1 /* $NetBSD: ppi.c,v 1.48 2020/11/18 02:22:16 thorpej 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 1.48 2020/11/18 02:22:16 thorpej Exp $"); 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/kernel.h> 73 #include <sys/callout.h> 74 #include <sys/conf.h> 75 #include <sys/device.h> 76 #include <sys/errno.h> 77 #include <sys/kmem.h> 78 #include <sys/proc.h> 79 #include <sys/uio.h> 80 81 #include <hp300/dev/hpibvar.h> 82 83 #include <hp300/dev/ppiioctl.h> 84 85 #include "ioconf.h" 86 87 struct ppi_softc { 88 device_t sc_dev; 89 int sc_flags; 90 struct hpibqueue sc_hq; /* HP-IB job queue entry */ 91 struct ppiparam sc_param; 92 #define sc_burst sc_param.burst 93 #define sc_timo sc_param.timo 94 #define sc_delay sc_param.delay 95 int sc_sec; 96 int sc_slave; /* HP-IB slave address */ 97 struct callout sc_timo_ch; 98 struct callout sc_start_ch; 99 }; 100 101 /* sc_flags values */ 102 #define PPIF_ALIVE 0x01 103 #define PPIF_OPEN 0x02 104 #define PPIF_UIO 0x04 105 #define PPIF_TIMO 0x08 106 #define PPIF_DELAY 0x10 107 108 static int ppimatch(device_t, cfdata_t, void *); 109 static void ppiattach(device_t, device_t, void *); 110 111 CFATTACH_DECL_NEW(ppi, sizeof(struct ppi_softc), 112 ppimatch, ppiattach, NULL, NULL); 113 114 static dev_type_open(ppiopen); 115 static dev_type_close(ppiclose); 116 static dev_type_read(ppiread); 117 static dev_type_write(ppiwrite); 118 static dev_type_ioctl(ppiioctl); 119 120 const struct cdevsw ppi_cdevsw = { 121 .d_open = ppiopen, 122 .d_close = ppiclose, 123 .d_read = ppiread, 124 .d_write = ppiwrite, 125 .d_ioctl = ppiioctl, 126 .d_stop = nostop, 127 .d_tty = notty, 128 .d_poll = nopoll, 129 .d_mmap = nommap, 130 .d_kqfilter = nokqfilter, 131 .d_discard = nodiscard, 132 .d_flag = 0 133 }; 134 135 static void ppistart(void *); 136 static void ppinoop(void *); 137 138 static void ppitimo(void *); 139 static int ppirw(dev_t, struct uio *); 140 static int ppihztoms(int); 141 static int ppimstohz(int); 142 143 #define UNIT(x) minor(x) 144 145 #ifdef DEBUG 146 int ppidebug = 0x80; 147 #define PDB_FOLLOW 0x01 148 #define PDB_IO 0x02 149 #define PDB_NOCHECK 0x80 150 #endif 151 152 static int 153 ppimatch(device_t parent, cfdata_t cf, void *aux) 154 { 155 struct hpibbus_attach_args *ha = aux; 156 157 /* 158 * The printer/plotter doesn't return an ID tag. 159 * The check below prevents us from matching a CS80 160 * device by mistake. 161 */ 162 if (ha->ha_id & 0x200) 163 return 0; 164 165 /* 166 * To prevent matching all unused slots on the bus, we 167 * don't allow wildcarded locators. 168 */ 169 if (cf->hpibbuscf_slave == HPIBBUSCF_SLAVE_DEFAULT || 170 cf->hpibbuscf_punit == HPIBBUSCF_PUNIT_DEFAULT) 171 return 0; 172 173 return 1; 174 } 175 176 static void 177 ppiattach(device_t parent, device_t self, void *aux) 178 { 179 struct ppi_softc *sc = device_private(self); 180 struct hpibbus_attach_args *ha = aux; 181 182 sc->sc_dev = self; 183 aprint_normal("\n"); 184 185 sc->sc_slave = ha->ha_slave; 186 187 callout_init(&sc->sc_timo_ch, 0); 188 callout_init(&sc->sc_start_ch, 0); 189 190 /* Initialize the hpib queue entry. */ 191 sc->sc_hq.hq_softc = sc; 192 sc->sc_hq.hq_slave = sc->sc_slave; 193 sc->sc_hq.hq_start = ppistart; 194 sc->sc_hq.hq_go = ppinoop; 195 sc->sc_hq.hq_intr = ppinoop; 196 197 sc->sc_flags = PPIF_ALIVE; 198 } 199 200 static void 201 ppinoop(void *arg) 202 { 203 /* Noop! */ 204 } 205 206 int 207 ppiopen(dev_t dev, int flags, int fmt, struct lwp *l) 208 { 209 struct ppi_softc *sc; 210 211 sc = device_lookup_private(&ppi_cd,UNIT(dev)); 212 if (sc == NULL) 213 return ENXIO; 214 215 if ((sc->sc_flags & PPIF_ALIVE) == 0) 216 return ENXIO; 217 218 #ifdef DEBUG 219 if (ppidebug & PDB_FOLLOW) 220 printf("ppiopen(%"PRIx64", %x): flags %x\n", 221 dev, flags, sc->sc_flags); 222 #endif 223 if (sc->sc_flags & PPIF_OPEN) 224 return EBUSY; 225 sc->sc_flags |= PPIF_OPEN; 226 sc->sc_burst = PPI_BURST; 227 sc->sc_timo = ppimstohz(PPI_TIMO); 228 sc->sc_delay = ppimstohz(PPI_DELAY); 229 sc->sc_sec = -1; 230 return 0; 231 } 232 233 static int 234 ppiclose(dev_t dev, int flags, int fmt, struct lwp *l) 235 { 236 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 237 238 #ifdef DEBUG 239 if (ppidebug & PDB_FOLLOW) 240 printf("ppiclose(%"PRIx64", %x): flags %x\n", 241 dev, flags, sc->sc_flags); 242 #endif 243 sc->sc_flags &= ~PPIF_OPEN; 244 return 0; 245 } 246 247 static void 248 ppistart(void *arg) 249 { 250 struct ppi_softc *sc = arg; 251 252 #ifdef DEBUG 253 if (ppidebug & PDB_FOLLOW) 254 printf("ppistart(%x)\n", device_unit(sc->sc_dev)); 255 #endif 256 sc->sc_flags &= ~PPIF_DELAY; 257 wakeup(sc); 258 } 259 260 static void 261 ppitimo(void *arg) 262 { 263 struct ppi_softc *sc = arg; 264 265 #ifdef DEBUG 266 if (ppidebug & PDB_FOLLOW) 267 printf("ppitimo(%x)\n", device_unit(sc->sc_dev)); 268 #endif 269 sc->sc_flags &= ~(PPIF_UIO|PPIF_TIMO); 270 wakeup(sc); 271 } 272 273 static int 274 ppiread(dev_t dev, struct uio *uio, int flags) 275 { 276 277 #ifdef DEBUG 278 if (ppidebug & PDB_FOLLOW) 279 printf("ppiread(%"PRIx64", %p)\n", dev, uio); 280 #endif 281 return ppirw(dev, uio); 282 } 283 284 static int 285 ppiwrite(dev_t dev, struct uio *uio, int flags) 286 { 287 288 #ifdef DEBUG 289 if (ppidebug & PDB_FOLLOW) 290 printf("ppiwrite(%"PRIx64", %p)\n", dev, uio); 291 #endif 292 return ppirw(dev, uio); 293 } 294 295 static int 296 ppirw(dev_t dev, struct uio *uio) 297 { 298 struct ppi_softc *sc = device_lookup_private(&ppi_cd, UNIT(dev)); 299 int s, s2, len, cnt; 300 char *cp; 301 int error = 0, gotdata = 0; 302 int ctlr, slave; 303 char *buf; 304 305 if (uio->uio_resid == 0) 306 return 0; 307 308 ctlr = device_unit(device_parent(sc->sc_dev)); 309 slave = sc->sc_slave; 310 311 #ifdef DEBUG 312 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 313 printf("ppirw(%"PRIx64", %p, %c): burst %d, timo %d, resid %x\n", 314 dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W', 315 sc->sc_burst, sc->sc_timo, uio->uio_resid); 316 #endif 317 const int buflen = uimin(sc->sc_burst, uio->uio_resid); 318 buf = kmem_alloc(buflen, KM_SLEEP); 319 sc->sc_flags |= PPIF_UIO; 320 if (sc->sc_timo > 0) { 321 sc->sc_flags |= PPIF_TIMO; 322 callout_reset(&sc->sc_timo_ch, sc->sc_timo, ppitimo, sc); 323 } 324 len = cnt = 0; 325 while (uio->uio_resid > 0) { 326 len = uimin(buflen, uio->uio_resid); 327 cp = buf; 328 if (uio->uio_rw == UIO_WRITE) { 329 error = uiomove(cp, len, uio); 330 if (error) 331 break; 332 } 333 again: 334 s = splsoftclock(); 335 s2 = splbio(); 336 if ((sc->sc_flags & PPIF_UIO) && 337 hpibreq(device_parent(sc->sc_dev), &sc->sc_hq) == 0) 338 (void) tsleep(sc, PRIBIO + 1, "ppirw", 0); 339 /* 340 * Check if we timed out during sleep or uiomove 341 */ 342 splx(s2); 343 if ((sc->sc_flags & PPIF_UIO) == 0) { 344 #ifdef DEBUG 345 if (ppidebug & PDB_IO) 346 printf("ppirw: uiomove/sleep timo, flags %x\n", 347 sc->sc_flags); 348 #endif 349 if (sc->sc_flags & PPIF_TIMO) { 350 callout_stop(&sc->sc_timo_ch); 351 sc->sc_flags &= ~PPIF_TIMO; 352 } 353 splx(s); 354 break; 355 } 356 splx(s); 357 /* 358 * Perform the operation 359 */ 360 if (uio->uio_rw == UIO_WRITE) 361 cnt = hpibsend(ctlr, slave, sc->sc_sec, cp, len); 362 else 363 cnt = hpibrecv(ctlr, slave, sc->sc_sec, cp, len); 364 s = splbio(); 365 hpibfree(device_parent(sc->sc_dev), &sc->sc_hq); 366 #ifdef DEBUG 367 if (ppidebug & PDB_IO) 368 printf("ppirw: %s(%d, %d, %x, %p, %d) -> %d\n", 369 uio->uio_rw == UIO_READ ? "recv" : "send", 370 ctlr, slave, sc->sc_sec, cp, len, cnt); 371 #endif 372 splx(s); 373 if (uio->uio_rw == UIO_READ) { 374 if (cnt) { 375 error = uiomove(cp, cnt, uio); 376 if (error) 377 break; 378 gotdata++; 379 } 380 /* 381 * Didn't get anything this time, but did in the past. 382 * Consider us done. 383 */ 384 else if (gotdata) 385 break; 386 } 387 s = splsoftclock(); 388 /* 389 * Operation timeout (or non-blocking), quit now. 390 */ 391 if ((sc->sc_flags & PPIF_UIO) == 0) { 392 #ifdef DEBUG 393 if (ppidebug & PDB_IO) 394 printf("ppirw: timeout/done\n"); 395 #endif 396 splx(s); 397 break; 398 } 399 /* 400 * Implement inter-read delay 401 */ 402 if (sc->sc_delay > 0) { 403 sc->sc_flags |= PPIF_DELAY; 404 callout_reset(&sc->sc_start_ch, sc->sc_delay, 405 ppistart, sc); 406 error = tsleep(sc, (PCATCH|PZERO) + 1, "hpib", 0); 407 if (error) { 408 splx(s); 409 break; 410 } 411 } 412 splx(s); 413 /* 414 * Must not call uiomove again til we've used all data 415 * that we already grabbed. 416 */ 417 if (uio->uio_rw == UIO_WRITE && cnt != len) { 418 cp += cnt; 419 len -= cnt; 420 cnt = 0; 421 goto again; 422 } 423 } 424 s = splsoftclock(); 425 if (sc->sc_flags & PPIF_TIMO) { 426 callout_stop(&sc->sc_timo_ch); 427 sc->sc_flags &= ~PPIF_TIMO; 428 } 429 if (sc->sc_flags & PPIF_DELAY) { 430 callout_stop(&sc->sc_start_ch); 431 sc->sc_flags &= ~PPIF_DELAY; 432 } 433 splx(s); 434 /* 435 * Adjust for those chars that we uiomove'ed but never wrote 436 */ 437 if (uio->uio_rw == UIO_WRITE && cnt != len) { 438 uio->uio_resid += (len - cnt); 439 #ifdef DEBUG 440 if (ppidebug & PDB_IO) 441 printf("ppirw: short write, adjust by %d\n", 442 len-cnt); 443 #endif 444 } 445 kmem_free(buf, buflen); 446 #ifdef DEBUG 447 if (ppidebug & (PDB_FOLLOW|PDB_IO)) 448 printf("ppirw: return %d, resid %d\n", error, uio->uio_resid); 449 #endif 450 return error; 451 } 452 453 static int 454 ppiioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 455 { 456 struct ppi_softc *sc = device_lookup_private(&ppi_cd,UNIT(dev)); 457 struct ppiparam *pp, *upp; 458 int error = 0; 459 460 switch (cmd) { 461 case PPIIOCGPARAM: 462 pp = &sc->sc_param; 463 upp = (struct ppiparam *)data; 464 upp->burst = pp->burst; 465 upp->timo = ppihztoms(pp->timo); 466 upp->delay = ppihztoms(pp->delay); 467 break; 468 case PPIIOCSPARAM: 469 pp = &sc->sc_param; 470 upp = (struct ppiparam *)data; 471 if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX || 472 upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX) 473 return EINVAL; 474 pp->burst = upp->burst; 475 pp->timo = ppimstohz(upp->timo); 476 pp->delay = ppimstohz(upp->delay); 477 break; 478 case PPIIOCSSEC: 479 sc->sc_sec = *(int *)data; 480 break; 481 default: 482 return EINVAL; 483 } 484 return error; 485 } 486 487 static int 488 ppihztoms(int h) 489 { 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 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
Indexes created Wed Oct 01 15:09:59 GMT 2025