1 /* $NetBSD: fd.c,v 1.43 2014/03/16 05:20:22 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 1.43 2014/03/16 05:20:22 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_flag = D_DISK 197 }; 198 199 const struct cdevsw fd_cdevsw = { 200 .d_open = fdopen, 201 .d_close = fdclose, 202 .d_read = fdread, 203 .d_write = fdwrite, 204 .d_ioctl = fdioctl, 205 .d_stop = nostop, 206 .d_tty = notty, 207 .d_poll = nopoll, 208 .d_mmap = nommap, 209 .d_kqfilter = nokqfilter, 210 .d_flag = D_DISK 211 }; 212 213 static void fdstart(struct fd_softc *); 214 215 struct dkdriver fddkdriver = { fdstrategy }; 216 217 static bool fd_shutdown(device_t, int); 218 #if 0 219 static const struct fd_type *fd_nvtotype(char *, int, int); 220 #endif 221 static void fd_set_motor(struct fdc_softc *, int); 222 static void fd_motor_off(void *); 223 static void fd_motor_on(void *); 224 static int fdcresult(struct fdc_softc *); 225 static void fdcstart(struct fdc_softc *); 226 static void fdcstatus(device_t, int, const char *); 227 static void fdctimeout(void *); 228 static void fdcpseudointr(void *); 229 static void fdcretry(struct fdc_softc *); 230 static void fdfinish(struct fd_softc *, struct buf *); 231 static inline const struct fd_type *fd_dev_to_type(struct fd_softc *, dev_t); 232 static void fd_mountroot_hook(device_t); 233 234 /* 235 * Arguments passed between fdcattach and fdprobe. 236 */ 237 struct fdc_attach_args { 238 int fa_drive; 239 const struct fd_type *fa_deftype; 240 }; 241 242 /* 243 * Print the location of a disk drive (called just before attaching the 244 * the drive). If `fdc' is not NULL, the drive was found but was not 245 * in the system config file; print the drive name as well. 246 * Return QUIET (config_find ignores this if the device was configured) to 247 * avoid printing `fdN not configured' messages. 248 */ 249 static int 250 fdprint(void *aux, const char *fdc) 251 { 252 struct fdc_attach_args *fa = aux; 253 254 if (fdc == NULL) 255 aprint_normal(" drive %d", fa->fa_drive); 256 return QUIET; 257 } 258 259 void 260 fdcattach(struct fdc_softc *fdc) 261 { 262 struct fdc_attach_args fa; 263 int type; 264 265 callout_init(&fdc->sc_timo_ch, 0); 266 callout_init(&fdc->sc_intr_ch, 0); 267 268 fdc->sc_state = DEVIDLE; 269 TAILQ_INIT(&fdc->sc_drives); 270 271 /* 272 * No way yet to determine default disk types. 273 * we assume 1.44 3.5" type for the moment. 274 */ 275 type = 0; 276 277 /* physical limit: two drives per controller. */ 278 for (fa.fa_drive = 0; fa.fa_drive < 2; fa.fa_drive++) { 279 fa.fa_deftype = &fd_types[type]; 280 (void)config_found(fdc->sc_dev, (void *)&fa, fdprint); 281 } 282 } 283 284 static int 285 fdprobe(device_t parent, cfdata_t cf , void *aux) 286 { 287 struct fdc_softc *fdc = device_private(parent); 288 struct fdc_attach_args *fa = aux; 289 int drive = fa->fa_drive; 290 bus_space_tag_t iot = fdc->sc_iot; 291 bus_space_handle_t ioh = fdc->sc_ioh; 292 int n; 293 294 if (cf->cf_loc[FDCCF_DRIVE] != FDCCF_DRIVE_DEFAULT && 295 cf->cf_loc[FDCCF_DRIVE] != drive) 296 return 0; 297 298 /* select drive and turn on motor */ 299 bus_space_write_1(iot, ioh, FDOUT, drive | FDO_FRST | FDO_MOEN(drive)); 300 /* wait for motor to spin up */ 301 delay(250000); 302 out_fdc(iot, ioh, NE7CMD_RECAL); 303 out_fdc(iot, ioh, drive); 304 /* wait for recalibrate */ 305 delay(2000000); 306 out_fdc(iot, ioh, NE7CMD_SENSEI); 307 n = fdcresult(fdc); 308 #ifdef FD_DEBUG 309 { 310 int i; 311 aprint_debug("%s: status", __func__); 312 for (i = 0; i < n; i++) 313 aprint_debug(" %x", fdc->sc_status[i]); 314 aprint_debug("\n"); 315 } 316 #endif 317 if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20) 318 return 0; 319 /* turn off motor */ 320 bus_space_write_1(iot, ioh, FDOUT, FDO_FRST); 321 322 return 1; 323 } 324 325 /* 326 * Controller is working, and drive responded. Attach it. 327 */ 328 void 329 fdattach(device_t parent, device_t self, void *aux) 330 { 331 struct fdc_softc *fdc = device_private(parent); 332 struct fd_softc *fd = device_private(self); 333 struct fdc_attach_args *fa = aux; 334 const struct fd_type *type = fa->fa_deftype; 335 int drive = fa->fa_drive; 336 337 fd->sc_dev = self; 338 339 callout_init(&fd->sc_motoron_ch, 0); 340 callout_init(&fd->sc_motoroff_ch, 0); 341 342 /* XXX Allow `flags' to override device type? */ 343 344 if (type) 345 printf(": %s, %d cyl, %d head, %d sec\n", type->name, 346 type->cyls, type->heads, type->sectrac); 347 else 348 printf(": density unknown\n"); 349 350 bufq_alloc(&fd->sc_q, "disksort", BUFQ_SORT_CYLINDER); 351 fd->sc_cylin = -1; 352 fd->sc_drive = drive; 353 fd->sc_deftype = type; 354 fdc->sc_fd[drive] = fd; 355 356 /* 357 * Initialize and attach the disk structure. 358 */ 359 disk_init(&fd->sc_dk, device_xname(fd->sc_dev), &fddkdriver); 360 disk_attach(&fd->sc_dk); 361 362 /* Establish a mountroot hook. */ 363 mountroothook_establish(fd_mountroot_hook, fd->sc_dev); 364 365 /* Needed to power off if the motor is on when we halt. */ 366 if (!pmf_device_register1(self, NULL, NULL, fd_shutdown)) 367 aprint_error_dev(self, "couldn't establish power handler\n"); 368 } 369 370 bool 371 fd_shutdown(device_t self, int howto) 372 { 373 struct fd_softc *fd; 374 375 fd = device_private(self); 376 fd_motor_off(fd); 377 378 return true; 379 } 380 381 #if 0 382 /* 383 * Translate nvram type into internal data structure. Return NULL for 384 * none/unknown/unusable. 385 */ 386 static const struct fd_type * 387 fd_nvtotype(char *fdc, int nvraminfo, int drive) 388 { 389 int type; 390 391 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0; 392 #if 0 393 switch (type) { 394 case NVRAM_DISKETTE_NONE: 395 return NULL; 396 case NVRAM_DISKETTE_12M: 397 return &fd_types[1]; 398 case NVRAM_DISKETTE_TYPE5: 399 case NVRAM_DISKETTE_TYPE6: 400 /* XXX We really ought to handle 2.88MB format. */ 401 case NVRAM_DISKETTE_144M: 402 return &fd_types[0]; 403 case NVRAM_DISKETTE_360K: 404 return &fd_types[3]; 405 case NVRAM_DISKETTE_720K: 406 return &fd_types[4]; 407 default: 408 printf("%s: drive %d: unknown device type 0x%x\n", 409 fdc, drive, type); 410 return NULL; 411 } 412 #else 413 return &fd_types[0]; /* Use only 1.44 for now */ 414 #endif 415 } 416 #endif 417 418 static inline const struct fd_type * 419 fd_dev_to_type(struct fd_softc *fd, dev_t dev) 420 { 421 int type = FDTYPE(dev); 422 423 if (type > __arraycount(fd_types)) 424 return NULL; 425 return type ? &fd_types[type - 1] : fd->sc_deftype; 426 } 427 428 void 429 fdstrategy(struct buf *bp) 430 { 431 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(bp->b_dev)); 432 int sz; 433 int s; 434 435 /* Valid unit, controller, and request? */ 436 if (bp->b_blkno < 0 || 437 (bp->b_bcount % FDC_BSIZE) != 0) { 438 bp->b_error = EINVAL; 439 goto done; 440 } 441 442 /* If it's a null transfer, return immediately. */ 443 if (bp->b_bcount == 0) 444 goto done; 445 446 sz = howmany(bp->b_bcount, FDC_BSIZE); 447 448 if (bp->b_blkno + sz > fd->sc_type->size) { 449 sz = fd->sc_type->size - bp->b_blkno; 450 if (sz == 0) { 451 /* If exactly at end of disk, return EOF. */ 452 goto done; 453 } 454 if (sz < 0) { 455 /* If past end of disk, return EINVAL. */ 456 bp->b_error = EINVAL; 457 goto done; 458 } 459 /* Otherwise, truncate request. */ 460 bp->b_bcount = sz << DEV_BSHIFT; 461 } 462 463 bp->b_rawblkno = bp->b_blkno; 464 bp->b_cylinder = 465 bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 466 467 #ifdef FD_DEBUG 468 printf("%s: b_blkno %" PRId64 " b_bcount %ld blkno %" PRId64 469 " cylin %ld sz %d\n", __func__, 470 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylinder, sz); 471 #endif 472 473 /* Queue transfer on drive, activate drive and controller if idle. */ 474 s = splbio(); 475 bufq_put(fd->sc_q, bp); 476 callout_stop(&fd->sc_motoroff_ch); /* a good idea */ 477 if (fd->sc_active == 0) 478 fdstart(fd); 479 #ifdef DIAGNOSTIC 480 else { 481 struct fdc_softc *fdc = 482 device_private(device_parent(fd->sc_dev)); 483 if (fdc->sc_state == DEVIDLE) { 484 printf("%s: controller inactive\n", __func__); 485 fdcstart(fdc); 486 } 487 } 488 #endif 489 splx(s); 490 return; 491 492 done: 493 /* Toss transfer; we're done early. */ 494 bp->b_resid = bp->b_bcount; 495 biodone(bp); 496 } 497 498 void 499 fdstart(struct fd_softc *fd) 500 { 501 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 502 int active = TAILQ_FIRST(&fdc->sc_drives) != 0; 503 504 /* Link into controller queue. */ 505 fd->sc_active = 1; 506 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 507 508 /* If controller not already active, start it. */ 509 if (!active) 510 fdcstart(fdc); 511 } 512 513 void 514 fdfinish(struct fd_softc *fd, struct buf *bp) 515 { 516 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 517 518 /* 519 * Move this drive to the end of the queue to give others a `fair' 520 * chance. We only force a switch if N operations are completed while 521 * another drive is waiting to be serviced, since there is a long motor 522 * startup delay whenever we switch. 523 */ 524 (void)bufq_get(fd->sc_q); 525 if (TAILQ_NEXT(fd, sc_drivechain) && ++fd->sc_ops >= 8) { 526 fd->sc_ops = 0; 527 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 528 if (bufq_peek(fd->sc_q) != NULL) 529 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 530 else 531 fd->sc_active = 0; 532 } 533 bp->b_resid = fd->sc_bcount; 534 fd->sc_skip = 0; 535 biodone(bp); 536 /* turn off motor 5s from now */ 537 callout_reset(&fd->sc_motoroff_ch, 5 * hz, fd_motor_off, fd); 538 fdc->sc_state = DEVIDLE; 539 } 540 541 int 542 fdread(dev_t dev, struct uio *uio, int flags) 543 { 544 545 return physio(fdstrategy, NULL, dev, B_READ, minphys, uio); 546 } 547 548 int 549 fdwrite(dev_t dev, struct uio *uio, int flags) 550 { 551 552 return physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio); 553 } 554 555 void 556 fd_set_motor(struct fdc_softc *fdc, int reset) 557 { 558 struct fd_softc *fd; 559 u_char status; 560 int n; 561 562 if ((fd = TAILQ_FIRST(&fdc->sc_drives)) != NULL) 563 status = fd->sc_drive; 564 else 565 status = 0; 566 if (!reset) 567 status |= FDO_FRST | FDO_FDMAEN; 568 for (n = 0; n < 4; n++) 569 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 570 status |= FDO_MOEN(n); 571 bus_space_write_1(fdc->sc_iot, fdc->sc_ioh, FDOUT, status); 572 } 573 574 void 575 fd_motor_off(void *arg) 576 { 577 struct fd_softc *fd = arg; 578 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 579 int s; 580 581 s = splbio(); 582 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 583 fd_set_motor(fdc, 0); 584 splx(s); 585 } 586 587 void 588 fd_motor_on(void *arg) 589 { 590 struct fd_softc *fd = arg; 591 struct fdc_softc *fdc = device_private(device_parent(fd->sc_dev)); 592 int s; 593 594 s = splbio(); 595 fd->sc_flags &= ~FD_MOTOR_WAIT; 596 if ((TAILQ_FIRST(&fdc->sc_drives) == fd) && 597 (fdc->sc_state == MOTORWAIT)) 598 (void)fdcintr(fdc); 599 splx(s); 600 } 601 602 int 603 fdcresult(struct fdc_softc *fdc) 604 { 605 bus_space_tag_t iot = fdc->sc_iot; 606 bus_space_handle_t ioh = fdc->sc_ioh; 607 u_char i; 608 int j, n = 0; 609 610 for (j = 100000; j; j--) { 611 i = bus_space_read_1(iot, ioh, FDSTS) & 612 (NE7_DIO | NE7_RQM | NE7_CB); 613 if (i == NE7_RQM) 614 return n; 615 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 616 if (n >= sizeof(fdc->sc_status)) { 617 log(LOG_ERR, "%s: overrun\n", __func__); 618 return -1; 619 } 620 fdc->sc_status[n++] = 621 bus_space_read_1(iot, ioh, FDDATA); 622 } 623 delay(10); 624 } 625 log(LOG_ERR, "%s: timeout\n", __func__); 626 return -1; 627 } 628 629 int 630 out_fdc(bus_space_tag_t iot, bus_space_handle_t ioh, uint8_t x) 631 { 632 int i = 100000; 633 634 while ((bus_space_read_1(iot, ioh, FDSTS) & NE7_DIO) && i-- > 0); 635 if (i <= 0) 636 return -1; 637 while ((bus_space_read_1(iot, ioh, FDSTS) & NE7_RQM) == 0 && i-- > 0); 638 if (i <= 0) 639 return -1; 640 bus_space_write_1(iot, ioh, FDDATA, x); 641 return 0; 642 } 643 644 int 645 fdopen(dev_t dev, int flags, int mode, struct lwp *l) 646 { 647 struct fd_softc *fd; 648 const struct fd_type *type; 649 650 fd = device_lookup_private(&fd_cd, FDUNIT(dev)); 651 if (fd == NULL) 652 return ENXIO; 653 654 type = fd_dev_to_type(fd, dev); 655 if (type == NULL) 656 return ENXIO; 657 658 if ((fd->sc_flags & FD_OPEN) != 0 && 659 memcmp(fd->sc_type, type, sizeof(*type))) 660 return EBUSY; 661 662 fd->sc_type_copy = *type; 663 fd->sc_type = &fd->sc_type_copy; 664 fd->sc_cylin = -1; 665 fd->sc_flags |= FD_OPEN; 666 667 return 0; 668 } 669 670 int 671 fdclose(dev_t dev, int flags, int mode, struct lwp *l) 672 { 673 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev)); 674 675 fd->sc_flags &= ~FD_OPEN; 676 return 0; 677 } 678 679 void 680 fdcstart(struct fdc_softc *fdc) 681 { 682 683 #ifdef DIAGNOSTIC 684 /* only got here if controller's drive queue was inactive; should 685 be in idle state */ 686 if (fdc->sc_state != DEVIDLE) { 687 printf("%s: not idle\n", __func__); 688 return; 689 } 690 #endif 691 (void)fdcintr(fdc); 692 } 693 694 static void 695 fdcpstatus(int n, struct fdc_softc *fdc) 696 { 697 char bits[64]; 698 699 switch (n) { 700 case 0: 701 printf("\n"); 702 break; 703 case 2: 704 snprintb(bits, sizeof(bits), NE7_ST0BITS, fdc->sc_status[0]); 705 printf(" (st0 %s cyl %d)\n", bits, fdc->sc_status[1]); 706 break; 707 case 7: 708 snprintb(bits, sizeof(bits), NE7_ST0BITS, fdc->sc_status[0]); 709 printf(" (st0 %s", bits); 710 snprintb(bits, sizeof(bits), NE7_ST1BITS, fdc->sc_status[1]); 711 printf(" st1 %s", bits); 712 snprintb(bits, sizeof(bits), NE7_ST2BITS, fdc->sc_status[2]); 713 printf(" st2 %s", bits); 714 printf(" cyl %d head %d sec %d)\n", 715 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 716 break; 717 #ifdef DIAGNOSTIC 718 default: 719 printf("\nfdcstatus: weird size"); 720 break; 721 #endif 722 } 723 } 724 725 void 726 fdcstatus(device_t dev, int n, const char *s) 727 { 728 struct fdc_softc *fdc = device_private(device_parent(dev)); 729 730 if (n == 0) { 731 out_fdc(fdc->sc_iot, fdc->sc_ioh, NE7CMD_SENSEI); 732 (void)fdcresult(fdc); 733 n = 2; 734 } 735 736 printf("%s: %s", device_xname(dev), s); 737 fdcpstatus(n, fdc); 738 } 739 740 void 741 fdctimeout(void *arg) 742 { 743 struct fdc_softc *fdc = arg; 744 struct fd_softc *fd = TAILQ_FIRST(&fdc->sc_drives); 745 int s; 746 747 s = splbio(); 748 #ifdef DEBUG 749 log(LOG_ERR, "%s: state %d\n", __func__, fdc->sc_state); 750 #endif 751 fdcstatus(fd->sc_dev, 0, "timeout"); 752 753 if (bufq_peek(fd->sc_q) != NULL) 754 fdc->sc_state++; 755 else 756 fdc->sc_state = DEVIDLE; 757 758 (void)fdcintr(fdc); 759 splx(s); 760 } 761 762 void 763 fdcpseudointr(void *arg) 764 { 765 int s; 766 767 /* Just ensure it has the right spl. */ 768 s = splbio(); 769 (void)fdcintr(arg); 770 splx(s); 771 } 772 773 int 774 fdcintr(void *arg) 775 { 776 struct fdc_softc *fdc = arg; 777 #define st0 fdc->sc_status[0] 778 #define cyl fdc->sc_status[1] 779 struct fd_softc *fd; 780 struct buf *bp; 781 bus_space_tag_t iot = fdc->sc_iot; 782 bus_space_handle_t ioh = fdc->sc_ioh; 783 int read, head, sec, i, nblks; 784 struct fd_type *type; 785 786 loop: 787 /* Is there a drive for the controller to do a transfer with? */ 788 fd = TAILQ_FIRST(&fdc->sc_drives); 789 if (fd == NULL) { 790 fdc->sc_state = DEVIDLE; 791 return 1; 792 } 793 794 /* Is there a transfer to this drive? If not, deactivate drive. */ 795 bp = bufq_peek(fd->sc_q); 796 if (bp == NULL) { 797 fd->sc_ops = 0; 798 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 799 fd->sc_active = 0; 800 goto loop; 801 } 802 803 switch (fdc->sc_state) { 804 case DEVIDLE: 805 fdc->sc_errors = 0; 806 fd->sc_skip = 0; 807 fd->sc_bcount = bp->b_bcount; 808 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 809 callout_stop(&fd->sc_motoroff_ch); 810 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 811 fdc->sc_state = MOTORWAIT; 812 return 1; 813 } 814 if ((fd->sc_flags & FD_MOTOR) == 0) { 815 /* Turn on the motor, being careful about pairing. */ 816 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 817 if (ofd && ofd->sc_flags & FD_MOTOR) { 818 callout_stop(&ofd->sc_motoroff_ch); 819 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 820 } 821 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 822 fd_set_motor(fdc, 0); 823 fdc->sc_state = MOTORWAIT; 824 /* Allow .25s for motor to stabilize. */ 825 callout_reset(&fd->sc_motoron_ch, hz / 4, 826 fd_motor_on, fd); 827 return 1; 828 } 829 /* Make sure the right drive is selected. */ 830 fd_set_motor(fdc, 0); 831 832 /* fall through */ 833 case DOSEEK: 834 doseek: 835 if (fd->sc_cylin == bp->b_cylinder) 836 goto doio; 837 838 out_fdc(iot, ioh, NE7CMD_SPECIFY);/* specify command */ 839 out_fdc(iot, ioh, fd->sc_type->steprate); 840 out_fdc(iot, ioh, 6); /* XXX head load time == 6ms */ 841 842 out_fdc(iot, ioh, NE7CMD_SEEK); /* seek function */ 843 out_fdc(iot, ioh, fd->sc_drive); /* drive number */ 844 out_fdc(iot, ioh, bp->b_cylinder * fd->sc_type->step); 845 846 fd->sc_cylin = -1; 847 fdc->sc_state = SEEKWAIT; 848 849 iostat_seek(fd->sc_dk.dk_stats); 850 disk_busy(&fd->sc_dk); 851 852 callout_reset(&fdc->sc_timo_ch, 4 * hz, fdctimeout, fdc); 853 return 1; 854 855 case DOIO: 856 doio: 857 type = fd->sc_type; 858 sec = fd->sc_blkno % type->seccyl; 859 nblks = type->seccyl - sec; 860 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 861 nblks = min(nblks, fdc->sc_maxiosize / FDC_BSIZE); 862 fd->sc_nblks = nblks; 863 fd->sc_nbytes = nblks * FDC_BSIZE; 864 head = sec / type->sectrac; 865 sec -= head * type->sectrac; 866 #ifdef DIAGNOSTIC 867 { 868 int block; 869 block = (fd->sc_cylin * type->heads + head) * 870 type->sectrac + sec; 871 if (block != fd->sc_blkno) { 872 printf("%s: block %d != blkno %" PRId64 873 "\n", __func__, block, fd->sc_blkno); 874 #ifdef DDB 875 Debugger(); 876 #endif 877 } 878 } 879 #endif 880 read = (bp->b_flags & B_READ) != 0; 881 FDCDMA_START(fdc, (uint8_t *)bp->b_data + fd->sc_skip, 882 fd->sc_nbytes, read); 883 bus_space_write_1(iot, ioh, FDCTL, type->rate); 884 #ifdef FD_DEBUG 885 printf("%s: %s drive %d track %d head %d sec %d nblks %d\n", 886 __func__, read ? "read" : "write", fd->sc_drive, 887 fd->sc_cylin, head, sec, nblks); 888 #endif 889 if (read) 890 out_fdc(iot, ioh, NE7CMD_READ); /* READ */ 891 else 892 out_fdc(iot, ioh, NE7CMD_WRITE);/* WRITE */ 893 out_fdc(iot, ioh, (head << 2) | fd->sc_drive); 894 out_fdc(iot, ioh, fd->sc_cylin); /* track */ 895 out_fdc(iot, ioh, head); 896 out_fdc(iot, ioh, sec + 1); /* sector + 1 */ 897 out_fdc(iot, ioh, type->secsize); /* sector size */ 898 out_fdc(iot, ioh, type->sectrac); /* sectors/track */ 899 out_fdc(iot, ioh, type->gap1); /* gap1 size */ 900 out_fdc(iot, ioh, type->datalen); /* data length */ 901 fdc->sc_state = IOCOMPLETE; 902 903 disk_busy(&fd->sc_dk); 904 905 /* allow 2 seconds for operation */ 906 callout_reset(&fdc->sc_timo_ch, 2 * hz, fdctimeout, fdc); 907 return 1; /* will return later */ 908 909 case SEEKWAIT: 910 callout_stop(&fdc->sc_timo_ch); 911 fdc->sc_state = SEEKCOMPLETE; 912 /* allow 1/50 second for heads to settle */ 913 callout_reset(&fdc->sc_intr_ch, hz / 50, fdcpseudointr, fdc); 914 return 1; 915 916 case SEEKCOMPLETE: 917 disk_unbusy(&fd->sc_dk, 0, 0); 918 919 /* Make sure seek really happened. */ 920 out_fdc(iot, ioh, NE7CMD_SENSEI); 921 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || 922 cyl != bp->b_cylinder * fd->sc_type->step) { 923 #ifdef FD_DEBUG 924 fdcstatus(fd->sc_dev, 2, "seek failed"); 925 #endif 926 fdcretry(fdc); 927 goto loop; 928 } 929 fd->sc_cylin = bp->b_cylinder; 930 goto doio; 931 932 case IOTIMEDOUT: 933 FDCDMA_ABORT(fdc); 934 935 case SEEKTIMEDOUT: 936 case RECALTIMEDOUT: 937 case RESETTIMEDOUT: 938 fdcretry(fdc); 939 goto loop; 940 941 case IOCOMPLETE: /* IO DONE, post-analyze */ 942 callout_stop(&fdc->sc_timo_ch); 943 944 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid), 945 (bp->b_flags & B_READ)); 946 947 i = fdcresult(fdc); 948 if (i != 7 || (st0 & 0xf8) != 0) { 949 FDCDMA_ABORT(fdc); 950 #ifdef FD_DEBUG 951 fdcstatus(fd->sc_dev, 7, bp->b_flags & B_READ ? 952 "read failed" : "write failed"); 953 printf("blkno %" PRId64 " nblks %d\n", 954 fd->sc_blkno, fd->sc_nblks); 955 #endif 956 fdcretry(fdc); 957 goto loop; 958 } 959 FDCDMA_DONE(fdc); 960 if (fdc->sc_errors) { 961 diskerr(bp, "fd", "soft error (corrected)", LOG_PRINTF, 962 fd->sc_skip / FDC_BSIZE, NULL); 963 printf("\n"); 964 fdc->sc_errors = 0; 965 } 966 fd->sc_blkno += fd->sc_nblks; 967 fd->sc_skip += fd->sc_nbytes; 968 fd->sc_bcount -= fd->sc_nbytes; 969 if (fd->sc_bcount > 0) { 970 bp->b_cylinder = fd->sc_blkno / fd->sc_type->seccyl; 971 goto doseek; 972 } 973 fdfinish(fd, bp); 974 goto loop; 975 976 case DORESET: 977 /* try a reset, keep motor on */ 978 fd_set_motor(fdc, 1); 979 delay(100); 980 fd_set_motor(fdc, 0); 981 fdc->sc_state = RESETCOMPLETE; 982 callout_reset(&fdc->sc_timo_ch, hz / 2, fdctimeout, fdc); 983 return 1; /* will return later */ 984 985 case RESETCOMPLETE: 986 callout_stop(&fdc->sc_timo_ch); 987 /* clear the controller output buffer */ 988 for (i = 0; i < 4; i++) { 989 out_fdc(iot, ioh, NE7CMD_SENSEI); 990 (void)fdcresult(fdc); 991 } 992 993 /* fall through */ 994 case DORECAL: 995 out_fdc(iot, ioh, NE7CMD_RECAL); /* recalibrate function */ 996 out_fdc(iot, ioh, fd->sc_drive); 997 fdc->sc_state = RECALWAIT; 998 callout_reset(&fdc->sc_timo_ch, 5 * hz, fdctimeout, fdc); 999 return 1; /* will return later */ 1000 1001 case RECALWAIT: 1002 callout_stop(&fdc->sc_timo_ch); 1003 fdc->sc_state = RECALCOMPLETE; 1004 /* allow 1/30 second for heads to settle */ 1005 callout_reset(&fdc->sc_intr_ch, hz / 30, fdcpseudointr, fdc); 1006 return 1; /* will return later */ 1007 1008 case RECALCOMPLETE: 1009 out_fdc(iot, ioh, NE7CMD_SENSEI); 1010 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1011 #ifdef FD_DEBUG 1012 fdcstatus(fd->sc_dev, 2, "recalibrate failed"); 1013 #endif 1014 fdcretry(fdc); 1015 goto loop; 1016 } 1017 fd->sc_cylin = 0; 1018 goto doseek; 1019 1020 case MOTORWAIT: 1021 if (fd->sc_flags & FD_MOTOR_WAIT) 1022 return 1; /* time's not up yet */ 1023 goto doseek; 1024 1025 default: 1026 fdcstatus(fd->sc_dev, 0, "stray interrupt"); 1027 return 1; 1028 } 1029 #ifdef DIAGNOSTIC 1030 panic("%s: impossible", __func__); 1031 #endif 1032 #undef st0 1033 #undef cyl 1034 } 1035 1036 void 1037 fdcretry(struct fdc_softc *fdc) 1038 { 1039 struct fd_softc *fd; 1040 struct buf *bp; 1041 1042 fd = TAILQ_FIRST(&fdc->sc_drives); 1043 bp = bufq_peek(fd->sc_q); 1044 1045 switch (fdc->sc_errors) { 1046 case 0: 1047 /* try again */ 1048 fdc->sc_state = DOSEEK; 1049 break; 1050 1051 case 1: 1052 case 2: 1053 case 3: 1054 /* didn't work; try recalibrating */ 1055 fdc->sc_state = DORECAL; 1056 break; 1057 1058 case 4: 1059 /* still no go; reset the bastard */ 1060 fdc->sc_state = DORESET; 1061 break; 1062 1063 default: 1064 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1065 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1066 1067 fdcpstatus(7, fdc); 1068 bp->b_error = EIO; 1069 fdfinish(fd, bp); 1070 } 1071 fdc->sc_errors++; 1072 } 1073 1074 int 1075 fdioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 1076 { 1077 struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev)); 1078 struct disklabel buffer; 1079 int error; 1080 1081 switch (cmd) { 1082 case DIOCGDINFO: 1083 memset(&buffer, 0, sizeof(buffer)); 1084 1085 buffer.d_secpercyl = fd->sc_type->seccyl; 1086 buffer.d_type = DTYPE_FLOPPY; 1087 buffer.d_secsize = FDC_BSIZE; 1088 1089 if (readdisklabel(dev, fdstrategy, &buffer, NULL) != NULL) 1090 return EINVAL; 1091 1092 *(struct disklabel *)addr = buffer; 1093 return 0; 1094 1095 case DIOCWLABEL: 1096 if ((flag & FWRITE) == 0) 1097 return EBADF; 1098 /* XXX do something */ 1099 return 0; 1100 1101 case DIOCWDINFO: 1102 if ((flag & FWRITE) == 0) 1103 return EBADF; 1104 1105 error = setdisklabel(&buffer, (struct disklabel *)addr, 1106 0, NULL); 1107 if (error) 1108 return error; 1109 1110 error = writedisklabel(dev, fdstrategy, &buffer, NULL); 1111 return error; 1112 1113 default: 1114 return ENOTTY; 1115 } 1116 1117 #ifdef DIAGNOSTIC 1118 panic("%s: impossible", __func__); 1119 #endif 1120 } 1121 1122 /* 1123 * Mountroot hook: prompt the user to enter the root file system floppy. 1124 */ 1125 void 1126 fd_mountroot_hook(device_t dev) 1127 { 1128 int c; 1129 1130 printf("Insert filesystem floppy and press return."); 1131 cnpollc(1); 1132 for (;;) { 1133 c = cngetc(); 1134 if ((c == '\r') || (c == '\n')) { 1135 printf("\n"); 1136 break; 1137 } 1138 } 1139 cnpollc(0); 1140 } 1141