1 /* $NetBSD: wt.c,v 1.79 2008/04/08 20:08:50 cegger 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 1.79 2008/04/08 20:08:50 cegger 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 <sys/intr.h> 71 #include <sys/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 callout_t 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, struct cfdata *match, 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, 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, 0); 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 aprint_error_dev(self, "lost controller\n"); 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 aprint_error_dev(&sc->sc_dev, "max DMA size %lu is less than required %d\n", 311 (u_long)maxsize, MAXPHYS); 312 return; 313 } 314 315 if (isa_drq_alloc(sc->sc_ic, sc->chan) != 0) { 316 aprint_error_dev(&sc->sc_dev, "can't reserve drq %d\n", 317 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 aprint_error_dev(&sc->sc_dev, "can't set up ISA DMA map\n"); 324 return; 325 } 326 327 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 328 IST_EDGE, IPL_BIO, wtintr, sc); 329 } 330 331 static int 332 wtdump(dev_t dev, daddr_t blkno, void *va, 333 size_t size) 334 { 335 336 /* Not implemented. */ 337 return ENXIO; 338 } 339 340 static int 341 wtsize(dev_t dev) 342 { 343 344 /* Not implemented. */ 345 return -1; 346 } 347 348 /* 349 * Open routine, called on every device open. 350 */ 351 static int 352 wtopen(dev_t dev, int flag, int mode, struct lwp *l) 353 { 354 int unit = minor(dev) & T_UNIT; 355 struct wt_softc *sc; 356 int error; 357 358 sc = device_lookup(&wt_cd, unit); 359 if (sc == NULL) 360 return (ENXIO); 361 362 /* Check that device is not in use */ 363 if (sc->flags & TPINUSE) 364 return EBUSY; 365 366 /* If the tape is in rewound state, check the status and set density. */ 367 if (sc->flags & TPSTART) { 368 /* If rewind is going on, wait */ 369 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 370 return error; 371 372 /* Check the controller status */ 373 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 374 /* Bad status, reset the controller. */ 375 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 376 return EIO; 377 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 378 return EIO; 379 } 380 381 /* Set up tape density. */ 382 if (sc->dens != (minor(dev) & WT_DENSEL)) { 383 int d = 0; 384 385 switch (minor(dev) & WT_DENSEL) { 386 case WT_DENSDFLT: 387 default: 388 break; /* default density */ 389 case WT_QIC11: 390 d = QIC_FMT11; break; /* minor 010 */ 391 case WT_QIC24: 392 d = QIC_FMT24; break; /* minor 020 */ 393 case WT_QIC120: 394 d = QIC_FMT120; break; /* minor 030 */ 395 case WT_QIC150: 396 d = QIC_FMT150; break; /* minor 040 */ 397 case WT_QIC300: 398 d = QIC_FMT300; break; /* minor 050 */ 399 case WT_QIC600: 400 d = QIC_FMT600; break; /* minor 060 */ 401 } 402 if (d) { 403 /* Change tape density. */ 404 if (!wtcmd(sc, d)) 405 return EIO; 406 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 407 return EIO; 408 409 /* Check the status of the controller. */ 410 if (sc->error & TP_ILL) { 411 aprint_error_dev(&sc->sc_dev, "invalid tape density\n"); 412 return ENODEV; 413 } 414 } 415 sc->dens = minor(dev) & WT_DENSEL; 416 } 417 sc->flags &= ~TPSTART; 418 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 419 return ENXIO; 420 421 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 422 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 423 424 sc->flags = TPINUSE; 425 if (flag & FREAD) 426 sc->flags |= TPREAD; 427 if (flag & FWRITE) 428 sc->flags |= TPWRITE; 429 return 0; 430 } 431 432 /* 433 * Close routine, called on last device close. 434 */ 435 static int 436 wtclose(dev_t dev, int flags, int mode, 437 struct lwp *l) 438 { 439 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 440 441 /* If rewind is pending, do nothing */ 442 if (sc->flags & TPREW) 443 goto done; 444 445 /* If seek forward is pending and no rewind on close, do nothing */ 446 if (sc->flags & TPRMARK) { 447 if (minor(dev) & T_NOREWIND) 448 goto done; 449 450 /* If read file mark is going on, wait */ 451 wtwait(sc, 0, "wtrfm"); 452 } 453 454 if (sc->flags & TPWANY) { 455 /* Tape was written. Write file mark. */ 456 wtwritefm(sc); 457 } 458 459 if ((minor(dev) & T_NOREWIND) == 0) { 460 /* Rewind to beginning of tape. */ 461 /* Don't wait until rewind, though. */ 462 wtrewind(sc); 463 goto done; 464 } 465 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 466 /* Space forward to after next file mark if no writing done. */ 467 /* Don't wait for completion. */ 468 wtreadfm(sc); 469 } 470 471 done: 472 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 473 free(sc->buf, M_TEMP); 474 return 0; 475 } 476 477 /* 478 * Ioctl routine. Compatible with BSD ioctls. 479 * Direct QIC-02 commands ERASE and RETENSION added. 480 * There are three possible ioctls: 481 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 482 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 483 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 484 */ 485 static int 486 wtioctl(dev_t dev, unsigned long cmd, void *addr, int flag, 487 struct lwp *l) 488 { 489 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 490 int error, count, op; 491 492 switch (cmd) { 493 default: 494 return EINVAL; 495 case WTQICMD: /* direct QIC command */ 496 op = *(int *)addr; 497 switch (op) { 498 default: 499 return EINVAL; 500 case QIC_ERASE: /* erase the whole tape */ 501 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 502 return EACCES; 503 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 504 return error; 505 break; 506 case QIC_RETENS: /* retension the tape */ 507 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 508 return error; 509 break; 510 } 511 /* Both ERASE and RETENS operations work like REWIND. */ 512 /* Simulate the rewind operation here. */ 513 sc->flags &= ~(TPRO | TPWO | TPVOL); 514 if (!wtcmd(sc, op)) 515 return EIO; 516 sc->flags |= TPSTART | TPREW; 517 if (op == QIC_ERASE) 518 sc->flags |= TPWANY; 519 wtclock(sc); 520 return 0; 521 case MTIOCIEOT: /* ignore EOT errors */ 522 case MTIOCEEOT: /* enable EOT errors */ 523 return 0; 524 case MTIOCGET: 525 ((struct mtget*)addr)->mt_type = 526 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 527 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 528 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 529 ((struct mtget*)addr)->mt_resid = 0; 530 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 531 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 532 return 0; 533 case MTIOCTOP: 534 break; 535 } 536 537 switch ((short)((struct mtop*)addr)->mt_op) { 538 default: 539 #if 0 540 case MTFSR: /* forward space record */ 541 case MTBSR: /* backward space record */ 542 case MTBSF: /* backward space file */ 543 #endif 544 return EINVAL; 545 case MTNOP: /* no operation, sets status only */ 546 case MTCACHE: /* enable controller cache */ 547 case MTNOCACHE: /* disable controller cache */ 548 return 0; 549 case MTREW: /* rewind */ 550 case MTOFFL: /* rewind and put the drive offline */ 551 if (sc->flags & TPREW) /* rewind is running */ 552 return 0; 553 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 554 return error; 555 wtrewind(sc); 556 return 0; 557 case MTFSF: /* forward space file */ 558 for (count = ((struct mtop*)addr)->mt_count; count > 0; 559 --count) { 560 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 561 return error; 562 if ((error = wtreadfm(sc)) != 0) 563 return error; 564 } 565 return 0; 566 case MTWEOF: /* write an end-of-file record */ 567 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 568 return EACCES; 569 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 570 return error; 571 if ((error = wtwritefm(sc)) != 0) 572 return error; 573 return 0; 574 } 575 576 #ifdef DIAGNOSTIC 577 panic("wtioctl: impossible"); 578 #endif 579 } 580 581 /* 582 * Strategy routine. 583 */ 584 static void 585 wtstrategy(struct buf *bp) 586 { 587 struct wt_softc *sc = device_lookup(&wt_cd, minor(bp->b_dev) & T_UNIT); 588 int s; 589 590 bp->b_resid = bp->b_bcount; 591 592 /* at file marks and end of tape, we just return '0 bytes available' */ 593 if (sc->flags & TPVOL) 594 goto xit; 595 596 if (bp->b_flags & B_READ) { 597 /* Check read access and no previous write to this tape. */ 598 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 599 goto errxit; 600 601 /* For now, we assume that all data will be copied out */ 602 /* If read command outstanding, just skip down */ 603 if ((sc->flags & TPRO) == 0) { 604 if (!wtsense(sc, 1, TP_WRP)) { 605 /* Clear status. */ 606 goto errxit; 607 } 608 if (!wtcmd(sc, QIC_RDDATA)) { 609 /* Set read mode. */ 610 wtsense(sc, 1, TP_WRP); 611 goto errxit; 612 } 613 sc->flags |= TPRO | TPRANY; 614 } 615 } else { 616 /* Check write access and write protection. */ 617 /* No previous read from this tape allowed. */ 618 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 619 goto errxit; 620 621 /* If write command outstanding, just skip down */ 622 if ((sc->flags & TPWO) == 0) { 623 if (!wtsense(sc, 1, 0)) { 624 /* Clear status. */ 625 goto errxit; 626 } 627 if (!wtcmd(sc, QIC_WRTDATA)) { 628 /* Set write mode. */ 629 wtsense(sc, 1, 0); 630 goto errxit; 631 } 632 sc->flags |= TPWO | TPWANY; 633 } 634 } 635 636 if (bp->b_bcount == 0) 637 goto xit; 638 639 sc->flags &= ~TPEXCEP; 640 s = splbio(); 641 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 642 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 643 bp->b_resid -= sc->dmacount; 644 } 645 splx(s); 646 647 if (sc->flags & TPEXCEP) { 648 errxit: 649 bp->b_error = EIO; 650 } 651 xit: 652 biodone(bp); 653 return; 654 } 655 656 static int 657 wtread(dev_t dev, struct uio *uio, int flags) 658 { 659 660 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 661 } 662 663 static int 664 wtwrite(dev_t dev, struct uio *uio, int flags) 665 { 666 667 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 668 } 669 670 /* 671 * Interrupt routine. 672 */ 673 static int 674 wtintr(void *arg) 675 { 676 struct wt_softc *sc = arg; 677 u_char x; 678 679 /* get status */ 680 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 681 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 682 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 683 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 684 WTDBPRINT(("busy\n")); 685 return 0; /* device is busy */ 686 } 687 688 /* 689 * Check if rewind finished. 690 */ 691 if (sc->flags & TPREW) { 692 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 693 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 694 "rewind busy?\n" : "rewind finished\n")); 695 sc->flags &= ~TPREW; /* rewind finished */ 696 wtsense(sc, 1, TP_WRP); 697 wakeup((void *)sc); 698 return 1; 699 } 700 701 /* 702 * Check if writing/reading of file mark finished. 703 */ 704 if (sc->flags & (TPRMARK | TPWMARK)) { 705 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 706 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 707 "marker r/w busy?\n" : "marker r/w finished\n")); 708 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 709 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 710 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 711 wakeup((void *)sc); 712 return 1; 713 } 714 715 /* 716 * Do we started any i/o? If no, just return. 717 */ 718 if ((sc->flags & TPACTIVE) == 0) { 719 WTDBPRINT(("unexpected interrupt\n")); 720 return 0; 721 } 722 sc->flags &= ~TPACTIVE; 723 sc->dmacount += sc->bsize; /* increment counter */ 724 725 /* 726 * Clean up DMA. 727 */ 728 if ((sc->dmaflags & DMAMODE_READ) && 729 (sc->dmatotal - sc->dmacount) < sc->bsize) { 730 /* If reading short block, copy the internal buffer 731 * to the user memory. */ 732 isa_dmadone(sc->sc_ic, sc->chan); 733 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 734 } else 735 isa_dmadone(sc->sc_ic, sc->chan); 736 737 /* 738 * On exception, check for end of file and end of volume. 739 */ 740 if ((x & sc->regs.NOEXCEP) == 0) { 741 WTDBPRINT(("i/o exception\n")); 742 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 743 if (sc->error & (TP_EOM | TP_FIL)) 744 sc->flags |= TPVOL; /* end of file */ 745 else 746 sc->flags |= TPEXCEP; /* i/o error */ 747 wakeup((void *)sc); 748 return 1; 749 } 750 751 if (sc->dmacount < sc->dmatotal) { 752 /* Continue I/O. */ 753 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 754 wtdma(sc); 755 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 756 return 1; 757 } 758 if (sc->dmacount > sc->dmatotal) /* short last block */ 759 sc->dmacount = sc->dmatotal; 760 /* Wake up user level. */ 761 wakeup((void *)sc); 762 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 763 return 1; 764 } 765 766 /* start the rewind operation */ 767 static void 768 wtrewind(struct wt_softc *sc) 769 { 770 int rwmode = sc->flags & (TPRO | TPWO); 771 772 sc->flags &= ~(TPRO | TPWO | TPVOL); 773 /* 774 * Wangtek strictly follows QIC-02 standard: 775 * clearing ONLINE in read/write modes causes rewind. 776 * REWIND command is not allowed in read/write mode 777 * and gives `illegal command' error. 778 */ 779 if (sc->type == WANGTEK && rwmode) { 780 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 781 } else if (!wtcmd(sc, QIC_REWIND)) 782 return; 783 sc->flags |= TPSTART | TPREW; 784 wtclock(sc); 785 } 786 787 /* 788 * Start the `read marker' operation. 789 */ 790 static int 791 wtreadfm(struct wt_softc *sc) 792 { 793 794 sc->flags &= ~(TPRO | TPWO | TPVOL); 795 if (!wtcmd(sc, QIC_READFM)) { 796 wtsense(sc, 1, TP_WRP); 797 return EIO; 798 } 799 sc->flags |= TPRMARK | TPRANY; 800 wtclock(sc); 801 /* Don't wait for completion here. */ 802 return 0; 803 } 804 805 /* 806 * Write marker to the tape. 807 */ 808 static int 809 wtwritefm(struct wt_softc *sc) 810 { 811 812 tsleep((void *)wtwritefm, WTPRI, "wtwfm", hz); 813 sc->flags &= ~(TPRO | TPWO); 814 if (!wtcmd(sc, QIC_WRITEFM)) { 815 wtsense(sc, 1, 0); 816 return EIO; 817 } 818 sc->flags |= TPWMARK | TPWANY; 819 wtclock(sc); 820 return wtwait(sc, 0, "wtwfm"); 821 } 822 823 /* 824 * While controller status & mask == bits continue waiting. 825 */ 826 static u_char 827 wtsoft(struct wt_softc *sc, int mask, int bits) 828 { 829 bus_space_tag_t iot = sc->sc_iot; 830 bus_space_handle_t ioh = sc->sc_ioh; 831 u_char x; 832 int i; 833 834 835 /* Poll status port, waiting for specified bits. */ 836 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 837 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 838 if ((x & mask) != bits) 839 return x; 840 delay(1); 841 } 842 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 843 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 844 if ((x & mask) != bits) 845 return x; 846 delay(100); 847 } 848 for (;;) { /* forever */ 849 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 850 if ((x & mask) != bits) 851 return x; 852 tsleep((void *)wtsoft, WTPRI, "wtsoft", 1); 853 } 854 } 855 856 /* 857 * Execute QIC command. 858 */ 859 static int 860 wtcmd(struct wt_softc *sc, int cmd) 861 { 862 bus_space_tag_t iot = sc->sc_iot; 863 bus_space_handle_t ioh = sc->sc_ioh; 864 u_char x; 865 int s; 866 867 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 868 s = splbio(); 869 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 870 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 871 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 872 splx(s); 873 return 0; 874 } 875 876 /* output the command */ 877 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 878 879 /* set request */ 880 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 881 sc->regs.REQUEST | sc->regs.ONLINE); 882 883 /* wait for ready */ 884 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 885 886 /* reset request */ 887 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 888 sc->regs.IEN | sc->regs.ONLINE); 889 890 /* wait for not ready */ 891 wtsoft(sc, sc->regs.BUSY, 0); 892 splx(s); 893 return 1; 894 } 895 896 /* wait for the end of i/o, seeking marker or rewind operation */ 897 static int 898 wtwait(struct wt_softc *sc, int catch, const char *msg) 899 { 900 int error; 901 902 WTDBPRINT(("wtwait() `%s'\n", msg)); 903 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 904 if ((error = tsleep((void *)sc, WTPRI | catch, msg, 0)) != 0) 905 return error; 906 return 0; 907 } 908 909 /* initialize DMA for the i/o operation */ 910 static void 911 wtdma(struct wt_softc *sc) 912 { 913 bus_space_tag_t iot = sc->sc_iot; 914 bus_space_handle_t ioh = sc->sc_ioh; 915 916 sc->flags |= TPACTIVE; 917 wtclock(sc); 918 919 if (sc->type == ARCHIVE) { 920 /* Set DMA. */ 921 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 922 } 923 924 if ((sc->dmaflags & DMAMODE_READ) && 925 (sc->dmatotal - sc->dmacount) < sc->bsize) { 926 /* Reading short block; do it through the internal buffer. */ 927 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 928 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 929 } else 930 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 931 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 932 } 933 934 /* start i/o operation */ 935 static int 936 wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len) 937 { 938 u_char x; 939 940 WTDBPRINT(("wtstart()\n")); 941 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 942 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 943 if ((x & sc->regs.NOEXCEP) == 0) { 944 sc->flags |= TPEXCEP; /* error */ 945 return 0; 946 } 947 sc->flags &= ~TPEXCEP; /* clear exception flag */ 948 sc->dmavaddr = vaddr; 949 sc->dmatotal = len; 950 sc->dmacount = 0; 951 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 952 wtdma(sc); 953 return 1; 954 } 955 956 /* 957 * Start timer. 958 */ 959 static void 960 wtclock(struct wt_softc *sc) 961 { 962 963 if (sc->flags & TPTIMER) 964 return; 965 sc->flags |= TPTIMER; 966 /* 967 * Some controllers seem to lose DMA interrupts too often. To make the 968 * tape stream we need 1 tick timeout. 969 */ 970 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 971 wttimer, sc); 972 } 973 974 /* 975 * Simulate an interrupt periodically while i/o is going. 976 * This is necessary in case interrupts get eaten due to 977 * multiple devices on a single IRQ line. 978 */ 979 static void 980 wttimer(void *arg) 981 { 982 register struct wt_softc *sc = (struct wt_softc *)arg; 983 int s; 984 u_char status; 985 986 sc->flags &= ~TPTIMER; 987 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 988 return; 989 990 /* If i/o going, simulate interrupt. */ 991 s = splbio(); 992 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 993 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 994 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 995 WTDBPRINT(("wttimer() -- ")); 996 wtintr(sc); 997 } 998 splx(s); 999 1000 /* Restart timer if i/o pending. */ 1001 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1002 wtclock(sc); 1003 } 1004 1005 /* 1006 * Perform QIC-02 and QIC-36 compatible reset sequence. 1007 */ 1008 static int 1009 wtreset(bus_space_tag_t iot, bus_space_handle_t ioh, struct wtregs *regs) 1010 { 1011 u_char x; 1012 int i; 1013 1014 /* send reset */ 1015 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1016 delay(30); 1017 /* turn off reset */ 1018 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1019 delay(30); 1020 1021 /* Read the controller status. */ 1022 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1023 if (x == 0xff) /* no port at this address? */ 1024 return 0; 1025 1026 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1027 for (i = 0; i < 3000; ++i) { 1028 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1029 break; 1030 delay(1000); 1031 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1032 } 1033 return (x & regs->RESETMASK) == regs->RESETVAL; 1034 } 1035 1036 /* 1037 * Get controller status information. Return 0 if user i/o request should 1038 * receive an i/o error code. 1039 */ 1040 static int 1041 wtsense(struct wt_softc *sc, int verbose, int ignore) 1042 { 1043 const char *msg = 0; 1044 int error; 1045 1046 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1047 sc->flags &= ~(TPRO | TPWO); 1048 if (!wtstatus(sc)) 1049 return 0; 1050 if ((sc->error & TP_ST0) == 0) 1051 sc->error &= ~TP_ST0MASK; 1052 if ((sc->error & TP_ST1) == 0) 1053 sc->error &= ~TP_ST1MASK; 1054 sc->error &= ~ignore; /* ignore certain errors */ 1055 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1056 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1057 if (!error) 1058 return 1; 1059 if (!verbose) 1060 return 0; 1061 1062 /* lifted from tdriver.c from Wangtek */ 1063 if (error & TP_USL) 1064 msg = "Drive not online"; 1065 else if (error & TP_CNI) 1066 msg = "No cartridge"; 1067 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1068 msg = "Tape is write protected"; 1069 sc->flags |= TPWP; 1070 } else if (error & TP_FIL) 1071 msg = 0 /*"Filemark detected"*/; 1072 else if (error & TP_EOM) 1073 msg = 0 /*"End of tape"*/; 1074 else if (error & TP_BNL) 1075 msg = "Block not located"; 1076 else if (error & TP_UDA) 1077 msg = "Unrecoverable data error"; 1078 else if (error & TP_NDT) 1079 msg = "No data detected"; 1080 else if (error & TP_ILL) 1081 msg = "Illegal command"; 1082 if (msg) 1083 printf("%s: %s\n", device_xname(&sc->sc_dev), msg); 1084 return 0; 1085 } 1086 1087 /* 1088 * Get controller status information. 1089 */ 1090 static int 1091 wtstatus(struct wt_softc *sc) 1092 { 1093 bus_space_tag_t iot = sc->sc_iot; 1094 bus_space_handle_t ioh = sc->sc_ioh; 1095 char *p; 1096 int s; 1097 1098 s = splbio(); 1099 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1100 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1101 /* send `read status' command */ 1102 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1103 1104 /* set request */ 1105 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1106 sc->regs.REQUEST | sc->regs.ONLINE); 1107 1108 /* wait for ready */ 1109 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1110 /* reset request */ 1111 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1112 1113 /* wait for not ready */ 1114 wtsoft(sc, sc->regs.BUSY, 0); 1115 1116 p = (char *)&sc->error; 1117 while (p < (char *)&sc->error + 6) { 1118 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1119 sc->regs.BUSY | sc->regs.NOEXCEP); 1120 1121 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1122 splx(s); 1123 return 0; 1124 } 1125 1126 /* read status byte */ 1127 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1128 1129 /* set request */ 1130 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1131 sc->regs.REQUEST | sc->regs.ONLINE); 1132 1133 /* wait for not ready */ 1134 wtsoft(sc, sc->regs.BUSY, 0); 1135 1136 /* unset request */ 1137 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1138 } 1139 splx(s); 1140 return 1; 1141 } 1142