ppi.c revision 1.15
1 /* $NetBSD: ppi.c,v 1.15 1997/10/04 10:00:23 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/conf.h> 81 #include <sys/device.h> 82 #include <sys/errno.h> 83 #include <sys/malloc.h> 84 #include <sys/proc.h> 85 #include <sys/uio.h> 86 87 #include <hp300/dev/hpibvar.h> 88 89 #include <hp300/dev/ppiioctl.h> 90 91 struct ppi_softc { 92 struct device sc_dev; 93 int sc_flags; 94 struct hpibqueue sc_hq; /* HP-IB job queue entry */ 95 struct ppiparam sc_param; 96 #define sc_burst sc_param.burst 97 #define sc_timo sc_param.timo 98 #define sc_delay sc_param.delay 99 int sc_sec; 100 int sc_slave; /* HP-IB slave address */ 101 }; 102 103 /* sc_flags values */ 104 #define PPIF_ALIVE 0x01 105 #define PPIF_OPEN 0x02 106 #define PPIF_UIO 0x04 107 #define PPIF_TIMO 0x08 108 #define PPIF_DELAY 0x10 109 110 int ppimatch __P((struct device *, struct cfdata *, void *)); 111 void ppiattach __P((struct device *, struct device *, void *)); 112 113 struct cfattach ppi_ca = { 114 sizeof(struct ppi_softc), ppimatch, ppiattach 115 }; 116 117 struct cfdriver ppi_cd = { 118 NULL, "ppi", DV_DULL 119 }; 120 121 void ppistart __P((void *)); 122 void ppinoop __P((void *)); 123 124 void ppitimo __P((void *)); 125 int ppirw __P((dev_t, struct uio *)); 126 int ppihztoms __P((int)); 127 int ppimstohz __P((int)); 128 129 bdev_decl(ppi); 130 cdev_decl(ppi); 131 132 #define UNIT(x) minor(x) 133 134 #ifdef DEBUG 135 int ppidebug = 0x80; 136 #define PDB_FOLLOW 0x01 137 #define PDB_IO 0x02 138 #define PDB_NOCHECK 0x80 139 #endif 140 141 int 142 ppimatch(parent, match, aux) 143 struct device *parent; 144 struct cfdata *match; 145 void *aux; 146 { 147 struct hpibbus_attach_args *ha = aux; 148 149 /* 150 * The printer/plotter doesn't return an ID tag. 151 * The check below prevents us from matching a CS80 152 * device by mistake. 153 */ 154 if (ha->ha_id & 0x200) 155 return (0); 156 157 /* 158 * To prevent matching all unused slots on the bus, we 159 * don't allow wildcarded locators. 160 */ 161 if (match->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || 162 match->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) 163 return (0); 164 165 return (1); 166 } 167 168 void 169 ppiattach(parent, self, aux) 170 struct device *parent, *self; 171 void *aux; 172 { 173 struct ppi_softc *sc = (struct ppi_softc *)self; 174 struct hpibbus_attach_args *ha = aux; 175 176 printf("\n"); 177 178 sc->sc_slave = ha->ha_slave; 179 180 /* Initialize the hpib queue entry. */ 181 sc->sc_hq.hq_softc = sc; 182 sc->sc_hq.hq_slave = sc->sc_slave; 183 sc->sc_hq.hq_start = ppistart; 184 sc->sc_hq.hq_go = ppinoop; 185 sc->sc_hq.hq_intr = ppinoop; 186 187 sc->sc_flags = PPIF_ALIVE; 188 } 189 190 void 191 ppinoop(arg) 192 void *arg; 193 { 194 /* Noop! */ 195 } 196 197 int 198 ppiopen(dev, flags, fmt, p) 199 dev_t dev; 200 int flags, fmt; 201 struct proc *p; 202 { 203 int unit = UNIT(dev); 204 struct ppi_softc *sc; 205 206 if (unit >= ppi_cd.cd_ndevs || 207 (sc = ppi_cd.cd_devs[unit]) == NULL || 208 (sc->sc_flags & PPIF_ALIVE) == 0) 209 return (ENXIO); 210 211 #ifdef DEBUG 212 if (ppidebug & PDB_FOLLOW) 213 printf("ppiopen(%x, %x): flags %x\n", 214 dev, flags, sc->sc_flags); 215 #endif 216 if (sc->sc_flags & PPIF_OPEN) 217 return (EBUSY); 218 sc->sc_flags |= PPIF_OPEN; 219 sc->sc_burst = PPI_BURST; 220 sc->sc_timo = ppimstohz(PPI_TIMO); 221 sc->sc_delay = ppimstohz(PPI_DELAY); 222 sc->sc_sec = -1; 223 return(0); 224 } 225 226 int 227 ppiclose(dev, flags, fmt, p) 228 dev_t dev; 229 int flags, fmt; 230 struct proc *p; 231 { 232 int unit = UNIT(dev); 233 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 234 235 #ifdef DEBUG 236 if (ppidebug & PDB_FOLLOW) 237 printf("ppiclose(%x, %x): flags %x\n", 238 dev, flags, sc->sc_flags); 239 #endif 240 sc->sc_flags &= ~PPIF_OPEN; 241 return(0); 242 } 243 244 void 245 ppistart(arg) 246 void *arg; 247 { 248 struct ppi_softc *sc = arg; 249 250 #ifdef DEBUG 251 if (ppidebug & PDB_FOLLOW) 252 printf("ppistart(%x)\n", sc->sc_dev.dv_unit); 253 #endif 254 sc->sc_flags &= ~PPIF_DELAY; 255 wakeup(sc); 256 } 257 258 void 259 ppitimo(arg) 260 void *arg; 261 { 262 struct ppi_softc *sc = arg; 263 264 #ifdef DEBUG 265 if (ppidebug & PDB_FOLLOW) 266 printf("ppitimo(%x)\n", sc->sc_dev.dv_unit); 267 #endif 268 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 269 wakeup(sc); 270 } 271 272 int 273 ppiread(dev, uio, flags) 274 dev_t dev; 275 struct uio *uio; 276 int flags; 277 { 278 279 #ifdef DEBUG 280 if (ppidebug & PDB_FOLLOW) 281 printf("ppiread(%x, %p)\n", dev, uio); 282 #endif 283 return (ppirw(dev, uio)); 284 } 285 286 int 287 ppiwrite(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("ppiwrite(%x, %p)\n", dev, uio); 296 #endif 297 return (ppirw(dev, uio)); 298 } 299 300 int 301 ppirw(dev, uio) 302 dev_t dev; 303 struct uio *uio; 304 { 305 int unit = UNIT(dev); 306 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 307 int s, len, cnt; 308 char *cp; 309 int error = 0, gotdata = 0; 310 int buflen, ctlr, slave; 311 char *buf; 312 313 if (uio->uio_resid == 0) 314 return(0); 315 316 ctlr = sc->sc_dev.dv_parent->dv_unit; 317 slave = sc->sc_slave; 318 319 #ifdef DEBUG 320 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 321 printf("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 322 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 323 sc->sc_burst, sc->sc_timo, uio->uio_resid); 324 #endif 325 buflen = min(sc->sc_burst, uio->uio_resid); 326 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 327 sc->sc_flags |= PPIF_UIO; 328 if (sc->sc_timo > 0) { 329 sc->sc_flags |= PPIF_TIMO; 330 timeout(ppitimo, sc, sc->sc_timo); 331 } 332 len = cnt = 0; 333 while (uio->uio_resid > 0) { 334 len = min(buflen, uio->uio_resid); 335 cp = buf; 336 if (uio->uio_rw == UIO_WRITE) { 337 error = uiomove(cp, len, uio); 338 if (error) 339 break; 340 } 341 again: 342 s = splbio(); 343 if ((sc->sc_flags & PPIF_UIO) && 344 hpibreq(sc->sc_dev.dv_parent, &sc->sc_hq) == 0) 345 sleep(sc, PRIBIO+1); 346 /* 347 * Check if we timed out during sleep or uiomove 348 */ 349 (void) splsoftclock(); 350 if ((sc->sc_flags & PPIF_UIO) == 0) { 351 #ifdef DEBUG 352 if (ppidebug & PDB_IO) 353 printf("ppirw: uiomove/sleep timo, flags %x\n", 354 sc->sc_flags); 355 #endif 356 if (sc->sc_flags & PPIF_TIMO) { 357 untimeout(ppitimo, sc); 358 sc->sc_flags &= ~PPIF_TIMO; 359 } 360 splx(s); 361 break; 362 } 363 splx(s); 364 /* 365 * Perform the operation 366 */ 367 if (uio->uio_rw == UIO_WRITE) 368 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 369 else 370 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 371 s = splbio(); 372 hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq); 373 #ifdef DEBUG 374 if (ppidebug & PDB_IO) 375 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 376 uio->uio_rw == UIO_READ ? "recv" : "send", 377 ctlr, slave, sc->sc_sec, cp, len, cnt); 378 #endif 379 splx(s); 380 if (uio->uio_rw == UIO_READ) { 381 if (cnt) { 382 error = uiomove(cp, cnt, uio); 383 if (error) 384 break; 385 gotdata++; 386 } 387 /* 388 * Didn't get anything this time, but did in the past. 389 * Consider us done. 390 */ 391 else if (gotdata) 392 break; 393 } 394 s = splsoftclock(); 395 /* 396 * Operation timeout (or non-blocking), quit now. 397 */ 398 if ((sc->sc_flags & PPIF_UIO) == 0) { 399 #ifdef DEBUG 400 if (ppidebug & PDB_IO) 401 printf("ppirw: timeout/done\n"); 402 #endif 403 splx(s); 404 break; 405 } 406 /* 407 * Implement inter-read delay 408 */ 409 if (sc->sc_delay > 0) { 410 sc->sc_flags |= PPIF_DELAY; 411 timeout(ppistart, sc, sc->sc_delay); 412 error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); 413 if (error) { 414 splx(s); 415 break; 416 } 417 } 418 splx(s); 419 /* 420 * Must not call uiomove again til we've used all data 421 * that we already grabbed. 422 */ 423 if (uio->uio_rw == UIO_WRITE && cnt != len) { 424 cp += cnt; 425 len -= cnt; 426 cnt = 0; 427 goto again; 428 } 429 } 430 s = splsoftclock(); 431 if (sc->sc_flags & PPIF_TIMO) { 432 untimeout(ppitimo, sc); 433 sc->sc_flags &= ~PPIF_TIMO; 434 } 435 if (sc->sc_flags & PPIF_DELAY) { 436 untimeout(ppistart, sc); 437 sc->sc_flags &= ~PPIF_DELAY; 438 } 439 splx(s); 440 /* 441 * Adjust for those chars that we uiomove'ed but never wrote 442 */ 443 if (uio->uio_rw == UIO_WRITE && cnt != len) { 444 uio->uio_resid += (len - cnt); 445 #ifdef DEBUG 446 if (ppidebug & PDB_IO) 447 printf("ppirw: short write, adjust by %d\n", 448 len-cnt); 449 #endif 450 } 451 free(buf, M_DEVBUF); 452 #ifdef DEBUG 453 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 454 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 455 #endif 456 return (error); 457 } 458 459 int 460 ppiioctl(dev, cmd, data, flag, p) 461 dev_t dev; 462 u_long cmd; 463 caddr_t data; 464 int flag; 465 struct proc *p; 466 { 467 struct ppi_softc *sc = ppi_cd.cd_devs[UNIT(dev)]; 468 struct ppiparam *pp, *upp; 469 int error = 0; 470 471 switch (cmd) { 472 case PPIIOCGPARAM: 473 pp = &sc->sc_param; 474 upp = (struct ppiparam *)data; 475 upp->burst = pp->burst; 476 upp->timo = ppihztoms(pp->timo); 477 upp->delay = ppihztoms(pp->delay); 478 break; 479 case PPIIOCSPARAM: 480 pp = &sc->sc_param; 481 upp = (struct ppiparam *)data; 482 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 483 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 484 return(EINVAL); 485 pp->burst = upp->burst; 486 pp->timo = ppimstohz(upp->timo); 487 pp->delay = ppimstohz(upp->delay); 488 break; 489 case PPIIOCSSEC: 490 sc->sc_sec = *(int *)data; 491 break; 492 default: 493 return(EINVAL); 494 } 495 return (error); 496 } 497 498 int 499 ppihztoms(h) 500 int h; 501 { 502 extern int hz; 503 int m = h; 504 505 if (m > 0) 506 m = m * 1000 / hz; 507 return(m); 508 } 509 510 int 511 ppimstohz(m) 512 int m; 513 { 514 extern int hz; 515 int h = m; 516 517 if (h > 0) { 518 h = h * hz / 1000; 519 if (h == 0) 520 h = 1000 / hz; 521 } 522 return(h); 523 } 524
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