1 /* $NetBSD: wt.c,v 1.53 2001/11/13 08:01:35 lukem 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/cdefs.h> 54 __KERNEL_RCSID(0, "$NetBSD: wt.c,v 1.53 2001/11/13 08:01:35 lukem Exp $"); 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/callout.h> 59 #include <sys/kernel.h> 60 #include <sys/buf.h> 61 #include <sys/fcntl.h> 62 #include <sys/malloc.h> 63 #include <sys/ioctl.h> 64 #include <sys/mtio.h> 65 #include <sys/device.h> 66 #include <sys/proc.h> 67 #include <sys/conf.h> 68 69 #include <machine/intr.h> 70 #include <machine/bus.h> 71 #include <machine/pio.h> 72 73 #include <dev/isa/isavar.h> 74 #include <dev/isa/isadmavar.h> 75 #include <dev/isa/wtreg.h> 76 77 /* 78 * Uncomment this to enable internal device tracing. 79 */ 80 #define WTDBPRINT(x) /* printf x */ 81 82 #define WTPRI (PZERO+10) /* sleep priority */ 83 84 #define WT_NPORT 2 /* 2 i/o ports */ 85 #define AV_NPORT 4 /* 4 i/o ports */ 86 87 enum wttype { 88 UNKNOWN = 0, /* unknown type, driver disabled */ 89 ARCHIVE, /* Archive Viper SC499, SC402 etc */ 90 WANGTEK, /* Wangtek */ 91 }; 92 93 static struct wtregs { 94 /* controller ports */ 95 int DATAPORT, /* data, read only */ 96 CMDPORT, /* command, write only */ 97 STATPORT, /* status, read only */ 98 CTLPORT, /* control, write only */ 99 SDMAPORT, /* start dma */ 100 RDMAPORT; /* reset dma */ 101 /* status port bits */ 102 u_char BUSY, /* not ready bit define */ 103 NOEXCEP, /* no exception bit define */ 104 RESETMASK, /* to check after reset */ 105 RESETVAL, /* state after reset */ 106 /* control port bits */ 107 ONLINE, /* device selected */ 108 RESET, /* reset command */ 109 REQUEST, /* request command */ 110 IEN; /* enable interrupts */ 111 } wtregs = { 112 1, 1, 0, 0, 0, 0, 113 0x01, 0x02, 0x07, 0x05, 114 0x01, 0x02, 0x04, 0x08 115 }, avregs = { 116 0, 0, 1, 1, 2, 3, 117 0x40, 0x20, 0xf8, 0x50, 118 0, 0x80, 0x40, 0x20 119 }; 120 121 struct wt_softc { 122 struct device sc_dev; 123 void *sc_ih; 124 125 bus_space_tag_t sc_iot; 126 bus_space_handle_t sc_ioh; 127 isa_chipset_tag_t sc_ic; 128 129 struct callout sc_timer_ch; 130 131 enum wttype type; /* type of controller */ 132 int chan; /* dma channel number, 1..3 */ 133 int flags; /* state of tape drive */ 134 unsigned dens; /* tape density */ 135 int bsize; /* tape block size */ 136 void *buf; /* internal i/o buffer */ 137 138 void *dmavaddr; /* virtual address of dma i/o buffer */ 139 size_t dmatotal; /* size of i/o buffer */ 140 int dmaflags; /* i/o direction */ 141 size_t dmacount; /* resulting length of dma i/o */ 142 143 u_short error; /* code for error encountered */ 144 u_short ercnt; /* number of error blocks */ 145 u_short urcnt; /* number of underruns */ 146 147 struct wtregs regs; 148 }; 149 150 /* XXX: These don't belong here really */ 151 cdev_decl(wt); 152 bdev_decl(wt); 153 154 int wtwait __P((struct wt_softc *sc, int catch, char *msg)); 155 int wtcmd __P((struct wt_softc *sc, int cmd)); 156 int wtstart __P((struct wt_softc *sc, int flag, void *vaddr, size_t len)); 157 void wtdma __P((struct wt_softc *sc)); 158 void wttimer __P((void *arg)); 159 void wtclock __P((struct wt_softc *sc)); 160 int wtreset __P((bus_space_tag_t, bus_space_handle_t, struct wtregs *)); 161 int wtsense __P((struct wt_softc *sc, int verbose, int ignore)); 162 int wtstatus __P((struct wt_softc *sc)); 163 void wtrewind __P((struct wt_softc *sc)); 164 int wtreadfm __P((struct wt_softc *sc)); 165 int wtwritefm __P((struct wt_softc *sc)); 166 u_char wtsoft __P((struct wt_softc *sc, int mask, int bits)); 167 168 int wtprobe __P((struct device *, struct cfdata *, void *)); 169 void wtattach __P((struct device *, struct device *, void *)); 170 int wtintr __P((void *sc)); 171 172 struct cfattach wt_ca = { 173 sizeof(struct wt_softc), wtprobe, wtattach 174 }; 175 176 extern struct cfdriver wt_cd; 177 178 /* 179 * Probe for the presence of the device. 180 */ 181 int 182 wtprobe(parent, match, aux) 183 struct device *parent; 184 struct cfdata *match; 185 void *aux; 186 { 187 struct isa_attach_args *ia = aux; 188 bus_space_tag_t iot = ia->ia_iot; 189 bus_space_handle_t ioh; 190 int rv = 0; 191 192 193 /* Disallow wildcarded i/o address. */ 194 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 195 return (0); 196 197 if (ia->ia_drq < 1 || ia->ia_drq > 3) { 198 printf("wtprobe: Bad drq=%d, should be 1..3\n", ia->ia_drq); 199 return (0); 200 } 201 202 /* Map i/o space */ 203 if (bus_space_map(iot, ia->ia_iobase, AV_NPORT, 0, &ioh)) 204 return 0; 205 206 /* Try Wangtek. */ 207 if (wtreset(iot, ioh, &wtregs)) { 208 ia->ia_iosize = WT_NPORT; /* XXX misleading */ 209 rv = 1; 210 goto done; 211 } 212 213 /* Try Archive. */ 214 if (wtreset(iot, ioh, &avregs)) { 215 ia->ia_iosize = AV_NPORT; 216 rv = 1; 217 goto done; 218 } 219 220 done: 221 bus_space_unmap(iot, ioh, AV_NPORT); 222 return rv; 223 } 224 225 /* 226 * Device is found, configure it. 227 */ 228 void 229 wtattach(parent, self, aux) 230 struct device *parent, *self; 231 void *aux; 232 { 233 struct wt_softc *sc = (void *)self; 234 struct isa_attach_args *ia = aux; 235 bus_space_tag_t iot = ia->ia_iot; 236 bus_space_handle_t ioh; 237 bus_size_t maxsize; 238 239 /* Map i/o space */ 240 if (bus_space_map(iot, ia->ia_iobase, AV_NPORT, 0, &ioh)) { 241 printf(": can't map i/o space\n"); 242 return; 243 } 244 245 sc->sc_iot = iot; 246 sc->sc_ioh = ioh; 247 sc->sc_ic = ia->ia_ic; 248 249 callout_init(&sc->sc_timer_ch); 250 251 /* Try Wangtek. */ 252 if (wtreset(iot, ioh, &wtregs)) { 253 sc->type = WANGTEK; 254 memcpy(&sc->regs, &wtregs, sizeof(sc->regs)); 255 printf(": type <Wangtek>\n"); 256 goto ok; 257 } 258 259 /* Try Archive. */ 260 if (wtreset(iot, ioh, &avregs)) { 261 sc->type = ARCHIVE; 262 memcpy(&sc->regs, &avregs, sizeof(sc->regs)); 263 printf(": type <Archive>\n"); 264 /* Reset DMA. */ 265 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 266 goto ok; 267 } 268 269 /* what happened? */ 270 printf("%s: lost controller\n", self->dv_xname); 271 return; 272 273 ok: 274 sc->flags = TPSTART; /* tape is rewound */ 275 sc->dens = -1; /* unknown density */ 276 277 sc->chan = ia->ia_drq; 278 279 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->chan)) < MAXPHYS) { 280 printf("%s: max DMA size %lu is less than required %d\n", 281 sc->sc_dev.dv_xname, (u_long)maxsize, MAXPHYS); 282 return; 283 } 284 285 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 286 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 287 printf("%s: can't set up ISA DMA map\n", 288 sc->sc_dev.dv_xname); 289 return; 290 } 291 292 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 293 IPL_BIO, wtintr, sc); 294 } 295 296 int 297 wtdump(dev, blkno, va, size) 298 dev_t dev; 299 daddr_t blkno; 300 caddr_t va; 301 size_t size; 302 { 303 304 /* Not implemented. */ 305 return ENXIO; 306 } 307 308 int 309 wtsize(dev) 310 dev_t dev; 311 { 312 313 /* Not implemented. */ 314 return -1; 315 } 316 317 /* 318 * Open routine, called on every device open. 319 */ 320 int 321 wtopen(dev, flag, mode, p) 322 dev_t dev; 323 int flag; 324 int mode; 325 struct proc *p; 326 { 327 int unit = minor(dev) & T_UNIT; 328 struct wt_softc *sc; 329 int error; 330 331 sc = device_lookup(&wt_cd, unit); 332 if (sc == NULL) 333 return (ENXIO); 334 335 /* Check that device is not in use */ 336 if (sc->flags & TPINUSE) 337 return EBUSY; 338 339 /* If the tape is in rewound state, check the status and set density. */ 340 if (sc->flags & TPSTART) { 341 /* If rewind is going on, wait */ 342 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 343 return error; 344 345 /* Check the controller status */ 346 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 347 /* Bad status, reset the controller. */ 348 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 349 return EIO; 350 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 351 return EIO; 352 } 353 354 /* Set up tape density. */ 355 if (sc->dens != (minor(dev) & WT_DENSEL)) { 356 int d = 0; 357 358 switch (minor(dev) & WT_DENSEL) { 359 case WT_DENSDFLT: 360 default: 361 break; /* default density */ 362 case WT_QIC11: 363 d = QIC_FMT11; break; /* minor 010 */ 364 case WT_QIC24: 365 d = QIC_FMT24; break; /* minor 020 */ 366 case WT_QIC120: 367 d = QIC_FMT120; break; /* minor 030 */ 368 case WT_QIC150: 369 d = QIC_FMT150; break; /* minor 040 */ 370 case WT_QIC300: 371 d = QIC_FMT300; break; /* minor 050 */ 372 case WT_QIC600: 373 d = QIC_FMT600; break; /* minor 060 */ 374 } 375 if (d) { 376 /* Change tape density. */ 377 if (!wtcmd(sc, d)) 378 return EIO; 379 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 380 return EIO; 381 382 /* Check the status of the controller. */ 383 if (sc->error & TP_ILL) { 384 printf("%s: invalid tape density\n", 385 sc->sc_dev.dv_xname); 386 return ENODEV; 387 } 388 } 389 sc->dens = minor(dev) & WT_DENSEL; 390 } 391 sc->flags &= ~TPSTART; 392 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 393 return ENXIO; 394 395 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 396 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 397 398 sc->flags = TPINUSE; 399 if (flag & FREAD) 400 sc->flags |= TPREAD; 401 if (flag & FWRITE) 402 sc->flags |= TPWRITE; 403 return 0; 404 } 405 406 /* 407 * Close routine, called on last device close. 408 */ 409 int 410 wtclose(dev, flags, mode, p) 411 dev_t dev; 412 int flags; 413 int mode; 414 struct proc *p; 415 { 416 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 417 418 /* If rewind is pending, do nothing */ 419 if (sc->flags & TPREW) 420 goto done; 421 422 /* If seek forward is pending and no rewind on close, do nothing */ 423 if (sc->flags & TPRMARK) { 424 if (minor(dev) & T_NOREWIND) 425 goto done; 426 427 /* If read file mark is going on, wait */ 428 wtwait(sc, 0, "wtrfm"); 429 } 430 431 if (sc->flags & TPWANY) { 432 /* Tape was written. Write file mark. */ 433 wtwritefm(sc); 434 } 435 436 if ((minor(dev) & T_NOREWIND) == 0) { 437 /* Rewind to beginning of tape. */ 438 /* Don't wait until rewind, though. */ 439 wtrewind(sc); 440 goto done; 441 } 442 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 443 /* Space forward to after next file mark if no writing done. */ 444 /* Don't wait for completion. */ 445 wtreadfm(sc); 446 } 447 448 done: 449 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 450 free(sc->buf, M_TEMP); 451 return 0; 452 } 453 454 /* 455 * Ioctl routine. Compatible with BSD ioctls. 456 * Direct QIC-02 commands ERASE and RETENSION added. 457 * There are three possible ioctls: 458 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 459 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 460 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 461 */ 462 int 463 wtioctl(dev, cmd, addr, flag, p) 464 dev_t dev; 465 u_long cmd; 466 caddr_t addr; 467 int flag; 468 struct proc *p; 469 { 470 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 471 int error, count, op; 472 473 switch (cmd) { 474 default: 475 return EINVAL; 476 case WTQICMD: /* direct QIC command */ 477 op = *(int *)addr; 478 switch (op) { 479 default: 480 return EINVAL; 481 case QIC_ERASE: /* erase the whole tape */ 482 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 483 return EACCES; 484 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 485 return error; 486 break; 487 case QIC_RETENS: /* retension the tape */ 488 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 489 return error; 490 break; 491 } 492 /* Both ERASE and RETENS operations work like REWIND. */ 493 /* Simulate the rewind operation here. */ 494 sc->flags &= ~(TPRO | TPWO | TPVOL); 495 if (!wtcmd(sc, op)) 496 return EIO; 497 sc->flags |= TPSTART | TPREW; 498 if (op == QIC_ERASE) 499 sc->flags |= TPWANY; 500 wtclock(sc); 501 return 0; 502 case MTIOCIEOT: /* ignore EOT errors */ 503 case MTIOCEEOT: /* enable EOT errors */ 504 return 0; 505 case MTIOCGET: 506 ((struct mtget*)addr)->mt_type = 507 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 508 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 509 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 510 ((struct mtget*)addr)->mt_resid = 0; 511 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 512 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 513 return 0; 514 case MTIOCTOP: 515 break; 516 } 517 518 switch ((short)((struct mtop*)addr)->mt_op) { 519 default: 520 #if 0 521 case MTFSR: /* forward space record */ 522 case MTBSR: /* backward space record */ 523 case MTBSF: /* backward space file */ 524 #endif 525 return EINVAL; 526 case MTNOP: /* no operation, sets status only */ 527 case MTCACHE: /* enable controller cache */ 528 case MTNOCACHE: /* disable controller cache */ 529 return 0; 530 case MTREW: /* rewind */ 531 case MTOFFL: /* rewind and put the drive offline */ 532 if (sc->flags & TPREW) /* rewind is running */ 533 return 0; 534 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 535 return error; 536 wtrewind(sc); 537 return 0; 538 case MTFSF: /* forward space file */ 539 for (count = ((struct mtop*)addr)->mt_count; count > 0; 540 --count) { 541 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 542 return error; 543 if ((error = wtreadfm(sc)) != 0) 544 return error; 545 } 546 return 0; 547 case MTWEOF: /* write an end-of-file record */ 548 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 549 return EACCES; 550 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 551 return error; 552 if ((error = wtwritefm(sc)) != 0) 553 return error; 554 return 0; 555 } 556 557 #ifdef DIAGNOSTIC 558 panic("wtioctl: impossible"); 559 #endif 560 } 561 562 /* 563 * Strategy routine. 564 */ 565 void 566 wtstrategy(bp) 567 struct buf *bp; 568 { 569 struct wt_softc *sc = device_lookup(&wt_cd, minor(bp->b_dev) & T_UNIT); 570 int s; 571 572 bp->b_resid = bp->b_bcount; 573 574 /* at file marks and end of tape, we just return '0 bytes available' */ 575 if (sc->flags & TPVOL) 576 goto xit; 577 578 if (bp->b_flags & B_READ) { 579 /* Check read access and no previous write to this tape. */ 580 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 581 goto errxit; 582 583 /* For now, we assume that all data will be copied out */ 584 /* If read command outstanding, just skip down */ 585 if ((sc->flags & TPRO) == 0) { 586 if (!wtsense(sc, 1, TP_WRP)) { 587 /* Clear status. */ 588 goto errxit; 589 } 590 if (!wtcmd(sc, QIC_RDDATA)) { 591 /* Set read mode. */ 592 wtsense(sc, 1, TP_WRP); 593 goto errxit; 594 } 595 sc->flags |= TPRO | TPRANY; 596 } 597 } else { 598 /* Check write access and write protection. */ 599 /* No previous read from this tape allowed. */ 600 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 601 goto errxit; 602 603 /* If write command outstanding, just skip down */ 604 if ((sc->flags & TPWO) == 0) { 605 if (!wtsense(sc, 1, 0)) { 606 /* Clear status. */ 607 goto errxit; 608 } 609 if (!wtcmd(sc, QIC_WRTDATA)) { 610 /* Set write mode. */ 611 wtsense(sc, 1, 0); 612 goto errxit; 613 } 614 sc->flags |= TPWO | TPWANY; 615 } 616 } 617 618 if (bp->b_bcount == 0) 619 goto xit; 620 621 sc->flags &= ~TPEXCEP; 622 s = splbio(); 623 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 624 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 625 bp->b_resid -= sc->dmacount; 626 } 627 splx(s); 628 629 if (sc->flags & TPEXCEP) { 630 errxit: 631 bp->b_flags |= B_ERROR; 632 bp->b_error = EIO; 633 } 634 xit: 635 biodone(bp); 636 return; 637 } 638 639 int 640 wtread(dev, uio, flags) 641 dev_t dev; 642 struct uio *uio; 643 int flags; 644 { 645 646 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 647 } 648 649 int 650 wtwrite(dev, uio, flags) 651 dev_t dev; 652 struct uio *uio; 653 int flags; 654 { 655 656 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 657 } 658 659 /* 660 * Interrupt routine. 661 */ 662 int 663 wtintr(arg) 664 void *arg; 665 { 666 struct wt_softc *sc = arg; 667 u_char x; 668 669 /* get status */ 670 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 671 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 672 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 673 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 674 WTDBPRINT(("busy\n")); 675 return 0; /* device is busy */ 676 } 677 678 /* 679 * Check if rewind finished. 680 */ 681 if (sc->flags & TPREW) { 682 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 683 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 684 "rewind busy?\n" : "rewind finished\n")); 685 sc->flags &= ~TPREW; /* rewind finished */ 686 wtsense(sc, 1, TP_WRP); 687 wakeup((caddr_t)sc); 688 return 1; 689 } 690 691 /* 692 * Check if writing/reading of file mark finished. 693 */ 694 if (sc->flags & (TPRMARK | TPWMARK)) { 695 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 696 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 697 "marker r/w busy?\n" : "marker r/w finished\n")); 698 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 699 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 700 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 701 wakeup((caddr_t)sc); 702 return 1; 703 } 704 705 /* 706 * Do we started any i/o? If no, just return. 707 */ 708 if ((sc->flags & TPACTIVE) == 0) { 709 WTDBPRINT(("unexpected interrupt\n")); 710 return 0; 711 } 712 sc->flags &= ~TPACTIVE; 713 sc->dmacount += sc->bsize; /* increment counter */ 714 715 /* 716 * Clean up dma. 717 */ 718 if ((sc->dmaflags & DMAMODE_READ) && 719 (sc->dmatotal - sc->dmacount) < sc->bsize) { 720 /* If reading short block, copy the internal buffer 721 * to the user memory. */ 722 isa_dmadone(sc->sc_ic, sc->chan); 723 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 724 } else 725 isa_dmadone(sc->sc_ic, sc->chan); 726 727 /* 728 * On exception, check for end of file and end of volume. 729 */ 730 if ((x & sc->regs.NOEXCEP) == 0) { 731 WTDBPRINT(("i/o exception\n")); 732 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 733 if (sc->error & (TP_EOM | TP_FIL)) 734 sc->flags |= TPVOL; /* end of file */ 735 else 736 sc->flags |= TPEXCEP; /* i/o error */ 737 wakeup((caddr_t)sc); 738 return 1; 739 } 740 741 if (sc->dmacount < sc->dmatotal) { 742 /* Continue I/O. */ 743 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 744 wtdma(sc); 745 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 746 return 1; 747 } 748 if (sc->dmacount > sc->dmatotal) /* short last block */ 749 sc->dmacount = sc->dmatotal; 750 /* Wake up user level. */ 751 wakeup((caddr_t)sc); 752 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 753 return 1; 754 } 755 756 /* start the rewind operation */ 757 void 758 wtrewind(sc) 759 struct wt_softc *sc; 760 { 761 int rwmode = sc->flags & (TPRO | TPWO); 762 763 sc->flags &= ~(TPRO | TPWO | TPVOL); 764 /* 765 * Wangtek strictly follows QIC-02 standard: 766 * clearing ONLINE in read/write modes causes rewind. 767 * REWIND command is not allowed in read/write mode 768 * and gives `illegal command' error. 769 */ 770 if (sc->type == WANGTEK && rwmode) { 771 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 772 } else if (!wtcmd(sc, QIC_REWIND)) 773 return; 774 sc->flags |= TPSTART | TPREW; 775 wtclock(sc); 776 } 777 778 /* 779 * Start the `read marker' operation. 780 */ 781 int 782 wtreadfm(sc) 783 struct wt_softc *sc; 784 { 785 786 sc->flags &= ~(TPRO | TPWO | TPVOL); 787 if (!wtcmd(sc, QIC_READFM)) { 788 wtsense(sc, 1, TP_WRP); 789 return EIO; 790 } 791 sc->flags |= TPRMARK | TPRANY; 792 wtclock(sc); 793 /* Don't wait for completion here. */ 794 return 0; 795 } 796 797 /* 798 * Write marker to the tape. 799 */ 800 int 801 wtwritefm(sc) 802 struct wt_softc *sc; 803 { 804 805 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 806 sc->flags &= ~(TPRO | TPWO); 807 if (!wtcmd(sc, QIC_WRITEFM)) { 808 wtsense(sc, 1, 0); 809 return EIO; 810 } 811 sc->flags |= TPWMARK | TPWANY; 812 wtclock(sc); 813 return wtwait(sc, 0, "wtwfm"); 814 } 815 816 /* 817 * While controller status & mask == bits continue waiting. 818 */ 819 u_char 820 wtsoft(sc, mask, bits) 821 struct wt_softc *sc; 822 int mask, bits; 823 { 824 bus_space_tag_t iot = sc->sc_iot; 825 bus_space_handle_t ioh = sc->sc_ioh; 826 u_char x; 827 int i; 828 829 830 /* Poll status port, waiting for specified bits. */ 831 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 832 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 833 if ((x & mask) != bits) 834 return x; 835 delay(1); 836 } 837 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 838 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 839 if ((x & mask) != bits) 840 return x; 841 delay(100); 842 } 843 for (;;) { /* forever */ 844 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 845 if ((x & mask) != bits) 846 return x; 847 tsleep((caddr_t)wtsoft, WTPRI, "wtsoft", 1); 848 } 849 } 850 851 /* 852 * Execute QIC command. 853 */ 854 int 855 wtcmd(sc, cmd) 856 struct wt_softc *sc; 857 int cmd; 858 { 859 bus_space_tag_t iot = sc->sc_iot; 860 bus_space_handle_t ioh = sc->sc_ioh; 861 u_char x; 862 int s; 863 864 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 865 s = splbio(); 866 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 867 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 868 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 869 splx(s); 870 return 0; 871 } 872 873 /* output the command */ 874 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 875 876 /* set request */ 877 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 878 sc->regs.REQUEST | sc->regs.ONLINE); 879 880 /* wait for ready */ 881 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 882 883 /* reset request */ 884 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 885 sc->regs.IEN | sc->regs.ONLINE); 886 887 /* wait for not ready */ 888 wtsoft(sc, sc->regs.BUSY, 0); 889 splx(s); 890 return 1; 891 } 892 893 /* wait for the end of i/o, seeking marker or rewind operation */ 894 int 895 wtwait(sc, catch, msg) 896 struct wt_softc *sc; 897 int catch; 898 char *msg; 899 { 900 int error; 901 902 WTDBPRINT(("wtwait() `%s'\n", msg)); 903 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 904 if ((error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) != 0) 905 return error; 906 return 0; 907 } 908 909 /* initialize dma for the i/o operation */ 910 void 911 wtdma(sc) 912 struct wt_softc *sc; 913 { 914 bus_space_tag_t iot = sc->sc_iot; 915 bus_space_handle_t ioh = sc->sc_ioh; 916 917 sc->flags |= TPACTIVE; 918 wtclock(sc); 919 920 if (sc->type == ARCHIVE) { 921 /* Set DMA. */ 922 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 923 } 924 925 if ((sc->dmaflags & DMAMODE_READ) && 926 (sc->dmatotal - sc->dmacount) < sc->bsize) { 927 /* Reading short block; do it through the internal buffer. */ 928 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 929 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 930 } else 931 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 932 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 933 } 934 935 /* start i/o operation */ 936 int 937 wtstart(sc, flag, vaddr, len) 938 struct wt_softc *sc; 939 int flag; 940 void *vaddr; 941 size_t len; 942 { 943 u_char x; 944 945 WTDBPRINT(("wtstart()\n")); 946 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 947 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 948 if ((x & sc->regs.NOEXCEP) == 0) { 949 sc->flags |= TPEXCEP; /* error */ 950 return 0; 951 } 952 sc->flags &= ~TPEXCEP; /* clear exception flag */ 953 sc->dmavaddr = vaddr; 954 sc->dmatotal = len; 955 sc->dmacount = 0; 956 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 957 wtdma(sc); 958 return 1; 959 } 960 961 /* 962 * Start timer. 963 */ 964 void 965 wtclock(sc) 966 struct wt_softc *sc; 967 { 968 969 if (sc->flags & TPTIMER) 970 return; 971 sc->flags |= TPTIMER; 972 /* 973 * Some controllers seem to lose dma interrupts too often. To make the 974 * tape stream we need 1 tick timeout. 975 */ 976 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 977 wttimer, sc); 978 } 979 980 /* 981 * Simulate an interrupt periodically while i/o is going. 982 * This is necessary in case interrupts get eaten due to 983 * multiple devices on a single IRQ line. 984 */ 985 void 986 wttimer(arg) 987 void *arg; 988 { 989 register struct wt_softc *sc = (struct wt_softc *)arg; 990 int s; 991 u_char status; 992 993 sc->flags &= ~TPTIMER; 994 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 995 return; 996 997 /* If i/o going, simulate interrupt. */ 998 s = splbio(); 999 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 1000 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 1001 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 1002 WTDBPRINT(("wttimer() -- ")); 1003 wtintr(sc); 1004 } 1005 splx(s); 1006 1007 /* Restart timer if i/o pending. */ 1008 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1009 wtclock(sc); 1010 } 1011 1012 /* 1013 * Perform QIC-02 and QIC-36 compatible reset sequence. 1014 */ 1015 int 1016 wtreset(iot, ioh, regs) 1017 bus_space_tag_t iot; 1018 bus_space_handle_t ioh; 1019 struct wtregs *regs; 1020 { 1021 u_char x; 1022 int i; 1023 1024 /* send reset */ 1025 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1026 delay(30); 1027 /* turn off reset */ 1028 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1029 delay(30); 1030 1031 /* Read the controller status. */ 1032 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1033 if (x == 0xff) /* no port at this address? */ 1034 return 0; 1035 1036 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1037 for (i = 0; i < 3000; ++i) { 1038 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1039 break; 1040 delay(1000); 1041 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1042 } 1043 return (x & regs->RESETMASK) == regs->RESETVAL; 1044 } 1045 1046 /* 1047 * Get controller status information. Return 0 if user i/o request should 1048 * receive an i/o error code. 1049 */ 1050 int 1051 wtsense(sc, verbose, ignore) 1052 struct wt_softc *sc; 1053 int verbose, ignore; 1054 { 1055 char *msg = 0; 1056 int error; 1057 1058 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1059 sc->flags &= ~(TPRO | TPWO); 1060 if (!wtstatus(sc)) 1061 return 0; 1062 if ((sc->error & TP_ST0) == 0) 1063 sc->error &= ~TP_ST0MASK; 1064 if ((sc->error & TP_ST1) == 0) 1065 sc->error &= ~TP_ST1MASK; 1066 sc->error &= ~ignore; /* ignore certain errors */ 1067 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1068 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1069 if (!error) 1070 return 1; 1071 if (!verbose) 1072 return 0; 1073 1074 /* lifted from tdriver.c from Wangtek */ 1075 if (error & TP_USL) 1076 msg = "Drive not online"; 1077 else if (error & TP_CNI) 1078 msg = "No cartridge"; 1079 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1080 msg = "Tape is write protected"; 1081 sc->flags |= TPWP; 1082 } else if (error & TP_FIL) 1083 msg = 0 /*"Filemark detected"*/; 1084 else if (error & TP_EOM) 1085 msg = 0 /*"End of tape"*/; 1086 else if (error & TP_BNL) 1087 msg = "Block not located"; 1088 else if (error & TP_UDA) 1089 msg = "Unrecoverable data error"; 1090 else if (error & TP_NDT) 1091 msg = "No data detected"; 1092 else if (error & TP_ILL) 1093 msg = "Illegal command"; 1094 if (msg) 1095 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 1096 return 0; 1097 } 1098 1099 /* 1100 * Get controller status information. 1101 */ 1102 int 1103 wtstatus(sc) 1104 struct wt_softc *sc; 1105 { 1106 bus_space_tag_t iot = sc->sc_iot; 1107 bus_space_handle_t ioh = sc->sc_ioh; 1108 char *p; 1109 int s; 1110 1111 s = splbio(); 1112 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1113 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1114 /* send `read status' command */ 1115 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1116 1117 /* set request */ 1118 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1119 sc->regs.REQUEST | sc->regs.ONLINE); 1120 1121 /* wait for ready */ 1122 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1123 /* reset request */ 1124 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1125 1126 /* wait for not ready */ 1127 wtsoft(sc, sc->regs.BUSY, 0); 1128 1129 p = (char *)&sc->error; 1130 while (p < (char *)&sc->error + 6) { 1131 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1132 sc->regs.BUSY | sc->regs.NOEXCEP); 1133 1134 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1135 splx(s); 1136 return 0; 1137 } 1138 1139 /* read status byte */ 1140 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1141 1142 /* set request */ 1143 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1144 sc->regs.REQUEST | sc->regs.ONLINE); 1145 1146 /* wait for not ready */ 1147 wtsoft(sc, sc->regs.BUSY, 0); 1148 1149 /* unset request */ 1150 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1151 } 1152 splx(s); 1153 return 1; 1154 } 1155