1 /* $NetBSD: ne2000.c,v 1.29 2000/03/22 20:58:28 ws 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 "opt_ipkdb.h" 58 59 #include <sys/param.h> 60 #include <sys/systm.h> 61 #include <sys/device.h> 62 #include <sys/socket.h> 63 #include <sys/mbuf.h> 64 #include <sys/syslog.h> 65 66 #include <net/if.h> 67 #include <net/if_dl.h> 68 #include <net/if_types.h> 69 #include <net/if_media.h> 70 71 #include <net/if_ether.h> 72 73 #include <machine/bswap.h> 74 #include <machine/bus.h> 75 76 #ifndef __BUS_SPACE_HAS_STREAM_METHODS 77 #define bus_space_write_stream_2 bus_space_write_2 78 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 79 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 80 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ 81 82 #ifdef IPKDB_NE 83 #include <ipkdb/ipkdb.h> 84 #endif 85 86 #include <dev/ic/dp8390reg.h> 87 #include <dev/ic/dp8390var.h> 88 89 #include <dev/ic/ne2000reg.h> 90 #include <dev/ic/ne2000var.h> 91 92 #if BYTE_ORDER == BIG_ENDIAN 93 #include <machine/bswap.h> 94 #endif 95 96 int ne2000_write_mbuf __P((struct dp8390_softc *, struct mbuf *, int)); 97 int ne2000_ring_copy __P((struct dp8390_softc *, int, caddr_t, u_short)); 98 void ne2000_read_hdr __P((struct dp8390_softc *, int, struct dp8390_ring *)); 99 int ne2000_test_mem __P((struct dp8390_softc *)); 100 101 void ne2000_writemem __P((bus_space_tag_t, bus_space_handle_t, 102 bus_space_tag_t, bus_space_handle_t, u_int8_t *, int, size_t, 103 int, int)); 104 void ne2000_readmem __P((bus_space_tag_t, bus_space_handle_t, 105 bus_space_tag_t, bus_space_handle_t, int, u_int8_t *, size_t, int)); 106 107 int 108 ne2000_attach(nsc, myea, media, nmedia, defmedia) 109 struct ne2000_softc *nsc; 110 u_int8_t *myea; 111 int *media, nmedia, defmedia; 112 { 113 struct dp8390_softc *dsc = &nsc->sc_dp8390; 114 bus_space_tag_t nict = dsc->sc_regt; 115 bus_space_handle_t nich = dsc->sc_regh; 116 bus_space_tag_t asict = nsc->sc_asict; 117 bus_space_handle_t asich = nsc->sc_asich; 118 u_int8_t romdata[16]; 119 int memsize, i, useword; 120 121 /* 122 * Detect it again unless caller specified it; this gives us 123 * the memory size. 124 */ 125 if (nsc->sc_type == 0) { 126 nsc->sc_type = ne2000_detect(nict, nich, asict, asich); 127 if (nsc->sc_type == 0) { 128 printf("%s: where did the card go?\n", 129 dsc->sc_dev.dv_xname); 130 return (1); 131 } 132 } 133 134 useword = NE2000_USE_WORD(nsc); 135 136 dsc->cr_proto = ED_CR_RD2; 137 if (nsc->sc_type == NE2000_TYPE_AX88190) { 138 dsc->rcr_proto = ED_RCR_INTT; 139 dsc->sc_flags |= DP8390_DO_AX88190_WORKAROUND; 140 } else 141 dsc->rcr_proto = 0; 142 143 /* 144 * DCR gets: 145 * 146 * FIFO threshold to 8, No auto-init Remote DMA, 147 * byte order=80x86. 148 * 149 * NE1000 gets byte-wide DMA, NE2000 gets word-wide DMA. 150 */ 151 dsc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS | (useword ? ED_DCR_WTS : 0); 152 153 dsc->test_mem = ne2000_test_mem; 154 dsc->ring_copy = ne2000_ring_copy; 155 dsc->write_mbuf = ne2000_write_mbuf; 156 dsc->read_hdr = ne2000_read_hdr; 157 158 /* Registers are linear. */ 159 for (i = 0; i < 16; i++) 160 dsc->sc_reg_map[i] = i; 161 162 /* 163 * 8k of memory for NE1000, 16k for NE2000 and 24k for the 164 * card uses DL10019. 165 */ 166 switch (nsc->sc_type) { 167 case NE2000_TYPE_NE1000: 168 memsize = 8192; 169 break; 170 case NE2000_TYPE_NE2000: 171 case NE2000_TYPE_AX88190: /* XXX really? */ 172 memsize = 8192 * 2; 173 break; 174 case NE2000_TYPE_DL10019: 175 memsize = 8192 * 3; 176 break; 177 } 178 179 /* 180 * NIC memory doens't start at zero on an NE board. 181 * The start address is tied to the bus width. 182 * (It happens to be computed the same way as mem size.) 183 */ 184 dsc->mem_start = memsize; 185 186 #ifdef GWETHER 187 { 188 int x, mstart = 0; 189 int8_t pbuf0[ED_PAGE_SIZE], pbuf[ED_PAGE_SIZE], 190 tbuf[ED_PAGE_SIZE]; 191 192 for (i = 0; i < ED_PAGE_SIZE; i++) 193 pbuf0[i] = 0; 194 195 /* Search for the start of RAM. */ 196 for (x = 1; x < 256; x++) { 197 ne2000_writemem(nict, nich, asict, asich, pbuf0, 198 x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword, 0); 199 ne2000_readmem(nict, nich, asict, asich, 200 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword); 201 if (bcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) { 202 for (i = 0; i < ED_PAGE_SIZE; i++) 203 pbuf[i] = 255 - x; 204 ne2000_writemem(nict, nich, asict, asich, 205 pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE, 206 useword, 0); 207 ne2000_readmem(nict, nich, asict, asich, 208 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, 209 useword); 210 if (bcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) { 211 mstart = x << ED_PAGE_SHIFT; 212 memsize = ED_PAGE_SIZE; 213 break; 214 } 215 } 216 } 217 218 if (mstart == 0) { 219 printf("%s: cannot find start of RAM\n", 220 dsc->sc_dev.dv_xname); 221 return (1); 222 } 223 224 /* Search for the end of RAM. */ 225 for (++x; x < 256; x++) { 226 ne2000_writemem(nict, nich, asict, asich, pbuf0, 227 x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword, 0); 228 ne2000_readmem(nict, nich, asict, asich, 229 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword); 230 if (bcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) { 231 for (i = 0; i < ED_PAGE_SIZE; i++) 232 pbuf[i] = 255 - x; 233 ne2000_writemem(nict, nich, asict, asich, 234 pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE, 235 useword, 0); 236 ne2000_readmem(nict, nich, asict, asich, 237 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, 238 useword); 239 if (bcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) 240 memsize += ED_PAGE_SIZE; 241 else 242 break; 243 } else 244 break; 245 } 246 247 printf("%s: RAM start 0x%x, size %d\n", 248 dsc->sc_dev.dv_xname, mstart, memsize); 249 250 dsc->mem_start = mstart; 251 } 252 #endif /* GWETHER */ 253 254 dsc->mem_size = memsize; 255 256 if (myea == NULL) { 257 /* Read the station address. */ 258 if (nsc->sc_type == NE2000_TYPE_AX88190) { 259 /* Select page 0 registers. */ 260 NIC_BARRIER(nict, nich); 261 bus_space_write_1(nict, nich, ED_P0_CR, 262 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 263 NIC_BARRIER(nict, nich); 264 /* Select word transfer. */ 265 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_WTS); 266 NIC_BARRIER(nict, nich); 267 ne2000_readmem(nict, nich, asict, asich, 268 NE2000_AX88190_NODEID_OFFSET, dsc->sc_enaddr, 269 ETHER_ADDR_LEN, useword); 270 } else { 271 ne2000_readmem(nict, nich, asict, asich, 0, romdata, 272 sizeof(romdata), useword); 273 for (i = 0; i < ETHER_ADDR_LEN; i++) 274 dsc->sc_enaddr[i] = 275 romdata[i * (useword ? 2 : 1)]; 276 } 277 } else 278 bcopy(myea, dsc->sc_enaddr, sizeof(dsc->sc_enaddr)); 279 280 /* Clear any pending interrupts that might have occurred above. */ 281 NIC_BARRIER(nict, nich); 282 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff); 283 NIC_BARRIER(nict, nich); 284 285 if (dp8390_config(dsc, media, nmedia, defmedia)) { 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 304 ne2000_detect(nict, nich, asict, asich) 305 bus_space_tag_t nict; 306 bus_space_handle_t nich; 307 bus_space_tag_t asict; 308 bus_space_handle_t asich; 309 { 310 static u_int8_t test_pattern[32] = "THIS is A memory TEST pattern"; 311 u_int8_t test_buffer[32], tmp; 312 int i, rv = 0; 313 314 /* Reset the board. */ 315 #ifdef GWETHER 316 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, 0); 317 bus_space_barrier(asict, asich, 0, NE2000_NPORTS, 318 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 319 delay(200); 320 #endif /* GWETHER */ 321 tmp = bus_space_read_1(asict, asich, NE2000_ASIC_RESET); 322 bus_space_barrier(asict, asich, 0, NE2000_NPORTS, 323 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 324 delay(10000); 325 326 /* 327 * I don't know if this is necessary; probably cruft leftover from 328 * Clarkson packet driver code. Doesn't do a thing on the boards I've 329 * tested. -DG [note that a outb(0x84, 0) seems to work here, and is 330 * non-invasive...but some boards don't seem to reset and I don't have 331 * complete documentation on what the 'right' thing to do is...so we do 332 * the invasive thing for now. Yuck.] 333 */ 334 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, tmp); 335 bus_space_barrier(asict, asich, 0, NE2000_NPORTS, 336 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 337 delay(5000); 338 339 /* 340 * This is needed because some NE clones apparently don't reset the 341 * NIC properly (or the NIC chip doesn't reset fully on power-up). 342 * XXX - this makes the probe invasive! Done against my better 343 * judgement. -DLG 344 */ 345 bus_space_write_1(nict, nich, ED_P0_CR, 346 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP); 347 NIC_BARRIER(nict, nich); 348 349 delay(5000); 350 351 /* 352 * Generic probe routine for testing for the existance of a DS8390. 353 * Must be performed after the NIC has just been reset. This 354 * works by looking at certain register values that are guaranteed 355 * to be initialized a certain way after power-up or reset. 356 * 357 * Specifically: 358 * 359 * Register reset bits set bits 360 * -------- ---------- -------- 361 * CR TXP, STA RD2, STP 362 * ISR RST 363 * IMR <all> 364 * DCR LAS 365 * TCR LB1, LB0 366 * 367 * We only look at CR and ISR, however, since looking at the others 368 * would require changing register pages, which would be intrusive 369 * if this isn't an 8390. 370 */ 371 372 tmp = bus_space_read_1(nict, nich, ED_P0_CR); 373 if ((tmp & (ED_CR_RD2 | ED_CR_TXP | ED_CR_STA | ED_CR_STP)) != 374 (ED_CR_RD2 | ED_CR_STP)) 375 goto out; 376 377 tmp = bus_space_read_1(nict, nich, ED_P0_ISR); 378 if ((tmp & ED_ISR_RST) != ED_ISR_RST) 379 goto out; 380 381 bus_space_write_1(nict, nich, 382 ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 383 NIC_BARRIER(nict, nich); 384 385 for (i = 0; i < 100; i++) { 386 if ((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RST) == 387 ED_ISR_RST) { 388 /* Ack the reset bit. */ 389 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RST); 390 NIC_BARRIER(nict, nich); 391 break; 392 } 393 delay(100); 394 } 395 396 #if 0 397 /* XXX */ 398 if (i == 100) 399 goto out; 400 #endif 401 402 /* 403 * Test the ability to read and write to the NIC memory. This has 404 * the side effect of determining if this is an NE1000 or an NE2000. 405 */ 406 407 /* 408 * This prevents packets from being stored in the NIC memory when 409 * the readmem routine turns on the start bit in the CR. 410 */ 411 bus_space_write_1(nict, nich, ED_P0_RCR, ED_RCR_MON); 412 NIC_BARRIER(nict, nich); 413 414 /* Temporarily initialize DCR for byte operations. */ 415 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); 416 417 bus_space_write_1(nict, nich, ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT); 418 bus_space_write_1(nict, nich, ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT); 419 420 /* 421 * Write a test pattern in byte mode. If this fails, then there 422 * probably isn't any memory at 8k - which likely means that the 423 * board is an NE2000. 424 */ 425 ne2000_writemem(nict, nich, asict, asich, test_pattern, 8192, 426 sizeof(test_pattern), 0, 1); 427 ne2000_readmem(nict, nich, asict, asich, 8192, test_buffer, 428 sizeof(test_buffer), 0); 429 430 if (bcmp(test_pattern, test_buffer, sizeof(test_pattern))) { 431 /* not an NE1000 - try NE2000 */ 432 bus_space_write_1(nict, nich, ED_P0_DCR, 433 ED_DCR_WTS | ED_DCR_FT1 | ED_DCR_LS); 434 bus_space_write_1(nict, nich, ED_P0_PSTART, 435 16384 >> ED_PAGE_SHIFT); 436 bus_space_write_1(nict, nich, ED_P0_PSTOP, 437 32768 >> ED_PAGE_SHIFT); 438 439 /* 440 * Write the test pattern in word mode. If this also fails, 441 * then we don't know what this board is. 442 */ 443 ne2000_writemem(nict, nich, asict, asich, test_pattern, 16384, 444 sizeof(test_pattern), 1, 0); 445 ne2000_readmem(nict, nich, asict, asich, 16384, test_buffer, 446 sizeof(test_buffer), 1); 447 448 if (bcmp(test_pattern, test_buffer, sizeof(test_pattern))) 449 goto out; /* not an NE2000 either */ 450 451 rv = NE2000_TYPE_NE2000; 452 } else { 453 /* We're an NE1000. */ 454 rv = NE2000_TYPE_NE1000; 455 } 456 457 /* Clear any pending interrupts that might have occurred above. */ 458 NIC_BARRIER(nict, nich); 459 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff); 460 461 out: 462 return (rv); 463 } 464 465 /* 466 * Write an mbuf chain to the destination NIC memory address using programmed 467 * I/O. 468 */ 469 int 470 ne2000_write_mbuf(sc, m, buf) 471 struct dp8390_softc *sc; 472 struct mbuf *m; 473 int buf; 474 { 475 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 476 bus_space_tag_t nict = sc->sc_regt; 477 bus_space_handle_t nich = sc->sc_regh; 478 bus_space_tag_t asict = nsc->sc_asict; 479 bus_space_handle_t asich = nsc->sc_asich; 480 int savelen; 481 int maxwait = 100; /* about 120us */ 482 483 savelen = m->m_pkthdr.len; 484 485 /* Select page 0 registers. */ 486 NIC_BARRIER(nict, nich); 487 bus_space_write_1(nict, nich, ED_P0_CR, 488 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 489 NIC_BARRIER(nict, nich); 490 491 /* Reset remote DMA complete flag. */ 492 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 493 NIC_BARRIER(nict, nich); 494 495 /* Set up DMA byte count. */ 496 bus_space_write_1(nict, nich, ED_P0_RBCR0, savelen); 497 bus_space_write_1(nict, nich, ED_P0_RBCR1, savelen >> 8); 498 499 /* Set up destination address in NIC mem. */ 500 bus_space_write_1(nict, nich, ED_P0_RSAR0, buf); 501 bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8); 502 503 /* Set remote DMA write. */ 504 NIC_BARRIER(nict, nich); 505 bus_space_write_1(nict, nich, 506 ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 507 NIC_BARRIER(nict, nich); 508 509 /* 510 * Transfer the mbuf chain to the NIC memory. NE2000 cards 511 * require that data be transferred as words, and only words, 512 * so that case requires some extra code to patch over odd-length 513 * mbufs. 514 */ 515 if (nsc->sc_type == NE2000_TYPE_NE1000) { 516 /* NE1000s are easy. */ 517 for (; m != 0; m = m->m_next) { 518 if (m->m_len) { 519 bus_space_write_multi_1(asict, asich, 520 NE2000_ASIC_DATA, mtod(m, u_int8_t *), 521 m->m_len); 522 } 523 } 524 } else { 525 /* NE2000s are a bit trickier. */ 526 u_int8_t *data, savebyte[2]; 527 int l, leftover; 528 #ifdef DIAGNOSTIC 529 u_int8_t *lim; 530 #endif 531 /* Start out with no leftover data. */ 532 leftover = 0; 533 savebyte[0] = savebyte[1] = 0; 534 535 for (; m != 0; m = m->m_next) { 536 l = m->m_len; 537 if (l == 0) 538 continue; 539 data = mtod(m, u_int8_t *); 540 #ifdef DIAGNOSTIC 541 lim = data + l; 542 #endif 543 while (l > 0) { 544 if (leftover) { 545 /* 546 * Data left over (from mbuf or 547 * realignment). Buffer the next 548 * byte, and write it and the 549 * leftover data out. 550 */ 551 savebyte[1] = *data++; 552 l--; 553 bus_space_write_stream_2(asict, asich, 554 NE2000_ASIC_DATA, 555 *(u_int16_t *)savebyte); 556 leftover = 0; 557 } else if (BUS_SPACE_ALIGNED_POINTER(data, 558 u_int16_t) == 0) { 559 /* 560 * Unaligned data; buffer the next 561 * byte. 562 */ 563 savebyte[0] = *data++; 564 l--; 565 leftover = 1; 566 } else { 567 /* 568 * Aligned data; output contiguous 569 * words as much as we can, then 570 * buffer the remaining byte, if any. 571 */ 572 leftover = l & 1; 573 l &= ~1; 574 bus_space_write_multi_stream_2(asict, 575 asich, NE2000_ASIC_DATA, 576 (u_int16_t *)data, l >> 1); 577 data += l; 578 if (leftover) 579 savebyte[0] = *data++; 580 l = 0; 581 } 582 } 583 if (l < 0) 584 panic("ne2000_write_mbuf: negative len"); 585 #ifdef DIAGNOSTIC 586 if (data != lim) 587 panic("ne2000_write_mbuf: data != lim"); 588 #endif 589 } 590 if (leftover) { 591 savebyte[1] = 0; 592 bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA, 593 *(u_int16_t *)savebyte); 594 } 595 } 596 NIC_BARRIER(nict, nich); 597 598 /* 599 * Wait for remote DMA to complete. This is necessary because on the 600 * transmit side, data is handled internally by the NIC in bursts, and 601 * we can't start another remote DMA until this one completes. Not 602 * waiting causes really bad things to happen - like the NIC wedging 603 * the bus. 604 */ 605 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != 606 ED_ISR_RDC) && --maxwait) { 607 bus_space_read_1(nict, nich, ED_P0_CRDA1); 608 bus_space_read_1(nict, nich, ED_P0_CRDA0); 609 NIC_BARRIER(nict, nich); 610 DELAY(1); 611 } 612 613 if (maxwait == 0) { 614 log(LOG_WARNING, 615 "%s: remote transmit DMA failed to complete\n", 616 sc->sc_dev.dv_xname); 617 dp8390_reset(sc); 618 } 619 620 return (savelen); 621 } 622 623 /* 624 * Given a source and destination address, copy 'amout' of a packet from 625 * the ring buffer into a linear destination buffer. Takes into account 626 * ring-wrap. 627 */ 628 int 629 ne2000_ring_copy(sc, src, dst, amount) 630 struct dp8390_softc *sc; 631 int src; 632 caddr_t dst; 633 u_short amount; 634 { 635 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 636 bus_space_tag_t nict = sc->sc_regt; 637 bus_space_handle_t nich = sc->sc_regh; 638 bus_space_tag_t asict = nsc->sc_asict; 639 bus_space_handle_t asich = nsc->sc_asich; 640 u_short tmp_amount; 641 int useword = NE2000_USE_WORD(nsc); 642 643 /* Does copy wrap to lower addr in ring buffer? */ 644 if (src + amount > sc->mem_end) { 645 tmp_amount = sc->mem_end - src; 646 647 /* Copy amount up to end of NIC memory. */ 648 ne2000_readmem(nict, nich, asict, asich, src, 649 (u_int8_t *)dst, tmp_amount, useword); 650 651 amount -= tmp_amount; 652 src = sc->mem_ring; 653 dst += tmp_amount; 654 } 655 656 ne2000_readmem(nict, nich, asict, asich, src, (u_int8_t *)dst, 657 amount, useword); 658 659 return (src + amount); 660 } 661 662 void 663 ne2000_read_hdr(sc, buf, hdr) 664 struct dp8390_softc *sc; 665 int buf; 666 struct dp8390_ring *hdr; 667 { 668 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 669 670 ne2000_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich, 671 buf, (u_int8_t *)hdr, sizeof(struct dp8390_ring), 672 NE2000_USE_WORD(nsc)); 673 #if BYTE_ORDER == BIG_ENDIAN 674 hdr->count = bswap16(hdr->count); 675 #endif 676 } 677 678 int 679 ne2000_test_mem(sc) 680 struct dp8390_softc *sc; 681 { 682 683 /* Noop. */ 684 return (0); 685 } 686 687 /* 688 * Given a NIC memory source address and a host memory destination address, 689 * copy 'amount' from NIC to host using programmed i/o. The 'amount' is 690 * rounded up to a word - ok as long as mbufs are word sized. 691 */ 692 void 693 ne2000_readmem(nict, nich, asict, asich, src, dst, amount, useword) 694 bus_space_tag_t nict; 695 bus_space_handle_t nich; 696 bus_space_tag_t asict; 697 bus_space_handle_t asich; 698 int src; 699 u_int8_t *dst; 700 size_t amount; 701 int useword; 702 { 703 704 /* Select page 0 registers. */ 705 NIC_BARRIER(nict, nich); 706 bus_space_write_1(nict, nich, ED_P0_CR, 707 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 708 NIC_BARRIER(nict, nich); 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 NIC_BARRIER(nict, nich); 723 bus_space_write_1(nict, nich, ED_P0_CR, 724 ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA); 725 NIC_BARRIER(nict, nich); 726 727 if (useword) 728 bus_space_read_multi_stream_2(asict, asich, NE2000_ASIC_DATA, 729 (u_int16_t *)dst, amount >> 1); 730 else 731 bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA, 732 dst, amount); 733 } 734 735 /* 736 * Stripped down routine for writing a linear buffer to NIC memory. Only 737 * used in the probe routine to test the memory. 'len' must be even. 738 */ 739 void 740 ne2000_writemem(nict, nich, asict, asich, src, dst, len, useword, quiet) 741 bus_space_tag_t nict; 742 bus_space_handle_t nich; 743 bus_space_tag_t asict; 744 bus_space_handle_t asich; 745 u_int8_t *src; 746 int dst; 747 size_t len; 748 int useword; 749 int quiet; 750 { 751 int maxwait = 100; /* about 120us */ 752 753 /* Select page 0 registers. */ 754 NIC_BARRIER(nict, nich); 755 bus_space_write_1(nict, nich, ED_P0_CR, 756 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 757 NIC_BARRIER(nict, nich); 758 759 /* Reset remote DMA complete flag. */ 760 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 761 NIC_BARRIER(nict, nich); 762 763 /* Set up DMA byte count. */ 764 bus_space_write_1(nict, nich, ED_P0_RBCR0, len); 765 bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8); 766 767 /* Set up destination address in NIC mem. */ 768 bus_space_write_1(nict, nich, ED_P0_RSAR0, dst); 769 bus_space_write_1(nict, nich, ED_P0_RSAR1, dst >> 8); 770 771 /* Set remote DMA write. */ 772 NIC_BARRIER(nict, nich); 773 bus_space_write_1(nict, nich, ED_P0_CR, 774 ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 775 NIC_BARRIER(nict, nich); 776 777 if (useword) 778 bus_space_write_multi_stream_2(asict, asich, NE2000_ASIC_DATA, 779 (u_int16_t *)src, len >> 1); 780 else 781 bus_space_write_multi_1(asict, asich, NE2000_ASIC_DATA, 782 src, len); 783 784 /* 785 * Wait for remote DMA to complete. This is necessary because on the 786 * transmit side, data is handled internally by the NIC in bursts, and 787 * we can't start another remote DMA until this one completes. Not 788 * waiting causes really bad things to happen - like the NIC wedging 789 * the bus. 790 */ 791 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != 792 ED_ISR_RDC) && --maxwait) 793 DELAY(1); 794 795 if (!quiet && maxwait == 0) 796 printf("ne2000_writemem: failed to complete\n"); 797 } 798 799 int 800 ne2000_detach(sc, flags) 801 struct ne2000_softc *sc; 802 int flags; 803 { 804 805 return (dp8390_detach(&sc->sc_dp8390, flags)); 806 } 807 808 #ifdef IPKDB_NE 809 /* 810 * This code is essentially the same as ne2000_attach above. 811 */ 812 int 813 ne2000_ipkdb_attach(kip) 814 struct ipkdb_if *kip; 815 { 816 struct ne2000_softc *np = kip->port; 817 struct dp8390_softc *dp = &np->sc_dp8390; 818 bus_space_tag_t nict = dp->sc_regt; 819 bus_space_handle_t nich = dp->sc_regh; 820 int i, useword; 821 822 #ifdef GWETHER 823 /* Not supported (yet?) */ 824 return -1; 825 #endif 826 827 if (np->sc_type == 0) 828 np->sc_type = ne2000_detect(nict, nich, 829 np->sc_asict, np->sc_asich); 830 if (np->sc_type == 0) 831 return -1; 832 833 useword = NE2000_USE_WORD(np); 834 835 dp->cr_proto = ED_CR_RD2; 836 dp->dcr_reg = ED_DCR_FT1 | ED_DCR_LS | (useword ? ED_DCR_WTS : 0); 837 dp->rcr_proto = 0; 838 839 dp->test_mem = ne2000_test_mem; 840 dp->ring_copy = ne2000_ring_copy; 841 dp->write_mbuf = ne2000_write_mbuf; 842 dp->read_hdr = ne2000_read_hdr; 843 844 for (i = 0; i < 16; i++) 845 dp->sc_reg_map[i] = i; 846 847 switch (np->sc_type) { 848 case NE2000_TYPE_NE1000: 849 dp->mem_start = dp->mem_size = 8192; 850 kip->name = "ne1000"; 851 break; 852 case NE2000_TYPE_NE2000: 853 dp->mem_start = dp->mem_size = 8192 * 2; 854 kip->name = "ne2000"; 855 break; 856 case NE2000_TYPE_DL10019: 857 dp->mem_start = dp->mem_size = 8192 * 3; 858 kip->name = "dl10019"; 859 break; 860 case NE2000_TYPE_AX88190: 861 dp->rcr_proto = ED_RCR_INTT; 862 dp->sc_flags |= DP8390_DO_AX88190_WORKAROUND; 863 dp->mem_start = dp->mem_size = 8192 * 2; 864 kip->name = "ax88190"; 865 break; 866 } 867 868 if (dp8390_ipkdb_attach(kip)) 869 return -1; 870 871 dp->mem_ring = dp->mem_start 872 + ((dp->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); 873 874 if (!(kip->flags & IPKDB_MYHW)) { 875 char romdata[16]; 876 877 /* Read the station address. */ 878 if (np->sc_type == NE2000_TYPE_AX88190) { 879 /* Select page 0 registers. */ 880 NIC_BARRIER(nict, nich); 881 bus_space_write_1(nict, nich, ED_P0_CR, 882 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 883 NIC_BARRIER(nict, nich); 884 /* Select word transfer */ 885 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_WTS); 886 ne2000_readmem(nict, nich, np->sc_asict, np->sc_asich, 887 NE2000_AX88190_NODEID_OFFSET, kip->myenetaddr, 888 ETHER_ADDR_LEN, useword); 889 } else { 890 ne2000_readmem(nict, nich, np->sc_asict, np->sc_asich, 891 0, romdata, sizeof romdata, useword); 892 useword = useword ? 2 : 1; 893 for (i = 0; i < ETHER_ADDR_LEN; i++) 894 kip->myenetaddr[i] = romdata[i * useword]; 895 } 896 kip->flags |= IPKDB_MYHW; 897 898 } 899 dp8390_stop(dp); 900 901 return 0; 902 } 903 #endif 904