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 * $FreeBSD$ 28 */ 29 30 /* 31 * Parallel port TCP/IP interfaces added. I looked at the driver from 32 * MACH but this is a complete rewrite, and btw. incompatible, and it 33 * should perform better too. I have never run the MACH driver though. 34 * 35 * This driver sends two bytes (0x08, 0x00) in front of each packet, 36 * to allow us to distinguish another format later. 37 * 38 * Now added a Linux/Crynwr compatibility mode which is enabled using 39 * IF_LINK0 - Tim Wilkinson. 40 * 41 * TODO: 42 * Make HDLC/PPP mode, use IF_LLC1 to enable. 43 * 44 * Connect the two computers using a Laplink parallel cable to use this 45 * feature: 46 * 47 * +----------------------------------------+ 48 * |A-name A-End B-End Descr. Port/Bit | 49 * +----------------------------------------+ 50 * |DATA0 2 15 Data 0/0x01 | 51 * |-ERROR 15 2 1/0x08 | 52 * +----------------------------------------+ 53 * |DATA1 3 13 Data 0/0x02 | 54 * |+SLCT 13 3 1/0x10 | 55 * +----------------------------------------+ 56 * |DATA2 4 12 Data 0/0x04 | 57 * |+PE 12 4 1/0x20 | 58 * +----------------------------------------+ 59 * |DATA3 5 10 Strobe 0/0x08 | 60 * |-ACK 10 5 1/0x40 | 61 * +----------------------------------------+ 62 * |DATA4 6 11 Data 0/0x10 | 63 * |BUSY 11 6 1/~0x80 | 64 * +----------------------------------------+ 65 * |GND 18-25 18-25 GND - | 66 * +----------------------------------------+ 67 * 68 * Expect transfer-rates up to 75 kbyte/sec. 69 * 70 * If GCC could correctly grok 71 * register int port asm("edx") 72 * the code would be cleaner 73 * 74 * Poul-Henning Kamp <phk@freebsd.org> 75 */ 76 77 /* 78 * Update for ppbus, PLIP support only - Nicolas Souchu 79 */ 80 81 #include "opt_plip.h" 82 83 #include <sys/param.h> 84 #include <sys/systm.h> 85 #include <sys/module.h> 86 #include <sys/bus.h> 87 #include <sys/mbuf.h> 88 #include <sys/socket.h> 89 #include <sys/sockio.h> 90 #include <sys/kernel.h> 91 #include <sys/malloc.h> 92 93 #include <machine/bus.h> 94 #include <machine/resource.h> 95 #include <sys/rman.h> 96 97 #include <net/if.h> 98 #include <net/if_types.h> 99 #include <net/netisr.h> 100 101 #include <netinet/in.h> 102 #include <netinet/in_var.h> 103 104 #include <net/bpf.h> 105 106 #include <dev/ppbus/ppbconf.h> 107 #include "ppbus_if.h" 108 #include <dev/ppbus/ppbio.h> 109 110 #ifndef LPMTU /* MTU for the lp# interfaces */ 111 #define LPMTU 1500 112 #endif 113 114 #ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 115 #define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 116 #endif 117 118 #ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 119 #define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 120 #endif 121 122 #ifndef LPMAXERRS /* Max errors before !RUNNING */ 123 #define LPMAXERRS 100 124 #endif 125 126 #define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 127 #define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 128 #define MLPIPHDRLEN CLPIPHDRLEN 129 130 #define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 131 #define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 132 #if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 133 #define MLPIPHDRLEN LPIPHDRLEN 134 #endif 135 136 #define LPIPTBLSIZE 256 /* Size of octet translation table */ 137 138 #define lprintf if (lptflag) printf 139 140 #ifdef PLIP_DEBUG 141 static int volatile lptflag = 1; 142 #else 143 static int volatile lptflag = 0; 144 #endif 145 146 struct lp_data { 147 unsigned short lp_unit; 148 149 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 lp->lp_unit = device_get_unit(dev); 224 225 device_set_desc(dev, "PLIP network interface"); 226 227 return (0); 228 } 229 230 static int 231 lp_attach (device_t dev) 232 { 233 struct lp_data *lp = DEVTOSOFTC(dev); 234 struct ifnet *ifp = &lp->sc_if; 235 236 ifp->if_softc = lp; 237 ifp->if_name = "lp"; 238 ifp->if_unit = 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_unit); 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 /* 451 * Send a packet through bpf. We need to prepend the address family 452 * as a four byte field. Cons up a dummy header to pacify bpf. This 453 * is safe because bpf will only read from the mbuf (i.e., it won't 454 * try to free it or keep a pointer to it). 455 */ 456 u_int32_t af = AF_INET; 457 struct mbuf m0; 458 459 m0.m_next = m; 460 m0.m_len = sizeof(u_int32_t); 461 m0.m_data = (char *)⁡ 462 BPF_MTAP(ifp, &m0); 463 } 464 465 static void 466 lp_intr (void *arg) 467 { 468 device_t dev = (device_t)arg; 469 device_t ppbus = device_get_parent(dev); 470 struct lp_data *sc = DEVTOSOFTC(dev); 471 int len, s, j; 472 u_char *bp; 473 u_char c, cl; 474 struct mbuf *top; 475 476 s = splhigh(); 477 478 if (sc->sc_if.if_flags & IFF_LINK0) { 479 480 /* Ack. the request */ 481 ppb_wdtr(ppbus, 0x01); 482 483 /* Get the packet length */ 484 j = clpinbyte(LPMAXSPIN2, ppbus); 485 if (j == -1) 486 goto err; 487 len = j; 488 j = clpinbyte(LPMAXSPIN2, ppbus); 489 if (j == -1) 490 goto err; 491 len = len + (j << 8); 492 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 493 goto err; 494 495 bp = sc->sc_ifbuf; 496 497 while (len--) { 498 j = clpinbyte(LPMAXSPIN2, ppbus); 499 if (j == -1) { 500 goto err; 501 } 502 *bp++ = j; 503 } 504 /* Get and ignore checksum */ 505 j = clpinbyte(LPMAXSPIN2, ppbus); 506 if (j == -1) { 507 goto err; 508 } 509 510 len = bp - sc->sc_ifbuf; 511 if (len <= CLPIPHDRLEN) 512 goto err; 513 514 sc->sc_iferrs = 0; 515 516 len -= CLPIPHDRLEN; 517 sc->sc_if.if_ipackets++; 518 sc->sc_if.if_ibytes += len; 519 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 520 if (top) { 521 if (sc->sc_if.if_bpf) 522 lptap(&sc->sc_if, top); 523 if (! IF_HANDOFF(&ipintrq, top, NULL)) { 524 lprintf("DROP"); 525 } else { 526 schednetisr(NETISR_IP); 527 } 528 } 529 goto done; 530 } 531 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) { 532 len = sc->sc_if.if_mtu + LPIPHDRLEN; 533 bp = sc->sc_ifbuf; 534 while (len--) { 535 536 cl = ppb_rstr(ppbus); 537 ppb_wdtr(ppbus, 8); 538 539 j = LPMAXSPIN2; 540 while((ppb_rstr(ppbus) & LPIP_SHAKE)) 541 if(!--j) goto err; 542 543 c = ppb_rstr(ppbus); 544 ppb_wdtr(ppbus, 0); 545 546 *bp++= trecvh[cl] | trecvl[c]; 547 548 j = LPMAXSPIN2; 549 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) { 550 if (cl != c && 551 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) == 552 (c & 0xf8)) 553 goto end; 554 if (!--j) goto err; 555 } 556 } 557 558 end: 559 len = bp - sc->sc_ifbuf; 560 if (len <= LPIPHDRLEN) 561 goto err; 562 563 sc->sc_iferrs = 0; 564 565 len -= LPIPHDRLEN; 566 sc->sc_if.if_ipackets++; 567 sc->sc_if.if_ibytes += len; 568 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 569 if (top) { 570 if (sc->sc_if.if_bpf) 571 lptap(&sc->sc_if, top); 572 if (! IF_HANDOFF(&ipintrq, top, NULL)) { 573 lprintf("DROP"); 574 } else { 575 schednetisr(NETISR_IP); 576 } 577 } 578 } 579 goto done; 580 581 err: 582 ppb_wdtr(ppbus, 0); 583 lprintf("R"); 584 sc->sc_if.if_ierrors++; 585 sc->sc_iferrs++; 586 587 /* 588 * We are not able to send receive anything for now, 589 * so stop wasting our time 590 */ 591 if (sc->sc_iferrs > LPMAXERRS) { 592 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev)); 593 ppb_wctr(ppbus, 0x00); 594 sc->sc_if.if_flags &= ~IFF_RUNNING; 595 sc->sc_iferrs=0; 596 } 597 598 done: 599 splx(s); 600 return; 601 } 602 603 static __inline int 604 lpoutbyte (u_char byte, int spin, device_t ppbus) 605 { 606 ppb_wdtr(ppbus, txmith[byte]); 607 while (!(ppb_rstr(ppbus) & LPIP_SHAKE)) 608 if (--spin == 0) 609 return 1; 610 ppb_wdtr(ppbus, txmitl[byte]); 611 while (ppb_rstr(ppbus) & LPIP_SHAKE) 612 if (--spin == 0) 613 return 1; 614 return 0; 615 } 616 617 static int 618 lpoutput (struct ifnet *ifp, struct mbuf *m, 619 struct sockaddr *dst, struct rtentry *rt) 620 { 621 device_t dev = UNITODEVICE(ifp->if_unit); 622 device_t ppbus = device_get_parent(dev); 623 int s, err; 624 struct mbuf *mm; 625 u_char *cp = "\0\0"; 626 u_char chksum = 0; 627 int count = 0; 628 int i, len, spin; 629 630 /* We need a sensible value if we abort */ 631 cp++; 632 ifp->if_flags |= IFF_RUNNING; 633 634 err = 1; /* assume we're aborting because of an error */ 635 636 s = splhigh(); 637 638 /* Suspend (on laptops) or receive-errors might have taken us offline */ 639 ppb_wctr(ppbus, IRQENABLE); 640 641 if (ifp->if_flags & IFF_LINK0) { 642 643 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 644 lprintf("&"); 645 lp_intr(dev); 646 } 647 648 /* Alert other end to pending packet */ 649 spin = LPMAXSPIN1; 650 ppb_wdtr(ppbus, 0x08); 651 while ((ppb_rstr(ppbus) & 0x08) == 0) 652 if (--spin == 0) { 653 goto nend; 654 } 655 656 /* Calculate length of packet, then send that */ 657 658 count += 14; /* Ethernet header len */ 659 660 mm = m; 661 for (mm = m; mm; mm = mm->m_next) { 662 count += mm->m_len; 663 } 664 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus)) 665 goto nend; 666 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus)) 667 goto nend; 668 669 /* Send dummy ethernet header */ 670 for (i = 0; i < 12; i++) { 671 if (clpoutbyte(i, LPMAXSPIN1, ppbus)) 672 goto nend; 673 chksum += i; 674 } 675 676 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus)) 677 goto nend; 678 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus)) 679 goto nend; 680 chksum += 0x08 + 0x00; /* Add into checksum */ 681 682 mm = m; 683 do { 684 cp = mtod(mm, u_char *); 685 len = mm->m_len; 686 while (len--) { 687 chksum += *cp; 688 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 689 goto nend; 690 } 691 } while ((mm = mm->m_next)); 692 693 /* Send checksum */ 694 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus)) 695 goto nend; 696 697 /* Go quiescent */ 698 ppb_wdtr(ppbus, 0); 699 700 err = 0; /* No errors */ 701 702 nend: 703 if (err) { /* if we didn't timeout... */ 704 ifp->if_oerrors++; 705 lprintf("X"); 706 } else { 707 ifp->if_opackets++; 708 ifp->if_obytes += m->m_pkthdr.len; 709 if (ifp->if_bpf) 710 lptap(ifp, m); 711 } 712 713 m_freem(m); 714 715 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 716 lprintf("^"); 717 lp_intr(dev); 718 } 719 (void) splx(s); 720 return 0; 721 } 722 723 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 724 lprintf("&"); 725 lp_intr(dev); 726 } 727 728 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus)) 729 goto end; 730 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus)) 731 goto end; 732 733 mm = m; 734 do { 735 cp = mtod(mm,u_char *); 736 len = mm->m_len; 737 while (len--) 738 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 739 goto end; 740 } while ((mm = mm->m_next)); 741 742 err = 0; /* no errors were encountered */ 743 744 end: 745 --cp; 746 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17); 747 748 if (err) { /* if we didn't timeout... */ 749 ifp->if_oerrors++; 750 lprintf("X"); 751 } else { 752 ifp->if_opackets++; 753 ifp->if_obytes += m->m_pkthdr.len; 754 if (ifp->if_bpf) 755 lptap(ifp, m); 756 } 757 758 m_freem(m); 759 760 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 761 lprintf("^"); 762 lp_intr(dev); 763 } 764 765 (void) splx(s); 766 return 0; 767 } 768 769 static device_method_t lp_methods[] = { 770 /* device interface */ 771 DEVMETHOD(device_identify, lp_identify), 772 DEVMETHOD(device_probe, lp_probe), 773 DEVMETHOD(device_attach, lp_attach), 774 775 { 0, 0 } 776 }; 777 778 static driver_t lp_driver = { 779 "plip", 780 lp_methods, 781 sizeof(struct lp_data), 782 }; 783 784 DRIVER_MODULE(plip, ppbus, lp_driver, lp_devclass, 0, 0); 785