1 /* $NetBSD: wt.c,v 1.52 2001/07/18 20:52:48 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@kiae.su> 9 * Serge Vakulenko <vak@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@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/callout.h> 56 #include <sys/kernel.h> 57 #include <sys/buf.h> 58 #include <sys/fcntl.h> 59 #include <sys/malloc.h> 60 #include <sys/ioctl.h> 61 #include <sys/mtio.h> 62 #include <sys/device.h> 63 #include <sys/proc.h> 64 #include <sys/conf.h> 65 66 #include <machine/intr.h> 67 #include <machine/bus.h> 68 #include <machine/pio.h> 69 70 #include <dev/isa/isavar.h> 71 #include <dev/isa/isadmavar.h> 72 #include <dev/isa/wtreg.h> 73 74 /* 75 * Uncomment this to enable internal device tracing. 76 */ 77 #define WTDBPRINT(x) /* printf x */ 78 79 #define WTPRI (PZERO+10) /* sleep priority */ 80 81 #define WT_NPORT 2 /* 2 i/o ports */ 82 #define AV_NPORT 4 /* 4 i/o ports */ 83 84 enum wttype { 85 UNKNOWN = 0, /* unknown type, driver disabled */ 86 ARCHIVE, /* Archive Viper SC499, SC402 etc */ 87 WANGTEK, /* Wangtek */ 88 }; 89 90 static struct wtregs { 91 /* controller ports */ 92 int DATAPORT, /* data, read only */ 93 CMDPORT, /* command, write only */ 94 STATPORT, /* status, read only */ 95 CTLPORT, /* control, write only */ 96 SDMAPORT, /* start dma */ 97 RDMAPORT; /* reset dma */ 98 /* status port bits */ 99 u_char BUSY, /* not ready bit define */ 100 NOEXCEP, /* no exception bit define */ 101 RESETMASK, /* to check after reset */ 102 RESETVAL, /* state after reset */ 103 /* control port bits */ 104 ONLINE, /* device selected */ 105 RESET, /* reset command */ 106 REQUEST, /* request command */ 107 IEN; /* enable interrupts */ 108 } wtregs = { 109 1, 1, 0, 0, 0, 0, 110 0x01, 0x02, 0x07, 0x05, 111 0x01, 0x02, 0x04, 0x08 112 }, avregs = { 113 0, 0, 1, 1, 2, 3, 114 0x40, 0x20, 0xf8, 0x50, 115 0, 0x80, 0x40, 0x20 116 }; 117 118 struct wt_softc { 119 struct device sc_dev; 120 void *sc_ih; 121 122 bus_space_tag_t sc_iot; 123 bus_space_handle_t sc_ioh; 124 isa_chipset_tag_t sc_ic; 125 126 struct callout sc_timer_ch; 127 128 enum wttype type; /* type of controller */ 129 int chan; /* dma channel number, 1..3 */ 130 int flags; /* state of tape drive */ 131 unsigned dens; /* tape density */ 132 int bsize; /* tape block size */ 133 void *buf; /* internal i/o buffer */ 134 135 void *dmavaddr; /* virtual address of dma i/o buffer */ 136 size_t dmatotal; /* size of i/o buffer */ 137 int dmaflags; /* i/o direction */ 138 size_t dmacount; /* resulting length of dma i/o */ 139 140 u_short error; /* code for error encountered */ 141 u_short ercnt; /* number of error blocks */ 142 u_short urcnt; /* number of underruns */ 143 144 struct wtregs regs; 145 }; 146 147 /* XXX: These don't belong here really */ 148 cdev_decl(wt); 149 bdev_decl(wt); 150 151 int wtwait __P((struct wt_softc *sc, int catch, char *msg)); 152 int wtcmd __P((struct wt_softc *sc, int cmd)); 153 int wtstart __P((struct wt_softc *sc, int flag, void *vaddr, size_t len)); 154 void wtdma __P((struct wt_softc *sc)); 155 void wttimer __P((void *arg)); 156 void wtclock __P((struct wt_softc *sc)); 157 int wtreset __P((bus_space_tag_t, bus_space_handle_t, struct wtregs *)); 158 int wtsense __P((struct wt_softc *sc, int verbose, int ignore)); 159 int wtstatus __P((struct wt_softc *sc)); 160 void wtrewind __P((struct wt_softc *sc)); 161 int wtreadfm __P((struct wt_softc *sc)); 162 int wtwritefm __P((struct wt_softc *sc)); 163 u_char wtsoft __P((struct wt_softc *sc, int mask, int bits)); 164 165 int wtprobe __P((struct device *, struct cfdata *, void *)); 166 void wtattach __P((struct device *, struct device *, void *)); 167 int wtintr __P((void *sc)); 168 169 struct cfattach wt_ca = { 170 sizeof(struct wt_softc), wtprobe, wtattach 171 }; 172 173 extern struct cfdriver wt_cd; 174 175 /* 176 * Probe for the presence of the device. 177 */ 178 int 179 wtprobe(parent, match, aux) 180 struct device *parent; 181 struct cfdata *match; 182 void *aux; 183 { 184 struct isa_attach_args *ia = aux; 185 bus_space_tag_t iot = ia->ia_iot; 186 bus_space_handle_t ioh; 187 int rv = 0; 188 189 190 /* Disallow wildcarded i/o address. */ 191 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 192 return (0); 193 194 if (ia->ia_drq < 1 || ia->ia_drq > 3) { 195 printf("wtprobe: Bad drq=%d, should be 1..3\n", ia->ia_drq); 196 return (0); 197 } 198 199 /* Map i/o space */ 200 if (bus_space_map(iot, ia->ia_iobase, AV_NPORT, 0, &ioh)) 201 return 0; 202 203 /* Try Wangtek. */ 204 if (wtreset(iot, ioh, &wtregs)) { 205 ia->ia_iosize = WT_NPORT; /* XXX misleading */ 206 rv = 1; 207 goto done; 208 } 209 210 /* Try Archive. */ 211 if (wtreset(iot, ioh, &avregs)) { 212 ia->ia_iosize = AV_NPORT; 213 rv = 1; 214 goto done; 215 } 216 217 done: 218 bus_space_unmap(iot, ioh, AV_NPORT); 219 return rv; 220 } 221 222 /* 223 * Device is found, configure it. 224 */ 225 void 226 wtattach(parent, self, aux) 227 struct device *parent, *self; 228 void *aux; 229 { 230 struct wt_softc *sc = (void *)self; 231 struct isa_attach_args *ia = aux; 232 bus_space_tag_t iot = ia->ia_iot; 233 bus_space_handle_t ioh; 234 bus_size_t maxsize; 235 236 /* Map i/o space */ 237 if (bus_space_map(iot, ia->ia_iobase, AV_NPORT, 0, &ioh)) { 238 printf(": can't map i/o space\n"); 239 return; 240 } 241 242 sc->sc_iot = iot; 243 sc->sc_ioh = ioh; 244 sc->sc_ic = ia->ia_ic; 245 246 callout_init(&sc->sc_timer_ch); 247 248 /* Try Wangtek. */ 249 if (wtreset(iot, ioh, &wtregs)) { 250 sc->type = WANGTEK; 251 memcpy(&sc->regs, &wtregs, sizeof(sc->regs)); 252 printf(": type <Wangtek>\n"); 253 goto ok; 254 } 255 256 /* Try Archive. */ 257 if (wtreset(iot, ioh, &avregs)) { 258 sc->type = ARCHIVE; 259 memcpy(&sc->regs, &avregs, sizeof(sc->regs)); 260 printf(": type <Archive>\n"); 261 /* Reset DMA. */ 262 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 263 goto ok; 264 } 265 266 /* what happened? */ 267 printf("%s: lost controller\n", self->dv_xname); 268 return; 269 270 ok: 271 sc->flags = TPSTART; /* tape is rewound */ 272 sc->dens = -1; /* unknown density */ 273 274 sc->chan = ia->ia_drq; 275 276 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->chan)) < MAXPHYS) { 277 printf("%s: max DMA size %lu is less than required %d\n", 278 sc->sc_dev.dv_xname, (u_long)maxsize, MAXPHYS); 279 return; 280 } 281 282 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 283 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 284 printf("%s: can't set up ISA DMA map\n", 285 sc->sc_dev.dv_xname); 286 return; 287 } 288 289 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 290 IPL_BIO, wtintr, sc); 291 } 292 293 int 294 wtdump(dev, blkno, va, size) 295 dev_t dev; 296 daddr_t blkno; 297 caddr_t va; 298 size_t size; 299 { 300 301 /* Not implemented. */ 302 return ENXIO; 303 } 304 305 int 306 wtsize(dev) 307 dev_t dev; 308 { 309 310 /* Not implemented. */ 311 return -1; 312 } 313 314 /* 315 * Open routine, called on every device open. 316 */ 317 int 318 wtopen(dev, flag, mode, p) 319 dev_t dev; 320 int flag; 321 int mode; 322 struct proc *p; 323 { 324 int unit = minor(dev) & T_UNIT; 325 struct wt_softc *sc; 326 int error; 327 328 sc = device_lookup(&wt_cd, unit); 329 if (sc == NULL) 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 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_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 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_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 struct wt_softc *sc = device_lookup(&wt_cd, minor(bp->b_dev) & T_UNIT); 567 int s; 568 569 bp->b_resid = bp->b_bcount; 570 571 /* at file marks and end of tape, we just return '0 bytes available' */ 572 if (sc->flags & TPVOL) 573 goto xit; 574 575 if (bp->b_flags & B_READ) { 576 /* Check read access and no previous write to this tape. */ 577 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 578 goto errxit; 579 580 /* For now, we assume that all data will be copied out */ 581 /* If read command outstanding, just skip down */ 582 if ((sc->flags & TPRO) == 0) { 583 if (!wtsense(sc, 1, TP_WRP)) { 584 /* Clear status. */ 585 goto errxit; 586 } 587 if (!wtcmd(sc, QIC_RDDATA)) { 588 /* Set read mode. */ 589 wtsense(sc, 1, TP_WRP); 590 goto errxit; 591 } 592 sc->flags |= TPRO | TPRANY; 593 } 594 } else { 595 /* Check write access and write protection. */ 596 /* No previous read from this tape allowed. */ 597 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 598 goto errxit; 599 600 /* If write command outstanding, just skip down */ 601 if ((sc->flags & TPWO) == 0) { 602 if (!wtsense(sc, 1, 0)) { 603 /* Clear status. */ 604 goto errxit; 605 } 606 if (!wtcmd(sc, QIC_WRTDATA)) { 607 /* Set write mode. */ 608 wtsense(sc, 1, 0); 609 goto errxit; 610 } 611 sc->flags |= TPWO | TPWANY; 612 } 613 } 614 615 if (bp->b_bcount == 0) 616 goto xit; 617 618 sc->flags &= ~TPEXCEP; 619 s = splbio(); 620 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 621 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 622 bp->b_resid -= sc->dmacount; 623 } 624 splx(s); 625 626 if (sc->flags & TPEXCEP) { 627 errxit: 628 bp->b_flags |= B_ERROR; 629 bp->b_error = EIO; 630 } 631 xit: 632 biodone(bp); 633 return; 634 } 635 636 int 637 wtread(dev, uio, flags) 638 dev_t dev; 639 struct uio *uio; 640 int flags; 641 { 642 643 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 644 } 645 646 int 647 wtwrite(dev, uio, flags) 648 dev_t dev; 649 struct uio *uio; 650 int flags; 651 { 652 653 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 654 } 655 656 /* 657 * Interrupt routine. 658 */ 659 int 660 wtintr(arg) 661 void *arg; 662 { 663 struct wt_softc *sc = arg; 664 u_char x; 665 666 /* get status */ 667 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 668 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 669 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 670 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 671 WTDBPRINT(("busy\n")); 672 return 0; /* device is busy */ 673 } 674 675 /* 676 * Check if rewind finished. 677 */ 678 if (sc->flags & TPREW) { 679 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 680 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 681 "rewind busy?\n" : "rewind finished\n")); 682 sc->flags &= ~TPREW; /* rewind finished */ 683 wtsense(sc, 1, TP_WRP); 684 wakeup((caddr_t)sc); 685 return 1; 686 } 687 688 /* 689 * Check if writing/reading of file mark finished. 690 */ 691 if (sc->flags & (TPRMARK | TPWMARK)) { 692 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 693 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 694 "marker r/w busy?\n" : "marker r/w finished\n")); 695 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 696 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 697 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 698 wakeup((caddr_t)sc); 699 return 1; 700 } 701 702 /* 703 * Do we started any i/o? If no, just return. 704 */ 705 if ((sc->flags & TPACTIVE) == 0) { 706 WTDBPRINT(("unexpected interrupt\n")); 707 return 0; 708 } 709 sc->flags &= ~TPACTIVE; 710 sc->dmacount += sc->bsize; /* increment counter */ 711 712 /* 713 * Clean up dma. 714 */ 715 if ((sc->dmaflags & DMAMODE_READ) && 716 (sc->dmatotal - sc->dmacount) < sc->bsize) { 717 /* If reading short block, copy the internal buffer 718 * to the user memory. */ 719 isa_dmadone(sc->sc_ic, sc->chan); 720 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 721 } else 722 isa_dmadone(sc->sc_ic, sc->chan); 723 724 /* 725 * On exception, check for end of file and end of volume. 726 */ 727 if ((x & sc->regs.NOEXCEP) == 0) { 728 WTDBPRINT(("i/o exception\n")); 729 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 730 if (sc->error & (TP_EOM | TP_FIL)) 731 sc->flags |= TPVOL; /* end of file */ 732 else 733 sc->flags |= TPEXCEP; /* i/o error */ 734 wakeup((caddr_t)sc); 735 return 1; 736 } 737 738 if (sc->dmacount < sc->dmatotal) { 739 /* Continue I/O. */ 740 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 741 wtdma(sc); 742 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 743 return 1; 744 } 745 if (sc->dmacount > sc->dmatotal) /* short last block */ 746 sc->dmacount = sc->dmatotal; 747 /* Wake up user level. */ 748 wakeup((caddr_t)sc); 749 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 750 return 1; 751 } 752 753 /* start the rewind operation */ 754 void 755 wtrewind(sc) 756 struct wt_softc *sc; 757 { 758 int rwmode = sc->flags & (TPRO | TPWO); 759 760 sc->flags &= ~(TPRO | TPWO | TPVOL); 761 /* 762 * Wangtek strictly follows QIC-02 standard: 763 * clearing ONLINE in read/write modes causes rewind. 764 * REWIND command is not allowed in read/write mode 765 * and gives `illegal command' error. 766 */ 767 if (sc->type == WANGTEK && rwmode) { 768 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 769 } else if (!wtcmd(sc, QIC_REWIND)) 770 return; 771 sc->flags |= TPSTART | TPREW; 772 wtclock(sc); 773 } 774 775 /* 776 * Start the `read marker' operation. 777 */ 778 int 779 wtreadfm(sc) 780 struct wt_softc *sc; 781 { 782 783 sc->flags &= ~(TPRO | TPWO | TPVOL); 784 if (!wtcmd(sc, QIC_READFM)) { 785 wtsense(sc, 1, TP_WRP); 786 return EIO; 787 } 788 sc->flags |= TPRMARK | TPRANY; 789 wtclock(sc); 790 /* Don't wait for completion here. */ 791 return 0; 792 } 793 794 /* 795 * Write marker to the tape. 796 */ 797 int 798 wtwritefm(sc) 799 struct wt_softc *sc; 800 { 801 802 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 803 sc->flags &= ~(TPRO | TPWO); 804 if (!wtcmd(sc, QIC_WRITEFM)) { 805 wtsense(sc, 1, 0); 806 return EIO; 807 } 808 sc->flags |= TPWMARK | TPWANY; 809 wtclock(sc); 810 return wtwait(sc, 0, "wtwfm"); 811 } 812 813 /* 814 * While controller status & mask == bits continue waiting. 815 */ 816 u_char 817 wtsoft(sc, mask, bits) 818 struct wt_softc *sc; 819 int mask, bits; 820 { 821 bus_space_tag_t iot = sc->sc_iot; 822 bus_space_handle_t ioh = sc->sc_ioh; 823 u_char x; 824 int i; 825 826 827 /* Poll status port, waiting for specified bits. */ 828 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 829 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 830 if ((x & mask) != bits) 831 return x; 832 delay(1); 833 } 834 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 835 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 836 if ((x & mask) != bits) 837 return x; 838 delay(100); 839 } 840 for (;;) { /* forever */ 841 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 842 if ((x & mask) != bits) 843 return x; 844 tsleep((caddr_t)wtsoft, WTPRI, "wtsoft", 1); 845 } 846 } 847 848 /* 849 * Execute QIC command. 850 */ 851 int 852 wtcmd(sc, cmd) 853 struct wt_softc *sc; 854 int cmd; 855 { 856 bus_space_tag_t iot = sc->sc_iot; 857 bus_space_handle_t ioh = sc->sc_ioh; 858 u_char x; 859 int s; 860 861 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 862 s = splbio(); 863 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 864 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 865 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 866 splx(s); 867 return 0; 868 } 869 870 /* output the command */ 871 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 872 873 /* set request */ 874 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 875 sc->regs.REQUEST | sc->regs.ONLINE); 876 877 /* wait for ready */ 878 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 879 880 /* reset request */ 881 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 882 sc->regs.IEN | sc->regs.ONLINE); 883 884 /* wait for not ready */ 885 wtsoft(sc, sc->regs.BUSY, 0); 886 splx(s); 887 return 1; 888 } 889 890 /* wait for the end of i/o, seeking marker or rewind operation */ 891 int 892 wtwait(sc, catch, msg) 893 struct wt_softc *sc; 894 int catch; 895 char *msg; 896 { 897 int error; 898 899 WTDBPRINT(("wtwait() `%s'\n", msg)); 900 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 901 if ((error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) != 0) 902 return error; 903 return 0; 904 } 905 906 /* initialize dma for the i/o operation */ 907 void 908 wtdma(sc) 909 struct wt_softc *sc; 910 { 911 bus_space_tag_t iot = sc->sc_iot; 912 bus_space_handle_t ioh = sc->sc_ioh; 913 914 sc->flags |= TPACTIVE; 915 wtclock(sc); 916 917 if (sc->type == ARCHIVE) { 918 /* Set DMA. */ 919 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 920 } 921 922 if ((sc->dmaflags & DMAMODE_READ) && 923 (sc->dmatotal - sc->dmacount) < sc->bsize) { 924 /* Reading short block; do it through the internal buffer. */ 925 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 926 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 927 } else 928 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 929 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 930 } 931 932 /* start i/o operation */ 933 int 934 wtstart(sc, flag, vaddr, len) 935 struct wt_softc *sc; 936 int flag; 937 void *vaddr; 938 size_t len; 939 { 940 u_char x; 941 942 WTDBPRINT(("wtstart()\n")); 943 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 944 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 945 if ((x & sc->regs.NOEXCEP) == 0) { 946 sc->flags |= TPEXCEP; /* error */ 947 return 0; 948 } 949 sc->flags &= ~TPEXCEP; /* clear exception flag */ 950 sc->dmavaddr = vaddr; 951 sc->dmatotal = len; 952 sc->dmacount = 0; 953 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 954 wtdma(sc); 955 return 1; 956 } 957 958 /* 959 * Start timer. 960 */ 961 void 962 wtclock(sc) 963 struct wt_softc *sc; 964 { 965 966 if (sc->flags & TPTIMER) 967 return; 968 sc->flags |= TPTIMER; 969 /* 970 * Some controllers seem to lose dma interrupts too often. To make the 971 * tape stream we need 1 tick timeout. 972 */ 973 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 974 wttimer, sc); 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