ppi.c revision 1.44
1 /* $NetBSD: ppi.c,v 1.44 2014/03/16 05:20:24 dholland 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 1.44 2014/03/16 05:20:24 dholland 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 .d_open = ppiopen, 121 .d_close = ppiclose, 122 .d_read = ppiread, 123 .d_write = ppiwrite, 124 .d_ioctl = ppiioctl, 125 .d_stop = nostop, 126 .d_tty = notty, 127 .d_poll = nopoll, 128 .d_mmap = nommap, 129 .d_kqfilter = nokqfilter, 130 .d_flag = 0 131 }; 132 133 static void ppistart(void *); 134 static void ppinoop(void *); 135 136 static void ppitimo(void *); 137 static int ppirw(dev_t, struct uio *); 138 static int ppihztoms(int); 139 static int ppimstohz(int); 140 141 #define UNIT(x) minor(x) 142 143 #ifdef DEBUG 144 int ppidebug = 0x80; 145 #define PDB_FOLLOW 0x01 146 #define PDB_IO 0x02 147 #define PDB_NOCHECK 0x80 148 #endif 149 150 static int 151 ppimatch(device_t parent, cfdata_t cf, void *aux) 152 { 153 struct hpibbus_attach_args *ha = aux; 154 155 /* 156 * The printer/plotter doesn't return an ID tag. 157 * The check below prevents us from matching a CS80 158 * device by mistake. 159 */ 160 if (ha->ha_id & 0x200) 161 return 0; 162 163 /* 164 * To prevent matching all unused slots on the bus, we 165 * don't allow wildcarded locators. 166 */ 167 if (cf->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || 168 cf->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) 169 return 0; 170 171 return 1; 172 } 173 174 static void 175 ppiattach(device_t parent, device_t self, void *aux) 176 { 177 struct ppi_softc *sc = device_private(self); 178 struct hpibbus_attach_args *ha = aux; 179 180 sc->sc_dev = self; 181 aprint_normal("\n"); 182 183 sc->sc_slave = ha->ha_slave; 184 185 callout_init(&sc->sc_timo_ch, 0); 186 callout_init(&sc->sc_start_ch, 0); 187 188 /* Initialize the hpib queue entry. */ 189 sc->sc_hq.hq_softc = sc; 190 sc->sc_hq.hq_slave = sc->sc_slave; 191 sc->sc_hq.hq_start = ppistart; 192 sc->sc_hq.hq_go = ppinoop; 193 sc->sc_hq.hq_intr = ppinoop; 194 195 sc->sc_flags = PPIF_ALIVE; 196 } 197 198 static void 199 ppinoop(void *arg) 200 { 201 /* Noop! */ 202 } 203 204 int 205 ppiopen(dev_t dev, int flags, int fmt, struct lwp *l) 206 { 207 struct ppi_softc *sc; 208 209 sc = device_lookup_private(&ppi_cd,UNIT(dev)); 210 if (sc == NULL) 211 return ENXIO; 212 213 if ((sc->sc_flags & PPIF_ALIVE) == 0) 214 return ENXIO; 215 216 #ifdef DEBUG 217 if (ppidebug & PDB_FOLLOW) 218 printf("ppiopen(%"PRIx64", %x): flags %x\n", 219 dev, flags, sc->sc_flags); 220 #endif 221 if (sc->sc_flags & PPIF_OPEN) 222 return EBUSY; 223 sc->sc_flags |= PPIF_OPEN; 224 sc->sc_burst = PPI_BURST; 225 sc->sc_timo = ppimstohz(PPI_TIMO); 226 sc->sc_delay = ppimstohz(PPI_DELAY); 227 sc->sc_sec = -1; 228 return 0; 229 } 230 231 static int 232 ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) 233 { 234 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 235 236 #ifdef DEBUG 237 if (ppidebug & PDB_FOLLOW) 238 printf("ppiclose(%"PRIx64", %x): flags %x\n", 239 dev, flags, sc->sc_flags); 240 #endif 241 sc->sc_flags &= ~PPIF_OPEN; 242 return 0; 243 } 244 245 static void 246 ppistart(void *arg) 247 { 248 struct ppi_softc *sc = arg; 249 250 #ifdef DEBUG 251 if (ppidebug & PDB_FOLLOW) 252 printf("ppistart(%x)\n", device_unit(sc->sc_dev)); 253 #endif 254 sc->sc_flags &= ~PPIF_DELAY; 255 wakeup(sc); 256 } 257 258 static void 259 ppitimo(void *arg) 260 { 261 struct ppi_softc *sc = arg; 262 263 #ifdef DEBUG 264 if (ppidebug & PDB_FOLLOW) 265 printf("ppitimo(%x)\n", device_unit(sc->sc_dev)); 266 #endif 267 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 268 wakeup(sc); 269 } 270 271 static int 272 ppiread(dev_t dev, struct uio *uio, int flags) 273 { 274 275 #ifdef DEBUG 276 if (ppidebug & PDB_FOLLOW) 277 printf("ppiread(%"PRIx64", %p)\n", dev, uio); 278 #endif 279 return ppirw(dev, uio); 280 } 281 282 static int 283 ppiwrite(dev_t dev, struct uio *uio, int flags) 284 { 285 286 #ifdef DEBUG 287 if (ppidebug & PDB_FOLLOW) 288 printf("ppiwrite(%"PRIx64", %p)\n", dev, uio); 289 #endif 290 return ppirw(dev, uio); 291 } 292 293 static int 294 ppirw(dev_t dev, struct uio *uio) 295 { 296 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 297 int s, s2, len, cnt; 298 char *cp; 299 int error = 0, gotdata = 0; 300 int buflen, ctlr, slave; 301 char *buf; 302 303 if (uio->uio_resid == 0) 304 return 0; 305 306 ctlr = device_unit(device_parent(sc->sc_dev)); 307 slave = sc->sc_slave; 308 309 #ifdef DEBUG 310 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 311 printf("ppirw(%"PRIx64", %p, %c): burst %d, timo %d, resid %x\n", 312 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 313 sc->sc_burst, sc->sc_timo, uio->uio_resid); 314 #endif 315 buflen = min(sc->sc_burst, uio->uio_resid); 316 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 317 sc->sc_flags |= PPIF_UIO; 318 if (sc->sc_timo > 0) { 319 sc->sc_flags |= PPIF_TIMO; 320 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 321 } 322 len = cnt = 0; 323 while (uio->uio_resid > 0) { 324 len = min(buflen, uio->uio_resid); 325 cp = buf; 326 if (uio->uio_rw == UIO_WRITE) { 327 error = uiomove(cp, len, uio); 328 if (error) 329 break; 330 } 331 again: 332 s = splsoftclock(); 333 s2 = splbio(); 334 if ((sc->sc_flags & PPIF_UIO) && 335 hpibreq(device_parent(sc->sc_dev), &sc->sc_hq) == 0) 336 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 337 /* 338 * Check if we timed out during sleep or uiomove 339 */ 340 splx(s2); 341 if ((sc->sc_flags & PPIF_UIO) == 0) { 342 #ifdef DEBUG 343 if (ppidebug & PDB_IO) 344 printf("ppirw: uiomove/sleep timo, flags %x\n", 345 sc->sc_flags); 346 #endif 347 if (sc->sc_flags & PPIF_TIMO) { 348 callout_stop(&sc->sc_timo_ch); 349 sc->sc_flags &= ~PPIF_TIMO; 350 } 351 splx(s); 352 break; 353 } 354 splx(s); 355 /* 356 * Perform the operation 357 */ 358 if (uio->uio_rw == UIO_WRITE) 359 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 360 else 361 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 362 s = splbio(); 363 hpibfree(device_parent(sc->sc_dev), &sc->sc_hq); 364 #ifdef DEBUG 365 if (ppidebug & PDB_IO) 366 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 367 uio->uio_rw == UIO_READ ? "recv" : "send", 368 ctlr, slave, sc->sc_sec, cp, len, cnt); 369 #endif 370 splx(s); 371 if (uio->uio_rw == UIO_READ) { 372 if (cnt) { 373 error = uiomove(cp, cnt, uio); 374 if (error) 375 break; 376 gotdata++; 377 } 378 /* 379 * Didn't get anything this time, but did in the past. 380 * Consider us done. 381 */ 382 else if (gotdata) 383 break; 384 } 385 s = splsoftclock(); 386 /* 387 * Operation timeout (or non-blocking), quit now. 388 */ 389 if ((sc->sc_flags & PPIF_UIO) == 0) { 390 #ifdef DEBUG 391 if (ppidebug & PDB_IO) 392 printf("ppirw: timeout/done\n"); 393 #endif 394 splx(s); 395 break; 396 } 397 /* 398 * Implement inter-read delay 399 */ 400 if (sc->sc_delay > 0) { 401 sc->sc_flags |= PPIF_DELAY; 402 callout_reset(&sc->sc_start_ch, sc->sc_delay, 403 ppistart, sc); 404 error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); 405 if (error) { 406 splx(s); 407 break; 408 } 409 } 410 splx(s); 411 /* 412 * Must not call uiomove again til we've used all data 413 * that we already grabbed. 414 */ 415 if (uio->uio_rw == UIO_WRITE && cnt != len) { 416 cp += cnt; 417 len -= cnt; 418 cnt = 0; 419 goto again; 420 } 421 } 422 s = splsoftclock(); 423 if (sc->sc_flags & PPIF_TIMO) { 424 callout_stop(&sc->sc_timo_ch); 425 sc->sc_flags &= ~PPIF_TIMO; 426 } 427 if (sc->sc_flags & PPIF_DELAY) { 428 callout_stop(&sc->sc_start_ch); 429 sc->sc_flags &= ~PPIF_DELAY; 430 } 431 splx(s); 432 /* 433 * Adjust for those chars that we uiomove'ed but never wrote 434 */ 435 if (uio->uio_rw == UIO_WRITE && cnt != len) { 436 uio->uio_resid += (len - cnt); 437 #ifdef DEBUG 438 if (ppidebug & PDB_IO) 439 printf("ppirw: short write, adjust by %d\n", 440 len-cnt); 441 #endif 442 } 443 free(buf, M_DEVBUF); 444 #ifdef DEBUG 445 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 446 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 447 #endif 448 return error; 449 } 450 451 static int 452 ppiioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 453 { 454 struct ppi_softc *sc = device_lookup_private(&ppi_cd,UNIT(dev)); 455 struct ppiparam *pp, *upp; 456 int error = 0; 457 458 switch (cmd) { 459 case PPIIOCGPARAM: 460 pp = &sc->sc_param; 461 upp = (struct ppiparam *)data; 462 upp->burst = pp->burst; 463 upp->timo = ppihztoms(pp->timo); 464 upp->delay = ppihztoms(pp->delay); 465 break; 466 case PPIIOCSPARAM: 467 pp = &sc->sc_param; 468 upp = (struct ppiparam *)data; 469 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 470 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 471 return EINVAL; 472 pp->burst = upp->burst; 473 pp->timo = ppimstohz(upp->timo); 474 pp->delay = ppimstohz(upp->delay); 475 break; 476 case PPIIOCSSEC: 477 sc->sc_sec = *(int *)data; 478 break; 479 default: 480 return EINVAL; 481 } 482 return error; 483 } 484 485 static int 486 ppihztoms(int h) 487 { 488 extern int hz; 489 int m = h; 490 491 if (m > 0) 492 m = m * 1000 / hz; 493 return m; 494 } 495 496 static int 497 ppimstohz(int m) 498 { 499 extern int hz; 500 int h = m; 501 502 if (h > 0) { 503 h = h * hz / 1000; 504 if (h == 0) 505 h = 1000 / hz; 506 } 507 return h; 508 } 509
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