ppi.c revision 1.21
1 /* $NetBSD: ppi.c,v 1.21 2002/09/06 13:18:43 gehenna 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 1.21 2002/09/06 13:18:43 gehenna 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 struct cfattach ppi_ca = { 120 sizeof(struct ppi_softc), ppimatch, ppiattach 121 }; 122 123 extern struct cfdriver ppi_cd; 124 125 dev_type_open(ppiopen); 126 dev_type_close(ppiclose); 127 dev_type_read(ppiread); 128 dev_type_write(ppiwrite); 129 dev_type_ioctl(ppiioctl); 130 131 const struct cdevsw ppi_cdevsw = { 132 ppiopen, ppiclose, ppiread, ppiwrite, ppiioctl, 133 nostop, notty, nopoll, nommap, 134 }; 135 136 void ppistart __P((void *)); 137 void ppinoop __P((void *)); 138 139 void ppitimo __P((void *)); 140 int ppirw __P((dev_t, struct uio *)); 141 int ppihztoms __P((int)); 142 int ppimstohz __P((int)); 143 144 #define UNIT(x) minor(x) 145 146 #ifdef DEBUG 147 int ppidebug = 0x80; 148 #define PDB_FOLLOW 0x01 149 #define PDB_IO 0x02 150 #define PDB_NOCHECK 0x80 151 #endif 152 153 int 154 ppimatch(parent, match, aux) 155 struct device *parent; 156 struct cfdata *match; 157 void *aux; 158 { 159 struct hpibbus_attach_args *ha = aux; 160 161 /* 162 * The printer/plotter doesn't return an ID tag. 163 * The check below prevents us from matching a CS80 164 * device by mistake. 165 */ 166 if (ha->ha_id & 0x200) 167 return (0); 168 169 /* 170 * To prevent matching all unused slots on the bus, we 171 * don't allow wildcarded locators. 172 */ 173 if (match->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || 174 match->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) 175 return (0); 176 177 return (1); 178 } 179 180 void 181 ppiattach(parent, self, aux) 182 struct device *parent, *self; 183 void *aux; 184 { 185 struct ppi_softc *sc = (struct ppi_softc *)self; 186 struct hpibbus_attach_args *ha = aux; 187 188 printf("\n"); 189 190 sc->sc_slave = ha->ha_slave; 191 192 callout_init(&sc->sc_timo_ch); 193 callout_init(&sc->sc_start_ch); 194 195 /* Initialize the hpib queue entry. */ 196 sc->sc_hq.hq_softc = sc; 197 sc->sc_hq.hq_slave = sc->sc_slave; 198 sc->sc_hq.hq_start = ppistart; 199 sc->sc_hq.hq_go = ppinoop; 200 sc->sc_hq.hq_intr = ppinoop; 201 202 sc->sc_flags = PPIF_ALIVE; 203 } 204 205 void 206 ppinoop(arg) 207 void *arg; 208 { 209 /* Noop! */ 210 } 211 212 int 213 ppiopen(dev, flags, fmt, p) 214 dev_t dev; 215 int flags, fmt; 216 struct proc *p; 217 { 218 int unit = UNIT(dev); 219 struct ppi_softc *sc; 220 221 if (unit >= ppi_cd.cd_ndevs || 222 (sc = ppi_cd.cd_devs[unit]) == NULL || 223 (sc->sc_flags & PPIF_ALIVE) == 0) 224 return (ENXIO); 225 226 #ifdef DEBUG 227 if (ppidebug & PDB_FOLLOW) 228 printf("ppiopen(%x, %x): flags %x\n", 229 dev, flags, sc->sc_flags); 230 #endif 231 if (sc->sc_flags & PPIF_OPEN) 232 return (EBUSY); 233 sc->sc_flags |= PPIF_OPEN; 234 sc->sc_burst = PPI_BURST; 235 sc->sc_timo = ppimstohz(PPI_TIMO); 236 sc->sc_delay = ppimstohz(PPI_DELAY); 237 sc->sc_sec = -1; 238 return(0); 239 } 240 241 int 242 ppiclose(dev, flags, fmt, p) 243 dev_t dev; 244 int flags, fmt; 245 struct proc *p; 246 { 247 int unit = UNIT(dev); 248 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 249 250 #ifdef DEBUG 251 if (ppidebug & PDB_FOLLOW) 252 printf("ppiclose(%x, %x): flags %x\n", 253 dev, flags, sc->sc_flags); 254 #endif 255 sc->sc_flags &= ~PPIF_OPEN; 256 return(0); 257 } 258 259 void 260 ppistart(arg) 261 void *arg; 262 { 263 struct ppi_softc *sc = arg; 264 265 #ifdef DEBUG 266 if (ppidebug & PDB_FOLLOW) 267 printf("ppistart(%x)\n", sc->sc_dev.dv_unit); 268 #endif 269 sc->sc_flags &= ~PPIF_DELAY; 270 wakeup(sc); 271 } 272 273 void 274 ppitimo(arg) 275 void *arg; 276 { 277 struct ppi_softc *sc = arg; 278 279 #ifdef DEBUG 280 if (ppidebug & PDB_FOLLOW) 281 printf("ppitimo(%x)\n", sc->sc_dev.dv_unit); 282 #endif 283 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 284 wakeup(sc); 285 } 286 287 int 288 ppiread(dev, uio, flags) 289 dev_t dev; 290 struct uio *uio; 291 int flags; 292 { 293 294 #ifdef DEBUG 295 if (ppidebug & PDB_FOLLOW) 296 printf("ppiread(%x, %p)\n", dev, uio); 297 #endif 298 return (ppirw(dev, uio)); 299 } 300 301 int 302 ppiwrite(dev, uio, flags) 303 dev_t dev; 304 struct uio *uio; 305 int flags; 306 { 307 308 #ifdef DEBUG 309 if (ppidebug & PDB_FOLLOW) 310 printf("ppiwrite(%x, %p)\n", dev, uio); 311 #endif 312 return (ppirw(dev, uio)); 313 } 314 315 int 316 ppirw(dev, uio) 317 dev_t dev; 318 struct uio *uio; 319 { 320 int unit = UNIT(dev); 321 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 322 int s, len, cnt; 323 char *cp; 324 int error = 0, gotdata = 0; 325 int buflen, ctlr, slave; 326 char *buf; 327 328 if (uio->uio_resid == 0) 329 return(0); 330 331 ctlr = sc->sc_dev.dv_parent->dv_unit; 332 slave = sc->sc_slave; 333 334 #ifdef DEBUG 335 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 336 printf("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 337 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 338 sc->sc_burst, sc->sc_timo, uio->uio_resid); 339 #endif 340 buflen = min(sc->sc_burst, uio->uio_resid); 341 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 342 sc->sc_flags |= PPIF_UIO; 343 if (sc->sc_timo > 0) { 344 sc->sc_flags |= PPIF_TIMO; 345 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 346 } 347 len = cnt = 0; 348 while (uio->uio_resid > 0) { 349 len = min(buflen, uio->uio_resid); 350 cp = buf; 351 if (uio->uio_rw == UIO_WRITE) { 352 error = uiomove(cp, len, uio); 353 if (error) 354 break; 355 } 356 again: 357 s = splbio(); 358 if ((sc->sc_flags & PPIF_UIO) && 359 hpibreq(sc->sc_dev.dv_parent, &sc->sc_hq) == 0) 360 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 361 /* 362 * Check if we timed out during sleep or uiomove 363 */ 364 (void) spllowersoftclock(); 365 if ((sc->sc_flags & PPIF_UIO) == 0) { 366 #ifdef DEBUG 367 if (ppidebug & PDB_IO) 368 printf("ppirw: uiomove/sleep timo, flags %x\n", 369 sc->sc_flags); 370 #endif 371 if (sc->sc_flags & PPIF_TIMO) { 372 callout_stop(&sc->sc_timo_ch); 373 sc->sc_flags &= ~PPIF_TIMO; 374 } 375 splx(s); 376 break; 377 } 378 splx(s); 379 /* 380 * Perform the operation 381 */ 382 if (uio->uio_rw == UIO_WRITE) 383 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 384 else 385 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 386 s = splbio(); 387 hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq); 388 #ifdef DEBUG 389 if (ppidebug & PDB_IO) 390 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 391 uio->uio_rw == UIO_READ ? "recv" : "send", 392 ctlr, slave, sc->sc_sec, cp, len, cnt); 393 #endif 394 splx(s); 395 if (uio->uio_rw == UIO_READ) { 396 if (cnt) { 397 error = uiomove(cp, cnt, uio); 398 if (error) 399 break; 400 gotdata++; 401 } 402 /* 403 * Didn't get anything this time, but did in the past. 404 * Consider us done. 405 */ 406 else if (gotdata) 407 break; 408 } 409 s = splsoftclock(); 410 /* 411 * Operation timeout (or non-blocking), quit now. 412 */ 413 if ((sc->sc_flags & PPIF_UIO) == 0) { 414 #ifdef DEBUG 415 if (ppidebug & PDB_IO) 416 printf("ppirw: timeout/done\n"); 417 #endif 418 splx(s); 419 break; 420 } 421 /* 422 * Implement inter-read delay 423 */ 424 if (sc->sc_delay > 0) { 425 sc->sc_flags |= PPIF_DELAY; 426 callout_reset(&sc->sc_start_ch, sc->sc_delay, 427 ppistart, sc); 428 error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); 429 if (error) { 430 splx(s); 431 break; 432 } 433 } 434 splx(s); 435 /* 436 * Must not call uiomove again til we've used all data 437 * that we already grabbed. 438 */ 439 if (uio->uio_rw == UIO_WRITE && cnt != len) { 440 cp += cnt; 441 len -= cnt; 442 cnt = 0; 443 goto again; 444 } 445 } 446 s = splsoftclock(); 447 if (sc->sc_flags & PPIF_TIMO) { 448 callout_stop(&sc->sc_timo_ch); 449 sc->sc_flags &= ~PPIF_TIMO; 450 } 451 if (sc->sc_flags & PPIF_DELAY) { 452 callout_stop(&sc->sc_start_ch); 453 sc->sc_flags &= ~PPIF_DELAY; 454 } 455 splx(s); 456 /* 457 * Adjust for those chars that we uiomove'ed but never wrote 458 */ 459 if (uio->uio_rw == UIO_WRITE && cnt != len) { 460 uio->uio_resid += (len - cnt); 461 #ifdef DEBUG 462 if (ppidebug & PDB_IO) 463 printf("ppirw: short write, adjust by %d\n", 464 len-cnt); 465 #endif 466 } 467 free(buf, M_DEVBUF); 468 #ifdef DEBUG 469 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 470 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 471 #endif 472 return (error); 473 } 474 475 int 476 ppiioctl(dev, cmd, data, flag, p) 477 dev_t dev; 478 u_long cmd; 479 caddr_t data; 480 int flag; 481 struct proc *p; 482 { 483 struct ppi_softc *sc = ppi_cd.cd_devs[UNIT(dev)]; 484 struct ppiparam *pp, *upp; 485 int error = 0; 486 487 switch (cmd) { 488 case PPIIOCGPARAM: 489 pp = &sc->sc_param; 490 upp = (struct ppiparam *)data; 491 upp->burst = pp->burst; 492 upp->timo = ppihztoms(pp->timo); 493 upp->delay = ppihztoms(pp->delay); 494 break; 495 case PPIIOCSPARAM: 496 pp = &sc->sc_param; 497 upp = (struct ppiparam *)data; 498 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 499 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 500 return(EINVAL); 501 pp->burst = upp->burst; 502 pp->timo = ppimstohz(upp->timo); 503 pp->delay = ppimstohz(upp->delay); 504 break; 505 case PPIIOCSSEC: 506 sc->sc_sec = *(int *)data; 507 break; 508 default: 509 return(EINVAL); 510 } 511 return (error); 512 } 513 514 int 515 ppihztoms(h) 516 int h; 517 { 518 extern int hz; 519 int m = h; 520 521 if (m > 0) 522 m = m * 1000 / hz; 523 return(m); 524 } 525 526 int 527 ppimstohz(m) 528 int m; 529 { 530 extern int hz; 531 int h = m; 532 533 if (h > 0) { 534 h = h * hz / 1000; 535 if (h == 0) 536 h = 1000 / hz; 537 } 538 return(h); 539 } 540
Indexes created Wed Oct 01 18:09:54 GMT 2025