if_plip.c revision 40993
1/*- 2 * Copyright (c) 1997 Poul-Henning Kamp 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * From Id: lpt.c,v 1.55.2.1 1996/11/12 09:08:38 phk Exp 27 * $Id: if_plip.c,v 1.5 1998/10/24 18:55:53 msmith Exp $ 28 */ 29 30/* 31 * Parallel port TCP/IP interfaces added. I looked at the driver from 32 * MACH but this is a complete rewrite, and btw. incompatible, and it 33 * should perform better too. I have never run the MACH driver though. 34 * 35 * This driver sends two bytes (0x08, 0x00) in front of each packet, 36 * to allow us to distinguish another format later. 37 * 38 * Now added an Linux/Crynwr compatibility mode which is enabled using 39 * IF_LINK0 - Tim Wilkinson. 40 * 41 * TODO: 42 * Make HDLC/PPP mode, use IF_LLC1 to enable. 43 * 44 * Connect the two computers using a Laplink parallel cable to use this 45 * feature: 46 * 47 * +----------------------------------------+ 48 * |A-name A-End B-End Descr. Port/Bit | 49 * +----------------------------------------+ 50 * |DATA0 2 15 Data 0/0x01 | 51 * |-ERROR 15 2 1/0x08 | 52 * +----------------------------------------+ 53 * |DATA1 3 13 Data 0/0x02 | 54 * |+SLCT 13 3 1/0x10 | 55 * +----------------------------------------+ 56 * |DATA2 4 12 Data 0/0x04 | 57 * |+PE 12 4 1/0x20 | 58 * +----------------------------------------+ 59 * |DATA3 5 10 Strobe 0/0x08 | 60 * |-ACK 10 5 1/0x40 | 61 * +----------------------------------------+ 62 * |DATA4 6 11 Data 0/0x10 | 63 * |BUSY 11 6 1/~0x80 | 64 * +----------------------------------------+ 65 * |GND 18-25 18-25 GND - | 66 * +----------------------------------------+ 67 * 68 * Expect transfer-rates up to 75 kbyte/sec. 69 * 70 * If GCC could correctly grok 71 * register int port asm("edx") 72 * the code would be cleaner 73 * 74 * Poul-Henning Kamp <phk@freebsd.org> 75 */ 76 77/* 78 * Update for ppbus, PLIP support only - Nicolas Souchu 79 */ 80 81#include <sys/param.h> 82#include <sys/systm.h> 83#include <sys/mbuf.h> 84#include <sys/socket.h> 85#include <sys/sockio.h> 86#include <sys/kernel.h> 87#include <sys/malloc.h> 88 89#include <net/if.h> 90#include <net/if_types.h> 91#include <net/netisr.h> 92 93#include <netinet/in.h> 94#include <netinet/in_var.h> 95 96#include "bpfilter.h" 97#if NBPFILTER > 0 98#include <net/bpf.h> 99#endif 100 101#include <dev/ppbus/ppbconf.h> 102#include <dev/ppbus/nlpt.h> 103 104#ifndef LPMTU /* MTU for the lp# interfaces */ 105#define LPMTU 1500 106#endif 107 108#ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 109#define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 110#endif 111 112#ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 113#define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 114#endif 115 116#ifndef LPMAXERRS /* Max errors before !RUNNING */ 117#define LPMAXERRS 100 118#endif 119 120#define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 121#define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 122#define MLPIPHDRLEN CLPIPHDRLEN 123 124#define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 125#define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 126#if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 127#define MLPIPHDRLEN LPIPHDRLEN 128#endif 129 130#define LPIPTBLSIZE 256 /* Size of octet translation table */ 131 132#ifndef DEBUG 133#define DEBUG 134#endif 135 136#ifndef DEBUG 137#define lprintf (void) 138#else 139#define lprintf if (lptflag) printf 140static int volatile lptflag = 1; 141#endif 142 143struct lpt_softc { 144 unsigned short lp_unit; 145 146 struct ppb_device lp_dev; 147 148 struct ifnet sc_if; 149 u_char *sc_ifbuf; 150 int sc_iferrs; 151}; 152 153static int nlp = 0; 154#define MAXPLIP 8 /* XXX not much better! */ 155static struct lpt_softc *lpdata[MAXPLIP]; 156 157 158/* Tables for the lp# interface */ 159static u_char *txmith; 160#define txmitl (txmith+(1*LPIPTBLSIZE)) 161#define trecvh (txmith+(2*LPIPTBLSIZE)) 162#define trecvl (txmith+(3*LPIPTBLSIZE)) 163 164static u_char *ctxmith; 165#define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 166#define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 167#define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 168 169/* Functions for the lp# interface */ 170static struct ppb_device *lpprobe(struct ppb_data *); 171static int lpattach(struct ppb_device *); 172 173static int lpinittables(void); 174static int lpioctl(struct ifnet *, u_long, caddr_t); 175static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 176 struct rtentry *); 177static void lpintr(int); 178 179/* 180 * Make ourselves visible as a ppbus driver 181 */ 182 183static struct ppb_driver lpdriver = { 184 lpprobe, lpattach, "lp" 185}; 186DATA_SET(ppbdriver_set, lpdriver); 187 188 189/* 190 * lpprobe() 191 */ 192static struct ppb_device * 193lpprobe(struct ppb_data *ppb) 194{ 195 struct lpt_softc *lp; 196 197 /* if we haven't interrupts, the probe fails */ 198 if (!ppb->ppb_link->id_irq) 199 return (0); 200 201 lp = (struct lpt_softc *) malloc(sizeof(struct lpt_softc), 202 M_TEMP, M_NOWAIT); 203 if (!lp) { 204 printf("lp: cannot malloc!\n"); 205 return (0); 206 } 207 bzero(lp, sizeof(struct lpt_softc)); 208 209 lpdata[nlp] = lp; 210 211 /* 212 * lp dependent initialisation. 213 */ 214 lp->lp_unit = nlp; 215 216 if (bootverbose) 217 printf("plip: irq %d\n", ppb->ppb_link->id_irq); 218 219 /* 220 * ppbus dependent initialisation. 221 */ 222 lp->lp_dev.id_unit = lp->lp_unit; 223 lp->lp_dev.name = lpdriver.name; 224 lp->lp_dev.ppb = ppb; 225 lp->lp_dev.intr = lpintr; 226 227 /* Ok, go to next device on next probe */ 228 nlp ++; 229 230 return (&lp->lp_dev); 231} 232 233static int 234lpattach (struct ppb_device *dev) 235{ 236 int unit = dev->id_unit; 237 struct lpt_softc *sc = lpdata[unit]; 238 struct ifnet *ifp = &sc->sc_if; 239 240 /* 241 * Report ourselves 242 */ 243 printf("plip%d: <PLIP network interface> on ppbus %d\n", 244 dev->id_unit, dev->ppb->ppb_link->adapter_unit); 245 246 ifp->if_softc = sc; 247 ifp->if_name = "lp"; 248 ifp->if_unit = unit; 249 ifp->if_mtu = LPMTU; 250 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 251 ifp->if_ioctl = lpioctl; 252 ifp->if_output = lpoutput; 253 ifp->if_type = IFT_PARA; 254 ifp->if_hdrlen = 0; 255 ifp->if_addrlen = 0; 256 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 257 if_attach(ifp); 258 259#if NBPFILTER > 0 260 bpfattach(ifp, DLT_NULL, LPIPHDRLEN); 261#endif 262 263 return (1); 264} 265/* 266 * Build the translation tables for the LPIP (BSD unix) protocol. 267 * We don't want to calculate these nasties in our tight loop, so we 268 * precalculate them when we initialize. 269 */ 270static int 271lpinittables (void) 272{ 273 int i; 274 275 if (!txmith) 276 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 277 278 if (!txmith) 279 return 1; 280 281 if (!ctxmith) 282 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 283 284 if (!ctxmith) 285 return 1; 286 287 for (i=0; i < LPIPTBLSIZE; i++) { 288 ctxmith[i] = (i & 0xF0) >> 4; 289 ctxmitl[i] = 0x10 | (i & 0x0F); 290 ctrecvh[i] = (i & 0x78) << 1; 291 ctrecvl[i] = (i & 0x78) >> 3; 292 } 293 294 for (i=0; i < LPIPTBLSIZE; i++) { 295 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 296 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 297 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 298 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 299 } 300 301 return 0; 302} 303 304/* 305 * Process an ioctl request. 306 */ 307 308static int 309lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 310{ 311 struct lpt_softc *sc = lpdata[ifp->if_unit]; 312 struct ifaddr *ifa = (struct ifaddr *)data; 313 struct ifreq *ifr = (struct ifreq *)data; 314 u_char *ptr; 315 int error; 316 317 switch (cmd) { 318 319 case SIOCSIFDSTADDR: 320 case SIOCAIFADDR: 321 case SIOCSIFADDR: 322 if (ifa->ifa_addr->sa_family != AF_INET) 323 return EAFNOSUPPORT; 324 325 ifp->if_flags |= IFF_UP; 326 /* FALLTHROUGH */ 327 case SIOCSIFFLAGS: 328 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 329 330 ppb_wctr(&sc->lp_dev, 0x00); 331 ifp->if_flags &= ~IFF_RUNNING; 332 333 /* IFF_UP is not set, try to release the bus anyway */ 334 ppb_release_bus(&sc->lp_dev); 335 break; 336 } 337 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 338 339 /* 340 * Try to allocate the ppbus as soon as possible 341 * With ppbus allocation, interrupts are enabled 342 * Now IFF_UP means that we own the bus 343 * 344 * XXX 345 * Should the request be interruptible? 346 */ 347 if ((error = ppb_request_bus(&sc->lp_dev, PPB_WAIT|PPB_INTR))) 348 return (error); 349 350 if (lpinittables()) { 351 ppb_release_bus(&sc->lp_dev); 352 return ENOBUFS; 353 } 354 355 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 356 M_DEVBUF, M_WAITOK); 357 if (!sc->sc_ifbuf) { 358 ppb_release_bus(&sc->lp_dev); 359 return ENOBUFS; 360 } 361 362 ppb_wctr(&sc->lp_dev, LPC_ENA); 363 ifp->if_flags |= IFF_RUNNING; 364 } 365 break; 366 367 case SIOCSIFMTU: 368 ptr = sc->sc_ifbuf; 369 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 370 if (!sc->sc_ifbuf) { 371 sc->sc_ifbuf = ptr; 372 return ENOBUFS; 373 } 374 if (ptr) 375 free(ptr,M_DEVBUF); 376 sc->sc_if.if_mtu = ifr->ifr_mtu; 377 break; 378 379 case SIOCGIFMTU: 380 ifr->ifr_mtu = sc->sc_if.if_mtu; 381 break; 382 383 case SIOCADDMULTI: 384 case SIOCDELMULTI: 385 if (ifr == 0) { 386 return EAFNOSUPPORT; /* XXX */ 387 } 388 switch (ifr->ifr_addr.sa_family) { 389 390 case AF_INET: 391 break; 392 393 default: 394 return EAFNOSUPPORT; 395 } 396 break; 397 398 case SIOCGIFMEDIA: 399 /* 400 * No ifmedia support at this stage; maybe use it 401 * in future for eg. protocol selection. 402 */ 403 return EINVAL; 404 405 default: 406 lprintf("LP:ioctl(0x%lx)\n", cmd); 407 return EINVAL; 408 } 409 return 0; 410} 411 412static __inline int 413clpoutbyte (u_char byte, int spin, struct ppb_device *dev) 414{ 415 ppb_wdtr(dev, ctxmitl[byte]); 416 while (ppb_rstr(dev) & CLPIP_SHAKE) 417 if (--spin == 0) { 418 return 1; 419 } 420 ppb_wdtr(dev, ctxmith[byte]); 421 while (!(ppb_rstr(dev) & CLPIP_SHAKE)) 422 if (--spin == 0) { 423 return 1; 424 } 425 return 0; 426} 427 428static __inline int 429clpinbyte (int spin, struct ppb_device *dev) 430{ 431 int c, cl; 432 433 while((ppb_rstr(dev) & CLPIP_SHAKE)) 434 if(!--spin) { 435 return -1; 436 } 437 cl = ppb_rstr(dev); 438 ppb_wdtr(dev, 0x10); 439 440 while(!(ppb_rstr(dev) & CLPIP_SHAKE)) 441 if(!--spin) { 442 return -1; 443 } 444 c = ppb_rstr(dev); 445 ppb_wdtr(dev, 0x00); 446 447 return (ctrecvl[cl] | ctrecvh[c]); 448} 449 450static void 451lpintr (int unit) 452{ 453 struct lpt_softc *sc = lpdata[unit]; 454 int len, s, j; 455 u_char *bp; 456 u_char c, cl; 457 struct mbuf *top; 458 459 s = splhigh(); 460 461 if (sc->sc_if.if_flags & IFF_LINK0) { 462 463 /* Ack. the request */ 464 ppb_wdtr(&sc->lp_dev, 0x01); 465 466 /* Get the packet length */ 467 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 468 if (j == -1) 469 goto err; 470 len = j; 471 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 472 if (j == -1) 473 goto err; 474 len = len + (j << 8); 475 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 476 goto err; 477 478 bp = sc->sc_ifbuf; 479 480 while (len--) { 481 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 482 if (j == -1) { 483 goto err; 484 } 485 *bp++ = j; 486 } 487 /* Get and ignore checksum */ 488 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 489 if (j == -1) { 490 goto err; 491 } 492 493 len = bp - sc->sc_ifbuf; 494 if (len <= CLPIPHDRLEN) 495 goto err; 496 497 sc->sc_iferrs = 0; 498 499 if (IF_QFULL(&ipintrq)) { 500 lprintf("DROP"); 501 IF_DROP(&ipintrq); 502 goto done; 503 } 504 len -= CLPIPHDRLEN; 505 sc->sc_if.if_ipackets++; 506 sc->sc_if.if_ibytes += len; 507 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 508 if (top) { 509 IF_ENQUEUE(&ipintrq, top); 510 schednetisr(NETISR_IP); 511 } 512 goto done; 513 } 514 while ((ppb_rstr(&sc->lp_dev) & LPIP_SHAKE)) { 515 len = sc->sc_if.if_mtu + LPIPHDRLEN; 516 bp = sc->sc_ifbuf; 517 while (len--) { 518 519 cl = ppb_rstr(&sc->lp_dev); 520 ppb_wdtr(&sc->lp_dev, 8); 521 522 j = LPMAXSPIN2; 523 while((ppb_rstr(&sc->lp_dev) & LPIP_SHAKE)) 524 if(!--j) goto err; 525 526 c = ppb_rstr(&sc->lp_dev); 527 ppb_wdtr(&sc->lp_dev, 0); 528 529 *bp++= trecvh[cl] | trecvl[c]; 530 531 j = LPMAXSPIN2; 532 while (!((cl=ppb_rstr(&sc->lp_dev)) & LPIP_SHAKE)) { 533 if (cl != c && 534 (((cl = ppb_rstr(&sc->lp_dev)) ^ 0xb8) & 0xf8) == 535 (c & 0xf8)) 536 goto end; 537 if (!--j) goto err; 538 } 539 } 540 541 end: 542 len = bp - sc->sc_ifbuf; 543 if (len <= LPIPHDRLEN) 544 goto err; 545 546 sc->sc_iferrs = 0; 547 548 if (IF_QFULL(&ipintrq)) { 549 lprintf("DROP"); 550 IF_DROP(&ipintrq); 551 goto done; 552 } 553#if NBPFILTER > 0 554 if (sc->sc_if.if_bpf) { 555 bpf_tap(&sc->sc_if, sc->sc_ifbuf, len); 556 } 557#endif 558 len -= LPIPHDRLEN; 559 sc->sc_if.if_ipackets++; 560 sc->sc_if.if_ibytes += len; 561 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 562 if (top) { 563 IF_ENQUEUE(&ipintrq, top); 564 schednetisr(NETISR_IP); 565 } 566 } 567 goto done; 568 569 err: 570 ppb_wdtr(&sc->lp_dev, 0); 571 lprintf("R"); 572 sc->sc_if.if_ierrors++; 573 sc->sc_iferrs++; 574 575 /* 576 * We are not able to send receive anything for now, 577 * so stop wasting our time 578 */ 579 if (sc->sc_iferrs > LPMAXERRS) { 580 printf("lp%d: Too many errors, Going off-line.\n", unit); 581 ppb_wctr(&sc->lp_dev, 0x00); 582 sc->sc_if.if_flags &= ~IFF_RUNNING; 583 sc->sc_iferrs=0; 584 } 585 586 done: 587 splx(s); 588 return; 589} 590 591static __inline int 592lpoutbyte (u_char byte, int spin, struct ppb_device *dev) 593{ 594 ppb_wdtr(dev, txmith[byte]); 595 while (!(ppb_rstr(dev) & LPIP_SHAKE)) 596 if (--spin == 0) 597 return 1; 598 ppb_wdtr(dev, txmitl[byte]); 599 while (ppb_rstr(dev) & LPIP_SHAKE) 600 if (--spin == 0) 601 return 1; 602 return 0; 603} 604 605static int 606lpoutput (struct ifnet *ifp, struct mbuf *m, 607 struct sockaddr *dst, struct rtentry *rt) 608{ 609 struct lpt_softc *sc = lpdata[ifp->if_unit]; 610 int s, err; 611 struct mbuf *mm; 612 u_char *cp = "\0\0"; 613 u_char chksum = 0; 614 int count = 0; 615 int i; 616 int spin; 617 618 /* We need a sensible value if we abort */ 619 cp++; 620 ifp->if_flags |= IFF_RUNNING; 621 622 err = 1; /* assume we're aborting because of an error */ 623 624 s = splhigh(); 625 626 /* Suspend (on laptops) or receive-errors might have taken us offline */ 627 ppb_wctr(&sc->lp_dev, LPC_ENA); 628 629 if (ifp->if_flags & IFF_LINK0) { 630 631 if (!(ppb_rstr(&sc->lp_dev) & CLPIP_SHAKE)) { 632 lprintf("&"); 633 lpintr(ifp->if_unit); 634 } 635 636 /* Alert other end to pending packet */ 637 spin = LPMAXSPIN1; 638 ppb_wdtr(&sc->lp_dev, 0x08); 639 while ((ppb_rstr(&sc->lp_dev) & 0x08) == 0) 640 if (--spin == 0) { 641 goto nend; 642 } 643 644 /* Calculate length of packet, then send that */ 645 646 count += 14; /* Ethernet header len */ 647 648 mm = m; 649 for (mm = m; mm; mm = mm->m_next) { 650 count += mm->m_len; 651 } 652 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, &sc->lp_dev)) 653 goto nend; 654 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, &sc->lp_dev)) 655 goto nend; 656 657 /* Send dummy ethernet header */ 658 for (i = 0; i < 12; i++) { 659 if (clpoutbyte(i, LPMAXSPIN1, &sc->lp_dev)) 660 goto nend; 661 chksum += i; 662 } 663 664 if (clpoutbyte(0x08, LPMAXSPIN1, &sc->lp_dev)) 665 goto nend; 666 if (clpoutbyte(0x00, LPMAXSPIN1, &sc->lp_dev)) 667 goto nend; 668 chksum += 0x08 + 0x00; /* Add into checksum */ 669 670 mm = m; 671 do { 672 cp = mtod(mm, u_char *); 673 while (mm->m_len--) { 674 chksum += *cp; 675 if (clpoutbyte(*cp++, LPMAXSPIN2, &sc->lp_dev)) 676 goto nend; 677 } 678 } while ((mm = mm->m_next)); 679 680 /* Send checksum */ 681 if (clpoutbyte(chksum, LPMAXSPIN2, &sc->lp_dev)) 682 goto nend; 683 684 /* Go quiescent */ 685 ppb_wdtr(&sc->lp_dev, 0); 686 687 err = 0; /* No errors */ 688 689 nend: 690 if (err) { /* if we didn't timeout... */ 691 ifp->if_oerrors++; 692 lprintf("X"); 693 } else { 694 ifp->if_opackets++; 695 ifp->if_obytes += m->m_pkthdr.len; 696 } 697 698 m_freem(m); 699 700 if (!(ppb_rstr(&sc->lp_dev) & CLPIP_SHAKE)) { 701 lprintf("^"); 702 lpintr(ifp->if_unit); 703 } 704 (void) splx(s); 705 return 0; 706 } 707 708 if (ppb_rstr(&sc->lp_dev) & LPIP_SHAKE) { 709 lprintf("&"); 710 lpintr(ifp->if_unit); 711 } 712 713 if (lpoutbyte(0x08, LPMAXSPIN1, &sc->lp_dev)) 714 goto end; 715 if (lpoutbyte(0x00, LPMAXSPIN2, &sc->lp_dev)) 716 goto end; 717 718 mm = m; 719 do { 720 cp = mtod(mm,u_char *); 721 while (mm->m_len--) 722 if (lpoutbyte(*cp++, LPMAXSPIN2, &sc->lp_dev)) 723 goto end; 724 } while ((mm = mm->m_next)); 725 726 err = 0; /* no errors were encountered */ 727 728 end: 729 --cp; 730 ppb_wdtr(&sc->lp_dev, txmitl[*cp] ^ 0x17); 731 732 if (err) { /* if we didn't timeout... */ 733 ifp->if_oerrors++; 734 lprintf("X"); 735 } else { 736 ifp->if_opackets++; 737 ifp->if_obytes += m->m_pkthdr.len; 738#if NBPFILTER > 0 739 if (ifp->if_bpf) { 740 /* 741 * We need to prepend the packet type as 742 * a two byte field. Cons up a dummy header 743 * to pacify bpf. This is safe because bpf 744 * will only read from the mbuf (i.e., it won't 745 * try to free it or keep a pointer to it). 746 */ 747 struct mbuf m0; 748 u_short hdr = 0x800; 749 750 m0.m_next = m; 751 m0.m_len = 2; 752 m0.m_data = (char *)&hdr; 753 754 bpf_mtap(ifp, &m0); 755 } 756#endif 757 } 758 759 m_freem(m); 760 761 if (ppb_rstr(&sc->lp_dev) & LPIP_SHAKE) { 762 lprintf("^"); 763 lpintr(ifp->if_unit); 764 } 765 766 (void) splx(s); 767 return 0; 768} 769