olpt.c revision 55391
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 55391 2000-01-04 04:46:50Z 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#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 <i386/isa/isa_device.h> 121#include <i386/isa/lptreg.h> 122 123#ifdef INET 124#include <sys/malloc.h> 125#include <sys/mbuf.h> 126#include <sys/socket.h> 127#include <sys/sockio.h> 128 129#include <net/if.h> 130#include <net/if_types.h> 131#include <net/netisr.h> 132#include <netinet/in.h> 133#include <netinet/in_var.h> 134#include <net/bpf.h> 135#endif /* INET */ 136 137 138#define LPINITRDY 4 /* wait up to 4 seconds for a ready */ 139#define LPTOUTINITIAL 10 /* initial timeout to wait for ready 1/10 s */ 140#define LPTOUTMAX 1 /* maximal timeout 1 s */ 141#define LPPRI (PZERO+8) 142#define BUFSIZE 1024 143 144#ifdef INET 145#ifndef LPMTU /* MTU for the lp# interfaces */ 146#define LPMTU 1500 147#endif 148 149#ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 150#define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 151#endif 152 153#ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 154#define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 155#endif 156 157#ifndef LPMAXERRS /* Max errors before !RUNNING */ 158#define LPMAXERRS 100 159#endif 160 161#define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 162#define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 163#define MLPIPHDRLEN CLPIPHDRLEN 164 165#define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 166#define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 167#if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 168#define MLPIPHDRLEN LPIPHDRLEN 169#endif 170 171#define LPIPTBLSIZE 256 /* Size of octet translation table */ 172 173#endif /* INET */ 174 175#ifndef PC98 176/* BIOS printer list - used by BIOS probe*/ 177#define BIOS_LPT_PORTS 0x408 178#define BIOS_PORTS (short *)(KERNBASE+BIOS_LPT_PORTS) 179#define BIOS_MAX_LPT 4 180#endif 181 182 183#ifndef DEBUG 184#define lprintf(args) 185#else 186#define lprintf(args) do { \ 187 if (lptflag) \ 188 printf args; \ 189 } while (0) 190static int volatile lptflag = 1; 191#endif 192 193#define LPTUNIT(s) ((s)&0x03) 194#define LPTFLAGS(s) ((s)&0xfc) 195 196static struct lpt_softc { 197 int sc_port; 198 short sc_state; 199 /* default case: negative prime, negative ack, handshake strobe, 200 prime once */ 201 u_char sc_control; 202 char sc_flags; 203#define LP_POS_INIT 0x04 /* if we are a postive init signal */ 204#define LP_POS_ACK 0x08 /* if we are a positive going ack */ 205#define LP_NO_PRIME 0x10 /* don't prime the printer at all */ 206#define LP_PRIMEOPEN 0x20 /* prime on every open */ 207#define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */ 208#define LP_BYPASS 0x80 /* bypass printer ready checks */ 209 struct buf *sc_inbuf; 210 short sc_xfercnt ; 211 char sc_primed; 212 char *sc_cp ; 213 u_char sc_irq ; /* IRQ status of port */ 214#define LP_HAS_IRQ 0x01 /* we have an irq available */ 215#define LP_USE_IRQ 0x02 /* we are using our irq */ 216#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */ 217 u_char sc_backoff ; /* time to call lptout() again */ 218 219#ifdef INET 220 struct ifnet sc_if; 221 u_char *sc_ifbuf; 222 int sc_iferrs; 223#endif 224} lpt_sc[NOLPT] ; 225 226/* bits for state */ 227#define OPEN (1<<0) /* device is open */ 228#define ASLP (1<<1) /* awaiting draining of printer */ 229#define ERROR (1<<2) /* error was received from printer */ 230#define OBUSY (1<<3) /* printer is busy doing output */ 231#define LPTOUT (1<<4) /* timeout while not selected */ 232#define TOUT (1<<5) /* timeout while not selected */ 233#define INIT (1<<6) /* waiting to initialize for open */ 234#define INTERRUPTED (1<<7) /* write call was interrupted */ 235 236 237/* status masks to interrogate printer status */ 238#define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */ 239#define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR) 240 241/* Printer Ready condition - from lpa.c */ 242/* Only used in polling code */ 243#ifdef PC98 244#define NOT_READY(x) ((inb(x) & LPS_NBSY) != LPS_NBSY) 245#else /* IBM-PC */ 246#define LPS_INVERT (LPS_NBSY | LPS_NACK | LPS_SEL | LPS_NERR) 247#define LPS_MASK (LPS_NBSY | LPS_NACK | LPS_OUT | LPS_SEL | LPS_NERR) 248#define NOT_READY(x) ((inb(x)^LPS_INVERT)&LPS_MASK) 249#endif 250 251#define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */ 252#define MAX_SPIN 20 /* Max delay for device ready in usecs */ 253 254static timeout_t lptout; 255static int lptprobe (struct isa_device *dvp); 256static int lptattach (struct isa_device *isdp); 257static ointhand2_t lptintr; 258 259#ifdef INET 260 261/* Tables for the lp# interface */ 262static u_char *txmith; 263#define txmitl (txmith+(1*LPIPTBLSIZE)) 264#define trecvh (txmith+(2*LPIPTBLSIZE)) 265#define trecvl (txmith+(3*LPIPTBLSIZE)) 266 267static u_char *ctxmith; 268#define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 269#define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 270#define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 271 272/* Functions for the lp# interface */ 273static void lpattach(struct lpt_softc *,int); 274#ifndef PC98 275static int lpinittables(void); 276#endif 277static int lpioctl(struct ifnet *, u_long, caddr_t); 278static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 279 struct rtentry *); 280static void lpintr(int); 281#endif /* INET */ 282 283struct isa_driver olptdriver = { 284 lptprobe, lptattach, "olpt" 285}; 286 287static d_open_t lptopen; 288static d_close_t lptclose; 289static d_write_t lptwrite; 290static d_ioctl_t lptioctl; 291 292#define CDEV_MAJOR 16 293static struct cdevsw lpt_cdevsw = { 294 /* open */ lptopen, 295 /* close */ lptclose, 296 /* read */ noread, 297 /* write */ lptwrite, 298 /* ioctl */ lptioctl, 299 /* poll */ nopoll, 300 /* mmap */ nommap, 301 /* strategy */ nostrategy, 302 /* name */ "lpt", 303 /* maj */ CDEV_MAJOR, 304 /* dump */ nodump, 305 /* psize */ nopsize, 306 /* flags */ 0, 307 /* bmaj */ -1 308}; 309 310#ifndef PC98 311/* 312 * Internal routine to lptprobe to do port tests of one byte value 313 */ 314static int 315lpt_port_test (int port, u_char data, u_char mask) 316{ 317 int temp, timeout; 318 319 data = data & mask; 320 outb(port, data); 321 timeout = 10000; 322 do { 323 DELAY(10); 324 temp = inb(port) & mask; 325 } 326 while (temp != data && --timeout); 327 lprintf(("Port 0x%x\tout=%x\tin=%x\ttout=%d\n", 328 port, data, temp, timeout)); 329 return (temp == data); 330} 331#endif /* PC98 */ 332 333/* 334 * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94 335 * Based partially on Rod Grimes' printer probe 336 * 337 * Logic: 338 * 1) If no port address was given, use the bios detected ports 339 * and autodetect what ports the printers are on. 340 * 2) Otherwise, probe the data port at the address given, 341 * using the method in Rod Grimes' port probe. 342 * (Much code ripped off directly from Rod's probe.) 343 * 344 * Comments from Rod's probe: 345 * Logic: 346 * 1) You should be able to write to and read back the same value 347 * to the data port. Do an alternating zeros, alternating ones, 348 * walking zero, and walking one test to check for stuck bits. 349 * 350 * 2) You should be able to write to and read back the same value 351 * to the control port lower 5 bits, the upper 3 bits are reserved 352 * per the IBM PC technical reference manauls and different boards 353 * do different things with them. Do an alternating zeros, alternating 354 * ones, walking zero, and walking one test to check for stuck bits. 355 * 356 * Some printers drag the strobe line down when the are powered off 357 * so this bit has been masked out of the control port test. 358 * 359 * XXX Some printers may not like a fast pulse on init or strobe, I 360 * don't know at this point, if that becomes a problem these bits 361 * should be turned off in the mask byte for the control port test. 362 * 363 * We are finally left with a mask of 0x14, due to some printers 364 * being adamant about holding other bits high ........ 365 * 366 * Before probing the control port, we write a 0 to the data port - 367 * If not, some printers chuck out garbage when the strobe line 368 * gets toggled. 369 * 370 * 3) Set the data and control ports to a value of 0 371 * 372 * This probe routine has been tested on Epson Lx-800, HP LJ3P, 373 * Epson FX-1170 and C.Itoh 8510RM 374 * printers. 375 * Quick exit on fail added. 376 */ 377 378int 379lptprobe(struct isa_device *dvp) 380{ 381#ifdef PC98 382#define PC98_OLD_LPT 0x40 383#define PC98_IEEE_1284_FUNCTION 0x149 384 unsigned int pc98_ieee_mode, tmp; 385 386 if (dvp->id_iobase == PC98_OLD_LPT) { 387 tmp = inb(PC98_IEEE_1284_FUNCTION); 388 pc98_ieee_mode = tmp; 389 if ((tmp & 0x10) == 0x10) { 390 outb(PC98_IEEE_1284_FUNCTION, tmp & ~0x10); 391 tmp = inb(PC98_IEEE_1284_FUNCTION); 392 if ((tmp & 0x10) != 0x10) { 393 outb(PC98_IEEE_1284_FUNCTION, pc98_ieee_mode); 394 return 0; 395 } 396 } 397 } 398 return 8; 399#else 400 int port; 401 static short next_bios_lpt = 0; 402 int status; 403 static u_char testbyte[18] = { 404 0x55, /* alternating zeros */ 405 0xaa, /* alternating ones */ 406 0xfe, 0xfd, 0xfb, 0xf7, 407 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */ 408 0x01, 0x02, 0x04, 0x08, 409 0x10, 0x20, 0x40, 0x80 /* walking one */ 410 }; 411 int i; 412 413 /* 414 * Make sure there is some way for lptopen to see that 415 * the port is not configured 416 * This 0 will remain if the port isn't attached 417 */ 418 (lpt_sc + dvp->id_unit)->sc_port = 0; 419 420 status = IO_LPTSIZE; 421 /* If port not specified, use bios list */ 422 if(dvp->id_iobase < 0) { /* port? */ 423 if((next_bios_lpt < BIOS_MAX_LPT) && 424 (*(BIOS_PORTS+next_bios_lpt) != 0) ) { 425 dvp->id_iobase = *(BIOS_PORTS+next_bios_lpt++); 426 goto end_probe; 427 } else 428 return (0); 429 } 430 431 /* Port was explicitly specified */ 432 /* This allows probing of ports unknown to the BIOS */ 433 port = dvp->id_iobase + lpt_data; 434 for (i = 0; i < 18; i++) { 435 if (!lpt_port_test(port, testbyte[i], 0xff)) { 436 status = 0; 437 goto end_probe; 438 } 439 } 440 441end_probe: 442 /* write 0's to control and data ports */ 443 outb(dvp->id_iobase+lpt_data, 0); 444 outb(dvp->id_iobase+lpt_control, 0); 445 446 return (status); 447#endif 448} 449 450/* XXX Todo - try and detect if interrupt is working */ 451int 452lptattach(struct isa_device *isdp) 453{ 454 struct lpt_softc *sc; 455 int unit; 456 457 isdp->id_ointr = lptintr; 458 unit = isdp->id_unit; 459 sc = lpt_sc + unit; 460 sc->sc_port = isdp->id_iobase; 461 sc->sc_primed = 0; /* not primed yet */ 462#ifdef PC98 463 outb(sc->sc_port+lpt_pstb_ctrl, LPC_DIS_PSTB); /* PSTB disable */ 464 outb(sc->sc_port+lpt_control, LPC_MODE8255); /* 8255 mode set */ 465 outb(sc->sc_port+lpt_control, LPC_NIRQ8); /* IRQ8 inactive */ 466 outb(sc->sc_port+lpt_control, LPC_NPSTB); /* PSTB inactive */ 467 outb(sc->sc_port+lpt_pstb_ctrl, LPC_EN_PSTB); /* PSTB enable */ 468#else 469 outb(sc->sc_port+lpt_control, LPC_NINIT); 470#endif 471 472 /* check if we can use interrupt */ 473 lprintf(("oldirq %x\n", sc->sc_irq)); 474 if (isdp->id_irq) { 475 sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ; 476 printf("lpt%d: Interrupt-driven port\n", unit); 477#ifdef INET 478 lpattach(sc, unit); 479#endif 480 } else { 481 sc->sc_irq = 0; 482 lprintf(("lpt%d: Polled port\n", unit)); 483 } 484 lprintf(("irq %x\n", sc->sc_irq)); 485 486 /* XXX what to do about the flags in the minor number? */ 487 make_dev(&lpt_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit); 488 make_dev(&lpt_cdevsw, unit | LP_BYPASS, 489 UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit); 490 return (1); 491} 492 493/* 494 * lptopen -- reset the printer, then wait until it's selected and not busy. 495 * If LP_BYPASS flag is selected, then we do not try to select the 496 * printer -- this is just used for passing ioctls. 497 */ 498 499static int 500lptopen (dev_t dev, int flags, int fmt, struct proc *p) 501{ 502 struct lpt_softc *sc; 503 int s; 504#ifdef PC98 505 int port; 506#else 507 int trys, port; 508#endif 509 u_int unit = LPTUNIT(minor(dev)); 510 511 sc = lpt_sc + unit; 512 if ((unit >= NOLPT) || (sc->sc_port == 0)) 513 return (ENXIO); 514 515#ifdef INET 516 if (sc->sc_if.if_flags & IFF_UP) 517 return(EBUSY); 518#endif 519 520 if (sc->sc_state) { 521 lprintf(("lp: still open %x\n", sc->sc_state)); 522 return(EBUSY); 523 } else 524 sc->sc_state |= INIT; 525 526 sc->sc_flags = LPTFLAGS(minor(dev)); 527 528 /* Check for open with BYPASS flag set. */ 529 if (sc->sc_flags & LP_BYPASS) { 530 sc->sc_state = OPEN; 531 return(0); 532 } 533 534 s = spltty(); 535 lprintf(("lp flags 0x%x\n", sc->sc_flags)); 536 port = sc->sc_port; 537 538 /* set IRQ status according to ENABLE_IRQ flag */ 539 if (sc->sc_irq & LP_ENABLE_IRQ) 540 sc->sc_irq |= LP_USE_IRQ; 541 else 542 sc->sc_irq &= ~LP_USE_IRQ; 543 544 /* init printer */ 545#ifndef PC98 546 if ((sc->sc_flags & LP_NO_PRIME) == 0) { 547 if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) { 548 outb(port+lpt_control, 0); 549 sc->sc_primed++; 550 DELAY(500); 551 } 552 } 553 554 outb (port+lpt_control, LPC_SEL|LPC_NINIT); 555 556 /* wait till ready (printer running diagnostics) */ 557 trys = 0; 558 do { 559 /* ran out of waiting for the printer */ 560 if (trys++ >= LPINITRDY*4) { 561 splx(s); 562 sc->sc_state = 0; 563 lprintf(("status %x\n", inb(port+lpt_status))); 564 return (EBUSY); 565 } 566 567 /* wait 1/4 second, give up if we get a signal */ 568 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, "lptinit", hz/4) != 569 EWOULDBLOCK) { 570 sc->sc_state = 0; 571 splx(s); 572 return (EBUSY); 573 } 574 575 /* is printer online and ready for output */ 576 } while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 577 (LPS_SEL|LPS_NBSY|LPS_NERR)); 578 579 sc->sc_control = LPC_SEL|LPC_NINIT; 580 if (sc->sc_flags & LP_AUTOLF) 581 sc->sc_control |= LPC_AUTOL; 582 583 /* enable interrupt if interrupt-driven */ 584 if (sc->sc_irq & LP_USE_IRQ) 585 sc->sc_control |= LPC_ENA; 586 587 outb(port+lpt_control, sc->sc_control); 588#endif 589 590 sc->sc_state = OPEN; 591 sc->sc_inbuf = geteblk(BUFSIZE); 592 sc->sc_xfercnt = 0; 593 splx(s); 594 595 /* only use timeout if using interrupt */ 596 lprintf(("irq %x\n", sc->sc_irq)); 597 if (sc->sc_irq & LP_USE_IRQ) { 598 sc->sc_state |= TOUT; 599 timeout (lptout, (caddr_t)sc, 600 (sc->sc_backoff = hz/LPTOUTINITIAL)); 601 } 602 603 lprintf(("opened.\n")); 604 return(0); 605} 606 607static void 608lptout (void *arg) 609{ 610 struct lpt_softc *sc = arg; 611 int pl; 612 613 lprintf(("T %x ", inb(sc->sc_port+lpt_status))); 614 if (sc->sc_state & OPEN) { 615 sc->sc_backoff++; 616 if (sc->sc_backoff > hz/LPTOUTMAX) 617 sc->sc_backoff = sc->sc_backoff > hz/LPTOUTMAX; 618 timeout (lptout, (caddr_t)sc, sc->sc_backoff); 619 } else 620 sc->sc_state &= ~TOUT; 621 622 if (sc->sc_state & ERROR) 623 sc->sc_state &= ~ERROR; 624 625 /* 626 * Avoid possible hangs do to missed interrupts 627 */ 628 if (sc->sc_xfercnt) { 629 pl = spltty(); 630 lptintr(sc - lpt_sc); 631 splx(pl); 632 } else { 633 sc->sc_state &= ~OBUSY; 634 wakeup((caddr_t)sc); 635 } 636} 637 638/* 639 * lptclose -- close the device, free the local line buffer. 640 * 641 * Check for interrupted write call added. 642 */ 643 644static int 645lptclose(dev_t dev, int flags, int fmt, struct proc *p) 646{ 647 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 648#ifndef PC98 649 int port = sc->sc_port; 650#endif 651 652 if(sc->sc_flags & LP_BYPASS) 653 goto end_close; 654 655 sc->sc_state &= ~OPEN; 656 657#ifndef PC98 658 /* if the last write was interrupted, don't complete it */ 659 if((!(sc->sc_state & INTERRUPTED)) && (sc->sc_irq & LP_USE_IRQ)) 660 while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 661 (LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt) 662 /* wait 1/4 second, give up if we get a signal */ 663 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, 664 "lpclose", hz) != EWOULDBLOCK) 665 break; 666 667 outb(sc->sc_port+lpt_control, LPC_NINIT); 668#endif 669 brelse(sc->sc_inbuf); 670 671end_close: 672 sc->sc_state = 0; 673 sc->sc_xfercnt = 0; 674 lprintf(("closed.\n")); 675 return(0); 676} 677 678/* 679 * pushbytes() 680 * Workhorse for actually spinning and writing bytes to printer 681 * Derived from lpa.c 682 * Originally by ? 683 * 684 * This code is only used when we are polling the port 685 */ 686static int 687pushbytes(struct lpt_softc * sc) 688{ 689 int spin, err, tic; 690 char ch; 691 int port = sc->sc_port; 692 693 lprintf(("p")); 694 /* loop for every character .. */ 695 while (sc->sc_xfercnt > 0) { 696 /* printer data */ 697 ch = *(sc->sc_cp); 698 sc->sc_cp++; 699 sc->sc_xfercnt--; 700 701 /* 702 * Wait for printer ready. 703 * Loop 20 usecs testing BUSY bit, then sleep 704 * for exponentially increasing timeout. (vak) 705 */ 706 for (spin=0; NOT_READY(port+lpt_status) && spin<MAX_SPIN; ++spin) 707 DELAY(1); /* XXX delay is NOT this accurate! */ 708 if (spin >= MAX_SPIN) { 709 tic = 0; 710 while (NOT_READY(port+lpt_status)) { 711 /* 712 * Now sleep, every cycle a 713 * little longer .. 714 */ 715 tic = tic + tic + 1; 716 /* 717 * But no more than 10 seconds. (vak) 718 */ 719 if (tic > MAX_SLEEP) 720 tic = MAX_SLEEP; 721 err = tsleep((caddr_t)sc, LPPRI, 722 "lptpoll", tic); 723 if (err != EWOULDBLOCK) { 724 return (err); 725 } 726 } 727 } 728 729 /* output data */ 730 outb(port+lpt_data, ch); 731#ifdef PC98 732 DELAY(1); 733 outb(port+lpt_control, LPC_PSTB); 734 DELAY(1); 735 outb(port+lpt_control, LPC_NPSTB); 736#else 737 /* strobe */ 738 outb(port+lpt_control, sc->sc_control|LPC_STB); 739 outb(port+lpt_control, sc->sc_control); 740#endif 741 742 } 743 return(0); 744} 745 746/* 747 * lptwrite --copy a line from user space to a local buffer, then call 748 * putc to get the chars moved to the output queue. 749 * 750 * Flagging of interrupted write added. 751 */ 752 753static int 754lptwrite(dev_t dev, struct uio * uio, int ioflag) 755{ 756 register unsigned n; 757 int pl, err; 758 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 759 760 if(sc->sc_flags & LP_BYPASS) { 761 /* we can't do writes in bypass mode */ 762 return(EPERM); 763 } 764 765 sc->sc_state &= ~INTERRUPTED; 766 while ((n = min(BUFSIZE, uio->uio_resid)) != 0) { 767 sc->sc_cp = sc->sc_inbuf->b_data ; 768 uiomove(sc->sc_cp, n, uio); 769 sc->sc_xfercnt = n ; 770 while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) { 771 lprintf(("i")); 772 /* if the printer is ready for a char, */ 773 /* give it one */ 774 if ((sc->sc_state & OBUSY) == 0){ 775 lprintf(("\nC %d. ", sc->sc_xfercnt)); 776 pl = spltty(); 777 lptintr(sc - lpt_sc); 778 (void) splx(pl); 779 } 780 lprintf(("W ")); 781 if (sc->sc_state & OBUSY) 782 if ((err = tsleep ((caddr_t)sc, 783 LPPRI|PCATCH, "lpwrite", 0))) { 784 sc->sc_state |= INTERRUPTED; 785 return(err); 786 } 787 } 788 /* check to see if we must do a polled write */ 789 if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) { 790 lprintf(("p")); 791 if((err = pushbytes(sc))) 792 return(err); 793 } 794 } 795 return(0); 796} 797 798/* 799 * lptintr -- handle printer interrupts which occur when the printer is 800 * ready to accept another char. 801 * 802 * do checking for interrupted write call. 803 */ 804 805static void 806lptintr(int unit) 807{ 808#if defined(INET) || !defined(PC98) 809 struct lpt_softc *sc = lpt_sc + unit; 810#endif 811#ifndef PC98 812 int port = sc->sc_port, sts; 813 int i; 814#endif 815 816#ifdef INET 817 if(sc->sc_if.if_flags & IFF_UP) { 818 lpintr(unit); 819 return; 820 } 821#endif /* INET */ 822 823#ifndef PC98 824 /* 825 * Is printer online and ready for output? 826 * 827 * Avoid falling back to lptout() too quickly. First spin-loop 828 * to see if the printer will become ready ``really soon now''. 829 */ 830 for (i = 0; 831 i < 100 && 832 ((sts=inb(port+lpt_status)) & RDY_MASK) != LP_READY; 833 i++) ; 834 if ((sts & RDY_MASK) == LP_READY) { 835 sc->sc_state = (sc->sc_state | OBUSY) & ~ERROR; 836 sc->sc_backoff = hz/LPTOUTINITIAL; 837 838 if (sc->sc_xfercnt) { 839 /* send char */ 840 /*lprintf(("%x ", *sc->sc_cp)); */ 841 outb(port+lpt_data, *sc->sc_cp++) ; 842 outb(port+lpt_control, sc->sc_control|LPC_STB); 843 /* DELAY(X) */ 844 outb(port+lpt_control, sc->sc_control); 845 846 /* any more data for printer */ 847 if(--(sc->sc_xfercnt) > 0) return; 848 } 849 850 /* 851 * No more data waiting for printer. 852 * Wakeup is not done if write call was interrupted. 853 */ 854 sc->sc_state &= ~OBUSY; 855 if(!(sc->sc_state & INTERRUPTED)) 856 wakeup((caddr_t)sc); 857 lprintf(("w ")); 858 return; 859 } else { /* check for error */ 860 if(((sts & (LPS_NERR | LPS_OUT) ) != LPS_NERR) && 861 (sc->sc_state & OPEN)) 862 sc->sc_state |= ERROR; 863 /* lptout() will jump in and try to restart. */ 864 } 865#endif 866 lprintf(("sts %x ", sts)); 867} 868 869static int 870lptioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p) 871{ 872 int error = 0; 873 struct lpt_softc *sc; 874 u_int unit = LPTUNIT(minor(dev)); 875 u_char old_sc_irq; /* old printer IRQ status */ 876 877 sc = lpt_sc + unit; 878 879 switch (cmd) { 880 case LPT_IRQ : 881 if(sc->sc_irq & LP_HAS_IRQ) { 882 /* 883 * NOTE: 884 * If the IRQ status is changed, 885 * this will only be visible on the 886 * next open. 887 * 888 * If interrupt status changes, 889 * this gets syslog'd. 890 */ 891 old_sc_irq = sc->sc_irq; 892 if(*(int*)data == 0) 893 sc->sc_irq &= (~LP_ENABLE_IRQ); 894 else 895 sc->sc_irq |= LP_ENABLE_IRQ; 896 if (old_sc_irq != sc->sc_irq ) 897 log(LOG_NOTICE, "lpt%c switched to %s mode\n", 898 (char)unit+'0', 899 (sc->sc_irq & LP_ENABLE_IRQ)? 900 "interrupt-driven":"polled"); 901 } else /* polled port */ 902 error = EOPNOTSUPP; 903 break; 904 default: 905 error = ENODEV; 906 } 907 908 return(error); 909} 910 911#ifdef INET 912 913static void 914lpattach (struct lpt_softc *sc, int unit) 915{ 916 struct ifnet *ifp = &sc->sc_if; 917 918 ifp->if_softc = sc; 919 ifp->if_name = "lp"; 920 ifp->if_unit = unit; 921 ifp->if_mtu = LPMTU; 922 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 923 ifp->if_ioctl = lpioctl; 924 ifp->if_output = lpoutput; 925 ifp->if_type = IFT_PARA; 926 ifp->if_hdrlen = 0; 927 ifp->if_addrlen = 0; 928 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 929 if_attach(ifp); 930 printf("lp%d: TCP/IP capable interface\n", unit); 931 932 bpfattach(ifp, DLT_NULL, LPIPHDRLEN); 933} 934 935#ifndef PC98 936/* 937 * Build the translation tables for the LPIP (BSD unix) protocol. 938 * We don't want to calculate these nasties in our tight loop, so we 939 * precalculate them when we initialize. 940 */ 941static int 942lpinittables (void) 943{ 944 int i; 945 946 if (!txmith) 947 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 948 949 if (!txmith) 950 return 1; 951 952 if (!ctxmith) 953 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 954 955 if (!ctxmith) 956 return 1; 957 958 for (i=0; i < LPIPTBLSIZE; i++) { 959 ctxmith[i] = (i & 0xF0) >> 4; 960 ctxmitl[i] = 0x10 | (i & 0x0F); 961 ctrecvh[i] = (i & 0x78) << 1; 962 ctrecvl[i] = (i & 0x78) >> 3; 963 } 964 965 for (i=0; i < LPIPTBLSIZE; i++) { 966 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 967 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 968 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 969 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 970 } 971 972 return 0; 973} 974#endif /* PC98 */ 975 976/* 977 * Process an ioctl request. 978 */ 979 980static int 981lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 982{ 983 struct lpt_softc *sc = lpt_sc + ifp->if_unit; 984 struct ifaddr *ifa = (struct ifaddr *)data; 985 struct ifreq *ifr = (struct ifreq *)data; 986 u_char *ptr; 987 988 switch (cmd) { 989 990 case SIOCSIFDSTADDR: 991 case SIOCAIFADDR: 992 case SIOCSIFADDR: 993 if (ifa->ifa_addr->sa_family != AF_INET) 994 return EAFNOSUPPORT; 995 ifp->if_flags |= IFF_UP; 996 /* FALLTHROUGH */ 997 case SIOCSIFFLAGS: 998 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 999 outb(sc->sc_port + lpt_control, 0x00); 1000 ifp->if_flags &= ~IFF_RUNNING; 1001 break; 1002 } 1003#ifdef PC98 1004 /* XXX */ 1005 return ENOBUFS; 1006#else 1007 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 1008 if (lpinittables()) 1009 return ENOBUFS; 1010 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 1011 M_DEVBUF, M_WAITOK); 1012 if (!sc->sc_ifbuf) 1013 return ENOBUFS; 1014 1015 outb(sc->sc_port + lpt_control, LPC_ENA); 1016 ifp->if_flags |= IFF_RUNNING; 1017 } 1018 break; 1019#endif 1020 case SIOCSIFMTU: 1021 ptr = sc->sc_ifbuf; 1022 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 1023 if (!sc->sc_ifbuf) { 1024 sc->sc_ifbuf = ptr; 1025 return ENOBUFS; 1026 } 1027 if (ptr) 1028 free(ptr,M_DEVBUF); 1029 sc->sc_if.if_mtu = ifr->ifr_mtu; 1030 break; 1031 1032 case SIOCGIFMTU: 1033 ifr->ifr_mtu = sc->sc_if.if_mtu; 1034 break; 1035 1036 case SIOCADDMULTI: 1037 case SIOCDELMULTI: 1038 if (ifr == 0) { 1039 return EAFNOSUPPORT; /* XXX */ 1040 } 1041 switch (ifr->ifr_addr.sa_family) { 1042 1043#ifdef INET 1044 case AF_INET: 1045 break; 1046#endif 1047 1048 default: 1049 return EAFNOSUPPORT; 1050 } 1051 break; 1052 1053 default: 1054 lprintf(("LP:ioctl(0x%lx)\n", cmd)); 1055 return EINVAL; 1056 } 1057 return 0; 1058} 1059 1060static __inline int 1061clpoutbyte (u_char byte, int spin, int data_port, int status_port) 1062{ 1063 outb(data_port, ctxmitl[byte]); 1064 while (inb(status_port) & CLPIP_SHAKE) 1065 if (--spin == 0) { 1066 return 1; 1067 } 1068 outb(data_port, ctxmith[byte]); 1069 while (!(inb(status_port) & CLPIP_SHAKE)) 1070 if (--spin == 0) { 1071 return 1; 1072 } 1073 return 0; 1074} 1075 1076static __inline int 1077clpinbyte (int spin, int data_port, int status_port) 1078{ 1079 int c, cl; 1080 1081 while((inb(status_port) & CLPIP_SHAKE)) 1082 if(!--spin) { 1083 return -1; 1084 } 1085 cl = inb(status_port); 1086 outb(data_port, 0x10); 1087 1088 while(!(inb(status_port) & CLPIP_SHAKE)) 1089 if(!--spin) { 1090 return -1; 1091 } 1092 c = inb(status_port); 1093 outb(data_port, 0x00); 1094 1095 return (ctrecvl[cl] | ctrecvh[c]); 1096} 1097 1098static void 1099lpintr (int unit) 1100{ 1101 struct lpt_softc *sc = lpt_sc + unit; 1102 register int lpt_data_port = sc->sc_port + lpt_data; 1103 register int lpt_stat_port = sc->sc_port + lpt_status; 1104 int lpt_ctrl_port = sc->sc_port + lpt_control; 1105 int len, s, j; 1106 u_char *bp; 1107 u_char c, cl; 1108 struct mbuf *top; 1109 1110 s = splhigh(); 1111 1112 if (sc->sc_if.if_flags & IFF_LINK0) { 1113 1114 /* Ack. the request */ 1115 outb(lpt_data_port, 0x01); 1116 1117 /* Get the packet length */ 1118 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1119 if (j == -1) 1120 goto err; 1121 len = j; 1122 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1123 if (j == -1) 1124 goto err; 1125 len = len + (j << 8); 1126 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 1127 goto err; 1128 1129 bp = sc->sc_ifbuf; 1130 1131 while (len--) { 1132 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1133 if (j == -1) { 1134 goto err; 1135 } 1136 *bp++ = j; 1137 } 1138 /* Get and ignore checksum */ 1139 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1140 if (j == -1) { 1141 goto err; 1142 } 1143 1144 len = bp - sc->sc_ifbuf; 1145 if (len <= CLPIPHDRLEN) 1146 goto err; 1147 1148 sc->sc_iferrs = 0; 1149 1150 if (IF_QFULL(&ipintrq)) { 1151 lprintf(("DROP")); 1152 IF_DROP(&ipintrq); 1153 goto done; 1154 } 1155 len -= CLPIPHDRLEN; 1156 sc->sc_if.if_ipackets++; 1157 sc->sc_if.if_ibytes += len; 1158 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 1159 if (top) { 1160 IF_ENQUEUE(&ipintrq, top); 1161 schednetisr(NETISR_IP); 1162 } 1163 goto done; 1164 } 1165 while ((inb(lpt_stat_port) & LPIP_SHAKE)) { 1166 len = sc->sc_if.if_mtu + LPIPHDRLEN; 1167 bp = sc->sc_ifbuf; 1168 while (len--) { 1169 1170 cl = inb(lpt_stat_port); 1171 outb(lpt_data_port, 8); 1172 1173 j = LPMAXSPIN2; 1174 while((inb(lpt_stat_port) & LPIP_SHAKE)) 1175 if(!--j) goto err; 1176 1177 c = inb(lpt_stat_port); 1178 outb(lpt_data_port, 0); 1179 1180 *bp++= trecvh[cl] | trecvl[c]; 1181 1182 j = LPMAXSPIN2; 1183 while (!((cl=inb(lpt_stat_port)) & LPIP_SHAKE)) { 1184 if (cl != c && 1185 (((cl = inb(lpt_stat_port)) ^ 0xb8) & 0xf8) == 1186 (c & 0xf8)) 1187 goto end; 1188 if (!--j) goto err; 1189 } 1190 } 1191 1192 end: 1193 len = bp - sc->sc_ifbuf; 1194 if (len <= LPIPHDRLEN) 1195 goto err; 1196 1197 sc->sc_iferrs = 0; 1198 1199 if (IF_QFULL(&ipintrq)) { 1200 lprintf(("DROP")); 1201 IF_DROP(&ipintrq); 1202 goto done; 1203 } 1204 if (sc->sc_if.if_bpf) { 1205 bpf_tap(&sc->sc_if, sc->sc_ifbuf, len); 1206 } 1207 len -= LPIPHDRLEN; 1208 sc->sc_if.if_ipackets++; 1209 sc->sc_if.if_ibytes += len; 1210 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 1211 if (top) { 1212 IF_ENQUEUE(&ipintrq, top); 1213 schednetisr(NETISR_IP); 1214 } 1215 } 1216 goto done; 1217 1218 err: 1219 outb(lpt_data_port, 0); 1220 lprintf(("R")); 1221 sc->sc_if.if_ierrors++; 1222 sc->sc_iferrs++; 1223 1224 /* 1225 * We are not able to send receive anything for now, 1226 * so stop wasting our time 1227 */ 1228 if (sc->sc_iferrs > LPMAXERRS) { 1229 printf("lp%d: Too many errors, Going off-line.\n", unit); 1230 outb(lpt_ctrl_port, 0x00); 1231 sc->sc_if.if_flags &= ~IFF_RUNNING; 1232 sc->sc_iferrs=0; 1233 } 1234 1235 done: 1236 splx(s); 1237 return; 1238} 1239 1240static __inline int 1241lpoutbyte (u_char byte, int spin, int data_port, int status_port) 1242{ 1243 outb(data_port, txmith[byte]); 1244 while (!(inb(status_port) & LPIP_SHAKE)) 1245 if (--spin == 0) 1246 return 1; 1247 outb(data_port, txmitl[byte]); 1248 while (inb(status_port) & LPIP_SHAKE) 1249 if (--spin == 0) 1250 return 1; 1251 return 0; 1252} 1253 1254static int 1255lpoutput (struct ifnet *ifp, struct mbuf *m, 1256 struct sockaddr *dst, struct rtentry *rt) 1257{ 1258 register int lpt_data_port = lpt_sc[ifp->if_unit].sc_port + lpt_data; 1259 register int lpt_stat_port = lpt_sc[ifp->if_unit].sc_port + lpt_status; 1260#ifndef PC98 1261 int lpt_ctrl_port = lpt_sc[ifp->if_unit].sc_port + lpt_control; 1262#endif 1263 1264 int s, err; 1265 struct mbuf *mm; 1266 u_char *cp = "\0\0"; 1267 u_char chksum = 0; 1268 int count = 0; 1269 int i; 1270 int spin; 1271 1272 /* We need a sensible value if we abort */ 1273 cp++; 1274 ifp->if_flags |= IFF_RUNNING; 1275 1276 err = 1; /* assume we're aborting because of an error */ 1277 1278 s = splhigh(); 1279 1280#ifndef PC98 1281 /* Suspend (on laptops) or receive-errors might have taken us offline */ 1282 outb(lpt_ctrl_port, LPC_ENA); 1283#endif 1284 1285 if (ifp->if_flags & IFF_LINK0) { 1286 1287 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1288 lprintf(("&")); 1289 lptintr(ifp->if_unit); 1290 } 1291 1292 /* Alert other end to pending packet */ 1293 spin = LPMAXSPIN1; 1294 outb(lpt_data_port, 0x08); 1295 while ((inb(lpt_stat_port) & 0x08) == 0) 1296 if (--spin == 0) { 1297 goto nend; 1298 } 1299 1300 /* Calculate length of packet, then send that */ 1301 1302 count += 14; /* Ethernet header len */ 1303 1304 mm = m; 1305 for (mm = m; mm; mm = mm->m_next) { 1306 count += mm->m_len; 1307 } 1308 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1309 goto nend; 1310 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1311 goto nend; 1312 1313 /* Send dummy ethernet header */ 1314 for (i = 0; i < 12; i++) { 1315 if (clpoutbyte(i, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1316 goto nend; 1317 chksum += i; 1318 } 1319 1320 if (clpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1321 goto nend; 1322 if (clpoutbyte(0x00, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1323 goto nend; 1324 chksum += 0x08 + 0x00; /* Add into checksum */ 1325 1326 mm = m; 1327 do { 1328 cp = mtod(mm, u_char *); 1329 while (mm->m_len--) { 1330 chksum += *cp; 1331 if (clpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1332 goto nend; 1333 } 1334 } while ((mm = mm->m_next)); 1335 1336 /* Send checksum */ 1337 if (clpoutbyte(chksum, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1338 goto nend; 1339 1340 /* Go quiescent */ 1341 outb(lpt_data_port, 0); 1342 1343 err = 0; /* No errors */ 1344 1345 nend: 1346 if (err) { /* if we didn't timeout... */ 1347 ifp->if_oerrors++; 1348 lprintf(("X")); 1349 } else { 1350 ifp->if_opackets++; 1351 ifp->if_obytes += m->m_pkthdr.len; 1352 } 1353 1354 m_freem(m); 1355 1356 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1357 lprintf(("^")); 1358 lptintr(ifp->if_unit); 1359 } 1360 (void) splx(s); 1361 return 0; 1362 } 1363 1364 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1365 lprintf(("&")); 1366 lptintr(ifp->if_unit); 1367 } 1368 1369 if (lpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1370 goto end; 1371 if (lpoutbyte(0x00, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1372 goto end; 1373 1374 mm = m; 1375 do { 1376 cp = mtod(mm,u_char *); 1377 while (mm->m_len--) 1378 if (lpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1379 goto end; 1380 } while ((mm = mm->m_next)); 1381 1382 err = 0; /* no errors were encountered */ 1383 1384 end: 1385 --cp; 1386 outb(lpt_data_port, txmitl[*cp] ^ 0x17); 1387 1388 if (err) { /* if we didn't timeout... */ 1389 ifp->if_oerrors++; 1390 lprintf(("X")); 1391 } else { 1392 ifp->if_opackets++; 1393 ifp->if_obytes += m->m_pkthdr.len; 1394 if (ifp->if_bpf) { 1395 /* 1396 * We need to prepend the packet type as 1397 * a two byte field. Cons up a dummy header 1398 * to pacify bpf. This is safe because bpf 1399 * will only read from the mbuf (i.e., it won't 1400 * try to free it or keep a pointer to it). 1401 */ 1402 struct mbuf m0; 1403 u_short hdr = 0x800; 1404 1405 m0.m_next = m; 1406 m0.m_len = 2; 1407 m0.m_data = (char *)&hdr; 1408 1409 bpf_mtap(ifp, &m0); 1410 } 1411 } 1412 1413 m_freem(m); 1414 1415 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1416 lprintf(("^")); 1417 lptintr(ifp->if_unit); 1418 } 1419 1420 (void) splx(s); 1421 return 0; 1422} 1423 1424#endif /* INET */ 1425 1426static int lpt_devsw_installed; 1427 1428static void lpt_drvinit(void *unused) 1429{ 1430 1431 if( ! lpt_devsw_installed ) { 1432 cdevsw_add(&lpt_cdevsw); 1433 lpt_devsw_installed = 1; 1434 } 1435} 1436 1437SYSINIT(lptdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,lpt_drvinit,NULL) 1438 1439