olpt.c revision 58142
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 58142 2000-03-16 12:06:29Z 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/buf.h> 115#include <sys/kernel.h> 116#include <sys/uio.h> 117#include <sys/syslog.h> 118#include <machine/clock.h> 119#include <machine/lpt.h> 120 121#include <i386/isa/isa_device.h> 122#include <i386/isa/lptreg.h> 123 124#ifdef INET 125#include <sys/malloc.h> 126#include <sys/mbuf.h> 127#include <sys/socket.h> 128#include <sys/sockio.h> 129 130#include <net/if.h> 131#include <net/if_types.h> 132#include <net/netisr.h> 133#include <netinet/in.h> 134#include <netinet/in_var.h> 135#include <net/bpf.h> 136#endif /* INET */ 137 138 139#define LPINITRDY 4 /* wait up to 4 seconds for a ready */ 140#define LPTOUTINITIAL 10 /* initial timeout to wait for ready 1/10 s */ 141#define LPTOUTMAX 1 /* maximal timeout 1 s */ 142#define LPPRI (PZERO+8) 143#define BUFSIZE 1024 144 145#ifdef INET 146#ifndef LPMTU /* MTU for the lp# interfaces */ 147#define LPMTU 1500 148#endif 149 150#ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 151#define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 152#endif 153 154#ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 155#define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 156#endif 157 158#ifndef LPMAXERRS /* Max errors before !RUNNING */ 159#define LPMAXERRS 100 160#endif 161 162#define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 163#define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 164#define MLPIPHDRLEN CLPIPHDRLEN 165 166#define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 167#define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 168#if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 169#define MLPIPHDRLEN LPIPHDRLEN 170#endif 171 172#define LPIPTBLSIZE 256 /* Size of octet translation table */ 173 174#endif /* INET */ 175 176#ifndef PC98 177/* BIOS printer list - used by BIOS probe*/ 178#define BIOS_LPT_PORTS 0x408 179#define BIOS_PORTS (short *)(KERNBASE+BIOS_LPT_PORTS) 180#define BIOS_MAX_LPT 4 181#endif 182 183 184#ifndef DEBUG 185#define lprintf(args) 186#else 187#define lprintf(args) do { \ 188 if (lptflag) \ 189 printf args; \ 190 } while (0) 191static int volatile lptflag = 1; 192#endif 193 194#define LPTUNIT(s) ((s)&0x03) 195#define LPTFLAGS(s) ((s)&0xfc) 196 197static struct lpt_softc { 198 int sc_port; 199 short sc_state; 200 /* default case: negative prime, negative ack, handshake strobe, 201 prime once */ 202 u_char sc_control; 203 char sc_flags; 204#define LP_POS_INIT 0x04 /* if we are a postive init signal */ 205#define LP_POS_ACK 0x08 /* if we are a positive going ack */ 206#define LP_NO_PRIME 0x10 /* don't prime the printer at all */ 207#define LP_PRIMEOPEN 0x20 /* prime on every open */ 208#define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */ 209#define LP_BYPASS 0x80 /* bypass printer ready checks */ 210 struct buf *sc_inbuf; 211 short sc_xfercnt ; 212 char sc_primed; 213 char *sc_cp ; 214 u_char sc_irq ; /* IRQ status of port */ 215#define LP_HAS_IRQ 0x01 /* we have an irq available */ 216#define LP_USE_IRQ 0x02 /* we are using our irq */ 217#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */ 218 u_char sc_backoff ; /* time to call lptout() again */ 219 220#ifdef INET 221 struct ifnet sc_if; 222 u_char *sc_ifbuf; 223 int sc_iferrs; 224#endif 225} lpt_sc[NOLPT] ; 226 227/* bits for state */ 228#define OPEN (1<<0) /* device is open */ 229#define ASLP (1<<1) /* awaiting draining of printer */ 230#define ERROR (1<<2) /* error was received from printer */ 231#define OBUSY (1<<3) /* printer is busy doing output */ 232#define LPTOUT (1<<4) /* timeout while not selected */ 233#define TOUT (1<<5) /* timeout while not selected */ 234#define INIT (1<<6) /* waiting to initialize for open */ 235#define INTERRUPTED (1<<7) /* write call was interrupted */ 236 237 238/* status masks to interrogate printer status */ 239#define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */ 240#define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR) 241 242/* Printer Ready condition - from lpa.c */ 243/* Only used in polling code */ 244#ifdef PC98 245#define NOT_READY(x) ((inb(x) & LPS_NBSY) != LPS_NBSY) 246#else /* IBM-PC */ 247#define LPS_INVERT (LPS_NBSY | LPS_NACK | LPS_SEL | LPS_NERR) 248#define LPS_MASK (LPS_NBSY | LPS_NACK | LPS_OUT | LPS_SEL | LPS_NERR) 249#define NOT_READY(x) ((inb(x)^LPS_INVERT)&LPS_MASK) 250#endif 251 252#define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */ 253#define MAX_SPIN 20 /* Max delay for device ready in usecs */ 254 255static timeout_t lptout; 256static int lptprobe (struct isa_device *dvp); 257static int lptattach (struct isa_device *isdp); 258static ointhand2_t lptintr; 259static void lpt_drvinit(void *unused); 260 261#ifdef INET 262 263/* Tables for the lp# interface */ 264static u_char *txmith; 265#define txmitl (txmith+(1*LPIPTBLSIZE)) 266#define trecvh (txmith+(2*LPIPTBLSIZE)) 267#define trecvl (txmith+(3*LPIPTBLSIZE)) 268 269static u_char *ctxmith; 270#define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 271#define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 272#define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 273 274/* Functions for the lp# interface */ 275static void lpattach(struct lpt_softc *,int); 276#ifndef PC98 277static int lpinittables(void); 278#endif 279static int lpioctl(struct ifnet *, u_long, caddr_t); 280static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 281 struct rtentry *); 282static void lpintr(int); 283#endif /* INET */ 284 285struct isa_driver olptdriver = { 286 lptprobe, lptattach, "olpt" 287}; 288 289static d_open_t lptopen; 290static d_close_t lptclose; 291static d_write_t lptwrite; 292static d_ioctl_t lptioctl; 293 294#define CDEV_MAJOR 16 295static struct cdevsw lpt_cdevsw = { 296 /* open */ lptopen, 297 /* close */ lptclose, 298 /* read */ noread, 299 /* write */ lptwrite, 300 /* ioctl */ lptioctl, 301 /* poll */ nopoll, 302 /* mmap */ nommap, 303 /* strategy */ nostrategy, 304 /* name */ "lpt", 305 /* maj */ CDEV_MAJOR, 306 /* dump */ nodump, 307 /* psize */ nopsize, 308 /* flags */ 0, 309 /* bmaj */ -1 310}; 311 312#ifndef PC98 313/* 314 * Internal routine to lptprobe to do port tests of one byte value 315 */ 316static int 317lpt_port_test (int port, u_char data, u_char mask) 318{ 319 int temp, timeout; 320 321 data = data & mask; 322 outb(port, data); 323 timeout = 10000; 324 do { 325 DELAY(10); 326 temp = inb(port) & mask; 327 } 328 while (temp != data && --timeout); 329 lprintf(("Port 0x%x\tout=%x\tin=%x\ttout=%d\n", 330 port, data, temp, timeout)); 331 return (temp == data); 332} 333#endif /* PC98 */ 334 335/* 336 * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94 337 * Based partially on Rod Grimes' printer probe 338 * 339 * Logic: 340 * 1) If no port address was given, use the bios detected ports 341 * and autodetect what ports the printers are on. 342 * 2) Otherwise, probe the data port at the address given, 343 * using the method in Rod Grimes' port probe. 344 * (Much code ripped off directly from Rod's probe.) 345 * 346 * Comments from Rod's probe: 347 * Logic: 348 * 1) You should be able to write to and read back the same value 349 * to the data port. Do an alternating zeros, alternating ones, 350 * walking zero, and walking one test to check for stuck bits. 351 * 352 * 2) You should be able to write to and read back the same value 353 * to the control port lower 5 bits, the upper 3 bits are reserved 354 * per the IBM PC technical reference manauls and different boards 355 * do different things with them. Do an alternating zeros, alternating 356 * ones, walking zero, and walking one test to check for stuck bits. 357 * 358 * Some printers drag the strobe line down when the are powered off 359 * so this bit has been masked out of the control port test. 360 * 361 * XXX Some printers may not like a fast pulse on init or strobe, I 362 * don't know at this point, if that becomes a problem these bits 363 * should be turned off in the mask byte for the control port test. 364 * 365 * We are finally left with a mask of 0x14, due to some printers 366 * being adamant about holding other bits high ........ 367 * 368 * Before probing the control port, we write a 0 to the data port - 369 * If not, some printers chuck out garbage when the strobe line 370 * gets toggled. 371 * 372 * 3) Set the data and control ports to a value of 0 373 * 374 * This probe routine has been tested on Epson Lx-800, HP LJ3P, 375 * Epson FX-1170 and C.Itoh 8510RM 376 * printers. 377 * Quick exit on fail added. 378 */ 379 380int 381lptprobe(struct isa_device *dvp) 382{ 383#ifdef PC98 384#define PC98_OLD_LPT 0x40 385#define PC98_IEEE_1284_FUNCTION 0x149 386 unsigned int pc98_ieee_mode, tmp; 387 388 if (dvp->id_iobase == PC98_OLD_LPT) { 389 tmp = inb(PC98_IEEE_1284_FUNCTION); 390 pc98_ieee_mode = tmp; 391 if ((tmp & 0x10) == 0x10) { 392 outb(PC98_IEEE_1284_FUNCTION, tmp & ~0x10); 393 tmp = inb(PC98_IEEE_1284_FUNCTION); 394 if ((tmp & 0x10) != 0x10) { 395 outb(PC98_IEEE_1284_FUNCTION, pc98_ieee_mode); 396 return 0; 397 } 398 } 399 } 400 return 8; 401#else 402 int port; 403 static short next_bios_lpt = 0; 404 int status; 405 static u_char testbyte[18] = { 406 0x55, /* alternating zeros */ 407 0xaa, /* alternating ones */ 408 0xfe, 0xfd, 0xfb, 0xf7, 409 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */ 410 0x01, 0x02, 0x04, 0x08, 411 0x10, 0x20, 0x40, 0x80 /* walking one */ 412 }; 413 int i; 414 415 /* 416 * Make sure there is some way for lptopen to see that 417 * the port is not configured 418 * This 0 will remain if the port isn't attached 419 */ 420 (lpt_sc + dvp->id_unit)->sc_port = 0; 421 422 status = IO_LPTSIZE; 423 /* If port not specified, use bios list */ 424 if(dvp->id_iobase < 0) { /* port? */ 425 if((next_bios_lpt < BIOS_MAX_LPT) && 426 (*(BIOS_PORTS+next_bios_lpt) != 0) ) { 427 dvp->id_iobase = *(BIOS_PORTS+next_bios_lpt++); 428 goto end_probe; 429 } else 430 return (0); 431 } 432 433 /* Port was explicitly specified */ 434 /* This allows probing of ports unknown to the BIOS */ 435 port = dvp->id_iobase + lpt_data; 436 for (i = 0; i < 18; i++) { 437 if (!lpt_port_test(port, testbyte[i], 0xff)) { 438 status = 0; 439 goto end_probe; 440 } 441 } 442 443end_probe: 444 /* write 0's to control and data ports */ 445 outb(dvp->id_iobase+lpt_data, 0); 446 outb(dvp->id_iobase+lpt_control, 0); 447 448 return (status); 449#endif 450} 451 452/* XXX Todo - try and detect if interrupt is working */ 453int 454lptattach(struct isa_device *isdp) 455{ 456 struct lpt_softc *sc; 457 int unit; 458 459 isdp->id_ointr = lptintr; 460 unit = isdp->id_unit; 461 sc = lpt_sc + unit; 462 sc->sc_port = isdp->id_iobase; 463 sc->sc_primed = 0; /* not primed yet */ 464#ifdef PC98 465 outb(sc->sc_port+lpt_pstb_ctrl, LPC_DIS_PSTB); /* PSTB disable */ 466 outb(sc->sc_port+lpt_control, LPC_MODE8255); /* 8255 mode set */ 467 outb(sc->sc_port+lpt_control, LPC_NIRQ8); /* IRQ8 inactive */ 468 outb(sc->sc_port+lpt_control, LPC_NPSTB); /* PSTB inactive */ 469 outb(sc->sc_port+lpt_pstb_ctrl, LPC_EN_PSTB); /* PSTB enable */ 470#else 471 outb(sc->sc_port+lpt_control, LPC_NINIT); 472#endif 473 474 /* check if we can use interrupt */ 475 lprintf(("oldirq %x\n", sc->sc_irq)); 476 if (isdp->id_irq) { 477 sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ; 478 printf("lpt%d: Interrupt-driven port\n", unit); 479#ifdef INET 480 lpattach(sc, unit); 481#endif 482 } else { 483 sc->sc_irq = 0; 484 lprintf(("lpt%d: Polled port\n", unit)); 485 } 486 lprintf(("irq %x\n", sc->sc_irq)); 487 488 /* XXX what to do about the flags in the minor number? */ 489 make_dev(&lpt_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit); 490 make_dev(&lpt_cdevsw, unit | LP_BYPASS, 491 UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit); 492 493#ifdef LPT_DRVINIT_AT_ATTACH 494 lpt_drvinit(NULL); 495#endif 496 return (1); 497} 498 499/* 500 * lptopen -- reset the printer, then wait until it's selected and not busy. 501 * If LP_BYPASS flag is selected, then we do not try to select the 502 * printer -- this is just used for passing ioctls. 503 */ 504 505static int 506lptopen (dev_t dev, int flags, int fmt, struct proc *p) 507{ 508 struct lpt_softc *sc; 509 int s; 510#ifdef PC98 511 int port; 512#else 513 int trys, port; 514#endif 515 u_int unit = LPTUNIT(minor(dev)); 516 517 sc = lpt_sc + unit; 518 if ((unit >= NOLPT) || (sc->sc_port == 0)) 519 return (ENXIO); 520 521#ifdef INET 522 if (sc->sc_if.if_flags & IFF_UP) 523 return(EBUSY); 524#endif 525 526 if (sc->sc_state) { 527 lprintf(("lp: still open %x\n", sc->sc_state)); 528 return(EBUSY); 529 } else 530 sc->sc_state |= INIT; 531 532 sc->sc_flags = LPTFLAGS(minor(dev)); 533 534 /* Check for open with BYPASS flag set. */ 535 if (sc->sc_flags & LP_BYPASS) { 536 sc->sc_state = OPEN; 537 return(0); 538 } 539 540 s = spltty(); 541 lprintf(("lp flags 0x%x\n", sc->sc_flags)); 542 port = sc->sc_port; 543 544 /* set IRQ status according to ENABLE_IRQ flag */ 545 if (sc->sc_irq & LP_ENABLE_IRQ) 546 sc->sc_irq |= LP_USE_IRQ; 547 else 548 sc->sc_irq &= ~LP_USE_IRQ; 549 550 /* init printer */ 551#ifndef PC98 552 if ((sc->sc_flags & LP_NO_PRIME) == 0) { 553 if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) { 554 outb(port+lpt_control, 0); 555 sc->sc_primed++; 556 DELAY(500); 557 } 558 } 559 560 outb (port+lpt_control, LPC_SEL|LPC_NINIT); 561 562 /* wait till ready (printer running diagnostics) */ 563 trys = 0; 564 do { 565 /* ran out of waiting for the printer */ 566 if (trys++ >= LPINITRDY*4) { 567 splx(s); 568 sc->sc_state = 0; 569 lprintf(("status %x\n", inb(port+lpt_status))); 570 return (EBUSY); 571 } 572 573 /* wait 1/4 second, give up if we get a signal */ 574 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, "lptinit", hz/4) != 575 EWOULDBLOCK) { 576 sc->sc_state = 0; 577 splx(s); 578 return (EBUSY); 579 } 580 581 /* is printer online and ready for output */ 582 } while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 583 (LPS_SEL|LPS_NBSY|LPS_NERR)); 584 585 sc->sc_control = LPC_SEL|LPC_NINIT; 586 if (sc->sc_flags & LP_AUTOLF) 587 sc->sc_control |= LPC_AUTOL; 588 589 /* enable interrupt if interrupt-driven */ 590 if (sc->sc_irq & LP_USE_IRQ) 591 sc->sc_control |= LPC_ENA; 592 593 outb(port+lpt_control, sc->sc_control); 594#endif 595 596 sc->sc_state = OPEN; 597 sc->sc_inbuf = geteblk(BUFSIZE); 598 sc->sc_xfercnt = 0; 599 splx(s); 600 601 /* only use timeout if using interrupt */ 602 lprintf(("irq %x\n", sc->sc_irq)); 603 if (sc->sc_irq & LP_USE_IRQ) { 604 sc->sc_state |= TOUT; 605 timeout (lptout, (caddr_t)sc, 606 (sc->sc_backoff = hz/LPTOUTINITIAL)); 607 } 608 609 lprintf(("opened.\n")); 610 return(0); 611} 612 613static void 614lptout (void *arg) 615{ 616 struct lpt_softc *sc = arg; 617 int pl; 618 619 lprintf(("T %x ", inb(sc->sc_port+lpt_status))); 620 if (sc->sc_state & OPEN) { 621 sc->sc_backoff++; 622 if (sc->sc_backoff > hz/LPTOUTMAX) 623 sc->sc_backoff = sc->sc_backoff > hz/LPTOUTMAX; 624 timeout (lptout, (caddr_t)sc, sc->sc_backoff); 625 } else 626 sc->sc_state &= ~TOUT; 627 628 if (sc->sc_state & ERROR) 629 sc->sc_state &= ~ERROR; 630 631 /* 632 * Avoid possible hangs do to missed interrupts 633 */ 634 if (sc->sc_xfercnt) { 635 pl = spltty(); 636 lptintr(sc - lpt_sc); 637 splx(pl); 638 } else { 639 sc->sc_state &= ~OBUSY; 640 wakeup((caddr_t)sc); 641 } 642} 643 644/* 645 * lptclose -- close the device, free the local line buffer. 646 * 647 * Check for interrupted write call added. 648 */ 649 650static int 651lptclose(dev_t dev, int flags, int fmt, struct proc *p) 652{ 653 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 654#ifndef PC98 655 int port = sc->sc_port; 656#endif 657 658 if(sc->sc_flags & LP_BYPASS) 659 goto end_close; 660 661 sc->sc_state &= ~OPEN; 662 663#ifndef PC98 664 /* if the last write was interrupted, don't complete it */ 665 if((!(sc->sc_state & INTERRUPTED)) && (sc->sc_irq & LP_USE_IRQ)) 666 while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 667 (LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt) 668 /* wait 1/4 second, give up if we get a signal */ 669 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, 670 "lpclose", hz) != EWOULDBLOCK) 671 break; 672 673 outb(sc->sc_port+lpt_control, LPC_NINIT); 674#endif 675 brelse(sc->sc_inbuf); 676 677end_close: 678 sc->sc_state = 0; 679 sc->sc_xfercnt = 0; 680 lprintf(("closed.\n")); 681 return(0); 682} 683 684/* 685 * pushbytes() 686 * Workhorse for actually spinning and writing bytes to printer 687 * Derived from lpa.c 688 * Originally by ? 689 * 690 * This code is only used when we are polling the port 691 */ 692static int 693pushbytes(struct lpt_softc * sc) 694{ 695 int spin, err, tic; 696 char ch; 697 int port = sc->sc_port; 698 699 lprintf(("p")); 700 /* loop for every character .. */ 701 while (sc->sc_xfercnt > 0) { 702 /* printer data */ 703 ch = *(sc->sc_cp); 704 sc->sc_cp++; 705 sc->sc_xfercnt--; 706 707 /* 708 * Wait for printer ready. 709 * Loop 20 usecs testing BUSY bit, then sleep 710 * for exponentially increasing timeout. (vak) 711 */ 712 for (spin=0; NOT_READY(port+lpt_status) && spin<MAX_SPIN; ++spin) 713 DELAY(1); /* XXX delay is NOT this accurate! */ 714 if (spin >= MAX_SPIN) { 715 tic = 0; 716 while (NOT_READY(port+lpt_status)) { 717 /* 718 * Now sleep, every cycle a 719 * little longer .. 720 */ 721 tic = tic + tic + 1; 722 /* 723 * But no more than 10 seconds. (vak) 724 */ 725 if (tic > MAX_SLEEP) 726 tic = MAX_SLEEP; 727 err = tsleep((caddr_t)sc, LPPRI, 728 "lptpoll", tic); 729 if (err != EWOULDBLOCK) { 730 return (err); 731 } 732 } 733 } 734 735 /* output data */ 736 outb(port+lpt_data, ch); 737#ifdef PC98 738 DELAY(1); 739 outb(port+lpt_control, LPC_PSTB); 740 DELAY(1); 741 outb(port+lpt_control, LPC_NPSTB); 742#else 743 /* strobe */ 744 outb(port+lpt_control, sc->sc_control|LPC_STB); 745 outb(port+lpt_control, sc->sc_control); 746#endif 747 748 } 749 return(0); 750} 751 752/* 753 * lptwrite --copy a line from user space to a local buffer, then call 754 * putc to get the chars moved to the output queue. 755 * 756 * Flagging of interrupted write added. 757 */ 758 759static int 760lptwrite(dev_t dev, struct uio * uio, int ioflag) 761{ 762 register unsigned n; 763 int pl, err; 764 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 765 766 if(sc->sc_flags & LP_BYPASS) { 767 /* we can't do writes in bypass mode */ 768 return(EPERM); 769 } 770 771 sc->sc_state &= ~INTERRUPTED; 772 while ((n = min(BUFSIZE, uio->uio_resid)) != 0) { 773 sc->sc_cp = sc->sc_inbuf->b_data ; 774 uiomove(sc->sc_cp, n, uio); 775 sc->sc_xfercnt = n ; 776 while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) { 777 lprintf(("i")); 778 /* if the printer is ready for a char, */ 779 /* give it one */ 780 if ((sc->sc_state & OBUSY) == 0){ 781 lprintf(("\nC %d. ", sc->sc_xfercnt)); 782 pl = spltty(); 783 lptintr(sc - lpt_sc); 784 (void) splx(pl); 785 } 786 lprintf(("W ")); 787 if (sc->sc_state & OBUSY) 788 if ((err = tsleep ((caddr_t)sc, 789 LPPRI|PCATCH, "lpwrite", 0))) { 790 sc->sc_state |= INTERRUPTED; 791 return(err); 792 } 793 } 794 /* check to see if we must do a polled write */ 795 if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) { 796 lprintf(("p")); 797 if((err = pushbytes(sc))) 798 return(err); 799 } 800 } 801 return(0); 802} 803 804/* 805 * lptintr -- handle printer interrupts which occur when the printer is 806 * ready to accept another char. 807 * 808 * do checking for interrupted write call. 809 */ 810 811static void 812lptintr(int unit) 813{ 814#if defined(INET) || !defined(PC98) 815 struct lpt_softc *sc = lpt_sc + unit; 816#endif 817#ifndef PC98 818 int port = sc->sc_port, sts; 819 int i; 820#endif 821 822#ifdef INET 823 if(sc->sc_if.if_flags & IFF_UP) { 824 lpintr(unit); 825 return; 826 } 827#endif /* INET */ 828 829#ifndef PC98 830 /* 831 * Is printer online and ready for output? 832 * 833 * Avoid falling back to lptout() too quickly. First spin-loop 834 * to see if the printer will become ready ``really soon now''. 835 */ 836 for (i = 0; 837 i < 100 && 838 ((sts=inb(port+lpt_status)) & RDY_MASK) != LP_READY; 839 i++) ; 840 if ((sts & RDY_MASK) == LP_READY) { 841 sc->sc_state = (sc->sc_state | OBUSY) & ~ERROR; 842 sc->sc_backoff = hz/LPTOUTINITIAL; 843 844 if (sc->sc_xfercnt) { 845 /* send char */ 846 /*lprintf(("%x ", *sc->sc_cp)); */ 847 outb(port+lpt_data, *sc->sc_cp++) ; 848 outb(port+lpt_control, sc->sc_control|LPC_STB); 849 /* DELAY(X) */ 850 outb(port+lpt_control, sc->sc_control); 851 852 /* any more data for printer */ 853 if(--(sc->sc_xfercnt) > 0) return; 854 } 855 856 /* 857 * No more data waiting for printer. 858 * Wakeup is not done if write call was interrupted. 859 */ 860 sc->sc_state &= ~OBUSY; 861 if(!(sc->sc_state & INTERRUPTED)) 862 wakeup((caddr_t)sc); 863 lprintf(("w ")); 864 return; 865 } else { /* check for error */ 866 if(((sts & (LPS_NERR | LPS_OUT) ) != LPS_NERR) && 867 (sc->sc_state & OPEN)) 868 sc->sc_state |= ERROR; 869 /* lptout() will jump in and try to restart. */ 870 } 871#endif 872 lprintf(("sts %x ", sts)); 873} 874 875static int 876lptioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p) 877{ 878 int error = 0; 879 struct lpt_softc *sc; 880 u_int unit = LPTUNIT(minor(dev)); 881 u_char old_sc_irq; /* old printer IRQ status */ 882 883 sc = lpt_sc + unit; 884 885 switch (cmd) { 886 case LPT_IRQ : 887 if(sc->sc_irq & LP_HAS_IRQ) { 888 /* 889 * NOTE: 890 * If the IRQ status is changed, 891 * this will only be visible on the 892 * next open. 893 * 894 * If interrupt status changes, 895 * this gets syslog'd. 896 */ 897 old_sc_irq = sc->sc_irq; 898 if(*(int*)data == 0) 899 sc->sc_irq &= (~LP_ENABLE_IRQ); 900 else 901 sc->sc_irq |= LP_ENABLE_IRQ; 902 if (old_sc_irq != sc->sc_irq ) 903 log(LOG_NOTICE, "lpt%c switched to %s mode\n", 904 (char)unit+'0', 905 (sc->sc_irq & LP_ENABLE_IRQ)? 906 "interrupt-driven":"polled"); 907 } else /* polled port */ 908 error = EOPNOTSUPP; 909 break; 910 default: 911 error = ENODEV; 912 } 913 914 return(error); 915} 916 917#ifdef INET 918 919static void 920lpattach (struct lpt_softc *sc, int unit) 921{ 922 struct ifnet *ifp = &sc->sc_if; 923 924 ifp->if_softc = sc; 925 ifp->if_name = "lp"; 926 ifp->if_unit = unit; 927 ifp->if_mtu = LPMTU; 928 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 929 ifp->if_ioctl = lpioctl; 930 ifp->if_output = lpoutput; 931 ifp->if_type = IFT_PARA; 932 ifp->if_hdrlen = 0; 933 ifp->if_addrlen = 0; 934 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 935 if_attach(ifp); 936 printf("lp%d: TCP/IP capable interface\n", unit); 937 938 bpfattach(ifp, DLT_NULL, LPIPHDRLEN); 939} 940 941#ifndef PC98 942/* 943 * Build the translation tables for the LPIP (BSD unix) protocol. 944 * We don't want to calculate these nasties in our tight loop, so we 945 * precalculate them when we initialize. 946 */ 947static int 948lpinittables (void) 949{ 950 int i; 951 952 if (!txmith) 953 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 954 955 if (!txmith) 956 return 1; 957 958 if (!ctxmith) 959 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 960 961 if (!ctxmith) 962 return 1; 963 964 for (i=0; i < LPIPTBLSIZE; i++) { 965 ctxmith[i] = (i & 0xF0) >> 4; 966 ctxmitl[i] = 0x10 | (i & 0x0F); 967 ctrecvh[i] = (i & 0x78) << 1; 968 ctrecvl[i] = (i & 0x78) >> 3; 969 } 970 971 for (i=0; i < LPIPTBLSIZE; i++) { 972 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 973 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 974 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 975 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 976 } 977 978 return 0; 979} 980#endif /* PC98 */ 981 982/* 983 * Process an ioctl request. 984 */ 985 986static int 987lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 988{ 989 struct lpt_softc *sc = lpt_sc + ifp->if_unit; 990 struct ifaddr *ifa = (struct ifaddr *)data; 991 struct ifreq *ifr = (struct ifreq *)data; 992 u_char *ptr; 993 994 switch (cmd) { 995 996 case SIOCSIFDSTADDR: 997 case SIOCAIFADDR: 998 case SIOCSIFADDR: 999 if (ifa->ifa_addr->sa_family != AF_INET) 1000 return EAFNOSUPPORT; 1001 ifp->if_flags |= IFF_UP; 1002 /* FALLTHROUGH */ 1003 case SIOCSIFFLAGS: 1004 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 1005 outb(sc->sc_port + lpt_control, 0x00); 1006 ifp->if_flags &= ~IFF_RUNNING; 1007 break; 1008 } 1009#ifdef PC98 1010 /* XXX */ 1011 return ENOBUFS; 1012#else 1013 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 1014 if (lpinittables()) 1015 return ENOBUFS; 1016 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 1017 M_DEVBUF, M_WAITOK); 1018 if (!sc->sc_ifbuf) 1019 return ENOBUFS; 1020 1021 outb(sc->sc_port + lpt_control, LPC_ENA); 1022 ifp->if_flags |= IFF_RUNNING; 1023 } 1024 break; 1025#endif 1026 case SIOCSIFMTU: 1027 ptr = sc->sc_ifbuf; 1028 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 1029 if (!sc->sc_ifbuf) { 1030 sc->sc_ifbuf = ptr; 1031 return ENOBUFS; 1032 } 1033 if (ptr) 1034 free(ptr,M_DEVBUF); 1035 sc->sc_if.if_mtu = ifr->ifr_mtu; 1036 break; 1037 1038 case SIOCGIFMTU: 1039 ifr->ifr_mtu = sc->sc_if.if_mtu; 1040 break; 1041 1042 case SIOCADDMULTI: 1043 case SIOCDELMULTI: 1044 if (ifr == 0) { 1045 return EAFNOSUPPORT; /* XXX */ 1046 } 1047 switch (ifr->ifr_addr.sa_family) { 1048 1049#ifdef INET 1050 case AF_INET: 1051 break; 1052#endif 1053 1054 default: 1055 return EAFNOSUPPORT; 1056 } 1057 break; 1058 1059 default: 1060 lprintf(("LP:ioctl(0x%lx)\n", cmd)); 1061 return EINVAL; 1062 } 1063 return 0; 1064} 1065 1066static __inline int 1067clpoutbyte (u_char byte, int spin, int data_port, int status_port) 1068{ 1069 outb(data_port, ctxmitl[byte]); 1070 while (inb(status_port) & CLPIP_SHAKE) 1071 if (--spin == 0) { 1072 return 1; 1073 } 1074 outb(data_port, ctxmith[byte]); 1075 while (!(inb(status_port) & CLPIP_SHAKE)) 1076 if (--spin == 0) { 1077 return 1; 1078 } 1079 return 0; 1080} 1081 1082static __inline int 1083clpinbyte (int spin, int data_port, int status_port) 1084{ 1085 int c, cl; 1086 1087 while((inb(status_port) & CLPIP_SHAKE)) 1088 if(!--spin) { 1089 return -1; 1090 } 1091 cl = inb(status_port); 1092 outb(data_port, 0x10); 1093 1094 while(!(inb(status_port) & CLPIP_SHAKE)) 1095 if(!--spin) { 1096 return -1; 1097 } 1098 c = inb(status_port); 1099 outb(data_port, 0x00); 1100 1101 return (ctrecvl[cl] | ctrecvh[c]); 1102} 1103 1104static void 1105lpintr (int unit) 1106{ 1107 struct lpt_softc *sc = lpt_sc + unit; 1108 register int lpt_data_port = sc->sc_port + lpt_data; 1109 register int lpt_stat_port = sc->sc_port + lpt_status; 1110 int lpt_ctrl_port = sc->sc_port + lpt_control; 1111 int len, s, j; 1112 u_char *bp; 1113 u_char c, cl; 1114 struct mbuf *top; 1115 1116 s = splhigh(); 1117 1118 if (sc->sc_if.if_flags & IFF_LINK0) { 1119 1120 /* Ack. the request */ 1121 outb(lpt_data_port, 0x01); 1122 1123 /* Get the packet length */ 1124 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1125 if (j == -1) 1126 goto err; 1127 len = j; 1128 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1129 if (j == -1) 1130 goto err; 1131 len = len + (j << 8); 1132 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 1133 goto err; 1134 1135 bp = sc->sc_ifbuf; 1136 1137 while (len--) { 1138 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1139 if (j == -1) { 1140 goto err; 1141 } 1142 *bp++ = j; 1143 } 1144 /* Get and ignore checksum */ 1145 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1146 if (j == -1) { 1147 goto err; 1148 } 1149 1150 len = bp - sc->sc_ifbuf; 1151 if (len <= CLPIPHDRLEN) 1152 goto err; 1153 1154 sc->sc_iferrs = 0; 1155 1156 if (IF_QFULL(&ipintrq)) { 1157 lprintf(("DROP")); 1158 IF_DROP(&ipintrq); 1159 goto done; 1160 } 1161 len -= CLPIPHDRLEN; 1162 sc->sc_if.if_ipackets++; 1163 sc->sc_if.if_ibytes += len; 1164 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 1165 if (top) { 1166 IF_ENQUEUE(&ipintrq, top); 1167 schednetisr(NETISR_IP); 1168 } 1169 goto done; 1170 } 1171 while ((inb(lpt_stat_port) & LPIP_SHAKE)) { 1172 len = sc->sc_if.if_mtu + LPIPHDRLEN; 1173 bp = sc->sc_ifbuf; 1174 while (len--) { 1175 1176 cl = inb(lpt_stat_port); 1177 outb(lpt_data_port, 8); 1178 1179 j = LPMAXSPIN2; 1180 while((inb(lpt_stat_port) & LPIP_SHAKE)) 1181 if(!--j) goto err; 1182 1183 c = inb(lpt_stat_port); 1184 outb(lpt_data_port, 0); 1185 1186 *bp++= trecvh[cl] | trecvl[c]; 1187 1188 j = LPMAXSPIN2; 1189 while (!((cl=inb(lpt_stat_port)) & LPIP_SHAKE)) { 1190 if (cl != c && 1191 (((cl = inb(lpt_stat_port)) ^ 0xb8) & 0xf8) == 1192 (c & 0xf8)) 1193 goto end; 1194 if (!--j) goto err; 1195 } 1196 } 1197 1198 end: 1199 len = bp - sc->sc_ifbuf; 1200 if (len <= LPIPHDRLEN) 1201 goto err; 1202 1203 sc->sc_iferrs = 0; 1204 1205 if (IF_QFULL(&ipintrq)) { 1206 lprintf(("DROP")); 1207 IF_DROP(&ipintrq); 1208 goto done; 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_ENQUEUE(&ipintrq, top); 1219 schednetisr(NETISR_IP); 1220 } 1221 } 1222 goto done; 1223 1224 err: 1225 outb(lpt_data_port, 0); 1226 lprintf(("R")); 1227 sc->sc_if.if_ierrors++; 1228 sc->sc_iferrs++; 1229 1230 /* 1231 * We are not able to send receive anything for now, 1232 * so stop wasting our time 1233 */ 1234 if (sc->sc_iferrs > LPMAXERRS) { 1235 printf("lp%d: Too many errors, Going off-line.\n", unit); 1236 outb(lpt_ctrl_port, 0x00); 1237 sc->sc_if.if_flags &= ~IFF_RUNNING; 1238 sc->sc_iferrs=0; 1239 } 1240 1241 done: 1242 splx(s); 1243 return; 1244} 1245 1246static __inline int 1247lpoutbyte (u_char byte, int spin, int data_port, int status_port) 1248{ 1249 outb(data_port, txmith[byte]); 1250 while (!(inb(status_port) & LPIP_SHAKE)) 1251 if (--spin == 0) 1252 return 1; 1253 outb(data_port, txmitl[byte]); 1254 while (inb(status_port) & LPIP_SHAKE) 1255 if (--spin == 0) 1256 return 1; 1257 return 0; 1258} 1259 1260static int 1261lpoutput (struct ifnet *ifp, struct mbuf *m, 1262 struct sockaddr *dst, struct rtentry *rt) 1263{ 1264 register int lpt_data_port = lpt_sc[ifp->if_unit].sc_port + lpt_data; 1265 register int lpt_stat_port = lpt_sc[ifp->if_unit].sc_port + lpt_status; 1266#ifndef PC98 1267 int lpt_ctrl_port = lpt_sc[ifp->if_unit].sc_port + lpt_control; 1268#endif 1269 1270 int s, err; 1271 struct mbuf *mm; 1272 u_char *cp = "\0\0"; 1273 u_char chksum = 0; 1274 int count = 0; 1275 int i; 1276 int spin; 1277 1278 /* We need a sensible value if we abort */ 1279 cp++; 1280 ifp->if_flags |= IFF_RUNNING; 1281 1282 err = 1; /* assume we're aborting because of an error */ 1283 1284 s = splhigh(); 1285 1286#ifndef PC98 1287 /* Suspend (on laptops) or receive-errors might have taken us offline */ 1288 outb(lpt_ctrl_port, LPC_ENA); 1289#endif 1290 1291 if (ifp->if_flags & IFF_LINK0) { 1292 1293 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1294 lprintf(("&")); 1295 lptintr(ifp->if_unit); 1296 } 1297 1298 /* Alert other end to pending packet */ 1299 spin = LPMAXSPIN1; 1300 outb(lpt_data_port, 0x08); 1301 while ((inb(lpt_stat_port) & 0x08) == 0) 1302 if (--spin == 0) { 1303 goto nend; 1304 } 1305 1306 /* Calculate length of packet, then send that */ 1307 1308 count += 14; /* Ethernet header len */ 1309 1310 mm = m; 1311 for (mm = m; mm; mm = mm->m_next) { 1312 count += mm->m_len; 1313 } 1314 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1315 goto nend; 1316 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1317 goto nend; 1318 1319 /* Send dummy ethernet header */ 1320 for (i = 0; i < 12; i++) { 1321 if (clpoutbyte(i, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1322 goto nend; 1323 chksum += i; 1324 } 1325 1326 if (clpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1327 goto nend; 1328 if (clpoutbyte(0x00, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1329 goto nend; 1330 chksum += 0x08 + 0x00; /* Add into checksum */ 1331 1332 mm = m; 1333 do { 1334 cp = mtod(mm, u_char *); 1335 while (mm->m_len--) { 1336 chksum += *cp; 1337 if (clpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1338 goto nend; 1339 } 1340 } while ((mm = mm->m_next)); 1341 1342 /* Send checksum */ 1343 if (clpoutbyte(chksum, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1344 goto nend; 1345 1346 /* Go quiescent */ 1347 outb(lpt_data_port, 0); 1348 1349 err = 0; /* No errors */ 1350 1351 nend: 1352 if (err) { /* if we didn't timeout... */ 1353 ifp->if_oerrors++; 1354 lprintf(("X")); 1355 } else { 1356 ifp->if_opackets++; 1357 ifp->if_obytes += m->m_pkthdr.len; 1358 } 1359 1360 m_freem(m); 1361 1362 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1363 lprintf(("^")); 1364 lptintr(ifp->if_unit); 1365 } 1366 (void) splx(s); 1367 return 0; 1368 } 1369 1370 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1371 lprintf(("&")); 1372 lptintr(ifp->if_unit); 1373 } 1374 1375 if (lpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1376 goto end; 1377 if (lpoutbyte(0x00, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1378 goto end; 1379 1380 mm = m; 1381 do { 1382 cp = mtod(mm,u_char *); 1383 while (mm->m_len--) 1384 if (lpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1385 goto end; 1386 } while ((mm = mm->m_next)); 1387 1388 err = 0; /* no errors were encountered */ 1389 1390 end: 1391 --cp; 1392 outb(lpt_data_port, txmitl[*cp] ^ 0x17); 1393 1394 if (err) { /* if we didn't timeout... */ 1395 ifp->if_oerrors++; 1396 lprintf(("X")); 1397 } else { 1398 ifp->if_opackets++; 1399 ifp->if_obytes += m->m_pkthdr.len; 1400 if (ifp->if_bpf) { 1401 /* 1402 * We need to prepend the packet type as 1403 * a two byte field. Cons up a dummy header 1404 * to pacify bpf. This is safe because bpf 1405 * will only read from the mbuf (i.e., it won't 1406 * try to free it or keep a pointer to it). 1407 */ 1408 struct mbuf m0; 1409 u_short hdr = 0x800; 1410 1411 m0.m_next = m; 1412 m0.m_len = 2; 1413 m0.m_data = (char *)&hdr; 1414 1415 bpf_mtap(ifp, &m0); 1416 } 1417 } 1418 1419 m_freem(m); 1420 1421 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1422 lprintf(("^")); 1423 lptintr(ifp->if_unit); 1424 } 1425 1426 (void) splx(s); 1427 return 0; 1428} 1429 1430#endif /* INET */ 1431 1432static int lpt_devsw_installed; 1433 1434static void lpt_drvinit(void *unused) 1435{ 1436 1437 if( ! lpt_devsw_installed ) { 1438 cdevsw_add(&lpt_cdevsw); 1439 lpt_devsw_installed = 1; 1440 } 1441} 1442#ifndef LPT_DRVINIT_AT_ATTACH 1443SYSINIT(lptdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,lpt_drvinit,NULL) 1444#endif 1445