par.c revision 1.37
1 /* $NetBSD: par.c,v 1.37 2008/06/25 08:14:59 isaki 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 1.37 2008/06/25 08:14:59 isaki 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 device_t 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; 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(device_t, cfdata_t, void *); 113 void parattach(device_t, device_t, void *); 114 115 CFATTACH_DECL_NEW(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(device_t pdp, cfdata_t 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(device_t pdp, device_t dp, void *aux) 158 { 159 struct par_softc *sc = device_private(dp); 160 struct intio_attach_args *ia = aux; 161 int r; 162 163 par_attached = 1; 164 165 sc->sc_dev = dp; 166 sc->sc_flags = PARF_ALIVE; 167 aprint_normal(": parallel port (write only, interrupt)\n"); 168 ia->ia_size = 0x2000; 169 r = intio_map_allocate_region(pdp, ia, INTIO_MAP_ALLOCATE); 170 #ifdef DIAGNOSTIC 171 if (r) 172 panic("IO map for PAR corruption??"); 173 #endif 174 sc->sc_bst = ia->ia_bst; 175 r = bus_space_map(sc->sc_bst, 176 ia->ia_addr, ia->ia_size, 177 BUS_SPACE_MAP_SHIFTED, 178 &sc->sc_bsh); 179 #ifdef DIAGNOSTIC 180 if (r) 181 panic("Cannot map IO space for PAR."); 182 #endif 183 184 intio_set_sicilian_intr(intio_get_sicilian_intr() & 185 ~SICILIAN_INTR_PAR); 186 187 intio_intr_establish(ia->ia_intr, "par", 188 (intio_intr_handler_t)parintr, (void *)1); 189 190 callout_init(&sc->sc_timo_ch, 0); 191 callout_init(&sc->sc_start_ch, 0); 192 callout_init(&intr_callout, 0); 193 } 194 195 int 196 paropen(dev_t dev, int flags, int mode, struct lwp *l) 197 { 198 int unit = UNIT(dev); 199 struct par_softc *sc; 200 201 sc = device_lookup_private(&par_cd, unit); 202 if (sc == NULL || !(sc->sc_flags & PARF_ALIVE)) 203 return(ENXIO); 204 if (sc->sc_flags & PARF_OPEN) 205 return(EBUSY); 206 /* X680x0 can't read */ 207 if ((flags & FREAD) == FREAD) 208 return (EINVAL); 209 210 sc->sc_flags |= PARF_OPEN; 211 212 sc->sc_flags |= PARF_OWRITE; 213 214 sc->sc_burst = PAR_BURST; 215 sc->sc_timo = parmstohz(PAR_TIMO); 216 sc->sc_delay = parmstohz(PAR_DELAY); 217 218 return(0); 219 } 220 221 int 222 parclose(dev_t dev, int flags, int mode, struct lwp *l) 223 { 224 int unit = UNIT(dev); 225 int s; 226 struct par_softc *sc = device_lookup_private(&par_cd, 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(void *arg) 241 { 242 struct par_softc *sc = arg; 243 #ifdef DEBUG 244 if (pardebug & PDB_FOLLOW) 245 printf("parstart(%x)\n", device_unit(sc->sc_dev)); 246 #endif 247 sc->sc_flags &= ~PARF_DELAY; 248 wakeup(sc); 249 } 250 251 void 252 partimo(void *arg) 253 { 254 struct par_softc *sc = arg; 255 #ifdef DEBUG 256 if (pardebug & PDB_FOLLOW) 257 printf("partimo(%x)\n", device_unit(sc->sc_dev)); 258 #endif 259 sc->sc_flags &= ~(PARF_UIO|PARF_TIMO); 260 wakeup(sc); 261 } 262 263 int 264 parwrite(dev_t dev, struct uio *uio, int flag) 265 { 266 267 #ifdef DEBUG 268 if (pardebug & PDB_FOLLOW) 269 printf("parwrite(%x, %p)\n", dev, uio); 270 #endif 271 return (parrw(dev, uio)); 272 } 273 274 int 275 parrw(dev_t dev, struct uio *uio) 276 { 277 int unit = UNIT(dev); 278 struct par_softc *sc = device_lookup_private(&par_cd, unit); 279 int len=0xdeadbeef; /* XXX: shutup gcc */ 280 int s, cnt=0; 281 char *cp; 282 int error = 0; 283 int buflen; 284 char *buf; 285 286 if (!!(sc->sc_flags & PARF_OREAD) ^ (uio->uio_rw == UIO_READ)) 287 return EINVAL; 288 289 if (uio->uio_resid == 0) 290 return(0); 291 292 buflen = min(sc->sc_burst, uio->uio_resid); 293 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 294 sc->sc_flags |= PARF_UIO; 295 if (sc->sc_timo > 0) { 296 sc->sc_flags |= PARF_TIMO; 297 callout_reset(&sc->sc_timo_ch, sc->sc_timo, partimo, sc); 298 } 299 while (uio->uio_resid > 0) { 300 len = min(buflen, uio->uio_resid); 301 cp = buf; 302 if (uio->uio_rw == UIO_WRITE) { 303 error = uiomove(cp, len, uio); 304 if (error) 305 break; 306 } 307 again: 308 s = splsoftclock(); 309 /* 310 * Check if we timed out during sleep or uiomove 311 */ 312 if ((sc->sc_flags & PARF_UIO) == 0) { 313 #ifdef DEBUG 314 if (pardebug & PDB_IO) 315 printf("parrw: uiomove/sleep timo, flags %x\n", 316 sc->sc_flags); 317 #endif 318 if (sc->sc_flags & PARF_TIMO) { 319 callout_stop(&sc->sc_timo_ch); 320 sc->sc_flags &= ~PARF_TIMO; 321 } 322 splx(s); 323 break; 324 } 325 splx(s); 326 /* 327 * Perform the operation 328 */ 329 cnt = parsend(sc, cp, len); 330 if (cnt < 0) { 331 error = -cnt; 332 break; 333 } 334 335 s = splsoftclock(); 336 /* 337 * Operation timeout (or non-blocking), quit now. 338 */ 339 if ((sc->sc_flags & PARF_UIO) == 0) { 340 #ifdef DEBUG 341 if (pardebug & PDB_IO) 342 printf("parrw: timeout/done\n"); 343 #endif 344 splx(s); 345 break; 346 } 347 /* 348 * Implement inter-read delay 349 */ 350 if (sc->sc_delay > 0) { 351 sc->sc_flags |= PARF_DELAY; 352 callout_reset(&sc->sc_start_ch, sc->sc_delay, 353 parstart, sc); 354 error = tsleep(sc, PCATCH|(PZERO-1), "par-cdelay", 0); 355 if (error) { 356 splx(s); 357 break; 358 } 359 } 360 splx(s); 361 /* 362 * Must not call uiomove again til we've used all data 363 * that we already grabbed. 364 */ 365 if (uio->uio_rw == UIO_WRITE && cnt != len) { 366 cp += cnt; 367 len -= cnt; 368 cnt = 0; 369 goto again; 370 } 371 } 372 s = splsoftclock(); 373 if (sc->sc_flags & PARF_TIMO) { 374 callout_stop(&sc->sc_timo_ch); 375 sc->sc_flags &= ~PARF_TIMO; 376 } 377 if (sc->sc_flags & PARF_DELAY) { 378 callout_stop(&sc->sc_start_ch); 379 sc->sc_flags &= ~PARF_DELAY; 380 } 381 splx(s); 382 /* 383 * Adjust for those chars that we uiomove'ed but never wrote 384 */ 385 /* 386 * XXXjdolecek: this len usage is wrong, this will be incorrect 387 * if the transfer size is longer than sc_burst 388 */ 389 if (uio->uio_rw == UIO_WRITE && cnt != len) { 390 uio->uio_resid += (len - cnt); 391 #ifdef DEBUG 392 if (pardebug & PDB_IO) 393 printf("parrw: short write, adjust by %d\n", 394 len-cnt); 395 #endif 396 } 397 free(buf, M_DEVBUF); 398 #ifdef DEBUG 399 if (pardebug & (PDB_FOLLOW|PDB_IO)) 400 printf("parrw: return %d, resid %d\n", error, uio->uio_resid); 401 #endif 402 return (error); 403 } 404 405 int 406 parioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 407 { 408 struct par_softc *sc = device_lookup_private(&par_cd, UNIT(dev)); 409 struct parparam *pp, *upp; 410 int error = 0; 411 412 switch (cmd) { 413 case PARIOCGPARAM: 414 pp = &sc->sc_param; 415 upp = (struct parparam *)data; 416 upp->burst = pp->burst; 417 upp->timo = parhztoms(pp->timo); 418 upp->delay = parhztoms(pp->delay); 419 break; 420 421 case PARIOCSPARAM: 422 pp = &sc->sc_param; 423 upp = (struct parparam *)data; 424 if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX || 425 upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX) 426 return(EINVAL); 427 pp->burst = upp->burst; 428 pp->timo = parmstohz(upp->timo); 429 pp->delay = parmstohz(upp->delay); 430 break; 431 432 default: 433 return(EINVAL); 434 } 435 return (error); 436 } 437 438 int 439 parhztoms(int h) 440 { 441 int m = h; 442 443 if (m > 0) 444 m = m * 1000 / hz; 445 return(m); 446 } 447 448 int 449 parmstohz(int m) 450 { 451 int h = m; 452 453 if (h > 0) { 454 h = h * hz / 1000; 455 if (h == 0) 456 h = 1000 / hz; 457 } 458 return(h); 459 } 460 461 /* stuff below here if for interrupt driven output of data thru 462 the parallel port. */ 463 464 int partimeout_pending; 465 int parsend_pending; 466 467 void 468 parintr(void *arg) 469 { 470 int s, mask; 471 472 mask = (int)arg; 473 s = splclock(); 474 475 intio_set_sicilian_intr(intio_get_sicilian_intr() & 476 ~SICILIAN_INTR_PAR); 477 478 #ifdef DEBUG 479 if (pardebug & PDB_INTERRUPT) 480 printf("parintr %d(%s)\n", mask, mask ? "FLG" : "tout"); 481 #endif 482 /* if invoked from timeout handler, mask will be 0, 483 * if from interrupt, it will contain the cia-icr mask, 484 * which is != 0 485 */ 486 if (mask) { 487 if (partimeout_pending) 488 callout_stop(&intr_callout); 489 if (parsend_pending) 490 parsend_pending = 0; 491 } 492 493 /* either way, there won't be a timeout pending any longer */ 494 partimeout_pending = 0; 495 496 wakeup(parintr); 497 splx(s); 498 } 499 500 int 501 parsendch(struct par_softc *sc, u_char ch) 502 { 503 int error = 0; 504 int s; 505 506 /* if either offline, busy or out of paper, wait for that 507 condition to clear */ 508 s = spl1(); 509 while (!error 510 && (parsend_pending 511 || !(intio_get_sicilian_intr() & SICILIAN_STAT_PAR))) 512 { 513 /* wait a second, and try again */ 514 callout_reset(&intr_callout, hz, parintr, 0); 515 partimeout_pending = 1; 516 /* this is essentially a flipflop to have us wait for the 517 first character being transmitted when trying to transmit 518 the second, etc. */ 519 parsend_pending = 0; 520 /* it's quite important that a parallel putc can be 521 interrupted, given the possibility to lock a printer 522 in an offline condition.. */ 523 if ((error = tsleep(parintr, PCATCH|(PZERO-1), "parsendch", 0))) { 524 #ifdef DEBUG 525 if (pardebug & PDB_INTERRUPT) 526 printf("parsendch interrupted, error = %d\n", error); 527 #endif 528 if (partimeout_pending) 529 callout_stop(&intr_callout); 530 531 partimeout_pending = 0; 532 } 533 } 534 535 if (!error) { 536 #ifdef DEBUG 537 if (pardebug & PDB_INTERRUPT) 538 printf("#%d", ch); 539 #endif 540 bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_DATA, ch); 541 DELAY(1); /* (DELAY(1) == 1us) > 0.5us */ 542 bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_STROBE, 0); 543 intio_set_sicilian_intr(intio_get_sicilian_intr() | 544 SICILIAN_INTR_PAR); 545 DELAY(1); 546 bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_STROBE, 1); 547 parsend_pending = 1; 548 } 549 550 splx(s); 551 552 return error; 553 } 554 555 556 int 557 parsend(struct par_softc *sc, u_char *buf, int len) 558 { 559 int err, orig_len = len; 560 561 for (; len; len--, buf++) 562 if ((err = parsendch(sc, *buf))) 563 return err < 0 ? -EINTR : -err; 564 565 /* either all or nothing.. */ 566 return orig_len; 567 } 568
Indexes created Mon Sep 29 03:10:08 GMT 2025