par.c revision 1.19
1 /* $NetBSD: par.c,v 1.19 2003/08/07 16:30:25 agc 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)ppi.c 7.3 (Berkeley) 12/16/90 32 */ 33 34 /* 35 * parallel port interface 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: par.c,v 1.19 2003/08/07 16:30:25 agc Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/errno.h> 43 #include <sys/uio.h> 44 #include <sys/device.h> 45 #include <sys/malloc.h> 46 #include <sys/file.h> 47 #include <sys/systm.h> 48 #include <sys/callout.h> 49 #include <sys/proc.h> 50 #include <sys/conf.h> 51 52 #include <machine/bus.h> 53 #include <machine/cpu.h> 54 #include <machine/parioctl.h> 55 56 #include <arch/x68k/dev/intiovar.h> 57 58 struct par_softc { 59 struct device sc_dev; 60 61 bus_space_tag_t sc_bst; 62 bus_space_handle_t sc_bsh; 63 int sc_flags; 64 struct parparam sc_param; 65 #define sc_burst sc_param.burst 66 #define sc_timo sc_param.timo 67 #define sc_delay sc_param.delay 68 struct callout sc_timo_ch; 69 struct callout sc_start_ch; 70 } ; 71 72 /* par registers */ 73 #define PAR_DATA 1 74 #define PAR_STROBE 3 75 76 /* sc_flags values */ 77 #define PARF_ALIVE 0x01 78 #define PARF_OPEN 0x02 79 #define PARF_UIO 0x04 80 #define PARF_TIMO 0x08 81 #define PARF_DELAY 0x10 82 #define PARF_OREAD 0x40 /* no support */ 83 #define PARF_OWRITE 0x80 84 85 86 void partimo __P((void *)); 87 void parstart __P((void *);) 88 void parintr __P((void *)); 89 int parrw __P((dev_t, struct uio *)); 90 int parhztoms __P((int)); 91 int parmstohz __P((int)); 92 int parsendch __P((struct par_softc*, u_char)); 93 int parsend __P((struct par_softc*, u_char *, int)); 94 95 static struct callout intr_callout = CALLOUT_INITIALIZER; 96 97 #define UNIT(x) minor(x) 98 99 #ifdef DEBUG 100 #define PDB_FOLLOW 0x01 101 #define PDB_IO 0x02 102 #define PDB_INTERRUPT 0x04 103 #define PDB_NOCHECK 0x80 104 #ifdef PARDEBUG 105 int pardebug = PDB_FOLLOW | PDB_IO | PDB_INTERRUPT; 106 #else 107 int pardebug = 0; 108 #endif 109 #endif 110 111 int parmatch __P((struct device *, struct cfdata *, void *)); 112 void parattach __P((struct device *, struct device *, void *)); 113 114 CFATTACH_DECL(par, sizeof(struct par_softc), 115 parmatch, parattach, NULL, NULL); 116 117 extern struct cfdriver par_cd; 118 119 dev_type_open(paropen); 120 dev_type_close(parclose); 121 dev_type_write(parwrite); 122 dev_type_ioctl(parioctl); 123 124 const struct cdevsw par_cdevsw = { 125 paropen, parclose, noread, parwrite, parioctl, 126 nostop, notty, nopoll, nommap, nokqfilter, 127 }; 128 129 int 130 parmatch(pdp, cfp, aux) 131 struct device *pdp; 132 struct cfdata *cfp; 133 void *aux; 134 { 135 struct intio_attach_args *ia = aux; 136 137 /* X680x0 has only one parallel port */ 138 if (strcmp(ia->ia_name, "par") || cfp->cf_unit > 0) 139 return 0; 140 141 if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) 142 ia->ia_addr = 0xe8c000; 143 ia->ia_size = 0x2000; 144 if (intio_map_allocate_region (pdp, ia, INTIO_MAP_TESTONLY)) 145 return 0; 146 if (ia->ia_intr == INTIOCF_INTR_DEFAULT) 147 ia->ia_intr = 99; 148 #if DIAGNOSTIC 149 if (ia->ia_intr != 99) 150 return 0; 151 #endif 152 153 return 1; 154 } 155 156 void 157 parattach(pdp, dp, aux) 158 struct device *pdp, *dp; 159 void *aux; 160 { 161 register struct par_softc *sc = (struct par_softc *)dp; 162 struct intio_attach_args *ia = aux; 163 int r; 164 165 sc->sc_flags = PARF_ALIVE; 166 printf(": parallel port (write only, interrupt)\n"); 167 ia->ia_size = 0x2000; 168 r = intio_map_allocate_region (pdp, ia, INTIO_MAP_ALLOCATE); 169 #ifdef DIAGNOSTIC 170 if (r) 171 panic ("IO map for PAR corruption??"); 172 #endif 173 sc->sc_bst = ia->ia_bst; 174 r = bus_space_map (sc->sc_bst, 175 ia->ia_addr, ia->ia_size, 176 BUS_SPACE_MAP_SHIFTED, 177 &sc->sc_bsh); 178 #ifdef DIAGNOSTIC 179 if (r) 180 panic ("Cannot map IO space for PAR."); 181 #endif 182 183 intio_set_sicilian_intr(intio_get_sicilian_intr() & 184 ~SICILIAN_INTR_PAR); 185 186 intio_intr_establish(ia->ia_intr, "par", 187 (intio_intr_handler_t) parintr, (void*) 1); 188 189 callout_init(&sc->sc_timo_ch); 190 callout_init(&sc->sc_start_ch); 191 } 192 193 int 194 paropen(dev, flags, mode, p) 195 dev_t dev; 196 int flags, mode; 197 struct proc *p; 198 { 199 register int unit = UNIT(dev); 200 register struct par_softc *sc; 201 202 if (unit != 0) 203 return(ENXIO); 204 sc = par_cd.cd_devs[unit]; 205 if (!(sc->sc_flags & PARF_ALIVE)) 206 return(ENXIO); 207 if (sc->sc_flags & PARF_OPEN) 208 return(EBUSY); 209 /* X680x0 can't read */ 210 if ((flags & FREAD) == FREAD) 211 return (EINVAL); 212 213 sc->sc_flags |= PARF_OPEN; 214 215 sc->sc_flags |= PARF_OWRITE; 216 217 sc->sc_burst = PAR_BURST; 218 sc->sc_timo = parmstohz(PAR_TIMO); 219 sc->sc_delay = parmstohz(PAR_DELAY); 220 221 return(0); 222 } 223 224 int 225 parclose(dev, flags, mode, p) 226 dev_t dev; 227 int flags, mode; 228 struct proc *p; 229 { 230 int unit = UNIT(dev); 231 int s; 232 struct par_softc *sc = par_cd.cd_devs[unit]; 233 234 sc->sc_flags &= ~(PARF_OPEN|PARF_OWRITE); 235 236 /* don't allow interrupts any longer */ 237 s = spl1(); 238 intio_set_sicilian_intr(intio_get_sicilian_intr() & 239 ~SICILIAN_INTR_PAR); 240 splx(s); 241 242 return (0); 243 } 244 245 void 246 parstart(arg) 247 void *arg; 248 { 249 struct par_softc *sc = arg; 250 #ifdef DEBUG 251 if (pardebug & PDB_FOLLOW) 252 printf("parstart(%x)\n", sc->sc_dev.dv_unit); 253 #endif 254 sc->sc_flags &= ~PARF_DELAY; 255 wakeup(sc); 256 } 257 258 void 259 partimo(arg) 260 void *arg; 261 { 262 struct par_softc *sc = arg; 263 #ifdef DEBUG 264 if (pardebug & PDB_FOLLOW) 265 printf("partimo(%x)\n", sc->sc_dev.dv_unit); 266 #endif 267 sc->sc_flags &= ~(PARF_UIO|PARF_TIMO); 268 wakeup(sc); 269 } 270 271 int 272 parwrite(dev, uio, flag) 273 dev_t dev; 274 struct uio *uio; 275 int flag; 276 { 277 278 #ifdef DEBUG 279 if (pardebug & PDB_FOLLOW) 280 printf("parwrite(%x, %p)\n", dev, uio); 281 #endif 282 return (parrw(dev, uio)); 283 } 284 285 int 286 parrw(dev, uio) 287 dev_t dev; 288 register struct uio *uio; 289 { 290 int unit = UNIT(dev); 291 register struct par_softc *sc = par_cd.cd_devs[unit]; 292 register int s, len, cnt; 293 register char *cp; 294 int error = 0; 295 int buflen; 296 char *buf; 297 298 if (!!(sc->sc_flags & PARF_OREAD) ^ (uio->uio_rw == UIO_READ)) 299 return EINVAL; 300 301 if (uio->uio_resid == 0) 302 return(0); 303 304 buflen = min(sc->sc_burst, uio->uio_resid); 305 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 306 sc->sc_flags |= PARF_UIO; 307 if (sc->sc_timo > 0) { 308 sc->sc_flags |= PARF_TIMO; 309 callout_reset(&sc->sc_timo_ch, sc->sc_timo, partimo, sc); 310 } 311 while (uio->uio_resid > 0) { 312 len = min(buflen, uio->uio_resid); 313 cp = buf; 314 if (uio->uio_rw == UIO_WRITE) { 315 error = uiomove(cp, len, uio); 316 if (error) 317 break; 318 } 319 again: 320 s = spl1(); 321 /* 322 * Check if we timed out during sleep or uiomove 323 */ 324 (void) spllowersoftclock(); 325 if ((sc->sc_flags & PARF_UIO) == 0) { 326 #ifdef DEBUG 327 if (pardebug & PDB_IO) 328 printf("parrw: uiomove/sleep timo, flags %x\n", 329 sc->sc_flags); 330 #endif 331 if (sc->sc_flags & PARF_TIMO) { 332 callout_stop(&sc->sc_timo_ch); 333 sc->sc_flags &= ~PARF_TIMO; 334 } 335 splx(s); 336 break; 337 } 338 splx(s); 339 /* 340 * Perform the operation 341 */ 342 cnt = parsend(sc, cp, len); 343 if (cnt < 0) { 344 error = -cnt; 345 break; 346 } 347 348 s = splsoftclock(); 349 /* 350 * Operation timeout (or non-blocking), quit now. 351 */ 352 if ((sc->sc_flags & PARF_UIO) == 0) { 353 #ifdef DEBUG 354 if (pardebug & PDB_IO) 355 printf("parrw: timeout/done\n"); 356 #endif 357 splx(s); 358 break; 359 } 360 /* 361 * Implement inter-read delay 362 */ 363 if (sc->sc_delay > 0) { 364 sc->sc_flags |= PARF_DELAY; 365 callout_reset(&sc->sc_start_ch, sc->sc_delay, 366 parstart, sc); 367 error = tsleep(sc, PCATCH|(PZERO-1), "par-cdelay", 0); 368 if (error) { 369 splx(s); 370 break; 371 } 372 } 373 splx(s); 374 /* 375 * Must not call uiomove again til we've used all data 376 * that we already grabbed. 377 */ 378 if (uio->uio_rw == UIO_WRITE && cnt != len) { 379 cp += cnt; 380 len -= cnt; 381 cnt = 0; 382 goto again; 383 } 384 } 385 s = splsoftclock(); 386 if (sc->sc_flags & PARF_TIMO) { 387 callout_stop(&sc->sc_timo_ch); 388 sc->sc_flags &= ~PARF_TIMO; 389 } 390 if (sc->sc_flags & PARF_DELAY) { 391 callout_stop(&sc->sc_start_ch); 392 sc->sc_flags &= ~PARF_DELAY; 393 } 394 splx(s); 395 /* 396 * Adjust for those chars that we uiomove'ed but never wrote 397 */ 398 if (uio->uio_rw == UIO_WRITE && cnt != len) { 399 uio->uio_resid += (len - cnt); 400 #ifdef DEBUG 401 if (pardebug & PDB_IO) 402 printf("parrw: short write, adjust by %d\n", 403 len-cnt); 404 #endif 405 } 406 free(buf, M_DEVBUF); 407 #ifdef DEBUG 408 if (pardebug & (PDB_FOLLOW|PDB_IO)) 409 printf("parrw: return %d, resid %d\n", error, uio->uio_resid); 410 #endif 411 return (error); 412 } 413 414 int 415 parioctl(dev, cmd, data, flag, p) 416 dev_t dev; 417 u_long cmd; 418 caddr_t data; 419 int flag; 420 struct proc *p; 421 { 422 struct par_softc *sc = par_cd.cd_devs[UNIT(dev)]; 423 struct parparam *pp, *upp; 424 int error = 0; 425 426 switch (cmd) { 427 case PARIOCGPARAM: 428 pp = &sc->sc_param; 429 upp = (struct parparam *)data; 430 upp->burst = pp->burst; 431 upp->timo = parhztoms(pp->timo); 432 upp->delay = parhztoms(pp->delay); 433 break; 434 435 case PARIOCSPARAM: 436 pp = &sc->sc_param; 437 upp = (struct parparam *)data; 438 if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX || 439 upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX) 440 return(EINVAL); 441 pp->burst = upp->burst; 442 pp->timo = parmstohz(upp->timo); 443 pp->delay = parmstohz(upp->delay); 444 break; 445 446 default: 447 return(EINVAL); 448 } 449 return (error); 450 } 451 452 int 453 parhztoms(h) 454 int h; 455 { 456 extern int hz; 457 register int m = h; 458 459 if (m > 0) 460 m = m * 1000 / hz; 461 return(m); 462 } 463 464 int 465 parmstohz(m) 466 int m; 467 { 468 extern int hz; 469 register int h = m; 470 471 if (h > 0) { 472 h = h * hz / 1000; 473 if (h == 0) 474 h = 1000 / hz; 475 } 476 return(h); 477 } 478 479 /* stuff below here if for interrupt driven output of data thru 480 the parallel port. */ 481 482 int partimeout_pending; 483 int parsend_pending; 484 485 void 486 parintr(arg) 487 void *arg; 488 { 489 int s, mask; 490 491 mask = (int)arg; 492 s = splclock(); 493 494 intio_set_sicilian_intr(intio_get_sicilian_intr() & 495 ~SICILIAN_INTR_PAR); 496 497 #ifdef DEBUG 498 if (pardebug & PDB_INTERRUPT) 499 printf ("parintr %d(%s)\n", mask, mask ? "FLG" : "tout"); 500 #endif 501 /* if invoked from timeout handler, mask will be 0, 502 * if from interrupt, it will contain the cia-icr mask, 503 * which is != 0 504 */ 505 if (mask) { 506 if (partimeout_pending) 507 callout_stop(&intr_callout); 508 if (parsend_pending) 509 parsend_pending = 0; 510 } 511 512 /* either way, there won't be a timeout pending any longer */ 513 partimeout_pending = 0; 514 515 wakeup(parintr); 516 splx (s); 517 } 518 519 int 520 parsendch(sc, ch) 521 struct par_softc *sc; 522 u_char ch; 523 { 524 int error = 0; 525 int s; 526 527 /* if either offline, busy or out of paper, wait for that 528 condition to clear */ 529 s = spl1(); 530 while (!error 531 && (parsend_pending 532 || !(intio_get_sicilian_intr() & SICILIAN_STAT_PAR))) 533 { 534 extern int hz; 535 536 /* wait a second, and try again */ 537 callout_reset(&intr_callout, hz, parintr, 0); 538 partimeout_pending = 1; 539 /* this is essentially a flipflop to have us wait for the 540 first character being transmitted when trying to transmit 541 the second, etc. */ 542 parsend_pending = 0; 543 /* it's quite important that a parallel putc can be 544 interrupted, given the possibility to lock a printer 545 in an offline condition.. */ 546 if ((error = tsleep (parintr, PCATCH|(PZERO-1), "parsendch", 0))) { 547 #ifdef DEBUG 548 if (pardebug & PDB_INTERRUPT) 549 printf ("parsendch interrupted, error = %d\n", error); 550 #endif 551 if (partimeout_pending) 552 callout_stop(&intr_callout); 553 554 partimeout_pending = 0; 555 } 556 } 557 558 if (!error) { 559 #ifdef DEBUG 560 if (pardebug & PDB_INTERRUPT) 561 printf ("#%d", ch); 562 #endif 563 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_DATA, ch); 564 DELAY(1); /* (DELAY(1) == 1us) > 0.5us */ 565 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_STROBE, 0); 566 intio_set_sicilian_intr (intio_get_sicilian_intr() | 567 SICILIAN_INTR_PAR); 568 DELAY(1); 569 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_STROBE, 1); 570 parsend_pending = 1; 571 } 572 573 splx (s); 574 575 return error; 576 } 577 578 579 int 580 parsend(sc, buf, len) 581 struct par_softc *sc; 582 u_char *buf; 583 int len; 584 { 585 int err, orig_len = len; 586 587 for (; len; len--, buf++) 588 if ((err = parsendch (sc, *buf))) 589 return err < 0 ? -EINTR : -err; 590 591 /* either all or nothing.. */ 592 return orig_len; 593 } 594
Indexes created Thu Oct 16 14:10:15 GMT 2025