wt.c revision 1.24
1 /* $NetBSD: wt.c,v 1.24 1995/04/17 12:09:37 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) 258 dev_t dev; 259 { 260 261 /* Not implemented. */ 262 return EINVAL; 263 } 264 265 int 266 wtsize(dev) 267 dev_t dev; 268 { 269 270 /* Not implemented. */ 271 return -1; 272 } 273 274 /* 275 * Open routine, called on every device open. 276 */ 277 int 278 wtopen(dev, flag) 279 dev_t dev; 280 int flag; 281 { 282 int unit = minor(dev) & T_UNIT; 283 struct wt_softc *sc; 284 int error; 285 286 if (unit >= wtcd.cd_ndevs) 287 return ENXIO; 288 sc = wtcd.cd_devs[unit]; 289 if (!sc) 290 return ENXIO; 291 292 /* Check that device is not in use */ 293 if (sc->flags & TPINUSE) 294 return EBUSY; 295 296 /* If the tape is in rewound state, check the status and set density. */ 297 if (sc->flags & TPSTART) { 298 /* If rewind is going on, wait */ 299 if (error = wtwait(sc, PCATCH, "wtrew")) 300 return error; 301 302 /* Check the controller status */ 303 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 304 /* Bad status, reset the controller. */ 305 if (!wtreset(sc)) 306 return EIO; 307 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 308 return EIO; 309 } 310 311 /* Set up tape density. */ 312 if (sc->dens != (minor(dev) & WT_DENSEL)) { 313 int d = 0; 314 315 switch (minor(dev) & WT_DENSEL) { 316 case WT_DENSDFLT: 317 default: 318 break; /* default density */ 319 case WT_QIC11: 320 d = QIC_FMT11; break; /* minor 010 */ 321 case WT_QIC24: 322 d = QIC_FMT24; break; /* minor 020 */ 323 case WT_QIC120: 324 d = QIC_FMT120; break; /* minor 030 */ 325 case WT_QIC150: 326 d = QIC_FMT150; break; /* minor 040 */ 327 case WT_QIC300: 328 d = QIC_FMT300; break; /* minor 050 */ 329 case WT_QIC600: 330 d = QIC_FMT600; break; /* minor 060 */ 331 } 332 if (d) { 333 /* Change tape density. */ 334 if (!wtcmd(sc, d)) 335 return EIO; 336 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 337 return EIO; 338 339 /* Check the status of the controller. */ 340 if (sc->error & TP_ILL) { 341 printf("%s: invalid tape density\n", 342 sc->sc_dev.dv_xname); 343 return ENODEV; 344 } 345 } 346 sc->dens = minor(dev) & WT_DENSEL; 347 } 348 sc->flags &= ~TPSTART; 349 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 350 return ENXIO; 351 352 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 353 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 354 355 sc->flags = TPINUSE; 356 if (flag & FREAD) 357 sc->flags |= TPREAD; 358 if (flag & FWRITE) 359 sc->flags |= TPWRITE; 360 return 0; 361 } 362 363 /* 364 * Close routine, called on last device close. 365 */ 366 int 367 wtclose(dev) 368 dev_t dev; 369 { 370 int unit = minor(dev) & T_UNIT; 371 struct wt_softc *sc = wtcd.cd_devs[unit]; 372 373 /* If rewind is pending, do nothing */ 374 if (sc->flags & TPREW) 375 goto done; 376 377 /* If seek forward is pending and no rewind on close, do nothing */ 378 if (sc->flags & TPRMARK) { 379 if (minor(dev) & T_NOREWIND) 380 goto done; 381 382 /* If read file mark is going on, wait */ 383 wtwait(sc, 0, "wtrfm"); 384 } 385 386 if (sc->flags & TPWANY) { 387 /* Tape was written. Write file mark. */ 388 wtwritefm(sc); 389 } 390 391 if ((minor(dev) & T_NOREWIND) == 0) { 392 /* Rewind to beginning of tape. */ 393 /* Don't wait until rewind, though. */ 394 wtrewind(sc); 395 goto done; 396 } 397 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 398 /* Space forward to after next file mark if no writing done. */ 399 /* Don't wait for completion. */ 400 wtreadfm(sc); 401 } 402 403 done: 404 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 405 free(sc->buf, M_TEMP); 406 return 0; 407 } 408 409 /* 410 * Ioctl routine. Compatible with BSD ioctls. 411 * Direct QIC-02 commands ERASE and RETENSION added. 412 * There are three possible ioctls: 413 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 414 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 415 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 416 */ 417 int 418 wtioctl(dev, cmd, addr, flag) 419 dev_t dev; 420 u_long cmd; 421 void *addr; 422 int flag; 423 { 424 int unit = minor(dev) & T_UNIT; 425 struct wt_softc *sc = wtcd.cd_devs[unit]; 426 int error, count, op; 427 428 switch (cmd) { 429 default: 430 return EINVAL; 431 case WTQICMD: /* direct QIC command */ 432 op = *(int *)addr; 433 switch (op) { 434 default: 435 return EINVAL; 436 case QIC_ERASE: /* erase the whole tape */ 437 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 438 return EACCES; 439 if (error = wtwait(sc, PCATCH, "wterase")) 440 return error; 441 break; 442 case QIC_RETENS: /* retension the tape */ 443 if (error = wtwait(sc, PCATCH, "wtretens")) 444 return error; 445 break; 446 } 447 /* Both ERASE and RETENS operations work like REWIND. */ 448 /* Simulate the rewind operation here. */ 449 sc->flags &= ~(TPRO | TPWO | TPVOL); 450 if (!wtcmd(sc, op)) 451 return EIO; 452 sc->flags |= TPSTART | TPREW; 453 if (op == QIC_ERASE) 454 sc->flags |= TPWANY; 455 wtclock(sc); 456 return 0; 457 case MTIOCIEOT: /* ignore EOT errors */ 458 case MTIOCEEOT: /* enable EOT errors */ 459 return 0; 460 case MTIOCGET: 461 ((struct mtget*)addr)->mt_type = 462 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 463 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 464 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 465 ((struct mtget*)addr)->mt_resid = 0; 466 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 467 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 468 return 0; 469 case MTIOCTOP: 470 break; 471 } 472 473 switch ((short)((struct mtop*)addr)->mt_op) { 474 default: 475 #if 0 476 case MTFSR: /* forward space record */ 477 case MTBSR: /* backward space record */ 478 case MTBSF: /* backward space file */ 479 #endif 480 return EINVAL; 481 case MTNOP: /* no operation, sets status only */ 482 case MTCACHE: /* enable controller cache */ 483 case MTNOCACHE: /* disable controller cache */ 484 return 0; 485 case MTREW: /* rewind */ 486 case MTOFFL: /* rewind and put the drive offline */ 487 if (sc->flags & TPREW) /* rewind is running */ 488 return 0; 489 if (error = wtwait(sc, PCATCH, "wtorew")) 490 return error; 491 wtrewind(sc); 492 return 0; 493 case MTFSF: /* forward space file */ 494 for (count = ((struct mtop*)addr)->mt_count; count > 0; 495 --count) { 496 if (error = wtwait(sc, PCATCH, "wtorfm")) 497 return error; 498 if (error = wtreadfm(sc)) 499 return error; 500 } 501 return 0; 502 case MTWEOF: /* write an end-of-file record */ 503 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 504 return EACCES; 505 if (error = wtwait(sc, PCATCH, "wtowfm")) 506 return error; 507 if (error = wtwritefm(sc)) 508 return error; 509 return 0; 510 } 511 512 #ifdef DIAGNOSTIC 513 panic("wtioctl: impossible"); 514 #endif 515 } 516 517 /* 518 * Strategy routine. 519 */ 520 void 521 wtstrategy(bp) 522 struct buf *bp; 523 { 524 int unit = minor(bp->b_dev) & T_UNIT; 525 struct wt_softc *sc = wtcd.cd_devs[unit]; 526 int s; 527 528 bp->b_resid = bp->b_bcount; 529 530 /* at file marks and end of tape, we just return '0 bytes available' */ 531 if (sc->flags & TPVOL) 532 goto xit; 533 534 if (bp->b_flags & B_READ) { 535 /* Check read access and no previous write to this tape. */ 536 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 537 goto errxit; 538 539 /* For now, we assume that all data will be copied out */ 540 /* If read command outstanding, just skip down */ 541 if ((sc->flags & TPRO) == 0) { 542 if (!wtsense(sc, 1, TP_WRP)) { 543 /* Clear status. */ 544 goto errxit; 545 } 546 if (!wtcmd(sc, QIC_RDDATA)) { 547 /* Set read mode. */ 548 wtsense(sc, 1, TP_WRP); 549 goto errxit; 550 } 551 sc->flags |= TPRO | TPRANY; 552 } 553 } else { 554 /* Check write access and write protection. */ 555 /* No previous read from this tape allowed. */ 556 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 557 goto errxit; 558 559 /* If write command outstanding, just skip down */ 560 if ((sc->flags & TPWO) == 0) { 561 if (!wtsense(sc, 1, 0)) { 562 /* Clear status. */ 563 goto errxit; 564 } 565 if (!wtcmd(sc, QIC_WRTDATA)) { 566 /* Set write mode. */ 567 wtsense(sc, 1, 0); 568 goto errxit; 569 } 570 sc->flags |= TPWO | TPWANY; 571 } 572 } 573 574 if (bp->b_bcount == 0) 575 goto xit; 576 577 sc->flags &= ~TPEXCEP; 578 s = splbio(); 579 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 580 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 581 bp->b_resid -= sc->dmacount; 582 } 583 splx(s); 584 585 if (sc->flags & TPEXCEP) { 586 errxit: 587 bp->b_flags |= B_ERROR; 588 bp->b_error = EIO; 589 } 590 xit: 591 biodone(bp); 592 return; 593 } 594 595 /* 596 * Interrupt routine. 597 */ 598 int 599 wtintr(arg) 600 void *arg; 601 { 602 struct wt_softc *sc = arg; 603 u_char x; 604 605 x = inb(sc->STATPORT); /* get status */ 606 DEBUG(("wtintr() status=0x%x -- ", x)); 607 if ((x & (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(((x & (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(((x & (sc->BUSY | sc->NOEXCEP)) == (sc->BUSY | sc->NOEXCEP) ? 629 "marker r/w busy?\n" : "marker r/w finished\n")); 630 if ((x & 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 ((x & 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 x; 757 int i; 758 759 /* Poll status port, waiting for specified bits. */ 760 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 761 x = inb(sc->STATPORT); 762 if ((x & mask) != bits) 763 return x; 764 delay(1); 765 } 766 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 767 x = inb(sc->STATPORT); 768 if ((x & mask) != bits) 769 return x; 770 delay(100); 771 } 772 for (;;) { /* forever */ 773 x = inb(sc->STATPORT); 774 if ((x & mask) != bits) 775 return x; 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 x; 789 int s; 790 791 DEBUG(("wtcmd() cmd=0x%x\n", cmd)); 792 s = splbio(); 793 x = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 794 if ((x & sc->NOEXCEP) == 0) { /* error */ 795 splx(s); 796 return 0; 797 } 798 799 outb(sc->CMDPORT, cmd); /* output the command */ 800 801 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 802 wtpoll(sc, sc->BUSY, sc->BUSY); /* wait for ready */ 803 outb(sc->CTLPORT, sc->IEN | sc->ONLINE); /* reset request */ 804 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 805 splx(s); 806 return 1; 807 } 808 809 /* wait for the end of i/o, seeking marker or rewind operation */ 810 int 811 wtwait(sc, catch, msg) 812 struct wt_softc *sc; 813 int catch; 814 char *msg; 815 { 816 int error; 817 818 DEBUG(("wtwait() `%s'\n", msg)); 819 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 820 if (error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) 821 return error; 822 return 0; 823 } 824 825 /* initialize dma for the i/o operation */ 826 void 827 wtdma(sc) 828 struct wt_softc *sc; 829 { 830 831 sc->flags |= TPACTIVE; 832 wtclock(sc); 833 834 if (sc->type == ARCHIVE) { 835 /* Set DMA. */ 836 outb(sc->SDMAPORT, 0); 837 } 838 839 if ((sc->dmaflags & B_READ) && 840 (sc->dmatotal - sc->dmacount) < sc->bsize) { 841 /* Reading short block; do it through the internal buffer. */ 842 isa_dmastart(sc->dmaflags, sc->buf, sc->bsize, sc->chan); 843 } else 844 isa_dmastart(sc->dmaflags, sc->dmavaddr, sc->bsize, sc->chan); 845 } 846 847 /* start i/o operation */ 848 int 849 wtstart(sc, flag, vaddr, len) 850 struct wt_softc *sc; 851 int flag; 852 void *vaddr; 853 size_t len; 854 { 855 u_char x; 856 857 DEBUG(("wtstart()\n")); 858 x = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 859 if ((x & sc->NOEXCEP) == 0) { 860 sc->flags |= TPEXCEP; /* error */ 861 return 0; 862 } 863 sc->flags &= ~TPEXCEP; /* clear exception flag */ 864 sc->dmavaddr = vaddr; 865 sc->dmatotal = len; 866 sc->dmacount = 0; 867 sc->dmaflags = flag; 868 wtdma(sc); 869 return 1; 870 } 871 872 /* 873 * Start timer. 874 */ 875 void 876 wtclock(sc) 877 struct wt_softc *sc; 878 { 879 880 if (sc->flags & TPTIMER) 881 return; 882 sc->flags |= TPTIMER; 883 /* 884 * Some controllers seem to lose dma interrupts too often. To make the 885 * tape stream we need 1 tick timeout. 886 */ 887 timeout(wttimer, sc, (sc->flags & TPACTIVE) ? 1 : hz); 888 } 889 890 /* 891 * Simulate an interrupt periodically while i/o is going. 892 * This is necessary in case interrupts get eaten due to 893 * multiple devices on a single IRQ line. 894 */ 895 void 896 wttimer(arg) 897 void *arg; 898 { 899 struct wt_softc *sc = (struct wt_softc *)arg; 900 int s; 901 902 sc->flags &= ~TPTIMER; 903 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 904 return; 905 906 /* If i/o going, simulate interrupt. */ 907 s = splbio(); 908 if ((inb(sc->STATPORT) & (sc->BUSY | sc->NOEXCEP)) != (sc->BUSY | sc->NOEXCEP)) { 909 DEBUG(("wttimer() -- ")); 910 wtintr(sc); 911 } 912 splx(s); 913 914 /* Restart timer if i/o pending. */ 915 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 916 wtclock(sc); 917 } 918 919 /* 920 * Perform QIC-02 and QIC-36 compatible reset sequence. 921 */ 922 int 923 wtreset(sc) 924 struct wt_softc *sc; 925 { 926 u_char x; 927 int i; 928 929 outb(sc->CTLPORT, sc->RESET | sc->ONLINE); /* send reset */ 930 delay(30); 931 outb(sc->CTLPORT, sc->ONLINE); /* turn off reset */ 932 delay(30); 933 934 /* Read the controller status. */ 935 x = inb(sc->STATPORT); 936 if (x == 0xff) /* no port at this address? */ 937 return 0; 938 939 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 940 for (i = 0; i < 3000; ++i) { 941 if ((x & sc->BUSY) == 0 || (x & sc->NOEXCEP) == 0) 942 break; 943 delay(1000); 944 x = inb(sc->STATPORT); 945 } 946 return (x & sc->RESETMASK) == sc->RESETVAL; 947 } 948 949 /* 950 * Get controller status information. Return 0 if user i/o request should 951 * receive an i/o error code. 952 */ 953 int 954 wtsense(sc, verbose, ignore) 955 struct wt_softc *sc; 956 int verbose, ignore; 957 { 958 char *msg = 0; 959 int error; 960 961 DEBUG(("wtsense() ignore=0x%x\n", ignore)); 962 sc->flags &= ~(TPRO | TPWO); 963 if (!wtstatus(sc)) 964 return 0; 965 if ((sc->error & TP_ST0) == 0) 966 sc->error &= ~TP_ST0MASK; 967 if ((sc->error & TP_ST1) == 0) 968 sc->error &= ~TP_ST1MASK; 969 sc->error &= ~ignore; /* ignore certain errors */ 970 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 971 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 972 if (!error) 973 return 1; 974 if (!verbose) 975 return 0; 976 977 /* lifted from tdriver.c from Wangtek */ 978 if (error & TP_USL) 979 msg = "Drive not online"; 980 else if (error & TP_CNI) 981 msg = "No cartridge"; 982 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 983 msg = "Tape is write protected"; 984 sc->flags |= TPWP; 985 } else if (error & TP_FIL) 986 msg = 0 /*"Filemark detected"*/; 987 else if (error & TP_EOM) 988 msg = 0 /*"End of tape"*/; 989 else if (error & TP_BNL) 990 msg = "Block not located"; 991 else if (error & TP_UDA) 992 msg = "Unrecoverable data error"; 993 else if (error & TP_NDT) 994 msg = "No data detected"; 995 else if (error & TP_ILL) 996 msg = "Illegal command"; 997 if (msg) 998 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 999 return 0; 1000 } 1001 1002 /* 1003 * Get controller status information. 1004 */ 1005 int 1006 wtstatus(sc) 1007 struct wt_softc *sc; 1008 { 1009 char *p; 1010 int s; 1011 1012 s = splbio(); 1013 wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); /* ready? */ 1014 outb(sc->CMDPORT, QIC_RDSTAT); /* send `read status' command */ 1015 1016 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 1017 wtpoll(sc, sc->BUSY, sc->BUSY); /* wait for ready */ 1018 outb(sc->CTLPORT, sc->ONLINE); /* reset request */ 1019 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 1020 1021 p = (char *)&sc->error; 1022 while (p < (char *)&sc->error + 6) { 1023 u_char x = wtpoll(sc, sc->BUSY | sc->NOEXCEP, sc->BUSY | sc->NOEXCEP); 1024 if ((x & sc->NOEXCEP) == 0) { /* error */ 1025 splx(s); 1026 return 0; 1027 } 1028 1029 *p++ = inb(sc->DATAPORT); /* read status byte */ 1030 1031 outb(sc->CTLPORT, sc->REQUEST | sc->ONLINE); /* set request */ 1032 wtpoll(sc, sc->BUSY, 0); /* wait for not ready */ 1033 outb(sc->CTLPORT, sc->ONLINE); /* unset request */ 1034 } 1035 splx(s); 1036 return 1; 1037 } 1038
Indexes created Tue Sep 23 23:09:58 GMT 2025