Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/dev/isa/wt.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /* $NetBSD: wt.c,v 1.61 2003/05/09 23:51:29 fvdl 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 1.61 2003/05/09 23:51:29 fvdl 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/conf.h> 68 69 #include <machine/intr.h> 70 #include <machine/bus.h> 71 #include <machine/pio.h> 72 73 #include <dev/isa/isavar.h> 74 #include <dev/isa/isadmavar.h> 75 #include <dev/isa/wtreg.h> 76 77 /* 78 * Uncomment this to enable internal device tracing. 79 */ 80 #define WTDBPRINT(x) /* printf x */ 81 82 #define WTPRI (PZERO+10) /* sleep priority */ 83 84 #define WT_NPORT 2 /* 2 i/o ports */ 85 #define AV_NPORT 4 /* 4 i/o ports */ 86 87 enum wttype { 88 UNKNOWN = 0, /* unknown type, driver disabled */ 89 ARCHIVE, /* Archive Viper SC499, SC402 etc */ 90 WANGTEK, /* Wangtek */ 91 }; 92 93 static struct wtregs { 94 /* controller ports */ 95 int DATAPORT, /* data, read only */ 96 CMDPORT, /* command, write only */ 97 STATPORT, /* status, read only */ 98 CTLPORT, /* control, write only */ 99 SDMAPORT, /* start DMA */ 100 RDMAPORT; /* reset DMA */ 101 /* status port bits */ 102 u_char BUSY, /* not ready bit define */ 103 NOEXCEP, /* no exception bit define */ 104 RESETMASK, /* to check after reset */ 105 RESETVAL, /* state after reset */ 106 /* control port bits */ 107 ONLINE, /* device selected */ 108 RESET, /* reset command */ 109 REQUEST, /* request command */ 110 IEN; /* enable interrupts */ 111 } wtregs = { 112 1, 1, 0, 0, 0, 0, 113 0x01, 0x02, 0x07, 0x05, 114 0x01, 0x02, 0x04, 0x08 115 }, avregs = { 116 0, 0, 1, 1, 2, 3, 117 0x40, 0x20, 0xf8, 0x50, 118 0, 0x80, 0x40, 0x20 119 }; 120 121 struct wt_softc { 122 struct device sc_dev; 123 void *sc_ih; 124 125 bus_space_tag_t sc_iot; 126 bus_space_handle_t sc_ioh; 127 isa_chipset_tag_t sc_ic; 128 129 struct callout sc_timer_ch; 130 131 enum wttype type; /* type of controller */ 132 int chan; /* DMA channel number, 1..3 */ 133 int flags; /* state of tape drive */ 134 unsigned dens; /* tape density */ 135 int bsize; /* tape block size */ 136 void *buf; /* internal i/o buffer */ 137 138 void *dmavaddr; /* virtual address of DMA i/o buffer */ 139 size_t dmatotal; /* size of i/o buffer */ 140 int dmaflags; /* i/o direction */ 141 size_t dmacount; /* resulting length of DMA i/o */ 142 143 u_short error; /* code for error encountered */ 144 u_short ercnt; /* number of error blocks */ 145 u_short urcnt; /* number of underruns */ 146 147 struct wtregs regs; 148 }; 149 150 dev_type_open(wtopen); 151 dev_type_close(wtclose); 152 dev_type_read(wtread); 153 dev_type_write(wtwrite); 154 dev_type_ioctl(wtioctl); 155 dev_type_strategy(wtstrategy); 156 dev_type_dump(wtdump); 157 dev_type_size(wtsize); 158 159 const struct bdevsw wt_bdevsw = { 160 wtopen, wtclose, wtstrategy, wtioctl, wtdump, wtsize, D_TAPE 161 }; 162 163 const struct cdevsw wt_cdevsw = { 164 wtopen, wtclose, wtread, wtwrite, wtioctl, 165 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 166 }; 167 168 int wtwait __P((struct wt_softc *sc, int catch, char *msg)); 169 int wtcmd __P((struct wt_softc *sc, int cmd)); 170 int wtstart __P((struct wt_softc *sc, int flag, void *vaddr, size_t len)); 171 void wtdma __P((struct wt_softc *sc)); 172 void wttimer __P((void *arg)); 173 void wtclock __P((struct wt_softc *sc)); 174 int wtreset __P((bus_space_tag_t, bus_space_handle_t, struct wtregs *)); 175 int wtsense __P((struct wt_softc *sc, int verbose, int ignore)); 176 int wtstatus __P((struct wt_softc *sc)); 177 void wtrewind __P((struct wt_softc *sc)); 178 int wtreadfm __P((struct wt_softc *sc)); 179 int wtwritefm __P((struct wt_softc *sc)); 180 u_char wtsoft __P((struct wt_softc *sc, int mask, int bits)); 181 182 int wtprobe __P((struct device *, struct cfdata *, void *)); 183 void wtattach __P((struct device *, struct device *, void *)); 184 int wtintr __P((void *sc)); 185 186 CFATTACH_DECL(wt, sizeof(struct wt_softc), 187 wtprobe, wtattach, NULL, NULL); 188 189 extern struct cfdriver wt_cd; 190 191 /* 192 * Probe for the presence of the device. 193 */ 194 int 195 wtprobe(parent, match, aux) 196 struct device *parent; 197 struct cfdata *match; 198 void *aux; 199 { 200 struct isa_attach_args *ia = aux; 201 bus_space_tag_t iot = ia->ia_iot; 202 bus_space_handle_t ioh; 203 int rv = 0, iosize; 204 205 if (ia->ia_nio < 1) 206 return (0); 207 if (ia->ia_nirq < 1) 208 return (0); 209 if (ia->ia_ndrq < 1); 210 211 /* Disallow wildcarded i/o address. */ 212 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 213 return (0); 214 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 215 return (0); 216 217 if (ia->ia_drq[0].ir_drq < 1 || ia->ia_drq[0].ir_drq > 3) { 218 printf("wtprobe: Bad drq=%d, should be 1..3\n", 219 ia->ia_drq[0].ir_drq); 220 return (0); 221 } 222 223 iosize = AV_NPORT; 224 225 /* Map i/o space */ 226 if (bus_space_map(iot, ia->ia_io[0].ir_addr, iosize, 0, &ioh)) 227 return 0; 228 229 /* Try Wangtek. */ 230 if (wtreset(iot, ioh, &wtregs)) { 231 iosize = WT_NPORT; /* XXX misleading */ 232 rv = 1; 233 goto done; 234 } 235 236 /* Try Archive. */ 237 if (wtreset(iot, ioh, &avregs)) { 238 iosize = AV_NPORT; 239 rv = 1; 240 goto done; 241 } 242 243 done: 244 if (rv) { 245 ia->ia_nio = 1; 246 ia->ia_io[0].ir_size = iosize; 247 248 ia->ia_nirq = 1; 249 ia->ia_ndrq = 1; 250 251 ia->ia_niomem = 0; 252 } 253 bus_space_unmap(iot, ioh, AV_NPORT); 254 return rv; 255 } 256 257 /* 258 * Device is found, configure it. 259 */ 260 void 261 wtattach(parent, self, aux) 262 struct device *parent, *self; 263 void *aux; 264 { 265 struct wt_softc *sc = (void *)self; 266 struct isa_attach_args *ia = aux; 267 bus_space_tag_t iot = ia->ia_iot; 268 bus_space_handle_t ioh; 269 bus_size_t maxsize; 270 271 /* Map i/o space */ 272 if (bus_space_map(iot, ia->ia_io[0].ir_addr, AV_NPORT, 0, &ioh)) { 273 printf(": can't map i/o space\n"); 274 return; 275 } 276 277 sc->sc_iot = iot; 278 sc->sc_ioh = ioh; 279 sc->sc_ic = ia->ia_ic; 280 281 callout_init(&sc->sc_timer_ch); 282 283 /* Try Wangtek. */ 284 if (wtreset(iot, ioh, &wtregs)) { 285 sc->type = WANGTEK; 286 memcpy(&sc->regs, &wtregs, sizeof(sc->regs)); 287 printf(": type <Wangtek>\n"); 288 goto ok; 289 } 290 291 /* Try Archive. */ 292 if (wtreset(iot, ioh, &avregs)) { 293 sc->type = ARCHIVE; 294 memcpy(&sc->regs, &avregs, sizeof(sc->regs)); 295 printf(": type <Archive>\n"); 296 /* Reset DMA. */ 297 bus_space_write_1(iot, ioh, sc->regs.RDMAPORT, 0); 298 goto ok; 299 } 300 301 /* what happened? */ 302 printf("%s: lost controller\n", self->dv_xname); 303 return; 304 305 ok: 306 sc->flags = TPSTART; /* tape is rewound */ 307 sc->dens = -1; /* unknown density */ 308 309 sc->chan = ia->ia_drq[0].ir_drq; 310 311 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->chan)) < MAXPHYS) { 312 printf("%s: max DMA size %lu is less than required %d\n", 313 sc->sc_dev.dv_xname, (u_long)maxsize, MAXPHYS); 314 return; 315 } 316 317 if (isa_drq_alloc(sc->sc_ic, sc->chan) != 0) { 318 printf("%s: can't reserve drq %d\n", 319 sc->sc_dev.dv_xname, sc->chan); 320 return; 321 } 322 323 if (isa_dmamap_create(sc->sc_ic, sc->chan, MAXPHYS, 324 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 325 printf("%s: can't set up ISA DMA map\n", 326 sc->sc_dev.dv_xname); 327 return; 328 } 329 330 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 331 IST_EDGE, IPL_BIO, wtintr, sc); 332 } 333 334 int 335 wtdump(dev, blkno, va, size) 336 dev_t dev; 337 daddr_t blkno; 338 caddr_t va; 339 size_t size; 340 { 341 342 /* Not implemented. */ 343 return ENXIO; 344 } 345 346 int 347 wtsize(dev) 348 dev_t dev; 349 { 350 351 /* Not implemented. */ 352 return -1; 353 } 354 355 /* 356 * Open routine, called on every device open. 357 */ 358 int 359 wtopen(dev, flag, mode, p) 360 dev_t dev; 361 int flag; 362 int mode; 363 struct proc *p; 364 { 365 int unit = minor(dev) & T_UNIT; 366 struct wt_softc *sc; 367 int error; 368 369 sc = device_lookup(&wt_cd, unit); 370 if (sc == NULL) 371 return (ENXIO); 372 373 /* Check that device is not in use */ 374 if (sc->flags & TPINUSE) 375 return EBUSY; 376 377 /* If the tape is in rewound state, check the status and set density. */ 378 if (sc->flags & TPSTART) { 379 /* If rewind is going on, wait */ 380 if ((error = wtwait(sc, PCATCH, "wtrew")) != 0) 381 return error; 382 383 /* Check the controller status */ 384 if (!wtsense(sc, 0, (flag & FWRITE) ? 0 : TP_WRP)) { 385 /* Bad status, reset the controller. */ 386 if (!wtreset(sc->sc_iot, sc->sc_ioh, &sc->regs)) 387 return EIO; 388 if (!wtsense(sc, 1, (flag & FWRITE) ? 0 : TP_WRP)) 389 return EIO; 390 } 391 392 /* Set up tape density. */ 393 if (sc->dens != (minor(dev) & WT_DENSEL)) { 394 int d = 0; 395 396 switch (minor(dev) & WT_DENSEL) { 397 case WT_DENSDFLT: 398 default: 399 break; /* default density */ 400 case WT_QIC11: 401 d = QIC_FMT11; break; /* minor 010 */ 402 case WT_QIC24: 403 d = QIC_FMT24; break; /* minor 020 */ 404 case WT_QIC120: 405 d = QIC_FMT120; break; /* minor 030 */ 406 case WT_QIC150: 407 d = QIC_FMT150; break; /* minor 040 */ 408 case WT_QIC300: 409 d = QIC_FMT300; break; /* minor 050 */ 410 case WT_QIC600: 411 d = QIC_FMT600; break; /* minor 060 */ 412 } 413 if (d) { 414 /* Change tape density. */ 415 if (!wtcmd(sc, d)) 416 return EIO; 417 if (!wtsense(sc, 1, TP_WRP | TP_ILL)) 418 return EIO; 419 420 /* Check the status of the controller. */ 421 if (sc->error & TP_ILL) { 422 printf("%s: invalid tape density\n", 423 sc->sc_dev.dv_xname); 424 return ENODEV; 425 } 426 } 427 sc->dens = minor(dev) & WT_DENSEL; 428 } 429 sc->flags &= ~TPSTART; 430 } else if (sc->dens != (minor(dev) & WT_DENSEL)) 431 return ENXIO; 432 433 sc->bsize = (minor(dev) & WT_BSIZE) ? 1024 : 512; 434 sc->buf = malloc(sc->bsize, M_TEMP, M_WAITOK); 435 436 sc->flags = TPINUSE; 437 if (flag & FREAD) 438 sc->flags |= TPREAD; 439 if (flag & FWRITE) 440 sc->flags |= TPWRITE; 441 return 0; 442 } 443 444 /* 445 * Close routine, called on last device close. 446 */ 447 int 448 wtclose(dev, flags, mode, p) 449 dev_t dev; 450 int flags; 451 int mode; 452 struct proc *p; 453 { 454 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 455 456 /* If rewind is pending, do nothing */ 457 if (sc->flags & TPREW) 458 goto done; 459 460 /* If seek forward is pending and no rewind on close, do nothing */ 461 if (sc->flags & TPRMARK) { 462 if (minor(dev) & T_NOREWIND) 463 goto done; 464 465 /* If read file mark is going on, wait */ 466 wtwait(sc, 0, "wtrfm"); 467 } 468 469 if (sc->flags & TPWANY) { 470 /* Tape was written. Write file mark. */ 471 wtwritefm(sc); 472 } 473 474 if ((minor(dev) & T_NOREWIND) == 0) { 475 /* Rewind to beginning of tape. */ 476 /* Don't wait until rewind, though. */ 477 wtrewind(sc); 478 goto done; 479 } 480 if ((sc->flags & TPRANY) && (sc->flags & (TPVOL | TPWANY)) == 0) { 481 /* Space forward to after next file mark if no writing done. */ 482 /* Don't wait for completion. */ 483 wtreadfm(sc); 484 } 485 486 done: 487 sc->flags &= TPREW | TPRMARK | TPSTART | TPTIMER; 488 free(sc->buf, M_TEMP); 489 return 0; 490 } 491 492 /* 493 * Ioctl routine. Compatible with BSD ioctls. 494 * Direct QIC-02 commands ERASE and RETENSION added. 495 * There are three possible ioctls: 496 * ioctl(int fd, MTIOCGET, struct mtget *buf) -- get status 497 * ioctl(int fd, MTIOCTOP, struct mtop *buf) -- do BSD-like op 498 * ioctl(int fd, WTQICMD, int qicop) -- do QIC op 499 */ 500 int 501 wtioctl(dev, cmd, addr, flag, p) 502 dev_t dev; 503 u_long cmd; 504 caddr_t addr; 505 int flag; 506 struct proc *p; 507 { 508 struct wt_softc *sc = device_lookup(&wt_cd, minor(dev) & T_UNIT); 509 int error, count, op; 510 511 switch (cmd) { 512 default: 513 return EINVAL; 514 case WTQICMD: /* direct QIC command */ 515 op = *(int *)addr; 516 switch (op) { 517 default: 518 return EINVAL; 519 case QIC_ERASE: /* erase the whole tape */ 520 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 521 return EACCES; 522 if ((error = wtwait(sc, PCATCH, "wterase")) != 0) 523 return error; 524 break; 525 case QIC_RETENS: /* retension the tape */ 526 if ((error = wtwait(sc, PCATCH, "wtretens")) != 0) 527 return error; 528 break; 529 } 530 /* Both ERASE and RETENS operations work like REWIND. */ 531 /* Simulate the rewind operation here. */ 532 sc->flags &= ~(TPRO | TPWO | TPVOL); 533 if (!wtcmd(sc, op)) 534 return EIO; 535 sc->flags |= TPSTART | TPREW; 536 if (op == QIC_ERASE) 537 sc->flags |= TPWANY; 538 wtclock(sc); 539 return 0; 540 case MTIOCIEOT: /* ignore EOT errors */ 541 case MTIOCEEOT: /* enable EOT errors */ 542 return 0; 543 case MTIOCGET: 544 ((struct mtget*)addr)->mt_type = 545 sc->type == ARCHIVE ? MT_ISVIPER1 : 0x11; 546 ((struct mtget*)addr)->mt_dsreg = sc->flags; /* status */ 547 ((struct mtget*)addr)->mt_erreg = sc->error; /* errors */ 548 ((struct mtget*)addr)->mt_resid = 0; 549 ((struct mtget*)addr)->mt_fileno = 0; /* file */ 550 ((struct mtget*)addr)->mt_blkno = 0; /* block */ 551 return 0; 552 case MTIOCTOP: 553 break; 554 } 555 556 switch ((short)((struct mtop*)addr)->mt_op) { 557 default: 558 #if 0 559 case MTFSR: /* forward space record */ 560 case MTBSR: /* backward space record */ 561 case MTBSF: /* backward space file */ 562 #endif 563 return EINVAL; 564 case MTNOP: /* no operation, sets status only */ 565 case MTCACHE: /* enable controller cache */ 566 case MTNOCACHE: /* disable controller cache */ 567 return 0; 568 case MTREW: /* rewind */ 569 case MTOFFL: /* rewind and put the drive offline */ 570 if (sc->flags & TPREW) /* rewind is running */ 571 return 0; 572 if ((error = wtwait(sc, PCATCH, "wtorew")) != 0) 573 return error; 574 wtrewind(sc); 575 return 0; 576 case MTFSF: /* forward space file */ 577 for (count = ((struct mtop*)addr)->mt_count; count > 0; 578 --count) { 579 if ((error = wtwait(sc, PCATCH, "wtorfm")) != 0) 580 return error; 581 if ((error = wtreadfm(sc)) != 0) 582 return error; 583 } 584 return 0; 585 case MTWEOF: /* write an end-of-file record */ 586 if ((sc->flags & TPWRITE) == 0 || (sc->flags & TPWP)) 587 return EACCES; 588 if ((error = wtwait(sc, PCATCH, "wtowfm")) != 0) 589 return error; 590 if ((error = wtwritefm(sc)) != 0) 591 return error; 592 return 0; 593 } 594 595 #ifdef DIAGNOSTIC 596 panic("wtioctl: impossible"); 597 #endif 598 } 599 600 /* 601 * Strategy routine. 602 */ 603 void 604 wtstrategy(bp) 605 struct buf *bp; 606 { 607 struct wt_softc *sc = device_lookup(&wt_cd, minor(bp->b_dev) & T_UNIT); 608 int s; 609 610 bp->b_resid = bp->b_bcount; 611 612 /* at file marks and end of tape, we just return '0 bytes available' */ 613 if (sc->flags & TPVOL) 614 goto xit; 615 616 if (bp->b_flags & B_READ) { 617 /* Check read access and no previous write to this tape. */ 618 if ((sc->flags & TPREAD) == 0 || (sc->flags & TPWANY)) 619 goto errxit; 620 621 /* For now, we assume that all data will be copied out */ 622 /* If read command outstanding, just skip down */ 623 if ((sc->flags & TPRO) == 0) { 624 if (!wtsense(sc, 1, TP_WRP)) { 625 /* Clear status. */ 626 goto errxit; 627 } 628 if (!wtcmd(sc, QIC_RDDATA)) { 629 /* Set read mode. */ 630 wtsense(sc, 1, TP_WRP); 631 goto errxit; 632 } 633 sc->flags |= TPRO | TPRANY; 634 } 635 } else { 636 /* Check write access and write protection. */ 637 /* No previous read from this tape allowed. */ 638 if ((sc->flags & TPWRITE) == 0 || (sc->flags & (TPWP | TPRANY))) 639 goto errxit; 640 641 /* If write command outstanding, just skip down */ 642 if ((sc->flags & TPWO) == 0) { 643 if (!wtsense(sc, 1, 0)) { 644 /* Clear status. */ 645 goto errxit; 646 } 647 if (!wtcmd(sc, QIC_WRTDATA)) { 648 /* Set write mode. */ 649 wtsense(sc, 1, 0); 650 goto errxit; 651 } 652 sc->flags |= TPWO | TPWANY; 653 } 654 } 655 656 if (bp->b_bcount == 0) 657 goto xit; 658 659 sc->flags &= ~TPEXCEP; 660 s = splbio(); 661 if (wtstart(sc, bp->b_flags, bp->b_data, bp->b_bcount)) { 662 wtwait(sc, 0, (bp->b_flags & B_READ) ? "wtread" : "wtwrite"); 663 bp->b_resid -= sc->dmacount; 664 } 665 splx(s); 666 667 if (sc->flags & TPEXCEP) { 668 errxit: 669 bp->b_flags |= B_ERROR; 670 bp->b_error = EIO; 671 } 672 xit: 673 biodone(bp); 674 return; 675 } 676 677 int 678 wtread(dev, uio, flags) 679 dev_t dev; 680 struct uio *uio; 681 int flags; 682 { 683 684 return (physio(wtstrategy, NULL, dev, B_READ, minphys, uio)); 685 } 686 687 int 688 wtwrite(dev, uio, flags) 689 dev_t dev; 690 struct uio *uio; 691 int flags; 692 { 693 694 return (physio(wtstrategy, NULL, dev, B_WRITE, minphys, uio)); 695 } 696 697 /* 698 * Interrupt routine. 699 */ 700 int 701 wtintr(arg) 702 void *arg; 703 { 704 struct wt_softc *sc = arg; 705 u_char x; 706 707 /* get status */ 708 x = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 709 WTDBPRINT(("wtintr() status=0x%x -- ", x)); 710 if ((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 711 == (sc->regs.BUSY | sc->regs.NOEXCEP)) { 712 WTDBPRINT(("busy\n")); 713 return 0; /* device is busy */ 714 } 715 716 /* 717 * Check if rewind finished. 718 */ 719 if (sc->flags & TPREW) { 720 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 721 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 722 "rewind busy?\n" : "rewind finished\n")); 723 sc->flags &= ~TPREW; /* rewind finished */ 724 wtsense(sc, 1, TP_WRP); 725 wakeup((caddr_t)sc); 726 return 1; 727 } 728 729 /* 730 * Check if writing/reading of file mark finished. 731 */ 732 if (sc->flags & (TPRMARK | TPWMARK)) { 733 WTDBPRINT(((x & (sc->regs.BUSY | sc->regs.NOEXCEP)) 734 == (sc->regs.BUSY | sc->regs.NOEXCEP) ? 735 "marker r/w busy?\n" : "marker r/w finished\n")); 736 if ((x & sc->regs.NOEXCEP) == 0) /* operation failed */ 737 wtsense(sc, 1, (sc->flags & TPRMARK) ? TP_WRP : 0); 738 sc->flags &= ~(TPRMARK | TPWMARK); /* operation finished */ 739 wakeup((caddr_t)sc); 740 return 1; 741 } 742 743 /* 744 * Do we started any i/o? If no, just return. 745 */ 746 if ((sc->flags & TPACTIVE) == 0) { 747 WTDBPRINT(("unexpected interrupt\n")); 748 return 0; 749 } 750 sc->flags &= ~TPACTIVE; 751 sc->dmacount += sc->bsize; /* increment counter */ 752 753 /* 754 * Clean up DMA. 755 */ 756 if ((sc->dmaflags & DMAMODE_READ) && 757 (sc->dmatotal - sc->dmacount) < sc->bsize) { 758 /* If reading short block, copy the internal buffer 759 * to the user memory. */ 760 isa_dmadone(sc->sc_ic, sc->chan); 761 memcpy(sc->dmavaddr, sc->buf, sc->dmatotal - sc->dmacount); 762 } else 763 isa_dmadone(sc->sc_ic, sc->chan); 764 765 /* 766 * On exception, check for end of file and end of volume. 767 */ 768 if ((x & sc->regs.NOEXCEP) == 0) { 769 WTDBPRINT(("i/o exception\n")); 770 wtsense(sc, 1, (sc->dmaflags & DMAMODE_READ) ? TP_WRP : 0); 771 if (sc->error & (TP_EOM | TP_FIL)) 772 sc->flags |= TPVOL; /* end of file */ 773 else 774 sc->flags |= TPEXCEP; /* i/o error */ 775 wakeup((caddr_t)sc); 776 return 1; 777 } 778 779 if (sc->dmacount < sc->dmatotal) { 780 /* Continue I/O. */ 781 sc->dmavaddr = (char *)sc->dmavaddr + sc->bsize; 782 wtdma(sc); 783 WTDBPRINT(("continue i/o, %d\n", sc->dmacount)); 784 return 1; 785 } 786 if (sc->dmacount > sc->dmatotal) /* short last block */ 787 sc->dmacount = sc->dmatotal; 788 /* Wake up user level. */ 789 wakeup((caddr_t)sc); 790 WTDBPRINT(("i/o finished, %d\n", sc->dmacount)); 791 return 1; 792 } 793 794 /* start the rewind operation */ 795 void 796 wtrewind(sc) 797 struct wt_softc *sc; 798 { 799 int rwmode = sc->flags & (TPRO | TPWO); 800 801 sc->flags &= ~(TPRO | TPWO | TPVOL); 802 /* 803 * Wangtek strictly follows QIC-02 standard: 804 * clearing ONLINE in read/write modes causes rewind. 805 * REWIND command is not allowed in read/write mode 806 * and gives `illegal command' error. 807 */ 808 if (sc->type == WANGTEK && rwmode) { 809 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->regs.CTLPORT, 0); 810 } else if (!wtcmd(sc, QIC_REWIND)) 811 return; 812 sc->flags |= TPSTART | TPREW; 813 wtclock(sc); 814 } 815 816 /* 817 * Start the `read marker' operation. 818 */ 819 int 820 wtreadfm(sc) 821 struct wt_softc *sc; 822 { 823 824 sc->flags &= ~(TPRO | TPWO | TPVOL); 825 if (!wtcmd(sc, QIC_READFM)) { 826 wtsense(sc, 1, TP_WRP); 827 return EIO; 828 } 829 sc->flags |= TPRMARK | TPRANY; 830 wtclock(sc); 831 /* Don't wait for completion here. */ 832 return 0; 833 } 834 835 /* 836 * Write marker to the tape. 837 */ 838 int 839 wtwritefm(sc) 840 struct wt_softc *sc; 841 { 842 843 tsleep((caddr_t)wtwritefm, WTPRI, "wtwfm", hz); 844 sc->flags &= ~(TPRO | TPWO); 845 if (!wtcmd(sc, QIC_WRITEFM)) { 846 wtsense(sc, 1, 0); 847 return EIO; 848 } 849 sc->flags |= TPWMARK | TPWANY; 850 wtclock(sc); 851 return wtwait(sc, 0, "wtwfm"); 852 } 853 854 /* 855 * While controller status & mask == bits continue waiting. 856 */ 857 u_char 858 wtsoft(sc, mask, bits) 859 struct wt_softc *sc; 860 int mask, bits; 861 { 862 bus_space_tag_t iot = sc->sc_iot; 863 bus_space_handle_t ioh = sc->sc_ioh; 864 u_char x; 865 int i; 866 867 868 /* Poll status port, waiting for specified bits. */ 869 for (i = 0; i < 1000; ++i) { /* up to 1 msec */ 870 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 871 if ((x & mask) != bits) 872 return x; 873 delay(1); 874 } 875 for (i = 0; i < 100; ++i) { /* up to 10 msec */ 876 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 877 if ((x & mask) != bits) 878 return x; 879 delay(100); 880 } 881 for (;;) { /* forever */ 882 x = bus_space_read_1(iot, ioh, sc->regs.STATPORT); 883 if ((x & mask) != bits) 884 return x; 885 tsleep((caddr_t)wtsoft, WTPRI, "wtsoft", 1); 886 } 887 } 888 889 /* 890 * Execute QIC command. 891 */ 892 int 893 wtcmd(sc, cmd) 894 struct wt_softc *sc; 895 int cmd; 896 { 897 bus_space_tag_t iot = sc->sc_iot; 898 bus_space_handle_t ioh = sc->sc_ioh; 899 u_char x; 900 int s; 901 902 WTDBPRINT(("wtcmd() cmd=0x%x\n", cmd)); 903 s = splbio(); 904 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 905 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 906 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 907 splx(s); 908 return 0; 909 } 910 911 /* output the command */ 912 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, cmd); 913 914 /* set request */ 915 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 916 sc->regs.REQUEST | sc->regs.ONLINE); 917 918 /* wait for ready */ 919 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 920 921 /* reset request */ 922 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 923 sc->regs.IEN | sc->regs.ONLINE); 924 925 /* wait for not ready */ 926 wtsoft(sc, sc->regs.BUSY, 0); 927 splx(s); 928 return 1; 929 } 930 931 /* wait for the end of i/o, seeking marker or rewind operation */ 932 int 933 wtwait(sc, catch, msg) 934 struct wt_softc *sc; 935 int catch; 936 char *msg; 937 { 938 int error; 939 940 WTDBPRINT(("wtwait() `%s'\n", msg)); 941 while (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 942 if ((error = tsleep((caddr_t)sc, WTPRI | catch, msg, 0)) != 0) 943 return error; 944 return 0; 945 } 946 947 /* initialize DMA for the i/o operation */ 948 void 949 wtdma(sc) 950 struct wt_softc *sc; 951 { 952 bus_space_tag_t iot = sc->sc_iot; 953 bus_space_handle_t ioh = sc->sc_ioh; 954 955 sc->flags |= TPACTIVE; 956 wtclock(sc); 957 958 if (sc->type == ARCHIVE) { 959 /* Set DMA. */ 960 bus_space_write_1(iot, ioh, sc->regs.SDMAPORT, 0); 961 } 962 963 if ((sc->dmaflags & DMAMODE_READ) && 964 (sc->dmatotal - sc->dmacount) < sc->bsize) { 965 /* Reading short block; do it through the internal buffer. */ 966 isa_dmastart(sc->sc_ic, sc->chan, sc->buf, 967 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 968 } else 969 isa_dmastart(sc->sc_ic, sc->chan, sc->dmavaddr, 970 sc->bsize, NULL, sc->dmaflags, BUS_DMA_NOWAIT); 971 } 972 973 /* start i/o operation */ 974 int 975 wtstart(sc, flag, vaddr, len) 976 struct wt_softc *sc; 977 int flag; 978 void *vaddr; 979 size_t len; 980 { 981 u_char x; 982 983 WTDBPRINT(("wtstart()\n")); 984 x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 985 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 986 if ((x & sc->regs.NOEXCEP) == 0) { 987 sc->flags |= TPEXCEP; /* error */ 988 return 0; 989 } 990 sc->flags &= ~TPEXCEP; /* clear exception flag */ 991 sc->dmavaddr = vaddr; 992 sc->dmatotal = len; 993 sc->dmacount = 0; 994 sc->dmaflags = flag & B_READ ? DMAMODE_READ : DMAMODE_WRITE; 995 wtdma(sc); 996 return 1; 997 } 998 999 /* 1000 * Start timer. 1001 */ 1002 void 1003 wtclock(sc) 1004 struct wt_softc *sc; 1005 { 1006 1007 if (sc->flags & TPTIMER) 1008 return; 1009 sc->flags |= TPTIMER; 1010 /* 1011 * Some controllers seem to lose DMA interrupts too often. To make the 1012 * tape stream we need 1 tick timeout. 1013 */ 1014 callout_reset(&sc->sc_timer_ch, (sc->flags & TPACTIVE) ? 1 : hz, 1015 wttimer, sc); 1016 } 1017 1018 /* 1019 * Simulate an interrupt periodically while i/o is going. 1020 * This is necessary in case interrupts get eaten due to 1021 * multiple devices on a single IRQ line. 1022 */ 1023 void 1024 wttimer(arg) 1025 void *arg; 1026 { 1027 register struct wt_softc *sc = (struct wt_softc *)arg; 1028 int s; 1029 u_char status; 1030 1031 sc->flags &= ~TPTIMER; 1032 if ((sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) == 0) 1033 return; 1034 1035 /* If i/o going, simulate interrupt. */ 1036 s = splbio(); 1037 status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->regs.STATPORT); 1038 if ((status & (sc->regs.BUSY | sc->regs.NOEXCEP)) 1039 != (sc->regs.BUSY | sc->regs.NOEXCEP)) { 1040 WTDBPRINT(("wttimer() -- ")); 1041 wtintr(sc); 1042 } 1043 splx(s); 1044 1045 /* Restart timer if i/o pending. */ 1046 if (sc->flags & (TPACTIVE | TPREW | TPRMARK | TPWMARK)) 1047 wtclock(sc); 1048 } 1049 1050 /* 1051 * Perform QIC-02 and QIC-36 compatible reset sequence. 1052 */ 1053 int 1054 wtreset(iot, ioh, regs) 1055 bus_space_tag_t iot; 1056 bus_space_handle_t ioh; 1057 struct wtregs *regs; 1058 { 1059 u_char x; 1060 int i; 1061 1062 /* send reset */ 1063 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->RESET | regs->ONLINE); 1064 delay(30); 1065 /* turn off reset */ 1066 bus_space_write_1(iot, ioh, regs->CTLPORT, regs->ONLINE); 1067 delay(30); 1068 1069 /* Read the controller status. */ 1070 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1071 if (x == 0xff) /* no port at this address? */ 1072 return 0; 1073 1074 /* Wait 3 sec for reset to complete. Needed for QIC-36 boards? */ 1075 for (i = 0; i < 3000; ++i) { 1076 if ((x & regs->BUSY) == 0 || (x & regs->NOEXCEP) == 0) 1077 break; 1078 delay(1000); 1079 x = bus_space_read_1(iot, ioh, regs->STATPORT); 1080 } 1081 return (x & regs->RESETMASK) == regs->RESETVAL; 1082 } 1083 1084 /* 1085 * Get controller status information. Return 0 if user i/o request should 1086 * receive an i/o error code. 1087 */ 1088 int 1089 wtsense(sc, verbose, ignore) 1090 struct wt_softc *sc; 1091 int verbose, ignore; 1092 { 1093 char *msg = 0; 1094 int error; 1095 1096 WTDBPRINT(("wtsense() ignore=0x%x\n", ignore)); 1097 sc->flags &= ~(TPRO | TPWO); 1098 if (!wtstatus(sc)) 1099 return 0; 1100 if ((sc->error & TP_ST0) == 0) 1101 sc->error &= ~TP_ST0MASK; 1102 if ((sc->error & TP_ST1) == 0) 1103 sc->error &= ~TP_ST1MASK; 1104 sc->error &= ~ignore; /* ignore certain errors */ 1105 error = sc->error & (TP_FIL | TP_BNL | TP_UDA | TP_EOM | TP_WRP | 1106 TP_USL | TP_CNI | TP_MBD | TP_NDT | TP_ILL); 1107 if (!error) 1108 return 1; 1109 if (!verbose) 1110 return 0; 1111 1112 /* lifted from tdriver.c from Wangtek */ 1113 if (error & TP_USL) 1114 msg = "Drive not online"; 1115 else if (error & TP_CNI) 1116 msg = "No cartridge"; 1117 else if ((error & TP_WRP) && (sc->flags & TPWP) == 0) { 1118 msg = "Tape is write protected"; 1119 sc->flags |= TPWP; 1120 } else if (error & TP_FIL) 1121 msg = 0 /*"Filemark detected"*/; 1122 else if (error & TP_EOM) 1123 msg = 0 /*"End of tape"*/; 1124 else if (error & TP_BNL) 1125 msg = "Block not located"; 1126 else if (error & TP_UDA) 1127 msg = "Unrecoverable data error"; 1128 else if (error & TP_NDT) 1129 msg = "No data detected"; 1130 else if (error & TP_ILL) 1131 msg = "Illegal command"; 1132 if (msg) 1133 printf("%s: %s\n", sc->sc_dev.dv_xname, msg); 1134 return 0; 1135 } 1136 1137 /* 1138 * Get controller status information. 1139 */ 1140 int 1141 wtstatus(sc) 1142 struct wt_softc *sc; 1143 { 1144 bus_space_tag_t iot = sc->sc_iot; 1145 bus_space_handle_t ioh = sc->sc_ioh; 1146 char *p; 1147 int s; 1148 1149 s = splbio(); 1150 wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1151 sc->regs.BUSY | sc->regs.NOEXCEP); /* ready? */ 1152 /* send `read status' command */ 1153 bus_space_write_1(iot, ioh, sc->regs.CMDPORT, QIC_RDSTAT); 1154 1155 /* set request */ 1156 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1157 sc->regs.REQUEST | sc->regs.ONLINE); 1158 1159 /* wait for ready */ 1160 wtsoft(sc, sc->regs.BUSY, sc->regs.BUSY); 1161 /* reset request */ 1162 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1163 1164 /* wait for not ready */ 1165 wtsoft(sc, sc->regs.BUSY, 0); 1166 1167 p = (char *)&sc->error; 1168 while (p < (char *)&sc->error + 6) { 1169 u_char x = wtsoft(sc, sc->regs.BUSY | sc->regs.NOEXCEP, 1170 sc->regs.BUSY | sc->regs.NOEXCEP); 1171 1172 if ((x & sc->regs.NOEXCEP) == 0) { /* error */ 1173 splx(s); 1174 return 0; 1175 } 1176 1177 /* read status byte */ 1178 *p++ = bus_space_read_1(iot, ioh, sc->regs.DATAPORT); 1179 1180 /* set request */ 1181 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, 1182 sc->regs.REQUEST | sc->regs.ONLINE); 1183 1184 /* wait for not ready */ 1185 wtsoft(sc, sc->regs.BUSY, 0); 1186 1187 /* unset request */ 1188 bus_space_write_1(iot, ioh, sc->regs.CTLPORT, sc->regs.ONLINE); 1189 } 1190 splx(s); 1191 return 1; 1192 }
Cache object: 0a1486c106d682c417adf6af7b8bf9f8
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]