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 1.2 2003/06/17 04:28:29 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 <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 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 ifp->if_name = "lp"; 240 ifp->if_unit = device_get_unit(dev); 241 ifp->if_mtu = LPMTU; 242 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 243 ifp->if_ioctl = lpioctl; 244 ifp->if_output = lpoutput; 245 ifp->if_type = IFT_PARA; 246 ifp->if_hdrlen = 0; 247 ifp->if_addrlen = 0; 248 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 249 if_attach(ifp); 250 251 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t)); 252 253 return (0); 254 } 255 /* 256 * Build the translation tables for the LPIP (BSD unix) protocol. 257 * We don't want to calculate these nasties in our tight loop, so we 258 * precalculate them when we initialize. 259 */ 260 static int 261 lpinittables (void) 262 { 263 int i; 264 265 if (!txmith) 266 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 267 268 if (!txmith) 269 return 1; 270 271 if (!ctxmith) 272 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 273 274 if (!ctxmith) 275 return 1; 276 277 for (i=0; i < LPIPTBLSIZE; i++) { 278 ctxmith[i] = (i & 0xF0) >> 4; 279 ctxmitl[i] = 0x10 | (i & 0x0F); 280 ctrecvh[i] = (i & 0x78) << 1; 281 ctrecvl[i] = (i & 0x78) >> 3; 282 } 283 284 for (i=0; i < LPIPTBLSIZE; i++) { 285 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 286 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 287 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 288 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 289 } 290 291 return 0; 292 } 293 294 /* 295 * Process an ioctl request. 296 */ 297 298 static int 299 lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 300 { 301 device_t dev = UNITODEVICE(ifp->if_unit); 302 device_t ppbus = device_get_parent(dev); 303 struct lp_data *sc = DEVTOSOFTC(dev); 304 struct ifaddr *ifa = (struct ifaddr *)data; 305 struct ifreq *ifr = (struct ifreq *)data; 306 u_char *ptr; 307 void *ih; 308 int error; 309 310 switch (cmd) { 311 312 case SIOCSIFDSTADDR: 313 case SIOCAIFADDR: 314 case SIOCSIFADDR: 315 if (ifa->ifa_addr->sa_family != AF_INET) 316 return EAFNOSUPPORT; 317 318 ifp->if_flags |= IFF_UP; 319 /* FALLTHROUGH */ 320 case SIOCSIFFLAGS: 321 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 322 323 ppb_wctr(ppbus, 0x00); 324 ifp->if_flags &= ~IFF_RUNNING; 325 326 /* IFF_UP is not set, try to release the bus anyway */ 327 ppb_release_bus(ppbus, dev); 328 break; 329 } 330 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 331 332 /* XXX 333 * Should the request be interruptible? 334 */ 335 if ((error = ppb_request_bus(ppbus, dev, PPB_WAIT|PPB_INTR))) 336 return (error); 337 338 /* Now IFF_UP means that we own the bus */ 339 340 ppb_set_mode(ppbus, PPB_COMPATIBLE); 341 342 if (lpinittables()) { 343 ppb_release_bus(ppbus, dev); 344 return ENOBUFS; 345 } 346 347 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 348 M_DEVBUF, M_WAITOK); 349 if (!sc->sc_ifbuf) { 350 ppb_release_bus(ppbus, dev); 351 return ENOBUFS; 352 } 353 354 /* attach our interrupt handler, later detached when the bus is released */ 355 if ((error = BUS_SETUP_INTR(ppbus, dev, sc->res_irq, 356 INTR_TYPE_NET, lp_intr, dev, &ih))) { 357 ppb_release_bus(ppbus, dev); 358 return (error); 359 } 360 361 ppb_wctr(ppbus, IRQENABLE); 362 ifp->if_flags |= IFF_RUNNING; 363 } 364 break; 365 366 case SIOCSIFMTU: 367 ptr = sc->sc_ifbuf; 368 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 369 if (!sc->sc_ifbuf) { 370 sc->sc_ifbuf = ptr; 371 return ENOBUFS; 372 } 373 if (ptr) 374 free(ptr,M_DEVBUF); 375 sc->sc_if.if_mtu = ifr->ifr_mtu; 376 break; 377 378 case SIOCGIFMTU: 379 ifr->ifr_mtu = sc->sc_if.if_mtu; 380 break; 381 382 case SIOCADDMULTI: 383 case SIOCDELMULTI: 384 if (ifr == 0) { 385 return EAFNOSUPPORT; /* XXX */ 386 } 387 switch (ifr->ifr_addr.sa_family) { 388 389 case AF_INET: 390 break; 391 392 default: 393 return EAFNOSUPPORT; 394 } 395 break; 396 397 case SIOCGIFMEDIA: 398 /* 399 * No ifmedia support at this stage; maybe use it 400 * in future for eg. protocol selection. 401 */ 402 return EINVAL; 403 404 default: 405 lprintf("LP:ioctl(0x%lx)\n", cmd); 406 return EINVAL; 407 } 408 return 0; 409 } 410 411 static __inline int 412 clpoutbyte (u_char byte, int spin, device_t ppbus) 413 { 414 ppb_wdtr(ppbus, ctxmitl[byte]); 415 while (ppb_rstr(ppbus) & CLPIP_SHAKE) 416 if (--spin == 0) { 417 return 1; 418 } 419 ppb_wdtr(ppbus, ctxmith[byte]); 420 while (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 421 if (--spin == 0) { 422 return 1; 423 } 424 return 0; 425 } 426 427 static __inline int 428 clpinbyte (int spin, device_t ppbus) 429 { 430 u_char c, cl; 431 432 while((ppb_rstr(ppbus) & CLPIP_SHAKE)) 433 if(!--spin) { 434 return -1; 435 } 436 cl = ppb_rstr(ppbus); 437 ppb_wdtr(ppbus, 0x10); 438 439 while(!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 440 if(!--spin) { 441 return -1; 442 } 443 c = ppb_rstr(ppbus); 444 ppb_wdtr(ppbus, 0x00); 445 446 return (ctrecvl[cl] | ctrecvh[c]); 447 } 448 449 static void 450 lptap(struct ifnet *ifp, struct mbuf *m) 451 { 452 /* 453 * Send a packet through bpf. We need to prepend the address family 454 * as a four byte field. Cons up a dummy header to pacify bpf. This 455 * is safe because bpf will only read from the mbuf (i.e., it won't 456 * try to free it or keep a pointer to it). 457 */ 458 u_int32_t af = AF_INET; 459 struct mbuf m0; 460 461 m0.m_next = m; 462 m0.m_len = sizeof(u_int32_t); 463 m0.m_data = (char *)⁡ 464 bpf_mtap(ifp, &m0); 465 } 466 467 static void 468 lp_intr (void *arg) 469 { 470 device_t dev = (device_t)arg; 471 device_t ppbus = device_get_parent(dev); 472 struct lp_data *sc = DEVTOSOFTC(dev); 473 int len, s, j; 474 u_char *bp; 475 u_char c, cl; 476 struct mbuf *top; 477 478 s = splhigh(); 479 480 if (sc->sc_if.if_flags & IFF_LINK0) { 481 482 /* Ack. the request */ 483 ppb_wdtr(ppbus, 0x01); 484 485 /* Get the packet length */ 486 j = clpinbyte(LPMAXSPIN2, ppbus); 487 if (j == -1) 488 goto err; 489 len = j; 490 j = clpinbyte(LPMAXSPIN2, ppbus); 491 if (j == -1) 492 goto err; 493 len = len + (j << 8); 494 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 495 goto err; 496 497 bp = sc->sc_ifbuf; 498 499 while (len--) { 500 j = clpinbyte(LPMAXSPIN2, ppbus); 501 if (j == -1) { 502 goto err; 503 } 504 *bp++ = j; 505 } 506 /* Get and ignore checksum */ 507 j = clpinbyte(LPMAXSPIN2, ppbus); 508 if (j == -1) { 509 goto err; 510 } 511 512 len = bp - sc->sc_ifbuf; 513 if (len <= CLPIPHDRLEN) 514 goto err; 515 516 sc->sc_iferrs = 0; 517 518 if (IF_QFULL(&ipintrq)) { 519 lprintf("DROP"); 520 IF_DROP(&ipintrq); 521 goto done; 522 } 523 len -= CLPIPHDRLEN; 524 sc->sc_if.if_ipackets++; 525 sc->sc_if.if_ibytes += len; 526 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 527 if (top) { 528 if (sc->sc_if.if_bpf) 529 lptap(&sc->sc_if, top); 530 IF_ENQUEUE(&ipintrq, top); 531 schednetisr(NETISR_IP); 532 } 533 goto done; 534 } 535 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) { 536 len = sc->sc_if.if_mtu + LPIPHDRLEN; 537 bp = sc->sc_ifbuf; 538 while (len--) { 539 540 cl = ppb_rstr(ppbus); 541 ppb_wdtr(ppbus, 8); 542 543 j = LPMAXSPIN2; 544 while((ppb_rstr(ppbus) & LPIP_SHAKE)) 545 if(!--j) goto err; 546 547 c = ppb_rstr(ppbus); 548 ppb_wdtr(ppbus, 0); 549 550 *bp++= trecvh[cl] | trecvl[c]; 551 552 j = LPMAXSPIN2; 553 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) { 554 if (cl != c && 555 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) == 556 (c & 0xf8)) 557 goto end; 558 if (!--j) goto err; 559 } 560 } 561 562 end: 563 len = bp - sc->sc_ifbuf; 564 if (len <= LPIPHDRLEN) 565 goto err; 566 567 sc->sc_iferrs = 0; 568 569 if (IF_QFULL(&ipintrq)) { 570 lprintf("DROP"); 571 IF_DROP(&ipintrq); 572 goto done; 573 } 574 len -= LPIPHDRLEN; 575 sc->sc_if.if_ipackets++; 576 sc->sc_if.if_ibytes += len; 577 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 578 if (top) { 579 if (sc->sc_if.if_bpf) 580 lptap(&sc->sc_if, top); 581 IF_ENQUEUE(&ipintrq, top); 582 schednetisr(NETISR_IP); 583 } 584 } 585 goto done; 586 587 err: 588 ppb_wdtr(ppbus, 0); 589 lprintf("R"); 590 sc->sc_if.if_ierrors++; 591 sc->sc_iferrs++; 592 593 /* 594 * We are not able to send receive anything for now, 595 * so stop wasting our time 596 */ 597 if (sc->sc_iferrs > LPMAXERRS) { 598 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev)); 599 ppb_wctr(ppbus, 0x00); 600 sc->sc_if.if_flags &= ~IFF_RUNNING; 601 sc->sc_iferrs=0; 602 } 603 604 done: 605 splx(s); 606 return; 607 } 608 609 static __inline int 610 lpoutbyte (u_char byte, int spin, device_t ppbus) 611 { 612 ppb_wdtr(ppbus, txmith[byte]); 613 while (!(ppb_rstr(ppbus) & LPIP_SHAKE)) 614 if (--spin == 0) 615 return 1; 616 ppb_wdtr(ppbus, txmitl[byte]); 617 while (ppb_rstr(ppbus) & LPIP_SHAKE) 618 if (--spin == 0) 619 return 1; 620 return 0; 621 } 622 623 static int 624 lpoutput (struct ifnet *ifp, struct mbuf *m, 625 struct sockaddr *dst, struct rtentry *rt) 626 { 627 device_t dev = UNITODEVICE(ifp->if_unit); 628 device_t ppbus = device_get_parent(dev); 629 int s, err; 630 struct mbuf *mm; 631 u_char *cp = "\0\0"; 632 u_char chksum = 0; 633 int count = 0; 634 int i, len, spin; 635 636 /* We need a sensible value if we abort */ 637 cp++; 638 ifp->if_flags |= IFF_RUNNING; 639 640 err = 1; /* assume we're aborting because of an error */ 641 642 s = splhigh(); 643 644 /* Suspend (on laptops) or receive-errors might have taken us offline */ 645 ppb_wctr(ppbus, IRQENABLE); 646 647 if (ifp->if_flags & IFF_LINK0) { 648 649 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 650 lprintf("&"); 651 lp_intr(dev); 652 } 653 654 /* Alert other end to pending packet */ 655 spin = LPMAXSPIN1; 656 ppb_wdtr(ppbus, 0x08); 657 while ((ppb_rstr(ppbus) & 0x08) == 0) 658 if (--spin == 0) { 659 goto nend; 660 } 661 662 /* Calculate length of packet, then send that */ 663 664 count += 14; /* Ethernet header len */ 665 666 mm = m; 667 for (mm = m; mm; mm = mm->m_next) { 668 count += mm->m_len; 669 } 670 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus)) 671 goto nend; 672 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus)) 673 goto nend; 674 675 /* Send dummy ethernet header */ 676 for (i = 0; i < 12; i++) { 677 if (clpoutbyte(i, LPMAXSPIN1, ppbus)) 678 goto nend; 679 chksum += i; 680 } 681 682 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus)) 683 goto nend; 684 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus)) 685 goto nend; 686 chksum += 0x08 + 0x00; /* Add into checksum */ 687 688 mm = m; 689 do { 690 cp = mtod(mm, u_char *); 691 len = mm->m_len; 692 while (len--) { 693 chksum += *cp; 694 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 695 goto nend; 696 } 697 } while ((mm = mm->m_next)); 698 699 /* Send checksum */ 700 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus)) 701 goto nend; 702 703 /* Go quiescent */ 704 ppb_wdtr(ppbus, 0); 705 706 err = 0; /* No errors */ 707 708 nend: 709 if (err) { /* if we didn't timeout... */ 710 ifp->if_oerrors++; 711 lprintf("X"); 712 } else { 713 ifp->if_opackets++; 714 ifp->if_obytes += m->m_pkthdr.len; 715 if (ifp->if_bpf) 716 lptap(ifp, m); 717 } 718 719 m_freem(m); 720 721 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 722 lprintf("^"); 723 lp_intr(dev); 724 } 725 (void) splx(s); 726 return 0; 727 } 728 729 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 730 lprintf("&"); 731 lp_intr(dev); 732 } 733 734 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus)) 735 goto end; 736 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus)) 737 goto end; 738 739 mm = m; 740 do { 741 cp = mtod(mm,u_char *); 742 len = mm->m_len; 743 while (len--) 744 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 745 goto end; 746 } while ((mm = mm->m_next)); 747 748 err = 0; /* no errors were encountered */ 749 750 end: 751 --cp; 752 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17); 753 754 if (err) { /* if we didn't timeout... */ 755 ifp->if_oerrors++; 756 lprintf("X"); 757 } else { 758 ifp->if_opackets++; 759 ifp->if_obytes += m->m_pkthdr.len; 760 if (ifp->if_bpf) 761 lptap(ifp, m); 762 } 763 764 m_freem(m); 765 766 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 767 lprintf("^"); 768 lp_intr(dev); 769 } 770 771 (void) splx(s); 772 return 0; 773 } 774 775 static device_method_t lp_methods[] = { 776 /* device interface */ 777 DEVMETHOD(device_identify, lp_identify), 778 DEVMETHOD(device_probe, lp_probe), 779 DEVMETHOD(device_attach, lp_attach), 780 781 { 0, 0 } 782 }; 783 784 static driver_t lp_driver = { 785 "plip", 786 lp_methods, 787 sizeof(struct lp_data), 788 }; 789 790 DRIVER_MODULE(plip, ppbus, lp_driver, lp_devclass, 0, 0); 791