par.c revision 1.17
1 /* $NetBSD: par.c,v 1.17 2002/10/23 09:12:47 jdolecek 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 <sys/param.h> 43 #include <sys/errno.h> 44 #include <sys/uio.h> 45 #include <sys/device.h> 46 #include <sys/malloc.h> 47 #include <sys/file.h> 48 #include <sys/systm.h> 49 #include <sys/callout.h> 50 #include <sys/proc.h> 51 #include <sys/conf.h> 52 53 #include <machine/bus.h> 54 #include <machine/cpu.h> 55 #include <machine/parioctl.h> 56 57 #include <arch/x68k/dev/intiovar.h> 58 59 struct par_softc { 60 struct device sc_dev; 61 62 bus_space_tag_t sc_bst; 63 bus_space_handle_t sc_bsh; 64 int sc_flags; 65 struct parparam sc_param; 66 #define sc_burst sc_param.burst 67 #define sc_timo sc_param.timo 68 #define sc_delay sc_param.delay 69 struct callout sc_timo_ch; 70 struct callout sc_start_ch; 71 } ; 72 73 /* par registers */ 74 #define PAR_DATA 1 75 #define PAR_STROBE 3 76 77 /* sc_flags values */ 78 #define PARF_ALIVE 0x01 79 #define PARF_OPEN 0x02 80 #define PARF_UIO 0x04 81 #define PARF_TIMO 0x08 82 #define PARF_DELAY 0x10 83 #define PARF_OREAD 0x40 /* no support */ 84 #define PARF_OWRITE 0x80 85 86 87 void partimo __P((void *)); 88 void parstart __P((void *);) 89 void parintr __P((void *)); 90 int parrw __P((dev_t, struct uio *)); 91 int parhztoms __P((int)); 92 int parmstohz __P((int)); 93 int parsendch __P((struct par_softc*, u_char)); 94 int parsend __P((struct par_softc*, u_char *, int)); 95 96 static struct callout intr_callout = CALLOUT_INITIALIZER; 97 98 #define UNIT(x) minor(x) 99 100 #ifdef DEBUG 101 #define PDB_FOLLOW 0x01 102 #define PDB_IO 0x02 103 #define PDB_INTERRUPT 0x04 104 #define PDB_NOCHECK 0x80 105 #ifdef PARDEBUG 106 int pardebug = PDB_FOLLOW | PDB_IO | PDB_INTERRUPT; 107 #else 108 int pardebug = 0; 109 #endif 110 #endif 111 112 int parmatch __P((struct device *, struct cfdata *, void *)); 113 void parattach __P((struct device *, struct device *, void *)); 114 115 CFATTACH_DECL(par, sizeof(struct par_softc), 116 parmatch, parattach, NULL, NULL); 117 118 extern struct cfdriver par_cd; 119 120 dev_type_open(paropen); 121 dev_type_close(parclose); 122 dev_type_write(parwrite); 123 dev_type_ioctl(parioctl); 124 125 const struct cdevsw par_cdevsw = { 126 paropen, parclose, noread, parwrite, parioctl, 127 nostop, notty, nopoll, nommap, nokqfilter, 128 }; 129 130 int 131 parmatch(pdp, cfp, aux) 132 struct device *pdp; 133 struct cfdata *cfp; 134 void *aux; 135 { 136 struct intio_attach_args *ia = aux; 137 138 /* X680x0 has only one parallel port */ 139 if (strcmp(ia->ia_name, "par") || cfp->cf_unit > 0) 140 return 0; 141 142 if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) 143 ia->ia_addr = 0xe8c000; 144 ia->ia_size = 0x2000; 145 if (intio_map_allocate_region (pdp, ia, INTIO_MAP_TESTONLY)) 146 return 0; 147 if (ia->ia_intr == INTIOCF_INTR_DEFAULT) 148 ia->ia_intr = 99; 149 #if DIAGNOSTIC 150 if (ia->ia_intr != 99) 151 return 0; 152 #endif 153 154 return 1; 155 } 156 157 void 158 parattach(pdp, dp, aux) 159 struct device *pdp, *dp; 160 void *aux; 161 { 162 register struct par_softc *sc = (struct par_softc *)dp; 163 struct intio_attach_args *ia = aux; 164 int r; 165 166 sc->sc_flags = PARF_ALIVE; 167 printf(": parallel port (write only, interrupt)\n"); 168 ia->ia_size = 0x2000; 169 r = intio_map_allocate_region (pdp, ia, INTIO_MAP_ALLOCATE); 170 #ifdef DIAGNOSTIC 171 if (r) 172 panic ("IO map for PAR corruption??"); 173 #endif 174 sc->sc_bst = ia->ia_bst; 175 r = bus_space_map (sc->sc_bst, 176 ia->ia_addr, ia->ia_size, 177 BUS_SPACE_MAP_SHIFTED, 178 &sc->sc_bsh); 179 #ifdef DIAGNOSTIC 180 if (r) 181 panic ("Cannot map IO space for PAR."); 182 #endif 183 184 intio_set_sicilian_intr(intio_get_sicilian_intr() & 185 ~SICILIAN_INTR_PAR); 186 187 intio_intr_establish(ia->ia_intr, "par", 188 (intio_intr_handler_t) parintr, (void*) 1); 189 190 callout_init(&sc->sc_timo_ch); 191 callout_init(&sc->sc_start_ch); 192 } 193 194 int 195 paropen(dev, flags, mode, p) 196 dev_t dev; 197 int flags, mode; 198 struct proc *p; 199 { 200 register int unit = UNIT(dev); 201 register struct par_softc *sc; 202 203 if (unit != 0) 204 return(ENXIO); 205 sc = par_cd.cd_devs[unit]; 206 if (!(sc->sc_flags & PARF_ALIVE)) 207 return(ENXIO); 208 if (sc->sc_flags & PARF_OPEN) 209 return(EBUSY); 210 /* X680x0 can't read */ 211 if ((flags & FREAD) == FREAD) 212 return (EINVAL); 213 214 sc->sc_flags |= PARF_OPEN; 215 216 sc->sc_flags |= PARF_OWRITE; 217 218 sc->sc_burst = PAR_BURST; 219 sc->sc_timo = parmstohz(PAR_TIMO); 220 sc->sc_delay = parmstohz(PAR_DELAY); 221 222 return(0); 223 } 224 225 int 226 parclose(dev, flags, mode, p) 227 dev_t dev; 228 int flags, mode; 229 struct proc *p; 230 { 231 int unit = UNIT(dev); 232 int s; 233 struct par_softc *sc = par_cd.cd_devs[unit]; 234 235 sc->sc_flags &= ~(PARF_OPEN|PARF_OWRITE); 236 237 /* don't allow interrupts any longer */ 238 s = spl1(); 239 intio_set_sicilian_intr(intio_get_sicilian_intr() & 240 ~SICILIAN_INTR_PAR); 241 splx(s); 242 243 return (0); 244 } 245 246 void 247 parstart(arg) 248 void *arg; 249 { 250 struct par_softc *sc = arg; 251 #ifdef DEBUG 252 if (pardebug & PDB_FOLLOW) 253 printf("parstart(%x)\n", sc->sc_dev.dv_unit); 254 #endif 255 sc->sc_flags &= ~PARF_DELAY; 256 wakeup(sc); 257 } 258 259 void 260 partimo(arg) 261 void *arg; 262 { 263 struct par_softc *sc = arg; 264 #ifdef DEBUG 265 if (pardebug & PDB_FOLLOW) 266 printf("partimo(%x)\n", sc->sc_dev.dv_unit); 267 #endif 268 sc->sc_flags &= ~(PARF_UIO|PARF_TIMO); 269 wakeup(sc); 270 } 271 272 int 273 parwrite(dev, uio, flag) 274 dev_t dev; 275 struct uio *uio; 276 int flag; 277 { 278 279 #ifdef DEBUG 280 if (pardebug & PDB_FOLLOW) 281 printf("parwrite(%x, %p)\n", dev, uio); 282 #endif 283 return (parrw(dev, uio)); 284 } 285 286 int 287 parrw(dev, uio) 288 dev_t dev; 289 register struct uio *uio; 290 { 291 int unit = UNIT(dev); 292 register struct par_softc *sc = par_cd.cd_devs[unit]; 293 register int s, len, cnt; 294 register char *cp; 295 int error = 0; 296 int buflen; 297 char *buf; 298 299 if (!!(sc->sc_flags & PARF_OREAD) ^ (uio->uio_rw == UIO_READ)) 300 return EINVAL; 301 302 if (uio->uio_resid == 0) 303 return(0); 304 305 buflen = min(sc->sc_burst, uio->uio_resid); 306 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 307 sc->sc_flags |= PARF_UIO; 308 if (sc->sc_timo > 0) { 309 sc->sc_flags |= PARF_TIMO; 310 callout_reset(&sc->sc_timo_ch, sc->sc_timo, partimo, sc); 311 } 312 while (uio->uio_resid > 0) { 313 len = min(buflen, uio->uio_resid); 314 cp = buf; 315 if (uio->uio_rw == UIO_WRITE) { 316 error = uiomove(cp, len, uio); 317 if (error) 318 break; 319 } 320 again: 321 s = spl1(); 322 /* 323 * Check if we timed out during sleep or uiomove 324 */ 325 (void) spllowersoftclock(); 326 if ((sc->sc_flags & PARF_UIO) == 0) { 327 #ifdef DEBUG 328 if (pardebug & PDB_IO) 329 printf("parrw: uiomove/sleep timo, flags %x\n", 330 sc->sc_flags); 331 #endif 332 if (sc->sc_flags & PARF_TIMO) { 333 callout_stop(&sc->sc_timo_ch); 334 sc->sc_flags &= ~PARF_TIMO; 335 } 336 splx(s); 337 break; 338 } 339 splx(s); 340 /* 341 * Perform the operation 342 */ 343 cnt = parsend(sc, cp, len); 344 if (cnt < 0) { 345 error = -cnt; 346 break; 347 } 348 349 s = splsoftclock(); 350 /* 351 * Operation timeout (or non-blocking), quit now. 352 */ 353 if ((sc->sc_flags & PARF_UIO) == 0) { 354 #ifdef DEBUG 355 if (pardebug & PDB_IO) 356 printf("parrw: timeout/done\n"); 357 #endif 358 splx(s); 359 break; 360 } 361 /* 362 * Implement inter-read delay 363 */ 364 if (sc->sc_delay > 0) { 365 sc->sc_flags |= PARF_DELAY; 366 callout_reset(&sc->sc_start_ch, sc->sc_delay, 367 parstart, sc); 368 error = tsleep(sc, PCATCH|(PZERO-1), "par-cdelay", 0); 369 if (error) { 370 splx(s); 371 break; 372 } 373 } 374 splx(s); 375 /* 376 * Must not call uiomove again til we've used all data 377 * that we already grabbed. 378 */ 379 if (uio->uio_rw == UIO_WRITE && cnt != len) { 380 cp += cnt; 381 len -= cnt; 382 cnt = 0; 383 goto again; 384 } 385 } 386 s = splsoftclock(); 387 if (sc->sc_flags & PARF_TIMO) { 388 callout_stop(&sc->sc_timo_ch); 389 sc->sc_flags &= ~PARF_TIMO; 390 } 391 if (sc->sc_flags & PARF_DELAY) { 392 callout_stop(&sc->sc_start_ch); 393 sc->sc_flags &= ~PARF_DELAY; 394 } 395 splx(s); 396 /* 397 * Adjust for those chars that we uiomove'ed but never wrote 398 */ 399 if (uio->uio_rw == UIO_WRITE && cnt != len) { 400 uio->uio_resid += (len - cnt); 401 #ifdef DEBUG 402 if (pardebug & PDB_IO) 403 printf("parrw: short write, adjust by %d\n", 404 len-cnt); 405 #endif 406 } 407 free(buf, M_DEVBUF); 408 #ifdef DEBUG 409 if (pardebug & (PDB_FOLLOW|PDB_IO)) 410 printf("parrw: return %d, resid %d\n", error, uio->uio_resid); 411 #endif 412 return (error); 413 } 414 415 int 416 parioctl(dev, cmd, data, flag, p) 417 dev_t dev; 418 u_long cmd; 419 caddr_t data; 420 int flag; 421 struct proc *p; 422 { 423 struct par_softc *sc = par_cd.cd_devs[UNIT(dev)]; 424 struct parparam *pp, *upp; 425 int error = 0; 426 427 switch (cmd) { 428 case PARIOCGPARAM: 429 pp = &sc->sc_param; 430 upp = (struct parparam *)data; 431 upp->burst = pp->burst; 432 upp->timo = parhztoms(pp->timo); 433 upp->delay = parhztoms(pp->delay); 434 break; 435 436 case PARIOCSPARAM: 437 pp = &sc->sc_param; 438 upp = (struct parparam *)data; 439 if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX || 440 upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX) 441 return(EINVAL); 442 pp->burst = upp->burst; 443 pp->timo = parmstohz(upp->timo); 444 pp->delay = parmstohz(upp->delay); 445 break; 446 447 default: 448 return(EINVAL); 449 } 450 return (error); 451 } 452 453 int 454 parhztoms(h) 455 int h; 456 { 457 extern int hz; 458 register int m = h; 459 460 if (m > 0) 461 m = m * 1000 / hz; 462 return(m); 463 } 464 465 int 466 parmstohz(m) 467 int m; 468 { 469 extern int hz; 470 register int h = m; 471 472 if (h > 0) { 473 h = h * hz / 1000; 474 if (h == 0) 475 h = 1000 / hz; 476 } 477 return(h); 478 } 479 480 /* stuff below here if for interrupt driven output of data thru 481 the parallel port. */ 482 483 int partimeout_pending; 484 int parsend_pending; 485 486 void 487 parintr(arg) 488 void *arg; 489 { 490 int s, mask; 491 492 mask = (int)arg; 493 s = splclock(); 494 495 intio_set_sicilian_intr(intio_get_sicilian_intr() & 496 ~SICILIAN_INTR_PAR); 497 498 #ifdef DEBUG 499 if (pardebug & PDB_INTERRUPT) 500 printf ("parintr %d(%s)\n", mask, mask ? "FLG" : "tout"); 501 #endif 502 /* if invoked from timeout handler, mask will be 0, 503 * if from interrupt, it will contain the cia-icr mask, 504 * which is != 0 505 */ 506 if (mask) { 507 if (partimeout_pending) 508 callout_stop(&intr_callout); 509 if (parsend_pending) 510 parsend_pending = 0; 511 } 512 513 /* either way, there won't be a timeout pending any longer */ 514 partimeout_pending = 0; 515 516 wakeup(parintr); 517 splx (s); 518 } 519 520 int 521 parsendch(sc, ch) 522 struct par_softc *sc; 523 u_char ch; 524 { 525 int error = 0; 526 int s; 527 528 /* if either offline, busy or out of paper, wait for that 529 condition to clear */ 530 s = spl1(); 531 while (!error 532 && (parsend_pending 533 || !(intio_get_sicilian_intr() & SICILIAN_STAT_PAR))) 534 { 535 extern int hz; 536 537 /* wait a second, and try again */ 538 callout_reset(&intr_callout, hz, parintr, 0); 539 partimeout_pending = 1; 540 /* this is essentially a flipflop to have us wait for the 541 first character being transmitted when trying to transmit 542 the second, etc. */ 543 parsend_pending = 0; 544 /* it's quite important that a parallel putc can be 545 interrupted, given the possibility to lock a printer 546 in an offline condition.. */ 547 if ((error = tsleep (parintr, PCATCH|(PZERO-1), "parsendch", 0))) { 548 #ifdef DEBUG 549 if (pardebug & PDB_INTERRUPT) 550 printf ("parsendch interrupted, error = %d\n", error); 551 #endif 552 if (partimeout_pending) 553 callout_stop(&intr_callout); 554 555 partimeout_pending = 0; 556 } 557 } 558 559 if (!error) { 560 #ifdef DEBUG 561 if (pardebug & PDB_INTERRUPT) 562 printf ("#%d", ch); 563 #endif 564 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_DATA, ch); 565 DELAY(1); /* (DELAY(1) == 1us) > 0.5us */ 566 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_STROBE, 0); 567 intio_set_sicilian_intr (intio_get_sicilian_intr() | 568 SICILIAN_INTR_PAR); 569 DELAY(1); 570 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_STROBE, 1); 571 parsend_pending = 1; 572 } 573 574 splx (s); 575 576 return error; 577 } 578 579 580 int 581 parsend(sc, buf, len) 582 struct par_softc *sc; 583 u_char *buf; 584 int len; 585 { 586 int err, orig_len = len; 587 588 for (; len; len--, buf++) 589 if ((err = parsendch (sc, *buf))) 590 return err < 0 ? -EINTR : -err; 591 592 /* either all or nothing.. */ 593 return orig_len; 594 } 595
Indexes created Mon Oct 20 16:09:52 GMT 2025