ne2000.c revision 1.67
1 /* $NetBSD: ne2000.c,v 1.67 2010/02/24 22:37:58 dyoung 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Device driver for National Semiconductor DS8390/WD83C690 based ethernet 35 * adapters. 36 * 37 * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. 38 * 39 * Copyright (C) 1993, David Greenman. This software may be used, modified, 40 * copied, distributed, and sold, in both source and binary form provided that 41 * the above copyright and these terms are retained. Under no circumstances is 42 * the author responsible for the proper functioning of this software, nor does 43 * the author assume any responsibility for damages incurred with its use. 44 */ 45 46 /* 47 * Common code shared by all NE2000-compatible Ethernet interfaces. 48 */ 49 50 #include <sys/cdefs.h> 51 __KERNEL_RCSID(0, "$NetBSD: ne2000.c,v 1.67 2010/02/24 22:37:58 dyoung Exp $"); 52 53 #include "opt_ipkdb.h" 54 55 #include <sys/param.h> 56 #include <sys/systm.h> 57 #include <sys/device.h> 58 #include <sys/socket.h> 59 #include <sys/mbuf.h> 60 #include <sys/syslog.h> 61 62 #include <net/if.h> 63 #include <net/if_dl.h> 64 #include <net/if_types.h> 65 #include <net/if_media.h> 66 67 #include <net/if_ether.h> 68 69 #include <sys/bswap.h> 70 #include <sys/bus.h> 71 72 #ifndef __BUS_SPACE_HAS_STREAM_METHODS 73 #define bus_space_write_stream_2 bus_space_write_2 74 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 75 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 76 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ 77 78 #ifdef IPKDB_NE 79 #include <ipkdb/ipkdb.h> 80 #endif 81 82 #include <dev/ic/dp8390reg.h> 83 #include <dev/ic/dp8390var.h> 84 85 #include <dev/ic/ne2000reg.h> 86 #include <dev/ic/ne2000var.h> 87 88 #include <dev/ic/ax88190reg.h> 89 90 int ne2000_write_mbuf(struct dp8390_softc *, struct mbuf *, int); 91 int ne2000_ring_copy(struct dp8390_softc *, int, void *, u_short); 92 void ne2000_read_hdr(struct dp8390_softc *, int, struct dp8390_ring *); 93 int ne2000_test_mem(struct dp8390_softc *); 94 95 void ne2000_writemem(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(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 #define ASIC_BARRIER(asict, asich) \ 102 bus_space_barrier((asict), (asich), 0, 0x10, \ 103 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE) 104 105 int 106 ne2000_attach(struct ne2000_softc *nsc, u_int8_t *myea) 107 { 108 struct dp8390_softc *dsc = &nsc->sc_dp8390; 109 bus_space_tag_t nict = dsc->sc_regt; 110 bus_space_handle_t nich = dsc->sc_regh; 111 bus_space_tag_t asict = nsc->sc_asict; 112 bus_space_handle_t asich = nsc->sc_asich; 113 u_int8_t romdata[16]; 114 int memsize, i, useword, dmawidth; 115 116 /* 117 * Detect it again unless caller specified it; this gives us 118 * the memory size. 119 */ 120 if (nsc->sc_type == NE2000_TYPE_UNKNOWN) 121 nsc->sc_type = ne2000_detect(nict, nich, asict, asich); 122 123 /* 124 * 8k of memory for NE1000, 16k for NE2000 and 24k for the 125 * card uses DL10019. 126 */ 127 switch (nsc->sc_type) { 128 case NE2000_TYPE_UNKNOWN: 129 default: 130 aprint_error_dev(dsc->sc_dev, "where did the card go?\n"); 131 return (1); 132 case NE2000_TYPE_NE1000: 133 memsize = 8192; 134 useword = 0; 135 dmawidth = NE2000_DMAWIDTH_8BIT; 136 break; 137 case NE2000_TYPE_NE2000: 138 case NE2000_TYPE_AX88190: /* XXX really? */ 139 case NE2000_TYPE_AX88790: 140 memsize = 8192 * 2; 141 useword = 1; 142 dmawidth = NE2000_DMAWIDTH_16BIT; 143 break; 144 case NE2000_TYPE_DL10019: 145 case NE2000_TYPE_DL10022: 146 memsize = 8192 * 3; 147 useword = 1; 148 dmawidth = NE2000_DMAWIDTH_16BIT; 149 break; 150 } 151 152 nsc->sc_useword = useword; 153 if (nsc->sc_dmawidth == NE2000_DMAWIDTH_UNKNOWN) 154 nsc->sc_dmawidth = dmawidth; 155 else 156 dmawidth = nsc->sc_dmawidth; 157 158 dsc->cr_proto = ED_CR_RD2; 159 if (nsc->sc_type == NE2000_TYPE_AX88190 || 160 nsc->sc_type == NE2000_TYPE_AX88790) { 161 dsc->rcr_proto = ED_RCR_INTT; 162 dsc->sc_flags |= DP8390_DO_AX88190_WORKAROUND; 163 } else 164 dsc->rcr_proto = 0; 165 166 /* 167 * DCR gets: 168 * 169 * FIFO threshold to 8, No auto-init Remote DMA, 170 * byte order=80x86. 171 * 172 * NE1000 gets byte-wide DMA, NE2000 gets word-wide DMA. 173 */ 174 dsc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS | 175 ((dmawidth == NE2000_DMAWIDTH_16BIT) ? ED_DCR_WTS : 0); 176 177 dsc->test_mem = ne2000_test_mem; 178 dsc->ring_copy = ne2000_ring_copy; 179 dsc->write_mbuf = ne2000_write_mbuf; 180 dsc->read_hdr = ne2000_read_hdr; 181 182 /* Registers are linear. */ 183 for (i = 0; i < 16; i++) 184 dsc->sc_reg_map[i] = i; 185 186 /* 187 * NIC memory doens't start at zero on an NE board. 188 * The start address is tied to the bus width. 189 * (It happens to be computed the same way as mem size.) 190 */ 191 dsc->mem_start = memsize; 192 193 #ifdef GWETHER 194 { 195 int x, mstart = 0; 196 int8_t pbuf0[ED_PAGE_SIZE], pbuf[ED_PAGE_SIZE], 197 tbuf[ED_PAGE_SIZE]; 198 199 for (i = 0; i < ED_PAGE_SIZE; i++) 200 pbuf0[i] = 0; 201 202 /* Search for the start of RAM. */ 203 for (x = 1; x < 256; x++) { 204 ne2000_writemem(nict, nich, asict, asich, pbuf0, 205 x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword, 0); 206 ne2000_readmem(nict, nich, asict, asich, 207 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword); 208 if (memcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) { 209 for (i = 0; i < ED_PAGE_SIZE; i++) 210 pbuf[i] = 255 - x; 211 ne2000_writemem(nict, nich, asict, asich, 212 pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE, 213 useword, 0); 214 ne2000_readmem(nict, nich, asict, asich, 215 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, 216 useword); 217 if (memcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) { 218 mstart = x << ED_PAGE_SHIFT; 219 memsize = ED_PAGE_SIZE; 220 break; 221 } 222 } 223 } 224 225 if (mstart == 0) { 226 aprint_error_dev(&dsc->sc_dev, "cannot find start of RAM\n"); 227 return (1); 228 } 229 230 /* Search for the end of RAM. */ 231 for (++x; x < 256; x++) { 232 ne2000_writemem(nict, nich, asict, asich, pbuf0, 233 x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword, 0); 234 ne2000_readmem(nict, nich, asict, asich, 235 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword); 236 if (memcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) { 237 for (i = 0; i < ED_PAGE_SIZE; i++) 238 pbuf[i] = 255 - x; 239 ne2000_writemem(nict, nich, asict, asich, 240 pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE, 241 useword, 0); 242 ne2000_readmem(nict, nich, asict, asich, 243 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, 244 useword); 245 if (memcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) 246 memsize += ED_PAGE_SIZE; 247 else 248 break; 249 } else 250 break; 251 } 252 253 printf("%s: RAM start 0x%x, size %d\n", 254 device_xname(&dsc->sc_dev), mstart, memsize); 255 256 dsc->mem_start = mstart; 257 } 258 #endif /* GWETHER */ 259 260 dsc->mem_size = memsize; 261 262 if (myea == NULL) { 263 /* Read the station address. */ 264 if (nsc->sc_type == NE2000_TYPE_AX88190 || 265 nsc->sc_type == NE2000_TYPE_AX88790) { 266 /* Select page 0 registers. */ 267 NIC_BARRIER(nict, nich); 268 bus_space_write_1(nict, nich, ED_P0_CR, 269 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 270 NIC_BARRIER(nict, nich); 271 /* Select word transfer. */ 272 bus_space_write_1(nict, nich, ED_P0_DCR, 273 ((dmawidth == NE2000_DMAWIDTH_16BIT) ? ED_DCR_WTS : 0)); 274 NIC_BARRIER(nict, nich); 275 ne2000_readmem(nict, nich, asict, asich, 276 AX88190_NODEID_OFFSET, dsc->sc_enaddr, 277 ETHER_ADDR_LEN, useword); 278 } else { 279 ne2000_readmem(nict, nich, asict, asich, 0, romdata, 280 sizeof(romdata), useword); 281 for (i = 0; i < ETHER_ADDR_LEN; i++) 282 dsc->sc_enaddr[i] = 283 romdata[i * (useword ? 2 : 1)]; 284 } 285 } else 286 memcpy(dsc->sc_enaddr, myea, sizeof(dsc->sc_enaddr)); 287 288 /* Clear any pending interrupts that might have occurred above. */ 289 NIC_BARRIER(nict, nich); 290 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff); 291 NIC_BARRIER(nict, nich); 292 293 if (dsc->sc_media_init == NULL) 294 dsc->sc_media_init = dp8390_media_init; 295 296 if (dp8390_config(dsc)) { 297 aprint_error_dev(dsc->sc_dev, "setup failed\n"); 298 return (1); 299 } 300 301 return (0); 302 } 303 304 /* 305 * Detect an NE-2000 or compatible. Returns a model code. 306 */ 307 int 308 ne2000_detect(bus_space_tag_t nict, bus_space_handle_t nich, bus_space_tag_t asict, 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 = NE2000_TYPE_UNKNOWN; 313 int dmawidth = NE2000_DMAWIDTH_16BIT; 314 315 restart: 316 /* Reset the board. */ 317 #ifdef GWETHER 318 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, 0); 319 ASIC_BARRIER(asict, asich); 320 delay(200); 321 #endif /* GWETHER */ 322 tmp = bus_space_read_1(asict, asich, NE2000_ASIC_RESET); 323 ASIC_BARRIER(asict, asich); 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 ASIC_BARRIER(asict, asich); 336 delay(5000); 337 338 /* 339 * This is needed because some NE clones apparently don't reset the 340 * NIC properly (or the NIC chip doesn't reset fully on power-up). 341 * XXX - this makes the probe invasive! Done against my better 342 * judgement. -DLG 343 */ 344 bus_space_write_1(nict, nich, ED_P0_CR, 345 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP); 346 NIC_BARRIER(nict, nich); 347 348 delay(5000); 349 350 /* 351 * Generic probe routine for testing for the existence of a DS8390. 352 * Must be performed after the NIC has just been reset. This 353 * works by looking at certain register values that are guaranteed 354 * to be initialized a certain way after power-up or reset. 355 * 356 * Specifically: 357 * 358 * Register reset bits set bits 359 * -------- ---------- -------- 360 * CR TXP, STA RD2, STP 361 * ISR RST 362 * IMR <all> 363 * DCR LAS 364 * TCR LB1, LB0 365 * 366 * We only look at CR and ISR, however, since looking at the others 367 * would require changing register pages, which would be intrusive 368 * if this isn't an 8390. 369 */ 370 371 tmp = bus_space_read_1(nict, nich, ED_P0_CR); 372 if ((tmp & (ED_CR_RD2 | ED_CR_TXP | ED_CR_STA | ED_CR_STP)) != 373 (ED_CR_RD2 | ED_CR_STP)) 374 goto out; 375 376 tmp = bus_space_read_1(nict, nich, ED_P0_ISR); 377 if ((tmp & ED_ISR_RST) != ED_ISR_RST) 378 goto out; 379 380 bus_space_write_1(nict, nich, 381 ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 382 NIC_BARRIER(nict, nich); 383 384 for (i = 0; i < 100; i++) { 385 if ((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RST) == 386 ED_ISR_RST) { 387 /* Ack the reset bit. */ 388 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RST); 389 NIC_BARRIER(nict, nich); 390 break; 391 } 392 delay(100); 393 } 394 395 #if 0 396 /* XXX */ 397 if (i == 100) 398 goto out; 399 #endif 400 401 /* 402 * Test the ability to read and write to the NIC memory. This has 403 * the side effect of determining if this is an NE1000 or an NE2000. 404 */ 405 406 /* 407 * This prevents packets from being stored in the NIC memory when 408 * the readmem routine turns on the start bit in the CR. 409 */ 410 bus_space_write_1(nict, nich, ED_P0_RCR, ED_RCR_MON); 411 NIC_BARRIER(nict, nich); 412 413 /* Temporarily initialize DCR for byte operations. */ 414 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); 415 416 bus_space_write_1(nict, nich, ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT); 417 bus_space_write_1(nict, nich, ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT); 418 419 /* 420 * Write a test pattern in byte mode. If this fails, then there 421 * probably isn't any memory at 8k - which likely means that the 422 * board is an NE2000. 423 */ 424 ne2000_writemem(nict, nich, asict, asich, test_pattern, 8192, 425 sizeof(test_pattern), 0, 1); 426 ne2000_readmem(nict, nich, asict, asich, 8192, test_buffer, 427 sizeof(test_buffer), 0); 428 429 if (memcmp(test_pattern, test_buffer, sizeof(test_pattern))) { 430 /* not an NE1000 - try NE2000 */ 431 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS 432 | ((dmawidth == NE2000_DMAWIDTH_16BIT) ? ED_DCR_WTS : 0)); 433 bus_space_write_1(nict, nich, ED_P0_PSTART, 434 16384 >> ED_PAGE_SHIFT); 435 bus_space_write_1(nict, nich, ED_P0_PSTOP, 436 32768 >> ED_PAGE_SHIFT); 437 438 /* 439 * Write the test pattern in word mode. If this also fails, 440 * then we don't know what this board is. 441 */ 442 ne2000_writemem(nict, nich, asict, asich, test_pattern, 16384, 443 sizeof(test_pattern), 1, 0); 444 ne2000_readmem(nict, nich, asict, asich, 16384, test_buffer, 445 sizeof(test_buffer), 1); 446 447 if (memcmp(test_pattern, test_buffer, sizeof(test_pattern))) { 448 if (dmawidth == NE2000_DMAWIDTH_16BIT) { 449 /* try 8bit dma */ 450 dmawidth = NE2000_DMAWIDTH_8BIT; 451 goto restart; 452 } 453 goto out; /* not an NE2000 either */ 454 } 455 456 rv = NE2000_TYPE_NE2000; 457 } else { 458 /* We're an NE1000. */ 459 rv = NE2000_TYPE_NE1000; 460 dmawidth = NE2000_DMAWIDTH_8BIT; 461 } 462 463 /* Clear any pending interrupts that might have occurred above. */ 464 NIC_BARRIER(nict, nich); 465 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff); 466 467 out: 468 return (rv); 469 } 470 471 /* 472 * Write an mbuf chain to the destination NIC memory address using programmed 473 * I/O. 474 */ 475 int 476 ne2000_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf) 477 { 478 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 479 bus_space_tag_t nict = sc->sc_regt; 480 bus_space_handle_t nich = sc->sc_regh; 481 bus_space_tag_t asict = nsc->sc_asict; 482 bus_space_handle_t asich = nsc->sc_asich; 483 int savelen, padlen; 484 int maxwait = 100; /* about 120us */ 485 486 savelen = m->m_pkthdr.len; 487 if (savelen < ETHER_MIN_LEN - ETHER_CRC_LEN) { 488 padlen = ETHER_MIN_LEN - ETHER_CRC_LEN - savelen; 489 savelen = ETHER_MIN_LEN - ETHER_CRC_LEN; 490 } else 491 padlen = 0; 492 493 494 /* Select page 0 registers. */ 495 NIC_BARRIER(nict, nich); 496 bus_space_write_1(nict, nich, ED_P0_CR, 497 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 498 NIC_BARRIER(nict, nich); 499 500 /* Reset remote DMA complete flag. */ 501 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 502 NIC_BARRIER(nict, nich); 503 504 /* Set up DMA byte count. */ 505 bus_space_write_1(nict, nich, ED_P0_RBCR0, savelen); 506 bus_space_write_1(nict, nich, ED_P0_RBCR1, savelen >> 8); 507 508 /* Set up destination address in NIC mem. */ 509 bus_space_write_1(nict, nich, ED_P0_RSAR0, buf); 510 bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8); 511 512 /* Set remote DMA write. */ 513 NIC_BARRIER(nict, nich); 514 bus_space_write_1(nict, nich, 515 ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 516 NIC_BARRIER(nict, nich); 517 518 /* 519 * Transfer the mbuf chain to the NIC memory. NE2000 cards 520 * require that data be transferred as words, and only words, 521 * so that case requires some extra code to patch over odd-length 522 * mbufs. 523 */ 524 if (nsc->sc_type == NE2000_TYPE_NE1000) { 525 /* NE1000s are easy. */ 526 for (; m != 0; m = m->m_next) { 527 if (m->m_len) { 528 bus_space_write_multi_1(asict, asich, 529 NE2000_ASIC_DATA, mtod(m, u_int8_t *), 530 m->m_len); 531 } 532 } 533 if (padlen) { 534 for(; padlen > 0; padlen--) 535 bus_space_write_1(asict, asich, 536 NE2000_ASIC_DATA, 0); 537 } 538 } else { 539 /* NE2000s are a bit trickier. */ 540 u_int8_t *data, savebyte[2]; 541 int l, leftover; 542 #ifdef DIAGNOSTIC 543 u_int8_t *lim; 544 #endif 545 /* Start out with no leftover data. */ 546 leftover = 0; 547 savebyte[0] = savebyte[1] = 0; 548 549 for (; m != 0; m = m->m_next) { 550 l = m->m_len; 551 if (l == 0) 552 continue; 553 data = mtod(m, u_int8_t *); 554 #ifdef DIAGNOSTIC 555 lim = data + l; 556 #endif 557 while (l > 0) { 558 if (leftover) { 559 /* 560 * Data left over (from mbuf or 561 * realignment). Buffer the next 562 * byte, and write it and the 563 * leftover data out. 564 */ 565 savebyte[1] = *data++; 566 l--; 567 bus_space_write_stream_2(asict, asich, 568 NE2000_ASIC_DATA, 569 *(u_int16_t *)savebyte); 570 leftover = 0; 571 } else if (BUS_SPACE_ALIGNED_POINTER(data, 572 u_int16_t) == 0) { 573 /* 574 * Unaligned data; buffer the next 575 * byte. 576 */ 577 savebyte[0] = *data++; 578 l--; 579 leftover = 1; 580 } else { 581 /* 582 * Aligned data; output contiguous 583 * words as much as we can, then 584 * buffer the remaining byte, if any. 585 */ 586 leftover = l & 1; 587 l &= ~1; 588 bus_space_write_multi_stream_2(asict, 589 asich, NE2000_ASIC_DATA, 590 (u_int16_t *)data, l >> 1); 591 data += l; 592 if (leftover) 593 savebyte[0] = *data++; 594 l = 0; 595 } 596 } 597 if (l < 0) 598 panic("ne2000_write_mbuf: negative len"); 599 #ifdef DIAGNOSTIC 600 if (data != lim) 601 panic("ne2000_write_mbuf: data != lim"); 602 #endif 603 } 604 if (leftover) { 605 savebyte[1] = 0; 606 bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA, 607 *(u_int16_t *)savebyte); 608 } 609 if (padlen) { 610 for(; padlen > 1; padlen -= 2) 611 bus_space_write_stream_2(asict, asich, 612 NE2000_ASIC_DATA, 0); 613 } 614 } 615 NIC_BARRIER(nict, nich); 616 617 /* AX88796 doesn't seem to have remote DMA complete */ 618 if (sc->sc_flags & DP8390_NO_REMOTE_DMA_COMPLETE) 619 return(savelen); 620 621 /* 622 * Wait for remote DMA to complete. This is necessary because on the 623 * transmit side, data is handled internally by the NIC in bursts, and 624 * we can't start another remote DMA until this one completes. Not 625 * waiting causes really bad things to happen - like the NIC wedging 626 * the bus. 627 */ 628 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != 629 ED_ISR_RDC) && --maxwait) { 630 (void)bus_space_read_1(nict, nich, ED_P0_CRDA1); 631 (void)bus_space_read_1(nict, nich, ED_P0_CRDA0); 632 NIC_BARRIER(nict, nich); 633 DELAY(1); 634 } 635 636 if (maxwait == 0) { 637 log(LOG_WARNING, 638 "%s: remote transmit DMA failed to complete\n", 639 device_xname(sc->sc_dev)); 640 dp8390_reset(sc); 641 } 642 643 return (savelen); 644 } 645 646 /* 647 * Given a source and destination address, copy 'amout' of a packet from 648 * the ring buffer into a linear destination buffer. Takes into account 649 * ring-wrap. 650 */ 651 int 652 ne2000_ring_copy(struct dp8390_softc *sc, int src, void *dstv, u_short amount) 653 { 654 char *dst = dstv; 655 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 656 bus_space_tag_t nict = sc->sc_regt; 657 bus_space_handle_t nich = sc->sc_regh; 658 bus_space_tag_t asict = nsc->sc_asict; 659 bus_space_handle_t asich = nsc->sc_asich; 660 u_short tmp_amount; 661 int useword = nsc->sc_useword; 662 663 /* Does copy wrap to lower addr in ring buffer? */ 664 if (src + amount > sc->mem_end) { 665 tmp_amount = sc->mem_end - src; 666 667 /* Copy amount up to end of NIC memory. */ 668 ne2000_readmem(nict, nich, asict, asich, src, 669 (u_int8_t *)dst, tmp_amount, useword); 670 671 amount -= tmp_amount; 672 src = sc->mem_ring; 673 dst += tmp_amount; 674 } 675 676 ne2000_readmem(nict, nich, asict, asich, src, (u_int8_t *)dst, 677 amount, useword); 678 679 return (src + amount); 680 } 681 682 void 683 ne2000_read_hdr(struct dp8390_softc *sc, int buf, struct dp8390_ring *hdr) 684 { 685 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 686 687 ne2000_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich, 688 buf, (u_int8_t *)hdr, sizeof(struct dp8390_ring), 689 nsc->sc_useword); 690 #if BYTE_ORDER == BIG_ENDIAN 691 hdr->count = bswap16(hdr->count); 692 #endif 693 } 694 695 int 696 ne2000_test_mem(struct dp8390_softc *sc) 697 { 698 699 /* Noop. */ 700 return (0); 701 } 702 703 /* 704 * Given a NIC memory source address and a host memory destination address, 705 * copy 'amount' from NIC to host using programmed i/o. The 'amount' is 706 * rounded up to a word - ok as long as mbufs are word sized. 707 */ 708 void 709 ne2000_readmem(bus_space_tag_t nict, bus_space_handle_t nich, bus_space_tag_t asict, bus_space_handle_t asich, int src, u_int8_t *dst, size_t amount, 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 amount = roundup2(amount, sizeof(uint16_t)); 720 721 /* Set up DMA byte count. */ 722 bus_space_write_1(nict, nich, ED_P0_RBCR0, amount); 723 bus_space_write_1(nict, nich, ED_P0_RBCR1, amount >> 8); 724 725 /* Set up source address in NIC mem. */ 726 bus_space_write_1(nict, nich, ED_P0_RSAR0, src); 727 bus_space_write_1(nict, nich, ED_P0_RSAR1, src >> 8); 728 729 NIC_BARRIER(nict, nich); 730 bus_space_write_1(nict, nich, ED_P0_CR, 731 ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA); 732 733 ASIC_BARRIER(asict, asich); 734 if (useword) 735 bus_space_read_multi_stream_2(asict, asich, NE2000_ASIC_DATA, 736 (u_int16_t *)dst, amount >> 1); 737 else 738 bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA, 739 dst, amount); 740 } 741 742 /* 743 * Stripped down routine for writing a linear buffer to NIC memory. Only 744 * used in the probe routine to test the memory. 'len' must be even. 745 */ 746 void 747 ne2000_writemem(bus_space_tag_t nict, bus_space_handle_t nich, bus_space_tag_t asict, bus_space_handle_t asich, u_int8_t *src, int dst, size_t len, int useword, int quiet) 748 { 749 int maxwait = 100; /* about 120us */ 750 751 /* Select page 0 registers. */ 752 NIC_BARRIER(nict, nich); 753 bus_space_write_1(nict, nich, ED_P0_CR, 754 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 755 NIC_BARRIER(nict, nich); 756 757 /* Reset remote DMA complete flag. */ 758 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 759 NIC_BARRIER(nict, nich); 760 761 /* Set up DMA byte count. */ 762 bus_space_write_1(nict, nich, ED_P0_RBCR0, len); 763 bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8); 764 765 /* Set up destination address in NIC mem. */ 766 bus_space_write_1(nict, nich, ED_P0_RSAR0, dst); 767 bus_space_write_1(nict, nich, ED_P0_RSAR1, dst >> 8); 768 769 /* Set remote DMA write. */ 770 NIC_BARRIER(nict, nich); 771 bus_space_write_1(nict, nich, ED_P0_CR, 772 ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 773 NIC_BARRIER(nict, nich); 774 775 ASIC_BARRIER(asict, asich); 776 if (useword) 777 bus_space_write_multi_stream_2(asict, asich, NE2000_ASIC_DATA, 778 (u_int16_t *)src, len >> 1); 779 else 780 bus_space_write_multi_1(asict, asich, NE2000_ASIC_DATA, 781 src, len); 782 ASIC_BARRIER(asict, asich); 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(struct ne2000_softc *sc, int flags) 801 { 802 803 return (dp8390_detach(&sc->sc_dp8390, flags)); 804 } 805 806 #ifdef IPKDB_NE 807 /* 808 * This code is essentially the same as ne2000_attach above. 809 */ 810 int 811 ne2000_ipkdb_attach(struct ipkdb_if *kip) 812 { 813 struct ne2000_softc *np = kip->port; 814 struct dp8390_softc *dp = &np->sc_dp8390; 815 bus_space_tag_t nict = dp->sc_regt; 816 bus_space_handle_t nich = dp->sc_regh; 817 int i, useword, dmawidth; 818 819 #ifdef GWETHER 820 /* Not supported (yet?) */ 821 return -1; 822 #endif 823 824 if (np->sc_type == NE2000_TYPE_UNKNOWN) 825 np->sc_type = ne2000_detect(nict, nich, 826 np->sc_asict, np->sc_asich); 827 if (np->sc_type == NE2000_TYPE_UNKNOWN) 828 return -1; 829 830 useword = np->sc_useword; 831 dmawidth = np->sc_dmawidth; 832 833 dp->cr_proto = ED_CR_RD2; 834 dp->dcr_reg = ED_DCR_FT1 | ED_DCR_LS | 835 ((dmawidth == NE2000_DMAWIDTH_16BIT) ? ED_DCR_WTS : 0); 836 dp->rcr_proto = 0; 837 838 dp->test_mem = ne2000_test_mem; 839 dp->ring_copy = ne2000_ring_copy; 840 dp->write_mbuf = ne2000_write_mbuf; 841 dp->read_hdr = ne2000_read_hdr; 842 843 for (i = 0; i < 16; i++) 844 dp->sc_reg_map[i] = i; 845 846 switch (np->sc_type) { 847 case NE2000_TYPE_NE1000: 848 dp->mem_start = dp->mem_size = 8192; 849 kip->name = "ne1000"; 850 break; 851 case NE2000_TYPE_NE2000: 852 dp->mem_start = dp->mem_size = 8192 * 2; 853 kip->name = "ne2000"; 854 break; 855 case NE2000_TYPE_DL10019: 856 case NE2000_TYPE_DL10022: 857 dp->mem_start = dp->mem_size = 8192 * 3; 858 kip->name = (np->sc_type == NE2000_TYPE_DL10019) ? 859 "dl10022" : "dl10019"; 860 break; 861 case NE2000_TYPE_AX88190: 862 case NE2000_TYPE_AX88790: 863 dp->rcr_proto = ED_RCR_INTT; 864 dp->sc_flags |= DP8390_DO_AX88190_WORKAROUND; 865 dp->mem_start = dp->mem_size = 8192 * 2; 866 kip->name = "ax88190"; 867 break; 868 default: 869 return -1; 870 break; 871 } 872 873 if (dp8390_ipkdb_attach(kip)) 874 return -1; 875 876 dp->mem_ring = dp->mem_start 877 + ((dp->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); 878 879 if (!(kip->flags & IPKDB_MYHW)) { 880 char romdata[16]; 881 882 /* Read the station address. */ 883 if (np->sc_type == NE2000_TYPE_AX88190 || 884 np->sc_type == NE2000_TYPE_AX88790) { 885 /* Select page 0 registers. */ 886 NIC_BARRIER(nict, nich); 887 bus_space_write_1(nict, nich, ED_P0_CR, 888 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 889 NIC_BARRIER(nict, nich); 890 /* Select word transfer */ 891 bus_space_write_1(nict, nich, ED_P0_DCR, 892 ((dmawidth == NE2000_DMAWIDTH_16BIT) ? ED_DCR_WTS : 0)); 893 ne2000_readmem(nict, nich, np->sc_asict, np->sc_asich, 894 AX88190_NODEID_OFFSET, kip->myenetaddr, 895 ETHER_ADDR_LEN, useword); 896 } else { 897 ne2000_readmem(nict, nich, np->sc_asict, np->sc_asich, 898 0, romdata, sizeof romdata, useword); 899 for (i = 0; i < ETHER_ADDR_LEN; i++) 900 kip->myenetaddr[i] = romdata[i << useword]; 901 } 902 kip->flags |= IPKDB_MYHW; 903 904 } 905 dp8390_stop(dp); 906 907 return 0; 908 } 909 #endif 910 911 bool 912 ne2000_suspend(device_t self, const pmf_qual_t *qual) 913 { 914 struct ne2000_softc *sc = device_private(self); 915 struct dp8390_softc *dsc = &sc->sc_dp8390; 916 int s; 917 918 s = splnet(); 919 920 dp8390_stop(dsc); 921 dp8390_disable(dsc); 922 923 splx(s); 924 return true; 925 } 926 927 bool 928 ne2000_resume(device_t self, const pmf_qual_t *qual) 929 { 930 struct ne2000_softc *sc = device_private(self); 931 struct dp8390_softc *dsc = &sc->sc_dp8390; 932 struct ifnet *ifp = &dsc->sc_ec.ec_if; 933 int s; 934 935 s = splnet(); 936 937 if (ifp->if_flags & IFF_UP) { 938 if (dp8390_enable(dsc) == 0) 939 dp8390_init(dsc); 940 } 941 942 splx(s); 943 return true; 944 } 945
Indexes created Wed Sep 24 05:09:52 GMT 2025