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_ifp; 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 device_t dev; 187 188 dev = device_find_child(parent, "plip", -1); 189 if (!dev) 190 BUS_ADD_CHILD(parent, 0, "plip", -1); 191 } 192 /* 193 * lpprobe() 194 */ 195 static int 196 lp_probe(device_t dev) 197 { 198 device_t ppbus = device_get_parent(dev); 199 struct lp_data *lp; 200 int zero = 0; 201 uintptr_t irq; 202 203 lp = DEVTOSOFTC(dev); 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 */ 225 226 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; 236 237 ifp = lp->sc_ifp = if_alloc(IFT_PARA); 238 if (ifp == NULL) { 239 return (ENOSPC); 240 } 241 242 ifp->if_softc = lp; 243 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 244 ifp->if_mtu = LPMTU; 245 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST | 246 IFF_NEEDSGIANT; 247 ifp->if_ioctl = lpioctl; 248 ifp->if_output = lpoutput; 249 ifp->if_hdrlen = 0; 250 ifp->if_addrlen = 0; 251 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 252 if_attach(ifp); 253 254 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t)); 255 256 return (0); 257 } 258 /* 259 * Build the translation tables for the LPIP (BSD unix) protocol. 260 * We don't want to calculate these nasties in our tight loop, so we 261 * precalculate them when we initialize. 262 */ 263 static int 264 lpinittables (void) 265 { 266 int i; 267 268 if (!txmith) 269 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 270 271 if (!txmith) 272 return 1; 273 274 if (!ctxmith) 275 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 276 277 if (!ctxmith) 278 return 1; 279 280 for (i=0; i < LPIPTBLSIZE; i++) { 281 ctxmith[i] = (i & 0xF0) >> 4; 282 ctxmitl[i] = 0x10 | (i & 0x0F); 283 ctrecvh[i] = (i & 0x78) << 1; 284 ctrecvl[i] = (i & 0x78) >> 3; 285 } 286 287 for (i=0; i < LPIPTBLSIZE; i++) { 288 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 289 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 290 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 291 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 292 } 293 294 return 0; 295 } 296 297 /* 298 * Process an ioctl request. 299 */ 300 301 static int 302 lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 303 { 304 device_t dev = UNITODEVICE(ifp->if_dunit); 305 device_t ppbus = device_get_parent(dev); 306 struct lp_data *sc = DEVTOSOFTC(dev); 307 struct ifaddr *ifa = (struct ifaddr *)data; 308 struct ifreq *ifr = (struct ifreq *)data; 309 u_char *ptr; 310 void *ih; 311 int error; 312 313 switch (cmd) { 314 315 case SIOCSIFDSTADDR: 316 case SIOCAIFADDR: 317 case SIOCSIFADDR: 318 if (ifa->ifa_addr->sa_family != AF_INET) 319 return EAFNOSUPPORT; 320 321 ifp->if_flags |= IFF_UP; 322 /* FALLTHROUGH */ 323 case SIOCSIFFLAGS: 324 if ((!(ifp->if_flags & IFF_UP)) && 325 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 326 327 ppb_wctr(ppbus, 0x00); 328 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 329 330 /* IFF_UP is not set, try to release the bus anyway */ 331 ppb_release_bus(ppbus, dev); 332 break; 333 } 334 if (((ifp->if_flags & IFF_UP)) && 335 (!(ifp->if_drv_flags & IFF_DRV_RUNNING))) { 336 337 /* XXX 338 * Should the request be interruptible? 339 */ 340 if ((error = ppb_request_bus(ppbus, dev, PPB_WAIT|PPB_INTR))) 341 return (error); 342 343 /* Now IFF_UP means that we own the bus */ 344 345 ppb_set_mode(ppbus, PPB_COMPATIBLE); 346 347 if (lpinittables()) { 348 ppb_release_bus(ppbus, dev); 349 return ENOBUFS; 350 } 351 352 sc->sc_ifbuf = malloc(sc->sc_ifp->if_mtu + MLPIPHDRLEN, 353 M_DEVBUF, M_WAITOK); 354 if (!sc->sc_ifbuf) { 355 ppb_release_bus(ppbus, dev); 356 return ENOBUFS; 357 } 358 359 /* attach our interrupt handler, later detached when the bus is released */ 360 if ((error = bus_setup_intr(dev, sc->res_irq, 361 INTR_TYPE_NET, lp_intr, dev, &ih))) { 362 ppb_release_bus(ppbus, dev); 363 return (error); 364 } 365 366 ppb_wctr(ppbus, IRQENABLE); 367 ifp->if_drv_flags |= IFF_DRV_RUNNING; 368 } 369 break; 370 371 case SIOCSIFMTU: 372 ptr = sc->sc_ifbuf; 373 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 374 if (!sc->sc_ifbuf) { 375 sc->sc_ifbuf = ptr; 376 return ENOBUFS; 377 } 378 if (ptr) 379 free(ptr,M_DEVBUF); 380 sc->sc_ifp->if_mtu = ifr->ifr_mtu; 381 break; 382 383 case SIOCGIFMTU: 384 ifr->ifr_mtu = sc->sc_ifp->if_mtu; 385 break; 386 387 case SIOCADDMULTI: 388 case SIOCDELMULTI: 389 if (ifr == 0) { 390 return EAFNOSUPPORT; /* XXX */ 391 } 392 switch (ifr->ifr_addr.sa_family) { 393 394 case AF_INET: 395 break; 396 397 default: 398 return EAFNOSUPPORT; 399 } 400 break; 401 402 case SIOCGIFMEDIA: 403 /* 404 * No ifmedia support at this stage; maybe use it 405 * in future for eg. protocol selection. 406 */ 407 return EINVAL; 408 409 default: 410 lprintf("LP:ioctl(0x%lx)\n", cmd); 411 return EINVAL; 412 } 413 return 0; 414 } 415 416 static __inline int 417 clpoutbyte (u_char byte, int spin, device_t ppbus) 418 { 419 ppb_wdtr(ppbus, ctxmitl[byte]); 420 while (ppb_rstr(ppbus) & CLPIP_SHAKE) 421 if (--spin == 0) { 422 return 1; 423 } 424 ppb_wdtr(ppbus, ctxmith[byte]); 425 while (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 426 if (--spin == 0) { 427 return 1; 428 } 429 return 0; 430 } 431 432 static __inline int 433 clpinbyte (int spin, device_t ppbus) 434 { 435 u_char c, cl; 436 437 while((ppb_rstr(ppbus) & CLPIP_SHAKE)) 438 if(!--spin) { 439 return -1; 440 } 441 cl = ppb_rstr(ppbus); 442 ppb_wdtr(ppbus, 0x10); 443 444 while(!(ppb_rstr(ppbus) & CLPIP_SHAKE)) 445 if(!--spin) { 446 return -1; 447 } 448 c = ppb_rstr(ppbus); 449 ppb_wdtr(ppbus, 0x00); 450 451 return (ctrecvl[cl] | ctrecvh[c]); 452 } 453 454 static void 455 lptap(struct ifnet *ifp, struct mbuf *m) 456 { 457 u_int32_t af = AF_INET; 458 BPF_MTAP2(ifp, &af, sizeof(af), m); 459 } 460 461 static void 462 lp_intr (void *arg) 463 { 464 device_t dev = (device_t)arg; 465 device_t ppbus = device_get_parent(dev); 466 struct lp_data *sc = DEVTOSOFTC(dev); 467 int len, s, j; 468 u_char *bp; 469 u_char c, cl; 470 struct mbuf *top; 471 472 s = splhigh(); 473 474 if (sc->sc_ifp->if_flags & IFF_LINK0) { 475 476 /* Ack. the request */ 477 ppb_wdtr(ppbus, 0x01); 478 479 /* Get the packet length */ 480 j = clpinbyte(LPMAXSPIN2, ppbus); 481 if (j == -1) 482 goto err; 483 len = j; 484 j = clpinbyte(LPMAXSPIN2, ppbus); 485 if (j == -1) 486 goto err; 487 len = len + (j << 8); 488 if (len > sc->sc_ifp->if_mtu + MLPIPHDRLEN) 489 goto err; 490 491 bp = sc->sc_ifbuf; 492 493 while (len--) { 494 j = clpinbyte(LPMAXSPIN2, ppbus); 495 if (j == -1) { 496 goto err; 497 } 498 *bp++ = j; 499 } 500 /* Get and ignore checksum */ 501 j = clpinbyte(LPMAXSPIN2, ppbus); 502 if (j == -1) { 503 goto err; 504 } 505 506 len = bp - sc->sc_ifbuf; 507 if (len <= CLPIPHDRLEN) 508 goto err; 509 510 sc->sc_iferrs = 0; 511 512 len -= CLPIPHDRLEN; 513 sc->sc_ifp->if_ipackets++; 514 sc->sc_ifp->if_ibytes += len; 515 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, sc->sc_ifp, 0); 516 if (top) { 517 if (sc->sc_ifp->if_bpf) 518 lptap(sc->sc_ifp, top); 519 netisr_queue(NETISR_IP, top); /* mbuf is free'd on failure. */ 520 } 521 goto done; 522 } 523 while ((ppb_rstr(ppbus) & LPIP_SHAKE)) { 524 len = sc->sc_ifp->if_mtu + LPIPHDRLEN; 525 bp = sc->sc_ifbuf; 526 while (len--) { 527 528 cl = ppb_rstr(ppbus); 529 ppb_wdtr(ppbus, 8); 530 531 j = LPMAXSPIN2; 532 while((ppb_rstr(ppbus) & LPIP_SHAKE)) 533 if(!--j) goto err; 534 535 c = ppb_rstr(ppbus); 536 ppb_wdtr(ppbus, 0); 537 538 *bp++= trecvh[cl] | trecvl[c]; 539 540 j = LPMAXSPIN2; 541 while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) { 542 if (cl != c && 543 (((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) == 544 (c & 0xf8)) 545 goto end; 546 if (!--j) goto err; 547 } 548 } 549 550 end: 551 len = bp - sc->sc_ifbuf; 552 if (len <= LPIPHDRLEN) 553 goto err; 554 555 sc->sc_iferrs = 0; 556 557 len -= LPIPHDRLEN; 558 sc->sc_ifp->if_ipackets++; 559 sc->sc_ifp->if_ibytes += len; 560 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, sc->sc_ifp, 0); 561 if (top) { 562 if (sc->sc_ifp->if_bpf) 563 lptap(sc->sc_ifp, top); 564 netisr_queue(NETISR_IP, top); /* mbuf is free'd on failure. */ 565 } 566 } 567 goto done; 568 569 err: 570 ppb_wdtr(ppbus, 0); 571 lprintf("R"); 572 sc->sc_ifp->if_ierrors++; 573 sc->sc_iferrs++; 574 575 /* 576 * We are not able to send receive anything for now, 577 * so stop wasting our time 578 */ 579 if (sc->sc_iferrs > LPMAXERRS) { 580 printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev)); 581 ppb_wctr(ppbus, 0x00); 582 sc->sc_ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 583 sc->sc_iferrs=0; 584 } 585 586 done: 587 splx(s); 588 return; 589 } 590 591 static __inline int 592 lpoutbyte (u_char byte, int spin, device_t ppbus) 593 { 594 ppb_wdtr(ppbus, txmith[byte]); 595 while (!(ppb_rstr(ppbus) & LPIP_SHAKE)) 596 if (--spin == 0) 597 return 1; 598 ppb_wdtr(ppbus, txmitl[byte]); 599 while (ppb_rstr(ppbus) & LPIP_SHAKE) 600 if (--spin == 0) 601 return 1; 602 return 0; 603 } 604 605 static int 606 lpoutput (struct ifnet *ifp, struct mbuf *m, 607 struct sockaddr *dst, struct rtentry *rt) 608 { 609 device_t dev = UNITODEVICE(ifp->if_dunit); 610 device_t ppbus = device_get_parent(dev); 611 int s, err; 612 struct mbuf *mm; 613 u_char *cp = "\0\0"; 614 u_char chksum = 0; 615 int count = 0; 616 int i, len, spin; 617 618 /* We need a sensible value if we abort */ 619 cp++; 620 ifp->if_drv_flags |= IFF_DRV_RUNNING; 621 622 err = 1; /* assume we're aborting because of an error */ 623 624 s = splhigh(); 625 626 /* Suspend (on laptops) or receive-errors might have taken us offline */ 627 ppb_wctr(ppbus, IRQENABLE); 628 629 if (ifp->if_flags & IFF_LINK0) { 630 631 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 632 lprintf("&"); 633 lp_intr(dev); 634 } 635 636 /* Alert other end to pending packet */ 637 spin = LPMAXSPIN1; 638 ppb_wdtr(ppbus, 0x08); 639 while ((ppb_rstr(ppbus) & 0x08) == 0) 640 if (--spin == 0) { 641 goto nend; 642 } 643 644 /* Calculate length of packet, then send that */ 645 646 count += 14; /* Ethernet header len */ 647 648 mm = m; 649 for (mm = m; mm; mm = mm->m_next) { 650 count += mm->m_len; 651 } 652 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus)) 653 goto nend; 654 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus)) 655 goto nend; 656 657 /* Send dummy ethernet header */ 658 for (i = 0; i < 12; i++) { 659 if (clpoutbyte(i, LPMAXSPIN1, ppbus)) 660 goto nend; 661 chksum += i; 662 } 663 664 if (clpoutbyte(0x08, LPMAXSPIN1, ppbus)) 665 goto nend; 666 if (clpoutbyte(0x00, LPMAXSPIN1, ppbus)) 667 goto nend; 668 chksum += 0x08 + 0x00; /* Add into checksum */ 669 670 mm = m; 671 do { 672 cp = mtod(mm, u_char *); 673 len = mm->m_len; 674 while (len--) { 675 chksum += *cp; 676 if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 677 goto nend; 678 } 679 } while ((mm = mm->m_next)); 680 681 /* Send checksum */ 682 if (clpoutbyte(chksum, LPMAXSPIN2, ppbus)) 683 goto nend; 684 685 /* Go quiescent */ 686 ppb_wdtr(ppbus, 0); 687 688 err = 0; /* No errors */ 689 690 nend: 691 if (err) { /* if we didn't timeout... */ 692 ifp->if_oerrors++; 693 lprintf("X"); 694 } else { 695 ifp->if_opackets++; 696 ifp->if_obytes += m->m_pkthdr.len; 697 if (ifp->if_bpf) 698 lptap(ifp, m); 699 } 700 701 m_freem(m); 702 703 if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) { 704 lprintf("^"); 705 lp_intr(dev); 706 } 707 (void) splx(s); 708 return 0; 709 } 710 711 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 712 lprintf("&"); 713 lp_intr(dev); 714 } 715 716 if (lpoutbyte(0x08, LPMAXSPIN1, ppbus)) 717 goto end; 718 if (lpoutbyte(0x00, LPMAXSPIN2, ppbus)) 719 goto end; 720 721 mm = m; 722 do { 723 cp = mtod(mm,u_char *); 724 len = mm->m_len; 725 while (len--) 726 if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus)) 727 goto end; 728 } while ((mm = mm->m_next)); 729 730 err = 0; /* no errors were encountered */ 731 732 end: 733 --cp; 734 ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17); 735 736 if (err) { /* if we didn't timeout... */ 737 ifp->if_oerrors++; 738 lprintf("X"); 739 } else { 740 ifp->if_opackets++; 741 ifp->if_obytes += m->m_pkthdr.len; 742 if (ifp->if_bpf) 743 lptap(ifp, m); 744 } 745 746 m_freem(m); 747 748 if (ppb_rstr(ppbus) & LPIP_SHAKE) { 749 lprintf("^"); 750 lp_intr(dev); 751 } 752 753 (void) splx(s); 754 return 0; 755 } 756 757 static device_method_t lp_methods[] = { 758 /* device interface */ 759 DEVMETHOD(device_identify, lp_identify), 760 DEVMETHOD(device_probe, lp_probe), 761 DEVMETHOD(device_attach, lp_attach), 762 763 { 0, 0 } 764 }; 765 766 static driver_t lp_driver = { 767 "plip", 768 lp_methods, 769 sizeof(struct lp_data), 770 }; 771 772 DRIVER_MODULE(plip, ppbus, lp_driver, lp_devclass, 0, 0); 773 MODULE_DEPEND(plip, ppbus, 1, 1, 1); 774