ppi.c revision 1.39.4.1
1 /* $NetBSD: ppi.c,v 1.39.4.1 2008/05/16 02:22:22 yamt 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 * 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 HPIB interface 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: ppi.c,v 1.39.4.1 2008/05/16 02:22:22 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/errno.h> 76 #include <sys/malloc.h> 77 #include <sys/proc.h> 78 #include <sys/uio.h> 79 80 #include <hp300/dev/hpibvar.h> 81 82 #include <hp300/dev/ppiioctl.h> 83 84 #include "ioconf.h" 85 86 struct ppi_softc { 87 device_t sc_dev; 88 int sc_flags; 89 struct hpibqueue sc_hq; /* HP-IB job queue entry */ 90 struct ppiparam sc_param; 91 #define sc_burst sc_param.burst 92 #define sc_timo sc_param.timo 93 #define sc_delay sc_param.delay 94 int sc_sec; 95 int sc_slave; /* HP-IB slave address */ 96 struct callout sc_timo_ch; 97 struct callout sc_start_ch; 98 }; 99 100 /* sc_flags values */ 101 #define PPIF_ALIVE 0x01 102 #define PPIF_OPEN 0x02 103 #define PPIF_UIO 0x04 104 #define PPIF_TIMO 0x08 105 #define PPIF_DELAY 0x10 106 107 static int ppimatch(device_t, cfdata_t, void *); 108 static void ppiattach(device_t, device_t, void *); 109 110 CFATTACH_DECL_NEW(ppi, sizeof(struct ppi_softc), 111 ppimatch, ppiattach, NULL, NULL); 112 113 static dev_type_open(ppiopen); 114 static dev_type_close(ppiclose); 115 static dev_type_read(ppiread); 116 static dev_type_write(ppiwrite); 117 static dev_type_ioctl(ppiioctl); 118 119 const struct cdevsw ppi_cdevsw = { 120 ppiopen, ppiclose, ppiread, ppiwrite, ppiioctl, 121 nostop, notty, nopoll, nommap, nokqfilter, 122 }; 123 124 static void ppistart(void *); 125 static void ppinoop(void *); 126 127 static void ppitimo(void *); 128 static int ppirw(dev_t, struct uio *); 129 static int ppihztoms(int); 130 static int ppimstohz(int); 131 132 #define UNIT(x) minor(x) 133 134 #ifdef DEBUG 135 int ppidebug = 0x80; 136 #define PDB_FOLLOW 0x01 137 #define PDB_IO 0x02 138 #define PDB_NOCHECK 0x80 139 #endif 140 141 static int 142 ppimatch(device_t parent, cfdata_t cf, void *aux) 143 { 144 struct hpibbus_attach_args *ha = aux; 145 146 /* 147 * The printer/plotter doesn't return an ID tag. 148 * The check below prevents us from matching a CS80 149 * device by mistake. 150 */ 151 if (ha->ha_id & 0x200) 152 return 0; 153 154 /* 155 * To prevent matching all unused slots on the bus, we 156 * don't allow wildcarded locators. 157 */ 158 if (cf->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || 159 cf->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) 160 return 0; 161 162 return 1; 163 } 164 165 static void 166 ppiattach(device_t parent, device_t self, void *aux) 167 { 168 struct ppi_softc *sc = device_private(self); 169 struct hpibbus_attach_args *ha = aux; 170 171 sc->sc_dev = self; 172 aprint_normal("\n"); 173 174 sc->sc_slave = ha->ha_slave; 175 176 callout_init(&sc->sc_timo_ch, 0); 177 callout_init(&sc->sc_start_ch, 0); 178 179 /* Initialize the hpib queue entry. */ 180 sc->sc_hq.hq_softc = sc; 181 sc->sc_hq.hq_slave = sc->sc_slave; 182 sc->sc_hq.hq_start = ppistart; 183 sc->sc_hq.hq_go = ppinoop; 184 sc->sc_hq.hq_intr = ppinoop; 185 186 sc->sc_flags = PPIF_ALIVE; 187 } 188 189 static void 190 ppinoop(void *arg) 191 { 192 /* Noop! */ 193 } 194 195 int 196 ppiopen(dev_t dev, int flags, int fmt, struct lwp *l) 197 { 198 int unit = UNIT(dev); 199 struct ppi_softc *sc; 200 201 if (unit >= ppi_cd.cd_ndevs || 202 (sc = device_private(ppi_cd.cd_devs[unit])) == NULL || 203 (sc->sc_flags & PPIF_ALIVE) == 0) 204 return ENXIO; 205 206 #ifdef DEBUG 207 if (ppidebug & PDB_FOLLOW) 208 printf("ppiopen(%x, %x): flags %x\n", 209 dev, flags, sc->sc_flags); 210 #endif 211 if (sc->sc_flags & PPIF_OPEN) 212 return EBUSY; 213 sc->sc_flags |= PPIF_OPEN; 214 sc->sc_burst = PPI_BURST; 215 sc->sc_timo = ppimstohz(PPI_TIMO); 216 sc->sc_delay = ppimstohz(PPI_DELAY); 217 sc->sc_sec = -1; 218 return 0; 219 } 220 221 static int 222 ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) 223 { 224 int unit = UNIT(dev); 225 struct ppi_softc *sc = device_private(ppi_cd.cd_devs[unit]); 226 227 #ifdef DEBUG 228 if (ppidebug & PDB_FOLLOW) 229 printf("ppiclose(%x, %x): flags %x\n", 230 dev, flags, sc->sc_flags); 231 #endif 232 sc->sc_flags &= ~PPIF_OPEN; 233 return 0; 234 } 235 236 static void 237 ppistart(void *arg) 238 { 239 struct ppi_softc *sc = arg; 240 241 #ifdef DEBUG 242 if (ppidebug & PDB_FOLLOW) 243 printf("ppistart(%x)\n", device_unit(sc->sc_dev)); 244 #endif 245 sc->sc_flags &= ~PPIF_DELAY; 246 wakeup(sc); 247 } 248 249 static void 250 ppitimo(void *arg) 251 { 252 struct ppi_softc *sc = arg; 253 254 #ifdef DEBUG 255 if (ppidebug & PDB_FOLLOW) 256 printf("ppitimo(%x)\n", device_unit(sc->sc_dev)); 257 #endif 258 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 259 wakeup(sc); 260 } 261 262 static int 263 ppiread(dev_t dev, struct uio *uio, int flags) 264 { 265 266 #ifdef DEBUG 267 if (ppidebug & PDB_FOLLOW) 268 printf("ppiread(%x, %p)\n", dev, uio); 269 #endif 270 return ppirw(dev, uio); 271 } 272 273 static int 274 ppiwrite(dev_t dev, struct uio *uio, int flags) 275 { 276 277 #ifdef DEBUG 278 if (ppidebug & PDB_FOLLOW) 279 printf("ppiwrite(%x, %p)\n", dev, uio); 280 #endif 281 return ppirw(dev, uio); 282 } 283 284 static int 285 ppirw(dev_t dev, struct uio *uio) 286 { 287 int unit = UNIT(dev); 288 struct ppi_softc *sc = device_private(ppi_cd.cd_devs[unit]); 289 int s, s2, len, cnt; 290 char *cp; 291 int error = 0, gotdata = 0; 292 int buflen, ctlr, slave; 293 char *buf; 294 295 if (uio->uio_resid == 0) 296 return 0; 297 298 ctlr = device_unit(device_parent(sc->sc_dev)); 299 slave = sc->sc_slave; 300 301 #ifdef DEBUG 302 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 303 printf("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 304 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 305 sc->sc_burst, sc->sc_timo, uio->uio_resid); 306 #endif 307 buflen = min(sc->sc_burst, uio->uio_resid); 308 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 309 sc->sc_flags |= PPIF_UIO; 310 if (sc->sc_timo > 0) { 311 sc->sc_flags |= PPIF_TIMO; 312 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 313 } 314 len = cnt = 0; 315 while (uio->uio_resid > 0) { 316 len = min(buflen, uio->uio_resid); 317 cp = buf; 318 if (uio->uio_rw == UIO_WRITE) { 319 error = uiomove(cp, len, uio); 320 if (error) 321 break; 322 } 323 again: 324 s = splsoftclock(); 325 s2 = splbio(); 326 if ((sc->sc_flags & PPIF_UIO) && 327 hpibreq(device_parent(sc->sc_dev), &sc->sc_hq) == 0) 328 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 329 /* 330 * Check if we timed out during sleep or uiomove 331 */ 332 splx(s2); 333 if ((sc->sc_flags & PPIF_UIO) == 0) { 334 #ifdef DEBUG 335 if (ppidebug & PDB_IO) 336 printf("ppirw: uiomove/sleep timo, flags %x\n", 337 sc->sc_flags); 338 #endif 339 if (sc->sc_flags & PPIF_TIMO) { 340 callout_stop(&sc->sc_timo_ch); 341 sc->sc_flags &= ~PPIF_TIMO; 342 } 343 splx(s); 344 break; 345 } 346 splx(s); 347 /* 348 * Perform the operation 349 */ 350 if (uio->uio_rw == UIO_WRITE) 351 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 352 else 353 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 354 s = splbio(); 355 hpibfree(device_parent(sc->sc_dev), &sc->sc_hq); 356 #ifdef DEBUG 357 if (ppidebug & PDB_IO) 358 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 359 uio->uio_rw == UIO_READ ? "recv" : "send", 360 ctlr, slave, sc->sc_sec, cp, len, cnt); 361 #endif 362 splx(s); 363 if (uio->uio_rw == UIO_READ) { 364 if (cnt) { 365 error = uiomove(cp, cnt, uio); 366 if (error) 367 break; 368 gotdata++; 369 } 370 /* 371 * Didn't get anything this time, but did in the past. 372 * Consider us done. 373 */ 374 else if (gotdata) 375 break; 376 } 377 s = splsoftclock(); 378 /* 379 * Operation timeout (or non-blocking), quit now. 380 */ 381 if ((sc->sc_flags & PPIF_UIO) == 0) { 382 #ifdef DEBUG 383 if (ppidebug & PDB_IO) 384 printf("ppirw: timeout/done\n"); 385 #endif 386 splx(s); 387 break; 388 } 389 /* 390 * Implement inter-read delay 391 */ 392 if (sc->sc_delay > 0) { 393 sc->sc_flags |= PPIF_DELAY; 394 callout_reset(&sc->sc_start_ch, sc->sc_delay, 395 ppistart, sc); 396 error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); 397 if (error) { 398 splx(s); 399 break; 400 } 401 } 402 splx(s); 403 /* 404 * Must not call uiomove again til we've used all data 405 * that we already grabbed. 406 */ 407 if (uio->uio_rw == UIO_WRITE && cnt != len) { 408 cp += cnt; 409 len -= cnt; 410 cnt = 0; 411 goto again; 412 } 413 } 414 s = splsoftclock(); 415 if (sc->sc_flags & PPIF_TIMO) { 416 callout_stop(&sc->sc_timo_ch); 417 sc->sc_flags &= ~PPIF_TIMO; 418 } 419 if (sc->sc_flags & PPIF_DELAY) { 420 callout_stop(&sc->sc_start_ch); 421 sc->sc_flags &= ~PPIF_DELAY; 422 } 423 splx(s); 424 /* 425 * Adjust for those chars that we uiomove'ed but never wrote 426 */ 427 if (uio->uio_rw == UIO_WRITE && cnt != len) { 428 uio->uio_resid += (len - cnt); 429 #ifdef DEBUG 430 if (ppidebug & PDB_IO) 431 printf("ppirw: short write, adjust by %d\n", 432 len-cnt); 433 #endif 434 } 435 free(buf, M_DEVBUF); 436 #ifdef DEBUG 437 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 438 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 439 #endif 440 return error; 441 } 442 443 static int 444 ppiioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 445 { 446 struct ppi_softc *sc = device_private(ppi_cd.cd_devs[UNIT(dev)]); 447 struct ppiparam *pp, *upp; 448 int error = 0; 449 450 switch (cmd) { 451 case PPIIOCGPARAM: 452 pp = &sc->sc_param; 453 upp = (struct ppiparam *)data; 454 upp->burst = pp->burst; 455 upp->timo = ppihztoms(pp->timo); 456 upp->delay = ppihztoms(pp->delay); 457 break; 458 case PPIIOCSPARAM: 459 pp = &sc->sc_param; 460 upp = (struct ppiparam *)data; 461 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 462 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 463 return EINVAL; 464 pp->burst = upp->burst; 465 pp->timo = ppimstohz(upp->timo); 466 pp->delay = ppimstohz(upp->delay); 467 break; 468 case PPIIOCSSEC: 469 sc->sc_sec = *(int *)data; 470 break; 471 default: 472 return EINVAL; 473 } 474 return error; 475 } 476 477 static int 478 ppihztoms(int h) 479 { 480 extern int hz; 481 int m = h; 482 483 if (m > 0) 484 m = m * 1000 / hz; 485 return m; 486 } 487 488 static int 489 ppimstohz(int m) 490 { 491 extern int hz; 492 int h = m; 493 494 if (h > 0) { 495 h = h * hz / 1000; 496 if (h == 0) 497 h = 1000 / hz; 498 } 499 return h; 500 } 501
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