par.c revision 1.40
1 /* $NetBSD: par.c,v 1.40 2014/03/16 05:20:26 dholland 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 1.40 2014/03/16 05:20:26 dholland 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 .d_open = paropen, 129 .d_close = parclose, 130 .d_read = noread, 131 .d_write = parwrite, 132 .d_ioctl = parioctl, 133 .d_stop = nostop, 134 .d_tty = notty, 135 .d_poll = nopoll, 136 .d_mmap = nommap, 137 .d_kqfilter = nokqfilter, 138 .d_flag = 0 139 }; 140 141 int 142 parmatch(device_t parent, cfdata_t cf, void *aux) 143 { 144 struct intio_attach_args *ia = aux; 145 146 /* X680x0 has only one parallel port */ 147 if (strcmp(ia->ia_name, "par") || par_attached) 148 return 0; 149 150 if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) 151 ia->ia_addr = 0xe8c000; 152 ia->ia_size = 0x2000; 153 if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY)) 154 return 0; 155 if (ia->ia_intr == INTIOCF_INTR_DEFAULT) 156 ia->ia_intr = 99; 157 #if DIAGNOSTIC 158 if (ia->ia_intr != 99) 159 return 0; 160 #endif 161 162 return 1; 163 } 164 165 void 166 parattach(device_t parent, device_t self, void *aux) 167 { 168 struct par_softc *sc = device_private(self); 169 struct intio_attach_args *ia = aux; 170 int r; 171 172 par_attached = 1; 173 174 sc->sc_dev = self; 175 sc->sc_flags = PARF_ALIVE; 176 aprint_normal(": parallel port (write only, interrupt)\n"); 177 ia->ia_size = 0x2000; 178 r = intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE); 179 #ifdef DIAGNOSTIC 180 if (r) 181 panic("IO map for PAR corruption??"); 182 #endif 183 sc->sc_bst = ia->ia_bst; 184 r = bus_space_map(sc->sc_bst, 185 ia->ia_addr, ia->ia_size, 186 BUS_SPACE_MAP_SHIFTED, 187 &sc->sc_bsh); 188 #ifdef DIAGNOSTIC 189 if (r) 190 panic("Cannot map IO space for PAR."); 191 #endif 192 193 intio_set_sicilian_intr(intio_get_sicilian_intr() & 194 ~SICILIAN_INTR_PAR); 195 196 intio_intr_establish(ia->ia_intr, "par", 197 (intio_intr_handler_t)parintr, (void *)1); 198 199 callout_init(&sc->sc_timo_ch, 0); 200 callout_init(&sc->sc_start_ch, 0); 201 callout_init(&intr_callout, 0); 202 } 203 204 int 205 paropen(dev_t dev, int flags, int mode, struct lwp *l) 206 { 207 int unit = UNIT(dev); 208 struct par_softc *sc; 209 210 sc = device_lookup_private(&par_cd, unit); 211 if (sc == NULL || !(sc->sc_flags & PARF_ALIVE)) 212 return(ENXIO); 213 if (sc->sc_flags & PARF_OPEN) 214 return(EBUSY); 215 /* X680x0 can't read */ 216 if ((flags & FREAD) == FREAD) 217 return (EINVAL); 218 219 sc->sc_flags |= PARF_OPEN; 220 221 sc->sc_flags |= PARF_OWRITE; 222 223 sc->sc_burst = PAR_BURST; 224 sc->sc_timo = parmstohz(PAR_TIMO); 225 sc->sc_delay = parmstohz(PAR_DELAY); 226 227 return(0); 228 } 229 230 int 231 parclose(dev_t dev, int flags, int mode, struct lwp *l) 232 { 233 int unit = UNIT(dev); 234 int s; 235 struct par_softc *sc = device_lookup_private(&par_cd, unit); 236 237 sc->sc_flags &= ~(PARF_OPEN|PARF_OWRITE); 238 239 /* don't allow interrupts any longer */ 240 s = spl1(); 241 intio_set_sicilian_intr(intio_get_sicilian_intr() & 242 ~SICILIAN_INTR_PAR); 243 splx(s); 244 245 return (0); 246 } 247 248 void 249 parstart(void *arg) 250 { 251 struct par_softc *sc = arg; 252 #ifdef DEBUG 253 if (pardebug & PDB_FOLLOW) 254 printf("parstart(%x)\n", device_unit(sc->sc_dev)); 255 #endif 256 sc->sc_flags &= ~PARF_DELAY; 257 wakeup(sc); 258 } 259 260 void 261 partimo(void *arg) 262 { 263 struct par_softc *sc = arg; 264 #ifdef DEBUG 265 if (pardebug & PDB_FOLLOW) 266 printf("partimo(%x)\n", device_unit(sc->sc_dev)); 267 #endif 268 sc->sc_flags &= ~(PARF_UIO|PARF_TIMO); 269 wakeup(sc); 270 } 271 272 int 273 parwrite(dev_t dev, struct uio *uio, int flag) 274 { 275 276 #ifdef DEBUG 277 if (pardebug & PDB_FOLLOW) 278 printf("parwrite(%x, %p)\n", UNIT(dev), uio); 279 #endif 280 return (parrw(dev, uio)); 281 } 282 283 int 284 parrw(dev_t dev, struct uio *uio) 285 { 286 int unit = UNIT(dev); 287 struct par_softc *sc = device_lookup_private(&par_cd, unit); 288 int len=0xdeadbeef; /* XXX: shutup gcc */ 289 int s, cnt=0; 290 char *cp; 291 int error = 0; 292 int buflen; 293 char *buf; 294 295 if (!!(sc->sc_flags & PARF_OREAD) ^ (uio->uio_rw == UIO_READ)) 296 return EINVAL; 297 298 if (uio->uio_resid == 0) 299 return(0); 300 301 buflen = min(sc->sc_burst, uio->uio_resid); 302 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 303 sc->sc_flags |= PARF_UIO; 304 if (sc->sc_timo > 0) { 305 sc->sc_flags |= PARF_TIMO; 306 callout_reset(&sc->sc_timo_ch, sc->sc_timo, partimo, sc); 307 } 308 while (uio->uio_resid > 0) { 309 len = min(buflen, uio->uio_resid); 310 cp = buf; 311 if (uio->uio_rw == UIO_WRITE) { 312 error = uiomove(cp, len, uio); 313 if (error) 314 break; 315 } 316 again: 317 s = splsoftclock(); 318 /* 319 * Check if we timed out during sleep or uiomove 320 */ 321 if ((sc->sc_flags & PARF_UIO) == 0) { 322 #ifdef DEBUG 323 if (pardebug & PDB_IO) 324 printf("parrw: uiomove/sleep timo, flags %x\n", 325 sc->sc_flags); 326 #endif 327 if (sc->sc_flags & PARF_TIMO) { 328 callout_stop(&sc->sc_timo_ch); 329 sc->sc_flags &= ~PARF_TIMO; 330 } 331 splx(s); 332 break; 333 } 334 splx(s); 335 /* 336 * Perform the operation 337 */ 338 cnt = parsend(sc, cp, len); 339 if (cnt < 0) { 340 error = -cnt; 341 break; 342 } 343 344 s = splsoftclock(); 345 /* 346 * Operation timeout (or non-blocking), quit now. 347 */ 348 if ((sc->sc_flags & PARF_UIO) == 0) { 349 #ifdef DEBUG 350 if (pardebug & PDB_IO) 351 printf("parrw: timeout/done\n"); 352 #endif 353 splx(s); 354 break; 355 } 356 /* 357 * Implement inter-read delay 358 */ 359 if (sc->sc_delay > 0) { 360 sc->sc_flags |= PARF_DELAY; 361 callout_reset(&sc->sc_start_ch, sc->sc_delay, 362 parstart, sc); 363 error = tsleep(sc, PCATCH|(PZERO-1), "par-cdelay", 0); 364 if (error) { 365 splx(s); 366 break; 367 } 368 } 369 splx(s); 370 /* 371 * Must not call uiomove again til we've used all data 372 * that we already grabbed. 373 */ 374 if (uio->uio_rw == UIO_WRITE && cnt != len) { 375 cp += cnt; 376 len -= cnt; 377 cnt = 0; 378 goto again; 379 } 380 } 381 s = splsoftclock(); 382 if (sc->sc_flags & PARF_TIMO) { 383 callout_stop(&sc->sc_timo_ch); 384 sc->sc_flags &= ~PARF_TIMO; 385 } 386 if (sc->sc_flags & PARF_DELAY) { 387 callout_stop(&sc->sc_start_ch); 388 sc->sc_flags &= ~PARF_DELAY; 389 } 390 splx(s); 391 /* 392 * Adjust for those chars that we uiomove'ed but never wrote 393 */ 394 /* 395 * XXXjdolecek: this len usage is wrong, this will be incorrect 396 * if the transfer size is longer than sc_burst 397 */ 398 if (uio->uio_rw == UIO_WRITE && cnt != len) { 399 uio->uio_resid += (len - cnt); 400 #ifdef DEBUG 401 if (pardebug & PDB_IO) 402 printf("parrw: short write, adjust by %d\n", 403 len-cnt); 404 #endif 405 } 406 free(buf, M_DEVBUF); 407 #ifdef DEBUG 408 if (pardebug & (PDB_FOLLOW|PDB_IO)) 409 printf("parrw: return %d, resid %d\n", error, uio->uio_resid); 410 #endif 411 return (error); 412 } 413 414 int 415 parioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 416 { 417 struct par_softc *sc = device_lookup_private(&par_cd, UNIT(dev)); 418 struct parparam *pp, *upp; 419 int error = 0; 420 421 switch (cmd) { 422 case PARIOCGPARAM: 423 pp = &sc->sc_param; 424 upp = (struct parparam *)data; 425 upp->burst = pp->burst; 426 upp->timo = parhztoms(pp->timo); 427 upp->delay = parhztoms(pp->delay); 428 break; 429 430 case PARIOCSPARAM: 431 pp = &sc->sc_param; 432 upp = (struct parparam *)data; 433 if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX || 434 upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX) 435 return(EINVAL); 436 pp->burst = upp->burst; 437 pp->timo = parmstohz(upp->timo); 438 pp->delay = parmstohz(upp->delay); 439 break; 440 441 default: 442 return(EINVAL); 443 } 444 return (error); 445 } 446 447 int 448 parhztoms(int h) 449 { 450 int m = h; 451 452 if (m > 0) 453 m = m * 1000 / hz; 454 return(m); 455 } 456 457 int 458 parmstohz(int m) 459 { 460 int h = m; 461 462 if (h > 0) { 463 h = h * hz / 1000; 464 if (h == 0) 465 h = 1000 / hz; 466 } 467 return(h); 468 } 469 470 /* stuff below here if for interrupt driven output of data thru 471 the parallel port. */ 472 473 int partimeout_pending; 474 int parsend_pending; 475 476 void 477 parintr(void *arg) 478 { 479 int s, mask; 480 481 mask = (int)arg; 482 s = splclock(); 483 484 intio_set_sicilian_intr(intio_get_sicilian_intr() & 485 ~SICILIAN_INTR_PAR); 486 487 #ifdef DEBUG 488 if (pardebug & PDB_INTERRUPT) 489 printf("parintr %d(%s)\n", mask, mask ? "FLG" : "tout"); 490 #endif 491 /* if invoked from timeout handler, mask will be 0, 492 * if from interrupt, it will contain the cia-icr mask, 493 * which is != 0 494 */ 495 if (mask) { 496 if (partimeout_pending) 497 callout_stop(&intr_callout); 498 if (parsend_pending) 499 parsend_pending = 0; 500 } 501 502 /* either way, there won't be a timeout pending any longer */ 503 partimeout_pending = 0; 504 505 wakeup(parintr); 506 splx(s); 507 } 508 509 int 510 parsendch(struct par_softc *sc, u_char ch) 511 { 512 int error = 0; 513 int s; 514 515 /* if either offline, busy or out of paper, wait for that 516 condition to clear */ 517 s = spl1(); 518 while (!error 519 && (parsend_pending 520 || !(intio_get_sicilian_intr() & SICILIAN_STAT_PAR))) 521 { 522 /* wait a second, and try again */ 523 callout_reset(&intr_callout, hz, parintr, 0); 524 partimeout_pending = 1; 525 /* this is essentially a flipflop to have us wait for the 526 first character being transmitted when trying to transmit 527 the second, etc. */ 528 parsend_pending = 0; 529 /* it's quite important that a parallel putc can be 530 interrupted, given the possibility to lock a printer 531 in an offline condition.. */ 532 if ((error = tsleep(parintr, PCATCH|(PZERO-1), "parsendch", 0))) { 533 #ifdef DEBUG 534 if (pardebug & PDB_INTERRUPT) 535 printf("parsendch interrupted, error = %d\n", error); 536 #endif 537 if (partimeout_pending) 538 callout_stop(&intr_callout); 539 540 partimeout_pending = 0; 541 } 542 } 543 544 if (!error) { 545 #ifdef DEBUG 546 if (pardebug & PDB_INTERRUPT) 547 printf("#%d", ch); 548 #endif 549 bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_DATA, ch); 550 DELAY(1); /* (DELAY(1) == 1us) > 0.5us */ 551 bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_STROBE, 0); 552 intio_set_sicilian_intr(intio_get_sicilian_intr() | 553 SICILIAN_INTR_PAR); 554 DELAY(1); 555 bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_STROBE, 1); 556 parsend_pending = 1; 557 } 558 559 splx(s); 560 561 return error; 562 } 563 564 565 int 566 parsend(struct par_softc *sc, u_char *buf, int len) 567 { 568 int err, orig_len = len; 569 570 for (; len; len--, buf++) 571 if ((err = parsendch(sc, *buf))) 572 return err < 0 ? -EINTR : -err; 573 574 /* either all or nothing.. */ 575 return orig_len; 576 } 577
Indexes created Mon Sep 29 21:09:56 GMT 2025