	usb_callout_t ks_timeout_handle;
+	struct callout	ks_timeout_handle;
 
 	int		ks_mode;	/* input mode (K_XLATE,K_RAW,K_CODE) */
 	int		ks_flags;	/* flags */
@@ -569,7 +569,7 @@ ukbd_init(int unit, keyboard_t **kbdp, void *arg, int flags)
 		state->ks_iface = uaa->iface;
 		state->ks_uaa = uaa;
 		state->ks_ifstate = 0;
-		usb_callout_init(state->ks_timeout_handle);
+		callout_init(&state->ks_timeout_handle, 0);
 		/*
 		 * FIXME: set the initial value for lock keys in ks_state
 		 * according to the BIOS data?
@@ -639,7 +639,7 @@ ukbd_term(keyboard_t *kbd)
 	state = (ukbd_state_t *)kbd->kb_data;
 	DPRINTF(("ukbd_term: ks_ifstate=0x%x\n", state->ks_ifstate));
 
-	usb_uncallout(state->ks_timeout_handle, ukbd_timeout, kbd);
+	callout_stop(&state->ks_timeout_handle);
 
 	if (state->ks_ifstate & INTRENABLED)
 		ukbd_enable_intr(kbd, FALSE, NULL);
@@ -680,7 +680,7 @@ ukbd_timeout(void *arg)
 	state = (ukbd_state_t *)kbd->kb_data;
 	s = splusb();
 	(*kbdsw[kbd->kb_index]->intr)(kbd, (void *)USBD_NORMAL_COMPLETION);
-	usb_callout(state->ks_timeout_handle, hz / 40, ukbd_timeout, arg);
+	callout_reset(&state->ks_timeout_handle, hz / 40, ukbd_timeout, arg);
 	splx(s);
 }
 
diff --git a/sys/dev/usb/usbdivar.h b/sys/dev/usb/usbdivar.h
index eeb386c6f4b9..95d8e0eff1fe 100644
--- a/sys/dev/usb/usbdivar.h
+++ b/sys/dev/usb/usbdivar.h
@@ -237,7 +237,7 @@ struct usbd_xfer {
 
 	void		       *hcpriv; /* private use by the HC driver */
 
-	usb_callout_t		timeout_handle;
+	struct callout		timeout_handle;
 };
 
 void usbd_init(void);