1 /* $NetBSD: fd.c,v 1.4 1997/05/30 03:23:11 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((void *)); 241 int fdcswintr __P((void *)); 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 struct confargs *ca = aux; 280 281 if (bus_peek(ca->ca_bustype, ca->ca_paddr, sizeof(u_char)) == -1) 282 return (0); 283 284 return (1); 285 } 286 287 /* 288 * Arguments passed between fdcattach and fdprobe. 289 */ 290 struct fdc_attach_args { 291 int fa_drive; 292 struct bootpath *fa_bootpath; 293 struct fd_type *fa_deftype; 294 }; 295 296 /* 297 * Print the location of a disk drive (called just before attaching the 298 * the drive). If `fdc' is not NULL, the drive was found but was not 299 * in the system config file; print the drive name as well. 300 * Return QUIET (config_find ignores this if the device was configured) to 301 * avoid printing `fdN not configured' messages. 302 */ 303 int 304 fdprint(aux, fdc) 305 void *aux; 306 const char *fdc; 307 { 308 register struct fdc_attach_args *fa = aux; 309 310 if (!fdc) 311 printf(" drive %d", fa->fa_drive); 312 return (QUIET); 313 } 314 315 static void 316 fdconf(fdc) 317 struct fdc_softc *fdc; 318 { 319 int vroom; 320 321 if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10) 322 return; 323 324 /* 325 * dumpreg[7] seems to be a motor-off timeout; set it to whatever 326 * the PROM thinks is appropriate. 327 */ 328 if ((vroom = fdc->sc_status[7]) == 0) 329 vroom = 0x64; 330 331 /* Configure controller to use FIFO and Implied Seek */ 332 out_fdc(fdc, NE7CMD_CFG); 333 out_fdc(fdc, vroom); 334 out_fdc(fdc, fdc->sc_cfg); 335 out_fdc(fdc, 0); /* PRETRK */ 336 /* No result phase */ 337 } 338 339 void 340 fdcattach(parent, self, aux) 341 struct device *parent, *self; 342 void *aux; 343 { 344 register struct confargs *ca = aux; 345 struct fdc_softc *fdc = (void *)self; 346 struct fdc_attach_args fa; 347 int pri, vec; 348 char code; 349 350 fdc->sc_reg = (caddr_t)bus_mapin(ca->ca_bustype, ca->ca_paddr, 351 sizeof(union fdreg)); 352 353 fdc->sc_state = DEVIDLE; 354 fdc->sc_istate = ISTATE_IDLE; 355 fdc->sc_flags |= FDC_EIS; 356 TAILQ_INIT(&fdc->sc_drives); 357 358 /* Assume a 82072 */ 359 code = '2'; 360 361 if (code == '7') { 362 panic("no 82077 fdc in this kernel"); 363 /* NOTREACHED */ 364 } else { 365 fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr; 366 fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo; 367 368 fdc->sc_reg_fcr = ((volatile u_int8_t *) fdc->sc_reg) 369 + FDC_FCR_OFFSET; 370 fdc->sc_reg_fvr = ((volatile u_int8_t *) fdc->sc_reg) 371 + FDC_FVR_OFFSET; 372 } 373 374 isr_add_autovect(fdcswintr, fdc, FDC_SOFTPRI); 375 pri = ca->ca_intpri; 376 vec = ca->ca_intvec; 377 if (vec == -1) { 378 /* Tell the FDC to fake an autovector. */ 379 vec = 0x18 + pri; /* XXX */ 380 isr_add_autovect(fdchwintr, fdc, pri); 381 } else { 382 /* An OBIO bus with vectors? Weird exception. */ 383 isr_add_vectored(fdchwintr, fdc, pri, vec); 384 } 385 *fdc->sc_reg_fvr = vec; /* Program controller w/ interrupt vector */ 386 387 printf(": (softpri %d) chip 8207%c\n", FDC_SOFTPRI, code); 388 389 #ifdef FD_DEBUG 390 if (out_fdc(fdc, NE7CMD_VERSION) == 0 && 391 fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) { 392 if (fdc_debug) 393 printf("[version cmd]"); 394 } 395 #endif 396 397 fdc_reset(fdc); 398 /* 399 * Configure controller; enable FIFO, Implied seek, no POLL mode?. 400 * Note: CFG_EFIFO is active-low, initial threshold value: 8 401 */ 402 fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK); 403 fdconf(fdc); 404 405 evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt); 406 407 /* physical limit: four drives per controller. */ 408 for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) { 409 fa.fa_deftype = NULL; /* unknown */ 410 fa.fa_deftype = &fd_types[0]; /* XXX */ 411 (void)config_found(self, (void *)&fa, fdprint); 412 } 413 } 414 415 int 416 fdmatch(parent, match, aux) 417 struct device *parent; 418 struct cfdata *match; 419 void *aux; 420 { 421 struct fdc_softc *fdc = (void *)parent; 422 struct fdc_attach_args *fa = aux; 423 int drive = fa->fa_drive; 424 int n, ok; 425 426 if (drive > 0) 427 /* XXX - for now, punt > 1 drives */ 428 return (0); 429 430 /* select drive and turn on motor */ 431 fdc->sc_fcr |= FCR_DSEL(drive) | FCR_MTRON; 432 FCR_REG_SYNC(); 433 /* wait for motor to spin up */ 434 delay(250000); 435 436 fdc->sc_nstat = 0; 437 out_fdc(fdc, NE7CMD_RECAL); 438 out_fdc(fdc, drive); 439 /* wait for recalibrate */ 440 for (n = 0; n < 10000; n++) { 441 delay(1000); 442 if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) { 443 /* wait a bit longer till device *really* is ready */ 444 delay(100000); 445 if (out_fdc(fdc, NE7CMD_SENSEI)) 446 break; 447 if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80) 448 /* 449 * Got `invalid command'; we interpret it 450 * to mean that the re-calibrate hasn't in 451 * fact finished yet 452 */ 453 continue; 454 break; 455 } 456 } 457 n = fdc->sc_nstat; 458 #ifdef FD_DEBUG 459 if (fdc_debug) { 460 int i; 461 printf("fdprobe: %d stati:", n); 462 for (i = 0; i < n; i++) 463 printf(" %x", fdc->sc_status[i]); 464 printf("\n"); 465 } 466 #endif 467 ok = (n == 2 && (fdc->sc_status[0] & 0xf8) == 0x20) ? 1 : 0; 468 469 /* turn off motor */ 470 fdc->sc_fcr &= ~(FCR_DSEL(drive)|FCR_MTRON); 471 FCR_REG_SYNC(); 472 473 return (ok); 474 } 475 476 /* 477 * Controller is working, and drive responded. Attach it. 478 */ 479 void 480 fdattach(parent, self, aux) 481 struct device *parent, *self; 482 void *aux; 483 { 484 struct fdc_softc *fdc = (void *)parent; 485 struct fd_softc *fd = (void *)self; 486 struct fdc_attach_args *fa = aux; 487 struct fd_type *type = fa->fa_deftype; 488 int drive = fa->fa_drive; 489 490 /* XXX Allow `flags' to override device type? */ 491 492 if (type) 493 printf(": %s %d cyl, %d head, %d sec\n", type->name, 494 type->tracks, type->heads, type->sectrac); 495 else 496 printf(": density unknown\n"); 497 498 fd->sc_cylin = -1; 499 fd->sc_drive = drive; 500 fd->sc_deftype = type; 501 fdc->sc_fd[drive] = fd; 502 503 /* 504 * Initialize and attach the disk structure. 505 */ 506 fd->sc_dk.dk_name = fd->sc_dv.dv_xname; 507 fd->sc_dk.dk_driver = &fddkdriver; 508 disk_attach(&fd->sc_dk); 509 510 #ifdef sparc 511 /* 512 * We're told if we're the boot device in fdcattach(). 513 */ 514 if (fa->fa_bootpath) 515 fa->fa_bootpath->dev = &fd->sc_dv; 516 #endif 517 #define OUT_FDC(sc, c) { \ 518 if (out_fdc((sc), (c))) \ 519 printf("fdc: specify command failed.\n");\ 520 } 521 /* specify command */ 522 OUT_FDC(fdc, NE7CMD_SPECIFY); 523 OUT_FDC(fdc, type->steprate); 524 /* 525 * The '|1' in the following statement turns on the 'Non-DMA' bit 526 * specifier in the last byte of the SPECIFY command as described in the 527 * datasheet I have. This is necessary for the driver to work on the 528 * sun3x, because the system will not respond to the chip's requests 529 * for DMA; there is no hardware on the motherboard to support it. 530 * By enabling this bit, we will force the chip to interrupt when its 531 * FIFO is full, at which point the interrupt handler will empty it and 532 * continue. This is ``pseudo-DMA''. 533 * -J 534 */ 535 OUT_FDC(fdc, 6|1); /* XXX head load time == 6ms */ 536 #undef OUT_FDC 537 538 /* 539 * Establish a mountroot_hook anyway in case we booted 540 * with RB_ASKNAME and get selected as the boot device. 541 */ 542 mountroothook_establish(fd_mountroot_hook, &fd->sc_dv); 543 544 /* Make sure the drive motor gets turned off at shutdown time. */ 545 fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd); 546 547 /* XXX Need to do some more fiddling with sc_dk. */ 548 dk_establish(&fd->sc_dk, &fd->sc_dv); 549 } 550 551 __inline struct fd_type * 552 fd_dev_to_type(fd, dev) 553 struct fd_softc *fd; 554 dev_t dev; 555 { 556 int type = FDTYPE(dev); 557 558 if (type > (sizeof(fd_types) / sizeof(fd_types[0]))) 559 return (NULL); 560 return (type ? &fd_types[type - 1] : fd->sc_deftype); 561 } 562 563 void 564 fdstrategy(bp) 565 register struct buf *bp; /* IO operation to perform */ 566 { 567 struct fd_softc *fd; 568 int unit = FDUNIT(bp->b_dev); 569 int sz; 570 int s; 571 572 /* Valid unit, controller, and request? */ 573 if (unit >= fd_cd.cd_ndevs || 574 (fd = fd_cd.cd_devs[unit]) == 0 || 575 bp->b_blkno < 0 || 576 ((bp->b_bcount % FDC_BSIZE) != 0 && 577 (bp->b_flags & B_FORMAT) == 0)) { 578 bp->b_error = EINVAL; 579 goto bad; 580 } 581 582 /* If it's a null transfer, return immediately. */ 583 if (bp->b_bcount == 0) 584 goto done; 585 586 sz = howmany(bp->b_bcount, FDC_BSIZE); 587 588 if (bp->b_blkno + sz > fd->sc_type->size) { 589 sz = fd->sc_type->size - bp->b_blkno; 590 if (sz == 0) { 591 /* If exactly at end of disk, return EOF. */ 592 bp->b_resid = bp->b_bcount; 593 goto done; 594 } 595 if (sz < 0) { 596 /* If past end of disk, return EINVAL. */ 597 bp->b_error = EINVAL; 598 goto bad; 599 } 600 /* Otherwise, truncate request. */ 601 bp->b_bcount = sz << DEV_BSHIFT; 602 } 603 604 bp->b_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl; 605 606 #ifdef FD_DEBUG 607 if (fdc_debug > 1) 608 printf("fdstrategy: b_blkno %d b_bcount %ld blkno %d cylin %ld\n", 609 bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin); 610 #endif 611 612 /* Queue transfer on drive, activate drive and controller if idle. */ 613 s = splbio(); 614 disksort(&fd->sc_q, bp); 615 untimeout(fd_motor_off, fd); /* a good idea */ 616 if (!fd->sc_q.b_active) 617 fdstart(fd); 618 #ifdef DIAGNOSTIC 619 else { 620 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 621 if (fdc->sc_state == DEVIDLE) { 622 printf("fdstrategy: controller inactive\n"); 623 fdcstart(fdc); 624 } 625 } 626 #endif 627 splx(s); 628 return; 629 630 bad: 631 bp->b_flags |= B_ERROR; 632 done: 633 /* Toss transfer; we're done early. */ 634 biodone(bp); 635 } 636 637 void 638 fdstart(fd) 639 struct fd_softc *fd; 640 { 641 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 642 int active = fdc->sc_drives.tqh_first != 0; 643 644 /* Link into controller queue. */ 645 fd->sc_q.b_active = 1; 646 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 647 648 /* If controller not already active, start it. */ 649 if (!active) 650 fdcstart(fdc); 651 } 652 653 void 654 fdfinish(fd, bp) 655 struct fd_softc *fd; 656 struct buf *bp; 657 { 658 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 659 660 /* 661 * Move this drive to the end of the queue to give others a `fair' 662 * chance. We only force a switch if N operations are completed while 663 * another drive is waiting to be serviced, since there is a long motor 664 * startup delay whenever we switch. 665 */ 666 if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) { 667 fd->sc_ops = 0; 668 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 669 if (bp->b_actf) { 670 TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain); 671 } else 672 fd->sc_q.b_active = 0; 673 } 674 bp->b_resid = fd->sc_bcount; 675 fd->sc_skip = 0; 676 fd->sc_q.b_actf = bp->b_actf; 677 678 biodone(bp); 679 /* turn off motor 5s from now */ 680 timeout(fd_motor_off, fd, 5 * hz); 681 fdc->sc_state = DEVIDLE; 682 } 683 684 void 685 fdc_reset(fdc) 686 struct fdc_softc *fdc; 687 { 688 fdc->sc_fcr = 0; 689 FCR_REG_SYNC(); 690 691 *fdc->sc_reg_drs = DRS_RESET; 692 delay(10); 693 *fdc->sc_reg_drs = 0; 694 695 #ifdef FD_DEBUG 696 if (fdc_debug) 697 printf("fdc reset\n"); 698 #endif 699 } 700 701 void 702 fd_set_motor(fdc) 703 struct fdc_softc *fdc; 704 { 705 struct fd_softc *fd; 706 int n; 707 708 int on = 0; 709 710 for (n = 0; n < 4; n++) 711 if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) 712 on = 1; 713 if (on) { 714 fdc->sc_fcr |= FCR_DSEL(0)|FCR_MTRON; /* XXX */ 715 } else { 716 fdc->sc_fcr &= ~(FCR_DSEL(0)|FCR_MTRON); /* XXX */ 717 } 718 FCR_REG_SYNC(); 719 } 720 721 void 722 fd_motor_off(arg) 723 void *arg; 724 { 725 struct fd_softc *fd = arg; 726 int s; 727 728 s = splbio(); 729 fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 730 fd_set_motor((struct fdc_softc *)fd->sc_dv.dv_parent); 731 splx(s); 732 } 733 734 void 735 fd_motor_on(arg) 736 void *arg; 737 { 738 struct fd_softc *fd = arg; 739 struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent; 740 int s; 741 742 s = splbio(); 743 fd->sc_flags &= ~FD_MOTOR_WAIT; 744 if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT)) 745 (void) fdcstate(fdc); 746 splx(s); 747 } 748 749 int 750 fdcresult(fdc) 751 struct fdc_softc *fdc; 752 { 753 u_char i; 754 int j = 100000, 755 n = 0; 756 757 for (; j; j--) { 758 i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB); 759 if (i == NE7_RQM) 760 return (fdc->sc_nstat = n); 761 if (i == (NE7_DIO | NE7_RQM | NE7_CB)) { 762 if (n >= sizeof(fdc->sc_status)) { 763 log(LOG_ERR, "fdcresult: overrun\n"); 764 return (-1); 765 } 766 fdc->sc_status[n++] = *fdc->sc_reg_fifo; 767 } else 768 delay(10); 769 } 770 log(LOG_ERR, "fdcresult: timeout\n"); 771 return (fdc->sc_nstat = -1); 772 } 773 774 int 775 out_fdc(fdc, x) 776 struct fdc_softc *fdc; 777 u_char x; 778 { 779 int i = 100000; 780 781 while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0) 782 delay(1); 783 if (i <= 0) 784 return (-1); 785 786 *fdc->sc_reg_fifo = x; 787 return (0); 788 } 789 790 int 791 fdopen(dev, flags, fmt, p) 792 dev_t dev; 793 int flags, fmt; 794 struct proc *p; 795 { 796 int unit, pmask; 797 struct fd_softc *fd; 798 struct fd_type *type; 799 800 unit = FDUNIT(dev); 801 if (unit >= fd_cd.cd_ndevs) 802 return (ENXIO); 803 fd = fd_cd.cd_devs[unit]; 804 if (fd == 0) 805 return (ENXIO); 806 type = fd_dev_to_type(fd, dev); 807 if (type == NULL) 808 return (ENXIO); 809 810 if ((fd->sc_flags & FD_OPEN) != 0 && 811 fd->sc_type != type) 812 return (EBUSY); 813 814 fd->sc_type = type; 815 fd->sc_cylin = -1; 816 fd->sc_flags |= FD_OPEN; 817 818 /* 819 * Only update the disklabel if we're not open anywhere else. 820 */ 821 if (fd->sc_dk.dk_openmask == 0) 822 fdgetdisklabel(dev); 823 824 pmask = (1 << DISKPART(dev)); 825 826 switch (fmt) { 827 case S_IFCHR: 828 fd->sc_dk.dk_copenmask |= pmask; 829 break; 830 831 case S_IFBLK: 832 fd->sc_dk.dk_bopenmask |= pmask; 833 break; 834 } 835 fd->sc_dk.dk_openmask = 836 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 837 838 return (0); 839 } 840 841 int 842 fdclose(dev, flags, fmt, p) 843 dev_t dev; 844 int flags, fmt; 845 struct proc *p; 846 { 847 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 848 int pmask = (1 << DISKPART(dev)); 849 850 fd->sc_flags &= ~FD_OPEN; 851 fd->sc_opts &= ~(FDOPT_NORETRY|FDOPT_SILENT); 852 853 switch (fmt) { 854 case S_IFCHR: 855 fd->sc_dk.dk_copenmask &= ~pmask; 856 break; 857 858 case S_IFBLK: 859 fd->sc_dk.dk_bopenmask &= ~pmask; 860 break; 861 } 862 fd->sc_dk.dk_openmask = 863 fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask; 864 865 return (0); 866 } 867 868 int 869 fdread(dev, uio, flag) 870 dev_t dev; 871 struct uio *uio; 872 int flag; 873 { 874 875 return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio)); 876 } 877 878 int 879 fdwrite(dev, uio, flag) 880 dev_t dev; 881 struct uio *uio; 882 int flag; 883 { 884 885 return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio)); 886 } 887 888 void 889 fdcstart(fdc) 890 struct fdc_softc *fdc; 891 { 892 893 #ifdef DIAGNOSTIC 894 /* only got here if controller's drive queue was inactive; should 895 be in idle state */ 896 if (fdc->sc_state != DEVIDLE) { 897 printf("fdcstart: not idle\n"); 898 return; 899 } 900 #endif 901 (void) fdcstate(fdc); 902 } 903 904 void 905 fdcstatus(dv, n, s) 906 struct device *dv; 907 int n; 908 char *s; 909 { 910 struct fdc_softc *fdc = (void *)dv->dv_parent; 911 char bits[64]; 912 #if 0 913 /* 914 * A 82072 seems to return <invalid command> on 915 * gratuitous Sense Interrupt commands. 916 */ 917 if (n == 0 && (fdc->sc_flags & FDC_82077)) { 918 out_fdc(fdc, NE7CMD_SENSEI); 919 (void) fdcresult(fdc); 920 n = 2; 921 } 922 #endif 923 924 /* Just print last status */ 925 n = fdc->sc_nstat; 926 927 printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state); 928 929 switch (n) { 930 case 0: 931 printf("\n"); 932 break; 933 case 2: 934 printf(" (st0 %s cyl %d)\n", 935 bitmask_snprintf(fdc->sc_status[0], NE7_ST0BITS, 936 bits, sizeof(bits)), fdc->sc_status[1]); 937 break; 938 case 7: 939 printf(" (st0 %s", bitmask_snprintf(fdc->sc_status[0], 940 NE7_ST0BITS, bits, sizeof(bits))); 941 printf(" st1 %s", bitmask_snprintf(fdc->sc_status[1], 942 NE7_ST1BITS, bits, sizeof(bits))); 943 printf(" st2 %s", bitmask_snprintf(fdc->sc_status[2], 944 NE7_ST2BITS, bits, sizeof(bits))); 945 printf(" cyl %d head %d sec %d)\n", 946 fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]); 947 break; 948 #ifdef DIAGNOSTIC 949 default: 950 printf(" fdcstatus: weird size: %d\n", n); 951 break; 952 #endif 953 } 954 } 955 956 void 957 fdctimeout(arg) 958 void *arg; 959 { 960 struct fdc_softc *fdc = arg; 961 struct fd_softc *fd = fdc->sc_drives.tqh_first; 962 int s; 963 964 s = splbio(); 965 fdcstatus(&fd->sc_dv, 0, "timeout"); 966 967 if (fd->sc_q.b_actf) 968 fdc->sc_state++; 969 else 970 fdc->sc_state = DEVIDLE; 971 972 (void) fdcstate(fdc); 973 splx(s); 974 } 975 976 void 977 fdcpseudointr(arg) 978 void *arg; 979 { 980 struct fdc_softc *fdc = arg; 981 int s; 982 983 /* Just ensure it has the right spl. */ 984 s = splbio(); 985 (void) fdcstate(fdc); 986 splx(s); 987 } 988 989 990 /* 991 * hardware interrupt entry point: must be converted to `fast' 992 * (in-window) handler. 993 */ 994 int 995 fdchwintr(arg) 996 void *arg; 997 { 998 struct fdc_softc *fdc = arg; 999 1000 /* 1001 * This code was reverse engineered from the SPARC bsd_fdintr.s. 1002 */ 1003 switch (fdc->sc_istate) { 1004 case ISTATE_IDLE: 1005 return (0); 1006 case ISTATE_SENSEI: 1007 out_fdc(fdc, NE7CMD_SENSEI); 1008 fdcresult(fdc); 1009 fdc->sc_istate = ISTATE_DONE; 1010 FD_SET_SWINTR(); 1011 return (1); 1012 case ISTATE_DMA: 1013 break; 1014 default: 1015 log(LOG_ERR, "fdc: stray hard interrupt.\n"); 1016 fdc->sc_fcr &= ~(FCR_DSEL(0)); /* Does this help? */ 1017 fdc->sc_istate = ISTATE_SPURIOUS; 1018 FD_SET_SWINTR(); 1019 return (1); 1020 } 1021 1022 for (;;) { 1023 register int msr; 1024 1025 msr = *fdc->sc_reg_msr; 1026 1027 if ((msr & NE7_RQM) == 0) 1028 break; 1029 1030 if ((msr & NE7_NDM) == 0) { 1031 fdcresult(fdc); 1032 fdc->sc_istate = ISTATE_DONE; 1033 FD_SET_SWINTR(); 1034 log(LOG_ERR, "fdc: overrun: tc = %d\n", fdc->sc_tc); 1035 break; 1036 } 1037 1038 if (msr & NE7_DIO) { 1039 *fdc->sc_data++ = *fdc->sc_reg_fifo; 1040 } else { 1041 *fdc->sc_reg_fifo = *fdc->sc_data++; 1042 } 1043 if (--fdc->sc_tc == 0) { 1044 fdc->sc_fcr |= FCR_TC; 1045 FCR_REG_SYNC(); 1046 fdc->sc_istate = ISTATE_DONE; 1047 delay(10); 1048 fdc->sc_fcr &= ~FCR_TC; 1049 FCR_REG_SYNC(); 1050 fdcresult(fdc); 1051 FD_SET_SWINTR(); 1052 break; 1053 } 1054 } 1055 return (1); 1056 } 1057 1058 int 1059 fdcswintr(arg) 1060 void *arg; 1061 { 1062 struct fdc_softc *fdc = arg; 1063 int s; 1064 1065 if (fdc_softpend == 0) 1066 return (0); 1067 1068 isr_soft_clear(FDC_SOFTPRI); 1069 fdc_softpend = 0; 1070 1071 if (fdc->sc_istate != ISTATE_DONE) 1072 return (0); 1073 1074 fdc->sc_istate = ISTATE_IDLE; 1075 s = splbio(); 1076 fdcstate(fdc); 1077 splx(s); 1078 return (1); 1079 } 1080 1081 int 1082 fdcstate(fdc) 1083 struct fdc_softc *fdc; 1084 { 1085 #define st0 fdc->sc_status[0] 1086 #define st1 fdc->sc_status[1] 1087 #define cyl fdc->sc_status[1] 1088 #define OUT_FDC(fdc, c, s) \ 1089 do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0) 1090 1091 struct fd_softc *fd; 1092 struct buf *bp; 1093 int read, head, sec, nblks; 1094 struct fd_type *type; 1095 struct ne7_fd_formb *finfo = NULL; 1096 1097 1098 if (fdc->sc_istate != ISTATE_IDLE) { 1099 /* Trouble... */ 1100 printf("fdc: spurious interrupt: state %d, istate=%d\n", 1101 fdc->sc_state, fdc->sc_istate); 1102 fdc->sc_istate = ISTATE_IDLE; 1103 if (fdc->sc_state == RESETCOMPLETE || 1104 fdc->sc_state == RESETTIMEDOUT) { 1105 panic("fdcintr: spurious interrupt can't be cleared"); 1106 } 1107 goto doreset; 1108 } 1109 1110 loop: 1111 /* Is there a drive for the controller to do a transfer with? */ 1112 fd = fdc->sc_drives.tqh_first; 1113 if (fd == NULL) { 1114 fdc->sc_state = DEVIDLE; 1115 return (0); 1116 } 1117 1118 /* Is there a transfer to this drive? If not, deactivate drive. */ 1119 bp = fd->sc_q.b_actf; 1120 if (bp == NULL) { 1121 fd->sc_ops = 0; 1122 TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain); 1123 fd->sc_q.b_active = 0; 1124 goto loop; 1125 } 1126 1127 if (bp->b_flags & B_FORMAT) 1128 finfo = (struct ne7_fd_formb *)bp->b_data; 1129 1130 switch (fdc->sc_state) { 1131 case DEVIDLE: 1132 fdc->sc_errors = 0; 1133 fd->sc_skip = 0; 1134 fd->sc_bcount = bp->b_bcount; 1135 fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE); 1136 untimeout(fd_motor_off, fd); 1137 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) { 1138 fdc->sc_state = MOTORWAIT; 1139 return (1); 1140 } 1141 if ((fd->sc_flags & FD_MOTOR) == 0) { 1142 /* Turn on the motor, being careful about pairing. */ 1143 struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1]; 1144 if (ofd && ofd->sc_flags & FD_MOTOR) { 1145 untimeout(fd_motor_off, ofd); 1146 ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT); 1147 } 1148 fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT; 1149 fd_set_motor(fdc); 1150 fdc->sc_state = MOTORWAIT; 1151 if (fdc->sc_flags & FDC_82077) { /* XXX */ 1152 /* Allow .25s for motor to stabilize. */ 1153 timeout(fd_motor_on, fd, hz / 4); 1154 } else { 1155 fd->sc_flags &= ~FD_MOTOR_WAIT; 1156 goto loop; 1157 } 1158 return (1); 1159 } 1160 /* Make sure the right drive is selected. */ 1161 fd_set_motor(fdc); 1162 1163 /*FALLTHROUGH*/ 1164 case DOSEEK: 1165 doseek: 1166 if ((fdc->sc_flags & FDC_EIS) && 1167 (bp->b_flags & B_FORMAT) == 0) { 1168 fd->sc_cylin = bp->b_cylin; 1169 /* We use implied seek */ 1170 goto doio; 1171 } 1172 1173 if (fd->sc_cylin == bp->b_cylin) 1174 goto doio; 1175 1176 /* specify command */ 1177 OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT); 1178 OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT); 1179 OUT_FDC(fdc, 6|1, SEEKTIMEDOUT); /* XXX head load time == 6ms */ 1180 1181 fdc->sc_istate = ISTATE_SENSEI; 1182 /* seek function */ 1183 OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT); 1184 OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */ 1185 OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT); 1186 1187 fd->sc_cylin = -1; 1188 fdc->sc_state = SEEKWAIT; 1189 fdc->sc_nstat = 0; 1190 1191 fd->sc_dk.dk_seek++; 1192 disk_busy(&fd->sc_dk); 1193 1194 timeout(fdctimeout, fdc, 4 * hz); 1195 return (1); 1196 1197 case DOIO: 1198 doio: 1199 #ifdef NOTYET 1200 /* Check to see if the disk has changed */ 1201 if (fdc->sc_reg_dir & FDI_DCHG) { 1202 /* 1203 * The disk in the drive has changed since 1204 * the last transfer. We need to see if its geometry 1205 * has changed. 1206 */ 1207 } 1208 #endif /* NOTYET */ 1209 1210 if (finfo) 1211 fd->sc_skip = (char *)&(finfo->fd_formb_cylno(0)) - 1212 (char *)finfo; 1213 type = fd->sc_type; 1214 sec = fd->sc_blkno % type->seccyl; 1215 nblks = type->seccyl - sec; 1216 nblks = min(nblks, fd->sc_bcount / FDC_BSIZE); 1217 nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE); 1218 fd->sc_nblks = nblks; 1219 fd->sc_nbytes = finfo ? bp->b_bcount : nblks * FDC_BSIZE; 1220 head = sec / type->sectrac; 1221 sec -= head * type->sectrac; 1222 #ifdef DIAGNOSTIC 1223 {int block; 1224 block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec; 1225 if (block != fd->sc_blkno) { 1226 printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno); 1227 #ifdef DDB 1228 Debugger(); 1229 #endif 1230 }} 1231 #endif 1232 read = bp->b_flags & B_READ; 1233 1234 /* Setup for pseudo DMA */ 1235 fdc->sc_data = bp->b_data + fd->sc_skip; 1236 fdc->sc_tc = fd->sc_nbytes; 1237 1238 *fdc->sc_reg_drs = type->rate; 1239 #ifdef FD_DEBUG 1240 if (fdc_debug > 1) 1241 printf("fdcintr: %s drive %d track %d head %d sec %d nblks %d\n", 1242 read ? "read" : "write", fd->sc_drive, 1243 fd->sc_cylin, head, sec, nblks); 1244 #endif 1245 fdc->sc_state = IOCOMPLETE; 1246 fdc->sc_istate = ISTATE_DMA; 1247 fdc->sc_nstat = 0; 1248 if (finfo) { 1249 /* formatting */ 1250 OUT_FDC(fdc, NE7CMD_FORMAT, IOTIMEDOUT); 1251 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1252 OUT_FDC(fdc, finfo->fd_formb_secshift, IOTIMEDOUT); 1253 OUT_FDC(fdc, finfo->fd_formb_nsecs, IOTIMEDOUT); 1254 OUT_FDC(fdc, finfo->fd_formb_gaplen, IOTIMEDOUT); 1255 OUT_FDC(fdc, finfo->fd_formb_fillbyte, IOTIMEDOUT); 1256 } else { 1257 if (read) 1258 OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); 1259 else 1260 OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); 1261 OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT); 1262 OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /*track*/ 1263 OUT_FDC(fdc, head, IOTIMEDOUT); 1264 OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /*sector+1*/ 1265 OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/*sector size*/ 1266 OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/*secs/track*/ 1267 OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /*gap1 size*/ 1268 OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/*data length*/ 1269 } 1270 1271 disk_busy(&fd->sc_dk); 1272 1273 /* allow 2 seconds for operation */ 1274 timeout(fdctimeout, fdc, 2 * hz); 1275 return (1); /* will return later */ 1276 1277 case SEEKWAIT: 1278 untimeout(fdctimeout, fdc); 1279 fdc->sc_state = SEEKCOMPLETE; 1280 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1281 /* allow 1/50 second for heads to settle */ 1282 timeout(fdcpseudointr, fdc, hz / 50); 1283 return (1); /* will return later */ 1284 } 1285 /*FALLTHROUGH*/ 1286 case SEEKCOMPLETE: 1287 disk_unbusy(&fd->sc_dk, 0); /* no data on seek */ 1288 1289 /* Make sure seek really happened. */ 1290 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || 1291 cyl != bp->b_cylin * fd->sc_type->step) { 1292 #ifdef FD_DEBUG 1293 if (fdc_debug) 1294 fdcstatus(&fd->sc_dv, 2, "seek failed"); 1295 #endif 1296 fdcretry(fdc); 1297 goto loop; 1298 } 1299 fd->sc_cylin = bp->b_cylin; 1300 goto doio; 1301 1302 case IOTIMEDOUT: 1303 fdc->sc_fcr |= FCR_TC; 1304 FCR_REG_SYNC(); 1305 delay(10); 1306 fdc->sc_fcr &= ~FCR_TC; 1307 FCR_REG_SYNC(); 1308 (void)fdcresult(fdc); 1309 /*FALLTHROUGH*/ 1310 case SEEKTIMEDOUT: 1311 case RECALTIMEDOUT: 1312 case RESETTIMEDOUT: 1313 fdcretry(fdc); 1314 goto loop; 1315 1316 case IOCOMPLETE: /* IO DONE, post-analyze */ 1317 untimeout(fdctimeout, fdc); 1318 1319 disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid)); 1320 1321 if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) { 1322 #ifdef FD_DEBUG 1323 if (fdc_debug) { 1324 fdcstatus(&fd->sc_dv, 7, 1325 bp->b_flags & B_READ 1326 ? "read failed" : "write failed"); 1327 printf("blkno %d nblks %d tc %d\n", 1328 fd->sc_blkno, fd->sc_nblks, fdc->sc_tc); 1329 } 1330 #endif 1331 if (fdc->sc_nstat == 7 && 1332 (st1 & ST1_OVERRUN) == ST1_OVERRUN) { 1333 1334 /* 1335 * Silently retry overruns if no other 1336 * error bit is set. Adjust threshold. 1337 */ 1338 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1339 if (thr < 15) { 1340 thr++; 1341 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1342 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1343 #ifdef FD_DEBUG 1344 if (fdc_debug) 1345 printf("fdc: %d -> threshold\n", thr); 1346 #endif 1347 fdconf(fdc); 1348 fdc->sc_overruns = 0; 1349 } 1350 if (++fdc->sc_overruns < 3) { 1351 fdc->sc_state = DOIO; 1352 goto loop; 1353 } 1354 } 1355 fdcretry(fdc); 1356 goto loop; 1357 } 1358 if (fdc->sc_errors) { 1359 diskerr(bp, "fd", "soft error", LOG_PRINTF, 1360 fd->sc_skip / FDC_BSIZE, (struct disklabel *)NULL); 1361 printf("\n"); 1362 fdc->sc_errors = 0; 1363 } else { 1364 if (--fdc->sc_overruns < -20) { 1365 int thr = fdc->sc_cfg & CFG_THRHLD_MASK; 1366 if (thr > 0) { 1367 thr--; 1368 fdc->sc_cfg &= ~CFG_THRHLD_MASK; 1369 fdc->sc_cfg |= (thr & CFG_THRHLD_MASK); 1370 #ifdef FD_DEBUG 1371 if (fdc_debug) 1372 printf("fdc: %d -> threshold\n", thr); 1373 #endif 1374 fdconf(fdc); 1375 } 1376 fdc->sc_overruns = 0; 1377 } 1378 } 1379 fd->sc_blkno += fd->sc_nblks; 1380 fd->sc_skip += fd->sc_nbytes; 1381 fd->sc_bcount -= fd->sc_nbytes; 1382 if (!finfo && fd->sc_bcount > 0) { 1383 bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl; 1384 goto doseek; 1385 } 1386 fdfinish(fd, bp); 1387 goto loop; 1388 1389 case DORESET: 1390 doreset: 1391 /* try a reset, keep motor on */ 1392 fd_set_motor(fdc); 1393 delay(100); 1394 fdc_reset(fdc); 1395 fdc->sc_nstat = 0; 1396 fdc->sc_istate = ISTATE_SENSEI; 1397 fdc->sc_state = RESETCOMPLETE; 1398 timeout(fdctimeout, fdc, hz / 2); 1399 return (1); /* will return later */ 1400 1401 case RESETCOMPLETE: 1402 untimeout(fdctimeout, fdc); 1403 fdconf(fdc); 1404 1405 /* fall through */ 1406 case DORECAL: 1407 fdc->sc_state = RECALWAIT; 1408 fdc->sc_istate = ISTATE_SENSEI; 1409 fdc->sc_nstat = 0; 1410 /* recalibrate function */ 1411 OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT); 1412 OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT); 1413 timeout(fdctimeout, fdc, 5 * hz); 1414 return (1); /* will return later */ 1415 1416 case RECALWAIT: 1417 untimeout(fdctimeout, fdc); 1418 fdc->sc_state = RECALCOMPLETE; 1419 if (fdc->sc_flags & FDC_NEEDHEADSETTLE) { 1420 /* allow 1/30 second for heads to settle */ 1421 timeout(fdcpseudointr, fdc, hz / 30); 1422 return (1); /* will return later */ 1423 } 1424 1425 case RECALCOMPLETE: 1426 if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) { 1427 #ifdef FD_DEBUG 1428 if (fdc_debug) 1429 fdcstatus(&fd->sc_dv, 2, "recalibrate failed"); 1430 #endif 1431 fdcretry(fdc); 1432 goto loop; 1433 } 1434 fd->sc_cylin = 0; 1435 goto doseek; 1436 1437 case MOTORWAIT: 1438 if (fd->sc_flags & FD_MOTOR_WAIT) 1439 return (1); /* time's not up yet */ 1440 goto doseek; 1441 1442 default: 1443 fdcstatus(&fd->sc_dv, 0, "stray interrupt"); 1444 return (1); 1445 } 1446 #ifdef DIAGNOSTIC 1447 panic("fdcintr: impossible"); 1448 #endif 1449 #undef st0 1450 #undef st1 1451 #undef cyl 1452 } 1453 1454 void 1455 fdcretry(fdc) 1456 struct fdc_softc *fdc; 1457 { 1458 char bits[64]; 1459 struct fd_softc *fd; 1460 struct buf *bp; 1461 1462 fd = fdc->sc_drives.tqh_first; 1463 bp = fd->sc_q.b_actf; 1464 1465 fdc->sc_overruns = 0; 1466 if (fd->sc_opts & FDOPT_NORETRY) 1467 goto fail; 1468 1469 switch (fdc->sc_errors) { 1470 case 0: 1471 /* try again */ 1472 fdc->sc_state = 1473 (fdc->sc_flags & FDC_EIS) ? DOIO : DOSEEK; 1474 break; 1475 1476 case 1: case 2: case 3: 1477 /* didn't work; try recalibrating */ 1478 fdc->sc_state = DORECAL; 1479 break; 1480 1481 case 4: 1482 /* still no go; reset the bastard */ 1483 fdc->sc_state = DORESET; 1484 break; 1485 1486 default: 1487 fail: 1488 if ((fd->sc_opts & FDOPT_SILENT) == 0) { 1489 diskerr(bp, "fd", "hard error", LOG_PRINTF, 1490 fd->sc_skip / FDC_BSIZE, 1491 (struct disklabel *)NULL); 1492 1493 printf(" (st0 %s", bitmask_snprintf(fdc->sc_status[0], 1494 NE7_ST0BITS, bits, sizeof(bits))); 1495 printf(" st1 %s", bitmask_snprintf(fdc->sc_status[1], 1496 NE7_ST1BITS, bits, sizeof(bits))); 1497 printf(" st2 %s", bitmask_snprintf(fdc->sc_status[2], 1498 NE7_ST2BITS, bits, sizeof(bits))); 1499 printf(" cyl %d head %d sec %d)\n", 1500 fdc->sc_status[3], fdc->sc_status[4], 1501 fdc->sc_status[5]); 1502 } 1503 1504 bp->b_flags |= B_ERROR; 1505 bp->b_error = EIO; 1506 fdfinish(fd, bp); 1507 } 1508 fdc->sc_errors++; 1509 } 1510 1511 int 1512 fdsize(dev) 1513 dev_t dev; 1514 { 1515 1516 /* Swapping to floppies would not make sense. */ 1517 return (-1); 1518 } 1519 1520 int 1521 fddump(dev, blkno, va, size) 1522 dev_t dev; 1523 daddr_t blkno; 1524 caddr_t va; 1525 size_t size; 1526 { 1527 1528 /* Not implemented. */ 1529 return (EINVAL); 1530 } 1531 1532 int 1533 fdioctl(dev, cmd, addr, flag, p) 1534 dev_t dev; 1535 u_long cmd; 1536 caddr_t addr; 1537 int flag; 1538 struct proc *p; 1539 { 1540 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 1541 struct fdformat_parms *form_parms; 1542 struct fdformat_cmd *form_cmd; 1543 struct ne7_fd_formb fd_formb; 1544 int il[FD_MAX_NSEC + 1]; 1545 int i, j; 1546 int error; 1547 1548 switch (cmd) { 1549 case DIOCGDINFO: 1550 *(struct disklabel *)addr = *(fd->sc_dk.dk_label); 1551 return 0; 1552 1553 case DIOCWLABEL: 1554 if ((flag & FWRITE) == 0) 1555 return EBADF; 1556 /* XXX do something */ 1557 return (0); 1558 1559 case DIOCWDINFO: 1560 if ((flag & FWRITE) == 0) 1561 return (EBADF); 1562 1563 error = setdisklabel(fd->sc_dk.dk_label, 1564 (struct disklabel *)addr, 0, 1565 fd->sc_dk.dk_cpulabel); 1566 if (error) 1567 return (error); 1568 1569 error = writedisklabel(dev, fdstrategy, 1570 fd->sc_dk.dk_label, 1571 fd->sc_dk.dk_cpulabel); 1572 return (error); 1573 1574 case DIOCLOCK: 1575 /* 1576 * Nothing to do here, really. 1577 */ 1578 return (0); 1579 1580 case DIOCEJECT: 1581 fd_do_eject((void *)fd->sc_dv.dv_parent, fd->sc_drive); 1582 return (0); 1583 1584 case FDIOCGETFORMAT: 1585 form_parms = (struct fdformat_parms *)addr; 1586 form_parms->fdformat_version = FDFORMAT_VERSION; 1587 form_parms->nbps = 128 * (1 << fd->sc_type->secsize); 1588 form_parms->ncyl = fd->sc_type->tracks; 1589 form_parms->nspt = fd->sc_type->sectrac; 1590 form_parms->ntrk = fd->sc_type->heads; 1591 form_parms->stepspercyl = fd->sc_type->step; 1592 form_parms->gaplen = fd->sc_type->gap2; 1593 form_parms->fillbyte = fd->sc_type->fillbyte; 1594 form_parms->interleave = fd->sc_type->interleave; 1595 switch (fd->sc_type->rate) { 1596 case FDC_500KBPS: 1597 form_parms->xfer_rate = 500 * 1024; 1598 break; 1599 case FDC_300KBPS: 1600 form_parms->xfer_rate = 300 * 1024; 1601 break; 1602 case FDC_250KBPS: 1603 form_parms->xfer_rate = 250 * 1024; 1604 break; 1605 default: 1606 return (EINVAL); 1607 } 1608 return (0); 1609 1610 case FDIOCSETFORMAT: 1611 if ((flag & FWRITE) == 0) 1612 return (EBADF); /* must be opened for writing */ 1613 1614 form_parms = (struct fdformat_parms *)addr; 1615 if (form_parms->fdformat_version != FDFORMAT_VERSION) 1616 return (EINVAL);/* wrong version of formatting prog */ 1617 1618 i = form_parms->nbps >> 7; 1619 if ((form_parms->nbps & 0x7f) || ffs(i) == 0 || 1620 i & ~(1 << (ffs(i)-1))) 1621 /* not a power-of-two multiple of 128 */ 1622 return (EINVAL); 1623 1624 switch (form_parms->xfer_rate) { 1625 case 500 * 1024: 1626 fd->sc_type->rate = FDC_500KBPS; 1627 break; 1628 case 300 * 1024: 1629 fd->sc_type->rate = FDC_300KBPS; 1630 break; 1631 case 250 * 1024: 1632 fd->sc_type->rate = FDC_250KBPS; 1633 break; 1634 default: 1635 return (EINVAL); 1636 } 1637 1638 if (form_parms->nspt > FD_MAX_NSEC || 1639 form_parms->fillbyte > 0xff || 1640 form_parms->interleave > 0xff) 1641 return EINVAL; 1642 fd->sc_type->sectrac = form_parms->nspt; 1643 if (form_parms->ntrk != 2 && form_parms->ntrk != 1) 1644 return EINVAL; 1645 fd->sc_type->heads = form_parms->ntrk; 1646 fd->sc_type->seccyl = form_parms->nspt * form_parms->ntrk; 1647 fd->sc_type->secsize = ffs(i)-1; 1648 fd->sc_type->gap2 = form_parms->gaplen; 1649 fd->sc_type->tracks = form_parms->ncyl; 1650 fd->sc_type->size = fd->sc_type->seccyl * form_parms->ncyl * 1651 form_parms->nbps / DEV_BSIZE; 1652 fd->sc_type->step = form_parms->stepspercyl; 1653 fd->sc_type->fillbyte = form_parms->fillbyte; 1654 fd->sc_type->interleave = form_parms->interleave; 1655 return (0); 1656 1657 case FDIOCFORMAT_TRACK: 1658 if((flag & FWRITE) == 0) 1659 /* must be opened for writing */ 1660 return (EBADF); 1661 form_cmd = (struct fdformat_cmd *)addr; 1662 if (form_cmd->formatcmd_version != FDFORMAT_VERSION) 1663 /* wrong version of formatting prog */ 1664 return (EINVAL); 1665 1666 if (form_cmd->head >= fd->sc_type->heads || 1667 form_cmd->cylinder >= fd->sc_type->tracks) { 1668 return (EINVAL); 1669 } 1670 1671 fd_formb.head = form_cmd->head; 1672 fd_formb.cyl = form_cmd->cylinder; 1673 fd_formb.transfer_rate = fd->sc_type->rate; 1674 fd_formb.fd_formb_secshift = fd->sc_type->secsize; 1675 fd_formb.fd_formb_nsecs = fd->sc_type->sectrac; 1676 fd_formb.fd_formb_gaplen = fd->sc_type->gap2; 1677 fd_formb.fd_formb_fillbyte = fd->sc_type->fillbyte; 1678 1679 bzero(il, sizeof(il)); 1680 for (j = 0, i = 1; i <= fd_formb.fd_formb_nsecs; i++) { 1681 while (il[(j%fd_formb.fd_formb_nsecs) + 1]) 1682 j++; 1683 il[(j%fd_formb.fd_formb_nsecs) + 1] = i; 1684 j += fd->sc_type->interleave; 1685 } 1686 for (i = 0; i < fd_formb.fd_formb_nsecs; i++) { 1687 fd_formb.fd_formb_cylno(i) = form_cmd->cylinder; 1688 fd_formb.fd_formb_headno(i) = form_cmd->head; 1689 fd_formb.fd_formb_secno(i) = il[i+1]; 1690 fd_formb.fd_formb_secsize(i) = fd->sc_type->secsize; 1691 } 1692 1693 return fdformat(dev, &fd_formb, p); 1694 1695 case FDIOCGETOPTS: /* get drive options */ 1696 *(int *)addr = fd->sc_opts; 1697 return (0); 1698 1699 case FDIOCSETOPTS: /* set drive options */ 1700 fd->sc_opts = *(int *)addr; 1701 return (0); 1702 1703 #ifdef DEBUG 1704 case _IO('f', 100): 1705 { 1706 int i; 1707 struct fdc_softc *fdc = (struct fdc_softc *) 1708 fd->sc_dv.dv_parent; 1709 1710 out_fdc(fdc, NE7CMD_DUMPREG); 1711 fdcresult(fdc); 1712 printf("dumpreg(%d regs): <", fdc->sc_nstat); 1713 for (i = 0; i < fdc->sc_nstat; i++) 1714 printf(" %x", fdc->sc_status[i]); 1715 printf(">\n"); 1716 } 1717 1718 return (0); 1719 case _IOW('f', 101, int): 1720 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg &= 1721 ~CFG_THRHLD_MASK; 1722 ((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |= 1723 (*(int *)addr & CFG_THRHLD_MASK); 1724 fdconf((struct fdc_softc *) fd->sc_dv.dv_parent); 1725 return (0); 1726 case _IO('f', 102): 1727 { 1728 int i; 1729 struct fdc_softc *fdc = (struct fdc_softc *) 1730 fd->sc_dv.dv_parent; 1731 out_fdc(fdc, NE7CMD_SENSEI); 1732 fdcresult(fdc); 1733 printf("sensei(%d regs): <", fdc->sc_nstat); 1734 for (i=0; i< fdc->sc_nstat; i++) 1735 printf(" 0x%x", fdc->sc_status[i]); 1736 } 1737 printf(">\n"); 1738 return (0); 1739 #endif 1740 default: 1741 return (ENOTTY); 1742 } 1743 1744 #ifdef DIAGNOSTIC 1745 panic("fdioctl: impossible"); 1746 #endif 1747 } 1748 1749 int 1750 fdformat(dev, finfo, p) 1751 dev_t dev; 1752 struct ne7_fd_formb *finfo; 1753 struct proc *p; 1754 { 1755 int rv = 0, s; 1756 struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)]; 1757 struct fd_type *type = fd->sc_type; 1758 struct buf *bp; 1759 1760 /* set up a buffer header for fdstrategy() */ 1761 bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT); 1762 if (bp == 0) 1763 return (ENOBUFS); 1764 1765 PHOLD(p); 1766 bzero((void *)bp, sizeof(struct buf)); 1767 bp->b_flags = B_BUSY | B_PHYS | B_FORMAT; 1768 bp->b_proc = p; 1769 bp->b_dev = dev; 1770 1771 /* 1772 * Calculate a fake blkno, so fdstrategy() would initiate a 1773 * seek to the requested cylinder. 1774 */ 1775 bp->b_blkno = (finfo->cyl * (type->sectrac * type->heads) 1776 + finfo->head * type->sectrac) * FDC_BSIZE / DEV_BSIZE; 1777 1778 bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs; 1779 bp->b_data = (caddr_t)finfo; 1780 1781 #ifdef FD_DEBUG 1782 if (fdc_debug) 1783 printf("fdformat: blkno %x count %ld\n", 1784 bp->b_blkno, bp->b_bcount); 1785 #endif 1786 1787 /* now do the format */ 1788 fdstrategy(bp); 1789 1790 /* ...and wait for it to complete */ 1791 s = splbio(); 1792 while (!(bp->b_flags & B_DONE)) { 1793 rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz); 1794 if (rv == EWOULDBLOCK) 1795 break; 1796 } 1797 splx(s); 1798 1799 if (rv == EWOULDBLOCK) { 1800 /* timed out */ 1801 rv = EIO; 1802 biodone(bp); 1803 } 1804 if (bp->b_flags & B_ERROR) { 1805 rv = bp->b_error; 1806 } 1807 PRELE(p); 1808 free(bp, M_TEMP); 1809 return (rv); 1810 } 1811 1812 void 1813 fdgetdisklabel(dev) 1814 dev_t dev; 1815 { 1816 int unit = FDUNIT(dev), i; 1817 struct fd_softc *fd = fd_cd.cd_devs[unit]; 1818 struct disklabel *lp = fd->sc_dk.dk_label; 1819 struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel; 1820 1821 bzero(lp, sizeof(struct disklabel)); 1822 bzero(lp, sizeof(struct cpu_disklabel)); 1823 1824 lp->d_type = DTYPE_FLOPPY; 1825 lp->d_secsize = FDC_BSIZE; 1826 lp->d_secpercyl = fd->sc_type->seccyl; 1827 lp->d_nsectors = fd->sc_type->sectrac; 1828 lp->d_ncylinders = fd->sc_type->tracks; 1829 lp->d_ntracks = fd->sc_type->heads; /* Go figure... */ 1830 lp->d_rpm = 3600; /* XXX like it matters... */ 1831 1832 strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename)); 1833 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 1834 lp->d_interleave = 1; 1835 1836 lp->d_partitions[RAW_PART].p_offset = 0; 1837 lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders; 1838 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 1839 lp->d_npartitions = RAW_PART + 1; 1840 1841 lp->d_magic = DISKMAGIC; 1842 lp->d_magic2 = DISKMAGIC; 1843 lp->d_checksum = dkcksum(lp); 1844 1845 /* 1846 * Call the generic disklabel extraction routine. If there's 1847 * not a label there, fake it. 1848 */ 1849 if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) { 1850 strncpy(lp->d_packname, "default label", 1851 sizeof(lp->d_packname)); 1852 /* 1853 * Reset the partition info; it might have gotten 1854 * trashed in readdisklabel(). 1855 * 1856 * XXX Why do we have to do this? readdisklabel() 1857 * should be safe... 1858 */ 1859 for (i = 0; i < MAXPARTITIONS; ++i) { 1860 lp->d_partitions[i].p_offset = 0; 1861 if (i == RAW_PART) { 1862 lp->d_partitions[i].p_size = 1863 lp->d_secpercyl * lp->d_ncylinders; 1864 lp->d_partitions[i].p_fstype = FS_BSDFFS; 1865 } else { 1866 lp->d_partitions[i].p_size = 0; 1867 lp->d_partitions[i].p_fstype = FS_UNUSED; 1868 } 1869 } 1870 lp->d_npartitions = RAW_PART + 1; 1871 } 1872 } 1873 1874 void 1875 fd_do_eject(fdc, unit) 1876 struct fdc_softc *fdc; 1877 int unit; 1878 { 1879 fdc->sc_fcr |= FCR_DSEL(unit)|FCR_EJECT; 1880 FCR_REG_SYNC(); 1881 delay(10); 1882 fdc->sc_fcr &= ~(FCR_DSEL(unit)|FCR_EJECT); 1883 FCR_REG_SYNC(); 1884 } 1885 1886 #ifdef MEMORY_DISK_HOOKS_sun3x_not_yet 1887 int fd_read_md_image __P((size_t *, caddr_t *)); 1888 #endif 1889 1890 /* ARGSUSED */ 1891 void 1892 fd_mountroot_hook(dev) 1893 struct device *dev; 1894 { 1895 int c; 1896 1897 fd_do_eject(fdc_cd.cd_devs[0], 0); /* XXX - doesn't check ``dev'' */ 1898 printf("Insert filesystem floppy and press return."); 1899 for (;;) { 1900 c = cngetc(); 1901 if ((c == '\r') || (c == '\n')) { 1902 printf("\n"); 1903 break; 1904 } 1905 } 1906 #ifdef MEMORY_DISK_HOOKS_sun3x_not_yet 1907 { 1908 extern int (*md_read_image) __P((size_t *, caddr_t *)); 1909 md_read_image = fd_read_md_image; 1910 } 1911 #endif 1912 } 1913 1914 #ifdef MEMORY_DISK_HOOKS_sun3x_not_yet 1915 1916 #define FDMICROROOTSIZE ((2*18*80) << DEV_BSHIFT) 1917 1918 int 1919 fd_read_md_image(sizep, addrp) 1920 size_t *sizep; 1921 caddr_t *addrp; 1922 { 1923 struct buf buf, *bp = &buf; 1924 dev_t dev; 1925 off_t offset; 1926 caddr_t addr; 1927 1928 dev = makedev(54,0); /* XXX */ 1929 1930 MALLOC(addr, caddr_t, FDMICROROOTSIZE, M_DEVBUF, M_WAITOK); 1931 *addrp = addr; 1932 1933 if (fdopen(dev, 0, S_IFCHR, NULL)) 1934 panic("fd: mountroot: fdopen"); 1935 1936 offset = 0; 1937 1938 for (;;) { 1939 bp->b_dev = dev; 1940 bp->b_error = 0; 1941 bp->b_resid = 0; 1942 bp->b_proc = NULL; 1943 bp->b_flags = B_BUSY | B_PHYS | B_RAW | B_READ; 1944 bp->b_blkno = btodb(offset); 1945 bp->b_bcount = DEV_BSIZE; 1946 bp->b_data = addr; 1947 fdstrategy(bp); 1948 while ((bp->b_flags & B_DONE) == 0) { 1949 tsleep((caddr_t)bp, PRIBIO + 1, "physio", 0); 1950 } 1951 if (bp->b_error) 1952 panic("fd: mountroot: fdread error %d", bp->b_error); 1953 1954 if (bp->b_resid != 0) 1955 break; 1956 1957 addr += DEV_BSIZE; 1958 offset += DEV_BSIZE; 1959 if (offset + DEV_BSIZE > FDMICROROOTSIZE) 1960 break; 1961 } 1962 (void)fdclose(dev, 0, S_IFCHR, NULL); 1963 *sizep = offset; 1964 fd_do_eject(fdc_cd.cd_devs[0], FDUNIT(dev)); /* XXX */ 1965 return (0); 1966 } 1967 #endif 1968