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sys/i386/isa/lpt.c
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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: src/sys/i386/isa/lpt.c,v 1.55.2.4 1999/09/05 08:13:10 peter Exp $ 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 "lpt.h" 105 106 #include <sys/param.h> 107 #include <sys/systm.h> 108 #include <sys/conf.h> 109 #include <sys/proc.h> 110 #include <sys/buf.h> 111 #include <sys/kernel.h> 112 #include <sys/ioctl.h> 113 #include <sys/uio.h> 114 #include <sys/syslog.h> 115 #ifdef DEVFS 116 #include <sys/devfsext.h> 117 #endif /*DEVFS*/ 118 119 #include <machine/clock.h> 120 #include <machine/lpt.h> 121 122 #include <vm/vm.h> 123 #include <vm/vm_param.h> 124 #include <vm/pmap.h> 125 126 #include <i386/isa/isa.h> 127 #include <i386/isa/isa_device.h> 128 #include <i386/isa/lptreg.h> 129 130 #ifdef INET 131 #include <sys/mbuf.h> 132 #include <sys/socket.h> 133 #include <net/if.h> 134 #include <net/if_types.h> 135 #include <net/netisr.h> 136 #include <net/route.h> 137 #include <netinet/in.h> 138 #include <netinet/in_systm.h> 139 #include <netinet/in_var.h> 140 #include <netinet/ip.h> 141 #include <netinet/if_ether.h> 142 #include "bpfilter.h" 143 #if NBPFILTER > 0 144 #include <net/bpf.h> 145 #include <net/bpfdesc.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 /* BIOS printer list - used by BIOS probe*/ 188 #define BIOS_LPT_PORTS 0x408 189 #define BIOS_PORTS (short *)(KERNBASE+BIOS_LPT_PORTS) 190 #define BIOS_MAX_LPT 4 191 192 193 #ifndef DEBUG 194 #define lprintf (void) 195 #else 196 #define lprintf if (lptflag) printf 197 static int volatile lptflag = 1; 198 #endif 199 200 #define LPTUNIT(s) ((s)&0x03) 201 #define LPTFLAGS(s) ((s)&0xfc) 202 203 static struct lpt_softc { 204 int sc_port; 205 short sc_state; 206 /* default case: negative prime, negative ack, handshake strobe, 207 prime once */ 208 u_char sc_control; 209 char sc_flags; 210 #define LP_POS_INIT 0x04 /* if we are a postive init signal */ 211 #define LP_POS_ACK 0x08 /* if we are a positive going ack */ 212 #define LP_NO_PRIME 0x10 /* don't prime the printer at all */ 213 #define LP_PRIMEOPEN 0x20 /* prime on every open */ 214 #define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */ 215 #define LP_BYPASS 0x80 /* bypass printer ready checks */ 216 struct buf *sc_inbuf; 217 short sc_xfercnt ; 218 char sc_primed; 219 char *sc_cp ; 220 u_char sc_irq ; /* IRQ status of port */ 221 #define LP_HAS_IRQ 0x01 /* we have an irq available */ 222 #define LP_USE_IRQ 0x02 /* we are using our irq */ 223 #define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */ 224 u_char sc_backoff ; /* time to call lptout() again */ 225 226 #ifdef INET 227 struct ifnet sc_if; 228 u_char *sc_ifbuf; 229 int sc_iferrs; 230 #endif 231 #ifdef DEVFS 232 void *devfs_token; 233 void *devfs_token_ctl; 234 #endif 235 } lpt_sc[NLPT] ; 236 237 /* bits for state */ 238 #define OPEN (1<<0) /* device is open */ 239 #define ASLP (1<<1) /* awaiting draining of printer */ 240 #define ERROR (1<<2) /* error was received from printer */ 241 #define OBUSY (1<<3) /* printer is busy doing output */ 242 #define LPTOUT (1<<4) /* timeout while not selected */ 243 #define TOUT (1<<5) /* timeout while not selected */ 244 #define INIT (1<<6) /* waiting to initialize for open */ 245 #define INTERRUPTED (1<<7) /* write call was interrupted */ 246 247 248 /* status masks to interrogate printer status */ 249 #define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */ 250 #define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR) 251 252 /* Printer Ready condition - from lpa.c */ 253 /* Only used in polling code */ 254 #define LPS_INVERT (LPS_NBSY | LPS_NACK | LPS_SEL | LPS_NERR) 255 #define LPS_MASK (LPS_NBSY | LPS_NACK | LPS_OUT | LPS_SEL | LPS_NERR) 256 #define NOT_READY(x) ((inb(x)^LPS_INVERT)&LPS_MASK) 257 258 #define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */ 259 #define MAX_SPIN 20 /* Max delay for device ready in usecs */ 260 261 static void lptout (struct lpt_softc * sc); 262 static int lptprobe (struct isa_device *dvp); 263 static int lptattach (struct isa_device *isdp); 264 265 #ifdef INET 266 267 /* Tables for the lp# interface */ 268 static u_char *txmith; 269 #define txmitl (txmith+(1*LPIPTBLSIZE)) 270 #define trecvh (txmith+(2*LPIPTBLSIZE)) 271 #define trecvl (txmith+(3*LPIPTBLSIZE)) 272 273 static u_char *ctxmith; 274 #define ctxmitl (ctxmith+(1*LPIPTBLSIZE)) 275 #define ctrecvh (ctxmith+(2*LPIPTBLSIZE)) 276 #define ctrecvl (ctxmith+(3*LPIPTBLSIZE)) 277 278 /* Functions for the lp# interface */ 279 static void lpattach(struct lpt_softc *,int); 280 static int lpinittables(void); 281 static int lpioctl(struct ifnet *, int, caddr_t); 282 static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *, 283 struct rtentry *); 284 static void lpintr(int); 285 #endif /* INET */ 286 287 struct isa_driver lptdriver = { 288 lptprobe, lptattach, "lpt" 289 }; 290 291 static d_open_t lptopen; 292 static d_close_t lptclose; 293 static d_write_t lptwrite; 294 static d_ioctl_t lptioctl; 295 296 #define CDEV_MAJOR 16 297 static struct cdevsw lpt_cdevsw = 298 { lptopen, lptclose, noread, lptwrite, /*16*/ 299 lptioctl, nullstop, nullreset, nodevtotty,/* lpt */ 300 seltrue, nommap, nostrat, "lpt", NULL, -1 }; 301 302 303 /* 304 * Internal routine to lptprobe to do port tests of one byte value 305 */ 306 static int 307 lpt_port_test (int port, u_char data, u_char mask) 308 { 309 int temp, timeout; 310 311 data = data & mask; 312 outb(port, data); 313 timeout = 10000; 314 do { 315 DELAY(10); 316 temp = inb(port) & mask; 317 } 318 while (temp != data && --timeout); 319 lprintf("Port 0x%x\tout=%x\tin=%x\ttout=%d\n", 320 port, data, temp, timeout); 321 return (temp == data); 322 } 323 324 /* 325 * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94 326 * Based partially on Rod Grimes' printer probe 327 * 328 * Logic: 329 * 1) If no port address was given, use the bios detected ports 330 * and autodetect what ports the printers are on. 331 * 2) Otherwise, probe the data port at the address given, 332 * using the method in Rod Grimes' port probe. 333 * (Much code ripped off directly from Rod's probe.) 334 * 335 * Comments from Rod's probe: 336 * Logic: 337 * 1) You should be able to write to and read back the same value 338 * to the data port. Do an alternating zeros, alternating ones, 339 * walking zero, and walking one test to check for stuck bits. 340 * 341 * 2) You should be able to write to and read back the same value 342 * to the control port lower 5 bits, the upper 3 bits are reserved 343 * per the IBM PC technical reference manauls and different boards 344 * do different things with them. Do an alternating zeros, alternating 345 * ones, walking zero, and walking one test to check for stuck bits. 346 * 347 * Some printers drag the strobe line down when the are powered off 348 * so this bit has been masked out of the control port test. 349 * 350 * XXX Some printers may not like a fast pulse on init or strobe, I 351 * don't know at this point, if that becomes a problem these bits 352 * should be turned off in the mask byte for the control port test. 353 * 354 * We are finally left with a mask of 0x14, due to some printers 355 * being adamant about holding other bits high ........ 356 * 357 * Before probing the control port, we write a 0 to the data port - 358 * If not, some printers chuck out garbage when the strobe line 359 * gets toggled. 360 * 361 * 3) Set the data and control ports to a value of 0 362 * 363 * This probe routine has been tested on Epson Lx-800, HP LJ3P, 364 * Epson FX-1170 and C.Itoh 8510RM 365 * printers. 366 * Quick exit on fail added. 367 */ 368 int 369 lptprobe(struct isa_device *dvp) 370 { 371 int port; 372 static short next_bios_lpt = 0; 373 int status; 374 static u_char testbyte[18] = { 375 0x55, /* alternating zeros */ 376 0xaa, /* alternating ones */ 377 0xfe, 0xfd, 0xfb, 0xf7, 378 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */ 379 0x01, 0x02, 0x04, 0x08, 380 0x10, 0x20, 0x40, 0x80 /* walking one */ 381 }; 382 int i; 383 384 /* 385 * Make sure there is some way for lptopen to see that 386 * the port is not configured 387 * This 0 will remain if the port isn't attached 388 */ 389 (lpt_sc + dvp->id_unit)->sc_port = 0; 390 391 status = IO_LPTSIZE; 392 /* If port not specified, use bios list */ 393 if(dvp->id_iobase < 0) { /* port? */ 394 if((next_bios_lpt < BIOS_MAX_LPT) && 395 (*(BIOS_PORTS+next_bios_lpt) != 0) ) { 396 dvp->id_iobase = *(BIOS_PORTS+next_bios_lpt++); 397 goto end_probe; 398 } else 399 return (0); 400 } 401 402 /* Port was explicitly specified */ 403 /* This allows probing of ports unknown to the BIOS */ 404 port = dvp->id_iobase + lpt_data; 405 for (i = 0; i < 18; i++) { 406 if (!lpt_port_test(port, testbyte[i], 0xff)) { 407 status = 0; 408 goto end_probe; 409 } 410 } 411 412 end_probe: 413 /* write 0's to control and data ports */ 414 outb(dvp->id_iobase+lpt_data, 0); 415 outb(dvp->id_iobase+lpt_control, 0); 416 417 return (status); 418 } 419 420 /* XXX Todo - try and detect if interrupt is working */ 421 int 422 lptattach(struct isa_device *isdp) 423 { 424 struct lpt_softc *sc; 425 int unit; 426 427 unit = isdp->id_unit; 428 sc = lpt_sc + unit; 429 sc->sc_port = isdp->id_iobase; 430 sc->sc_primed = 0; /* not primed yet */ 431 outb(sc->sc_port+lpt_control, LPC_NINIT); 432 433 /* check if we can use interrupt */ 434 lprintf("oldirq %x\n", sc->sc_irq); 435 if (isdp->id_irq) { 436 sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ; 437 printf("lpt%d: Interrupt-driven port\n", unit); 438 #ifdef INET 439 lpattach(sc, unit); 440 #endif 441 } else { 442 sc->sc_irq = 0; 443 lprintf("lpt%d: Polled port\n", unit); 444 } 445 lprintf("irq %x\n", sc->sc_irq); 446 447 #ifdef DEVFS 448 /* XXX what to do about the flags in the minor number? */ 449 sc->devfs_token = devfs_add_devswf(&lpt_cdevsw, 450 unit, DV_CHR, 451 UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit); 452 sc->devfs_token_ctl = devfs_add_devswf(&lpt_cdevsw, 453 unit | LP_BYPASS, DV_CHR, 454 UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit); 455 #endif 456 return (1); 457 } 458 459 /* 460 * lptopen -- reset the printer, then wait until it's selected and not busy. 461 * If LP_BYPASS flag is selected, then we do not try to select the 462 * printer -- this is just used for passing ioctls. 463 */ 464 465 static int 466 lptopen (dev_t dev, int flags, int fmt, struct proc *p) 467 { 468 struct lpt_softc *sc; 469 int s; 470 int trys, port; 471 u_int unit = LPTUNIT(minor(dev)); 472 473 sc = lpt_sc + unit; 474 if ((unit >= NLPT) || (sc->sc_port == 0)) 475 return (ENXIO); 476 477 #ifdef INET 478 if (sc->sc_if.if_flags & IFF_UP) 479 return(EBUSY); 480 #endif 481 482 if (sc->sc_state) { 483 lprintf("lp: still open %x\n", sc->sc_state); 484 return(EBUSY); 485 } else 486 sc->sc_state |= INIT; 487 488 sc->sc_flags = LPTFLAGS(minor(dev)); 489 490 /* Check for open with BYPASS flag set. */ 491 if (sc->sc_flags & LP_BYPASS) { 492 sc->sc_state = OPEN; 493 return(0); 494 } 495 496 s = spltty(); 497 lprintf("lp flags 0x%x\n", sc->sc_flags); 498 port = sc->sc_port; 499 500 /* set IRQ status according to ENABLE_IRQ flag */ 501 if (sc->sc_irq & LP_ENABLE_IRQ) 502 sc->sc_irq |= LP_USE_IRQ; 503 else 504 sc->sc_irq &= ~LP_USE_IRQ; 505 506 /* init printer */ 507 if ((sc->sc_flags & LP_NO_PRIME) == 0) { 508 if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) { 509 outb(port+lpt_control, 0); 510 sc->sc_primed++; 511 DELAY(500); 512 } 513 } 514 515 outb (port+lpt_control, LPC_SEL|LPC_NINIT); 516 517 /* wait till ready (printer running diagnostics) */ 518 trys = 0; 519 do { 520 /* ran out of waiting for the printer */ 521 if (trys++ >= LPINITRDY*4) { 522 splx(s); 523 sc->sc_state = 0; 524 lprintf ("status %x\n", inb(port+lpt_status) ); 525 return (EBUSY); 526 } 527 528 /* wait 1/4 second, give up if we get a signal */ 529 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, "lptinit", hz/4) != 530 EWOULDBLOCK) { 531 sc->sc_state = 0; 532 splx(s); 533 return (EBUSY); 534 } 535 536 /* is printer online and ready for output */ 537 } while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 538 (LPS_SEL|LPS_NBSY|LPS_NERR)); 539 540 sc->sc_control = LPC_SEL|LPC_NINIT; 541 if (sc->sc_flags & LP_AUTOLF) 542 sc->sc_control |= LPC_AUTOL; 543 544 /* enable interrupt if interrupt-driven */ 545 if (sc->sc_irq & LP_USE_IRQ) 546 sc->sc_control |= LPC_ENA; 547 548 outb(port+lpt_control, sc->sc_control); 549 550 sc->sc_state = OPEN; 551 sc->sc_inbuf = geteblk(BUFSIZE); 552 sc->sc_xfercnt = 0; 553 splx(s); 554 555 /* only use timeout if using interrupt */ 556 lprintf("irq %x\n", sc->sc_irq); 557 if (sc->sc_irq & LP_USE_IRQ) { 558 sc->sc_state |= TOUT; 559 timeout ((timeout_func_t)lptout, (caddr_t)sc, 560 (sc->sc_backoff = hz/LPTOUTINITIAL)); 561 } 562 563 lprintf("opened.\n"); 564 return(0); 565 } 566 567 static void 568 lptout (struct lpt_softc * sc) 569 { int pl; 570 571 lprintf ("T %x ", inb(sc->sc_port+lpt_status)); 572 if (sc->sc_state & OPEN) { 573 sc->sc_backoff++; 574 if (sc->sc_backoff > hz/LPTOUTMAX) 575 sc->sc_backoff = sc->sc_backoff > hz/LPTOUTMAX; 576 timeout ((timeout_func_t)lptout, (caddr_t)sc, sc->sc_backoff); 577 } else 578 sc->sc_state &= ~TOUT; 579 580 if (sc->sc_state & ERROR) 581 sc->sc_state &= ~ERROR; 582 583 /* 584 * Avoid possible hangs do to missed interrupts 585 */ 586 if (sc->sc_xfercnt) { 587 pl = spltty(); 588 lptintr(sc - lpt_sc); 589 splx(pl); 590 } else { 591 sc->sc_state &= ~OBUSY; 592 wakeup((caddr_t)sc); 593 } 594 } 595 596 /* 597 * lptclose -- close the device, free the local line buffer. 598 * 599 * Check for interrupted write call added. 600 */ 601 602 static int 603 lptclose(dev_t dev, int flags, int fmt, struct proc *p) 604 { 605 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 606 int port = sc->sc_port; 607 608 if(sc->sc_flags & LP_BYPASS) 609 goto end_close; 610 611 sc->sc_state &= ~OPEN; 612 613 /* if the last write was interrupted, don't complete it */ 614 if((!(sc->sc_state & INTERRUPTED)) && (sc->sc_irq & LP_USE_IRQ)) 615 while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 616 (LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt) 617 /* wait 1/4 second, give up if we get a signal */ 618 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, 619 "lpclose", hz) != EWOULDBLOCK) 620 break; 621 622 outb(sc->sc_port+lpt_control, LPC_NINIT); 623 brelse(sc->sc_inbuf); 624 625 end_close: 626 sc->sc_state = 0; 627 sc->sc_xfercnt = 0; 628 lprintf("closed.\n"); 629 return(0); 630 } 631 632 /* 633 * pushbytes() 634 * Workhorse for actually spinning and writing bytes to printer 635 * Derived from lpa.c 636 * Originally by ? 637 * 638 * This code is only used when we are polling the port 639 */ 640 static int 641 pushbytes(struct lpt_softc * sc) 642 { 643 int spin, err, tic; 644 char ch; 645 int port = sc->sc_port; 646 647 lprintf("p"); 648 /* loop for every character .. */ 649 while (sc->sc_xfercnt > 0) { 650 /* printer data */ 651 ch = *(sc->sc_cp); 652 sc->sc_cp++; 653 sc->sc_xfercnt--; 654 655 /* 656 * Wait for printer ready. 657 * Loop 20 usecs testing BUSY bit, then sleep 658 * for exponentially increasing timeout. (vak) 659 */ 660 for (spin=0; NOT_READY(port+lpt_status) && spin<MAX_SPIN; ++spin) 661 DELAY(1); /* XXX delay is NOT this accurate! */ 662 if (spin >= MAX_SPIN) { 663 tic = 0; 664 while (NOT_READY(port+lpt_status)) { 665 /* 666 * Now sleep, every cycle a 667 * little longer .. 668 */ 669 tic = tic + tic + 1; 670 /* 671 * But no more than 10 seconds. (vak) 672 */ 673 if (tic > MAX_SLEEP) 674 tic = MAX_SLEEP; 675 err = tsleep((caddr_t)sc, LPPRI, 676 "lptpoll", tic); 677 if (err != EWOULDBLOCK) { 678 return (err); 679 } 680 } 681 } 682 683 /* output data */ 684 outb(port+lpt_data, ch); 685 /* strobe */ 686 outb(port+lpt_control, sc->sc_control|LPC_STB); 687 outb(port+lpt_control, sc->sc_control); 688 689 } 690 return(0); 691 } 692 693 /* 694 * lptwrite --copy a line from user space to a local buffer, then call 695 * putc to get the chars moved to the output queue. 696 * 697 * Flagging of interrupted write added. 698 */ 699 700 static int 701 lptwrite(dev_t dev, struct uio * uio, int ioflag) 702 { 703 register unsigned n; 704 int pl, err; 705 struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev)); 706 707 if(sc->sc_flags & LP_BYPASS) { 708 /* we can't do writes in bypass mode */ 709 return(EPERM); 710 } 711 712 sc->sc_state &= ~INTERRUPTED; 713 while ((n = min(BUFSIZE, uio->uio_resid)) != 0) { 714 sc->sc_cp = sc->sc_inbuf->b_un.b_addr ; 715 uiomove(sc->sc_cp, n, uio); 716 sc->sc_xfercnt = n ; 717 while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) { 718 lprintf("i"); 719 /* if the printer is ready for a char, */ 720 /* give it one */ 721 if ((sc->sc_state & OBUSY) == 0){ 722 lprintf("\nC %d. ", sc->sc_xfercnt); 723 pl = spltty(); 724 lptintr(sc - lpt_sc); 725 (void) splx(pl); 726 } 727 lprintf("W "); 728 if (sc->sc_state & OBUSY) 729 if ((err = tsleep ((caddr_t)sc, 730 LPPRI|PCATCH, "lpwrite", 0))) { 731 sc->sc_state |= INTERRUPTED; 732 return(err); 733 } 734 } 735 /* check to see if we must do a polled write */ 736 if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) { 737 lprintf("p"); 738 if((err = pushbytes(sc))) 739 return(err); 740 } 741 } 742 return(0); 743 } 744 745 /* 746 * lptintr -- handle printer interrupts which occur when the printer is 747 * ready to accept another char. 748 * 749 * do checking for interrupted write call. 750 */ 751 752 void 753 lptintr(int unit) 754 { 755 struct lpt_softc *sc = lpt_sc + unit; 756 int port = sc->sc_port, sts; 757 int i; 758 759 #ifdef INET 760 if(sc->sc_if.if_flags & IFF_UP) { 761 lpintr(unit); 762 return; 763 } 764 #endif /* INET */ 765 766 /* 767 * Is printer online and ready for output? 768 * 769 * Avoid falling back to lptout() too quickly. First spin-loop 770 * to see if the printer will become ready ``really soon now''. 771 */ 772 for (i = 0; 773 i < 100 && 774 ((sts=inb(port+lpt_status)) & RDY_MASK) != LP_READY; 775 i++) ; 776 if ((sts & RDY_MASK) == LP_READY) { 777 sc->sc_state = (sc->sc_state | OBUSY) & ~ERROR; 778 sc->sc_backoff = hz/LPTOUTINITIAL; 779 780 if (sc->sc_xfercnt) { 781 /* send char */ 782 /*lprintf("%x ", *sc->sc_cp); */ 783 outb(port+lpt_data, *sc->sc_cp++) ; 784 outb(port+lpt_control, sc->sc_control|LPC_STB); 785 /* DELAY(X) */ 786 outb(port+lpt_control, sc->sc_control); 787 788 /* any more data for printer */ 789 if(--(sc->sc_xfercnt) > 0) return; 790 } 791 792 /* 793 * No more data waiting for printer. 794 * Wakeup is not done if write call was interrupted. 795 */ 796 sc->sc_state &= ~OBUSY; 797 if(!(sc->sc_state & INTERRUPTED)) 798 wakeup((caddr_t)sc); 799 lprintf("w "); 800 return; 801 } else { /* check for error */ 802 if(((sts & (LPS_NERR | LPS_OUT) ) != LPS_NERR) && 803 (sc->sc_state & OPEN)) 804 sc->sc_state |= ERROR; 805 /* lptout() will jump in and try to restart. */ 806 } 807 lprintf("sts %x ", sts); 808 } 809 810 static int 811 lptioctl(dev_t dev, int cmd, caddr_t data, int flags, struct proc *p) 812 { 813 int error = 0; 814 struct lpt_softc *sc; 815 u_int unit = LPTUNIT(minor(dev)); 816 u_char old_sc_irq; /* old printer IRQ status */ 817 818 sc = lpt_sc + unit; 819 820 switch (cmd) { 821 case LPT_IRQ : 822 if(sc->sc_irq & LP_HAS_IRQ) { 823 /* 824 * NOTE: 825 * If the IRQ status is changed, 826 * this will only be visible on the 827 * next open. 828 * 829 * If interrupt status changes, 830 * this gets syslog'd. 831 */ 832 old_sc_irq = sc->sc_irq; 833 if(*(int*)data == 0) 834 sc->sc_irq &= (~LP_ENABLE_IRQ); 835 else 836 sc->sc_irq |= LP_ENABLE_IRQ; 837 if (old_sc_irq != sc->sc_irq ) 838 log(LOG_NOTICE, "lpt%c switched to %s mode\n", 839 (char)unit+'', 840 (sc->sc_irq & LP_ENABLE_IRQ)? 841 "interrupt-driven":"polled"); 842 } else /* polled port */ 843 error = EOPNOTSUPP; 844 break; 845 default: 846 error = ENODEV; 847 } 848 849 return(error); 850 } 851 852 #ifdef INET 853 854 static void 855 lpattach (struct lpt_softc *sc, int unit) 856 { 857 struct ifnet *ifp = &sc->sc_if; 858 859 ifp->if_softc = sc; 860 ifp->if_name = "lp"; 861 ifp->if_unit = unit; 862 ifp->if_mtu = LPMTU; 863 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST; 864 ifp->if_ioctl = lpioctl; 865 ifp->if_output = lpoutput; 866 ifp->if_type = IFT_PARA; 867 ifp->if_hdrlen = 0; 868 ifp->if_addrlen = 0; 869 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 870 if_attach(ifp); 871 printf("lp%d: TCP/IP capable interface\n", unit); 872 873 #if NBPFILTER > 0 874 bpfattach(ifp, DLT_NULL, LPIPHDRLEN); 875 #endif 876 } 877 /* 878 * Build the translation tables for the LPIP (BSD unix) protocol. 879 * We don't want to calculate these nasties in our tight loop, so we 880 * precalculate them when we initialize. 881 */ 882 static int 883 lpinittables (void) 884 { 885 int i; 886 887 if (!txmith) 888 txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 889 890 if (!txmith) 891 return 1; 892 893 if (!ctxmith) 894 ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT); 895 896 if (!ctxmith) 897 return 1; 898 899 for (i=0; i < LPIPTBLSIZE; i++) { 900 ctxmith[i] = (i & 0xF0) >> 4; 901 ctxmitl[i] = 0x10 | (i & 0x0F); 902 ctrecvh[i] = (i & 0x78) << 1; 903 ctrecvl[i] = (i & 0x78) >> 3; 904 } 905 906 for (i=0; i < LPIPTBLSIZE; i++) { 907 txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08; 908 txmitl[i] = ((i & 0x08) << 1) | (i & 0x07); 909 trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1); 910 trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3); 911 } 912 913 return 0; 914 } 915 916 /* 917 * Process an ioctl request. 918 */ 919 920 static int 921 lpioctl (struct ifnet *ifp, int cmd, caddr_t data) 922 { 923 struct lpt_softc *sc = lpt_sc + ifp->if_unit; 924 struct ifaddr *ifa = (struct ifaddr *)data; 925 struct ifreq *ifr = (struct ifreq *)data; 926 u_char *ptr; 927 928 switch (cmd) { 929 930 case SIOCSIFDSTADDR: 931 case SIOCAIFADDR: 932 case SIOCSIFADDR: 933 if (ifa->ifa_addr->sa_family != AF_INET) 934 return EAFNOSUPPORT; 935 ifp->if_flags |= IFF_UP; 936 /* FALLTHROUGH */ 937 case SIOCSIFFLAGS: 938 if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) { 939 outb(sc->sc_port + lpt_control, 0x00); 940 ifp->if_flags &= ~IFF_RUNNING; 941 break; 942 } 943 if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) { 944 if (lpinittables()) 945 return ENOBUFS; 946 sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN, 947 M_DEVBUF, M_WAITOK); 948 if (!sc->sc_ifbuf) 949 return ENOBUFS; 950 951 outb(sc->sc_port + lpt_control, LPC_ENA); 952 ifp->if_flags |= IFF_RUNNING; 953 } 954 break; 955 956 case SIOCSIFMTU: 957 ptr = sc->sc_ifbuf; 958 sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT); 959 if (!sc->sc_ifbuf) { 960 sc->sc_ifbuf = ptr; 961 return ENOBUFS; 962 } 963 if (ptr) 964 free(ptr,M_DEVBUF); 965 sc->sc_if.if_mtu = ifr->ifr_mtu; 966 break; 967 968 case SIOCGIFMTU: 969 ifr->ifr_mtu = sc->sc_if.if_mtu; 970 break; 971 972 case SIOCADDMULTI: 973 case SIOCDELMULTI: 974 if (ifr == 0) { 975 return EAFNOSUPPORT; /* XXX */ 976 } 977 switch (ifr->ifr_addr.sa_family) { 978 979 #ifdef INET 980 case AF_INET: 981 break; 982 #endif 983 984 default: 985 return EAFNOSUPPORT; 986 } 987 break; 988 989 default: 990 lprintf("LP:ioctl(0x%x)\n",cmd); 991 return EINVAL; 992 } 993 return 0; 994 } 995 996 static __inline int 997 clpoutbyte (u_char byte, int spin, int data_port, int status_port) 998 { 999 outb(data_port, ctxmitl[byte]); 1000 while (inb(status_port) & CLPIP_SHAKE) 1001 if (--spin == 0) { 1002 return 1; 1003 } 1004 outb(data_port, ctxmith[byte]); 1005 while (!(inb(status_port) & CLPIP_SHAKE)) 1006 if (--spin == 0) { 1007 return 1; 1008 } 1009 return 0; 1010 } 1011 1012 static __inline int 1013 clpinbyte (int spin, int data_port, int status_port) 1014 { 1015 int c, cl; 1016 1017 while((inb(status_port) & CLPIP_SHAKE)) 1018 if(!--spin) { 1019 return -1; 1020 } 1021 cl = inb(status_port); 1022 outb(data_port, 0x10); 1023 1024 while(!(inb(status_port) & CLPIP_SHAKE)) 1025 if(!--spin) { 1026 return -1; 1027 } 1028 c = inb(status_port); 1029 outb(data_port, 0x00); 1030 1031 return (ctrecvl[cl] | ctrecvh[c]); 1032 } 1033 1034 static void 1035 lpintr (int unit) 1036 { 1037 struct lpt_softc *sc = lpt_sc + unit; 1038 register int lpt_data_port = sc->sc_port + lpt_data; 1039 register int lpt_stat_port = sc->sc_port + lpt_status; 1040 int lpt_ctrl_port = sc->sc_port + lpt_control; 1041 int len, s, j; 1042 u_char *bp; 1043 u_char c, cl; 1044 struct mbuf *top; 1045 1046 s = splhigh(); 1047 1048 if (sc->sc_if.if_flags & IFF_LINK0) { 1049 1050 /* Ack. the request */ 1051 outb(lpt_data_port, 0x01); 1052 1053 /* Get the packet length */ 1054 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1055 if (j == -1) 1056 goto err; 1057 len = j; 1058 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1059 if (j == -1) 1060 goto err; 1061 len = len + (j << 8); 1062 if (len > sc->sc_if.if_mtu + MLPIPHDRLEN) 1063 goto err; 1064 1065 bp = sc->sc_ifbuf; 1066 1067 while (len--) { 1068 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1069 if (j == -1) { 1070 goto err; 1071 } 1072 *bp++ = j; 1073 } 1074 /* Get and ignore checksum */ 1075 j = clpinbyte(LPMAXSPIN2, lpt_data_port, lpt_stat_port); 1076 if (j == -1) { 1077 goto err; 1078 } 1079 1080 len = bp - sc->sc_ifbuf; 1081 if (len <= CLPIPHDRLEN) 1082 goto err; 1083 1084 sc->sc_iferrs = 0; 1085 1086 if (IF_QFULL(&ipintrq)) { 1087 lprintf("DROP"); 1088 IF_DROP(&ipintrq); 1089 goto done; 1090 } 1091 len -= CLPIPHDRLEN; 1092 sc->sc_if.if_ipackets++; 1093 sc->sc_if.if_ibytes += len; 1094 top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0); 1095 if (top) { 1096 IF_ENQUEUE(&ipintrq, top); 1097 schednetisr(NETISR_IP); 1098 } 1099 goto done; 1100 } 1101 while ((inb(lpt_stat_port) & LPIP_SHAKE)) { 1102 len = sc->sc_if.if_mtu + LPIPHDRLEN; 1103 bp = sc->sc_ifbuf; 1104 while (len--) { 1105 1106 cl = inb(lpt_stat_port); 1107 outb(lpt_data_port, 8); 1108 1109 j = LPMAXSPIN2; 1110 while((inb(lpt_stat_port) & LPIP_SHAKE)) 1111 if(!--j) goto err; 1112 1113 c = inb(lpt_stat_port); 1114 outb(lpt_data_port, 0); 1115 1116 *bp++= trecvh[cl] | trecvl[c]; 1117 1118 j = LPMAXSPIN2; 1119 while (!((cl=inb(lpt_stat_port)) & LPIP_SHAKE)) { 1120 if (cl != c && 1121 (((cl = inb(lpt_stat_port)) ^ 0xb8) & 0xf8) == 1122 (c & 0xf8)) 1123 goto end; 1124 if (!--j) goto err; 1125 } 1126 } 1127 1128 end: 1129 len = bp - sc->sc_ifbuf; 1130 if (len <= LPIPHDRLEN) 1131 goto err; 1132 1133 sc->sc_iferrs = 0; 1134 1135 if (IF_QFULL(&ipintrq)) { 1136 lprintf("DROP"); 1137 IF_DROP(&ipintrq); 1138 goto done; 1139 } 1140 #if NBPFILTER > 0 1141 if (sc->sc_if.if_bpf) { 1142 bpf_tap(&sc->sc_if, sc->sc_ifbuf, len); 1143 } 1144 #endif 1145 len -= LPIPHDRLEN; 1146 sc->sc_if.if_ipackets++; 1147 sc->sc_if.if_ibytes += len; 1148 top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0); 1149 if (top) { 1150 IF_ENQUEUE(&ipintrq, top); 1151 schednetisr(NETISR_IP); 1152 } 1153 } 1154 goto done; 1155 1156 err: 1157 outb(lpt_data_port, 0); 1158 lprintf("R"); 1159 sc->sc_if.if_ierrors++; 1160 sc->sc_iferrs++; 1161 1162 /* 1163 * We are not able to send receive anything for now, 1164 * so stop wasting our time 1165 */ 1166 if (sc->sc_iferrs > LPMAXERRS) { 1167 printf("lp%d: Too many errors, Going off-line.\n", unit); 1168 outb(lpt_ctrl_port, 0x00); 1169 sc->sc_if.if_flags &= ~IFF_RUNNING; 1170 sc->sc_iferrs=0; 1171 } 1172 1173 done: 1174 splx(s); 1175 return; 1176 } 1177 1178 static __inline int 1179 lpoutbyte (u_char byte, int spin, int data_port, int status_port) 1180 { 1181 outb(data_port, txmith[byte]); 1182 while (!(inb(status_port) & LPIP_SHAKE)) 1183 if (--spin == 0) 1184 return 1; 1185 outb(data_port, txmitl[byte]); 1186 while (inb(status_port) & LPIP_SHAKE) 1187 if (--spin == 0) 1188 return 1; 1189 return 0; 1190 } 1191 1192 static int 1193 lpoutput (struct ifnet *ifp, struct mbuf *m, 1194 struct sockaddr *dst, struct rtentry *rt) 1195 { 1196 register int lpt_data_port = lpt_sc[ifp->if_unit].sc_port + lpt_data; 1197 register int lpt_stat_port = lpt_sc[ifp->if_unit].sc_port + lpt_status; 1198 int lpt_ctrl_port = lpt_sc[ifp->if_unit].sc_port + lpt_control; 1199 1200 int s, err; 1201 struct mbuf *mm; 1202 u_char *cp = "\0\0"; 1203 u_char chksum = 0; 1204 int count = 0; 1205 int i; 1206 int spin; 1207 1208 /* We need a sensible value if we abort */ 1209 cp++; 1210 ifp->if_flags |= IFF_RUNNING; 1211 1212 err = 1; /* assume we're aborting because of an error */ 1213 1214 s = splhigh(); 1215 1216 /* Suspend (on laptops) or receive-errors might have taken us offline */ 1217 outb(lpt_ctrl_port, LPC_ENA); 1218 1219 if (ifp->if_flags & IFF_LINK0) { 1220 1221 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1222 lprintf("&"); 1223 lptintr(ifp->if_unit); 1224 } 1225 1226 /* Alert other end to pending packet */ 1227 spin = LPMAXSPIN1; 1228 outb(lpt_data_port, 0x08); 1229 while ((inb(lpt_stat_port) & 0x08) == 0) 1230 if (--spin == 0) { 1231 goto nend; 1232 } 1233 1234 /* Calculate length of packet, then send that */ 1235 1236 count += 14; /* Ethernet header len */ 1237 1238 mm = m; 1239 for (mm = m; mm; mm = mm->m_next) { 1240 count += mm->m_len; 1241 } 1242 if (clpoutbyte(count & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1243 goto nend; 1244 if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1245 goto nend; 1246 1247 /* Send dummy ethernet header */ 1248 for (i = 0; i < 12; i++) { 1249 if (clpoutbyte(i, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1250 goto nend; 1251 chksum += i; 1252 } 1253 1254 if (clpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1255 goto nend; 1256 if (clpoutbyte(0x00, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1257 goto nend; 1258 chksum += 0x08 + 0x00; /* Add into checksum */ 1259 1260 mm = m; 1261 do { 1262 cp = mtod(mm, u_char *); 1263 while (mm->m_len--) { 1264 chksum += *cp; 1265 if (clpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1266 goto nend; 1267 } 1268 } while ((mm = mm->m_next)); 1269 1270 /* Send checksum */ 1271 if (clpoutbyte(chksum, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1272 goto nend; 1273 1274 /* Go quiescent */ 1275 outb(lpt_data_port, 0); 1276 1277 err = 0; /* No errors */ 1278 1279 nend: 1280 if (err) { /* if we didn't timeout... */ 1281 ifp->if_oerrors++; 1282 lprintf("X"); 1283 } else { 1284 ifp->if_opackets++; 1285 ifp->if_obytes += m->m_pkthdr.len; 1286 } 1287 1288 m_freem(m); 1289 1290 if (!(inb(lpt_stat_port) & CLPIP_SHAKE)) { 1291 lprintf("^"); 1292 lptintr(ifp->if_unit); 1293 } 1294 (void) splx(s); 1295 return 0; 1296 } 1297 1298 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1299 lprintf("&"); 1300 lptintr(ifp->if_unit); 1301 } 1302 1303 if (lpoutbyte(0x08, LPMAXSPIN1, lpt_data_port, lpt_stat_port)) 1304 goto end; 1305 if (lpoutbyte(0x00, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1306 goto end; 1307 1308 mm = m; 1309 do { 1310 cp = mtod(mm,u_char *); 1311 while (mm->m_len--) 1312 if (lpoutbyte(*cp++, LPMAXSPIN2, lpt_data_port, lpt_stat_port)) 1313 goto end; 1314 } while ((mm = mm->m_next)); 1315 1316 err = 0; /* no errors were encountered */ 1317 1318 end: 1319 --cp; 1320 outb(lpt_data_port, txmitl[*cp] ^ 0x17); 1321 1322 if (err) { /* if we didn't timeout... */ 1323 ifp->if_oerrors++; 1324 lprintf("X"); 1325 } else { 1326 ifp->if_opackets++; 1327 ifp->if_obytes += m->m_pkthdr.len; 1328 #if NBPFILTER > 0 1329 if (ifp->if_bpf) { 1330 /* 1331 * We need to prepend the packet type as 1332 * a two byte field. Cons up a dummy header 1333 * to pacify bpf. This is safe because bpf 1334 * will only read from the mbuf (i.e., it won't 1335 * try to free it or keep a pointer to it). 1336 */ 1337 struct mbuf m0; 1338 u_short hdr = 0x800; 1339 1340 m0.m_next = m; 1341 m0.m_len = 2; 1342 m0.m_data = (char *)&hdr; 1343 1344 bpf_mtap(ifp, &m0); 1345 } 1346 #endif 1347 } 1348 1349 m_freem(m); 1350 1351 if (inb(lpt_stat_port) & LPIP_SHAKE) { 1352 lprintf("^"); 1353 lptintr(ifp->if_unit); 1354 } 1355 1356 (void) splx(s); 1357 return 0; 1358 } 1359 1360 #endif /* INET */ 1361 1362 static lpt_devsw_installed = 0; 1363 1364 static void lpt_drvinit(void *unused) 1365 { 1366 dev_t dev; 1367 1368 if( ! lpt_devsw_installed ) { 1369 dev = makedev(CDEV_MAJOR, 0); 1370 cdevsw_add(&dev,&lpt_cdevsw, NULL); 1371 lpt_devsw_installed = 1; 1372 } 1373 } 1374 1375 SYSINIT(lptdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,lpt_drvinit,NULL) 1376
Cache object: c7a48f7ad9f217b629306de2aab36e19
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