1 /* $OpenBSD: ne2000.c,v 1.14 2004/01/07 00:34:25 fgsch Exp $ */
2 /* $NetBSD: ne2000.c,v 1.12 1998/06/10 01:15:50 thorpej Exp $ */
3
4 /*-
5 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
10 * NASA Ames Research Center.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the NetBSD
23 * Foundation, Inc. and its contributors.
24 * 4. Neither the name of The NetBSD Foundation nor the names of its
25 * contributors may be used to endorse or promote products derived
26 * from this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGE.
39 */
40
41 /*
42 * Device driver for National Semiconductor DS8390/WD83C690 based ethernet
43 * adapters.
44 *
45 * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved.
46 *
47 * Copyright (C) 1993, David Greenman. This software may be used, modified,
48 * copied, distributed, and sold, in both source and binary form provided that
49 * the above copyright and these terms are retained. Under no circumstances is
50 * the author responsible for the proper functioning of this software, nor does
51 * the author assume any responsibility for damages incurred with its use.
52 */
53
54 /*
55 * Common code shared by all NE2000-compatible Ethernet interfaces.
56 */
57
58 #include <sys/param.h>
59 #include <sys/systm.h>
60 #include <sys/device.h>
61 #include <sys/socket.h>
62 #include <sys/mbuf.h>
63 #include <sys/syslog.h>
64
65 #include <net/if.h>
66 #include <net/if_dl.h>
67 #include <net/if_types.h>
68 #include <net/if_media.h>
69
70 #ifdef __NetBSD__
71 #include <net/if_ether.h>
72 #else
73 #include <netinet/in.h>
74 #include <netinet/if_ether.h>
75 #endif
76
77 #include <machine/bus.h>
78
79 #ifndef __BUS_SPACE_HAS_STREAM_METHODS
80 #define bus_space_write_stream_2 bus_space_write_2
81 #define bus_space_write_multi_stream_2 bus_space_write_multi_2
82 #define bus_space_read_multi_stream_2 bus_space_read_multi_2
83 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */
84
85 #include <dev/ic/dp8390reg.h>
86 #include <dev/ic/dp8390var.h>
87
88 #include <dev/ic/ne2000reg.h>
89 #include <dev/ic/ne2000var.h>
90
91 int ne2000_write_mbuf(struct dp8390_softc *, struct mbuf *, int);
92 int ne2000_ring_copy(struct dp8390_softc *, int, caddr_t, u_short);
93 void ne2000_read_hdr(struct dp8390_softc *, int, struct dp8390_ring *);
94 int ne2000_test_mem(struct dp8390_softc *);
95
96 void ne2000_writemem(bus_space_tag_t, bus_space_handle_t,
97 bus_space_tag_t, bus_space_handle_t, u_int8_t *, int, size_t, int);
98 void ne2000_readmem(bus_space_tag_t, bus_space_handle_t,
99 bus_space_tag_t, bus_space_handle_t, int, u_int8_t *, size_t, int);
100
101 struct cfdriver ne_cd = {
102 NULL, "ne", DV_IFNET
103 };
104
105 int
ne2000_attach(nsc,myea)106 ne2000_attach(nsc, myea)
107 struct ne2000_softc *nsc;
108 u_int8_t *myea;
109 {
110 struct dp8390_softc *dsc = &nsc->sc_dp8390;
111 bus_space_tag_t nict = dsc->sc_regt;
112 bus_space_handle_t nich = dsc->sc_regh;
113 bus_space_tag_t asict = nsc->sc_asict;
114 bus_space_handle_t asich = nsc->sc_asich;
115 u_int8_t romdata[16];
116 int memsize, i, useword;
117
118 /*
119 * Detect it again unless caller specified it; this gives us
120 * the memory size.
121 */
122 if (nsc->sc_type == 0) {
123 nsc->sc_type = ne2000_detect(nsc);
124 if (nsc->sc_type == 0) {
125 printf("%s: where did the card go?\n",
126 dsc->sc_dev.dv_xname);
127 return (1);
128 }
129 }
130
131 useword = NE2000_USE_WORD(nsc);
132
133 dsc->cr_proto = ED_CR_RD2;
134 if (nsc->sc_type == NE2000_TYPE_AX88190) {
135 dsc->rcr_proto = ED_RCR_INTT;
136 dsc->sc_flags |= DP8390_DO_AX88190_WORKAROUND;
137 } else
138 dsc->rcr_proto = 0;
139
140 /*
141 * DCR gets:
142 *
143 * FIFO threshold to 8, No auto-init Remote DMA,
144 * byte order=80x86.
145 *
146 * NE1000 gets byte-wide DMA, NE2000 gets word-wide DMA.
147 */
148 dsc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS | (useword ? ED_DCR_WTS : 0);
149
150 dsc->test_mem = ne2000_test_mem;
151 dsc->ring_copy = ne2000_ring_copy;
152 dsc->write_mbuf = ne2000_write_mbuf;
153 dsc->read_hdr = ne2000_read_hdr;
154
155 /* Registers are linear. */
156 for (i = 0; i < 16; i++)
157 dsc->sc_reg_map[i] = i;
158
159 /*
160 * 8k of memory for NE1000, 16k otherwise.
161 */
162 switch (nsc->sc_type) {
163 case NE2000_TYPE_NE1000:
164 memsize = 8192;
165 break;
166 case NE2000_TYPE_NE2000:
167 case NE2000_TYPE_AX88190: /* XXX really? */
168 case NE2000_TYPE_DL10019:
169 case NE2000_TYPE_DL10022:
170 memsize = 8192 * 2;
171 break;
172 default:
173 memsize = 8192; /* safe default */
174 }
175
176 /*
177 * NIC memory doens't start at zero on an NE board.
178 * The start address is tied to the bus width.
179 * (It happens to be computed the same way as mem size.)
180 */
181 dsc->mem_start = memsize;
182
183 #ifdef GWETHER
184 {
185 int x, mstart = 0;
186 int8_t pbuf0[ED_PAGE_SIZE], pbuf[ED_PAGE_SIZE],
187 tbuf[ED_PAGE_SIZE];
188
189 for (i = 0; i < ED_PAGE_SIZE; i++)
190 pbuf0[i] = 0;
191
192 /* Search for the start of RAM. */
193 for (x = 1; x < 256; x++) {
194 ne2000_writemem(nict, nich, asict, asich, pbuf0,
195 x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword);
196 ne2000_readmem(nict, nich, asict, asich,
197 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword);
198 if (bcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) {
199 for (i = 0; i < ED_PAGE_SIZE; i++)
200 pbuf[i] = 255 - x;
201 ne2000_writemem(nict, nich, asict, asich,
202 pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE,
203 useword);
204 ne2000_readmem(nict, nich, asict, asich,
205 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE,
206 useword);
207 if (bcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) {
208 mstart = x << ED_PAGE_SHIFT;
209 memsize = ED_PAGE_SIZE;
210 break;
211 }
212 }
213 }
214
215 if (mstart == 0) {
216 printf("%s: cannot find start of RAM\n",
217 dsc->sc_dev.dv_xname);
218 return;
219 }
220
221 /* Search for the end of RAM. */
222 for (++x; x < 256; x++) {
223 ne2000_writemem(nict, nich, asict, asich, pbuf0,
224 x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword);
225 ne2000_readmem(nict, nich, asict, asich,
226 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword);
227 if (bcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) {
228 for (i = 0; i < ED_PAGE_SIZE; i++)
229 pbuf[i] = 255 - x;
230 ne2000_writemem(nict, nich, asict, asich,
231 pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE,
232 useword);
233 ne2000_readmem(nict, nich, asict, asich,
234 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE,
235 useword);
236 if (bcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0)
237 memsize += ED_PAGE_SIZE;
238 else
239 break;
240 } else
241 break;
242 }
243
244 printf("%s: RAM start 0x%x, size %d\n",
245 dsc->sc_dev.dv_xname, mstart, memsize);
246
247 dsc->mem_start = mstart;
248 }
249 #endif /* GWETHER */
250
251 dsc->mem_size = memsize;
252
253 if (myea == NULL) {
254 /* Read the station address. */
255 if (nsc->sc_type == NE2000_TYPE_AX88190) {
256 /* Select page 0 registers. */
257 bus_space_write_1(nict, nich, ED_P0_CR,
258 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
259 /* Select word transfer. */
260 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_WTS);
261 ne2000_readmem(nict, nich, asict, asich,
262 NE2000_AX88190_NODEID_OFFSET,
263 dsc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN, useword);
264 } else {
265 ne2000_readmem(nict, nich, asict, asich, 0, romdata,
266 sizeof(romdata), useword);
267 for (i = 0; i < ETHER_ADDR_LEN; i++)
268 #ifdef __NetBSD__
269 dsc->sc_enaddr[i] =
270 romdata[i * (useword ? 2 : 1)];
271 #else
272 dsc->sc_arpcom.ac_enaddr[i] =
273 romdata[i * (useword ? 2 : 1)];
274 #endif
275 }
276 } else
277 bcopy(myea, dsc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN);
278
279 /* Clear any pending interrupts that might have occurred above. */
280 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff);
281
282 if (dsc->sc_media_init == NULL)
283 dsc->sc_media_init = dp8390_media_init;
284
285 if (dp8390_config(dsc)) {
286 printf("%s: setup failed\n", dsc->sc_dev.dv_xname);
287 return (1);
288 }
289
290 /*
291 * We need to compute mem_ring a bit differently; override the
292 * value set up in dp8390_config().
293 */
294 dsc->mem_ring =
295 dsc->mem_start + ((dsc->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT);
296
297 return (0);
298 }
299
300 /*
301 * Detect an NE-2000 or compatible. Returns a model code.
302 */
303 int
ne2000_detect(nsc)304 ne2000_detect(nsc)
305 struct ne2000_softc *nsc;
306 {
307 struct dp8390_softc *dsc = &nsc->sc_dp8390;
308 bus_space_tag_t nict = dsc->sc_regt;
309 bus_space_handle_t nich = dsc->sc_regh;
310 bus_space_tag_t asict = nsc->sc_asict;
311 bus_space_handle_t asich = nsc->sc_asich;
312 static u_int8_t test_pattern[32] = "THIS is A memory TEST pattern";
313 u_int8_t test_buffer[32], tmp;
314 int i, rv = 0;
315
316 /* Reset the board. */
317 #ifdef GWETHER
318 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, 0);
319 delay(200);
320 #endif /* GWETHER */
321 tmp = bus_space_read_1(asict, asich, NE2000_ASIC_RESET);
322 delay(10000);
323
324 /*
325 * I don't know if this is necessary; probably cruft leftover from
326 * Clarkson packet driver code. Doesn't do a thing on the boards I've
327 * tested. -DG [note that a outb(0x84, 0) seems to work here, and is
328 * non-invasive...but some boards don't seem to reset and I don't have
329 * complete documentation on what the 'right' thing to do is...so we do
330 * the invasive thing for now. Yuck.]
331 */
332 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, tmp);
333 delay(5000);
334
335 /*
336 * This is needed because some NE clones apparently don't reset the
337 * NIC properly (or the NIC chip doesn't reset fully on power-up).
338 * XXX - this makes the probe invasive! Done against my better
339 * judgement. -DLG
340 */
341 bus_space_write_1(nict, nich, ED_P0_CR,
342 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
343
344 delay(5000);
345
346 /*
347 * Generic probe routine for testing for the existence of a DS8390.
348 * Must be performed after the NIC has just been reset. This
349 * works by looking at certain register values that are guaranteed
350 * to be initialized a certain way after power-up or reset.
351 *
352 * Specifically:
353 *
354 * Register reset bits set bits
355 * -------- ---------- --------
356 * CR TXP, STA RD2, STP
357 * ISR RST
358 * IMR <all>
359 * DCR LAS
360 * TCR LB1, LB0
361 *
362 * We only look at CR and ISR, however, since looking at the others
363 * would require changing register pages, which would be intrusive
364 * if this isn't an 8390.
365 */
366
367 tmp = bus_space_read_1(nict, nich, ED_P0_CR);
368 if ((tmp & (ED_CR_RD2 | ED_CR_TXP | ED_CR_STA | ED_CR_STP)) !=
369 (ED_CR_RD2 | ED_CR_STP))
370 goto out;
371
372 tmp = bus_space_read_1(nict, nich, ED_P0_ISR);
373 if ((tmp & ED_ISR_RST) != ED_ISR_RST)
374 goto out;
375
376 bus_space_write_1(nict, nich,
377 ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
378
379 for (i = 0; i < 100; i++) {
380 if ((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RST) ==
381 ED_ISR_RST) {
382 /* Ack the reset bit. */
383 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RST);
384 break;
385 }
386 delay(100);
387 }
388
389 #if 0
390 /* XXX */
391 if (i == 100)
392 goto out;
393 #endif
394
395 /*
396 * Test the ability to read and write to the NIC memory. This has
397 * the side effect of determining if this is an NE1000 or an NE2000.
398 */
399
400 /*
401 * This prevents packets from being stored in the NIC memory when
402 * the readmem routine turns on the start bit in the CR.
403 */
404 bus_space_write_1(nict, nich, ED_P0_RCR, ED_RCR_MON);
405
406 /* Temporarily initialize DCR for byte operations. */
407 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS);
408
409 bus_space_write_1(nict, nich, ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT);
410 bus_space_write_1(nict, nich, ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT);
411
412 /*
413 * Write a test pattern in byte mode. If this fails, then there
414 * probably isn't any memory at 8k - which likely means that the
415 * board is an NE2000.
416 */
417 ne2000_writemem(nict, nich, asict, asich, test_pattern, 8192,
418 sizeof(test_pattern), 0);
419 ne2000_readmem(nict, nich, asict, asich, 8192, test_buffer,
420 sizeof(test_buffer), 0);
421
422 if (bcmp(test_pattern, test_buffer, sizeof(test_pattern))) {
423 /* not an NE1000 - try NE2000 */
424 bus_space_write_1(nict, nich, ED_P0_DCR,
425 ED_DCR_WTS | ED_DCR_FT1 | ED_DCR_LS);
426 bus_space_write_1(nict, nich, ED_P0_PSTART,
427 16384 >> ED_PAGE_SHIFT);
428 bus_space_write_1(nict, nich, ED_P0_PSTOP,
429 32768 >> ED_PAGE_SHIFT);
430
431 /*
432 * Write the test pattern in word mode. If this also fails,
433 * then we don't know what this board is.
434 */
435 ne2000_writemem(nict, nich, asict, asich, test_pattern, 16384,
436 sizeof(test_pattern), 1);
437 ne2000_readmem(nict, nich, asict, asich, 16384, test_buffer,
438 sizeof(test_buffer), 1);
439
440 if (bcmp(test_pattern, test_buffer, sizeof(test_pattern)))
441 goto out; /* not an NE2000 either */
442
443 rv = NE2000_TYPE_NE2000;
444 } else {
445 /* We're an NE1000. */
446 rv = NE2000_TYPE_NE1000;
447 }
448
449 /* Clear any pending interrupts that might have occurred above. */
450 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff);
451
452 out:
453 return (rv);
454 }
455
456 /*
457 * Write an mbuf chain to the destination NIC memory address using programmed
458 * I/O.
459 */
460 int
ne2000_write_mbuf(sc,m,buf)461 ne2000_write_mbuf(sc, m, buf)
462 struct dp8390_softc *sc;
463 struct mbuf *m;
464 int buf;
465 {
466 struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
467 bus_space_tag_t nict = sc->sc_regt;
468 bus_space_handle_t nich = sc->sc_regh;
469 bus_space_tag_t asict = nsc->sc_asict;
470 bus_space_handle_t asich = nsc->sc_asich;
471 int savelen;
472 int maxwait = 100; /* about 120us */
473
474 savelen = m->m_pkthdr.len;
475
476 /* Select page 0 registers. */
477 bus_space_write_1(nict, nich, ED_P0_CR,
478 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
479
480 /* Reset remote DMA complete flag. */
481 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC);
482
483 /* Set up DMA byte count. */
484 bus_space_write_1(nict, nich, ED_P0_RBCR0, savelen);
485 bus_space_write_1(nict, nich, ED_P0_RBCR1, savelen >> 8);
486
487 /* Set up destination address in NIC mem. */
488 bus_space_write_1(nict, nich, ED_P0_RSAR0, buf);
489 bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8);
490
491 /* Set remote DMA write. */
492 bus_space_write_1(nict, nich,
493 ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
494
495 /*
496 * Transfer the mbuf chain to the NIC memory. NE2000 cards
497 * require that data be transferred as words, and only words,
498 * so that case requires some extra code to patch over odd-length
499 * mbufs.
500 */
501 if (nsc->sc_type == NE2000_TYPE_NE1000) {
502 /* NE1000s are easy. */
503 for (; m != 0; m = m->m_next) {
504 if (m->m_len) {
505 bus_space_write_multi_1(asict, asich,
506 NE2000_ASIC_DATA, mtod(m, u_int8_t *),
507 m->m_len);
508 }
509 }
510 } else {
511 /* NE2000s are a bit trickier. */
512 u_int8_t *data, savebyte[2];
513 int l, leftover;
514 #ifdef DIAGNOSTIC
515 u_int8_t *lim;
516 #endif
517 /* Start out with no leftover data. */
518 leftover = 0;
519 savebyte[0] = savebyte[1] = 0;
520
521 for (; m != 0; m = m->m_next) {
522 l = m->m_len;
523 if (l == 0)
524 continue;
525 data = mtod(m, u_int8_t *);
526 #ifdef DIAGNOSTIC
527 lim = data + l;
528 #endif
529 while (l > 0) {
530 if (leftover) {
531 /*
532 * Data left over (from mbuf or
533 * realignment). Buffer the next
534 * byte, and write it and the
535 * leftover data out.
536 */
537 savebyte[1] = *data++;
538 l--;
539 #ifdef __NetBSD__
540 bus_space_write_stream_2(asict, asich,
541 NE2000_ASIC_DATA,
542 *(u_int16_t *)savebyte);
543 #else
544 bus_space_write_raw_multi_2(asict,
545 asich, NE2000_ASIC_DATA,
546 savebyte, 2);
547 #endif
548 leftover = 0;
549 #ifdef i386
550 #define ALIGNED_POINTER(p,t) 1
551 #endif
552 #ifdef alpha
553 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
554 #endif
555 } else if (ALIGNED_POINTER(data,
556 u_int16_t) == 0) {
557 /*
558 * Unaligned data; buffer the next
559 * byte.
560 */
561 savebyte[0] = *data++;
562 l--;
563 leftover = 1;
564 } else {
565 /*
566 * Aligned data; output contiguous
567 * words as much as we can, then
568 * buffer the remaining byte, if any.
569 */
570 leftover = l & 1;
571 l &= ~1;
572 #ifdef __NetBSD__
573 bus_space_write_multi_stream_2(asict,
574 asich, NE2000_ASIC_DATA,
575 (u_int16_t *)data, l >> 1);
576 #else
577 bus_space_write_raw_multi_2(asict,
578 asich, NE2000_ASIC_DATA, data, l);
579 #endif
580 data += l;
581 if (leftover)
582 savebyte[0] = *data++;
583 l = 0;
584 }
585 }
586 if (l < 0)
587 panic("ne2000_write_mbuf: negative len");
588 #ifdef DIAGNOSTIC
589 if (data != lim)
590 panic("ne2000_write_mbuf: data != lim");
591 #endif
592 }
593 if (leftover) {
594 savebyte[1] = 0;
595 #ifdef __NetBSD__
596 bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA,
597 *(u_int16_t *)savebyte);
598 #else
599 bus_space_write_raw_multi_2(asict, asich,
600 NE2000_ASIC_DATA, savebyte, 2);
601 #endif
602 }
603 }
604
605 /*
606 * Wait for remote DMA to complete. This is necessary because on the
607 * transmit side, data is handled internally by the NIC in bursts, and
608 * we can't start another remote DMA until this one completes. Not
609 * waiting causes really bad things to happen - like the NIC wedging
610 * the bus.
611 */
612 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) !=
613 ED_ISR_RDC) && --maxwait);
614
615 if (maxwait == 0) {
616 log(LOG_WARNING,
617 "%s: remote transmit DMA failed to complete\n",
618 sc->sc_dev.dv_xname);
619 dp8390_reset(sc);
620 }
621
622 return (savelen);
623 }
624
625 /*
626 * Given a source and destination address, copy 'amount' of a packet from
627 * the ring buffer into a linear destination buffer. Takes into account
628 * ring-wrap.
629 */
630 int
ne2000_ring_copy(sc,src,dst,amount)631 ne2000_ring_copy(sc, src, dst, amount)
632 struct dp8390_softc *sc;
633 int src;
634 caddr_t dst;
635 u_short amount;
636 {
637 struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
638 bus_space_tag_t nict = sc->sc_regt;
639 bus_space_handle_t nich = sc->sc_regh;
640 bus_space_tag_t asict = nsc->sc_asict;
641 bus_space_handle_t asich = nsc->sc_asich;
642 u_short tmp_amount;
643 int useword = NE2000_USE_WORD(nsc);
644
645 /* Does copy wrap to lower addr in ring buffer? */
646 if (src + amount > sc->mem_end) {
647 tmp_amount = sc->mem_end - src;
648
649 /* Copy amount up to end of NIC memory. */
650 ne2000_readmem(nict, nich, asict, asich, src,
651 (u_int8_t *)dst, tmp_amount, useword);
652
653 amount -= tmp_amount;
654 src = sc->mem_ring;
655 dst += tmp_amount;
656 }
657
658 ne2000_readmem(nict, nich, asict, asich, src, (u_int8_t *)dst,
659 amount, useword);
660
661 return (src + amount);
662 }
663
664 void
ne2000_read_hdr(sc,buf,hdr)665 ne2000_read_hdr(sc, buf, hdr)
666 struct dp8390_softc *sc;
667 int buf;
668 struct dp8390_ring *hdr;
669 {
670 struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
671
672 ne2000_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich,
673 buf, (u_int8_t *)hdr, sizeof(struct dp8390_ring),
674 NE2000_USE_WORD(nsc));
675 #if BYTE_ORDER == BIG_ENDIAN
676 hdr->count = swap16(hdr->count);
677 #endif
678 }
679
680 int
ne2000_test_mem(sc)681 ne2000_test_mem(sc)
682 struct dp8390_softc *sc;
683 {
684
685 /* Noop. */
686 return (0);
687 }
688
689 /*
690 * Given a NIC memory source address and a host memory destination address,
691 * copy 'amount' from NIC to host using programmed i/o. The 'amount' is
692 * rounded up to a word - ok as long as mbufs are word sized.
693 */
694 void
ne2000_readmem(nict,nich,asict,asich,src,dst,amount,useword)695 ne2000_readmem(nict, nich, asict, asich, src, dst, amount, useword)
696 bus_space_tag_t nict;
697 bus_space_handle_t nich;
698 bus_space_tag_t asict;
699 bus_space_handle_t asich;
700 int src;
701 u_int8_t *dst;
702 size_t amount;
703 int useword;
704 {
705
706 /* Select page 0 registers. */
707 bus_space_write_1(nict, nich, ED_P0_CR,
708 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
709
710 /* Round up to a word. */
711 if (amount & 1)
712 ++amount;
713
714 /* Set up DMA byte count. */
715 bus_space_write_1(nict, nich, ED_P0_RBCR0, amount);
716 bus_space_write_1(nict, nich, ED_P0_RBCR1, amount >> 8);
717
718 /* Set up source address in NIC mem. */
719 bus_space_write_1(nict, nich, ED_P0_RSAR0, src);
720 bus_space_write_1(nict, nich, ED_P0_RSAR1, src >> 8);
721
722 bus_space_write_1(nict, nich, ED_P0_CR,
723 ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA);
724
725 if (useword)
726 #ifdef __NetBSD__
727 bus_space_read_multi_stream_2(asict, asich, NE2000_ASIC_DATA,
728 (u_int16_t *)dst, amount >> 1);
729 #else
730 bus_space_read_raw_multi_2(asict, asich, NE2000_ASIC_DATA,
731 dst, amount);
732 #endif
733 else
734 bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA,
735 dst, amount);
736 }
737
738 /*
739 * Stripped down routine for writing a linear buffer to NIC memory. Only
740 * used in the probe routine to test the memory. 'len' must be even.
741 */
742 void
ne2000_writemem(nict,nich,asict,asich,src,dst,len,useword)743 ne2000_writemem(nict, nich, asict, asich, src, dst, len, useword)
744 bus_space_tag_t nict;
745 bus_space_handle_t nich;
746 bus_space_tag_t asict;
747 bus_space_handle_t asich;
748 u_int8_t *src;
749 int dst;
750 size_t len;
751 int useword;
752 {
753 int maxwait = 100; /* about 120us */
754
755 /* Select page 0 registers. */
756 bus_space_write_1(nict, nich, ED_P0_CR,
757 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
758
759 /* Reset remote DMA complete flag. */
760 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC);
761
762 /* Set up DMA byte count. */
763 bus_space_write_1(nict, nich, ED_P0_RBCR0, len);
764 bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8);
765
766 /* Set up destination address in NIC mem. */
767 bus_space_write_1(nict, nich, ED_P0_RSAR0, dst);
768 bus_space_write_1(nict, nich, ED_P0_RSAR1, dst >> 8);
769
770 /* Set remote DMA write. */
771 bus_space_write_1(nict, nich, ED_P0_CR,
772 ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
773
774 if (useword)
775 #ifdef __NetBSD__
776 bus_space_write_multi_stream_2(asict, asich, NE2000_ASIC_DATA,
777 (u_int16_t *)src, len >> 1);
778 #else
779 bus_space_write_raw_multi_2(asict, asich, NE2000_ASIC_DATA,
780 src, len);
781 #endif
782 else
783 bus_space_write_multi_1(asict, asich, NE2000_ASIC_DATA,
784 src, len);
785
786 /*
787 * Wait for remote DMA to complete. This is necessary because on the
788 * transmit side, data is handled internally by the NIC in bursts, and
789 * we can't start another remote DMA until this one completes. Not
790 * waiting causes really bad things to happen - like the NIC wedging
791 * the bus.
792 */
793 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) !=
794 ED_ISR_RDC) && --maxwait);
795 }
796
797 int
ne2000_detach(sc,flags)798 ne2000_detach(sc, flags)
799 struct ne2000_softc *sc;
800 int flags;
801 {
802 return (dp8390_detach(&sc->sc_dp8390, flags));
803 }
804