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 * $FreeBSD: src/sys/dev/ppbus/if_plip.c,v 1.19.2.1 2000/05/24 00:20:57 n_hibma Exp $ 28 * $DragonFly: src/sys/dev/netif/plip/if_plip.c,v 1.13 2005/08/29 10:19:52 sephe Exp $ 29 */ 30 31 /* 32 * Parallel port TCP/IP interfaces added. I looked at the driver from 33 * MACH but this is a complete rewrite, and btw. incompatible, and it 34 * should perform better too. I have never run the MACH driver though. 35 * 36 * This driver sends two bytes (0x08, 0x00) in front of each packet, 37 * to allow us to distinguish another format later. 38 * 39 * Now added an Linux/Crynwr compatibility mode which is enabled using 40 * IF_LINK0 - Tim Wilkinson. 41 * 42 * TODO: 43 * Make HDLC/PPP mode, use IF_LLC1 to enable. 44 * 45 * Connect the two computers using a Laplink parallel cable to use this 46 * feature: 47 * 48 * +----------------------------------------+ 49 * |A-name A-End B-End Descr. Port/Bit | 50 * +----------------------------------------+ 51 * |DATA0 2 15 Data 0/0x01 | 52 * |-ERROR 15 2 1/0x08 | 53 * +----------------------------------------+ 54 * |DATA1 3 13 Data 0/0x02 | 55 * |+SLCT 13 3 1/0x10 | 56 * +----------------------------------------+ 57 * |DATA2 4 12 Data 0/0x04 | 58 * |+PE 12 4 1/0x20 | 59 * +----------------------------------------+ 60 * |DATA3 5 10 Strobe 0/0x08 | 61 * |-ACK 10 5 1/0x40 | 62 * +----------------------------------------+ 63 * |DATA4 6 11 Data 0/0x10 | 64 * |BUSY 11 6 1/~0x80 | 65 * +----------------------------------------+ 66 * |GND 18-25 18-25 GND - | 67 * +----------------------------------------+ 68 * 69 * Expect transfer-rates up to 75 kbyte/sec. 70 * 71 * If GCC could correctly grok 72 * register int port asm("edx") 73 * the code would be cleaner 74 * 75 * Poul-Henning Kamp <phk@freebsd.org> 76 */ 77 78 /* 79 * Update for ppbus, PLIP support only - Nicolas Souchu 80 */ 81 82 #include "opt_plip.h" 83 84 #include <sys/param.h> 85 #include <sys/systm.h> 86 #include <sys/module.h> 87 #include <sys/bus.h> 88 #include <sys/mbuf.h> 89 #include <sys/socket.h> 90 #include <sys/sockio.h> 91 #include <sys/kernel.h> 92 #include <sys/malloc.h> 93 #include <sys/thread2.h> 94 95 #include <machine/clock.h> 96 #include <machine/bus.h> 97 #include <machine/resource.h> 98 #include <sys/rman.h> 99 100 #include <net/if.h> 101 #include <net/ifq_var.h> 102 #include <net/if_types.h> 103 #include <net/netisr.h> 104 105 #include <netinet/in.h> 106 #include <netinet/in_var.h> 107 108 #include <net/bpf.h> 109 110 #include <bus/ppbus/ppbconf.h> 111 #include "ppbus_if.h" 112 #include <bus/ppbus/ppbio.h> 113 114 #ifndef LPMTU /* MTU for the lp# interfaces */ 115 #define LPMTU 1500 116 #endif 117 118 #ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 119 #define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 120 #endif 121 122 #ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 123 #define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 124 #endif 125 126 #ifndef LPMAXERRS /* Max errors before !RUNNING */ 127 #define LPMAXERRS 100 128 #endif 129 130 #define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 131 #define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 132 #define MLPIPHDRLEN CLPIPHDRLEN 133 134 #define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 135 #define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 136 #if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 137 #define MLPIPHDRLEN LPIPHDRLEN 138 #endif 139 140 #define LPIPTBLSIZE 256 /* Size of octet translation table */ 141 142 #define lprintf if (lptflag) printf 143 144 #ifdef PLIP_DEBUG 145 static int volatile lptflag = 1; 146 #else 147 static int volatile lptflag = 0; 148 #endif 149 150 struct lp_data { 151 unsigned short lp_unit; 152 153 struct ifnet sc_if; 154 u_char *sc_ifbuf; 155 int sc_iferrs; 156 157 struct resource *res_irq; 158 }; 159 160 /* Tables for the lp# interface */ 161 static u_char *txmith; 162 #define txmitl (txmith+(1*LPIPTBLSIZE)) 163 #define trecvh (txmith+(2*LPIPTBLSIZE)) 164 #define trecvl (txmith+(3*LPIPTBLSIZE)) 165 166 static u_char *ctxmith; 167 #define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 168 #define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 169 #define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 170 171 /* Functions for the lp# interface */ 172 static int lpinittables(void); 173 static int lpioctl(struct ifnet *, u_long, caddr_t, struct ucred *); 174 static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 175 struct rtentry *); 176 static void lp_intr(void *); 177 178 #define DEVTOSOFTC(dev) \ 179 ((struct lp_data *)device_get_softc(dev)) 180 #define UNITOSOFTC(unit) \ 181 ((struct lp_data *)devclass_get_softc(lp_devclass, (unit))) 182 #define UNITODEVICE(unit) \ 183 (devclass_get_device(lp_devclass, (unit))) 184 185 static devclass_t lp_devclass; 186 187 static void 188 lp_identify(driver_t *driver, device_t parent) 189 { 190 191 BUS_ADD_CHILD(parent, 0, "plip", 0); 192 } 193 /* 194 * lpprobe() 195 */ 196 static int 197 lp_probe(device_t dev) 198 { 199 device_t ppbus = device_get_parent(dev); 200 struct lp_data *lp; 201 int zero = 0; 202 uintptr_t irq; 203 204 lp = DEVTOSOFTC(dev); 205 206 /* retrieve the ppbus irq */ 207 BUS_READ_IVAR(ppbus, dev, PPBUS_IVAR_IRQ, &irq); 208 209 /* if we haven't interrupts, the probe fails */ 210 if (irq == -1) { 211 device_printf(dev, "not an interrupt driven port, failed.\n"); 212 return (ENXIO); 213 } 214 215 /* reserve the interrupt resource, expecting irq is available to continue */ 216 lp->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &zero, irq, irq, 1, 217 RF_SHAREABLE); 218 if (lp->res_irq == 0) { 219 device_printf(dev, "cannot reserve interrupt, failed.\n"); 220 return (ENXIO); 221 } 222 223 /* 224 * lp dependent initialisation. 225 */ 226 lp->lp_unit = device_get_unit(dev); 227 228 device_set_desc(dev, "PLIP network interface"); 229 230 return (0); 231 } 232 233 static int 234 lp_attach (device_t dev) 235 { 236 struct lp_data *lp = DEVTOSOFTC(dev); 237 struct ifnet *ifp = &lp->sc_if; 238 239 ifp->if_softc = lp; 240 if_initname(ifp, "lp", device_get_unit(dev)); 241 ifp->if_mtu = LPMTU; 242 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 243 ifp->if_ioctl = lpioctl; 244 ifp->if_output = lpoutput; 245 ifp->if_type = IFT_PARA; 246 ifp->if_hdrlen = 0; 247 ifp->if_addrlen = 0; 248 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN); 249 if_attach(ifp); 250 251 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t)); 252 253 return (0); 254 } 255 /* 256 * Build the translation tables for the LPIP (BSD unix) protocol. 257 * We don't want to calculate these nasties in our tight loop, so we 258 * precalculate them when we initialize. 259 */ 260 static int 261 lpinittables (void) 262 { 263 int i; 264 265 if (!txmith) 266 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_WAITOK); 267 268 if (!ctxmith) 269 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_WAITOK); 270 271 for (i=0; i < LPIPTBLSIZE; i++) { 272 ctxmith[i] = (i & 0xF0) >> 4; 273 ctxmitl[i] = 0x10 | (i & 0x0F); 274 ctrecvh[i] = (i & 0x78) << 1; 275 ctrecvl[i] = (i & 0x78) >> 3; 276 } 277 278 for (i=0; i < LPIPTBLSIZE; i++) { 279 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 280 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 281 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 282 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 283 } 284 285 return 0; 286 } 287 288 /* 289 * Process an ioctl request. 290 */ 291 292 static int 293 lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 294 { 295 device_t dev = UNITODEVICE(ifp->if_dunit); 296 device_t ppbus = device_get_parent(dev); 297 struct lp_data *sc = DEVTOSOFTC(dev); 298 struct ifaddr *ifa = (struct ifaddr *)data; 299 struct ifreq *ifr = (struct ifreq *)data; 300 u_char *ptr; 301 void *ih; 302 int error; 303 304 switch (cmd) { 305 306 case SIOCSIFDSTADDR: 307 case SIOCAIFADDR: 308 case SIOCSIFADDR: 309 if (ifa->ifa_addr->sa_family != AF_INET) 310 return EAFNOSUPPORT; 311 312 ifp->if_flags |= IFF_UP; 313 /* FALLTHROUGH */ 314 case SIOCSIFFLAGS: 315 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 316 317 ppb_wctr(ppbus, 0x00); 318 ifp->if_flags &= ~IFF_RUNNING; 319 320 /* IFF_UP is not set, try to release the bus anyway */ 321 ppb_release_bus(ppbus, dev); 322 break; 323 } 324 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 325 326 /* XXX 327 * Should the request be interruptible? 328 */ 329 if ((error = ppb_request_bus(ppbus, dev, PPB_WAIT|PPB_INTR))) 330 return (error); 331 332 /* Now IFF_UP means that we own the bus */ 333 334 ppb_set_mode(ppbus, PPB_COMPATIBLE); 335 336 if (lpinittables()) { 337 ppb_release_bus(ppbus, dev); 338 return ENOBUFS; 339 } 340 341 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 342 M_DEVBUF, M_WAITOK); 343 if (!sc->sc_ifbuf) { 344 ppb_release_bus(ppbus, dev); 345 return ENOBUFS; 346 } 347 348 /* attach our interrupt handler, later detached when the bus is released */ 349 error = BUS_SETUP_INTR(ppbus, dev, sc->res_irq, INTR_TYPE_NET, 350 lp_intr, dev, &ih, NULL); 351 if (error) { 352 ppb_release_bus(ppbus, dev); 353 return (error); 354 } 355 356 ppb_wctr(ppbus, IRQENABLE); 357 ifp->if_flags |= IFF_RUNNING; 358 } 359 break; 360 361 case SIOCSIFMTU: 362 ptr = sc->sc_ifbuf; 363 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_WAITOK); 364 if (ptr) 365 free(ptr,M_DEVBUF); 366 sc->sc_if.if_mtu = ifr->ifr_mtu; 367 break; 368 369 case SIOCGIFMTU: 370 ifr->ifr_mtu = sc->sc_if.if_mtu; 371 break; 372 373 case SIOCADDMULTI: 374 case SIOCDELMULTI: 375 if (ifr == 0) { 376 return EAFNOSUPPORT; /* XXX */ 377 } 378 switch (ifr->ifr_addr.sa_family) { 379 380 case AF_INET: 381 break; 382 383 default: 384 return EAFNOSUPPORT; 385 } 386 break; 387 388 case SIOCGIFMEDIA: 389 /* 390 * No ifmedia support at this stage; maybe use it 391 * in future for eg. protocol selection. 392 */ 393 return EINVAL; 394 395 default: 396 lprintf("LP:ioctl(0x%lx)\n", cmd); 397 return EINVAL; 398 } 399 return 0; 400 } 401 402 static __inline int 403 clpoutbyte (u_char byte, int spin, device_t ppbus) 404 { 405 ppb_wdtr(ppbus, ctxmitl[byte]); 406 while (ppb_rstr(ppbus) & CLPIP_SHAKE) 407 if (--spin == 0) { 408 return 1; 409 } 410 ppb_wdtr(ppbus, ctxmith[byte]); 411 while (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 412 if (--spin == 0) { 413 return 1; 414 } 415 return 0; 416 } 417 418 static __inline int 419 clpinbyte (int spin, device_t ppbus) 420 { 421 u_char c, cl; 422 423 while((ppb_rstr(ppbus) & CLPIP_SHAKE)) 424 if(!--spin) { 425 return -1; 426 } 427 cl = ppb_rstr(ppbus); 428 ppb_wdtr(ppbus, 0x10); 429 430 while(!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 431 if(!--spin) { 432 return -1; 433 } 434 c = ppb_rstr(ppbus); 435 ppb_wdtr(ppbus, 0x00); 436 437 return (ctrecvl[cl] | ctrecvh[c]); 438 } 439 440 static void 441 lptap(struct ifnet *ifp, struct mbuf *m) 442 { 443 /* 444 * We need to prepend the address family as a four byte field. 445 */ 446 static const uint32_t af = AF_INET; 447 448 if (ifp->if_bpf) 449 bpf_ptap(ifp->if_bpf, m, &af, sizeof(af)); 450 } 451 452 static void 453 lp_intr (void *arg) 454 { 455 device_t dev = (device_t)arg; 456 device_t ppbus = device_get_parent(dev); 457 struct lp_data *sc = DEVTOSOFTC(dev); 458 int len, j; 459 u_char *bp; 460 u_char c, cl; 461 struct mbuf *top; 462 463 crit_enter(); 464 465 if (sc->sc_if.if_flags & IFF_LINK0) { 466 467 /* Ack. the request */ 468 ppb_wdtr(ppbus, 0x01); 469 470 /* Get the packet length */ 471 j = clpinbyte(LPMAXSPIN2, ppbus); 472 if (j == -1) 473 goto err; 474 len = j; 475 j = clpinbyte(LPMAXSPIN2, ppbus); 476 if (j == -1) 477 goto err; 478 len = len + (j << 8); 479 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 480 goto err; 481 482 bp = sc->sc_ifbuf; 483 484 while (len--) { 485 j = clpinbyte(LPMAXSPIN2, ppbus); 486 if (j == -1) { 487 goto err; 488 } 489 *bp++ = j; 490 } 491 /* Get and ignore checksum */ 492 j = clpinbyte(LPMAXSPIN2, ppbus); 493 if (j == -1) { 494 goto err; 495 } 496 497 len = bp - sc->sc_ifbuf; 498 if (len <= CLPIPHDRLEN) 499 goto err; 500 501 sc->sc_iferrs = 0; 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 (sc->sc_if.if_bpf) 509 lptap(&sc->sc_if, top); 510 netisr_queue(NETISR_IP, top); 511 } 512 goto done; 513 } 514 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) { 515 len = sc->sc_if.if_mtu + LPIPHDRLEN; 516 bp = sc->sc_ifbuf; 517 while (len--) { 518 519 cl = ppb_rstr(ppbus); 520 ppb_wdtr(ppbus, 8); 521 522 j = LPMAXSPIN2; 523 while((ppb_rstr(ppbus) & LPIP_SHAKE)) 524 if(!--j) goto err; 525 526 c = ppb_rstr(ppbus); 527 ppb_wdtr(ppbus, 0); 528 529 *bp++= trecvh[cl] | trecvl[c]; 530 531 j = LPMAXSPIN2; 532 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) { 533 if (cl != c && 534 (((cl = ppb_rstr(ppbus)) ^ 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 len -= LPIPHDRLEN; 549 sc->sc_if.if_ipackets++; 550 sc->sc_if.if_ibytes += len; 551 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 552 if (top) { 553 if (sc->sc_if.if_bpf) 554 lptap(&sc->sc_if, top); 555 netisr_queue(NETISR_IP, top); 556 } 557 } 558 goto done; 559 560 err: 561 ppb_wdtr(ppbus, 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", device_get_unit(dev)); 572 ppb_wctr(ppbus, 0x00); 573 sc->sc_if.if_flags &= ~IFF_RUNNING; 574 sc->sc_iferrs=0; 575 } 576 577 done: 578 crit_exit(); 579 return; 580 } 581 582 static __inline int 583 lpoutbyte (u_char byte, int spin, device_t ppbus) 584 { 585 ppb_wdtr(ppbus, txmith[byte]); 586 while (!(ppb_rstr(ppbus) & LPIP_SHAKE)) 587 if (--spin == 0) 588 return 1; 589 ppb_wdtr(ppbus, txmitl[byte]); 590 while (ppb_rstr(ppbus) & 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 device_t dev = UNITODEVICE(ifp->if_dunit); 601 device_t ppbus = device_get_parent(dev); 602 int err; 603 struct mbuf *mm; 604 u_char *cp = "\0\0"; 605 u_char chksum = 0; 606 int count = 0; 607 int i, len, 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 crit_enter(); 616 617 /* Suspend (on laptops) or receive-errors might have taken us offline */ 618 ppb_wctr(ppbus, IRQENABLE); 619 620 if (ifp->if_flags & IFF_LINK0) { 621 622 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 623 lprintf("&"); 624 lp_intr(dev); 625 } 626 627 /* Alert other end to pending packet */ 628 spin = LPMAXSPIN1; 629 ppb_wdtr(ppbus, 0x08); 630 while ((ppb_rstr(ppbus) & 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, ppbus)) 644 goto nend; 645 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus)) 646 goto nend; 647 648 /* Send dummy ethernet header */ 649 for (i = 0; i < 12; i++) { 650 if (clpoutbyte(i, LPMAXSPIN1, ppbus)) 651 goto nend; 652 chksum += i; 653 } 654 655 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus)) 656 goto nend; 657 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus)) 658 goto nend; 659 chksum += 0x08 + 0x00; /* Add into checksum */ 660 661 mm = m; 662 do { 663 cp = mtod(mm, u_char *); 664 len = mm->m_len; 665 while (len--) { 666 chksum += *cp; 667 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 668 goto nend; 669 } 670 } while ((mm = mm->m_next)); 671 672 /* Send checksum */ 673 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus)) 674 goto nend; 675 676 /* Go quiescent */ 677 ppb_wdtr(ppbus, 0); 678 679 err = 0; /* No errors */ 680 681 nend: 682 if (err) { /* if we didn't timeout... */ 683 ifp->if_oerrors++; 684 lprintf("X"); 685 } else { 686 ifp->if_opackets++; 687 ifp->if_obytes += m->m_pkthdr.len; 688 if (ifp->if_bpf) 689 lptap(ifp, m); 690 } 691 692 m_freem(m); 693 694 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 695 lprintf("^"); 696 lp_intr(dev); 697 } 698 crit_exit(); 699 return 0; 700 } 701 702 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 703 lprintf("&"); 704 lp_intr(dev); 705 } 706 707 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus)) 708 goto end; 709 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus)) 710 goto end; 711 712 mm = m; 713 do { 714 cp = mtod(mm,u_char *); 715 len = mm->m_len; 716 while (len--) 717 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 718 goto end; 719 } while ((mm = mm->m_next)); 720 721 err = 0; /* no errors were encountered */ 722 723 end: 724 --cp; 725 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17); 726 727 if (err) { /* if we didn't timeout... */ 728 ifp->if_oerrors++; 729 lprintf("X"); 730 } else { 731 ifp->if_opackets++; 732 ifp->if_obytes += m->m_pkthdr.len; 733 if (ifp->if_bpf) 734 lptap(ifp, m); 735 } 736 737 m_freem(m); 738 739 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 740 lprintf("^"); 741 lp_intr(dev); 742 } 743 744 crit_exit(); 745 return 0; 746 } 747 748 static device_method_t lp_methods[] = { 749 /* device interface */ 750 DEVMETHOD(device_identify, lp_identify), 751 DEVMETHOD(device_probe, lp_probe), 752 DEVMETHOD(device_attach, lp_attach), 753 754 { 0, 0 } 755 }; 756 757 static driver_t lp_driver = { 758 "plip", 759 lp_methods, 760 sizeof(struct lp_data), 761 }; 762 763 DECLARE_DUMMY_MODULE(if_plip); 764 DRIVER_MODULE(if_plip, ppbus, lp_driver, lp_devclass, 0, 0); 765 766