1 /* $NetBSD: wt.c,v 1.73 2006/10/12 01:31:17 christos 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@kiae.su> 9 * Serge Vakulenko <vak@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@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/cdefs.h> 54 __KERNEL_RCSID(0, "$NetBSD: wt.c,v 1.73 2006/10/12 01:31:17 christos Exp $"); 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/callout.h> 59 #include <sys/kernel.h> 60 #include <sys/buf.h> 61 #include <sys/fcntl.h> 62 #include <sys/malloc.h> 63 #include <sys/ioctl.h> 64 #include <sys/mtio.h> 65 #include <sys/device.h> 66 #include <sys/proc.h> 67 #include <sys/lwp.h> 68 #include <sys/conf.h> 69 70 #include <machine/intr.h> 71 #include <machine/bus.h> 72 #include <machine/pio.h> 73 74 #include <dev/isa/isavar.h> 75 #include <dev/isa/isadmavar.h> 76 #include <dev/isa/wtreg.h> 77 78 /* 79 * Uncomment this to enable internal device tracing. 80 */ 81 #define WTDBPRINT(x) /* printf x */ 82 83 #define WTPRI (PZERO+10) /* sleep priority */ 84 85 #define WT_NPORT 2 /* 2 i/o ports */ 86 #define AV_NPORT 4 /* 4 i/o ports */ 87 88 enum wttype { 89 UNKNOWN = 0, /* unknown type, driver disabled */ 90 ARCHIVE, /* Archive Viper SC499, SC402 etc */ 91 WANGTEK, /* Wangtek */ 92 }; 93 94 static struct wtregs { 95 /* controller ports */ 96 int DATAPORT, /* data, read only */ 97 CMDPORT, /* command, write only */ 98 STATPORT, /* status, read only */ 99 CTLPORT, /* control, write only */ 100 SDMAPORT, /* start DMA */ 101 RDMAPORT; /* reset DMA */ 102 /* status port bits */ 103 u_char BUSY, /* not ready bit define */ 104 NOEXCEP, /* no exception bit define */ 105 RESETMASK, /* to check after reset */ 106 RESETVAL, /* state after reset */ 107 /* control port bits */ 108 ONLINE, /* device selected */ 109 RESET, /* reset command */ 110 REQUEST, /* request command */ 111 IEN; /* enable interrupts */ 112 } wtregs = { 113 1, 1, 0, 0, 0, 0, 114 0x01, 0x02, 0x07, 0x05, 115 0x01, 0x02, 0x04, 0x08 116 }, avregs = { 117 0, 0, 1, 1, 2, 3, 118 0x40, 0x20, 0xf8, 0x50, 119 0, 0x80, 0x40, 0x20 120 }; 121 122 struct wt_softc { 123 struct device sc_dev; 124 void *sc_ih; 125 126 bus_space_tag_t sc_iot; 127 bus_space_handle_t sc_ioh; 128 isa_chipset_tag_t sc_ic; 129 130 struct callout sc_timer_ch; 131 132 enum wttype type; /* type of controller */ 133 int chan; /* DMA channel number, 1..3 */ 134 int flags; /* state of tape drive */ 135 unsigned dens; /* tape density */ 136 int bsize; /* tape block size */ 137 void *buf; /* internal i/o buffer */ 138 139 void *dmavaddr; /* virtual address of DMA i/o buffer */ 140 size_t dmatotal; /* size of i/o buffer */ 141 int dmaflags; /* i/o direction */ 142 size_t dmacount; /* resulting length of DMA i/o */ 143 144 u_short error; /* code for error encountered */ 145 u_short ercnt; /* number of error blocks */ 146 u_short urcnt; /* number of underruns */ 147 148 struct wtregs regs; 149 }; 150 151 static dev_type_open(wtopen); 152 static dev_type_close(wtclose); 153 static dev_type_read(wtread); 154 static dev_type_write(wtwrite); 155 static dev_type_ioctl(wtioctl); 156 static dev_type_strategy(wtstrategy); 157 static dev_type_dump(wtdump); 158 static dev_type_size(wtsize); 159 160 const struct bdevsw wt_bdevsw = { 161 wtopen, wtclose, wtstrategy, wtioctl, wtdump, wtsize, D_TAPE 162 }; 163 164 const struct cdevsw wt_cdevsw = { 165 wtopen, wtclose, wtread, wtwrite, wtioctl, 166 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 167 }; 168 169 static int wtwait(struct wt_softc *sc, int catch, const char *msg); 170 static int wtcmd(struct wt_softc *sc, int cmd); 171 static int wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len); 172 static void wtdma(struct wt_softc *sc); 173 static void wttimer(void *arg); 174 static void wtclock(struct wt_softc *sc); 175 static int wtreset(bus_space_tag_t, bus_space_handle_t, struct wtregs *); 176 static int wtsense(struct wt_softc *sc, int verbose, int ignore); 177 static int wtstatus(struct wt_softc *sc); 178 static void wtrewind(struct wt_softc *sc); 179 static int wtreadfm(struct wt_softc *sc); 180 static int wtwritefm(struct wt_softc *sc); 181 static u_char wtsoft(struct wt_softc *sc, int mask, int bits); 182 static int wtintr(void *sc); 183 184 int wtprobe(struct device *, struct cfdata *, void *); 185 void wtattach(struct device *, struct device *, void *); 186 187 CFATTACH_DECL(wt, sizeof(struct wt_softc), 188 wtprobe, wtattach, NULL, NULL); 189 190 extern struct cfdriver wt_cd; 191 192 /* 193 * Probe for the presence of the device. 194 */ 195 int 196 wtprobe(struct device *parent __unused, struct cfdata *match __unused, 197 void *aux) 198 { 199 struct isa_attach_args *ia = aux; 200 bus_space_tag_t iot = ia->ia_iot; 201 bus_space_handle_t ioh; 202 int rv = 0, iosize; 203 204 if (ia->ia_nio < 1) 205 return (0); 206 if (ia->ia_nirq < 1) 207 return (0); 208 if (ia->ia_ndrq < 1) 209 return (0); 210 211 /* Disallow wildcarded i/o address. */ 212 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 213 return (0); 214 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 215 return (0); 216 217 if (ia->ia_drq[0].ir_drq < 1 || ia->ia_drq[0].ir_drq > 3) { 218 printf("wtprobe: Bad drq=%d, should be 1..3\n", 219 ia->ia_drq[0].ir_drq); 220 return (0); 221 } 222 223 iosize = AV_NPORT; 224 225 /* Map i/o space */ 226 if (bus_space_map(iot, ia->ia_io[0].ir_addr, iosize, 0, &ioh)) 227 return 0; 228 229 /* Try Wangtek. */ 230 if (wtreset(iot, ioh, &wtregs)) { 231 iosize = WT_NPORT; /* XXX misleading */ 232 rv = 1; 233 goto done; 234 } 235 236 /* Try Archive. */ 237 if (wtreset(iot, ioh, &avregs)) { 238 iosize = AV_NPORT; 239 rv = 1; 240 goto done; 241 } 242 243 done: 244 if (rv) { 245 ia->ia_nio = 1; 246 ia->ia_io[0].ir_size = iosize; 247 248 ia->ia_nirq = 1; 249 ia->ia_ndrq = 1; 250 251 ia->ia_niomem = 0; 252 } 253 bus_space_unmap(iot, ioh, AV_NPORT); 254 return rv; 255 } 256 257 /* 258 * Device is found, configure it. 259 */ 260 void 261 wtattach(struct device *parent __unused, struct device *self, void *aux) 262 { 263 struct wt_softc *sc = (void *)self; 264 struct isa_attach_args *ia = aux; 265 bus_space_tag_t iot = ia->ia_iot; 266 bus_space_handle_t ioh; 267 bus_size_t maxsize; 268 269 /* Map i/o space */ 270 if (bus_space_map(iot, ia->ia_io[0].ir_addr, AV_NPORT, 0, &ioh)) { 271 printf(": can't map i/o space\n"); 272 return; 273 } 274 275 sc->sc_iot = iot; 276 sc->sc_ioh = ioh; 277 sc->sc_ic = ia->ia_ic; 278 279 callout_init(&sc->sc_timer_ch); 280 281 /* Try Wangtek. */ 282 if (wtreset(iot, ioh, &wtregs)) { 283 sc->type = WANGTEK; 284 memcpy(&sc->regs, &wtregs, sizeof(sc->regs)); 285 printf(": type <Wangtek>\n"); 286 goto ok; 287 } 288 289 /* Try Archive. */ 290 if (wtreset(iot, ioh, &avregs)) { 291 sc->type = ARCHIVE; 292 memcpy(&sc->regs, &avregs, sizeof(sc->regs)); 293 printf(": type <Archive>\n"); 294 /* Reset DMA. */ 295 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 296 goto ok; 297 } 298 299 /* what happened? */ 300 printf("%s: lost controller\n", self->dv_xname); 301 return; 302 303 ok: 304 sc->flags = TPSTART; /* tape is rewound */ 305 sc->dens = -1; /* unknown density */ 306 307 sc->chan = ia->ia_drq[0].ir_drq; 308 309 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->chan)) < MAXPHYS) { 310 printf("%s: max DMA size %lu is less than required %d\n", 311 sc->sc_dev.dv_xname, (u_long)maxsize, MAXPHYS); 312 return; 313 } 314 315 if (isa_drq_alloc(sc->sc_ic, sc->chan) != 0) { 316 printf("%s: can't reserve drq %d\n", 317 sc->sc_dev.dv_xname, sc->chan); 318 return; 319 } 320 321 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 322 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 323 printf("%s: can't set up ISA DMA map\n", 324 sc->sc_dev.dv_xname); 325 return; 326 } 327 328 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 329 IST_EDGE, IPL_BIO, wtintr, sc); 330 } 331 332 static int 333 wtdump(dev_t dev __unused, daddr_t blkno __unused, caddr_t va __unused, 334 size_t size __unused) 335 { 336 337 /* Not implemented. */ 338 return ENXIO; 339 } 340 341 static int 342 wtsize(dev_t dev __unused) 343 { 344 345 /* Not implemented. */ 346 return -1; 347 } 348 349 /* 350 * Open routine, called on every device open. 351 */ 352 static int 353 wtopen(dev_t dev, int flag, int mode __unused, struct lwp *l __unused) 354 { 355 int unit = minor(dev) & T_UNIT; 356 struct wt_softc *sc; 357 int error; 358 359 sc = device_lookup(&wt_cd, unit); 360 if (sc == NULL) 361 return (ENXIO); 362 363 /* Check that device is not in use */ 364 if (sc->flags & TPINUSE) 365 return EBUSY; 366 367 /* If the tape is in rewound state, check the status and set density. */ 368 if (sc->flags & TPSTART) { 369 /* If rewind is going on, wait */ 370 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 371 return error; 372 373 /* Check the controller status */ 374 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 375 /* Bad status, reset the controller. */ 376 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 377 return EIO; 378 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 379 return EIO; 380 } 381 382 /* Set up tape density. */ 383 if (sc->dens != (minor(dev) & WT_DENSEL)) { 384 int d = 0; 385 386 switch (minor(dev) & WT_DENSEL) { 387 case WT_DENSDFLT: 388 default: 389 break; /* default density */ 390 case WT_QIC11: 391 d = QIC_FMT11; break; /* minor 010 */ 392 case WT_QIC24: 393 d = QIC_FMT24; break; /* minor 020 */ 394 case WT_QIC120: 395 d = QIC_FMT120; break; /* minor 030 */ 396 case WT_QIC150: 397 d = QIC_FMT150; break; /* minor 040 */ 398 case WT_QIC300: 399 d = QIC_FMT300; break; /* minor 050 */ 400 case WT_QIC600: 401 d = QIC_FMT600; break; /* minor 060 */ 402 } 403 if (d) { 404 /* Change tape density. */ 405 if (!wtcmd(sc, d)) 406 return EIO; 407 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 408 return EIO; 409 410 /* Check the status of the controller. */ 411 if (sc->error & TP_ILL) { 412 printf("%s: invalid tape density\n", 413 sc->sc_dev.dv_xname); 414 return ENODEV; 415 } 416 } 417 sc->dens = minor(dev) & WT_DENSEL; 418 } 419 sc->flags &= ~TPSTART; 420 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 421 return ENXIO; 422 423 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 424 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 425 426 sc->flags = TPINUSE; 427 if (flag & FREAD) 428 sc->flags |= TPREAD; 429 if (flag & FWRITE) 430 sc->flags |= TPWRITE; 431 return 0; 432 } 433 434 /* 435 * Close routine, called on last device close. 436 */ 437 static int 438 wtclose(dev_t dev, int flags __unused, int mode __unused, 439 struct lwp *l __unused) 440 { 441 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 442 443 /* If rewind is pending, do nothing */ 444 if (sc->flags & TPREW) 445 goto done; 446 447 /* If seek forward is pending and no rewind on close, do nothing */ 448 if (sc->flags & TPRMARK) { 449 if (minor(dev) & T_NOREWIND) 450 goto done; 451 452 /* If read file mark is going on, wait */ 453 wtwait(sc, 0, "wtrfm"); 454 } 455 456 if (sc->flags & TPWANY) { 457 /* Tape was written. Write file mark. */ 458 wtwritefm(sc); 459 } 460 461 if ((minor(dev) & T_NOREWIND) == 0) { 462 /* Rewind to beginning of tape. */ 463 /* Don't wait until rewind, though. */ 464 wtrewind(sc); 465 goto done; 466 } 467 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 468 /* Space forward to after next file mark if no writing done. */ 469 /* Don't wait for completion. */ 470 wtreadfm(sc); 471 } 472 473 done: 474 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 475 free(sc->buf, M_TEMP); 476 return 0; 477 } 478 479 /* 480 * Ioctl routine. Compatible with BSD ioctls. 481 * Direct QIC-02 commands ERASE and RETENSION added. 482 * There are three possible ioctls: 483 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 484 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 485 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 486 */ 487 static int 488 wtioctl(dev_t dev, unsigned long cmd, caddr_t addr, int flag __unused, 489 struct lwp *l __unused) 490 { 491 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 492 int error, count, op; 493 494 switch (cmd) { 495 default: 496 return EINVAL; 497 case WTQICMD: /* direct QIC command */ 498 op = *(int *)addr; 499 switch (op) { 500 default: 501 return EINVAL; 502 case QIC_ERASE: /* erase the whole tape */ 503 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 504 return EACCES; 505 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 506 return error; 507 break; 508 case QIC_RETENS: /* retension the tape */ 509 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 510 return error; 511 break; 512 } 513 /* Both ERASE and RETENS operations work like REWIND. */ 514 /* Simulate the rewind operation here. */ 515 sc->flags &= ~(TPRO | TPWO | TPVOL); 516 if (!wtcmd(sc, op)) 517 return EIO; 518 sc->flags |= TPSTART | TPREW; 519 if (op == QIC_ERASE) 520 sc->flags |= TPWANY; 521 wtclock(sc); 522 return 0; 523 case MTIOCIEOT: /* ignore EOT errors */ 524 case MTIOCEEOT: /* enable EOT errors */ 525 return 0; 526 case MTIOCGET: 527 ((struct mtget*)addr)->mt_type = 528 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 529 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 530 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 531 ((struct mtget*)addr)->mt_resid = 0; 532 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 533 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 534 return 0; 535 case MTIOCTOP: 536 break; 537 } 538 539 switch ((short)((struct mtop*)addr)->mt_op) { 540 default: 541 #if 0 542 case MTFSR: /* forward space record */ 543 case MTBSR: /* backward space record */ 544 case MTBSF: /* backward space file */ 545 #endif 546 return EINVAL; 547 case MTNOP: /* no operation, sets status only */ 548 case MTCACHE: /* enable controller cache */ 549 case MTNOCACHE: /* disable controller cache */ 550 return 0; 551 case MTREW: /* rewind */ 552 case MTOFFL: /* rewind and put the drive offline */ 553 if (sc->flags & TPREW) /* rewind is running */ 554 return 0; 555 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 556 return error; 557 wtrewind(sc); 558 return 0; 559 case MTFSF: /* forward space file */ 560 for (count = ((struct mtop*)addr)->mt_count; count > 0; 561 --count) { 562 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 563 return error; 564 if ((error = wtreadfm(sc)) != 0) 565 return error; 566 } 567 return 0; 568 case MTWEOF: /* write an end-of-file record */ 569 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 570 return EACCES; 571 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 572 return error; 573 if ((error = wtwritefm(sc)) != 0) 574 return error; 575 return 0; 576 } 577 578 #ifdef DIAGNOSTIC 579 panic("wtioctl: impossible"); 580 #endif 581 } 582 583 /* 584 * Strategy routine. 585 */ 586 static void 587 wtstrategy(struct buf *bp) 588 { 589 struct wt_softc *sc = device_lookup(&wt_cd, minor(bp->b_dev) & T_UNIT); 590 int s; 591 592 bp->b_resid = bp->b_bcount; 593 594 /* at file marks and end of tape, we just return '0 bytes available' */ 595 if (sc->flags & TPVOL) 596 goto xit; 597 598 if (bp->b_flags & B_READ) { 599 /* Check read access and no previous write to this tape. */ 600 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 601 goto errxit; 602 603 /* For now, we assume that all data will be copied out */ 604 /* If read command outstanding, just skip down */ 605 if ((sc->flags & TPRO) == 0) { 606 if (!wtsense(sc, 1, TP_WRP)) { 607 /* Clear status. */ 608 goto errxit; 609 } 610 if (!wtcmd(sc, QIC_RDDATA)) { 611 /* Set read mode. */ 612 wtsense(sc, 1, TP_WRP); 613 goto errxit; 614 } 615 sc->flags |= TPRO | TPRANY; 616 } 617 } else { 618 /* Check write access and write protection. */ 619 /* No previous read from this tape allowed. */ 620 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 621 goto errxit; 622 623 /* If write command outstanding, just skip down */ 624 if ((sc->flags & TPWO) == 0) { 625 if (!wtsense(sc, 1, 0)) { 626 /* Clear status. */ 627 goto errxit; 628 } 629 if (!wtcmd(sc, QIC_WRTDATA)) { 630 /* Set write mode. */ 631 wtsense(sc, 1, 0); 632 goto errxit; 633 } 634 sc->flags |= TPWO | TPWANY; 635 } 636 } 637 638 if (bp->b_bcount == 0) 639 goto xit; 640 641 sc->flags &= ~TPEXCEP; 642 s = splbio(); 643 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 644 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 645 bp->b_resid -= sc->dmacount; 646 } 647 splx(s); 648 649 if (sc->flags & TPEXCEP) { 650 errxit: 651 bp->b_flags |= B_ERROR; 652 bp->b_error = EIO; 653 } 654 xit: 655 biodone(bp); 656 return; 657 } 658 659 static int 660 wtread(dev_t dev, struct uio *uio, int flags __unused) 661 { 662 663 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 664 } 665 666 static int 667 wtwrite(dev_t dev, struct uio *uio, int flags __unused) 668 { 669 670 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 671 } 672 673 /* 674 * Interrupt routine. 675 */ 676 static int 677 wtintr(void *arg) 678 { 679 struct wt_softc *sc = arg; 680 u_char x; 681 682 /* get status */ 683 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 684 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 685 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 686 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 687 WTDBPRINT(("busy\n")); 688 return 0; /* device is busy */ 689 } 690 691 /* 692 * Check if rewind finished. 693 */ 694 if (sc->flags & TPREW) { 695 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 696 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 697 "rewind busy?\n" : "rewind finished\n")); 698 sc->flags &= ~TPREW; /* rewind finished */ 699 wtsense(sc, 1, TP_WRP); 700 wakeup((caddr_t)sc); 701 return 1; 702 } 703 704 /* 705 * Check if writing/reading of file mark finished. 706 */ 707 if (sc->flags & (TPRMARK | TPWMARK)) { 708 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 709 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 710 "marker r/w busy?\n" : "marker r/w finished\n")); 711 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 712 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 713 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 714 wakeup((caddr_t)sc); 715 return 1; 716 } 717 718 /* 719 * Do we started any i/o? If no, just return. 720 */ 721 if ((sc->flags & TPACTIVE) == 0) { 722 WTDBPRINT(("unexpected interrupt\n")); 723 return 0; 724 } 725 sc->flags &= ~TPACTIVE; 726 sc->dmacount += sc->bsize; /* increment counter */ 727 728 /* 729 * Clean up DMA. 730 */ 731 if ((sc->dmaflags & DMAMODE_READ) && 732 (sc->dmatotal - sc->dmacount) < sc->bsize) { 733 /* If reading short block, copy the internal buffer 734 * to the user memory. */ 735 isa_dmadone(sc->sc_ic, sc->chan); 736 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 737 } else 738 isa_dmadone(sc->sc_ic, sc->chan); 739 740 /* 741 * On exception, check for end of file and end of volume. 742 */ 743 if ((x & sc->regs.NOEXCEP) == 0) { 744 WTDBPRINT(("i/o exception\n")); 745 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 746 if (sc->error & (TP_EOM | TP_FIL)) 747 sc->flags |= TPVOL; /* end of file */ 748 else 749 sc->flags |= TPEXCEP; /* i/o error */ 750 wakeup((caddr_t)sc); 751 return 1; 752 } 753 754 if (sc->dmacount < sc->dmatotal) { 755 /* Continue I/O. */ 756 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 757 wtdma(sc); 758 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 759 return 1; 760 } 761 if (sc->dmacount > sc->dmatotal) /* short last block */ 762 sc->dmacount = sc->dmatotal; 763 /* Wake up user level. */ 764 wakeup((caddr_t)sc); 765 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 766 return 1; 767 } 768 769 /* start the rewind operation */ 770 static void 771 wtrewind(struct wt_softc *sc) 772 { 773 int rwmode = sc->flags & (TPRO | TPWO); 774 775 sc->flags &= ~(TPRO | TPWO | TPVOL); 776 /* 777 * Wangtek strictly follows QIC-02 standard: 778 * clearing ONLINE in read/write modes causes rewind. 779 * REWIND command is not allowed in read/write mode 780 * and gives `illegal command' error. 781 */ 782 if (sc->type == WANGTEK && rwmode) { 783 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 784 } else if (!wtcmd(sc, QIC_REWIND)) 785 return; 786 sc->flags |= TPSTART | TPREW; 787 wtclock(sc); 788 } 789 790 /* 791 * Start the `read marker' operation. 792 */ 793 static int 794 wtreadfm(struct wt_softc *sc) 795 { 796 797 sc->flags &= ~(TPRO | TPWO | TPVOL); 798 if (!wtcmd(sc, QIC_READFM)) { 799 wtsense(sc, 1, TP_WRP); 800 return EIO; 801 } 802 sc->flags |= TPRMARK | TPRANY; 803 wtclock(sc); 804 /* Don't wait for completion here. */ 805 return 0; 806 } 807 808 /* 809 * Write marker to the tape. 810 */ 811 static int 812 wtwritefm(struct wt_softc *sc) 813 { 814 815 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 816 sc->flags &= ~(TPRO | TPWO); 817 if (!wtcmd(sc, QIC_WRITEFM)) { 818 wtsense(sc, 1, 0); 819 return EIO; 820 } 821 sc->flags |= TPWMARK | TPWANY; 822 wtclock(sc); 823 return wtwait(sc, 0, "wtwfm"); 824 } 825 826 /* 827 * While controller status & mask == bits continue waiting. 828 */ 829 static u_char 830 wtsoft(struct wt_softc *sc, int mask, int bits) 831 { 832 bus_space_tag_t iot = sc->sc_iot; 833 bus_space_handle_t ioh = sc->sc_ioh; 834 u_char x; 835 int i; 836 837 838 /* Poll status port, waiting for specified bits. */ 839 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 840 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 841 if ((x & mask) != bits) 842 return x; 843 delay(1); 844 } 845 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 846 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 847 if ((x & mask) != bits) 848 return x; 849 delay(100); 850 } 851 for (;;) { /* forever */ 852 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 853 if ((x & mask) != bits) 854 return x; 855 tsleep((caddr_t)wtsoft, WTPRI, "wtsoft", 1); 856 } 857 } 858 859 /* 860 * Execute QIC command. 861 */ 862 static int 863 wtcmd(struct wt_softc *sc, int cmd) 864 { 865 bus_space_tag_t iot = sc->sc_iot; 866 bus_space_handle_t ioh = sc->sc_ioh; 867 u_char x; 868 int s; 869 870 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 871 s = splbio(); 872 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 873 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 874 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 875 splx(s); 876 return 0; 877 } 878 879 /* output the command */ 880 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 881 882 /* set request */ 883 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 884 sc->regs.REQUEST | sc->regs.ONLINE); 885 886 /* wait for ready */ 887 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 888 889 /* reset request */ 890 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 891 sc->regs.IEN | sc->regs.ONLINE); 892 893 /* wait for not ready */ 894 wtsoft(sc, sc->regs.BUSY, 0); 895 splx(s); 896 return 1; 897 } 898 899 /* wait for the end of i/o, seeking marker or rewind operation */ 900 static int 901 wtwait(struct wt_softc *sc, int catch, const char *msg) 902 { 903 int error; 904 905 WTDBPRINT(("wtwait() `%s'\n", msg)); 906 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 907 if ((error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) != 0) 908 return error; 909 return 0; 910 } 911 912 /* initialize DMA for the i/o operation */ 913 static void 914 wtdma(struct wt_softc *sc) 915 { 916 bus_space_tag_t iot = sc->sc_iot; 917 bus_space_handle_t ioh = sc->sc_ioh; 918 919 sc->flags |= TPACTIVE; 920 wtclock(sc); 921 922 if (sc->type == ARCHIVE) { 923 /* Set DMA. */ 924 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 925 } 926 927 if ((sc->dmaflags & DMAMODE_READ) && 928 (sc->dmatotal - sc->dmacount) < sc->bsize) { 929 /* Reading short block; do it through the internal buffer. */ 930 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 931 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 932 } else 933 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 934 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 935 } 936 937 /* start i/o operation */ 938 static int 939 wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len) 940 { 941 u_char x; 942 943 WTDBPRINT(("wtstart()\n")); 944 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 945 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 946 if ((x & sc->regs.NOEXCEP) == 0) { 947 sc->flags |= TPEXCEP; /* error */ 948 return 0; 949 } 950 sc->flags &= ~TPEXCEP; /* clear exception flag */ 951 sc->dmavaddr = vaddr; 952 sc->dmatotal = len; 953 sc->dmacount = 0; 954 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 955 wtdma(sc); 956 return 1; 957 } 958 959 /* 960 * Start timer. 961 */ 962 static void 963 wtclock(struct wt_softc *sc) 964 { 965 966 if (sc->flags & TPTIMER) 967 return; 968 sc->flags |= TPTIMER; 969 /* 970 * Some controllers seem to lose DMA interrupts too often. To make the 971 * tape stream we need 1 tick timeout. 972 */ 973 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 974 wttimer, sc); 975 } 976 977 /* 978 * Simulate an interrupt periodically while i/o is going. 979 * This is necessary in case interrupts get eaten due to 980 * multiple devices on a single IRQ line. 981 */ 982 static void 983 wttimer(void *arg) 984 { 985 register struct wt_softc *sc = (struct wt_softc *)arg; 986 int s; 987 u_char status; 988 989 sc->flags &= ~TPTIMER; 990 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 991 return; 992 993 /* If i/o going, simulate interrupt. */ 994 s = splbio(); 995 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 996 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 997 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 998 WTDBPRINT(("wttimer() -- ")); 999 wtintr(sc); 1000 } 1001 splx(s); 1002 1003 /* Restart timer if i/o pending. */ 1004 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1005 wtclock(sc); 1006 } 1007 1008 /* 1009 * Perform QIC-02 and QIC-36 compatible reset sequence. 1010 */ 1011 static int 1012 wtreset(bus_space_tag_t iot, bus_space_handle_t ioh, struct wtregs *regs) 1013 { 1014 u_char x; 1015 int i; 1016 1017 /* send reset */ 1018 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1019 delay(30); 1020 /* turn off reset */ 1021 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1022 delay(30); 1023 1024 /* Read the controller status. */ 1025 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1026 if (x == 0xff) /* no port at this address? */ 1027 return 0; 1028 1029 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1030 for (i = 0; i < 3000; ++i) { 1031 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1032 break; 1033 delay(1000); 1034 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1035 } 1036 return (x & regs->RESETMASK) == regs->RESETVAL; 1037 } 1038 1039 /* 1040 * Get controller status information. Return 0 if user i/o request should 1041 * receive an i/o error code. 1042 */ 1043 static int 1044 wtsense(struct wt_softc *sc, int verbose, int ignore) 1045 { 1046 const char *msg = 0; 1047 int error; 1048 1049 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1050 sc->flags &= ~(TPRO | TPWO); 1051 if (!wtstatus(sc)) 1052 return 0; 1053 if ((sc->error & TP_ST0) == 0) 1054 sc->error &= ~TP_ST0MASK; 1055 if ((sc->error & TP_ST1) == 0) 1056 sc->error &= ~TP_ST1MASK; 1057 sc->error &= ~ignore; /* ignore certain errors */ 1058 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1059 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1060 if (!error) 1061 return 1; 1062 if (!verbose) 1063 return 0; 1064 1065 /* lifted from tdriver.c from Wangtek */ 1066 if (error & TP_USL) 1067 msg = "Drive not online"; 1068 else if (error & TP_CNI) 1069 msg = "No cartridge"; 1070 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1071 msg = "Tape is write protected"; 1072 sc->flags |= TPWP; 1073 } else if (error & TP_FIL) 1074 msg = 0 /*"Filemark detected"*/; 1075 else if (error & TP_EOM) 1076 msg = 0 /*"End of tape"*/; 1077 else if (error & TP_BNL) 1078 msg = "Block not located"; 1079 else if (error & TP_UDA) 1080 msg = "Unrecoverable data error"; 1081 else if (error & TP_NDT) 1082 msg = "No data detected"; 1083 else if (error & TP_ILL) 1084 msg = "Illegal command"; 1085 if (msg) 1086 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 1087 return 0; 1088 } 1089 1090 /* 1091 * Get controller status information. 1092 */ 1093 static int 1094 wtstatus(struct wt_softc *sc) 1095 { 1096 bus_space_tag_t iot = sc->sc_iot; 1097 bus_space_handle_t ioh = sc->sc_ioh; 1098 char *p; 1099 int s; 1100 1101 s = splbio(); 1102 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1103 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1104 /* send `read status' command */ 1105 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1106 1107 /* set request */ 1108 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1109 sc->regs.REQUEST | sc->regs.ONLINE); 1110 1111 /* wait for ready */ 1112 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1113 /* reset request */ 1114 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1115 1116 /* wait for not ready */ 1117 wtsoft(sc, sc->regs.BUSY, 0); 1118 1119 p = (char *)&sc->error; 1120 while (p < (char *)&sc->error + 6) { 1121 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1122 sc->regs.BUSY | sc->regs.NOEXCEP); 1123 1124 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1125 splx(s); 1126 return 0; 1127 } 1128 1129 /* read status byte */ 1130 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1131 1132 /* set request */ 1133 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1134 sc->regs.REQUEST | sc->regs.ONLINE); 1135 1136 /* wait for not ready */ 1137 wtsoft(sc, sc->regs.BUSY, 0); 1138 1139 /* unset request */ 1140 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1141 } 1142 splx(s); 1143 return 1; 1144 } 1145