ppi.c revision 1.41
1 /* $NetBSD: ppi.c,v 1.41 2008/06/13 09:41:15 cegger 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 1.41 2008/06/13 09:41:15 cegger 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 struct ppi_softc *sc; 199 200 sc = device_lookup_private(&ppi_cd,UNIT(dev)); 201 if (sc == NULL) 202 return ENXIO; 203 204 if (sc->sc_flags & PPIF_ALIVE) == 0) 205 return ENXIO; 206 207 #ifdef DEBUG 208 if (ppidebug & PDB_FOLLOW) 209 printf("ppiopen(%x, %x): flags %x\n", 210 dev, flags, sc->sc_flags); 211 #endif 212 if (sc->sc_flags & PPIF_OPEN) 213 return EBUSY; 214 sc->sc_flags |= PPIF_OPEN; 215 sc->sc_burst = PPI_BURST; 216 sc->sc_timo = ppimstohz(PPI_TIMO); 217 sc->sc_delay = ppimstohz(PPI_DELAY); 218 sc->sc_sec = -1; 219 return 0; 220 } 221 222 static int 223 ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) 224 { 225 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 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 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 288 int s, s2, len, cnt; 289 char *cp; 290 int error = 0, gotdata = 0; 291 int buflen, ctlr, slave; 292 char *buf; 293 294 if (uio->uio_resid == 0) 295 return 0; 296 297 ctlr = device_unit(device_parent(sc->sc_dev)); 298 slave = sc->sc_slave; 299 300 #ifdef DEBUG 301 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 302 printf("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 303 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 304 sc->sc_burst, sc->sc_timo, uio->uio_resid); 305 #endif 306 buflen = min(sc->sc_burst, uio->uio_resid); 307 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 308 sc->sc_flags |= PPIF_UIO; 309 if (sc->sc_timo > 0) { 310 sc->sc_flags |= PPIF_TIMO; 311 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 312 } 313 len = cnt = 0; 314 while (uio->uio_resid > 0) { 315 len = min(buflen, uio->uio_resid); 316 cp = buf; 317 if (uio->uio_rw == UIO_WRITE) { 318 error = uiomove(cp, len, uio); 319 if (error) 320 break; 321 } 322 again: 323 s = splsoftclock(); 324 s2 = splbio(); 325 if ((sc->sc_flags & PPIF_UIO) && 326 hpibreq(device_parent(sc->sc_dev), &sc->sc_hq) == 0) 327 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 328 /* 329 * Check if we timed out during sleep or uiomove 330 */ 331 splx(s2); 332 if ((sc->sc_flags & PPIF_UIO) == 0) { 333 #ifdef DEBUG 334 if (ppidebug & PDB_IO) 335 printf("ppirw: uiomove/sleep timo, flags %x\n", 336 sc->sc_flags); 337 #endif 338 if (sc->sc_flags & PPIF_TIMO) { 339 callout_stop(&sc->sc_timo_ch); 340 sc->sc_flags &= ~PPIF_TIMO; 341 } 342 splx(s); 343 break; 344 } 345 splx(s); 346 /* 347 * Perform the operation 348 */ 349 if (uio->uio_rw == UIO_WRITE) 350 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 351 else 352 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 353 s = splbio(); 354 hpibfree(device_parent(sc->sc_dev), &sc->sc_hq); 355 #ifdef DEBUG 356 if (ppidebug & PDB_IO) 357 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 358 uio->uio_rw == UIO_READ ? "recv" : "send", 359 ctlr, slave, sc->sc_sec, cp, len, cnt); 360 #endif 361 splx(s); 362 if (uio->uio_rw == UIO_READ) { 363 if (cnt) { 364 error = uiomove(cp, cnt, uio); 365 if (error) 366 break; 367 gotdata++; 368 } 369 /* 370 * Didn't get anything this time, but did in the past. 371 * Consider us done. 372 */ 373 else if (gotdata) 374 break; 375 } 376 s = splsoftclock(); 377 /* 378 * Operation timeout (or non-blocking), quit now. 379 */ 380 if ((sc->sc_flags & PPIF_UIO) == 0) { 381 #ifdef DEBUG 382 if (ppidebug & PDB_IO) 383 printf("ppirw: timeout/done\n"); 384 #endif 385 splx(s); 386 break; 387 } 388 /* 389 * Implement inter-read delay 390 */ 391 if (sc->sc_delay > 0) { 392 sc->sc_flags |= PPIF_DELAY; 393 callout_reset(&sc->sc_start_ch, sc->sc_delay, 394 ppistart, sc); 395 error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); 396 if (error) { 397 splx(s); 398 break; 399 } 400 } 401 splx(s); 402 /* 403 * Must not call uiomove again til we've used all data 404 * that we already grabbed. 405 */ 406 if (uio->uio_rw == UIO_WRITE && cnt != len) { 407 cp += cnt; 408 len -= cnt; 409 cnt = 0; 410 goto again; 411 } 412 } 413 s = splsoftclock(); 414 if (sc->sc_flags & PPIF_TIMO) { 415 callout_stop(&sc->sc_timo_ch); 416 sc->sc_flags &= ~PPIF_TIMO; 417 } 418 if (sc->sc_flags & PPIF_DELAY) { 419 callout_stop(&sc->sc_start_ch); 420 sc->sc_flags &= ~PPIF_DELAY; 421 } 422 splx(s); 423 /* 424 * Adjust for those chars that we uiomove'ed but never wrote 425 */ 426 if (uio->uio_rw == UIO_WRITE && cnt != len) { 427 uio->uio_resid += (len - cnt); 428 #ifdef DEBUG 429 if (ppidebug & PDB_IO) 430 printf("ppirw: short write, adjust by %d\n", 431 len-cnt); 432 #endif 433 } 434 free(buf, M_DEVBUF); 435 #ifdef DEBUG 436 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 437 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 438 #endif 439 return error; 440 } 441 442 static int 443 ppiioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 444 { 445 struct ppi_softc *sc = device_lookup_private(&ppi_cd,UNIT(dev)); 446 struct ppiparam *pp, *upp; 447 int error = 0; 448 449 switch (cmd) { 450 case PPIIOCGPARAM: 451 pp = &sc->sc_param; 452 upp = (struct ppiparam *)data; 453 upp->burst = pp->burst; 454 upp->timo = ppihztoms(pp->timo); 455 upp->delay = ppihztoms(pp->delay); 456 break; 457 case PPIIOCSPARAM: 458 pp = &sc->sc_param; 459 upp = (struct ppiparam *)data; 460 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 461 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 462 return EINVAL; 463 pp->burst = upp->burst; 464 pp->timo = ppimstohz(upp->timo); 465 pp->delay = ppimstohz(upp->delay); 466 break; 467 case PPIIOCSSEC: 468 sc->sc_sec = *(int *)data; 469 break; 470 default: 471 return EINVAL; 472 } 473 return error; 474 } 475 476 static int 477 ppihztoms(int h) 478 { 479 extern int hz; 480 int m = h; 481 482 if (m > 0) 483 m = m * 1000 / hz; 484 return m; 485 } 486 487 static int 488 ppimstohz(int m) 489 { 490 extern int hz; 491 int h = m; 492 493 if (h > 0) { 494 h = h * hz / 1000; 495 if (h == 0) 496 h = 1000 / hz; 497 } 498 return h; 499 } 500
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