1 /* $NetBSD: wt.c,v 1.59 2002/10/23 09:13:25 jdolecek 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 1.59 2002/10/23 09:13:25 jdolecek 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 dev_type_open(wtopen); 151 dev_type_close(wtclose); 152 dev_type_read(wtread); 153 dev_type_write(wtwrite); 154 dev_type_ioctl(wtioctl); 155 dev_type_strategy(wtstrategy); 156 dev_type_dump(wtdump); 157 dev_type_size(wtsize); 158 159 const struct bdevsw wt_bdevsw = { 160 wtopen, wtclose, wtstrategy, wtioctl, wtdump, wtsize, D_TAPE 161 }; 162 163 const struct cdevsw wt_cdevsw = { 164 wtopen, wtclose, wtread, wtwrite, wtioctl, 165 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 166 }; 167 168 int wtwait __P((struct wt_softc *sc, int catch, char *msg)); 169 int wtcmd __P((struct wt_softc *sc, int cmd)); 170 int wtstart __P((struct wt_softc *sc, int flag, void *vaddr, size_t len)); 171 void wtdma __P((struct wt_softc *sc)); 172 void wttimer __P((void *arg)); 173 void wtclock __P((struct wt_softc *sc)); 174 int wtreset __P((bus_space_tag_t, bus_space_handle_t, struct wtregs *)); 175 int wtsense __P((struct wt_softc *sc, int verbose, int ignore)); 176 int wtstatus __P((struct wt_softc *sc)); 177 void wtrewind __P((struct wt_softc *sc)); 178 int wtreadfm __P((struct wt_softc *sc)); 179 int wtwritefm __P((struct wt_softc *sc)); 180 u_char wtsoft __P((struct wt_softc *sc, int mask, int bits)); 181 182 int wtprobe __P((struct device *, struct cfdata *, void *)); 183 void wtattach __P((struct device *, struct device *, void *)); 184 int wtintr __P((void *sc)); 185 186 CFATTACH_DECL(wt, sizeof(struct wt_softc), 187 wtprobe, wtattach, NULL, NULL); 188 189 extern struct cfdriver wt_cd; 190 191 /* 192 * Probe for the presence of the device. 193 */ 194 int 195 wtprobe(parent, match, aux) 196 struct device *parent; 197 struct cfdata *match; 198 void *aux; 199 { 200 struct isa_attach_args *ia = aux; 201 bus_space_tag_t iot = ia->ia_iot; 202 bus_space_handle_t ioh; 203 int rv = 0, iosize; 204 205 if (ia->ia_nio < 1) 206 return (0); 207 if (ia->ia_nirq < 1) 208 return (0); 209 if (ia->ia_ndrq < 1); 210 211 /* Disallow wildcarded i/o address. */ 212 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 213 return (0); 214 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 215 return (0); 216 217 if (ia->ia_drq[0].ir_drq < 1 || ia->ia_drq[0].ir_drq > 3) { 218 printf("wtprobe: Bad drq=%d, should be 1..3\n", 219 ia->ia_drq[0].ir_drq); 220 return (0); 221 } 222 223 iosize = AV_NPORT; 224 225 /* Map i/o space */ 226 if (bus_space_map(iot, ia->ia_io[0].ir_addr, iosize, 0, &ioh)) 227 return 0; 228 229 /* Try Wangtek. */ 230 if (wtreset(iot, ioh, &wtregs)) { 231 iosize = WT_NPORT; /* XXX misleading */ 232 rv = 1; 233 goto done; 234 } 235 236 /* Try Archive. */ 237 if (wtreset(iot, ioh, &avregs)) { 238 iosize = AV_NPORT; 239 rv = 1; 240 goto done; 241 } 242 243 done: 244 if (rv) { 245 ia->ia_nio = 1; 246 ia->ia_io[0].ir_size = iosize; 247 248 ia->ia_nirq = 1; 249 ia->ia_ndrq = 1; 250 251 ia->ia_niomem = 0; 252 } 253 bus_space_unmap(iot, ioh, AV_NPORT); 254 return rv; 255 } 256 257 /* 258 * Device is found, configure it. 259 */ 260 void 261 wtattach(parent, self, aux) 262 struct device *parent, *self; 263 void *aux; 264 { 265 struct wt_softc *sc = (void *)self; 266 struct isa_attach_args *ia = aux; 267 bus_space_tag_t iot = ia->ia_iot; 268 bus_space_handle_t ioh; 269 bus_size_t maxsize; 270 271 /* Map i/o space */ 272 if (bus_space_map(iot, ia->ia_io[0].ir_addr, AV_NPORT, 0, &ioh)) { 273 printf(": can't map i/o space\n"); 274 return; 275 } 276 277 sc->sc_iot = iot; 278 sc->sc_ioh = ioh; 279 sc->sc_ic = ia->ia_ic; 280 281 callout_init(&sc->sc_timer_ch); 282 283 /* Try Wangtek. */ 284 if (wtreset(iot, ioh, &wtregs)) { 285 sc->type = WANGTEK; 286 memcpy(&sc->regs, &wtregs, sizeof(sc->regs)); 287 printf(": type <Wangtek>\n"); 288 goto ok; 289 } 290 291 /* Try Archive. */ 292 if (wtreset(iot, ioh, &avregs)) { 293 sc->type = ARCHIVE; 294 memcpy(&sc->regs, &avregs, sizeof(sc->regs)); 295 printf(": type <Archive>\n"); 296 /* Reset DMA. */ 297 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 298 goto ok; 299 } 300 301 /* what happened? */ 302 printf("%s: lost controller\n", self->dv_xname); 303 return; 304 305 ok: 306 sc->flags = TPSTART; /* tape is rewound */ 307 sc->dens = -1; /* unknown density */ 308 309 sc->chan = ia->ia_drq[0].ir_drq; 310 311 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->chan)) < MAXPHYS) { 312 printf("%s: max DMA size %lu is less than required %d\n", 313 sc->sc_dev.dv_xname, (u_long)maxsize, MAXPHYS); 314 return; 315 } 316 317 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 318 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 319 printf("%s: can't set up ISA DMA map\n", 320 sc->sc_dev.dv_xname); 321 return; 322 } 323 324 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 325 IST_EDGE, IPL_BIO, wtintr, sc); 326 } 327 328 int 329 wtdump(dev, blkno, va, size) 330 dev_t dev; 331 daddr_t blkno; 332 caddr_t va; 333 size_t size; 334 { 335 336 /* Not implemented. */ 337 return ENXIO; 338 } 339 340 int 341 wtsize(dev) 342 dev_t dev; 343 { 344 345 /* Not implemented. */ 346 return -1; 347 } 348 349 /* 350 * Open routine, called on every device open. 351 */ 352 int 353 wtopen(dev, flag, mode, p) 354 dev_t dev; 355 int flag; 356 int mode; 357 struct proc *p; 358 { 359 int unit = minor(dev) & T_UNIT; 360 struct wt_softc *sc; 361 int error; 362 363 sc = device_lookup(&wt_cd, unit); 364 if (sc == NULL) 365 return (ENXIO); 366 367 /* Check that device is not in use */ 368 if (sc->flags & TPINUSE) 369 return EBUSY; 370 371 /* If the tape is in rewound state, check the status and set density. */ 372 if (sc->flags & TPSTART) { 373 /* If rewind is going on, wait */ 374 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 375 return error; 376 377 /* Check the controller status */ 378 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 379 /* Bad status, reset the controller. */ 380 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 381 return EIO; 382 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 383 return EIO; 384 } 385 386 /* Set up tape density. */ 387 if (sc->dens != (minor(dev) & WT_DENSEL)) { 388 int d = 0; 389 390 switch (minor(dev) & WT_DENSEL) { 391 case WT_DENSDFLT: 392 default: 393 break; /* default density */ 394 case WT_QIC11: 395 d = QIC_FMT11; break; /* minor 010 */ 396 case WT_QIC24: 397 d = QIC_FMT24; break; /* minor 020 */ 398 case WT_QIC120: 399 d = QIC_FMT120; break; /* minor 030 */ 400 case WT_QIC150: 401 d = QIC_FMT150; break; /* minor 040 */ 402 case WT_QIC300: 403 d = QIC_FMT300; break; /* minor 050 */ 404 case WT_QIC600: 405 d = QIC_FMT600; break; /* minor 060 */ 406 } 407 if (d) { 408 /* Change tape density. */ 409 if (!wtcmd(sc, d)) 410 return EIO; 411 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 412 return EIO; 413 414 /* Check the status of the controller. */ 415 if (sc->error & TP_ILL) { 416 printf("%s: invalid tape density\n", 417 sc->sc_dev.dv_xname); 418 return ENODEV; 419 } 420 } 421 sc->dens = minor(dev) & WT_DENSEL; 422 } 423 sc->flags &= ~TPSTART; 424 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 425 return ENXIO; 426 427 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 428 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 429 430 sc->flags = TPINUSE; 431 if (flag & FREAD) 432 sc->flags |= TPREAD; 433 if (flag & FWRITE) 434 sc->flags |= TPWRITE; 435 return 0; 436 } 437 438 /* 439 * Close routine, called on last device close. 440 */ 441 int 442 wtclose(dev, flags, mode, p) 443 dev_t dev; 444 int flags; 445 int mode; 446 struct proc *p; 447 { 448 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 449 450 /* If rewind is pending, do nothing */ 451 if (sc->flags & TPREW) 452 goto done; 453 454 /* If seek forward is pending and no rewind on close, do nothing */ 455 if (sc->flags & TPRMARK) { 456 if (minor(dev) & T_NOREWIND) 457 goto done; 458 459 /* If read file mark is going on, wait */ 460 wtwait(sc, 0, "wtrfm"); 461 } 462 463 if (sc->flags & TPWANY) { 464 /* Tape was written. Write file mark. */ 465 wtwritefm(sc); 466 } 467 468 if ((minor(dev) & T_NOREWIND) == 0) { 469 /* Rewind to beginning of tape. */ 470 /* Don't wait until rewind, though. */ 471 wtrewind(sc); 472 goto done; 473 } 474 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 475 /* Space forward to after next file mark if no writing done. */ 476 /* Don't wait for completion. */ 477 wtreadfm(sc); 478 } 479 480 done: 481 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 482 free(sc->buf, M_TEMP); 483 return 0; 484 } 485 486 /* 487 * Ioctl routine. Compatible with BSD ioctls. 488 * Direct QIC-02 commands ERASE and RETENSION added. 489 * There are three possible ioctls: 490 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 491 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 492 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 493 */ 494 int 495 wtioctl(dev, cmd, addr, flag, p) 496 dev_t dev; 497 u_long cmd; 498 caddr_t addr; 499 int flag; 500 struct proc *p; 501 { 502 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 503 int error, count, op; 504 505 switch (cmd) { 506 default: 507 return EINVAL; 508 case WTQICMD: /* direct QIC command */ 509 op = *(int *)addr; 510 switch (op) { 511 default: 512 return EINVAL; 513 case QIC_ERASE: /* erase the whole tape */ 514 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 515 return EACCES; 516 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 517 return error; 518 break; 519 case QIC_RETENS: /* retension the tape */ 520 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 521 return error; 522 break; 523 } 524 /* Both ERASE and RETENS operations work like REWIND. */ 525 /* Simulate the rewind operation here. */ 526 sc->flags &= ~(TPRO | TPWO | TPVOL); 527 if (!wtcmd(sc, op)) 528 return EIO; 529 sc->flags |= TPSTART | TPREW; 530 if (op == QIC_ERASE) 531 sc->flags |= TPWANY; 532 wtclock(sc); 533 return 0; 534 case MTIOCIEOT: /* ignore EOT errors */ 535 case MTIOCEEOT: /* enable EOT errors */ 536 return 0; 537 case MTIOCGET: 538 ((struct mtget*)addr)->mt_type = 539 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 540 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 541 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 542 ((struct mtget*)addr)->mt_resid = 0; 543 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 544 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 545 return 0; 546 case MTIOCTOP: 547 break; 548 } 549 550 switch ((short)((struct mtop*)addr)->mt_op) { 551 default: 552 #if 0 553 case MTFSR: /* forward space record */ 554 case MTBSR: /* backward space record */ 555 case MTBSF: /* backward space file */ 556 #endif 557 return EINVAL; 558 case MTNOP: /* no operation, sets status only */ 559 case MTCACHE: /* enable controller cache */ 560 case MTNOCACHE: /* disable controller cache */ 561 return 0; 562 case MTREW: /* rewind */ 563 case MTOFFL: /* rewind and put the drive offline */ 564 if (sc->flags & TPREW) /* rewind is running */ 565 return 0; 566 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 567 return error; 568 wtrewind(sc); 569 return 0; 570 case MTFSF: /* forward space file */ 571 for (count = ((struct mtop*)addr)->mt_count; count > 0; 572 --count) { 573 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 574 return error; 575 if ((error = wtreadfm(sc)) != 0) 576 return error; 577 } 578 return 0; 579 case MTWEOF: /* write an end-of-file record */ 580 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 581 return EACCES; 582 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 583 return error; 584 if ((error = wtwritefm(sc)) != 0) 585 return error; 586 return 0; 587 } 588 589 #ifdef DIAGNOSTIC 590 panic("wtioctl: impossible"); 591 #endif 592 } 593 594 /* 595 * Strategy routine. 596 */ 597 void 598 wtstrategy(bp) 599 struct buf *bp; 600 { 601 struct wt_softc *sc = device_lookup(&wt_cd, minor(bp->b_dev) & T_UNIT); 602 int s; 603 604 bp->b_resid = bp->b_bcount; 605 606 /* at file marks and end of tape, we just return '0 bytes available' */ 607 if (sc->flags & TPVOL) 608 goto xit; 609 610 if (bp->b_flags & B_READ) { 611 /* Check read access and no previous write to this tape. */ 612 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 613 goto errxit; 614 615 /* For now, we assume that all data will be copied out */ 616 /* If read command outstanding, just skip down */ 617 if ((sc->flags & TPRO) == 0) { 618 if (!wtsense(sc, 1, TP_WRP)) { 619 /* Clear status. */ 620 goto errxit; 621 } 622 if (!wtcmd(sc, QIC_RDDATA)) { 623 /* Set read mode. */ 624 wtsense(sc, 1, TP_WRP); 625 goto errxit; 626 } 627 sc->flags |= TPRO | TPRANY; 628 } 629 } else { 630 /* Check write access and write protection. */ 631 /* No previous read from this tape allowed. */ 632 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 633 goto errxit; 634 635 /* If write command outstanding, just skip down */ 636 if ((sc->flags & TPWO) == 0) { 637 if (!wtsense(sc, 1, 0)) { 638 /* Clear status. */ 639 goto errxit; 640 } 641 if (!wtcmd(sc, QIC_WRTDATA)) { 642 /* Set write mode. */ 643 wtsense(sc, 1, 0); 644 goto errxit; 645 } 646 sc->flags |= TPWO | TPWANY; 647 } 648 } 649 650 if (bp->b_bcount == 0) 651 goto xit; 652 653 sc->flags &= ~TPEXCEP; 654 s = splbio(); 655 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 656 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 657 bp->b_resid -= sc->dmacount; 658 } 659 splx(s); 660 661 if (sc->flags & TPEXCEP) { 662 errxit: 663 bp->b_flags |= B_ERROR; 664 bp->b_error = EIO; 665 } 666 xit: 667 biodone(bp); 668 return; 669 } 670 671 int 672 wtread(dev, uio, flags) 673 dev_t dev; 674 struct uio *uio; 675 int flags; 676 { 677 678 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 679 } 680 681 int 682 wtwrite(dev, uio, flags) 683 dev_t dev; 684 struct uio *uio; 685 int flags; 686 { 687 688 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 689 } 690 691 /* 692 * Interrupt routine. 693 */ 694 int 695 wtintr(arg) 696 void *arg; 697 { 698 struct wt_softc *sc = arg; 699 u_char x; 700 701 /* get status */ 702 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 703 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 704 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 705 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 706 WTDBPRINT(("busy\n")); 707 return 0; /* device is busy */ 708 } 709 710 /* 711 * Check if rewind finished. 712 */ 713 if (sc->flags & TPREW) { 714 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 715 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 716 "rewind busy?\n" : "rewind finished\n")); 717 sc->flags &= ~TPREW; /* rewind finished */ 718 wtsense(sc, 1, TP_WRP); 719 wakeup((caddr_t)sc); 720 return 1; 721 } 722 723 /* 724 * Check if writing/reading of file mark finished. 725 */ 726 if (sc->flags & (TPRMARK | TPWMARK)) { 727 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 728 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 729 "marker r/w busy?\n" : "marker r/w finished\n")); 730 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 731 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 732 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 733 wakeup((caddr_t)sc); 734 return 1; 735 } 736 737 /* 738 * Do we started any i/o? If no, just return. 739 */ 740 if ((sc->flags & TPACTIVE) == 0) { 741 WTDBPRINT(("unexpected interrupt\n")); 742 return 0; 743 } 744 sc->flags &= ~TPACTIVE; 745 sc->dmacount += sc->bsize; /* increment counter */ 746 747 /* 748 * Clean up dma. 749 */ 750 if ((sc->dmaflags & DMAMODE_READ) && 751 (sc->dmatotal - sc->dmacount) < sc->bsize) { 752 /* If reading short block, copy the internal buffer 753 * to the user memory. */ 754 isa_dmadone(sc->sc_ic, sc->chan); 755 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 756 } else 757 isa_dmadone(sc->sc_ic, sc->chan); 758 759 /* 760 * On exception, check for end of file and end of volume. 761 */ 762 if ((x & sc->regs.NOEXCEP) == 0) { 763 WTDBPRINT(("i/o exception\n")); 764 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 765 if (sc->error & (TP_EOM | TP_FIL)) 766 sc->flags |= TPVOL; /* end of file */ 767 else 768 sc->flags |= TPEXCEP; /* i/o error */ 769 wakeup((caddr_t)sc); 770 return 1; 771 } 772 773 if (sc->dmacount < sc->dmatotal) { 774 /* Continue I/O. */ 775 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 776 wtdma(sc); 777 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 778 return 1; 779 } 780 if (sc->dmacount > sc->dmatotal) /* short last block */ 781 sc->dmacount = sc->dmatotal; 782 /* Wake up user level. */ 783 wakeup((caddr_t)sc); 784 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 785 return 1; 786 } 787 788 /* start the rewind operation */ 789 void 790 wtrewind(sc) 791 struct wt_softc *sc; 792 { 793 int rwmode = sc->flags & (TPRO | TPWO); 794 795 sc->flags &= ~(TPRO | TPWO | TPVOL); 796 /* 797 * Wangtek strictly follows QIC-02 standard: 798 * clearing ONLINE in read/write modes causes rewind. 799 * REWIND command is not allowed in read/write mode 800 * and gives `illegal command' error. 801 */ 802 if (sc->type == WANGTEK && rwmode) { 803 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 804 } else if (!wtcmd(sc, QIC_REWIND)) 805 return; 806 sc->flags |= TPSTART | TPREW; 807 wtclock(sc); 808 } 809 810 /* 811 * Start the `read marker' operation. 812 */ 813 int 814 wtreadfm(sc) 815 struct wt_softc *sc; 816 { 817 818 sc->flags &= ~(TPRO | TPWO | TPVOL); 819 if (!wtcmd(sc, QIC_READFM)) { 820 wtsense(sc, 1, TP_WRP); 821 return EIO; 822 } 823 sc->flags |= TPRMARK | TPRANY; 824 wtclock(sc); 825 /* Don't wait for completion here. */ 826 return 0; 827 } 828 829 /* 830 * Write marker to the tape. 831 */ 832 int 833 wtwritefm(sc) 834 struct wt_softc *sc; 835 { 836 837 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 838 sc->flags &= ~(TPRO | TPWO); 839 if (!wtcmd(sc, QIC_WRITEFM)) { 840 wtsense(sc, 1, 0); 841 return EIO; 842 } 843 sc->flags |= TPWMARK | TPWANY; 844 wtclock(sc); 845 return wtwait(sc, 0, "wtwfm"); 846 } 847 848 /* 849 * While controller status & mask == bits continue waiting. 850 */ 851 u_char 852 wtsoft(sc, mask, bits) 853 struct wt_softc *sc; 854 int mask, bits; 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 i; 860 861 862 /* Poll status port, waiting for specified bits. */ 863 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 864 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 865 if ((x & mask) != bits) 866 return x; 867 delay(1); 868 } 869 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 870 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 871 if ((x & mask) != bits) 872 return x; 873 delay(100); 874 } 875 for (;;) { /* forever */ 876 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 877 if ((x & mask) != bits) 878 return x; 879 tsleep((caddr_t)wtsoft, WTPRI, "wtsoft", 1); 880 } 881 } 882 883 /* 884 * Execute QIC command. 885 */ 886 int 887 wtcmd(sc, cmd) 888 struct wt_softc *sc; 889 int cmd; 890 { 891 bus_space_tag_t iot = sc->sc_iot; 892 bus_space_handle_t ioh = sc->sc_ioh; 893 u_char x; 894 int s; 895 896 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 897 s = splbio(); 898 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 899 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 900 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 901 splx(s); 902 return 0; 903 } 904 905 /* output the command */ 906 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 907 908 /* set request */ 909 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 910 sc->regs.REQUEST | sc->regs.ONLINE); 911 912 /* wait for ready */ 913 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 914 915 /* reset request */ 916 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 917 sc->regs.IEN | sc->regs.ONLINE); 918 919 /* wait for not ready */ 920 wtsoft(sc, sc->regs.BUSY, 0); 921 splx(s); 922 return 1; 923 } 924 925 /* wait for the end of i/o, seeking marker or rewind operation */ 926 int 927 wtwait(sc, catch, msg) 928 struct wt_softc *sc; 929 int catch; 930 char *msg; 931 { 932 int error; 933 934 WTDBPRINT(("wtwait() `%s'\n", msg)); 935 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 936 if ((error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) != 0) 937 return error; 938 return 0; 939 } 940 941 /* initialize dma for the i/o operation */ 942 void 943 wtdma(sc) 944 struct wt_softc *sc; 945 { 946 bus_space_tag_t iot = sc->sc_iot; 947 bus_space_handle_t ioh = sc->sc_ioh; 948 949 sc->flags |= TPACTIVE; 950 wtclock(sc); 951 952 if (sc->type == ARCHIVE) { 953 /* Set DMA. */ 954 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 955 } 956 957 if ((sc->dmaflags & DMAMODE_READ) && 958 (sc->dmatotal - sc->dmacount) < sc->bsize) { 959 /* Reading short block; do it through the internal buffer. */ 960 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 961 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 962 } else 963 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 964 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 965 } 966 967 /* start i/o operation */ 968 int 969 wtstart(sc, flag, vaddr, len) 970 struct wt_softc *sc; 971 int flag; 972 void *vaddr; 973 size_t len; 974 { 975 u_char x; 976 977 WTDBPRINT(("wtstart()\n")); 978 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 979 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 980 if ((x & sc->regs.NOEXCEP) == 0) { 981 sc->flags |= TPEXCEP; /* error */ 982 return 0; 983 } 984 sc->flags &= ~TPEXCEP; /* clear exception flag */ 985 sc->dmavaddr = vaddr; 986 sc->dmatotal = len; 987 sc->dmacount = 0; 988 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 989 wtdma(sc); 990 return 1; 991 } 992 993 /* 994 * Start timer. 995 */ 996 void 997 wtclock(sc) 998 struct wt_softc *sc; 999 { 1000 1001 if (sc->flags & TPTIMER) 1002 return; 1003 sc->flags |= TPTIMER; 1004 /* 1005 * Some controllers seem to lose dma interrupts too often. To make the 1006 * tape stream we need 1 tick timeout. 1007 */ 1008 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 1009 wttimer, sc); 1010 } 1011 1012 /* 1013 * Simulate an interrupt periodically while i/o is going. 1014 * This is necessary in case interrupts get eaten due to 1015 * multiple devices on a single IRQ line. 1016 */ 1017 void 1018 wttimer(arg) 1019 void *arg; 1020 { 1021 register struct wt_softc *sc = (struct wt_softc *)arg; 1022 int s; 1023 u_char status; 1024 1025 sc->flags &= ~TPTIMER; 1026 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 1027 return; 1028 1029 /* If i/o going, simulate interrupt. */ 1030 s = splbio(); 1031 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 1032 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 1033 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 1034 WTDBPRINT(("wttimer() -- ")); 1035 wtintr(sc); 1036 } 1037 splx(s); 1038 1039 /* Restart timer if i/o pending. */ 1040 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1041 wtclock(sc); 1042 } 1043 1044 /* 1045 * Perform QIC-02 and QIC-36 compatible reset sequence. 1046 */ 1047 int 1048 wtreset(iot, ioh, regs) 1049 bus_space_tag_t iot; 1050 bus_space_handle_t ioh; 1051 struct wtregs *regs; 1052 { 1053 u_char x; 1054 int i; 1055 1056 /* send reset */ 1057 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1058 delay(30); 1059 /* turn off reset */ 1060 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1061 delay(30); 1062 1063 /* Read the controller status. */ 1064 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1065 if (x == 0xff) /* no port at this address? */ 1066 return 0; 1067 1068 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1069 for (i = 0; i < 3000; ++i) { 1070 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1071 break; 1072 delay(1000); 1073 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1074 } 1075 return (x & regs->RESETMASK) == regs->RESETVAL; 1076 } 1077 1078 /* 1079 * Get controller status information. Return 0 if user i/o request should 1080 * receive an i/o error code. 1081 */ 1082 int 1083 wtsense(sc, verbose, ignore) 1084 struct wt_softc *sc; 1085 int verbose, ignore; 1086 { 1087 char *msg = 0; 1088 int error; 1089 1090 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1091 sc->flags &= ~(TPRO | TPWO); 1092 if (!wtstatus(sc)) 1093 return 0; 1094 if ((sc->error & TP_ST0) == 0) 1095 sc->error &= ~TP_ST0MASK; 1096 if ((sc->error & TP_ST1) == 0) 1097 sc->error &= ~TP_ST1MASK; 1098 sc->error &= ~ignore; /* ignore certain errors */ 1099 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1100 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1101 if (!error) 1102 return 1; 1103 if (!verbose) 1104 return 0; 1105 1106 /* lifted from tdriver.c from Wangtek */ 1107 if (error & TP_USL) 1108 msg = "Drive not online"; 1109 else if (error & TP_CNI) 1110 msg = "No cartridge"; 1111 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1112 msg = "Tape is write protected"; 1113 sc->flags |= TPWP; 1114 } else if (error & TP_FIL) 1115 msg = 0 /*"Filemark detected"*/; 1116 else if (error & TP_EOM) 1117 msg = 0 /*"End of tape"*/; 1118 else if (error & TP_BNL) 1119 msg = "Block not located"; 1120 else if (error & TP_UDA) 1121 msg = "Unrecoverable data error"; 1122 else if (error & TP_NDT) 1123 msg = "No data detected"; 1124 else if (error & TP_ILL) 1125 msg = "Illegal command"; 1126 if (msg) 1127 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 1128 return 0; 1129 } 1130 1131 /* 1132 * Get controller status information. 1133 */ 1134 int 1135 wtstatus(sc) 1136 struct wt_softc *sc; 1137 { 1138 bus_space_tag_t iot = sc->sc_iot; 1139 bus_space_handle_t ioh = sc->sc_ioh; 1140 char *p; 1141 int s; 1142 1143 s = splbio(); 1144 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1145 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1146 /* send `read status' command */ 1147 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1148 1149 /* set request */ 1150 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1151 sc->regs.REQUEST | sc->regs.ONLINE); 1152 1153 /* wait for ready */ 1154 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1155 /* reset request */ 1156 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1157 1158 /* wait for not ready */ 1159 wtsoft(sc, sc->regs.BUSY, 0); 1160 1161 p = (char *)&sc->error; 1162 while (p < (char *)&sc->error + 6) { 1163 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1164 sc->regs.BUSY | sc->regs.NOEXCEP); 1165 1166 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1167 splx(s); 1168 return 0; 1169 } 1170 1171 /* read status byte */ 1172 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1173 1174 /* set request */ 1175 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1176 sc->regs.REQUEST | sc->regs.ONLINE); 1177 1178 /* wait for not ready */ 1179 wtsoft(sc, sc->regs.BUSY, 0); 1180 1181 /* unset request */ 1182 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1183 } 1184 splx(s); 1185 return 1; 1186 } 1187