1 /* $NetBSD: fd.c,v 1.1 1997/04/09 04:49:09 jeremy Exp $ */ 2 3 /*- 4 * Copyright (c) 1993, 1994, 1995 Charles Hannum. 5 * Copyright (c) 1995 Paul Kranenburg. 6 * Copyright (c) 1990 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Don Ahn. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)fd.c 7.4 (Berkeley) 5/25/91 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/file.h> 47 #include <sys/ioctl.h> 48 #include <sys/device.h> 49 #include <sys/disklabel.h> 50 #include <sys/dkstat.h> 51 #include <sys/disk.h> 52 #include <sys/fdio.h> 53 #include <sys/buf.h> 54 #include <sys/malloc.h> 55 #include <sys/proc.h> 56 #include <sys/uio.h> 57 #include <sys/stat.h> 58 #include <sys/syslog.h> 59 #include <sys/queue.h> 60 #include <sys/conf.h> 61 62 #include <dev/cons.h> 63 64 #include <machine/cpu.h> 65 #include <machine/autoconf.h> 66 67 #include <sun3x/dev/fdreg.h> 68 #include <sun3x/dev/fdvar.h> 69 #include <sun3/sun3/interreg.h> 70 71 #define FDUNIT(dev) (minor(dev) / 8) 72 #define FDTYPE(dev) (minor(dev) % 8) 73 74 /* XXX misuse a flag to identify format operation */ 75 #define B_FORMAT B_XXX 76 #define b_cylin b_resid 77 78 #ifdef FD_DEBUG 79 int fdc_debug = 0; 80 #endif 81 82 enum fdc_state { 83 DEVIDLE = 0, 84 MOTORWAIT, 85 DOSEEK, 86 SEEKWAIT, 87 SEEKTIMEDOUT, 88 SEEKCOMPLETE, 89 DOIO, 90 IOCOMPLETE, 91 IOTIMEDOUT, 92 DORESET, 93 RESETCOMPLETE, 94 RESETTIMEDOUT, 95 DORECAL, 96 RECALWAIT, 97 RECALTIMEDOUT, 98 RECALCOMPLETE, 99 }; 100 101 /* software state, per controller */ 102 struct fdc_softc { 103 struct device sc_dev; /* boilerplate */ 104 caddr_t sc_reg; 105 struct fd_softc *sc_fd[4]; /* pointers to children */ 106 TAILQ_HEAD(drivehead, fd_softc) sc_drives; 107 enum fdc_state sc_state; 108 int sc_flags; 109 #define FDC_82077 0x01 110 #define FDC_NEEDHEADSETTLE 0x02 111 #define FDC_EIS 0x04 112 int sc_errors; /* number of retries so far */ 113 int sc_overruns; /* number of DMA overruns */ 114 int sc_cfg; /* current configuration */ 115 int sc_fcr; /* current image of floppy ctrlr reg. */ 116 struct fdcio sc_io; 117 #define sc_reg_msr sc_io.fdcio_reg_msr 118 #define sc_reg_fifo sc_io.fdcio_reg_fifo 119 #define sc_reg_fcr sc_io.fdcio_reg_fcr 120 #define sc_reg_fvr sc_io.fdcio_reg_fvr 121 #define sc_reg_drs sc_io.fdcio_reg_msr 122 #define sc_istate sc_io.fdcio_istate 123 #define sc_data sc_io.fdcio_data 124 #define sc_tc sc_io.fdcio_tc 125 #define sc_nstat sc_io.fdcio_nstat 126 #define sc_status sc_io.fdcio_status 127 #define sc_intrcnt sc_io.fdcio_intrcnt 128 }; 129 130 /* controller driver configuration */ 131 int fdcmatch __P((struct device *, struct cfdata *, void *)); 132 void fdcattach __P((struct device *, struct device *, void *)); 133 134 struct cfattach fdc_ca = { 135 sizeof(struct fdc_softc), fdcmatch, fdcattach 136 }; 137 138 struct cfdriver fdc_cd = { 139 NULL, "fdc", DV_DULL 140 }; 141 142 __inline struct fd_type *fd_dev_to_type __P((struct fd_softc *, dev_t)); 143 144 /* 145 * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how 146 * we tell them apart. 147 */ 148 struct fd_type { 149 int sectrac; /* sectors per track */ 150 int heads; /* number of heads */ 151 int seccyl; /* sectors per cylinder */ 152 int secsize; /* size code for sectors */ 153 int datalen; /* data len when secsize = 0 */ 154 int steprate; /* step rate and head unload time */ 155 int gap1; /* gap len between sectors */ 156 int gap2; /* formatting gap */ 157 int tracks; /* total num of tracks */ 158 int size; /* size of disk in sectors */ 159 int step; /* steps per cylinder */ 160 int rate; /* transfer speed code */ 161 int fillbyte; /* format fill byte */ 162 int interleave; /* interleave factor (formatting) */ 163 char *name; 164 }; 165 166 /* The order of entries in the following table is important -- BEWARE! */ 167 struct fd_type fd_types[] = { 168 { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,0xf6,1, "1.44MB" }, /* 1.44MB diskette */ 169 { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,0xf6,1, "1.2MB" }, /* 1.2 MB AT-diskettes */ 170 { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,0xf6,1, "360KB/AT" }, /* 360kB in 1.2MB drive */ 171 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,0xf6,1, "360KB/PC" }, /* 360kB PC diskettes */ 172 { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,0xf6,1, "720KB" }, /* 3.5" 720kB diskette */ 173 { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,0xf6,1, "720KB/x" }, /* 720kB in 1.2MB drive */ 174 { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,0xf6,1, "360KB/x" }, /* 360kB in 720kB drive */ 175 }; 176 177 /* software state, per disk (with up to 4 disks per ctlr) */ 178 struct fd_softc { 179 struct device sc_dv; /* generic device info */ 180 struct disk sc_dk; /* generic disk info */ 181 182 struct fd_type *sc_deftype; /* default type descriptor */ 183 struct fd_type *sc_type; /* current type descriptor */ 184 185 daddr_t sc_blkno; /* starting block number */ 186 int sc_bcount; /* byte count left */ 187 int sc_skip; /* bytes already transferred */ 188 int sc_nblks; /* number of blocks currently tranferring */ 189 int sc_nbytes; /* number of bytes currently tranferring */ 190 191 int sc_drive; /* physical unit number */ 192 int sc_flags; 193 #define FD_OPEN 0x01 /* it's open */ 194 #define FD_MOTOR 0x02 /* motor should be on */ 195 #define FD_MOTOR_WAIT 0x04 /* motor coming up */ 196 int sc_cylin; /* where we think the head is */ 197 int sc_opts; /* user-set options */ 198 199 void *sc_sdhook; /* shutdownhook cookie */ 200 201 TAILQ_ENTRY(fd_softc) sc_drivechain; 202 int sc_ops; /* I/O ops since last switch */ 203 struct buf sc_q; /* head of buf chain */ 204 }; 205 206 bdev_decl(fd); 207 cdev_decl(fd); 208 209 /* floppy driver configuration */ 210 int fdmatch __P((struct device *, struct cfdata *, void *)); 211 void fdattach __P((struct device *, struct device *, void *)); 212 213 struct cfattach fd_ca = { 214 sizeof(struct fd_softc), fdmatch, fdattach 215 }; 216 217 struct cfdriver fd_cd = { 218 NULL, "fd", DV_DISK 219 }; 220 221 void fdgetdisklabel __P((dev_t)); 222 int fd_get_parms __P((struct fd_softc *)); 223 void fdstrategy __P((struct buf *)); 224 void fdstart __P((struct fd_softc *)); 225 int fdprint __P((void *, const char *)); 226 227 struct dkdriver fddkdriver = { fdstrategy }; 228 229 struct fd_type *fd_nvtotype __P((char *, int, int)); 230 void fd_set_motor __P((struct fdc_softc *fdc)); 231 void fd_motor_off __P((void *arg)); 232 void fd_motor_on __P((void *arg)); 233 int fdcresult __P((struct fdc_softc *fdc)); 234 int out_fdc __P((struct fdc_softc *fdc, u_char x)); 235 void fdcstart __P((struct fdc_softc *fdc)); 236 void fdcstatus __P((struct device *dv, int n, char *s)); 237 void fdc_reset __P((struct fdc_softc *fdc)); 238 void fdctimeout __P((void *arg)); 239 void fdcpseudointr __P((void *arg)); 240 int fdchwintr __P((struct fdc_softc *)); 241 int fdcswintr __P((struct fdc_softc *)); 242 int fdcstate __P((struct fdc_softc *)); 243 void fdcretry __P((struct fdc_softc *fdc)); 244 void fdfinish __P((struct fd_softc *fd, struct buf *bp)); 245 int fdformat __P((dev_t, struct ne7_fd_formb *, struct proc *)); 246 void fd_do_eject __P((struct fdc_softc *, int)); 247 void fd_mountroot_hook __P((struct device *)); 248 static void fdconf __P((struct fdc_softc *)); 249 250 static int fdc_softpend = 0; 251 #ifndef FDC_SOFTPRI 252 #define FDC_SOFTPRI 2 253 #endif 254 #define FD_SET_SWINTR() { fdc_softpend = 1; isr_soft_request(FDC_SOFTPRI); } 255 256 /* 257 * The Floppy Control Register on the sun3x, not to be confused with the 258 * Floppy ControllER Registers that this driver mostly insterfaces with, 259 * controls some of the auxillary functions of the floppy drive. These 260 * include asserting the floppy eject and terminal data count (or TC) pins 261 * of the floppy drive and controller chip respectively. 262 * 263 * Often it is necessary to toggle individual bits within this register 264 * while keeping the others untouched. However, the register does not 265 * present its latched data to the processor when read. This prevents the 266 * use of a read-modify-write cycle that would normally be used to modify 267 * individual bits. To get around this we must keep a copy of register's 268 * current value and always insure that when we wish to modify the register, 269 * we actually modify the copy and synchronize the register to it. 270 */ 271 #define FCR_REG_SYNC() (*fdc->sc_reg_fcr = fdc->sc_fcr) 272 273 int 274 fdcmatch(parent, match, aux) 275 struct device *parent; 276 struct cfdata *match; 277 void *aux; 278 { 279 register struct confargs *ca = aux; 280 281 /* 282 * Floppy controller is on obio on sun3x. 283 */ 284 if (ca->ca_bustype != BUS_OBIO) 285 return (0); 286 287 if (ca->ca_intpri == -1) 288 ca->ca_intpri = 6; /* XXX */ 289 290 if (ca->ca_intvec == -1) 291 ca->ca_intvec = 0x40; /* XXX */ 292 293 if (bus_peek(ca->ca_bustype, ca->ca_paddr, sizeof(u_char)) == -1) { 294 return (0); 295 } 296 297 return (1); 298 } 299 300 /* 301 * Arguments passed between fdcattach and fdprobe. 302 */ 303 struct fdc_attach_args { 304 int fa_drive; 305 struct bootpath *fa_bootpath; 306 struct fd_type *fa_deftype; 307 }; 308 309 /* 310 * Print the location of a disk drive (called just before attaching the 311 * the drive). If `fdc' is not NULL, the drive was found but was not 312 * in the system config file; print the drive name as well. 313 * Return QUIET (config_find ignores this if the device was configured) to 314 * avoid printing `fdN not configured' messages. 315 */ 316 int 317 fdprint(aux, fdc) 318 void *aux; 319 const char *fdc; 320 { 321 register struct fdc_attach_args *fa = aux; 322 323 if (!fdc) 324 printf(" drive %d", fa->fa_drive); 325 return (QUIET); 326 } 327 328 static void 329 fdconf(fdc) 330 struct fdc_softc *fdc; 331 { 332 int vroom; 333 334 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 335 return; 336 337 /* 338 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 339 * the PROM thinks is appropriate. 340 */ 341 if ((vroom = fdc->sc_status[7]) == 0) 342 vroom = 0x64; 343 344 /* Configure controller to use FIFO and Implied Seek */ 345 out_fdc(fdc, NE7CMD_CFG); 346 out_fdc(fdc, vroom); 347 out_fdc(fdc, fdc->sc_cfg); 348 out_fdc(fdc, 0); /* PRETRK */ 349 /* No result phase */ 350 } 351 352 void 353 fdcattach(parent, self, aux) 354 struct device *parent, *self; 355 void *aux; 356 { 357 register struct confargs *ca = aux; 358 struct fdc_softc *fdc = (void *)self; 359 struct fdc_attach_args fa; 360 int pri, vec; 361 char code; 362 363 fdc->sc_reg = (caddr_t)bus_mapin(ca->ca_bustype, ca->ca_paddr, 364 sizeof(union fdreg)); 365 366 fdc->sc_state = DEVIDLE; 367 fdc->sc_istate = ISTATE_IDLE; 368 fdc->sc_flags |= FDC_EIS; 369 TAILQ_INIT(&fdc->sc_drives); 370 371 /* Assume a 82072 */ 372 code = '2'; 373 374 if (code == '7') { 375 panic("no 82077 fdc in this kernel"); 376 /* NOTREACHED */ 377 } else { 378 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 379 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 380 381 fdc->sc_reg_fcr = ((volatile u_int8_t *) fdc->sc_reg) 382 + FDC_FCR_OFFSET; 383 fdc->sc_reg_fvr = ((volatile u_int8_t *) fdc->sc_reg) 384 + FDC_FVR_OFFSET; 385 } 386 387 pri = ca->ca_intpri; 388 vec = ca->ca_intvec; 389 *fdc->sc_reg_fvr = vec; /* Program controller w/ interrupt vector */ 390 isr_add_vectored((isr_func_t) fdchwintr, (void *) fdc, pri, vec); 391 isr_add_autovect((isr_func_t) fdcswintr, (void *) fdc, FDC_SOFTPRI); 392 393 #ifdef FD_DEBUG 394 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 395 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 396 if (fdc_debug) 397 printf("[version cmd]"); 398 } 399 #endif 400 401 fdc_reset(fdc); 402 /* 403 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 404 * Note: CFG_EFIFO is active-low, initial threshold value: 8 405 */ 406 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 407 fdconf(fdc); 408 409 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 410 411 printf(": (softpri %d) chip 8207%c\n", FDC_SOFTPRI, code); 412 413 /* physical limit: four drives per controller. */ 414 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 415 fa.fa_deftype = NULL; /* unknown */ 416 fa.fa_deftype = &fd_types[0]; /* XXX */ 417 (void)config_found(self, (void *)&fa, fdprint); 418 } 419 } 420 421 int 422 fdmatch(parent, match, aux) 423 struct device *parent; 424 struct cfdata *match; 425 void *aux; 426 { 427 struct fdc_softc *fdc = (void *)parent; 428 struct fdc_attach_args *fa = aux; 429 int drive = fa->fa_drive; 430 int n, ok; 431 432 if (drive > 0) 433 /* XXX - for now, punt > 1 drives */ 434 return (0); 435 436 /* select drive and turn on motor */ 437 fdc->sc_fcr |= FCR_DSEL(drive) | FCR_MTRON; 438 FCR_REG_SYNC(); 439 /* wait for motor to spin up */ 440 delay(250000); 441 442 fdc->sc_nstat = 0; 443 out_fdc(fdc, NE7CMD_RECAL); 444 out_fdc(fdc, drive); 445 /* wait for recalibrate */ 446 for (n = 0; n < 10000; n++) { 447 delay(1000); 448 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 449 /* wait a bit longer till device *really* is ready */ 450 delay(100000); 451 if (out_fdc(fdc, NE7CMD_SENSEI)) 452 break; 453 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 454 /* 455 * Got `invalid command'; we interpret it 456 * to mean that the re-calibrate hasn't in 457 * fact finished yet 458 */ 459 continue; 460 break; 461 } 462 } 463 n = fdc->sc_nstat; 464 #ifdef FD_DEBUG 465 if (fdc_debug) { 466 int i; 467 printf("fdprobe: %d stati:", n); 468 for (i = 0; i < n; i++) 469 printf(" %x", fdc->sc_status[i]); 470 printf("\n"); 471 } 472 #endif 473 ok = (n == 2 && (fdc->sc_status[0] & 0xf8) == 0x20) ? 1 : 0; 474 475 /* turn off motor */ 476 fdc->sc_fcr &= ~FCR_MTRON; 477 FCR_REG_SYNC(); 478 479 return (ok); 480 } 481 482 /* 483 * Controller is working, and drive responded. Attach it. 484 */ 485 void 486 fdattach(parent, self, aux) 487 struct device *parent, *self; 488 void *aux; 489 { 490 struct fdc_softc *fdc = (void *)parent; 491 struct fd_softc *fd = (void *)self; 492 struct fdc_attach_args *fa = aux; 493 struct fd_type *type = fa->fa_deftype; 494 int drive = fa->fa_drive; 495 496 /* XXX Allow `flags' to override device type? */ 497 498 if (type) 499 printf(": %s %d cyl, %d head, %d sec\n", type->name, 500 type->tracks, type->heads, type->sectrac); 501 else 502 printf(": density unknown\n"); 503 504 fd->sc_cylin = -1; 505 fd->sc_drive = drive; 506 fd->sc_deftype = type; 507 fdc->sc_fd[drive] = fd; 508 509 /* 510 * Initialize and attach the disk structure. 511 */ 512 fd->sc_dk.dk_name = fd->sc_dv.dv_xname; 513 fd->sc_dk.dk_driver = &fddkdriver; 514 disk_attach(&fd->sc_dk); 515 516 #ifdef sparc 517 /* 518 * We're told if we're the boot device in fdcattach(). 519 */ 520 if (fa->fa_bootpath) 521 fa->fa_bootpath->dev = &fd->sc_dv; 522 #endif 523 #define OUT_FDC(sc, c) { \ 524 if (out_fdc((sc), (c))) \ 525 printf("fdc: specify command failed.\n");\ 526 } 527 /* specify command */ 528 OUT_FDC(fdc, NE7CMD_SPECIFY); 529 OUT_FDC(fdc, type->steprate); 530 /* 531 * The '|1' in the following statement turns on the 'Non-DMA' bit 532 * specifier in the last byte of the SPECIFY command as described in the 533 * datasheet I have. This is necessary for the driver to work on the 534 * sun3x, because the system will not respond to the chip's requests 535 * for DMA; there is no hardware on the motherboard to support it. 536 * By enabling this bit, we will force the chip to interrupt when its 537 * FIFO is full, at which point the interrupt handler will empty it and 538 * continue. This is ``pseudo-DMA''. 539 * -J 540 */ 541 OUT_FDC(fdc, 6|1); /* XXX head load time == 6ms */ 542 #undef OUT_FDC 543 544 /* 545 * Establish a mountroot_hook anyway in case we booted 546 * with RB_ASKNAME and get selected as the boot device. 547 */ 548 mountroothook_establish(fd_mountroot_hook, &fd->sc_dv); 549 550 /* Make sure the drive motor gets turned off at shutdown time. */ 551 fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd); 552 553 /* XXX Need to do some more fiddling with sc_dk. */ 554 dk_establish(&fd->sc_dk, &fd->sc_dv); 555 } 556 557 __inline struct fd_type * 558 fd_dev_to_type(fd, dev) 559 struct fd_softc *fd; 560 dev_t dev; 561 { 562 int type = FDTYPE(dev); 563 564 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 565 return (NULL); 566 return (type ? &fd_types[type - 1] : fd->sc_deftype); 567 } 568 569 void 570 fdstrategy(bp) 571 register struct buf *bp; /* IO operation to perform */ 572 { 573 struct fd_softc *fd; 574 int unit = FDUNIT(bp->b_dev); 575 int sz; 576 int s; 577 578 /* Valid unit, controller, and request? */ 579 if (unit >= fd_cd.cd_ndevs || 580 (fd = fd_cd.cd_devs[unit]) == 0 || 581 bp->b_blkno < 0 || 582 ((bp->b_bcount % FDC_BSIZE) != 0 && 583 (bp->b_flags & B_FORMAT) == 0)) { 584 bp->b_error = EINVAL; 585 goto bad; 586 } 587 588 /* If it's a null transfer, return immediately. */ 589 if (bp->b_bcount == 0) 590 goto done; 591 592 sz = howmany(bp->b_bcount, FDC_BSIZE); 593 594 if (bp->b_blkno + sz > fd->sc_type->size) { 595 sz = fd->sc_type->size - bp->b_blkno; 596 if (sz == 0) { 597 /* If exactly at end of disk, return EOF. */ 598 bp->b_resid = bp->b_bcount; 599 goto done; 600 } 601 if (sz < 0) { 602 /* If past end of disk, return EINVAL. */ 603 bp->b_error = EINVAL; 604 goto bad; 605 } 606 /* Otherwise, truncate request. */ 607 bp->b_bcount = sz << DEV_BSHIFT; 608 } 609 610 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 611 612 #ifdef FD_DEBUG 613 if (fdc_debug > 1) 614 printf("fdstrategy: b_blkno %d b_bcount %ld blkno %d cylin %ld\n", 615 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 616 #endif 617 618 /* Queue transfer on drive, activate drive and controller if idle. */ 619 s = splbio(); 620 disksort(&fd->sc_q, bp); 621 untimeout(fd_motor_off, fd); /* a good idea */ 622 if (!fd->sc_q.b_active) 623 fdstart(fd); 624 #ifdef DIAGNOSTIC 625 else { 626 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 627 if (fdc->sc_state == DEVIDLE) { 628 printf("fdstrategy: controller inactive\n"); 629 fdcstart(fdc); 630 } 631 } 632 #endif 633 splx(s); 634 return; 635 636 bad: 637 bp->b_flags |= B_ERROR; 638 done: 639 /* Toss transfer; we're done early. */ 640 biodone(bp); 641 } 642 643 void 644 fdstart(fd) 645 struct fd_softc *fd; 646 { 647 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 648 int active = fdc->sc_drives.tqh_first != 0; 649 650 /* Link into controller queue. */ 651 fd->sc_q.b_active = 1; 652 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 653 654 /* If controller not already active, start it. */ 655 if (!active) 656 fdcstart(fdc); 657 } 658 659 void 660 fdfinish(fd, bp) 661 struct fd_softc *fd; 662 struct buf *bp; 663 { 664 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 665 666 /* 667 * Move this drive to the end of the queue to give others a `fair' 668 * chance. We only force a switch if N operations are completed while 669 * another drive is waiting to be serviced, since there is a long motor 670 * startup delay whenever we switch. 671 */ 672 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 673 fd->sc_ops = 0; 674 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 675 if (bp->b_actf) { 676 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 677 } else 678 fd->sc_q.b_active = 0; 679 } 680 bp->b_resid = fd->sc_bcount; 681 fd->sc_skip = 0; 682 fd->sc_q.b_actf = bp->b_actf; 683 684 biodone(bp); 685 /* turn off motor 5s from now */ 686 timeout(fd_motor_off, fd, 5 * hz); 687 fdc->sc_state = DEVIDLE; 688 } 689 690 void 691 fdc_reset(fdc) 692 struct fdc_softc *fdc; 693 { 694 fdc->sc_fcr = 0; 695 FCR_REG_SYNC(); 696 697 *fdc->sc_reg_drs = DRS_RESET; 698 delay(10); 699 *fdc->sc_reg_drs = 0; 700 701 #ifdef FD_DEBUG 702 if (fdc_debug) 703 printf("fdc reset\n"); 704 #endif 705 } 706 707 void 708 fd_set_motor(fdc) 709 struct fdc_softc *fdc; 710 { 711 struct fd_softc *fd; 712 int n; 713 714 int on = 0; 715 716 for (n = 0; n < 4; n++) 717 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 718 on = 1; 719 if (on) { 720 fdc->sc_fcr |= FCR_DSEL(0)|FCR_MTRON; /* XXX */ 721 } else { 722 fdc->sc_fcr &= ~FCR_MTRON; 723 } 724 FCR_REG_SYNC(); 725 } 726 727 void 728 fd_motor_off(arg) 729 void *arg; 730 { 731 struct fd_softc *fd = arg; 732 int s; 733 734 s = splbio(); 735 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 736 fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent); 737 splx(s); 738 } 739 740 void 741 fd_motor_on(arg) 742 void *arg; 743 { 744 struct fd_softc *fd = arg; 745 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 746 int s; 747 748 s = splbio(); 749 fd->sc_flags &= ~FD_MOTOR_WAIT; 750 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 751 (void) fdcstate(fdc); 752 splx(s); 753 } 754 755 int 756 fdcresult(fdc) 757 struct fdc_softc *fdc; 758 { 759 u_char i; 760 int j = 100000, 761 n = 0; 762 763 for (; j; j--) { 764 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 765 if (i == NE7_RQM) 766 return (fdc->sc_nstat = n); 767 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 768 if (n >= sizeof(fdc->sc_status)) { 769 log(LOG_ERR, "fdcresult: overrun\n"); 770 return (-1); 771 } 772 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 773 } else 774 delay(10); 775 } 776 log(LOG_ERR, "fdcresult: timeout\n"); 777 return (fdc->sc_nstat = -1); 778 } 779 780 int 781 out_fdc(fdc, x) 782 struct fdc_softc *fdc; 783 u_char x; 784 { 785 int i = 100000; 786 787 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0) 788 delay(1); 789 if (i <= 0) 790 return (-1); 791 792 *fdc->sc_reg_fifo = x; 793 return (0); 794 } 795 796 int 797 fdopen(dev, flags, fmt, p) 798 dev_t dev; 799 int flags, fmt; 800 struct proc *p; 801 { 802 int unit, pmask; 803 struct fd_softc *fd; 804 struct fd_type *type; 805 806 unit = FDUNIT(dev); 807 if (unit >= fd_cd.cd_ndevs) 808 return (ENXIO); 809 fd = fd_cd.cd_devs[unit]; 810 if (fd == 0) 811 return (ENXIO); 812 type = fd_dev_to_type(fd, dev); 813 if (type == NULL) 814 return (ENXIO); 815 816 if ((fd->sc_flags & FD_OPEN) != 0 && 817 fd->sc_type != type) 818 return (EBUSY); 819 820 fd->sc_type = type; 821 fd->sc_cylin = -1; 822 fd->sc_flags |= FD_OPEN; 823 824 /* 825 * Only update the disklabel if we're not open anywhere else. 826 */ 827 if (fd->sc_dk.dk_openmask == 0) 828 fdgetdisklabel(dev); 829 830 pmask = (1 << DISKPART(dev)); 831 832 switch (fmt) { 833 case S_IFCHR: 834 fd->sc_dk.dk_copenmask |= pmask; 835 break; 836 837 case S_IFBLK: 838 fd->sc_dk.dk_bopenmask |= pmask; 839 break; 840 } 841 fd->sc_dk.dk_openmask = 842 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 843 844 return (0); 845 } 846 847 int 848 fdclose(dev, flags, fmt, p) 849 dev_t dev; 850 int flags, fmt; 851 struct proc *p; 852 { 853 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 854 int pmask = (1 << DISKPART(dev)); 855 856 fd->sc_flags &= ~FD_OPEN; 857 fd->sc_opts &= ~(FDOPT_NORETRY|FDOPT_SILENT); 858 859 switch (fmt) { 860 case S_IFCHR: 861 fd->sc_dk.dk_copenmask &= ~pmask; 862 break; 863 864 case S_IFBLK: 865 fd->sc_dk.dk_bopenmask &= ~pmask; 866 break; 867 } 868 fd->sc_dk.dk_openmask = 869 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 870 871 return (0); 872 } 873 874 int 875 fdread(dev, uio, flag) 876 dev_t dev; 877 struct uio *uio; 878 int flag; 879 { 880 881 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 882 } 883 884 int 885 fdwrite(dev, uio, flag) 886 dev_t dev; 887 struct uio *uio; 888 int flag; 889 { 890 891 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 892 } 893 894 void 895 fdcstart(fdc) 896 struct fdc_softc *fdc; 897 { 898 899 #ifdef DIAGNOSTIC 900 /* only got here if controller's drive queue was inactive; should 901 be in idle state */ 902 if (fdc->sc_state != DEVIDLE) { 903 printf("fdcstart: not idle\n"); 904 return; 905 } 906 #endif 907 (void) fdcstate(fdc); 908 } 909 910 void 911 fdcstatus(dv, n, s) 912 struct device *dv; 913 int n; 914 char *s; 915 { 916 struct fdc_softc *fdc = (void *)dv->dv_parent; 917 char bits[64]; 918 #if 0 919 /* 920 * A 82072 seems to return <invalid command> on 921 * gratuitous Sense Interrupt commands. 922 */ 923 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 924 out_fdc(fdc, NE7CMD_SENSEI); 925 (void) fdcresult(fdc); 926 n = 2; 927 } 928 #endif 929 930 /* Just print last status */ 931 n = fdc->sc_nstat; 932 933 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 934 935 switch (n) { 936 case 0: 937 printf("\n"); 938 break; 939 case 2: 940 printf(" (st0 %s cyl %d)\n", 941 bitmask_snprintf(fdc->sc_status[0], NE7_ST0BITS, 942 bits, sizeof(bits)), fdc->sc_status[1]); 943 break; 944 case 7: 945 printf(" (st0 %s", bitmask_snprintf(fdc->sc_status[0], 946 NE7_ST0BITS, bits, sizeof(bits))); 947 printf(" st1 %s", bitmask_snprintf(fdc->sc_status[1], 948 NE7_ST1BITS, bits, sizeof(bits))); 949 printf(" st2 %s", bitmask_snprintf(fdc->sc_status[2], 950 NE7_ST2BITS, bits, sizeof(bits))); 951 printf(" cyl %d head %d sec %d)\n", 952 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 953 break; 954 #ifdef DIAGNOSTIC 955 default: 956 printf(" fdcstatus: weird size: %d\n", n); 957 break; 958 #endif 959 } 960 } 961 962 void 963 fdctimeout(arg) 964 void *arg; 965 { 966 struct fdc_softc *fdc = arg; 967 struct fd_softc *fd = fdc->sc_drives.tqh_first; 968 int s; 969 970 s = splbio(); 971 fdcstatus(&fd->sc_dv, 0, "timeout"); 972 973 if (fd->sc_q.b_actf) 974 fdc->sc_state++; 975 else 976 fdc->sc_state = DEVIDLE; 977 978 (void) fdcstate(fdc); 979 splx(s); 980 } 981 982 void 983 fdcpseudointr(arg) 984 void *arg; 985 { 986 struct fdc_softc *fdc = arg; 987 int s; 988 989 /* Just ensure it has the right spl. */ 990 s = splbio(); 991 (void) fdcstate(fdc); 992 splx(s); 993 } 994 995 996 /* 997 * hardware interrupt entry point: must be converted to `fast' 998 * (in-window) handler. 999 */ 1000 int 1001 fdchwintr(fdc) 1002 struct fdc_softc *fdc; 1003 { 1004 1005 /* 1006 * This code was reverse engineered from the SPARC bsd_fdintr.s. 1007 */ 1008 switch (fdc->sc_istate) { 1009 case ISTATE_SENSEI: 1010 out_fdc(fdc, NE7CMD_SENSEI); 1011 fdcresult(fdc); 1012 fdc->sc_istate = ISTATE_DONE; 1013 FD_SET_SWINTR(); 1014 return (1); 1015 case ISTATE_DMA: 1016 break; 1017 default: 1018 fdc->sc_istate = ISTATE_SPURIOUS; 1019 fdc->sc_fcr &= ~(FCR_DSEL(0)); /* Does this help? */ 1020 FD_SET_SWINTR(); 1021 return (1); 1022 } 1023 1024 for (;;) { 1025 register int msr; 1026 1027 msr = *fdc->sc_reg_msr; 1028 1029 if ((msr & NE7_RQM) == 0) 1030 break; 1031 1032 if ((msr & NE7_NDM) == 0) { 1033 fdcresult(fdc); 1034 fdc->sc_istate = ISTATE_DONE; 1035 FD_SET_SWINTR(); 1036 printf("fdc: overrun: tc = %d\n", fdc->sc_tc); 1037 break; 1038 } 1039 1040 if (msr & NE7_DIO) { 1041 *fdc->sc_data++ = *fdc->sc_reg_fifo; 1042 } else { 1043 *fdc->sc_reg_fifo = *fdc->sc_data++; 1044 } 1045 if (--fdc->sc_tc == 0) { 1046 fdc->sc_fcr |= FCR_TC; 1047 FCR_REG_SYNC(); 1048 fdc->sc_istate = ISTATE_DONE; 1049 delay(10); 1050 fdc->sc_fcr &= ~FCR_TC; 1051 FCR_REG_SYNC(); 1052 fdcresult(fdc); 1053 FD_SET_SWINTR(); 1054 break; 1055 } 1056 } 1057 return (1); 1058 } 1059 1060 int 1061 fdcswintr(fdc) 1062 struct fdc_softc *fdc; 1063 { 1064 int s; 1065 1066 if (fdc_softpend) { 1067 isr_soft_clear(FDC_SOFTPRI); 1068 fdc_softpend = 0; 1069 } else { 1070 return 0; 1071 } 1072 1073 if (fdc->sc_istate != ISTATE_DONE) 1074 return (1); 1075 1076 fdc->sc_istate = ISTATE_IDLE; 1077 s = splbio(); 1078 fdcstate(fdc); 1079 splx(s); 1080 return (1); 1081 } 1082 1083 int 1084 fdcstate(fdc) 1085 struct fdc_softc *fdc; 1086 { 1087 #define st0 fdc->sc_status[0] 1088 #define st1 fdc->sc_status[1] 1089 #define cyl fdc->sc_status[1] 1090 #define OUT_FDC(fdc, c, s) \ 1091 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1092 1093 struct fd_softc *fd; 1094 struct buf *bp; 1095 int read, head, sec, nblks; 1096 struct fd_type *type; 1097 struct ne7_fd_formb *finfo = NULL; 1098 1099 1100 if (fdc->sc_istate != ISTATE_IDLE) { 1101 /* Trouble... */ 1102 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1103 fdc->sc_state, fdc->sc_istate); 1104 fdc->sc_istate = ISTATE_IDLE; 1105 if (fdc->sc_state == RESETCOMPLETE || 1106 fdc->sc_state == RESETTIMEDOUT) { 1107 panic("fdcintr: spurious interrupt can't be cleared"); 1108 } 1109 goto doreset; 1110 } 1111 1112 loop: 1113 /* Is there a drive for the controller to do a transfer with? */ 1114 fd = fdc->sc_drives.tqh_first; 1115 if (fd == NULL) { 1116 fdc->sc_state = DEVIDLE; 1117 return (0); 1118 } 1119 1120 /* Is there a transfer to this drive? If not, deactivate drive. */ 1121 bp = fd->sc_q.b_actf; 1122 if (bp == NULL) { 1123 fd->sc_ops = 0; 1124 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1125 fd->sc_q.b_active = 0; 1126 goto loop; 1127 } 1128 1129 if (bp->b_flags & B_FORMAT) 1130 finfo = (struct ne7_fd_formb *)bp->b_data; 1131 1132 switch (fdc->sc_state) { 1133 case DEVIDLE: 1134 fdc->sc_errors = 0; 1135 fd->sc_skip = 0; 1136 fd->sc_bcount = bp->b_bcount; 1137 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1138 untimeout(fd_motor_off, fd); 1139 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1140 fdc->sc_state = MOTORWAIT; 1141 return (1); 1142 } 1143 if ((fd->sc_flags & FD_MOTOR) == 0) { 1144 /* Turn on the motor, being careful about pairing. */ 1145 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1146 if (ofd && ofd->sc_flags & FD_MOTOR) { 1147 untimeout(fd_motor_off, ofd); 1148 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1149 } 1150 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1151 fd_set_motor(fdc); 1152 fdc->sc_state = MOTORWAIT; 1153 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1154 /* Allow .25s for motor to stabilize. */ 1155 timeout(fd_motor_on, fd, hz / 4); 1156 } else { 1157 fd->sc_flags &= ~FD_MOTOR_WAIT; 1158 goto loop; 1159 } 1160 return (1); 1161 } 1162 /* Make sure the right drive is selected. */ 1163 fd_set_motor(fdc); 1164 1165 /* fall through */ 1166 case DOSEEK: 1167 doseek: 1168 if ((fdc->sc_flags & FDC_EIS) && 1169 (bp->b_flags & B_FORMAT) == 0) { 1170 fd->sc_cylin = bp->b_cylin; 1171 /* We use implied seek */ 1172 goto doio; 1173 } 1174 1175 if (fd->sc_cylin == bp->b_cylin) 1176 goto doio; 1177 1178 /* specify command */ 1179 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1180 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1181 /* 1182 * The '|1' in the following statement turns on the 'Non-DMA' bit 1183 * specifier in the last byte of the SPECIFY command as described in the 1184 * datasheet I have. This is necessary for the driver to work on the 1185 * sun3x, because the system will not respond to the chip's requests 1186 * for DMA; there is no hardware on the motherboard to support it. 1187 * By enabling this bit, we will force the chip to interrupt when its 1188 * FIFO is full, at which point the interrupt handler will empty it and 1189 * continue. This is ``pseudo-DMA''. 1190 * -J 1191 */ 1192 OUT_FDC(fdc, 6|1, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1193 1194 fdc->sc_istate = ISTATE_SENSEI; 1195 /* seek function */ 1196 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1197 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1198 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1199 1200 fd->sc_cylin = -1; 1201 fdc->sc_state = SEEKWAIT; 1202 fdc->sc_nstat = 0; 1203 1204 fd->sc_dk.dk_seek++; 1205 disk_busy(&fd->sc_dk); 1206 1207 timeout(fdctimeout, fdc, 4 * hz); 1208 return (1); 1209 1210 case DOIO: 1211 doio: 1212 if (finfo) 1213 fd->sc_skip = (char *)&(finfo->fd_formb_cylno(0)) - 1214 (char *)finfo; 1215 type = fd->sc_type; 1216 sec = fd->sc_blkno % type->seccyl; 1217 nblks = type->seccyl - sec; 1218 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1219 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1220 fd->sc_nblks = nblks; 1221 fd->sc_nbytes = finfo ? bp->b_bcount : nblks * FDC_BSIZE; 1222 head = sec / type->sectrac; 1223 sec -= head * type->sectrac; 1224 #ifdef DIAGNOSTIC 1225 {int block; 1226 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1227 if (block != fd->sc_blkno) { 1228 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1229 #ifdef DDB 1230 Debugger(); 1231 #endif 1232 }} 1233 #endif 1234 read = bp->b_flags & B_READ; 1235 1236 /* Setup for pseudo DMA */ 1237 fdc->sc_data = bp->b_data + fd->sc_skip; 1238 fdc->sc_tc = fd->sc_nbytes; 1239 1240 *fdc->sc_reg_drs = type->rate; 1241 #ifdef FD_DEBUG 1242 if (fdc_debug > 1) 1243 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1244 read ? "read" : "write", fd->sc_drive, 1245 fd->sc_cylin, head, sec, nblks); 1246 #endif 1247 fdc->sc_state = IOCOMPLETE; 1248 fdc->sc_istate = ISTATE_DMA; 1249 fdc->sc_nstat = 0; 1250 if (finfo) { 1251 /* formatting */ 1252 OUT_FDC(fdc, NE7CMD_FORMAT, IOTIMEDOUT); 1253 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1254 OUT_FDC(fdc, finfo->fd_formb_secshift, IOTIMEDOUT); 1255 OUT_FDC(fdc, finfo->fd_formb_nsecs, IOTIMEDOUT); 1256 OUT_FDC(fdc, finfo->fd_formb_gaplen, IOTIMEDOUT); 1257 OUT_FDC(fdc, finfo->fd_formb_fillbyte, IOTIMEDOUT); 1258 } else { 1259 if (read) 1260 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); 1261 else 1262 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); 1263 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1264 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /*track*/ 1265 OUT_FDC(fdc, head, IOTIMEDOUT); 1266 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /*sector+1*/ 1267 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/*sector size*/ 1268 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/*secs/track*/ 1269 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /*gap1 size*/ 1270 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/*data length*/ 1271 } 1272 1273 disk_busy(&fd->sc_dk); 1274 1275 /* allow 2 seconds for operation */ 1276 timeout(fdctimeout, fdc, 2 * hz); 1277 return (1); /* will return later */ 1278 1279 case SEEKWAIT: 1280 untimeout(fdctimeout, fdc); 1281 fdc->sc_state = SEEKCOMPLETE; 1282 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1283 /* allow 1/50 second for heads to settle */ 1284 timeout(fdcpseudointr, fdc, hz / 50); 1285 return (1); /* will return later */ 1286 } 1287 1288 case SEEKCOMPLETE: 1289 disk_unbusy(&fd->sc_dk, 0); /* no data on seek */ 1290 1291 /* Make sure seek really happened. */ 1292 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1293 cyl != bp->b_cylin * fd->sc_type->step) { 1294 #ifdef FD_DEBUG 1295 if (fdc_debug) 1296 fdcstatus(&fd->sc_dv, 2, "seek failed"); 1297 #endif 1298 fdcretry(fdc); 1299 goto loop; 1300 } 1301 fd->sc_cylin = bp->b_cylin; 1302 goto doio; 1303 1304 case IOTIMEDOUT: 1305 fdc->sc_fcr |= FCR_TC; 1306 FCR_REG_SYNC(); 1307 delay(10); 1308 fdc->sc_fcr &= ~FCR_TC; 1309 FCR_REG_SYNC(); 1310 (void)fdcresult(fdc); 1311 case SEEKTIMEDOUT: 1312 case RECALTIMEDOUT: 1313 case RESETTIMEDOUT: 1314 fdcretry(fdc); 1315 goto loop; 1316 1317 case IOCOMPLETE: /* IO DONE, post-analyze */ 1318 untimeout(fdctimeout, fdc); 1319 1320 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid)); 1321 1322 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1323 #ifdef FD_DEBUG 1324 if (fdc_debug) { 1325 fdcstatus(&fd->sc_dv, 7, 1326 bp->b_flags & B_READ 1327 ? "read failed" : "write failed"); 1328 printf("blkno %d nblks %d tc %d\n", 1329 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1330 } 1331 #endif 1332 if (fdc->sc_nstat == 7 && 1333 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1334 1335 /* 1336 * Silently retry overruns if no other 1337 * error bit is set. Adjust threshold. 1338 */ 1339 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1340 if (thr < 15) { 1341 thr++; 1342 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1343 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1344 #ifdef FD_DEBUG 1345 if (fdc_debug) 1346 printf("fdc: %d -> threshold\n", thr); 1347 #endif 1348 fdconf(fdc); 1349 fdc->sc_overruns = 0; 1350 } 1351 if (++fdc->sc_overruns < 3) { 1352 fdc->sc_state = DOIO; 1353 goto loop; 1354 } 1355 } 1356 fdcretry(fdc); 1357 goto loop; 1358 } 1359 if (fdc->sc_errors) { 1360 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1361 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1362 printf("\n"); 1363 fdc->sc_errors = 0; 1364 } else { 1365 if (--fdc->sc_overruns < -20) { 1366 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1367 if (thr > 0) { 1368 thr--; 1369 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1370 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1371 #ifdef FD_DEBUG 1372 if (fdc_debug) 1373 printf("fdc: %d -> threshold\n", thr); 1374 #endif 1375 fdconf(fdc); 1376 } 1377 fdc->sc_overruns = 0; 1378 } 1379 } 1380 fd->sc_blkno += fd->sc_nblks; 1381 fd->sc_skip += fd->sc_nbytes; 1382 fd->sc_bcount -= fd->sc_nbytes; 1383 if (!finfo && fd->sc_bcount > 0) { 1384 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1385 goto doseek; 1386 } 1387 fdfinish(fd, bp); 1388 goto loop; 1389 1390 case DORESET: 1391 doreset: 1392 /* try a reset, keep motor on */ 1393 fd_set_motor(fdc); 1394 delay(100); 1395 fdc_reset(fdc); 1396 fdc->sc_nstat = 0; 1397 fdc->sc_istate = ISTATE_SENSEI; 1398 fdc->sc_state = RESETCOMPLETE; 1399 timeout(fdctimeout, fdc, hz / 2); 1400 return (1); /* will return later */ 1401 1402 case RESETCOMPLETE: 1403 untimeout(fdctimeout, fdc); 1404 fdconf(fdc); 1405 1406 /* fall through */ 1407 case DORECAL: 1408 fdc->sc_state = RECALWAIT; 1409 fdc->sc_istate = ISTATE_SENSEI; 1410 fdc->sc_nstat = 0; 1411 /* recalibrate function */ 1412 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1413 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1414 timeout(fdctimeout, fdc, 5 * hz); 1415 return (1); /* will return later */ 1416 1417 case RECALWAIT: 1418 untimeout(fdctimeout, fdc); 1419 fdc->sc_state = RECALCOMPLETE; 1420 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1421 /* allow 1/30 second for heads to settle */ 1422 timeout(fdcpseudointr, fdc, hz / 30); 1423 return (1); /* will return later */ 1424 } 1425 1426 case RECALCOMPLETE: 1427 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1428 #ifdef FD_DEBUG 1429 if (fdc_debug) 1430 fdcstatus(&fd->sc_dv, 2, "recalibrate failed"); 1431 #endif 1432 fdcretry(fdc); 1433 goto loop; 1434 } 1435 fd->sc_cylin = 0; 1436 goto doseek; 1437 1438 case MOTORWAIT: 1439 if (fd->sc_flags & FD_MOTOR_WAIT) 1440 return (1); /* time's not up yet */ 1441 goto doseek; 1442 1443 default: 1444 fdcstatus(&fd->sc_dv, 0, "stray interrupt"); 1445 return (1); 1446 } 1447 #ifdef DIAGNOSTIC 1448 panic("fdcintr: impossible"); 1449 #endif 1450 #undef st0 1451 #undef st1 1452 #undef cyl 1453 } 1454 1455 void 1456 fdcretry(fdc) 1457 struct fdc_softc *fdc; 1458 { 1459 char bits[64]; 1460 struct fd_softc *fd; 1461 struct buf *bp; 1462 1463 fd = fdc->sc_drives.tqh_first; 1464 bp = fd->sc_q.b_actf; 1465 1466 fdc->sc_overruns = 0; 1467 if (fd->sc_opts & FDOPT_NORETRY) 1468 goto fail; 1469 1470 switch (fdc->sc_errors) { 1471 case 0: 1472 /* try again */ 1473 fdc->sc_state = 1474 (fdc->sc_flags & FDC_EIS) ? DOIO : DOSEEK; 1475 break; 1476 1477 case 1: case 2: case 3: 1478 /* didn't work; try recalibrating */ 1479 fdc->sc_state = DORECAL; 1480 break; 1481 1482 case 4: 1483 /* still no go; reset the bastard */ 1484 fdc->sc_state = DORESET; 1485 break; 1486 1487 default: 1488 fail: 1489 if ((fd->sc_opts & FDOPT_SILENT) == 0) { 1490 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1491 fd->sc_skip / FDC_BSIZE, 1492 (struct disklabel *)NULL); 1493 1494 printf(" (st0 %s", bitmask_snprintf(fdc->sc_status[0], 1495 NE7_ST0BITS, bits, sizeof(bits))); 1496 printf(" st1 %s", bitmask_snprintf(fdc->sc_status[1], 1497 NE7_ST1BITS, bits, sizeof(bits))); 1498 printf(" st2 %s", bitmask_snprintf(fdc->sc_status[2], 1499 NE7_ST2BITS, bits, sizeof(bits))); 1500 printf(" cyl %d head %d sec %d)\n", 1501 fdc->sc_status[3], fdc->sc_status[4], 1502 fdc->sc_status[5]); 1503 } 1504 1505 bp->b_flags |= B_ERROR; 1506 bp->b_error = EIO; 1507 fdfinish(fd, bp); 1508 } 1509 fdc->sc_errors++; 1510 } 1511 1512 int 1513 fdsize(dev) 1514 dev_t dev; 1515 { 1516 1517 /* Swapping to floppies would not make sense. */ 1518 return (-1); 1519 } 1520 1521 int 1522 fddump(dev, blkno, va, size) 1523 dev_t dev; 1524 daddr_t blkno; 1525 caddr_t va; 1526 size_t size; 1527 { 1528 1529 /* Not implemented. */ 1530 return (EINVAL); 1531 } 1532 1533 int 1534 fdioctl(dev, cmd, addr, flag, p) 1535 dev_t dev; 1536 u_long cmd; 1537 caddr_t addr; 1538 int flag; 1539 struct proc *p; 1540 { 1541 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 1542 struct fdformat_parms *form_parms; 1543 struct fdformat_cmd *form_cmd; 1544 struct ne7_fd_formb fd_formb; 1545 int il[FD_MAX_NSEC + 1]; 1546 int i, j; 1547 int error; 1548 1549 switch (cmd) { 1550 case DIOCGDINFO: 1551 *(struct disklabel *)addr = *(fd->sc_dk.dk_label); 1552 return 0; 1553 1554 case DIOCWLABEL: 1555 if ((flag & FWRITE) == 0) 1556 return EBADF; 1557 /* XXX do something */ 1558 return (0); 1559 1560 case DIOCWDINFO: 1561 if ((flag & FWRITE) == 0) 1562 return (EBADF); 1563 1564 error = setdisklabel(fd->sc_dk.dk_label, 1565 (struct disklabel *)addr, 0, 1566 fd->sc_dk.dk_cpulabel); 1567 if (error) 1568 return (error); 1569 1570 error = writedisklabel(dev, fdstrategy, 1571 fd->sc_dk.dk_label, 1572 fd->sc_dk.dk_cpulabel); 1573 return (error); 1574 1575 case DIOCLOCK: 1576 /* 1577 * Nothing to do here, really. 1578 */ 1579 return (0); 1580 1581 case DIOCEJECT: 1582 fd_do_eject((void *)fd->sc_dv.dv_parent, fd->sc_drive); 1583 return (0); 1584 1585 case FDIOCGETFORMAT: 1586 form_parms = (struct fdformat_parms *)addr; 1587 form_parms->fdformat_version = FDFORMAT_VERSION; 1588 form_parms->nbps = 128 * (1 << fd->sc_type->secsize); 1589 form_parms->ncyl = fd->sc_type->tracks; 1590 form_parms->nspt = fd->sc_type->sectrac; 1591 form_parms->ntrk = fd->sc_type->heads; 1592 form_parms->stepspercyl = fd->sc_type->step; 1593 form_parms->gaplen = fd->sc_type->gap2; 1594 form_parms->fillbyte = fd->sc_type->fillbyte; 1595 form_parms->interleave = fd->sc_type->interleave; 1596 switch (fd->sc_type->rate) { 1597 case FDC_500KBPS: 1598 form_parms->xfer_rate = 500 * 1024; 1599 break; 1600 case FDC_300KBPS: 1601 form_parms->xfer_rate = 300 * 1024; 1602 break; 1603 case FDC_250KBPS: 1604 form_parms->xfer_rate = 250 * 1024; 1605 break; 1606 default: 1607 return (EINVAL); 1608 } 1609 return (0); 1610 1611 case FDIOCSETFORMAT: 1612 if ((flag & FWRITE) == 0) 1613 return (EBADF); /* must be opened for writing */ 1614 1615 form_parms = (struct fdformat_parms *)addr; 1616 if (form_parms->fdformat_version != FDFORMAT_VERSION) 1617 return (EINVAL);/* wrong version of formatting prog */ 1618 1619 i = form_parms->nbps >> 7; 1620 if ((form_parms->nbps & 0x7f) || ffs(i) == 0 || 1621 i & ~(1 << (ffs(i)-1))) 1622 /* not a power-of-two multiple of 128 */ 1623 return (EINVAL); 1624 1625 switch (form_parms->xfer_rate) { 1626 case 500 * 1024: 1627 fd->sc_type->rate = FDC_500KBPS; 1628 break; 1629 case 300 * 1024: 1630 fd->sc_type->rate = FDC_300KBPS; 1631 break; 1632 case 250 * 1024: 1633 fd->sc_type->rate = FDC_250KBPS; 1634 break; 1635 default: 1636 return (EINVAL); 1637 } 1638 1639 if (form_parms->nspt > FD_MAX_NSEC || 1640 form_parms->fillbyte > 0xff || 1641 form_parms->interleave > 0xff) 1642 return EINVAL; 1643 fd->sc_type->sectrac = form_parms->nspt; 1644 if (form_parms->ntrk != 2 && form_parms->ntrk != 1) 1645 return EINVAL; 1646 fd->sc_type->heads = form_parms->ntrk; 1647 fd->sc_type->seccyl = form_parms->nspt * form_parms->ntrk; 1648 fd->sc_type->secsize = ffs(i)-1; 1649 fd->sc_type->gap2 = form_parms->gaplen; 1650 fd->sc_type->tracks = form_parms->ncyl; 1651 fd->sc_type->size = fd->sc_type->seccyl * form_parms->ncyl * 1652 form_parms->nbps / DEV_BSIZE; 1653 fd->sc_type->step = form_parms->stepspercyl; 1654 fd->sc_type->fillbyte = form_parms->fillbyte; 1655 fd->sc_type->interleave = form_parms->interleave; 1656 return 0; 1657 1658 case FDIOCFORMAT_TRACK: 1659 if((flag & FWRITE) == 0) 1660 /* must be opened for writing */ 1661 return (EBADF); 1662 form_cmd = (struct fdformat_cmd *)addr; 1663 if (form_cmd->formatcmd_version != FDFORMAT_VERSION) 1664 /* wrong version of formatting prog */ 1665 return (EINVAL); 1666 1667 if (form_cmd->head >= fd->sc_type->heads || 1668 form_cmd->cylinder >= fd->sc_type->tracks) { 1669 return (EINVAL); 1670 } 1671 1672 fd_formb.head = form_cmd->head; 1673 fd_formb.cyl = form_cmd->cylinder; 1674 fd_formb.transfer_rate = fd->sc_type->rate; 1675 fd_formb.fd_formb_secshift = fd->sc_type->secsize; 1676 fd_formb.fd_formb_nsecs = fd->sc_type->sectrac; 1677 fd_formb.fd_formb_gaplen = fd->sc_type->gap2; 1678 fd_formb.fd_formb_fillbyte = fd->sc_type->fillbyte; 1679 1680 bzero(il,sizeof il); 1681 for (j = 0, i = 1; i <= fd_formb.fd_formb_nsecs; i++) { 1682 while (il[(j%fd_formb.fd_formb_nsecs)+1]) 1683 j++; 1684 il[(j%fd_formb.fd_formb_nsecs)+1] = i; 1685 j += fd->sc_type->interleave; 1686 } 1687 for (i = 0; i < fd_formb.fd_formb_nsecs; i++) { 1688 fd_formb.fd_formb_cylno(i) = form_cmd->cylinder; 1689 fd_formb.fd_formb_headno(i) = form_cmd->head; 1690 fd_formb.fd_formb_secno(i) = il[i+1]; 1691 fd_formb.fd_formb_secsize(i) = fd->sc_type->secsize; 1692 } 1693 1694 return fdformat(dev, &fd_formb, p); 1695 1696 case FDIOCGETOPTS: /* get drive options */ 1697 *(int *)addr = fd->sc_opts; 1698 return (0); 1699 1700 case FDIOCSETOPTS: /* set drive options */ 1701 fd->sc_opts = *(int *)addr; 1702 return (0); 1703 1704 #ifdef DEBUG 1705 case _IO('f', 100): 1706 { 1707 int i; 1708 struct fdc_softc *fdc = (struct fdc_softc *) 1709 fd->sc_dv.dv_parent; 1710 1711 out_fdc(fdc, NE7CMD_DUMPREG); 1712 fdcresult(fdc); 1713 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1714 for (i = 0; i < fdc->sc_nstat; i++) 1715 printf(" %x", fdc->sc_status[i]); 1716 printf(">\n"); 1717 } 1718 1719 return (0); 1720 case _IOW('f', 101, int): 1721 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg &= 1722 ~CFG_THRHLD_MASK; 1723 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |= 1724 (*(int *)addr & CFG_THRHLD_MASK); 1725 fdconf((struct fdc_softc *) fd->sc_dv.dv_parent); 1726 return (0); 1727 case _IO('f', 102): 1728 { 1729 int i; 1730 struct fdc_softc *fdc = (struct fdc_softc *) 1731 fd->sc_dv.dv_parent; 1732 out_fdc(fdc, NE7CMD_SENSEI); 1733 fdcresult(fdc); 1734 printf("sensei(%d regs): <", fdc->sc_nstat); 1735 for (i=0; i< fdc->sc_nstat; i++) 1736 printf(" 0x%x", fdc->sc_status[i]); 1737 } 1738 printf(">\n"); 1739 return (0); 1740 #endif 1741 default: 1742 return (ENOTTY); 1743 } 1744 1745 #ifdef DIAGNOSTIC 1746 panic("fdioctl: impossible"); 1747 #endif 1748 } 1749 1750 int 1751 fdformat(dev, finfo, p) 1752 dev_t dev; 1753 struct ne7_fd_formb *finfo; 1754 struct proc *p; 1755 { 1756 int rv = 0, s; 1757 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 1758 struct fd_type *type = fd->sc_type; 1759 struct buf *bp; 1760 1761 /* set up a buffer header for fdstrategy() */ 1762 bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT); 1763 if (bp == 0) 1764 return (ENOBUFS); 1765 1766 PHOLD(p); 1767 bzero((void *)bp, sizeof(struct buf)); 1768 bp->b_flags = B_BUSY | B_PHYS | B_FORMAT; 1769 bp->b_proc = p; 1770 bp->b_dev = dev; 1771 1772 /* 1773 * calculate a fake blkno, so fdstrategy() would initiate a 1774 * seek to the requested cylinder 1775 */ 1776 bp->b_blkno = (finfo->cyl * (type->sectrac * type->heads) 1777 + finfo->head * type->sectrac) * FDC_BSIZE / DEV_BSIZE; 1778 1779 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 1780 bp->b_data = (caddr_t)finfo; 1781 1782 #ifdef FD_DEBUG 1783 if (fdc_debug) 1784 printf("fdformat: blkno %x count %lx\n", 1785 bp->b_blkno, bp->b_bcount); 1786 #endif 1787 1788 /* now do the format */ 1789 fdstrategy(bp); 1790 1791 /* ...and wait for it to complete */ 1792 s = splbio(); 1793 while (!(bp->b_flags & B_DONE)) { 1794 rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz); 1795 if (rv == EWOULDBLOCK) 1796 break; 1797 } 1798 splx(s); 1799 1800 if (rv == EWOULDBLOCK) { 1801 /* timed out */ 1802 rv = EIO; 1803 biodone(bp); 1804 } 1805 if (bp->b_flags & B_ERROR) { 1806 rv = bp->b_error; 1807 } 1808 PRELE(p); 1809 free(bp, M_TEMP); 1810 return (rv); 1811 } 1812 1813 void 1814 fdgetdisklabel(dev) 1815 dev_t dev; 1816 { 1817 int unit = FDUNIT(dev), i; 1818 struct fd_softc *fd = fd_cd.cd_devs[unit]; 1819 struct disklabel *lp = fd->sc_dk.dk_label; 1820 struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel; 1821 1822 bzero(lp, sizeof(struct disklabel)); 1823 bzero(lp, sizeof(struct cpu_disklabel)); 1824 1825 lp->d_type = DTYPE_FLOPPY; 1826 lp->d_secsize = FDC_BSIZE; 1827 lp->d_secpercyl = fd->sc_type->seccyl; 1828 lp->d_nsectors = fd->sc_type->sectrac; 1829 lp->d_ncylinders = fd->sc_type->tracks; 1830 lp->d_ntracks = fd->sc_type->heads; /* Go figure... */ 1831 lp->d_rpm = 3600; /* XXX like it matters... */ 1832 1833 strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename)); 1834 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 1835 lp->d_interleave = 1; 1836 1837 lp->d_partitions[RAW_PART].p_offset = 0; 1838 lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders; 1839 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1840 lp->d_npartitions = RAW_PART + 1; 1841 1842 lp->d_magic = DISKMAGIC; 1843 lp->d_magic2 = DISKMAGIC; 1844 lp->d_checksum = dkcksum(lp); 1845 1846 /* 1847 * Call the generic disklabel extraction routine. If there's 1848 * not a label there, fake it. 1849 */ 1850 if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) { 1851 strncpy(lp->d_packname, "default label", 1852 sizeof(lp->d_packname)); 1853 /* 1854 * Reset the partition info; it might have gotten 1855 * trashed in readdisklabel(). 1856 * 1857 * XXX Why do we have to do this? readdisklabel() 1858 * should be safe... 1859 */ 1860 for (i = 0; i < MAXPARTITIONS; ++i) { 1861 lp->d_partitions[i].p_offset = 0; 1862 if (i == RAW_PART) { 1863 lp->d_partitions[i].p_size = 1864 lp->d_secpercyl * lp->d_ncylinders; 1865 lp->d_partitions[i].p_fstype = FS_BSDFFS; 1866 } else { 1867 lp->d_partitions[i].p_size = 0; 1868 lp->d_partitions[i].p_fstype = FS_UNUSED; 1869 } 1870 } 1871 lp->d_npartitions = RAW_PART + 1; 1872 } 1873 } 1874 1875 void 1876 fd_do_eject(fdc, unit) 1877 struct fdc_softc *fdc; 1878 int unit; 1879 { 1880 fdc->sc_fcr |= FCR_DSEL(unit)|FCR_EJECT; 1881 FCR_REG_SYNC(); 1882 delay(10); 1883 fdc->sc_fcr &= ~(FCR_DSEL(unit)|FCR_EJECT); 1884 FCR_REG_SYNC(); 1885 } 1886 1887 #ifdef MEMORY_DISK_HOOKS 1888 int fd_read_md_image __P((size_t *, caddr_t *)); 1889 #endif 1890 1891 /* ARGSUSED */ 1892 void 1893 fd_mountroot_hook(dev) 1894 struct device *dev; 1895 { 1896 int c; 1897 1898 fd_do_eject(fdc_cd.cd_devs[0], 0); /* XXX - doesn't check ``dev'' */ 1899 printf("Insert filesystem floppy and press return."); 1900 for (;;) { 1901 c = cngetc(); 1902 if ((c == '\r') || (c == '\n')) { 1903 printf("\n"); 1904 break; 1905 } 1906 } 1907 #ifdef MEMORY_DISK_HOOKS 1908 { 1909 extern int (*md_read_image) __P((size_t *, caddr_t *)); 1910 md_read_image = fd_read_md_image; 1911 } 1912 #endif 1913 } 1914 1915 #ifdef MEMORY_DISK_HOOKS 1916 1917 #define FDMICROROOTSIZE ((2*18*80) << DEV_BSHIFT) 1918 1919 int 1920 fd_read_md_image(sizep, addrp) 1921 size_t *sizep; 1922 caddr_t *addrp; 1923 { 1924 struct buf buf, *bp = &buf; 1925 dev_t dev; 1926 off_t offset; 1927 caddr_t addr; 1928 1929 dev = makedev(54,0); /* XXX */ 1930 1931 MALLOC(addr, caddr_t, FDMICROROOTSIZE, M_DEVBUF, M_WAITOK); 1932 *addrp = addr; 1933 1934 if (fdopen(dev, 0, S_IFCHR, NULL)) 1935 panic("fd: mountroot: fdopen"); 1936 1937 offset = 0; 1938 1939 for (;;) { 1940 bp->b_dev = dev; 1941 bp->b_error = 0; 1942 bp->b_resid = 0; 1943 bp->b_proc = NULL; 1944 bp->b_flags = B_BUSY | B_PHYS | B_RAW | B_READ; 1945 bp->b_blkno = btodb(offset); 1946 bp->b_bcount = DEV_BSIZE; 1947 bp->b_data = addr; 1948 fdstrategy(bp); 1949 while ((bp->b_flags & B_DONE) == 0) { 1950 tsleep((caddr_t)bp, PRIBIO + 1, "physio", 0); 1951 } 1952 if (bp->b_error) 1953 panic("fd: mountroot: fdread error %d", bp->b_error); 1954 1955 if (bp->b_resid != 0) 1956 break; 1957 1958 addr += DEV_BSIZE; 1959 offset += DEV_BSIZE; 1960 if (offset + DEV_BSIZE > FDMICROROOTSIZE) 1961 break; 1962 } 1963 (void)fdclose(dev, 0, S_IFCHR, NULL); 1964 *sizep = offset; 1965 fd_do_eject(fdc_cd.cd_devs[0], FDUNIT(dev)); /* XXX */ 1966 return (0); 1967 } 1968 #endif 1969