fd.c revision 1.9
1 /* $NetBSD: fd.c,v 1.9 1995/07/05 13:34:10 pk Exp $ */ 2 3 /*- 4 * Copyright (c) 1993, 1994, 1995 Charles Hannum. 5 * Copyright (c) 1995 Paul Kranenburg. 6 * Copyright (c) 1990 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Don Ahn. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)fd.c 7.4 (Berkeley) 5/25/91 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/conf.h> 47 #include <sys/file.h> 48 #include <sys/ioctl.h> 49 #include <sys/device.h> 50 #include <sys/disklabel.h> 51 #include <sys/dkstat.h> 52 #include <sys/disk.h> 53 #include <sys/buf.h> 54 #include <sys/uio.h> 55 #include <sys/syslog.h> 56 #include <sys/queue.h> 57 58 #include <machine/cpu.h> 59 #include <machine/autoconf.h> 60 #include <sparc/sparc/auxreg.h> 61 #include <sparc/dev/fdreg.h> 62 #include <sparc/dev/fdvar.h> 63 64 #define FDUNIT(dev) (minor(dev) / 8) 65 #define FDTYPE(dev) (minor(dev) % 8) 66 67 #define b_cylin b_resid 68 69 #define FD_DEBUG 70 #ifdef FD_DEBUG 71 int fdc_debug = 0; 72 #endif 73 74 enum fdc_state { 75 DEVIDLE = 0, 76 MOTORWAIT, 77 DOSEEK, 78 SEEKWAIT, 79 SEEKTIMEDOUT, 80 SEEKCOMPLETE, 81 DOIO, 82 IOCOMPLETE, 83 IOTIMEDOUT, 84 DORESET, 85 RESETCOMPLETE, 86 RESETTIMEDOUT, 87 DORECAL, 88 RECALWAIT, 89 RECALTIMEDOUT, 90 RECALCOMPLETE, 91 }; 92 93 /* software state, per controller */ 94 struct fdc_softc { 95 struct dkdevice sc_dk; /* boilerplate */ 96 struct intrhand sc_sih; 97 struct intrhand sc_hih; 98 caddr_t sc_reg; 99 struct fd_softc *sc_fd[4]; /* pointers to children */ 100 TAILQ_HEAD(drivehead, fd_softc) sc_drives; 101 enum fdc_state sc_state; 102 int sc_flags; 103 #define FDC_82077 0x01 104 #define FDC_NEEDHEADSETTLE 0x02 105 #define FDC_EIS 0x04 106 int sc_errors; /* number of retries so far */ 107 int sc_overruns; /* number of DMA overruns */ 108 int sc_cfg; /* current configuration */ 109 struct fdcio sc_io; 110 #define sc_reg_msr sc_io.fdcio_reg_msr 111 #define sc_reg_fifo sc_io.fdcio_reg_fifo 112 #define sc_reg_dor sc_io.fdcio_reg_dor 113 #define sc_reg_drs sc_io.fdcio_reg_msr 114 #define sc_istate sc_io.fdcio_istate 115 #define sc_data sc_io.fdcio_data 116 #define sc_tc sc_io.fdcio_tc 117 #define sc_nstat sc_io.fdcio_nstat 118 #define sc_status sc_io.fdcio_status 119 #define sc_intrcnt sc_io.fdcio_intrcnt 120 }; 121 122 #ifndef FDC_C_HANDLER 123 extern struct fdcio *fdciop; 124 #endif 125 126 /* controller driver configuration */ 127 int fdcmatch __P((struct device *, void *, void *)); 128 void fdcattach __P((struct device *, struct device *, void *)); 129 130 struct cfdriver fdccd = { 131 NULL, "fdc", fdcmatch, fdcattach, DV_DULL, sizeof(struct fdc_softc) 132 }; 133 134 /* 135 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 136 * we tell them apart. 137 */ 138 struct fd_type { 139 int sectrac; /* sectors per track */ 140 int heads; /* number of heads */ 141 int seccyl; /* sectors per cylinder */ 142 int secsize; /* size code for sectors */ 143 int datalen; /* data len when secsize = 0 */ 144 int steprate; /* step rate and head unload time */ 145 int gap1; /* gap len between sectors */ 146 int gap2; /* formatting gap */ 147 int tracks; /* total num of tracks */ 148 int size; /* size of disk in sectors */ 149 int step; /* steps per cylinder */ 150 int rate; /* transfer speed code */ 151 char *name; 152 }; 153 154 /* The order of entries in the following table is important -- BEWARE! */ 155 struct fd_type fd_types[] = { 156 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */ 157 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,"1.2MB" }, /* 1.2 MB AT-diskettes */ 158 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,"360KB/AT" }, /* 360kB in 1.2MB drive */ 159 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,"360KB/PC" }, /* 360kB PC diskettes */ 160 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,"720KB" }, /* 3.5" 720kB diskette */ 161 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,"720KB/x" }, /* 720kB in 1.2MB drive */ 162 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,"360KB/x" }, /* 360kB in 720kB drive */ 163 }; 164 165 /* software state, per disk (with up to 4 disks per ctlr) */ 166 struct fd_softc { 167 struct dkdevice sc_dk; 168 169 struct fd_type *sc_deftype; /* default type descriptor */ 170 struct fd_type *sc_type; /* current type descriptor */ 171 172 daddr_t sc_blkno; /* starting block number */ 173 int sc_bcount; /* byte count left */ 174 int sc_skip; /* bytes already transferred */ 175 int sc_nblks; /* number of blocks currently tranferring */ 176 int sc_nbytes; /* number of bytes currently tranferring */ 177 178 int sc_drive; /* physical unit number */ 179 int sc_flags; 180 #define FD_OPEN 0x01 /* it's open */ 181 #define FD_MOTOR 0x02 /* motor should be on */ 182 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 183 int sc_cylin; /* where we think the head is */ 184 185 TAILQ_ENTRY(fd_softc) sc_drivechain; 186 int sc_ops; /* I/O ops since last switch */ 187 struct buf sc_q; /* head of buf chain */ 188 }; 189 190 /* floppy driver configuration */ 191 int fdmatch __P((struct device *, void *, void *)); 192 void fdattach __P((struct device *, struct device *, void *)); 193 194 struct cfdriver fdcd = { 195 NULL, "fd", fdmatch, fdattach, DV_DISK, sizeof(struct fd_softc) 196 }; 197 198 void fdgetdisklabel __P((struct fd_softc *)); 199 int fd_get_parms __P((struct fd_softc *)); 200 void fdstrategy __P((struct buf *)); 201 void fdstart __P((struct fd_softc *)); 202 203 struct dkdriver fddkdriver = { fdstrategy }; 204 205 struct fd_type *fd_nvtotype __P((char *, int, int)); 206 void fd_set_motor __P((struct fdc_softc *fdc, int reset)); 207 void fd_motor_off __P((void *arg)); 208 void fd_motor_on __P((void *arg)); 209 int fdcresult __P((struct fdc_softc *fdc)); 210 int out_fdc __P((struct fdc_softc *fdc, u_char x)); 211 void fdcstart __P((struct fdc_softc *fdc)); 212 void fdcstatus __P((struct device *dv, int n, char *s)); 213 void fdctimeout __P((void *arg)); 214 void fdcpseudointr __P((void *arg)); 215 #ifdef FDC_C_HANDLER 216 int fdchwintr __P((struct fdc_softc *)); 217 #else 218 void fdchwintr __P((void)); 219 #endif 220 int fdcswintr __P((struct fdc_softc *)); 221 void fdcretry __P((struct fdc_softc *fdc)); 222 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 223 224 #if PIL_FDSOFT == 4 225 #define IE_FDSOFT IE_L4 226 #else 227 #error 4 228 #endif 229 230 int 231 fdcmatch(parent, match, aux) 232 struct device *parent; 233 void *match, *aux; 234 { 235 struct cfdata *cf = match; 236 register struct confargs *ca = aux; 237 register struct romaux *ra = &ca->ca_ra; 238 239 /* Sun PROMs call the controller an "fd" */ 240 if (strcmp("fd", ra->ra_name)) 241 return (0); 242 if (ca->ca_bustype == BUS_MAIN) { 243 if (ca->ca_ra.ra_vaddr && 244 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 245 return (0); 246 } 247 return (1); 248 } 249 250 return (0); 251 } 252 253 /* 254 * Arguments passed between fdcattach and fdprobe. 255 */ 256 struct fdc_attach_args { 257 int fa_drive; 258 struct fd_type *fa_deftype; 259 }; 260 261 /* 262 * Print the location of a disk drive (called just before attaching the 263 * the drive). If `fdc' is not NULL, the drive was found but was not 264 * in the system config file; print the drive name as well. 265 * Return QUIET (config_find ignores this if the device was configured) to 266 * avoid printing `fdN not configured' messages. 267 */ 268 int 269 fdprint(aux, fdc) 270 void *aux; 271 char *fdc; 272 { 273 register struct fdc_attach_args *fa = aux; 274 275 if (!fdc) 276 printf(" drive %d", fa->fa_drive); 277 return QUIET; 278 } 279 280 static void 281 fdconf(fdc) 282 struct fdc_softc *fdc; 283 { 284 int vroom; 285 286 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 287 return; 288 289 /* 290 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 291 * the PROM thinks is appropriate. 292 */ 293 if ((vroom = fdc->sc_status[7]) == 0) 294 vroom = 0x64; 295 296 /* Configure controller to use FIFO and Implied Seek */ 297 out_fdc(fdc, NE7CMD_CFG); 298 out_fdc(fdc, vroom); 299 out_fdc(fdc, fdc->sc_cfg); 300 out_fdc(fdc, 0); /* PRETRK */ 301 /* No result phase */ 302 } 303 304 void 305 fdcattach(parent, self, aux) 306 struct device *parent, *self; 307 void *aux; 308 { 309 register struct confargs *ca = aux; 310 struct fdc_softc *fdc = (void *)self; 311 struct fdc_attach_args fa; 312 int n, pri; 313 char code; 314 315 if (ca->ca_ra.ra_vaddr) 316 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 317 else 318 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_paddr, 319 ca->ca_ra.ra_len, 320 ca->ca_bustype); 321 322 fdc->sc_state = DEVIDLE; 323 fdc->sc_istate = ISTATE_IDLE; 324 fdc->sc_flags |= FDC_EIS; 325 TAILQ_INIT(&fdc->sc_drives); 326 327 pri = ca->ca_ra.ra_intr[0].int_pri; 328 #ifdef FDC_C_HANDLER 329 fdc->sc_hih.ih_fun = (void *)fdchwintr; 330 fdc->sc_hih.ih_arg = fdc; 331 intr_establish(pri, &fdc->sc_hih); 332 #else 333 fdciop = &fdc->sc_io; 334 intr_fasttrap(pri, fdchwintr); 335 #endif 336 fdc->sc_sih.ih_fun = (void *)fdcswintr; 337 fdc->sc_sih.ih_arg = fdc; 338 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 339 340 /* Assume a 82077 */ 341 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 342 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 343 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 344 345 code = '7'; 346 if (*fdc->sc_reg_dor == NE7_RQM) { 347 /* 348 * This hack from Chris Torek: apparently DOR really 349 * addresses MSR/DRS on a 82072. 350 * We used to rely on the VERSION command to tell the 351 * difference (which did not work). 352 */ 353 *fdc->sc_reg_dor = FDC_250KBPS; 354 if (*fdc->sc_reg_dor == NE7_RQM) 355 code = '2'; 356 } 357 if (code == '7') { 358 fdc->sc_flags |= FDC_82077; 359 } else { 360 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 361 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 362 fdc->sc_reg_dor = 0; 363 } 364 365 #ifdef FD_DEBUG 366 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 367 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 368 if (fdc_debug) 369 printf("[version cmd]"); 370 } 371 #endif 372 373 /* 374 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 375 * Note: CFG_EFIFO is active-low, initial threshold value: 8 376 */ 377 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 378 fdconf(fdc); 379 380 if (fdc->sc_flags & FDC_82077) { 381 /* Lock configuration across soft resets. */ 382 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 383 if (fdcresult(fdc) != 1) 384 printf(" CFGLOCK: unexpected response"); 385 } 386 387 evcnt_attach(&fdc->sc_dk.dk_dev, "intr", &fdc->sc_intrcnt); 388 389 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 390 391 /* physical limit: four drives per controller. */ 392 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 393 fa.fa_deftype = NULL; /* unknown */ 394 fa.fa_deftype = &fd_types[0]; /* XXX */ 395 (void)config_found(self, (void *)&fa, fdprint); 396 } 397 } 398 399 int 400 fdmatch(parent, match, aux) 401 struct device *parent; 402 void *match, *aux; 403 { 404 struct fdc_softc *fdc = (void *)parent; 405 struct cfdata *cf = match; 406 struct fdc_attach_args *fa = aux; 407 int drive = fa->fa_drive; 408 int n; 409 410 if (drive > 0) 411 /* XXX - for now, punt > 1 drives */ 412 return 0; 413 414 if (fdc->sc_flags & FDC_82077) { 415 /* select drive and turn on motor */ 416 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 417 /* wait for motor to spin up */ 418 delay(250000); 419 } else { 420 auxregbisc(AUXIO_FDS, 0); 421 } 422 fdc->sc_nstat = 0; 423 out_fdc(fdc, NE7CMD_RECAL); 424 out_fdc(fdc, drive); 425 /* wait for recalibrate */ 426 for (n = 0; n < 100000; n++) { 427 delay(10); 428 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 429 /* wait a bit longer till device *really* is ready */ 430 delay(100000); 431 if (out_fdc(fdc, NE7CMD_SENSEI)) 432 break; 433 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 434 /* 435 * Got `invalid command'; we interpret it 436 * to mean that the re-calibrate hasn't in 437 * fact finished yet 438 */ 439 continue; 440 break; 441 } 442 } 443 n = fdc->sc_nstat; 444 #ifdef FD_DEBUG 445 if (fdc_debug) { 446 int i; 447 printf("fdprobe: %d stati:", n); 448 for (i = 0; i < n; i++) 449 printf(" %x", fdc->sc_status[i]); 450 printf("\n"); 451 } 452 #endif 453 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 454 return 0; 455 /* turn off motor */ 456 if (fdc->sc_flags & FDC_82077) { 457 /* select drive and turn on motor */ 458 *fdc->sc_reg_dor = FDO_FRST; 459 } else { 460 auxregbisc(0, AUXIO_FDS); 461 } 462 463 return 1; 464 } 465 466 /* 467 * Controller is working, and drive responded. Attach it. 468 */ 469 void 470 fdattach(parent, self, aux) 471 struct device *parent, *self; 472 void *aux; 473 { 474 struct fdc_softc *fdc = (void *)parent; 475 struct fd_softc *fd = (void *)self; 476 struct fdc_attach_args *fa = aux; 477 struct fd_type *type = fa->fa_deftype; 478 int drive = fa->fa_drive; 479 480 /* XXX Allow `flags' to override device type? */ 481 482 if (type) 483 printf(": %s %d cyl, %d head, %d sec\n", type->name, 484 type->tracks, type->heads, type->sectrac); 485 else 486 printf(": density unknown\n"); 487 488 fd->sc_cylin = -1; 489 fd->sc_drive = drive; 490 fd->sc_deftype = type; 491 fdc->sc_fd[drive] = fd; 492 fd->sc_dk.dk_driver = &fddkdriver; 493 #if 0 494 /* XXX Need to do some more fiddling with sc_dk. */ 495 /* XXX sparc's dk_establish is bogus */ 496 dk_establish(&fd->sc_dk, &fd->sc_dk.dk_dev); 497 #endif 498 } 499 500 inline struct fd_type * 501 fd_dev_to_type(fd, dev) 502 struct fd_softc *fd; 503 dev_t dev; 504 { 505 int type = FDTYPE(dev); 506 507 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 508 return NULL; 509 return type ? &fd_types[type - 1] : fd->sc_deftype; 510 } 511 512 void 513 fdstrategy(bp) 514 register struct buf *bp; /* IO operation to perform */ 515 { 516 struct fd_softc *fd; 517 int unit = FDUNIT(bp->b_dev); 518 int sz; 519 int s; 520 521 /* Valid unit, controller, and request? */ 522 if (unit >= fdcd.cd_ndevs || 523 (fd = fdcd.cd_devs[unit]) == 0 || 524 bp->b_blkno < 0 || 525 (bp->b_bcount % FDC_BSIZE) != 0) { 526 bp->b_error = EINVAL; 527 goto bad; 528 } 529 530 /* If it's a null transfer, return immediately. */ 531 if (bp->b_bcount == 0) 532 goto done; 533 534 sz = howmany(bp->b_bcount, FDC_BSIZE); 535 536 if (bp->b_blkno + sz > fd->sc_type->size) { 537 sz = fd->sc_type->size - bp->b_blkno; 538 if (sz == 0) { 539 /* If exactly at end of disk, return EOF. */ 540 bp->b_resid = bp->b_bcount; 541 goto done; 542 } 543 if (sz < 0) { 544 /* If past end of disk, return EINVAL. */ 545 bp->b_error = EINVAL; 546 goto bad; 547 } 548 /* Otherwise, truncate request. */ 549 bp->b_bcount = sz << DEV_BSHIFT; 550 } 551 552 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 553 554 #ifdef FD_DEBUG 555 if (fdc_debug > 1) 556 printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d\n", 557 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 558 #endif 559 560 /* Queue transfer on drive, activate drive and controller if idle. */ 561 s = splbio(); 562 disksort(&fd->sc_q, bp); 563 untimeout(fd_motor_off, fd); /* a good idea */ 564 if (!fd->sc_q.b_active) 565 fdstart(fd); 566 #ifdef DIAGNOSTIC 567 else { 568 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 569 if (fdc->sc_state == DEVIDLE) { 570 printf("fdstrategy: controller inactive\n"); 571 fdcstart(fdc); 572 } 573 } 574 #endif 575 splx(s); 576 return; 577 578 bad: 579 bp->b_flags |= B_ERROR; 580 done: 581 /* Toss transfer; we're done early. */ 582 biodone(bp); 583 } 584 585 void 586 fdstart(fd) 587 struct fd_softc *fd; 588 { 589 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 590 int active = fdc->sc_drives.tqh_first != 0; 591 592 /* Link into controller queue. */ 593 fd->sc_q.b_active = 1; 594 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 595 596 /* If controller not already active, start it. */ 597 if (!active) 598 fdcstart(fdc); 599 } 600 601 void 602 fdfinish(fd, bp) 603 struct fd_softc *fd; 604 struct buf *bp; 605 { 606 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 607 608 /* 609 * Move this drive to the end of the queue to give others a `fair' 610 * chance. We only force a switch if N operations are completed while 611 * another drive is waiting to be serviced, since there is a long motor 612 * startup delay whenever we switch. 613 */ 614 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 615 fd->sc_ops = 0; 616 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 617 if (bp->b_actf) { 618 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 619 } else 620 fd->sc_q.b_active = 0; 621 } 622 bp->b_resid = fd->sc_bcount; 623 fd->sc_skip = 0; 624 fd->sc_q.b_actf = bp->b_actf; 625 biodone(bp); 626 /* turn off motor 5s from now */ 627 timeout(fd_motor_off, fd, 5 * hz); 628 fdc->sc_state = DEVIDLE; 629 } 630 631 void 632 fd_set_motor(fdc, reset) 633 struct fdc_softc *fdc; 634 int reset; 635 { 636 struct fd_softc *fd; 637 u_char status; 638 int n; 639 640 if (fdc->sc_flags & FDC_82077) { 641 if (fd = fdc->sc_drives.tqh_first) 642 status = fd->sc_drive; 643 else 644 status = 0; 645 if (!reset) 646 status |= FDO_FRST | FDO_FDMAEN; 647 for (n = 0; n < 4; n++) 648 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 649 status |= FDO_MOEN(n); 650 *fdc->sc_reg_dor = status; 651 } else { 652 int on = 0; 653 654 for (n = 0; n < 4; n++) 655 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 656 on = 1; 657 if (on) { 658 auxregbisc(AUXIO_FDS, 0); 659 } else { 660 auxregbisc(0, AUXIO_FDS); 661 } 662 delay(10); 663 if (reset) { 664 *fdc->sc_reg_drs = DRS_RESET; 665 delay(10); 666 *fdc->sc_reg_drs = 0; 667 #ifdef FD_DEBUG 668 if (fdc_debug) 669 printf("fdc reset\n"); 670 #endif 671 fdconf(fdc); 672 } 673 674 } 675 } 676 677 void 678 fd_motor_off(arg) 679 void *arg; 680 { 681 struct fd_softc *fd = arg; 682 int s; 683 684 s = splbio(); 685 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 686 fd_set_motor((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent, 0); 687 splx(s); 688 } 689 690 void 691 fd_motor_on(arg) 692 void *arg; 693 { 694 struct fd_softc *fd = arg; 695 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 696 int s; 697 698 s = splbio(); 699 fd->sc_flags &= ~FD_MOTOR_WAIT; 700 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 701 (void) fdcswintr(fdc); 702 splx(s); 703 } 704 705 int 706 fdcresult(fdc) 707 struct fdc_softc *fdc; 708 { 709 u_char i; 710 int j = 100000, 711 n = 0; 712 713 for (; j; j--) { 714 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 715 if (i == NE7_RQM) 716 return (fdc->sc_nstat = n); 717 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 718 if (n >= sizeof(fdc->sc_status)) { 719 log(LOG_ERR, "fdcresult: overrun\n"); 720 return -1; 721 } 722 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 723 } 724 } 725 log(LOG_ERR, "fdcresult: timeout\n"); 726 return (fdc->sc_nstat = -1); 727 } 728 729 int 730 out_fdc(fdc, x) 731 struct fdc_softc *fdc; 732 u_char x; 733 { 734 int i = 100000; 735 736 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 737 if (i <= 0) 738 return -1; 739 740 *fdc->sc_reg_fifo = x; 741 return 0; 742 } 743 744 int 745 Fdopen(dev, flags) 746 dev_t dev; 747 int flags; 748 { 749 int unit; 750 struct fd_softc *fd; 751 struct fd_type *type; 752 753 unit = FDUNIT(dev); 754 if (unit >= fdcd.cd_ndevs) 755 return ENXIO; 756 fd = fdcd.cd_devs[unit]; 757 if (fd == 0) 758 return ENXIO; 759 type = fd_dev_to_type(fd, dev); 760 if (type == NULL) 761 return ENXIO; 762 763 if ((fd->sc_flags & FD_OPEN) != 0 && 764 fd->sc_type != type) 765 return EBUSY; 766 767 fd->sc_type = type; 768 fd->sc_cylin = -1; 769 fd->sc_flags |= FD_OPEN; 770 771 return 0; 772 } 773 774 int 775 fdclose(dev, flags) 776 dev_t dev; 777 int flags; 778 { 779 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 780 781 fd->sc_flags &= ~FD_OPEN; 782 return 0; 783 } 784 785 int 786 fdread(dev, uio) 787 dev_t dev; 788 struct uio *uio; 789 { 790 791 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 792 } 793 794 int 795 fdwrite(dev, uio) 796 dev_t dev; 797 struct uio *uio; 798 { 799 800 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 801 } 802 803 void 804 fdcstart(fdc) 805 struct fdc_softc *fdc; 806 { 807 808 #ifdef DIAGNOSTIC 809 /* only got here if controller's drive queue was inactive; should 810 be in idle state */ 811 if (fdc->sc_state != DEVIDLE) { 812 printf("fdcstart: not idle\n"); 813 return; 814 } 815 #endif 816 (void) fdcswintr(fdc); 817 } 818 819 void 820 fdcstatus(dv, n, s) 821 struct device *dv; 822 int n; 823 char *s; 824 { 825 struct fdc_softc *fdc = (void *)dv->dv_parent; 826 827 #if 0 828 /* 829 * A 82072 seems to return <invalid command> on 830 * gratuitous Sense Interrupt commands. 831 */ 832 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 833 out_fdc(fdc, NE7CMD_SENSEI); 834 (void) fdcresult(fdc); 835 n = 2; 836 } 837 #endif 838 839 /* Just print last status */ 840 n = fdc->sc_nstat; 841 842 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 843 844 switch (n) { 845 case 0: 846 printf("\n"); 847 break; 848 case 2: 849 printf(" (st0 %b cyl %d)\n", 850 fdc->sc_status[0], NE7_ST0BITS, 851 fdc->sc_status[1]); 852 break; 853 case 7: 854 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 855 fdc->sc_status[0], NE7_ST0BITS, 856 fdc->sc_status[1], NE7_ST1BITS, 857 fdc->sc_status[2], NE7_ST2BITS, 858 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 859 break; 860 #ifdef DIAGNOSTIC 861 default: 862 printf(" fdcstatus: weird size: %d\n", n); 863 break; 864 #endif 865 } 866 } 867 868 void 869 fdctimeout(arg) 870 void *arg; 871 { 872 struct fdc_softc *fdc = arg; 873 struct fd_softc *fd = fdc->sc_drives.tqh_first; 874 int s; 875 876 s = splbio(); 877 fdcstatus(&fd->sc_dk.dk_dev, 0, "timeout"); 878 879 if (fd->sc_q.b_actf) 880 fdc->sc_state++; 881 else 882 fdc->sc_state = DEVIDLE; 883 884 (void) fdcswintr(fdc); 885 splx(s); 886 } 887 888 void 889 fdcpseudointr(arg) 890 void *arg; 891 { 892 struct fdc_softc *fdc = arg; 893 int s; 894 895 /* Just ensure it has the right spl. */ 896 s = splbio(); 897 (void) fdcswintr(fdc); 898 splx(s); 899 } 900 901 902 #ifdef FDC_C_HANDLER 903 /* 904 * hardware interrupt entry point: must be converted to `fast' 905 * (in-window) handler. 906 */ 907 int 908 fdchwintr(fdc) 909 struct fdc_softc *fdc; 910 { 911 struct buf *bp; 912 int read; 913 914 switch (fdc->sc_istate) { 915 case ISTATE_SENSEI: 916 out_fdc(fdc, NE7CMD_SENSEI); 917 fdcresult(fdc); 918 fdc->sc_istate = ISTATE_IDLE; 919 ienab_bis(IE_FDSOFT); 920 return 1; 921 case ISTATE_IDLE: 922 case ISTATE_SPURIOUS: 923 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 924 fdcresult(fdc); 925 fdc->sc_istate = ISTATE_SPURIOUS; 926 printf("fdc: stray hard interrupt... "); 927 ienab_bis(IE_FDSOFT); 928 return 1; 929 case ISTATE_DMA: 930 break; 931 default: 932 printf("fdc: goofed ...\n"); 933 return 1; 934 } 935 936 read = bp->b_flags & B_READ; 937 for (;;) { 938 register int msr; 939 940 msr = *fdc->sc_reg_msr; 941 942 if ((msr & NE7_RQM) == 0) 943 break; 944 945 if ((msr & NE7_NDM) == 0) { 946 fdcresult(fdc); 947 fdc->sc_istate = ISTATE_IDLE; 948 ienab_bis(IE_FDSOFT); 949 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 950 break; 951 } 952 953 if (msr & NE7_DIO) { 954 #ifdef DIAGNOSTIC 955 if (!read) 956 printf("fdxfer: false read\n"); 957 #endif 958 *fdc->sc_data++ = *fdc->sc_reg_fifo; 959 } else { 960 #ifdef DIAGNOSTIC 961 if (read) 962 printf("fdxfer: false write\n"); 963 #endif 964 *fdc->sc_reg_fifo = *fdc->sc_data++; 965 } 966 if (--fdc->sc_tc == 0) { 967 auxregbisc(AUXIO_FTC, 0); 968 fdc->sc_istate = ISTATE_IDLE; 969 delay(10); 970 auxregbisc(0, AUXIO_FTC); 971 fdcresult(fdc); 972 ienab_bis(IE_FDSOFT); 973 break; 974 } 975 } 976 return 1; 977 } 978 #endif 979 980 int 981 fdcswintr(fdc) 982 struct fdc_softc *fdc; 983 { 984 #define st0 fdc->sc_status[0] 985 #define st1 fdc->sc_status[1] 986 #define cyl fdc->sc_status[1] 987 #define OUT_FDC(fdc, c, s) \ 988 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 989 990 struct fd_softc *fd; 991 struct buf *bp; 992 int read, head, trac, sec, i, s, nblks; 993 struct fd_type *type; 994 995 loop: 996 if (fdc->sc_istate != ISTATE_IDLE) { 997 /* Trouble... */ 998 printf("fdc: spurious interrupt: istate=%d\n", fdc->sc_istate); 999 fdc->sc_istate = ISTATE_IDLE; 1000 goto doreset; 1001 } 1002 1003 /* Is there a drive for the controller to do a transfer with? */ 1004 fd = fdc->sc_drives.tqh_first; 1005 if (fd == NULL) { 1006 fdc->sc_state = DEVIDLE; 1007 return 0; 1008 } 1009 1010 /* Is there a transfer to this drive? If not, deactivate drive. */ 1011 bp = fd->sc_q.b_actf; 1012 if (bp == NULL) { 1013 fd->sc_ops = 0; 1014 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1015 fd->sc_q.b_active = 0; 1016 goto loop; 1017 } 1018 1019 switch (fdc->sc_state) { 1020 case DEVIDLE: 1021 fdc->sc_errors = 0; 1022 fd->sc_skip = 0; 1023 fd->sc_bcount = bp->b_bcount; 1024 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1025 untimeout(fd_motor_off, fd); 1026 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1027 fdc->sc_state = MOTORWAIT; 1028 return 1; 1029 } 1030 if ((fd->sc_flags & FD_MOTOR) == 0) { 1031 /* Turn on the motor, being careful about pairing. */ 1032 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1033 if (ofd && ofd->sc_flags & FD_MOTOR) { 1034 untimeout(fd_motor_off, ofd); 1035 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1036 } 1037 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1038 fd_set_motor(fdc, 0); 1039 fdc->sc_state = MOTORWAIT; 1040 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1041 /* Allow .25s for motor to stabilize. */ 1042 timeout(fd_motor_on, fd, hz / 4); 1043 } else { 1044 fd->sc_flags &= ~FD_MOTOR_WAIT; 1045 goto loop; 1046 } 1047 return 1; 1048 } 1049 /* Make sure the right drive is selected. */ 1050 fd_set_motor(fdc, 0); 1051 1052 /* fall through */ 1053 case DOSEEK: 1054 doseek: 1055 if (fdc->sc_flags & FDC_EIS) { 1056 fd->sc_cylin = bp->b_cylin; 1057 /* We use implied seek */ 1058 goto doio; 1059 } 1060 1061 if (fd->sc_cylin == bp->b_cylin) 1062 goto doio; 1063 1064 /* specify command */ 1065 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1066 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1067 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1068 1069 fdc->sc_istate = ISTATE_SENSEI; 1070 /* seek function */ 1071 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1072 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1073 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1074 1075 fd->sc_cylin = -1; 1076 fdc->sc_state = SEEKWAIT; 1077 fdc->sc_nstat = 0; 1078 timeout(fdctimeout, fdc, 4 * hz); 1079 return 1; 1080 1081 case DOIO: 1082 doio: 1083 type = fd->sc_type; 1084 sec = fd->sc_blkno % type->seccyl; 1085 nblks = type->seccyl - sec; 1086 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1087 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1088 fd->sc_nblks = nblks; 1089 fd->sc_nbytes = nblks * FDC_BSIZE; 1090 head = sec / type->sectrac; 1091 sec -= head * type->sectrac; 1092 #ifdef DIAGNOSTIC 1093 {int block; 1094 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1095 if (block != fd->sc_blkno) { 1096 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1097 #ifdef DDB 1098 Debugger(); 1099 #endif 1100 }} 1101 #endif 1102 read = bp->b_flags & B_READ; 1103 1104 /* Setup for pseudo DMA */ 1105 fdc->sc_data = bp->b_data + fd->sc_skip; 1106 fdc->sc_tc = fd->sc_nbytes; 1107 1108 *fdc->sc_reg_drs = type->rate; 1109 #ifdef FD_DEBUG 1110 if (fdc_debug > 1) 1111 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1112 read ? "read" : "write", fd->sc_drive, 1113 fd->sc_cylin, head, sec, nblks); 1114 #endif 1115 fdc->sc_state = IOCOMPLETE; 1116 fdc->sc_istate = ISTATE_DMA; 1117 fdc->sc_nstat = 0; 1118 if (read) 1119 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1120 else 1121 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1122 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1123 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1124 OUT_FDC(fdc, head, IOTIMEDOUT); 1125 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1126 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1127 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1128 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1129 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1130 /* allow 2 seconds for operation */ 1131 timeout(fdctimeout, fdc, 2 * hz); 1132 return 1; /* will return later */ 1133 1134 case SEEKWAIT: 1135 untimeout(fdctimeout, fdc); 1136 fdc->sc_state = SEEKCOMPLETE; 1137 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1138 /* allow 1/50 second for heads to settle */ 1139 timeout(fdcpseudointr, fdc, hz / 50); 1140 return 1; /* will return later */ 1141 } 1142 1143 case SEEKCOMPLETE: 1144 /* Make sure seek really happened. */ 1145 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1146 cyl != bp->b_cylin * fd->sc_type->step) { 1147 #ifdef FD_DEBUG 1148 if (fdc_debug) 1149 fdcstatus(&fd->sc_dk.dk_dev, 2, "seek failed"); 1150 #endif 1151 fdcretry(fdc); 1152 goto loop; 1153 } 1154 fd->sc_cylin = bp->b_cylin; 1155 goto doio; 1156 1157 case IOTIMEDOUT: 1158 auxregbisc(AUXIO_FTC, 0); 1159 delay(10); 1160 auxregbisc(0, AUXIO_FTC); 1161 (void)fdcresult(fdc); 1162 case SEEKTIMEDOUT: 1163 case RECALTIMEDOUT: 1164 case RESETTIMEDOUT: 1165 fdcretry(fdc); 1166 goto loop; 1167 1168 case IOCOMPLETE: /* IO DONE, post-analyze */ 1169 untimeout(fdctimeout, fdc); 1170 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1171 #ifdef FD_DEBUG 1172 if (fdc_debug) { 1173 fdcstatus(&fd->sc_dk.dk_dev, 7, 1174 bp->b_flags & B_READ 1175 ? "read failed" : "write failed"); 1176 printf("blkno %d nblks %d tc %d\n", 1177 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1178 } 1179 #endif 1180 if (fdc->sc_nstat == 7 && 1181 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1182 1183 /* 1184 * Silently retry overruns if no other 1185 * error bit is set. Adjust threshold. 1186 */ 1187 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1188 if (thr < 15) { 1189 thr++; 1190 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1191 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1192 #ifdef FD_DEBUG 1193 if (fdc_debug) 1194 printf("fdc: %d -> threshold\n", thr); 1195 #endif 1196 fdconf(fdc); 1197 fdc->sc_state = DOIO; 1198 fdc->sc_overruns = 0; 1199 } 1200 if (++fdc->sc_overruns < 3) 1201 goto loop; 1202 } 1203 fdcretry(fdc); 1204 goto loop; 1205 } 1206 if (fdc->sc_errors) { 1207 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1208 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1209 printf("\n"); 1210 fdc->sc_errors = 0; 1211 } else { 1212 if (--fdc->sc_overruns < -5) { 1213 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1214 if (thr > 0) { 1215 thr--; 1216 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1217 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1218 #ifdef FD_DEBUG 1219 if (fdc_debug) 1220 printf("fdc: %d -> threshold\n", thr); 1221 #endif 1222 fdconf(fdc); 1223 } 1224 fdc->sc_overruns = 0; 1225 } 1226 } 1227 fd->sc_blkno += fd->sc_nblks; 1228 fd->sc_skip += fd->sc_nbytes; 1229 fd->sc_bcount -= fd->sc_nbytes; 1230 if (fd->sc_bcount > 0) { 1231 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1232 goto doseek; 1233 } 1234 fdfinish(fd, bp); 1235 goto loop; 1236 1237 case DORESET: 1238 doreset: 1239 /* try a reset, keep motor on */ 1240 fd_set_motor(fdc, 1); 1241 delay(100); 1242 fd_set_motor(fdc, 0); 1243 fdc->sc_state = RESETCOMPLETE; 1244 timeout(fdctimeout, fdc, hz / 2); 1245 return 1; /* will return later */ 1246 1247 case RESETCOMPLETE: 1248 untimeout(fdctimeout, fdc); 1249 /* clear the controller output buffer */ 1250 for (i = 0; i < 4; i++) { 1251 out_fdc(fdc, NE7CMD_SENSEI); 1252 (void) fdcresult(fdc); 1253 } 1254 1255 /* fall through */ 1256 case DORECAL: 1257 fdc->sc_state = RECALWAIT; 1258 fdc->sc_istate = ISTATE_SENSEI; 1259 fdc->sc_nstat = 0; 1260 /* recalibrate function */ 1261 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1262 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1263 timeout(fdctimeout, fdc, 5 * hz); 1264 return 1; /* will return later */ 1265 1266 case RECALWAIT: 1267 untimeout(fdctimeout, fdc); 1268 fdc->sc_state = RECALCOMPLETE; 1269 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1270 /* allow 1/30 second for heads to settle */ 1271 timeout(fdcpseudointr, fdc, hz / 30); 1272 return 1; /* will return later */ 1273 } 1274 1275 case RECALCOMPLETE: 1276 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1277 #ifdef FD_DEBUG 1278 if (fdc_debug) 1279 fdcstatus(&fd->sc_dk.dk_dev, 2, "recalibrate failed"); 1280 #endif 1281 fdcretry(fdc); 1282 goto loop; 1283 } 1284 fd->sc_cylin = 0; 1285 goto doseek; 1286 1287 case MOTORWAIT: 1288 if (fd->sc_flags & FD_MOTOR_WAIT) 1289 return 1; /* time's not up yet */ 1290 goto doseek; 1291 1292 default: 1293 fdcstatus(&fd->sc_dk.dk_dev, 0, "stray interrupt"); 1294 return 1; 1295 } 1296 #ifdef DIAGNOSTIC 1297 panic("fdcintr: impossible"); 1298 #endif 1299 #undef st0 1300 #undef st1 1301 #undef cyl 1302 } 1303 1304 void 1305 fdcretry(fdc) 1306 struct fdc_softc *fdc; 1307 { 1308 struct fd_softc *fd; 1309 struct buf *bp; 1310 1311 fd = fdc->sc_drives.tqh_first; 1312 bp = fd->sc_q.b_actf; 1313 1314 fdc->sc_overruns = 0; 1315 1316 switch (fdc->sc_errors) { 1317 case 0: 1318 /* try again */ 1319 fdc->sc_state = 1320 (fdc->sc_flags & FDC_EIS) ? DOIO : SEEKCOMPLETE; 1321 break; 1322 1323 case 1: case 2: case 3: 1324 /* didn't work; try recalibrating */ 1325 fdc->sc_state = DORECAL; 1326 break; 1327 1328 case 4: 1329 /* still no go; reset the bastard */ 1330 fdc->sc_state = DORESET; 1331 break; 1332 1333 default: 1334 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1335 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1336 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 1337 fdc->sc_status[0], NE7_ST0BITS, 1338 fdc->sc_status[1], NE7_ST1BITS, 1339 fdc->sc_status[2], NE7_ST2BITS, 1340 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1341 1342 bp->b_flags |= B_ERROR; 1343 bp->b_error = EIO; 1344 fdfinish(fd, bp); 1345 } 1346 fdc->sc_errors++; 1347 } 1348 1349 int 1350 fdsize(dev) 1351 dev_t dev; 1352 { 1353 1354 /* Swapping to floppies would not make sense. */ 1355 return -1; 1356 } 1357 1358 int 1359 fddump() 1360 { 1361 1362 /* Not implemented. */ 1363 return EINVAL; 1364 } 1365 1366 int 1367 fdioctl(dev, cmd, addr, flag) 1368 dev_t dev; 1369 u_long cmd; 1370 caddr_t addr; 1371 int flag; 1372 { 1373 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 1374 struct disklabel buffer; 1375 int error; 1376 1377 switch (cmd) { 1378 case DIOCGDINFO: 1379 bzero(&buffer, sizeof(buffer)); 1380 1381 buffer.d_secpercyl = fd->sc_type->seccyl; 1382 buffer.d_type = DTYPE_FLOPPY; 1383 buffer.d_secsize = FDC_BSIZE; 1384 1385 if (readdisklabel(dev, fdstrategy, &buffer, NULL) != NULL) 1386 return EINVAL; 1387 1388 *(struct disklabel *)addr = buffer; 1389 return 0; 1390 1391 case DIOCWLABEL: 1392 if ((flag & FWRITE) == 0) 1393 return EBADF; 1394 /* XXX do something */ 1395 return 0; 1396 1397 case DIOCWDINFO: 1398 if ((flag & FWRITE) == 0) 1399 return EBADF; 1400 1401 error = setdisklabel(&buffer, (struct disklabel *)addr, 0, NULL); 1402 if (error) 1403 return error; 1404 1405 error = writedisklabel(dev, fdstrategy, &buffer, NULL); 1406 return error; 1407 1408 case FDIOCEJECT: 1409 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1410 delay(10); 1411 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1412 return 0; 1413 #ifdef DEBUG 1414 case _IO('f', 100): 1415 { 1416 int i; 1417 struct fdc_softc *fdc = (struct fdc_softc *) 1418 fd->sc_dk.dk_dev.dv_parent; 1419 1420 out_fdc(fdc, NE7CMD_DUMPREG); 1421 fdcresult(fdc); 1422 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1423 for (i = 0; i < fdc->sc_nstat; i++) 1424 printf(" %x", fdc->sc_status[i]); 1425 printf(">\n"); 1426 } 1427 1428 return 0; 1429 case _IOW('f', 101, int): 1430 ((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent)->sc_cfg &= 1431 ~CFG_THRHLD_MASK; 1432 ((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent)->sc_cfg |= 1433 (*(int *)addr & CFG_THRHLD_MASK); 1434 fdconf(fd->sc_dk.dk_dev.dv_parent); 1435 return 0; 1436 case _IO('f', 102): 1437 { 1438 int i; 1439 struct fdc_softc *fdc = (struct fdc_softc *) 1440 fd->sc_dk.dk_dev.dv_parent; 1441 out_fdc(fdc, NE7CMD_SENSEI); 1442 fdcresult(fdc); 1443 printf("sensei(%d regs): <", fdc->sc_nstat); 1444 for (i=0; i< fdc->sc_nstat; i++) 1445 printf(" 0x%x", fdc->sc_status[i]); 1446 } 1447 printf(">\n"); 1448 return 0; 1449 #endif 1450 default: 1451 return ENOTTY; 1452 } 1453 1454 #ifdef DIAGNOSTIC 1455 panic("fdioctl: impossible"); 1456 #endif 1457 } 1458
Indexes created Fri Oct 03 02:09:57 GMT 2025