1/*-
2 * Copyright (c) 1997, 1998, 1999, 2000
3 *	Bill Paul <wpaul@ee.columbia.edu>.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36/*
37 * CATC USB-EL1210A USB to ethernet driver. Used in the CATC Netmate
38 * adapters and others.
39 *
40 * Written by Bill Paul <wpaul@ee.columbia.edu>
41 * Electrical Engineering Department
42 * Columbia University, New York City
43 */
44
45/*
46 * The CATC USB-EL1210A provides USB ethernet support at 10Mbps. The
47 * RX filter uses a 512-bit multicast hash table, single perfect entry
48 * for the station address, and promiscuous mode. Unlike the ADMtek
49 * and KLSI chips, the CATC ASIC supports read and write combining
50 * mode where multiple packets can be transferred using a single bulk
51 * transaction, which helps performance a great deal.
52 */
53
54#include <sys/stdint.h>
55#include <sys/stddef.h>
56#include <sys/param.h>
57#include <sys/queue.h>
58#include <sys/types.h>
59#include <sys/systm.h>
60#include <sys/socket.h>
61#include <sys/kernel.h>
62#include <sys/bus.h>
63#include <sys/module.h>
64#include <sys/lock.h>
65#include <sys/mutex.h>
66#include <sys/condvar.h>
67#include <sys/sysctl.h>
68#include <sys/sx.h>
69#include <sys/unistd.h>
70#include <sys/callout.h>
71#include <sys/malloc.h>
72#include <sys/priv.h>
73
74#include <net/if.h>
75#include <net/if_var.h>
76
77#include <dev/usb/usb.h>
78#include <dev/usb/usbdi.h>
79#include <dev/usb/usbdi_util.h>
80#include "usbdevs.h"
81
82#define	USB_DEBUG_VAR cue_debug
83#include <dev/usb/usb_debug.h>
84#include <dev/usb/usb_process.h>
85
86#include <dev/usb/net/usb_ethernet.h>
87#include <dev/usb/net/if_cuereg.h>
88
89/*
90 * Various supported device vendors/products.
91 */
92
93/* Belkin F5U111 adapter covered by NETMATE entry */
94
95static const STRUCT_USB_HOST_ID cue_devs[] = {
96#define	CUE_DEV(v,p) { USB_VP(USB_VENDOR_##v, USB_PRODUCT_##v##_##p) }
97	CUE_DEV(CATC, NETMATE),
98	CUE_DEV(CATC, NETMATE2),
99	CUE_DEV(SMARTBRIDGES, SMARTLINK),
100#undef CUE_DEV
101};
102
103/* prototypes */
104
105static device_probe_t cue_probe;
106static device_attach_t cue_attach;
107static device_detach_t cue_detach;
108
109static usb_callback_t cue_bulk_read_callback;
110static usb_callback_t cue_bulk_write_callback;
111
112static uether_fn_t cue_attach_post;
113static uether_fn_t cue_init;
114static uether_fn_t cue_stop;
115static uether_fn_t cue_start;
116static uether_fn_t cue_tick;
117static uether_fn_t cue_setmulti;
118static uether_fn_t cue_setpromisc;
119
120static uint8_t	cue_csr_read_1(struct cue_softc *, uint16_t);
121static uint16_t	cue_csr_read_2(struct cue_softc *, uint8_t);
122static int	cue_csr_write_1(struct cue_softc *, uint16_t, uint16_t);
123static int	cue_mem(struct cue_softc *, uint8_t, uint16_t, void *, int);
124static int	cue_getmac(struct cue_softc *, void *);
125static uint32_t	cue_mchash(const uint8_t *);
126static void	cue_reset(struct cue_softc *);
127
128#ifdef USB_DEBUG
129static int cue_debug = 0;
130
131static SYSCTL_NODE(_hw_usb, OID_AUTO, cue, CTLFLAG_RW, 0, "USB cue");
132SYSCTL_INT(_hw_usb_cue, OID_AUTO, debug, CTLFLAG_RWTUN, &cue_debug, 0,
133    "Debug level");
134#endif
135
136static const struct usb_config cue_config[CUE_N_TRANSFER] = {
137
138	[CUE_BULK_DT_WR] = {
139		.type = UE_BULK,
140		.endpoint = UE_ADDR_ANY,
141		.direction = UE_DIR_OUT,
142		.bufsize = (MCLBYTES + 2),
143		.flags = {.pipe_bof = 1,},
144		.callback = cue_bulk_write_callback,
145		.timeout = 10000,	/* 10 seconds */
146	},
147
148	[CUE_BULK_DT_RD] = {
149		.type = UE_BULK,
150		.endpoint = UE_ADDR_ANY,
151		.direction = UE_DIR_IN,
152		.bufsize = (MCLBYTES + 2),
153		.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
154		.callback = cue_bulk_read_callback,
155	},
156};
157
158static device_method_t cue_methods[] = {
159	/* Device interface */
160	DEVMETHOD(device_probe, cue_probe),
161	DEVMETHOD(device_attach, cue_attach),
162	DEVMETHOD(device_detach, cue_detach),
163
164	DEVMETHOD_END
165};
166
167static driver_t cue_driver = {
168	.name = "cue",
169	.methods = cue_methods,
170	.size = sizeof(struct cue_softc),
171};
172
173static devclass_t cue_devclass;
174
175DRIVER_MODULE(cue, uhub, cue_driver, cue_devclass, NULL, 0);
176MODULE_DEPEND(cue, uether, 1, 1, 1);
177MODULE_DEPEND(cue, usb, 1, 1, 1);
178MODULE_DEPEND(cue, ether, 1, 1, 1);
179MODULE_VERSION(cue, 1);
180USB_PNP_HOST_INFO(cue_devs);
181
182static const struct usb_ether_methods cue_ue_methods = {
183	.ue_attach_post = cue_attach_post,
184	.ue_start = cue_start,
185	.ue_init = cue_init,
186	.ue_stop = cue_stop,
187	.ue_tick = cue_tick,
188	.ue_setmulti = cue_setmulti,
189	.ue_setpromisc = cue_setpromisc,
190};
191
192#define	CUE_SETBIT(sc, reg, x)				\
193	cue_csr_write_1(sc, reg, cue_csr_read_1(sc, reg) | (x))
194
195#define	CUE_CLRBIT(sc, reg, x)				\
196	cue_csr_write_1(sc, reg, cue_csr_read_1(sc, reg) & ~(x))
197
198static uint8_t
199cue_csr_read_1(struct cue_softc *sc, uint16_t reg)
200{
201	struct usb_device_request req;
202	uint8_t val;
203
204	req.bmRequestType = UT_READ_VENDOR_DEVICE;
205	req.bRequest = CUE_CMD_READREG;
206	USETW(req.wValue, 0);
207	USETW(req.wIndex, reg);
208	USETW(req.wLength, 1);
209
210	if (uether_do_request(&sc->sc_ue, &req, &val, 1000)) {
211		/* ignore any errors */
212	}
213	return (val);
214}
215
216static uint16_t
217cue_csr_read_2(struct cue_softc *sc, uint8_t reg)
218{
219	struct usb_device_request req;
220	uint16_t val;
221
222	req.bmRequestType = UT_READ_VENDOR_DEVICE;
223	req.bRequest = CUE_CMD_READREG;
224	USETW(req.wValue, 0);
225	USETW(req.wIndex, reg);
226	USETW(req.wLength, 2);
227
228	(void)uether_do_request(&sc->sc_ue, &req, &val, 1000);
229	return (le16toh(val));
230}
231
232static int
233cue_csr_write_1(struct cue_softc *sc, uint16_t reg, uint16_t val)
234{
235	struct usb_device_request req;
236
237	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
238	req.bRequest = CUE_CMD_WRITEREG;
239	USETW(req.wValue, val);
240	USETW(req.wIndex, reg);
241	USETW(req.wLength, 0);
242
243	return (uether_do_request(&sc->sc_ue, &req, NULL, 1000));
244}
245
246static int
247cue_mem(struct cue_softc *sc, uint8_t cmd, uint16_t addr, void *buf, int len)
248{
249	struct usb_device_request req;
250
251	if (cmd == CUE_CMD_READSRAM)
252		req.bmRequestType = UT_READ_VENDOR_DEVICE;
253	else
254		req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
255	req.bRequest = cmd;
256	USETW(req.wValue, 0);
257	USETW(req.wIndex, addr);
258	USETW(req.wLength, len);
259
260	return (uether_do_request(&sc->sc_ue, &req, buf, 1000));
261}
262
263static int
264cue_getmac(struct cue_softc *sc, void *buf)
265{
266	struct usb_device_request req;
267
268	req.bmRequestType = UT_READ_VENDOR_DEVICE;
269	req.bRequest = CUE_CMD_GET_MACADDR;
270	USETW(req.wValue, 0);
271	USETW(req.wIndex, 0);
272	USETW(req.wLength, ETHER_ADDR_LEN);
273
274	return (uether_do_request(&sc->sc_ue, &req, buf, 1000));
275}
276
277#define	CUE_BITS 9
278
279static uint32_t
280cue_mchash(const uint8_t *addr)
281{
282	uint32_t crc;
283
284	/* Compute CRC for the address value. */
285	crc = ether_crc32_le(addr, ETHER_ADDR_LEN);
286
287	return (crc & ((1 << CUE_BITS) - 1));
288}
289
290static void
291cue_setpromisc(struct usb_ether *ue)
292{
293	struct cue_softc *sc = uether_getsc(ue);
294	struct ifnet *ifp = uether_getifp(ue);
295
296	CUE_LOCK_ASSERT(sc, MA_OWNED);
297
298	/* if we want promiscuous mode, set the allframes bit */
299	if (ifp->if_flags & IFF_PROMISC)
300		CUE_SETBIT(sc, CUE_ETHCTL, CUE_ETHCTL_PROMISC);
301	else
302		CUE_CLRBIT(sc, CUE_ETHCTL, CUE_ETHCTL_PROMISC);
303
304	/* write multicast hash-bits */
305	cue_setmulti(ue);
306}
307
308static void
309cue_setmulti(struct usb_ether *ue)
310{
311	struct cue_softc *sc = uether_getsc(ue);
312	struct ifnet *ifp = uether_getifp(ue);
313	struct ifmultiaddr *ifma;
314	uint32_t h = 0, i;
315	uint8_t hashtbl[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
316
317	CUE_LOCK_ASSERT(sc, MA_OWNED);
318
319	if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
320		for (i = 0; i < 8; i++)
321			hashtbl[i] = 0xff;
322		cue_mem(sc, CUE_CMD_WRITESRAM, CUE_MCAST_TABLE_ADDR,
323		    &hashtbl, 8);
324		return;
325	}
326
327	/* now program new ones */
328	if_maddr_rlock(ifp);
329	TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
330	{
331		if (ifma->ifma_addr->sa_family != AF_LINK)
332			continue;
333		h = cue_mchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
334		hashtbl[h >> 3] |= 1 << (h & 0x7);
335	}
336	if_maddr_runlock(ifp);
337
338	/*
339	 * Also include the broadcast address in the filter
340	 * so we can receive broadcast frames.
341 	 */
342	if (ifp->if_flags & IFF_BROADCAST) {
343		h = cue_mchash(ifp->if_broadcastaddr);
344		hashtbl[h >> 3] |= 1 << (h & 0x7);
345	}
346
347	cue_mem(sc, CUE_CMD_WRITESRAM, CUE_MCAST_TABLE_ADDR, &hashtbl, 8);
348}
349
350static void
351cue_reset(struct cue_softc *sc)
352{
353	struct usb_device_request req;
354
355	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
356	req.bRequest = CUE_CMD_RESET;
357	USETW(req.wValue, 0);
358	USETW(req.wIndex, 0);
359	USETW(req.wLength, 0);
360
361	if (uether_do_request(&sc->sc_ue, &req, NULL, 1000)) {
362		/* ignore any errors */
363	}
364
365	/*
366	 * wait a little while for the chip to get its brains in order:
367	 */
368	uether_pause(&sc->sc_ue, hz / 100);
369}
370
371static void
372cue_attach_post(struct usb_ether *ue)
373{
374	struct cue_softc *sc = uether_getsc(ue);
375
376	cue_getmac(sc, ue->ue_eaddr);
377}
378
379static int
380cue_probe(device_t dev)
381{
382	struct usb_attach_arg *uaa = device_get_ivars(dev);
383
384	if (uaa->usb_mode != USB_MODE_HOST)
385		return (ENXIO);
386	if (uaa->info.bConfigIndex != CUE_CONFIG_IDX)
387		return (ENXIO);
388	if (uaa->info.bIfaceIndex != CUE_IFACE_IDX)
389		return (ENXIO);
390
391	return (usbd_lookup_id_by_uaa(cue_devs, sizeof(cue_devs), uaa));
392}
393
394/*
395 * Attach the interface. Allocate softc structures, do ifmedia
396 * setup and ethernet/BPF attach.
397 */
398static int
399cue_attach(device_t dev)
400{
401	struct usb_attach_arg *uaa = device_get_ivars(dev);
402	struct cue_softc *sc = device_get_softc(dev);
403	struct usb_ether *ue = &sc->sc_ue;
404	uint8_t iface_index;
405	int error;
406
407	device_set_usb_desc(dev);
408	mtx_init(&sc->sc_mtx, device_get_nameunit(dev), NULL, MTX_DEF);
409
410	iface_index = CUE_IFACE_IDX;
411	error = usbd_transfer_setup(uaa->device, &iface_index,
412	    sc->sc_xfer, cue_config, CUE_N_TRANSFER, sc, &sc->sc_mtx);
413	if (error) {
414		device_printf(dev, "allocating USB transfers failed\n");
415		goto detach;
416	}
417
418	ue->ue_sc = sc;
419	ue->ue_dev = dev;
420	ue->ue_udev = uaa->device;
421	ue->ue_mtx = &sc->sc_mtx;
422	ue->ue_methods = &cue_ue_methods;
423
424	error = uether_ifattach(ue);
425	if (error) {
426		device_printf(dev, "could not attach interface\n");
427		goto detach;
428	}
429	return (0);			/* success */
430
431detach:
432	cue_detach(dev);
433	return (ENXIO);			/* failure */
434}
435
436static int
437cue_detach(device_t dev)
438{
439	struct cue_softc *sc = device_get_softc(dev);
440	struct usb_ether *ue = &sc->sc_ue;
441
442	usbd_transfer_unsetup(sc->sc_xfer, CUE_N_TRANSFER);
443	uether_ifdetach(ue);
444	mtx_destroy(&sc->sc_mtx);
445
446	return (0);
447}
448
449static void
450cue_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error)
451{
452	struct cue_softc *sc = usbd_xfer_softc(xfer);
453	struct usb_ether *ue = &sc->sc_ue;
454	struct ifnet *ifp = uether_getifp(ue);
455	struct usb_page_cache *pc;
456	uint8_t buf[2];
457	int len;
458	int actlen;
459
460	usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
461
462	switch (USB_GET_STATE(xfer)) {
463	case USB_ST_TRANSFERRED:
464
465		if (actlen <= (int)(2 + sizeof(struct ether_header))) {
466			if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
467			goto tr_setup;
468		}
469		pc = usbd_xfer_get_frame(xfer, 0);
470		usbd_copy_out(pc, 0, buf, 2);
471		actlen -= 2;
472		len = buf[0] | (buf[1] << 8);
473		len = min(actlen, len);
474
475		uether_rxbuf(ue, pc, 2, len);
476		/* FALLTHROUGH */
477	case USB_ST_SETUP:
478tr_setup:
479		usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
480		usbd_transfer_submit(xfer);
481		uether_rxflush(ue);
482		return;
483
484	default:			/* Error */
485		DPRINTF("bulk read error, %s\n",
486		    usbd_errstr(error));
487
488		if (error != USB_ERR_CANCELLED) {
489			/* try to clear stall first */
490			usbd_xfer_set_stall(xfer);
491			goto tr_setup;
492		}
493		return;
494
495	}
496}
497
498static void
499cue_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error)
500{
501	struct cue_softc *sc = usbd_xfer_softc(xfer);
502	struct ifnet *ifp = uether_getifp(&sc->sc_ue);
503	struct usb_page_cache *pc;
504	struct mbuf *m;
505	uint8_t buf[2];
506
507	switch (USB_GET_STATE(xfer)) {
508	case USB_ST_TRANSFERRED:
509		DPRINTFN(11, "transfer complete\n");
510		if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
511
512		/* FALLTHROUGH */
513	case USB_ST_SETUP:
514tr_setup:
515		IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
516
517		if (m == NULL)
518			return;
519		if (m->m_pkthdr.len > MCLBYTES)
520			m->m_pkthdr.len = MCLBYTES;
521		usbd_xfer_set_frame_len(xfer, 0, (m->m_pkthdr.len + 2));
522
523		/* the first two bytes are the frame length */
524
525		buf[0] = (uint8_t)(m->m_pkthdr.len);
526		buf[1] = (uint8_t)(m->m_pkthdr.len >> 8);
527
528		pc = usbd_xfer_get_frame(xfer, 0);
529		usbd_copy_in(pc, 0, buf, 2);
530		usbd_m_copy_in(pc, 2, m, 0, m->m_pkthdr.len);
531
532		/*
533		 * If there's a BPF listener, bounce a copy of this frame
534		 * to him.
535		 */
536		BPF_MTAP(ifp, m);
537
538		m_freem(m);
539
540		usbd_transfer_submit(xfer);
541
542		return;
543
544	default:			/* Error */
545		DPRINTFN(11, "transfer error, %s\n",
546		    usbd_errstr(error));
547
548		if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
549
550		if (error != USB_ERR_CANCELLED) {
551			/* try to clear stall first */
552			usbd_xfer_set_stall(xfer);
553			goto tr_setup;
554		}
555		return;
556	}
557}
558
559static void
560cue_tick(struct usb_ether *ue)
561{
562	struct cue_softc *sc = uether_getsc(ue);
563	struct ifnet *ifp = uether_getifp(ue);
564
565	CUE_LOCK_ASSERT(sc, MA_OWNED);
566
567	if_inc_counter(ifp, IFCOUNTER_COLLISIONS, cue_csr_read_2(sc, CUE_TX_SINGLECOLL));
568	if_inc_counter(ifp, IFCOUNTER_COLLISIONS, cue_csr_read_2(sc, CUE_TX_MULTICOLL));
569	if_inc_counter(ifp, IFCOUNTER_COLLISIONS, cue_csr_read_2(sc, CUE_TX_EXCESSCOLL));
570
571	if (cue_csr_read_2(sc, CUE_RX_FRAMEERR))
572		if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
573}
574
575static void
576cue_start(struct usb_ether *ue)
577{
578	struct cue_softc *sc = uether_getsc(ue);
579
580	/*
581	 * start the USB transfers, if not already started:
582	 */
583	usbd_transfer_start(sc->sc_xfer[CUE_BULK_DT_RD]);
584	usbd_transfer_start(sc->sc_xfer[CUE_BULK_DT_WR]);
585}
586
587static void
588cue_init(struct usb_ether *ue)
589{
590	struct cue_softc *sc = uether_getsc(ue);
591	struct ifnet *ifp = uether_getifp(ue);
592	int i;
593
594	CUE_LOCK_ASSERT(sc, MA_OWNED);
595
596	/*
597	 * Cancel pending I/O and free all RX/TX buffers.
598	 */
599	cue_stop(ue);
600#if 0
601	cue_reset(sc);
602#endif
603	/* Set MAC address */
604	for (i = 0; i < ETHER_ADDR_LEN; i++)
605		cue_csr_write_1(sc, CUE_PAR0 - i, IF_LLADDR(ifp)[i]);
606
607	/* Enable RX logic. */
608	cue_csr_write_1(sc, CUE_ETHCTL, CUE_ETHCTL_RX_ON | CUE_ETHCTL_MCAST_ON);
609
610	/* Load the multicast filter */
611	cue_setpromisc(ue);
612
613	/*
614	 * Set the number of RX and TX buffers that we want
615	 * to reserve inside the ASIC.
616	 */
617	cue_csr_write_1(sc, CUE_RX_BUFPKTS, CUE_RX_FRAMES);
618	cue_csr_write_1(sc, CUE_TX_BUFPKTS, CUE_TX_FRAMES);
619
620	/* Set advanced operation modes. */
621	cue_csr_write_1(sc, CUE_ADVANCED_OPMODES,
622	    CUE_AOP_EMBED_RXLEN | 0x01);/* 1 wait state */
623
624	/* Program the LED operation. */
625	cue_csr_write_1(sc, CUE_LEDCTL, CUE_LEDCTL_FOLLOW_LINK);
626
627	usbd_xfer_set_stall(sc->sc_xfer[CUE_BULK_DT_WR]);
628
629	ifp->if_drv_flags |= IFF_DRV_RUNNING;
630	cue_start(ue);
631}
632
633/*
634 * Stop the adapter and free any mbufs allocated to the
635 * RX and TX lists.
636 */
637static void
638cue_stop(struct usb_ether *ue)
639{
640	struct cue_softc *sc = uether_getsc(ue);
641	struct ifnet *ifp = uether_getifp(ue);
642
643	CUE_LOCK_ASSERT(sc, MA_OWNED);
644
645	ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
646
647	/*
648	 * stop all the transfers, if not already stopped:
649	 */
650	usbd_transfer_stop(sc->sc_xfer[CUE_BULK_DT_WR]);
651	usbd_transfer_stop(sc->sc_xfer[CUE_BULK_DT_RD]);
652
653	cue_csr_write_1(sc, CUE_ETHCTL, 0);
654	cue_reset(sc);
655}
656