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_ifp; 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 UNITODEVICE(unit) \ 177 (devclass_get_device(lp_devclass, (unit))) 178 179 static devclass_t lp_devclass; 180 181 static void 182 lp_identify(driver_t *driver, device_t parent) 183 { 184 device_t dev; 185 186 dev = device_find_child(parent, "plip", -1); 187 if (!dev) 188 BUS_ADD_CHILD(parent, 0, "plip", -1); 189 } 190 /* 191 * lpprobe() 192 */ 193 static int 194 lp_probe(device_t dev) 195 { 196 device_t ppbus = device_get_parent(dev); 197 struct lp_data *lp; 198 int zero = 0; 199 uintptr_t irq; 200 201 lp = DEVTOSOFTC(dev); 202 203 /* retrieve the ppbus irq */ 204 BUS_READ_IVAR(ppbus, dev, PPBUS_IVAR_IRQ, &irq); 205 206 /* if we haven't interrupts, the probe fails */ 207 if (irq == -1) { 208 device_printf(dev, "not an interrupt driven port, failed.\n"); 209 return (ENXIO); 210 } 211 212 /* reserve the interrupt resource, expecting irq is available to continue */ 213 lp->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &zero, irq, irq, 1, 214 RF_SHAREABLE); 215 if (lp->res_irq == 0) { 216 device_printf(dev, "cannot reserve interrupt, failed.\n"); 217 return (ENXIO); 218 } 219 220 /* 221 * lp dependent initialisation. 222 */ 223 224 device_set_desc(dev, "PLIP network interface"); 225 226 return (0); 227 } 228 229 static int 230 lp_attach (device_t dev) 231 { 232 struct lp_data *lp = DEVTOSOFTC(dev); 233 struct ifnet *ifp; 234 235 ifp = lp->sc_ifp = if_alloc(IFT_PARA); 236 if (ifp == NULL) { 237 return (ENOSPC); 238 } 239 240 ifp->if_softc = lp; 241 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 242 ifp->if_mtu = LPMTU; 243 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST | 244 IFF_NEEDSGIANT; 245 ifp->if_ioctl = lpioctl; 246 ifp->if_output = lpoutput; 247 ifp->if_hdrlen = 0; 248 ifp->if_addrlen = 0; 249 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 250 if_attach(ifp); 251 252 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t)); 253 254 return (0); 255 } 256 /* 257 * Build the translation tables for the LPIP (BSD unix) protocol. 258 * We don't want to calculate these nasties in our tight loop, so we 259 * precalculate them when we initialize. 260 */ 261 static int 262 lpinittables (void) 263 { 264 int i; 265 266 if (!txmith) 267 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 268 269 if (!txmith) 270 return 1; 271 272 if (!ctxmith) 273 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 274 275 if (!ctxmith) 276 return 1; 277 278 for (i=0; i < LPIPTBLSIZE; i++) { 279 ctxmith[i] = (i & 0xF0) >> 4; 280 ctxmitl[i] = 0x10 | (i & 0x0F); 281 ctrecvh[i] = (i & 0x78) << 1; 282 ctrecvl[i] = (i & 0x78) >> 3; 283 } 284 285 for (i=0; i < LPIPTBLSIZE; i++) { 286 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 287 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 288 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 289 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 290 } 291 292 return 0; 293 } 294 295 /* 296 * Process an ioctl request. 297 */ 298 299 static int 300 lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 301 { 302 device_t dev = UNITODEVICE(ifp->if_dunit); 303 device_t ppbus = device_get_parent(dev); 304 struct lp_data *sc = DEVTOSOFTC(dev); 305 struct ifaddr *ifa = (struct ifaddr *)data; 306 struct ifreq *ifr = (struct ifreq *)data; 307 u_char *ptr; 308 void *ih; 309 int error; 310 311 switch (cmd) { 312 313 case SIOCSIFDSTADDR: 314 case SIOCAIFADDR: 315 case SIOCSIFADDR: 316 if (ifa->ifa_addr->sa_family != AF_INET) 317 return EAFNOSUPPORT; 318 319 ifp->if_flags |= IFF_UP; 320 /* FALLTHROUGH */ 321 case SIOCSIFFLAGS: 322 if ((!(ifp->if_flags & IFF_UP)) && 323 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 324 325 ppb_wctr(ppbus, 0x00); 326 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 327 328 /* IFF_UP is not set, try to release the bus anyway */ 329 ppb_release_bus(ppbus, dev); 330 break; 331 } 332 if (((ifp->if_flags & IFF_UP)) && 333 (!(ifp->if_drv_flags & IFF_DRV_RUNNING))) { 334 335 /* XXX 336 * Should the request be interruptible? 337 */ 338 if ((error = ppb_request_bus(ppbus, dev, PPB_WAIT|PPB_INTR))) 339 return (error); 340 341 /* Now IFF_UP means that we own the bus */ 342 343 ppb_set_mode(ppbus, PPB_COMPATIBLE); 344 345 if (lpinittables()) { 346 ppb_release_bus(ppbus, dev); 347 return ENOBUFS; 348 } 349 350 sc->sc_ifbuf = malloc(sc->sc_ifp->if_mtu + MLPIPHDRLEN, 351 M_DEVBUF, M_WAITOK); 352 if (!sc->sc_ifbuf) { 353 ppb_release_bus(ppbus, dev); 354 return ENOBUFS; 355 } 356 357 /* attach our interrupt handler, later detached when the bus is released */ 358 if ((error = bus_setup_intr(dev, sc->res_irq, 359 INTR_TYPE_NET, NULL, lp_intr, dev, &ih))) { 360 ppb_release_bus(ppbus, dev); 361 return (error); 362 } 363 364 ppb_wctr(ppbus, IRQENABLE); 365 ifp->if_drv_flags |= IFF_DRV_RUNNING; 366 } 367 break; 368 369 case SIOCSIFMTU: 370 ptr = sc->sc_ifbuf; 371 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 372 if (!sc->sc_ifbuf) { 373 sc->sc_ifbuf = ptr; 374 return ENOBUFS; 375 } 376 if (ptr) 377 free(ptr,M_DEVBUF); 378 sc->sc_ifp->if_mtu = ifr->ifr_mtu; 379 break; 380 381 case SIOCGIFMTU: 382 ifr->ifr_mtu = sc->sc_ifp->if_mtu; 383 break; 384 385 case SIOCADDMULTI: 386 case SIOCDELMULTI: 387 if (ifr == 0) { 388 return EAFNOSUPPORT; /* XXX */ 389 } 390 switch (ifr->ifr_addr.sa_family) { 391 392 case AF_INET: 393 break; 394 395 default: 396 return EAFNOSUPPORT; 397 } 398 break; 399 400 case SIOCGIFMEDIA: 401 /* 402 * No ifmedia support at this stage; maybe use it 403 * in future for eg. protocol selection. 404 */ 405 return EINVAL; 406 407 default: 408 lprintf("LP:ioctl(0x%lx)\n", cmd); 409 return EINVAL; 410 } 411 return 0; 412 } 413 414 static __inline int 415 clpoutbyte (u_char byte, int spin, device_t ppbus) 416 { 417 ppb_wdtr(ppbus, ctxmitl[byte]); 418 while (ppb_rstr(ppbus) & CLPIP_SHAKE) 419 if (--spin == 0) { 420 return 1; 421 } 422 ppb_wdtr(ppbus, ctxmith[byte]); 423 while (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 424 if (--spin == 0) { 425 return 1; 426 } 427 return 0; 428 } 429 430 static __inline int 431 clpinbyte (int spin, device_t ppbus) 432 { 433 u_char c, cl; 434 435 while((ppb_rstr(ppbus) & CLPIP_SHAKE)) 436 if(!--spin) { 437 return -1; 438 } 439 cl = ppb_rstr(ppbus); 440 ppb_wdtr(ppbus, 0x10); 441 442 while(!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 443 if(!--spin) { 444 return -1; 445 } 446 c = ppb_rstr(ppbus); 447 ppb_wdtr(ppbus, 0x00); 448 449 return (ctrecvl[cl] | ctrecvh[c]); 450 } 451 452 static void 453 lptap(struct ifnet *ifp, struct mbuf *m) 454 { 455 u_int32_t af = AF_INET; 456 bpf_mtap2(ifp->if_bpf, &af, sizeof(af), m); 457 } 458 459 static void 460 lp_intr (void *arg) 461 { 462 device_t dev = (device_t)arg; 463 device_t ppbus = device_get_parent(dev); 464 struct lp_data *sc = DEVTOSOFTC(dev); 465 int len, s, j; 466 u_char *bp; 467 u_char c, cl; 468 struct mbuf *top; 469 470 s = splhigh(); 471 472 if (sc->sc_ifp->if_flags & IFF_LINK0) { 473 474 /* Ack. the request */ 475 ppb_wdtr(ppbus, 0x01); 476 477 /* Get the packet length */ 478 j = clpinbyte(LPMAXSPIN2, ppbus); 479 if (j == -1) 480 goto err; 481 len = j; 482 j = clpinbyte(LPMAXSPIN2, ppbus); 483 if (j == -1) 484 goto err; 485 len = len + (j << 8); 486 if (len > sc->sc_ifp->if_mtu + MLPIPHDRLEN) 487 goto err; 488 489 bp = sc->sc_ifbuf; 490 491 while (len--) { 492 j = clpinbyte(LPMAXSPIN2, ppbus); 493 if (j == -1) { 494 goto err; 495 } 496 *bp++ = j; 497 } 498 /* Get and ignore checksum */ 499 j = clpinbyte(LPMAXSPIN2, ppbus); 500 if (j == -1) { 501 goto err; 502 } 503 504 len = bp - sc->sc_ifbuf; 505 if (len <= CLPIPHDRLEN) 506 goto err; 507 508 sc->sc_iferrs = 0; 509 510 len -= CLPIPHDRLEN; 511 sc->sc_ifp->if_ipackets++; 512 sc->sc_ifp->if_ibytes += len; 513 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, sc->sc_ifp, 0); 514 if (top) { 515 if (bpf_peers_present(sc->sc_ifp->if_bpf)) 516 lptap(sc->sc_ifp, top); 517 netisr_queue(NETISR_IP, top); /* mbuf is free'd on failure. */ 518 } 519 goto done; 520 } 521 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) { 522 len = sc->sc_ifp->if_mtu + LPIPHDRLEN; 523 bp = sc->sc_ifbuf; 524 while (len--) { 525 526 cl = ppb_rstr(ppbus); 527 ppb_wdtr(ppbus, 8); 528 529 j = LPMAXSPIN2; 530 while((ppb_rstr(ppbus) & LPIP_SHAKE)) 531 if(!--j) goto err; 532 533 c = ppb_rstr(ppbus); 534 ppb_wdtr(ppbus, 0); 535 536 *bp++= trecvh[cl] | trecvl[c]; 537 538 j = LPMAXSPIN2; 539 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) { 540 if (cl != c && 541 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) == 542 (c & 0xf8)) 543 goto end; 544 if (!--j) goto err; 545 } 546 } 547 548 end: 549 len = bp - sc->sc_ifbuf; 550 if (len <= LPIPHDRLEN) 551 goto err; 552 553 sc->sc_iferrs = 0; 554 555 len -= LPIPHDRLEN; 556 sc->sc_ifp->if_ipackets++; 557 sc->sc_ifp->if_ibytes += len; 558 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, sc->sc_ifp, 0); 559 if (top) { 560 if (bpf_peers_present(sc->sc_ifp->if_bpf)) 561 lptap(sc->sc_ifp, top); 562 netisr_queue(NETISR_IP, top); /* mbuf is free'd on failure. */ 563 } 564 } 565 goto done; 566 567 err: 568 ppb_wdtr(ppbus, 0); 569 lprintf("R"); 570 sc->sc_ifp->if_ierrors++; 571 sc->sc_iferrs++; 572 573 /* 574 * We are not able to send receive anything for now, 575 * so stop wasting our time 576 */ 577 if (sc->sc_iferrs > LPMAXERRS) { 578 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev)); 579 ppb_wctr(ppbus, 0x00); 580 sc->sc_ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 581 sc->sc_iferrs=0; 582 } 583 584 done: 585 splx(s); 586 return; 587 } 588 589 static __inline int 590 lpoutbyte (u_char byte, int spin, device_t ppbus) 591 { 592 ppb_wdtr(ppbus, txmith[byte]); 593 while (!(ppb_rstr(ppbus) & LPIP_SHAKE)) 594 if (--spin == 0) 595 return 1; 596 ppb_wdtr(ppbus, txmitl[byte]); 597 while (ppb_rstr(ppbus) & LPIP_SHAKE) 598 if (--spin == 0) 599 return 1; 600 return 0; 601 } 602 603 static int 604 lpoutput (struct ifnet *ifp, struct mbuf *m, 605 struct sockaddr *dst, struct rtentry *rt) 606 { 607 device_t dev = UNITODEVICE(ifp->if_dunit); 608 device_t ppbus = device_get_parent(dev); 609 int s, err; 610 struct mbuf *mm; 611 u_char *cp = "\0\0"; 612 u_char chksum = 0; 613 int count = 0; 614 int i, len, spin; 615 616 /* We need a sensible value if we abort */ 617 cp++; 618 ifp->if_drv_flags |= IFF_DRV_RUNNING; 619 620 err = 1; /* assume we're aborting because of an error */ 621 622 s = splhigh(); 623 624 /* Suspend (on laptops) or receive-errors might have taken us offline */ 625 ppb_wctr(ppbus, IRQENABLE); 626 627 if (ifp->if_flags & IFF_LINK0) { 628 629 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 630 lprintf("&"); 631 lp_intr(dev); 632 } 633 634 /* Alert other end to pending packet */ 635 spin = LPMAXSPIN1; 636 ppb_wdtr(ppbus, 0x08); 637 while ((ppb_rstr(ppbus) & 0x08) == 0) 638 if (--spin == 0) { 639 goto nend; 640 } 641 642 /* Calculate length of packet, then send that */ 643 644 count += 14; /* Ethernet header len */ 645 646 mm = m; 647 for (mm = m; mm; mm = mm->m_next) { 648 count += mm->m_len; 649 } 650 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus)) 651 goto nend; 652 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus)) 653 goto nend; 654 655 /* Send dummy ethernet header */ 656 for (i = 0; i < 12; i++) { 657 if (clpoutbyte(i, LPMAXSPIN1, ppbus)) 658 goto nend; 659 chksum += i; 660 } 661 662 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus)) 663 goto nend; 664 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus)) 665 goto nend; 666 chksum += 0x08 + 0x00; /* Add into checksum */ 667 668 mm = m; 669 do { 670 cp = mtod(mm, u_char *); 671 len = mm->m_len; 672 while (len--) { 673 chksum += *cp; 674 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 675 goto nend; 676 } 677 } while ((mm = mm->m_next)); 678 679 /* Send checksum */ 680 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus)) 681 goto nend; 682 683 /* Go quiescent */ 684 ppb_wdtr(ppbus, 0); 685 686 err = 0; /* No errors */ 687 688 nend: 689 if (err) { /* if we didn't timeout... */ 690 ifp->if_oerrors++; 691 lprintf("X"); 692 } else { 693 ifp->if_opackets++; 694 ifp->if_obytes += m->m_pkthdr.len; 695 if (bpf_peers_present(ifp->if_bpf)) 696 lptap(ifp, m); 697 } 698 699 m_freem(m); 700 701 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 702 lprintf("^"); 703 lp_intr(dev); 704 } 705 (void) splx(s); 706 return 0; 707 } 708 709 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 710 lprintf("&"); 711 lp_intr(dev); 712 } 713 714 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus)) 715 goto end; 716 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus)) 717 goto end; 718 719 mm = m; 720 do { 721 cp = mtod(mm,u_char *); 722 len = mm->m_len; 723 while (len--) 724 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 725 goto end; 726 } while ((mm = mm->m_next)); 727 728 err = 0; /* no errors were encountered */ 729 730 end: 731 --cp; 732 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17); 733 734 if (err) { /* if we didn't timeout... */ 735 ifp->if_oerrors++; 736 lprintf("X"); 737 } else { 738 ifp->if_opackets++; 739 ifp->if_obytes += m->m_pkthdr.len; 740 if (bpf_peers_present(ifp->if_bpf)) 741 lptap(ifp, m); 742 } 743 744 m_freem(m); 745 746 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 747 lprintf("^"); 748 lp_intr(dev); 749 } 750 751 (void) splx(s); 752 return 0; 753 } 754 755 static device_method_t lp_methods[] = { 756 /* device interface */ 757 DEVMETHOD(device_identify, lp_identify), 758 DEVMETHOD(device_probe, lp_probe), 759 DEVMETHOD(device_attach, lp_attach), 760 761 { 0, 0 } 762 }; 763 764 static driver_t lp_driver = { 765 "plip", 766 lp_methods, 767 sizeof(struct lp_data), 768 }; 769 770 DRIVER_MODULE(plip, ppbus, lp_driver, lp_devclass, 0, 0); 771 MODULE_DEPEND(plip, ppbus, 1, 1, 1); 772