fd.c revision 1.17
1 /* $NetBSD: fd.c,v 1.17 2003/08/07 16:26:50 agc Exp $ */ 2 /* $OpenBSD: fd.c,v 1.6 1998/10/03 21:18:57 millert Exp $ */ 3 /* NetBSD: fd.c,v 1.78 1995/07/04 07:23:09 mycroft Exp */ 4 5 /*- 6 * Copyright (c) 1998 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to The NetBSD Foundation 10 * by Charles M. Hannum. 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 NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41 /*- 42 * Copyright (c) 1990 The Regents of the University of California. 43 * All rights reserved. 44 * 45 * This code is derived from software contributed to Berkeley by 46 * Don Ahn. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 * @(#)fd.c 7.4 (Berkeley) 5/25/91 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: fd.c,v 1.17 2003/08/07 16:26:50 agc Exp $"); 77 78 #include <sys/param.h> 79 #include <sys/systm.h> 80 #include <sys/callout.h> 81 #include <sys/kernel.h> 82 #include <sys/conf.h> 83 #include <sys/file.h> 84 #include <sys/ioctl.h> 85 #include <sys/device.h> 86 #include <sys/disklabel.h> 87 #include <sys/disk.h> 88 #include <sys/buf.h> 89 #include <sys/uio.h> 90 #include <sys/syslog.h> 91 #include <sys/queue.h> 92 93 #include <uvm/uvm_extern.h> 94 95 #include <dev/cons.h> 96 97 #include <machine/bus.h> 98 #include <machine/cpu.h> 99 100 #include <arc/jazz/fdreg.h> 101 #include <arc/jazz/fdcvar.h> 102 103 #include "locators.h" 104 105 #define FDUNIT(dev) DISKUNIT(dev) 106 #define FDTYPE(dev) DISKPART(dev) 107 108 /* controller driver configuration */ 109 int fdprint(void *, const char *); 110 111 /* 112 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 113 * we tell them apart. 114 */ 115 struct fd_type { 116 int sectrac; /* sectors per track */ 117 int heads; /* number of heads */ 118 int seccyl; /* sectors per cylinder */ 119 int secsize; /* size code for sectors */ 120 int datalen; /* data len when secsize = 0 */ 121 int steprate; /* step rate and head unload time */ 122 int gap1; /* gap len between sectors */ 123 int gap2; /* formatting gap */ 124 int cyls; /* total num of cylinders */ 125 int size; /* size of disk in sectors */ 126 int step; /* steps per cylinder */ 127 int rate; /* transfer speed code */ 128 const char *name; 129 }; 130 131 /* The order of entries in the following table is important -- BEWARE! */ 132 struct fd_type fd_types[] = { 133 /* 1.44MB diskette */ 134 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, 135 /* 1.2 MB AT-diskettes */ 136 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS, "1.2MB" }, 137 /* 360kB in 1.2MB drive */ 138 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS, "360KB/AT" }, 139 /* 360kB PC diskettes */ 140 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS, "360KB/PC" }, 141 /* 3.5" 720kB diskette */ 142 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS, "720KB" }, 143 /* 720kB in 1.2MB drive */ 144 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS, "720KB/x" }, 145 /* 360kB in 720kB drive */ 146 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS, "360KB/x" }, 147 }; 148 149 /* software state, per disk (with up to 4 disks per ctlr) */ 150 struct fd_softc { 151 struct device sc_dev; 152 struct disk sc_dk; 153 154 const struct fd_type *sc_deftype; /* default type descriptor */ 155 struct fd_type *sc_type; /* current type descriptor */ 156 struct fd_type sc_type_copy; /* copy for fiddling when formatting */ 157 158 struct callout sc_motoron_ch; 159 struct callout sc_motoroff_ch; 160 161 daddr_t sc_blkno; /* starting block number */ 162 int sc_bcount; /* byte count left */ 163 int sc_opts; /* user-set options */ 164 int sc_skip; /* bytes already transferred */ 165 int sc_nblks; /* number of blocks currently transferring */ 166 int sc_nbytes; /* number of bytes currently transferring */ 167 168 int sc_drive; /* physical unit number */ 169 int sc_flags; 170 #define FD_OPEN 0x01 /* it's open */ 171 #define FD_MOTOR 0x02 /* motor should be on */ 172 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 173 int sc_cylin; /* where we think the head is */ 174 175 void *sc_sdhook; /* saved shutdown hook for drive. */ 176 177 TAILQ_ENTRY(fd_softc) sc_drivechain; 178 int sc_ops; /* I/O ops since last switch */ 179 struct bufq_state sc_q; /* pending I/O requests */ 180 int sc_active; /* number of active I/O operations */ 181 }; 182 183 /* floppy driver configuration */ 184 int fdprobe __P((struct device *, struct cfdata *, void *)); 185 void fdattach __P((struct device *, struct device *, void *)); 186 187 extern struct cfdriver fd_cd; 188 189 CFATTACH_DECL(fd, sizeof(struct fd_softc), fdprobe, fdattach, NULL, NULL); 190 191 dev_type_open(fdopen); 192 dev_type_close(fdclose); 193 dev_type_read(fdread); 194 dev_type_write(fdwrite); 195 dev_type_ioctl(fdioctl); 196 dev_type_strategy(fdstrategy); 197 198 const struct bdevsw fd_bdevsw = { 199 fdopen, fdclose, fdstrategy, fdioctl, nodump, nosize, D_DISK 200 }; 201 202 const struct cdevsw fd_cdevsw = { 203 fdopen, fdclose, fdread, fdwrite, fdioctl, 204 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 205 }; 206 207 void fdgetdisklabel(struct fd_softc *); 208 int fd_get_parms(struct fd_softc *); 209 void fdstrategy(struct buf *); 210 void fdstart(struct fd_softc *); 211 212 struct dkdriver fddkdriver = { fdstrategy }; 213 214 #if 0 215 const struct fd_type *fd_nvtotype(char *, int, int); 216 #endif 217 void fd_set_motor(struct fdc_softc *fdc, int reset); 218 void fd_motor_off(void *arg); 219 void fd_motor_on(void *arg); 220 int fdcresult(struct fdc_softc *fdc); 221 void fdcstart(struct fdc_softc *fdc); 222 void fdcstatus(struct device *dv, int n, char *s); 223 void fdctimeout(void *arg); 224 void fdcpseudointr(void *arg); 225 void fdcretry(struct fdc_softc *fdc); 226 void fdfinish(struct fd_softc *fd, struct buf *bp); 227 __inline const struct fd_type *fd_dev_to_type(struct fd_softc *, dev_t); 228 void fd_mountroot_hook(struct device *); 229 230 /* 231 * Arguments passed between fdcattach and fdprobe. 232 */ 233 struct fdc_attach_args { 234 int fa_drive; 235 const struct fd_type *fa_deftype; 236 }; 237 238 /* 239 * Print the location of a disk drive (called just before attaching the 240 * the drive). If `fdc' is not NULL, the drive was found but was not 241 * in the system config file; print the drive name as well. 242 * Return QUIET (config_find ignores this if the device was configured) to 243 * avoid printing `fdN not configured' messages. 244 */ 245 int 246 fdprint(aux, fdc) 247 void *aux; 248 const char *fdc; 249 { 250 struct fdc_attach_args *fa = aux; 251 252 if (!fdc) 253 aprint_normal(" drive %d", fa->fa_drive); 254 return QUIET; 255 } 256 257 void 258 fdcattach(fdc) 259 struct fdc_softc *fdc; 260 { 261 struct fdc_attach_args fa; 262 bus_space_tag_t iot; 263 bus_space_handle_t ioh; 264 int type; 265 266 iot = fdc->sc_iot; 267 ioh = fdc->sc_ioh; 268 callout_init(&fdc->sc_timo_ch); 269 callout_init(&fdc->sc_intr_ch); 270 271 fdc->sc_state = DEVIDLE; 272 TAILQ_INIT(&fdc->sc_drives); 273 274 /* 275 * No way yet to determine default disk types. 276 * we assume 1.44 3.5" type for the moment. 277 */ 278 type = 0; 279 280 /* physical limit: two drives per controller. */ 281 for (fa.fa_drive = 0; fa.fa_drive < 2; fa.fa_drive++) { 282 fa.fa_deftype = &fd_types[type]; 283 (void)config_found(&fdc->sc_dev, (void *)&fa, fdprint); 284 } 285 } 286 287 int 288 fdprobe(parent, match, aux) 289 struct device *parent; 290 struct cfdata *match; 291 void *aux; 292 { 293 struct fdc_softc *fdc = (void *)parent; 294 struct cfdata *cf = match; 295 struct fdc_attach_args *fa = aux; 296 int drive = fa->fa_drive; 297 bus_space_tag_t iot = fdc->sc_iot; 298 bus_space_handle_t ioh = fdc->sc_ioh; 299 int n; 300 301 if (cf->cf_loc[FDCCF_DRIVE] != FDCCF_DRIVE_DEFAULT && 302 cf->cf_loc[FDCCF_DRIVE] != drive) 303 return 0; 304 305 /* select drive and turn on motor */ 306 bus_space_write_1(iot, ioh, FDOUT, drive | FDO_FRST | FDO_MOEN(drive)); 307 /* wait for motor to spin up */ 308 delay(250000); 309 out_fdc(iot, ioh, NE7CMD_RECAL); 310 out_fdc(iot, ioh, drive); 311 /* wait for recalibrate */ 312 delay(2000000); 313 out_fdc(iot, ioh, NE7CMD_SENSEI); 314 n = fdcresult(fdc); 315 #ifdef FD_DEBUG 316 { 317 int i; 318 printf("fdprobe: status"); 319 for (i = 0; i < n; i++) 320 printf(" %x", fdc->sc_status[i]); 321 printf("\n"); 322 } 323 #endif 324 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 325 return 0; 326 /* turn off motor */ 327 bus_space_write_1(iot, ioh, FDOUT, FDO_FRST); 328 329 return 1; 330 } 331 332 /* 333 * Controller is working, and drive responded. Attach it. 334 */ 335 void 336 fdattach(parent, self, aux) 337 struct device *parent, *self; 338 void *aux; 339 { 340 struct fdc_softc *fdc = (void *)parent; 341 struct fd_softc *fd = (void *)self; 342 struct fdc_attach_args *fa = aux; 343 const struct fd_type *type = fa->fa_deftype; 344 int drive = fa->fa_drive; 345 346 callout_init(&fd->sc_motoron_ch); 347 callout_init(&fd->sc_motoroff_ch); 348 349 /* XXX Allow `flags' to override device type? */ 350 351 if (type) 352 printf(": %s, %d cyl, %d head, %d sec\n", type->name, 353 type->cyls, type->heads, type->sectrac); 354 else 355 printf(": density unknown\n"); 356 357 bufq_alloc(&fd->sc_q, BUFQ_DISKSORT|BUFQ_SORT_CYLINDER); 358 fd->sc_cylin = -1; 359 fd->sc_drive = drive; 360 fd->sc_deftype = type; 361 fdc->sc_fd[drive] = fd; 362 363 /* 364 * Initialize and attach the disk structure. 365 */ 366 fd->sc_dk.dk_name = fd->sc_dev.dv_xname; 367 fd->sc_dk.dk_driver = &fddkdriver; 368 disk_attach(&fd->sc_dk); 369 370 /* Establish a mountroot hook. */ 371 mountroothook_establish(fd_mountroot_hook, &fd->sc_dev); 372 373 /* Needed to power off if the motor is on when we halt. */ 374 fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd); 375 } 376 377 #if 0 378 /* 379 * Translate nvram type into internal data structure. Return NULL for 380 * none/unknown/unusable. 381 */ 382 const struct fd_type * 383 fd_nvtotype(fdc, nvraminfo, drive) 384 char *fdc; 385 int nvraminfo, drive; 386 { 387 int type; 388 389 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0; 390 #if 0 391 switch (type) { 392 case NVRAM_DISKETTE_NONE: 393 return NULL; 394 case NVRAM_DISKETTE_12M: 395 return &fd_types[1]; 396 case NVRAM_DISKETTE_TYPE5: 397 case NVRAM_DISKETTE_TYPE6: 398 /* XXX We really ought to handle 2.88MB format. */ 399 case NVRAM_DISKETTE_144M: 400 return &fd_types[0]; 401 case NVRAM_DISKETTE_360K: 402 return &fd_types[3]; 403 case NVRAM_DISKETTE_720K: 404 return &fd_types[4]; 405 default: 406 printf("%s: drive %d: unknown device type 0x%x\n", 407 fdc, drive, type); 408 return NULL; 409 } 410 #else 411 return &fd_types[0]; /* Use only 1.44 for now */ 412 #endif 413 } 414 #endif 415 416 __inline const struct fd_type * 417 fd_dev_to_type(fd, dev) 418 struct fd_softc *fd; 419 dev_t dev; 420 { 421 int type = FDTYPE(dev); 422 423 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 424 return NULL; 425 return type ? &fd_types[type - 1] : fd->sc_deftype; 426 } 427 428 void 429 fdstrategy(bp) 430 struct buf *bp; /* IO operation to perform */ 431 { 432 struct fd_softc *fd = device_lookup(&fd_cd, FDUNIT(bp->b_dev)); 433 int sz; 434 int s; 435 436 /* Valid unit, controller, and request? */ 437 if (bp->b_blkno < 0 || 438 (bp->b_bcount % FDC_BSIZE) != 0) { 439 bp->b_error = EINVAL; 440 goto bad; 441 } 442 443 /* If it's a null transfer, return immediately. */ 444 if (bp->b_bcount == 0) 445 goto done; 446 447 sz = howmany(bp->b_bcount, FDC_BSIZE); 448 449 if (bp->b_blkno + sz > fd->sc_type->size) { 450 sz = fd->sc_type->size - bp->b_blkno; 451 if (sz == 0) { 452 /* If exactly at end of disk, return EOF. */ 453 goto done; 454 } 455 if (sz < 0) { 456 /* If past end of disk, return EINVAL. */ 457 bp->b_error = EINVAL; 458 goto bad; 459 } 460 /* Otherwise, truncate request. */ 461 bp->b_bcount = sz << DEV_BSHIFT; 462 } 463 464 bp->b_rawblkno = bp->b_blkno; 465 bp->b_cylinder = 466 bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 467 468 #ifdef FD_DEBUG 469 printf("fdstrategy: b_blkno %" PRId64 " b_bcount %ld blkno %" PRId64 470 " cylin %ld sz %d\n", 471 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylinder, sz); 472 #endif 473 474 /* Queue transfer on drive, activate drive and controller if idle. */ 475 s = splbio(); 476 BUFQ_PUT(&fd->sc_q, bp); 477 callout_stop(&fd->sc_motoroff_ch); /* a good idea */ 478 if (fd->sc_active == 0) 479 fdstart(fd); 480 #ifdef DIAGNOSTIC 481 else { 482 struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent; 483 if (fdc->sc_state == DEVIDLE) { 484 printf("fdstrategy: controller inactive\n"); 485 fdcstart(fdc); 486 } 487 } 488 #endif 489 splx(s); 490 return; 491 492 bad: 493 bp->b_flags |= B_ERROR; 494 done: 495 /* Toss transfer; we're done early. */ 496 bp->b_resid = bp->b_bcount; 497 biodone(bp); 498 } 499 500 void 501 fdstart(fd) 502 struct fd_softc *fd; 503 { 504 struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent; 505 int active = fdc->sc_drives.tqh_first != 0; 506 507 /* Link into controller queue. */ 508 fd->sc_active = 1; 509 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 510 511 /* If controller not already active, start it. */ 512 if (!active) 513 fdcstart(fdc); 514 } 515 516 void 517 fdfinish(fd, bp) 518 struct fd_softc *fd; 519 struct buf *bp; 520 { 521 struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent; 522 523 /* 524 * Move this drive to the end of the queue to give others a `fair' 525 * chance. We only force a switch if N operations are completed while 526 * another drive is waiting to be serviced, since there is a long motor 527 * startup delay whenever we switch. 528 */ 529 (void)BUFQ_GET(&fd->sc_q); 530 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 531 fd->sc_ops = 0; 532 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 533 if (BUFQ_PEEK(&fd->sc_q) != NULL) 534 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 535 else 536 fd->sc_active = 0; 537 } 538 bp->b_resid = fd->sc_bcount; 539 fd->sc_skip = 0; 540 biodone(bp); 541 /* turn off motor 5s from now */ 542 callout_reset(&fd->sc_motoroff_ch, 5 * hz, fd_motor_off, fd); 543 fdc->sc_state = DEVIDLE; 544 } 545 546 int 547 fdread(dev, uio, flags) 548 dev_t dev; 549 struct uio *uio; 550 int flags; 551 { 552 553 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 554 } 555 556 int 557 fdwrite(dev, uio, flags) 558 dev_t dev; 559 struct uio *uio; 560 int flags; 561 { 562 563 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 564 } 565 566 void 567 fd_set_motor(fdc, reset) 568 struct fdc_softc *fdc; 569 int reset; 570 { 571 struct fd_softc *fd; 572 u_char status; 573 int n; 574 575 if ((fd = fdc->sc_drives.tqh_first) != NULL) 576 status = fd->sc_drive; 577 else 578 status = 0; 579 if (!reset) 580 status |= FDO_FRST | FDO_FDMAEN; 581 for (n = 0; n < 4; n++) 582 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 583 status |= FDO_MOEN(n); 584 bus_space_write_1(fdc->sc_iot, fdc->sc_ioh, FDOUT, status); 585 } 586 587 void 588 fd_motor_off(arg) 589 void *arg; 590 { 591 struct fd_softc *fd = arg; 592 int s; 593 594 s = splbio(); 595 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 596 fd_set_motor((struct fdc_softc *)fd->sc_dev.dv_parent, 0); 597 splx(s); 598 } 599 600 void 601 fd_motor_on(arg) 602 void *arg; 603 { 604 struct fd_softc *fd = arg; 605 struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent; 606 int s; 607 608 s = splbio(); 609 fd->sc_flags &= ~FD_MOTOR_WAIT; 610 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 611 (void) fdcintr(fdc); 612 splx(s); 613 } 614 615 int 616 fdcresult(fdc) 617 struct fdc_softc *fdc; 618 { 619 bus_space_tag_t iot = fdc->sc_iot; 620 bus_space_handle_t ioh = fdc->sc_ioh; 621 u_char i; 622 int j = 100000, 623 n = 0; 624 625 for (; j; j--) { 626 i = bus_space_read_1(iot, ioh, FDSTS) & 627 (NE7_DIO | NE7_RQM | NE7_CB); 628 if (i == NE7_RQM) 629 return n; 630 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 631 if (n >= sizeof(fdc->sc_status)) { 632 log(LOG_ERR, "fdcresult: overrun\n"); 633 return -1; 634 } 635 fdc->sc_status[n++] = 636 bus_space_read_1(iot, ioh, FDDATA); 637 } 638 delay(10); 639 } 640 log(LOG_ERR, "fdcresult: timeout\n"); 641 return -1; 642 } 643 644 int 645 out_fdc(iot, ioh, x) 646 bus_space_tag_t iot; 647 bus_space_handle_t ioh; 648 u_char x; 649 { 650 int i = 100000; 651 652 while ((bus_space_read_1(iot, ioh, FDSTS) & NE7_DIO) && i-- > 0); 653 if (i <= 0) 654 return -1; 655 while ((bus_space_read_1(iot, ioh, FDSTS) & NE7_RQM) == 0 && i-- > 0); 656 if (i <= 0) 657 return -1; 658 bus_space_write_1(iot, ioh, FDDATA, x); 659 return 0; 660 } 661 662 int 663 fdopen(dev, flags, mode, p) 664 dev_t dev; 665 int flags; 666 int mode; 667 struct proc *p; 668 { 669 struct fd_softc *fd; 670 const struct fd_type *type; 671 672 fd = device_lookup(&fd_cd, FDUNIT(dev)); 673 if (fd == NULL) 674 return ENXIO; 675 676 type = fd_dev_to_type(fd, dev); 677 if (type == NULL) 678 return ENXIO; 679 680 if ((fd->sc_flags & FD_OPEN) != 0 && 681 memcmp(fd->sc_type, type, sizeof(*type))) 682 return EBUSY; 683 684 fd->sc_type_copy = *type; 685 fd->sc_type = &fd->sc_type_copy; 686 fd->sc_cylin = -1; 687 fd->sc_flags |= FD_OPEN; 688 689 return 0; 690 } 691 692 int 693 fdclose(dev, flags, mode, p) 694 dev_t dev; 695 int flags; 696 int mode; 697 struct proc *p; 698 { 699 struct fd_softc *fd = device_lookup(&fd_cd, FDUNIT(dev)); 700 701 fd->sc_flags &= ~FD_OPEN; 702 return 0; 703 } 704 705 void 706 fdcstart(fdc) 707 struct fdc_softc *fdc; 708 { 709 710 #ifdef DIAGNOSTIC 711 /* only got here if controller's drive queue was inactive; should 712 be in idle state */ 713 if (fdc->sc_state != DEVIDLE) { 714 printf("fdcstart: not idle\n"); 715 return; 716 } 717 #endif 718 (void) fdcintr(fdc); 719 } 720 721 void 722 fdcstatus(dv, n, s) 723 struct device *dv; 724 int n; 725 char *s; 726 { 727 struct fdc_softc *fdc = (void *)dv->dv_parent; 728 char bits[64]; 729 730 if (n == 0) { 731 out_fdc(fdc->sc_iot, fdc->sc_ioh, NE7CMD_SENSEI); 732 (void) fdcresult(fdc); 733 n = 2; 734 } 735 736 printf("%s: %s", dv->dv_xname, s); 737 738 switch (n) { 739 case 0: 740 printf("\n"); 741 break; 742 case 2: 743 printf(" (st0 %s cyl %d)\n", 744 bitmask_snprintf(fdc->sc_status[0], NE7_ST0BITS, 745 bits, sizeof(bits)), fdc->sc_status[1]); 746 break; 747 case 7: 748 printf(" (st0 %s", bitmask_snprintf(fdc->sc_status[0], 749 NE7_ST0BITS, bits, sizeof(bits))); 750 printf(" st1 %s", bitmask_snprintf(fdc->sc_status[1], 751 NE7_ST1BITS, bits, sizeof(bits))); 752 printf(" st2 %s", bitmask_snprintf(fdc->sc_status[2], 753 NE7_ST2BITS, bits, sizeof(bits))); 754 printf(" cyl %d head %d sec %d)\n", 755 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 756 break; 757 #ifdef DIAGNOSTIC 758 default: 759 printf("\nfdcstatus: weird size"); 760 break; 761 #endif 762 } 763 } 764 765 void 766 fdctimeout(arg) 767 void *arg; 768 { 769 struct fdc_softc *fdc = arg; 770 struct fd_softc *fd = fdc->sc_drives.tqh_first; 771 int s; 772 773 s = splbio(); 774 #ifdef DEBUG 775 log(LOG_ERR, "fdctimeout: state %d\n", fdc->sc_state); 776 #endif 777 fdcstatus(&fd->sc_dev, 0, "timeout"); 778 779 if (BUFQ_PEEK(&fd->sc_q) != NULL) 780 fdc->sc_state++; 781 else 782 fdc->sc_state = DEVIDLE; 783 784 (void) fdcintr(fdc); 785 splx(s); 786 } 787 788 void 789 fdcpseudointr(arg) 790 void *arg; 791 { 792 int s; 793 794 /* Just ensure it has the right spl. */ 795 s = splbio(); 796 (void) fdcintr(arg); 797 splx(s); 798 } 799 800 int 801 fdcintr(arg) 802 void *arg; 803 { 804 struct fdc_softc *fdc = arg; 805 #define st0 fdc->sc_status[0] 806 #define cyl fdc->sc_status[1] 807 struct fd_softc *fd; 808 struct buf *bp; 809 bus_space_tag_t iot = fdc->sc_iot; 810 bus_space_handle_t ioh = fdc->sc_ioh; 811 int read, head, sec, i, nblks; 812 struct fd_type *type; 813 814 loop: 815 /* Is there a drive for the controller to do a transfer with? */ 816 fd = fdc->sc_drives.tqh_first; 817 if (fd == NULL) { 818 fdc->sc_state = DEVIDLE; 819 return 1; 820 } 821 822 /* Is there a transfer to this drive? If not, deactivate drive. */ 823 bp = BUFQ_PEEK(&fd->sc_q); 824 if (bp == NULL) { 825 fd->sc_ops = 0; 826 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 827 fd->sc_active = 0; 828 goto loop; 829 } 830 831 switch (fdc->sc_state) { 832 case DEVIDLE: 833 fdc->sc_errors = 0; 834 fd->sc_skip = 0; 835 fd->sc_bcount = bp->b_bcount; 836 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 837 callout_stop(&fd->sc_motoroff_ch); 838 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 839 fdc->sc_state = MOTORWAIT; 840 return 1; 841 } 842 if ((fd->sc_flags & FD_MOTOR) == 0) { 843 /* Turn on the motor, being careful about pairing. */ 844 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 845 if (ofd && ofd->sc_flags & FD_MOTOR) { 846 callout_stop(&ofd->sc_motoroff_ch); 847 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 848 } 849 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 850 fd_set_motor(fdc, 0); 851 fdc->sc_state = MOTORWAIT; 852 /* Allow .25s for motor to stabilize. */ 853 callout_reset(&fd->sc_motoron_ch, hz / 4, 854 fd_motor_on, fd); 855 return 1; 856 } 857 /* Make sure the right drive is selected. */ 858 fd_set_motor(fdc, 0); 859 860 /* fall through */ 861 case DOSEEK: 862 doseek: 863 if (fd->sc_cylin == bp->b_cylinder) 864 goto doio; 865 866 out_fdc(iot, ioh, NE7CMD_SPECIFY);/* specify command */ 867 out_fdc(iot, ioh, fd->sc_type->steprate); 868 out_fdc(iot, ioh, 6); /* XXX head load time == 6ms */ 869 870 out_fdc(iot, ioh, NE7CMD_SEEK); /* seek function */ 871 out_fdc(iot, ioh, fd->sc_drive); /* drive number */ 872 out_fdc(iot, ioh, bp->b_cylinder * fd->sc_type->step); 873 874 fd->sc_cylin = -1; 875 fdc->sc_state = SEEKWAIT; 876 877 fd->sc_dk.dk_seek++; 878 disk_busy(&fd->sc_dk); 879 880 callout_reset(&fdc->sc_timo_ch, 4 * hz, fdctimeout, fdc); 881 return 1; 882 883 case DOIO: 884 doio: 885 type = fd->sc_type; 886 sec = fd->sc_blkno % type->seccyl; 887 nblks = type->seccyl - sec; 888 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 889 nblks = min(nblks, fdc->sc_maxiosize / FDC_BSIZE); 890 fd->sc_nblks = nblks; 891 fd->sc_nbytes = nblks * FDC_BSIZE; 892 head = sec / type->sectrac; 893 sec -= head * type->sectrac; 894 #ifdef DIAGNOSTIC 895 { 896 int block; 897 block = (fd->sc_cylin * type->heads + head) * 898 type->sectrac + sec; 899 if (block != fd->sc_blkno) { 900 printf("fdcintr: block %d != blkno %" PRId64 901 "\n", block, fd->sc_blkno); 902 #ifdef DDB 903 Debugger(); 904 #endif 905 } 906 } 907 #endif 908 read = (bp->b_flags & B_READ) != 0; 909 FDCDMA_START(fdc, bp->b_data + fd->sc_skip, 910 fd->sc_nbytes, read); 911 bus_space_write_1(iot, ioh, FDCTL, type->rate); 912 #ifdef FD_DEBUG 913 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 914 read ? "read" : "write", fd->sc_drive, fd->sc_cylin, head, 915 sec, nblks); 916 #endif 917 if (read) 918 out_fdc(iot, ioh, NE7CMD_READ); /* READ */ 919 else 920 out_fdc(iot, ioh, NE7CMD_WRITE);/* WRITE */ 921 out_fdc(iot, ioh, (head << 2) | fd->sc_drive); 922 out_fdc(iot, ioh, fd->sc_cylin); /* track */ 923 out_fdc(iot, ioh, head); 924 out_fdc(iot, ioh, sec + 1); /* sector + 1 */ 925 out_fdc(iot, ioh, type->secsize); /* sector size */ 926 out_fdc(iot, ioh, type->sectrac); /* sectors/track */ 927 out_fdc(iot, ioh, type->gap1); /* gap1 size */ 928 out_fdc(iot, ioh, type->datalen); /* data length */ 929 fdc->sc_state = IOCOMPLETE; 930 931 disk_busy(&fd->sc_dk); 932 933 /* allow 2 seconds for operation */ 934 callout_reset(&fdc->sc_timo_ch, 2 * hz, fdctimeout, fdc); 935 return 1; /* will return later */ 936 937 case SEEKWAIT: 938 callout_stop(&fdc->sc_timo_ch); 939 fdc->sc_state = SEEKCOMPLETE; 940 /* allow 1/50 second for heads to settle */ 941 callout_reset(&fdc->sc_intr_ch, hz / 50, fdcpseudointr, fdc); 942 return 1; 943 944 case SEEKCOMPLETE: 945 disk_unbusy(&fd->sc_dk, 0, 0); 946 947 /* Make sure seek really happened. */ 948 out_fdc(iot, ioh, NE7CMD_SENSEI); 949 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || 950 cyl != bp->b_cylinder * fd->sc_type->step) { 951 #ifdef FD_DEBUG 952 fdcstatus(&fd->sc_dev, 2, "seek failed"); 953 #endif 954 fdcretry(fdc); 955 goto loop; 956 } 957 fd->sc_cylin = bp->b_cylinder; 958 goto doio; 959 960 case IOTIMEDOUT: 961 FDCDMA_ABORT(fdc); 962 963 case SEEKTIMEDOUT: 964 case RECALTIMEDOUT: 965 case RESETTIMEDOUT: 966 fdcretry(fdc); 967 goto loop; 968 969 case IOCOMPLETE: /* IO DONE, post-analyze */ 970 callout_stop(&fdc->sc_timo_ch); 971 972 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid), 973 (bp->b_flags & B_READ)); 974 975 i = fdcresult(fdc); 976 if (i != 7 || (st0 & 0xf8) != 0) { 977 FDCDMA_ABORT(fdc); 978 #ifdef FD_DEBUG 979 fdcstatus(&fd->sc_dev, 7, bp->b_flags & B_READ ? 980 "read failed" : "write failed"); 981 printf("blkno %" PRId64 " nblks %d\n", 982 fd->sc_blkno, fd->sc_nblks); 983 #endif 984 fdcretry(fdc); 985 goto loop; 986 } 987 FDCDMA_DONE(fdc); 988 if (fdc->sc_errors) { 989 diskerr(bp, "fd", "soft error (corrected)", LOG_PRINTF, 990 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 991 printf("\n"); 992 fdc->sc_errors = 0; 993 } 994 fd->sc_blkno += fd->sc_nblks; 995 fd->sc_skip += fd->sc_nbytes; 996 fd->sc_bcount -= fd->sc_nbytes; 997 if (fd->sc_bcount > 0) { 998 bp->b_cylinder = fd->sc_blkno / fd->sc_type->seccyl; 999 goto doseek; 1000 } 1001 fdfinish(fd, bp); 1002 goto loop; 1003 1004 case DORESET: 1005 /* try a reset, keep motor on */ 1006 fd_set_motor(fdc, 1); 1007 delay(100); 1008 fd_set_motor(fdc, 0); 1009 fdc->sc_state = RESETCOMPLETE; 1010 callout_reset(&fdc->sc_timo_ch, hz / 2, fdctimeout, fdc); 1011 return 1; /* will return later */ 1012 1013 case RESETCOMPLETE: 1014 callout_stop(&fdc->sc_timo_ch); 1015 /* clear the controller output buffer */ 1016 for (i = 0; i < 4; i++) { 1017 out_fdc(iot, ioh, NE7CMD_SENSEI); 1018 (void) fdcresult(fdc); 1019 } 1020 1021 /* fall through */ 1022 case DORECAL: 1023 out_fdc(iot, ioh, NE7CMD_RECAL); /* recalibrate function */ 1024 out_fdc(iot, ioh, fd->sc_drive); 1025 fdc->sc_state = RECALWAIT; 1026 callout_reset(&fdc->sc_timo_ch, 5 * hz, fdctimeout, fdc); 1027 return 1; /* will return later */ 1028 1029 case RECALWAIT: 1030 callout_stop(&fdc->sc_timo_ch); 1031 fdc->sc_state = RECALCOMPLETE; 1032 /* allow 1/30 second for heads to settle */ 1033 callout_reset(&fdc->sc_intr_ch, hz / 30, fdcpseudointr, fdc); 1034 return 1; /* will return later */ 1035 1036 case RECALCOMPLETE: 1037 out_fdc(iot, ioh, NE7CMD_SENSEI); 1038 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1039 #ifdef FD_DEBUG 1040 fdcstatus(&fd->sc_dev, 2, "recalibrate failed"); 1041 #endif 1042 fdcretry(fdc); 1043 goto loop; 1044 } 1045 fd->sc_cylin = 0; 1046 goto doseek; 1047 1048 case MOTORWAIT: 1049 if (fd->sc_flags & FD_MOTOR_WAIT) 1050 return 1; /* time's not up yet */ 1051 goto doseek; 1052 1053 default: 1054 fdcstatus(&fd->sc_dev, 0, "stray interrupt"); 1055 return 1; 1056 } 1057 #ifdef DIAGNOSTIC 1058 panic("fdcintr: impossible"); 1059 #endif 1060 #undef st0 1061 #undef cyl 1062 } 1063 1064 void 1065 fdcretry(fdc) 1066 struct fdc_softc *fdc; 1067 { 1068 struct fd_softc *fd; 1069 struct buf *bp; 1070 char bits[64]; 1071 1072 fd = fdc->sc_drives.tqh_first; 1073 bp = BUFQ_PEEK(&fd->sc_q); 1074 1075 switch (fdc->sc_errors) { 1076 case 0: 1077 /* try again */ 1078 fdc->sc_state = DOSEEK; 1079 break; 1080 1081 case 1: case 2: case 3: 1082 /* didn't work; try recalibrating */ 1083 fdc->sc_state = DORECAL; 1084 break; 1085 1086 case 4: 1087 /* still no go; reset the bastard */ 1088 fdc->sc_state = DORESET; 1089 break; 1090 1091 default: 1092 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1093 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1094 1095 printf(" (st0 %s", bitmask_snprintf(fdc->sc_status[0], 1096 NE7_ST0BITS, bits, sizeof(bits))); 1097 printf(" st1 %s", bitmask_snprintf(fdc->sc_status[1], 1098 NE7_ST1BITS, bits, sizeof(bits))); 1099 printf(" st2 %s", bitmask_snprintf(fdc->sc_status[2], 1100 NE7_ST2BITS, bits, sizeof(bits))); 1101 printf(" cyl %d head %d sec %d)\n", 1102 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 1103 1104 bp->b_flags |= B_ERROR; 1105 bp->b_error = EIO; 1106 fdfinish(fd, bp); 1107 } 1108 fdc->sc_errors++; 1109 } 1110 1111 int 1112 fdioctl(dev, cmd, addr, flag, p) 1113 dev_t dev; 1114 u_long cmd; 1115 caddr_t addr; 1116 int flag; 1117 struct proc *p; 1118 { 1119 struct fd_softc *fd = device_lookup(&fd_cd, FDUNIT(dev)); 1120 struct disklabel buffer; 1121 int error; 1122 1123 switch (cmd) { 1124 case DIOCGDINFO: 1125 memset(&buffer, 0, sizeof(buffer)); 1126 1127 buffer.d_secpercyl = fd->sc_type->seccyl; 1128 buffer.d_type = DTYPE_FLOPPY; 1129 buffer.d_secsize = FDC_BSIZE; 1130 1131 if (readdisklabel(dev, fdstrategy, &buffer, NULL) != NULL) 1132 return EINVAL; 1133 1134 *(struct disklabel *)addr = buffer; 1135 return 0; 1136 1137 case DIOCWLABEL: 1138 if ((flag & FWRITE) == 0) 1139 return EBADF; 1140 /* XXX do something */ 1141 return 0; 1142 1143 case DIOCWDINFO: 1144 if ((flag & FWRITE) == 0) 1145 return EBADF; 1146 1147 error = setdisklabel(&buffer, (struct disklabel *)addr, 1148 0, NULL); 1149 if (error) 1150 return error; 1151 1152 error = writedisklabel(dev, fdstrategy, &buffer, NULL); 1153 return error; 1154 1155 default: 1156 return ENOTTY; 1157 } 1158 1159 #ifdef DIAGNOSTIC 1160 panic("fdioctl: impossible"); 1161 #endif 1162 } 1163 1164 /* 1165 * Mountroot hook: prompt the user to enter the root file system floppy. 1166 */ 1167 void 1168 fd_mountroot_hook(dev) 1169 struct device *dev; 1170 { 1171 int c; 1172 1173 printf("Insert filesystem floppy and press return."); 1174 cnpollc(1); 1175 for (;;) { 1176 c = cngetc(); 1177 if ((c == '\r') || (c == '\n')) { 1178 printf("\n"); 1179 break; 1180 } 1181 } 1182 cnpollc(0); 1183 } 1184
Indexes created Thu Oct 02 07:10:07 GMT 2025