wt.c revision 1.43
1 /* $NetBSD: wt.c,v 1.43 1998/01/20 13:08:33 drochner 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; 125 126 enum wttype type; /* type of controller */ 127 int chan; /* dma channel number, 1..3 */ 128 int flags; /* state of tape drive */ 129 unsigned dens; /* tape density */ 130 int bsize; /* tape block size */ 131 void *buf; /* internal i/o buffer */ 132 133 void *dmavaddr; /* virtual address of dma i/o buffer */ 134 size_t dmatotal; /* size of i/o buffer */ 135 int dmaflags; /* i/o direction */ 136 size_t dmacount; /* resulting length of dma i/o */ 137 138 u_short error; /* code for error encountered */ 139 u_short ercnt; /* number of error blocks */ 140 u_short urcnt; /* number of underruns */ 141 142 struct wtregs regs; 143 }; 144 145 /* XXX: These don't belong here really */ 146 cdev_decl(wt); 147 bdev_decl(wt); 148 149 int wtwait __P((struct wt_softc *sc, int catch, char *msg)); 150 int wtcmd __P((struct wt_softc *sc, int cmd)); 151 int wtstart __P((struct wt_softc *sc, int flag, void *vaddr, size_t len)); 152 void wtdma __P((struct wt_softc *sc)); 153 void wttimer __P((void *arg)); 154 void wtclock __P((struct wt_softc *sc)); 155 int wtreset __P((bus_space_tag_t, bus_space_handle_t, struct wtregs *)); 156 int wtsense __P((struct wt_softc *sc, int verbose, int ignore)); 157 int wtstatus __P((struct wt_softc *sc)); 158 void wtrewind __P((struct wt_softc *sc)); 159 int wtreadfm __P((struct wt_softc *sc)); 160 int wtwritefm __P((struct wt_softc *sc)); 161 u_char wtsoft __P((struct wt_softc *sc, int mask, int bits)); 162 163 #ifdef __BROKEN_INDIRECT_CONFIG 164 int wtprobe __P((struct device *, void *, void *)); 165 #else 166 int wtprobe __P((struct device *, struct cfdata *, void *)); 167 #endif 168 void wtattach __P((struct device *, struct device *, void *)); 169 int wtintr __P((void *sc)); 170 171 struct cfattach wt_ca = { 172 sizeof(struct wt_softc), wtprobe, wtattach 173 }; 174 175 extern struct cfdriver wt_cd; 176 177 /* 178 * Probe for the presence of the device. 179 */ 180 int 181 wtprobe(parent, match, aux) 182 struct device *parent; 183 #ifdef __BROKEN_INDIRECT_CONFIG 184 void *match; 185 #else 186 struct cfdata *match; 187 #endif 188 void *aux; 189 { 190 struct isa_attach_args *ia = aux; 191 bus_space_tag_t iot = ia->ia_iot; 192 bus_space_handle_t ioh; 193 int rv = 0; 194 195 196 /* Disallow wildcarded i/o address. */ 197 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 198 return (0); 199 200 if (ia->ia_drq < 1 || ia->ia_drq > 3) { 201 printf("wtprobe: Bad drq=%d, should be 1..3\n", ia->ia_drq); 202 return (0); 203 } 204 205 /* Map i/o space */ 206 if (bus_space_map(iot, ia->ia_iobase, AV_NPORT, 0, &ioh)) 207 return 0; 208 209 /* Try Wangtek. */ 210 if (wtreset(iot, ioh, &wtregs)) { 211 ia->ia_iosize = WT_NPORT; /* XXX misleading */ 212 rv = 1; 213 goto done; 214 } 215 216 /* Try Archive. */ 217 if (wtreset(iot, ioh, &avregs)) { 218 ia->ia_iosize = AV_NPORT; 219 rv = 1; 220 goto done; 221 } 222 223 done: 224 bus_space_unmap(iot, ioh, AV_NPORT); 225 return rv; 226 } 227 228 /* 229 * Device is found, configure it. 230 */ 231 void 232 wtattach(parent, self, aux) 233 struct device *parent, *self; 234 void *aux; 235 { 236 struct wt_softc *sc = (void *)self; 237 struct isa_attach_args *ia = aux; 238 bus_space_tag_t iot = ia->ia_iot; 239 bus_space_handle_t ioh; 240 241 /* Map i/o space */ 242 if (bus_space_map(iot, ia->ia_iobase, AV_NPORT, 0, &ioh)) { 243 printf(": can't map i/o space\n"); 244 return; 245 } 246 247 sc->sc_iot = iot; 248 sc->sc_ioh = ioh; 249 250 /* Try Wangtek. */ 251 if (wtreset(iot, ioh, &wtregs)) { 252 sc->type = WANGTEK; 253 bcopy(&wtregs, &sc->regs, sizeof(sc->regs)); 254 printf(": type <Wangtek>\n"); 255 goto ok; 256 } 257 258 /* Try Archive. */ 259 if (wtreset(iot, ioh, &avregs)) { 260 sc->type = ARCHIVE; 261 bcopy(&avregs, &sc->regs, sizeof(sc->regs)); 262 printf(": type <Archive>\n"); 263 /* Reset DMA. */ 264 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 265 goto ok; 266 } 267 268 /* what happened? */ 269 printf("%s: lost controller\n", self->dv_xname); 270 return; 271 272 ok: 273 sc->flags = TPSTART; /* tape is rewound */ 274 sc->dens = -1; /* unknown density */ 275 276 sc->chan = ia->ia_drq; 277 278 if (isa_dmamap_create(parent, sc->chan, MAXPHYS, 279 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 280 printf("%s: can't set up ISA DMA map\n", 281 sc->sc_dev.dv_xname); 282 return; 283 } 284 285 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 286 IPL_BIO, wtintr, sc); 287 } 288 289 int 290 wtdump(dev, blkno, va, size) 291 dev_t dev; 292 daddr_t blkno; 293 caddr_t va; 294 size_t size; 295 { 296 297 /* Not implemented. */ 298 return ENXIO; 299 } 300 301 int 302 wtsize(dev) 303 dev_t dev; 304 { 305 306 /* Not implemented. */ 307 return -1; 308 } 309 310 /* 311 * Open routine, called on every device open. 312 */ 313 int 314 wtopen(dev, flag, mode, p) 315 dev_t dev; 316 int flag; 317 int mode; 318 struct proc *p; 319 { 320 int unit = minor(dev) & T_UNIT; 321 struct wt_softc *sc; 322 int error; 323 324 if (unit >= wt_cd.cd_ndevs) 325 return ENXIO; 326 sc = wt_cd.cd_devs[unit]; 327 if (!sc) 328 return ENXIO; 329 330 /* Check that device is not in use */ 331 if (sc->flags & TPINUSE) 332 return EBUSY; 333 334 /* If the tape is in rewound state, check the status and set density. */ 335 if (sc->flags & TPSTART) { 336 /* If rewind is going on, wait */ 337 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 338 return error; 339 340 /* Check the controller status */ 341 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 342 /* Bad status, reset the controller. */ 343 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 344 return EIO; 345 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 346 return EIO; 347 } 348 349 /* Set up tape density. */ 350 if (sc->dens != (minor(dev) & WT_DENSEL)) { 351 int d = 0; 352 353 switch (minor(dev) & WT_DENSEL) { 354 case WT_DENSDFLT: 355 default: 356 break; /* default density */ 357 case WT_QIC11: 358 d = QIC_FMT11; break; /* minor 010 */ 359 case WT_QIC24: 360 d = QIC_FMT24; break; /* minor 020 */ 361 case WT_QIC120: 362 d = QIC_FMT120; break; /* minor 030 */ 363 case WT_QIC150: 364 d = QIC_FMT150; break; /* minor 040 */ 365 case WT_QIC300: 366 d = QIC_FMT300; break; /* minor 050 */ 367 case WT_QIC600: 368 d = QIC_FMT600; break; /* minor 060 */ 369 } 370 if (d) { 371 /* Change tape density. */ 372 if (!wtcmd(sc, d)) 373 return EIO; 374 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 375 return EIO; 376 377 /* Check the status of the controller. */ 378 if (sc->error & TP_ILL) { 379 printf("%s: invalid tape density\n", 380 sc->sc_dev.dv_xname); 381 return ENODEV; 382 } 383 } 384 sc->dens = minor(dev) & WT_DENSEL; 385 } 386 sc->flags &= ~TPSTART; 387 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 388 return ENXIO; 389 390 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 391 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 392 393 sc->flags = TPINUSE; 394 if (flag & FREAD) 395 sc->flags |= TPREAD; 396 if (flag & FWRITE) 397 sc->flags |= TPWRITE; 398 return 0; 399 } 400 401 /* 402 * Close routine, called on last device close. 403 */ 404 int 405 wtclose(dev, flags, mode, p) 406 dev_t dev; 407 int flags; 408 int mode; 409 struct proc *p; 410 { 411 int unit = minor(dev) & T_UNIT; 412 struct wt_softc *sc = wt_cd.cd_devs[unit]; 413 414 /* If rewind is pending, do nothing */ 415 if (sc->flags & TPREW) 416 goto done; 417 418 /* If seek forward is pending and no rewind on close, do nothing */ 419 if (sc->flags & TPRMARK) { 420 if (minor(dev) & T_NOREWIND) 421 goto done; 422 423 /* If read file mark is going on, wait */ 424 wtwait(sc, 0, "wtrfm"); 425 } 426 427 if (sc->flags & TPWANY) { 428 /* Tape was written. Write file mark. */ 429 wtwritefm(sc); 430 } 431 432 if ((minor(dev) & T_NOREWIND) == 0) { 433 /* Rewind to beginning of tape. */ 434 /* Don't wait until rewind, though. */ 435 wtrewind(sc); 436 goto done; 437 } 438 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 439 /* Space forward to after next file mark if no writing done. */ 440 /* Don't wait for completion. */ 441 wtreadfm(sc); 442 } 443 444 done: 445 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 446 free(sc->buf, M_TEMP); 447 return 0; 448 } 449 450 /* 451 * Ioctl routine. Compatible with BSD ioctls. 452 * Direct QIC-02 commands ERASE and RETENSION added. 453 * There are three possible ioctls: 454 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 455 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 456 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 457 */ 458 int 459 wtioctl(dev, cmd, addr, flag, p) 460 dev_t dev; 461 u_long cmd; 462 caddr_t addr; 463 int flag; 464 struct proc *p; 465 { 466 int unit = minor(dev) & T_UNIT; 467 struct wt_softc *sc = wt_cd.cd_devs[unit]; 468 int error, count, op; 469 470 switch (cmd) { 471 default: 472 return EINVAL; 473 case WTQICMD: /* direct QIC command */ 474 op = *(int *)addr; 475 switch (op) { 476 default: 477 return EINVAL; 478 case QIC_ERASE: /* erase the whole tape */ 479 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 480 return EACCES; 481 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 482 return error; 483 break; 484 case QIC_RETENS: /* retension the tape */ 485 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 486 return error; 487 break; 488 } 489 /* Both ERASE and RETENS operations work like REWIND. */ 490 /* Simulate the rewind operation here. */ 491 sc->flags &= ~(TPRO | TPWO | TPVOL); 492 if (!wtcmd(sc, op)) 493 return EIO; 494 sc->flags |= TPSTART | TPREW; 495 if (op == QIC_ERASE) 496 sc->flags |= TPWANY; 497 wtclock(sc); 498 return 0; 499 case MTIOCIEOT: /* ignore EOT errors */ 500 case MTIOCEEOT: /* enable EOT errors */ 501 return 0; 502 case MTIOCGET: 503 ((struct mtget*)addr)->mt_type = 504 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 505 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 506 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 507 ((struct mtget*)addr)->mt_resid = 0; 508 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 509 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 510 return 0; 511 case MTIOCTOP: 512 break; 513 } 514 515 switch ((short)((struct mtop*)addr)->mt_op) { 516 default: 517 #if 0 518 case MTFSR: /* forward space record */ 519 case MTBSR: /* backward space record */ 520 case MTBSF: /* backward space file */ 521 #endif 522 return EINVAL; 523 case MTNOP: /* no operation, sets status only */ 524 case MTCACHE: /* enable controller cache */ 525 case MTNOCACHE: /* disable controller cache */ 526 return 0; 527 case MTREW: /* rewind */ 528 case MTOFFL: /* rewind and put the drive offline */ 529 if (sc->flags & TPREW) /* rewind is running */ 530 return 0; 531 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 532 return error; 533 wtrewind(sc); 534 return 0; 535 case MTFSF: /* forward space file */ 536 for (count = ((struct mtop*)addr)->mt_count; count > 0; 537 --count) { 538 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 539 return error; 540 if ((error = wtreadfm(sc)) != 0) 541 return error; 542 } 543 return 0; 544 case MTWEOF: /* write an end-of-file record */ 545 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 546 return EACCES; 547 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 548 return error; 549 if ((error = wtwritefm(sc)) != 0) 550 return error; 551 return 0; 552 } 553 554 #ifdef DIAGNOSTIC 555 panic("wtioctl: impossible"); 556 #endif 557 } 558 559 /* 560 * Strategy routine. 561 */ 562 void 563 wtstrategy(bp) 564 struct buf *bp; 565 { 566 int unit = minor(bp->b_dev) & T_UNIT; 567 struct wt_softc *sc = wt_cd.cd_devs[unit]; 568 int s; 569 570 bp->b_resid = bp->b_bcount; 571 572 /* at file marks and end of tape, we just return '0 bytes available' */ 573 if (sc->flags & TPVOL) 574 goto xit; 575 576 if (bp->b_flags & B_READ) { 577 /* Check read access and no previous write to this tape. */ 578 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 579 goto errxit; 580 581 /* For now, we assume that all data will be copied out */ 582 /* If read command outstanding, just skip down */ 583 if ((sc->flags & TPRO) == 0) { 584 if (!wtsense(sc, 1, TP_WRP)) { 585 /* Clear status. */ 586 goto errxit; 587 } 588 if (!wtcmd(sc, QIC_RDDATA)) { 589 /* Set read mode. */ 590 wtsense(sc, 1, TP_WRP); 591 goto errxit; 592 } 593 sc->flags |= TPRO | TPRANY; 594 } 595 } else { 596 /* Check write access and write protection. */ 597 /* No previous read from this tape allowed. */ 598 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 599 goto errxit; 600 601 /* If write command outstanding, just skip down */ 602 if ((sc->flags & TPWO) == 0) { 603 if (!wtsense(sc, 1, 0)) { 604 /* Clear status. */ 605 goto errxit; 606 } 607 if (!wtcmd(sc, QIC_WRTDATA)) { 608 /* Set write mode. */ 609 wtsense(sc, 1, 0); 610 goto errxit; 611 } 612 sc->flags |= TPWO | TPWANY; 613 } 614 } 615 616 if (bp->b_bcount == 0) 617 goto xit; 618 619 sc->flags &= ~TPEXCEP; 620 s = splbio(); 621 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 622 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 623 bp->b_resid -= sc->dmacount; 624 } 625 splx(s); 626 627 if (sc->flags & TPEXCEP) { 628 errxit: 629 bp->b_flags |= B_ERROR; 630 bp->b_error = EIO; 631 } 632 xit: 633 biodone(bp); 634 return; 635 } 636 637 int 638 wtread(dev, uio, flags) 639 dev_t dev; 640 struct uio *uio; 641 int flags; 642 { 643 644 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 645 } 646 647 int 648 wtwrite(dev, uio, flags) 649 dev_t dev; 650 struct uio *uio; 651 int flags; 652 { 653 654 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 655 } 656 657 /* 658 * Interrupt routine. 659 */ 660 int 661 wtintr(arg) 662 void *arg; 663 { 664 struct wt_softc *sc = arg; 665 u_char x; 666 667 /* get status */ 668 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 669 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 670 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 671 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 672 WTDBPRINT(("busy\n")); 673 return 0; /* device is busy */ 674 } 675 676 /* 677 * Check if rewind finished. 678 */ 679 if (sc->flags & TPREW) { 680 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 681 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 682 "rewind busy?\n" : "rewind finished\n")); 683 sc->flags &= ~TPREW; /* rewind finished */ 684 wtsense(sc, 1, TP_WRP); 685 wakeup((caddr_t)sc); 686 return 1; 687 } 688 689 /* 690 * Check if writing/reading of file mark finished. 691 */ 692 if (sc->flags & (TPRMARK | TPWMARK)) { 693 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 694 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 695 "marker r/w busy?\n" : "marker r/w finished\n")); 696 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 697 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 698 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 699 wakeup((caddr_t)sc); 700 return 1; 701 } 702 703 /* 704 * Do we started any i/o? If no, just return. 705 */ 706 if ((sc->flags & TPACTIVE) == 0) { 707 WTDBPRINT(("unexpected interrupt\n")); 708 return 0; 709 } 710 sc->flags &= ~TPACTIVE; 711 sc->dmacount += sc->bsize; /* increment counter */ 712 713 /* 714 * Clean up dma. 715 */ 716 if ((sc->dmaflags & DMAMODE_READ) && 717 (sc->dmatotal - sc->dmacount) < sc->bsize) { 718 /* If reading short block, copy the internal buffer 719 * to the user memory. */ 720 isa_dmadone(sc->sc_dev.dv_parent, sc->chan); 721 bcopy(sc->buf, sc->dmavaddr, sc->dmatotal - sc->dmacount); 722 } else 723 isa_dmadone(sc->sc_dev.dv_parent, sc->chan); 724 725 /* 726 * On exception, check for end of file and end of volume. 727 */ 728 if ((x & sc->regs.NOEXCEP) == 0) { 729 WTDBPRINT(("i/o exception\n")); 730 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 731 if (sc->error & (TP_EOM | TP_FIL)) 732 sc->flags |= TPVOL; /* end of file */ 733 else 734 sc->flags |= TPEXCEP; /* i/o error */ 735 wakeup((caddr_t)sc); 736 return 1; 737 } 738 739 if (sc->dmacount < sc->dmatotal) { 740 /* Continue I/O. */ 741 sc->dmavaddr += sc->bsize; 742 wtdma(sc); 743 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 744 return 1; 745 } 746 if (sc->dmacount > sc->dmatotal) /* short last block */ 747 sc->dmacount = sc->dmatotal; 748 /* Wake up user level. */ 749 wakeup((caddr_t)sc); 750 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 751 return 1; 752 } 753 754 /* start the rewind operation */ 755 void 756 wtrewind(sc) 757 struct wt_softc *sc; 758 { 759 int rwmode = sc->flags & (TPRO | TPWO); 760 761 sc->flags &= ~(TPRO | TPWO | TPVOL); 762 /* 763 * Wangtek strictly follows QIC-02 standard: 764 * clearing ONLINE in read/write modes causes rewind. 765 * REWIND command is not allowed in read/write mode 766 * and gives `illegal command' error. 767 */ 768 if (sc->type == WANGTEK && rwmode) { 769 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 770 } else if (!wtcmd(sc, QIC_REWIND)) 771 return; 772 sc->flags |= TPSTART | TPREW; 773 wtclock(sc); 774 } 775 776 /* 777 * Start the `read marker' operation. 778 */ 779 int 780 wtreadfm(sc) 781 struct wt_softc *sc; 782 { 783 784 sc->flags &= ~(TPRO | TPWO | TPVOL); 785 if (!wtcmd(sc, QIC_READFM)) { 786 wtsense(sc, 1, TP_WRP); 787 return EIO; 788 } 789 sc->flags |= TPRMARK | TPRANY; 790 wtclock(sc); 791 /* Don't wait for completion here. */ 792 return 0; 793 } 794 795 /* 796 * Write marker to the tape. 797 */ 798 int 799 wtwritefm(sc) 800 struct wt_softc *sc; 801 { 802 803 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 804 sc->flags &= ~(TPRO | TPWO); 805 if (!wtcmd(sc, QIC_WRITEFM)) { 806 wtsense(sc, 1, 0); 807 return EIO; 808 } 809 sc->flags |= TPWMARK | TPWANY; 810 wtclock(sc); 811 return wtwait(sc, 0, "wtwfm"); 812 } 813 814 /* 815 * While controller status & mask == bits continue waiting. 816 */ 817 u_char 818 wtsoft(sc, mask, bits) 819 struct wt_softc *sc; 820 int mask, bits; 821 { 822 bus_space_tag_t iot = sc->sc_iot; 823 bus_space_handle_t ioh = sc->sc_ioh; 824 u_char x; 825 int i; 826 827 828 /* Poll status port, waiting for specified bits. */ 829 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 830 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 831 if ((x & mask) != bits) 832 return x; 833 delay(1); 834 } 835 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 836 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 837 if ((x & mask) != bits) 838 return x; 839 delay(100); 840 } 841 for (;;) { /* forever */ 842 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 843 if ((x & mask) != bits) 844 return x; 845 tsleep((caddr_t)wtsoft, WTPRI, "wtsoft", 1); 846 } 847 } 848 849 /* 850 * Execute QIC command. 851 */ 852 int 853 wtcmd(sc, cmd) 854 struct wt_softc *sc; 855 int cmd; 856 { 857 bus_space_tag_t iot = sc->sc_iot; 858 bus_space_handle_t ioh = sc->sc_ioh; 859 u_char x; 860 int s; 861 862 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 863 s = splbio(); 864 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 865 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 866 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 867 splx(s); 868 return 0; 869 } 870 871 /* output the command */ 872 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 873 874 /* set request */ 875 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 876 sc->regs.REQUEST | sc->regs.ONLINE); 877 878 /* wait for ready */ 879 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 880 881 /* reset request */ 882 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 883 sc->regs.IEN | sc->regs.ONLINE); 884 885 /* wait for not ready */ 886 wtsoft(sc, sc->regs.BUSY, 0); 887 splx(s); 888 return 1; 889 } 890 891 /* wait for the end of i/o, seeking marker or rewind operation */ 892 int 893 wtwait(sc, catch, msg) 894 struct wt_softc *sc; 895 int catch; 896 char *msg; 897 { 898 int error; 899 900 WTDBPRINT(("wtwait() `%s'\n", msg)); 901 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 902 if ((error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) != 0) 903 return error; 904 return 0; 905 } 906 907 /* initialize dma for the i/o operation */ 908 void 909 wtdma(sc) 910 struct wt_softc *sc; 911 { 912 bus_space_tag_t iot = sc->sc_iot; 913 bus_space_handle_t ioh = sc->sc_ioh; 914 915 sc->flags |= TPACTIVE; 916 wtclock(sc); 917 918 if (sc->type == ARCHIVE) { 919 /* Set DMA. */ 920 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 921 } 922 923 if ((sc->dmaflags & DMAMODE_READ) && 924 (sc->dmatotal - sc->dmacount) < sc->bsize) { 925 /* Reading short block; do it through the internal buffer. */ 926 isa_dmastart(sc->sc_dev.dv_parent, sc->chan, sc->buf, 927 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 928 } else 929 isa_dmastart(sc->sc_dev.dv_parent, sc->chan, sc->dmavaddr, 930 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 931 } 932 933 /* start i/o operation */ 934 int 935 wtstart(sc, flag, vaddr, len) 936 struct wt_softc *sc; 937 int flag; 938 void *vaddr; 939 size_t len; 940 { 941 u_char x; 942 943 WTDBPRINT(("wtstart()\n")); 944 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 945 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 946 if ((x & sc->regs.NOEXCEP) == 0) { 947 sc->flags |= TPEXCEP; /* error */ 948 return 0; 949 } 950 sc->flags &= ~TPEXCEP; /* clear exception flag */ 951 sc->dmavaddr = vaddr; 952 sc->dmatotal = len; 953 sc->dmacount = 0; 954 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 955 wtdma(sc); 956 return 1; 957 } 958 959 /* 960 * Start timer. 961 */ 962 void 963 wtclock(sc) 964 struct wt_softc *sc; 965 { 966 967 if (sc->flags & TPTIMER) 968 return; 969 sc->flags |= TPTIMER; 970 /* 971 * Some controllers seem to lose dma interrupts too often. To make the 972 * tape stream we need 1 tick timeout. 973 */ 974 timeout(wttimer, sc, (sc->flags & TPACTIVE) ? 1 : hz); 975 } 976 977 /* 978 * Simulate an interrupt periodically while i/o is going. 979 * This is necessary in case interrupts get eaten due to 980 * multiple devices on a single IRQ line. 981 */ 982 void 983 wttimer(arg) 984 void *arg; 985 { 986 register struct wt_softc *sc = (struct wt_softc *)arg; 987 int s; 988 u_char status; 989 990 sc->flags &= ~TPTIMER; 991 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 992 return; 993 994 /* If i/o going, simulate interrupt. */ 995 s = splbio(); 996 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 997 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 998 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 999 WTDBPRINT(("wttimer() -- ")); 1000 wtintr(sc); 1001 } 1002 splx(s); 1003 1004 /* Restart timer if i/o pending. */ 1005 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1006 wtclock(sc); 1007 } 1008 1009 /* 1010 * Perform QIC-02 and QIC-36 compatible reset sequence. 1011 */ 1012 int 1013 wtreset(iot, ioh, regs) 1014 bus_space_tag_t iot; 1015 bus_space_handle_t ioh; 1016 struct wtregs *regs; 1017 { 1018 u_char x; 1019 int i; 1020 1021 /* send reset */ 1022 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1023 delay(30); 1024 /* turn off reset */ 1025 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1026 delay(30); 1027 1028 /* Read the controller status. */ 1029 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1030 if (x == 0xff) /* no port at this address? */ 1031 return 0; 1032 1033 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1034 for (i = 0; i < 3000; ++i) { 1035 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1036 break; 1037 delay(1000); 1038 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1039 } 1040 return (x & regs->RESETMASK) == regs->RESETVAL; 1041 } 1042 1043 /* 1044 * Get controller status information. Return 0 if user i/o request should 1045 * receive an i/o error code. 1046 */ 1047 int 1048 wtsense(sc, verbose, ignore) 1049 struct wt_softc *sc; 1050 int verbose, ignore; 1051 { 1052 char *msg = 0; 1053 int error; 1054 1055 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1056 sc->flags &= ~(TPRO | TPWO); 1057 if (!wtstatus(sc)) 1058 return 0; 1059 if ((sc->error & TP_ST0) == 0) 1060 sc->error &= ~TP_ST0MASK; 1061 if ((sc->error & TP_ST1) == 0) 1062 sc->error &= ~TP_ST1MASK; 1063 sc->error &= ~ignore; /* ignore certain errors */ 1064 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1065 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1066 if (!error) 1067 return 1; 1068 if (!verbose) 1069 return 0; 1070 1071 /* lifted from tdriver.c from Wangtek */ 1072 if (error & TP_USL) 1073 msg = "Drive not online"; 1074 else if (error & TP_CNI) 1075 msg = "No cartridge"; 1076 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1077 msg = "Tape is write protected"; 1078 sc->flags |= TPWP; 1079 } else if (error & TP_FIL) 1080 msg = 0 /*"Filemark detected"*/; 1081 else if (error & TP_EOM) 1082 msg = 0 /*"End of tape"*/; 1083 else if (error & TP_BNL) 1084 msg = "Block not located"; 1085 else if (error & TP_UDA) 1086 msg = "Unrecoverable data error"; 1087 else if (error & TP_NDT) 1088 msg = "No data detected"; 1089 else if (error & TP_ILL) 1090 msg = "Illegal command"; 1091 if (msg) 1092 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 1093 return 0; 1094 } 1095 1096 /* 1097 * Get controller status information. 1098 */ 1099 int 1100 wtstatus(sc) 1101 struct wt_softc *sc; 1102 { 1103 bus_space_tag_t iot = sc->sc_iot; 1104 bus_space_handle_t ioh = sc->sc_ioh; 1105 char *p; 1106 int s; 1107 1108 s = splbio(); 1109 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1110 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1111 /* send `read status' command */ 1112 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1113 1114 /* set request */ 1115 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1116 sc->regs.REQUEST | sc->regs.ONLINE); 1117 1118 /* wait for ready */ 1119 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1120 /* reset request */ 1121 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1122 1123 /* wait for not ready */ 1124 wtsoft(sc, sc->regs.BUSY, 0); 1125 1126 p = (char *)&sc->error; 1127 while (p < (char *)&sc->error + 6) { 1128 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1129 sc->regs.BUSY | sc->regs.NOEXCEP); 1130 1131 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1132 splx(s); 1133 return 0; 1134 } 1135 1136 /* read status byte */ 1137 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1138 1139 /* set request */ 1140 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1141 sc->regs.REQUEST | sc->regs.ONLINE); 1142 1143 /* wait for not ready */ 1144 wtsoft(sc, sc->regs.BUSY, 0); 1145 1146 /* unset request */ 1147 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1148 } 1149 splx(s); 1150 return 1; 1151 } 1152
Indexes created Fri Sep 26 20:09:58 GMT 2025