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sys/pc98/pc98/olpt.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: releng/5.0/sys/pc98/pc98/olpt.c 83430 2001-09-14 04:50:27Z imp $ 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 <sys/param.h> 105 #include <sys/systm.h> 106 #include <sys/conf.h> 107 #include <sys/bio.h> 108 #include <sys/buf.h> 109 #include <sys/bus.h> 110 #include <sys/kernel.h> 111 #include <sys/uio.h> 112 #include <sys/syslog.h> 113 114 #include <machine/clock.h> 115 #include <machine/bus.h> 116 #include <machine/resource.h> 117 #include <sys/rman.h> 118 119 #include <isa/isavar.h> 120 121 #include <i386/isa/lptreg.h> 122 #include <dev/ppbus/lptio.h> 123 124 #define LPINITRDY 4 /* wait up to 4 seconds for a ready */ 125 #define LPTOUTINITIAL 10 /* initial timeout to wait for ready 1/10 s */ 126 #define LPTOUTMAX 1 /* maximal timeout 1 s */ 127 #define LPPRI (PZERO+8) 128 #define BUFSIZE 1024 129 130 #ifndef PC98 131 /* BIOS printer list - used by BIOS probe*/ 132 #define BIOS_LPT_PORTS 0x408 133 #define BIOS_PORTS (short *)(KERNBASE+BIOS_LPT_PORTS) 134 #define BIOS_MAX_LPT 4 135 #endif 136 137 138 #ifndef DEBUG 139 #define lprintf(args) 140 #else 141 #define lprintf(args) do { \ 142 if (lptflag) \ 143 printf args; \ 144 } while (0) 145 static int volatile lptflag = 1; 146 #endif 147 148 #define LPTUNIT(s) ((s)&0x03) 149 #define LPTFLAGS(s) ((s)&0xfc) 150 151 struct lpt_softc { 152 struct resource *res_port; 153 struct resource *res_irq; 154 void *sc_ih; 155 156 int sc_port; 157 short sc_state; 158 /* default case: negative prime, negative ack, handshake strobe, 159 prime once */ 160 u_char sc_control; 161 char sc_flags; 162 #define LP_POS_INIT 0x04 /* if we are a postive init signal */ 163 #define LP_POS_ACK 0x08 /* if we are a positive going ack */ 164 #define LP_NO_PRIME 0x10 /* don't prime the printer at all */ 165 #define LP_PRIMEOPEN 0x20 /* prime on every open */ 166 #define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */ 167 #define LP_BYPASS 0x80 /* bypass printer ready checks */ 168 struct buf *sc_inbuf; 169 short sc_xfercnt ; 170 char sc_primed; 171 char *sc_cp ; 172 u_char sc_irq ; /* IRQ status of port */ 173 #define LP_HAS_IRQ 0x01 /* we have an irq available */ 174 #define LP_USE_IRQ 0x02 /* we are using our irq */ 175 #define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */ 176 u_char sc_backoff ; /* time to call lptout() again */ 177 }; 178 179 /* bits for state */ 180 #define OPEN (1<<0) /* device is open */ 181 #define ASLP (1<<1) /* awaiting draining of printer */ 182 #define ERROR (1<<2) /* error was received from printer */ 183 #define OBUSY (1<<3) /* printer is busy doing output */ 184 #define LPTOUT (1<<4) /* timeout while not selected */ 185 #define TOUT (1<<5) /* timeout while not selected */ 186 #define INIT (1<<6) /* waiting to initialize for open */ 187 #define INTERRUPTED (1<<7) /* write call was interrupted */ 188 189 190 /* status masks to interrogate printer status */ 191 #define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */ 192 #define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR) 193 194 /* Printer Ready condition - from lpa.c */ 195 /* Only used in polling code */ 196 #ifdef PC98 197 #define NOT_READY(x) ((inb(x) & LPS_NBSY) != LPS_NBSY) 198 #else /* IBM-PC */ 199 #define LPS_INVERT (LPS_NBSY | LPS_NACK | LPS_SEL | LPS_NERR) 200 #define LPS_MASK (LPS_NBSY | LPS_NACK | LPS_OUT | LPS_SEL | LPS_NERR) 201 #define NOT_READY(x) ((inb(x)^LPS_INVERT)&LPS_MASK) 202 #endif 203 204 #define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */ 205 #define MAX_SPIN 20 /* Max delay for device ready in usecs */ 206 207 static timeout_t lptout; 208 static int lpt_probe(device_t); 209 static int lpt_attach(device_t); 210 static void lpt_intr(void *); 211 212 static devclass_t olpt_devclass; 213 214 static device_method_t olpt_methods[] = { 215 DEVMETHOD(device_probe, lpt_probe), 216 DEVMETHOD(device_attach, lpt_attach), 217 { 0, 0 } 218 }; 219 220 static driver_t olpt_driver = { 221 "olpt", 222 olpt_methods, 223 sizeof (struct lpt_softc), 224 }; 225 226 DRIVER_MODULE(olpt, isa, olpt_driver, olpt_devclass, 0, 0); 227 228 static d_open_t lptopen; 229 static d_close_t lptclose; 230 static d_write_t lptwrite; 231 static d_ioctl_t lptioctl; 232 233 #define CDEV_MAJOR 16 234 static struct cdevsw lpt_cdevsw = { 235 /* open */ lptopen, 236 /* close */ lptclose, 237 /* read */ noread, 238 /* write */ lptwrite, 239 /* ioctl */ lptioctl, 240 /* poll */ nopoll, 241 /* mmap */ nommap, 242 /* strategy */ nostrategy, 243 /* name */ "lpt", 244 /* maj */ CDEV_MAJOR, 245 /* dump */ nodump, 246 /* psize */ nopsize, 247 /* flags */ 0, 248 }; 249 250 static bus_addr_t lpt_iat[] = {0, 2, 4, 6}; 251 252 #ifndef PC98 253 /* 254 * Internal routine to lptprobe to do port tests of one byte value 255 */ 256 static int 257 lpt_port_test (int port, u_char data, u_char mask) 258 { 259 int temp, timeout; 260 261 data = data & mask; 262 outb(port, data); 263 timeout = 10000; 264 do { 265 DELAY(10); 266 temp = inb(port) & mask; 267 } 268 while (temp != data && --timeout); 269 lprintf(("Port 0x%x\tout=%x\tin=%x\ttout=%d\n", 270 port, data, temp, timeout)); 271 return (temp == data); 272 } 273 #endif /* PC98 */ 274 275 /* 276 * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94 277 * Based partially on Rod Grimes' printer probe 278 * 279 * Logic: 280 * 1) If no port address was given, use the bios detected ports 281 * and autodetect what ports the printers are on. 282 * 2) Otherwise, probe the data port at the address given, 283 * using the method in Rod Grimes' port probe. 284 * (Much code ripped off directly from Rod's probe.) 285 * 286 * Comments from Rod's probe: 287 * Logic: 288 * 1) You should be able to write to and read back the same value 289 * to the data port. Do an alternating zeros, alternating ones, 290 * walking zero, and walking one test to check for stuck bits. 291 * 292 * 2) You should be able to write to and read back the same value 293 * to the control port lower 5 bits, the upper 3 bits are reserved 294 * per the IBM PC technical reference manauls and different boards 295 * do different things with them. Do an alternating zeros, alternating 296 * ones, walking zero, and walking one test to check for stuck bits. 297 * 298 * Some printers drag the strobe line down when the are powered off 299 * so this bit has been masked out of the control port test. 300 * 301 * XXX Some printers may not like a fast pulse on init or strobe, I 302 * don't know at this point, if that becomes a problem these bits 303 * should be turned off in the mask byte for the control port test. 304 * 305 * We are finally left with a mask of 0x14, due to some printers 306 * being adamant about holding other bits high ........ 307 * 308 * Before probing the control port, we write a 0 to the data port - 309 * If not, some printers chuck out garbage when the strobe line 310 * gets toggled. 311 * 312 * 3) Set the data and control ports to a value of 0 313 * 314 * This probe routine has been tested on Epson Lx-800, HP LJ3P, 315 * Epson FX-1170 and C.Itoh 8510RM 316 * printers. 317 * Quick exit on fail added. 318 */ 319 320 int 321 lpt_probe(device_t dev) 322 { 323 #ifdef PC98 324 #define PC98_OLD_LPT 0x40 325 #define PC98_IEEE_1284_FUNCTION 0x149 326 int rid; 327 struct resource *res; 328 329 /* Check isapnp ids */ 330 if (isa_get_vendorid(dev)) 331 return ENXIO; 332 333 rid = 0; 334 res = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, lpt_iat, 4, 335 RF_ACTIVE); 336 if (res == NULL) 337 return ENXIO; 338 isa_load_resourcev(res, lpt_iat, 4); 339 340 if (isa_get_port(dev) == PC98_OLD_LPT) { 341 unsigned int pc98_ieee_mode, tmp; 342 343 tmp = inb(PC98_IEEE_1284_FUNCTION); 344 pc98_ieee_mode = tmp; 345 if ((tmp & 0x10) == 0x10) { 346 outb(PC98_IEEE_1284_FUNCTION, tmp & ~0x10); 347 tmp = inb(PC98_IEEE_1284_FUNCTION); 348 if ((tmp & 0x10) != 0x10) { 349 outb(PC98_IEEE_1284_FUNCTION, pc98_ieee_mode); 350 bus_release_resource(dev, SYS_RES_IOPORT, rid, 351 res); 352 return ENXIO; 353 } 354 } 355 } 356 357 bus_release_resource(dev, SYS_RES_IOPORT, rid, res); 358 return 0; 359 #else 360 int port; 361 static short next_bios_lpt = 0; 362 int status; 363 static u_char testbyte[18] = { 364 0x55, /* alternating zeros */ 365 0xaa, /* alternating ones */ 366 0xfe, 0xfd, 0xfb, 0xf7, 367 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */ 368 0x01, 0x02, 0x04, 0x08, 369 0x10, 0x20, 0x40, 0x80 /* walking one */ 370 }; 371 int i; 372 373 /* 374 * Make sure there is some way for lptopen to see that 375 * the port is not configured 376 * This 0 will remain if the port isn't attached 377 */ 378 (lpt_sc + dvp->id_unit)->sc_port = 0; 379 380 status = IO_LPTSIZE; 381 /* If port not specified, use bios list */ 382 if(dvp->id_iobase < 0) { /* port? */ 383 if((next_bios_lpt < BIOS_MAX_LPT) && 384 (*(BIOS_PORTS+next_bios_lpt) != 0) ) { 385 dvp->id_iobase = *(BIOS_PORTS+next_bios_lpt++); 386 goto end_probe; 387 } else 388 return (0); 389 } 390 391 /* Port was explicitly specified */ 392 /* This allows probing of ports unknown to the BIOS */ 393 port = dvp->id_iobase + lpt_data; 394 for (i = 0; i < 18; i++) { 395 if (!lpt_port_test(port, testbyte[i], 0xff)) { 396 status = 0; 397 goto end_probe; 398 } 399 } 400 401 end_probe: 402 /* write 0's to control and data ports */ 403 outb(dvp->id_iobase+lpt_data, 0); 404 outb(dvp->id_iobase+lpt_control, 0); 405 406 return (status); 407 #endif 408 } 409 410 /* XXX Todo - try and detect if interrupt is working */ 411 int 412 lpt_attach(device_t dev) 413 { 414 int rid, unit; 415 struct lpt_softc *sc; 416 417 unit = device_get_unit(dev); 418 sc = device_get_softc(dev); 419 420 rid = 0; 421 sc->res_port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, 422 lpt_iat, 4, RF_ACTIVE); 423 if (sc->res_port == NULL) 424 return ENXIO; 425 isa_load_resourcev(sc->res_port, lpt_iat, 4); 426 427 sc->sc_port = rman_get_start(sc->res_port); 428 sc->sc_primed = 0; /* not primed yet */ 429 #ifdef PC98 430 outb(sc->sc_port+lpt_pstb_ctrl, LPC_DIS_PSTB); /* PSTB disable */ 431 outb(sc->sc_port+lpt_control, LPC_MODE8255); /* 8255 mode set */ 432 outb(sc->sc_port+lpt_control, LPC_NIRQ8); /* IRQ8 inactive */ 433 outb(sc->sc_port+lpt_control, LPC_NPSTB); /* PSTB inactive */ 434 outb(sc->sc_port+lpt_pstb_ctrl, LPC_EN_PSTB); /* PSTB enable */ 435 #else 436 outb(sc->sc_port+lpt_control, LPC_NINIT); 437 #endif 438 439 sc->sc_irq = 0; 440 if (isa_get_irq(dev) != -1) { 441 rid = 0; 442 sc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 443 0, ~0, 1, RF_ACTIVE); 444 if (sc->res_irq == NULL) { 445 bus_release_resource(dev, SYS_RES_IOPORT, 0, 446 sc->res_port); 447 return ENXIO; 448 } 449 if (bus_setup_intr(dev, sc->res_irq, INTR_TYPE_TTY, lpt_intr, 450 sc, &sc->sc_ih)) { 451 bus_release_resource(dev, SYS_RES_IOPORT, 0, 452 sc->res_port); 453 bus_release_resource(dev, SYS_RES_IRQ, 0, 454 sc->res_irq); 455 return ENXIO; 456 } 457 sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ; 458 device_printf(dev, "Interrupt-driven port"); 459 } 460 461 /* XXX what to do about the flags in the minor number? */ 462 make_dev(&lpt_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit); 463 make_dev(&lpt_cdevsw, unit | LP_BYPASS, 464 UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit); 465 466 return 0; 467 } 468 469 /* 470 * lptopen -- reset the printer, then wait until it's selected and not busy. 471 * If LP_BYPASS flag is selected, then we do not try to select the 472 * printer -- this is just used for passing ioctls. 473 */ 474 475 static int 476 lptopen (dev_t dev, int flags, int fmt, struct thread *td) 477 { 478 struct lpt_softc *sc; 479 int s; 480 #ifdef PC98 481 int port; 482 #else 483 int trys, port; 484 #endif 485 486 sc = devclass_get_softc(olpt_devclass, LPTUNIT(minor(dev))); 487 if (sc->sc_port == 0) 488 return (ENXIO); 489 490 if (sc->sc_state) { 491 lprintf(("lp: still open %x\n", sc->sc_state)); 492 return(EBUSY); 493 } else 494 sc->sc_state |= INIT; 495 496 sc->sc_flags = LPTFLAGS(minor(dev)); 497 498 /* Check for open with BYPASS flag set. */ 499 if (sc->sc_flags & LP_BYPASS) { 500 sc->sc_state = OPEN; 501 return(0); 502 } 503 504 s = spltty(); 505 lprintf(("lp flags 0x%x\n", sc->sc_flags)); 506 port = sc->sc_port; 507 508 /* set IRQ status according to ENABLE_IRQ flag */ 509 if (sc->sc_irq & LP_ENABLE_IRQ) 510 sc->sc_irq |= LP_USE_IRQ; 511 else 512 sc->sc_irq &= ~LP_USE_IRQ; 513 514 /* init printer */ 515 #ifndef PC98 516 if ((sc->sc_flags & LP_NO_PRIME) == 0) { 517 if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) { 518 outb(port+lpt_control, 0); 519 sc->sc_primed++; 520 DELAY(500); 521 } 522 } 523 524 outb (port+lpt_control, LPC_SEL|LPC_NINIT); 525 526 /* wait till ready (printer running diagnostics) */ 527 trys = 0; 528 do { 529 /* ran out of waiting for the printer */ 530 if (trys++ >= LPINITRDY*4) { 531 splx(s); 532 sc->sc_state = 0; 533 lprintf(("status %x\n", inb(port+lpt_status))); 534 return (EBUSY); 535 } 536 537 /* wait 1/4 second, give up if we get a signal */ 538 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, "lptinit", hz/4) != 539 EWOULDBLOCK) { 540 sc->sc_state = 0; 541 splx(s); 542 return (EBUSY); 543 } 544 545 /* is printer online and ready for output */ 546 } while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 547 (LPS_SEL|LPS_NBSY|LPS_NERR)); 548 549 sc->sc_control = LPC_SEL|LPC_NINIT; 550 if (sc->sc_flags & LP_AUTOLF) 551 sc->sc_control |= LPC_AUTOL; 552 553 /* enable interrupt if interrupt-driven */ 554 if (sc->sc_irq & LP_USE_IRQ) 555 sc->sc_control |= LPC_ENA; 556 557 outb(port+lpt_control, sc->sc_control); 558 #endif 559 560 sc->sc_state = OPEN; 561 sc->sc_inbuf = geteblk(BUFSIZE); 562 sc->sc_xfercnt = 0; 563 splx(s); 564 565 /* only use timeout if using interrupt */ 566 lprintf(("irq %x\n", sc->sc_irq)); 567 if (sc->sc_irq & LP_USE_IRQ) { 568 sc->sc_state |= TOUT; 569 timeout (lptout, (caddr_t)sc, 570 (sc->sc_backoff = hz/LPTOUTINITIAL)); 571 } 572 573 lprintf(("opened.\n")); 574 return(0); 575 } 576 577 static void 578 lptout (void *arg) 579 { 580 struct lpt_softc *sc = arg; 581 int pl; 582 583 lprintf(("T %x ", inb(sc->sc_port+lpt_status))); 584 if (sc->sc_state & OPEN) { 585 sc->sc_backoff++; 586 if (sc->sc_backoff > hz/LPTOUTMAX) 587 sc->sc_backoff = sc->sc_backoff > hz/LPTOUTMAX; 588 timeout (lptout, (caddr_t)sc, sc->sc_backoff); 589 } else 590 sc->sc_state &= ~TOUT; 591 592 if (sc->sc_state & ERROR) 593 sc->sc_state &= ~ERROR; 594 595 /* 596 * Avoid possible hangs do to missed interrupts 597 */ 598 if (sc->sc_xfercnt) { 599 pl = spltty(); 600 lpt_intr(sc); 601 splx(pl); 602 } else { 603 sc->sc_state &= ~OBUSY; 604 wakeup((caddr_t)sc); 605 } 606 } 607 608 /* 609 * lptclose -- close the device, free the local line buffer. 610 * 611 * Check for interrupted write call added. 612 */ 613 614 static int 615 lptclose(dev_t dev, int flags, int fmt, struct thread *td) 616 { 617 struct lpt_softc *sc; 618 #ifndef PC98 619 int port; 620 #endif 621 622 sc = devclass_get_softc(olpt_devclass, LPTUNIT(minor(dev))); 623 if(sc->sc_flags & LP_BYPASS) 624 goto end_close; 625 626 #ifndef PC98 627 port = sc->sc_port; 628 #endif 629 sc->sc_state &= ~OPEN; 630 631 #ifndef PC98 632 /* if the last write was interrupted, don't complete it */ 633 if((!(sc->sc_state & INTERRUPTED)) && (sc->sc_irq & LP_USE_IRQ)) 634 while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 635 (LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt) 636 /* wait 1/4 second, give up if we get a signal */ 637 if (tsleep ((caddr_t)sc, LPPRI|PCATCH, 638 "lpclose", hz) != EWOULDBLOCK) 639 break; 640 641 outb(sc->sc_port+lpt_control, LPC_NINIT); 642 #endif 643 brelse(sc->sc_inbuf); 644 645 end_close: 646 sc->sc_state = 0; 647 sc->sc_xfercnt = 0; 648 lprintf(("closed.\n")); 649 return(0); 650 } 651 652 /* 653 * pushbytes() 654 * Workhorse for actually spinning and writing bytes to printer 655 * Derived from lpa.c 656 * Originally by ? 657 * 658 * This code is only used when we are polling the port 659 */ 660 static int 661 pushbytes(struct lpt_softc * sc) 662 { 663 int spin, err, tic; 664 char ch; 665 int port = sc->sc_port; 666 667 lprintf(("p")); 668 /* loop for every character .. */ 669 while (sc->sc_xfercnt > 0) { 670 /* printer data */ 671 ch = *(sc->sc_cp); 672 sc->sc_cp++; 673 sc->sc_xfercnt--; 674 675 /* 676 * Wait for printer ready. 677 * Loop 20 usecs testing BUSY bit, then sleep 678 * for exponentially increasing timeout. (vak) 679 */ 680 for (spin=0; NOT_READY(port+lpt_status) && spin<MAX_SPIN; ++spin) 681 DELAY(1); /* XXX delay is NOT this accurate! */ 682 if (spin >= MAX_SPIN) { 683 tic = 0; 684 while (NOT_READY(port+lpt_status)) { 685 /* 686 * Now sleep, every cycle a 687 * little longer .. 688 */ 689 tic = tic + tic + 1; 690 /* 691 * But no more than 10 seconds. (vak) 692 */ 693 if (tic > MAX_SLEEP) 694 tic = MAX_SLEEP; 695 err = tsleep((caddr_t)sc, LPPRI, 696 "lptpoll", tic); 697 if (err != EWOULDBLOCK) { 698 return (err); 699 } 700 } 701 } 702 703 /* output data */ 704 outb(port+lpt_data, ch); 705 #ifdef PC98 706 DELAY(1); 707 outb(port+lpt_control, LPC_PSTB); 708 DELAY(1); 709 outb(port+lpt_control, LPC_NPSTB); 710 #else 711 /* strobe */ 712 outb(port+lpt_control, sc->sc_control|LPC_STB); 713 outb(port+lpt_control, sc->sc_control); 714 #endif 715 716 } 717 return(0); 718 } 719 720 /* 721 * lptwrite --copy a line from user space to a local buffer, then call 722 * putc to get the chars moved to the output queue. 723 * 724 * Flagging of interrupted write added. 725 */ 726 727 static int 728 lptwrite(dev_t dev, struct uio * uio, int ioflag) 729 { 730 register unsigned n; 731 int pl, err; 732 struct lpt_softc *sc; 733 734 sc = devclass_get_softc(olpt_devclass, LPTUNIT(minor(dev))); 735 if(sc->sc_flags & LP_BYPASS) { 736 /* we can't do writes in bypass mode */ 737 return(EPERM); 738 } 739 740 sc->sc_state &= ~INTERRUPTED; 741 while ((n = min(BUFSIZE, uio->uio_resid)) != 0) { 742 sc->sc_cp = sc->sc_inbuf->b_data ; 743 uiomove(sc->sc_cp, n, uio); 744 sc->sc_xfercnt = n ; 745 while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) { 746 lprintf(("i")); 747 /* if the printer is ready for a char, */ 748 /* give it one */ 749 if ((sc->sc_state & OBUSY) == 0){ 750 lprintf(("\nC %d. ", sc->sc_xfercnt)); 751 pl = spltty(); 752 lpt_intr(sc); 753 (void) splx(pl); 754 } 755 lprintf(("W ")); 756 if (sc->sc_state & OBUSY) 757 if ((err = tsleep ((caddr_t)sc, 758 LPPRI|PCATCH, "lpwrite", 0))) { 759 sc->sc_state |= INTERRUPTED; 760 return(err); 761 } 762 } 763 /* check to see if we must do a polled write */ 764 if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) { 765 lprintf(("p")); 766 if((err = pushbytes(sc))) 767 return(err); 768 } 769 } 770 return(0); 771 } 772 773 /* 774 * lptintr -- handle printer interrupts which occur when the printer is 775 * ready to accept another char. 776 * 777 * do checking for interrupted write call. 778 */ 779 780 static void 781 lpt_intr(void *arg) 782 { 783 } 784 785 static int 786 lptioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct thread *td) 787 { 788 int error = 0; 789 struct lpt_softc *sc; 790 u_int unit = LPTUNIT(minor(dev)); 791 u_char old_sc_irq; /* old printer IRQ status */ 792 793 sc = devclass_get_softc(olpt_devclass, unit); 794 795 switch (cmd) { 796 case LPT_IRQ : 797 if(sc->sc_irq & LP_HAS_IRQ) { 798 /* 799 * NOTE: 800 * If the IRQ status is changed, 801 * this will only be visible on the 802 * next open. 803 * 804 * If interrupt status changes, 805 * this gets syslog'd. 806 */ 807 old_sc_irq = sc->sc_irq; 808 if(*(int*)data == 0) 809 sc->sc_irq &= (~LP_ENABLE_IRQ); 810 else 811 sc->sc_irq |= LP_ENABLE_IRQ; 812 if (old_sc_irq != sc->sc_irq ) 813 log(LOG_NOTICE, "lpt%c switched to %s mode\n", 814 (char)unit+'', 815 (sc->sc_irq & LP_ENABLE_IRQ)? 816 "interrupt-driven":"polled"); 817 } else /* polled port */ 818 error = EOPNOTSUPP; 819 break; 820 default: 821 error = ENODEV; 822 } 823 824 return(error); 825 }
Cache object: 20c7c17d4666006aad8c4b49a8b20078
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