1 /* $NetBSD: wt.c,v 1.83 2012/10/27 17:18:25 chs 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 1.83 2012/10/27 17:18:25 chs 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 device_t 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_NEW(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 = device_private(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 sc->sc_dev = self; 269 270 /* Map i/o space */ 271 if (bus_space_map(iot, ia->ia_io[0].ir_addr, AV_NPORT, 0, &ioh)) { 272 printf(": can't map i/o space\n"); 273 return; 274 } 275 276 sc->sc_iot = iot; 277 sc->sc_ioh = ioh; 278 sc->sc_ic = ia->ia_ic; 279 280 callout_init(&sc->sc_timer_ch, 0); 281 282 /* Try Wangtek. */ 283 if (wtreset(iot, ioh, &wtregs)) { 284 sc->type = WANGTEK; 285 memcpy(&sc->regs, &wtregs, sizeof(sc->regs)); 286 printf(": type <Wangtek>\n"); 287 goto ok; 288 } 289 290 /* Try Archive. */ 291 if (wtreset(iot, ioh, &avregs)) { 292 sc->type = ARCHIVE; 293 memcpy(&sc->regs, &avregs, sizeof(sc->regs)); 294 printf(": type <Archive>\n"); 295 /* Reset DMA. */ 296 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 297 goto ok; 298 } 299 300 /* what happened? */ 301 aprint_error_dev(self, "lost controller\n"); 302 return; 303 304 ok: 305 sc->flags = TPSTART; /* tape is rewound */ 306 sc->dens = -1; /* unknown density */ 307 308 sc->chan = ia->ia_drq[0].ir_drq; 309 310 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->chan)) < MAXPHYS) { 311 aprint_error_dev(sc->sc_dev, "max DMA size %lu is less than required %d\n", 312 (u_long)maxsize, MAXPHYS); 313 return; 314 } 315 316 if (isa_drq_alloc(sc->sc_ic, sc->chan) != 0) { 317 aprint_error_dev(sc->sc_dev, "can't reserve drq %d\n", 318 sc->chan); 319 return; 320 } 321 322 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 323 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 324 aprint_error_dev(sc->sc_dev, "can't set up ISA DMA map\n"); 325 return; 326 } 327 328 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 329 IST_EDGE, IPL_BIO, wtintr, sc); 330 } 331 332 static int 333 wtdump(dev_t dev, daddr_t blkno, void *va, 334 size_t size) 335 { 336 337 /* Not implemented. */ 338 return ENXIO; 339 } 340 341 static int 342 wtsize(dev_t dev) 343 { 344 345 /* Not implemented. */ 346 return -1; 347 } 348 349 /* 350 * Open routine, called on every device open. 351 */ 352 static int 353 wtopen(dev_t dev, int flag, int mode, struct lwp *l) 354 { 355 int unit = minor(dev) & T_UNIT; 356 struct wt_softc *sc; 357 int error; 358 359 sc = device_lookup_private(&wt_cd, unit); 360 if (sc == NULL) 361 return (ENXIO); 362 363 /* Check that device is not in use */ 364 if (sc->flags & TPINUSE) 365 return EBUSY; 366 367 /* If the tape is in rewound state, check the status and set density. */ 368 if (sc->flags & TPSTART) { 369 /* If rewind is going on, wait */ 370 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 371 return error; 372 373 /* Check the controller status */ 374 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 375 /* Bad status, reset the controller. */ 376 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 377 return EIO; 378 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 379 return EIO; 380 } 381 382 /* Set up tape density. */ 383 if (sc->dens != (minor(dev) & WT_DENSEL)) { 384 int d = 0; 385 386 switch (minor(dev) & WT_DENSEL) { 387 case WT_DENSDFLT: 388 default: 389 break; /* default density */ 390 case WT_QIC11: 391 d = QIC_FMT11; break; /* minor 010 */ 392 case WT_QIC24: 393 d = QIC_FMT24; break; /* minor 020 */ 394 case WT_QIC120: 395 d = QIC_FMT120; break; /* minor 030 */ 396 case WT_QIC150: 397 d = QIC_FMT150; break; /* minor 040 */ 398 case WT_QIC300: 399 d = QIC_FMT300; break; /* minor 050 */ 400 case WT_QIC600: 401 d = QIC_FMT600; break; /* minor 060 */ 402 } 403 if (d) { 404 /* Change tape density. */ 405 if (!wtcmd(sc, d)) 406 return EIO; 407 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 408 return EIO; 409 410 /* Check the status of the controller. */ 411 if (sc->error & TP_ILL) { 412 aprint_error_dev(sc->sc_dev, "invalid tape density\n"); 413 return ENODEV; 414 } 415 } 416 sc->dens = minor(dev) & WT_DENSEL; 417 } 418 sc->flags &= ~TPSTART; 419 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 420 return ENXIO; 421 422 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 423 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 424 425 sc->flags = TPINUSE; 426 if (flag & FREAD) 427 sc->flags |= TPREAD; 428 if (flag & FWRITE) 429 sc->flags |= TPWRITE; 430 return 0; 431 } 432 433 /* 434 * Close routine, called on last device close. 435 */ 436 static int 437 wtclose(dev_t dev, int flags, int mode, 438 struct lwp *l) 439 { 440 struct wt_softc *sc; 441 442 sc = device_lookup_private(&wt_cd, minor(dev) & T_UNIT); 443 444 /* If rewind is pending, do nothing */ 445 if (sc->flags & TPREW) 446 goto done; 447 448 /* If seek forward is pending and no rewind on close, do nothing */ 449 if (sc->flags & TPRMARK) { 450 if (minor(dev) & T_NOREWIND) 451 goto done; 452 453 /* If read file mark is going on, wait */ 454 wtwait(sc, 0, "wtrfm"); 455 } 456 457 if (sc->flags & TPWANY) { 458 /* Tape was written. Write file mark. */ 459 wtwritefm(sc); 460 } 461 462 if ((minor(dev) & T_NOREWIND) == 0) { 463 /* Rewind to beginning of tape. */ 464 /* Don't wait until rewind, though. */ 465 wtrewind(sc); 466 goto done; 467 } 468 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 469 /* Space forward to after next file mark if no writing done. */ 470 /* Don't wait for completion. */ 471 wtreadfm(sc); 472 } 473 474 done: 475 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 476 free(sc->buf, M_TEMP); 477 return 0; 478 } 479 480 /* 481 * Ioctl routine. Compatible with BSD ioctls. 482 * Direct QIC-02 commands ERASE and RETENSION added. 483 * There are three possible ioctls: 484 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 485 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 486 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 487 */ 488 static int 489 wtioctl(dev_t dev, unsigned long cmd, void *addr, int flag, 490 struct lwp *l) 491 { 492 struct wt_softc *sc; 493 int error, count, op; 494 495 sc = device_lookup_private(&wt_cd, minor(dev) & T_UNIT); 496 497 switch (cmd) { 498 default: 499 return EINVAL; 500 case WTQICMD: /* direct QIC command */ 501 op = *(int *)addr; 502 switch (op) { 503 default: 504 return EINVAL; 505 case QIC_ERASE: /* erase the whole tape */ 506 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 507 return EACCES; 508 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 509 return error; 510 break; 511 case QIC_RETENS: /* retension the tape */ 512 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 513 return error; 514 break; 515 } 516 /* Both ERASE and RETENS operations work like REWIND. */ 517 /* Simulate the rewind operation here. */ 518 sc->flags &= ~(TPRO | TPWO | TPVOL); 519 if (!wtcmd(sc, op)) 520 return EIO; 521 sc->flags |= TPSTART | TPREW; 522 if (op == QIC_ERASE) 523 sc->flags |= TPWANY; 524 wtclock(sc); 525 return 0; 526 case MTIOCIEOT: /* ignore EOT errors */ 527 case MTIOCEEOT: /* enable EOT errors */ 528 return 0; 529 case MTIOCGET: 530 ((struct mtget*)addr)->mt_type = 531 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 532 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 533 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 534 ((struct mtget*)addr)->mt_resid = 0; 535 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 536 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 537 return 0; 538 case MTIOCTOP: 539 break; 540 } 541 542 switch ((short)((struct mtop*)addr)->mt_op) { 543 default: 544 #if 0 545 case MTFSR: /* forward space record */ 546 case MTBSR: /* backward space record */ 547 case MTBSF: /* backward space file */ 548 #endif 549 return EINVAL; 550 case MTNOP: /* no operation, sets status only */ 551 case MTCACHE: /* enable controller cache */ 552 case MTNOCACHE: /* disable controller cache */ 553 return 0; 554 case MTREW: /* rewind */ 555 case MTOFFL: /* rewind and put the drive offline */ 556 if (sc->flags & TPREW) /* rewind is running */ 557 return 0; 558 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 559 return error; 560 wtrewind(sc); 561 return 0; 562 case MTFSF: /* forward space file */ 563 for (count = ((struct mtop*)addr)->mt_count; count > 0; 564 --count) { 565 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 566 return error; 567 if ((error = wtreadfm(sc)) != 0) 568 return error; 569 } 570 return 0; 571 case MTWEOF: /* write an end-of-file record */ 572 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 573 return EACCES; 574 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 575 return error; 576 if ((error = wtwritefm(sc)) != 0) 577 return error; 578 return 0; 579 } 580 581 #ifdef DIAGNOSTIC 582 panic("wtioctl: impossible"); 583 #endif 584 } 585 586 /* 587 * Strategy routine. 588 */ 589 static void 590 wtstrategy(struct buf *bp) 591 { 592 struct wt_softc *sc; 593 int s; 594 595 sc = device_lookup_private(&wt_cd, minor(bp->b_dev) & T_UNIT); 596 597 bp->b_resid = bp->b_bcount; 598 599 /* at file marks and end of tape, we just return '0 bytes available' */ 600 if (sc->flags & TPVOL) 601 goto xit; 602 603 if (bp->b_flags & B_READ) { 604 /* Check read access and no previous write to this tape. */ 605 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 606 goto errxit; 607 608 /* For now, we assume that all data will be copied out */ 609 /* If read command outstanding, just skip down */ 610 if ((sc->flags & TPRO) == 0) { 611 if (!wtsense(sc, 1, TP_WRP)) { 612 /* Clear status. */ 613 goto errxit; 614 } 615 if (!wtcmd(sc, QIC_RDDATA)) { 616 /* Set read mode. */ 617 wtsense(sc, 1, TP_WRP); 618 goto errxit; 619 } 620 sc->flags |= TPRO | TPRANY; 621 } 622 } else { 623 /* Check write access and write protection. */ 624 /* No previous read from this tape allowed. */ 625 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 626 goto errxit; 627 628 /* If write command outstanding, just skip down */ 629 if ((sc->flags & TPWO) == 0) { 630 if (!wtsense(sc, 1, 0)) { 631 /* Clear status. */ 632 goto errxit; 633 } 634 if (!wtcmd(sc, QIC_WRTDATA)) { 635 /* Set write mode. */ 636 wtsense(sc, 1, 0); 637 goto errxit; 638 } 639 sc->flags |= TPWO | TPWANY; 640 } 641 } 642 643 if (bp->b_bcount == 0) 644 goto xit; 645 646 sc->flags &= ~TPEXCEP; 647 s = splbio(); 648 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 649 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 650 bp->b_resid -= sc->dmacount; 651 } 652 splx(s); 653 654 if (sc->flags & TPEXCEP) { 655 errxit: 656 bp->b_error = EIO; 657 } 658 xit: 659 biodone(bp); 660 return; 661 } 662 663 static int 664 wtread(dev_t dev, struct uio *uio, int flags) 665 { 666 667 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 668 } 669 670 static int 671 wtwrite(dev_t dev, struct uio *uio, int flags) 672 { 673 674 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 675 } 676 677 /* 678 * Interrupt routine. 679 */ 680 static int 681 wtintr(void *arg) 682 { 683 struct wt_softc *sc = arg; 684 u_char x; 685 686 /* get status */ 687 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 688 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 689 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 690 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 691 WTDBPRINT(("busy\n")); 692 return 0; /* device is busy */ 693 } 694 695 /* 696 * Check if rewind finished. 697 */ 698 if (sc->flags & TPREW) { 699 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 700 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 701 "rewind busy?\n" : "rewind finished\n")); 702 sc->flags &= ~TPREW; /* rewind finished */ 703 wtsense(sc, 1, TP_WRP); 704 wakeup((void *)sc); 705 return 1; 706 } 707 708 /* 709 * Check if writing/reading of file mark finished. 710 */ 711 if (sc->flags & (TPRMARK | TPWMARK)) { 712 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 713 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 714 "marker r/w busy?\n" : "marker r/w finished\n")); 715 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 716 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 717 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 718 wakeup((void *)sc); 719 return 1; 720 } 721 722 /* 723 * Do we started any i/o? If no, just return. 724 */ 725 if ((sc->flags & TPACTIVE) == 0) { 726 WTDBPRINT(("unexpected interrupt\n")); 727 return 0; 728 } 729 sc->flags &= ~TPACTIVE; 730 sc->dmacount += sc->bsize; /* increment counter */ 731 732 /* 733 * Clean up DMA. 734 */ 735 if ((sc->dmaflags & DMAMODE_READ) && 736 (sc->dmatotal - sc->dmacount) < sc->bsize) { 737 /* If reading short block, copy the internal buffer 738 * to the user memory. */ 739 isa_dmadone(sc->sc_ic, sc->chan); 740 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 741 } else 742 isa_dmadone(sc->sc_ic, sc->chan); 743 744 /* 745 * On exception, check for end of file and end of volume. 746 */ 747 if ((x & sc->regs.NOEXCEP) == 0) { 748 WTDBPRINT(("i/o exception\n")); 749 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 750 if (sc->error & (TP_EOM | TP_FIL)) 751 sc->flags |= TPVOL; /* end of file */ 752 else 753 sc->flags |= TPEXCEP; /* i/o error */ 754 wakeup((void *)sc); 755 return 1; 756 } 757 758 if (sc->dmacount < sc->dmatotal) { 759 /* Continue I/O. */ 760 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 761 wtdma(sc); 762 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 763 return 1; 764 } 765 if (sc->dmacount > sc->dmatotal) /* short last block */ 766 sc->dmacount = sc->dmatotal; 767 /* Wake up user level. */ 768 wakeup((void *)sc); 769 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 770 return 1; 771 } 772 773 /* start the rewind operation */ 774 static void 775 wtrewind(struct wt_softc *sc) 776 { 777 int rwmode = sc->flags & (TPRO | TPWO); 778 779 sc->flags &= ~(TPRO | TPWO | TPVOL); 780 /* 781 * Wangtek strictly follows QIC-02 standard: 782 * clearing ONLINE in read/write modes causes rewind. 783 * REWIND command is not allowed in read/write mode 784 * and gives `illegal command' error. 785 */ 786 if (sc->type == WANGTEK && rwmode) { 787 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 788 } else if (!wtcmd(sc, QIC_REWIND)) 789 return; 790 sc->flags |= TPSTART | TPREW; 791 wtclock(sc); 792 } 793 794 /* 795 * Start the `read marker' operation. 796 */ 797 static int 798 wtreadfm(struct wt_softc *sc) 799 { 800 801 sc->flags &= ~(TPRO | TPWO | TPVOL); 802 if (!wtcmd(sc, QIC_READFM)) { 803 wtsense(sc, 1, TP_WRP); 804 return EIO; 805 } 806 sc->flags |= TPRMARK | TPRANY; 807 wtclock(sc); 808 /* Don't wait for completion here. */ 809 return 0; 810 } 811 812 /* 813 * Write marker to the tape. 814 */ 815 static int 816 wtwritefm(struct wt_softc *sc) 817 { 818 819 tsleep((void *)wtwritefm, WTPRI, "wtwfm", hz); 820 sc->flags &= ~(TPRO | TPWO); 821 if (!wtcmd(sc, QIC_WRITEFM)) { 822 wtsense(sc, 1, 0); 823 return EIO; 824 } 825 sc->flags |= TPWMARK | TPWANY; 826 wtclock(sc); 827 return wtwait(sc, 0, "wtwfm"); 828 } 829 830 /* 831 * While controller status & mask == bits continue waiting. 832 */ 833 static u_char 834 wtsoft(struct wt_softc *sc, int mask, int bits) 835 { 836 bus_space_tag_t iot = sc->sc_iot; 837 bus_space_handle_t ioh = sc->sc_ioh; 838 u_char x; 839 int i; 840 841 842 /* Poll status port, waiting for specified bits. */ 843 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 844 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 845 if ((x & mask) != bits) 846 return x; 847 delay(1); 848 } 849 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 850 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 851 if ((x & mask) != bits) 852 return x; 853 delay(100); 854 } 855 for (;;) { /* forever */ 856 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 857 if ((x & mask) != bits) 858 return x; 859 tsleep((void *)wtsoft, WTPRI, "wtsoft", 1); 860 } 861 } 862 863 /* 864 * Execute QIC command. 865 */ 866 static int 867 wtcmd(struct wt_softc *sc, int cmd) 868 { 869 bus_space_tag_t iot = sc->sc_iot; 870 bus_space_handle_t ioh = sc->sc_ioh; 871 u_char x; 872 int s; 873 874 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 875 s = splbio(); 876 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 877 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 878 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 879 splx(s); 880 return 0; 881 } 882 883 /* output the command */ 884 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 885 886 /* set request */ 887 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 888 sc->regs.REQUEST | sc->regs.ONLINE); 889 890 /* wait for ready */ 891 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 892 893 /* reset request */ 894 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 895 sc->regs.IEN | sc->regs.ONLINE); 896 897 /* wait for not ready */ 898 wtsoft(sc, sc->regs.BUSY, 0); 899 splx(s); 900 return 1; 901 } 902 903 /* wait for the end of i/o, seeking marker or rewind operation */ 904 static int 905 wtwait(struct wt_softc *sc, int catch, const char *msg) 906 { 907 int error; 908 909 WTDBPRINT(("wtwait() `%s'\n", msg)); 910 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 911 if ((error = tsleep((void *)sc, WTPRI | catch, msg, 0)) != 0) 912 return error; 913 return 0; 914 } 915 916 /* initialize DMA for the i/o operation */ 917 static void 918 wtdma(struct wt_softc *sc) 919 { 920 bus_space_tag_t iot = sc->sc_iot; 921 bus_space_handle_t ioh = sc->sc_ioh; 922 923 sc->flags |= TPACTIVE; 924 wtclock(sc); 925 926 if (sc->type == ARCHIVE) { 927 /* Set DMA. */ 928 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 929 } 930 931 if ((sc->dmaflags & DMAMODE_READ) && 932 (sc->dmatotal - sc->dmacount) < sc->bsize) { 933 /* Reading short block; do it through the internal buffer. */ 934 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 935 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 936 } else 937 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 938 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 939 } 940 941 /* start i/o operation */ 942 static int 943 wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len) 944 { 945 u_char x; 946 947 WTDBPRINT(("wtstart()\n")); 948 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 949 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 950 if ((x & sc->regs.NOEXCEP) == 0) { 951 sc->flags |= TPEXCEP; /* error */ 952 return 0; 953 } 954 sc->flags &= ~TPEXCEP; /* clear exception flag */ 955 sc->dmavaddr = vaddr; 956 sc->dmatotal = len; 957 sc->dmacount = 0; 958 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 959 wtdma(sc); 960 return 1; 961 } 962 963 /* 964 * Start timer. 965 */ 966 static void 967 wtclock(struct wt_softc *sc) 968 { 969 970 if (sc->flags & TPTIMER) 971 return; 972 sc->flags |= TPTIMER; 973 /* 974 * Some controllers seem to lose DMA interrupts too often. To make the 975 * tape stream we need 1 tick timeout. 976 */ 977 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 978 wttimer, sc); 979 } 980 981 /* 982 * Simulate an interrupt periodically while i/o is going. 983 * This is necessary in case interrupts get eaten due to 984 * multiple devices on a single IRQ line. 985 */ 986 static void 987 wttimer(void *arg) 988 { 989 register struct wt_softc *sc = (struct wt_softc *)arg; 990 int s; 991 u_char status; 992 993 sc->flags &= ~TPTIMER; 994 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 995 return; 996 997 /* If i/o going, simulate interrupt. */ 998 s = splbio(); 999 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 1000 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 1001 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 1002 WTDBPRINT(("wttimer() -- ")); 1003 wtintr(sc); 1004 } 1005 splx(s); 1006 1007 /* Restart timer if i/o pending. */ 1008 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1009 wtclock(sc); 1010 } 1011 1012 /* 1013 * Perform QIC-02 and QIC-36 compatible reset sequence. 1014 */ 1015 static int 1016 wtreset(bus_space_tag_t iot, bus_space_handle_t ioh, struct wtregs *regs) 1017 { 1018 u_char x; 1019 int i; 1020 1021 /* send reset */ 1022 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1023 delay(30); 1024 /* turn off reset */ 1025 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1026 delay(30); 1027 1028 /* Read the controller status. */ 1029 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1030 if (x == 0xff) /* no port at this address? */ 1031 return 0; 1032 1033 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1034 for (i = 0; i < 3000; ++i) { 1035 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1036 break; 1037 delay(1000); 1038 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1039 } 1040 return (x & regs->RESETMASK) == regs->RESETVAL; 1041 } 1042 1043 /* 1044 * Get controller status information. Return 0 if user i/o request should 1045 * receive an i/o error code. 1046 */ 1047 static int 1048 wtsense(struct wt_softc *sc, int verbose, int ignore) 1049 { 1050 const char *msg = 0; 1051 int error; 1052 1053 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1054 sc->flags &= ~(TPRO | TPWO); 1055 if (!wtstatus(sc)) 1056 return 0; 1057 if ((sc->error & TP_ST0) == 0) 1058 sc->error &= ~TP_ST0MASK; 1059 if ((sc->error & TP_ST1) == 0) 1060 sc->error &= ~TP_ST1MASK; 1061 sc->error &= ~ignore; /* ignore certain errors */ 1062 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1063 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1064 if (!error) 1065 return 1; 1066 if (!verbose) 1067 return 0; 1068 1069 /* lifted from tdriver.c from Wangtek */ 1070 if (error & TP_USL) 1071 msg = "Drive not online"; 1072 else if (error & TP_CNI) 1073 msg = "No cartridge"; 1074 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1075 msg = "Tape is write protected"; 1076 sc->flags |= TPWP; 1077 } else if (error & TP_FIL) 1078 msg = 0 /*"Filemark detected"*/; 1079 else if (error & TP_EOM) 1080 msg = 0 /*"End of tape"*/; 1081 else if (error & TP_BNL) 1082 msg = "Block not located"; 1083 else if (error & TP_UDA) 1084 msg = "Unrecoverable data error"; 1085 else if (error & TP_NDT) 1086 msg = "No data detected"; 1087 else if (error & TP_ILL) 1088 msg = "Illegal command"; 1089 if (msg) 1090 printf("%s: %s\n", device_xname(sc->sc_dev), msg); 1091 return 0; 1092 } 1093 1094 /* 1095 * Get controller status information. 1096 */ 1097 static int 1098 wtstatus(struct wt_softc *sc) 1099 { 1100 bus_space_tag_t iot = sc->sc_iot; 1101 bus_space_handle_t ioh = sc->sc_ioh; 1102 char *p; 1103 int s; 1104 1105 s = splbio(); 1106 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1107 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1108 /* send `read status' command */ 1109 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1110 1111 /* set request */ 1112 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1113 sc->regs.REQUEST | sc->regs.ONLINE); 1114 1115 /* wait for ready */ 1116 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1117 /* reset request */ 1118 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1119 1120 /* wait for not ready */ 1121 wtsoft(sc, sc->regs.BUSY, 0); 1122 1123 p = (char *)&sc->error; 1124 while (p < (char *)&sc->error + 6) { 1125 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1126 sc->regs.BUSY | sc->regs.NOEXCEP); 1127 1128 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1129 splx(s); 1130 return 0; 1131 } 1132 1133 /* read status byte */ 1134 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1135 1136 /* set request */ 1137 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1138 sc->regs.REQUEST | sc->regs.ONLINE); 1139 1140 /* wait for not ready */ 1141 wtsoft(sc, sc->regs.BUSY, 0); 1142 1143 /* unset request */ 1144 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1145 } 1146 splx(s); 1147 return 1; 1148 } 1149