if_plip.c revision 42443
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 1.6 1998/11/07 14:35:41 nsouch 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 /* XXX 340 * Should the request be interruptible? 341 */ 342 if ((error = ppb_request_bus(&sc->lp_dev, PPB_WAIT|PPB_INTR))) 343 return (error); 344 345 /* Now IFF_UP means that we own the bus */ 346 347 ppb_set_mode(&sc->lp_dev, PPB_COMPATIBLE); 348 349 if (lpinittables()) { 350 ppb_release_bus(&sc->lp_dev); 351 return ENOBUFS; 352 } 353 354 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 355 M_DEVBUF, M_WAITOK); 356 if (!sc->sc_ifbuf) { 357 ppb_release_bus(&sc->lp_dev); 358 return ENOBUFS; 359 } 360 361 ppb_wctr(&sc->lp_dev, LPC_ENA); 362 ifp->if_flags |= IFF_RUNNING; 363 } 364 break; 365 366 case SIOCSIFMTU: 367 ptr = sc->sc_ifbuf; 368 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 369 if (!sc->sc_ifbuf) { 370 sc->sc_ifbuf = ptr; 371 return ENOBUFS; 372 } 373 if (ptr) 374 free(ptr,M_DEVBUF); 375 sc->sc_if.if_mtu = ifr->ifr_mtu; 376 break; 377 378 case SIOCGIFMTU: 379 ifr->ifr_mtu = sc->sc_if.if_mtu; 380 break; 381 382 case SIOCADDMULTI: 383 case SIOCDELMULTI: 384 if (ifr == 0) { 385 return EAFNOSUPPORT; /* XXX */ 386 } 387 switch (ifr->ifr_addr.sa_family) { 388 389 case AF_INET: 390 break; 391 392 default: 393 return EAFNOSUPPORT; 394 } 395 break; 396 397 case SIOCGIFMEDIA: 398 /* 399 * No ifmedia support at this stage; maybe use it 400 * in future for eg. protocol selection. 401 */ 402 return EINVAL; 403 404 default: 405 lprintf("LP:ioctl(0x%lx)\n", cmd); 406 return EINVAL; 407 } 408 return 0; 409} 410 411static __inline int 412clpoutbyte (u_char byte, int spin, struct ppb_device *dev) 413{ 414 ppb_wdtr(dev, ctxmitl[byte]); 415 while (ppb_rstr(dev) & CLPIP_SHAKE) 416 if (--spin == 0) { 417 return 1; 418 } 419 ppb_wdtr(dev, ctxmith[byte]); 420 while (!(ppb_rstr(dev) & CLPIP_SHAKE)) 421 if (--spin == 0) { 422 return 1; 423 } 424 return 0; 425} 426 427static __inline int 428clpinbyte (int spin, struct ppb_device *dev) 429{ 430 u_char c, cl; 431 432 while((ppb_rstr(dev) & CLPIP_SHAKE)) 433 if(!--spin) { 434 return -1; 435 } 436 cl = ppb_rstr(dev); 437 ppb_wdtr(dev, 0x10); 438 439 while(!(ppb_rstr(dev) & CLPIP_SHAKE)) 440 if(!--spin) { 441 return -1; 442 } 443 c = ppb_rstr(dev); 444 ppb_wdtr(dev, 0x00); 445 446 return (ctrecvl[cl] | ctrecvh[c]); 447} 448 449static void 450lpintr (int unit) 451{ 452 struct lpt_softc *sc = lpdata[unit]; 453 int len, s, j; 454 u_char *bp; 455 u_char c, cl; 456 struct mbuf *top; 457 458 s = splhigh(); 459 460 if (sc->sc_if.if_flags & IFF_LINK0) { 461 462 /* Ack. the request */ 463 ppb_wdtr(&sc->lp_dev, 0x01); 464 465 /* Get the packet length */ 466 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 467 if (j == -1) 468 goto err; 469 len = j; 470 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 471 if (j == -1) 472 goto err; 473 len = len + (j << 8); 474 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 475 goto err; 476 477 bp = sc->sc_ifbuf; 478 479 while (len--) { 480 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 481 if (j == -1) { 482 goto err; 483 } 484 *bp++ = j; 485 } 486 /* Get and ignore checksum */ 487 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 488 if (j == -1) { 489 goto err; 490 } 491 492 len = bp - sc->sc_ifbuf; 493 if (len <= CLPIPHDRLEN) 494 goto err; 495 496 sc->sc_iferrs = 0; 497 498 if (IF_QFULL(&ipintrq)) { 499 lprintf("DROP"); 500 IF_DROP(&ipintrq); 501 goto done; 502 } 503 len -= CLPIPHDRLEN; 504 sc->sc_if.if_ipackets++; 505 sc->sc_if.if_ibytes += len; 506 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 507 if (top) { 508 IF_ENQUEUE(&ipintrq, top); 509 schednetisr(NETISR_IP); 510 } 511 goto done; 512 } 513 while ((ppb_rstr(&sc->lp_dev) & LPIP_SHAKE)) { 514 len = sc->sc_if.if_mtu + LPIPHDRLEN; 515 bp = sc->sc_ifbuf; 516 while (len--) { 517 518 cl = ppb_rstr(&sc->lp_dev); 519 ppb_wdtr(&sc->lp_dev, 8); 520 521 j = LPMAXSPIN2; 522 while((ppb_rstr(&sc->lp_dev) & LPIP_SHAKE)) 523 if(!--j) goto err; 524 525 c = ppb_rstr(&sc->lp_dev); 526 ppb_wdtr(&sc->lp_dev, 0); 527 528 *bp++= trecvh[cl] | trecvl[c]; 529 530 j = LPMAXSPIN2; 531 while (!((cl=ppb_rstr(&sc->lp_dev)) & LPIP_SHAKE)) { 532 if (cl != c && 533 (((cl = ppb_rstr(&sc->lp_dev)) ^ 0xb8) & 0xf8) == 534 (c & 0xf8)) 535 goto end; 536 if (!--j) goto err; 537 } 538 } 539 540 end: 541 len = bp - sc->sc_ifbuf; 542 if (len <= LPIPHDRLEN) 543 goto err; 544 545 sc->sc_iferrs = 0; 546 547 if (IF_QFULL(&ipintrq)) { 548 lprintf("DROP"); 549 IF_DROP(&ipintrq); 550 goto done; 551 } 552#if NBPFILTER > 0 553 if (sc->sc_if.if_bpf) { 554 bpf_tap(&sc->sc_if, sc->sc_ifbuf, len); 555 } 556#endif 557 len -= LPIPHDRLEN; 558 sc->sc_if.if_ipackets++; 559 sc->sc_if.if_ibytes += len; 560 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 561 if (top) { 562 IF_ENQUEUE(&ipintrq, top); 563 schednetisr(NETISR_IP); 564 } 565 } 566 goto done; 567 568 err: 569 ppb_wdtr(&sc->lp_dev, 0); 570 lprintf("R"); 571 sc->sc_if.if_ierrors++; 572 sc->sc_iferrs++; 573 574 /* 575 * We are not able to send receive anything for now, 576 * so stop wasting our time 577 */ 578 if (sc->sc_iferrs > LPMAXERRS) { 579 printf("lp%d: Too many errors, Going off-line.\n", unit); 580 ppb_wctr(&sc->lp_dev, 0x00); 581 sc->sc_if.if_flags &= ~IFF_RUNNING; 582 sc->sc_iferrs=0; 583 } 584 585 done: 586 splx(s); 587 return; 588} 589 590static __inline int 591lpoutbyte (u_char byte, int spin, struct ppb_device *dev) 592{ 593 ppb_wdtr(dev, txmith[byte]); 594 while (!(ppb_rstr(dev) & LPIP_SHAKE)) 595 if (--spin == 0) 596 return 1; 597 ppb_wdtr(dev, txmitl[byte]); 598 while (ppb_rstr(dev) & LPIP_SHAKE) 599 if (--spin == 0) 600 return 1; 601 return 0; 602} 603 604static int 605lpoutput (struct ifnet *ifp, struct mbuf *m, 606 struct sockaddr *dst, struct rtentry *rt) 607{ 608 struct lpt_softc *sc = lpdata[ifp->if_unit]; 609 int s, err; 610 struct mbuf *mm; 611 u_char *cp = "\0\0"; 612 u_char chksum = 0; 613 int count = 0; 614 int i; 615 int spin; 616 617 /* We need a sensible value if we abort */ 618 cp++; 619 ifp->if_flags |= IFF_RUNNING; 620 621 err = 1; /* assume we're aborting because of an error */ 622 623 s = splhigh(); 624 625 /* Suspend (on laptops) or receive-errors might have taken us offline */ 626 ppb_wctr(&sc->lp_dev, LPC_ENA); 627 628 if (ifp->if_flags & IFF_LINK0) { 629 630 if (!(ppb_rstr(&sc->lp_dev) & CLPIP_SHAKE)) { 631 lprintf("&"); 632 lpintr(ifp->if_unit); 633 } 634 635 /* Alert other end to pending packet */ 636 spin = LPMAXSPIN1; 637 ppb_wdtr(&sc->lp_dev, 0x08); 638 while ((ppb_rstr(&sc->lp_dev) & 0x08) == 0) 639 if (--spin == 0) { 640 goto nend; 641 } 642 643 /* Calculate length of packet, then send that */ 644 645 count += 14; /* Ethernet header len */ 646 647 mm = m; 648 for (mm = m; mm; mm = mm->m_next) { 649 count += mm->m_len; 650 } 651 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, &sc->lp_dev)) 652 goto nend; 653 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, &sc->lp_dev)) 654 goto nend; 655 656 /* Send dummy ethernet header */ 657 for (i = 0; i < 12; i++) { 658 if (clpoutbyte(i, LPMAXSPIN1, &sc->lp_dev)) 659 goto nend; 660 chksum += i; 661 } 662 663 if (clpoutbyte(0x08, LPMAXSPIN1, &sc->lp_dev)) 664 goto nend; 665 if (clpoutbyte(0x00, LPMAXSPIN1, &sc->lp_dev)) 666 goto nend; 667 chksum += 0x08 + 0x00; /* Add into checksum */ 668 669 mm = m; 670 do { 671 cp = mtod(mm, u_char *); 672 while (mm->m_len--) { 673 chksum += *cp; 674 if (clpoutbyte(*cp++, LPMAXSPIN2, &sc->lp_dev)) 675 goto nend; 676 } 677 } while ((mm = mm->m_next)); 678 679 /* Send checksum */ 680 if (clpoutbyte(chksum, LPMAXSPIN2, &sc->lp_dev)) 681 goto nend; 682 683 /* Go quiescent */ 684 ppb_wdtr(&sc->lp_dev, 0); 685 686 err = 0; /* No errors */ 687 688 nend: 689 if (err) { /* if we didn't timeout... */ 690 ifp->if_oerrors++; 691 lprintf("X"); 692 } else { 693 ifp->if_opackets++; 694 ifp->if_obytes += m->m_pkthdr.len; 695 } 696 697 m_freem(m); 698 699 if (!(ppb_rstr(&sc->lp_dev) & CLPIP_SHAKE)) { 700 lprintf("^"); 701 lpintr(ifp->if_unit); 702 } 703 (void) splx(s); 704 return 0; 705 } 706 707 if (ppb_rstr(&sc->lp_dev) & LPIP_SHAKE) { 708 lprintf("&"); 709 lpintr(ifp->if_unit); 710 } 711 712 if (lpoutbyte(0x08, LPMAXSPIN1, &sc->lp_dev)) 713 goto end; 714 if (lpoutbyte(0x00, LPMAXSPIN2, &sc->lp_dev)) 715 goto end; 716 717 mm = m; 718 do { 719 cp = mtod(mm,u_char *); 720 while (mm->m_len--) 721 if (lpoutbyte(*cp++, LPMAXSPIN2, &sc->lp_dev)) 722 goto end; 723 } while ((mm = mm->m_next)); 724 725 err = 0; /* no errors were encountered */ 726 727 end: 728 --cp; 729 ppb_wdtr(&sc->lp_dev, txmitl[*cp] ^ 0x17); 730 731 if (err) { /* if we didn't timeout... */ 732 ifp->if_oerrors++; 733 lprintf("X"); 734 } else { 735 ifp->if_opackets++; 736 ifp->if_obytes += m->m_pkthdr.len; 737#if NBPFILTER > 0 738 if (ifp->if_bpf) { 739 /* 740 * We need to prepend the packet type as 741 * a two byte field. Cons up a dummy header 742 * to pacify bpf. This is safe because bpf 743 * will only read from the mbuf (i.e., it won't 744 * try to free it or keep a pointer to it). 745 */ 746 struct mbuf m0; 747 u_short hdr = 0x800; 748 749 m0.m_next = m; 750 m0.m_len = 2; 751 m0.m_data = (char *)&hdr; 752 753 bpf_mtap(ifp, &m0); 754 } 755#endif 756 } 757 758 m_freem(m); 759 760 if (ppb_rstr(&sc->lp_dev) & LPIP_SHAKE) { 761 lprintf("^"); 762 lpintr(ifp->if_unit); 763 } 764 765 (void) splx(s); 766 return 0; 767} 768