1 /* $NetBSD: wt.c,v 1.84 2014/03/16 05:20:28 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 1.84 2014/03/16 05:20:28 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_flag = D_TAPE 168 }; 169 170 const struct cdevsw wt_cdevsw = { 171 .d_open = wtopen, 172 .d_close = wtclose, 173 .d_read = wtread, 174 .d_write = wtwrite, 175 .d_ioctl = wtioctl, 176 .d_stop = nostop, 177 .d_tty = notty, 178 .d_poll = nopoll, 179 .d_mmap = nommap, 180 .d_kqfilter = nokqfilter, 181 .d_flag = D_TAPE 182 }; 183 184 static int wtwait(struct wt_softc *sc, int catch, const char *msg); 185 static int wtcmd(struct wt_softc *sc, int cmd); 186 static int wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len); 187 static void wtdma(struct wt_softc *sc); 188 static void wttimer(void *arg); 189 static void wtclock(struct wt_softc *sc); 190 static int wtreset(bus_space_tag_t, bus_space_handle_t, struct wtregs *); 191 static int wtsense(struct wt_softc *sc, int verbose, int ignore); 192 static int wtstatus(struct wt_softc *sc); 193 static void wtrewind(struct wt_softc *sc); 194 static int wtreadfm(struct wt_softc *sc); 195 static int wtwritefm(struct wt_softc *sc); 196 static u_char wtsoft(struct wt_softc *sc, int mask, int bits); 197 static int wtintr(void *sc); 198 199 int wtprobe(device_t, cfdata_t, void *); 200 void wtattach(device_t, device_t, void *); 201 202 CFATTACH_DECL_NEW(wt, sizeof(struct wt_softc), 203 wtprobe, wtattach, NULL, NULL); 204 205 extern struct cfdriver wt_cd; 206 207 /* 208 * Probe for the presence of the device. 209 */ 210 int 211 wtprobe(device_t parent, cfdata_t match, void *aux) 212 { 213 struct isa_attach_args *ia = aux; 214 bus_space_tag_t iot = ia->ia_iot; 215 bus_space_handle_t ioh; 216 int rv = 0, iosize; 217 218 if (ia->ia_nio < 1) 219 return (0); 220 if (ia->ia_nirq < 1) 221 return (0); 222 if (ia->ia_ndrq < 1) 223 return (0); 224 225 /* Disallow wildcarded i/o address. */ 226 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 227 return (0); 228 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 229 return (0); 230 231 if (ia->ia_drq[0].ir_drq < 1 || ia->ia_drq[0].ir_drq > 3) { 232 printf("wtprobe: Bad drq=%d, should be 1..3\n", 233 ia->ia_drq[0].ir_drq); 234 return (0); 235 } 236 237 iosize = AV_NPORT; 238 239 /* Map i/o space */ 240 if (bus_space_map(iot, ia->ia_io[0].ir_addr, iosize, 0, &ioh)) 241 return 0; 242 243 /* Try Wangtek. */ 244 if (wtreset(iot, ioh, &wtregs)) { 245 iosize = WT_NPORT; /* XXX misleading */ 246 rv = 1; 247 goto done; 248 } 249 250 /* Try Archive. */ 251 if (wtreset(iot, ioh, &avregs)) { 252 iosize = AV_NPORT; 253 rv = 1; 254 goto done; 255 } 256 257 done: 258 if (rv) { 259 ia->ia_nio = 1; 260 ia->ia_io[0].ir_size = iosize; 261 262 ia->ia_nirq = 1; 263 ia->ia_ndrq = 1; 264 265 ia->ia_niomem = 0; 266 } 267 bus_space_unmap(iot, ioh, AV_NPORT); 268 return rv; 269 } 270 271 /* 272 * Device is found, configure it. 273 */ 274 void 275 wtattach(device_t parent, device_t self, void *aux) 276 { 277 struct wt_softc *sc = device_private(self); 278 struct isa_attach_args *ia = aux; 279 bus_space_tag_t iot = ia->ia_iot; 280 bus_space_handle_t ioh; 281 bus_size_t maxsize; 282 283 sc->sc_dev = self; 284 285 /* Map i/o space */ 286 if (bus_space_map(iot, ia->ia_io[0].ir_addr, AV_NPORT, 0, &ioh)) { 287 printf(": can't map i/o space\n"); 288 return; 289 } 290 291 sc->sc_iot = iot; 292 sc->sc_ioh = ioh; 293 sc->sc_ic = ia->ia_ic; 294 295 callout_init(&sc->sc_timer_ch, 0); 296 297 /* Try Wangtek. */ 298 if (wtreset(iot, ioh, &wtregs)) { 299 sc->type = WANGTEK; 300 memcpy(&sc->regs, &wtregs, sizeof(sc->regs)); 301 printf(": type <Wangtek>\n"); 302 goto ok; 303 } 304 305 /* Try Archive. */ 306 if (wtreset(iot, ioh, &avregs)) { 307 sc->type = ARCHIVE; 308 memcpy(&sc->regs, &avregs, sizeof(sc->regs)); 309 printf(": type <Archive>\n"); 310 /* Reset DMA. */ 311 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 312 goto ok; 313 } 314 315 /* what happened? */ 316 aprint_error_dev(self, "lost controller\n"); 317 return; 318 319 ok: 320 sc->flags = TPSTART; /* tape is rewound */ 321 sc->dens = -1; /* unknown density */ 322 323 sc->chan = ia->ia_drq[0].ir_drq; 324 325 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->chan)) < MAXPHYS) { 326 aprint_error_dev(sc->sc_dev, "max DMA size %lu is less than required %d\n", 327 (u_long)maxsize, MAXPHYS); 328 return; 329 } 330 331 if (isa_drq_alloc(sc->sc_ic, sc->chan) != 0) { 332 aprint_error_dev(sc->sc_dev, "can't reserve drq %d\n", 333 sc->chan); 334 return; 335 } 336 337 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 338 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 339 aprint_error_dev(sc->sc_dev, "can't set up ISA DMA map\n"); 340 return; 341 } 342 343 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 344 IST_EDGE, IPL_BIO, wtintr, sc); 345 } 346 347 static int 348 wtdump(dev_t dev, daddr_t blkno, void *va, 349 size_t size) 350 { 351 352 /* Not implemented. */ 353 return ENXIO; 354 } 355 356 static int 357 wtsize(dev_t dev) 358 { 359 360 /* Not implemented. */ 361 return -1; 362 } 363 364 /* 365 * Open routine, called on every device open. 366 */ 367 static int 368 wtopen(dev_t dev, int flag, int mode, struct lwp *l) 369 { 370 int unit = minor(dev) & T_UNIT; 371 struct wt_softc *sc; 372 int error; 373 374 sc = device_lookup_private(&wt_cd, unit); 375 if (sc == NULL) 376 return (ENXIO); 377 378 /* Check that device is not in use */ 379 if (sc->flags & TPINUSE) 380 return EBUSY; 381 382 /* If the tape is in rewound state, check the status and set density. */ 383 if (sc->flags & TPSTART) { 384 /* If rewind is going on, wait */ 385 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 386 return error; 387 388 /* Check the controller status */ 389 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 390 /* Bad status, reset the controller. */ 391 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 392 return EIO; 393 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 394 return EIO; 395 } 396 397 /* Set up tape density. */ 398 if (sc->dens != (minor(dev) & WT_DENSEL)) { 399 int d = 0; 400 401 switch (minor(dev) & WT_DENSEL) { 402 case WT_DENSDFLT: 403 default: 404 break; /* default density */ 405 case WT_QIC11: 406 d = QIC_FMT11; break; /* minor 010 */ 407 case WT_QIC24: 408 d = QIC_FMT24; break; /* minor 020 */ 409 case WT_QIC120: 410 d = QIC_FMT120; break; /* minor 030 */ 411 case WT_QIC150: 412 d = QIC_FMT150; break; /* minor 040 */ 413 case WT_QIC300: 414 d = QIC_FMT300; break; /* minor 050 */ 415 case WT_QIC600: 416 d = QIC_FMT600; break; /* minor 060 */ 417 } 418 if (d) { 419 /* Change tape density. */ 420 if (!wtcmd(sc, d)) 421 return EIO; 422 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 423 return EIO; 424 425 /* Check the status of the controller. */ 426 if (sc->error & TP_ILL) { 427 aprint_error_dev(sc->sc_dev, "invalid tape density\n"); 428 return ENODEV; 429 } 430 } 431 sc->dens = minor(dev) & WT_DENSEL; 432 } 433 sc->flags &= ~TPSTART; 434 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 435 return ENXIO; 436 437 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 438 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 439 440 sc->flags = TPINUSE; 441 if (flag & FREAD) 442 sc->flags |= TPREAD; 443 if (flag & FWRITE) 444 sc->flags |= TPWRITE; 445 return 0; 446 } 447 448 /* 449 * Close routine, called on last device close. 450 */ 451 static int 452 wtclose(dev_t dev, int flags, int mode, 453 struct lwp *l) 454 { 455 struct wt_softc *sc; 456 457 sc = device_lookup_private(&wt_cd, minor(dev) & T_UNIT); 458 459 /* If rewind is pending, do nothing */ 460 if (sc->flags & TPREW) 461 goto done; 462 463 /* If seek forward is pending and no rewind on close, do nothing */ 464 if (sc->flags & TPRMARK) { 465 if (minor(dev) & T_NOREWIND) 466 goto done; 467 468 /* If read file mark is going on, wait */ 469 wtwait(sc, 0, "wtrfm"); 470 } 471 472 if (sc->flags & TPWANY) { 473 /* Tape was written. Write file mark. */ 474 wtwritefm(sc); 475 } 476 477 if ((minor(dev) & T_NOREWIND) == 0) { 478 /* Rewind to beginning of tape. */ 479 /* Don't wait until rewind, though. */ 480 wtrewind(sc); 481 goto done; 482 } 483 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 484 /* Space forward to after next file mark if no writing done. */ 485 /* Don't wait for completion. */ 486 wtreadfm(sc); 487 } 488 489 done: 490 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 491 free(sc->buf, M_TEMP); 492 return 0; 493 } 494 495 /* 496 * Ioctl routine. Compatible with BSD ioctls. 497 * Direct QIC-02 commands ERASE and RETENSION added. 498 * There are three possible ioctls: 499 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 500 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 501 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 502 */ 503 static int 504 wtioctl(dev_t dev, unsigned long cmd, void *addr, int flag, 505 struct lwp *l) 506 { 507 struct wt_softc *sc; 508 int error, count, op; 509 510 sc = device_lookup_private(&wt_cd, minor(dev) & T_UNIT); 511 512 switch (cmd) { 513 default: 514 return EINVAL; 515 case WTQICMD: /* direct QIC command */ 516 op = *(int *)addr; 517 switch (op) { 518 default: 519 return EINVAL; 520 case QIC_ERASE: /* erase the whole tape */ 521 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 522 return EACCES; 523 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 524 return error; 525 break; 526 case QIC_RETENS: /* retension the tape */ 527 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 528 return error; 529 break; 530 } 531 /* Both ERASE and RETENS operations work like REWIND. */ 532 /* Simulate the rewind operation here. */ 533 sc->flags &= ~(TPRO | TPWO | TPVOL); 534 if (!wtcmd(sc, op)) 535 return EIO; 536 sc->flags |= TPSTART | TPREW; 537 if (op == QIC_ERASE) 538 sc->flags |= TPWANY; 539 wtclock(sc); 540 return 0; 541 case MTIOCIEOT: /* ignore EOT errors */ 542 case MTIOCEEOT: /* enable EOT errors */ 543 return 0; 544 case MTIOCGET: 545 ((struct mtget*)addr)->mt_type = 546 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 547 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 548 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 549 ((struct mtget*)addr)->mt_resid = 0; 550 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 551 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 552 return 0; 553 case MTIOCTOP: 554 break; 555 } 556 557 switch ((short)((struct mtop*)addr)->mt_op) { 558 default: 559 #if 0 560 case MTFSR: /* forward space record */ 561 case MTBSR: /* backward space record */ 562 case MTBSF: /* backward space file */ 563 #endif 564 return EINVAL; 565 case MTNOP: /* no operation, sets status only */ 566 case MTCACHE: /* enable controller cache */ 567 case MTNOCACHE: /* disable controller cache */ 568 return 0; 569 case MTREW: /* rewind */ 570 case MTOFFL: /* rewind and put the drive offline */ 571 if (sc->flags & TPREW) /* rewind is running */ 572 return 0; 573 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 574 return error; 575 wtrewind(sc); 576 return 0; 577 case MTFSF: /* forward space file */ 578 for (count = ((struct mtop*)addr)->mt_count; count > 0; 579 --count) { 580 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 581 return error; 582 if ((error = wtreadfm(sc)) != 0) 583 return error; 584 } 585 return 0; 586 case MTWEOF: /* write an end-of-file record */ 587 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 588 return EACCES; 589 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 590 return error; 591 if ((error = wtwritefm(sc)) != 0) 592 return error; 593 return 0; 594 } 595 596 #ifdef DIAGNOSTIC 597 panic("wtioctl: impossible"); 598 #endif 599 } 600 601 /* 602 * Strategy routine. 603 */ 604 static void 605 wtstrategy(struct buf *bp) 606 { 607 struct wt_softc *sc; 608 int s; 609 610 sc = device_lookup_private(&wt_cd, minor(bp->b_dev) & T_UNIT); 611 612 bp->b_resid = bp->b_bcount; 613 614 /* at file marks and end of tape, we just return '0 bytes available' */ 615 if (sc->flags & TPVOL) 616 goto xit; 617 618 if (bp->b_flags & B_READ) { 619 /* Check read access and no previous write to this tape. */ 620 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 621 goto errxit; 622 623 /* For now, we assume that all data will be copied out */ 624 /* If read command outstanding, just skip down */ 625 if ((sc->flags & TPRO) == 0) { 626 if (!wtsense(sc, 1, TP_WRP)) { 627 /* Clear status. */ 628 goto errxit; 629 } 630 if (!wtcmd(sc, QIC_RDDATA)) { 631 /* Set read mode. */ 632 wtsense(sc, 1, TP_WRP); 633 goto errxit; 634 } 635 sc->flags |= TPRO | TPRANY; 636 } 637 } else { 638 /* Check write access and write protection. */ 639 /* No previous read from this tape allowed. */ 640 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 641 goto errxit; 642 643 /* If write command outstanding, just skip down */ 644 if ((sc->flags & TPWO) == 0) { 645 if (!wtsense(sc, 1, 0)) { 646 /* Clear status. */ 647 goto errxit; 648 } 649 if (!wtcmd(sc, QIC_WRTDATA)) { 650 /* Set write mode. */ 651 wtsense(sc, 1, 0); 652 goto errxit; 653 } 654 sc->flags |= TPWO | TPWANY; 655 } 656 } 657 658 if (bp->b_bcount == 0) 659 goto xit; 660 661 sc->flags &= ~TPEXCEP; 662 s = splbio(); 663 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 664 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 665 bp->b_resid -= sc->dmacount; 666 } 667 splx(s); 668 669 if (sc->flags & TPEXCEP) { 670 errxit: 671 bp->b_error = EIO; 672 } 673 xit: 674 biodone(bp); 675 return; 676 } 677 678 static int 679 wtread(dev_t dev, struct uio *uio, int flags) 680 { 681 682 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 683 } 684 685 static int 686 wtwrite(dev_t dev, struct uio *uio, int flags) 687 { 688 689 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 690 } 691 692 /* 693 * Interrupt routine. 694 */ 695 static int 696 wtintr(void *arg) 697 { 698 struct wt_softc *sc = arg; 699 u_char x; 700 701 /* get status */ 702 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 703 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 704 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 705 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 706 WTDBPRINT(("busy\n")); 707 return 0; /* device is busy */ 708 } 709 710 /* 711 * Check if rewind finished. 712 */ 713 if (sc->flags & TPREW) { 714 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 715 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 716 "rewind busy?\n" : "rewind finished\n")); 717 sc->flags &= ~TPREW; /* rewind finished */ 718 wtsense(sc, 1, TP_WRP); 719 wakeup((void *)sc); 720 return 1; 721 } 722 723 /* 724 * Check if writing/reading of file mark finished. 725 */ 726 if (sc->flags & (TPRMARK | TPWMARK)) { 727 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 728 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 729 "marker r/w busy?\n" : "marker r/w finished\n")); 730 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 731 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 732 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 733 wakeup((void *)sc); 734 return 1; 735 } 736 737 /* 738 * Do we started any i/o? If no, just return. 739 */ 740 if ((sc->flags & TPACTIVE) == 0) { 741 WTDBPRINT(("unexpected interrupt\n")); 742 return 0; 743 } 744 sc->flags &= ~TPACTIVE; 745 sc->dmacount += sc->bsize; /* increment counter */ 746 747 /* 748 * Clean up DMA. 749 */ 750 if ((sc->dmaflags & DMAMODE_READ) && 751 (sc->dmatotal - sc->dmacount) < sc->bsize) { 752 /* If reading short block, copy the internal buffer 753 * to the user memory. */ 754 isa_dmadone(sc->sc_ic, sc->chan); 755 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 756 } else 757 isa_dmadone(sc->sc_ic, sc->chan); 758 759 /* 760 * On exception, check for end of file and end of volume. 761 */ 762 if ((x & sc->regs.NOEXCEP) == 0) { 763 WTDBPRINT(("i/o exception\n")); 764 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 765 if (sc->error & (TP_EOM | TP_FIL)) 766 sc->flags |= TPVOL; /* end of file */ 767 else 768 sc->flags |= TPEXCEP; /* i/o error */ 769 wakeup((void *)sc); 770 return 1; 771 } 772 773 if (sc->dmacount < sc->dmatotal) { 774 /* Continue I/O. */ 775 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 776 wtdma(sc); 777 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 778 return 1; 779 } 780 if (sc->dmacount > sc->dmatotal) /* short last block */ 781 sc->dmacount = sc->dmatotal; 782 /* Wake up user level. */ 783 wakeup((void *)sc); 784 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 785 return 1; 786 } 787 788 /* start the rewind operation */ 789 static void 790 wtrewind(struct wt_softc *sc) 791 { 792 int rwmode = sc->flags & (TPRO | TPWO); 793 794 sc->flags &= ~(TPRO | TPWO | TPVOL); 795 /* 796 * Wangtek strictly follows QIC-02 standard: 797 * clearing ONLINE in read/write modes causes rewind. 798 * REWIND command is not allowed in read/write mode 799 * and gives `illegal command' error. 800 */ 801 if (sc->type == WANGTEK && rwmode) { 802 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 803 } else if (!wtcmd(sc, QIC_REWIND)) 804 return; 805 sc->flags |= TPSTART | TPREW; 806 wtclock(sc); 807 } 808 809 /* 810 * Start the `read marker' operation. 811 */ 812 static int 813 wtreadfm(struct wt_softc *sc) 814 { 815 816 sc->flags &= ~(TPRO | TPWO | TPVOL); 817 if (!wtcmd(sc, QIC_READFM)) { 818 wtsense(sc, 1, TP_WRP); 819 return EIO; 820 } 821 sc->flags |= TPRMARK | TPRANY; 822 wtclock(sc); 823 /* Don't wait for completion here. */ 824 return 0; 825 } 826 827 /* 828 * Write marker to the tape. 829 */ 830 static int 831 wtwritefm(struct wt_softc *sc) 832 { 833 834 tsleep((void *)wtwritefm, WTPRI, "wtwfm", hz); 835 sc->flags &= ~(TPRO | TPWO); 836 if (!wtcmd(sc, QIC_WRITEFM)) { 837 wtsense(sc, 1, 0); 838 return EIO; 839 } 840 sc->flags |= TPWMARK | TPWANY; 841 wtclock(sc); 842 return wtwait(sc, 0, "wtwfm"); 843 } 844 845 /* 846 * While controller status & mask == bits continue waiting. 847 */ 848 static u_char 849 wtsoft(struct wt_softc *sc, int mask, int bits) 850 { 851 bus_space_tag_t iot = sc->sc_iot; 852 bus_space_handle_t ioh = sc->sc_ioh; 853 u_char x; 854 int i; 855 856 857 /* Poll status port, waiting for specified bits. */ 858 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 859 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 860 if ((x & mask) != bits) 861 return x; 862 delay(1); 863 } 864 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 865 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 866 if ((x & mask) != bits) 867 return x; 868 delay(100); 869 } 870 for (;;) { /* forever */ 871 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 872 if ((x & mask) != bits) 873 return x; 874 tsleep((void *)wtsoft, WTPRI, "wtsoft", 1); 875 } 876 } 877 878 /* 879 * Execute QIC command. 880 */ 881 static int 882 wtcmd(struct wt_softc *sc, int cmd) 883 { 884 bus_space_tag_t iot = sc->sc_iot; 885 bus_space_handle_t ioh = sc->sc_ioh; 886 u_char x; 887 int s; 888 889 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 890 s = splbio(); 891 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 892 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 893 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 894 splx(s); 895 return 0; 896 } 897 898 /* output the command */ 899 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 900 901 /* set request */ 902 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 903 sc->regs.REQUEST | sc->regs.ONLINE); 904 905 /* wait for ready */ 906 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 907 908 /* reset request */ 909 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 910 sc->regs.IEN | sc->regs.ONLINE); 911 912 /* wait for not ready */ 913 wtsoft(sc, sc->regs.BUSY, 0); 914 splx(s); 915 return 1; 916 } 917 918 /* wait for the end of i/o, seeking marker or rewind operation */ 919 static int 920 wtwait(struct wt_softc *sc, int catch, const char *msg) 921 { 922 int error; 923 924 WTDBPRINT(("wtwait() `%s'\n", msg)); 925 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 926 if ((error = tsleep((void *)sc, WTPRI | catch, msg, 0)) != 0) 927 return error; 928 return 0; 929 } 930 931 /* initialize DMA for the i/o operation */ 932 static void 933 wtdma(struct wt_softc *sc) 934 { 935 bus_space_tag_t iot = sc->sc_iot; 936 bus_space_handle_t ioh = sc->sc_ioh; 937 938 sc->flags |= TPACTIVE; 939 wtclock(sc); 940 941 if (sc->type == ARCHIVE) { 942 /* Set DMA. */ 943 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 944 } 945 946 if ((sc->dmaflags & DMAMODE_READ) && 947 (sc->dmatotal - sc->dmacount) < sc->bsize) { 948 /* Reading short block; do it through the internal buffer. */ 949 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 950 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 951 } else 952 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 953 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 954 } 955 956 /* start i/o operation */ 957 static int 958 wtstart(struct wt_softc *sc, int flag, void *vaddr, size_t len) 959 { 960 u_char x; 961 962 WTDBPRINT(("wtstart()\n")); 963 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 964 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 965 if ((x & sc->regs.NOEXCEP) == 0) { 966 sc->flags |= TPEXCEP; /* error */ 967 return 0; 968 } 969 sc->flags &= ~TPEXCEP; /* clear exception flag */ 970 sc->dmavaddr = vaddr; 971 sc->dmatotal = len; 972 sc->dmacount = 0; 973 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 974 wtdma(sc); 975 return 1; 976 } 977 978 /* 979 * Start timer. 980 */ 981 static void 982 wtclock(struct wt_softc *sc) 983 { 984 985 if (sc->flags & TPTIMER) 986 return; 987 sc->flags |= TPTIMER; 988 /* 989 * Some controllers seem to lose DMA interrupts too often. To make the 990 * tape stream we need 1 tick timeout. 991 */ 992 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 993 wttimer, sc); 994 } 995 996 /* 997 * Simulate an interrupt periodically while i/o is going. 998 * This is necessary in case interrupts get eaten due to 999 * multiple devices on a single IRQ line. 1000 */ 1001 static void 1002 wttimer(void *arg) 1003 { 1004 register struct wt_softc *sc = (struct wt_softc *)arg; 1005 int s; 1006 u_char status; 1007 1008 sc->flags &= ~TPTIMER; 1009 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 1010 return; 1011 1012 /* If i/o going, simulate interrupt. */ 1013 s = splbio(); 1014 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 1015 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 1016 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 1017 WTDBPRINT(("wttimer() -- ")); 1018 wtintr(sc); 1019 } 1020 splx(s); 1021 1022 /* Restart timer if i/o pending. */ 1023 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1024 wtclock(sc); 1025 } 1026 1027 /* 1028 * Perform QIC-02 and QIC-36 compatible reset sequence. 1029 */ 1030 static int 1031 wtreset(bus_space_tag_t iot, bus_space_handle_t ioh, struct wtregs *regs) 1032 { 1033 u_char x; 1034 int i; 1035 1036 /* send reset */ 1037 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1038 delay(30); 1039 /* turn off reset */ 1040 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1041 delay(30); 1042 1043 /* Read the controller status. */ 1044 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1045 if (x == 0xff) /* no port at this address? */ 1046 return 0; 1047 1048 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1049 for (i = 0; i < 3000; ++i) { 1050 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1051 break; 1052 delay(1000); 1053 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1054 } 1055 return (x & regs->RESETMASK) == regs->RESETVAL; 1056 } 1057 1058 /* 1059 * Get controller status information. Return 0 if user i/o request should 1060 * receive an i/o error code. 1061 */ 1062 static int 1063 wtsense(struct wt_softc *sc, int verbose, int ignore) 1064 { 1065 const char *msg = 0; 1066 int error; 1067 1068 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1069 sc->flags &= ~(TPRO | TPWO); 1070 if (!wtstatus(sc)) 1071 return 0; 1072 if ((sc->error & TP_ST0) == 0) 1073 sc->error &= ~TP_ST0MASK; 1074 if ((sc->error & TP_ST1) == 0) 1075 sc->error &= ~TP_ST1MASK; 1076 sc->error &= ~ignore; /* ignore certain errors */ 1077 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1078 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1079 if (!error) 1080 return 1; 1081 if (!verbose) 1082 return 0; 1083 1084 /* lifted from tdriver.c from Wangtek */ 1085 if (error & TP_USL) 1086 msg = "Drive not online"; 1087 else if (error & TP_CNI) 1088 msg = "No cartridge"; 1089 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1090 msg = "Tape is write protected"; 1091 sc->flags |= TPWP; 1092 } else if (error & TP_FIL) 1093 msg = 0 /*"Filemark detected"*/; 1094 else if (error & TP_EOM) 1095 msg = 0 /*"End of tape"*/; 1096 else if (error & TP_BNL) 1097 msg = "Block not located"; 1098 else if (error & TP_UDA) 1099 msg = "Unrecoverable data error"; 1100 else if (error & TP_NDT) 1101 msg = "No data detected"; 1102 else if (error & TP_ILL) 1103 msg = "Illegal command"; 1104 if (msg) 1105 printf("%s: %s\n", device_xname(sc->sc_dev), msg); 1106 return 0; 1107 } 1108 1109 /* 1110 * Get controller status information. 1111 */ 1112 static int 1113 wtstatus(struct wt_softc *sc) 1114 { 1115 bus_space_tag_t iot = sc->sc_iot; 1116 bus_space_handle_t ioh = sc->sc_ioh; 1117 char *p; 1118 int s; 1119 1120 s = splbio(); 1121 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1122 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1123 /* send `read status' command */ 1124 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1125 1126 /* set request */ 1127 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1128 sc->regs.REQUEST | sc->regs.ONLINE); 1129 1130 /* wait for ready */ 1131 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1132 /* reset request */ 1133 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1134 1135 /* wait for not ready */ 1136 wtsoft(sc, sc->regs.BUSY, 0); 1137 1138 p = (char *)&sc->error; 1139 while (p < (char *)&sc->error + 6) { 1140 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1141 sc->regs.BUSY | sc->regs.NOEXCEP); 1142 1143 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1144 splx(s); 1145 return 0; 1146 } 1147 1148 /* read status byte */ 1149 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1150 1151 /* set request */ 1152 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1153 sc->regs.REQUEST | sc->regs.ONLINE); 1154 1155 /* wait for not ready */ 1156 wtsoft(sc, sc->regs.BUSY, 0); 1157 1158 /* unset request */ 1159 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1160 } 1161 splx(s); 1162 return 1; 1163 } 1164