fd.c revision 1.18
1 /* $NetBSD: fd.c,v 1.18 1996/01/12 00:19:47 thorpej 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 device sc_dv; /* generic device info */ 168 struct disk sc_dk; /* generic disk info */ 169 170 struct fd_type *sc_deftype; /* default type descriptor */ 171 struct fd_type *sc_type; /* current type descriptor */ 172 173 daddr_t sc_blkno; /* starting block number */ 174 int sc_bcount; /* byte count left */ 175 int sc_skip; /* bytes already transferred */ 176 int sc_nblks; /* number of blocks currently tranferring */ 177 int sc_nbytes; /* number of bytes currently tranferring */ 178 179 int sc_drive; /* physical unit number */ 180 int sc_flags; 181 #define FD_OPEN 0x01 /* it's open */ 182 #define FD_MOTOR 0x02 /* motor should be on */ 183 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 184 int sc_cylin; /* where we think the head is */ 185 186 TAILQ_ENTRY(fd_softc) sc_drivechain; 187 int sc_ops; /* I/O ops since last switch */ 188 struct buf sc_q; /* head of buf chain */ 189 }; 190 191 /* floppy driver configuration */ 192 int fdmatch __P((struct device *, void *, void *)); 193 void fdattach __P((struct device *, struct device *, void *)); 194 195 struct cfdriver fdcd = { 196 NULL, "fd", fdmatch, fdattach, DV_DISK, sizeof(struct fd_softc) 197 }; 198 199 void fdgetdisklabel __P((struct fd_softc *)); 200 int fd_get_parms __P((struct fd_softc *)); 201 void fdstrategy __P((struct buf *)); 202 void fdstart __P((struct fd_softc *)); 203 204 struct dkdriver fddkdriver = { fdstrategy }; 205 206 struct fd_type *fd_nvtotype __P((char *, int, int)); 207 void fd_set_motor __P((struct fdc_softc *fdc)); 208 void fd_motor_off __P((void *arg)); 209 void fd_motor_on __P((void *arg)); 210 int fdcresult __P((struct fdc_softc *fdc)); 211 int out_fdc __P((struct fdc_softc *fdc, u_char x)); 212 void fdcstart __P((struct fdc_softc *fdc)); 213 void fdcstatus __P((struct device *dv, int n, char *s)); 214 void fdc_reset __P((struct fdc_softc *fdc)); 215 void fdctimeout __P((void *arg)); 216 void fdcpseudointr __P((void *arg)); 217 #ifdef FDC_C_HANDLER 218 int fdchwintr __P((struct fdc_softc *)); 219 #else 220 void fdchwintr __P((void)); 221 #endif 222 int fdcswintr __P((struct fdc_softc *)); 223 void fdcretry __P((struct fdc_softc *fdc)); 224 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 225 226 #if PIL_FDSOFT == 4 227 #define IE_FDSOFT IE_L4 228 #else 229 #error 4 230 #endif 231 232 #define OBP_FDNAME (cputyp == CPU_SUN4M ? "SUNW,fdtwo" : "fd") 233 234 int 235 fdcmatch(parent, match, aux) 236 struct device *parent; 237 void *match, *aux; 238 { 239 struct cfdata *cf = match; 240 register struct confargs *ca = aux; 241 register struct romaux *ra = &ca->ca_ra; 242 243 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 244 if (strcmp(OBP_FDNAME, ra->ra_name)) 245 return (0); 246 if (ca->ca_bustype == BUS_MAIN) { 247 if (ca->ca_ra.ra_vaddr && 248 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 249 return (0); 250 } 251 return (1); 252 } 253 254 return (0); 255 } 256 257 /* 258 * Arguments passed between fdcattach and fdprobe. 259 */ 260 struct fdc_attach_args { 261 int fa_drive; 262 int fa_bootdev; 263 struct fd_type *fa_deftype; 264 }; 265 266 /* 267 * Print the location of a disk drive (called just before attaching the 268 * the drive). If `fdc' is not NULL, the drive was found but was not 269 * in the system config file; print the drive name as well. 270 * Return QUIET (config_find ignores this if the device was configured) to 271 * avoid printing `fdN not configured' messages. 272 */ 273 int 274 fdprint(aux, fdc) 275 void *aux; 276 char *fdc; 277 { 278 register struct fdc_attach_args *fa = aux; 279 280 if (!fdc) 281 printf(" drive %d", fa->fa_drive); 282 return QUIET; 283 } 284 285 static void 286 fdconf(fdc) 287 struct fdc_softc *fdc; 288 { 289 int vroom; 290 291 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 292 return; 293 294 /* 295 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 296 * the PROM thinks is appropriate. 297 */ 298 if ((vroom = fdc->sc_status[7]) == 0) 299 vroom = 0x64; 300 301 /* Configure controller to use FIFO and Implied Seek */ 302 out_fdc(fdc, NE7CMD_CFG); 303 out_fdc(fdc, vroom); 304 out_fdc(fdc, fdc->sc_cfg); 305 out_fdc(fdc, 0); /* PRETRK */ 306 /* No result phase */ 307 } 308 309 void 310 fdcattach(parent, self, aux) 311 struct device *parent, *self; 312 void *aux; 313 { 314 register struct confargs *ca = aux; 315 struct fdc_softc *fdc = (void *)self; 316 struct fdc_attach_args fa; 317 int n, pri; 318 char code; 319 320 if (ca->ca_ra.ra_vaddr) 321 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 322 else 323 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_reg, 0, 324 ca->ca_ra.ra_len, 325 ca->ca_bustype); 326 327 fdc->sc_state = DEVIDLE; 328 fdc->sc_istate = ISTATE_IDLE; 329 fdc->sc_flags |= FDC_EIS; 330 TAILQ_INIT(&fdc->sc_drives); 331 332 pri = ca->ca_ra.ra_intr[0].int_pri; 333 #ifdef FDC_C_HANDLER 334 fdc->sc_hih.ih_fun = (void *)fdchwintr; 335 fdc->sc_hih.ih_arg = fdc; 336 intr_establish(pri, &fdc->sc_hih); 337 #else 338 fdciop = &fdc->sc_io; 339 intr_fasttrap(pri, fdchwintr); 340 #endif 341 fdc->sc_sih.ih_fun = (void *)fdcswintr; 342 fdc->sc_sih.ih_arg = fdc; 343 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 344 345 /* Assume a 82077 */ 346 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 347 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 348 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 349 350 code = '7'; 351 if (*fdc->sc_reg_dor == NE7_RQM) { 352 /* 353 * This hack from Chris Torek: apparently DOR really 354 * addresses MSR/DRS on a 82072. 355 * We used to rely on the VERSION command to tell the 356 * difference (which did not work). 357 */ 358 *fdc->sc_reg_dor = FDC_250KBPS; 359 if (*fdc->sc_reg_dor == NE7_RQM) 360 code = '2'; 361 } 362 if (code == '7') { 363 fdc->sc_flags |= FDC_82077; 364 } else { 365 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 366 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 367 fdc->sc_reg_dor = 0; 368 } 369 370 #ifdef FD_DEBUG 371 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 372 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 373 if (fdc_debug) 374 printf("[version cmd]"); 375 } 376 #endif 377 378 /* 379 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 380 * Note: CFG_EFIFO is active-low, initial threshold value: 8 381 */ 382 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 383 fdconf(fdc); 384 385 if (fdc->sc_flags & FDC_82077) { 386 /* Lock configuration across soft resets. */ 387 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 388 if (fdcresult(fdc) != 1) 389 printf(" CFGLOCK: unexpected response"); 390 } 391 392 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 393 394 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 395 396 /* 397 * Controller and drives are represented by one and the same 398 * Openprom node, so we can as well check for the floppy boots here. 399 */ 400 if (ca->ca_ra.ra_bp && 401 strcmp(ca->ca_ra.ra_bp->name, OBP_FDNAME) == 0 && 402 ca->ca_ra.ra_bp->val[0] == 0 && 403 ca->ca_ra.ra_bp->val[1] == 0) 404 fa.fa_bootdev = 1; 405 else 406 fa.fa_bootdev = 0; 407 408 /* physical limit: four drives per controller. */ 409 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 410 fa.fa_deftype = NULL; /* unknown */ 411 fa.fa_deftype = &fd_types[0]; /* XXX */ 412 (void)config_found(self, (void *)&fa, fdprint); 413 } 414 415 bootpath_store(1, NULL); 416 } 417 418 int 419 fdmatch(parent, match, aux) 420 struct device *parent; 421 void *match, *aux; 422 { 423 struct fdc_softc *fdc = (void *)parent; 424 struct cfdata *cf = match; 425 struct fdc_attach_args *fa = aux; 426 int drive = fa->fa_drive; 427 int n; 428 429 if (drive > 0) 430 /* XXX - for now, punt > 1 drives */ 431 return 0; 432 433 if (fdc->sc_flags & FDC_82077) { 434 /* select drive and turn on motor */ 435 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 436 /* wait for motor to spin up */ 437 delay(250000); 438 } else { 439 auxregbisc(AUXIO_FDS, 0); 440 } 441 fdc->sc_nstat = 0; 442 out_fdc(fdc, NE7CMD_RECAL); 443 out_fdc(fdc, drive); 444 /* wait for recalibrate */ 445 for (n = 0; n < 100000; n++) { 446 delay(10); 447 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 448 /* wait a bit longer till device *really* is ready */ 449 delay(100000); 450 if (out_fdc(fdc, NE7CMD_SENSEI)) 451 break; 452 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 453 /* 454 * Got `invalid command'; we interpret it 455 * to mean that the re-calibrate hasn't in 456 * fact finished yet 457 */ 458 continue; 459 break; 460 } 461 } 462 n = fdc->sc_nstat; 463 #ifdef FD_DEBUG 464 if (fdc_debug) { 465 int i; 466 printf("fdprobe: %d stati:", n); 467 for (i = 0; i < n; i++) 468 printf(" %x", fdc->sc_status[i]); 469 printf("\n"); 470 } 471 #endif 472 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 473 return 0; 474 /* turn off motor */ 475 if (fdc->sc_flags & FDC_82077) { 476 /* select drive and turn on motor */ 477 *fdc->sc_reg_dor = FDO_FRST; 478 } else { 479 auxregbisc(0, AUXIO_FDS); 480 } 481 482 return 1; 483 } 484 485 /* 486 * Controller is working, and drive responded. Attach it. 487 */ 488 void 489 fdattach(parent, self, aux) 490 struct device *parent, *self; 491 void *aux; 492 { 493 struct fdc_softc *fdc = (void *)parent; 494 struct fd_softc *fd = (void *)self; 495 struct fdc_attach_args *fa = aux; 496 struct fd_type *type = fa->fa_deftype; 497 int drive = fa->fa_drive; 498 499 /* XXX Allow `flags' to override device type? */ 500 501 if (type) 502 printf(": %s %d cyl, %d head, %d sec\n", type->name, 503 type->tracks, type->heads, type->sectrac); 504 else 505 printf(": density unknown\n"); 506 507 fd->sc_cylin = -1; 508 fd->sc_drive = drive; 509 fd->sc_deftype = type; 510 fdc->sc_fd[drive] = fd; 511 512 /* 513 * Initialize and attach the disk structure. 514 */ 515 fd->sc_dk.dk_name = fd->sc_dv.dv_xname; 516 fd->sc_dk.dk_driver = &fddkdriver; 517 disk_attach(&fd->sc_dk); 518 519 /* 520 * We're told if we're the boot device in fdcattach(). 521 */ 522 if (fa->fa_bootdev) 523 bootdv = &fd->sc_dv; 524 525 /* XXX Need to do some more fiddling with sc_dk. */ 526 dk_establish(&fd->sc_dk, &fd->sc_dv); 527 } 528 529 inline struct fd_type * 530 fd_dev_to_type(fd, dev) 531 struct fd_softc *fd; 532 dev_t dev; 533 { 534 int type = FDTYPE(dev); 535 536 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 537 return NULL; 538 return type ? &fd_types[type - 1] : fd->sc_deftype; 539 } 540 541 void 542 fdstrategy(bp) 543 register struct buf *bp; /* IO operation to perform */ 544 { 545 struct fd_softc *fd; 546 int unit = FDUNIT(bp->b_dev); 547 int sz; 548 int s; 549 550 /* Valid unit, controller, and request? */ 551 if (unit >= fdcd.cd_ndevs || 552 (fd = fdcd.cd_devs[unit]) == 0 || 553 bp->b_blkno < 0 || 554 (bp->b_bcount % FDC_BSIZE) != 0) { 555 bp->b_error = EINVAL; 556 goto bad; 557 } 558 559 /* If it's a null transfer, return immediately. */ 560 if (bp->b_bcount == 0) 561 goto done; 562 563 sz = howmany(bp->b_bcount, FDC_BSIZE); 564 565 if (bp->b_blkno + sz > fd->sc_type->size) { 566 sz = fd->sc_type->size - bp->b_blkno; 567 if (sz == 0) { 568 /* If exactly at end of disk, return EOF. */ 569 bp->b_resid = bp->b_bcount; 570 goto done; 571 } 572 if (sz < 0) { 573 /* If past end of disk, return EINVAL. */ 574 bp->b_error = EINVAL; 575 goto bad; 576 } 577 /* Otherwise, truncate request. */ 578 bp->b_bcount = sz << DEV_BSHIFT; 579 } 580 581 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 582 583 #ifdef FD_DEBUG 584 if (fdc_debug > 1) 585 printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d\n", 586 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 587 #endif 588 589 /* Queue transfer on drive, activate drive and controller if idle. */ 590 s = splbio(); 591 disksort(&fd->sc_q, bp); 592 untimeout(fd_motor_off, fd); /* a good idea */ 593 if (!fd->sc_q.b_active) 594 fdstart(fd); 595 #ifdef DIAGNOSTIC 596 else { 597 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 598 if (fdc->sc_state == DEVIDLE) { 599 printf("fdstrategy: controller inactive\n"); 600 fdcstart(fdc); 601 } 602 } 603 #endif 604 splx(s); 605 return; 606 607 bad: 608 bp->b_flags |= B_ERROR; 609 done: 610 /* Toss transfer; we're done early. */ 611 biodone(bp); 612 } 613 614 void 615 fdstart(fd) 616 struct fd_softc *fd; 617 { 618 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 619 int active = fdc->sc_drives.tqh_first != 0; 620 621 /* Link into controller queue. */ 622 fd->sc_q.b_active = 1; 623 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 624 625 /* If controller not already active, start it. */ 626 if (!active) 627 fdcstart(fdc); 628 } 629 630 void 631 fdfinish(fd, bp) 632 struct fd_softc *fd; 633 struct buf *bp; 634 { 635 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 636 637 /* 638 * Move this drive to the end of the queue to give others a `fair' 639 * chance. We only force a switch if N operations are completed while 640 * another drive is waiting to be serviced, since there is a long motor 641 * startup delay whenever we switch. 642 */ 643 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 644 fd->sc_ops = 0; 645 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 646 if (bp->b_actf) { 647 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 648 } else 649 fd->sc_q.b_active = 0; 650 } 651 bp->b_resid = fd->sc_bcount; 652 fd->sc_skip = 0; 653 fd->sc_q.b_actf = bp->b_actf; 654 655 biodone(bp); 656 /* turn off motor 5s from now */ 657 timeout(fd_motor_off, fd, 5 * hz); 658 fdc->sc_state = DEVIDLE; 659 } 660 661 void 662 fdc_reset(fdc) 663 struct fdc_softc *fdc; 664 { 665 if (fdc->sc_flags & FDC_82077) { 666 *fdc->sc_reg_dor = FDO_MOEN(0); 667 } 668 669 *fdc->sc_reg_drs = DRS_RESET; 670 delay(10); 671 *fdc->sc_reg_drs = 0; 672 #ifdef FD_DEBUG 673 if (fdc_debug) 674 printf("fdc reset\n"); 675 #endif 676 } 677 678 void 679 fd_set_motor(fdc) 680 struct fdc_softc *fdc; 681 { 682 struct fd_softc *fd; 683 u_char status; 684 int n; 685 686 if (fdc->sc_flags & FDC_82077) { 687 status = FDO_FRST | FDO_FDMAEN; 688 if (fd = fdc->sc_drives.tqh_first) 689 status |= fd->sc_drive; 690 691 for (n = 0; n < 4; n++) 692 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 693 status |= FDO_MOEN(n); 694 *fdc->sc_reg_dor = status; 695 } else { 696 int on = 0; 697 698 for (n = 0; n < 4; n++) 699 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 700 on = 1; 701 if (on) { 702 auxregbisc(AUXIO_FDS, 0); 703 } else { 704 auxregbisc(0, AUXIO_FDS); 705 } 706 } 707 } 708 709 void 710 fd_motor_off(arg) 711 void *arg; 712 { 713 struct fd_softc *fd = arg; 714 int s; 715 716 s = splbio(); 717 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 718 fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent); 719 splx(s); 720 } 721 722 void 723 fd_motor_on(arg) 724 void *arg; 725 { 726 struct fd_softc *fd = arg; 727 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 728 int s; 729 730 s = splbio(); 731 fd->sc_flags &= ~FD_MOTOR_WAIT; 732 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 733 (void) fdcswintr(fdc); 734 splx(s); 735 } 736 737 int 738 fdcresult(fdc) 739 struct fdc_softc *fdc; 740 { 741 u_char i; 742 int j = 100000, 743 n = 0; 744 745 for (; j; j--) { 746 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 747 if (i == NE7_RQM) 748 return (fdc->sc_nstat = n); 749 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 750 if (n >= sizeof(fdc->sc_status)) { 751 log(LOG_ERR, "fdcresult: overrun\n"); 752 return -1; 753 } 754 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 755 } 756 } 757 log(LOG_ERR, "fdcresult: timeout\n"); 758 return (fdc->sc_nstat = -1); 759 } 760 761 int 762 out_fdc(fdc, x) 763 struct fdc_softc *fdc; 764 u_char x; 765 { 766 int i = 100000; 767 768 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 769 if (i <= 0) 770 return -1; 771 772 *fdc->sc_reg_fifo = x; 773 return 0; 774 } 775 776 int 777 Fdopen(dev, flags) 778 dev_t dev; 779 int flags; 780 { 781 int unit; 782 struct fd_softc *fd; 783 struct fd_type *type; 784 785 unit = FDUNIT(dev); 786 if (unit >= fdcd.cd_ndevs) 787 return ENXIO; 788 fd = fdcd.cd_devs[unit]; 789 if (fd == 0) 790 return ENXIO; 791 type = fd_dev_to_type(fd, dev); 792 if (type == NULL) 793 return ENXIO; 794 795 if ((fd->sc_flags & FD_OPEN) != 0 && 796 fd->sc_type != type) 797 return EBUSY; 798 799 fd->sc_type = type; 800 fd->sc_cylin = -1; 801 fd->sc_flags |= FD_OPEN; 802 803 return 0; 804 } 805 806 int 807 fdclose(dev, flags) 808 dev_t dev; 809 int flags; 810 { 811 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 812 813 fd->sc_flags &= ~FD_OPEN; 814 return 0; 815 } 816 817 int 818 fdread(dev, uio) 819 dev_t dev; 820 struct uio *uio; 821 { 822 823 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 824 } 825 826 int 827 fdwrite(dev, uio) 828 dev_t dev; 829 struct uio *uio; 830 { 831 832 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 833 } 834 835 void 836 fdcstart(fdc) 837 struct fdc_softc *fdc; 838 { 839 840 #ifdef DIAGNOSTIC 841 /* only got here if controller's drive queue was inactive; should 842 be in idle state */ 843 if (fdc->sc_state != DEVIDLE) { 844 printf("fdcstart: not idle\n"); 845 return; 846 } 847 #endif 848 (void) fdcswintr(fdc); 849 } 850 851 void 852 fdcstatus(dv, n, s) 853 struct device *dv; 854 int n; 855 char *s; 856 { 857 struct fdc_softc *fdc = (void *)dv->dv_parent; 858 859 #if 0 860 /* 861 * A 82072 seems to return <invalid command> on 862 * gratuitous Sense Interrupt commands. 863 */ 864 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 865 out_fdc(fdc, NE7CMD_SENSEI); 866 (void) fdcresult(fdc); 867 n = 2; 868 } 869 #endif 870 871 /* Just print last status */ 872 n = fdc->sc_nstat; 873 874 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 875 876 switch (n) { 877 case 0: 878 printf("\n"); 879 break; 880 case 2: 881 printf(" (st0 %b cyl %d)\n", 882 fdc->sc_status[0], NE7_ST0BITS, 883 fdc->sc_status[1]); 884 break; 885 case 7: 886 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 887 fdc->sc_status[0], NE7_ST0BITS, 888 fdc->sc_status[1], NE7_ST1BITS, 889 fdc->sc_status[2], NE7_ST2BITS, 890 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 891 break; 892 #ifdef DIAGNOSTIC 893 default: 894 printf(" fdcstatus: weird size: %d\n", n); 895 break; 896 #endif 897 } 898 } 899 900 void 901 fdctimeout(arg) 902 void *arg; 903 { 904 struct fdc_softc *fdc = arg; 905 struct fd_softc *fd = fdc->sc_drives.tqh_first; 906 int s; 907 908 s = splbio(); 909 fdcstatus(&fd->sc_dv, 0, "timeout"); 910 911 if (fd->sc_q.b_actf) 912 fdc->sc_state++; 913 else 914 fdc->sc_state = DEVIDLE; 915 916 (void) fdcswintr(fdc); 917 splx(s); 918 } 919 920 void 921 fdcpseudointr(arg) 922 void *arg; 923 { 924 struct fdc_softc *fdc = arg; 925 int s; 926 927 /* Just ensure it has the right spl. */ 928 s = splbio(); 929 (void) fdcswintr(fdc); 930 splx(s); 931 } 932 933 934 #ifdef FDC_C_HANDLER 935 /* 936 * hardware interrupt entry point: must be converted to `fast' 937 * (in-window) handler. 938 */ 939 int 940 fdchwintr(fdc) 941 struct fdc_softc *fdc; 942 { 943 struct buf *bp; 944 int read; 945 946 switch (fdc->sc_istate) { 947 case ISTATE_SENSEI: 948 out_fdc(fdc, NE7CMD_SENSEI); 949 fdcresult(fdc); 950 fdc->sc_istate = ISTATE_IDLE; 951 ienab_bis(IE_FDSOFT); 952 return 1; 953 case ISTATE_IDLE: 954 case ISTATE_SPURIOUS: 955 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 956 fdcresult(fdc); 957 fdc->sc_istate = ISTATE_SPURIOUS; 958 printf("fdc: stray hard interrupt... "); 959 ienab_bis(IE_FDSOFT); 960 return 1; 961 case ISTATE_DMA: 962 break; 963 default: 964 printf("fdc: goofed ...\n"); 965 return 1; 966 } 967 968 read = bp->b_flags & B_READ; 969 for (;;) { 970 register int msr; 971 972 msr = *fdc->sc_reg_msr; 973 974 if ((msr & NE7_RQM) == 0) 975 break; 976 977 if ((msr & NE7_NDM) == 0) { 978 fdcresult(fdc); 979 fdc->sc_istate = ISTATE_IDLE; 980 ienab_bis(IE_FDSOFT); 981 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 982 break; 983 } 984 985 if (msr & NE7_DIO) { 986 #ifdef DIAGNOSTIC 987 if (!read) 988 printf("fdxfer: false read\n"); 989 #endif 990 *fdc->sc_data++ = *fdc->sc_reg_fifo; 991 } else { 992 #ifdef DIAGNOSTIC 993 if (read) 994 printf("fdxfer: false write\n"); 995 #endif 996 *fdc->sc_reg_fifo = *fdc->sc_data++; 997 } 998 if (--fdc->sc_tc == 0) { 999 auxregbisc(AUXIO_FTC, 0); 1000 fdc->sc_istate = ISTATE_IDLE; 1001 delay(10); 1002 auxregbisc(0, AUXIO_FTC); 1003 fdcresult(fdc); 1004 ienab_bis(IE_FDSOFT); 1005 break; 1006 } 1007 } 1008 return 1; 1009 } 1010 #endif 1011 1012 int 1013 fdcswintr(fdc) 1014 struct fdc_softc *fdc; 1015 { 1016 #define st0 fdc->sc_status[0] 1017 #define st1 fdc->sc_status[1] 1018 #define cyl fdc->sc_status[1] 1019 #define OUT_FDC(fdc, c, s) \ 1020 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1021 1022 struct fd_softc *fd; 1023 struct buf *bp; 1024 int read, head, trac, sec, i, s, nblks; 1025 struct fd_type *type; 1026 1027 1028 if (fdc->sc_istate != ISTATE_IDLE) { 1029 /* Trouble... */ 1030 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1031 fdc->sc_state, fdc->sc_istate); 1032 fdc->sc_istate = ISTATE_IDLE; 1033 if (fdc->sc_state == RESETCOMPLETE || 1034 fdc->sc_state == RESETTIMEDOUT) { 1035 panic("fdcintr: spurious interrupt can't be cleared"); 1036 } 1037 goto doreset; 1038 } 1039 1040 loop: 1041 /* Is there a drive for the controller to do a transfer with? */ 1042 fd = fdc->sc_drives.tqh_first; 1043 if (fd == NULL) { 1044 fdc->sc_state = DEVIDLE; 1045 return 0; 1046 } 1047 1048 /* Is there a transfer to this drive? If not, deactivate drive. */ 1049 bp = fd->sc_q.b_actf; 1050 if (bp == NULL) { 1051 fd->sc_ops = 0; 1052 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1053 fd->sc_q.b_active = 0; 1054 goto loop; 1055 } 1056 1057 switch (fdc->sc_state) { 1058 case DEVIDLE: 1059 fdc->sc_errors = 0; 1060 fd->sc_skip = 0; 1061 fd->sc_bcount = bp->b_bcount; 1062 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1063 untimeout(fd_motor_off, fd); 1064 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1065 fdc->sc_state = MOTORWAIT; 1066 return 1; 1067 } 1068 if ((fd->sc_flags & FD_MOTOR) == 0) { 1069 /* Turn on the motor, being careful about pairing. */ 1070 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1071 if (ofd && ofd->sc_flags & FD_MOTOR) { 1072 untimeout(fd_motor_off, ofd); 1073 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1074 } 1075 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1076 fd_set_motor(fdc); 1077 fdc->sc_state = MOTORWAIT; 1078 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1079 /* Allow .25s for motor to stabilize. */ 1080 timeout(fd_motor_on, fd, hz / 4); 1081 } else { 1082 fd->sc_flags &= ~FD_MOTOR_WAIT; 1083 goto loop; 1084 } 1085 return 1; 1086 } 1087 /* Make sure the right drive is selected. */ 1088 fd_set_motor(fdc); 1089 1090 /* fall through */ 1091 case DOSEEK: 1092 doseek: 1093 if (fdc->sc_flags & FDC_EIS) { 1094 fd->sc_cylin = bp->b_cylin; 1095 /* We use implied seek */ 1096 goto doio; 1097 } 1098 1099 if (fd->sc_cylin == bp->b_cylin) 1100 goto doio; 1101 1102 /* specify command */ 1103 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1104 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1105 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1106 1107 fdc->sc_istate = ISTATE_SENSEI; 1108 /* seek function */ 1109 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1110 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1111 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1112 1113 fd->sc_cylin = -1; 1114 fdc->sc_state = SEEKWAIT; 1115 fdc->sc_nstat = 0; 1116 1117 fd->sc_dk.dk_seek++; 1118 disk_busy(&fd->sc_dk); 1119 1120 timeout(fdctimeout, fdc, 4 * hz); 1121 return 1; 1122 1123 case DOIO: 1124 doio: 1125 type = fd->sc_type; 1126 sec = fd->sc_blkno % type->seccyl; 1127 nblks = type->seccyl - sec; 1128 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1129 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1130 fd->sc_nblks = nblks; 1131 fd->sc_nbytes = nblks * FDC_BSIZE; 1132 head = sec / type->sectrac; 1133 sec -= head * type->sectrac; 1134 #ifdef DIAGNOSTIC 1135 {int block; 1136 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1137 if (block != fd->sc_blkno) { 1138 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1139 #ifdef DDB 1140 Debugger(); 1141 #endif 1142 }} 1143 #endif 1144 read = bp->b_flags & B_READ; 1145 1146 /* Setup for pseudo DMA */ 1147 fdc->sc_data = bp->b_data + fd->sc_skip; 1148 fdc->sc_tc = fd->sc_nbytes; 1149 1150 *fdc->sc_reg_drs = type->rate; 1151 #ifdef FD_DEBUG 1152 if (fdc_debug > 1) 1153 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1154 read ? "read" : "write", fd->sc_drive, 1155 fd->sc_cylin, head, sec, nblks); 1156 #endif 1157 fdc->sc_state = IOCOMPLETE; 1158 fdc->sc_istate = ISTATE_DMA; 1159 fdc->sc_nstat = 0; 1160 if (read) 1161 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1162 else 1163 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1164 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1165 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1166 OUT_FDC(fdc, head, IOTIMEDOUT); 1167 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1168 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1169 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1170 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1171 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1172 1173 disk_busy(&fd->sc_dk); 1174 1175 /* allow 2 seconds for operation */ 1176 timeout(fdctimeout, fdc, 2 * hz); 1177 return 1; /* will return later */ 1178 1179 case SEEKWAIT: 1180 untimeout(fdctimeout, fdc); 1181 fdc->sc_state = SEEKCOMPLETE; 1182 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1183 /* allow 1/50 second for heads to settle */ 1184 timeout(fdcpseudointr, fdc, hz / 50); 1185 return 1; /* will return later */ 1186 } 1187 1188 case SEEKCOMPLETE: 1189 disk_unbusy(&fd->sc_dk, 0); /* no data on seek */ 1190 1191 /* Make sure seek really happened. */ 1192 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1193 cyl != bp->b_cylin * fd->sc_type->step) { 1194 #ifdef FD_DEBUG 1195 if (fdc_debug) 1196 fdcstatus(&fd->sc_dv, 2, "seek failed"); 1197 #endif 1198 fdcretry(fdc); 1199 goto loop; 1200 } 1201 fd->sc_cylin = bp->b_cylin; 1202 goto doio; 1203 1204 case IOTIMEDOUT: 1205 auxregbisc(AUXIO_FTC, 0); 1206 delay(10); 1207 auxregbisc(0, AUXIO_FTC); 1208 (void)fdcresult(fdc); 1209 case SEEKTIMEDOUT: 1210 case RECALTIMEDOUT: 1211 case RESETTIMEDOUT: 1212 fdcretry(fdc); 1213 goto loop; 1214 1215 case IOCOMPLETE: /* IO DONE, post-analyze */ 1216 untimeout(fdctimeout, fdc); 1217 1218 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid)); 1219 1220 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1221 #ifdef FD_DEBUG 1222 if (fdc_debug) { 1223 fdcstatus(&fd->sc_dv, 7, 1224 bp->b_flags & B_READ 1225 ? "read failed" : "write failed"); 1226 printf("blkno %d nblks %d tc %d\n", 1227 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1228 } 1229 #endif 1230 if (fdc->sc_nstat == 7 && 1231 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1232 1233 /* 1234 * Silently retry overruns if no other 1235 * error bit is set. Adjust threshold. 1236 */ 1237 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1238 if (thr < 15) { 1239 thr++; 1240 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1241 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1242 #ifdef FD_DEBUG 1243 if (fdc_debug) 1244 printf("fdc: %d -> threshold\n", thr); 1245 #endif 1246 fdconf(fdc); 1247 fdc->sc_state = DOIO; 1248 fdc->sc_overruns = 0; 1249 } 1250 if (++fdc->sc_overruns < 3) 1251 goto loop; 1252 } 1253 fdcretry(fdc); 1254 goto loop; 1255 } 1256 if (fdc->sc_errors) { 1257 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1258 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1259 printf("\n"); 1260 fdc->sc_errors = 0; 1261 } else { 1262 if (--fdc->sc_overruns < -20) { 1263 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1264 if (thr > 0) { 1265 thr--; 1266 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1267 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1268 #ifdef FD_DEBUG 1269 if (fdc_debug) 1270 printf("fdc: %d -> threshold\n", thr); 1271 #endif 1272 fdconf(fdc); 1273 } 1274 fdc->sc_overruns = 0; 1275 } 1276 } 1277 fd->sc_blkno += fd->sc_nblks; 1278 fd->sc_skip += fd->sc_nbytes; 1279 fd->sc_bcount -= fd->sc_nbytes; 1280 if (fd->sc_bcount > 0) { 1281 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1282 goto doseek; 1283 } 1284 fdfinish(fd, bp); 1285 goto loop; 1286 1287 case DORESET: 1288 doreset: 1289 /* try a reset, keep motor on */ 1290 fd_set_motor(fdc); 1291 delay(100); 1292 fdc_reset(fdc); 1293 fdc->sc_nstat = 0; 1294 fdc->sc_istate = ISTATE_SENSEI; 1295 fdc->sc_state = RESETCOMPLETE; 1296 timeout(fdctimeout, fdc, hz / 2); 1297 return 1; /* will return later */ 1298 1299 case RESETCOMPLETE: 1300 untimeout(fdctimeout, fdc); 1301 fdconf(fdc); 1302 1303 /* fall through */ 1304 case DORECAL: 1305 fdc->sc_state = RECALWAIT; 1306 fdc->sc_istate = ISTATE_SENSEI; 1307 fdc->sc_nstat = 0; 1308 /* recalibrate function */ 1309 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1310 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1311 timeout(fdctimeout, fdc, 5 * hz); 1312 return 1; /* will return later */ 1313 1314 case RECALWAIT: 1315 untimeout(fdctimeout, fdc); 1316 fdc->sc_state = RECALCOMPLETE; 1317 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1318 /* allow 1/30 second for heads to settle */ 1319 timeout(fdcpseudointr, fdc, hz / 30); 1320 return 1; /* will return later */ 1321 } 1322 1323 case RECALCOMPLETE: 1324 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1325 #ifdef FD_DEBUG 1326 if (fdc_debug) 1327 fdcstatus(&fd->sc_dv, 2, "recalibrate failed"); 1328 #endif 1329 fdcretry(fdc); 1330 goto loop; 1331 } 1332 fd->sc_cylin = 0; 1333 goto doseek; 1334 1335 case MOTORWAIT: 1336 if (fd->sc_flags & FD_MOTOR_WAIT) 1337 return 1; /* time's not up yet */ 1338 goto doseek; 1339 1340 default: 1341 fdcstatus(&fd->sc_dv, 0, "stray interrupt"); 1342 return 1; 1343 } 1344 #ifdef DIAGNOSTIC 1345 panic("fdcintr: impossible"); 1346 #endif 1347 #undef st0 1348 #undef st1 1349 #undef cyl 1350 } 1351 1352 void 1353 fdcretry(fdc) 1354 struct fdc_softc *fdc; 1355 { 1356 struct fd_softc *fd; 1357 struct buf *bp; 1358 1359 fd = fdc->sc_drives.tqh_first; 1360 bp = fd->sc_q.b_actf; 1361 1362 fdc->sc_overruns = 0; 1363 1364 switch (fdc->sc_errors) { 1365 case 0: 1366 /* try again */ 1367 fdc->sc_state = 1368 (fdc->sc_flags & FDC_EIS) ? DOIO : SEEKCOMPLETE; 1369 break; 1370 1371 case 1: case 2: case 3: 1372 /* didn't work; try recalibrating */ 1373 fdc->sc_state = DORECAL; 1374 break; 1375 1376 case 4: 1377 /* still no go; reset the bastard */ 1378 fdc->sc_state = DORESET; 1379 break; 1380 1381 default: 1382 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1383 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1384 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 1385 fdc->sc_status[0], NE7_ST0BITS, 1386 fdc->sc_status[1], NE7_ST1BITS, 1387 fdc->sc_status[2], NE7_ST2BITS, 1388 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1389 1390 bp->b_flags |= B_ERROR; 1391 bp->b_error = EIO; 1392 fdfinish(fd, bp); 1393 } 1394 fdc->sc_errors++; 1395 } 1396 1397 int 1398 fdsize(dev) 1399 dev_t dev; 1400 { 1401 1402 /* Swapping to floppies would not make sense. */ 1403 return -1; 1404 } 1405 1406 int 1407 fddump() 1408 { 1409 1410 /* Not implemented. */ 1411 return EINVAL; 1412 } 1413 1414 int 1415 fdioctl(dev, cmd, addr, flag) 1416 dev_t dev; 1417 u_long cmd; 1418 caddr_t addr; 1419 int flag; 1420 { 1421 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 1422 struct disklabel buffer; 1423 int error; 1424 1425 switch (cmd) { 1426 case DIOCGDINFO: 1427 bzero(fd->sc_dk.dk_label, sizeof(struct disklabel)); 1428 1429 fd->sc_dk.dk_label->d_secpercyl = fd->sc_type->seccyl; 1430 fd->sc_dk.dk_label->d_type = DTYPE_FLOPPY; 1431 fd->sc_dk.dk_label->d_secsize = FDC_BSIZE; 1432 1433 if (readdisklabel(dev, fdstrategy, 1434 fd->sc_dk.dk_label, 1435 fd->sc_dk.dk_cpulabel) != NULL) 1436 return EINVAL; 1437 1438 *(struct disklabel *)addr = *(fd->sc_dk.dk_label); 1439 return 0; 1440 1441 case DIOCWLABEL: 1442 if ((flag & FWRITE) == 0) 1443 return EBADF; 1444 /* XXX do something */ 1445 return 0; 1446 1447 case DIOCWDINFO: 1448 if ((flag & FWRITE) == 0) 1449 return EBADF; 1450 1451 error = setdisklabel(fd->sc_dk.dk_label, 1452 (struct disklabel *)addr, 0, 1453 fd->sc_dk.dk_cpulabel); 1454 if (error) 1455 return error; 1456 1457 error = writedisklabel(dev, fdstrategy, 1458 fd->sc_dk.dk_label, 1459 fd->sc_dk.dk_cpulabel); 1460 return error; 1461 1462 case DIOCEJECT: 1463 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1464 delay(10); 1465 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1466 return 0; 1467 1468 #ifdef DEBUG 1469 case _IO('f', 100): 1470 { 1471 int i; 1472 struct fdc_softc *fdc = (struct fdc_softc *) 1473 fd->sc_dv.dv_parent; 1474 1475 out_fdc(fdc, NE7CMD_DUMPREG); 1476 fdcresult(fdc); 1477 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1478 for (i = 0; i < fdc->sc_nstat; i++) 1479 printf(" %x", fdc->sc_status[i]); 1480 printf(">\n"); 1481 } 1482 1483 return 0; 1484 case _IOW('f', 101, int): 1485 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg &= 1486 ~CFG_THRHLD_MASK; 1487 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |= 1488 (*(int *)addr & CFG_THRHLD_MASK); 1489 fdconf(fd->sc_dv.dv_parent); 1490 return 0; 1491 case _IO('f', 102): 1492 { 1493 int i; 1494 struct fdc_softc *fdc = (struct fdc_softc *) 1495 fd->sc_dv.dv_parent; 1496 out_fdc(fdc, NE7CMD_SENSEI); 1497 fdcresult(fdc); 1498 printf("sensei(%d regs): <", fdc->sc_nstat); 1499 for (i=0; i< fdc->sc_nstat; i++) 1500 printf(" 0x%x", fdc->sc_status[i]); 1501 } 1502 printf(">\n"); 1503 return 0; 1504 #endif 1505 default: 1506 return ENOTTY; 1507 } 1508 1509 #ifdef DIAGNOSTIC 1510 panic("fdioctl: impossible"); 1511 #endif 1512 } 1513
Indexes created Fri Oct 03 02:09:57 GMT 2025