ss.c revision 1.69
1/* $NetBSD: ss.c,v 1.69 2006/11/16 01:33:26 christos Exp $ */ 2 3/* 4 * Copyright (c) 1995 Kenneth Stailey. All rights reserved. 5 * modified for configurable scanner support by Joachim Koenig 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Kenneth Stailey. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> 34__KERNEL_RCSID(0, "$NetBSD: ss.c,v 1.69 2006/11/16 01:33:26 christos Exp $"); 35 36#include <sys/param.h> 37#include <sys/systm.h> 38#include <sys/fcntl.h> 39#include <sys/errno.h> 40#include <sys/ioctl.h> 41#include <sys/malloc.h> 42#include <sys/buf.h> 43#include <sys/bufq.h> 44#include <sys/proc.h> 45#include <sys/user.h> 46#include <sys/device.h> 47#include <sys/conf.h> 48#include <sys/vnode.h> 49#include <sys/scanio.h> 50 51#include <dev/scsipi/scsi_all.h> 52#include <dev/scsipi/scsipi_all.h> 53#include <dev/scsipi/scsi_scanner.h> 54#include <dev/scsipi/scsiconf.h> 55#include <dev/scsipi/ssvar.h> 56 57#include <dev/scsipi/ss_mustek.h> 58 59#define SSMODE(z) ( minor(z) & 0x03) 60#define SSUNIT(z) ((minor(z) >> 4) ) 61#define SSNMINOR 16 62 63/* 64 * If the mode is 3 (e.g. minor = 3,7,11,15) 65 * then the device has been openned to set defaults 66 * This mode does NOT ALLOW I/O, only ioctls 67 */ 68#define MODE_REWIND 0 69#define MODE_NONREWIND 1 70#define MODE_CONTROL 3 71 72static int ssmatch(struct device *, struct cfdata *, void *); 73static void ssattach(struct device *, struct device *, void *); 74static int ssdetach(struct device *self, int flags); 75static int ssactivate(struct device *self, enum devact act); 76 77CFATTACH_DECL(ss, sizeof(struct ss_softc), 78 ssmatch, ssattach, ssdetach, ssactivate); 79 80extern struct cfdriver ss_cd; 81 82static dev_type_open(ssopen); 83static dev_type_close(ssclose); 84static dev_type_read(ssread); 85static dev_type_ioctl(ssioctl); 86 87const struct cdevsw ss_cdevsw = { 88 ssopen, ssclose, ssread, nowrite, ssioctl, 89 nostop, notty, nopoll, nommap, nokqfilter, D_OTHER, 90}; 91 92static void ssstrategy(struct buf *); 93static void ssstart(struct scsipi_periph *); 94static void ssdone(struct scsipi_xfer *, int); 95static void ssminphys(struct buf *); 96 97static const struct scsipi_periphsw ss_switch = { 98 NULL, 99 ssstart, 100 NULL, 101 ssdone, 102}; 103 104static const struct scsipi_inquiry_pattern ss_patterns[] = { 105 {T_SCANNER, T_FIXED, 106 "", "", ""}, 107 {T_SCANNER, T_REMOV, 108 "", "", ""}, 109 {T_PROCESSOR, T_FIXED, 110 "HP ", "C1130A ", ""}, 111 {T_PROCESSOR, T_FIXED, 112 "HP ", "C1750A ", ""}, 113 {T_PROCESSOR, T_FIXED, 114 "HP ", "C2500A ", ""}, 115 {T_PROCESSOR, T_FIXED, 116 "HP ", "C2520A ", ""}, 117 {T_PROCESSOR, T_FIXED, 118 "HP ", "C5110A ", ""}, 119 {T_PROCESSOR, T_FIXED, 120 "HP ", "C7670A ", ""}, 121 {T_PROCESSOR, T_FIXED, 122 "HP ", "", ""}, 123}; 124 125static int 126ssmatch(struct device *parent, struct cfdata *match, 127 void *aux) 128{ 129 struct scsipibus_attach_args *sa = aux; 130 int priority; 131 132 (void)scsipi_inqmatch(&sa->sa_inqbuf, 133 ss_patterns, sizeof(ss_patterns) / sizeof(ss_patterns[0]), 134 sizeof(ss_patterns[0]), &priority); 135 return (priority); 136} 137 138/* 139 * The routine called by the low level scsi routine when it discovers 140 * A device suitable for this driver 141 * If it is a know special, call special attach routine to install 142 * special handlers into the ss_softc structure 143 */ 144static void 145ssattach(struct device *parent, struct device *self, void *aux) 146{ 147 struct ss_softc *ss = device_private(self); 148 struct scsipibus_attach_args *sa = aux; 149 struct scsipi_periph *periph = sa->sa_periph; 150 151 SC_DEBUG(periph, SCSIPI_DB2, ("ssattach: ")); 152 153 ss->flags |= SSF_AUTOCONF; 154 155 /* 156 * Store information needed to contact our base driver 157 */ 158 ss->sc_periph = periph; 159 periph->periph_dev = &ss->sc_dev; 160 periph->periph_switch = &ss_switch; 161 162 printf("\n"); 163 164 /* 165 * Set up the buf queue for this device 166 */ 167 bufq_alloc(&ss->buf_queue, "fcfs", 0); 168 169 callout_init(&ss->sc_callout); 170 171 /* 172 * look for non-standard scanners with help of the quirk table 173 * and install functions for special handling 174 */ 175 SC_DEBUG(periph, SCSIPI_DB2, ("ssattach:\n")); 176 if (memcmp(sa->sa_inqbuf.vendor, "MUSTEK", 6) == 0) 177 mustek_attach(ss, sa); 178 if (memcmp(sa->sa_inqbuf.vendor, "HP ", 8) == 0 && 179 memcmp(sa->sa_inqbuf.product, "ScanJet 5300C", 13) != 0) 180 scanjet_attach(ss, sa); 181 if (ss->special == NULL) { 182 /* XXX add code to restart a SCSI2 scanner, if any */ 183 } 184 185 ss->flags &= ~SSF_AUTOCONF; 186} 187 188static int 189ssdetach(struct device *self, int flags) 190{ 191 struct ss_softc *ss = device_private(self); 192 int s, cmaj, mn; 193 194 /* locate the major number */ 195 cmaj = cdevsw_lookup_major(&ss_cdevsw); 196 197 /* kill any pending restart */ 198 callout_stop(&ss->sc_callout); 199 200 s = splbio(); 201 202 /* Kill off any queued buffers. */ 203 bufq_drain(ss->buf_queue); 204 205 bufq_free(ss->buf_queue); 206 207 /* Kill off any pending commands. */ 208 scsipi_kill_pending(ss->sc_periph); 209 210 splx(s); 211 212 /* Nuke the vnodes for any open instances */ 213 mn = SSUNIT(device_unit(self)); 214 vdevgone(cmaj, mn, mn+SSNMINOR-1, VCHR); 215 216 return (0); 217} 218 219static int 220ssactivate(struct device *self, enum devact act) 221{ 222 int rv = 0; 223 224 switch (act) { 225 case DVACT_ACTIVATE: 226 rv = EOPNOTSUPP; 227 break; 228 229 case DVACT_DEACTIVATE: 230 /* 231 * Nothing to do; we key off the device's DVF_ACTIVE. 232 */ 233 break; 234 } 235 return (rv); 236} 237 238/* 239 * open the device. 240 */ 241static int 242ssopen(dev_t dev, int flag, int mode, struct lwp *l) 243{ 244 int unit; 245 u_int ssmode; 246 int error; 247 struct ss_softc *ss; 248 struct scsipi_periph *periph; 249 struct scsipi_adapter *adapt; 250 251 unit = SSUNIT(dev); 252 if (unit >= ss_cd.cd_ndevs) 253 return (ENXIO); 254 ss = ss_cd.cd_devs[unit]; 255 if (!ss) 256 return (ENXIO); 257 258 if (!device_is_active(&ss->sc_dev)) 259 return (ENODEV); 260 261 ssmode = SSMODE(dev); 262 263 periph = ss->sc_periph; 264 adapt = periph->periph_channel->chan_adapter; 265 266 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 267 unit, ss_cd.cd_ndevs)); 268 269 if (periph->periph_flags & PERIPH_OPEN) { 270 printf("%s: already open\n", ss->sc_dev.dv_xname); 271 return (EBUSY); 272 } 273 274 if ((error = scsipi_adapter_addref(adapt)) != 0) 275 return (error); 276 277 /* 278 * Catch any unit attention errors. 279 * 280 * XS_CTL_IGNORE_MEDIA_CHANGE: when you have an ADF, some scanners 281 * consider paper to be a changeable media 282 * 283 */ 284 error = scsipi_test_unit_ready(periph, 285 XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_IGNORE_ILLEGAL_REQUEST | 286 (ssmode == MODE_CONTROL ? XS_CTL_IGNORE_NOT_READY : 0)); 287 if (error) 288 goto bad; 289 290 periph->periph_flags |= PERIPH_OPEN; /* unit attn now errors */ 291 292 /* 293 * If the mode is 3 (e.g. minor = 3,7,11,15) 294 * then the device has been opened to set defaults 295 * This mode does NOT ALLOW I/O, only ioctls 296 */ 297 if (ssmode == MODE_CONTROL) 298 return (0); 299 300 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 301 return (0); 302 303bad: 304 scsipi_adapter_delref(adapt); 305 periph->periph_flags &= ~PERIPH_OPEN; 306 return (error); 307} 308 309/* 310 * close the device.. only called if we are the LAST 311 * occurence of an open device 312 */ 313static int 314ssclose(dev_t dev, int flag, int mode, struct lwp *l) 315{ 316 struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(dev)]; 317 struct scsipi_periph *periph = ss->sc_periph; 318 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 319 int error; 320 321 SC_DEBUG(ss->sc_periph, SCSIPI_DB1, ("closing\n")); 322 323 if (SSMODE(dev) == MODE_REWIND) { 324 if (ss->special && ss->special->rewind_scanner) { 325 /* call special handler to rewind/abort scan */ 326 error = (ss->special->rewind_scanner)(ss); 327 if (error) 328 return (error); 329 } else { 330 /* XXX add code to restart a SCSI2 scanner, if any */ 331 } 332 ss->sio.scan_window_size = 0; 333 ss->flags &= ~SSF_TRIGGERED; 334 } 335 336 scsipi_wait_drain(periph); 337 338 scsipi_adapter_delref(adapt); 339 periph->periph_flags &= ~PERIPH_OPEN; 340 341 return (0); 342} 343 344/* 345 * trim the size of the transfer if needed, 346 * called by physio 347 * basically the smaller of our min and the scsi driver's 348 * minphys 349 */ 350static void 351ssminphys(struct buf *bp) 352{ 353 struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(bp->b_dev)]; 354 struct scsipi_periph *periph = ss->sc_periph; 355 356 scsipi_adapter_minphys(periph->periph_channel, bp); 357 358 /* 359 * trim the transfer further for special devices this is 360 * because some scanners only read multiples of a line at a 361 * time, also some cannot disconnect, so the read must be 362 * short enough to happen quickly 363 */ 364 if (ss->special && ss->special->minphys) 365 (ss->special->minphys)(ss, bp); 366} 367 368/* 369 * Do a read on a device for a user process. 370 * Prime scanner at start of read, check uio values, call ssstrategy 371 * via physio for the actual transfer. 372 */ 373static int 374ssread(dev_t dev, struct uio *uio, int flag) 375{ 376 struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(dev)]; 377 int error; 378 379 if (!device_is_active(&ss->sc_dev)) 380 return (ENODEV); 381 382 /* if the scanner has not yet been started, do it now */ 383 if (!(ss->flags & SSF_TRIGGERED)) { 384 if (ss->special && ss->special->trigger_scanner) { 385 error = (ss->special->trigger_scanner)(ss); 386 if (error) 387 return (error); 388 } 389 ss->flags |= SSF_TRIGGERED; 390 } 391 392 return (physio(ssstrategy, NULL, dev, B_READ, ssminphys, uio)); 393} 394 395/* 396 * Actually translate the requested transfer into one the physical 397 * driver can understand The transfer is described by a buf and will 398 * include only one physical transfer. 399 */ 400static void 401ssstrategy(struct buf *bp) 402{ 403 struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(bp->b_dev)]; 404 struct scsipi_periph *periph = ss->sc_periph; 405 int s; 406 407 SC_DEBUG(ss->sc_periph, SCSIPI_DB1, 408 ("ssstrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 409 410 /* 411 * If the device has been made invalid, error out 412 */ 413 if (!device_is_active(&ss->sc_dev)) { 414 bp->b_flags |= B_ERROR; 415 if (periph->periph_flags & PERIPH_OPEN) 416 bp->b_error = EIO; 417 else 418 bp->b_error = ENODEV; 419 goto done; 420 } 421 422 /* If negative offset, error */ 423 if (bp->b_blkno < 0) { 424 bp->b_flags |= B_ERROR; 425 bp->b_error = EINVAL; 426 goto done; 427 } 428 429 if (bp->b_bcount > ss->sio.scan_window_size) 430 bp->b_bcount = ss->sio.scan_window_size; 431 432 /* 433 * If it's a null transfer, return immediatly 434 */ 435 if (bp->b_bcount == 0) 436 goto done; 437 438 s = splbio(); 439 440 /* 441 * Place it in the queue of activities for this scanner 442 * at the end (a bit silly because we only have on user.. 443 * (but it could fork())) 444 */ 445 BUFQ_PUT(ss->buf_queue, bp); 446 447 /* 448 * Tell the device to get going on the transfer if it's 449 * not doing anything, otherwise just wait for completion 450 * (All a bit silly if we're only allowing 1 open but..) 451 */ 452 ssstart(ss->sc_periph); 453 454 splx(s); 455 return; 456done: 457 /* 458 * Correctly set the buf to indicate a completed xfer 459 */ 460 bp->b_resid = bp->b_bcount; 461 biodone(bp); 462} 463 464/* 465 * ssstart looks to see if there is a buf waiting for the device 466 * and that the device is not already busy. If both are true, 467 * It dequeues the buf and creates a scsi command to perform the 468 * transfer required. The transfer request will call scsipi_done 469 * on completion, which will in turn call this routine again 470 * so that the next queued transfer is performed. 471 * The bufs are queued by the strategy routine (ssstrategy) 472 * 473 * This routine is also called after other non-queued requests 474 * have been made of the scsi driver, to ensure that the queue 475 * continues to be drained. 476 * ssstart() is called at splbio 477 */ 478static void 479ssstart(struct scsipi_periph *periph) 480{ 481 struct ss_softc *ss = (void *)periph->periph_dev; 482 struct buf *bp; 483 484 SC_DEBUG(periph, SCSIPI_DB2, ("ssstart ")); 485 /* 486 * See if there is a buf to do and we are not already 487 * doing one 488 */ 489 while (periph->periph_active < periph->periph_openings) { 490 /* if a special awaits, let it proceed first */ 491 if (periph->periph_flags & PERIPH_WAITING) { 492 periph->periph_flags &= ~PERIPH_WAITING; 493 wakeup((caddr_t)periph); 494 return; 495 } 496 497 /* 498 * See if there is a buf with work for us to do.. 499 */ 500 if ((bp = BUFQ_PEEK(ss->buf_queue)) == NULL) 501 return; 502 503 if (ss->special && ss->special->read) { 504 (ss->special->read)(ss, bp); 505 } else { 506 /* generic scsi2 scanner read */ 507 /* XXX add code for SCSI2 scanner read */ 508 } 509 } 510} 511 512void 513ssrestart(void *v) 514{ 515 int s = splbio(); 516 ssstart((struct scsipi_periph *)v); 517 splx(s); 518} 519 520static void 521ssdone(struct scsipi_xfer *xs, int error) 522{ 523 struct buf *bp = xs->bp; 524 525 if (bp) { 526 bp->b_error = error; 527 bp->b_resid = xs->resid; 528 if (error) 529 bp->b_flags |= B_ERROR; 530 biodone(bp); 531 } 532} 533 534 535/* 536 * Perform special action on behalf of the user; 537 * knows about the internals of this device 538 */ 539int 540ssioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct lwp *l) 541{ 542 struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(dev)]; 543 int error = 0; 544 struct scan_io *sio; 545 546 if (!device_is_active(&ss->sc_dev)) 547 return (ENODEV); 548 549 switch (cmd) { 550 case SCIOCGET: 551 if (ss->special && ss->special->get_params) { 552 /* call special handler */ 553 error = (ss->special->get_params)(ss); 554 if (error) 555 return (error); 556 } else { 557 /* XXX add code for SCSI2 scanner, if any */ 558 return (EOPNOTSUPP); 559 } 560 memcpy(addr, &ss->sio, sizeof(struct scan_io)); 561 break; 562 case SCIOCSET: 563 sio = (struct scan_io *)addr; 564 565 if (ss->special && ss->special->set_params) { 566 /* call special handler */ 567 error = (ss->special->set_params)(ss, sio); 568 if (error) 569 return (error); 570 } else { 571 /* XXX add code for SCSI2 scanner, if any */ 572 return (EOPNOTSUPP); 573 } 574 break; 575 case SCIOCRESTART: 576 if (ss->special && ss->special->rewind_scanner ) { 577 /* call special handler */ 578 error = (ss->special->rewind_scanner)(ss); 579 if (error) 580 return (error); 581 } else 582 /* XXX add code for SCSI2 scanner, if any */ 583 return (EOPNOTSUPP); 584 ss->flags &= ~SSF_TRIGGERED; 585 break; 586#ifdef NOTYET 587 case SCAN_USE_ADF: 588 break; 589#endif 590 default: 591 return (scsipi_do_ioctl(ss->sc_periph, dev, cmd, addr, 592 flag, l)); 593 } 594 return (error); 595} 596