ppi.c revision 1.14
1 /* $NetBSD: ppi.c,v 1.14 2009/03/14 15:36:17 dsl 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 1.14 2009/03/14 15:36:17 dsl 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(struct device *parent, struct cfdata *match, void *aux) 147 { 148 149 return (1); 150 } 151 152 void 153 ppiattach(parent, self, aux) 154 struct device *parent, *self; 155 void *aux; 156 { 157 struct ppi_softc *sc = device_private(self); 158 struct gpib_attach_args *ga = aux; 159 160 printf("\n"); 161 162 sc->sc_ic = ga->ga_ic; 163 sc->sc_address = ga->ga_address; 164 165 callout_init(&sc->sc_timo_ch, 0); 166 callout_init(&sc->sc_start_ch, 0); 167 168 if (gpibregister(sc->sc_ic, sc->sc_address, ppicallback, sc, 169 &sc->sc_hdl)) { 170 aprint_error_dev(&sc->sc_dev, "can't register callback\n"); 171 return; 172 } 173 174 sc->sc_flags = PPIF_ALIVE; 175 } 176 177 int 178 ppiopen(dev_t dev, int flags, int fmt, struct lwp *l) 179 { 180 struct ppi_softc *sc; 181 182 sc = device_lookup_private(&ppi_cd, UNIT(dev)); 183 if (sc == NULL) 184 return (ENXIO); 185 186 if (sc->sc_flags & PPIF_ALIVE) == 0) 187 return (ENXIO); 188 189 DPRINTF(PDB_FOLLOW, ("ppiopen(%x, %x): flags %x\n", 190 dev, flags, sc->sc_flags)); 191 192 if (sc->sc_flags & PPIF_OPEN) 193 return (EBUSY); 194 sc->sc_flags |= PPIF_OPEN; 195 sc->sc_burst = PPI_BURST; 196 sc->sc_timo = ppimstohz(PPI_TIMO); 197 sc->sc_delay = ppimstohz(PPI_DELAY); 198 sc->sc_sec = -1; 199 return (0); 200 } 201 202 int 203 ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) 204 { 205 struct ppi_softc *sc; 206 207 sc = device_lookup_private(&ppi_cd, UNIT(dev)); 208 209 DPRINTF(PDB_FOLLOW, ("ppiclose(%x, %x): flags %x\n", 210 dev, flags, sc->sc_flags)); 211 212 sc->sc_flags &= ~PPIF_OPEN; 213 return (0); 214 } 215 216 void 217 ppicallback(void *v, int action) 218 { 219 struct ppi_softc *sc = v; 220 221 DPRINTF(PDB_FOLLOW, ("ppicallback: v=%p, action=%d\n", v, action)); 222 223 switch (action) { 224 case GPIBCBF_START: 225 ppistart(sc); 226 case GPIBCBF_INTR: 227 /* no-op */ 228 break; 229 #ifdef DEBUG 230 default: 231 DPRINTF(PDB_FOLLOW, ("ppicallback: unknown action %d\n", 232 action)); 233 break; 234 #endif 235 } 236 } 237 238 void 239 ppistart(void *v) 240 { 241 struct ppi_softc *sc = v; 242 243 DPRINTF(PDB_FOLLOW, ("ppistart(%x)\n", device_unit(&sc->sc_dev))); 244 245 sc->sc_flags &= ~PPIF_DELAY; 246 wakeup(sc); 247 } 248 249 void 250 ppitimo(void *arg) 251 { 252 struct ppi_softc *sc = arg; 253 254 DPRINTF(PDB_FOLLOW, ("ppitimo(%x)\n", device_unit(&sc->sc_dev))); 255 256 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 257 wakeup(sc); 258 } 259 260 int 261 ppiread(dev_t dev, struct uio *uio, int flags) 262 { 263 264 DPRINTF(PDB_FOLLOW, ("ppiread(%x, %p)\n", dev, uio)); 265 266 return (ppirw(dev, uio)); 267 } 268 269 int 270 ppiwrite(dev_t dev, struct uio *uio, int flags) 271 { 272 273 DPRINTF(PDB_FOLLOW, ("ppiwrite(%x, %p)\n", dev, uio)); 274 275 return (ppirw(dev, uio)); 276 } 277 278 int 279 ppirw(dev_t dev, struct uio *uio) 280 { 281 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 282 int s1, s2, len, cnt; 283 char *cp; 284 int error = 0, gotdata = 0; 285 int buflen, address; 286 char *buf; 287 288 if (uio->uio_resid == 0) 289 return (0); 290 291 address = sc->sc_address; 292 293 DPRINTF(PDB_FOLLOW|PDB_IO, 294 ("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 295 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 296 sc->sc_burst, sc->sc_timo, uio->uio_resid)); 297 298 buflen = min(sc->sc_burst, uio->uio_resid); 299 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 300 sc->sc_flags |= PPIF_UIO; 301 if (sc->sc_timo > 0) { 302 sc->sc_flags |= PPIF_TIMO; 303 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 304 } 305 len = cnt = 0; 306 while (uio->uio_resid > 0) { 307 len = min(buflen, uio->uio_resid); 308 cp = buf; 309 if (uio->uio_rw == UIO_WRITE) { 310 error = uiomove(cp, len, uio); 311 if (error) 312 break; 313 } 314 again: 315 s1 = splsoftclock(); 316 s2 = splbio(); 317 if (sc->sc_flags & PPIF_UIO) { 318 if (gpibrequest(sc->sc_ic, sc->sc_hdl) == 0) 319 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 320 } 321 /* 322 * Check if we timed out during sleep or uiomove 323 */ 324 splx(s2); 325 if ((sc->sc_flags & PPIF_UIO) == 0) { 326 DPRINTF(PDB_IO, 327 ("ppirw: uiomove/sleep timo, flags %x\n", 328 sc->sc_flags)); 329 if (sc->sc_flags & PPIF_TIMO) { 330 callout_stop(&sc->sc_timo_ch); 331 sc->sc_flags &= ~PPIF_TIMO; 332 } 333 splx(s1); 334 break; 335 } 336 splx(s1); 337 /* 338 * Perform the operation 339 */ 340 if (uio->uio_rw == UIO_WRITE) 341 cnt = gpibsend(sc->sc_ic, address, sc->sc_sec, 342 cp, len); 343 else 344 cnt = gpibrecv(sc->sc_ic, address, sc->sc_sec, 345 cp, len); 346 s1 = splbio(); 347 gpibrelease(sc->sc_ic, sc->sc_hdl); 348 DPRINTF(PDB_IO, ("ppirw: %s(%d, %x, %p, %d) -> %d\n", 349 uio->uio_rw == UIO_READ ? "recv" : "send", 350 address, sc->sc_sec, cp, len, cnt)); 351 splx(s1); 352 if (uio->uio_rw == UIO_READ) { 353 if (cnt) { 354 error = uiomove(cp, cnt, uio); 355 if (error) 356 break; 357 gotdata++; 358 } 359 /* 360 * Didn't get anything this time, but did in the past. 361 * Consider us done. 362 */ 363 else if (gotdata) 364 break; 365 } 366 s1 = splsoftclock(); 367 /* 368 * Operation timeout (or non-blocking), quit now. 369 */ 370 if ((sc->sc_flags & PPIF_UIO) == 0) { 371 DPRINTF(PDB_IO, ("ppirw: timeout/done\n")); 372 splx(s1); 373 break; 374 } 375 /* 376 * Implement inter-read delay 377 */ 378 if (sc->sc_delay > 0) { 379 sc->sc_flags |= PPIF_DELAY; 380 callout_reset(&sc->sc_start_ch, sc->sc_delay, 381 ppistart, sc); 382 error = tsleep(sc, (PCATCH|PZERO) + 1, "gpib", 0); 383 if (error) { 384 splx(s1); 385 break; 386 } 387 } 388 splx(s1); 389 /* 390 * Must not call uiomove again til we've used all data 391 * that we already grabbed. 392 */ 393 if (uio->uio_rw == UIO_WRITE && cnt != len) { 394 cp += cnt; 395 len -= cnt; 396 cnt = 0; 397 goto again; 398 } 399 } 400 s1 = splsoftclock(); 401 if (sc->sc_flags & PPIF_TIMO) { 402 callout_stop(&sc->sc_timo_ch); 403 sc->sc_flags &= ~PPIF_TIMO; 404 } 405 if (sc->sc_flags & PPIF_DELAY) { 406 callout_stop(&sc->sc_start_ch); 407 sc->sc_flags &= ~PPIF_DELAY; 408 } 409 splx(s1); 410 /* 411 * Adjust for those chars that we uiomove'ed but never wrote 412 */ 413 if (uio->uio_rw == UIO_WRITE && cnt != len) { 414 uio->uio_resid += (len - cnt); 415 DPRINTF(PDB_IO, ("ppirw: short write, adjust by %d\n", 416 len - cnt)); 417 } 418 free(buf, M_DEVBUF); 419 DPRINTF(PDB_FOLLOW|PDB_IO, ("ppirw: return %d, resid %d\n", 420 error, uio->uio_resid)); 421 return (error); 422 } 423 424 int 425 ppiioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 426 { 427 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 428 struct ppiparam *pp, *upp; 429 int error = 0; 430 431 switch (cmd) { 432 case PPIIOCGPARAM: 433 pp = &sc->sc_param; 434 upp = (struct ppiparam *)data; 435 upp->burst = pp->burst; 436 upp->timo = ppihztoms(pp->timo); 437 upp->delay = ppihztoms(pp->delay); 438 break; 439 case PPIIOCSPARAM: 440 pp = &sc->sc_param; 441 upp = (struct ppiparam *)data; 442 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 443 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 444 return (EINVAL); 445 pp->burst = upp->burst; 446 pp->timo = ppimstohz(upp->timo); 447 pp->delay = ppimstohz(upp->delay); 448 break; 449 case PPIIOCSSEC: 450 sc->sc_sec = *(int *)data; 451 break; 452 default: 453 return (EINVAL); 454 } 455 return (error); 456 } 457 458 int 459 ppihztoms(int h) 460 { 461 extern int hz; 462 int m = h; 463 464 if (m > 0) 465 m = m * 1000 / hz; 466 return (m); 467 } 468 469 int 470 ppimstohz(int m) 471 { 472 extern int hz; 473 int h = m; 474 475 if (h > 0) { 476 h = h * hz / 1000; 477 if (h == 0) 478 h = 1000 / hz; 479 } 480 return (h); 481 } 482
Indexes created Wed Oct 01 07:09:59 GMT 2025