xref: /netbsd-src/sys/dev/ic/am7990.c (revision 8b0f9554ff8762542c4defc4f70e1eb76fb508fa)
1 /*	$NetBSD: am7990.c,v 1.69 2007/08/26 22:36:35 dyoung Exp $	*/
2 
3 /*-
4  * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
9  * Simulation Facility, NASA Ames Research Center.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  * 3. All advertising materials mentioning features or use of this software
20  *    must display the following acknowledgement:
21  *	This product includes software developed by the NetBSD
22  *	Foundation, Inc. and its contributors.
23  * 4. Neither the name of The NetBSD Foundation nor the names of its
24  *    contributors may be used to endorse or promote products derived
25  *    from this software without specific prior written permission.
26  *
27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37  * POSSIBILITY OF SUCH DAMAGE.
38  */
39 
40 /*-
41  * Copyright (c) 1992, 1993
42  *	The Regents of the University of California.  All rights reserved.
43  *
44  * This code is derived from software contributed to Berkeley by
45  * Ralph Campbell and Rick Macklem.
46  *
47  * Redistribution and use in source and binary forms, with or without
48  * modification, are permitted provided that the following conditions
49  * are met:
50  * 1. Redistributions of source code must retain the above copyright
51  *    notice, this list of conditions and the following disclaimer.
52  * 2. Redistributions in binary form must reproduce the above copyright
53  *    notice, this list of conditions and the following disclaimer in the
54  *    documentation and/or other materials provided with the distribution.
55  * 3. Neither the name of the University nor the names of its contributors
56  *    may be used to endorse or promote products derived from this software
57  *    without specific prior written permission.
58  *
59  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69  * SUCH DAMAGE.
70  *
71  *	@(#)if_le.c	8.2 (Berkeley) 11/16/93
72  */
73 
74 #include <sys/cdefs.h>
75 __KERNEL_RCSID(0, "$NetBSD: am7990.c,v 1.69 2007/08/26 22:36:35 dyoung Exp $");
76 
77 #include "bpfilter.h"
78 #include "rnd.h"
79 
80 #include <sys/param.h>
81 #include <sys/systm.h>
82 #include <sys/mbuf.h>
83 #include <sys/syslog.h>
84 #include <sys/socket.h>
85 #include <sys/device.h>
86 #include <sys/malloc.h>
87 #include <sys/ioctl.h>
88 #include <sys/errno.h>
89 #if NRND > 0
90 #include <sys/rnd.h>
91 #endif
92 
93 #include <net/if.h>
94 #include <net/if_dl.h>
95 #include <net/if_ether.h>
96 #include <net/if_media.h>
97 
98 #if NBPFILTER > 0
99 #include <net/bpf.h>
100 #include <net/bpfdesc.h>
101 #endif
102 
103 #include <dev/ic/lancereg.h>
104 #include <dev/ic/lancevar.h>
105 #include <dev/ic/am7990reg.h>
106 #include <dev/ic/am7990var.h>
107 
108 static void	am7990_meminit(struct lance_softc *);
109 static void	am7990_start(struct ifnet *);
110 
111 #if defined(_KERNEL_OPT)
112 #include "opt_ddb.h"
113 #endif
114 
115 #ifdef LEDEBUG
116 static void	am7990_recv_print(struct lance_softc *, int);
117 static void	am7990_xmit_print(struct lance_softc *, int);
118 #endif
119 
120 #define	ifp	(&sc->sc_ethercom.ec_if)
121 
122 void
123 am7990_config(struct am7990_softc *sc)
124 {
125 	int mem, i;
126 
127 	sc->lsc.sc_meminit = am7990_meminit;
128 	sc->lsc.sc_start = am7990_start;
129 
130 	lance_config(&sc->lsc);
131 
132 	mem = 0;
133 	sc->lsc.sc_initaddr = mem;
134 	mem += sizeof(struct leinit);
135 	sc->lsc.sc_rmdaddr = mem;
136 	mem += sizeof(struct lermd) * sc->lsc.sc_nrbuf;
137 	sc->lsc.sc_tmdaddr = mem;
138 	mem += sizeof(struct letmd) * sc->lsc.sc_ntbuf;
139 	for (i = 0; i < sc->lsc.sc_nrbuf; i++, mem += LEBLEN)
140 		sc->lsc.sc_rbufaddr[i] = mem;
141 	for (i = 0; i < sc->lsc.sc_ntbuf; i++, mem += LEBLEN)
142 		sc->lsc.sc_tbufaddr[i] = mem;
143 #ifdef notyet
144 	if (mem > ...)
145 		panic(...);
146 #endif
147 }
148 
149 /*
150  * Set up the initialization block and the descriptor rings.
151  */
152 static void
153 am7990_meminit(struct lance_softc *sc)
154 {
155 	u_long a;
156 	int bix;
157 	struct leinit init;
158 	struct lermd rmd;
159 	struct letmd tmd;
160 	u_int8_t *myaddr;
161 
162 #if NBPFILTER > 0
163 	if (ifp->if_flags & IFF_PROMISC)
164 		init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
165 	else
166 #endif
167 		init.init_mode = LE_MODE_NORMAL;
168 	if (sc->sc_initmodemedia == 1)
169 		init.init_mode |= LE_MODE_PSEL0;
170 
171 	/*
172 	 * Update our private copy of the Ethernet address.
173 	 * We NEED the copy so we can ensure its alignment!
174 	 */
175 	memcpy(sc->sc_enaddr, CLLADDR(ifp->if_sadl), ETHER_ADDR_LEN);
176 	myaddr = sc->sc_enaddr;
177 
178 	init.init_padr[0] = (myaddr[1] << 8) | myaddr[0];
179 	init.init_padr[1] = (myaddr[3] << 8) | myaddr[2];
180 	init.init_padr[2] = (myaddr[5] << 8) | myaddr[4];
181 	lance_setladrf(&sc->sc_ethercom, init.init_ladrf);
182 
183 	sc->sc_last_rd = 0;
184 	sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
185 
186 	a = sc->sc_addr + LE_RMDADDR(sc, 0);
187 	init.init_rdra = a;
188 	init.init_rlen = (a >> 16) | ((ffs(sc->sc_nrbuf) - 1) << 13);
189 
190 	a = sc->sc_addr + LE_TMDADDR(sc, 0);
191 	init.init_tdra = a;
192 	init.init_tlen = (a >> 16) | ((ffs(sc->sc_ntbuf) - 1) << 13);
193 
194 	(*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
195 
196 	/*
197 	 * Set up receive ring descriptors.
198 	 */
199 	for (bix = 0; bix < sc->sc_nrbuf; bix++) {
200 		a = sc->sc_addr + LE_RBUFADDR(sc, bix);
201 		rmd.rmd0 = a;
202 		rmd.rmd1_hadr = a >> 16;
203 		rmd.rmd1_bits = LE_R1_OWN;
204 		rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
205 		rmd.rmd3 = 0;
206 		(*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
207 		    sizeof(rmd));
208 	}
209 
210 	/*
211 	 * Set up transmit ring descriptors.
212 	 */
213 	for (bix = 0; bix < sc->sc_ntbuf; bix++) {
214 		a = sc->sc_addr + LE_TBUFADDR(sc, bix);
215 		tmd.tmd0 = a;
216 		tmd.tmd1_hadr = a >> 16;
217 		tmd.tmd1_bits = 0;
218 		tmd.tmd2 = 0 | LE_XMD2_ONES;
219 		tmd.tmd3 = 0;
220 		(*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
221 		    sizeof(tmd));
222 	}
223 }
224 
225 static void
226 am7990_rint(struct lance_softc *sc)
227 {
228 	int bix;
229 	int rp;
230 	struct lermd rmd;
231 
232 	bix = sc->sc_last_rd;
233 
234 	/* Process all buffers with valid data. */
235 	for (;;) {
236 		rp = LE_RMDADDR(sc, bix);
237 		(*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
238 
239 		if (rmd.rmd1_bits & LE_R1_OWN)
240 			break;
241 
242 		if (rmd.rmd1_bits & LE_R1_ERR) {
243 			if (rmd.rmd1_bits & LE_R1_ENP) {
244 #ifdef LEDEBUG
245 				if ((rmd.rmd1_bits & LE_R1_OFLO) == 0) {
246 					if (rmd.rmd1_bits & LE_R1_FRAM)
247 						printf("%s: framing error\n",
248 						    sc->sc_dev.dv_xname);
249 					if (rmd.rmd1_bits & LE_R1_CRC)
250 						printf("%s: crc mismatch\n",
251 						    sc->sc_dev.dv_xname);
252 				}
253 #endif
254 			} else {
255 				if (rmd.rmd1_bits & LE_R1_OFLO)
256 					printf("%s: overflow\n",
257 					    sc->sc_dev.dv_xname);
258 			}
259 			if (rmd.rmd1_bits & LE_R1_BUFF)
260 				printf("%s: receive buffer error\n",
261 				    sc->sc_dev.dv_xname);
262 			ifp->if_ierrors++;
263 		} else if ((rmd.rmd1_bits & (LE_R1_STP | LE_R1_ENP)) !=
264 		    (LE_R1_STP | LE_R1_ENP)) {
265 			printf("%s: dropping chained buffer\n",
266 			    sc->sc_dev.dv_xname);
267 			ifp->if_ierrors++;
268 		} else {
269 #ifdef LEDEBUG
270 			if (sc->sc_debug > 1)
271 				am7990_recv_print(sc, sc->sc_last_rd);
272 #endif
273 			lance_read(sc, LE_RBUFADDR(sc, bix),
274 				   (int)rmd.rmd3 - 4);
275 		}
276 
277 		rmd.rmd1_bits = LE_R1_OWN;
278 		rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
279 		rmd.rmd3 = 0;
280 		(*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
281 
282 #ifdef LEDEBUG
283 		if (sc->sc_debug)
284 			printf("sc->sc_last_rd = %x, rmd: "
285 			       "ladr %04x, hadr %02x, flags %02x, "
286 			       "bcnt %04x, mcnt %04x\n",
287 				sc->sc_last_rd,
288 				rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits,
289 				rmd.rmd2, rmd.rmd3);
290 #endif
291 
292 		if (++bix == sc->sc_nrbuf)
293 			bix = 0;
294 	}
295 
296 	sc->sc_last_rd = bix;
297 }
298 
299 static void
300 am7990_tint(struct lance_softc *sc)
301 {
302 	int bix;
303 	struct letmd tmd;
304 
305 	bix = sc->sc_first_td;
306 
307 	for (;;) {
308 		if (sc->sc_no_td <= 0)
309 			break;
310 
311 		(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
312 		    sizeof(tmd));
313 
314 #ifdef LEDEBUG
315 		if (sc->sc_debug)
316 			printf("trans tmd: "
317 			    "ladr %04x, hadr %02x, flags %02x, "
318 			    "bcnt %04x, mcnt %04x\n",
319 			    tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits,
320 			    tmd.tmd2, tmd.tmd3);
321 #endif
322 
323 		if (tmd.tmd1_bits & LE_T1_OWN)
324 			break;
325 
326 		ifp->if_flags &= ~IFF_OACTIVE;
327 
328 		if (tmd.tmd1_bits & LE_T1_ERR) {
329 			if (tmd.tmd3 & LE_T3_BUFF)
330 				printf("%s: transmit buffer error\n",
331 				    sc->sc_dev.dv_xname);
332 			else if (tmd.tmd3 & LE_T3_UFLO)
333 				printf("%s: underflow\n", sc->sc_dev.dv_xname);
334 			if (tmd.tmd3 & (LE_T3_BUFF | LE_T3_UFLO)) {
335 				lance_reset(sc);
336 				return;
337 			}
338 			if (tmd.tmd3 & LE_T3_LCAR) {
339 				sc->sc_havecarrier = 0;
340 				if (sc->sc_nocarrier)
341 					(*sc->sc_nocarrier)(sc);
342 				else
343 					printf("%s: lost carrier\n",
344 					    sc->sc_dev.dv_xname);
345 			}
346 			if (tmd.tmd3 & LE_T3_LCOL)
347 				ifp->if_collisions++;
348 			if (tmd.tmd3 & LE_T3_RTRY) {
349 #ifdef LEDEBUG
350 				printf("%s: excessive collisions, tdr %d\n",
351 				    sc->sc_dev.dv_xname,
352 				    tmd.tmd3 & LE_T3_TDR_MASK);
353 #endif
354 				ifp->if_collisions += 16;
355 			}
356 			ifp->if_oerrors++;
357 		} else {
358 			if (tmd.tmd1_bits & LE_T1_ONE)
359 				ifp->if_collisions++;
360 			else if (tmd.tmd1_bits & LE_T1_MORE)
361 				/* Real number is unknown. */
362 				ifp->if_collisions += 2;
363 			ifp->if_opackets++;
364 		}
365 
366 		if (++bix == sc->sc_ntbuf)
367 			bix = 0;
368 
369 		--sc->sc_no_td;
370 	}
371 
372 	sc->sc_first_td = bix;
373 
374 	am7990_start(ifp);
375 
376 	if (sc->sc_no_td == 0)
377 		ifp->if_timer = 0;
378 }
379 
380 /*
381  * Controller interrupt.
382  */
383 int
384 am7990_intr(void *arg)
385 {
386 	struct lance_softc *sc = arg;
387 	u_int16_t isr;
388 
389 	isr = (*sc->sc_rdcsr)(sc, LE_CSR0) | sc->sc_saved_csr0;
390 	sc->sc_saved_csr0 = 0;
391 #if defined(LEDEBUG) && LEDEBUG > 1
392 	if (sc->sc_debug)
393 		printf("%s: am7990_intr entering with isr=%04x\n",
394 		    sc->sc_dev.dv_xname, isr);
395 #endif
396 	if ((isr & LE_C0_INTR) == 0)
397 		return (0);
398 
399 #ifdef __vax__
400 	/*
401 	 * DEC needs this write order to the registers, don't know
402 	 * the results on other arch's.  Ragge 991029
403 	 */
404 	isr &= ~LE_C0_INEA;
405 	(*sc->sc_wrcsr)(sc, LE_CSR0, isr);
406 	(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA);
407 #else
408 	(*sc->sc_wrcsr)(sc, LE_CSR0,
409 	    isr & (LE_C0_INEA | LE_C0_BABL | LE_C0_MISS | LE_C0_MERR |
410 		   LE_C0_RINT | LE_C0_TINT | LE_C0_IDON));
411 #endif
412 	if (isr & LE_C0_ERR) {
413 		if (isr & LE_C0_BABL) {
414 #ifdef LEDEBUG
415 			printf("%s: babble\n", sc->sc_dev.dv_xname);
416 #endif
417 			ifp->if_oerrors++;
418 		}
419 #if 0
420 		if (isr & LE_C0_CERR) {
421 			printf("%s: collision error\n", sc->sc_dev.dv_xname);
422 			ifp->if_collisions++;
423 		}
424 #endif
425 		if (isr & LE_C0_MISS) {
426 #ifdef LEDEBUG
427 			printf("%s: missed packet\n", sc->sc_dev.dv_xname);
428 #endif
429 			ifp->if_ierrors++;
430 		}
431 		if (isr & LE_C0_MERR) {
432 			printf("%s: memory error\n", sc->sc_dev.dv_xname);
433 			lance_reset(sc);
434 			return (1);
435 		}
436 	}
437 
438 	if ((isr & LE_C0_RXON) == 0) {
439 		printf("%s: receiver disabled\n", sc->sc_dev.dv_xname);
440 		ifp->if_ierrors++;
441 		lance_reset(sc);
442 		return (1);
443 	}
444 	if ((isr & LE_C0_TXON) == 0) {
445 		printf("%s: transmitter disabled\n", sc->sc_dev.dv_xname);
446 		ifp->if_oerrors++;
447 		lance_reset(sc);
448 		return (1);
449 	}
450 
451 	/*
452 	 * Pretend we have carrier; if we don't this will be cleared
453 	 * shortly.
454 	 */
455 	sc->sc_havecarrier = 1;
456 
457 	if (isr & LE_C0_RINT)
458 		am7990_rint(sc);
459 	if (isr & LE_C0_TINT)
460 		am7990_tint(sc);
461 
462 #if NRND > 0
463 	rnd_add_uint32(&sc->rnd_source, isr);
464 #endif
465 
466 	return (1);
467 }
468 
469 #undef ifp
470 
471 /*
472  * Setup output on interface.
473  * Get another datagram to send off of the interface queue, and map it to the
474  * interface before starting the output.
475  * Called only at splnet or interrupt level.
476  */
477 static void
478 am7990_start(struct ifnet *ifp)
479 {
480 	struct lance_softc *sc = ifp->if_softc;
481 	int bix;
482 	struct mbuf *m;
483 	struct letmd tmd;
484 	int rp;
485 	int len;
486 
487 	if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
488 		return;
489 
490 	bix = sc->sc_last_td;
491 
492 	for (;;) {
493 		rp = LE_TMDADDR(sc, bix);
494 		(*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
495 
496 		if (tmd.tmd1_bits & LE_T1_OWN) {
497 			ifp->if_flags |= IFF_OACTIVE;
498 			printf("missing buffer, no_td = %d, last_td = %d\n",
499 			    sc->sc_no_td, sc->sc_last_td);
500 		}
501 
502 		IFQ_DEQUEUE(&ifp->if_snd, m);
503 		if (m == 0)
504 			break;
505 
506 #if NBPFILTER > 0
507 		/*
508 		 * If BPF is listening on this interface, let it see the packet
509 		 * before we commit it to the wire.
510 		 */
511 		if (ifp->if_bpf)
512 			bpf_mtap(ifp->if_bpf, m);
513 #endif
514 
515 		/*
516 		 * Copy the mbuf chain into the transmit buffer.
517 		 */
518 		len = lance_put(sc, LE_TBUFADDR(sc, bix), m);
519 
520 #ifdef LEDEBUG
521 		if (len > ETHERMTU + sizeof(struct ether_header))
522 			printf("packet length %d\n", len);
523 #endif
524 
525 		ifp->if_timer = 5;
526 
527 		/*
528 		 * Init transmit registers, and set transmit start flag.
529 		 */
530 		tmd.tmd1_bits = LE_T1_OWN | LE_T1_STP | LE_T1_ENP;
531 		tmd.tmd2 = -len | LE_XMD2_ONES;
532 		tmd.tmd3 = 0;
533 
534 		(*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
535 
536 #ifdef LEDEBUG
537 		if (sc->sc_debug > 1)
538 			am7990_xmit_print(sc, sc->sc_last_td);
539 #endif
540 
541 		(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
542 
543 		if (++bix == sc->sc_ntbuf)
544 			bix = 0;
545 
546 		if (++sc->sc_no_td == sc->sc_ntbuf) {
547 			ifp->if_flags |= IFF_OACTIVE;
548 			break;
549 		}
550 
551 	}
552 
553 	sc->sc_last_td = bix;
554 }
555 
556 #ifdef LEDEBUG
557 static void
558 am7990_recv_print(struct lance_softc *sc, int no)
559 {
560 	struct lermd rmd;
561 	u_int16_t len;
562 	struct ether_header eh;
563 
564 	(*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
565 	len = rmd.rmd3;
566 	printf("%s: receive buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
567 	    len);
568 	printf("%s: status %04x\n", sc->sc_dev.dv_xname,
569 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
570 	printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
571 	    sc->sc_dev.dv_xname,
572 	    rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits, rmd.rmd2, rmd.rmd3);
573 	if (len >= sizeof(eh)) {
574 		(*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
575 		printf("%s: dst %s", sc->sc_dev.dv_xname,
576 			ether_sprintf(eh.ether_dhost));
577 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
578 			ntohs(eh.ether_type));
579 	}
580 }
581 
582 static void
583 am7990_xmit_print(struct lance_softc *sc, int no)
584 {
585 	struct letmd tmd;
586 	u_int16_t len;
587 	struct ether_header eh;
588 
589 	(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
590 	len = -tmd.tmd2;
591 	printf("%s: transmit buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
592 	    len);
593 	printf("%s: status %04x\n", sc->sc_dev.dv_xname,
594 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
595 	printf("%s: ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
596 	    sc->sc_dev.dv_xname,
597 	    tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits, tmd.tmd2, tmd.tmd3);
598 	if (len >= sizeof(eh)) {
599 		(*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
600 		printf("%s: dst %s", sc->sc_dev.dv_xname,
601 			ether_sprintf(eh.ether_dhost));
602 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
603 		    ntohs(eh.ether_type));
604 	}
605 }
606 #endif /* LEDEBUG */
607