ppi.c revision 1.45
1 /* $NetBSD: ppi.c,v 1.45 2014/07/25 08:10:33 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 1.45 2014/07/25 08:10:33 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_discard = nodiscard, 131 .d_flag = 0 132 }; 133 134 static void ppistart(void *); 135 static void ppinoop(void *); 136 137 static void ppitimo(void *); 138 static int ppirw(dev_t, struct uio *); 139 static int ppihztoms(int); 140 static int ppimstohz(int); 141 142 #define UNIT(x) minor(x) 143 144 #ifdef DEBUG 145 int ppidebug = 0x80; 146 #define PDB_FOLLOW 0x01 147 #define PDB_IO 0x02 148 #define PDB_NOCHECK 0x80 149 #endif 150 151 static int 152 ppimatch(device_t parent, cfdata_t cf, void *aux) 153 { 154 struct hpibbus_attach_args *ha = aux; 155 156 /* 157 * The printer/plotter doesn't return an ID tag. 158 * The check below prevents us from matching a CS80 159 * device by mistake. 160 */ 161 if (ha->ha_id & 0x200) 162 return 0; 163 164 /* 165 * To prevent matching all unused slots on the bus, we 166 * don't allow wildcarded locators. 167 */ 168 if (cf->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || 169 cf->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) 170 return 0; 171 172 return 1; 173 } 174 175 static void 176 ppiattach(device_t parent, device_t self, void *aux) 177 { 178 struct ppi_softc *sc = device_private(self); 179 struct hpibbus_attach_args *ha = aux; 180 181 sc->sc_dev = self; 182 aprint_normal("\n"); 183 184 sc->sc_slave = ha->ha_slave; 185 186 callout_init(&sc->sc_timo_ch, 0); 187 callout_init(&sc->sc_start_ch, 0); 188 189 /* Initialize the hpib queue entry. */ 190 sc->sc_hq.hq_softc = sc; 191 sc->sc_hq.hq_slave = sc->sc_slave; 192 sc->sc_hq.hq_start = ppistart; 193 sc->sc_hq.hq_go = ppinoop; 194 sc->sc_hq.hq_intr = ppinoop; 195 196 sc->sc_flags = PPIF_ALIVE; 197 } 198 199 static void 200 ppinoop(void *arg) 201 { 202 /* Noop! */ 203 } 204 205 int 206 ppiopen(dev_t dev, int flags, int fmt, struct lwp *l) 207 { 208 struct ppi_softc *sc; 209 210 sc = device_lookup_private(&ppi_cd,UNIT(dev)); 211 if (sc == NULL) 212 return ENXIO; 213 214 if ((sc->sc_flags & PPIF_ALIVE) == 0) 215 return ENXIO; 216 217 #ifdef DEBUG 218 if (ppidebug & PDB_FOLLOW) 219 printf("ppiopen(%"PRIx64", %x): flags %x\n", 220 dev, flags, sc->sc_flags); 221 #endif 222 if (sc->sc_flags & PPIF_OPEN) 223 return EBUSY; 224 sc->sc_flags |= PPIF_OPEN; 225 sc->sc_burst = PPI_BURST; 226 sc->sc_timo = ppimstohz(PPI_TIMO); 227 sc->sc_delay = ppimstohz(PPI_DELAY); 228 sc->sc_sec = -1; 229 return 0; 230 } 231 232 static int 233 ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) 234 { 235 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 236 237 #ifdef DEBUG 238 if (ppidebug & PDB_FOLLOW) 239 printf("ppiclose(%"PRIx64", %x): flags %x\n", 240 dev, flags, sc->sc_flags); 241 #endif 242 sc->sc_flags &= ~PPIF_OPEN; 243 return 0; 244 } 245 246 static void 247 ppistart(void *arg) 248 { 249 struct ppi_softc *sc = arg; 250 251 #ifdef DEBUG 252 if (ppidebug & PDB_FOLLOW) 253 printf("ppistart(%x)\n", device_unit(sc->sc_dev)); 254 #endif 255 sc->sc_flags &= ~PPIF_DELAY; 256 wakeup(sc); 257 } 258 259 static void 260 ppitimo(void *arg) 261 { 262 struct ppi_softc *sc = arg; 263 264 #ifdef DEBUG 265 if (ppidebug & PDB_FOLLOW) 266 printf("ppitimo(%x)\n", device_unit(sc->sc_dev)); 267 #endif 268 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 269 wakeup(sc); 270 } 271 272 static int 273 ppiread(dev_t dev, struct uio *uio, int flags) 274 { 275 276 #ifdef DEBUG 277 if (ppidebug & PDB_FOLLOW) 278 printf("ppiread(%"PRIx64", %p)\n", dev, uio); 279 #endif 280 return ppirw(dev, uio); 281 } 282 283 static int 284 ppiwrite(dev_t dev, struct uio *uio, int flags) 285 { 286 287 #ifdef DEBUG 288 if (ppidebug & PDB_FOLLOW) 289 printf("ppiwrite(%"PRIx64", %p)\n", dev, uio); 290 #endif 291 return ppirw(dev, uio); 292 } 293 294 static int 295 ppirw(dev_t dev, struct uio *uio) 296 { 297 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 298 int s, s2, len, cnt; 299 char *cp; 300 int error = 0, gotdata = 0; 301 int buflen, ctlr, slave; 302 char *buf; 303 304 if (uio->uio_resid == 0) 305 return 0; 306 307 ctlr = device_unit(device_parent(sc->sc_dev)); 308 slave = sc->sc_slave; 309 310 #ifdef DEBUG 311 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 312 printf("ppirw(%"PRIx64", %p, %c): burst %d, timo %d, resid %x\n", 313 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 314 sc->sc_burst, sc->sc_timo, uio->uio_resid); 315 #endif 316 buflen = min(sc->sc_burst, uio->uio_resid); 317 buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK); 318 sc->sc_flags |= PPIF_UIO; 319 if (sc->sc_timo > 0) { 320 sc->sc_flags |= PPIF_TIMO; 321 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 322 } 323 len = cnt = 0; 324 while (uio->uio_resid > 0) { 325 len = min(buflen, uio->uio_resid); 326 cp = buf; 327 if (uio->uio_rw == UIO_WRITE) { 328 error = uiomove(cp, len, uio); 329 if (error) 330 break; 331 } 332 again: 333 s = splsoftclock(); 334 s2 = splbio(); 335 if ((sc->sc_flags & PPIF_UIO) && 336 hpibreq(device_parent(sc->sc_dev), &sc->sc_hq) == 0) 337 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 338 /* 339 * Check if we timed out during sleep or uiomove 340 */ 341 splx(s2); 342 if ((sc->sc_flags & PPIF_UIO) == 0) { 343 #ifdef DEBUG 344 if (ppidebug & PDB_IO) 345 printf("ppirw: uiomove/sleep timo, flags %x\n", 346 sc->sc_flags); 347 #endif 348 if (sc->sc_flags & PPIF_TIMO) { 349 callout_stop(&sc->sc_timo_ch); 350 sc->sc_flags &= ~PPIF_TIMO; 351 } 352 splx(s); 353 break; 354 } 355 splx(s); 356 /* 357 * Perform the operation 358 */ 359 if (uio->uio_rw == UIO_WRITE) 360 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 361 else 362 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 363 s = splbio(); 364 hpibfree(device_parent(sc->sc_dev), &sc->sc_hq); 365 #ifdef DEBUG 366 if (ppidebug & PDB_IO) 367 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 368 uio->uio_rw == UIO_READ ? "recv" : "send", 369 ctlr, slave, sc->sc_sec, cp, len, cnt); 370 #endif 371 splx(s); 372 if (uio->uio_rw == UIO_READ) { 373 if (cnt) { 374 error = uiomove(cp, cnt, uio); 375 if (error) 376 break; 377 gotdata++; 378 } 379 /* 380 * Didn't get anything this time, but did in the past. 381 * Consider us done. 382 */ 383 else if (gotdata) 384 break; 385 } 386 s = splsoftclock(); 387 /* 388 * Operation timeout (or non-blocking), quit now. 389 */ 390 if ((sc->sc_flags & PPIF_UIO) == 0) { 391 #ifdef DEBUG 392 if (ppidebug & PDB_IO) 393 printf("ppirw: timeout/done\n"); 394 #endif 395 splx(s); 396 break; 397 } 398 /* 399 * Implement inter-read delay 400 */ 401 if (sc->sc_delay > 0) { 402 sc->sc_flags |= PPIF_DELAY; 403 callout_reset(&sc->sc_start_ch, sc->sc_delay, 404 ppistart, sc); 405 error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); 406 if (error) { 407 splx(s); 408 break; 409 } 410 } 411 splx(s); 412 /* 413 * Must not call uiomove again til we've used all data 414 * that we already grabbed. 415 */ 416 if (uio->uio_rw == UIO_WRITE && cnt != len) { 417 cp += cnt; 418 len -= cnt; 419 cnt = 0; 420 goto again; 421 } 422 } 423 s = splsoftclock(); 424 if (sc->sc_flags & PPIF_TIMO) { 425 callout_stop(&sc->sc_timo_ch); 426 sc->sc_flags &= ~PPIF_TIMO; 427 } 428 if (sc->sc_flags & PPIF_DELAY) { 429 callout_stop(&sc->sc_start_ch); 430 sc->sc_flags &= ~PPIF_DELAY; 431 } 432 splx(s); 433 /* 434 * Adjust for those chars that we uiomove'ed but never wrote 435 */ 436 if (uio->uio_rw == UIO_WRITE && cnt != len) { 437 uio->uio_resid += (len - cnt); 438 #ifdef DEBUG 439 if (ppidebug & PDB_IO) 440 printf("ppirw: short write, adjust by %d\n", 441 len-cnt); 442 #endif 443 } 444 free(buf, M_DEVBUF); 445 #ifdef DEBUG 446 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 447 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 448 #endif 449 return error; 450 } 451 452 static int 453 ppiioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 454 { 455 struct ppi_softc *sc = device_lookup_private(&ppi_cd,UNIT(dev)); 456 struct ppiparam *pp, *upp; 457 int error = 0; 458 459 switch (cmd) { 460 case PPIIOCGPARAM: 461 pp = &sc->sc_param; 462 upp = (struct ppiparam *)data; 463 upp->burst = pp->burst; 464 upp->timo = ppihztoms(pp->timo); 465 upp->delay = ppihztoms(pp->delay); 466 break; 467 case PPIIOCSPARAM: 468 pp = &sc->sc_param; 469 upp = (struct ppiparam *)data; 470 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 471 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 472 return EINVAL; 473 pp->burst = upp->burst; 474 pp->timo = ppimstohz(upp->timo); 475 pp->delay = ppimstohz(upp->delay); 476 break; 477 case PPIIOCSSEC: 478 sc->sc_sec = *(int *)data; 479 break; 480 default: 481 return EINVAL; 482 } 483 return error; 484 } 485 486 static int 487 ppihztoms(int h) 488 { 489 extern int hz; 490 int m = h; 491 492 if (m > 0) 493 m = m * 1000 / hz; 494 return m; 495 } 496 497 static int 498 ppimstohz(int m) 499 { 500 extern int hz; 501 int h = m; 502 503 if (h > 0) { 504 h = h * hz / 1000; 505 if (h == 0) 506 h = 1000 / hz; 507 } 508 return h; 509 } 510
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