ppi.c revision 1.18
1 /* $NetBSD: ppi.c,v 1.18 2009/09/12 18:43:03 tsutsui 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 1.18 2009/09/12 18:43:03 tsutsui 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(device_t, cfdata_t, void *); 107 void ppiattach(device_t, device_t, 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(device_t parent, cfdata_t match, void *aux) 147 { 148 149 return (1); 150 } 151 152 void 153 ppiattach(device_t parent, device_t self, void *aux) 154 { 155 struct ppi_softc *sc = device_private(self); 156 struct gpib_attach_args *ga = aux; 157 158 printf("\n"); 159 160 sc->sc_ic = ga->ga_ic; 161 sc->sc_address = ga->ga_address; 162 163 callout_init(&sc->sc_timo_ch, 0); 164 callout_init(&sc->sc_start_ch, 0); 165 166 if (gpibregister(sc->sc_ic, sc->sc_address, ppicallback, sc, 167 &sc->sc_hdl)) { 168 aprint_error_dev(&sc->sc_dev, "can't register callback\n"); 169 return; 170 } 171 172 sc->sc_flags = PPIF_ALIVE; 173 } 174 175 int 176 ppiopen(dev_t dev, int flags, int fmt, struct lwp *l) 177 { 178 struct ppi_softc *sc; 179 180 sc = device_lookup_private(&ppi_cd, UNIT(dev)); 181 if (sc == NULL) 182 return (ENXIO); 183 184 if ((sc->sc_flags & PPIF_ALIVE) == 0) 185 return (ENXIO); 186 187 DPRINTF(PDB_FOLLOW, ("ppiopen(%x, %x): flags %x\n", 188 dev, flags, sc->sc_flags)); 189 190 if (sc->sc_flags & PPIF_OPEN) 191 return (EBUSY); 192 sc->sc_flags |= PPIF_OPEN; 193 sc->sc_burst = PPI_BURST; 194 sc->sc_timo = ppimstohz(PPI_TIMO); 195 sc->sc_delay = ppimstohz(PPI_DELAY); 196 sc->sc_sec = -1; 197 return (0); 198 } 199 200 int 201 ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) 202 { 203 struct ppi_softc *sc; 204 205 sc = device_lookup_private(&ppi_cd, UNIT(dev)); 206 207 DPRINTF(PDB_FOLLOW, ("ppiclose(%x, %x): flags %x\n", 208 dev, flags, sc->sc_flags)); 209 210 sc->sc_flags &= ~PPIF_OPEN; 211 return (0); 212 } 213 214 void 215 ppicallback(void *v, int action) 216 { 217 struct ppi_softc *sc = v; 218 219 DPRINTF(PDB_FOLLOW, ("ppicallback: v=%p, action=%d\n", v, action)); 220 221 switch (action) { 222 case GPIBCBF_START: 223 ppistart(sc); 224 case GPIBCBF_INTR: 225 /* no-op */ 226 break; 227 #ifdef DEBUG 228 default: 229 DPRINTF(PDB_FOLLOW, ("ppicallback: unknown action %d\n", 230 action)); 231 break; 232 #endif 233 } 234 } 235 236 void 237 ppistart(void *v) 238 { 239 struct ppi_softc *sc = v; 240 241 DPRINTF(PDB_FOLLOW, ("ppistart(%x)\n", device_unit(&sc->sc_dev))); 242 243 sc->sc_flags &= ~PPIF_DELAY; 244 wakeup(sc); 245 } 246 247 void 248 ppitimo(void *arg) 249 { 250 struct ppi_softc *sc = arg; 251 252 DPRINTF(PDB_FOLLOW, ("ppitimo(%x)\n", device_unit(&sc->sc_dev))); 253 254 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 255 wakeup(sc); 256 } 257 258 int 259 ppiread(dev_t dev, struct uio *uio, int flags) 260 { 261 262 DPRINTF(PDB_FOLLOW, ("ppiread(%x, %p)\n", dev, uio)); 263 264 return (ppirw(dev, uio)); 265 } 266 267 int 268 ppiwrite(dev_t dev, struct uio *uio, int flags) 269 { 270 271 DPRINTF(PDB_FOLLOW, ("ppiwrite(%x, %p)\n", dev, uio)); 272 273 return (ppirw(dev, uio)); 274 } 275 276 int 277 ppirw(dev_t dev, struct uio *uio) 278 { 279 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 280 int s1, s2, len, cnt; 281 char *cp; 282 int error = 0, gotdata = 0; 283 int buflen, address; 284 char *buf; 285 286 if (uio->uio_resid == 0) 287 return (0); 288 289 address = sc->sc_address; 290 291 DPRINTF(PDB_FOLLOW|PDB_IO, 292 ("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 293 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 294 sc->sc_burst, sc->sc_timo, uio->uio_resid)); 295 296 buflen = min(sc->sc_burst, uio->uio_resid); 297 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 298 sc->sc_flags |= PPIF_UIO; 299 if (sc->sc_timo > 0) { 300 sc->sc_flags |= PPIF_TIMO; 301 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 302 } 303 len = cnt = 0; 304 while (uio->uio_resid > 0) { 305 len = min(buflen, uio->uio_resid); 306 cp = buf; 307 if (uio->uio_rw == UIO_WRITE) { 308 error = uiomove(cp, len, uio); 309 if (error) 310 break; 311 } 312 again: 313 s1 = splsoftclock(); 314 s2 = splbio(); 315 if (sc->sc_flags & PPIF_UIO) { 316 if (gpibrequest(sc->sc_ic, sc->sc_hdl) == 0) 317 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 318 } 319 /* 320 * Check if we timed out during sleep or uiomove 321 */ 322 splx(s2); 323 if ((sc->sc_flags & PPIF_UIO) == 0) { 324 DPRINTF(PDB_IO, 325 ("ppirw: uiomove/sleep timo, flags %x\n", 326 sc->sc_flags)); 327 if (sc->sc_flags & PPIF_TIMO) { 328 callout_stop(&sc->sc_timo_ch); 329 sc->sc_flags &= ~PPIF_TIMO; 330 } 331 splx(s1); 332 break; 333 } 334 splx(s1); 335 /* 336 * Perform the operation 337 */ 338 if (uio->uio_rw == UIO_WRITE) 339 cnt = gpibsend(sc->sc_ic, address, sc->sc_sec, 340 cp, len); 341 else 342 cnt = gpibrecv(sc->sc_ic, address, sc->sc_sec, 343 cp, len); 344 s1 = splbio(); 345 gpibrelease(sc->sc_ic, sc->sc_hdl); 346 DPRINTF(PDB_IO, ("ppirw: %s(%d, %x, %p, %d) -> %d\n", 347 uio->uio_rw == UIO_READ ? "recv" : "send", 348 address, sc->sc_sec, cp, len, cnt)); 349 splx(s1); 350 if (uio->uio_rw == UIO_READ) { 351 if (cnt) { 352 error = uiomove(cp, cnt, uio); 353 if (error) 354 break; 355 gotdata++; 356 } 357 /* 358 * Didn't get anything this time, but did in the past. 359 * Consider us done. 360 */ 361 else if (gotdata) 362 break; 363 } 364 s1 = splsoftclock(); 365 /* 366 * Operation timeout (or non-blocking), quit now. 367 */ 368 if ((sc->sc_flags & PPIF_UIO) == 0) { 369 DPRINTF(PDB_IO, ("ppirw: timeout/done\n")); 370 splx(s1); 371 break; 372 } 373 /* 374 * Implement inter-read delay 375 */ 376 if (sc->sc_delay > 0) { 377 sc->sc_flags |= PPIF_DELAY; 378 callout_reset(&sc->sc_start_ch, sc->sc_delay, 379 ppistart, sc); 380 error = tsleep(sc, (PCATCH|PZERO) + 1, "gpib", 0); 381 if (error) { 382 splx(s1); 383 break; 384 } 385 } 386 splx(s1); 387 /* 388 * Must not call uiomove again til we've used all data 389 * that we already grabbed. 390 */ 391 if (uio->uio_rw == UIO_WRITE && cnt != len) { 392 cp += cnt; 393 len -= cnt; 394 cnt = 0; 395 goto again; 396 } 397 } 398 s1 = splsoftclock(); 399 if (sc->sc_flags & PPIF_TIMO) { 400 callout_stop(&sc->sc_timo_ch); 401 sc->sc_flags &= ~PPIF_TIMO; 402 } 403 if (sc->sc_flags & PPIF_DELAY) { 404 callout_stop(&sc->sc_start_ch); 405 sc->sc_flags &= ~PPIF_DELAY; 406 } 407 splx(s1); 408 /* 409 * Adjust for those chars that we uiomove'ed but never wrote 410 */ 411 if (uio->uio_rw == UIO_WRITE && cnt != len) { 412 uio->uio_resid += (len - cnt); 413 DPRINTF(PDB_IO, ("ppirw: short write, adjust by %d\n", 414 len - cnt)); 415 } 416 free(buf, M_DEVBUF); 417 DPRINTF(PDB_FOLLOW|PDB_IO, ("ppirw: return %d, resid %d\n", 418 error, uio->uio_resid)); 419 return (error); 420 } 421 422 int 423 ppiioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 424 { 425 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 426 struct ppiparam *pp, *upp; 427 int error = 0; 428 429 switch (cmd) { 430 case PPIIOCGPARAM: 431 pp = &sc->sc_param; 432 upp = (struct ppiparam *)data; 433 upp->burst = pp->burst; 434 upp->timo = ppihztoms(pp->timo); 435 upp->delay = ppihztoms(pp->delay); 436 break; 437 case PPIIOCSPARAM: 438 pp = &sc->sc_param; 439 upp = (struct ppiparam *)data; 440 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 441 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 442 return (EINVAL); 443 pp->burst = upp->burst; 444 pp->timo = ppimstohz(upp->timo); 445 pp->delay = ppimstohz(upp->delay); 446 break; 447 case PPIIOCSSEC: 448 sc->sc_sec = *(int *)data; 449 break; 450 default: 451 return (EINVAL); 452 } 453 return (error); 454 } 455 456 int 457 ppihztoms(int h) 458 { 459 extern int hz; 460 int m = h; 461 462 if (m > 0) 463 m = m * 1000 / hz; 464 return (m); 465 } 466 467 int 468 ppimstohz(int m) 469 { 470 extern int hz; 471 int h = m; 472 473 if (h > 0) { 474 h = h * hz / 1000; 475 if (h == 0) 476 h = 1000 / hz; 477 } 478 return (h); 479 } 480
Indexes created Wed Oct 01 07:09:59 GMT 2025