fd.c revision 1.26
1 /* $NetBSD: fd.c,v 1.26 1996/03/17 02:01:03 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1993, 1994, 1995 Charles Hannum. 5 * Copyright (c) 1995 Paul Kranenburg. 6 * Copyright (c) 1990 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Don Ahn. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)fd.c 7.4 (Berkeley) 5/25/91 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/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 59 #include <dev/cons.h> 60 61 #include <machine/cpu.h> 62 #include <machine/autoconf.h> 63 #include <sparc/sparc/auxreg.h> 64 #include <sparc/dev/fdreg.h> 65 #include <sparc/dev/fdvar.h> 66 #include <sparc/dev/dev_conf.h> 67 68 #define FDUNIT(dev) (minor(dev) / 8) 69 #define FDTYPE(dev) (minor(dev) % 8) 70 71 #define b_cylin b_resid 72 73 #define FD_DEBUG 74 #ifdef FD_DEBUG 75 int fdc_debug = 0; 76 #endif 77 78 enum fdc_state { 79 DEVIDLE = 0, 80 MOTORWAIT, 81 DOSEEK, 82 SEEKWAIT, 83 SEEKTIMEDOUT, 84 SEEKCOMPLETE, 85 DOIO, 86 IOCOMPLETE, 87 IOTIMEDOUT, 88 DORESET, 89 RESETCOMPLETE, 90 RESETTIMEDOUT, 91 DORECAL, 92 RECALWAIT, 93 RECALTIMEDOUT, 94 RECALCOMPLETE, 95 }; 96 97 /* software state, per controller */ 98 struct fdc_softc { 99 struct device sc_dev; /* boilerplate */ 100 struct intrhand sc_sih; 101 struct intrhand sc_hih; 102 caddr_t sc_reg; 103 struct fd_softc *sc_fd[4]; /* pointers to children */ 104 TAILQ_HEAD(drivehead, fd_softc) sc_drives; 105 enum fdc_state sc_state; 106 int sc_flags; 107 #define FDC_82077 0x01 108 #define FDC_NEEDHEADSETTLE 0x02 109 #define FDC_EIS 0x04 110 int sc_errors; /* number of retries so far */ 111 int sc_overruns; /* number of DMA overruns */ 112 int sc_cfg; /* current configuration */ 113 struct fdcio sc_io; 114 #define sc_reg_msr sc_io.fdcio_reg_msr 115 #define sc_reg_fifo sc_io.fdcio_reg_fifo 116 #define sc_reg_dor sc_io.fdcio_reg_dor 117 #define sc_reg_drs sc_io.fdcio_reg_msr 118 #define sc_istate sc_io.fdcio_istate 119 #define sc_data sc_io.fdcio_data 120 #define sc_tc sc_io.fdcio_tc 121 #define sc_nstat sc_io.fdcio_nstat 122 #define sc_status sc_io.fdcio_status 123 #define sc_intrcnt sc_io.fdcio_intrcnt 124 }; 125 126 #ifndef FDC_C_HANDLER 127 extern struct fdcio *fdciop; 128 #endif 129 130 /* controller driver configuration */ 131 int fdcmatch __P((struct device *, void *, void *)); 132 void fdcattach __P((struct device *, struct device *, void *)); 133 134 struct cfattach fdc_ca = { 135 sizeof(struct fdc_softc), fdcmatch, fdcattach 136 }; 137 138 struct cfdriver fdc_cd = { 139 NULL, "fdc", DV_DULL 140 }; 141 142 __inline struct fd_type *fd_dev_to_type __P((struct fd_softc *, dev_t)); 143 144 /* 145 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 146 * we tell them apart. 147 */ 148 struct fd_type { 149 int sectrac; /* sectors per track */ 150 int heads; /* number of heads */ 151 int seccyl; /* sectors per cylinder */ 152 int secsize; /* size code for sectors */ 153 int datalen; /* data len when secsize = 0 */ 154 int steprate; /* step rate and head unload time */ 155 int gap1; /* gap len between sectors */ 156 int gap2; /* formatting gap */ 157 int tracks; /* total num of tracks */ 158 int size; /* size of disk in sectors */ 159 int step; /* steps per cylinder */ 160 int rate; /* transfer speed code */ 161 char *name; 162 }; 163 164 /* The order of entries in the following table is important -- BEWARE! */ 165 struct fd_type fd_types[] = { 166 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */ 167 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,"1.2MB" }, /* 1.2 MB AT-diskettes */ 168 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,"360KB/AT" }, /* 360kB in 1.2MB drive */ 169 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,"360KB/PC" }, /* 360kB PC diskettes */ 170 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,"720KB" }, /* 3.5" 720kB diskette */ 171 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,"720KB/x" }, /* 720kB in 1.2MB drive */ 172 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,"360KB/x" }, /* 360kB in 720kB drive */ 173 }; 174 175 /* software state, per disk (with up to 4 disks per ctlr) */ 176 struct fd_softc { 177 struct device sc_dv; /* generic device info */ 178 struct disk sc_dk; /* generic disk info */ 179 180 struct fd_type *sc_deftype; /* default type descriptor */ 181 struct fd_type *sc_type; /* current type descriptor */ 182 183 daddr_t sc_blkno; /* starting block number */ 184 int sc_bcount; /* byte count left */ 185 int sc_skip; /* bytes already transferred */ 186 int sc_nblks; /* number of blocks currently tranferring */ 187 int sc_nbytes; /* number of bytes currently tranferring */ 188 189 int sc_drive; /* physical unit number */ 190 int sc_flags; 191 #define FD_OPEN 0x01 /* it's open */ 192 #define FD_MOTOR 0x02 /* motor should be on */ 193 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 194 int sc_cylin; /* where we think the head is */ 195 196 void *sc_sdhook; /* shutdownhook cookie */ 197 198 TAILQ_ENTRY(fd_softc) sc_drivechain; 199 int sc_ops; /* I/O ops since last switch */ 200 struct buf sc_q; /* head of buf chain */ 201 }; 202 203 /* floppy driver configuration */ 204 int fdmatch __P((struct device *, void *, void *)); 205 void fdattach __P((struct device *, struct device *, void *)); 206 207 struct cfattach fd_ca = { 208 sizeof(struct fd_softc), fdmatch, fdattach 209 }; 210 211 struct cfdriver fd_cd = { 212 NULL, "fd", DV_DISK 213 }; 214 215 void fdgetdisklabel __P((dev_t)); 216 int fd_get_parms __P((struct fd_softc *)); 217 void fdstrategy __P((struct buf *)); 218 void fdstart __P((struct fd_softc *)); 219 int fdprint __P((void *, char *)); 220 221 struct dkdriver fddkdriver = { fdstrategy }; 222 223 struct fd_type *fd_nvtotype __P((char *, int, int)); 224 void fd_set_motor __P((struct fdc_softc *fdc)); 225 void fd_motor_off __P((void *arg)); 226 void fd_motor_on __P((void *arg)); 227 int fdcresult __P((struct fdc_softc *fdc)); 228 int out_fdc __P((struct fdc_softc *fdc, u_char x)); 229 void fdcstart __P((struct fdc_softc *fdc)); 230 void fdcstatus __P((struct device *dv, int n, char *s)); 231 void fdc_reset __P((struct fdc_softc *fdc)); 232 void fdctimeout __P((void *arg)); 233 void fdcpseudointr __P((void *arg)); 234 #ifdef FDC_C_HANDLER 235 int fdchwintr __P((struct fdc_softc *)); 236 #else 237 void fdchwintr __P((void)); 238 #endif 239 int fdcswintr __P((struct fdc_softc *)); 240 void fdcretry __P((struct fdc_softc *fdc)); 241 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 242 void fd_do_eject __P((void)); 243 void fd_mountroot_hook __P((struct device *)); 244 static void fdconf __P((struct fdc_softc *)); 245 246 #if PIL_FDSOFT == 4 247 #define IE_FDSOFT IE_L4 248 #else 249 #error 4 250 #endif 251 252 #define OBP_FDNAME (CPU_ISSUN4M ? "SUNW,fdtwo" : "fd") 253 254 static const char fmt1[] = " (st0 %b cyl %d)\n"; 255 static const char fmt2[] = " (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n"; 256 257 int 258 fdcmatch(parent, match, aux) 259 struct device *parent; 260 void *match, *aux; 261 { 262 register struct confargs *ca = aux; 263 register struct romaux *ra = &ca->ca_ra; 264 265 /* 266 * Floppy doesn't exist on sun4. 267 */ 268 if (CPU_ISSUN4) 269 return (0); 270 271 /* 272 * Floppy controller is on mainbus on sun4c. 273 */ 274 if ((CPU_ISSUN4C) && (ca->ca_bustype != BUS_MAIN)) 275 return (0); 276 277 /* 278 * Floppy controller is on obio on sun4m. 279 */ 280 if ((CPU_ISSUN4M) && (ca->ca_bustype != BUS_OBIO)) 281 return (0); 282 283 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 284 if (strcmp(OBP_FDNAME, ra->ra_name)) 285 return (0); 286 287 if (ca->ca_ra.ra_vaddr && 288 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 289 return (0); 290 } 291 292 return (1); 293 } 294 295 /* 296 * Arguments passed between fdcattach and fdprobe. 297 */ 298 struct fdc_attach_args { 299 int fa_drive; 300 int fa_bootdev; 301 struct fd_type *fa_deftype; 302 }; 303 304 /* 305 * Print the location of a disk drive (called just before attaching the 306 * the drive). If `fdc' is not NULL, the drive was found but was not 307 * in the system config file; print the drive name as well. 308 * Return QUIET (config_find ignores this if the device was configured) to 309 * avoid printing `fdN not configured' messages. 310 */ 311 int 312 fdprint(aux, fdc) 313 void *aux; 314 char *fdc; 315 { 316 register struct fdc_attach_args *fa = aux; 317 318 if (!fdc) 319 printf(" drive %d", fa->fa_drive); 320 return QUIET; 321 } 322 323 static void 324 fdconf(fdc) 325 struct fdc_softc *fdc; 326 { 327 int vroom; 328 329 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 330 return; 331 332 /* 333 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 334 * the PROM thinks is appropriate. 335 */ 336 if ((vroom = fdc->sc_status[7]) == 0) 337 vroom = 0x64; 338 339 /* Configure controller to use FIFO and Implied Seek */ 340 out_fdc(fdc, NE7CMD_CFG); 341 out_fdc(fdc, vroom); 342 out_fdc(fdc, fdc->sc_cfg); 343 out_fdc(fdc, 0); /* PRETRK */ 344 /* No result phase */ 345 } 346 347 void 348 fdcattach(parent, self, aux) 349 struct device *parent, *self; 350 void *aux; 351 { 352 register struct confargs *ca = aux; 353 struct fdc_softc *fdc = (void *)self; 354 struct fdc_attach_args fa; 355 struct bootpath *bp; 356 int pri; 357 char code; 358 359 if (ca->ca_ra.ra_vaddr) 360 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 361 else 362 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_reg, 0, 363 ca->ca_ra.ra_len, 364 ca->ca_bustype); 365 366 fdc->sc_state = DEVIDLE; 367 fdc->sc_istate = ISTATE_IDLE; 368 fdc->sc_flags |= FDC_EIS; 369 TAILQ_INIT(&fdc->sc_drives); 370 371 pri = ca->ca_ra.ra_intr[0].int_pri; 372 #ifdef FDC_C_HANDLER 373 fdc->sc_hih.ih_fun = (void *)fdchwintr; 374 fdc->sc_hih.ih_arg = fdc; 375 intr_establish(pri, &fdc->sc_hih); 376 #else 377 fdciop = &fdc->sc_io; 378 intr_fasttrap(pri, fdchwintr); 379 #endif 380 fdc->sc_sih.ih_fun = (void *)fdcswintr; 381 fdc->sc_sih.ih_arg = fdc; 382 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 383 384 /* Assume a 82077 */ 385 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 386 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 387 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 388 389 code = '7'; 390 if (*fdc->sc_reg_dor == NE7_RQM) { 391 /* 392 * This hack from Chris Torek: apparently DOR really 393 * addresses MSR/DRS on a 82072. 394 * We used to rely on the VERSION command to tell the 395 * difference (which did not work). 396 */ 397 *fdc->sc_reg_dor = FDC_250KBPS; 398 if (*fdc->sc_reg_dor == NE7_RQM) 399 code = '2'; 400 } 401 if (code == '7') { 402 fdc->sc_flags |= FDC_82077; 403 } else { 404 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 405 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 406 fdc->sc_reg_dor = 0; 407 } 408 409 #ifdef FD_DEBUG 410 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 411 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 412 if (fdc_debug) 413 printf("[version cmd]"); 414 } 415 #endif 416 417 /* 418 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 419 * Note: CFG_EFIFO is active-low, initial threshold value: 8 420 */ 421 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 422 fdconf(fdc); 423 424 if (fdc->sc_flags & FDC_82077) { 425 /* Lock configuration across soft resets. */ 426 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 427 if (fdcresult(fdc) != 1) 428 printf(" CFGLOCK: unexpected response"); 429 } 430 431 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 432 433 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 434 435 /* 436 * Controller and drives are represented by one and the same 437 * Openprom node, so we can as well check for the floppy boots here. 438 */ 439 fa.fa_bootdev = 0; 440 if ((bp = ca->ca_ra.ra_bp) && strcmp(bp->name, OBP_FDNAME) == 0) { 441 /* 442 * WOAH THERE! It looks like we can get the bootpath 443 * in several different formats!! The faked 444 * bootpath (and some v2?) looks like /fd@0,0 445 * but the real bootpath on some v2 OpenPROM 446 * systems looks like /fd0. In the case of 447 * a floppy controller on obio (such as on the sun4m), 448 * we use "slot, offset" to determine if this is the 449 * right one. --thorpej 450 */ 451 switch (ca->ca_bustype) { 452 case BUS_MAIN: 453 if (((bp->val[0] == 0) && /* /fd@0,0 */ 454 (bp->val[1] == 0)) || 455 ((bp->val[0] == -1) && /* /fd0 */ 456 (bp->val[1] == 0))) 457 fa.fa_bootdev = 1; 458 break; 459 460 case BUS_OBIO: 461 /* /obio0/SUNW,fdtwo@0,700000 */ 462 if ((bp->val[0] == ca->ca_slot) && 463 (bp->val[1] == ca->ca_offset)) 464 fa.fa_bootdev = 1; 465 break; 466 } 467 468 } 469 470 /* physical limit: four drives per controller. */ 471 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 472 fa.fa_deftype = NULL; /* unknown */ 473 fa.fa_deftype = &fd_types[0]; /* XXX */ 474 (void)config_found(self, (void *)&fa, fdprint); 475 } 476 477 bootpath_store(1, NULL); 478 } 479 480 int 481 fdmatch(parent, match, aux) 482 struct device *parent; 483 void *match, *aux; 484 { 485 struct fdc_softc *fdc = (void *)parent; 486 struct fdc_attach_args *fa = aux; 487 int drive = fa->fa_drive; 488 int n; 489 490 if (drive > 0) 491 /* XXX - for now, punt > 1 drives */ 492 return 0; 493 494 if (fdc->sc_flags & FDC_82077) { 495 /* select drive and turn on motor */ 496 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 497 /* wait for motor to spin up */ 498 delay(250000); 499 } else { 500 auxregbisc(AUXIO_FDS, 0); 501 } 502 fdc->sc_nstat = 0; 503 out_fdc(fdc, NE7CMD_RECAL); 504 out_fdc(fdc, drive); 505 /* wait for recalibrate */ 506 for (n = 0; n < 100000; n++) { 507 delay(10); 508 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 509 /* wait a bit longer till device *really* is ready */ 510 delay(100000); 511 if (out_fdc(fdc, NE7CMD_SENSEI)) 512 break; 513 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 514 /* 515 * Got `invalid command'; we interpret it 516 * to mean that the re-calibrate hasn't in 517 * fact finished yet 518 */ 519 continue; 520 break; 521 } 522 } 523 n = fdc->sc_nstat; 524 #ifdef FD_DEBUG 525 if (fdc_debug) { 526 int i; 527 printf("fdprobe: %d stati:", n); 528 for (i = 0; i < n; i++) 529 printf(" %x", fdc->sc_status[i]); 530 printf("\n"); 531 } 532 #endif 533 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 534 return 0; 535 /* turn off motor */ 536 if (fdc->sc_flags & FDC_82077) { 537 /* select drive and turn on motor */ 538 *fdc->sc_reg_dor = FDO_FRST; 539 } else { 540 auxregbisc(0, AUXIO_FDS); 541 } 542 543 return 1; 544 } 545 546 /* 547 * Controller is working, and drive responded. Attach it. 548 */ 549 void 550 fdattach(parent, self, aux) 551 struct device *parent, *self; 552 void *aux; 553 { 554 struct fdc_softc *fdc = (void *)parent; 555 struct fd_softc *fd = (void *)self; 556 struct fdc_attach_args *fa = aux; 557 struct fd_type *type = fa->fa_deftype; 558 int drive = fa->fa_drive; 559 560 /* XXX Allow `flags' to override device type? */ 561 562 if (type) 563 printf(": %s %d cyl, %d head, %d sec\n", type->name, 564 type->tracks, type->heads, type->sectrac); 565 else 566 printf(": density unknown\n"); 567 568 fd->sc_cylin = -1; 569 fd->sc_drive = drive; 570 fd->sc_deftype = type; 571 fdc->sc_fd[drive] = fd; 572 573 /* 574 * Initialize and attach the disk structure. 575 */ 576 fd->sc_dk.dk_name = fd->sc_dv.dv_xname; 577 fd->sc_dk.dk_driver = &fddkdriver; 578 disk_attach(&fd->sc_dk); 579 580 /* 581 * We're told if we're the boot device in fdcattach(). 582 */ 583 if (fa->fa_bootdev) 584 bootdv = &fd->sc_dv; 585 586 /* 587 * Establish a mountroot_hook anyway in case we booted 588 * with RB_ASKNAME and get selected as the boot device. 589 */ 590 mountroot_hook_establish(fd_mountroot_hook, &fd->sc_dv); 591 592 /* Make sure the drive motor gets turned off at shutdown time. */ 593 fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd); 594 595 /* XXX Need to do some more fiddling with sc_dk. */ 596 dk_establish(&fd->sc_dk, &fd->sc_dv); 597 } 598 599 __inline struct fd_type * 600 fd_dev_to_type(fd, dev) 601 struct fd_softc *fd; 602 dev_t dev; 603 { 604 int type = FDTYPE(dev); 605 606 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 607 return NULL; 608 return type ? &fd_types[type - 1] : fd->sc_deftype; 609 } 610 611 void 612 fdstrategy(bp) 613 register struct buf *bp; /* IO operation to perform */ 614 { 615 struct fd_softc *fd; 616 int unit = FDUNIT(bp->b_dev); 617 int sz; 618 int s; 619 620 /* Valid unit, controller, and request? */ 621 if (unit >= fd_cd.cd_ndevs || 622 (fd = fd_cd.cd_devs[unit]) == 0 || 623 bp->b_blkno < 0 || 624 (bp->b_bcount % FDC_BSIZE) != 0) { 625 bp->b_error = EINVAL; 626 goto bad; 627 } 628 629 /* If it's a null transfer, return immediately. */ 630 if (bp->b_bcount == 0) 631 goto done; 632 633 sz = howmany(bp->b_bcount, FDC_BSIZE); 634 635 if (bp->b_blkno + sz > fd->sc_type->size) { 636 sz = fd->sc_type->size - bp->b_blkno; 637 if (sz == 0) { 638 /* If exactly at end of disk, return EOF. */ 639 bp->b_resid = bp->b_bcount; 640 goto done; 641 } 642 if (sz < 0) { 643 /* If past end of disk, return EINVAL. */ 644 bp->b_error = EINVAL; 645 goto bad; 646 } 647 /* Otherwise, truncate request. */ 648 bp->b_bcount = sz << DEV_BSHIFT; 649 } 650 651 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 652 653 #ifdef FD_DEBUG 654 if (fdc_debug > 1) 655 printf("fdstrategy: b_blkno %d b_bcount %ld blkno %d cylin %ld\n", 656 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 657 #endif 658 659 /* Queue transfer on drive, activate drive and controller if idle. */ 660 s = splbio(); 661 disksort(&fd->sc_q, bp); 662 untimeout(fd_motor_off, fd); /* a good idea */ 663 if (!fd->sc_q.b_active) 664 fdstart(fd); 665 #ifdef DIAGNOSTIC 666 else { 667 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 668 if (fdc->sc_state == DEVIDLE) { 669 printf("fdstrategy: controller inactive\n"); 670 fdcstart(fdc); 671 } 672 } 673 #endif 674 splx(s); 675 return; 676 677 bad: 678 bp->b_flags |= B_ERROR; 679 done: 680 /* Toss transfer; we're done early. */ 681 biodone(bp); 682 } 683 684 void 685 fdstart(fd) 686 struct fd_softc *fd; 687 { 688 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 689 int active = fdc->sc_drives.tqh_first != 0; 690 691 /* Link into controller queue. */ 692 fd->sc_q.b_active = 1; 693 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 694 695 /* If controller not already active, start it. */ 696 if (!active) 697 fdcstart(fdc); 698 } 699 700 void 701 fdfinish(fd, bp) 702 struct fd_softc *fd; 703 struct buf *bp; 704 { 705 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 706 707 /* 708 * Move this drive to the end of the queue to give others a `fair' 709 * chance. We only force a switch if N operations are completed while 710 * another drive is waiting to be serviced, since there is a long motor 711 * startup delay whenever we switch. 712 */ 713 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 714 fd->sc_ops = 0; 715 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 716 if (bp->b_actf) { 717 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 718 } else 719 fd->sc_q.b_active = 0; 720 } 721 bp->b_resid = fd->sc_bcount; 722 fd->sc_skip = 0; 723 fd->sc_q.b_actf = bp->b_actf; 724 725 biodone(bp); 726 /* turn off motor 5s from now */ 727 timeout(fd_motor_off, fd, 5 * hz); 728 fdc->sc_state = DEVIDLE; 729 } 730 731 void 732 fdc_reset(fdc) 733 struct fdc_softc *fdc; 734 { 735 if (fdc->sc_flags & FDC_82077) { 736 *fdc->sc_reg_dor = FDO_MOEN(0); 737 } 738 739 *fdc->sc_reg_drs = DRS_RESET; 740 delay(10); 741 *fdc->sc_reg_drs = 0; 742 #ifdef FD_DEBUG 743 if (fdc_debug) 744 printf("fdc reset\n"); 745 #endif 746 } 747 748 void 749 fd_set_motor(fdc) 750 struct fdc_softc *fdc; 751 { 752 struct fd_softc *fd; 753 u_char status; 754 int n; 755 756 if (fdc->sc_flags & FDC_82077) { 757 status = FDO_FRST | FDO_FDMAEN; 758 if ((fd = fdc->sc_drives.tqh_first) != NULL) 759 status |= fd->sc_drive; 760 761 for (n = 0; n < 4; n++) 762 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 763 status |= FDO_MOEN(n); 764 *fdc->sc_reg_dor = status; 765 } else { 766 int on = 0; 767 768 for (n = 0; n < 4; n++) 769 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 770 on = 1; 771 if (on) { 772 auxregbisc(AUXIO_FDS, 0); 773 } else { 774 auxregbisc(0, AUXIO_FDS); 775 } 776 } 777 } 778 779 void 780 fd_motor_off(arg) 781 void *arg; 782 { 783 struct fd_softc *fd = arg; 784 int s; 785 786 s = splbio(); 787 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 788 fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent); 789 splx(s); 790 } 791 792 void 793 fd_motor_on(arg) 794 void *arg; 795 { 796 struct fd_softc *fd = arg; 797 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 798 int s; 799 800 s = splbio(); 801 fd->sc_flags &= ~FD_MOTOR_WAIT; 802 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 803 (void) fdcswintr(fdc); 804 splx(s); 805 } 806 807 int 808 fdcresult(fdc) 809 struct fdc_softc *fdc; 810 { 811 u_char i; 812 int j = 100000, 813 n = 0; 814 815 for (; j; j--) { 816 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 817 if (i == NE7_RQM) 818 return (fdc->sc_nstat = n); 819 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 820 if (n >= sizeof(fdc->sc_status)) { 821 log(LOG_ERR, "fdcresult: overrun\n"); 822 return -1; 823 } 824 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 825 } 826 } 827 log(LOG_ERR, "fdcresult: timeout\n"); 828 return (fdc->sc_nstat = -1); 829 } 830 831 int 832 out_fdc(fdc, x) 833 struct fdc_softc *fdc; 834 u_char x; 835 { 836 int i = 100000; 837 838 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 839 if (i <= 0) 840 return -1; 841 842 *fdc->sc_reg_fifo = x; 843 return 0; 844 } 845 846 int 847 fdopen(dev, flags, fmt, p) 848 dev_t dev; 849 int flags, fmt; 850 struct proc *p; 851 { 852 int unit, pmask; 853 struct fd_softc *fd; 854 struct fd_type *type; 855 856 unit = FDUNIT(dev); 857 if (unit >= fd_cd.cd_ndevs) 858 return ENXIO; 859 fd = fd_cd.cd_devs[unit]; 860 if (fd == 0) 861 return ENXIO; 862 type = fd_dev_to_type(fd, dev); 863 if (type == NULL) 864 return ENXIO; 865 866 if ((fd->sc_flags & FD_OPEN) != 0 && 867 fd->sc_type != type) 868 return EBUSY; 869 870 fd->sc_type = type; 871 fd->sc_cylin = -1; 872 fd->sc_flags |= FD_OPEN; 873 874 /* 875 * Only update the disklabel if we're not open anywhere else. 876 */ 877 if (fd->sc_dk.dk_openmask == 0) 878 fdgetdisklabel(dev); 879 880 pmask = (1 << DISKPART(dev)); 881 882 switch (fmt) { 883 case S_IFCHR: 884 fd->sc_dk.dk_copenmask |= pmask; 885 break; 886 887 case S_IFBLK: 888 fd->sc_dk.dk_bopenmask |= pmask; 889 break; 890 } 891 fd->sc_dk.dk_openmask = 892 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 893 894 return 0; 895 } 896 897 int 898 fdclose(dev, flags, fmt, p) 899 dev_t dev; 900 int flags, fmt; 901 struct proc *p; 902 { 903 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 904 int pmask = (1 << DISKPART(dev)); 905 906 fd->sc_flags &= ~FD_OPEN; 907 908 switch (fmt) { 909 case S_IFCHR: 910 fd->sc_dk.dk_copenmask &= ~pmask; 911 break; 912 913 case S_IFBLK: 914 fd->sc_dk.dk_bopenmask &= ~pmask; 915 break; 916 } 917 fd->sc_dk.dk_openmask = 918 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 919 920 return 0; 921 } 922 923 int 924 fdread(dev, uio, flag) 925 dev_t dev; 926 struct uio *uio; 927 int flag; 928 { 929 930 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 931 } 932 933 int 934 fdwrite(dev, uio, flag) 935 dev_t dev; 936 struct uio *uio; 937 int flag; 938 { 939 940 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 941 } 942 943 void 944 fdcstart(fdc) 945 struct fdc_softc *fdc; 946 { 947 948 #ifdef DIAGNOSTIC 949 /* only got here if controller's drive queue was inactive; should 950 be in idle state */ 951 if (fdc->sc_state != DEVIDLE) { 952 printf("fdcstart: not idle\n"); 953 return; 954 } 955 #endif 956 (void) fdcswintr(fdc); 957 } 958 959 void 960 fdcstatus(dv, n, s) 961 struct device *dv; 962 int n; 963 char *s; 964 { 965 struct fdc_softc *fdc = (void *)dv->dv_parent; 966 #if 0 967 /* 968 * A 82072 seems to return <invalid command> on 969 * gratuitous Sense Interrupt commands. 970 */ 971 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 972 out_fdc(fdc, NE7CMD_SENSEI); 973 (void) fdcresult(fdc); 974 n = 2; 975 } 976 #endif 977 978 /* Just print last status */ 979 n = fdc->sc_nstat; 980 981 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 982 983 switch (n) { 984 case 0: 985 printf("\n"); 986 break; 987 case 2: 988 printf(fmt1, 989 fdc->sc_status[0], NE7_ST0BITS, 990 fdc->sc_status[1]); 991 break; 992 case 7: 993 printf(fmt2, 994 fdc->sc_status[0], NE7_ST0BITS, 995 fdc->sc_status[1], NE7_ST1BITS, 996 fdc->sc_status[2], NE7_ST2BITS, 997 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 998 break; 999 #ifdef DIAGNOSTIC 1000 default: 1001 printf(" fdcstatus: weird size: %d\n", n); 1002 break; 1003 #endif 1004 } 1005 } 1006 1007 void 1008 fdctimeout(arg) 1009 void *arg; 1010 { 1011 struct fdc_softc *fdc = arg; 1012 struct fd_softc *fd = fdc->sc_drives.tqh_first; 1013 int s; 1014 1015 s = splbio(); 1016 fdcstatus(&fd->sc_dv, 0, "timeout"); 1017 1018 if (fd->sc_q.b_actf) 1019 fdc->sc_state++; 1020 else 1021 fdc->sc_state = DEVIDLE; 1022 1023 (void) fdcswintr(fdc); 1024 splx(s); 1025 } 1026 1027 void 1028 fdcpseudointr(arg) 1029 void *arg; 1030 { 1031 struct fdc_softc *fdc = arg; 1032 int s; 1033 1034 /* Just ensure it has the right spl. */ 1035 s = splbio(); 1036 (void) fdcswintr(fdc); 1037 splx(s); 1038 } 1039 1040 1041 #ifdef FDC_C_HANDLER 1042 /* 1043 * hardware interrupt entry point: must be converted to `fast' 1044 * (in-window) handler. 1045 */ 1046 int 1047 fdchwintr(fdc) 1048 struct fdc_softc *fdc; 1049 { 1050 struct buf *bp; 1051 int read; 1052 1053 switch (fdc->sc_istate) { 1054 case ISTATE_SENSEI: 1055 out_fdc(fdc, NE7CMD_SENSEI); 1056 fdcresult(fdc); 1057 fdc->sc_istate = ISTATE_IDLE; 1058 ienab_bis(IE_FDSOFT); 1059 return 1; 1060 case ISTATE_IDLE: 1061 case ISTATE_SPURIOUS: 1062 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 1063 fdcresult(fdc); 1064 fdc->sc_istate = ISTATE_SPURIOUS; 1065 printf("fdc: stray hard interrupt... "); 1066 ienab_bis(IE_FDSOFT); 1067 return 1; 1068 case ISTATE_DMA: 1069 break; 1070 default: 1071 printf("fdc: goofed ...\n"); 1072 return 1; 1073 } 1074 1075 read = bp->b_flags & B_READ; 1076 for (;;) { 1077 register int msr; 1078 1079 msr = *fdc->sc_reg_msr; 1080 1081 if ((msr & NE7_RQM) == 0) 1082 break; 1083 1084 if ((msr & NE7_NDM) == 0) { 1085 fdcresult(fdc); 1086 fdc->sc_istate = ISTATE_IDLE; 1087 ienab_bis(IE_FDSOFT); 1088 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 1089 break; 1090 } 1091 1092 if (msr & NE7_DIO) { 1093 #ifdef DIAGNOSTIC 1094 if (!read) 1095 printf("fdxfer: false read\n"); 1096 #endif 1097 *fdc->sc_data++ = *fdc->sc_reg_fifo; 1098 } else { 1099 #ifdef DIAGNOSTIC 1100 if (read) 1101 printf("fdxfer: false write\n"); 1102 #endif 1103 *fdc->sc_reg_fifo = *fdc->sc_data++; 1104 } 1105 if (--fdc->sc_tc == 0) { 1106 auxregbisc(AUXIO_FTC, 0); 1107 fdc->sc_istate = ISTATE_IDLE; 1108 delay(10); 1109 auxregbisc(0, AUXIO_FTC); 1110 fdcresult(fdc); 1111 ienab_bis(IE_FDSOFT); 1112 break; 1113 } 1114 } 1115 return 1; 1116 } 1117 #endif 1118 1119 int 1120 fdcswintr(fdc) 1121 struct fdc_softc *fdc; 1122 { 1123 #define st0 fdc->sc_status[0] 1124 #define st1 fdc->sc_status[1] 1125 #define cyl fdc->sc_status[1] 1126 #define OUT_FDC(fdc, c, s) \ 1127 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1128 1129 struct fd_softc *fd; 1130 struct buf *bp; 1131 int read, head, sec, nblks; 1132 struct fd_type *type; 1133 1134 1135 if (fdc->sc_istate != ISTATE_IDLE) { 1136 /* Trouble... */ 1137 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1138 fdc->sc_state, fdc->sc_istate); 1139 fdc->sc_istate = ISTATE_IDLE; 1140 if (fdc->sc_state == RESETCOMPLETE || 1141 fdc->sc_state == RESETTIMEDOUT) { 1142 panic("fdcintr: spurious interrupt can't be cleared"); 1143 } 1144 goto doreset; 1145 } 1146 1147 loop: 1148 /* Is there a drive for the controller to do a transfer with? */ 1149 fd = fdc->sc_drives.tqh_first; 1150 if (fd == NULL) { 1151 fdc->sc_state = DEVIDLE; 1152 return 0; 1153 } 1154 1155 /* Is there a transfer to this drive? If not, deactivate drive. */ 1156 bp = fd->sc_q.b_actf; 1157 if (bp == NULL) { 1158 fd->sc_ops = 0; 1159 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1160 fd->sc_q.b_active = 0; 1161 goto loop; 1162 } 1163 1164 switch (fdc->sc_state) { 1165 case DEVIDLE: 1166 fdc->sc_errors = 0; 1167 fd->sc_skip = 0; 1168 fd->sc_bcount = bp->b_bcount; 1169 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1170 untimeout(fd_motor_off, fd); 1171 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1172 fdc->sc_state = MOTORWAIT; 1173 return 1; 1174 } 1175 if ((fd->sc_flags & FD_MOTOR) == 0) { 1176 /* Turn on the motor, being careful about pairing. */ 1177 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1178 if (ofd && ofd->sc_flags & FD_MOTOR) { 1179 untimeout(fd_motor_off, ofd); 1180 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1181 } 1182 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1183 fd_set_motor(fdc); 1184 fdc->sc_state = MOTORWAIT; 1185 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1186 /* Allow .25s for motor to stabilize. */ 1187 timeout(fd_motor_on, fd, hz / 4); 1188 } else { 1189 fd->sc_flags &= ~FD_MOTOR_WAIT; 1190 goto loop; 1191 } 1192 return 1; 1193 } 1194 /* Make sure the right drive is selected. */ 1195 fd_set_motor(fdc); 1196 1197 /* fall through */ 1198 case DOSEEK: 1199 doseek: 1200 if (fdc->sc_flags & FDC_EIS) { 1201 fd->sc_cylin = bp->b_cylin; 1202 /* We use implied seek */ 1203 goto doio; 1204 } 1205 1206 if (fd->sc_cylin == bp->b_cylin) 1207 goto doio; 1208 1209 /* specify command */ 1210 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1211 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1212 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1213 1214 fdc->sc_istate = ISTATE_SENSEI; 1215 /* seek function */ 1216 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1217 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1218 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1219 1220 fd->sc_cylin = -1; 1221 fdc->sc_state = SEEKWAIT; 1222 fdc->sc_nstat = 0; 1223 1224 fd->sc_dk.dk_seek++; 1225 disk_busy(&fd->sc_dk); 1226 1227 timeout(fdctimeout, fdc, 4 * hz); 1228 return 1; 1229 1230 case DOIO: 1231 doio: 1232 type = fd->sc_type; 1233 sec = fd->sc_blkno % type->seccyl; 1234 nblks = type->seccyl - sec; 1235 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1236 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1237 fd->sc_nblks = nblks; 1238 fd->sc_nbytes = nblks * FDC_BSIZE; 1239 head = sec / type->sectrac; 1240 sec -= head * type->sectrac; 1241 #ifdef DIAGNOSTIC 1242 {int block; 1243 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1244 if (block != fd->sc_blkno) { 1245 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1246 #ifdef DDB 1247 Debugger(); 1248 #endif 1249 }} 1250 #endif 1251 read = bp->b_flags & B_READ; 1252 1253 /* Setup for pseudo DMA */ 1254 fdc->sc_data = bp->b_data + fd->sc_skip; 1255 fdc->sc_tc = fd->sc_nbytes; 1256 1257 *fdc->sc_reg_drs = type->rate; 1258 #ifdef FD_DEBUG 1259 if (fdc_debug > 1) 1260 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1261 read ? "read" : "write", fd->sc_drive, 1262 fd->sc_cylin, head, sec, nblks); 1263 #endif 1264 fdc->sc_state = IOCOMPLETE; 1265 fdc->sc_istate = ISTATE_DMA; 1266 fdc->sc_nstat = 0; 1267 if (read) 1268 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1269 else 1270 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1271 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1272 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1273 OUT_FDC(fdc, head, IOTIMEDOUT); 1274 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1275 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1276 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1277 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1278 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1279 1280 disk_busy(&fd->sc_dk); 1281 1282 /* allow 2 seconds for operation */ 1283 timeout(fdctimeout, fdc, 2 * hz); 1284 return 1; /* will return later */ 1285 1286 case SEEKWAIT: 1287 untimeout(fdctimeout, fdc); 1288 fdc->sc_state = SEEKCOMPLETE; 1289 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1290 /* allow 1/50 second for heads to settle */ 1291 timeout(fdcpseudointr, fdc, hz / 50); 1292 return 1; /* will return later */ 1293 } 1294 1295 case SEEKCOMPLETE: 1296 disk_unbusy(&fd->sc_dk, 0); /* no data on seek */ 1297 1298 /* Make sure seek really happened. */ 1299 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1300 cyl != bp->b_cylin * fd->sc_type->step) { 1301 #ifdef FD_DEBUG 1302 if (fdc_debug) 1303 fdcstatus(&fd->sc_dv, 2, "seek failed"); 1304 #endif 1305 fdcretry(fdc); 1306 goto loop; 1307 } 1308 fd->sc_cylin = bp->b_cylin; 1309 goto doio; 1310 1311 case IOTIMEDOUT: 1312 auxregbisc(AUXIO_FTC, 0); 1313 delay(10); 1314 auxregbisc(0, AUXIO_FTC); 1315 (void)fdcresult(fdc); 1316 case SEEKTIMEDOUT: 1317 case RECALTIMEDOUT: 1318 case RESETTIMEDOUT: 1319 fdcretry(fdc); 1320 goto loop; 1321 1322 case IOCOMPLETE: /* IO DONE, post-analyze */ 1323 untimeout(fdctimeout, fdc); 1324 1325 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid)); 1326 1327 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1328 #ifdef FD_DEBUG 1329 if (fdc_debug) { 1330 fdcstatus(&fd->sc_dv, 7, 1331 bp->b_flags & B_READ 1332 ? "read failed" : "write failed"); 1333 printf("blkno %d nblks %d tc %d\n", 1334 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1335 } 1336 #endif 1337 if (fdc->sc_nstat == 7 && 1338 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1339 1340 /* 1341 * Silently retry overruns if no other 1342 * error bit is set. Adjust threshold. 1343 */ 1344 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1345 if (thr < 15) { 1346 thr++; 1347 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1348 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1349 #ifdef FD_DEBUG 1350 if (fdc_debug) 1351 printf("fdc: %d -> threshold\n", thr); 1352 #endif 1353 fdconf(fdc); 1354 fdc->sc_state = DOIO; 1355 fdc->sc_overruns = 0; 1356 } 1357 if (++fdc->sc_overruns < 3) 1358 goto loop; 1359 } 1360 fdcretry(fdc); 1361 goto loop; 1362 } 1363 if (fdc->sc_errors) { 1364 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1365 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1366 printf("\n"); 1367 fdc->sc_errors = 0; 1368 } else { 1369 if (--fdc->sc_overruns < -20) { 1370 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1371 if (thr > 0) { 1372 thr--; 1373 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1374 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1375 #ifdef FD_DEBUG 1376 if (fdc_debug) 1377 printf("fdc: %d -> threshold\n", thr); 1378 #endif 1379 fdconf(fdc); 1380 } 1381 fdc->sc_overruns = 0; 1382 } 1383 } 1384 fd->sc_blkno += fd->sc_nblks; 1385 fd->sc_skip += fd->sc_nbytes; 1386 fd->sc_bcount -= fd->sc_nbytes; 1387 if (fd->sc_bcount > 0) { 1388 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1389 goto doseek; 1390 } 1391 fdfinish(fd, bp); 1392 goto loop; 1393 1394 case DORESET: 1395 doreset: 1396 /* try a reset, keep motor on */ 1397 fd_set_motor(fdc); 1398 delay(100); 1399 fdc_reset(fdc); 1400 fdc->sc_nstat = 0; 1401 fdc->sc_istate = ISTATE_SENSEI; 1402 fdc->sc_state = RESETCOMPLETE; 1403 timeout(fdctimeout, fdc, hz / 2); 1404 return 1; /* will return later */ 1405 1406 case RESETCOMPLETE: 1407 untimeout(fdctimeout, fdc); 1408 fdconf(fdc); 1409 1410 /* fall through */ 1411 case DORECAL: 1412 fdc->sc_state = RECALWAIT; 1413 fdc->sc_istate = ISTATE_SENSEI; 1414 fdc->sc_nstat = 0; 1415 /* recalibrate function */ 1416 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1417 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1418 timeout(fdctimeout, fdc, 5 * hz); 1419 return 1; /* will return later */ 1420 1421 case RECALWAIT: 1422 untimeout(fdctimeout, fdc); 1423 fdc->sc_state = RECALCOMPLETE; 1424 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1425 /* allow 1/30 second for heads to settle */ 1426 timeout(fdcpseudointr, fdc, hz / 30); 1427 return 1; /* will return later */ 1428 } 1429 1430 case RECALCOMPLETE: 1431 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1432 #ifdef FD_DEBUG 1433 if (fdc_debug) 1434 fdcstatus(&fd->sc_dv, 2, "recalibrate failed"); 1435 #endif 1436 fdcretry(fdc); 1437 goto loop; 1438 } 1439 fd->sc_cylin = 0; 1440 goto doseek; 1441 1442 case MOTORWAIT: 1443 if (fd->sc_flags & FD_MOTOR_WAIT) 1444 return 1; /* time's not up yet */ 1445 goto doseek; 1446 1447 default: 1448 fdcstatus(&fd->sc_dv, 0, "stray interrupt"); 1449 return 1; 1450 } 1451 #ifdef DIAGNOSTIC 1452 panic("fdcintr: impossible"); 1453 #endif 1454 #undef st0 1455 #undef st1 1456 #undef cyl 1457 } 1458 1459 void 1460 fdcretry(fdc) 1461 struct fdc_softc *fdc; 1462 { 1463 struct fd_softc *fd; 1464 struct buf *bp; 1465 1466 fd = fdc->sc_drives.tqh_first; 1467 bp = fd->sc_q.b_actf; 1468 1469 fdc->sc_overruns = 0; 1470 1471 switch (fdc->sc_errors) { 1472 case 0: 1473 /* try again */ 1474 fdc->sc_state = 1475 (fdc->sc_flags & FDC_EIS) ? DOIO : DOSEEK; 1476 break; 1477 1478 case 1: case 2: case 3: 1479 /* didn't work; try recalibrating */ 1480 fdc->sc_state = DORECAL; 1481 break; 1482 1483 case 4: 1484 /* still no go; reset the bastard */ 1485 fdc->sc_state = DORESET; 1486 break; 1487 1488 default: 1489 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1490 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1491 1492 printf(fmt2, 1493 fdc->sc_status[0], NE7_ST0BITS, 1494 fdc->sc_status[1], NE7_ST1BITS, 1495 fdc->sc_status[2], NE7_ST2BITS, 1496 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1497 1498 bp->b_flags |= B_ERROR; 1499 bp->b_error = EIO; 1500 fdfinish(fd, bp); 1501 } 1502 fdc->sc_errors++; 1503 } 1504 1505 int 1506 fdsize(dev) 1507 dev_t dev; 1508 { 1509 1510 /* Swapping to floppies would not make sense. */ 1511 return -1; 1512 } 1513 1514 int 1515 fddump(dev, blkno, va, size) 1516 dev_t dev; 1517 daddr_t blkno; 1518 caddr_t va; 1519 size_t size; 1520 { 1521 1522 /* Not implemented. */ 1523 return EINVAL; 1524 } 1525 1526 int 1527 fdioctl(dev, cmd, addr, flag, p) 1528 dev_t dev; 1529 u_long cmd; 1530 caddr_t addr; 1531 int flag; 1532 struct proc *p; 1533 { 1534 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 1535 int error; 1536 1537 switch (cmd) { 1538 case DIOCGDINFO: 1539 *(struct disklabel *)addr = *(fd->sc_dk.dk_label); 1540 return 0; 1541 1542 case DIOCWLABEL: 1543 if ((flag & FWRITE) == 0) 1544 return EBADF; 1545 /* XXX do something */ 1546 return 0; 1547 1548 case DIOCWDINFO: 1549 if ((flag & FWRITE) == 0) 1550 return EBADF; 1551 1552 error = setdisklabel(fd->sc_dk.dk_label, 1553 (struct disklabel *)addr, 0, 1554 fd->sc_dk.dk_cpulabel); 1555 if (error) 1556 return error; 1557 1558 error = writedisklabel(dev, fdstrategy, 1559 fd->sc_dk.dk_label, 1560 fd->sc_dk.dk_cpulabel); 1561 return error; 1562 1563 case DIOCLOCK: 1564 /* 1565 * Nothing to do here, really. 1566 */ 1567 return 0; 1568 1569 case DIOCEJECT: 1570 fd_do_eject(); 1571 return 0; 1572 1573 #ifdef DEBUG 1574 case _IO('f', 100): 1575 { 1576 int i; 1577 struct fdc_softc *fdc = (struct fdc_softc *) 1578 fd->sc_dv.dv_parent; 1579 1580 out_fdc(fdc, NE7CMD_DUMPREG); 1581 fdcresult(fdc); 1582 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1583 for (i = 0; i < fdc->sc_nstat; i++) 1584 printf(" %x", fdc->sc_status[i]); 1585 printf(">\n"); 1586 } 1587 1588 return 0; 1589 case _IOW('f', 101, int): 1590 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg &= 1591 ~CFG_THRHLD_MASK; 1592 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |= 1593 (*(int *)addr & CFG_THRHLD_MASK); 1594 fdconf((struct fdc_softc *) fd->sc_dv.dv_parent); 1595 return 0; 1596 case _IO('f', 102): 1597 { 1598 int i; 1599 struct fdc_softc *fdc = (struct fdc_softc *) 1600 fd->sc_dv.dv_parent; 1601 out_fdc(fdc, NE7CMD_SENSEI); 1602 fdcresult(fdc); 1603 printf("sensei(%d regs): <", fdc->sc_nstat); 1604 for (i=0; i< fdc->sc_nstat; i++) 1605 printf(" 0x%x", fdc->sc_status[i]); 1606 } 1607 printf(">\n"); 1608 return 0; 1609 #endif 1610 default: 1611 return ENOTTY; 1612 } 1613 1614 #ifdef DIAGNOSTIC 1615 panic("fdioctl: impossible"); 1616 #endif 1617 } 1618 1619 void 1620 fdgetdisklabel(dev) 1621 dev_t dev; 1622 { 1623 int unit = FDUNIT(dev), i; 1624 struct fd_softc *fd = fd_cd.cd_devs[unit]; 1625 struct disklabel *lp = fd->sc_dk.dk_label; 1626 struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel; 1627 1628 bzero(lp, sizeof(struct disklabel)); 1629 bzero(lp, sizeof(struct cpu_disklabel)); 1630 1631 lp->d_type = DTYPE_FLOPPY; 1632 lp->d_secsize = FDC_BSIZE; 1633 lp->d_secpercyl = fd->sc_type->seccyl; 1634 lp->d_nsectors = fd->sc_type->sectrac; 1635 lp->d_ncylinders = fd->sc_type->tracks; 1636 lp->d_ntracks = fd->sc_type->heads; /* Go figure... */ 1637 lp->d_rpm = 3600; /* XXX like it matters... */ 1638 1639 strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename)); 1640 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 1641 lp->d_interleave = 1; 1642 1643 lp->d_partitions[RAW_PART].p_offset = 0; 1644 lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders; 1645 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1646 lp->d_npartitions = RAW_PART + 1; 1647 1648 lp->d_magic = DISKMAGIC; 1649 lp->d_magic2 = DISKMAGIC; 1650 lp->d_checksum = dkcksum(lp); 1651 1652 /* 1653 * Call the generic disklabel extraction routine. If there's 1654 * not a label there, fake it. 1655 */ 1656 if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) { 1657 strncpy(lp->d_packname, "default label", 1658 sizeof(lp->d_packname)); 1659 /* 1660 * Reset the partition info; it might have gotten 1661 * trashed in readdisklabel(). 1662 * 1663 * XXX Why do we have to do this? readdisklabel() 1664 * should be safe... 1665 */ 1666 for (i = 0; i < MAXPARTITIONS; ++i) { 1667 lp->d_partitions[i].p_offset = 0; 1668 if (i == RAW_PART) { 1669 lp->d_partitions[i].p_size = 1670 lp->d_secpercyl * lp->d_ncylinders; 1671 lp->d_partitions[i].p_fstype = FS_BSDFFS; 1672 } else { 1673 lp->d_partitions[i].p_size = 0; 1674 lp->d_partitions[i].p_fstype = FS_UNUSED; 1675 } 1676 } 1677 lp->d_npartitions = RAW_PART + 1; 1678 } 1679 } 1680 1681 void 1682 fd_do_eject() 1683 { 1684 1685 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1686 delay(10); 1687 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1688 } 1689 1690 /* ARGSUSED */ 1691 void 1692 fd_mountroot_hook(dev) 1693 struct device *dev; 1694 { 1695 int c; 1696 1697 fd_do_eject(); 1698 printf("Insert filesystem floppy and press return."); 1699 for (;;) { 1700 c = cngetc(); 1701 if ((c == '\r') || (c == '\n')) { 1702 printf("\n"); 1703 return; 1704 } 1705 } 1706 } 1707
Indexes created Fri Oct 03 02:09:57 GMT 2025