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); 204 205 /* 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 */ 225 226 device_set_desc(dev, "PLIP network interface"); 227 228 return (0); 229 } 230 231 static int 232 lp_attach (device_t dev) 233 { 234 struct lp_data *lp = DEVTOSOFTC(dev); 235 struct ifnet *ifp = &lp->sc_if; 236 237 ifp->if_softc = lp; 238 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 239 ifp->if_mtu = LPMTU; 240 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 241 ifp->if_ioctl = lpioctl; 242 ifp->if_output = lpoutput; 243 ifp->if_type = IFT_PARA; 244 ifp->if_hdrlen = 0; 245 ifp->if_addrlen = 0; 246 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 247 if_attach(ifp); 248 249 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t)); 250 251 return (0); 252 } 253 /* 254 * Build the translation tables for the LPIP (BSD unix) protocol. 255 * We don't want to calculate these nasties in our tight loop, so we 256 * precalculate them when we initialize. 257 */ 258 static int 259 lpinittables (void) 260 { 261 int i; 262 263 if (!txmith) 264 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 265 266 if (!txmith) 267 return 1; 268 269 if (!ctxmith) 270 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 271 272 if (!ctxmith) 273 return 1; 274 275 for (i=0; i < LPIPTBLSIZE; i++) { 276 ctxmith[i] = (i & 0xF0) >> 4; 277 ctxmitl[i] = 0x10 | (i & 0x0F); 278 ctrecvh[i] = (i & 0x78) << 1; 279 ctrecvl[i] = (i & 0x78) >> 3; 280 } 281 282 for (i=0; i < LPIPTBLSIZE; i++) { 283 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 284 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 285 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 286 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 287 } 288 289 return 0; 290 } 291 292 /* 293 * Process an ioctl request. 294 */ 295 296 static int 297 lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 298 { 299 device_t dev = UNITODEVICE(ifp->if_dunit); 300 device_t ppbus = device_get_parent(dev); 301 struct lp_data *sc = DEVTOSOFTC(dev); 302 struct ifaddr *ifa = (struct ifaddr *)data; 303 struct ifreq *ifr = (struct ifreq *)data; 304 u_char *ptr; 305 void *ih; 306 int error; 307 308 switch (cmd) { 309 310 case SIOCSIFDSTADDR: 311 case SIOCAIFADDR: 312 case SIOCSIFADDR: 313 if (ifa->ifa_addr->sa_family != AF_INET) 314 return EAFNOSUPPORT; 315 316 ifp->if_flags |= IFF_UP; 317 /* FALLTHROUGH */ 318 case SIOCSIFFLAGS: 319 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 320 321 ppb_wctr(ppbus, 0x00); 322 ifp->if_flags &= ~IFF_RUNNING; 323 324 /* IFF_UP is not set, try to release the bus anyway */ 325 ppb_release_bus(ppbus, dev); 326 break; 327 } 328 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 329 330 /* XXX 331 * Should the request be interruptible? 332 */ 333 if ((error = ppb_request_bus(ppbus, dev, PPB_WAIT|PPB_INTR))) 334 return (error); 335 336 /* Now IFF_UP means that we own the bus */ 337 338 ppb_set_mode(ppbus, PPB_COMPATIBLE); 339 340 if (lpinittables()) { 341 ppb_release_bus(ppbus, dev); 342 return ENOBUFS; 343 } 344 345 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 346 M_DEVBUF, M_WAITOK); 347 if (!sc->sc_ifbuf) { 348 ppb_release_bus(ppbus, dev); 349 return ENOBUFS; 350 } 351 352 /* attach our interrupt handler, later detached when the bus is released */ 353 if ((error = BUS_SETUP_INTR(ppbus, dev, sc->res_irq, 354 INTR_TYPE_NET, lp_intr, dev, &ih))) { 355 ppb_release_bus(ppbus, dev); 356 return (error); 357 } 358 359 ppb_wctr(ppbus, IRQENABLE); 360 ifp->if_flags |= IFF_RUNNING; 361 } 362 break; 363 364 case SIOCSIFMTU: 365 ptr = sc->sc_ifbuf; 366 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 367 if (!sc->sc_ifbuf) { 368 sc->sc_ifbuf = ptr; 369 return ENOBUFS; 370 } 371 if (ptr) 372 free(ptr,M_DEVBUF); 373 sc->sc_if.if_mtu = ifr->ifr_mtu; 374 break; 375 376 case SIOCGIFMTU: 377 ifr->ifr_mtu = sc->sc_if.if_mtu; 378 break; 379 380 case SIOCADDMULTI: 381 case SIOCDELMULTI: 382 if (ifr == 0) { 383 return EAFNOSUPPORT; /* XXX */ 384 } 385 switch (ifr->ifr_addr.sa_family) { 386 387 case AF_INET: 388 break; 389 390 default: 391 return EAFNOSUPPORT; 392 } 393 break; 394 395 case SIOCGIFMEDIA: 396 /* 397 * No ifmedia support at this stage; maybe use it 398 * in future for eg. protocol selection. 399 */ 400 return EINVAL; 401 402 default: 403 lprintf("LP:ioctl(0x%lx)\n", cmd); 404 return EINVAL; 405 } 406 return 0; 407 } 408 409 static __inline int 410 clpoutbyte (u_char byte, int spin, device_t ppbus) 411 { 412 ppb_wdtr(ppbus, ctxmitl[byte]); 413 while (ppb_rstr(ppbus) & CLPIP_SHAKE) 414 if (--spin == 0) { 415 return 1; 416 } 417 ppb_wdtr(ppbus, ctxmith[byte]); 418 while (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 419 if (--spin == 0) { 420 return 1; 421 } 422 return 0; 423 } 424 425 static __inline int 426 clpinbyte (int spin, device_t ppbus) 427 { 428 u_char c, cl; 429 430 while((ppb_rstr(ppbus) & CLPIP_SHAKE)) 431 if(!--spin) { 432 return -1; 433 } 434 cl = ppb_rstr(ppbus); 435 ppb_wdtr(ppbus, 0x10); 436 437 while(!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 438 if(!--spin) { 439 return -1; 440 } 441 c = ppb_rstr(ppbus); 442 ppb_wdtr(ppbus, 0x00); 443 444 return (ctrecvl[cl] | ctrecvh[c]); 445 } 446 447 static void 448 lptap(struct ifnet *ifp, struct mbuf *m) 449 { 450 u_int32_t af = AF_INET; 451 BPF_MTAP2(ifp, &af, sizeof(af), m); 452 } 453 454 static void 455 lp_intr (void *arg) 456 { 457 device_t dev = (device_t)arg; 458 device_t ppbus = device_get_parent(dev); 459 struct lp_data *sc = DEVTOSOFTC(dev); 460 int len, s, j; 461 u_char *bp; 462 u_char c, cl; 463 struct mbuf *top; 464 465 s = splhigh(); 466 467 if (sc->sc_if.if_flags & IFF_LINK0) { 468 469 /* Ack. the request */ 470 ppb_wdtr(ppbus, 0x01); 471 472 /* Get the packet length */ 473 j = clpinbyte(LPMAXSPIN2, ppbus); 474 if (j == -1) 475 goto err; 476 len = j; 477 j = clpinbyte(LPMAXSPIN2, ppbus); 478 if (j == -1) 479 goto err; 480 len = len + (j << 8); 481 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 482 goto err; 483 484 bp = sc->sc_ifbuf; 485 486 while (len--) { 487 j = clpinbyte(LPMAXSPIN2, ppbus); 488 if (j == -1) { 489 goto err; 490 } 491 *bp++ = j; 492 } 493 /* Get and ignore checksum */ 494 j = clpinbyte(LPMAXSPIN2, ppbus); 495 if (j == -1) { 496 goto err; 497 } 498 499 len = bp - sc->sc_ifbuf; 500 if (len <= CLPIPHDRLEN) 501 goto err; 502 503 sc->sc_iferrs = 0; 504 505 len -= CLPIPHDRLEN; 506 sc->sc_if.if_ipackets++; 507 sc->sc_if.if_ibytes += len; 508 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 509 if (top) { 510 if (sc->sc_if.if_bpf) 511 lptap(&sc->sc_if, top); 512 netisr_queue(NETISR_IP, top); 513 } 514 goto done; 515 } 516 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) { 517 len = sc->sc_if.if_mtu + LPIPHDRLEN; 518 bp = sc->sc_ifbuf; 519 while (len--) { 520 521 cl = ppb_rstr(ppbus); 522 ppb_wdtr(ppbus, 8); 523 524 j = LPMAXSPIN2; 525 while((ppb_rstr(ppbus) & LPIP_SHAKE)) 526 if(!--j) goto err; 527 528 c = ppb_rstr(ppbus); 529 ppb_wdtr(ppbus, 0); 530 531 *bp++= trecvh[cl] | trecvl[c]; 532 533 j = LPMAXSPIN2; 534 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) { 535 if (cl != c && 536 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) == 537 (c & 0xf8)) 538 goto end; 539 if (!--j) goto err; 540 } 541 } 542 543 end: 544 len = bp - sc->sc_ifbuf; 545 if (len <= LPIPHDRLEN) 546 goto err; 547 548 sc->sc_iferrs = 0; 549 550 len -= LPIPHDRLEN; 551 sc->sc_if.if_ipackets++; 552 sc->sc_if.if_ibytes += len; 553 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 554 if (top) { 555 if (sc->sc_if.if_bpf) 556 lptap(&sc->sc_if, top); 557 netisr_queue(NETISR_IP, top); 558 } 559 } 560 goto done; 561 562 err: 563 ppb_wdtr(ppbus, 0); 564 lprintf("R"); 565 sc->sc_if.if_ierrors++; 566 sc->sc_iferrs++; 567 568 /* 569 * We are not able to send receive anything for now, 570 * so stop wasting our time 571 */ 572 if (sc->sc_iferrs > LPMAXERRS) { 573 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev)); 574 ppb_wctr(ppbus, 0x00); 575 sc->sc_if.if_flags &= ~IFF_RUNNING; 576 sc->sc_iferrs=0; 577 } 578 579 done: 580 splx(s); 581 return; 582 } 583 584 static __inline int 585 lpoutbyte (u_char byte, int spin, device_t ppbus) 586 { 587 ppb_wdtr(ppbus, txmith[byte]); 588 while (!(ppb_rstr(ppbus) & LPIP_SHAKE)) 589 if (--spin == 0) 590 return 1; 591 ppb_wdtr(ppbus, txmitl[byte]); 592 while (ppb_rstr(ppbus) & LPIP_SHAKE) 593 if (--spin == 0) 594 return 1; 595 return 0; 596 } 597 598 static int 599 lpoutput (struct ifnet *ifp, struct mbuf *m, 600 struct sockaddr *dst, struct rtentry *rt) 601 { 602 device_t dev = UNITODEVICE(ifp->if_dunit); 603 device_t ppbus = device_get_parent(dev); 604 int s, err; 605 struct mbuf *mm; 606 u_char *cp = "\0\0"; 607 u_char chksum = 0; 608 int count = 0; 609 int i, len, spin; 610 611 /* We need a sensible value if we abort */ 612 cp++; 613 ifp->if_flags |= IFF_RUNNING; 614 615 err = 1; /* assume we're aborting because of an error */ 616 617 s = splhigh(); 618 619 /* Suspend (on laptops) or receive-errors might have taken us offline */ 620 ppb_wctr(ppbus, IRQENABLE); 621 622 if (ifp->if_flags & IFF_LINK0) { 623 624 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 625 lprintf("&"); 626 lp_intr(dev); 627 } 628 629 /* Alert other end to pending packet */ 630 spin = LPMAXSPIN1; 631 ppb_wdtr(ppbus, 0x08); 632 while ((ppb_rstr(ppbus) & 0x08) == 0) 633 if (--spin == 0) { 634 goto nend; 635 } 636 637 /* Calculate length of packet, then send that */ 638 639 count += 14; /* Ethernet header len */ 640 641 mm = m; 642 for (mm = m; mm; mm = mm->m_next) { 643 count += mm->m_len; 644 } 645 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus)) 646 goto nend; 647 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus)) 648 goto nend; 649 650 /* Send dummy ethernet header */ 651 for (i = 0; i < 12; i++) { 652 if (clpoutbyte(i, LPMAXSPIN1, ppbus)) 653 goto nend; 654 chksum += i; 655 } 656 657 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus)) 658 goto nend; 659 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus)) 660 goto nend; 661 chksum += 0x08 + 0x00; /* Add into checksum */ 662 663 mm = m; 664 do { 665 cp = mtod(mm, u_char *); 666 len = mm->m_len; 667 while (len--) { 668 chksum += *cp; 669 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 670 goto nend; 671 } 672 } while ((mm = mm->m_next)); 673 674 /* Send checksum */ 675 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus)) 676 goto nend; 677 678 /* Go quiescent */ 679 ppb_wdtr(ppbus, 0); 680 681 err = 0; /* No errors */ 682 683 nend: 684 if (err) { /* if we didn't timeout... */ 685 ifp->if_oerrors++; 686 lprintf("X"); 687 } else { 688 ifp->if_opackets++; 689 ifp->if_obytes += m->m_pkthdr.len; 690 if (ifp->if_bpf) 691 lptap(ifp, m); 692 } 693 694 m_freem(m); 695 696 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 697 lprintf("^"); 698 lp_intr(dev); 699 } 700 (void) splx(s); 701 return 0; 702 } 703 704 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 705 lprintf("&"); 706 lp_intr(dev); 707 } 708 709 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus)) 710 goto end; 711 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus)) 712 goto end; 713 714 mm = m; 715 do { 716 cp = mtod(mm,u_char *); 717 len = mm->m_len; 718 while (len--) 719 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 720 goto end; 721 } while ((mm = mm->m_next)); 722 723 err = 0; /* no errors were encountered */ 724 725 end: 726 --cp; 727 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17); 728 729 if (err) { /* if we didn't timeout... */ 730 ifp->if_oerrors++; 731 lprintf("X"); 732 } else { 733 ifp->if_opackets++; 734 ifp->if_obytes += m->m_pkthdr.len; 735 if (ifp->if_bpf) 736 lptap(ifp, m); 737 } 738 739 m_freem(m); 740 741 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 742 lprintf("^"); 743 lp_intr(dev); 744 } 745 746 (void) splx(s); 747 return 0; 748 } 749 750 static device_method_t lp_methods[] = { 751 /* device interface */ 752 DEVMETHOD(device_identify, lp_identify), 753 DEVMETHOD(device_probe, lp_probe), 754 DEVMETHOD(device_attach, lp_attach), 755 756 { 0, 0 } 757 }; 758 759 static driver_t lp_driver = { 760 "plip", 761 lp_methods, 762 sizeof(struct lp_data), 763 }; 764 765 DRIVER_MODULE(plip, ppbus, lp_driver, lp_devclass, 0, 0); 766