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 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 /* 33 * Parallel port TCP/IP interfaces added. I looked at the driver from 34 * MACH but this is a complete rewrite, and btw. incompatible, and it 35 * should perform better too. I have never run the MACH driver though. 36 * 37 * This driver sends two bytes (0x08, 0x00) in front of each packet, 38 * to allow us to distinguish another format later. 39 * 40 * Now added a Linux/Crynwr compatibility mode which is enabled using 41 * IF_LINK0 - Tim Wilkinson. 42 * 43 * TODO: 44 * Make HDLC/PPP mode, use IF_LLC1 to enable. 45 * 46 * Connect the two computers using a Laplink parallel cable to use this 47 * feature: 48 * 49 * +----------------------------------------+ 50 * |A-name A-End B-End Descr. Port/Bit | 51 * +----------------------------------------+ 52 * |DATA0 2 15 Data 0/0x01 | 53 * |-ERROR 15 2 1/0x08 | 54 * +----------------------------------------+ 55 * |DATA1 3 13 Data 0/0x02 | 56 * |+SLCT 13 3 1/0x10 | 57 * +----------------------------------------+ 58 * |DATA2 4 12 Data 0/0x04 | 59 * |+PE 12 4 1/0x20 | 60 * +----------------------------------------+ 61 * |DATA3 5 10 Strobe 0/0x08 | 62 * |-ACK 10 5 1/0x40 | 63 * +----------------------------------------+ 64 * |DATA4 6 11 Data 0/0x10 | 65 * |BUSY 11 6 1/~0x80 | 66 * +----------------------------------------+ 67 * |GND 18-25 18-25 GND - | 68 * +----------------------------------------+ 69 * 70 * Expect transfer-rates up to 75 kbyte/sec. 71 * 72 * If GCC could correctly grok 73 * register int port asm("edx") 74 * the code would be cleaner 75 * 76 * Poul-Henning Kamp <phk@freebsd.org> 77 */ 78 79 /* 80 * Update for ppbus, PLIP support only - Nicolas Souchu 81 */ 82 83 #include "opt_plip.h" 84 85 #include <sys/param.h> 86 #include <sys/systm.h> 87 #include <sys/module.h> 88 #include <sys/bus.h> 89 #include <sys/mbuf.h> 90 #include <sys/socket.h> 91 #include <sys/sockio.h> 92 #include <sys/kernel.h> 93 #include <sys/malloc.h> 94 95 #include <machine/bus.h> 96 #include <machine/resource.h> 97 #include <sys/rman.h> 98 99 #include <net/if.h> 100 #include <net/if_types.h> 101 #include <net/netisr.h> 102 103 #include <netinet/in.h> 104 #include <netinet/in_var.h> 105 106 #include <net/bpf.h> 107 108 #include <dev/ppbus/ppbconf.h> 109 #include "ppbus_if.h" 110 #include <dev/ppbus/ppbio.h> 111 112 #ifndef LPMTU /* MTU for the lp# interfaces */ 113 #define LPMTU 1500 114 #endif 115 116 #ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 117 #define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 118 #endif 119 120 #ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 121 #define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 122 #endif 123 124 #ifndef LPMAXERRS /* Max errors before !RUNNING */ 125 #define LPMAXERRS 100 126 #endif 127 128 #define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 129 #define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 130 #define MLPIPHDRLEN CLPIPHDRLEN 131 132 #define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 133 #define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 134 #if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 135 #define MLPIPHDRLEN LPIPHDRLEN 136 #endif 137 138 #define LPIPTBLSIZE 256 /* Size of octet translation table */ 139 140 #define lprintf if (lptflag) printf 141 142 #ifdef PLIP_DEBUG 143 static int volatile lptflag = 1; 144 #else 145 static int volatile lptflag = 0; 146 #endif 147 148 struct lp_data { 149 struct ifnet sc_if; 150 u_char *sc_ifbuf; 151 int sc_iferrs; 152 153 struct resource *res_irq; 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 int lpinittables(void); 169 static int lpioctl(struct ifnet *, u_long, caddr_t); 170 static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 171 struct rtentry *); 172 static void lp_intr(void *); 173 174 #define DEVTOSOFTC(dev) \ 175 ((struct lp_data *)device_get_softc(dev)) 176 #define UNITOSOFTC(unit) \ 177 ((struct lp_data *)devclass_get_softc(lp_devclass, (unit))) 178 #define UNITODEVICE(unit) \ 179 (devclass_get_device(lp_devclass, (unit))) 180 181 static devclass_t lp_devclass; 182 183 static void 184 lp_identify(driver_t *driver, device_t parent) 185 { 186 device_t dev; 187 188 dev = device_find_child(parent, "plip", 0); 189 if (!dev) 190 BUS_ADD_CHILD(parent, 0, "plip", -1); 191 } 192 /* 193 * lpprobe() 194 */ 195 static int 196 lp_probe(device_t dev) 197 { 198 device_t ppbus = device_get_parent(dev); 199 struct lp_data *lp; 200 int zero = 0; 201 uintptr_t irq; 202 203 lp = DEVTOSOFTC(dev); 204 bzero(lp, sizeof(struct lp_data)); 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 */ 226 227 device_set_desc(dev, "PLIP network interface"); 228 229 return (0); 230 } 231 232 static int 233 lp_attach (device_t dev) 234 { 235 struct lp_data *lp = DEVTOSOFTC(dev); 236 struct ifnet *ifp = &lp->sc_if; 237 238 ifp->if_softc = lp; 239 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 240 ifp->if_mtu = LPMTU; 241 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 242 ifp->if_ioctl = lpioctl; 243 ifp->if_output = lpoutput; 244 ifp->if_type = IFT_PARA; 245 ifp->if_hdrlen = 0; 246 ifp->if_addrlen = 0; 247 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 248 if_attach(ifp); 249 250 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t)); 251 252 return (0); 253 } 254 /* 255 * Build the translation tables for the LPIP (BSD unix) protocol. 256 * We don't want to calculate these nasties in our tight loop, so we 257 * precalculate them when we initialize. 258 */ 259 static int 260 lpinittables (void) 261 { 262 int i; 263 264 if (!txmith) 265 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 266 267 if (!txmith) 268 return 1; 269 270 if (!ctxmith) 271 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 272 273 if (!ctxmith) 274 return 1; 275 276 for (i=0; i < LPIPTBLSIZE; i++) { 277 ctxmith[i] = (i & 0xF0) >> 4; 278 ctxmitl[i] = 0x10 | (i & 0x0F); 279 ctrecvh[i] = (i & 0x78) << 1; 280 ctrecvl[i] = (i & 0x78) >> 3; 281 } 282 283 for (i=0; i < LPIPTBLSIZE; i++) { 284 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 285 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 286 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 287 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 288 } 289 290 return 0; 291 } 292 293 /* 294 * Process an ioctl request. 295 */ 296 297 static int 298 lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 299 { 300 device_t dev = UNITODEVICE(ifp->if_dunit); 301 device_t ppbus = device_get_parent(dev); 302 struct lp_data *sc = DEVTOSOFTC(dev); 303 struct ifaddr *ifa = (struct ifaddr *)data; 304 struct ifreq *ifr = (struct ifreq *)data; 305 u_char *ptr; 306 void *ih; 307 int error; 308 309 switch (cmd) { 310 311 case SIOCSIFDSTADDR: 312 case SIOCAIFADDR: 313 case SIOCSIFADDR: 314 if (ifa->ifa_addr->sa_family != AF_INET) 315 return EAFNOSUPPORT; 316 317 ifp->if_flags |= IFF_UP; 318 /* FALLTHROUGH */ 319 case SIOCSIFFLAGS: 320 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 321 322 ppb_wctr(ppbus, 0x00); 323 ifp->if_flags &= ~IFF_RUNNING; 324 325 /* IFF_UP is not set, try to release the bus anyway */ 326 ppb_release_bus(ppbus, dev); 327 break; 328 } 329 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 330 331 /* XXX 332 * Should the request be interruptible? 333 */ 334 if ((error = ppb_request_bus(ppbus, dev, PPB_WAIT|PPB_INTR))) 335 return (error); 336 337 /* Now IFF_UP means that we own the bus */ 338 339 ppb_set_mode(ppbus, PPB_COMPATIBLE); 340 341 if (lpinittables()) { 342 ppb_release_bus(ppbus, dev); 343 return ENOBUFS; 344 } 345 346 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 347 M_DEVBUF, M_WAITOK); 348 if (!sc->sc_ifbuf) { 349 ppb_release_bus(ppbus, dev); 350 return ENOBUFS; 351 } 352 353 /* attach our interrupt handler, later detached when the bus is released */ 354 if ((error = BUS_SETUP_INTR(ppbus, dev, sc->res_irq, 355 INTR_TYPE_NET, lp_intr, dev, &ih))) { 356 ppb_release_bus(ppbus, dev); 357 return (error); 358 } 359 360 ppb_wctr(ppbus, IRQENABLE); 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 case SIOCGIFMEDIA: 397 /* 398 * No ifmedia support at this stage; maybe use it 399 * in future for eg. protocol selection. 400 */ 401 return EINVAL; 402 403 default: 404 lprintf("LP:ioctl(0x%lx)\n", cmd); 405 return EINVAL; 406 } 407 return 0; 408 } 409 410 static __inline int 411 clpoutbyte (u_char byte, int spin, device_t ppbus) 412 { 413 ppb_wdtr(ppbus, ctxmitl[byte]); 414 while (ppb_rstr(ppbus) & CLPIP_SHAKE) 415 if (--spin == 0) { 416 return 1; 417 } 418 ppb_wdtr(ppbus, ctxmith[byte]); 419 while (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 420 if (--spin == 0) { 421 return 1; 422 } 423 return 0; 424 } 425 426 static __inline int 427 clpinbyte (int spin, device_t ppbus) 428 { 429 u_char c, cl; 430 431 while((ppb_rstr(ppbus) & CLPIP_SHAKE)) 432 if(!--spin) { 433 return -1; 434 } 435 cl = ppb_rstr(ppbus); 436 ppb_wdtr(ppbus, 0x10); 437 438 while(!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 439 if(!--spin) { 440 return -1; 441 } 442 c = ppb_rstr(ppbus); 443 ppb_wdtr(ppbus, 0x00); 444 445 return (ctrecvl[cl] | ctrecvh[c]); 446 } 447 448 static void 449 lptap(struct ifnet *ifp, struct mbuf *m) 450 { 451 u_int32_t af = AF_INET; 452 BPF_MTAP2(ifp, &af, sizeof(af), m); 453 } 454 455 static void 456 lp_intr (void *arg) 457 { 458 device_t dev = (device_t)arg; 459 device_t ppbus = device_get_parent(dev); 460 struct lp_data *sc = DEVTOSOFTC(dev); 461 int len, s, j; 462 u_char *bp; 463 u_char c, cl; 464 struct mbuf *top; 465 466 s = splhigh(); 467 468 if (sc->sc_if.if_flags & IFF_LINK0) { 469 470 /* Ack. the request */ 471 ppb_wdtr(ppbus, 0x01); 472 473 /* Get the packet length */ 474 j = clpinbyte(LPMAXSPIN2, ppbus); 475 if (j == -1) 476 goto err; 477 len = j; 478 j = clpinbyte(LPMAXSPIN2, ppbus); 479 if (j == -1) 480 goto err; 481 len = len + (j << 8); 482 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 483 goto err; 484 485 bp = sc->sc_ifbuf; 486 487 while (len--) { 488 j = clpinbyte(LPMAXSPIN2, ppbus); 489 if (j == -1) { 490 goto err; 491 } 492 *bp++ = j; 493 } 494 /* Get and ignore checksum */ 495 j = clpinbyte(LPMAXSPIN2, ppbus); 496 if (j == -1) { 497 goto err; 498 } 499 500 len = bp - sc->sc_ifbuf; 501 if (len <= CLPIPHDRLEN) 502 goto err; 503 504 sc->sc_iferrs = 0; 505 506 len -= CLPIPHDRLEN; 507 sc->sc_if.if_ipackets++; 508 sc->sc_if.if_ibytes += len; 509 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 510 if (top) { 511 if (sc->sc_if.if_bpf) 512 lptap(&sc->sc_if, top); 513 netisr_queue(NETISR_IP, top); 514 } 515 goto done; 516 } 517 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) { 518 len = sc->sc_if.if_mtu + LPIPHDRLEN; 519 bp = sc->sc_ifbuf; 520 while (len--) { 521 522 cl = ppb_rstr(ppbus); 523 ppb_wdtr(ppbus, 8); 524 525 j = LPMAXSPIN2; 526 while((ppb_rstr(ppbus) & LPIP_SHAKE)) 527 if(!--j) goto err; 528 529 c = ppb_rstr(ppbus); 530 ppb_wdtr(ppbus, 0); 531 532 *bp++= trecvh[cl] | trecvl[c]; 533 534 j = LPMAXSPIN2; 535 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) { 536 if (cl != c && 537 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) == 538 (c & 0xf8)) 539 goto end; 540 if (!--j) goto err; 541 } 542 } 543 544 end: 545 len = bp - sc->sc_ifbuf; 546 if (len <= LPIPHDRLEN) 547 goto err; 548 549 sc->sc_iferrs = 0; 550 551 len -= LPIPHDRLEN; 552 sc->sc_if.if_ipackets++; 553 sc->sc_if.if_ibytes += len; 554 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 555 if (top) { 556 if (sc->sc_if.if_bpf) 557 lptap(&sc->sc_if, top); 558 netisr_queue(NETISR_IP, top); 559 } 560 } 561 goto done; 562 563 err: 564 ppb_wdtr(ppbus, 0); 565 lprintf("R"); 566 sc->sc_if.if_ierrors++; 567 sc->sc_iferrs++; 568 569 /* 570 * We are not able to send receive anything for now, 571 * so stop wasting our time 572 */ 573 if (sc->sc_iferrs > LPMAXERRS) { 574 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev)); 575 ppb_wctr(ppbus, 0x00); 576 sc->sc_if.if_flags &= ~IFF_RUNNING; 577 sc->sc_iferrs=0; 578 } 579 580 done: 581 splx(s); 582 return; 583 } 584 585 static __inline int 586 lpoutbyte (u_char byte, int spin, device_t ppbus) 587 { 588 ppb_wdtr(ppbus, txmith[byte]); 589 while (!(ppb_rstr(ppbus) & LPIP_SHAKE)) 590 if (--spin == 0) 591 return 1; 592 ppb_wdtr(ppbus, txmitl[byte]); 593 while (ppb_rstr(ppbus) & LPIP_SHAKE) 594 if (--spin == 0) 595 return 1; 596 return 0; 597 } 598 599 static int 600 lpoutput (struct ifnet *ifp, struct mbuf *m, 601 struct sockaddr *dst, struct rtentry *rt) 602 { 603 device_t dev = UNITODEVICE(ifp->if_dunit); 604 device_t ppbus = device_get_parent(dev); 605 int s, err; 606 struct mbuf *mm; 607 u_char *cp = "\0\0"; 608 u_char chksum = 0; 609 int count = 0; 610 int i, len, spin; 611 612 /* We need a sensible value if we abort */ 613 cp++; 614 ifp->if_flags |= IFF_RUNNING; 615 616 err = 1; /* assume we're aborting because of an error */ 617 618 s = splhigh(); 619 620 /* Suspend (on laptops) or receive-errors might have taken us offline */ 621 ppb_wctr(ppbus, IRQENABLE); 622 623 if (ifp->if_flags & IFF_LINK0) { 624 625 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 626 lprintf("&"); 627 lp_intr(dev); 628 } 629 630 /* Alert other end to pending packet */ 631 spin = LPMAXSPIN1; 632 ppb_wdtr(ppbus, 0x08); 633 while ((ppb_rstr(ppbus) & 0x08) == 0) 634 if (--spin == 0) { 635 goto nend; 636 } 637 638 /* Calculate length of packet, then send that */ 639 640 count += 14; /* Ethernet header len */ 641 642 mm = m; 643 for (mm = m; mm; mm = mm->m_next) { 644 count += mm->m_len; 645 } 646 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus)) 647 goto nend; 648 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus)) 649 goto nend; 650 651 /* Send dummy ethernet header */ 652 for (i = 0; i < 12; i++) { 653 if (clpoutbyte(i, LPMAXSPIN1, ppbus)) 654 goto nend; 655 chksum += i; 656 } 657 658 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus)) 659 goto nend; 660 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus)) 661 goto nend; 662 chksum += 0x08 + 0x00; /* Add into checksum */ 663 664 mm = m; 665 do { 666 cp = mtod(mm, u_char *); 667 len = mm->m_len; 668 while (len--) { 669 chksum += *cp; 670 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 671 goto nend; 672 } 673 } while ((mm = mm->m_next)); 674 675 /* Send checksum */ 676 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus)) 677 goto nend; 678 679 /* Go quiescent */ 680 ppb_wdtr(ppbus, 0); 681 682 err = 0; /* No errors */ 683 684 nend: 685 if (err) { /* if we didn't timeout... */ 686 ifp->if_oerrors++; 687 lprintf("X"); 688 } else { 689 ifp->if_opackets++; 690 ifp->if_obytes += m->m_pkthdr.len; 691 if (ifp->if_bpf) 692 lptap(ifp, m); 693 } 694 695 m_freem(m); 696 697 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 698 lprintf("^"); 699 lp_intr(dev); 700 } 701 (void) splx(s); 702 return 0; 703 } 704 705 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 706 lprintf("&"); 707 lp_intr(dev); 708 } 709 710 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus)) 711 goto end; 712 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus)) 713 goto end; 714 715 mm = m; 716 do { 717 cp = mtod(mm,u_char *); 718 len = mm->m_len; 719 while (len--) 720 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 721 goto end; 722 } while ((mm = mm->m_next)); 723 724 err = 0; /* no errors were encountered */ 725 726 end: 727 --cp; 728 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17); 729 730 if (err) { /* if we didn't timeout... */ 731 ifp->if_oerrors++; 732 lprintf("X"); 733 } else { 734 ifp->if_opackets++; 735 ifp->if_obytes += m->m_pkthdr.len; 736 if (ifp->if_bpf) 737 lptap(ifp, m); 738 } 739 740 m_freem(m); 741 742 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 743 lprintf("^"); 744 lp_intr(dev); 745 } 746 747 (void) splx(s); 748 return 0; 749 } 750 751 static device_method_t lp_methods[] = { 752 /* device interface */ 753 DEVMETHOD(device_identify, lp_identify), 754 DEVMETHOD(device_probe, lp_probe), 755 DEVMETHOD(device_attach, lp_attach), 756 757 { 0, 0 } 758 }; 759 760 static driver_t lp_driver = { 761 "plip", 762 lp_methods, 763 sizeof(struct lp_data), 764 }; 765 766 DRIVER_MODULE(plip, ppbus, lp_driver, lp_devclass, 0, 0); 767