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 { 186 187 BUS_ADD_CHILD(parent, 0, "plip", -1); 188 } 189 /* 190 * lpprobe() 191 */ 192 static int 193 lp_probe(device_t dev) 194 { 195 device_t ppbus = device_get_parent(dev); 196 struct lp_data *lp; 197 int zero = 0; 198 uintptr_t irq; 199 200 lp = DEVTOSOFTC(dev); 201 bzero(lp, sizeof(struct lp_data)); 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 = &lp->sc_if; 234 235 ifp->if_softc = lp; 236 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 237 ifp->if_mtu = LPMTU; 238 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 239 ifp->if_ioctl = lpioctl; 240 ifp->if_output = lpoutput; 241 ifp->if_type = IFT_PARA; 242 ifp->if_hdrlen = 0; 243 ifp->if_addrlen = 0; 244 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 245 if_attach(ifp); 246 247 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t)); 248 249 return (0); 250 } 251 /* 252 * Build the translation tables for the LPIP (BSD unix) protocol. 253 * We don't want to calculate these nasties in our tight loop, so we 254 * precalculate them when we initialize. 255 */ 256 static int 257 lpinittables (void) 258 { 259 int i; 260 261 if (!txmith) 262 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 263 264 if (!txmith) 265 return 1; 266 267 if (!ctxmith) 268 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 269 270 if (!ctxmith) 271 return 1; 272 273 for (i=0; i < LPIPTBLSIZE; i++) { 274 ctxmith[i] = (i & 0xF0) >> 4; 275 ctxmitl[i] = 0x10 | (i & 0x0F); 276 ctrecvh[i] = (i & 0x78) << 1; 277 ctrecvl[i] = (i & 0x78) >> 3; 278 } 279 280 for (i=0; i < LPIPTBLSIZE; i++) { 281 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 282 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 283 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 284 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 285 } 286 287 return 0; 288 } 289 290 /* 291 * Process an ioctl request. 292 */ 293 294 static int 295 lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 296 { 297 device_t dev = UNITODEVICE(ifp->if_dunit); 298 device_t ppbus = device_get_parent(dev); 299 struct lp_data *sc = DEVTOSOFTC(dev); 300 struct ifaddr *ifa = (struct ifaddr *)data; 301 struct ifreq *ifr = (struct ifreq *)data; 302 u_char *ptr; 303 void *ih; 304 int error; 305 306 switch (cmd) { 307 308 case SIOCSIFDSTADDR: 309 case SIOCAIFADDR: 310 case SIOCSIFADDR: 311 if (ifa->ifa_addr->sa_family != AF_INET) 312 return EAFNOSUPPORT; 313 314 ifp->if_flags |= IFF_UP; 315 /* FALLTHROUGH */ 316 case SIOCSIFFLAGS: 317 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 318 319 ppb_wctr(ppbus, 0x00); 320 ifp->if_flags &= ~IFF_RUNNING; 321 322 /* IFF_UP is not set, try to release the bus anyway */ 323 ppb_release_bus(ppbus, dev); 324 break; 325 } 326 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 327 328 /* XXX 329 * Should the request be interruptible? 330 */ 331 if ((error = ppb_request_bus(ppbus, dev, PPB_WAIT|PPB_INTR))) 332 return (error); 333 334 /* Now IFF_UP means that we own the bus */ 335 336 ppb_set_mode(ppbus, PPB_COMPATIBLE); 337 338 if (lpinittables()) { 339 ppb_release_bus(ppbus, dev); 340 return ENOBUFS; 341 } 342 343 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 344 M_DEVBUF, M_WAITOK); 345 if (!sc->sc_ifbuf) { 346 ppb_release_bus(ppbus, dev); 347 return ENOBUFS; 348 } 349 350 /* attach our interrupt handler, later detached when the bus is released */ 351 if ((error = BUS_SETUP_INTR(ppbus, dev, sc->res_irq, 352 INTR_TYPE_NET, lp_intr, dev, &ih))) { 353 ppb_release_bus(ppbus, dev); 354 return (error); 355 } 356 357 ppb_wctr(ppbus, IRQENABLE); 358 ifp->if_flags |= IFF_RUNNING; 359 } 360 break; 361 362 case SIOCSIFMTU: 363 ptr = sc->sc_ifbuf; 364 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 365 if (!sc->sc_ifbuf) { 366 sc->sc_ifbuf = ptr; 367 return ENOBUFS; 368 } 369 if (ptr) 370 free(ptr,M_DEVBUF); 371 sc->sc_if.if_mtu = ifr->ifr_mtu; 372 break; 373 374 case SIOCGIFMTU: 375 ifr->ifr_mtu = sc->sc_if.if_mtu; 376 break; 377 378 case SIOCADDMULTI: 379 case SIOCDELMULTI: 380 if (ifr == 0) { 381 return EAFNOSUPPORT; /* XXX */ 382 } 383 switch (ifr->ifr_addr.sa_family) { 384 385 case AF_INET: 386 break; 387 388 default: 389 return EAFNOSUPPORT; 390 } 391 break; 392 393 case SIOCGIFMEDIA: 394 /* 395 * No ifmedia support at this stage; maybe use it 396 * in future for eg. protocol selection. 397 */ 398 return EINVAL; 399 400 default: 401 lprintf("LP:ioctl(0x%lx)\n", cmd); 402 return EINVAL; 403 } 404 return 0; 405 } 406 407 static __inline int 408 clpoutbyte (u_char byte, int spin, device_t ppbus) 409 { 410 ppb_wdtr(ppbus, ctxmitl[byte]); 411 while (ppb_rstr(ppbus) & CLPIP_SHAKE) 412 if (--spin == 0) { 413 return 1; 414 } 415 ppb_wdtr(ppbus, ctxmith[byte]); 416 while (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 417 if (--spin == 0) { 418 return 1; 419 } 420 return 0; 421 } 422 423 static __inline int 424 clpinbyte (int spin, device_t ppbus) 425 { 426 u_char c, cl; 427 428 while((ppb_rstr(ppbus) & CLPIP_SHAKE)) 429 if(!--spin) { 430 return -1; 431 } 432 cl = ppb_rstr(ppbus); 433 ppb_wdtr(ppbus, 0x10); 434 435 while(!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 436 if(!--spin) { 437 return -1; 438 } 439 c = ppb_rstr(ppbus); 440 ppb_wdtr(ppbus, 0x00); 441 442 return (ctrecvl[cl] | ctrecvh[c]); 443 } 444 445 static void 446 lptap(struct ifnet *ifp, struct mbuf *m) 447 { 448 /* 449 * Send a packet through bpf. We need to prepend the address family 450 * as a four byte field. Cons up a dummy header to pacify bpf. This 451 * is safe because bpf will only read from the mbuf (i.e., it won't 452 * try to free it or keep a pointer to it). 453 */ 454 u_int32_t af = AF_INET; 455 struct mbuf m0; 456 457 m0.m_next = m; 458 m0.m_len = sizeof(u_int32_t); 459 m0.m_data = (char *)⁡ 460 BPF_MTAP(ifp, &m0); 461 } 462 463 static void 464 lp_intr (void *arg) 465 { 466 device_t dev = (device_t)arg; 467 device_t ppbus = device_get_parent(dev); 468 struct lp_data *sc = DEVTOSOFTC(dev); 469 int len, s, j; 470 u_char *bp; 471 u_char c, cl; 472 struct mbuf *top; 473 474 s = splhigh(); 475 476 if (sc->sc_if.if_flags & IFF_LINK0) { 477 478 /* Ack. the request */ 479 ppb_wdtr(ppbus, 0x01); 480 481 /* Get the packet length */ 482 j = clpinbyte(LPMAXSPIN2, ppbus); 483 if (j == -1) 484 goto err; 485 len = j; 486 j = clpinbyte(LPMAXSPIN2, ppbus); 487 if (j == -1) 488 goto err; 489 len = len + (j << 8); 490 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 491 goto err; 492 493 bp = sc->sc_ifbuf; 494 495 while (len--) { 496 j = clpinbyte(LPMAXSPIN2, ppbus); 497 if (j == -1) { 498 goto err; 499 } 500 *bp++ = j; 501 } 502 /* Get and ignore checksum */ 503 j = clpinbyte(LPMAXSPIN2, ppbus); 504 if (j == -1) { 505 goto err; 506 } 507 508 len = bp - sc->sc_ifbuf; 509 if (len <= CLPIPHDRLEN) 510 goto err; 511 512 sc->sc_iferrs = 0; 513 514 len -= CLPIPHDRLEN; 515 sc->sc_if.if_ipackets++; 516 sc->sc_if.if_ibytes += len; 517 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 518 if (top) { 519 if (sc->sc_if.if_bpf) 520 lptap(&sc->sc_if, top); 521 netisr_queue(NETISR_IP, top); 522 } 523 goto done; 524 } 525 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) { 526 len = sc->sc_if.if_mtu + LPIPHDRLEN; 527 bp = sc->sc_ifbuf; 528 while (len--) { 529 530 cl = ppb_rstr(ppbus); 531 ppb_wdtr(ppbus, 8); 532 533 j = LPMAXSPIN2; 534 while((ppb_rstr(ppbus) & LPIP_SHAKE)) 535 if(!--j) goto err; 536 537 c = ppb_rstr(ppbus); 538 ppb_wdtr(ppbus, 0); 539 540 *bp++= trecvh[cl] | trecvl[c]; 541 542 j = LPMAXSPIN2; 543 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) { 544 if (cl != c && 545 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) == 546 (c & 0xf8)) 547 goto end; 548 if (!--j) goto err; 549 } 550 } 551 552 end: 553 len = bp - sc->sc_ifbuf; 554 if (len <= LPIPHDRLEN) 555 goto err; 556 557 sc->sc_iferrs = 0; 558 559 len -= LPIPHDRLEN; 560 sc->sc_if.if_ipackets++; 561 sc->sc_if.if_ibytes += len; 562 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 563 if (top) { 564 if (sc->sc_if.if_bpf) 565 lptap(&sc->sc_if, top); 566 netisr_queue(NETISR_IP, top); 567 } 568 } 569 goto done; 570 571 err: 572 ppb_wdtr(ppbus, 0); 573 lprintf("R"); 574 sc->sc_if.if_ierrors++; 575 sc->sc_iferrs++; 576 577 /* 578 * We are not able to send receive anything for now, 579 * so stop wasting our time 580 */ 581 if (sc->sc_iferrs > LPMAXERRS) { 582 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev)); 583 ppb_wctr(ppbus, 0x00); 584 sc->sc_if.if_flags &= ~IFF_RUNNING; 585 sc->sc_iferrs=0; 586 } 587 588 done: 589 splx(s); 590 return; 591 } 592 593 static __inline int 594 lpoutbyte (u_char byte, int spin, device_t ppbus) 595 { 596 ppb_wdtr(ppbus, txmith[byte]); 597 while (!(ppb_rstr(ppbus) & LPIP_SHAKE)) 598 if (--spin == 0) 599 return 1; 600 ppb_wdtr(ppbus, txmitl[byte]); 601 while (ppb_rstr(ppbus) & LPIP_SHAKE) 602 if (--spin == 0) 603 return 1; 604 return 0; 605 } 606 607 static int 608 lpoutput (struct ifnet *ifp, struct mbuf *m, 609 struct sockaddr *dst, struct rtentry *rt) 610 { 611 device_t dev = UNITODEVICE(ifp->if_dunit); 612 device_t ppbus = device_get_parent(dev); 613 int s, err; 614 struct mbuf *mm; 615 u_char *cp = "\0\0"; 616 u_char chksum = 0; 617 int count = 0; 618 int i, len, spin; 619 620 /* We need a sensible value if we abort */ 621 cp++; 622 ifp->if_flags |= IFF_RUNNING; 623 624 err = 1; /* assume we're aborting because of an error */ 625 626 s = splhigh(); 627 628 /* Suspend (on laptops) or receive-errors might have taken us offline */ 629 ppb_wctr(ppbus, IRQENABLE); 630 631 if (ifp->if_flags & IFF_LINK0) { 632 633 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 634 lprintf("&"); 635 lp_intr(dev); 636 } 637 638 /* Alert other end to pending packet */ 639 spin = LPMAXSPIN1; 640 ppb_wdtr(ppbus, 0x08); 641 while ((ppb_rstr(ppbus) & 0x08) == 0) 642 if (--spin == 0) { 643 goto nend; 644 } 645 646 /* Calculate length of packet, then send that */ 647 648 count += 14; /* Ethernet header len */ 649 650 mm = m; 651 for (mm = m; mm; mm = mm->m_next) { 652 count += mm->m_len; 653 } 654 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus)) 655 goto nend; 656 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus)) 657 goto nend; 658 659 /* Send dummy ethernet header */ 660 for (i = 0; i < 12; i++) { 661 if (clpoutbyte(i, LPMAXSPIN1, ppbus)) 662 goto nend; 663 chksum += i; 664 } 665 666 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus)) 667 goto nend; 668 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus)) 669 goto nend; 670 chksum += 0x08 + 0x00; /* Add into checksum */ 671 672 mm = m; 673 do { 674 cp = mtod(mm, u_char *); 675 len = mm->m_len; 676 while (len--) { 677 chksum += *cp; 678 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 679 goto nend; 680 } 681 } while ((mm = mm->m_next)); 682 683 /* Send checksum */ 684 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus)) 685 goto nend; 686 687 /* Go quiescent */ 688 ppb_wdtr(ppbus, 0); 689 690 err = 0; /* No errors */ 691 692 nend: 693 if (err) { /* if we didn't timeout... */ 694 ifp->if_oerrors++; 695 lprintf("X"); 696 } else { 697 ifp->if_opackets++; 698 ifp->if_obytes += m->m_pkthdr.len; 699 if (ifp->if_bpf) 700 lptap(ifp, m); 701 } 702 703 m_freem(m); 704 705 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 706 lprintf("^"); 707 lp_intr(dev); 708 } 709 (void) splx(s); 710 return 0; 711 } 712 713 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 714 lprintf("&"); 715 lp_intr(dev); 716 } 717 718 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus)) 719 goto end; 720 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus)) 721 goto end; 722 723 mm = m; 724 do { 725 cp = mtod(mm,u_char *); 726 len = mm->m_len; 727 while (len--) 728 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 729 goto end; 730 } while ((mm = mm->m_next)); 731 732 err = 0; /* no errors were encountered */ 733 734 end: 735 --cp; 736 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17); 737 738 if (err) { /* if we didn't timeout... */ 739 ifp->if_oerrors++; 740 lprintf("X"); 741 } else { 742 ifp->if_opackets++; 743 ifp->if_obytes += m->m_pkthdr.len; 744 if (ifp->if_bpf) 745 lptap(ifp, m); 746 } 747 748 m_freem(m); 749 750 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 751 lprintf("^"); 752 lp_intr(dev); 753 } 754 755 (void) splx(s); 756 return 0; 757 } 758 759 static device_method_t lp_methods[] = { 760 /* device interface */ 761 DEVMETHOD(device_identify, lp_identify), 762 DEVMETHOD(device_probe, lp_probe), 763 DEVMETHOD(device_attach, lp_attach), 764 765 { 0, 0 } 766 }; 767 768 static driver_t lp_driver = { 769 "plip", 770 lp_methods, 771 sizeof(struct lp_data), 772 }; 773 774 DRIVER_MODULE(plip, ppbus, lp_driver, lp_devclass, 0, 0); 775