par.c revision 1.11
1 /* $NetBSD: par.c,v 1.11 2000/03/27 15:53:04 minoura 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; 140 141 return 1; 142 } 143 144 void 145 parattach(pdp, dp, aux) 146 struct device *pdp, *dp; 147 void *aux; 148 { 149 register struct par_softc *sc = (struct par_softc *)dp; 150 struct intio_attach_args *ia = aux; 151 int r; 152 153 sc->sc_flags = PARF_ALIVE; 154 printf(": parallel port (write only, interrupt)\n"); 155 ia->ia_size = 0x2000; 156 r = intio_map_allocate_region (pdp, ia, INTIO_MAP_ALLOCATE); 157 #ifdef DIAGNOSTIC 158 if (r) 159 panic ("IO map for PAR corruption??"); 160 #endif 161 sc->sc_bst = ia->ia_bst; 162 r = bus_space_map (sc->sc_bst, 163 ia->ia_addr, ia->ia_size, 164 BUS_SPACE_MAP_SHIFTED, 165 &sc->sc_bsh); 166 #ifdef DIAGNOSTIC 167 if (r) 168 panic ("Cannot map IO space for PAR."); 169 #endif 170 171 intio_set_sicilian_intr(intio_get_sicilian_intr() & 172 ~SICILIAN_INTR_PAR); 173 174 callout_init(&sc->sc_timo_ch); 175 callout_init(&sc->sc_start_ch); 176 } 177 178 int 179 paropen(dev, flags, mode, p) 180 dev_t dev; 181 int flags, mode; 182 struct proc *p; 183 { 184 register int unit = UNIT(dev); 185 register struct par_softc *sc; 186 187 if (unit != 0) 188 return(ENXIO); 189 sc = par_cd.cd_devs[unit]; 190 if (!(sc->sc_flags & PARF_ALIVE)) 191 return(ENXIO); 192 if (sc->sc_flags & PARF_OPEN) 193 return(EBUSY); 194 /* X680x0 can't read */ 195 if ((flags & FREAD) == FREAD) 196 return (EINVAL); 197 198 sc->sc_flags |= PARF_OPEN; 199 200 sc->sc_flags |= PARF_OWRITE; 201 202 sc->sc_burst = PAR_BURST; 203 sc->sc_timo = parmstohz(PAR_TIMO); 204 sc->sc_delay = parmstohz(PAR_DELAY); 205 206 return(0); 207 } 208 209 int 210 parclose(dev, flags, mode, p) 211 dev_t dev; 212 int flags, mode; 213 struct proc *p; 214 { 215 int unit = UNIT(dev); 216 int s; 217 struct par_softc *sc = par_cd.cd_devs[unit]; 218 219 sc->sc_flags &= ~(PARF_OPEN|PARF_OWRITE); 220 221 /* don't allow interrupts any longer */ 222 s = spl1(); 223 intio_set_sicilian_intr(intio_get_sicilian_intr() & 224 ~SICILIAN_INTR_PAR); 225 splx(s); 226 227 return (0); 228 } 229 230 void 231 parstart(arg) 232 void *arg; 233 { 234 struct par_softc *sc = arg; 235 #ifdef DEBUG 236 if (pardebug & PDB_FOLLOW) 237 printf("parstart(%x)\n", sc->sc_dev.dv_unit); 238 #endif 239 sc->sc_flags &= ~PARF_DELAY; 240 wakeup(sc); 241 } 242 243 void 244 partimo(arg) 245 void *arg; 246 { 247 struct par_softc *sc = arg; 248 #ifdef DEBUG 249 if (pardebug & PDB_FOLLOW) 250 printf("partimo(%x)\n", sc->sc_dev.dv_unit); 251 #endif 252 sc->sc_flags &= ~(PARF_UIO|PARF_TIMO); 253 wakeup(sc); 254 } 255 256 int 257 parwrite(dev, uio, flag) 258 dev_t dev; 259 struct uio *uio; 260 int flag; 261 { 262 263 #ifdef DEBUG 264 if (pardebug & PDB_FOLLOW) 265 printf("parwrite(%x, %p)\n", dev, uio); 266 #endif 267 return (parrw(dev, uio)); 268 } 269 270 int 271 parrw(dev, uio) 272 dev_t dev; 273 register struct uio *uio; 274 { 275 int unit = UNIT(dev); 276 register struct par_softc *sc = par_cd.cd_devs[unit]; 277 register int s, len, cnt; 278 register char *cp; 279 int error = 0; 280 int buflen; 281 char *buf; 282 283 if (!!(sc->sc_flags & PARF_OREAD) ^ (uio->uio_rw == UIO_READ)) 284 return EINVAL; 285 286 if (uio->uio_resid == 0) 287 return(0); 288 289 buflen = min(sc->sc_burst, uio->uio_resid); 290 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 291 sc->sc_flags |= PARF_UIO; 292 if (sc->sc_timo > 0) { 293 sc->sc_flags |= PARF_TIMO; 294 callout_reset(&sc->sc_timo_ch, sc->sc_timo, partimo, sc); 295 } 296 while (uio->uio_resid > 0) { 297 len = min(buflen, uio->uio_resid); 298 cp = buf; 299 if (uio->uio_rw == UIO_WRITE) { 300 error = uiomove(cp, len, uio); 301 if (error) 302 break; 303 } 304 again: 305 s = spl1(); 306 /* 307 * Check if we timed out during sleep or uiomove 308 */ 309 (void) spllowersoftclock(); 310 if ((sc->sc_flags & PARF_UIO) == 0) { 311 #ifdef DEBUG 312 if (pardebug & PDB_IO) 313 printf("parrw: uiomove/sleep timo, flags %x\n", 314 sc->sc_flags); 315 #endif 316 if (sc->sc_flags & PARF_TIMO) { 317 callout_stop(&sc->sc_timo_ch); 318 sc->sc_flags &= ~PARF_TIMO; 319 } 320 splx(s); 321 break; 322 } 323 splx(s); 324 /* 325 * Perform the operation 326 */ 327 cnt = parsend(sc, cp, len); 328 if (cnt < 0) { 329 error = -cnt; 330 break; 331 } 332 333 s = splsoftclock(); 334 /* 335 * Operation timeout (or non-blocking), quit now. 336 */ 337 if ((sc->sc_flags & PARF_UIO) == 0) { 338 #ifdef DEBUG 339 if (pardebug & PDB_IO) 340 printf("parrw: timeout/done\n"); 341 #endif 342 splx(s); 343 break; 344 } 345 /* 346 * Implement inter-read delay 347 */ 348 if (sc->sc_delay > 0) { 349 sc->sc_flags |= PARF_DELAY; 350 callout_reset(&sc->sc_start_ch, sc->sc_delay, 351 parstart, sc); 352 error = tsleep(sc, PCATCH|(PZERO-1), "par-cdelay", 0); 353 if (error) { 354 splx(s); 355 break; 356 } 357 } 358 splx(s); 359 /* 360 * Must not call uiomove again til we've used all data 361 * that we already grabbed. 362 */ 363 if (uio->uio_rw == UIO_WRITE && cnt != len) { 364 cp += cnt; 365 len -= cnt; 366 cnt = 0; 367 goto again; 368 } 369 } 370 s = splsoftclock(); 371 if (sc->sc_flags & PARF_TIMO) { 372 callout_stop(&sc->sc_timo_ch); 373 sc->sc_flags &= ~PARF_TIMO; 374 } 375 if (sc->sc_flags & PARF_DELAY) { 376 callout_stop(&sc->sc_start_ch); 377 sc->sc_flags &= ~PARF_DELAY; 378 } 379 splx(s); 380 /* 381 * Adjust for those chars that we uiomove'ed but never wrote 382 */ 383 if (uio->uio_rw == UIO_WRITE && cnt != len) { 384 uio->uio_resid += (len - cnt); 385 #ifdef DEBUG 386 if (pardebug & PDB_IO) 387 printf("parrw: short write, adjust by %d\n", 388 len-cnt); 389 #endif 390 } 391 free(buf, M_DEVBUF); 392 #ifdef DEBUG 393 if (pardebug & (PDB_FOLLOW|PDB_IO)) 394 printf("parrw: return %d, resid %d\n", error, uio->uio_resid); 395 #endif 396 return (error); 397 } 398 399 int 400 parioctl(dev, cmd, data, flag, p) 401 dev_t dev; 402 u_long cmd; 403 caddr_t data; 404 int flag; 405 struct proc *p; 406 { 407 struct par_softc *sc = par_cd.cd_devs[UNIT(dev)]; 408 struct parparam *pp, *upp; 409 int error = 0; 410 411 switch (cmd) { 412 case PARIOCGPARAM: 413 pp = &sc->sc_param; 414 upp = (struct parparam *)data; 415 upp->burst = pp->burst; 416 upp->timo = parhztoms(pp->timo); 417 upp->delay = parhztoms(pp->delay); 418 break; 419 420 case PARIOCSPARAM: 421 pp = &sc->sc_param; 422 upp = (struct parparam *)data; 423 if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX || 424 upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX) 425 return(EINVAL); 426 pp->burst = upp->burst; 427 pp->timo = parmstohz(upp->timo); 428 pp->delay = parmstohz(upp->delay); 429 break; 430 431 default: 432 return(EINVAL); 433 } 434 return (error); 435 } 436 437 int 438 parhztoms(h) 439 int h; 440 { 441 extern int hz; 442 register int m = h; 443 444 if (m > 0) 445 m = m * 1000 / hz; 446 return(m); 447 } 448 449 int 450 parmstohz(m) 451 int m; 452 { 453 extern int hz; 454 register int h = m; 455 456 if (h > 0) { 457 h = h * hz / 1000; 458 if (h == 0) 459 h = 1000 / hz; 460 } 461 return(h); 462 } 463 464 /* stuff below here if for interrupt driven output of data thru 465 the parallel port. */ 466 467 int partimeout_pending; 468 int parsend_pending; 469 470 void 471 parintr(arg) 472 void *arg; 473 { 474 int s, mask; 475 476 mask = (int)arg; 477 s = splclock(); 478 479 intio_set_sicilian_intr(intio_get_sicilian_intr() & 480 ~SICILIAN_INTR_PAR); 481 482 #ifdef DEBUG 483 if (pardebug & PDB_INTERRUPT) 484 printf ("parintr %d(%s)\n", mask, mask ? "FLG" : "tout"); 485 #endif 486 /* if invoked from timeout handler, mask will be 0, 487 * if from interrupt, it will contain the cia-icr mask, 488 * which is != 0 489 */ 490 if (mask) { 491 if (partimeout_pending) 492 callout_stop(&intr_callout); 493 if (parsend_pending) 494 parsend_pending = 0; 495 } 496 497 /* either way, there won't be a timeout pending any longer */ 498 partimeout_pending = 0; 499 500 wakeup(parintr); 501 splx (s); 502 } 503 504 int 505 parsendch(sc, ch) 506 struct par_softc *sc; 507 u_char ch; 508 { 509 int error = 0; 510 int s; 511 512 /* if either offline, busy or out of paper, wait for that 513 condition to clear */ 514 s = spl1(); 515 while (!error 516 && (parsend_pending 517 || !(intio_get_sicilian_intr() & SICILIAN_STAT_PAR))) 518 { 519 extern int hz; 520 521 /* wait a second, and try again */ 522 callout_reset(&intr_callout, hz, parintr, 0); 523 partimeout_pending = 1; 524 /* this is essentially a flipflop to have us wait for the 525 first character being transmitted when trying to transmit 526 the second, etc. */ 527 parsend_pending = 0; 528 /* it's quite important that a parallel putc can be 529 interrupted, given the possibility to lock a printer 530 in an offline condition.. */ 531 if ((error = tsleep (parintr, PCATCH|(PZERO-1), "parsendch", 0))) { 532 #ifdef DEBUG 533 if (pardebug & PDB_INTERRUPT) 534 printf ("parsendch interrupted, error = %d\n", error); 535 #endif 536 if (partimeout_pending) 537 callout_stop(&intr_callout); 538 539 partimeout_pending = 0; 540 } 541 } 542 543 if (!error) { 544 #ifdef DEBUG 545 if (pardebug & PDB_INTERRUPT) 546 printf ("#%d", ch); 547 #endif 548 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_DATA, ch); 549 DELAY(1); /* (DELAY(1) == 1us) > 0.5us */ 550 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_STROBE, 0); 551 intio_set_sicilian_intr (intio_get_sicilian_intr() | 552 SICILIAN_INTR_PAR); 553 DELAY(1); 554 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_STROBE, 1); 555 parsend_pending = 1; 556 } 557 558 splx (s); 559 560 return error; 561 } 562 563 564 int 565 parsend(sc, buf, len) 566 struct par_softc *sc; 567 u_char *buf; 568 int len; 569 { 570 int err, orig_len = len; 571 572 for (; len; len--, buf++) 573 if ((err = parsendch (sc, *buf))) 574 return err < 0 ? -EINTR : -err; 575 576 /* either all or nothing.. */ 577 return orig_len; 578 } 579
Indexes created Thu Oct 16 14:10:15 GMT 2025