fd.c revision 1.33.4.1
1 /* $NetBSD: fd.c,v 1.33.4.1 1996/06/12 20:52:25 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/file.h> 47 #include <sys/ioctl.h> 48 #include <sys/device.h> 49 #include <sys/disklabel.h> 50 #include <sys/dkstat.h> 51 #include <sys/disk.h> 52 #include <sys/buf.h> 53 #include <sys/uio.h> 54 #include <sys/stat.h> 55 #include <sys/syslog.h> 56 #include <sys/queue.h> 57 #include <sys/conf.h> 58 59 #include <dev/cons.h> 60 61 #include <machine/cpu.h> 62 #include <machine/autoconf.h> 63 #include <machine/conf.h> 64 65 #include <sparc/sparc/auxreg.h> 66 #include <sparc/dev/fdreg.h> 67 #include <sparc/dev/fdvar.h> 68 69 #define FDUNIT(dev) (minor(dev) / 8) 70 #define FDTYPE(dev) (minor(dev) % 8) 71 72 #define b_cylin b_resid 73 74 #define FD_DEBUG 75 #ifdef FD_DEBUG 76 int fdc_debug = 0; 77 #endif 78 79 enum fdc_state { 80 DEVIDLE = 0, 81 MOTORWAIT, 82 DOSEEK, 83 SEEKWAIT, 84 SEEKTIMEDOUT, 85 SEEKCOMPLETE, 86 DOIO, 87 IOCOMPLETE, 88 IOTIMEDOUT, 89 DORESET, 90 RESETCOMPLETE, 91 RESETTIMEDOUT, 92 DORECAL, 93 RECALWAIT, 94 RECALTIMEDOUT, 95 RECALCOMPLETE, 96 }; 97 98 /* software state, per controller */ 99 struct fdc_softc { 100 struct device sc_dev; /* boilerplate */ 101 struct intrhand sc_sih; 102 struct intrhand sc_hih; 103 caddr_t sc_reg; 104 struct fd_softc *sc_fd[4]; /* pointers to children */ 105 TAILQ_HEAD(drivehead, fd_softc) sc_drives; 106 enum fdc_state sc_state; 107 int sc_flags; 108 #define FDC_82077 0x01 109 #define FDC_NEEDHEADSETTLE 0x02 110 #define FDC_EIS 0x04 111 int sc_errors; /* number of retries so far */ 112 int sc_overruns; /* number of DMA overruns */ 113 int sc_cfg; /* current configuration */ 114 struct fdcio sc_io; 115 #define sc_reg_msr sc_io.fdcio_reg_msr 116 #define sc_reg_fifo sc_io.fdcio_reg_fifo 117 #define sc_reg_dor sc_io.fdcio_reg_dor 118 #define sc_reg_drs sc_io.fdcio_reg_msr 119 #define sc_istate sc_io.fdcio_istate 120 #define sc_data sc_io.fdcio_data 121 #define sc_tc sc_io.fdcio_tc 122 #define sc_nstat sc_io.fdcio_nstat 123 #define sc_status sc_io.fdcio_status 124 #define sc_intrcnt sc_io.fdcio_intrcnt 125 }; 126 127 #ifndef FDC_C_HANDLER 128 extern struct fdcio *fdciop; 129 #endif 130 131 /* controller driver configuration */ 132 int fdcmatch __P((struct device *, void *, void *)); 133 void fdcattach __P((struct device *, struct device *, void *)); 134 135 struct cfattach fdc_ca = { 136 sizeof(struct fdc_softc), fdcmatch, fdcattach 137 }; 138 139 struct cfdriver fdc_cd = { 140 NULL, "fdc", DV_DULL 141 }; 142 143 __inline struct fd_type *fd_dev_to_type __P((struct fd_softc *, dev_t)); 144 145 /* 146 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 147 * we tell them apart. 148 */ 149 struct fd_type { 150 int sectrac; /* sectors per track */ 151 int heads; /* number of heads */ 152 int seccyl; /* sectors per cylinder */ 153 int secsize; /* size code for sectors */ 154 int datalen; /* data len when secsize = 0 */ 155 int steprate; /* step rate and head unload time */ 156 int gap1; /* gap len between sectors */ 157 int gap2; /* formatting gap */ 158 int tracks; /* total num of tracks */ 159 int size; /* size of disk in sectors */ 160 int step; /* steps per cylinder */ 161 int rate; /* transfer speed code */ 162 char *name; 163 }; 164 165 /* The order of entries in the following table is important -- BEWARE! */ 166 struct fd_type fd_types[] = { 167 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */ 168 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,"1.2MB" }, /* 1.2 MB AT-diskettes */ 169 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,"360KB/AT" }, /* 360kB in 1.2MB drive */ 170 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,"360KB/PC" }, /* 360kB PC diskettes */ 171 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,"720KB" }, /* 3.5" 720kB diskette */ 172 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,"720KB/x" }, /* 720kB in 1.2MB drive */ 173 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,"360KB/x" }, /* 360kB in 720kB drive */ 174 }; 175 176 /* software state, per disk (with up to 4 disks per ctlr) */ 177 struct fd_softc { 178 struct device sc_dv; /* generic device info */ 179 struct disk sc_dk; /* generic disk info */ 180 181 struct fd_type *sc_deftype; /* default type descriptor */ 182 struct fd_type *sc_type; /* current type descriptor */ 183 184 daddr_t sc_blkno; /* starting block number */ 185 int sc_bcount; /* byte count left */ 186 int sc_skip; /* bytes already transferred */ 187 int sc_nblks; /* number of blocks currently tranferring */ 188 int sc_nbytes; /* number of bytes currently tranferring */ 189 190 int sc_drive; /* physical unit number */ 191 int sc_flags; 192 #define FD_OPEN 0x01 /* it's open */ 193 #define FD_MOTOR 0x02 /* motor should be on */ 194 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 195 int sc_cylin; /* where we think the head is */ 196 197 void *sc_sdhook; /* shutdownhook cookie */ 198 199 TAILQ_ENTRY(fd_softc) sc_drivechain; 200 int sc_ops; /* I/O ops since last switch */ 201 struct buf sc_q; /* head of buf chain */ 202 }; 203 204 /* floppy driver configuration */ 205 int fdmatch __P((struct device *, void *, void *)); 206 void fdattach __P((struct device *, struct device *, void *)); 207 208 struct cfattach fd_ca = { 209 sizeof(struct fd_softc), fdmatch, fdattach 210 }; 211 212 struct cfdriver fd_cd = { 213 NULL, "fd", DV_DISK 214 }; 215 216 void fdgetdisklabel __P((dev_t)); 217 int fd_get_parms __P((struct fd_softc *)); 218 void fdstrategy __P((struct buf *)); 219 void fdstart __P((struct fd_softc *)); 220 int fdprint __P((void *, char *)); 221 222 struct dkdriver fddkdriver = { fdstrategy }; 223 224 struct fd_type *fd_nvtotype __P((char *, int, int)); 225 void fd_set_motor __P((struct fdc_softc *fdc)); 226 void fd_motor_off __P((void *arg)); 227 void fd_motor_on __P((void *arg)); 228 int fdcresult __P((struct fdc_softc *fdc)); 229 int out_fdc __P((struct fdc_softc *fdc, u_char x)); 230 void fdcstart __P((struct fdc_softc *fdc)); 231 void fdcstatus __P((struct device *dv, int n, char *s)); 232 void fdc_reset __P((struct fdc_softc *fdc)); 233 void fdctimeout __P((void *arg)); 234 void fdcpseudointr __P((void *arg)); 235 #ifdef FDC_C_HANDLER 236 int fdchwintr __P((struct fdc_softc *)); 237 #else 238 void fdchwintr __P((void)); 239 #endif 240 int fdcswintr __P((struct fdc_softc *)); 241 void fdcretry __P((struct fdc_softc *fdc)); 242 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 243 void fd_do_eject __P((void)); 244 void fd_mountroot_hook __P((struct device *)); 245 static void fdconf __P((struct fdc_softc *)); 246 247 #if PIL_FDSOFT == 4 248 #define IE_FDSOFT IE_L4 249 #else 250 #error 4 251 #endif 252 253 #define OBP_FDNAME (CPU_ISSUN4M ? "SUNW,fdtwo" : "fd") 254 255 int 256 fdcmatch(parent, match, aux) 257 struct device *parent; 258 void *match, *aux; 259 { 260 register struct confargs *ca = aux; 261 register struct romaux *ra = &ca->ca_ra; 262 263 /* 264 * Floppy doesn't exist on sun4. 265 */ 266 if (CPU_ISSUN4) 267 return (0); 268 269 /* 270 * Floppy controller is on mainbus on sun4c. 271 */ 272 if ((CPU_ISSUN4C) && (ca->ca_bustype != BUS_MAIN)) 273 return (0); 274 275 /* 276 * Floppy controller is on obio on sun4m. 277 */ 278 if ((CPU_ISSUN4M) && (ca->ca_bustype != BUS_OBIO)) 279 return (0); 280 281 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 282 if (strcmp(OBP_FDNAME, ra->ra_name)) 283 return (0); 284 285 if (ca->ca_ra.ra_vaddr && 286 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 287 return (0); 288 } 289 290 return (1); 291 } 292 293 /* 294 * Arguments passed between fdcattach and fdprobe. 295 */ 296 struct fdc_attach_args { 297 int fa_drive; 298 struct bootpath *fa_bootpath; 299 struct fd_type *fa_deftype; 300 }; 301 302 /* 303 * Print the location of a disk drive (called just before attaching the 304 * the drive). If `fdc' is not NULL, the drive was found but was not 305 * in the system config file; print the drive name as well. 306 * Return QUIET (config_find ignores this if the device was configured) to 307 * avoid printing `fdN not configured' messages. 308 */ 309 int 310 fdprint(aux, fdc) 311 void *aux; 312 char *fdc; 313 { 314 register struct fdc_attach_args *fa = aux; 315 316 if (!fdc) 317 printf(" drive %d", fa->fa_drive); 318 return QUIET; 319 } 320 321 static void 322 fdconf(fdc) 323 struct fdc_softc *fdc; 324 { 325 int vroom; 326 327 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 328 return; 329 330 /* 331 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 332 * the PROM thinks is appropriate. 333 */ 334 if ((vroom = fdc->sc_status[7]) == 0) 335 vroom = 0x64; 336 337 /* Configure controller to use FIFO and Implied Seek */ 338 out_fdc(fdc, NE7CMD_CFG); 339 out_fdc(fdc, vroom); 340 out_fdc(fdc, fdc->sc_cfg); 341 out_fdc(fdc, 0); /* PRETRK */ 342 /* No result phase */ 343 } 344 345 void 346 fdcattach(parent, self, aux) 347 struct device *parent, *self; 348 void *aux; 349 { 350 register struct confargs *ca = aux; 351 struct fdc_softc *fdc = (void *)self; 352 struct fdc_attach_args fa; 353 struct bootpath *bp; 354 int pri; 355 char code; 356 357 if (ca->ca_ra.ra_vaddr) 358 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 359 else 360 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_reg, 0, 361 ca->ca_ra.ra_len, 362 ca->ca_bustype); 363 364 fdc->sc_state = DEVIDLE; 365 fdc->sc_istate = ISTATE_IDLE; 366 fdc->sc_flags |= FDC_EIS; 367 TAILQ_INIT(&fdc->sc_drives); 368 369 pri = ca->ca_ra.ra_intr[0].int_pri; 370 #ifdef FDC_C_HANDLER 371 fdc->sc_hih.ih_fun = (void *)fdchwintr; 372 fdc->sc_hih.ih_arg = fdc; 373 intr_establish(pri, &fdc->sc_hih); 374 #else 375 fdciop = &fdc->sc_io; 376 intr_fasttrap(pri, fdchwintr); 377 #endif 378 fdc->sc_sih.ih_fun = (void *)fdcswintr; 379 fdc->sc_sih.ih_arg = fdc; 380 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 381 382 /* Assume a 82077 */ 383 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 384 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 385 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 386 387 code = '7'; 388 if (*fdc->sc_reg_dor == NE7_RQM) { 389 /* 390 * This hack from Chris Torek: apparently DOR really 391 * addresses MSR/DRS on a 82072. 392 * We used to rely on the VERSION command to tell the 393 * difference (which did not work). 394 */ 395 *fdc->sc_reg_dor = FDC_250KBPS; 396 if (*fdc->sc_reg_dor == NE7_RQM) 397 code = '2'; 398 } 399 if (code == '7') { 400 fdc->sc_flags |= FDC_82077; 401 } else { 402 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 403 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 404 fdc->sc_reg_dor = 0; 405 } 406 407 #ifdef FD_DEBUG 408 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 409 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 410 if (fdc_debug) 411 printf("[version cmd]"); 412 } 413 #endif 414 415 /* 416 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 417 * Note: CFG_EFIFO is active-low, initial threshold value: 8 418 */ 419 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 420 fdconf(fdc); 421 422 if (fdc->sc_flags & FDC_82077) { 423 /* Lock configuration across soft resets. */ 424 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 425 if (fdcresult(fdc) != 1) 426 printf(" CFGLOCK: unexpected response"); 427 } 428 429 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 430 431 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 432 433 /* 434 * Controller and drives are represented by one and the same 435 * Openprom node, so we can as well check for the floppy boots here. 436 */ 437 fa.fa_bootpath = 0; 438 if ((bp = ca->ca_ra.ra_bp) && strcmp(bp->name, OBP_FDNAME) == 0) { 439 /* 440 * WOAH THERE! It looks like we can get the bootpath 441 * in several different formats!! The faked 442 * bootpath (and some v2?) looks like /fd@0,0 443 * but the real bootpath on some v2 OpenPROM 444 * systems looks like /fd0. In the case of 445 * a floppy controller on obio (such as on the sun4m), 446 * we use "slot, offset" to determine if this is the 447 * right one. --thorpej 448 */ 449 switch (ca->ca_bustype) { 450 case BUS_MAIN: 451 if (((bp->val[0] == 0) && /* /fd@0,0 */ 452 (bp->val[1] == 0)) || 453 ((bp->val[0] == -1) && /* /fd0 */ 454 (bp->val[1] == 0))) 455 fa.fa_bootpath = bp; 456 break; 457 458 case BUS_OBIO: 459 /* /obio0/SUNW,fdtwo@0,700000 */ 460 if ((bp->val[0] == ca->ca_slot) && 461 (bp->val[1] == ca->ca_offset)) 462 fa.fa_bootpath = bp; 463 break; 464 } 465 466 } 467 468 /* physical limit: four drives per controller. */ 469 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 470 fa.fa_deftype = NULL; /* unknown */ 471 fa.fa_deftype = &fd_types[0]; /* XXX */ 472 (void)config_found(self, (void *)&fa, fdprint); 473 } 474 475 bootpath_store(1, NULL); 476 } 477 478 int 479 fdmatch(parent, match, aux) 480 struct device *parent; 481 void *match, *aux; 482 { 483 struct fdc_softc *fdc = (void *)parent; 484 struct fdc_attach_args *fa = aux; 485 int drive = fa->fa_drive; 486 int n, ok; 487 488 if (drive > 0) 489 /* XXX - for now, punt > 1 drives */ 490 return 0; 491 492 if (fdc->sc_flags & FDC_82077) { 493 /* select drive and turn on motor */ 494 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 495 /* wait for motor to spin up */ 496 delay(250000); 497 } else { 498 auxregbisc(AUXIO_FDS, 0); 499 } 500 fdc->sc_nstat = 0; 501 out_fdc(fdc, NE7CMD_RECAL); 502 out_fdc(fdc, drive); 503 /* wait for recalibrate */ 504 for (n = 0; n < 10000; n++) { 505 delay(1000); 506 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 507 /* wait a bit longer till device *really* is ready */ 508 delay(100000); 509 if (out_fdc(fdc, NE7CMD_SENSEI)) 510 break; 511 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 512 /* 513 * Got `invalid command'; we interpret it 514 * to mean that the re-calibrate hasn't in 515 * fact finished yet 516 */ 517 continue; 518 break; 519 } 520 } 521 n = fdc->sc_nstat; 522 #ifdef FD_DEBUG 523 if (fdc_debug) { 524 int i; 525 printf("fdprobe: %d stati:", n); 526 for (i = 0; i < n; i++) 527 printf(" %x", fdc->sc_status[i]); 528 printf("\n"); 529 } 530 #endif 531 ok = (n == 2 && (fdc->sc_status[0] & 0xf8) == 0x20) ? 1 : 0; 532 533 /* turn off motor */ 534 if (fdc->sc_flags & FDC_82077) { 535 /* select drive and turn on motor */ 536 *fdc->sc_reg_dor = FDO_FRST; 537 } else { 538 auxregbisc(0, AUXIO_FDS); 539 } 540 541 return ok; 542 } 543 544 /* 545 * Controller is working, and drive responded. Attach it. 546 */ 547 void 548 fdattach(parent, self, aux) 549 struct device *parent, *self; 550 void *aux; 551 { 552 struct fdc_softc *fdc = (void *)parent; 553 struct fd_softc *fd = (void *)self; 554 struct fdc_attach_args *fa = aux; 555 struct fd_type *type = fa->fa_deftype; 556 int drive = fa->fa_drive; 557 558 /* XXX Allow `flags' to override device type? */ 559 560 if (type) 561 printf(": %s %d cyl, %d head, %d sec\n", type->name, 562 type->tracks, type->heads, type->sectrac); 563 else 564 printf(": density unknown\n"); 565 566 fd->sc_cylin = -1; 567 fd->sc_drive = drive; 568 fd->sc_deftype = type; 569 fdc->sc_fd[drive] = fd; 570 571 /* 572 * Initialize and attach the disk structure. 573 */ 574 fd->sc_dk.dk_name = fd->sc_dv.dv_xname; 575 fd->sc_dk.dk_driver = &fddkdriver; 576 disk_attach(&fd->sc_dk); 577 578 /* 579 * We're told if we're the boot device in fdcattach(). 580 */ 581 if (fa->fa_bootpath) 582 fa->fa_bootpath->dev = &fd->sc_dv; 583 584 /* 585 * Establish a mountroot_hook anyway in case we booted 586 * with RB_ASKNAME and get selected as the boot device. 587 */ 588 mountroot_hook_establish(fd_mountroot_hook, &fd->sc_dv); 589 590 /* Make sure the drive motor gets turned off at shutdown time. */ 591 fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd); 592 593 /* XXX Need to do some more fiddling with sc_dk. */ 594 dk_establish(&fd->sc_dk, &fd->sc_dv); 595 } 596 597 __inline struct fd_type * 598 fd_dev_to_type(fd, dev) 599 struct fd_softc *fd; 600 dev_t dev; 601 { 602 int type = FDTYPE(dev); 603 604 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 605 return NULL; 606 return type ? &fd_types[type - 1] : fd->sc_deftype; 607 } 608 609 void 610 fdstrategy(bp) 611 register struct buf *bp; /* IO operation to perform */ 612 { 613 struct fd_softc *fd; 614 int unit = FDUNIT(bp->b_dev); 615 int sz; 616 int s; 617 618 /* Valid unit, controller, and request? */ 619 if (unit >= fd_cd.cd_ndevs || 620 (fd = fd_cd.cd_devs[unit]) == 0 || 621 bp->b_blkno < 0 || 622 (bp->b_bcount % FDC_BSIZE) != 0) { 623 bp->b_error = EINVAL; 624 goto bad; 625 } 626 627 /* If it's a null transfer, return immediately. */ 628 if (bp->b_bcount == 0) 629 goto done; 630 631 sz = howmany(bp->b_bcount, FDC_BSIZE); 632 633 if (bp->b_blkno + sz > fd->sc_type->size) { 634 sz = fd->sc_type->size - bp->b_blkno; 635 if (sz == 0) { 636 /* If exactly at end of disk, return EOF. */ 637 bp->b_resid = bp->b_bcount; 638 goto done; 639 } 640 if (sz < 0) { 641 /* If past end of disk, return EINVAL. */ 642 bp->b_error = EINVAL; 643 goto bad; 644 } 645 /* Otherwise, truncate request. */ 646 bp->b_bcount = sz << DEV_BSHIFT; 647 } 648 649 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 650 651 #ifdef FD_DEBUG 652 if (fdc_debug > 1) 653 printf("fdstrategy: b_blkno %d b_bcount %ld blkno %d cylin %ld\n", 654 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 655 #endif 656 657 /* Queue transfer on drive, activate drive and controller if idle. */ 658 s = splbio(); 659 disksort(&fd->sc_q, bp); 660 untimeout(fd_motor_off, fd); /* a good idea */ 661 if (!fd->sc_q.b_active) 662 fdstart(fd); 663 #ifdef DIAGNOSTIC 664 else { 665 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 666 if (fdc->sc_state == DEVIDLE) { 667 printf("fdstrategy: controller inactive\n"); 668 fdcstart(fdc); 669 } 670 } 671 #endif 672 splx(s); 673 return; 674 675 bad: 676 bp->b_flags |= B_ERROR; 677 done: 678 /* Toss transfer; we're done early. */ 679 biodone(bp); 680 } 681 682 void 683 fdstart(fd) 684 struct fd_softc *fd; 685 { 686 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 687 int active = fdc->sc_drives.tqh_first != 0; 688 689 /* Link into controller queue. */ 690 fd->sc_q.b_active = 1; 691 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 692 693 /* If controller not already active, start it. */ 694 if (!active) 695 fdcstart(fdc); 696 } 697 698 void 699 fdfinish(fd, bp) 700 struct fd_softc *fd; 701 struct buf *bp; 702 { 703 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 704 705 /* 706 * Move this drive to the end of the queue to give others a `fair' 707 * chance. We only force a switch if N operations are completed while 708 * another drive is waiting to be serviced, since there is a long motor 709 * startup delay whenever we switch. 710 */ 711 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 712 fd->sc_ops = 0; 713 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 714 if (bp->b_actf) { 715 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 716 } else 717 fd->sc_q.b_active = 0; 718 } 719 bp->b_resid = fd->sc_bcount; 720 fd->sc_skip = 0; 721 fd->sc_q.b_actf = bp->b_actf; 722 723 biodone(bp); 724 /* turn off motor 5s from now */ 725 timeout(fd_motor_off, fd, 5 * hz); 726 fdc->sc_state = DEVIDLE; 727 } 728 729 void 730 fdc_reset(fdc) 731 struct fdc_softc *fdc; 732 { 733 if (fdc->sc_flags & FDC_82077) { 734 *fdc->sc_reg_dor = FDO_MOEN(0); 735 } 736 737 *fdc->sc_reg_drs = DRS_RESET; 738 delay(10); 739 *fdc->sc_reg_drs = 0; 740 #ifdef FD_DEBUG 741 if (fdc_debug) 742 printf("fdc reset\n"); 743 #endif 744 } 745 746 void 747 fd_set_motor(fdc) 748 struct fdc_softc *fdc; 749 { 750 struct fd_softc *fd; 751 u_char status; 752 int n; 753 754 if (fdc->sc_flags & FDC_82077) { 755 status = FDO_FRST | FDO_FDMAEN; 756 if ((fd = fdc->sc_drives.tqh_first) != NULL) 757 status |= fd->sc_drive; 758 759 for (n = 0; n < 4; n++) 760 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 761 status |= FDO_MOEN(n); 762 *fdc->sc_reg_dor = status; 763 } else { 764 int on = 0; 765 766 for (n = 0; n < 4; n++) 767 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 768 on = 1; 769 if (on) { 770 auxregbisc(AUXIO_FDS, 0); 771 } else { 772 auxregbisc(0, AUXIO_FDS); 773 } 774 } 775 } 776 777 void 778 fd_motor_off(arg) 779 void *arg; 780 { 781 struct fd_softc *fd = arg; 782 int s; 783 784 s = splbio(); 785 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 786 fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent); 787 splx(s); 788 } 789 790 void 791 fd_motor_on(arg) 792 void *arg; 793 { 794 struct fd_softc *fd = arg; 795 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 796 int s; 797 798 s = splbio(); 799 fd->sc_flags &= ~FD_MOTOR_WAIT; 800 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 801 (void) fdcswintr(fdc); 802 splx(s); 803 } 804 805 int 806 fdcresult(fdc) 807 struct fdc_softc *fdc; 808 { 809 u_char i; 810 int j = 100000, 811 n = 0; 812 813 for (; j; j--) { 814 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 815 if (i == NE7_RQM) 816 return (fdc->sc_nstat = n); 817 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 818 if (n >= sizeof(fdc->sc_status)) { 819 log(LOG_ERR, "fdcresult: overrun\n"); 820 return -1; 821 } 822 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 823 } 824 } 825 log(LOG_ERR, "fdcresult: timeout\n"); 826 return (fdc->sc_nstat = -1); 827 } 828 829 int 830 out_fdc(fdc, x) 831 struct fdc_softc *fdc; 832 u_char x; 833 { 834 int i = 100000; 835 836 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 837 if (i <= 0) 838 return -1; 839 840 *fdc->sc_reg_fifo = x; 841 return 0; 842 } 843 844 int 845 fdopen(dev, flags, fmt, p) 846 dev_t dev; 847 int flags, fmt; 848 struct proc *p; 849 { 850 int unit, pmask; 851 struct fd_softc *fd; 852 struct fd_type *type; 853 854 unit = FDUNIT(dev); 855 if (unit >= fd_cd.cd_ndevs) 856 return ENXIO; 857 fd = fd_cd.cd_devs[unit]; 858 if (fd == 0) 859 return ENXIO; 860 type = fd_dev_to_type(fd, dev); 861 if (type == NULL) 862 return ENXIO; 863 864 if ((fd->sc_flags & FD_OPEN) != 0 && 865 fd->sc_type != type) 866 return EBUSY; 867 868 fd->sc_type = type; 869 fd->sc_cylin = -1; 870 fd->sc_flags |= FD_OPEN; 871 872 /* 873 * Only update the disklabel if we're not open anywhere else. 874 */ 875 if (fd->sc_dk.dk_openmask == 0) 876 fdgetdisklabel(dev); 877 878 pmask = (1 << DISKPART(dev)); 879 880 switch (fmt) { 881 case S_IFCHR: 882 fd->sc_dk.dk_copenmask |= pmask; 883 break; 884 885 case S_IFBLK: 886 fd->sc_dk.dk_bopenmask |= pmask; 887 break; 888 } 889 fd->sc_dk.dk_openmask = 890 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 891 892 return 0; 893 } 894 895 int 896 fdclose(dev, flags, fmt, p) 897 dev_t dev; 898 int flags, fmt; 899 struct proc *p; 900 { 901 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 902 int pmask = (1 << DISKPART(dev)); 903 904 fd->sc_flags &= ~FD_OPEN; 905 906 switch (fmt) { 907 case S_IFCHR: 908 fd->sc_dk.dk_copenmask &= ~pmask; 909 break; 910 911 case S_IFBLK: 912 fd->sc_dk.dk_bopenmask &= ~pmask; 913 break; 914 } 915 fd->sc_dk.dk_openmask = 916 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 917 918 return 0; 919 } 920 921 int 922 fdread(dev, uio, flag) 923 dev_t dev; 924 struct uio *uio; 925 int flag; 926 { 927 928 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 929 } 930 931 int 932 fdwrite(dev, uio, flag) 933 dev_t dev; 934 struct uio *uio; 935 int flag; 936 { 937 938 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 939 } 940 941 void 942 fdcstart(fdc) 943 struct fdc_softc *fdc; 944 { 945 946 #ifdef DIAGNOSTIC 947 /* only got here if controller's drive queue was inactive; should 948 be in idle state */ 949 if (fdc->sc_state != DEVIDLE) { 950 printf("fdcstart: not idle\n"); 951 return; 952 } 953 #endif 954 (void) fdcswintr(fdc); 955 } 956 957 void 958 fdcstatus(dv, n, s) 959 struct device *dv; 960 int n; 961 char *s; 962 { 963 struct fdc_softc *fdc = (void *)dv->dv_parent; 964 #if 0 965 /* 966 * A 82072 seems to return <invalid command> on 967 * gratuitous Sense Interrupt commands. 968 */ 969 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 970 out_fdc(fdc, NE7CMD_SENSEI); 971 (void) fdcresult(fdc); 972 n = 2; 973 } 974 #endif 975 976 /* Just print last status */ 977 n = fdc->sc_nstat; 978 979 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 980 981 switch (n) { 982 case 0: 983 printf("\n"); 984 break; 985 case 2: 986 printf(" (st0 %b cyl %d)\n", 987 fdc->sc_status[0], NE7_ST0BITS, 988 fdc->sc_status[1]); 989 break; 990 case 7: 991 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 992 fdc->sc_status[0], NE7_ST0BITS, 993 fdc->sc_status[1], NE7_ST1BITS, 994 fdc->sc_status[2], NE7_ST2BITS, 995 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 996 break; 997 #ifdef DIAGNOSTIC 998 default: 999 printf(" fdcstatus: weird size: %d\n", n); 1000 break; 1001 #endif 1002 } 1003 } 1004 1005 void 1006 fdctimeout(arg) 1007 void *arg; 1008 { 1009 struct fdc_softc *fdc = arg; 1010 struct fd_softc *fd = fdc->sc_drives.tqh_first; 1011 int s; 1012 1013 s = splbio(); 1014 fdcstatus(&fd->sc_dv, 0, "timeout"); 1015 1016 if (fd->sc_q.b_actf) 1017 fdc->sc_state++; 1018 else 1019 fdc->sc_state = DEVIDLE; 1020 1021 (void) fdcswintr(fdc); 1022 splx(s); 1023 } 1024 1025 void 1026 fdcpseudointr(arg) 1027 void *arg; 1028 { 1029 struct fdc_softc *fdc = arg; 1030 int s; 1031 1032 /* Just ensure it has the right spl. */ 1033 s = splbio(); 1034 (void) fdcswintr(fdc); 1035 splx(s); 1036 } 1037 1038 1039 #ifdef FDC_C_HANDLER 1040 /* 1041 * hardware interrupt entry point: must be converted to `fast' 1042 * (in-window) handler. 1043 */ 1044 int 1045 fdchwintr(fdc) 1046 struct fdc_softc *fdc; 1047 { 1048 struct buf *bp; 1049 int read; 1050 1051 switch (fdc->sc_istate) { 1052 case ISTATE_SENSEI: 1053 out_fdc(fdc, NE7CMD_SENSEI); 1054 fdcresult(fdc); 1055 fdc->sc_istate = ISTATE_IDLE; 1056 ienab_bis(IE_FDSOFT); 1057 return 1; 1058 case ISTATE_IDLE: 1059 case ISTATE_SPURIOUS: 1060 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 1061 fdcresult(fdc); 1062 fdc->sc_istate = ISTATE_SPURIOUS; 1063 printf("fdc: stray hard interrupt... "); 1064 ienab_bis(IE_FDSOFT); 1065 return 1; 1066 case ISTATE_DMA: 1067 break; 1068 default: 1069 printf("fdc: goofed ...\n"); 1070 return 1; 1071 } 1072 1073 read = bp->b_flags & B_READ; 1074 for (;;) { 1075 register int msr; 1076 1077 msr = *fdc->sc_reg_msr; 1078 1079 if ((msr & NE7_RQM) == 0) 1080 break; 1081 1082 if ((msr & NE7_NDM) == 0) { 1083 fdcresult(fdc); 1084 fdc->sc_istate = ISTATE_IDLE; 1085 ienab_bis(IE_FDSOFT); 1086 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 1087 break; 1088 } 1089 1090 if (msr & NE7_DIO) { 1091 #ifdef DIAGNOSTIC 1092 if (!read) 1093 printf("fdxfer: false read\n"); 1094 #endif 1095 *fdc->sc_data++ = *fdc->sc_reg_fifo; 1096 } else { 1097 #ifdef DIAGNOSTIC 1098 if (read) 1099 printf("fdxfer: false write\n"); 1100 #endif 1101 *fdc->sc_reg_fifo = *fdc->sc_data++; 1102 } 1103 if (--fdc->sc_tc == 0) { 1104 auxregbisc(AUXIO_FTC, 0); 1105 fdc->sc_istate = ISTATE_IDLE; 1106 delay(10); 1107 auxregbisc(0, AUXIO_FTC); 1108 fdcresult(fdc); 1109 ienab_bis(IE_FDSOFT); 1110 break; 1111 } 1112 } 1113 return 1; 1114 } 1115 #endif 1116 1117 int 1118 fdcswintr(fdc) 1119 struct fdc_softc *fdc; 1120 { 1121 #define st0 fdc->sc_status[0] 1122 #define st1 fdc->sc_status[1] 1123 #define cyl fdc->sc_status[1] 1124 #define OUT_FDC(fdc, c, s) \ 1125 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1126 1127 struct fd_softc *fd; 1128 struct buf *bp; 1129 int read, head, sec, nblks; 1130 struct fd_type *type; 1131 1132 1133 if (fdc->sc_istate != ISTATE_IDLE) { 1134 /* Trouble... */ 1135 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1136 fdc->sc_state, fdc->sc_istate); 1137 fdc->sc_istate = ISTATE_IDLE; 1138 if (fdc->sc_state == RESETCOMPLETE || 1139 fdc->sc_state == RESETTIMEDOUT) { 1140 panic("fdcintr: spurious interrupt can't be cleared"); 1141 } 1142 goto doreset; 1143 } 1144 1145 loop: 1146 /* Is there a drive for the controller to do a transfer with? */ 1147 fd = fdc->sc_drives.tqh_first; 1148 if (fd == NULL) { 1149 fdc->sc_state = DEVIDLE; 1150 return 0; 1151 } 1152 1153 /* Is there a transfer to this drive? If not, deactivate drive. */ 1154 bp = fd->sc_q.b_actf; 1155 if (bp == NULL) { 1156 fd->sc_ops = 0; 1157 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1158 fd->sc_q.b_active = 0; 1159 goto loop; 1160 } 1161 1162 switch (fdc->sc_state) { 1163 case DEVIDLE: 1164 fdc->sc_errors = 0; 1165 fd->sc_skip = 0; 1166 fd->sc_bcount = bp->b_bcount; 1167 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1168 untimeout(fd_motor_off, fd); 1169 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1170 fdc->sc_state = MOTORWAIT; 1171 return 1; 1172 } 1173 if ((fd->sc_flags & FD_MOTOR) == 0) { 1174 /* Turn on the motor, being careful about pairing. */ 1175 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1176 if (ofd && ofd->sc_flags & FD_MOTOR) { 1177 untimeout(fd_motor_off, ofd); 1178 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1179 } 1180 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1181 fd_set_motor(fdc); 1182 fdc->sc_state = MOTORWAIT; 1183 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1184 /* Allow .25s for motor to stabilize. */ 1185 timeout(fd_motor_on, fd, hz / 4); 1186 } else { 1187 fd->sc_flags &= ~FD_MOTOR_WAIT; 1188 goto loop; 1189 } 1190 return 1; 1191 } 1192 /* Make sure the right drive is selected. */ 1193 fd_set_motor(fdc); 1194 1195 /* fall through */ 1196 case DOSEEK: 1197 doseek: 1198 if (fdc->sc_flags & FDC_EIS) { 1199 fd->sc_cylin = bp->b_cylin; 1200 /* We use implied seek */ 1201 goto doio; 1202 } 1203 1204 if (fd->sc_cylin == bp->b_cylin) 1205 goto doio; 1206 1207 /* specify command */ 1208 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1209 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1210 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1211 1212 fdc->sc_istate = ISTATE_SENSEI; 1213 /* seek function */ 1214 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1215 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1216 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1217 1218 fd->sc_cylin = -1; 1219 fdc->sc_state = SEEKWAIT; 1220 fdc->sc_nstat = 0; 1221 1222 fd->sc_dk.dk_seek++; 1223 disk_busy(&fd->sc_dk); 1224 1225 timeout(fdctimeout, fdc, 4 * hz); 1226 return 1; 1227 1228 case DOIO: 1229 doio: 1230 type = fd->sc_type; 1231 sec = fd->sc_blkno % type->seccyl; 1232 nblks = type->seccyl - sec; 1233 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1234 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1235 fd->sc_nblks = nblks; 1236 fd->sc_nbytes = nblks * FDC_BSIZE; 1237 head = sec / type->sectrac; 1238 sec -= head * type->sectrac; 1239 #ifdef DIAGNOSTIC 1240 {int block; 1241 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1242 if (block != fd->sc_blkno) { 1243 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1244 #ifdef DDB 1245 Debugger(); 1246 #endif 1247 }} 1248 #endif 1249 read = bp->b_flags & B_READ; 1250 1251 /* Setup for pseudo DMA */ 1252 fdc->sc_data = bp->b_data + fd->sc_skip; 1253 fdc->sc_tc = fd->sc_nbytes; 1254 1255 *fdc->sc_reg_drs = type->rate; 1256 #ifdef FD_DEBUG 1257 if (fdc_debug > 1) 1258 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1259 read ? "read" : "write", fd->sc_drive, 1260 fd->sc_cylin, head, sec, nblks); 1261 #endif 1262 fdc->sc_state = IOCOMPLETE; 1263 fdc->sc_istate = ISTATE_DMA; 1264 fdc->sc_nstat = 0; 1265 if (read) 1266 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1267 else 1268 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1269 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1270 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1271 OUT_FDC(fdc, head, IOTIMEDOUT); 1272 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1273 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1274 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1275 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1276 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1277 1278 disk_busy(&fd->sc_dk); 1279 1280 /* allow 2 seconds for operation */ 1281 timeout(fdctimeout, fdc, 2 * hz); 1282 return 1; /* will return later */ 1283 1284 case SEEKWAIT: 1285 untimeout(fdctimeout, fdc); 1286 fdc->sc_state = SEEKCOMPLETE; 1287 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1288 /* allow 1/50 second for heads to settle */ 1289 timeout(fdcpseudointr, fdc, hz / 50); 1290 return 1; /* will return later */ 1291 } 1292 1293 case SEEKCOMPLETE: 1294 disk_unbusy(&fd->sc_dk, 0); /* no data on seek */ 1295 1296 /* Make sure seek really happened. */ 1297 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1298 cyl != bp->b_cylin * fd->sc_type->step) { 1299 #ifdef FD_DEBUG 1300 if (fdc_debug) 1301 fdcstatus(&fd->sc_dv, 2, "seek failed"); 1302 #endif 1303 fdcretry(fdc); 1304 goto loop; 1305 } 1306 fd->sc_cylin = bp->b_cylin; 1307 goto doio; 1308 1309 case IOTIMEDOUT: 1310 auxregbisc(AUXIO_FTC, 0); 1311 delay(10); 1312 auxregbisc(0, AUXIO_FTC); 1313 (void)fdcresult(fdc); 1314 case SEEKTIMEDOUT: 1315 case RECALTIMEDOUT: 1316 case RESETTIMEDOUT: 1317 fdcretry(fdc); 1318 goto loop; 1319 1320 case IOCOMPLETE: /* IO DONE, post-analyze */ 1321 untimeout(fdctimeout, fdc); 1322 1323 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid)); 1324 1325 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1326 #ifdef FD_DEBUG 1327 if (fdc_debug) { 1328 fdcstatus(&fd->sc_dv, 7, 1329 bp->b_flags & B_READ 1330 ? "read failed" : "write failed"); 1331 printf("blkno %d nblks %d tc %d\n", 1332 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1333 } 1334 #endif 1335 if (fdc->sc_nstat == 7 && 1336 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1337 1338 /* 1339 * Silently retry overruns if no other 1340 * error bit is set. Adjust threshold. 1341 */ 1342 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1343 if (thr < 15) { 1344 thr++; 1345 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1346 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1347 #ifdef FD_DEBUG 1348 if (fdc_debug) 1349 printf("fdc: %d -> threshold\n", thr); 1350 #endif 1351 fdconf(fdc); 1352 fdc->sc_overruns = 0; 1353 } 1354 if (++fdc->sc_overruns < 3) { 1355 fdc->sc_state = DOIO; 1356 goto loop; 1357 } 1358 } 1359 fdcretry(fdc); 1360 goto loop; 1361 } 1362 if (fdc->sc_errors) { 1363 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1364 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1365 printf("\n"); 1366 fdc->sc_errors = 0; 1367 } else { 1368 if (--fdc->sc_overruns < -20) { 1369 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1370 if (thr > 0) { 1371 thr--; 1372 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1373 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1374 #ifdef FD_DEBUG 1375 if (fdc_debug) 1376 printf("fdc: %d -> threshold\n", thr); 1377 #endif 1378 fdconf(fdc); 1379 } 1380 fdc->sc_overruns = 0; 1381 } 1382 } 1383 fd->sc_blkno += fd->sc_nblks; 1384 fd->sc_skip += fd->sc_nbytes; 1385 fd->sc_bcount -= fd->sc_nbytes; 1386 if (fd->sc_bcount > 0) { 1387 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1388 goto doseek; 1389 } 1390 fdfinish(fd, bp); 1391 goto loop; 1392 1393 case DORESET: 1394 doreset: 1395 /* try a reset, keep motor on */ 1396 fd_set_motor(fdc); 1397 delay(100); 1398 fdc_reset(fdc); 1399 fdc->sc_nstat = 0; 1400 fdc->sc_istate = ISTATE_SENSEI; 1401 fdc->sc_state = RESETCOMPLETE; 1402 timeout(fdctimeout, fdc, hz / 2); 1403 return 1; /* will return later */ 1404 1405 case RESETCOMPLETE: 1406 untimeout(fdctimeout, fdc); 1407 fdconf(fdc); 1408 1409 /* fall through */ 1410 case DORECAL: 1411 fdc->sc_state = RECALWAIT; 1412 fdc->sc_istate = ISTATE_SENSEI; 1413 fdc->sc_nstat = 0; 1414 /* recalibrate function */ 1415 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1416 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1417 timeout(fdctimeout, fdc, 5 * hz); 1418 return 1; /* will return later */ 1419 1420 case RECALWAIT: 1421 untimeout(fdctimeout, fdc); 1422 fdc->sc_state = RECALCOMPLETE; 1423 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1424 /* allow 1/30 second for heads to settle */ 1425 timeout(fdcpseudointr, fdc, hz / 30); 1426 return 1; /* will return later */ 1427 } 1428 1429 case RECALCOMPLETE: 1430 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1431 #ifdef FD_DEBUG 1432 if (fdc_debug) 1433 fdcstatus(&fd->sc_dv, 2, "recalibrate failed"); 1434 #endif 1435 fdcretry(fdc); 1436 goto loop; 1437 } 1438 fd->sc_cylin = 0; 1439 goto doseek; 1440 1441 case MOTORWAIT: 1442 if (fd->sc_flags & FD_MOTOR_WAIT) 1443 return 1; /* time's not up yet */ 1444 goto doseek; 1445 1446 default: 1447 fdcstatus(&fd->sc_dv, 0, "stray interrupt"); 1448 return 1; 1449 } 1450 #ifdef DIAGNOSTIC 1451 panic("fdcintr: impossible"); 1452 #endif 1453 #undef st0 1454 #undef st1 1455 #undef cyl 1456 } 1457 1458 void 1459 fdcretry(fdc) 1460 struct fdc_softc *fdc; 1461 { 1462 struct fd_softc *fd; 1463 struct buf *bp; 1464 1465 fd = fdc->sc_drives.tqh_first; 1466 bp = fd->sc_q.b_actf; 1467 1468 fdc->sc_overruns = 0; 1469 1470 switch (fdc->sc_errors) { 1471 case 0: 1472 /* try again */ 1473 fdc->sc_state = 1474 (fdc->sc_flags & FDC_EIS) ? DOIO : DOSEEK; 1475 break; 1476 1477 case 1: case 2: case 3: 1478 /* didn't work; try recalibrating */ 1479 fdc->sc_state = DORECAL; 1480 break; 1481 1482 case 4: 1483 /* still no go; reset the bastard */ 1484 fdc->sc_state = DORESET; 1485 break; 1486 1487 default: 1488 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1489 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1490 1491 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 1492 fdc->sc_status[0], NE7_ST0BITS, 1493 fdc->sc_status[1], NE7_ST1BITS, 1494 fdc->sc_status[2], NE7_ST2BITS, 1495 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1496 1497 bp->b_flags |= B_ERROR; 1498 bp->b_error = EIO; 1499 fdfinish(fd, bp); 1500 } 1501 fdc->sc_errors++; 1502 } 1503 1504 int 1505 fdsize(dev) 1506 dev_t dev; 1507 { 1508 1509 /* Swapping to floppies would not make sense. */ 1510 return -1; 1511 } 1512 1513 int 1514 fddump(dev, blkno, va, size) 1515 dev_t dev; 1516 daddr_t blkno; 1517 caddr_t va; 1518 size_t size; 1519 { 1520 1521 /* Not implemented. */ 1522 return EINVAL; 1523 } 1524 1525 int 1526 fdioctl(dev, cmd, addr, flag, p) 1527 dev_t dev; 1528 u_long cmd; 1529 caddr_t addr; 1530 int flag; 1531 struct proc *p; 1532 { 1533 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 1534 int error; 1535 1536 switch (cmd) { 1537 case DIOCGDINFO: 1538 *(struct disklabel *)addr = *(fd->sc_dk.dk_label); 1539 return 0; 1540 1541 case DIOCWLABEL: 1542 if ((flag & FWRITE) == 0) 1543 return EBADF; 1544 /* XXX do something */ 1545 return 0; 1546 1547 case DIOCWDINFO: 1548 if ((flag & FWRITE) == 0) 1549 return EBADF; 1550 1551 error = setdisklabel(fd->sc_dk.dk_label, 1552 (struct disklabel *)addr, 0, 1553 fd->sc_dk.dk_cpulabel); 1554 if (error) 1555 return error; 1556 1557 error = writedisklabel(dev, fdstrategy, 1558 fd->sc_dk.dk_label, 1559 fd->sc_dk.dk_cpulabel); 1560 return error; 1561 1562 case DIOCLOCK: 1563 /* 1564 * Nothing to do here, really. 1565 */ 1566 return 0; 1567 1568 case DIOCEJECT: 1569 fd_do_eject(); 1570 return 0; 1571 1572 #ifdef DEBUG 1573 case _IO('f', 100): 1574 { 1575 int i; 1576 struct fdc_softc *fdc = (struct fdc_softc *) 1577 fd->sc_dv.dv_parent; 1578 1579 out_fdc(fdc, NE7CMD_DUMPREG); 1580 fdcresult(fdc); 1581 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1582 for (i = 0; i < fdc->sc_nstat; i++) 1583 printf(" %x", fdc->sc_status[i]); 1584 printf(">\n"); 1585 } 1586 1587 return 0; 1588 case _IOW('f', 101, int): 1589 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg &= 1590 ~CFG_THRHLD_MASK; 1591 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |= 1592 (*(int *)addr & CFG_THRHLD_MASK); 1593 fdconf((struct fdc_softc *) fd->sc_dv.dv_parent); 1594 return 0; 1595 case _IO('f', 102): 1596 { 1597 int i; 1598 struct fdc_softc *fdc = (struct fdc_softc *) 1599 fd->sc_dv.dv_parent; 1600 out_fdc(fdc, NE7CMD_SENSEI); 1601 fdcresult(fdc); 1602 printf("sensei(%d regs): <", fdc->sc_nstat); 1603 for (i=0; i< fdc->sc_nstat; i++) 1604 printf(" 0x%x", fdc->sc_status[i]); 1605 } 1606 printf(">\n"); 1607 return 0; 1608 #endif 1609 default: 1610 return ENOTTY; 1611 } 1612 1613 #ifdef DIAGNOSTIC 1614 panic("fdioctl: impossible"); 1615 #endif 1616 } 1617 1618 void 1619 fdgetdisklabel(dev) 1620 dev_t dev; 1621 { 1622 int unit = FDUNIT(dev), i; 1623 struct fd_softc *fd = fd_cd.cd_devs[unit]; 1624 struct disklabel *lp = fd->sc_dk.dk_label; 1625 struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel; 1626 1627 bzero(lp, sizeof(struct disklabel)); 1628 bzero(lp, sizeof(struct cpu_disklabel)); 1629 1630 lp->d_type = DTYPE_FLOPPY; 1631 lp->d_secsize = FDC_BSIZE; 1632 lp->d_secpercyl = fd->sc_type->seccyl; 1633 lp->d_nsectors = fd->sc_type->sectrac; 1634 lp->d_ncylinders = fd->sc_type->tracks; 1635 lp->d_ntracks = fd->sc_type->heads; /* Go figure... */ 1636 lp->d_rpm = 3600; /* XXX like it matters... */ 1637 1638 strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename)); 1639 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 1640 lp->d_interleave = 1; 1641 1642 lp->d_partitions[RAW_PART].p_offset = 0; 1643 lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders; 1644 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1645 lp->d_npartitions = RAW_PART + 1; 1646 1647 lp->d_magic = DISKMAGIC; 1648 lp->d_magic2 = DISKMAGIC; 1649 lp->d_checksum = dkcksum(lp); 1650 1651 /* 1652 * Call the generic disklabel extraction routine. If there's 1653 * not a label there, fake it. 1654 */ 1655 if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) { 1656 strncpy(lp->d_packname, "default label", 1657 sizeof(lp->d_packname)); 1658 /* 1659 * Reset the partition info; it might have gotten 1660 * trashed in readdisklabel(). 1661 * 1662 * XXX Why do we have to do this? readdisklabel() 1663 * should be safe... 1664 */ 1665 for (i = 0; i < MAXPARTITIONS; ++i) { 1666 lp->d_partitions[i].p_offset = 0; 1667 if (i == RAW_PART) { 1668 lp->d_partitions[i].p_size = 1669 lp->d_secpercyl * lp->d_ncylinders; 1670 lp->d_partitions[i].p_fstype = FS_BSDFFS; 1671 } else { 1672 lp->d_partitions[i].p_size = 0; 1673 lp->d_partitions[i].p_fstype = FS_UNUSED; 1674 } 1675 } 1676 lp->d_npartitions = RAW_PART + 1; 1677 } 1678 } 1679 1680 void 1681 fd_do_eject() 1682 { 1683 1684 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1685 delay(10); 1686 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1687 } 1688 1689 /* ARGSUSED */ 1690 void 1691 fd_mountroot_hook(dev) 1692 struct device *dev; 1693 { 1694 int c; 1695 1696 fd_do_eject(); 1697 printf("Insert filesystem floppy and press return."); 1698 for (;;) { 1699 c = cngetc(); 1700 if ((c == '\r') || (c == '\n')) { 1701 printf("\n"); 1702 return; 1703 } 1704 } 1705 } 1706
Indexes created Fri Oct 03 02:09:57 GMT 2025