ppi.c revision 1.12.2.1
1 /* $NetBSD: ppi.c,v 1.12.2.1 2008/06/23 04:31:01 wrstuden 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 1.12.2.1 2008/06/23 04:31:01 wrstuden 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_t dev, int flags, int fmt, struct lwp *l) 182 { 183 struct ppi_softc *sc; 184 185 sc = device_lookup_private(&ppi_cd, UNIT(dev)); 186 if (sc == NULL) 187 return (ENXIO); 188 189 if (sc->sc_flags & PPIF_ALIVE) == 0) 190 return (ENXIO); 191 192 DPRINTF(PDB_FOLLOW, ("ppiopen(%x, %x): flags %x\n", 193 dev, flags, sc->sc_flags)); 194 195 if (sc->sc_flags & PPIF_OPEN) 196 return (EBUSY); 197 sc->sc_flags |= PPIF_OPEN; 198 sc->sc_burst = PPI_BURST; 199 sc->sc_timo = ppimstohz(PPI_TIMO); 200 sc->sc_delay = ppimstohz(PPI_DELAY); 201 sc->sc_sec = -1; 202 return (0); 203 } 204 205 int 206 ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) 207 { 208 struct ppi_softc *sc; 209 210 sc = device_lookup_private(&ppi_cd, UNIT(dev)); 211 212 DPRINTF(PDB_FOLLOW, ("ppiclose(%x, %x): flags %x\n", 213 dev, flags, sc->sc_flags)); 214 215 sc->sc_flags &= ~PPIF_OPEN; 216 return (0); 217 } 218 219 void 220 ppicallback(v, action) 221 void *v; 222 int action; 223 { 224 struct ppi_softc *sc = v; 225 226 DPRINTF(PDB_FOLLOW, ("ppicallback: v=%p, action=%d\n", v, action)); 227 228 switch (action) { 229 case GPIBCBF_START: 230 ppistart(sc); 231 case GPIBCBF_INTR: 232 /* no-op */ 233 break; 234 #ifdef DEBUG 235 default: 236 DPRINTF(PDB_FOLLOW, ("ppicallback: unknown action %d\n", 237 action)); 238 break; 239 #endif 240 } 241 } 242 243 void 244 ppistart(void *v) 245 { 246 struct ppi_softc *sc = v; 247 248 DPRINTF(PDB_FOLLOW, ("ppistart(%x)\n", device_unit(&sc->sc_dev))); 249 250 sc->sc_flags &= ~PPIF_DELAY; 251 wakeup(sc); 252 } 253 254 void 255 ppitimo(void *arg) 256 { 257 struct ppi_softc *sc = arg; 258 259 DPRINTF(PDB_FOLLOW, ("ppitimo(%x)\n", device_unit(&sc->sc_dev))); 260 261 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 262 wakeup(sc); 263 } 264 265 int 266 ppiread(dev_t dev, struct uio *uio, int flags) 267 { 268 269 DPRINTF(PDB_FOLLOW, ("ppiread(%x, %p)\n", dev, uio)); 270 271 return (ppirw(dev, uio)); 272 } 273 274 int 275 ppiwrite(dev_t dev, struct uio *uio, int flags) 276 { 277 278 DPRINTF(PDB_FOLLOW, ("ppiwrite(%x, %p)\n", dev, uio)); 279 280 return (ppirw(dev, uio)); 281 } 282 283 int 284 ppirw(dev_t dev, struct uio *uio) 285 { 286 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 287 int s1, s2, len, cnt; 288 char *cp; 289 int error = 0, gotdata = 0; 290 int buflen, address; 291 char *buf; 292 293 if (uio->uio_resid == 0) 294 return (0); 295 296 address = sc->sc_address; 297 298 DPRINTF(PDB_FOLLOW|PDB_IO, 299 ("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 300 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 301 sc->sc_burst, sc->sc_timo, uio->uio_resid)); 302 303 buflen = min(sc->sc_burst, uio->uio_resid); 304 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 305 sc->sc_flags |= PPIF_UIO; 306 if (sc->sc_timo > 0) { 307 sc->sc_flags |= PPIF_TIMO; 308 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 309 } 310 len = cnt = 0; 311 while (uio->uio_resid > 0) { 312 len = min(buflen, uio->uio_resid); 313 cp = buf; 314 if (uio->uio_rw == UIO_WRITE) { 315 error = uiomove(cp, len, uio); 316 if (error) 317 break; 318 } 319 again: 320 s1 = splsoftclock(); 321 s2 = splbio(); 322 if (sc->sc_flags & PPIF_UIO) { 323 if (gpibrequest(sc->sc_ic, sc->sc_hdl) == 0) 324 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 325 } 326 /* 327 * Check if we timed out during sleep or uiomove 328 */ 329 splx(s2); 330 if ((sc->sc_flags & PPIF_UIO) == 0) { 331 DPRINTF(PDB_IO, 332 ("ppirw: uiomove/sleep timo, flags %x\n", 333 sc->sc_flags)); 334 if (sc->sc_flags & PPIF_TIMO) { 335 callout_stop(&sc->sc_timo_ch); 336 sc->sc_flags &= ~PPIF_TIMO; 337 } 338 splx(s1); 339 break; 340 } 341 splx(s1); 342 /* 343 * Perform the operation 344 */ 345 if (uio->uio_rw == UIO_WRITE) 346 cnt = gpibsend(sc->sc_ic, address, sc->sc_sec, 347 cp, len); 348 else 349 cnt = gpibrecv(sc->sc_ic, address, sc->sc_sec, 350 cp, len); 351 s1 = splbio(); 352 gpibrelease(sc->sc_ic, sc->sc_hdl); 353 DPRINTF(PDB_IO, ("ppirw: %s(%d, %x, %p, %d) -> %d\n", 354 uio->uio_rw == UIO_READ ? "recv" : "send", 355 address, sc->sc_sec, cp, len, cnt)); 356 splx(s1); 357 if (uio->uio_rw == UIO_READ) { 358 if (cnt) { 359 error = uiomove(cp, cnt, uio); 360 if (error) 361 break; 362 gotdata++; 363 } 364 /* 365 * Didn't get anything this time, but did in the past. 366 * Consider us done. 367 */ 368 else if (gotdata) 369 break; 370 } 371 s1 = splsoftclock(); 372 /* 373 * Operation timeout (or non-blocking), quit now. 374 */ 375 if ((sc->sc_flags & PPIF_UIO) == 0) { 376 DPRINTF(PDB_IO, ("ppirw: timeout/done\n")); 377 splx(s1); 378 break; 379 } 380 /* 381 * Implement inter-read delay 382 */ 383 if (sc->sc_delay > 0) { 384 sc->sc_flags |= PPIF_DELAY; 385 callout_reset(&sc->sc_start_ch, sc->sc_delay, 386 ppistart, sc); 387 error = tsleep(sc, (PCATCH|PZERO) + 1, "gpib", 0); 388 if (error) { 389 splx(s1); 390 break; 391 } 392 } 393 splx(s1); 394 /* 395 * Must not call uiomove again til we've used all data 396 * that we already grabbed. 397 */ 398 if (uio->uio_rw == UIO_WRITE && cnt != len) { 399 cp += cnt; 400 len -= cnt; 401 cnt = 0; 402 goto again; 403 } 404 } 405 s1 = splsoftclock(); 406 if (sc->sc_flags & PPIF_TIMO) { 407 callout_stop(&sc->sc_timo_ch); 408 sc->sc_flags &= ~PPIF_TIMO; 409 } 410 if (sc->sc_flags & PPIF_DELAY) { 411 callout_stop(&sc->sc_start_ch); 412 sc->sc_flags &= ~PPIF_DELAY; 413 } 414 splx(s1); 415 /* 416 * Adjust for those chars that we uiomove'ed but never wrote 417 */ 418 if (uio->uio_rw == UIO_WRITE && cnt != len) { 419 uio->uio_resid += (len - cnt); 420 DPRINTF(PDB_IO, ("ppirw: short write, adjust by %d\n", 421 len - cnt)); 422 } 423 free(buf, M_DEVBUF); 424 DPRINTF(PDB_FOLLOW|PDB_IO, ("ppirw: return %d, resid %d\n", 425 error, uio->uio_resid)); 426 return (error); 427 } 428 429 int 430 ppiioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 431 { 432 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 433 struct ppiparam *pp, *upp; 434 int error = 0; 435 436 switch (cmd) { 437 case PPIIOCGPARAM: 438 pp = &sc->sc_param; 439 upp = (struct ppiparam *)data; 440 upp->burst = pp->burst; 441 upp->timo = ppihztoms(pp->timo); 442 upp->delay = ppihztoms(pp->delay); 443 break; 444 case PPIIOCSPARAM: 445 pp = &sc->sc_param; 446 upp = (struct ppiparam *)data; 447 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 448 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 449 return (EINVAL); 450 pp->burst = upp->burst; 451 pp->timo = ppimstohz(upp->timo); 452 pp->delay = ppimstohz(upp->delay); 453 break; 454 case PPIIOCSSEC: 455 sc->sc_sec = *(int *)data; 456 break; 457 default: 458 return (EINVAL); 459 } 460 return (error); 461 } 462 463 int 464 ppihztoms(int h) 465 { 466 extern int hz; 467 int m = h; 468 469 if (m > 0) 470 m = m * 1000 / hz; 471 return (m); 472 } 473 474 int 475 ppimstohz(int m) 476 { 477 extern int hz; 478 int h = m; 479 480 if (h > 0) { 481 h = h * hz / 1000; 482 if (h == 0) 483 h = 1000 / hz; 484 } 485 return (h); 486 } 487
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