1 /* $NetBSD: fd.c,v 1.51 2021/08/07 16:18:42 thorpej 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 1.51 2021/08/07 16:18:42 thorpej 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 = { 218 .d_strategy = fdstrategy 219 }; 220 221 static bool fd_shutdown(device_t, int); 222 #if 0 223 static const struct fd_type *fd_nvtotype(char *, int, int); 224 #endif 225 static void fd_set_motor(struct fdc_softc *, int); 226 static void fd_motor_off(void *); 227 static void fd_motor_on(void *); 228 static int fdcresult(struct fdc_softc *); 229 static void fdcstart(struct fdc_softc *); 230 static void fdcstatus(device_t, int, const char *); 231 static void fdctimeout(void *); 232 static void fdcpseudointr(void *); 233 static void fdcretry(struct fdc_softc *); 234 static void fdfinish(struct fd_softc *, struct buf *); 235 static const struct fd_type *fd_dev_to_type(struct fd_softc *, dev_t); 236 static void fd_mountroot_hook(device_t); 237 238 /* 239 * Arguments passed between fdcattach and fdprobe. 240 */ 241 struct fdc_attach_args { 242 int fa_drive; 243 const struct fd_type *fa_deftype; 244 }; 245 246 /* 247 * Print the location of a disk drive (called just before attaching the 248 * the drive). If `fdc' is not NULL, the drive was found but was not 249 * in the system config file; print the drive name as well. 250 * Return QUIET (config_find ignores this if the device was configured) to 251 * avoid printing `fdN not configured' messages. 252 */ 253 static int 254 fdprint(void *aux, const char *fdc) 255 { 256 struct fdc_attach_args *fa = aux; 257 258 if (fdc == NULL) 259 aprint_normal(" drive %d", fa->fa_drive); 260 return QUIET; 261 } 262 263 void 264 fdcattach(struct fdc_softc *fdc) 265 { 266 struct fdc_attach_args fa; 267 int type; 268 269 callout_init(&fdc->sc_timo_ch, 0); 270 callout_init(&fdc->sc_intr_ch, 0); 271 272 fdc->sc_state = DEVIDLE; 273 TAILQ_INIT(&fdc->sc_drives); 274 275 /* 276 * No way yet to determine default disk types. 277 * we assume 1.44 3.5" type for the moment. 278 */ 279 type = 0; 280 281 /* physical limit: two drives per controller. */ 282 for (fa.fa_drive = 0; fa.fa_drive < 2; fa.fa_drive++) { 283 fa.fa_deftype = &fd_types[type]; 284 (void)config_found(fdc->sc_dev, (void *)&fa, fdprint, 285 CFARGS_NONE); 286 } 287 } 288 289 static int 290 fdprobe(device_t parent, cfdata_t cf , void *aux) 291 { 292 struct fdc_softc *fdc = device_private(parent); 293 struct fdc_attach_args *fa = aux; 294 int drive = fa->fa_drive; 295 bus_space_tag_t iot = fdc->sc_iot; 296 bus_space_handle_t ioh = fdc->sc_ioh; 297 int n; 298 299 if (cf->cf_loc[FDCCF_DRIVE] != FDCCF_DRIVE_DEFAULT && 300 cf->cf_loc[FDCCF_DRIVE] != drive) 301 return 0; 302 303 /* select drive and turn on motor */ 304 bus_space_write_1(iot, ioh, FDOUT, drive | FDO_FRST | FDO_MOEN(drive)); 305 /* wait for motor to spin up */ 306 delay(250000); 307 out_fdc(iot, ioh, NE7CMD_RECAL); 308 out_fdc(iot, ioh, drive); 309 /* wait for recalibrate */ 310 delay(2000000); 311 out_fdc(iot, ioh, NE7CMD_SENSEI); 312 n = fdcresult(fdc); 313 #ifdef FD_DEBUG 314 { 315 int i; 316 aprint_debug("%s: status", __func__); 317 for (i = 0; i < n; i++) 318 aprint_debug(" %x", fdc->sc_status[i]); 319 aprint_debug("\n"); 320 } 321 #endif 322 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 323 return 0; 324 /* turn off motor */ 325 bus_space_write_1(iot, ioh, FDOUT, FDO_FRST); 326 327 return 1; 328 } 329 330 /* 331 * Controller is working, and drive responded. Attach it. 332 */ 333 void 334 fdattach(device_t parent, device_t self, void *aux) 335 { 336 struct fdc_softc *fdc = device_private(parent); 337 struct fd_softc *fd = device_private(self); 338 struct fdc_attach_args *fa = aux; 339 const struct fd_type *type = fa->fa_deftype; 340 int drive = fa->fa_drive; 341 342 fd->sc_dev = self; 343 344 callout_init(&fd->sc_motoron_ch, 0); 345 callout_init(&fd->sc_motoroff_ch, 0); 346 347 /* XXX Allow `flags' to override device type? */ 348 349 if (type) 350 printf(": %s, %d cyl, %d head, %d sec\n", type->name, 351 type->cyls, type->heads, type->sectrac); 352 else 353 printf(": density unknown\n"); 354 355 bufq_alloc(&fd->sc_q, "disksort", BUFQ_SORT_CYLINDER); 356 fd->sc_cylin = -1; 357 fd->sc_drive = drive; 358 fd->sc_deftype = type; 359 fdc->sc_fd[drive] = fd; 360 361 /* 362 * Initialize and attach the disk structure. 363 */ 364 disk_init(&fd->sc_dk, device_xname(fd->sc_dev), &fddkdriver); 365 disk_attach(&fd->sc_dk); 366 367 /* Establish a mountroot hook. */ 368 mountroothook_establish(fd_mountroot_hook, fd->sc_dev); 369 370 /* Needed to power off if the motor is on when we halt. */ 371 if (!pmf_device_register1(self, NULL, NULL, fd_shutdown)) 372 aprint_error_dev(self, "couldn't establish power handler\n"); 373 } 374 375 bool 376 fd_shutdown(device_t self, int howto) 377 { 378 struct fd_softc *fd; 379 380 fd = device_private(self); 381 fd_motor_off(fd); 382 383 return true; 384 } 385 386 #if 0 387 /* 388 * Translate nvram type into internal data structure. Return NULL for 389 * none/unknown/unusable. 390 */ 391 static const struct fd_type * 392 fd_nvtotype(char *fdc, int nvraminfo, int drive) 393 { 394 int type; 395 396 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0; 397 #if 0 398 switch (type) { 399 case NVRAM_DISKETTE_NONE: 400 return NULL; 401 case NVRAM_DISKETTE_12M: 402 return &fd_types[1]; 403 case NVRAM_DISKETTE_TYPE5: 404 case NVRAM_DISKETTE_TYPE6: 405 /* XXX We really ought to handle 2.88MB format. */ 406 case NVRAM_DISKETTE_144M: 407 return &fd_types[0]; 408 case NVRAM_DISKETTE_360K: 409 return &fd_types[3]; 410 case NVRAM_DISKETTE_720K: 411 return &fd_types[4]; 412 default: 413 printf("%s: drive %d: unknown device type 0x%x\n", 414 fdc, drive, type); 415 return NULL; 416 } 417 #else 418 return &fd_types[0]; /* Use only 1.44 for now */ 419 #endif 420 } 421 #endif 422 423 static const struct fd_type * 424 fd_dev_to_type(struct fd_softc *fd, dev_t dev) 425 { 426 int type = FDTYPE(dev); 427 428 if (type > __arraycount(fd_types)) 429 return NULL; 430 return type ? &fd_types[type - 1] : fd->sc_deftype; 431 } 432 433 void 434 fdstrategy(struct buf *bp) 435 { 436 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(bp->b_dev)); 437 int sz; 438 int s; 439 440 /* Valid unit, controller, and request? */ 441 if (bp->b_blkno < 0 || 442 (bp->b_bcount % FDC_BSIZE) != 0) { 443 bp->b_error = EINVAL; 444 goto done; 445 } 446 447 /* If it's a null transfer, return immediately. */ 448 if (bp->b_bcount == 0) 449 goto done; 450 451 sz = howmany(bp->b_bcount, FDC_BSIZE); 452 453 if (bp->b_blkno + sz > fd->sc_type->size) { 454 sz = fd->sc_type->size - bp->b_blkno; 455 if (sz == 0) { 456 /* If exactly at end of disk, return EOF. */ 457 goto done; 458 } 459 if (sz < 0) { 460 /* If past end of disk, return EINVAL. */ 461 bp->b_error = EINVAL; 462 goto done; 463 } 464 /* Otherwise, truncate request. */ 465 bp->b_bcount = sz << DEV_BSHIFT; 466 } 467 468 bp->b_rawblkno = bp->b_blkno; 469 bp->b_cylinder = 470 bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 471 472 #ifdef FD_DEBUG 473 printf("%s: b_blkno %" PRId64 " b_bcount %ld blkno %" PRId64 474 " cylin %ld sz %d\n", __func__, 475 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylinder, sz); 476 #endif 477 478 /* Queue transfer on drive, activate drive and controller if idle. */ 479 s = splbio(); 480 bufq_put(fd->sc_q, bp); 481 callout_stop(&fd->sc_motoroff_ch); /* a good idea */ 482 if (fd->sc_active == 0) 483 fdstart(fd); 484 #ifdef DIAGNOSTIC 485 else { 486 struct fdc_softc *fdc = 487 device_private(device_parent(fd->sc_dev)); 488 if (fdc->sc_state == DEVIDLE) { 489 printf("%s: controller inactive\n", __func__); 490 fdcstart(fdc); 491 } 492 } 493 #endif 494 splx(s); 495 return; 496 497 done: 498 /* Toss transfer; we're done early. */ 499 bp->b_resid = bp->b_bcount; 500 biodone(bp); 501 } 502 503 void 504 fdstart(struct fd_softc *fd) 505 { 506 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 507 int active = TAILQ_FIRST(&fdc->sc_drives) != 0; 508 509 /* Link into controller queue. */ 510 fd->sc_active = 1; 511 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 512 513 /* If controller not already active, start it. */ 514 if (!active) 515 fdcstart(fdc); 516 } 517 518 void 519 fdfinish(struct fd_softc *fd, struct buf *bp) 520 { 521 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 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 (TAILQ_NEXT(fd, sc_drivechain) && ++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_t dev, struct uio *uio, int flags) 548 { 549 550 return physio(fdstrategy, NULL, dev, B_READ, minphys, uio); 551 } 552 553 int 554 fdwrite(dev_t dev, struct uio *uio, int flags) 555 { 556 557 return physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio); 558 } 559 560 void 561 fd_set_motor(struct fdc_softc *fdc, int reset) 562 { 563 struct fd_softc *fd; 564 u_char status; 565 int n; 566 567 if ((fd = TAILQ_FIRST(&fdc->sc_drives)) != NULL) 568 status = fd->sc_drive; 569 else 570 status = 0; 571 if (!reset) 572 status |= FDO_FRST | FDO_FDMAEN; 573 for (n = 0; n < 4; n++) 574 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 575 status |= FDO_MOEN(n); 576 bus_space_write_1(fdc->sc_iot, fdc->sc_ioh, FDOUT, status); 577 } 578 579 void 580 fd_motor_off(void *arg) 581 { 582 struct fd_softc *fd = arg; 583 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 584 int s; 585 586 s = splbio(); 587 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 588 fd_set_motor(fdc, 0); 589 splx(s); 590 } 591 592 void 593 fd_motor_on(void *arg) 594 { 595 struct fd_softc *fd = arg; 596 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 597 int s; 598 599 s = splbio(); 600 fd->sc_flags &= ~FD_MOTOR_WAIT; 601 if ((TAILQ_FIRST(&fdc->sc_drives) == fd) && 602 (fdc->sc_state == MOTORWAIT)) 603 (void)fdcintr(fdc); 604 splx(s); 605 } 606 607 int 608 fdcresult(struct fdc_softc *fdc) 609 { 610 bus_space_tag_t iot = fdc->sc_iot; 611 bus_space_handle_t ioh = fdc->sc_ioh; 612 u_char i; 613 int j, n = 0; 614 615 for (j = 100000; j; j--) { 616 i = bus_space_read_1(iot, ioh, FDSTS) & 617 (NE7_DIO | NE7_RQM | NE7_CB); 618 if (i == NE7_RQM) 619 return n; 620 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 621 if (n >= sizeof(fdc->sc_status)) { 622 log(LOG_ERR, "%s: overrun\n", __func__); 623 return -1; 624 } 625 fdc->sc_status[n++] = 626 bus_space_read_1(iot, ioh, FDDATA); 627 } 628 delay(10); 629 } 630 log(LOG_ERR, "%s: timeout\n", __func__); 631 return -1; 632 } 633 634 int 635 out_fdc(bus_space_tag_t iot, bus_space_handle_t ioh, uint8_t x) 636 { 637 int i = 100000; 638 639 while ((bus_space_read_1(iot, ioh, FDSTS) & NE7_DIO) && i-- > 0); 640 if (i <= 0) 641 return -1; 642 while ((bus_space_read_1(iot, ioh, FDSTS) & NE7_RQM) == 0 && i-- > 0); 643 if (i <= 0) 644 return -1; 645 bus_space_write_1(iot, ioh, FDDATA, x); 646 return 0; 647 } 648 649 int 650 fdopen(dev_t dev, int flags, int mode, struct lwp *l) 651 { 652 struct fd_softc *fd; 653 const struct fd_type *type; 654 655 fd = device_lookup_private(&fd_cd, FDUNIT(dev)); 656 if (fd == NULL) 657 return ENXIO; 658 659 type = fd_dev_to_type(fd, dev); 660 if (type == NULL) 661 return ENXIO; 662 663 if ((fd->sc_flags & FD_OPEN) != 0 && 664 memcmp(fd->sc_type, type, sizeof(*type))) 665 return EBUSY; 666 667 fd->sc_type_copy = *type; 668 fd->sc_type = &fd->sc_type_copy; 669 fd->sc_cylin = -1; 670 fd->sc_flags |= FD_OPEN; 671 672 return 0; 673 } 674 675 int 676 fdclose(dev_t dev, int flags, int mode, struct lwp *l) 677 { 678 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev)); 679 680 fd->sc_flags &= ~FD_OPEN; 681 return 0; 682 } 683 684 void 685 fdcstart(struct fdc_softc *fdc) 686 { 687 688 #ifdef DIAGNOSTIC 689 /* only got here if controller's drive queue was inactive; should 690 be in idle state */ 691 if (fdc->sc_state != DEVIDLE) { 692 printf("%s: not idle\n", __func__); 693 return; 694 } 695 #endif 696 (void)fdcintr(fdc); 697 } 698 699 static void 700 fdcpstatus(int n, struct fdc_softc *fdc) 701 { 702 char bits[64]; 703 704 switch (n) { 705 case 0: 706 printf("\n"); 707 break; 708 case 2: 709 snprintb(bits, sizeof(bits), NE7_ST0BITS, fdc->sc_status[0]); 710 printf(" (st0 %s cyl %d)\n", bits, fdc->sc_status[1]); 711 break; 712 case 7: 713 snprintb(bits, sizeof(bits), NE7_ST0BITS, fdc->sc_status[0]); 714 printf(" (st0 %s", bits); 715 snprintb(bits, sizeof(bits), NE7_ST1BITS, fdc->sc_status[1]); 716 printf(" st1 %s", bits); 717 snprintb(bits, sizeof(bits), NE7_ST2BITS, fdc->sc_status[2]); 718 printf(" st2 %s", bits); 719 printf(" cyl %d head %d sec %d)\n", 720 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 721 break; 722 #ifdef DIAGNOSTIC 723 default: 724 printf("\nfdcstatus: weird size"); 725 break; 726 #endif 727 } 728 } 729 730 void 731 fdcstatus(device_t dev, int n, const char *s) 732 { 733 struct fdc_softc *fdc = device_private(device_parent(dev)); 734 735 if (n == 0) { 736 out_fdc(fdc->sc_iot, fdc->sc_ioh, NE7CMD_SENSEI); 737 (void)fdcresult(fdc); 738 n = 2; 739 } 740 741 printf("%s: %s", device_xname(dev), s); 742 fdcpstatus(n, fdc); 743 } 744 745 void 746 fdctimeout(void *arg) 747 { 748 struct fdc_softc *fdc = arg; 749 struct fd_softc *fd = TAILQ_FIRST(&fdc->sc_drives); 750 int s; 751 752 s = splbio(); 753 #ifdef DEBUG 754 log(LOG_ERR, "%s: state %d\n", __func__, fdc->sc_state); 755 #endif 756 fdcstatus(fd->sc_dev, 0, "timeout"); 757 758 if (bufq_peek(fd->sc_q) != NULL) 759 fdc->sc_state++; 760 else 761 fdc->sc_state = DEVIDLE; 762 763 (void)fdcintr(fdc); 764 splx(s); 765 } 766 767 void 768 fdcpseudointr(void *arg) 769 { 770 int s; 771 772 /* Just ensure it has the right spl. */ 773 s = splbio(); 774 (void)fdcintr(arg); 775 splx(s); 776 } 777 778 int 779 fdcintr(void *arg) 780 { 781 struct fdc_softc *fdc = arg; 782 #define st0 fdc->sc_status[0] 783 #define cyl fdc->sc_status[1] 784 struct fd_softc *fd; 785 struct buf *bp; 786 bus_space_tag_t iot = fdc->sc_iot; 787 bus_space_handle_t ioh = fdc->sc_ioh; 788 int read, head, sec, i, nblks; 789 struct fd_type *type; 790 791 loop: 792 /* Is there a drive for the controller to do a transfer with? */ 793 fd = TAILQ_FIRST(&fdc->sc_drives); 794 if (fd == NULL) { 795 fdc->sc_state = DEVIDLE; 796 return 1; 797 } 798 799 /* Is there a transfer to this drive? If not, deactivate drive. */ 800 bp = bufq_peek(fd->sc_q); 801 if (bp == NULL) { 802 fd->sc_ops = 0; 803 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 804 fd->sc_active = 0; 805 goto loop; 806 } 807 808 switch (fdc->sc_state) { 809 case DEVIDLE: 810 fdc->sc_errors = 0; 811 fd->sc_skip = 0; 812 fd->sc_bcount = bp->b_bcount; 813 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 814 callout_stop(&fd->sc_motoroff_ch); 815 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 816 fdc->sc_state = MOTORWAIT; 817 return 1; 818 } 819 if ((fd->sc_flags & FD_MOTOR) == 0) { 820 /* Turn on the motor, being careful about pairing. */ 821 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 822 if (ofd && ofd->sc_flags & FD_MOTOR) { 823 callout_stop(&ofd->sc_motoroff_ch); 824 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 825 } 826 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 827 fd_set_motor(fdc, 0); 828 fdc->sc_state = MOTORWAIT; 829 /* Allow .25s for motor to stabilize. */ 830 callout_reset(&fd->sc_motoron_ch, hz / 4, 831 fd_motor_on, fd); 832 return 1; 833 } 834 /* Make sure the right drive is selected. */ 835 fd_set_motor(fdc, 0); 836 837 /* fall through */ 838 case DOSEEK: 839 doseek: 840 if (fd->sc_cylin == bp->b_cylinder) 841 goto doio; 842 843 out_fdc(iot, ioh, NE7CMD_SPECIFY);/* specify command */ 844 out_fdc(iot, ioh, fd->sc_type->steprate); 845 out_fdc(iot, ioh, 6); /* XXX head load time == 6ms */ 846 847 out_fdc(iot, ioh, NE7CMD_SEEK); /* seek function */ 848 out_fdc(iot, ioh, fd->sc_drive); /* drive number */ 849 out_fdc(iot, ioh, bp->b_cylinder * fd->sc_type->step); 850 851 fd->sc_cylin = -1; 852 fdc->sc_state = SEEKWAIT; 853 854 iostat_seek(fd->sc_dk.dk_stats); 855 disk_busy(&fd->sc_dk); 856 857 callout_reset(&fdc->sc_timo_ch, 4 * hz, fdctimeout, fdc); 858 return 1; 859 860 case DOIO: 861 doio: 862 type = fd->sc_type; 863 sec = fd->sc_blkno % type->seccyl; 864 nblks = type->seccyl - sec; 865 nblks = uimin(nblks, fd->sc_bcount / FDC_BSIZE); 866 nblks = uimin(nblks, fdc->sc_maxiosize / FDC_BSIZE); 867 fd->sc_nblks = nblks; 868 fd->sc_nbytes = nblks * FDC_BSIZE; 869 head = sec / type->sectrac; 870 sec -= head * type->sectrac; 871 #ifdef DIAGNOSTIC 872 { 873 int block; 874 block = (fd->sc_cylin * type->heads + head) * 875 type->sectrac + sec; 876 if (block != fd->sc_blkno) { 877 printf("%s: block %d != blkno %" PRId64 878 "\n", __func__, block, fd->sc_blkno); 879 #ifdef DDB 880 Debugger(); 881 #endif 882 } 883 } 884 #endif 885 read = (bp->b_flags & B_READ) != 0; 886 FDCDMA_START(fdc, (uint8_t *)bp->b_data + fd->sc_skip, 887 fd->sc_nbytes, read); 888 bus_space_write_1(iot, ioh, FDCTL, type->rate); 889 #ifdef FD_DEBUG 890 printf("%s: %s drive %d track %d head %d sec %d nblks %d\n", 891 __func__, read ? "read" : "write", fd->sc_drive, 892 fd->sc_cylin, head, sec, nblks); 893 #endif 894 if (read) 895 out_fdc(iot, ioh, NE7CMD_READ); /* READ */ 896 else 897 out_fdc(iot, ioh, NE7CMD_WRITE);/* WRITE */ 898 out_fdc(iot, ioh, (head << 2) | fd->sc_drive); 899 out_fdc(iot, ioh, fd->sc_cylin); /* track */ 900 out_fdc(iot, ioh, head); 901 out_fdc(iot, ioh, sec + 1); /* sector + 1 */ 902 out_fdc(iot, ioh, type->secsize); /* sector size */ 903 out_fdc(iot, ioh, type->sectrac); /* sectors/track */ 904 out_fdc(iot, ioh, type->gap1); /* gap1 size */ 905 out_fdc(iot, ioh, type->datalen); /* data length */ 906 fdc->sc_state = IOCOMPLETE; 907 908 disk_busy(&fd->sc_dk); 909 910 /* allow 2 seconds for operation */ 911 callout_reset(&fdc->sc_timo_ch, 2 * hz, fdctimeout, fdc); 912 return 1; /* will return later */ 913 914 case SEEKWAIT: 915 callout_stop(&fdc->sc_timo_ch); 916 fdc->sc_state = SEEKCOMPLETE; 917 /* allow 1/50 second for heads to settle */ 918 callout_reset(&fdc->sc_intr_ch, hz / 50, fdcpseudointr, fdc); 919 return 1; 920 921 case SEEKCOMPLETE: 922 disk_unbusy(&fd->sc_dk, 0, 0); 923 924 /* Make sure seek really happened. */ 925 out_fdc(iot, ioh, NE7CMD_SENSEI); 926 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || 927 cyl != bp->b_cylinder * fd->sc_type->step) { 928 #ifdef FD_DEBUG 929 fdcstatus(fd->sc_dev, 2, "seek failed"); 930 #endif 931 fdcretry(fdc); 932 goto loop; 933 } 934 fd->sc_cylin = bp->b_cylinder; 935 goto doio; 936 937 case IOTIMEDOUT: 938 FDCDMA_ABORT(fdc); 939 940 case SEEKTIMEDOUT: 941 case RECALTIMEDOUT: 942 case RESETTIMEDOUT: 943 fdcretry(fdc); 944 goto loop; 945 946 case IOCOMPLETE: /* IO DONE, post-analyze */ 947 callout_stop(&fdc->sc_timo_ch); 948 949 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid), 950 (bp->b_flags & B_READ)); 951 952 i = fdcresult(fdc); 953 if (i != 7 || (st0 & 0xf8) != 0) { 954 FDCDMA_ABORT(fdc); 955 #ifdef FD_DEBUG 956 fdcstatus(fd->sc_dev, 7, bp->b_flags & B_READ ? 957 "read failed" : "write failed"); 958 printf("blkno %" PRId64 " nblks %d\n", 959 fd->sc_blkno, fd->sc_nblks); 960 #endif 961 fdcretry(fdc); 962 goto loop; 963 } 964 FDCDMA_DONE(fdc); 965 if (fdc->sc_errors) { 966 diskerr(bp, "fd", "soft error (corrected)", LOG_PRINTF, 967 fd->sc_skip / FDC_BSIZE, NULL); 968 printf("\n"); 969 fdc->sc_errors = 0; 970 } 971 fd->sc_blkno += fd->sc_nblks; 972 fd->sc_skip += fd->sc_nbytes; 973 fd->sc_bcount -= fd->sc_nbytes; 974 if (fd->sc_bcount > 0) { 975 bp->b_cylinder = fd->sc_blkno / fd->sc_type->seccyl; 976 goto doseek; 977 } 978 fdfinish(fd, bp); 979 goto loop; 980 981 case DORESET: 982 /* try a reset, keep motor on */ 983 fd_set_motor(fdc, 1); 984 delay(100); 985 fd_set_motor(fdc, 0); 986 fdc->sc_state = RESETCOMPLETE; 987 callout_reset(&fdc->sc_timo_ch, hz / 2, fdctimeout, fdc); 988 return 1; /* will return later */ 989 990 case RESETCOMPLETE: 991 callout_stop(&fdc->sc_timo_ch); 992 /* clear the controller output buffer */ 993 for (i = 0; i < 4; i++) { 994 out_fdc(iot, ioh, NE7CMD_SENSEI); 995 (void)fdcresult(fdc); 996 } 997 998 /* fall through */ 999 case DORECAL: 1000 out_fdc(iot, ioh, NE7CMD_RECAL); /* recalibrate function */ 1001 out_fdc(iot, ioh, fd->sc_drive); 1002 fdc->sc_state = RECALWAIT; 1003 callout_reset(&fdc->sc_timo_ch, 5 * hz, fdctimeout, fdc); 1004 return 1; /* will return later */ 1005 1006 case RECALWAIT: 1007 callout_stop(&fdc->sc_timo_ch); 1008 fdc->sc_state = RECALCOMPLETE; 1009 /* allow 1/30 second for heads to settle */ 1010 callout_reset(&fdc->sc_intr_ch, hz / 30, fdcpseudointr, fdc); 1011 return 1; /* will return later */ 1012 1013 case RECALCOMPLETE: 1014 out_fdc(iot, ioh, NE7CMD_SENSEI); 1015 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1016 #ifdef FD_DEBUG 1017 fdcstatus(fd->sc_dev, 2, "recalibrate failed"); 1018 #endif 1019 fdcretry(fdc); 1020 goto loop; 1021 } 1022 fd->sc_cylin = 0; 1023 goto doseek; 1024 1025 case MOTORWAIT: 1026 if (fd->sc_flags & FD_MOTOR_WAIT) 1027 return 1; /* time's not up yet */ 1028 goto doseek; 1029 1030 default: 1031 fdcstatus(fd->sc_dev, 0, "stray interrupt"); 1032 return 1; 1033 } 1034 #ifdef DIAGNOSTIC 1035 panic("%s: impossible", __func__); 1036 #endif 1037 #undef st0 1038 #undef cyl 1039 } 1040 1041 void 1042 fdcretry(struct fdc_softc *fdc) 1043 { 1044 struct fd_softc *fd; 1045 struct buf *bp; 1046 1047 fd = TAILQ_FIRST(&fdc->sc_drives); 1048 bp = bufq_peek(fd->sc_q); 1049 1050 switch (fdc->sc_errors) { 1051 case 0: 1052 /* try again */ 1053 fdc->sc_state = DOSEEK; 1054 break; 1055 1056 case 1: 1057 case 2: 1058 case 3: 1059 /* didn't work; try recalibrating */ 1060 fdc->sc_state = DORECAL; 1061 break; 1062 1063 case 4: 1064 /* still no go; reset the bastard */ 1065 fdc->sc_state = DORESET; 1066 break; 1067 1068 default: 1069 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1070 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1071 1072 fdcpstatus(7, fdc); 1073 bp->b_error = EIO; 1074 fdfinish(fd, bp); 1075 } 1076 fdc->sc_errors++; 1077 } 1078 1079 int 1080 fdioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 1081 { 1082 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev)); 1083 struct disklabel buffer; 1084 int error; 1085 1086 switch (cmd) { 1087 case DIOCGDINFO: 1088 memset(&buffer, 0, sizeof(buffer)); 1089 1090 buffer.d_secpercyl = fd->sc_type->seccyl; 1091 buffer.d_type = DKTYPE_FLOPPY; 1092 buffer.d_secsize = FDC_BSIZE; 1093 1094 if (readdisklabel(dev, fdstrategy, &buffer, NULL) != NULL) 1095 return EINVAL; 1096 1097 *(struct disklabel *)addr = buffer; 1098 return 0; 1099 1100 case DIOCWLABEL: 1101 if ((flag & FWRITE) == 0) 1102 return EBADF; 1103 /* XXX do something */ 1104 return 0; 1105 1106 case DIOCWDINFO: 1107 if ((flag & FWRITE) == 0) 1108 return EBADF; 1109 1110 error = setdisklabel(&buffer, (struct disklabel *)addr, 1111 0, NULL); 1112 if (error) 1113 return error; 1114 1115 error = writedisklabel(dev, fdstrategy, &buffer, NULL); 1116 return error; 1117 1118 default: 1119 return ENOTTY; 1120 } 1121 1122 #ifdef DIAGNOSTIC 1123 panic("%s: impossible", __func__); 1124 #endif 1125 } 1126 1127 /* 1128 * Mountroot hook: prompt the user to enter the root file system floppy. 1129 */ 1130 void 1131 fd_mountroot_hook(device_t dev) 1132 { 1133 int c; 1134 1135 printf("Insert filesystem floppy and press return."); 1136 cnpollc(1); 1137 for (;;) { 1138 c = cngetc(); 1139 if ((c == '\r') || (c == '\n')) { 1140 printf("\n"); 1141 break; 1142 } 1143 } 1144 cnpollc(0); 1145 } 1146