1 /* $NetBSD: fd.c,v 1.37 1996/08/27 21:57:12 cgd 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/conf.h> 58 59 #include <dev/cons.h> 60 61 #include <machine/cpu.h> 62 #include <machine/autoconf.h> 63 #include <machine/conf.h> 64 65 #include <sparc/sparc/auxreg.h> 66 #include <sparc/dev/fdreg.h> 67 #include <sparc/dev/fdvar.h> 68 69 #define FDUNIT(dev) (minor(dev) / 8) 70 #define FDTYPE(dev) (minor(dev) % 8) 71 72 #define b_cylin b_resid 73 74 #define FD_DEBUG 75 #ifdef FD_DEBUG 76 int fdc_debug = 0; 77 #endif 78 79 enum fdc_state { 80 DEVIDLE = 0, 81 MOTORWAIT, 82 DOSEEK, 83 SEEKWAIT, 84 SEEKTIMEDOUT, 85 SEEKCOMPLETE, 86 DOIO, 87 IOCOMPLETE, 88 IOTIMEDOUT, 89 DORESET, 90 RESETCOMPLETE, 91 RESETTIMEDOUT, 92 DORECAL, 93 RECALWAIT, 94 RECALTIMEDOUT, 95 RECALCOMPLETE, 96 }; 97 98 /* software state, per controller */ 99 struct fdc_softc { 100 struct device sc_dev; /* boilerplate */ 101 struct intrhand sc_sih; 102 struct intrhand sc_hih; 103 caddr_t sc_reg; 104 struct fd_softc *sc_fd[4]; /* pointers to children */ 105 TAILQ_HEAD(drivehead, fd_softc) sc_drives; 106 enum fdc_state sc_state; 107 int sc_flags; 108 #define FDC_82077 0x01 109 #define FDC_NEEDHEADSETTLE 0x02 110 #define FDC_EIS 0x04 111 int sc_errors; /* number of retries so far */ 112 int sc_overruns; /* number of DMA overruns */ 113 int sc_cfg; /* current configuration */ 114 struct fdcio sc_io; 115 #define sc_reg_msr sc_io.fdcio_reg_msr 116 #define sc_reg_fifo sc_io.fdcio_reg_fifo 117 #define sc_reg_dor sc_io.fdcio_reg_dor 118 #define sc_reg_drs sc_io.fdcio_reg_msr 119 #define sc_istate sc_io.fdcio_istate 120 #define sc_data sc_io.fdcio_data 121 #define sc_tc sc_io.fdcio_tc 122 #define sc_nstat sc_io.fdcio_nstat 123 #define sc_status sc_io.fdcio_status 124 #define sc_intrcnt sc_io.fdcio_intrcnt 125 }; 126 127 #ifndef FDC_C_HANDLER 128 extern struct fdcio *fdciop; 129 #endif 130 131 /* controller driver configuration */ 132 int fdcmatch __P((struct device *, void *, void *)); 133 void fdcattach __P((struct device *, struct device *, void *)); 134 135 struct cfattach fdc_ca = { 136 sizeof(struct fdc_softc), fdcmatch, fdcattach 137 }; 138 139 struct cfdriver fdc_cd = { 140 NULL, "fdc", DV_DULL 141 }; 142 143 __inline struct fd_type *fd_dev_to_type __P((struct fd_softc *, dev_t)); 144 145 /* 146 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 147 * we tell them apart. 148 */ 149 struct fd_type { 150 int sectrac; /* sectors per track */ 151 int heads; /* number of heads */ 152 int seccyl; /* sectors per cylinder */ 153 int secsize; /* size code for sectors */ 154 int datalen; /* data len when secsize = 0 */ 155 int steprate; /* step rate and head unload time */ 156 int gap1; /* gap len between sectors */ 157 int gap2; /* formatting gap */ 158 int tracks; /* total num of tracks */ 159 int size; /* size of disk in sectors */ 160 int step; /* steps per cylinder */ 161 int rate; /* transfer speed code */ 162 char *name; 163 }; 164 165 /* The order of entries in the following table is important -- BEWARE! */ 166 struct fd_type fd_types[] = { 167 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */ 168 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,"1.2MB" }, /* 1.2 MB AT-diskettes */ 169 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,"360KB/AT" }, /* 360kB in 1.2MB drive */ 170 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,"360KB/PC" }, /* 360kB PC diskettes */ 171 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,"720KB" }, /* 3.5" 720kB diskette */ 172 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,"720KB/x" }, /* 720kB in 1.2MB drive */ 173 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,"360KB/x" }, /* 360kB in 720kB drive */ 174 }; 175 176 /* software state, per disk (with up to 4 disks per ctlr) */ 177 struct fd_softc { 178 struct device sc_dv; /* generic device info */ 179 struct disk sc_dk; /* generic disk info */ 180 181 struct fd_type *sc_deftype; /* default type descriptor */ 182 struct fd_type *sc_type; /* current type descriptor */ 183 184 daddr_t sc_blkno; /* starting block number */ 185 int sc_bcount; /* byte count left */ 186 int sc_skip; /* bytes already transferred */ 187 int sc_nblks; /* number of blocks currently tranferring */ 188 int sc_nbytes; /* number of bytes currently tranferring */ 189 190 int sc_drive; /* physical unit number */ 191 int sc_flags; 192 #define FD_OPEN 0x01 /* it's open */ 193 #define FD_MOTOR 0x02 /* motor should be on */ 194 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 195 int sc_cylin; /* where we think the head is */ 196 197 void *sc_sdhook; /* shutdownhook cookie */ 198 199 TAILQ_ENTRY(fd_softc) sc_drivechain; 200 int sc_ops; /* I/O ops since last switch */ 201 struct buf sc_q; /* head of buf chain */ 202 }; 203 204 /* floppy driver configuration */ 205 int fdmatch __P((struct device *, void *, void *)); 206 void fdattach __P((struct device *, struct device *, void *)); 207 208 struct cfattach fd_ca = { 209 sizeof(struct fd_softc), fdmatch, fdattach 210 }; 211 212 struct cfdriver fd_cd = { 213 NULL, "fd", DV_DISK 214 }; 215 216 void fdgetdisklabel __P((dev_t)); 217 int fd_get_parms __P((struct fd_softc *)); 218 void fdstrategy __P((struct buf *)); 219 void fdstart __P((struct fd_softc *)); 220 int fdprint __P((void *, const char *)); 221 222 struct dkdriver fddkdriver = { fdstrategy }; 223 224 struct fd_type *fd_nvtotype __P((char *, int, int)); 225 void fd_set_motor __P((struct fdc_softc *fdc)); 226 void fd_motor_off __P((void *arg)); 227 void fd_motor_on __P((void *arg)); 228 int fdcresult __P((struct fdc_softc *fdc)); 229 int out_fdc __P((struct fdc_softc *fdc, u_char x)); 230 void fdcstart __P((struct fdc_softc *fdc)); 231 void fdcstatus __P((struct device *dv, int n, char *s)); 232 void fdc_reset __P((struct fdc_softc *fdc)); 233 void fdctimeout __P((void *arg)); 234 void fdcpseudointr __P((void *arg)); 235 #ifdef FDC_C_HANDLER 236 int fdchwintr __P((struct fdc_softc *)); 237 #else 238 void fdchwintr __P((void)); 239 #endif 240 int fdcswintr __P((struct fdc_softc *)); 241 void fdcretry __P((struct fdc_softc *fdc)); 242 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 243 void fd_do_eject __P((void)); 244 void fd_mountroot_hook __P((struct device *)); 245 static void fdconf __P((struct fdc_softc *)); 246 247 #if PIL_FDSOFT == 4 248 #define IE_FDSOFT IE_L4 249 #else 250 #error 4 251 #endif 252 253 #define OBP_FDNAME (CPU_ISSUN4M ? "SUNW,fdtwo" : "fd") 254 255 int 256 fdcmatch(parent, match, aux) 257 struct device *parent; 258 void *match, *aux; 259 { 260 register struct confargs *ca = aux; 261 register struct romaux *ra = &ca->ca_ra; 262 263 /* 264 * Floppy doesn't exist on sun4. 265 */ 266 if (CPU_ISSUN4) 267 return (0); 268 269 /* 270 * Floppy controller is on mainbus on sun4c. 271 */ 272 if ((CPU_ISSUN4C) && (ca->ca_bustype != BUS_MAIN)) 273 return (0); 274 275 /* 276 * Floppy controller is on obio on sun4m. 277 */ 278 if ((CPU_ISSUN4M) && (ca->ca_bustype != BUS_OBIO)) 279 return (0); 280 281 /* Sun PROMs call the controller an "fd" or "SUNW,fdtwo" */ 282 if (strcmp(OBP_FDNAME, ra->ra_name)) 283 return (0); 284 285 if (ca->ca_ra.ra_vaddr && 286 probeget(ca->ca_ra.ra_vaddr, 1) == -1) { 287 return (0); 288 } 289 290 return (1); 291 } 292 293 /* 294 * Arguments passed between fdcattach and fdprobe. 295 */ 296 struct fdc_attach_args { 297 int fa_drive; 298 struct bootpath *fa_bootpath; 299 struct fd_type *fa_deftype; 300 }; 301 302 /* 303 * Print the location of a disk drive (called just before attaching the 304 * the drive). If `fdc' is not NULL, the drive was found but was not 305 * in the system config file; print the drive name as well. 306 * Return QUIET (config_find ignores this if the device was configured) to 307 * avoid printing `fdN not configured' messages. 308 */ 309 int 310 fdprint(aux, fdc) 311 void *aux; 312 const char *fdc; 313 { 314 register struct fdc_attach_args *fa = aux; 315 316 if (!fdc) 317 printf(" drive %d", fa->fa_drive); 318 return QUIET; 319 } 320 321 static void 322 fdconf(fdc) 323 struct fdc_softc *fdc; 324 { 325 int vroom; 326 327 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 328 return; 329 330 /* 331 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 332 * the PROM thinks is appropriate. 333 */ 334 if ((vroom = fdc->sc_status[7]) == 0) 335 vroom = 0x64; 336 337 /* Configure controller to use FIFO and Implied Seek */ 338 out_fdc(fdc, NE7CMD_CFG); 339 out_fdc(fdc, vroom); 340 out_fdc(fdc, fdc->sc_cfg); 341 out_fdc(fdc, 0); /* PRETRK */ 342 /* No result phase */ 343 } 344 345 void 346 fdcattach(parent, self, aux) 347 struct device *parent, *self; 348 void *aux; 349 { 350 register struct confargs *ca = aux; 351 struct fdc_softc *fdc = (void *)self; 352 struct fdc_attach_args fa; 353 struct bootpath *bp; 354 int pri; 355 char code; 356 357 if (ca->ca_ra.ra_vaddr) 358 fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr; 359 else 360 fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_reg, 0, 361 ca->ca_ra.ra_len, 362 ca->ca_bustype); 363 364 fdc->sc_state = DEVIDLE; 365 fdc->sc_istate = ISTATE_IDLE; 366 fdc->sc_flags |= FDC_EIS; 367 TAILQ_INIT(&fdc->sc_drives); 368 369 pri = ca->ca_ra.ra_intr[0].int_pri; 370 #ifdef FDC_C_HANDLER 371 fdc->sc_hih.ih_fun = (void *)fdchwintr; 372 fdc->sc_hih.ih_arg = fdc; 373 intr_establish(pri, &fdc->sc_hih); 374 #else 375 fdciop = &fdc->sc_io; 376 intr_fasttrap(pri, fdchwintr); 377 #endif 378 fdc->sc_sih.ih_fun = (void *)fdcswintr; 379 fdc->sc_sih.ih_arg = fdc; 380 intr_establish(PIL_FDSOFT, &fdc->sc_sih); 381 382 /* Assume a 82077 */ 383 fdc->sc_reg_msr = &((struct fdreg_77 *)fdc->sc_reg)->fd_msr; 384 fdc->sc_reg_fifo = &((struct fdreg_77 *)fdc->sc_reg)->fd_fifo; 385 fdc->sc_reg_dor = &((struct fdreg_77 *)fdc->sc_reg)->fd_dor; 386 387 code = '7'; 388 if (*fdc->sc_reg_dor == NE7_RQM) { 389 /* 390 * This hack from Chris Torek: apparently DOR really 391 * addresses MSR/DRS on a 82072. 392 * We used to rely on the VERSION command to tell the 393 * difference (which did not work). 394 */ 395 *fdc->sc_reg_dor = FDC_250KBPS; 396 if (*fdc->sc_reg_dor == NE7_RQM) 397 code = '2'; 398 } 399 if (code == '7') { 400 fdc->sc_flags |= FDC_82077; 401 } else { 402 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 403 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 404 fdc->sc_reg_dor = 0; 405 } 406 407 #ifdef FD_DEBUG 408 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 409 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 410 if (fdc_debug) 411 printf("[version cmd]"); 412 } 413 #endif 414 415 /* 416 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 417 * Note: CFG_EFIFO is active-low, initial threshold value: 8 418 */ 419 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 420 fdconf(fdc); 421 422 if (fdc->sc_flags & FDC_82077) { 423 /* Lock configuration across soft resets. */ 424 out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK); 425 if (fdcresult(fdc) != 1) 426 printf(" CFGLOCK: unexpected response"); 427 } 428 429 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 430 431 printf(" pri %d, softpri %d: chip 8207%c\n", pri, PIL_FDSOFT, code); 432 433 /* 434 * Controller and drives are represented by one and the same 435 * Openprom node, so we can as well check for the floppy boots here. 436 */ 437 fa.fa_bootpath = 0; 438 if ((bp = ca->ca_ra.ra_bp) && strcmp(bp->name, OBP_FDNAME) == 0) { 439 440 switch (ca->ca_bustype) { 441 case BUS_MAIN: 442 /* 443 * We can get the bootpath in several different 444 * formats! The faked v1 bootpath looks like /fd@0,0. 445 * The v2 bootpath is either just /fd0, in which case 446 * `bp->val[0]' will have been set to -1, or /fd@x,y 447 * where <x,y> is the prom address specifier. 448 */ 449 if (((bp->val[0] == ca->ca_ra.ra_iospace) && 450 (bp->val[1] == (int)ca->ca_ra.ra_paddr)) || 451 452 ((bp->val[0] == -1) && /* v2: /fd0 */ 453 (bp->val[1] == 0)) || 454 455 ((bp->val[0] == 0) && /* v1: /fd@0,0 */ 456 (bp->val[1] == 0)) 457 ) 458 fa.fa_bootpath = bp; 459 break; 460 461 case BUS_OBIO: 462 /* 463 * floppy controller on obio (such as on the sun4m), 464 * e.g.: `/obio0/SUNW,fdtwo@0,700000'. 465 * We use "slot, offset" to determine if this is the 466 * right one. 467 */ 468 if ((bp->val[0] == ca->ca_slot) && 469 (bp->val[1] == ca->ca_offset)) 470 fa.fa_bootpath = bp; 471 break; 472 } 473 474 } 475 476 /* physical limit: four drives per controller. */ 477 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 478 fa.fa_deftype = NULL; /* unknown */ 479 fa.fa_deftype = &fd_types[0]; /* XXX */ 480 (void)config_found(self, (void *)&fa, fdprint); 481 } 482 483 bootpath_store(1, NULL); 484 } 485 486 int 487 fdmatch(parent, match, aux) 488 struct device *parent; 489 void *match, *aux; 490 { 491 struct fdc_softc *fdc = (void *)parent; 492 struct fdc_attach_args *fa = aux; 493 int drive = fa->fa_drive; 494 int n, ok; 495 496 if (drive > 0) 497 /* XXX - for now, punt > 1 drives */ 498 return 0; 499 500 if (fdc->sc_flags & FDC_82077) { 501 /* select drive and turn on motor */ 502 *fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive); 503 /* wait for motor to spin up */ 504 delay(250000); 505 } else { 506 auxregbisc(AUXIO_FDS, 0); 507 } 508 fdc->sc_nstat = 0; 509 out_fdc(fdc, NE7CMD_RECAL); 510 out_fdc(fdc, drive); 511 /* wait for recalibrate */ 512 for (n = 0; n < 10000; n++) { 513 delay(1000); 514 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 515 /* wait a bit longer till device *really* is ready */ 516 delay(100000); 517 if (out_fdc(fdc, NE7CMD_SENSEI)) 518 break; 519 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 520 /* 521 * Got `invalid command'; we interpret it 522 * to mean that the re-calibrate hasn't in 523 * fact finished yet 524 */ 525 continue; 526 break; 527 } 528 } 529 n = fdc->sc_nstat; 530 #ifdef FD_DEBUG 531 if (fdc_debug) { 532 int i; 533 printf("fdprobe: %d stati:", n); 534 for (i = 0; i < n; i++) 535 printf(" %x", fdc->sc_status[i]); 536 printf("\n"); 537 } 538 #endif 539 ok = (n == 2 && (fdc->sc_status[0] & 0xf8) == 0x20) ? 1 : 0; 540 541 /* turn off motor */ 542 if (fdc->sc_flags & FDC_82077) { 543 /* select drive and turn on motor */ 544 *fdc->sc_reg_dor = FDO_FRST; 545 } else { 546 auxregbisc(0, AUXIO_FDS); 547 } 548 549 return ok; 550 } 551 552 /* 553 * Controller is working, and drive responded. Attach it. 554 */ 555 void 556 fdattach(parent, self, aux) 557 struct device *parent, *self; 558 void *aux; 559 { 560 struct fdc_softc *fdc = (void *)parent; 561 struct fd_softc *fd = (void *)self; 562 struct fdc_attach_args *fa = aux; 563 struct fd_type *type = fa->fa_deftype; 564 int drive = fa->fa_drive; 565 566 /* XXX Allow `flags' to override device type? */ 567 568 if (type) 569 printf(": %s %d cyl, %d head, %d sec\n", type->name, 570 type->tracks, type->heads, type->sectrac); 571 else 572 printf(": density unknown\n"); 573 574 fd->sc_cylin = -1; 575 fd->sc_drive = drive; 576 fd->sc_deftype = type; 577 fdc->sc_fd[drive] = fd; 578 579 /* 580 * Initialize and attach the disk structure. 581 */ 582 fd->sc_dk.dk_name = fd->sc_dv.dv_xname; 583 fd->sc_dk.dk_driver = &fddkdriver; 584 disk_attach(&fd->sc_dk); 585 586 /* 587 * We're told if we're the boot device in fdcattach(). 588 */ 589 if (fa->fa_bootpath) 590 fa->fa_bootpath->dev = &fd->sc_dv; 591 592 /* 593 * Establish a mountroot_hook anyway in case we booted 594 * with RB_ASKNAME and get selected as the boot device. 595 */ 596 mountroot_hook_establish(fd_mountroot_hook, &fd->sc_dv); 597 598 /* Make sure the drive motor gets turned off at shutdown time. */ 599 fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd); 600 601 /* XXX Need to do some more fiddling with sc_dk. */ 602 dk_establish(&fd->sc_dk, &fd->sc_dv); 603 } 604 605 __inline struct fd_type * 606 fd_dev_to_type(fd, dev) 607 struct fd_softc *fd; 608 dev_t dev; 609 { 610 int type = FDTYPE(dev); 611 612 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 613 return NULL; 614 return type ? &fd_types[type - 1] : fd->sc_deftype; 615 } 616 617 void 618 fdstrategy(bp) 619 register struct buf *bp; /* IO operation to perform */ 620 { 621 struct fd_softc *fd; 622 int unit = FDUNIT(bp->b_dev); 623 int sz; 624 int s; 625 626 /* Valid unit, controller, and request? */ 627 if (unit >= fd_cd.cd_ndevs || 628 (fd = fd_cd.cd_devs[unit]) == 0 || 629 bp->b_blkno < 0 || 630 (bp->b_bcount % FDC_BSIZE) != 0) { 631 bp->b_error = EINVAL; 632 goto bad; 633 } 634 635 /* If it's a null transfer, return immediately. */ 636 if (bp->b_bcount == 0) 637 goto done; 638 639 sz = howmany(bp->b_bcount, FDC_BSIZE); 640 641 if (bp->b_blkno + sz > fd->sc_type->size) { 642 sz = fd->sc_type->size - bp->b_blkno; 643 if (sz == 0) { 644 /* If exactly at end of disk, return EOF. */ 645 bp->b_resid = bp->b_bcount; 646 goto done; 647 } 648 if (sz < 0) { 649 /* If past end of disk, return EINVAL. */ 650 bp->b_error = EINVAL; 651 goto bad; 652 } 653 /* Otherwise, truncate request. */ 654 bp->b_bcount = sz << DEV_BSHIFT; 655 } 656 657 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 658 659 #ifdef FD_DEBUG 660 if (fdc_debug > 1) 661 printf("fdstrategy: b_blkno %d b_bcount %ld blkno %d cylin %ld\n", 662 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 663 #endif 664 665 /* Queue transfer on drive, activate drive and controller if idle. */ 666 s = splbio(); 667 disksort(&fd->sc_q, bp); 668 untimeout(fd_motor_off, fd); /* a good idea */ 669 if (!fd->sc_q.b_active) 670 fdstart(fd); 671 #ifdef DIAGNOSTIC 672 else { 673 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 674 if (fdc->sc_state == DEVIDLE) { 675 printf("fdstrategy: controller inactive\n"); 676 fdcstart(fdc); 677 } 678 } 679 #endif 680 splx(s); 681 return; 682 683 bad: 684 bp->b_flags |= B_ERROR; 685 done: 686 /* Toss transfer; we're done early. */ 687 biodone(bp); 688 } 689 690 void 691 fdstart(fd) 692 struct fd_softc *fd; 693 { 694 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 695 int active = fdc->sc_drives.tqh_first != 0; 696 697 /* Link into controller queue. */ 698 fd->sc_q.b_active = 1; 699 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 700 701 /* If controller not already active, start it. */ 702 if (!active) 703 fdcstart(fdc); 704 } 705 706 void 707 fdfinish(fd, bp) 708 struct fd_softc *fd; 709 struct buf *bp; 710 { 711 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 712 713 /* 714 * Move this drive to the end of the queue to give others a `fair' 715 * chance. We only force a switch if N operations are completed while 716 * another drive is waiting to be serviced, since there is a long motor 717 * startup delay whenever we switch. 718 */ 719 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 720 fd->sc_ops = 0; 721 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 722 if (bp->b_actf) { 723 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 724 } else 725 fd->sc_q.b_active = 0; 726 } 727 bp->b_resid = fd->sc_bcount; 728 fd->sc_skip = 0; 729 fd->sc_q.b_actf = bp->b_actf; 730 731 biodone(bp); 732 /* turn off motor 5s from now */ 733 timeout(fd_motor_off, fd, 5 * hz); 734 fdc->sc_state = DEVIDLE; 735 } 736 737 void 738 fdc_reset(fdc) 739 struct fdc_softc *fdc; 740 { 741 if (fdc->sc_flags & FDC_82077) { 742 *fdc->sc_reg_dor = FDO_MOEN(0); 743 } 744 745 *fdc->sc_reg_drs = DRS_RESET; 746 delay(10); 747 *fdc->sc_reg_drs = 0; 748 #ifdef FD_DEBUG 749 if (fdc_debug) 750 printf("fdc reset\n"); 751 #endif 752 } 753 754 void 755 fd_set_motor(fdc) 756 struct fdc_softc *fdc; 757 { 758 struct fd_softc *fd; 759 u_char status; 760 int n; 761 762 if (fdc->sc_flags & FDC_82077) { 763 status = FDO_FRST | FDO_FDMAEN; 764 if ((fd = fdc->sc_drives.tqh_first) != NULL) 765 status |= fd->sc_drive; 766 767 for (n = 0; n < 4; n++) 768 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 769 status |= FDO_MOEN(n); 770 *fdc->sc_reg_dor = status; 771 } else { 772 int on = 0; 773 774 for (n = 0; n < 4; n++) 775 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 776 on = 1; 777 if (on) { 778 auxregbisc(AUXIO_FDS, 0); 779 } else { 780 auxregbisc(0, AUXIO_FDS); 781 } 782 } 783 } 784 785 void 786 fd_motor_off(arg) 787 void *arg; 788 { 789 struct fd_softc *fd = arg; 790 int s; 791 792 s = splbio(); 793 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 794 fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent); 795 splx(s); 796 } 797 798 void 799 fd_motor_on(arg) 800 void *arg; 801 { 802 struct fd_softc *fd = arg; 803 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 804 int s; 805 806 s = splbio(); 807 fd->sc_flags &= ~FD_MOTOR_WAIT; 808 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 809 (void) fdcswintr(fdc); 810 splx(s); 811 } 812 813 int 814 fdcresult(fdc) 815 struct fdc_softc *fdc; 816 { 817 u_char i; 818 int j = 100000, 819 n = 0; 820 821 for (; j; j--) { 822 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 823 if (i == NE7_RQM) 824 return (fdc->sc_nstat = n); 825 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 826 if (n >= sizeof(fdc->sc_status)) { 827 log(LOG_ERR, "fdcresult: overrun\n"); 828 return -1; 829 } 830 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 831 } 832 } 833 log(LOG_ERR, "fdcresult: timeout\n"); 834 return (fdc->sc_nstat = -1); 835 } 836 837 int 838 out_fdc(fdc, x) 839 struct fdc_softc *fdc; 840 u_char x; 841 { 842 int i = 100000; 843 844 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0); 845 if (i <= 0) 846 return -1; 847 848 *fdc->sc_reg_fifo = x; 849 return 0; 850 } 851 852 int 853 fdopen(dev, flags, fmt, p) 854 dev_t dev; 855 int flags, fmt; 856 struct proc *p; 857 { 858 int unit, pmask; 859 struct fd_softc *fd; 860 struct fd_type *type; 861 862 unit = FDUNIT(dev); 863 if (unit >= fd_cd.cd_ndevs) 864 return ENXIO; 865 fd = fd_cd.cd_devs[unit]; 866 if (fd == 0) 867 return ENXIO; 868 type = fd_dev_to_type(fd, dev); 869 if (type == NULL) 870 return ENXIO; 871 872 if ((fd->sc_flags & FD_OPEN) != 0 && 873 fd->sc_type != type) 874 return EBUSY; 875 876 fd->sc_type = type; 877 fd->sc_cylin = -1; 878 fd->sc_flags |= FD_OPEN; 879 880 /* 881 * Only update the disklabel if we're not open anywhere else. 882 */ 883 if (fd->sc_dk.dk_openmask == 0) 884 fdgetdisklabel(dev); 885 886 pmask = (1 << DISKPART(dev)); 887 888 switch (fmt) { 889 case S_IFCHR: 890 fd->sc_dk.dk_copenmask |= pmask; 891 break; 892 893 case S_IFBLK: 894 fd->sc_dk.dk_bopenmask |= pmask; 895 break; 896 } 897 fd->sc_dk.dk_openmask = 898 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 899 900 return 0; 901 } 902 903 int 904 fdclose(dev, flags, fmt, p) 905 dev_t dev; 906 int flags, fmt; 907 struct proc *p; 908 { 909 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 910 int pmask = (1 << DISKPART(dev)); 911 912 fd->sc_flags &= ~FD_OPEN; 913 914 switch (fmt) { 915 case S_IFCHR: 916 fd->sc_dk.dk_copenmask &= ~pmask; 917 break; 918 919 case S_IFBLK: 920 fd->sc_dk.dk_bopenmask &= ~pmask; 921 break; 922 } 923 fd->sc_dk.dk_openmask = 924 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 925 926 return 0; 927 } 928 929 int 930 fdread(dev, uio, flag) 931 dev_t dev; 932 struct uio *uio; 933 int flag; 934 { 935 936 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 937 } 938 939 int 940 fdwrite(dev, uio, flag) 941 dev_t dev; 942 struct uio *uio; 943 int flag; 944 { 945 946 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 947 } 948 949 void 950 fdcstart(fdc) 951 struct fdc_softc *fdc; 952 { 953 954 #ifdef DIAGNOSTIC 955 /* only got here if controller's drive queue was inactive; should 956 be in idle state */ 957 if (fdc->sc_state != DEVIDLE) { 958 printf("fdcstart: not idle\n"); 959 return; 960 } 961 #endif 962 (void) fdcswintr(fdc); 963 } 964 965 void 966 fdcstatus(dv, n, s) 967 struct device *dv; 968 int n; 969 char *s; 970 { 971 struct fdc_softc *fdc = (void *)dv->dv_parent; 972 #if 0 973 /* 974 * A 82072 seems to return <invalid command> on 975 * gratuitous Sense Interrupt commands. 976 */ 977 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 978 out_fdc(fdc, NE7CMD_SENSEI); 979 (void) fdcresult(fdc); 980 n = 2; 981 } 982 #endif 983 984 /* Just print last status */ 985 n = fdc->sc_nstat; 986 987 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 988 989 switch (n) { 990 case 0: 991 printf("\n"); 992 break; 993 case 2: 994 printf(" (st0 %b cyl %d)\n", 995 fdc->sc_status[0], NE7_ST0BITS, 996 fdc->sc_status[1]); 997 break; 998 case 7: 999 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 1000 fdc->sc_status[0], NE7_ST0BITS, 1001 fdc->sc_status[1], NE7_ST1BITS, 1002 fdc->sc_status[2], NE7_ST2BITS, 1003 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1004 break; 1005 #ifdef DIAGNOSTIC 1006 default: 1007 printf(" fdcstatus: weird size: %d\n", n); 1008 break; 1009 #endif 1010 } 1011 } 1012 1013 void 1014 fdctimeout(arg) 1015 void *arg; 1016 { 1017 struct fdc_softc *fdc = arg; 1018 struct fd_softc *fd = fdc->sc_drives.tqh_first; 1019 int s; 1020 1021 s = splbio(); 1022 fdcstatus(&fd->sc_dv, 0, "timeout"); 1023 1024 if (fd->sc_q.b_actf) 1025 fdc->sc_state++; 1026 else 1027 fdc->sc_state = DEVIDLE; 1028 1029 (void) fdcswintr(fdc); 1030 splx(s); 1031 } 1032 1033 void 1034 fdcpseudointr(arg) 1035 void *arg; 1036 { 1037 struct fdc_softc *fdc = arg; 1038 int s; 1039 1040 /* Just ensure it has the right spl. */ 1041 s = splbio(); 1042 (void) fdcswintr(fdc); 1043 splx(s); 1044 } 1045 1046 1047 #ifdef FDC_C_HANDLER 1048 /* 1049 * hardware interrupt entry point: must be converted to `fast' 1050 * (in-window) handler. 1051 */ 1052 int 1053 fdchwintr(fdc) 1054 struct fdc_softc *fdc; 1055 { 1056 struct buf *bp; 1057 int read; 1058 1059 switch (fdc->sc_istate) { 1060 case ISTATE_SENSEI: 1061 out_fdc(fdc, NE7CMD_SENSEI); 1062 fdcresult(fdc); 1063 fdc->sc_istate = ISTATE_IDLE; 1064 ienab_bis(IE_FDSOFT); 1065 return 1; 1066 case ISTATE_IDLE: 1067 case ISTATE_SPURIOUS: 1068 auxregbisc(0, AUXIO_FDS); /* Does this help? */ 1069 fdcresult(fdc); 1070 fdc->sc_istate = ISTATE_SPURIOUS; 1071 printf("fdc: stray hard interrupt... "); 1072 ienab_bis(IE_FDSOFT); 1073 return 1; 1074 case ISTATE_DMA: 1075 break; 1076 default: 1077 printf("fdc: goofed ...\n"); 1078 return 1; 1079 } 1080 1081 read = bp->b_flags & B_READ; 1082 for (;;) { 1083 register int msr; 1084 1085 msr = *fdc->sc_reg_msr; 1086 1087 if ((msr & NE7_RQM) == 0) 1088 break; 1089 1090 if ((msr & NE7_NDM) == 0) { 1091 fdcresult(fdc); 1092 fdc->sc_istate = ISTATE_IDLE; 1093 ienab_bis(IE_FDSOFT); 1094 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 1095 break; 1096 } 1097 1098 if (msr & NE7_DIO) { 1099 #ifdef DIAGNOSTIC 1100 if (!read) 1101 printf("fdxfer: false read\n"); 1102 #endif 1103 *fdc->sc_data++ = *fdc->sc_reg_fifo; 1104 } else { 1105 #ifdef DIAGNOSTIC 1106 if (read) 1107 printf("fdxfer: false write\n"); 1108 #endif 1109 *fdc->sc_reg_fifo = *fdc->sc_data++; 1110 } 1111 if (--fdc->sc_tc == 0) { 1112 auxregbisc(AUXIO_FTC, 0); 1113 fdc->sc_istate = ISTATE_IDLE; 1114 delay(10); 1115 auxregbisc(0, AUXIO_FTC); 1116 fdcresult(fdc); 1117 ienab_bis(IE_FDSOFT); 1118 break; 1119 } 1120 } 1121 return 1; 1122 } 1123 #endif 1124 1125 int 1126 fdcswintr(fdc) 1127 struct fdc_softc *fdc; 1128 { 1129 #define st0 fdc->sc_status[0] 1130 #define st1 fdc->sc_status[1] 1131 #define cyl fdc->sc_status[1] 1132 #define OUT_FDC(fdc, c, s) \ 1133 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1134 1135 struct fd_softc *fd; 1136 struct buf *bp; 1137 int read, head, sec, nblks; 1138 struct fd_type *type; 1139 1140 1141 if (fdc->sc_istate != ISTATE_IDLE) { 1142 /* Trouble... */ 1143 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1144 fdc->sc_state, fdc->sc_istate); 1145 fdc->sc_istate = ISTATE_IDLE; 1146 if (fdc->sc_state == RESETCOMPLETE || 1147 fdc->sc_state == RESETTIMEDOUT) { 1148 panic("fdcintr: spurious interrupt can't be cleared"); 1149 } 1150 goto doreset; 1151 } 1152 1153 loop: 1154 /* Is there a drive for the controller to do a transfer with? */ 1155 fd = fdc->sc_drives.tqh_first; 1156 if (fd == NULL) { 1157 fdc->sc_state = DEVIDLE; 1158 return 0; 1159 } 1160 1161 /* Is there a transfer to this drive? If not, deactivate drive. */ 1162 bp = fd->sc_q.b_actf; 1163 if (bp == NULL) { 1164 fd->sc_ops = 0; 1165 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1166 fd->sc_q.b_active = 0; 1167 goto loop; 1168 } 1169 1170 switch (fdc->sc_state) { 1171 case DEVIDLE: 1172 fdc->sc_errors = 0; 1173 fd->sc_skip = 0; 1174 fd->sc_bcount = bp->b_bcount; 1175 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1176 untimeout(fd_motor_off, fd); 1177 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1178 fdc->sc_state = MOTORWAIT; 1179 return 1; 1180 } 1181 if ((fd->sc_flags & FD_MOTOR) == 0) { 1182 /* Turn on the motor, being careful about pairing. */ 1183 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1184 if (ofd && ofd->sc_flags & FD_MOTOR) { 1185 untimeout(fd_motor_off, ofd); 1186 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1187 } 1188 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1189 fd_set_motor(fdc); 1190 fdc->sc_state = MOTORWAIT; 1191 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1192 /* Allow .25s for motor to stabilize. */ 1193 timeout(fd_motor_on, fd, hz / 4); 1194 } else { 1195 fd->sc_flags &= ~FD_MOTOR_WAIT; 1196 goto loop; 1197 } 1198 return 1; 1199 } 1200 /* Make sure the right drive is selected. */ 1201 fd_set_motor(fdc); 1202 1203 /* fall through */ 1204 case DOSEEK: 1205 doseek: 1206 if (fdc->sc_flags & FDC_EIS) { 1207 fd->sc_cylin = bp->b_cylin; 1208 /* We use implied seek */ 1209 goto doio; 1210 } 1211 1212 if (fd->sc_cylin == bp->b_cylin) 1213 goto doio; 1214 1215 /* specify command */ 1216 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1217 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1218 OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1219 1220 fdc->sc_istate = ISTATE_SENSEI; 1221 /* seek function */ 1222 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1223 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1224 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1225 1226 fd->sc_cylin = -1; 1227 fdc->sc_state = SEEKWAIT; 1228 fdc->sc_nstat = 0; 1229 1230 fd->sc_dk.dk_seek++; 1231 disk_busy(&fd->sc_dk); 1232 1233 timeout(fdctimeout, fdc, 4 * hz); 1234 return 1; 1235 1236 case DOIO: 1237 doio: 1238 type = fd->sc_type; 1239 sec = fd->sc_blkno % type->seccyl; 1240 nblks = type->seccyl - sec; 1241 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1242 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1243 fd->sc_nblks = nblks; 1244 fd->sc_nbytes = nblks * FDC_BSIZE; 1245 head = sec / type->sectrac; 1246 sec -= head * type->sectrac; 1247 #ifdef DIAGNOSTIC 1248 {int block; 1249 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1250 if (block != fd->sc_blkno) { 1251 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1252 #ifdef DDB 1253 Debugger(); 1254 #endif 1255 }} 1256 #endif 1257 read = bp->b_flags & B_READ; 1258 1259 /* Setup for pseudo DMA */ 1260 fdc->sc_data = bp->b_data + fd->sc_skip; 1261 fdc->sc_tc = fd->sc_nbytes; 1262 1263 *fdc->sc_reg_drs = type->rate; 1264 #ifdef FD_DEBUG 1265 if (fdc_debug > 1) 1266 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1267 read ? "read" : "write", fd->sc_drive, 1268 fd->sc_cylin, head, sec, nblks); 1269 #endif 1270 fdc->sc_state = IOCOMPLETE; 1271 fdc->sc_istate = ISTATE_DMA; 1272 fdc->sc_nstat = 0; 1273 if (read) 1274 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */ 1275 else 1276 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */ 1277 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1278 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */ 1279 OUT_FDC(fdc, head, IOTIMEDOUT); 1280 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */ 1281 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */ 1282 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */ 1283 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */ 1284 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */ 1285 1286 disk_busy(&fd->sc_dk); 1287 1288 /* allow 2 seconds for operation */ 1289 timeout(fdctimeout, fdc, 2 * hz); 1290 return 1; /* will return later */ 1291 1292 case SEEKWAIT: 1293 untimeout(fdctimeout, fdc); 1294 fdc->sc_state = SEEKCOMPLETE; 1295 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1296 /* allow 1/50 second for heads to settle */ 1297 timeout(fdcpseudointr, fdc, hz / 50); 1298 return 1; /* will return later */ 1299 } 1300 1301 case SEEKCOMPLETE: 1302 disk_unbusy(&fd->sc_dk, 0); /* no data on seek */ 1303 1304 /* Make sure seek really happened. */ 1305 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1306 cyl != bp->b_cylin * fd->sc_type->step) { 1307 #ifdef FD_DEBUG 1308 if (fdc_debug) 1309 fdcstatus(&fd->sc_dv, 2, "seek failed"); 1310 #endif 1311 fdcretry(fdc); 1312 goto loop; 1313 } 1314 fd->sc_cylin = bp->b_cylin; 1315 goto doio; 1316 1317 case IOTIMEDOUT: 1318 auxregbisc(AUXIO_FTC, 0); 1319 delay(10); 1320 auxregbisc(0, AUXIO_FTC); 1321 (void)fdcresult(fdc); 1322 case SEEKTIMEDOUT: 1323 case RECALTIMEDOUT: 1324 case RESETTIMEDOUT: 1325 fdcretry(fdc); 1326 goto loop; 1327 1328 case IOCOMPLETE: /* IO DONE, post-analyze */ 1329 untimeout(fdctimeout, fdc); 1330 1331 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid)); 1332 1333 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1334 #ifdef FD_DEBUG 1335 if (fdc_debug) { 1336 fdcstatus(&fd->sc_dv, 7, 1337 bp->b_flags & B_READ 1338 ? "read failed" : "write failed"); 1339 printf("blkno %d nblks %d tc %d\n", 1340 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1341 } 1342 #endif 1343 if (fdc->sc_nstat == 7 && 1344 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1345 1346 /* 1347 * Silently retry overruns if no other 1348 * error bit is set. Adjust threshold. 1349 */ 1350 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1351 if (thr < 15) { 1352 thr++; 1353 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1354 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1355 #ifdef FD_DEBUG 1356 if (fdc_debug) 1357 printf("fdc: %d -> threshold\n", thr); 1358 #endif 1359 fdconf(fdc); 1360 fdc->sc_overruns = 0; 1361 } 1362 if (++fdc->sc_overruns < 3) { 1363 fdc->sc_state = DOIO; 1364 goto loop; 1365 } 1366 } 1367 fdcretry(fdc); 1368 goto loop; 1369 } 1370 if (fdc->sc_errors) { 1371 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1372 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1373 printf("\n"); 1374 fdc->sc_errors = 0; 1375 } else { 1376 if (--fdc->sc_overruns < -20) { 1377 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1378 if (thr > 0) { 1379 thr--; 1380 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1381 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1382 #ifdef FD_DEBUG 1383 if (fdc_debug) 1384 printf("fdc: %d -> threshold\n", thr); 1385 #endif 1386 fdconf(fdc); 1387 } 1388 fdc->sc_overruns = 0; 1389 } 1390 } 1391 fd->sc_blkno += fd->sc_nblks; 1392 fd->sc_skip += fd->sc_nbytes; 1393 fd->sc_bcount -= fd->sc_nbytes; 1394 if (fd->sc_bcount > 0) { 1395 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1396 goto doseek; 1397 } 1398 fdfinish(fd, bp); 1399 goto loop; 1400 1401 case DORESET: 1402 doreset: 1403 /* try a reset, keep motor on */ 1404 fd_set_motor(fdc); 1405 delay(100); 1406 fdc_reset(fdc); 1407 fdc->sc_nstat = 0; 1408 fdc->sc_istate = ISTATE_SENSEI; 1409 fdc->sc_state = RESETCOMPLETE; 1410 timeout(fdctimeout, fdc, hz / 2); 1411 return 1; /* will return later */ 1412 1413 case RESETCOMPLETE: 1414 untimeout(fdctimeout, fdc); 1415 fdconf(fdc); 1416 1417 /* fall through */ 1418 case DORECAL: 1419 fdc->sc_state = RECALWAIT; 1420 fdc->sc_istate = ISTATE_SENSEI; 1421 fdc->sc_nstat = 0; 1422 /* recalibrate function */ 1423 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1424 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1425 timeout(fdctimeout, fdc, 5 * hz); 1426 return 1; /* will return later */ 1427 1428 case RECALWAIT: 1429 untimeout(fdctimeout, fdc); 1430 fdc->sc_state = RECALCOMPLETE; 1431 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1432 /* allow 1/30 second for heads to settle */ 1433 timeout(fdcpseudointr, fdc, hz / 30); 1434 return 1; /* will return later */ 1435 } 1436 1437 case RECALCOMPLETE: 1438 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1439 #ifdef FD_DEBUG 1440 if (fdc_debug) 1441 fdcstatus(&fd->sc_dv, 2, "recalibrate failed"); 1442 #endif 1443 fdcretry(fdc); 1444 goto loop; 1445 } 1446 fd->sc_cylin = 0; 1447 goto doseek; 1448 1449 case MOTORWAIT: 1450 if (fd->sc_flags & FD_MOTOR_WAIT) 1451 return 1; /* time's not up yet */ 1452 goto doseek; 1453 1454 default: 1455 fdcstatus(&fd->sc_dv, 0, "stray interrupt"); 1456 return 1; 1457 } 1458 #ifdef DIAGNOSTIC 1459 panic("fdcintr: impossible"); 1460 #endif 1461 #undef st0 1462 #undef st1 1463 #undef cyl 1464 } 1465 1466 void 1467 fdcretry(fdc) 1468 struct fdc_softc *fdc; 1469 { 1470 struct fd_softc *fd; 1471 struct buf *bp; 1472 1473 fd = fdc->sc_drives.tqh_first; 1474 bp = fd->sc_q.b_actf; 1475 1476 fdc->sc_overruns = 0; 1477 1478 switch (fdc->sc_errors) { 1479 case 0: 1480 /* try again */ 1481 fdc->sc_state = 1482 (fdc->sc_flags & FDC_EIS) ? DOIO : DOSEEK; 1483 break; 1484 1485 case 1: case 2: case 3: 1486 /* didn't work; try recalibrating */ 1487 fdc->sc_state = DORECAL; 1488 break; 1489 1490 case 4: 1491 /* still no go; reset the bastard */ 1492 fdc->sc_state = DORESET; 1493 break; 1494 1495 default: 1496 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1497 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1498 1499 printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n", 1500 fdc->sc_status[0], NE7_ST0BITS, 1501 fdc->sc_status[1], NE7_ST1BITS, 1502 fdc->sc_status[2], NE7_ST2BITS, 1503 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1504 1505 bp->b_flags |= B_ERROR; 1506 bp->b_error = EIO; 1507 fdfinish(fd, bp); 1508 } 1509 fdc->sc_errors++; 1510 } 1511 1512 int 1513 fdsize(dev) 1514 dev_t dev; 1515 { 1516 1517 /* Swapping to floppies would not make sense. */ 1518 return -1; 1519 } 1520 1521 int 1522 fddump(dev, blkno, va, size) 1523 dev_t dev; 1524 daddr_t blkno; 1525 caddr_t va; 1526 size_t size; 1527 { 1528 1529 /* Not implemented. */ 1530 return EINVAL; 1531 } 1532 1533 int 1534 fdioctl(dev, cmd, addr, flag, p) 1535 dev_t dev; 1536 u_long cmd; 1537 caddr_t addr; 1538 int flag; 1539 struct proc *p; 1540 { 1541 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 1542 int error; 1543 1544 switch (cmd) { 1545 case DIOCGDINFO: 1546 *(struct disklabel *)addr = *(fd->sc_dk.dk_label); 1547 return 0; 1548 1549 case DIOCWLABEL: 1550 if ((flag & FWRITE) == 0) 1551 return EBADF; 1552 /* XXX do something */ 1553 return 0; 1554 1555 case DIOCWDINFO: 1556 if ((flag & FWRITE) == 0) 1557 return EBADF; 1558 1559 error = setdisklabel(fd->sc_dk.dk_label, 1560 (struct disklabel *)addr, 0, 1561 fd->sc_dk.dk_cpulabel); 1562 if (error) 1563 return error; 1564 1565 error = writedisklabel(dev, fdstrategy, 1566 fd->sc_dk.dk_label, 1567 fd->sc_dk.dk_cpulabel); 1568 return error; 1569 1570 case DIOCLOCK: 1571 /* 1572 * Nothing to do here, really. 1573 */ 1574 return 0; 1575 1576 case DIOCEJECT: 1577 fd_do_eject(); 1578 return 0; 1579 1580 #ifdef DEBUG 1581 case _IO('f', 100): 1582 { 1583 int i; 1584 struct fdc_softc *fdc = (struct fdc_softc *) 1585 fd->sc_dv.dv_parent; 1586 1587 out_fdc(fdc, NE7CMD_DUMPREG); 1588 fdcresult(fdc); 1589 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1590 for (i = 0; i < fdc->sc_nstat; i++) 1591 printf(" %x", fdc->sc_status[i]); 1592 printf(">\n"); 1593 } 1594 1595 return 0; 1596 case _IOW('f', 101, int): 1597 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg &= 1598 ~CFG_THRHLD_MASK; 1599 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |= 1600 (*(int *)addr & CFG_THRHLD_MASK); 1601 fdconf((struct fdc_softc *) fd->sc_dv.dv_parent); 1602 return 0; 1603 case _IO('f', 102): 1604 { 1605 int i; 1606 struct fdc_softc *fdc = (struct fdc_softc *) 1607 fd->sc_dv.dv_parent; 1608 out_fdc(fdc, NE7CMD_SENSEI); 1609 fdcresult(fdc); 1610 printf("sensei(%d regs): <", fdc->sc_nstat); 1611 for (i=0; i< fdc->sc_nstat; i++) 1612 printf(" 0x%x", fdc->sc_status[i]); 1613 } 1614 printf(">\n"); 1615 return 0; 1616 #endif 1617 default: 1618 return ENOTTY; 1619 } 1620 1621 #ifdef DIAGNOSTIC 1622 panic("fdioctl: impossible"); 1623 #endif 1624 } 1625 1626 void 1627 fdgetdisklabel(dev) 1628 dev_t dev; 1629 { 1630 int unit = FDUNIT(dev), i; 1631 struct fd_softc *fd = fd_cd.cd_devs[unit]; 1632 struct disklabel *lp = fd->sc_dk.dk_label; 1633 struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel; 1634 1635 bzero(lp, sizeof(struct disklabel)); 1636 bzero(lp, sizeof(struct cpu_disklabel)); 1637 1638 lp->d_type = DTYPE_FLOPPY; 1639 lp->d_secsize = FDC_BSIZE; 1640 lp->d_secpercyl = fd->sc_type->seccyl; 1641 lp->d_nsectors = fd->sc_type->sectrac; 1642 lp->d_ncylinders = fd->sc_type->tracks; 1643 lp->d_ntracks = fd->sc_type->heads; /* Go figure... */ 1644 lp->d_rpm = 3600; /* XXX like it matters... */ 1645 1646 strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename)); 1647 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 1648 lp->d_interleave = 1; 1649 1650 lp->d_partitions[RAW_PART].p_offset = 0; 1651 lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders; 1652 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1653 lp->d_npartitions = RAW_PART + 1; 1654 1655 lp->d_magic = DISKMAGIC; 1656 lp->d_magic2 = DISKMAGIC; 1657 lp->d_checksum = dkcksum(lp); 1658 1659 /* 1660 * Call the generic disklabel extraction routine. If there's 1661 * not a label there, fake it. 1662 */ 1663 if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) { 1664 strncpy(lp->d_packname, "default label", 1665 sizeof(lp->d_packname)); 1666 /* 1667 * Reset the partition info; it might have gotten 1668 * trashed in readdisklabel(). 1669 * 1670 * XXX Why do we have to do this? readdisklabel() 1671 * should be safe... 1672 */ 1673 for (i = 0; i < MAXPARTITIONS; ++i) { 1674 lp->d_partitions[i].p_offset = 0; 1675 if (i == RAW_PART) { 1676 lp->d_partitions[i].p_size = 1677 lp->d_secpercyl * lp->d_ncylinders; 1678 lp->d_partitions[i].p_fstype = FS_BSDFFS; 1679 } else { 1680 lp->d_partitions[i].p_size = 0; 1681 lp->d_partitions[i].p_fstype = FS_UNUSED; 1682 } 1683 } 1684 lp->d_npartitions = RAW_PART + 1; 1685 } 1686 } 1687 1688 void 1689 fd_do_eject() 1690 { 1691 1692 auxregbisc(AUXIO_FDS, AUXIO_FEJ); 1693 delay(10); 1694 auxregbisc(AUXIO_FEJ, AUXIO_FDS); 1695 } 1696 1697 #ifdef RAMDISK_HOOKS 1698 int fd_read_rd_image __P((size_t *, caddr_t *)); 1699 #endif 1700 1701 /* ARGSUSED */ 1702 void 1703 fd_mountroot_hook(dev) 1704 struct device *dev; 1705 { 1706 int c; 1707 1708 fd_do_eject(); 1709 printf("Insert filesystem floppy and press return."); 1710 for (;;) { 1711 c = cngetc(); 1712 if ((c == '\r') || (c == '\n')) { 1713 printf("\n"); 1714 break; 1715 } 1716 } 1717 #ifdef RAMDISK_HOOKS 1718 { 1719 extern int (*rd_read_image) __P((size_t *, caddr_t *)); 1720 rd_read_image = fd_read_rd_image; 1721 } 1722 #endif 1723 } 1724 1725 #ifdef RAMDISK_HOOKS 1726 #include <sys/malloc.h> 1727 #include <sys/proc.h> 1728 1729 #define FDMICROROOTSIZE ((2*18*80) << DEV_BSHIFT) 1730 1731 int 1732 fd_read_rd_image(sizep, addrp) 1733 size_t *sizep; 1734 caddr_t *addrp; 1735 { 1736 struct buf buf, *bp = &buf; 1737 dev_t dev; 1738 off_t offset; 1739 caddr_t addr; 1740 1741 dev = makedev(54,0); /* XXX */ 1742 1743 MALLOC(addr, caddr_t, FDMICROROOTSIZE, M_DEVBUF, M_WAITOK); 1744 *addrp = addr; 1745 1746 if (fdopen(dev, 0, S_IFCHR, NULL)) 1747 panic("fd: mountroot: fdopen"); 1748 1749 offset = 0; 1750 1751 for (;;) { 1752 bp->b_dev = dev; 1753 bp->b_error = 0; 1754 bp->b_resid = 0; 1755 bp->b_proc = NULL; 1756 bp->b_flags = B_BUSY | B_PHYS | B_RAW | B_READ; 1757 bp->b_blkno = btodb(offset); 1758 bp->b_bcount = DEV_BSIZE; 1759 bp->b_data = addr; 1760 fdstrategy(bp); 1761 while ((bp->b_flags & B_DONE) == 0) { 1762 tsleep((caddr_t)bp, PRIBIO + 1, "physio", 0); 1763 } 1764 if (bp->b_error) 1765 panic("fd: mountroot: fdread error %d", bp->b_error); 1766 1767 if (bp->b_resid != 0) 1768 break; 1769 1770 addr += DEV_BSIZE; 1771 offset += DEV_BSIZE; 1772 if (offset + DEV_BSIZE > FDMICROROOTSIZE) 1773 break; 1774 } 1775 (void)fdclose(dev, 0, S_IFCHR, NULL); 1776 *sizep = offset; 1777 fd_do_eject(); 1778 return 0; 1779 } 1780 #endif 1781