wt.c revision 1.11
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 1.11 1994/04/07 06:51:21 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 return WT_NPORT; 206 207 /* Try Archive. */ 208 sc->type = ARCHIVE; 209 sc->CTLPORT = AV_CTLPORT(iobase); 210 sc->STATPORT = AV_STATPORT(iobase); 211 sc->CMDPORT = AV_CMDPORT(iobase); 212 sc->DATAPORT = AV_DATAPORT(iobase); 213 sc->SDMAPORT = AV_SDMAPORT(iobase); 214 sc->RDMAPORT = AV_RDMAPORT(iobase); 215 sc->BUSY = AV_BUSY; sc->NOEXCEP = AV_NOEXCEP; 216 sc->RESETMASK = AV_RESETMASK; sc->RESETVAL = AV_RESETVAL; 217 sc->ONLINE = 0; sc->RESET = AV_RESET; 218 sc->REQUEST = AV_REQUEST; sc->IEN = AV_IEN; 219 if (wtreset(sc)) 220 return AV_NPORT; 221 222 /* Tape controller not found. */ 223 sc->type = UNKNOWN; 224 return 0; 225 } 226 227 /* 228 * Device is found, configure it. 229 */ 230 void 231 wtattach(parent, self, aux) 232 struct device *parent, *self; 233 void *aux; 234 { 235 struct wt_softc *sc = (void *)self; 236 struct isa_attach_args *ia = aux; 237 238 if (sc->type == ARCHIVE) { 239 printf(": type <Archive>\n"); 240 /* Reset DMA. */ 241 outb(sc->RDMAPORT, 0); 242 } else 243 printf(": type <Wangtek>\n"); 244 sc->flags = TPSTART; /* tape is rewound */ 245 sc->dens = -1; /* unknown density */ 246 247 sc->sc_ih.ih_fun = wtintr; 248 sc->sc_ih.ih_arg = sc; 249 sc->sc_ih.ih_level = IPL_BIO; 250 intr_establish(ia->ia_irq, &sc->sc_ih); 251 } 252 253 int 254 wtdump(dev) 255 dev_t dev; 256 { 257 258 /* Not implemented. */ 259 return EINVAL; 260 } 261 262 int 263 wtsize(dev) 264 dev_t dev; 265 { 266 267 /* Not implemented. */ 268 return -1; 269 } 270 271 /* 272 * Open routine, called on every device open. 273 */ 274 int 275 wtopen(dev, flag) 276 dev_t dev; 277 int flag; 278 { 279 int unit = minor(dev) & T_UNIT; 280 struct wt_softc *sc; 281 int error; 282 283 if (unit >= wtcd.cd_ndevs) 284 return ENXIO; 285 sc = wtcd.cd_devs[unit]; 286 if (!sc) 287 return ENXIO; 288 289 /* Check that device is not in use */ 290 if (sc->flags & TPINUSE) 291 return EBUSY; 292 293 /* If the tape is in rewound state, check the status and set density. */ 294 if (sc->flags & TPSTART) { 295 /* If rewind is going on, wait */ 296 if (error = wtwait(sc, PCATCH, "wtrew")) 297 return error; 298 299 /* Check the controller status */ 300 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 301 /* Bad status, reset the controller. */ 302 if (!wtreset(sc)) 303 return EIO; 304 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 305 return EIO; 306 } 307 308 /* Set up tape density. */ 309 if (sc->dens != (minor(dev) & WT_DENSEL)) { 310 int d = 0; 311 312 switch (minor(dev) & WT_DENSEL) { 313 case WT_DENSDFLT: 314 default: 315 break; /* default density */ 316 case WT_QIC11: 317 d = QIC_FMT11; break; /* minor 010 */ 318 case WT_QIC24: 319 d = QIC_FMT24; break; /* minor 020 */ 320 case WT_QIC120: 321 d = QIC_FMT120; break; /* minor 030 */ 322 case WT_QIC150: 323 d = QIC_FMT150; break; /* minor 040 */ 324 case WT_QIC300: 325 d = QIC_FMT300; break; /* minor 050 */ 326 case WT_QIC600: 327 d = QIC_FMT600; break; /* minor 060 */ 328 } 329 if (d) { 330 /* Change tape density. */ 331 if (!wtcmd(sc, d)) 332 return EIO; 333 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 334 return EIO; 335 336 /* Check the status of the controller. */ 337 if (sc->error & TP_ILL) { 338 printf("%s: invalid tape density\n", 339 sc->sc_dev.dv_xname); 340 return ENODEV; 341 } 342 } 343 sc->dens = minor(dev) & WT_DENSEL; 344 } 345 sc->flags &= ~TPSTART; 346 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 347 return ENXIO; 348 349 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 350 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 351 352 sc->flags = TPINUSE; 353 if (flag & FREAD) 354 sc->flags |= TPREAD; 355 if (flag & FWRITE) 356 sc->flags |= TPWRITE; 357 return 0; 358 } 359 360 /* 361 * Close routine, called on last device close. 362 */ 363 int 364 wtclose(dev) 365 dev_t dev; 366 { 367 int unit = minor(dev) & T_UNIT; 368 struct wt_softc *sc = wtcd.cd_devs[unit]; 369 370 /* If rewind is pending, do nothing */ 371 if (sc->flags & TPREW) 372 goto done; 373 374 /* If seek forward is pending and no rewind on close, do nothing */ 375 if (sc->flags & TPRMARK) { 376 if (minor(dev) & T_NOREWIND) 377 goto done; 378 379 /* If read file mark is going on, wait */ 380 wtwait(sc, 0, "wtrfm"); 381 } 382 383 if (sc->flags & TPWANY) { 384 /* Tape was written. Write file mark. */ 385 wtwritefm(sc); 386 } 387 388 if ((minor(dev) & T_NOREWIND) == 0) { 389 /* Rewind to beginning of tape. */ 390 /* Don't wait until rewind, though. */ 391 wtrewind(sc); 392 goto done; 393 } 394 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 395 /* Space forward to after next file mark if no writing done. */ 396 /* Don't wait for completion. */ 397 wtreadfm(sc); 398 } 399 400 done: 401 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 402 free(sc->buf, M_TEMP); 403 return 0; 404 } 405 406 /* 407 * Ioctl routine. Compatible with BSD ioctls. 408 * Direct QIC-02 commands ERASE and RETENSION added. 409 * There are three possible ioctls: 410 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 411 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 412 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 413 */ 414 int 415 wtioctl(dev, cmd, addr, flag) 416 dev_t dev; 417 int cmd; 418 void *addr; 419 int flag; 420 { 421 int unit = minor(dev) & T_UNIT; 422 struct wt_softc *sc = wtcd.cd_devs[unit]; 423 int error, count, op; 424 425 switch (cmd) { 426 default: 427 return EINVAL; 428 case WTQICMD: /* direct QIC command */ 429 op = *(int *)addr; 430 switch (op) { 431 default: 432 return EINVAL; 433 case QIC_ERASE: /* erase the whole tape */ 434 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 435 return EACCES; 436 if (error = wtwait(sc, PCATCH, "wterase")) 437 return error; 438 break; 439 case QIC_RETENS: /* retension the tape */ 440 if (error = wtwait(sc, PCATCH, "wtretens")) 441 return error; 442 break; 443 } 444 /* Both ERASE and RETENS operations work like REWIND. */ 445 /* Simulate the rewind operation here. */ 446 sc->flags &= ~(TPRO | TPWO | TPVOL); 447 if (!wtcmd(sc, op)) 448 return EIO; 449 sc->flags |= TPSTART | TPREW; 450 if (op == QIC_ERASE) 451 sc->flags |= TPWANY; 452 wtclock(sc); 453 return 0; 454 case MTIOCIEOT: /* ignore EOT errors */ 455 case MTIOCEEOT: /* enable EOT errors */ 456 return 0; 457 case MTIOCGET: 458 ((struct mtget*)addr)->mt_type = 459 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 460 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 461 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 462 ((struct mtget*)addr)->mt_resid = 0; 463 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 464 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 465 return 0; 466 case MTIOCTOP: 467 break; 468 } 469 470 switch ((short)((struct mtop*)addr)->mt_op) { 471 default: 472 #if 0 473 case MTFSR: /* forward space record */ 474 case MTBSR: /* backward space record */ 475 case MTBSF: /* backward space file */ 476 #endif 477 return EINVAL; 478 case MTNOP: /* no operation, sets status only */ 479 case MTCACHE: /* enable controller cache */ 480 case MTNOCACHE: /* disable controller cache */ 481 return 0; 482 case MTREW: /* rewind */ 483 case MTOFFL: /* rewind and put the drive offline */ 484 if (sc->flags & TPREW) /* rewind is running */ 485 return 0; 486 if (error = wtwait(sc, PCATCH, "wtorew")) 487 return error; 488 wtrewind(sc); 489 return 0; 490 case MTFSF: /* forward space file */ 491 for (count = ((struct mtop*)addr)->mt_count; count > 0; 492 --count) { 493 if (error = wtwait(sc, PCATCH, "wtorfm")) 494 return error; 495 if (error = wtreadfm(sc)) 496 return error; 497 } 498 return 0; 499 case MTWEOF: /* write an end-of-file record */ 500 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 501 return EACCES; 502 if (error = wtwait(sc, PCATCH, "wtowfm")) 503 return error; 504 if (error = wtwritefm(sc)) 505 return error; 506 return 0; 507 } 508 509 #ifdef DIAGNOSTIC 510 panic("wtioctl: impossible"); 511 #endif 512 } 513 514 /* 515 * Strategy routine. 516 */ 517 void 518 wtstrategy(bp) 519 struct buf *bp; 520 { 521 int unit = minor(bp->b_dev) & T_UNIT; 522 struct wt_softc *sc = wtcd.cd_devs[unit]; 523 int s; 524 525 bp->b_resid = bp->b_bcount; 526 527 /* at file marks and end of tape, we just return '0 bytes available' */ 528 if (sc->flags & TPVOL) 529 goto xit; 530 531 if (bp->b_flags & B_READ) { 532 /* Check read access and no previous write to this tape. */ 533 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 534 goto errxit; 535 536 /* For now, we assume that all data will be copied out */ 537 /* If read command outstanding, just skip down */ 538 if ((sc->flags & TPRO) == 0) { 539 if (!wtsense(sc, 1, TP_WRP)) { 540 /* Clear status. */ 541 goto errxit; 542 } 543 if (!wtcmd(sc, QIC_RDDATA)) { 544 /* Set read mode. */ 545 wtsense(sc, 1, TP_WRP); 546 goto errxit; 547 } 548 sc->flags |= TPRO | TPRANY; 549 } 550 } else { 551 /* Check write access and write protection. */ 552 /* No previous read from this tape allowed. */ 553 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 554 goto errxit; 555 556 /* If write command outstanding, just skip down */ 557 if ((sc->flags & TPWO) == 0) { 558 if (!wtsense(sc, 1, 0)) { 559 /* Clear status. */ 560 goto errxit; 561 } 562 if (!wtcmd(sc, QIC_WRTDATA)) { 563 /* Set write mode. */ 564 wtsense(sc, 1, 0); 565 goto errxit; 566 } 567 sc->flags |= TPWO | TPWANY; 568 } 569 } 570 571 if (bp->b_bcount == 0) 572 goto xit; 573 574 sc->flags &= ~TPEXCEP; 575 s = splbio(); 576 if (wtstart(sc, bp->b_flags, bp->b_un.b_addr, bp->b_bcount)) { 577 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 578 bp->b_resid -= sc->dmacount; 579 } 580 splx(s); 581 582 if (sc->flags & TPEXCEP) { 583 errxit: 584 bp->b_flags |= B_ERROR; 585 bp->b_error = EIO; 586 } 587 xit: 588 biodone(bp); 589 return; 590 } 591 592 /* 593 * Interrupt routine. 594 */ 595 int 596 wtintr(sc) 597 struct wt_softc *sc; 598 { 599 u_char s; 600 601 s = inb(sc->STATPORT); /* get status */ 602 DEBUG(("wtintr() status=0x%x -- ", s)); 603 if ((s & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP)) { 604 DEBUG(("busy\n")); 605 return 0; /* device is busy */ 606 } 607 608 /* 609 * Check if rewind finished. 610 */ 611 if (sc->flags & TPREW) { 612 DEBUG(((s & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP) ? 613 "rewind busy?\n" : "rewind finished\n")); 614 sc->flags &= ~TPREW; /* rewind finished */ 615 wtsense(sc, 1, TP_WRP); 616 wakeup((caddr_t)sc); 617 return 1; 618 } 619 620 /* 621 * Check if writing/reading of file mark finished. 622 */ 623 if (sc->flags & (TPRMARK | TPWMARK)) { 624 DEBUG(((s & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP) ? 625 "marker r/w busy?\n" : "marker r/w finished\n")); 626 if ((s & sc->NOEXCEP) == 0) /* operation failed */ 627 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 628 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 629 wakeup((caddr_t)sc); 630 return 1; 631 } 632 633 /* 634 * Do we started any i/o? If no, just return. 635 */ 636 if ((sc->flags & TPACTIVE) == 0) { 637 DEBUG(("unexpected interrupt\n")); 638 return 0; 639 } 640 sc->flags &= ~TPACTIVE; 641 sc->dmacount += sc->bsize; /* increment counter */ 642 643 /* 644 * Clean up dma. 645 */ 646 if ((sc->dmaflags & B_READ) && 647 (sc->dmatotal - sc->dmacount) < sc->bsize) { 648 /* If reading short block, copy the internal buffer 649 * to the user memory. */ 650 isa_dmadone(sc->dmaflags, sc->buf, sc->bsize, sc->chan); 651 bcopy(sc->buf, sc->dmavaddr, sc->dmatotal - sc->dmacount); 652 } else 653 isa_dmadone(sc->dmaflags, sc->dmavaddr, sc->bsize, sc->chan); 654 655 /* 656 * On exception, check for end of file and end of volume. 657 */ 658 if ((s & sc->NOEXCEP) == 0) { 659 DEBUG(("i/o exception\n")); 660 wtsense(sc, 1, (sc->dmaflags & B_READ) ? TP_WRP : 0); 661 if (sc->error & (TP_EOM | TP_FIL)) 662 sc->flags |= TPVOL; /* end of file */ 663 else 664 sc->flags |= TPEXCEP; /* i/o error */ 665 wakeup((caddr_t)sc); 666 return 1; 667 } 668 669 if (sc->dmacount < sc->dmatotal) { 670 /* Continue I/O. */ 671 sc->dmavaddr += sc->bsize; 672 wtdma(sc); 673 DEBUG(("continue i/o, %d\n", sc->dmacount)); 674 return 1; 675 } 676 if (sc->dmacount > sc->dmatotal) /* short last block */ 677 sc->dmacount = sc->dmatotal; 678 /* Wake up user level. */ 679 wakeup((caddr_t)sc); 680 DEBUG(("i/o finished, %d\n", sc->dmacount)); 681 return 1; 682 } 683 684 /* start the rewind operation */ 685 void 686 wtrewind(sc) 687 struct wt_softc *sc; 688 { 689 int rwmode = sc->flags & (TPRO | TPWO); 690 691 sc->flags &= ~(TPRO | TPWO | TPVOL); 692 /* 693 * Wangtek strictly follows QIC-02 standard: 694 * clearing ONLINE in read/write modes causes rewind. 695 * REWIND command is not allowed in read/write mode 696 * and gives `illegal command' error. 697 */ 698 if (sc->type == WANGTEK && rwmode) { 699 outb(sc->CTLPORT, 0); 700 } else if (!wtcmd(sc, QIC_REWIND)) 701 return; 702 sc->flags |= TPSTART | TPREW; 703 wtclock(sc); 704 } 705 706 /* 707 * Start the `read marker' operation. 708 */ 709 int 710 wtreadfm(sc) 711 struct wt_softc *sc; 712 { 713 714 sc->flags &= ~(TPRO | TPWO | TPVOL); 715 if (!wtcmd(sc, QIC_READFM)) { 716 wtsense(sc, 1, TP_WRP); 717 return EIO; 718 } 719 sc->flags |= TPRMARK | TPRANY; 720 wtclock(sc); 721 /* Don't wait for completion here. */ 722 return 0; 723 } 724 725 /* 726 * Write marker to the tape. 727 */ 728 int 729 wtwritefm(sc) 730 struct wt_softc *sc; 731 { 732 733 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 734 sc->flags &= ~(TPRO | TPWO); 735 if (!wtcmd(sc, QIC_WRITEFM)) { 736 wtsense(sc, 1, 0); 737 return EIO; 738 } 739 sc->flags |= TPWMARK | TPWANY; 740 wtclock(sc); 741 return wtwait(sc, 0, "wtwfm"); 742 } 743 744 /* 745 * While controller status & mask == bits continue waiting. 746 */ 747 u_char 748 wtpoll(sc, mask, bits) 749 struct wt_softc *sc; 750 int mask, bits; 751 { 752 u_char s; 753 int i; 754 755 /* Poll status port, waiting for specified bits. */ 756 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 757 s = inb(sc->STATPORT); 758 if ((s & mask) != bits) 759 return s; 760 delay(1); 761 } 762 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 763 s = inb(sc->STATPORT); 764 if ((s & mask) != bits) 765 return s; 766 delay(100); 767 } 768 for (;;) { /* forever */ 769 s = inb(sc->STATPORT); 770 if ((s & mask) != bits) 771 return s; 772 tsleep((caddr_t)wtpoll, WTPRI, "wtpoll", 1); 773 } 774 } 775 776 /* 777 * Execute QIC command. 778 */ 779 int 780 wtcmd(sc, cmd) 781 struct wt_softc *sc; 782 int cmd; 783 { 784 u_char s; 785 786 DEBUG(("wtcmd() cmd=0x%x\n", cmd)); 787 s = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 788 if ((s & sc->NOEXCEP) == 0) /* error */ 789 return 0; 790 791 outb(sc->CMDPORT, cmd); /* output the command */ 792 793 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 794 wtpoll(sc, sc->BUSY, sc->BUSY); /* wait for ready */ 795 outb(sc->CTLPORT, sc->IEN | sc->ONLINE); /* reset request */ 796 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 797 return 1; 798 } 799 800 /* wait for the end of i/o, seeking marker or rewind operation */ 801 int 802 wtwait(sc, catch, msg) 803 struct wt_softc *sc; 804 int catch; 805 char *msg; 806 { 807 int error; 808 809 DEBUG(("wtwait() `%s'\n", msg)); 810 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 811 if (error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) 812 return error; 813 return 0; 814 } 815 816 /* initialize dma for the i/o operation */ 817 void 818 wtdma(sc) 819 struct wt_softc *sc; 820 { 821 822 sc->flags |= TPACTIVE; 823 wtclock(sc); 824 825 if (sc->type == ARCHIVE) { 826 /* Set DMA. */ 827 outb(sc->SDMAPORT, 0); 828 } 829 830 if ((sc->dmaflags & B_READ) && 831 (sc->dmatotal - sc->dmacount) < sc->bsize) { 832 /* Reading short block; do it through the internal buffer. */ 833 isa_dmastart(sc->dmaflags, sc->buf, sc->bsize, sc->chan); 834 } else 835 isa_dmastart(sc->dmaflags, sc->dmavaddr, sc->bsize, sc->chan); 836 } 837 838 /* start i/o operation */ 839 int 840 wtstart(sc, flag, vaddr, len) 841 struct wt_softc *sc; 842 int flag; 843 void *vaddr; 844 size_t len; 845 { 846 u_char s; 847 848 DEBUG(("wtstart()\n")); 849 s = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 850 if ((s & sc->NOEXCEP) == 0) { 851 sc->flags |= TPEXCEP; /* error */ 852 return 0; 853 } 854 sc->flags &= ~TPEXCEP; /* clear exception flag */ 855 sc->dmavaddr = vaddr; 856 sc->dmatotal = len; 857 sc->dmacount = 0; 858 sc->dmaflags = flag; 859 wtdma(sc); 860 return 1; 861 } 862 863 /* 864 * Start timer. 865 */ 866 void 867 wtclock(sc) 868 struct wt_softc *sc; 869 { 870 871 if (sc->flags & TPTIMER) 872 return; 873 sc->flags |= TPTIMER; 874 /* 875 * Some controllers seem to lose dma interrupts too often. To make the 876 * tape stream we need 1 tick timeout. 877 */ 878 timeout((timeout_t)wttimer, (caddr_t)sc, (sc->flags & TPACTIVE) ? 1 : hz); 879 } 880 881 /* 882 * Simulate an interrupt periodically while i/o is going. 883 * This is necessary in case interrupts get eaten due to 884 * multiple devices on a single IRQ line. 885 */ 886 void 887 wttimer(sc) 888 struct wt_softc *sc; 889 { 890 int s; 891 892 sc->flags &= ~TPTIMER; 893 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 894 return; 895 896 /* If i/o going, simulate interrupt. */ 897 s = splbio(); 898 if ((inb(sc->STATPORT) & (sc->BUSY | sc->NOEXCEP)) != (sc->BUSY | sc->NOEXCEP)) { 899 DEBUG(("wttimer() -- ")); 900 wtintr(sc); 901 } 902 splx(s); 903 904 /* Restart timer if i/o pending. */ 905 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 906 wtclock(sc); 907 } 908 909 /* 910 * Perform QIC-02 and QIC-36 compatible reset sequence. 911 */ 912 int 913 wtreset(sc) 914 struct wt_softc *sc; 915 { 916 u_char s; 917 int i; 918 919 outb(sc->CTLPORT, sc->RESET | sc->ONLINE); /* send reset */ 920 delay(30); 921 outb(sc->CTLPORT, sc->ONLINE); /* turn off reset */ 922 delay(30); 923 924 /* Read the controller status. */ 925 s = inb(sc->STATPORT); 926 if (s == 0xff) /* no port at this address? */ 927 return 0; 928 929 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 930 for (i = 0; i < 3000; ++i) { 931 if ((s & sc->BUSY) == 0 || (s & sc->NOEXCEP) == 0) 932 break; 933 delay(1000); 934 s = inb(sc->STATPORT); 935 } 936 return (s & sc->RESETMASK) == sc->RESETVAL; 937 } 938 939 /* 940 * Get controller status information. Return 0 if user i/o request should 941 * receive an i/o error code. 942 */ 943 int 944 wtsense(sc, verbose, ignore) 945 struct wt_softc *sc; 946 int verbose, ignore; 947 { 948 char *msg = 0; 949 int error; 950 951 DEBUG(("wtsense() ignore=0x%x\n", ignore)); 952 sc->flags &= ~(TPRO | TPWO); 953 if (!wtstatus(sc)) 954 return 0; 955 if ((sc->error & TP_ST0) == 0) 956 sc->error &= ~TP_ST0MASK; 957 if ((sc->error & TP_ST1) == 0) 958 sc->error &= ~TP_ST1MASK; 959 sc->error &= ~ignore; /* ignore certain errors */ 960 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 961 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 962 if (!error) 963 return 1; 964 if (!verbose) 965 return 0; 966 967 /* lifted from tdriver.c from Wangtek */ 968 if (error & TP_USL) 969 msg = "Drive not online"; 970 else if (error & TP_CNI) 971 msg = "No cartridge"; 972 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 973 msg = "Tape is write protected"; 974 sc->flags |= TPWP; 975 } else if (error & TP_FIL) 976 msg = 0 /*"Filemark detected"*/; 977 else if (error & TP_EOM) 978 msg = 0 /*"End of tape"*/; 979 else if (error & TP_BNL) 980 msg = "Block not located"; 981 else if (error & TP_UDA) 982 msg = "Unrecoverable data error"; 983 else if (error & TP_NDT) 984 msg = "No data detected"; 985 else if (error & TP_ILL) 986 msg = "Illegal command"; 987 if (msg) 988 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 989 return 0; 990 } 991 992 /* 993 * Get controller status information. 994 */ 995 int 996 wtstatus(sc) 997 struct wt_softc *sc; 998 { 999 char *p; 1000 1001 wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 1002 outb(sc->CMDPORT, QIC_RDSTAT); /* send `read status' command */ 1003 1004 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 1005 wtpoll(sc, sc->BUSY, sc->BUSY); /* wait for ready */ 1006 outb(sc->CTLPORT, sc->ONLINE); /* reset request */ 1007 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 1008 1009 p = (char *)&sc->error; 1010 while (p < (char *)&sc->error + 6) { 1011 u_char s = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); 1012 if ((s & sc->NOEXCEP) == 0) /* error */ 1013 return 0; 1014 1015 *p++ = inb(sc->DATAPORT); /* read status byte */ 1016 1017 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 1018 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 1019 outb(sc->CTLPORT, sc->ONLINE); /* unset request */ 1020 } 1021 return 1; 1022 } 1023
Indexes created Tue Sep 23 14:10:03 GMT 2025