fd.c revision 1.45
1 /* $NetBSD: fd.c,v 1.45 2014/07/25 08:10:31 dholland 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 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /*- 35 * Copyright (c) 1990 The Regents of the University of California. 36 * All rights reserved. 37 * 38 * This code is derived from software contributed to Berkeley by 39 * Don Ahn. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)fd.c 7.4 (Berkeley) 5/25/91 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: fd.c,v 1.45 2014/07/25 08:10:31 dholland Exp $"); 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/callout.h> 74 #include <sys/kernel.h> 75 #include <sys/conf.h> 76 #include <sys/file.h> 77 #include <sys/ioctl.h> 78 #include <sys/device.h> 79 #include <sys/disklabel.h> 80 #include <sys/disk.h> 81 #include <sys/buf.h> 82 #include <sys/bufq.h> 83 #include <sys/uio.h> 84 #include <sys/syslog.h> 85 #include <sys/queue.h> 86 87 #include <uvm/uvm_extern.h> 88 89 #include <dev/cons.h> 90 91 #include <sys/bus.h> 92 #include <machine/cpu.h> 93 94 #include <arc/jazz/fdreg.h> 95 #include <arc/jazz/fdcvar.h> 96 97 #include "ioconf.h" 98 #include "locators.h" 99 100 #define FDUNIT(dev) DISKUNIT(dev) 101 #define FDTYPE(dev) DISKPART(dev) 102 103 /* controller driver configuration */ 104 static int fdprint(void *, const char *); 105 106 /* 107 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 108 * we tell them apart. 109 */ 110 struct fd_type { 111 int sectrac; /* sectors per track */ 112 int heads; /* number of heads */ 113 int seccyl; /* sectors per cylinder */ 114 int secsize; /* size code for sectors */ 115 int datalen; /* data len when secsize = 0 */ 116 int steprate; /* step rate and head unload time */ 117 int gap1; /* gap len between sectors */ 118 int gap2; /* formatting gap */ 119 int cyls; /* total num of cylinders */ 120 int size; /* size of disk in sectors */ 121 int step; /* steps per cylinder */ 122 int rate; /* transfer speed code */ 123 const char *name; 124 }; 125 126 /* The order of entries in the following table is important -- BEWARE! */ 127 const static struct fd_type fd_types[] = { 128 /* 1.44MB diskette */ 129 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, 130 /* 1.2 MB AT-diskettes */ 131 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS, "1.2MB" }, 132 /* 360kB in 1.2MB drive */ 133 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS, "360KB/AT" }, 134 /* 360kB PC diskettes */ 135 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS, "360KB/PC" }, 136 /* 3.5" 720kB diskette */ 137 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS, "720KB" }, 138 /* 720kB in 1.2MB drive */ 139 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS, "720KB/x" }, 140 /* 360kB in 720kB drive */ 141 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS, "360KB/x" }, 142 }; 143 144 /* software state, per disk (with up to 4 disks per ctlr) */ 145 struct fd_softc { 146 device_t sc_dev; 147 struct disk sc_dk; 148 149 const struct fd_type *sc_deftype; /* default type descriptor */ 150 struct fd_type *sc_type; /* current type descriptor */ 151 struct fd_type sc_type_copy; /* copy for fiddling when formatting */ 152 153 struct callout sc_motoron_ch; 154 struct callout sc_motoroff_ch; 155 156 daddr_t sc_blkno; /* starting block number */ 157 int sc_bcount; /* byte count left */ 158 int sc_opts; /* user-set options */ 159 int sc_skip; /* bytes already transferred */ 160 int sc_nblks; /* number of blocks currently transferring */ 161 int sc_nbytes; /* number of bytes currently transferring */ 162 163 int sc_drive; /* physical unit number */ 164 int sc_flags; 165 #define FD_OPEN 0x01 /* it's open */ 166 #define FD_MOTOR 0x02 /* motor should be on */ 167 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 168 int sc_cylin; /* where we think the head is */ 169 170 TAILQ_ENTRY(fd_softc) sc_drivechain; 171 int sc_ops; /* I/O ops since last switch */ 172 struct bufq_state *sc_q;/* pending I/O requests */ 173 int sc_active; /* number of active I/O operations */ 174 }; 175 176 /* floppy driver configuration */ 177 static int fdprobe(device_t, cfdata_t, void *); 178 static void fdattach(device_t, device_t, void *); 179 180 CFATTACH_DECL_NEW(fd, sizeof(struct fd_softc), fdprobe, fdattach, NULL, NULL); 181 182 dev_type_open(fdopen); 183 dev_type_close(fdclose); 184 dev_type_read(fdread); 185 dev_type_write(fdwrite); 186 dev_type_ioctl(fdioctl); 187 dev_type_strategy(fdstrategy); 188 189 const struct bdevsw fd_bdevsw = { 190 .d_open = fdopen, 191 .d_close = fdclose, 192 .d_strategy = fdstrategy, 193 .d_ioctl = fdioctl, 194 .d_dump = nodump, 195 .d_psize = nosize, 196 .d_discard = nodiscard, 197 .d_flag = D_DISK 198 }; 199 200 const struct cdevsw fd_cdevsw = { 201 .d_open = fdopen, 202 .d_close = fdclose, 203 .d_read = fdread, 204 .d_write = fdwrite, 205 .d_ioctl = fdioctl, 206 .d_stop = nostop, 207 .d_tty = notty, 208 .d_poll = nopoll, 209 .d_mmap = nommap, 210 .d_kqfilter = nokqfilter, 211 .d_discard = nodiscard, 212 .d_flag = D_DISK 213 }; 214 215 static void fdstart(struct fd_softc *); 216 217 struct dkdriver fddkdriver = { fdstrategy }; 218 219 static bool fd_shutdown(device_t, int); 220 #if 0 221 static const struct fd_type *fd_nvtotype(char *, int, int); 222 #endif 223 static void fd_set_motor(struct fdc_softc *, int); 224 static void fd_motor_off(void *); 225 static void fd_motor_on(void *); 226 static int fdcresult(struct fdc_softc *); 227 static void fdcstart(struct fdc_softc *); 228 static void fdcstatus(device_t, int, const char *); 229 static void fdctimeout(void *); 230 static void fdcpseudointr(void *); 231 static void fdcretry(struct fdc_softc *); 232 static void fdfinish(struct fd_softc *, struct buf *); 233 static inline const struct fd_type *fd_dev_to_type(struct fd_softc *, dev_t); 234 static void fd_mountroot_hook(device_t); 235 236 /* 237 * Arguments passed between fdcattach and fdprobe. 238 */ 239 struct fdc_attach_args { 240 int fa_drive; 241 const struct fd_type *fa_deftype; 242 }; 243 244 /* 245 * Print the location of a disk drive (called just before attaching the 246 * the drive). If `fdc' is not NULL, the drive was found but was not 247 * in the system config file; print the drive name as well. 248 * Return QUIET (config_find ignores this if the device was configured) to 249 * avoid printing `fdN not configured' messages. 250 */ 251 static int 252 fdprint(void *aux, const char *fdc) 253 { 254 struct fdc_attach_args *fa = aux; 255 256 if (fdc == NULL) 257 aprint_normal(" drive %d", fa->fa_drive); 258 return QUIET; 259 } 260 261 void 262 fdcattach(struct fdc_softc *fdc) 263 { 264 struct fdc_attach_args fa; 265 int type; 266 267 callout_init(&fdc->sc_timo_ch, 0); 268 callout_init(&fdc->sc_intr_ch, 0); 269 270 fdc->sc_state = DEVIDLE; 271 TAILQ_INIT(&fdc->sc_drives); 272 273 /* 274 * No way yet to determine default disk types. 275 * we assume 1.44 3.5" type for the moment. 276 */ 277 type = 0; 278 279 /* physical limit: two drives per controller. */ 280 for (fa.fa_drive = 0; fa.fa_drive < 2; fa.fa_drive++) { 281 fa.fa_deftype = &fd_types[type]; 282 (void)config_found(fdc->sc_dev, (void *)&fa, fdprint); 283 } 284 } 285 286 static int 287 fdprobe(device_t parent, cfdata_t cf , void *aux) 288 { 289 struct fdc_softc *fdc = device_private(parent); 290 struct fdc_attach_args *fa = aux; 291 int drive = fa->fa_drive; 292 bus_space_tag_t iot = fdc->sc_iot; 293 bus_space_handle_t ioh = fdc->sc_ioh; 294 int n; 295 296 if (cf->cf_loc[FDCCF_DRIVE] != FDCCF_DRIVE_DEFAULT && 297 cf->cf_loc[FDCCF_DRIVE] != drive) 298 return 0; 299 300 /* select drive and turn on motor */ 301 bus_space_write_1(iot, ioh, FDOUT, drive | FDO_FRST | FDO_MOEN(drive)); 302 /* wait for motor to spin up */ 303 delay(250000); 304 out_fdc(iot, ioh, NE7CMD_RECAL); 305 out_fdc(iot, ioh, drive); 306 /* wait for recalibrate */ 307 delay(2000000); 308 out_fdc(iot, ioh, NE7CMD_SENSEI); 309 n = fdcresult(fdc); 310 #ifdef FD_DEBUG 311 { 312 int i; 313 aprint_debug("%s: status", __func__); 314 for (i = 0; i < n; i++) 315 aprint_debug(" %x", fdc->sc_status[i]); 316 aprint_debug("\n"); 317 } 318 #endif 319 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 320 return 0; 321 /* turn off motor */ 322 bus_space_write_1(iot, ioh, FDOUT, FDO_FRST); 323 324 return 1; 325 } 326 327 /* 328 * Controller is working, and drive responded. Attach it. 329 */ 330 void 331 fdattach(device_t parent, device_t self, void *aux) 332 { 333 struct fdc_softc *fdc = device_private(parent); 334 struct fd_softc *fd = device_private(self); 335 struct fdc_attach_args *fa = aux; 336 const struct fd_type *type = fa->fa_deftype; 337 int drive = fa->fa_drive; 338 339 fd->sc_dev = self; 340 341 callout_init(&fd->sc_motoron_ch, 0); 342 callout_init(&fd->sc_motoroff_ch, 0); 343 344 /* XXX Allow `flags' to override device type? */ 345 346 if (type) 347 printf(": %s, %d cyl, %d head, %d sec\n", type->name, 348 type->cyls, type->heads, type->sectrac); 349 else 350 printf(": density unknown\n"); 351 352 bufq_alloc(&fd->sc_q, "disksort", BUFQ_SORT_CYLINDER); 353 fd->sc_cylin = -1; 354 fd->sc_drive = drive; 355 fd->sc_deftype = type; 356 fdc->sc_fd[drive] = fd; 357 358 /* 359 * Initialize and attach the disk structure. 360 */ 361 disk_init(&fd->sc_dk, device_xname(fd->sc_dev), &fddkdriver); 362 disk_attach(&fd->sc_dk); 363 364 /* Establish a mountroot hook. */ 365 mountroothook_establish(fd_mountroot_hook, fd->sc_dev); 366 367 /* Needed to power off if the motor is on when we halt. */ 368 if (!pmf_device_register1(self, NULL, NULL, fd_shutdown)) 369 aprint_error_dev(self, "couldn't establish power handler\n"); 370 } 371 372 bool 373 fd_shutdown(device_t self, int howto) 374 { 375 struct fd_softc *fd; 376 377 fd = device_private(self); 378 fd_motor_off(fd); 379 380 return true; 381 } 382 383 #if 0 384 /* 385 * Translate nvram type into internal data structure. Return NULL for 386 * none/unknown/unusable. 387 */ 388 static const struct fd_type * 389 fd_nvtotype(char *fdc, int nvraminfo, int drive) 390 { 391 int type; 392 393 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0; 394 #if 0 395 switch (type) { 396 case NVRAM_DISKETTE_NONE: 397 return NULL; 398 case NVRAM_DISKETTE_12M: 399 return &fd_types[1]; 400 case NVRAM_DISKETTE_TYPE5: 401 case NVRAM_DISKETTE_TYPE6: 402 /* XXX We really ought to handle 2.88MB format. */ 403 case NVRAM_DISKETTE_144M: 404 return &fd_types[0]; 405 case NVRAM_DISKETTE_360K: 406 return &fd_types[3]; 407 case NVRAM_DISKETTE_720K: 408 return &fd_types[4]; 409 default: 410 printf("%s: drive %d: unknown device type 0x%x\n", 411 fdc, drive, type); 412 return NULL; 413 } 414 #else 415 return &fd_types[0]; /* Use only 1.44 for now */ 416 #endif 417 } 418 #endif 419 420 static inline const struct fd_type * 421 fd_dev_to_type(struct fd_softc *fd, dev_t dev) 422 { 423 int type = FDTYPE(dev); 424 425 if (type > __arraycount(fd_types)) 426 return NULL; 427 return type ? &fd_types[type - 1] : fd->sc_deftype; 428 } 429 430 void 431 fdstrategy(struct buf *bp) 432 { 433 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(bp->b_dev)); 434 int sz; 435 int s; 436 437 /* Valid unit, controller, and request? */ 438 if (bp->b_blkno < 0 || 439 (bp->b_bcount % FDC_BSIZE) != 0) { 440 bp->b_error = EINVAL; 441 goto done; 442 } 443 444 /* If it's a null transfer, return immediately. */ 445 if (bp->b_bcount == 0) 446 goto done; 447 448 sz = howmany(bp->b_bcount, FDC_BSIZE); 449 450 if (bp->b_blkno + sz > fd->sc_type->size) { 451 sz = fd->sc_type->size - bp->b_blkno; 452 if (sz == 0) { 453 /* If exactly at end of disk, return EOF. */ 454 goto done; 455 } 456 if (sz < 0) { 457 /* If past end of disk, return EINVAL. */ 458 bp->b_error = EINVAL; 459 goto done; 460 } 461 /* Otherwise, truncate request. */ 462 bp->b_bcount = sz << DEV_BSHIFT; 463 } 464 465 bp->b_rawblkno = bp->b_blkno; 466 bp->b_cylinder = 467 bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 468 469 #ifdef FD_DEBUG 470 printf("%s: b_blkno %" PRId64 " b_bcount %ld blkno %" PRId64 471 " cylin %ld sz %d\n", __func__, 472 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylinder, sz); 473 #endif 474 475 /* Queue transfer on drive, activate drive and controller if idle. */ 476 s = splbio(); 477 bufq_put(fd->sc_q, bp); 478 callout_stop(&fd->sc_motoroff_ch); /* a good idea */ 479 if (fd->sc_active == 0) 480 fdstart(fd); 481 #ifdef DIAGNOSTIC 482 else { 483 struct fdc_softc *fdc = 484 device_private(device_parent(fd->sc_dev)); 485 if (fdc->sc_state == DEVIDLE) { 486 printf("%s: controller inactive\n", __func__); 487 fdcstart(fdc); 488 } 489 } 490 #endif 491 splx(s); 492 return; 493 494 done: 495 /* Toss transfer; we're done early. */ 496 bp->b_resid = bp->b_bcount; 497 biodone(bp); 498 } 499 500 void 501 fdstart(struct fd_softc *fd) 502 { 503 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 504 int active = TAILQ_FIRST(&fdc->sc_drives) != 0; 505 506 /* Link into controller queue. */ 507 fd->sc_active = 1; 508 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 509 510 /* If controller not already active, start it. */ 511 if (!active) 512 fdcstart(fdc); 513 } 514 515 void 516 fdfinish(struct fd_softc *fd, struct buf *bp) 517 { 518 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 519 520 /* 521 * Move this drive to the end of the queue to give others a `fair' 522 * chance. We only force a switch if N operations are completed while 523 * another drive is waiting to be serviced, since there is a long motor 524 * startup delay whenever we switch. 525 */ 526 (void)bufq_get(fd->sc_q); 527 if (TAILQ_NEXT(fd, sc_drivechain) && ++fd->sc_ops >= 8) { 528 fd->sc_ops = 0; 529 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 530 if (bufq_peek(fd->sc_q) != NULL) 531 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 532 else 533 fd->sc_active = 0; 534 } 535 bp->b_resid = fd->sc_bcount; 536 fd->sc_skip = 0; 537 biodone(bp); 538 /* turn off motor 5s from now */ 539 callout_reset(&fd->sc_motoroff_ch, 5 * hz, fd_motor_off, fd); 540 fdc->sc_state = DEVIDLE; 541 } 542 543 int 544 fdread(dev_t dev, struct uio *uio, int flags) 545 { 546 547 return physio(fdstrategy, NULL, dev, B_READ, minphys, uio); 548 } 549 550 int 551 fdwrite(dev_t dev, struct uio *uio, int flags) 552 { 553 554 return physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio); 555 } 556 557 void 558 fd_set_motor(struct fdc_softc *fdc, int reset) 559 { 560 struct fd_softc *fd; 561 u_char status; 562 int n; 563 564 if ((fd = TAILQ_FIRST(&fdc->sc_drives)) != NULL) 565 status = fd->sc_drive; 566 else 567 status = 0; 568 if (!reset) 569 status |= FDO_FRST | FDO_FDMAEN; 570 for (n = 0; n < 4; n++) 571 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 572 status |= FDO_MOEN(n); 573 bus_space_write_1(fdc->sc_iot, fdc->sc_ioh, FDOUT, status); 574 } 575 576 void 577 fd_motor_off(void *arg) 578 { 579 struct fd_softc *fd = arg; 580 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 581 int s; 582 583 s = splbio(); 584 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 585 fd_set_motor(fdc, 0); 586 splx(s); 587 } 588 589 void 590 fd_motor_on(void *arg) 591 { 592 struct fd_softc *fd = arg; 593 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 594 int s; 595 596 s = splbio(); 597 fd->sc_flags &= ~FD_MOTOR_WAIT; 598 if ((TAILQ_FIRST(&fdc->sc_drives) == fd) && 599 (fdc->sc_state == MOTORWAIT)) 600 (void)fdcintr(fdc); 601 splx(s); 602 } 603 604 int 605 fdcresult(struct fdc_softc *fdc) 606 { 607 bus_space_tag_t iot = fdc->sc_iot; 608 bus_space_handle_t ioh = fdc->sc_ioh; 609 u_char i; 610 int j, n = 0; 611 612 for (j = 100000; j; j--) { 613 i = bus_space_read_1(iot, ioh, FDSTS) & 614 (NE7_DIO | NE7_RQM | NE7_CB); 615 if (i == NE7_RQM) 616 return n; 617 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 618 if (n >= sizeof(fdc->sc_status)) { 619 log(LOG_ERR, "%s: overrun\n", __func__); 620 return -1; 621 } 622 fdc->sc_status[n++] = 623 bus_space_read_1(iot, ioh, FDDATA); 624 } 625 delay(10); 626 } 627 log(LOG_ERR, "%s: timeout\n", __func__); 628 return -1; 629 } 630 631 int 632 out_fdc(bus_space_tag_t iot, bus_space_handle_t ioh, uint8_t x) 633 { 634 int i = 100000; 635 636 while ((bus_space_read_1(iot, ioh, FDSTS) & NE7_DIO) && i-- > 0); 637 if (i <= 0) 638 return -1; 639 while ((bus_space_read_1(iot, ioh, FDSTS) & NE7_RQM) == 0 && i-- > 0); 640 if (i <= 0) 641 return -1; 642 bus_space_write_1(iot, ioh, FDDATA, x); 643 return 0; 644 } 645 646 int 647 fdopen(dev_t dev, int flags, int mode, struct lwp *l) 648 { 649 struct fd_softc *fd; 650 const struct fd_type *type; 651 652 fd = device_lookup_private(&fd_cd, FDUNIT(dev)); 653 if (fd == NULL) 654 return ENXIO; 655 656 type = fd_dev_to_type(fd, dev); 657 if (type == NULL) 658 return ENXIO; 659 660 if ((fd->sc_flags & FD_OPEN) != 0 && 661 memcmp(fd->sc_type, type, sizeof(*type))) 662 return EBUSY; 663 664 fd->sc_type_copy = *type; 665 fd->sc_type = &fd->sc_type_copy; 666 fd->sc_cylin = -1; 667 fd->sc_flags |= FD_OPEN; 668 669 return 0; 670 } 671 672 int 673 fdclose(dev_t dev, int flags, int mode, struct lwp *l) 674 { 675 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev)); 676 677 fd->sc_flags &= ~FD_OPEN; 678 return 0; 679 } 680 681 void 682 fdcstart(struct fdc_softc *fdc) 683 { 684 685 #ifdef DIAGNOSTIC 686 /* only got here if controller's drive queue was inactive; should 687 be in idle state */ 688 if (fdc->sc_state != DEVIDLE) { 689 printf("%s: not idle\n", __func__); 690 return; 691 } 692 #endif 693 (void)fdcintr(fdc); 694 } 695 696 static void 697 fdcpstatus(int n, struct fdc_softc *fdc) 698 { 699 char bits[64]; 700 701 switch (n) { 702 case 0: 703 printf("\n"); 704 break; 705 case 2: 706 snprintb(bits, sizeof(bits), NE7_ST0BITS, fdc->sc_status[0]); 707 printf(" (st0 %s cyl %d)\n", bits, fdc->sc_status[1]); 708 break; 709 case 7: 710 snprintb(bits, sizeof(bits), NE7_ST0BITS, fdc->sc_status[0]); 711 printf(" (st0 %s", bits); 712 snprintb(bits, sizeof(bits), NE7_ST1BITS, fdc->sc_status[1]); 713 printf(" st1 %s", bits); 714 snprintb(bits, sizeof(bits), NE7_ST2BITS, fdc->sc_status[2]); 715 printf(" st2 %s", bits); 716 printf(" cyl %d head %d sec %d)\n", 717 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 718 break; 719 #ifdef DIAGNOSTIC 720 default: 721 printf("\nfdcstatus: weird size"); 722 break; 723 #endif 724 } 725 } 726 727 void 728 fdcstatus(device_t dev, int n, const char *s) 729 { 730 struct fdc_softc *fdc = device_private(device_parent(dev)); 731 732 if (n == 0) { 733 out_fdc(fdc->sc_iot, fdc->sc_ioh, NE7CMD_SENSEI); 734 (void)fdcresult(fdc); 735 n = 2; 736 } 737 738 printf("%s: %s", device_xname(dev), s); 739 fdcpstatus(n, fdc); 740 } 741 742 void 743 fdctimeout(void *arg) 744 { 745 struct fdc_softc *fdc = arg; 746 struct fd_softc *fd = TAILQ_FIRST(&fdc->sc_drives); 747 int s; 748 749 s = splbio(); 750 #ifdef DEBUG 751 log(LOG_ERR, "%s: state %d\n", __func__, fdc->sc_state); 752 #endif 753 fdcstatus(fd->sc_dev, 0, "timeout"); 754 755 if (bufq_peek(fd->sc_q) != NULL) 756 fdc->sc_state++; 757 else 758 fdc->sc_state = DEVIDLE; 759 760 (void)fdcintr(fdc); 761 splx(s); 762 } 763 764 void 765 fdcpseudointr(void *arg) 766 { 767 int s; 768 769 /* Just ensure it has the right spl. */ 770 s = splbio(); 771 (void)fdcintr(arg); 772 splx(s); 773 } 774 775 int 776 fdcintr(void *arg) 777 { 778 struct fdc_softc *fdc = arg; 779 #define st0 fdc->sc_status[0] 780 #define cyl fdc->sc_status[1] 781 struct fd_softc *fd; 782 struct buf *bp; 783 bus_space_tag_t iot = fdc->sc_iot; 784 bus_space_handle_t ioh = fdc->sc_ioh; 785 int read, head, sec, i, nblks; 786 struct fd_type *type; 787 788 loop: 789 /* Is there a drive for the controller to do a transfer with? */ 790 fd = TAILQ_FIRST(&fdc->sc_drives); 791 if (fd == NULL) { 792 fdc->sc_state = DEVIDLE; 793 return 1; 794 } 795 796 /* Is there a transfer to this drive? If not, deactivate drive. */ 797 bp = bufq_peek(fd->sc_q); 798 if (bp == NULL) { 799 fd->sc_ops = 0; 800 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 801 fd->sc_active = 0; 802 goto loop; 803 } 804 805 switch (fdc->sc_state) { 806 case DEVIDLE: 807 fdc->sc_errors = 0; 808 fd->sc_skip = 0; 809 fd->sc_bcount = bp->b_bcount; 810 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 811 callout_stop(&fd->sc_motoroff_ch); 812 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 813 fdc->sc_state = MOTORWAIT; 814 return 1; 815 } 816 if ((fd->sc_flags & FD_MOTOR) == 0) { 817 /* Turn on the motor, being careful about pairing. */ 818 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 819 if (ofd && ofd->sc_flags & FD_MOTOR) { 820 callout_stop(&ofd->sc_motoroff_ch); 821 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 822 } 823 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 824 fd_set_motor(fdc, 0); 825 fdc->sc_state = MOTORWAIT; 826 /* Allow .25s for motor to stabilize. */ 827 callout_reset(&fd->sc_motoron_ch, hz / 4, 828 fd_motor_on, fd); 829 return 1; 830 } 831 /* Make sure the right drive is selected. */ 832 fd_set_motor(fdc, 0); 833 834 /* fall through */ 835 case DOSEEK: 836 doseek: 837 if (fd->sc_cylin == bp->b_cylinder) 838 goto doio; 839 840 out_fdc(iot, ioh, NE7CMD_SPECIFY);/* specify command */ 841 out_fdc(iot, ioh, fd->sc_type->steprate); 842 out_fdc(iot, ioh, 6); /* XXX head load time == 6ms */ 843 844 out_fdc(iot, ioh, NE7CMD_SEEK); /* seek function */ 845 out_fdc(iot, ioh, fd->sc_drive); /* drive number */ 846 out_fdc(iot, ioh, bp->b_cylinder * fd->sc_type->step); 847 848 fd->sc_cylin = -1; 849 fdc->sc_state = SEEKWAIT; 850 851 iostat_seek(fd->sc_dk.dk_stats); 852 disk_busy(&fd->sc_dk); 853 854 callout_reset(&fdc->sc_timo_ch, 4 * hz, fdctimeout, fdc); 855 return 1; 856 857 case DOIO: 858 doio: 859 type = fd->sc_type; 860 sec = fd->sc_blkno % type->seccyl; 861 nblks = type->seccyl - sec; 862 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 863 nblks = min(nblks, fdc->sc_maxiosize / FDC_BSIZE); 864 fd->sc_nblks = nblks; 865 fd->sc_nbytes = nblks * FDC_BSIZE; 866 head = sec / type->sectrac; 867 sec -= head * type->sectrac; 868 #ifdef DIAGNOSTIC 869 { 870 int block; 871 block = (fd->sc_cylin * type->heads + head) * 872 type->sectrac + sec; 873 if (block != fd->sc_blkno) { 874 printf("%s: block %d != blkno %" PRId64 875 "\n", __func__, block, fd->sc_blkno); 876 #ifdef DDB 877 Debugger(); 878 #endif 879 } 880 } 881 #endif 882 read = (bp->b_flags & B_READ) != 0; 883 FDCDMA_START(fdc, (uint8_t *)bp->b_data + fd->sc_skip, 884 fd->sc_nbytes, read); 885 bus_space_write_1(iot, ioh, FDCTL, type->rate); 886 #ifdef FD_DEBUG 887 printf("%s: %s drive %d track %d head %d sec %d nblks %d\n", 888 __func__, read ? "read" : "write", fd->sc_drive, 889 fd->sc_cylin, head, sec, nblks); 890 #endif 891 if (read) 892 out_fdc(iot, ioh, NE7CMD_READ); /* READ */ 893 else 894 out_fdc(iot, ioh, NE7CMD_WRITE);/* WRITE */ 895 out_fdc(iot, ioh, (head << 2) | fd->sc_drive); 896 out_fdc(iot, ioh, fd->sc_cylin); /* track */ 897 out_fdc(iot, ioh, head); 898 out_fdc(iot, ioh, sec + 1); /* sector + 1 */ 899 out_fdc(iot, ioh, type->secsize); /* sector size */ 900 out_fdc(iot, ioh, type->sectrac); /* sectors/track */ 901 out_fdc(iot, ioh, type->gap1); /* gap1 size */ 902 out_fdc(iot, ioh, type->datalen); /* data length */ 903 fdc->sc_state = IOCOMPLETE; 904 905 disk_busy(&fd->sc_dk); 906 907 /* allow 2 seconds for operation */ 908 callout_reset(&fdc->sc_timo_ch, 2 * hz, fdctimeout, fdc); 909 return 1; /* will return later */ 910 911 case SEEKWAIT: 912 callout_stop(&fdc->sc_timo_ch); 913 fdc->sc_state = SEEKCOMPLETE; 914 /* allow 1/50 second for heads to settle */ 915 callout_reset(&fdc->sc_intr_ch, hz / 50, fdcpseudointr, fdc); 916 return 1; 917 918 case SEEKCOMPLETE: 919 disk_unbusy(&fd->sc_dk, 0, 0); 920 921 /* Make sure seek really happened. */ 922 out_fdc(iot, ioh, NE7CMD_SENSEI); 923 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || 924 cyl != bp->b_cylinder * fd->sc_type->step) { 925 #ifdef FD_DEBUG 926 fdcstatus(fd->sc_dev, 2, "seek failed"); 927 #endif 928 fdcretry(fdc); 929 goto loop; 930 } 931 fd->sc_cylin = bp->b_cylinder; 932 goto doio; 933 934 case IOTIMEDOUT: 935 FDCDMA_ABORT(fdc); 936 937 case SEEKTIMEDOUT: 938 case RECALTIMEDOUT: 939 case RESETTIMEDOUT: 940 fdcretry(fdc); 941 goto loop; 942 943 case IOCOMPLETE: /* IO DONE, post-analyze */ 944 callout_stop(&fdc->sc_timo_ch); 945 946 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid), 947 (bp->b_flags & B_READ)); 948 949 i = fdcresult(fdc); 950 if (i != 7 || (st0 & 0xf8) != 0) { 951 FDCDMA_ABORT(fdc); 952 #ifdef FD_DEBUG 953 fdcstatus(fd->sc_dev, 7, bp->b_flags & B_READ ? 954 "read failed" : "write failed"); 955 printf("blkno %" PRId64 " nblks %d\n", 956 fd->sc_blkno, fd->sc_nblks); 957 #endif 958 fdcretry(fdc); 959 goto loop; 960 } 961 FDCDMA_DONE(fdc); 962 if (fdc->sc_errors) { 963 diskerr(bp, "fd", "soft error (corrected)", LOG_PRINTF, 964 fd->sc_skip / FDC_BSIZE, NULL); 965 printf("\n"); 966 fdc->sc_errors = 0; 967 } 968 fd->sc_blkno += fd->sc_nblks; 969 fd->sc_skip += fd->sc_nbytes; 970 fd->sc_bcount -= fd->sc_nbytes; 971 if (fd->sc_bcount > 0) { 972 bp->b_cylinder = fd->sc_blkno / fd->sc_type->seccyl; 973 goto doseek; 974 } 975 fdfinish(fd, bp); 976 goto loop; 977 978 case DORESET: 979 /* try a reset, keep motor on */ 980 fd_set_motor(fdc, 1); 981 delay(100); 982 fd_set_motor(fdc, 0); 983 fdc->sc_state = RESETCOMPLETE; 984 callout_reset(&fdc->sc_timo_ch, hz / 2, fdctimeout, fdc); 985 return 1; /* will return later */ 986 987 case RESETCOMPLETE: 988 callout_stop(&fdc->sc_timo_ch); 989 /* clear the controller output buffer */ 990 for (i = 0; i < 4; i++) { 991 out_fdc(iot, ioh, NE7CMD_SENSEI); 992 (void)fdcresult(fdc); 993 } 994 995 /* fall through */ 996 case DORECAL: 997 out_fdc(iot, ioh, NE7CMD_RECAL); /* recalibrate function */ 998 out_fdc(iot, ioh, fd->sc_drive); 999 fdc->sc_state = RECALWAIT; 1000 callout_reset(&fdc->sc_timo_ch, 5 * hz, fdctimeout, fdc); 1001 return 1; /* will return later */ 1002 1003 case RECALWAIT: 1004 callout_stop(&fdc->sc_timo_ch); 1005 fdc->sc_state = RECALCOMPLETE; 1006 /* allow 1/30 second for heads to settle */ 1007 callout_reset(&fdc->sc_intr_ch, hz / 30, fdcpseudointr, fdc); 1008 return 1; /* will return later */ 1009 1010 case RECALCOMPLETE: 1011 out_fdc(iot, ioh, NE7CMD_SENSEI); 1012 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1013 #ifdef FD_DEBUG 1014 fdcstatus(fd->sc_dev, 2, "recalibrate failed"); 1015 #endif 1016 fdcretry(fdc); 1017 goto loop; 1018 } 1019 fd->sc_cylin = 0; 1020 goto doseek; 1021 1022 case MOTORWAIT: 1023 if (fd->sc_flags & FD_MOTOR_WAIT) 1024 return 1; /* time's not up yet */ 1025 goto doseek; 1026 1027 default: 1028 fdcstatus(fd->sc_dev, 0, "stray interrupt"); 1029 return 1; 1030 } 1031 #ifdef DIAGNOSTIC 1032 panic("%s: impossible", __func__); 1033 #endif 1034 #undef st0 1035 #undef cyl 1036 } 1037 1038 void 1039 fdcretry(struct fdc_softc *fdc) 1040 { 1041 struct fd_softc *fd; 1042 struct buf *bp; 1043 1044 fd = TAILQ_FIRST(&fdc->sc_drives); 1045 bp = bufq_peek(fd->sc_q); 1046 1047 switch (fdc->sc_errors) { 1048 case 0: 1049 /* try again */ 1050 fdc->sc_state = DOSEEK; 1051 break; 1052 1053 case 1: 1054 case 2: 1055 case 3: 1056 /* didn't work; try recalibrating */ 1057 fdc->sc_state = DORECAL; 1058 break; 1059 1060 case 4: 1061 /* still no go; reset the bastard */ 1062 fdc->sc_state = DORESET; 1063 break; 1064 1065 default: 1066 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1067 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1068 1069 fdcpstatus(7, fdc); 1070 bp->b_error = EIO; 1071 fdfinish(fd, bp); 1072 } 1073 fdc->sc_errors++; 1074 } 1075 1076 int 1077 fdioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 1078 { 1079 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev)); 1080 struct disklabel buffer; 1081 int error; 1082 1083 switch (cmd) { 1084 case DIOCGDINFO: 1085 memset(&buffer, 0, sizeof(buffer)); 1086 1087 buffer.d_secpercyl = fd->sc_type->seccyl; 1088 buffer.d_type = DTYPE_FLOPPY; 1089 buffer.d_secsize = FDC_BSIZE; 1090 1091 if (readdisklabel(dev, fdstrategy, &buffer, NULL) != NULL) 1092 return EINVAL; 1093 1094 *(struct disklabel *)addr = buffer; 1095 return 0; 1096 1097 case DIOCWLABEL: 1098 if ((flag & FWRITE) == 0) 1099 return EBADF; 1100 /* XXX do something */ 1101 return 0; 1102 1103 case DIOCWDINFO: 1104 if ((flag & FWRITE) == 0) 1105 return EBADF; 1106 1107 error = setdisklabel(&buffer, (struct disklabel *)addr, 1108 0, NULL); 1109 if (error) 1110 return error; 1111 1112 error = writedisklabel(dev, fdstrategy, &buffer, NULL); 1113 return error; 1114 1115 default: 1116 return ENOTTY; 1117 } 1118 1119 #ifdef DIAGNOSTIC 1120 panic("%s: impossible", __func__); 1121 #endif 1122 } 1123 1124 /* 1125 * Mountroot hook: prompt the user to enter the root file system floppy. 1126 */ 1127 void 1128 fd_mountroot_hook(device_t dev) 1129 { 1130 int c; 1131 1132 printf("Insert filesystem floppy and press return."); 1133 cnpollc(1); 1134 for (;;) { 1135 c = cngetc(); 1136 if ((c == '\r') || (c == '\n')) { 1137 printf("\n"); 1138 break; 1139 } 1140 } 1141 cnpollc(0); 1142 } 1143
Indexes created Thu Oct 02 07:10:07 GMT 2025