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 */ 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 an 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/clock.h> 94 #include <machine/bus.h> 95 #include <machine/resource.h> 96 #include <sys/rman.h> 97 98 #include <net/if.h> 99 #include <net/if_types.h> 100 #include <net/netisr.h> 101 102 #include <netinet/in.h> 103 #include <netinet/in_var.h> 104 105 #include <net/bpf.h> 106 107 #include <dev/ppbus/ppbconf.h> 108 #include "ppbus_if.h" 109 #include <dev/ppbus/ppbio.h> 110 111 #ifndef LPMTU /* MTU for the lp# interfaces */ 112 #define LPMTU 1500 113 #endif 114 115 #ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 116 #define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 117 #endif 118 119 #ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 120 #define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 121 #endif 122 123 #ifndef LPMAXERRS /* Max errors before !RUNNING */ 124 #define LPMAXERRS 100 125 #endif 126 127 #define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 128 #define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 129 #define MLPIPHDRLEN CLPIPHDRLEN 130 131 #define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 132 #define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 133 #if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 134 #define MLPIPHDRLEN LPIPHDRLEN 135 #endif 136 137 #define LPIPTBLSIZE 256 /* Size of octet translation table */ 138 139 #define lprintf if (lptflag) printf 140 141 #ifdef PLIP_DEBUG 142 static int volatile lptflag = 1; 143 #else 144 static int volatile lptflag = 0; 145 #endif 146 147 struct lp_data { 148 unsigned short lp_unit; 149 150 struct ifnet sc_if; 151 u_char *sc_ifbuf; 152 int sc_iferrs; 153 154 struct resource *res_irq; 155 }; 156 157 /* Tables for the lp# interface */ 158 static u_char *txmith; 159 #define txmitl (txmith+(1*LPIPTBLSIZE)) 160 #define trecvh (txmith+(2*LPIPTBLSIZE)) 161 #define trecvl (txmith+(3*LPIPTBLSIZE)) 162 163 static u_char *ctxmith; 164 #define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 165 #define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 166 #define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 167 168 /* Functions for the lp# interface */ 169 static int lpinittables(void); 170 static int lpioctl(struct ifnet *, u_long, caddr_t); 171 static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 172 struct rtentry *); 173 static void lp_intr(void *); 174 175 #define DEVTOSOFTC(dev) \ 176 ((struct lp_data *)device_get_softc(dev)) 177 #define UNITOSOFTC(unit) \ 178 ((struct lp_data *)devclass_get_softc(lp_devclass, (unit))) 179 #define UNITODEVICE(unit) \ 180 (devclass_get_device(lp_devclass, (unit))) 181 182 static devclass_t lp_devclass; 183 184 static void 185 lp_identify(driver_t *driver, device_t parent) 186 { 187 188 BUS_ADD_CHILD(parent, 0, "plip", 0); 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 bzero(lp, sizeof(struct lp_data)); 203 204 /* retrieve the ppbus irq */ 205 BUS_READ_IVAR(ppbus, dev, PPBUS_IVAR_IRQ, &irq); 206 207 /* if we haven't interrupts, the probe fails */ 208 if (irq == -1) { 209 device_printf(dev, "not an interrupt driven port, failed.\n"); 210 return (ENXIO); 211 } 212 213 /* reserve the interrupt resource, expecting irq is available to continue */ 214 lp->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &zero, irq, irq, 1, 215 RF_SHAREABLE); 216 if (lp->res_irq == 0) { 217 device_printf(dev, "cannot reserve interrupt, failed.\n"); 218 return (ENXIO); 219 } 220 221 /* 222 * lp dependent initialisation. 223 */ 224 lp->lp_unit = device_get_unit(dev); 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 ifp->if_name = "lp"; 239 ifp->if_unit = 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_unit); 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 if (IF_QFULL(&ipintrq)) { 518 lprintf("DROP"); 519 IF_DROP(&ipintrq); 520 goto done; 521 } 522 len -= CLPIPHDRLEN; 523 sc->sc_if.if_ipackets++; 524 sc->sc_if.if_ibytes += len; 525 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 526 if (top) { 527 if (sc->sc_if.if_bpf) 528 lptap(&sc->sc_if, top); 529 IF_ENQUEUE(&ipintrq, top); 530 schednetisr(NETISR_IP); 531 } 532 goto done; 533 } 534 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) { 535 len = sc->sc_if.if_mtu + LPIPHDRLEN; 536 bp = sc->sc_ifbuf; 537 while (len--) { 538 539 cl = ppb_rstr(ppbus); 540 ppb_wdtr(ppbus, 8); 541 542 j = LPMAXSPIN2; 543 while((ppb_rstr(ppbus) & LPIP_SHAKE)) 544 if(!--j) goto err; 545 546 c = ppb_rstr(ppbus); 547 ppb_wdtr(ppbus, 0); 548 549 *bp++= trecvh[cl] | trecvl[c]; 550 551 j = LPMAXSPIN2; 552 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) { 553 if (cl != c && 554 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) == 555 (c & 0xf8)) 556 goto end; 557 if (!--j) goto err; 558 } 559 } 560 561 end: 562 len = bp - sc->sc_ifbuf; 563 if (len <= LPIPHDRLEN) 564 goto err; 565 566 sc->sc_iferrs = 0; 567 568 if (IF_QFULL(&ipintrq)) { 569 lprintf("DROP"); 570 IF_DROP(&ipintrq); 571 goto done; 572 } 573 len -= LPIPHDRLEN; 574 sc->sc_if.if_ipackets++; 575 sc->sc_if.if_ibytes += len; 576 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 577 if (top) { 578 if (sc->sc_if.if_bpf) 579 lptap(&sc->sc_if, top); 580 IF_ENQUEUE(&ipintrq, top); 581 schednetisr(NETISR_IP); 582 } 583 } 584 goto done; 585 586 err: 587 ppb_wdtr(ppbus, 0); 588 lprintf("R"); 589 sc->sc_if.if_ierrors++; 590 sc->sc_iferrs++; 591 592 /* 593 * We are not able to send receive anything for now, 594 * so stop wasting our time 595 */ 596 if (sc->sc_iferrs > LPMAXERRS) { 597 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev)); 598 ppb_wctr(ppbus, 0x00); 599 sc->sc_if.if_flags &= ~IFF_RUNNING; 600 sc->sc_iferrs=0; 601 } 602 603 done: 604 splx(s); 605 return; 606 } 607 608 static __inline int 609 lpoutbyte (u_char byte, int spin, device_t ppbus) 610 { 611 ppb_wdtr(ppbus, txmith[byte]); 612 while (!(ppb_rstr(ppbus) & LPIP_SHAKE)) 613 if (--spin == 0) 614 return 1; 615 ppb_wdtr(ppbus, txmitl[byte]); 616 while (ppb_rstr(ppbus) & LPIP_SHAKE) 617 if (--spin == 0) 618 return 1; 619 return 0; 620 } 621 622 static int 623 lpoutput (struct ifnet *ifp, struct mbuf *m, 624 struct sockaddr *dst, struct rtentry *rt) 625 { 626 device_t dev = UNITODEVICE(ifp->if_unit); 627 device_t ppbus = device_get_parent(dev); 628 int s, err; 629 struct mbuf *mm; 630 u_char *cp = "\0\0"; 631 u_char chksum = 0; 632 int count = 0; 633 int i, len, spin; 634 635 /* We need a sensible value if we abort */ 636 cp++; 637 ifp->if_flags |= IFF_RUNNING; 638 639 err = 1; /* assume we're aborting because of an error */ 640 641 s = splhigh(); 642 643 /* Suspend (on laptops) or receive-errors might have taken us offline */ 644 ppb_wctr(ppbus, IRQENABLE); 645 646 if (ifp->if_flags & IFF_LINK0) { 647 648 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 649 lprintf("&"); 650 lp_intr(dev); 651 } 652 653 /* Alert other end to pending packet */ 654 spin = LPMAXSPIN1; 655 ppb_wdtr(ppbus, 0x08); 656 while ((ppb_rstr(ppbus) & 0x08) == 0) 657 if (--spin == 0) { 658 goto nend; 659 } 660 661 /* Calculate length of packet, then send that */ 662 663 count += 14; /* Ethernet header len */ 664 665 mm = m; 666 for (mm = m; mm; mm = mm->m_next) { 667 count += mm->m_len; 668 } 669 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus)) 670 goto nend; 671 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus)) 672 goto nend; 673 674 /* Send dummy ethernet header */ 675 for (i = 0; i < 12; i++) { 676 if (clpoutbyte(i, LPMAXSPIN1, ppbus)) 677 goto nend; 678 chksum += i; 679 } 680 681 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus)) 682 goto nend; 683 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus)) 684 goto nend; 685 chksum += 0x08 + 0x00; /* Add into checksum */ 686 687 mm = m; 688 do { 689 cp = mtod(mm, u_char *); 690 len = mm->m_len; 691 while (len--) { 692 chksum += *cp; 693 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 694 goto nend; 695 } 696 } while ((mm = mm->m_next)); 697 698 /* Send checksum */ 699 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus)) 700 goto nend; 701 702 /* Go quiescent */ 703 ppb_wdtr(ppbus, 0); 704 705 err = 0; /* No errors */ 706 707 nend: 708 if (err) { /* if we didn't timeout... */ 709 ifp->if_oerrors++; 710 lprintf("X"); 711 } else { 712 ifp->if_opackets++; 713 ifp->if_obytes += m->m_pkthdr.len; 714 if (ifp->if_bpf) 715 lptap(ifp, m); 716 } 717 718 m_freem(m); 719 720 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 721 lprintf("^"); 722 lp_intr(dev); 723 } 724 (void) splx(s); 725 return 0; 726 } 727 728 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 729 lprintf("&"); 730 lp_intr(dev); 731 } 732 733 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus)) 734 goto end; 735 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus)) 736 goto end; 737 738 mm = m; 739 do { 740 cp = mtod(mm,u_char *); 741 len = mm->m_len; 742 while (len--) 743 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 744 goto end; 745 } while ((mm = mm->m_next)); 746 747 err = 0; /* no errors were encountered */ 748 749 end: 750 --cp; 751 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17); 752 753 if (err) { /* if we didn't timeout... */ 754 ifp->if_oerrors++; 755 lprintf("X"); 756 } else { 757 ifp->if_opackets++; 758 ifp->if_obytes += m->m_pkthdr.len; 759 if (ifp->if_bpf) 760 lptap(ifp, m); 761 } 762 763 m_freem(m); 764 765 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 766 lprintf("^"); 767 lp_intr(dev); 768 } 769 770 (void) splx(s); 771 return 0; 772 } 773 774 static device_method_t lp_methods[] = { 775 /* device interface */ 776 DEVMETHOD(device_identify, lp_identify), 777 DEVMETHOD(device_probe, lp_probe), 778 DEVMETHOD(device_attach, lp_attach), 779 780 { 0, 0 } 781 }; 782 783 static driver_t lp_driver = { 784 "plip", 785 lp_methods, 786 sizeof(struct lp_data), 787 }; 788 789 DRIVER_MODULE(plip, ppbus, lp_driver, lp_devclass, 0, 0); 790