1 /* $NetBSD: wt.c,v 1.72 2006/04/26 17:21:30 rpaulo 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 1.72 2006/04/26 17:21:30 rpaulo 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, struct cfdata *match, void *aux) 197 { 198 struct isa_attach_args *ia = aux; 199 bus_space_tag_t iot = ia->ia_iot; 200 bus_space_handle_t ioh; 201 int rv = 0, iosize; 202 203 if (ia->ia_nio < 1) 204 return (0); 205 if (ia->ia_nirq < 1) 206 return (0); 207 if (ia->ia_ndrq < 1) 208 return (0); 209 210 /* Disallow wildcarded i/o address. */ 211 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 212 return (0); 213 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 214 return (0); 215 216 if (ia->ia_drq[0].ir_drq < 1 || ia->ia_drq[0].ir_drq > 3) { 217 printf("wtprobe: Bad drq=%d, should be 1..3\n", 218 ia->ia_drq[0].ir_drq); 219 return (0); 220 } 221 222 iosize = AV_NPORT; 223 224 /* Map i/o space */ 225 if (bus_space_map(iot, ia->ia_io[0].ir_addr, iosize, 0, &ioh)) 226 return 0; 227 228 /* Try Wangtek. */ 229 if (wtreset(iot, ioh, &wtregs)) { 230 iosize = WT_NPORT; /* XXX misleading */ 231 rv = 1; 232 goto done; 233 } 234 235 /* Try Archive. */ 236 if (wtreset(iot, ioh, &avregs)) { 237 iosize = AV_NPORT; 238 rv = 1; 239 goto done; 240 } 241 242 done: 243 if (rv) { 244 ia->ia_nio = 1; 245 ia->ia_io[0].ir_size = iosize; 246 247 ia->ia_nirq = 1; 248 ia->ia_ndrq = 1; 249 250 ia->ia_niomem = 0; 251 } 252 bus_space_unmap(iot, ioh, AV_NPORT); 253 return rv; 254 } 255 256 /* 257 * Device is found, configure it. 258 */ 259 void 260 wtattach(struct device *parent, struct device *self, void *aux) 261 { 262 struct wt_softc *sc = (void *)self; 263 struct isa_attach_args *ia = aux; 264 bus_space_tag_t iot = ia->ia_iot; 265 bus_space_handle_t ioh; 266 bus_size_t maxsize; 267 268 /* Map i/o space */ 269 if (bus_space_map(iot, ia->ia_io[0].ir_addr, AV_NPORT, 0, &ioh)) { 270 printf(": can't map i/o space\n"); 271 return; 272 } 273 274 sc->sc_iot = iot; 275 sc->sc_ioh = ioh; 276 sc->sc_ic = ia->ia_ic; 277 278 callout_init(&sc->sc_timer_ch); 279 280 /* Try Wangtek. */ 281 if (wtreset(iot, ioh, &wtregs)) { 282 sc->type = WANGTEK; 283 memcpy(&sc->regs, &wtregs, sizeof(sc->regs)); 284 printf(": type <Wangtek>\n"); 285 goto ok; 286 } 287 288 /* Try Archive. */ 289 if (wtreset(iot, ioh, &avregs)) { 290 sc->type = ARCHIVE; 291 memcpy(&sc->regs, &avregs, sizeof(sc->regs)); 292 printf(": type <Archive>\n"); 293 /* Reset DMA. */ 294 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 295 goto ok; 296 } 297 298 /* what happened? */ 299 printf("%s: lost controller\n", self->dv_xname); 300 return; 301 302 ok: 303 sc->flags = TPSTART; /* tape is rewound */ 304 sc->dens = -1; /* unknown density */ 305 306 sc->chan = ia->ia_drq[0].ir_drq; 307 308 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->chan)) < MAXPHYS) { 309 printf("%s: max DMA size %lu is less than required %d\n", 310 sc->sc_dev.dv_xname, (u_long)maxsize, MAXPHYS); 311 return; 312 } 313 314 if (isa_drq_alloc(sc->sc_ic, sc->chan) != 0) { 315 printf("%s: can't reserve drq %d\n", 316 sc->sc_dev.dv_xname, sc->chan); 317 return; 318 } 319 320 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 321 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 322 printf("%s: can't set up ISA DMA map\n", 323 sc->sc_dev.dv_xname); 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, caddr_t va, size_t size) 333 { 334 335 /* Not implemented. */ 336 return ENXIO; 337 } 338 339 static int 340 wtsize(dev_t dev) 341 { 342 343 /* Not implemented. */ 344 return -1; 345 } 346 347 /* 348 * Open routine, called on every device open. 349 */ 350 static int 351 wtopen(dev_t dev, int flag, int mode, struct lwp *l) 352 { 353 int unit = minor(dev) & T_UNIT; 354 struct wt_softc *sc; 355 int error; 356 357 sc = device_lookup(&wt_cd, unit); 358 if (sc == NULL) 359 return (ENXIO); 360 361 /* Check that device is not in use */ 362 if (sc->flags & TPINUSE) 363 return EBUSY; 364 365 /* If the tape is in rewound state, check the status and set density. */ 366 if (sc->flags & TPSTART) { 367 /* If rewind is going on, wait */ 368 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 369 return error; 370 371 /* Check the controller status */ 372 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 373 /* Bad status, reset the controller. */ 374 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 375 return EIO; 376 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 377 return EIO; 378 } 379 380 /* Set up tape density. */ 381 if (sc->dens != (minor(dev) & WT_DENSEL)) { 382 int d = 0; 383 384 switch (minor(dev) & WT_DENSEL) { 385 case WT_DENSDFLT: 386 default: 387 break; /* default density */ 388 case WT_QIC11: 389 d = QIC_FMT11; break; /* minor 010 */ 390 case WT_QIC24: 391 d = QIC_FMT24; break; /* minor 020 */ 392 case WT_QIC120: 393 d = QIC_FMT120; break; /* minor 030 */ 394 case WT_QIC150: 395 d = QIC_FMT150; break; /* minor 040 */ 396 case WT_QIC300: 397 d = QIC_FMT300; break; /* minor 050 */ 398 case WT_QIC600: 399 d = QIC_FMT600; break; /* minor 060 */ 400 } 401 if (d) { 402 /* Change tape density. */ 403 if (!wtcmd(sc, d)) 404 return EIO; 405 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 406 return EIO; 407 408 /* Check the status of the controller. */ 409 if (sc->error & TP_ILL) { 410 printf("%s: invalid tape density\n", 411 sc->sc_dev.dv_xname); 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, struct lwp *l) 437 { 438 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 439 440 /* If rewind is pending, do nothing */ 441 if (sc->flags & TPREW) 442 goto done; 443 444 /* If seek forward is pending and no rewind on close, do nothing */ 445 if (sc->flags & TPRMARK) { 446 if (minor(dev) & T_NOREWIND) 447 goto done; 448 449 /* If read file mark is going on, wait */ 450 wtwait(sc, 0, "wtrfm"); 451 } 452 453 if (sc->flags & TPWANY) { 454 /* Tape was written. Write file mark. */ 455 wtwritefm(sc); 456 } 457 458 if ((minor(dev) & T_NOREWIND) == 0) { 459 /* Rewind to beginning of tape. */ 460 /* Don't wait until rewind, though. */ 461 wtrewind(sc); 462 goto done; 463 } 464 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 465 /* Space forward to after next file mark if no writing done. */ 466 /* Don't wait for completion. */ 467 wtreadfm(sc); 468 } 469 470 done: 471 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 472 free(sc->buf, M_TEMP); 473 return 0; 474 } 475 476 /* 477 * Ioctl routine. Compatible with BSD ioctls. 478 * Direct QIC-02 commands ERASE and RETENSION added. 479 * There are three possible ioctls: 480 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 481 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 482 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 483 */ 484 static int 485 wtioctl(dev_t dev, unsigned long cmd, caddr_t addr, int flag, struct lwp *l) 486 { 487 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 488 int error, count, op; 489 490 switch (cmd) { 491 default: 492 return EINVAL; 493 case WTQICMD: /* direct QIC command */ 494 op = *(int *)addr; 495 switch (op) { 496 default: 497 return EINVAL; 498 case QIC_ERASE: /* erase the whole tape */ 499 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 500 return EACCES; 501 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 502 return error; 503 break; 504 case QIC_RETENS: /* retension the tape */ 505 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 506 return error; 507 break; 508 } 509 /* Both ERASE and RETENS operations work like REWIND. */ 510 /* Simulate the rewind operation here. */ 511 sc->flags &= ~(TPRO | TPWO | TPVOL); 512 if (!wtcmd(sc, op)) 513 return EIO; 514 sc->flags |= TPSTART | TPREW; 515 if (op == QIC_ERASE) 516 sc->flags |= TPWANY; 517 wtclock(sc); 518 return 0; 519 case MTIOCIEOT: /* ignore EOT errors */ 520 case MTIOCEEOT: /* enable EOT errors */ 521 return 0; 522 case MTIOCGET: 523 ((struct mtget*)addr)->mt_type = 524 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 525 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 526 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 527 ((struct mtget*)addr)->mt_resid = 0; 528 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 529 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 530 return 0; 531 case MTIOCTOP: 532 break; 533 } 534 535 switch ((short)((struct mtop*)addr)->mt_op) { 536 default: 537 #if 0 538 case MTFSR: /* forward space record */ 539 case MTBSR: /* backward space record */ 540 case MTBSF: /* backward space file */ 541 #endif 542 return EINVAL; 543 case MTNOP: /* no operation, sets status only */ 544 case MTCACHE: /* enable controller cache */ 545 case MTNOCACHE: /* disable controller cache */ 546 return 0; 547 case MTREW: /* rewind */ 548 case MTOFFL: /* rewind and put the drive offline */ 549 if (sc->flags & TPREW) /* rewind is running */ 550 return 0; 551 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 552 return error; 553 wtrewind(sc); 554 return 0; 555 case MTFSF: /* forward space file */ 556 for (count = ((struct mtop*)addr)->mt_count; count > 0; 557 --count) { 558 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 559 return error; 560 if ((error = wtreadfm(sc)) != 0) 561 return error; 562 } 563 return 0; 564 case MTWEOF: /* write an end-of-file record */ 565 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 566 return EACCES; 567 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 568 return error; 569 if ((error = wtwritefm(sc)) != 0) 570 return error; 571 return 0; 572 } 573 574 #ifdef DIAGNOSTIC 575 panic("wtioctl: impossible"); 576 #endif 577 } 578 579 /* 580 * Strategy routine. 581 */ 582 static void 583 wtstrategy(struct buf *bp) 584 { 585 struct wt_softc *sc = device_lookup(&wt_cd, minor(bp->b_dev) & T_UNIT); 586 int s; 587 588 bp->b_resid = bp->b_bcount; 589 590 /* at file marks and end of tape, we just return '0 bytes available' */ 591 if (sc->flags & TPVOL) 592 goto xit; 593 594 if (bp->b_flags & B_READ) { 595 /* Check read access and no previous write to this tape. */ 596 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 597 goto errxit; 598 599 /* For now, we assume that all data will be copied out */ 600 /* If read command outstanding, just skip down */ 601 if ((sc->flags & TPRO) == 0) { 602 if (!wtsense(sc, 1, TP_WRP)) { 603 /* Clear status. */ 604 goto errxit; 605 } 606 if (!wtcmd(sc, QIC_RDDATA)) { 607 /* Set read mode. */ 608 wtsense(sc, 1, TP_WRP); 609 goto errxit; 610 } 611 sc->flags |= TPRO | TPRANY; 612 } 613 } else { 614 /* Check write access and write protection. */ 615 /* No previous read from this tape allowed. */ 616 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 617 goto errxit; 618 619 /* If write command outstanding, just skip down */ 620 if ((sc->flags & TPWO) == 0) { 621 if (!wtsense(sc, 1, 0)) { 622 /* Clear status. */ 623 goto errxit; 624 } 625 if (!wtcmd(sc, QIC_WRTDATA)) { 626 /* Set write mode. */ 627 wtsense(sc, 1, 0); 628 goto errxit; 629 } 630 sc->flags |= TPWO | TPWANY; 631 } 632 } 633 634 if (bp->b_bcount == 0) 635 goto xit; 636 637 sc->flags &= ~TPEXCEP; 638 s = splbio(); 639 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 640 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 641 bp->b_resid -= sc->dmacount; 642 } 643 splx(s); 644 645 if (sc->flags & TPEXCEP) { 646 errxit: 647 bp->b_flags |= B_ERROR; 648 bp->b_error = EIO; 649 } 650 xit: 651 biodone(bp); 652 return; 653 } 654 655 static int 656 wtread(dev_t dev, struct uio *uio, int flags) 657 { 658 659 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 660 } 661 662 static int 663 wtwrite(dev_t dev, struct uio *uio, int flags) 664 { 665 666 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 667 } 668 669 /* 670 * Interrupt routine. 671 */ 672 static int 673 wtintr(void *arg) 674 { 675 struct wt_softc *sc = arg; 676 u_char x; 677 678 /* get status */ 679 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 680 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 681 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 682 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 683 WTDBPRINT(("busy\n")); 684 return 0; /* device is busy */ 685 } 686 687 /* 688 * Check if rewind finished. 689 */ 690 if (sc->flags & TPREW) { 691 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 692 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 693 "rewind busy?\n" : "rewind finished\n")); 694 sc->flags &= ~TPREW; /* rewind finished */ 695 wtsense(sc, 1, TP_WRP); 696 wakeup((caddr_t)sc); 697 return 1; 698 } 699 700 /* 701 * Check if writing/reading of file mark finished. 702 */ 703 if (sc->flags & (TPRMARK | TPWMARK)) { 704 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 705 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 706 "marker r/w busy?\n" : "marker r/w finished\n")); 707 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 708 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 709 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 710 wakeup((caddr_t)sc); 711 return 1; 712 } 713 714 /* 715 * Do we started any i/o? If no, just return. 716 */ 717 if ((sc->flags & TPACTIVE) == 0) { 718 WTDBPRINT(("unexpected interrupt\n")); 719 return 0; 720 } 721 sc->flags &= ~TPACTIVE; 722 sc->dmacount += sc->bsize; /* increment counter */ 723 724 /* 725 * Clean up DMA. 726 */ 727 if ((sc->dmaflags & DMAMODE_READ) && 728 (sc->dmatotal - sc->dmacount) < sc->bsize) { 729 /* If reading short block, copy the internal buffer 730 * to the user memory. */ 731 isa_dmadone(sc->sc_ic, sc->chan); 732 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 733 } else 734 isa_dmadone(sc->sc_ic, sc->chan); 735 736 /* 737 * On exception, check for end of file and end of volume. 738 */ 739 if ((x & sc->regs.NOEXCEP) == 0) { 740 WTDBPRINT(("i/o exception\n")); 741 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 742 if (sc->error & (TP_EOM | TP_FIL)) 743 sc->flags |= TPVOL; /* end of file */ 744 else 745 sc->flags |= TPEXCEP; /* i/o error */ 746 wakeup((caddr_t)sc); 747 return 1; 748 } 749 750 if (sc->dmacount < sc->dmatotal) { 751 /* Continue I/O. */ 752 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 753 wtdma(sc); 754 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 755 return 1; 756 } 757 if (sc->dmacount > sc->dmatotal) /* short last block */ 758 sc->dmacount = sc->dmatotal; 759 /* Wake up user level. */ 760 wakeup((caddr_t)sc); 761 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 762 return 1; 763 } 764 765 /* start the rewind operation */ 766 static void 767 wtrewind(struct wt_softc *sc) 768 { 769 int rwmode = sc->flags & (TPRO | TPWO); 770 771 sc->flags &= ~(TPRO | TPWO | TPVOL); 772 /* 773 * Wangtek strictly follows QIC-02 standard: 774 * clearing ONLINE in read/write modes causes rewind. 775 * REWIND command is not allowed in read/write mode 776 * and gives `illegal command' error. 777 */ 778 if (sc->type == WANGTEK && rwmode) { 779 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 780 } else if (!wtcmd(sc, QIC_REWIND)) 781 return; 782 sc->flags |= TPSTART | TPREW; 783 wtclock(sc); 784 } 785 786 /* 787 * Start the `read marker' operation. 788 */ 789 static int 790 wtreadfm(struct wt_softc *sc) 791 { 792 793 sc->flags &= ~(TPRO | TPWO | TPVOL); 794 if (!wtcmd(sc, QIC_READFM)) { 795 wtsense(sc, 1, TP_WRP); 796 return EIO; 797 } 798 sc->flags |= TPRMARK | TPRANY; 799 wtclock(sc); 800 /* Don't wait for completion here. */ 801 return 0; 802 } 803 804 /* 805 * Write marker to the tape. 806 */ 807 static int 808 wtwritefm(struct wt_softc *sc) 809 { 810 811 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 812 sc->flags &= ~(TPRO | TPWO); 813 if (!wtcmd(sc, QIC_WRITEFM)) { 814 wtsense(sc, 1, 0); 815 return EIO; 816 } 817 sc->flags |= TPWMARK | TPWANY; 818 wtclock(sc); 819 return wtwait(sc, 0, "wtwfm"); 820 } 821 822 /* 823 * While controller status & mask == bits continue waiting. 824 */ 825 static u_char 826 wtsoft(struct wt_softc *sc, int mask, int bits) 827 { 828 bus_space_tag_t iot = sc->sc_iot; 829 bus_space_handle_t ioh = sc->sc_ioh; 830 u_char x; 831 int i; 832 833 834 /* Poll status port, waiting for specified bits. */ 835 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 836 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 837 if ((x & mask) != bits) 838 return x; 839 delay(1); 840 } 841 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 842 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 843 if ((x & mask) != bits) 844 return x; 845 delay(100); 846 } 847 for (;;) { /* forever */ 848 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 849 if ((x & mask) != bits) 850 return x; 851 tsleep((caddr_t)wtsoft, WTPRI, "wtsoft", 1); 852 } 853 } 854 855 /* 856 * Execute QIC command. 857 */ 858 static int 859 wtcmd(struct wt_softc *sc, int cmd) 860 { 861 bus_space_tag_t iot = sc->sc_iot; 862 bus_space_handle_t ioh = sc->sc_ioh; 863 u_char x; 864 int s; 865 866 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 867 s = splbio(); 868 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 869 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 870 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 871 splx(s); 872 return 0; 873 } 874 875 /* output the command */ 876 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 877 878 /* set request */ 879 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 880 sc->regs.REQUEST | sc->regs.ONLINE); 881 882 /* wait for ready */ 883 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 884 885 /* reset request */ 886 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 887 sc->regs.IEN | sc->regs.ONLINE); 888 889 /* wait for not ready */ 890 wtsoft(sc, sc->regs.BUSY, 0); 891 splx(s); 892 return 1; 893 } 894 895 /* wait for the end of i/o, seeking marker or rewind operation */ 896 static int 897 wtwait(struct wt_softc *sc, int catch, const char *msg) 898 { 899 int error; 900 901 WTDBPRINT(("wtwait() `%s'\n", msg)); 902 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 903 if ((error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) != 0) 904 return error; 905 return 0; 906 } 907 908 /* initialize DMA for the i/o operation */ 909 static void 910 wtdma(struct wt_softc *sc) 911 { 912 bus_space_tag_t iot = sc->sc_iot; 913 bus_space_handle_t ioh = sc->sc_ioh; 914 915 sc->flags |= TPACTIVE; 916 wtclock(sc); 917 918 if (sc->type == ARCHIVE) { 919 /* Set DMA. */ 920 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 921 } 922 923 if ((sc->dmaflags & DMAMODE_READ) && 924 (sc->dmatotal - sc->dmacount) < sc->bsize) { 925 /* Reading short block; do it through the internal buffer. */ 926 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 927 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 928 } else 929 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 930 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 931 } 932 933 /* start i/o operation */ 934 static int 935 wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len) 936 { 937 u_char x; 938 939 WTDBPRINT(("wtstart()\n")); 940 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 941 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 942 if ((x & sc->regs.NOEXCEP) == 0) { 943 sc->flags |= TPEXCEP; /* error */ 944 return 0; 945 } 946 sc->flags &= ~TPEXCEP; /* clear exception flag */ 947 sc->dmavaddr = vaddr; 948 sc->dmatotal = len; 949 sc->dmacount = 0; 950 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 951 wtdma(sc); 952 return 1; 953 } 954 955 /* 956 * Start timer. 957 */ 958 static void 959 wtclock(struct wt_softc *sc) 960 { 961 962 if (sc->flags & TPTIMER) 963 return; 964 sc->flags |= TPTIMER; 965 /* 966 * Some controllers seem to lose DMA interrupts too often. To make the 967 * tape stream we need 1 tick timeout. 968 */ 969 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 970 wttimer, sc); 971 } 972 973 /* 974 * Simulate an interrupt periodically while i/o is going. 975 * This is necessary in case interrupts get eaten due to 976 * multiple devices on a single IRQ line. 977 */ 978 static void 979 wttimer(void *arg) 980 { 981 register struct wt_softc *sc = (struct wt_softc *)arg; 982 int s; 983 u_char status; 984 985 sc->flags &= ~TPTIMER; 986 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 987 return; 988 989 /* If i/o going, simulate interrupt. */ 990 s = splbio(); 991 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 992 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 993 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 994 WTDBPRINT(("wttimer() -- ")); 995 wtintr(sc); 996 } 997 splx(s); 998 999 /* Restart timer if i/o pending. */ 1000 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1001 wtclock(sc); 1002 } 1003 1004 /* 1005 * Perform QIC-02 and QIC-36 compatible reset sequence. 1006 */ 1007 static int 1008 wtreset(bus_space_tag_t iot, bus_space_handle_t ioh, struct wtregs *regs) 1009 { 1010 u_char x; 1011 int i; 1012 1013 /* send reset */ 1014 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1015 delay(30); 1016 /* turn off reset */ 1017 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1018 delay(30); 1019 1020 /* Read the controller status. */ 1021 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1022 if (x == 0xff) /* no port at this address? */ 1023 return 0; 1024 1025 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1026 for (i = 0; i < 3000; ++i) { 1027 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1028 break; 1029 delay(1000); 1030 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1031 } 1032 return (x & regs->RESETMASK) == regs->RESETVAL; 1033 } 1034 1035 /* 1036 * Get controller status information. Return 0 if user i/o request should 1037 * receive an i/o error code. 1038 */ 1039 static int 1040 wtsense(struct wt_softc *sc, int verbose, int ignore) 1041 { 1042 const char *msg = 0; 1043 int error; 1044 1045 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1046 sc->flags &= ~(TPRO | TPWO); 1047 if (!wtstatus(sc)) 1048 return 0; 1049 if ((sc->error & TP_ST0) == 0) 1050 sc->error &= ~TP_ST0MASK; 1051 if ((sc->error & TP_ST1) == 0) 1052 sc->error &= ~TP_ST1MASK; 1053 sc->error &= ~ignore; /* ignore certain errors */ 1054 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1055 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1056 if (!error) 1057 return 1; 1058 if (!verbose) 1059 return 0; 1060 1061 /* lifted from tdriver.c from Wangtek */ 1062 if (error & TP_USL) 1063 msg = "Drive not online"; 1064 else if (error & TP_CNI) 1065 msg = "No cartridge"; 1066 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1067 msg = "Tape is write protected"; 1068 sc->flags |= TPWP; 1069 } else if (error & TP_FIL) 1070 msg = 0 /*"Filemark detected"*/; 1071 else if (error & TP_EOM) 1072 msg = 0 /*"End of tape"*/; 1073 else if (error & TP_BNL) 1074 msg = "Block not located"; 1075 else if (error & TP_UDA) 1076 msg = "Unrecoverable data error"; 1077 else if (error & TP_NDT) 1078 msg = "No data detected"; 1079 else if (error & TP_ILL) 1080 msg = "Illegal command"; 1081 if (msg) 1082 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 1083 return 0; 1084 } 1085 1086 /* 1087 * Get controller status information. 1088 */ 1089 static int 1090 wtstatus(struct wt_softc *sc) 1091 { 1092 bus_space_tag_t iot = sc->sc_iot; 1093 bus_space_handle_t ioh = sc->sc_ioh; 1094 char *p; 1095 int s; 1096 1097 s = splbio(); 1098 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1099 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1100 /* send `read status' command */ 1101 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1102 1103 /* set request */ 1104 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1105 sc->regs.REQUEST | sc->regs.ONLINE); 1106 1107 /* wait for ready */ 1108 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1109 /* reset request */ 1110 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1111 1112 /* wait for not ready */ 1113 wtsoft(sc, sc->regs.BUSY, 0); 1114 1115 p = (char *)&sc->error; 1116 while (p < (char *)&sc->error + 6) { 1117 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1118 sc->regs.BUSY | sc->regs.NOEXCEP); 1119 1120 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1121 splx(s); 1122 return 0; 1123 } 1124 1125 /* read status byte */ 1126 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1127 1128 /* set request */ 1129 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1130 sc->regs.REQUEST | sc->regs.ONLINE); 1131 1132 /* wait for not ready */ 1133 wtsoft(sc, sc->regs.BUSY, 0); 1134 1135 /* unset request */ 1136 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1137 } 1138 splx(s); 1139 return 1; 1140 } 1141