wt.c revision 1.44
1 /* $NetBSD: wt.c,v 1.44 1998/06/09 00:05:47 thorpej 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/param.h> 54 #include <sys/systm.h> 55 #include <sys/kernel.h> 56 #include <sys/buf.h> 57 #include <sys/fcntl.h> 58 #include <sys/malloc.h> 59 #include <sys/ioctl.h> 60 #include <sys/mtio.h> 61 #include <sys/device.h> 62 #include <sys/proc.h> 63 #include <sys/conf.h> 64 65 #include <vm/vm_param.h> 66 67 #include <machine/intr.h> 68 #include <machine/bus.h> 69 #include <machine/pio.h> 70 71 #include <dev/isa/isavar.h> 72 #include <dev/isa/isadmavar.h> 73 #include <dev/isa/wtreg.h> 74 75 /* 76 * Uncomment this to enable internal device tracing. 77 */ 78 #define WTDBPRINT(x) /* printf x */ 79 80 #define WTPRI (PZERO+10) /* sleep priority */ 81 82 #define WT_NPORT 2 /* 2 i/o ports */ 83 #define AV_NPORT 4 /* 4 i/o ports */ 84 85 enum wttype { 86 UNKNOWN = 0, /* unknown type, driver disabled */ 87 ARCHIVE, /* Archive Viper SC499, SC402 etc */ 88 WANGTEK, /* Wangtek */ 89 }; 90 91 static struct wtregs { 92 /* controller ports */ 93 int DATAPORT, /* data, read only */ 94 CMDPORT, /* command, write only */ 95 STATPORT, /* status, read only */ 96 CTLPORT, /* control, write only */ 97 SDMAPORT, /* start dma */ 98 RDMAPORT; /* reset dma */ 99 /* status port bits */ 100 u_char BUSY, /* not ready bit define */ 101 NOEXCEP, /* no exception bit define */ 102 RESETMASK, /* to check after reset */ 103 RESETVAL, /* state after reset */ 104 /* control port bits */ 105 ONLINE, /* device selected */ 106 RESET, /* reset command */ 107 REQUEST, /* request command */ 108 IEN; /* enable interrupts */ 109 } wtregs = { 110 1, 1, 0, 0, 0, 0, 111 0x01, 0x02, 0x07, 0x05, 112 0x01, 0x02, 0x04, 0x08 113 }, avregs = { 114 0, 0, 1, 1, 2, 3, 115 0x40, 0x20, 0xf8, 0x50, 116 0, 0x80, 0x40, 0x20 117 }; 118 119 struct wt_softc { 120 struct device sc_dev; 121 void *sc_ih; 122 123 bus_space_tag_t sc_iot; 124 bus_space_handle_t sc_ioh; 125 isa_chipset_tag_t sc_ic; 126 127 enum wttype type; /* type of controller */ 128 int chan; /* dma channel number, 1..3 */ 129 int flags; /* state of tape drive */ 130 unsigned dens; /* tape density */ 131 int bsize; /* tape block size */ 132 void *buf; /* internal i/o buffer */ 133 134 void *dmavaddr; /* virtual address of dma i/o buffer */ 135 size_t dmatotal; /* size of i/o buffer */ 136 int dmaflags; /* i/o direction */ 137 size_t dmacount; /* resulting length of dma i/o */ 138 139 u_short error; /* code for error encountered */ 140 u_short ercnt; /* number of error blocks */ 141 u_short urcnt; /* number of underruns */ 142 143 struct wtregs regs; 144 }; 145 146 /* XXX: These don't belong here really */ 147 cdev_decl(wt); 148 bdev_decl(wt); 149 150 int wtwait __P((struct wt_softc *sc, int catch, char *msg)); 151 int wtcmd __P((struct wt_softc *sc, int cmd)); 152 int wtstart __P((struct wt_softc *sc, int flag, void *vaddr, size_t len)); 153 void wtdma __P((struct wt_softc *sc)); 154 void wttimer __P((void *arg)); 155 void wtclock __P((struct wt_softc *sc)); 156 int wtreset __P((bus_space_tag_t, bus_space_handle_t, struct wtregs *)); 157 int wtsense __P((struct wt_softc *sc, int verbose, int ignore)); 158 int wtstatus __P((struct wt_softc *sc)); 159 void wtrewind __P((struct wt_softc *sc)); 160 int wtreadfm __P((struct wt_softc *sc)); 161 int wtwritefm __P((struct wt_softc *sc)); 162 u_char wtsoft __P((struct wt_softc *sc, int mask, int bits)); 163 164 #ifdef __BROKEN_INDIRECT_CONFIG 165 int wtprobe __P((struct device *, void *, void *)); 166 #else 167 int wtprobe __P((struct device *, struct cfdata *, void *)); 168 #endif 169 void wtattach __P((struct device *, struct device *, void *)); 170 int wtintr __P((void *sc)); 171 172 struct cfattach wt_ca = { 173 sizeof(struct wt_softc), wtprobe, wtattach 174 }; 175 176 extern struct cfdriver wt_cd; 177 178 /* 179 * Probe for the presence of the device. 180 */ 181 int 182 wtprobe(parent, match, aux) 183 struct device *parent; 184 #ifdef __BROKEN_INDIRECT_CONFIG 185 void *match; 186 #else 187 struct cfdata *match; 188 #endif 189 void *aux; 190 { 191 struct isa_attach_args *ia = aux; 192 bus_space_tag_t iot = ia->ia_iot; 193 bus_space_handle_t ioh; 194 int rv = 0; 195 196 197 /* Disallow wildcarded i/o address. */ 198 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 199 return (0); 200 201 if (ia->ia_drq < 1 || ia->ia_drq > 3) { 202 printf("wtprobe: Bad drq=%d, should be 1..3\n", ia->ia_drq); 203 return (0); 204 } 205 206 /* Map i/o space */ 207 if (bus_space_map(iot, ia->ia_iobase, AV_NPORT, 0, &ioh)) 208 return 0; 209 210 /* Try Wangtek. */ 211 if (wtreset(iot, ioh, &wtregs)) { 212 ia->ia_iosize = WT_NPORT; /* XXX misleading */ 213 rv = 1; 214 goto done; 215 } 216 217 /* Try Archive. */ 218 if (wtreset(iot, ioh, &avregs)) { 219 ia->ia_iosize = AV_NPORT; 220 rv = 1; 221 goto done; 222 } 223 224 done: 225 bus_space_unmap(iot, ioh, AV_NPORT); 226 return rv; 227 } 228 229 /* 230 * Device is found, configure it. 231 */ 232 void 233 wtattach(parent, self, aux) 234 struct device *parent, *self; 235 void *aux; 236 { 237 struct wt_softc *sc = (void *)self; 238 struct isa_attach_args *ia = aux; 239 bus_space_tag_t iot = ia->ia_iot; 240 bus_space_handle_t ioh; 241 242 /* Map i/o space */ 243 if (bus_space_map(iot, ia->ia_iobase, AV_NPORT, 0, &ioh)) { 244 printf(": can't map i/o space\n"); 245 return; 246 } 247 248 sc->sc_iot = iot; 249 sc->sc_ioh = ioh; 250 sc->sc_ic = ia->ia_ic; 251 252 /* Try Wangtek. */ 253 if (wtreset(iot, ioh, &wtregs)) { 254 sc->type = WANGTEK; 255 bcopy(&wtregs, &sc->regs, sizeof(sc->regs)); 256 printf(": type <Wangtek>\n"); 257 goto ok; 258 } 259 260 /* Try Archive. */ 261 if (wtreset(iot, ioh, &avregs)) { 262 sc->type = ARCHIVE; 263 bcopy(&avregs, &sc->regs, sizeof(sc->regs)); 264 printf(": type <Archive>\n"); 265 /* Reset DMA. */ 266 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 267 goto ok; 268 } 269 270 /* what happened? */ 271 printf("%s: lost controller\n", self->dv_xname); 272 return; 273 274 ok: 275 sc->flags = TPSTART; /* tape is rewound */ 276 sc->dens = -1; /* unknown density */ 277 278 sc->chan = ia->ia_drq; 279 280 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 281 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 282 printf("%s: can't set up ISA DMA map\n", 283 sc->sc_dev.dv_xname); 284 return; 285 } 286 287 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 288 IPL_BIO, wtintr, sc); 289 } 290 291 int 292 wtdump(dev, blkno, va, size) 293 dev_t dev; 294 daddr_t blkno; 295 caddr_t va; 296 size_t size; 297 { 298 299 /* Not implemented. */ 300 return ENXIO; 301 } 302 303 int 304 wtsize(dev) 305 dev_t dev; 306 { 307 308 /* Not implemented. */ 309 return -1; 310 } 311 312 /* 313 * Open routine, called on every device open. 314 */ 315 int 316 wtopen(dev, flag, mode, p) 317 dev_t dev; 318 int flag; 319 int mode; 320 struct proc *p; 321 { 322 int unit = minor(dev) & T_UNIT; 323 struct wt_softc *sc; 324 int error; 325 326 if (unit >= wt_cd.cd_ndevs) 327 return ENXIO; 328 sc = wt_cd.cd_devs[unit]; 329 if (!sc) 330 return ENXIO; 331 332 /* Check that device is not in use */ 333 if (sc->flags & TPINUSE) 334 return EBUSY; 335 336 /* If the tape is in rewound state, check the status and set density. */ 337 if (sc->flags & TPSTART) { 338 /* If rewind is going on, wait */ 339 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 340 return error; 341 342 /* Check the controller status */ 343 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 344 /* Bad status, reset the controller. */ 345 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 346 return EIO; 347 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 348 return EIO; 349 } 350 351 /* Set up tape density. */ 352 if (sc->dens != (minor(dev) & WT_DENSEL)) { 353 int d = 0; 354 355 switch (minor(dev) & WT_DENSEL) { 356 case WT_DENSDFLT: 357 default: 358 break; /* default density */ 359 case WT_QIC11: 360 d = QIC_FMT11; break; /* minor 010 */ 361 case WT_QIC24: 362 d = QIC_FMT24; break; /* minor 020 */ 363 case WT_QIC120: 364 d = QIC_FMT120; break; /* minor 030 */ 365 case WT_QIC150: 366 d = QIC_FMT150; break; /* minor 040 */ 367 case WT_QIC300: 368 d = QIC_FMT300; break; /* minor 050 */ 369 case WT_QIC600: 370 d = QIC_FMT600; break; /* minor 060 */ 371 } 372 if (d) { 373 /* Change tape density. */ 374 if (!wtcmd(sc, d)) 375 return EIO; 376 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 377 return EIO; 378 379 /* Check the status of the controller. */ 380 if (sc->error & TP_ILL) { 381 printf("%s: invalid tape density\n", 382 sc->sc_dev.dv_xname); 383 return ENODEV; 384 } 385 } 386 sc->dens = minor(dev) & WT_DENSEL; 387 } 388 sc->flags &= ~TPSTART; 389 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 390 return ENXIO; 391 392 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 393 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 394 395 sc->flags = TPINUSE; 396 if (flag & FREAD) 397 sc->flags |= TPREAD; 398 if (flag & FWRITE) 399 sc->flags |= TPWRITE; 400 return 0; 401 } 402 403 /* 404 * Close routine, called on last device close. 405 */ 406 int 407 wtclose(dev, flags, mode, p) 408 dev_t dev; 409 int flags; 410 int mode; 411 struct proc *p; 412 { 413 int unit = minor(dev) & T_UNIT; 414 struct wt_softc *sc = wt_cd.cd_devs[unit]; 415 416 /* If rewind is pending, do nothing */ 417 if (sc->flags & TPREW) 418 goto done; 419 420 /* If seek forward is pending and no rewind on close, do nothing */ 421 if (sc->flags & TPRMARK) { 422 if (minor(dev) & T_NOREWIND) 423 goto done; 424 425 /* If read file mark is going on, wait */ 426 wtwait(sc, 0, "wtrfm"); 427 } 428 429 if (sc->flags & TPWANY) { 430 /* Tape was written. Write file mark. */ 431 wtwritefm(sc); 432 } 433 434 if ((minor(dev) & T_NOREWIND) == 0) { 435 /* Rewind to beginning of tape. */ 436 /* Don't wait until rewind, though. */ 437 wtrewind(sc); 438 goto done; 439 } 440 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 441 /* Space forward to after next file mark if no writing done. */ 442 /* Don't wait for completion. */ 443 wtreadfm(sc); 444 } 445 446 done: 447 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 448 free(sc->buf, M_TEMP); 449 return 0; 450 } 451 452 /* 453 * Ioctl routine. Compatible with BSD ioctls. 454 * Direct QIC-02 commands ERASE and RETENSION added. 455 * There are three possible ioctls: 456 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 457 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 458 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 459 */ 460 int 461 wtioctl(dev, cmd, addr, flag, p) 462 dev_t dev; 463 u_long cmd; 464 caddr_t addr; 465 int flag; 466 struct proc *p; 467 { 468 int unit = minor(dev) & T_UNIT; 469 struct wt_softc *sc = wt_cd.cd_devs[unit]; 470 int error, count, op; 471 472 switch (cmd) { 473 default: 474 return EINVAL; 475 case WTQICMD: /* direct QIC command */ 476 op = *(int *)addr; 477 switch (op) { 478 default: 479 return EINVAL; 480 case QIC_ERASE: /* erase the whole tape */ 481 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 482 return EACCES; 483 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 484 return error; 485 break; 486 case QIC_RETENS: /* retension the tape */ 487 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 488 return error; 489 break; 490 } 491 /* Both ERASE and RETENS operations work like REWIND. */ 492 /* Simulate the rewind operation here. */ 493 sc->flags &= ~(TPRO | TPWO | TPVOL); 494 if (!wtcmd(sc, op)) 495 return EIO; 496 sc->flags |= TPSTART | TPREW; 497 if (op == QIC_ERASE) 498 sc->flags |= TPWANY; 499 wtclock(sc); 500 return 0; 501 case MTIOCIEOT: /* ignore EOT errors */ 502 case MTIOCEEOT: /* enable EOT errors */ 503 return 0; 504 case MTIOCGET: 505 ((struct mtget*)addr)->mt_type = 506 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 507 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 508 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 509 ((struct mtget*)addr)->mt_resid = 0; 510 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 511 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 512 return 0; 513 case MTIOCTOP: 514 break; 515 } 516 517 switch ((short)((struct mtop*)addr)->mt_op) { 518 default: 519 #if 0 520 case MTFSR: /* forward space record */ 521 case MTBSR: /* backward space record */ 522 case MTBSF: /* backward space file */ 523 #endif 524 return EINVAL; 525 case MTNOP: /* no operation, sets status only */ 526 case MTCACHE: /* enable controller cache */ 527 case MTNOCACHE: /* disable controller cache */ 528 return 0; 529 case MTREW: /* rewind */ 530 case MTOFFL: /* rewind and put the drive offline */ 531 if (sc->flags & TPREW) /* rewind is running */ 532 return 0; 533 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 534 return error; 535 wtrewind(sc); 536 return 0; 537 case MTFSF: /* forward space file */ 538 for (count = ((struct mtop*)addr)->mt_count; count > 0; 539 --count) { 540 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 541 return error; 542 if ((error = wtreadfm(sc)) != 0) 543 return error; 544 } 545 return 0; 546 case MTWEOF: /* write an end-of-file record */ 547 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 548 return EACCES; 549 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 550 return error; 551 if ((error = wtwritefm(sc)) != 0) 552 return error; 553 return 0; 554 } 555 556 #ifdef DIAGNOSTIC 557 panic("wtioctl: impossible"); 558 #endif 559 } 560 561 /* 562 * Strategy routine. 563 */ 564 void 565 wtstrategy(bp) 566 struct buf *bp; 567 { 568 int unit = minor(bp->b_dev) & T_UNIT; 569 struct wt_softc *sc = wt_cd.cd_devs[unit]; 570 int s; 571 572 bp->b_resid = bp->b_bcount; 573 574 /* at file marks and end of tape, we just return '0 bytes available' */ 575 if (sc->flags & TPVOL) 576 goto xit; 577 578 if (bp->b_flags & B_READ) { 579 /* Check read access and no previous write to this tape. */ 580 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 581 goto errxit; 582 583 /* For now, we assume that all data will be copied out */ 584 /* If read command outstanding, just skip down */ 585 if ((sc->flags & TPRO) == 0) { 586 if (!wtsense(sc, 1, TP_WRP)) { 587 /* Clear status. */ 588 goto errxit; 589 } 590 if (!wtcmd(sc, QIC_RDDATA)) { 591 /* Set read mode. */ 592 wtsense(sc, 1, TP_WRP); 593 goto errxit; 594 } 595 sc->flags |= TPRO | TPRANY; 596 } 597 } else { 598 /* Check write access and write protection. */ 599 /* No previous read from this tape allowed. */ 600 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 601 goto errxit; 602 603 /* If write command outstanding, just skip down */ 604 if ((sc->flags & TPWO) == 0) { 605 if (!wtsense(sc, 1, 0)) { 606 /* Clear status. */ 607 goto errxit; 608 } 609 if (!wtcmd(sc, QIC_WRTDATA)) { 610 /* Set write mode. */ 611 wtsense(sc, 1, 0); 612 goto errxit; 613 } 614 sc->flags |= TPWO | TPWANY; 615 } 616 } 617 618 if (bp->b_bcount == 0) 619 goto xit; 620 621 sc->flags &= ~TPEXCEP; 622 s = splbio(); 623 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 624 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 625 bp->b_resid -= sc->dmacount; 626 } 627 splx(s); 628 629 if (sc->flags & TPEXCEP) { 630 errxit: 631 bp->b_flags |= B_ERROR; 632 bp->b_error = EIO; 633 } 634 xit: 635 biodone(bp); 636 return; 637 } 638 639 int 640 wtread(dev, uio, flags) 641 dev_t dev; 642 struct uio *uio; 643 int flags; 644 { 645 646 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 647 } 648 649 int 650 wtwrite(dev, uio, flags) 651 dev_t dev; 652 struct uio *uio; 653 int flags; 654 { 655 656 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 657 } 658 659 /* 660 * Interrupt routine. 661 */ 662 int 663 wtintr(arg) 664 void *arg; 665 { 666 struct wt_softc *sc = arg; 667 u_char x; 668 669 /* get status */ 670 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 671 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 672 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 673 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 674 WTDBPRINT(("busy\n")); 675 return 0; /* device is busy */ 676 } 677 678 /* 679 * Check if rewind finished. 680 */ 681 if (sc->flags & TPREW) { 682 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 683 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 684 "rewind busy?\n" : "rewind finished\n")); 685 sc->flags &= ~TPREW; /* rewind finished */ 686 wtsense(sc, 1, TP_WRP); 687 wakeup((caddr_t)sc); 688 return 1; 689 } 690 691 /* 692 * Check if writing/reading of file mark finished. 693 */ 694 if (sc->flags & (TPRMARK | TPWMARK)) { 695 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 696 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 697 "marker r/w busy?\n" : "marker r/w finished\n")); 698 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 699 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 700 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 701 wakeup((caddr_t)sc); 702 return 1; 703 } 704 705 /* 706 * Do we started any i/o? If no, just return. 707 */ 708 if ((sc->flags & TPACTIVE) == 0) { 709 WTDBPRINT(("unexpected interrupt\n")); 710 return 0; 711 } 712 sc->flags &= ~TPACTIVE; 713 sc->dmacount += sc->bsize; /* increment counter */ 714 715 /* 716 * Clean up dma. 717 */ 718 if ((sc->dmaflags & DMAMODE_READ) && 719 (sc->dmatotal - sc->dmacount) < sc->bsize) { 720 /* If reading short block, copy the internal buffer 721 * to the user memory. */ 722 isa_dmadone(sc->sc_ic, sc->chan); 723 bcopy(sc->buf, sc->dmavaddr, sc->dmatotal - sc->dmacount); 724 } else 725 isa_dmadone(sc->sc_ic, sc->chan); 726 727 /* 728 * On exception, check for end of file and end of volume. 729 */ 730 if ((x & sc->regs.NOEXCEP) == 0) { 731 WTDBPRINT(("i/o exception\n")); 732 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 733 if (sc->error & (TP_EOM | TP_FIL)) 734 sc->flags |= TPVOL; /* end of file */ 735 else 736 sc->flags |= TPEXCEP; /* i/o error */ 737 wakeup((caddr_t)sc); 738 return 1; 739 } 740 741 if (sc->dmacount < sc->dmatotal) { 742 /* Continue I/O. */ 743 sc->dmavaddr += sc->bsize; 744 wtdma(sc); 745 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 746 return 1; 747 } 748 if (sc->dmacount > sc->dmatotal) /* short last block */ 749 sc->dmacount = sc->dmatotal; 750 /* Wake up user level. */ 751 wakeup((caddr_t)sc); 752 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 753 return 1; 754 } 755 756 /* start the rewind operation */ 757 void 758 wtrewind(sc) 759 struct wt_softc *sc; 760 { 761 int rwmode = sc->flags & (TPRO | TPWO); 762 763 sc->flags &= ~(TPRO | TPWO | TPVOL); 764 /* 765 * Wangtek strictly follows QIC-02 standard: 766 * clearing ONLINE in read/write modes causes rewind. 767 * REWIND command is not allowed in read/write mode 768 * and gives `illegal command' error. 769 */ 770 if (sc->type == WANGTEK && rwmode) { 771 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 772 } else if (!wtcmd(sc, QIC_REWIND)) 773 return; 774 sc->flags |= TPSTART | TPREW; 775 wtclock(sc); 776 } 777 778 /* 779 * Start the `read marker' operation. 780 */ 781 int 782 wtreadfm(sc) 783 struct wt_softc *sc; 784 { 785 786 sc->flags &= ~(TPRO | TPWO | TPVOL); 787 if (!wtcmd(sc, QIC_READFM)) { 788 wtsense(sc, 1, TP_WRP); 789 return EIO; 790 } 791 sc->flags |= TPRMARK | TPRANY; 792 wtclock(sc); 793 /* Don't wait for completion here. */ 794 return 0; 795 } 796 797 /* 798 * Write marker to the tape. 799 */ 800 int 801 wtwritefm(sc) 802 struct wt_softc *sc; 803 { 804 805 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 806 sc->flags &= ~(TPRO | TPWO); 807 if (!wtcmd(sc, QIC_WRITEFM)) { 808 wtsense(sc, 1, 0); 809 return EIO; 810 } 811 sc->flags |= TPWMARK | TPWANY; 812 wtclock(sc); 813 return wtwait(sc, 0, "wtwfm"); 814 } 815 816 /* 817 * While controller status & mask == bits continue waiting. 818 */ 819 u_char 820 wtsoft(sc, mask, bits) 821 struct wt_softc *sc; 822 int mask, bits; 823 { 824 bus_space_tag_t iot = sc->sc_iot; 825 bus_space_handle_t ioh = sc->sc_ioh; 826 u_char x; 827 int i; 828 829 830 /* Poll status port, waiting for specified bits. */ 831 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 832 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 833 if ((x & mask) != bits) 834 return x; 835 delay(1); 836 } 837 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 838 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 839 if ((x & mask) != bits) 840 return x; 841 delay(100); 842 } 843 for (;;) { /* forever */ 844 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 845 if ((x & mask) != bits) 846 return x; 847 tsleep((caddr_t)wtsoft, WTPRI, "wtsoft", 1); 848 } 849 } 850 851 /* 852 * Execute QIC command. 853 */ 854 int 855 wtcmd(sc, cmd) 856 struct wt_softc *sc; 857 int cmd; 858 { 859 bus_space_tag_t iot = sc->sc_iot; 860 bus_space_handle_t ioh = sc->sc_ioh; 861 u_char x; 862 int s; 863 864 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 865 s = splbio(); 866 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 867 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 868 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 869 splx(s); 870 return 0; 871 } 872 873 /* output the command */ 874 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 875 876 /* set request */ 877 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 878 sc->regs.REQUEST | sc->regs.ONLINE); 879 880 /* wait for ready */ 881 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 882 883 /* reset request */ 884 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 885 sc->regs.IEN | sc->regs.ONLINE); 886 887 /* wait for not ready */ 888 wtsoft(sc, sc->regs.BUSY, 0); 889 splx(s); 890 return 1; 891 } 892 893 /* wait for the end of i/o, seeking marker or rewind operation */ 894 int 895 wtwait(sc, catch, msg) 896 struct wt_softc *sc; 897 int catch; 898 char *msg; 899 { 900 int error; 901 902 WTDBPRINT(("wtwait() `%s'\n", msg)); 903 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 904 if ((error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) != 0) 905 return error; 906 return 0; 907 } 908 909 /* initialize dma for the i/o operation */ 910 void 911 wtdma(sc) 912 struct wt_softc *sc; 913 { 914 bus_space_tag_t iot = sc->sc_iot; 915 bus_space_handle_t ioh = sc->sc_ioh; 916 917 sc->flags |= TPACTIVE; 918 wtclock(sc); 919 920 if (sc->type == ARCHIVE) { 921 /* Set DMA. */ 922 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 923 } 924 925 if ((sc->dmaflags & DMAMODE_READ) && 926 (sc->dmatotal - sc->dmacount) < sc->bsize) { 927 /* Reading short block; do it through the internal buffer. */ 928 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 929 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 930 } else 931 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 932 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 933 } 934 935 /* start i/o operation */ 936 int 937 wtstart(sc, flag, vaddr, len) 938 struct wt_softc *sc; 939 int flag; 940 void *vaddr; 941 size_t len; 942 { 943 u_char x; 944 945 WTDBPRINT(("wtstart()\n")); 946 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 947 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 948 if ((x & sc->regs.NOEXCEP) == 0) { 949 sc->flags |= TPEXCEP; /* error */ 950 return 0; 951 } 952 sc->flags &= ~TPEXCEP; /* clear exception flag */ 953 sc->dmavaddr = vaddr; 954 sc->dmatotal = len; 955 sc->dmacount = 0; 956 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 957 wtdma(sc); 958 return 1; 959 } 960 961 /* 962 * Start timer. 963 */ 964 void 965 wtclock(sc) 966 struct wt_softc *sc; 967 { 968 969 if (sc->flags & TPTIMER) 970 return; 971 sc->flags |= TPTIMER; 972 /* 973 * Some controllers seem to lose dma interrupts too often. To make the 974 * tape stream we need 1 tick timeout. 975 */ 976 timeout(wttimer, sc, (sc->flags & TPACTIVE) ? 1 : hz); 977 } 978 979 /* 980 * Simulate an interrupt periodically while i/o is going. 981 * This is necessary in case interrupts get eaten due to 982 * multiple devices on a single IRQ line. 983 */ 984 void 985 wttimer(arg) 986 void *arg; 987 { 988 register struct wt_softc *sc = (struct wt_softc *)arg; 989 int s; 990 u_char status; 991 992 sc->flags &= ~TPTIMER; 993 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 994 return; 995 996 /* If i/o going, simulate interrupt. */ 997 s = splbio(); 998 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 999 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 1000 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 1001 WTDBPRINT(("wttimer() -- ")); 1002 wtintr(sc); 1003 } 1004 splx(s); 1005 1006 /* Restart timer if i/o pending. */ 1007 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1008 wtclock(sc); 1009 } 1010 1011 /* 1012 * Perform QIC-02 and QIC-36 compatible reset sequence. 1013 */ 1014 int 1015 wtreset(iot, ioh, regs) 1016 bus_space_tag_t iot; 1017 bus_space_handle_t ioh; 1018 struct wtregs *regs; 1019 { 1020 u_char x; 1021 int i; 1022 1023 /* send reset */ 1024 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1025 delay(30); 1026 /* turn off reset */ 1027 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1028 delay(30); 1029 1030 /* Read the controller status. */ 1031 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1032 if (x == 0xff) /* no port at this address? */ 1033 return 0; 1034 1035 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1036 for (i = 0; i < 3000; ++i) { 1037 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1038 break; 1039 delay(1000); 1040 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1041 } 1042 return (x & regs->RESETMASK) == regs->RESETVAL; 1043 } 1044 1045 /* 1046 * Get controller status information. Return 0 if user i/o request should 1047 * receive an i/o error code. 1048 */ 1049 int 1050 wtsense(sc, verbose, ignore) 1051 struct wt_softc *sc; 1052 int verbose, ignore; 1053 { 1054 char *msg = 0; 1055 int error; 1056 1057 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1058 sc->flags &= ~(TPRO | TPWO); 1059 if (!wtstatus(sc)) 1060 return 0; 1061 if ((sc->error & TP_ST0) == 0) 1062 sc->error &= ~TP_ST0MASK; 1063 if ((sc->error & TP_ST1) == 0) 1064 sc->error &= ~TP_ST1MASK; 1065 sc->error &= ~ignore; /* ignore certain errors */ 1066 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1067 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1068 if (!error) 1069 return 1; 1070 if (!verbose) 1071 return 0; 1072 1073 /* lifted from tdriver.c from Wangtek */ 1074 if (error & TP_USL) 1075 msg = "Drive not online"; 1076 else if (error & TP_CNI) 1077 msg = "No cartridge"; 1078 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1079 msg = "Tape is write protected"; 1080 sc->flags |= TPWP; 1081 } else if (error & TP_FIL) 1082 msg = 0 /*"Filemark detected"*/; 1083 else if (error & TP_EOM) 1084 msg = 0 /*"End of tape"*/; 1085 else if (error & TP_BNL) 1086 msg = "Block not located"; 1087 else if (error & TP_UDA) 1088 msg = "Unrecoverable data error"; 1089 else if (error & TP_NDT) 1090 msg = "No data detected"; 1091 else if (error & TP_ILL) 1092 msg = "Illegal command"; 1093 if (msg) 1094 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 1095 return 0; 1096 } 1097 1098 /* 1099 * Get controller status information. 1100 */ 1101 int 1102 wtstatus(sc) 1103 struct wt_softc *sc; 1104 { 1105 bus_space_tag_t iot = sc->sc_iot; 1106 bus_space_handle_t ioh = sc->sc_ioh; 1107 char *p; 1108 int s; 1109 1110 s = splbio(); 1111 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1112 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1113 /* send `read status' command */ 1114 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1115 1116 /* set request */ 1117 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1118 sc->regs.REQUEST | sc->regs.ONLINE); 1119 1120 /* wait for ready */ 1121 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1122 /* reset request */ 1123 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1124 1125 /* wait for not ready */ 1126 wtsoft(sc, sc->regs.BUSY, 0); 1127 1128 p = (char *)&sc->error; 1129 while (p < (char *)&sc->error + 6) { 1130 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1131 sc->regs.BUSY | sc->regs.NOEXCEP); 1132 1133 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1134 splx(s); 1135 return 0; 1136 } 1137 1138 /* read status byte */ 1139 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1140 1141 /* set request */ 1142 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1143 sc->regs.REQUEST | sc->regs.ONLINE); 1144 1145 /* wait for not ready */ 1146 wtsoft(sc, sc->regs.BUSY, 0); 1147 1148 /* unset request */ 1149 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1150 } 1151 splx(s); 1152 return 1; 1153 } 1154
Indexes created Thu Sep 25 02:09:54 GMT 2025