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 1.9 2005/01/26 00:37:39 joerg 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 94 #include <machine/clock.h> 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 <bus/ppbus/ppbconf.h> 109 #include "ppbus_if.h" 110 #include <bus/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 unsigned short lp_unit; 150 151 struct ifnet sc_if; 152 u_char *sc_ifbuf; 153 int sc_iferrs; 154 155 struct resource *res_irq; 156 }; 157 158 /* Tables for the lp# interface */ 159 static u_char *txmith; 160 #define txmitl (txmith+(1*LPIPTBLSIZE)) 161 #define trecvh (txmith+(2*LPIPTBLSIZE)) 162 #define trecvl (txmith+(3*LPIPTBLSIZE)) 163 164 static 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 */ 170 static int lpinittables(void); 171 static int lpioctl(struct ifnet *, u_long, caddr_t, struct ucred *); 172 static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 173 struct rtentry *); 174 static void lp_intr(void *); 175 176 #define DEVTOSOFTC(dev) \ 177 ((struct lp_data *)device_get_softc(dev)) 178 #define UNITOSOFTC(unit) \ 179 ((struct lp_data *)devclass_get_softc(lp_devclass, (unit))) 180 #define UNITODEVICE(unit) \ 181 (devclass_get_device(lp_devclass, (unit))) 182 183 static devclass_t lp_devclass; 184 185 static void 186 lp_identify(driver_t *driver, device_t parent) 187 { 188 189 BUS_ADD_CHILD(parent, 0, "plip", 0); 190 } 191 /* 192 * lpprobe() 193 */ 194 static int 195 lp_probe(device_t dev) 196 { 197 device_t ppbus = device_get_parent(dev); 198 struct lp_data *lp; 199 int zero = 0; 200 uintptr_t irq; 201 202 lp = DEVTOSOFTC(dev); 203 bzero(lp, sizeof(struct lp_data)); 204 205 /* retrieve the ppbus irq */ 206 BUS_READ_IVAR(ppbus, dev, PPBUS_IVAR_IRQ, &irq); 207 208 /* if we haven't interrupts, the probe fails */ 209 if (irq == -1) { 210 device_printf(dev, "not an interrupt driven port, failed.\n"); 211 return (ENXIO); 212 } 213 214 /* reserve the interrupt resource, expecting irq is available to continue */ 215 lp->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &zero, irq, irq, 1, 216 RF_SHAREABLE); 217 if (lp->res_irq == 0) { 218 device_printf(dev, "cannot reserve interrupt, failed.\n"); 219 return (ENXIO); 220 } 221 222 /* 223 * lp dependent initialisation. 224 */ 225 lp->lp_unit = device_get_unit(dev); 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, "lp", 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_WAITOK); 266 267 if (!ctxmith) 268 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_WAITOK); 269 270 for (i=0; i < LPIPTBLSIZE; i++) { 271 ctxmith[i] = (i & 0xF0) >> 4; 272 ctxmitl[i] = 0x10 | (i & 0x0F); 273 ctrecvh[i] = (i & 0x78) << 1; 274 ctrecvl[i] = (i & 0x78) >> 3; 275 } 276 277 for (i=0; i < LPIPTBLSIZE; i++) { 278 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 279 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 280 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 281 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 282 } 283 284 return 0; 285 } 286 287 /* 288 * Process an ioctl request. 289 */ 290 291 static int 292 lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 293 { 294 device_t dev = UNITODEVICE(ifp->if_dunit); 295 device_t ppbus = device_get_parent(dev); 296 struct lp_data *sc = DEVTOSOFTC(dev); 297 struct ifaddr *ifa = (struct ifaddr *)data; 298 struct ifreq *ifr = (struct ifreq *)data; 299 u_char *ptr; 300 void *ih; 301 int error; 302 303 switch (cmd) { 304 305 case SIOCSIFDSTADDR: 306 case SIOCAIFADDR: 307 case SIOCSIFADDR: 308 if (ifa->ifa_addr->sa_family != AF_INET) 309 return EAFNOSUPPORT; 310 311 ifp->if_flags |= IFF_UP; 312 /* FALLTHROUGH */ 313 case SIOCSIFFLAGS: 314 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 315 316 ppb_wctr(ppbus, 0x00); 317 ifp->if_flags &= ~IFF_RUNNING; 318 319 /* IFF_UP is not set, try to release the bus anyway */ 320 ppb_release_bus(ppbus, dev); 321 break; 322 } 323 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 324 325 /* XXX 326 * Should the request be interruptible? 327 */ 328 if ((error = ppb_request_bus(ppbus, dev, PPB_WAIT|PPB_INTR))) 329 return (error); 330 331 /* Now IFF_UP means that we own the bus */ 332 333 ppb_set_mode(ppbus, PPB_COMPATIBLE); 334 335 if (lpinittables()) { 336 ppb_release_bus(ppbus, dev); 337 return ENOBUFS; 338 } 339 340 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 341 M_DEVBUF, M_WAITOK); 342 if (!sc->sc_ifbuf) { 343 ppb_release_bus(ppbus, dev); 344 return ENOBUFS; 345 } 346 347 /* attach our interrupt handler, later detached when the bus is released */ 348 if ((error = BUS_SETUP_INTR(ppbus, dev, sc->res_irq, 349 INTR_TYPE_NET, lp_intr, dev, &ih))) { 350 ppb_release_bus(ppbus, dev); 351 return (error); 352 } 353 354 ppb_wctr(ppbus, IRQENABLE); 355 ifp->if_flags |= IFF_RUNNING; 356 } 357 break; 358 359 case SIOCSIFMTU: 360 ptr = sc->sc_ifbuf; 361 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_WAITOK); 362 if (ptr) 363 free(ptr,M_DEVBUF); 364 sc->sc_if.if_mtu = ifr->ifr_mtu; 365 break; 366 367 case SIOCGIFMTU: 368 ifr->ifr_mtu = sc->sc_if.if_mtu; 369 break; 370 371 case SIOCADDMULTI: 372 case SIOCDELMULTI: 373 if (ifr == 0) { 374 return EAFNOSUPPORT; /* XXX */ 375 } 376 switch (ifr->ifr_addr.sa_family) { 377 378 case AF_INET: 379 break; 380 381 default: 382 return EAFNOSUPPORT; 383 } 384 break; 385 386 case SIOCGIFMEDIA: 387 /* 388 * No ifmedia support at this stage; maybe use it 389 * in future for eg. protocol selection. 390 */ 391 return EINVAL; 392 393 default: 394 lprintf("LP:ioctl(0x%lx)\n", cmd); 395 return EINVAL; 396 } 397 return 0; 398 } 399 400 static __inline int 401 clpoutbyte (u_char byte, int spin, device_t ppbus) 402 { 403 ppb_wdtr(ppbus, ctxmitl[byte]); 404 while (ppb_rstr(ppbus) & CLPIP_SHAKE) 405 if (--spin == 0) { 406 return 1; 407 } 408 ppb_wdtr(ppbus, ctxmith[byte]); 409 while (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 410 if (--spin == 0) { 411 return 1; 412 } 413 return 0; 414 } 415 416 static __inline int 417 clpinbyte (int spin, device_t ppbus) 418 { 419 u_char c, cl; 420 421 while((ppb_rstr(ppbus) & CLPIP_SHAKE)) 422 if(!--spin) { 423 return -1; 424 } 425 cl = ppb_rstr(ppbus); 426 ppb_wdtr(ppbus, 0x10); 427 428 while(!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 429 if(!--spin) { 430 return -1; 431 } 432 c = ppb_rstr(ppbus); 433 ppb_wdtr(ppbus, 0x00); 434 435 return (ctrecvl[cl] | ctrecvh[c]); 436 } 437 438 static void 439 lptap(struct ifnet *ifp, struct mbuf *m) 440 { 441 /* 442 * We need to prepend the address family as a four byte field. 443 */ 444 static const uint32_t af = AF_INET; 445 446 if (ifp->if_bpf) 447 bpf_ptap(ifp->if_bpf, m, &af, sizeof(af)); 448 } 449 450 static void 451 lp_intr (void *arg) 452 { 453 device_t dev = (device_t)arg; 454 device_t ppbus = device_get_parent(dev); 455 struct lp_data *sc = DEVTOSOFTC(dev); 456 int len, s, j; 457 u_char *bp; 458 u_char c, cl; 459 struct mbuf *top; 460 461 s = splhigh(); 462 463 if (sc->sc_if.if_flags & IFF_LINK0) { 464 465 /* Ack. the request */ 466 ppb_wdtr(ppbus, 0x01); 467 468 /* Get the packet length */ 469 j = clpinbyte(LPMAXSPIN2, ppbus); 470 if (j == -1) 471 goto err; 472 len = j; 473 j = clpinbyte(LPMAXSPIN2, ppbus); 474 if (j == -1) 475 goto err; 476 len = len + (j << 8); 477 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 478 goto err; 479 480 bp = sc->sc_ifbuf; 481 482 while (len--) { 483 j = clpinbyte(LPMAXSPIN2, ppbus); 484 if (j == -1) { 485 goto err; 486 } 487 *bp++ = j; 488 } 489 /* Get and ignore checksum */ 490 j = clpinbyte(LPMAXSPIN2, ppbus); 491 if (j == -1) { 492 goto err; 493 } 494 495 len = bp - sc->sc_ifbuf; 496 if (len <= CLPIPHDRLEN) 497 goto err; 498 499 sc->sc_iferrs = 0; 500 501 len -= CLPIPHDRLEN; 502 sc->sc_if.if_ipackets++; 503 sc->sc_if.if_ibytes += len; 504 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 505 if (top) { 506 if (sc->sc_if.if_bpf) 507 lptap(&sc->sc_if, top); 508 netisr_queue(NETISR_IP, top); 509 } 510 goto done; 511 } 512 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) { 513 len = sc->sc_if.if_mtu + LPIPHDRLEN; 514 bp = sc->sc_ifbuf; 515 while (len--) { 516 517 cl = ppb_rstr(ppbus); 518 ppb_wdtr(ppbus, 8); 519 520 j = LPMAXSPIN2; 521 while((ppb_rstr(ppbus) & LPIP_SHAKE)) 522 if(!--j) goto err; 523 524 c = ppb_rstr(ppbus); 525 ppb_wdtr(ppbus, 0); 526 527 *bp++= trecvh[cl] | trecvl[c]; 528 529 j = LPMAXSPIN2; 530 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) { 531 if (cl != c && 532 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) == 533 (c & 0xf8)) 534 goto end; 535 if (!--j) goto err; 536 } 537 } 538 539 end: 540 len = bp - sc->sc_ifbuf; 541 if (len <= LPIPHDRLEN) 542 goto err; 543 544 sc->sc_iferrs = 0; 545 546 len -= LPIPHDRLEN; 547 sc->sc_if.if_ipackets++; 548 sc->sc_if.if_ibytes += len; 549 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 550 if (top) { 551 if (sc->sc_if.if_bpf) 552 lptap(&sc->sc_if, top); 553 netisr_queue(NETISR_IP, top); 554 } 555 } 556 goto done; 557 558 err: 559 ppb_wdtr(ppbus, 0); 560 lprintf("R"); 561 sc->sc_if.if_ierrors++; 562 sc->sc_iferrs++; 563 564 /* 565 * We are not able to send receive anything for now, 566 * so stop wasting our time 567 */ 568 if (sc->sc_iferrs > LPMAXERRS) { 569 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev)); 570 ppb_wctr(ppbus, 0x00); 571 sc->sc_if.if_flags &= ~IFF_RUNNING; 572 sc->sc_iferrs=0; 573 } 574 575 done: 576 splx(s); 577 return; 578 } 579 580 static __inline int 581 lpoutbyte (u_char byte, int spin, device_t ppbus) 582 { 583 ppb_wdtr(ppbus, txmith[byte]); 584 while (!(ppb_rstr(ppbus) & LPIP_SHAKE)) 585 if (--spin == 0) 586 return 1; 587 ppb_wdtr(ppbus, txmitl[byte]); 588 while (ppb_rstr(ppbus) & LPIP_SHAKE) 589 if (--spin == 0) 590 return 1; 591 return 0; 592 } 593 594 static int 595 lpoutput (struct ifnet *ifp, struct mbuf *m, 596 struct sockaddr *dst, struct rtentry *rt) 597 { 598 device_t dev = UNITODEVICE(ifp->if_dunit); 599 device_t ppbus = device_get_parent(dev); 600 int s, err; 601 struct mbuf *mm; 602 u_char *cp = "\0\0"; 603 u_char chksum = 0; 604 int count = 0; 605 int i, len, spin; 606 607 /* We need a sensible value if we abort */ 608 cp++; 609 ifp->if_flags |= IFF_RUNNING; 610 611 err = 1; /* assume we're aborting because of an error */ 612 613 s = splhigh(); 614 615 /* Suspend (on laptops) or receive-errors might have taken us offline */ 616 ppb_wctr(ppbus, IRQENABLE); 617 618 if (ifp->if_flags & IFF_LINK0) { 619 620 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 621 lprintf("&"); 622 lp_intr(dev); 623 } 624 625 /* Alert other end to pending packet */ 626 spin = LPMAXSPIN1; 627 ppb_wdtr(ppbus, 0x08); 628 while ((ppb_rstr(ppbus) & 0x08) == 0) 629 if (--spin == 0) { 630 goto nend; 631 } 632 633 /* Calculate length of packet, then send that */ 634 635 count += 14; /* Ethernet header len */ 636 637 mm = m; 638 for (mm = m; mm; mm = mm->m_next) { 639 count += mm->m_len; 640 } 641 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus)) 642 goto nend; 643 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus)) 644 goto nend; 645 646 /* Send dummy ethernet header */ 647 for (i = 0; i < 12; i++) { 648 if (clpoutbyte(i, LPMAXSPIN1, ppbus)) 649 goto nend; 650 chksum += i; 651 } 652 653 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus)) 654 goto nend; 655 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus)) 656 goto nend; 657 chksum += 0x08 + 0x00; /* Add into checksum */ 658 659 mm = m; 660 do { 661 cp = mtod(mm, u_char *); 662 len = mm->m_len; 663 while (len--) { 664 chksum += *cp; 665 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 666 goto nend; 667 } 668 } while ((mm = mm->m_next)); 669 670 /* Send checksum */ 671 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus)) 672 goto nend; 673 674 /* Go quiescent */ 675 ppb_wdtr(ppbus, 0); 676 677 err = 0; /* No errors */ 678 679 nend: 680 if (err) { /* if we didn't timeout... */ 681 ifp->if_oerrors++; 682 lprintf("X"); 683 } else { 684 ifp->if_opackets++; 685 ifp->if_obytes += m->m_pkthdr.len; 686 if (ifp->if_bpf) 687 lptap(ifp, m); 688 } 689 690 m_freem(m); 691 692 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 693 lprintf("^"); 694 lp_intr(dev); 695 } 696 (void) splx(s); 697 return 0; 698 } 699 700 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 701 lprintf("&"); 702 lp_intr(dev); 703 } 704 705 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus)) 706 goto end; 707 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus)) 708 goto end; 709 710 mm = m; 711 do { 712 cp = mtod(mm,u_char *); 713 len = mm->m_len; 714 while (len--) 715 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 716 goto end; 717 } while ((mm = mm->m_next)); 718 719 err = 0; /* no errors were encountered */ 720 721 end: 722 --cp; 723 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17); 724 725 if (err) { /* if we didn't timeout... */ 726 ifp->if_oerrors++; 727 lprintf("X"); 728 } else { 729 ifp->if_opackets++; 730 ifp->if_obytes += m->m_pkthdr.len; 731 if (ifp->if_bpf) 732 lptap(ifp, m); 733 } 734 735 m_freem(m); 736 737 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 738 lprintf("^"); 739 lp_intr(dev); 740 } 741 742 (void) splx(s); 743 return 0; 744 } 745 746 static device_method_t lp_methods[] = { 747 /* device interface */ 748 DEVMETHOD(device_identify, lp_identify), 749 DEVMETHOD(device_probe, lp_probe), 750 DEVMETHOD(device_attach, lp_attach), 751 752 { 0, 0 } 753 }; 754 755 static driver_t lp_driver = { 756 "plip", 757 lp_methods, 758 sizeof(struct lp_data), 759 }; 760 761 DECLARE_DUMMY_MODULE(if_plip); 762 DRIVER_MODULE(if_plip, ppbus, lp_driver, lp_devclass, 0, 0); 763 764