olpt.c revision 69152
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 69152 2000-11-25 07:35:38Z jlemon $ 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> 120 121#include <i386/isa/isa_device.h> 122#include <i386/isa/lptreg.h> 123#include <dev/ppbus/lptio.h> 124 125#ifdef INET 126#include <sys/malloc.h> 127#include <sys/mbuf.h> 128#include <sys/socket.h> 129#include <sys/sockio.h> 130 131#include <net/if.h> 132#include <net/if_types.h> 133#include <net/netisr.h> 134#include <netinet/in.h> 135#include <netinet/in_var.h> 136#include <net/bpf.h> 137#endif /* INET */ 138 139#ifndef COMPAT_OLDISA 140#error "The olpt device requires the old isa compatibility shims" 141#endif 142 143#define LPINITRDY 4 /* wait up to 4 seconds for a ready */ 144#define LPTOUTINITIAL 10 /* initial timeout to wait for ready 1/10 s */ 145#define LPTOUTMAX 1 /* maximal timeout 1 s */ 146#define LPPRI (PZERO+8) 147#define BUFSIZE 1024 148 149#ifdef INET 150#ifndef LPMTU /* MTU for the lp# interfaces */ 151#define LPMTU 1500 152#endif 153 154#ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 155#define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 156#endif 157 158#ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 159#define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 160#endif 161 162#ifndef LPMAXERRS /* Max errors before !RUNNING */ 163#define LPMAXERRS 100 164#endif 165 166#define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 167#define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 168#define MLPIPHDRLEN CLPIPHDRLEN 169 170#define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 171#define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 172#if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 173#define MLPIPHDRLEN LPIPHDRLEN 174#endif 175 176#define LPIPTBLSIZE 256 /* Size of octet translation table */ 177 178#endif /* INET */ 179 180#ifndef PC98 181/* BIOS printer list - used by BIOS probe*/ 182#define BIOS_LPT_PORTS 0x408 183#define BIOS_PORTS (short *)(KERNBASE+BIOS_LPT_PORTS) 184#define BIOS_MAX_LPT 4 185#endif 186 187 188#ifndef DEBUG 189#define lprintf(args) 190#else 191#define lprintf(args) do { \ 192 if (lptflag) \ 193 printf args; \ 194 } while (0) 195static int volatile lptflag = 1; 196#endif 197 198#define LPTUNIT(s) ((s)&0x03) 199#define LPTFLAGS(s) ((s)&0xfc) 200 201static struct lpt_softc { 202 int sc_port; 203 short sc_state; 204 /* default case: negative prime, negative ack, handshake strobe, 205 prime once */ 206 u_char sc_control; 207 char sc_flags; 208#define LP_POS_INIT 0x04 /* if we are a postive init signal */ 209#define LP_POS_ACK 0x08 /* if we are a positive going ack */ 210#define LP_NO_PRIME 0x10 /* don't prime the printer at all */ 211#define LP_PRIMEOPEN 0x20 /* prime on every open */ 212#define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */ 213#define LP_BYPASS 0x80 /* bypass printer ready checks */ 214 struct buf *sc_inbuf; 215 short sc_xfercnt ; 216 char sc_primed; 217 char *sc_cp ; 218 u_char sc_irq ; /* IRQ status of port */ 219#define LP_HAS_IRQ 0x01 /* we have an irq available */ 220#define LP_USE_IRQ 0x02 /* we are using our irq */ 221#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */ 222 u_char sc_backoff ; /* time to call lptout() again */ 223 224#ifdef INET 225 struct ifnet sc_if; 226 u_char *sc_ifbuf; 227 int sc_iferrs; 228#endif 229} lpt_sc[NOLPT] ; 230 231/* bits for state */ 232#define OPEN (1<<0) /* device is open */ 233#define ASLP (1<<1) /* awaiting draining of printer */ 234#define ERROR (1<<2) /* error was received from printer */ 235#define OBUSY (1<<3) /* printer is busy doing output */ 236#define LPTOUT (1<<4) /* timeout while not selected */ 237#define TOUT (1<<5) /* timeout while not selected */ 238#define INIT (1<<6) /* waiting to initialize for open */ 239#define INTERRUPTED (1<<7) /* write call was interrupted */ 240 241 242/* status masks to interrogate printer status */ 243#define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */ 244#define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR) 245 246/* Printer Ready condition - from lpa.c */ 247/* Only used in polling code */ 248#ifdef PC98 249#define NOT_READY(x) ((inb(x) & LPS_NBSY) != LPS_NBSY) 250#else /* IBM-PC */ 251#define LPS_INVERT (LPS_NBSY | LPS_NACK | LPS_SEL | LPS_NERR) 252#define LPS_MASK (LPS_NBSY | LPS_NACK | LPS_OUT | LPS_SEL | LPS_NERR) 253#define NOT_READY(x) ((inb(x)^LPS_INVERT)&LPS_MASK) 254#endif 255 256#define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */ 257#define MAX_SPIN 20 /* Max delay for device ready in usecs */ 258 259static timeout_t lptout; 260static int lptprobe (struct isa_device *dvp); 261static int lptattach (struct isa_device *isdp); 262static ointhand2_t lptintr; 263static void lpt_drvinit(void *unused); 264 265#ifdef INET 266 267/* Tables for the lp# interface */ 268static u_char *txmith; 269#define txmitl (txmith+(1*LPIPTBLSIZE)) 270#define trecvh (txmith+(2*LPIPTBLSIZE)) 271#define trecvl (txmith+(3*LPIPTBLSIZE)) 272 273static u_char *ctxmith; 274#define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 275#define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 276#define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 277 278/* Functions for the lp# interface */ 279static void lpattach(struct lpt_softc *,int); 280#ifndef PC98 281static int lpinittables(void); 282#endif 283static int lpioctl(struct ifnet *, u_long, caddr_t); 284static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 285 struct rtentry *); 286static void lpintr(int); 287#endif /* INET */ 288 289struct isa_driver olptdriver = { 290 INTR_TYPE_TTY, 291 lptprobe, 292 lptattach, 293 "olpt" 294}; 295COMPAT_ISA_DRIVER(olpt, olptdriver); 296 297static d_open_t lptopen; 298static d_close_t lptclose; 299static d_write_t lptwrite; 300static d_ioctl_t lptioctl; 301 302#define CDEV_MAJOR 16 303static struct cdevsw lpt_cdevsw = { 304 /* open */ lptopen, 305 /* close */ lptclose, 306 /* read */ noread, 307 /* write */ lptwrite, 308 /* ioctl */ lptioctl, 309 /* poll */ nopoll, 310 /* mmap */ nommap, 311 /* strategy */ nostrategy, 312 /* name */ "lpt", 313 /* maj */ CDEV_MAJOR, 314 /* dump */ nodump, 315 /* psize */ nopsize, 316 /* flags */ 0, 317 /* bmaj */ -1 318}; 319 320#ifndef PC98 321/* 322 * Internal routine to lptprobe to do port tests of one byte value 323 */ 324static int 325lpt_port_test (int port, u_char data, u_char mask) 326{ 327 int temp, timeout; 328 329 data = data & mask; 330 outb(port, data); 331 timeout = 10000; 332 do { 333 DELAY(10); 334 temp = inb(port) & mask; 335 } 336 while (temp != data && --timeout); 337 lprintf(("Port 0x%x\tout=%x\tin=%x\ttout=%d\n", 338 port, data, temp, timeout)); 339 return (temp == data); 340} 341#endif /* PC98 */ 342 343/* 344 * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94 345 * Based partially on Rod Grimes' printer probe 346 * 347 * Logic: 348 * 1) If no port address was given, use the bios detected ports 349 * and autodetect what ports the printers are on. 350 * 2) Otherwise, probe the data port at the address given, 351 * using the method in Rod Grimes' port probe. 352 * (Much code ripped off directly from Rod's probe.) 353 * 354 * Comments from Rod's probe: 355 * Logic: 356 * 1) You should be able to write to and read back the same value 357 * to the data port. Do an alternating zeros, alternating ones, 358 * walking zero, and walking one test to check for stuck bits. 359 * 360 * 2) You should be able to write to and read back the same value 361 * to the control port lower 5 bits, the upper 3 bits are reserved 362 * per the IBM PC technical reference manauls and different boards 363 * do different things with them. Do an alternating zeros, alternating 364 * ones, walking zero, and walking one test to check for stuck bits. 365 * 366 * Some printers drag the strobe line down when the are powered off 367 * so this bit has been masked out of the control port test. 368 * 369 * XXX Some printers may not like a fast pulse on init or strobe, I 370 * don't know at this point, if that becomes a problem these bits 371 * should be turned off in the mask byte for the control port test. 372 * 373 * We are finally left with a mask of 0x14, due to some printers 374 * being adamant about holding other bits high ........ 375 * 376 * Before probing the control port, we write a 0 to the data port - 377 * If not, some printers chuck out garbage when the strobe line 378 * gets toggled. 379 * 380 * 3) Set the data and control ports to a value of 0 381 * 382 * This probe routine has been tested on Epson Lx-800, HP LJ3P, 383 * Epson FX-1170 and C.Itoh 8510RM 384 * printers. 385 * Quick exit on fail added. 386 */ 387 388int 389lptprobe(struct isa_device *dvp) 390{ 391#ifdef PC98 392#define PC98_OLD_LPT 0x40 393#define PC98_IEEE_1284_FUNCTION 0x149 394 unsigned int pc98_ieee_mode, tmp; 395 396 if (dvp->id_iobase == PC98_OLD_LPT) { 397 tmp = inb(PC98_IEEE_1284_FUNCTION); 398 pc98_ieee_mode = tmp; 399 if ((tmp & 0x10) == 0x10) { 400 outb(PC98_IEEE_1284_FUNCTION, tmp & ~0x10); 401 tmp = inb(PC98_IEEE_1284_FUNCTION); 402 if ((tmp & 0x10) != 0x10) { 403 outb(PC98_IEEE_1284_FUNCTION, pc98_ieee_mode); 404 return 0; 405 } 406 } 407 } 408 return 8; 409#else 410 int port; 411 static short next_bios_lpt = 0; 412 int status; 413 static u_char testbyte[18] = { 414 0x55, /* alternating zeros */ 415 0xaa, /* alternating ones */ 416 0xfe, 0xfd, 0xfb, 0xf7, 417 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */ 418 0x01, 0x02, 0x04, 0x08, 419 0x10, 0x20, 0x40, 0x80 /* walking one */ 420 }; 421 int i; 422 423 /* 424 * Make sure there is some way for lptopen to see that 425 * the port is not configured 426 * This 0 will remain if the port isn't attached 427 */ 428 (lpt_sc + dvp->id_unit)->sc_port = 0; 429 430 status = IO_LPTSIZE; 431 /* If port not specified, use bios list */ 432 if(dvp->id_iobase < 0) { /* port? */ 433 if((next_bios_lpt < BIOS_MAX_LPT) && 434 (*(BIOS_PORTS+next_bios_lpt) != 0) ) { 435 dvp->id_iobase = *(BIOS_PORTS+next_bios_lpt++); 436 goto end_probe; 437 } else 438 return (0); 439 } 440 441 /* Port was explicitly specified */ 442 /* This allows probing of ports unknown to the BIOS */ 443 port = dvp->id_iobase + lpt_data; 444 for (i = 0; i < 18; i++) { 445 if (!lpt_port_test(port, testbyte[i], 0xff)) { 446 status = 0; 447 goto end_probe; 448 } 449 } 450 451end_probe: 452 /* write 0's to control and data ports */ 453 outb(dvp->id_iobase+lpt_data, 0); 454 outb(dvp->id_iobase+lpt_control, 0); 455 456 return (status); 457#endif 458} 459 460/* XXX Todo - try and detect if interrupt is working */ 461int 462lptattach(struct isa_device *isdp) 463{ 464 struct lpt_softc *sc; 465 int unit; 466 467 isdp->id_ointr = lptintr; 468 unit = isdp->id_unit; 469 sc = lpt_sc + unit; 470 sc->sc_port = isdp->id_iobase; 471 sc->sc_primed = 0; /* not primed yet */ 472#ifdef PC98 473 outb(sc->sc_port+lpt_pstb_ctrl, LPC_DIS_PSTB); /* PSTB disable */ 474 outb(sc->sc_port+lpt_control, LPC_MODE8255); /* 8255 mode set */ 475 outb(sc->sc_port+lpt_control, LPC_NIRQ8); /* IRQ8 inactive */ 476 outb(sc->sc_port+lpt_control, LPC_NPSTB); /* PSTB inactive */ 477 outb(sc->sc_port+lpt_pstb_ctrl, LPC_EN_PSTB); /* PSTB enable */ 478#else 479 outb(sc->sc_port+lpt_control, LPC_NINIT); 480#endif 481 482 /* check if we can use interrupt */ 483 lprintf(("oldirq %x\n", sc->sc_irq)); 484 if (isdp->id_irq) { 485 sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ; 486 printf("lpt%d: Interrupt-driven port\n", unit); 487#ifdef INET 488 lpattach(sc, unit); 489#endif 490 } else { 491 sc->sc_irq = 0; 492 lprintf(("lpt%d: Polled port\n", unit)); 493 } 494 lprintf(("irq %x\n", sc->sc_irq)); 495 496 /* XXX what to do about the flags in the minor number? */ 497 make_dev(&lpt_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit); 498 make_dev(&lpt_cdevsw, unit | LP_BYPASS, 499 UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit); 500 501#ifdef LPT_DRVINIT_AT_ATTACH 502 lpt_drvinit(NULL); 503#endif 504 return (1); 505} 506 507/* 508 * lptopen -- reset the printer, then wait until it's selected and not busy. 509 * If LP_BYPASS flag is selected, then we do not try to select the 510 * printer -- this is just used for passing ioctls. 511 */ 512 513static int 514lptopen (dev_t dev, int flags, int fmt, struct proc *p) 515{ 516 struct lpt_softc *sc; 517 int s; 518#ifdef PC98 519 int port; 520#else 521 int trys, port; 522#endif 523 u_int unit = LPTUNIT(minor(dev)); 524 525 sc = lpt_sc + unit; 526 if ((unit >= NOLPT) || (sc->sc_port == 0)) 527 return (ENXIO); 528 529#ifdef INET 530 if (sc->sc_if.if_flags & IFF_UP) 531 return(EBUSY); 532#endif 533 534 if (sc->sc_state) { 535 lprintf(("lp: still open %x\n", sc->sc_state)); 536 return(EBUSY); 537 } else 538 sc->sc_state |= INIT; 539 540 sc->sc_flags = LPTFLAGS(minor(dev)); 541 542 /* Check for open with BYPASS flag set. */ 543 if (sc->sc_flags & LP_BYPASS) { 544 sc->sc_state = OPEN; 545 return(0); 546 } 547 548 s = spltty(); 549 lprintf(("lp flags 0x%x\n", sc->sc_flags)); 550 port = sc->sc_port; 551 552 /* set IRQ status according to ENABLE_IRQ flag */ 553 if (sc->sc_irq & LP_ENABLE_IRQ) 554 sc->sc_irq |= LP_USE_IRQ; 555 else 556 sc->sc_irq &= ~LP_USE_IRQ; 557 558 /* init printer */ 559#ifndef PC98 560 if ((sc->sc_flags & LP_NO_PRIME) == 0) { 561 if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) { 562 outb(port+lpt_control, 0); 563 sc->sc_primed++; 564 DELAY(500); 565 } 566 } 567 568 outb (port+lpt_control, LPC_SEL|LPC_NINIT); 569 570 /* wait till ready (printer running diagnostics) */ 571 trys = 0; 572 do { 573 /* ran out of waiting for the printer */ 574 if (trys++ >= LPINITRDY*4) { 575 splx(s); 576 sc->sc_state = 0; 577 lprintf(("status %x\n", inb(port+lpt_status))); 578 return (EBUSY); 579 } 580 581 /* wait 1/4 second, give up if we get a signal */ 582 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, "lptinit", hz/4) != 583 EWOULDBLOCK) { 584 sc->sc_state = 0; 585 splx(s); 586 return (EBUSY); 587 } 588 589 /* is printer online and ready for output */ 590 } while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 591 (LPS_SEL|LPS_NBSY|LPS_NERR)); 592 593 sc->sc_control = LPC_SEL|LPC_NINIT; 594 if (sc->sc_flags & LP_AUTOLF) 595 sc->sc_control |= LPC_AUTOL; 596 597 /* enable interrupt if interrupt-driven */ 598 if (sc->sc_irq & LP_USE_IRQ) 599 sc->sc_control |= LPC_ENA; 600 601 outb(port+lpt_control, sc->sc_control); 602#endif 603 604 sc->sc_state = OPEN; 605 sc->sc_inbuf = geteblk(BUFSIZE); 606 sc->sc_xfercnt = 0; 607 splx(s); 608 609 /* only use timeout if using interrupt */ 610 lprintf(("irq %x\n", sc->sc_irq)); 611 if (sc->sc_irq & LP_USE_IRQ) { 612 sc->sc_state |= TOUT; 613 timeout (lptout, (caddr_t)sc, 614 (sc->sc_backoff = hz/LPTOUTINITIAL)); 615 } 616 617 lprintf(("opened.\n")); 618 return(0); 619} 620 621static void 622lptout (void *arg) 623{ 624 struct lpt_softc *sc = arg; 625 int pl; 626 627 lprintf(("T %x ", inb(sc->sc_port+lpt_status))); 628 if (sc->sc_state & OPEN) { 629 sc->sc_backoff++; 630 if (sc->sc_backoff > hz/LPTOUTMAX) 631 sc->sc_backoff = sc->sc_backoff > hz/LPTOUTMAX; 632 timeout (lptout, (caddr_t)sc, sc->sc_backoff); 633 } else 634 sc->sc_state &= ~TOUT; 635 636 if (sc->sc_state & ERROR) 637 sc->sc_state &= ~ERROR; 638 639 /* 640 * Avoid possible hangs do to missed interrupts 641 */ 642 if (sc->sc_xfercnt) { 643 pl = spltty(); 644 lptintr(sc - lpt_sc); 645 splx(pl); 646 } else { 647 sc->sc_state &= ~OBUSY; 648 wakeup((caddr_t)sc); 649 } 650} 651 652/* 653 * lptclose -- close the device, free the local line buffer. 654 * 655 * Check for interrupted write call added. 656 */ 657 658static int 659lptclose(dev_t dev, int flags, int fmt, struct proc *p) 660{ 661 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 662#ifndef PC98 663 int port = sc->sc_port; 664#endif 665 666 if(sc->sc_flags & LP_BYPASS) 667 goto end_close; 668 669 sc->sc_state &= ~OPEN; 670 671#ifndef PC98 672 /* if the last write was interrupted, don't complete it */ 673 if((!(sc->sc_state & INTERRUPTED)) && (sc->sc_irq & LP_USE_IRQ)) 674 while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 675 (LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt) 676 /* wait 1/4 second, give up if we get a signal */ 677 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, 678 "lpclose", hz) != EWOULDBLOCK) 679 break; 680 681 outb(sc->sc_port+lpt_control, LPC_NINIT); 682#endif 683 brelse(sc->sc_inbuf); 684 685end_close: 686 sc->sc_state = 0; 687 sc->sc_xfercnt = 0; 688 lprintf(("closed.\n")); 689 return(0); 690} 691 692/* 693 * pushbytes() 694 * Workhorse for actually spinning and writing bytes to printer 695 * Derived from lpa.c 696 * Originally by ? 697 * 698 * This code is only used when we are polling the port 699 */ 700static int 701pushbytes(struct lpt_softc * sc) 702{ 703 int spin, err, tic; 704 char ch; 705 int port = sc->sc_port; 706 707 lprintf(("p")); 708 /* loop for every character .. */ 709 while (sc->sc_xfercnt > 0) { 710 /* printer data */ 711 ch = *(sc->sc_cp); 712 sc->sc_cp++; 713 sc->sc_xfercnt--; 714 715 /* 716 * Wait for printer ready. 717 * Loop 20 usecs testing BUSY bit, then sleep 718 * for exponentially increasing timeout. (vak) 719 */ 720 for (spin=0; NOT_READY(port+lpt_status) && spin<MAX_SPIN; ++spin) 721 DELAY(1); /* XXX delay is NOT this accurate! */ 722 if (spin >= MAX_SPIN) { 723 tic = 0; 724 while (NOT_READY(port+lpt_status)) { 725 /* 726 * Now sleep, every cycle a 727 * little longer .. 728 */ 729 tic = tic + tic + 1; 730 /* 731 * But no more than 10 seconds. (vak) 732 */ 733 if (tic > MAX_SLEEP) 734 tic = MAX_SLEEP; 735 err = tsleep((caddr_t)sc, LPPRI, 736 "lptpoll", tic); 737 if (err != EWOULDBLOCK) { 738 return (err); 739 } 740 } 741 } 742 743 /* output data */ 744 outb(port+lpt_data, ch); 745#ifdef PC98 746 DELAY(1); 747 outb(port+lpt_control, LPC_PSTB); 748 DELAY(1); 749 outb(port+lpt_control, LPC_NPSTB); 750#else 751 /* strobe */ 752 outb(port+lpt_control, sc->sc_control|LPC_STB); 753 outb(port+lpt_control, sc->sc_control); 754#endif 755 756 } 757 return(0); 758} 759 760/* 761 * lptwrite --copy a line from user space to a local buffer, then call 762 * putc to get the chars moved to the output queue. 763 * 764 * Flagging of interrupted write added. 765 */ 766 767static int 768lptwrite(dev_t dev, struct uio * uio, int ioflag) 769{ 770 register unsigned n; 771 int pl, err; 772 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 773 774 if(sc->sc_flags & LP_BYPASS) { 775 /* we can't do writes in bypass mode */ 776 return(EPERM); 777 } 778 779 sc->sc_state &= ~INTERRUPTED; 780 while ((n = min(BUFSIZE, uio->uio_resid)) != 0) { 781 sc->sc_cp = sc->sc_inbuf->b_data ; 782 uiomove(sc->sc_cp, n, uio); 783 sc->sc_xfercnt = n ; 784 while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) { 785 lprintf(("i")); 786 /* if the printer is ready for a char, */ 787 /* give it one */ 788 if ((sc->sc_state & OBUSY) == 0){ 789 lprintf(("\nC %d. ", sc->sc_xfercnt)); 790 pl = spltty(); 791 lptintr(sc - lpt_sc); 792 (void) splx(pl); 793 } 794 lprintf(("W ")); 795 if (sc->sc_state & OBUSY) 796 if ((err = tsleep ((caddr_t)sc, 797 LPPRI|PCATCH, "lpwrite", 0))) { 798 sc->sc_state |= INTERRUPTED; 799 return(err); 800 } 801 } 802 /* check to see if we must do a polled write */ 803 if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) { 804 lprintf(("p")); 805 if((err = pushbytes(sc))) 806 return(err); 807 } 808 } 809 return(0); 810} 811 812/* 813 * lptintr -- handle printer interrupts which occur when the printer is 814 * ready to accept another char. 815 * 816 * do checking for interrupted write call. 817 */ 818 819static void 820lptintr(int unit) 821{ 822#if defined(INET) || !defined(PC98) 823 struct lpt_softc *sc = lpt_sc + unit; 824#endif 825#ifndef PC98 826 int port = sc->sc_port, sts; 827 int i; 828#endif 829 830#ifdef INET 831 if(sc->sc_if.if_flags & IFF_UP) { 832 lpintr(unit); 833 return; 834 } 835#endif /* INET */ 836 837#ifndef PC98 838 /* 839 * Is printer online and ready for output? 840 * 841 * Avoid falling back to lptout() too quickly. First spin-loop 842 * to see if the printer will become ready ``really soon now''. 843 */ 844 for (i = 0; 845 i < 100 && 846 ((sts=inb(port+lpt_status)) & RDY_MASK) != LP_READY; 847 i++) ; 848 if ((sts & RDY_MASK) == LP_READY) { 849 sc->sc_state = (sc->sc_state | OBUSY) & ~ERROR; 850 sc->sc_backoff = hz/LPTOUTINITIAL; 851 852 if (sc->sc_xfercnt) { 853 /* send char */ 854 /*lprintf(("%x ", *sc->sc_cp)); */ 855 outb(port+lpt_data, *sc->sc_cp++) ; 856 outb(port+lpt_control, sc->sc_control|LPC_STB); 857 /* DELAY(X) */ 858 outb(port+lpt_control, sc->sc_control); 859 860 /* any more data for printer */ 861 if(--(sc->sc_xfercnt) > 0) return; 862 } 863 864 /* 865 * No more data waiting for printer. 866 * Wakeup is not done if write call was interrupted. 867 */ 868 sc->sc_state &= ~OBUSY; 869 if(!(sc->sc_state & INTERRUPTED)) 870 wakeup((caddr_t)sc); 871 lprintf(("w ")); 872 return; 873 } else { /* check for error */ 874 if(((sts & (LPS_NERR | LPS_OUT) ) != LPS_NERR) && 875 (sc->sc_state & OPEN)) 876 sc->sc_state |= ERROR; 877 /* lptout() will jump in and try to restart. */ 878 } 879#endif 880 lprintf(("sts %x ", sts)); 881} 882 883static int 884lptioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p) 885{ 886 int error = 0; 887 struct lpt_softc *sc; 888 u_int unit = LPTUNIT(minor(dev)); 889 u_char old_sc_irq; /* old printer IRQ status */ 890 891 sc = lpt_sc + unit; 892 893 switch (cmd) { 894 case LPT_IRQ : 895 if(sc->sc_irq & LP_HAS_IRQ) { 896 /* 897 * NOTE: 898 * If the IRQ status is changed, 899 * this will only be visible on the 900 * next open. 901 * 902 * If interrupt status changes, 903 * this gets syslog'd. 904 */ 905 old_sc_irq = sc->sc_irq; 906 if(*(int*)data == 0) 907 sc->sc_irq &= (~LP_ENABLE_IRQ); 908 else 909 sc->sc_irq |= LP_ENABLE_IRQ; 910 if (old_sc_irq != sc->sc_irq ) 911 log(LOG_NOTICE, "lpt%c switched to %s mode\n", 912 (char)unit+'0', 913 (sc->sc_irq & LP_ENABLE_IRQ)? 914 "interrupt-driven":"polled"); 915 } else /* polled port */ 916 error = EOPNOTSUPP; 917 break; 918 default: 919 error = ENODEV; 920 } 921 922 return(error); 923} 924 925#ifdef INET 926 927static void 928lpattach (struct lpt_softc *sc, int unit) 929{ 930 struct ifnet *ifp = &sc->sc_if; 931 932 ifp->if_softc = sc; 933 ifp->if_name = "lp"; 934 ifp->if_unit = unit; 935 ifp->if_mtu = LPMTU; 936 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 937 ifp->if_ioctl = lpioctl; 938 ifp->if_output = lpoutput; 939 ifp->if_type = IFT_PARA; 940 ifp->if_hdrlen = 0; 941 ifp->if_addrlen = 0; 942 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 943 if_attach(ifp); 944 printf("lp%d: TCP/IP capable interface\n", unit); 945 946 bpfattach(ifp, DLT_NULL, LPIPHDRLEN); 947} 948 949#ifndef PC98 950/* 951 * Build the translation tables for the LPIP (BSD unix) protocol. 952 * We don't want to calculate these nasties in our tight loop, so we 953 * precalculate them when we initialize. 954 */ 955static int 956lpinittables (void) 957{ 958 int i; 959 960 if (!txmith) 961 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 962 963 if (!txmith) 964 return 1; 965 966 if (!ctxmith) 967 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 968 969 if (!ctxmith) 970 return 1; 971 972 for (i=0; i < LPIPTBLSIZE; i++) { 973 ctxmith[i] = (i & 0xF0) >> 4; 974 ctxmitl[i] = 0x10 | (i & 0x0F); 975 ctrecvh[i] = (i & 0x78) << 1; 976 ctrecvl[i] = (i & 0x78) >> 3; 977 } 978 979 for (i=0; i < LPIPTBLSIZE; i++) { 980 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 981 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 982 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 983 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 984 } 985 986 return 0; 987} 988#endif /* PC98 */ 989 990/* 991 * Process an ioctl request. 992 */ 993 994static int 995lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 996{ 997 struct lpt_softc *sc = lpt_sc + ifp->if_unit; 998 struct ifaddr *ifa = (struct ifaddr *)data; 999 struct ifreq *ifr = (struct ifreq *)data; 1000 u_char *ptr; 1001 1002 switch (cmd) { 1003 1004 case SIOCSIFDSTADDR: 1005 case SIOCAIFADDR: 1006 case SIOCSIFADDR: 1007 if (ifa->ifa_addr->sa_family != AF_INET) 1008 return EAFNOSUPPORT; 1009 ifp->if_flags |= IFF_UP; 1010 /* FALLTHROUGH */ 1011 case SIOCSIFFLAGS: 1012 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 1013 outb(sc->sc_port + lpt_control, 0x00); 1014 ifp->if_flags &= ~IFF_RUNNING; 1015 break; 1016 } 1017#ifdef PC98 1018 /* XXX */ 1019 return ENOBUFS; 1020#else 1021 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 1022 if (lpinittables()) 1023 return ENOBUFS; 1024 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 1025 M_DEVBUF, M_WAITOK); 1026 if (!sc->sc_ifbuf) 1027 return ENOBUFS; 1028 1029 outb(sc->sc_port + lpt_control, LPC_ENA); 1030 ifp->if_flags |= IFF_RUNNING; 1031 } 1032 break; 1033#endif 1034 case SIOCSIFMTU: 1035 ptr = sc->sc_ifbuf; 1036 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 1037 if (!sc->sc_ifbuf) { 1038 sc->sc_ifbuf = ptr; 1039 return ENOBUFS; 1040 } 1041 if (ptr) 1042 free(ptr,M_DEVBUF); 1043 sc->sc_if.if_mtu = ifr->ifr_mtu; 1044 break; 1045 1046 case SIOCGIFMTU: 1047 ifr->ifr_mtu = sc->sc_if.if_mtu; 1048 break; 1049 1050 case SIOCADDMULTI: 1051 case SIOCDELMULTI: 1052 if (ifr == 0) { 1053 return EAFNOSUPPORT; /* XXX */ 1054 } 1055 switch (ifr->ifr_addr.sa_family) { 1056 1057#ifdef INET 1058 case AF_INET: 1059 break; 1060#endif 1061 1062 default: 1063 return EAFNOSUPPORT; 1064 } 1065 break; 1066 1067 default: 1068 lprintf(("LP:ioctl(0x%lx)\n", cmd)); 1069 return EINVAL; 1070 } 1071 return 0; 1072} 1073 1074static __inline int 1075clpoutbyte (u_char byte, int spin, int data_port, int status_port) 1076{ 1077 outb(data_port, ctxmitl[byte]); 1078 while (inb(status_port) & CLPIP_SHAKE) 1079 if (--spin == 0) { 1080 return 1; 1081 } 1082 outb(data_port, ctxmith[byte]); 1083 while (!(inb(status_port) & CLPIP_SHAKE)) 1084 if (--spin == 0) { 1085 return 1; 1086 } 1087 return 0; 1088} 1089 1090static __inline int 1091clpinbyte (int spin, int data_port, int status_port) 1092{ 1093 int c, cl; 1094 1095 while((inb(status_port) & CLPIP_SHAKE)) 1096 if(!--spin) { 1097 return -1; 1098 } 1099 cl = inb(status_port); 1100 outb(data_port, 0x10); 1101 1102 while(!(inb(status_port) & CLPIP_SHAKE)) 1103 if(!--spin) { 1104 return -1; 1105 } 1106 c = inb(status_port); 1107 outb(data_port, 0x00); 1108 1109 return (ctrecvl[cl] | ctrecvh[c]); 1110} 1111 1112static void 1113lpintr (int unit) 1114{ 1115 struct lpt_softc *sc = lpt_sc + unit; 1116 register int lpt_data_port = sc->sc_port + lpt_data; 1117 register int lpt_stat_port = sc->sc_port + lpt_status; 1118 int lpt_ctrl_port = sc->sc_port + lpt_control; 1119 int len, s, j; 1120 u_char *bp; 1121 u_char c, cl; 1122 struct mbuf *top; 1123 1124 s = splhigh(); 1125 1126 if (sc->sc_if.if_flags & IFF_LINK0) { 1127 1128 /* Ack. the request */ 1129 outb(lpt_data_port, 0x01); 1130 1131 /* Get the packet length */ 1132 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1133 if (j == -1) 1134 goto err; 1135 len = j; 1136 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1137 if (j == -1) 1138 goto err; 1139 len = len + (j << 8); 1140 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 1141 goto err; 1142 1143 bp = sc->sc_ifbuf; 1144 1145 while (len--) { 1146 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1147 if (j == -1) { 1148 goto err; 1149 } 1150 *bp++ = j; 1151 } 1152 /* Get and ignore checksum */ 1153 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1154 if (j == -1) { 1155 goto err; 1156 } 1157 1158 len = bp - sc->sc_ifbuf; 1159 if (len <= CLPIPHDRLEN) 1160 goto err; 1161 1162 sc->sc_iferrs = 0; 1163 1164 len -= CLPIPHDRLEN; 1165 sc->sc_if.if_ipackets++; 1166 sc->sc_if.if_ibytes += len; 1167 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 1168 if (top) { 1169 if (! IF_HANDOFF(&ipintrq, top, NULL)) 1170 lprintf(("DROP")); 1171 else 1172 schednetisr(NETISR_IP); 1173 } 1174 goto done; 1175 } 1176 while ((inb(lpt_stat_port) & LPIP_SHAKE)) { 1177 len = sc->sc_if.if_mtu + LPIPHDRLEN; 1178 bp = sc->sc_ifbuf; 1179 while (len--) { 1180 1181 cl = inb(lpt_stat_port); 1182 outb(lpt_data_port, 8); 1183 1184 j = LPMAXSPIN2; 1185 while((inb(lpt_stat_port) & LPIP_SHAKE)) 1186 if(!--j) goto err; 1187 1188 c = inb(lpt_stat_port); 1189 outb(lpt_data_port, 0); 1190 1191 *bp++= trecvh[cl] | trecvl[c]; 1192 1193 j = LPMAXSPIN2; 1194 while (!((cl=inb(lpt_stat_port)) & LPIP_SHAKE)) { 1195 if (cl != c && 1196 (((cl = inb(lpt_stat_port)) ^ 0xb8) & 0xf8) == 1197 (c & 0xf8)) 1198 goto end; 1199 if (!--j) goto err; 1200 } 1201 } 1202 1203 end: 1204 len = bp - sc->sc_ifbuf; 1205 if (len <= LPIPHDRLEN) 1206 goto err; 1207 1208 sc->sc_iferrs = 0; 1209 1210 if (sc->sc_if.if_bpf) { 1211 bpf_tap(&sc->sc_if, sc->sc_ifbuf, len); 1212 } 1213 len -= LPIPHDRLEN; 1214 sc->sc_if.if_ipackets++; 1215 sc->sc_if.if_ibytes += len; 1216 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 1217 if (top) { 1218 if (! IF_HANDOFF(&ipintrq, top, NULL)) 1219 lprintf(("DROP")); 1220 else 1221 schednetisr(NETISR_IP); 1222 } 1223 } 1224 goto done; 1225 1226 err: 1227 outb(lpt_data_port, 0); 1228 lprintf(("R")); 1229 sc->sc_if.if_ierrors++; 1230 sc->sc_iferrs++; 1231 1232 /* 1233 * We are not able to send receive anything for now, 1234 * so stop wasting our time 1235 */ 1236 if (sc->sc_iferrs > LPMAXERRS) { 1237 printf("lp%d: Too many errors, Going off-line.\n", unit); 1238 outb(lpt_ctrl_port, 0x00); 1239 sc->sc_if.if_flags &= ~IFF_RUNNING; 1240 sc->sc_iferrs=0; 1241 } 1242 1243 done: 1244 splx(s); 1245 return; 1246} 1247 1248static __inline int 1249lpoutbyte (u_char byte, int spin, int data_port, int status_port) 1250{ 1251 outb(data_port, txmith[byte]); 1252 while (!(inb(status_port) & LPIP_SHAKE)) 1253 if (--spin == 0) 1254 return 1; 1255 outb(data_port, txmitl[byte]); 1256 while (inb(status_port) & LPIP_SHAKE) 1257 if (--spin == 0) 1258 return 1; 1259 return 0; 1260} 1261 1262static int 1263lpoutput (struct ifnet *ifp, struct mbuf *m, 1264 struct sockaddr *dst, struct rtentry *rt) 1265{ 1266 register int lpt_data_port = lpt_sc[ifp->if_unit].sc_port + lpt_data; 1267 register int lpt_stat_port = lpt_sc[ifp->if_unit].sc_port + lpt_status; 1268#ifndef PC98 1269 int lpt_ctrl_port = lpt_sc[ifp->if_unit].sc_port + lpt_control; 1270#endif 1271 1272 int s, err; 1273 struct mbuf *mm; 1274 u_char *cp = "\0\0"; 1275 u_char chksum = 0; 1276 int count = 0; 1277 int i; 1278 int spin; 1279 1280 /* We need a sensible value if we abort */ 1281 cp++; 1282 ifp->if_flags |= IFF_RUNNING; 1283 1284 err = 1; /* assume we're aborting because of an error */ 1285 1286 s = splhigh(); 1287 1288#ifndef PC98 1289 /* Suspend (on laptops) or receive-errors might have taken us offline */ 1290 outb(lpt_ctrl_port, LPC_ENA); 1291#endif 1292 1293 if (ifp->if_flags & IFF_LINK0) { 1294 1295 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1296 lprintf(("&")); 1297 lptintr(ifp->if_unit); 1298 } 1299 1300 /* Alert other end to pending packet */ 1301 spin = LPMAXSPIN1; 1302 outb(lpt_data_port, 0x08); 1303 while ((inb(lpt_stat_port) & 0x08) == 0) 1304 if (--spin == 0) { 1305 goto nend; 1306 } 1307 1308 /* Calculate length of packet, then send that */ 1309 1310 count += 14; /* Ethernet header len */ 1311 1312 mm = m; 1313 for (mm = m; mm; mm = mm->m_next) { 1314 count += mm->m_len; 1315 } 1316 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1317 goto nend; 1318 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1319 goto nend; 1320 1321 /* Send dummy ethernet header */ 1322 for (i = 0; i < 12; i++) { 1323 if (clpoutbyte(i, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1324 goto nend; 1325 chksum += i; 1326 } 1327 1328 if (clpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1329 goto nend; 1330 if (clpoutbyte(0x00, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1331 goto nend; 1332 chksum += 0x08 + 0x00; /* Add into checksum */ 1333 1334 mm = m; 1335 do { 1336 cp = mtod(mm, u_char *); 1337 while (mm->m_len--) { 1338 chksum += *cp; 1339 if (clpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1340 goto nend; 1341 } 1342 } while ((mm = mm->m_next)); 1343 1344 /* Send checksum */ 1345 if (clpoutbyte(chksum, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1346 goto nend; 1347 1348 /* Go quiescent */ 1349 outb(lpt_data_port, 0); 1350 1351 err = 0; /* No errors */ 1352 1353 nend: 1354 if (err) { /* if we didn't timeout... */ 1355 ifp->if_oerrors++; 1356 lprintf(("X")); 1357 } else { 1358 ifp->if_opackets++; 1359 ifp->if_obytes += m->m_pkthdr.len; 1360 } 1361 1362 m_freem(m); 1363 1364 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1365 lprintf(("^")); 1366 lptintr(ifp->if_unit); 1367 } 1368 (void) splx(s); 1369 return 0; 1370 } 1371 1372 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1373 lprintf(("&")); 1374 lptintr(ifp->if_unit); 1375 } 1376 1377 if (lpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1378 goto end; 1379 if (lpoutbyte(0x00, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1380 goto end; 1381 1382 mm = m; 1383 do { 1384 cp = mtod(mm,u_char *); 1385 while (mm->m_len--) 1386 if (lpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1387 goto end; 1388 } while ((mm = mm->m_next)); 1389 1390 err = 0; /* no errors were encountered */ 1391 1392 end: 1393 --cp; 1394 outb(lpt_data_port, txmitl[*cp] ^ 0x17); 1395 1396 if (err) { /* if we didn't timeout... */ 1397 ifp->if_oerrors++; 1398 lprintf(("X")); 1399 } else { 1400 ifp->if_opackets++; 1401 ifp->if_obytes += m->m_pkthdr.len; 1402 if (ifp->if_bpf) { 1403 /* 1404 * We need to prepend the packet type as 1405 * a two byte field. Cons up a dummy header 1406 * to pacify bpf. This is safe because bpf 1407 * will only read from the mbuf (i.e., it won't 1408 * try to free it or keep a pointer to it). 1409 */ 1410 struct mbuf m0; 1411 u_short hdr = 0x800; 1412 1413 m0.m_next = m; 1414 m0.m_len = 2; 1415 m0.m_data = (char *)&hdr; 1416 1417 bpf_mtap(ifp, &m0); 1418 } 1419 } 1420 1421 m_freem(m); 1422 1423 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1424 lprintf(("^")); 1425 lptintr(ifp->if_unit); 1426 } 1427 1428 (void) splx(s); 1429 return 0; 1430} 1431 1432#endif /* INET */ 1433 1434static int lpt_devsw_installed; 1435 1436static void lpt_drvinit(void *unused) 1437{ 1438 1439 if( ! lpt_devsw_installed ) { 1440 cdevsw_add(&lpt_cdevsw); 1441 lpt_devsw_installed = 1; 1442 } 1443} 1444#ifndef LPT_DRVINIT_AT_ATTACH 1445SYSINIT(lptdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,lpt_drvinit,NULL) 1446#endif 1447