par.c revision 1.22
1 /* $NetBSD: par.c,v 1.22 2004/12/13 02:14:14 chs 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 1.22 2004/12/13 02:14:14 chs 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 static int par_attached; 120 121 dev_type_open(paropen); 122 dev_type_close(parclose); 123 dev_type_write(parwrite); 124 dev_type_ioctl(parioctl); 125 126 const struct cdevsw par_cdevsw = { 127 paropen, parclose, noread, parwrite, parioctl, 128 nostop, notty, nopoll, nommap, nokqfilter, 129 }; 130 131 int 132 parmatch(pdp, cfp, aux) 133 struct device *pdp; 134 struct cfdata *cfp; 135 void *aux; 136 { 137 struct intio_attach_args *ia = aux; 138 139 /* X680x0 has only one parallel port */ 140 if (strcmp(ia->ia_name, "par") || par_attached) 141 return 0; 142 143 if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) 144 ia->ia_addr = 0xe8c000; 145 ia->ia_size = 0x2000; 146 if (intio_map_allocate_region (pdp, ia, INTIO_MAP_TESTONLY)) 147 return 0; 148 if (ia->ia_intr == INTIOCF_INTR_DEFAULT) 149 ia->ia_intr = 99; 150 #if DIAGNOSTIC 151 if (ia->ia_intr != 99) 152 return 0; 153 #endif 154 155 return 1; 156 } 157 158 void 159 parattach(pdp, dp, aux) 160 struct device *pdp, *dp; 161 void *aux; 162 { 163 struct par_softc *sc = (struct par_softc *)dp; 164 struct intio_attach_args *ia = aux; 165 int r; 166 167 par_attached = 1; 168 169 sc->sc_flags = PARF_ALIVE; 170 printf(": parallel port (write only, interrupt)\n"); 171 ia->ia_size = 0x2000; 172 r = intio_map_allocate_region (pdp, ia, INTIO_MAP_ALLOCATE); 173 #ifdef DIAGNOSTIC 174 if (r) 175 panic ("IO map for PAR corruption??"); 176 #endif 177 sc->sc_bst = ia->ia_bst; 178 r = bus_space_map (sc->sc_bst, 179 ia->ia_addr, ia->ia_size, 180 BUS_SPACE_MAP_SHIFTED, 181 &sc->sc_bsh); 182 #ifdef DIAGNOSTIC 183 if (r) 184 panic ("Cannot map IO space for PAR."); 185 #endif 186 187 intio_set_sicilian_intr(intio_get_sicilian_intr() & 188 ~SICILIAN_INTR_PAR); 189 190 intio_intr_establish(ia->ia_intr, "par", 191 (intio_intr_handler_t) parintr, (void*) 1); 192 193 callout_init(&sc->sc_timo_ch); 194 callout_init(&sc->sc_start_ch); 195 } 196 197 int 198 paropen(dev, flags, mode, p) 199 dev_t dev; 200 int flags, mode; 201 struct proc *p; 202 { 203 int unit = UNIT(dev); 204 struct par_softc *sc; 205 206 sc = device_lookup(&par_cd, unit); 207 if (sc == NULL || !(sc->sc_flags & PARF_ALIVE)) 208 return(ENXIO); 209 if (sc->sc_flags & PARF_OPEN) 210 return(EBUSY); 211 /* X680x0 can't read */ 212 if ((flags & FREAD) == FREAD) 213 return (EINVAL); 214 215 sc->sc_flags |= PARF_OPEN; 216 217 sc->sc_flags |= PARF_OWRITE; 218 219 sc->sc_burst = PAR_BURST; 220 sc->sc_timo = parmstohz(PAR_TIMO); 221 sc->sc_delay = parmstohz(PAR_DELAY); 222 223 return(0); 224 } 225 226 int 227 parclose(dev, flags, mode, p) 228 dev_t dev; 229 int flags, mode; 230 struct proc *p; 231 { 232 int unit = UNIT(dev); 233 int s; 234 struct par_softc *sc = par_cd.cd_devs[unit]; 235 236 sc->sc_flags &= ~(PARF_OPEN|PARF_OWRITE); 237 238 /* don't allow interrupts any longer */ 239 s = spl1(); 240 intio_set_sicilian_intr(intio_get_sicilian_intr() & 241 ~SICILIAN_INTR_PAR); 242 splx(s); 243 244 return (0); 245 } 246 247 void 248 parstart(arg) 249 void *arg; 250 { 251 struct par_softc *sc = arg; 252 #ifdef DEBUG 253 if (pardebug & PDB_FOLLOW) 254 printf("parstart(%x)\n", sc->sc_dev.dv_unit); 255 #endif 256 sc->sc_flags &= ~PARF_DELAY; 257 wakeup(sc); 258 } 259 260 void 261 partimo(arg) 262 void *arg; 263 { 264 struct par_softc *sc = arg; 265 #ifdef DEBUG 266 if (pardebug & PDB_FOLLOW) 267 printf("partimo(%x)\n", sc->sc_dev.dv_unit); 268 #endif 269 sc->sc_flags &= ~(PARF_UIO|PARF_TIMO); 270 wakeup(sc); 271 } 272 273 int 274 parwrite(dev, uio, flag) 275 dev_t dev; 276 struct uio *uio; 277 int flag; 278 { 279 280 #ifdef DEBUG 281 if (pardebug & PDB_FOLLOW) 282 printf("parwrite(%x, %p)\n", dev, uio); 283 #endif 284 return (parrw(dev, uio)); 285 } 286 287 int 288 parrw(dev, uio) 289 dev_t dev; 290 struct uio *uio; 291 { 292 int unit = UNIT(dev); 293 struct par_softc *sc = par_cd.cd_devs[unit]; 294 int len=0xdeadbeef; /* XXX: shutup gcc */ 295 int s, cnt=0; 296 char *cp; 297 int error = 0; 298 int buflen; 299 char *buf; 300 301 if (!!(sc->sc_flags & PARF_OREAD) ^ (uio->uio_rw == UIO_READ)) 302 return EINVAL; 303 304 if (uio->uio_resid == 0) 305 return(0); 306 307 buflen = min(sc->sc_burst, uio->uio_resid); 308 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 309 sc->sc_flags |= PARF_UIO; 310 if (sc->sc_timo > 0) { 311 sc->sc_flags |= PARF_TIMO; 312 callout_reset(&sc->sc_timo_ch, sc->sc_timo, partimo, sc); 313 } 314 while (uio->uio_resid > 0) { 315 len = min(buflen, uio->uio_resid); 316 cp = buf; 317 if (uio->uio_rw == UIO_WRITE) { 318 error = uiomove(cp, len, uio); 319 if (error) 320 break; 321 } 322 again: 323 s = spl1(); 324 /* 325 * Check if we timed out during sleep or uiomove 326 */ 327 (void) spllowersoftclock(); 328 if ((sc->sc_flags & PARF_UIO) == 0) { 329 #ifdef DEBUG 330 if (pardebug & PDB_IO) 331 printf("parrw: uiomove/sleep timo, flags %x\n", 332 sc->sc_flags); 333 #endif 334 if (sc->sc_flags & PARF_TIMO) { 335 callout_stop(&sc->sc_timo_ch); 336 sc->sc_flags &= ~PARF_TIMO; 337 } 338 splx(s); 339 break; 340 } 341 splx(s); 342 /* 343 * Perform the operation 344 */ 345 cnt = parsend(sc, cp, len); 346 if (cnt < 0) { 347 error = -cnt; 348 break; 349 } 350 351 s = splsoftclock(); 352 /* 353 * Operation timeout (or non-blocking), quit now. 354 */ 355 if ((sc->sc_flags & PARF_UIO) == 0) { 356 #ifdef DEBUG 357 if (pardebug & PDB_IO) 358 printf("parrw: timeout/done\n"); 359 #endif 360 splx(s); 361 break; 362 } 363 /* 364 * Implement inter-read delay 365 */ 366 if (sc->sc_delay > 0) { 367 sc->sc_flags |= PARF_DELAY; 368 callout_reset(&sc->sc_start_ch, sc->sc_delay, 369 parstart, sc); 370 error = tsleep(sc, PCATCH|(PZERO-1), "par-cdelay", 0); 371 if (error) { 372 splx(s); 373 break; 374 } 375 } 376 splx(s); 377 /* 378 * Must not call uiomove again til we've used all data 379 * that we already grabbed. 380 */ 381 if (uio->uio_rw == UIO_WRITE && cnt != len) { 382 cp += cnt; 383 len -= cnt; 384 cnt = 0; 385 goto again; 386 } 387 } 388 s = splsoftclock(); 389 if (sc->sc_flags & PARF_TIMO) { 390 callout_stop(&sc->sc_timo_ch); 391 sc->sc_flags &= ~PARF_TIMO; 392 } 393 if (sc->sc_flags & PARF_DELAY) { 394 callout_stop(&sc->sc_start_ch); 395 sc->sc_flags &= ~PARF_DELAY; 396 } 397 splx(s); 398 /* 399 * Adjust for those chars that we uiomove'ed but never wrote 400 */ 401 /* 402 * XXXjdolecek: this len usage is wrong, this will be incorrect 403 * if the transfer size is longer than sc_burst 404 */ 405 if (uio->uio_rw == UIO_WRITE && cnt != len) { 406 uio->uio_resid += (len - cnt); 407 #ifdef DEBUG 408 if (pardebug & PDB_IO) 409 printf("parrw: short write, adjust by %d\n", 410 len-cnt); 411 #endif 412 } 413 free(buf, M_DEVBUF); 414 #ifdef DEBUG 415 if (pardebug & (PDB_FOLLOW|PDB_IO)) 416 printf("parrw: return %d, resid %d\n", error, uio->uio_resid); 417 #endif 418 return (error); 419 } 420 421 int 422 parioctl(dev, cmd, data, flag, p) 423 dev_t dev; 424 u_long cmd; 425 caddr_t data; 426 int flag; 427 struct proc *p; 428 { 429 struct par_softc *sc = par_cd.cd_devs[UNIT(dev)]; 430 struct parparam *pp, *upp; 431 int error = 0; 432 433 switch (cmd) { 434 case PARIOCGPARAM: 435 pp = &sc->sc_param; 436 upp = (struct parparam *)data; 437 upp->burst = pp->burst; 438 upp->timo = parhztoms(pp->timo); 439 upp->delay = parhztoms(pp->delay); 440 break; 441 442 case PARIOCSPARAM: 443 pp = &sc->sc_param; 444 upp = (struct parparam *)data; 445 if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX || 446 upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX) 447 return(EINVAL); 448 pp->burst = upp->burst; 449 pp->timo = parmstohz(upp->timo); 450 pp->delay = parmstohz(upp->delay); 451 break; 452 453 default: 454 return(EINVAL); 455 } 456 return (error); 457 } 458 459 int 460 parhztoms(h) 461 int h; 462 { 463 extern int hz; 464 int m = h; 465 466 if (m > 0) 467 m = m * 1000 / hz; 468 return(m); 469 } 470 471 int 472 parmstohz(m) 473 int m; 474 { 475 extern int hz; 476 int h = m; 477 478 if (h > 0) { 479 h = h * hz / 1000; 480 if (h == 0) 481 h = 1000 / hz; 482 } 483 return(h); 484 } 485 486 /* stuff below here if for interrupt driven output of data thru 487 the parallel port. */ 488 489 int partimeout_pending; 490 int parsend_pending; 491 492 void 493 parintr(arg) 494 void *arg; 495 { 496 int s, mask; 497 498 mask = (int)arg; 499 s = splclock(); 500 501 intio_set_sicilian_intr(intio_get_sicilian_intr() & 502 ~SICILIAN_INTR_PAR); 503 504 #ifdef DEBUG 505 if (pardebug & PDB_INTERRUPT) 506 printf ("parintr %d(%s)\n", mask, mask ? "FLG" : "tout"); 507 #endif 508 /* if invoked from timeout handler, mask will be 0, 509 * if from interrupt, it will contain the cia-icr mask, 510 * which is != 0 511 */ 512 if (mask) { 513 if (partimeout_pending) 514 callout_stop(&intr_callout); 515 if (parsend_pending) 516 parsend_pending = 0; 517 } 518 519 /* either way, there won't be a timeout pending any longer */ 520 partimeout_pending = 0; 521 522 wakeup(parintr); 523 splx (s); 524 } 525 526 int 527 parsendch(sc, ch) 528 struct par_softc *sc; 529 u_char ch; 530 { 531 int error = 0; 532 int s; 533 534 /* if either offline, busy or out of paper, wait for that 535 condition to clear */ 536 s = spl1(); 537 while (!error 538 && (parsend_pending 539 || !(intio_get_sicilian_intr() & SICILIAN_STAT_PAR))) 540 { 541 extern int hz; 542 543 /* wait a second, and try again */ 544 callout_reset(&intr_callout, hz, parintr, 0); 545 partimeout_pending = 1; 546 /* this is essentially a flipflop to have us wait for the 547 first character being transmitted when trying to transmit 548 the second, etc. */ 549 parsend_pending = 0; 550 /* it's quite important that a parallel putc can be 551 interrupted, given the possibility to lock a printer 552 in an offline condition.. */ 553 if ((error = tsleep (parintr, PCATCH|(PZERO-1), "parsendch", 0))) { 554 #ifdef DEBUG 555 if (pardebug & PDB_INTERRUPT) 556 printf ("parsendch interrupted, error = %d\n", error); 557 #endif 558 if (partimeout_pending) 559 callout_stop(&intr_callout); 560 561 partimeout_pending = 0; 562 } 563 } 564 565 if (!error) { 566 #ifdef DEBUG 567 if (pardebug & PDB_INTERRUPT) 568 printf ("#%d", ch); 569 #endif 570 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_DATA, ch); 571 DELAY(1); /* (DELAY(1) == 1us) > 0.5us */ 572 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_STROBE, 0); 573 intio_set_sicilian_intr (intio_get_sicilian_intr() | 574 SICILIAN_INTR_PAR); 575 DELAY(1); 576 bus_space_write_1 (sc->sc_bst, sc->sc_bsh, PAR_STROBE, 1); 577 parsend_pending = 1; 578 } 579 580 splx (s); 581 582 return error; 583 } 584 585 586 int 587 parsend(sc, buf, len) 588 struct par_softc *sc; 589 u_char *buf; 590 int len; 591 { 592 int err, orig_len = len; 593 594 for (; len; len--, buf++) 595 if ((err = parsendch (sc, *buf))) 596 return err < 0 ? -EINTR : -err; 597 598 /* either all or nothing.. */ 599 return orig_len; 600 } 601
Indexes created Wed Oct 15 07:09:58 GMT 2025