ppi.c revision 1.19
1 /* $NetBSD: ppi.c,v 1.19 2000/05/27 04:52:27 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/param.h> 79 #include <sys/systm.h> 80 #include <sys/callout.h> 81 #include <sys/conf.h> 82 #include <sys/device.h> 83 #include <sys/errno.h> 84 #include <sys/malloc.h> 85 #include <sys/proc.h> 86 #include <sys/uio.h> 87 88 #include <hp300/dev/hpibvar.h> 89 90 #include <hp300/dev/ppiioctl.h> 91 92 struct ppi_softc { 93 struct device sc_dev; 94 int sc_flags; 95 struct hpibqueue sc_hq; /* HP-IB job queue entry */ 96 struct ppiparam sc_param; 97 #define sc_burst sc_param.burst 98 #define sc_timo sc_param.timo 99 #define sc_delay sc_param.delay 100 int sc_sec; 101 int sc_slave; /* HP-IB slave address */ 102 struct callout sc_timo_ch; 103 struct callout sc_start_ch; 104 }; 105 106 /* sc_flags values */ 107 #define PPIF_ALIVE 0x01 108 #define PPIF_OPEN 0x02 109 #define PPIF_UIO 0x04 110 #define PPIF_TIMO 0x08 111 #define PPIF_DELAY 0x10 112 113 int ppimatch __P((struct device *, struct cfdata *, void *)); 114 void ppiattach __P((struct device *, struct device *, void *)); 115 116 struct cfattach ppi_ca = { 117 sizeof(struct ppi_softc), ppimatch, ppiattach 118 }; 119 120 extern struct cfdriver ppi_cd; 121 122 void ppistart __P((void *)); 123 void ppinoop __P((void *)); 124 125 void ppitimo __P((void *)); 126 int ppirw __P((dev_t, struct uio *)); 127 int ppihztoms __P((int)); 128 int ppimstohz __P((int)); 129 130 bdev_decl(ppi); 131 cdev_decl(ppi); 132 133 #define UNIT(x) minor(x) 134 135 #ifdef DEBUG 136 int ppidebug = 0x80; 137 #define PDB_FOLLOW 0x01 138 #define PDB_IO 0x02 139 #define PDB_NOCHECK 0x80 140 #endif 141 142 int 143 ppimatch(parent, match, aux) 144 struct device *parent; 145 struct cfdata *match; 146 void *aux; 147 { 148 struct hpibbus_attach_args *ha = aux; 149 150 /* 151 * The printer/plotter doesn't return an ID tag. 152 * The check below prevents us from matching a CS80 153 * device by mistake. 154 */ 155 if (ha->ha_id & 0x200) 156 return (0); 157 158 /* 159 * To prevent matching all unused slots on the bus, we 160 * don't allow wildcarded locators. 161 */ 162 if (match->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || 163 match->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) 164 return (0); 165 166 return (1); 167 } 168 169 void 170 ppiattach(parent, self, aux) 171 struct device *parent, *self; 172 void *aux; 173 { 174 struct ppi_softc *sc = (struct ppi_softc *)self; 175 struct hpibbus_attach_args *ha = aux; 176 177 printf("\n"); 178 179 sc->sc_slave = ha->ha_slave; 180 181 callout_init(&sc->sc_timo_ch); 182 callout_init(&sc->sc_start_ch); 183 184 /* Initialize the hpib queue entry. */ 185 sc->sc_hq.hq_softc = sc; 186 sc->sc_hq.hq_slave = sc->sc_slave; 187 sc->sc_hq.hq_start = ppistart; 188 sc->sc_hq.hq_go = ppinoop; 189 sc->sc_hq.hq_intr = ppinoop; 190 191 sc->sc_flags = PPIF_ALIVE; 192 } 193 194 void 195 ppinoop(arg) 196 void *arg; 197 { 198 /* Noop! */ 199 } 200 201 int 202 ppiopen(dev, flags, fmt, p) 203 dev_t dev; 204 int flags, fmt; 205 struct proc *p; 206 { 207 int unit = UNIT(dev); 208 struct ppi_softc *sc; 209 210 if (unit >= ppi_cd.cd_ndevs || 211 (sc = ppi_cd.cd_devs[unit]) == NULL || 212 (sc->sc_flags & PPIF_ALIVE) == 0) 213 return (ENXIO); 214 215 #ifdef DEBUG 216 if (ppidebug & PDB_FOLLOW) 217 printf("ppiopen(%x, %x): flags %x\n", 218 dev, flags, sc->sc_flags); 219 #endif 220 if (sc->sc_flags & PPIF_OPEN) 221 return (EBUSY); 222 sc->sc_flags |= PPIF_OPEN; 223 sc->sc_burst = PPI_BURST; 224 sc->sc_timo = ppimstohz(PPI_TIMO); 225 sc->sc_delay = ppimstohz(PPI_DELAY); 226 sc->sc_sec = -1; 227 return(0); 228 } 229 230 int 231 ppiclose(dev, flags, fmt, p) 232 dev_t dev; 233 int flags, fmt; 234 struct proc *p; 235 { 236 int unit = UNIT(dev); 237 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 238 239 #ifdef DEBUG 240 if (ppidebug & PDB_FOLLOW) 241 printf("ppiclose(%x, %x): flags %x\n", 242 dev, flags, sc->sc_flags); 243 #endif 244 sc->sc_flags &= ~PPIF_OPEN; 245 return(0); 246 } 247 248 void 249 ppistart(arg) 250 void *arg; 251 { 252 struct ppi_softc *sc = arg; 253 254 #ifdef DEBUG 255 if (ppidebug & PDB_FOLLOW) 256 printf("ppistart(%x)\n", sc->sc_dev.dv_unit); 257 #endif 258 sc->sc_flags &= ~PPIF_DELAY; 259 wakeup(sc); 260 } 261 262 void 263 ppitimo(arg) 264 void *arg; 265 { 266 struct ppi_softc *sc = arg; 267 268 #ifdef DEBUG 269 if (ppidebug & PDB_FOLLOW) 270 printf("ppitimo(%x)\n", sc->sc_dev.dv_unit); 271 #endif 272 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 273 wakeup(sc); 274 } 275 276 int 277 ppiread(dev, uio, flags) 278 dev_t dev; 279 struct uio *uio; 280 int flags; 281 { 282 283 #ifdef DEBUG 284 if (ppidebug & PDB_FOLLOW) 285 printf("ppiread(%x, %p)\n", dev, uio); 286 #endif 287 return (ppirw(dev, uio)); 288 } 289 290 int 291 ppiwrite(dev, uio, flags) 292 dev_t dev; 293 struct uio *uio; 294 int flags; 295 { 296 297 #ifdef DEBUG 298 if (ppidebug & PDB_FOLLOW) 299 printf("ppiwrite(%x, %p)\n", dev, uio); 300 #endif 301 return (ppirw(dev, uio)); 302 } 303 304 int 305 ppirw(dev, uio) 306 dev_t dev; 307 struct uio *uio; 308 { 309 int unit = UNIT(dev); 310 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 311 int s, len, cnt; 312 char *cp; 313 int error = 0, gotdata = 0; 314 int buflen, ctlr, slave; 315 char *buf; 316 317 if (uio->uio_resid == 0) 318 return(0); 319 320 ctlr = sc->sc_dev.dv_parent->dv_unit; 321 slave = sc->sc_slave; 322 323 #ifdef DEBUG 324 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 325 printf("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 326 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 327 sc->sc_burst, sc->sc_timo, uio->uio_resid); 328 #endif 329 buflen = min(sc->sc_burst, uio->uio_resid); 330 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 331 sc->sc_flags |= PPIF_UIO; 332 if (sc->sc_timo > 0) { 333 sc->sc_flags |= PPIF_TIMO; 334 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 335 } 336 len = cnt = 0; 337 while (uio->uio_resid > 0) { 338 len = min(buflen, uio->uio_resid); 339 cp = buf; 340 if (uio->uio_rw == UIO_WRITE) { 341 error = uiomove(cp, len, uio); 342 if (error) 343 break; 344 } 345 again: 346 s = splbio(); 347 if ((sc->sc_flags & PPIF_UIO) && 348 hpibreq(sc->sc_dev.dv_parent, &sc->sc_hq) == 0) 349 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 350 /* 351 * Check if we timed out during sleep or uiomove 352 */ 353 (void) spllowersoftclock(); 354 if ((sc->sc_flags & PPIF_UIO) == 0) { 355 #ifdef DEBUG 356 if (ppidebug & PDB_IO) 357 printf("ppirw: uiomove/sleep timo, flags %x\n", 358 sc->sc_flags); 359 #endif 360 if (sc->sc_flags & PPIF_TIMO) { 361 callout_stop(&sc->sc_timo_ch); 362 sc->sc_flags &= ~PPIF_TIMO; 363 } 364 splx(s); 365 break; 366 } 367 splx(s); 368 /* 369 * Perform the operation 370 */ 371 if (uio->uio_rw == UIO_WRITE) 372 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 373 else 374 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 375 s = splbio(); 376 hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq); 377 #ifdef DEBUG 378 if (ppidebug & PDB_IO) 379 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 380 uio->uio_rw == UIO_READ ? "recv" : "send", 381 ctlr, slave, sc->sc_sec, cp, len, cnt); 382 #endif 383 splx(s); 384 if (uio->uio_rw == UIO_READ) { 385 if (cnt) { 386 error = uiomove(cp, cnt, uio); 387 if (error) 388 break; 389 gotdata++; 390 } 391 /* 392 * Didn't get anything this time, but did in the past. 393 * Consider us done. 394 */ 395 else if (gotdata) 396 break; 397 } 398 s = splsoftclock(); 399 /* 400 * Operation timeout (or non-blocking), quit now. 401 */ 402 if ((sc->sc_flags & PPIF_UIO) == 0) { 403 #ifdef DEBUG 404 if (ppidebug & PDB_IO) 405 printf("ppirw: timeout/done\n"); 406 #endif 407 splx(s); 408 break; 409 } 410 /* 411 * Implement inter-read delay 412 */ 413 if (sc->sc_delay > 0) { 414 sc->sc_flags |= PPIF_DELAY; 415 callout_reset(&sc->sc_start_ch, sc->sc_delay, 416 ppistart, sc); 417 error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); 418 if (error) { 419 splx(s); 420 break; 421 } 422 } 423 splx(s); 424 /* 425 * Must not call uiomove again til we've used all data 426 * that we already grabbed. 427 */ 428 if (uio->uio_rw == UIO_WRITE && cnt != len) { 429 cp += cnt; 430 len -= cnt; 431 cnt = 0; 432 goto again; 433 } 434 } 435 s = splsoftclock(); 436 if (sc->sc_flags & PPIF_TIMO) { 437 callout_stop(&sc->sc_timo_ch); 438 sc->sc_flags &= ~PPIF_TIMO; 439 } 440 if (sc->sc_flags & PPIF_DELAY) { 441 callout_stop(&sc->sc_start_ch); 442 sc->sc_flags &= ~PPIF_DELAY; 443 } 444 splx(s); 445 /* 446 * Adjust for those chars that we uiomove'ed but never wrote 447 */ 448 if (uio->uio_rw == UIO_WRITE && cnt != len) { 449 uio->uio_resid += (len - cnt); 450 #ifdef DEBUG 451 if (ppidebug & PDB_IO) 452 printf("ppirw: short write, adjust by %d\n", 453 len-cnt); 454 #endif 455 } 456 free(buf, M_DEVBUF); 457 #ifdef DEBUG 458 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 459 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 460 #endif 461 return (error); 462 } 463 464 int 465 ppiioctl(dev, cmd, data, flag, p) 466 dev_t dev; 467 u_long cmd; 468 caddr_t data; 469 int flag; 470 struct proc *p; 471 { 472 struct ppi_softc *sc = ppi_cd.cd_devs[UNIT(dev)]; 473 struct ppiparam *pp, *upp; 474 int error = 0; 475 476 switch (cmd) { 477 case PPIIOCGPARAM: 478 pp = &sc->sc_param; 479 upp = (struct ppiparam *)data; 480 upp->burst = pp->burst; 481 upp->timo = ppihztoms(pp->timo); 482 upp->delay = ppihztoms(pp->delay); 483 break; 484 case PPIIOCSPARAM: 485 pp = &sc->sc_param; 486 upp = (struct ppiparam *)data; 487 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 488 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 489 return(EINVAL); 490 pp->burst = upp->burst; 491 pp->timo = ppimstohz(upp->timo); 492 pp->delay = ppimstohz(upp->delay); 493 break; 494 case PPIIOCSSEC: 495 sc->sc_sec = *(int *)data; 496 break; 497 default: 498 return(EINVAL); 499 } 500 return (error); 501 } 502 503 int 504 ppihztoms(h) 505 int h; 506 { 507 extern int hz; 508 int m = h; 509 510 if (m > 0) 511 m = m * 1000 / hz; 512 return(m); 513 } 514 515 int 516 ppimstohz(m) 517 int m; 518 { 519 extern int hz; 520 int h = m; 521 522 if (h > 0) { 523 h = h * hz / 1000; 524 if (h == 0) 525 h = 1000 / hz; 526 } 527 return(h); 528 } 529
Indexes created Wed Oct 01 19:09:53 GMT 2025