olpt.c revision 60041
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 60041 2000-05-05 09:59:14Z 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#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/kernel.h> 117#include <sys/uio.h> 118#include <sys/syslog.h> 119#include <machine/clock.h> 120#include <machine/lpt.h> 121 122#include <i386/isa/isa_device.h> 123#include <i386/isa/lptreg.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 */ 138 139 140#define LPINITRDY 4 /* wait up to 4 seconds for a ready */ 141#define LPTOUTINITIAL 10 /* initial timeout to wait for ready 1/10 s */ 142#define LPTOUTMAX 1 /* maximal timeout 1 s */ 143#define LPPRI (PZERO+8) 144#define BUFSIZE 1024 145 146#ifdef INET 147#ifndef LPMTU /* MTU for the lp# interfaces */ 148#define LPMTU 1500 149#endif 150 151#ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 152#define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 153#endif 154 155#ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 156#define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 157#endif 158 159#ifndef LPMAXERRS /* Max errors before !RUNNING */ 160#define LPMAXERRS 100 161#endif 162 163#define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 164#define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 165#define MLPIPHDRLEN CLPIPHDRLEN 166 167#define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 168#define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 169#if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 170#define MLPIPHDRLEN LPIPHDRLEN 171#endif 172 173#define LPIPTBLSIZE 256 /* Size of octet translation table */ 174 175#endif /* INET */ 176 177#ifndef PC98 178/* BIOS printer list - used by BIOS probe*/ 179#define BIOS_LPT_PORTS 0x408 180#define BIOS_PORTS (short *)(KERNBASE+BIOS_LPT_PORTS) 181#define BIOS_MAX_LPT 4 182#endif 183 184 185#ifndef DEBUG 186#define lprintf(args) 187#else 188#define lprintf(args) do { \ 189 if (lptflag) \ 190 printf args; \ 191 } while (0) 192static int volatile lptflag = 1; 193#endif 194 195#define LPTUNIT(s) ((s)&0x03) 196#define LPTFLAGS(s) ((s)&0xfc) 197 198static struct lpt_softc { 199 int sc_port; 200 short sc_state; 201 /* default case: negative prime, negative ack, handshake strobe, 202 prime once */ 203 u_char sc_control; 204 char sc_flags; 205#define LP_POS_INIT 0x04 /* if we are a postive init signal */ 206#define LP_POS_ACK 0x08 /* if we are a positive going ack */ 207#define LP_NO_PRIME 0x10 /* don't prime the printer at all */ 208#define LP_PRIMEOPEN 0x20 /* prime on every open */ 209#define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */ 210#define LP_BYPASS 0x80 /* bypass printer ready checks */ 211 struct buf *sc_inbuf; 212 short sc_xfercnt ; 213 char sc_primed; 214 char *sc_cp ; 215 u_char sc_irq ; /* IRQ status of port */ 216#define LP_HAS_IRQ 0x01 /* we have an irq available */ 217#define LP_USE_IRQ 0x02 /* we are using our irq */ 218#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */ 219 u_char sc_backoff ; /* time to call lptout() again */ 220 221#ifdef INET 222 struct ifnet sc_if; 223 u_char *sc_ifbuf; 224 int sc_iferrs; 225#endif 226} lpt_sc[NOLPT] ; 227 228/* bits for state */ 229#define OPEN (1<<0) /* device is open */ 230#define ASLP (1<<1) /* awaiting draining of printer */ 231#define ERROR (1<<2) /* error was received from printer */ 232#define OBUSY (1<<3) /* printer is busy doing output */ 233#define LPTOUT (1<<4) /* timeout while not selected */ 234#define TOUT (1<<5) /* timeout while not selected */ 235#define INIT (1<<6) /* waiting to initialize for open */ 236#define INTERRUPTED (1<<7) /* write call was interrupted */ 237 238 239/* status masks to interrogate printer status */ 240#define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */ 241#define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR) 242 243/* Printer Ready condition - from lpa.c */ 244/* Only used in polling code */ 245#ifdef PC98 246#define NOT_READY(x) ((inb(x) & LPS_NBSY) != LPS_NBSY) 247#else /* IBM-PC */ 248#define LPS_INVERT (LPS_NBSY | LPS_NACK | LPS_SEL | LPS_NERR) 249#define LPS_MASK (LPS_NBSY | LPS_NACK | LPS_OUT | LPS_SEL | LPS_NERR) 250#define NOT_READY(x) ((inb(x)^LPS_INVERT)&LPS_MASK) 251#endif 252 253#define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */ 254#define MAX_SPIN 20 /* Max delay for device ready in usecs */ 255 256static timeout_t lptout; 257static int lptprobe (struct isa_device *dvp); 258static int lptattach (struct isa_device *isdp); 259static ointhand2_t lptintr; 260static void lpt_drvinit(void *unused); 261 262#ifdef INET 263 264/* Tables for the lp# interface */ 265static u_char *txmith; 266#define txmitl (txmith+(1*LPIPTBLSIZE)) 267#define trecvh (txmith+(2*LPIPTBLSIZE)) 268#define trecvl (txmith+(3*LPIPTBLSIZE)) 269 270static u_char *ctxmith; 271#define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 272#define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 273#define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 274 275/* Functions for the lp# interface */ 276static void lpattach(struct lpt_softc *,int); 277#ifndef PC98 278static int lpinittables(void); 279#endif 280static int lpioctl(struct ifnet *, u_long, caddr_t); 281static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 282 struct rtentry *); 283static void lpintr(int); 284#endif /* INET */ 285 286struct isa_driver olptdriver = { 287 lptprobe, lptattach, "olpt" 288}; 289 290static d_open_t lptopen; 291static d_close_t lptclose; 292static d_write_t lptwrite; 293static d_ioctl_t lptioctl; 294 295#define CDEV_MAJOR 16 296static struct cdevsw lpt_cdevsw = { 297 /* open */ lptopen, 298 /* close */ lptclose, 299 /* read */ noread, 300 /* write */ lptwrite, 301 /* ioctl */ lptioctl, 302 /* poll */ nopoll, 303 /* mmap */ nommap, 304 /* strategy */ nostrategy, 305 /* name */ "lpt", 306 /* maj */ CDEV_MAJOR, 307 /* dump */ nodump, 308 /* psize */ nopsize, 309 /* flags */ 0, 310 /* bmaj */ -1 311}; 312 313#ifndef PC98 314/* 315 * Internal routine to lptprobe to do port tests of one byte value 316 */ 317static int 318lpt_port_test (int port, u_char data, u_char mask) 319{ 320 int temp, timeout; 321 322 data = data & mask; 323 outb(port, data); 324 timeout = 10000; 325 do { 326 DELAY(10); 327 temp = inb(port) & mask; 328 } 329 while (temp != data && --timeout); 330 lprintf(("Port 0x%x\tout=%x\tin=%x\ttout=%d\n", 331 port, data, temp, timeout)); 332 return (temp == data); 333} 334#endif /* PC98 */ 335 336/* 337 * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94 338 * Based partially on Rod Grimes' printer probe 339 * 340 * Logic: 341 * 1) If no port address was given, use the bios detected ports 342 * and autodetect what ports the printers are on. 343 * 2) Otherwise, probe the data port at the address given, 344 * using the method in Rod Grimes' port probe. 345 * (Much code ripped off directly from Rod's probe.) 346 * 347 * Comments from Rod's probe: 348 * Logic: 349 * 1) You should be able to write to and read back the same value 350 * to the data port. Do an alternating zeros, alternating ones, 351 * walking zero, and walking one test to check for stuck bits. 352 * 353 * 2) You should be able to write to and read back the same value 354 * to the control port lower 5 bits, the upper 3 bits are reserved 355 * per the IBM PC technical reference manauls and different boards 356 * do different things with them. Do an alternating zeros, alternating 357 * ones, walking zero, and walking one test to check for stuck bits. 358 * 359 * Some printers drag the strobe line down when the are powered off 360 * so this bit has been masked out of the control port test. 361 * 362 * XXX Some printers may not like a fast pulse on init or strobe, I 363 * don't know at this point, if that becomes a problem these bits 364 * should be turned off in the mask byte for the control port test. 365 * 366 * We are finally left with a mask of 0x14, due to some printers 367 * being adamant about holding other bits high ........ 368 * 369 * Before probing the control port, we write a 0 to the data port - 370 * If not, some printers chuck out garbage when the strobe line 371 * gets toggled. 372 * 373 * 3) Set the data and control ports to a value of 0 374 * 375 * This probe routine has been tested on Epson Lx-800, HP LJ3P, 376 * Epson FX-1170 and C.Itoh 8510RM 377 * printers. 378 * Quick exit on fail added. 379 */ 380 381int 382lptprobe(struct isa_device *dvp) 383{ 384#ifdef PC98 385#define PC98_OLD_LPT 0x40 386#define PC98_IEEE_1284_FUNCTION 0x149 387 unsigned int pc98_ieee_mode, tmp; 388 389 if (dvp->id_iobase == PC98_OLD_LPT) { 390 tmp = inb(PC98_IEEE_1284_FUNCTION); 391 pc98_ieee_mode = tmp; 392 if ((tmp & 0x10) == 0x10) { 393 outb(PC98_IEEE_1284_FUNCTION, tmp & ~0x10); 394 tmp = inb(PC98_IEEE_1284_FUNCTION); 395 if ((tmp & 0x10) != 0x10) { 396 outb(PC98_IEEE_1284_FUNCTION, pc98_ieee_mode); 397 return 0; 398 } 399 } 400 } 401 return 8; 402#else 403 int port; 404 static short next_bios_lpt = 0; 405 int status; 406 static u_char testbyte[18] = { 407 0x55, /* alternating zeros */ 408 0xaa, /* alternating ones */ 409 0xfe, 0xfd, 0xfb, 0xf7, 410 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */ 411 0x01, 0x02, 0x04, 0x08, 412 0x10, 0x20, 0x40, 0x80 /* walking one */ 413 }; 414 int i; 415 416 /* 417 * Make sure there is some way for lptopen to see that 418 * the port is not configured 419 * This 0 will remain if the port isn't attached 420 */ 421 (lpt_sc + dvp->id_unit)->sc_port = 0; 422 423 status = IO_LPTSIZE; 424 /* If port not specified, use bios list */ 425 if(dvp->id_iobase < 0) { /* port? */ 426 if((next_bios_lpt < BIOS_MAX_LPT) && 427 (*(BIOS_PORTS+next_bios_lpt) != 0) ) { 428 dvp->id_iobase = *(BIOS_PORTS+next_bios_lpt++); 429 goto end_probe; 430 } else 431 return (0); 432 } 433 434 /* Port was explicitly specified */ 435 /* This allows probing of ports unknown to the BIOS */ 436 port = dvp->id_iobase + lpt_data; 437 for (i = 0; i < 18; i++) { 438 if (!lpt_port_test(port, testbyte[i], 0xff)) { 439 status = 0; 440 goto end_probe; 441 } 442 } 443 444end_probe: 445 /* write 0's to control and data ports */ 446 outb(dvp->id_iobase+lpt_data, 0); 447 outb(dvp->id_iobase+lpt_control, 0); 448 449 return (status); 450#endif 451} 452 453/* XXX Todo - try and detect if interrupt is working */ 454int 455lptattach(struct isa_device *isdp) 456{ 457 struct lpt_softc *sc; 458 int unit; 459 460 isdp->id_ointr = lptintr; 461 unit = isdp->id_unit; 462 sc = lpt_sc + unit; 463 sc->sc_port = isdp->id_iobase; 464 sc->sc_primed = 0; /* not primed yet */ 465#ifdef PC98 466 outb(sc->sc_port+lpt_pstb_ctrl, LPC_DIS_PSTB); /* PSTB disable */ 467 outb(sc->sc_port+lpt_control, LPC_MODE8255); /* 8255 mode set */ 468 outb(sc->sc_port+lpt_control, LPC_NIRQ8); /* IRQ8 inactive */ 469 outb(sc->sc_port+lpt_control, LPC_NPSTB); /* PSTB inactive */ 470 outb(sc->sc_port+lpt_pstb_ctrl, LPC_EN_PSTB); /* PSTB enable */ 471#else 472 outb(sc->sc_port+lpt_control, LPC_NINIT); 473#endif 474 475 /* check if we can use interrupt */ 476 lprintf(("oldirq %x\n", sc->sc_irq)); 477 if (isdp->id_irq) { 478 sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ; 479 printf("lpt%d: Interrupt-driven port\n", unit); 480#ifdef INET 481 lpattach(sc, unit); 482#endif 483 } else { 484 sc->sc_irq = 0; 485 lprintf(("lpt%d: Polled port\n", unit)); 486 } 487 lprintf(("irq %x\n", sc->sc_irq)); 488 489 /* XXX what to do about the flags in the minor number? */ 490 make_dev(&lpt_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit); 491 make_dev(&lpt_cdevsw, unit | LP_BYPASS, 492 UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit); 493 494#ifdef LPT_DRVINIT_AT_ATTACH 495 lpt_drvinit(NULL); 496#endif 497 return (1); 498} 499 500/* 501 * lptopen -- reset the printer, then wait until it's selected and not busy. 502 * If LP_BYPASS flag is selected, then we do not try to select the 503 * printer -- this is just used for passing ioctls. 504 */ 505 506static int 507lptopen (dev_t dev, int flags, int fmt, struct proc *p) 508{ 509 struct lpt_softc *sc; 510 int s; 511#ifdef PC98 512 int port; 513#else 514 int trys, port; 515#endif 516 u_int unit = LPTUNIT(minor(dev)); 517 518 sc = lpt_sc + unit; 519 if ((unit >= NOLPT) || (sc->sc_port == 0)) 520 return (ENXIO); 521 522#ifdef INET 523 if (sc->sc_if.if_flags & IFF_UP) 524 return(EBUSY); 525#endif 526 527 if (sc->sc_state) { 528 lprintf(("lp: still open %x\n", sc->sc_state)); 529 return(EBUSY); 530 } else 531 sc->sc_state |= INIT; 532 533 sc->sc_flags = LPTFLAGS(minor(dev)); 534 535 /* Check for open with BYPASS flag set. */ 536 if (sc->sc_flags & LP_BYPASS) { 537 sc->sc_state = OPEN; 538 return(0); 539 } 540 541 s = spltty(); 542 lprintf(("lp flags 0x%x\n", sc->sc_flags)); 543 port = sc->sc_port; 544 545 /* set IRQ status according to ENABLE_IRQ flag */ 546 if (sc->sc_irq & LP_ENABLE_IRQ) 547 sc->sc_irq |= LP_USE_IRQ; 548 else 549 sc->sc_irq &= ~LP_USE_IRQ; 550 551 /* init printer */ 552#ifndef PC98 553 if ((sc->sc_flags & LP_NO_PRIME) == 0) { 554 if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) { 555 outb(port+lpt_control, 0); 556 sc->sc_primed++; 557 DELAY(500); 558 } 559 } 560 561 outb (port+lpt_control, LPC_SEL|LPC_NINIT); 562 563 /* wait till ready (printer running diagnostics) */ 564 trys = 0; 565 do { 566 /* ran out of waiting for the printer */ 567 if (trys++ >= LPINITRDY*4) { 568 splx(s); 569 sc->sc_state = 0; 570 lprintf(("status %x\n", inb(port+lpt_status))); 571 return (EBUSY); 572 } 573 574 /* wait 1/4 second, give up if we get a signal */ 575 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, "lptinit", hz/4) != 576 EWOULDBLOCK) { 577 sc->sc_state = 0; 578 splx(s); 579 return (EBUSY); 580 } 581 582 /* is printer online and ready for output */ 583 } while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 584 (LPS_SEL|LPS_NBSY|LPS_NERR)); 585 586 sc->sc_control = LPC_SEL|LPC_NINIT; 587 if (sc->sc_flags & LP_AUTOLF) 588 sc->sc_control |= LPC_AUTOL; 589 590 /* enable interrupt if interrupt-driven */ 591 if (sc->sc_irq & LP_USE_IRQ) 592 sc->sc_control |= LPC_ENA; 593 594 outb(port+lpt_control, sc->sc_control); 595#endif 596 597 sc->sc_state = OPEN; 598 sc->sc_inbuf = geteblk(BUFSIZE); 599 sc->sc_xfercnt = 0; 600 splx(s); 601 602 /* only use timeout if using interrupt */ 603 lprintf(("irq %x\n", sc->sc_irq)); 604 if (sc->sc_irq & LP_USE_IRQ) { 605 sc->sc_state |= TOUT; 606 timeout (lptout, (caddr_t)sc, 607 (sc->sc_backoff = hz/LPTOUTINITIAL)); 608 } 609 610 lprintf(("opened.\n")); 611 return(0); 612} 613 614static void 615lptout (void *arg) 616{ 617 struct lpt_softc *sc = arg; 618 int pl; 619 620 lprintf(("T %x ", inb(sc->sc_port+lpt_status))); 621 if (sc->sc_state & OPEN) { 622 sc->sc_backoff++; 623 if (sc->sc_backoff > hz/LPTOUTMAX) 624 sc->sc_backoff = sc->sc_backoff > hz/LPTOUTMAX; 625 timeout (lptout, (caddr_t)sc, sc->sc_backoff); 626 } else 627 sc->sc_state &= ~TOUT; 628 629 if (sc->sc_state & ERROR) 630 sc->sc_state &= ~ERROR; 631 632 /* 633 * Avoid possible hangs do to missed interrupts 634 */ 635 if (sc->sc_xfercnt) { 636 pl = spltty(); 637 lptintr(sc - lpt_sc); 638 splx(pl); 639 } else { 640 sc->sc_state &= ~OBUSY; 641 wakeup((caddr_t)sc); 642 } 643} 644 645/* 646 * lptclose -- close the device, free the local line buffer. 647 * 648 * Check for interrupted write call added. 649 */ 650 651static int 652lptclose(dev_t dev, int flags, int fmt, struct proc *p) 653{ 654 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 655#ifndef PC98 656 int port = sc->sc_port; 657#endif 658 659 if(sc->sc_flags & LP_BYPASS) 660 goto end_close; 661 662 sc->sc_state &= ~OPEN; 663 664#ifndef PC98 665 /* if the last write was interrupted, don't complete it */ 666 if((!(sc->sc_state & INTERRUPTED)) && (sc->sc_irq & LP_USE_IRQ)) 667 while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 668 (LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt) 669 /* wait 1/4 second, give up if we get a signal */ 670 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, 671 "lpclose", hz) != EWOULDBLOCK) 672 break; 673 674 outb(sc->sc_port+lpt_control, LPC_NINIT); 675#endif 676 brelse(sc->sc_inbuf); 677 678end_close: 679 sc->sc_state = 0; 680 sc->sc_xfercnt = 0; 681 lprintf(("closed.\n")); 682 return(0); 683} 684 685/* 686 * pushbytes() 687 * Workhorse for actually spinning and writing bytes to printer 688 * Derived from lpa.c 689 * Originally by ? 690 * 691 * This code is only used when we are polling the port 692 */ 693static int 694pushbytes(struct lpt_softc * sc) 695{ 696 int spin, err, tic; 697 char ch; 698 int port = sc->sc_port; 699 700 lprintf(("p")); 701 /* loop for every character .. */ 702 while (sc->sc_xfercnt > 0) { 703 /* printer data */ 704 ch = *(sc->sc_cp); 705 sc->sc_cp++; 706 sc->sc_xfercnt--; 707 708 /* 709 * Wait for printer ready. 710 * Loop 20 usecs testing BUSY bit, then sleep 711 * for exponentially increasing timeout. (vak) 712 */ 713 for (spin=0; NOT_READY(port+lpt_status) && spin<MAX_SPIN; ++spin) 714 DELAY(1); /* XXX delay is NOT this accurate! */ 715 if (spin >= MAX_SPIN) { 716 tic = 0; 717 while (NOT_READY(port+lpt_status)) { 718 /* 719 * Now sleep, every cycle a 720 * little longer .. 721 */ 722 tic = tic + tic + 1; 723 /* 724 * But no more than 10 seconds. (vak) 725 */ 726 if (tic > MAX_SLEEP) 727 tic = MAX_SLEEP; 728 err = tsleep((caddr_t)sc, LPPRI, 729 "lptpoll", tic); 730 if (err != EWOULDBLOCK) { 731 return (err); 732 } 733 } 734 } 735 736 /* output data */ 737 outb(port+lpt_data, ch); 738#ifdef PC98 739 DELAY(1); 740 outb(port+lpt_control, LPC_PSTB); 741 DELAY(1); 742 outb(port+lpt_control, LPC_NPSTB); 743#else 744 /* strobe */ 745 outb(port+lpt_control, sc->sc_control|LPC_STB); 746 outb(port+lpt_control, sc->sc_control); 747#endif 748 749 } 750 return(0); 751} 752 753/* 754 * lptwrite --copy a line from user space to a local buffer, then call 755 * putc to get the chars moved to the output queue. 756 * 757 * Flagging of interrupted write added. 758 */ 759 760static int 761lptwrite(dev_t dev, struct uio * uio, int ioflag) 762{ 763 register unsigned n; 764 int pl, err; 765 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 766 767 if(sc->sc_flags & LP_BYPASS) { 768 /* we can't do writes in bypass mode */ 769 return(EPERM); 770 } 771 772 sc->sc_state &= ~INTERRUPTED; 773 while ((n = min(BUFSIZE, uio->uio_resid)) != 0) { 774 sc->sc_cp = sc->sc_inbuf->b_data ; 775 uiomove(sc->sc_cp, n, uio); 776 sc->sc_xfercnt = n ; 777 while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) { 778 lprintf(("i")); 779 /* if the printer is ready for a char, */ 780 /* give it one */ 781 if ((sc->sc_state & OBUSY) == 0){ 782 lprintf(("\nC %d. ", sc->sc_xfercnt)); 783 pl = spltty(); 784 lptintr(sc - lpt_sc); 785 (void) splx(pl); 786 } 787 lprintf(("W ")); 788 if (sc->sc_state & OBUSY) 789 if ((err = tsleep ((caddr_t)sc, 790 LPPRI|PCATCH, "lpwrite", 0))) { 791 sc->sc_state |= INTERRUPTED; 792 return(err); 793 } 794 } 795 /* check to see if we must do a polled write */ 796 if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) { 797 lprintf(("p")); 798 if((err = pushbytes(sc))) 799 return(err); 800 } 801 } 802 return(0); 803} 804 805/* 806 * lptintr -- handle printer interrupts which occur when the printer is 807 * ready to accept another char. 808 * 809 * do checking for interrupted write call. 810 */ 811 812static void 813lptintr(int unit) 814{ 815#if defined(INET) || !defined(PC98) 816 struct lpt_softc *sc = lpt_sc + unit; 817#endif 818#ifndef PC98 819 int port = sc->sc_port, sts; 820 int i; 821#endif 822 823#ifdef INET 824 if(sc->sc_if.if_flags & IFF_UP) { 825 lpintr(unit); 826 return; 827 } 828#endif /* INET */ 829 830#ifndef PC98 831 /* 832 * Is printer online and ready for output? 833 * 834 * Avoid falling back to lptout() too quickly. First spin-loop 835 * to see if the printer will become ready ``really soon now''. 836 */ 837 for (i = 0; 838 i < 100 && 839 ((sts=inb(port+lpt_status)) & RDY_MASK) != LP_READY; 840 i++) ; 841 if ((sts & RDY_MASK) == LP_READY) { 842 sc->sc_state = (sc->sc_state | OBUSY) & ~ERROR; 843 sc->sc_backoff = hz/LPTOUTINITIAL; 844 845 if (sc->sc_xfercnt) { 846 /* send char */ 847 /*lprintf(("%x ", *sc->sc_cp)); */ 848 outb(port+lpt_data, *sc->sc_cp++) ; 849 outb(port+lpt_control, sc->sc_control|LPC_STB); 850 /* DELAY(X) */ 851 outb(port+lpt_control, sc->sc_control); 852 853 /* any more data for printer */ 854 if(--(sc->sc_xfercnt) > 0) return; 855 } 856 857 /* 858 * No more data waiting for printer. 859 * Wakeup is not done if write call was interrupted. 860 */ 861 sc->sc_state &= ~OBUSY; 862 if(!(sc->sc_state & INTERRUPTED)) 863 wakeup((caddr_t)sc); 864 lprintf(("w ")); 865 return; 866 } else { /* check for error */ 867 if(((sts & (LPS_NERR | LPS_OUT) ) != LPS_NERR) && 868 (sc->sc_state & OPEN)) 869 sc->sc_state |= ERROR; 870 /* lptout() will jump in and try to restart. */ 871 } 872#endif 873 lprintf(("sts %x ", sts)); 874} 875 876static int 877lptioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p) 878{ 879 int error = 0; 880 struct lpt_softc *sc; 881 u_int unit = LPTUNIT(minor(dev)); 882 u_char old_sc_irq; /* old printer IRQ status */ 883 884 sc = lpt_sc + unit; 885 886 switch (cmd) { 887 case LPT_IRQ : 888 if(sc->sc_irq & LP_HAS_IRQ) { 889 /* 890 * NOTE: 891 * If the IRQ status is changed, 892 * this will only be visible on the 893 * next open. 894 * 895 * If interrupt status changes, 896 * this gets syslog'd. 897 */ 898 old_sc_irq = sc->sc_irq; 899 if(*(int*)data == 0) 900 sc->sc_irq &= (~LP_ENABLE_IRQ); 901 else 902 sc->sc_irq |= LP_ENABLE_IRQ; 903 if (old_sc_irq != sc->sc_irq ) 904 log(LOG_NOTICE, "lpt%c switched to %s mode\n", 905 (char)unit+'0', 906 (sc->sc_irq & LP_ENABLE_IRQ)? 907 "interrupt-driven":"polled"); 908 } else /* polled port */ 909 error = EOPNOTSUPP; 910 break; 911 default: 912 error = ENODEV; 913 } 914 915 return(error); 916} 917 918#ifdef INET 919 920static void 921lpattach (struct lpt_softc *sc, int unit) 922{ 923 struct ifnet *ifp = &sc->sc_if; 924 925 ifp->if_softc = sc; 926 ifp->if_name = "lp"; 927 ifp->if_unit = unit; 928 ifp->if_mtu = LPMTU; 929 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 930 ifp->if_ioctl = lpioctl; 931 ifp->if_output = lpoutput; 932 ifp->if_type = IFT_PARA; 933 ifp->if_hdrlen = 0; 934 ifp->if_addrlen = 0; 935 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 936 if_attach(ifp); 937 printf("lp%d: TCP/IP capable interface\n", unit); 938 939 bpfattach(ifp, DLT_NULL, LPIPHDRLEN); 940} 941 942#ifndef PC98 943/* 944 * Build the translation tables for the LPIP (BSD unix) protocol. 945 * We don't want to calculate these nasties in our tight loop, so we 946 * precalculate them when we initialize. 947 */ 948static int 949lpinittables (void) 950{ 951 int i; 952 953 if (!txmith) 954 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 955 956 if (!txmith) 957 return 1; 958 959 if (!ctxmith) 960 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 961 962 if (!ctxmith) 963 return 1; 964 965 for (i=0; i < LPIPTBLSIZE; i++) { 966 ctxmith[i] = (i & 0xF0) >> 4; 967 ctxmitl[i] = 0x10 | (i & 0x0F); 968 ctrecvh[i] = (i & 0x78) << 1; 969 ctrecvl[i] = (i & 0x78) >> 3; 970 } 971 972 for (i=0; i < LPIPTBLSIZE; i++) { 973 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 974 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 975 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 976 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 977 } 978 979 return 0; 980} 981#endif /* PC98 */ 982 983/* 984 * Process an ioctl request. 985 */ 986 987static int 988lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 989{ 990 struct lpt_softc *sc = lpt_sc + ifp->if_unit; 991 struct ifaddr *ifa = (struct ifaddr *)data; 992 struct ifreq *ifr = (struct ifreq *)data; 993 u_char *ptr; 994 995 switch (cmd) { 996 997 case SIOCSIFDSTADDR: 998 case SIOCAIFADDR: 999 case SIOCSIFADDR: 1000 if (ifa->ifa_addr->sa_family != AF_INET) 1001 return EAFNOSUPPORT; 1002 ifp->if_flags |= IFF_UP; 1003 /* FALLTHROUGH */ 1004 case SIOCSIFFLAGS: 1005 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 1006 outb(sc->sc_port + lpt_control, 0x00); 1007 ifp->if_flags &= ~IFF_RUNNING; 1008 break; 1009 } 1010#ifdef PC98 1011 /* XXX */ 1012 return ENOBUFS; 1013#else 1014 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 1015 if (lpinittables()) 1016 return ENOBUFS; 1017 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 1018 M_DEVBUF, M_WAITOK); 1019 if (!sc->sc_ifbuf) 1020 return ENOBUFS; 1021 1022 outb(sc->sc_port + lpt_control, LPC_ENA); 1023 ifp->if_flags |= IFF_RUNNING; 1024 } 1025 break; 1026#endif 1027 case SIOCSIFMTU: 1028 ptr = sc->sc_ifbuf; 1029 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 1030 if (!sc->sc_ifbuf) { 1031 sc->sc_ifbuf = ptr; 1032 return ENOBUFS; 1033 } 1034 if (ptr) 1035 free(ptr,M_DEVBUF); 1036 sc->sc_if.if_mtu = ifr->ifr_mtu; 1037 break; 1038 1039 case SIOCGIFMTU: 1040 ifr->ifr_mtu = sc->sc_if.if_mtu; 1041 break; 1042 1043 case SIOCADDMULTI: 1044 case SIOCDELMULTI: 1045 if (ifr == 0) { 1046 return EAFNOSUPPORT; /* XXX */ 1047 } 1048 switch (ifr->ifr_addr.sa_family) { 1049 1050#ifdef INET 1051 case AF_INET: 1052 break; 1053#endif 1054 1055 default: 1056 return EAFNOSUPPORT; 1057 } 1058 break; 1059 1060 default: 1061 lprintf(("LP:ioctl(0x%lx)\n", cmd)); 1062 return EINVAL; 1063 } 1064 return 0; 1065} 1066 1067static __inline int 1068clpoutbyte (u_char byte, int spin, int data_port, int status_port) 1069{ 1070 outb(data_port, ctxmitl[byte]); 1071 while (inb(status_port) & CLPIP_SHAKE) 1072 if (--spin == 0) { 1073 return 1; 1074 } 1075 outb(data_port, ctxmith[byte]); 1076 while (!(inb(status_port) & CLPIP_SHAKE)) 1077 if (--spin == 0) { 1078 return 1; 1079 } 1080 return 0; 1081} 1082 1083static __inline int 1084clpinbyte (int spin, int data_port, int status_port) 1085{ 1086 int c, cl; 1087 1088 while((inb(status_port) & CLPIP_SHAKE)) 1089 if(!--spin) { 1090 return -1; 1091 } 1092 cl = inb(status_port); 1093 outb(data_port, 0x10); 1094 1095 while(!(inb(status_port) & CLPIP_SHAKE)) 1096 if(!--spin) { 1097 return -1; 1098 } 1099 c = inb(status_port); 1100 outb(data_port, 0x00); 1101 1102 return (ctrecvl[cl] | ctrecvh[c]); 1103} 1104 1105static void 1106lpintr (int unit) 1107{ 1108 struct lpt_softc *sc = lpt_sc + unit; 1109 register int lpt_data_port = sc->sc_port + lpt_data; 1110 register int lpt_stat_port = sc->sc_port + lpt_status; 1111 int lpt_ctrl_port = sc->sc_port + lpt_control; 1112 int len, s, j; 1113 u_char *bp; 1114 u_char c, cl; 1115 struct mbuf *top; 1116 1117 s = splhigh(); 1118 1119 if (sc->sc_if.if_flags & IFF_LINK0) { 1120 1121 /* Ack. the request */ 1122 outb(lpt_data_port, 0x01); 1123 1124 /* Get the packet length */ 1125 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1126 if (j == -1) 1127 goto err; 1128 len = j; 1129 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1130 if (j == -1) 1131 goto err; 1132 len = len + (j << 8); 1133 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 1134 goto err; 1135 1136 bp = sc->sc_ifbuf; 1137 1138 while (len--) { 1139 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1140 if (j == -1) { 1141 goto err; 1142 } 1143 *bp++ = j; 1144 } 1145 /* Get and ignore checksum */ 1146 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1147 if (j == -1) { 1148 goto err; 1149 } 1150 1151 len = bp - sc->sc_ifbuf; 1152 if (len <= CLPIPHDRLEN) 1153 goto err; 1154 1155 sc->sc_iferrs = 0; 1156 1157 if (IF_QFULL(&ipintrq)) { 1158 lprintf(("DROP")); 1159 IF_DROP(&ipintrq); 1160 goto done; 1161 } 1162 len -= CLPIPHDRLEN; 1163 sc->sc_if.if_ipackets++; 1164 sc->sc_if.if_ibytes += len; 1165 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 1166 if (top) { 1167 IF_ENQUEUE(&ipintrq, top); 1168 schednetisr(NETISR_IP); 1169 } 1170 goto done; 1171 } 1172 while ((inb(lpt_stat_port) & LPIP_SHAKE)) { 1173 len = sc->sc_if.if_mtu + LPIPHDRLEN; 1174 bp = sc->sc_ifbuf; 1175 while (len--) { 1176 1177 cl = inb(lpt_stat_port); 1178 outb(lpt_data_port, 8); 1179 1180 j = LPMAXSPIN2; 1181 while((inb(lpt_stat_port) & LPIP_SHAKE)) 1182 if(!--j) goto err; 1183 1184 c = inb(lpt_stat_port); 1185 outb(lpt_data_port, 0); 1186 1187 *bp++= trecvh[cl] | trecvl[c]; 1188 1189 j = LPMAXSPIN2; 1190 while (!((cl=inb(lpt_stat_port)) & LPIP_SHAKE)) { 1191 if (cl != c && 1192 (((cl = inb(lpt_stat_port)) ^ 0xb8) & 0xf8) == 1193 (c & 0xf8)) 1194 goto end; 1195 if (!--j) goto err; 1196 } 1197 } 1198 1199 end: 1200 len = bp - sc->sc_ifbuf; 1201 if (len <= LPIPHDRLEN) 1202 goto err; 1203 1204 sc->sc_iferrs = 0; 1205 1206 if (IF_QFULL(&ipintrq)) { 1207 lprintf(("DROP")); 1208 IF_DROP(&ipintrq); 1209 goto done; 1210 } 1211 if (sc->sc_if.if_bpf) { 1212 bpf_tap(&sc->sc_if, sc->sc_ifbuf, len); 1213 } 1214 len -= LPIPHDRLEN; 1215 sc->sc_if.if_ipackets++; 1216 sc->sc_if.if_ibytes += len; 1217 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 1218 if (top) { 1219 IF_ENQUEUE(&ipintrq, top); 1220 schednetisr(NETISR_IP); 1221 } 1222 } 1223 goto done; 1224 1225 err: 1226 outb(lpt_data_port, 0); 1227 lprintf(("R")); 1228 sc->sc_if.if_ierrors++; 1229 sc->sc_iferrs++; 1230 1231 /* 1232 * We are not able to send receive anything for now, 1233 * so stop wasting our time 1234 */ 1235 if (sc->sc_iferrs > LPMAXERRS) { 1236 printf("lp%d: Too many errors, Going off-line.\n", unit); 1237 outb(lpt_ctrl_port, 0x00); 1238 sc->sc_if.if_flags &= ~IFF_RUNNING; 1239 sc->sc_iferrs=0; 1240 } 1241 1242 done: 1243 splx(s); 1244 return; 1245} 1246 1247static __inline int 1248lpoutbyte (u_char byte, int spin, int data_port, int status_port) 1249{ 1250 outb(data_port, txmith[byte]); 1251 while (!(inb(status_port) & LPIP_SHAKE)) 1252 if (--spin == 0) 1253 return 1; 1254 outb(data_port, txmitl[byte]); 1255 while (inb(status_port) & LPIP_SHAKE) 1256 if (--spin == 0) 1257 return 1; 1258 return 0; 1259} 1260 1261static int 1262lpoutput (struct ifnet *ifp, struct mbuf *m, 1263 struct sockaddr *dst, struct rtentry *rt) 1264{ 1265 register int lpt_data_port = lpt_sc[ifp->if_unit].sc_port + lpt_data; 1266 register int lpt_stat_port = lpt_sc[ifp->if_unit].sc_port + lpt_status; 1267#ifndef PC98 1268 int lpt_ctrl_port = lpt_sc[ifp->if_unit].sc_port + lpt_control; 1269#endif 1270 1271 int s, err; 1272 struct mbuf *mm; 1273 u_char *cp = "\0\0"; 1274 u_char chksum = 0; 1275 int count = 0; 1276 int i; 1277 int spin; 1278 1279 /* We need a sensible value if we abort */ 1280 cp++; 1281 ifp->if_flags |= IFF_RUNNING; 1282 1283 err = 1; /* assume we're aborting because of an error */ 1284 1285 s = splhigh(); 1286 1287#ifndef PC98 1288 /* Suspend (on laptops) or receive-errors might have taken us offline */ 1289 outb(lpt_ctrl_port, LPC_ENA); 1290#endif 1291 1292 if (ifp->if_flags & IFF_LINK0) { 1293 1294 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1295 lprintf(("&")); 1296 lptintr(ifp->if_unit); 1297 } 1298 1299 /* Alert other end to pending packet */ 1300 spin = LPMAXSPIN1; 1301 outb(lpt_data_port, 0x08); 1302 while ((inb(lpt_stat_port) & 0x08) == 0) 1303 if (--spin == 0) { 1304 goto nend; 1305 } 1306 1307 /* Calculate length of packet, then send that */ 1308 1309 count += 14; /* Ethernet header len */ 1310 1311 mm = m; 1312 for (mm = m; mm; mm = mm->m_next) { 1313 count += mm->m_len; 1314 } 1315 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1316 goto nend; 1317 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1318 goto nend; 1319 1320 /* Send dummy ethernet header */ 1321 for (i = 0; i < 12; i++) { 1322 if (clpoutbyte(i, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1323 goto nend; 1324 chksum += i; 1325 } 1326 1327 if (clpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1328 goto nend; 1329 if (clpoutbyte(0x00, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1330 goto nend; 1331 chksum += 0x08 + 0x00; /* Add into checksum */ 1332 1333 mm = m; 1334 do { 1335 cp = mtod(mm, u_char *); 1336 while (mm->m_len--) { 1337 chksum += *cp; 1338 if (clpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1339 goto nend; 1340 } 1341 } while ((mm = mm->m_next)); 1342 1343 /* Send checksum */ 1344 if (clpoutbyte(chksum, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1345 goto nend; 1346 1347 /* Go quiescent */ 1348 outb(lpt_data_port, 0); 1349 1350 err = 0; /* No errors */ 1351 1352 nend: 1353 if (err) { /* if we didn't timeout... */ 1354 ifp->if_oerrors++; 1355 lprintf(("X")); 1356 } else { 1357 ifp->if_opackets++; 1358 ifp->if_obytes += m->m_pkthdr.len; 1359 } 1360 1361 m_freem(m); 1362 1363 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1364 lprintf(("^")); 1365 lptintr(ifp->if_unit); 1366 } 1367 (void) splx(s); 1368 return 0; 1369 } 1370 1371 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1372 lprintf(("&")); 1373 lptintr(ifp->if_unit); 1374 } 1375 1376 if (lpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1377 goto end; 1378 if (lpoutbyte(0x00, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1379 goto end; 1380 1381 mm = m; 1382 do { 1383 cp = mtod(mm,u_char *); 1384 while (mm->m_len--) 1385 if (lpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1386 goto end; 1387 } while ((mm = mm->m_next)); 1388 1389 err = 0; /* no errors were encountered */ 1390 1391 end: 1392 --cp; 1393 outb(lpt_data_port, txmitl[*cp] ^ 0x17); 1394 1395 if (err) { /* if we didn't timeout... */ 1396 ifp->if_oerrors++; 1397 lprintf(("X")); 1398 } else { 1399 ifp->if_opackets++; 1400 ifp->if_obytes += m->m_pkthdr.len; 1401 if (ifp->if_bpf) { 1402 /* 1403 * We need to prepend the packet type as 1404 * a two byte field. Cons up a dummy header 1405 * to pacify bpf. This is safe because bpf 1406 * will only read from the mbuf (i.e., it won't 1407 * try to free it or keep a pointer to it). 1408 */ 1409 struct mbuf m0; 1410 u_short hdr = 0x800; 1411 1412 m0.m_next = m; 1413 m0.m_len = 2; 1414 m0.m_data = (char *)&hdr; 1415 1416 bpf_mtap(ifp, &m0); 1417 } 1418 } 1419 1420 m_freem(m); 1421 1422 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1423 lprintf(("^")); 1424 lptintr(ifp->if_unit); 1425 } 1426 1427 (void) splx(s); 1428 return 0; 1429} 1430 1431#endif /* INET */ 1432 1433static int lpt_devsw_installed; 1434 1435static void lpt_drvinit(void *unused) 1436{ 1437 1438 if( ! lpt_devsw_installed ) { 1439 cdevsw_add(&lpt_cdevsw); 1440 lpt_devsw_installed = 1; 1441 } 1442} 1443#ifndef LPT_DRVINIT_AT_ATTACH 1444SYSINIT(lptdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,lpt_drvinit,NULL) 1445#endif 1446