olpt.c revision 51646
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 51646 1999-09-25 12:06:01Z phk $ 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#endif 109 110#include <sys/param.h> 111#include <sys/systm.h> 112#include <sys/conf.h> 113#include <sys/buf.h> 114#include <sys/kernel.h> 115#include <sys/uio.h> 116#include <sys/syslog.h> 117#include <machine/clock.h> 118#include <machine/lpt.h> 119 120#include <vm/vm.h> 121#include <vm/vm_param.h> 122#include <vm/pmap.h> 123 124#ifdef PC98 125#include <pc98/pc98/pc98.h> 126#else 127#include <i386/isa/isa.h> 128#endif 129#include <i386/isa/isa_device.h> 130#include <i386/isa/lptreg.h> 131 132#ifdef INET 133#include <sys/malloc.h> 134#include <sys/mbuf.h> 135#include <sys/socket.h> 136#include <sys/sockio.h> 137 138#include <net/if.h> 139#include <net/if_types.h> 140#include <net/netisr.h> 141#include <netinet/in.h> 142#include <netinet/in_var.h> 143#include <net/bpf.h> 144#endif /* INET */ 145 146 147#define LPINITRDY 4 /* wait up to 4 seconds for a ready */ 148#define LPTOUTINITIAL 10 /* initial timeout to wait for ready 1/10 s */ 149#define LPTOUTMAX 1 /* maximal timeout 1 s */ 150#define LPPRI (PZERO+8) 151#define BUFSIZE 1024 152 153#ifdef INET 154#ifndef LPMTU /* MTU for the lp# interfaces */ 155#define LPMTU 1500 156#endif 157 158#ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 159#define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 160#endif 161 162#ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 163#define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 164#endif 165 166#ifndef LPMAXERRS /* Max errors before !RUNNING */ 167#define LPMAXERRS 100 168#endif 169 170#define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 171#define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 172#define MLPIPHDRLEN CLPIPHDRLEN 173 174#define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 175#define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 176#if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 177#define MLPIPHDRLEN LPIPHDRLEN 178#endif 179 180#define LPIPTBLSIZE 256 /* Size of octet translation table */ 181 182#endif /* INET */ 183 184#ifndef PC98 185/* BIOS printer list - used by BIOS probe*/ 186#define BIOS_LPT_PORTS 0x408 187#define BIOS_PORTS (short *)(KERNBASE+BIOS_LPT_PORTS) 188#define BIOS_MAX_LPT 4 189#endif 190 191 192#ifndef DEBUG 193#define lprintf(args) 194#else 195#define lprintf(args) do { \ 196 if (lptflag) \ 197 printf args; \ 198 } while (0) 199static int volatile lptflag = 1; 200#endif 201 202#define LPTUNIT(s) ((s)&0x03) 203#define LPTFLAGS(s) ((s)&0xfc) 204 205static struct lpt_softc { 206 int sc_port; 207 short sc_state; 208 /* default case: negative prime, negative ack, handshake strobe, 209 prime once */ 210 u_char sc_control; 211 char sc_flags; 212#define LP_POS_INIT 0x04 /* if we are a postive init signal */ 213#define LP_POS_ACK 0x08 /* if we are a positive going ack */ 214#define LP_NO_PRIME 0x10 /* don't prime the printer at all */ 215#define LP_PRIMEOPEN 0x20 /* prime on every open */ 216#define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */ 217#define LP_BYPASS 0x80 /* bypass printer ready checks */ 218 struct buf *sc_inbuf; 219 short sc_xfercnt ; 220 char sc_primed; 221 char *sc_cp ; 222 u_char sc_irq ; /* IRQ status of port */ 223#define LP_HAS_IRQ 0x01 /* we have an irq available */ 224#define LP_USE_IRQ 0x02 /* we are using our irq */ 225#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */ 226 u_char sc_backoff ; /* time to call lptout() again */ 227 228#ifdef INET 229 struct ifnet sc_if; 230 u_char *sc_ifbuf; 231 int sc_iferrs; 232#endif 233} lpt_sc[NOLPT] ; 234 235/* bits for state */ 236#define OPEN (1<<0) /* device is open */ 237#define ASLP (1<<1) /* awaiting draining of printer */ 238#define ERROR (1<<2) /* error was received from printer */ 239#define OBUSY (1<<3) /* printer is busy doing output */ 240#define LPTOUT (1<<4) /* timeout while not selected */ 241#define TOUT (1<<5) /* timeout while not selected */ 242#define INIT (1<<6) /* waiting to initialize for open */ 243#define INTERRUPTED (1<<7) /* write call was interrupted */ 244 245 246/* status masks to interrogate printer status */ 247#define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */ 248#define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR) 249 250/* Printer Ready condition - from lpa.c */ 251/* Only used in polling code */ 252#ifdef PC98 253#define NOT_READY(x) ((inb(x) & LPS_NBSY) != LPS_NBSY) 254#else /* IBM-PC */ 255#define LPS_INVERT (LPS_NBSY | LPS_NACK | LPS_SEL | LPS_NERR) 256#define LPS_MASK (LPS_NBSY | LPS_NACK | LPS_OUT | LPS_SEL | LPS_NERR) 257#define NOT_READY(x) ((inb(x)^LPS_INVERT)&LPS_MASK) 258#endif 259 260#define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */ 261#define MAX_SPIN 20 /* Max delay for device ready in usecs */ 262 263static timeout_t lptout; 264static int lptprobe (struct isa_device *dvp); 265static int lptattach (struct isa_device *isdp); 266static ointhand2_t lptintr; 267 268#ifdef INET 269 270/* Tables for the lp# interface */ 271static u_char *txmith; 272#define txmitl (txmith+(1*LPIPTBLSIZE)) 273#define trecvh (txmith+(2*LPIPTBLSIZE)) 274#define trecvl (txmith+(3*LPIPTBLSIZE)) 275 276static u_char *ctxmith; 277#define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 278#define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 279#define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 280 281/* Functions for the lp# interface */ 282static void lpattach(struct lpt_softc *,int); 283#ifndef PC98 284static int lpinittables(void); 285#endif 286static int lpioctl(struct ifnet *, u_long, caddr_t); 287static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 288 struct rtentry *); 289static void lpintr(int); 290#endif /* INET */ 291 292struct isa_driver olptdriver = { 293 lptprobe, lptattach, "olpt" 294}; 295 296static d_open_t lptopen; 297static d_close_t lptclose; 298static d_write_t lptwrite; 299static d_ioctl_t lptioctl; 300 301#define CDEV_MAJOR 16 302static struct cdevsw lpt_cdevsw = { 303 /* open */ lptopen, 304 /* close */ lptclose, 305 /* read */ noread, 306 /* write */ lptwrite, 307 /* ioctl */ lptioctl, 308 /* stop */ nostop, 309 /* reset */ noreset, 310 /* devtotty */ nodevtotty, 311 /* poll */ nopoll, 312 /* mmap */ nommap, 313 /* strategy */ nostrategy, 314 /* name */ "lpt", 315 /* parms */ noparms, 316 /* maj */ CDEV_MAJOR, 317 /* dump */ nodump, 318 /* psize */ nopsize, 319 /* flags */ 0, 320 /* maxio */ 0, 321 /* bmaj */ -1 322}; 323 324#ifndef PC98 325/* 326 * Internal routine to lptprobe to do port tests of one byte value 327 */ 328static int 329lpt_port_test (int port, u_char data, u_char mask) 330{ 331 int temp, timeout; 332 333 data = data & mask; 334 outb(port, data); 335 timeout = 10000; 336 do { 337 DELAY(10); 338 temp = inb(port) & mask; 339 } 340 while (temp != data && --timeout); 341 lprintf(("Port 0x%x\tout=%x\tin=%x\ttout=%d\n", 342 port, data, temp, timeout)); 343 return (temp == data); 344} 345#endif /* PC98 */ 346 347/* 348 * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94 349 * Based partially on Rod Grimes' printer probe 350 * 351 * Logic: 352 * 1) If no port address was given, use the bios detected ports 353 * and autodetect what ports the printers are on. 354 * 2) Otherwise, probe the data port at the address given, 355 * using the method in Rod Grimes' port probe. 356 * (Much code ripped off directly from Rod's probe.) 357 * 358 * Comments from Rod's probe: 359 * Logic: 360 * 1) You should be able to write to and read back the same value 361 * to the data port. Do an alternating zeros, alternating ones, 362 * walking zero, and walking one test to check for stuck bits. 363 * 364 * 2) You should be able to write to and read back the same value 365 * to the control port lower 5 bits, the upper 3 bits are reserved 366 * per the IBM PC technical reference manauls and different boards 367 * do different things with them. Do an alternating zeros, alternating 368 * ones, walking zero, and walking one test to check for stuck bits. 369 * 370 * Some printers drag the strobe line down when the are powered off 371 * so this bit has been masked out of the control port test. 372 * 373 * XXX Some printers may not like a fast pulse on init or strobe, I 374 * don't know at this point, if that becomes a problem these bits 375 * should be turned off in the mask byte for the control port test. 376 * 377 * We are finally left with a mask of 0x14, due to some printers 378 * being adamant about holding other bits high ........ 379 * 380 * Before probing the control port, we write a 0 to the data port - 381 * If not, some printers chuck out garbage when the strobe line 382 * gets toggled. 383 * 384 * 3) Set the data and control ports to a value of 0 385 * 386 * This probe routine has been tested on Epson Lx-800, HP LJ3P, 387 * Epson FX-1170 and C.Itoh 8510RM 388 * printers. 389 * Quick exit on fail added. 390 */ 391 392int 393lptprobe(struct isa_device *dvp) 394{ 395#ifdef PC98 396#define PC98_OLD_LPT 0x40 397#define PC98_IEEE_1284_FUNCTION 0x149 398 unsigned int pc98_ieee_mode, tmp; 399 400 if (dvp->id_iobase == PC98_OLD_LPT) { 401 tmp = inb(PC98_IEEE_1284_FUNCTION); 402 pc98_ieee_mode = tmp; 403 if ((tmp & 0x10) == 0x10) { 404 outb(PC98_IEEE_1284_FUNCTION, tmp & ~0x10); 405 tmp = inb(PC98_IEEE_1284_FUNCTION); 406 if ((tmp & 0x10) != 0x10) { 407 outb(PC98_IEEE_1284_FUNCTION, pc98_ieee_mode); 408 return 0; 409 } 410 } 411 } 412 return 8; 413#else 414 int port; 415 static short next_bios_lpt = 0; 416 int status; 417 static u_char testbyte[18] = { 418 0x55, /* alternating zeros */ 419 0xaa, /* alternating ones */ 420 0xfe, 0xfd, 0xfb, 0xf7, 421 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */ 422 0x01, 0x02, 0x04, 0x08, 423 0x10, 0x20, 0x40, 0x80 /* walking one */ 424 }; 425 int i; 426 427 /* 428 * Make sure there is some way for lptopen to see that 429 * the port is not configured 430 * This 0 will remain if the port isn't attached 431 */ 432 (lpt_sc + dvp->id_unit)->sc_port = 0; 433 434 status = IO_LPTSIZE; 435 /* If port not specified, use bios list */ 436 if(dvp->id_iobase < 0) { /* port? */ 437 if((next_bios_lpt < BIOS_MAX_LPT) && 438 (*(BIOS_PORTS+next_bios_lpt) != 0) ) { 439 dvp->id_iobase = *(BIOS_PORTS+next_bios_lpt++); 440 goto end_probe; 441 } else 442 return (0); 443 } 444 445 /* Port was explicitly specified */ 446 /* This allows probing of ports unknown to the BIOS */ 447 port = dvp->id_iobase + lpt_data; 448 for (i = 0; i < 18; i++) { 449 if (!lpt_port_test(port, testbyte[i], 0xff)) { 450 status = 0; 451 goto end_probe; 452 } 453 } 454 455end_probe: 456 /* write 0's to control and data ports */ 457 outb(dvp->id_iobase+lpt_data, 0); 458 outb(dvp->id_iobase+lpt_control, 0); 459 460 return (status); 461#endif 462} 463 464/* XXX Todo - try and detect if interrupt is working */ 465int 466lptattach(struct isa_device *isdp) 467{ 468 struct lpt_softc *sc; 469 int unit; 470 471 isdp->id_ointr = lptintr; 472 unit = isdp->id_unit; 473 sc = lpt_sc + unit; 474 sc->sc_port = isdp->id_iobase; 475 sc->sc_primed = 0; /* not primed yet */ 476#ifdef PC98 477 outb(sc->sc_port+lpt_pstb_ctrl, LPC_DIS_PSTB); /* PSTB disable */ 478 outb(sc->sc_port+lpt_control, LPC_MODE8255); /* 8255 mode set */ 479 outb(sc->sc_port+lpt_control, LPC_NIRQ8); /* IRQ8 inactive */ 480 outb(sc->sc_port+lpt_control, LPC_NPSTB); /* PSTB inactive */ 481 outb(sc->sc_port+lpt_pstb_ctrl, LPC_EN_PSTB); /* PSTB enable */ 482#else 483 outb(sc->sc_port+lpt_control, LPC_NINIT); 484#endif 485 486 /* check if we can use interrupt */ 487 lprintf(("oldirq %x\n", sc->sc_irq)); 488 if (isdp->id_irq) { 489 sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ; 490 printf("lpt%d: Interrupt-driven port\n", unit); 491#ifdef INET 492 lpattach(sc, unit); 493#endif 494 } else { 495 sc->sc_irq = 0; 496 lprintf(("lpt%d: Polled port\n", unit)); 497 } 498 lprintf(("irq %x\n", sc->sc_irq)); 499 500 /* XXX what to do about the flags in the minor number? */ 501 make_dev(&lpt_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit); 502 make_dev(&lpt_cdevsw, unit | LP_BYPASS, 503 UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit); 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 struct lpt_softc *sc = lpt_sc + unit; 823#ifndef PC98 824 int port = sc->sc_port, sts; 825 int i; 826#endif 827 828#ifdef INET 829 if(sc->sc_if.if_flags & IFF_UP) { 830 lpintr(unit); 831 return; 832 } 833#endif /* INET */ 834 835#ifndef PC98 836 /* 837 * Is printer online and ready for output? 838 * 839 * Avoid falling back to lptout() too quickly. First spin-loop 840 * to see if the printer will become ready ``really soon now''. 841 */ 842 for (i = 0; 843 i < 100 && 844 ((sts=inb(port+lpt_status)) & RDY_MASK) != LP_READY; 845 i++) ; 846 if ((sts & RDY_MASK) == LP_READY) { 847 sc->sc_state = (sc->sc_state | OBUSY) & ~ERROR; 848 sc->sc_backoff = hz/LPTOUTINITIAL; 849 850 if (sc->sc_xfercnt) { 851 /* send char */ 852 /*lprintf(("%x ", *sc->sc_cp)); */ 853 outb(port+lpt_data, *sc->sc_cp++) ; 854 outb(port+lpt_control, sc->sc_control|LPC_STB); 855 /* DELAY(X) */ 856 outb(port+lpt_control, sc->sc_control); 857 858 /* any more data for printer */ 859 if(--(sc->sc_xfercnt) > 0) return; 860 } 861 862 /* 863 * No more data waiting for printer. 864 * Wakeup is not done if write call was interrupted. 865 */ 866 sc->sc_state &= ~OBUSY; 867 if(!(sc->sc_state & INTERRUPTED)) 868 wakeup((caddr_t)sc); 869 lprintf(("w ")); 870 return; 871 } else { /* check for error */ 872 if(((sts & (LPS_NERR | LPS_OUT) ) != LPS_NERR) && 873 (sc->sc_state & OPEN)) 874 sc->sc_state |= ERROR; 875 /* lptout() will jump in and try to restart. */ 876 } 877#endif 878 lprintf(("sts %x ", sts)); 879} 880 881static int 882lptioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p) 883{ 884 int error = 0; 885 struct lpt_softc *sc; 886 u_int unit = LPTUNIT(minor(dev)); 887 u_char old_sc_irq; /* old printer IRQ status */ 888 889 sc = lpt_sc + unit; 890 891 switch (cmd) { 892 case LPT_IRQ : 893 if(sc->sc_irq & LP_HAS_IRQ) { 894 /* 895 * NOTE: 896 * If the IRQ status is changed, 897 * this will only be visible on the 898 * next open. 899 * 900 * If interrupt status changes, 901 * this gets syslog'd. 902 */ 903 old_sc_irq = sc->sc_irq; 904 if(*(int*)data == 0) 905 sc->sc_irq &= (~LP_ENABLE_IRQ); 906 else 907 sc->sc_irq |= LP_ENABLE_IRQ; 908 if (old_sc_irq != sc->sc_irq ) 909 log(LOG_NOTICE, "lpt%c switched to %s mode\n", 910 (char)unit+'0', 911 (sc->sc_irq & LP_ENABLE_IRQ)? 912 "interrupt-driven":"polled"); 913 } else /* polled port */ 914 error = EOPNOTSUPP; 915 break; 916 default: 917 error = ENODEV; 918 } 919 920 return(error); 921} 922 923#ifdef INET 924 925static void 926lpattach (struct lpt_softc *sc, int unit) 927{ 928 struct ifnet *ifp = &sc->sc_if; 929 930 ifp->if_softc = sc; 931 ifp->if_name = "lp"; 932 ifp->if_unit = unit; 933 ifp->if_mtu = LPMTU; 934 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 935 ifp->if_ioctl = lpioctl; 936 ifp->if_output = lpoutput; 937 ifp->if_type = IFT_PARA; 938 ifp->if_hdrlen = 0; 939 ifp->if_addrlen = 0; 940 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 941 if_attach(ifp); 942 printf("lp%d: TCP/IP capable interface\n", unit); 943 944 bpfattach(ifp, DLT_NULL, LPIPHDRLEN); 945} 946 947#ifndef PC98 948/* 949 * Build the translation tables for the LPIP (BSD unix) protocol. 950 * We don't want to calculate these nasties in our tight loop, so we 951 * precalculate them when we initialize. 952 */ 953static int 954lpinittables (void) 955{ 956 int i; 957 958 if (!txmith) 959 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 960 961 if (!txmith) 962 return 1; 963 964 if (!ctxmith) 965 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 966 967 if (!ctxmith) 968 return 1; 969 970 for (i=0; i < LPIPTBLSIZE; i++) { 971 ctxmith[i] = (i & 0xF0) >> 4; 972 ctxmitl[i] = 0x10 | (i & 0x0F); 973 ctrecvh[i] = (i & 0x78) << 1; 974 ctrecvl[i] = (i & 0x78) >> 3; 975 } 976 977 for (i=0; i < LPIPTBLSIZE; i++) { 978 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 979 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 980 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 981 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 982 } 983 984 return 0; 985} 986#endif /* PC98 */ 987 988/* 989 * Process an ioctl request. 990 */ 991 992static int 993lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 994{ 995 struct lpt_softc *sc = lpt_sc + ifp->if_unit; 996 struct ifaddr *ifa = (struct ifaddr *)data; 997 struct ifreq *ifr = (struct ifreq *)data; 998 u_char *ptr; 999 1000 switch (cmd) { 1001 1002 case SIOCSIFDSTADDR: 1003 case SIOCAIFADDR: 1004 case SIOCSIFADDR: 1005 if (ifa->ifa_addr->sa_family != AF_INET) 1006 return EAFNOSUPPORT; 1007 ifp->if_flags |= IFF_UP; 1008 /* FALLTHROUGH */ 1009 case SIOCSIFFLAGS: 1010 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 1011 outb(sc->sc_port + lpt_control, 0x00); 1012 ifp->if_flags &= ~IFF_RUNNING; 1013 break; 1014 } 1015#ifdef PC98 1016 /* XXX */ 1017 return ENOBUFS; 1018#else 1019 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 1020 if (lpinittables()) 1021 return ENOBUFS; 1022 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 1023 M_DEVBUF, M_WAITOK); 1024 if (!sc->sc_ifbuf) 1025 return ENOBUFS; 1026 1027 outb(sc->sc_port + lpt_control, LPC_ENA); 1028 ifp->if_flags |= IFF_RUNNING; 1029 } 1030 break; 1031#endif 1032 case SIOCSIFMTU: 1033 ptr = sc->sc_ifbuf; 1034 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 1035 if (!sc->sc_ifbuf) { 1036 sc->sc_ifbuf = ptr; 1037 return ENOBUFS; 1038 } 1039 if (ptr) 1040 free(ptr,M_DEVBUF); 1041 sc->sc_if.if_mtu = ifr->ifr_mtu; 1042 break; 1043 1044 case SIOCGIFMTU: 1045 ifr->ifr_mtu = sc->sc_if.if_mtu; 1046 break; 1047 1048 case SIOCADDMULTI: 1049 case SIOCDELMULTI: 1050 if (ifr == 0) { 1051 return EAFNOSUPPORT; /* XXX */ 1052 } 1053 switch (ifr->ifr_addr.sa_family) { 1054 1055#ifdef INET 1056 case AF_INET: 1057 break; 1058#endif 1059 1060 default: 1061 return EAFNOSUPPORT; 1062 } 1063 break; 1064 1065 default: 1066 lprintf(("LP:ioctl(0x%lx)\n", cmd)); 1067 return EINVAL; 1068 } 1069 return 0; 1070} 1071 1072static __inline int 1073clpoutbyte (u_char byte, int spin, int data_port, int status_port) 1074{ 1075 outb(data_port, ctxmitl[byte]); 1076 while (inb(status_port) & CLPIP_SHAKE) 1077 if (--spin == 0) { 1078 return 1; 1079 } 1080 outb(data_port, ctxmith[byte]); 1081 while (!(inb(status_port) & CLPIP_SHAKE)) 1082 if (--spin == 0) { 1083 return 1; 1084 } 1085 return 0; 1086} 1087 1088static __inline int 1089clpinbyte (int spin, int data_port, int status_port) 1090{ 1091 int c, cl; 1092 1093 while((inb(status_port) & CLPIP_SHAKE)) 1094 if(!--spin) { 1095 return -1; 1096 } 1097 cl = inb(status_port); 1098 outb(data_port, 0x10); 1099 1100 while(!(inb(status_port) & CLPIP_SHAKE)) 1101 if(!--spin) { 1102 return -1; 1103 } 1104 c = inb(status_port); 1105 outb(data_port, 0x00); 1106 1107 return (ctrecvl[cl] | ctrecvh[c]); 1108} 1109 1110static void 1111lpintr (int unit) 1112{ 1113 struct lpt_softc *sc = lpt_sc + unit; 1114 register int lpt_data_port = sc->sc_port + lpt_data; 1115 register int lpt_stat_port = sc->sc_port + lpt_status; 1116 int lpt_ctrl_port = sc->sc_port + lpt_control; 1117 int len, s, j; 1118 u_char *bp; 1119 u_char c, cl; 1120 struct mbuf *top; 1121 1122 s = splhigh(); 1123 1124 if (sc->sc_if.if_flags & IFF_LINK0) { 1125 1126 /* Ack. the request */ 1127 outb(lpt_data_port, 0x01); 1128 1129 /* Get the packet length */ 1130 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1131 if (j == -1) 1132 goto err; 1133 len = j; 1134 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1135 if (j == -1) 1136 goto err; 1137 len = len + (j << 8); 1138 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 1139 goto err; 1140 1141 bp = sc->sc_ifbuf; 1142 1143 while (len--) { 1144 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1145 if (j == -1) { 1146 goto err; 1147 } 1148 *bp++ = j; 1149 } 1150 /* Get and ignore checksum */ 1151 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1152 if (j == -1) { 1153 goto err; 1154 } 1155 1156 len = bp - sc->sc_ifbuf; 1157 if (len <= CLPIPHDRLEN) 1158 goto err; 1159 1160 sc->sc_iferrs = 0; 1161 1162 if (IF_QFULL(&ipintrq)) { 1163 lprintf(("DROP")); 1164 IF_DROP(&ipintrq); 1165 goto done; 1166 } 1167 len -= CLPIPHDRLEN; 1168 sc->sc_if.if_ipackets++; 1169 sc->sc_if.if_ibytes += len; 1170 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 1171 if (top) { 1172 IF_ENQUEUE(&ipintrq, top); 1173 schednetisr(NETISR_IP); 1174 } 1175 goto done; 1176 } 1177 while ((inb(lpt_stat_port) & LPIP_SHAKE)) { 1178 len = sc->sc_if.if_mtu + LPIPHDRLEN; 1179 bp = sc->sc_ifbuf; 1180 while (len--) { 1181 1182 cl = inb(lpt_stat_port); 1183 outb(lpt_data_port, 8); 1184 1185 j = LPMAXSPIN2; 1186 while((inb(lpt_stat_port) & LPIP_SHAKE)) 1187 if(!--j) goto err; 1188 1189 c = inb(lpt_stat_port); 1190 outb(lpt_data_port, 0); 1191 1192 *bp++= trecvh[cl] | trecvl[c]; 1193 1194 j = LPMAXSPIN2; 1195 while (!((cl=inb(lpt_stat_port)) & LPIP_SHAKE)) { 1196 if (cl != c && 1197 (((cl = inb(lpt_stat_port)) ^ 0xb8) & 0xf8) == 1198 (c & 0xf8)) 1199 goto end; 1200 if (!--j) goto err; 1201 } 1202 } 1203 1204 end: 1205 len = bp - sc->sc_ifbuf; 1206 if (len <= LPIPHDRLEN) 1207 goto err; 1208 1209 sc->sc_iferrs = 0; 1210 1211 if (IF_QFULL(&ipintrq)) { 1212 lprintf(("DROP")); 1213 IF_DROP(&ipintrq); 1214 goto done; 1215 } 1216 if (sc->sc_if.if_bpf) { 1217 bpf_tap(&sc->sc_if, sc->sc_ifbuf, len); 1218 } 1219 len -= LPIPHDRLEN; 1220 sc->sc_if.if_ipackets++; 1221 sc->sc_if.if_ibytes += len; 1222 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 1223 if (top) { 1224 IF_ENQUEUE(&ipintrq, top); 1225 schednetisr(NETISR_IP); 1226 } 1227 } 1228 goto done; 1229 1230 err: 1231 outb(lpt_data_port, 0); 1232 lprintf(("R")); 1233 sc->sc_if.if_ierrors++; 1234 sc->sc_iferrs++; 1235 1236 /* 1237 * We are not able to send receive anything for now, 1238 * so stop wasting our time 1239 */ 1240 if (sc->sc_iferrs > LPMAXERRS) { 1241 printf("lp%d: Too many errors, Going off-line.\n", unit); 1242 outb(lpt_ctrl_port, 0x00); 1243 sc->sc_if.if_flags &= ~IFF_RUNNING; 1244 sc->sc_iferrs=0; 1245 } 1246 1247 done: 1248 splx(s); 1249 return; 1250} 1251 1252static __inline int 1253lpoutbyte (u_char byte, int spin, int data_port, int status_port) 1254{ 1255 outb(data_port, txmith[byte]); 1256 while (!(inb(status_port) & LPIP_SHAKE)) 1257 if (--spin == 0) 1258 return 1; 1259 outb(data_port, txmitl[byte]); 1260 while (inb(status_port) & LPIP_SHAKE) 1261 if (--spin == 0) 1262 return 1; 1263 return 0; 1264} 1265 1266static int 1267lpoutput (struct ifnet *ifp, struct mbuf *m, 1268 struct sockaddr *dst, struct rtentry *rt) 1269{ 1270 register int lpt_data_port = lpt_sc[ifp->if_unit].sc_port + lpt_data; 1271 register int lpt_stat_port = lpt_sc[ifp->if_unit].sc_port + lpt_status; 1272#ifndef PC98 1273 int lpt_ctrl_port = lpt_sc[ifp->if_unit].sc_port + lpt_control; 1274#endif 1275 1276 int s, err; 1277 struct mbuf *mm; 1278 u_char *cp = "\0\0"; 1279 u_char chksum = 0; 1280 int count = 0; 1281 int i; 1282 int spin; 1283 1284 /* We need a sensible value if we abort */ 1285 cp++; 1286 ifp->if_flags |= IFF_RUNNING; 1287 1288 err = 1; /* assume we're aborting because of an error */ 1289 1290 s = splhigh(); 1291 1292#ifndef PC98 1293 /* Suspend (on laptops) or receive-errors might have taken us offline */ 1294 outb(lpt_ctrl_port, LPC_ENA); 1295#endif 1296 1297 if (ifp->if_flags & IFF_LINK0) { 1298 1299 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1300 lprintf(("&")); 1301 lptintr(ifp->if_unit); 1302 } 1303 1304 /* Alert other end to pending packet */ 1305 spin = LPMAXSPIN1; 1306 outb(lpt_data_port, 0x08); 1307 while ((inb(lpt_stat_port) & 0x08) == 0) 1308 if (--spin == 0) { 1309 goto nend; 1310 } 1311 1312 /* Calculate length of packet, then send that */ 1313 1314 count += 14; /* Ethernet header len */ 1315 1316 mm = m; 1317 for (mm = m; mm; mm = mm->m_next) { 1318 count += mm->m_len; 1319 } 1320 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1321 goto nend; 1322 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1323 goto nend; 1324 1325 /* Send dummy ethernet header */ 1326 for (i = 0; i < 12; i++) { 1327 if (clpoutbyte(i, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1328 goto nend; 1329 chksum += i; 1330 } 1331 1332 if (clpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1333 goto nend; 1334 if (clpoutbyte(0x00, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1335 goto nend; 1336 chksum += 0x08 + 0x00; /* Add into checksum */ 1337 1338 mm = m; 1339 do { 1340 cp = mtod(mm, u_char *); 1341 while (mm->m_len--) { 1342 chksum += *cp; 1343 if (clpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1344 goto nend; 1345 } 1346 } while ((mm = mm->m_next)); 1347 1348 /* Send checksum */ 1349 if (clpoutbyte(chksum, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1350 goto nend; 1351 1352 /* Go quiescent */ 1353 outb(lpt_data_port, 0); 1354 1355 err = 0; /* No errors */ 1356 1357 nend: 1358 if (err) { /* if we didn't timeout... */ 1359 ifp->if_oerrors++; 1360 lprintf(("X")); 1361 } else { 1362 ifp->if_opackets++; 1363 ifp->if_obytes += m->m_pkthdr.len; 1364 } 1365 1366 m_freem(m); 1367 1368 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1369 lprintf(("^")); 1370 lptintr(ifp->if_unit); 1371 } 1372 (void) splx(s); 1373 return 0; 1374 } 1375 1376 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1377 lprintf(("&")); 1378 lptintr(ifp->if_unit); 1379 } 1380 1381 if (lpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1382 goto end; 1383 if (lpoutbyte(0x00, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1384 goto end; 1385 1386 mm = m; 1387 do { 1388 cp = mtod(mm,u_char *); 1389 while (mm->m_len--) 1390 if (lpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1391 goto end; 1392 } while ((mm = mm->m_next)); 1393 1394 err = 0; /* no errors were encountered */ 1395 1396 end: 1397 --cp; 1398 outb(lpt_data_port, txmitl[*cp] ^ 0x17); 1399 1400 if (err) { /* if we didn't timeout... */ 1401 ifp->if_oerrors++; 1402 lprintf(("X")); 1403 } else { 1404 ifp->if_opackets++; 1405 ifp->if_obytes += m->m_pkthdr.len; 1406 if (ifp->if_bpf) { 1407 /* 1408 * We need to prepend the packet type as 1409 * a two byte field. Cons up a dummy header 1410 * to pacify bpf. This is safe because bpf 1411 * will only read from the mbuf (i.e., it won't 1412 * try to free it or keep a pointer to it). 1413 */ 1414 struct mbuf m0; 1415 u_short hdr = 0x800; 1416 1417 m0.m_next = m; 1418 m0.m_len = 2; 1419 m0.m_data = (char *)&hdr; 1420 1421 bpf_mtap(ifp, &m0); 1422 } 1423 } 1424 1425 m_freem(m); 1426 1427 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1428 lprintf(("^")); 1429 lptintr(ifp->if_unit); 1430 } 1431 1432 (void) splx(s); 1433 return 0; 1434} 1435 1436#endif /* INET */ 1437 1438static int lpt_devsw_installed; 1439 1440static void lpt_drvinit(void *unused) 1441{ 1442 1443 if( ! lpt_devsw_installed ) { 1444 cdevsw_add(&lpt_cdevsw); 1445 lpt_devsw_installed = 1; 1446 } 1447} 1448 1449SYSINIT(lptdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,lpt_drvinit,NULL) 1450 1451