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 1.6 2004/01/06 03:17:24 dillon 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); 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_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 /* 452 * Send a packet through bpf. We need to prepend the address family 453 * as a four byte field. Cons up a dummy header to pacify bpf. This 454 * is safe because bpf will only read from the mbuf (i.e., it won't 455 * try to free it or keep a pointer to it). 456 */ 457 u_int32_t af = AF_INET; 458 struct mbuf m0; 459 460 m0.m_next = m; 461 m0.m_len = sizeof(u_int32_t); 462 m0.m_data = (char *)⁡ 463 bpf_mtap(ifp, &m0); 464 } 465 466 static void 467 lp_intr (void *arg) 468 { 469 device_t dev = (device_t)arg; 470 device_t ppbus = device_get_parent(dev); 471 struct lp_data *sc = DEVTOSOFTC(dev); 472 int len, s, j; 473 u_char *bp; 474 u_char c, cl; 475 struct mbuf *top; 476 477 s = splhigh(); 478 479 if (sc->sc_if.if_flags & IFF_LINK0) { 480 481 /* Ack. the request */ 482 ppb_wdtr(ppbus, 0x01); 483 484 /* Get the packet length */ 485 j = clpinbyte(LPMAXSPIN2, ppbus); 486 if (j == -1) 487 goto err; 488 len = j; 489 j = clpinbyte(LPMAXSPIN2, ppbus); 490 if (j == -1) 491 goto err; 492 len = len + (j << 8); 493 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 494 goto err; 495 496 bp = sc->sc_ifbuf; 497 498 while (len--) { 499 j = clpinbyte(LPMAXSPIN2, ppbus); 500 if (j == -1) { 501 goto err; 502 } 503 *bp++ = j; 504 } 505 /* Get and ignore checksum */ 506 j = clpinbyte(LPMAXSPIN2, ppbus); 507 if (j == -1) { 508 goto err; 509 } 510 511 len = bp - sc->sc_ifbuf; 512 if (len <= CLPIPHDRLEN) 513 goto err; 514 515 sc->sc_iferrs = 0; 516 517 len -= CLPIPHDRLEN; 518 sc->sc_if.if_ipackets++; 519 sc->sc_if.if_ibytes += len; 520 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 521 if (top) { 522 if (sc->sc_if.if_bpf) 523 lptap(&sc->sc_if, top); 524 netisr_queue(NETISR_IP, top); 525 } 526 goto done; 527 } 528 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) { 529 len = sc->sc_if.if_mtu + LPIPHDRLEN; 530 bp = sc->sc_ifbuf; 531 while (len--) { 532 533 cl = ppb_rstr(ppbus); 534 ppb_wdtr(ppbus, 8); 535 536 j = LPMAXSPIN2; 537 while((ppb_rstr(ppbus) & LPIP_SHAKE)) 538 if(!--j) goto err; 539 540 c = ppb_rstr(ppbus); 541 ppb_wdtr(ppbus, 0); 542 543 *bp++= trecvh[cl] | trecvl[c]; 544 545 j = LPMAXSPIN2; 546 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) { 547 if (cl != c && 548 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) == 549 (c & 0xf8)) 550 goto end; 551 if (!--j) goto err; 552 } 553 } 554 555 end: 556 len = bp - sc->sc_ifbuf; 557 if (len <= LPIPHDRLEN) 558 goto err; 559 560 sc->sc_iferrs = 0; 561 562 len -= LPIPHDRLEN; 563 sc->sc_if.if_ipackets++; 564 sc->sc_if.if_ibytes += len; 565 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 566 if (top) { 567 if (sc->sc_if.if_bpf) 568 lptap(&sc->sc_if, top); 569 netisr_queue(NETISR_IP, top); 570 } 571 } 572 goto done; 573 574 err: 575 ppb_wdtr(ppbus, 0); 576 lprintf("R"); 577 sc->sc_if.if_ierrors++; 578 sc->sc_iferrs++; 579 580 /* 581 * We are not able to send receive anything for now, 582 * so stop wasting our time 583 */ 584 if (sc->sc_iferrs > LPMAXERRS) { 585 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev)); 586 ppb_wctr(ppbus, 0x00); 587 sc->sc_if.if_flags &= ~IFF_RUNNING; 588 sc->sc_iferrs=0; 589 } 590 591 done: 592 splx(s); 593 return; 594 } 595 596 static __inline int 597 lpoutbyte (u_char byte, int spin, device_t ppbus) 598 { 599 ppb_wdtr(ppbus, txmith[byte]); 600 while (!(ppb_rstr(ppbus) & LPIP_SHAKE)) 601 if (--spin == 0) 602 return 1; 603 ppb_wdtr(ppbus, txmitl[byte]); 604 while (ppb_rstr(ppbus) & LPIP_SHAKE) 605 if (--spin == 0) 606 return 1; 607 return 0; 608 } 609 610 static int 611 lpoutput (struct ifnet *ifp, struct mbuf *m, 612 struct sockaddr *dst, struct rtentry *rt) 613 { 614 device_t dev = UNITODEVICE(ifp->if_dunit); 615 device_t ppbus = device_get_parent(dev); 616 int s, err; 617 struct mbuf *mm; 618 u_char *cp = "\0\0"; 619 u_char chksum = 0; 620 int count = 0; 621 int i, len, spin; 622 623 /* We need a sensible value if we abort */ 624 cp++; 625 ifp->if_flags |= IFF_RUNNING; 626 627 err = 1; /* assume we're aborting because of an error */ 628 629 s = splhigh(); 630 631 /* Suspend (on laptops) or receive-errors might have taken us offline */ 632 ppb_wctr(ppbus, IRQENABLE); 633 634 if (ifp->if_flags & IFF_LINK0) { 635 636 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 637 lprintf("&"); 638 lp_intr(dev); 639 } 640 641 /* Alert other end to pending packet */ 642 spin = LPMAXSPIN1; 643 ppb_wdtr(ppbus, 0x08); 644 while ((ppb_rstr(ppbus) & 0x08) == 0) 645 if (--spin == 0) { 646 goto nend; 647 } 648 649 /* Calculate length of packet, then send that */ 650 651 count += 14; /* Ethernet header len */ 652 653 mm = m; 654 for (mm = m; mm; mm = mm->m_next) { 655 count += mm->m_len; 656 } 657 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus)) 658 goto nend; 659 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus)) 660 goto nend; 661 662 /* Send dummy ethernet header */ 663 for (i = 0; i < 12; i++) { 664 if (clpoutbyte(i, LPMAXSPIN1, ppbus)) 665 goto nend; 666 chksum += i; 667 } 668 669 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus)) 670 goto nend; 671 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus)) 672 goto nend; 673 chksum += 0x08 + 0x00; /* Add into checksum */ 674 675 mm = m; 676 do { 677 cp = mtod(mm, u_char *); 678 len = mm->m_len; 679 while (len--) { 680 chksum += *cp; 681 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 682 goto nend; 683 } 684 } while ((mm = mm->m_next)); 685 686 /* Send checksum */ 687 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus)) 688 goto nend; 689 690 /* Go quiescent */ 691 ppb_wdtr(ppbus, 0); 692 693 err = 0; /* No errors */ 694 695 nend: 696 if (err) { /* if we didn't timeout... */ 697 ifp->if_oerrors++; 698 lprintf("X"); 699 } else { 700 ifp->if_opackets++; 701 ifp->if_obytes += m->m_pkthdr.len; 702 if (ifp->if_bpf) 703 lptap(ifp, m); 704 } 705 706 m_freem(m); 707 708 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 709 lprintf("^"); 710 lp_intr(dev); 711 } 712 (void) splx(s); 713 return 0; 714 } 715 716 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 717 lprintf("&"); 718 lp_intr(dev); 719 } 720 721 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus)) 722 goto end; 723 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus)) 724 goto end; 725 726 mm = m; 727 do { 728 cp = mtod(mm,u_char *); 729 len = mm->m_len; 730 while (len--) 731 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 732 goto end; 733 } while ((mm = mm->m_next)); 734 735 err = 0; /* no errors were encountered */ 736 737 end: 738 --cp; 739 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17); 740 741 if (err) { /* if we didn't timeout... */ 742 ifp->if_oerrors++; 743 lprintf("X"); 744 } else { 745 ifp->if_opackets++; 746 ifp->if_obytes += m->m_pkthdr.len; 747 if (ifp->if_bpf) 748 lptap(ifp, m); 749 } 750 751 m_freem(m); 752 753 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 754 lprintf("^"); 755 lp_intr(dev); 756 } 757 758 (void) splx(s); 759 return 0; 760 } 761 762 static device_method_t lp_methods[] = { 763 /* device interface */ 764 DEVMETHOD(device_identify, lp_identify), 765 DEVMETHOD(device_probe, lp_probe), 766 DEVMETHOD(device_attach, lp_attach), 767 768 { 0, 0 } 769 }; 770 771 static driver_t lp_driver = { 772 "plip", 773 lp_methods, 774 sizeof(struct lp_data), 775 }; 776 777 DECLARE_DUMMY_MODULE(if_plip); 778 DRIVER_MODULE(if_plip, ppbus, lp_driver, lp_devclass, 0, 0); 779 780