ne2000.c revision 1.23
1 /* $NetBSD: ne2000.c,v 1.23 1999/09/27 23:19:12 enami 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 Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * 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 * Device driver for National Semiconductor DS8390/WD83C690 based ethernet 42 * adapters. 43 * 44 * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. 45 * 46 * Copyright (C) 1993, David Greenman. This software may be used, modified, 47 * copied, distributed, and sold, in both source and binary form provided that 48 * the above copyright and these terms are retained. Under no circumstances is 49 * the author responsible for the proper functioning of this software, nor does 50 * the author assume any responsibility for damages incurred with its use. 51 */ 52 53 /* 54 * Common code shared by all NE2000-compatible Ethernet interfaces. 55 */ 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/device.h> 60 #include <sys/socket.h> 61 #include <sys/mbuf.h> 62 #include <sys/syslog.h> 63 64 #include <net/if.h> 65 #include <net/if_dl.h> 66 #include <net/if_types.h> 67 #include <net/if_media.h> 68 69 #include <net/if_ether.h> 70 71 #include <machine/bswap.h> 72 #include <machine/bus.h> 73 74 #ifndef __BUS_SPACE_HAS_STREAM_METHODS 75 #define bus_space_write_stream_2 bus_space_write_2 76 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 77 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 78 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ 79 80 #include <dev/ic/dp8390reg.h> 81 #include <dev/ic/dp8390var.h> 82 83 #include <dev/ic/ne2000reg.h> 84 #include <dev/ic/ne2000var.h> 85 86 #if BYTE_ORDER == BIG_ENDIAN 87 #include <machine/bswap.h> 88 #endif 89 90 int ne2000_write_mbuf __P((struct dp8390_softc *, struct mbuf *, int)); 91 int ne2000_ring_copy __P((struct dp8390_softc *, int, caddr_t, u_short)); 92 void ne2000_read_hdr __P((struct dp8390_softc *, int, struct dp8390_ring *)); 93 int ne2000_test_mem __P((struct dp8390_softc *)); 94 95 void ne2000_writemem __P((bus_space_tag_t, bus_space_handle_t, 96 bus_space_tag_t, bus_space_handle_t, u_int8_t *, int, size_t, 97 int, int)); 98 void ne2000_readmem __P((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 void 102 ne2000_attach(nsc, myea, media, nmedia, defmedia) 103 struct ne2000_softc *nsc; 104 u_int8_t *myea; 105 int *media, nmedia, defmedia; 106 { 107 struct dp8390_softc *dsc = &nsc->sc_dp8390; 108 bus_space_tag_t nict = dsc->sc_regt; 109 bus_space_handle_t nich = dsc->sc_regh; 110 bus_space_tag_t asict = nsc->sc_asict; 111 bus_space_handle_t asich = nsc->sc_asich; 112 u_int8_t romdata[16]; 113 int memsize, i, useword; 114 115 /* 116 * Detect it again unless caller specified it; this gives us 117 * the memory size. 118 */ 119 if (nsc->sc_type == 0) { 120 nsc->sc_type = ne2000_detect(nict, nich, asict, asich); 121 if (nsc->sc_type == 0) { 122 printf("%s: where did the card go?\n", 123 dsc->sc_dev.dv_xname); 124 return; 125 } 126 } 127 128 useword = NE2000_USE_WORD(nsc); 129 130 dsc->cr_proto = ED_CR_RD2; 131 132 /* 133 * DCR gets: 134 * 135 * FIFO threshold to 8, No auto-init Remote DMA, 136 * byte order=80x86. 137 * 138 * NE1000 gets byte-wide DMA, NE2000 gets word-wide DMA. 139 */ 140 dsc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS | (useword ? ED_DCR_WTS : 0); 141 142 dsc->test_mem = ne2000_test_mem; 143 dsc->ring_copy = ne2000_ring_copy; 144 dsc->write_mbuf = ne2000_write_mbuf; 145 dsc->read_hdr = ne2000_read_hdr; 146 147 /* Registers are linear. */ 148 for (i = 0; i < 16; i++) 149 dsc->sc_reg_map[i] = i; 150 151 /* 152 * 8k of memory for NE1000, 16k for NE2000 and 24k for the 153 * card uses DL10019. 154 */ 155 switch (nsc->sc_type) { 156 case NE2000_TYPE_NE1000: 157 memsize = 8192; 158 break; 159 case NE2000_TYPE_NE2000: 160 memsize = 8192 * 2; 161 break; 162 case NE2000_TYPE_DL10019: 163 memsize = 8192 * 3; 164 break; 165 } 166 167 /* 168 * NIC memory doens't start at zero on an NE board. 169 * The start address is tied to the bus width. 170 * (It happens to be computed the same way as mem size.) 171 */ 172 dsc->mem_start = memsize; 173 174 #ifdef GWETHER 175 { 176 int x, mstart = 0; 177 int8_t pbuf0[ED_PAGE_SIZE], pbuf[ED_PAGE_SIZE], 178 tbuf[ED_PAGE_SIZE]; 179 180 for (i = 0; i < ED_PAGE_SIZE; i++) 181 pbuf0[i] = 0; 182 183 /* Search for the start of RAM. */ 184 for (x = 1; x < 256; x++) { 185 ne2000_writemem(nict, nich, asict, asich, pbuf0, 186 x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword, 0); 187 ne2000_readmem(nict, nich, asict, asich, 188 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword); 189 if (bcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) { 190 for (i = 0; i < ED_PAGE_SIZE; i++) 191 pbuf[i] = 255 - x; 192 ne2000_writemem(nict, nich, asict, asich, 193 pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE, 194 useword, 0); 195 ne2000_readmem(nict, nich, asict, asich, 196 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, 197 useword); 198 if (bcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) { 199 mstart = x << ED_PAGE_SHIFT; 200 memsize = ED_PAGE_SIZE; 201 break; 202 } 203 } 204 } 205 206 if (mstart == 0) { 207 printf("%s: cannot find start of RAM\n", 208 dsc->sc_dev.dv_xname); 209 return; 210 } 211 212 /* Search for the end of RAM. */ 213 for (++x; x < 256; x++) { 214 ne2000_writemem(nict, nich, asict, asich, pbuf0, 215 x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword, 0); 216 ne2000_readmem(nict, nich, asict, asich, 217 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword); 218 if (bcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) { 219 for (i = 0; i < ED_PAGE_SIZE; i++) 220 pbuf[i] = 255 - x; 221 ne2000_writemem(nict, nich, asict, asich, 222 pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE, 223 useword, 0); 224 ne2000_readmem(nict, nich, asict, asich, 225 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, 226 useword); 227 if (bcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) 228 memsize += ED_PAGE_SIZE; 229 else 230 break; 231 } else 232 break; 233 } 234 235 printf("%s: RAM start 0x%x, size %d\n", 236 dsc->sc_dev.dv_xname, mstart, memsize); 237 238 dsc->mem_start = mstart; 239 } 240 #endif /* GWETHER */ 241 242 dsc->mem_size = memsize; 243 244 if (myea == NULL) { 245 /* Read the station address. */ 246 ne2000_readmem(nict, nich, asict, asich, 0, romdata, 247 sizeof(romdata), useword); 248 for (i = 0; i < ETHER_ADDR_LEN; i++) 249 dsc->sc_enaddr[i] = romdata[i * (useword ? 2 : 1)]; 250 } else 251 bcopy(myea, dsc->sc_enaddr, sizeof(dsc->sc_enaddr)); 252 253 /* Clear any pending interrupts that might have occurred above. */ 254 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff); 255 256 if (dp8390_config(dsc, media, nmedia, defmedia)) { 257 printf("%s: setup failed\n", dsc->sc_dev.dv_xname); 258 return; 259 } 260 261 /* 262 * We need to compute mem_ring a bit differently; override the 263 * value set up in dp8390_config(). 264 */ 265 dsc->mem_ring = 266 dsc->mem_start + ((dsc->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); 267 } 268 269 /* 270 * Detect an NE-2000 or compatible. Returns a model code. 271 */ 272 int 273 ne2000_detect(nict, nich, asict, asich) 274 bus_space_tag_t nict; 275 bus_space_handle_t nich; 276 bus_space_tag_t asict; 277 bus_space_handle_t asich; 278 { 279 static u_int8_t test_pattern[32] = "THIS is A memory TEST pattern"; 280 u_int8_t test_buffer[32], tmp; 281 int i, rv = 0; 282 283 /* Reset the board. */ 284 #ifdef GWETHER 285 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, 0); 286 delay(200); 287 #endif /* GWETHER */ 288 tmp = bus_space_read_1(asict, asich, NE2000_ASIC_RESET); 289 delay(10000); 290 291 /* 292 * I don't know if this is necessary; probably cruft leftover from 293 * Clarkson packet driver code. Doesn't do a thing on the boards I've 294 * tested. -DG [note that a outb(0x84, 0) seems to work here, and is 295 * non-invasive...but some boards don't seem to reset and I don't have 296 * complete documentation on what the 'right' thing to do is...so we do 297 * the invasive thing for now. Yuck.] 298 */ 299 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, tmp); 300 delay(5000); 301 302 /* 303 * This is needed because some NE clones apparently don't reset the 304 * NIC properly (or the NIC chip doesn't reset fully on power-up). 305 * XXX - this makes the probe invasive! Done against my better 306 * judgement. -DLG 307 */ 308 bus_space_write_1(nict, nich, ED_P0_CR, 309 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP); 310 311 delay(5000); 312 313 /* 314 * Generic probe routine for testing for the existance of a DS8390. 315 * Must be performed after the NIC has just been reset. This 316 * works by looking at certain register values that are guaranteed 317 * to be initialized a certain way after power-up or reset. 318 * 319 * Specifically: 320 * 321 * Register reset bits set bits 322 * -------- ---------- -------- 323 * CR TXP, STA RD2, STP 324 * ISR RST 325 * IMR <all> 326 * DCR LAS 327 * TCR LB1, LB0 328 * 329 * We only look at CR and ISR, however, since looking at the others 330 * would require changing register pages, which would be intrusive 331 * if this isn't an 8390. 332 */ 333 334 tmp = bus_space_read_1(nict, nich, ED_P0_CR); 335 if ((tmp & (ED_CR_RD2 | ED_CR_TXP | ED_CR_STA | ED_CR_STP)) != 336 (ED_CR_RD2 | ED_CR_STP)) 337 goto out; 338 339 tmp = bus_space_read_1(nict, nich, ED_P0_ISR); 340 if ((tmp & ED_ISR_RST) != ED_ISR_RST) 341 goto out; 342 343 bus_space_write_1(nict, nich, 344 ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 345 346 for (i = 0; i < 100; i++) { 347 if ((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RST) == 348 ED_ISR_RST) { 349 /* Ack the reset bit. */ 350 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RST); 351 break; 352 } 353 delay(100); 354 } 355 356 #if 0 357 /* XXX */ 358 if (i == 100) 359 goto out; 360 #endif 361 362 /* 363 * Test the ability to read and write to the NIC memory. This has 364 * the side effect of determining if this is an NE1000 or an NE2000. 365 */ 366 367 /* 368 * This prevents packets from being stored in the NIC memory when 369 * the readmem routine turns on the start bit in the CR. 370 */ 371 bus_space_write_1(nict, nich, ED_P0_RCR, ED_RCR_MON); 372 373 /* Temporarily initialize DCR for byte operations. */ 374 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); 375 376 bus_space_write_1(nict, nich, ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT); 377 bus_space_write_1(nict, nich, ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT); 378 379 /* 380 * Write a test pattern in byte mode. If this fails, then there 381 * probably isn't any memory at 8k - which likely means that the 382 * board is an NE2000. 383 */ 384 ne2000_writemem(nict, nich, asict, asich, test_pattern, 8192, 385 sizeof(test_pattern), 0, 1); 386 ne2000_readmem(nict, nich, asict, asich, 8192, test_buffer, 387 sizeof(test_buffer), 0); 388 389 if (bcmp(test_pattern, test_buffer, sizeof(test_pattern))) { 390 /* not an NE1000 - try NE2000 */ 391 bus_space_write_1(nict, nich, ED_P0_DCR, 392 ED_DCR_WTS | ED_DCR_FT1 | ED_DCR_LS); 393 bus_space_write_1(nict, nich, ED_P0_PSTART, 394 16384 >> ED_PAGE_SHIFT); 395 bus_space_write_1(nict, nich, ED_P0_PSTOP, 396 32768 >> ED_PAGE_SHIFT); 397 398 /* 399 * Write the test pattern in word mode. If this also fails, 400 * then we don't know what this board is. 401 */ 402 ne2000_writemem(nict, nich, asict, asich, test_pattern, 16384, 403 sizeof(test_pattern), 1, 0); 404 ne2000_readmem(nict, nich, asict, asich, 16384, test_buffer, 405 sizeof(test_buffer), 1); 406 407 if (bcmp(test_pattern, test_buffer, sizeof(test_pattern))) 408 goto out; /* not an NE2000 either */ 409 410 rv = NE2000_TYPE_NE2000; 411 } else { 412 /* We're an NE1000. */ 413 rv = NE2000_TYPE_NE1000; 414 } 415 416 /* Clear any pending interrupts that might have occurred above. */ 417 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff); 418 419 out: 420 return (rv); 421 } 422 423 /* 424 * Write an mbuf chain to the destination NIC memory address using programmed 425 * I/O. 426 */ 427 int 428 ne2000_write_mbuf(sc, m, buf) 429 struct dp8390_softc *sc; 430 struct mbuf *m; 431 int buf; 432 { 433 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 434 bus_space_tag_t nict = sc->sc_regt; 435 bus_space_handle_t nich = sc->sc_regh; 436 bus_space_tag_t asict = nsc->sc_asict; 437 bus_space_handle_t asich = nsc->sc_asich; 438 int savelen; 439 int maxwait = 100; /* about 120us */ 440 441 savelen = m->m_pkthdr.len; 442 443 /* Select page 0 registers. */ 444 bus_space_write_1(nict, nich, ED_P0_CR, 445 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 446 447 /* Reset remote DMA complete flag. */ 448 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 449 450 /* Set up DMA byte count. */ 451 bus_space_write_1(nict, nich, ED_P0_RBCR0, savelen); 452 bus_space_write_1(nict, nich, ED_P0_RBCR1, savelen >> 8); 453 454 /* Set up destination address in NIC mem. */ 455 bus_space_write_1(nict, nich, ED_P0_RSAR0, buf); 456 bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8); 457 458 /* Set remote DMA write. */ 459 bus_space_write_1(nict, nich, 460 ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 461 462 /* 463 * Transfer the mbuf chain to the NIC memory. NE2000 cards 464 * require that data be transferred as words, and only words, 465 * so that case requires some extra code to patch over odd-length 466 * mbufs. 467 */ 468 if (nsc->sc_type == NE2000_TYPE_NE1000) { 469 /* NE1000s are easy. */ 470 for (; m != 0; m = m->m_next) { 471 if (m->m_len) { 472 bus_space_write_multi_1(asict, asich, 473 NE2000_ASIC_DATA, mtod(m, u_int8_t *), 474 m->m_len); 475 } 476 } 477 } else { 478 /* NE2000s are a bit trickier. */ 479 u_int8_t *data, savebyte[2]; 480 int l, leftover; 481 #ifdef DIAGNOSTIC 482 u_int8_t *lim; 483 #endif 484 /* Start out with no leftover data. */ 485 leftover = 0; 486 savebyte[0] = savebyte[1] = 0; 487 488 for (; m != 0; m = m->m_next) { 489 l = m->m_len; 490 if (l == 0) 491 continue; 492 data = mtod(m, u_int8_t *); 493 #ifdef DIAGNOSTIC 494 lim = data + l; 495 #endif 496 while (l > 0) { 497 if (leftover) { 498 /* 499 * Data left over (from mbuf or 500 * realignment). Buffer the next 501 * byte, and write it and the 502 * leftover data out. 503 */ 504 savebyte[1] = *data++; 505 l--; 506 bus_space_write_stream_2(asict, asich, 507 NE2000_ASIC_DATA, 508 *(u_int16_t *)savebyte); 509 leftover = 0; 510 } else if (BUS_SPACE_ALIGNED_POINTER(data, 511 u_int16_t) == 0) { 512 /* 513 * Unaligned data; buffer the next 514 * byte. 515 */ 516 savebyte[0] = *data++; 517 l--; 518 leftover = 1; 519 } else { 520 /* 521 * Aligned data; output contiguous 522 * words as much as we can, then 523 * buffer the remaining byte, if any. 524 */ 525 leftover = l & 1; 526 l &= ~1; 527 bus_space_write_multi_stream_2(asict, 528 asich, NE2000_ASIC_DATA, 529 (u_int16_t *)data, l >> 1); 530 data += l; 531 if (leftover) 532 savebyte[0] = *data++; 533 l = 0; 534 } 535 } 536 if (l < 0) 537 panic("ne2000_write_mbuf: negative len"); 538 #ifdef DIAGNOSTIC 539 if (data != lim) 540 panic("ne2000_write_mbuf: data != lim"); 541 #endif 542 } 543 if (leftover) { 544 savebyte[1] = 0; 545 bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA, 546 *(u_int16_t *)savebyte); 547 } 548 } 549 550 /* 551 * Wait for remote DMA to complete. This is necessary because on the 552 * transmit side, data is handled internally by the NIC in bursts, and 553 * we can't start another remote DMA until this one completes. Not 554 * waiting causes really bad things to happen - like the NIC wedging 555 * the bus. 556 */ 557 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != 558 ED_ISR_RDC) && --maxwait); 559 560 if (maxwait == 0) { 561 log(LOG_WARNING, 562 "%s: remote transmit DMA failed to complete\n", 563 sc->sc_dev.dv_xname); 564 dp8390_reset(sc); 565 } 566 567 return (savelen); 568 } 569 570 /* 571 * Given a source and destination address, copy 'amout' of a packet from 572 * the ring buffer into a linear destination buffer. Takes into account 573 * ring-wrap. 574 */ 575 int 576 ne2000_ring_copy(sc, src, dst, amount) 577 struct dp8390_softc *sc; 578 int src; 579 caddr_t dst; 580 u_short amount; 581 { 582 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 583 bus_space_tag_t nict = sc->sc_regt; 584 bus_space_handle_t nich = sc->sc_regh; 585 bus_space_tag_t asict = nsc->sc_asict; 586 bus_space_handle_t asich = nsc->sc_asich; 587 u_short tmp_amount; 588 int useword = NE2000_USE_WORD(nsc); 589 590 /* Does copy wrap to lower addr in ring buffer? */ 591 if (src + amount > sc->mem_end) { 592 tmp_amount = sc->mem_end - src; 593 594 /* Copy amount up to end of NIC memory. */ 595 ne2000_readmem(nict, nich, asict, asich, src, 596 (u_int8_t *)dst, tmp_amount, useword); 597 598 amount -= tmp_amount; 599 src = sc->mem_ring; 600 dst += tmp_amount; 601 } 602 603 ne2000_readmem(nict, nich, asict, asich, src, (u_int8_t *)dst, 604 amount, useword); 605 606 return (src + amount); 607 } 608 609 void 610 ne2000_read_hdr(sc, buf, hdr) 611 struct dp8390_softc *sc; 612 int buf; 613 struct dp8390_ring *hdr; 614 { 615 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 616 617 ne2000_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich, 618 buf, (u_int8_t *)hdr, sizeof(struct dp8390_ring), 619 NE2000_USE_WORD(nsc)); 620 #if BYTE_ORDER == BIG_ENDIAN 621 hdr->count = bswap16(hdr->count); 622 #endif 623 } 624 625 int 626 ne2000_test_mem(sc) 627 struct dp8390_softc *sc; 628 { 629 630 /* Noop. */ 631 return (0); 632 } 633 634 /* 635 * Given a NIC memory source address and a host memory destination address, 636 * copy 'amount' from NIC to host using programmed i/o. The 'amount' is 637 * rounded up to a word - ok as long as mbufs are word sized. 638 */ 639 void 640 ne2000_readmem(nict, nich, asict, asich, src, dst, amount, useword) 641 bus_space_tag_t nict; 642 bus_space_handle_t nich; 643 bus_space_tag_t asict; 644 bus_space_handle_t asich; 645 int src; 646 u_int8_t *dst; 647 size_t amount; 648 int useword; 649 { 650 651 /* Select page 0 registers. */ 652 bus_space_write_1(nict, nich, ED_P0_CR, 653 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 654 655 /* Round up to a word. */ 656 if (amount & 1) 657 ++amount; 658 659 /* Set up DMA byte count. */ 660 bus_space_write_1(nict, nich, ED_P0_RBCR0, amount); 661 bus_space_write_1(nict, nich, ED_P0_RBCR1, amount >> 8); 662 663 /* Set up source address in NIC mem. */ 664 bus_space_write_1(nict, nich, ED_P0_RSAR0, src); 665 bus_space_write_1(nict, nich, ED_P0_RSAR1, src >> 8); 666 667 bus_space_write_1(nict, nich, ED_P0_CR, 668 ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA); 669 670 if (useword) 671 bus_space_read_multi_stream_2(asict, asich, NE2000_ASIC_DATA, 672 (u_int16_t *)dst, amount >> 1); 673 else 674 bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA, 675 dst, amount); 676 } 677 678 /* 679 * Stripped down routine for writing a linear buffer to NIC memory. Only 680 * used in the probe routine to test the memory. 'len' must be even. 681 */ 682 void 683 ne2000_writemem(nict, nich, asict, asich, src, dst, len, useword, quiet) 684 bus_space_tag_t nict; 685 bus_space_handle_t nich; 686 bus_space_tag_t asict; 687 bus_space_handle_t asich; 688 u_int8_t *src; 689 int dst; 690 size_t len; 691 int useword; 692 int quiet; 693 { 694 int maxwait = 100; /* about 120us */ 695 696 /* Select page 0 registers. */ 697 bus_space_write_1(nict, nich, ED_P0_CR, 698 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 699 700 /* Reset remote DMA complete flag. */ 701 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 702 703 /* Set up DMA byte count. */ 704 bus_space_write_1(nict, nich, ED_P0_RBCR0, len); 705 bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8); 706 707 /* Set up destination address in NIC mem. */ 708 bus_space_write_1(nict, nich, ED_P0_RSAR0, dst); 709 bus_space_write_1(nict, nich, ED_P0_RSAR1, dst >> 8); 710 711 /* Set remote DMA write. */ 712 bus_space_write_1(nict, nich, ED_P0_CR, 713 ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 714 715 if (useword) 716 bus_space_write_multi_stream_2(asict, asich, NE2000_ASIC_DATA, 717 (u_int16_t *)src, len >> 1); 718 else 719 bus_space_write_multi_1(asict, asich, NE2000_ASIC_DATA, 720 src, len); 721 722 /* 723 * Wait for remote DMA to complete. This is necessary because on the 724 * transmit side, data is handled internally by the NIC in bursts, and 725 * we can't start another remote DMA until this one completes. Not 726 * waiting causes really bad things to happen - like the NIC wedging 727 * the bus. 728 */ 729 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != 730 ED_ISR_RDC) && --maxwait); 731 732 if (!quiet && maxwait == 0) 733 printf("ne2000_writemem: failed to complete\n"); 734 } 735
Indexes created Tue Sep 23 14:10:03 GMT 2025