if_plip.c revision 43989
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 1.10 1999/02/08 14:12:38 des 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/lpt.h> 103 104#include "opt_plip.h" 105 106#ifndef LPMTU /* MTU for the lp# interfaces */ 107#define LPMTU 1500 108#endif 109 110#ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 111#define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 112#endif 113 114#ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 115#define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 116#endif 117 118#ifndef LPMAXERRS /* Max errors before !RUNNING */ 119#define LPMAXERRS 100 120#endif 121 122#define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 123#define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 124#define MLPIPHDRLEN CLPIPHDRLEN 125 126#define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 127#define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 128#if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 129#define MLPIPHDRLEN LPIPHDRLEN 130#endif 131 132#define LPIPTBLSIZE 256 /* Size of octet translation table */ 133 134#define lprintf if (lptflag) printf 135 136#ifdef PLIP_DEBUG 137static int volatile lptflag = 1; 138#else 139static int volatile lptflag = 0; 140#endif 141 142struct lpt_softc { 143 unsigned short lp_unit; 144 145 struct ppb_device lp_dev; 146 147 struct ifnet sc_if; 148 u_char *sc_ifbuf; 149 int sc_iferrs; 150}; 151 152static int nlp = 0; 153#define MAXPLIP 8 /* XXX not much better! */ 154static struct lpt_softc *lpdata[MAXPLIP]; 155 156 157/* Tables for the lp# interface */ 158static u_char *txmith; 159#define txmitl (txmith+(1*LPIPTBLSIZE)) 160#define trecvh (txmith+(2*LPIPTBLSIZE)) 161#define trecvl (txmith+(3*LPIPTBLSIZE)) 162 163static u_char *ctxmith; 164#define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 165#define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 166#define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 167 168/* Functions for the lp# interface */ 169static struct ppb_device *lpprobe(struct ppb_data *); 170static int lpattach(struct ppb_device *); 171 172static int lpinittables(void); 173static int lpioctl(struct ifnet *, u_long, caddr_t); 174static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 175 struct rtentry *); 176static void lpintr(int); 177 178/* 179 * Make ourselves visible as a ppbus driver 180 */ 181 182static struct ppb_driver lpdriver = { 183 lpprobe, lpattach, "lp" 184}; 185DATA_SET(ppbdriver_set, lpdriver); 186 187 188/* 189 * lpprobe() 190 */ 191static struct ppb_device * 192lpprobe(struct ppb_data *ppb) 193{ 194 struct lpt_softc *lp; 195 196 /* if we haven't interrupts, the probe fails */ 197 if (!ppb->ppb_link->id_irq) { 198 printf("plip: not an interrupt driven port, failed.\n"); 199 return (0); 200 } 201 202 lp = (struct lpt_softc *) malloc(sizeof(struct lpt_softc), 203 M_TEMP, M_NOWAIT); 204 if (!lp) { 205 printf("lp: cannot malloc!\n"); 206 return (0); 207 } 208 bzero(lp, sizeof(struct lpt_softc)); 209 210 lpdata[nlp] = lp; 211 212 /* 213 * lp dependent initialisation. 214 */ 215 lp->lp_unit = nlp; 216 217 if (bootverbose) 218 printf("plip: irq %d\n", ppb->ppb_link->id_irq); 219 220 /* 221 * ppbus dependent initialisation. 222 */ 223 lp->lp_dev.id_unit = lp->lp_unit; 224 lp->lp_dev.name = lpdriver.name; 225 lp->lp_dev.ppb = ppb; 226 lp->lp_dev.intr = lpintr; 227 228 /* Ok, go to next device on next probe */ 229 nlp ++; 230 231 return (&lp->lp_dev); 232} 233 234static int 235lpattach (struct ppb_device *dev) 236{ 237 int unit = dev->id_unit; 238 struct lpt_softc *sc = lpdata[unit]; 239 struct ifnet *ifp = &sc->sc_if; 240 241 /* 242 * Report ourselves 243 */ 244 printf("plip%d: <PLIP network interface> on ppbus %d\n", 245 dev->id_unit, dev->ppb->ppb_link->adapter_unit); 246 247 ifp->if_softc = sc; 248 ifp->if_name = "lp"; 249 ifp->if_unit = unit; 250 ifp->if_mtu = LPMTU; 251 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 252 ifp->if_ioctl = lpioctl; 253 ifp->if_output = lpoutput; 254 ifp->if_type = IFT_PARA; 255 ifp->if_hdrlen = 0; 256 ifp->if_addrlen = 0; 257 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 258 if_attach(ifp); 259 260#if NBPFILTER > 0 261 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t)); 262#endif 263 264 return (1); 265} 266/* 267 * Build the translation tables for the LPIP (BSD unix) protocol. 268 * We don't want to calculate these nasties in our tight loop, so we 269 * precalculate them when we initialize. 270 */ 271static int 272lpinittables (void) 273{ 274 int i; 275 276 if (!txmith) 277 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 278 279 if (!txmith) 280 return 1; 281 282 if (!ctxmith) 283 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 284 285 if (!ctxmith) 286 return 1; 287 288 for (i=0; i < LPIPTBLSIZE; i++) { 289 ctxmith[i] = (i & 0xF0) >> 4; 290 ctxmitl[i] = 0x10 | (i & 0x0F); 291 ctrecvh[i] = (i & 0x78) << 1; 292 ctrecvl[i] = (i & 0x78) >> 3; 293 } 294 295 for (i=0; i < LPIPTBLSIZE; i++) { 296 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 297 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 298 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 299 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 300 } 301 302 return 0; 303} 304 305/* 306 * Process an ioctl request. 307 */ 308 309static int 310lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 311{ 312 struct lpt_softc *sc = lpdata[ifp->if_unit]; 313 struct ifaddr *ifa = (struct ifaddr *)data; 314 struct ifreq *ifr = (struct ifreq *)data; 315 u_char *ptr; 316 int error; 317 318 switch (cmd) { 319 320 case SIOCSIFDSTADDR: 321 case SIOCAIFADDR: 322 case SIOCSIFADDR: 323 if (ifa->ifa_addr->sa_family != AF_INET) 324 return EAFNOSUPPORT; 325 326 ifp->if_flags |= IFF_UP; 327 /* FALLTHROUGH */ 328 case SIOCSIFFLAGS: 329 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 330 331 ppb_wctr(&sc->lp_dev, 0x00); 332 ifp->if_flags &= ~IFF_RUNNING; 333 334 /* IFF_UP is not set, try to release the bus anyway */ 335 ppb_release_bus(&sc->lp_dev); 336 break; 337 } 338 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 339 340 /* XXX 341 * Should the request be interruptible? 342 */ 343 if ((error = ppb_request_bus(&sc->lp_dev, PPB_WAIT|PPB_INTR))) 344 return (error); 345 346 /* Now IFF_UP means that we own the bus */ 347 348 ppb_set_mode(&sc->lp_dev, PPB_COMPATIBLE); 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 u_char 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} 449 450#if NBPFILTER > 0 451static void 452lptap(struct ifnet *ifp, struct mbuf *m) 453{ 454 /* 455 * Send a packet through bpf. We need to prepend the address family 456 * as a four byte field. Cons up a dummy header to pacify bpf. This 457 * is safe because bpf will only read from the mbuf (i.e., it won't 458 * try to free it or keep a pointer to it). 459 */ 460 u_int32_t af = AF_INET; 461 struct mbuf m0; 462 463 m0.m_next = m; 464 m0.m_len = sizeof(u_int32_t); 465 m0.m_data = (char *)⁡ 466 bpf_mtap(ifp, &m0); 467} 468#endif 469 470static void 471lpintr (int unit) 472{ 473 struct lpt_softc *sc = lpdata[unit]; 474 int len, s, j; 475 u_char *bp; 476 u_char c, cl; 477 struct mbuf *top; 478 479 s = splhigh(); 480 481 if (sc->sc_if.if_flags & IFF_LINK0) { 482 483 /* Ack. the request */ 484 ppb_wdtr(&sc->lp_dev, 0x01); 485 486 /* Get the packet length */ 487 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 488 if (j == -1) 489 goto err; 490 len = j; 491 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 492 if (j == -1) 493 goto err; 494 len = len + (j << 8); 495 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 496 goto err; 497 498 bp = sc->sc_ifbuf; 499 500 while (len--) { 501 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 502 if (j == -1) { 503 goto err; 504 } 505 *bp++ = j; 506 } 507 /* Get and ignore checksum */ 508 j = clpinbyte(LPMAXSPIN2, &sc->lp_dev); 509 if (j == -1) { 510 goto err; 511 } 512 513 len = bp - sc->sc_ifbuf; 514 if (len <= CLPIPHDRLEN) 515 goto err; 516 517 sc->sc_iferrs = 0; 518 519 if (IF_QFULL(&ipintrq)) { 520 lprintf("DROP"); 521 IF_DROP(&ipintrq); 522 goto done; 523 } 524 len -= CLPIPHDRLEN; 525 sc->sc_if.if_ipackets++; 526 sc->sc_if.if_ibytes += len; 527 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 528 if (top) { 529#if NBPFILTER > 0 530 if (sc->sc_if.if_bpf) 531 lptap(&sc->sc_if, top); 532#endif 533 IF_ENQUEUE(&ipintrq, top); 534 schednetisr(NETISR_IP); 535 } 536 goto done; 537 } 538 while ((ppb_rstr(&sc->lp_dev) & LPIP_SHAKE)) { 539 len = sc->sc_if.if_mtu + LPIPHDRLEN; 540 bp = sc->sc_ifbuf; 541 while (len--) { 542 543 cl = ppb_rstr(&sc->lp_dev); 544 ppb_wdtr(&sc->lp_dev, 8); 545 546 j = LPMAXSPIN2; 547 while((ppb_rstr(&sc->lp_dev) & LPIP_SHAKE)) 548 if(!--j) goto err; 549 550 c = ppb_rstr(&sc->lp_dev); 551 ppb_wdtr(&sc->lp_dev, 0); 552 553 *bp++= trecvh[cl] | trecvl[c]; 554 555 j = LPMAXSPIN2; 556 while (!((cl=ppb_rstr(&sc->lp_dev)) & LPIP_SHAKE)) { 557 if (cl != c && 558 (((cl = ppb_rstr(&sc->lp_dev)) ^ 0xb8) & 0xf8) == 559 (c & 0xf8)) 560 goto end; 561 if (!--j) goto err; 562 } 563 } 564 565 end: 566 len = bp - sc->sc_ifbuf; 567 if (len <= LPIPHDRLEN) 568 goto err; 569 570 sc->sc_iferrs = 0; 571 572 if (IF_QFULL(&ipintrq)) { 573 lprintf("DROP"); 574 IF_DROP(&ipintrq); 575 goto done; 576 } 577 len -= LPIPHDRLEN; 578 sc->sc_if.if_ipackets++; 579 sc->sc_if.if_ibytes += len; 580 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 581 if (top) { 582#if NBPFILTER > 0 583 if (sc->sc_if.if_bpf) 584 lptap(&sc->sc_if, top); 585#endif 586 IF_ENQUEUE(&ipintrq, top); 587 schednetisr(NETISR_IP); 588 } 589 } 590 goto done; 591 592 err: 593 ppb_wdtr(&sc->lp_dev, 0); 594 lprintf("R"); 595 sc->sc_if.if_ierrors++; 596 sc->sc_iferrs++; 597 598 /* 599 * We are not able to send receive anything for now, 600 * so stop wasting our time 601 */ 602 if (sc->sc_iferrs > LPMAXERRS) { 603 printf("lp%d: Too many errors, Going off-line.\n", unit); 604 ppb_wctr(&sc->lp_dev, 0x00); 605 sc->sc_if.if_flags &= ~IFF_RUNNING; 606 sc->sc_iferrs=0; 607 } 608 609 done: 610 splx(s); 611 return; 612} 613 614static __inline int 615lpoutbyte (u_char byte, int spin, struct ppb_device *dev) 616{ 617 ppb_wdtr(dev, txmith[byte]); 618 while (!(ppb_rstr(dev) & LPIP_SHAKE)) 619 if (--spin == 0) 620 return 1; 621 ppb_wdtr(dev, txmitl[byte]); 622 while (ppb_rstr(dev) & LPIP_SHAKE) 623 if (--spin == 0) 624 return 1; 625 return 0; 626} 627 628static int 629lpoutput (struct ifnet *ifp, struct mbuf *m, 630 struct sockaddr *dst, struct rtentry *rt) 631{ 632 struct lpt_softc *sc = lpdata[ifp->if_unit]; 633 int s, err; 634 struct mbuf *mm; 635 u_char *cp = "\0\0"; 636 u_char chksum = 0; 637 int count = 0; 638 int i, len, spin; 639 640 /* We need a sensible value if we abort */ 641 cp++; 642 ifp->if_flags |= IFF_RUNNING; 643 644 err = 1; /* assume we're aborting because of an error */ 645 646 s = splhigh(); 647 648 /* Suspend (on laptops) or receive-errors might have taken us offline */ 649 ppb_wctr(&sc->lp_dev, LPC_ENA); 650 651 if (ifp->if_flags & IFF_LINK0) { 652 653 if (!(ppb_rstr(&sc->lp_dev) & CLPIP_SHAKE)) { 654 lprintf("&"); 655 lpintr(ifp->if_unit); 656 } 657 658 /* Alert other end to pending packet */ 659 spin = LPMAXSPIN1; 660 ppb_wdtr(&sc->lp_dev, 0x08); 661 while ((ppb_rstr(&sc->lp_dev) & 0x08) == 0) 662 if (--spin == 0) { 663 goto nend; 664 } 665 666 /* Calculate length of packet, then send that */ 667 668 count += 14; /* Ethernet header len */ 669 670 mm = m; 671 for (mm = m; mm; mm = mm->m_next) { 672 count += mm->m_len; 673 } 674 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, &sc->lp_dev)) 675 goto nend; 676 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, &sc->lp_dev)) 677 goto nend; 678 679 /* Send dummy ethernet header */ 680 for (i = 0; i < 12; i++) { 681 if (clpoutbyte(i, LPMAXSPIN1, &sc->lp_dev)) 682 goto nend; 683 chksum += i; 684 } 685 686 if (clpoutbyte(0x08, LPMAXSPIN1, &sc->lp_dev)) 687 goto nend; 688 if (clpoutbyte(0x00, LPMAXSPIN1, &sc->lp_dev)) 689 goto nend; 690 chksum += 0x08 + 0x00; /* Add into checksum */ 691 692 mm = m; 693 do { 694 cp = mtod(mm, u_char *); 695 len = mm->m_len; 696 while (len--) { 697 chksum += *cp; 698 if (clpoutbyte(*cp++, LPMAXSPIN2, &sc->lp_dev)) 699 goto nend; 700 } 701 } while ((mm = mm->m_next)); 702 703 /* Send checksum */ 704 if (clpoutbyte(chksum, LPMAXSPIN2, &sc->lp_dev)) 705 goto nend; 706 707 /* Go quiescent */ 708 ppb_wdtr(&sc->lp_dev, 0); 709 710 err = 0; /* No errors */ 711 712 nend: 713 if (err) { /* if we didn't timeout... */ 714 ifp->if_oerrors++; 715 lprintf("X"); 716 } else { 717 ifp->if_opackets++; 718 ifp->if_obytes += m->m_pkthdr.len; 719#if NBPFILTER > 0 720 if (ifp->if_bpf) 721 lptap(ifp, m); 722#endif 723 } 724 725 m_freem(m); 726 727 if (!(ppb_rstr(&sc->lp_dev) & CLPIP_SHAKE)) { 728 lprintf("^"); 729 lpintr(ifp->if_unit); 730 } 731 (void) splx(s); 732 return 0; 733 } 734 735 if (ppb_rstr(&sc->lp_dev) & LPIP_SHAKE) { 736 lprintf("&"); 737 lpintr(ifp->if_unit); 738 } 739 740 if (lpoutbyte(0x08, LPMAXSPIN1, &sc->lp_dev)) 741 goto end; 742 if (lpoutbyte(0x00, LPMAXSPIN2, &sc->lp_dev)) 743 goto end; 744 745 mm = m; 746 do { 747 cp = mtod(mm,u_char *); 748 len = mm->m_len; 749 while (len--) 750 if (lpoutbyte(*cp++, LPMAXSPIN2, &sc->lp_dev)) 751 goto end; 752 } while ((mm = mm->m_next)); 753 754 err = 0; /* no errors were encountered */ 755 756 end: 757 --cp; 758 ppb_wdtr(&sc->lp_dev, txmitl[*cp] ^ 0x17); 759 760 if (err) { /* if we didn't timeout... */ 761 ifp->if_oerrors++; 762 lprintf("X"); 763 } else { 764 ifp->if_opackets++; 765 ifp->if_obytes += m->m_pkthdr.len; 766#if NBPFILTER > 0 767 if (ifp->if_bpf) 768 lptap(ifp, m); 769#endif 770 } 771 772 m_freem(m); 773 774 if (ppb_rstr(&sc->lp_dev) & LPIP_SHAKE) { 775 lprintf("^"); 776 lpintr(ifp->if_unit); 777 } 778 779 (void) splx(s); 780 return 0; 781} 782