fd.c revision 1.14
1 /* $NetBSD: fd.c,v 1.14 1995/11/11 21:12:50 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 device sc_dev; /* 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)); 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 fdc_reset __P((struct fdc_softc *fdc)); 214 void fdctimeout __P((void *arg)); 215 void fdcpseudointr __P((void *arg)); 216 #ifdef FDC_C_HANDLER 217 int fdchwintr __P((struct fdc_softc *)); 218 #else 219 void fdchwintr __P((void)); 220 #endif 221 int fdcswintr __P((struct fdc_softc *)); 222 void fdcretry __P((struct fdc_softc *fdc)); 223 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 224 225 #if PIL_FDSOFT == 4 226 #define IE_FDSOFT IE_L4 227 #else 228 #error 4 229 #endif 230 231 #define OBP_FDNAME (cputyp == CPU_SUN4M ? "SUNW,fdtwo" : "fd") 232 233 int 234 fdcmatch(parent, match, aux) 235 struct device *parent; 236 void *match, *aux; 237 { 238 struct cfdata *cf = match; 239 register struct confargs *ca = aux; 240 register struct romaux *ra = &ca->ca_ra; 241 242 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 243 if (strcmp(OBP_FDNAME, ra->ra_name)) 244 return (0); 245 if (ca->ca_bustype == BUS_MAIN) { 246 if (ca->ca_ra.ra_vaddr && 247 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 248 return (0); 249 } 250 return (1); 251 } 252 253 return (0); 254 } 255 256 /* 257 * Arguments passed between fdcattach and fdprobe. 258 */ 259 struct fdc_attach_args { 260 int fa_drive; 261 int fa_bootdev; 262 struct fd_type *fa_deftype; 263 }; 264 265 /* 266 * Print the location of a disk drive (called just before attaching the 267 * the drive). If `fdc' is not NULL, the drive was found but was not 268 * in the system config file; print the drive name as well. 269 * Return QUIET (config_find ignores this if the device was configured) to 270 * avoid printing `fdN not configured' messages. 271 */ 272 int 273 fdprint(aux, fdc) 274 void *aux; 275 char *fdc; 276 { 277 register struct fdc_attach_args *fa = aux; 278 279 if (!fdc) 280 printf(" drive %d", fa->fa_drive); 281 return QUIET; 282 } 283 284 static void 285 fdconf(fdc) 286 struct fdc_softc *fdc; 287 { 288 int vroom; 289 290 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 291 return; 292 293 /* 294 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 295 * the PROM thinks is appropriate. 296 */ 297 if ((vroom = fdc->sc_status[7]) == 0) 298 vroom = 0x64; 299 300 /* Configure controller to use FIFO and Implied Seek */ 301 out_fdc(fdc, NE7CMD_CFG); 302 out_fdc(fdc, vroom); 303 out_fdc(fdc, fdc->sc_cfg); 304 out_fdc(fdc, 0); /* PRETRK */ 305 /* No result phase */ 306 } 307 308 void 309 fdcattach(parent, self, aux) 310 struct device *parent, *self; 311 void *aux; 312 { 313 register struct confargs *ca = aux; 314 struct fdc_softc *fdc = (void *)self; 315 struct fdc_attach_args fa; 316 int n, pri; 317 char code; 318 319 if (ca->ca_ra.ra_vaddr) 320 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 321 else 322 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_paddr, 323 ca->ca_ra.ra_len, 324 ca->ca_bustype); 325 326 fdc->sc_state = DEVIDLE; 327 fdc->sc_istate = ISTATE_IDLE; 328 fdc->sc_flags |= FDC_EIS; 329 TAILQ_INIT(&fdc->sc_drives); 330 331 pri = ca->ca_ra.ra_intr[0].int_pri; 332 #ifdef FDC_C_HANDLER 333 fdc->sc_hih.ih_fun = (void *)fdchwintr; 334 fdc->sc_hih.ih_arg = fdc; 335 intr_establish(pri, &fdc->sc_hih); 336 #else 337 fdciop = &fdc->sc_io; 338 intr_fasttrap(pri, fdchwintr); 339 #endif 340 fdc->sc_sih.ih_fun = (void *)fdcswintr; 341 fdc->sc_sih.ih_arg = fdc; 342 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 343 344 /* Assume a 82077 */ 345 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 346 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 347 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 348 349 code = '7'; 350 if (*fdc->sc_reg_dor == NE7_RQM) { 351 /* 352 * This hack from Chris Torek: apparently DOR really 353 * addresses MSR/DRS on a 82072. 354 * We used to rely on the VERSION command to tell the 355 * difference (which did not work). 356 */ 357 *fdc->sc_reg_dor = FDC_250KBPS; 358 if (*fdc->sc_reg_dor == NE7_RQM) 359 code = '2'; 360 } 361 if (code == '7') { 362 fdc->sc_flags |= FDC_82077; 363 } else { 364 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 365 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 366 fdc->sc_reg_dor = 0; 367 } 368 369 #ifdef FD_DEBUG 370 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 371 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 372 if (fdc_debug) 373 printf("[version cmd]"); 374 } 375 #endif 376 377 /* 378 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 379 * Note: CFG_EFIFO is active-low, initial threshold value: 8 380 */ 381 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 382 fdconf(fdc); 383 384 if (fdc->sc_flags & FDC_82077) { 385 /* Lock configuration across soft resets. */ 386 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 387 if (fdcresult(fdc) != 1) 388 printf(" CFGLOCK: unexpected response"); 389 } 390 391 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 392 393 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 394 395 /* 396 * Controller and drives are represented by one and the same 397 * Openprom node, so we can as well check for the floppy boots here. 398 */ 399 if (ca->ca_ra.ra_bp && 400 strcmp(ca->ca_ra.ra_bp->name, OBP_FDNAME) == 0 && 401 ca->ca_ra.ra_bp->val[0] == 0 && 402 ca->ca_ra.ra_bp->val[1] == 0) 403 fa.fa_bootdev = 1; 404 else 405 fa.fa_bootdev = 0; 406 407 /* physical limit: four drives per controller. */ 408 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 409 fa.fa_deftype = NULL; /* unknown */ 410 fa.fa_deftype = &fd_types[0]; /* XXX */ 411 (void)config_found(self, (void *)&fa, fdprint); 412 } 413 } 414 415 int 416 fdmatch(parent, match, aux) 417 struct device *parent; 418 void *match, *aux; 419 { 420 struct fdc_softc *fdc = (void *)parent; 421 struct cfdata *cf = match; 422 struct fdc_attach_args *fa = aux; 423 int drive = fa->fa_drive; 424 int n; 425 426 if (drive > 0) 427 /* XXX - for now, punt > 1 drives */ 428 return 0; 429 430 if (fdc->sc_flags & FDC_82077) { 431 /* select drive and turn on motor */ 432 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 433 /* wait for motor to spin up */ 434 delay(250000); 435 } else { 436 auxregbisc(AUXIO_FDS, 0); 437 } 438 fdc->sc_nstat = 0; 439 out_fdc(fdc, NE7CMD_RECAL); 440 out_fdc(fdc, drive); 441 /* wait for recalibrate */ 442 for (n = 0; n < 100000; n++) { 443 delay(10); 444 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 445 /* wait a bit longer till device *really* is ready */ 446 delay(100000); 447 if (out_fdc(fdc, NE7CMD_SENSEI)) 448 break; 449 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 450 /* 451 * Got `invalid command'; we interpret it 452 * to mean that the re-calibrate hasn't in 453 * fact finished yet 454 */ 455 continue; 456 break; 457 } 458 } 459 n = fdc->sc_nstat; 460 #ifdef FD_DEBUG 461 if (fdc_debug) { 462 int i; 463 printf("fdprobe: %d stati:", n); 464 for (i = 0; i < n; i++) 465 printf(" %x", fdc->sc_status[i]); 466 printf("\n"); 467 } 468 #endif 469 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 470 return 0; 471 /* turn off motor */ 472 if (fdc->sc_flags & FDC_82077) { 473 /* select drive and turn on motor */ 474 *fdc->sc_reg_dor = FDO_FRST; 475 } else { 476 auxregbisc(0, AUXIO_FDS); 477 } 478 479 return 1; 480 } 481 482 /* 483 * Controller is working, and drive responded. Attach it. 484 */ 485 void 486 fdattach(parent, self, aux) 487 struct device *parent, *self; 488 void *aux; 489 { 490 struct fdc_softc *fdc = (void *)parent; 491 struct fd_softc *fd = (void *)self; 492 struct fdc_attach_args *fa = aux; 493 struct fd_type *type = fa->fa_deftype; 494 int drive = fa->fa_drive; 495 496 /* XXX Allow `flags' to override device type? */ 497 498 if (type) 499 printf(": %s %d cyl, %d head, %d sec\n", type->name, 500 type->tracks, type->heads, type->sectrac); 501 else 502 printf(": density unknown\n"); 503 504 fd->sc_cylin = -1; 505 fd->sc_drive = drive; 506 fd->sc_deftype = type; 507 fdc->sc_fd[drive] = fd; 508 fd->sc_dk.dk_driver = &fddkdriver; 509 510 /* 511 * We're told if we're the boot device in fdcattach(). 512 */ 513 if (fa->fa_bootdev) 514 bootdv = &fd->sc_dk.dk_dev; 515 516 /* XXX Need to do some more fiddling with sc_dk. */ 517 dk_establish(&fd->sc_dk, &fd->sc_dk.dk_dev); 518 } 519 520 inline struct fd_type * 521 fd_dev_to_type(fd, dev) 522 struct fd_softc *fd; 523 dev_t dev; 524 { 525 int type = FDTYPE(dev); 526 527 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 528 return NULL; 529 return type ? &fd_types[type - 1] : fd->sc_deftype; 530 } 531 532 void 533 fdstrategy(bp) 534 register struct buf *bp; /* IO operation to perform */ 535 { 536 struct fd_softc *fd; 537 int unit = FDUNIT(bp->b_dev); 538 int sz; 539 int s; 540 541 /* Valid unit, controller, and request? */ 542 if (unit >= fdcd.cd_ndevs || 543 (fd = fdcd.cd_devs[unit]) == 0 || 544 bp->b_blkno < 0 || 545 (bp->b_bcount % FDC_BSIZE) != 0) { 546 bp->b_error = EINVAL; 547 goto bad; 548 } 549 550 /* If it's a null transfer, return immediately. */ 551 if (bp->b_bcount == 0) 552 goto done; 553 554 sz = howmany(bp->b_bcount, FDC_BSIZE); 555 556 if (bp->b_blkno + sz > fd->sc_type->size) { 557 sz = fd->sc_type->size - bp->b_blkno; 558 if (sz == 0) { 559 /* If exactly at end of disk, return EOF. */ 560 bp->b_resid = bp->b_bcount; 561 goto done; 562 } 563 if (sz < 0) { 564 /* If past end of disk, return EINVAL. */ 565 bp->b_error = EINVAL; 566 goto bad; 567 } 568 /* Otherwise, truncate request. */ 569 bp->b_bcount = sz << DEV_BSHIFT; 570 } 571 572 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 573 574 #ifdef FD_DEBUG 575 if (fdc_debug > 1) 576 printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d\n", 577 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 578 #endif 579 580 /* Queue transfer on drive, activate drive and controller if idle. */ 581 s = splbio(); 582 disksort(&fd->sc_q, bp); 583 untimeout(fd_motor_off, fd); /* a good idea */ 584 if (!fd->sc_q.b_active) 585 fdstart(fd); 586 #ifdef DIAGNOSTIC 587 else { 588 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 589 if (fdc->sc_state == DEVIDLE) { 590 printf("fdstrategy: controller inactive\n"); 591 fdcstart(fdc); 592 } 593 } 594 #endif 595 splx(s); 596 return; 597 598 bad: 599 bp->b_flags |= B_ERROR; 600 done: 601 /* Toss transfer; we're done early. */ 602 biodone(bp); 603 } 604 605 void 606 fdstart(fd) 607 struct fd_softc *fd; 608 { 609 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 610 int active = fdc->sc_drives.tqh_first != 0; 611 612 /* Link into controller queue. */ 613 fd->sc_q.b_active = 1; 614 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 615 616 /* If controller not already active, start it. */ 617 if (!active) 618 fdcstart(fdc); 619 } 620 621 void 622 fdfinish(fd, bp) 623 struct fd_softc *fd; 624 struct buf *bp; 625 { 626 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 627 628 /* 629 * Move this drive to the end of the queue to give others a `fair' 630 * chance. We only force a switch if N operations are completed while 631 * another drive is waiting to be serviced, since there is a long motor 632 * startup delay whenever we switch. 633 */ 634 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 635 fd->sc_ops = 0; 636 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 637 if (bp->b_actf) { 638 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 639 } else 640 fd->sc_q.b_active = 0; 641 } 642 bp->b_resid = fd->sc_bcount; 643 fd->sc_skip = 0; 644 fd->sc_q.b_actf = bp->b_actf; 645 biodone(bp); 646 /* turn off motor 5s from now */ 647 timeout(fd_motor_off, fd, 5 * hz); 648 fdc->sc_state = DEVIDLE; 649 } 650 651 void 652 fdc_reset(fdc) 653 struct fdc_softc *fdc; 654 { 655 if (fdc->sc_flags & FDC_82077) { 656 *fdc->sc_reg_dor = FDO_MOEN(0); 657 } 658 659 *fdc->sc_reg_drs = DRS_RESET; 660 delay(10); 661 *fdc->sc_reg_drs = 0; 662 #ifdef FD_DEBUG 663 if (fdc_debug) 664 printf("fdc reset\n"); 665 #endif 666 } 667 668 void 669 fd_set_motor(fdc) 670 struct fdc_softc *fdc; 671 { 672 struct fd_softc *fd; 673 u_char status; 674 int n; 675 676 if (fdc->sc_flags & FDC_82077) { 677 status = FDO_FRST | FDO_FDMAEN; 678 if (fd = fdc->sc_drives.tqh_first) 679 status |= fd->sc_drive; 680 681 for (n = 0; n < 4; n++) 682 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 683 status |= FDO_MOEN(n); 684 *fdc->sc_reg_dor = status; 685 } else { 686 int on = 0; 687 688 for (n = 0; n < 4; n++) 689 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 690 on = 1; 691 if (on) { 692 auxregbisc(AUXIO_FDS, 0); 693 } else { 694 auxregbisc(0, AUXIO_FDS); 695 } 696 } 697 } 698 699 void 700 fd_motor_off(arg) 701 void *arg; 702 { 703 struct fd_softc *fd = arg; 704 int s; 705 706 s = splbio(); 707 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 708 fd_set_motor((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent); 709 splx(s); 710 } 711 712 void 713 fd_motor_on(arg) 714 void *arg; 715 { 716 struct fd_softc *fd = arg; 717 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 718 int s; 719 720 s = splbio(); 721 fd->sc_flags &= ~FD_MOTOR_WAIT; 722 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 723 (void) fdcswintr(fdc); 724 splx(s); 725 } 726 727 int 728 fdcresult(fdc) 729 struct fdc_softc *fdc; 730 { 731 u_char i; 732 int j = 100000, 733 n = 0; 734 735 for (; j; j--) { 736 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 737 if (i == NE7_RQM) 738 return (fdc->sc_nstat = n); 739 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 740 if (n >= sizeof(fdc->sc_status)) { 741 log(LOG_ERR, "fdcresult: overrun\n"); 742 return -1; 743 } 744 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 745 } 746 } 747 log(LOG_ERR, "fdcresult: timeout\n"); 748 return (fdc->sc_nstat = -1); 749 } 750 751 int 752 out_fdc(fdc, x) 753 struct fdc_softc *fdc; 754 u_char x; 755 { 756 int i = 100000; 757 758 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 759 if (i <= 0) 760 return -1; 761 762 *fdc->sc_reg_fifo = x; 763 return 0; 764 } 765 766 int 767 Fdopen(dev, flags) 768 dev_t dev; 769 int flags; 770 { 771 int unit; 772 struct fd_softc *fd; 773 struct fd_type *type; 774 775 unit = FDUNIT(dev); 776 if (unit >= fdcd.cd_ndevs) 777 return ENXIO; 778 fd = fdcd.cd_devs[unit]; 779 if (fd == 0) 780 return ENXIO; 781 type = fd_dev_to_type(fd, dev); 782 if (type == NULL) 783 return ENXIO; 784 785 if ((fd->sc_flags & FD_OPEN) != 0 && 786 fd->sc_type != type) 787 return EBUSY; 788 789 fd->sc_type = type; 790 fd->sc_cylin = -1; 791 fd->sc_flags |= FD_OPEN; 792 793 return 0; 794 } 795 796 int 797 fdclose(dev, flags) 798 dev_t dev; 799 int flags; 800 { 801 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 802 803 fd->sc_flags &= ~FD_OPEN; 804 return 0; 805 } 806 807 int 808 fdread(dev, uio) 809 dev_t dev; 810 struct uio *uio; 811 { 812 813 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 814 } 815 816 int 817 fdwrite(dev, uio) 818 dev_t dev; 819 struct uio *uio; 820 { 821 822 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 823 } 824 825 void 826 fdcstart(fdc) 827 struct fdc_softc *fdc; 828 { 829 830 #ifdef DIAGNOSTIC 831 /* only got here if controller's drive queue was inactive; should 832 be in idle state */ 833 if (fdc->sc_state != DEVIDLE) { 834 printf("fdcstart: not idle\n"); 835 return; 836 } 837 #endif 838 (void) fdcswintr(fdc); 839 } 840 841 void 842 fdcstatus(dv, n, s) 843 struct device *dv; 844 int n; 845 char *s; 846 { 847 struct fdc_softc *fdc = (void *)dv->dv_parent; 848 849 #if 0 850 /* 851 * A 82072 seems to return <invalid command> on 852 * gratuitous Sense Interrupt commands. 853 */ 854 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 855 out_fdc(fdc, NE7CMD_SENSEI); 856 (void) fdcresult(fdc); 857 n = 2; 858 } 859 #endif 860 861 /* Just print last status */ 862 n = fdc->sc_nstat; 863 864 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 865 866 switch (n) { 867 case 0: 868 printf("\n"); 869 break; 870 case 2: 871 printf(" (st0 %b cyl %d)\n", 872 fdc->sc_status[0], NE7_ST0BITS, 873 fdc->sc_status[1]); 874 break; 875 case 7: 876 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 877 fdc->sc_status[0], NE7_ST0BITS, 878 fdc->sc_status[1], NE7_ST1BITS, 879 fdc->sc_status[2], NE7_ST2BITS, 880 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 881 break; 882 #ifdef DIAGNOSTIC 883 default: 884 printf(" fdcstatus: weird size: %d\n", n); 885 break; 886 #endif 887 } 888 } 889 890 void 891 fdctimeout(arg) 892 void *arg; 893 { 894 struct fdc_softc *fdc = arg; 895 struct fd_softc *fd = fdc->sc_drives.tqh_first; 896 int s; 897 898 s = splbio(); 899 fdcstatus(&fd->sc_dk.dk_dev, 0, "timeout"); 900 901 if (fd->sc_q.b_actf) 902 fdc->sc_state++; 903 else 904 fdc->sc_state = DEVIDLE; 905 906 (void) fdcswintr(fdc); 907 splx(s); 908 } 909 910 void 911 fdcpseudointr(arg) 912 void *arg; 913 { 914 struct fdc_softc *fdc = arg; 915 int s; 916 917 /* Just ensure it has the right spl. */ 918 s = splbio(); 919 (void) fdcswintr(fdc); 920 splx(s); 921 } 922 923 924 #ifdef FDC_C_HANDLER 925 /* 926 * hardware interrupt entry point: must be converted to `fast' 927 * (in-window) handler. 928 */ 929 int 930 fdchwintr(fdc) 931 struct fdc_softc *fdc; 932 { 933 struct buf *bp; 934 int read; 935 936 switch (fdc->sc_istate) { 937 case ISTATE_SENSEI: 938 out_fdc(fdc, NE7CMD_SENSEI); 939 fdcresult(fdc); 940 fdc->sc_istate = ISTATE_IDLE; 941 ienab_bis(IE_FDSOFT); 942 return 1; 943 case ISTATE_IDLE: 944 case ISTATE_SPURIOUS: 945 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 946 fdcresult(fdc); 947 fdc->sc_istate = ISTATE_SPURIOUS; 948 printf("fdc: stray hard interrupt... "); 949 ienab_bis(IE_FDSOFT); 950 return 1; 951 case ISTATE_DMA: 952 break; 953 default: 954 printf("fdc: goofed ...\n"); 955 return 1; 956 } 957 958 read = bp->b_flags & B_READ; 959 for (;;) { 960 register int msr; 961 962 msr = *fdc->sc_reg_msr; 963 964 if ((msr & NE7_RQM) == 0) 965 break; 966 967 if ((msr & NE7_NDM) == 0) { 968 fdcresult(fdc); 969 fdc->sc_istate = ISTATE_IDLE; 970 ienab_bis(IE_FDSOFT); 971 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 972 break; 973 } 974 975 if (msr & NE7_DIO) { 976 #ifdef DIAGNOSTIC 977 if (!read) 978 printf("fdxfer: false read\n"); 979 #endif 980 *fdc->sc_data++ = *fdc->sc_reg_fifo; 981 } else { 982 #ifdef DIAGNOSTIC 983 if (read) 984 printf("fdxfer: false write\n"); 985 #endif 986 *fdc->sc_reg_fifo = *fdc->sc_data++; 987 } 988 if (--fdc->sc_tc == 0) { 989 auxregbisc(AUXIO_FTC, 0); 990 fdc->sc_istate = ISTATE_IDLE; 991 delay(10); 992 auxregbisc(0, AUXIO_FTC); 993 fdcresult(fdc); 994 ienab_bis(IE_FDSOFT); 995 break; 996 } 997 } 998 return 1; 999 } 1000 #endif 1001 1002 int 1003 fdcswintr(fdc) 1004 struct fdc_softc *fdc; 1005 { 1006 #define st0 fdc->sc_status[0] 1007 #define st1 fdc->sc_status[1] 1008 #define cyl fdc->sc_status[1] 1009 #define OUT_FDC(fdc, c, s) \ 1010 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1011 1012 struct fd_softc *fd; 1013 struct buf *bp; 1014 int read, head, trac, sec, i, s, nblks; 1015 struct fd_type *type; 1016 1017 1018 if (fdc->sc_istate != ISTATE_IDLE) { 1019 /* Trouble... */ 1020 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1021 fdc->sc_state, fdc->sc_istate); 1022 fdc->sc_istate = ISTATE_IDLE; 1023 if (fdc->sc_state == RESETCOMPLETE || 1024 fdc->sc_state == RESETTIMEDOUT) { 1025 panic("fdcintr: spurious interrupt can't be cleared"); 1026 } 1027 goto doreset; 1028 } 1029 1030 loop: 1031 /* Is there a drive for the controller to do a transfer with? */ 1032 fd = fdc->sc_drives.tqh_first; 1033 if (fd == NULL) { 1034 fdc->sc_state = DEVIDLE; 1035 return 0; 1036 } 1037 1038 /* Is there a transfer to this drive? If not, deactivate drive. */ 1039 bp = fd->sc_q.b_actf; 1040 if (bp == NULL) { 1041 fd->sc_ops = 0; 1042 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1043 fd->sc_q.b_active = 0; 1044 goto loop; 1045 } 1046 1047 switch (fdc->sc_state) { 1048 case DEVIDLE: 1049 fdc->sc_errors = 0; 1050 fd->sc_skip = 0; 1051 fd->sc_bcount = bp->b_bcount; 1052 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1053 untimeout(fd_motor_off, fd); 1054 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1055 fdc->sc_state = MOTORWAIT; 1056 return 1; 1057 } 1058 if ((fd->sc_flags & FD_MOTOR) == 0) { 1059 /* Turn on the motor, being careful about pairing. */ 1060 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1061 if (ofd && ofd->sc_flags & FD_MOTOR) { 1062 untimeout(fd_motor_off, ofd); 1063 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1064 } 1065 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1066 fd_set_motor(fdc); 1067 fdc->sc_state = MOTORWAIT; 1068 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1069 /* Allow .25s for motor to stabilize. */ 1070 timeout(fd_motor_on, fd, hz / 4); 1071 } else { 1072 fd->sc_flags &= ~FD_MOTOR_WAIT; 1073 goto loop; 1074 } 1075 return 1; 1076 } 1077 /* Make sure the right drive is selected. */ 1078 fd_set_motor(fdc); 1079 1080 /* fall through */ 1081 case DOSEEK: 1082 doseek: 1083 if (fdc->sc_flags & FDC_EIS) { 1084 fd->sc_cylin = bp->b_cylin; 1085 /* We use implied seek */ 1086 goto doio; 1087 } 1088 1089 if (fd->sc_cylin == bp->b_cylin) 1090 goto doio; 1091 1092 /* specify command */ 1093 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1094 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1095 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1096 1097 fdc->sc_istate = ISTATE_SENSEI; 1098 /* seek function */ 1099 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1100 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1101 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1102 1103 fd->sc_cylin = -1; 1104 fdc->sc_state = SEEKWAIT; 1105 fdc->sc_nstat = 0; 1106 timeout(fdctimeout, fdc, 4 * hz); 1107 return 1; 1108 1109 case DOIO: 1110 doio: 1111 type = fd->sc_type; 1112 sec = fd->sc_blkno % type->seccyl; 1113 nblks = type->seccyl - sec; 1114 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1115 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1116 fd->sc_nblks = nblks; 1117 fd->sc_nbytes = nblks * FDC_BSIZE; 1118 head = sec / type->sectrac; 1119 sec -= head * type->sectrac; 1120 #ifdef DIAGNOSTIC 1121 {int block; 1122 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1123 if (block != fd->sc_blkno) { 1124 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1125 #ifdef DDB 1126 Debugger(); 1127 #endif 1128 }} 1129 #endif 1130 read = bp->b_flags & B_READ; 1131 1132 /* Setup for pseudo DMA */ 1133 fdc->sc_data = bp->b_data + fd->sc_skip; 1134 fdc->sc_tc = fd->sc_nbytes; 1135 1136 *fdc->sc_reg_drs = type->rate; 1137 #ifdef FD_DEBUG 1138 if (fdc_debug > 1) 1139 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1140 read ? "read" : "write", fd->sc_drive, 1141 fd->sc_cylin, head, sec, nblks); 1142 #endif 1143 fdc->sc_state = IOCOMPLETE; 1144 fdc->sc_istate = ISTATE_DMA; 1145 fdc->sc_nstat = 0; 1146 if (read) 1147 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1148 else 1149 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1150 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1151 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1152 OUT_FDC(fdc, head, IOTIMEDOUT); 1153 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1154 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1155 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1156 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1157 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1158 /* allow 2 seconds for operation */ 1159 timeout(fdctimeout, fdc, 2 * hz); 1160 return 1; /* will return later */ 1161 1162 case SEEKWAIT: 1163 untimeout(fdctimeout, fdc); 1164 fdc->sc_state = SEEKCOMPLETE; 1165 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1166 /* allow 1/50 second for heads to settle */ 1167 timeout(fdcpseudointr, fdc, hz / 50); 1168 return 1; /* will return later */ 1169 } 1170 1171 case SEEKCOMPLETE: 1172 /* Make sure seek really happened. */ 1173 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1174 cyl != bp->b_cylin * fd->sc_type->step) { 1175 #ifdef FD_DEBUG 1176 if (fdc_debug) 1177 fdcstatus(&fd->sc_dk.dk_dev, 2, "seek failed"); 1178 #endif 1179 fdcretry(fdc); 1180 goto loop; 1181 } 1182 fd->sc_cylin = bp->b_cylin; 1183 goto doio; 1184 1185 case IOTIMEDOUT: 1186 auxregbisc(AUXIO_FTC, 0); 1187 delay(10); 1188 auxregbisc(0, AUXIO_FTC); 1189 (void)fdcresult(fdc); 1190 case SEEKTIMEDOUT: 1191 case RECALTIMEDOUT: 1192 case RESETTIMEDOUT: 1193 fdcretry(fdc); 1194 goto loop; 1195 1196 case IOCOMPLETE: /* IO DONE, post-analyze */ 1197 untimeout(fdctimeout, fdc); 1198 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1199 #ifdef FD_DEBUG 1200 if (fdc_debug) { 1201 fdcstatus(&fd->sc_dk.dk_dev, 7, 1202 bp->b_flags & B_READ 1203 ? "read failed" : "write failed"); 1204 printf("blkno %d nblks %d tc %d\n", 1205 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1206 } 1207 #endif 1208 if (fdc->sc_nstat == 7 && 1209 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1210 1211 /* 1212 * Silently retry overruns if no other 1213 * error bit is set. Adjust threshold. 1214 */ 1215 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1216 if (thr < 15) { 1217 thr++; 1218 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1219 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1220 #ifdef FD_DEBUG 1221 if (fdc_debug) 1222 printf("fdc: %d -> threshold\n", thr); 1223 #endif 1224 fdconf(fdc); 1225 fdc->sc_state = DOIO; 1226 fdc->sc_overruns = 0; 1227 } 1228 if (++fdc->sc_overruns < 3) 1229 goto loop; 1230 } 1231 fdcretry(fdc); 1232 goto loop; 1233 } 1234 if (fdc->sc_errors) { 1235 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1236 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1237 printf("\n"); 1238 fdc->sc_errors = 0; 1239 } else { 1240 if (--fdc->sc_overruns < -20) { 1241 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1242 if (thr > 0) { 1243 thr--; 1244 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1245 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1246 #ifdef FD_DEBUG 1247 if (fdc_debug) 1248 printf("fdc: %d -> threshold\n", thr); 1249 #endif 1250 fdconf(fdc); 1251 } 1252 fdc->sc_overruns = 0; 1253 } 1254 } 1255 fd->sc_blkno += fd->sc_nblks; 1256 fd->sc_skip += fd->sc_nbytes; 1257 fd->sc_bcount -= fd->sc_nbytes; 1258 if (fd->sc_bcount > 0) { 1259 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1260 goto doseek; 1261 } 1262 fdfinish(fd, bp); 1263 goto loop; 1264 1265 case DORESET: 1266 doreset: 1267 /* try a reset, keep motor on */ 1268 fd_set_motor(fdc); 1269 delay(100); 1270 fdc_reset(fdc); 1271 fdc->sc_nstat = 0; 1272 fdc->sc_istate = ISTATE_SENSEI; 1273 fdc->sc_state = RESETCOMPLETE; 1274 timeout(fdctimeout, fdc, hz / 2); 1275 return 1; /* will return later */ 1276 1277 case RESETCOMPLETE: 1278 untimeout(fdctimeout, fdc); 1279 fdconf(fdc); 1280 1281 /* fall through */ 1282 case DORECAL: 1283 fdc->sc_state = RECALWAIT; 1284 fdc->sc_istate = ISTATE_SENSEI; 1285 fdc->sc_nstat = 0; 1286 /* recalibrate function */ 1287 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1288 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1289 timeout(fdctimeout, fdc, 5 * hz); 1290 return 1; /* will return later */ 1291 1292 case RECALWAIT: 1293 untimeout(fdctimeout, fdc); 1294 fdc->sc_state = RECALCOMPLETE; 1295 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1296 /* allow 1/30 second for heads to settle */ 1297 timeout(fdcpseudointr, fdc, hz / 30); 1298 return 1; /* will return later */ 1299 } 1300 1301 case RECALCOMPLETE: 1302 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1303 #ifdef FD_DEBUG 1304 if (fdc_debug) 1305 fdcstatus(&fd->sc_dk.dk_dev, 2, "recalibrate failed"); 1306 #endif 1307 fdcretry(fdc); 1308 goto loop; 1309 } 1310 fd->sc_cylin = 0; 1311 goto doseek; 1312 1313 case MOTORWAIT: 1314 if (fd->sc_flags & FD_MOTOR_WAIT) 1315 return 1; /* time's not up yet */ 1316 goto doseek; 1317 1318 default: 1319 fdcstatus(&fd->sc_dk.dk_dev, 0, "stray interrupt"); 1320 return 1; 1321 } 1322 #ifdef DIAGNOSTIC 1323 panic("fdcintr: impossible"); 1324 #endif 1325 #undef st0 1326 #undef st1 1327 #undef cyl 1328 } 1329 1330 void 1331 fdcretry(fdc) 1332 struct fdc_softc *fdc; 1333 { 1334 struct fd_softc *fd; 1335 struct buf *bp; 1336 1337 fd = fdc->sc_drives.tqh_first; 1338 bp = fd->sc_q.b_actf; 1339 1340 fdc->sc_overruns = 0; 1341 1342 switch (fdc->sc_errors) { 1343 case 0: 1344 /* try again */ 1345 fdc->sc_state = 1346 (fdc->sc_flags & FDC_EIS) ? DOIO : SEEKCOMPLETE; 1347 break; 1348 1349 case 1: case 2: case 3: 1350 /* didn't work; try recalibrating */ 1351 fdc->sc_state = DORECAL; 1352 break; 1353 1354 case 4: 1355 /* still no go; reset the bastard */ 1356 fdc->sc_state = DORESET; 1357 break; 1358 1359 default: 1360 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1361 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1362 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 1363 fdc->sc_status[0], NE7_ST0BITS, 1364 fdc->sc_status[1], NE7_ST1BITS, 1365 fdc->sc_status[2], NE7_ST2BITS, 1366 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1367 1368 bp->b_flags |= B_ERROR; 1369 bp->b_error = EIO; 1370 fdfinish(fd, bp); 1371 } 1372 fdc->sc_errors++; 1373 } 1374 1375 int 1376 fdsize(dev) 1377 dev_t dev; 1378 { 1379 1380 /* Swapping to floppies would not make sense. */ 1381 return -1; 1382 } 1383 1384 int 1385 fddump() 1386 { 1387 1388 /* Not implemented. */ 1389 return EINVAL; 1390 } 1391 1392 int 1393 fdioctl(dev, cmd, addr, flag) 1394 dev_t dev; 1395 u_long cmd; 1396 caddr_t addr; 1397 int flag; 1398 { 1399 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 1400 struct disklabel buffer; 1401 int error; 1402 1403 switch (cmd) { 1404 case DIOCGDINFO: 1405 bzero(&fd->sc_dk.dk_label, sizeof(struct disklabel)); 1406 1407 fd->sc_dk.dk_label.d_secpercyl = fd->sc_type->seccyl; 1408 fd->sc_dk.dk_label.d_type = DTYPE_FLOPPY; 1409 fd->sc_dk.dk_label.d_secsize = FDC_BSIZE; 1410 1411 if (readdisklabel(dev, fdstrategy, 1412 &fd->sc_dk.dk_label, 1413 &fd->sc_dk.dk_cpulabel) != NULL) 1414 return EINVAL; 1415 1416 *(struct disklabel *)addr = fd->sc_dk.dk_label; 1417 return 0; 1418 1419 case DIOCWLABEL: 1420 if ((flag & FWRITE) == 0) 1421 return EBADF; 1422 /* XXX do something */ 1423 return 0; 1424 1425 case DIOCWDINFO: 1426 if ((flag & FWRITE) == 0) 1427 return EBADF; 1428 1429 error = setdisklabel(&fd->sc_dk.dk_label, 1430 (struct disklabel *)addr, 0, 1431 &fd->sc_dk.dk_cpulabel); 1432 if (error) 1433 return error; 1434 1435 error = writedisklabel(dev, fdstrategy, 1436 &fd->sc_dk.dk_label, 1437 &fd->sc_dk.dk_cpulabel); 1438 return error; 1439 1440 case DIOCEJECT: 1441 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1442 delay(10); 1443 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1444 return 0; 1445 #ifdef DEBUG 1446 case _IO('f', 100): 1447 { 1448 int i; 1449 struct fdc_softc *fdc = (struct fdc_softc *) 1450 fd->sc_dk.dk_dev.dv_parent; 1451 1452 out_fdc(fdc, NE7CMD_DUMPREG); 1453 fdcresult(fdc); 1454 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1455 for (i = 0; i < fdc->sc_nstat; i++) 1456 printf(" %x", fdc->sc_status[i]); 1457 printf(">\n"); 1458 } 1459 1460 return 0; 1461 case _IOW('f', 101, int): 1462 ((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent)->sc_cfg &= 1463 ~CFG_THRHLD_MASK; 1464 ((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent)->sc_cfg |= 1465 (*(int *)addr & CFG_THRHLD_MASK); 1466 fdconf(fd->sc_dk.dk_dev.dv_parent); 1467 return 0; 1468 case _IO('f', 102): 1469 { 1470 int i; 1471 struct fdc_softc *fdc = (struct fdc_softc *) 1472 fd->sc_dk.dk_dev.dv_parent; 1473 out_fdc(fdc, NE7CMD_SENSEI); 1474 fdcresult(fdc); 1475 printf("sensei(%d regs): <", fdc->sc_nstat); 1476 for (i=0; i< fdc->sc_nstat; i++) 1477 printf(" 0x%x", fdc->sc_status[i]); 1478 } 1479 printf(">\n"); 1480 return 0; 1481 #endif 1482 default: 1483 return ENOTTY; 1484 } 1485 1486 #ifdef DIAGNOSTIC 1487 panic("fdioctl: impossible"); 1488 #endif 1489 } 1490
Indexes created Fri Oct 03 02:09:57 GMT 2025