wt.c revision 1.48
1 /* $NetBSD: wt.c,v 1.48 2000/02/08 18:40:51 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 int wtprobe __P((struct device *, struct cfdata *, void *)); 165 void wtattach __P((struct device *, struct device *, void *)); 166 int wtintr __P((void *sc)); 167 168 struct cfattach wt_ca = { 169 sizeof(struct wt_softc), wtprobe, wtattach 170 }; 171 172 extern struct cfdriver wt_cd; 173 174 /* 175 * Probe for the presence of the device. 176 */ 177 int 178 wtprobe(parent, match, aux) 179 struct device *parent; 180 struct cfdata *match; 181 void *aux; 182 { 183 struct isa_attach_args *ia = aux; 184 bus_space_tag_t iot = ia->ia_iot; 185 bus_space_handle_t ioh; 186 int rv = 0; 187 188 189 /* Disallow wildcarded i/o address. */ 190 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 191 return (0); 192 193 if (ia->ia_drq < 1 || ia->ia_drq > 3) { 194 printf("wtprobe: Bad drq=%d, should be 1..3\n", ia->ia_drq); 195 return (0); 196 } 197 198 /* Map i/o space */ 199 if (bus_space_map(iot, ia->ia_iobase, AV_NPORT, 0, &ioh)) 200 return 0; 201 202 /* Try Wangtek. */ 203 if (wtreset(iot, ioh, &wtregs)) { 204 ia->ia_iosize = WT_NPORT; /* XXX misleading */ 205 rv = 1; 206 goto done; 207 } 208 209 /* Try Archive. */ 210 if (wtreset(iot, ioh, &avregs)) { 211 ia->ia_iosize = AV_NPORT; 212 rv = 1; 213 goto done; 214 } 215 216 done: 217 bus_space_unmap(iot, ioh, AV_NPORT); 218 return rv; 219 } 220 221 /* 222 * Device is found, configure it. 223 */ 224 void 225 wtattach(parent, self, aux) 226 struct device *parent, *self; 227 void *aux; 228 { 229 struct wt_softc *sc = (void *)self; 230 struct isa_attach_args *ia = aux; 231 bus_space_tag_t iot = ia->ia_iot; 232 bus_space_handle_t ioh; 233 bus_size_t maxsize; 234 235 /* Map i/o space */ 236 if (bus_space_map(iot, ia->ia_iobase, AV_NPORT, 0, &ioh)) { 237 printf(": can't map i/o space\n"); 238 return; 239 } 240 241 sc->sc_iot = iot; 242 sc->sc_ioh = ioh; 243 sc->sc_ic = ia->ia_ic; 244 245 /* Try Wangtek. */ 246 if (wtreset(iot, ioh, &wtregs)) { 247 sc->type = WANGTEK; 248 bcopy(&wtregs, &sc->regs, sizeof(sc->regs)); 249 printf(": type <Wangtek>\n"); 250 goto ok; 251 } 252 253 /* Try Archive. */ 254 if (wtreset(iot, ioh, &avregs)) { 255 sc->type = ARCHIVE; 256 bcopy(&avregs, &sc->regs, sizeof(sc->regs)); 257 printf(": type <Archive>\n"); 258 /* Reset DMA. */ 259 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 260 goto ok; 261 } 262 263 /* what happened? */ 264 printf("%s: lost controller\n", self->dv_xname); 265 return; 266 267 ok: 268 sc->flags = TPSTART; /* tape is rewound */ 269 sc->dens = -1; /* unknown density */ 270 271 sc->chan = ia->ia_drq; 272 273 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->chan)) < MAXPHYS) { 274 printf("%s: max DMA size %lu is less than required %d\n", 275 sc->sc_dev.dv_xname, (u_long)maxsize, MAXPHYS); 276 return; 277 } 278 279 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 280 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 281 printf("%s: can't set up ISA DMA map\n", 282 sc->sc_dev.dv_xname); 283 return; 284 } 285 286 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 287 IPL_BIO, wtintr, sc); 288 } 289 290 int 291 wtdump(dev, blkno, va, size) 292 dev_t dev; 293 daddr_t blkno; 294 caddr_t va; 295 size_t size; 296 { 297 298 /* Not implemented. */ 299 return ENXIO; 300 } 301 302 int 303 wtsize(dev) 304 dev_t dev; 305 { 306 307 /* Not implemented. */ 308 return -1; 309 } 310 311 /* 312 * Open routine, called on every device open. 313 */ 314 int 315 wtopen(dev, flag, mode, p) 316 dev_t dev; 317 int flag; 318 int mode; 319 struct proc *p; 320 { 321 int unit = minor(dev) & T_UNIT; 322 struct wt_softc *sc; 323 int error; 324 325 if (unit >= wt_cd.cd_ndevs) 326 return ENXIO; 327 sc = wt_cd.cd_devs[unit]; 328 if (!sc) 329 return ENXIO; 330 331 /* Check that device is not in use */ 332 if (sc->flags & TPINUSE) 333 return EBUSY; 334 335 /* If the tape is in rewound state, check the status and set density. */ 336 if (sc->flags & TPSTART) { 337 /* If rewind is going on, wait */ 338 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 339 return error; 340 341 /* Check the controller status */ 342 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 343 /* Bad status, reset the controller. */ 344 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 345 return EIO; 346 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 347 return EIO; 348 } 349 350 /* Set up tape density. */ 351 if (sc->dens != (minor(dev) & WT_DENSEL)) { 352 int d = 0; 353 354 switch (minor(dev) & WT_DENSEL) { 355 case WT_DENSDFLT: 356 default: 357 break; /* default density */ 358 case WT_QIC11: 359 d = QIC_FMT11; break; /* minor 010 */ 360 case WT_QIC24: 361 d = QIC_FMT24; break; /* minor 020 */ 362 case WT_QIC120: 363 d = QIC_FMT120; break; /* minor 030 */ 364 case WT_QIC150: 365 d = QIC_FMT150; break; /* minor 040 */ 366 case WT_QIC300: 367 d = QIC_FMT300; break; /* minor 050 */ 368 case WT_QIC600: 369 d = QIC_FMT600; break; /* minor 060 */ 370 } 371 if (d) { 372 /* Change tape density. */ 373 if (!wtcmd(sc, d)) 374 return EIO; 375 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 376 return EIO; 377 378 /* Check the status of the controller. */ 379 if (sc->error & TP_ILL) { 380 printf("%s: invalid tape density\n", 381 sc->sc_dev.dv_xname); 382 return ENODEV; 383 } 384 } 385 sc->dens = minor(dev) & WT_DENSEL; 386 } 387 sc->flags &= ~TPSTART; 388 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 389 return ENXIO; 390 391 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 392 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 393 394 sc->flags = TPINUSE; 395 if (flag & FREAD) 396 sc->flags |= TPREAD; 397 if (flag & FWRITE) 398 sc->flags |= TPWRITE; 399 return 0; 400 } 401 402 /* 403 * Close routine, called on last device close. 404 */ 405 int 406 wtclose(dev, flags, mode, p) 407 dev_t dev; 408 int flags; 409 int mode; 410 struct proc *p; 411 { 412 int unit = minor(dev) & T_UNIT; 413 struct wt_softc *sc = wt_cd.cd_devs[unit]; 414 415 /* If rewind is pending, do nothing */ 416 if (sc->flags & TPREW) 417 goto done; 418 419 /* If seek forward is pending and no rewind on close, do nothing */ 420 if (sc->flags & TPRMARK) { 421 if (minor(dev) & T_NOREWIND) 422 goto done; 423 424 /* If read file mark is going on, wait */ 425 wtwait(sc, 0, "wtrfm"); 426 } 427 428 if (sc->flags & TPWANY) { 429 /* Tape was written. Write file mark. */ 430 wtwritefm(sc); 431 } 432 433 if ((minor(dev) & T_NOREWIND) == 0) { 434 /* Rewind to beginning of tape. */ 435 /* Don't wait until rewind, though. */ 436 wtrewind(sc); 437 goto done; 438 } 439 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 440 /* Space forward to after next file mark if no writing done. */ 441 /* Don't wait for completion. */ 442 wtreadfm(sc); 443 } 444 445 done: 446 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 447 free(sc->buf, M_TEMP); 448 return 0; 449 } 450 451 /* 452 * Ioctl routine. Compatible with BSD ioctls. 453 * Direct QIC-02 commands ERASE and RETENSION added. 454 * There are three possible ioctls: 455 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 456 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 457 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 458 */ 459 int 460 wtioctl(dev, cmd, addr, flag, p) 461 dev_t dev; 462 u_long cmd; 463 caddr_t addr; 464 int flag; 465 struct proc *p; 466 { 467 int unit = minor(dev) & T_UNIT; 468 struct wt_softc *sc = wt_cd.cd_devs[unit]; 469 int error, count, op; 470 471 switch (cmd) { 472 default: 473 return EINVAL; 474 case WTQICMD: /* direct QIC command */ 475 op = *(int *)addr; 476 switch (op) { 477 default: 478 return EINVAL; 479 case QIC_ERASE: /* erase the whole tape */ 480 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 481 return EACCES; 482 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 483 return error; 484 break; 485 case QIC_RETENS: /* retension the tape */ 486 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 487 return error; 488 break; 489 } 490 /* Both ERASE and RETENS operations work like REWIND. */ 491 /* Simulate the rewind operation here. */ 492 sc->flags &= ~(TPRO | TPWO | TPVOL); 493 if (!wtcmd(sc, op)) 494 return EIO; 495 sc->flags |= TPSTART | TPREW; 496 if (op == QIC_ERASE) 497 sc->flags |= TPWANY; 498 wtclock(sc); 499 return 0; 500 case MTIOCIEOT: /* ignore EOT errors */ 501 case MTIOCEEOT: /* enable EOT errors */ 502 return 0; 503 case MTIOCGET: 504 ((struct mtget*)addr)->mt_type = 505 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 506 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 507 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 508 ((struct mtget*)addr)->mt_resid = 0; 509 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 510 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 511 return 0; 512 case MTIOCTOP: 513 break; 514 } 515 516 switch ((short)((struct mtop*)addr)->mt_op) { 517 default: 518 #if 0 519 case MTFSR: /* forward space record */ 520 case MTBSR: /* backward space record */ 521 case MTBSF: /* backward space file */ 522 #endif 523 return EINVAL; 524 case MTNOP: /* no operation, sets status only */ 525 case MTCACHE: /* enable controller cache */ 526 case MTNOCACHE: /* disable controller cache */ 527 return 0; 528 case MTREW: /* rewind */ 529 case MTOFFL: /* rewind and put the drive offline */ 530 if (sc->flags & TPREW) /* rewind is running */ 531 return 0; 532 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 533 return error; 534 wtrewind(sc); 535 return 0; 536 case MTFSF: /* forward space file */ 537 for (count = ((struct mtop*)addr)->mt_count; count > 0; 538 --count) { 539 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 540 return error; 541 if ((error = wtreadfm(sc)) != 0) 542 return error; 543 } 544 return 0; 545 case MTWEOF: /* write an end-of-file record */ 546 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 547 return EACCES; 548 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 549 return error; 550 if ((error = wtwritefm(sc)) != 0) 551 return error; 552 return 0; 553 } 554 555 #ifdef DIAGNOSTIC 556 panic("wtioctl: impossible"); 557 #endif 558 } 559 560 /* 561 * Strategy routine. 562 */ 563 void 564 wtstrategy(bp) 565 struct buf *bp; 566 { 567 int unit = minor(bp->b_dev) & T_UNIT; 568 struct wt_softc *sc = wt_cd.cd_devs[unit]; 569 int s; 570 571 bp->b_resid = bp->b_bcount; 572 573 /* at file marks and end of tape, we just return '0 bytes available' */ 574 if (sc->flags & TPVOL) 575 goto xit; 576 577 if (bp->b_flags & B_READ) { 578 /* Check read access and no previous write to this tape. */ 579 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 580 goto errxit; 581 582 /* For now, we assume that all data will be copied out */ 583 /* If read command outstanding, just skip down */ 584 if ((sc->flags & TPRO) == 0) { 585 if (!wtsense(sc, 1, TP_WRP)) { 586 /* Clear status. */ 587 goto errxit; 588 } 589 if (!wtcmd(sc, QIC_RDDATA)) { 590 /* Set read mode. */ 591 wtsense(sc, 1, TP_WRP); 592 goto errxit; 593 } 594 sc->flags |= TPRO | TPRANY; 595 } 596 } else { 597 /* Check write access and write protection. */ 598 /* No previous read from this tape allowed. */ 599 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 600 goto errxit; 601 602 /* If write command outstanding, just skip down */ 603 if ((sc->flags & TPWO) == 0) { 604 if (!wtsense(sc, 1, 0)) { 605 /* Clear status. */ 606 goto errxit; 607 } 608 if (!wtcmd(sc, QIC_WRTDATA)) { 609 /* Set write mode. */ 610 wtsense(sc, 1, 0); 611 goto errxit; 612 } 613 sc->flags |= TPWO | TPWANY; 614 } 615 } 616 617 if (bp->b_bcount == 0) 618 goto xit; 619 620 sc->flags &= ~TPEXCEP; 621 s = splbio(); 622 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 623 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 624 bp->b_resid -= sc->dmacount; 625 } 626 splx(s); 627 628 if (sc->flags & TPEXCEP) { 629 errxit: 630 bp->b_flags |= B_ERROR; 631 bp->b_error = EIO; 632 } 633 xit: 634 biodone(bp); 635 return; 636 } 637 638 int 639 wtread(dev, uio, flags) 640 dev_t dev; 641 struct uio *uio; 642 int flags; 643 { 644 645 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 646 } 647 648 int 649 wtwrite(dev, uio, flags) 650 dev_t dev; 651 struct uio *uio; 652 int flags; 653 { 654 655 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 656 } 657 658 /* 659 * Interrupt routine. 660 */ 661 int 662 wtintr(arg) 663 void *arg; 664 { 665 struct wt_softc *sc = arg; 666 u_char x; 667 668 /* get status */ 669 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 670 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 671 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 672 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 673 WTDBPRINT(("busy\n")); 674 return 0; /* device is busy */ 675 } 676 677 /* 678 * Check if rewind finished. 679 */ 680 if (sc->flags & TPREW) { 681 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 682 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 683 "rewind busy?\n" : "rewind finished\n")); 684 sc->flags &= ~TPREW; /* rewind finished */ 685 wtsense(sc, 1, TP_WRP); 686 wakeup((caddr_t)sc); 687 return 1; 688 } 689 690 /* 691 * Check if writing/reading of file mark finished. 692 */ 693 if (sc->flags & (TPRMARK | TPWMARK)) { 694 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 695 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 696 "marker r/w busy?\n" : "marker r/w finished\n")); 697 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 698 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 699 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 700 wakeup((caddr_t)sc); 701 return 1; 702 } 703 704 /* 705 * Do we started any i/o? If no, just return. 706 */ 707 if ((sc->flags & TPACTIVE) == 0) { 708 WTDBPRINT(("unexpected interrupt\n")); 709 return 0; 710 } 711 sc->flags &= ~TPACTIVE; 712 sc->dmacount += sc->bsize; /* increment counter */ 713 714 /* 715 * Clean up dma. 716 */ 717 if ((sc->dmaflags & DMAMODE_READ) && 718 (sc->dmatotal - sc->dmacount) < sc->bsize) { 719 /* If reading short block, copy the internal buffer 720 * to the user memory. */ 721 isa_dmadone(sc->sc_ic, sc->chan); 722 bcopy(sc->buf, sc->dmavaddr, sc->dmatotal - sc->dmacount); 723 } else 724 isa_dmadone(sc->sc_ic, sc->chan); 725 726 /* 727 * On exception, check for end of file and end of volume. 728 */ 729 if ((x & sc->regs.NOEXCEP) == 0) { 730 WTDBPRINT(("i/o exception\n")); 731 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 732 if (sc->error & (TP_EOM | TP_FIL)) 733 sc->flags |= TPVOL; /* end of file */ 734 else 735 sc->flags |= TPEXCEP; /* i/o error */ 736 wakeup((caddr_t)sc); 737 return 1; 738 } 739 740 if (sc->dmacount < sc->dmatotal) { 741 /* Continue I/O. */ 742 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 743 wtdma(sc); 744 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 745 return 1; 746 } 747 if (sc->dmacount > sc->dmatotal) /* short last block */ 748 sc->dmacount = sc->dmatotal; 749 /* Wake up user level. */ 750 wakeup((caddr_t)sc); 751 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 752 return 1; 753 } 754 755 /* start the rewind operation */ 756 void 757 wtrewind(sc) 758 struct wt_softc *sc; 759 { 760 int rwmode = sc->flags & (TPRO | TPWO); 761 762 sc->flags &= ~(TPRO | TPWO | TPVOL); 763 /* 764 * Wangtek strictly follows QIC-02 standard: 765 * clearing ONLINE in read/write modes causes rewind. 766 * REWIND command is not allowed in read/write mode 767 * and gives `illegal command' error. 768 */ 769 if (sc->type == WANGTEK && rwmode) { 770 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 771 } else if (!wtcmd(sc, QIC_REWIND)) 772 return; 773 sc->flags |= TPSTART | TPREW; 774 wtclock(sc); 775 } 776 777 /* 778 * Start the `read marker' operation. 779 */ 780 int 781 wtreadfm(sc) 782 struct wt_softc *sc; 783 { 784 785 sc->flags &= ~(TPRO | TPWO | TPVOL); 786 if (!wtcmd(sc, QIC_READFM)) { 787 wtsense(sc, 1, TP_WRP); 788 return EIO; 789 } 790 sc->flags |= TPRMARK | TPRANY; 791 wtclock(sc); 792 /* Don't wait for completion here. */ 793 return 0; 794 } 795 796 /* 797 * Write marker to the tape. 798 */ 799 int 800 wtwritefm(sc) 801 struct wt_softc *sc; 802 { 803 804 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 805 sc->flags &= ~(TPRO | TPWO); 806 if (!wtcmd(sc, QIC_WRITEFM)) { 807 wtsense(sc, 1, 0); 808 return EIO; 809 } 810 sc->flags |= TPWMARK | TPWANY; 811 wtclock(sc); 812 return wtwait(sc, 0, "wtwfm"); 813 } 814 815 /* 816 * While controller status & mask == bits continue waiting. 817 */ 818 u_char 819 wtsoft(sc, mask, bits) 820 struct wt_softc *sc; 821 int mask, bits; 822 { 823 bus_space_tag_t iot = sc->sc_iot; 824 bus_space_handle_t ioh = sc->sc_ioh; 825 u_char x; 826 int i; 827 828 829 /* Poll status port, waiting for specified bits. */ 830 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 831 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 832 if ((x & mask) != bits) 833 return x; 834 delay(1); 835 } 836 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 837 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 838 if ((x & mask) != bits) 839 return x; 840 delay(100); 841 } 842 for (;;) { /* forever */ 843 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 844 if ((x & mask) != bits) 845 return x; 846 tsleep((caddr_t)wtsoft, WTPRI, "wtsoft", 1); 847 } 848 } 849 850 /* 851 * Execute QIC command. 852 */ 853 int 854 wtcmd(sc, cmd) 855 struct wt_softc *sc; 856 int cmd; 857 { 858 bus_space_tag_t iot = sc->sc_iot; 859 bus_space_handle_t ioh = sc->sc_ioh; 860 u_char x; 861 int s; 862 863 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 864 s = splbio(); 865 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 866 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 867 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 868 splx(s); 869 return 0; 870 } 871 872 /* output the command */ 873 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 874 875 /* set request */ 876 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 877 sc->regs.REQUEST | sc->regs.ONLINE); 878 879 /* wait for ready */ 880 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 881 882 /* reset request */ 883 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 884 sc->regs.IEN | sc->regs.ONLINE); 885 886 /* wait for not ready */ 887 wtsoft(sc, sc->regs.BUSY, 0); 888 splx(s); 889 return 1; 890 } 891 892 /* wait for the end of i/o, seeking marker or rewind operation */ 893 int 894 wtwait(sc, catch, msg) 895 struct wt_softc *sc; 896 int catch; 897 char *msg; 898 { 899 int error; 900 901 WTDBPRINT(("wtwait() `%s'\n", msg)); 902 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 903 if ((error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) != 0) 904 return error; 905 return 0; 906 } 907 908 /* initialize dma for the i/o operation */ 909 void 910 wtdma(sc) 911 struct wt_softc *sc; 912 { 913 bus_space_tag_t iot = sc->sc_iot; 914 bus_space_handle_t ioh = sc->sc_ioh; 915 916 sc->flags |= TPACTIVE; 917 wtclock(sc); 918 919 if (sc->type == ARCHIVE) { 920 /* Set DMA. */ 921 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 922 } 923 924 if ((sc->dmaflags & DMAMODE_READ) && 925 (sc->dmatotal - sc->dmacount) < sc->bsize) { 926 /* Reading short block; do it through the internal buffer. */ 927 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 928 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 929 } else 930 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 931 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 932 } 933 934 /* start i/o operation */ 935 int 936 wtstart(sc, flag, vaddr, len) 937 struct wt_softc *sc; 938 int flag; 939 void *vaddr; 940 size_t len; 941 { 942 u_char x; 943 944 WTDBPRINT(("wtstart()\n")); 945 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 946 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 947 if ((x & sc->regs.NOEXCEP) == 0) { 948 sc->flags |= TPEXCEP; /* error */ 949 return 0; 950 } 951 sc->flags &= ~TPEXCEP; /* clear exception flag */ 952 sc->dmavaddr = vaddr; 953 sc->dmatotal = len; 954 sc->dmacount = 0; 955 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 956 wtdma(sc); 957 return 1; 958 } 959 960 /* 961 * Start timer. 962 */ 963 void 964 wtclock(sc) 965 struct wt_softc *sc; 966 { 967 968 if (sc->flags & TPTIMER) 969 return; 970 sc->flags |= TPTIMER; 971 /* 972 * Some controllers seem to lose dma interrupts too often. To make the 973 * tape stream we need 1 tick timeout. 974 */ 975 timeout(wttimer, sc, (sc->flags & TPACTIVE) ? 1 : hz); 976 } 977 978 /* 979 * Simulate an interrupt periodically while i/o is going. 980 * This is necessary in case interrupts get eaten due to 981 * multiple devices on a single IRQ line. 982 */ 983 void 984 wttimer(arg) 985 void *arg; 986 { 987 register struct wt_softc *sc = (struct wt_softc *)arg; 988 int s; 989 u_char status; 990 991 sc->flags &= ~TPTIMER; 992 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 993 return; 994 995 /* If i/o going, simulate interrupt. */ 996 s = splbio(); 997 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 998 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 999 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 1000 WTDBPRINT(("wttimer() -- ")); 1001 wtintr(sc); 1002 } 1003 splx(s); 1004 1005 /* Restart timer if i/o pending. */ 1006 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1007 wtclock(sc); 1008 } 1009 1010 /* 1011 * Perform QIC-02 and QIC-36 compatible reset sequence. 1012 */ 1013 int 1014 wtreset(iot, ioh, regs) 1015 bus_space_tag_t iot; 1016 bus_space_handle_t ioh; 1017 struct wtregs *regs; 1018 { 1019 u_char x; 1020 int i; 1021 1022 /* send reset */ 1023 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1024 delay(30); 1025 /* turn off reset */ 1026 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1027 delay(30); 1028 1029 /* Read the controller status. */ 1030 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1031 if (x == 0xff) /* no port at this address? */ 1032 return 0; 1033 1034 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1035 for (i = 0; i < 3000; ++i) { 1036 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1037 break; 1038 delay(1000); 1039 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1040 } 1041 return (x & regs->RESETMASK) == regs->RESETVAL; 1042 } 1043 1044 /* 1045 * Get controller status information. Return 0 if user i/o request should 1046 * receive an i/o error code. 1047 */ 1048 int 1049 wtsense(sc, verbose, ignore) 1050 struct wt_softc *sc; 1051 int verbose, ignore; 1052 { 1053 char *msg = 0; 1054 int error; 1055 1056 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1057 sc->flags &= ~(TPRO | TPWO); 1058 if (!wtstatus(sc)) 1059 return 0; 1060 if ((sc->error & TP_ST0) == 0) 1061 sc->error &= ~TP_ST0MASK; 1062 if ((sc->error & TP_ST1) == 0) 1063 sc->error &= ~TP_ST1MASK; 1064 sc->error &= ~ignore; /* ignore certain errors */ 1065 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1066 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1067 if (!error) 1068 return 1; 1069 if (!verbose) 1070 return 0; 1071 1072 /* lifted from tdriver.c from Wangtek */ 1073 if (error & TP_USL) 1074 msg = "Drive not online"; 1075 else if (error & TP_CNI) 1076 msg = "No cartridge"; 1077 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1078 msg = "Tape is write protected"; 1079 sc->flags |= TPWP; 1080 } else if (error & TP_FIL) 1081 msg = 0 /*"Filemark detected"*/; 1082 else if (error & TP_EOM) 1083 msg = 0 /*"End of tape"*/; 1084 else if (error & TP_BNL) 1085 msg = "Block not located"; 1086 else if (error & TP_UDA) 1087 msg = "Unrecoverable data error"; 1088 else if (error & TP_NDT) 1089 msg = "No data detected"; 1090 else if (error & TP_ILL) 1091 msg = "Illegal command"; 1092 if (msg) 1093 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 1094 return 0; 1095 } 1096 1097 /* 1098 * Get controller status information. 1099 */ 1100 int 1101 wtstatus(sc) 1102 struct wt_softc *sc; 1103 { 1104 bus_space_tag_t iot = sc->sc_iot; 1105 bus_space_handle_t ioh = sc->sc_ioh; 1106 char *p; 1107 int s; 1108 1109 s = splbio(); 1110 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1111 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1112 /* send `read status' command */ 1113 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1114 1115 /* set request */ 1116 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1117 sc->regs.REQUEST | sc->regs.ONLINE); 1118 1119 /* wait for ready */ 1120 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1121 /* reset request */ 1122 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1123 1124 /* wait for not ready */ 1125 wtsoft(sc, sc->regs.BUSY, 0); 1126 1127 p = (char *)&sc->error; 1128 while (p < (char *)&sc->error + 6) { 1129 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1130 sc->regs.BUSY | sc->regs.NOEXCEP); 1131 1132 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1133 splx(s); 1134 return 0; 1135 } 1136 1137 /* read status byte */ 1138 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1139 1140 /* set request */ 1141 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1142 sc->regs.REQUEST | sc->regs.ONLINE); 1143 1144 /* wait for not ready */ 1145 wtsoft(sc, sc->regs.BUSY, 0); 1146 1147 /* unset request */ 1148 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1149 } 1150 splx(s); 1151 return 1; 1152 } 1153
Indexes created Wed Sep 24 05:09:52 GMT 2025