1 /* $NetBSD: wt.c,v 1.82 2009/05/12 09:10:16 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 1.82 2009/05/12 09:10:16 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(device_t, cfdata_t, void *); 185 void wtattach(device_t, device_t, 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(device_t parent, cfdata_t 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(device_t parent, device_t 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, 0); 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 aprint_error_dev(self, "lost controller\n"); 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 aprint_error_dev(&sc->sc_dev, "max DMA size %lu is less than required %d\n", 310 (u_long)maxsize, MAXPHYS); 311 return; 312 } 313 314 if (isa_drq_alloc(sc->sc_ic, sc->chan) != 0) { 315 aprint_error_dev(&sc->sc_dev, "can't reserve drq %d\n", 316 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 aprint_error_dev(&sc->sc_dev, "can't set up ISA DMA map\n"); 323 return; 324 } 325 326 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 327 IST_EDGE, IPL_BIO, wtintr, sc); 328 } 329 330 static int 331 wtdump(dev_t dev, daddr_t blkno, void *va, 332 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_private(&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 aprint_error_dev(&sc->sc_dev, "invalid tape density\n"); 411 return ENODEV; 412 } 413 } 414 sc->dens = minor(dev) & WT_DENSEL; 415 } 416 sc->flags &= ~TPSTART; 417 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 418 return ENXIO; 419 420 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 421 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 422 423 sc->flags = TPINUSE; 424 if (flag & FREAD) 425 sc->flags |= TPREAD; 426 if (flag & FWRITE) 427 sc->flags |= TPWRITE; 428 return 0; 429 } 430 431 /* 432 * Close routine, called on last device close. 433 */ 434 static int 435 wtclose(dev_t dev, int flags, int mode, 436 struct lwp *l) 437 { 438 struct wt_softc *sc; 439 440 sc = device_lookup_private(&wt_cd, minor(dev) & T_UNIT); 441 442 /* If rewind is pending, do nothing */ 443 if (sc->flags & TPREW) 444 goto done; 445 446 /* If seek forward is pending and no rewind on close, do nothing */ 447 if (sc->flags & TPRMARK) { 448 if (minor(dev) & T_NOREWIND) 449 goto done; 450 451 /* If read file mark is going on, wait */ 452 wtwait(sc, 0, "wtrfm"); 453 } 454 455 if (sc->flags & TPWANY) { 456 /* Tape was written. Write file mark. */ 457 wtwritefm(sc); 458 } 459 460 if ((minor(dev) & T_NOREWIND) == 0) { 461 /* Rewind to beginning of tape. */ 462 /* Don't wait until rewind, though. */ 463 wtrewind(sc); 464 goto done; 465 } 466 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 467 /* Space forward to after next file mark if no writing done. */ 468 /* Don't wait for completion. */ 469 wtreadfm(sc); 470 } 471 472 done: 473 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 474 free(sc->buf, M_TEMP); 475 return 0; 476 } 477 478 /* 479 * Ioctl routine. Compatible with BSD ioctls. 480 * Direct QIC-02 commands ERASE and RETENSION added. 481 * There are three possible ioctls: 482 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 483 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 484 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 485 */ 486 static int 487 wtioctl(dev_t dev, unsigned long cmd, void *addr, int flag, 488 struct lwp *l) 489 { 490 struct wt_softc *sc; 491 int error, count, op; 492 493 sc = device_lookup_private(&wt_cd, minor(dev) & T_UNIT); 494 495 switch (cmd) { 496 default: 497 return EINVAL; 498 case WTQICMD: /* direct QIC command */ 499 op = *(int *)addr; 500 switch (op) { 501 default: 502 return EINVAL; 503 case QIC_ERASE: /* erase the whole tape */ 504 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 505 return EACCES; 506 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 507 return error; 508 break; 509 case QIC_RETENS: /* retension the tape */ 510 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 511 return error; 512 break; 513 } 514 /* Both ERASE and RETENS operations work like REWIND. */ 515 /* Simulate the rewind operation here. */ 516 sc->flags &= ~(TPRO | TPWO | TPVOL); 517 if (!wtcmd(sc, op)) 518 return EIO; 519 sc->flags |= TPSTART | TPREW; 520 if (op == QIC_ERASE) 521 sc->flags |= TPWANY; 522 wtclock(sc); 523 return 0; 524 case MTIOCIEOT: /* ignore EOT errors */ 525 case MTIOCEEOT: /* enable EOT errors */ 526 return 0; 527 case MTIOCGET: 528 ((struct mtget*)addr)->mt_type = 529 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 530 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 531 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 532 ((struct mtget*)addr)->mt_resid = 0; 533 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 534 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 535 return 0; 536 case MTIOCTOP: 537 break; 538 } 539 540 switch ((short)((struct mtop*)addr)->mt_op) { 541 default: 542 #if 0 543 case MTFSR: /* forward space record */ 544 case MTBSR: /* backward space record */ 545 case MTBSF: /* backward space file */ 546 #endif 547 return EINVAL; 548 case MTNOP: /* no operation, sets status only */ 549 case MTCACHE: /* enable controller cache */ 550 case MTNOCACHE: /* disable controller cache */ 551 return 0; 552 case MTREW: /* rewind */ 553 case MTOFFL: /* rewind and put the drive offline */ 554 if (sc->flags & TPREW) /* rewind is running */ 555 return 0; 556 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 557 return error; 558 wtrewind(sc); 559 return 0; 560 case MTFSF: /* forward space file */ 561 for (count = ((struct mtop*)addr)->mt_count; count > 0; 562 --count) { 563 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 564 return error; 565 if ((error = wtreadfm(sc)) != 0) 566 return error; 567 } 568 return 0; 569 case MTWEOF: /* write an end-of-file record */ 570 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 571 return EACCES; 572 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 573 return error; 574 if ((error = wtwritefm(sc)) != 0) 575 return error; 576 return 0; 577 } 578 579 #ifdef DIAGNOSTIC 580 panic("wtioctl: impossible"); 581 #endif 582 } 583 584 /* 585 * Strategy routine. 586 */ 587 static void 588 wtstrategy(struct buf *bp) 589 { 590 struct wt_softc *sc; 591 int s; 592 593 sc = device_lookup_private(&wt_cd, minor(bp->b_dev) & T_UNIT); 594 595 bp->b_resid = bp->b_bcount; 596 597 /* at file marks and end of tape, we just return '0 bytes available' */ 598 if (sc->flags & TPVOL) 599 goto xit; 600 601 if (bp->b_flags & B_READ) { 602 /* Check read access and no previous write to this tape. */ 603 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 604 goto errxit; 605 606 /* For now, we assume that all data will be copied out */ 607 /* If read command outstanding, just skip down */ 608 if ((sc->flags & TPRO) == 0) { 609 if (!wtsense(sc, 1, TP_WRP)) { 610 /* Clear status. */ 611 goto errxit; 612 } 613 if (!wtcmd(sc, QIC_RDDATA)) { 614 /* Set read mode. */ 615 wtsense(sc, 1, TP_WRP); 616 goto errxit; 617 } 618 sc->flags |= TPRO | TPRANY; 619 } 620 } else { 621 /* Check write access and write protection. */ 622 /* No previous read from this tape allowed. */ 623 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 624 goto errxit; 625 626 /* If write command outstanding, just skip down */ 627 if ((sc->flags & TPWO) == 0) { 628 if (!wtsense(sc, 1, 0)) { 629 /* Clear status. */ 630 goto errxit; 631 } 632 if (!wtcmd(sc, QIC_WRTDATA)) { 633 /* Set write mode. */ 634 wtsense(sc, 1, 0); 635 goto errxit; 636 } 637 sc->flags |= TPWO | TPWANY; 638 } 639 } 640 641 if (bp->b_bcount == 0) 642 goto xit; 643 644 sc->flags &= ~TPEXCEP; 645 s = splbio(); 646 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 647 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 648 bp->b_resid -= sc->dmacount; 649 } 650 splx(s); 651 652 if (sc->flags & TPEXCEP) { 653 errxit: 654 bp->b_error = EIO; 655 } 656 xit: 657 biodone(bp); 658 return; 659 } 660 661 static int 662 wtread(dev_t dev, struct uio *uio, int flags) 663 { 664 665 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 666 } 667 668 static int 669 wtwrite(dev_t dev, struct uio *uio, int flags) 670 { 671 672 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 673 } 674 675 /* 676 * Interrupt routine. 677 */ 678 static int 679 wtintr(void *arg) 680 { 681 struct wt_softc *sc = arg; 682 u_char x; 683 684 /* get status */ 685 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 686 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 687 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 688 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 689 WTDBPRINT(("busy\n")); 690 return 0; /* device is busy */ 691 } 692 693 /* 694 * Check if rewind finished. 695 */ 696 if (sc->flags & TPREW) { 697 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 698 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 699 "rewind busy?\n" : "rewind finished\n")); 700 sc->flags &= ~TPREW; /* rewind finished */ 701 wtsense(sc, 1, TP_WRP); 702 wakeup((void *)sc); 703 return 1; 704 } 705 706 /* 707 * Check if writing/reading of file mark finished. 708 */ 709 if (sc->flags & (TPRMARK | TPWMARK)) { 710 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 711 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 712 "marker r/w busy?\n" : "marker r/w finished\n")); 713 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 714 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 715 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 716 wakeup((void *)sc); 717 return 1; 718 } 719 720 /* 721 * Do we started any i/o? If no, just return. 722 */ 723 if ((sc->flags & TPACTIVE) == 0) { 724 WTDBPRINT(("unexpected interrupt\n")); 725 return 0; 726 } 727 sc->flags &= ~TPACTIVE; 728 sc->dmacount += sc->bsize; /* increment counter */ 729 730 /* 731 * Clean up DMA. 732 */ 733 if ((sc->dmaflags & DMAMODE_READ) && 734 (sc->dmatotal - sc->dmacount) < sc->bsize) { 735 /* If reading short block, copy the internal buffer 736 * to the user memory. */ 737 isa_dmadone(sc->sc_ic, sc->chan); 738 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 739 } else 740 isa_dmadone(sc->sc_ic, sc->chan); 741 742 /* 743 * On exception, check for end of file and end of volume. 744 */ 745 if ((x & sc->regs.NOEXCEP) == 0) { 746 WTDBPRINT(("i/o exception\n")); 747 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 748 if (sc->error & (TP_EOM | TP_FIL)) 749 sc->flags |= TPVOL; /* end of file */ 750 else 751 sc->flags |= TPEXCEP; /* i/o error */ 752 wakeup((void *)sc); 753 return 1; 754 } 755 756 if (sc->dmacount < sc->dmatotal) { 757 /* Continue I/O. */ 758 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 759 wtdma(sc); 760 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 761 return 1; 762 } 763 if (sc->dmacount > sc->dmatotal) /* short last block */ 764 sc->dmacount = sc->dmatotal; 765 /* Wake up user level. */ 766 wakeup((void *)sc); 767 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 768 return 1; 769 } 770 771 /* start the rewind operation */ 772 static void 773 wtrewind(struct wt_softc *sc) 774 { 775 int rwmode = sc->flags & (TPRO | TPWO); 776 777 sc->flags &= ~(TPRO | TPWO | TPVOL); 778 /* 779 * Wangtek strictly follows QIC-02 standard: 780 * clearing ONLINE in read/write modes causes rewind. 781 * REWIND command is not allowed in read/write mode 782 * and gives `illegal command' error. 783 */ 784 if (sc->type == WANGTEK && rwmode) { 785 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 786 } else if (!wtcmd(sc, QIC_REWIND)) 787 return; 788 sc->flags |= TPSTART | TPREW; 789 wtclock(sc); 790 } 791 792 /* 793 * Start the `read marker' operation. 794 */ 795 static int 796 wtreadfm(struct wt_softc *sc) 797 { 798 799 sc->flags &= ~(TPRO | TPWO | TPVOL); 800 if (!wtcmd(sc, QIC_READFM)) { 801 wtsense(sc, 1, TP_WRP); 802 return EIO; 803 } 804 sc->flags |= TPRMARK | TPRANY; 805 wtclock(sc); 806 /* Don't wait for completion here. */ 807 return 0; 808 } 809 810 /* 811 * Write marker to the tape. 812 */ 813 static int 814 wtwritefm(struct wt_softc *sc) 815 { 816 817 tsleep((void *)wtwritefm, WTPRI, "wtwfm", hz); 818 sc->flags &= ~(TPRO | TPWO); 819 if (!wtcmd(sc, QIC_WRITEFM)) { 820 wtsense(sc, 1, 0); 821 return EIO; 822 } 823 sc->flags |= TPWMARK | TPWANY; 824 wtclock(sc); 825 return wtwait(sc, 0, "wtwfm"); 826 } 827 828 /* 829 * While controller status & mask == bits continue waiting. 830 */ 831 static u_char 832 wtsoft(struct wt_softc *sc, int mask, int bits) 833 { 834 bus_space_tag_t iot = sc->sc_iot; 835 bus_space_handle_t ioh = sc->sc_ioh; 836 u_char x; 837 int i; 838 839 840 /* Poll status port, waiting for specified bits. */ 841 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 842 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 843 if ((x & mask) != bits) 844 return x; 845 delay(1); 846 } 847 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 848 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 849 if ((x & mask) != bits) 850 return x; 851 delay(100); 852 } 853 for (;;) { /* forever */ 854 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 855 if ((x & mask) != bits) 856 return x; 857 tsleep((void *)wtsoft, WTPRI, "wtsoft", 1); 858 } 859 } 860 861 /* 862 * Execute QIC command. 863 */ 864 static int 865 wtcmd(struct wt_softc *sc, int cmd) 866 { 867 bus_space_tag_t iot = sc->sc_iot; 868 bus_space_handle_t ioh = sc->sc_ioh; 869 u_char x; 870 int s; 871 872 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 873 s = splbio(); 874 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 875 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 876 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 877 splx(s); 878 return 0; 879 } 880 881 /* output the command */ 882 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 883 884 /* set request */ 885 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 886 sc->regs.REQUEST | sc->regs.ONLINE); 887 888 /* wait for ready */ 889 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 890 891 /* reset request */ 892 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 893 sc->regs.IEN | sc->regs.ONLINE); 894 895 /* wait for not ready */ 896 wtsoft(sc, sc->regs.BUSY, 0); 897 splx(s); 898 return 1; 899 } 900 901 /* wait for the end of i/o, seeking marker or rewind operation */ 902 static int 903 wtwait(struct wt_softc *sc, int catch, const char *msg) 904 { 905 int error; 906 907 WTDBPRINT(("wtwait() `%s'\n", msg)); 908 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 909 if ((error = tsleep((void *)sc, WTPRI | catch, msg, 0)) != 0) 910 return error; 911 return 0; 912 } 913 914 /* initialize DMA for the i/o operation */ 915 static void 916 wtdma(struct wt_softc *sc) 917 { 918 bus_space_tag_t iot = sc->sc_iot; 919 bus_space_handle_t ioh = sc->sc_ioh; 920 921 sc->flags |= TPACTIVE; 922 wtclock(sc); 923 924 if (sc->type == ARCHIVE) { 925 /* Set DMA. */ 926 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 927 } 928 929 if ((sc->dmaflags & DMAMODE_READ) && 930 (sc->dmatotal - sc->dmacount) < sc->bsize) { 931 /* Reading short block; do it through the internal buffer. */ 932 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 933 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 934 } else 935 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 936 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 937 } 938 939 /* start i/o operation */ 940 static int 941 wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len) 942 { 943 u_char x; 944 945 WTDBPRINT(("wtstart()\n")); 946 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 947 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 948 if ((x & sc->regs.NOEXCEP) == 0) { 949 sc->flags |= TPEXCEP; /* error */ 950 return 0; 951 } 952 sc->flags &= ~TPEXCEP; /* clear exception flag */ 953 sc->dmavaddr = vaddr; 954 sc->dmatotal = len; 955 sc->dmacount = 0; 956 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 957 wtdma(sc); 958 return 1; 959 } 960 961 /* 962 * Start timer. 963 */ 964 static void 965 wtclock(struct wt_softc *sc) 966 { 967 968 if (sc->flags & TPTIMER) 969 return; 970 sc->flags |= TPTIMER; 971 /* 972 * Some controllers seem to lose DMA interrupts too often. To make the 973 * tape stream we need 1 tick timeout. 974 */ 975 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 976 wttimer, sc); 977 } 978 979 /* 980 * Simulate an interrupt periodically while i/o is going. 981 * This is necessary in case interrupts get eaten due to 982 * multiple devices on a single IRQ line. 983 */ 984 static void 985 wttimer(void *arg) 986 { 987 register struct wt_softc *sc = (struct wt_softc *)arg; 988 int s; 989 u_char status; 990 991 sc->flags &= ~TPTIMER; 992 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 993 return; 994 995 /* If i/o going, simulate interrupt. */ 996 s = splbio(); 997 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 998 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 999 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 1000 WTDBPRINT(("wttimer() -- ")); 1001 wtintr(sc); 1002 } 1003 splx(s); 1004 1005 /* Restart timer if i/o pending. */ 1006 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1007 wtclock(sc); 1008 } 1009 1010 /* 1011 * Perform QIC-02 and QIC-36 compatible reset sequence. 1012 */ 1013 static int 1014 wtreset(bus_space_tag_t iot, bus_space_handle_t ioh, struct wtregs *regs) 1015 { 1016 u_char x; 1017 int i; 1018 1019 /* send reset */ 1020 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1021 delay(30); 1022 /* turn off reset */ 1023 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1024 delay(30); 1025 1026 /* Read the controller status. */ 1027 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1028 if (x == 0xff) /* no port at this address? */ 1029 return 0; 1030 1031 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1032 for (i = 0; i < 3000; ++i) { 1033 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1034 break; 1035 delay(1000); 1036 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1037 } 1038 return (x & regs->RESETMASK) == regs->RESETVAL; 1039 } 1040 1041 /* 1042 * Get controller status information. Return 0 if user i/o request should 1043 * receive an i/o error code. 1044 */ 1045 static int 1046 wtsense(struct wt_softc *sc, int verbose, int ignore) 1047 { 1048 const char *msg = 0; 1049 int error; 1050 1051 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1052 sc->flags &= ~(TPRO | TPWO); 1053 if (!wtstatus(sc)) 1054 return 0; 1055 if ((sc->error & TP_ST0) == 0) 1056 sc->error &= ~TP_ST0MASK; 1057 if ((sc->error & TP_ST1) == 0) 1058 sc->error &= ~TP_ST1MASK; 1059 sc->error &= ~ignore; /* ignore certain errors */ 1060 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1061 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1062 if (!error) 1063 return 1; 1064 if (!verbose) 1065 return 0; 1066 1067 /* lifted from tdriver.c from Wangtek */ 1068 if (error & TP_USL) 1069 msg = "Drive not online"; 1070 else if (error & TP_CNI) 1071 msg = "No cartridge"; 1072 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1073 msg = "Tape is write protected"; 1074 sc->flags |= TPWP; 1075 } else if (error & TP_FIL) 1076 msg = 0 /*"Filemark detected"*/; 1077 else if (error & TP_EOM) 1078 msg = 0 /*"End of tape"*/; 1079 else if (error & TP_BNL) 1080 msg = "Block not located"; 1081 else if (error & TP_UDA) 1082 msg = "Unrecoverable data error"; 1083 else if (error & TP_NDT) 1084 msg = "No data detected"; 1085 else if (error & TP_ILL) 1086 msg = "Illegal command"; 1087 if (msg) 1088 printf("%s: %s\n", device_xname(&sc->sc_dev), msg); 1089 return 0; 1090 } 1091 1092 /* 1093 * Get controller status information. 1094 */ 1095 static int 1096 wtstatus(struct wt_softc *sc) 1097 { 1098 bus_space_tag_t iot = sc->sc_iot; 1099 bus_space_handle_t ioh = sc->sc_ioh; 1100 char *p; 1101 int s; 1102 1103 s = splbio(); 1104 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1105 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1106 /* send `read status' command */ 1107 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1108 1109 /* set request */ 1110 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1111 sc->regs.REQUEST | sc->regs.ONLINE); 1112 1113 /* wait for ready */ 1114 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1115 /* reset request */ 1116 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1117 1118 /* wait for not ready */ 1119 wtsoft(sc, sc->regs.BUSY, 0); 1120 1121 p = (char *)&sc->error; 1122 while (p < (char *)&sc->error + 6) { 1123 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1124 sc->regs.BUSY | sc->regs.NOEXCEP); 1125 1126 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1127 splx(s); 1128 return 0; 1129 } 1130 1131 /* read status byte */ 1132 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1133 1134 /* set request */ 1135 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1136 sc->regs.REQUEST | sc->regs.ONLINE); 1137 1138 /* wait for not ready */ 1139 wtsoft(sc, sc->regs.BUSY, 0); 1140 1141 /* unset request */ 1142 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1143 } 1144 splx(s); 1145 return 1; 1146 } 1147