par.c revision 1.44
1 /* $NetBSD: par.c,v 1.44 2022/05/26 14:33:29 tsutsui 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 1.44 2022/05/26 14:33:29 tsutsui 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 #include "ioconf.h" 60 61 struct par_softc { 62 device_t sc_dev; 63 64 bus_space_tag_t sc_bst; 65 bus_space_handle_t sc_bsh; 66 int sc_flags; 67 struct parparam sc_param; 68 #define sc_burst sc_param.burst 69 #define sc_timo sc_param.timo 70 #define sc_delay sc_param.delay 71 struct callout sc_timo_ch; 72 struct callout sc_start_ch; 73 } ; 74 75 /* par registers */ 76 #define PAR_DATA 1 77 #define PAR_STROBE 3 78 79 /* sc_flags values */ 80 #define PARF_ALIVE 0x01 81 #define PARF_OPEN 0x02 82 #define PARF_UIO 0x04 83 #define PARF_TIMO 0x08 84 #define PARF_DELAY 0x10 85 #define PARF_OREAD 0x40 /* no support */ 86 #define PARF_OWRITE 0x80 87 88 89 void partimo(void *); 90 void parstart(void *); 91 void parintr(void *); 92 int parrw(dev_t, struct uio *); 93 int parhztoms(int); 94 int parmstohz(int); 95 int parsendch(struct par_softc *, u_char); 96 int parsend(struct par_softc *, u_char *, int); 97 98 static struct callout intr_callout; 99 100 #define UNIT(x) minor(x) 101 102 #ifdef DEBUG 103 #define PDB_FOLLOW 0x01 104 #define PDB_IO 0x02 105 #define PDB_INTERRUPT 0x04 106 #define PDB_NOCHECK 0x80 107 #ifdef PARDEBUG 108 int pardebug = PDB_FOLLOW | PDB_IO | PDB_INTERRUPT; 109 #else 110 int pardebug = 0; 111 #endif 112 #endif 113 114 int parmatch(device_t, cfdata_t, void *); 115 void parattach(device_t, device_t, void *); 116 117 CFATTACH_DECL_NEW(par, sizeof(struct par_softc), 118 parmatch, parattach, NULL, NULL); 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_discard = nodiscard, 139 .d_flag = 0 140 }; 141 142 int 143 parmatch(device_t parent, cfdata_t cf, void *aux) 144 { 145 struct intio_attach_args *ia = aux; 146 147 /* X680x0 has only one parallel port */ 148 if (strcmp(ia->ia_name, "par") || par_attached) 149 return 0; 150 151 if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) 152 ia->ia_addr = 0xe8c000; 153 ia->ia_size = 0x2000; 154 if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY)) 155 return 0; 156 if (ia->ia_intr == INTIOCF_INTR_DEFAULT) 157 ia->ia_intr = 99; 158 #if DIAGNOSTIC 159 if (ia->ia_intr != 99) 160 return 0; 161 #endif 162 163 return 1; 164 } 165 166 void 167 parattach(device_t parent, device_t self, void *aux) 168 { 169 struct par_softc *sc = device_private(self); 170 struct intio_attach_args *ia = aux; 171 int r __diagused; 172 173 par_attached = 1; 174 175 sc->sc_dev = self; 176 sc->sc_flags = PARF_ALIVE; 177 aprint_normal(": parallel port (write only, interrupt)\n"); 178 ia->ia_size = 0x2000; 179 r = intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE); 180 #ifdef DIAGNOSTIC 181 if (r) 182 panic("IO map for PAR corruption??"); 183 #endif 184 sc->sc_bst = ia->ia_bst; 185 r = bus_space_map(sc->sc_bst, 186 ia->ia_addr, ia->ia_size, 187 BUS_SPACE_MAP_SHIFTED, 188 &sc->sc_bsh); 189 #ifdef DIAGNOSTIC 190 if (r) 191 panic("Cannot map IO space for PAR."); 192 #endif 193 194 intio_set_sicilian_intr(intio_get_sicilian_intr() & 195 ~SICILIAN_INTR_PAR); 196 197 intio_intr_establish(ia->ia_intr, "par", 198 (intio_intr_handler_t)parintr, (void *)1); 199 200 callout_init(&sc->sc_timo_ch, 0); 201 callout_init(&sc->sc_start_ch, 0); 202 callout_init(&intr_callout, 0); 203 } 204 205 int 206 paropen(dev_t dev, int flags, int mode, struct lwp *l) 207 { 208 int unit = UNIT(dev); 209 struct par_softc *sc; 210 211 sc = device_lookup_private(&par_cd, unit); 212 if (sc == NULL || !(sc->sc_flags & PARF_ALIVE)) 213 return(ENXIO); 214 if (sc->sc_flags & PARF_OPEN) 215 return(EBUSY); 216 /* X680x0 can't read */ 217 if ((flags & FREAD) == FREAD) 218 return (EINVAL); 219 220 sc->sc_flags |= PARF_OPEN; 221 222 sc->sc_flags |= PARF_OWRITE; 223 224 sc->sc_burst = PAR_BURST; 225 sc->sc_timo = parmstohz(PAR_TIMO); 226 sc->sc_delay = parmstohz(PAR_DELAY); 227 228 return(0); 229 } 230 231 int 232 parclose(dev_t dev, int flags, int mode, struct lwp *l) 233 { 234 int unit = UNIT(dev); 235 int s; 236 struct par_softc *sc = device_lookup_private(&par_cd, unit); 237 238 sc->sc_flags &= ~(PARF_OPEN|PARF_OWRITE); 239 240 /* don't allow interrupts any longer */ 241 s = spl1(); 242 intio_set_sicilian_intr(intio_get_sicilian_intr() & 243 ~SICILIAN_INTR_PAR); 244 splx(s); 245 246 return (0); 247 } 248 249 void 250 parstart(void *arg) 251 { 252 struct par_softc *sc = arg; 253 #ifdef DEBUG 254 if (pardebug & PDB_FOLLOW) 255 printf("parstart(%x)\n", device_unit(sc->sc_dev)); 256 #endif 257 sc->sc_flags &= ~PARF_DELAY; 258 wakeup(sc); 259 } 260 261 void 262 partimo(void *arg) 263 { 264 struct par_softc *sc = arg; 265 #ifdef DEBUG 266 if (pardebug & PDB_FOLLOW) 267 printf("partimo(%x)\n", device_unit(sc->sc_dev)); 268 #endif 269 sc->sc_flags &= ~(PARF_UIO|PARF_TIMO); 270 wakeup(sc); 271 } 272 273 int 274 parwrite(dev_t dev, struct uio *uio, int flag) 275 { 276 277 #ifdef DEBUG 278 if (pardebug & PDB_FOLLOW) 279 printf("parwrite(%x, %p)\n", UNIT(dev), uio); 280 #endif 281 return (parrw(dev, uio)); 282 } 283 284 int 285 parrw(dev_t dev, struct uio *uio) 286 { 287 int unit = UNIT(dev); 288 struct par_softc *sc = device_lookup_private(&par_cd, unit); 289 int len=0xdeadbeef; /* XXX: shutup gcc */ 290 int s, cnt=0; 291 char *cp; 292 int error = 0; 293 int buflen; 294 char *buf; 295 296 if (!!(sc->sc_flags & PARF_OREAD) ^ (uio->uio_rw == UIO_READ)) 297 return EINVAL; 298 299 if (uio->uio_resid == 0) 300 return(0); 301 302 buflen = uimin(sc->sc_burst, uio->uio_resid); 303 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 304 sc->sc_flags |= PARF_UIO; 305 if (sc->sc_timo > 0) { 306 sc->sc_flags |= PARF_TIMO; 307 callout_reset(&sc->sc_timo_ch, sc->sc_timo, partimo, sc); 308 } 309 while (uio->uio_resid > 0) { 310 len = uimin(buflen, uio->uio_resid); 311 cp = buf; 312 if (uio->uio_rw == UIO_WRITE) { 313 error = uiomove(cp, len, uio); 314 if (error) 315 break; 316 } 317 again: 318 s = splsoftclock(); 319 /* 320 * Check if we timed out during sleep or uiomove 321 */ 322 if ((sc->sc_flags & PARF_UIO) == 0) { 323 #ifdef DEBUG 324 if (pardebug & PDB_IO) 325 printf("parrw: uiomove/sleep timo, flags %x\n", 326 sc->sc_flags); 327 #endif 328 if (sc->sc_flags & PARF_TIMO) { 329 callout_stop(&sc->sc_timo_ch); 330 sc->sc_flags &= ~PARF_TIMO; 331 } 332 splx(s); 333 break; 334 } 335 splx(s); 336 /* 337 * Perform the operation 338 */ 339 cnt = parsend(sc, cp, len); 340 if (cnt < 0) { 341 error = -cnt; 342 break; 343 } 344 345 s = splsoftclock(); 346 /* 347 * Operation timeout (or non-blocking), quit now. 348 */ 349 if ((sc->sc_flags & PARF_UIO) == 0) { 350 #ifdef DEBUG 351 if (pardebug & PDB_IO) 352 printf("parrw: timeout/done\n"); 353 #endif 354 splx(s); 355 break; 356 } 357 /* 358 * Implement inter-read delay 359 */ 360 if (sc->sc_delay > 0) { 361 sc->sc_flags |= PARF_DELAY; 362 callout_reset(&sc->sc_start_ch, sc->sc_delay, 363 parstart, sc); 364 error = tsleep(sc, PCATCH|(PZERO-1), "par-cdelay", 0); 365 if (error) { 366 splx(s); 367 break; 368 } 369 } 370 splx(s); 371 /* 372 * Must not call uiomove again til we've used all data 373 * that we already grabbed. 374 */ 375 if (uio->uio_rw == UIO_WRITE && cnt != len) { 376 cp += cnt; 377 len -= cnt; 378 cnt = 0; 379 goto again; 380 } 381 } 382 s = splsoftclock(); 383 if (sc->sc_flags & PARF_TIMO) { 384 callout_stop(&sc->sc_timo_ch); 385 sc->sc_flags &= ~PARF_TIMO; 386 } 387 if (sc->sc_flags & PARF_DELAY) { 388 callout_stop(&sc->sc_start_ch); 389 sc->sc_flags &= ~PARF_DELAY; 390 } 391 splx(s); 392 /* 393 * Adjust for those chars that we uiomove'ed but never wrote 394 */ 395 /* 396 * XXXjdolecek: this len usage is wrong, this will be incorrect 397 * if the transfer size is longer than sc_burst 398 */ 399 if (uio->uio_rw == UIO_WRITE && cnt != len) { 400 uio->uio_resid += (len - cnt); 401 #ifdef DEBUG 402 if (pardebug & PDB_IO) 403 printf("parrw: short write, adjust by %d\n", 404 len-cnt); 405 #endif 406 } 407 free(buf, M_DEVBUF); 408 #ifdef DEBUG 409 if (pardebug & (PDB_FOLLOW|PDB_IO)) 410 printf("parrw: return %d, resid %d\n", error, uio->uio_resid); 411 #endif 412 return (error); 413 } 414 415 int 416 parioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 417 { 418 struct par_softc *sc = device_lookup_private(&par_cd, UNIT(dev)); 419 struct parparam *pp, *upp; 420 int error = 0; 421 422 switch (cmd) { 423 case PARIOCGPARAM: 424 pp = &sc->sc_param; 425 upp = (struct parparam *)data; 426 upp->burst = pp->burst; 427 upp->timo = parhztoms(pp->timo); 428 upp->delay = parhztoms(pp->delay); 429 break; 430 431 case PARIOCSPARAM: 432 pp = &sc->sc_param; 433 upp = (struct parparam *)data; 434 if (upp->burst < PAR_BURST_MIN || upp->burst > PAR_BURST_MAX || 435 upp->delay < PAR_DELAY_MIN || upp->delay > PAR_DELAY_MAX) 436 return(EINVAL); 437 pp->burst = upp->burst; 438 pp->timo = parmstohz(upp->timo); 439 pp->delay = parmstohz(upp->delay); 440 break; 441 442 default: 443 return(EINVAL); 444 } 445 return (error); 446 } 447 448 int 449 parhztoms(int h) 450 { 451 int m = h; 452 453 if (m > 0) 454 m = m * 1000 / hz; 455 return(m); 456 } 457 458 int 459 parmstohz(int m) 460 { 461 int h = m; 462 463 if (h > 0) { 464 h = h * hz / 1000; 465 if (h == 0) 466 h = 1000 / hz; 467 } 468 return(h); 469 } 470 471 /* stuff below here if for interrupt driven output of data thru 472 the parallel port. */ 473 474 int partimeout_pending; 475 int parsend_pending; 476 477 void 478 parintr(void *arg) 479 { 480 int s, mask; 481 482 mask = (int)arg; 483 s = splclock(); 484 485 intio_set_sicilian_intr(intio_get_sicilian_intr() & 486 ~SICILIAN_INTR_PAR); 487 488 #ifdef DEBUG 489 if (pardebug & PDB_INTERRUPT) 490 printf("parintr %d(%s)\n", mask, mask ? "FLG" : "tout"); 491 #endif 492 /* if invoked from timeout handler, mask will be 0, 493 * if from interrupt, it will contain the cia-icr mask, 494 * which is != 0 495 */ 496 if (mask) { 497 if (partimeout_pending) 498 callout_stop(&intr_callout); 499 if (parsend_pending) 500 parsend_pending = 0; 501 } 502 503 /* either way, there won't be a timeout pending any longer */ 504 partimeout_pending = 0; 505 506 wakeup(parintr); 507 splx(s); 508 } 509 510 int 511 parsendch(struct par_softc *sc, u_char ch) 512 { 513 int error = 0; 514 int s; 515 516 /* if either offline, busy or out of paper, wait for that 517 condition to clear */ 518 s = spl1(); 519 while (!error 520 && (parsend_pending 521 || !(intio_get_sicilian_intr() & SICILIAN_STAT_PAR))) 522 { 523 /* wait a second, and try again */ 524 callout_reset(&intr_callout, hz, parintr, 0); 525 partimeout_pending = 1; 526 /* this is essentially a flipflop to have us wait for the 527 first character being transmitted when trying to transmit 528 the second, etc. */ 529 parsend_pending = 0; 530 /* it's quite important that a parallel putc can be 531 interrupted, given the possibility to lock a printer 532 in an offline condition.. */ 533 if ((error = tsleep(parintr, PCATCH|(PZERO-1), "parsendch", 0))) { 534 #ifdef DEBUG 535 if (pardebug & PDB_INTERRUPT) 536 printf("parsendch interrupted, error = %d\n", error); 537 #endif 538 if (partimeout_pending) 539 callout_stop(&intr_callout); 540 541 partimeout_pending = 0; 542 } 543 } 544 545 if (!error) { 546 #ifdef DEBUG 547 if (pardebug & PDB_INTERRUPT) 548 printf("#%d", ch); 549 #endif 550 bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_DATA, ch); 551 DELAY(1); /* (DELAY(1) == 1us) > 0.5us */ 552 bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_STROBE, 0); 553 intio_set_sicilian_intr(intio_get_sicilian_intr() | 554 SICILIAN_INTR_PAR); 555 DELAY(1); 556 bus_space_write_1(sc->sc_bst, sc->sc_bsh, PAR_STROBE, 1); 557 parsend_pending = 1; 558 } 559 560 splx(s); 561 562 return error; 563 } 564 565 566 int 567 parsend(struct par_softc *sc, u_char *buf, int len) 568 { 569 int err, orig_len = len; 570 571 for (; len; len--, buf++) 572 if ((err = parsendch(sc, *buf))) 573 return err < 0 ? -EINTR : -err; 574 575 /* either all or nothing.. */ 576 return orig_len; 577 } 578
Indexes created Mon Sep 29 03:10:08 GMT 2025