1/*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1997, 1998, 1999, 2000
5 *	Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by Bill Paul.
18 * 4. Neither the name of the author nor the names of any co-contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38/*
39 * Kawasaki LSI KL5KUSB101B USB to ethernet adapter driver.
40 *
41 * Written by Bill Paul <wpaul@ee.columbia.edu>
42 * Electrical Engineering Department
43 * Columbia University, New York City
44 */
45
46/*
47 * The KLSI USB to ethernet adapter chip contains an USB serial interface,
48 * ethernet MAC and embedded microcontroller (called the QT Engine).
49 * The chip must have firmware loaded into it before it will operate.
50 * Packets are passed between the chip and host via bulk transfers.
51 * There is an interrupt endpoint mentioned in the software spec, however
52 * it's currently unused. This device is 10Mbps half-duplex only, hence
53 * there is no media selection logic. The MAC supports a 128 entry
54 * multicast filter, though the exact size of the filter can depend
55 * on the firmware. Curiously, while the software spec describes various
56 * ethernet statistics counters, my sample adapter and firmware combination
57 * claims not to support any statistics counters at all.
58 *
59 * Note that once we load the firmware in the device, we have to be
60 * careful not to load it again: if you restart your computer but
61 * leave the adapter attached to the USB controller, it may remain
62 * powered on and retain its firmware. In this case, we don't need
63 * to load the firmware a second time.
64 *
65 * Special thanks to Rob Furr for providing an ADS Technologies
66 * adapter for development and testing. No monkeys were harmed during
67 * the development of this driver.
68 */
69
70#include <sys/stdint.h>
71#include <sys/stddef.h>
72#include <sys/param.h>
73#include <sys/queue.h>
74#include <sys/types.h>
75#include <sys/systm.h>
76#include <sys/socket.h>
77#include <sys/kernel.h>
78#include <sys/bus.h>
79#include <sys/module.h>
80#include <sys/lock.h>
81#include <sys/mutex.h>
82#include <sys/condvar.h>
83#include <sys/sysctl.h>
84#include <sys/sx.h>
85#include <sys/unistd.h>
86#include <sys/callout.h>
87#include <sys/malloc.h>
88#include <sys/priv.h>
89
90#include <net/if.h>
91#include <net/if_var.h>
92
93#include <dev/usb/usb.h>
94#include <dev/usb/usbdi.h>
95#include <dev/usb/usbdi_util.h>
96#include "usbdevs.h"
97
98#define	USB_DEBUG_VAR kue_debug
99#include <dev/usb/usb_debug.h>
100#include <dev/usb/usb_process.h>
101
102#include <dev/usb/net/usb_ethernet.h>
103#include <dev/usb/net/if_kuereg.h>
104#include <dev/usb/net/if_kuefw.h>
105
106/*
107 * Various supported device vendors/products.
108 */
109static const STRUCT_USB_HOST_ID kue_devs[] = {
110#define	KUE_DEV(v,p) { USB_VP(USB_VENDOR_##v, USB_PRODUCT_##v##_##p) }
111	KUE_DEV(3COM, 3C19250),
112	KUE_DEV(3COM, 3C460),
113	KUE_DEV(ABOCOM, URE450),
114	KUE_DEV(ADS, UBS10BT),
115	KUE_DEV(ADS, UBS10BTX),
116	KUE_DEV(AOX, USB101),
117	KUE_DEV(ASANTE, EA),
118	KUE_DEV(ATEN, DSB650C),
119	KUE_DEV(ATEN, UC10T),
120	KUE_DEV(COREGA, ETHER_USB_T),
121	KUE_DEV(DLINK, DSB650C),
122	KUE_DEV(ENTREGA, E45),
123	KUE_DEV(ENTREGA, XX1),
124	KUE_DEV(ENTREGA, XX2),
125	KUE_DEV(IODATA, USBETT),
126	KUE_DEV(JATON, EDA),
127	KUE_DEV(KINGSTON, XX1),
128	KUE_DEV(KLSI, DUH3E10BT),
129	KUE_DEV(KLSI, DUH3E10BTN),
130	KUE_DEV(LINKSYS, USB10T),
131	KUE_DEV(MOBILITY, EA),
132	KUE_DEV(NETGEAR, EA101),
133	KUE_DEV(NETGEAR, EA101X),
134	KUE_DEV(PERACOM, ENET),
135	KUE_DEV(PERACOM, ENET2),
136	KUE_DEV(PERACOM, ENET3),
137	KUE_DEV(PORTGEAR, EA8),
138	KUE_DEV(PORTGEAR, EA9),
139	KUE_DEV(PORTSMITH, EEA),
140	KUE_DEV(SHARK, PA),
141	KUE_DEV(SILICOM, GPE),
142	KUE_DEV(SILICOM, U2E),
143	KUE_DEV(SMC, 2102USB),
144#undef KUE_DEV
145};
146
147/* prototypes */
148
149static device_probe_t kue_probe;
150static device_attach_t kue_attach;
151static device_detach_t kue_detach;
152
153static usb_callback_t kue_bulk_read_callback;
154static usb_callback_t kue_bulk_write_callback;
155
156static uether_fn_t kue_attach_post;
157static uether_fn_t kue_init;
158static uether_fn_t kue_stop;
159static uether_fn_t kue_start;
160static uether_fn_t kue_setmulti;
161static uether_fn_t kue_setpromisc;
162
163static int	kue_do_request(struct kue_softc *,
164		    struct usb_device_request *, void *);
165static int	kue_setword(struct kue_softc *, uint8_t, uint16_t);
166static int	kue_ctl(struct kue_softc *, uint8_t, uint8_t, uint16_t,
167		    void *, int);
168static int	kue_load_fw(struct kue_softc *);
169static void	kue_reset(struct kue_softc *);
170
171#ifdef USB_DEBUG
172static int kue_debug = 0;
173
174static SYSCTL_NODE(_hw_usb, OID_AUTO, kue, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
175    "USB kue");
176SYSCTL_INT(_hw_usb_kue, OID_AUTO, debug, CTLFLAG_RWTUN, &kue_debug, 0,
177    "Debug level");
178#endif
179
180static const struct usb_config kue_config[KUE_N_TRANSFER] = {
181	[KUE_BULK_DT_WR] = {
182		.type = UE_BULK,
183		.endpoint = UE_ADDR_ANY,
184		.direction = UE_DIR_OUT,
185		.bufsize = (MCLBYTES + 2 + 64),
186		.flags = {.pipe_bof = 1,},
187		.callback = kue_bulk_write_callback,
188		.timeout = 10000,	/* 10 seconds */
189	},
190
191	[KUE_BULK_DT_RD] = {
192		.type = UE_BULK,
193		.endpoint = UE_ADDR_ANY,
194		.direction = UE_DIR_IN,
195		.bufsize = (MCLBYTES + 2),
196		.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
197		.callback = kue_bulk_read_callback,
198		.timeout = 0,	/* no timeout */
199	},
200};
201
202static device_method_t kue_methods[] = {
203	/* Device interface */
204	DEVMETHOD(device_probe, kue_probe),
205	DEVMETHOD(device_attach, kue_attach),
206	DEVMETHOD(device_detach, kue_detach),
207
208	DEVMETHOD_END
209};
210
211static driver_t kue_driver = {
212	.name = "kue",
213	.methods = kue_methods,
214	.size = sizeof(struct kue_softc),
215};
216
217static devclass_t kue_devclass;
218
219DRIVER_MODULE(kue, uhub, kue_driver, kue_devclass, NULL, 0);
220MODULE_DEPEND(kue, uether, 1, 1, 1);
221MODULE_DEPEND(kue, usb, 1, 1, 1);
222MODULE_DEPEND(kue, ether, 1, 1, 1);
223MODULE_VERSION(kue, 1);
224USB_PNP_HOST_INFO(kue_devs);
225
226static const struct usb_ether_methods kue_ue_methods = {
227	.ue_attach_post = kue_attach_post,
228	.ue_start = kue_start,
229	.ue_init = kue_init,
230	.ue_stop = kue_stop,
231	.ue_setmulti = kue_setmulti,
232	.ue_setpromisc = kue_setpromisc,
233};
234
235/*
236 * We have a custom do_request function which is almost like the
237 * regular do_request function, except it has a much longer timeout.
238 * Why? Because we need to make requests over the control endpoint
239 * to download the firmware to the device, which can take longer
240 * than the default timeout.
241 */
242static int
243kue_do_request(struct kue_softc *sc, struct usb_device_request *req,
244    void *data)
245{
246	usb_error_t err;
247
248	err = uether_do_request(&sc->sc_ue, req, data, 60000);
249
250	return (err);
251}
252
253static int
254kue_setword(struct kue_softc *sc, uint8_t breq, uint16_t word)
255{
256	struct usb_device_request req;
257
258	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
259	req.bRequest = breq;
260	USETW(req.wValue, word);
261	USETW(req.wIndex, 0);
262	USETW(req.wLength, 0);
263
264	return (kue_do_request(sc, &req, NULL));
265}
266
267static int
268kue_ctl(struct kue_softc *sc, uint8_t rw, uint8_t breq,
269    uint16_t val, void *data, int len)
270{
271	struct usb_device_request req;
272
273	if (rw == KUE_CTL_WRITE)
274		req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
275	else
276		req.bmRequestType = UT_READ_VENDOR_DEVICE;
277
278	req.bRequest = breq;
279	USETW(req.wValue, val);
280	USETW(req.wIndex, 0);
281	USETW(req.wLength, len);
282
283	return (kue_do_request(sc, &req, data));
284}
285
286static int
287kue_load_fw(struct kue_softc *sc)
288{
289	struct usb_device_descriptor *dd;
290	uint16_t hwrev;
291	usb_error_t err;
292
293	dd = usbd_get_device_descriptor(sc->sc_ue.ue_udev);
294	hwrev = UGETW(dd->bcdDevice);
295
296	/*
297	 * First, check if we even need to load the firmware.
298	 * If the device was still attached when the system was
299	 * rebooted, it may already have firmware loaded in it.
300	 * If this is the case, we don't need to do it again.
301	 * And in fact, if we try to load it again, we'll hang,
302	 * so we have to avoid this condition if we don't want
303	 * to look stupid.
304	 *
305	 * We can test this quickly by checking the bcdRevision
306	 * code. The NIC will return a different revision code if
307	 * it's probed while the firmware is still loaded and
308	 * running.
309	 */
310	if (hwrev == 0x0202)
311		return(0);
312
313	/* Load code segment */
314	err = kue_ctl(sc, KUE_CTL_WRITE, KUE_CMD_SEND_SCAN,
315	    0, kue_code_seg, sizeof(kue_code_seg));
316	if (err) {
317		device_printf(sc->sc_ue.ue_dev, "failed to load code segment: %s\n",
318		    usbd_errstr(err));
319		return(ENXIO);
320	}
321
322	/* Load fixup segment */
323	err = kue_ctl(sc, KUE_CTL_WRITE, KUE_CMD_SEND_SCAN,
324	    0, kue_fix_seg, sizeof(kue_fix_seg));
325	if (err) {
326		device_printf(sc->sc_ue.ue_dev, "failed to load fixup segment: %s\n",
327		    usbd_errstr(err));
328		return(ENXIO);
329	}
330
331	/* Send trigger command. */
332	err = kue_ctl(sc, KUE_CTL_WRITE, KUE_CMD_SEND_SCAN,
333	    0, kue_trig_seg, sizeof(kue_trig_seg));
334	if (err) {
335		device_printf(sc->sc_ue.ue_dev, "failed to load trigger segment: %s\n",
336		    usbd_errstr(err));
337		return(ENXIO);
338	}
339
340	return (0);
341}
342
343static void
344kue_setpromisc(struct usb_ether *ue)
345{
346	struct kue_softc *sc = uether_getsc(ue);
347	struct ifnet *ifp = uether_getifp(ue);
348
349	KUE_LOCK_ASSERT(sc, MA_OWNED);
350
351	if (ifp->if_flags & IFF_PROMISC)
352		sc->sc_rxfilt |= KUE_RXFILT_PROMISC;
353	else
354		sc->sc_rxfilt &= ~KUE_RXFILT_PROMISC;
355
356	kue_setword(sc, KUE_CMD_SET_PKT_FILTER, sc->sc_rxfilt);
357}
358
359static u_int
360kue_copy_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt)
361{
362	struct kue_softc *sc = arg;
363
364	if (cnt >= KUE_MCFILTCNT(sc))
365		return (1);
366
367	memcpy(KUE_MCFILT(sc, cnt), LLADDR(sdl), ETHER_ADDR_LEN);
368
369	return (1);
370}
371
372static void
373kue_setmulti(struct usb_ether *ue)
374{
375	struct kue_softc *sc = uether_getsc(ue);
376	struct ifnet *ifp = uether_getifp(ue);
377	int i;
378
379	KUE_LOCK_ASSERT(sc, MA_OWNED);
380
381	if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
382		sc->sc_rxfilt |= KUE_RXFILT_ALLMULTI;
383		sc->sc_rxfilt &= ~KUE_RXFILT_MULTICAST;
384		kue_setword(sc, KUE_CMD_SET_PKT_FILTER, sc->sc_rxfilt);
385		return;
386	}
387
388	sc->sc_rxfilt &= ~KUE_RXFILT_ALLMULTI;
389
390	i = if_foreach_llmaddr(ifp, kue_copy_maddr, sc);
391
392	if (i >= KUE_MCFILTCNT(sc))
393		sc->sc_rxfilt |= KUE_RXFILT_ALLMULTI;
394	else {
395		sc->sc_rxfilt |= KUE_RXFILT_MULTICAST;
396		kue_ctl(sc, KUE_CTL_WRITE, KUE_CMD_SET_MCAST_FILTERS,
397		    i, sc->sc_mcfilters, i * ETHER_ADDR_LEN);
398	}
399
400	kue_setword(sc, KUE_CMD_SET_PKT_FILTER, sc->sc_rxfilt);
401}
402
403/*
404 * Issue a SET_CONFIGURATION command to reset the MAC. This should be
405 * done after the firmware is loaded into the adapter in order to
406 * bring it into proper operation.
407 */
408static void
409kue_reset(struct kue_softc *sc)
410{
411	struct usb_config_descriptor *cd;
412	usb_error_t err;
413
414	cd = usbd_get_config_descriptor(sc->sc_ue.ue_udev);
415
416	err = usbd_req_set_config(sc->sc_ue.ue_udev, &sc->sc_mtx,
417	    cd->bConfigurationValue);
418	if (err)
419		DPRINTF("reset failed (ignored)\n");
420
421	/* wait a little while for the chip to get its brains in order */
422	uether_pause(&sc->sc_ue, hz / 100);
423}
424
425static void
426kue_attach_post(struct usb_ether *ue)
427{
428	struct kue_softc *sc = uether_getsc(ue);
429	int error;
430
431	/* load the firmware into the NIC */
432	error = kue_load_fw(sc);
433	if (error) {
434		device_printf(sc->sc_ue.ue_dev, "could not load firmware\n");
435		/* ignore the error */
436	}
437
438	/* reset the adapter */
439	kue_reset(sc);
440
441	/* read ethernet descriptor */
442	kue_ctl(sc, KUE_CTL_READ, KUE_CMD_GET_ETHER_DESCRIPTOR,
443	    0, &sc->sc_desc, sizeof(sc->sc_desc));
444
445	/* copy in ethernet address */
446	memcpy(ue->ue_eaddr, sc->sc_desc.kue_macaddr, sizeof(ue->ue_eaddr));
447}
448
449/*
450 * Probe for a KLSI chip.
451 */
452static int
453kue_probe(device_t dev)
454{
455	struct usb_attach_arg *uaa = device_get_ivars(dev);
456
457	if (uaa->usb_mode != USB_MODE_HOST)
458		return (ENXIO);
459	if (uaa->info.bConfigIndex != KUE_CONFIG_IDX)
460		return (ENXIO);
461	if (uaa->info.bIfaceIndex != KUE_IFACE_IDX)
462		return (ENXIO);
463
464	return (usbd_lookup_id_by_uaa(kue_devs, sizeof(kue_devs), uaa));
465}
466
467/*
468 * Attach the interface. Allocate softc structures, do
469 * setup and ethernet/BPF attach.
470 */
471static int
472kue_attach(device_t dev)
473{
474	struct usb_attach_arg *uaa = device_get_ivars(dev);
475	struct kue_softc *sc = device_get_softc(dev);
476	struct usb_ether *ue = &sc->sc_ue;
477	uint8_t iface_index;
478	int error;
479
480	device_set_usb_desc(dev);
481	mtx_init(&sc->sc_mtx, device_get_nameunit(dev), NULL, MTX_DEF);
482
483	iface_index = KUE_IFACE_IDX;
484	error = usbd_transfer_setup(uaa->device, &iface_index,
485	    sc->sc_xfer, kue_config, KUE_N_TRANSFER, sc, &sc->sc_mtx);
486	if (error) {
487		device_printf(dev, "allocating USB transfers failed\n");
488		goto detach;
489	}
490
491	sc->sc_mcfilters = malloc(KUE_MCFILTCNT(sc) * ETHER_ADDR_LEN,
492	    M_USBDEV, M_WAITOK);
493	if (sc->sc_mcfilters == NULL) {
494		device_printf(dev, "failed allocating USB memory\n");
495		goto detach;
496	}
497
498	ue->ue_sc = sc;
499	ue->ue_dev = dev;
500	ue->ue_udev = uaa->device;
501	ue->ue_mtx = &sc->sc_mtx;
502	ue->ue_methods = &kue_ue_methods;
503
504	error = uether_ifattach(ue);
505	if (error) {
506		device_printf(dev, "could not attach interface\n");
507		goto detach;
508	}
509	return (0);			/* success */
510
511detach:
512	kue_detach(dev);
513	return (ENXIO);			/* failure */
514}
515
516static int
517kue_detach(device_t dev)
518{
519	struct kue_softc *sc = device_get_softc(dev);
520	struct usb_ether *ue = &sc->sc_ue;
521
522	usbd_transfer_unsetup(sc->sc_xfer, KUE_N_TRANSFER);
523	uether_ifdetach(ue);
524	mtx_destroy(&sc->sc_mtx);
525	free(sc->sc_mcfilters, M_USBDEV);
526
527	return (0);
528}
529
530/*
531 * A frame has been uploaded: pass the resulting mbuf chain up to
532 * the higher level protocols.
533 */
534static void
535kue_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error)
536{
537	struct kue_softc *sc = usbd_xfer_softc(xfer);
538	struct usb_ether *ue = &sc->sc_ue;
539	struct ifnet *ifp = uether_getifp(ue);
540	struct usb_page_cache *pc;
541	uint8_t buf[2];
542	int len;
543	int actlen;
544
545	usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
546
547	switch (USB_GET_STATE(xfer)) {
548	case USB_ST_TRANSFERRED:
549
550		if (actlen <= (int)(2 + sizeof(struct ether_header))) {
551			if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
552			goto tr_setup;
553		}
554		pc = usbd_xfer_get_frame(xfer, 0);
555		usbd_copy_out(pc, 0, buf, 2);
556		actlen -= 2;
557		len = buf[0] | (buf[1] << 8);
558		len = min(actlen, len);
559
560		uether_rxbuf(ue, pc, 2, len);
561		/* FALLTHROUGH */
562	case USB_ST_SETUP:
563tr_setup:
564		usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
565		usbd_transfer_submit(xfer);
566		uether_rxflush(ue);
567		return;
568
569	default:			/* Error */
570		DPRINTF("bulk read error, %s\n",
571		    usbd_errstr(error));
572
573		if (error != USB_ERR_CANCELLED) {
574			/* try to clear stall first */
575			usbd_xfer_set_stall(xfer);
576			goto tr_setup;
577		}
578		return;
579	}
580}
581
582static void
583kue_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error)
584{
585	struct kue_softc *sc = usbd_xfer_softc(xfer);
586	struct ifnet *ifp = uether_getifp(&sc->sc_ue);
587	struct usb_page_cache *pc;
588	struct mbuf *m;
589	int total_len;
590	int temp_len;
591	uint8_t buf[2];
592
593	switch (USB_GET_STATE(xfer)) {
594	case USB_ST_TRANSFERRED:
595		DPRINTFN(11, "transfer complete\n");
596		if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
597
598		/* FALLTHROUGH */
599	case USB_ST_SETUP:
600tr_setup:
601		IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
602
603		if (m == NULL)
604			return;
605		if (m->m_pkthdr.len > MCLBYTES)
606			m->m_pkthdr.len = MCLBYTES;
607		temp_len = (m->m_pkthdr.len + 2);
608		total_len = (temp_len + (64 - (temp_len % 64)));
609
610		/* the first two bytes are the frame length */
611
612		buf[0] = (uint8_t)(m->m_pkthdr.len);
613		buf[1] = (uint8_t)(m->m_pkthdr.len >> 8);
614
615		pc = usbd_xfer_get_frame(xfer, 0);
616		usbd_copy_in(pc, 0, buf, 2);
617		usbd_m_copy_in(pc, 2, m, 0, m->m_pkthdr.len);
618
619		usbd_frame_zero(pc, temp_len, total_len - temp_len);
620		usbd_xfer_set_frame_len(xfer, 0, total_len);
621
622		/*
623		 * if there's a BPF listener, bounce a copy
624		 * of this frame to him:
625		 */
626		BPF_MTAP(ifp, m);
627
628		m_freem(m);
629
630		usbd_transfer_submit(xfer);
631
632		return;
633
634	default:			/* Error */
635		DPRINTFN(11, "transfer error, %s\n",
636		    usbd_errstr(error));
637
638		if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
639
640		if (error != USB_ERR_CANCELLED) {
641			/* try to clear stall first */
642			usbd_xfer_set_stall(xfer);
643			goto tr_setup;
644		}
645		return;
646	}
647}
648
649static void
650kue_start(struct usb_ether *ue)
651{
652	struct kue_softc *sc = uether_getsc(ue);
653
654	/*
655	 * start the USB transfers, if not already started:
656	 */
657	usbd_transfer_start(sc->sc_xfer[KUE_BULK_DT_RD]);
658	usbd_transfer_start(sc->sc_xfer[KUE_BULK_DT_WR]);
659}
660
661static void
662kue_init(struct usb_ether *ue)
663{
664	struct kue_softc *sc = uether_getsc(ue);
665	struct ifnet *ifp = uether_getifp(ue);
666
667	KUE_LOCK_ASSERT(sc, MA_OWNED);
668
669	/* set MAC address */
670	kue_ctl(sc, KUE_CTL_WRITE, KUE_CMD_SET_MAC,
671	    0, IF_LLADDR(ifp), ETHER_ADDR_LEN);
672
673	/* I'm not sure how to tune these. */
674#if 0
675	/*
676	 * Leave this one alone for now; setting it
677	 * wrong causes lockups on some machines/controllers.
678	 */
679	kue_setword(sc, KUE_CMD_SET_SOFS, 1);
680#endif
681	kue_setword(sc, KUE_CMD_SET_URB_SIZE, 64);
682
683	/* load the multicast filter */
684	kue_setpromisc(ue);
685
686	usbd_xfer_set_stall(sc->sc_xfer[KUE_BULK_DT_WR]);
687
688	ifp->if_drv_flags |= IFF_DRV_RUNNING;
689	kue_start(ue);
690}
691
692static void
693kue_stop(struct usb_ether *ue)
694{
695	struct kue_softc *sc = uether_getsc(ue);
696	struct ifnet *ifp = uether_getifp(ue);
697
698	KUE_LOCK_ASSERT(sc, MA_OWNED);
699
700	ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
701
702	/*
703	 * stop all the transfers, if not already stopped:
704	 */
705	usbd_transfer_stop(sc->sc_xfer[KUE_BULK_DT_WR]);
706	usbd_transfer_stop(sc->sc_xfer[KUE_BULK_DT_RD]);
707}
708