fd.c revision 1.44
1 /* $NetBSD: fd.c,v 1.44 2014/07/25 08:02:18 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 1.44 2014/07/25 08:02:18 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_flag = D_DISK 212 }; 213 214 static void fdstart(struct fd_softc *); 215 216 struct dkdriver fddkdriver = { fdstrategy }; 217 218 static bool fd_shutdown(device_t, int); 219 #if 0 220 static const struct fd_type *fd_nvtotype(char *, int, int); 221 #endif 222 static void fd_set_motor(struct fdc_softc *, int); 223 static void fd_motor_off(void *); 224 static void fd_motor_on(void *); 225 static int fdcresult(struct fdc_softc *); 226 static void fdcstart(struct fdc_softc *); 227 static void fdcstatus(device_t, int, const char *); 228 static void fdctimeout(void *); 229 static void fdcpseudointr(void *); 230 static void fdcretry(struct fdc_softc *); 231 static void fdfinish(struct fd_softc *, struct buf *); 232 static inline const struct fd_type *fd_dev_to_type(struct fd_softc *, dev_t); 233 static void fd_mountroot_hook(device_t); 234 235 /* 236 * Arguments passed between fdcattach and fdprobe. 237 */ 238 struct fdc_attach_args { 239 int fa_drive; 240 const struct fd_type *fa_deftype; 241 }; 242 243 /* 244 * Print the location of a disk drive (called just before attaching the 245 * the drive). If `fdc' is not NULL, the drive was found but was not 246 * in the system config file; print the drive name as well. 247 * Return QUIET (config_find ignores this if the device was configured) to 248 * avoid printing `fdN not configured' messages. 249 */ 250 static int 251 fdprint(void *aux, const char *fdc) 252 { 253 struct fdc_attach_args *fa = aux; 254 255 if (fdc == NULL) 256 aprint_normal(" drive %d", fa->fa_drive); 257 return QUIET; 258 } 259 260 void 261 fdcattach(struct fdc_softc *fdc) 262 { 263 struct fdc_attach_args fa; 264 int type; 265 266 callout_init(&fdc->sc_timo_ch, 0); 267 callout_init(&fdc->sc_intr_ch, 0); 268 269 fdc->sc_state = DEVIDLE; 270 TAILQ_INIT(&fdc->sc_drives); 271 272 /* 273 * No way yet to determine default disk types. 274 * we assume 1.44 3.5" type for the moment. 275 */ 276 type = 0; 277 278 /* physical limit: two drives per controller. */ 279 for (fa.fa_drive = 0; fa.fa_drive < 2; fa.fa_drive++) { 280 fa.fa_deftype = &fd_types[type]; 281 (void)config_found(fdc->sc_dev, (void *)&fa, fdprint); 282 } 283 } 284 285 static int 286 fdprobe(device_t parent, cfdata_t cf , void *aux) 287 { 288 struct fdc_softc *fdc = device_private(parent); 289 struct fdc_attach_args *fa = aux; 290 int drive = fa->fa_drive; 291 bus_space_tag_t iot = fdc->sc_iot; 292 bus_space_handle_t ioh = fdc->sc_ioh; 293 int n; 294 295 if (cf->cf_loc[FDCCF_DRIVE] != FDCCF_DRIVE_DEFAULT && 296 cf->cf_loc[FDCCF_DRIVE] != drive) 297 return 0; 298 299 /* select drive and turn on motor */ 300 bus_space_write_1(iot, ioh, FDOUT, drive | FDO_FRST | FDO_MOEN(drive)); 301 /* wait for motor to spin up */ 302 delay(250000); 303 out_fdc(iot, ioh, NE7CMD_RECAL); 304 out_fdc(iot, ioh, drive); 305 /* wait for recalibrate */ 306 delay(2000000); 307 out_fdc(iot, ioh, NE7CMD_SENSEI); 308 n = fdcresult(fdc); 309 #ifdef FD_DEBUG 310 { 311 int i; 312 aprint_debug("%s: status", __func__); 313 for (i = 0; i < n; i++) 314 aprint_debug(" %x", fdc->sc_status[i]); 315 aprint_debug("\n"); 316 } 317 #endif 318 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 319 return 0; 320 /* turn off motor */ 321 bus_space_write_1(iot, ioh, FDOUT, FDO_FRST); 322 323 return 1; 324 } 325 326 /* 327 * Controller is working, and drive responded. Attach it. 328 */ 329 void 330 fdattach(device_t parent, device_t self, void *aux) 331 { 332 struct fdc_softc *fdc = device_private(parent); 333 struct fd_softc *fd = device_private(self); 334 struct fdc_attach_args *fa = aux; 335 const struct fd_type *type = fa->fa_deftype; 336 int drive = fa->fa_drive; 337 338 fd->sc_dev = self; 339 340 callout_init(&fd->sc_motoron_ch, 0); 341 callout_init(&fd->sc_motoroff_ch, 0); 342 343 /* XXX Allow `flags' to override device type? */ 344 345 if (type) 346 printf(": %s, %d cyl, %d head, %d sec\n", type->name, 347 type->cyls, type->heads, type->sectrac); 348 else 349 printf(": density unknown\n"); 350 351 bufq_alloc(&fd->sc_q, "disksort", BUFQ_SORT_CYLINDER); 352 fd->sc_cylin = -1; 353 fd->sc_drive = drive; 354 fd->sc_deftype = type; 355 fdc->sc_fd[drive] = fd; 356 357 /* 358 * Initialize and attach the disk structure. 359 */ 360 disk_init(&fd->sc_dk, device_xname(fd->sc_dev), &fddkdriver); 361 disk_attach(&fd->sc_dk); 362 363 /* Establish a mountroot hook. */ 364 mountroothook_establish(fd_mountroot_hook, fd->sc_dev); 365 366 /* Needed to power off if the motor is on when we halt. */ 367 if (!pmf_device_register1(self, NULL, NULL, fd_shutdown)) 368 aprint_error_dev(self, "couldn't establish power handler\n"); 369 } 370 371 bool 372 fd_shutdown(device_t self, int howto) 373 { 374 struct fd_softc *fd; 375 376 fd = device_private(self); 377 fd_motor_off(fd); 378 379 return true; 380 } 381 382 #if 0 383 /* 384 * Translate nvram type into internal data structure. Return NULL for 385 * none/unknown/unusable. 386 */ 387 static const struct fd_type * 388 fd_nvtotype(char *fdc, int nvraminfo, int drive) 389 { 390 int type; 391 392 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0; 393 #if 0 394 switch (type) { 395 case NVRAM_DISKETTE_NONE: 396 return NULL; 397 case NVRAM_DISKETTE_12M: 398 return &fd_types[1]; 399 case NVRAM_DISKETTE_TYPE5: 400 case NVRAM_DISKETTE_TYPE6: 401 /* XXX We really ought to handle 2.88MB format. */ 402 case NVRAM_DISKETTE_144M: 403 return &fd_types[0]; 404 case NVRAM_DISKETTE_360K: 405 return &fd_types[3]; 406 case NVRAM_DISKETTE_720K: 407 return &fd_types[4]; 408 default: 409 printf("%s: drive %d: unknown device type 0x%x\n", 410 fdc, drive, type); 411 return NULL; 412 } 413 #else 414 return &fd_types[0]; /* Use only 1.44 for now */ 415 #endif 416 } 417 #endif 418 419 static inline const struct fd_type * 420 fd_dev_to_type(struct fd_softc *fd, dev_t dev) 421 { 422 int type = FDTYPE(dev); 423 424 if (type > __arraycount(fd_types)) 425 return NULL; 426 return type ? &fd_types[type - 1] : fd->sc_deftype; 427 } 428 429 void 430 fdstrategy(struct buf *bp) 431 { 432 struct fd_softc *fd = device_lookup_private(&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 done; 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 done; 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("%s: b_blkno %" PRId64 " b_bcount %ld blkno %" PRId64 470 " cylin %ld sz %d\n", __func__, 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 = 483 device_private(device_parent(fd->sc_dev)); 484 if (fdc->sc_state == DEVIDLE) { 485 printf("%s: controller inactive\n", __func__); 486 fdcstart(fdc); 487 } 488 } 489 #endif 490 splx(s); 491 return; 492 493 done: 494 /* Toss transfer; we're done early. */ 495 bp->b_resid = bp->b_bcount; 496 biodone(bp); 497 } 498 499 void 500 fdstart(struct fd_softc *fd) 501 { 502 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 503 int active = TAILQ_FIRST(&fdc->sc_drives) != 0; 504 505 /* Link into controller queue. */ 506 fd->sc_active = 1; 507 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 508 509 /* If controller not already active, start it. */ 510 if (!active) 511 fdcstart(fdc); 512 } 513 514 void 515 fdfinish(struct fd_softc *fd, struct buf *bp) 516 { 517 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 518 519 /* 520 * Move this drive to the end of the queue to give others a `fair' 521 * chance. We only force a switch if N operations are completed while 522 * another drive is waiting to be serviced, since there is a long motor 523 * startup delay whenever we switch. 524 */ 525 (void)bufq_get(fd->sc_q); 526 if (TAILQ_NEXT(fd, sc_drivechain) && ++fd->sc_ops >= 8) { 527 fd->sc_ops = 0; 528 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 529 if (bufq_peek(fd->sc_q) != NULL) 530 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 531 else 532 fd->sc_active = 0; 533 } 534 bp->b_resid = fd->sc_bcount; 535 fd->sc_skip = 0; 536 biodone(bp); 537 /* turn off motor 5s from now */ 538 callout_reset(&fd->sc_motoroff_ch, 5 * hz, fd_motor_off, fd); 539 fdc->sc_state = DEVIDLE; 540 } 541 542 int 543 fdread(dev_t dev, struct uio *uio, int flags) 544 { 545 546 return physio(fdstrategy, NULL, dev, B_READ, minphys, uio); 547 } 548 549 int 550 fdwrite(dev_t dev, struct uio *uio, int flags) 551 { 552 553 return physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio); 554 } 555 556 void 557 fd_set_motor(struct fdc_softc *fdc, int reset) 558 { 559 struct fd_softc *fd; 560 u_char status; 561 int n; 562 563 if ((fd = TAILQ_FIRST(&fdc->sc_drives)) != NULL) 564 status = fd->sc_drive; 565 else 566 status = 0; 567 if (!reset) 568 status |= FDO_FRST | FDO_FDMAEN; 569 for (n = 0; n < 4; n++) 570 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 571 status |= FDO_MOEN(n); 572 bus_space_write_1(fdc->sc_iot, fdc->sc_ioh, FDOUT, status); 573 } 574 575 void 576 fd_motor_off(void *arg) 577 { 578 struct fd_softc *fd = arg; 579 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 580 int s; 581 582 s = splbio(); 583 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 584 fd_set_motor(fdc, 0); 585 splx(s); 586 } 587 588 void 589 fd_motor_on(void *arg) 590 { 591 struct fd_softc *fd = arg; 592 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 593 int s; 594 595 s = splbio(); 596 fd->sc_flags &= ~FD_MOTOR_WAIT; 597 if ((TAILQ_FIRST(&fdc->sc_drives) == fd) && 598 (fdc->sc_state == MOTORWAIT)) 599 (void)fdcintr(fdc); 600 splx(s); 601 } 602 603 int 604 fdcresult(struct fdc_softc *fdc) 605 { 606 bus_space_tag_t iot = fdc->sc_iot; 607 bus_space_handle_t ioh = fdc->sc_ioh; 608 u_char i; 609 int j, n = 0; 610 611 for (j = 100000; j; j--) { 612 i = bus_space_read_1(iot, ioh, FDSTS) & 613 (NE7_DIO | NE7_RQM | NE7_CB); 614 if (i == NE7_RQM) 615 return n; 616 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 617 if (n >= sizeof(fdc->sc_status)) { 618 log(LOG_ERR, "%s: overrun\n", __func__); 619 return -1; 620 } 621 fdc->sc_status[n++] = 622 bus_space_read_1(iot, ioh, FDDATA); 623 } 624 delay(10); 625 } 626 log(LOG_ERR, "%s: timeout\n", __func__); 627 return -1; 628 } 629 630 int 631 out_fdc(bus_space_tag_t iot, bus_space_handle_t ioh, uint8_t x) 632 { 633 int i = 100000; 634 635 while ((bus_space_read_1(iot, ioh, FDSTS) & NE7_DIO) && i-- > 0); 636 if (i <= 0) 637 return -1; 638 while ((bus_space_read_1(iot, ioh, FDSTS) & NE7_RQM) == 0 && i-- > 0); 639 if (i <= 0) 640 return -1; 641 bus_space_write_1(iot, ioh, FDDATA, x); 642 return 0; 643 } 644 645 int 646 fdopen(dev_t dev, int flags, int mode, struct lwp *l) 647 { 648 struct fd_softc *fd; 649 const struct fd_type *type; 650 651 fd = device_lookup_private(&fd_cd, FDUNIT(dev)); 652 if (fd == NULL) 653 return ENXIO; 654 655 type = fd_dev_to_type(fd, dev); 656 if (type == NULL) 657 return ENXIO; 658 659 if ((fd->sc_flags & FD_OPEN) != 0 && 660 memcmp(fd->sc_type, type, sizeof(*type))) 661 return EBUSY; 662 663 fd->sc_type_copy = *type; 664 fd->sc_type = &fd->sc_type_copy; 665 fd->sc_cylin = -1; 666 fd->sc_flags |= FD_OPEN; 667 668 return 0; 669 } 670 671 int 672 fdclose(dev_t dev, int flags, int mode, struct lwp *l) 673 { 674 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev)); 675 676 fd->sc_flags &= ~FD_OPEN; 677 return 0; 678 } 679 680 void 681 fdcstart(struct fdc_softc *fdc) 682 { 683 684 #ifdef DIAGNOSTIC 685 /* only got here if controller's drive queue was inactive; should 686 be in idle state */ 687 if (fdc->sc_state != DEVIDLE) { 688 printf("%s: not idle\n", __func__); 689 return; 690 } 691 #endif 692 (void)fdcintr(fdc); 693 } 694 695 static void 696 fdcpstatus(int n, struct fdc_softc *fdc) 697 { 698 char bits[64]; 699 700 switch (n) { 701 case 0: 702 printf("\n"); 703 break; 704 case 2: 705 snprintb(bits, sizeof(bits), NE7_ST0BITS, fdc->sc_status[0]); 706 printf(" (st0 %s cyl %d)\n", bits, fdc->sc_status[1]); 707 break; 708 case 7: 709 snprintb(bits, sizeof(bits), NE7_ST0BITS, fdc->sc_status[0]); 710 printf(" (st0 %s", bits); 711 snprintb(bits, sizeof(bits), NE7_ST1BITS, fdc->sc_status[1]); 712 printf(" st1 %s", bits); 713 snprintb(bits, sizeof(bits), NE7_ST2BITS, fdc->sc_status[2]); 714 printf(" st2 %s", bits); 715 printf(" cyl %d head %d sec %d)\n", 716 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 717 break; 718 #ifdef DIAGNOSTIC 719 default: 720 printf("\nfdcstatus: weird size"); 721 break; 722 #endif 723 } 724 } 725 726 void 727 fdcstatus(device_t dev, int n, const char *s) 728 { 729 struct fdc_softc *fdc = device_private(device_parent(dev)); 730 731 if (n == 0) { 732 out_fdc(fdc->sc_iot, fdc->sc_ioh, NE7CMD_SENSEI); 733 (void)fdcresult(fdc); 734 n = 2; 735 } 736 737 printf("%s: %s", device_xname(dev), s); 738 fdcpstatus(n, fdc); 739 } 740 741 void 742 fdctimeout(void *arg) 743 { 744 struct fdc_softc *fdc = arg; 745 struct fd_softc *fd = TAILQ_FIRST(&fdc->sc_drives); 746 int s; 747 748 s = splbio(); 749 #ifdef DEBUG 750 log(LOG_ERR, "%s: state %d\n", __func__, fdc->sc_state); 751 #endif 752 fdcstatus(fd->sc_dev, 0, "timeout"); 753 754 if (bufq_peek(fd->sc_q) != NULL) 755 fdc->sc_state++; 756 else 757 fdc->sc_state = DEVIDLE; 758 759 (void)fdcintr(fdc); 760 splx(s); 761 } 762 763 void 764 fdcpseudointr(void *arg) 765 { 766 int s; 767 768 /* Just ensure it has the right spl. */ 769 s = splbio(); 770 (void)fdcintr(arg); 771 splx(s); 772 } 773 774 int 775 fdcintr(void *arg) 776 { 777 struct fdc_softc *fdc = arg; 778 #define st0 fdc->sc_status[0] 779 #define cyl fdc->sc_status[1] 780 struct fd_softc *fd; 781 struct buf *bp; 782 bus_space_tag_t iot = fdc->sc_iot; 783 bus_space_handle_t ioh = fdc->sc_ioh; 784 int read, head, sec, i, nblks; 785 struct fd_type *type; 786 787 loop: 788 /* Is there a drive for the controller to do a transfer with? */ 789 fd = TAILQ_FIRST(&fdc->sc_drives); 790 if (fd == NULL) { 791 fdc->sc_state = DEVIDLE; 792 return 1; 793 } 794 795 /* Is there a transfer to this drive? If not, deactivate drive. */ 796 bp = bufq_peek(fd->sc_q); 797 if (bp == NULL) { 798 fd->sc_ops = 0; 799 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 800 fd->sc_active = 0; 801 goto loop; 802 } 803 804 switch (fdc->sc_state) { 805 case DEVIDLE: 806 fdc->sc_errors = 0; 807 fd->sc_skip = 0; 808 fd->sc_bcount = bp->b_bcount; 809 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 810 callout_stop(&fd->sc_motoroff_ch); 811 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 812 fdc->sc_state = MOTORWAIT; 813 return 1; 814 } 815 if ((fd->sc_flags & FD_MOTOR) == 0) { 816 /* Turn on the motor, being careful about pairing. */ 817 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 818 if (ofd && ofd->sc_flags & FD_MOTOR) { 819 callout_stop(&ofd->sc_motoroff_ch); 820 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 821 } 822 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 823 fd_set_motor(fdc, 0); 824 fdc->sc_state = MOTORWAIT; 825 /* Allow .25s for motor to stabilize. */ 826 callout_reset(&fd->sc_motoron_ch, hz / 4, 827 fd_motor_on, fd); 828 return 1; 829 } 830 /* Make sure the right drive is selected. */ 831 fd_set_motor(fdc, 0); 832 833 /* fall through */ 834 case DOSEEK: 835 doseek: 836 if (fd->sc_cylin == bp->b_cylinder) 837 goto doio; 838 839 out_fdc(iot, ioh, NE7CMD_SPECIFY);/* specify command */ 840 out_fdc(iot, ioh, fd->sc_type->steprate); 841 out_fdc(iot, ioh, 6); /* XXX head load time == 6ms */ 842 843 out_fdc(iot, ioh, NE7CMD_SEEK); /* seek function */ 844 out_fdc(iot, ioh, fd->sc_drive); /* drive number */ 845 out_fdc(iot, ioh, bp->b_cylinder * fd->sc_type->step); 846 847 fd->sc_cylin = -1; 848 fdc->sc_state = SEEKWAIT; 849 850 iostat_seek(fd->sc_dk.dk_stats); 851 disk_busy(&fd->sc_dk); 852 853 callout_reset(&fdc->sc_timo_ch, 4 * hz, fdctimeout, fdc); 854 return 1; 855 856 case DOIO: 857 doio: 858 type = fd->sc_type; 859 sec = fd->sc_blkno % type->seccyl; 860 nblks = type->seccyl - sec; 861 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 862 nblks = min(nblks, fdc->sc_maxiosize / FDC_BSIZE); 863 fd->sc_nblks = nblks; 864 fd->sc_nbytes = nblks * FDC_BSIZE; 865 head = sec / type->sectrac; 866 sec -= head * type->sectrac; 867 #ifdef DIAGNOSTIC 868 { 869 int block; 870 block = (fd->sc_cylin * type->heads + head) * 871 type->sectrac + sec; 872 if (block != fd->sc_blkno) { 873 printf("%s: block %d != blkno %" PRId64 874 "\n", __func__, block, fd->sc_blkno); 875 #ifdef DDB 876 Debugger(); 877 #endif 878 } 879 } 880 #endif 881 read = (bp->b_flags & B_READ) != 0; 882 FDCDMA_START(fdc, (uint8_t *)bp->b_data + fd->sc_skip, 883 fd->sc_nbytes, read); 884 bus_space_write_1(iot, ioh, FDCTL, type->rate); 885 #ifdef FD_DEBUG 886 printf("%s: %s drive %d track %d head %d sec %d nblks %d\n", 887 __func__, read ? "read" : "write", fd->sc_drive, 888 fd->sc_cylin, head, sec, nblks); 889 #endif 890 if (read) 891 out_fdc(iot, ioh, NE7CMD_READ); /* READ */ 892 else 893 out_fdc(iot, ioh, NE7CMD_WRITE);/* WRITE */ 894 out_fdc(iot, ioh, (head << 2) | fd->sc_drive); 895 out_fdc(iot, ioh, fd->sc_cylin); /* track */ 896 out_fdc(iot, ioh, head); 897 out_fdc(iot, ioh, sec + 1); /* sector + 1 */ 898 out_fdc(iot, ioh, type->secsize); /* sector size */ 899 out_fdc(iot, ioh, type->sectrac); /* sectors/track */ 900 out_fdc(iot, ioh, type->gap1); /* gap1 size */ 901 out_fdc(iot, ioh, type->datalen); /* data length */ 902 fdc->sc_state = IOCOMPLETE; 903 904 disk_busy(&fd->sc_dk); 905 906 /* allow 2 seconds for operation */ 907 callout_reset(&fdc->sc_timo_ch, 2 * hz, fdctimeout, fdc); 908 return 1; /* will return later */ 909 910 case SEEKWAIT: 911 callout_stop(&fdc->sc_timo_ch); 912 fdc->sc_state = SEEKCOMPLETE; 913 /* allow 1/50 second for heads to settle */ 914 callout_reset(&fdc->sc_intr_ch, hz / 50, fdcpseudointr, fdc); 915 return 1; 916 917 case SEEKCOMPLETE: 918 disk_unbusy(&fd->sc_dk, 0, 0); 919 920 /* Make sure seek really happened. */ 921 out_fdc(iot, ioh, NE7CMD_SENSEI); 922 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || 923 cyl != bp->b_cylinder * fd->sc_type->step) { 924 #ifdef FD_DEBUG 925 fdcstatus(fd->sc_dev, 2, "seek failed"); 926 #endif 927 fdcretry(fdc); 928 goto loop; 929 } 930 fd->sc_cylin = bp->b_cylinder; 931 goto doio; 932 933 case IOTIMEDOUT: 934 FDCDMA_ABORT(fdc); 935 936 case SEEKTIMEDOUT: 937 case RECALTIMEDOUT: 938 case RESETTIMEDOUT: 939 fdcretry(fdc); 940 goto loop; 941 942 case IOCOMPLETE: /* IO DONE, post-analyze */ 943 callout_stop(&fdc->sc_timo_ch); 944 945 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid), 946 (bp->b_flags & B_READ)); 947 948 i = fdcresult(fdc); 949 if (i != 7 || (st0 & 0xf8) != 0) { 950 FDCDMA_ABORT(fdc); 951 #ifdef FD_DEBUG 952 fdcstatus(fd->sc_dev, 7, bp->b_flags & B_READ ? 953 "read failed" : "write failed"); 954 printf("blkno %" PRId64 " nblks %d\n", 955 fd->sc_blkno, fd->sc_nblks); 956 #endif 957 fdcretry(fdc); 958 goto loop; 959 } 960 FDCDMA_DONE(fdc); 961 if (fdc->sc_errors) { 962 diskerr(bp, "fd", "soft error (corrected)", LOG_PRINTF, 963 fd->sc_skip / FDC_BSIZE, NULL); 964 printf("\n"); 965 fdc->sc_errors = 0; 966 } 967 fd->sc_blkno += fd->sc_nblks; 968 fd->sc_skip += fd->sc_nbytes; 969 fd->sc_bcount -= fd->sc_nbytes; 970 if (fd->sc_bcount > 0) { 971 bp->b_cylinder = fd->sc_blkno / fd->sc_type->seccyl; 972 goto doseek; 973 } 974 fdfinish(fd, bp); 975 goto loop; 976 977 case DORESET: 978 /* try a reset, keep motor on */ 979 fd_set_motor(fdc, 1); 980 delay(100); 981 fd_set_motor(fdc, 0); 982 fdc->sc_state = RESETCOMPLETE; 983 callout_reset(&fdc->sc_timo_ch, hz / 2, fdctimeout, fdc); 984 return 1; /* will return later */ 985 986 case RESETCOMPLETE: 987 callout_stop(&fdc->sc_timo_ch); 988 /* clear the controller output buffer */ 989 for (i = 0; i < 4; i++) { 990 out_fdc(iot, ioh, NE7CMD_SENSEI); 991 (void)fdcresult(fdc); 992 } 993 994 /* fall through */ 995 case DORECAL: 996 out_fdc(iot, ioh, NE7CMD_RECAL); /* recalibrate function */ 997 out_fdc(iot, ioh, fd->sc_drive); 998 fdc->sc_state = RECALWAIT; 999 callout_reset(&fdc->sc_timo_ch, 5 * hz, fdctimeout, fdc); 1000 return 1; /* will return later */ 1001 1002 case RECALWAIT: 1003 callout_stop(&fdc->sc_timo_ch); 1004 fdc->sc_state = RECALCOMPLETE; 1005 /* allow 1/30 second for heads to settle */ 1006 callout_reset(&fdc->sc_intr_ch, hz / 30, fdcpseudointr, fdc); 1007 return 1; /* will return later */ 1008 1009 case RECALCOMPLETE: 1010 out_fdc(iot, ioh, NE7CMD_SENSEI); 1011 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1012 #ifdef FD_DEBUG 1013 fdcstatus(fd->sc_dev, 2, "recalibrate failed"); 1014 #endif 1015 fdcretry(fdc); 1016 goto loop; 1017 } 1018 fd->sc_cylin = 0; 1019 goto doseek; 1020 1021 case MOTORWAIT: 1022 if (fd->sc_flags & FD_MOTOR_WAIT) 1023 return 1; /* time's not up yet */ 1024 goto doseek; 1025 1026 default: 1027 fdcstatus(fd->sc_dev, 0, "stray interrupt"); 1028 return 1; 1029 } 1030 #ifdef DIAGNOSTIC 1031 panic("%s: impossible", __func__); 1032 #endif 1033 #undef st0 1034 #undef cyl 1035 } 1036 1037 void 1038 fdcretry(struct fdc_softc *fdc) 1039 { 1040 struct fd_softc *fd; 1041 struct buf *bp; 1042 1043 fd = TAILQ_FIRST(&fdc->sc_drives); 1044 bp = bufq_peek(fd->sc_q); 1045 1046 switch (fdc->sc_errors) { 1047 case 0: 1048 /* try again */ 1049 fdc->sc_state = DOSEEK; 1050 break; 1051 1052 case 1: 1053 case 2: 1054 case 3: 1055 /* didn't work; try recalibrating */ 1056 fdc->sc_state = DORECAL; 1057 break; 1058 1059 case 4: 1060 /* still no go; reset the bastard */ 1061 fdc->sc_state = DORESET; 1062 break; 1063 1064 default: 1065 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1066 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1067 1068 fdcpstatus(7, fdc); 1069 bp->b_error = EIO; 1070 fdfinish(fd, bp); 1071 } 1072 fdc->sc_errors++; 1073 } 1074 1075 int 1076 fdioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 1077 { 1078 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev)); 1079 struct disklabel buffer; 1080 int error; 1081 1082 switch (cmd) { 1083 case DIOCGDINFO: 1084 memset(&buffer, 0, sizeof(buffer)); 1085 1086 buffer.d_secpercyl = fd->sc_type->seccyl; 1087 buffer.d_type = DTYPE_FLOPPY; 1088 buffer.d_secsize = FDC_BSIZE; 1089 1090 if (readdisklabel(dev, fdstrategy, &buffer, NULL) != NULL) 1091 return EINVAL; 1092 1093 *(struct disklabel *)addr = buffer; 1094 return 0; 1095 1096 case DIOCWLABEL: 1097 if ((flag & FWRITE) == 0) 1098 return EBADF; 1099 /* XXX do something */ 1100 return 0; 1101 1102 case DIOCWDINFO: 1103 if ((flag & FWRITE) == 0) 1104 return EBADF; 1105 1106 error = setdisklabel(&buffer, (struct disklabel *)addr, 1107 0, NULL); 1108 if (error) 1109 return error; 1110 1111 error = writedisklabel(dev, fdstrategy, &buffer, NULL); 1112 return error; 1113 1114 default: 1115 return ENOTTY; 1116 } 1117 1118 #ifdef DIAGNOSTIC 1119 panic("%s: impossible", __func__); 1120 #endif 1121 } 1122 1123 /* 1124 * Mountroot hook: prompt the user to enter the root file system floppy. 1125 */ 1126 void 1127 fd_mountroot_hook(device_t dev) 1128 { 1129 int c; 1130 1131 printf("Insert filesystem floppy and press return."); 1132 cnpollc(1); 1133 for (;;) { 1134 c = cngetc(); 1135 if ((c == '\r') || (c == '\n')) { 1136 printf("\n"); 1137 break; 1138 } 1139 } 1140 cnpollc(0); 1141 } 1142
Indexes created Thu Oct 02 07:10:07 GMT 2025