fd.c revision 1.28
1 /* $NetBSD: fd.c,v 1.28 1996/03/26 01:28:56 pk Exp $ */ 2 3 /*- 4 * Copyright (c) 1993, 1994, 1995 Charles Hannum. 5 * Copyright (c) 1995 Paul Kranenburg. 6 * Copyright (c) 1990 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Don Ahn. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)fd.c 7.4 (Berkeley) 5/25/91 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/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 int 255 fdcmatch(parent, match, aux) 256 struct device *parent; 257 void *match, *aux; 258 { 259 register struct confargs *ca = aux; 260 register struct romaux *ra = &ca->ca_ra; 261 262 /* 263 * Floppy doesn't exist on sun4. 264 */ 265 if (CPU_ISSUN4) 266 return (0); 267 268 /* 269 * Floppy controller is on mainbus on sun4c. 270 */ 271 if ((CPU_ISSUN4C) && (ca->ca_bustype != BUS_MAIN)) 272 return (0); 273 274 /* 275 * Floppy controller is on obio on sun4m. 276 */ 277 if ((CPU_ISSUN4M) && (ca->ca_bustype != BUS_OBIO)) 278 return (0); 279 280 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 281 if (strcmp(OBP_FDNAME, ra->ra_name)) 282 return (0); 283 284 if (ca->ca_ra.ra_vaddr && 285 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 286 return (0); 287 } 288 289 return (1); 290 } 291 292 /* 293 * Arguments passed between fdcattach and fdprobe. 294 */ 295 struct fdc_attach_args { 296 int fa_drive; 297 int fa_bootdev; 298 struct fd_type *fa_deftype; 299 }; 300 301 /* 302 * Print the location of a disk drive (called just before attaching the 303 * the drive). If `fdc' is not NULL, the drive was found but was not 304 * in the system config file; print the drive name as well. 305 * Return QUIET (config_find ignores this if the device was configured) to 306 * avoid printing `fdN not configured' messages. 307 */ 308 int 309 fdprint(aux, fdc) 310 void *aux; 311 char *fdc; 312 { 313 register struct fdc_attach_args *fa = aux; 314 315 if (!fdc) 316 printf(" drive %d", fa->fa_drive); 317 return QUIET; 318 } 319 320 static void 321 fdconf(fdc) 322 struct fdc_softc *fdc; 323 { 324 int vroom; 325 326 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 327 return; 328 329 /* 330 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 331 * the PROM thinks is appropriate. 332 */ 333 if ((vroom = fdc->sc_status[7]) == 0) 334 vroom = 0x64; 335 336 /* Configure controller to use FIFO and Implied Seek */ 337 out_fdc(fdc, NE7CMD_CFG); 338 out_fdc(fdc, vroom); 339 out_fdc(fdc, fdc->sc_cfg); 340 out_fdc(fdc, 0); /* PRETRK */ 341 /* No result phase */ 342 } 343 344 void 345 fdcattach(parent, self, aux) 346 struct device *parent, *self; 347 void *aux; 348 { 349 register struct confargs *ca = aux; 350 struct fdc_softc *fdc = (void *)self; 351 struct fdc_attach_args fa; 352 struct bootpath *bp; 353 int pri; 354 char code; 355 356 if (ca->ca_ra.ra_vaddr) 357 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 358 else 359 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_reg, 0, 360 ca->ca_ra.ra_len, 361 ca->ca_bustype); 362 363 fdc->sc_state = DEVIDLE; 364 fdc->sc_istate = ISTATE_IDLE; 365 fdc->sc_flags |= FDC_EIS; 366 TAILQ_INIT(&fdc->sc_drives); 367 368 pri = ca->ca_ra.ra_intr[0].int_pri; 369 #ifdef FDC_C_HANDLER 370 fdc->sc_hih.ih_fun = (void *)fdchwintr; 371 fdc->sc_hih.ih_arg = fdc; 372 intr_establish(pri, &fdc->sc_hih); 373 #else 374 fdciop = &fdc->sc_io; 375 intr_fasttrap(pri, fdchwintr); 376 #endif 377 fdc->sc_sih.ih_fun = (void *)fdcswintr; 378 fdc->sc_sih.ih_arg = fdc; 379 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 380 381 /* Assume a 82077 */ 382 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 383 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 384 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 385 386 code = '7'; 387 if (*fdc->sc_reg_dor == NE7_RQM) { 388 /* 389 * This hack from Chris Torek: apparently DOR really 390 * addresses MSR/DRS on a 82072. 391 * We used to rely on the VERSION command to tell the 392 * difference (which did not work). 393 */ 394 *fdc->sc_reg_dor = FDC_250KBPS; 395 if (*fdc->sc_reg_dor == NE7_RQM) 396 code = '2'; 397 } 398 if (code == '7') { 399 fdc->sc_flags |= FDC_82077; 400 } else { 401 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 402 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 403 fdc->sc_reg_dor = 0; 404 } 405 406 #ifdef FD_DEBUG 407 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 408 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 409 if (fdc_debug) 410 printf("[version cmd]"); 411 } 412 #endif 413 414 /* 415 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 416 * Note: CFG_EFIFO is active-low, initial threshold value: 8 417 */ 418 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 419 fdconf(fdc); 420 421 if (fdc->sc_flags & FDC_82077) { 422 /* Lock configuration across soft resets. */ 423 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 424 if (fdcresult(fdc) != 1) 425 printf(" CFGLOCK: unexpected response"); 426 } 427 428 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 429 430 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 431 432 /* 433 * Controller and drives are represented by one and the same 434 * Openprom node, so we can as well check for the floppy boots here. 435 */ 436 fa.fa_bootdev = 0; 437 if ((bp = ca->ca_ra.ra_bp) && strcmp(bp->name, OBP_FDNAME) == 0) { 438 /* 439 * WOAH THERE! It looks like we can get the bootpath 440 * in several different formats!! The faked 441 * bootpath (and some v2?) looks like /fd@0,0 442 * but the real bootpath on some v2 OpenPROM 443 * systems looks like /fd0. In the case of 444 * a floppy controller on obio (such as on the sun4m), 445 * we use "slot, offset" to determine if this is the 446 * right one. --thorpej 447 */ 448 switch (ca->ca_bustype) { 449 case BUS_MAIN: 450 if (((bp->val[0] == 0) && /* /fd@0,0 */ 451 (bp->val[1] == 0)) || 452 ((bp->val[0] == -1) && /* /fd0 */ 453 (bp->val[1] == 0))) 454 fa.fa_bootdev = 1; 455 break; 456 457 case BUS_OBIO: 458 /* /obio0/SUNW,fdtwo@0,700000 */ 459 if ((bp->val[0] == ca->ca_slot) && 460 (bp->val[1] == ca->ca_offset)) 461 fa.fa_bootdev = 1; 462 break; 463 } 464 465 } 466 467 /* physical limit: four drives per controller. */ 468 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 469 fa.fa_deftype = NULL; /* unknown */ 470 fa.fa_deftype = &fd_types[0]; /* XXX */ 471 (void)config_found(self, (void *)&fa, fdprint); 472 } 473 474 bootpath_store(1, NULL); 475 } 476 477 int 478 fdmatch(parent, match, aux) 479 struct device *parent; 480 void *match, *aux; 481 { 482 struct fdc_softc *fdc = (void *)parent; 483 struct fdc_attach_args *fa = aux; 484 int drive = fa->fa_drive; 485 int n; 486 487 if (drive > 0) 488 /* XXX - for now, punt > 1 drives */ 489 return 0; 490 491 if (fdc->sc_flags & FDC_82077) { 492 /* select drive and turn on motor */ 493 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 494 /* wait for motor to spin up */ 495 delay(250000); 496 } else { 497 auxregbisc(AUXIO_FDS, 0); 498 } 499 fdc->sc_nstat = 0; 500 out_fdc(fdc, NE7CMD_RECAL); 501 out_fdc(fdc, drive); 502 /* wait for recalibrate */ 503 for (n = 0; n < 100000; n++) { 504 delay(10); 505 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 506 /* wait a bit longer till device *really* is ready */ 507 delay(100000); 508 if (out_fdc(fdc, NE7CMD_SENSEI)) 509 break; 510 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 511 /* 512 * Got `invalid command'; we interpret it 513 * to mean that the re-calibrate hasn't in 514 * fact finished yet 515 */ 516 continue; 517 break; 518 } 519 } 520 n = fdc->sc_nstat; 521 #ifdef FD_DEBUG 522 if (fdc_debug) { 523 int i; 524 printf("fdprobe: %d stati:", n); 525 for (i = 0; i < n; i++) 526 printf(" %x", fdc->sc_status[i]); 527 printf("\n"); 528 } 529 #endif 530 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 531 return 0; 532 /* turn off motor */ 533 if (fdc->sc_flags & FDC_82077) { 534 /* select drive and turn on motor */ 535 *fdc->sc_reg_dor = FDO_FRST; 536 } else { 537 auxregbisc(0, AUXIO_FDS); 538 } 539 540 return 1; 541 } 542 543 /* 544 * Controller is working, and drive responded. Attach it. 545 */ 546 void 547 fdattach(parent, self, aux) 548 struct device *parent, *self; 549 void *aux; 550 { 551 struct fdc_softc *fdc = (void *)parent; 552 struct fd_softc *fd = (void *)self; 553 struct fdc_attach_args *fa = aux; 554 struct fd_type *type = fa->fa_deftype; 555 int drive = fa->fa_drive; 556 557 /* XXX Allow `flags' to override device type? */ 558 559 if (type) 560 printf(": %s %d cyl, %d head, %d sec\n", type->name, 561 type->tracks, type->heads, type->sectrac); 562 else 563 printf(": density unknown\n"); 564 565 fd->sc_cylin = -1; 566 fd->sc_drive = drive; 567 fd->sc_deftype = type; 568 fdc->sc_fd[drive] = fd; 569 570 /* 571 * Initialize and attach the disk structure. 572 */ 573 fd->sc_dk.dk_name = fd->sc_dv.dv_xname; 574 fd->sc_dk.dk_driver = &fddkdriver; 575 disk_attach(&fd->sc_dk); 576 577 /* 578 * We're told if we're the boot device in fdcattach(). 579 */ 580 if (fa->fa_bootdev) 581 bootdv = &fd->sc_dv; 582 583 /* 584 * Establish a mountroot_hook anyway in case we booted 585 * with RB_ASKNAME and get selected as the boot device. 586 */ 587 mountroot_hook_establish(fd_mountroot_hook, &fd->sc_dv); 588 589 /* Make sure the drive motor gets turned off at shutdown time. */ 590 fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd); 591 592 /* XXX Need to do some more fiddling with sc_dk. */ 593 dk_establish(&fd->sc_dk, &fd->sc_dv); 594 } 595 596 __inline struct fd_type * 597 fd_dev_to_type(fd, dev) 598 struct fd_softc *fd; 599 dev_t dev; 600 { 601 int type = FDTYPE(dev); 602 603 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 604 return NULL; 605 return type ? &fd_types[type - 1] : fd->sc_deftype; 606 } 607 608 void 609 fdstrategy(bp) 610 register struct buf *bp; /* IO operation to perform */ 611 { 612 struct fd_softc *fd; 613 int unit = FDUNIT(bp->b_dev); 614 int sz; 615 int s; 616 617 /* Valid unit, controller, and request? */ 618 if (unit >= fd_cd.cd_ndevs || 619 (fd = fd_cd.cd_devs[unit]) == 0 || 620 bp->b_blkno < 0 || 621 (bp->b_bcount % FDC_BSIZE) != 0) { 622 bp->b_error = EINVAL; 623 goto bad; 624 } 625 626 /* If it's a null transfer, return immediately. */ 627 if (bp->b_bcount == 0) 628 goto done; 629 630 sz = howmany(bp->b_bcount, FDC_BSIZE); 631 632 if (bp->b_blkno + sz > fd->sc_type->size) { 633 sz = fd->sc_type->size - bp->b_blkno; 634 if (sz == 0) { 635 /* If exactly at end of disk, return EOF. */ 636 bp->b_resid = bp->b_bcount; 637 goto done; 638 } 639 if (sz < 0) { 640 /* If past end of disk, return EINVAL. */ 641 bp->b_error = EINVAL; 642 goto bad; 643 } 644 /* Otherwise, truncate request. */ 645 bp->b_bcount = sz << DEV_BSHIFT; 646 } 647 648 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 649 650 #ifdef FD_DEBUG 651 if (fdc_debug > 1) 652 printf("fdstrategy: b_blkno %d b_bcount %ld blkno %d cylin %ld\n", 653 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 654 #endif 655 656 /* Queue transfer on drive, activate drive and controller if idle. */ 657 s = splbio(); 658 disksort(&fd->sc_q, bp); 659 untimeout(fd_motor_off, fd); /* a good idea */ 660 if (!fd->sc_q.b_active) 661 fdstart(fd); 662 #ifdef DIAGNOSTIC 663 else { 664 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 665 if (fdc->sc_state == DEVIDLE) { 666 printf("fdstrategy: controller inactive\n"); 667 fdcstart(fdc); 668 } 669 } 670 #endif 671 splx(s); 672 return; 673 674 bad: 675 bp->b_flags |= B_ERROR; 676 done: 677 /* Toss transfer; we're done early. */ 678 biodone(bp); 679 } 680 681 void 682 fdstart(fd) 683 struct fd_softc *fd; 684 { 685 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 686 int active = fdc->sc_drives.tqh_first != 0; 687 688 /* Link into controller queue. */ 689 fd->sc_q.b_active = 1; 690 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 691 692 /* If controller not already active, start it. */ 693 if (!active) 694 fdcstart(fdc); 695 } 696 697 void 698 fdfinish(fd, bp) 699 struct fd_softc *fd; 700 struct buf *bp; 701 { 702 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 703 704 /* 705 * Move this drive to the end of the queue to give others a `fair' 706 * chance. We only force a switch if N operations are completed while 707 * another drive is waiting to be serviced, since there is a long motor 708 * startup delay whenever we switch. 709 */ 710 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 711 fd->sc_ops = 0; 712 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 713 if (bp->b_actf) { 714 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 715 } else 716 fd->sc_q.b_active = 0; 717 } 718 bp->b_resid = fd->sc_bcount; 719 fd->sc_skip = 0; 720 fd->sc_q.b_actf = bp->b_actf; 721 722 biodone(bp); 723 /* turn off motor 5s from now */ 724 timeout(fd_motor_off, fd, 5 * hz); 725 fdc->sc_state = DEVIDLE; 726 } 727 728 void 729 fdc_reset(fdc) 730 struct fdc_softc *fdc; 731 { 732 if (fdc->sc_flags & FDC_82077) { 733 *fdc->sc_reg_dor = FDO_MOEN(0); 734 } 735 736 *fdc->sc_reg_drs = DRS_RESET; 737 delay(10); 738 *fdc->sc_reg_drs = 0; 739 #ifdef FD_DEBUG 740 if (fdc_debug) 741 printf("fdc reset\n"); 742 #endif 743 } 744 745 void 746 fd_set_motor(fdc) 747 struct fdc_softc *fdc; 748 { 749 struct fd_softc *fd; 750 u_char status; 751 int n; 752 753 if (fdc->sc_flags & FDC_82077) { 754 status = FDO_FRST | FDO_FDMAEN; 755 if ((fd = fdc->sc_drives.tqh_first) != NULL) 756 status |= fd->sc_drive; 757 758 for (n = 0; n < 4; n++) 759 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 760 status |= FDO_MOEN(n); 761 *fdc->sc_reg_dor = status; 762 } else { 763 int on = 0; 764 765 for (n = 0; n < 4; n++) 766 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 767 on = 1; 768 if (on) { 769 auxregbisc(AUXIO_FDS, 0); 770 } else { 771 auxregbisc(0, AUXIO_FDS); 772 } 773 } 774 } 775 776 void 777 fd_motor_off(arg) 778 void *arg; 779 { 780 struct fd_softc *fd = arg; 781 int s; 782 783 s = splbio(); 784 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 785 fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent); 786 splx(s); 787 } 788 789 void 790 fd_motor_on(arg) 791 void *arg; 792 { 793 struct fd_softc *fd = arg; 794 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 795 int s; 796 797 s = splbio(); 798 fd->sc_flags &= ~FD_MOTOR_WAIT; 799 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 800 (void) fdcswintr(fdc); 801 splx(s); 802 } 803 804 int 805 fdcresult(fdc) 806 struct fdc_softc *fdc; 807 { 808 u_char i; 809 int j = 100000, 810 n = 0; 811 812 for (; j; j--) { 813 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 814 if (i == NE7_RQM) 815 return (fdc->sc_nstat = n); 816 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 817 if (n >= sizeof(fdc->sc_status)) { 818 log(LOG_ERR, "fdcresult: overrun\n"); 819 return -1; 820 } 821 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 822 } 823 } 824 log(LOG_ERR, "fdcresult: timeout\n"); 825 return (fdc->sc_nstat = -1); 826 } 827 828 int 829 out_fdc(fdc, x) 830 struct fdc_softc *fdc; 831 u_char x; 832 { 833 int i = 100000; 834 835 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 836 if (i <= 0) 837 return -1; 838 839 *fdc->sc_reg_fifo = x; 840 return 0; 841 } 842 843 int 844 fdopen(dev, flags, fmt, p) 845 dev_t dev; 846 int flags, fmt; 847 struct proc *p; 848 { 849 int unit, pmask; 850 struct fd_softc *fd; 851 struct fd_type *type; 852 853 unit = FDUNIT(dev); 854 if (unit >= fd_cd.cd_ndevs) 855 return ENXIO; 856 fd = fd_cd.cd_devs[unit]; 857 if (fd == 0) 858 return ENXIO; 859 type = fd_dev_to_type(fd, dev); 860 if (type == NULL) 861 return ENXIO; 862 863 if ((fd->sc_flags & FD_OPEN) != 0 && 864 fd->sc_type != type) 865 return EBUSY; 866 867 fd->sc_type = type; 868 fd->sc_cylin = -1; 869 fd->sc_flags |= FD_OPEN; 870 871 /* 872 * Only update the disklabel if we're not open anywhere else. 873 */ 874 if (fd->sc_dk.dk_openmask == 0) 875 fdgetdisklabel(dev); 876 877 pmask = (1 << DISKPART(dev)); 878 879 switch (fmt) { 880 case S_IFCHR: 881 fd->sc_dk.dk_copenmask |= pmask; 882 break; 883 884 case S_IFBLK: 885 fd->sc_dk.dk_bopenmask |= pmask; 886 break; 887 } 888 fd->sc_dk.dk_openmask = 889 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 890 891 return 0; 892 } 893 894 int 895 fdclose(dev, flags, fmt, p) 896 dev_t dev; 897 int flags, fmt; 898 struct proc *p; 899 { 900 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 901 int pmask = (1 << DISKPART(dev)); 902 903 fd->sc_flags &= ~FD_OPEN; 904 905 switch (fmt) { 906 case S_IFCHR: 907 fd->sc_dk.dk_copenmask &= ~pmask; 908 break; 909 910 case S_IFBLK: 911 fd->sc_dk.dk_bopenmask &= ~pmask; 912 break; 913 } 914 fd->sc_dk.dk_openmask = 915 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 916 917 return 0; 918 } 919 920 int 921 fdread(dev, uio, flag) 922 dev_t dev; 923 struct uio *uio; 924 int flag; 925 { 926 927 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 928 } 929 930 int 931 fdwrite(dev, uio, flag) 932 dev_t dev; 933 struct uio *uio; 934 int flag; 935 { 936 937 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 938 } 939 940 void 941 fdcstart(fdc) 942 struct fdc_softc *fdc; 943 { 944 945 #ifdef DIAGNOSTIC 946 /* only got here if controller's drive queue was inactive; should 947 be in idle state */ 948 if (fdc->sc_state != DEVIDLE) { 949 printf("fdcstart: not idle\n"); 950 return; 951 } 952 #endif 953 (void) fdcswintr(fdc); 954 } 955 956 void 957 fdcstatus(dv, n, s) 958 struct device *dv; 959 int n; 960 char *s; 961 { 962 struct fdc_softc *fdc = (void *)dv->dv_parent; 963 #if 0 964 /* 965 * A 82072 seems to return <invalid command> on 966 * gratuitous Sense Interrupt commands. 967 */ 968 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 969 out_fdc(fdc, NE7CMD_SENSEI); 970 (void) fdcresult(fdc); 971 n = 2; 972 } 973 #endif 974 975 /* Just print last status */ 976 n = fdc->sc_nstat; 977 978 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 979 980 switch (n) { 981 case 0: 982 printf("\n"); 983 break; 984 case 2: 985 printf(" (st0 %b cyl %d)\n", 986 (u_int)fdc->sc_status[0], NE7_ST0BITS, 987 fdc->sc_status[1]); 988 break; 989 case 7: 990 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 991 (u_int)fdc->sc_status[0], NE7_ST0BITS, 992 (u_int)fdc->sc_status[1], NE7_ST1BITS, 993 (u_int)fdc->sc_status[2], NE7_ST2BITS, 994 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 995 break; 996 #ifdef DIAGNOSTIC 997 default: 998 printf(" fdcstatus: weird size: %d\n", n); 999 break; 1000 #endif 1001 } 1002 } 1003 1004 void 1005 fdctimeout(arg) 1006 void *arg; 1007 { 1008 struct fdc_softc *fdc = arg; 1009 struct fd_softc *fd = fdc->sc_drives.tqh_first; 1010 int s; 1011 1012 s = splbio(); 1013 fdcstatus(&fd->sc_dv, 0, "timeout"); 1014 1015 if (fd->sc_q.b_actf) 1016 fdc->sc_state++; 1017 else 1018 fdc->sc_state = DEVIDLE; 1019 1020 (void) fdcswintr(fdc); 1021 splx(s); 1022 } 1023 1024 void 1025 fdcpseudointr(arg) 1026 void *arg; 1027 { 1028 struct fdc_softc *fdc = arg; 1029 int s; 1030 1031 /* Just ensure it has the right spl. */ 1032 s = splbio(); 1033 (void) fdcswintr(fdc); 1034 splx(s); 1035 } 1036 1037 1038 #ifdef FDC_C_HANDLER 1039 /* 1040 * hardware interrupt entry point: must be converted to `fast' 1041 * (in-window) handler. 1042 */ 1043 int 1044 fdchwintr(fdc) 1045 struct fdc_softc *fdc; 1046 { 1047 struct buf *bp; 1048 int read; 1049 1050 switch (fdc->sc_istate) { 1051 case ISTATE_SENSEI: 1052 out_fdc(fdc, NE7CMD_SENSEI); 1053 fdcresult(fdc); 1054 fdc->sc_istate = ISTATE_IDLE; 1055 ienab_bis(IE_FDSOFT); 1056 return 1; 1057 case ISTATE_IDLE: 1058 case ISTATE_SPURIOUS: 1059 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 1060 fdcresult(fdc); 1061 fdc->sc_istate = ISTATE_SPURIOUS; 1062 printf("fdc: stray hard interrupt... "); 1063 ienab_bis(IE_FDSOFT); 1064 return 1; 1065 case ISTATE_DMA: 1066 break; 1067 default: 1068 printf("fdc: goofed ...\n"); 1069 return 1; 1070 } 1071 1072 read = bp->b_flags & B_READ; 1073 for (;;) { 1074 register int msr; 1075 1076 msr = *fdc->sc_reg_msr; 1077 1078 if ((msr & NE7_RQM) == 0) 1079 break; 1080 1081 if ((msr & NE7_NDM) == 0) { 1082 fdcresult(fdc); 1083 fdc->sc_istate = ISTATE_IDLE; 1084 ienab_bis(IE_FDSOFT); 1085 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 1086 break; 1087 } 1088 1089 if (msr & NE7_DIO) { 1090 #ifdef DIAGNOSTIC 1091 if (!read) 1092 printf("fdxfer: false read\n"); 1093 #endif 1094 *fdc->sc_data++ = *fdc->sc_reg_fifo; 1095 } else { 1096 #ifdef DIAGNOSTIC 1097 if (read) 1098 printf("fdxfer: false write\n"); 1099 #endif 1100 *fdc->sc_reg_fifo = *fdc->sc_data++; 1101 } 1102 if (--fdc->sc_tc == 0) { 1103 auxregbisc(AUXIO_FTC, 0); 1104 fdc->sc_istate = ISTATE_IDLE; 1105 delay(10); 1106 auxregbisc(0, AUXIO_FTC); 1107 fdcresult(fdc); 1108 ienab_bis(IE_FDSOFT); 1109 break; 1110 } 1111 } 1112 return 1; 1113 } 1114 #endif 1115 1116 int 1117 fdcswintr(fdc) 1118 struct fdc_softc *fdc; 1119 { 1120 #define st0 fdc->sc_status[0] 1121 #define st1 fdc->sc_status[1] 1122 #define cyl fdc->sc_status[1] 1123 #define OUT_FDC(fdc, c, s) \ 1124 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1125 1126 struct fd_softc *fd; 1127 struct buf *bp; 1128 int read, head, sec, nblks; 1129 struct fd_type *type; 1130 1131 1132 if (fdc->sc_istate != ISTATE_IDLE) { 1133 /* Trouble... */ 1134 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1135 fdc->sc_state, fdc->sc_istate); 1136 fdc->sc_istate = ISTATE_IDLE; 1137 if (fdc->sc_state == RESETCOMPLETE || 1138 fdc->sc_state == RESETTIMEDOUT) { 1139 panic("fdcintr: spurious interrupt can't be cleared"); 1140 } 1141 goto doreset; 1142 } 1143 1144 loop: 1145 /* Is there a drive for the controller to do a transfer with? */ 1146 fd = fdc->sc_drives.tqh_first; 1147 if (fd == NULL) { 1148 fdc->sc_state = DEVIDLE; 1149 return 0; 1150 } 1151 1152 /* Is there a transfer to this drive? If not, deactivate drive. */ 1153 bp = fd->sc_q.b_actf; 1154 if (bp == NULL) { 1155 fd->sc_ops = 0; 1156 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1157 fd->sc_q.b_active = 0; 1158 goto loop; 1159 } 1160 1161 switch (fdc->sc_state) { 1162 case DEVIDLE: 1163 fdc->sc_errors = 0; 1164 fd->sc_skip = 0; 1165 fd->sc_bcount = bp->b_bcount; 1166 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1167 untimeout(fd_motor_off, fd); 1168 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1169 fdc->sc_state = MOTORWAIT; 1170 return 1; 1171 } 1172 if ((fd->sc_flags & FD_MOTOR) == 0) { 1173 /* Turn on the motor, being careful about pairing. */ 1174 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1175 if (ofd && ofd->sc_flags & FD_MOTOR) { 1176 untimeout(fd_motor_off, ofd); 1177 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1178 } 1179 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1180 fd_set_motor(fdc); 1181 fdc->sc_state = MOTORWAIT; 1182 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1183 /* Allow .25s for motor to stabilize. */ 1184 timeout(fd_motor_on, fd, hz / 4); 1185 } else { 1186 fd->sc_flags &= ~FD_MOTOR_WAIT; 1187 goto loop; 1188 } 1189 return 1; 1190 } 1191 /* Make sure the right drive is selected. */ 1192 fd_set_motor(fdc); 1193 1194 /* fall through */ 1195 case DOSEEK: 1196 doseek: 1197 if (fdc->sc_flags & FDC_EIS) { 1198 fd->sc_cylin = bp->b_cylin; 1199 /* We use implied seek */ 1200 goto doio; 1201 } 1202 1203 if (fd->sc_cylin == bp->b_cylin) 1204 goto doio; 1205 1206 /* specify command */ 1207 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1208 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1209 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1210 1211 fdc->sc_istate = ISTATE_SENSEI; 1212 /* seek function */ 1213 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1214 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1215 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1216 1217 fd->sc_cylin = -1; 1218 fdc->sc_state = SEEKWAIT; 1219 fdc->sc_nstat = 0; 1220 1221 fd->sc_dk.dk_seek++; 1222 disk_busy(&fd->sc_dk); 1223 1224 timeout(fdctimeout, fdc, 4 * hz); 1225 return 1; 1226 1227 case DOIO: 1228 doio: 1229 type = fd->sc_type; 1230 sec = fd->sc_blkno % type->seccyl; 1231 nblks = type->seccyl - sec; 1232 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1233 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1234 fd->sc_nblks = nblks; 1235 fd->sc_nbytes = nblks * FDC_BSIZE; 1236 head = sec / type->sectrac; 1237 sec -= head * type->sectrac; 1238 #ifdef DIAGNOSTIC 1239 {int block; 1240 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1241 if (block != fd->sc_blkno) { 1242 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1243 #ifdef DDB 1244 Debugger(); 1245 #endif 1246 }} 1247 #endif 1248 read = bp->b_flags & B_READ; 1249 1250 /* Setup for pseudo DMA */ 1251 fdc->sc_data = bp->b_data + fd->sc_skip; 1252 fdc->sc_tc = fd->sc_nbytes; 1253 1254 *fdc->sc_reg_drs = type->rate; 1255 #ifdef FD_DEBUG 1256 if (fdc_debug > 1) 1257 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1258 read ? "read" : "write", fd->sc_drive, 1259 fd->sc_cylin, head, sec, nblks); 1260 #endif 1261 fdc->sc_state = IOCOMPLETE; 1262 fdc->sc_istate = ISTATE_DMA; 1263 fdc->sc_nstat = 0; 1264 if (read) 1265 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1266 else 1267 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1268 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1269 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1270 OUT_FDC(fdc, head, IOTIMEDOUT); 1271 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1272 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1273 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1274 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1275 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1276 1277 disk_busy(&fd->sc_dk); 1278 1279 /* allow 2 seconds for operation */ 1280 timeout(fdctimeout, fdc, 2 * hz); 1281 return 1; /* will return later */ 1282 1283 case SEEKWAIT: 1284 untimeout(fdctimeout, fdc); 1285 fdc->sc_state = SEEKCOMPLETE; 1286 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1287 /* allow 1/50 second for heads to settle */ 1288 timeout(fdcpseudointr, fdc, hz / 50); 1289 return 1; /* will return later */ 1290 } 1291 1292 case SEEKCOMPLETE: 1293 disk_unbusy(&fd->sc_dk, 0); /* no data on seek */ 1294 1295 /* Make sure seek really happened. */ 1296 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1297 cyl != bp->b_cylin * fd->sc_type->step) { 1298 #ifdef FD_DEBUG 1299 if (fdc_debug) 1300 fdcstatus(&fd->sc_dv, 2, "seek failed"); 1301 #endif 1302 fdcretry(fdc); 1303 goto loop; 1304 } 1305 fd->sc_cylin = bp->b_cylin; 1306 goto doio; 1307 1308 case IOTIMEDOUT: 1309 auxregbisc(AUXIO_FTC, 0); 1310 delay(10); 1311 auxregbisc(0, AUXIO_FTC); 1312 (void)fdcresult(fdc); 1313 case SEEKTIMEDOUT: 1314 case RECALTIMEDOUT: 1315 case RESETTIMEDOUT: 1316 fdcretry(fdc); 1317 goto loop; 1318 1319 case IOCOMPLETE: /* IO DONE, post-analyze */ 1320 untimeout(fdctimeout, fdc); 1321 1322 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid)); 1323 1324 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1325 #ifdef FD_DEBUG 1326 if (fdc_debug) { 1327 fdcstatus(&fd->sc_dv, 7, 1328 bp->b_flags & B_READ 1329 ? "read failed" : "write failed"); 1330 printf("blkno %d nblks %d tc %d\n", 1331 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1332 } 1333 #endif 1334 if (fdc->sc_nstat == 7 && 1335 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1336 1337 /* 1338 * Silently retry overruns if no other 1339 * error bit is set. Adjust threshold. 1340 */ 1341 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1342 if (thr < 15) { 1343 thr++; 1344 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1345 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1346 #ifdef FD_DEBUG 1347 if (fdc_debug) 1348 printf("fdc: %d -> threshold\n", thr); 1349 #endif 1350 fdconf(fdc); 1351 fdc->sc_state = DOIO; 1352 fdc->sc_overruns = 0; 1353 } 1354 if (++fdc->sc_overruns < 3) 1355 goto loop; 1356 } 1357 fdcretry(fdc); 1358 goto loop; 1359 } 1360 if (fdc->sc_errors) { 1361 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1362 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1363 printf("\n"); 1364 fdc->sc_errors = 0; 1365 } else { 1366 if (--fdc->sc_overruns < -20) { 1367 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1368 if (thr > 0) { 1369 thr--; 1370 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1371 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1372 #ifdef FD_DEBUG 1373 if (fdc_debug) 1374 printf("fdc: %d -> threshold\n", thr); 1375 #endif 1376 fdconf(fdc); 1377 } 1378 fdc->sc_overruns = 0; 1379 } 1380 } 1381 fd->sc_blkno += fd->sc_nblks; 1382 fd->sc_skip += fd->sc_nbytes; 1383 fd->sc_bcount -= fd->sc_nbytes; 1384 if (fd->sc_bcount > 0) { 1385 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1386 goto doseek; 1387 } 1388 fdfinish(fd, bp); 1389 goto loop; 1390 1391 case DORESET: 1392 doreset: 1393 /* try a reset, keep motor on */ 1394 fd_set_motor(fdc); 1395 delay(100); 1396 fdc_reset(fdc); 1397 fdc->sc_nstat = 0; 1398 fdc->sc_istate = ISTATE_SENSEI; 1399 fdc->sc_state = RESETCOMPLETE; 1400 timeout(fdctimeout, fdc, hz / 2); 1401 return 1; /* will return later */ 1402 1403 case RESETCOMPLETE: 1404 untimeout(fdctimeout, fdc); 1405 fdconf(fdc); 1406 1407 /* fall through */ 1408 case DORECAL: 1409 fdc->sc_state = RECALWAIT; 1410 fdc->sc_istate = ISTATE_SENSEI; 1411 fdc->sc_nstat = 0; 1412 /* recalibrate function */ 1413 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1414 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1415 timeout(fdctimeout, fdc, 5 * hz); 1416 return 1; /* will return later */ 1417 1418 case RECALWAIT: 1419 untimeout(fdctimeout, fdc); 1420 fdc->sc_state = RECALCOMPLETE; 1421 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1422 /* allow 1/30 second for heads to settle */ 1423 timeout(fdcpseudointr, fdc, hz / 30); 1424 return 1; /* will return later */ 1425 } 1426 1427 case RECALCOMPLETE: 1428 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1429 #ifdef FD_DEBUG 1430 if (fdc_debug) 1431 fdcstatus(&fd->sc_dv, 2, "recalibrate failed"); 1432 #endif 1433 fdcretry(fdc); 1434 goto loop; 1435 } 1436 fd->sc_cylin = 0; 1437 goto doseek; 1438 1439 case MOTORWAIT: 1440 if (fd->sc_flags & FD_MOTOR_WAIT) 1441 return 1; /* time's not up yet */ 1442 goto doseek; 1443 1444 default: 1445 fdcstatus(&fd->sc_dv, 0, "stray interrupt"); 1446 return 1; 1447 } 1448 #ifdef DIAGNOSTIC 1449 panic("fdcintr: impossible"); 1450 #endif 1451 #undef st0 1452 #undef st1 1453 #undef cyl 1454 } 1455 1456 void 1457 fdcretry(fdc) 1458 struct fdc_softc *fdc; 1459 { 1460 struct fd_softc *fd; 1461 struct buf *bp; 1462 1463 fd = fdc->sc_drives.tqh_first; 1464 bp = fd->sc_q.b_actf; 1465 1466 fdc->sc_overruns = 0; 1467 1468 switch (fdc->sc_errors) { 1469 case 0: 1470 /* try again */ 1471 fdc->sc_state = 1472 (fdc->sc_flags & FDC_EIS) ? DOIO : DOSEEK; 1473 break; 1474 1475 case 1: case 2: case 3: 1476 /* didn't work; try recalibrating */ 1477 fdc->sc_state = DORECAL; 1478 break; 1479 1480 case 4: 1481 /* still no go; reset the bastard */ 1482 fdc->sc_state = DORESET; 1483 break; 1484 1485 default: 1486 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1487 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1488 1489 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 1490 (u_int)fdc->sc_status[0], NE7_ST0BITS, 1491 (u_int)fdc->sc_status[1], NE7_ST1BITS, 1492 (u_int)fdc->sc_status[2], NE7_ST2BITS, 1493 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1494 1495 bp->b_flags |= B_ERROR; 1496 bp->b_error = EIO; 1497 fdfinish(fd, bp); 1498 } 1499 fdc->sc_errors++; 1500 } 1501 1502 int 1503 fdsize(dev) 1504 dev_t dev; 1505 { 1506 1507 /* Swapping to floppies would not make sense. */ 1508 return -1; 1509 } 1510 1511 int 1512 fddump(dev, blkno, va, size) 1513 dev_t dev; 1514 daddr_t blkno; 1515 caddr_t va; 1516 size_t size; 1517 { 1518 1519 /* Not implemented. */ 1520 return EINVAL; 1521 } 1522 1523 int 1524 fdioctl(dev, cmd, addr, flag, p) 1525 dev_t dev; 1526 u_long cmd; 1527 caddr_t addr; 1528 int flag; 1529 struct proc *p; 1530 { 1531 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 1532 int error; 1533 1534 switch (cmd) { 1535 case DIOCGDINFO: 1536 *(struct disklabel *)addr = *(fd->sc_dk.dk_label); 1537 return 0; 1538 1539 case DIOCWLABEL: 1540 if ((flag & FWRITE) == 0) 1541 return EBADF; 1542 /* XXX do something */ 1543 return 0; 1544 1545 case DIOCWDINFO: 1546 if ((flag & FWRITE) == 0) 1547 return EBADF; 1548 1549 error = setdisklabel(fd->sc_dk.dk_label, 1550 (struct disklabel *)addr, 0, 1551 fd->sc_dk.dk_cpulabel); 1552 if (error) 1553 return error; 1554 1555 error = writedisklabel(dev, fdstrategy, 1556 fd->sc_dk.dk_label, 1557 fd->sc_dk.dk_cpulabel); 1558 return error; 1559 1560 case DIOCLOCK: 1561 /* 1562 * Nothing to do here, really. 1563 */ 1564 return 0; 1565 1566 case DIOCEJECT: 1567 fd_do_eject(); 1568 return 0; 1569 1570 #ifdef DEBUG 1571 case _IO('f', 100): 1572 { 1573 int i; 1574 struct fdc_softc *fdc = (struct fdc_softc *) 1575 fd->sc_dv.dv_parent; 1576 1577 out_fdc(fdc, NE7CMD_DUMPREG); 1578 fdcresult(fdc); 1579 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1580 for (i = 0; i < fdc->sc_nstat; i++) 1581 printf(" %x", fdc->sc_status[i]); 1582 printf(">\n"); 1583 } 1584 1585 return 0; 1586 case _IOW('f', 101, int): 1587 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg &= 1588 ~CFG_THRHLD_MASK; 1589 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |= 1590 (*(int *)addr & CFG_THRHLD_MASK); 1591 fdconf((struct fdc_softc *) fd->sc_dv.dv_parent); 1592 return 0; 1593 case _IO('f', 102): 1594 { 1595 int i; 1596 struct fdc_softc *fdc = (struct fdc_softc *) 1597 fd->sc_dv.dv_parent; 1598 out_fdc(fdc, NE7CMD_SENSEI); 1599 fdcresult(fdc); 1600 printf("sensei(%d regs): <", fdc->sc_nstat); 1601 for (i=0; i< fdc->sc_nstat; i++) 1602 printf(" 0x%x", fdc->sc_status[i]); 1603 } 1604 printf(">\n"); 1605 return 0; 1606 #endif 1607 default: 1608 return ENOTTY; 1609 } 1610 1611 #ifdef DIAGNOSTIC 1612 panic("fdioctl: impossible"); 1613 #endif 1614 } 1615 1616 void 1617 fdgetdisklabel(dev) 1618 dev_t dev; 1619 { 1620 int unit = FDUNIT(dev), i; 1621 struct fd_softc *fd = fd_cd.cd_devs[unit]; 1622 struct disklabel *lp = fd->sc_dk.dk_label; 1623 struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel; 1624 1625 bzero(lp, sizeof(struct disklabel)); 1626 bzero(lp, sizeof(struct cpu_disklabel)); 1627 1628 lp->d_type = DTYPE_FLOPPY; 1629 lp->d_secsize = FDC_BSIZE; 1630 lp->d_secpercyl = fd->sc_type->seccyl; 1631 lp->d_nsectors = fd->sc_type->sectrac; 1632 lp->d_ncylinders = fd->sc_type->tracks; 1633 lp->d_ntracks = fd->sc_type->heads; /* Go figure... */ 1634 lp->d_rpm = 3600; /* XXX like it matters... */ 1635 1636 strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename)); 1637 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 1638 lp->d_interleave = 1; 1639 1640 lp->d_partitions[RAW_PART].p_offset = 0; 1641 lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders; 1642 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1643 lp->d_npartitions = RAW_PART + 1; 1644 1645 lp->d_magic = DISKMAGIC; 1646 lp->d_magic2 = DISKMAGIC; 1647 lp->d_checksum = dkcksum(lp); 1648 1649 /* 1650 * Call the generic disklabel extraction routine. If there's 1651 * not a label there, fake it. 1652 */ 1653 if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) { 1654 strncpy(lp->d_packname, "default label", 1655 sizeof(lp->d_packname)); 1656 /* 1657 * Reset the partition info; it might have gotten 1658 * trashed in readdisklabel(). 1659 * 1660 * XXX Why do we have to do this? readdisklabel() 1661 * should be safe... 1662 */ 1663 for (i = 0; i < MAXPARTITIONS; ++i) { 1664 lp->d_partitions[i].p_offset = 0; 1665 if (i == RAW_PART) { 1666 lp->d_partitions[i].p_size = 1667 lp->d_secpercyl * lp->d_ncylinders; 1668 lp->d_partitions[i].p_fstype = FS_BSDFFS; 1669 } else { 1670 lp->d_partitions[i].p_size = 0; 1671 lp->d_partitions[i].p_fstype = FS_UNUSED; 1672 } 1673 } 1674 lp->d_npartitions = RAW_PART + 1; 1675 } 1676 } 1677 1678 void 1679 fd_do_eject() 1680 { 1681 1682 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1683 delay(10); 1684 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1685 } 1686 1687 /* ARGSUSED */ 1688 void 1689 fd_mountroot_hook(dev) 1690 struct device *dev; 1691 { 1692 int c; 1693 1694 fd_do_eject(); 1695 printf("Insert filesystem floppy and press return."); 1696 for (;;) { 1697 c = cngetc(); 1698 if ((c == '\r') || (c == '\n')) { 1699 printf("\n"); 1700 return; 1701 } 1702 } 1703 } 1704
Indexes created Fri Oct 03 02:09:57 GMT 2025