olpt.c revision 61116
1/* 2 * Copyright (c) 1990 William F. Jolitz, TeleMuse 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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This software is a component of "386BSD" developed by 16 * William F. Jolitz, TeleMuse. 17 * 4. Neither the name of the developer nor the name "386BSD" 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ 22 * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS 23 * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT. 24 * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT 25 * NOT MAKE USE OF THIS WORK. 26 * 27 * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED 28 * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN 29 * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES 30 * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING 31 * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND 32 * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE 33 * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS 34 * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992. 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND 37 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 39 * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE 40 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 41 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 42 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 44 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 45 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 46 * SUCH DAMAGE. 47 * 48 * from: unknown origin, 386BSD 0.1 49 * $FreeBSD: head/sys/pc98/cbus/olpt.c 61116 2000-05-31 10:51:53Z nyan $ 50 */ 51 52/* 53 * Device Driver for AT parallel printer port 54 * Written by William Jolitz 12/18/90 55 */ 56 57/* 58 * Parallel port TCP/IP interfaces added. I looked at the driver from 59 * MACH but this is a complete rewrite, and btw. incompatible, and it 60 * should perform better too. I have never run the MACH driver though. 61 * 62 * This driver sends two bytes (0x08, 0x00) in front of each packet, 63 * to allow us to distinguish another format later. 64 * 65 * Now added an Linux/Crynwr compatibility mode which is enabled using 66 * IF_LINK0 - Tim Wilkinson. 67 * 68 * TODO: 69 * Make HDLC/PPP mode, use IF_LLC1 to enable. 70 * 71 * Connect the two computers using a Laplink parallel cable to use this 72 * feature: 73 * 74 * +----------------------------------------+ 75 * |A-name A-End B-End Descr. Port/Bit | 76 * +----------------------------------------+ 77 * |DATA0 2 15 Data 0/0x01 | 78 * |-ERROR 15 2 1/0x08 | 79 * +----------------------------------------+ 80 * |DATA1 3 13 Data 0/0x02 | 81 * |+SLCT 13 3 1/0x10 | 82 * +----------------------------------------+ 83 * |DATA2 4 12 Data 0/0x04 | 84 * |+PE 12 4 1/0x20 | 85 * +----------------------------------------+ 86 * |DATA3 5 10 Strobe 0/0x08 | 87 * |-ACK 10 5 1/0x40 | 88 * +----------------------------------------+ 89 * |DATA4 6 11 Data 0/0x10 | 90 * |BUSY 11 6 1/~0x80 | 91 * +----------------------------------------+ 92 * |GND 18-25 18-25 GND - | 93 * +----------------------------------------+ 94 * 95 * Expect transfer-rates up to 75 kbyte/sec. 96 * 97 * If GCC could correctly grok 98 * register int port asm("edx") 99 * the code would be cleaner 100 * 101 * Poul-Henning Kamp <phk@freebsd.org> 102 */ 103 104#include "olpt.h" 105#include "opt_inet.h" 106#ifdef PC98 107#undef INET /* PLIP is not supported for old PC-98 */ 108#define LPT_DRVINIT_AT_ATTACH /* avoid conflicting with lpt on ppbus */ 109#endif 110 111#include <sys/param.h> 112#include <sys/systm.h> 113#include <sys/conf.h> 114#include <sys/bio.h> 115#include <sys/buf.h> 116#include <sys/bus.h> 117#include <sys/kernel.h> 118#include <sys/uio.h> 119#include <sys/syslog.h> 120#include <machine/clock.h> 121 122#include <i386/isa/isa_device.h> 123#include <i386/isa/lptreg.h> 124#include <dev/ppbus/lptio.h> 125 126#ifdef INET 127#include <sys/malloc.h> 128#include <sys/mbuf.h> 129#include <sys/socket.h> 130#include <sys/sockio.h> 131 132#include <net/if.h> 133#include <net/if_types.h> 134#include <net/netisr.h> 135#include <netinet/in.h> 136#include <netinet/in_var.h> 137#include <net/bpf.h> 138#endif /* INET */ 139 140#ifndef COMPAT_OLDISA 141#error "The olpt device requires the old isa compatibility shims" 142#endif 143 144#define LPINITRDY 4 /* wait up to 4 seconds for a ready */ 145#define LPTOUTINITIAL 10 /* initial timeout to wait for ready 1/10 s */ 146#define LPTOUTMAX 1 /* maximal timeout 1 s */ 147#define LPPRI (PZERO+8) 148#define BUFSIZE 1024 149 150#ifdef INET 151#ifndef LPMTU /* MTU for the lp# interfaces */ 152#define LPMTU 1500 153#endif 154 155#ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 156#define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 157#endif 158 159#ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 160#define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 161#endif 162 163#ifndef LPMAXERRS /* Max errors before !RUNNING */ 164#define LPMAXERRS 100 165#endif 166 167#define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 168#define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 169#define MLPIPHDRLEN CLPIPHDRLEN 170 171#define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 172#define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 173#if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 174#define MLPIPHDRLEN LPIPHDRLEN 175#endif 176 177#define LPIPTBLSIZE 256 /* Size of octet translation table */ 178 179#endif /* INET */ 180 181#ifndef PC98 182/* BIOS printer list - used by BIOS probe*/ 183#define BIOS_LPT_PORTS 0x408 184#define BIOS_PORTS (short *)(KERNBASE+BIOS_LPT_PORTS) 185#define BIOS_MAX_LPT 4 186#endif 187 188 189#ifndef DEBUG 190#define lprintf(args) 191#else 192#define lprintf(args) do { \ 193 if (lptflag) \ 194 printf args; \ 195 } while (0) 196static int volatile lptflag = 1; 197#endif 198 199#define LPTUNIT(s) ((s)&0x03) 200#define LPTFLAGS(s) ((s)&0xfc) 201 202static struct lpt_softc { 203 int sc_port; 204 short sc_state; 205 /* default case: negative prime, negative ack, handshake strobe, 206 prime once */ 207 u_char sc_control; 208 char sc_flags; 209#define LP_POS_INIT 0x04 /* if we are a postive init signal */ 210#define LP_POS_ACK 0x08 /* if we are a positive going ack */ 211#define LP_NO_PRIME 0x10 /* don't prime the printer at all */ 212#define LP_PRIMEOPEN 0x20 /* prime on every open */ 213#define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */ 214#define LP_BYPASS 0x80 /* bypass printer ready checks */ 215 struct buf *sc_inbuf; 216 short sc_xfercnt ; 217 char sc_primed; 218 char *sc_cp ; 219 u_char sc_irq ; /* IRQ status of port */ 220#define LP_HAS_IRQ 0x01 /* we have an irq available */ 221#define LP_USE_IRQ 0x02 /* we are using our irq */ 222#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */ 223 u_char sc_backoff ; /* time to call lptout() again */ 224 225#ifdef INET 226 struct ifnet sc_if; 227 u_char *sc_ifbuf; 228 int sc_iferrs; 229#endif 230} lpt_sc[NOLPT] ; 231 232/* bits for state */ 233#define OPEN (1<<0) /* device is open */ 234#define ASLP (1<<1) /* awaiting draining of printer */ 235#define ERROR (1<<2) /* error was received from printer */ 236#define OBUSY (1<<3) /* printer is busy doing output */ 237#define LPTOUT (1<<4) /* timeout while not selected */ 238#define TOUT (1<<5) /* timeout while not selected */ 239#define INIT (1<<6) /* waiting to initialize for open */ 240#define INTERRUPTED (1<<7) /* write call was interrupted */ 241 242 243/* status masks to interrogate printer status */ 244#define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */ 245#define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR) 246 247/* Printer Ready condition - from lpa.c */ 248/* Only used in polling code */ 249#ifdef PC98 250#define NOT_READY(x) ((inb(x) & LPS_NBSY) != LPS_NBSY) 251#else /* IBM-PC */ 252#define LPS_INVERT (LPS_NBSY | LPS_NACK | LPS_SEL | LPS_NERR) 253#define LPS_MASK (LPS_NBSY | LPS_NACK | LPS_OUT | LPS_SEL | LPS_NERR) 254#define NOT_READY(x) ((inb(x)^LPS_INVERT)&LPS_MASK) 255#endif 256 257#define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */ 258#define MAX_SPIN 20 /* Max delay for device ready in usecs */ 259 260static timeout_t lptout; 261static int lptprobe (struct isa_device *dvp); 262static int lptattach (struct isa_device *isdp); 263static ointhand2_t lptintr; 264static void lpt_drvinit(void *unused); 265 266#ifdef INET 267 268/* Tables for the lp# interface */ 269static u_char *txmith; 270#define txmitl (txmith+(1*LPIPTBLSIZE)) 271#define trecvh (txmith+(2*LPIPTBLSIZE)) 272#define trecvl (txmith+(3*LPIPTBLSIZE)) 273 274static u_char *ctxmith; 275#define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 276#define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 277#define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 278 279/* Functions for the lp# interface */ 280static void lpattach(struct lpt_softc *,int); 281#ifndef PC98 282static int lpinittables(void); 283#endif 284static int lpioctl(struct ifnet *, u_long, caddr_t); 285static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 286 struct rtentry *); 287static void lpintr(int); 288#endif /* INET */ 289 290struct isa_driver olptdriver = { 291 INTR_TYPE_TTY, 292 lptprobe, 293 lptattach, 294 "olpt" 295}; 296COMPAT_ISA_DRIVER(olpt, olptdriver); 297 298static d_open_t lptopen; 299static d_close_t lptclose; 300static d_write_t lptwrite; 301static d_ioctl_t lptioctl; 302 303#define CDEV_MAJOR 16 304static struct cdevsw lpt_cdevsw = { 305 /* open */ lptopen, 306 /* close */ lptclose, 307 /* read */ noread, 308 /* write */ lptwrite, 309 /* ioctl */ lptioctl, 310 /* poll */ nopoll, 311 /* mmap */ nommap, 312 /* strategy */ nostrategy, 313 /* name */ "lpt", 314 /* maj */ CDEV_MAJOR, 315 /* dump */ nodump, 316 /* psize */ nopsize, 317 /* flags */ 0, 318 /* bmaj */ -1 319}; 320 321#ifndef PC98 322/* 323 * Internal routine to lptprobe to do port tests of one byte value 324 */ 325static int 326lpt_port_test (int port, u_char data, u_char mask) 327{ 328 int temp, timeout; 329 330 data = data & mask; 331 outb(port, data); 332 timeout = 10000; 333 do { 334 DELAY(10); 335 temp = inb(port) & mask; 336 } 337 while (temp != data && --timeout); 338 lprintf(("Port 0x%x\tout=%x\tin=%x\ttout=%d\n", 339 port, data, temp, timeout)); 340 return (temp == data); 341} 342#endif /* PC98 */ 343 344/* 345 * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94 346 * Based partially on Rod Grimes' printer probe 347 * 348 * Logic: 349 * 1) If no port address was given, use the bios detected ports 350 * and autodetect what ports the printers are on. 351 * 2) Otherwise, probe the data port at the address given, 352 * using the method in Rod Grimes' port probe. 353 * (Much code ripped off directly from Rod's probe.) 354 * 355 * Comments from Rod's probe: 356 * Logic: 357 * 1) You should be able to write to and read back the same value 358 * to the data port. Do an alternating zeros, alternating ones, 359 * walking zero, and walking one test to check for stuck bits. 360 * 361 * 2) You should be able to write to and read back the same value 362 * to the control port lower 5 bits, the upper 3 bits are reserved 363 * per the IBM PC technical reference manauls and different boards 364 * do different things with them. Do an alternating zeros, alternating 365 * ones, walking zero, and walking one test to check for stuck bits. 366 * 367 * Some printers drag the strobe line down when the are powered off 368 * so this bit has been masked out of the control port test. 369 * 370 * XXX Some printers may not like a fast pulse on init or strobe, I 371 * don't know at this point, if that becomes a problem these bits 372 * should be turned off in the mask byte for the control port test. 373 * 374 * We are finally left with a mask of 0x14, due to some printers 375 * being adamant about holding other bits high ........ 376 * 377 * Before probing the control port, we write a 0 to the data port - 378 * If not, some printers chuck out garbage when the strobe line 379 * gets toggled. 380 * 381 * 3) Set the data and control ports to a value of 0 382 * 383 * This probe routine has been tested on Epson Lx-800, HP LJ3P, 384 * Epson FX-1170 and C.Itoh 8510RM 385 * printers. 386 * Quick exit on fail added. 387 */ 388 389int 390lptprobe(struct isa_device *dvp) 391{ 392#ifdef PC98 393#define PC98_OLD_LPT 0x40 394#define PC98_IEEE_1284_FUNCTION 0x149 395 unsigned int pc98_ieee_mode, tmp; 396 397 if (dvp->id_iobase == PC98_OLD_LPT) { 398 tmp = inb(PC98_IEEE_1284_FUNCTION); 399 pc98_ieee_mode = tmp; 400 if ((tmp & 0x10) == 0x10) { 401 outb(PC98_IEEE_1284_FUNCTION, tmp & ~0x10); 402 tmp = inb(PC98_IEEE_1284_FUNCTION); 403 if ((tmp & 0x10) != 0x10) { 404 outb(PC98_IEEE_1284_FUNCTION, pc98_ieee_mode); 405 return 0; 406 } 407 } 408 } 409 return 8; 410#else 411 int port; 412 static short next_bios_lpt = 0; 413 int status; 414 static u_char testbyte[18] = { 415 0x55, /* alternating zeros */ 416 0xaa, /* alternating ones */ 417 0xfe, 0xfd, 0xfb, 0xf7, 418 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */ 419 0x01, 0x02, 0x04, 0x08, 420 0x10, 0x20, 0x40, 0x80 /* walking one */ 421 }; 422 int i; 423 424 /* 425 * Make sure there is some way for lptopen to see that 426 * the port is not configured 427 * This 0 will remain if the port isn't attached 428 */ 429 (lpt_sc + dvp->id_unit)->sc_port = 0; 430 431 status = IO_LPTSIZE; 432 /* If port not specified, use bios list */ 433 if(dvp->id_iobase < 0) { /* port? */ 434 if((next_bios_lpt < BIOS_MAX_LPT) && 435 (*(BIOS_PORTS+next_bios_lpt) != 0) ) { 436 dvp->id_iobase = *(BIOS_PORTS+next_bios_lpt++); 437 goto end_probe; 438 } else 439 return (0); 440 } 441 442 /* Port was explicitly specified */ 443 /* This allows probing of ports unknown to the BIOS */ 444 port = dvp->id_iobase + lpt_data; 445 for (i = 0; i < 18; i++) { 446 if (!lpt_port_test(port, testbyte[i], 0xff)) { 447 status = 0; 448 goto end_probe; 449 } 450 } 451 452end_probe: 453 /* write 0's to control and data ports */ 454 outb(dvp->id_iobase+lpt_data, 0); 455 outb(dvp->id_iobase+lpt_control, 0); 456 457 return (status); 458#endif 459} 460 461/* XXX Todo - try and detect if interrupt is working */ 462int 463lptattach(struct isa_device *isdp) 464{ 465 struct lpt_softc *sc; 466 int unit; 467 468 isdp->id_ointr = lptintr; 469 unit = isdp->id_unit; 470 sc = lpt_sc + unit; 471 sc->sc_port = isdp->id_iobase; 472 sc->sc_primed = 0; /* not primed yet */ 473#ifdef PC98 474 outb(sc->sc_port+lpt_pstb_ctrl, LPC_DIS_PSTB); /* PSTB disable */ 475 outb(sc->sc_port+lpt_control, LPC_MODE8255); /* 8255 mode set */ 476 outb(sc->sc_port+lpt_control, LPC_NIRQ8); /* IRQ8 inactive */ 477 outb(sc->sc_port+lpt_control, LPC_NPSTB); /* PSTB inactive */ 478 outb(sc->sc_port+lpt_pstb_ctrl, LPC_EN_PSTB); /* PSTB enable */ 479#else 480 outb(sc->sc_port+lpt_control, LPC_NINIT); 481#endif 482 483 /* check if we can use interrupt */ 484 lprintf(("oldirq %x\n", sc->sc_irq)); 485 if (isdp->id_irq) { 486 sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ; 487 printf("lpt%d: Interrupt-driven port\n", unit); 488#ifdef INET 489 lpattach(sc, unit); 490#endif 491 } else { 492 sc->sc_irq = 0; 493 lprintf(("lpt%d: Polled port\n", unit)); 494 } 495 lprintf(("irq %x\n", sc->sc_irq)); 496 497 /* XXX what to do about the flags in the minor number? */ 498 make_dev(&lpt_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit); 499 make_dev(&lpt_cdevsw, unit | LP_BYPASS, 500 UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit); 501 502#ifdef LPT_DRVINIT_AT_ATTACH 503 lpt_drvinit(NULL); 504#endif 505 return (1); 506} 507 508/* 509 * lptopen -- reset the printer, then wait until it's selected and not busy. 510 * If LP_BYPASS flag is selected, then we do not try to select the 511 * printer -- this is just used for passing ioctls. 512 */ 513 514static int 515lptopen (dev_t dev, int flags, int fmt, struct proc *p) 516{ 517 struct lpt_softc *sc; 518 int s; 519#ifdef PC98 520 int port; 521#else 522 int trys, port; 523#endif 524 u_int unit = LPTUNIT(minor(dev)); 525 526 sc = lpt_sc + unit; 527 if ((unit >= NOLPT) || (sc->sc_port == 0)) 528 return (ENXIO); 529 530#ifdef INET 531 if (sc->sc_if.if_flags & IFF_UP) 532 return(EBUSY); 533#endif 534 535 if (sc->sc_state) { 536 lprintf(("lp: still open %x\n", sc->sc_state)); 537 return(EBUSY); 538 } else 539 sc->sc_state |= INIT; 540 541 sc->sc_flags = LPTFLAGS(minor(dev)); 542 543 /* Check for open with BYPASS flag set. */ 544 if (sc->sc_flags & LP_BYPASS) { 545 sc->sc_state = OPEN; 546 return(0); 547 } 548 549 s = spltty(); 550 lprintf(("lp flags 0x%x\n", sc->sc_flags)); 551 port = sc->sc_port; 552 553 /* set IRQ status according to ENABLE_IRQ flag */ 554 if (sc->sc_irq & LP_ENABLE_IRQ) 555 sc->sc_irq |= LP_USE_IRQ; 556 else 557 sc->sc_irq &= ~LP_USE_IRQ; 558 559 /* init printer */ 560#ifndef PC98 561 if ((sc->sc_flags & LP_NO_PRIME) == 0) { 562 if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) { 563 outb(port+lpt_control, 0); 564 sc->sc_primed++; 565 DELAY(500); 566 } 567 } 568 569 outb (port+lpt_control, LPC_SEL|LPC_NINIT); 570 571 /* wait till ready (printer running diagnostics) */ 572 trys = 0; 573 do { 574 /* ran out of waiting for the printer */ 575 if (trys++ >= LPINITRDY*4) { 576 splx(s); 577 sc->sc_state = 0; 578 lprintf(("status %x\n", inb(port+lpt_status))); 579 return (EBUSY); 580 } 581 582 /* wait 1/4 second, give up if we get a signal */ 583 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, "lptinit", hz/4) != 584 EWOULDBLOCK) { 585 sc->sc_state = 0; 586 splx(s); 587 return (EBUSY); 588 } 589 590 /* is printer online and ready for output */ 591 } while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 592 (LPS_SEL|LPS_NBSY|LPS_NERR)); 593 594 sc->sc_control = LPC_SEL|LPC_NINIT; 595 if (sc->sc_flags & LP_AUTOLF) 596 sc->sc_control |= LPC_AUTOL; 597 598 /* enable interrupt if interrupt-driven */ 599 if (sc->sc_irq & LP_USE_IRQ) 600 sc->sc_control |= LPC_ENA; 601 602 outb(port+lpt_control, sc->sc_control); 603#endif 604 605 sc->sc_state = OPEN; 606 sc->sc_inbuf = geteblk(BUFSIZE); 607 sc->sc_xfercnt = 0; 608 splx(s); 609 610 /* only use timeout if using interrupt */ 611 lprintf(("irq %x\n", sc->sc_irq)); 612 if (sc->sc_irq & LP_USE_IRQ) { 613 sc->sc_state |= TOUT; 614 timeout (lptout, (caddr_t)sc, 615 (sc->sc_backoff = hz/LPTOUTINITIAL)); 616 } 617 618 lprintf(("opened.\n")); 619 return(0); 620} 621 622static void 623lptout (void *arg) 624{ 625 struct lpt_softc *sc = arg; 626 int pl; 627 628 lprintf(("T %x ", inb(sc->sc_port+lpt_status))); 629 if (sc->sc_state & OPEN) { 630 sc->sc_backoff++; 631 if (sc->sc_backoff > hz/LPTOUTMAX) 632 sc->sc_backoff = sc->sc_backoff > hz/LPTOUTMAX; 633 timeout (lptout, (caddr_t)sc, sc->sc_backoff); 634 } else 635 sc->sc_state &= ~TOUT; 636 637 if (sc->sc_state & ERROR) 638 sc->sc_state &= ~ERROR; 639 640 /* 641 * Avoid possible hangs do to missed interrupts 642 */ 643 if (sc->sc_xfercnt) { 644 pl = spltty(); 645 lptintr(sc - lpt_sc); 646 splx(pl); 647 } else { 648 sc->sc_state &= ~OBUSY; 649 wakeup((caddr_t)sc); 650 } 651} 652 653/* 654 * lptclose -- close the device, free the local line buffer. 655 * 656 * Check for interrupted write call added. 657 */ 658 659static int 660lptclose(dev_t dev, int flags, int fmt, struct proc *p) 661{ 662 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 663#ifndef PC98 664 int port = sc->sc_port; 665#endif 666 667 if(sc->sc_flags & LP_BYPASS) 668 goto end_close; 669 670 sc->sc_state &= ~OPEN; 671 672#ifndef PC98 673 /* if the last write was interrupted, don't complete it */ 674 if((!(sc->sc_state & INTERRUPTED)) && (sc->sc_irq & LP_USE_IRQ)) 675 while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 676 (LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt) 677 /* wait 1/4 second, give up if we get a signal */ 678 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, 679 "lpclose", hz) != EWOULDBLOCK) 680 break; 681 682 outb(sc->sc_port+lpt_control, LPC_NINIT); 683#endif 684 brelse(sc->sc_inbuf); 685 686end_close: 687 sc->sc_state = 0; 688 sc->sc_xfercnt = 0; 689 lprintf(("closed.\n")); 690 return(0); 691} 692 693/* 694 * pushbytes() 695 * Workhorse for actually spinning and writing bytes to printer 696 * Derived from lpa.c 697 * Originally by ? 698 * 699 * This code is only used when we are polling the port 700 */ 701static int 702pushbytes(struct lpt_softc * sc) 703{ 704 int spin, err, tic; 705 char ch; 706 int port = sc->sc_port; 707 708 lprintf(("p")); 709 /* loop for every character .. */ 710 while (sc->sc_xfercnt > 0) { 711 /* printer data */ 712 ch = *(sc->sc_cp); 713 sc->sc_cp++; 714 sc->sc_xfercnt--; 715 716 /* 717 * Wait for printer ready. 718 * Loop 20 usecs testing BUSY bit, then sleep 719 * for exponentially increasing timeout. (vak) 720 */ 721 for (spin=0; NOT_READY(port+lpt_status) && spin<MAX_SPIN; ++spin) 722 DELAY(1); /* XXX delay is NOT this accurate! */ 723 if (spin >= MAX_SPIN) { 724 tic = 0; 725 while (NOT_READY(port+lpt_status)) { 726 /* 727 * Now sleep, every cycle a 728 * little longer .. 729 */ 730 tic = tic + tic + 1; 731 /* 732 * But no more than 10 seconds. (vak) 733 */ 734 if (tic > MAX_SLEEP) 735 tic = MAX_SLEEP; 736 err = tsleep((caddr_t)sc, LPPRI, 737 "lptpoll", tic); 738 if (err != EWOULDBLOCK) { 739 return (err); 740 } 741 } 742 } 743 744 /* output data */ 745 outb(port+lpt_data, ch); 746#ifdef PC98 747 DELAY(1); 748 outb(port+lpt_control, LPC_PSTB); 749 DELAY(1); 750 outb(port+lpt_control, LPC_NPSTB); 751#else 752 /* strobe */ 753 outb(port+lpt_control, sc->sc_control|LPC_STB); 754 outb(port+lpt_control, sc->sc_control); 755#endif 756 757 } 758 return(0); 759} 760 761/* 762 * lptwrite --copy a line from user space to a local buffer, then call 763 * putc to get the chars moved to the output queue. 764 * 765 * Flagging of interrupted write added. 766 */ 767 768static int 769lptwrite(dev_t dev, struct uio * uio, int ioflag) 770{ 771 register unsigned n; 772 int pl, err; 773 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 774 775 if(sc->sc_flags & LP_BYPASS) { 776 /* we can't do writes in bypass mode */ 777 return(EPERM); 778 } 779 780 sc->sc_state &= ~INTERRUPTED; 781 while ((n = min(BUFSIZE, uio->uio_resid)) != 0) { 782 sc->sc_cp = sc->sc_inbuf->b_data ; 783 uiomove(sc->sc_cp, n, uio); 784 sc->sc_xfercnt = n ; 785 while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) { 786 lprintf(("i")); 787 /* if the printer is ready for a char, */ 788 /* give it one */ 789 if ((sc->sc_state & OBUSY) == 0){ 790 lprintf(("\nC %d. ", sc->sc_xfercnt)); 791 pl = spltty(); 792 lptintr(sc - lpt_sc); 793 (void) splx(pl); 794 } 795 lprintf(("W ")); 796 if (sc->sc_state & OBUSY) 797 if ((err = tsleep ((caddr_t)sc, 798 LPPRI|PCATCH, "lpwrite", 0))) { 799 sc->sc_state |= INTERRUPTED; 800 return(err); 801 } 802 } 803 /* check to see if we must do a polled write */ 804 if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) { 805 lprintf(("p")); 806 if((err = pushbytes(sc))) 807 return(err); 808 } 809 } 810 return(0); 811} 812 813/* 814 * lptintr -- handle printer interrupts which occur when the printer is 815 * ready to accept another char. 816 * 817 * do checking for interrupted write call. 818 */ 819 820static void 821lptintr(int unit) 822{ 823#if defined(INET) || !defined(PC98) 824 struct lpt_softc *sc = lpt_sc + unit; 825#endif 826#ifndef PC98 827 int port = sc->sc_port, sts; 828 int i; 829#endif 830 831#ifdef INET 832 if(sc->sc_if.if_flags & IFF_UP) { 833 lpintr(unit); 834 return; 835 } 836#endif /* INET */ 837 838#ifndef PC98 839 /* 840 * Is printer online and ready for output? 841 * 842 * Avoid falling back to lptout() too quickly. First spin-loop 843 * to see if the printer will become ready ``really soon now''. 844 */ 845 for (i = 0; 846 i < 100 && 847 ((sts=inb(port+lpt_status)) & RDY_MASK) != LP_READY; 848 i++) ; 849 if ((sts & RDY_MASK) == LP_READY) { 850 sc->sc_state = (sc->sc_state | OBUSY) & ~ERROR; 851 sc->sc_backoff = hz/LPTOUTINITIAL; 852 853 if (sc->sc_xfercnt) { 854 /* send char */ 855 /*lprintf(("%x ", *sc->sc_cp)); */ 856 outb(port+lpt_data, *sc->sc_cp++) ; 857 outb(port+lpt_control, sc->sc_control|LPC_STB); 858 /* DELAY(X) */ 859 outb(port+lpt_control, sc->sc_control); 860 861 /* any more data for printer */ 862 if(--(sc->sc_xfercnt) > 0) return; 863 } 864 865 /* 866 * No more data waiting for printer. 867 * Wakeup is not done if write call was interrupted. 868 */ 869 sc->sc_state &= ~OBUSY; 870 if(!(sc->sc_state & INTERRUPTED)) 871 wakeup((caddr_t)sc); 872 lprintf(("w ")); 873 return; 874 } else { /* check for error */ 875 if(((sts & (LPS_NERR | LPS_OUT) ) != LPS_NERR) && 876 (sc->sc_state & OPEN)) 877 sc->sc_state |= ERROR; 878 /* lptout() will jump in and try to restart. */ 879 } 880#endif 881 lprintf(("sts %x ", sts)); 882} 883 884static int 885lptioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p) 886{ 887 int error = 0; 888 struct lpt_softc *sc; 889 u_int unit = LPTUNIT(minor(dev)); 890 u_char old_sc_irq; /* old printer IRQ status */ 891 892 sc = lpt_sc + unit; 893 894 switch (cmd) { 895 case LPT_IRQ : 896 if(sc->sc_irq & LP_HAS_IRQ) { 897 /* 898 * NOTE: 899 * If the IRQ status is changed, 900 * this will only be visible on the 901 * next open. 902 * 903 * If interrupt status changes, 904 * this gets syslog'd. 905 */ 906 old_sc_irq = sc->sc_irq; 907 if(*(int*)data == 0) 908 sc->sc_irq &= (~LP_ENABLE_IRQ); 909 else 910 sc->sc_irq |= LP_ENABLE_IRQ; 911 if (old_sc_irq != sc->sc_irq ) 912 log(LOG_NOTICE, "lpt%c switched to %s mode\n", 913 (char)unit+'0', 914 (sc->sc_irq & LP_ENABLE_IRQ)? 915 "interrupt-driven":"polled"); 916 } else /* polled port */ 917 error = EOPNOTSUPP; 918 break; 919 default: 920 error = ENODEV; 921 } 922 923 return(error); 924} 925 926#ifdef INET 927 928static void 929lpattach (struct lpt_softc *sc, int unit) 930{ 931 struct ifnet *ifp = &sc->sc_if; 932 933 ifp->if_softc = sc; 934 ifp->if_name = "lp"; 935 ifp->if_unit = unit; 936 ifp->if_mtu = LPMTU; 937 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 938 ifp->if_ioctl = lpioctl; 939 ifp->if_output = lpoutput; 940 ifp->if_type = IFT_PARA; 941 ifp->if_hdrlen = 0; 942 ifp->if_addrlen = 0; 943 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 944 if_attach(ifp); 945 printf("lp%d: TCP/IP capable interface\n", unit); 946 947 bpfattach(ifp, DLT_NULL, LPIPHDRLEN); 948} 949 950#ifndef PC98 951/* 952 * Build the translation tables for the LPIP (BSD unix) protocol. 953 * We don't want to calculate these nasties in our tight loop, so we 954 * precalculate them when we initialize. 955 */ 956static int 957lpinittables (void) 958{ 959 int i; 960 961 if (!txmith) 962 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 963 964 if (!txmith) 965 return 1; 966 967 if (!ctxmith) 968 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 969 970 if (!ctxmith) 971 return 1; 972 973 for (i=0; i < LPIPTBLSIZE; i++) { 974 ctxmith[i] = (i & 0xF0) >> 4; 975 ctxmitl[i] = 0x10 | (i & 0x0F); 976 ctrecvh[i] = (i & 0x78) << 1; 977 ctrecvl[i] = (i & 0x78) >> 3; 978 } 979 980 for (i=0; i < LPIPTBLSIZE; i++) { 981 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 982 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 983 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 984 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 985 } 986 987 return 0; 988} 989#endif /* PC98 */ 990 991/* 992 * Process an ioctl request. 993 */ 994 995static int 996lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 997{ 998 struct lpt_softc *sc = lpt_sc + ifp->if_unit; 999 struct ifaddr *ifa = (struct ifaddr *)data; 1000 struct ifreq *ifr = (struct ifreq *)data; 1001 u_char *ptr; 1002 1003 switch (cmd) { 1004 1005 case SIOCSIFDSTADDR: 1006 case SIOCAIFADDR: 1007 case SIOCSIFADDR: 1008 if (ifa->ifa_addr->sa_family != AF_INET) 1009 return EAFNOSUPPORT; 1010 ifp->if_flags |= IFF_UP; 1011 /* FALLTHROUGH */ 1012 case SIOCSIFFLAGS: 1013 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 1014 outb(sc->sc_port + lpt_control, 0x00); 1015 ifp->if_flags &= ~IFF_RUNNING; 1016 break; 1017 } 1018#ifdef PC98 1019 /* XXX */ 1020 return ENOBUFS; 1021#else 1022 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 1023 if (lpinittables()) 1024 return ENOBUFS; 1025 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 1026 M_DEVBUF, M_WAITOK); 1027 if (!sc->sc_ifbuf) 1028 return ENOBUFS; 1029 1030 outb(sc->sc_port + lpt_control, LPC_ENA); 1031 ifp->if_flags |= IFF_RUNNING; 1032 } 1033 break; 1034#endif 1035 case SIOCSIFMTU: 1036 ptr = sc->sc_ifbuf; 1037 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 1038 if (!sc->sc_ifbuf) { 1039 sc->sc_ifbuf = ptr; 1040 return ENOBUFS; 1041 } 1042 if (ptr) 1043 free(ptr,M_DEVBUF); 1044 sc->sc_if.if_mtu = ifr->ifr_mtu; 1045 break; 1046 1047 case SIOCGIFMTU: 1048 ifr->ifr_mtu = sc->sc_if.if_mtu; 1049 break; 1050 1051 case SIOCADDMULTI: 1052 case SIOCDELMULTI: 1053 if (ifr == 0) { 1054 return EAFNOSUPPORT; /* XXX */ 1055 } 1056 switch (ifr->ifr_addr.sa_family) { 1057 1058#ifdef INET 1059 case AF_INET: 1060 break; 1061#endif 1062 1063 default: 1064 return EAFNOSUPPORT; 1065 } 1066 break; 1067 1068 default: 1069 lprintf(("LP:ioctl(0x%lx)\n", cmd)); 1070 return EINVAL; 1071 } 1072 return 0; 1073} 1074 1075static __inline int 1076clpoutbyte (u_char byte, int spin, int data_port, int status_port) 1077{ 1078 outb(data_port, ctxmitl[byte]); 1079 while (inb(status_port) & CLPIP_SHAKE) 1080 if (--spin == 0) { 1081 return 1; 1082 } 1083 outb(data_port, ctxmith[byte]); 1084 while (!(inb(status_port) & CLPIP_SHAKE)) 1085 if (--spin == 0) { 1086 return 1; 1087 } 1088 return 0; 1089} 1090 1091static __inline int 1092clpinbyte (int spin, int data_port, int status_port) 1093{ 1094 int c, cl; 1095 1096 while((inb(status_port) & CLPIP_SHAKE)) 1097 if(!--spin) { 1098 return -1; 1099 } 1100 cl = inb(status_port); 1101 outb(data_port, 0x10); 1102 1103 while(!(inb(status_port) & CLPIP_SHAKE)) 1104 if(!--spin) { 1105 return -1; 1106 } 1107 c = inb(status_port); 1108 outb(data_port, 0x00); 1109 1110 return (ctrecvl[cl] | ctrecvh[c]); 1111} 1112 1113static void 1114lpintr (int unit) 1115{ 1116 struct lpt_softc *sc = lpt_sc + unit; 1117 register int lpt_data_port = sc->sc_port + lpt_data; 1118 register int lpt_stat_port = sc->sc_port + lpt_status; 1119 int lpt_ctrl_port = sc->sc_port + lpt_control; 1120 int len, s, j; 1121 u_char *bp; 1122 u_char c, cl; 1123 struct mbuf *top; 1124 1125 s = splhigh(); 1126 1127 if (sc->sc_if.if_flags & IFF_LINK0) { 1128 1129 /* Ack. the request */ 1130 outb(lpt_data_port, 0x01); 1131 1132 /* Get the packet length */ 1133 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1134 if (j == -1) 1135 goto err; 1136 len = j; 1137 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1138 if (j == -1) 1139 goto err; 1140 len = len + (j << 8); 1141 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 1142 goto err; 1143 1144 bp = sc->sc_ifbuf; 1145 1146 while (len--) { 1147 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1148 if (j == -1) { 1149 goto err; 1150 } 1151 *bp++ = j; 1152 } 1153 /* Get and ignore checksum */ 1154 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1155 if (j == -1) { 1156 goto err; 1157 } 1158 1159 len = bp - sc->sc_ifbuf; 1160 if (len <= CLPIPHDRLEN) 1161 goto err; 1162 1163 sc->sc_iferrs = 0; 1164 1165 if (IF_QFULL(&ipintrq)) { 1166 lprintf(("DROP")); 1167 IF_DROP(&ipintrq); 1168 goto done; 1169 } 1170 len -= CLPIPHDRLEN; 1171 sc->sc_if.if_ipackets++; 1172 sc->sc_if.if_ibytes += len; 1173 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 1174 if (top) { 1175 IF_ENQUEUE(&ipintrq, top); 1176 schednetisr(NETISR_IP); 1177 } 1178 goto done; 1179 } 1180 while ((inb(lpt_stat_port) & LPIP_SHAKE)) { 1181 len = sc->sc_if.if_mtu + LPIPHDRLEN; 1182 bp = sc->sc_ifbuf; 1183 while (len--) { 1184 1185 cl = inb(lpt_stat_port); 1186 outb(lpt_data_port, 8); 1187 1188 j = LPMAXSPIN2; 1189 while((inb(lpt_stat_port) & LPIP_SHAKE)) 1190 if(!--j) goto err; 1191 1192 c = inb(lpt_stat_port); 1193 outb(lpt_data_port, 0); 1194 1195 *bp++= trecvh[cl] | trecvl[c]; 1196 1197 j = LPMAXSPIN2; 1198 while (!((cl=inb(lpt_stat_port)) & LPIP_SHAKE)) { 1199 if (cl != c && 1200 (((cl = inb(lpt_stat_port)) ^ 0xb8) & 0xf8) == 1201 (c & 0xf8)) 1202 goto end; 1203 if (!--j) goto err; 1204 } 1205 } 1206 1207 end: 1208 len = bp - sc->sc_ifbuf; 1209 if (len <= LPIPHDRLEN) 1210 goto err; 1211 1212 sc->sc_iferrs = 0; 1213 1214 if (IF_QFULL(&ipintrq)) { 1215 lprintf(("DROP")); 1216 IF_DROP(&ipintrq); 1217 goto done; 1218 } 1219 if (sc->sc_if.if_bpf) { 1220 bpf_tap(&sc->sc_if, sc->sc_ifbuf, len); 1221 } 1222 len -= LPIPHDRLEN; 1223 sc->sc_if.if_ipackets++; 1224 sc->sc_if.if_ibytes += len; 1225 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 1226 if (top) { 1227 IF_ENQUEUE(&ipintrq, top); 1228 schednetisr(NETISR_IP); 1229 } 1230 } 1231 goto done; 1232 1233 err: 1234 outb(lpt_data_port, 0); 1235 lprintf(("R")); 1236 sc->sc_if.if_ierrors++; 1237 sc->sc_iferrs++; 1238 1239 /* 1240 * We are not able to send receive anything for now, 1241 * so stop wasting our time 1242 */ 1243 if (sc->sc_iferrs > LPMAXERRS) { 1244 printf("lp%d: Too many errors, Going off-line.\n", unit); 1245 outb(lpt_ctrl_port, 0x00); 1246 sc->sc_if.if_flags &= ~IFF_RUNNING; 1247 sc->sc_iferrs=0; 1248 } 1249 1250 done: 1251 splx(s); 1252 return; 1253} 1254 1255static __inline int 1256lpoutbyte (u_char byte, int spin, int data_port, int status_port) 1257{ 1258 outb(data_port, txmith[byte]); 1259 while (!(inb(status_port) & LPIP_SHAKE)) 1260 if (--spin == 0) 1261 return 1; 1262 outb(data_port, txmitl[byte]); 1263 while (inb(status_port) & LPIP_SHAKE) 1264 if (--spin == 0) 1265 return 1; 1266 return 0; 1267} 1268 1269static int 1270lpoutput (struct ifnet *ifp, struct mbuf *m, 1271 struct sockaddr *dst, struct rtentry *rt) 1272{ 1273 register int lpt_data_port = lpt_sc[ifp->if_unit].sc_port + lpt_data; 1274 register int lpt_stat_port = lpt_sc[ifp->if_unit].sc_port + lpt_status; 1275#ifndef PC98 1276 int lpt_ctrl_port = lpt_sc[ifp->if_unit].sc_port + lpt_control; 1277#endif 1278 1279 int s, err; 1280 struct mbuf *mm; 1281 u_char *cp = "\0\0"; 1282 u_char chksum = 0; 1283 int count = 0; 1284 int i; 1285 int spin; 1286 1287 /* We need a sensible value if we abort */ 1288 cp++; 1289 ifp->if_flags |= IFF_RUNNING; 1290 1291 err = 1; /* assume we're aborting because of an error */ 1292 1293 s = splhigh(); 1294 1295#ifndef PC98 1296 /* Suspend (on laptops) or receive-errors might have taken us offline */ 1297 outb(lpt_ctrl_port, LPC_ENA); 1298#endif 1299 1300 if (ifp->if_flags & IFF_LINK0) { 1301 1302 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1303 lprintf(("&")); 1304 lptintr(ifp->if_unit); 1305 } 1306 1307 /* Alert other end to pending packet */ 1308 spin = LPMAXSPIN1; 1309 outb(lpt_data_port, 0x08); 1310 while ((inb(lpt_stat_port) & 0x08) == 0) 1311 if (--spin == 0) { 1312 goto nend; 1313 } 1314 1315 /* Calculate length of packet, then send that */ 1316 1317 count += 14; /* Ethernet header len */ 1318 1319 mm = m; 1320 for (mm = m; mm; mm = mm->m_next) { 1321 count += mm->m_len; 1322 } 1323 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1324 goto nend; 1325 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1326 goto nend; 1327 1328 /* Send dummy ethernet header */ 1329 for (i = 0; i < 12; i++) { 1330 if (clpoutbyte(i, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1331 goto nend; 1332 chksum += i; 1333 } 1334 1335 if (clpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1336 goto nend; 1337 if (clpoutbyte(0x00, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1338 goto nend; 1339 chksum += 0x08 + 0x00; /* Add into checksum */ 1340 1341 mm = m; 1342 do { 1343 cp = mtod(mm, u_char *); 1344 while (mm->m_len--) { 1345 chksum += *cp; 1346 if (clpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1347 goto nend; 1348 } 1349 } while ((mm = mm->m_next)); 1350 1351 /* Send checksum */ 1352 if (clpoutbyte(chksum, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1353 goto nend; 1354 1355 /* Go quiescent */ 1356 outb(lpt_data_port, 0); 1357 1358 err = 0; /* No errors */ 1359 1360 nend: 1361 if (err) { /* if we didn't timeout... */ 1362 ifp->if_oerrors++; 1363 lprintf(("X")); 1364 } else { 1365 ifp->if_opackets++; 1366 ifp->if_obytes += m->m_pkthdr.len; 1367 } 1368 1369 m_freem(m); 1370 1371 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1372 lprintf(("^")); 1373 lptintr(ifp->if_unit); 1374 } 1375 (void) splx(s); 1376 return 0; 1377 } 1378 1379 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1380 lprintf(("&")); 1381 lptintr(ifp->if_unit); 1382 } 1383 1384 if (lpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1385 goto end; 1386 if (lpoutbyte(0x00, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1387 goto end; 1388 1389 mm = m; 1390 do { 1391 cp = mtod(mm,u_char *); 1392 while (mm->m_len--) 1393 if (lpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1394 goto end; 1395 } while ((mm = mm->m_next)); 1396 1397 err = 0; /* no errors were encountered */ 1398 1399 end: 1400 --cp; 1401 outb(lpt_data_port, txmitl[*cp] ^ 0x17); 1402 1403 if (err) { /* if we didn't timeout... */ 1404 ifp->if_oerrors++; 1405 lprintf(("X")); 1406 } else { 1407 ifp->if_opackets++; 1408 ifp->if_obytes += m->m_pkthdr.len; 1409 if (ifp->if_bpf) { 1410 /* 1411 * We need to prepend the packet type as 1412 * a two byte field. Cons up a dummy header 1413 * to pacify bpf. This is safe because bpf 1414 * will only read from the mbuf (i.e., it won't 1415 * try to free it or keep a pointer to it). 1416 */ 1417 struct mbuf m0; 1418 u_short hdr = 0x800; 1419 1420 m0.m_next = m; 1421 m0.m_len = 2; 1422 m0.m_data = (char *)&hdr; 1423 1424 bpf_mtap(ifp, &m0); 1425 } 1426 } 1427 1428 m_freem(m); 1429 1430 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1431 lprintf(("^")); 1432 lptintr(ifp->if_unit); 1433 } 1434 1435 (void) splx(s); 1436 return 0; 1437} 1438 1439#endif /* INET */ 1440 1441static int lpt_devsw_installed; 1442 1443static void lpt_drvinit(void *unused) 1444{ 1445 1446 if( ! lpt_devsw_installed ) { 1447 cdevsw_add(&lpt_cdevsw); 1448 lpt_devsw_installed = 1; 1449 } 1450} 1451#ifndef LPT_DRVINIT_AT_ATTACH 1452SYSINIT(lptdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,lpt_drvinit,NULL) 1453#endif 1454