fd.c revision 1.12
1 /* $NetBSD: fd.c,v 1.12 1995/10/03 17:32:12 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/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/syslog.h> 56 #include <sys/queue.h> 57 58 #include <machine/cpu.h> 59 #include <machine/autoconf.h> 60 #include <sparc/sparc/auxreg.h> 61 #include <sparc/dev/fdreg.h> 62 #include <sparc/dev/fdvar.h> 63 64 #define FDUNIT(dev) (minor(dev) / 8) 65 #define FDTYPE(dev) (minor(dev) % 8) 66 67 #define b_cylin b_resid 68 69 #define FD_DEBUG 70 #ifdef FD_DEBUG 71 int fdc_debug = 0; 72 #endif 73 74 enum fdc_state { 75 DEVIDLE = 0, 76 MOTORWAIT, 77 DOSEEK, 78 SEEKWAIT, 79 SEEKTIMEDOUT, 80 SEEKCOMPLETE, 81 DOIO, 82 IOCOMPLETE, 83 IOTIMEDOUT, 84 DORESET, 85 RESETCOMPLETE, 86 RESETTIMEDOUT, 87 DORECAL, 88 RECALWAIT, 89 RECALTIMEDOUT, 90 RECALCOMPLETE, 91 }; 92 93 /* software state, per controller */ 94 struct fdc_softc { 95 struct dkdevice sc_dk; /* boilerplate */ 96 struct intrhand sc_sih; 97 struct intrhand sc_hih; 98 caddr_t sc_reg; 99 struct fd_softc *sc_fd[4]; /* pointers to children */ 100 TAILQ_HEAD(drivehead, fd_softc) sc_drives; 101 enum fdc_state sc_state; 102 int sc_flags; 103 #define FDC_82077 0x01 104 #define FDC_NEEDHEADSETTLE 0x02 105 #define FDC_EIS 0x04 106 int sc_errors; /* number of retries so far */ 107 int sc_overruns; /* number of DMA overruns */ 108 int sc_cfg; /* current configuration */ 109 struct fdcio sc_io; 110 #define sc_reg_msr sc_io.fdcio_reg_msr 111 #define sc_reg_fifo sc_io.fdcio_reg_fifo 112 #define sc_reg_dor sc_io.fdcio_reg_dor 113 #define sc_reg_drs sc_io.fdcio_reg_msr 114 #define sc_istate sc_io.fdcio_istate 115 #define sc_data sc_io.fdcio_data 116 #define sc_tc sc_io.fdcio_tc 117 #define sc_nstat sc_io.fdcio_nstat 118 #define sc_status sc_io.fdcio_status 119 #define sc_intrcnt sc_io.fdcio_intrcnt 120 }; 121 122 #ifndef FDC_C_HANDLER 123 extern struct fdcio *fdciop; 124 #endif 125 126 /* controller driver configuration */ 127 int fdcmatch __P((struct device *, void *, void *)); 128 void fdcattach __P((struct device *, struct device *, void *)); 129 130 struct cfdriver fdccd = { 131 NULL, "fdc", fdcmatch, fdcattach, DV_DULL, sizeof(struct fdc_softc) 132 }; 133 134 /* 135 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 136 * we tell them apart. 137 */ 138 struct fd_type { 139 int sectrac; /* sectors per track */ 140 int heads; /* number of heads */ 141 int seccyl; /* sectors per cylinder */ 142 int secsize; /* size code for sectors */ 143 int datalen; /* data len when secsize = 0 */ 144 int steprate; /* step rate and head unload time */ 145 int gap1; /* gap len between sectors */ 146 int gap2; /* formatting gap */ 147 int tracks; /* total num of tracks */ 148 int size; /* size of disk in sectors */ 149 int step; /* steps per cylinder */ 150 int rate; /* transfer speed code */ 151 char *name; 152 }; 153 154 /* The order of entries in the following table is important -- BEWARE! */ 155 struct fd_type fd_types[] = { 156 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */ 157 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,"1.2MB" }, /* 1.2 MB AT-diskettes */ 158 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,"360KB/AT" }, /* 360kB in 1.2MB drive */ 159 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,"360KB/PC" }, /* 360kB PC diskettes */ 160 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,"720KB" }, /* 3.5" 720kB diskette */ 161 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,"720KB/x" }, /* 720kB in 1.2MB drive */ 162 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,"360KB/x" }, /* 360kB in 720kB drive */ 163 }; 164 165 /* software state, per disk (with up to 4 disks per ctlr) */ 166 struct fd_softc { 167 struct dkdevice sc_dk; 168 169 struct fd_type *sc_deftype; /* default type descriptor */ 170 struct fd_type *sc_type; /* current type descriptor */ 171 172 daddr_t sc_blkno; /* starting block number */ 173 int sc_bcount; /* byte count left */ 174 int sc_skip; /* bytes already transferred */ 175 int sc_nblks; /* number of blocks currently tranferring */ 176 int sc_nbytes; /* number of bytes currently tranferring */ 177 178 int sc_drive; /* physical unit number */ 179 int sc_flags; 180 #define FD_OPEN 0x01 /* it's open */ 181 #define FD_MOTOR 0x02 /* motor should be on */ 182 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 183 int sc_cylin; /* where we think the head is */ 184 185 TAILQ_ENTRY(fd_softc) sc_drivechain; 186 int sc_ops; /* I/O ops since last switch */ 187 struct buf sc_q; /* head of buf chain */ 188 }; 189 190 /* floppy driver configuration */ 191 int fdmatch __P((struct device *, void *, void *)); 192 void fdattach __P((struct device *, struct device *, void *)); 193 194 struct cfdriver fdcd = { 195 NULL, "fd", fdmatch, fdattach, DV_DISK, sizeof(struct fd_softc) 196 }; 197 198 void fdgetdisklabel __P((struct fd_softc *)); 199 int fd_get_parms __P((struct fd_softc *)); 200 void fdstrategy __P((struct buf *)); 201 void fdstart __P((struct fd_softc *)); 202 203 struct dkdriver fddkdriver = { fdstrategy }; 204 205 struct fd_type *fd_nvtotype __P((char *, int, int)); 206 void fd_set_motor __P((struct fdc_softc *fdc)); 207 void fd_motor_off __P((void *arg)); 208 void fd_motor_on __P((void *arg)); 209 int fdcresult __P((struct fdc_softc *fdc)); 210 int out_fdc __P((struct fdc_softc *fdc, u_char x)); 211 void fdcstart __P((struct fdc_softc *fdc)); 212 void fdcstatus __P((struct device *dv, int n, char *s)); 213 void fdc_reset __P((struct fdc_softc *fdc)); 214 void fdctimeout __P((void *arg)); 215 void fdcpseudointr __P((void *arg)); 216 #ifdef FDC_C_HANDLER 217 int fdchwintr __P((struct fdc_softc *)); 218 #else 219 void fdchwintr __P((void)); 220 #endif 221 int fdcswintr __P((struct fdc_softc *)); 222 void fdcretry __P((struct fdc_softc *fdc)); 223 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 224 225 #if PIL_FDSOFT == 4 226 #define IE_FDSOFT IE_L4 227 #else 228 #error 4 229 #endif 230 231 #define OBP_FDNAME (cputyp == CPU_SUN4M ? "SUNW,fdtwo" : "fd") 232 233 int 234 fdcmatch(parent, match, aux) 235 struct device *parent; 236 void *match, *aux; 237 { 238 struct cfdata *cf = match; 239 register struct confargs *ca = aux; 240 register struct romaux *ra = &ca->ca_ra; 241 242 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 243 if (strcmp(OBP_FDNAME, ra->ra_name)) 244 return (0); 245 if (ca->ca_bustype == BUS_MAIN) { 246 if (ca->ca_ra.ra_vaddr && 247 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 248 return (0); 249 } 250 return (1); 251 } 252 253 return (0); 254 } 255 256 /* 257 * Arguments passed between fdcattach and fdprobe. 258 */ 259 struct fdc_attach_args { 260 int fa_drive; 261 struct fd_type *fa_deftype; 262 }; 263 264 /* 265 * Print the location of a disk drive (called just before attaching the 266 * the drive). If `fdc' is not NULL, the drive was found but was not 267 * in the system config file; print the drive name as well. 268 * Return QUIET (config_find ignores this if the device was configured) to 269 * avoid printing `fdN not configured' messages. 270 */ 271 int 272 fdprint(aux, fdc) 273 void *aux; 274 char *fdc; 275 { 276 register struct fdc_attach_args *fa = aux; 277 278 if (!fdc) 279 printf(" drive %d", fa->fa_drive); 280 return QUIET; 281 } 282 283 static void 284 fdconf(fdc) 285 struct fdc_softc *fdc; 286 { 287 int vroom; 288 289 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 290 return; 291 292 /* 293 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 294 * the PROM thinks is appropriate. 295 */ 296 if ((vroom = fdc->sc_status[7]) == 0) 297 vroom = 0x64; 298 299 /* Configure controller to use FIFO and Implied Seek */ 300 out_fdc(fdc, NE7CMD_CFG); 301 out_fdc(fdc, vroom); 302 out_fdc(fdc, fdc->sc_cfg); 303 out_fdc(fdc, 0); /* PRETRK */ 304 /* No result phase */ 305 } 306 307 void 308 fdcattach(parent, self, aux) 309 struct device *parent, *self; 310 void *aux; 311 { 312 register struct confargs *ca = aux; 313 struct fdc_softc *fdc = (void *)self; 314 struct fdc_attach_args fa; 315 int n, pri; 316 char code; 317 318 if (ca->ca_ra.ra_vaddr) 319 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 320 else 321 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_paddr, 322 ca->ca_ra.ra_len, 323 ca->ca_bustype); 324 325 fdc->sc_state = DEVIDLE; 326 fdc->sc_istate = ISTATE_IDLE; 327 fdc->sc_flags |= FDC_EIS; 328 TAILQ_INIT(&fdc->sc_drives); 329 330 pri = ca->ca_ra.ra_intr[0].int_pri; 331 #ifdef FDC_C_HANDLER 332 fdc->sc_hih.ih_fun = (void *)fdchwintr; 333 fdc->sc_hih.ih_arg = fdc; 334 intr_establish(pri, &fdc->sc_hih); 335 #else 336 fdciop = &fdc->sc_io; 337 intr_fasttrap(pri, fdchwintr); 338 #endif 339 fdc->sc_sih.ih_fun = (void *)fdcswintr; 340 fdc->sc_sih.ih_arg = fdc; 341 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 342 343 /* Assume a 82077 */ 344 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 345 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 346 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 347 348 code = '7'; 349 if (*fdc->sc_reg_dor == NE7_RQM) { 350 /* 351 * This hack from Chris Torek: apparently DOR really 352 * addresses MSR/DRS on a 82072. 353 * We used to rely on the VERSION command to tell the 354 * difference (which did not work). 355 */ 356 *fdc->sc_reg_dor = FDC_250KBPS; 357 if (*fdc->sc_reg_dor == NE7_RQM) 358 code = '2'; 359 } 360 if (code == '7') { 361 fdc->sc_flags |= FDC_82077; 362 } else { 363 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 364 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 365 fdc->sc_reg_dor = 0; 366 } 367 368 #ifdef FD_DEBUG 369 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 370 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 371 if (fdc_debug) 372 printf("[version cmd]"); 373 } 374 #endif 375 376 /* 377 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 378 * Note: CFG_EFIFO is active-low, initial threshold value: 8 379 */ 380 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 381 fdconf(fdc); 382 383 if (fdc->sc_flags & FDC_82077) { 384 /* Lock configuration across soft resets. */ 385 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 386 if (fdcresult(fdc) != 1) 387 printf(" CFGLOCK: unexpected response"); 388 } 389 390 evcnt_attach(&fdc->sc_dk.dk_dev, "intr", &fdc->sc_intrcnt); 391 392 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 393 394 /* 395 * Controller and drives are represented by one and the same 396 * Openprom node, so we can as well check for the floppy boots here. 397 */ 398 if (ca->ca_ra.ra_bp && 399 strcmp(ca->ca_ra.ra_bp->name, OBP_FDNAME) == 0 && 400 ca->ca_ra.ra_bp->val[0] == 0 && 401 ca->ca_ra.ra_bp->val[1] == 0) 402 bootdv = &fdc->sc_dk.dk_dev; 403 404 /* physical limit: four drives per controller. */ 405 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 406 fa.fa_deftype = NULL; /* unknown */ 407 fa.fa_deftype = &fd_types[0]; /* XXX */ 408 (void)config_found(self, (void *)&fa, fdprint); 409 } 410 } 411 412 int 413 fdmatch(parent, match, aux) 414 struct device *parent; 415 void *match, *aux; 416 { 417 struct fdc_softc *fdc = (void *)parent; 418 struct cfdata *cf = match; 419 struct fdc_attach_args *fa = aux; 420 int drive = fa->fa_drive; 421 int n; 422 423 if (drive > 0) 424 /* XXX - for now, punt > 1 drives */ 425 return 0; 426 427 if (fdc->sc_flags & FDC_82077) { 428 /* select drive and turn on motor */ 429 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 430 /* wait for motor to spin up */ 431 delay(250000); 432 } else { 433 auxregbisc(AUXIO_FDS, 0); 434 } 435 fdc->sc_nstat = 0; 436 out_fdc(fdc, NE7CMD_RECAL); 437 out_fdc(fdc, drive); 438 /* wait for recalibrate */ 439 for (n = 0; n < 100000; n++) { 440 delay(10); 441 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 442 /* wait a bit longer till device *really* is ready */ 443 delay(100000); 444 if (out_fdc(fdc, NE7CMD_SENSEI)) 445 break; 446 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 447 /* 448 * Got `invalid command'; we interpret it 449 * to mean that the re-calibrate hasn't in 450 * fact finished yet 451 */ 452 continue; 453 break; 454 } 455 } 456 n = fdc->sc_nstat; 457 #ifdef FD_DEBUG 458 if (fdc_debug) { 459 int i; 460 printf("fdprobe: %d stati:", n); 461 for (i = 0; i < n; i++) 462 printf(" %x", fdc->sc_status[i]); 463 printf("\n"); 464 } 465 #endif 466 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 467 return 0; 468 /* turn off motor */ 469 if (fdc->sc_flags & FDC_82077) { 470 /* select drive and turn on motor */ 471 *fdc->sc_reg_dor = FDO_FRST; 472 } else { 473 auxregbisc(0, AUXIO_FDS); 474 } 475 476 return 1; 477 } 478 479 /* 480 * Controller is working, and drive responded. Attach it. 481 */ 482 void 483 fdattach(parent, self, aux) 484 struct device *parent, *self; 485 void *aux; 486 { 487 struct fdc_softc *fdc = (void *)parent; 488 struct fd_softc *fd = (void *)self; 489 struct fdc_attach_args *fa = aux; 490 struct fd_type *type = fa->fa_deftype; 491 int drive = fa->fa_drive; 492 493 /* XXX Allow `flags' to override device type? */ 494 495 if (type) 496 printf(": %s %d cyl, %d head, %d sec\n", type->name, 497 type->tracks, type->heads, type->sectrac); 498 else 499 printf(": density unknown\n"); 500 501 fd->sc_cylin = -1; 502 fd->sc_drive = drive; 503 fd->sc_deftype = type; 504 fdc->sc_fd[drive] = fd; 505 fd->sc_dk.dk_driver = &fddkdriver; 506 507 /* XXX Need to do some more fiddling with sc_dk. */ 508 dk_establish(&fd->sc_dk, &fd->sc_dk.dk_dev); 509 } 510 511 inline struct fd_type * 512 fd_dev_to_type(fd, dev) 513 struct fd_softc *fd; 514 dev_t dev; 515 { 516 int type = FDTYPE(dev); 517 518 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 519 return NULL; 520 return type ? &fd_types[type - 1] : fd->sc_deftype; 521 } 522 523 void 524 fdstrategy(bp) 525 register struct buf *bp; /* IO operation to perform */ 526 { 527 struct fd_softc *fd; 528 int unit = FDUNIT(bp->b_dev); 529 int sz; 530 int s; 531 532 /* Valid unit, controller, and request? */ 533 if (unit >= fdcd.cd_ndevs || 534 (fd = fdcd.cd_devs[unit]) == 0 || 535 bp->b_blkno < 0 || 536 (bp->b_bcount % FDC_BSIZE) != 0) { 537 bp->b_error = EINVAL; 538 goto bad; 539 } 540 541 /* If it's a null transfer, return immediately. */ 542 if (bp->b_bcount == 0) 543 goto done; 544 545 sz = howmany(bp->b_bcount, FDC_BSIZE); 546 547 if (bp->b_blkno + sz > fd->sc_type->size) { 548 sz = fd->sc_type->size - bp->b_blkno; 549 if (sz == 0) { 550 /* If exactly at end of disk, return EOF. */ 551 bp->b_resid = bp->b_bcount; 552 goto done; 553 } 554 if (sz < 0) { 555 /* If past end of disk, return EINVAL. */ 556 bp->b_error = EINVAL; 557 goto bad; 558 } 559 /* Otherwise, truncate request. */ 560 bp->b_bcount = sz << DEV_BSHIFT; 561 } 562 563 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 564 565 #ifdef FD_DEBUG 566 if (fdc_debug > 1) 567 printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d\n", 568 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 569 #endif 570 571 /* Queue transfer on drive, activate drive and controller if idle. */ 572 s = splbio(); 573 disksort(&fd->sc_q, bp); 574 untimeout(fd_motor_off, fd); /* a good idea */ 575 if (!fd->sc_q.b_active) 576 fdstart(fd); 577 #ifdef DIAGNOSTIC 578 else { 579 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 580 if (fdc->sc_state == DEVIDLE) { 581 printf("fdstrategy: controller inactive\n"); 582 fdcstart(fdc); 583 } 584 } 585 #endif 586 splx(s); 587 return; 588 589 bad: 590 bp->b_flags |= B_ERROR; 591 done: 592 /* Toss transfer; we're done early. */ 593 biodone(bp); 594 } 595 596 void 597 fdstart(fd) 598 struct fd_softc *fd; 599 { 600 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 601 int active = fdc->sc_drives.tqh_first != 0; 602 603 /* Link into controller queue. */ 604 fd->sc_q.b_active = 1; 605 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 606 607 /* If controller not already active, start it. */ 608 if (!active) 609 fdcstart(fdc); 610 } 611 612 void 613 fdfinish(fd, bp) 614 struct fd_softc *fd; 615 struct buf *bp; 616 { 617 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 618 619 /* 620 * Move this drive to the end of the queue to give others a `fair' 621 * chance. We only force a switch if N operations are completed while 622 * another drive is waiting to be serviced, since there is a long motor 623 * startup delay whenever we switch. 624 */ 625 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 626 fd->sc_ops = 0; 627 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 628 if (bp->b_actf) { 629 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 630 } else 631 fd->sc_q.b_active = 0; 632 } 633 bp->b_resid = fd->sc_bcount; 634 fd->sc_skip = 0; 635 fd->sc_q.b_actf = bp->b_actf; 636 biodone(bp); 637 /* turn off motor 5s from now */ 638 timeout(fd_motor_off, fd, 5 * hz); 639 fdc->sc_state = DEVIDLE; 640 } 641 642 void 643 fdc_reset(fdc) 644 struct fdc_softc *fdc; 645 { 646 if (fdc->sc_flags & FDC_82077) { 647 *fdc->sc_reg_dor = FDO_MOEN(0); 648 } 649 650 *fdc->sc_reg_drs = DRS_RESET; 651 delay(10); 652 *fdc->sc_reg_drs = 0; 653 #ifdef FD_DEBUG 654 if (fdc_debug) 655 printf("fdc reset\n"); 656 #endif 657 } 658 659 void 660 fd_set_motor(fdc) 661 struct fdc_softc *fdc; 662 { 663 struct fd_softc *fd; 664 u_char status; 665 int n; 666 667 if (fdc->sc_flags & FDC_82077) { 668 status = FDO_FRST | FDO_FDMAEN; 669 if (fd = fdc->sc_drives.tqh_first) 670 status |= fd->sc_drive; 671 672 for (n = 0; n < 4; n++) 673 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 674 status |= FDO_MOEN(n); 675 *fdc->sc_reg_dor = status; 676 } else { 677 int on = 0; 678 679 for (n = 0; n < 4; n++) 680 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 681 on = 1; 682 if (on) { 683 auxregbisc(AUXIO_FDS, 0); 684 } else { 685 auxregbisc(0, AUXIO_FDS); 686 } 687 } 688 } 689 690 void 691 fd_motor_off(arg) 692 void *arg; 693 { 694 struct fd_softc *fd = arg; 695 int s; 696 697 s = splbio(); 698 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 699 fd_set_motor((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent); 700 splx(s); 701 } 702 703 void 704 fd_motor_on(arg) 705 void *arg; 706 { 707 struct fd_softc *fd = arg; 708 struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent; 709 int s; 710 711 s = splbio(); 712 fd->sc_flags &= ~FD_MOTOR_WAIT; 713 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 714 (void) fdcswintr(fdc); 715 splx(s); 716 } 717 718 int 719 fdcresult(fdc) 720 struct fdc_softc *fdc; 721 { 722 u_char i; 723 int j = 100000, 724 n = 0; 725 726 for (; j; j--) { 727 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 728 if (i == NE7_RQM) 729 return (fdc->sc_nstat = n); 730 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 731 if (n >= sizeof(fdc->sc_status)) { 732 log(LOG_ERR, "fdcresult: overrun\n"); 733 return -1; 734 } 735 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 736 } 737 } 738 log(LOG_ERR, "fdcresult: timeout\n"); 739 return (fdc->sc_nstat = -1); 740 } 741 742 int 743 out_fdc(fdc, x) 744 struct fdc_softc *fdc; 745 u_char x; 746 { 747 int i = 100000; 748 749 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 750 if (i <= 0) 751 return -1; 752 753 *fdc->sc_reg_fifo = x; 754 return 0; 755 } 756 757 int 758 Fdopen(dev, flags) 759 dev_t dev; 760 int flags; 761 { 762 int unit; 763 struct fd_softc *fd; 764 struct fd_type *type; 765 766 unit = FDUNIT(dev); 767 if (unit >= fdcd.cd_ndevs) 768 return ENXIO; 769 fd = fdcd.cd_devs[unit]; 770 if (fd == 0) 771 return ENXIO; 772 type = fd_dev_to_type(fd, dev); 773 if (type == NULL) 774 return ENXIO; 775 776 if ((fd->sc_flags & FD_OPEN) != 0 && 777 fd->sc_type != type) 778 return EBUSY; 779 780 fd->sc_type = type; 781 fd->sc_cylin = -1; 782 fd->sc_flags |= FD_OPEN; 783 784 return 0; 785 } 786 787 int 788 fdclose(dev, flags) 789 dev_t dev; 790 int flags; 791 { 792 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 793 794 fd->sc_flags &= ~FD_OPEN; 795 return 0; 796 } 797 798 int 799 fdread(dev, uio) 800 dev_t dev; 801 struct uio *uio; 802 { 803 804 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 805 } 806 807 int 808 fdwrite(dev, uio) 809 dev_t dev; 810 struct uio *uio; 811 { 812 813 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 814 } 815 816 void 817 fdcstart(fdc) 818 struct fdc_softc *fdc; 819 { 820 821 #ifdef DIAGNOSTIC 822 /* only got here if controller's drive queue was inactive; should 823 be in idle state */ 824 if (fdc->sc_state != DEVIDLE) { 825 printf("fdcstart: not idle\n"); 826 return; 827 } 828 #endif 829 (void) fdcswintr(fdc); 830 } 831 832 void 833 fdcstatus(dv, n, s) 834 struct device *dv; 835 int n; 836 char *s; 837 { 838 struct fdc_softc *fdc = (void *)dv->dv_parent; 839 840 #if 0 841 /* 842 * A 82072 seems to return <invalid command> on 843 * gratuitous Sense Interrupt commands. 844 */ 845 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 846 out_fdc(fdc, NE7CMD_SENSEI); 847 (void) fdcresult(fdc); 848 n = 2; 849 } 850 #endif 851 852 /* Just print last status */ 853 n = fdc->sc_nstat; 854 855 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 856 857 switch (n) { 858 case 0: 859 printf("\n"); 860 break; 861 case 2: 862 printf(" (st0 %b cyl %d)\n", 863 fdc->sc_status[0], NE7_ST0BITS, 864 fdc->sc_status[1]); 865 break; 866 case 7: 867 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 868 fdc->sc_status[0], NE7_ST0BITS, 869 fdc->sc_status[1], NE7_ST1BITS, 870 fdc->sc_status[2], NE7_ST2BITS, 871 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 872 break; 873 #ifdef DIAGNOSTIC 874 default: 875 printf(" fdcstatus: weird size: %d\n", n); 876 break; 877 #endif 878 } 879 } 880 881 void 882 fdctimeout(arg) 883 void *arg; 884 { 885 struct fdc_softc *fdc = arg; 886 struct fd_softc *fd = fdc->sc_drives.tqh_first; 887 int s; 888 889 s = splbio(); 890 fdcstatus(&fd->sc_dk.dk_dev, 0, "timeout"); 891 892 if (fd->sc_q.b_actf) 893 fdc->sc_state++; 894 else 895 fdc->sc_state = DEVIDLE; 896 897 (void) fdcswintr(fdc); 898 splx(s); 899 } 900 901 void 902 fdcpseudointr(arg) 903 void *arg; 904 { 905 struct fdc_softc *fdc = arg; 906 int s; 907 908 /* Just ensure it has the right spl. */ 909 s = splbio(); 910 (void) fdcswintr(fdc); 911 splx(s); 912 } 913 914 915 #ifdef FDC_C_HANDLER 916 /* 917 * hardware interrupt entry point: must be converted to `fast' 918 * (in-window) handler. 919 */ 920 int 921 fdchwintr(fdc) 922 struct fdc_softc *fdc; 923 { 924 struct buf *bp; 925 int read; 926 927 switch (fdc->sc_istate) { 928 case ISTATE_SENSEI: 929 out_fdc(fdc, NE7CMD_SENSEI); 930 fdcresult(fdc); 931 fdc->sc_istate = ISTATE_IDLE; 932 ienab_bis(IE_FDSOFT); 933 return 1; 934 case ISTATE_IDLE: 935 case ISTATE_SPURIOUS: 936 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 937 fdcresult(fdc); 938 fdc->sc_istate = ISTATE_SPURIOUS; 939 printf("fdc: stray hard interrupt... "); 940 ienab_bis(IE_FDSOFT); 941 return 1; 942 case ISTATE_DMA: 943 break; 944 default: 945 printf("fdc: goofed ...\n"); 946 return 1; 947 } 948 949 read = bp->b_flags & B_READ; 950 for (;;) { 951 register int msr; 952 953 msr = *fdc->sc_reg_msr; 954 955 if ((msr & NE7_RQM) == 0) 956 break; 957 958 if ((msr & NE7_NDM) == 0) { 959 fdcresult(fdc); 960 fdc->sc_istate = ISTATE_IDLE; 961 ienab_bis(IE_FDSOFT); 962 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 963 break; 964 } 965 966 if (msr & NE7_DIO) { 967 #ifdef DIAGNOSTIC 968 if (!read) 969 printf("fdxfer: false read\n"); 970 #endif 971 *fdc->sc_data++ = *fdc->sc_reg_fifo; 972 } else { 973 #ifdef DIAGNOSTIC 974 if (read) 975 printf("fdxfer: false write\n"); 976 #endif 977 *fdc->sc_reg_fifo = *fdc->sc_data++; 978 } 979 if (--fdc->sc_tc == 0) { 980 auxregbisc(AUXIO_FTC, 0); 981 fdc->sc_istate = ISTATE_IDLE; 982 delay(10); 983 auxregbisc(0, AUXIO_FTC); 984 fdcresult(fdc); 985 ienab_bis(IE_FDSOFT); 986 break; 987 } 988 } 989 return 1; 990 } 991 #endif 992 993 int 994 fdcswintr(fdc) 995 struct fdc_softc *fdc; 996 { 997 #define st0 fdc->sc_status[0] 998 #define st1 fdc->sc_status[1] 999 #define cyl fdc->sc_status[1] 1000 #define OUT_FDC(fdc, c, s) \ 1001 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1002 1003 struct fd_softc *fd; 1004 struct buf *bp; 1005 int read, head, trac, sec, i, s, nblks; 1006 struct fd_type *type; 1007 1008 1009 if (fdc->sc_istate != ISTATE_IDLE) { 1010 /* Trouble... */ 1011 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1012 fdc->sc_state, fdc->sc_istate); 1013 fdc->sc_istate = ISTATE_IDLE; 1014 if (fdc->sc_state == RESETCOMPLETE || 1015 fdc->sc_state == RESETTIMEDOUT) { 1016 panic("fdcintr: spurious interrupt can't be cleared"); 1017 } 1018 goto doreset; 1019 } 1020 1021 loop: 1022 /* Is there a drive for the controller to do a transfer with? */ 1023 fd = fdc->sc_drives.tqh_first; 1024 if (fd == NULL) { 1025 fdc->sc_state = DEVIDLE; 1026 return 0; 1027 } 1028 1029 /* Is there a transfer to this drive? If not, deactivate drive. */ 1030 bp = fd->sc_q.b_actf; 1031 if (bp == NULL) { 1032 fd->sc_ops = 0; 1033 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1034 fd->sc_q.b_active = 0; 1035 goto loop; 1036 } 1037 1038 switch (fdc->sc_state) { 1039 case DEVIDLE: 1040 fdc->sc_errors = 0; 1041 fd->sc_skip = 0; 1042 fd->sc_bcount = bp->b_bcount; 1043 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1044 untimeout(fd_motor_off, fd); 1045 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1046 fdc->sc_state = MOTORWAIT; 1047 return 1; 1048 } 1049 if ((fd->sc_flags & FD_MOTOR) == 0) { 1050 /* Turn on the motor, being careful about pairing. */ 1051 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1052 if (ofd && ofd->sc_flags & FD_MOTOR) { 1053 untimeout(fd_motor_off, ofd); 1054 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1055 } 1056 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1057 fd_set_motor(fdc); 1058 fdc->sc_state = MOTORWAIT; 1059 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1060 /* Allow .25s for motor to stabilize. */ 1061 timeout(fd_motor_on, fd, hz / 4); 1062 } else { 1063 fd->sc_flags &= ~FD_MOTOR_WAIT; 1064 goto loop; 1065 } 1066 return 1; 1067 } 1068 /* Make sure the right drive is selected. */ 1069 fd_set_motor(fdc); 1070 1071 /* fall through */ 1072 case DOSEEK: 1073 doseek: 1074 if (fdc->sc_flags & FDC_EIS) { 1075 fd->sc_cylin = bp->b_cylin; 1076 /* We use implied seek */ 1077 goto doio; 1078 } 1079 1080 if (fd->sc_cylin == bp->b_cylin) 1081 goto doio; 1082 1083 /* specify command */ 1084 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1085 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1086 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1087 1088 fdc->sc_istate = ISTATE_SENSEI; 1089 /* seek function */ 1090 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1091 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1092 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1093 1094 fd->sc_cylin = -1; 1095 fdc->sc_state = SEEKWAIT; 1096 fdc->sc_nstat = 0; 1097 timeout(fdctimeout, fdc, 4 * hz); 1098 return 1; 1099 1100 case DOIO: 1101 doio: 1102 type = fd->sc_type; 1103 sec = fd->sc_blkno % type->seccyl; 1104 nblks = type->seccyl - sec; 1105 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1106 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1107 fd->sc_nblks = nblks; 1108 fd->sc_nbytes = nblks * FDC_BSIZE; 1109 head = sec / type->sectrac; 1110 sec -= head * type->sectrac; 1111 #ifdef DIAGNOSTIC 1112 {int block; 1113 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1114 if (block != fd->sc_blkno) { 1115 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1116 #ifdef DDB 1117 Debugger(); 1118 #endif 1119 }} 1120 #endif 1121 read = bp->b_flags & B_READ; 1122 1123 /* Setup for pseudo DMA */ 1124 fdc->sc_data = bp->b_data + fd->sc_skip; 1125 fdc->sc_tc = fd->sc_nbytes; 1126 1127 *fdc->sc_reg_drs = type->rate; 1128 #ifdef FD_DEBUG 1129 if (fdc_debug > 1) 1130 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1131 read ? "read" : "write", fd->sc_drive, 1132 fd->sc_cylin, head, sec, nblks); 1133 #endif 1134 fdc->sc_state = IOCOMPLETE; 1135 fdc->sc_istate = ISTATE_DMA; 1136 fdc->sc_nstat = 0; 1137 if (read) 1138 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1139 else 1140 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1141 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1142 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1143 OUT_FDC(fdc, head, IOTIMEDOUT); 1144 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1145 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1146 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1147 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1148 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1149 /* allow 2 seconds for operation */ 1150 timeout(fdctimeout, fdc, 2 * hz); 1151 return 1; /* will return later */ 1152 1153 case SEEKWAIT: 1154 untimeout(fdctimeout, fdc); 1155 fdc->sc_state = SEEKCOMPLETE; 1156 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1157 /* allow 1/50 second for heads to settle */ 1158 timeout(fdcpseudointr, fdc, hz / 50); 1159 return 1; /* will return later */ 1160 } 1161 1162 case SEEKCOMPLETE: 1163 /* Make sure seek really happened. */ 1164 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1165 cyl != bp->b_cylin * fd->sc_type->step) { 1166 #ifdef FD_DEBUG 1167 if (fdc_debug) 1168 fdcstatus(&fd->sc_dk.dk_dev, 2, "seek failed"); 1169 #endif 1170 fdcretry(fdc); 1171 goto loop; 1172 } 1173 fd->sc_cylin = bp->b_cylin; 1174 goto doio; 1175 1176 case IOTIMEDOUT: 1177 auxregbisc(AUXIO_FTC, 0); 1178 delay(10); 1179 auxregbisc(0, AUXIO_FTC); 1180 (void)fdcresult(fdc); 1181 case SEEKTIMEDOUT: 1182 case RECALTIMEDOUT: 1183 case RESETTIMEDOUT: 1184 fdcretry(fdc); 1185 goto loop; 1186 1187 case IOCOMPLETE: /* IO DONE, post-analyze */ 1188 untimeout(fdctimeout, fdc); 1189 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1190 #ifdef FD_DEBUG 1191 if (fdc_debug) { 1192 fdcstatus(&fd->sc_dk.dk_dev, 7, 1193 bp->b_flags & B_READ 1194 ? "read failed" : "write failed"); 1195 printf("blkno %d nblks %d tc %d\n", 1196 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1197 } 1198 #endif 1199 if (fdc->sc_nstat == 7 && 1200 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1201 1202 /* 1203 * Silently retry overruns if no other 1204 * error bit is set. Adjust threshold. 1205 */ 1206 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1207 if (thr < 15) { 1208 thr++; 1209 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1210 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1211 #ifdef FD_DEBUG 1212 if (fdc_debug) 1213 printf("fdc: %d -> threshold\n", thr); 1214 #endif 1215 fdconf(fdc); 1216 fdc->sc_state = DOIO; 1217 fdc->sc_overruns = 0; 1218 } 1219 if (++fdc->sc_overruns < 3) 1220 goto loop; 1221 } 1222 fdcretry(fdc); 1223 goto loop; 1224 } 1225 if (fdc->sc_errors) { 1226 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1227 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1228 printf("\n"); 1229 fdc->sc_errors = 0; 1230 } else { 1231 if (--fdc->sc_overruns < -20) { 1232 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1233 if (thr > 0) { 1234 thr--; 1235 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1236 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1237 #ifdef FD_DEBUG 1238 if (fdc_debug) 1239 printf("fdc: %d -> threshold\n", thr); 1240 #endif 1241 fdconf(fdc); 1242 } 1243 fdc->sc_overruns = 0; 1244 } 1245 } 1246 fd->sc_blkno += fd->sc_nblks; 1247 fd->sc_skip += fd->sc_nbytes; 1248 fd->sc_bcount -= fd->sc_nbytes; 1249 if (fd->sc_bcount > 0) { 1250 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1251 goto doseek; 1252 } 1253 fdfinish(fd, bp); 1254 goto loop; 1255 1256 case DORESET: 1257 doreset: 1258 /* try a reset, keep motor on */ 1259 fd_set_motor(fdc); 1260 delay(100); 1261 fdc_reset(fdc); 1262 fdc->sc_nstat = 0; 1263 fdc->sc_istate = ISTATE_SENSEI; 1264 fdc->sc_state = RESETCOMPLETE; 1265 timeout(fdctimeout, fdc, hz / 2); 1266 return 1; /* will return later */ 1267 1268 case RESETCOMPLETE: 1269 untimeout(fdctimeout, fdc); 1270 fdconf(fdc); 1271 1272 /* fall through */ 1273 case DORECAL: 1274 fdc->sc_state = RECALWAIT; 1275 fdc->sc_istate = ISTATE_SENSEI; 1276 fdc->sc_nstat = 0; 1277 /* recalibrate function */ 1278 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1279 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1280 timeout(fdctimeout, fdc, 5 * hz); 1281 return 1; /* will return later */ 1282 1283 case RECALWAIT: 1284 untimeout(fdctimeout, fdc); 1285 fdc->sc_state = RECALCOMPLETE; 1286 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1287 /* allow 1/30 second for heads to settle */ 1288 timeout(fdcpseudointr, fdc, hz / 30); 1289 return 1; /* will return later */ 1290 } 1291 1292 case RECALCOMPLETE: 1293 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1294 #ifdef FD_DEBUG 1295 if (fdc_debug) 1296 fdcstatus(&fd->sc_dk.dk_dev, 2, "recalibrate failed"); 1297 #endif 1298 fdcretry(fdc); 1299 goto loop; 1300 } 1301 fd->sc_cylin = 0; 1302 goto doseek; 1303 1304 case MOTORWAIT: 1305 if (fd->sc_flags & FD_MOTOR_WAIT) 1306 return 1; /* time's not up yet */ 1307 goto doseek; 1308 1309 default: 1310 fdcstatus(&fd->sc_dk.dk_dev, 0, "stray interrupt"); 1311 return 1; 1312 } 1313 #ifdef DIAGNOSTIC 1314 panic("fdcintr: impossible"); 1315 #endif 1316 #undef st0 1317 #undef st1 1318 #undef cyl 1319 } 1320 1321 void 1322 fdcretry(fdc) 1323 struct fdc_softc *fdc; 1324 { 1325 struct fd_softc *fd; 1326 struct buf *bp; 1327 1328 fd = fdc->sc_drives.tqh_first; 1329 bp = fd->sc_q.b_actf; 1330 1331 fdc->sc_overruns = 0; 1332 1333 switch (fdc->sc_errors) { 1334 case 0: 1335 /* try again */ 1336 fdc->sc_state = 1337 (fdc->sc_flags & FDC_EIS) ? DOIO : SEEKCOMPLETE; 1338 break; 1339 1340 case 1: case 2: case 3: 1341 /* didn't work; try recalibrating */ 1342 fdc->sc_state = DORECAL; 1343 break; 1344 1345 case 4: 1346 /* still no go; reset the bastard */ 1347 fdc->sc_state = DORESET; 1348 break; 1349 1350 default: 1351 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1352 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1353 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 1354 fdc->sc_status[0], NE7_ST0BITS, 1355 fdc->sc_status[1], NE7_ST1BITS, 1356 fdc->sc_status[2], NE7_ST2BITS, 1357 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1358 1359 bp->b_flags |= B_ERROR; 1360 bp->b_error = EIO; 1361 fdfinish(fd, bp); 1362 } 1363 fdc->sc_errors++; 1364 } 1365 1366 int 1367 fdsize(dev) 1368 dev_t dev; 1369 { 1370 1371 /* Swapping to floppies would not make sense. */ 1372 return -1; 1373 } 1374 1375 int 1376 fddump() 1377 { 1378 1379 /* Not implemented. */ 1380 return EINVAL; 1381 } 1382 1383 int 1384 fdioctl(dev, cmd, addr, flag) 1385 dev_t dev; 1386 u_long cmd; 1387 caddr_t addr; 1388 int flag; 1389 { 1390 struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)]; 1391 struct disklabel buffer; 1392 int error; 1393 1394 switch (cmd) { 1395 case DIOCGDINFO: 1396 bzero(&fd->sc_dk.dk_label, sizeof(struct disklabel)); 1397 1398 fd->sc_dk.dk_label.d_secpercyl = fd->sc_type->seccyl; 1399 fd->sc_dk.dk_label.d_type = DTYPE_FLOPPY; 1400 fd->sc_dk.dk_label.d_secsize = FDC_BSIZE; 1401 1402 if (readdisklabel(dev, fdstrategy, 1403 &fd->sc_dk.dk_label, 1404 &fd->sc_dk.dk_cpulabel) != NULL) 1405 return EINVAL; 1406 1407 *(struct disklabel *)addr = fd->sc_dk.dk_label; 1408 return 0; 1409 1410 case DIOCWLABEL: 1411 if ((flag & FWRITE) == 0) 1412 return EBADF; 1413 /* XXX do something */ 1414 return 0; 1415 1416 case DIOCWDINFO: 1417 if ((flag & FWRITE) == 0) 1418 return EBADF; 1419 1420 error = setdisklabel(&fd->sc_dk.dk_label, 1421 (struct disklabel *)addr, 0, 1422 &fd->sc_dk.dk_cpulabel); 1423 if (error) 1424 return error; 1425 1426 error = writedisklabel(dev, fdstrategy, 1427 &fd->sc_dk.dk_label, 1428 &fd->sc_dk.dk_cpulabel); 1429 return error; 1430 1431 case FDIOCEJECT: 1432 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1433 delay(10); 1434 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1435 return 0; 1436 #ifdef DEBUG 1437 case _IO('f', 100): 1438 { 1439 int i; 1440 struct fdc_softc *fdc = (struct fdc_softc *) 1441 fd->sc_dk.dk_dev.dv_parent; 1442 1443 out_fdc(fdc, NE7CMD_DUMPREG); 1444 fdcresult(fdc); 1445 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1446 for (i = 0; i < fdc->sc_nstat; i++) 1447 printf(" %x", fdc->sc_status[i]); 1448 printf(">\n"); 1449 } 1450 1451 return 0; 1452 case _IOW('f', 101, int): 1453 ((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent)->sc_cfg &= 1454 ~CFG_THRHLD_MASK; 1455 ((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent)->sc_cfg |= 1456 (*(int *)addr & CFG_THRHLD_MASK); 1457 fdconf(fd->sc_dk.dk_dev.dv_parent); 1458 return 0; 1459 case _IO('f', 102): 1460 { 1461 int i; 1462 struct fdc_softc *fdc = (struct fdc_softc *) 1463 fd->sc_dk.dk_dev.dv_parent; 1464 out_fdc(fdc, NE7CMD_SENSEI); 1465 fdcresult(fdc); 1466 printf("sensei(%d regs): <", fdc->sc_nstat); 1467 for (i=0; i< fdc->sc_nstat; i++) 1468 printf(" 0x%x", fdc->sc_status[i]); 1469 } 1470 printf(">\n"); 1471 return 0; 1472 #endif 1473 default: 1474 return ENOTTY; 1475 } 1476 1477 #ifdef DIAGNOSTIC 1478 panic("fdioctl: impossible"); 1479 #endif 1480 } 1481
Indexes created Fri Oct 03 02:09:57 GMT 2025