ppi.c revision 1.12
1 /* $NetBSD: ppi.c,v 1.12 2008/04/28 20:23:48 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 1996-2003 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1990, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)ppi.c 8.1 (Berkeley) 6/16/93 61 */ 62 63 /* 64 * Printer/Plotter GPIB interface 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: ppi.c,v 1.12 2008/04/28 20:23:48 martin Exp $"); 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/callout.h> 73 #include <sys/conf.h> 74 #include <sys/device.h> 75 #include <sys/malloc.h> 76 #include <sys/proc.h> 77 #include <sys/uio.h> 78 79 #include <dev/gpib/gpibvar.h> 80 81 #include <dev/gpib/ppiio.h> 82 83 struct ppi_softc { 84 struct device sc_dev; 85 gpib_chipset_tag_t sc_ic; 86 gpib_handle_t sc_hdl; 87 88 int sc_address; /* GPIB address */ 89 int sc_flags; 90 int sc_sec; 91 struct ppiparam sc_param; 92 #define sc_burst sc_param.burst 93 #define sc_timo sc_param.timo 94 #define sc_delay sc_param.delay 95 struct callout sc_timo_ch; 96 struct callout sc_start_ch; 97 }; 98 99 /* sc_flags values */ 100 #define PPIF_ALIVE 0x01 101 #define PPIF_OPEN 0x02 102 #define PPIF_UIO 0x04 103 #define PPIF_TIMO 0x08 104 #define PPIF_DELAY 0x10 105 106 int ppimatch(struct device *, struct cfdata *, void *); 107 void ppiattach(struct device *, struct device *, void *); 108 109 CFATTACH_DECL(ppi, sizeof(struct ppi_softc), 110 ppimatch, ppiattach, NULL, NULL); 111 112 extern struct cfdriver ppi_cd; 113 114 void ppicallback(void *, int); 115 void ppistart(void *); 116 117 void ppitimo(void *); 118 int ppirw(dev_t, struct uio *); 119 int ppihztoms(int); 120 int ppimstohz(int); 121 122 dev_type_open(ppiopen); 123 dev_type_close(ppiclose); 124 dev_type_read(ppiread); 125 dev_type_write(ppiwrite); 126 dev_type_ioctl(ppiioctl); 127 128 const struct cdevsw ppi_cdevsw = { 129 ppiopen, ppiclose, ppiread, ppiwrite, ppiioctl, 130 nostop, notty, nopoll, nommap, nokqfilter, D_OTHER 131 }; 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 #define DPRINTF(mask, str) if (ppidebug & (mask)) printf str 141 #else 142 #define DPRINTF(mask, str) /* nothing */ 143 #endif 144 145 int 146 ppimatch(parent, match, aux) 147 struct device *parent; 148 struct cfdata *match; 149 void *aux; 150 { 151 152 return (1); 153 } 154 155 void 156 ppiattach(parent, self, aux) 157 struct device *parent, *self; 158 void *aux; 159 { 160 struct ppi_softc *sc = device_private(self); 161 struct gpib_attach_args *ga = aux; 162 163 printf("\n"); 164 165 sc->sc_ic = ga->ga_ic; 166 sc->sc_address = ga->ga_address; 167 168 callout_init(&sc->sc_timo_ch, 0); 169 callout_init(&sc->sc_start_ch, 0); 170 171 if (gpibregister(sc->sc_ic, sc->sc_address, ppicallback, sc, 172 &sc->sc_hdl)) { 173 aprint_error_dev(&sc->sc_dev, "can't register callback\n"); 174 return; 175 } 176 177 sc->sc_flags = PPIF_ALIVE; 178 } 179 180 int 181 ppiopen(dev, flags, fmt, l) 182 dev_t dev; 183 int flags, fmt; 184 struct lwp *l; 185 { 186 int unit = UNIT(dev); 187 struct ppi_softc *sc; 188 189 if (unit >= ppi_cd.cd_ndevs || 190 (sc = ppi_cd.cd_devs[unit]) == NULL || 191 (sc->sc_flags & PPIF_ALIVE) == 0) 192 return (ENXIO); 193 194 DPRINTF(PDB_FOLLOW, ("ppiopen(%x, %x): flags %x\n", 195 dev, flags, sc->sc_flags)); 196 197 if (sc->sc_flags & PPIF_OPEN) 198 return (EBUSY); 199 sc->sc_flags |= PPIF_OPEN; 200 sc->sc_burst = PPI_BURST; 201 sc->sc_timo = ppimstohz(PPI_TIMO); 202 sc->sc_delay = ppimstohz(PPI_DELAY); 203 sc->sc_sec = -1; 204 return (0); 205 } 206 207 int 208 ppiclose(dev, flags, fmt, l) 209 dev_t dev; 210 int flags, fmt; 211 struct lwp *l; 212 { 213 int unit = UNIT(dev); 214 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 215 216 DPRINTF(PDB_FOLLOW, ("ppiclose(%x, %x): flags %x\n", 217 dev, flags, sc->sc_flags)); 218 219 sc->sc_flags &= ~PPIF_OPEN; 220 return (0); 221 } 222 223 void 224 ppicallback(v, action) 225 void *v; 226 int action; 227 { 228 struct ppi_softc *sc = v; 229 230 DPRINTF(PDB_FOLLOW, ("ppicallback: v=%p, action=%d\n", v, action)); 231 232 switch (action) { 233 case GPIBCBF_START: 234 ppistart(sc); 235 case GPIBCBF_INTR: 236 /* no-op */ 237 break; 238 #ifdef DEBUG 239 default: 240 DPRINTF(PDB_FOLLOW, ("ppicallback: unknown action %d\n", 241 action)); 242 break; 243 #endif 244 } 245 } 246 247 void 248 ppistart(v) 249 void *v; 250 { 251 struct ppi_softc *sc = v; 252 253 DPRINTF(PDB_FOLLOW, ("ppistart(%x)\n", device_unit(&sc->sc_dev))); 254 255 sc->sc_flags &= ~PPIF_DELAY; 256 wakeup(sc); 257 } 258 259 void 260 ppitimo(arg) 261 void *arg; 262 { 263 struct ppi_softc *sc = arg; 264 265 DPRINTF(PDB_FOLLOW, ("ppitimo(%x)\n", device_unit(&sc->sc_dev))); 266 267 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 268 wakeup(sc); 269 } 270 271 int 272 ppiread(dev, uio, flags) 273 dev_t dev; 274 struct uio *uio; 275 int flags; 276 { 277 278 DPRINTF(PDB_FOLLOW, ("ppiread(%x, %p)\n", dev, uio)); 279 280 return (ppirw(dev, uio)); 281 } 282 283 int 284 ppiwrite(dev, uio, flags) 285 dev_t dev; 286 struct uio *uio; 287 int flags; 288 { 289 290 DPRINTF(PDB_FOLLOW, ("ppiwrite(%x, %p)\n", dev, uio)); 291 292 return (ppirw(dev, uio)); 293 } 294 295 int 296 ppirw(dev, uio) 297 dev_t dev; 298 struct uio *uio; 299 { 300 int unit = UNIT(dev); 301 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 302 int s1, s2, len, cnt; 303 char *cp; 304 int error = 0, gotdata = 0; 305 int buflen, address; 306 char *buf; 307 308 if (uio->uio_resid == 0) 309 return (0); 310 311 address = sc->sc_address; 312 313 DPRINTF(PDB_FOLLOW|PDB_IO, 314 ("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 315 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 316 sc->sc_burst, sc->sc_timo, uio->uio_resid)); 317 318 buflen = min(sc->sc_burst, uio->uio_resid); 319 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 320 sc->sc_flags |= PPIF_UIO; 321 if (sc->sc_timo > 0) { 322 sc->sc_flags |= PPIF_TIMO; 323 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 324 } 325 len = cnt = 0; 326 while (uio->uio_resid > 0) { 327 len = min(buflen, uio->uio_resid); 328 cp = buf; 329 if (uio->uio_rw == UIO_WRITE) { 330 error = uiomove(cp, len, uio); 331 if (error) 332 break; 333 } 334 again: 335 s1 = splsoftclock(); 336 s2 = splbio(); 337 if (sc->sc_flags & PPIF_UIO) { 338 if (gpibrequest(sc->sc_ic, sc->sc_hdl) == 0) 339 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 340 } 341 /* 342 * Check if we timed out during sleep or uiomove 343 */ 344 splx(s2); 345 if ((sc->sc_flags & PPIF_UIO) == 0) { 346 DPRINTF(PDB_IO, 347 ("ppirw: uiomove/sleep timo, flags %x\n", 348 sc->sc_flags)); 349 if (sc->sc_flags & PPIF_TIMO) { 350 callout_stop(&sc->sc_timo_ch); 351 sc->sc_flags &= ~PPIF_TIMO; 352 } 353 splx(s1); 354 break; 355 } 356 splx(s1); 357 /* 358 * Perform the operation 359 */ 360 if (uio->uio_rw == UIO_WRITE) 361 cnt = gpibsend(sc->sc_ic, address, sc->sc_sec, 362 cp, len); 363 else 364 cnt = gpibrecv(sc->sc_ic, address, sc->sc_sec, 365 cp, len); 366 s1 = splbio(); 367 gpibrelease(sc->sc_ic, sc->sc_hdl); 368 DPRINTF(PDB_IO, ("ppirw: %s(%d, %x, %p, %d) -> %d\n", 369 uio->uio_rw == UIO_READ ? "recv" : "send", 370 address, sc->sc_sec, cp, len, cnt)); 371 splx(s1); 372 if (uio->uio_rw == UIO_READ) { 373 if (cnt) { 374 error = uiomove(cp, cnt, uio); 375 if (error) 376 break; 377 gotdata++; 378 } 379 /* 380 * Didn't get anything this time, but did in the past. 381 * Consider us done. 382 */ 383 else if (gotdata) 384 break; 385 } 386 s1 = splsoftclock(); 387 /* 388 * Operation timeout (or non-blocking), quit now. 389 */ 390 if ((sc->sc_flags & PPIF_UIO) == 0) { 391 DPRINTF(PDB_IO, ("ppirw: timeout/done\n")); 392 splx(s1); 393 break; 394 } 395 /* 396 * Implement inter-read delay 397 */ 398 if (sc->sc_delay > 0) { 399 sc->sc_flags |= PPIF_DELAY; 400 callout_reset(&sc->sc_start_ch, sc->sc_delay, 401 ppistart, sc); 402 error = tsleep(sc, (PCATCH|PZERO) + 1, "gpib", 0); 403 if (error) { 404 splx(s1); 405 break; 406 } 407 } 408 splx(s1); 409 /* 410 * Must not call uiomove again til we've used all data 411 * that we already grabbed. 412 */ 413 if (uio->uio_rw == UIO_WRITE && cnt != len) { 414 cp += cnt; 415 len -= cnt; 416 cnt = 0; 417 goto again; 418 } 419 } 420 s1 = splsoftclock(); 421 if (sc->sc_flags & PPIF_TIMO) { 422 callout_stop(&sc->sc_timo_ch); 423 sc->sc_flags &= ~PPIF_TIMO; 424 } 425 if (sc->sc_flags & PPIF_DELAY) { 426 callout_stop(&sc->sc_start_ch); 427 sc->sc_flags &= ~PPIF_DELAY; 428 } 429 splx(s1); 430 /* 431 * Adjust for those chars that we uiomove'ed but never wrote 432 */ 433 if (uio->uio_rw == UIO_WRITE && cnt != len) { 434 uio->uio_resid += (len - cnt); 435 DPRINTF(PDB_IO, ("ppirw: short write, adjust by %d\n", 436 len - cnt)); 437 } 438 free(buf, M_DEVBUF); 439 DPRINTF(PDB_FOLLOW|PDB_IO, ("ppirw: return %d, resid %d\n", 440 error, uio->uio_resid)); 441 return (error); 442 } 443 444 int 445 ppiioctl(dev, cmd, data, flag, l) 446 dev_t dev; 447 u_long cmd; 448 void *data; 449 int flag; 450 struct lwp *l; 451 { 452 struct ppi_softc *sc = ppi_cd.cd_devs[UNIT(dev)]; 453 struct ppiparam *pp, *upp; 454 int error = 0; 455 456 switch (cmd) { 457 case PPIIOCGPARAM: 458 pp = &sc->sc_param; 459 upp = (struct ppiparam *)data; 460 upp->burst = pp->burst; 461 upp->timo = ppihztoms(pp->timo); 462 upp->delay = ppihztoms(pp->delay); 463 break; 464 case PPIIOCSPARAM: 465 pp = &sc->sc_param; 466 upp = (struct ppiparam *)data; 467 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 468 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 469 return (EINVAL); 470 pp->burst = upp->burst; 471 pp->timo = ppimstohz(upp->timo); 472 pp->delay = ppimstohz(upp->delay); 473 break; 474 case PPIIOCSSEC: 475 sc->sc_sec = *(int *)data; 476 break; 477 default: 478 return (EINVAL); 479 } 480 return (error); 481 } 482 483 int 484 ppihztoms(h) 485 int h; 486 { 487 extern int hz; 488 int m = h; 489 490 if (m > 0) 491 m = m * 1000 / hz; 492 return (m); 493 } 494 495 int 496 ppimstohz(m) 497 int m; 498 { 499 extern int hz; 500 int h = m; 501 502 if (h > 0) { 503 h = h * hz / 1000; 504 if (h == 0) 505 h = 1000 / hz; 506 } 507 return (h); 508 } 509
Indexes created Wed Oct 01 19:09:53 GMT 2025