wt.c revision 1.46
1 /* $NetBSD: wt.c,v 1.46 1999/01/10 21:57:19 augustss 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; 233 234 /* Map i/o space */ 235 if (bus_space_map(iot, ia->ia_iobase, AV_NPORT, 0, &ioh)) { 236 printf(": can't map i/o space\n"); 237 return; 238 } 239 240 sc->sc_iot = iot; 241 sc->sc_ioh = ioh; 242 sc->sc_ic = ia->ia_ic; 243 244 /* Try Wangtek. */ 245 if (wtreset(iot, ioh, &wtregs)) { 246 sc->type = WANGTEK; 247 bcopy(&wtregs, &sc->regs, sizeof(sc->regs)); 248 printf(": type <Wangtek>\n"); 249 goto ok; 250 } 251 252 /* Try Archive. */ 253 if (wtreset(iot, ioh, &avregs)) { 254 sc->type = ARCHIVE; 255 bcopy(&avregs, &sc->regs, sizeof(sc->regs)); 256 printf(": type <Archive>\n"); 257 /* Reset DMA. */ 258 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 259 goto ok; 260 } 261 262 /* what happened? */ 263 printf("%s: lost controller\n", self->dv_xname); 264 return; 265 266 ok: 267 sc->flags = TPSTART; /* tape is rewound */ 268 sc->dens = -1; /* unknown density */ 269 270 sc->chan = ia->ia_drq; 271 272 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 273 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 274 printf("%s: can't set up ISA DMA map\n", 275 sc->sc_dev.dv_xname); 276 return; 277 } 278 279 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 280 IPL_BIO, wtintr, sc); 281 } 282 283 int 284 wtdump(dev, blkno, va, size) 285 dev_t dev; 286 daddr_t blkno; 287 caddr_t va; 288 size_t size; 289 { 290 291 /* Not implemented. */ 292 return ENXIO; 293 } 294 295 int 296 wtsize(dev) 297 dev_t dev; 298 { 299 300 /* Not implemented. */ 301 return -1; 302 } 303 304 /* 305 * Open routine, called on every device open. 306 */ 307 int 308 wtopen(dev, flag, mode, p) 309 dev_t dev; 310 int flag; 311 int mode; 312 struct proc *p; 313 { 314 int unit = minor(dev) & T_UNIT; 315 struct wt_softc *sc; 316 int error; 317 318 if (unit >= wt_cd.cd_ndevs) 319 return ENXIO; 320 sc = wt_cd.cd_devs[unit]; 321 if (!sc) 322 return ENXIO; 323 324 /* Check that device is not in use */ 325 if (sc->flags & TPINUSE) 326 return EBUSY; 327 328 /* If the tape is in rewound state, check the status and set density. */ 329 if (sc->flags & TPSTART) { 330 /* If rewind is going on, wait */ 331 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 332 return error; 333 334 /* Check the controller status */ 335 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 336 /* Bad status, reset the controller. */ 337 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 338 return EIO; 339 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 340 return EIO; 341 } 342 343 /* Set up tape density. */ 344 if (sc->dens != (minor(dev) & WT_DENSEL)) { 345 int d = 0; 346 347 switch (minor(dev) & WT_DENSEL) { 348 case WT_DENSDFLT: 349 default: 350 break; /* default density */ 351 case WT_QIC11: 352 d = QIC_FMT11; break; /* minor 010 */ 353 case WT_QIC24: 354 d = QIC_FMT24; break; /* minor 020 */ 355 case WT_QIC120: 356 d = QIC_FMT120; break; /* minor 030 */ 357 case WT_QIC150: 358 d = QIC_FMT150; break; /* minor 040 */ 359 case WT_QIC300: 360 d = QIC_FMT300; break; /* minor 050 */ 361 case WT_QIC600: 362 d = QIC_FMT600; break; /* minor 060 */ 363 } 364 if (d) { 365 /* Change tape density. */ 366 if (!wtcmd(sc, d)) 367 return EIO; 368 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 369 return EIO; 370 371 /* Check the status of the controller. */ 372 if (sc->error & TP_ILL) { 373 printf("%s: invalid tape density\n", 374 sc->sc_dev.dv_xname); 375 return ENODEV; 376 } 377 } 378 sc->dens = minor(dev) & WT_DENSEL; 379 } 380 sc->flags &= ~TPSTART; 381 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 382 return ENXIO; 383 384 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 385 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 386 387 sc->flags = TPINUSE; 388 if (flag & FREAD) 389 sc->flags |= TPREAD; 390 if (flag & FWRITE) 391 sc->flags |= TPWRITE; 392 return 0; 393 } 394 395 /* 396 * Close routine, called on last device close. 397 */ 398 int 399 wtclose(dev, flags, mode, p) 400 dev_t dev; 401 int flags; 402 int mode; 403 struct proc *p; 404 { 405 int unit = minor(dev) & T_UNIT; 406 struct wt_softc *sc = wt_cd.cd_devs[unit]; 407 408 /* If rewind is pending, do nothing */ 409 if (sc->flags & TPREW) 410 goto done; 411 412 /* If seek forward is pending and no rewind on close, do nothing */ 413 if (sc->flags & TPRMARK) { 414 if (minor(dev) & T_NOREWIND) 415 goto done; 416 417 /* If read file mark is going on, wait */ 418 wtwait(sc, 0, "wtrfm"); 419 } 420 421 if (sc->flags & TPWANY) { 422 /* Tape was written. Write file mark. */ 423 wtwritefm(sc); 424 } 425 426 if ((minor(dev) & T_NOREWIND) == 0) { 427 /* Rewind to beginning of tape. */ 428 /* Don't wait until rewind, though. */ 429 wtrewind(sc); 430 goto done; 431 } 432 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 433 /* Space forward to after next file mark if no writing done. */ 434 /* Don't wait for completion. */ 435 wtreadfm(sc); 436 } 437 438 done: 439 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 440 free(sc->buf, M_TEMP); 441 return 0; 442 } 443 444 /* 445 * Ioctl routine. Compatible with BSD ioctls. 446 * Direct QIC-02 commands ERASE and RETENSION added. 447 * There are three possible ioctls: 448 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 449 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 450 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 451 */ 452 int 453 wtioctl(dev, cmd, addr, flag, p) 454 dev_t dev; 455 u_long cmd; 456 caddr_t addr; 457 int flag; 458 struct proc *p; 459 { 460 int unit = minor(dev) & T_UNIT; 461 struct wt_softc *sc = wt_cd.cd_devs[unit]; 462 int error, count, op; 463 464 switch (cmd) { 465 default: 466 return EINVAL; 467 case WTQICMD: /* direct QIC command */ 468 op = *(int *)addr; 469 switch (op) { 470 default: 471 return EINVAL; 472 case QIC_ERASE: /* erase the whole tape */ 473 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 474 return EACCES; 475 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 476 return error; 477 break; 478 case QIC_RETENS: /* retension the tape */ 479 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 480 return error; 481 break; 482 } 483 /* Both ERASE and RETENS operations work like REWIND. */ 484 /* Simulate the rewind operation here. */ 485 sc->flags &= ~(TPRO | TPWO | TPVOL); 486 if (!wtcmd(sc, op)) 487 return EIO; 488 sc->flags |= TPSTART | TPREW; 489 if (op == QIC_ERASE) 490 sc->flags |= TPWANY; 491 wtclock(sc); 492 return 0; 493 case MTIOCIEOT: /* ignore EOT errors */ 494 case MTIOCEEOT: /* enable EOT errors */ 495 return 0; 496 case MTIOCGET: 497 ((struct mtget*)addr)->mt_type = 498 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 499 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 500 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 501 ((struct mtget*)addr)->mt_resid = 0; 502 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 503 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 504 return 0; 505 case MTIOCTOP: 506 break; 507 } 508 509 switch ((short)((struct mtop*)addr)->mt_op) { 510 default: 511 #if 0 512 case MTFSR: /* forward space record */ 513 case MTBSR: /* backward space record */ 514 case MTBSF: /* backward space file */ 515 #endif 516 return EINVAL; 517 case MTNOP: /* no operation, sets status only */ 518 case MTCACHE: /* enable controller cache */ 519 case MTNOCACHE: /* disable controller cache */ 520 return 0; 521 case MTREW: /* rewind */ 522 case MTOFFL: /* rewind and put the drive offline */ 523 if (sc->flags & TPREW) /* rewind is running */ 524 return 0; 525 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 526 return error; 527 wtrewind(sc); 528 return 0; 529 case MTFSF: /* forward space file */ 530 for (count = ((struct mtop*)addr)->mt_count; count > 0; 531 --count) { 532 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 533 return error; 534 if ((error = wtreadfm(sc)) != 0) 535 return error; 536 } 537 return 0; 538 case MTWEOF: /* write an end-of-file record */ 539 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 540 return EACCES; 541 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 542 return error; 543 if ((error = wtwritefm(sc)) != 0) 544 return error; 545 return 0; 546 } 547 548 #ifdef DIAGNOSTIC 549 panic("wtioctl: impossible"); 550 #endif 551 } 552 553 /* 554 * Strategy routine. 555 */ 556 void 557 wtstrategy(bp) 558 struct buf *bp; 559 { 560 int unit = minor(bp->b_dev) & T_UNIT; 561 struct wt_softc *sc = wt_cd.cd_devs[unit]; 562 int s; 563 564 bp->b_resid = bp->b_bcount; 565 566 /* at file marks and end of tape, we just return '0 bytes available' */ 567 if (sc->flags & TPVOL) 568 goto xit; 569 570 if (bp->b_flags & B_READ) { 571 /* Check read access and no previous write to this tape. */ 572 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 573 goto errxit; 574 575 /* For now, we assume that all data will be copied out */ 576 /* If read command outstanding, just skip down */ 577 if ((sc->flags & TPRO) == 0) { 578 if (!wtsense(sc, 1, TP_WRP)) { 579 /* Clear status. */ 580 goto errxit; 581 } 582 if (!wtcmd(sc, QIC_RDDATA)) { 583 /* Set read mode. */ 584 wtsense(sc, 1, TP_WRP); 585 goto errxit; 586 } 587 sc->flags |= TPRO | TPRANY; 588 } 589 } else { 590 /* Check write access and write protection. */ 591 /* No previous read from this tape allowed. */ 592 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 593 goto errxit; 594 595 /* If write command outstanding, just skip down */ 596 if ((sc->flags & TPWO) == 0) { 597 if (!wtsense(sc, 1, 0)) { 598 /* Clear status. */ 599 goto errxit; 600 } 601 if (!wtcmd(sc, QIC_WRTDATA)) { 602 /* Set write mode. */ 603 wtsense(sc, 1, 0); 604 goto errxit; 605 } 606 sc->flags |= TPWO | TPWANY; 607 } 608 } 609 610 if (bp->b_bcount == 0) 611 goto xit; 612 613 sc->flags &= ~TPEXCEP; 614 s = splbio(); 615 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 616 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 617 bp->b_resid -= sc->dmacount; 618 } 619 splx(s); 620 621 if (sc->flags & TPEXCEP) { 622 errxit: 623 bp->b_flags |= B_ERROR; 624 bp->b_error = EIO; 625 } 626 xit: 627 biodone(bp); 628 return; 629 } 630 631 int 632 wtread(dev, uio, flags) 633 dev_t dev; 634 struct uio *uio; 635 int flags; 636 { 637 638 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 639 } 640 641 int 642 wtwrite(dev, uio, flags) 643 dev_t dev; 644 struct uio *uio; 645 int flags; 646 { 647 648 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 649 } 650 651 /* 652 * Interrupt routine. 653 */ 654 int 655 wtintr(arg) 656 void *arg; 657 { 658 struct wt_softc *sc = arg; 659 u_char x; 660 661 /* get status */ 662 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 663 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 664 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 665 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 666 WTDBPRINT(("busy\n")); 667 return 0; /* device is busy */ 668 } 669 670 /* 671 * Check if rewind finished. 672 */ 673 if (sc->flags & TPREW) { 674 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 675 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 676 "rewind busy?\n" : "rewind finished\n")); 677 sc->flags &= ~TPREW; /* rewind finished */ 678 wtsense(sc, 1, TP_WRP); 679 wakeup((caddr_t)sc); 680 return 1; 681 } 682 683 /* 684 * Check if writing/reading of file mark finished. 685 */ 686 if (sc->flags & (TPRMARK | TPWMARK)) { 687 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 688 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 689 "marker r/w busy?\n" : "marker r/w finished\n")); 690 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 691 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 692 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 693 wakeup((caddr_t)sc); 694 return 1; 695 } 696 697 /* 698 * Do we started any i/o? If no, just return. 699 */ 700 if ((sc->flags & TPACTIVE) == 0) { 701 WTDBPRINT(("unexpected interrupt\n")); 702 return 0; 703 } 704 sc->flags &= ~TPACTIVE; 705 sc->dmacount += sc->bsize; /* increment counter */ 706 707 /* 708 * Clean up dma. 709 */ 710 if ((sc->dmaflags & DMAMODE_READ) && 711 (sc->dmatotal - sc->dmacount) < sc->bsize) { 712 /* If reading short block, copy the internal buffer 713 * to the user memory. */ 714 isa_dmadone(sc->sc_ic, sc->chan); 715 bcopy(sc->buf, sc->dmavaddr, sc->dmatotal - sc->dmacount); 716 } else 717 isa_dmadone(sc->sc_ic, sc->chan); 718 719 /* 720 * On exception, check for end of file and end of volume. 721 */ 722 if ((x & sc->regs.NOEXCEP) == 0) { 723 WTDBPRINT(("i/o exception\n")); 724 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 725 if (sc->error & (TP_EOM | TP_FIL)) 726 sc->flags |= TPVOL; /* end of file */ 727 else 728 sc->flags |= TPEXCEP; /* i/o error */ 729 wakeup((caddr_t)sc); 730 return 1; 731 } 732 733 if (sc->dmacount < sc->dmatotal) { 734 /* Continue I/O. */ 735 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 736 wtdma(sc); 737 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 738 return 1; 739 } 740 if (sc->dmacount > sc->dmatotal) /* short last block */ 741 sc->dmacount = sc->dmatotal; 742 /* Wake up user level. */ 743 wakeup((caddr_t)sc); 744 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 745 return 1; 746 } 747 748 /* start the rewind operation */ 749 void 750 wtrewind(sc) 751 struct wt_softc *sc; 752 { 753 int rwmode = sc->flags & (TPRO | TPWO); 754 755 sc->flags &= ~(TPRO | TPWO | TPVOL); 756 /* 757 * Wangtek strictly follows QIC-02 standard: 758 * clearing ONLINE in read/write modes causes rewind. 759 * REWIND command is not allowed in read/write mode 760 * and gives `illegal command' error. 761 */ 762 if (sc->type == WANGTEK && rwmode) { 763 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 764 } else if (!wtcmd(sc, QIC_REWIND)) 765 return; 766 sc->flags |= TPSTART | TPREW; 767 wtclock(sc); 768 } 769 770 /* 771 * Start the `read marker' operation. 772 */ 773 int 774 wtreadfm(sc) 775 struct wt_softc *sc; 776 { 777 778 sc->flags &= ~(TPRO | TPWO | TPVOL); 779 if (!wtcmd(sc, QIC_READFM)) { 780 wtsense(sc, 1, TP_WRP); 781 return EIO; 782 } 783 sc->flags |= TPRMARK | TPRANY; 784 wtclock(sc); 785 /* Don't wait for completion here. */ 786 return 0; 787 } 788 789 /* 790 * Write marker to the tape. 791 */ 792 int 793 wtwritefm(sc) 794 struct wt_softc *sc; 795 { 796 797 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 798 sc->flags &= ~(TPRO | TPWO); 799 if (!wtcmd(sc, QIC_WRITEFM)) { 800 wtsense(sc, 1, 0); 801 return EIO; 802 } 803 sc->flags |= TPWMARK | TPWANY; 804 wtclock(sc); 805 return wtwait(sc, 0, "wtwfm"); 806 } 807 808 /* 809 * While controller status & mask == bits continue waiting. 810 */ 811 u_char 812 wtsoft(sc, mask, bits) 813 struct wt_softc *sc; 814 int mask, bits; 815 { 816 bus_space_tag_t iot = sc->sc_iot; 817 bus_space_handle_t ioh = sc->sc_ioh; 818 u_char x; 819 int i; 820 821 822 /* Poll status port, waiting for specified bits. */ 823 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 824 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 825 if ((x & mask) != bits) 826 return x; 827 delay(1); 828 } 829 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 830 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 831 if ((x & mask) != bits) 832 return x; 833 delay(100); 834 } 835 for (;;) { /* forever */ 836 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 837 if ((x & mask) != bits) 838 return x; 839 tsleep((caddr_t)wtsoft, WTPRI, "wtsoft", 1); 840 } 841 } 842 843 /* 844 * Execute QIC command. 845 */ 846 int 847 wtcmd(sc, cmd) 848 struct wt_softc *sc; 849 int cmd; 850 { 851 bus_space_tag_t iot = sc->sc_iot; 852 bus_space_handle_t ioh = sc->sc_ioh; 853 u_char x; 854 int s; 855 856 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 857 s = splbio(); 858 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 859 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 860 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 861 splx(s); 862 return 0; 863 } 864 865 /* output the command */ 866 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 867 868 /* set request */ 869 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 870 sc->regs.REQUEST | sc->regs.ONLINE); 871 872 /* wait for ready */ 873 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 874 875 /* reset request */ 876 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 877 sc->regs.IEN | sc->regs.ONLINE); 878 879 /* wait for not ready */ 880 wtsoft(sc, sc->regs.BUSY, 0); 881 splx(s); 882 return 1; 883 } 884 885 /* wait for the end of i/o, seeking marker or rewind operation */ 886 int 887 wtwait(sc, catch, msg) 888 struct wt_softc *sc; 889 int catch; 890 char *msg; 891 { 892 int error; 893 894 WTDBPRINT(("wtwait() `%s'\n", msg)); 895 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 896 if ((error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) != 0) 897 return error; 898 return 0; 899 } 900 901 /* initialize dma for the i/o operation */ 902 void 903 wtdma(sc) 904 struct wt_softc *sc; 905 { 906 bus_space_tag_t iot = sc->sc_iot; 907 bus_space_handle_t ioh = sc->sc_ioh; 908 909 sc->flags |= TPACTIVE; 910 wtclock(sc); 911 912 if (sc->type == ARCHIVE) { 913 /* Set DMA. */ 914 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 915 } 916 917 if ((sc->dmaflags & DMAMODE_READ) && 918 (sc->dmatotal - sc->dmacount) < sc->bsize) { 919 /* Reading short block; do it through the internal buffer. */ 920 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 921 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 922 } else 923 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 924 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 925 } 926 927 /* start i/o operation */ 928 int 929 wtstart(sc, flag, vaddr, len) 930 struct wt_softc *sc; 931 int flag; 932 void *vaddr; 933 size_t len; 934 { 935 u_char x; 936 937 WTDBPRINT(("wtstart()\n")); 938 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 939 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 940 if ((x & sc->regs.NOEXCEP) == 0) { 941 sc->flags |= TPEXCEP; /* error */ 942 return 0; 943 } 944 sc->flags &= ~TPEXCEP; /* clear exception flag */ 945 sc->dmavaddr = vaddr; 946 sc->dmatotal = len; 947 sc->dmacount = 0; 948 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 949 wtdma(sc); 950 return 1; 951 } 952 953 /* 954 * Start timer. 955 */ 956 void 957 wtclock(sc) 958 struct wt_softc *sc; 959 { 960 961 if (sc->flags & TPTIMER) 962 return; 963 sc->flags |= TPTIMER; 964 /* 965 * Some controllers seem to lose dma interrupts too often. To make the 966 * tape stream we need 1 tick timeout. 967 */ 968 timeout(wttimer, sc, (sc->flags & TPACTIVE) ? 1 : hz); 969 } 970 971 /* 972 * Simulate an interrupt periodically while i/o is going. 973 * This is necessary in case interrupts get eaten due to 974 * multiple devices on a single IRQ line. 975 */ 976 void 977 wttimer(arg) 978 void *arg; 979 { 980 register struct wt_softc *sc = (struct wt_softc *)arg; 981 int s; 982 u_char status; 983 984 sc->flags &= ~TPTIMER; 985 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 986 return; 987 988 /* If i/o going, simulate interrupt. */ 989 s = splbio(); 990 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 991 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 992 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 993 WTDBPRINT(("wttimer() -- ")); 994 wtintr(sc); 995 } 996 splx(s); 997 998 /* Restart timer if i/o pending. */ 999 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1000 wtclock(sc); 1001 } 1002 1003 /* 1004 * Perform QIC-02 and QIC-36 compatible reset sequence. 1005 */ 1006 int 1007 wtreset(iot, ioh, regs) 1008 bus_space_tag_t iot; 1009 bus_space_handle_t ioh; 1010 struct wtregs *regs; 1011 { 1012 u_char x; 1013 int i; 1014 1015 /* send reset */ 1016 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1017 delay(30); 1018 /* turn off reset */ 1019 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1020 delay(30); 1021 1022 /* Read the controller status. */ 1023 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1024 if (x == 0xff) /* no port at this address? */ 1025 return 0; 1026 1027 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1028 for (i = 0; i < 3000; ++i) { 1029 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1030 break; 1031 delay(1000); 1032 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1033 } 1034 return (x & regs->RESETMASK) == regs->RESETVAL; 1035 } 1036 1037 /* 1038 * Get controller status information. Return 0 if user i/o request should 1039 * receive an i/o error code. 1040 */ 1041 int 1042 wtsense(sc, verbose, ignore) 1043 struct wt_softc *sc; 1044 int verbose, ignore; 1045 { 1046 char *msg = 0; 1047 int error; 1048 1049 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1050 sc->flags &= ~(TPRO | TPWO); 1051 if (!wtstatus(sc)) 1052 return 0; 1053 if ((sc->error & TP_ST0) == 0) 1054 sc->error &= ~TP_ST0MASK; 1055 if ((sc->error & TP_ST1) == 0) 1056 sc->error &= ~TP_ST1MASK; 1057 sc->error &= ~ignore; /* ignore certain errors */ 1058 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1059 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1060 if (!error) 1061 return 1; 1062 if (!verbose) 1063 return 0; 1064 1065 /* lifted from tdriver.c from Wangtek */ 1066 if (error & TP_USL) 1067 msg = "Drive not online"; 1068 else if (error & TP_CNI) 1069 msg = "No cartridge"; 1070 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1071 msg = "Tape is write protected"; 1072 sc->flags |= TPWP; 1073 } else if (error & TP_FIL) 1074 msg = 0 /*"Filemark detected"*/; 1075 else if (error & TP_EOM) 1076 msg = 0 /*"End of tape"*/; 1077 else if (error & TP_BNL) 1078 msg = "Block not located"; 1079 else if (error & TP_UDA) 1080 msg = "Unrecoverable data error"; 1081 else if (error & TP_NDT) 1082 msg = "No data detected"; 1083 else if (error & TP_ILL) 1084 msg = "Illegal command"; 1085 if (msg) 1086 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 1087 return 0; 1088 } 1089 1090 /* 1091 * Get controller status information. 1092 */ 1093 int 1094 wtstatus(sc) 1095 struct wt_softc *sc; 1096 { 1097 bus_space_tag_t iot = sc->sc_iot; 1098 bus_space_handle_t ioh = sc->sc_ioh; 1099 char *p; 1100 int s; 1101 1102 s = splbio(); 1103 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1104 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1105 /* send `read status' command */ 1106 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1107 1108 /* set request */ 1109 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1110 sc->regs.REQUEST | sc->regs.ONLINE); 1111 1112 /* wait for ready */ 1113 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1114 /* reset request */ 1115 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1116 1117 /* wait for not ready */ 1118 wtsoft(sc, sc->regs.BUSY, 0); 1119 1120 p = (char *)&sc->error; 1121 while (p < (char *)&sc->error + 6) { 1122 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1123 sc->regs.BUSY | sc->regs.NOEXCEP); 1124 1125 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1126 splx(s); 1127 return 0; 1128 } 1129 1130 /* read status byte */ 1131 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1132 1133 /* set request */ 1134 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1135 sc->regs.REQUEST | sc->regs.ONLINE); 1136 1137 /* wait for not ready */ 1138 wtsoft(sc, sc->regs.BUSY, 0); 1139 1140 /* unset request */ 1141 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1142 } 1143 splx(s); 1144 return 1; 1145 } 1146
Indexes created Wed Sep 24 14:09:57 GMT 2025