fd.c revision 1.23
1 /* $NetBSD: fd.c,v 1.23 1996/02/25 21:45:56 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/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 void *sc_sdhook; /* shutdownhook cookie */ 188 189 TAILQ_ENTRY(fd_softc) sc_drivechain; 190 int sc_ops; /* I/O ops since last switch */ 191 struct buf sc_q; /* head of buf chain */ 192 }; 193 194 /* floppy driver configuration */ 195 int fdmatch __P((struct device *, void *, void *)); 196 void fdattach __P((struct device *, struct device *, void *)); 197 198 struct cfdriver fdcd = { 199 NULL, "fd", fdmatch, fdattach, DV_DISK, sizeof(struct fd_softc) 200 }; 201 202 void fdgetdisklabel __P((dev_t)); 203 int fd_get_parms __P((struct fd_softc *)); 204 void fdstrategy __P((struct buf *)); 205 void fdstart __P((struct fd_softc *)); 206 207 struct dkdriver fddkdriver = { fdstrategy }; 208 209 struct fd_type *fd_nvtotype __P((char *, int, int)); 210 void fd_set_motor __P((struct fdc_softc *fdc)); 211 void fd_motor_off __P((void *arg)); 212 void fd_motor_on __P((void *arg)); 213 int fdcresult __P((struct fdc_softc *fdc)); 214 int out_fdc __P((struct fdc_softc *fdc, u_char x)); 215 void fdcstart __P((struct fdc_softc *fdc)); 216 void fdcstatus __P((struct device *dv, int n, char *s)); 217 void fdc_reset __P((struct fdc_softc *fdc)); 218 void fdctimeout __P((void *arg)); 219 void fdcpseudointr __P((void *arg)); 220 #ifdef FDC_C_HANDLER 221 int fdchwintr __P((struct fdc_softc *)); 222 #else 223 void fdchwintr __P((void)); 224 #endif 225 int fdcswintr __P((struct fdc_softc *)); 226 void fdcretry __P((struct fdc_softc *fdc)); 227 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 228 void fd_do_eject __P((void)); 229 void fd_mountroot_hook __P((struct device *)); 230 231 #if PIL_FDSOFT == 4 232 #define IE_FDSOFT IE_L4 233 #else 234 #error 4 235 #endif 236 237 #define OBP_FDNAME (CPU_ISSUN4M ? "SUNW,fdtwo" : "fd") 238 239 int 240 fdcmatch(parent, match, aux) 241 struct device *parent; 242 void *match, *aux; 243 { 244 struct cfdata *cf = match; 245 register struct confargs *ca = aux; 246 register struct romaux *ra = &ca->ca_ra; 247 248 /* 249 * Floppy doesn't exist on sun4. 250 */ 251 if (CPU_ISSUN4) 252 return (0); 253 254 /* 255 * Floppy controller is on mainbus on sun4c. 256 */ 257 if ((CPU_ISSUN4C) && (ca->ca_bustype != BUS_MAIN)) 258 return (0); 259 260 /* 261 * Floppy controller is on obio on sun4m. 262 */ 263 if ((CPU_ISSUN4M) && (ca->ca_bustype != BUS_OBIO)) 264 return (0); 265 266 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 267 if (strcmp(OBP_FDNAME, ra->ra_name)) 268 return (0); 269 270 if (ca->ca_ra.ra_vaddr && 271 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 272 return (0); 273 } 274 275 return (1); 276 } 277 278 /* 279 * Arguments passed between fdcattach and fdprobe. 280 */ 281 struct fdc_attach_args { 282 int fa_drive; 283 int fa_bootdev; 284 struct fd_type *fa_deftype; 285 }; 286 287 /* 288 * Print the location of a disk drive (called just before attaching the 289 * the drive). If `fdc' is not NULL, the drive was found but was not 290 * in the system config file; print the drive name as well. 291 * Return QUIET (config_find ignores this if the device was configured) to 292 * avoid printing `fdN not configured' messages. 293 */ 294 int 295 fdprint(aux, fdc) 296 void *aux; 297 char *fdc; 298 { 299 register struct fdc_attach_args *fa = aux; 300 301 if (!fdc) 302 printf(" drive %d", fa->fa_drive); 303 return QUIET; 304 } 305 306 static void 307 fdconf(fdc) 308 struct fdc_softc *fdc; 309 { 310 int vroom; 311 312 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 313 return; 314 315 /* 316 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 317 * the PROM thinks is appropriate. 318 */ 319 if ((vroom = fdc->sc_status[7]) == 0) 320 vroom = 0x64; 321 322 /* Configure controller to use FIFO and Implied Seek */ 323 out_fdc(fdc, NE7CMD_CFG); 324 out_fdc(fdc, vroom); 325 out_fdc(fdc, fdc->sc_cfg); 326 out_fdc(fdc, 0); /* PRETRK */ 327 /* No result phase */ 328 } 329 330 void 331 fdcattach(parent, self, aux) 332 struct device *parent, *self; 333 void *aux; 334 { 335 register struct confargs *ca = aux; 336 struct fdc_softc *fdc = (void *)self; 337 struct fdc_attach_args fa; 338 struct bootpath *bp; 339 int n, pri; 340 char code; 341 342 if (ca->ca_ra.ra_vaddr) 343 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 344 else 345 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_reg, 0, 346 ca->ca_ra.ra_len, 347 ca->ca_bustype); 348 349 fdc->sc_state = DEVIDLE; 350 fdc->sc_istate = ISTATE_IDLE; 351 fdc->sc_flags |= FDC_EIS; 352 TAILQ_INIT(&fdc->sc_drives); 353 354 pri = ca->ca_ra.ra_intr[0].int_pri; 355 #ifdef FDC_C_HANDLER 356 fdc->sc_hih.ih_fun = (void *)fdchwintr; 357 fdc->sc_hih.ih_arg = fdc; 358 intr_establish(pri, &fdc->sc_hih); 359 #else 360 fdciop = &fdc->sc_io; 361 intr_fasttrap(pri, fdchwintr); 362 #endif 363 fdc->sc_sih.ih_fun = (void *)fdcswintr; 364 fdc->sc_sih.ih_arg = fdc; 365 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 366 367 /* Assume a 82077 */ 368 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 369 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 370 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 371 372 code = '7'; 373 if (*fdc->sc_reg_dor == NE7_RQM) { 374 /* 375 * This hack from Chris Torek: apparently DOR really 376 * addresses MSR/DRS on a 82072. 377 * We used to rely on the VERSION command to tell the 378 * difference (which did not work). 379 */ 380 *fdc->sc_reg_dor = FDC_250KBPS; 381 if (*fdc->sc_reg_dor == NE7_RQM) 382 code = '2'; 383 } 384 if (code == '7') { 385 fdc->sc_flags |= FDC_82077; 386 } else { 387 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 388 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 389 fdc->sc_reg_dor = 0; 390 } 391 392 #ifdef FD_DEBUG 393 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 394 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 395 if (fdc_debug) 396 printf("[version cmd]"); 397 } 398 #endif 399 400 /* 401 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 402 * Note: CFG_EFIFO is active-low, initial threshold value: 8 403 */ 404 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 405 fdconf(fdc); 406 407 if (fdc->sc_flags & FDC_82077) { 408 /* Lock configuration across soft resets. */ 409 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 410 if (fdcresult(fdc) != 1) 411 printf(" CFGLOCK: unexpected response"); 412 } 413 414 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 415 416 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 417 418 /* 419 * Controller and drives are represented by one and the same 420 * Openprom node, so we can as well check for the floppy boots here. 421 */ 422 fa.fa_bootdev = 0; 423 if ((bp = ca->ca_ra.ra_bp) && strcmp(bp->name, OBP_FDNAME) == 0) { 424 /* 425 * WOAH THERE! It looks like we can get the bootpath 426 * in several different formats!! The faked 427 * bootpath (and some v2?) looks like /fd@0,0 428 * but the real bootpath on some v2 OpenPROM 429 * systems looks like /fd0. In the case of 430 * a floppy controller on obio (such as on the sun4m), 431 * we use "slot, offset" to determine if this is the 432 * right one. --thorpej 433 */ 434 switch (ca->ca_bustype) { 435 case BUS_MAIN: 436 if (((bp->val[0] == 0) && /* /fd@0,0 */ 437 (bp->val[1] == 0)) || 438 ((bp->val[0] == -1) && /* /fd0 */ 439 (bp->val[1] == 0))) 440 fa.fa_bootdev = 1; 441 break; 442 443 case BUS_OBIO: 444 /* /obio0/SUNW,fdtwo@0,700000 */ 445 if ((bp->val[0] == ca->ca_slot) && 446 (bp->val[1] == ca->ca_offset)) 447 fa.fa_bootdev = 1; 448 break; 449 } 450 451 } 452 453 /* physical limit: four drives per controller. */ 454 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 455 fa.fa_deftype = NULL; /* unknown */ 456 fa.fa_deftype = &fd_types[0]; /* XXX */ 457 (void)config_found(self, (void *)&fa, fdprint); 458 } 459 460 bootpath_store(1, NULL); 461 } 462 463 int 464 fdmatch(parent, match, aux) 465 struct device *parent; 466 void *match, *aux; 467 { 468 struct fdc_softc *fdc = (void *)parent; 469 struct cfdata *cf = match; 470 struct fdc_attach_args *fa = aux; 471 int drive = fa->fa_drive; 472 int n; 473 474 if (drive > 0) 475 /* XXX - for now, punt > 1 drives */ 476 return 0; 477 478 if (fdc->sc_flags & FDC_82077) { 479 /* select drive and turn on motor */ 480 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 481 /* wait for motor to spin up */ 482 delay(250000); 483 } else { 484 auxregbisc(AUXIO_FDS, 0); 485 } 486 fdc->sc_nstat = 0; 487 out_fdc(fdc, NE7CMD_RECAL); 488 out_fdc(fdc, drive); 489 /* wait for recalibrate */ 490 for (n = 0; n < 100000; n++) { 491 delay(10); 492 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 493 /* wait a bit longer till device *really* is ready */ 494 delay(100000); 495 if (out_fdc(fdc, NE7CMD_SENSEI)) 496 break; 497 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 498 /* 499 * Got `invalid command'; we interpret it 500 * to mean that the re-calibrate hasn't in 501 * fact finished yet 502 */ 503 continue; 504 break; 505 } 506 } 507 n = fdc->sc_nstat; 508 #ifdef FD_DEBUG 509 if (fdc_debug) { 510 int i; 511 printf("fdprobe: %d stati:", n); 512 for (i = 0; i < n; i++) 513 printf(" %x", fdc->sc_status[i]); 514 printf("\n"); 515 } 516 #endif 517 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 518 return 0; 519 /* turn off motor */ 520 if (fdc->sc_flags & FDC_82077) { 521 /* select drive and turn on motor */ 522 *fdc->sc_reg_dor = FDO_FRST; 523 } else { 524 auxregbisc(0, AUXIO_FDS); 525 } 526 527 return 1; 528 } 529 530 /* 531 * Controller is working, and drive responded. Attach it. 532 */ 533 void 534 fdattach(parent, self, aux) 535 struct device *parent, *self; 536 void *aux; 537 { 538 struct fdc_softc *fdc = (void *)parent; 539 struct fd_softc *fd = (void *)self; 540 struct fdc_attach_args *fa = aux; 541 struct fd_type *type = fa->fa_deftype; 542 int drive = fa->fa_drive; 543 544 /* XXX Allow `flags' to override device type? */ 545 546 if (type) 547 printf(": %s %d cyl, %d head, %d sec\n", type->name, 548 type->tracks, type->heads, type->sectrac); 549 else 550 printf(": density unknown\n"); 551 552 fd->sc_cylin = -1; 553 fd->sc_drive = drive; 554 fd->sc_deftype = type; 555 fdc->sc_fd[drive] = fd; 556 557 /* 558 * Initialize and attach the disk structure. 559 */ 560 fd->sc_dk.dk_name = fd->sc_dv.dv_xname; 561 fd->sc_dk.dk_driver = &fddkdriver; 562 disk_attach(&fd->sc_dk); 563 564 /* 565 * We're told if we're the boot device in fdcattach(). 566 */ 567 if (fa->fa_bootdev) 568 bootdv = &fd->sc_dv; 569 570 /* 571 * Establish a mountroot_hook anyway in case we booted 572 * with RB_ASKNAME and get selected as the boot device. 573 */ 574 mountroot_hook_establish(fd_mountroot_hook, &fd->sc_dv); 575 576 /* Make sure the drive motor gets turned off at shutdown time. */ 577 fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd); 578 579 /* XXX Need to do some more fiddling with sc_dk. */ 580 dk_establish(&fd->sc_dk, &fd->sc_dv); 581 } 582 583 inline struct fd_type * 584 fd_dev_to_type(fd, dev) 585 struct fd_softc *fd; 586 dev_t dev; 587 { 588 int type = FDTYPE(dev); 589 590 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 591 return NULL; 592 return type ? &fd_types[type - 1] : fd->sc_deftype; 593 } 594 595 void 596 fdstrategy(bp) 597 register struct buf *bp; /* IO operation to perform */ 598 { 599 struct fd_softc *fd; 600 int unit = FDUNIT(bp->b_dev); 601 int sz; 602 int s; 603 604 /* Valid unit, controller, and request? */ 605 if (unit >= fdcd.cd_ndevs || 606 (fd = fdcd.cd_devs[unit]) == 0 || 607 bp->b_blkno < 0 || 608 (bp->b_bcount % FDC_BSIZE) != 0) { 609 bp->b_error = EINVAL; 610 goto bad; 611 } 612 613 /* If it's a null transfer, return immediately. */ 614 if (bp->b_bcount == 0) 615 goto done; 616 617 sz = howmany(bp->b_bcount, FDC_BSIZE); 618 619 if (bp->b_blkno + sz > fd->sc_type->size) { 620 sz = fd->sc_type->size - bp->b_blkno; 621 if (sz == 0) { 622 /* If exactly at end of disk, return EOF. */ 623 bp->b_resid = bp->b_bcount; 624 goto done; 625 } 626 if (sz < 0) { 627 /* If past end of disk, return EINVAL. */ 628 bp->b_error = EINVAL; 629 goto bad; 630 } 631 /* Otherwise, truncate request. */ 632 bp->b_bcount = sz << DEV_BSHIFT; 633 } 634 635 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 636 637 #ifdef FD_DEBUG 638 if (fdc_debug > 1) 639 printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d\n", 640 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 641 #endif 642 643 /* Queue transfer on drive, activate drive and controller if idle. */ 644 s = splbio(); 645 disksort(&fd->sc_q, bp); 646 untimeout(fd_motor_off, fd); /* a good idea */ 647 if (!fd->sc_q.b_active) 648 fdstart(fd); 649 #ifdef DIAGNOSTIC 650 else { 651 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 652 if (fdc->sc_state == DEVIDLE) { 653 printf("fdstrategy: controller inactive\n"); 654 fdcstart(fdc); 655 } 656 } 657 #endif 658 splx(s); 659 return; 660 661 bad: 662 bp->b_flags |= B_ERROR; 663 done: 664 /* Toss transfer; we're done early. */ 665 biodone(bp); 666 } 667 668 void 669 fdstart(fd) 670 struct fd_softc *fd; 671 { 672 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 673 int active = fdc->sc_drives.tqh_first != 0; 674 675 /* Link into controller queue. */ 676 fd->sc_q.b_active = 1; 677 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 678 679 /* If controller not already active, start it. */ 680 if (!active) 681 fdcstart(fdc); 682 } 683 684 void 685 fdfinish(fd, bp) 686 struct fd_softc *fd; 687 struct buf *bp; 688 { 689 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 690 691 /* 692 * Move this drive to the end of the queue to give others a `fair' 693 * chance. We only force a switch if N operations are completed while 694 * another drive is waiting to be serviced, since there is a long motor 695 * startup delay whenever we switch. 696 */ 697 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 698 fd->sc_ops = 0; 699 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 700 if (bp->b_actf) { 701 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 702 } else 703 fd->sc_q.b_active = 0; 704 } 705 bp->b_resid = fd->sc_bcount; 706 fd->sc_skip = 0; 707 fd->sc_q.b_actf = bp->b_actf; 708 709 biodone(bp); 710 /* turn off motor 5s from now */ 711 timeout(fd_motor_off, fd, 5 * hz); 712 fdc->sc_state = DEVIDLE; 713 } 714 715 void 716 fdc_reset(fdc) 717 struct fdc_softc *fdc; 718 { 719 if (fdc->sc_flags & FDC_82077) { 720 *fdc->sc_reg_dor = FDO_MOEN(0); 721 } 722 723 *fdc->sc_reg_drs = DRS_RESET; 724 delay(10); 725 *fdc->sc_reg_drs = 0; 726 #ifdef FD_DEBUG 727 if (fdc_debug) 728 printf("fdc reset\n"); 729 #endif 730 } 731 732 void 733 fd_set_motor(fdc) 734 struct fdc_softc *fdc; 735 { 736 struct fd_softc *fd; 737 u_char status; 738 int n; 739 740 if (fdc->sc_flags & FDC_82077) { 741 status = FDO_FRST | FDO_FDMAEN; 742 if (fd = fdc->sc_drives.tqh_first) 743 status |= fd->sc_drive; 744 745 for (n = 0; n < 4; n++) 746 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 747 status |= FDO_MOEN(n); 748 *fdc->sc_reg_dor = status; 749 } else { 750 int on = 0; 751 752 for (n = 0; n < 4; n++) 753 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 754 on = 1; 755 if (on) { 756 auxregbisc(AUXIO_FDS, 0); 757 } else { 758 auxregbisc(0, AUXIO_FDS); 759 } 760 } 761 } 762 763 void 764 fd_motor_off(arg) 765 void *arg; 766 { 767 struct fd_softc *fd = arg; 768 int s; 769 770 s = splbio(); 771 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 772 fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent); 773 splx(s); 774 } 775 776 void 777 fd_motor_on(arg) 778 void *arg; 779 { 780 struct fd_softc *fd = arg; 781 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 782 int s; 783 784 s = splbio(); 785 fd->sc_flags &= ~FD_MOTOR_WAIT; 786 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 787 (void) fdcswintr(fdc); 788 splx(s); 789 } 790 791 int 792 fdcresult(fdc) 793 struct fdc_softc *fdc; 794 { 795 u_char i; 796 int j = 100000, 797 n = 0; 798 799 for (; j; j--) { 800 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 801 if (i == NE7_RQM) 802 return (fdc->sc_nstat = n); 803 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 804 if (n >= sizeof(fdc->sc_status)) { 805 log(LOG_ERR, "fdcresult: overrun\n"); 806 return -1; 807 } 808 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 809 } 810 } 811 log(LOG_ERR, "fdcresult: timeout\n"); 812 return (fdc->sc_nstat = -1); 813 } 814 815 int 816 out_fdc(fdc, x) 817 struct fdc_softc *fdc; 818 u_char x; 819 { 820 int i = 100000; 821 822 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 823 if (i <= 0) 824 return -1; 825 826 *fdc->sc_reg_fifo = x; 827 return 0; 828 } 829 830 int 831 Fdopen(dev, flags, fmt, p) 832 dev_t dev; 833 int flags, fmt; 834 struct proc *p; 835 { 836 int unit, pmask; 837 struct fd_softc *fd; 838 struct fd_type *type; 839 840 unit = FDUNIT(dev); 841 if (unit >= fdcd.cd_ndevs) 842 return ENXIO; 843 fd = fdcd.cd_devs[unit]; 844 if (fd == 0) 845 return ENXIO; 846 type = fd_dev_to_type(fd, dev); 847 if (type == NULL) 848 return ENXIO; 849 850 if ((fd->sc_flags & FD_OPEN) != 0 && 851 fd->sc_type != type) 852 return EBUSY; 853 854 fd->sc_type = type; 855 fd->sc_cylin = -1; 856 fd->sc_flags |= FD_OPEN; 857 858 /* 859 * Only update the disklabel if we're not open anywhere else. 860 */ 861 if (fd->sc_dk.dk_openmask == 0) 862 fdgetdisklabel(dev); 863 864 pmask = (1 << DISKPART(dev)); 865 866 switch (fmt) { 867 case S_IFCHR: 868 fd->sc_dk.dk_copenmask |= pmask; 869 break; 870 871 case S_IFBLK: 872 fd->sc_dk.dk_bopenmask |= pmask; 873 break; 874 } 875 fd->sc_dk.dk_openmask = 876 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 877 878 return 0; 879 } 880 881 int 882 fdclose(dev, flags, fmt, p) 883 dev_t dev; 884 int flags, fmt; 885 struct proc *p; 886 { 887 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 888 int pmask = (1 << DISKPART(dev)); 889 890 fd->sc_flags &= ~FD_OPEN; 891 892 switch (fmt) { 893 case S_IFCHR: 894 fd->sc_dk.dk_copenmask &= ~pmask; 895 break; 896 897 case S_IFBLK: 898 fd->sc_dk.dk_bopenmask &= ~pmask; 899 break; 900 } 901 fd->sc_dk.dk_openmask = 902 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 903 904 return 0; 905 } 906 907 int 908 fdread(dev, uio) 909 dev_t dev; 910 struct uio *uio; 911 { 912 913 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 914 } 915 916 int 917 fdwrite(dev, uio) 918 dev_t dev; 919 struct uio *uio; 920 { 921 922 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 923 } 924 925 void 926 fdcstart(fdc) 927 struct fdc_softc *fdc; 928 { 929 930 #ifdef DIAGNOSTIC 931 /* only got here if controller's drive queue was inactive; should 932 be in idle state */ 933 if (fdc->sc_state != DEVIDLE) { 934 printf("fdcstart: not idle\n"); 935 return; 936 } 937 #endif 938 (void) fdcswintr(fdc); 939 } 940 941 void 942 fdcstatus(dv, n, s) 943 struct device *dv; 944 int n; 945 char *s; 946 { 947 struct fdc_softc *fdc = (void *)dv->dv_parent; 948 949 #if 0 950 /* 951 * A 82072 seems to return <invalid command> on 952 * gratuitous Sense Interrupt commands. 953 */ 954 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 955 out_fdc(fdc, NE7CMD_SENSEI); 956 (void) fdcresult(fdc); 957 n = 2; 958 } 959 #endif 960 961 /* Just print last status */ 962 n = fdc->sc_nstat; 963 964 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 965 966 switch (n) { 967 case 0: 968 printf("\n"); 969 break; 970 case 2: 971 printf(" (st0 %b cyl %d)\n", 972 fdc->sc_status[0], NE7_ST0BITS, 973 fdc->sc_status[1]); 974 break; 975 case 7: 976 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 977 fdc->sc_status[0], NE7_ST0BITS, 978 fdc->sc_status[1], NE7_ST1BITS, 979 fdc->sc_status[2], NE7_ST2BITS, 980 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 981 break; 982 #ifdef DIAGNOSTIC 983 default: 984 printf(" fdcstatus: weird size: %d\n", n); 985 break; 986 #endif 987 } 988 } 989 990 void 991 fdctimeout(arg) 992 void *arg; 993 { 994 struct fdc_softc *fdc = arg; 995 struct fd_softc *fd = fdc->sc_drives.tqh_first; 996 int s; 997 998 s = splbio(); 999 fdcstatus(&fd->sc_dv, 0, "timeout"); 1000 1001 if (fd->sc_q.b_actf) 1002 fdc->sc_state++; 1003 else 1004 fdc->sc_state = DEVIDLE; 1005 1006 (void) fdcswintr(fdc); 1007 splx(s); 1008 } 1009 1010 void 1011 fdcpseudointr(arg) 1012 void *arg; 1013 { 1014 struct fdc_softc *fdc = arg; 1015 int s; 1016 1017 /* Just ensure it has the right spl. */ 1018 s = splbio(); 1019 (void) fdcswintr(fdc); 1020 splx(s); 1021 } 1022 1023 1024 #ifdef FDC_C_HANDLER 1025 /* 1026 * hardware interrupt entry point: must be converted to `fast' 1027 * (in-window) handler. 1028 */ 1029 int 1030 fdchwintr(fdc) 1031 struct fdc_softc *fdc; 1032 { 1033 struct buf *bp; 1034 int read; 1035 1036 switch (fdc->sc_istate) { 1037 case ISTATE_SENSEI: 1038 out_fdc(fdc, NE7CMD_SENSEI); 1039 fdcresult(fdc); 1040 fdc->sc_istate = ISTATE_IDLE; 1041 ienab_bis(IE_FDSOFT); 1042 return 1; 1043 case ISTATE_IDLE: 1044 case ISTATE_SPURIOUS: 1045 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 1046 fdcresult(fdc); 1047 fdc->sc_istate = ISTATE_SPURIOUS; 1048 printf("fdc: stray hard interrupt... "); 1049 ienab_bis(IE_FDSOFT); 1050 return 1; 1051 case ISTATE_DMA: 1052 break; 1053 default: 1054 printf("fdc: goofed ...\n"); 1055 return 1; 1056 } 1057 1058 read = bp->b_flags & B_READ; 1059 for (;;) { 1060 register int msr; 1061 1062 msr = *fdc->sc_reg_msr; 1063 1064 if ((msr & NE7_RQM) == 0) 1065 break; 1066 1067 if ((msr & NE7_NDM) == 0) { 1068 fdcresult(fdc); 1069 fdc->sc_istate = ISTATE_IDLE; 1070 ienab_bis(IE_FDSOFT); 1071 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 1072 break; 1073 } 1074 1075 if (msr & NE7_DIO) { 1076 #ifdef DIAGNOSTIC 1077 if (!read) 1078 printf("fdxfer: false read\n"); 1079 #endif 1080 *fdc->sc_data++ = *fdc->sc_reg_fifo; 1081 } else { 1082 #ifdef DIAGNOSTIC 1083 if (read) 1084 printf("fdxfer: false write\n"); 1085 #endif 1086 *fdc->sc_reg_fifo = *fdc->sc_data++; 1087 } 1088 if (--fdc->sc_tc == 0) { 1089 auxregbisc(AUXIO_FTC, 0); 1090 fdc->sc_istate = ISTATE_IDLE; 1091 delay(10); 1092 auxregbisc(0, AUXIO_FTC); 1093 fdcresult(fdc); 1094 ienab_bis(IE_FDSOFT); 1095 break; 1096 } 1097 } 1098 return 1; 1099 } 1100 #endif 1101 1102 int 1103 fdcswintr(fdc) 1104 struct fdc_softc *fdc; 1105 { 1106 #define st0 fdc->sc_status[0] 1107 #define st1 fdc->sc_status[1] 1108 #define cyl fdc->sc_status[1] 1109 #define OUT_FDC(fdc, c, s) \ 1110 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1111 1112 struct fd_softc *fd; 1113 struct buf *bp; 1114 int read, head, trac, sec, i, s, nblks; 1115 struct fd_type *type; 1116 1117 1118 if (fdc->sc_istate != ISTATE_IDLE) { 1119 /* Trouble... */ 1120 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1121 fdc->sc_state, fdc->sc_istate); 1122 fdc->sc_istate = ISTATE_IDLE; 1123 if (fdc->sc_state == RESETCOMPLETE || 1124 fdc->sc_state == RESETTIMEDOUT) { 1125 panic("fdcintr: spurious interrupt can't be cleared"); 1126 } 1127 goto doreset; 1128 } 1129 1130 loop: 1131 /* Is there a drive for the controller to do a transfer with? */ 1132 fd = fdc->sc_drives.tqh_first; 1133 if (fd == NULL) { 1134 fdc->sc_state = DEVIDLE; 1135 return 0; 1136 } 1137 1138 /* Is there a transfer to this drive? If not, deactivate drive. */ 1139 bp = fd->sc_q.b_actf; 1140 if (bp == NULL) { 1141 fd->sc_ops = 0; 1142 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1143 fd->sc_q.b_active = 0; 1144 goto loop; 1145 } 1146 1147 switch (fdc->sc_state) { 1148 case DEVIDLE: 1149 fdc->sc_errors = 0; 1150 fd->sc_skip = 0; 1151 fd->sc_bcount = bp->b_bcount; 1152 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1153 untimeout(fd_motor_off, fd); 1154 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1155 fdc->sc_state = MOTORWAIT; 1156 return 1; 1157 } 1158 if ((fd->sc_flags & FD_MOTOR) == 0) { 1159 /* Turn on the motor, being careful about pairing. */ 1160 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1161 if (ofd && ofd->sc_flags & FD_MOTOR) { 1162 untimeout(fd_motor_off, ofd); 1163 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1164 } 1165 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1166 fd_set_motor(fdc); 1167 fdc->sc_state = MOTORWAIT; 1168 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1169 /* Allow .25s for motor to stabilize. */ 1170 timeout(fd_motor_on, fd, hz / 4); 1171 } else { 1172 fd->sc_flags &= ~FD_MOTOR_WAIT; 1173 goto loop; 1174 } 1175 return 1; 1176 } 1177 /* Make sure the right drive is selected. */ 1178 fd_set_motor(fdc); 1179 1180 /* fall through */ 1181 case DOSEEK: 1182 doseek: 1183 if (fdc->sc_flags & FDC_EIS) { 1184 fd->sc_cylin = bp->b_cylin; 1185 /* We use implied seek */ 1186 goto doio; 1187 } 1188 1189 if (fd->sc_cylin == bp->b_cylin) 1190 goto doio; 1191 1192 /* specify command */ 1193 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1194 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1195 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1196 1197 fdc->sc_istate = ISTATE_SENSEI; 1198 /* seek function */ 1199 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1200 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1201 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1202 1203 fd->sc_cylin = -1; 1204 fdc->sc_state = SEEKWAIT; 1205 fdc->sc_nstat = 0; 1206 1207 fd->sc_dk.dk_seek++; 1208 disk_busy(&fd->sc_dk); 1209 1210 timeout(fdctimeout, fdc, 4 * hz); 1211 return 1; 1212 1213 case DOIO: 1214 doio: 1215 type = fd->sc_type; 1216 sec = fd->sc_blkno % type->seccyl; 1217 nblks = type->seccyl - sec; 1218 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1219 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1220 fd->sc_nblks = nblks; 1221 fd->sc_nbytes = nblks * FDC_BSIZE; 1222 head = sec / type->sectrac; 1223 sec -= head * type->sectrac; 1224 #ifdef DIAGNOSTIC 1225 {int block; 1226 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1227 if (block != fd->sc_blkno) { 1228 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1229 #ifdef DDB 1230 Debugger(); 1231 #endif 1232 }} 1233 #endif 1234 read = bp->b_flags & B_READ; 1235 1236 /* Setup for pseudo DMA */ 1237 fdc->sc_data = bp->b_data + fd->sc_skip; 1238 fdc->sc_tc = fd->sc_nbytes; 1239 1240 *fdc->sc_reg_drs = type->rate; 1241 #ifdef FD_DEBUG 1242 if (fdc_debug > 1) 1243 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1244 read ? "read" : "write", fd->sc_drive, 1245 fd->sc_cylin, head, sec, nblks); 1246 #endif 1247 fdc->sc_state = IOCOMPLETE; 1248 fdc->sc_istate = ISTATE_DMA; 1249 fdc->sc_nstat = 0; 1250 if (read) 1251 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1252 else 1253 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1254 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1255 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1256 OUT_FDC(fdc, head, IOTIMEDOUT); 1257 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1258 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1259 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1260 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1261 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1262 1263 disk_busy(&fd->sc_dk); 1264 1265 /* allow 2 seconds for operation */ 1266 timeout(fdctimeout, fdc, 2 * hz); 1267 return 1; /* will return later */ 1268 1269 case SEEKWAIT: 1270 untimeout(fdctimeout, fdc); 1271 fdc->sc_state = SEEKCOMPLETE; 1272 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1273 /* allow 1/50 second for heads to settle */ 1274 timeout(fdcpseudointr, fdc, hz / 50); 1275 return 1; /* will return later */ 1276 } 1277 1278 case SEEKCOMPLETE: 1279 disk_unbusy(&fd->sc_dk, 0); /* no data on seek */ 1280 1281 /* Make sure seek really happened. */ 1282 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1283 cyl != bp->b_cylin * fd->sc_type->step) { 1284 #ifdef FD_DEBUG 1285 if (fdc_debug) 1286 fdcstatus(&fd->sc_dv, 2, "seek failed"); 1287 #endif 1288 fdcretry(fdc); 1289 goto loop; 1290 } 1291 fd->sc_cylin = bp->b_cylin; 1292 goto doio; 1293 1294 case IOTIMEDOUT: 1295 auxregbisc(AUXIO_FTC, 0); 1296 delay(10); 1297 auxregbisc(0, AUXIO_FTC); 1298 (void)fdcresult(fdc); 1299 case SEEKTIMEDOUT: 1300 case RECALTIMEDOUT: 1301 case RESETTIMEDOUT: 1302 fdcretry(fdc); 1303 goto loop; 1304 1305 case IOCOMPLETE: /* IO DONE, post-analyze */ 1306 untimeout(fdctimeout, fdc); 1307 1308 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid)); 1309 1310 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1311 #ifdef FD_DEBUG 1312 if (fdc_debug) { 1313 fdcstatus(&fd->sc_dv, 7, 1314 bp->b_flags & B_READ 1315 ? "read failed" : "write failed"); 1316 printf("blkno %d nblks %d tc %d\n", 1317 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1318 } 1319 #endif 1320 if (fdc->sc_nstat == 7 && 1321 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1322 1323 /* 1324 * Silently retry overruns if no other 1325 * error bit is set. Adjust threshold. 1326 */ 1327 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1328 if (thr < 15) { 1329 thr++; 1330 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1331 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1332 #ifdef FD_DEBUG 1333 if (fdc_debug) 1334 printf("fdc: %d -> threshold\n", thr); 1335 #endif 1336 fdconf(fdc); 1337 fdc->sc_state = DOIO; 1338 fdc->sc_overruns = 0; 1339 } 1340 if (++fdc->sc_overruns < 3) 1341 goto loop; 1342 } 1343 fdcretry(fdc); 1344 goto loop; 1345 } 1346 if (fdc->sc_errors) { 1347 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1348 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1349 printf("\n"); 1350 fdc->sc_errors = 0; 1351 } else { 1352 if (--fdc->sc_overruns < -20) { 1353 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1354 if (thr > 0) { 1355 thr--; 1356 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1357 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1358 #ifdef FD_DEBUG 1359 if (fdc_debug) 1360 printf("fdc: %d -> threshold\n", thr); 1361 #endif 1362 fdconf(fdc); 1363 } 1364 fdc->sc_overruns = 0; 1365 } 1366 } 1367 fd->sc_blkno += fd->sc_nblks; 1368 fd->sc_skip += fd->sc_nbytes; 1369 fd->sc_bcount -= fd->sc_nbytes; 1370 if (fd->sc_bcount > 0) { 1371 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1372 goto doseek; 1373 } 1374 fdfinish(fd, bp); 1375 goto loop; 1376 1377 case DORESET: 1378 doreset: 1379 /* try a reset, keep motor on */ 1380 fd_set_motor(fdc); 1381 delay(100); 1382 fdc_reset(fdc); 1383 fdc->sc_nstat = 0; 1384 fdc->sc_istate = ISTATE_SENSEI; 1385 fdc->sc_state = RESETCOMPLETE; 1386 timeout(fdctimeout, fdc, hz / 2); 1387 return 1; /* will return later */ 1388 1389 case RESETCOMPLETE: 1390 untimeout(fdctimeout, fdc); 1391 fdconf(fdc); 1392 1393 /* fall through */ 1394 case DORECAL: 1395 fdc->sc_state = RECALWAIT; 1396 fdc->sc_istate = ISTATE_SENSEI; 1397 fdc->sc_nstat = 0; 1398 /* recalibrate function */ 1399 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1400 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1401 timeout(fdctimeout, fdc, 5 * hz); 1402 return 1; /* will return later */ 1403 1404 case RECALWAIT: 1405 untimeout(fdctimeout, fdc); 1406 fdc->sc_state = RECALCOMPLETE; 1407 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1408 /* allow 1/30 second for heads to settle */ 1409 timeout(fdcpseudointr, fdc, hz / 30); 1410 return 1; /* will return later */ 1411 } 1412 1413 case RECALCOMPLETE: 1414 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1415 #ifdef FD_DEBUG 1416 if (fdc_debug) 1417 fdcstatus(&fd->sc_dv, 2, "recalibrate failed"); 1418 #endif 1419 fdcretry(fdc); 1420 goto loop; 1421 } 1422 fd->sc_cylin = 0; 1423 goto doseek; 1424 1425 case MOTORWAIT: 1426 if (fd->sc_flags & FD_MOTOR_WAIT) 1427 return 1; /* time's not up yet */ 1428 goto doseek; 1429 1430 default: 1431 fdcstatus(&fd->sc_dv, 0, "stray interrupt"); 1432 return 1; 1433 } 1434 #ifdef DIAGNOSTIC 1435 panic("fdcintr: impossible"); 1436 #endif 1437 #undef st0 1438 #undef st1 1439 #undef cyl 1440 } 1441 1442 void 1443 fdcretry(fdc) 1444 struct fdc_softc *fdc; 1445 { 1446 struct fd_softc *fd; 1447 struct buf *bp; 1448 1449 fd = fdc->sc_drives.tqh_first; 1450 bp = fd->sc_q.b_actf; 1451 1452 fdc->sc_overruns = 0; 1453 1454 switch (fdc->sc_errors) { 1455 case 0: 1456 /* try again */ 1457 fdc->sc_state = 1458 (fdc->sc_flags & FDC_EIS) ? DOIO : DOSEEK; 1459 break; 1460 1461 case 1: case 2: case 3: 1462 /* didn't work; try recalibrating */ 1463 fdc->sc_state = DORECAL; 1464 break; 1465 1466 case 4: 1467 /* still no go; reset the bastard */ 1468 fdc->sc_state = DORESET; 1469 break; 1470 1471 default: 1472 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1473 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1474 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 1475 fdc->sc_status[0], NE7_ST0BITS, 1476 fdc->sc_status[1], NE7_ST1BITS, 1477 fdc->sc_status[2], NE7_ST2BITS, 1478 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1479 1480 bp->b_flags |= B_ERROR; 1481 bp->b_error = EIO; 1482 fdfinish(fd, bp); 1483 } 1484 fdc->sc_errors++; 1485 } 1486 1487 int 1488 fdsize(dev) 1489 dev_t dev; 1490 { 1491 1492 /* Swapping to floppies would not make sense. */ 1493 return -1; 1494 } 1495 1496 int 1497 fddump() 1498 { 1499 1500 /* Not implemented. */ 1501 return EINVAL; 1502 } 1503 1504 int 1505 fdioctl(dev, cmd, addr, flag) 1506 dev_t dev; 1507 u_long cmd; 1508 caddr_t addr; 1509 int flag; 1510 { 1511 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 1512 struct disklabel buffer; 1513 int error; 1514 1515 switch (cmd) { 1516 case DIOCGDINFO: 1517 *(struct disklabel *)addr = *(fd->sc_dk.dk_label); 1518 return 0; 1519 1520 case DIOCWLABEL: 1521 if ((flag & FWRITE) == 0) 1522 return EBADF; 1523 /* XXX do something */ 1524 return 0; 1525 1526 case DIOCWDINFO: 1527 if ((flag & FWRITE) == 0) 1528 return EBADF; 1529 1530 error = setdisklabel(fd->sc_dk.dk_label, 1531 (struct disklabel *)addr, 0, 1532 fd->sc_dk.dk_cpulabel); 1533 if (error) 1534 return error; 1535 1536 error = writedisklabel(dev, fdstrategy, 1537 fd->sc_dk.dk_label, 1538 fd->sc_dk.dk_cpulabel); 1539 return error; 1540 1541 case DIOCLOCK: 1542 /* 1543 * Nothing to do here, really. 1544 */ 1545 return 0; 1546 1547 case DIOCEJECT: 1548 fd_do_eject(); 1549 return 0; 1550 1551 #ifdef DEBUG 1552 case _IO('f', 100): 1553 { 1554 int i; 1555 struct fdc_softc *fdc = (struct fdc_softc *) 1556 fd->sc_dv.dv_parent; 1557 1558 out_fdc(fdc, NE7CMD_DUMPREG); 1559 fdcresult(fdc); 1560 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1561 for (i = 0; i < fdc->sc_nstat; i++) 1562 printf(" %x", fdc->sc_status[i]); 1563 printf(">\n"); 1564 } 1565 1566 return 0; 1567 case _IOW('f', 101, int): 1568 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg &= 1569 ~CFG_THRHLD_MASK; 1570 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |= 1571 (*(int *)addr & CFG_THRHLD_MASK); 1572 fdconf(fd->sc_dv.dv_parent); 1573 return 0; 1574 case _IO('f', 102): 1575 { 1576 int i; 1577 struct fdc_softc *fdc = (struct fdc_softc *) 1578 fd->sc_dv.dv_parent; 1579 out_fdc(fdc, NE7CMD_SENSEI); 1580 fdcresult(fdc); 1581 printf("sensei(%d regs): <", fdc->sc_nstat); 1582 for (i=0; i< fdc->sc_nstat; i++) 1583 printf(" 0x%x", fdc->sc_status[i]); 1584 } 1585 printf(">\n"); 1586 return 0; 1587 #endif 1588 default: 1589 return ENOTTY; 1590 } 1591 1592 #ifdef DIAGNOSTIC 1593 panic("fdioctl: impossible"); 1594 #endif 1595 } 1596 1597 void 1598 fdgetdisklabel(dev) 1599 dev_t dev; 1600 { 1601 int unit = FDUNIT(dev), i; 1602 struct fd_softc *fd = fdcd.cd_devs[unit]; 1603 struct disklabel *lp = fd->sc_dk.dk_label; 1604 struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel; 1605 1606 bzero(lp, sizeof(struct disklabel)); 1607 bzero(lp, sizeof(struct cpu_disklabel)); 1608 1609 lp->d_type = DTYPE_FLOPPY; 1610 lp->d_secsize = FDC_BSIZE; 1611 lp->d_secpercyl = fd->sc_type->seccyl; 1612 lp->d_nsectors = fd->sc_type->sectrac; 1613 lp->d_ncylinders = fd->sc_type->tracks; 1614 lp->d_ntracks = fd->sc_type->heads; /* Go figure... */ 1615 lp->d_rpm = 3600; /* XXX like it matters... */ 1616 1617 strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename)); 1618 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 1619 lp->d_interleave = 1; 1620 1621 lp->d_partitions[RAW_PART].p_offset = 0; 1622 lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders; 1623 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1624 lp->d_npartitions = RAW_PART + 1; 1625 1626 lp->d_magic = DISKMAGIC; 1627 lp->d_magic2 = DISKMAGIC; 1628 lp->d_checksum = dkcksum(lp); 1629 1630 /* 1631 * Call the generic disklabel extraction routine. If there's 1632 * not a label there, fake it. 1633 */ 1634 if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) { 1635 strncpy(lp->d_packname, "default label", 1636 sizeof(lp->d_packname)); 1637 /* 1638 * Reset the partition info; it might have gotten 1639 * trashed in readdisklabel(). 1640 * 1641 * XXX Why do we have to do this? readdisklabel() 1642 * should be safe... 1643 */ 1644 for (i = 0; i < MAXPARTITIONS; ++i) { 1645 lp->d_partitions[i].p_offset = 0; 1646 if (i == RAW_PART) { 1647 lp->d_partitions[i].p_size = 1648 lp->d_secpercyl * lp->d_ncylinders; 1649 lp->d_partitions[i].p_fstype = FS_BSDFFS; 1650 } else { 1651 lp->d_partitions[i].p_size = 0; 1652 lp->d_partitions[i].p_fstype = FS_UNUSED; 1653 } 1654 } 1655 lp->d_npartitions = RAW_PART + 1; 1656 } 1657 } 1658 1659 void 1660 fd_do_eject() 1661 { 1662 1663 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1664 delay(10); 1665 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1666 } 1667 1668 /* ARGSUSED */ 1669 void 1670 fd_mountroot_hook(dev) 1671 struct device *dev; 1672 { 1673 int c; 1674 1675 fd_do_eject(); 1676 printf("Insert filesystem floppy and press return."); 1677 for (;;) { 1678 c = cngetc(); 1679 if ((c == '\r') || (c == '\n')) { 1680 printf("\n"); 1681 return; 1682 } 1683 } 1684 } 1685
Indexes created Fri Oct 03 02:09:57 GMT 2025