fd.c revision 1.31
1 /* $NetBSD: fd.c,v 1.31 1996/04/10 20:46:05 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/cpu.h> 58 #include <sys/conf.h> 59 60 #include <dev/cons.h> 61 62 #include <machine/cpu.h> 63 #include <machine/autoconf.h> 64 #include <machine/conf.h> 65 66 #include <sparc/sparc/auxreg.h> 67 #include <sparc/dev/fdreg.h> 68 #include <sparc/dev/fdvar.h> 69 70 #define FDUNIT(dev) (minor(dev) / 8) 71 #define FDTYPE(dev) (minor(dev) % 8) 72 73 #define b_cylin b_resid 74 75 #define FD_DEBUG 76 #ifdef FD_DEBUG 77 int fdc_debug = 0; 78 #endif 79 80 enum fdc_state { 81 DEVIDLE = 0, 82 MOTORWAIT, 83 DOSEEK, 84 SEEKWAIT, 85 SEEKTIMEDOUT, 86 SEEKCOMPLETE, 87 DOIO, 88 IOCOMPLETE, 89 IOTIMEDOUT, 90 DORESET, 91 RESETCOMPLETE, 92 RESETTIMEDOUT, 93 DORECAL, 94 RECALWAIT, 95 RECALTIMEDOUT, 96 RECALCOMPLETE, 97 }; 98 99 /* software state, per controller */ 100 struct fdc_softc { 101 struct device sc_dev; /* boilerplate */ 102 struct intrhand sc_sih; 103 struct intrhand sc_hih; 104 caddr_t sc_reg; 105 struct fd_softc *sc_fd[4]; /* pointers to children */ 106 TAILQ_HEAD(drivehead, fd_softc) sc_drives; 107 enum fdc_state sc_state; 108 int sc_flags; 109 #define FDC_82077 0x01 110 #define FDC_NEEDHEADSETTLE 0x02 111 #define FDC_EIS 0x04 112 int sc_errors; /* number of retries so far */ 113 int sc_overruns; /* number of DMA overruns */ 114 int sc_cfg; /* current configuration */ 115 struct fdcio sc_io; 116 #define sc_reg_msr sc_io.fdcio_reg_msr 117 #define sc_reg_fifo sc_io.fdcio_reg_fifo 118 #define sc_reg_dor sc_io.fdcio_reg_dor 119 #define sc_reg_drs sc_io.fdcio_reg_msr 120 #define sc_istate sc_io.fdcio_istate 121 #define sc_data sc_io.fdcio_data 122 #define sc_tc sc_io.fdcio_tc 123 #define sc_nstat sc_io.fdcio_nstat 124 #define sc_status sc_io.fdcio_status 125 #define sc_intrcnt sc_io.fdcio_intrcnt 126 }; 127 128 #ifndef FDC_C_HANDLER 129 extern struct fdcio *fdciop; 130 #endif 131 132 /* controller driver configuration */ 133 int fdcmatch __P((struct device *, void *, void *)); 134 void fdcattach __P((struct device *, struct device *, void *)); 135 136 struct cfattach fdc_ca = { 137 sizeof(struct fdc_softc), fdcmatch, fdcattach 138 }; 139 140 struct cfdriver fdc_cd = { 141 NULL, "fdc", DV_DULL 142 }; 143 144 __inline struct fd_type *fd_dev_to_type __P((struct fd_softc *, dev_t)); 145 146 /* 147 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 148 * we tell them apart. 149 */ 150 struct fd_type { 151 int sectrac; /* sectors per track */ 152 int heads; /* number of heads */ 153 int seccyl; /* sectors per cylinder */ 154 int secsize; /* size code for sectors */ 155 int datalen; /* data len when secsize = 0 */ 156 int steprate; /* step rate and head unload time */ 157 int gap1; /* gap len between sectors */ 158 int gap2; /* formatting gap */ 159 int tracks; /* total num of tracks */ 160 int size; /* size of disk in sectors */ 161 int step; /* steps per cylinder */ 162 int rate; /* transfer speed code */ 163 char *name; 164 }; 165 166 /* The order of entries in the following table is important -- BEWARE! */ 167 struct fd_type fd_types[] = { 168 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */ 169 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,"1.2MB" }, /* 1.2 MB AT-diskettes */ 170 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,"360KB/AT" }, /* 360kB in 1.2MB drive */ 171 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,"360KB/PC" }, /* 360kB PC diskettes */ 172 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,"720KB" }, /* 3.5" 720kB diskette */ 173 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,"720KB/x" }, /* 720kB in 1.2MB drive */ 174 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,"360KB/x" }, /* 360kB in 720kB drive */ 175 }; 176 177 /* software state, per disk (with up to 4 disks per ctlr) */ 178 struct fd_softc { 179 struct device sc_dv; /* generic device info */ 180 struct disk sc_dk; /* generic disk info */ 181 182 struct fd_type *sc_deftype; /* default type descriptor */ 183 struct fd_type *sc_type; /* current type descriptor */ 184 185 daddr_t sc_blkno; /* starting block number */ 186 int sc_bcount; /* byte count left */ 187 int sc_skip; /* bytes already transferred */ 188 int sc_nblks; /* number of blocks currently tranferring */ 189 int sc_nbytes; /* number of bytes currently tranferring */ 190 191 int sc_drive; /* physical unit number */ 192 int sc_flags; 193 #define FD_OPEN 0x01 /* it's open */ 194 #define FD_MOTOR 0x02 /* motor should be on */ 195 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 196 int sc_cylin; /* where we think the head is */ 197 198 void *sc_sdhook; /* shutdownhook cookie */ 199 200 TAILQ_ENTRY(fd_softc) sc_drivechain; 201 int sc_ops; /* I/O ops since last switch */ 202 struct buf sc_q; /* head of buf chain */ 203 }; 204 205 /* floppy driver configuration */ 206 int fdmatch __P((struct device *, void *, void *)); 207 void fdattach __P((struct device *, struct device *, void *)); 208 209 struct cfattach fd_ca = { 210 sizeof(struct fd_softc), fdmatch, fdattach 211 }; 212 213 struct cfdriver fd_cd = { 214 NULL, "fd", DV_DISK 215 }; 216 217 void fdgetdisklabel __P((dev_t)); 218 int fd_get_parms __P((struct fd_softc *)); 219 void fdstrategy __P((struct buf *)); 220 void fdstart __P((struct fd_softc *)); 221 int fdprint __P((void *, char *)); 222 223 struct dkdriver fddkdriver = { fdstrategy }; 224 225 struct fd_type *fd_nvtotype __P((char *, int, int)); 226 void fd_set_motor __P((struct fdc_softc *fdc)); 227 void fd_motor_off __P((void *arg)); 228 void fd_motor_on __P((void *arg)); 229 int fdcresult __P((struct fdc_softc *fdc)); 230 int out_fdc __P((struct fdc_softc *fdc, u_char x)); 231 void fdcstart __P((struct fdc_softc *fdc)); 232 void fdcstatus __P((struct device *dv, int n, char *s)); 233 void fdc_reset __P((struct fdc_softc *fdc)); 234 void fdctimeout __P((void *arg)); 235 void fdcpseudointr __P((void *arg)); 236 #ifdef FDC_C_HANDLER 237 int fdchwintr __P((struct fdc_softc *)); 238 #else 239 void fdchwintr __P((void)); 240 #endif 241 int fdcswintr __P((struct fdc_softc *)); 242 void fdcretry __P((struct fdc_softc *fdc)); 243 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 244 void fd_do_eject __P((void)); 245 void fd_mountroot_hook __P((struct device *)); 246 static void fdconf __P((struct fdc_softc *)); 247 248 #if PIL_FDSOFT == 4 249 #define IE_FDSOFT IE_L4 250 #else 251 #error 4 252 #endif 253 254 #define OBP_FDNAME (CPU_ISSUN4M ? "SUNW,fdtwo" : "fd") 255 256 int 257 fdcmatch(parent, match, aux) 258 struct device *parent; 259 void *match, *aux; 260 { 261 register struct confargs *ca = aux; 262 register struct romaux *ra = &ca->ca_ra; 263 264 /* 265 * Floppy doesn't exist on sun4. 266 */ 267 if (CPU_ISSUN4) 268 return (0); 269 270 /* 271 * Floppy controller is on mainbus on sun4c. 272 */ 273 if ((CPU_ISSUN4C) && (ca->ca_bustype != BUS_MAIN)) 274 return (0); 275 276 /* 277 * Floppy controller is on obio on sun4m. 278 */ 279 if ((CPU_ISSUN4M) && (ca->ca_bustype != BUS_OBIO)) 280 return (0); 281 282 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 283 if (strcmp(OBP_FDNAME, ra->ra_name)) 284 return (0); 285 286 if (ca->ca_ra.ra_vaddr && 287 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 288 return (0); 289 } 290 291 return (1); 292 } 293 294 /* 295 * Arguments passed between fdcattach and fdprobe. 296 */ 297 struct fdc_attach_args { 298 int fa_drive; 299 struct bootpath *fa_bootpath; 300 struct fd_type *fa_deftype; 301 }; 302 303 /* 304 * Print the location of a disk drive (called just before attaching the 305 * the drive). If `fdc' is not NULL, the drive was found but was not 306 * in the system config file; print the drive name as well. 307 * Return QUIET (config_find ignores this if the device was configured) to 308 * avoid printing `fdN not configured' messages. 309 */ 310 int 311 fdprint(aux, fdc) 312 void *aux; 313 char *fdc; 314 { 315 register struct fdc_attach_args *fa = aux; 316 317 if (!fdc) 318 printf(" drive %d", fa->fa_drive); 319 return QUIET; 320 } 321 322 static void 323 fdconf(fdc) 324 struct fdc_softc *fdc; 325 { 326 int vroom; 327 328 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 329 return; 330 331 /* 332 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 333 * the PROM thinks is appropriate. 334 */ 335 if ((vroom = fdc->sc_status[7]) == 0) 336 vroom = 0x64; 337 338 /* Configure controller to use FIFO and Implied Seek */ 339 out_fdc(fdc, NE7CMD_CFG); 340 out_fdc(fdc, vroom); 341 out_fdc(fdc, fdc->sc_cfg); 342 out_fdc(fdc, 0); /* PRETRK */ 343 /* No result phase */ 344 } 345 346 void 347 fdcattach(parent, self, aux) 348 struct device *parent, *self; 349 void *aux; 350 { 351 register struct confargs *ca = aux; 352 struct fdc_softc *fdc = (void *)self; 353 struct fdc_attach_args fa; 354 struct bootpath *bp; 355 int pri; 356 char code; 357 358 if (ca->ca_ra.ra_vaddr) 359 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 360 else 361 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_reg, 0, 362 ca->ca_ra.ra_len, 363 ca->ca_bustype); 364 365 fdc->sc_state = DEVIDLE; 366 fdc->sc_istate = ISTATE_IDLE; 367 fdc->sc_flags |= FDC_EIS; 368 TAILQ_INIT(&fdc->sc_drives); 369 370 pri = ca->ca_ra.ra_intr[0].int_pri; 371 #ifdef FDC_C_HANDLER 372 fdc->sc_hih.ih_fun = (void *)fdchwintr; 373 fdc->sc_hih.ih_arg = fdc; 374 intr_establish(pri, &fdc->sc_hih); 375 #else 376 fdciop = &fdc->sc_io; 377 intr_fasttrap(pri, fdchwintr); 378 #endif 379 fdc->sc_sih.ih_fun = (void *)fdcswintr; 380 fdc->sc_sih.ih_arg = fdc; 381 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 382 383 /* Assume a 82077 */ 384 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 385 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 386 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 387 388 code = '7'; 389 if (*fdc->sc_reg_dor == NE7_RQM) { 390 /* 391 * This hack from Chris Torek: apparently DOR really 392 * addresses MSR/DRS on a 82072. 393 * We used to rely on the VERSION command to tell the 394 * difference (which did not work). 395 */ 396 *fdc->sc_reg_dor = FDC_250KBPS; 397 if (*fdc->sc_reg_dor == NE7_RQM) 398 code = '2'; 399 } 400 if (code == '7') { 401 fdc->sc_flags |= FDC_82077; 402 } else { 403 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 404 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 405 fdc->sc_reg_dor = 0; 406 } 407 408 #ifdef FD_DEBUG 409 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 410 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 411 if (fdc_debug) 412 printf("[version cmd]"); 413 } 414 #endif 415 416 /* 417 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 418 * Note: CFG_EFIFO is active-low, initial threshold value: 8 419 */ 420 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 421 fdconf(fdc); 422 423 if (fdc->sc_flags & FDC_82077) { 424 /* Lock configuration across soft resets. */ 425 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 426 if (fdcresult(fdc) != 1) 427 printf(" CFGLOCK: unexpected response"); 428 } 429 430 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 431 432 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 433 434 /* 435 * Controller and drives are represented by one and the same 436 * Openprom node, so we can as well check for the floppy boots here. 437 */ 438 fa.fa_bootpath = 0; 439 if ((bp = ca->ca_ra.ra_bp) && strcmp(bp->name, OBP_FDNAME) == 0) { 440 /* 441 * WOAH THERE! It looks like we can get the bootpath 442 * in several different formats!! The faked 443 * bootpath (and some v2?) looks like /fd@0,0 444 * but the real bootpath on some v2 OpenPROM 445 * systems looks like /fd0. In the case of 446 * a floppy controller on obio (such as on the sun4m), 447 * we use "slot, offset" to determine if this is the 448 * right one. --thorpej 449 */ 450 switch (ca->ca_bustype) { 451 case BUS_MAIN: 452 if (((bp->val[0] == 0) && /* /fd@0,0 */ 453 (bp->val[1] == 0)) || 454 ((bp->val[0] == -1) && /* /fd0 */ 455 (bp->val[1] == 0))) 456 fa.fa_bootpath = bp; 457 break; 458 459 case BUS_OBIO: 460 /* /obio0/SUNW,fdtwo@0,700000 */ 461 if ((bp->val[0] == ca->ca_slot) && 462 (bp->val[1] == ca->ca_offset)) 463 fa.fa_bootpath = bp; 464 break; 465 } 466 467 } 468 469 /* physical limit: four drives per controller. */ 470 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 471 fa.fa_deftype = NULL; /* unknown */ 472 fa.fa_deftype = &fd_types[0]; /* XXX */ 473 (void)config_found(self, (void *)&fa, fdprint); 474 } 475 476 bootpath_store(1, NULL); 477 } 478 479 int 480 fdmatch(parent, match, aux) 481 struct device *parent; 482 void *match, *aux; 483 { 484 struct fdc_softc *fdc = (void *)parent; 485 struct fdc_attach_args *fa = aux; 486 int drive = fa->fa_drive; 487 int n; 488 489 if (drive > 0) 490 /* XXX - for now, punt > 1 drives */ 491 return 0; 492 493 if (fdc->sc_flags & FDC_82077) { 494 /* select drive and turn on motor */ 495 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 496 /* wait for motor to spin up */ 497 delay(250000); 498 } else { 499 auxregbisc(AUXIO_FDS, 0); 500 } 501 fdc->sc_nstat = 0; 502 out_fdc(fdc, NE7CMD_RECAL); 503 out_fdc(fdc, drive); 504 /* wait for recalibrate */ 505 for (n = 0; n < 100000; n++) { 506 delay(10); 507 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 508 /* wait a bit longer till device *really* is ready */ 509 delay(100000); 510 if (out_fdc(fdc, NE7CMD_SENSEI)) 511 break; 512 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 513 /* 514 * Got `invalid command'; we interpret it 515 * to mean that the re-calibrate hasn't in 516 * fact finished yet 517 */ 518 continue; 519 break; 520 } 521 } 522 n = fdc->sc_nstat; 523 #ifdef FD_DEBUG 524 if (fdc_debug) { 525 int i; 526 printf("fdprobe: %d stati:", n); 527 for (i = 0; i < n; i++) 528 printf(" %x", fdc->sc_status[i]); 529 printf("\n"); 530 } 531 #endif 532 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 533 return 0; 534 /* turn off motor */ 535 if (fdc->sc_flags & FDC_82077) { 536 /* select drive and turn on motor */ 537 *fdc->sc_reg_dor = FDO_FRST; 538 } else { 539 auxregbisc(0, AUXIO_FDS); 540 } 541 542 return 1; 543 } 544 545 /* 546 * Controller is working, and drive responded. Attach it. 547 */ 548 void 549 fdattach(parent, self, aux) 550 struct device *parent, *self; 551 void *aux; 552 { 553 struct fdc_softc *fdc = (void *)parent; 554 struct fd_softc *fd = (void *)self; 555 struct fdc_attach_args *fa = aux; 556 struct fd_type *type = fa->fa_deftype; 557 int drive = fa->fa_drive; 558 559 /* XXX Allow `flags' to override device type? */ 560 561 if (type) 562 printf(": %s %d cyl, %d head, %d sec\n", type->name, 563 type->tracks, type->heads, type->sectrac); 564 else 565 printf(": density unknown\n"); 566 567 fd->sc_cylin = -1; 568 fd->sc_drive = drive; 569 fd->sc_deftype = type; 570 fdc->sc_fd[drive] = fd; 571 572 /* 573 * Initialize and attach the disk structure. 574 */ 575 fd->sc_dk.dk_name = fd->sc_dv.dv_xname; 576 fd->sc_dk.dk_driver = &fddkdriver; 577 disk_attach(&fd->sc_dk); 578 579 /* 580 * We're told if we're the boot device in fdcattach(). 581 */ 582 if (fa->fa_bootpath) 583 fa->fa_bootpath->dev = &fd->sc_dv; 584 585 /* 586 * Establish a mountroot_hook anyway in case we booted 587 * with RB_ASKNAME and get selected as the boot device. 588 */ 589 mountroot_hook_establish(fd_mountroot_hook, &fd->sc_dv); 590 591 /* Make sure the drive motor gets turned off at shutdown time. */ 592 fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd); 593 594 /* XXX Need to do some more fiddling with sc_dk. */ 595 dk_establish(&fd->sc_dk, &fd->sc_dv); 596 } 597 598 __inline struct fd_type * 599 fd_dev_to_type(fd, dev) 600 struct fd_softc *fd; 601 dev_t dev; 602 { 603 int type = FDTYPE(dev); 604 605 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 606 return NULL; 607 return type ? &fd_types[type - 1] : fd->sc_deftype; 608 } 609 610 void 611 fdstrategy(bp) 612 register struct buf *bp; /* IO operation to perform */ 613 { 614 struct fd_softc *fd; 615 int unit = FDUNIT(bp->b_dev); 616 int sz; 617 int s; 618 619 /* Valid unit, controller, and request? */ 620 if (unit >= fd_cd.cd_ndevs || 621 (fd = fd_cd.cd_devs[unit]) == 0 || 622 bp->b_blkno < 0 || 623 (bp->b_bcount % FDC_BSIZE) != 0) { 624 bp->b_error = EINVAL; 625 goto bad; 626 } 627 628 /* If it's a null transfer, return immediately. */ 629 if (bp->b_bcount == 0) 630 goto done; 631 632 sz = howmany(bp->b_bcount, FDC_BSIZE); 633 634 if (bp->b_blkno + sz > fd->sc_type->size) { 635 sz = fd->sc_type->size - bp->b_blkno; 636 if (sz == 0) { 637 /* If exactly at end of disk, return EOF. */ 638 bp->b_resid = bp->b_bcount; 639 goto done; 640 } 641 if (sz < 0) { 642 /* If past end of disk, return EINVAL. */ 643 bp->b_error = EINVAL; 644 goto bad; 645 } 646 /* Otherwise, truncate request. */ 647 bp->b_bcount = sz << DEV_BSHIFT; 648 } 649 650 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 651 652 #ifdef FD_DEBUG 653 if (fdc_debug > 1) 654 printf("fdstrategy: b_blkno %d b_bcount %ld blkno %d cylin %ld\n", 655 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 656 #endif 657 658 /* Queue transfer on drive, activate drive and controller if idle. */ 659 s = splbio(); 660 disksort(&fd->sc_q, bp); 661 untimeout(fd_motor_off, fd); /* a good idea */ 662 if (!fd->sc_q.b_active) 663 fdstart(fd); 664 #ifdef DIAGNOSTIC 665 else { 666 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 667 if (fdc->sc_state == DEVIDLE) { 668 printf("fdstrategy: controller inactive\n"); 669 fdcstart(fdc); 670 } 671 } 672 #endif 673 splx(s); 674 return; 675 676 bad: 677 bp->b_flags |= B_ERROR; 678 done: 679 /* Toss transfer; we're done early. */ 680 biodone(bp); 681 } 682 683 void 684 fdstart(fd) 685 struct fd_softc *fd; 686 { 687 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 688 int active = fdc->sc_drives.tqh_first != 0; 689 690 /* Link into controller queue. */ 691 fd->sc_q.b_active = 1; 692 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 693 694 /* If controller not already active, start it. */ 695 if (!active) 696 fdcstart(fdc); 697 } 698 699 void 700 fdfinish(fd, bp) 701 struct fd_softc *fd; 702 struct buf *bp; 703 { 704 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 705 706 /* 707 * Move this drive to the end of the queue to give others a `fair' 708 * chance. We only force a switch if N operations are completed while 709 * another drive is waiting to be serviced, since there is a long motor 710 * startup delay whenever we switch. 711 */ 712 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 713 fd->sc_ops = 0; 714 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 715 if (bp->b_actf) { 716 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 717 } else 718 fd->sc_q.b_active = 0; 719 } 720 bp->b_resid = fd->sc_bcount; 721 fd->sc_skip = 0; 722 fd->sc_q.b_actf = bp->b_actf; 723 724 biodone(bp); 725 /* turn off motor 5s from now */ 726 timeout(fd_motor_off, fd, 5 * hz); 727 fdc->sc_state = DEVIDLE; 728 } 729 730 void 731 fdc_reset(fdc) 732 struct fdc_softc *fdc; 733 { 734 if (fdc->sc_flags & FDC_82077) { 735 *fdc->sc_reg_dor = FDO_MOEN(0); 736 } 737 738 *fdc->sc_reg_drs = DRS_RESET; 739 delay(10); 740 *fdc->sc_reg_drs = 0; 741 #ifdef FD_DEBUG 742 if (fdc_debug) 743 printf("fdc reset\n"); 744 #endif 745 } 746 747 void 748 fd_set_motor(fdc) 749 struct fdc_softc *fdc; 750 { 751 struct fd_softc *fd; 752 u_char status; 753 int n; 754 755 if (fdc->sc_flags & FDC_82077) { 756 status = FDO_FRST | FDO_FDMAEN; 757 if ((fd = fdc->sc_drives.tqh_first) != NULL) 758 status |= fd->sc_drive; 759 760 for (n = 0; n < 4; n++) 761 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 762 status |= FDO_MOEN(n); 763 *fdc->sc_reg_dor = status; 764 } else { 765 int on = 0; 766 767 for (n = 0; n < 4; n++) 768 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 769 on = 1; 770 if (on) { 771 auxregbisc(AUXIO_FDS, 0); 772 } else { 773 auxregbisc(0, AUXIO_FDS); 774 } 775 } 776 } 777 778 void 779 fd_motor_off(arg) 780 void *arg; 781 { 782 struct fd_softc *fd = arg; 783 int s; 784 785 s = splbio(); 786 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 787 fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent); 788 splx(s); 789 } 790 791 void 792 fd_motor_on(arg) 793 void *arg; 794 { 795 struct fd_softc *fd = arg; 796 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 797 int s; 798 799 s = splbio(); 800 fd->sc_flags &= ~FD_MOTOR_WAIT; 801 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 802 (void) fdcswintr(fdc); 803 splx(s); 804 } 805 806 int 807 fdcresult(fdc) 808 struct fdc_softc *fdc; 809 { 810 u_char i; 811 int j = 100000, 812 n = 0; 813 814 for (; j; j--) { 815 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 816 if (i == NE7_RQM) 817 return (fdc->sc_nstat = n); 818 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 819 if (n >= sizeof(fdc->sc_status)) { 820 log(LOG_ERR, "fdcresult: overrun\n"); 821 return -1; 822 } 823 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 824 } 825 } 826 log(LOG_ERR, "fdcresult: timeout\n"); 827 return (fdc->sc_nstat = -1); 828 } 829 830 int 831 out_fdc(fdc, x) 832 struct fdc_softc *fdc; 833 u_char x; 834 { 835 int i = 100000; 836 837 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 838 if (i <= 0) 839 return -1; 840 841 *fdc->sc_reg_fifo = x; 842 return 0; 843 } 844 845 int 846 fdopen(dev, flags, fmt, p) 847 dev_t dev; 848 int flags, fmt; 849 struct proc *p; 850 { 851 int unit, pmask; 852 struct fd_softc *fd; 853 struct fd_type *type; 854 855 unit = FDUNIT(dev); 856 if (unit >= fd_cd.cd_ndevs) 857 return ENXIO; 858 fd = fd_cd.cd_devs[unit]; 859 if (fd == 0) 860 return ENXIO; 861 type = fd_dev_to_type(fd, dev); 862 if (type == NULL) 863 return ENXIO; 864 865 if ((fd->sc_flags & FD_OPEN) != 0 && 866 fd->sc_type != type) 867 return EBUSY; 868 869 fd->sc_type = type; 870 fd->sc_cylin = -1; 871 fd->sc_flags |= FD_OPEN; 872 873 /* 874 * Only update the disklabel if we're not open anywhere else. 875 */ 876 if (fd->sc_dk.dk_openmask == 0) 877 fdgetdisklabel(dev); 878 879 pmask = (1 << DISKPART(dev)); 880 881 switch (fmt) { 882 case S_IFCHR: 883 fd->sc_dk.dk_copenmask |= pmask; 884 break; 885 886 case S_IFBLK: 887 fd->sc_dk.dk_bopenmask |= pmask; 888 break; 889 } 890 fd->sc_dk.dk_openmask = 891 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 892 893 return 0; 894 } 895 896 int 897 fdclose(dev, flags, fmt, p) 898 dev_t dev; 899 int flags, fmt; 900 struct proc *p; 901 { 902 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 903 int pmask = (1 << DISKPART(dev)); 904 905 fd->sc_flags &= ~FD_OPEN; 906 907 switch (fmt) { 908 case S_IFCHR: 909 fd->sc_dk.dk_copenmask &= ~pmask; 910 break; 911 912 case S_IFBLK: 913 fd->sc_dk.dk_bopenmask &= ~pmask; 914 break; 915 } 916 fd->sc_dk.dk_openmask = 917 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 918 919 return 0; 920 } 921 922 int 923 fdread(dev, uio, flag) 924 dev_t dev; 925 struct uio *uio; 926 int flag; 927 { 928 929 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 930 } 931 932 int 933 fdwrite(dev, uio, flag) 934 dev_t dev; 935 struct uio *uio; 936 int flag; 937 { 938 939 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 940 } 941 942 void 943 fdcstart(fdc) 944 struct fdc_softc *fdc; 945 { 946 947 #ifdef DIAGNOSTIC 948 /* only got here if controller's drive queue was inactive; should 949 be in idle state */ 950 if (fdc->sc_state != DEVIDLE) { 951 printf("fdcstart: not idle\n"); 952 return; 953 } 954 #endif 955 (void) fdcswintr(fdc); 956 } 957 958 void 959 fdcstatus(dv, n, s) 960 struct device *dv; 961 int n; 962 char *s; 963 { 964 struct fdc_softc *fdc = (void *)dv->dv_parent; 965 #if 0 966 /* 967 * A 82072 seems to return <invalid command> on 968 * gratuitous Sense Interrupt commands. 969 */ 970 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 971 out_fdc(fdc, NE7CMD_SENSEI); 972 (void) fdcresult(fdc); 973 n = 2; 974 } 975 #endif 976 977 /* Just print last status */ 978 n = fdc->sc_nstat; 979 980 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 981 982 switch (n) { 983 case 0: 984 printf("\n"); 985 break; 986 case 2: 987 printf(" (st0 %b cyl %d)\n", 988 fdc->sc_status[0], NE7_ST0BITS, 989 fdc->sc_status[1]); 990 break; 991 case 7: 992 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 993 fdc->sc_status[0], NE7_ST0BITS, 994 fdc->sc_status[1], NE7_ST1BITS, 995 fdc->sc_status[2], NE7_ST2BITS, 996 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 997 break; 998 #ifdef DIAGNOSTIC 999 default: 1000 printf(" fdcstatus: weird size: %d\n", n); 1001 break; 1002 #endif 1003 } 1004 } 1005 1006 void 1007 fdctimeout(arg) 1008 void *arg; 1009 { 1010 struct fdc_softc *fdc = arg; 1011 struct fd_softc *fd = fdc->sc_drives.tqh_first; 1012 int s; 1013 1014 s = splbio(); 1015 fdcstatus(&fd->sc_dv, 0, "timeout"); 1016 1017 if (fd->sc_q.b_actf) 1018 fdc->sc_state++; 1019 else 1020 fdc->sc_state = DEVIDLE; 1021 1022 (void) fdcswintr(fdc); 1023 splx(s); 1024 } 1025 1026 void 1027 fdcpseudointr(arg) 1028 void *arg; 1029 { 1030 struct fdc_softc *fdc = arg; 1031 int s; 1032 1033 /* Just ensure it has the right spl. */ 1034 s = splbio(); 1035 (void) fdcswintr(fdc); 1036 splx(s); 1037 } 1038 1039 1040 #ifdef FDC_C_HANDLER 1041 /* 1042 * hardware interrupt entry point: must be converted to `fast' 1043 * (in-window) handler. 1044 */ 1045 int 1046 fdchwintr(fdc) 1047 struct fdc_softc *fdc; 1048 { 1049 struct buf *bp; 1050 int read; 1051 1052 switch (fdc->sc_istate) { 1053 case ISTATE_SENSEI: 1054 out_fdc(fdc, NE7CMD_SENSEI); 1055 fdcresult(fdc); 1056 fdc->sc_istate = ISTATE_IDLE; 1057 ienab_bis(IE_FDSOFT); 1058 return 1; 1059 case ISTATE_IDLE: 1060 case ISTATE_SPURIOUS: 1061 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 1062 fdcresult(fdc); 1063 fdc->sc_istate = ISTATE_SPURIOUS; 1064 printf("fdc: stray hard interrupt... "); 1065 ienab_bis(IE_FDSOFT); 1066 return 1; 1067 case ISTATE_DMA: 1068 break; 1069 default: 1070 printf("fdc: goofed ...\n"); 1071 return 1; 1072 } 1073 1074 read = bp->b_flags & B_READ; 1075 for (;;) { 1076 register int msr; 1077 1078 msr = *fdc->sc_reg_msr; 1079 1080 if ((msr & NE7_RQM) == 0) 1081 break; 1082 1083 if ((msr & NE7_NDM) == 0) { 1084 fdcresult(fdc); 1085 fdc->sc_istate = ISTATE_IDLE; 1086 ienab_bis(IE_FDSOFT); 1087 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 1088 break; 1089 } 1090 1091 if (msr & NE7_DIO) { 1092 #ifdef DIAGNOSTIC 1093 if (!read) 1094 printf("fdxfer: false read\n"); 1095 #endif 1096 *fdc->sc_data++ = *fdc->sc_reg_fifo; 1097 } else { 1098 #ifdef DIAGNOSTIC 1099 if (read) 1100 printf("fdxfer: false write\n"); 1101 #endif 1102 *fdc->sc_reg_fifo = *fdc->sc_data++; 1103 } 1104 if (--fdc->sc_tc == 0) { 1105 auxregbisc(AUXIO_FTC, 0); 1106 fdc->sc_istate = ISTATE_IDLE; 1107 delay(10); 1108 auxregbisc(0, AUXIO_FTC); 1109 fdcresult(fdc); 1110 ienab_bis(IE_FDSOFT); 1111 break; 1112 } 1113 } 1114 return 1; 1115 } 1116 #endif 1117 1118 int 1119 fdcswintr(fdc) 1120 struct fdc_softc *fdc; 1121 { 1122 #define st0 fdc->sc_status[0] 1123 #define st1 fdc->sc_status[1] 1124 #define cyl fdc->sc_status[1] 1125 #define OUT_FDC(fdc, c, s) \ 1126 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1127 1128 struct fd_softc *fd; 1129 struct buf *bp; 1130 int read, head, sec, nblks; 1131 struct fd_type *type; 1132 1133 1134 if (fdc->sc_istate != ISTATE_IDLE) { 1135 /* Trouble... */ 1136 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1137 fdc->sc_state, fdc->sc_istate); 1138 fdc->sc_istate = ISTATE_IDLE; 1139 if (fdc->sc_state == RESETCOMPLETE || 1140 fdc->sc_state == RESETTIMEDOUT) { 1141 panic("fdcintr: spurious interrupt can't be cleared"); 1142 } 1143 goto doreset; 1144 } 1145 1146 loop: 1147 /* Is there a drive for the controller to do a transfer with? */ 1148 fd = fdc->sc_drives.tqh_first; 1149 if (fd == NULL) { 1150 fdc->sc_state = DEVIDLE; 1151 return 0; 1152 } 1153 1154 /* Is there a transfer to this drive? If not, deactivate drive. */ 1155 bp = fd->sc_q.b_actf; 1156 if (bp == NULL) { 1157 fd->sc_ops = 0; 1158 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1159 fd->sc_q.b_active = 0; 1160 goto loop; 1161 } 1162 1163 switch (fdc->sc_state) { 1164 case DEVIDLE: 1165 fdc->sc_errors = 0; 1166 fd->sc_skip = 0; 1167 fd->sc_bcount = bp->b_bcount; 1168 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1169 untimeout(fd_motor_off, fd); 1170 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1171 fdc->sc_state = MOTORWAIT; 1172 return 1; 1173 } 1174 if ((fd->sc_flags & FD_MOTOR) == 0) { 1175 /* Turn on the motor, being careful about pairing. */ 1176 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1177 if (ofd && ofd->sc_flags & FD_MOTOR) { 1178 untimeout(fd_motor_off, ofd); 1179 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1180 } 1181 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1182 fd_set_motor(fdc); 1183 fdc->sc_state = MOTORWAIT; 1184 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1185 /* Allow .25s for motor to stabilize. */ 1186 timeout(fd_motor_on, fd, hz / 4); 1187 } else { 1188 fd->sc_flags &= ~FD_MOTOR_WAIT; 1189 goto loop; 1190 } 1191 return 1; 1192 } 1193 /* Make sure the right drive is selected. */ 1194 fd_set_motor(fdc); 1195 1196 /* fall through */ 1197 case DOSEEK: 1198 doseek: 1199 if (fdc->sc_flags & FDC_EIS) { 1200 fd->sc_cylin = bp->b_cylin; 1201 /* We use implied seek */ 1202 goto doio; 1203 } 1204 1205 if (fd->sc_cylin == bp->b_cylin) 1206 goto doio; 1207 1208 /* specify command */ 1209 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1210 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1211 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1212 1213 fdc->sc_istate = ISTATE_SENSEI; 1214 /* seek function */ 1215 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1216 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1217 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1218 1219 fd->sc_cylin = -1; 1220 fdc->sc_state = SEEKWAIT; 1221 fdc->sc_nstat = 0; 1222 1223 fd->sc_dk.dk_seek++; 1224 disk_busy(&fd->sc_dk); 1225 1226 timeout(fdctimeout, fdc, 4 * hz); 1227 return 1; 1228 1229 case DOIO: 1230 doio: 1231 type = fd->sc_type; 1232 sec = fd->sc_blkno % type->seccyl; 1233 nblks = type->seccyl - sec; 1234 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1235 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1236 fd->sc_nblks = nblks; 1237 fd->sc_nbytes = nblks * FDC_BSIZE; 1238 head = sec / type->sectrac; 1239 sec -= head * type->sectrac; 1240 #ifdef DIAGNOSTIC 1241 {int block; 1242 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1243 if (block != fd->sc_blkno) { 1244 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1245 #ifdef DDB 1246 Debugger(); 1247 #endif 1248 }} 1249 #endif 1250 read = bp->b_flags & B_READ; 1251 1252 /* Setup for pseudo DMA */ 1253 fdc->sc_data = bp->b_data + fd->sc_skip; 1254 fdc->sc_tc = fd->sc_nbytes; 1255 1256 *fdc->sc_reg_drs = type->rate; 1257 #ifdef FD_DEBUG 1258 if (fdc_debug > 1) 1259 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1260 read ? "read" : "write", fd->sc_drive, 1261 fd->sc_cylin, head, sec, nblks); 1262 #endif 1263 fdc->sc_state = IOCOMPLETE; 1264 fdc->sc_istate = ISTATE_DMA; 1265 fdc->sc_nstat = 0; 1266 if (read) 1267 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1268 else 1269 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1270 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1271 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1272 OUT_FDC(fdc, head, IOTIMEDOUT); 1273 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1274 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1275 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1276 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1277 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1278 1279 disk_busy(&fd->sc_dk); 1280 1281 /* allow 2 seconds for operation */ 1282 timeout(fdctimeout, fdc, 2 * hz); 1283 return 1; /* will return later */ 1284 1285 case SEEKWAIT: 1286 untimeout(fdctimeout, fdc); 1287 fdc->sc_state = SEEKCOMPLETE; 1288 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1289 /* allow 1/50 second for heads to settle */ 1290 timeout(fdcpseudointr, fdc, hz / 50); 1291 return 1; /* will return later */ 1292 } 1293 1294 case SEEKCOMPLETE: 1295 disk_unbusy(&fd->sc_dk, 0); /* no data on seek */ 1296 1297 /* Make sure seek really happened. */ 1298 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1299 cyl != bp->b_cylin * fd->sc_type->step) { 1300 #ifdef FD_DEBUG 1301 if (fdc_debug) 1302 fdcstatus(&fd->sc_dv, 2, "seek failed"); 1303 #endif 1304 fdcretry(fdc); 1305 goto loop; 1306 } 1307 fd->sc_cylin = bp->b_cylin; 1308 goto doio; 1309 1310 case IOTIMEDOUT: 1311 auxregbisc(AUXIO_FTC, 0); 1312 delay(10); 1313 auxregbisc(0, AUXIO_FTC); 1314 (void)fdcresult(fdc); 1315 case SEEKTIMEDOUT: 1316 case RECALTIMEDOUT: 1317 case RESETTIMEDOUT: 1318 fdcretry(fdc); 1319 goto loop; 1320 1321 case IOCOMPLETE: /* IO DONE, post-analyze */ 1322 untimeout(fdctimeout, fdc); 1323 1324 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid)); 1325 1326 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1327 #ifdef FD_DEBUG 1328 if (fdc_debug) { 1329 fdcstatus(&fd->sc_dv, 7, 1330 bp->b_flags & B_READ 1331 ? "read failed" : "write failed"); 1332 printf("blkno %d nblks %d tc %d\n", 1333 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1334 } 1335 #endif 1336 if (fdc->sc_nstat == 7 && 1337 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1338 1339 /* 1340 * Silently retry overruns if no other 1341 * error bit is set. Adjust threshold. 1342 */ 1343 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1344 if (thr < 15) { 1345 thr++; 1346 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1347 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1348 #ifdef FD_DEBUG 1349 if (fdc_debug) 1350 printf("fdc: %d -> threshold\n", thr); 1351 #endif 1352 fdconf(fdc); 1353 fdc->sc_state = DOIO; 1354 fdc->sc_overruns = 0; 1355 } 1356 if (++fdc->sc_overruns < 3) 1357 goto loop; 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