ppi.c revision 1.37
1 /* $NetBSD: ppi.c,v 1.37 2007/07/12 20:39:01 he Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1982, 1990, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * 67 * @(#)ppi.c 8.1 (Berkeley) 6/16/93 68 */ 69 70 /* 71 * Printer/Plotter HPIB interface 72 */ 73 74 #include <sys/cdefs.h> 75 __KERNEL_RCSID(0, "$NetBSD: ppi.c,v 1.37 2007/07/12 20:39:01 he Exp $"); 76 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/callout.h> 80 #include <sys/conf.h> 81 #include <sys/device.h> 82 #include <sys/errno.h> 83 #include <sys/malloc.h> 84 #include <sys/proc.h> 85 #include <sys/uio.h> 86 87 #include <hp300/dev/hpibvar.h> 88 89 #include <hp300/dev/ppiioctl.h> 90 91 #include "ioconf.h" 92 93 struct ppi_softc { 94 struct device sc_dev; 95 int sc_flags; 96 struct hpibqueue sc_hq; /* HP-IB job queue entry */ 97 struct ppiparam sc_param; 98 #define sc_burst sc_param.burst 99 #define sc_timo sc_param.timo 100 #define sc_delay sc_param.delay 101 int sc_sec; 102 int sc_slave; /* HP-IB slave address */ 103 struct callout sc_timo_ch; 104 struct callout sc_start_ch; 105 }; 106 107 /* sc_flags values */ 108 #define PPIF_ALIVE 0x01 109 #define PPIF_OPEN 0x02 110 #define PPIF_UIO 0x04 111 #define PPIF_TIMO 0x08 112 #define PPIF_DELAY 0x10 113 114 static int ppimatch(struct device *, struct cfdata *, void *); 115 static void ppiattach(struct device *, struct device *, void *); 116 117 CFATTACH_DECL(ppi, sizeof(struct ppi_softc), 118 ppimatch, ppiattach, NULL, NULL); 119 120 static dev_type_open(ppiopen); 121 static dev_type_close(ppiclose); 122 static dev_type_read(ppiread); 123 static dev_type_write(ppiwrite); 124 static dev_type_ioctl(ppiioctl); 125 126 const struct cdevsw ppi_cdevsw = { 127 ppiopen, ppiclose, ppiread, ppiwrite, ppiioctl, 128 nostop, notty, nopoll, nommap, nokqfilter, 129 }; 130 131 static void ppistart(void *); 132 static void ppinoop(void *); 133 134 static void ppitimo(void *); 135 static int ppirw(dev_t, struct uio *); 136 static int ppihztoms(int); 137 static int ppimstohz(int); 138 139 #define UNIT(x) minor(x) 140 141 #ifdef DEBUG 142 int ppidebug = 0x80; 143 #define PDB_FOLLOW 0x01 144 #define PDB_IO 0x02 145 #define PDB_NOCHECK 0x80 146 #endif 147 148 static int 149 ppimatch(struct device *parent, struct cfdata *match, void *aux) 150 { 151 struct hpibbus_attach_args *ha = aux; 152 153 /* 154 * The printer/plotter doesn't return an ID tag. 155 * The check below prevents us from matching a CS80 156 * device by mistake. 157 */ 158 if (ha->ha_id & 0x200) 159 return 0; 160 161 /* 162 * To prevent matching all unused slots on the bus, we 163 * don't allow wildcarded locators. 164 */ 165 if (match->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || 166 match->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) 167 return 0; 168 169 return 1; 170 } 171 172 static void 173 ppiattach(struct device *parent, struct device *self, void *aux) 174 { 175 struct ppi_softc *sc = (struct ppi_softc *)self; 176 struct hpibbus_attach_args *ha = aux; 177 178 printf("\n"); 179 180 sc->sc_slave = ha->ha_slave; 181 182 callout_init(&sc->sc_timo_ch, 0); 183 callout_init(&sc->sc_start_ch, 0); 184 185 /* Initialize the hpib queue entry. */ 186 sc->sc_hq.hq_softc = sc; 187 sc->sc_hq.hq_slave = sc->sc_slave; 188 sc->sc_hq.hq_start = ppistart; 189 sc->sc_hq.hq_go = ppinoop; 190 sc->sc_hq.hq_intr = ppinoop; 191 192 sc->sc_flags = PPIF_ALIVE; 193 } 194 195 static void 196 ppinoop(void *arg) 197 { 198 /* Noop! */ 199 } 200 201 int 202 ppiopen(dev_t dev, int flags, int fmt, struct lwp *l) 203 { 204 int unit = UNIT(dev); 205 struct ppi_softc *sc; 206 207 if (unit >= ppi_cd.cd_ndevs || 208 (sc = ppi_cd.cd_devs[unit]) == NULL || 209 (sc->sc_flags & PPIF_ALIVE) == 0) 210 return ENXIO; 211 212 #ifdef DEBUG 213 if (ppidebug & PDB_FOLLOW) 214 printf("ppiopen(%x, %x): flags %x\n", 215 dev, flags, sc->sc_flags); 216 #endif 217 if (sc->sc_flags & PPIF_OPEN) 218 return EBUSY; 219 sc->sc_flags |= PPIF_OPEN; 220 sc->sc_burst = PPI_BURST; 221 sc->sc_timo = ppimstohz(PPI_TIMO); 222 sc->sc_delay = ppimstohz(PPI_DELAY); 223 sc->sc_sec = -1; 224 return 0; 225 } 226 227 static int 228 ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) 229 { 230 int unit = UNIT(dev); 231 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 232 233 #ifdef DEBUG 234 if (ppidebug & PDB_FOLLOW) 235 printf("ppiclose(%x, %x): flags %x\n", 236 dev, flags, sc->sc_flags); 237 #endif 238 sc->sc_flags &= ~PPIF_OPEN; 239 return 0; 240 } 241 242 static void 243 ppistart(void *arg) 244 { 245 struct ppi_softc *sc = arg; 246 247 #ifdef DEBUG 248 if (ppidebug & PDB_FOLLOW) 249 printf("ppistart(%x)\n", device_unit(&sc->sc_dev)); 250 #endif 251 sc->sc_flags &= ~PPIF_DELAY; 252 wakeup(sc); 253 } 254 255 static void 256 ppitimo(void *arg) 257 { 258 struct ppi_softc *sc = arg; 259 260 #ifdef DEBUG 261 if (ppidebug & PDB_FOLLOW) 262 printf("ppitimo(%x)\n", device_unit(&sc->sc_dev)); 263 #endif 264 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 265 wakeup(sc); 266 } 267 268 static int 269 ppiread(dev_t dev, struct uio *uio, int flags) 270 { 271 272 #ifdef DEBUG 273 if (ppidebug & PDB_FOLLOW) 274 printf("ppiread(%x, %p)\n", dev, uio); 275 #endif 276 return ppirw(dev, uio); 277 } 278 279 static int 280 ppiwrite(dev_t dev, struct uio *uio, int flags) 281 { 282 283 #ifdef DEBUG 284 if (ppidebug & PDB_FOLLOW) 285 printf("ppiwrite(%x, %p)\n", dev, uio); 286 #endif 287 return ppirw(dev, uio); 288 } 289 290 static int 291 ppirw(dev_t dev, struct uio *uio) 292 { 293 int unit = UNIT(dev); 294 struct ppi_softc *sc = ppi_cd.cd_devs[unit]; 295 int s, s2, len, cnt; 296 char *cp; 297 int error = 0, gotdata = 0; 298 int buflen, ctlr, slave; 299 char *buf; 300 301 if (uio->uio_resid == 0) 302 return 0; 303 304 ctlr = device_unit(device_parent(&sc->sc_dev)); 305 slave = sc->sc_slave; 306 307 #ifdef DEBUG 308 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 309 printf("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 310 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 311 sc->sc_burst, sc->sc_timo, uio->uio_resid); 312 #endif 313 buflen = min(sc->sc_burst, uio->uio_resid); 314 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 315 sc->sc_flags |= PPIF_UIO; 316 if (sc->sc_timo > 0) { 317 sc->sc_flags |= PPIF_TIMO; 318 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 319 } 320 len = cnt = 0; 321 while (uio->uio_resid > 0) { 322 len = min(buflen, uio->uio_resid); 323 cp = buf; 324 if (uio->uio_rw == UIO_WRITE) { 325 error = uiomove(cp, len, uio); 326 if (error) 327 break; 328 } 329 again: 330 s = splsoftclock(); 331 s2 = splbio(); 332 if ((sc->sc_flags & PPIF_UIO) && 333 hpibreq(device_parent(&sc->sc_dev), &sc->sc_hq) == 0) 334 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 335 /* 336 * Check if we timed out during sleep or uiomove 337 */ 338 splx(s2); 339 if ((sc->sc_flags & PPIF_UIO) == 0) { 340 #ifdef DEBUG 341 if (ppidebug & PDB_IO) 342 printf("ppirw: uiomove/sleep timo, flags %x\n", 343 sc->sc_flags); 344 #endif 345 if (sc->sc_flags & PPIF_TIMO) { 346 callout_stop(&sc->sc_timo_ch); 347 sc->sc_flags &= ~PPIF_TIMO; 348 } 349 splx(s); 350 break; 351 } 352 splx(s); 353 /* 354 * Perform the operation 355 */ 356 if (uio->uio_rw == UIO_WRITE) 357 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 358 else 359 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 360 s = splbio(); 361 hpibfree(device_parent(&sc->sc_dev), &sc->sc_hq); 362 #ifdef DEBUG 363 if (ppidebug & PDB_IO) 364 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 365 uio->uio_rw == UIO_READ ? "recv" : "send", 366 ctlr, slave, sc->sc_sec, cp, len, cnt); 367 #endif 368 splx(s); 369 if (uio->uio_rw == UIO_READ) { 370 if (cnt) { 371 error = uiomove(cp, cnt, uio); 372 if (error) 373 break; 374 gotdata++; 375 } 376 /* 377 * Didn't get anything this time, but did in the past. 378 * Consider us done. 379 */ 380 else if (gotdata) 381 break; 382 } 383 s = splsoftclock(); 384 /* 385 * Operation timeout (or non-blocking), quit now. 386 */ 387 if ((sc->sc_flags & PPIF_UIO) == 0) { 388 #ifdef DEBUG 389 if (ppidebug & PDB_IO) 390 printf("ppirw: timeout/done\n"); 391 #endif 392 splx(s); 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, "hpib", 0); 403 if (error) { 404 splx(s); 405 break; 406 } 407 } 408 splx(s); 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 s = 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(s); 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 #ifdef DEBUG 436 if (ppidebug & PDB_IO) 437 printf("ppirw: short write, adjust by %d\n", 438 len-cnt); 439 #endif 440 } 441 free(buf, M_DEVBUF); 442 #ifdef DEBUG 443 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 444 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 445 #endif 446 return error; 447 } 448 449 static int 450 ppiioctl(dev_t dev, u_long cmd, void *data, int flag, 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 static int 484 ppihztoms(int h) 485 { 486 extern int hz; 487 int m = h; 488 489 if (m > 0) 490 m = m * 1000 / hz; 491 return m; 492 } 493 494 static int 495 ppimstohz(int m) 496 { 497 extern int hz; 498 int h = m; 499 500 if (h > 0) { 501 h = h * hz / 1000; 502 if (h == 0) 503 h = 1000 / hz; 504 } 505 return h; 506 } 507
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