fd.c revision 1.22
1 /* $NetBSD: fd.c,v 1.22 1996/02/10 18:37:36 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/conf.h> 47 #include <sys/file.h> 48 #include <sys/ioctl.h> 49 #include <sys/device.h> 50 #include <sys/disklabel.h> 51 #include <sys/dkstat.h> 52 #include <sys/disk.h> 53 #include <sys/buf.h> 54 #include <sys/uio.h> 55 #include <sys/stat.h> 56 #include <sys/syslog.h> 57 #include <sys/queue.h> 58 59 #include <machine/cpu.h> 60 #include <machine/autoconf.h> 61 #include <sparc/sparc/auxreg.h> 62 #include <sparc/dev/fdreg.h> 63 #include <sparc/dev/fdvar.h> 64 65 #define FDUNIT(dev) (minor(dev) / 8) 66 #define FDTYPE(dev) (minor(dev) % 8) 67 68 #define b_cylin b_resid 69 70 #define FD_DEBUG 71 #ifdef FD_DEBUG 72 int fdc_debug = 0; 73 #endif 74 75 enum fdc_state { 76 DEVIDLE = 0, 77 MOTORWAIT, 78 DOSEEK, 79 SEEKWAIT, 80 SEEKTIMEDOUT, 81 SEEKCOMPLETE, 82 DOIO, 83 IOCOMPLETE, 84 IOTIMEDOUT, 85 DORESET, 86 RESETCOMPLETE, 87 RESETTIMEDOUT, 88 DORECAL, 89 RECALWAIT, 90 RECALTIMEDOUT, 91 RECALCOMPLETE, 92 }; 93 94 /* software state, per controller */ 95 struct fdc_softc { 96 struct device sc_dev; /* boilerplate */ 97 struct intrhand sc_sih; 98 struct intrhand sc_hih; 99 caddr_t sc_reg; 100 struct fd_softc *sc_fd[4]; /* pointers to children */ 101 TAILQ_HEAD(drivehead, fd_softc) sc_drives; 102 enum fdc_state sc_state; 103 int sc_flags; 104 #define FDC_82077 0x01 105 #define FDC_NEEDHEADSETTLE 0x02 106 #define FDC_EIS 0x04 107 int sc_errors; /* number of retries so far */ 108 int sc_overruns; /* number of DMA overruns */ 109 int sc_cfg; /* current configuration */ 110 struct fdcio sc_io; 111 #define sc_reg_msr sc_io.fdcio_reg_msr 112 #define sc_reg_fifo sc_io.fdcio_reg_fifo 113 #define sc_reg_dor sc_io.fdcio_reg_dor 114 #define sc_reg_drs sc_io.fdcio_reg_msr 115 #define sc_istate sc_io.fdcio_istate 116 #define sc_data sc_io.fdcio_data 117 #define sc_tc sc_io.fdcio_tc 118 #define sc_nstat sc_io.fdcio_nstat 119 #define sc_status sc_io.fdcio_status 120 #define sc_intrcnt sc_io.fdcio_intrcnt 121 }; 122 123 #ifndef FDC_C_HANDLER 124 extern struct fdcio *fdciop; 125 #endif 126 127 /* controller driver configuration */ 128 int fdcmatch __P((struct device *, void *, void *)); 129 void fdcattach __P((struct device *, struct device *, void *)); 130 131 struct cfdriver fdccd = { 132 NULL, "fdc", fdcmatch, fdcattach, DV_DULL, sizeof(struct fdc_softc) 133 }; 134 135 /* 136 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 137 * we tell them apart. 138 */ 139 struct fd_type { 140 int sectrac; /* sectors per track */ 141 int heads; /* number of heads */ 142 int seccyl; /* sectors per cylinder */ 143 int secsize; /* size code for sectors */ 144 int datalen; /* data len when secsize = 0 */ 145 int steprate; /* step rate and head unload time */ 146 int gap1; /* gap len between sectors */ 147 int gap2; /* formatting gap */ 148 int tracks; /* total num of tracks */ 149 int size; /* size of disk in sectors */ 150 int step; /* steps per cylinder */ 151 int rate; /* transfer speed code */ 152 char *name; 153 }; 154 155 /* The order of entries in the following table is important -- BEWARE! */ 156 struct fd_type fd_types[] = { 157 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */ 158 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,"1.2MB" }, /* 1.2 MB AT-diskettes */ 159 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,"360KB/AT" }, /* 360kB in 1.2MB drive */ 160 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,"360KB/PC" }, /* 360kB PC diskettes */ 161 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,"720KB" }, /* 3.5" 720kB diskette */ 162 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,"720KB/x" }, /* 720kB in 1.2MB drive */ 163 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,"360KB/x" }, /* 360kB in 720kB drive */ 164 }; 165 166 /* software state, per disk (with up to 4 disks per ctlr) */ 167 struct fd_softc { 168 struct device sc_dv; /* generic device info */ 169 struct disk sc_dk; /* generic disk info */ 170 171 struct fd_type *sc_deftype; /* default type descriptor */ 172 struct fd_type *sc_type; /* current type descriptor */ 173 174 daddr_t sc_blkno; /* starting block number */ 175 int sc_bcount; /* byte count left */ 176 int sc_skip; /* bytes already transferred */ 177 int sc_nblks; /* number of blocks currently tranferring */ 178 int sc_nbytes; /* number of bytes currently tranferring */ 179 180 int sc_drive; /* physical unit number */ 181 int sc_flags; 182 #define FD_OPEN 0x01 /* it's open */ 183 #define FD_MOTOR 0x02 /* motor should be on */ 184 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 185 int sc_cylin; /* where we think the head is */ 186 187 void *sc_sdhook; /* shutdownhook cookie */ 188 189 TAILQ_ENTRY(fd_softc) sc_drivechain; 190 int sc_ops; /* I/O ops since last switch */ 191 struct buf sc_q; /* head of buf chain */ 192 }; 193 194 /* floppy driver configuration */ 195 int fdmatch __P((struct device *, void *, void *)); 196 void fdattach __P((struct device *, struct device *, void *)); 197 198 struct cfdriver fdcd = { 199 NULL, "fd", fdmatch, fdattach, DV_DISK, sizeof(struct fd_softc) 200 }; 201 202 void fdgetdisklabel __P((dev_t)); 203 int fd_get_parms __P((struct fd_softc *)); 204 void fdstrategy __P((struct buf *)); 205 void fdstart __P((struct fd_softc *)); 206 207 struct dkdriver fddkdriver = { fdstrategy }; 208 209 struct fd_type *fd_nvtotype __P((char *, int, int)); 210 void fd_set_motor __P((struct fdc_softc *fdc)); 211 void fd_motor_off __P((void *arg)); 212 void fd_motor_on __P((void *arg)); 213 int fdcresult __P((struct fdc_softc *fdc)); 214 int out_fdc __P((struct fdc_softc *fdc, u_char x)); 215 void fdcstart __P((struct fdc_softc *fdc)); 216 void fdcstatus __P((struct device *dv, int n, char *s)); 217 void fdc_reset __P((struct fdc_softc *fdc)); 218 void fdctimeout __P((void *arg)); 219 void fdcpseudointr __P((void *arg)); 220 #ifdef FDC_C_HANDLER 221 int fdchwintr __P((struct fdc_softc *)); 222 #else 223 void fdchwintr __P((void)); 224 #endif 225 int fdcswintr __P((struct fdc_softc *)); 226 void fdcretry __P((struct fdc_softc *fdc)); 227 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 228 void fd_do_eject __P((void)); 229 void fd_mountroot_hook __P((struct device *)); 230 231 #if PIL_FDSOFT == 4 232 #define IE_FDSOFT IE_L4 233 #else 234 #error 4 235 #endif 236 237 #define OBP_FDNAME (cputyp == CPU_SUN4M ? "SUNW,fdtwo" : "fd") 238 239 int 240 fdcmatch(parent, match, aux) 241 struct device *parent; 242 void *match, *aux; 243 { 244 struct cfdata *cf = match; 245 register struct confargs *ca = aux; 246 register struct romaux *ra = &ca->ca_ra; 247 248 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 249 if (strcmp(OBP_FDNAME, ra->ra_name)) 250 return (0); 251 if (ca->ca_bustype == BUS_MAIN) { 252 if (ca->ca_ra.ra_vaddr && 253 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 254 return (0); 255 } 256 return (1); 257 } 258 259 return (0); 260 } 261 262 /* 263 * Arguments passed between fdcattach and fdprobe. 264 */ 265 struct fdc_attach_args { 266 int fa_drive; 267 int fa_bootdev; 268 struct fd_type *fa_deftype; 269 }; 270 271 /* 272 * Print the location of a disk drive (called just before attaching the 273 * the drive). If `fdc' is not NULL, the drive was found but was not 274 * in the system config file; print the drive name as well. 275 * Return QUIET (config_find ignores this if the device was configured) to 276 * avoid printing `fdN not configured' messages. 277 */ 278 int 279 fdprint(aux, fdc) 280 void *aux; 281 char *fdc; 282 { 283 register struct fdc_attach_args *fa = aux; 284 285 if (!fdc) 286 printf(" drive %d", fa->fa_drive); 287 return QUIET; 288 } 289 290 static void 291 fdconf(fdc) 292 struct fdc_softc *fdc; 293 { 294 int vroom; 295 296 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 297 return; 298 299 /* 300 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 301 * the PROM thinks is appropriate. 302 */ 303 if ((vroom = fdc->sc_status[7]) == 0) 304 vroom = 0x64; 305 306 /* Configure controller to use FIFO and Implied Seek */ 307 out_fdc(fdc, NE7CMD_CFG); 308 out_fdc(fdc, vroom); 309 out_fdc(fdc, fdc->sc_cfg); 310 out_fdc(fdc, 0); /* PRETRK */ 311 /* No result phase */ 312 } 313 314 void 315 fdcattach(parent, self, aux) 316 struct device *parent, *self; 317 void *aux; 318 { 319 register struct confargs *ca = aux; 320 struct fdc_softc *fdc = (void *)self; 321 struct fdc_attach_args fa; 322 int n, pri; 323 char code; 324 325 if (ca->ca_ra.ra_vaddr) 326 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 327 else 328 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_reg, 0, 329 ca->ca_ra.ra_len, 330 ca->ca_bustype); 331 332 fdc->sc_state = DEVIDLE; 333 fdc->sc_istate = ISTATE_IDLE; 334 fdc->sc_flags |= FDC_EIS; 335 TAILQ_INIT(&fdc->sc_drives); 336 337 pri = ca->ca_ra.ra_intr[0].int_pri; 338 #ifdef FDC_C_HANDLER 339 fdc->sc_hih.ih_fun = (void *)fdchwintr; 340 fdc->sc_hih.ih_arg = fdc; 341 intr_establish(pri, &fdc->sc_hih); 342 #else 343 fdciop = &fdc->sc_io; 344 intr_fasttrap(pri, fdchwintr); 345 #endif 346 fdc->sc_sih.ih_fun = (void *)fdcswintr; 347 fdc->sc_sih.ih_arg = fdc; 348 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 349 350 /* Assume a 82077 */ 351 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 352 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 353 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 354 355 code = '7'; 356 if (*fdc->sc_reg_dor == NE7_RQM) { 357 /* 358 * This hack from Chris Torek: apparently DOR really 359 * addresses MSR/DRS on a 82072. 360 * We used to rely on the VERSION command to tell the 361 * difference (which did not work). 362 */ 363 *fdc->sc_reg_dor = FDC_250KBPS; 364 if (*fdc->sc_reg_dor == NE7_RQM) 365 code = '2'; 366 } 367 if (code == '7') { 368 fdc->sc_flags |= FDC_82077; 369 } else { 370 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 371 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 372 fdc->sc_reg_dor = 0; 373 } 374 375 #ifdef FD_DEBUG 376 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 377 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 378 if (fdc_debug) 379 printf("[version cmd]"); 380 } 381 #endif 382 383 /* 384 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 385 * Note: CFG_EFIFO is active-low, initial threshold value: 8 386 */ 387 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 388 fdconf(fdc); 389 390 if (fdc->sc_flags & FDC_82077) { 391 /* Lock configuration across soft resets. */ 392 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 393 if (fdcresult(fdc) != 1) 394 printf(" CFGLOCK: unexpected response"); 395 } 396 397 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 398 399 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 400 401 /* 402 * Controller and drives are represented by one and the same 403 * Openprom node, so we can as well check for the floppy boots here. 404 */ 405 if (ca->ca_ra.ra_bp && 406 strcmp(ca->ca_ra.ra_bp->name, OBP_FDNAME) == 0) { 407 /* 408 * WOAH THERE! It looks like we can get the bootpath 409 * in a couple of different formats!! The faked 410 * bootpath (and some v2?) looks like /fd@0,0 411 * but the real bootpath on some v2 OpenPROM 412 * systems looks like /fd0. We deal with that 413 * bere by looking for either case. --thorpej 414 */ 415 if (((ca->ca_ra.ra_bp->val[0] == 0) && /* /fd@0,0 */ 416 (ca->ca_ra.ra_bp->val[1] == 0)) || 417 ((ca->ca_ra.ra_bp->val[0] == -1) && /* /fd0 */ 418 (ca->ca_ra.ra_bp->val[1] == 0))) 419 fa.fa_bootdev = 1; 420 else 421 fa.fa_bootdev = 0; 422 } 423 424 /* physical limit: four drives per controller. */ 425 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 426 fa.fa_deftype = NULL; /* unknown */ 427 fa.fa_deftype = &fd_types[0]; /* XXX */ 428 (void)config_found(self, (void *)&fa, fdprint); 429 } 430 431 bootpath_store(1, NULL); 432 } 433 434 int 435 fdmatch(parent, match, aux) 436 struct device *parent; 437 void *match, *aux; 438 { 439 struct fdc_softc *fdc = (void *)parent; 440 struct cfdata *cf = match; 441 struct fdc_attach_args *fa = aux; 442 int drive = fa->fa_drive; 443 int n; 444 445 if (drive > 0) 446 /* XXX - for now, punt > 1 drives */ 447 return 0; 448 449 if (fdc->sc_flags & FDC_82077) { 450 /* select drive and turn on motor */ 451 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 452 /* wait for motor to spin up */ 453 delay(250000); 454 } else { 455 auxregbisc(AUXIO_FDS, 0); 456 } 457 fdc->sc_nstat = 0; 458 out_fdc(fdc, NE7CMD_RECAL); 459 out_fdc(fdc, drive); 460 /* wait for recalibrate */ 461 for (n = 0; n < 100000; n++) { 462 delay(10); 463 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 464 /* wait a bit longer till device *really* is ready */ 465 delay(100000); 466 if (out_fdc(fdc, NE7CMD_SENSEI)) 467 break; 468 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 469 /* 470 * Got `invalid command'; we interpret it 471 * to mean that the re-calibrate hasn't in 472 * fact finished yet 473 */ 474 continue; 475 break; 476 } 477 } 478 n = fdc->sc_nstat; 479 #ifdef FD_DEBUG 480 if (fdc_debug) { 481 int i; 482 printf("fdprobe: %d stati:", n); 483 for (i = 0; i < n; i++) 484 printf(" %x", fdc->sc_status[i]); 485 printf("\n"); 486 } 487 #endif 488 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 489 return 0; 490 /* turn off motor */ 491 if (fdc->sc_flags & FDC_82077) { 492 /* select drive and turn on motor */ 493 *fdc->sc_reg_dor = FDO_FRST; 494 } else { 495 auxregbisc(0, AUXIO_FDS); 496 } 497 498 return 1; 499 } 500 501 /* 502 * Controller is working, and drive responded. Attach it. 503 */ 504 void 505 fdattach(parent, self, aux) 506 struct device *parent, *self; 507 void *aux; 508 { 509 struct fdc_softc *fdc = (void *)parent; 510 struct fd_softc *fd = (void *)self; 511 struct fdc_attach_args *fa = aux; 512 struct fd_type *type = fa->fa_deftype; 513 int drive = fa->fa_drive; 514 515 /* XXX Allow `flags' to override device type? */ 516 517 if (type) 518 printf(": %s %d cyl, %d head, %d sec\n", type->name, 519 type->tracks, type->heads, type->sectrac); 520 else 521 printf(": density unknown\n"); 522 523 fd->sc_cylin = -1; 524 fd->sc_drive = drive; 525 fd->sc_deftype = type; 526 fdc->sc_fd[drive] = fd; 527 528 /* 529 * Initialize and attach the disk structure. 530 */ 531 fd->sc_dk.dk_name = fd->sc_dv.dv_xname; 532 fd->sc_dk.dk_driver = &fddkdriver; 533 disk_attach(&fd->sc_dk); 534 535 /* 536 * We're told if we're the boot device in fdcattach(). 537 */ 538 if (fa->fa_bootdev) 539 bootdv = &fd->sc_dv; 540 541 /* 542 * Establish a mountroot_hook anyway in case we booted 543 * with RB_ASKNAME and get selected as the boot device. 544 */ 545 mountroot_hook_establish(fd_mountroot_hook, &fd->sc_dv); 546 547 /* Make sure the drive motor gets turned off at shutdown time. */ 548 fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd); 549 550 /* XXX Need to do some more fiddling with sc_dk. */ 551 dk_establish(&fd->sc_dk, &fd->sc_dv); 552 } 553 554 inline struct fd_type * 555 fd_dev_to_type(fd, dev) 556 struct fd_softc *fd; 557 dev_t dev; 558 { 559 int type = FDTYPE(dev); 560 561 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 562 return NULL; 563 return type ? &fd_types[type - 1] : fd->sc_deftype; 564 } 565 566 void 567 fdstrategy(bp) 568 register struct buf *bp; /* IO operation to perform */ 569 { 570 struct fd_softc *fd; 571 int unit = FDUNIT(bp->b_dev); 572 int sz; 573 int s; 574 575 /* Valid unit, controller, and request? */ 576 if (unit >= fdcd.cd_ndevs || 577 (fd = fdcd.cd_devs[unit]) == 0 || 578 bp->b_blkno < 0 || 579 (bp->b_bcount % FDC_BSIZE) != 0) { 580 bp->b_error = EINVAL; 581 goto bad; 582 } 583 584 /* If it's a null transfer, return immediately. */ 585 if (bp->b_bcount == 0) 586 goto done; 587 588 sz = howmany(bp->b_bcount, FDC_BSIZE); 589 590 if (bp->b_blkno + sz > fd->sc_type->size) { 591 sz = fd->sc_type->size - bp->b_blkno; 592 if (sz == 0) { 593 /* If exactly at end of disk, return EOF. */ 594 bp->b_resid = bp->b_bcount; 595 goto done; 596 } 597 if (sz < 0) { 598 /* If past end of disk, return EINVAL. */ 599 bp->b_error = EINVAL; 600 goto bad; 601 } 602 /* Otherwise, truncate request. */ 603 bp->b_bcount = sz << DEV_BSHIFT; 604 } 605 606 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 607 608 #ifdef FD_DEBUG 609 if (fdc_debug > 1) 610 printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d\n", 611 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 612 #endif 613 614 /* Queue transfer on drive, activate drive and controller if idle. */ 615 s = splbio(); 616 disksort(&fd->sc_q, bp); 617 untimeout(fd_motor_off, fd); /* a good idea */ 618 if (!fd->sc_q.b_active) 619 fdstart(fd); 620 #ifdef DIAGNOSTIC 621 else { 622 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 623 if (fdc->sc_state == DEVIDLE) { 624 printf("fdstrategy: controller inactive\n"); 625 fdcstart(fdc); 626 } 627 } 628 #endif 629 splx(s); 630 return; 631 632 bad: 633 bp->b_flags |= B_ERROR; 634 done: 635 /* Toss transfer; we're done early. */ 636 biodone(bp); 637 } 638 639 void 640 fdstart(fd) 641 struct fd_softc *fd; 642 { 643 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 644 int active = fdc->sc_drives.tqh_first != 0; 645 646 /* Link into controller queue. */ 647 fd->sc_q.b_active = 1; 648 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 649 650 /* If controller not already active, start it. */ 651 if (!active) 652 fdcstart(fdc); 653 } 654 655 void 656 fdfinish(fd, bp) 657 struct fd_softc *fd; 658 struct buf *bp; 659 { 660 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 661 662 /* 663 * Move this drive to the end of the queue to give others a `fair' 664 * chance. We only force a switch if N operations are completed while 665 * another drive is waiting to be serviced, since there is a long motor 666 * startup delay whenever we switch. 667 */ 668 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 669 fd->sc_ops = 0; 670 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 671 if (bp->b_actf) { 672 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 673 } else 674 fd->sc_q.b_active = 0; 675 } 676 bp->b_resid = fd->sc_bcount; 677 fd->sc_skip = 0; 678 fd->sc_q.b_actf = bp->b_actf; 679 680 biodone(bp); 681 /* turn off motor 5s from now */ 682 timeout(fd_motor_off, fd, 5 * hz); 683 fdc->sc_state = DEVIDLE; 684 } 685 686 void 687 fdc_reset(fdc) 688 struct fdc_softc *fdc; 689 { 690 if (fdc->sc_flags & FDC_82077) { 691 *fdc->sc_reg_dor = FDO_MOEN(0); 692 } 693 694 *fdc->sc_reg_drs = DRS_RESET; 695 delay(10); 696 *fdc->sc_reg_drs = 0; 697 #ifdef FD_DEBUG 698 if (fdc_debug) 699 printf("fdc reset\n"); 700 #endif 701 } 702 703 void 704 fd_set_motor(fdc) 705 struct fdc_softc *fdc; 706 { 707 struct fd_softc *fd; 708 u_char status; 709 int n; 710 711 if (fdc->sc_flags & FDC_82077) { 712 status = FDO_FRST | FDO_FDMAEN; 713 if (fd = fdc->sc_drives.tqh_first) 714 status |= fd->sc_drive; 715 716 for (n = 0; n < 4; n++) 717 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 718 status |= FDO_MOEN(n); 719 *fdc->sc_reg_dor = status; 720 } else { 721 int on = 0; 722 723 for (n = 0; n < 4; n++) 724 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 725 on = 1; 726 if (on) { 727 auxregbisc(AUXIO_FDS, 0); 728 } else { 729 auxregbisc(0, AUXIO_FDS); 730 } 731 } 732 } 733 734 void 735 fd_motor_off(arg) 736 void *arg; 737 { 738 struct fd_softc *fd = arg; 739 int s; 740 741 s = splbio(); 742 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 743 fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent); 744 splx(s); 745 } 746 747 void 748 fd_motor_on(arg) 749 void *arg; 750 { 751 struct fd_softc *fd = arg; 752 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 753 int s; 754 755 s = splbio(); 756 fd->sc_flags &= ~FD_MOTOR_WAIT; 757 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 758 (void) fdcswintr(fdc); 759 splx(s); 760 } 761 762 int 763 fdcresult(fdc) 764 struct fdc_softc *fdc; 765 { 766 u_char i; 767 int j = 100000, 768 n = 0; 769 770 for (; j; j--) { 771 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 772 if (i == NE7_RQM) 773 return (fdc->sc_nstat = n); 774 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 775 if (n >= sizeof(fdc->sc_status)) { 776 log(LOG_ERR, "fdcresult: overrun\n"); 777 return -1; 778 } 779 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 780 } 781 } 782 log(LOG_ERR, "fdcresult: timeout\n"); 783 return (fdc->sc_nstat = -1); 784 } 785 786 int 787 out_fdc(fdc, x) 788 struct fdc_softc *fdc; 789 u_char x; 790 { 791 int i = 100000; 792 793 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 794 if (i <= 0) 795 return -1; 796 797 *fdc->sc_reg_fifo = x; 798 return 0; 799 } 800 801 int 802 Fdopen(dev, flags, fmt, p) 803 dev_t dev; 804 int flags, fmt; 805 struct proc *p; 806 { 807 int unit, pmask; 808 struct fd_softc *fd; 809 struct fd_type *type; 810 811 unit = FDUNIT(dev); 812 if (unit >= fdcd.cd_ndevs) 813 return ENXIO; 814 fd = fdcd.cd_devs[unit]; 815 if (fd == 0) 816 return ENXIO; 817 type = fd_dev_to_type(fd, dev); 818 if (type == NULL) 819 return ENXIO; 820 821 if ((fd->sc_flags & FD_OPEN) != 0 && 822 fd->sc_type != type) 823 return EBUSY; 824 825 fd->sc_type = type; 826 fd->sc_cylin = -1; 827 fd->sc_flags |= FD_OPEN; 828 829 /* 830 * Only update the disklabel if we're not open anywhere else. 831 */ 832 if (fd->sc_dk.dk_openmask == 0) 833 fdgetdisklabel(dev); 834 835 pmask = (1 << DISKPART(dev)); 836 837 switch (fmt) { 838 case S_IFCHR: 839 fd->sc_dk.dk_copenmask |= pmask; 840 break; 841 842 case S_IFBLK: 843 fd->sc_dk.dk_bopenmask |= pmask; 844 break; 845 } 846 fd->sc_dk.dk_openmask = 847 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 848 849 return 0; 850 } 851 852 int 853 fdclose(dev, flags, fmt, p) 854 dev_t dev; 855 int flags, fmt; 856 struct proc *p; 857 { 858 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 859 int pmask = (1 << DISKPART(dev)); 860 861 fd->sc_flags &= ~FD_OPEN; 862 863 switch (fmt) { 864 case S_IFCHR: 865 fd->sc_dk.dk_copenmask &= ~pmask; 866 break; 867 868 case S_IFBLK: 869 fd->sc_dk.dk_bopenmask &= ~pmask; 870 break; 871 } 872 fd->sc_dk.dk_openmask = 873 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 874 875 return 0; 876 } 877 878 int 879 fdread(dev, uio) 880 dev_t dev; 881 struct uio *uio; 882 { 883 884 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 885 } 886 887 int 888 fdwrite(dev, uio) 889 dev_t dev; 890 struct uio *uio; 891 { 892 893 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 894 } 895 896 void 897 fdcstart(fdc) 898 struct fdc_softc *fdc; 899 { 900 901 #ifdef DIAGNOSTIC 902 /* only got here if controller's drive queue was inactive; should 903 be in idle state */ 904 if (fdc->sc_state != DEVIDLE) { 905 printf("fdcstart: not idle\n"); 906 return; 907 } 908 #endif 909 (void) fdcswintr(fdc); 910 } 911 912 void 913 fdcstatus(dv, n, s) 914 struct device *dv; 915 int n; 916 char *s; 917 { 918 struct fdc_softc *fdc = (void *)dv->dv_parent; 919 920 #if 0 921 /* 922 * A 82072 seems to return <invalid command> on 923 * gratuitous Sense Interrupt commands. 924 */ 925 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 926 out_fdc(fdc, NE7CMD_SENSEI); 927 (void) fdcresult(fdc); 928 n = 2; 929 } 930 #endif 931 932 /* Just print last status */ 933 n = fdc->sc_nstat; 934 935 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 936 937 switch (n) { 938 case 0: 939 printf("\n"); 940 break; 941 case 2: 942 printf(" (st0 %b cyl %d)\n", 943 fdc->sc_status[0], NE7_ST0BITS, 944 fdc->sc_status[1]); 945 break; 946 case 7: 947 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 948 fdc->sc_status[0], NE7_ST0BITS, 949 fdc->sc_status[1], NE7_ST1BITS, 950 fdc->sc_status[2], NE7_ST2BITS, 951 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 952 break; 953 #ifdef DIAGNOSTIC 954 default: 955 printf(" fdcstatus: weird size: %d\n", n); 956 break; 957 #endif 958 } 959 } 960 961 void 962 fdctimeout(arg) 963 void *arg; 964 { 965 struct fdc_softc *fdc = arg; 966 struct fd_softc *fd = fdc->sc_drives.tqh_first; 967 int s; 968 969 s = splbio(); 970 fdcstatus(&fd->sc_dv, 0, "timeout"); 971 972 if (fd->sc_q.b_actf) 973 fdc->sc_state++; 974 else 975 fdc->sc_state = DEVIDLE; 976 977 (void) fdcswintr(fdc); 978 splx(s); 979 } 980 981 void 982 fdcpseudointr(arg) 983 void *arg; 984 { 985 struct fdc_softc *fdc = arg; 986 int s; 987 988 /* Just ensure it has the right spl. */ 989 s = splbio(); 990 (void) fdcswintr(fdc); 991 splx(s); 992 } 993 994 995 #ifdef FDC_C_HANDLER 996 /* 997 * hardware interrupt entry point: must be converted to `fast' 998 * (in-window) handler. 999 */ 1000 int 1001 fdchwintr(fdc) 1002 struct fdc_softc *fdc; 1003 { 1004 struct buf *bp; 1005 int read; 1006 1007 switch (fdc->sc_istate) { 1008 case ISTATE_SENSEI: 1009 out_fdc(fdc, NE7CMD_SENSEI); 1010 fdcresult(fdc); 1011 fdc->sc_istate = ISTATE_IDLE; 1012 ienab_bis(IE_FDSOFT); 1013 return 1; 1014 case ISTATE_IDLE: 1015 case ISTATE_SPURIOUS: 1016 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 1017 fdcresult(fdc); 1018 fdc->sc_istate = ISTATE_SPURIOUS; 1019 printf("fdc: stray hard interrupt... "); 1020 ienab_bis(IE_FDSOFT); 1021 return 1; 1022 case ISTATE_DMA: 1023 break; 1024 default: 1025 printf("fdc: goofed ...\n"); 1026 return 1; 1027 } 1028 1029 read = bp->b_flags & B_READ; 1030 for (;;) { 1031 register int msr; 1032 1033 msr = *fdc->sc_reg_msr; 1034 1035 if ((msr & NE7_RQM) == 0) 1036 break; 1037 1038 if ((msr & NE7_NDM) == 0) { 1039 fdcresult(fdc); 1040 fdc->sc_istate = ISTATE_IDLE; 1041 ienab_bis(IE_FDSOFT); 1042 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 1043 break; 1044 } 1045 1046 if (msr & NE7_DIO) { 1047 #ifdef DIAGNOSTIC 1048 if (!read) 1049 printf("fdxfer: false read\n"); 1050 #endif 1051 *fdc->sc_data++ = *fdc->sc_reg_fifo; 1052 } else { 1053 #ifdef DIAGNOSTIC 1054 if (read) 1055 printf("fdxfer: false write\n"); 1056 #endif 1057 *fdc->sc_reg_fifo = *fdc->sc_data++; 1058 } 1059 if (--fdc->sc_tc == 0) { 1060 auxregbisc(AUXIO_FTC, 0); 1061 fdc->sc_istate = ISTATE_IDLE; 1062 delay(10); 1063 auxregbisc(0, AUXIO_FTC); 1064 fdcresult(fdc); 1065 ienab_bis(IE_FDSOFT); 1066 break; 1067 } 1068 } 1069 return 1; 1070 } 1071 #endif 1072 1073 int 1074 fdcswintr(fdc) 1075 struct fdc_softc *fdc; 1076 { 1077 #define st0 fdc->sc_status[0] 1078 #define st1 fdc->sc_status[1] 1079 #define cyl fdc->sc_status[1] 1080 #define OUT_FDC(fdc, c, s) \ 1081 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1082 1083 struct fd_softc *fd; 1084 struct buf *bp; 1085 int read, head, trac, sec, i, s, nblks; 1086 struct fd_type *type; 1087 1088 1089 if (fdc->sc_istate != ISTATE_IDLE) { 1090 /* Trouble... */ 1091 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1092 fdc->sc_state, fdc->sc_istate); 1093 fdc->sc_istate = ISTATE_IDLE; 1094 if (fdc->sc_state == RESETCOMPLETE || 1095 fdc->sc_state == RESETTIMEDOUT) { 1096 panic("fdcintr: spurious interrupt can't be cleared"); 1097 } 1098 goto doreset; 1099 } 1100 1101 loop: 1102 /* Is there a drive for the controller to do a transfer with? */ 1103 fd = fdc->sc_drives.tqh_first; 1104 if (fd == NULL) { 1105 fdc->sc_state = DEVIDLE; 1106 return 0; 1107 } 1108 1109 /* Is there a transfer to this drive? If not, deactivate drive. */ 1110 bp = fd->sc_q.b_actf; 1111 if (bp == NULL) { 1112 fd->sc_ops = 0; 1113 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1114 fd->sc_q.b_active = 0; 1115 goto loop; 1116 } 1117 1118 switch (fdc->sc_state) { 1119 case DEVIDLE: 1120 fdc->sc_errors = 0; 1121 fd->sc_skip = 0; 1122 fd->sc_bcount = bp->b_bcount; 1123 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1124 untimeout(fd_motor_off, fd); 1125 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1126 fdc->sc_state = MOTORWAIT; 1127 return 1; 1128 } 1129 if ((fd->sc_flags & FD_MOTOR) == 0) { 1130 /* Turn on the motor, being careful about pairing. */ 1131 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1132 if (ofd && ofd->sc_flags & FD_MOTOR) { 1133 untimeout(fd_motor_off, ofd); 1134 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1135 } 1136 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1137 fd_set_motor(fdc); 1138 fdc->sc_state = MOTORWAIT; 1139 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1140 /* Allow .25s for motor to stabilize. */ 1141 timeout(fd_motor_on, fd, hz / 4); 1142 } else { 1143 fd->sc_flags &= ~FD_MOTOR_WAIT; 1144 goto loop; 1145 } 1146 return 1; 1147 } 1148 /* Make sure the right drive is selected. */ 1149 fd_set_motor(fdc); 1150 1151 /* fall through */ 1152 case DOSEEK: 1153 doseek: 1154 if (fdc->sc_flags & FDC_EIS) { 1155 fd->sc_cylin = bp->b_cylin; 1156 /* We use implied seek */ 1157 goto doio; 1158 } 1159 1160 if (fd->sc_cylin == bp->b_cylin) 1161 goto doio; 1162 1163 /* specify command */ 1164 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1165 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1166 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1167 1168 fdc->sc_istate = ISTATE_SENSEI; 1169 /* seek function */ 1170 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1171 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1172 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1173 1174 fd->sc_cylin = -1; 1175 fdc->sc_state = SEEKWAIT; 1176 fdc->sc_nstat = 0; 1177 1178 fd->sc_dk.dk_seek++; 1179 disk_busy(&fd->sc_dk); 1180 1181 timeout(fdctimeout, fdc, 4 * hz); 1182 return 1; 1183 1184 case DOIO: 1185 doio: 1186 type = fd->sc_type; 1187 sec = fd->sc_blkno % type->seccyl; 1188 nblks = type->seccyl - sec; 1189 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1190 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1191 fd->sc_nblks = nblks; 1192 fd->sc_nbytes = nblks * FDC_BSIZE; 1193 head = sec / type->sectrac; 1194 sec -= head * type->sectrac; 1195 #ifdef DIAGNOSTIC 1196 {int block; 1197 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1198 if (block != fd->sc_blkno) { 1199 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1200 #ifdef DDB 1201 Debugger(); 1202 #endif 1203 }} 1204 #endif 1205 read = bp->b_flags & B_READ; 1206 1207 /* Setup for pseudo DMA */ 1208 fdc->sc_data = bp->b_data + fd->sc_skip; 1209 fdc->sc_tc = fd->sc_nbytes; 1210 1211 *fdc->sc_reg_drs = type->rate; 1212 #ifdef FD_DEBUG 1213 if (fdc_debug > 1) 1214 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1215 read ? "read" : "write", fd->sc_drive, 1216 fd->sc_cylin, head, sec, nblks); 1217 #endif 1218 fdc->sc_state = IOCOMPLETE; 1219 fdc->sc_istate = ISTATE_DMA; 1220 fdc->sc_nstat = 0; 1221 if (read) 1222 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1223 else 1224 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1225 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1226 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1227 OUT_FDC(fdc, head, IOTIMEDOUT); 1228 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1229 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1230 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1231 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1232 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1233 1234 disk_busy(&fd->sc_dk); 1235 1236 /* allow 2 seconds for operation */ 1237 timeout(fdctimeout, fdc, 2 * hz); 1238 return 1; /* will return later */ 1239 1240 case SEEKWAIT: 1241 untimeout(fdctimeout, fdc); 1242 fdc->sc_state = SEEKCOMPLETE; 1243 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1244 /* allow 1/50 second for heads to settle */ 1245 timeout(fdcpseudointr, fdc, hz / 50); 1246 return 1; /* will return later */ 1247 } 1248 1249 case SEEKCOMPLETE: 1250 disk_unbusy(&fd->sc_dk, 0); /* no data on seek */ 1251 1252 /* Make sure seek really happened. */ 1253 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1254 cyl != bp->b_cylin * fd->sc_type->step) { 1255 #ifdef FD_DEBUG 1256 if (fdc_debug) 1257 fdcstatus(&fd->sc_dv, 2, "seek failed"); 1258 #endif 1259 fdcretry(fdc); 1260 goto loop; 1261 } 1262 fd->sc_cylin = bp->b_cylin; 1263 goto doio; 1264 1265 case IOTIMEDOUT: 1266 auxregbisc(AUXIO_FTC, 0); 1267 delay(10); 1268 auxregbisc(0, AUXIO_FTC); 1269 (void)fdcresult(fdc); 1270 case SEEKTIMEDOUT: 1271 case RECALTIMEDOUT: 1272 case RESETTIMEDOUT: 1273 fdcretry(fdc); 1274 goto loop; 1275 1276 case IOCOMPLETE: /* IO DONE, post-analyze */ 1277 untimeout(fdctimeout, fdc); 1278 1279 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid)); 1280 1281 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1282 #ifdef FD_DEBUG 1283 if (fdc_debug) { 1284 fdcstatus(&fd->sc_dv, 7, 1285 bp->b_flags & B_READ 1286 ? "read failed" : "write failed"); 1287 printf("blkno %d nblks %d tc %d\n", 1288 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1289 } 1290 #endif 1291 if (fdc->sc_nstat == 7 && 1292 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1293 1294 /* 1295 * Silently retry overruns if no other 1296 * error bit is set. Adjust threshold. 1297 */ 1298 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1299 if (thr < 15) { 1300 thr++; 1301 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1302 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1303 #ifdef FD_DEBUG 1304 if (fdc_debug) 1305 printf("fdc: %d -> threshold\n", thr); 1306 #endif 1307 fdconf(fdc); 1308 fdc->sc_state = DOIO; 1309 fdc->sc_overruns = 0; 1310 } 1311 if (++fdc->sc_overruns < 3) 1312 goto loop; 1313 } 1314 fdcretry(fdc); 1315 goto loop; 1316 } 1317 if (fdc->sc_errors) { 1318 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1319 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1320 printf("\n"); 1321 fdc->sc_errors = 0; 1322 } else { 1323 if (--fdc->sc_overruns < -20) { 1324 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1325 if (thr > 0) { 1326 thr--; 1327 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1328 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1329 #ifdef FD_DEBUG 1330 if (fdc_debug) 1331 printf("fdc: %d -> threshold\n", thr); 1332 #endif 1333 fdconf(fdc); 1334 } 1335 fdc->sc_overruns = 0; 1336 } 1337 } 1338 fd->sc_blkno += fd->sc_nblks; 1339 fd->sc_skip += fd->sc_nbytes; 1340 fd->sc_bcount -= fd->sc_nbytes; 1341 if (fd->sc_bcount > 0) { 1342 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1343 goto doseek; 1344 } 1345 fdfinish(fd, bp); 1346 goto loop; 1347 1348 case DORESET: 1349 doreset: 1350 /* try a reset, keep motor on */ 1351 fd_set_motor(fdc); 1352 delay(100); 1353 fdc_reset(fdc); 1354 fdc->sc_nstat = 0; 1355 fdc->sc_istate = ISTATE_SENSEI; 1356 fdc->sc_state = RESETCOMPLETE; 1357 timeout(fdctimeout, fdc, hz / 2); 1358 return 1; /* will return later */ 1359 1360 case RESETCOMPLETE: 1361 untimeout(fdctimeout, fdc); 1362 fdconf(fdc); 1363 1364 /* fall through */ 1365 case DORECAL: 1366 fdc->sc_state = RECALWAIT; 1367 fdc->sc_istate = ISTATE_SENSEI; 1368 fdc->sc_nstat = 0; 1369 /* recalibrate function */ 1370 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1371 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1372 timeout(fdctimeout, fdc, 5 * hz); 1373 return 1; /* will return later */ 1374 1375 case RECALWAIT: 1376 untimeout(fdctimeout, fdc); 1377 fdc->sc_state = RECALCOMPLETE; 1378 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1379 /* allow 1/30 second for heads to settle */ 1380 timeout(fdcpseudointr, fdc, hz / 30); 1381 return 1; /* will return later */ 1382 } 1383 1384 case RECALCOMPLETE: 1385 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1386 #ifdef FD_DEBUG 1387 if (fdc_debug) 1388 fdcstatus(&fd->sc_dv, 2, "recalibrate failed"); 1389 #endif 1390 fdcretry(fdc); 1391 goto loop; 1392 } 1393 fd->sc_cylin = 0; 1394 goto doseek; 1395 1396 case MOTORWAIT: 1397 if (fd->sc_flags & FD_MOTOR_WAIT) 1398 return 1; /* time's not up yet */ 1399 goto doseek; 1400 1401 default: 1402 fdcstatus(&fd->sc_dv, 0, "stray interrupt"); 1403 return 1; 1404 } 1405 #ifdef DIAGNOSTIC 1406 panic("fdcintr: impossible"); 1407 #endif 1408 #undef st0 1409 #undef st1 1410 #undef cyl 1411 } 1412 1413 void 1414 fdcretry(fdc) 1415 struct fdc_softc *fdc; 1416 { 1417 struct fd_softc *fd; 1418 struct buf *bp; 1419 1420 fd = fdc->sc_drives.tqh_first; 1421 bp = fd->sc_q.b_actf; 1422 1423 fdc->sc_overruns = 0; 1424 1425 switch (fdc->sc_errors) { 1426 case 0: 1427 /* try again */ 1428 fdc->sc_state = 1429 (fdc->sc_flags & FDC_EIS) ? DOIO : DOSEEK; 1430 break; 1431 1432 case 1: case 2: case 3: 1433 /* didn't work; try recalibrating */ 1434 fdc->sc_state = DORECAL; 1435 break; 1436 1437 case 4: 1438 /* still no go; reset the bastard */ 1439 fdc->sc_state = DORESET; 1440 break; 1441 1442 default: 1443 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1444 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1445 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 1446 fdc->sc_status[0], NE7_ST0BITS, 1447 fdc->sc_status[1], NE7_ST1BITS, 1448 fdc->sc_status[2], NE7_ST2BITS, 1449 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1450 1451 bp->b_flags |= B_ERROR; 1452 bp->b_error = EIO; 1453 fdfinish(fd, bp); 1454 } 1455 fdc->sc_errors++; 1456 } 1457 1458 int 1459 fdsize(dev) 1460 dev_t dev; 1461 { 1462 1463 /* Swapping to floppies would not make sense. */ 1464 return -1; 1465 } 1466 1467 int 1468 fddump() 1469 { 1470 1471 /* Not implemented. */ 1472 return EINVAL; 1473 } 1474 1475 int 1476 fdioctl(dev, cmd, addr, flag) 1477 dev_t dev; 1478 u_long cmd; 1479 caddr_t addr; 1480 int flag; 1481 { 1482 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 1483 struct disklabel buffer; 1484 int error; 1485 1486 switch (cmd) { 1487 case DIOCGDINFO: 1488 *(struct disklabel *)addr = *(fd->sc_dk.dk_label); 1489 return 0; 1490 1491 case DIOCWLABEL: 1492 if ((flag & FWRITE) == 0) 1493 return EBADF; 1494 /* XXX do something */ 1495 return 0; 1496 1497 case DIOCWDINFO: 1498 if ((flag & FWRITE) == 0) 1499 return EBADF; 1500 1501 error = setdisklabel(fd->sc_dk.dk_label, 1502 (struct disklabel *)addr, 0, 1503 fd->sc_dk.dk_cpulabel); 1504 if (error) 1505 return error; 1506 1507 error = writedisklabel(dev, fdstrategy, 1508 fd->sc_dk.dk_label, 1509 fd->sc_dk.dk_cpulabel); 1510 return error; 1511 1512 case DIOCLOCK: 1513 /* 1514 * Nothing to do here, really. 1515 */ 1516 return 0; 1517 1518 case DIOCEJECT: 1519 fd_do_eject(); 1520 return 0; 1521 1522 #ifdef DEBUG 1523 case _IO('f', 100): 1524 { 1525 int i; 1526 struct fdc_softc *fdc = (struct fdc_softc *) 1527 fd->sc_dv.dv_parent; 1528 1529 out_fdc(fdc, NE7CMD_DUMPREG); 1530 fdcresult(fdc); 1531 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1532 for (i = 0; i < fdc->sc_nstat; i++) 1533 printf(" %x", fdc->sc_status[i]); 1534 printf(">\n"); 1535 } 1536 1537 return 0; 1538 case _IOW('f', 101, int): 1539 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg &= 1540 ~CFG_THRHLD_MASK; 1541 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |= 1542 (*(int *)addr & CFG_THRHLD_MASK); 1543 fdconf(fd->sc_dv.dv_parent); 1544 return 0; 1545 case _IO('f', 102): 1546 { 1547 int i; 1548 struct fdc_softc *fdc = (struct fdc_softc *) 1549 fd->sc_dv.dv_parent; 1550 out_fdc(fdc, NE7CMD_SENSEI); 1551 fdcresult(fdc); 1552 printf("sensei(%d regs): <", fdc->sc_nstat); 1553 for (i=0; i< fdc->sc_nstat; i++) 1554 printf(" 0x%x", fdc->sc_status[i]); 1555 } 1556 printf(">\n"); 1557 return 0; 1558 #endif 1559 default: 1560 return ENOTTY; 1561 } 1562 1563 #ifdef DIAGNOSTIC 1564 panic("fdioctl: impossible"); 1565 #endif 1566 } 1567 1568 void 1569 fdgetdisklabel(dev) 1570 dev_t dev; 1571 { 1572 int unit = FDUNIT(dev), i; 1573 struct fd_softc *fd = fdcd.cd_devs[unit]; 1574 struct disklabel *lp = fd->sc_dk.dk_label; 1575 struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel; 1576 1577 bzero(lp, sizeof(struct disklabel)); 1578 bzero(lp, sizeof(struct cpu_disklabel)); 1579 1580 lp->d_type = DTYPE_FLOPPY; 1581 lp->d_secsize = FDC_BSIZE; 1582 lp->d_secpercyl = fd->sc_type->seccyl; 1583 lp->d_nsectors = fd->sc_type->sectrac; 1584 lp->d_ncylinders = fd->sc_type->tracks; 1585 lp->d_ntracks = fd->sc_type->heads; /* Go figure... */ 1586 lp->d_rpm = 3600; /* XXX like it matters... */ 1587 1588 strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename)); 1589 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 1590 lp->d_interleave = 1; 1591 1592 lp->d_partitions[RAW_PART].p_offset = 0; 1593 lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders; 1594 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1595 lp->d_npartitions = RAW_PART + 1; 1596 1597 lp->d_magic = DISKMAGIC; 1598 lp->d_magic2 = DISKMAGIC; 1599 lp->d_checksum = dkcksum(lp); 1600 1601 /* 1602 * Call the generic disklabel extraction routine. If there's 1603 * not a label there, fake it. 1604 */ 1605 if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) { 1606 strncpy(lp->d_packname, "default label", 1607 sizeof(lp->d_packname)); 1608 /* 1609 * Reset the partition info; it might have gotten 1610 * trashed in readdisklabel(). 1611 * 1612 * XXX Why do we have to do this? readdisklabel() 1613 * should be safe... 1614 */ 1615 for (i = 0; i < MAXPARTITIONS; ++i) { 1616 lp->d_partitions[i].p_offset = 0; 1617 if (i == RAW_PART) { 1618 lp->d_partitions[i].p_size = 1619 lp->d_secpercyl * lp->d_ncylinders; 1620 lp->d_partitions[i].p_fstype = FS_BSDFFS; 1621 } else { 1622 lp->d_partitions[i].p_size = 0; 1623 lp->d_partitions[i].p_fstype = FS_UNUSED; 1624 } 1625 } 1626 lp->d_npartitions = RAW_PART + 1; 1627 } 1628 } 1629 1630 void 1631 fd_do_eject() 1632 { 1633 1634 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1635 delay(10); 1636 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1637 } 1638 1639 /* ARGSUSED */ 1640 void 1641 fd_mountroot_hook(dev) 1642 struct device *dev; 1643 { 1644 int c; 1645 1646 fd_do_eject(); 1647 printf("Insert filesystem floppy and press return."); 1648 for (;;) { 1649 c = cngetc(); 1650 if ((c == '\r') || (c == '\n')) { 1651 printf("\n"); 1652 return; 1653 } 1654 } 1655 } 1656
Indexes created Fri Oct 03 02:09:57 GMT 2025