par.c revision 1.9.2.1
1 /* $NetBSD: par.c,v 1.9.2.1 2000/11/20 20:30:02 bouyer 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 cdev_decl(par); 113 114 int parmatch __P((struct device *, struct cfdata *, void *)); 115 void parattach __P((struct device *, struct device *, void *)); 116 117 struct cfattach par_ca = { 118 sizeof(struct par_softc), parmatch, parattach 119 }; 120 121 extern struct cfdriver par_cd; 122 123 int 124 parmatch(pdp, cfp, aux) 125 struct device *pdp; 126 struct cfdata *cfp; 127 void *aux; 128 { 129 struct intio_attach_args *ia = aux; 130 131 /* X680x0 has only one parallel port */ 132 if (strcmp(ia->ia_name, "par") || cfp->cf_unit > 0) 133 return 0; 134 135 if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) 136 ia->ia_addr = 0xe8c000; 137 ia->ia_size = 0x2000; 138 if (intio_map_allocate_region (pdp, ia, INTIO_MAP_TESTONLY)) 139 return 0; 140 if (ia->ia_intr == INTIOCF_INTR_DEFAULT) 141 ia->ia_intr = 99; 142 #if DIAGNOSTIC 143 if (ia->ia_intr != 99) 144 return 0; 145 #endif 146 147 return 1; 148 } 149 150 void 151 parattach(pdp, dp, aux) 152 struct device *pdp, *dp; 153 void *aux; 154 { 155 register struct par_softc *sc = (struct par_softc *)dp; 156 struct intio_attach_args *ia = aux; 157 int r; 158 159 sc->sc_flags = PARF_ALIVE; 160 printf(": parallel port (write only, interrupt)\n"); 161 ia->ia_size = 0x2000; 162 r = intio_map_allocate_region (pdp, ia, INTIO_MAP_ALLOCATE); 163 #ifdef DIAGNOSTIC 164 if (r) 165 panic ("IO map for PAR corruption??"); 166 #endif 167 sc->sc_bst = ia->ia_bst; 168 r = bus_space_map (sc->sc_bst, 169 ia->ia_addr, ia->ia_size, 170 BUS_SPACE_MAP_SHIFTED, 171 &sc->sc_bsh); 172 #ifdef DIAGNOSTIC 173 if (r) 174 panic ("Cannot map IO space for PAR."); 175 #endif 176 177 intio_set_sicilian_intr(intio_get_sicilian_intr() & 178 ~SICILIAN_INTR_PAR); 179 180 intio_intr_establish(ia->ia_intr, "par", 181 (intio_intr_handler_t) parintr, (void*) 1); 182 183 callout_init(&sc->sc_timo_ch); 184 callout_init(&sc->sc_start_ch); 185 } 186 187 int 188 paropen(dev, flags, mode, p) 189 dev_t dev; 190 int flags, mode; 191 struct proc *p; 192 { 193 register int unit = UNIT(dev); 194 register struct par_softc *sc; 195 196 if (unit != 0) 197 return(ENXIO); 198 sc = par_cd.cd_devs[unit]; 199 if (!(sc->sc_flags & PARF_ALIVE)) 200 return(ENXIO); 201 if (sc->sc_flags & PARF_OPEN) 202 return(EBUSY); 203 /* X680x0 can't read */ 204 if ((flags & FREAD) == FREAD) 205 return (EINVAL); 206 207 sc->sc_flags |= PARF_OPEN; 208 209 sc->sc_flags |= PARF_OWRITE; 210 211 sc->sc_burst = PAR_BURST; 212 sc->sc_timo = parmstohz(PAR_TIMO); 213 sc->sc_delay = parmstohz(PAR_DELAY); 214 215 return(0); 216 } 217 218 int 219 parclose(dev, flags, mode, p) 220 dev_t dev; 221 int flags, mode; 222 struct proc *p; 223 { 224 int unit = UNIT(dev); 225 int s; 226 struct par_softc *sc = par_cd.cd_devs[unit]; 227 228 sc->sc_flags &= ~(PARF_OPEN|PARF_OWRITE); 229 230 /* don't allow interrupts any longer */ 231 s = spl1(); 232 intio_set_sicilian_intr(intio_get_sicilian_intr() & 233 ~SICILIAN_INTR_PAR); 234 splx(s); 235 236 return (0); 237 } 238 239 void 240 parstart(arg) 241 void *arg; 242 { 243 struct par_softc *sc = arg; 244 #ifdef DEBUG 245 if (pardebug & PDB_FOLLOW) 246 printf("parstart(%x)\n", sc->sc_dev.dv_unit); 247 #endif 248 sc->sc_flags &= ~PARF_DELAY; 249 wakeup(sc); 250 } 251 252 void 253 partimo(arg) 254 void *arg; 255 { 256 struct par_softc *sc = arg; 257 #ifdef DEBUG 258 if (pardebug & PDB_FOLLOW) 259 printf("partimo(%x)\n", sc->sc_dev.dv_unit); 260 #endif 261 sc->sc_flags &= ~(PARF_UIO|PARF_TIMO); 262 wakeup(sc); 263 } 264 265 int 266 parwrite(dev, uio, flag) 267 dev_t dev; 268 struct uio *uio; 269 int flag; 270 { 271 272 #ifdef DEBUG 273 if (pardebug & PDB_FOLLOW) 274 printf("parwrite(%x, %p)\n", dev, uio); 275 #endif 276 return (parrw(dev, uio)); 277 } 278 279 int 280 parrw(dev, uio) 281 dev_t dev; 282 register struct uio *uio; 283 { 284 int unit = UNIT(dev); 285 register struct par_softc *sc = par_cd.cd_devs[unit]; 286 register int s, len, cnt; 287 register char *cp; 288 int error = 0; 289 int buflen; 290 char *buf; 291 292 if (!!(sc->sc_flags & PARF_OREAD) ^ (uio->uio_rw == UIO_READ)) 293 return EINVAL; 294 295 if (uio->uio_resid == 0) 296 return(0); 297 298 buflen = min(sc->sc_burst, uio->uio_resid); 299 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 300 sc->sc_flags |= PARF_UIO; 301 if (sc->sc_timo > 0) { 302 sc->sc_flags |= PARF_TIMO; 303 callout_reset(&sc->sc_timo_ch, sc->sc_timo, partimo, sc); 304 } 305 while (uio->uio_resid > 0) { 306 len = min(buflen, uio->uio_resid); 307 cp = buf; 308 if (uio->uio_rw == UIO_WRITE) { 309 error = uiomove(cp, len, uio); 310 if (error) 311 break; 312 } 313 again: 314 s = spl1(); 315 /* 316 * Check if we timed out during sleep or uiomove 317 */ 318 (void) spllowersoftclock(); 319 if ((sc->sc_flags & PARF_UIO) == 0) { 320 #ifdef DEBUG 321 if (pardebug & PDB_IO) 322 printf("parrw: uiomove/sleep timo, flags %x\n", 323 sc->sc_flags); 324 #endif 325 if (sc->sc_flags & PARF_TIMO) { 326 callout_stop(&sc->sc_timo_ch); 327 sc->sc_flags &= ~PARF_TIMO; 328 } 329 splx(s); 330 break; 331 } 332 splx(s); 333 /* 334 * Perform the operation 335 */ 336 cnt = parsend(sc, cp, len); 337 if (cnt < 0) { 338 error = -cnt; 339 break; 340 } 341 342 s = splsoftclock(); 343 /* 344 * Operation timeout (or non-blocking), quit now. 345 */ 346 if ((sc->sc_flags & PARF_UIO) == 0) { 347 #ifdef DEBUG 348 if (pardebug & PDB_IO) 349 printf("parrw: timeout/done\n"); 350 #endif 351 splx(s); 352 break; 353 } 354 /* 355 * Implement inter-read delay 356 */ 357 if (sc->sc_delay > 0) { 358 sc->sc_flags |= PARF_DELAY; 359 callout_reset(&sc->sc_start_ch, sc->sc_delay, 360 parstart, sc); 361 error = tsleep(sc, PCATCH|(PZERO-1), "par-cdelay", 0); 362 if (error) { 363 splx(s); 364 break; 365 } 366 } 367 splx(s); 368 /* 369 * Must not call uiomove again til we've used all data 370 * that we already grabbed. 371 */ 372 if (uio->uio_rw == UIO_WRITE && cnt != len) { 373 cp += cnt; 374 len -= cnt; 375 cnt = 0; 376 goto again; 377 } 378 } 379 s = splsoftclock(); 380 if (sc->sc_flags & PARF_TIMO) { 381 callout_stop(&sc->sc_timo_ch); 382 sc->sc_flags &= ~PARF_TIMO; 383 } 384 if (sc->sc_flags & PARF_DELAY) { 385 callout_stop(&sc->sc_start_ch); 386 sc->sc_flags &= ~PARF_DELAY; 387 } 388 splx(s); 389 /* 390 * Adjust for those chars that we uiomove'ed but never wrote 391 */ 392 if (uio->uio_rw == UIO_WRITE && cnt != len) { 393 uio->uio_resid += (len - cnt); 394 #ifdef DEBUG 395 if (pardebug & PDB_IO) 396 printf("parrw: short write, adjust by %d\n", 397 len-cnt); 398 #endif 399 } 400 free(buf, M_DEVBUF); 401 #ifdef DEBUG 402 if (pardebug & (PDB_FOLLOW|PDB_IO)) 403 printf("parrw: return %d, resid %d\n", error, uio->uio_resid); 404 #endif 405 return (error); 406 } 407 408 int 409 parioctl(dev, cmd, data, flag, p) 410 dev_t dev; 411 u_long cmd; 412 caddr_t data; 413 int flag; 414 struct proc *p; 415 { 416 struct par_softc *sc = par_cd.cd_devs[UNIT(dev)]; 417 struct parparam *pp, *upp; 418 int error = 0; 419 420 switch (cmd) { 421 case PARIOCGPARAM: 422 pp = &sc->sc_param; 423 upp = (struct parparam *)data; 424 upp->burst = pp->burst; 425 upp->timo = parhztoms(pp->timo); 426 upp->delay = parhztoms(pp->delay); 427 break; 428 429 case PARIOCSPARAM: 430 pp = &sc->sc_param; 431 upp = (struct parparam *)data; 432 if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX || 433 upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX) 434 return(EINVAL); 435 pp->burst = upp->burst; 436 pp->timo = parmstohz(upp->timo); 437 pp->delay = parmstohz(upp->delay); 438 break; 439 440 default: 441 return(EINVAL); 442 } 443 return (error); 444 } 445 446 int 447 parhztoms(h) 448 int h; 449 { 450 extern int hz; 451 register int m = h; 452 453 if (m > 0) 454 m = m * 1000 / hz; 455 return(m); 456 } 457 458 int 459 parmstohz(m) 460 int m; 461 { 462 extern int hz; 463 register int h = m; 464 465 if (h > 0) { 466 h = h * hz / 1000; 467 if (h == 0) 468 h = 1000 / hz; 469 } 470 return(h); 471 } 472 473 /* stuff below here if for interrupt driven output of data thru 474 the parallel port. */ 475 476 int partimeout_pending; 477 int parsend_pending; 478 479 void 480 parintr(arg) 481 void *arg; 482 { 483 int s, mask; 484 485 mask = (int)arg; 486 s = splclock(); 487 488 intio_set_sicilian_intr(intio_get_sicilian_intr() & 489 ~SICILIAN_INTR_PAR); 490 491 #ifdef DEBUG 492 if (pardebug & PDB_INTERRUPT) 493 printf ("parintr %d(%s)\n", mask, mask ? "FLG" : "tout"); 494 #endif 495 /* if invoked from timeout handler, mask will be 0, 496 * if from interrupt, it will contain the cia-icr mask, 497 * which is != 0 498 */ 499 if (mask) { 500 if (partimeout_pending) 501 callout_stop(&intr_callout); 502 if (parsend_pending) 503 parsend_pending = 0; 504 } 505 506 /* either way, there won't be a timeout pending any longer */ 507 partimeout_pending = 0; 508 509 wakeup(parintr); 510 splx (s); 511 } 512 513 int 514 parsendch(sc, ch) 515 struct par_softc *sc; 516 u_char ch; 517 { 518 int error = 0; 519 int s; 520 521 /* if either offline, busy or out of paper, wait for that 522 condition to clear */ 523 s = spl1(); 524 while (!error 525 && (parsend_pending 526 || !(intio_get_sicilian_intr() & SICILIAN_STAT_PAR))) 527 { 528 extern int hz; 529 530 /* wait a second, and try again */ 531 callout_reset(&intr_callout, hz, parintr, 0); 532 partimeout_pending = 1; 533 /* this is essentially a flipflop to have us wait for the 534 first character being transmitted when trying to transmit 535 the second, etc. */ 536 parsend_pending = 0; 537 /* it's quite important that a parallel putc can be 538 interrupted, given the possibility to lock a printer 539 in an offline condition.. */ 540 if ((error = tsleep (parintr, PCATCH|(PZERO-1), "parsendch", 0))) { 541 #ifdef DEBUG 542 if (pardebug & PDB_INTERRUPT) 543 printf ("parsendch interrupted, error = %d\n", error); 544 #endif 545 if (partimeout_pending) 546 callout_stop(&intr_callout); 547 548 partimeout_pending = 0; 549 } 550 } 551 552 if (!error) { 553 #ifdef DEBUG 554 if (pardebug & PDB_INTERRUPT) 555 printf ("#%d", ch); 556 #endif 557 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_DATA, ch); 558 DELAY(1); /* (DELAY(1) == 1us) > 0.5us */ 559 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_STROBE, 0); 560 intio_set_sicilian_intr (intio_get_sicilian_intr() | 561 SICILIAN_INTR_PAR); 562 DELAY(1); 563 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_STROBE, 1); 564 parsend_pending = 1; 565 } 566 567 splx (s); 568 569 return error; 570 } 571 572 573 int 574 parsend(sc, buf, len) 575 struct par_softc *sc; 576 u_char *buf; 577 int len; 578 { 579 int err, orig_len = len; 580 581 for (; len; len--, buf++) 582 if ((err = parsendch (sc, *buf))) 583 return err < 0 ? -EINTR : -err; 584 585 /* either all or nothing.. */ 586 return orig_len; 587 } 588
Indexes created Wed Oct 15 16:09:53 GMT 2025