ppi.c revision 1.19.6.1
1 /* $NetBSD: ppi.c,v 1.19.6.1 2001/10/10 11:56:05 fvdl 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. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)ppi.c 8.1 (Berkeley) 6/16/93 72 */ 73 74 /* 75 * Printer/Plotter HPIB interface 76 */ 77 78 #include <sys/param.h> 79 #include <sys/systm.h> 80 #include <sys/callout.h> 81 #include <sys/conf.h> 82 #include <sys/device.h> 83 #include <sys/errno.h> 84 #include <sys/malloc.h> 85 #include <sys/proc.h> 86 #include <sys/uio.h> 87 #include <sys/vnode.h> 88 89 #include <hp300/dev/hpibvar.h> 90 91 #include <hp300/dev/ppiioctl.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 int ppimatch __P((struct device *, struct cfdata *, void *)); 115 void ppiattach __P((struct device *, struct device *, void *)); 116 117 struct cfattach ppi_ca = { 118 sizeof(struct ppi_softc), ppimatch, ppiattach 119 }; 120 121 extern struct cfdriver ppi_cd; 122 123 void ppistart __P((void *)); 124 void ppinoop __P((void *)); 125 126 void ppitimo __P((void *)); 127 int ppirw __P((struct vnode *, struct uio *)); 128 int ppihztoms __P((int)); 129 int ppimstohz __P((int)); 130 131 bdev_decl(ppi); 132 cdev_decl(ppi); 133 134 #define UNIT(x) minor(x) 135 136 #ifdef DEBUG 137 int ppidebug = 0x80; 138 #define PDB_FOLLOW 0x01 139 #define PDB_IO 0x02 140 #define PDB_NOCHECK 0x80 141 #endif 142 143 int 144 ppimatch(parent, match, aux) 145 struct device *parent; 146 struct cfdata *match; 147 void *aux; 148 { 149 struct hpibbus_attach_args *ha = aux; 150 151 /* 152 * The printer/plotter doesn't return an ID tag. 153 * The check below prevents us from matching a CS80 154 * device by mistake. 155 */ 156 if (ha->ha_id & 0x200) 157 return (0); 158 159 /* 160 * To prevent matching all unused slots on the bus, we 161 * don't allow wildcarded locators. 162 */ 163 if (match->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || 164 match->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) 165 return (0); 166 167 return (1); 168 } 169 170 void 171 ppiattach(parent, self, aux) 172 struct device *parent, *self; 173 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); 183 callout_init(&sc->sc_start_ch); 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 void 196 ppinoop(arg) 197 void *arg; 198 { 199 /* Noop! */ 200 } 201 202 int 203 ppiopen(devvp, flags, fmt, p) 204 struct vnode *devvp; 205 int flags, fmt; 206 struct proc *p; 207 { 208 dev_t dev = vdev_rdev(devvp); 209 int unit = UNIT(dev); 210 struct ppi_softc *sc; 211 212 if (unit >= ppi_cd.cd_ndevs || 213 (sc = ppi_cd.cd_devs[unit]) == NULL || 214 (sc->sc_flags & PPIF_ALIVE) == 0) 215 return (ENXIO); 216 217 #ifdef DEBUG 218 if (ppidebug & PDB_FOLLOW) 219 printf("ppiopen(%x, %x): flags %x\n", 220 dev, flags, sc->sc_flags); 221 #endif 222 if (sc->sc_flags & PPIF_OPEN) 223 return (EBUSY); 224 225 vdev_setprivdata(devvp, sc); 226 227 sc->sc_flags |= PPIF_OPEN; 228 sc->sc_burst = PPI_BURST; 229 sc->sc_timo = ppimstohz(PPI_TIMO); 230 sc->sc_delay = ppimstohz(PPI_DELAY); 231 sc->sc_sec = -1; 232 return(0); 233 } 234 235 int 236 ppiclose(devvp, flags, fmt, p) 237 struct vnode *devvp; 238 int flags, fmt; 239 struct proc *p; 240 { 241 struct ppi_softc *sc = vdev_privdata(devvp); 242 243 #ifdef DEBUG 244 if (ppidebug & PDB_FOLLOW) 245 printf("ppiclose(%x, %x): flags %x\n", 246 dev, flags, sc->sc_flags); 247 #endif 248 sc->sc_flags &= ~PPIF_OPEN; 249 return(0); 250 } 251 252 void 253 ppistart(arg) 254 void *arg; 255 { 256 struct ppi_softc *sc = arg; 257 258 #ifdef DEBUG 259 if (ppidebug & PDB_FOLLOW) 260 printf("ppistart(%x)\n", sc->sc_dev.dv_unit); 261 #endif 262 sc->sc_flags &= ~PPIF_DELAY; 263 wakeup(sc); 264 } 265 266 void 267 ppitimo(arg) 268 void *arg; 269 { 270 struct ppi_softc *sc = arg; 271 272 #ifdef DEBUG 273 if (ppidebug & PDB_FOLLOW) 274 printf("ppitimo(%x)\n", sc->sc_dev.dv_unit); 275 #endif 276 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 277 wakeup(sc); 278 } 279 280 int 281 ppiread(devvp, uio, flags) 282 struct vnode *devvp; 283 struct uio *uio; 284 int flags; 285 { 286 287 #ifdef DEBUG 288 if (ppidebug & PDB_FOLLOW) 289 printf("ppiread(%x, %p)\n", vdev_rdev(devvp), uio); 290 #endif 291 return (ppirw(devvp, uio)); 292 } 293 294 int 295 ppiwrite(devvp, uio, flags) 296 struct vnode *devvp; 297 struct uio *uio; 298 int flags; 299 { 300 301 #ifdef DEBUG 302 if (ppidebug & PDB_FOLLOW) 303 printf("ppiwrite(%x, %p)\n", vdev_rdev(devvp), uio); 304 #endif 305 return (ppirw(devvp, uio)); 306 } 307 308 int 309 ppirw(devvp, uio) 310 struct vnode *devvp; 311 struct uio *uio; 312 { 313 struct ppi_softc *sc = vdev_privdata(devvp); 314 int s, len, cnt; 315 char *cp; 316 int error = 0, gotdata = 0; 317 int buflen, ctlr, slave; 318 char *buf; 319 320 if (uio->uio_resid == 0) 321 return(0); 322 323 ctlr = sc->sc_dev.dv_parent->dv_unit; 324 slave = sc->sc_slave; 325 326 #ifdef DEBUG 327 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 328 printf("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 329 vdev_rdev(devvp), uio, 330 uio->uio_rw == UIO_READ ? 'R' : 'W', 331 sc->sc_burst, sc->sc_timo, uio->uio_resid); 332 #endif 333 buflen = min(sc->sc_burst, uio->uio_resid); 334 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 335 sc->sc_flags |= PPIF_UIO; 336 if (sc->sc_timo > 0) { 337 sc->sc_flags |= PPIF_TIMO; 338 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 339 } 340 len = cnt = 0; 341 while (uio->uio_resid > 0) { 342 len = min(buflen, uio->uio_resid); 343 cp = buf; 344 if (uio->uio_rw == UIO_WRITE) { 345 error = uiomove(cp, len, uio); 346 if (error) 347 break; 348 } 349 again: 350 s = splbio(); 351 if ((sc->sc_flags & PPIF_UIO) && 352 hpibreq(sc->sc_dev.dv_parent, &sc->sc_hq) == 0) 353 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 354 /* 355 * Check if we timed out during sleep or uiomove 356 */ 357 (void) spllowersoftclock(); 358 if ((sc->sc_flags & PPIF_UIO) == 0) { 359 #ifdef DEBUG 360 if (ppidebug & PDB_IO) 361 printf("ppirw: uiomove/sleep timo, flags %x\n", 362 sc->sc_flags); 363 #endif 364 if (sc->sc_flags & PPIF_TIMO) { 365 callout_stop(&sc->sc_timo_ch); 366 sc->sc_flags &= ~PPIF_TIMO; 367 } 368 splx(s); 369 break; 370 } 371 splx(s); 372 /* 373 * Perform the operation 374 */ 375 if (uio->uio_rw == UIO_WRITE) 376 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 377 else 378 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 379 s = splbio(); 380 hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq); 381 #ifdef DEBUG 382 if (ppidebug & PDB_IO) 383 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 384 uio->uio_rw == UIO_READ ? "recv" : "send", 385 ctlr, slave, sc->sc_sec, cp, len, cnt); 386 #endif 387 splx(s); 388 if (uio->uio_rw == UIO_READ) { 389 if (cnt) { 390 error = uiomove(cp, cnt, uio); 391 if (error) 392 break; 393 gotdata++; 394 } 395 /* 396 * Didn't get anything this time, but did in the past. 397 * Consider us done. 398 */ 399 else if (gotdata) 400 break; 401 } 402 s = splsoftclock(); 403 /* 404 * Operation timeout (or non-blocking), quit now. 405 */ 406 if ((sc->sc_flags & PPIF_UIO) == 0) { 407 #ifdef DEBUG 408 if (ppidebug & PDB_IO) 409 printf("ppirw: timeout/done\n"); 410 #endif 411 splx(s); 412 break; 413 } 414 /* 415 * Implement inter-read delay 416 */ 417 if (sc->sc_delay > 0) { 418 sc->sc_flags |= PPIF_DELAY; 419 callout_reset(&sc->sc_start_ch, sc->sc_delay, 420 ppistart, sc); 421 error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); 422 if (error) { 423 splx(s); 424 break; 425 } 426 } 427 splx(s); 428 /* 429 * Must not call uiomove again til we've used all data 430 * that we already grabbed. 431 */ 432 if (uio->uio_rw == UIO_WRITE && cnt != len) { 433 cp += cnt; 434 len -= cnt; 435 cnt = 0; 436 goto again; 437 } 438 } 439 s = splsoftclock(); 440 if (sc->sc_flags & PPIF_TIMO) { 441 callout_stop(&sc->sc_timo_ch); 442 sc->sc_flags &= ~PPIF_TIMO; 443 } 444 if (sc->sc_flags & PPIF_DELAY) { 445 callout_stop(&sc->sc_start_ch); 446 sc->sc_flags &= ~PPIF_DELAY; 447 } 448 splx(s); 449 /* 450 * Adjust for those chars that we uiomove'ed but never wrote 451 */ 452 if (uio->uio_rw == UIO_WRITE && cnt != len) { 453 uio->uio_resid += (len - cnt); 454 #ifdef DEBUG 455 if (ppidebug & PDB_IO) 456 printf("ppirw: short write, adjust by %d\n", 457 len-cnt); 458 #endif 459 } 460 free(buf, M_DEVBUF); 461 #ifdef DEBUG 462 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 463 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 464 #endif 465 return (error); 466 } 467 468 int 469 ppiioctl(devvp, cmd, data, flag, p) 470 struct vnode *devvp; 471 u_long cmd; 472 caddr_t data; 473 int flag; 474 struct proc *p; 475 { 476 struct ppi_softc *sc = vdev_privdata(devvp); 477 struct ppiparam *pp, *upp; 478 int error = 0; 479 480 switch (cmd) { 481 case PPIIOCGPARAM: 482 pp = &sc->sc_param; 483 upp = (struct ppiparam *)data; 484 upp->burst = pp->burst; 485 upp->timo = ppihztoms(pp->timo); 486 upp->delay = ppihztoms(pp->delay); 487 break; 488 case PPIIOCSPARAM: 489 pp = &sc->sc_param; 490 upp = (struct ppiparam *)data; 491 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 492 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 493 return(EINVAL); 494 pp->burst = upp->burst; 495 pp->timo = ppimstohz(upp->timo); 496 pp->delay = ppimstohz(upp->delay); 497 break; 498 case PPIIOCSSEC: 499 sc->sc_sec = *(int *)data; 500 break; 501 default: 502 return(EINVAL); 503 } 504 return (error); 505 } 506 507 int 508 ppihztoms(h) 509 int h; 510 { 511 extern int hz; 512 int m = h; 513 514 if (m > 0) 515 m = m * 1000 / hz; 516 return(m); 517 } 518 519 int 520 ppimstohz(m) 521 int m; 522 { 523 extern int hz; 524 int h = m; 525 526 if (h > 0) { 527 h = h * hz / 1000; 528 if (h == 0) 529 h = 1000 / hz; 530 } 531 return(h); 532 } 533
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