par.c revision 1.17
1 /* $NetBSD: par.c,v 1.17 1998/01/12 10:40:09 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)ppi.c 7.3 (Berkeley) 12/16/90 36 */ 37 38 /* 39 * parallel port interface 40 */ 41 42 #include "par.h" 43 #if NPAR > 0 44 45 #include <sys/param.h> 46 #include <sys/errno.h> 47 #include <sys/uio.h> 48 #include <sys/device.h> 49 #include <sys/malloc.h> 50 #include <sys/file.h> 51 #include <sys/systm.h> 52 #include <sys/proc.h> 53 54 #include <amiga/amiga/device.h> 55 #include <amiga/amiga/cia.h> 56 #include <amiga/dev/parioctl.h> 57 58 #include <sys/conf.h> 59 #include <machine/conf.h> 60 61 struct par_softc { 62 int sc_flags; 63 struct parparam sc_param; 64 #define sc_burst sc_param.burst 65 #define sc_timo sc_param.timo 66 #define sc_delay sc_param.delay 67 } *par_softcp; 68 69 #define getparsp(x) (x > 0 ? NULL : par_softcp) 70 71 /* sc_flags values */ 72 #define PARF_ALIVE 0x01 73 #define PARF_OPEN 0x02 74 #define PARF_UIO 0x04 75 #define PARF_TIMO 0x08 76 #define PARF_DELAY 0x10 77 #define PARF_OREAD 0x40 78 #define PARF_OWRITE 0x80 79 80 #define UNIT(x) minor(x) 81 82 #ifdef DEBUG 83 int pardebug = 0; 84 #define PDB_FOLLOW 0x01 85 #define PDB_IO 0x02 86 #define PDB_INTERRUPT 0x04 87 #define PDB_NOCHECK 0x80 88 #endif 89 90 int parrw __P((dev_t, struct uio *)); 91 int parhztoms __P((int)); 92 int parmstohz __P((int)); 93 int parsend __P((u_char *, int)); 94 int parreceive __P((u_char *, int)); 95 int parsendch __P((u_char)); 96 97 void partimo __P((void *)); 98 void parstart __P((void *)); 99 void parintr __P((void *)); 100 101 void parattach __P((struct device *, struct device *, void *)); 102 int parmatch __P((struct device *, struct cfdata *, void *)); 103 104 struct cfattach par_ca = { 105 sizeof(struct device), parmatch, parattach 106 }; 107 108 /*ARGSUSED*/ 109 int 110 parmatch(pdp, cfp, auxp) 111 struct device *pdp; 112 struct cfdata *cfp; 113 void *auxp; 114 { 115 116 if (matchname((char *)auxp, "par") && cfp->cf_unit == 0) 117 return(1); 118 return(0); 119 } 120 121 void 122 parattach(pdp, dp, auxp) 123 struct device *pdp, *dp; 124 void *auxp; 125 { 126 par_softcp = (struct par_softc *)dp; 127 128 #ifdef DEBUG 129 if ((pardebug & PDB_NOCHECK) == 0) 130 #endif 131 par_softcp->sc_flags = PARF_ALIVE; 132 printf("\n"); 133 } 134 135 int 136 paropen(dev, flags, mode, p) 137 dev_t dev; 138 int flags; 139 int mode; 140 struct proc *p; 141 { 142 int unit = UNIT(dev); 143 struct par_softc *sc = getparsp(unit); 144 145 if (unit >= NPAR || (sc->sc_flags & PARF_ALIVE) == 0) 146 return(ENXIO); 147 #ifdef DEBUG 148 if (pardebug & PDB_FOLLOW) { 149 printf("paropen(%x, %x): flags %x, ", 150 dev, flags, sc->sc_flags); 151 printf ("port = $%x\n", ((ciab.pra ^ CIAB_PRA_SEL) 152 & (CIAB_PRA_SEL|CIAB_PRA_BUSY|CIAB_PRA_POUT))); 153 } 154 #endif 155 if (sc->sc_flags & PARF_OPEN) 156 return(EBUSY); 157 /* can either read or write, but not both */ 158 if ((flags & (FREAD|FWRITE)) == (FREAD|FWRITE)) 159 return EINVAL; 160 161 sc->sc_flags |= PARF_OPEN; 162 163 if (flags & FREAD) 164 sc->sc_flags |= PARF_OREAD; 165 else 166 sc->sc_flags |= PARF_OWRITE; 167 168 sc->sc_burst = PAR_BURST; 169 sc->sc_timo = parmstohz(PAR_TIMO); 170 sc->sc_delay = parmstohz(PAR_DELAY); 171 /* enable interrupts for CIAA-FLG */ 172 ciaa.icr = CIA_ICR_IR_SC | CIA_ICR_FLG; 173 return(0); 174 } 175 176 int 177 parclose(dev, flags, mode, p) 178 dev_t dev; 179 int flags; 180 int mode; 181 struct proc *p; 182 { 183 int unit = UNIT(dev); 184 struct par_softc *sc = getparsp(unit); 185 186 #ifdef DEBUG 187 if (pardebug & PDB_FOLLOW) 188 printf("parclose(%x, %x): flags %x\n", 189 dev, flags, sc->sc_flags); 190 #endif 191 sc->sc_flags &= ~(PARF_OPEN|PARF_OREAD|PARF_OWRITE); 192 /* don't allow interrupts for CIAA-FLG any longer */ 193 ciaa.icr = CIA_ICR_FLG; 194 return(0); 195 } 196 197 void 198 parstart(arg) 199 void *arg; 200 { 201 struct par_softc *sc; 202 int unit; 203 204 unit = (int)arg; 205 sc = getparsp(unit); 206 #ifdef DEBUG 207 if (pardebug & PDB_FOLLOW) 208 printf("parstart(%x)\n", unit); 209 #endif 210 sc->sc_flags &= ~PARF_DELAY; 211 wakeup(sc); 212 } 213 214 void 215 partimo(arg) 216 void *arg; 217 { 218 struct par_softc *sc; 219 int unit; 220 221 unit = (int) arg; 222 sc = getparsp(unit); 223 #ifdef DEBUG 224 if (pardebug & PDB_FOLLOW) 225 printf("partimo(%x)\n", unit); 226 #endif 227 sc->sc_flags &= ~(PARF_UIO|PARF_TIMO); 228 wakeup(sc); 229 } 230 231 int 232 parread(dev, uio, flags) 233 dev_t dev; 234 struct uio *uio; 235 int flags; 236 { 237 238 #ifdef DEBUG 239 if (pardebug & PDB_FOLLOW) 240 printf("parread(%x, %p)\n", dev, uio); 241 #endif 242 return (parrw(dev, uio)); 243 } 244 245 246 int 247 parwrite(dev, uio, flags) 248 dev_t dev; 249 struct uio *uio; 250 int flags; 251 { 252 253 #ifdef DEBUG 254 if (pardebug & PDB_FOLLOW) 255 printf("parwrite(%x, %p)\n", dev, uio); 256 #endif 257 return (parrw(dev, uio)); 258 } 259 260 261 int 262 parrw(dev, uio) 263 dev_t dev; 264 register struct uio *uio; 265 { 266 int unit = UNIT(dev); 267 register struct par_softc *sc = getparsp(unit); 268 register int s, len, cnt; 269 register char *cp; 270 int error = 0, gotdata = 0; 271 int buflen; 272 char *buf; 273 274 len = 0; 275 cnt = 0; 276 if (!!(sc->sc_flags & PARF_OREAD) ^ (uio->uio_rw == UIO_READ)) 277 return EINVAL; 278 279 if (uio->uio_resid == 0) 280 return(0); 281 282 #ifdef DEBUG 283 if (pardebug & (PDB_FOLLOW|PDB_IO)) 284 printf("parrw(%x, %p, %c): burst %d, timo %d, resid %x\n", 285 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 286 sc->sc_burst, sc->sc_timo, uio->uio_resid); 287 #endif 288 buflen = min(sc->sc_burst, uio->uio_resid); 289 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 290 sc->sc_flags |= PARF_UIO; 291 if (sc->sc_timo > 0) 292 { 293 sc->sc_flags |= PARF_TIMO; 294 timeout(partimo, (void *)unit, sc->sc_timo); 295 } 296 while (uio->uio_resid > 0) 297 { 298 len = min(buflen, uio->uio_resid); 299 cp = buf; 300 if (uio->uio_rw == UIO_WRITE) 301 { 302 error = uiomove(cp, len, uio); 303 if (error) 304 break; 305 } 306 again: 307 s = splbio(); 308 #if 0 309 if ((sc->sc_flags & PARF_UIO) && hpibreq(&sc->sc_dq) == 0) 310 sleep(sc, PRIBIO+1); 311 #endif 312 /* 313 * Check if we timed out during sleep or uiomove 314 */ 315 (void) splsoftclock(); 316 if ((sc->sc_flags & PARF_UIO) == 0) 317 { 318 #ifdef DEBUG 319 if (pardebug & PDB_IO) 320 printf("parrw: uiomove/sleep timo, flags %x\n", 321 sc->sc_flags); 322 #endif 323 if (sc->sc_flags & PARF_TIMO) 324 { 325 untimeout(partimo, (void *)unit); 326 sc->sc_flags &= ~PARF_TIMO; 327 } 328 splx(s); 329 break; 330 } 331 splx(s); 332 /* 333 * Perform the operation 334 */ 335 if (uio->uio_rw == UIO_WRITE) 336 cnt = parsend (cp, len); 337 else 338 cnt = parreceive (cp, len); 339 340 if (cnt < 0) 341 { 342 error = -cnt; 343 break; 344 } 345 346 s = splbio(); 347 #if 0 348 hpibfree(&sc->sc_dq); 349 #endif 350 #ifdef DEBUG 351 if (pardebug & PDB_IO) 352 printf("parrw: %s(%p, %d) -> %d\n", 353 uio->uio_rw == UIO_READ ? "recv" : "send", cp, len, cnt); 354 #endif 355 splx(s); 356 if (uio->uio_rw == UIO_READ) 357 { 358 if (cnt) 359 { 360 error = uiomove(cp, cnt, uio); 361 if (error) 362 break; 363 gotdata++; 364 } 365 /* 366 * Didn't get anything this time, but did in the past. 367 * Consider us done. 368 */ 369 else if (gotdata) 370 break; 371 } 372 s = splsoftclock(); 373 /* 374 * Operation timeout (or non-blocking), quit now. 375 */ 376 if ((sc->sc_flags & PARF_UIO) == 0) 377 { 378 #ifdef DEBUG 379 if (pardebug & PDB_IO) 380 printf("parrw: timeout/done\n"); 381 #endif 382 splx(s); 383 break; 384 } 385 /* 386 * Implement inter-read delay 387 */ 388 if (sc->sc_delay > 0) 389 { 390 sc->sc_flags |= PARF_DELAY; 391 timeout(parstart, (void *)unit, sc->sc_delay); 392 error = tsleep(sc, PCATCH | (PZERO - 1), "par-cdelay", 0); 393 if (error) 394 { 395 splx(s); 396 break; 397 } 398 } 399 splx(s); 400 /* 401 * Must not call uiomove again til we've used all data 402 * that we already grabbed. 403 */ 404 if (uio->uio_rw == UIO_WRITE && cnt != len) 405 { 406 cp += cnt; 407 len -= cnt; 408 cnt = 0; 409 goto again; 410 } 411 } 412 s = splsoftclock(); 413 if (sc->sc_flags & PARF_TIMO) 414 { 415 untimeout(partimo, (void *)unit); 416 sc->sc_flags &= ~PARF_TIMO; 417 } 418 if (sc->sc_flags & PARF_DELAY) 419 { 420 untimeout(parstart, (void *)unit); 421 sc->sc_flags &= ~PARF_DELAY; 422 } 423 splx(s); 424 /* 425 * Adjust for those chars that we uiomove'ed but never wrote 426 */ 427 if (uio->uio_rw == UIO_WRITE && cnt != len) 428 { 429 uio->uio_resid += (len - cnt); 430 #ifdef DEBUG 431 if (pardebug & PDB_IO) 432 printf("parrw: short write, adjust by %d\n", 433 len-cnt); 434 #endif 435 } 436 free(buf, M_DEVBUF); 437 #ifdef DEBUG 438 if (pardebug & (PDB_FOLLOW|PDB_IO)) 439 printf("parrw: return %d, resid %d\n", error, uio->uio_resid); 440 #endif 441 return (error); 442 } 443 444 int 445 parioctl(dev, cmd, data, flag, p) 446 dev_t dev; 447 u_long cmd; 448 caddr_t data; 449 int flag; 450 struct proc *p; 451 { 452 struct par_softc *sc = getparsp(UNIT(dev)); 453 struct parparam *pp, *upp; 454 int error = 0; 455 456 switch (cmd) 457 { 458 case PARIOCGPARAM: 459 pp = &sc->sc_param; 460 upp = (struct parparam *)data; 461 upp->burst = pp->burst; 462 upp->timo = parhztoms(pp->timo); 463 upp->delay = parhztoms(pp->delay); 464 break; 465 466 case PARIOCSPARAM: 467 pp = &sc->sc_param; 468 upp = (struct parparam *)data; 469 if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX || 470 upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX) 471 return(EINVAL); 472 pp->burst = upp->burst; 473 pp->timo = parmstohz(upp->timo); 474 pp->delay = parmstohz(upp->delay); 475 break; 476 477 default: 478 return(EINVAL); 479 } 480 return (error); 481 } 482 483 int 484 parhztoms(h) 485 int h; 486 { 487 extern int hz; 488 register int m = h; 489 490 if (m > 0) 491 m = m * 1000 / hz; 492 return(m); 493 } 494 495 int 496 parmstohz(m) 497 int m; 498 { 499 extern int hz; 500 register int h = m; 501 502 if (h > 0) { 503 h = h * hz / 1000; 504 if (h == 0) 505 h = 1000 / hz; 506 } 507 return(h); 508 } 509 510 /* stuff below here if for interrupt driven output of data thru 511 the parallel port. */ 512 513 int partimeout_pending; 514 int parsend_pending; 515 516 void 517 parintr(arg) 518 void *arg; 519 { 520 int s, mask; 521 522 mask = (int)arg; 523 s = splclock(); 524 525 #ifdef DEBUG 526 if (pardebug & PDB_INTERRUPT) 527 printf("parintr %s\n", mask ? "FLG" : "tout"); 528 #endif 529 /* 530 * if invoked from timeout handler, mask will be 0, 531 * if from interrupt, it will contain the cia-icr mask, 532 * which is != 0 533 */ 534 if (mask) { 535 if (partimeout_pending) 536 untimeout(parintr, 0); 537 if (parsend_pending) 538 parsend_pending = 0; 539 } 540 541 /* either way, there won't be a timeout pending any longer */ 542 partimeout_pending = 0; 543 544 wakeup(parintr); 545 splx(s); 546 } 547 548 int 549 parsendch (ch) 550 u_char ch; 551 { 552 int error = 0; 553 int s; 554 555 /* if either offline, busy or out of paper, wait for that 556 condition to clear */ 557 s = splclock(); 558 while (!error 559 && (parsend_pending 560 || ((ciab.pra ^ CIAB_PRA_SEL) 561 & (CIAB_PRA_SEL|CIAB_PRA_BUSY|CIAB_PRA_POUT)))) 562 { 563 extern int hz; 564 565 #ifdef DEBUG 566 if (pardebug & PDB_INTERRUPT) 567 printf ("parsendch, port = $%x\n", 568 ((ciab.pra ^ CIAB_PRA_SEL) 569 & (CIAB_PRA_SEL|CIAB_PRA_BUSY|CIAB_PRA_POUT))); 570 #endif 571 /* wait a second, and try again */ 572 timeout(parintr, 0, hz); 573 partimeout_pending = 1; 574 /* this is essentially a flipflop to have us wait for the 575 first character being transmitted when trying to transmit 576 the second, etc. */ 577 parsend_pending = 0; 578 /* it's quite important that a parallel putc can be 579 interrupted, given the possibility to lock a printer 580 in an offline condition.. */ 581 if ((error = tsleep(parintr, PCATCH | (PZERO - 1), "parsendch", 0)) > 0) 582 { 583 #ifdef DEBUG 584 if (pardebug & PDB_INTERRUPT) 585 printf ("parsendch interrupted, error = %d\n", error); 586 #endif 587 if (partimeout_pending) 588 untimeout(parintr, 0); 589 590 partimeout_pending = 0; 591 } 592 } 593 594 if (! error) 595 { 596 #ifdef DEBUG 597 if (pardebug & PDB_INTERRUPT) 598 printf ("#%d", ch); 599 #endif 600 ciaa.prb = ch; 601 parsend_pending = 1; 602 } 603 604 splx (s); 605 606 return error; 607 } 608 609 610 int 611 parsend (buf, len) 612 u_char *buf; 613 int len; 614 { 615 int err, orig_len = len; 616 617 /* make sure I/O lines are setup right for output */ 618 619 /* control lines set to input */ 620 ciab.ddra &= ~(CIAB_PRA_SEL|CIAB_PRA_POUT|CIAB_PRA_BUSY); 621 /* data lines to output */ 622 ciaa.ddrb = 0xff; 623 624 for (; len; len--, buf++) 625 if ((err = parsendch (*buf)) != 0) 626 return err < 0 ? -EINTR : -err; 627 628 /* either all or nothing.. */ 629 return orig_len; 630 } 631 632 633 634 int 635 parreceive (buf, len) 636 u_char *buf; 637 int len; 638 { 639 /* oh deary me, something's gotta be left to be implemented 640 later... */ 641 return 0; 642 } 643 644 645 #endif 646
Indexes created Wed Oct 01 13:09:50 GMT 2025