ppi.c revision 1.39
1 /* $NetBSD: ppi.c,v 1.39 2008/03/29 06:47:08 tsutsui 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 1.39 2008/03/29 06:47:08 tsutsui 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 device_t 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(device_t, cfdata_t, void *); 115 static void ppiattach(device_t, device_t, void *); 116 117 CFATTACH_DECL_NEW(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(device_t parent, cfdata_t cf, 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 (cf->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || 166 cf->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) 167 return 0; 168 169 return 1; 170 } 171 172 static void 173 ppiattach(device_t parent, device_t self, void *aux) 174 { 175 struct ppi_softc *sc = device_private(self); 176 struct hpibbus_attach_args *ha = aux; 177 178 sc->sc_dev = self; 179 aprint_normal("\n"); 180 181 sc->sc_slave = ha->ha_slave; 182 183 callout_init(&sc->sc_timo_ch, 0); 184 callout_init(&sc->sc_start_ch, 0); 185 186 /* Initialize the hpib queue entry. */ 187 sc->sc_hq.hq_softc = sc; 188 sc->sc_hq.hq_slave = sc->sc_slave; 189 sc->sc_hq.hq_start = ppistart; 190 sc->sc_hq.hq_go = ppinoop; 191 sc->sc_hq.hq_intr = ppinoop; 192 193 sc->sc_flags = PPIF_ALIVE; 194 } 195 196 static void 197 ppinoop(void *arg) 198 { 199 /* Noop! */ 200 } 201 202 int 203 ppiopen(dev_t dev, int flags, int fmt, struct lwp *l) 204 { 205 int unit = UNIT(dev); 206 struct ppi_softc *sc; 207 208 if (unit >= ppi_cd.cd_ndevs || 209 (sc = device_private(ppi_cd.cd_devs[unit])) == NULL || 210 (sc->sc_flags & PPIF_ALIVE) == 0) 211 return ENXIO; 212 213 #ifdef DEBUG 214 if (ppidebug & PDB_FOLLOW) 215 printf("ppiopen(%x, %x): flags %x\n", 216 dev, flags, sc->sc_flags); 217 #endif 218 if (sc->sc_flags & PPIF_OPEN) 219 return EBUSY; 220 sc->sc_flags |= PPIF_OPEN; 221 sc->sc_burst = PPI_BURST; 222 sc->sc_timo = ppimstohz(PPI_TIMO); 223 sc->sc_delay = ppimstohz(PPI_DELAY); 224 sc->sc_sec = -1; 225 return 0; 226 } 227 228 static int 229 ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) 230 { 231 int unit = UNIT(dev); 232 struct ppi_softc *sc = device_private(ppi_cd.cd_devs[unit]); 233 234 #ifdef DEBUG 235 if (ppidebug & PDB_FOLLOW) 236 printf("ppiclose(%x, %x): flags %x\n", 237 dev, flags, sc->sc_flags); 238 #endif 239 sc->sc_flags &= ~PPIF_OPEN; 240 return 0; 241 } 242 243 static void 244 ppistart(void *arg) 245 { 246 struct ppi_softc *sc = arg; 247 248 #ifdef DEBUG 249 if (ppidebug & PDB_FOLLOW) 250 printf("ppistart(%x)\n", device_unit(sc->sc_dev)); 251 #endif 252 sc->sc_flags &= ~PPIF_DELAY; 253 wakeup(sc); 254 } 255 256 static void 257 ppitimo(void *arg) 258 { 259 struct ppi_softc *sc = arg; 260 261 #ifdef DEBUG 262 if (ppidebug & PDB_FOLLOW) 263 printf("ppitimo(%x)\n", device_unit(sc->sc_dev)); 264 #endif 265 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 266 wakeup(sc); 267 } 268 269 static int 270 ppiread(dev_t dev, struct uio *uio, int flags) 271 { 272 273 #ifdef DEBUG 274 if (ppidebug & PDB_FOLLOW) 275 printf("ppiread(%x, %p)\n", dev, uio); 276 #endif 277 return ppirw(dev, uio); 278 } 279 280 static int 281 ppiwrite(dev_t dev, struct uio *uio, int flags) 282 { 283 284 #ifdef DEBUG 285 if (ppidebug & PDB_FOLLOW) 286 printf("ppiwrite(%x, %p)\n", dev, uio); 287 #endif 288 return ppirw(dev, uio); 289 } 290 291 static int 292 ppirw(dev_t dev, struct uio *uio) 293 { 294 int unit = UNIT(dev); 295 struct ppi_softc *sc = device_private(ppi_cd.cd_devs[unit]); 296 int s, s2, len, cnt; 297 char *cp; 298 int error = 0, gotdata = 0; 299 int buflen, ctlr, slave; 300 char *buf; 301 302 if (uio->uio_resid == 0) 303 return 0; 304 305 ctlr = device_unit(device_parent(sc->sc_dev)); 306 slave = sc->sc_slave; 307 308 #ifdef DEBUG 309 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 310 printf("ppirw(%x, %p, %c): burst %d, timo %d, resid %x\n", 311 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 312 sc->sc_burst, sc->sc_timo, uio->uio_resid); 313 #endif 314 buflen = min(sc->sc_burst, uio->uio_resid); 315 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 316 sc->sc_flags |= PPIF_UIO; 317 if (sc->sc_timo > 0) { 318 sc->sc_flags |= PPIF_TIMO; 319 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 320 } 321 len = cnt = 0; 322 while (uio->uio_resid > 0) { 323 len = min(buflen, uio->uio_resid); 324 cp = buf; 325 if (uio->uio_rw == UIO_WRITE) { 326 error = uiomove(cp, len, uio); 327 if (error) 328 break; 329 } 330 again: 331 s = splsoftclock(); 332 s2 = splbio(); 333 if ((sc->sc_flags & PPIF_UIO) && 334 hpibreq(device_parent(sc->sc_dev), &sc->sc_hq) == 0) 335 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 336 /* 337 * Check if we timed out during sleep or uiomove 338 */ 339 splx(s2); 340 if ((sc->sc_flags & PPIF_UIO) == 0) { 341 #ifdef DEBUG 342 if (ppidebug & PDB_IO) 343 printf("ppirw: uiomove/sleep timo, flags %x\n", 344 sc->sc_flags); 345 #endif 346 if (sc->sc_flags & PPIF_TIMO) { 347 callout_stop(&sc->sc_timo_ch); 348 sc->sc_flags &= ~PPIF_TIMO; 349 } 350 splx(s); 351 break; 352 } 353 splx(s); 354 /* 355 * Perform the operation 356 */ 357 if (uio->uio_rw == UIO_WRITE) 358 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 359 else 360 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 361 s = splbio(); 362 hpibfree(device_parent(sc->sc_dev), &sc->sc_hq); 363 #ifdef DEBUG 364 if (ppidebug & PDB_IO) 365 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 366 uio->uio_rw == UIO_READ ? "recv" : "send", 367 ctlr, slave, sc->sc_sec, cp, len, cnt); 368 #endif 369 splx(s); 370 if (uio->uio_rw == UIO_READ) { 371 if (cnt) { 372 error = uiomove(cp, cnt, uio); 373 if (error) 374 break; 375 gotdata++; 376 } 377 /* 378 * Didn't get anything this time, but did in the past. 379 * Consider us done. 380 */ 381 else if (gotdata) 382 break; 383 } 384 s = splsoftclock(); 385 /* 386 * Operation timeout (or non-blocking), quit now. 387 */ 388 if ((sc->sc_flags & PPIF_UIO) == 0) { 389 #ifdef DEBUG 390 if (ppidebug & PDB_IO) 391 printf("ppirw: timeout/done\n"); 392 #endif 393 splx(s); 394 break; 395 } 396 /* 397 * Implement inter-read delay 398 */ 399 if (sc->sc_delay > 0) { 400 sc->sc_flags |= PPIF_DELAY; 401 callout_reset(&sc->sc_start_ch, sc->sc_delay, 402 ppistart, sc); 403 error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); 404 if (error) { 405 splx(s); 406 break; 407 } 408 } 409 splx(s); 410 /* 411 * Must not call uiomove again til we've used all data 412 * that we already grabbed. 413 */ 414 if (uio->uio_rw == UIO_WRITE && cnt != len) { 415 cp += cnt; 416 len -= cnt; 417 cnt = 0; 418 goto again; 419 } 420 } 421 s = splsoftclock(); 422 if (sc->sc_flags & PPIF_TIMO) { 423 callout_stop(&sc->sc_timo_ch); 424 sc->sc_flags &= ~PPIF_TIMO; 425 } 426 if (sc->sc_flags & PPIF_DELAY) { 427 callout_stop(&sc->sc_start_ch); 428 sc->sc_flags &= ~PPIF_DELAY; 429 } 430 splx(s); 431 /* 432 * Adjust for those chars that we uiomove'ed but never wrote 433 */ 434 if (uio->uio_rw == UIO_WRITE && cnt != len) { 435 uio->uio_resid += (len - cnt); 436 #ifdef DEBUG 437 if (ppidebug & PDB_IO) 438 printf("ppirw: short write, adjust by %d\n", 439 len-cnt); 440 #endif 441 } 442 free(buf, M_DEVBUF); 443 #ifdef DEBUG 444 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 445 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 446 #endif 447 return error; 448 } 449 450 static int 451 ppiioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 452 { 453 struct ppi_softc *sc = device_private(ppi_cd.cd_devs[UNIT(dev)]); 454 struct ppiparam *pp, *upp; 455 int error = 0; 456 457 switch (cmd) { 458 case PPIIOCGPARAM: 459 pp = &sc->sc_param; 460 upp = (struct ppiparam *)data; 461 upp->burst = pp->burst; 462 upp->timo = ppihztoms(pp->timo); 463 upp->delay = ppihztoms(pp->delay); 464 break; 465 case PPIIOCSPARAM: 466 pp = &sc->sc_param; 467 upp = (struct ppiparam *)data; 468 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 469 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 470 return EINVAL; 471 pp->burst = upp->burst; 472 pp->timo = ppimstohz(upp->timo); 473 pp->delay = ppimstohz(upp->delay); 474 break; 475 case PPIIOCSSEC: 476 sc->sc_sec = *(int *)data; 477 break; 478 default: 479 return EINVAL; 480 } 481 return error; 482 } 483 484 static int 485 ppihztoms(int h) 486 { 487 extern int hz; 488 int m = h; 489 490 if (m > 0) 491 m = m * 1000 / hz; 492 return m; 493 } 494 495 static int 496 ppimstohz(int m) 497 { 498 extern int hz; 499 int h = m; 500 501 if (h > 0) { 502 h = h * hz / 1000; 503 if (h == 0) 504 h = 1000 / hz; 505 } 506 return h; 507 } 508
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