1 /* $NetBSD: wt.c,v 1.86 2014/07/25 08:10:37 dholland 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 1.86 2014/07/25 08:10:37 dholland 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 .d_open = wtopen, 162 .d_close = wtclose, 163 .d_strategy = wtstrategy, 164 .d_ioctl = wtioctl, 165 .d_dump = wtdump, 166 .d_psize = wtsize, 167 .d_discard = nodiscard, 168 .d_flag = D_TAPE 169 }; 170 171 const struct cdevsw wt_cdevsw = { 172 .d_open = wtopen, 173 .d_close = wtclose, 174 .d_read = wtread, 175 .d_write = wtwrite, 176 .d_ioctl = wtioctl, 177 .d_stop = nostop, 178 .d_tty = notty, 179 .d_poll = nopoll, 180 .d_mmap = nommap, 181 .d_kqfilter = nokqfilter, 182 .d_discard = nodiscard, 183 .d_flag = D_TAPE 184 }; 185 186 static int wtwait(struct wt_softc *sc, int catch, const char *msg); 187 static int wtcmd(struct wt_softc *sc, int cmd); 188 static int wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len); 189 static void wtdma(struct wt_softc *sc); 190 static void wttimer(void *arg); 191 static void wtclock(struct wt_softc *sc); 192 static int wtreset(bus_space_tag_t, bus_space_handle_t, struct wtregs *); 193 static int wtsense(struct wt_softc *sc, int verbose, int ignore); 194 static int wtstatus(struct wt_softc *sc); 195 static void wtrewind(struct wt_softc *sc); 196 static int wtreadfm(struct wt_softc *sc); 197 static int wtwritefm(struct wt_softc *sc); 198 static u_char wtsoft(struct wt_softc *sc, int mask, int bits); 199 static int wtintr(void *sc); 200 201 int wtprobe(device_t, cfdata_t, void *); 202 void wtattach(device_t, device_t, void *); 203 204 CFATTACH_DECL_NEW(wt, sizeof(struct wt_softc), 205 wtprobe, wtattach, NULL, NULL); 206 207 extern struct cfdriver wt_cd; 208 209 /* 210 * Probe for the presence of the device. 211 */ 212 int 213 wtprobe(device_t parent, cfdata_t match, void *aux) 214 { 215 struct isa_attach_args *ia = aux; 216 bus_space_tag_t iot = ia->ia_iot; 217 bus_space_handle_t ioh; 218 int rv = 0, iosize; 219 220 if (ia->ia_nio < 1) 221 return (0); 222 if (ia->ia_nirq < 1) 223 return (0); 224 if (ia->ia_ndrq < 1) 225 return (0); 226 227 /* Disallow wildcarded i/o address. */ 228 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 229 return (0); 230 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 231 return (0); 232 233 if (ia->ia_drq[0].ir_drq < 1 || ia->ia_drq[0].ir_drq > 3) { 234 printf("wtprobe: Bad drq=%d, should be 1..3\n", 235 ia->ia_drq[0].ir_drq); 236 return (0); 237 } 238 239 iosize = AV_NPORT; 240 241 /* Map i/o space */ 242 if (bus_space_map(iot, ia->ia_io[0].ir_addr, iosize, 0, &ioh)) 243 return 0; 244 245 /* Try Wangtek. */ 246 if (wtreset(iot, ioh, &wtregs)) { 247 iosize = WT_NPORT; /* XXX misleading */ 248 rv = 1; 249 goto done; 250 } 251 252 /* Try Archive. */ 253 if (wtreset(iot, ioh, &avregs)) { 254 iosize = AV_NPORT; 255 rv = 1; 256 goto done; 257 } 258 259 done: 260 if (rv) { 261 ia->ia_nio = 1; 262 ia->ia_io[0].ir_size = iosize; 263 264 ia->ia_nirq = 1; 265 ia->ia_ndrq = 1; 266 267 ia->ia_niomem = 0; 268 } 269 bus_space_unmap(iot, ioh, AV_NPORT); 270 return rv; 271 } 272 273 /* 274 * Device is found, configure it. 275 */ 276 void 277 wtattach(device_t parent, device_t self, void *aux) 278 { 279 struct wt_softc *sc = device_private(self); 280 struct isa_attach_args *ia = aux; 281 bus_space_tag_t iot = ia->ia_iot; 282 bus_space_handle_t ioh; 283 bus_size_t maxsize; 284 285 sc->sc_dev = self; 286 287 /* Map i/o space */ 288 if (bus_space_map(iot, ia->ia_io[0].ir_addr, AV_NPORT, 0, &ioh)) { 289 printf(": can't map i/o space\n"); 290 return; 291 } 292 293 sc->sc_iot = iot; 294 sc->sc_ioh = ioh; 295 sc->sc_ic = ia->ia_ic; 296 297 callout_init(&sc->sc_timer_ch, 0); 298 299 /* Try Wangtek. */ 300 if (wtreset(iot, ioh, &wtregs)) { 301 sc->type = WANGTEK; 302 memcpy(&sc->regs, &wtregs, sizeof(sc->regs)); 303 printf(": type <Wangtek>\n"); 304 goto ok; 305 } 306 307 /* Try Archive. */ 308 if (wtreset(iot, ioh, &avregs)) { 309 sc->type = ARCHIVE; 310 memcpy(&sc->regs, &avregs, sizeof(sc->regs)); 311 printf(": type <Archive>\n"); 312 /* Reset DMA. */ 313 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 314 goto ok; 315 } 316 317 /* what happened? */ 318 aprint_error_dev(self, "lost controller\n"); 319 return; 320 321 ok: 322 sc->flags = TPSTART; /* tape is rewound */ 323 sc->dens = -1; /* unknown density */ 324 325 sc->chan = ia->ia_drq[0].ir_drq; 326 327 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->chan)) < MAXPHYS) { 328 aprint_error_dev(sc->sc_dev, "max DMA size %lu is less than required %d\n", 329 (u_long)maxsize, MAXPHYS); 330 return; 331 } 332 333 if (isa_drq_alloc(sc->sc_ic, sc->chan) != 0) { 334 aprint_error_dev(sc->sc_dev, "can't reserve drq %d\n", 335 sc->chan); 336 return; 337 } 338 339 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 340 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 341 aprint_error_dev(sc->sc_dev, "can't set up ISA DMA map\n"); 342 return; 343 } 344 345 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 346 IST_EDGE, IPL_BIO, wtintr, sc); 347 } 348 349 static int 350 wtdump(dev_t dev, daddr_t blkno, void *va, 351 size_t size) 352 { 353 354 /* Not implemented. */ 355 return ENXIO; 356 } 357 358 static int 359 wtsize(dev_t dev) 360 { 361 362 /* Not implemented. */ 363 return -1; 364 } 365 366 /* 367 * Open routine, called on every device open. 368 */ 369 static int 370 wtopen(dev_t dev, int flag, int mode, struct lwp *l) 371 { 372 int unit = minor(dev) & T_UNIT; 373 struct wt_softc *sc; 374 int error; 375 376 sc = device_lookup_private(&wt_cd, unit); 377 if (sc == NULL) 378 return (ENXIO); 379 380 /* Check that device is not in use */ 381 if (sc->flags & TPINUSE) 382 return EBUSY; 383 384 /* If the tape is in rewound state, check the status and set density. */ 385 if (sc->flags & TPSTART) { 386 /* If rewind is going on, wait */ 387 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 388 return error; 389 390 /* Check the controller status */ 391 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 392 /* Bad status, reset the controller. */ 393 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 394 return EIO; 395 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 396 return EIO; 397 } 398 399 /* Set up tape density. */ 400 if (sc->dens != (minor(dev) & WT_DENSEL)) { 401 int d = 0; 402 403 switch (minor(dev) & WT_DENSEL) { 404 case WT_DENSDFLT: 405 default: 406 break; /* default density */ 407 case WT_QIC11: 408 d = QIC_FMT11; break; /* minor 010 */ 409 case WT_QIC24: 410 d = QIC_FMT24; break; /* minor 020 */ 411 case WT_QIC120: 412 d = QIC_FMT120; break; /* minor 030 */ 413 case WT_QIC150: 414 d = QIC_FMT150; break; /* minor 040 */ 415 case WT_QIC300: 416 d = QIC_FMT300; break; /* minor 050 */ 417 case WT_QIC600: 418 d = QIC_FMT600; break; /* minor 060 */ 419 } 420 if (d) { 421 /* Change tape density. */ 422 if (!wtcmd(sc, d)) 423 return EIO; 424 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 425 return EIO; 426 427 /* Check the status of the controller. */ 428 if (sc->error & TP_ILL) { 429 aprint_error_dev(sc->sc_dev, "invalid tape density\n"); 430 return ENODEV; 431 } 432 } 433 sc->dens = minor(dev) & WT_DENSEL; 434 } 435 sc->flags &= ~TPSTART; 436 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 437 return ENXIO; 438 439 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 440 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 441 442 sc->flags = TPINUSE; 443 if (flag & FREAD) 444 sc->flags |= TPREAD; 445 if (flag & FWRITE) 446 sc->flags |= TPWRITE; 447 return 0; 448 } 449 450 /* 451 * Close routine, called on last device close. 452 */ 453 static int 454 wtclose(dev_t dev, int flags, int mode, 455 struct lwp *l) 456 { 457 struct wt_softc *sc; 458 459 sc = device_lookup_private(&wt_cd, minor(dev) & T_UNIT); 460 461 /* If rewind is pending, do nothing */ 462 if (sc->flags & TPREW) 463 goto done; 464 465 /* If seek forward is pending and no rewind on close, do nothing */ 466 if (sc->flags & TPRMARK) { 467 if (minor(dev) & T_NOREWIND) 468 goto done; 469 470 /* If read file mark is going on, wait */ 471 wtwait(sc, 0, "wtrfm"); 472 } 473 474 if (sc->flags & TPWANY) { 475 /* Tape was written. Write file mark. */ 476 wtwritefm(sc); 477 } 478 479 if ((minor(dev) & T_NOREWIND) == 0) { 480 /* Rewind to beginning of tape. */ 481 /* Don't wait until rewind, though. */ 482 wtrewind(sc); 483 goto done; 484 } 485 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 486 /* Space forward to after next file mark if no writing done. */ 487 /* Don't wait for completion. */ 488 wtreadfm(sc); 489 } 490 491 done: 492 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 493 free(sc->buf, M_TEMP); 494 return 0; 495 } 496 497 /* 498 * Ioctl routine. Compatible with BSD ioctls. 499 * Direct QIC-02 commands ERASE and RETENSION added. 500 * There are three possible ioctls: 501 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 502 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 503 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 504 */ 505 static int 506 wtioctl(dev_t dev, unsigned long cmd, void *addr, int flag, 507 struct lwp *l) 508 { 509 struct wt_softc *sc; 510 int error, count, op; 511 512 sc = device_lookup_private(&wt_cd, minor(dev) & T_UNIT); 513 514 switch (cmd) { 515 default: 516 return EINVAL; 517 case WTQICMD: /* direct QIC command */ 518 op = *(int *)addr; 519 switch (op) { 520 default: 521 return EINVAL; 522 case QIC_ERASE: /* erase the whole tape */ 523 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 524 return EACCES; 525 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 526 return error; 527 break; 528 case QIC_RETENS: /* retension the tape */ 529 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 530 return error; 531 break; 532 } 533 /* Both ERASE and RETENS operations work like REWIND. */ 534 /* Simulate the rewind operation here. */ 535 sc->flags &= ~(TPRO | TPWO | TPVOL); 536 if (!wtcmd(sc, op)) 537 return EIO; 538 sc->flags |= TPSTART | TPREW; 539 if (op == QIC_ERASE) 540 sc->flags |= TPWANY; 541 wtclock(sc); 542 return 0; 543 case MTIOCIEOT: /* ignore EOT errors */ 544 case MTIOCEEOT: /* enable EOT errors */ 545 return 0; 546 case MTIOCGET: 547 ((struct mtget*)addr)->mt_type = 548 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 549 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 550 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 551 ((struct mtget*)addr)->mt_resid = 0; 552 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 553 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 554 return 0; 555 case MTIOCTOP: 556 break; 557 } 558 559 switch ((short)((struct mtop*)addr)->mt_op) { 560 default: 561 #if 0 562 case MTFSR: /* forward space record */ 563 case MTBSR: /* backward space record */ 564 case MTBSF: /* backward space file */ 565 #endif 566 return EINVAL; 567 case MTNOP: /* no operation, sets status only */ 568 case MTCACHE: /* enable controller cache */ 569 case MTNOCACHE: /* disable controller cache */ 570 return 0; 571 case MTREW: /* rewind */ 572 case MTOFFL: /* rewind and put the drive offline */ 573 if (sc->flags & TPREW) /* rewind is running */ 574 return 0; 575 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 576 return error; 577 wtrewind(sc); 578 return 0; 579 case MTFSF: /* forward space file */ 580 for (count = ((struct mtop*)addr)->mt_count; count > 0; 581 --count) { 582 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 583 return error; 584 if ((error = wtreadfm(sc)) != 0) 585 return error; 586 } 587 return 0; 588 case MTWEOF: /* write an end-of-file record */ 589 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 590 return EACCES; 591 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 592 return error; 593 if ((error = wtwritefm(sc)) != 0) 594 return error; 595 return 0; 596 } 597 598 #ifdef DIAGNOSTIC 599 panic("wtioctl: impossible"); 600 #endif 601 } 602 603 /* 604 * Strategy routine. 605 */ 606 static void 607 wtstrategy(struct buf *bp) 608 { 609 struct wt_softc *sc; 610 int s; 611 612 sc = device_lookup_private(&wt_cd, minor(bp->b_dev) & T_UNIT); 613 614 bp->b_resid = bp->b_bcount; 615 616 /* at file marks and end of tape, we just return '0 bytes available' */ 617 if (sc->flags & TPVOL) 618 goto xit; 619 620 if (bp->b_flags & B_READ) { 621 /* Check read access and no previous write to this tape. */ 622 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 623 goto errxit; 624 625 /* For now, we assume that all data will be copied out */ 626 /* If read command outstanding, just skip down */ 627 if ((sc->flags & TPRO) == 0) { 628 if (!wtsense(sc, 1, TP_WRP)) { 629 /* Clear status. */ 630 goto errxit; 631 } 632 if (!wtcmd(sc, QIC_RDDATA)) { 633 /* Set read mode. */ 634 wtsense(sc, 1, TP_WRP); 635 goto errxit; 636 } 637 sc->flags |= TPRO | TPRANY; 638 } 639 } else { 640 /* Check write access and write protection. */ 641 /* No previous read from this tape allowed. */ 642 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 643 goto errxit; 644 645 /* If write command outstanding, just skip down */ 646 if ((sc->flags & TPWO) == 0) { 647 if (!wtsense(sc, 1, 0)) { 648 /* Clear status. */ 649 goto errxit; 650 } 651 if (!wtcmd(sc, QIC_WRTDATA)) { 652 /* Set write mode. */ 653 wtsense(sc, 1, 0); 654 goto errxit; 655 } 656 sc->flags |= TPWO | TPWANY; 657 } 658 } 659 660 if (bp->b_bcount == 0) 661 goto xit; 662 663 sc->flags &= ~TPEXCEP; 664 s = splbio(); 665 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 666 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 667 bp->b_resid -= sc->dmacount; 668 } 669 splx(s); 670 671 if (sc->flags & TPEXCEP) { 672 errxit: 673 bp->b_error = EIO; 674 } 675 xit: 676 biodone(bp); 677 return; 678 } 679 680 static int 681 wtread(dev_t dev, struct uio *uio, int flags) 682 { 683 684 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 685 } 686 687 static int 688 wtwrite(dev_t dev, struct uio *uio, int flags) 689 { 690 691 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 692 } 693 694 /* 695 * Interrupt routine. 696 */ 697 static int 698 wtintr(void *arg) 699 { 700 struct wt_softc *sc = arg; 701 u_char x; 702 703 /* get status */ 704 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 705 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 706 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 707 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 708 WTDBPRINT(("busy\n")); 709 return 0; /* device is busy */ 710 } 711 712 /* 713 * Check if rewind finished. 714 */ 715 if (sc->flags & TPREW) { 716 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 717 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 718 "rewind busy?\n" : "rewind finished\n")); 719 sc->flags &= ~TPREW; /* rewind finished */ 720 wtsense(sc, 1, TP_WRP); 721 wakeup((void *)sc); 722 return 1; 723 } 724 725 /* 726 * Check if writing/reading of file mark finished. 727 */ 728 if (sc->flags & (TPRMARK | TPWMARK)) { 729 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 730 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 731 "marker r/w busy?\n" : "marker r/w finished\n")); 732 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 733 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 734 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 735 wakeup((void *)sc); 736 return 1; 737 } 738 739 /* 740 * Do we started any i/o? If no, just return. 741 */ 742 if ((sc->flags & TPACTIVE) == 0) { 743 WTDBPRINT(("unexpected interrupt\n")); 744 return 0; 745 } 746 sc->flags &= ~TPACTIVE; 747 sc->dmacount += sc->bsize; /* increment counter */ 748 749 /* 750 * Clean up DMA. 751 */ 752 if ((sc->dmaflags & DMAMODE_READ) && 753 (sc->dmatotal - sc->dmacount) < sc->bsize) { 754 /* If reading short block, copy the internal buffer 755 * to the user memory. */ 756 isa_dmadone(sc->sc_ic, sc->chan); 757 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 758 } else 759 isa_dmadone(sc->sc_ic, sc->chan); 760 761 /* 762 * On exception, check for end of file and end of volume. 763 */ 764 if ((x & sc->regs.NOEXCEP) == 0) { 765 WTDBPRINT(("i/o exception\n")); 766 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 767 if (sc->error & (TP_EOM | TP_FIL)) 768 sc->flags |= TPVOL; /* end of file */ 769 else 770 sc->flags |= TPEXCEP; /* i/o error */ 771 wakeup((void *)sc); 772 return 1; 773 } 774 775 if (sc->dmacount < sc->dmatotal) { 776 /* Continue I/O. */ 777 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 778 wtdma(sc); 779 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 780 return 1; 781 } 782 if (sc->dmacount > sc->dmatotal) /* short last block */ 783 sc->dmacount = sc->dmatotal; 784 /* Wake up user level. */ 785 wakeup((void *)sc); 786 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 787 return 1; 788 } 789 790 /* start the rewind operation */ 791 static void 792 wtrewind(struct wt_softc *sc) 793 { 794 int rwmode = sc->flags & (TPRO | TPWO); 795 796 sc->flags &= ~(TPRO | TPWO | TPVOL); 797 /* 798 * Wangtek strictly follows QIC-02 standard: 799 * clearing ONLINE in read/write modes causes rewind. 800 * REWIND command is not allowed in read/write mode 801 * and gives `illegal command' error. 802 */ 803 if (sc->type == WANGTEK && rwmode) { 804 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 805 } else if (!wtcmd(sc, QIC_REWIND)) 806 return; 807 sc->flags |= TPSTART | TPREW; 808 wtclock(sc); 809 } 810 811 /* 812 * Start the `read marker' operation. 813 */ 814 static int 815 wtreadfm(struct wt_softc *sc) 816 { 817 818 sc->flags &= ~(TPRO | TPWO | TPVOL); 819 if (!wtcmd(sc, QIC_READFM)) { 820 wtsense(sc, 1, TP_WRP); 821 return EIO; 822 } 823 sc->flags |= TPRMARK | TPRANY; 824 wtclock(sc); 825 /* Don't wait for completion here. */ 826 return 0; 827 } 828 829 /* 830 * Write marker to the tape. 831 */ 832 static int 833 wtwritefm(struct wt_softc *sc) 834 { 835 836 tsleep((void *)wtwritefm, WTPRI, "wtwfm", hz); 837 sc->flags &= ~(TPRO | TPWO); 838 if (!wtcmd(sc, QIC_WRITEFM)) { 839 wtsense(sc, 1, 0); 840 return EIO; 841 } 842 sc->flags |= TPWMARK | TPWANY; 843 wtclock(sc); 844 return wtwait(sc, 0, "wtwfm"); 845 } 846 847 /* 848 * While controller status & mask == bits continue waiting. 849 */ 850 static u_char 851 wtsoft(struct wt_softc *sc, int mask, int bits) 852 { 853 bus_space_tag_t iot = sc->sc_iot; 854 bus_space_handle_t ioh = sc->sc_ioh; 855 u_char x; 856 int i; 857 858 859 /* Poll status port, waiting for specified bits. */ 860 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 861 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 862 if ((x & mask) != bits) 863 return x; 864 delay(1); 865 } 866 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 867 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 868 if ((x & mask) != bits) 869 return x; 870 delay(100); 871 } 872 for (;;) { /* forever */ 873 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 874 if ((x & mask) != bits) 875 return x; 876 tsleep((void *)wtsoft, WTPRI, "wtsoft", 1); 877 } 878 } 879 880 /* 881 * Execute QIC command. 882 */ 883 static int 884 wtcmd(struct wt_softc *sc, int cmd) 885 { 886 bus_space_tag_t iot = sc->sc_iot; 887 bus_space_handle_t ioh = sc->sc_ioh; 888 u_char x; 889 int s; 890 891 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 892 s = splbio(); 893 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 894 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 895 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 896 splx(s); 897 return 0; 898 } 899 900 /* output the command */ 901 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 902 903 /* set request */ 904 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 905 sc->regs.REQUEST | sc->regs.ONLINE); 906 907 /* wait for ready */ 908 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 909 910 /* reset request */ 911 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 912 sc->regs.IEN | sc->regs.ONLINE); 913 914 /* wait for not ready */ 915 wtsoft(sc, sc->regs.BUSY, 0); 916 splx(s); 917 return 1; 918 } 919 920 /* wait for the end of i/o, seeking marker or rewind operation */ 921 static int 922 wtwait(struct wt_softc *sc, int catch, const char *msg) 923 { 924 int error; 925 926 WTDBPRINT(("wtwait() `%s'\n", msg)); 927 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 928 if ((error = tsleep((void *)sc, WTPRI | catch, msg, 0)) != 0) 929 return error; 930 return 0; 931 } 932 933 /* initialize DMA for the i/o operation */ 934 static void 935 wtdma(struct wt_softc *sc) 936 { 937 bus_space_tag_t iot = sc->sc_iot; 938 bus_space_handle_t ioh = sc->sc_ioh; 939 940 sc->flags |= TPACTIVE; 941 wtclock(sc); 942 943 if (sc->type == ARCHIVE) { 944 /* Set DMA. */ 945 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 946 } 947 948 if ((sc->dmaflags & DMAMODE_READ) && 949 (sc->dmatotal - sc->dmacount) < sc->bsize) { 950 /* Reading short block; do it through the internal buffer. */ 951 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 952 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 953 } else 954 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 955 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 956 } 957 958 /* start i/o operation */ 959 static int 960 wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len) 961 { 962 u_char x; 963 964 WTDBPRINT(("wtstart()\n")); 965 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 966 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 967 if ((x & sc->regs.NOEXCEP) == 0) { 968 sc->flags |= TPEXCEP; /* error */ 969 return 0; 970 } 971 sc->flags &= ~TPEXCEP; /* clear exception flag */ 972 sc->dmavaddr = vaddr; 973 sc->dmatotal = len; 974 sc->dmacount = 0; 975 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 976 wtdma(sc); 977 return 1; 978 } 979 980 /* 981 * Start timer. 982 */ 983 static void 984 wtclock(struct wt_softc *sc) 985 { 986 987 if (sc->flags & TPTIMER) 988 return; 989 sc->flags |= TPTIMER; 990 /* 991 * Some controllers seem to lose DMA interrupts too often. To make the 992 * tape stream we need 1 tick timeout. 993 */ 994 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 995 wttimer, sc); 996 } 997 998 /* 999 * Simulate an interrupt periodically while i/o is going. 1000 * This is necessary in case interrupts get eaten due to 1001 * multiple devices on a single IRQ line. 1002 */ 1003 static void 1004 wttimer(void *arg) 1005 { 1006 register struct wt_softc *sc = (struct wt_softc *)arg; 1007 int s; 1008 u_char status; 1009 1010 sc->flags &= ~TPTIMER; 1011 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 1012 return; 1013 1014 /* If i/o going, simulate interrupt. */ 1015 s = splbio(); 1016 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 1017 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 1018 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 1019 WTDBPRINT(("wttimer() -- ")); 1020 wtintr(sc); 1021 } 1022 splx(s); 1023 1024 /* Restart timer if i/o pending. */ 1025 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1026 wtclock(sc); 1027 } 1028 1029 /* 1030 * Perform QIC-02 and QIC-36 compatible reset sequence. 1031 */ 1032 static int 1033 wtreset(bus_space_tag_t iot, bus_space_handle_t ioh, struct wtregs *regs) 1034 { 1035 u_char x; 1036 int i; 1037 1038 /* send reset */ 1039 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1040 delay(30); 1041 /* turn off reset */ 1042 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1043 delay(30); 1044 1045 /* Read the controller status. */ 1046 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1047 if (x == 0xff) /* no port at this address? */ 1048 return 0; 1049 1050 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1051 for (i = 0; i < 3000; ++i) { 1052 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1053 break; 1054 delay(1000); 1055 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1056 } 1057 return (x & regs->RESETMASK) == regs->RESETVAL; 1058 } 1059 1060 /* 1061 * Get controller status information. Return 0 if user i/o request should 1062 * receive an i/o error code. 1063 */ 1064 static int 1065 wtsense(struct wt_softc *sc, int verbose, int ignore) 1066 { 1067 const char *msg = 0; 1068 int error; 1069 1070 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1071 sc->flags &= ~(TPRO | TPWO); 1072 if (!wtstatus(sc)) 1073 return 0; 1074 if ((sc->error & TP_ST0) == 0) 1075 sc->error &= ~TP_ST0MASK; 1076 if ((sc->error & TP_ST1) == 0) 1077 sc->error &= ~TP_ST1MASK; 1078 sc->error &= ~ignore; /* ignore certain errors */ 1079 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1080 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1081 if (!error) 1082 return 1; 1083 if (!verbose) 1084 return 0; 1085 1086 /* lifted from tdriver.c from Wangtek */ 1087 if (error & TP_USL) 1088 msg = "Drive not online"; 1089 else if (error & TP_CNI) 1090 msg = "No cartridge"; 1091 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1092 msg = "Tape is write protected"; 1093 sc->flags |= TPWP; 1094 } else if (error & TP_FIL) 1095 msg = 0 /*"Filemark detected"*/; 1096 else if (error & TP_EOM) 1097 msg = 0 /*"End of tape"*/; 1098 else if (error & TP_BNL) 1099 msg = "Block not located"; 1100 else if (error & TP_UDA) 1101 msg = "Unrecoverable data error"; 1102 else if (error & TP_NDT) 1103 msg = "No data detected"; 1104 else if (error & TP_ILL) 1105 msg = "Illegal command"; 1106 if (msg) 1107 printf("%s: %s\n", device_xname(sc->sc_dev), msg); 1108 return 0; 1109 } 1110 1111 /* 1112 * Get controller status information. 1113 */ 1114 static int 1115 wtstatus(struct wt_softc *sc) 1116 { 1117 bus_space_tag_t iot = sc->sc_iot; 1118 bus_space_handle_t ioh = sc->sc_ioh; 1119 char *p; 1120 int s; 1121 1122 s = splbio(); 1123 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1124 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1125 /* send `read status' command */ 1126 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1127 1128 /* set request */ 1129 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1130 sc->regs.REQUEST | sc->regs.ONLINE); 1131 1132 /* wait for ready */ 1133 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1134 /* reset request */ 1135 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1136 1137 /* wait for not ready */ 1138 wtsoft(sc, sc->regs.BUSY, 0); 1139 1140 p = (char *)&sc->error; 1141 while (p < (char *)&sc->error + 6) { 1142 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1143 sc->regs.BUSY | sc->regs.NOEXCEP); 1144 1145 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1146 splx(s); 1147 return 0; 1148 } 1149 1150 /* read status byte */ 1151 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1152 1153 /* set request */ 1154 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1155 sc->regs.REQUEST | sc->regs.ONLINE); 1156 1157 /* wait for not ready */ 1158 wtsoft(sc, sc->regs.BUSY, 0); 1159 1160 /* unset request */ 1161 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1162 } 1163 splx(s); 1164 return 1; 1165 } 1166