ne2000.c revision 1.37
1 /* $NetBSD: ne2000.c,v 1.37 2001/11/13 13:14:42 lukem 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/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: ne2000.c,v 1.37 2001/11/13 13:14:42 lukem Exp $"); 59 60 #include "opt_ipkdb.h" 61 62 #include <sys/param.h> 63 #include <sys/systm.h> 64 #include <sys/device.h> 65 #include <sys/socket.h> 66 #include <sys/mbuf.h> 67 #include <sys/syslog.h> 68 69 #include <net/if.h> 70 #include <net/if_dl.h> 71 #include <net/if_types.h> 72 #include <net/if_media.h> 73 74 #include <net/if_ether.h> 75 76 #include <machine/bswap.h> 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 #ifdef IPKDB_NE 86 #include <ipkdb/ipkdb.h> 87 #endif 88 89 #include <dev/ic/dp8390reg.h> 90 #include <dev/ic/dp8390var.h> 91 92 #include <dev/ic/ne2000reg.h> 93 #include <dev/ic/ne2000var.h> 94 95 #include <dev/ic/ax88190reg.h> 96 97 #if BYTE_ORDER == BIG_ENDIAN 98 #include <machine/bswap.h> 99 #endif 100 101 int ne2000_write_mbuf __P((struct dp8390_softc *, struct mbuf *, int)); 102 int ne2000_ring_copy __P((struct dp8390_softc *, int, caddr_t, u_short)); 103 void ne2000_read_hdr __P((struct dp8390_softc *, int, struct dp8390_ring *)); 104 int ne2000_test_mem __P((struct dp8390_softc *)); 105 106 void ne2000_writemem __P((bus_space_tag_t, bus_space_handle_t, 107 bus_space_tag_t, bus_space_handle_t, u_int8_t *, int, size_t, 108 int, int)); 109 void ne2000_readmem __P((bus_space_tag_t, bus_space_handle_t, 110 bus_space_tag_t, bus_space_handle_t, int, u_int8_t *, size_t, int)); 111 112 int 113 ne2000_attach(nsc, myea) 114 struct ne2000_softc *nsc; 115 u_int8_t *myea; 116 { 117 struct dp8390_softc *dsc = &nsc->sc_dp8390; 118 bus_space_tag_t nict = dsc->sc_regt; 119 bus_space_handle_t nich = dsc->sc_regh; 120 bus_space_tag_t asict = nsc->sc_asict; 121 bus_space_handle_t asich = nsc->sc_asich; 122 u_int8_t romdata[16]; 123 int memsize, i, useword; 124 125 /* 126 * Detect it again unless caller specified it; this gives us 127 * the memory size. 128 */ 129 if (nsc->sc_type == 0) { 130 nsc->sc_type = ne2000_detect(nict, nich, asict, asich); 131 if (nsc->sc_type == 0) { 132 printf("%s: where did the card go?\n", 133 dsc->sc_dev.dv_xname); 134 return (1); 135 } 136 } 137 138 useword = NE2000_USE_WORD(nsc); 139 140 dsc->cr_proto = ED_CR_RD2; 141 if (nsc->sc_type == NE2000_TYPE_AX88190) { 142 dsc->rcr_proto = ED_RCR_INTT; 143 dsc->sc_flags |= DP8390_DO_AX88190_WORKAROUND; 144 } else 145 dsc->rcr_proto = 0; 146 147 /* 148 * DCR gets: 149 * 150 * FIFO threshold to 8, No auto-init Remote DMA, 151 * byte order=80x86. 152 * 153 * NE1000 gets byte-wide DMA, NE2000 gets word-wide DMA. 154 */ 155 dsc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS | (useword ? ED_DCR_WTS : 0); 156 157 dsc->test_mem = ne2000_test_mem; 158 dsc->ring_copy = ne2000_ring_copy; 159 dsc->write_mbuf = ne2000_write_mbuf; 160 dsc->read_hdr = ne2000_read_hdr; 161 162 /* Registers are linear. */ 163 for (i = 0; i < 16; i++) 164 dsc->sc_reg_map[i] = i; 165 166 /* 167 * 8k of memory for NE1000, 16k for NE2000 and 24k for the 168 * card uses DL10019. 169 */ 170 switch (nsc->sc_type) { 171 case NE2000_TYPE_NE1000: 172 memsize = 8192; 173 break; 174 case NE2000_TYPE_NE2000: 175 case NE2000_TYPE_AX88190: /* XXX really? */ 176 memsize = 8192 * 2; 177 break; 178 case NE2000_TYPE_DL10019: 179 case NE2000_TYPE_DL10022: 180 memsize = 8192 * 3; 181 break; 182 } 183 184 /* 185 * NIC memory doens't start at zero on an NE board. 186 * The start address is tied to the bus width. 187 * (It happens to be computed the same way as mem size.) 188 */ 189 dsc->mem_start = memsize; 190 191 #ifdef GWETHER 192 { 193 int x, mstart = 0; 194 int8_t pbuf0[ED_PAGE_SIZE], pbuf[ED_PAGE_SIZE], 195 tbuf[ED_PAGE_SIZE]; 196 197 for (i = 0; i < ED_PAGE_SIZE; i++) 198 pbuf0[i] = 0; 199 200 /* Search for the start of RAM. */ 201 for (x = 1; x < 256; x++) { 202 ne2000_writemem(nict, nich, asict, asich, pbuf0, 203 x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword, 0); 204 ne2000_readmem(nict, nich, asict, asich, 205 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword); 206 if (memcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) { 207 for (i = 0; i < ED_PAGE_SIZE; i++) 208 pbuf[i] = 255 - x; 209 ne2000_writemem(nict, nich, asict, asich, 210 pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE, 211 useword, 0); 212 ne2000_readmem(nict, nich, asict, asich, 213 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, 214 useword); 215 if (memcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) { 216 mstart = x << ED_PAGE_SHIFT; 217 memsize = ED_PAGE_SIZE; 218 break; 219 } 220 } 221 } 222 223 if (mstart == 0) { 224 printf("%s: cannot find start of RAM\n", 225 dsc->sc_dev.dv_xname); 226 return (1); 227 } 228 229 /* Search for the end of RAM. */ 230 for (++x; x < 256; x++) { 231 ne2000_writemem(nict, nich, asict, asich, pbuf0, 232 x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword, 0); 233 ne2000_readmem(nict, nich, asict, asich, 234 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword); 235 if (memcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) { 236 for (i = 0; i < ED_PAGE_SIZE; i++) 237 pbuf[i] = 255 - x; 238 ne2000_writemem(nict, nich, asict, asich, 239 pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE, 240 useword, 0); 241 ne2000_readmem(nict, nich, asict, asich, 242 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, 243 useword); 244 if (memcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) 245 memsize += ED_PAGE_SIZE; 246 else 247 break; 248 } else 249 break; 250 } 251 252 printf("%s: RAM start 0x%x, size %d\n", 253 dsc->sc_dev.dv_xname, mstart, memsize); 254 255 dsc->mem_start = mstart; 256 } 257 #endif /* GWETHER */ 258 259 dsc->mem_size = memsize; 260 261 if (myea == NULL) { 262 /* Read the station address. */ 263 if (nsc->sc_type == NE2000_TYPE_AX88190) { 264 /* Select page 0 registers. */ 265 NIC_BARRIER(nict, nich); 266 bus_space_write_1(nict, nich, ED_P0_CR, 267 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 268 NIC_BARRIER(nict, nich); 269 /* Select word transfer. */ 270 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_WTS); 271 NIC_BARRIER(nict, nich); 272 ne2000_readmem(nict, nich, asict, asich, 273 AX88190_NODEID_OFFSET, dsc->sc_enaddr, 274 ETHER_ADDR_LEN, useword); 275 } else { 276 ne2000_readmem(nict, nich, asict, asich, 0, romdata, 277 sizeof(romdata), useword); 278 for (i = 0; i < ETHER_ADDR_LEN; i++) 279 dsc->sc_enaddr[i] = 280 romdata[i * (useword ? 2 : 1)]; 281 } 282 } else 283 memcpy(dsc->sc_enaddr, myea, sizeof(dsc->sc_enaddr)); 284 285 /* Clear any pending interrupts that might have occurred above. */ 286 NIC_BARRIER(nict, nich); 287 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff); 288 NIC_BARRIER(nict, nich); 289 290 if (dsc->sc_media_init == NULL) 291 dsc->sc_media_init = dp8390_media_init; 292 293 if (dp8390_config(dsc)) { 294 printf("%s: setup failed\n", dsc->sc_dev.dv_xname); 295 return (1); 296 } 297 298 /* 299 * We need to compute mem_ring a bit differently; override the 300 * value set up in dp8390_config(). 301 */ 302 dsc->mem_ring = 303 dsc->mem_start + ((dsc->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); 304 305 return (0); 306 } 307 308 /* 309 * Detect an NE-2000 or compatible. Returns a model code. 310 */ 311 int 312 ne2000_detect(nict, nich, asict, asich) 313 bus_space_tag_t nict; 314 bus_space_handle_t nich; 315 bus_space_tag_t asict; 316 bus_space_handle_t asich; 317 { 318 static u_int8_t test_pattern[32] = "THIS is A memory TEST pattern"; 319 u_int8_t test_buffer[32], tmp; 320 int i, rv = 0; 321 322 /* Reset the board. */ 323 #ifdef GWETHER 324 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, 0); 325 bus_space_barrier(nict, nich, 0, NE2000_NPORTS, 326 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 327 delay(200); 328 #endif /* GWETHER */ 329 tmp = bus_space_read_1(asict, asich, NE2000_ASIC_RESET); 330 bus_space_barrier(nict, nich, 0, NE2000_NPORTS, 331 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 332 delay(10000); 333 334 /* 335 * I don't know if this is necessary; probably cruft leftover from 336 * Clarkson packet driver code. Doesn't do a thing on the boards I've 337 * tested. -DG [note that a outb(0x84, 0) seems to work here, and is 338 * non-invasive...but some boards don't seem to reset and I don't have 339 * complete documentation on what the 'right' thing to do is...so we do 340 * the invasive thing for now. Yuck.] 341 */ 342 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, tmp); 343 bus_space_barrier(nict, nich, 0, NE2000_NPORTS, 344 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 345 delay(5000); 346 347 /* 348 * This is needed because some NE clones apparently don't reset the 349 * NIC properly (or the NIC chip doesn't reset fully on power-up). 350 * XXX - this makes the probe invasive! Done against my better 351 * judgement. -DLG 352 */ 353 bus_space_write_1(nict, nich, ED_P0_CR, 354 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP); 355 NIC_BARRIER(nict, nich); 356 357 delay(5000); 358 359 /* 360 * Generic probe routine for testing for the existance of a DS8390. 361 * Must be performed after the NIC has just been reset. This 362 * works by looking at certain register values that are guaranteed 363 * to be initialized a certain way after power-up or reset. 364 * 365 * Specifically: 366 * 367 * Register reset bits set bits 368 * -------- ---------- -------- 369 * CR TXP, STA RD2, STP 370 * ISR RST 371 * IMR <all> 372 * DCR LAS 373 * TCR LB1, LB0 374 * 375 * We only look at CR and ISR, however, since looking at the others 376 * would require changing register pages, which would be intrusive 377 * if this isn't an 8390. 378 */ 379 380 tmp = bus_space_read_1(nict, nich, ED_P0_CR); 381 if ((tmp & (ED_CR_RD2 | ED_CR_TXP | ED_CR_STA | ED_CR_STP)) != 382 (ED_CR_RD2 | ED_CR_STP)) 383 goto out; 384 385 tmp = bus_space_read_1(nict, nich, ED_P0_ISR); 386 if ((tmp & ED_ISR_RST) != ED_ISR_RST) 387 goto out; 388 389 bus_space_write_1(nict, nich, 390 ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 391 NIC_BARRIER(nict, nich); 392 393 for (i = 0; i < 100; i++) { 394 if ((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RST) == 395 ED_ISR_RST) { 396 /* Ack the reset bit. */ 397 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RST); 398 NIC_BARRIER(nict, nich); 399 break; 400 } 401 delay(100); 402 } 403 404 #if 0 405 /* XXX */ 406 if (i == 100) 407 goto out; 408 #endif 409 410 /* 411 * Test the ability to read and write to the NIC memory. This has 412 * the side effect of determining if this is an NE1000 or an NE2000. 413 */ 414 415 /* 416 * This prevents packets from being stored in the NIC memory when 417 * the readmem routine turns on the start bit in the CR. 418 */ 419 bus_space_write_1(nict, nich, ED_P0_RCR, ED_RCR_MON); 420 NIC_BARRIER(nict, nich); 421 422 /* Temporarily initialize DCR for byte operations. */ 423 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); 424 425 bus_space_write_1(nict, nich, ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT); 426 bus_space_write_1(nict, nich, ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT); 427 428 /* 429 * Write a test pattern in byte mode. If this fails, then there 430 * probably isn't any memory at 8k - which likely means that the 431 * board is an NE2000. 432 */ 433 ne2000_writemem(nict, nich, asict, asich, test_pattern, 8192, 434 sizeof(test_pattern), 0, 1); 435 ne2000_readmem(nict, nich, asict, asich, 8192, test_buffer, 436 sizeof(test_buffer), 0); 437 438 if (memcmp(test_pattern, test_buffer, sizeof(test_pattern))) { 439 /* not an NE1000 - try NE2000 */ 440 bus_space_write_1(nict, nich, ED_P0_DCR, 441 ED_DCR_WTS | ED_DCR_FT1 | ED_DCR_LS); 442 bus_space_write_1(nict, nich, ED_P0_PSTART, 443 16384 >> ED_PAGE_SHIFT); 444 bus_space_write_1(nict, nich, ED_P0_PSTOP, 445 32768 >> ED_PAGE_SHIFT); 446 447 /* 448 * Write the test pattern in word mode. If this also fails, 449 * then we don't know what this board is. 450 */ 451 ne2000_writemem(nict, nich, asict, asich, test_pattern, 16384, 452 sizeof(test_pattern), 1, 0); 453 ne2000_readmem(nict, nich, asict, asich, 16384, test_buffer, 454 sizeof(test_buffer), 1); 455 456 if (memcmp(test_pattern, test_buffer, sizeof(test_pattern))) 457 goto out; /* not an NE2000 either */ 458 459 rv = NE2000_TYPE_NE2000; 460 } else { 461 /* We're an NE1000. */ 462 rv = NE2000_TYPE_NE1000; 463 } 464 465 /* Clear any pending interrupts that might have occurred above. */ 466 NIC_BARRIER(nict, nich); 467 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff); 468 469 out: 470 return (rv); 471 } 472 473 /* 474 * Write an mbuf chain to the destination NIC memory address using programmed 475 * I/O. 476 */ 477 int 478 ne2000_write_mbuf(sc, m, buf) 479 struct dp8390_softc *sc; 480 struct mbuf *m; 481 int buf; 482 { 483 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 484 bus_space_tag_t nict = sc->sc_regt; 485 bus_space_handle_t nich = sc->sc_regh; 486 bus_space_tag_t asict = nsc->sc_asict; 487 bus_space_handle_t asich = nsc->sc_asich; 488 int savelen; 489 int maxwait = 100; /* about 120us */ 490 491 savelen = m->m_pkthdr.len; 492 493 /* Select page 0 registers. */ 494 NIC_BARRIER(nict, nich); 495 bus_space_write_1(nict, nich, ED_P0_CR, 496 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 497 NIC_BARRIER(nict, nich); 498 499 /* Reset remote DMA complete flag. */ 500 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 501 NIC_BARRIER(nict, nich); 502 503 /* Set up DMA byte count. */ 504 bus_space_write_1(nict, nich, ED_P0_RBCR0, savelen); 505 bus_space_write_1(nict, nich, ED_P0_RBCR1, savelen >> 8); 506 507 /* Set up destination address in NIC mem. */ 508 bus_space_write_1(nict, nich, ED_P0_RSAR0, buf); 509 bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8); 510 511 /* Set remote DMA write. */ 512 NIC_BARRIER(nict, nich); 513 bus_space_write_1(nict, nich, 514 ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 515 NIC_BARRIER(nict, nich); 516 517 /* 518 * Transfer the mbuf chain to the NIC memory. NE2000 cards 519 * require that data be transferred as words, and only words, 520 * so that case requires some extra code to patch over odd-length 521 * mbufs. 522 */ 523 if (nsc->sc_type == NE2000_TYPE_NE1000) { 524 /* NE1000s are easy. */ 525 for (; m != 0; m = m->m_next) { 526 if (m->m_len) { 527 bus_space_write_multi_1(asict, asich, 528 NE2000_ASIC_DATA, mtod(m, u_int8_t *), 529 m->m_len); 530 } 531 } 532 } else { 533 /* NE2000s are a bit trickier. */ 534 u_int8_t *data, savebyte[2]; 535 int l, leftover; 536 #ifdef DIAGNOSTIC 537 u_int8_t *lim; 538 #endif 539 /* Start out with no leftover data. */ 540 leftover = 0; 541 savebyte[0] = savebyte[1] = 0; 542 543 for (; m != 0; m = m->m_next) { 544 l = m->m_len; 545 if (l == 0) 546 continue; 547 data = mtod(m, u_int8_t *); 548 #ifdef DIAGNOSTIC 549 lim = data + l; 550 #endif 551 while (l > 0) { 552 if (leftover) { 553 /* 554 * Data left over (from mbuf or 555 * realignment). Buffer the next 556 * byte, and write it and the 557 * leftover data out. 558 */ 559 savebyte[1] = *data++; 560 l--; 561 bus_space_write_stream_2(asict, asich, 562 NE2000_ASIC_DATA, 563 *(u_int16_t *)savebyte); 564 leftover = 0; 565 } else if (BUS_SPACE_ALIGNED_POINTER(data, 566 u_int16_t) == 0) { 567 /* 568 * Unaligned data; buffer the next 569 * byte. 570 */ 571 savebyte[0] = *data++; 572 l--; 573 leftover = 1; 574 } else { 575 /* 576 * Aligned data; output contiguous 577 * words as much as we can, then 578 * buffer the remaining byte, if any. 579 */ 580 leftover = l & 1; 581 l &= ~1; 582 bus_space_write_multi_stream_2(asict, 583 asich, NE2000_ASIC_DATA, 584 (u_int16_t *)data, l >> 1); 585 data += l; 586 if (leftover) 587 savebyte[0] = *data++; 588 l = 0; 589 } 590 } 591 if (l < 0) 592 panic("ne2000_write_mbuf: negative len"); 593 #ifdef DIAGNOSTIC 594 if (data != lim) 595 panic("ne2000_write_mbuf: data != lim"); 596 #endif 597 } 598 if (leftover) { 599 savebyte[1] = 0; 600 bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA, 601 *(u_int16_t *)savebyte); 602 } 603 } 604 NIC_BARRIER(nict, nich); 605 606 /* 607 * Wait for remote DMA to complete. This is necessary because on the 608 * transmit side, data is handled internally by the NIC in bursts, and 609 * we can't start another remote DMA until this one completes. Not 610 * waiting causes really bad things to happen - like the NIC wedging 611 * the bus. 612 */ 613 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != 614 ED_ISR_RDC) && --maxwait) { 615 bus_space_read_1(nict, nich, ED_P0_CRDA1); 616 bus_space_read_1(nict, nich, ED_P0_CRDA0); 617 NIC_BARRIER(nict, nich); 618 DELAY(1); 619 } 620 621 if (maxwait == 0) { 622 log(LOG_WARNING, 623 "%s: remote transmit DMA failed to complete\n", 624 sc->sc_dev.dv_xname); 625 dp8390_reset(sc); 626 } 627 628 return (savelen); 629 } 630 631 /* 632 * Given a source and destination address, copy 'amout' of a packet from 633 * the ring buffer into a linear destination buffer. Takes into account 634 * ring-wrap. 635 */ 636 int 637 ne2000_ring_copy(sc, src, dst, amount) 638 struct dp8390_softc *sc; 639 int src; 640 caddr_t dst; 641 u_short amount; 642 { 643 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 644 bus_space_tag_t nict = sc->sc_regt; 645 bus_space_handle_t nich = sc->sc_regh; 646 bus_space_tag_t asict = nsc->sc_asict; 647 bus_space_handle_t asich = nsc->sc_asich; 648 u_short tmp_amount; 649 int useword = NE2000_USE_WORD(nsc); 650 651 /* Does copy wrap to lower addr in ring buffer? */ 652 if (src + amount > sc->mem_end) { 653 tmp_amount = sc->mem_end - src; 654 655 /* Copy amount up to end of NIC memory. */ 656 ne2000_readmem(nict, nich, asict, asich, src, 657 (u_int8_t *)dst, tmp_amount, useword); 658 659 amount -= tmp_amount; 660 src = sc->mem_ring; 661 dst += tmp_amount; 662 } 663 664 ne2000_readmem(nict, nich, asict, asich, src, (u_int8_t *)dst, 665 amount, useword); 666 667 return (src + amount); 668 } 669 670 void 671 ne2000_read_hdr(sc, buf, hdr) 672 struct dp8390_softc *sc; 673 int buf; 674 struct dp8390_ring *hdr; 675 { 676 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 677 678 ne2000_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich, 679 buf, (u_int8_t *)hdr, sizeof(struct dp8390_ring), 680 NE2000_USE_WORD(nsc)); 681 #if BYTE_ORDER == BIG_ENDIAN 682 hdr->count = bswap16(hdr->count); 683 #endif 684 } 685 686 int 687 ne2000_test_mem(sc) 688 struct dp8390_softc *sc; 689 { 690 691 /* Noop. */ 692 return (0); 693 } 694 695 /* 696 * Given a NIC memory source address and a host memory destination address, 697 * copy 'amount' from NIC to host using programmed i/o. The 'amount' is 698 * rounded up to a word - ok as long as mbufs are word sized. 699 */ 700 void 701 ne2000_readmem(nict, nich, asict, asich, src, dst, amount, useword) 702 bus_space_tag_t nict; 703 bus_space_handle_t nich; 704 bus_space_tag_t asict; 705 bus_space_handle_t asich; 706 int src; 707 u_int8_t *dst; 708 size_t amount; 709 int useword; 710 { 711 712 /* Select page 0 registers. */ 713 NIC_BARRIER(nict, nich); 714 bus_space_write_1(nict, nich, ED_P0_CR, 715 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 716 NIC_BARRIER(nict, nich); 717 718 /* Round up to a word. */ 719 if (amount & 1) 720 ++amount; 721 722 /* Set up DMA byte count. */ 723 bus_space_write_1(nict, nich, ED_P0_RBCR0, amount); 724 bus_space_write_1(nict, nich, ED_P0_RBCR1, amount >> 8); 725 726 /* Set up source address in NIC mem. */ 727 bus_space_write_1(nict, nich, ED_P0_RSAR0, src); 728 bus_space_write_1(nict, nich, ED_P0_RSAR1, src >> 8); 729 730 NIC_BARRIER(nict, nich); 731 bus_space_write_1(nict, nich, ED_P0_CR, 732 ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA); 733 734 bus_space_barrier(nict, nich, 0, NE2000_NPORTS, 735 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 736 if (useword) 737 bus_space_read_multi_stream_2(asict, asich, NE2000_ASIC_DATA, 738 (u_int16_t *)dst, amount >> 1); 739 else 740 bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA, 741 dst, amount); 742 } 743 744 /* 745 * Stripped down routine for writing a linear buffer to NIC memory. Only 746 * used in the probe routine to test the memory. 'len' must be even. 747 */ 748 void 749 ne2000_writemem(nict, nich, asict, asich, src, dst, len, useword, quiet) 750 bus_space_tag_t nict; 751 bus_space_handle_t nich; 752 bus_space_tag_t asict; 753 bus_space_handle_t asich; 754 u_int8_t *src; 755 int dst; 756 size_t len; 757 int useword; 758 int quiet; 759 { 760 int maxwait = 100; /* about 120us */ 761 762 /* Select page 0 registers. */ 763 NIC_BARRIER(nict, nich); 764 bus_space_write_1(nict, nich, ED_P0_CR, 765 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 766 NIC_BARRIER(nict, nich); 767 768 /* Reset remote DMA complete flag. */ 769 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 770 NIC_BARRIER(nict, nich); 771 772 /* Set up DMA byte count. */ 773 bus_space_write_1(nict, nich, ED_P0_RBCR0, len); 774 bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8); 775 776 /* Set up destination address in NIC mem. */ 777 bus_space_write_1(nict, nich, ED_P0_RSAR0, dst); 778 bus_space_write_1(nict, nich, ED_P0_RSAR1, dst >> 8); 779 780 /* Set remote DMA write. */ 781 NIC_BARRIER(nict, nich); 782 bus_space_write_1(nict, nich, ED_P0_CR, 783 ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 784 785 bus_space_barrier(nict, nich, 0, NE2000_NPORTS, 786 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 787 if (useword) 788 bus_space_write_multi_stream_2(asict, asich, NE2000_ASIC_DATA, 789 (u_int16_t *)src, len >> 1); 790 else 791 bus_space_write_multi_1(asict, asich, NE2000_ASIC_DATA, 792 src, len); 793 794 /* 795 * Wait for remote DMA to complete. This is necessary because on the 796 * transmit side, data is handled internally by the NIC in bursts, and 797 * we can't start another remote DMA until this one completes. Not 798 * waiting causes really bad things to happen - like the NIC wedging 799 * the bus. 800 */ 801 bus_space_barrier(nict, nich, 0, NE2000_NPORTS, 802 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 803 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != 804 ED_ISR_RDC) && --maxwait) 805 DELAY(1); 806 807 if (!quiet && maxwait == 0) 808 printf("ne2000_writemem: failed to complete\n"); 809 } 810 811 int 812 ne2000_detach(sc, flags) 813 struct ne2000_softc *sc; 814 int flags; 815 { 816 817 return (dp8390_detach(&sc->sc_dp8390, flags)); 818 } 819 820 #ifdef IPKDB_NE 821 /* 822 * This code is essentially the same as ne2000_attach above. 823 */ 824 int 825 ne2000_ipkdb_attach(kip) 826 struct ipkdb_if *kip; 827 { 828 struct ne2000_softc *np = kip->port; 829 struct dp8390_softc *dp = &np->sc_dp8390; 830 bus_space_tag_t nict = dp->sc_regt; 831 bus_space_handle_t nich = dp->sc_regh; 832 int i, useword; 833 834 #ifdef GWETHER 835 /* Not supported (yet?) */ 836 return -1; 837 #endif 838 839 if (np->sc_type == 0) 840 np->sc_type = ne2000_detect(nict, nich, 841 np->sc_asict, np->sc_asich); 842 if (np->sc_type == 0) 843 return -1; 844 845 useword = NE2000_USE_WORD(np); 846 847 dp->cr_proto = ED_CR_RD2; 848 dp->dcr_reg = ED_DCR_FT1 | ED_DCR_LS | (useword ? ED_DCR_WTS : 0); 849 dp->rcr_proto = 0; 850 851 dp->test_mem = ne2000_test_mem; 852 dp->ring_copy = ne2000_ring_copy; 853 dp->write_mbuf = ne2000_write_mbuf; 854 dp->read_hdr = ne2000_read_hdr; 855 856 for (i = 0; i < 16; i++) 857 dp->sc_reg_map[i] = i; 858 859 switch (np->sc_type) { 860 case NE2000_TYPE_NE1000: 861 dp->mem_start = dp->mem_size = 8192; 862 kip->name = "ne1000"; 863 break; 864 case NE2000_TYPE_NE2000: 865 dp->mem_start = dp->mem_size = 8192 * 2; 866 kip->name = "ne2000"; 867 break; 868 case NE2000_TYPE_DL10019: 869 case NE2000_TYPE_DL10022: 870 dp->mem_start = dp->mem_size = 8192 * 3; 871 kip->name = (np->sc_type == NE2000_TYPE_DL10019) ? 872 "dl10022" : "dl10019"; 873 break; 874 case NE2000_TYPE_AX88190: 875 dp->rcr_proto = ED_RCR_INTT; 876 dp->sc_flags |= DP8390_DO_AX88190_WORKAROUND; 877 dp->mem_start = dp->mem_size = 8192 * 2; 878 kip->name = "ax88190"; 879 break; 880 } 881 882 if (dp8390_ipkdb_attach(kip)) 883 return -1; 884 885 dp->mem_ring = dp->mem_start 886 + ((dp->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); 887 888 if (!(kip->flags & IPKDB_MYHW)) { 889 char romdata[16]; 890 891 /* Read the station address. */ 892 if (np->sc_type == NE2000_TYPE_AX88190) { 893 /* Select page 0 registers. */ 894 NIC_BARRIER(nict, nich); 895 bus_space_write_1(nict, nich, ED_P0_CR, 896 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 897 NIC_BARRIER(nict, nich); 898 /* Select word transfer */ 899 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_WTS); 900 ne2000_readmem(nict, nich, np->sc_asict, np->sc_asich, 901 AX88190_NODEID_OFFSET, kip->myenetaddr, 902 ETHER_ADDR_LEN, useword); 903 } else { 904 ne2000_readmem(nict, nich, np->sc_asict, np->sc_asich, 905 0, romdata, sizeof romdata, useword); 906 useword = useword ? 2 : 1; 907 for (i = 0; i < ETHER_ADDR_LEN; i++) 908 kip->myenetaddr[i] = romdata[i * useword]; 909 } 910 kip->flags |= IPKDB_MYHW; 911 912 } 913 dp8390_stop(dp); 914 915 return 0; 916 } 917 #endif 918
Indexes created Tue Sep 23 07:09:52 GMT 2025