ppi.c revision 1.23
1 /* $NetBSD: ppi.c,v 1.23 2002/10/02 05:15:54 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1982, 1990, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)ppi.c 8.1 (Berkeley) 6/16/93 72 */ 73 74 /* 75 * Printer/Plotter HPIB interface 76 */ 77 78 #include <sys/cdefs.h> 79 __KERNEL_RCSID(0, "$NetBSD: ppi.c,v 1.23 2002/10/02 05:15:54 thorpej Exp $"); 80 81 #include <sys/param.h> 82 #include <sys/systm.h> 83 #include <sys/callout.h> 84 #include <sys/conf.h> 85 #include <sys/device.h> 86 #include <sys/errno.h> 87 #include <sys/malloc.h> 88 #include <sys/proc.h> 89 #include <sys/uio.h> 90 91 #include <hp300/dev/hpibvar.h> 92 93 #include <hp300/dev/ppiioctl.h> 94 95 struct ppi_softc { 96 struct device sc_dev; 97 int sc_flags; 98 struct hpibqueue sc_hq; /* HP-IB job queue entry */ 99 struct ppiparam sc_param; 100 #define sc_burst sc_param.burst 101 #define sc_timo sc_param.timo 102 #define sc_delay sc_param.delay 103 int sc_sec; 104 int sc_slave; /* HP-IB slave address */ 105 struct callout sc_timo_ch; 106 struct callout sc_start_ch; 107 }; 108 109 /* sc_flags values */ 110 #define PPIF_ALIVE 0x01 111 #define PPIF_OPEN 0x02 112 #define PPIF_UIO 0x04 113 #define PPIF_TIMO 0x08 114 #define PPIF_DELAY 0x10 115 116 int ppimatch __P((struct device *, struct cfdata *, void *)); 117 void ppiattach __P((struct device *, struct device *, void *)); 118 119 CFATTACH_DECL(ppi, sizeof(struct ppi_softc), 120 ppimatch, ppiattach, NULL, NULL); 121 122 extern struct cfdriver ppi_cd; 123 124 dev_type_open(ppiopen); 125 dev_type_close(ppiclose); 126 dev_type_read(ppiread); 127 dev_type_write(ppiwrite); 128 dev_type_ioctl(ppiioctl); 129 130 const struct cdevsw ppi_cdevsw = { 131 ppiopen, ppiclose, ppiread, ppiwrite, ppiioctl, 132 nostop, notty, nopoll, nommap, 133 }; 134 135 void ppistart __P((void *)); 136 void ppinoop __P((void *)); 137 138 void ppitimo __P((void *)); 139 int ppirw __P((dev_t, struct uio *)); 140 int ppihztoms __P((int)); 141 int ppimstohz __P((int)); 142 143 #define UNIT(x) minor(x) 144 145 #ifdef DEBUG 146 int ppidebug = 0x80; 147 #define PDB_FOLLOW 0x01 148 #define PDB_IO 0x02 149 #define PDB_NOCHECK 0x80 150 #endif 151 152 int 153 ppimatch(parent, match, aux) 154 struct device *parent; 155 struct cfdata *match; 156 void *aux; 157 { 158 struct hpibbus_attach_args *ha = aux; 159 160 /* 161 * The printer/plotter doesn't return an ID tag. 162 * The check below prevents us from matching a CS80 163 * device by mistake. 164 */ 165 if (ha->ha_id & 0x200) 166 return (0); 167 168 /* 169 * To prevent matching all unused slots on the bus, we 170 * don't allow wildcarded locators. 171 */ 172 if (match->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || 173 match->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) 174 return (0); 175 176 return (1); 177 } 178 179 void 180 ppiattach(parent, self, aux) 181 struct device *parent, *self; 182 void *aux; 183 { 184 struct ppi_softc *sc = (struct ppi_softc *)self; 185 struct hpibbus_attach_args *ha = aux; 186 187 printf("\n"); 188 189 sc->sc_slave = ha->ha_slave; 190 191 callout_init(&sc->sc_timo_ch); 192 callout_init(&sc->sc_start_ch); 193 194 /* Initialize the hpib queue entry. */ 195 sc->sc_hq.hq_softc = sc; 196 sc->sc_hq.hq_slave = sc->sc_slave; 197 sc->sc_hq.hq_start = ppistart; 198 sc->sc_hq.hq_go = ppinoop; 199 sc->sc_hq.hq_intr = ppinoop; 200 201 sc->sc_flags = PPIF_ALIVE; 202 } 203 204 void 205 ppinoop(arg) 206 void *arg; 207 { 208 /* Noop! */ 209 } 210 211 int 212 ppiopen(dev, flags, fmt, p) 213 dev_t dev; 214 int flags, fmt; 215 struct proc *p; 216 { 217 int unit = UNIT(dev); 218 struct ppi_softc *sc; 219 220 if (unit >= ppi_cd.cd_ndevs || 221 (sc = ppi_cd.cd_devs[unit]) == NULL || 222 (sc->sc_flags & PPIF_ALIVE) == 0) 223 return (ENXIO); 224 225 #ifdef DEBUG 226 if (ppidebug & PDB_FOLLOW) 227 printf("ppiopen(%x, %x): flags %x\n", 228 dev, flags, sc->sc_flags); 229 #endif 230 if (sc->sc_flags & PPIF_OPEN) 231 return (EBUSY); 232 sc->sc_flags |= PPIF_OPEN; 233 sc->sc_burst = PPI_BURST; 234 sc->sc_timo = ppimstohz(PPI_TIMO); 235 sc->sc_delay = ppimstohz(PPI_DELAY); 236 sc->sc_sec = -1; 237 return(0); 238 } 239 240 int 241 ppiclose(dev, flags, fmt, p) 242 dev_t dev; 243 int flags, fmt; 244 struct proc *p; 245 { 246 int unit = UNIT(dev); 247 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 248 249 #ifdef DEBUG 250 if (ppidebug & PDB_FOLLOW) 251 printf("ppiclose(%x, %x): flags %x\n", 252 dev, flags, sc->sc_flags); 253 #endif 254 sc->sc_flags &= ~PPIF_OPEN; 255 return(0); 256 } 257 258 void 259 ppistart(arg) 260 void *arg; 261 { 262 struct ppi_softc *sc = arg; 263 264 #ifdef DEBUG 265 if (ppidebug & PDB_FOLLOW) 266 printf("ppistart(%x)\n", sc->sc_dev.dv_unit); 267 #endif 268 sc->sc_flags &= ~PPIF_DELAY; 269 wakeup(sc); 270 } 271 272 void 273 ppitimo(arg) 274 void *arg; 275 { 276 struct ppi_softc *sc = arg; 277 278 #ifdef DEBUG 279 if (ppidebug & PDB_FOLLOW) 280 printf("ppitimo(%x)\n", sc->sc_dev.dv_unit); 281 #endif 282 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 283 wakeup(sc); 284 } 285 286 int 287 ppiread(dev, uio, flags) 288 dev_t dev; 289 struct uio *uio; 290 int flags; 291 { 292 293 #ifdef DEBUG 294 if (ppidebug & PDB_FOLLOW) 295 printf("ppiread(%x, %p)\n", dev, uio); 296 #endif 297 return (ppirw(dev, uio)); 298 } 299 300 int 301 ppiwrite(dev, uio, flags) 302 dev_t dev; 303 struct uio *uio; 304 int flags; 305 { 306 307 #ifdef DEBUG 308 if (ppidebug & PDB_FOLLOW) 309 printf("ppiwrite(%x, %p)\n", dev, uio); 310 #endif 311 return (ppirw(dev, uio)); 312 } 313 314 int 315 ppirw(dev, uio) 316 dev_t dev; 317 struct uio *uio; 318 { 319 int unit = UNIT(dev); 320 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 321 int s, len, cnt; 322 char *cp; 323 int error = 0, gotdata = 0; 324 int buflen, ctlr, slave; 325 char *buf; 326 327 if (uio->uio_resid == 0) 328 return(0); 329 330 ctlr = sc->sc_dev.dv_parent->dv_unit; 331 slave = sc->sc_slave; 332 333 #ifdef DEBUG 334 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 335 printf("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 336 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 337 sc->sc_burst, sc->sc_timo, uio->uio_resid); 338 #endif 339 buflen = min(sc->sc_burst, uio->uio_resid); 340 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 341 sc->sc_flags |= PPIF_UIO; 342 if (sc->sc_timo > 0) { 343 sc->sc_flags |= PPIF_TIMO; 344 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 345 } 346 len = cnt = 0; 347 while (uio->uio_resid > 0) { 348 len = min(buflen, uio->uio_resid); 349 cp = buf; 350 if (uio->uio_rw == UIO_WRITE) { 351 error = uiomove(cp, len, uio); 352 if (error) 353 break; 354 } 355 again: 356 s = splbio(); 357 if ((sc->sc_flags & PPIF_UIO) && 358 hpibreq(sc->sc_dev.dv_parent, &sc->sc_hq) == 0) 359 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 360 /* 361 * Check if we timed out during sleep or uiomove 362 */ 363 (void) spllowersoftclock(); 364 if ((sc->sc_flags & PPIF_UIO) == 0) { 365 #ifdef DEBUG 366 if (ppidebug & PDB_IO) 367 printf("ppirw: uiomove/sleep timo, flags %x\n", 368 sc->sc_flags); 369 #endif 370 if (sc->sc_flags & PPIF_TIMO) { 371 callout_stop(&sc->sc_timo_ch); 372 sc->sc_flags &= ~PPIF_TIMO; 373 } 374 splx(s); 375 break; 376 } 377 splx(s); 378 /* 379 * Perform the operation 380 */ 381 if (uio->uio_rw == UIO_WRITE) 382 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 383 else 384 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 385 s = splbio(); 386 hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq); 387 #ifdef DEBUG 388 if (ppidebug & PDB_IO) 389 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 390 uio->uio_rw == UIO_READ ? "recv" : "send", 391 ctlr, slave, sc->sc_sec, cp, len, cnt); 392 #endif 393 splx(s); 394 if (uio->uio_rw == UIO_READ) { 395 if (cnt) { 396 error = uiomove(cp, cnt, uio); 397 if (error) 398 break; 399 gotdata++; 400 } 401 /* 402 * Didn't get anything this time, but did in the past. 403 * Consider us done. 404 */ 405 else if (gotdata) 406 break; 407 } 408 s = splsoftclock(); 409 /* 410 * Operation timeout (or non-blocking), quit now. 411 */ 412 if ((sc->sc_flags & PPIF_UIO) == 0) { 413 #ifdef DEBUG 414 if (ppidebug & PDB_IO) 415 printf("ppirw: timeout/done\n"); 416 #endif 417 splx(s); 418 break; 419 } 420 /* 421 * Implement inter-read delay 422 */ 423 if (sc->sc_delay > 0) { 424 sc->sc_flags |= PPIF_DELAY; 425 callout_reset(&sc->sc_start_ch, sc->sc_delay, 426 ppistart, sc); 427 error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); 428 if (error) { 429 splx(s); 430 break; 431 } 432 } 433 splx(s); 434 /* 435 * Must not call uiomove again til we've used all data 436 * that we already grabbed. 437 */ 438 if (uio->uio_rw == UIO_WRITE && cnt != len) { 439 cp += cnt; 440 len -= cnt; 441 cnt = 0; 442 goto again; 443 } 444 } 445 s = splsoftclock(); 446 if (sc->sc_flags & PPIF_TIMO) { 447 callout_stop(&sc->sc_timo_ch); 448 sc->sc_flags &= ~PPIF_TIMO; 449 } 450 if (sc->sc_flags & PPIF_DELAY) { 451 callout_stop(&sc->sc_start_ch); 452 sc->sc_flags &= ~PPIF_DELAY; 453 } 454 splx(s); 455 /* 456 * Adjust for those chars that we uiomove'ed but never wrote 457 */ 458 if (uio->uio_rw == UIO_WRITE && cnt != len) { 459 uio->uio_resid += (len - cnt); 460 #ifdef DEBUG 461 if (ppidebug & PDB_IO) 462 printf("ppirw: short write, adjust by %d\n", 463 len-cnt); 464 #endif 465 } 466 free(buf, M_DEVBUF); 467 #ifdef DEBUG 468 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 469 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 470 #endif 471 return (error); 472 } 473 474 int 475 ppiioctl(dev, cmd, data, flag, p) 476 dev_t dev; 477 u_long cmd; 478 caddr_t data; 479 int flag; 480 struct proc *p; 481 { 482 struct ppi_softc *sc = ppi_cd.cd_devs[UNIT(dev)]; 483 struct ppiparam *pp, *upp; 484 int error = 0; 485 486 switch (cmd) { 487 case PPIIOCGPARAM: 488 pp = &sc->sc_param; 489 upp = (struct ppiparam *)data; 490 upp->burst = pp->burst; 491 upp->timo = ppihztoms(pp->timo); 492 upp->delay = ppihztoms(pp->delay); 493 break; 494 case PPIIOCSPARAM: 495 pp = &sc->sc_param; 496 upp = (struct ppiparam *)data; 497 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 498 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 499 return(EINVAL); 500 pp->burst = upp->burst; 501 pp->timo = ppimstohz(upp->timo); 502 pp->delay = ppimstohz(upp->delay); 503 break; 504 case PPIIOCSSEC: 505 sc->sc_sec = *(int *)data; 506 break; 507 default: 508 return(EINVAL); 509 } 510 return (error); 511 } 512 513 int 514 ppihztoms(h) 515 int h; 516 { 517 extern int hz; 518 int m = h; 519 520 if (m > 0) 521 m = m * 1000 / hz; 522 return(m); 523 } 524 525 int 526 ppimstohz(m) 527 int m; 528 { 529 extern int hz; 530 int h = m; 531 532 if (h > 0) { 533 h = h * hz / 1000; 534 if (h == 0) 535 h = 1000 / hz; 536 } 537 return(h); 538 } 539
Indexes created Wed Oct 01 18:09:54 GMT 2025