ppi.c revision 1.19.12.2
1 /* $NetBSD: ppi.c,v 1.19.12.2 2014/05/22 11:40:21 yamt 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 1.19.12.2 2014/05/22 11:40:21 yamt 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 device_t 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(device_t, cfdata_t, void *); 107 void ppiattach(device_t, device_t, void *); 108 109 CFATTACH_DECL_NEW(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 .d_open = ppiopen, 130 .d_close = ppiclose, 131 .d_read = ppiread, 132 .d_write = ppiwrite, 133 .d_ioctl = ppiioctl, 134 .d_stop = nostop, 135 .d_tty = notty, 136 .d_poll = nopoll, 137 .d_mmap = nommap, 138 .d_kqfilter = nokqfilter, 139 .d_flag = D_OTHER 140 }; 141 142 #define UNIT(x) minor(x) 143 144 #ifdef DEBUG 145 int ppidebug = 0x80; 146 #define PDB_FOLLOW 0x01 147 #define PDB_IO 0x02 148 #define PDB_NOCHECK 0x80 149 #define DPRINTF(mask, str) if (ppidebug & (mask)) printf str 150 #else 151 #define DPRINTF(mask, str) /* nothing */ 152 #endif 153 154 int 155 ppimatch(device_t parent, cfdata_t match, void *aux) 156 { 157 158 return (1); 159 } 160 161 void 162 ppiattach(device_t parent, device_t self, void *aux) 163 { 164 struct ppi_softc *sc = device_private(self); 165 struct gpib_attach_args *ga = aux; 166 167 printf("\n"); 168 169 sc->sc_ic = ga->ga_ic; 170 sc->sc_address = ga->ga_address; 171 172 callout_init(&sc->sc_timo_ch, 0); 173 callout_init(&sc->sc_start_ch, 0); 174 175 if (gpibregister(sc->sc_ic, sc->sc_address, ppicallback, sc, 176 &sc->sc_hdl)) { 177 aprint_error_dev(sc->sc_dev, "can't register callback\n"); 178 return; 179 } 180 181 sc->sc_flags = PPIF_ALIVE; 182 } 183 184 int 185 ppiopen(dev_t dev, int flags, int fmt, struct lwp *l) 186 { 187 struct ppi_softc *sc; 188 189 sc = device_lookup_private(&ppi_cd, UNIT(dev)); 190 if (sc == NULL) 191 return (ENXIO); 192 193 if ((sc->sc_flags & PPIF_ALIVE) == 0) 194 return (ENXIO); 195 196 DPRINTF(PDB_FOLLOW, ("ppiopen(%" PRIx64 ", %x): flags %x\n", 197 dev, flags, sc->sc_flags)); 198 199 if (sc->sc_flags & PPIF_OPEN) 200 return (EBUSY); 201 sc->sc_flags |= PPIF_OPEN; 202 sc->sc_burst = PPI_BURST; 203 sc->sc_timo = ppimstohz(PPI_TIMO); 204 sc->sc_delay = ppimstohz(PPI_DELAY); 205 sc->sc_sec = -1; 206 return (0); 207 } 208 209 int 210 ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) 211 { 212 struct ppi_softc *sc; 213 214 sc = device_lookup_private(&ppi_cd, UNIT(dev)); 215 216 DPRINTF(PDB_FOLLOW, ("ppiclose(%" PRIx64 ", %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(void *v, int action) 225 { 226 struct ppi_softc *sc = v; 227 228 DPRINTF(PDB_FOLLOW, ("ppicallback: v=%p, action=%d\n", v, action)); 229 230 switch (action) { 231 case GPIBCBF_START: 232 ppistart(sc); 233 case GPIBCBF_INTR: 234 /* no-op */ 235 break; 236 #ifdef DEBUG 237 default: 238 DPRINTF(PDB_FOLLOW, ("ppicallback: unknown action %d\n", 239 action)); 240 break; 241 #endif 242 } 243 } 244 245 void 246 ppistart(void *v) 247 { 248 struct ppi_softc *sc = v; 249 250 DPRINTF(PDB_FOLLOW, ("ppistart(%x)\n", device_unit(sc->sc_dev))); 251 252 sc->sc_flags &= ~PPIF_DELAY; 253 wakeup(sc); 254 } 255 256 void 257 ppitimo(void *arg) 258 { 259 struct ppi_softc *sc = arg; 260 261 DPRINTF(PDB_FOLLOW, ("ppitimo(%x)\n", device_unit(sc->sc_dev))); 262 263 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 264 wakeup(sc); 265 } 266 267 int 268 ppiread(dev_t dev, struct uio *uio, int flags) 269 { 270 271 DPRINTF(PDB_FOLLOW, ("ppiread(%" PRIx64 ", %p)\n", dev, uio)); 272 273 return (ppirw(dev, uio)); 274 } 275 276 int 277 ppiwrite(dev_t dev, struct uio *uio, int flags) 278 { 279 280 DPRINTF(PDB_FOLLOW, ("ppiwrite(%" PRIx64 ", %p)\n", dev, uio)); 281 282 return (ppirw(dev, uio)); 283 } 284 285 int 286 ppirw(dev_t dev, struct uio *uio) 287 { 288 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 289 int s1, s2, len, cnt; 290 char *cp; 291 int error = 0, gotdata = 0; 292 int buflen, address; 293 char *buf; 294 295 if (uio->uio_resid == 0) 296 return (0); 297 298 address = sc->sc_address; 299 300 DPRINTF(PDB_FOLLOW|PDB_IO, 301 ("ppirw(%" PRIx64 ", %p, %c): burst %d, timo %d, resid %x\n", 302 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 303 sc->sc_burst, sc->sc_timo, uio->uio_resid)); 304 305 buflen = min(sc->sc_burst, uio->uio_resid); 306 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 307 sc->sc_flags |= PPIF_UIO; 308 if (sc->sc_timo > 0) { 309 sc->sc_flags |= PPIF_TIMO; 310 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 311 } 312 len = cnt = 0; 313 while (uio->uio_resid > 0) { 314 len = min(buflen, uio->uio_resid); 315 cp = buf; 316 if (uio->uio_rw == UIO_WRITE) { 317 error = uiomove(cp, len, uio); 318 if (error) 319 break; 320 } 321 again: 322 s1 = splsoftclock(); 323 s2 = splbio(); 324 if (sc->sc_flags & PPIF_UIO) { 325 if (gpibrequest(sc->sc_ic, sc->sc_hdl) == 0) 326 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 327 } 328 /* 329 * Check if we timed out during sleep or uiomove 330 */ 331 splx(s2); 332 if ((sc->sc_flags & PPIF_UIO) == 0) { 333 DPRINTF(PDB_IO, 334 ("ppirw: uiomove/sleep timo, flags %x\n", 335 sc->sc_flags)); 336 if (sc->sc_flags & PPIF_TIMO) { 337 callout_stop(&sc->sc_timo_ch); 338 sc->sc_flags &= ~PPIF_TIMO; 339 } 340 splx(s1); 341 break; 342 } 343 splx(s1); 344 /* 345 * Perform the operation 346 */ 347 if (uio->uio_rw == UIO_WRITE) 348 cnt = gpibsend(sc->sc_ic, address, sc->sc_sec, 349 cp, len); 350 else 351 cnt = gpibrecv(sc->sc_ic, address, sc->sc_sec, 352 cp, len); 353 s1 = splbio(); 354 gpibrelease(sc->sc_ic, sc->sc_hdl); 355 DPRINTF(PDB_IO, ("ppirw: %s(%d, %x, %p, %d) -> %d\n", 356 uio->uio_rw == UIO_READ ? "recv" : "send", 357 address, sc->sc_sec, cp, len, cnt)); 358 splx(s1); 359 if (uio->uio_rw == UIO_READ) { 360 if (cnt) { 361 error = uiomove(cp, cnt, uio); 362 if (error) 363 break; 364 gotdata++; 365 } 366 /* 367 * Didn't get anything this time, but did in the past. 368 * Consider us done. 369 */ 370 else if (gotdata) 371 break; 372 } 373 s1 = splsoftclock(); 374 /* 375 * Operation timeout (or non-blocking), quit now. 376 */ 377 if ((sc->sc_flags & PPIF_UIO) == 0) { 378 DPRINTF(PDB_IO, ("ppirw: timeout/done\n")); 379 splx(s1); 380 break; 381 } 382 /* 383 * Implement inter-read delay 384 */ 385 if (sc->sc_delay > 0) { 386 sc->sc_flags |= PPIF_DELAY; 387 callout_reset(&sc->sc_start_ch, sc->sc_delay, 388 ppistart, sc); 389 error = tsleep(sc, (PCATCH|PZERO) + 1, "gpib", 0); 390 if (error) { 391 splx(s1); 392 break; 393 } 394 } 395 splx(s1); 396 /* 397 * Must not call uiomove again til we've used all data 398 * that we already grabbed. 399 */ 400 if (uio->uio_rw == UIO_WRITE && cnt != len) { 401 cp += cnt; 402 len -= cnt; 403 cnt = 0; 404 goto again; 405 } 406 } 407 s1 = splsoftclock(); 408 if (sc->sc_flags & PPIF_TIMO) { 409 callout_stop(&sc->sc_timo_ch); 410 sc->sc_flags &= ~PPIF_TIMO; 411 } 412 if (sc->sc_flags & PPIF_DELAY) { 413 callout_stop(&sc->sc_start_ch); 414 sc->sc_flags &= ~PPIF_DELAY; 415 } 416 splx(s1); 417 /* 418 * Adjust for those chars that we uiomove'ed but never wrote 419 */ 420 if (uio->uio_rw == UIO_WRITE && cnt != len) { 421 uio->uio_resid += (len - cnt); 422 DPRINTF(PDB_IO, ("ppirw: short write, adjust by %d\n", 423 len - cnt)); 424 } 425 free(buf, M_DEVBUF); 426 DPRINTF(PDB_FOLLOW|PDB_IO, ("ppirw: return %d, resid %d\n", 427 error, uio->uio_resid)); 428 return (error); 429 } 430 431 int 432 ppiioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 433 { 434 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 435 struct ppiparam *pp, *upp; 436 int error = 0; 437 438 switch (cmd) { 439 case PPIIOCGPARAM: 440 pp = &sc->sc_param; 441 upp = (struct ppiparam *)data; 442 upp->burst = pp->burst; 443 upp->timo = ppihztoms(pp->timo); 444 upp->delay = ppihztoms(pp->delay); 445 break; 446 case PPIIOCSPARAM: 447 pp = &sc->sc_param; 448 upp = (struct ppiparam *)data; 449 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 450 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 451 return (EINVAL); 452 pp->burst = upp->burst; 453 pp->timo = ppimstohz(upp->timo); 454 pp->delay = ppimstohz(upp->delay); 455 break; 456 case PPIIOCSSEC: 457 sc->sc_sec = *(int *)data; 458 break; 459 default: 460 return (EINVAL); 461 } 462 return (error); 463 } 464 465 int 466 ppihztoms(int h) 467 { 468 extern int hz; 469 int m = h; 470 471 if (m > 0) 472 m = m * 1000 / hz; 473 return (m); 474 } 475 476 int 477 ppimstohz(int m) 478 { 479 extern int hz; 480 int h = m; 481 482 if (h > 0) { 483 h = h * hz / 1000; 484 if (h == 0) 485 h = 1000 / hz; 486 } 487 return (h); 488 } 489
Indexes created Wed Oct 01 15:09:59 GMT 2025