ne2000.c revision 1.26
1 /* $NetBSD: ne2000.c,v 1.26 2000/02/09 14:42:35 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 int 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 (1); 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 (1); 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 (1); 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 return (0); 268 } 269 270 /* 271 * Detect an NE-2000 or compatible. Returns a model code. 272 */ 273 int 274 ne2000_detect(nict, nich, asict, asich) 275 bus_space_tag_t nict; 276 bus_space_handle_t nich; 277 bus_space_tag_t asict; 278 bus_space_handle_t asich; 279 { 280 static u_int8_t test_pattern[32] = "THIS is A memory TEST pattern"; 281 u_int8_t test_buffer[32], tmp; 282 int i, rv = 0; 283 284 /* Reset the board. */ 285 #ifdef GWETHER 286 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, 0); 287 delay(200); 288 #endif /* GWETHER */ 289 tmp = bus_space_read_1(asict, asich, NE2000_ASIC_RESET); 290 delay(10000); 291 292 /* 293 * I don't know if this is necessary; probably cruft leftover from 294 * Clarkson packet driver code. Doesn't do a thing on the boards I've 295 * tested. -DG [note that a outb(0x84, 0) seems to work here, and is 296 * non-invasive...but some boards don't seem to reset and I don't have 297 * complete documentation on what the 'right' thing to do is...so we do 298 * the invasive thing for now. Yuck.] 299 */ 300 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, tmp); 301 delay(5000); 302 303 /* 304 * This is needed because some NE clones apparently don't reset the 305 * NIC properly (or the NIC chip doesn't reset fully on power-up). 306 * XXX - this makes the probe invasive! Done against my better 307 * judgement. -DLG 308 */ 309 bus_space_write_1(nict, nich, ED_P0_CR, 310 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP); 311 312 delay(5000); 313 314 /* 315 * Generic probe routine for testing for the existance of a DS8390. 316 * Must be performed after the NIC has just been reset. This 317 * works by looking at certain register values that are guaranteed 318 * to be initialized a certain way after power-up or reset. 319 * 320 * Specifically: 321 * 322 * Register reset bits set bits 323 * -------- ---------- -------- 324 * CR TXP, STA RD2, STP 325 * ISR RST 326 * IMR <all> 327 * DCR LAS 328 * TCR LB1, LB0 329 * 330 * We only look at CR and ISR, however, since looking at the others 331 * would require changing register pages, which would be intrusive 332 * if this isn't an 8390. 333 */ 334 335 tmp = bus_space_read_1(nict, nich, ED_P0_CR); 336 if ((tmp & (ED_CR_RD2 | ED_CR_TXP | ED_CR_STA | ED_CR_STP)) != 337 (ED_CR_RD2 | ED_CR_STP)) 338 goto out; 339 340 tmp = bus_space_read_1(nict, nich, ED_P0_ISR); 341 if ((tmp & ED_ISR_RST) != ED_ISR_RST) 342 goto out; 343 344 bus_space_write_1(nict, nich, 345 ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 346 347 for (i = 0; i < 100; i++) { 348 if ((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RST) == 349 ED_ISR_RST) { 350 /* Ack the reset bit. */ 351 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RST); 352 break; 353 } 354 delay(100); 355 } 356 357 #if 0 358 /* XXX */ 359 if (i == 100) 360 goto out; 361 #endif 362 363 /* 364 * Test the ability to read and write to the NIC memory. This has 365 * the side effect of determining if this is an NE1000 or an NE2000. 366 */ 367 368 /* 369 * This prevents packets from being stored in the NIC memory when 370 * the readmem routine turns on the start bit in the CR. 371 */ 372 bus_space_write_1(nict, nich, ED_P0_RCR, ED_RCR_MON); 373 374 /* Temporarily initialize DCR for byte operations. */ 375 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); 376 377 bus_space_write_1(nict, nich, ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT); 378 bus_space_write_1(nict, nich, ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT); 379 380 /* 381 * Write a test pattern in byte mode. If this fails, then there 382 * probably isn't any memory at 8k - which likely means that the 383 * board is an NE2000. 384 */ 385 ne2000_writemem(nict, nich, asict, asich, test_pattern, 8192, 386 sizeof(test_pattern), 0, 1); 387 ne2000_readmem(nict, nich, asict, asich, 8192, test_buffer, 388 sizeof(test_buffer), 0); 389 390 if (bcmp(test_pattern, test_buffer, sizeof(test_pattern))) { 391 /* not an NE1000 - try NE2000 */ 392 bus_space_write_1(nict, nich, ED_P0_DCR, 393 ED_DCR_WTS | ED_DCR_FT1 | ED_DCR_LS); 394 bus_space_write_1(nict, nich, ED_P0_PSTART, 395 16384 >> ED_PAGE_SHIFT); 396 bus_space_write_1(nict, nich, ED_P0_PSTOP, 397 32768 >> ED_PAGE_SHIFT); 398 399 /* 400 * Write the test pattern in word mode. If this also fails, 401 * then we don't know what this board is. 402 */ 403 ne2000_writemem(nict, nich, asict, asich, test_pattern, 16384, 404 sizeof(test_pattern), 1, 0); 405 ne2000_readmem(nict, nich, asict, asich, 16384, test_buffer, 406 sizeof(test_buffer), 1); 407 408 if (bcmp(test_pattern, test_buffer, sizeof(test_pattern))) 409 goto out; /* not an NE2000 either */ 410 411 rv = NE2000_TYPE_NE2000; 412 } else { 413 /* We're an NE1000. */ 414 rv = NE2000_TYPE_NE1000; 415 } 416 417 /* Clear any pending interrupts that might have occurred above. */ 418 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff); 419 420 out: 421 return (rv); 422 } 423 424 /* 425 * Write an mbuf chain to the destination NIC memory address using programmed 426 * I/O. 427 */ 428 int 429 ne2000_write_mbuf(sc, m, buf) 430 struct dp8390_softc *sc; 431 struct mbuf *m; 432 int buf; 433 { 434 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 435 bus_space_tag_t nict = sc->sc_regt; 436 bus_space_handle_t nich = sc->sc_regh; 437 bus_space_tag_t asict = nsc->sc_asict; 438 bus_space_handle_t asich = nsc->sc_asich; 439 int savelen; 440 int maxwait = 100; /* about 120us */ 441 442 savelen = m->m_pkthdr.len; 443 444 /* Select page 0 registers. */ 445 bus_space_write_1(nict, nich, ED_P0_CR, 446 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 447 448 /* Reset remote DMA complete flag. */ 449 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 450 451 /* Set up DMA byte count. */ 452 bus_space_write_1(nict, nich, ED_P0_RBCR0, savelen); 453 bus_space_write_1(nict, nich, ED_P0_RBCR1, savelen >> 8); 454 455 /* Set up destination address in NIC mem. */ 456 bus_space_write_1(nict, nich, ED_P0_RSAR0, buf); 457 bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8); 458 459 /* Set remote DMA write. */ 460 bus_space_write_1(nict, nich, 461 ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 462 463 /* 464 * Transfer the mbuf chain to the NIC memory. NE2000 cards 465 * require that data be transferred as words, and only words, 466 * so that case requires some extra code to patch over odd-length 467 * mbufs. 468 */ 469 if (nsc->sc_type == NE2000_TYPE_NE1000) { 470 /* NE1000s are easy. */ 471 for (; m != 0; m = m->m_next) { 472 if (m->m_len) { 473 bus_space_write_multi_1(asict, asich, 474 NE2000_ASIC_DATA, mtod(m, u_int8_t *), 475 m->m_len); 476 } 477 } 478 } else { 479 /* NE2000s are a bit trickier. */ 480 u_int8_t *data, savebyte[2]; 481 int l, leftover; 482 #ifdef DIAGNOSTIC 483 u_int8_t *lim; 484 #endif 485 /* Start out with no leftover data. */ 486 leftover = 0; 487 savebyte[0] = savebyte[1] = 0; 488 489 for (; m != 0; m = m->m_next) { 490 l = m->m_len; 491 if (l == 0) 492 continue; 493 data = mtod(m, u_int8_t *); 494 #ifdef DIAGNOSTIC 495 lim = data + l; 496 #endif 497 while (l > 0) { 498 if (leftover) { 499 /* 500 * Data left over (from mbuf or 501 * realignment). Buffer the next 502 * byte, and write it and the 503 * leftover data out. 504 */ 505 savebyte[1] = *data++; 506 l--; 507 bus_space_write_stream_2(asict, asich, 508 NE2000_ASIC_DATA, 509 *(u_int16_t *)savebyte); 510 leftover = 0; 511 } else if (BUS_SPACE_ALIGNED_POINTER(data, 512 u_int16_t) == 0) { 513 /* 514 * Unaligned data; buffer the next 515 * byte. 516 */ 517 savebyte[0] = *data++; 518 l--; 519 leftover = 1; 520 } else { 521 /* 522 * Aligned data; output contiguous 523 * words as much as we can, then 524 * buffer the remaining byte, if any. 525 */ 526 leftover = l & 1; 527 l &= ~1; 528 bus_space_write_multi_stream_2(asict, 529 asich, NE2000_ASIC_DATA, 530 (u_int16_t *)data, l >> 1); 531 data += l; 532 if (leftover) 533 savebyte[0] = *data++; 534 l = 0; 535 } 536 } 537 if (l < 0) 538 panic("ne2000_write_mbuf: negative len"); 539 #ifdef DIAGNOSTIC 540 if (data != lim) 541 panic("ne2000_write_mbuf: data != lim"); 542 #endif 543 } 544 if (leftover) { 545 savebyte[1] = 0; 546 bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA, 547 *(u_int16_t *)savebyte); 548 } 549 } 550 551 /* 552 * Wait for remote DMA to complete. This is necessary because on the 553 * transmit side, data is handled internally by the NIC in bursts, and 554 * we can't start another remote DMA until this one completes. Not 555 * waiting causes really bad things to happen - like the NIC wedging 556 * the bus. 557 */ 558 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != 559 ED_ISR_RDC) && --maxwait); 560 561 if (maxwait == 0) { 562 log(LOG_WARNING, 563 "%s: remote transmit DMA failed to complete\n", 564 sc->sc_dev.dv_xname); 565 dp8390_reset(sc); 566 } 567 568 return (savelen); 569 } 570 571 /* 572 * Given a source and destination address, copy 'amout' of a packet from 573 * the ring buffer into a linear destination buffer. Takes into account 574 * ring-wrap. 575 */ 576 int 577 ne2000_ring_copy(sc, src, dst, amount) 578 struct dp8390_softc *sc; 579 int src; 580 caddr_t dst; 581 u_short amount; 582 { 583 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 584 bus_space_tag_t nict = sc->sc_regt; 585 bus_space_handle_t nich = sc->sc_regh; 586 bus_space_tag_t asict = nsc->sc_asict; 587 bus_space_handle_t asich = nsc->sc_asich; 588 u_short tmp_amount; 589 int useword = NE2000_USE_WORD(nsc); 590 591 /* Does copy wrap to lower addr in ring buffer? */ 592 if (src + amount > sc->mem_end) { 593 tmp_amount = sc->mem_end - src; 594 595 /* Copy amount up to end of NIC memory. */ 596 ne2000_readmem(nict, nich, asict, asich, src, 597 (u_int8_t *)dst, tmp_amount, useword); 598 599 amount -= tmp_amount; 600 src = sc->mem_ring; 601 dst += tmp_amount; 602 } 603 604 ne2000_readmem(nict, nich, asict, asich, src, (u_int8_t *)dst, 605 amount, useword); 606 607 return (src + amount); 608 } 609 610 void 611 ne2000_read_hdr(sc, buf, hdr) 612 struct dp8390_softc *sc; 613 int buf; 614 struct dp8390_ring *hdr; 615 { 616 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 617 618 ne2000_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich, 619 buf, (u_int8_t *)hdr, sizeof(struct dp8390_ring), 620 NE2000_USE_WORD(nsc)); 621 #if BYTE_ORDER == BIG_ENDIAN 622 hdr->count = bswap16(hdr->count); 623 #endif 624 } 625 626 int 627 ne2000_test_mem(sc) 628 struct dp8390_softc *sc; 629 { 630 631 /* Noop. */ 632 return (0); 633 } 634 635 /* 636 * Given a NIC memory source address and a host memory destination address, 637 * copy 'amount' from NIC to host using programmed i/o. The 'amount' is 638 * rounded up to a word - ok as long as mbufs are word sized. 639 */ 640 void 641 ne2000_readmem(nict, nich, asict, asich, src, dst, amount, useword) 642 bus_space_tag_t nict; 643 bus_space_handle_t nich; 644 bus_space_tag_t asict; 645 bus_space_handle_t asich; 646 int src; 647 u_int8_t *dst; 648 size_t amount; 649 int useword; 650 { 651 652 /* Select page 0 registers. */ 653 bus_space_write_1(nict, nich, ED_P0_CR, 654 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 655 656 /* Round up to a word. */ 657 if (amount & 1) 658 ++amount; 659 660 /* Set up DMA byte count. */ 661 bus_space_write_1(nict, nich, ED_P0_RBCR0, amount); 662 bus_space_write_1(nict, nich, ED_P0_RBCR1, amount >> 8); 663 664 /* Set up source address in NIC mem. */ 665 bus_space_write_1(nict, nich, ED_P0_RSAR0, src); 666 bus_space_write_1(nict, nich, ED_P0_RSAR1, src >> 8); 667 668 bus_space_write_1(nict, nich, ED_P0_CR, 669 ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA); 670 671 if (useword) 672 bus_space_read_multi_stream_2(asict, asich, NE2000_ASIC_DATA, 673 (u_int16_t *)dst, amount >> 1); 674 else 675 bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA, 676 dst, amount); 677 } 678 679 /* 680 * Stripped down routine for writing a linear buffer to NIC memory. Only 681 * used in the probe routine to test the memory. 'len' must be even. 682 */ 683 void 684 ne2000_writemem(nict, nich, asict, asich, src, dst, len, useword, quiet) 685 bus_space_tag_t nict; 686 bus_space_handle_t nich; 687 bus_space_tag_t asict; 688 bus_space_handle_t asich; 689 u_int8_t *src; 690 int dst; 691 size_t len; 692 int useword; 693 int quiet; 694 { 695 int maxwait = 100; /* about 120us */ 696 697 /* Select page 0 registers. */ 698 bus_space_write_1(nict, nich, ED_P0_CR, 699 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 700 701 /* Reset remote DMA complete flag. */ 702 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 703 704 /* Set up DMA byte count. */ 705 bus_space_write_1(nict, nich, ED_P0_RBCR0, len); 706 bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8); 707 708 /* Set up destination address in NIC mem. */ 709 bus_space_write_1(nict, nich, ED_P0_RSAR0, dst); 710 bus_space_write_1(nict, nich, ED_P0_RSAR1, dst >> 8); 711 712 /* Set remote DMA write. */ 713 bus_space_write_1(nict, nich, ED_P0_CR, 714 ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 715 716 if (useword) 717 bus_space_write_multi_stream_2(asict, asich, NE2000_ASIC_DATA, 718 (u_int16_t *)src, len >> 1); 719 else 720 bus_space_write_multi_1(asict, asich, NE2000_ASIC_DATA, 721 src, len); 722 723 /* 724 * Wait for remote DMA to complete. This is necessary because on the 725 * transmit side, data is handled internally by the NIC in bursts, and 726 * we can't start another remote DMA until this one completes. Not 727 * waiting causes really bad things to happen - like the NIC wedging 728 * the bus. 729 */ 730 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != 731 ED_ISR_RDC) && --maxwait); 732 733 if (!quiet && maxwait == 0) 734 printf("ne2000_writemem: failed to complete\n"); 735 } 736 737 int 738 ne2000_detach(sc, flags) 739 struct ne2000_softc *sc; 740 int flags; 741 { 742 743 return (dp8390_detach(&sc->sc_dp8390, flags)); 744 } 745
Indexes created Mon Sep 22 21:09:42 GMT 2025