111 #define EP_FTST(sc, f)	(sc->stat &   (f))  argument
112 #define EP_FSET(sc, f)	(sc->stat |=  (f))  argument
113 #define EP_FRST(sc, f)	(sc->stat &= ~(f))  argument
116 eeprom_rdy(struct ep_softc *sc)  in eeprom_rdy()  argument
120 	for (i = 0; is_eeprom_busy(sc) && i < MAX_EEPROMBUSY; i++)  in eeprom_rdy()
124 		device_printf(sc->dev, "eeprom failed to come ready.\n");  in eeprom_rdy()
136 ep_get_e(struct ep_softc *sc, uint16_t offset, uint16_t *result)  in ep_get_e()  argument
139 	if (eeprom_rdy(sc))  in ep_get_e()
142 	CSR_WRITE_2(sc, EP_W0_EEPROM_COMMAND,  in ep_get_e()
143 	    (EEPROM_CMD_RD << sc->epb.cmd_off) | offset);  in ep_get_e()
145 	if (eeprom_rdy(sc))  in ep_get_e()
148 	(*result) = CSR_READ_2(sc, EP_W0_EEPROM_DATA);  in ep_get_e()
154 ep_get_macaddr(struct ep_softc *sc, u_char *addr)  in ep_get_macaddr()  argument
163 	GO_WINDOW(sc, 0);  in ep_get_macaddr()
165 		error = ep_get_e(sc, i, &result);  in ep_get_macaddr()
176 	struct ep_softc *sc = device_get_softc(dev);  in ep_alloc()  local
182 	sc->iobase = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,  in ep_alloc()
184 	if (!sc->iobase) {  in ep_alloc()
190 	sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);  in ep_alloc()
191 	if (!sc->irq) {  in ep_alloc()
196 	sc->dev = dev;  in ep_alloc()
197 	sc->stat = 0;		/* 16 bit access */  in ep_alloc()
199 	sc->bst = rman_get_bustag(sc->iobase);  in ep_alloc()
200 	sc->bsh = rman_get_bushandle(sc->iobase);  in ep_alloc()
202 	sc->ep_connectors = 0;  in ep_alloc()
203 	sc->ep_connector = 0;  in ep_alloc()
205 	GO_WINDOW(sc, 0);  in ep_alloc()
207 	error = ep_get_e(sc, EEPROM_PROD_ID, &result);  in ep_alloc()
210 	sc->epb.prod_id = result;  in ep_alloc()
212 	error = ep_get_e(sc, EEPROM_RESOURCE_CFG, &result);  in ep_alloc()
215 	sc->epb.res_cfg = result;  in ep_alloc()
224 ep_get_media(struct ep_softc *sc)  in ep_get_media()  argument
228 	GO_WINDOW(sc, 0);  in ep_get_media()
229 	config = CSR_READ_2(sc, EP_W0_CONFIG_CTRL);  in ep_get_media()
231 		sc->ep_connectors |= AUI;  in ep_get_media()
233 		sc->ep_connectors |= BNC;  in ep_get_media()
235 		sc->ep_connectors |= UTP;  in ep_get_media()
237 	if (!(sc->ep_connectors & 7))  in ep_get_media()
239 			device_printf(sc->dev, "no connectors!\n");  in ep_get_media()
246 	sc->ep_connector = CSR_READ_2(sc, EP_W0_ADDRESS_CFG) >> ACF_CONNECTOR_BITS;  in ep_get_media()
252 	struct ep_softc *sc = device_get_softc(dev);  in ep_free()  local
254 	if (sc->ep_intrhand)  in ep_free()
255 		bus_teardown_intr(dev, sc->irq, sc->ep_intrhand);  in ep_free()
256 	if (sc->iobase)  in ep_free()
257 		bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->iobase);  in ep_free()
258 	if (sc->irq)  in ep_free()
259 		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq);  in ep_free()
260 	sc->ep_intrhand = 0;  in ep_free()
261 	sc->iobase = 0;  in ep_free()
262 	sc->irq = 0;  in ep_free()
266 ep_setup_station(struct ep_softc *sc, u_char *enaddr)  in ep_setup_station()  argument
273 	GO_WINDOW(sc, 2);  in ep_setup_station()
275 		CSR_WRITE_1(sc, EP_W2_ADDR_0 + i, enaddr[i]);  in ep_setup_station()
279 ep_attach(struct ep_softc *sc)  in ep_attach()  argument
285 	sc->gone = 0;  in ep_attach()
286 	EP_LOCK_INIT(sc);  in ep_attach()
287 	if (! (sc->stat & F_ENADDR_SKIP)) {  in ep_attach()
288 		error = ep_get_macaddr(sc, sc->eaddr);  in ep_attach()
290 			device_printf(sc->dev, "Unable to get MAC address!\n");  in ep_attach()
291 			EP_LOCK_DESTROY(sc);  in ep_attach()
295 	ep_setup_station(sc, sc->eaddr);  in ep_attach()
296 	ifp = sc->ifp = if_alloc(IFT_ETHER);  in ep_attach()
298 		device_printf(sc->dev, "if_alloc() failed\n");  in ep_attach()
299 		EP_LOCK_DESTROY(sc);  in ep_attach()
303 	ifp->if_softc = sc;  in ep_attach()
304 	if_initname(ifp, device_get_name(sc->dev), device_get_unit(sc->dev));  in ep_attach()
313 	callout_init_mtx(&sc->watchdog_timer, &sc->sc_mtx, 0);  in ep_attach()
314 	if (!sc->epb.mii_trans) {  in ep_attach()
315 		ifmedia_init(&sc->ifmedia, 0, ep_ifmedia_upd, ep_ifmedia_sts);  in ep_attach()
317 		if (sc->ep_connectors & AUI)  in ep_attach()
318 			ifmedia_add(&sc->ifmedia,  in ep_attach()
320 		if (sc->ep_connectors & UTP)  in ep_attach()
321 			ifmedia_add(&sc->ifmedia,  in ep_attach()
323 		if (sc->ep_connectors & BNC)  in ep_attach()
324 			ifmedia_add(&sc->ifmedia,  in ep_attach()
326 		if (!sc->ep_connectors)  in ep_attach()
327 			ifmedia_add(&sc->ifmedia,  in ep_attach()
330 		ifmedia_set(&sc->ifmedia,  in ep_attach()
331 		    IFM_ETHER | ep_media2if_media[sc->ep_connector]);  in ep_attach()
333 		ifm = &sc->ifmedia;  in ep_attach()
337 	ether_ifattach(ifp, sc->eaddr);  in ep_attach()
340 	sc->rx_no_first = sc->rx_no_mbuf = sc->rx_bpf_disc =  in ep_attach()
341 	    sc->rx_overrunf = sc->rx_overrunl = sc->tx_underrun = 0;  in ep_attach()
343 	EP_FSET(sc, F_RX_FIRST);  in ep_attach()
344 	sc->top = sc->mcur = 0;  in ep_attach()
346 	EP_LOCK(sc);  in ep_attach()
347 	epstop(sc);  in ep_attach()
348 	EP_UNLOCK(sc);  in ep_attach()
356 	struct ep_softc *sc;  in ep_detach()  local
359 	sc = device_get_softc(dev);  in ep_detach()
360 	ifp = sc->ifp;  in ep_detach()
361 	EP_ASSERT_UNLOCKED(sc);  in ep_detach()
362 	EP_LOCK(sc);  in ep_detach()
364 		epstop(sc);  in ep_detach()
365 	sc->gone = 1;  in ep_detach()
367 	EP_UNLOCK(sc);  in ep_detach()
369 	callout_drain(&sc->watchdog_timer);  in ep_detach()
373 	EP_LOCK_DESTROY(sc);  in ep_detach()
381 	struct ep_softc *sc = xsc;  in epinit()  local
382 	EP_LOCK(sc);  in epinit()
383 	epinit_locked(sc);  in epinit()
384 	EP_UNLOCK(sc);  in epinit()
392 epinit_locked(struct ep_softc *sc)  in epinit_locked()  argument
394 	struct ifnet *ifp = sc->ifp;  in epinit_locked()
397 	if (sc->gone)  in epinit_locked()
400 	EP_ASSERT_LOCKED(sc);  in epinit_locked()
401 	EP_BUSY_WAIT(sc);  in epinit_locked()
403 	GO_WINDOW(sc, 0);  in epinit_locked()
404 	CSR_WRITE_2(sc, EP_COMMAND, STOP_TRANSCEIVER);  in epinit_locked()
405 	GO_WINDOW(sc, 4);  in epinit_locked()
406 	CSR_WRITE_2(sc, EP_W4_MEDIA_TYPE, DISABLE_UTP);  in epinit_locked()
407 	GO_WINDOW(sc, 0);  in epinit_locked()
410 	CSR_WRITE_2(sc, EP_W0_CONFIG_CTRL, 0);  in epinit_locked()
413 	CSR_WRITE_2(sc, EP_W0_CONFIG_CTRL, ENABLE_DRQ_IRQ);  in epinit_locked()
415 	GO_WINDOW(sc, 2);  in epinit_locked()
417 	ep_setup_station(sc, IF_LLADDR(sc->ifp));  in epinit_locked()
419 	CSR_WRITE_2(sc, EP_COMMAND, RX_RESET);  in epinit_locked()
420 	CSR_WRITE_2(sc, EP_COMMAND, TX_RESET);  in epinit_locked()
421 	EP_BUSY_WAIT(sc);  in epinit_locked()
424 	GO_WINDOW(sc, 1);  in epinit_locked()
426 		CSR_READ_1(sc, EP_W1_TX_STATUS);  in epinit_locked()
429 	CSR_WRITE_2(sc, EP_COMMAND, ACK_INTR | 0xff);  in epinit_locked()
431 	CSR_WRITE_2(sc, EP_COMMAND, SET_RD_0_MASK | S_5_INTS);  in epinit_locked()
432 	CSR_WRITE_2(sc, EP_COMMAND, SET_INTR_MASK | S_5_INTS);  in epinit_locked()
435 		CSR_WRITE_2(sc, EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL |  in epinit_locked()
438 		CSR_WRITE_2(sc, EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL |  in epinit_locked()
441 	if (!sc->epb.mii_trans)  in epinit_locked()
444 	if (sc->stat & F_HAS_TX_PLL)  in epinit_locked()
445 		CSR_WRITE_2(sc, EP_COMMAND, TX_PLL_ENABLE);  in epinit_locked()
446 	CSR_WRITE_2(sc, EP_COMMAND, RX_ENABLE);  in epinit_locked()
447 	CSR_WRITE_2(sc, EP_COMMAND, TX_ENABLE);  in epinit_locked()
453 	sc->rx_no_first = sc->rx_no_mbuf =  in epinit_locked()
454 	    sc->rx_overrunf = sc->rx_overrunl = sc->tx_underrun = 0;  in epinit_locked()
456 	EP_FSET(sc, F_RX_FIRST);  in epinit_locked()
457 	if (sc->top) {  in epinit_locked()
458 		m_freem(sc->top);  in epinit_locked()
459 		sc->top = sc->mcur = 0;  in epinit_locked()
461 	CSR_WRITE_2(sc, EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH);  in epinit_locked()
462 	CSR_WRITE_2(sc, EP_COMMAND, SET_TX_START_THRESH | 16);  in epinit_locked()
464 	GO_WINDOW(sc, 1);  in epinit_locked()
466 	callout_reset(&sc->watchdog_timer, hz, eptick, sc);  in epinit_locked()
472 	struct ep_softc *sc;  in epstart()  local
473 	sc = ifp->if_softc;  in epstart()
474 	EP_LOCK(sc);  in epstart()
476 	EP_UNLOCK(sc);  in epstart()
482 	struct ep_softc *sc;  in epstart_locked()  local
487 	sc = ifp->if_softc;  in epstart_locked()
488 	if (sc->gone)  in epstart_locked()
490 	EP_ASSERT_LOCKED(sc);  in epstart_locked()
491 	EP_BUSY_WAIT(sc);  in epstart_locked()
500 	if (!started && (sc->stat & F_HAS_TX_PLL))  in epstart_locked()
501 		CSR_WRITE_2(sc, EP_COMMAND, TX_PLL_ENABLE);  in epstart_locked()
519 	if (CSR_READ_2(sc, EP_W1_FREE_TX) < len + pad + 4) {  in epstart_locked()
521 		CSR_WRITE_2(sc, EP_COMMAND, SET_TX_AVAIL_THRESH | (len + pad + 4));  in epstart_locked()
523 		if (CSR_READ_2(sc, EP_W1_FREE_TX) < len + pad + 4) {  in epstart_locked()
529 		CSR_WRITE_2(sc, EP_COMMAND,  in epstart_locked()
534 	CSR_WRITE_2(sc, EP_W1_TX_PIO_WR_1, len);  in epstart_locked()
536 	CSR_WRITE_2(sc, EP_W1_TX_PIO_WR_1, 0x0);  in epstart_locked()
538 	if (EP_FTST(sc, F_ACCESS_32_BITS)) {  in epstart_locked()
541 				CSR_WRITE_MULTI_4(sc, EP_W1_TX_PIO_WR_1,  in epstart_locked()
544 				CSR_WRITE_MULTI_1(sc, EP_W1_TX_PIO_WR_1,  in epstart_locked()
551 				CSR_WRITE_MULTI_2(sc, EP_W1_TX_PIO_WR_1,  in epstart_locked()
554 				CSR_WRITE_1(sc, EP_W1_TX_PIO_WR_1,  in epstart_locked()
560 		CSR_WRITE_1(sc, EP_W1_TX_PIO_WR_1, 0);	/* Padding */  in epstart_locked()
566 	sc->tx_timer = 2;  in epstart_locked()
575 	if (CSR_READ_2(sc, EP_W1_RX_STATUS) & RX_BYTES_MASK) {  in epstart_locked()
581 			CSR_WRITE_2(sc, EP_COMMAND, SET_TX_AVAIL_THRESH | 8);  in epstart_locked()
592 	struct ep_softc *sc;  in ep_intr()  local
594 	sc = (struct ep_softc *) arg;  in ep_intr()
595 	EP_LOCK(sc);  in ep_intr()
596 	ep_intr_locked(sc);  in ep_intr()
597 	EP_UNLOCK(sc);  in ep_intr()
601 ep_intr_locked(struct ep_softc *sc)  in ep_intr_locked()  argument
611 	if (sc->gone || CSR_READ_2(sc, EP_STATUS) == 0xffff)  in ep_intr_locked()
613 	ifp = sc->ifp;  in ep_intr_locked()
615 	CSR_WRITE_2(sc, EP_COMMAND, SET_INTR_MASK);	/* disable all Ints */  in ep_intr_locked()
619 	while ((status = CSR_READ_2(sc, EP_STATUS)) & S_5_INTS) {  in ep_intr_locked()
622 		CSR_WRITE_2(sc, EP_COMMAND, ACK_INTR | (status & S_MASK));  in ep_intr_locked()
625 			epread(sc);  in ep_intr_locked()
628 			sc->tx_timer = 0;  in ep_intr_locked()
630 			GO_WINDOW(sc, 1);  in ep_intr_locked()
631 			CSR_READ_2(sc, EP_W1_FREE_TX);  in ep_intr_locked()
635 			sc->tx_timer = 0;  in ep_intr_locked()
637 			device_printf(sc->dev, "\n\tStatus: %x\n", status);  in ep_intr_locked()
638 			GO_WINDOW(sc, 4);  in ep_intr_locked()
640 			    CSR_READ_2(sc, EP_W4_FIFO_DIAG));  in ep_intr_locked()
641 			printf("\tStat: %x\n", sc->stat);  in ep_intr_locked()
646 			    sc->rx_no_first, sc->rx_no_mbuf, sc->rx_overrunf,  in ep_intr_locked()
647 			    sc->rx_overrunl, sc->tx_underrun);  in ep_intr_locked()
651 			device_printf(sc->dev,  in ep_intr_locked()
658 			epinit_locked(sc);  in ep_intr_locked()
662 			sc->tx_timer = 0;  in ep_intr_locked()
669 			while ((status = CSR_READ_1(sc, EP_W1_TX_STATUS)) &  in ep_intr_locked()
676 					CSR_WRITE_2(sc, EP_COMMAND, TX_RESET);  in ep_intr_locked()
679 						sc->tx_underrun++;  in ep_intr_locked()
690 					CSR_WRITE_2(sc, EP_COMMAND, TX_ENABLE);  in ep_intr_locked()
696 						CSR_WRITE_2(sc, EP_COMMAND,  in ep_intr_locked()
700 				CSR_WRITE_1(sc, EP_W1_TX_STATUS, 0x0);  in ep_intr_locked()
703 			GO_WINDOW(sc, 1);  in ep_intr_locked()
704 			CSR_READ_2(sc, EP_W1_FREE_TX);  in ep_intr_locked()
709 	CSR_WRITE_2(sc, EP_COMMAND, C_INTR_LATCH);	/* ACK int Latch */  in ep_intr_locked()
711 	if ((status = CSR_READ_2(sc, EP_STATUS)) & S_5_INTS)  in ep_intr_locked()
715 	CSR_WRITE_2(sc, EP_COMMAND, SET_INTR_MASK | S_5_INTS);  in ep_intr_locked()
719 epread(struct ep_softc *sc)  in epread()  argument
729 	ifp = sc->ifp;  in epread()
730 	status = CSR_READ_2(sc, EP_W1_RX_STATUS);  in epread()
742 			if (EP_FTST(sc, F_RX_FIRST))  in epread()
743 				sc->rx_overrunf++;  in epread()
745 				sc->rx_overrunl++;  in epread()
752 	if (EP_FTST(sc, F_RX_FIRST)) {  in epread()
758 		sc->top = sc->mcur = top = m;  in epread()
764 		CSR_READ_MULTI_2(sc, EP_W1_RX_PIO_RD_1,  in epread()
768 		sc->cur_len = rx_fifo2;  in epread()
771 		top = sc->top;  in epread()
772 		m = sc->mcur;  in epread()
773 		sc->cur_len += rx_fifo2;  in epread()
790 		if (EP_FTST(sc, F_ACCESS_32_BITS)) {  in epread()
792 			CSR_READ_MULTI_4(sc, EP_W1_RX_PIO_RD_1,  in epread()
797 				CSR_READ_MULTI_1(sc, EP_W1_RX_PIO_RD_1,  in epread()
801 			CSR_READ_MULTI_2(sc, EP_W1_RX_PIO_RD_1,  in epread()
807 				    CSR_READ_1(sc, EP_W1_RX_PIO_RD_1);  in epread()
814 		sc->mcur = m;  in epread()
817 		sc->rx_no_first++;  in epread()
819 		EP_FRST(sc, F_RX_FIRST);  in epread()
820 		status = CSR_READ_2(sc, EP_W1_RX_STATUS);  in epread()
828 		CSR_WRITE_2(sc, EP_COMMAND,  in epread()
832 	CSR_WRITE_2(sc, EP_COMMAND, RX_DISCARD_TOP_PACK);  in epread()
834 	EP_FSET(sc, F_RX_FIRST);  in epread()
835 	top->m_pkthdr.rcvif = sc->ifp;  in epread()
836 	top->m_pkthdr.len = sc->cur_len;  in epread()
845 	EP_UNLOCK(sc);  in epread()
847 	EP_LOCK(sc);  in epread()
848 	sc->top = 0;  in epread()
849 	EP_BUSY_WAIT(sc);  in epread()
850 	CSR_WRITE_2(sc, EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH);  in epread()
854 	CSR_WRITE_2(sc, EP_COMMAND, RX_DISCARD_TOP_PACK);  in epread()
855 	if (sc->top) {  in epread()
856 		m_freem(sc->top);  in epread()
857 		sc->top = 0;  in epread()
859 		sc->rx_no_mbuf++;  in epread()
862 	EP_FSET(sc, F_RX_FIRST);  in epread()
863 	EP_BUSY_WAIT(sc);  in epread()
864 	CSR_WRITE_2(sc, EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH);  in epread()
870 	struct ep_softc *sc = ifp->if_softc;  in ep_ifmedia_upd()  local
873 	GO_WINDOW(sc, 0);  in ep_ifmedia_upd()
874 	CSR_WRITE_2(sc, EP_COMMAND, STOP_TRANSCEIVER);  in ep_ifmedia_upd()
875 	GO_WINDOW(sc, 4);  in ep_ifmedia_upd()
876 	CSR_WRITE_2(sc, EP_W4_MEDIA_TYPE, DISABLE_UTP);  in ep_ifmedia_upd()
877 	GO_WINDOW(sc, 0);  in ep_ifmedia_upd()
879 	switch (IFM_SUBTYPE(sc->ifmedia.ifm_media)) {  in ep_ifmedia_upd()
881 		if (sc->ep_connectors & UTP) {  in ep_ifmedia_upd()
883 			GO_WINDOW(sc, 4);  in ep_ifmedia_upd()
884 			CSR_WRITE_2(sc, EP_W4_MEDIA_TYPE, ENABLE_UTP);  in ep_ifmedia_upd()
888 		if (sc->ep_connectors & BNC) {  in ep_ifmedia_upd()
890 			CSR_WRITE_2(sc, EP_COMMAND, START_TRANSCEIVER);  in ep_ifmedia_upd()
895 		if (sc->ep_connectors & AUI)  in ep_ifmedia_upd()
899 		i = sc->ep_connector;  in ep_ifmedia_upd()
900 		device_printf(sc->dev,  in ep_ifmedia_upd()
904 	GO_WINDOW(sc, 0);  in ep_ifmedia_upd()
905 	j = CSR_READ_2(sc, EP_W0_ADDRESS_CFG) & 0x3fff;  in ep_ifmedia_upd()
906 	CSR_WRITE_2(sc, EP_W0_ADDRESS_CFG, j | (i << ACF_CONNECTOR_BITS));  in ep_ifmedia_upd()
914 	struct ep_softc *sc = ifp->if_softc;  in ep_ifmedia_sts()  local
917 	switch (IFM_SUBTYPE(sc->ifmedia.ifm_media)) {  in ep_ifmedia_sts()
919 		GO_WINDOW(sc, 4);  in ep_ifmedia_sts()
920 		ms = CSR_READ_2(sc, EP_W4_MEDIA_TYPE);  in ep_ifmedia_sts()
921 		GO_WINDOW(sc, 0);  in ep_ifmedia_sts()
931 		ifmr->ifm_active = sc->ifmedia.ifm_media;  in ep_ifmedia_sts()
939 	struct ep_softc *sc = ifp->if_softc;  in epioctl()  local
945 		EP_LOCK(sc);  in epioctl()
948 			epstop(sc);  in epioctl()
951 			epinit_locked(sc);  in epioctl()
952 		EP_UNLOCK(sc);  in epioctl()
967 		if (!sc->epb.mii_trans)  in epioctl()
968 			error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, cmd);  in epioctl()
982 	struct ep_softc *sc;  in eptick()  local
984 	sc = arg;  in eptick()
985 	if (sc->tx_timer != 0 && --sc->tx_timer == 0)  in eptick()
986 		epwatchdog(sc);  in eptick()
987 	callout_reset(&sc->watchdog_timer, hz, eptick, sc);  in eptick()
991 epwatchdog(struct ep_softc *sc)  in epwatchdog()  argument
995 	ifp = sc->ifp;  in epwatchdog()
996 	if (sc->gone)  in epwatchdog()
1000 	ep_intr_locked(sc);  in epwatchdog()
1004 epstop(struct ep_softc *sc)  in epstop()  argument
1007 	EP_ASSERT_LOCKED(sc);  in epstop()
1009 	CSR_WRITE_2(sc, EP_COMMAND, RX_DISABLE);  in epstop()
1010 	CSR_WRITE_2(sc, EP_COMMAND, RX_DISCARD_TOP_PACK);  in epstop()
1011 	EP_BUSY_WAIT(sc);  in epstop()
1013 	CSR_WRITE_2(sc, EP_COMMAND, TX_DISABLE);  in epstop()
1014 	CSR_WRITE_2(sc, EP_COMMAND, STOP_TRANSCEIVER);  in epstop()
1017 	CSR_WRITE_2(sc, EP_COMMAND, RX_RESET);  in epstop()
1018 	EP_BUSY_WAIT(sc);  in epstop()
1019 	CSR_WRITE_2(sc, EP_COMMAND, TX_RESET);  in epstop()
1020 	EP_BUSY_WAIT(sc);  in epstop()
1022 	CSR_WRITE_2(sc, EP_COMMAND, C_INTR_LATCH);  in epstop()
1023 	CSR_WRITE_2(sc, EP_COMMAND, SET_RD_0_MASK);  in epstop()
1024 	CSR_WRITE_2(sc, EP_COMMAND, SET_INTR_MASK);  in epstop()
1025 	CSR_WRITE_2(sc, EP_COMMAND, SET_RX_FILTER);  in epstop()
1027 	sc->ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);  in epstop()
1028 	callout_stop(&sc->watchdog_timer);  in epstop()