fd.c revision 1.19
1 /* $NetBSD: fd.c,v 1.19 1996/01/15 00:14:42 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/stat.h> 56 #include <sys/syslog.h> 57 #include <sys/queue.h> 58 59 #include <machine/cpu.h> 60 #include <machine/autoconf.h> 61 #include <sparc/sparc/auxreg.h> 62 #include <sparc/dev/fdreg.h> 63 #include <sparc/dev/fdvar.h> 64 65 #define FDUNIT(dev) (minor(dev) / 8) 66 #define FDTYPE(dev) (minor(dev) % 8) 67 68 #define b_cylin b_resid 69 70 #define FD_DEBUG 71 #ifdef FD_DEBUG 72 int fdc_debug = 0; 73 #endif 74 75 enum fdc_state { 76 DEVIDLE = 0, 77 MOTORWAIT, 78 DOSEEK, 79 SEEKWAIT, 80 SEEKTIMEDOUT, 81 SEEKCOMPLETE, 82 DOIO, 83 IOCOMPLETE, 84 IOTIMEDOUT, 85 DORESET, 86 RESETCOMPLETE, 87 RESETTIMEDOUT, 88 DORECAL, 89 RECALWAIT, 90 RECALTIMEDOUT, 91 RECALCOMPLETE, 92 }; 93 94 /* software state, per controller */ 95 struct fdc_softc { 96 struct device sc_dev; /* boilerplate */ 97 struct intrhand sc_sih; 98 struct intrhand sc_hih; 99 caddr_t sc_reg; 100 struct fd_softc *sc_fd[4]; /* pointers to children */ 101 TAILQ_HEAD(drivehead, fd_softc) sc_drives; 102 enum fdc_state sc_state; 103 int sc_flags; 104 #define FDC_82077 0x01 105 #define FDC_NEEDHEADSETTLE 0x02 106 #define FDC_EIS 0x04 107 int sc_errors; /* number of retries so far */ 108 int sc_overruns; /* number of DMA overruns */ 109 int sc_cfg; /* current configuration */ 110 struct fdcio sc_io; 111 #define sc_reg_msr sc_io.fdcio_reg_msr 112 #define sc_reg_fifo sc_io.fdcio_reg_fifo 113 #define sc_reg_dor sc_io.fdcio_reg_dor 114 #define sc_reg_drs sc_io.fdcio_reg_msr 115 #define sc_istate sc_io.fdcio_istate 116 #define sc_data sc_io.fdcio_data 117 #define sc_tc sc_io.fdcio_tc 118 #define sc_nstat sc_io.fdcio_nstat 119 #define sc_status sc_io.fdcio_status 120 #define sc_intrcnt sc_io.fdcio_intrcnt 121 }; 122 123 #ifndef FDC_C_HANDLER 124 extern struct fdcio *fdciop; 125 #endif 126 127 /* controller driver configuration */ 128 int fdcmatch __P((struct device *, void *, void *)); 129 void fdcattach __P((struct device *, struct device *, void *)); 130 131 struct cfdriver fdccd = { 132 NULL, "fdc", fdcmatch, fdcattach, DV_DULL, sizeof(struct fdc_softc) 133 }; 134 135 /* 136 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 137 * we tell them apart. 138 */ 139 struct fd_type { 140 int sectrac; /* sectors per track */ 141 int heads; /* number of heads */ 142 int seccyl; /* sectors per cylinder */ 143 int secsize; /* size code for sectors */ 144 int datalen; /* data len when secsize = 0 */ 145 int steprate; /* step rate and head unload time */ 146 int gap1; /* gap len between sectors */ 147 int gap2; /* formatting gap */ 148 int tracks; /* total num of tracks */ 149 int size; /* size of disk in sectors */ 150 int step; /* steps per cylinder */ 151 int rate; /* transfer speed code */ 152 char *name; 153 }; 154 155 /* The order of entries in the following table is important -- BEWARE! */ 156 struct fd_type fd_types[] = { 157 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */ 158 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,"1.2MB" }, /* 1.2 MB AT-diskettes */ 159 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,"360KB/AT" }, /* 360kB in 1.2MB drive */ 160 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,"360KB/PC" }, /* 360kB PC diskettes */ 161 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,"720KB" }, /* 3.5" 720kB diskette */ 162 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,"720KB/x" }, /* 720kB in 1.2MB drive */ 163 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,"360KB/x" }, /* 360kB in 720kB drive */ 164 }; 165 166 /* software state, per disk (with up to 4 disks per ctlr) */ 167 struct fd_softc { 168 struct device sc_dv; /* generic device info */ 169 struct disk sc_dk; /* generic disk info */ 170 171 struct fd_type *sc_deftype; /* default type descriptor */ 172 struct fd_type *sc_type; /* current type descriptor */ 173 174 daddr_t sc_blkno; /* starting block number */ 175 int sc_bcount; /* byte count left */ 176 int sc_skip; /* bytes already transferred */ 177 int sc_nblks; /* number of blocks currently tranferring */ 178 int sc_nbytes; /* number of bytes currently tranferring */ 179 180 int sc_drive; /* physical unit number */ 181 int sc_flags; 182 #define FD_OPEN 0x01 /* it's open */ 183 #define FD_MOTOR 0x02 /* motor should be on */ 184 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 185 int sc_cylin; /* where we think the head is */ 186 187 TAILQ_ENTRY(fd_softc) sc_drivechain; 188 int sc_ops; /* I/O ops since last switch */ 189 struct buf sc_q; /* head of buf chain */ 190 }; 191 192 /* floppy driver configuration */ 193 int fdmatch __P((struct device *, void *, void *)); 194 void fdattach __P((struct device *, struct device *, void *)); 195 196 struct cfdriver fdcd = { 197 NULL, "fd", fdmatch, fdattach, DV_DISK, sizeof(struct fd_softc) 198 }; 199 200 void fdgetdisklabel __P((dev_t)); 201 int fd_get_parms __P((struct fd_softc *)); 202 void fdstrategy __P((struct buf *)); 203 void fdstart __P((struct fd_softc *)); 204 205 struct dkdriver fddkdriver = { fdstrategy }; 206 207 struct fd_type *fd_nvtotype __P((char *, int, int)); 208 void fd_set_motor __P((struct fdc_softc *fdc)); 209 void fd_motor_off __P((void *arg)); 210 void fd_motor_on __P((void *arg)); 211 int fdcresult __P((struct fdc_softc *fdc)); 212 int out_fdc __P((struct fdc_softc *fdc, u_char x)); 213 void fdcstart __P((struct fdc_softc *fdc)); 214 void fdcstatus __P((struct device *dv, int n, char *s)); 215 void fdc_reset __P((struct fdc_softc *fdc)); 216 void fdctimeout __P((void *arg)); 217 void fdcpseudointr __P((void *arg)); 218 #ifdef FDC_C_HANDLER 219 int fdchwintr __P((struct fdc_softc *)); 220 #else 221 void fdchwintr __P((void)); 222 #endif 223 int fdcswintr __P((struct fdc_softc *)); 224 void fdcretry __P((struct fdc_softc *fdc)); 225 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 226 void fd_do_eject __P((void)); 227 void fd_mountroot_hook __P((struct device *)); 228 229 #if PIL_FDSOFT == 4 230 #define IE_FDSOFT IE_L4 231 #else 232 #error 4 233 #endif 234 235 #define OBP_FDNAME (cputyp == CPU_SUN4M ? "SUNW,fdtwo" : "fd") 236 237 int 238 fdcmatch(parent, match, aux) 239 struct device *parent; 240 void *match, *aux; 241 { 242 struct cfdata *cf = match; 243 register struct confargs *ca = aux; 244 register struct romaux *ra = &ca->ca_ra; 245 246 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 247 if (strcmp(OBP_FDNAME, ra->ra_name)) 248 return (0); 249 if (ca->ca_bustype == BUS_MAIN) { 250 if (ca->ca_ra.ra_vaddr && 251 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 252 return (0); 253 } 254 return (1); 255 } 256 257 return (0); 258 } 259 260 /* 261 * Arguments passed between fdcattach and fdprobe. 262 */ 263 struct fdc_attach_args { 264 int fa_drive; 265 int fa_bootdev; 266 struct fd_type *fa_deftype; 267 }; 268 269 /* 270 * Print the location of a disk drive (called just before attaching the 271 * the drive). If `fdc' is not NULL, the drive was found but was not 272 * in the system config file; print the drive name as well. 273 * Return QUIET (config_find ignores this if the device was configured) to 274 * avoid printing `fdN not configured' messages. 275 */ 276 int 277 fdprint(aux, fdc) 278 void *aux; 279 char *fdc; 280 { 281 register struct fdc_attach_args *fa = aux; 282 283 if (!fdc) 284 printf(" drive %d", fa->fa_drive); 285 return QUIET; 286 } 287 288 static void 289 fdconf(fdc) 290 struct fdc_softc *fdc; 291 { 292 int vroom; 293 294 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 295 return; 296 297 /* 298 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 299 * the PROM thinks is appropriate. 300 */ 301 if ((vroom = fdc->sc_status[7]) == 0) 302 vroom = 0x64; 303 304 /* Configure controller to use FIFO and Implied Seek */ 305 out_fdc(fdc, NE7CMD_CFG); 306 out_fdc(fdc, vroom); 307 out_fdc(fdc, fdc->sc_cfg); 308 out_fdc(fdc, 0); /* PRETRK */ 309 /* No result phase */ 310 } 311 312 void 313 fdcattach(parent, self, aux) 314 struct device *parent, *self; 315 void *aux; 316 { 317 register struct confargs *ca = aux; 318 struct fdc_softc *fdc = (void *)self; 319 struct fdc_attach_args fa; 320 int n, pri; 321 char code; 322 323 if (ca->ca_ra.ra_vaddr) 324 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 325 else 326 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_reg, 0, 327 ca->ca_ra.ra_len, 328 ca->ca_bustype); 329 330 fdc->sc_state = DEVIDLE; 331 fdc->sc_istate = ISTATE_IDLE; 332 fdc->sc_flags |= FDC_EIS; 333 TAILQ_INIT(&fdc->sc_drives); 334 335 pri = ca->ca_ra.ra_intr[0].int_pri; 336 #ifdef FDC_C_HANDLER 337 fdc->sc_hih.ih_fun = (void *)fdchwintr; 338 fdc->sc_hih.ih_arg = fdc; 339 intr_establish(pri, &fdc->sc_hih); 340 #else 341 fdciop = &fdc->sc_io; 342 intr_fasttrap(pri, fdchwintr); 343 #endif 344 fdc->sc_sih.ih_fun = (void *)fdcswintr; 345 fdc->sc_sih.ih_arg = fdc; 346 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 347 348 /* Assume a 82077 */ 349 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 350 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 351 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 352 353 code = '7'; 354 if (*fdc->sc_reg_dor == NE7_RQM) { 355 /* 356 * This hack from Chris Torek: apparently DOR really 357 * addresses MSR/DRS on a 82072. 358 * We used to rely on the VERSION command to tell the 359 * difference (which did not work). 360 */ 361 *fdc->sc_reg_dor = FDC_250KBPS; 362 if (*fdc->sc_reg_dor == NE7_RQM) 363 code = '2'; 364 } 365 if (code == '7') { 366 fdc->sc_flags |= FDC_82077; 367 } else { 368 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 369 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 370 fdc->sc_reg_dor = 0; 371 } 372 373 #ifdef FD_DEBUG 374 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 375 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 376 if (fdc_debug) 377 printf("[version cmd]"); 378 } 379 #endif 380 381 /* 382 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 383 * Note: CFG_EFIFO is active-low, initial threshold value: 8 384 */ 385 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 386 fdconf(fdc); 387 388 if (fdc->sc_flags & FDC_82077) { 389 /* Lock configuration across soft resets. */ 390 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 391 if (fdcresult(fdc) != 1) 392 printf(" CFGLOCK: unexpected response"); 393 } 394 395 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 396 397 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 398 399 /* 400 * Controller and drives are represented by one and the same 401 * Openprom node, so we can as well check for the floppy boots here. 402 */ 403 if (ca->ca_ra.ra_bp && 404 strcmp(ca->ca_ra.ra_bp->name, OBP_FDNAME) == 0) { 405 /* 406 * WOAH THERE! It looks like we can get the bootpath 407 * in a couple of different formats!! The faked 408 * bootpath (and some v2?) looks like /fd@0,0 409 * but the real bootpath on some v2 OpenPROM 410 * systems looks like /fd0. We deal with that 411 * bere by looking for either case. --thorpej 412 */ 413 if (((ca->ca_ra.ra_bp->val[0] == 0) && /* /fd@0,0 */ 414 (ca->ca_ra.ra_bp->val[1] == 0)) || 415 ((ca->ca_ra.ra_bp->val[0] == -1) && /* /fd0 */ 416 (ca->ca_ra.ra_bp->val[1] == 0))) 417 fa.fa_bootdev = 1; 418 else 419 fa.fa_bootdev = 0; 420 } 421 422 /* physical limit: four drives per controller. */ 423 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 424 fa.fa_deftype = NULL; /* unknown */ 425 fa.fa_deftype = &fd_types[0]; /* XXX */ 426 (void)config_found(self, (void *)&fa, fdprint); 427 } 428 429 bootpath_store(1, NULL); 430 } 431 432 int 433 fdmatch(parent, match, aux) 434 struct device *parent; 435 void *match, *aux; 436 { 437 struct fdc_softc *fdc = (void *)parent; 438 struct cfdata *cf = match; 439 struct fdc_attach_args *fa = aux; 440 int drive = fa->fa_drive; 441 int n; 442 443 if (drive > 0) 444 /* XXX - for now, punt > 1 drives */ 445 return 0; 446 447 if (fdc->sc_flags & FDC_82077) { 448 /* select drive and turn on motor */ 449 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 450 /* wait for motor to spin up */ 451 delay(250000); 452 } else { 453 auxregbisc(AUXIO_FDS, 0); 454 } 455 fdc->sc_nstat = 0; 456 out_fdc(fdc, NE7CMD_RECAL); 457 out_fdc(fdc, drive); 458 /* wait for recalibrate */ 459 for (n = 0; n < 100000; n++) { 460 delay(10); 461 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 462 /* wait a bit longer till device *really* is ready */ 463 delay(100000); 464 if (out_fdc(fdc, NE7CMD_SENSEI)) 465 break; 466 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 467 /* 468 * Got `invalid command'; we interpret it 469 * to mean that the re-calibrate hasn't in 470 * fact finished yet 471 */ 472 continue; 473 break; 474 } 475 } 476 n = fdc->sc_nstat; 477 #ifdef FD_DEBUG 478 if (fdc_debug) { 479 int i; 480 printf("fdprobe: %d stati:", n); 481 for (i = 0; i < n; i++) 482 printf(" %x", fdc->sc_status[i]); 483 printf("\n"); 484 } 485 #endif 486 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 487 return 0; 488 /* turn off motor */ 489 if (fdc->sc_flags & FDC_82077) { 490 /* select drive and turn on motor */ 491 *fdc->sc_reg_dor = FDO_FRST; 492 } else { 493 auxregbisc(0, AUXIO_FDS); 494 } 495 496 return 1; 497 } 498 499 /* 500 * Controller is working, and drive responded. Attach it. 501 */ 502 void 503 fdattach(parent, self, aux) 504 struct device *parent, *self; 505 void *aux; 506 { 507 struct fdc_softc *fdc = (void *)parent; 508 struct fd_softc *fd = (void *)self; 509 struct fdc_attach_args *fa = aux; 510 struct fd_type *type = fa->fa_deftype; 511 int drive = fa->fa_drive; 512 513 /* XXX Allow `flags' to override device type? */ 514 515 if (type) 516 printf(": %s %d cyl, %d head, %d sec\n", type->name, 517 type->tracks, type->heads, type->sectrac); 518 else 519 printf(": density unknown\n"); 520 521 fd->sc_cylin = -1; 522 fd->sc_drive = drive; 523 fd->sc_deftype = type; 524 fdc->sc_fd[drive] = fd; 525 526 /* 527 * Initialize and attach the disk structure. 528 */ 529 fd->sc_dk.dk_name = fd->sc_dv.dv_xname; 530 fd->sc_dk.dk_driver = &fddkdriver; 531 disk_attach(&fd->sc_dk); 532 533 /* 534 * We're told if we're the boot device in fdcattach(). 535 */ 536 if (fa->fa_bootdev) 537 bootdv = &fd->sc_dv; 538 539 /* 540 * Establish a mountroot_hook anyway in case we booted 541 * with RB_ASKNAME and get selected as the boot device. 542 */ 543 mountroot_hook_establish(fd_mountroot_hook, &fd->sc_dv); 544 545 /* XXX Need to do some more fiddling with sc_dk. */ 546 dk_establish(&fd->sc_dk, &fd->sc_dv); 547 } 548 549 inline struct fd_type * 550 fd_dev_to_type(fd, dev) 551 struct fd_softc *fd; 552 dev_t dev; 553 { 554 int type = FDTYPE(dev); 555 556 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 557 return NULL; 558 return type ? &fd_types[type - 1] : fd->sc_deftype; 559 } 560 561 void 562 fdstrategy(bp) 563 register struct buf *bp; /* IO operation to perform */ 564 { 565 struct fd_softc *fd; 566 int unit = FDUNIT(bp->b_dev); 567 int sz; 568 int s; 569 570 /* Valid unit, controller, and request? */ 571 if (unit >= fdcd.cd_ndevs || 572 (fd = fdcd.cd_devs[unit]) == 0 || 573 bp->b_blkno < 0 || 574 (bp->b_bcount % FDC_BSIZE) != 0) { 575 bp->b_error = EINVAL; 576 goto bad; 577 } 578 579 /* If it's a null transfer, return immediately. */ 580 if (bp->b_bcount == 0) 581 goto done; 582 583 sz = howmany(bp->b_bcount, FDC_BSIZE); 584 585 if (bp->b_blkno + sz > fd->sc_type->size) { 586 sz = fd->sc_type->size - bp->b_blkno; 587 if (sz == 0) { 588 /* If exactly at end of disk, return EOF. */ 589 bp->b_resid = bp->b_bcount; 590 goto done; 591 } 592 if (sz < 0) { 593 /* If past end of disk, return EINVAL. */ 594 bp->b_error = EINVAL; 595 goto bad; 596 } 597 /* Otherwise, truncate request. */ 598 bp->b_bcount = sz << DEV_BSHIFT; 599 } 600 601 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 602 603 #ifdef FD_DEBUG 604 if (fdc_debug > 1) 605 printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d\n", 606 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 607 #endif 608 609 /* Queue transfer on drive, activate drive and controller if idle. */ 610 s = splbio(); 611 disksort(&fd->sc_q, bp); 612 untimeout(fd_motor_off, fd); /* a good idea */ 613 if (!fd->sc_q.b_active) 614 fdstart(fd); 615 #ifdef DIAGNOSTIC 616 else { 617 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 618 if (fdc->sc_state == DEVIDLE) { 619 printf("fdstrategy: controller inactive\n"); 620 fdcstart(fdc); 621 } 622 } 623 #endif 624 splx(s); 625 return; 626 627 bad: 628 bp->b_flags |= B_ERROR; 629 done: 630 /* Toss transfer; we're done early. */ 631 biodone(bp); 632 } 633 634 void 635 fdstart(fd) 636 struct fd_softc *fd; 637 { 638 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 639 int active = fdc->sc_drives.tqh_first != 0; 640 641 /* Link into controller queue. */ 642 fd->sc_q.b_active = 1; 643 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 644 645 /* If controller not already active, start it. */ 646 if (!active) 647 fdcstart(fdc); 648 } 649 650 void 651 fdfinish(fd, bp) 652 struct fd_softc *fd; 653 struct buf *bp; 654 { 655 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 656 657 /* 658 * Move this drive to the end of the queue to give others a `fair' 659 * chance. We only force a switch if N operations are completed while 660 * another drive is waiting to be serviced, since there is a long motor 661 * startup delay whenever we switch. 662 */ 663 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 664 fd->sc_ops = 0; 665 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 666 if (bp->b_actf) { 667 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 668 } else 669 fd->sc_q.b_active = 0; 670 } 671 bp->b_resid = fd->sc_bcount; 672 fd->sc_skip = 0; 673 fd->sc_q.b_actf = bp->b_actf; 674 675 biodone(bp); 676 /* turn off motor 5s from now */ 677 timeout(fd_motor_off, fd, 5 * hz); 678 fdc->sc_state = DEVIDLE; 679 } 680 681 void 682 fdc_reset(fdc) 683 struct fdc_softc *fdc; 684 { 685 if (fdc->sc_flags & FDC_82077) { 686 *fdc->sc_reg_dor = FDO_MOEN(0); 687 } 688 689 *fdc->sc_reg_drs = DRS_RESET; 690 delay(10); 691 *fdc->sc_reg_drs = 0; 692 #ifdef FD_DEBUG 693 if (fdc_debug) 694 printf("fdc reset\n"); 695 #endif 696 } 697 698 void 699 fd_set_motor(fdc) 700 struct fdc_softc *fdc; 701 { 702 struct fd_softc *fd; 703 u_char status; 704 int n; 705 706 if (fdc->sc_flags & FDC_82077) { 707 status = FDO_FRST | FDO_FDMAEN; 708 if (fd = fdc->sc_drives.tqh_first) 709 status |= fd->sc_drive; 710 711 for (n = 0; n < 4; n++) 712 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 713 status |= FDO_MOEN(n); 714 *fdc->sc_reg_dor = status; 715 } else { 716 int on = 0; 717 718 for (n = 0; n < 4; n++) 719 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 720 on = 1; 721 if (on) { 722 auxregbisc(AUXIO_FDS, 0); 723 } else { 724 auxregbisc(0, AUXIO_FDS); 725 } 726 } 727 } 728 729 void 730 fd_motor_off(arg) 731 void *arg; 732 { 733 struct fd_softc *fd = arg; 734 int s; 735 736 s = splbio(); 737 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 738 fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent); 739 splx(s); 740 } 741 742 void 743 fd_motor_on(arg) 744 void *arg; 745 { 746 struct fd_softc *fd = arg; 747 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 748 int s; 749 750 s = splbio(); 751 fd->sc_flags &= ~FD_MOTOR_WAIT; 752 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 753 (void) fdcswintr(fdc); 754 splx(s); 755 } 756 757 int 758 fdcresult(fdc) 759 struct fdc_softc *fdc; 760 { 761 u_char i; 762 int j = 100000, 763 n = 0; 764 765 for (; j; j--) { 766 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 767 if (i == NE7_RQM) 768 return (fdc->sc_nstat = n); 769 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 770 if (n >= sizeof(fdc->sc_status)) { 771 log(LOG_ERR, "fdcresult: overrun\n"); 772 return -1; 773 } 774 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 775 } 776 } 777 log(LOG_ERR, "fdcresult: timeout\n"); 778 return (fdc->sc_nstat = -1); 779 } 780 781 int 782 out_fdc(fdc, x) 783 struct fdc_softc *fdc; 784 u_char x; 785 { 786 int i = 100000; 787 788 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 789 if (i <= 0) 790 return -1; 791 792 *fdc->sc_reg_fifo = x; 793 return 0; 794 } 795 796 int 797 Fdopen(dev, flags, fmt, p) 798 dev_t dev; 799 int flags, fmt; 800 struct proc *p; 801 { 802 int unit, pmask; 803 struct fd_softc *fd; 804 struct fd_type *type; 805 806 unit = FDUNIT(dev); 807 if (unit >= fdcd.cd_ndevs) 808 return ENXIO; 809 fd = fdcd.cd_devs[unit]; 810 if (fd == 0) 811 return ENXIO; 812 type = fd_dev_to_type(fd, dev); 813 if (type == NULL) 814 return ENXIO; 815 816 if ((fd->sc_flags & FD_OPEN) != 0 && 817 fd->sc_type != type) 818 return EBUSY; 819 820 fd->sc_type = type; 821 fd->sc_cylin = -1; 822 fd->sc_flags |= FD_OPEN; 823 824 /* 825 * Only update the disklabel if we're not open anywhere else. 826 */ 827 if (fd->sc_dk.dk_openmask == 0) 828 fdgetdisklabel(dev); 829 830 pmask = (1 << DISKPART(dev)); 831 832 switch (fmt) { 833 case S_IFCHR: 834 fd->sc_dk.dk_copenmask |= pmask; 835 break; 836 837 case S_IFBLK: 838 fd->sc_dk.dk_bopenmask |= pmask; 839 break; 840 } 841 fd->sc_dk.dk_openmask = 842 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 843 844 return 0; 845 } 846 847 int 848 fdclose(dev, flags, fmt, p) 849 dev_t dev; 850 int flags, fmt; 851 struct proc *p; 852 { 853 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 854 int pmask = (1 << DISKPART(dev)); 855 856 fd->sc_flags &= ~FD_OPEN; 857 858 switch (fmt) { 859 case S_IFCHR: 860 fd->sc_dk.dk_copenmask &= ~pmask; 861 break; 862 863 case S_IFBLK: 864 fd->sc_dk.dk_bopenmask &= ~pmask; 865 break; 866 } 867 fd->sc_dk.dk_openmask = 868 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 869 870 return 0; 871 } 872 873 int 874 fdread(dev, uio) 875 dev_t dev; 876 struct uio *uio; 877 { 878 879 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 880 } 881 882 int 883 fdwrite(dev, uio) 884 dev_t dev; 885 struct uio *uio; 886 { 887 888 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 889 } 890 891 void 892 fdcstart(fdc) 893 struct fdc_softc *fdc; 894 { 895 896 #ifdef DIAGNOSTIC 897 /* only got here if controller's drive queue was inactive; should 898 be in idle state */ 899 if (fdc->sc_state != DEVIDLE) { 900 printf("fdcstart: not idle\n"); 901 return; 902 } 903 #endif 904 (void) fdcswintr(fdc); 905 } 906 907 void 908 fdcstatus(dv, n, s) 909 struct device *dv; 910 int n; 911 char *s; 912 { 913 struct fdc_softc *fdc = (void *)dv->dv_parent; 914 915 #if 0 916 /* 917 * A 82072 seems to return <invalid command> on 918 * gratuitous Sense Interrupt commands. 919 */ 920 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 921 out_fdc(fdc, NE7CMD_SENSEI); 922 (void) fdcresult(fdc); 923 n = 2; 924 } 925 #endif 926 927 /* Just print last status */ 928 n = fdc->sc_nstat; 929 930 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 931 932 switch (n) { 933 case 0: 934 printf("\n"); 935 break; 936 case 2: 937 printf(" (st0 %b cyl %d)\n", 938 fdc->sc_status[0], NE7_ST0BITS, 939 fdc->sc_status[1]); 940 break; 941 case 7: 942 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 943 fdc->sc_status[0], NE7_ST0BITS, 944 fdc->sc_status[1], NE7_ST1BITS, 945 fdc->sc_status[2], NE7_ST2BITS, 946 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 947 break; 948 #ifdef DIAGNOSTIC 949 default: 950 printf(" fdcstatus: weird size: %d\n", n); 951 break; 952 #endif 953 } 954 } 955 956 void 957 fdctimeout(arg) 958 void *arg; 959 { 960 struct fdc_softc *fdc = arg; 961 struct fd_softc *fd = fdc->sc_drives.tqh_first; 962 int s; 963 964 s = splbio(); 965 fdcstatus(&fd->sc_dv, 0, "timeout"); 966 967 if (fd->sc_q.b_actf) 968 fdc->sc_state++; 969 else 970 fdc->sc_state = DEVIDLE; 971 972 (void) fdcswintr(fdc); 973 splx(s); 974 } 975 976 void 977 fdcpseudointr(arg) 978 void *arg; 979 { 980 struct fdc_softc *fdc = arg; 981 int s; 982 983 /* Just ensure it has the right spl. */ 984 s = splbio(); 985 (void) fdcswintr(fdc); 986 splx(s); 987 } 988 989 990 #ifdef FDC_C_HANDLER 991 /* 992 * hardware interrupt entry point: must be converted to `fast' 993 * (in-window) handler. 994 */ 995 int 996 fdchwintr(fdc) 997 struct fdc_softc *fdc; 998 { 999 struct buf *bp; 1000 int read; 1001 1002 switch (fdc->sc_istate) { 1003 case ISTATE_SENSEI: 1004 out_fdc(fdc, NE7CMD_SENSEI); 1005 fdcresult(fdc); 1006 fdc->sc_istate = ISTATE_IDLE; 1007 ienab_bis(IE_FDSOFT); 1008 return 1; 1009 case ISTATE_IDLE: 1010 case ISTATE_SPURIOUS: 1011 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 1012 fdcresult(fdc); 1013 fdc->sc_istate = ISTATE_SPURIOUS; 1014 printf("fdc: stray hard interrupt... "); 1015 ienab_bis(IE_FDSOFT); 1016 return 1; 1017 case ISTATE_DMA: 1018 break; 1019 default: 1020 printf("fdc: goofed ...\n"); 1021 return 1; 1022 } 1023 1024 read = bp->b_flags & B_READ; 1025 for (;;) { 1026 register int msr; 1027 1028 msr = *fdc->sc_reg_msr; 1029 1030 if ((msr & NE7_RQM) == 0) 1031 break; 1032 1033 if ((msr & NE7_NDM) == 0) { 1034 fdcresult(fdc); 1035 fdc->sc_istate = ISTATE_IDLE; 1036 ienab_bis(IE_FDSOFT); 1037 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 1038 break; 1039 } 1040 1041 if (msr & NE7_DIO) { 1042 #ifdef DIAGNOSTIC 1043 if (!read) 1044 printf("fdxfer: false read\n"); 1045 #endif 1046 *fdc->sc_data++ = *fdc->sc_reg_fifo; 1047 } else { 1048 #ifdef DIAGNOSTIC 1049 if (read) 1050 printf("fdxfer: false write\n"); 1051 #endif 1052 *fdc->sc_reg_fifo = *fdc->sc_data++; 1053 } 1054 if (--fdc->sc_tc == 0) { 1055 auxregbisc(AUXIO_FTC, 0); 1056 fdc->sc_istate = ISTATE_IDLE; 1057 delay(10); 1058 auxregbisc(0, AUXIO_FTC); 1059 fdcresult(fdc); 1060 ienab_bis(IE_FDSOFT); 1061 break; 1062 } 1063 } 1064 return 1; 1065 } 1066 #endif 1067 1068 int 1069 fdcswintr(fdc) 1070 struct fdc_softc *fdc; 1071 { 1072 #define st0 fdc->sc_status[0] 1073 #define st1 fdc->sc_status[1] 1074 #define cyl fdc->sc_status[1] 1075 #define OUT_FDC(fdc, c, s) \ 1076 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1077 1078 struct fd_softc *fd; 1079 struct buf *bp; 1080 int read, head, trac, sec, i, s, nblks; 1081 struct fd_type *type; 1082 1083 1084 if (fdc->sc_istate != ISTATE_IDLE) { 1085 /* Trouble... */ 1086 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1087 fdc->sc_state, fdc->sc_istate); 1088 fdc->sc_istate = ISTATE_IDLE; 1089 if (fdc->sc_state == RESETCOMPLETE || 1090 fdc->sc_state == RESETTIMEDOUT) { 1091 panic("fdcintr: spurious interrupt can't be cleared"); 1092 } 1093 goto doreset; 1094 } 1095 1096 loop: 1097 /* Is there a drive for the controller to do a transfer with? */ 1098 fd = fdc->sc_drives.tqh_first; 1099 if (fd == NULL) { 1100 fdc->sc_state = DEVIDLE; 1101 return 0; 1102 } 1103 1104 /* Is there a transfer to this drive? If not, deactivate drive. */ 1105 bp = fd->sc_q.b_actf; 1106 if (bp == NULL) { 1107 fd->sc_ops = 0; 1108 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1109 fd->sc_q.b_active = 0; 1110 goto loop; 1111 } 1112 1113 switch (fdc->sc_state) { 1114 case DEVIDLE: 1115 fdc->sc_errors = 0; 1116 fd->sc_skip = 0; 1117 fd->sc_bcount = bp->b_bcount; 1118 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1119 untimeout(fd_motor_off, fd); 1120 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1121 fdc->sc_state = MOTORWAIT; 1122 return 1; 1123 } 1124 if ((fd->sc_flags & FD_MOTOR) == 0) { 1125 /* Turn on the motor, being careful about pairing. */ 1126 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1127 if (ofd && ofd->sc_flags & FD_MOTOR) { 1128 untimeout(fd_motor_off, ofd); 1129 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1130 } 1131 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1132 fd_set_motor(fdc); 1133 fdc->sc_state = MOTORWAIT; 1134 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1135 /* Allow .25s for motor to stabilize. */ 1136 timeout(fd_motor_on, fd, hz / 4); 1137 } else { 1138 fd->sc_flags &= ~FD_MOTOR_WAIT; 1139 goto loop; 1140 } 1141 return 1; 1142 } 1143 /* Make sure the right drive is selected. */ 1144 fd_set_motor(fdc); 1145 1146 /* fall through */ 1147 case DOSEEK: 1148 doseek: 1149 if (fdc->sc_flags & FDC_EIS) { 1150 fd->sc_cylin = bp->b_cylin; 1151 /* We use implied seek */ 1152 goto doio; 1153 } 1154 1155 if (fd->sc_cylin == bp->b_cylin) 1156 goto doio; 1157 1158 /* specify command */ 1159 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1160 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1161 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1162 1163 fdc->sc_istate = ISTATE_SENSEI; 1164 /* seek function */ 1165 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1166 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1167 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1168 1169 fd->sc_cylin = -1; 1170 fdc->sc_state = SEEKWAIT; 1171 fdc->sc_nstat = 0; 1172 1173 fd->sc_dk.dk_seek++; 1174 disk_busy(&fd->sc_dk); 1175 1176 timeout(fdctimeout, fdc, 4 * hz); 1177 return 1; 1178 1179 case DOIO: 1180 doio: 1181 type = fd->sc_type; 1182 sec = fd->sc_blkno % type->seccyl; 1183 nblks = type->seccyl - sec; 1184 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1185 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1186 fd->sc_nblks = nblks; 1187 fd->sc_nbytes = nblks * FDC_BSIZE; 1188 head = sec / type->sectrac; 1189 sec -= head * type->sectrac; 1190 #ifdef DIAGNOSTIC 1191 {int block; 1192 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1193 if (block != fd->sc_blkno) { 1194 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1195 #ifdef DDB 1196 Debugger(); 1197 #endif 1198 }} 1199 #endif 1200 read = bp->b_flags & B_READ; 1201 1202 /* Setup for pseudo DMA */ 1203 fdc->sc_data = bp->b_data + fd->sc_skip; 1204 fdc->sc_tc = fd->sc_nbytes; 1205 1206 *fdc->sc_reg_drs = type->rate; 1207 #ifdef FD_DEBUG 1208 if (fdc_debug > 1) 1209 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1210 read ? "read" : "write", fd->sc_drive, 1211 fd->sc_cylin, head, sec, nblks); 1212 #endif 1213 fdc->sc_state = IOCOMPLETE; 1214 fdc->sc_istate = ISTATE_DMA; 1215 fdc->sc_nstat = 0; 1216 if (read) 1217 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1218 else 1219 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1220 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1221 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1222 OUT_FDC(fdc, head, IOTIMEDOUT); 1223 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1224 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1225 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1226 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1227 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1228 1229 disk_busy(&fd->sc_dk); 1230 1231 /* allow 2 seconds for operation */ 1232 timeout(fdctimeout, fdc, 2 * hz); 1233 return 1; /* will return later */ 1234 1235 case SEEKWAIT: 1236 untimeout(fdctimeout, fdc); 1237 fdc->sc_state = SEEKCOMPLETE; 1238 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1239 /* allow 1/50 second for heads to settle */ 1240 timeout(fdcpseudointr, fdc, hz / 50); 1241 return 1; /* will return later */ 1242 } 1243 1244 case SEEKCOMPLETE: 1245 disk_unbusy(&fd->sc_dk, 0); /* no data on seek */ 1246 1247 /* Make sure seek really happened. */ 1248 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1249 cyl != bp->b_cylin * fd->sc_type->step) { 1250 #ifdef FD_DEBUG 1251 if (fdc_debug) 1252 fdcstatus(&fd->sc_dv, 2, "seek failed"); 1253 #endif 1254 fdcretry(fdc); 1255 goto loop; 1256 } 1257 fd->sc_cylin = bp->b_cylin; 1258 goto doio; 1259 1260 case IOTIMEDOUT: 1261 auxregbisc(AUXIO_FTC, 0); 1262 delay(10); 1263 auxregbisc(0, AUXIO_FTC); 1264 (void)fdcresult(fdc); 1265 case SEEKTIMEDOUT: 1266 case RECALTIMEDOUT: 1267 case RESETTIMEDOUT: 1268 fdcretry(fdc); 1269 goto loop; 1270 1271 case IOCOMPLETE: /* IO DONE, post-analyze */ 1272 untimeout(fdctimeout, fdc); 1273 1274 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid)); 1275 1276 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1277 #ifdef FD_DEBUG 1278 if (fdc_debug) { 1279 fdcstatus(&fd->sc_dv, 7, 1280 bp->b_flags & B_READ 1281 ? "read failed" : "write failed"); 1282 printf("blkno %d nblks %d tc %d\n", 1283 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1284 } 1285 #endif 1286 if (fdc->sc_nstat == 7 && 1287 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1288 1289 /* 1290 * Silently retry overruns if no other 1291 * error bit is set. Adjust threshold. 1292 */ 1293 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1294 if (thr < 15) { 1295 thr++; 1296 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1297 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1298 #ifdef FD_DEBUG 1299 if (fdc_debug) 1300 printf("fdc: %d -> threshold\n", thr); 1301 #endif 1302 fdconf(fdc); 1303 fdc->sc_state = DOIO; 1304 fdc->sc_overruns = 0; 1305 } 1306 if (++fdc->sc_overruns < 3) 1307 goto loop; 1308 } 1309 fdcretry(fdc); 1310 goto loop; 1311 } 1312 if (fdc->sc_errors) { 1313 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1314 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1315 printf("\n"); 1316 fdc->sc_errors = 0; 1317 } else { 1318 if (--fdc->sc_overruns < -20) { 1319 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1320 if (thr > 0) { 1321 thr--; 1322 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1323 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1324 #ifdef FD_DEBUG 1325 if (fdc_debug) 1326 printf("fdc: %d -> threshold\n", thr); 1327 #endif 1328 fdconf(fdc); 1329 } 1330 fdc->sc_overruns = 0; 1331 } 1332 } 1333 fd->sc_blkno += fd->sc_nblks; 1334 fd->sc_skip += fd->sc_nbytes; 1335 fd->sc_bcount -= fd->sc_nbytes; 1336 if (fd->sc_bcount > 0) { 1337 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1338 goto doseek; 1339 } 1340 fdfinish(fd, bp); 1341 goto loop; 1342 1343 case DORESET: 1344 doreset: 1345 /* try a reset, keep motor on */ 1346 fd_set_motor(fdc); 1347 delay(100); 1348 fdc_reset(fdc); 1349 fdc->sc_nstat = 0; 1350 fdc->sc_istate = ISTATE_SENSEI; 1351 fdc->sc_state = RESETCOMPLETE; 1352 timeout(fdctimeout, fdc, hz / 2); 1353 return 1; /* will return later */ 1354 1355 case RESETCOMPLETE: 1356 untimeout(fdctimeout, fdc); 1357 fdconf(fdc); 1358 1359 /* fall through */ 1360 case DORECAL: 1361 fdc->sc_state = RECALWAIT; 1362 fdc->sc_istate = ISTATE_SENSEI; 1363 fdc->sc_nstat = 0; 1364 /* recalibrate function */ 1365 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1366 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1367 timeout(fdctimeout, fdc, 5 * hz); 1368 return 1; /* will return later */ 1369 1370 case RECALWAIT: 1371 untimeout(fdctimeout, fdc); 1372 fdc->sc_state = RECALCOMPLETE; 1373 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1374 /* allow 1/30 second for heads to settle */ 1375 timeout(fdcpseudointr, fdc, hz / 30); 1376 return 1; /* will return later */ 1377 } 1378 1379 case RECALCOMPLETE: 1380 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1381 #ifdef FD_DEBUG 1382 if (fdc_debug) 1383 fdcstatus(&fd->sc_dv, 2, "recalibrate failed"); 1384 #endif 1385 fdcretry(fdc); 1386 goto loop; 1387 } 1388 fd->sc_cylin = 0; 1389 goto doseek; 1390 1391 case MOTORWAIT: 1392 if (fd->sc_flags & FD_MOTOR_WAIT) 1393 return 1; /* time's not up yet */ 1394 goto doseek; 1395 1396 default: 1397 fdcstatus(&fd->sc_dv, 0, "stray interrupt"); 1398 return 1; 1399 } 1400 #ifdef DIAGNOSTIC 1401 panic("fdcintr: impossible"); 1402 #endif 1403 #undef st0 1404 #undef st1 1405 #undef cyl 1406 } 1407 1408 void 1409 fdcretry(fdc) 1410 struct fdc_softc *fdc; 1411 { 1412 struct fd_softc *fd; 1413 struct buf *bp; 1414 1415 fd = fdc->sc_drives.tqh_first; 1416 bp = fd->sc_q.b_actf; 1417 1418 fdc->sc_overruns = 0; 1419 1420 switch (fdc->sc_errors) { 1421 case 0: 1422 /* try again */ 1423 fdc->sc_state = 1424 (fdc->sc_flags & FDC_EIS) ? DOIO : SEEKCOMPLETE; 1425 break; 1426 1427 case 1: case 2: case 3: 1428 /* didn't work; try recalibrating */ 1429 fdc->sc_state = DORECAL; 1430 break; 1431 1432 case 4: 1433 /* still no go; reset the bastard */ 1434 fdc->sc_state = DORESET; 1435 break; 1436 1437 default: 1438 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1439 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1440 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 1441 fdc->sc_status[0], NE7_ST0BITS, 1442 fdc->sc_status[1], NE7_ST1BITS, 1443 fdc->sc_status[2], NE7_ST2BITS, 1444 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1445 1446 bp->b_flags |= B_ERROR; 1447 bp->b_error = EIO; 1448 fdfinish(fd, bp); 1449 } 1450 fdc->sc_errors++; 1451 } 1452 1453 int 1454 fdsize(dev) 1455 dev_t dev; 1456 { 1457 1458 /* Swapping to floppies would not make sense. */ 1459 return -1; 1460 } 1461 1462 int 1463 fddump() 1464 { 1465 1466 /* Not implemented. */ 1467 return EINVAL; 1468 } 1469 1470 int 1471 fdioctl(dev, cmd, addr, flag) 1472 dev_t dev; 1473 u_long cmd; 1474 caddr_t addr; 1475 int flag; 1476 { 1477 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 1478 struct disklabel buffer; 1479 int error; 1480 1481 switch (cmd) { 1482 case DIOCGDINFO: 1483 *(struct disklabel *)addr = *(fd->sc_dk.dk_label); 1484 return 0; 1485 1486 case DIOCWLABEL: 1487 if ((flag & FWRITE) == 0) 1488 return EBADF; 1489 /* XXX do something */ 1490 return 0; 1491 1492 case DIOCWDINFO: 1493 if ((flag & FWRITE) == 0) 1494 return EBADF; 1495 1496 error = setdisklabel(fd->sc_dk.dk_label, 1497 (struct disklabel *)addr, 0, 1498 fd->sc_dk.dk_cpulabel); 1499 if (error) 1500 return error; 1501 1502 error = writedisklabel(dev, fdstrategy, 1503 fd->sc_dk.dk_label, 1504 fd->sc_dk.dk_cpulabel); 1505 return error; 1506 1507 case DIOCEJECT: 1508 fd_do_eject(); 1509 return 0; 1510 1511 #ifdef DEBUG 1512 case _IO('f', 100): 1513 { 1514 int i; 1515 struct fdc_softc *fdc = (struct fdc_softc *) 1516 fd->sc_dv.dv_parent; 1517 1518 out_fdc(fdc, NE7CMD_DUMPREG); 1519 fdcresult(fdc); 1520 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1521 for (i = 0; i < fdc->sc_nstat; i++) 1522 printf(" %x", fdc->sc_status[i]); 1523 printf(">\n"); 1524 } 1525 1526 return 0; 1527 case _IOW('f', 101, int): 1528 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg &= 1529 ~CFG_THRHLD_MASK; 1530 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |= 1531 (*(int *)addr & CFG_THRHLD_MASK); 1532 fdconf(fd->sc_dv.dv_parent); 1533 return 0; 1534 case _IO('f', 102): 1535 { 1536 int i; 1537 struct fdc_softc *fdc = (struct fdc_softc *) 1538 fd->sc_dv.dv_parent; 1539 out_fdc(fdc, NE7CMD_SENSEI); 1540 fdcresult(fdc); 1541 printf("sensei(%d regs): <", fdc->sc_nstat); 1542 for (i=0; i< fdc->sc_nstat; i++) 1543 printf(" 0x%x", fdc->sc_status[i]); 1544 } 1545 printf(">\n"); 1546 return 0; 1547 #endif 1548 default: 1549 return ENOTTY; 1550 } 1551 1552 #ifdef DIAGNOSTIC 1553 panic("fdioctl: impossible"); 1554 #endif 1555 } 1556 1557 void 1558 fdgetdisklabel(dev) 1559 dev_t dev; 1560 { 1561 int unit = FDUNIT(dev), i; 1562 struct fd_softc *fd = fdcd.cd_devs[unit]; 1563 struct disklabel *lp = fd->sc_dk.dk_label; 1564 struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel; 1565 1566 bzero(lp, sizeof(struct disklabel)); 1567 bzero(lp, sizeof(struct cpu_disklabel)); 1568 1569 lp->d_type = DTYPE_FLOPPY; 1570 lp->d_secsize = FDC_BSIZE; 1571 lp->d_secpercyl = fd->sc_type->seccyl; 1572 lp->d_nsectors = fd->sc_type->sectrac; 1573 lp->d_ncylinders = fd->sc_type->tracks; 1574 lp->d_ntracks = fd->sc_type->heads; /* Go figure... */ 1575 lp->d_rpm = 3600; /* XXX like it matters... */ 1576 1577 strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename)); 1578 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 1579 lp->d_interleave = 1; 1580 1581 lp->d_partitions[RAW_PART].p_offset = 0; 1582 lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders; 1583 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1584 lp->d_npartitions = RAW_PART + 1; 1585 1586 lp->d_magic = DISKMAGIC; 1587 lp->d_magic2 = DISKMAGIC; 1588 lp->d_checksum = dkcksum(lp); 1589 1590 /* 1591 * Call the generic disklabel extraction routine. If there's 1592 * not a label there, fake it. 1593 */ 1594 if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) { 1595 strncpy(lp->d_packname, "default label", 1596 sizeof(lp->d_packname)); 1597 /* 1598 * Reset the partition info; it might have gotten 1599 * trashed in readdisklabel(). 1600 * 1601 * XXX Why do we have to do this? readdisklabel() 1602 * should be safe... 1603 */ 1604 for (i = 0; i < MAXPARTITIONS; ++i) { 1605 lp->d_partitions[i].p_offset = 0; 1606 if (i == RAW_PART) { 1607 lp->d_partitions[i].p_size = 1608 lp->d_secpercyl * lp->d_ncylinders; 1609 lp->d_partitions[i].p_fstype = FS_BSDFFS; 1610 } else { 1611 lp->d_partitions[i].p_size = 0; 1612 lp->d_partitions[i].p_fstype = FS_UNUSED; 1613 } 1614 } 1615 lp->d_npartitions = RAW_PART + 1; 1616 } 1617 } 1618 1619 void 1620 fd_do_eject() 1621 { 1622 1623 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1624 delay(10); 1625 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1626 } 1627 1628 /* ARGSUSED */ 1629 void 1630 fd_mountroot_hook(dev) 1631 struct device *dev; 1632 { 1633 int c; 1634 1635 fd_do_eject(); 1636 printf("Insert filesystem floppy and press return."); 1637 for (;;) { 1638 c = cngetc(); 1639 if ((c == '\r') || (c == '\n')) { 1640 printf("\n"); 1641 return; 1642 } 1643 } 1644 } 1645
Indexes created Fri Oct 03 02:09:57 GMT 2025