olpt.c revision 50477
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 50477 1999-08-28 01:08:13Z peter $ 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 "bpf.h" 144#if NBPF > 0 145#include <net/bpf.h> 146#endif 147#endif /* INET */ 148 149 150#define LPINITRDY 4 /* wait up to 4 seconds for a ready */ 151#define LPTOUTINITIAL 10 /* initial timeout to wait for ready 1/10 s */ 152#define LPTOUTMAX 1 /* maximal timeout 1 s */ 153#define LPPRI (PZERO+8) 154#define BUFSIZE 1024 155 156#ifdef INET 157#ifndef LPMTU /* MTU for the lp# interfaces */ 158#define LPMTU 1500 159#endif 160 161#ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */ 162#define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */ 163#endif 164 165#ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */ 166#define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */ 167#endif 168 169#ifndef LPMAXERRS /* Max errors before !RUNNING */ 170#define LPMAXERRS 100 171#endif 172 173#define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */ 174#define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */ 175#define MLPIPHDRLEN CLPIPHDRLEN 176 177#define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */ 178#define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */ 179#if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN 180#define MLPIPHDRLEN LPIPHDRLEN 181#endif 182 183#define LPIPTBLSIZE 256 /* Size of octet translation table */ 184 185#endif /* INET */ 186 187#ifndef PC98 188/* BIOS printer list - used by BIOS probe*/ 189#define BIOS_LPT_PORTS 0x408 190#define BIOS_PORTS (short *)(KERNBASE+BIOS_LPT_PORTS) 191#define BIOS_MAX_LPT 4 192#endif 193 194 195#ifndef DEBUG 196#define lprintf(args) 197#else 198#define lprintf(args) do { \ 199 if (lptflag) \ 200 printf args; \ 201 } while (0) 202static int volatile lptflag = 1; 203#endif 204 205#define LPTUNIT(s) ((s)&0x03) 206#define LPTFLAGS(s) ((s)&0xfc) 207 208static struct lpt_softc { 209 int sc_port; 210 short sc_state; 211 /* default case: negative prime, negative ack, handshake strobe, 212 prime once */ 213 u_char sc_control; 214 char sc_flags; 215#define LP_POS_INIT 0x04 /* if we are a postive init signal */ 216#define LP_POS_ACK 0x08 /* if we are a positive going ack */ 217#define LP_NO_PRIME 0x10 /* don't prime the printer at all */ 218#define LP_PRIMEOPEN 0x20 /* prime on every open */ 219#define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */ 220#define LP_BYPASS 0x80 /* bypass printer ready checks */ 221 struct buf *sc_inbuf; 222 short sc_xfercnt ; 223 char sc_primed; 224 char *sc_cp ; 225 u_char sc_irq ; /* IRQ status of port */ 226#define LP_HAS_IRQ 0x01 /* we have an irq available */ 227#define LP_USE_IRQ 0x02 /* we are using our irq */ 228#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */ 229 u_char sc_backoff ; /* time to call lptout() again */ 230 231#ifdef INET 232 struct ifnet sc_if; 233 u_char *sc_ifbuf; 234 int sc_iferrs; 235#endif 236} lpt_sc[NOLPT] ; 237 238/* bits for state */ 239#define OPEN (1<<0) /* device is open */ 240#define ASLP (1<<1) /* awaiting draining of printer */ 241#define ERROR (1<<2) /* error was received from printer */ 242#define OBUSY (1<<3) /* printer is busy doing output */ 243#define LPTOUT (1<<4) /* timeout while not selected */ 244#define TOUT (1<<5) /* timeout while not selected */ 245#define INIT (1<<6) /* waiting to initialize for open */ 246#define INTERRUPTED (1<<7) /* write call was interrupted */ 247 248 249/* status masks to interrogate printer status */ 250#define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */ 251#define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR) 252 253/* Printer Ready condition - from lpa.c */ 254/* Only used in polling code */ 255#ifdef PC98 256#define NOT_READY(x) ((inb(x) & LPS_NBSY) != LPS_NBSY) 257#else /* IBM-PC */ 258#define LPS_INVERT (LPS_NBSY | LPS_NACK | LPS_SEL | LPS_NERR) 259#define LPS_MASK (LPS_NBSY | LPS_NACK | LPS_OUT | LPS_SEL | LPS_NERR) 260#define NOT_READY(x) ((inb(x)^LPS_INVERT)&LPS_MASK) 261#endif 262 263#define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */ 264#define MAX_SPIN 20 /* Max delay for device ready in usecs */ 265 266static timeout_t lptout; 267static int lptprobe (struct isa_device *dvp); 268static int lptattach (struct isa_device *isdp); 269static ointhand2_t lptintr; 270 271#ifdef INET 272 273/* Tables for the lp# interface */ 274static u_char *txmith; 275#define txmitl (txmith+(1*LPIPTBLSIZE)) 276#define trecvh (txmith+(2*LPIPTBLSIZE)) 277#define trecvl (txmith+(3*LPIPTBLSIZE)) 278 279static u_char *ctxmith; 280#define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 281#define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 282#define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 283 284/* Functions for the lp# interface */ 285static void lpattach(struct lpt_softc *,int); 286#ifndef PC98 287static int lpinittables(void); 288#endif 289static int lpioctl(struct ifnet *, u_long, caddr_t); 290static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 291 struct rtentry *); 292static void lpintr(int); 293#endif /* INET */ 294 295struct isa_driver olptdriver = { 296 lptprobe, lptattach, "olpt" 297}; 298 299static d_open_t lptopen; 300static d_close_t lptclose; 301static d_write_t lptwrite; 302static d_ioctl_t lptioctl; 303 304#define CDEV_MAJOR 16 305static struct cdevsw lpt_cdevsw = { 306 /* open */ lptopen, 307 /* close */ lptclose, 308 /* read */ noread, 309 /* write */ lptwrite, 310 /* ioctl */ lptioctl, 311 /* stop */ nostop, 312 /* reset */ noreset, 313 /* devtotty */ nodevtotty, 314 /* poll */ nopoll, 315 /* mmap */ nommap, 316 /* strategy */ nostrategy, 317 /* name */ "lpt", 318 /* parms */ noparms, 319 /* maj */ CDEV_MAJOR, 320 /* dump */ nodump, 321 /* psize */ nopsize, 322 /* flags */ 0, 323 /* maxio */ 0, 324 /* bmaj */ -1 325}; 326 327#ifndef PC98 328/* 329 * Internal routine to lptprobe to do port tests of one byte value 330 */ 331static int 332lpt_port_test (int port, u_char data, u_char mask) 333{ 334 int temp, timeout; 335 336 data = data & mask; 337 outb(port, data); 338 timeout = 10000; 339 do { 340 DELAY(10); 341 temp = inb(port) & mask; 342 } 343 while (temp != data && --timeout); 344 lprintf(("Port 0x%x\tout=%x\tin=%x\ttout=%d\n", 345 port, data, temp, timeout)); 346 return (temp == data); 347} 348#endif /* PC98 */ 349 350/* 351 * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94 352 * Based partially on Rod Grimes' printer probe 353 * 354 * Logic: 355 * 1) If no port address was given, use the bios detected ports 356 * and autodetect what ports the printers are on. 357 * 2) Otherwise, probe the data port at the address given, 358 * using the method in Rod Grimes' port probe. 359 * (Much code ripped off directly from Rod's probe.) 360 * 361 * Comments from Rod's probe: 362 * Logic: 363 * 1) You should be able to write to and read back the same value 364 * to the data port. Do an alternating zeros, alternating ones, 365 * walking zero, and walking one test to check for stuck bits. 366 * 367 * 2) You should be able to write to and read back the same value 368 * to the control port lower 5 bits, the upper 3 bits are reserved 369 * per the IBM PC technical reference manauls and different boards 370 * do different things with them. Do an alternating zeros, alternating 371 * ones, walking zero, and walking one test to check for stuck bits. 372 * 373 * Some printers drag the strobe line down when the are powered off 374 * so this bit has been masked out of the control port test. 375 * 376 * XXX Some printers may not like a fast pulse on init or strobe, I 377 * don't know at this point, if that becomes a problem these bits 378 * should be turned off in the mask byte for the control port test. 379 * 380 * We are finally left with a mask of 0x14, due to some printers 381 * being adamant about holding other bits high ........ 382 * 383 * Before probing the control port, we write a 0 to the data port - 384 * If not, some printers chuck out garbage when the strobe line 385 * gets toggled. 386 * 387 * 3) Set the data and control ports to a value of 0 388 * 389 * This probe routine has been tested on Epson Lx-800, HP LJ3P, 390 * Epson FX-1170 and C.Itoh 8510RM 391 * printers. 392 * Quick exit on fail added. 393 */ 394 395int 396lptprobe(struct isa_device *dvp) 397{ 398#ifdef PC98 399#define PC98_OLD_LPT 0x40 400#define PC98_IEEE_1284_FUNCTION 0x149 401 unsigned int pc98_ieee_mode, tmp; 402 403 if (dvp->id_iobase == PC98_OLD_LPT) { 404 tmp = inb(PC98_IEEE_1284_FUNCTION); 405 pc98_ieee_mode = tmp; 406 if ((tmp & 0x10) == 0x10) { 407 outb(PC98_IEEE_1284_FUNCTION, tmp & ~0x10); 408 tmp = inb(PC98_IEEE_1284_FUNCTION); 409 if ((tmp & 0x10) != 0x10) { 410 outb(PC98_IEEE_1284_FUNCTION, pc98_ieee_mode); 411 return 0; 412 } 413 } 414 } 415 return 8; 416#else 417 int port; 418 static short next_bios_lpt = 0; 419 int status; 420 static u_char testbyte[18] = { 421 0x55, /* alternating zeros */ 422 0xaa, /* alternating ones */ 423 0xfe, 0xfd, 0xfb, 0xf7, 424 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */ 425 0x01, 0x02, 0x04, 0x08, 426 0x10, 0x20, 0x40, 0x80 /* walking one */ 427 }; 428 int i; 429 430 /* 431 * Make sure there is some way for lptopen to see that 432 * the port is not configured 433 * This 0 will remain if the port isn't attached 434 */ 435 (lpt_sc + dvp->id_unit)->sc_port = 0; 436 437 status = IO_LPTSIZE; 438 /* If port not specified, use bios list */ 439 if(dvp->id_iobase < 0) { /* port? */ 440 if((next_bios_lpt < BIOS_MAX_LPT) && 441 (*(BIOS_PORTS+next_bios_lpt) != 0) ) { 442 dvp->id_iobase = *(BIOS_PORTS+next_bios_lpt++); 443 goto end_probe; 444 } else 445 return (0); 446 } 447 448 /* Port was explicitly specified */ 449 /* This allows probing of ports unknown to the BIOS */ 450 port = dvp->id_iobase + lpt_data; 451 for (i = 0; i < 18; i++) { 452 if (!lpt_port_test(port, testbyte[i], 0xff)) { 453 status = 0; 454 goto end_probe; 455 } 456 } 457 458end_probe: 459 /* write 0's to control and data ports */ 460 outb(dvp->id_iobase+lpt_data, 0); 461 outb(dvp->id_iobase+lpt_control, 0); 462 463 return (status); 464#endif 465} 466 467/* XXX Todo - try and detect if interrupt is working */ 468int 469lptattach(struct isa_device *isdp) 470{ 471 struct lpt_softc *sc; 472 int unit; 473 474 isdp->id_ointr = lptintr; 475 unit = isdp->id_unit; 476 sc = lpt_sc + unit; 477 sc->sc_port = isdp->id_iobase; 478 sc->sc_primed = 0; /* not primed yet */ 479#ifdef PC98 480 outb(sc->sc_port+lpt_pstb_ctrl, LPC_DIS_PSTB); /* PSTB disable */ 481 outb(sc->sc_port+lpt_control, LPC_MODE8255); /* 8255 mode set */ 482 outb(sc->sc_port+lpt_control, LPC_NIRQ8); /* IRQ8 inactive */ 483 outb(sc->sc_port+lpt_control, LPC_NPSTB); /* PSTB inactive */ 484 outb(sc->sc_port+lpt_pstb_ctrl, LPC_EN_PSTB); /* PSTB enable */ 485#else 486 outb(sc->sc_port+lpt_control, LPC_NINIT); 487#endif 488 489 /* check if we can use interrupt */ 490 lprintf(("oldirq %x\n", sc->sc_irq)); 491 if (isdp->id_irq) { 492 sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ; 493 printf("lpt%d: Interrupt-driven port\n", unit); 494#ifdef INET 495 lpattach(sc, unit); 496#endif 497 } else { 498 sc->sc_irq = 0; 499 lprintf(("lpt%d: Polled port\n", unit)); 500 } 501 lprintf(("irq %x\n", sc->sc_irq)); 502 503 /* XXX what to do about the flags in the minor number? */ 504 make_dev(&lpt_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit); 505 make_dev(&lpt_cdevsw, unit | LP_BYPASS, 506 UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit); 507 return (1); 508} 509 510/* 511 * lptopen -- reset the printer, then wait until it's selected and not busy. 512 * If LP_BYPASS flag is selected, then we do not try to select the 513 * printer -- this is just used for passing ioctls. 514 */ 515 516static int 517lptopen (dev_t dev, int flags, int fmt, struct proc *p) 518{ 519 struct lpt_softc *sc; 520 int s; 521#ifdef PC98 522 int port; 523#else 524 int trys, port; 525#endif 526 u_int unit = LPTUNIT(minor(dev)); 527 528 sc = lpt_sc + unit; 529 if ((unit >= NOLPT) || (sc->sc_port == 0)) 530 return (ENXIO); 531 532#ifdef INET 533 if (sc->sc_if.if_flags & IFF_UP) 534 return(EBUSY); 535#endif 536 537 if (sc->sc_state) { 538 lprintf(("lp: still open %x\n", sc->sc_state)); 539 return(EBUSY); 540 } else 541 sc->sc_state |= INIT; 542 543 sc->sc_flags = LPTFLAGS(minor(dev)); 544 545 /* Check for open with BYPASS flag set. */ 546 if (sc->sc_flags & LP_BYPASS) { 547 sc->sc_state = OPEN; 548 return(0); 549 } 550 551 s = spltty(); 552 lprintf(("lp flags 0x%x\n", sc->sc_flags)); 553 port = sc->sc_port; 554 555 /* set IRQ status according to ENABLE_IRQ flag */ 556 if (sc->sc_irq & LP_ENABLE_IRQ) 557 sc->sc_irq |= LP_USE_IRQ; 558 else 559 sc->sc_irq &= ~LP_USE_IRQ; 560 561 /* init printer */ 562#ifndef PC98 563 if ((sc->sc_flags & LP_NO_PRIME) == 0) { 564 if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) { 565 outb(port+lpt_control, 0); 566 sc->sc_primed++; 567 DELAY(500); 568 } 569 } 570 571 outb (port+lpt_control, LPC_SEL|LPC_NINIT); 572 573 /* wait till ready (printer running diagnostics) */ 574 trys = 0; 575 do { 576 /* ran out of waiting for the printer */ 577 if (trys++ >= LPINITRDY*4) { 578 splx(s); 579 sc->sc_state = 0; 580 lprintf(("status %x\n", inb(port+lpt_status))); 581 return (EBUSY); 582 } 583 584 /* wait 1/4 second, give up if we get a signal */ 585 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, "lptinit", hz/4) != 586 EWOULDBLOCK) { 587 sc->sc_state = 0; 588 splx(s); 589 return (EBUSY); 590 } 591 592 /* is printer online and ready for output */ 593 } while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 594 (LPS_SEL|LPS_NBSY|LPS_NERR)); 595 596 sc->sc_control = LPC_SEL|LPC_NINIT; 597 if (sc->sc_flags & LP_AUTOLF) 598 sc->sc_control |= LPC_AUTOL; 599 600 /* enable interrupt if interrupt-driven */ 601 if (sc->sc_irq & LP_USE_IRQ) 602 sc->sc_control |= LPC_ENA; 603 604 outb(port+lpt_control, sc->sc_control); 605#endif 606 607 sc->sc_state = OPEN; 608 sc->sc_inbuf = geteblk(BUFSIZE); 609 sc->sc_xfercnt = 0; 610 splx(s); 611 612 /* only use timeout if using interrupt */ 613 lprintf(("irq %x\n", sc->sc_irq)); 614 if (sc->sc_irq & LP_USE_IRQ) { 615 sc->sc_state |= TOUT; 616 timeout (lptout, (caddr_t)sc, 617 (sc->sc_backoff = hz/LPTOUTINITIAL)); 618 } 619 620 lprintf(("opened.\n")); 621 return(0); 622} 623 624static void 625lptout (void *arg) 626{ 627 struct lpt_softc *sc = arg; 628 int pl; 629 630 lprintf(("T %x ", inb(sc->sc_port+lpt_status))); 631 if (sc->sc_state & OPEN) { 632 sc->sc_backoff++; 633 if (sc->sc_backoff > hz/LPTOUTMAX) 634 sc->sc_backoff = sc->sc_backoff > hz/LPTOUTMAX; 635 timeout (lptout, (caddr_t)sc, sc->sc_backoff); 636 } else 637 sc->sc_state &= ~TOUT; 638 639 if (sc->sc_state & ERROR) 640 sc->sc_state &= ~ERROR; 641 642 /* 643 * Avoid possible hangs do to missed interrupts 644 */ 645 if (sc->sc_xfercnt) { 646 pl = spltty(); 647 lptintr(sc - lpt_sc); 648 splx(pl); 649 } else { 650 sc->sc_state &= ~OBUSY; 651 wakeup((caddr_t)sc); 652 } 653} 654 655/* 656 * lptclose -- close the device, free the local line buffer. 657 * 658 * Check for interrupted write call added. 659 */ 660 661static int 662lptclose(dev_t dev, int flags, int fmt, struct proc *p) 663{ 664 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 665#ifndef PC98 666 int port = sc->sc_port; 667#endif 668 669 if(sc->sc_flags & LP_BYPASS) 670 goto end_close; 671 672 sc->sc_state &= ~OPEN; 673 674#ifndef PC98 675 /* if the last write was interrupted, don't complete it */ 676 if((!(sc->sc_state & INTERRUPTED)) && (sc->sc_irq & LP_USE_IRQ)) 677 while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 678 (LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt) 679 /* wait 1/4 second, give up if we get a signal */ 680 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, 681 "lpclose", hz) != EWOULDBLOCK) 682 break; 683 684 outb(sc->sc_port+lpt_control, LPC_NINIT); 685#endif 686 brelse(sc->sc_inbuf); 687 688end_close: 689 sc->sc_state = 0; 690 sc->sc_xfercnt = 0; 691 lprintf(("closed.\n")); 692 return(0); 693} 694 695/* 696 * pushbytes() 697 * Workhorse for actually spinning and writing bytes to printer 698 * Derived from lpa.c 699 * Originally by ? 700 * 701 * This code is only used when we are polling the port 702 */ 703static int 704pushbytes(struct lpt_softc * sc) 705{ 706 int spin, err, tic; 707 char ch; 708 int port = sc->sc_port; 709 710 lprintf(("p")); 711 /* loop for every character .. */ 712 while (sc->sc_xfercnt > 0) { 713 /* printer data */ 714 ch = *(sc->sc_cp); 715 sc->sc_cp++; 716 sc->sc_xfercnt--; 717 718 /* 719 * Wait for printer ready. 720 * Loop 20 usecs testing BUSY bit, then sleep 721 * for exponentially increasing timeout. (vak) 722 */ 723 for (spin=0; NOT_READY(port+lpt_status) && spin<MAX_SPIN; ++spin) 724 DELAY(1); /* XXX delay is NOT this accurate! */ 725 if (spin >= MAX_SPIN) { 726 tic = 0; 727 while (NOT_READY(port+lpt_status)) { 728 /* 729 * Now sleep, every cycle a 730 * little longer .. 731 */ 732 tic = tic + tic + 1; 733 /* 734 * But no more than 10 seconds. (vak) 735 */ 736 if (tic > MAX_SLEEP) 737 tic = MAX_SLEEP; 738 err = tsleep((caddr_t)sc, LPPRI, 739 "lptpoll", tic); 740 if (err != EWOULDBLOCK) { 741 return (err); 742 } 743 } 744 } 745 746 /* output data */ 747 outb(port+lpt_data, ch); 748#ifdef PC98 749 DELAY(1); 750 outb(port+lpt_control, LPC_PSTB); 751 DELAY(1); 752 outb(port+lpt_control, LPC_NPSTB); 753#else 754 /* strobe */ 755 outb(port+lpt_control, sc->sc_control|LPC_STB); 756 outb(port+lpt_control, sc->sc_control); 757#endif 758 759 } 760 return(0); 761} 762 763/* 764 * lptwrite --copy a line from user space to a local buffer, then call 765 * putc to get the chars moved to the output queue. 766 * 767 * Flagging of interrupted write added. 768 */ 769 770static int 771lptwrite(dev_t dev, struct uio * uio, int ioflag) 772{ 773 register unsigned n; 774 int pl, err; 775 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 776 777 if(sc->sc_flags & LP_BYPASS) { 778 /* we can't do writes in bypass mode */ 779 return(EPERM); 780 } 781 782 sc->sc_state &= ~INTERRUPTED; 783 while ((n = min(BUFSIZE, uio->uio_resid)) != 0) { 784 sc->sc_cp = sc->sc_inbuf->b_data ; 785 uiomove(sc->sc_cp, n, uio); 786 sc->sc_xfercnt = n ; 787 while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) { 788 lprintf(("i")); 789 /* if the printer is ready for a char, */ 790 /* give it one */ 791 if ((sc->sc_state & OBUSY) == 0){ 792 lprintf(("\nC %d. ", sc->sc_xfercnt)); 793 pl = spltty(); 794 lptintr(sc - lpt_sc); 795 (void) splx(pl); 796 } 797 lprintf(("W ")); 798 if (sc->sc_state & OBUSY) 799 if ((err = tsleep ((caddr_t)sc, 800 LPPRI|PCATCH, "lpwrite", 0))) { 801 sc->sc_state |= INTERRUPTED; 802 return(err); 803 } 804 } 805 /* check to see if we must do a polled write */ 806 if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) { 807 lprintf(("p")); 808 if((err = pushbytes(sc))) 809 return(err); 810 } 811 } 812 return(0); 813} 814 815/* 816 * lptintr -- handle printer interrupts which occur when the printer is 817 * ready to accept another char. 818 * 819 * do checking for interrupted write call. 820 */ 821 822static void 823lptintr(int unit) 824{ 825 struct lpt_softc *sc = lpt_sc + unit; 826#ifndef PC98 827 int port = sc->sc_port, sts; 828 int i; 829#endif 830 831#ifdef INET 832 if(sc->sc_if.if_flags & IFF_UP) { 833 lpintr(unit); 834 return; 835 } 836#endif /* INET */ 837 838#ifndef PC98 839 /* 840 * Is printer online and ready for output? 841 * 842 * Avoid falling back to lptout() too quickly. First spin-loop 843 * to see if the printer will become ready ``really soon now''. 844 */ 845 for (i = 0; 846 i < 100 && 847 ((sts=inb(port+lpt_status)) & RDY_MASK) != LP_READY; 848 i++) ; 849 if ((sts & RDY_MASK) == LP_READY) { 850 sc->sc_state = (sc->sc_state | OBUSY) & ~ERROR; 851 sc->sc_backoff = hz/LPTOUTINITIAL; 852 853 if (sc->sc_xfercnt) { 854 /* send char */ 855 /*lprintf(("%x ", *sc->sc_cp)); */ 856 outb(port+lpt_data, *sc->sc_cp++) ; 857 outb(port+lpt_control, sc->sc_control|LPC_STB); 858 /* DELAY(X) */ 859 outb(port+lpt_control, sc->sc_control); 860 861 /* any more data for printer */ 862 if(--(sc->sc_xfercnt) > 0) return; 863 } 864 865 /* 866 * No more data waiting for printer. 867 * Wakeup is not done if write call was interrupted. 868 */ 869 sc->sc_state &= ~OBUSY; 870 if(!(sc->sc_state & INTERRUPTED)) 871 wakeup((caddr_t)sc); 872 lprintf(("w ")); 873 return; 874 } else { /* check for error */ 875 if(((sts & (LPS_NERR | LPS_OUT) ) != LPS_NERR) && 876 (sc->sc_state & OPEN)) 877 sc->sc_state |= ERROR; 878 /* lptout() will jump in and try to restart. */ 879 } 880#endif 881 lprintf(("sts %x ", sts)); 882} 883 884static int 885lptioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p) 886{ 887 int error = 0; 888 struct lpt_softc *sc; 889 u_int unit = LPTUNIT(minor(dev)); 890 u_char old_sc_irq; /* old printer IRQ status */ 891 892 sc = lpt_sc + unit; 893 894 switch (cmd) { 895 case LPT_IRQ : 896 if(sc->sc_irq & LP_HAS_IRQ) { 897 /* 898 * NOTE: 899 * If the IRQ status is changed, 900 * this will only be visible on the 901 * next open. 902 * 903 * If interrupt status changes, 904 * this gets syslog'd. 905 */ 906 old_sc_irq = sc->sc_irq; 907 if(*(int*)data == 0) 908 sc->sc_irq &= (~LP_ENABLE_IRQ); 909 else 910 sc->sc_irq |= LP_ENABLE_IRQ; 911 if (old_sc_irq != sc->sc_irq ) 912 log(LOG_NOTICE, "lpt%c switched to %s mode\n", 913 (char)unit+'0', 914 (sc->sc_irq & LP_ENABLE_IRQ)? 915 "interrupt-driven":"polled"); 916 } else /* polled port */ 917 error = EOPNOTSUPP; 918 break; 919 default: 920 error = ENODEV; 921 } 922 923 return(error); 924} 925 926#ifdef INET 927 928static void 929lpattach (struct lpt_softc *sc, int unit) 930{ 931 struct ifnet *ifp = &sc->sc_if; 932 933 ifp->if_softc = sc; 934 ifp->if_name = "lp"; 935 ifp->if_unit = unit; 936 ifp->if_mtu = LPMTU; 937 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 938 ifp->if_ioctl = lpioctl; 939 ifp->if_output = lpoutput; 940 ifp->if_type = IFT_PARA; 941 ifp->if_hdrlen = 0; 942 ifp->if_addrlen = 0; 943 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 944 if_attach(ifp); 945 printf("lp%d: TCP/IP capable interface\n", unit); 946 947#if NBPF > 0 948 bpfattach(ifp, DLT_NULL, LPIPHDRLEN); 949#endif 950} 951 952#ifndef PC98 953/* 954 * Build the translation tables for the LPIP (BSD unix) protocol. 955 * We don't want to calculate these nasties in our tight loop, so we 956 * precalculate them when we initialize. 957 */ 958static int 959lpinittables (void) 960{ 961 int i; 962 963 if (!txmith) 964 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 965 966 if (!txmith) 967 return 1; 968 969 if (!ctxmith) 970 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 971 972 if (!ctxmith) 973 return 1; 974 975 for (i=0; i < LPIPTBLSIZE; i++) { 976 ctxmith[i] = (i & 0xF0) >> 4; 977 ctxmitl[i] = 0x10 | (i & 0x0F); 978 ctrecvh[i] = (i & 0x78) << 1; 979 ctrecvl[i] = (i & 0x78) >> 3; 980 } 981 982 for (i=0; i < LPIPTBLSIZE; i++) { 983 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 984 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 985 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 986 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 987 } 988 989 return 0; 990} 991#endif /* PC98 */ 992 993/* 994 * Process an ioctl request. 995 */ 996 997static int 998lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data) 999{ 1000 struct lpt_softc *sc = lpt_sc + ifp->if_unit; 1001 struct ifaddr *ifa = (struct ifaddr *)data; 1002 struct ifreq *ifr = (struct ifreq *)data; 1003 u_char *ptr; 1004 1005 switch (cmd) { 1006 1007 case SIOCSIFDSTADDR: 1008 case SIOCAIFADDR: 1009 case SIOCSIFADDR: 1010 if (ifa->ifa_addr->sa_family != AF_INET) 1011 return EAFNOSUPPORT; 1012 ifp->if_flags |= IFF_UP; 1013 /* FALLTHROUGH */ 1014 case SIOCSIFFLAGS: 1015 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 1016 outb(sc->sc_port + lpt_control, 0x00); 1017 ifp->if_flags &= ~IFF_RUNNING; 1018 break; 1019 } 1020#ifdef PC98 1021 /* XXX */ 1022 return ENOBUFS; 1023#else 1024 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 1025 if (lpinittables()) 1026 return ENOBUFS; 1027 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 1028 M_DEVBUF, M_WAITOK); 1029 if (!sc->sc_ifbuf) 1030 return ENOBUFS; 1031 1032 outb(sc->sc_port + lpt_control, LPC_ENA); 1033 ifp->if_flags |= IFF_RUNNING; 1034 } 1035 break; 1036#endif 1037 case SIOCSIFMTU: 1038 ptr = sc->sc_ifbuf; 1039 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 1040 if (!sc->sc_ifbuf) { 1041 sc->sc_ifbuf = ptr; 1042 return ENOBUFS; 1043 } 1044 if (ptr) 1045 free(ptr,M_DEVBUF); 1046 sc->sc_if.if_mtu = ifr->ifr_mtu; 1047 break; 1048 1049 case SIOCGIFMTU: 1050 ifr->ifr_mtu = sc->sc_if.if_mtu; 1051 break; 1052 1053 case SIOCADDMULTI: 1054 case SIOCDELMULTI: 1055 if (ifr == 0) { 1056 return EAFNOSUPPORT; /* XXX */ 1057 } 1058 switch (ifr->ifr_addr.sa_family) { 1059 1060#ifdef INET 1061 case AF_INET: 1062 break; 1063#endif 1064 1065 default: 1066 return EAFNOSUPPORT; 1067 } 1068 break; 1069 1070 default: 1071 lprintf(("LP:ioctl(0x%lx)\n", cmd)); 1072 return EINVAL; 1073 } 1074 return 0; 1075} 1076 1077static __inline int 1078clpoutbyte (u_char byte, int spin, int data_port, int status_port) 1079{ 1080 outb(data_port, ctxmitl[byte]); 1081 while (inb(status_port) & CLPIP_SHAKE) 1082 if (--spin == 0) { 1083 return 1; 1084 } 1085 outb(data_port, ctxmith[byte]); 1086 while (!(inb(status_port) & CLPIP_SHAKE)) 1087 if (--spin == 0) { 1088 return 1; 1089 } 1090 return 0; 1091} 1092 1093static __inline int 1094clpinbyte (int spin, int data_port, int status_port) 1095{ 1096 int c, cl; 1097 1098 while((inb(status_port) & CLPIP_SHAKE)) 1099 if(!--spin) { 1100 return -1; 1101 } 1102 cl = inb(status_port); 1103 outb(data_port, 0x10); 1104 1105 while(!(inb(status_port) & CLPIP_SHAKE)) 1106 if(!--spin) { 1107 return -1; 1108 } 1109 c = inb(status_port); 1110 outb(data_port, 0x00); 1111 1112 return (ctrecvl[cl] | ctrecvh[c]); 1113} 1114 1115static void 1116lpintr (int unit) 1117{ 1118 struct lpt_softc *sc = lpt_sc + unit; 1119 register int lpt_data_port = sc->sc_port + lpt_data; 1120 register int lpt_stat_port = sc->sc_port + lpt_status; 1121 int lpt_ctrl_port = sc->sc_port + lpt_control; 1122 int len, s, j; 1123 u_char *bp; 1124 u_char c, cl; 1125 struct mbuf *top; 1126 1127 s = splhigh(); 1128 1129 if (sc->sc_if.if_flags & IFF_LINK0) { 1130 1131 /* Ack. the request */ 1132 outb(lpt_data_port, 0x01); 1133 1134 /* Get the packet length */ 1135 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1136 if (j == -1) 1137 goto err; 1138 len = j; 1139 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1140 if (j == -1) 1141 goto err; 1142 len = len + (j << 8); 1143 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 1144 goto err; 1145 1146 bp = sc->sc_ifbuf; 1147 1148 while (len--) { 1149 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1150 if (j == -1) { 1151 goto err; 1152 } 1153 *bp++ = j; 1154 } 1155 /* Get and ignore checksum */ 1156 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1157 if (j == -1) { 1158 goto err; 1159 } 1160 1161 len = bp - sc->sc_ifbuf; 1162 if (len <= CLPIPHDRLEN) 1163 goto err; 1164 1165 sc->sc_iferrs = 0; 1166 1167 if (IF_QFULL(&ipintrq)) { 1168 lprintf(("DROP")); 1169 IF_DROP(&ipintrq); 1170 goto done; 1171 } 1172 len -= CLPIPHDRLEN; 1173 sc->sc_if.if_ipackets++; 1174 sc->sc_if.if_ibytes += len; 1175 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 1176 if (top) { 1177 IF_ENQUEUE(&ipintrq, top); 1178 schednetisr(NETISR_IP); 1179 } 1180 goto done; 1181 } 1182 while ((inb(lpt_stat_port) & LPIP_SHAKE)) { 1183 len = sc->sc_if.if_mtu + LPIPHDRLEN; 1184 bp = sc->sc_ifbuf; 1185 while (len--) { 1186 1187 cl = inb(lpt_stat_port); 1188 outb(lpt_data_port, 8); 1189 1190 j = LPMAXSPIN2; 1191 while((inb(lpt_stat_port) & LPIP_SHAKE)) 1192 if(!--j) goto err; 1193 1194 c = inb(lpt_stat_port); 1195 outb(lpt_data_port, 0); 1196 1197 *bp++= trecvh[cl] | trecvl[c]; 1198 1199 j = LPMAXSPIN2; 1200 while (!((cl=inb(lpt_stat_port)) & LPIP_SHAKE)) { 1201 if (cl != c && 1202 (((cl = inb(lpt_stat_port)) ^ 0xb8) & 0xf8) == 1203 (c & 0xf8)) 1204 goto end; 1205 if (!--j) goto err; 1206 } 1207 } 1208 1209 end: 1210 len = bp - sc->sc_ifbuf; 1211 if (len <= LPIPHDRLEN) 1212 goto err; 1213 1214 sc->sc_iferrs = 0; 1215 1216 if (IF_QFULL(&ipintrq)) { 1217 lprintf(("DROP")); 1218 IF_DROP(&ipintrq); 1219 goto done; 1220 } 1221#if NBPF > 0 1222 if (sc->sc_if.if_bpf) { 1223 bpf_tap(&sc->sc_if, sc->sc_ifbuf, len); 1224 } 1225#endif 1226 len -= LPIPHDRLEN; 1227 sc->sc_if.if_ipackets++; 1228 sc->sc_if.if_ibytes += len; 1229 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 1230 if (top) { 1231 IF_ENQUEUE(&ipintrq, top); 1232 schednetisr(NETISR_IP); 1233 } 1234 } 1235 goto done; 1236 1237 err: 1238 outb(lpt_data_port, 0); 1239 lprintf(("R")); 1240 sc->sc_if.if_ierrors++; 1241 sc->sc_iferrs++; 1242 1243 /* 1244 * We are not able to send receive anything for now, 1245 * so stop wasting our time 1246 */ 1247 if (sc->sc_iferrs > LPMAXERRS) { 1248 printf("lp%d: Too many errors, Going off-line.\n", unit); 1249 outb(lpt_ctrl_port, 0x00); 1250 sc->sc_if.if_flags &= ~IFF_RUNNING; 1251 sc->sc_iferrs=0; 1252 } 1253 1254 done: 1255 splx(s); 1256 return; 1257} 1258 1259static __inline int 1260lpoutbyte (u_char byte, int spin, int data_port, int status_port) 1261{ 1262 outb(data_port, txmith[byte]); 1263 while (!(inb(status_port) & LPIP_SHAKE)) 1264 if (--spin == 0) 1265 return 1; 1266 outb(data_port, txmitl[byte]); 1267 while (inb(status_port) & LPIP_SHAKE) 1268 if (--spin == 0) 1269 return 1; 1270 return 0; 1271} 1272 1273static int 1274lpoutput (struct ifnet *ifp, struct mbuf *m, 1275 struct sockaddr *dst, struct rtentry *rt) 1276{ 1277 register int lpt_data_port = lpt_sc[ifp->if_unit].sc_port + lpt_data; 1278 register int lpt_stat_port = lpt_sc[ifp->if_unit].sc_port + lpt_status; 1279#ifndef PC98 1280 int lpt_ctrl_port = lpt_sc[ifp->if_unit].sc_port + lpt_control; 1281#endif 1282 1283 int s, err; 1284 struct mbuf *mm; 1285 u_char *cp = "\0\0"; 1286 u_char chksum = 0; 1287 int count = 0; 1288 int i; 1289 int spin; 1290 1291 /* We need a sensible value if we abort */ 1292 cp++; 1293 ifp->if_flags |= IFF_RUNNING; 1294 1295 err = 1; /* assume we're aborting because of an error */ 1296 1297 s = splhigh(); 1298 1299#ifndef PC98 1300 /* Suspend (on laptops) or receive-errors might have taken us offline */ 1301 outb(lpt_ctrl_port, LPC_ENA); 1302#endif 1303 1304 if (ifp->if_flags & IFF_LINK0) { 1305 1306 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1307 lprintf(("&")); 1308 lptintr(ifp->if_unit); 1309 } 1310 1311 /* Alert other end to pending packet */ 1312 spin = LPMAXSPIN1; 1313 outb(lpt_data_port, 0x08); 1314 while ((inb(lpt_stat_port) & 0x08) == 0) 1315 if (--spin == 0) { 1316 goto nend; 1317 } 1318 1319 /* Calculate length of packet, then send that */ 1320 1321 count += 14; /* Ethernet header len */ 1322 1323 mm = m; 1324 for (mm = m; mm; mm = mm->m_next) { 1325 count += mm->m_len; 1326 } 1327 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1328 goto nend; 1329 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1330 goto nend; 1331 1332 /* Send dummy ethernet header */ 1333 for (i = 0; i < 12; i++) { 1334 if (clpoutbyte(i, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1335 goto nend; 1336 chksum += i; 1337 } 1338 1339 if (clpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1340 goto nend; 1341 if (clpoutbyte(0x00, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1342 goto nend; 1343 chksum += 0x08 + 0x00; /* Add into checksum */ 1344 1345 mm = m; 1346 do { 1347 cp = mtod(mm, u_char *); 1348 while (mm->m_len--) { 1349 chksum += *cp; 1350 if (clpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1351 goto nend; 1352 } 1353 } while ((mm = mm->m_next)); 1354 1355 /* Send checksum */ 1356 if (clpoutbyte(chksum, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1357 goto nend; 1358 1359 /* Go quiescent */ 1360 outb(lpt_data_port, 0); 1361 1362 err = 0; /* No errors */ 1363 1364 nend: 1365 if (err) { /* if we didn't timeout... */ 1366 ifp->if_oerrors++; 1367 lprintf(("X")); 1368 } else { 1369 ifp->if_opackets++; 1370 ifp->if_obytes += m->m_pkthdr.len; 1371 } 1372 1373 m_freem(m); 1374 1375 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1376 lprintf(("^")); 1377 lptintr(ifp->if_unit); 1378 } 1379 (void) splx(s); 1380 return 0; 1381 } 1382 1383 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1384 lprintf(("&")); 1385 lptintr(ifp->if_unit); 1386 } 1387 1388 if (lpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1389 goto end; 1390 if (lpoutbyte(0x00, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1391 goto end; 1392 1393 mm = m; 1394 do { 1395 cp = mtod(mm,u_char *); 1396 while (mm->m_len--) 1397 if (lpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1398 goto end; 1399 } while ((mm = mm->m_next)); 1400 1401 err = 0; /* no errors were encountered */ 1402 1403 end: 1404 --cp; 1405 outb(lpt_data_port, txmitl[*cp] ^ 0x17); 1406 1407 if (err) { /* if we didn't timeout... */ 1408 ifp->if_oerrors++; 1409 lprintf(("X")); 1410 } else { 1411 ifp->if_opackets++; 1412 ifp->if_obytes += m->m_pkthdr.len; 1413#if NBPF > 0 1414 if (ifp->if_bpf) { 1415 /* 1416 * We need to prepend the packet type as 1417 * a two byte field. Cons up a dummy header 1418 * to pacify bpf. This is safe because bpf 1419 * will only read from the mbuf (i.e., it won't 1420 * try to free it or keep a pointer to it). 1421 */ 1422 struct mbuf m0; 1423 u_short hdr = 0x800; 1424 1425 m0.m_next = m; 1426 m0.m_len = 2; 1427 m0.m_data = (char *)&hdr; 1428 1429 bpf_mtap(ifp, &m0); 1430 } 1431#endif 1432 } 1433 1434 m_freem(m); 1435 1436 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1437 lprintf(("^")); 1438 lptintr(ifp->if_unit); 1439 } 1440 1441 (void) splx(s); 1442 return 0; 1443} 1444 1445#endif /* INET */ 1446 1447static int lpt_devsw_installed; 1448 1449static void lpt_drvinit(void *unused) 1450{ 1451 1452 if( ! lpt_devsw_installed ) { 1453 cdevsw_add(&lpt_cdevsw); 1454 lpt_devsw_installed = 1; 1455 } 1456} 1457 1458SYSINIT(lptdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,lpt_drvinit,NULL) 1459 1460