par.c revision 1.33
1 /* $NetBSD: par.c,v 1.33 2007/07/14 10:46:26 ad 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 1.33 2007/07/14 10:46:26 ad 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 #include <sys/kernel.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(void *); 88 void parstart(void *); 89 void parintr(void *); 90 int parrw(dev_t, struct uio *); 91 int parhztoms(int); 92 int parmstohz(int); 93 int parsendch(struct par_softc *, u_char); 94 int parsend(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(struct device *, struct cfdata *, void *); 113 void parattach(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 static int par_attached; 121 122 dev_type_open(paropen); 123 dev_type_close(parclose); 124 dev_type_write(parwrite); 125 dev_type_ioctl(parioctl); 126 127 const struct cdevsw par_cdevsw = { 128 paropen, parclose, noread, parwrite, parioctl, 129 nostop, notty, nopoll, nommap, nokqfilter, 130 }; 131 132 int 133 parmatch(struct device *pdp, struct cfdata *cfp, 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") || par_attached) 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(struct device *pdp, struct device *dp, void *aux) 158 { 159 struct par_softc *sc = (struct par_softc *)dp; 160 struct intio_attach_args *ia = aux; 161 int r; 162 163 par_attached = 1; 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, 0); 190 callout_init(&sc->sc_start_ch, 0); 191 } 192 193 int 194 paropen(dev_t dev, int flags, int mode, struct lwp *l) 195 { 196 int unit = UNIT(dev); 197 struct par_softc *sc; 198 199 sc = device_lookup(&par_cd, unit); 200 if (sc == NULL || !(sc->sc_flags & PARF_ALIVE)) 201 return(ENXIO); 202 if (sc->sc_flags & PARF_OPEN) 203 return(EBUSY); 204 /* X680x0 can't read */ 205 if ((flags & FREAD) == FREAD) 206 return (EINVAL); 207 208 sc->sc_flags |= PARF_OPEN; 209 210 sc->sc_flags |= PARF_OWRITE; 211 212 sc->sc_burst = PAR_BURST; 213 sc->sc_timo = parmstohz(PAR_TIMO); 214 sc->sc_delay = parmstohz(PAR_DELAY); 215 216 return(0); 217 } 218 219 int 220 parclose(dev_t dev, int flags, int mode, struct lwp *l) 221 { 222 int unit = UNIT(dev); 223 int s; 224 struct par_softc *sc = par_cd.cd_devs[unit]; 225 226 sc->sc_flags &= ~(PARF_OPEN|PARF_OWRITE); 227 228 /* don't allow interrupts any longer */ 229 s = spl1(); 230 intio_set_sicilian_intr(intio_get_sicilian_intr() & 231 ~SICILIAN_INTR_PAR); 232 splx(s); 233 234 return (0); 235 } 236 237 void 238 parstart(void *arg) 239 { 240 struct par_softc *sc = arg; 241 #ifdef DEBUG 242 if (pardebug & PDB_FOLLOW) 243 printf("parstart(%x)\n", device_unit(&sc->sc_dev)); 244 #endif 245 sc->sc_flags &= ~PARF_DELAY; 246 wakeup(sc); 247 } 248 249 void 250 partimo(void *arg) 251 { 252 struct par_softc *sc = arg; 253 #ifdef DEBUG 254 if (pardebug & PDB_FOLLOW) 255 printf("partimo(%x)\n", device_unit(&sc->sc_dev)); 256 #endif 257 sc->sc_flags &= ~(PARF_UIO|PARF_TIMO); 258 wakeup(sc); 259 } 260 261 int 262 parwrite(dev_t dev, struct uio *uio, int flag) 263 { 264 265 #ifdef DEBUG 266 if (pardebug & PDB_FOLLOW) 267 printf("parwrite(%x, %p)\n", dev, uio); 268 #endif 269 return (parrw(dev, uio)); 270 } 271 272 int 273 parrw(dev_t dev, struct uio *uio) 274 { 275 int unit = UNIT(dev); 276 struct par_softc *sc = par_cd.cd_devs[unit]; 277 int len=0xdeadbeef; /* XXX: shutup gcc */ 278 int s, cnt=0; 279 char *cp; 280 int error = 0; 281 int buflen; 282 char *buf; 283 284 if (!!(sc->sc_flags & PARF_OREAD) ^ (uio->uio_rw == UIO_READ)) 285 return EINVAL; 286 287 if (uio->uio_resid == 0) 288 return(0); 289 290 buflen = min(sc->sc_burst, uio->uio_resid); 291 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 292 sc->sc_flags |= PARF_UIO; 293 if (sc->sc_timo > 0) { 294 sc->sc_flags |= PARF_TIMO; 295 callout_reset(&sc->sc_timo_ch, sc->sc_timo, partimo, sc); 296 } 297 while (uio->uio_resid > 0) { 298 len = min(buflen, uio->uio_resid); 299 cp = buf; 300 if (uio->uio_rw == UIO_WRITE) { 301 error = uiomove(cp, len, uio); 302 if (error) 303 break; 304 } 305 again: 306 s = splsoftclock(); 307 /* 308 * Check if we timed out during sleep or uiomove 309 */ 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 /* 384 * XXXjdolecek: this len usage is wrong, this will be incorrect 385 * if the transfer size is longer than sc_burst 386 */ 387 if (uio->uio_rw == UIO_WRITE && cnt != len) { 388 uio->uio_resid += (len - cnt); 389 #ifdef DEBUG 390 if (pardebug & PDB_IO) 391 printf("parrw: short write, adjust by %d\n", 392 len-cnt); 393 #endif 394 } 395 free(buf, M_DEVBUF); 396 #ifdef DEBUG 397 if (pardebug & (PDB_FOLLOW|PDB_IO)) 398 printf("parrw: return %d, resid %d\n", error, uio->uio_resid); 399 #endif 400 return (error); 401 } 402 403 int 404 parioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 405 { 406 struct par_softc *sc = par_cd.cd_devs[UNIT(dev)]; 407 struct parparam *pp, *upp; 408 int error = 0; 409 410 switch (cmd) { 411 case PARIOCGPARAM: 412 pp = &sc->sc_param; 413 upp = (struct parparam *)data; 414 upp->burst = pp->burst; 415 upp->timo = parhztoms(pp->timo); 416 upp->delay = parhztoms(pp->delay); 417 break; 418 419 case PARIOCSPARAM: 420 pp = &sc->sc_param; 421 upp = (struct parparam *)data; 422 if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX || 423 upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX) 424 return(EINVAL); 425 pp->burst = upp->burst; 426 pp->timo = parmstohz(upp->timo); 427 pp->delay = parmstohz(upp->delay); 428 break; 429 430 default: 431 return(EINVAL); 432 } 433 return (error); 434 } 435 436 int 437 parhztoms(int h) 438 { 439 int m = h; 440 441 if (m > 0) 442 m = m * 1000 / hz; 443 return(m); 444 } 445 446 int 447 parmstohz(int m) 448 { 449 int h = m; 450 451 if (h > 0) { 452 h = h * hz / 1000; 453 if (h == 0) 454 h = 1000 / hz; 455 } 456 return(h); 457 } 458 459 /* stuff below here if for interrupt driven output of data thru 460 the parallel port. */ 461 462 int partimeout_pending; 463 int parsend_pending; 464 465 void 466 parintr(void *arg) 467 { 468 int s, mask; 469 470 mask = (int)arg; 471 s = splclock(); 472 473 intio_set_sicilian_intr(intio_get_sicilian_intr() & 474 ~SICILIAN_INTR_PAR); 475 476 #ifdef DEBUG 477 if (pardebug & PDB_INTERRUPT) 478 printf("parintr %d(%s)\n", mask, mask ? "FLG" : "tout"); 479 #endif 480 /* if invoked from timeout handler, mask will be 0, 481 * if from interrupt, it will contain the cia-icr mask, 482 * which is != 0 483 */ 484 if (mask) { 485 if (partimeout_pending) 486 callout_stop(&intr_callout); 487 if (parsend_pending) 488 parsend_pending = 0; 489 } 490 491 /* either way, there won't be a timeout pending any longer */ 492 partimeout_pending = 0; 493 494 wakeup(parintr); 495 splx(s); 496 } 497 498 int 499 parsendch(struct par_softc *sc, u_char ch) 500 { 501 int error = 0; 502 int s; 503 504 /* if either offline, busy or out of paper, wait for that 505 condition to clear */ 506 s = spl1(); 507 while (!error 508 && (parsend_pending 509 || !(intio_get_sicilian_intr() & SICILIAN_STAT_PAR))) 510 { 511 /* wait a second, and try again */ 512 callout_reset(&intr_callout, hz, parintr, 0); 513 partimeout_pending = 1; 514 /* this is essentially a flipflop to have us wait for the 515 first character being transmitted when trying to transmit 516 the second, etc. */ 517 parsend_pending = 0; 518 /* it's quite important that a parallel putc can be 519 interrupted, given the possibility to lock a printer 520 in an offline condition.. */ 521 if ((error = tsleep(parintr, PCATCH|(PZERO-1), "parsendch", 0))) { 522 #ifdef DEBUG 523 if (pardebug & PDB_INTERRUPT) 524 printf("parsendch interrupted, error = %d\n", error); 525 #endif 526 if (partimeout_pending) 527 callout_stop(&intr_callout); 528 529 partimeout_pending = 0; 530 } 531 } 532 533 if (!error) { 534 #ifdef DEBUG 535 if (pardebug & PDB_INTERRUPT) 536 printf("#%d", ch); 537 #endif 538 bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_DATA, ch); 539 DELAY(1); /* (DELAY(1) == 1us) > 0.5us */ 540 bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_STROBE, 0); 541 intio_set_sicilian_intr(intio_get_sicilian_intr() | 542 SICILIAN_INTR_PAR); 543 DELAY(1); 544 bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_STROBE, 1); 545 parsend_pending = 1; 546 } 547 548 splx(s); 549 550 return error; 551 } 552 553 554 int 555 parsend(struct par_softc *sc, u_char *buf, int len) 556 { 557 int err, orig_len = len; 558 559 for (; len; len--, buf++) 560 if ((err = parsendch(sc, *buf))) 561 return err < 0 ? -EINTR : -err; 562 563 /* either all or nothing.. */ 564 return orig_len; 565 } 566
Indexes created Tue Sep 30 11:09:46 GMT 2025