wt.c revision 1.12
1 /* 2 * Streamer tape driver. 3 * Supports Archive and Wangtek compatible QIC-02/QIC-36 boards. 4 * 5 * Copyright (C) 1993 by: 6 * Sergey Ryzhkov <sir (at) kiae.su> 7 * Serge Vakulenko <vak (at) zebub.msk.su> 8 * 9 * This software is distributed with NO WARRANTIES, not even the implied 10 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 11 * 12 * Authors grant any other persons or organisations permission to use 13 * or modify this software as long as this message is kept with the software, 14 * all derivative works or modified versions. 15 * 16 * This driver is derived from the old 386bsd Wangtek streamer tape driver, 17 * made by Robert Baron at CMU, based on Intel sources. 18 * 19 * $Id: wt.c,v 1.12 1994/04/21 00:41:52 mycroft Exp $ 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 <i386/isa/isavar.h> 68 #include <i386/isa/wtreg.h> 69 70 /* 71 * Uncomment this to enable internal device tracing. 72 */ 73 #define DEBUG(s) /* printf s */ 74 75 #define WTPRI (PZERO+10) /* sleep priority */ 76 77 /* 78 * Wangtek controller ports 79 */ 80 #define WT_CTLPORT(base) ((base)+0) /* control, write only */ 81 #define WT_STATPORT(base) ((base)+0) /* status, read only */ 82 #define WT_CMDPORT(base) ((base)+1) /* command, write only */ 83 #define WT_DATAPORT(base) ((base)+1) /* data, read only */ 84 #define WT_NPORT 2 /* 2 i/o ports */ 85 86 /* status port bits */ 87 #define WT_BUSY 0x01 /* not ready bit define */ 88 #define WT_NOEXCEP 0x02 /* no exception bit define */ 89 #define WT_RESETMASK 0x07 /* to check after reset */ 90 #define WT_RESETVAL 0x05 /* state after reset */ 91 92 /* control port bits */ 93 #define WT_ONLINE 0x01 /* device selected */ 94 #define WT_RESET 0x02 /* reset command */ 95 #define WT_REQUEST 0x04 /* request command */ 96 #define WT_IEN 0x08 /* enable dma */ 97 98 /* 99 * Archive controller ports 100 */ 101 #define AV_DATAPORT(base) ((base)+0) /* data, read only */ 102 #define AV_CMDPORT(base) ((base)+0) /* command, write only */ 103 #define AV_STATPORT(base) ((base)+1) /* status, read only */ 104 #define AV_CTLPORT(base) ((base)+1) /* control, write only */ 105 #define AV_SDMAPORT(base) ((base)+2) /* start dma */ 106 #define AV_RDMAPORT(base) ((base)+3) /* reset dma */ 107 #define AV_NPORT 4 /* 4 i/o ports */ 108 109 /* status port bits */ 110 #define AV_BUSY 0x40 /* not ready bit define */ 111 #define AV_NOEXCEP 0x20 /* no exception bit define */ 112 #define AV_RESETMASK 0xf8 /* to check after reset */ 113 #define AV_RESETVAL 0x50 /* state after reset */ 114 115 /* control port bits */ 116 #define AV_RESET 0x80 /* reset command */ 117 #define AV_REQUEST 0x40 /* request command */ 118 #define AV_IEN 0x20 /* enable interrupts */ 119 120 enum wttype { 121 UNKNOWN = 0, /* unknown type, driver disabled */ 122 ARCHIVE, /* Archive Viper SC499, SC402 etc */ 123 WANGTEK, /* Wangtek */ 124 }; 125 126 struct wt_softc { 127 struct device sc_dev; 128 struct intrhand sc_ih; 129 130 enum wttype type; /* type of controller */ 131 u_short sc_iobase; /* base i/o port */ 132 unsigned 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, B_READ or B_WRITE */ 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 u_short DATAPORT, CMDPORT, STATPORT, CTLPORT, SDMAPORT, RDMAPORT; 148 u_char BUSY, NOEXCEP, RESETMASK, RESETVAL, ONLINE, RESET, REQUEST, IEN; 149 }; 150 151 int wtwait __P((struct wt_softc *sc, int catch, char *msg)); 152 int wtcmd __P((struct wt_softc *sc, int cmd)); 153 int wtstart __P((struct wt_softc *sc, int flag, void *vaddr, size_t len)); 154 void wtdma __P((struct wt_softc *sc)); 155 void wttimer __P((struct wt_softc *sc)); 156 void wtclock __P((struct wt_softc *sc)); 157 int wtreset __P((struct wt_softc *sc)); 158 int wtsense __P((struct wt_softc *sc, int verbose, int ignore)); 159 int wtstatus __P((struct wt_softc *sc)); 160 void wtrewind __P((struct wt_softc *sc)); 161 int wtreadfm __P((struct wt_softc *sc)); 162 int wtwritefm __P((struct wt_softc *sc)); 163 u_char wtpoll __P((struct wt_softc *sc, int mask, int bits)); 164 165 int wtprobe(); 166 void wtattach(); 167 int wtintr __P((struct wt_softc *sc)); 168 169 struct cfdriver wtcd = { 170 NULL, "wt", wtprobe, wtattach, DV_TAPE, sizeof(struct wt_softc) 171 }; 172 173 /* 174 * Probe for the presence of the device. 175 */ 176 int 177 wtprobe(parent, self, aux) 178 struct device *parent, *self; 179 void *aux; 180 { 181 struct wt_softc *sc = (void *)self; 182 struct isa_attach_args *ia = aux; 183 u_short iobase; 184 185 sc->chan = ia->ia_drq; 186 sc->sc_iobase = iobase = ia->ia_iobase; 187 if (sc->chan < 1 || sc->chan > 3) { 188 printf("%s: Bad drq=%d, should be 1..3\n", sc->sc_dev.dv_xname, 189 sc->chan); 190 return 0; 191 } 192 193 /* Try Wangtek. */ 194 sc->type = WANGTEK; 195 sc->CTLPORT = WT_CTLPORT(iobase); 196 sc->STATPORT = WT_STATPORT(iobase); 197 sc->CMDPORT = WT_CMDPORT(iobase); 198 sc->DATAPORT = WT_DATAPORT(iobase); 199 sc->SDMAPORT = sc->RDMAPORT = 0; 200 sc->BUSY = WT_BUSY; sc->NOEXCEP = WT_NOEXCEP; 201 sc->RESETMASK = WT_RESETMASK; sc->RESETVAL = WT_RESETVAL; 202 sc->ONLINE = WT_ONLINE; sc->RESET = WT_RESET; 203 sc->REQUEST = WT_REQUEST; sc->IEN = WT_IEN; 204 if (wtreset(sc)) { 205 ia->ia_iosize = WT_NPORT; 206 return 1; 207 } 208 209 /* Try Archive. */ 210 sc->type = ARCHIVE; 211 sc->CTLPORT = AV_CTLPORT(iobase); 212 sc->STATPORT = AV_STATPORT(iobase); 213 sc->CMDPORT = AV_CMDPORT(iobase); 214 sc->DATAPORT = AV_DATAPORT(iobase); 215 sc->SDMAPORT = AV_SDMAPORT(iobase); 216 sc->RDMAPORT = AV_RDMAPORT(iobase); 217 sc->BUSY = AV_BUSY; sc->NOEXCEP = AV_NOEXCEP; 218 sc->RESETMASK = AV_RESETMASK; sc->RESETVAL = AV_RESETVAL; 219 sc->ONLINE = 0; sc->RESET = AV_RESET; 220 sc->REQUEST = AV_REQUEST; sc->IEN = AV_IEN; 221 if (wtreset(sc)) { 222 ia->ia_iosize = AV_NPORT; 223 return 1; 224 } 225 226 /* Tape controller not found. */ 227 sc->type = UNKNOWN; 228 return 0; 229 } 230 231 /* 232 * Device is found, configure it. 233 */ 234 void 235 wtattach(parent, self, aux) 236 struct device *parent, *self; 237 void *aux; 238 { 239 struct wt_softc *sc = (void *)self; 240 struct isa_attach_args *ia = aux; 241 242 if (sc->type == ARCHIVE) { 243 printf(": type <Archive>\n"); 244 /* Reset DMA. */ 245 outb(sc->RDMAPORT, 0); 246 } else 247 printf(": type <Wangtek>\n"); 248 sc->flags = TPSTART; /* tape is rewound */ 249 sc->dens = -1; /* unknown density */ 250 251 sc->sc_ih.ih_fun = wtintr; 252 sc->sc_ih.ih_arg = sc; 253 sc->sc_ih.ih_level = IPL_BIO; 254 intr_establish(ia->ia_irq, &sc->sc_ih); 255 } 256 257 int 258 wtdump(dev) 259 dev_t dev; 260 { 261 262 /* Not implemented. */ 263 return EINVAL; 264 } 265 266 int 267 wtsize(dev) 268 dev_t dev; 269 { 270 271 /* Not implemented. */ 272 return -1; 273 } 274 275 /* 276 * Open routine, called on every device open. 277 */ 278 int 279 wtopen(dev, flag) 280 dev_t dev; 281 int flag; 282 { 283 int unit = minor(dev) & T_UNIT; 284 struct wt_softc *sc; 285 int error; 286 287 if (unit >= wtcd.cd_ndevs) 288 return ENXIO; 289 sc = wtcd.cd_devs[unit]; 290 if (!sc) 291 return ENXIO; 292 293 /* Check that device is not in use */ 294 if (sc->flags & TPINUSE) 295 return EBUSY; 296 297 /* If the tape is in rewound state, check the status and set density. */ 298 if (sc->flags & TPSTART) { 299 /* If rewind is going on, wait */ 300 if (error = wtwait(sc, PCATCH, "wtrew")) 301 return error; 302 303 /* Check the controller status */ 304 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 305 /* Bad status, reset the controller. */ 306 if (!wtreset(sc)) 307 return EIO; 308 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 309 return EIO; 310 } 311 312 /* Set up tape density. */ 313 if (sc->dens != (minor(dev) & WT_DENSEL)) { 314 int d = 0; 315 316 switch (minor(dev) & WT_DENSEL) { 317 case WT_DENSDFLT: 318 default: 319 break; /* default density */ 320 case WT_QIC11: 321 d = QIC_FMT11; break; /* minor 010 */ 322 case WT_QIC24: 323 d = QIC_FMT24; break; /* minor 020 */ 324 case WT_QIC120: 325 d = QIC_FMT120; break; /* minor 030 */ 326 case WT_QIC150: 327 d = QIC_FMT150; break; /* minor 040 */ 328 case WT_QIC300: 329 d = QIC_FMT300; break; /* minor 050 */ 330 case WT_QIC600: 331 d = QIC_FMT600; break; /* minor 060 */ 332 } 333 if (d) { 334 /* Change tape density. */ 335 if (!wtcmd(sc, d)) 336 return EIO; 337 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 338 return EIO; 339 340 /* Check the status of the controller. */ 341 if (sc->error & TP_ILL) { 342 printf("%s: invalid tape density\n", 343 sc->sc_dev.dv_xname); 344 return ENODEV; 345 } 346 } 347 sc->dens = minor(dev) & WT_DENSEL; 348 } 349 sc->flags &= ~TPSTART; 350 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 351 return ENXIO; 352 353 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 354 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 355 356 sc->flags = TPINUSE; 357 if (flag & FREAD) 358 sc->flags |= TPREAD; 359 if (flag & FWRITE) 360 sc->flags |= TPWRITE; 361 return 0; 362 } 363 364 /* 365 * Close routine, called on last device close. 366 */ 367 int 368 wtclose(dev) 369 dev_t dev; 370 { 371 int unit = minor(dev) & T_UNIT; 372 struct wt_softc *sc = wtcd.cd_devs[unit]; 373 374 /* If rewind is pending, do nothing */ 375 if (sc->flags & TPREW) 376 goto done; 377 378 /* If seek forward is pending and no rewind on close, do nothing */ 379 if (sc->flags & TPRMARK) { 380 if (minor(dev) & T_NOREWIND) 381 goto done; 382 383 /* If read file mark is going on, wait */ 384 wtwait(sc, 0, "wtrfm"); 385 } 386 387 if (sc->flags & TPWANY) { 388 /* Tape was written. Write file mark. */ 389 wtwritefm(sc); 390 } 391 392 if ((minor(dev) & T_NOREWIND) == 0) { 393 /* Rewind to beginning of tape. */ 394 /* Don't wait until rewind, though. */ 395 wtrewind(sc); 396 goto done; 397 } 398 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 399 /* Space forward to after next file mark if no writing done. */ 400 /* Don't wait for completion. */ 401 wtreadfm(sc); 402 } 403 404 done: 405 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 406 free(sc->buf, M_TEMP); 407 return 0; 408 } 409 410 /* 411 * Ioctl routine. Compatible with BSD ioctls. 412 * Direct QIC-02 commands ERASE and RETENSION added. 413 * There are three possible ioctls: 414 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 415 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 416 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 417 */ 418 int 419 wtioctl(dev, cmd, addr, flag) 420 dev_t dev; 421 int cmd; 422 void *addr; 423 int flag; 424 { 425 int unit = minor(dev) & T_UNIT; 426 struct wt_softc *sc = wtcd.cd_devs[unit]; 427 int error, count, op; 428 429 switch (cmd) { 430 default: 431 return EINVAL; 432 case WTQICMD: /* direct QIC command */ 433 op = *(int *)addr; 434 switch (op) { 435 default: 436 return EINVAL; 437 case QIC_ERASE: /* erase the whole tape */ 438 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 439 return EACCES; 440 if (error = wtwait(sc, PCATCH, "wterase")) 441 return error; 442 break; 443 case QIC_RETENS: /* retension the tape */ 444 if (error = wtwait(sc, PCATCH, "wtretens")) 445 return error; 446 break; 447 } 448 /* Both ERASE and RETENS operations work like REWIND. */ 449 /* Simulate the rewind operation here. */ 450 sc->flags &= ~(TPRO | TPWO | TPVOL); 451 if (!wtcmd(sc, op)) 452 return EIO; 453 sc->flags |= TPSTART | TPREW; 454 if (op == QIC_ERASE) 455 sc->flags |= TPWANY; 456 wtclock(sc); 457 return 0; 458 case MTIOCIEOT: /* ignore EOT errors */ 459 case MTIOCEEOT: /* enable EOT errors */ 460 return 0; 461 case MTIOCGET: 462 ((struct mtget*)addr)->mt_type = 463 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 464 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 465 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 466 ((struct mtget*)addr)->mt_resid = 0; 467 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 468 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 469 return 0; 470 case MTIOCTOP: 471 break; 472 } 473 474 switch ((short)((struct mtop*)addr)->mt_op) { 475 default: 476 #if 0 477 case MTFSR: /* forward space record */ 478 case MTBSR: /* backward space record */ 479 case MTBSF: /* backward space file */ 480 #endif 481 return EINVAL; 482 case MTNOP: /* no operation, sets status only */ 483 case MTCACHE: /* enable controller cache */ 484 case MTNOCACHE: /* disable controller cache */ 485 return 0; 486 case MTREW: /* rewind */ 487 case MTOFFL: /* rewind and put the drive offline */ 488 if (sc->flags & TPREW) /* rewind is running */ 489 return 0; 490 if (error = wtwait(sc, PCATCH, "wtorew")) 491 return error; 492 wtrewind(sc); 493 return 0; 494 case MTFSF: /* forward space file */ 495 for (count = ((struct mtop*)addr)->mt_count; count > 0; 496 --count) { 497 if (error = wtwait(sc, PCATCH, "wtorfm")) 498 return error; 499 if (error = wtreadfm(sc)) 500 return error; 501 } 502 return 0; 503 case MTWEOF: /* write an end-of-file record */ 504 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 505 return EACCES; 506 if (error = wtwait(sc, PCATCH, "wtowfm")) 507 return error; 508 if (error = wtwritefm(sc)) 509 return error; 510 return 0; 511 } 512 513 #ifdef DIAGNOSTIC 514 panic("wtioctl: impossible"); 515 #endif 516 } 517 518 /* 519 * Strategy routine. 520 */ 521 void 522 wtstrategy(bp) 523 struct buf *bp; 524 { 525 int unit = minor(bp->b_dev) & T_UNIT; 526 struct wt_softc *sc = wtcd.cd_devs[unit]; 527 int s; 528 529 bp->b_resid = bp->b_bcount; 530 531 /* at file marks and end of tape, we just return '0 bytes available' */ 532 if (sc->flags & TPVOL) 533 goto xit; 534 535 if (bp->b_flags & B_READ) { 536 /* Check read access and no previous write to this tape. */ 537 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 538 goto errxit; 539 540 /* For now, we assume that all data will be copied out */ 541 /* If read command outstanding, just skip down */ 542 if ((sc->flags & TPRO) == 0) { 543 if (!wtsense(sc, 1, TP_WRP)) { 544 /* Clear status. */ 545 goto errxit; 546 } 547 if (!wtcmd(sc, QIC_RDDATA)) { 548 /* Set read mode. */ 549 wtsense(sc, 1, TP_WRP); 550 goto errxit; 551 } 552 sc->flags |= TPRO | TPRANY; 553 } 554 } else { 555 /* Check write access and write protection. */ 556 /* No previous read from this tape allowed. */ 557 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 558 goto errxit; 559 560 /* If write command outstanding, just skip down */ 561 if ((sc->flags & TPWO) == 0) { 562 if (!wtsense(sc, 1, 0)) { 563 /* Clear status. */ 564 goto errxit; 565 } 566 if (!wtcmd(sc, QIC_WRTDATA)) { 567 /* Set write mode. */ 568 wtsense(sc, 1, 0); 569 goto errxit; 570 } 571 sc->flags |= TPWO | TPWANY; 572 } 573 } 574 575 if (bp->b_bcount == 0) 576 goto xit; 577 578 sc->flags &= ~TPEXCEP; 579 s = splbio(); 580 if (wtstart(sc, bp->b_flags, bp->b_un.b_addr, bp->b_bcount)) { 581 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 582 bp->b_resid -= sc->dmacount; 583 } 584 splx(s); 585 586 if (sc->flags & TPEXCEP) { 587 errxit: 588 bp->b_flags |= B_ERROR; 589 bp->b_error = EIO; 590 } 591 xit: 592 biodone(bp); 593 return; 594 } 595 596 /* 597 * Interrupt routine. 598 */ 599 int 600 wtintr(sc) 601 struct wt_softc *sc; 602 { 603 u_char s; 604 605 s = inb(sc->STATPORT); /* get status */ 606 DEBUG(("wtintr() status=0x%x -- ", s)); 607 if ((s & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP)) { 608 DEBUG(("busy\n")); 609 return 0; /* device is busy */ 610 } 611 612 /* 613 * Check if rewind finished. 614 */ 615 if (sc->flags & TPREW) { 616 DEBUG(((s & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP) ? 617 "rewind busy?\n" : "rewind finished\n")); 618 sc->flags &= ~TPREW; /* rewind finished */ 619 wtsense(sc, 1, TP_WRP); 620 wakeup((caddr_t)sc); 621 return 1; 622 } 623 624 /* 625 * Check if writing/reading of file mark finished. 626 */ 627 if (sc->flags & (TPRMARK | TPWMARK)) { 628 DEBUG(((s & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP) ? 629 "marker r/w busy?\n" : "marker r/w finished\n")); 630 if ((s & sc->NOEXCEP) == 0) /* operation failed */ 631 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 632 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 633 wakeup((caddr_t)sc); 634 return 1; 635 } 636 637 /* 638 * Do we started any i/o? If no, just return. 639 */ 640 if ((sc->flags & TPACTIVE) == 0) { 641 DEBUG(("unexpected interrupt\n")); 642 return 0; 643 } 644 sc->flags &= ~TPACTIVE; 645 sc->dmacount += sc->bsize; /* increment counter */ 646 647 /* 648 * Clean up dma. 649 */ 650 if ((sc->dmaflags & B_READ) && 651 (sc->dmatotal - sc->dmacount) < sc->bsize) { 652 /* If reading short block, copy the internal buffer 653 * to the user memory. */ 654 isa_dmadone(sc->dmaflags, sc->buf, sc->bsize, sc->chan); 655 bcopy(sc->buf, sc->dmavaddr, sc->dmatotal - sc->dmacount); 656 } else 657 isa_dmadone(sc->dmaflags, sc->dmavaddr, sc->bsize, sc->chan); 658 659 /* 660 * On exception, check for end of file and end of volume. 661 */ 662 if ((s & sc->NOEXCEP) == 0) { 663 DEBUG(("i/o exception\n")); 664 wtsense(sc, 1, (sc->dmaflags & B_READ) ? TP_WRP : 0); 665 if (sc->error & (TP_EOM | TP_FIL)) 666 sc->flags |= TPVOL; /* end of file */ 667 else 668 sc->flags |= TPEXCEP; /* i/o error */ 669 wakeup((caddr_t)sc); 670 return 1; 671 } 672 673 if (sc->dmacount < sc->dmatotal) { 674 /* Continue I/O. */ 675 sc->dmavaddr += sc->bsize; 676 wtdma(sc); 677 DEBUG(("continue i/o, %d\n", sc->dmacount)); 678 return 1; 679 } 680 if (sc->dmacount > sc->dmatotal) /* short last block */ 681 sc->dmacount = sc->dmatotal; 682 /* Wake up user level. */ 683 wakeup((caddr_t)sc); 684 DEBUG(("i/o finished, %d\n", sc->dmacount)); 685 return 1; 686 } 687 688 /* start the rewind operation */ 689 void 690 wtrewind(sc) 691 struct wt_softc *sc; 692 { 693 int rwmode = sc->flags & (TPRO | TPWO); 694 695 sc->flags &= ~(TPRO | TPWO | TPVOL); 696 /* 697 * Wangtek strictly follows QIC-02 standard: 698 * clearing ONLINE in read/write modes causes rewind. 699 * REWIND command is not allowed in read/write mode 700 * and gives `illegal command' error. 701 */ 702 if (sc->type == WANGTEK && rwmode) { 703 outb(sc->CTLPORT, 0); 704 } else if (!wtcmd(sc, QIC_REWIND)) 705 return; 706 sc->flags |= TPSTART | TPREW; 707 wtclock(sc); 708 } 709 710 /* 711 * Start the `read marker' operation. 712 */ 713 int 714 wtreadfm(sc) 715 struct wt_softc *sc; 716 { 717 718 sc->flags &= ~(TPRO | TPWO | TPVOL); 719 if (!wtcmd(sc, QIC_READFM)) { 720 wtsense(sc, 1, TP_WRP); 721 return EIO; 722 } 723 sc->flags |= TPRMARK | TPRANY; 724 wtclock(sc); 725 /* Don't wait for completion here. */ 726 return 0; 727 } 728 729 /* 730 * Write marker to the tape. 731 */ 732 int 733 wtwritefm(sc) 734 struct wt_softc *sc; 735 { 736 737 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 738 sc->flags &= ~(TPRO | TPWO); 739 if (!wtcmd(sc, QIC_WRITEFM)) { 740 wtsense(sc, 1, 0); 741 return EIO; 742 } 743 sc->flags |= TPWMARK | TPWANY; 744 wtclock(sc); 745 return wtwait(sc, 0, "wtwfm"); 746 } 747 748 /* 749 * While controller status & mask == bits continue waiting. 750 */ 751 u_char 752 wtpoll(sc, mask, bits) 753 struct wt_softc *sc; 754 int mask, bits; 755 { 756 u_char s; 757 int i; 758 759 /* Poll status port, waiting for specified bits. */ 760 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 761 s = inb(sc->STATPORT); 762 if ((s & mask) != bits) 763 return s; 764 delay(1); 765 } 766 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 767 s = inb(sc->STATPORT); 768 if ((s & mask) != bits) 769 return s; 770 delay(100); 771 } 772 for (;;) { /* forever */ 773 s = inb(sc->STATPORT); 774 if ((s & mask) != bits) 775 return s; 776 tsleep((caddr_t)wtpoll, WTPRI, "wtpoll", 1); 777 } 778 } 779 780 /* 781 * Execute QIC command. 782 */ 783 int 784 wtcmd(sc, cmd) 785 struct wt_softc *sc; 786 int cmd; 787 { 788 u_char s; 789 790 DEBUG(("wtcmd() cmd=0x%x\n", cmd)); 791 s = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 792 if ((s & sc->NOEXCEP) == 0) /* error */ 793 return 0; 794 795 outb(sc->CMDPORT, cmd); /* output the command */ 796 797 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 798 wtpoll(sc, sc->BUSY, sc->BUSY); /* wait for ready */ 799 outb(sc->CTLPORT, sc->IEN | sc->ONLINE); /* reset request */ 800 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 801 return 1; 802 } 803 804 /* wait for the end of i/o, seeking marker or rewind operation */ 805 int 806 wtwait(sc, catch, msg) 807 struct wt_softc *sc; 808 int catch; 809 char *msg; 810 { 811 int error; 812 813 DEBUG(("wtwait() `%s'\n", msg)); 814 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 815 if (error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) 816 return error; 817 return 0; 818 } 819 820 /* initialize dma for the i/o operation */ 821 void 822 wtdma(sc) 823 struct wt_softc *sc; 824 { 825 826 sc->flags |= TPACTIVE; 827 wtclock(sc); 828 829 if (sc->type == ARCHIVE) { 830 /* Set DMA. */ 831 outb(sc->SDMAPORT, 0); 832 } 833 834 if ((sc->dmaflags & B_READ) && 835 (sc->dmatotal - sc->dmacount) < sc->bsize) { 836 /* Reading short block; do it through the internal buffer. */ 837 isa_dmastart(sc->dmaflags, sc->buf, sc->bsize, sc->chan); 838 } else 839 isa_dmastart(sc->dmaflags, sc->dmavaddr, sc->bsize, sc->chan); 840 } 841 842 /* start i/o operation */ 843 int 844 wtstart(sc, flag, vaddr, len) 845 struct wt_softc *sc; 846 int flag; 847 void *vaddr; 848 size_t len; 849 { 850 u_char s; 851 852 DEBUG(("wtstart()\n")); 853 s = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 854 if ((s & sc->NOEXCEP) == 0) { 855 sc->flags |= TPEXCEP; /* error */ 856 return 0; 857 } 858 sc->flags &= ~TPEXCEP; /* clear exception flag */ 859 sc->dmavaddr = vaddr; 860 sc->dmatotal = len; 861 sc->dmacount = 0; 862 sc->dmaflags = flag; 863 wtdma(sc); 864 return 1; 865 } 866 867 /* 868 * Start timer. 869 */ 870 void 871 wtclock(sc) 872 struct wt_softc *sc; 873 { 874 875 if (sc->flags & TPTIMER) 876 return; 877 sc->flags |= TPTIMER; 878 /* 879 * Some controllers seem to lose dma interrupts too often. To make the 880 * tape stream we need 1 tick timeout. 881 */ 882 timeout((timeout_t)wttimer, (caddr_t)sc, (sc->flags & TPACTIVE) ? 1 : hz); 883 } 884 885 /* 886 * Simulate an interrupt periodically while i/o is going. 887 * This is necessary in case interrupts get eaten due to 888 * multiple devices on a single IRQ line. 889 */ 890 void 891 wttimer(sc) 892 struct wt_softc *sc; 893 { 894 int s; 895 896 sc->flags &= ~TPTIMER; 897 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 898 return; 899 900 /* If i/o going, simulate interrupt. */ 901 s = splbio(); 902 if ((inb(sc->STATPORT) & (sc->BUSY | sc->NOEXCEP)) != (sc->BUSY | sc->NOEXCEP)) { 903 DEBUG(("wttimer() -- ")); 904 wtintr(sc); 905 } 906 splx(s); 907 908 /* Restart timer if i/o pending. */ 909 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 910 wtclock(sc); 911 } 912 913 /* 914 * Perform QIC-02 and QIC-36 compatible reset sequence. 915 */ 916 int 917 wtreset(sc) 918 struct wt_softc *sc; 919 { 920 u_char s; 921 int i; 922 923 outb(sc->CTLPORT, sc->RESET | sc->ONLINE); /* send reset */ 924 delay(30); 925 outb(sc->CTLPORT, sc->ONLINE); /* turn off reset */ 926 delay(30); 927 928 /* Read the controller status. */ 929 s = inb(sc->STATPORT); 930 if (s == 0xff) /* no port at this address? */ 931 return 0; 932 933 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 934 for (i = 0; i < 3000; ++i) { 935 if ((s & sc->BUSY) == 0 || (s & sc->NOEXCEP) == 0) 936 break; 937 delay(1000); 938 s = inb(sc->STATPORT); 939 } 940 return (s & sc->RESETMASK) == sc->RESETVAL; 941 } 942 943 /* 944 * Get controller status information. Return 0 if user i/o request should 945 * receive an i/o error code. 946 */ 947 int 948 wtsense(sc, verbose, ignore) 949 struct wt_softc *sc; 950 int verbose, ignore; 951 { 952 char *msg = 0; 953 int error; 954 955 DEBUG(("wtsense() ignore=0x%x\n", ignore)); 956 sc->flags &= ~(TPRO | TPWO); 957 if (!wtstatus(sc)) 958 return 0; 959 if ((sc->error & TP_ST0) == 0) 960 sc->error &= ~TP_ST0MASK; 961 if ((sc->error & TP_ST1) == 0) 962 sc->error &= ~TP_ST1MASK; 963 sc->error &= ~ignore; /* ignore certain errors */ 964 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 965 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 966 if (!error) 967 return 1; 968 if (!verbose) 969 return 0; 970 971 /* lifted from tdriver.c from Wangtek */ 972 if (error & TP_USL) 973 msg = "Drive not online"; 974 else if (error & TP_CNI) 975 msg = "No cartridge"; 976 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 977 msg = "Tape is write protected"; 978 sc->flags |= TPWP; 979 } else if (error & TP_FIL) 980 msg = 0 /*"Filemark detected"*/; 981 else if (error & TP_EOM) 982 msg = 0 /*"End of tape"*/; 983 else if (error & TP_BNL) 984 msg = "Block not located"; 985 else if (error & TP_UDA) 986 msg = "Unrecoverable data error"; 987 else if (error & TP_NDT) 988 msg = "No data detected"; 989 else if (error & TP_ILL) 990 msg = "Illegal command"; 991 if (msg) 992 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 993 return 0; 994 } 995 996 /* 997 * Get controller status information. 998 */ 999 int 1000 wtstatus(sc) 1001 struct wt_softc *sc; 1002 { 1003 char *p; 1004 1005 wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 1006 outb(sc->CMDPORT, QIC_RDSTAT); /* send `read status' command */ 1007 1008 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 1009 wtpoll(sc, sc->BUSY, sc->BUSY); /* wait for ready */ 1010 outb(sc->CTLPORT, sc->ONLINE); /* reset request */ 1011 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 1012 1013 p = (char *)&sc->error; 1014 while (p < (char *)&sc->error + 6) { 1015 u_char s = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); 1016 if ((s & sc->NOEXCEP) == 0) /* error */ 1017 return 0; 1018 1019 *p++ = inb(sc->DATAPORT); /* read status byte */ 1020 1021 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 1022 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 1023 outb(sc->CTLPORT, sc->ONLINE); /* unset request */ 1024 } 1025 return 1; 1026 } 1027
Indexes created Wed Oct 15 16:09:53 GMT 2025