wt.c revision 1.30
1 /* $NetBSD: wt.c,v 1.30 1996/03/17 00:54:05 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 (at) kiae.su> 9 * Serge Vakulenko <vak (at) zebub.msk.su> 10 * 11 * This software is distributed with NO WARRANTIES, not even the implied 12 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 13 * 14 * Authors grant any other persons or organisations permission to use 15 * or modify this software as long as this message is kept with the software, 16 * all derivative works or modified versions. 17 * 18 * This driver is derived from the old 386bsd Wangtek streamer tape driver, 19 * made by Robert Baron at CMU, based on Intel sources. 20 */ 21 22 /* 23 * Copyright (c) 1989 Carnegie-Mellon University. 24 * All rights reserved. 25 * 26 * Authors: Robert Baron 27 * 28 * Permission to use, copy, modify and distribute this software and 29 * its documentation is hereby granted, provided that both the copyright 30 * notice and this permission notice appear in all copies of the 31 * software, derivative works or modified versions, and any portions 32 * thereof, and that both notices appear in supporting documentation. 33 * 34 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 35 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 36 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 37 * 38 * Carnegie Mellon requests users of this software to return to 39 * 40 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 41 * School of Computer Science 42 * Carnegie Mellon University 43 * Pittsburgh PA 15213-3890 44 * 45 * any improvements or extensions that they make and grant Carnegie the 46 * rights to redistribute these changes. 47 */ 48 49 /* 50 * Copyright 1988, 1989 by Intel Corporation 51 */ 52 53 #include <sys/param.h> 54 #include <sys/systm.h> 55 #include <sys/kernel.h> 56 #include <sys/buf.h> 57 #include <sys/fcntl.h> 58 #include <sys/malloc.h> 59 #include <sys/ioctl.h> 60 #include <sys/mtio.h> 61 #include <sys/device.h> 62 63 #include <vm/vm_param.h> 64 65 #include <machine/pio.h> 66 67 #include <dev/isa/isavar.h> 68 #include <dev/isa/isadmavar.h> 69 #include <dev/isa/wtreg.h> 70 71 /* 72 * Uncomment this to enable internal device tracing. 73 */ 74 #define WTDBPRINT(x) /* printf x */ 75 76 #define WTPRI (PZERO+10) /* sleep priority */ 77 78 /* 79 * Wangtek controller ports 80 */ 81 #define WT_CTLPORT(base) ((base)+0) /* control, write only */ 82 #define WT_STATPORT(base) ((base)+0) /* status, read only */ 83 #define WT_CMDPORT(base) ((base)+1) /* command, write only */ 84 #define WT_DATAPORT(base) ((base)+1) /* data, read only */ 85 #define WT_NPORT 2 /* 2 i/o ports */ 86 87 /* status port bits */ 88 #define WT_BUSY 0x01 /* not ready bit define */ 89 #define WT_NOEXCEP 0x02 /* no exception bit define */ 90 #define WT_RESETMASK 0x07 /* to check after reset */ 91 #define WT_RESETVAL 0x05 /* state after reset */ 92 93 /* control port bits */ 94 #define WT_ONLINE 0x01 /* device selected */ 95 #define WT_RESET 0x02 /* reset command */ 96 #define WT_REQUEST 0x04 /* request command */ 97 #define WT_IEN 0x08 /* enable dma */ 98 99 /* 100 * Archive controller ports 101 */ 102 #define AV_DATAPORT(base) ((base)+0) /* data, read only */ 103 #define AV_CMDPORT(base) ((base)+0) /* command, write only */ 104 #define AV_STATPORT(base) ((base)+1) /* status, read only */ 105 #define AV_CTLPORT(base) ((base)+1) /* control, write only */ 106 #define AV_SDMAPORT(base) ((base)+2) /* start dma */ 107 #define AV_RDMAPORT(base) ((base)+3) /* reset dma */ 108 #define AV_NPORT 4 /* 4 i/o ports */ 109 110 /* status port bits */ 111 #define AV_BUSY 0x40 /* not ready bit define */ 112 #define AV_NOEXCEP 0x20 /* no exception bit define */ 113 #define AV_RESETMASK 0xf8 /* to check after reset */ 114 #define AV_RESETVAL 0x50 /* state after reset */ 115 116 /* control port bits */ 117 #define AV_RESET 0x80 /* reset command */ 118 #define AV_REQUEST 0x40 /* request command */ 119 #define AV_IEN 0x20 /* enable interrupts */ 120 121 enum wttype { 122 UNKNOWN = 0, /* unknown type, driver disabled */ 123 ARCHIVE, /* Archive Viper SC499, SC402 etc */ 124 WANGTEK, /* Wangtek */ 125 }; 126 127 struct wt_softc { 128 struct device sc_dev; 129 void *sc_ih; 130 131 enum wttype type; /* type of controller */ 132 int sc_iobase; /* base i/o port */ 133 int chan; /* dma channel number, 1..3 */ 134 int flags; /* state of tape drive */ 135 unsigned dens; /* tape density */ 136 int bsize; /* tape block size */ 137 void *buf; /* internal i/o buffer */ 138 139 void *dmavaddr; /* virtual address of dma i/o buffer */ 140 size_t dmatotal; /* size of i/o buffer */ 141 int dmaflags; /* i/o direction */ 142 size_t dmacount; /* resulting length of dma i/o */ 143 144 u_short error; /* code for error encountered */ 145 u_short ercnt; /* number of error blocks */ 146 u_short urcnt; /* number of underruns */ 147 148 int DATAPORT, CMDPORT, STATPORT, CTLPORT, SDMAPORT, RDMAPORT; 149 u_char BUSY, NOEXCEP, RESETMASK, RESETVAL, ONLINE, RESET, REQUEST, IEN; 150 }; 151 152 int wtwait __P((struct wt_softc *sc, int catch, char *msg)); 153 int wtcmd __P((struct wt_softc *sc, int cmd)); 154 int wtstart __P((struct wt_softc *sc, int flag, void *vaddr, size_t len)); 155 void wtdma __P((struct wt_softc *sc)); 156 void wttimer __P((void *arg)); 157 void wtclock __P((struct wt_softc *sc)); 158 int wtreset __P((struct wt_softc *sc)); 159 int wtsense __P((struct wt_softc *sc, int verbose, int ignore)); 160 int wtstatus __P((struct wt_softc *sc)); 161 void wtrewind __P((struct wt_softc *sc)); 162 int wtreadfm __P((struct wt_softc *sc)); 163 int wtwritefm __P((struct wt_softc *sc)); 164 u_char wtpoll __P((struct wt_softc *sc, int mask, int bits)); 165 166 int wtprobe __P((struct device *, void *, void *)); 167 void wtattach __P((struct device *, struct device *, void *)); 168 int wtintr __P((void *sc)); 169 170 struct cfattach wt_ca = { 171 sizeof(struct wt_softc), wtprobe, wtattach 172 }; 173 174 struct cfdriver wt_cd = { 175 NULL, "wt", DV_TAPE 176 }; 177 178 /* 179 * Probe for the presence of the device. 180 */ 181 int 182 wtprobe(parent, match, aux) 183 struct device *parent; 184 void *match, *aux; 185 { 186 struct wt_softc *sc = match; 187 struct isa_attach_args *ia = aux; 188 int iobase; 189 190 sc->chan = ia->ia_drq; 191 sc->sc_iobase = iobase = ia->ia_iobase; 192 if (sc->chan < 1 || sc->chan > 3) { 193 printf("%s: Bad drq=%d, should be 1..3\n", sc->sc_dev.dv_xname, 194 sc->chan); 195 return 0; 196 } 197 198 /* Try Wangtek. */ 199 sc->type = WANGTEK; 200 sc->CTLPORT = WT_CTLPORT(iobase); 201 sc->STATPORT = WT_STATPORT(iobase); 202 sc->CMDPORT = WT_CMDPORT(iobase); 203 sc->DATAPORT = WT_DATAPORT(iobase); 204 sc->SDMAPORT = sc->RDMAPORT = 0; 205 sc->BUSY = WT_BUSY; sc->NOEXCEP = WT_NOEXCEP; 206 sc->RESETMASK = WT_RESETMASK; sc->RESETVAL = WT_RESETVAL; 207 sc->ONLINE = WT_ONLINE; sc->RESET = WT_RESET; 208 sc->REQUEST = WT_REQUEST; sc->IEN = WT_IEN; 209 if (wtreset(sc)) { 210 ia->ia_iosize = WT_NPORT; 211 return 1; 212 } 213 214 /* Try Archive. */ 215 sc->type = ARCHIVE; 216 sc->CTLPORT = AV_CTLPORT(iobase); 217 sc->STATPORT = AV_STATPORT(iobase); 218 sc->CMDPORT = AV_CMDPORT(iobase); 219 sc->DATAPORT = AV_DATAPORT(iobase); 220 sc->SDMAPORT = AV_SDMAPORT(iobase); 221 sc->RDMAPORT = AV_RDMAPORT(iobase); 222 sc->BUSY = AV_BUSY; sc->NOEXCEP = AV_NOEXCEP; 223 sc->RESETMASK = AV_RESETMASK; sc->RESETVAL = AV_RESETVAL; 224 sc->ONLINE = 0; sc->RESET = AV_RESET; 225 sc->REQUEST = AV_REQUEST; sc->IEN = AV_IEN; 226 if (wtreset(sc)) { 227 ia->ia_iosize = AV_NPORT; 228 return 1; 229 } 230 231 /* Tape controller not found. */ 232 sc->type = UNKNOWN; 233 return 0; 234 } 235 236 /* 237 * Device is found, configure it. 238 */ 239 void 240 wtattach(parent, self, aux) 241 struct device *parent, *self; 242 void *aux; 243 { 244 struct wt_softc *sc = (void *)self; 245 struct isa_attach_args *ia = aux; 246 247 if (sc->type == ARCHIVE) { 248 printf(": type <Archive>\n"); 249 /* Reset DMA. */ 250 outb(sc->RDMAPORT, 0); 251 } else 252 printf(": type <Wangtek>\n"); 253 sc->flags = TPSTART; /* tape is rewound */ 254 sc->dens = -1; /* unknown density */ 255 256 sc->sc_ih = isa_intr_establish(ia->ia_irq, IST_EDGE, IPL_BIO, wtintr, 257 sc); 258 } 259 260 int 261 wtdump(dev, blkno, va, size) 262 dev_t dev; 263 daddr_t blkno; 264 caddr_t va; 265 size_t size; 266 { 267 268 /* Not implemented. */ 269 return ENXIO; 270 } 271 272 int 273 wtsize(dev) 274 dev_t dev; 275 { 276 277 /* Not implemented. */ 278 return -1; 279 } 280 281 /* 282 * Open routine, called on every device open. 283 */ 284 int 285 wtopen(dev, flag) 286 dev_t dev; 287 int flag; 288 { 289 int unit = minor(dev) & T_UNIT; 290 struct wt_softc *sc; 291 int error; 292 293 if (unit >= wt_cd.cd_ndevs) 294 return ENXIO; 295 sc = wt_cd.cd_devs[unit]; 296 if (!sc) 297 return ENXIO; 298 299 /* Check that device is not in use */ 300 if (sc->flags & TPINUSE) 301 return EBUSY; 302 303 /* If the tape is in rewound state, check the status and set density. */ 304 if (sc->flags & TPSTART) { 305 /* If rewind is going on, wait */ 306 if (error = wtwait(sc, PCATCH, "wtrew")) 307 return error; 308 309 /* Check the controller status */ 310 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 311 /* Bad status, reset the controller. */ 312 if (!wtreset(sc)) 313 return EIO; 314 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 315 return EIO; 316 } 317 318 /* Set up tape density. */ 319 if (sc->dens != (minor(dev) & WT_DENSEL)) { 320 int d = 0; 321 322 switch (minor(dev) & WT_DENSEL) { 323 case WT_DENSDFLT: 324 default: 325 break; /* default density */ 326 case WT_QIC11: 327 d = QIC_FMT11; break; /* minor 010 */ 328 case WT_QIC24: 329 d = QIC_FMT24; break; /* minor 020 */ 330 case WT_QIC120: 331 d = QIC_FMT120; break; /* minor 030 */ 332 case WT_QIC150: 333 d = QIC_FMT150; break; /* minor 040 */ 334 case WT_QIC300: 335 d = QIC_FMT300; break; /* minor 050 */ 336 case WT_QIC600: 337 d = QIC_FMT600; break; /* minor 060 */ 338 } 339 if (d) { 340 /* Change tape density. */ 341 if (!wtcmd(sc, d)) 342 return EIO; 343 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 344 return EIO; 345 346 /* Check the status of the controller. */ 347 if (sc->error & TP_ILL) { 348 printf("%s: invalid tape density\n", 349 sc->sc_dev.dv_xname); 350 return ENODEV; 351 } 352 } 353 sc->dens = minor(dev) & WT_DENSEL; 354 } 355 sc->flags &= ~TPSTART; 356 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 357 return ENXIO; 358 359 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 360 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 361 362 sc->flags = TPINUSE; 363 if (flag & FREAD) 364 sc->flags |= TPREAD; 365 if (flag & FWRITE) 366 sc->flags |= TPWRITE; 367 return 0; 368 } 369 370 /* 371 * Close routine, called on last device close. 372 */ 373 int 374 wtclose(dev) 375 dev_t dev; 376 { 377 int unit = minor(dev) & T_UNIT; 378 struct wt_softc *sc = wt_cd.cd_devs[unit]; 379 380 /* If rewind is pending, do nothing */ 381 if (sc->flags & TPREW) 382 goto done; 383 384 /* If seek forward is pending and no rewind on close, do nothing */ 385 if (sc->flags & TPRMARK) { 386 if (minor(dev) & T_NOREWIND) 387 goto done; 388 389 /* If read file mark is going on, wait */ 390 wtwait(sc, 0, "wtrfm"); 391 } 392 393 if (sc->flags & TPWANY) { 394 /* Tape was written. Write file mark. */ 395 wtwritefm(sc); 396 } 397 398 if ((minor(dev) & T_NOREWIND) == 0) { 399 /* Rewind to beginning of tape. */ 400 /* Don't wait until rewind, though. */ 401 wtrewind(sc); 402 goto done; 403 } 404 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 405 /* Space forward to after next file mark if no writing done. */ 406 /* Don't wait for completion. */ 407 wtreadfm(sc); 408 } 409 410 done: 411 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 412 free(sc->buf, M_TEMP); 413 return 0; 414 } 415 416 /* 417 * Ioctl routine. Compatible with BSD ioctls. 418 * Direct QIC-02 commands ERASE and RETENSION added. 419 * There are three possible ioctls: 420 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 421 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 422 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 423 */ 424 int 425 wtioctl(dev, cmd, addr, flag) 426 dev_t dev; 427 u_long cmd; 428 void *addr; 429 int flag; 430 { 431 int unit = minor(dev) & T_UNIT; 432 struct wt_softc *sc = wt_cd.cd_devs[unit]; 433 int error, count, op; 434 435 switch (cmd) { 436 default: 437 return EINVAL; 438 case WTQICMD: /* direct QIC command */ 439 op = *(int *)addr; 440 switch (op) { 441 default: 442 return EINVAL; 443 case QIC_ERASE: /* erase the whole tape */ 444 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 445 return EACCES; 446 if (error = wtwait(sc, PCATCH, "wterase")) 447 return error; 448 break; 449 case QIC_RETENS: /* retension the tape */ 450 if (error = wtwait(sc, PCATCH, "wtretens")) 451 return error; 452 break; 453 } 454 /* Both ERASE and RETENS operations work like REWIND. */ 455 /* Simulate the rewind operation here. */ 456 sc->flags &= ~(TPRO | TPWO | TPVOL); 457 if (!wtcmd(sc, op)) 458 return EIO; 459 sc->flags |= TPSTART | TPREW; 460 if (op == QIC_ERASE) 461 sc->flags |= TPWANY; 462 wtclock(sc); 463 return 0; 464 case MTIOCIEOT: /* ignore EOT errors */ 465 case MTIOCEEOT: /* enable EOT errors */ 466 return 0; 467 case MTIOCGET: 468 ((struct mtget*)addr)->mt_type = 469 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 470 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 471 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 472 ((struct mtget*)addr)->mt_resid = 0; 473 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 474 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 475 return 0; 476 case MTIOCTOP: 477 break; 478 } 479 480 switch ((short)((struct mtop*)addr)->mt_op) { 481 default: 482 #if 0 483 case MTFSR: /* forward space record */ 484 case MTBSR: /* backward space record */ 485 case MTBSF: /* backward space file */ 486 #endif 487 return EINVAL; 488 case MTNOP: /* no operation, sets status only */ 489 case MTCACHE: /* enable controller cache */ 490 case MTNOCACHE: /* disable controller cache */ 491 return 0; 492 case MTREW: /* rewind */ 493 case MTOFFL: /* rewind and put the drive offline */ 494 if (sc->flags & TPREW) /* rewind is running */ 495 return 0; 496 if (error = wtwait(sc, PCATCH, "wtorew")) 497 return error; 498 wtrewind(sc); 499 return 0; 500 case MTFSF: /* forward space file */ 501 for (count = ((struct mtop*)addr)->mt_count; count > 0; 502 --count) { 503 if (error = wtwait(sc, PCATCH, "wtorfm")) 504 return error; 505 if (error = wtreadfm(sc)) 506 return error; 507 } 508 return 0; 509 case MTWEOF: /* write an end-of-file record */ 510 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 511 return EACCES; 512 if (error = wtwait(sc, PCATCH, "wtowfm")) 513 return error; 514 if (error = wtwritefm(sc)) 515 return error; 516 return 0; 517 } 518 519 #ifdef DIAGNOSTIC 520 panic("wtioctl: impossible"); 521 #endif 522 } 523 524 /* 525 * Strategy routine. 526 */ 527 void 528 wtstrategy(bp) 529 struct buf *bp; 530 { 531 int unit = minor(bp->b_dev) & T_UNIT; 532 struct wt_softc *sc = wt_cd.cd_devs[unit]; 533 int s; 534 535 bp->b_resid = bp->b_bcount; 536 537 /* at file marks and end of tape, we just return '0 bytes available' */ 538 if (sc->flags & TPVOL) 539 goto xit; 540 541 if (bp->b_flags & B_READ) { 542 /* Check read access and no previous write to this tape. */ 543 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 544 goto errxit; 545 546 /* For now, we assume that all data will be copied out */ 547 /* If read command outstanding, just skip down */ 548 if ((sc->flags & TPRO) == 0) { 549 if (!wtsense(sc, 1, TP_WRP)) { 550 /* Clear status. */ 551 goto errxit; 552 } 553 if (!wtcmd(sc, QIC_RDDATA)) { 554 /* Set read mode. */ 555 wtsense(sc, 1, TP_WRP); 556 goto errxit; 557 } 558 sc->flags |= TPRO | TPRANY; 559 } 560 } else { 561 /* Check write access and write protection. */ 562 /* No previous read from this tape allowed. */ 563 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 564 goto errxit; 565 566 /* If write command outstanding, just skip down */ 567 if ((sc->flags & TPWO) == 0) { 568 if (!wtsense(sc, 1, 0)) { 569 /* Clear status. */ 570 goto errxit; 571 } 572 if (!wtcmd(sc, QIC_WRTDATA)) { 573 /* Set write mode. */ 574 wtsense(sc, 1, 0); 575 goto errxit; 576 } 577 sc->flags |= TPWO | TPWANY; 578 } 579 } 580 581 if (bp->b_bcount == 0) 582 goto xit; 583 584 sc->flags &= ~TPEXCEP; 585 s = splbio(); 586 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 587 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 588 bp->b_resid -= sc->dmacount; 589 } 590 splx(s); 591 592 if (sc->flags & TPEXCEP) { 593 errxit: 594 bp->b_flags |= B_ERROR; 595 bp->b_error = EIO; 596 } 597 xit: 598 biodone(bp); 599 return; 600 } 601 602 int 603 wtread(dev, uio) 604 dev_t dev; 605 struct uio *uio; 606 { 607 608 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 609 } 610 611 int 612 wtwrite(dev, uio) 613 dev_t dev; 614 struct uio *uio; 615 { 616 617 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 618 } 619 620 /* 621 * Interrupt routine. 622 */ 623 int 624 wtintr(arg) 625 void *arg; 626 { 627 struct wt_softc *sc = arg; 628 u_char x; 629 630 x = inb(sc->STATPORT); /* get status */ 631 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 632 if ((x & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP)) { 633 WTDBPRINT(("busy\n")); 634 return 0; /* device is busy */ 635 } 636 637 /* 638 * Check if rewind finished. 639 */ 640 if (sc->flags & TPREW) { 641 WTDBPRINT(((x & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP) ? 642 "rewind busy?\n" : "rewind finished\n")); 643 sc->flags &= ~TPREW; /* rewind finished */ 644 wtsense(sc, 1, TP_WRP); 645 wakeup((caddr_t)sc); 646 return 1; 647 } 648 649 /* 650 * Check if writing/reading of file mark finished. 651 */ 652 if (sc->flags & (TPRMARK | TPWMARK)) { 653 WTDBPRINT(((x & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP) ? 654 "marker r/w busy?\n" : "marker r/w finished\n")); 655 if ((x & sc->NOEXCEP) == 0) /* operation failed */ 656 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 657 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 658 wakeup((caddr_t)sc); 659 return 1; 660 } 661 662 /* 663 * Do we started any i/o? If no, just return. 664 */ 665 if ((sc->flags & TPACTIVE) == 0) { 666 WTDBPRINT(("unexpected interrupt\n")); 667 return 0; 668 } 669 sc->flags &= ~TPACTIVE; 670 sc->dmacount += sc->bsize; /* increment counter */ 671 672 /* 673 * Clean up dma. 674 */ 675 if ((sc->dmaflags & DMAMODE_READ) && 676 (sc->dmatotal - sc->dmacount) < sc->bsize) { 677 /* If reading short block, copy the internal buffer 678 * to the user memory. */ 679 isa_dmadone(sc->dmaflags, sc->buf, sc->bsize, sc->chan); 680 bcopy(sc->buf, sc->dmavaddr, sc->dmatotal - sc->dmacount); 681 } else 682 isa_dmadone(sc->dmaflags, sc->dmavaddr, sc->bsize, sc->chan); 683 684 /* 685 * On exception, check for end of file and end of volume. 686 */ 687 if ((x & sc->NOEXCEP) == 0) { 688 WTDBPRINT(("i/o exception\n")); 689 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 690 if (sc->error & (TP_EOM | TP_FIL)) 691 sc->flags |= TPVOL; /* end of file */ 692 else 693 sc->flags |= TPEXCEP; /* i/o error */ 694 wakeup((caddr_t)sc); 695 return 1; 696 } 697 698 if (sc->dmacount < sc->dmatotal) { 699 /* Continue I/O. */ 700 sc->dmavaddr += sc->bsize; 701 wtdma(sc); 702 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 703 return 1; 704 } 705 if (sc->dmacount > sc->dmatotal) /* short last block */ 706 sc->dmacount = sc->dmatotal; 707 /* Wake up user level. */ 708 wakeup((caddr_t)sc); 709 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 710 return 1; 711 } 712 713 /* start the rewind operation */ 714 void 715 wtrewind(sc) 716 struct wt_softc *sc; 717 { 718 int rwmode = sc->flags & (TPRO | TPWO); 719 720 sc->flags &= ~(TPRO | TPWO | TPVOL); 721 /* 722 * Wangtek strictly follows QIC-02 standard: 723 * clearing ONLINE in read/write modes causes rewind. 724 * REWIND command is not allowed in read/write mode 725 * and gives `illegal command' error. 726 */ 727 if (sc->type == WANGTEK && rwmode) { 728 outb(sc->CTLPORT, 0); 729 } else if (!wtcmd(sc, QIC_REWIND)) 730 return; 731 sc->flags |= TPSTART | TPREW; 732 wtclock(sc); 733 } 734 735 /* 736 * Start the `read marker' operation. 737 */ 738 int 739 wtreadfm(sc) 740 struct wt_softc *sc; 741 { 742 743 sc->flags &= ~(TPRO | TPWO | TPVOL); 744 if (!wtcmd(sc, QIC_READFM)) { 745 wtsense(sc, 1, TP_WRP); 746 return EIO; 747 } 748 sc->flags |= TPRMARK | TPRANY; 749 wtclock(sc); 750 /* Don't wait for completion here. */ 751 return 0; 752 } 753 754 /* 755 * Write marker to the tape. 756 */ 757 int 758 wtwritefm(sc) 759 struct wt_softc *sc; 760 { 761 762 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 763 sc->flags &= ~(TPRO | TPWO); 764 if (!wtcmd(sc, QIC_WRITEFM)) { 765 wtsense(sc, 1, 0); 766 return EIO; 767 } 768 sc->flags |= TPWMARK | TPWANY; 769 wtclock(sc); 770 return wtwait(sc, 0, "wtwfm"); 771 } 772 773 /* 774 * While controller status & mask == bits continue waiting. 775 */ 776 u_char 777 wtpoll(sc, mask, bits) 778 struct wt_softc *sc; 779 int mask, bits; 780 { 781 u_char x; 782 int i; 783 784 /* Poll status port, waiting for specified bits. */ 785 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 786 x = inb(sc->STATPORT); 787 if ((x & mask) != bits) 788 return x; 789 delay(1); 790 } 791 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 792 x = inb(sc->STATPORT); 793 if ((x & mask) != bits) 794 return x; 795 delay(100); 796 } 797 for (;;) { /* forever */ 798 x = inb(sc->STATPORT); 799 if ((x & mask) != bits) 800 return x; 801 tsleep((caddr_t)wtpoll, WTPRI, "wtpoll", 1); 802 } 803 } 804 805 /* 806 * Execute QIC command. 807 */ 808 int 809 wtcmd(sc, cmd) 810 struct wt_softc *sc; 811 int cmd; 812 { 813 u_char x; 814 int s; 815 816 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 817 s = splbio(); 818 x = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 819 if ((x & sc->NOEXCEP) == 0) { /* error */ 820 splx(s); 821 return 0; 822 } 823 824 outb(sc->CMDPORT, cmd); /* output the command */ 825 826 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 827 wtpoll(sc, sc->BUSY, sc->BUSY); /* wait for ready */ 828 outb(sc->CTLPORT, sc->IEN | sc->ONLINE); /* reset request */ 829 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 830 splx(s); 831 return 1; 832 } 833 834 /* wait for the end of i/o, seeking marker or rewind operation */ 835 int 836 wtwait(sc, catch, msg) 837 struct wt_softc *sc; 838 int catch; 839 char *msg; 840 { 841 int error; 842 843 WTDBPRINT(("wtwait() `%s'\n", msg)); 844 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 845 if (error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) 846 return error; 847 return 0; 848 } 849 850 /* initialize dma for the i/o operation */ 851 void 852 wtdma(sc) 853 struct wt_softc *sc; 854 { 855 856 sc->flags |= TPACTIVE; 857 wtclock(sc); 858 859 if (sc->type == ARCHIVE) { 860 /* Set DMA. */ 861 outb(sc->SDMAPORT, 0); 862 } 863 864 if ((sc->dmaflags & DMAMODE_READ) && 865 (sc->dmatotal - sc->dmacount) < sc->bsize) { 866 /* Reading short block; do it through the internal buffer. */ 867 isa_dmastart(sc->dmaflags, sc->buf, sc->bsize, sc->chan); 868 } else 869 isa_dmastart(sc->dmaflags, sc->dmavaddr, sc->bsize, sc->chan); 870 } 871 872 /* start i/o operation */ 873 int 874 wtstart(sc, flag, vaddr, len) 875 struct wt_softc *sc; 876 int flag; 877 void *vaddr; 878 size_t len; 879 { 880 u_char x; 881 882 WTDBPRINT(("wtstart()\n")); 883 x = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 884 if ((x & sc->NOEXCEP) == 0) { 885 sc->flags |= TPEXCEP; /* error */ 886 return 0; 887 } 888 sc->flags &= ~TPEXCEP; /* clear exception flag */ 889 sc->dmavaddr = vaddr; 890 sc->dmatotal = len; 891 sc->dmacount = 0; 892 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 893 wtdma(sc); 894 return 1; 895 } 896 897 /* 898 * Start timer. 899 */ 900 void 901 wtclock(sc) 902 struct wt_softc *sc; 903 { 904 905 if (sc->flags & TPTIMER) 906 return; 907 sc->flags |= TPTIMER; 908 /* 909 * Some controllers seem to lose dma interrupts too often. To make the 910 * tape stream we need 1 tick timeout. 911 */ 912 timeout(wttimer, sc, (sc->flags & TPACTIVE) ? 1 : hz); 913 } 914 915 /* 916 * Simulate an interrupt periodically while i/o is going. 917 * This is necessary in case interrupts get eaten due to 918 * multiple devices on a single IRQ line. 919 */ 920 void 921 wttimer(arg) 922 void *arg; 923 { 924 struct wt_softc *sc = (struct wt_softc *)arg; 925 int s; 926 927 sc->flags &= ~TPTIMER; 928 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 929 return; 930 931 /* If i/o going, simulate interrupt. */ 932 s = splbio(); 933 if ((inb(sc->STATPORT) & (sc->BUSY | sc->NOEXCEP)) != (sc->BUSY | sc->NOEXCEP)) { 934 WTDBPRINT(("wttimer() -- ")); 935 wtintr(sc); 936 } 937 splx(s); 938 939 /* Restart timer if i/o pending. */ 940 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 941 wtclock(sc); 942 } 943 944 /* 945 * Perform QIC-02 and QIC-36 compatible reset sequence. 946 */ 947 int 948 wtreset(sc) 949 struct wt_softc *sc; 950 { 951 u_char x; 952 int i; 953 954 outb(sc->CTLPORT, sc->RESET | sc->ONLINE); /* send reset */ 955 delay(30); 956 outb(sc->CTLPORT, sc->ONLINE); /* turn off reset */ 957 delay(30); 958 959 /* Read the controller status. */ 960 x = inb(sc->STATPORT); 961 if (x == 0xff) /* no port at this address? */ 962 return 0; 963 964 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 965 for (i = 0; i < 3000; ++i) { 966 if ((x & sc->BUSY) == 0 || (x & sc->NOEXCEP) == 0) 967 break; 968 delay(1000); 969 x = inb(sc->STATPORT); 970 } 971 return (x & sc->RESETMASK) == sc->RESETVAL; 972 } 973 974 /* 975 * Get controller status information. Return 0 if user i/o request should 976 * receive an i/o error code. 977 */ 978 int 979 wtsense(sc, verbose, ignore) 980 struct wt_softc *sc; 981 int verbose, ignore; 982 { 983 char *msg = 0; 984 int error; 985 986 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 987 sc->flags &= ~(TPRO | TPWO); 988 if (!wtstatus(sc)) 989 return 0; 990 if ((sc->error & TP_ST0) == 0) 991 sc->error &= ~TP_ST0MASK; 992 if ((sc->error & TP_ST1) == 0) 993 sc->error &= ~TP_ST1MASK; 994 sc->error &= ~ignore; /* ignore certain errors */ 995 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 996 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 997 if (!error) 998 return 1; 999 if (!verbose) 1000 return 0; 1001 1002 /* lifted from tdriver.c from Wangtek */ 1003 if (error & TP_USL) 1004 msg = "Drive not online"; 1005 else if (error & TP_CNI) 1006 msg = "No cartridge"; 1007 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1008 msg = "Tape is write protected"; 1009 sc->flags |= TPWP; 1010 } else if (error & TP_FIL) 1011 msg = 0 /*"Filemark detected"*/; 1012 else if (error & TP_EOM) 1013 msg = 0 /*"End of tape"*/; 1014 else if (error & TP_BNL) 1015 msg = "Block not located"; 1016 else if (error & TP_UDA) 1017 msg = "Unrecoverable data error"; 1018 else if (error & TP_NDT) 1019 msg = "No data detected"; 1020 else if (error & TP_ILL) 1021 msg = "Illegal command"; 1022 if (msg) 1023 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 1024 return 0; 1025 } 1026 1027 /* 1028 * Get controller status information. 1029 */ 1030 int 1031 wtstatus(sc) 1032 struct wt_softc *sc; 1033 { 1034 char *p; 1035 int s; 1036 1037 s = splbio(); 1038 wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 1039 outb(sc->CMDPORT, QIC_RDSTAT); /* send `read status' command */ 1040 1041 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 1042 wtpoll(sc, sc->BUSY, sc->BUSY); /* wait for ready */ 1043 outb(sc->CTLPORT, sc->ONLINE); /* reset request */ 1044 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 1045 1046 p = (char *)&sc->error; 1047 while (p < (char *)&sc->error + 6) { 1048 u_char x = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); 1049 if ((x & sc->NOEXCEP) == 0) { /* error */ 1050 splx(s); 1051 return 0; 1052 } 1053 1054 *p++ = inb(sc->DATAPORT); /* read status byte */ 1055 1056 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 1057 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 1058 outb(sc->CTLPORT, sc->ONLINE); /* unset request */ 1059 } 1060 splx(s); 1061 return 1; 1062 } 1063
Indexes created Wed Sep 24 22:09:59 GMT 2025