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 1.2 1998/08/12 18:02:48 bde 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 #define DEBUG 133 134 #ifndef DEBUG 135 #define lprintf (void) 136 #else 137 #define lprintf if (lptflag) printf 138 static int volatile lptflag = 1; 139 #endif 140 141 struct lpt_softc { 142 unsigned short lp_unit; 143 144 struct ppb_device lp_dev; 145 146 struct ifnet sc_if; 147 u_char *sc_ifbuf; 148 int sc_iferrs; 149 }; 150 151 static int nlp = 0; 152 #define MAXPLIP 8 /* XXX not much better! */ 153 static struct lpt_softc *lpdata[MAXPLIP]; 154 155 156 /* Tables for the lp# interface */ 157 static u_char *txmith; 158 #define txmitl (txmith+(1*LPIPTBLSIZE)) 159 #define trecvh (txmith+(2*LPIPTBLSIZE)) 160 #define trecvl (txmith+(3*LPIPTBLSIZE)) 161 162 static u_char *ctxmith; 163 #define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 164 #define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 165 #define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 166 167 /* Functions for the lp# interface */ 168 static struct ppb_device *lpprobe(struct ppb_data *); 169 static int lpattach(struct ppb_device *); 170 171 static int lpinittables(void); 172 static int lpioctl(struct ifnet *, u_long, caddr_t); 173 static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 174 struct rtentry *); 175 static void lpintr(int); 176 177 /* 178 * Make ourselves visible as a ppbus driver 179 */ 180 181 static struct ppb_driver lpdriver = { 182 lpprobe, lpattach, "lp" 183 }; 184 DATA_SET(ppbdriver_set, lpdriver); 185 186 187 /* 188 * lpprobe() 189 */ 190 static struct ppb_device * 191 lpprobe(struct ppb_data *ppb) 192 { 193 struct lpt_softc *lp; 194 195 /* if we haven't interrupts, the probe fails */ 196 if (!ppb->ppb_link->id_irq) 197 return (0); 198 199 lp = (struct lpt_softc *) malloc(sizeof(struct lpt_softc), 200 M_TEMP, M_NOWAIT); 201 if (!lp) { 202 printf("lp: cannot malloc!\n"); 203 return (0); 204 } 205 bzero(lp, sizeof(struct lpt_softc)); 206 207 lpdata[nlp] = lp; 208 209 /* 210 * lp dependent initialisation. 211 */ 212 lp->lp_unit = nlp; 213 214 if (bootverbose) 215 printf("plip: irq %d", ppb->ppb_link->id_irq); 216 217 /* 218 * ppbus dependent initialisation. 219 */ 220 lp->lp_dev.id_unit = lp->lp_unit; 221 lp->lp_dev.name = lpdriver.name; 222 lp->lp_dev.ppb = ppb; 223 lp->lp_dev.intr = lpintr; 224 225 /* Ok, go to next device on next probe */ 226 nlp ++; 227 228 return (&lp->lp_dev); 229 } 230 231 static int 232 lpattach (struct ppb_device *dev) 233 { 234 int unit = dev->id_unit; 235 struct lpt_softc *sc = lpdata[unit]; 236 struct ifnet *ifp = &sc->sc_if; 237 238 /* 239 * Report ourselves 240 */ 241 printf("plip%d: <PLIP network interface> on ppbus %d\n", 242 dev->id_unit, dev->ppb->ppb_link->adapter_unit); 243 244 ifp->if_softc = sc; 245 ifp->if_name = "lp"; 246 ifp->if_unit = unit; 247 ifp->if_mtu = LPMTU; 248 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 249 ifp->if_ioctl = lpioctl; 250 ifp->if_output = lpoutput; 251 ifp->if_type = IFT_PARA; 252 ifp->if_hdrlen = 0; 253 ifp->if_addrlen = 0; 254 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 255 if_attach(ifp); 256 257 #if NBPFILTER > 0 258 bpfattach(ifp, DLT_NULL, LPIPHDRLEN); 259 #endif 260 261 return (1); 262 } 263 /* 264 * Build the translation tables for the LPIP (BSD unix) protocol. 265 * We don't want to calculate these nasties in our tight loop, so we 266 * precalculate them when we initialize. 267 */ 268 static int 269 lpinittables (void) 270 { 271 int i; 272 273 if (!txmith) 274 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 275 276 if (!txmith) 277 return 1; 278 279 if (!ctxmith) 280 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 281 282 if (!ctxmith) 283 return 1; 284 285 for (i=0; i < LPIPTBLSIZE; i++) { 286 ctxmith[i] = (i & 0xF0) >> 4; 287 ctxmitl[i] = 0x10 | (i & 0x0F); 288 ctrecvh[i] = (i & 0x78) << 1; 289 ctrecvl[i] = (i & 0x78) >> 3; 290 } 291 292 for (i=0; i < LPIPTBLSIZE; i++) { 293 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 294 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 295 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 296 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 297 } 298 299 return 0; 300 } 301 302 /* 303 * Process an ioctl request. 304 */ 305 306 static int 307 lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 308 { 309 struct lpt_softc *sc = lpdata[ifp->if_unit]; 310 struct ifaddr *ifa = (struct ifaddr *)data; 311 struct ifreq *ifr = (struct ifreq *)data; 312 u_char *ptr; 313 int error; 314 315 switch (cmd) { 316 317 case SIOCSIFDSTADDR: 318 case SIOCAIFADDR: 319 case SIOCSIFADDR: 320 if (ifa->ifa_addr->sa_family != AF_INET) 321 return EAFNOSUPPORT; 322 323 ifp->if_flags |= IFF_UP; 324 /* FALLTHROUGH */ 325 case SIOCSIFFLAGS: 326 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 327 328 ppb_wctr(&sc->lp_dev, 0x00); 329 ifp->if_flags &= ~IFF_RUNNING; 330 331 /* IFF_UP is not set, try to release the bus anyway */ 332 ppb_release_bus(&sc->lp_dev); 333 break; 334 } 335 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 336 337 /* 338 * Try to allocate the ppbus as soon as possible 339 * With ppbus allocation, interrupts are enabled 340 * Now IFF_UP means that we own the bus 341 * 342 * XXX 343 * Should the request be interruptible? 344 */ 345 if ((error = ppb_request_bus(&sc->lp_dev, PPB_WAIT|PPB_INTR))) 346 return (error); 347 348 if (lpinittables()) { 349 ppb_release_bus(&sc->lp_dev); 350 return ENOBUFS; 351 } 352 353 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 354 M_DEVBUF, M_WAITOK); 355 if (!sc->sc_ifbuf) { 356 ppb_release_bus(&sc->lp_dev); 357 return ENOBUFS; 358 } 359 360 ppb_wctr(&sc->lp_dev, LPC_ENA); 361 ifp->if_flags |= IFF_RUNNING; 362 } 363 break; 364 365 case SIOCSIFMTU: 366 ptr = sc->sc_ifbuf; 367 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 368 if (!sc->sc_ifbuf) { 369 sc->sc_ifbuf = ptr; 370 return ENOBUFS; 371 } 372 if (ptr) 373 free(ptr,M_DEVBUF); 374 sc->sc_if.if_mtu = ifr->ifr_mtu; 375 break; 376 377 case SIOCGIFMTU: 378 ifr->ifr_mtu = sc->sc_if.if_mtu; 379 break; 380 381 case SIOCADDMULTI: 382 case SIOCDELMULTI: 383 if (ifr == 0) { 384 return EAFNOSUPPORT; /* XXX */ 385 } 386 switch (ifr->ifr_addr.sa_family) { 387 388 case AF_INET: 389 break; 390 391 default: 392 return EAFNOSUPPORT; 393 } 394 break; 395 396 default: 397 lprintf("LP:ioctl(0x%lx)\n", cmd); 398 return EINVAL; 399 } 400 return 0; 401 } 402 403 static __inline int 404 clpoutbyte (u_char byte, int spin, struct ppb_device *dev) 405 { 406 ppb_wdtr(dev, ctxmitl[byte]); 407 while (ppb_rstr(dev) & CLPIP_SHAKE) 408 if (--spin == 0) { 409 return 1; 410 } 411 ppb_wdtr(dev, ctxmith[byte]); 412 while (!(ppb_rstr(dev) & CLPIP_SHAKE)) 413 if (--spin == 0) { 414 return 1; 415 } 416 return 0; 417 } 418 419 static __inline int 420 clpinbyte (int spin, struct ppb_device *dev) 421 { 422 int c, cl; 423 424 while((ppb_rstr(dev) & CLPIP_SHAKE)) 425 if(!--spin) { 426 return -1; 427 } 428 cl = ppb_rstr(dev); 429 ppb_wdtr(dev, 0x10); 430 431 while(!(ppb_rstr(dev) & CLPIP_SHAKE)) 432 if(!--spin) { 433 return -1; 434 } 435 c = ppb_rstr(dev); 436 ppb_wdtr(dev, 0x00); 437 438 return (ctrecvl[cl] | ctrecvh[c]); 439 } 440 441 static void 442 lpintr (int unit) 443 { 444 struct lpt_softc *sc = lpdata[unit]; 445 int len, s, j; 446 u_char *bp; 447 u_char c, cl; 448 struct mbuf *top; 449 450 s = splhigh(); 451 452 if (sc->sc_if.if_flags & IFF_LINK0) { 453 454 /* Ack. the request */ 455 ppb_wdtr(&sc->lp_dev, 0x01); 456 457 /* Get the packet length */ 458 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 459 if (j == -1) 460 goto err; 461 len = j; 462 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 463 if (j == -1) 464 goto err; 465 len = len + (j << 8); 466 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 467 goto err; 468 469 bp = sc->sc_ifbuf; 470 471 while (len--) { 472 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 473 if (j == -1) { 474 goto err; 475 } 476 *bp++ = j; 477 } 478 /* Get and ignore checksum */ 479 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 480 if (j == -1) { 481 goto err; 482 } 483 484 len = bp - sc->sc_ifbuf; 485 if (len <= CLPIPHDRLEN) 486 goto err; 487 488 sc->sc_iferrs = 0; 489 490 if (IF_QFULL(&ipintrq)) { 491 lprintf("DROP"); 492 IF_DROP(&ipintrq); 493 goto done; 494 } 495 len -= CLPIPHDRLEN; 496 sc->sc_if.if_ipackets++; 497 sc->sc_if.if_ibytes += len; 498 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 499 if (top) { 500 IF_ENQUEUE(&ipintrq, top); 501 schednetisr(NETISR_IP); 502 } 503 goto done; 504 } 505 while ((ppb_rstr(&sc->lp_dev) & LPIP_SHAKE)) { 506 len = sc->sc_if.if_mtu + LPIPHDRLEN; 507 bp = sc->sc_ifbuf; 508 while (len--) { 509 510 cl = ppb_rstr(&sc->lp_dev); 511 ppb_wdtr(&sc->lp_dev, 8); 512 513 j = LPMAXSPIN2; 514 while((ppb_rstr(&sc->lp_dev) & LPIP_SHAKE)) 515 if(!--j) goto err; 516 517 c = ppb_rstr(&sc->lp_dev); 518 ppb_wdtr(&sc->lp_dev, 0); 519 520 *bp++= trecvh[cl] | trecvl[c]; 521 522 j = LPMAXSPIN2; 523 while (!((cl=ppb_rstr(&sc->lp_dev)) & LPIP_SHAKE)) { 524 if (cl != c && 525 (((cl = ppb_rstr(&sc->lp_dev)) ^ 0xb8) & 0xf8) == 526 (c & 0xf8)) 527 goto end; 528 if (!--j) goto err; 529 } 530 } 531 532 end: 533 len = bp - sc->sc_ifbuf; 534 if (len <= LPIPHDRLEN) 535 goto err; 536 537 sc->sc_iferrs = 0; 538 539 if (IF_QFULL(&ipintrq)) { 540 lprintf("DROP"); 541 IF_DROP(&ipintrq); 542 goto done; 543 } 544 #if NBPFILTER > 0 545 if (sc->sc_if.if_bpf) { 546 bpf_tap(&sc->sc_if, sc->sc_ifbuf, len); 547 } 548 #endif 549 len -= LPIPHDRLEN; 550 sc->sc_if.if_ipackets++; 551 sc->sc_if.if_ibytes += len; 552 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 553 if (top) { 554 IF_ENQUEUE(&ipintrq, top); 555 schednetisr(NETISR_IP); 556 } 557 } 558 goto done; 559 560 err: 561 ppb_wdtr(&sc->lp_dev, 0); 562 lprintf("R"); 563 sc->sc_if.if_ierrors++; 564 sc->sc_iferrs++; 565 566 /* 567 * We are not able to send receive anything for now, 568 * so stop wasting our time 569 */ 570 if (sc->sc_iferrs > LPMAXERRS) { 571 printf("lp%d: Too many errors, Going off-line.\n", unit); 572 ppb_wctr(&sc->lp_dev, 0x00); 573 sc->sc_if.if_flags &= ~IFF_RUNNING; 574 sc->sc_iferrs=0; 575 } 576 577 done: 578 splx(s); 579 return; 580 } 581 582 static __inline int 583 lpoutbyte (u_char byte, int spin, struct ppb_device *dev) 584 { 585 ppb_wdtr(dev, txmith[byte]); 586 while (!(ppb_rstr(dev) & LPIP_SHAKE)) 587 if (--spin == 0) 588 return 1; 589 ppb_wdtr(dev, txmitl[byte]); 590 while (ppb_rstr(dev) & LPIP_SHAKE) 591 if (--spin == 0) 592 return 1; 593 return 0; 594 } 595 596 static int 597 lpoutput (struct ifnet *ifp, struct mbuf *m, 598 struct sockaddr *dst, struct rtentry *rt) 599 { 600 struct lpt_softc *sc = lpdata[ifp->if_unit]; 601 int s, err; 602 struct mbuf *mm; 603 u_char *cp = "\0\0"; 604 u_char chksum = 0; 605 int count = 0; 606 int i; 607 int spin; 608 609 /* We need a sensible value if we abort */ 610 cp++; 611 ifp->if_flags |= IFF_RUNNING; 612 613 err = 1; /* assume we're aborting because of an error */ 614 615 s = splhigh(); 616 617 /* Suspend (on laptops) or receive-errors might have taken us offline */ 618 ppb_wctr(&sc->lp_dev, LPC_ENA); 619 620 if (ifp->if_flags & IFF_LINK0) { 621 622 if (!(ppb_rstr(&sc->lp_dev) & CLPIP_SHAKE)) { 623 lprintf("&"); 624 lpintr(ifp->if_unit); 625 } 626 627 /* Alert other end to pending packet */ 628 spin = LPMAXSPIN1; 629 ppb_wdtr(&sc->lp_dev, 0x08); 630 while ((ppb_rstr(&sc->lp_dev) & 0x08) == 0) 631 if (--spin == 0) { 632 goto nend; 633 } 634 635 /* Calculate length of packet, then send that */ 636 637 count += 14; /* Ethernet header len */ 638 639 mm = m; 640 for (mm = m; mm; mm = mm->m_next) { 641 count += mm->m_len; 642 } 643 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, &sc->lp_dev)) 644 goto nend; 645 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, &sc->lp_dev)) 646 goto nend; 647 648 /* Send dummy ethernet header */ 649 for (i = 0; i < 12; i++) { 650 if (clpoutbyte(i, LPMAXSPIN1, &sc->lp_dev)) 651 goto nend; 652 chksum += i; 653 } 654 655 if (clpoutbyte(0x08, LPMAXSPIN1, &sc->lp_dev)) 656 goto nend; 657 if (clpoutbyte(0x00, LPMAXSPIN1, &sc->lp_dev)) 658 goto nend; 659 chksum += 0x08 + 0x00; /* Add into checksum */ 660 661 mm = m; 662 do { 663 cp = mtod(mm, u_char *); 664 while (mm->m_len--) { 665 chksum += *cp; 666 if (clpoutbyte(*cp++, LPMAXSPIN2, &sc->lp_dev)) 667 goto nend; 668 } 669 } while ((mm = mm->m_next)); 670 671 /* Send checksum */ 672 if (clpoutbyte(chksum, LPMAXSPIN2, &sc->lp_dev)) 673 goto nend; 674 675 /* Go quiescent */ 676 ppb_wdtr(&sc->lp_dev, 0); 677 678 err = 0; /* No errors */ 679 680 nend: 681 if (err) { /* if we didn't timeout... */ 682 ifp->if_oerrors++; 683 lprintf("X"); 684 } else { 685 ifp->if_opackets++; 686 ifp->if_obytes += m->m_pkthdr.len; 687 } 688 689 m_freem(m); 690 691 if (!(ppb_rstr(&sc->lp_dev) & CLPIP_SHAKE)) { 692 lprintf("^"); 693 lpintr(ifp->if_unit); 694 } 695 (void) splx(s); 696 return 0; 697 } 698 699 if (ppb_rstr(&sc->lp_dev) & LPIP_SHAKE) { 700 lprintf("&"); 701 lpintr(ifp->if_unit); 702 } 703 704 if (lpoutbyte(0x08, LPMAXSPIN1, &sc->lp_dev)) 705 goto end; 706 if (lpoutbyte(0x00, LPMAXSPIN2, &sc->lp_dev)) 707 goto end; 708 709 mm = m; 710 do { 711 cp = mtod(mm,u_char *); 712 while (mm->m_len--) 713 if (lpoutbyte(*cp++, LPMAXSPIN2, &sc->lp_dev)) 714 goto end; 715 } while ((mm = mm->m_next)); 716 717 err = 0; /* no errors were encountered */ 718 719 end: 720 --cp; 721 ppb_wdtr(&sc->lp_dev, txmitl[*cp] ^ 0x17); 722 723 if (err) { /* if we didn't timeout... */ 724 ifp->if_oerrors++; 725 lprintf("X"); 726 } else { 727 ifp->if_opackets++; 728 ifp->if_obytes += m->m_pkthdr.len; 729 #if NBPFILTER > 0 730 if (ifp->if_bpf) { 731 /* 732 * We need to prepend the packet type as 733 * a two byte field. Cons up a dummy header 734 * to pacify bpf. This is safe because bpf 735 * will only read from the mbuf (i.e., it won't 736 * try to free it or keep a pointer to it). 737 */ 738 struct mbuf m0; 739 u_short hdr = 0x800; 740 741 m0.m_next = m; 742 m0.m_len = 2; 743 m0.m_data = (char *)&hdr; 744 745 bpf_mtap(ifp, &m0); 746 } 747 #endif 748 } 749 750 m_freem(m); 751 752 if (ppb_rstr(&sc->lp_dev) & LPIP_SHAKE) { 753 lprintf("^"); 754 lpintr(ifp->if_unit); 755 } 756 757 (void) splx(s); 758 return 0; 759 } 760