1 /* $NetBSD: wt.c,v 1.54 2002/01/07 21:47:14 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/cdefs.h> 54 __KERNEL_RCSID(0, "$NetBSD: wt.c,v 1.54 2002/01/07 21:47:14 thorpej 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, iosize; 191 192 if (ia->ia_nio < 1) 193 return (0); 194 if (ia->ia_nirq < 1) 195 return (0); 196 if (ia->ia_ndrq < 1); 197 198 /* Disallow wildcarded i/o address. */ 199 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 200 return (0); 201 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 202 return (0); 203 204 if (ia->ia_drq[0].ir_drq < 1 || ia->ia_drq[0].ir_drq > 3) { 205 printf("wtprobe: Bad drq=%d, should be 1..3\n", 206 ia->ia_drq[0].ir_drq); 207 return (0); 208 } 209 210 iosize = AV_NPORT; 211 212 /* Map i/o space */ 213 if (bus_space_map(iot, ia->ia_io[0].ir_addr, iosize, 0, &ioh)) 214 return 0; 215 216 /* Try Wangtek. */ 217 if (wtreset(iot, ioh, &wtregs)) { 218 iosize = WT_NPORT; /* XXX misleading */ 219 rv = 1; 220 goto done; 221 } 222 223 /* Try Archive. */ 224 if (wtreset(iot, ioh, &avregs)) { 225 iosize = AV_NPORT; 226 rv = 1; 227 goto done; 228 } 229 230 done: 231 if (rv) { 232 ia->ia_nio = 1; 233 ia->ia_io[0].ir_size = iosize; 234 235 ia->ia_nirq = 1; 236 ia->ia_ndrq = 1; 237 238 ia->ia_niomem = 0; 239 } 240 bus_space_unmap(iot, ioh, AV_NPORT); 241 return rv; 242 } 243 244 /* 245 * Device is found, configure it. 246 */ 247 void 248 wtattach(parent, self, aux) 249 struct device *parent, *self; 250 void *aux; 251 { 252 struct wt_softc *sc = (void *)self; 253 struct isa_attach_args *ia = aux; 254 bus_space_tag_t iot = ia->ia_iot; 255 bus_space_handle_t ioh; 256 bus_size_t maxsize; 257 258 /* Map i/o space */ 259 if (bus_space_map(iot, ia->ia_io[0].ir_addr, AV_NPORT, 0, &ioh)) { 260 printf(": can't map i/o space\n"); 261 return; 262 } 263 264 sc->sc_iot = iot; 265 sc->sc_ioh = ioh; 266 sc->sc_ic = ia->ia_ic; 267 268 callout_init(&sc->sc_timer_ch); 269 270 /* Try Wangtek. */ 271 if (wtreset(iot, ioh, &wtregs)) { 272 sc->type = WANGTEK; 273 memcpy(&sc->regs, &wtregs, sizeof(sc->regs)); 274 printf(": type <Wangtek>\n"); 275 goto ok; 276 } 277 278 /* Try Archive. */ 279 if (wtreset(iot, ioh, &avregs)) { 280 sc->type = ARCHIVE; 281 memcpy(&sc->regs, &avregs, sizeof(sc->regs)); 282 printf(": type <Archive>\n"); 283 /* Reset DMA. */ 284 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 285 goto ok; 286 } 287 288 /* what happened? */ 289 printf("%s: lost controller\n", self->dv_xname); 290 return; 291 292 ok: 293 sc->flags = TPSTART; /* tape is rewound */ 294 sc->dens = -1; /* unknown density */ 295 296 sc->chan = ia->ia_drq[0].ir_drq; 297 298 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->chan)) < MAXPHYS) { 299 printf("%s: max DMA size %lu is less than required %d\n", 300 sc->sc_dev.dv_xname, (u_long)maxsize, MAXPHYS); 301 return; 302 } 303 304 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 305 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 306 printf("%s: can't set up ISA DMA map\n", 307 sc->sc_dev.dv_xname); 308 return; 309 } 310 311 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 312 IST_EDGE, IPL_BIO, wtintr, sc); 313 } 314 315 int 316 wtdump(dev, blkno, va, size) 317 dev_t dev; 318 daddr_t blkno; 319 caddr_t va; 320 size_t size; 321 { 322 323 /* Not implemented. */ 324 return ENXIO; 325 } 326 327 int 328 wtsize(dev) 329 dev_t dev; 330 { 331 332 /* Not implemented. */ 333 return -1; 334 } 335 336 /* 337 * Open routine, called on every device open. 338 */ 339 int 340 wtopen(dev, flag, mode, p) 341 dev_t dev; 342 int flag; 343 int mode; 344 struct proc *p; 345 { 346 int unit = minor(dev) & T_UNIT; 347 struct wt_softc *sc; 348 int error; 349 350 sc = device_lookup(&wt_cd, unit); 351 if (sc == NULL) 352 return (ENXIO); 353 354 /* Check that device is not in use */ 355 if (sc->flags & TPINUSE) 356 return EBUSY; 357 358 /* If the tape is in rewound state, check the status and set density. */ 359 if (sc->flags & TPSTART) { 360 /* If rewind is going on, wait */ 361 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 362 return error; 363 364 /* Check the controller status */ 365 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 366 /* Bad status, reset the controller. */ 367 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 368 return EIO; 369 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 370 return EIO; 371 } 372 373 /* Set up tape density. */ 374 if (sc->dens != (minor(dev) & WT_DENSEL)) { 375 int d = 0; 376 377 switch (minor(dev) & WT_DENSEL) { 378 case WT_DENSDFLT: 379 default: 380 break; /* default density */ 381 case WT_QIC11: 382 d = QIC_FMT11; break; /* minor 010 */ 383 case WT_QIC24: 384 d = QIC_FMT24; break; /* minor 020 */ 385 case WT_QIC120: 386 d = QIC_FMT120; break; /* minor 030 */ 387 case WT_QIC150: 388 d = QIC_FMT150; break; /* minor 040 */ 389 case WT_QIC300: 390 d = QIC_FMT300; break; /* minor 050 */ 391 case WT_QIC600: 392 d = QIC_FMT600; break; /* minor 060 */ 393 } 394 if (d) { 395 /* Change tape density. */ 396 if (!wtcmd(sc, d)) 397 return EIO; 398 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 399 return EIO; 400 401 /* Check the status of the controller. */ 402 if (sc->error & TP_ILL) { 403 printf("%s: invalid tape density\n", 404 sc->sc_dev.dv_xname); 405 return ENODEV; 406 } 407 } 408 sc->dens = minor(dev) & WT_DENSEL; 409 } 410 sc->flags &= ~TPSTART; 411 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 412 return ENXIO; 413 414 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 415 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 416 417 sc->flags = TPINUSE; 418 if (flag & FREAD) 419 sc->flags |= TPREAD; 420 if (flag & FWRITE) 421 sc->flags |= TPWRITE; 422 return 0; 423 } 424 425 /* 426 * Close routine, called on last device close. 427 */ 428 int 429 wtclose(dev, flags, mode, p) 430 dev_t dev; 431 int flags; 432 int mode; 433 struct proc *p; 434 { 435 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 436 437 /* If rewind is pending, do nothing */ 438 if (sc->flags & TPREW) 439 goto done; 440 441 /* If seek forward is pending and no rewind on close, do nothing */ 442 if (sc->flags & TPRMARK) { 443 if (minor(dev) & T_NOREWIND) 444 goto done; 445 446 /* If read file mark is going on, wait */ 447 wtwait(sc, 0, "wtrfm"); 448 } 449 450 if (sc->flags & TPWANY) { 451 /* Tape was written. Write file mark. */ 452 wtwritefm(sc); 453 } 454 455 if ((minor(dev) & T_NOREWIND) == 0) { 456 /* Rewind to beginning of tape. */ 457 /* Don't wait until rewind, though. */ 458 wtrewind(sc); 459 goto done; 460 } 461 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 462 /* Space forward to after next file mark if no writing done. */ 463 /* Don't wait for completion. */ 464 wtreadfm(sc); 465 } 466 467 done: 468 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 469 free(sc->buf, M_TEMP); 470 return 0; 471 } 472 473 /* 474 * Ioctl routine. Compatible with BSD ioctls. 475 * Direct QIC-02 commands ERASE and RETENSION added. 476 * There are three possible ioctls: 477 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 478 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 479 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 480 */ 481 int 482 wtioctl(dev, cmd, addr, flag, p) 483 dev_t dev; 484 u_long cmd; 485 caddr_t addr; 486 int flag; 487 struct proc *p; 488 { 489 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 490 int error, count, op; 491 492 switch (cmd) { 493 default: 494 return EINVAL; 495 case WTQICMD: /* direct QIC command */ 496 op = *(int *)addr; 497 switch (op) { 498 default: 499 return EINVAL; 500 case QIC_ERASE: /* erase the whole tape */ 501 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 502 return EACCES; 503 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 504 return error; 505 break; 506 case QIC_RETENS: /* retension the tape */ 507 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 508 return error; 509 break; 510 } 511 /* Both ERASE and RETENS operations work like REWIND. */ 512 /* Simulate the rewind operation here. */ 513 sc->flags &= ~(TPRO | TPWO | TPVOL); 514 if (!wtcmd(sc, op)) 515 return EIO; 516 sc->flags |= TPSTART | TPREW; 517 if (op == QIC_ERASE) 518 sc->flags |= TPWANY; 519 wtclock(sc); 520 return 0; 521 case MTIOCIEOT: /* ignore EOT errors */ 522 case MTIOCEEOT: /* enable EOT errors */ 523 return 0; 524 case MTIOCGET: 525 ((struct mtget*)addr)->mt_type = 526 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 527 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 528 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 529 ((struct mtget*)addr)->mt_resid = 0; 530 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 531 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 532 return 0; 533 case MTIOCTOP: 534 break; 535 } 536 537 switch ((short)((struct mtop*)addr)->mt_op) { 538 default: 539 #if 0 540 case MTFSR: /* forward space record */ 541 case MTBSR: /* backward space record */ 542 case MTBSF: /* backward space file */ 543 #endif 544 return EINVAL; 545 case MTNOP: /* no operation, sets status only */ 546 case MTCACHE: /* enable controller cache */ 547 case MTNOCACHE: /* disable controller cache */ 548 return 0; 549 case MTREW: /* rewind */ 550 case MTOFFL: /* rewind and put the drive offline */ 551 if (sc->flags & TPREW) /* rewind is running */ 552 return 0; 553 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 554 return error; 555 wtrewind(sc); 556 return 0; 557 case MTFSF: /* forward space file */ 558 for (count = ((struct mtop*)addr)->mt_count; count > 0; 559 --count) { 560 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 561 return error; 562 if ((error = wtreadfm(sc)) != 0) 563 return error; 564 } 565 return 0; 566 case MTWEOF: /* write an end-of-file record */ 567 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 568 return EACCES; 569 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 570 return error; 571 if ((error = wtwritefm(sc)) != 0) 572 return error; 573 return 0; 574 } 575 576 #ifdef DIAGNOSTIC 577 panic("wtioctl: impossible"); 578 #endif 579 } 580 581 /* 582 * Strategy routine. 583 */ 584 void 585 wtstrategy(bp) 586 struct buf *bp; 587 { 588 struct wt_softc *sc = device_lookup(&wt_cd, minor(bp->b_dev) & T_UNIT); 589 int s; 590 591 bp->b_resid = bp->b_bcount; 592 593 /* at file marks and end of tape, we just return '0 bytes available' */ 594 if (sc->flags & TPVOL) 595 goto xit; 596 597 if (bp->b_flags & B_READ) { 598 /* Check read access and no previous write to this tape. */ 599 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 600 goto errxit; 601 602 /* For now, we assume that all data will be copied out */ 603 /* If read command outstanding, just skip down */ 604 if ((sc->flags & TPRO) == 0) { 605 if (!wtsense(sc, 1, TP_WRP)) { 606 /* Clear status. */ 607 goto errxit; 608 } 609 if (!wtcmd(sc, QIC_RDDATA)) { 610 /* Set read mode. */ 611 wtsense(sc, 1, TP_WRP); 612 goto errxit; 613 } 614 sc->flags |= TPRO | TPRANY; 615 } 616 } else { 617 /* Check write access and write protection. */ 618 /* No previous read from this tape allowed. */ 619 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 620 goto errxit; 621 622 /* If write command outstanding, just skip down */ 623 if ((sc->flags & TPWO) == 0) { 624 if (!wtsense(sc, 1, 0)) { 625 /* Clear status. */ 626 goto errxit; 627 } 628 if (!wtcmd(sc, QIC_WRTDATA)) { 629 /* Set write mode. */ 630 wtsense(sc, 1, 0); 631 goto errxit; 632 } 633 sc->flags |= TPWO | TPWANY; 634 } 635 } 636 637 if (bp->b_bcount == 0) 638 goto xit; 639 640 sc->flags &= ~TPEXCEP; 641 s = splbio(); 642 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 643 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 644 bp->b_resid -= sc->dmacount; 645 } 646 splx(s); 647 648 if (sc->flags & TPEXCEP) { 649 errxit: 650 bp->b_flags |= B_ERROR; 651 bp->b_error = EIO; 652 } 653 xit: 654 biodone(bp); 655 return; 656 } 657 658 int 659 wtread(dev, uio, flags) 660 dev_t dev; 661 struct uio *uio; 662 int flags; 663 { 664 665 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 666 } 667 668 int 669 wtwrite(dev, uio, flags) 670 dev_t dev; 671 struct uio *uio; 672 int flags; 673 { 674 675 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 676 } 677 678 /* 679 * Interrupt routine. 680 */ 681 int 682 wtintr(arg) 683 void *arg; 684 { 685 struct wt_softc *sc = arg; 686 u_char x; 687 688 /* get status */ 689 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 690 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 691 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 692 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 693 WTDBPRINT(("busy\n")); 694 return 0; /* device is busy */ 695 } 696 697 /* 698 * Check if rewind finished. 699 */ 700 if (sc->flags & TPREW) { 701 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 702 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 703 "rewind busy?\n" : "rewind finished\n")); 704 sc->flags &= ~TPREW; /* rewind finished */ 705 wtsense(sc, 1, TP_WRP); 706 wakeup((caddr_t)sc); 707 return 1; 708 } 709 710 /* 711 * Check if writing/reading of file mark finished. 712 */ 713 if (sc->flags & (TPRMARK | TPWMARK)) { 714 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 715 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 716 "marker r/w busy?\n" : "marker r/w finished\n")); 717 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 718 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 719 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 720 wakeup((caddr_t)sc); 721 return 1; 722 } 723 724 /* 725 * Do we started any i/o? If no, just return. 726 */ 727 if ((sc->flags & TPACTIVE) == 0) { 728 WTDBPRINT(("unexpected interrupt\n")); 729 return 0; 730 } 731 sc->flags &= ~TPACTIVE; 732 sc->dmacount += sc->bsize; /* increment counter */ 733 734 /* 735 * Clean up dma. 736 */ 737 if ((sc->dmaflags & DMAMODE_READ) && 738 (sc->dmatotal - sc->dmacount) < sc->bsize) { 739 /* If reading short block, copy the internal buffer 740 * to the user memory. */ 741 isa_dmadone(sc->sc_ic, sc->chan); 742 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 743 } else 744 isa_dmadone(sc->sc_ic, sc->chan); 745 746 /* 747 * On exception, check for end of file and end of volume. 748 */ 749 if ((x & sc->regs.NOEXCEP) == 0) { 750 WTDBPRINT(("i/o exception\n")); 751 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 752 if (sc->error & (TP_EOM | TP_FIL)) 753 sc->flags |= TPVOL; /* end of file */ 754 else 755 sc->flags |= TPEXCEP; /* i/o error */ 756 wakeup((caddr_t)sc); 757 return 1; 758 } 759 760 if (sc->dmacount < sc->dmatotal) { 761 /* Continue I/O. */ 762 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 763 wtdma(sc); 764 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 765 return 1; 766 } 767 if (sc->dmacount > sc->dmatotal) /* short last block */ 768 sc->dmacount = sc->dmatotal; 769 /* Wake up user level. */ 770 wakeup((caddr_t)sc); 771 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 772 return 1; 773 } 774 775 /* start the rewind operation */ 776 void 777 wtrewind(sc) 778 struct wt_softc *sc; 779 { 780 int rwmode = sc->flags & (TPRO | TPWO); 781 782 sc->flags &= ~(TPRO | TPWO | TPVOL); 783 /* 784 * Wangtek strictly follows QIC-02 standard: 785 * clearing ONLINE in read/write modes causes rewind. 786 * REWIND command is not allowed in read/write mode 787 * and gives `illegal command' error. 788 */ 789 if (sc->type == WANGTEK && rwmode) { 790 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 791 } else if (!wtcmd(sc, QIC_REWIND)) 792 return; 793 sc->flags |= TPSTART | TPREW; 794 wtclock(sc); 795 } 796 797 /* 798 * Start the `read marker' operation. 799 */ 800 int 801 wtreadfm(sc) 802 struct wt_softc *sc; 803 { 804 805 sc->flags &= ~(TPRO | TPWO | TPVOL); 806 if (!wtcmd(sc, QIC_READFM)) { 807 wtsense(sc, 1, TP_WRP); 808 return EIO; 809 } 810 sc->flags |= TPRMARK | TPRANY; 811 wtclock(sc); 812 /* Don't wait for completion here. */ 813 return 0; 814 } 815 816 /* 817 * Write marker to the tape. 818 */ 819 int 820 wtwritefm(sc) 821 struct wt_softc *sc; 822 { 823 824 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 825 sc->flags &= ~(TPRO | TPWO); 826 if (!wtcmd(sc, QIC_WRITEFM)) { 827 wtsense(sc, 1, 0); 828 return EIO; 829 } 830 sc->flags |= TPWMARK | TPWANY; 831 wtclock(sc); 832 return wtwait(sc, 0, "wtwfm"); 833 } 834 835 /* 836 * While controller status & mask == bits continue waiting. 837 */ 838 u_char 839 wtsoft(sc, mask, bits) 840 struct wt_softc *sc; 841 int mask, bits; 842 { 843 bus_space_tag_t iot = sc->sc_iot; 844 bus_space_handle_t ioh = sc->sc_ioh; 845 u_char x; 846 int i; 847 848 849 /* Poll status port, waiting for specified bits. */ 850 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 851 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 852 if ((x & mask) != bits) 853 return x; 854 delay(1); 855 } 856 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 857 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 858 if ((x & mask) != bits) 859 return x; 860 delay(100); 861 } 862 for (;;) { /* forever */ 863 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 864 if ((x & mask) != bits) 865 return x; 866 tsleep((caddr_t)wtsoft, WTPRI, "wtsoft", 1); 867 } 868 } 869 870 /* 871 * Execute QIC command. 872 */ 873 int 874 wtcmd(sc, cmd) 875 struct wt_softc *sc; 876 int cmd; 877 { 878 bus_space_tag_t iot = sc->sc_iot; 879 bus_space_handle_t ioh = sc->sc_ioh; 880 u_char x; 881 int s; 882 883 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 884 s = splbio(); 885 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 886 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 887 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 888 splx(s); 889 return 0; 890 } 891 892 /* output the command */ 893 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 894 895 /* set request */ 896 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 897 sc->regs.REQUEST | sc->regs.ONLINE); 898 899 /* wait for ready */ 900 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 901 902 /* reset request */ 903 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 904 sc->regs.IEN | sc->regs.ONLINE); 905 906 /* wait for not ready */ 907 wtsoft(sc, sc->regs.BUSY, 0); 908 splx(s); 909 return 1; 910 } 911 912 /* wait for the end of i/o, seeking marker or rewind operation */ 913 int 914 wtwait(sc, catch, msg) 915 struct wt_softc *sc; 916 int catch; 917 char *msg; 918 { 919 int error; 920 921 WTDBPRINT(("wtwait() `%s'\n", msg)); 922 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 923 if ((error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) != 0) 924 return error; 925 return 0; 926 } 927 928 /* initialize dma for the i/o operation */ 929 void 930 wtdma(sc) 931 struct wt_softc *sc; 932 { 933 bus_space_tag_t iot = sc->sc_iot; 934 bus_space_handle_t ioh = sc->sc_ioh; 935 936 sc->flags |= TPACTIVE; 937 wtclock(sc); 938 939 if (sc->type == ARCHIVE) { 940 /* Set DMA. */ 941 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 942 } 943 944 if ((sc->dmaflags & DMAMODE_READ) && 945 (sc->dmatotal - sc->dmacount) < sc->bsize) { 946 /* Reading short block; do it through the internal buffer. */ 947 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 948 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 949 } else 950 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 951 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 952 } 953 954 /* start i/o operation */ 955 int 956 wtstart(sc, flag, vaddr, len) 957 struct wt_softc *sc; 958 int flag; 959 void *vaddr; 960 size_t len; 961 { 962 u_char x; 963 964 WTDBPRINT(("wtstart()\n")); 965 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 966 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 967 if ((x & sc->regs.NOEXCEP) == 0) { 968 sc->flags |= TPEXCEP; /* error */ 969 return 0; 970 } 971 sc->flags &= ~TPEXCEP; /* clear exception flag */ 972 sc->dmavaddr = vaddr; 973 sc->dmatotal = len; 974 sc->dmacount = 0; 975 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 976 wtdma(sc); 977 return 1; 978 } 979 980 /* 981 * Start timer. 982 */ 983 void 984 wtclock(sc) 985 struct wt_softc *sc; 986 { 987 988 if (sc->flags & TPTIMER) 989 return; 990 sc->flags |= TPTIMER; 991 /* 992 * Some controllers seem to lose dma interrupts too often. To make the 993 * tape stream we need 1 tick timeout. 994 */ 995 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 996 wttimer, sc); 997 } 998 999 /* 1000 * Simulate an interrupt periodically while i/o is going. 1001 * This is necessary in case interrupts get eaten due to 1002 * multiple devices on a single IRQ line. 1003 */ 1004 void 1005 wttimer(arg) 1006 void *arg; 1007 { 1008 register struct wt_softc *sc = (struct wt_softc *)arg; 1009 int s; 1010 u_char status; 1011 1012 sc->flags &= ~TPTIMER; 1013 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 1014 return; 1015 1016 /* If i/o going, simulate interrupt. */ 1017 s = splbio(); 1018 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 1019 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 1020 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 1021 WTDBPRINT(("wttimer() -- ")); 1022 wtintr(sc); 1023 } 1024 splx(s); 1025 1026 /* Restart timer if i/o pending. */ 1027 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1028 wtclock(sc); 1029 } 1030 1031 /* 1032 * Perform QIC-02 and QIC-36 compatible reset sequence. 1033 */ 1034 int 1035 wtreset(iot, ioh, regs) 1036 bus_space_tag_t iot; 1037 bus_space_handle_t ioh; 1038 struct wtregs *regs; 1039 { 1040 u_char x; 1041 int i; 1042 1043 /* send reset */ 1044 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1045 delay(30); 1046 /* turn off reset */ 1047 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1048 delay(30); 1049 1050 /* Read the controller status. */ 1051 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1052 if (x == 0xff) /* no port at this address? */ 1053 return 0; 1054 1055 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1056 for (i = 0; i < 3000; ++i) { 1057 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1058 break; 1059 delay(1000); 1060 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1061 } 1062 return (x & regs->RESETMASK) == regs->RESETVAL; 1063 } 1064 1065 /* 1066 * Get controller status information. Return 0 if user i/o request should 1067 * receive an i/o error code. 1068 */ 1069 int 1070 wtsense(sc, verbose, ignore) 1071 struct wt_softc *sc; 1072 int verbose, ignore; 1073 { 1074 char *msg = 0; 1075 int error; 1076 1077 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1078 sc->flags &= ~(TPRO | TPWO); 1079 if (!wtstatus(sc)) 1080 return 0; 1081 if ((sc->error & TP_ST0) == 0) 1082 sc->error &= ~TP_ST0MASK; 1083 if ((sc->error & TP_ST1) == 0) 1084 sc->error &= ~TP_ST1MASK; 1085 sc->error &= ~ignore; /* ignore certain errors */ 1086 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1087 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1088 if (!error) 1089 return 1; 1090 if (!verbose) 1091 return 0; 1092 1093 /* lifted from tdriver.c from Wangtek */ 1094 if (error & TP_USL) 1095 msg = "Drive not online"; 1096 else if (error & TP_CNI) 1097 msg = "No cartridge"; 1098 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1099 msg = "Tape is write protected"; 1100 sc->flags |= TPWP; 1101 } else if (error & TP_FIL) 1102 msg = 0 /*"Filemark detected"*/; 1103 else if (error & TP_EOM) 1104 msg = 0 /*"End of tape"*/; 1105 else if (error & TP_BNL) 1106 msg = "Block not located"; 1107 else if (error & TP_UDA) 1108 msg = "Unrecoverable data error"; 1109 else if (error & TP_NDT) 1110 msg = "No data detected"; 1111 else if (error & TP_ILL) 1112 msg = "Illegal command"; 1113 if (msg) 1114 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 1115 return 0; 1116 } 1117 1118 /* 1119 * Get controller status information. 1120 */ 1121 int 1122 wtstatus(sc) 1123 struct wt_softc *sc; 1124 { 1125 bus_space_tag_t iot = sc->sc_iot; 1126 bus_space_handle_t ioh = sc->sc_ioh; 1127 char *p; 1128 int s; 1129 1130 s = splbio(); 1131 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1132 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1133 /* send `read status' command */ 1134 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1135 1136 /* set request */ 1137 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1138 sc->regs.REQUEST | sc->regs.ONLINE); 1139 1140 /* wait for ready */ 1141 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1142 /* reset request */ 1143 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1144 1145 /* wait for not ready */ 1146 wtsoft(sc, sc->regs.BUSY, 0); 1147 1148 p = (char *)&sc->error; 1149 while (p < (char *)&sc->error + 6) { 1150 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1151 sc->regs.BUSY | sc->regs.NOEXCEP); 1152 1153 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1154 splx(s); 1155 return 0; 1156 } 1157 1158 /* read status byte */ 1159 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1160 1161 /* set request */ 1162 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1163 sc->regs.REQUEST | sc->regs.ONLINE); 1164 1165 /* wait for not ready */ 1166 wtsoft(sc, sc->regs.BUSY, 0); 1167 1168 /* unset request */ 1169 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1170 } 1171 splx(s); 1172 return 1; 1173 } 1174