1 /* $NetBSD: wt.c,v 1.80 2008/06/08 12:43:52 tsutsui 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 1.80 2008/06/08 12:43:52 tsutsui 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_private(&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; 440 441 sc = device_lookup_private(&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, void *addr, int flag, 489 struct lwp *l) 490 { 491 struct wt_softc *sc; 492 int error, count, op; 493 494 sc = device_lookup_private(&wt_cd, minor(dev) & T_UNIT); 495 496 switch (cmd) { 497 default: 498 return EINVAL; 499 case WTQICMD: /* direct QIC command */ 500 op = *(int *)addr; 501 switch (op) { 502 default: 503 return EINVAL; 504 case QIC_ERASE: /* erase the whole tape */ 505 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 506 return EACCES; 507 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 508 return error; 509 break; 510 case QIC_RETENS: /* retension the tape */ 511 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 512 return error; 513 break; 514 } 515 /* Both ERASE and RETENS operations work like REWIND. */ 516 /* Simulate the rewind operation here. */ 517 sc->flags &= ~(TPRO | TPWO | TPVOL); 518 if (!wtcmd(sc, op)) 519 return EIO; 520 sc->flags |= TPSTART | TPREW; 521 if (op == QIC_ERASE) 522 sc->flags |= TPWANY; 523 wtclock(sc); 524 return 0; 525 case MTIOCIEOT: /* ignore EOT errors */ 526 case MTIOCEEOT: /* enable EOT errors */ 527 return 0; 528 case MTIOCGET: 529 ((struct mtget*)addr)->mt_type = 530 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 531 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 532 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 533 ((struct mtget*)addr)->mt_resid = 0; 534 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 535 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 536 return 0; 537 case MTIOCTOP: 538 break; 539 } 540 541 switch ((short)((struct mtop*)addr)->mt_op) { 542 default: 543 #if 0 544 case MTFSR: /* forward space record */ 545 case MTBSR: /* backward space record */ 546 case MTBSF: /* backward space file */ 547 #endif 548 return EINVAL; 549 case MTNOP: /* no operation, sets status only */ 550 case MTCACHE: /* enable controller cache */ 551 case MTNOCACHE: /* disable controller cache */ 552 return 0; 553 case MTREW: /* rewind */ 554 case MTOFFL: /* rewind and put the drive offline */ 555 if (sc->flags & TPREW) /* rewind is running */ 556 return 0; 557 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 558 return error; 559 wtrewind(sc); 560 return 0; 561 case MTFSF: /* forward space file */ 562 for (count = ((struct mtop*)addr)->mt_count; count > 0; 563 --count) { 564 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 565 return error; 566 if ((error = wtreadfm(sc)) != 0) 567 return error; 568 } 569 return 0; 570 case MTWEOF: /* write an end-of-file record */ 571 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 572 return EACCES; 573 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 574 return error; 575 if ((error = wtwritefm(sc)) != 0) 576 return error; 577 return 0; 578 } 579 580 #ifdef DIAGNOSTIC 581 panic("wtioctl: impossible"); 582 #endif 583 } 584 585 /* 586 * Strategy routine. 587 */ 588 static void 589 wtstrategy(struct buf *bp) 590 { 591 struct wt_softc *sc; 592 int s; 593 594 sc = device_lookup_private(&wt_cd, minor(bp->b_dev) & T_UNIT); 595 596 bp->b_resid = bp->b_bcount; 597 598 /* at file marks and end of tape, we just return '0 bytes available' */ 599 if (sc->flags & TPVOL) 600 goto xit; 601 602 if (bp->b_flags & B_READ) { 603 /* Check read access and no previous write to this tape. */ 604 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 605 goto errxit; 606 607 /* For now, we assume that all data will be copied out */ 608 /* If read command outstanding, just skip down */ 609 if ((sc->flags & TPRO) == 0) { 610 if (!wtsense(sc, 1, TP_WRP)) { 611 /* Clear status. */ 612 goto errxit; 613 } 614 if (!wtcmd(sc, QIC_RDDATA)) { 615 /* Set read mode. */ 616 wtsense(sc, 1, TP_WRP); 617 goto errxit; 618 } 619 sc->flags |= TPRO | TPRANY; 620 } 621 } else { 622 /* Check write access and write protection. */ 623 /* No previous read from this tape allowed. */ 624 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 625 goto errxit; 626 627 /* If write command outstanding, just skip down */ 628 if ((sc->flags & TPWO) == 0) { 629 if (!wtsense(sc, 1, 0)) { 630 /* Clear status. */ 631 goto errxit; 632 } 633 if (!wtcmd(sc, QIC_WRTDATA)) { 634 /* Set write mode. */ 635 wtsense(sc, 1, 0); 636 goto errxit; 637 } 638 sc->flags |= TPWO | TPWANY; 639 } 640 } 641 642 if (bp->b_bcount == 0) 643 goto xit; 644 645 sc->flags &= ~TPEXCEP; 646 s = splbio(); 647 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 648 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 649 bp->b_resid -= sc->dmacount; 650 } 651 splx(s); 652 653 if (sc->flags & TPEXCEP) { 654 errxit: 655 bp->b_error = EIO; 656 } 657 xit: 658 biodone(bp); 659 return; 660 } 661 662 static int 663 wtread(dev_t dev, struct uio *uio, int flags) 664 { 665 666 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 667 } 668 669 static int 670 wtwrite(dev_t dev, struct uio *uio, int flags) 671 { 672 673 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 674 } 675 676 /* 677 * Interrupt routine. 678 */ 679 static int 680 wtintr(void *arg) 681 { 682 struct wt_softc *sc = arg; 683 u_char x; 684 685 /* get status */ 686 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 687 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 688 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 689 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 690 WTDBPRINT(("busy\n")); 691 return 0; /* device is busy */ 692 } 693 694 /* 695 * Check if rewind finished. 696 */ 697 if (sc->flags & TPREW) { 698 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 699 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 700 "rewind busy?\n" : "rewind finished\n")); 701 sc->flags &= ~TPREW; /* rewind finished */ 702 wtsense(sc, 1, TP_WRP); 703 wakeup((void *)sc); 704 return 1; 705 } 706 707 /* 708 * Check if writing/reading of file mark finished. 709 */ 710 if (sc->flags & (TPRMARK | TPWMARK)) { 711 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 712 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 713 "marker r/w busy?\n" : "marker r/w finished\n")); 714 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 715 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 716 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 717 wakeup((void *)sc); 718 return 1; 719 } 720 721 /* 722 * Do we started any i/o? If no, just return. 723 */ 724 if ((sc->flags & TPACTIVE) == 0) { 725 WTDBPRINT(("unexpected interrupt\n")); 726 return 0; 727 } 728 sc->flags &= ~TPACTIVE; 729 sc->dmacount += sc->bsize; /* increment counter */ 730 731 /* 732 * Clean up DMA. 733 */ 734 if ((sc->dmaflags & DMAMODE_READ) && 735 (sc->dmatotal - sc->dmacount) < sc->bsize) { 736 /* If reading short block, copy the internal buffer 737 * to the user memory. */ 738 isa_dmadone(sc->sc_ic, sc->chan); 739 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 740 } else 741 isa_dmadone(sc->sc_ic, sc->chan); 742 743 /* 744 * On exception, check for end of file and end of volume. 745 */ 746 if ((x & sc->regs.NOEXCEP) == 0) { 747 WTDBPRINT(("i/o exception\n")); 748 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 749 if (sc->error & (TP_EOM | TP_FIL)) 750 sc->flags |= TPVOL; /* end of file */ 751 else 752 sc->flags |= TPEXCEP; /* i/o error */ 753 wakeup((void *)sc); 754 return 1; 755 } 756 757 if (sc->dmacount < sc->dmatotal) { 758 /* Continue I/O. */ 759 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 760 wtdma(sc); 761 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 762 return 1; 763 } 764 if (sc->dmacount > sc->dmatotal) /* short last block */ 765 sc->dmacount = sc->dmatotal; 766 /* Wake up user level. */ 767 wakeup((void *)sc); 768 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 769 return 1; 770 } 771 772 /* start the rewind operation */ 773 static void 774 wtrewind(struct wt_softc *sc) 775 { 776 int rwmode = sc->flags & (TPRO | TPWO); 777 778 sc->flags &= ~(TPRO | TPWO | TPVOL); 779 /* 780 * Wangtek strictly follows QIC-02 standard: 781 * clearing ONLINE in read/write modes causes rewind. 782 * REWIND command is not allowed in read/write mode 783 * and gives `illegal command' error. 784 */ 785 if (sc->type == WANGTEK && rwmode) { 786 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 787 } else if (!wtcmd(sc, QIC_REWIND)) 788 return; 789 sc->flags |= TPSTART | TPREW; 790 wtclock(sc); 791 } 792 793 /* 794 * Start the `read marker' operation. 795 */ 796 static int 797 wtreadfm(struct wt_softc *sc) 798 { 799 800 sc->flags &= ~(TPRO | TPWO | TPVOL); 801 if (!wtcmd(sc, QIC_READFM)) { 802 wtsense(sc, 1, TP_WRP); 803 return EIO; 804 } 805 sc->flags |= TPRMARK | TPRANY; 806 wtclock(sc); 807 /* Don't wait for completion here. */ 808 return 0; 809 } 810 811 /* 812 * Write marker to the tape. 813 */ 814 static int 815 wtwritefm(struct wt_softc *sc) 816 { 817 818 tsleep((void *)wtwritefm, WTPRI, "wtwfm", hz); 819 sc->flags &= ~(TPRO | TPWO); 820 if (!wtcmd(sc, QIC_WRITEFM)) { 821 wtsense(sc, 1, 0); 822 return EIO; 823 } 824 sc->flags |= TPWMARK | TPWANY; 825 wtclock(sc); 826 return wtwait(sc, 0, "wtwfm"); 827 } 828 829 /* 830 * While controller status & mask == bits continue waiting. 831 */ 832 static u_char 833 wtsoft(struct wt_softc *sc, int mask, int bits) 834 { 835 bus_space_tag_t iot = sc->sc_iot; 836 bus_space_handle_t ioh = sc->sc_ioh; 837 u_char x; 838 int i; 839 840 841 /* Poll status port, waiting for specified bits. */ 842 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 843 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 844 if ((x & mask) != bits) 845 return x; 846 delay(1); 847 } 848 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 849 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 850 if ((x & mask) != bits) 851 return x; 852 delay(100); 853 } 854 for (;;) { /* forever */ 855 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 856 if ((x & mask) != bits) 857 return x; 858 tsleep((void *)wtsoft, WTPRI, "wtsoft", 1); 859 } 860 } 861 862 /* 863 * Execute QIC command. 864 */ 865 static int 866 wtcmd(struct wt_softc *sc, int cmd) 867 { 868 bus_space_tag_t iot = sc->sc_iot; 869 bus_space_handle_t ioh = sc->sc_ioh; 870 u_char x; 871 int s; 872 873 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 874 s = splbio(); 875 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 876 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 877 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 878 splx(s); 879 return 0; 880 } 881 882 /* output the command */ 883 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 884 885 /* set request */ 886 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 887 sc->regs.REQUEST | sc->regs.ONLINE); 888 889 /* wait for ready */ 890 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 891 892 /* reset request */ 893 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 894 sc->regs.IEN | sc->regs.ONLINE); 895 896 /* wait for not ready */ 897 wtsoft(sc, sc->regs.BUSY, 0); 898 splx(s); 899 return 1; 900 } 901 902 /* wait for the end of i/o, seeking marker or rewind operation */ 903 static int 904 wtwait(struct wt_softc *sc, int catch, const char *msg) 905 { 906 int error; 907 908 WTDBPRINT(("wtwait() `%s'\n", msg)); 909 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 910 if ((error = tsleep((void *)sc, WTPRI | catch, msg, 0)) != 0) 911 return error; 912 return 0; 913 } 914 915 /* initialize DMA for the i/o operation */ 916 static void 917 wtdma(struct wt_softc *sc) 918 { 919 bus_space_tag_t iot = sc->sc_iot; 920 bus_space_handle_t ioh = sc->sc_ioh; 921 922 sc->flags |= TPACTIVE; 923 wtclock(sc); 924 925 if (sc->type == ARCHIVE) { 926 /* Set DMA. */ 927 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 928 } 929 930 if ((sc->dmaflags & DMAMODE_READ) && 931 (sc->dmatotal - sc->dmacount) < sc->bsize) { 932 /* Reading short block; do it through the internal buffer. */ 933 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 934 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 935 } else 936 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 937 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 938 } 939 940 /* start i/o operation */ 941 static int 942 wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len) 943 { 944 u_char x; 945 946 WTDBPRINT(("wtstart()\n")); 947 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 948 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 949 if ((x & sc->regs.NOEXCEP) == 0) { 950 sc->flags |= TPEXCEP; /* error */ 951 return 0; 952 } 953 sc->flags &= ~TPEXCEP; /* clear exception flag */ 954 sc->dmavaddr = vaddr; 955 sc->dmatotal = len; 956 sc->dmacount = 0; 957 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 958 wtdma(sc); 959 return 1; 960 } 961 962 /* 963 * Start timer. 964 */ 965 static void 966 wtclock(struct wt_softc *sc) 967 { 968 969 if (sc->flags & TPTIMER) 970 return; 971 sc->flags |= TPTIMER; 972 /* 973 * Some controllers seem to lose DMA interrupts too often. To make the 974 * tape stream we need 1 tick timeout. 975 */ 976 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 977 wttimer, sc); 978 } 979 980 /* 981 * Simulate an interrupt periodically while i/o is going. 982 * This is necessary in case interrupts get eaten due to 983 * multiple devices on a single IRQ line. 984 */ 985 static void 986 wttimer(void *arg) 987 { 988 register struct wt_softc *sc = (struct wt_softc *)arg; 989 int s; 990 u_char status; 991 992 sc->flags &= ~TPTIMER; 993 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 994 return; 995 996 /* If i/o going, simulate interrupt. */ 997 s = splbio(); 998 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 999 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 1000 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 1001 WTDBPRINT(("wttimer() -- ")); 1002 wtintr(sc); 1003 } 1004 splx(s); 1005 1006 /* Restart timer if i/o pending. */ 1007 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1008 wtclock(sc); 1009 } 1010 1011 /* 1012 * Perform QIC-02 and QIC-36 compatible reset sequence. 1013 */ 1014 static int 1015 wtreset(bus_space_tag_t iot, bus_space_handle_t ioh, struct wtregs *regs) 1016 { 1017 u_char x; 1018 int i; 1019 1020 /* send reset */ 1021 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1022 delay(30); 1023 /* turn off reset */ 1024 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1025 delay(30); 1026 1027 /* Read the controller status. */ 1028 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1029 if (x == 0xff) /* no port at this address? */ 1030 return 0; 1031 1032 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1033 for (i = 0; i < 3000; ++i) { 1034 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1035 break; 1036 delay(1000); 1037 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1038 } 1039 return (x & regs->RESETMASK) == regs->RESETVAL; 1040 } 1041 1042 /* 1043 * Get controller status information. Return 0 if user i/o request should 1044 * receive an i/o error code. 1045 */ 1046 static int 1047 wtsense(struct wt_softc *sc, int verbose, int ignore) 1048 { 1049 const char *msg = 0; 1050 int error; 1051 1052 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1053 sc->flags &= ~(TPRO | TPWO); 1054 if (!wtstatus(sc)) 1055 return 0; 1056 if ((sc->error & TP_ST0) == 0) 1057 sc->error &= ~TP_ST0MASK; 1058 if ((sc->error & TP_ST1) == 0) 1059 sc->error &= ~TP_ST1MASK; 1060 sc->error &= ~ignore; /* ignore certain errors */ 1061 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1062 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1063 if (!error) 1064 return 1; 1065 if (!verbose) 1066 return 0; 1067 1068 /* lifted from tdriver.c from Wangtek */ 1069 if (error & TP_USL) 1070 msg = "Drive not online"; 1071 else if (error & TP_CNI) 1072 msg = "No cartridge"; 1073 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1074 msg = "Tape is write protected"; 1075 sc->flags |= TPWP; 1076 } else if (error & TP_FIL) 1077 msg = 0 /*"Filemark detected"*/; 1078 else if (error & TP_EOM) 1079 msg = 0 /*"End of tape"*/; 1080 else if (error & TP_BNL) 1081 msg = "Block not located"; 1082 else if (error & TP_UDA) 1083 msg = "Unrecoverable data error"; 1084 else if (error & TP_NDT) 1085 msg = "No data detected"; 1086 else if (error & TP_ILL) 1087 msg = "Illegal command"; 1088 if (msg) 1089 printf("%s: %s\n", device_xname(&sc->sc_dev), msg); 1090 return 0; 1091 } 1092 1093 /* 1094 * Get controller status information. 1095 */ 1096 static int 1097 wtstatus(struct wt_softc *sc) 1098 { 1099 bus_space_tag_t iot = sc->sc_iot; 1100 bus_space_handle_t ioh = sc->sc_ioh; 1101 char *p; 1102 int s; 1103 1104 s = splbio(); 1105 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1106 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1107 /* send `read status' command */ 1108 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1109 1110 /* set request */ 1111 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1112 sc->regs.REQUEST | sc->regs.ONLINE); 1113 1114 /* wait for ready */ 1115 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1116 /* reset request */ 1117 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1118 1119 /* wait for not ready */ 1120 wtsoft(sc, sc->regs.BUSY, 0); 1121 1122 p = (char *)&sc->error; 1123 while (p < (char *)&sc->error + 6) { 1124 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1125 sc->regs.BUSY | sc->regs.NOEXCEP); 1126 1127 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1128 splx(s); 1129 return 0; 1130 } 1131 1132 /* read status byte */ 1133 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1134 1135 /* set request */ 1136 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1137 sc->regs.REQUEST | sc->regs.ONLINE); 1138 1139 /* wait for not ready */ 1140 wtsoft(sc, sc->regs.BUSY, 0); 1141 1142 /* unset request */ 1143 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1144 } 1145 splx(s); 1146 return 1; 1147 } 1148