fd.c revision 1.25
1 /* $NetBSD: fd.c,v 1.25 1996/03/16 23:28:33 christos 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 *)); 133 134 135 struct cfdriver fdccd = { 136 NULL, "fdc", fdcmatch, fdcattach, DV_DULL, sizeof(struct fdc_softc) 137 }; 138 139 __inline struct fd_type *fd_dev_to_type __P((struct fd_softc *, dev_t)); 140 141 /* 142 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 143 * we tell them apart. 144 */ 145 struct fd_type { 146 int sectrac; /* sectors per track */ 147 int heads; /* number of heads */ 148 int seccyl; /* sectors per cylinder */ 149 int secsize; /* size code for sectors */ 150 int datalen; /* data len when secsize = 0 */ 151 int steprate; /* step rate and head unload time */ 152 int gap1; /* gap len between sectors */ 153 int gap2; /* formatting gap */ 154 int tracks; /* total num of tracks */ 155 int size; /* size of disk in sectors */ 156 int step; /* steps per cylinder */ 157 int rate; /* transfer speed code */ 158 char *name; 159 }; 160 161 /* The order of entries in the following table is important -- BEWARE! */ 162 struct fd_type fd_types[] = { 163 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */ 164 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,"1.2MB" }, /* 1.2 MB AT-diskettes */ 165 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,"360KB/AT" }, /* 360kB in 1.2MB drive */ 166 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,"360KB/PC" }, /* 360kB PC diskettes */ 167 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,"720KB" }, /* 3.5" 720kB diskette */ 168 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,"720KB/x" }, /* 720kB in 1.2MB drive */ 169 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,"360KB/x" }, /* 360kB in 720kB drive */ 170 }; 171 172 /* software state, per disk (with up to 4 disks per ctlr) */ 173 struct fd_softc { 174 struct device sc_dv; /* generic device info */ 175 struct disk sc_dk; /* generic disk info */ 176 177 struct fd_type *sc_deftype; /* default type descriptor */ 178 struct fd_type *sc_type; /* current type descriptor */ 179 180 daddr_t sc_blkno; /* starting block number */ 181 int sc_bcount; /* byte count left */ 182 int sc_skip; /* bytes already transferred */ 183 int sc_nblks; /* number of blocks currently tranferring */ 184 int sc_nbytes; /* number of bytes currently tranferring */ 185 186 int sc_drive; /* physical unit number */ 187 int sc_flags; 188 #define FD_OPEN 0x01 /* it's open */ 189 #define FD_MOTOR 0x02 /* motor should be on */ 190 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 191 int sc_cylin; /* where we think the head is */ 192 193 void *sc_sdhook; /* shutdownhook cookie */ 194 195 TAILQ_ENTRY(fd_softc) sc_drivechain; 196 int sc_ops; /* I/O ops since last switch */ 197 struct buf sc_q; /* head of buf chain */ 198 }; 199 200 /* floppy driver configuration */ 201 int fdmatch __P((struct device *, void *, void *)); 202 void fdattach __P((struct device *, struct device *, void *)); 203 204 struct cfdriver fdcd = { 205 NULL, "fd", fdmatch, fdattach, DV_DISK, sizeof(struct fd_softc) 206 }; 207 208 void fdgetdisklabel __P((dev_t)); 209 int fd_get_parms __P((struct fd_softc *)); 210 void fdstrategy __P((struct buf *)); 211 void fdstart __P((struct fd_softc *)); 212 int fdprint __P((void *, char *)); 213 214 struct dkdriver fddkdriver = { fdstrategy }; 215 216 struct fd_type *fd_nvtotype __P((char *, int, int)); 217 void fd_set_motor __P((struct fdc_softc *fdc)); 218 void fd_motor_off __P((void *arg)); 219 void fd_motor_on __P((void *arg)); 220 int fdcresult __P((struct fdc_softc *fdc)); 221 int out_fdc __P((struct fdc_softc *fdc, u_char x)); 222 void fdcstart __P((struct fdc_softc *fdc)); 223 void fdcstatus __P((struct device *dv, int n, char *s)); 224 void fdc_reset __P((struct fdc_softc *fdc)); 225 void fdctimeout __P((void *arg)); 226 void fdcpseudointr __P((void *arg)); 227 #ifdef FDC_C_HANDLER 228 int fdchwintr __P((struct fdc_softc *)); 229 #else 230 void fdchwintr __P((void)); 231 #endif 232 int fdcswintr __P((struct fdc_softc *)); 233 void fdcretry __P((struct fdc_softc *fdc)); 234 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 235 void fd_do_eject __P((void)); 236 void fd_mountroot_hook __P((struct device *)); 237 static void fdconf __P((struct fdc_softc *)); 238 239 #if PIL_FDSOFT == 4 240 #define IE_FDSOFT IE_L4 241 #else 242 #error 4 243 #endif 244 245 #define OBP_FDNAME (CPU_ISSUN4M ? "SUNW,fdtwo" : "fd") 246 247 static const char fmt1[] = " (st0 %b cyl %d)\n"; 248 static const char fmt2[] = " (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n"; 249 250 int 251 fdcmatch(parent, match, aux) 252 struct device *parent; 253 void *match, *aux; 254 { 255 register struct confargs *ca = aux; 256 register struct romaux *ra = &ca->ca_ra; 257 258 /* 259 * Floppy doesn't exist on sun4. 260 */ 261 if (CPU_ISSUN4) 262 return (0); 263 264 /* 265 * Floppy controller is on mainbus on sun4c. 266 */ 267 if ((CPU_ISSUN4C) && (ca->ca_bustype != BUS_MAIN)) 268 return (0); 269 270 /* 271 * Floppy controller is on obio on sun4m. 272 */ 273 if ((CPU_ISSUN4M) && (ca->ca_bustype != BUS_OBIO)) 274 return (0); 275 276 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 277 if (strcmp(OBP_FDNAME, ra->ra_name)) 278 return (0); 279 280 if (ca->ca_ra.ra_vaddr && 281 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 282 return (0); 283 } 284 285 return (1); 286 } 287 288 /* 289 * Arguments passed between fdcattach and fdprobe. 290 */ 291 struct fdc_attach_args { 292 int fa_drive; 293 int fa_bootdev; 294 struct fd_type *fa_deftype; 295 }; 296 297 /* 298 * Print the location of a disk drive (called just before attaching the 299 * the drive). If `fdc' is not NULL, the drive was found but was not 300 * in the system config file; print the drive name as well. 301 * Return QUIET (config_find ignores this if the device was configured) to 302 * avoid printing `fdN not configured' messages. 303 */ 304 int 305 fdprint(aux, fdc) 306 void *aux; 307 char *fdc; 308 { 309 register struct fdc_attach_args *fa = aux; 310 311 if (!fdc) 312 printf(" drive %d", fa->fa_drive); 313 return QUIET; 314 } 315 316 static void 317 fdconf(fdc) 318 struct fdc_softc *fdc; 319 { 320 int vroom; 321 322 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 323 return; 324 325 /* 326 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 327 * the PROM thinks is appropriate. 328 */ 329 if ((vroom = fdc->sc_status[7]) == 0) 330 vroom = 0x64; 331 332 /* Configure controller to use FIFO and Implied Seek */ 333 out_fdc(fdc, NE7CMD_CFG); 334 out_fdc(fdc, vroom); 335 out_fdc(fdc, fdc->sc_cfg); 336 out_fdc(fdc, 0); /* PRETRK */ 337 /* No result phase */ 338 } 339 340 void 341 fdcattach(parent, self, aux) 342 struct device *parent, *self; 343 void *aux; 344 { 345 register struct confargs *ca = aux; 346 struct fdc_softc *fdc = (void *)self; 347 struct fdc_attach_args fa; 348 struct bootpath *bp; 349 int pri; 350 char code; 351 352 if (ca->ca_ra.ra_vaddr) 353 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 354 else 355 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_reg, 0, 356 ca->ca_ra.ra_len, 357 ca->ca_bustype); 358 359 fdc->sc_state = DEVIDLE; 360 fdc->sc_istate = ISTATE_IDLE; 361 fdc->sc_flags |= FDC_EIS; 362 TAILQ_INIT(&fdc->sc_drives); 363 364 pri = ca->ca_ra.ra_intr[0].int_pri; 365 #ifdef FDC_C_HANDLER 366 fdc->sc_hih.ih_fun = (void *)fdchwintr; 367 fdc->sc_hih.ih_arg = fdc; 368 intr_establish(pri, &fdc->sc_hih); 369 #else 370 fdciop = &fdc->sc_io; 371 intr_fasttrap(pri, fdchwintr); 372 #endif 373 fdc->sc_sih.ih_fun = (void *)fdcswintr; 374 fdc->sc_sih.ih_arg = fdc; 375 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 376 377 /* Assume a 82077 */ 378 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 379 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 380 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 381 382 code = '7'; 383 if (*fdc->sc_reg_dor == NE7_RQM) { 384 /* 385 * This hack from Chris Torek: apparently DOR really 386 * addresses MSR/DRS on a 82072. 387 * We used to rely on the VERSION command to tell the 388 * difference (which did not work). 389 */ 390 *fdc->sc_reg_dor = FDC_250KBPS; 391 if (*fdc->sc_reg_dor == NE7_RQM) 392 code = '2'; 393 } 394 if (code == '7') { 395 fdc->sc_flags |= FDC_82077; 396 } else { 397 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 398 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 399 fdc->sc_reg_dor = 0; 400 } 401 402 #ifdef FD_DEBUG 403 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 404 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 405 if (fdc_debug) 406 printf("[version cmd]"); 407 } 408 #endif 409 410 /* 411 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 412 * Note: CFG_EFIFO is active-low, initial threshold value: 8 413 */ 414 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 415 fdconf(fdc); 416 417 if (fdc->sc_flags & FDC_82077) { 418 /* Lock configuration across soft resets. */ 419 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 420 if (fdcresult(fdc) != 1) 421 printf(" CFGLOCK: unexpected response"); 422 } 423 424 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 425 426 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 427 428 /* 429 * Controller and drives are represented by one and the same 430 * Openprom node, so we can as well check for the floppy boots here. 431 */ 432 fa.fa_bootdev = 0; 433 if ((bp = ca->ca_ra.ra_bp) && strcmp(bp->name, OBP_FDNAME) == 0) { 434 /* 435 * WOAH THERE! It looks like we can get the bootpath 436 * in several different formats!! The faked 437 * bootpath (and some v2?) looks like /fd@0,0 438 * but the real bootpath on some v2 OpenPROM 439 * systems looks like /fd0. In the case of 440 * a floppy controller on obio (such as on the sun4m), 441 * we use "slot, offset" to determine if this is the 442 * right one. --thorpej 443 */ 444 switch (ca->ca_bustype) { 445 case BUS_MAIN: 446 if (((bp->val[0] == 0) && /* /fd@0,0 */ 447 (bp->val[1] == 0)) || 448 ((bp->val[0] == -1) && /* /fd0 */ 449 (bp->val[1] == 0))) 450 fa.fa_bootdev = 1; 451 break; 452 453 case BUS_OBIO: 454 /* /obio0/SUNW,fdtwo@0,700000 */ 455 if ((bp->val[0] == ca->ca_slot) && 456 (bp->val[1] == ca->ca_offset)) 457 fa.fa_bootdev = 1; 458 break; 459 } 460 461 } 462 463 /* physical limit: four drives per controller. */ 464 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 465 fa.fa_deftype = NULL; /* unknown */ 466 fa.fa_deftype = &fd_types[0]; /* XXX */ 467 (void)config_found(self, (void *)&fa, fdprint); 468 } 469 470 bootpath_store(1, NULL); 471 } 472 473 int 474 fdmatch(parent, match, aux) 475 struct device *parent; 476 void *match, *aux; 477 { 478 struct fdc_softc *fdc = (void *)parent; 479 struct fdc_attach_args *fa = aux; 480 int drive = fa->fa_drive; 481 int n; 482 483 if (drive > 0) 484 /* XXX - for now, punt > 1 drives */ 485 return 0; 486 487 if (fdc->sc_flags & FDC_82077) { 488 /* select drive and turn on motor */ 489 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 490 /* wait for motor to spin up */ 491 delay(250000); 492 } else { 493 auxregbisc(AUXIO_FDS, 0); 494 } 495 fdc->sc_nstat = 0; 496 out_fdc(fdc, NE7CMD_RECAL); 497 out_fdc(fdc, drive); 498 /* wait for recalibrate */ 499 for (n = 0; n < 100000; n++) { 500 delay(10); 501 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 502 /* wait a bit longer till device *really* is ready */ 503 delay(100000); 504 if (out_fdc(fdc, NE7CMD_SENSEI)) 505 break; 506 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 507 /* 508 * Got `invalid command'; we interpret it 509 * to mean that the re-calibrate hasn't in 510 * fact finished yet 511 */ 512 continue; 513 break; 514 } 515 } 516 n = fdc->sc_nstat; 517 #ifdef FD_DEBUG 518 if (fdc_debug) { 519 int i; 520 printf("fdprobe: %d stati:", n); 521 for (i = 0; i < n; i++) 522 printf(" %x", fdc->sc_status[i]); 523 printf("\n"); 524 } 525 #endif 526 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 527 return 0; 528 /* turn off motor */ 529 if (fdc->sc_flags & FDC_82077) { 530 /* select drive and turn on motor */ 531 *fdc->sc_reg_dor = FDO_FRST; 532 } else { 533 auxregbisc(0, AUXIO_FDS); 534 } 535 536 return 1; 537 } 538 539 /* 540 * Controller is working, and drive responded. Attach it. 541 */ 542 void 543 fdattach(parent, self, aux) 544 struct device *parent, *self; 545 void *aux; 546 { 547 struct fdc_softc *fdc = (void *)parent; 548 struct fd_softc *fd = (void *)self; 549 struct fdc_attach_args *fa = aux; 550 struct fd_type *type = fa->fa_deftype; 551 int drive = fa->fa_drive; 552 553 /* XXX Allow `flags' to override device type? */ 554 555 if (type) 556 printf(": %s %d cyl, %d head, %d sec\n", type->name, 557 type->tracks, type->heads, type->sectrac); 558 else 559 printf(": density unknown\n"); 560 561 fd->sc_cylin = -1; 562 fd->sc_drive = drive; 563 fd->sc_deftype = type; 564 fdc->sc_fd[drive] = fd; 565 566 /* 567 * Initialize and attach the disk structure. 568 */ 569 fd->sc_dk.dk_name = fd->sc_dv.dv_xname; 570 fd->sc_dk.dk_driver = &fddkdriver; 571 disk_attach(&fd->sc_dk); 572 573 /* 574 * We're told if we're the boot device in fdcattach(). 575 */ 576 if (fa->fa_bootdev) 577 bootdv = &fd->sc_dv; 578 579 /* 580 * Establish a mountroot_hook anyway in case we booted 581 * with RB_ASKNAME and get selected as the boot device. 582 */ 583 mountroot_hook_establish(fd_mountroot_hook, &fd->sc_dv); 584 585 /* Make sure the drive motor gets turned off at shutdown time. */ 586 fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd); 587 588 /* XXX Need to do some more fiddling with sc_dk. */ 589 dk_establish(&fd->sc_dk, &fd->sc_dv); 590 } 591 592 __inline struct fd_type * 593 fd_dev_to_type(fd, dev) 594 struct fd_softc *fd; 595 dev_t dev; 596 { 597 int type = FDTYPE(dev); 598 599 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 600 return NULL; 601 return type ? &fd_types[type - 1] : fd->sc_deftype; 602 } 603 604 void 605 fdstrategy(bp) 606 register struct buf *bp; /* IO operation to perform */ 607 { 608 struct fd_softc *fd; 609 int unit = FDUNIT(bp->b_dev); 610 int sz; 611 int s; 612 613 /* Valid unit, controller, and request? */ 614 if (unit >= fdcd.cd_ndevs || 615 (fd = fdcd.cd_devs[unit]) == 0 || 616 bp->b_blkno < 0 || 617 (bp->b_bcount % FDC_BSIZE) != 0) { 618 bp->b_error = EINVAL; 619 goto bad; 620 } 621 622 /* If it's a null transfer, return immediately. */ 623 if (bp->b_bcount == 0) 624 goto done; 625 626 sz = howmany(bp->b_bcount, FDC_BSIZE); 627 628 if (bp->b_blkno + sz > fd->sc_type->size) { 629 sz = fd->sc_type->size - bp->b_blkno; 630 if (sz == 0) { 631 /* If exactly at end of disk, return EOF. */ 632 bp->b_resid = bp->b_bcount; 633 goto done; 634 } 635 if (sz < 0) { 636 /* If past end of disk, return EINVAL. */ 637 bp->b_error = EINVAL; 638 goto bad; 639 } 640 /* Otherwise, truncate request. */ 641 bp->b_bcount = sz << DEV_BSHIFT; 642 } 643 644 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 645 646 #ifdef FD_DEBUG 647 if (fdc_debug > 1) 648 printf("fdstrategy: b_blkno %d b_bcount %ld blkno %d cylin %ld\n", 649 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 650 #endif 651 652 /* Queue transfer on drive, activate drive and controller if idle. */ 653 s = splbio(); 654 disksort(&fd->sc_q, bp); 655 untimeout(fd_motor_off, fd); /* a good idea */ 656 if (!fd->sc_q.b_active) 657 fdstart(fd); 658 #ifdef DIAGNOSTIC 659 else { 660 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 661 if (fdc->sc_state == DEVIDLE) { 662 printf("fdstrategy: controller inactive\n"); 663 fdcstart(fdc); 664 } 665 } 666 #endif 667 splx(s); 668 return; 669 670 bad: 671 bp->b_flags |= B_ERROR; 672 done: 673 /* Toss transfer; we're done early. */ 674 biodone(bp); 675 } 676 677 void 678 fdstart(fd) 679 struct fd_softc *fd; 680 { 681 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 682 int active = fdc->sc_drives.tqh_first != 0; 683 684 /* Link into controller queue. */ 685 fd->sc_q.b_active = 1; 686 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 687 688 /* If controller not already active, start it. */ 689 if (!active) 690 fdcstart(fdc); 691 } 692 693 void 694 fdfinish(fd, bp) 695 struct fd_softc *fd; 696 struct buf *bp; 697 { 698 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 699 700 /* 701 * Move this drive to the end of the queue to give others a `fair' 702 * chance. We only force a switch if N operations are completed while 703 * another drive is waiting to be serviced, since there is a long motor 704 * startup delay whenever we switch. 705 */ 706 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 707 fd->sc_ops = 0; 708 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 709 if (bp->b_actf) { 710 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 711 } else 712 fd->sc_q.b_active = 0; 713 } 714 bp->b_resid = fd->sc_bcount; 715 fd->sc_skip = 0; 716 fd->sc_q.b_actf = bp->b_actf; 717 718 biodone(bp); 719 /* turn off motor 5s from now */ 720 timeout(fd_motor_off, fd, 5 * hz); 721 fdc->sc_state = DEVIDLE; 722 } 723 724 void 725 fdc_reset(fdc) 726 struct fdc_softc *fdc; 727 { 728 if (fdc->sc_flags & FDC_82077) { 729 *fdc->sc_reg_dor = FDO_MOEN(0); 730 } 731 732 *fdc->sc_reg_drs = DRS_RESET; 733 delay(10); 734 *fdc->sc_reg_drs = 0; 735 #ifdef FD_DEBUG 736 if (fdc_debug) 737 printf("fdc reset\n"); 738 #endif 739 } 740 741 void 742 fd_set_motor(fdc) 743 struct fdc_softc *fdc; 744 { 745 struct fd_softc *fd; 746 u_char status; 747 int n; 748 749 if (fdc->sc_flags & FDC_82077) { 750 status = FDO_FRST | FDO_FDMAEN; 751 if ((fd = fdc->sc_drives.tqh_first) != NULL) 752 status |= fd->sc_drive; 753 754 for (n = 0; n < 4; n++) 755 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 756 status |= FDO_MOEN(n); 757 *fdc->sc_reg_dor = status; 758 } else { 759 int on = 0; 760 761 for (n = 0; n < 4; n++) 762 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 763 on = 1; 764 if (on) { 765 auxregbisc(AUXIO_FDS, 0); 766 } else { 767 auxregbisc(0, AUXIO_FDS); 768 } 769 } 770 } 771 772 void 773 fd_motor_off(arg) 774 void *arg; 775 { 776 struct fd_softc *fd = arg; 777 int s; 778 779 s = splbio(); 780 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 781 fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent); 782 splx(s); 783 } 784 785 void 786 fd_motor_on(arg) 787 void *arg; 788 { 789 struct fd_softc *fd = arg; 790 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 791 int s; 792 793 s = splbio(); 794 fd->sc_flags &= ~FD_MOTOR_WAIT; 795 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 796 (void) fdcswintr(fdc); 797 splx(s); 798 } 799 800 int 801 fdcresult(fdc) 802 struct fdc_softc *fdc; 803 { 804 u_char i; 805 int j = 100000, 806 n = 0; 807 808 for (; j; j--) { 809 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 810 if (i == NE7_RQM) 811 return (fdc->sc_nstat = n); 812 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 813 if (n >= sizeof(fdc->sc_status)) { 814 log(LOG_ERR, "fdcresult: overrun\n"); 815 return -1; 816 } 817 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 818 } 819 } 820 log(LOG_ERR, "fdcresult: timeout\n"); 821 return (fdc->sc_nstat = -1); 822 } 823 824 int 825 out_fdc(fdc, x) 826 struct fdc_softc *fdc; 827 u_char x; 828 { 829 int i = 100000; 830 831 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 832 if (i <= 0) 833 return -1; 834 835 *fdc->sc_reg_fifo = x; 836 return 0; 837 } 838 839 int 840 fdopen(dev, flags, fmt, p) 841 dev_t dev; 842 int flags, fmt; 843 struct proc *p; 844 { 845 int unit, pmask; 846 struct fd_softc *fd; 847 struct fd_type *type; 848 849 unit = FDUNIT(dev); 850 if (unit >= fdcd.cd_ndevs) 851 return ENXIO; 852 fd = fdcd.cd_devs[unit]; 853 if (fd == 0) 854 return ENXIO; 855 type = fd_dev_to_type(fd, dev); 856 if (type == NULL) 857 return ENXIO; 858 859 if ((fd->sc_flags & FD_OPEN) != 0 && 860 fd->sc_type != type) 861 return EBUSY; 862 863 fd->sc_type = type; 864 fd->sc_cylin = -1; 865 fd->sc_flags |= FD_OPEN; 866 867 /* 868 * Only update the disklabel if we're not open anywhere else. 869 */ 870 if (fd->sc_dk.dk_openmask == 0) 871 fdgetdisklabel(dev); 872 873 pmask = (1 << DISKPART(dev)); 874 875 switch (fmt) { 876 case S_IFCHR: 877 fd->sc_dk.dk_copenmask |= pmask; 878 break; 879 880 case S_IFBLK: 881 fd->sc_dk.dk_bopenmask |= pmask; 882 break; 883 } 884 fd->sc_dk.dk_openmask = 885 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 886 887 return 0; 888 } 889 890 int 891 fdclose(dev, flags, fmt, p) 892 dev_t dev; 893 int flags, fmt; 894 struct proc *p; 895 { 896 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 897 int pmask = (1 << DISKPART(dev)); 898 899 fd->sc_flags &= ~FD_OPEN; 900 901 switch (fmt) { 902 case S_IFCHR: 903 fd->sc_dk.dk_copenmask &= ~pmask; 904 break; 905 906 case S_IFBLK: 907 fd->sc_dk.dk_bopenmask &= ~pmask; 908 break; 909 } 910 fd->sc_dk.dk_openmask = 911 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 912 913 return 0; 914 } 915 916 int 917 fdread(dev, uio, flag) 918 dev_t dev; 919 struct uio *uio; 920 int flag; 921 { 922 923 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 924 } 925 926 int 927 fdwrite(dev, uio, flag) 928 dev_t dev; 929 struct uio *uio; 930 int flag; 931 { 932 933 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 934 } 935 936 void 937 fdcstart(fdc) 938 struct fdc_softc *fdc; 939 { 940 941 #ifdef DIAGNOSTIC 942 /* only got here if controller's drive queue was inactive; should 943 be in idle state */ 944 if (fdc->sc_state != DEVIDLE) { 945 printf("fdcstart: not idle\n"); 946 return; 947 } 948 #endif 949 (void) fdcswintr(fdc); 950 } 951 952 void 953 fdcstatus(dv, n, s) 954 struct device *dv; 955 int n; 956 char *s; 957 { 958 struct fdc_softc *fdc = (void *)dv->dv_parent; 959 #if 0 960 /* 961 * A 82072 seems to return <invalid command> on 962 * gratuitous Sense Interrupt commands. 963 */ 964 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 965 out_fdc(fdc, NE7CMD_SENSEI); 966 (void) fdcresult(fdc); 967 n = 2; 968 } 969 #endif 970 971 /* Just print last status */ 972 n = fdc->sc_nstat; 973 974 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 975 976 switch (n) { 977 case 0: 978 printf("\n"); 979 break; 980 case 2: 981 printf(fmt1, 982 fdc->sc_status[0], NE7_ST0BITS, 983 fdc->sc_status[1]); 984 break; 985 case 7: 986 printf(fmt2, 987 fdc->sc_status[0], NE7_ST0BITS, 988 fdc->sc_status[1], NE7_ST1BITS, 989 fdc->sc_status[2], NE7_ST2BITS, 990 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 991 break; 992 #ifdef DIAGNOSTIC 993 default: 994 printf(" fdcstatus: weird size: %d\n", n); 995 break; 996 #endif 997 } 998 } 999 1000 void 1001 fdctimeout(arg) 1002 void *arg; 1003 { 1004 struct fdc_softc *fdc = arg; 1005 struct fd_softc *fd = fdc->sc_drives.tqh_first; 1006 int s; 1007 1008 s = splbio(); 1009 fdcstatus(&fd->sc_dv, 0, "timeout"); 1010 1011 if (fd->sc_q.b_actf) 1012 fdc->sc_state++; 1013 else 1014 fdc->sc_state = DEVIDLE; 1015 1016 (void) fdcswintr(fdc); 1017 splx(s); 1018 } 1019 1020 void 1021 fdcpseudointr(arg) 1022 void *arg; 1023 { 1024 struct fdc_softc *fdc = arg; 1025 int s; 1026 1027 /* Just ensure it has the right spl. */ 1028 s = splbio(); 1029 (void) fdcswintr(fdc); 1030 splx(s); 1031 } 1032 1033 1034 #ifdef FDC_C_HANDLER 1035 /* 1036 * hardware interrupt entry point: must be converted to `fast' 1037 * (in-window) handler. 1038 */ 1039 int 1040 fdchwintr(fdc) 1041 struct fdc_softc *fdc; 1042 { 1043 struct buf *bp; 1044 int read; 1045 1046 switch (fdc->sc_istate) { 1047 case ISTATE_SENSEI: 1048 out_fdc(fdc, NE7CMD_SENSEI); 1049 fdcresult(fdc); 1050 fdc->sc_istate = ISTATE_IDLE; 1051 ienab_bis(IE_FDSOFT); 1052 return 1; 1053 case ISTATE_IDLE: 1054 case ISTATE_SPURIOUS: 1055 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 1056 fdcresult(fdc); 1057 fdc->sc_istate = ISTATE_SPURIOUS; 1058 printf("fdc: stray hard interrupt... "); 1059 ienab_bis(IE_FDSOFT); 1060 return 1; 1061 case ISTATE_DMA: 1062 break; 1063 default: 1064 printf("fdc: goofed ...\n"); 1065 return 1; 1066 } 1067 1068 read = bp->b_flags & B_READ; 1069 for (;;) { 1070 register int msr; 1071 1072 msr = *fdc->sc_reg_msr; 1073 1074 if ((msr & NE7_RQM) == 0) 1075 break; 1076 1077 if ((msr & NE7_NDM) == 0) { 1078 fdcresult(fdc); 1079 fdc->sc_istate = ISTATE_IDLE; 1080 ienab_bis(IE_FDSOFT); 1081 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 1082 break; 1083 } 1084 1085 if (msr & NE7_DIO) { 1086 #ifdef DIAGNOSTIC 1087 if (!read) 1088 printf("fdxfer: false read\n"); 1089 #endif 1090 *fdc->sc_data++ = *fdc->sc_reg_fifo; 1091 } else { 1092 #ifdef DIAGNOSTIC 1093 if (read) 1094 printf("fdxfer: false write\n"); 1095 #endif 1096 *fdc->sc_reg_fifo = *fdc->sc_data++; 1097 } 1098 if (--fdc->sc_tc == 0) { 1099 auxregbisc(AUXIO_FTC, 0); 1100 fdc->sc_istate = ISTATE_IDLE; 1101 delay(10); 1102 auxregbisc(0, AUXIO_FTC); 1103 fdcresult(fdc); 1104 ienab_bis(IE_FDSOFT); 1105 break; 1106 } 1107 } 1108 return 1; 1109 } 1110 #endif 1111 1112 int 1113 fdcswintr(fdc) 1114 struct fdc_softc *fdc; 1115 { 1116 #define st0 fdc->sc_status[0] 1117 #define st1 fdc->sc_status[1] 1118 #define cyl fdc->sc_status[1] 1119 #define OUT_FDC(fdc, c, s) \ 1120 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1121 1122 struct fd_softc *fd; 1123 struct buf *bp; 1124 int read, head, sec, nblks; 1125 struct fd_type *type; 1126 1127 1128 if (fdc->sc_istate != ISTATE_IDLE) { 1129 /* Trouble... */ 1130 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1131 fdc->sc_state, fdc->sc_istate); 1132 fdc->sc_istate = ISTATE_IDLE; 1133 if (fdc->sc_state == RESETCOMPLETE || 1134 fdc->sc_state == RESETTIMEDOUT) { 1135 panic("fdcintr: spurious interrupt can't be cleared"); 1136 } 1137 goto doreset; 1138 } 1139 1140 loop: 1141 /* Is there a drive for the controller to do a transfer with? */ 1142 fd = fdc->sc_drives.tqh_first; 1143 if (fd == NULL) { 1144 fdc->sc_state = DEVIDLE; 1145 return 0; 1146 } 1147 1148 /* Is there a transfer to this drive? If not, deactivate drive. */ 1149 bp = fd->sc_q.b_actf; 1150 if (bp == NULL) { 1151 fd->sc_ops = 0; 1152 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1153 fd->sc_q.b_active = 0; 1154 goto loop; 1155 } 1156 1157 switch (fdc->sc_state) { 1158 case DEVIDLE: 1159 fdc->sc_errors = 0; 1160 fd->sc_skip = 0; 1161 fd->sc_bcount = bp->b_bcount; 1162 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1163 untimeout(fd_motor_off, fd); 1164 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1165 fdc->sc_state = MOTORWAIT; 1166 return 1; 1167 } 1168 if ((fd->sc_flags & FD_MOTOR) == 0) { 1169 /* Turn on the motor, being careful about pairing. */ 1170 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1171 if (ofd && ofd->sc_flags & FD_MOTOR) { 1172 untimeout(fd_motor_off, ofd); 1173 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1174 } 1175 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1176 fd_set_motor(fdc); 1177 fdc->sc_state = MOTORWAIT; 1178 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1179 /* Allow .25s for motor to stabilize. */ 1180 timeout(fd_motor_on, fd, hz / 4); 1181 } else { 1182 fd->sc_flags &= ~FD_MOTOR_WAIT; 1183 goto loop; 1184 } 1185 return 1; 1186 } 1187 /* Make sure the right drive is selected. */ 1188 fd_set_motor(fdc); 1189 1190 /* fall through */ 1191 case DOSEEK: 1192 doseek: 1193 if (fdc->sc_flags & FDC_EIS) { 1194 fd->sc_cylin = bp->b_cylin; 1195 /* We use implied seek */ 1196 goto doio; 1197 } 1198 1199 if (fd->sc_cylin == bp->b_cylin) 1200 goto doio; 1201 1202 /* specify command */ 1203 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1204 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1205 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1206 1207 fdc->sc_istate = ISTATE_SENSEI; 1208 /* seek function */ 1209 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1210 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1211 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1212 1213 fd->sc_cylin = -1; 1214 fdc->sc_state = SEEKWAIT; 1215 fdc->sc_nstat = 0; 1216 1217 fd->sc_dk.dk_seek++; 1218 disk_busy(&fd->sc_dk); 1219 1220 timeout(fdctimeout, fdc, 4 * hz); 1221 return 1; 1222 1223 case DOIO: 1224 doio: 1225 type = fd->sc_type; 1226 sec = fd->sc_blkno % type->seccyl; 1227 nblks = type->seccyl - sec; 1228 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1229 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1230 fd->sc_nblks = nblks; 1231 fd->sc_nbytes = nblks * FDC_BSIZE; 1232 head = sec / type->sectrac; 1233 sec -= head * type->sectrac; 1234 #ifdef DIAGNOSTIC 1235 {int block; 1236 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1237 if (block != fd->sc_blkno) { 1238 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1239 #ifdef DDB 1240 Debugger(); 1241 #endif 1242 }} 1243 #endif 1244 read = bp->b_flags & B_READ; 1245 1246 /* Setup for pseudo DMA */ 1247 fdc->sc_data = bp->b_data + fd->sc_skip; 1248 fdc->sc_tc = fd->sc_nbytes; 1249 1250 *fdc->sc_reg_drs = type->rate; 1251 #ifdef FD_DEBUG 1252 if (fdc_debug > 1) 1253 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1254 read ? "read" : "write", fd->sc_drive, 1255 fd->sc_cylin, head, sec, nblks); 1256 #endif 1257 fdc->sc_state = IOCOMPLETE; 1258 fdc->sc_istate = ISTATE_DMA; 1259 fdc->sc_nstat = 0; 1260 if (read) 1261 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1262 else 1263 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1264 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1265 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1266 OUT_FDC(fdc, head, IOTIMEDOUT); 1267 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1268 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1269 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1270 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1271 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1272 1273 disk_busy(&fd->sc_dk); 1274 1275 /* allow 2 seconds for operation */ 1276 timeout(fdctimeout, fdc, 2 * hz); 1277 return 1; /* will return later */ 1278 1279 case SEEKWAIT: 1280 untimeout(fdctimeout, fdc); 1281 fdc->sc_state = SEEKCOMPLETE; 1282 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1283 /* allow 1/50 second for heads to settle */ 1284 timeout(fdcpseudointr, fdc, hz / 50); 1285 return 1; /* will return later */ 1286 } 1287 1288 case SEEKCOMPLETE: 1289 disk_unbusy(&fd->sc_dk, 0); /* no data on seek */ 1290 1291 /* Make sure seek really happened. */ 1292 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1293 cyl != bp->b_cylin * fd->sc_type->step) { 1294 #ifdef FD_DEBUG 1295 if (fdc_debug) 1296 fdcstatus(&fd->sc_dv, 2, "seek failed"); 1297 #endif 1298 fdcretry(fdc); 1299 goto loop; 1300 } 1301 fd->sc_cylin = bp->b_cylin; 1302 goto doio; 1303 1304 case IOTIMEDOUT: 1305 auxregbisc(AUXIO_FTC, 0); 1306 delay(10); 1307 auxregbisc(0, AUXIO_FTC); 1308 (void)fdcresult(fdc); 1309 case SEEKTIMEDOUT: 1310 case RECALTIMEDOUT: 1311 case RESETTIMEDOUT: 1312 fdcretry(fdc); 1313 goto loop; 1314 1315 case IOCOMPLETE: /* IO DONE, post-analyze */ 1316 untimeout(fdctimeout, fdc); 1317 1318 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid)); 1319 1320 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1321 #ifdef FD_DEBUG 1322 if (fdc_debug) { 1323 fdcstatus(&fd->sc_dv, 7, 1324 bp->b_flags & B_READ 1325 ? "read failed" : "write failed"); 1326 printf("blkno %d nblks %d tc %d\n", 1327 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1328 } 1329 #endif 1330 if (fdc->sc_nstat == 7 && 1331 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1332 1333 /* 1334 * Silently retry overruns if no other 1335 * error bit is set. Adjust threshold. 1336 */ 1337 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1338 if (thr < 15) { 1339 thr++; 1340 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1341 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1342 #ifdef FD_DEBUG 1343 if (fdc_debug) 1344 printf("fdc: %d -> threshold\n", thr); 1345 #endif 1346 fdconf(fdc); 1347 fdc->sc_state = DOIO; 1348 fdc->sc_overruns = 0; 1349 } 1350 if (++fdc->sc_overruns < 3) 1351 goto loop; 1352 } 1353 fdcretry(fdc); 1354 goto loop; 1355 } 1356 if (fdc->sc_errors) { 1357 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1358 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1359 printf("\n"); 1360 fdc->sc_errors = 0; 1361 } else { 1362 if (--fdc->sc_overruns < -20) { 1363 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1364 if (thr > 0) { 1365 thr--; 1366 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1367 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1368 #ifdef FD_DEBUG 1369 if (fdc_debug) 1370 printf("fdc: %d -> threshold\n", thr); 1371 #endif 1372 fdconf(fdc); 1373 } 1374 fdc->sc_overruns = 0; 1375 } 1376 } 1377 fd->sc_blkno += fd->sc_nblks; 1378 fd->sc_skip += fd->sc_nbytes; 1379 fd->sc_bcount -= fd->sc_nbytes; 1380 if (fd->sc_bcount > 0) { 1381 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1382 goto doseek; 1383 } 1384 fdfinish(fd, bp); 1385 goto loop; 1386 1387 case DORESET: 1388 doreset: 1389 /* try a reset, keep motor on */ 1390 fd_set_motor(fdc); 1391 delay(100); 1392 fdc_reset(fdc); 1393 fdc->sc_nstat = 0; 1394 fdc->sc_istate = ISTATE_SENSEI; 1395 fdc->sc_state = RESETCOMPLETE; 1396 timeout(fdctimeout, fdc, hz / 2); 1397 return 1; /* will return later */ 1398 1399 case RESETCOMPLETE: 1400 untimeout(fdctimeout, fdc); 1401 fdconf(fdc); 1402 1403 /* fall through */ 1404 case DORECAL: 1405 fdc->sc_state = RECALWAIT; 1406 fdc->sc_istate = ISTATE_SENSEI; 1407 fdc->sc_nstat = 0; 1408 /* recalibrate function */ 1409 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1410 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1411 timeout(fdctimeout, fdc, 5 * hz); 1412 return 1; /* will return later */ 1413 1414 case RECALWAIT: 1415 untimeout(fdctimeout, fdc); 1416 fdc->sc_state = RECALCOMPLETE; 1417 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1418 /* allow 1/30 second for heads to settle */ 1419 timeout(fdcpseudointr, fdc, hz / 30); 1420 return 1; /* will return later */ 1421 } 1422 1423 case RECALCOMPLETE: 1424 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1425 #ifdef FD_DEBUG 1426 if (fdc_debug) 1427 fdcstatus(&fd->sc_dv, 2, "recalibrate failed"); 1428 #endif 1429 fdcretry(fdc); 1430 goto loop; 1431 } 1432 fd->sc_cylin = 0; 1433 goto doseek; 1434 1435 case MOTORWAIT: 1436 if (fd->sc_flags & FD_MOTOR_WAIT) 1437 return 1; /* time's not up yet */ 1438 goto doseek; 1439 1440 default: 1441 fdcstatus(&fd->sc_dv, 0, "stray interrupt"); 1442 return 1; 1443 } 1444 #ifdef DIAGNOSTIC 1445 panic("fdcintr: impossible"); 1446 #endif 1447 #undef st0 1448 #undef st1 1449 #undef cyl 1450 } 1451 1452 void 1453 fdcretry(fdc) 1454 struct fdc_softc *fdc; 1455 { 1456 struct fd_softc *fd; 1457 struct buf *bp; 1458 1459 fd = fdc->sc_drives.tqh_first; 1460 bp = fd->sc_q.b_actf; 1461 1462 fdc->sc_overruns = 0; 1463 1464 switch (fdc->sc_errors) { 1465 case 0: 1466 /* try again */ 1467 fdc->sc_state = 1468 (fdc->sc_flags & FDC_EIS) ? DOIO : DOSEEK; 1469 break; 1470 1471 case 1: case 2: case 3: 1472 /* didn't work; try recalibrating */ 1473 fdc->sc_state = DORECAL; 1474 break; 1475 1476 case 4: 1477 /* still no go; reset the bastard */ 1478 fdc->sc_state = DORESET; 1479 break; 1480 1481 default: 1482 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1483 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1484 1485 printf(fmt2, 1486 fdc->sc_status[0], NE7_ST0BITS, 1487 fdc->sc_status[1], NE7_ST1BITS, 1488 fdc->sc_status[2], NE7_ST2BITS, 1489 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1490 1491 bp->b_flags |= B_ERROR; 1492 bp->b_error = EIO; 1493 fdfinish(fd, bp); 1494 } 1495 fdc->sc_errors++; 1496 } 1497 1498 int 1499 fdsize(dev) 1500 dev_t dev; 1501 { 1502 1503 /* Swapping to floppies would not make sense. */ 1504 return -1; 1505 } 1506 1507 int 1508 fddump(dev, blkno, va, size) 1509 dev_t dev; 1510 daddr_t blkno; 1511 caddr_t va; 1512 size_t size; 1513 { 1514 1515 /* Not implemented. */ 1516 return EINVAL; 1517 } 1518 1519 int 1520 fdioctl(dev, cmd, addr, flag, p) 1521 dev_t dev; 1522 u_long cmd; 1523 caddr_t addr; 1524 int flag; 1525 struct proc *p; 1526 { 1527 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 1528 int error; 1529 1530 switch (cmd) { 1531 case DIOCGDINFO: 1532 *(struct disklabel *)addr = *(fd->sc_dk.dk_label); 1533 return 0; 1534 1535 case DIOCWLABEL: 1536 if ((flag & FWRITE) == 0) 1537 return EBADF; 1538 /* XXX do something */ 1539 return 0; 1540 1541 case DIOCWDINFO: 1542 if ((flag & FWRITE) == 0) 1543 return EBADF; 1544 1545 error = setdisklabel(fd->sc_dk.dk_label, 1546 (struct disklabel *)addr, 0, 1547 fd->sc_dk.dk_cpulabel); 1548 if (error) 1549 return error; 1550 1551 error = writedisklabel(dev, fdstrategy, 1552 fd->sc_dk.dk_label, 1553 fd->sc_dk.dk_cpulabel); 1554 return error; 1555 1556 case DIOCLOCK: 1557 /* 1558 * Nothing to do here, really. 1559 */ 1560 return 0; 1561 1562 case DIOCEJECT: 1563 fd_do_eject(); 1564 return 0; 1565 1566 #ifdef DEBUG 1567 case _IO('f', 100): 1568 { 1569 int i; 1570 struct fdc_softc *fdc = (struct fdc_softc *) 1571 fd->sc_dv.dv_parent; 1572 1573 out_fdc(fdc, NE7CMD_DUMPREG); 1574 fdcresult(fdc); 1575 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1576 for (i = 0; i < fdc->sc_nstat; i++) 1577 printf(" %x", fdc->sc_status[i]); 1578 printf(">\n"); 1579 } 1580 1581 return 0; 1582 case _IOW('f', 101, int): 1583 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg &= 1584 ~CFG_THRHLD_MASK; 1585 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |= 1586 (*(int *)addr & CFG_THRHLD_MASK); 1587 fdconf((struct fdc_softc *) fd->sc_dv.dv_parent); 1588 return 0; 1589 case _IO('f', 102): 1590 { 1591 int i; 1592 struct fdc_softc *fdc = (struct fdc_softc *) 1593 fd->sc_dv.dv_parent; 1594 out_fdc(fdc, NE7CMD_SENSEI); 1595 fdcresult(fdc); 1596 printf("sensei(%d regs): <", fdc->sc_nstat); 1597 for (i=0; i< fdc->sc_nstat; i++) 1598 printf(" 0x%x", fdc->sc_status[i]); 1599 } 1600 printf(">\n"); 1601 return 0; 1602 #endif 1603 default: 1604 return ENOTTY; 1605 } 1606 1607 #ifdef DIAGNOSTIC 1608 panic("fdioctl: impossible"); 1609 #endif 1610 } 1611 1612 void 1613 fdgetdisklabel(dev) 1614 dev_t dev; 1615 { 1616 int unit = FDUNIT(dev), i; 1617 struct fd_softc *fd = fdcd.cd_devs[unit]; 1618 struct disklabel *lp = fd->sc_dk.dk_label; 1619 struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel; 1620 1621 bzero(lp, sizeof(struct disklabel)); 1622 bzero(lp, sizeof(struct cpu_disklabel)); 1623 1624 lp->d_type = DTYPE_FLOPPY; 1625 lp->d_secsize = FDC_BSIZE; 1626 lp->d_secpercyl = fd->sc_type->seccyl; 1627 lp->d_nsectors = fd->sc_type->sectrac; 1628 lp->d_ncylinders = fd->sc_type->tracks; 1629 lp->d_ntracks = fd->sc_type->heads; /* Go figure... */ 1630 lp->d_rpm = 3600; /* XXX like it matters... */ 1631 1632 strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename)); 1633 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 1634 lp->d_interleave = 1; 1635 1636 lp->d_partitions[RAW_PART].p_offset = 0; 1637 lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders; 1638 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1639 lp->d_npartitions = RAW_PART + 1; 1640 1641 lp->d_magic = DISKMAGIC; 1642 lp->d_magic2 = DISKMAGIC; 1643 lp->d_checksum = dkcksum(lp); 1644 1645 /* 1646 * Call the generic disklabel extraction routine. If there's 1647 * not a label there, fake it. 1648 */ 1649 if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) { 1650 strncpy(lp->d_packname, "default label", 1651 sizeof(lp->d_packname)); 1652 /* 1653 * Reset the partition info; it might have gotten 1654 * trashed in readdisklabel(). 1655 * 1656 * XXX Why do we have to do this? readdisklabel() 1657 * should be safe... 1658 */ 1659 for (i = 0; i < MAXPARTITIONS; ++i) { 1660 lp->d_partitions[i].p_offset = 0; 1661 if (i == RAW_PART) { 1662 lp->d_partitions[i].p_size = 1663 lp->d_secpercyl * lp->d_ncylinders; 1664 lp->d_partitions[i].p_fstype = FS_BSDFFS; 1665 } else { 1666 lp->d_partitions[i].p_size = 0; 1667 lp->d_partitions[i].p_fstype = FS_UNUSED; 1668 } 1669 } 1670 lp->d_npartitions = RAW_PART + 1; 1671 } 1672 } 1673 1674 void 1675 fd_do_eject() 1676 { 1677 1678 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1679 delay(10); 1680 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1681 } 1682 1683 /* ARGSUSED */ 1684 void 1685 fd_mountroot_hook(dev) 1686 struct device *dev; 1687 { 1688 int c; 1689 1690 fd_do_eject(); 1691 printf("Insert filesystem floppy and press return."); 1692 for (;;) { 1693 c = cngetc(); 1694 if ((c == '\r') || (c == '\n')) { 1695 printf("\n"); 1696 return; 1697 } 1698 } 1699 } 1700
Indexes created Fri Oct 03 02:09:57 GMT 2025