wt.c revision 1.25
1 /* $NetBSD: wt.c,v 1.25 1995/06/26 05:37:16 cgd 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 DEBUG(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, B_READ or B_WRITE */ 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 cfdriver wtcd = { 171 NULL, "wt", wtprobe, wtattach, DV_TAPE, sizeof(struct wt_softc) 172 }; 173 174 /* 175 * Probe for the presence of the device. 176 */ 177 int 178 wtprobe(parent, match, aux) 179 struct device *parent; 180 void *match, *aux; 181 { 182 struct wt_softc *sc = match; 183 struct isa_attach_args *ia = aux; 184 int iobase; 185 186 sc->chan = ia->ia_drq; 187 sc->sc_iobase = iobase = ia->ia_iobase; 188 if (sc->chan < 1 || sc->chan > 3) { 189 printf("%s: Bad drq=%d, should be 1..3\n", sc->sc_dev.dv_xname, 190 sc->chan); 191 return 0; 192 } 193 194 /* Try Wangtek. */ 195 sc->type = WANGTEK; 196 sc->CTLPORT = WT_CTLPORT(iobase); 197 sc->STATPORT = WT_STATPORT(iobase); 198 sc->CMDPORT = WT_CMDPORT(iobase); 199 sc->DATAPORT = WT_DATAPORT(iobase); 200 sc->SDMAPORT = sc->RDMAPORT = 0; 201 sc->BUSY = WT_BUSY; sc->NOEXCEP = WT_NOEXCEP; 202 sc->RESETMASK = WT_RESETMASK; sc->RESETVAL = WT_RESETVAL; 203 sc->ONLINE = WT_ONLINE; sc->RESET = WT_RESET; 204 sc->REQUEST = WT_REQUEST; sc->IEN = WT_IEN; 205 if (wtreset(sc)) { 206 ia->ia_iosize = WT_NPORT; 207 return 1; 208 } 209 210 /* Try Archive. */ 211 sc->type = ARCHIVE; 212 sc->CTLPORT = AV_CTLPORT(iobase); 213 sc->STATPORT = AV_STATPORT(iobase); 214 sc->CMDPORT = AV_CMDPORT(iobase); 215 sc->DATAPORT = AV_DATAPORT(iobase); 216 sc->SDMAPORT = AV_SDMAPORT(iobase); 217 sc->RDMAPORT = AV_RDMAPORT(iobase); 218 sc->BUSY = AV_BUSY; sc->NOEXCEP = AV_NOEXCEP; 219 sc->RESETMASK = AV_RESETMASK; sc->RESETVAL = AV_RESETVAL; 220 sc->ONLINE = 0; sc->RESET = AV_RESET; 221 sc->REQUEST = AV_REQUEST; sc->IEN = AV_IEN; 222 if (wtreset(sc)) { 223 ia->ia_iosize = AV_NPORT; 224 return 1; 225 } 226 227 /* Tape controller not found. */ 228 sc->type = UNKNOWN; 229 return 0; 230 } 231 232 /* 233 * Device is found, configure it. 234 */ 235 void 236 wtattach(parent, self, aux) 237 struct device *parent, *self; 238 void *aux; 239 { 240 struct wt_softc *sc = (void *)self; 241 struct isa_attach_args *ia = aux; 242 243 if (sc->type == ARCHIVE) { 244 printf(": type <Archive>\n"); 245 /* Reset DMA. */ 246 outb(sc->RDMAPORT, 0); 247 } else 248 printf(": type <Wangtek>\n"); 249 sc->flags = TPSTART; /* tape is rewound */ 250 sc->dens = -1; /* unknown density */ 251 252 sc->sc_ih = isa_intr_establish(ia->ia_irq, ISA_IST_EDGE, ISA_IPL_BIO, 253 wtintr, sc); 254 } 255 256 int 257 wtdump(dev, blkno, va, size) 258 dev_t dev; 259 daddr_t blkno; 260 caddr_t va; 261 size_t size; 262 { 263 264 /* Not implemented. */ 265 return ENXIO; 266 } 267 268 int 269 wtsize(dev) 270 dev_t dev; 271 { 272 273 /* Not implemented. */ 274 return -1; 275 } 276 277 /* 278 * Open routine, called on every device open. 279 */ 280 int 281 wtopen(dev, flag) 282 dev_t dev; 283 int flag; 284 { 285 int unit = minor(dev) & T_UNIT; 286 struct wt_softc *sc; 287 int error; 288 289 if (unit >= wtcd.cd_ndevs) 290 return ENXIO; 291 sc = wtcd.cd_devs[unit]; 292 if (!sc) 293 return ENXIO; 294 295 /* Check that device is not in use */ 296 if (sc->flags & TPINUSE) 297 return EBUSY; 298 299 /* If the tape is in rewound state, check the status and set density. */ 300 if (sc->flags & TPSTART) { 301 /* If rewind is going on, wait */ 302 if (error = wtwait(sc, PCATCH, "wtrew")) 303 return error; 304 305 /* Check the controller status */ 306 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 307 /* Bad status, reset the controller. */ 308 if (!wtreset(sc)) 309 return EIO; 310 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 311 return EIO; 312 } 313 314 /* Set up tape density. */ 315 if (sc->dens != (minor(dev) & WT_DENSEL)) { 316 int d = 0; 317 318 switch (minor(dev) & WT_DENSEL) { 319 case WT_DENSDFLT: 320 default: 321 break; /* default density */ 322 case WT_QIC11: 323 d = QIC_FMT11; break; /* minor 010 */ 324 case WT_QIC24: 325 d = QIC_FMT24; break; /* minor 020 */ 326 case WT_QIC120: 327 d = QIC_FMT120; break; /* minor 030 */ 328 case WT_QIC150: 329 d = QIC_FMT150; break; /* minor 040 */ 330 case WT_QIC300: 331 d = QIC_FMT300; break; /* minor 050 */ 332 case WT_QIC600: 333 d = QIC_FMT600; break; /* minor 060 */ 334 } 335 if (d) { 336 /* Change tape density. */ 337 if (!wtcmd(sc, d)) 338 return EIO; 339 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 340 return EIO; 341 342 /* Check the status of the controller. */ 343 if (sc->error & TP_ILL) { 344 printf("%s: invalid tape density\n", 345 sc->sc_dev.dv_xname); 346 return ENODEV; 347 } 348 } 349 sc->dens = minor(dev) & WT_DENSEL; 350 } 351 sc->flags &= ~TPSTART; 352 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 353 return ENXIO; 354 355 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 356 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 357 358 sc->flags = TPINUSE; 359 if (flag & FREAD) 360 sc->flags |= TPREAD; 361 if (flag & FWRITE) 362 sc->flags |= TPWRITE; 363 return 0; 364 } 365 366 /* 367 * Close routine, called on last device close. 368 */ 369 int 370 wtclose(dev) 371 dev_t dev; 372 { 373 int unit = minor(dev) & T_UNIT; 374 struct wt_softc *sc = wtcd.cd_devs[unit]; 375 376 /* If rewind is pending, do nothing */ 377 if (sc->flags & TPREW) 378 goto done; 379 380 /* If seek forward is pending and no rewind on close, do nothing */ 381 if (sc->flags & TPRMARK) { 382 if (minor(dev) & T_NOREWIND) 383 goto done; 384 385 /* If read file mark is going on, wait */ 386 wtwait(sc, 0, "wtrfm"); 387 } 388 389 if (sc->flags & TPWANY) { 390 /* Tape was written. Write file mark. */ 391 wtwritefm(sc); 392 } 393 394 if ((minor(dev) & T_NOREWIND) == 0) { 395 /* Rewind to beginning of tape. */ 396 /* Don't wait until rewind, though. */ 397 wtrewind(sc); 398 goto done; 399 } 400 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 401 /* Space forward to after next file mark if no writing done. */ 402 /* Don't wait for completion. */ 403 wtreadfm(sc); 404 } 405 406 done: 407 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 408 free(sc->buf, M_TEMP); 409 return 0; 410 } 411 412 /* 413 * Ioctl routine. Compatible with BSD ioctls. 414 * Direct QIC-02 commands ERASE and RETENSION added. 415 * There are three possible ioctls: 416 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 417 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 418 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 419 */ 420 int 421 wtioctl(dev, cmd, addr, flag) 422 dev_t dev; 423 u_long cmd; 424 void *addr; 425 int flag; 426 { 427 int unit = minor(dev) & T_UNIT; 428 struct wt_softc *sc = wtcd.cd_devs[unit]; 429 int error, count, op; 430 431 switch (cmd) { 432 default: 433 return EINVAL; 434 case WTQICMD: /* direct QIC command */ 435 op = *(int *)addr; 436 switch (op) { 437 default: 438 return EINVAL; 439 case QIC_ERASE: /* erase the whole tape */ 440 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 441 return EACCES; 442 if (error = wtwait(sc, PCATCH, "wterase")) 443 return error; 444 break; 445 case QIC_RETENS: /* retension the tape */ 446 if (error = wtwait(sc, PCATCH, "wtretens")) 447 return error; 448 break; 449 } 450 /* Both ERASE and RETENS operations work like REWIND. */ 451 /* Simulate the rewind operation here. */ 452 sc->flags &= ~(TPRO | TPWO | TPVOL); 453 if (!wtcmd(sc, op)) 454 return EIO; 455 sc->flags |= TPSTART | TPREW; 456 if (op == QIC_ERASE) 457 sc->flags |= TPWANY; 458 wtclock(sc); 459 return 0; 460 case MTIOCIEOT: /* ignore EOT errors */ 461 case MTIOCEEOT: /* enable EOT errors */ 462 return 0; 463 case MTIOCGET: 464 ((struct mtget*)addr)->mt_type = 465 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 466 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 467 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 468 ((struct mtget*)addr)->mt_resid = 0; 469 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 470 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 471 return 0; 472 case MTIOCTOP: 473 break; 474 } 475 476 switch ((short)((struct mtop*)addr)->mt_op) { 477 default: 478 #if 0 479 case MTFSR: /* forward space record */ 480 case MTBSR: /* backward space record */ 481 case MTBSF: /* backward space file */ 482 #endif 483 return EINVAL; 484 case MTNOP: /* no operation, sets status only */ 485 case MTCACHE: /* enable controller cache */ 486 case MTNOCACHE: /* disable controller cache */ 487 return 0; 488 case MTREW: /* rewind */ 489 case MTOFFL: /* rewind and put the drive offline */ 490 if (sc->flags & TPREW) /* rewind is running */ 491 return 0; 492 if (error = wtwait(sc, PCATCH, "wtorew")) 493 return error; 494 wtrewind(sc); 495 return 0; 496 case MTFSF: /* forward space file */ 497 for (count = ((struct mtop*)addr)->mt_count; count > 0; 498 --count) { 499 if (error = wtwait(sc, PCATCH, "wtorfm")) 500 return error; 501 if (error = wtreadfm(sc)) 502 return error; 503 } 504 return 0; 505 case MTWEOF: /* write an end-of-file record */ 506 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 507 return EACCES; 508 if (error = wtwait(sc, PCATCH, "wtowfm")) 509 return error; 510 if (error = wtwritefm(sc)) 511 return error; 512 return 0; 513 } 514 515 #ifdef DIAGNOSTIC 516 panic("wtioctl: impossible"); 517 #endif 518 } 519 520 /* 521 * Strategy routine. 522 */ 523 void 524 wtstrategy(bp) 525 struct buf *bp; 526 { 527 int unit = minor(bp->b_dev) & T_UNIT; 528 struct wt_softc *sc = wtcd.cd_devs[unit]; 529 int s; 530 531 bp->b_resid = bp->b_bcount; 532 533 /* at file marks and end of tape, we just return '0 bytes available' */ 534 if (sc->flags & TPVOL) 535 goto xit; 536 537 if (bp->b_flags & B_READ) { 538 /* Check read access and no previous write to this tape. */ 539 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 540 goto errxit; 541 542 /* For now, we assume that all data will be copied out */ 543 /* If read command outstanding, just skip down */ 544 if ((sc->flags & TPRO) == 0) { 545 if (!wtsense(sc, 1, TP_WRP)) { 546 /* Clear status. */ 547 goto errxit; 548 } 549 if (!wtcmd(sc, QIC_RDDATA)) { 550 /* Set read mode. */ 551 wtsense(sc, 1, TP_WRP); 552 goto errxit; 553 } 554 sc->flags |= TPRO | TPRANY; 555 } 556 } else { 557 /* Check write access and write protection. */ 558 /* No previous read from this tape allowed. */ 559 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 560 goto errxit; 561 562 /* If write command outstanding, just skip down */ 563 if ((sc->flags & TPWO) == 0) { 564 if (!wtsense(sc, 1, 0)) { 565 /* Clear status. */ 566 goto errxit; 567 } 568 if (!wtcmd(sc, QIC_WRTDATA)) { 569 /* Set write mode. */ 570 wtsense(sc, 1, 0); 571 goto errxit; 572 } 573 sc->flags |= TPWO | TPWANY; 574 } 575 } 576 577 if (bp->b_bcount == 0) 578 goto xit; 579 580 sc->flags &= ~TPEXCEP; 581 s = splbio(); 582 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 583 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 584 bp->b_resid -= sc->dmacount; 585 } 586 splx(s); 587 588 if (sc->flags & TPEXCEP) { 589 errxit: 590 bp->b_flags |= B_ERROR; 591 bp->b_error = EIO; 592 } 593 xit: 594 biodone(bp); 595 return; 596 } 597 598 /* 599 * Interrupt routine. 600 */ 601 int 602 wtintr(arg) 603 void *arg; 604 { 605 struct wt_softc *sc = arg; 606 u_char x; 607 608 x = inb(sc->STATPORT); /* get status */ 609 DEBUG(("wtintr() status=0x%x -- ", x)); 610 if ((x & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP)) { 611 DEBUG(("busy\n")); 612 return 0; /* device is busy */ 613 } 614 615 /* 616 * Check if rewind finished. 617 */ 618 if (sc->flags & TPREW) { 619 DEBUG(((x & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP) ? 620 "rewind busy?\n" : "rewind finished\n")); 621 sc->flags &= ~TPREW; /* rewind finished */ 622 wtsense(sc, 1, TP_WRP); 623 wakeup((caddr_t)sc); 624 return 1; 625 } 626 627 /* 628 * Check if writing/reading of file mark finished. 629 */ 630 if (sc->flags & (TPRMARK | TPWMARK)) { 631 DEBUG(((x & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP) ? 632 "marker r/w busy?\n" : "marker r/w finished\n")); 633 if ((x & sc->NOEXCEP) == 0) /* operation failed */ 634 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 635 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 636 wakeup((caddr_t)sc); 637 return 1; 638 } 639 640 /* 641 * Do we started any i/o? If no, just return. 642 */ 643 if ((sc->flags & TPACTIVE) == 0) { 644 DEBUG(("unexpected interrupt\n")); 645 return 0; 646 } 647 sc->flags &= ~TPACTIVE; 648 sc->dmacount += sc->bsize; /* increment counter */ 649 650 /* 651 * Clean up dma. 652 */ 653 if ((sc->dmaflags & B_READ) && 654 (sc->dmatotal - sc->dmacount) < sc->bsize) { 655 /* If reading short block, copy the internal buffer 656 * to the user memory. */ 657 isa_dmadone(sc->dmaflags, sc->buf, sc->bsize, sc->chan); 658 bcopy(sc->buf, sc->dmavaddr, sc->dmatotal - sc->dmacount); 659 } else 660 isa_dmadone(sc->dmaflags, sc->dmavaddr, sc->bsize, sc->chan); 661 662 /* 663 * On exception, check for end of file and end of volume. 664 */ 665 if ((x & sc->NOEXCEP) == 0) { 666 DEBUG(("i/o exception\n")); 667 wtsense(sc, 1, (sc->dmaflags & B_READ) ? TP_WRP : 0); 668 if (sc->error & (TP_EOM | TP_FIL)) 669 sc->flags |= TPVOL; /* end of file */ 670 else 671 sc->flags |= TPEXCEP; /* i/o error */ 672 wakeup((caddr_t)sc); 673 return 1; 674 } 675 676 if (sc->dmacount < sc->dmatotal) { 677 /* Continue I/O. */ 678 sc->dmavaddr += sc->bsize; 679 wtdma(sc); 680 DEBUG(("continue i/o, %d\n", sc->dmacount)); 681 return 1; 682 } 683 if (sc->dmacount > sc->dmatotal) /* short last block */ 684 sc->dmacount = sc->dmatotal; 685 /* Wake up user level. */ 686 wakeup((caddr_t)sc); 687 DEBUG(("i/o finished, %d\n", sc->dmacount)); 688 return 1; 689 } 690 691 /* start the rewind operation */ 692 void 693 wtrewind(sc) 694 struct wt_softc *sc; 695 { 696 int rwmode = sc->flags & (TPRO | TPWO); 697 698 sc->flags &= ~(TPRO | TPWO | TPVOL); 699 /* 700 * Wangtek strictly follows QIC-02 standard: 701 * clearing ONLINE in read/write modes causes rewind. 702 * REWIND command is not allowed in read/write mode 703 * and gives `illegal command' error. 704 */ 705 if (sc->type == WANGTEK && rwmode) { 706 outb(sc->CTLPORT, 0); 707 } else if (!wtcmd(sc, QIC_REWIND)) 708 return; 709 sc->flags |= TPSTART | TPREW; 710 wtclock(sc); 711 } 712 713 /* 714 * Start the `read marker' operation. 715 */ 716 int 717 wtreadfm(sc) 718 struct wt_softc *sc; 719 { 720 721 sc->flags &= ~(TPRO | TPWO | TPVOL); 722 if (!wtcmd(sc, QIC_READFM)) { 723 wtsense(sc, 1, TP_WRP); 724 return EIO; 725 } 726 sc->flags |= TPRMARK | TPRANY; 727 wtclock(sc); 728 /* Don't wait for completion here. */ 729 return 0; 730 } 731 732 /* 733 * Write marker to the tape. 734 */ 735 int 736 wtwritefm(sc) 737 struct wt_softc *sc; 738 { 739 740 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 741 sc->flags &= ~(TPRO | TPWO); 742 if (!wtcmd(sc, QIC_WRITEFM)) { 743 wtsense(sc, 1, 0); 744 return EIO; 745 } 746 sc->flags |= TPWMARK | TPWANY; 747 wtclock(sc); 748 return wtwait(sc, 0, "wtwfm"); 749 } 750 751 /* 752 * While controller status & mask == bits continue waiting. 753 */ 754 u_char 755 wtpoll(sc, mask, bits) 756 struct wt_softc *sc; 757 int mask, bits; 758 { 759 u_char x; 760 int i; 761 762 /* Poll status port, waiting for specified bits. */ 763 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 764 x = inb(sc->STATPORT); 765 if ((x & mask) != bits) 766 return x; 767 delay(1); 768 } 769 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 770 x = inb(sc->STATPORT); 771 if ((x & mask) != bits) 772 return x; 773 delay(100); 774 } 775 for (;;) { /* forever */ 776 x = inb(sc->STATPORT); 777 if ((x & mask) != bits) 778 return x; 779 tsleep((caddr_t)wtpoll, WTPRI, "wtpoll", 1); 780 } 781 } 782 783 /* 784 * Execute QIC command. 785 */ 786 int 787 wtcmd(sc, cmd) 788 struct wt_softc *sc; 789 int cmd; 790 { 791 u_char x; 792 int s; 793 794 DEBUG(("wtcmd() cmd=0x%x\n", cmd)); 795 s = splbio(); 796 x = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 797 if ((x & sc->NOEXCEP) == 0) { /* error */ 798 splx(s); 799 return 0; 800 } 801 802 outb(sc->CMDPORT, cmd); /* output the command */ 803 804 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 805 wtpoll(sc, sc->BUSY, sc->BUSY); /* wait for ready */ 806 outb(sc->CTLPORT, sc->IEN | sc->ONLINE); /* reset request */ 807 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 808 splx(s); 809 return 1; 810 } 811 812 /* wait for the end of i/o, seeking marker or rewind operation */ 813 int 814 wtwait(sc, catch, msg) 815 struct wt_softc *sc; 816 int catch; 817 char *msg; 818 { 819 int error; 820 821 DEBUG(("wtwait() `%s'\n", msg)); 822 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 823 if (error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) 824 return error; 825 return 0; 826 } 827 828 /* initialize dma for the i/o operation */ 829 void 830 wtdma(sc) 831 struct wt_softc *sc; 832 { 833 834 sc->flags |= TPACTIVE; 835 wtclock(sc); 836 837 if (sc->type == ARCHIVE) { 838 /* Set DMA. */ 839 outb(sc->SDMAPORT, 0); 840 } 841 842 if ((sc->dmaflags & B_READ) && 843 (sc->dmatotal - sc->dmacount) < sc->bsize) { 844 /* Reading short block; do it through the internal buffer. */ 845 isa_dmastart(sc->dmaflags, sc->buf, sc->bsize, sc->chan); 846 } else 847 isa_dmastart(sc->dmaflags, sc->dmavaddr, sc->bsize, sc->chan); 848 } 849 850 /* start i/o operation */ 851 int 852 wtstart(sc, flag, vaddr, len) 853 struct wt_softc *sc; 854 int flag; 855 void *vaddr; 856 size_t len; 857 { 858 u_char x; 859 860 DEBUG(("wtstart()\n")); 861 x = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 862 if ((x & sc->NOEXCEP) == 0) { 863 sc->flags |= TPEXCEP; /* error */ 864 return 0; 865 } 866 sc->flags &= ~TPEXCEP; /* clear exception flag */ 867 sc->dmavaddr = vaddr; 868 sc->dmatotal = len; 869 sc->dmacount = 0; 870 sc->dmaflags = flag; 871 wtdma(sc); 872 return 1; 873 } 874 875 /* 876 * Start timer. 877 */ 878 void 879 wtclock(sc) 880 struct wt_softc *sc; 881 { 882 883 if (sc->flags & TPTIMER) 884 return; 885 sc->flags |= TPTIMER; 886 /* 887 * Some controllers seem to lose dma interrupts too often. To make the 888 * tape stream we need 1 tick timeout. 889 */ 890 timeout(wttimer, sc, (sc->flags & TPACTIVE) ? 1 : hz); 891 } 892 893 /* 894 * Simulate an interrupt periodically while i/o is going. 895 * This is necessary in case interrupts get eaten due to 896 * multiple devices on a single IRQ line. 897 */ 898 void 899 wttimer(arg) 900 void *arg; 901 { 902 struct wt_softc *sc = (struct wt_softc *)arg; 903 int s; 904 905 sc->flags &= ~TPTIMER; 906 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 907 return; 908 909 /* If i/o going, simulate interrupt. */ 910 s = splbio(); 911 if ((inb(sc->STATPORT) & (sc->BUSY | sc->NOEXCEP)) != (sc->BUSY | sc->NOEXCEP)) { 912 DEBUG(("wttimer() -- ")); 913 wtintr(sc); 914 } 915 splx(s); 916 917 /* Restart timer if i/o pending. */ 918 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 919 wtclock(sc); 920 } 921 922 /* 923 * Perform QIC-02 and QIC-36 compatible reset sequence. 924 */ 925 int 926 wtreset(sc) 927 struct wt_softc *sc; 928 { 929 u_char x; 930 int i; 931 932 outb(sc->CTLPORT, sc->RESET | sc->ONLINE); /* send reset */ 933 delay(30); 934 outb(sc->CTLPORT, sc->ONLINE); /* turn off reset */ 935 delay(30); 936 937 /* Read the controller status. */ 938 x = inb(sc->STATPORT); 939 if (x == 0xff) /* no port at this address? */ 940 return 0; 941 942 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 943 for (i = 0; i < 3000; ++i) { 944 if ((x & sc->BUSY) == 0 || (x & sc->NOEXCEP) == 0) 945 break; 946 delay(1000); 947 x = inb(sc->STATPORT); 948 } 949 return (x & sc->RESETMASK) == sc->RESETVAL; 950 } 951 952 /* 953 * Get controller status information. Return 0 if user i/o request should 954 * receive an i/o error code. 955 */ 956 int 957 wtsense(sc, verbose, ignore) 958 struct wt_softc *sc; 959 int verbose, ignore; 960 { 961 char *msg = 0; 962 int error; 963 964 DEBUG(("wtsense() ignore=0x%x\n", ignore)); 965 sc->flags &= ~(TPRO | TPWO); 966 if (!wtstatus(sc)) 967 return 0; 968 if ((sc->error & TP_ST0) == 0) 969 sc->error &= ~TP_ST0MASK; 970 if ((sc->error & TP_ST1) == 0) 971 sc->error &= ~TP_ST1MASK; 972 sc->error &= ~ignore; /* ignore certain errors */ 973 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 974 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 975 if (!error) 976 return 1; 977 if (!verbose) 978 return 0; 979 980 /* lifted from tdriver.c from Wangtek */ 981 if (error & TP_USL) 982 msg = "Drive not online"; 983 else if (error & TP_CNI) 984 msg = "No cartridge"; 985 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 986 msg = "Tape is write protected"; 987 sc->flags |= TPWP; 988 } else if (error & TP_FIL) 989 msg = 0 /*"Filemark detected"*/; 990 else if (error & TP_EOM) 991 msg = 0 /*"End of tape"*/; 992 else if (error & TP_BNL) 993 msg = "Block not located"; 994 else if (error & TP_UDA) 995 msg = "Unrecoverable data error"; 996 else if (error & TP_NDT) 997 msg = "No data detected"; 998 else if (error & TP_ILL) 999 msg = "Illegal command"; 1000 if (msg) 1001 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 1002 return 0; 1003 } 1004 1005 /* 1006 * Get controller status information. 1007 */ 1008 int 1009 wtstatus(sc) 1010 struct wt_softc *sc; 1011 { 1012 char *p; 1013 int s; 1014 1015 s = splbio(); 1016 wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 1017 outb(sc->CMDPORT, QIC_RDSTAT); /* send `read status' command */ 1018 1019 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 1020 wtpoll(sc, sc->BUSY, sc->BUSY); /* wait for ready */ 1021 outb(sc->CTLPORT, sc->ONLINE); /* reset request */ 1022 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 1023 1024 p = (char *)&sc->error; 1025 while (p < (char *)&sc->error + 6) { 1026 u_char x = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); 1027 if ((x & sc->NOEXCEP) == 0) { /* error */ 1028 splx(s); 1029 return 0; 1030 } 1031 1032 *p++ = inb(sc->DATAPORT); /* read status byte */ 1033 1034 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 1035 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 1036 outb(sc->CTLPORT, sc->ONLINE); /* unset request */ 1037 } 1038 splx(s); 1039 return 1; 1040 } 1041
Indexes created Fri Sep 26 20:09:58 GMT 2025