wt.c revision 1.78.16.2
1 /* $NetBSD: wt.c,v 1.78.16.2 2008/06/02 13:23:32 mjf Exp $ */ 2 3 /* 4 * Streamer tape driver. 5 * Supports Archive and Wangtek compatible QIC-02/QIC-36 boards. 6 * 7 * Copyright (C) 1993 by: 8 * Sergey Ryzhkov <sir (at) kiae.su> 9 * Serge Vakulenko <vak (at) zebub.msk.su> 10 * 11 * This software is distributed with NO WARRANTIES, not even the implied 12 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 13 * 14 * Authors grant any other persons or organisations permission to use 15 * or modify this software as long as this message is kept with the software, 16 * all derivative works or modified versions. 17 * 18 * This driver is derived from the old 386bsd Wangtek streamer tape driver, 19 * made by Robert Baron at CMU, based on Intel sources. 20 */ 21 22 /* 23 * Copyright (c) 1989 Carnegie-Mellon University. 24 * All rights reserved. 25 * 26 * Authors: Robert Baron 27 * 28 * Permission to use, copy, modify and distribute this software and 29 * its documentation is hereby granted, provided that both the copyright 30 * notice and this permission notice appear in all copies of the 31 * software, derivative works or modified versions, and any portions 32 * thereof, and that both notices appear in supporting documentation. 33 * 34 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 35 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 36 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 37 * 38 * Carnegie Mellon requests users of this software to return to 39 * 40 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 41 * School of Computer Science 42 * Carnegie Mellon University 43 * Pittsburgh PA 15213-3890 44 * 45 * any improvements or extensions that they make and grant Carnegie the 46 * rights to redistribute these changes. 47 */ 48 49 /* 50 * Copyright 1988, 1989 by Intel Corporation 51 */ 52 53 #include <sys/cdefs.h> 54 __KERNEL_RCSID(0, "$NetBSD: wt.c,v 1.78.16.2 2008/06/02 13:23:32 mjf Exp $"); 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/callout.h> 59 #include <sys/kernel.h> 60 #include <sys/buf.h> 61 #include <sys/fcntl.h> 62 #include <sys/malloc.h> 63 #include <sys/ioctl.h> 64 #include <sys/mtio.h> 65 #include <sys/device.h> 66 #include <sys/proc.h> 67 #include <sys/lwp.h> 68 #include <sys/conf.h> 69 70 #include <sys/intr.h> 71 #include <sys/bus.h> 72 #include <machine/pio.h> 73 74 #include <dev/isa/isavar.h> 75 #include <dev/isa/isadmavar.h> 76 #include <dev/isa/wtreg.h> 77 78 /* 79 * Uncomment this to enable internal device tracing. 80 */ 81 #define WTDBPRINT(x) /* printf x */ 82 83 #define WTPRI (PZERO+10) /* sleep priority */ 84 85 #define WT_NPORT 2 /* 2 i/o ports */ 86 #define AV_NPORT 4 /* 4 i/o ports */ 87 88 enum wttype { 89 UNKNOWN = 0, /* unknown type, driver disabled */ 90 ARCHIVE, /* Archive Viper SC499, SC402 etc */ 91 WANGTEK, /* Wangtek */ 92 }; 93 94 static struct wtregs { 95 /* controller ports */ 96 int DATAPORT, /* data, read only */ 97 CMDPORT, /* command, write only */ 98 STATPORT, /* status, read only */ 99 CTLPORT, /* control, write only */ 100 SDMAPORT, /* start DMA */ 101 RDMAPORT; /* reset DMA */ 102 /* status port bits */ 103 u_char BUSY, /* not ready bit define */ 104 NOEXCEP, /* no exception bit define */ 105 RESETMASK, /* to check after reset */ 106 RESETVAL, /* state after reset */ 107 /* control port bits */ 108 ONLINE, /* device selected */ 109 RESET, /* reset command */ 110 REQUEST, /* request command */ 111 IEN; /* enable interrupts */ 112 } wtregs = { 113 1, 1, 0, 0, 0, 0, 114 0x01, 0x02, 0x07, 0x05, 115 0x01, 0x02, 0x04, 0x08 116 }, avregs = { 117 0, 0, 1, 1, 2, 3, 118 0x40, 0x20, 0xf8, 0x50, 119 0, 0x80, 0x40, 0x20 120 }; 121 122 struct wt_softc { 123 struct device sc_dev; 124 void *sc_ih; 125 126 bus_space_tag_t sc_iot; 127 bus_space_handle_t sc_ioh; 128 isa_chipset_tag_t sc_ic; 129 130 callout_t sc_timer_ch; 131 132 enum wttype type; /* type of controller */ 133 int chan; /* DMA channel number, 1..3 */ 134 int flags; /* state of tape drive */ 135 unsigned dens; /* tape density */ 136 int bsize; /* tape block size */ 137 void *buf; /* internal i/o buffer */ 138 139 void *dmavaddr; /* virtual address of DMA i/o buffer */ 140 size_t dmatotal; /* size of i/o buffer */ 141 int dmaflags; /* i/o direction */ 142 size_t dmacount; /* resulting length of DMA i/o */ 143 144 u_short error; /* code for error encountered */ 145 u_short ercnt; /* number of error blocks */ 146 u_short urcnt; /* number of underruns */ 147 148 struct wtregs regs; 149 }; 150 151 static dev_type_open(wtopen); 152 static dev_type_close(wtclose); 153 static dev_type_read(wtread); 154 static dev_type_write(wtwrite); 155 static dev_type_ioctl(wtioctl); 156 static dev_type_strategy(wtstrategy); 157 static dev_type_dump(wtdump); 158 static dev_type_size(wtsize); 159 160 const struct bdevsw wt_bdevsw = { 161 wtopen, wtclose, wtstrategy, wtioctl, wtdump, wtsize, D_TAPE 162 }; 163 164 const struct cdevsw wt_cdevsw = { 165 wtopen, wtclose, wtread, wtwrite, wtioctl, 166 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 167 }; 168 169 static int wtwait(struct wt_softc *sc, int catch, const char *msg); 170 static int wtcmd(struct wt_softc *sc, int cmd); 171 static int wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len); 172 static void wtdma(struct wt_softc *sc); 173 static void wttimer(void *arg); 174 static void wtclock(struct wt_softc *sc); 175 static int wtreset(bus_space_tag_t, bus_space_handle_t, struct wtregs *); 176 static int wtsense(struct wt_softc *sc, int verbose, int ignore); 177 static int wtstatus(struct wt_softc *sc); 178 static void wtrewind(struct wt_softc *sc); 179 static int wtreadfm(struct wt_softc *sc); 180 static int wtwritefm(struct wt_softc *sc); 181 static u_char wtsoft(struct wt_softc *sc, int mask, int bits); 182 static int wtintr(void *sc); 183 184 int wtprobe(struct device *, struct cfdata *, void *); 185 void wtattach(struct device *, struct device *, void *); 186 187 CFATTACH_DECL(wt, sizeof(struct wt_softc), 188 wtprobe, wtattach, NULL, NULL); 189 190 extern struct cfdriver wt_cd; 191 192 /* 193 * Probe for the presence of the device. 194 */ 195 int 196 wtprobe(struct device *parent, struct cfdata *match, 197 void *aux) 198 { 199 struct isa_attach_args *ia = aux; 200 bus_space_tag_t iot = ia->ia_iot; 201 bus_space_handle_t ioh; 202 int rv = 0, iosize; 203 204 if (ia->ia_nio < 1) 205 return (0); 206 if (ia->ia_nirq < 1) 207 return (0); 208 if (ia->ia_ndrq < 1) 209 return (0); 210 211 /* Disallow wildcarded i/o address. */ 212 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 213 return (0); 214 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 215 return (0); 216 217 if (ia->ia_drq[0].ir_drq < 1 || ia->ia_drq[0].ir_drq > 3) { 218 printf("wtprobe: Bad drq=%d, should be 1..3\n", 219 ia->ia_drq[0].ir_drq); 220 return (0); 221 } 222 223 iosize = AV_NPORT; 224 225 /* Map i/o space */ 226 if (bus_space_map(iot, ia->ia_io[0].ir_addr, iosize, 0, &ioh)) 227 return 0; 228 229 /* Try Wangtek. */ 230 if (wtreset(iot, ioh, &wtregs)) { 231 iosize = WT_NPORT; /* XXX misleading */ 232 rv = 1; 233 goto done; 234 } 235 236 /* Try Archive. */ 237 if (wtreset(iot, ioh, &avregs)) { 238 iosize = AV_NPORT; 239 rv = 1; 240 goto done; 241 } 242 243 done: 244 if (rv) { 245 ia->ia_nio = 1; 246 ia->ia_io[0].ir_size = iosize; 247 248 ia->ia_nirq = 1; 249 ia->ia_ndrq = 1; 250 251 ia->ia_niomem = 0; 252 } 253 bus_space_unmap(iot, ioh, AV_NPORT); 254 return rv; 255 } 256 257 /* 258 * Device is found, configure it. 259 */ 260 void 261 wtattach(struct device *parent, struct device *self, void *aux) 262 { 263 struct wt_softc *sc = (void *)self; 264 struct isa_attach_args *ia = aux; 265 bus_space_tag_t iot = ia->ia_iot; 266 bus_space_handle_t ioh; 267 bus_size_t maxsize; 268 int cmaj, bmaj; 269 270 /* Map i/o space */ 271 if (bus_space_map(iot, ia->ia_io[0].ir_addr, AV_NPORT, 0, &ioh)) { 272 printf(": can't map i/o space\n"); 273 return; 274 } 275 276 sc->sc_iot = iot; 277 sc->sc_ioh = ioh; 278 sc->sc_ic = ia->ia_ic; 279 280 callout_init(&sc->sc_timer_ch, 0); 281 282 /* Try Wangtek. */ 283 if (wtreset(iot, ioh, &wtregs)) { 284 sc->type = WANGTEK; 285 memcpy(&sc->regs, &wtregs, sizeof(sc->regs)); 286 printf(": type <Wangtek>\n"); 287 goto ok; 288 } 289 290 /* Try Archive. */ 291 if (wtreset(iot, ioh, &avregs)) { 292 sc->type = ARCHIVE; 293 memcpy(&sc->regs, &avregs, sizeof(sc->regs)); 294 printf(": type <Archive>\n"); 295 /* Reset DMA. */ 296 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 297 goto ok; 298 } 299 300 /* what happened? */ 301 aprint_error_dev(self, "lost controller\n"); 302 return; 303 304 ok: 305 sc->flags = TPSTART; /* tape is rewound */ 306 sc->dens = -1; /* unknown density */ 307 308 sc->chan = ia->ia_drq[0].ir_drq; 309 310 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->chan)) < MAXPHYS) { 311 aprint_error_dev(&sc->sc_dev, "max DMA size %lu is less than required %d\n", 312 (u_long)maxsize, MAXPHYS); 313 return; 314 } 315 316 if (isa_drq_alloc(sc->sc_ic, sc->chan) != 0) { 317 aprint_error_dev(&sc->sc_dev, "can't reserve drq %d\n", 318 sc->chan); 319 return; 320 } 321 322 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 323 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 324 aprint_error_dev(&sc->sc_dev, "can't set up ISA DMA map\n"); 325 return; 326 } 327 328 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 329 IST_EDGE, IPL_BIO, wtintr, sc); 330 331 bmaj = bdevsw_lookup_major(&wt_bdevsw); 332 cmaj = cdevsw_lookup_major(&wt_cdevsw); 333 334 /* raw devices */ 335 device_register_name(makedev(cmaj, 0), self, true, 336 DEV_OTHER, "rwt0"); 337 device_register_name(makedev(cmaj, 4), self, true, 338 DEV_OTHER, "nrwt0"); 339 device_register_name(makedev(cmaj, 8), self, true, 340 DEV_OTHER, "rwt8"); 341 device_register_name(makedev(cmaj, 12), self, true, 342 DEV_OTHER, "nrwt8"); 343 device_register_name(makedev(cmaj, 16), self, true, 344 DEV_OTHER, "rwt16"); 345 device_register_name(makedev(cmaj, 20), self, true, 346 DEV_OTHER, "nrwt16"); 347 348 /* block devices */ 349 device_register_name(makedev(bmaj, 0), self, false, 350 DEV_OTHER, "wt0"); 351 device_register_name(makedev(bmaj, 4), self, false, 352 DEV_OTHER, "nwt0"); 353 device_register_name(makedev(bmaj, 8), self, false, 354 DEV_OTHER, "wt8"); 355 device_register_name(makedev(bmaj, 12), self, false, 356 DEV_OTHER, "nwt8"); 357 device_register_name(makedev(bmaj, 16), self, false, 358 DEV_OTHER, "wt16"); 359 device_register_name(makedev(bmaj, 20), self, false, 360 DEV_OTHER, "nwt16"); 361 } 362 363 static int 364 wtdump(dev_t dev, daddr_t blkno, void *va, 365 size_t size) 366 { 367 368 /* Not implemented. */ 369 return ENXIO; 370 } 371 372 static int 373 wtsize(dev_t dev) 374 { 375 376 /* Not implemented. */ 377 return -1; 378 } 379 380 /* 381 * Open routine, called on every device open. 382 */ 383 static int 384 wtopen(dev_t dev, int flag, int mode, struct lwp *l) 385 { 386 int unit = minor(dev) & T_UNIT; 387 struct wt_softc *sc; 388 int error; 389 390 sc = device_lookup(&wt_cd, unit); 391 if (sc == NULL) 392 return (ENXIO); 393 394 /* Check that device is not in use */ 395 if (sc->flags & TPINUSE) 396 return EBUSY; 397 398 /* If the tape is in rewound state, check the status and set density. */ 399 if (sc->flags & TPSTART) { 400 /* If rewind is going on, wait */ 401 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 402 return error; 403 404 /* Check the controller status */ 405 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 406 /* Bad status, reset the controller. */ 407 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 408 return EIO; 409 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 410 return EIO; 411 } 412 413 /* Set up tape density. */ 414 if (sc->dens != (minor(dev) & WT_DENSEL)) { 415 int d = 0; 416 417 switch (minor(dev) & WT_DENSEL) { 418 case WT_DENSDFLT: 419 default: 420 break; /* default density */ 421 case WT_QIC11: 422 d = QIC_FMT11; break; /* minor 010 */ 423 case WT_QIC24: 424 d = QIC_FMT24; break; /* minor 020 */ 425 case WT_QIC120: 426 d = QIC_FMT120; break; /* minor 030 */ 427 case WT_QIC150: 428 d = QIC_FMT150; break; /* minor 040 */ 429 case WT_QIC300: 430 d = QIC_FMT300; break; /* minor 050 */ 431 case WT_QIC600: 432 d = QIC_FMT600; break; /* minor 060 */ 433 } 434 if (d) { 435 /* Change tape density. */ 436 if (!wtcmd(sc, d)) 437 return EIO; 438 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 439 return EIO; 440 441 /* Check the status of the controller. */ 442 if (sc->error & TP_ILL) { 443 aprint_error_dev(&sc->sc_dev, "invalid tape density\n"); 444 return ENODEV; 445 } 446 } 447 sc->dens = minor(dev) & WT_DENSEL; 448 } 449 sc->flags &= ~TPSTART; 450 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 451 return ENXIO; 452 453 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 454 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 455 456 sc->flags = TPINUSE; 457 if (flag & FREAD) 458 sc->flags |= TPREAD; 459 if (flag & FWRITE) 460 sc->flags |= TPWRITE; 461 return 0; 462 } 463 464 /* 465 * Close routine, called on last device close. 466 */ 467 static int 468 wtclose(dev_t dev, int flags, int mode, 469 struct lwp *l) 470 { 471 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 472 473 /* If rewind is pending, do nothing */ 474 if (sc->flags & TPREW) 475 goto done; 476 477 /* If seek forward is pending and no rewind on close, do nothing */ 478 if (sc->flags & TPRMARK) { 479 if (minor(dev) & T_NOREWIND) 480 goto done; 481 482 /* If read file mark is going on, wait */ 483 wtwait(sc, 0, "wtrfm"); 484 } 485 486 if (sc->flags & TPWANY) { 487 /* Tape was written. Write file mark. */ 488 wtwritefm(sc); 489 } 490 491 if ((minor(dev) & T_NOREWIND) == 0) { 492 /* Rewind to beginning of tape. */ 493 /* Don't wait until rewind, though. */ 494 wtrewind(sc); 495 goto done; 496 } 497 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 498 /* Space forward to after next file mark if no writing done. */ 499 /* Don't wait for completion. */ 500 wtreadfm(sc); 501 } 502 503 done: 504 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 505 free(sc->buf, M_TEMP); 506 return 0; 507 } 508 509 /* 510 * Ioctl routine. Compatible with BSD ioctls. 511 * Direct QIC-02 commands ERASE and RETENSION added. 512 * There are three possible ioctls: 513 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 514 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 515 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 516 */ 517 static int 518 wtioctl(dev_t dev, unsigned long cmd, void *addr, int flag, 519 struct lwp *l) 520 { 521 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 522 int error, count, op; 523 524 switch (cmd) { 525 default: 526 return EINVAL; 527 case WTQICMD: /* direct QIC command */ 528 op = *(int *)addr; 529 switch (op) { 530 default: 531 return EINVAL; 532 case QIC_ERASE: /* erase the whole tape */ 533 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 534 return EACCES; 535 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 536 return error; 537 break; 538 case QIC_RETENS: /* retension the tape */ 539 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 540 return error; 541 break; 542 } 543 /* Both ERASE and RETENS operations work like REWIND. */ 544 /* Simulate the rewind operation here. */ 545 sc->flags &= ~(TPRO | TPWO | TPVOL); 546 if (!wtcmd(sc, op)) 547 return EIO; 548 sc->flags |= TPSTART | TPREW; 549 if (op == QIC_ERASE) 550 sc->flags |= TPWANY; 551 wtclock(sc); 552 return 0; 553 case MTIOCIEOT: /* ignore EOT errors */ 554 case MTIOCEEOT: /* enable EOT errors */ 555 return 0; 556 case MTIOCGET: 557 ((struct mtget*)addr)->mt_type = 558 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 559 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 560 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 561 ((struct mtget*)addr)->mt_resid = 0; 562 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 563 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 564 return 0; 565 case MTIOCTOP: 566 break; 567 } 568 569 switch ((short)((struct mtop*)addr)->mt_op) { 570 default: 571 #if 0 572 case MTFSR: /* forward space record */ 573 case MTBSR: /* backward space record */ 574 case MTBSF: /* backward space file */ 575 #endif 576 return EINVAL; 577 case MTNOP: /* no operation, sets status only */ 578 case MTCACHE: /* enable controller cache */ 579 case MTNOCACHE: /* disable controller cache */ 580 return 0; 581 case MTREW: /* rewind */ 582 case MTOFFL: /* rewind and put the drive offline */ 583 if (sc->flags & TPREW) /* rewind is running */ 584 return 0; 585 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 586 return error; 587 wtrewind(sc); 588 return 0; 589 case MTFSF: /* forward space file */ 590 for (count = ((struct mtop*)addr)->mt_count; count > 0; 591 --count) { 592 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 593 return error; 594 if ((error = wtreadfm(sc)) != 0) 595 return error; 596 } 597 return 0; 598 case MTWEOF: /* write an end-of-file record */ 599 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 600 return EACCES; 601 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 602 return error; 603 if ((error = wtwritefm(sc)) != 0) 604 return error; 605 return 0; 606 } 607 608 #ifdef DIAGNOSTIC 609 panic("wtioctl: impossible"); 610 #endif 611 } 612 613 /* 614 * Strategy routine. 615 */ 616 static void 617 wtstrategy(struct buf *bp) 618 { 619 struct wt_softc *sc = device_lookup(&wt_cd, minor(bp->b_dev) & T_UNIT); 620 int s; 621 622 bp->b_resid = bp->b_bcount; 623 624 /* at file marks and end of tape, we just return '0 bytes available' */ 625 if (sc->flags & TPVOL) 626 goto xit; 627 628 if (bp->b_flags & B_READ) { 629 /* Check read access and no previous write to this tape. */ 630 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 631 goto errxit; 632 633 /* For now, we assume that all data will be copied out */ 634 /* If read command outstanding, just skip down */ 635 if ((sc->flags & TPRO) == 0) { 636 if (!wtsense(sc, 1, TP_WRP)) { 637 /* Clear status. */ 638 goto errxit; 639 } 640 if (!wtcmd(sc, QIC_RDDATA)) { 641 /* Set read mode. */ 642 wtsense(sc, 1, TP_WRP); 643 goto errxit; 644 } 645 sc->flags |= TPRO | TPRANY; 646 } 647 } else { 648 /* Check write access and write protection. */ 649 /* No previous read from this tape allowed. */ 650 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 651 goto errxit; 652 653 /* If write command outstanding, just skip down */ 654 if ((sc->flags & TPWO) == 0) { 655 if (!wtsense(sc, 1, 0)) { 656 /* Clear status. */ 657 goto errxit; 658 } 659 if (!wtcmd(sc, QIC_WRTDATA)) { 660 /* Set write mode. */ 661 wtsense(sc, 1, 0); 662 goto errxit; 663 } 664 sc->flags |= TPWO | TPWANY; 665 } 666 } 667 668 if (bp->b_bcount == 0) 669 goto xit; 670 671 sc->flags &= ~TPEXCEP; 672 s = splbio(); 673 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 674 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 675 bp->b_resid -= sc->dmacount; 676 } 677 splx(s); 678 679 if (sc->flags & TPEXCEP) { 680 errxit: 681 bp->b_error = EIO; 682 } 683 xit: 684 biodone(bp); 685 return; 686 } 687 688 static int 689 wtread(dev_t dev, struct uio *uio, int flags) 690 { 691 692 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 693 } 694 695 static int 696 wtwrite(dev_t dev, struct uio *uio, int flags) 697 { 698 699 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 700 } 701 702 /* 703 * Interrupt routine. 704 */ 705 static int 706 wtintr(void *arg) 707 { 708 struct wt_softc *sc = arg; 709 u_char x; 710 711 /* get status */ 712 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 713 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 714 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 715 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 716 WTDBPRINT(("busy\n")); 717 return 0; /* device is busy */ 718 } 719 720 /* 721 * Check if rewind finished. 722 */ 723 if (sc->flags & TPREW) { 724 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 725 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 726 "rewind busy?\n" : "rewind finished\n")); 727 sc->flags &= ~TPREW; /* rewind finished */ 728 wtsense(sc, 1, TP_WRP); 729 wakeup((void *)sc); 730 return 1; 731 } 732 733 /* 734 * Check if writing/reading of file mark finished. 735 */ 736 if (sc->flags & (TPRMARK | TPWMARK)) { 737 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 738 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 739 "marker r/w busy?\n" : "marker r/w finished\n")); 740 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 741 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 742 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 743 wakeup((void *)sc); 744 return 1; 745 } 746 747 /* 748 * Do we started any i/o? If no, just return. 749 */ 750 if ((sc->flags & TPACTIVE) == 0) { 751 WTDBPRINT(("unexpected interrupt\n")); 752 return 0; 753 } 754 sc->flags &= ~TPACTIVE; 755 sc->dmacount += sc->bsize; /* increment counter */ 756 757 /* 758 * Clean up DMA. 759 */ 760 if ((sc->dmaflags & DMAMODE_READ) && 761 (sc->dmatotal - sc->dmacount) < sc->bsize) { 762 /* If reading short block, copy the internal buffer 763 * to the user memory. */ 764 isa_dmadone(sc->sc_ic, sc->chan); 765 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 766 } else 767 isa_dmadone(sc->sc_ic, sc->chan); 768 769 /* 770 * On exception, check for end of file and end of volume. 771 */ 772 if ((x & sc->regs.NOEXCEP) == 0) { 773 WTDBPRINT(("i/o exception\n")); 774 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 775 if (sc->error & (TP_EOM | TP_FIL)) 776 sc->flags |= TPVOL; /* end of file */ 777 else 778 sc->flags |= TPEXCEP; /* i/o error */ 779 wakeup((void *)sc); 780 return 1; 781 } 782 783 if (sc->dmacount < sc->dmatotal) { 784 /* Continue I/O. */ 785 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 786 wtdma(sc); 787 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 788 return 1; 789 } 790 if (sc->dmacount > sc->dmatotal) /* short last block */ 791 sc->dmacount = sc->dmatotal; 792 /* Wake up user level. */ 793 wakeup((void *)sc); 794 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 795 return 1; 796 } 797 798 /* start the rewind operation */ 799 static void 800 wtrewind(struct wt_softc *sc) 801 { 802 int rwmode = sc->flags & (TPRO | TPWO); 803 804 sc->flags &= ~(TPRO | TPWO | TPVOL); 805 /* 806 * Wangtek strictly follows QIC-02 standard: 807 * clearing ONLINE in read/write modes causes rewind. 808 * REWIND command is not allowed in read/write mode 809 * and gives `illegal command' error. 810 */ 811 if (sc->type == WANGTEK && rwmode) { 812 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 813 } else if (!wtcmd(sc, QIC_REWIND)) 814 return; 815 sc->flags |= TPSTART | TPREW; 816 wtclock(sc); 817 } 818 819 /* 820 * Start the `read marker' operation. 821 */ 822 static int 823 wtreadfm(struct wt_softc *sc) 824 { 825 826 sc->flags &= ~(TPRO | TPWO | TPVOL); 827 if (!wtcmd(sc, QIC_READFM)) { 828 wtsense(sc, 1, TP_WRP); 829 return EIO; 830 } 831 sc->flags |= TPRMARK | TPRANY; 832 wtclock(sc); 833 /* Don't wait for completion here. */ 834 return 0; 835 } 836 837 /* 838 * Write marker to the tape. 839 */ 840 static int 841 wtwritefm(struct wt_softc *sc) 842 { 843 844 tsleep((void *)wtwritefm, WTPRI, "wtwfm", hz); 845 sc->flags &= ~(TPRO | TPWO); 846 if (!wtcmd(sc, QIC_WRITEFM)) { 847 wtsense(sc, 1, 0); 848 return EIO; 849 } 850 sc->flags |= TPWMARK | TPWANY; 851 wtclock(sc); 852 return wtwait(sc, 0, "wtwfm"); 853 } 854 855 /* 856 * While controller status & mask == bits continue waiting. 857 */ 858 static u_char 859 wtsoft(struct wt_softc *sc, int mask, int bits) 860 { 861 bus_space_tag_t iot = sc->sc_iot; 862 bus_space_handle_t ioh = sc->sc_ioh; 863 u_char x; 864 int i; 865 866 867 /* Poll status port, waiting for specified bits. */ 868 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 869 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 870 if ((x & mask) != bits) 871 return x; 872 delay(1); 873 } 874 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 875 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 876 if ((x & mask) != bits) 877 return x; 878 delay(100); 879 } 880 for (;;) { /* forever */ 881 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 882 if ((x & mask) != bits) 883 return x; 884 tsleep((void *)wtsoft, WTPRI, "wtsoft", 1); 885 } 886 } 887 888 /* 889 * Execute QIC command. 890 */ 891 static int 892 wtcmd(struct wt_softc *sc, int cmd) 893 { 894 bus_space_tag_t iot = sc->sc_iot; 895 bus_space_handle_t ioh = sc->sc_ioh; 896 u_char x; 897 int s; 898 899 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 900 s = splbio(); 901 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 902 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 903 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 904 splx(s); 905 return 0; 906 } 907 908 /* output the command */ 909 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 910 911 /* set request */ 912 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 913 sc->regs.REQUEST | sc->regs.ONLINE); 914 915 /* wait for ready */ 916 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 917 918 /* reset request */ 919 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 920 sc->regs.IEN | sc->regs.ONLINE); 921 922 /* wait for not ready */ 923 wtsoft(sc, sc->regs.BUSY, 0); 924 splx(s); 925 return 1; 926 } 927 928 /* wait for the end of i/o, seeking marker or rewind operation */ 929 static int 930 wtwait(struct wt_softc *sc, int catch, const char *msg) 931 { 932 int error; 933 934 WTDBPRINT(("wtwait() `%s'\n", msg)); 935 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 936 if ((error = tsleep((void *)sc, WTPRI | catch, msg, 0)) != 0) 937 return error; 938 return 0; 939 } 940 941 /* initialize DMA for the i/o operation */ 942 static void 943 wtdma(struct wt_softc *sc) 944 { 945 bus_space_tag_t iot = sc->sc_iot; 946 bus_space_handle_t ioh = sc->sc_ioh; 947 948 sc->flags |= TPACTIVE; 949 wtclock(sc); 950 951 if (sc->type == ARCHIVE) { 952 /* Set DMA. */ 953 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 954 } 955 956 if ((sc->dmaflags & DMAMODE_READ) && 957 (sc->dmatotal - sc->dmacount) < sc->bsize) { 958 /* Reading short block; do it through the internal buffer. */ 959 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 960 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 961 } else 962 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 963 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 964 } 965 966 /* start i/o operation */ 967 static int 968 wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len) 969 { 970 u_char x; 971 972 WTDBPRINT(("wtstart()\n")); 973 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 974 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 975 if ((x & sc->regs.NOEXCEP) == 0) { 976 sc->flags |= TPEXCEP; /* error */ 977 return 0; 978 } 979 sc->flags &= ~TPEXCEP; /* clear exception flag */ 980 sc->dmavaddr = vaddr; 981 sc->dmatotal = len; 982 sc->dmacount = 0; 983 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 984 wtdma(sc); 985 return 1; 986 } 987 988 /* 989 * Start timer. 990 */ 991 static void 992 wtclock(struct wt_softc *sc) 993 { 994 995 if (sc->flags & TPTIMER) 996 return; 997 sc->flags |= TPTIMER; 998 /* 999 * Some controllers seem to lose DMA interrupts too often. To make the 1000 * tape stream we need 1 tick timeout. 1001 */ 1002 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 1003 wttimer, sc); 1004 } 1005 1006 /* 1007 * Simulate an interrupt periodically while i/o is going. 1008 * This is necessary in case interrupts get eaten due to 1009 * multiple devices on a single IRQ line. 1010 */ 1011 static void 1012 wttimer(void *arg) 1013 { 1014 register struct wt_softc *sc = (struct wt_softc *)arg; 1015 int s; 1016 u_char status; 1017 1018 sc->flags &= ~TPTIMER; 1019 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 1020 return; 1021 1022 /* If i/o going, simulate interrupt. */ 1023 s = splbio(); 1024 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 1025 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 1026 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 1027 WTDBPRINT(("wttimer() -- ")); 1028 wtintr(sc); 1029 } 1030 splx(s); 1031 1032 /* Restart timer if i/o pending. */ 1033 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1034 wtclock(sc); 1035 } 1036 1037 /* 1038 * Perform QIC-02 and QIC-36 compatible reset sequence. 1039 */ 1040 static int 1041 wtreset(bus_space_tag_t iot, bus_space_handle_t ioh, struct wtregs *regs) 1042 { 1043 u_char x; 1044 int i; 1045 1046 /* send reset */ 1047 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1048 delay(30); 1049 /* turn off reset */ 1050 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1051 delay(30); 1052 1053 /* Read the controller status. */ 1054 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1055 if (x == 0xff) /* no port at this address? */ 1056 return 0; 1057 1058 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1059 for (i = 0; i < 3000; ++i) { 1060 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1061 break; 1062 delay(1000); 1063 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1064 } 1065 return (x & regs->RESETMASK) == regs->RESETVAL; 1066 } 1067 1068 /* 1069 * Get controller status information. Return 0 if user i/o request should 1070 * receive an i/o error code. 1071 */ 1072 static int 1073 wtsense(struct wt_softc *sc, int verbose, int ignore) 1074 { 1075 const char *msg = 0; 1076 int error; 1077 1078 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1079 sc->flags &= ~(TPRO | TPWO); 1080 if (!wtstatus(sc)) 1081 return 0; 1082 if ((sc->error & TP_ST0) == 0) 1083 sc->error &= ~TP_ST0MASK; 1084 if ((sc->error & TP_ST1) == 0) 1085 sc->error &= ~TP_ST1MASK; 1086 sc->error &= ~ignore; /* ignore certain errors */ 1087 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1088 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1089 if (!error) 1090 return 1; 1091 if (!verbose) 1092 return 0; 1093 1094 /* lifted from tdriver.c from Wangtek */ 1095 if (error & TP_USL) 1096 msg = "Drive not online"; 1097 else if (error & TP_CNI) 1098 msg = "No cartridge"; 1099 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1100 msg = "Tape is write protected"; 1101 sc->flags |= TPWP; 1102 } else if (error & TP_FIL) 1103 msg = 0 /*"Filemark detected"*/; 1104 else if (error & TP_EOM) 1105 msg = 0 /*"End of tape"*/; 1106 else if (error & TP_BNL) 1107 msg = "Block not located"; 1108 else if (error & TP_UDA) 1109 msg = "Unrecoverable data error"; 1110 else if (error & TP_NDT) 1111 msg = "No data detected"; 1112 else if (error & TP_ILL) 1113 msg = "Illegal command"; 1114 if (msg) 1115 printf("%s: %s\n", device_xname(&sc->sc_dev), msg); 1116 return 0; 1117 } 1118 1119 /* 1120 * Get controller status information. 1121 */ 1122 static int 1123 wtstatus(struct wt_softc *sc) 1124 { 1125 bus_space_tag_t iot = sc->sc_iot; 1126 bus_space_handle_t ioh = sc->sc_ioh; 1127 char *p; 1128 int s; 1129 1130 s = splbio(); 1131 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1132 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1133 /* send `read status' command */ 1134 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1135 1136 /* set request */ 1137 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1138 sc->regs.REQUEST | sc->regs.ONLINE); 1139 1140 /* wait for ready */ 1141 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1142 /* reset request */ 1143 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1144 1145 /* wait for not ready */ 1146 wtsoft(sc, sc->regs.BUSY, 0); 1147 1148 p = (char *)&sc->error; 1149 while (p < (char *)&sc->error + 6) { 1150 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1151 sc->regs.BUSY | sc->regs.NOEXCEP); 1152 1153 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1154 splx(s); 1155 return 0; 1156 } 1157 1158 /* read status byte */ 1159 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1160 1161 /* set request */ 1162 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1163 sc->regs.REQUEST | sc->regs.ONLINE); 1164 1165 /* wait for not ready */ 1166 wtsoft(sc, sc->regs.BUSY, 0); 1167 1168 /* unset request */ 1169 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1170 } 1171 splx(s); 1172 return 1; 1173 } 1174
Indexes created Thu Oct 16 14:10:15 GMT 2025