ppi.c revision 1.27
1 /* $NetBSD: ppi.c,v 1.27 2003/08/07 16:27:34 agc 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. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * 67 * @(#)ppi.c 8.1 (Berkeley) 6/16/93 68 */ 69 70 /* 71 * Printer/Plotter HPIB interface 72 */ 73 74 #include <sys/cdefs.h> 75 __KERNEL_RCSID(0, "$NetBSD: ppi.c,v 1.27 2003/08/07 16:27:34 agc Exp $"); 76 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/callout.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 struct callout sc_timo_ch; 102 struct callout sc_start_ch; 103 }; 104 105 /* sc_flags values */ 106 #define PPIF_ALIVE 0x01 107 #define PPIF_OPEN 0x02 108 #define PPIF_UIO 0x04 109 #define PPIF_TIMO 0x08 110 #define PPIF_DELAY 0x10 111 112 int ppimatch __P((struct device *, struct cfdata *, void *)); 113 void ppiattach __P((struct device *, struct device *, void *)); 114 115 CFATTACH_DECL(ppi, sizeof(struct ppi_softc), 116 ppimatch, ppiattach, NULL, NULL); 117 118 extern struct cfdriver ppi_cd; 119 120 dev_type_open(ppiopen); 121 dev_type_close(ppiclose); 122 dev_type_read(ppiread); 123 dev_type_write(ppiwrite); 124 dev_type_ioctl(ppiioctl); 125 126 const struct cdevsw ppi_cdevsw = { 127 ppiopen, ppiclose, ppiread, ppiwrite, ppiioctl, 128 nostop, notty, nopoll, nommap, nokqfilter, 129 }; 130 131 void ppistart __P((void *)); 132 void ppinoop __P((void *)); 133 134 void ppitimo __P((void *)); 135 int ppirw __P((dev_t, struct uio *)); 136 int ppihztoms __P((int)); 137 int ppimstohz __P((int)); 138 139 #define UNIT(x) minor(x) 140 141 #ifdef DEBUG 142 int ppidebug = 0x80; 143 #define PDB_FOLLOW 0x01 144 #define PDB_IO 0x02 145 #define PDB_NOCHECK 0x80 146 #endif 147 148 int 149 ppimatch(parent, match, aux) 150 struct device *parent; 151 struct cfdata *match; 152 void *aux; 153 { 154 struct hpibbus_attach_args *ha = aux; 155 156 /* 157 * The printer/plotter doesn't return an ID tag. 158 * The check below prevents us from matching a CS80 159 * device by mistake. 160 */ 161 if (ha->ha_id & 0x200) 162 return (0); 163 164 /* 165 * To prevent matching all unused slots on the bus, we 166 * don't allow wildcarded locators. 167 */ 168 if (match->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || 169 match->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) 170 return (0); 171 172 return (1); 173 } 174 175 void 176 ppiattach(parent, self, aux) 177 struct device *parent, *self; 178 void *aux; 179 { 180 struct ppi_softc *sc = (struct ppi_softc *)self; 181 struct hpibbus_attach_args *ha = aux; 182 183 printf("\n"); 184 185 sc->sc_slave = ha->ha_slave; 186 187 callout_init(&sc->sc_timo_ch); 188 callout_init(&sc->sc_start_ch); 189 190 /* Initialize the hpib queue entry. */ 191 sc->sc_hq.hq_softc = sc; 192 sc->sc_hq.hq_slave = sc->sc_slave; 193 sc->sc_hq.hq_start = ppistart; 194 sc->sc_hq.hq_go = ppinoop; 195 sc->sc_hq.hq_intr = ppinoop; 196 197 sc->sc_flags = PPIF_ALIVE; 198 } 199 200 void 201 ppinoop(arg) 202 void *arg; 203 { 204 /* Noop! */ 205 } 206 207 int 208 ppiopen(dev, flags, fmt, p) 209 dev_t dev; 210 int flags, fmt; 211 struct proc *p; 212 { 213 int unit = UNIT(dev); 214 struct ppi_softc *sc; 215 216 if (unit >= ppi_cd.cd_ndevs || 217 (sc = ppi_cd.cd_devs[unit]) == NULL || 218 (sc->sc_flags & PPIF_ALIVE) == 0) 219 return (ENXIO); 220 221 #ifdef DEBUG 222 if (ppidebug & PDB_FOLLOW) 223 printf("ppiopen(%x, %x): flags %x\n", 224 dev, flags, sc->sc_flags); 225 #endif 226 if (sc->sc_flags & PPIF_OPEN) 227 return (EBUSY); 228 sc->sc_flags |= PPIF_OPEN; 229 sc->sc_burst = PPI_BURST; 230 sc->sc_timo = ppimstohz(PPI_TIMO); 231 sc->sc_delay = ppimstohz(PPI_DELAY); 232 sc->sc_sec = -1; 233 return(0); 234 } 235 236 int 237 ppiclose(dev, flags, fmt, p) 238 dev_t dev; 239 int flags, fmt; 240 struct proc *p; 241 { 242 int unit = UNIT(dev); 243 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 244 245 #ifdef DEBUG 246 if (ppidebug & PDB_FOLLOW) 247 printf("ppiclose(%x, %x): flags %x\n", 248 dev, flags, sc->sc_flags); 249 #endif 250 sc->sc_flags &= ~PPIF_OPEN; 251 return(0); 252 } 253 254 void 255 ppistart(arg) 256 void *arg; 257 { 258 struct ppi_softc *sc = arg; 259 260 #ifdef DEBUG 261 if (ppidebug & PDB_FOLLOW) 262 printf("ppistart(%x)\n", sc->sc_dev.dv_unit); 263 #endif 264 sc->sc_flags &= ~PPIF_DELAY; 265 wakeup(sc); 266 } 267 268 void 269 ppitimo(arg) 270 void *arg; 271 { 272 struct ppi_softc *sc = arg; 273 274 #ifdef DEBUG 275 if (ppidebug & PDB_FOLLOW) 276 printf("ppitimo(%x)\n", sc->sc_dev.dv_unit); 277 #endif 278 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 279 wakeup(sc); 280 } 281 282 int 283 ppiread(dev, uio, flags) 284 dev_t dev; 285 struct uio *uio; 286 int flags; 287 { 288 289 #ifdef DEBUG 290 if (ppidebug & PDB_FOLLOW) 291 printf("ppiread(%x, %p)\n", dev, uio); 292 #endif 293 return (ppirw(dev, uio)); 294 } 295 296 int 297 ppiwrite(dev, uio, flags) 298 dev_t dev; 299 struct uio *uio; 300 int flags; 301 { 302 303 #ifdef DEBUG 304 if (ppidebug & PDB_FOLLOW) 305 printf("ppiwrite(%x, %p)\n", dev, uio); 306 #endif 307 return (ppirw(dev, uio)); 308 } 309 310 int 311 ppirw(dev, uio) 312 dev_t dev; 313 struct uio *uio; 314 { 315 int unit = UNIT(dev); 316 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 317 int s, len, cnt; 318 char *cp; 319 int error = 0, gotdata = 0; 320 int buflen, ctlr, slave; 321 char *buf; 322 323 if (uio->uio_resid == 0) 324 return(0); 325 326 ctlr = sc->sc_dev.dv_parent->dv_unit; 327 slave = sc->sc_slave; 328 329 #ifdef DEBUG 330 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 331 printf("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 332 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 333 sc->sc_burst, sc->sc_timo, uio->uio_resid); 334 #endif 335 buflen = min(sc->sc_burst, uio->uio_resid); 336 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 337 sc->sc_flags |= PPIF_UIO; 338 if (sc->sc_timo > 0) { 339 sc->sc_flags |= PPIF_TIMO; 340 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 341 } 342 len = cnt = 0; 343 while (uio->uio_resid > 0) { 344 len = min(buflen, uio->uio_resid); 345 cp = buf; 346 if (uio->uio_rw == UIO_WRITE) { 347 error = uiomove(cp, len, uio); 348 if (error) 349 break; 350 } 351 again: 352 s = splbio(); 353 if ((sc->sc_flags & PPIF_UIO) && 354 hpibreq(sc->sc_dev.dv_parent, &sc->sc_hq) == 0) 355 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 356 /* 357 * Check if we timed out during sleep or uiomove 358 */ 359 (void) spllowersoftclock(); 360 if ((sc->sc_flags & PPIF_UIO) == 0) { 361 #ifdef DEBUG 362 if (ppidebug & PDB_IO) 363 printf("ppirw: uiomove/sleep timo, flags %x\n", 364 sc->sc_flags); 365 #endif 366 if (sc->sc_flags & PPIF_TIMO) { 367 callout_stop(&sc->sc_timo_ch); 368 sc->sc_flags &= ~PPIF_TIMO; 369 } 370 splx(s); 371 break; 372 } 373 splx(s); 374 /* 375 * Perform the operation 376 */ 377 if (uio->uio_rw == UIO_WRITE) 378 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 379 else 380 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 381 s = splbio(); 382 hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq); 383 #ifdef DEBUG 384 if (ppidebug & PDB_IO) 385 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 386 uio->uio_rw == UIO_READ ? "recv" : "send", 387 ctlr, slave, sc->sc_sec, cp, len, cnt); 388 #endif 389 splx(s); 390 if (uio->uio_rw == UIO_READ) { 391 if (cnt) { 392 error = uiomove(cp, cnt, uio); 393 if (error) 394 break; 395 gotdata++; 396 } 397 /* 398 * Didn't get anything this time, but did in the past. 399 * Consider us done. 400 */ 401 else if (gotdata) 402 break; 403 } 404 s = splsoftclock(); 405 /* 406 * Operation timeout (or non-blocking), quit now. 407 */ 408 if ((sc->sc_flags & PPIF_UIO) == 0) { 409 #ifdef DEBUG 410 if (ppidebug & PDB_IO) 411 printf("ppirw: timeout/done\n"); 412 #endif 413 splx(s); 414 break; 415 } 416 /* 417 * Implement inter-read delay 418 */ 419 if (sc->sc_delay > 0) { 420 sc->sc_flags |= PPIF_DELAY; 421 callout_reset(&sc->sc_start_ch, sc->sc_delay, 422 ppistart, sc); 423 error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); 424 if (error) { 425 splx(s); 426 break; 427 } 428 } 429 splx(s); 430 /* 431 * Must not call uiomove again til we've used all data 432 * that we already grabbed. 433 */ 434 if (uio->uio_rw == UIO_WRITE && cnt != len) { 435 cp += cnt; 436 len -= cnt; 437 cnt = 0; 438 goto again; 439 } 440 } 441 s = splsoftclock(); 442 if (sc->sc_flags & PPIF_TIMO) { 443 callout_stop(&sc->sc_timo_ch); 444 sc->sc_flags &= ~PPIF_TIMO; 445 } 446 if (sc->sc_flags & PPIF_DELAY) { 447 callout_stop(&sc->sc_start_ch); 448 sc->sc_flags &= ~PPIF_DELAY; 449 } 450 splx(s); 451 /* 452 * Adjust for those chars that we uiomove'ed but never wrote 453 */ 454 if (uio->uio_rw == UIO_WRITE && cnt != len) { 455 uio->uio_resid += (len - cnt); 456 #ifdef DEBUG 457 if (ppidebug & PDB_IO) 458 printf("ppirw: short write, adjust by %d\n", 459 len-cnt); 460 #endif 461 } 462 free(buf, M_DEVBUF); 463 #ifdef DEBUG 464 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 465 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 466 #endif 467 return (error); 468 } 469 470 int 471 ppiioctl(dev, cmd, data, flag, p) 472 dev_t dev; 473 u_long cmd; 474 caddr_t data; 475 int flag; 476 struct proc *p; 477 { 478 struct ppi_softc *sc = ppi_cd.cd_devs[UNIT(dev)]; 479 struct ppiparam *pp, *upp; 480 int error = 0; 481 482 switch (cmd) { 483 case PPIIOCGPARAM: 484 pp = &sc->sc_param; 485 upp = (struct ppiparam *)data; 486 upp->burst = pp->burst; 487 upp->timo = ppihztoms(pp->timo); 488 upp->delay = ppihztoms(pp->delay); 489 break; 490 case PPIIOCSPARAM: 491 pp = &sc->sc_param; 492 upp = (struct ppiparam *)data; 493 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 494 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 495 return(EINVAL); 496 pp->burst = upp->burst; 497 pp->timo = ppimstohz(upp->timo); 498 pp->delay = ppimstohz(upp->delay); 499 break; 500 case PPIIOCSSEC: 501 sc->sc_sec = *(int *)data; 502 break; 503 default: 504 return(EINVAL); 505 } 506 return (error); 507 } 508 509 int 510 ppihztoms(h) 511 int h; 512 { 513 extern int hz; 514 int m = h; 515 516 if (m > 0) 517 m = m * 1000 / hz; 518 return(m); 519 } 520 521 int 522 ppimstohz(m) 523 int m; 524 { 525 extern int hz; 526 int h = m; 527 528 if (h > 0) { 529 h = h * hz / 1000; 530 if (h == 0) 531 h = 1000 / hz; 532 } 533 return(h); 534 } 535
Indexes created Wed Oct 01 19:09:53 GMT 2025