fd.c revision 1.10
1 /* $NetBSD: fd.c,v 1.10 1995/08/18 10:30:16 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 #define OBP_FDNAME (cputyp == CPU_SUN4M ? "SUNW,fdtwo" : "fd") 231 232 int 233 fdcmatch(parent, match, aux) 234 struct device *parent; 235 void *match, *aux; 236 { 237 struct cfdata *cf = match; 238 register struct confargs *ca = aux; 239 register struct romaux *ra = &ca->ca_ra; 240 241 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 242 if (strcmp(OBP_FDNAME, ra->ra_name)) 243 return (0); 244 if (ca->ca_bustype == BUS_MAIN) { 245 if (ca->ca_ra.ra_vaddr && 246 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 247 return (0); 248 } 249 return (1); 250 } 251 252 return (0); 253 } 254 255 /* 256 * Arguments passed between fdcattach and fdprobe. 257 */ 258 struct fdc_attach_args { 259 int fa_drive; 260 struct fd_type *fa_deftype; 261 }; 262 263 /* 264 * Print the location of a disk drive (called just before attaching the 265 * the drive). If `fdc' is not NULL, the drive was found but was not 266 * in the system config file; print the drive name as well. 267 * Return QUIET (config_find ignores this if the device was configured) to 268 * avoid printing `fdN not configured' messages. 269 */ 270 int 271 fdprint(aux, fdc) 272 void *aux; 273 char *fdc; 274 { 275 register struct fdc_attach_args *fa = aux; 276 277 if (!fdc) 278 printf(" drive %d", fa->fa_drive); 279 return QUIET; 280 } 281 282 static void 283 fdconf(fdc) 284 struct fdc_softc *fdc; 285 { 286 int vroom; 287 288 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 289 return; 290 291 /* 292 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 293 * the PROM thinks is appropriate. 294 */ 295 if ((vroom = fdc->sc_status[7]) == 0) 296 vroom = 0x64; 297 298 /* Configure controller to use FIFO and Implied Seek */ 299 out_fdc(fdc, NE7CMD_CFG); 300 out_fdc(fdc, vroom); 301 out_fdc(fdc, fdc->sc_cfg); 302 out_fdc(fdc, 0); /* PRETRK */ 303 /* No result phase */ 304 } 305 306 void 307 fdcattach(parent, self, aux) 308 struct device *parent, *self; 309 void *aux; 310 { 311 register struct confargs *ca = aux; 312 struct fdc_softc *fdc = (void *)self; 313 struct fdc_attach_args fa; 314 int n, pri; 315 char code; 316 317 if (ca->ca_ra.ra_vaddr) 318 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 319 else 320 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_paddr, 321 ca->ca_ra.ra_len, 322 ca->ca_bustype); 323 324 fdc->sc_state = DEVIDLE; 325 fdc->sc_istate = ISTATE_IDLE; 326 fdc->sc_flags |= FDC_EIS; 327 TAILQ_INIT(&fdc->sc_drives); 328 329 pri = ca->ca_ra.ra_intr[0].int_pri; 330 #ifdef FDC_C_HANDLER 331 fdc->sc_hih.ih_fun = (void *)fdchwintr; 332 fdc->sc_hih.ih_arg = fdc; 333 intr_establish(pri, &fdc->sc_hih); 334 #else 335 fdciop = &fdc->sc_io; 336 intr_fasttrap(pri, fdchwintr); 337 #endif 338 fdc->sc_sih.ih_fun = (void *)fdcswintr; 339 fdc->sc_sih.ih_arg = fdc; 340 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 341 342 /* Assume a 82077 */ 343 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 344 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 345 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 346 347 code = '7'; 348 if (*fdc->sc_reg_dor == NE7_RQM) { 349 /* 350 * This hack from Chris Torek: apparently DOR really 351 * addresses MSR/DRS on a 82072. 352 * We used to rely on the VERSION command to tell the 353 * difference (which did not work). 354 */ 355 *fdc->sc_reg_dor = FDC_250KBPS; 356 if (*fdc->sc_reg_dor == NE7_RQM) 357 code = '2'; 358 } 359 if (code == '7') { 360 fdc->sc_flags |= FDC_82077; 361 } else { 362 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 363 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 364 fdc->sc_reg_dor = 0; 365 } 366 367 #ifdef FD_DEBUG 368 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 369 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 370 if (fdc_debug) 371 printf("[version cmd]"); 372 } 373 #endif 374 375 /* 376 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 377 * Note: CFG_EFIFO is active-low, initial threshold value: 8 378 */ 379 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 380 fdconf(fdc); 381 382 if (fdc->sc_flags & FDC_82077) { 383 /* Lock configuration across soft resets. */ 384 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 385 if (fdcresult(fdc) != 1) 386 printf(" CFGLOCK: unexpected response"); 387 } 388 389 evcnt_attach(&fdc->sc_dk.dk_dev, "intr", &fdc->sc_intrcnt); 390 391 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 392 393 /* 394 * Controller and drives are represented by one and the same 395 * Openprom node, so we can as well check for the floppy boots here. 396 */ 397 if (ca->ca_ra.ra_bp && 398 strcmp(ca->ca_ra.ra_bp->name, OBP_FDNAME) == 0 && 399 ca->ca_ra.ra_bp->val[0] == 0 && 400 ca->ca_ra.ra_bp->val[1] == 0) 401 bootdv = &fdc->sc_dk.dk_dev; 402 403 /* physical limit: four drives per controller. */ 404 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 405 fa.fa_deftype = NULL; /* unknown */ 406 fa.fa_deftype = &fd_types[0]; /* XXX */ 407 (void)config_found(self, (void *)&fa, fdprint); 408 } 409 } 410 411 int 412 fdmatch(parent, match, aux) 413 struct device *parent; 414 void *match, *aux; 415 { 416 struct fdc_softc *fdc = (void *)parent; 417 struct cfdata *cf = match; 418 struct fdc_attach_args *fa = aux; 419 int drive = fa->fa_drive; 420 int n; 421 422 if (drive > 0) 423 /* XXX - for now, punt > 1 drives */ 424 return 0; 425 426 if (fdc->sc_flags & FDC_82077) { 427 /* select drive and turn on motor */ 428 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 429 /* wait for motor to spin up */ 430 delay(250000); 431 } else { 432 auxregbisc(AUXIO_FDS, 0); 433 } 434 fdc->sc_nstat = 0; 435 out_fdc(fdc, NE7CMD_RECAL); 436 out_fdc(fdc, drive); 437 /* wait for recalibrate */ 438 for (n = 0; n < 100000; n++) { 439 delay(10); 440 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 441 /* wait a bit longer till device *really* is ready */ 442 delay(100000); 443 if (out_fdc(fdc, NE7CMD_SENSEI)) 444 break; 445 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 446 /* 447 * Got `invalid command'; we interpret it 448 * to mean that the re-calibrate hasn't in 449 * fact finished yet 450 */ 451 continue; 452 break; 453 } 454 } 455 n = fdc->sc_nstat; 456 #ifdef FD_DEBUG 457 if (fdc_debug) { 458 int i; 459 printf("fdprobe: %d stati:", n); 460 for (i = 0; i < n; i++) 461 printf(" %x", fdc->sc_status[i]); 462 printf("\n"); 463 } 464 #endif 465 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 466 return 0; 467 /* turn off motor */ 468 if (fdc->sc_flags & FDC_82077) { 469 /* select drive and turn on motor */ 470 *fdc->sc_reg_dor = FDO_FRST; 471 } else { 472 auxregbisc(0, AUXIO_FDS); 473 } 474 475 return 1; 476 } 477 478 /* 479 * Controller is working, and drive responded. Attach it. 480 */ 481 void 482 fdattach(parent, self, aux) 483 struct device *parent, *self; 484 void *aux; 485 { 486 struct fdc_softc *fdc = (void *)parent; 487 struct fd_softc *fd = (void *)self; 488 struct fdc_attach_args *fa = aux; 489 struct fd_type *type = fa->fa_deftype; 490 int drive = fa->fa_drive; 491 492 /* XXX Allow `flags' to override device type? */ 493 494 if (type) 495 printf(": %s %d cyl, %d head, %d sec\n", type->name, 496 type->tracks, type->heads, type->sectrac); 497 else 498 printf(": density unknown\n"); 499 500 fd->sc_cylin = -1; 501 fd->sc_drive = drive; 502 fd->sc_deftype = type; 503 fdc->sc_fd[drive] = fd; 504 fd->sc_dk.dk_driver = &fddkdriver; 505 506 /* XXX Need to do some more fiddling with sc_dk. */ 507 dk_establish(&fd->sc_dk, &fd->sc_dk.dk_dev); 508 } 509 510 inline struct fd_type * 511 fd_dev_to_type(fd, dev) 512 struct fd_softc *fd; 513 dev_t dev; 514 { 515 int type = FDTYPE(dev); 516 517 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 518 return NULL; 519 return type ? &fd_types[type - 1] : fd->sc_deftype; 520 } 521 522 void 523 fdstrategy(bp) 524 register struct buf *bp; /* IO operation to perform */ 525 { 526 struct fd_softc *fd; 527 int unit = FDUNIT(bp->b_dev); 528 int sz; 529 int s; 530 531 /* Valid unit, controller, and request? */ 532 if (unit >= fdcd.cd_ndevs || 533 (fd = fdcd.cd_devs[unit]) == 0 || 534 bp->b_blkno < 0 || 535 (bp->b_bcount % FDC_BSIZE) != 0) { 536 bp->b_error = EINVAL; 537 goto bad; 538 } 539 540 /* If it's a null transfer, return immediately. */ 541 if (bp->b_bcount == 0) 542 goto done; 543 544 sz = howmany(bp->b_bcount, FDC_BSIZE); 545 546 if (bp->b_blkno + sz > fd->sc_type->size) { 547 sz = fd->sc_type->size - bp->b_blkno; 548 if (sz == 0) { 549 /* If exactly at end of disk, return EOF. */ 550 bp->b_resid = bp->b_bcount; 551 goto done; 552 } 553 if (sz < 0) { 554 /* If past end of disk, return EINVAL. */ 555 bp->b_error = EINVAL; 556 goto bad; 557 } 558 /* Otherwise, truncate request. */ 559 bp->b_bcount = sz << DEV_BSHIFT; 560 } 561 562 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 563 564 #ifdef FD_DEBUG 565 if (fdc_debug > 1) 566 printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d\n", 567 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 568 #endif 569 570 /* Queue transfer on drive, activate drive and controller if idle. */ 571 s = splbio(); 572 disksort(&fd->sc_q, bp); 573 untimeout(fd_motor_off, fd); /* a good idea */ 574 if (!fd->sc_q.b_active) 575 fdstart(fd); 576 #ifdef DIAGNOSTIC 577 else { 578 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 579 if (fdc->sc_state == DEVIDLE) { 580 printf("fdstrategy: controller inactive\n"); 581 fdcstart(fdc); 582 } 583 } 584 #endif 585 splx(s); 586 return; 587 588 bad: 589 bp->b_flags |= B_ERROR; 590 done: 591 /* Toss transfer; we're done early. */ 592 biodone(bp); 593 } 594 595 void 596 fdstart(fd) 597 struct fd_softc *fd; 598 { 599 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 600 int active = fdc->sc_drives.tqh_first != 0; 601 602 /* Link into controller queue. */ 603 fd->sc_q.b_active = 1; 604 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 605 606 /* If controller not already active, start it. */ 607 if (!active) 608 fdcstart(fdc); 609 } 610 611 void 612 fdfinish(fd, bp) 613 struct fd_softc *fd; 614 struct buf *bp; 615 { 616 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 617 618 /* 619 * Move this drive to the end of the queue to give others a `fair' 620 * chance. We only force a switch if N operations are completed while 621 * another drive is waiting to be serviced, since there is a long motor 622 * startup delay whenever we switch. 623 */ 624 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 625 fd->sc_ops = 0; 626 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 627 if (bp->b_actf) { 628 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 629 } else 630 fd->sc_q.b_active = 0; 631 } 632 bp->b_resid = fd->sc_bcount; 633 fd->sc_skip = 0; 634 fd->sc_q.b_actf = bp->b_actf; 635 biodone(bp); 636 /* turn off motor 5s from now */ 637 timeout(fd_motor_off, fd, 5 * hz); 638 fdc->sc_state = DEVIDLE; 639 } 640 641 void 642 fd_set_motor(fdc, reset) 643 struct fdc_softc *fdc; 644 int reset; 645 { 646 struct fd_softc *fd; 647 u_char status; 648 int n; 649 650 if (fdc->sc_flags & FDC_82077) { 651 if (fd = fdc->sc_drives.tqh_first) 652 status = fd->sc_drive; 653 else 654 status = 0; 655 if (!reset) 656 status |= FDO_FRST | FDO_FDMAEN; 657 for (n = 0; n < 4; n++) 658 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 659 status |= FDO_MOEN(n); 660 *fdc->sc_reg_dor = status; 661 } else { 662 int on = 0; 663 664 for (n = 0; n < 4; n++) 665 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 666 on = 1; 667 if (on) { 668 auxregbisc(AUXIO_FDS, 0); 669 } else { 670 auxregbisc(0, AUXIO_FDS); 671 } 672 delay(10); 673 if (reset) { 674 *fdc->sc_reg_drs = DRS_RESET; 675 delay(10); 676 *fdc->sc_reg_drs = 0; 677 #ifdef FD_DEBUG 678 if (fdc_debug) 679 printf("fdc reset\n"); 680 #endif 681 fdconf(fdc); 682 } 683 684 } 685 } 686 687 void 688 fd_motor_off(arg) 689 void *arg; 690 { 691 struct fd_softc *fd = arg; 692 int s; 693 694 s = splbio(); 695 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 696 fd_set_motor((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent, 0); 697 splx(s); 698 } 699 700 void 701 fd_motor_on(arg) 702 void *arg; 703 { 704 struct fd_softc *fd = arg; 705 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 706 int s; 707 708 s = splbio(); 709 fd->sc_flags &= ~FD_MOTOR_WAIT; 710 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 711 (void) fdcswintr(fdc); 712 splx(s); 713 } 714 715 int 716 fdcresult(fdc) 717 struct fdc_softc *fdc; 718 { 719 u_char i; 720 int j = 100000, 721 n = 0; 722 723 for (; j; j--) { 724 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 725 if (i == NE7_RQM) 726 return (fdc->sc_nstat = n); 727 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 728 if (n >= sizeof(fdc->sc_status)) { 729 log(LOG_ERR, "fdcresult: overrun\n"); 730 return -1; 731 } 732 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 733 } 734 } 735 log(LOG_ERR, "fdcresult: timeout\n"); 736 return (fdc->sc_nstat = -1); 737 } 738 739 int 740 out_fdc(fdc, x) 741 struct fdc_softc *fdc; 742 u_char x; 743 { 744 int i = 100000; 745 746 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 747 if (i <= 0) 748 return -1; 749 750 *fdc->sc_reg_fifo = x; 751 return 0; 752 } 753 754 int 755 Fdopen(dev, flags) 756 dev_t dev; 757 int flags; 758 { 759 int unit; 760 struct fd_softc *fd; 761 struct fd_type *type; 762 763 unit = FDUNIT(dev); 764 if (unit >= fdcd.cd_ndevs) 765 return ENXIO; 766 fd = fdcd.cd_devs[unit]; 767 if (fd == 0) 768 return ENXIO; 769 type = fd_dev_to_type(fd, dev); 770 if (type == NULL) 771 return ENXIO; 772 773 if ((fd->sc_flags & FD_OPEN) != 0 && 774 fd->sc_type != type) 775 return EBUSY; 776 777 fd->sc_type = type; 778 fd->sc_cylin = -1; 779 fd->sc_flags |= FD_OPEN; 780 781 return 0; 782 } 783 784 int 785 fdclose(dev, flags) 786 dev_t dev; 787 int flags; 788 { 789 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 790 791 fd->sc_flags &= ~FD_OPEN; 792 return 0; 793 } 794 795 int 796 fdread(dev, uio) 797 dev_t dev; 798 struct uio *uio; 799 { 800 801 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 802 } 803 804 int 805 fdwrite(dev, uio) 806 dev_t dev; 807 struct uio *uio; 808 { 809 810 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 811 } 812 813 void 814 fdcstart(fdc) 815 struct fdc_softc *fdc; 816 { 817 818 #ifdef DIAGNOSTIC 819 /* only got here if controller's drive queue was inactive; should 820 be in idle state */ 821 if (fdc->sc_state != DEVIDLE) { 822 printf("fdcstart: not idle\n"); 823 return; 824 } 825 #endif 826 (void) fdcswintr(fdc); 827 } 828 829 void 830 fdcstatus(dv, n, s) 831 struct device *dv; 832 int n; 833 char *s; 834 { 835 struct fdc_softc *fdc = (void *)dv->dv_parent; 836 837 #if 0 838 /* 839 * A 82072 seems to return <invalid command> on 840 * gratuitous Sense Interrupt commands. 841 */ 842 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 843 out_fdc(fdc, NE7CMD_SENSEI); 844 (void) fdcresult(fdc); 845 n = 2; 846 } 847 #endif 848 849 /* Just print last status */ 850 n = fdc->sc_nstat; 851 852 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 853 854 switch (n) { 855 case 0: 856 printf("\n"); 857 break; 858 case 2: 859 printf(" (st0 %b cyl %d)\n", 860 fdc->sc_status[0], NE7_ST0BITS, 861 fdc->sc_status[1]); 862 break; 863 case 7: 864 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 865 fdc->sc_status[0], NE7_ST0BITS, 866 fdc->sc_status[1], NE7_ST1BITS, 867 fdc->sc_status[2], NE7_ST2BITS, 868 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 869 break; 870 #ifdef DIAGNOSTIC 871 default: 872 printf(" fdcstatus: weird size: %d\n", n); 873 break; 874 #endif 875 } 876 } 877 878 void 879 fdctimeout(arg) 880 void *arg; 881 { 882 struct fdc_softc *fdc = arg; 883 struct fd_softc *fd = fdc->sc_drives.tqh_first; 884 int s; 885 886 s = splbio(); 887 fdcstatus(&fd->sc_dk.dk_dev, 0, "timeout"); 888 889 if (fd->sc_q.b_actf) 890 fdc->sc_state++; 891 else 892 fdc->sc_state = DEVIDLE; 893 894 (void) fdcswintr(fdc); 895 splx(s); 896 } 897 898 void 899 fdcpseudointr(arg) 900 void *arg; 901 { 902 struct fdc_softc *fdc = arg; 903 int s; 904 905 /* Just ensure it has the right spl. */ 906 s = splbio(); 907 (void) fdcswintr(fdc); 908 splx(s); 909 } 910 911 912 #ifdef FDC_C_HANDLER 913 /* 914 * hardware interrupt entry point: must be converted to `fast' 915 * (in-window) handler. 916 */ 917 int 918 fdchwintr(fdc) 919 struct fdc_softc *fdc; 920 { 921 struct buf *bp; 922 int read; 923 924 switch (fdc->sc_istate) { 925 case ISTATE_SENSEI: 926 out_fdc(fdc, NE7CMD_SENSEI); 927 fdcresult(fdc); 928 fdc->sc_istate = ISTATE_IDLE; 929 ienab_bis(IE_FDSOFT); 930 return 1; 931 case ISTATE_IDLE: 932 case ISTATE_SPURIOUS: 933 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 934 fdcresult(fdc); 935 fdc->sc_istate = ISTATE_SPURIOUS; 936 printf("fdc: stray hard interrupt... "); 937 ienab_bis(IE_FDSOFT); 938 return 1; 939 case ISTATE_DMA: 940 break; 941 default: 942 printf("fdc: goofed ...\n"); 943 return 1; 944 } 945 946 read = bp->b_flags & B_READ; 947 for (;;) { 948 register int msr; 949 950 msr = *fdc->sc_reg_msr; 951 952 if ((msr & NE7_RQM) == 0) 953 break; 954 955 if ((msr & NE7_NDM) == 0) { 956 fdcresult(fdc); 957 fdc->sc_istate = ISTATE_IDLE; 958 ienab_bis(IE_FDSOFT); 959 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 960 break; 961 } 962 963 if (msr & NE7_DIO) { 964 #ifdef DIAGNOSTIC 965 if (!read) 966 printf("fdxfer: false read\n"); 967 #endif 968 *fdc->sc_data++ = *fdc->sc_reg_fifo; 969 } else { 970 #ifdef DIAGNOSTIC 971 if (read) 972 printf("fdxfer: false write\n"); 973 #endif 974 *fdc->sc_reg_fifo = *fdc->sc_data++; 975 } 976 if (--fdc->sc_tc == 0) { 977 auxregbisc(AUXIO_FTC, 0); 978 fdc->sc_istate = ISTATE_IDLE; 979 delay(10); 980 auxregbisc(0, AUXIO_FTC); 981 fdcresult(fdc); 982 ienab_bis(IE_FDSOFT); 983 break; 984 } 985 } 986 return 1; 987 } 988 #endif 989 990 int 991 fdcswintr(fdc) 992 struct fdc_softc *fdc; 993 { 994 #define st0 fdc->sc_status[0] 995 #define st1 fdc->sc_status[1] 996 #define cyl fdc->sc_status[1] 997 #define OUT_FDC(fdc, c, s) \ 998 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 999 1000 struct fd_softc *fd; 1001 struct buf *bp; 1002 int read, head, trac, sec, i, s, nblks; 1003 struct fd_type *type; 1004 1005 loop: 1006 if (fdc->sc_istate != ISTATE_IDLE) { 1007 /* Trouble... */ 1008 printf("fdc: spurious interrupt: istate=%d\n", fdc->sc_istate); 1009 fdc->sc_istate = ISTATE_IDLE; 1010 goto doreset; 1011 } 1012 1013 /* Is there a drive for the controller to do a transfer with? */ 1014 fd = fdc->sc_drives.tqh_first; 1015 if (fd == NULL) { 1016 fdc->sc_state = DEVIDLE; 1017 return 0; 1018 } 1019 1020 /* Is there a transfer to this drive? If not, deactivate drive. */ 1021 bp = fd->sc_q.b_actf; 1022 if (bp == NULL) { 1023 fd->sc_ops = 0; 1024 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1025 fd->sc_q.b_active = 0; 1026 goto loop; 1027 } 1028 1029 switch (fdc->sc_state) { 1030 case DEVIDLE: 1031 fdc->sc_errors = 0; 1032 fd->sc_skip = 0; 1033 fd->sc_bcount = bp->b_bcount; 1034 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1035 untimeout(fd_motor_off, fd); 1036 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1037 fdc->sc_state = MOTORWAIT; 1038 return 1; 1039 } 1040 if ((fd->sc_flags & FD_MOTOR) == 0) { 1041 /* Turn on the motor, being careful about pairing. */ 1042 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1043 if (ofd && ofd->sc_flags & FD_MOTOR) { 1044 untimeout(fd_motor_off, ofd); 1045 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1046 } 1047 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1048 fd_set_motor(fdc, 0); 1049 fdc->sc_state = MOTORWAIT; 1050 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1051 /* Allow .25s for motor to stabilize. */ 1052 timeout(fd_motor_on, fd, hz / 4); 1053 } else { 1054 fd->sc_flags &= ~FD_MOTOR_WAIT; 1055 goto loop; 1056 } 1057 return 1; 1058 } 1059 /* Make sure the right drive is selected. */ 1060 fd_set_motor(fdc, 0); 1061 1062 /* fall through */ 1063 case DOSEEK: 1064 doseek: 1065 if (fdc->sc_flags & FDC_EIS) { 1066 fd->sc_cylin = bp->b_cylin; 1067 /* We use implied seek */ 1068 goto doio; 1069 } 1070 1071 if (fd->sc_cylin == bp->b_cylin) 1072 goto doio; 1073 1074 /* specify command */ 1075 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1076 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1077 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1078 1079 fdc->sc_istate = ISTATE_SENSEI; 1080 /* seek function */ 1081 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1082 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1083 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1084 1085 fd->sc_cylin = -1; 1086 fdc->sc_state = SEEKWAIT; 1087 fdc->sc_nstat = 0; 1088 timeout(fdctimeout, fdc, 4 * hz); 1089 return 1; 1090 1091 case DOIO: 1092 doio: 1093 type = fd->sc_type; 1094 sec = fd->sc_blkno % type->seccyl; 1095 nblks = type->seccyl - sec; 1096 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1097 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1098 fd->sc_nblks = nblks; 1099 fd->sc_nbytes = nblks * FDC_BSIZE; 1100 head = sec / type->sectrac; 1101 sec -= head * type->sectrac; 1102 #ifdef DIAGNOSTIC 1103 {int block; 1104 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1105 if (block != fd->sc_blkno) { 1106 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1107 #ifdef DDB 1108 Debugger(); 1109 #endif 1110 }} 1111 #endif 1112 read = bp->b_flags & B_READ; 1113 1114 /* Setup for pseudo DMA */ 1115 fdc->sc_data = bp->b_data + fd->sc_skip; 1116 fdc->sc_tc = fd->sc_nbytes; 1117 1118 *fdc->sc_reg_drs = type->rate; 1119 #ifdef FD_DEBUG 1120 if (fdc_debug > 1) 1121 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1122 read ? "read" : "write", fd->sc_drive, 1123 fd->sc_cylin, head, sec, nblks); 1124 #endif 1125 fdc->sc_state = IOCOMPLETE; 1126 fdc->sc_istate = ISTATE_DMA; 1127 fdc->sc_nstat = 0; 1128 if (read) 1129 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1130 else 1131 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1132 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1133 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1134 OUT_FDC(fdc, head, IOTIMEDOUT); 1135 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1136 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1137 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1138 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1139 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1140 /* allow 2 seconds for operation */ 1141 timeout(fdctimeout, fdc, 2 * hz); 1142 return 1; /* will return later */ 1143 1144 case SEEKWAIT: 1145 untimeout(fdctimeout, fdc); 1146 fdc->sc_state = SEEKCOMPLETE; 1147 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1148 /* allow 1/50 second for heads to settle */ 1149 timeout(fdcpseudointr, fdc, hz / 50); 1150 return 1; /* will return later */ 1151 } 1152 1153 case SEEKCOMPLETE: 1154 /* Make sure seek really happened. */ 1155 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1156 cyl != bp->b_cylin * fd->sc_type->step) { 1157 #ifdef FD_DEBUG 1158 if (fdc_debug) 1159 fdcstatus(&fd->sc_dk.dk_dev, 2, "seek failed"); 1160 #endif 1161 fdcretry(fdc); 1162 goto loop; 1163 } 1164 fd->sc_cylin = bp->b_cylin; 1165 goto doio; 1166 1167 case IOTIMEDOUT: 1168 auxregbisc(AUXIO_FTC, 0); 1169 delay(10); 1170 auxregbisc(0, AUXIO_FTC); 1171 (void)fdcresult(fdc); 1172 case SEEKTIMEDOUT: 1173 case RECALTIMEDOUT: 1174 case RESETTIMEDOUT: 1175 fdcretry(fdc); 1176 goto loop; 1177 1178 case IOCOMPLETE: /* IO DONE, post-analyze */ 1179 untimeout(fdctimeout, fdc); 1180 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1181 #ifdef FD_DEBUG 1182 if (fdc_debug) { 1183 fdcstatus(&fd->sc_dk.dk_dev, 7, 1184 bp->b_flags & B_READ 1185 ? "read failed" : "write failed"); 1186 printf("blkno %d nblks %d tc %d\n", 1187 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1188 } 1189 #endif 1190 if (fdc->sc_nstat == 7 && 1191 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1192 1193 /* 1194 * Silently retry overruns if no other 1195 * error bit is set. Adjust threshold. 1196 */ 1197 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1198 if (thr < 15) { 1199 thr++; 1200 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1201 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1202 #ifdef FD_DEBUG 1203 if (fdc_debug) 1204 printf("fdc: %d -> threshold\n", thr); 1205 #endif 1206 fdconf(fdc); 1207 fdc->sc_state = DOIO; 1208 fdc->sc_overruns = 0; 1209 } 1210 if (++fdc->sc_overruns < 3) 1211 goto loop; 1212 } 1213 fdcretry(fdc); 1214 goto loop; 1215 } 1216 if (fdc->sc_errors) { 1217 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1218 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1219 printf("\n"); 1220 fdc->sc_errors = 0; 1221 } else { 1222 if (--fdc->sc_overruns < -5) { 1223 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1224 if (thr > 0) { 1225 thr--; 1226 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1227 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1228 #ifdef FD_DEBUG 1229 if (fdc_debug) 1230 printf("fdc: %d -> threshold\n", thr); 1231 #endif 1232 fdconf(fdc); 1233 } 1234 fdc->sc_overruns = 0; 1235 } 1236 } 1237 fd->sc_blkno += fd->sc_nblks; 1238 fd->sc_skip += fd->sc_nbytes; 1239 fd->sc_bcount -= fd->sc_nbytes; 1240 if (fd->sc_bcount > 0) { 1241 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1242 goto doseek; 1243 } 1244 fdfinish(fd, bp); 1245 goto loop; 1246 1247 case DORESET: 1248 doreset: 1249 /* try a reset, keep motor on */ 1250 fd_set_motor(fdc, 1); 1251 delay(100); 1252 fd_set_motor(fdc, 0); 1253 fdc->sc_state = RESETCOMPLETE; 1254 timeout(fdctimeout, fdc, hz / 2); 1255 return 1; /* will return later */ 1256 1257 case RESETCOMPLETE: 1258 untimeout(fdctimeout, fdc); 1259 /* clear the controller output buffer */ 1260 for (i = 0; i < 4; i++) { 1261 out_fdc(fdc, NE7CMD_SENSEI); 1262 (void) fdcresult(fdc); 1263 } 1264 1265 /* fall through */ 1266 case DORECAL: 1267 fdc->sc_state = RECALWAIT; 1268 fdc->sc_istate = ISTATE_SENSEI; 1269 fdc->sc_nstat = 0; 1270 /* recalibrate function */ 1271 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1272 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1273 timeout(fdctimeout, fdc, 5 * hz); 1274 return 1; /* will return later */ 1275 1276 case RECALWAIT: 1277 untimeout(fdctimeout, fdc); 1278 fdc->sc_state = RECALCOMPLETE; 1279 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1280 /* allow 1/30 second for heads to settle */ 1281 timeout(fdcpseudointr, fdc, hz / 30); 1282 return 1; /* will return later */ 1283 } 1284 1285 case RECALCOMPLETE: 1286 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1287 #ifdef FD_DEBUG 1288 if (fdc_debug) 1289 fdcstatus(&fd->sc_dk.dk_dev, 2, "recalibrate failed"); 1290 #endif 1291 fdcretry(fdc); 1292 goto loop; 1293 } 1294 fd->sc_cylin = 0; 1295 goto doseek; 1296 1297 case MOTORWAIT: 1298 if (fd->sc_flags & FD_MOTOR_WAIT) 1299 return 1; /* time's not up yet */ 1300 goto doseek; 1301 1302 default: 1303 fdcstatus(&fd->sc_dk.dk_dev, 0, "stray interrupt"); 1304 return 1; 1305 } 1306 #ifdef DIAGNOSTIC 1307 panic("fdcintr: impossible"); 1308 #endif 1309 #undef st0 1310 #undef st1 1311 #undef cyl 1312 } 1313 1314 void 1315 fdcretry(fdc) 1316 struct fdc_softc *fdc; 1317 { 1318 struct fd_softc *fd; 1319 struct buf *bp; 1320 1321 fd = fdc->sc_drives.tqh_first; 1322 bp = fd->sc_q.b_actf; 1323 1324 fdc->sc_overruns = 0; 1325 1326 switch (fdc->sc_errors) { 1327 case 0: 1328 /* try again */ 1329 fdc->sc_state = 1330 (fdc->sc_flags & FDC_EIS) ? DOIO : SEEKCOMPLETE; 1331 break; 1332 1333 case 1: case 2: case 3: 1334 /* didn't work; try recalibrating */ 1335 fdc->sc_state = DORECAL; 1336 break; 1337 1338 case 4: 1339 /* still no go; reset the bastard */ 1340 fdc->sc_state = DORESET; 1341 break; 1342 1343 default: 1344 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1345 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1346 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 1347 fdc->sc_status[0], NE7_ST0BITS, 1348 fdc->sc_status[1], NE7_ST1BITS, 1349 fdc->sc_status[2], NE7_ST2BITS, 1350 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1351 1352 bp->b_flags |= B_ERROR; 1353 bp->b_error = EIO; 1354 fdfinish(fd, bp); 1355 } 1356 fdc->sc_errors++; 1357 } 1358 1359 int 1360 fdsize(dev) 1361 dev_t dev; 1362 { 1363 1364 /* Swapping to floppies would not make sense. */ 1365 return -1; 1366 } 1367 1368 int 1369 fddump() 1370 { 1371 1372 /* Not implemented. */ 1373 return EINVAL; 1374 } 1375 1376 int 1377 fdioctl(dev, cmd, addr, flag) 1378 dev_t dev; 1379 u_long cmd; 1380 caddr_t addr; 1381 int flag; 1382 { 1383 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 1384 struct disklabel buffer; 1385 int error; 1386 1387 switch (cmd) { 1388 case DIOCGDINFO: 1389 bzero(&buffer, sizeof(buffer)); 1390 1391 buffer.d_secpercyl = fd->sc_type->seccyl; 1392 buffer.d_type = DTYPE_FLOPPY; 1393 buffer.d_secsize = FDC_BSIZE; 1394 1395 if (readdisklabel(dev, fdstrategy, &buffer, NULL) != NULL) 1396 return EINVAL; 1397 1398 *(struct disklabel *)addr = buffer; 1399 return 0; 1400 1401 case DIOCWLABEL: 1402 if ((flag & FWRITE) == 0) 1403 return EBADF; 1404 /* XXX do something */ 1405 return 0; 1406 1407 case DIOCWDINFO: 1408 if ((flag & FWRITE) == 0) 1409 return EBADF; 1410 1411 error = setdisklabel(&buffer, (struct disklabel *)addr, 0, NULL); 1412 if (error) 1413 return error; 1414 1415 error = writedisklabel(dev, fdstrategy, &buffer, NULL); 1416 return error; 1417 1418 case FDIOCEJECT: 1419 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1420 delay(10); 1421 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1422 return 0; 1423 #ifdef DEBUG 1424 case _IO('f', 100): 1425 { 1426 int i; 1427 struct fdc_softc *fdc = (struct fdc_softc *) 1428 fd->sc_dk.dk_dev.dv_parent; 1429 1430 out_fdc(fdc, NE7CMD_DUMPREG); 1431 fdcresult(fdc); 1432 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1433 for (i = 0; i < fdc->sc_nstat; i++) 1434 printf(" %x", fdc->sc_status[i]); 1435 printf(">\n"); 1436 } 1437 1438 return 0; 1439 case _IOW('f', 101, int): 1440 ((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent)->sc_cfg &= 1441 ~CFG_THRHLD_MASK; 1442 ((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent)->sc_cfg |= 1443 (*(int *)addr & CFG_THRHLD_MASK); 1444 fdconf(fd->sc_dk.dk_dev.dv_parent); 1445 return 0; 1446 case _IO('f', 102): 1447 { 1448 int i; 1449 struct fdc_softc *fdc = (struct fdc_softc *) 1450 fd->sc_dk.dk_dev.dv_parent; 1451 out_fdc(fdc, NE7CMD_SENSEI); 1452 fdcresult(fdc); 1453 printf("sensei(%d regs): <", fdc->sc_nstat); 1454 for (i=0; i< fdc->sc_nstat; i++) 1455 printf(" 0x%x", fdc->sc_status[i]); 1456 } 1457 printf(">\n"); 1458 return 0; 1459 #endif 1460 default: 1461 return ENOTTY; 1462 } 1463 1464 #ifdef DIAGNOSTIC 1465 panic("fdioctl: impossible"); 1466 #endif 1467 } 1468
Indexes created Fri Oct 03 02:09:57 GMT 2025