if_ep.c revision 33108
1/* 2 * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Herb Peyerl. 16 * 4. The name of Herb Peyerl may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * if_ep.c,v 1.19 1995/01/24 20:53:45 davidg Exp 31 */ 32 33/* 34 * Modified from the FreeBSD 1.1.5.1 version by: 35 * Andres Vega Garcia 36 * INRIA - Sophia Antipolis, France 37 * avega@sophia.inria.fr 38 */ 39 40/* 41 * $Id: if_ep.c,v 1.70 1998/01/08 23:40:50 eivind Exp $ 42 * 43 * Promiscuous mode added and interrupt logic slightly changed 44 * to reduce the number of adapter failures. Transceiver select 45 * logic changed to use value from EEPROM. Autoconfiguration 46 * features added. 47 * Done by: 48 * Serge Babkin 49 * Chelindbank (Chelyabinsk, Russia) 50 * babkin@hq.icb.chel.su 51 */ 52 53/* 54 * Pccard support for 3C589 by: 55 * HAMADA Naoki 56 * nao@tom-yam.or.jp 57 */ 58 59#include "ep.h" 60#if NEP > 0 61 62#include "bpfilter.h" 63#include "opt_diagnostic.h" 64#include "opt_inet.h" 65#include "opt_ipx.h" 66 67#include <sys/param.h> 68#if defined(__FreeBSD__) 69#include <sys/kernel.h> 70#include <sys/systm.h> 71#include <sys/conf.h> 72#endif 73#include <sys/malloc.h> 74#include <sys/mbuf.h> 75#include <sys/socket.h> 76#include <sys/sockio.h> 77#if defined(__NetBSD__) 78#include <sys/select.h> 79#endif 80 81#include <net/if.h> 82 83#if defined(__FreeBSD__) 84#include <net/ethernet.h> 85#include <net/if_arp.h> 86#endif 87 88#ifdef INET 89#include <netinet/in.h> 90#include <netinet/if_ether.h> 91#endif 92 93#ifdef IPX 94#include <netipx/ipx.h> 95#include <netipx/ipx_if.h> 96#endif 97 98#ifdef NS 99#include <netns/ns.h> 100#include <netns/ns_if.h> 101#endif 102 103#if NBPFILTER > 0 104#include <net/bpf.h> 105#endif 106 107#if defined(__FreeBSD__) 108#include <machine/clock.h> 109#endif 110 111#include <i386/isa/isa_device.h> 112#include <i386/isa/if_epreg.h> 113#include <i386/isa/elink.h> 114 115/* Exported variables */ 116u_long ep_unit; 117int ep_boards; 118struct ep_board ep_board[EP_MAX_BOARDS + 1]; 119 120static int eeprom_rdy __P((struct ep_softc *sc)); 121 122static int ep_isa_probe __P((struct isa_device *)); 123static struct ep_board * ep_look_for_board_at __P((struct isa_device *is)); 124static int ep_isa_attach __P((struct isa_device *)); 125static int epioctl __P((struct ifnet * ifp, int, caddr_t)); 126 127static void epinit __P((struct ep_softc *)); 128static void epread __P((struct ep_softc *)); 129void epreset __P((int)); 130static void epstart __P((struct ifnet *)); 131static void epstop __P((struct ep_softc *)); 132static void epwatchdog __P((struct ifnet *)); 133 134#if 0 135static int send_ID_sequence __P((int)); 136#endif 137static int get_eeprom_data __P((int, int)); 138 139static struct ep_softc* ep_softc[NEP]; 140static int ep_current_tag = EP_LAST_TAG + 1; 141static char *ep_conn_type[] = {"UTP", "AUI", "???", "BNC"}; 142 143#define ep_ftst(f) (sc->stat&(f)) 144#define ep_fset(f) (sc->stat|=(f)) 145#define ep_frst(f) (sc->stat&=~(f)) 146 147struct isa_driver epdriver = { 148 ep_isa_probe, 149 ep_isa_attach, 150 "ep", 151 0 152}; 153 154#include "card.h" 155 156#if NCARD > 0 157#include <sys/select.h> 158#include <pccard/cardinfo.h> 159#include <pccard/driver.h> 160#include <pccard/slot.h> 161 162/* 163 * PC-Card (PCMCIA) specific code. 164 */ 165static int ep_pccard_init __P((struct pccard_devinfo *)); 166static int ep_pccard_attach __P((struct pccard_devinfo *)); 167static void ep_unload __P((struct pccard_devinfo *)); 168static int card_intr __P((struct pccard_devinfo *)); 169 170static struct pccard_device ep_info = { 171 "ep", 172 ep_pccard_init, 173 ep_unload, 174 card_intr, 175 0, /* Attributes - presently unused */ 176 &net_imask 177}; 178 179DATA_SET(pccarddrv_set, ep_info); 180 181/* 182 * Initialize the device - called from Slot manager. 183 */ 184static int 185ep_pccard_init(devi) 186 struct pccard_devinfo *devi; 187{ 188 struct isa_device *is = &devi->isahd; 189 struct ep_softc *sc = ep_softc[is->id_unit]; 190 struct ep_board *epb; 191 int i; 192 193 epb = &ep_board[is->id_unit]; 194 195 if (sc == 0) { 196 if ((sc = ep_alloc(is->id_unit, epb)) == 0) { 197 return (ENXIO); 198 } 199 ep_unit++; 200 } 201 202 /* get_e() requires these. */ 203 sc->ep_io_addr = is->id_iobase; 204 sc->unit = is->id_unit; 205 206 epb->epb_addr = is->id_iobase; 207 epb->epb_used = 1; 208 epb->prod_id = get_e(sc, EEPROM_PROD_ID); 209 210 /* 3C589's product id? */ 211 if (epb->prod_id != 0x9058) { 212 printf("ep%d: failed to come ready.\n", is->id_unit); 213 return (ENXIO); 214 } 215 216 epb->res_cfg = get_e(sc, EEPROM_RESOURCE_CFG); 217 for (i = 0; i < 3; i++) 218 sc->epb->eth_addr[i] = get_e(sc, EEPROM_NODE_ADDR_0 + i); 219 220 if (ep_pccard_attach(devi) == 0) 221 return (ENXIO); 222 223 sc->arpcom.ac_if.if_snd.ifq_maxlen = ifqmaxlen; 224 return (0); 225} 226 227static int 228ep_pccard_attach(devi) 229 struct pccard_devinfo *devi; 230{ 231 struct isa_device *is = &devi->isahd; 232 struct ep_softc *sc = ep_softc[is->id_unit]; 233 u_short config; 234 235 sc->ep_connectors = 0; 236 config = inw(IS_BASE + EP_W0_CONFIG_CTRL); 237 if (config & IS_BNC) { 238 sc->ep_connectors |= BNC; 239 } 240 if (config & IS_UTP) { 241 sc->ep_connectors |= UTP; 242 } 243 if (!(sc->ep_connectors & 7)) 244 printf("no connectors!"); 245 sc->ep_connector = inw(BASE + EP_W0_ADDRESS_CFG) >> ACF_CONNECTOR_BITS; 246 247 /* ROM size = 0, ROM base = 0 */ 248 /* For now, ignore AUTO SELECT feature of 3C589B and later. */ 249 outw(BASE + EP_W0_ADDRESS_CFG, get_e(sc, EEPROM_ADDR_CFG) & 0xc000); 250 251 /* Fake IRQ must be 3 */ 252 outw(BASE + EP_W0_RESOURCE_CFG, (sc->epb->res_cfg & 0x0fff) | 0x3000); 253 254 outw(BASE + EP_W0_PRODUCT_ID, sc->epb->prod_id); 255 256 ep_attach(sc); 257 258 return 1; 259} 260 261static void 262ep_unload(devi) 263 struct pccard_devinfo *devi; 264{ 265 struct ep_softc *sc = ep_softc[devi->isahd.id_unit]; 266 267 if (sc->gone) { 268 printf("ep%d: already unloaded\n", devi->isahd.id_unit); 269 return; 270 } 271 sc->arpcom.ac_if.if_flags &= ~IFF_RUNNING; 272 sc->gone = 1; 273 printf("ep%d: unload\n", devi->isahd.id_unit); 274} 275 276/* 277 * card_intr - Shared interrupt called from 278 * front end of PC-Card handler. 279 */ 280static int 281card_intr(devi) 282 struct pccard_devinfo *devi; 283{ 284 epintr(devi->isahd.id_unit); 285 return(1); 286} 287#endif /* NCARD > 0 */ 288 289static int 290eeprom_rdy(sc) 291 struct ep_softc *sc; 292{ 293 int i; 294 295 for (i = 0; is_eeprom_busy(BASE) && i < MAX_EEPROMBUSY; i++) 296 continue; 297 if (i >= MAX_EEPROMBUSY) { 298 printf("ep%d: eeprom failed to come ready.\n", sc->unit); 299 return (0); 300 } 301 return (1); 302} 303 304static struct ep_board * 305ep_look_for_board_at(is) 306 struct isa_device *is; 307{ 308 int data, i, j, id_port = ELINK_ID_PORT; 309 int count = 0; 310 311 if (ep_current_tag == (EP_LAST_TAG + 1)) { 312 /* Come here just one time */ 313 314 ep_current_tag--; 315 316 /* Look for the ISA boards. Init and leave them actived */ 317 outb(id_port, 0); 318 outb(id_port, 0); 319 320 elink_idseq(0xCF); 321 322 elink_reset(); 323 DELAY(10000); 324 for (i = 0; i < EP_MAX_BOARDS; i++) { 325 outb(id_port, 0); 326 outb(id_port, 0); 327 elink_idseq(0xCF); 328 329 data = get_eeprom_data(id_port, EEPROM_MFG_ID); 330 if (data != MFG_ID) 331 break; 332 333 /* resolve contention using the Ethernet address */ 334 335 for (j = 0; j < 3; j++) 336 get_eeprom_data(id_port, j); 337 338 /* and save this address for later use */ 339 340 for (j = 0; j < 3; j++) 341 ep_board[ep_boards].eth_addr[j] = get_eeprom_data(id_port, j); 342 343 ep_board[ep_boards].res_cfg = 344 get_eeprom_data(id_port, EEPROM_RESOURCE_CFG); 345 346 ep_board[ep_boards].prod_id = 347 get_eeprom_data(id_port, EEPROM_PROD_ID); 348 349 ep_board[ep_boards].epb_used = 0; 350#ifdef PC98 351 ep_board[ep_boards].epb_addr = 352 (get_eeprom_data(id_port, EEPROM_ADDR_CFG) & 0x1f) * 0x100 + 0x40d0; 353#else 354 ep_board[ep_boards].epb_addr = 355 (get_eeprom_data(id_port, EEPROM_ADDR_CFG) & 0x1f) * 0x10 + 0x200; 356 357 if (ep_board[ep_boards].epb_addr > 0x3E0) 358 /* Board in EISA configuration mode */ 359 continue; 360#endif /* PC98 */ 361 362 outb(id_port, ep_current_tag); /* tags board */ 363 outb(id_port, ACTIVATE_ADAPTER_TO_CONFIG); 364 ep_boards++; 365 count++; 366 ep_current_tag--; 367 } 368 369 ep_board[ep_boards].epb_addr = 0; 370 if (count) { 371 printf("%d 3C5x9 board(s) on ISA found at", count); 372 for (j = 0; ep_board[j].epb_addr; j++) 373 if (ep_board[j].epb_addr <= 0x3E0) 374 printf(" 0x%x", ep_board[j].epb_addr); 375 printf("\n"); 376 } 377 } 378 379 /* we have two cases: 380 * 381 * 1. Device was configured with 'port ?' 382 * In this case we search for the first unused card in list 383 * 384 * 2. Device was configured with 'port xxx' 385 * In this case we search for the unused card with that address 386 * 387 */ 388 389 if (IS_BASE == -1) { /* port? */ 390 for (i = 0; ep_board[i].epb_addr && ep_board[i].epb_used; i++) 391 ; 392 if (ep_board[i].epb_addr == 0) 393 return 0; 394 395 IS_BASE = ep_board[i].epb_addr; 396 ep_board[i].epb_used = 1; 397 398 return &ep_board[i]; 399 } else { 400 for (i = 0; 401 ep_board[i].epb_addr && ep_board[i].epb_addr != IS_BASE; 402 i++) 403 ; 404 405 if (ep_board[i].epb_used || ep_board[i].epb_addr != IS_BASE) 406 return 0; 407 408 if (inw(IS_BASE + EP_W0_EEPROM_COMMAND) & EEPROM_TST_MODE) { 409 printf("ep%d: 3c5x9 at 0x%x in PnP mode. Disable PnP mode!\n", 410 is->id_unit, IS_BASE); 411 } 412 ep_board[i].epb_used = 1; 413 414 return &ep_board[i]; 415 } 416} 417 418/* 419 * get_e: gets a 16 bits word from the EEPROM. we must have set the window 420 * before 421 */ 422u_int16_t 423get_e(sc, offset) 424 struct ep_softc *sc; 425 int offset; 426{ 427 if (!eeprom_rdy(sc)) 428 return (0xffff); 429 outw(BASE + EP_W0_EEPROM_COMMAND, EEPROM_CMD_RD | offset); 430 if (!eeprom_rdy(sc)) 431 return (0xffff); 432 return (inw(BASE + EP_W0_EEPROM_DATA)); 433} 434 435struct ep_softc * 436ep_alloc(unit, epb) 437 int unit; 438 struct ep_board *epb; 439{ 440 struct ep_softc *sc; 441 442 if (unit >= NEP) { 443 printf("ep: unit number (%d) too high\n", unit); 444 return NULL; 445 } 446 447 /* 448 * Allocate a storage area for us 449 */ 450 if (ep_softc[unit]) { 451 printf("ep%d: unit number already allocated to another " 452 "adaptor\n", unit); 453 return NULL; 454 } 455 456 sc = malloc(sizeof(struct ep_softc), M_DEVBUF, M_NOWAIT); 457 if (!sc) { 458 printf("ep%d: cannot malloc!\n", unit); 459 return NULL; 460 } 461 bzero(sc, sizeof(struct ep_softc)); 462 ep_softc[unit] = sc; 463 sc->unit = unit; 464 sc->ep_io_addr = epb->epb_addr; 465 sc->epb = epb; 466 467 return(sc); 468} 469 470void 471ep_free(sc) 472 struct ep_softc *sc; 473{ 474 ep_softc[sc->unit] = NULL; 475 free(sc, M_DEVBUF); 476 return; 477} 478 479int 480ep_isa_probe(is) 481 struct isa_device *is; 482{ 483 struct ep_softc *sc; 484 struct ep_board *epb; 485 u_short k; 486 487 if ((epb = ep_look_for_board_at(is)) == 0) 488 return (0); 489 490 /* 491 * Allocate a storage area for us 492 */ 493 sc = ep_alloc(ep_unit, epb); 494 if (!sc) 495 return (0); 496 497 is->id_unit = ep_unit++; 498 499 /* 500 * The iobase was found and MFG_ID was 0x6d50. PROD_ID should be 501 * 0x9[0-f]50 (IBM-PC) 502 * 0x9[0-f]5[0-f] (PC-98) 503 */ 504 GO_WINDOW(0); 505 k = sc->epb->prod_id; 506#ifdef PC98 507 if ((k & 0xf0f0) != (PROD_ID & 0xf0f0)) { 508#else 509 if ((k & 0xf0ff) != (PROD_ID & 0xf0ff)) { 510#endif 511 printf("ep_isa_probe: ignoring model %04x\n", k); 512 ep_free(sc); 513 return (0); 514 } 515 516 k = sc->epb->res_cfg; 517 518 k >>= 12; 519 520 /* Now we have two cases again: 521 * 522 * 1. Device was configured with 'irq?' 523 * In this case we use irq read from the board 524 * 525 * 2. Device was configured with 'irq xxx' 526 * In this case we set up the board to use specified interrupt 527 * 528 */ 529 530 if (is->id_irq == 0) { /* irq? */ 531 is->id_irq = 1 << ((k == 2) ? 9 : k); 532 } 533 534 sc->stat = 0; /* 16 bit access */ 535 536 /* By now, the adapter is already activated */ 537 538 return (EP_IOSIZE); /* 16 bytes of I/O space used. */ 539} 540 541static int 542ep_isa_attach(is) 543 struct isa_device *is; 544{ 545 struct ep_softc *sc = ep_softc[is->id_unit]; 546 u_short config; 547 int irq; 548 549 sc->ep_connectors = 0; 550 config = inw(IS_BASE + EP_W0_CONFIG_CTRL); 551 if (config & IS_AUI) { 552 sc->ep_connectors |= AUI; 553 } 554 if (config & IS_BNC) { 555 sc->ep_connectors |= BNC; 556 } 557 if (config & IS_UTP) { 558 sc->ep_connectors |= UTP; 559 } 560 if (!(sc->ep_connectors & 7)) 561 printf("no connectors!"); 562 sc->ep_connector = inw(BASE + EP_W0_ADDRESS_CFG) >> ACF_CONNECTOR_BITS; 563 /* 564 * Write IRQ value to board 565 */ 566 567 irq = ffs(is->id_irq) - 1; 568 if (irq == -1) { 569 printf(" invalid irq... cannot attach\n"); 570 return 0; 571 } 572 573 GO_WINDOW(0); 574 SET_IRQ(BASE, irq); 575 576 ep_attach(sc); 577 return 1; 578} 579 580int 581ep_attach(sc) 582 struct ep_softc *sc; 583{ 584 struct ifnet *ifp = &sc->arpcom.ac_if; 585 u_short *p; 586 int i; 587 int attached; 588 589 sc->gone = 0; 590 attached = (ifp->if_softc != 0); 591 592 printf("ep%d: ", sc->unit); 593 /* 594 * Current media type 595 */ 596 if (sc->ep_connectors & AUI) { 597 printf("aui"); 598 if (sc->ep_connectors & ~AUI) 599 printf("/"); 600 } 601 if (sc->ep_connectors & UTP) { 602 printf("utp"); 603 if (sc->ep_connectors & BNC) 604 printf("/"); 605 } 606 if (sc->ep_connectors & BNC) { 607 printf("bnc"); 608 } 609 610 printf("[*%s*]", ep_conn_type[sc->ep_connector]); 611 612 /* 613 * Setup the station address 614 */ 615 p = (u_short *) & sc->arpcom.ac_enaddr; 616 GO_WINDOW(2); 617 for (i = 0; i < 3; i++) { 618 p[i] = htons(sc->epb->eth_addr[i]); 619 outw(BASE + EP_W2_ADDR_0 + (i * 2), ntohs(p[i])); 620 } 621 printf(" address %6D\n", sc->arpcom.ac_enaddr, ":"); 622 623 ifp->if_softc = sc; 624 ifp->if_unit = sc->unit; 625 ifp->if_name = "ep"; 626 ifp->if_mtu = ETHERMTU; 627 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 628 ifp->if_output = ether_output; 629 ifp->if_start = epstart; 630 ifp->if_ioctl = epioctl; 631 ifp->if_watchdog = epwatchdog; 632 633 if (!attached) { 634 if_attach(ifp); 635 ether_ifattach(ifp); 636 } 637 638#ifdef EP_LOCAL_STATS 639 sc->rx_no_first = sc->rx_no_mbuf = 640 sc->rx_bpf_disc = sc->rx_overrunf = sc->rx_overrunl = 641 sc->tx_underrun = 0; 642#endif 643 ep_fset(F_RX_FIRST); 644 sc->top = sc->mcur = 0; 645 646#if NBPFILTER > 0 647 if (!attached) { 648 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 649 } 650#endif 651 return 0; 652} 653 654 655/* 656 * The order in here seems important. Otherwise we may not receive 657 * interrupts. ?! 658 */ 659static void 660epinit(sc) 661 struct ep_softc *sc; 662{ 663 register struct ifnet *ifp = &sc->arpcom.ac_if; 664 int s, i, j; 665 666 if (sc->gone) 667 return; 668 669 /* 670 if (ifp->if_addrlist == (struct ifaddr *) 0) 671 return; 672 */ 673 674 s = splimp(); 675 while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); 676 677 GO_WINDOW(0); 678 outw(BASE + EP_COMMAND, STOP_TRANSCEIVER); 679 GO_WINDOW(4); 680 outw(BASE + EP_W4_MEDIA_TYPE, DISABLE_UTP); 681 GO_WINDOW(0); 682 683 /* Disable the card */ 684 outw(BASE + EP_W0_CONFIG_CTRL, 0); 685 686 /* Enable the card */ 687 outw(BASE + EP_W0_CONFIG_CTRL, ENABLE_DRQ_IRQ); 688 689 GO_WINDOW(2); 690 691 /* Reload the ether_addr. */ 692 for (i = 0; i < 6; i++) 693 outb(BASE + EP_W2_ADDR_0 + i, sc->arpcom.ac_enaddr[i]); 694 695 outw(BASE + EP_COMMAND, RX_RESET); 696 outw(BASE + EP_COMMAND, TX_RESET); 697 while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); 698 699 /* Window 1 is operating window */ 700 GO_WINDOW(1); 701 for (i = 0; i < 31; i++) 702 inb(BASE + EP_W1_TX_STATUS); 703 704 /* get rid of stray intr's */ 705 outw(BASE + EP_COMMAND, ACK_INTR | 0xff); 706 707 outw(BASE + EP_COMMAND, SET_RD_0_MASK | S_5_INTS); 708 709 outw(BASE + EP_COMMAND, SET_INTR_MASK | S_5_INTS); 710 711 if (ifp->if_flags & IFF_PROMISC) 712 outw(BASE + EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL | 713 FIL_GROUP | FIL_BRDCST | FIL_ALL); 714 else 715 outw(BASE + EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL | 716 FIL_GROUP | FIL_BRDCST); 717 718 /* 719 * S.B. 720 * 721 * Now behavior was slightly changed: 722 * 723 * if any of flags link[0-2] is used and its connector is 724 * physically present the following connectors are used: 725 * 726 * link0 - AUI * highest precedence 727 * link1 - BNC 728 * link2 - UTP * lowest precedence 729 * 730 * If none of them is specified then 731 * connector specified in the EEPROM is used 732 * (if present on card or AUI if not). 733 * 734 */ 735 736 /* Set the xcvr. */ 737 if (ifp->if_flags & IFF_LINK0 && sc->ep_connectors & AUI) { 738 i = ACF_CONNECTOR_AUI; 739 } else if (ifp->if_flags & IFF_LINK1 && sc->ep_connectors & BNC) { 740 i = ACF_CONNECTOR_BNC; 741 } else if (ifp->if_flags & IFF_LINK2 && sc->ep_connectors & UTP) { 742 i = ACF_CONNECTOR_UTP; 743 } else { 744 i = sc->ep_connector; 745 } 746 GO_WINDOW(0); 747 j = inw(BASE + EP_W0_ADDRESS_CFG) & 0x3fff; 748 outw(BASE + EP_W0_ADDRESS_CFG, j | (i << ACF_CONNECTOR_BITS)); 749 750 switch(i) { 751 case ACF_CONNECTOR_UTP: 752 if (sc->ep_connectors & UTP) { 753 GO_WINDOW(4); 754 outw(BASE + EP_W4_MEDIA_TYPE, ENABLE_UTP); 755 } 756 break; 757 case ACF_CONNECTOR_BNC: 758 if (sc->ep_connectors & BNC) { 759 outw(BASE + EP_COMMAND, START_TRANSCEIVER); 760 DELAY(1000); 761 } 762 break; 763 case ACF_CONNECTOR_AUI: 764 /* nothing to do */ 765 break; 766 default: 767 printf("ep%d: strange connector type in EEPROM: assuming AUI\n", 768 sc->unit); 769 break; 770 } 771 772 outw(BASE + EP_COMMAND, RX_ENABLE); 773 outw(BASE + EP_COMMAND, TX_ENABLE); 774 775 ifp->if_flags |= IFF_RUNNING; 776 ifp->if_flags &= ~IFF_OACTIVE; /* just in case */ 777 778#ifdef EP_LOCAL_STATS 779 sc->rx_no_first = sc->rx_no_mbuf = 780 sc->rx_bpf_disc = sc->rx_overrunf = sc->rx_overrunl = 781 sc->tx_underrun = 0; 782#endif 783 ep_fset(F_RX_FIRST); 784 if (sc->top) { 785 m_freem(sc->top); 786 sc->top = sc->mcur = 0; 787 } 788 outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH); 789 outw(BASE + EP_COMMAND, SET_TX_START_THRESH | 16); 790 791 /* 792 * Store up a bunch of mbuf's for use later. (MAX_MBS). First we free up 793 * any that we had in case we're being called from intr or somewhere 794 * else. 795 */ 796 797 GO_WINDOW(1); 798 epstart(ifp); 799 800 splx(s); 801} 802 803static const char padmap[] = {0, 3, 2, 1}; 804 805static void 806epstart(ifp) 807 struct ifnet *ifp; 808{ 809 register struct ep_softc *sc = ifp->if_softc; 810 register u_int len; 811 register struct mbuf *m; 812 struct mbuf *top; 813 int s, pad; 814 815 if (sc->gone) { 816 return; 817 } 818 819 s = splimp(); 820 while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); 821 if (ifp->if_flags & IFF_OACTIVE) { 822 splx(s); 823 return; 824 } 825startagain: 826 /* Sneak a peek at the next packet */ 827 m = ifp->if_snd.ifq_head; 828 if (m == 0) { 829 splx(s); 830 return; 831 } 832 for (len = 0, top = m; m; m = m->m_next) 833 len += m->m_len; 834 835 pad = padmap[len & 3]; 836 837 /* 838 * The 3c509 automatically pads short packets to minimum ethernet length, 839 * but we drop packets that are too large. Perhaps we should truncate 840 * them instead? 841 */ 842 if (len + pad > ETHER_MAX_LEN) { 843 /* packet is obviously too large: toss it */ 844 ++ifp->if_oerrors; 845 IF_DEQUEUE(&ifp->if_snd, m); 846 m_freem(m); 847 goto readcheck; 848 } 849 if (inw(BASE + EP_W1_FREE_TX) < len + pad + 4) { 850 /* no room in FIFO */ 851 outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | (len + pad + 4)); 852 /* make sure */ 853 if (inw(BASE + EP_W1_FREE_TX) < len + pad + 4) { 854 ifp->if_flags |= IFF_OACTIVE; 855 splx(s); 856 return; 857 } 858 } 859 IF_DEQUEUE(&ifp->if_snd, m); 860 861 outw(BASE + EP_W1_TX_PIO_WR_1, len); 862 outw(BASE + EP_W1_TX_PIO_WR_1, 0x0); /* Second dword meaningless */ 863 864 for (top = m; m != 0; m = m->m_next) 865 if (ep_ftst(F_ACCESS_32_BITS)) { 866 outsl(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t), 867 m->m_len / 4); 868 if (m->m_len & 3) 869 outsb(BASE + EP_W1_TX_PIO_WR_1, 870 mtod(m, caddr_t) + (m->m_len & (~3)), 871 m->m_len & 3); 872 } else { 873 outsw(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 2); 874 if (m->m_len & 1) 875 outb(BASE + EP_W1_TX_PIO_WR_1, 876 *(mtod(m, caddr_t) + m->m_len - 1)); 877 } 878 879 while (pad--) 880 outb(BASE + EP_W1_TX_PIO_WR_1, 0); /* Padding */ 881 882#if NBPFILTER > 0 883 if (ifp->if_bpf) { 884 bpf_mtap(ifp, top); 885 } 886#endif 887 888 ifp->if_timer = 2; 889 ifp->if_opackets++; 890 m_freem(top); 891 892 /* 893 * Is another packet coming in? We don't want to overflow the tiny RX 894 * fifo. 895 */ 896readcheck: 897 if (inw(BASE + EP_W1_RX_STATUS) & RX_BYTES_MASK) { 898 /* 899 * we check if we have packets left, in that case we prepare to come 900 * back later 901 */ 902 if (ifp->if_snd.ifq_head) { 903 outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | 8); 904 } 905 splx(s); 906 return; 907 } 908 goto startagain; 909} 910 911void 912epintr(unit) 913 int unit; 914{ 915 register struct ep_softc *sc = ep_softc[unit]; 916 917 if (sc->gone) { 918 return; 919 } 920 921 ep_intr(sc); 922} 923 924void 925ep_intr(arg) 926 void *arg; 927{ 928 struct ep_softc *sc; 929 register int status; 930 struct ifnet *ifp; 931 int x; 932 933 x = splbio(); 934 935 sc = (struct ep_softc *)arg; 936 937 ifp = &sc->arpcom.ac_if; 938 939 outw(BASE + EP_COMMAND, SET_INTR_MASK); /* disable all Ints */ 940 941rescan: 942 943 while ((status = inw(BASE + EP_STATUS)) & S_5_INTS) { 944 945 /* first acknowledge all interrupt sources */ 946 outw(BASE + EP_COMMAND, ACK_INTR | (status & S_MASK)); 947 948 if (status & (S_RX_COMPLETE | S_RX_EARLY)) { 949 epread(sc); 950 continue; 951 } 952 if (status & S_TX_AVAIL) { 953 /* we need ACK */ 954 ifp->if_timer = 0; 955 ifp->if_flags &= ~IFF_OACTIVE; 956 GO_WINDOW(1); 957 inw(BASE + EP_W1_FREE_TX); 958 epstart(ifp); 959 } 960 if (status & S_CARD_FAILURE) { 961 ifp->if_timer = 0; 962#ifdef EP_LOCAL_STATS 963 printf("\nep%d:\n\tStatus: %x\n", sc->unit, status); 964 GO_WINDOW(4); 965 printf("\tFIFO Diagnostic: %x\n", inw(BASE + EP_W4_FIFO_DIAG)); 966 printf("\tStat: %x\n", sc->stat); 967 printf("\tIpackets=%d, Opackets=%d\n", 968 ifp->if_ipackets, ifp->if_opackets); 969 printf("\tNOF=%d, NOMB=%d, BPFD=%d, RXOF=%d, RXOL=%d, TXU=%d\n", 970 sc->rx_no_first, sc->rx_no_mbuf, sc->rx_bpf_disc, sc->rx_overrunf, 971 sc->rx_overrunl, sc->tx_underrun); 972#else 973 974#ifdef DIAGNOSTIC 975 printf("ep%d: Status: %x (input buffer overflow)\n", sc->unit, status); 976#else 977 ++ifp->if_ierrors; 978#endif 979 980#endif 981 epinit(sc); 982 splx(x); 983 return; 984 } 985 if (status & S_TX_COMPLETE) { 986 ifp->if_timer = 0; 987 /* we need ACK. we do it at the end */ 988 /* 989 * We need to read TX_STATUS until we get a 0 status in order to 990 * turn off the interrupt flag. 991 */ 992 while ((status = inb(BASE + EP_W1_TX_STATUS)) & TXS_COMPLETE) { 993 if (status & TXS_SUCCES_INTR_REQ); 994 else if (status & (TXS_UNDERRUN | TXS_JABBER | TXS_MAX_COLLISION)) { 995 outw(BASE + EP_COMMAND, TX_RESET); 996 if (status & TXS_UNDERRUN) { 997#ifdef EP_LOCAL_STATS 998 sc->tx_underrun++; 999#endif 1000 } else { 1001 if (status & TXS_JABBER); 1002 else /* TXS_MAX_COLLISION - we shouldn't get here */ 1003 ++ifp->if_collisions; 1004 } 1005 ++ifp->if_oerrors; 1006 outw(BASE + EP_COMMAND, TX_ENABLE); 1007 /* 1008 * To have a tx_avail_int but giving the chance to the 1009 * Reception 1010 */ 1011 if (ifp->if_snd.ifq_head) { 1012 outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | 8); 1013 } 1014 } 1015 outb(BASE + EP_W1_TX_STATUS, 0x0); /* pops up the next 1016 * status */ 1017 } /* while */ 1018 ifp->if_flags &= ~IFF_OACTIVE; 1019 GO_WINDOW(1); 1020 inw(BASE + EP_W1_FREE_TX); 1021 epstart(ifp); 1022 } /* end TX_COMPLETE */ 1023 } 1024 1025 outw(BASE + EP_COMMAND, C_INTR_LATCH); /* ACK int Latch */ 1026 1027 if ((status = inw(BASE + EP_STATUS)) & S_5_INTS) 1028 goto rescan; 1029 1030 /* re-enable Ints */ 1031 outw(BASE + EP_COMMAND, SET_INTR_MASK | S_5_INTS); 1032 1033 splx(x); 1034} 1035 1036static void 1037epread(sc) 1038 register struct ep_softc *sc; 1039{ 1040 struct ether_header *eh; 1041 struct mbuf *top, *mcur, *m; 1042 struct ifnet *ifp; 1043 int lenthisone; 1044 1045 short rx_fifo2, status; 1046 register short rx_fifo; 1047 1048 ifp = &sc->arpcom.ac_if; 1049 status = inw(BASE + EP_W1_RX_STATUS); 1050 1051read_again: 1052 1053 if (status & ERR_RX) { 1054 ++ifp->if_ierrors; 1055 if (status & ERR_RX_OVERRUN) { 1056 /* 1057 * we can think the rx latency is actually greather than we 1058 * expect 1059 */ 1060#ifdef EP_LOCAL_STATS 1061 if (ep_ftst(F_RX_FIRST)) 1062 sc->rx_overrunf++; 1063 else 1064 sc->rx_overrunl++; 1065#endif 1066 } 1067 goto out; 1068 } 1069 rx_fifo = rx_fifo2 = status & RX_BYTES_MASK; 1070 1071 if (ep_ftst(F_RX_FIRST)) { 1072 MGETHDR(m, M_DONTWAIT, MT_DATA); 1073 if (!m) 1074 goto out; 1075 if (rx_fifo >= MINCLSIZE) 1076 MCLGET(m, M_DONTWAIT); 1077 sc->top = sc->mcur = top = m; 1078#define EROUND ((sizeof(struct ether_header) + 3) & ~3) 1079#define EOFF (EROUND - sizeof(struct ether_header)) 1080 top->m_data += EOFF; 1081 1082 /* Read what should be the header. */ 1083 insw(BASE + EP_W1_RX_PIO_RD_1, 1084 mtod(top, caddr_t), sizeof(struct ether_header) / 2); 1085 top->m_len = sizeof(struct ether_header); 1086 rx_fifo -= sizeof(struct ether_header); 1087 sc->cur_len = rx_fifo2; 1088 } else { 1089 /* come here if we didn't have a complete packet last time */ 1090 top = sc->top; 1091 m = sc->mcur; 1092 sc->cur_len += rx_fifo2; 1093 } 1094 1095 /* Reads what is left in the RX FIFO */ 1096 while (rx_fifo > 0) { 1097 lenthisone = min(rx_fifo, M_TRAILINGSPACE(m)); 1098 if (lenthisone == 0) { /* no room in this one */ 1099 mcur = m; 1100 MGET(m, M_DONTWAIT, MT_DATA); 1101 if (!m) 1102 goto out; 1103 if (rx_fifo >= MINCLSIZE) 1104 MCLGET(m, M_DONTWAIT); 1105 m->m_len = 0; 1106 mcur->m_next = m; 1107 lenthisone = min(rx_fifo, M_TRAILINGSPACE(m)); 1108 } 1109 if (ep_ftst(F_ACCESS_32_BITS)) { /* default for EISA configured cards*/ 1110 insl(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len, 1111 lenthisone / 4); 1112 m->m_len += (lenthisone & ~3); 1113 if (lenthisone & 3) 1114 insb(BASE + EP_W1_RX_PIO_RD_1, 1115 mtod(m, caddr_t) + m->m_len, 1116 lenthisone & 3); 1117 m->m_len += (lenthisone & 3); 1118 } else { 1119 insw(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len, 1120 lenthisone / 2); 1121 m->m_len += lenthisone; 1122 if (lenthisone & 1) 1123 *(mtod(m, caddr_t) + m->m_len - 1) = inb(BASE + EP_W1_RX_PIO_RD_1); 1124 } 1125 rx_fifo -= lenthisone; 1126 } 1127 1128 if (status & ERR_RX_INCOMPLETE) { /* we haven't received the complete 1129 * packet */ 1130 sc->mcur = m; 1131#ifdef EP_LOCAL_STATS 1132 sc->rx_no_first++; /* to know how often we come here */ 1133#endif 1134 ep_frst(F_RX_FIRST); 1135 if (!((status = inw(BASE + EP_W1_RX_STATUS)) & ERR_RX_INCOMPLETE)) { 1136 /* we see if by now, the packet has completly arrived */ 1137 goto read_again; 1138 } 1139 outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | RX_NEXT_EARLY_THRESH); 1140 return; 1141 } 1142 outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK); 1143 ++ifp->if_ipackets; 1144 ep_fset(F_RX_FIRST); 1145 top->m_pkthdr.rcvif = &sc->arpcom.ac_if; 1146 top->m_pkthdr.len = sc->cur_len; 1147 1148#if NBPFILTER > 0 1149 if (ifp->if_bpf) { 1150 bpf_mtap(ifp, top); 1151 1152 /* 1153 * Note that the interface cannot be in promiscuous mode if there are 1154 * no BPF listeners. And if we are in promiscuous mode, we have to 1155 * check if this packet is really ours. 1156 */ 1157 eh = mtod(top, struct ether_header *); 1158 if ((ifp->if_flags & IFF_PROMISC) && 1159 (eh->ether_dhost[0] & 1) == 0 && 1160 bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr, 1161 sizeof(eh->ether_dhost)) != 0 && 1162 bcmp(eh->ether_dhost, etherbroadcastaddr, 1163 sizeof(eh->ether_dhost)) != 0) { 1164 if (sc->top) { 1165 m_freem(sc->top); 1166 sc->top = 0; 1167 } 1168 ep_fset(F_RX_FIRST); 1169#ifdef EP_LOCAL_STATS 1170 sc->rx_bpf_disc++; 1171#endif 1172 while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); 1173 outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH); 1174 return; 1175 } 1176 } 1177#endif 1178 1179 eh = mtod(top, struct ether_header *); 1180 m_adj(top, sizeof(struct ether_header)); 1181 ether_input(ifp, eh, top); 1182 sc->top = 0; 1183 while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); 1184 outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH); 1185 return; 1186 1187out: 1188 outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK); 1189 if (sc->top) { 1190 m_freem(sc->top); 1191 sc->top = 0; 1192#ifdef EP_LOCAL_STATS 1193 sc->rx_no_mbuf++; 1194#endif 1195 } 1196 ep_fset(F_RX_FIRST); 1197 while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); 1198 outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH); 1199} 1200 1201/* 1202 * Look familiar? 1203 */ 1204static int 1205epioctl(ifp, cmd, data) 1206 register struct ifnet *ifp; 1207 int cmd; 1208 caddr_t data; 1209{ 1210 register struct ifaddr *ifa = (struct ifaddr *) data; 1211 struct ep_softc *sc = ifp->if_softc; 1212 struct ifreq *ifr = (struct ifreq *) data; 1213 int s, error = 0; 1214 1215 s = splimp(); 1216 1217 switch (cmd) { 1218 case SIOCSIFADDR: 1219 ifp->if_flags |= IFF_UP; 1220 1221 /* netifs are BUSY when UP */ 1222 1223 switch (ifa->ifa_addr->sa_family) { 1224#ifdef INET 1225 case AF_INET: 1226 epinit(sc); /* before arpwhohas */ 1227 arp_ifinit((struct arpcom *)ifp, ifa); 1228 break; 1229#endif 1230#ifdef IPX 1231 case AF_IPX: 1232 { 1233 register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 1234 1235 if (ipx_nullhost(*ina)) 1236 ina->x_host = 1237 *(union ipx_host *) (sc->arpcom.ac_enaddr); 1238 else { 1239 ifp->if_flags &= ~IFF_RUNNING; 1240 bcopy((caddr_t) ina->x_host.c_host, 1241 (caddr_t) sc->arpcom.ac_enaddr, 1242 sizeof(sc->arpcom.ac_enaddr)); 1243 } 1244 epinit(sc); 1245 break; 1246 } 1247#endif 1248#ifdef NS 1249 case AF_NS: 1250 { 1251 register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); 1252 1253 if (ns_nullhost(*ina)) 1254 ina->x_host = 1255 *(union ns_host *) (sc->arpcom.ac_enaddr); 1256 else { 1257 ifp->if_flags &= ~IFF_RUNNING; 1258 bcopy((caddr_t) ina->x_host.c_host, 1259 (caddr_t) sc->arpcom.ac_enaddr, 1260 sizeof(sc->arpcom.ac_enaddr)); 1261 } 1262 epinit(sc); 1263 break; 1264 } 1265#endif 1266 default: 1267 epinit(sc); 1268 break; 1269 } 1270 break; 1271 case SIOCGIFADDR: 1272 { 1273 struct sockaddr *sa; 1274 1275 sa = (struct sockaddr *) & ifr->ifr_data; 1276 bcopy((caddr_t) sc->arpcom.ac_enaddr, 1277 (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 1278 } 1279 break; 1280 case SIOCSIFFLAGS: 1281 1282 if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) { 1283 ifp->if_flags &= ~IFF_RUNNING; 1284 epstop(sc); 1285 break; 1286 } else { 1287 /* reinitialize card on any parameter change */ 1288 epinit(sc); 1289 break; 1290 } 1291 1292 /* NOTREACHED */ 1293 break; 1294#ifdef notdef 1295 case SIOCGHWADDR: 1296 bcopy((caddr_t) sc->sc_addr, (caddr_t) & ifr->ifr_data, 1297 sizeof(sc->sc_addr)); 1298 break; 1299#endif 1300 case SIOCSIFMTU: 1301 1302 /* 1303 * Set the interface MTU. 1304 */ 1305 if (ifr->ifr_mtu > ETHERMTU) { 1306 error = EINVAL; 1307 } else { 1308 ifp->if_mtu = ifr->ifr_mtu; 1309 } 1310 break; 1311 case SIOCADDMULTI: 1312 case SIOCDELMULTI: 1313 /* 1314 * The Etherlink III has no programmable multicast 1315 * filter. We always initialize the card to be 1316 * promiscuous to multicast, since we're always a 1317 * member of the ALL-SYSTEMS group, so there's no 1318 * need to process SIOC*MULTI requests. 1319 */ 1320 error = 0; 1321 break; 1322 default: 1323 error = EINVAL; 1324 } 1325 1326 splx(s); 1327 1328 return (error); 1329} 1330 1331static void 1332epwatchdog(ifp) 1333 struct ifnet *ifp; 1334{ 1335 struct ep_softc *sc = ifp->if_softc; 1336 1337 /* 1338 printf("ep: watchdog\n"); 1339 1340 log(LOG_ERR, "ep%d: watchdog\n", ifp->if_unit); 1341 ifp->if_oerrors++; 1342 */ 1343 1344 if (sc->gone) { 1345 return; 1346 } 1347 1348 ifp->if_flags &= ~IFF_OACTIVE; 1349 epstart(ifp); 1350 ep_intr(ifp->if_softc); 1351} 1352 1353static void 1354epstop(sc) 1355 struct ep_softc *sc; 1356{ 1357 if (sc->gone) { 1358 return; 1359 } 1360 1361 outw(BASE + EP_COMMAND, RX_DISABLE); 1362 outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK); 1363 while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); 1364 outw(BASE + EP_COMMAND, TX_DISABLE); 1365 outw(BASE + EP_COMMAND, STOP_TRANSCEIVER); 1366 outw(BASE + EP_COMMAND, RX_RESET); 1367 outw(BASE + EP_COMMAND, TX_RESET); 1368 while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); 1369 outw(BASE + EP_COMMAND, C_INTR_LATCH); 1370 outw(BASE + EP_COMMAND, SET_RD_0_MASK); 1371 outw(BASE + EP_COMMAND, SET_INTR_MASK); 1372 outw(BASE + EP_COMMAND, SET_RX_FILTER); 1373} 1374 1375 1376#if 0 1377static int 1378send_ID_sequence(port) 1379 int port; 1380{ 1381 int cx, al; 1382 1383 for (al = 0xff, cx = 0; cx < 255; cx++) { 1384 outb(port, al); 1385 al <<= 1; 1386 if (al & 0x100) 1387 al ^= 0xcf; 1388 } 1389 return (1); 1390} 1391#endif 1392 1393 1394/* 1395 * We get eeprom data from the id_port given an offset into the eeprom. 1396 * Basically; after the ID_sequence is sent to all of the cards; they enter 1397 * the ID_CMD state where they will accept command requests. 0x80-0xbf loads 1398 * the eeprom data. We then read the port 16 times and with every read; the 1399 * cards check for contention (ie: if one card writes a 0 bit and another 1400 * writes a 1 bit then the host sees a 0. At the end of the cycle; each card 1401 * compares the data on the bus; if there is a difference then that card goes 1402 * into ID_WAIT state again). In the meantime; one bit of data is returned in 1403 * the AX register which is conveniently returned to us by inb(). Hence; we 1404 * read 16 times getting one bit of data with each read. 1405 */ 1406static int 1407get_eeprom_data(id_port, offset) 1408 int id_port; 1409 int offset; 1410{ 1411 int i, data = 0; 1412 outb(id_port, 0x80 + offset); 1413 DELAY(1000); 1414 for (i = 0; i < 16; i++) 1415 data = (data << 1) | (inw(id_port) & 1); 1416 return (data); 1417} 1418 1419#endif /* NEP > 0 */ 1420