Annotation of sys/dev/isa/fd.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: fd.c,v 1.67 2007/06/20 18:15:46 deraadt Exp $ */
! 2: /* $NetBSD: fd.c,v 1.90 1996/05/12 23:12:03 mycroft Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1993, 1994, 1995, 1996 Charles Hannum.
! 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: * Portions Copyright (c) 1993, 1994 by
! 13: * jc@irbs.UUCP (John Capo)
! 14: * vak@zebub.msk.su (Serge Vakulenko)
! 15: * ache@astral.msk.su (Andrew A. Chernov)
! 16: * joerg_wunsch@uriah.sax.de (Joerg Wunsch)
! 17: *
! 18: * Redistribution and use in source and binary forms, with or without
! 19: * modification, are permitted provided that the following conditions
! 20: * are met:
! 21: * 1. Redistributions of source code must retain the above copyright
! 22: * notice, this list of conditions and the following disclaimer.
! 23: * 2. Redistributions in binary form must reproduce the above copyright
! 24: * notice, this list of conditions and the following disclaimer in the
! 25: * documentation and/or other materials provided with the distribution.
! 26: * 3. Neither the name of the University nor the names of its contributors
! 27: * may be used to endorse or promote products derived from this software
! 28: * without specific prior written permission.
! 29: *
! 30: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 31: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 32: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 33: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 34: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 35: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 36: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 37: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 38: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 39: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 40: * SUCH DAMAGE.
! 41: *
! 42: * @(#)fd.c 7.4 (Berkeley) 5/25/91
! 43: */
! 44:
! 45: #include <sys/param.h>
! 46: #include <sys/systm.h>
! 47: #include <sys/kernel.h>
! 48: #include <sys/file.h>
! 49: #include <sys/ioctl.h>
! 50: #include <sys/device.h>
! 51: #include <sys/disklabel.h>
! 52: #include <sys/dkstat.h>
! 53: #include <sys/disk.h>
! 54: #include <sys/buf.h>
! 55: #include <sys/malloc.h>
! 56: #include <sys/uio.h>
! 57: #include <sys/mtio.h>
! 58: #include <sys/proc.h>
! 59: #include <sys/syslog.h>
! 60: #include <sys/queue.h>
! 61: #include <sys/timeout.h>
! 62:
! 63: #include <machine/cpu.h>
! 64: #include <machine/bus.h>
! 65: #include <machine/conf.h>
! 66: #include <machine/intr.h>
! 67: #include <machine/ioctl_fd.h>
! 68:
! 69: #include <dev/isa/isavar.h>
! 70: #include <dev/isa/isadmavar.h>
! 71: #include <dev/isa/fdreg.h>
! 72:
! 73: #if defined(__i386__) || defined(__amd64__) /* XXX */
! 74: #include <i386/isa/nvram.h>
! 75: #endif
! 76:
! 77: #include <dev/isa/fdlink.h>
! 78:
! 79: /* XXX misuse a flag to identify format operation */
! 80: #define B_FORMAT B_XXX
! 81:
! 82: /* fd_type struct now in ioctl_fd.h */
! 83:
! 84: /* The order of entries in the following table is important -- BEWARE! */
! 85: struct fd_type fd_types[] = {
! 86: { 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */
! 87: { 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS, "1.2MB" }, /* 1.2 MB AT-diskettes */
! 88: { 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS, "360KB/AT" }, /* 360kB in 1.2MB drive */
! 89: { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS, "360KB/PC" }, /* 360kB PC diskettes */
! 90: { 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS, "720KB" }, /* 3.5" 720kB diskette */
! 91: { 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS, "720KB/x" }, /* 720kB in 1.2MB drive */
! 92: { 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS, "360KB/x" }, /* 360kB in 720kB drive */
! 93: { 36,2,72,2,0xff,0xaf,0x1b,0x54,80,5760,1,FDC_500KBPS,"2.88MB" }, /* 2.88MB diskette */
! 94: { 8,2,16,3,0xff,0xdf,0x35,0x74,77,1232,1,FDC_500KBPS,"1.2MB/[1024bytes/sector]" } /* 1.2 MB japanese format */
! 95: };
! 96:
! 97: /* software state, per disk (with up to 4 disks per ctlr) */
! 98: struct fd_softc {
! 99: struct device sc_dev;
! 100: struct disk sc_dk;
! 101:
! 102: struct fd_type *sc_deftype; /* default type descriptor */
! 103: struct fd_type *sc_type; /* current type descriptor */
! 104:
! 105: daddr64_t sc_blkno; /* starting block number */
! 106: int sc_bcount; /* byte count left */
! 107: int sc_opts; /* user-set options */
! 108: int sc_skip; /* bytes already transferred */
! 109: int sc_nblks; /* number of blocks currently transferring */
! 110: int sc_nbytes; /* number of bytes currently transferring */
! 111:
! 112: int sc_drive; /* physical unit number */
! 113: int sc_flags;
! 114: #define FD_OPEN 0x01 /* it's open */
! 115: #define FD_MOTOR 0x02 /* motor should be on */
! 116: #define FD_MOTOR_WAIT 0x04 /* motor coming up */
! 117: int sc_cylin; /* where we think the head is */
! 118:
! 119: void *sc_sdhook; /* saved shutdown hook for drive. */
! 120:
! 121: TAILQ_ENTRY(fd_softc) sc_drivechain;
! 122: int sc_ops; /* I/O ops since last switch */
! 123: struct buf sc_q; /* head of buf chain */
! 124: struct timeout fd_motor_on_to;
! 125: struct timeout fd_motor_off_to;
! 126: struct timeout fdtimeout_to;
! 127: };
! 128:
! 129: /* floppy driver configuration */
! 130: int fdprobe(struct device *, void *, void *);
! 131: void fdattach(struct device *, struct device *, void *);
! 132:
! 133: struct cfattach fd_ca = {
! 134: sizeof(struct fd_softc), fdprobe, fdattach
! 135: };
! 136:
! 137: struct cfdriver fd_cd = {
! 138: NULL, "fd", DV_DISK
! 139: };
! 140:
! 141: void fdgetdisklabel(struct fd_softc *);
! 142: int fd_get_parms(struct fd_softc *);
! 143: void fdstrategy(struct buf *);
! 144: void fdstart(struct fd_softc *);
! 145: int fdintr(struct fdc_softc *);
! 146:
! 147: struct dkdriver fddkdriver = { fdstrategy };
! 148:
! 149: void fd_set_motor(struct fdc_softc *fdc, int reset);
! 150: void fd_motor_off(void *arg);
! 151: void fd_motor_on(void *arg);
! 152: void fdfinish(struct fd_softc *fd, struct buf *bp);
! 153: int fdformat(dev_t, struct fd_formb *, struct proc *);
! 154: static __inline struct fd_type *fd_dev_to_type(struct fd_softc *, dev_t);
! 155: void fdretry(struct fd_softc *);
! 156: void fdtimeout(void *);
! 157:
! 158: int
! 159: fdprobe(parent, match, aux)
! 160: struct device *parent;
! 161: void *match, *aux;
! 162: {
! 163: struct fdc_softc *fdc = (void *)parent;
! 164: struct cfdata *cf = match;
! 165: struct fdc_attach_args *fa = aux;
! 166: int drive = fa->fa_drive;
! 167: bus_space_tag_t iot = fdc->sc_iot;
! 168: bus_space_handle_t ioh = fdc->sc_ioh;
! 169: int n;
! 170:
! 171: if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != drive)
! 172: return 0;
! 173: /*
! 174: * XXX
! 175: * This is to work around some odd interactions between this driver
! 176: * and SMC Ethernet cards.
! 177: */
! 178: if (cf->cf_loc[0] == -1 && drive >= 2)
! 179: return 0;
! 180:
! 181: /*
! 182: * We want to keep the flags config gave us.
! 183: */
! 184: fa->fa_flags = cf->cf_flags;
! 185:
! 186: /* select drive and turn on motor */
! 187: bus_space_write_1(iot, ioh, fdout, drive | FDO_FRST | FDO_MOEN(drive));
! 188: /* wait for motor to spin up */
! 189: delay(250000);
! 190: out_fdc(iot, ioh, NE7CMD_RECAL);
! 191: out_fdc(iot, ioh, drive);
! 192: /* wait for recalibrate */
! 193: delay(2000000);
! 194: out_fdc(iot, ioh, NE7CMD_SENSEI);
! 195: n = fdcresult(fdc);
! 196: #ifdef FD_DEBUG
! 197: {
! 198: int i;
! 199: printf("fdprobe: status");
! 200: for (i = 0; i < n; i++)
! 201: printf(" %x", fdc->sc_status[i]);
! 202: printf("\n");
! 203: }
! 204: #endif
! 205:
! 206: /* turn off motor */
! 207: delay(250000);
! 208: bus_space_write_1(iot, ioh, fdout, FDO_FRST);
! 209:
! 210: /* flags & 0x20 forces the drive to be found even if it won't probe */
! 211: if (!(fa->fa_flags & 0x20) && (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20))
! 212: return 0;
! 213:
! 214: return 1;
! 215: }
! 216:
! 217: /*
! 218: * Controller is working, and drive responded. Attach it.
! 219: */
! 220: void
! 221: fdattach(parent, self, aux)
! 222: struct device *parent, *self;
! 223: void *aux;
! 224: {
! 225: struct fdc_softc *fdc = (void *)parent;
! 226: struct fd_softc *fd = (void *)self;
! 227: struct fdc_attach_args *fa = aux;
! 228: struct fd_type *type = fa->fa_deftype;
! 229: int drive = fa->fa_drive;
! 230:
! 231: if (!type || (fa->fa_flags & 0x10)) {
! 232: /* The config has overridden this. */
! 233: switch (fa->fa_flags & 0x07) {
! 234: case 1: /* 2.88MB */
! 235: type = &fd_types[7];
! 236: break;
! 237: case 2: /* 1.44MB */
! 238: type = &fd_types[0];
! 239: break;
! 240: case 3: /* 1.2MB */
! 241: type = &fd_types[1];
! 242: break;
! 243: case 4: /* 720K */
! 244: type = &fd_types[4];
! 245: break;
! 246: case 5: /* 360K */
! 247: type = &fd_types[3];
! 248: break;
! 249: case 6: /* 1.2 MB japanese format */
! 250: type = &fd_types[8];
! 251: break;
! 252: #ifdef __alpha__
! 253: default:
! 254: /* 1.44MB, how to detect others?
! 255: * idea from NetBSD -- jay@rootaction.net
! 256: */
! 257: type = &fd_types[0];
! 258: #endif
! 259: }
! 260: }
! 261:
! 262: if (type)
! 263: printf(": %s %d cyl, %d head, %d sec\n", type->name,
! 264: type->tracks, type->heads, type->sectrac);
! 265: else
! 266: printf(": density unknown\n");
! 267:
! 268: fd->sc_cylin = -1;
! 269: fd->sc_drive = drive;
! 270: fd->sc_deftype = type;
! 271: fdc->sc_type[drive] = FDC_TYPE_DISK;
! 272: fdc->sc_link.fdlink.sc_fd[drive] = fd;
! 273:
! 274: /*
! 275: * Initialize and attach the disk structure.
! 276: */
! 277: fd->sc_dk.dk_name = fd->sc_dev.dv_xname;
! 278: fd->sc_dk.dk_driver = &fddkdriver;
! 279: disk_attach(&fd->sc_dk);
! 280:
! 281: /* Needed to power off if the motor is on when we halt. */
! 282: fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd);
! 283:
! 284: /* Setup timeout structures */
! 285: timeout_set(&fd->fd_motor_on_to, fd_motor_on, fd);
! 286: timeout_set(&fd->fd_motor_off_to, fd_motor_off, fd);
! 287: timeout_set(&fd->fdtimeout_to, fdtimeout, fd);
! 288: }
! 289:
! 290: /*
! 291: * Translate nvram type into internal data structure. Return NULL for
! 292: * none/unknown/unusable.
! 293: */
! 294: struct fd_type *
! 295: fd_nvtotype(fdc, nvraminfo, drive)
! 296: char *fdc;
! 297: int nvraminfo, drive;
! 298: {
! 299: #ifdef __alpha__
! 300: /* Alpha: assume 1.44MB, idea from NetBSD sys/dev/isa/fd.c
! 301: * -- jay@rootaction.net
! 302: */
! 303: return &fd_types[0]; /* 1.44MB */
! 304: #else
! 305: int type;
! 306:
! 307: type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0;
! 308: switch (type) {
! 309: case NVRAM_DISKETTE_NONE:
! 310: return NULL;
! 311: case NVRAM_DISKETTE_12M:
! 312: return &fd_types[1];
! 313: case NVRAM_DISKETTE_TYPE5:
! 314: case NVRAM_DISKETTE_TYPE6:
! 315: return &fd_types[7];
! 316: case NVRAM_DISKETTE_144M:
! 317: return &fd_types[0];
! 318: case NVRAM_DISKETTE_360K:
! 319: return &fd_types[3];
! 320: case NVRAM_DISKETTE_720K:
! 321: return &fd_types[4];
! 322: default:
! 323: printf("%s: drive %d: unknown device type 0x%x\n",
! 324: fdc, drive, type);
! 325: return NULL;
! 326: }
! 327: #endif
! 328: }
! 329:
! 330: static __inline struct fd_type *
! 331: fd_dev_to_type(fd, dev)
! 332: struct fd_softc *fd;
! 333: dev_t dev;
! 334: {
! 335: int type = FDTYPE(dev);
! 336:
! 337: if (type > (sizeof(fd_types) / sizeof(fd_types[0])))
! 338: return NULL;
! 339: return type ? &fd_types[type - 1] : fd->sc_deftype;
! 340: }
! 341:
! 342: void
! 343: fdstrategy(bp)
! 344: register struct buf *bp; /* IO operation to perform */
! 345: {
! 346: struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(bp->b_dev)];
! 347: int sz;
! 348: int s;
! 349: int fd_bsize = FD_BSIZE(fd);
! 350: int bf = fd_bsize / DEV_BSIZE;
! 351:
! 352: /* Valid unit, controller, and request? */
! 353: if (bp->b_blkno < 0 ||
! 354: (((bp->b_blkno % bf) != 0 ||
! 355: (bp->b_bcount % fd_bsize) != 0) &&
! 356: (bp->b_flags & B_FORMAT) == 0)) {
! 357: bp->b_error = EINVAL;
! 358: goto bad;
! 359: }
! 360:
! 361: /* If it's a null transfer, return immediately. */
! 362: if (bp->b_bcount == 0)
! 363: goto done;
! 364:
! 365: sz = howmany(bp->b_bcount, DEV_BSIZE);
! 366:
! 367: if (bp->b_blkno + sz > fd->sc_type->size * bf) {
! 368: sz = fd->sc_type->size * bf - bp->b_blkno;
! 369: if (sz == 0)
! 370: /* If exactly at end of disk, return EOF. */
! 371: goto done;
! 372: if (sz < 0) {
! 373: /* If past end of disk, return EINVAL. */
! 374: bp->b_error = EINVAL;
! 375: goto bad;
! 376: }
! 377: /* Otherwise, truncate request. */
! 378: bp->b_bcount = sz << DEV_BSHIFT;
! 379: }
! 380:
! 381: bp->b_cylinder = bp->b_blkno / (fd_bsize / DEV_BSIZE) / fd->sc_type->seccyl;
! 382:
! 383: #ifdef FD_DEBUG
! 384: printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d sz %d\n",
! 385: bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylinder, sz);
! 386: #endif
! 387:
! 388: /* Queue transfer on drive, activate drive and controller if idle. */
! 389: s = splbio();
! 390: disksort(&fd->sc_q, bp);
! 391: timeout_del(&fd->fd_motor_off_to); /* a good idea */
! 392: if (!fd->sc_q.b_active)
! 393: fdstart(fd);
! 394: #ifdef DIAGNOSTIC
! 395: else {
! 396: struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
! 397: if (fdc->sc_state == DEVIDLE) {
! 398: printf("fdstrategy: controller inactive\n");
! 399: fdcstart(fdc);
! 400: }
! 401: }
! 402: #endif
! 403: splx(s);
! 404: return;
! 405:
! 406: bad:
! 407: bp->b_flags |= B_ERROR;
! 408: done:
! 409: /* Toss transfer; we're done early. */
! 410: bp->b_resid = bp->b_bcount;
! 411: s = splbio();
! 412: biodone(bp);
! 413: splx(s);
! 414: }
! 415:
! 416: void
! 417: fdstart(fd)
! 418: struct fd_softc *fd;
! 419: {
! 420: struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
! 421: int active = !TAILQ_EMPTY(&fdc->sc_link.fdlink.sc_drives);
! 422:
! 423: /* Link into controller queue. */
! 424: fd->sc_q.b_active = 1;
! 425: TAILQ_INSERT_TAIL(&fdc->sc_link.fdlink.sc_drives, fd, sc_drivechain);
! 426:
! 427: /* If controller not already active, start it. */
! 428: if (!active)
! 429: fdcstart(fdc);
! 430: }
! 431:
! 432: void
! 433: fdfinish(fd, bp)
! 434: struct fd_softc *fd;
! 435: struct buf *bp;
! 436: {
! 437: struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
! 438:
! 439: splassert(IPL_BIO);
! 440:
! 441: /*
! 442: * Move this drive to the end of the queue to give others a `fair'
! 443: * chance. We only force a switch if N operations are completed while
! 444: * another drive is waiting to be serviced, since there is a long motor
! 445: * startup delay whenever we switch.
! 446: */
! 447: if (TAILQ_NEXT(fd, sc_drivechain) != NULL && ++fd->sc_ops >= 8) {
! 448: fd->sc_ops = 0;
! 449: TAILQ_REMOVE(&fdc->sc_link.fdlink.sc_drives, fd, sc_drivechain);
! 450: if (bp->b_actf) {
! 451: TAILQ_INSERT_TAIL(&fdc->sc_link.fdlink.sc_drives, fd,
! 452: sc_drivechain);
! 453: } else
! 454: fd->sc_q.b_active = 0;
! 455: }
! 456: bp->b_resid = fd->sc_bcount;
! 457: fd->sc_skip = 0;
! 458: fd->sc_q.b_actf = bp->b_actf;
! 459:
! 460: biodone(bp);
! 461: /* turn off motor 5s from now */
! 462: timeout_add(&fd->fd_motor_off_to, 5 * hz);
! 463: fdc->sc_state = DEVIDLE;
! 464: }
! 465:
! 466: int
! 467: fdread(dev, uio, flags)
! 468: dev_t dev;
! 469: struct uio *uio;
! 470: int flags;
! 471: {
! 472:
! 473: return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio));
! 474: }
! 475:
! 476: int
! 477: fdwrite(dev, uio, flags)
! 478: dev_t dev;
! 479: struct uio *uio;
! 480: int flags;
! 481: {
! 482:
! 483: return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio));
! 484: }
! 485:
! 486: void
! 487: fd_set_motor(fdc, reset)
! 488: struct fdc_softc *fdc;
! 489: int reset;
! 490: {
! 491: struct fd_softc *fd;
! 492: u_char status;
! 493: int n;
! 494:
! 495: if ((fd = TAILQ_FIRST(&fdc->sc_link.fdlink.sc_drives)) != NULL)
! 496: status = fd->sc_drive;
! 497: else
! 498: status = 0;
! 499: if (!reset)
! 500: status |= FDO_FRST | FDO_FDMAEN;
! 501: for (n = 0; n < 4; n++)
! 502: if ((fd = fdc->sc_link.fdlink.sc_fd[n])
! 503: && (fd->sc_flags & FD_MOTOR))
! 504: status |= FDO_MOEN(n);
! 505: bus_space_write_1(fdc->sc_iot, fdc->sc_ioh, fdout, status);
! 506: }
! 507:
! 508: void
! 509: fd_motor_off(arg)
! 510: void *arg;
! 511: {
! 512: struct fd_softc *fd = arg;
! 513: int s;
! 514:
! 515: s = splbio();
! 516: fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
! 517: fd_set_motor((struct fdc_softc *)fd->sc_dev.dv_parent, 0);
! 518: splx(s);
! 519: }
! 520:
! 521: void
! 522: fd_motor_on(arg)
! 523: void *arg;
! 524: {
! 525: struct fd_softc *fd = arg;
! 526: struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
! 527: int s;
! 528:
! 529: s = splbio();
! 530: fd->sc_flags &= ~FD_MOTOR_WAIT;
! 531: if ((TAILQ_FIRST(&fdc->sc_link.fdlink.sc_drives) == fd)
! 532: && (fdc->sc_state == MOTORWAIT))
! 533: (void) fdintr(fdc);
! 534: splx(s);
! 535: }
! 536:
! 537: int
! 538: fdopen(dev, flags, mode, p)
! 539: dev_t dev;
! 540: int flags;
! 541: int mode;
! 542: struct proc *p;
! 543: {
! 544: int unit;
! 545: struct fd_softc *fd;
! 546: struct fd_type *type;
! 547:
! 548: unit = FDUNIT(dev);
! 549: if (unit >= fd_cd.cd_ndevs)
! 550: return ENXIO;
! 551: fd = fd_cd.cd_devs[unit];
! 552: if (fd == 0)
! 553: return ENXIO;
! 554: type = fd_dev_to_type(fd, dev);
! 555: if (type == NULL)
! 556: return ENXIO;
! 557:
! 558: if ((fd->sc_flags & FD_OPEN) != 0 &&
! 559: fd->sc_type != type)
! 560: return EBUSY;
! 561:
! 562: fd->sc_type = type;
! 563: fd->sc_cylin = -1;
! 564: fd->sc_flags |= FD_OPEN;
! 565:
! 566: return 0;
! 567: }
! 568:
! 569: int
! 570: fdclose(dev, flags, mode, p)
! 571: dev_t dev;
! 572: int flags;
! 573: int mode;
! 574: struct proc *p;
! 575: {
! 576: struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)];
! 577:
! 578: fd->sc_flags &= ~FD_OPEN;
! 579: fd->sc_opts &= ~FDOPT_NORETRY;
! 580: return 0;
! 581: }
! 582:
! 583: daddr64_t
! 584: fdsize(dev)
! 585: dev_t dev;
! 586: {
! 587:
! 588: /* Swapping to floppies would not make sense. */
! 589: return -1;
! 590: }
! 591:
! 592: int
! 593: fddump(dev, blkno, va, size)
! 594: dev_t dev;
! 595: daddr64_t blkno;
! 596: caddr_t va;
! 597: size_t size;
! 598: {
! 599:
! 600: /* Not implemented. */
! 601: return ENXIO;
! 602: }
! 603:
! 604: /*
! 605: * Called from the controller.
! 606: */
! 607: int
! 608: fdintr(fdc)
! 609: struct fdc_softc *fdc;
! 610: {
! 611: #define st0 fdc->sc_status[0]
! 612: #define cyl fdc->sc_status[1]
! 613: struct fd_softc *fd;
! 614: struct buf *bp;
! 615: bus_space_tag_t iot = fdc->sc_iot;
! 616: bus_space_handle_t ioh = fdc->sc_ioh;
! 617: bus_space_handle_t ioh_ctl = fdc->sc_ioh_ctl;
! 618: int read, head, sec, i, nblks;
! 619: struct fd_type *type;
! 620: struct fd_formb *finfo = NULL;
! 621: int fd_bsize;
! 622:
! 623: loop:
! 624: /* Is there a transfer to this drive? If not, deactivate drive. */
! 625: fd = TAILQ_FIRST(&fdc->sc_link.fdlink.sc_drives);
! 626: if (fd == NULL) {
! 627: fdc->sc_state = DEVIDLE;
! 628: return 1;
! 629: }
! 630: fd_bsize = FD_BSIZE(fd);
! 631:
! 632: bp = fd->sc_q.b_actf;
! 633: if (bp == NULL) {
! 634: fd->sc_ops = 0;
! 635: TAILQ_REMOVE(&fdc->sc_link.fdlink.sc_drives, fd, sc_drivechain);
! 636: fd->sc_q.b_active = 0;
! 637: goto loop;
! 638: }
! 639:
! 640: if (bp->b_flags & B_FORMAT)
! 641: finfo = (struct fd_formb *)bp->b_data;
! 642:
! 643: switch (fdc->sc_state) {
! 644: case DEVIDLE:
! 645: fdc->sc_errors = 0;
! 646: fd->sc_skip = 0;
! 647: fd->sc_bcount = bp->b_bcount;
! 648: fd->sc_blkno = bp->b_blkno / (fd_bsize / DEV_BSIZE);
! 649: timeout_del(&fd->fd_motor_off_to);
! 650: if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) {
! 651: fdc->sc_state = MOTORWAIT;
! 652: return 1;
! 653: }
! 654: if ((fd->sc_flags & FD_MOTOR) == 0) {
! 655: /* Turn on the motor, being careful about pairing. */
! 656: struct fd_softc *ofd =
! 657: fdc->sc_link.fdlink.sc_fd[fd->sc_drive ^ 1];
! 658: if (ofd && ofd->sc_flags & FD_MOTOR) {
! 659: timeout_del(&ofd->fd_motor_off_to);
! 660: ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
! 661: }
! 662: fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT;
! 663: fd_set_motor(fdc, 0);
! 664: fdc->sc_state = MOTORWAIT;
! 665: /* Allow .25s for motor to stabilize. */
! 666: timeout_add(&fd->fd_motor_on_to, hz / 4);
! 667: return 1;
! 668: }
! 669: /* Make sure the right drive is selected. */
! 670: fd_set_motor(fdc, 0);
! 671:
! 672: /* FALLTHROUGH */
! 673: case DOSEEK:
! 674: doseek:
! 675: if (fd->sc_cylin == bp->b_cylinder)
! 676: goto doio;
! 677:
! 678: out_fdc(iot, ioh, NE7CMD_SPECIFY);/* specify command */
! 679: out_fdc(iot, ioh, fd->sc_type->steprate);
! 680: out_fdc(iot, ioh, 6); /* XXX head load time == 6ms */
! 681:
! 682: out_fdc(iot, ioh, NE7CMD_SEEK); /* seek function */
! 683: out_fdc(iot, ioh, fd->sc_drive); /* drive number */
! 684: out_fdc(iot, ioh, bp->b_cylinder * fd->sc_type->step);
! 685:
! 686: fd->sc_cylin = -1;
! 687: fdc->sc_state = SEEKWAIT;
! 688:
! 689: fd->sc_dk.dk_seek++;
! 690: disk_busy(&fd->sc_dk);
! 691:
! 692: timeout_add(&fd->fdtimeout_to, 4 * hz);
! 693: return 1;
! 694:
! 695: case DOIO:
! 696: doio:
! 697: type = fd->sc_type;
! 698: if (finfo)
! 699: fd->sc_skip = (char *)&(finfo->fd_formb_cylno(0)) -
! 700: (char *)finfo;
! 701: sec = fd->sc_blkno % type->seccyl;
! 702: nblks = type->seccyl - sec;
! 703: nblks = min(nblks, fd->sc_bcount / fd_bsize);
! 704: nblks = min(nblks, FDC_MAXIOSIZE / fd_bsize);
! 705: fd->sc_nblks = nblks;
! 706: fd->sc_nbytes = finfo ? bp->b_bcount : nblks * fd_bsize;
! 707: head = sec / type->sectrac;
! 708: sec -= head * type->sectrac;
! 709: #ifdef DIAGNOSTIC
! 710: {int block;
! 711: block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec;
! 712: if (block != fd->sc_blkno) {
! 713: printf("fdintr: block %d != blkno %d\n", block, fd->sc_blkno);
! 714: #ifdef DDB
! 715: Debugger();
! 716: #endif
! 717: }}
! 718: #endif
! 719: read = bp->b_flags & B_READ ? DMAMODE_READ : DMAMODE_WRITE;
! 720: isadma_start(bp->b_data + fd->sc_skip, fd->sc_nbytes,
! 721: fdc->sc_drq, read);
! 722: bus_space_write_1(iot, ioh_ctl, fdctl, type->rate);
! 723: #ifdef FD_DEBUG
! 724: printf("fdintr: %s drive %d track %d head %d sec %d nblks %d\n",
! 725: read ? "read" : "write", fd->sc_drive, fd->sc_cylin, head,
! 726: sec, nblks);
! 727: #endif
! 728: if (finfo) {
! 729: /* formatting */
! 730: if (out_fdc(iot, ioh, NE7CMD_FORMAT) < 0) {
! 731: fdc->sc_errors = 4;
! 732: fdretry(fd);
! 733: goto loop;
! 734: }
! 735: out_fdc(iot, ioh, (head << 2) | fd->sc_drive);
! 736: out_fdc(iot, ioh, finfo->fd_formb_secshift);
! 737: out_fdc(iot, ioh, finfo->fd_formb_nsecs);
! 738: out_fdc(iot, ioh, finfo->fd_formb_gaplen);
! 739: out_fdc(iot, ioh, finfo->fd_formb_fillbyte);
! 740: } else {
! 741: if (read)
! 742: out_fdc(iot, ioh, NE7CMD_READ); /* READ */
! 743: else
! 744: out_fdc(iot, ioh, NE7CMD_WRITE);/* WRITE */
! 745: out_fdc(iot, ioh, (head << 2) | fd->sc_drive);
! 746: out_fdc(iot, ioh, fd->sc_cylin); /* track */
! 747: out_fdc(iot, ioh, head);
! 748: out_fdc(iot, ioh, sec + 1); /* sec +1 */
! 749: out_fdc(iot, ioh, type->secsize); /* sec size */
! 750: out_fdc(iot, ioh, type->sectrac); /* secs/track */
! 751: out_fdc(iot, ioh, type->gap1); /* gap1 size */
! 752: out_fdc(iot, ioh, type->datalen); /* data len */
! 753: }
! 754: fdc->sc_state = IOCOMPLETE;
! 755:
! 756: disk_busy(&fd->sc_dk);
! 757:
! 758: /* allow 2 seconds for operation */
! 759: timeout_add(&fd->fdtimeout_to, 2 * hz);
! 760: return 1; /* will return later */
! 761:
! 762: case SEEKWAIT:
! 763: timeout_del(&fd->fdtimeout_to);
! 764: fdc->sc_state = SEEKCOMPLETE;
! 765: /* allow 1/50 second for heads to settle */
! 766: timeout_add(&fdc->fdcpseudointr_to, hz / 50);
! 767: return 1;
! 768:
! 769: case SEEKCOMPLETE:
! 770: disk_unbusy(&fd->sc_dk, 0, 0); /* no data on seek */
! 771:
! 772: /* Make sure seek really happened. */
! 773: out_fdc(iot, ioh, NE7CMD_SENSEI);
! 774: if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 ||
! 775: cyl != bp->b_cylinder * fd->sc_type->step) {
! 776: #ifdef FD_DEBUG
! 777: fdcstatus(&fd->sc_dev, 2, "seek failed");
! 778: #endif
! 779: fdretry(fd);
! 780: goto loop;
! 781: }
! 782: fd->sc_cylin = bp->b_cylinder;
! 783: goto doio;
! 784:
! 785: case IOTIMEDOUT:
! 786: isadma_abort(fdc->sc_drq);
! 787: case SEEKTIMEDOUT:
! 788: case RECALTIMEDOUT:
! 789: case RESETTIMEDOUT:
! 790: fdretry(fd);
! 791: goto loop;
! 792:
! 793: case IOCOMPLETE: /* IO DONE, post-analyze */
! 794: timeout_del(&fd->fdtimeout_to);
! 795:
! 796: disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid),
! 797: (bp->b_flags & B_READ));
! 798:
! 799: if (fdcresult(fdc) != 7 || (st0 & 0xf8) != 0) {
! 800: isadma_abort(fdc->sc_drq);
! 801: #ifdef FD_DEBUG
! 802: fdcstatus(&fd->sc_dev, 7, bp->b_flags & B_READ ?
! 803: "read failed" : "write failed");
! 804: printf("blkno %d nblks %d\n",
! 805: fd->sc_blkno, fd->sc_nblks);
! 806: #endif
! 807: fdretry(fd);
! 808: goto loop;
! 809: }
! 810: read = bp->b_flags & B_READ ? DMAMODE_READ : DMAMODE_WRITE;
! 811: isadma_done(fdc->sc_drq);
! 812: if (fdc->sc_errors) {
! 813: diskerr(bp, "fd", "soft error", LOG_PRINTF,
! 814: fd->sc_skip / fd_bsize, (struct disklabel *)NULL);
! 815: printf("\n");
! 816: fdc->sc_errors = 0;
! 817: }
! 818: fd->sc_blkno += fd->sc_nblks;
! 819: fd->sc_skip += fd->sc_nbytes;
! 820: fd->sc_bcount -= fd->sc_nbytes;
! 821: if (!finfo && fd->sc_bcount > 0) {
! 822: bp->b_cylinder = fd->sc_blkno / fd->sc_type->seccyl;
! 823: goto doseek;
! 824: }
! 825: fdfinish(fd, bp);
! 826: goto loop;
! 827:
! 828: case DORESET:
! 829: /* try a reset, keep motor on */
! 830: fd_set_motor(fdc, 1);
! 831: delay(100);
! 832: fd_set_motor(fdc, 0);
! 833: fdc->sc_state = RESETCOMPLETE;
! 834: timeout_add(&fd->fdtimeout_to, hz / 2);
! 835: return 1; /* will return later */
! 836:
! 837: case RESETCOMPLETE:
! 838: timeout_del(&fd->fdtimeout_to);
! 839: /* clear the controller output buffer */
! 840: for (i = 0; i < 4; i++) {
! 841: out_fdc(iot, ioh, NE7CMD_SENSEI);
! 842: (void) fdcresult(fdc);
! 843: }
! 844:
! 845: /* FALLTHROUGH */
! 846: case DORECAL:
! 847: out_fdc(iot, ioh, NE7CMD_RECAL); /* recal function */
! 848: out_fdc(iot, ioh, fd->sc_drive);
! 849: fdc->sc_state = RECALWAIT;
! 850: timeout_add(&fd->fdtimeout_to, 5 * hz);
! 851: return 1; /* will return later */
! 852:
! 853: case RECALWAIT:
! 854: timeout_del(&fd->fdtimeout_to);
! 855: fdc->sc_state = RECALCOMPLETE;
! 856: /* allow 1/30 second for heads to settle */
! 857: timeout_add(&fdc->fdcpseudointr_to, hz / 30);
! 858: return 1; /* will return later */
! 859:
! 860: case RECALCOMPLETE:
! 861: out_fdc(iot, ioh, NE7CMD_SENSEI);
! 862: if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) {
! 863: #ifdef FD_DEBUG
! 864: fdcstatus(&fd->sc_dev, 2, "recalibrate failed");
! 865: #endif
! 866: fdretry(fd);
! 867: goto loop;
! 868: }
! 869: fd->sc_cylin = 0;
! 870: goto doseek;
! 871:
! 872: case MOTORWAIT:
! 873: if (fd->sc_flags & FD_MOTOR_WAIT)
! 874: return 1; /* time's not up yet */
! 875: goto doseek;
! 876:
! 877: default:
! 878: fdcstatus(&fd->sc_dev, 0, "stray interrupt");
! 879: return 1;
! 880: }
! 881: #ifdef DIAGNOSTIC
! 882: panic("fdintr: impossible");
! 883: #endif
! 884: #undef st0
! 885: #undef cyl
! 886: }
! 887:
! 888: void
! 889: fdtimeout(arg)
! 890: void *arg;
! 891: {
! 892: struct fd_softc *fd = arg;
! 893: struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
! 894: int s;
! 895:
! 896: s = splbio();
! 897: #ifdef DEBUG
! 898: log(LOG_ERR,"fdtimeout: state %d\n", fdc->sc_state);
! 899: #endif
! 900: fdcstatus(&fd->sc_dev, 0, "timeout");
! 901:
! 902: if (fd->sc_q.b_actf)
! 903: fdc->sc_state++;
! 904: else
! 905: fdc->sc_state = DEVIDLE;
! 906:
! 907: (void) fdintr(fdc);
! 908: splx(s);
! 909: }
! 910:
! 911: void
! 912: fdretry(fd)
! 913: struct fd_softc *fd;
! 914: {
! 915: struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
! 916: struct buf *bp = fd->sc_q.b_actf;
! 917:
! 918: if (fd->sc_opts & FDOPT_NORETRY)
! 919: goto fail;
! 920: switch (fdc->sc_errors) {
! 921: case 0:
! 922: /* try again */
! 923: fdc->sc_state = DOSEEK;
! 924: break;
! 925:
! 926: case 1: case 2: case 3:
! 927: /* didn't work; try recalibrating */
! 928: fdc->sc_state = DORECAL;
! 929: break;
! 930:
! 931: case 4:
! 932: /* still no go; reset the bastard */
! 933: fdc->sc_state = DORESET;
! 934: break;
! 935:
! 936: default:
! 937: fail:
! 938: diskerr(bp, "fd", "hard error", LOG_PRINTF,
! 939: fd->sc_skip / FD_BSIZE(fd), (struct disklabel *)NULL);
! 940: printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n",
! 941: fdc->sc_status[0], NE7_ST0BITS,
! 942: fdc->sc_status[1], NE7_ST1BITS,
! 943: fdc->sc_status[2], NE7_ST2BITS,
! 944: fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]);
! 945:
! 946: bp->b_flags |= B_ERROR;
! 947: bp->b_error = EIO;
! 948: fdfinish(fd, bp);
! 949: }
! 950: fdc->sc_errors++;
! 951: }
! 952:
! 953: int
! 954: fdioctl(dev, cmd, addr, flag, p)
! 955: dev_t dev;
! 956: u_long cmd;
! 957: caddr_t addr;
! 958: int flag;
! 959: struct proc *p;
! 960: {
! 961: struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)];
! 962: struct disklabel dl, *lp = &dl;
! 963: char *errstring;
! 964: int error;
! 965:
! 966: switch (cmd) {
! 967: case MTIOCTOP:
! 968: if (((struct mtop *)addr)->mt_op != MTOFFL)
! 969: return EIO;
! 970: return (0);
! 971: case DIOCGDINFO:
! 972: bzero(lp, sizeof(*lp));
! 973:
! 974: lp->d_secsize = FD_BSIZE(fd);
! 975: lp->d_secpercyl = fd->sc_type->seccyl;
! 976: lp->d_ntracks = fd->sc_type->heads;
! 977: lp->d_nsectors = fd->sc_type->sectrac;
! 978: lp->d_ncylinders = fd->sc_type->tracks;
! 979:
! 980: strncpy(lp->d_typename, "floppy disk", sizeof lp->d_typename);
! 981: lp->d_type = DTYPE_FLOPPY;
! 982: strncpy(lp->d_packname, "fictitious", sizeof lp->d_packname);
! 983: DL_SETDSIZE(lp, fd->sc_type->size);
! 984: lp->d_rpm = 300;
! 985: lp->d_interleave = 1;
! 986: lp->d_version = 1;
! 987:
! 988: lp->d_magic = DISKMAGIC;
! 989: lp->d_magic2 = DISKMAGIC;
! 990: lp->d_checksum = dkcksum(lp);
! 991:
! 992: errstring = readdisklabel(DISKLABELDEV(dev), fdstrategy, lp, 0);
! 993: if (errstring) {
! 994: /*printf("%s: %s\n", fd->sc_dev.dv_xname, errstring);*/
! 995: }
! 996:
! 997: *(struct disklabel *)addr = *lp;
! 998: return 0;
! 999:
! 1000: case DIOCWLABEL:
! 1001: if ((flag & FWRITE) == 0)
! 1002: return EBADF;
! 1003: /* XXX do something */
! 1004: return 0;
! 1005:
! 1006: case DIOCWDINFO:
! 1007: if ((flag & FWRITE) == 0)
! 1008: return EBADF;
! 1009:
! 1010: error = setdisklabel(lp, (struct disklabel *)addr, 0);
! 1011: if (error)
! 1012: return error;
! 1013:
! 1014: error = writedisklabel(DISKLABELDEV(dev), fdstrategy, lp);
! 1015: return error;
! 1016:
! 1017: case FD_FORM:
! 1018: if((flag & FWRITE) == 0)
! 1019: return EBADF; /* must be opened for writing */
! 1020: else if(((struct fd_formb *)addr)->format_version !=
! 1021: FD_FORMAT_VERSION)
! 1022: return EINVAL; /* wrong version of formatting prog */
! 1023: else
! 1024: return fdformat(dev, (struct fd_formb *)addr, p);
! 1025: break;
! 1026:
! 1027: case FD_GTYPE: /* get drive type */
! 1028: *(struct fd_type *)addr = *fd->sc_type;
! 1029: return 0;
! 1030:
! 1031: case FD_GOPTS: /* get drive options */
! 1032: *(int *)addr = fd->sc_opts;
! 1033: return 0;
! 1034:
! 1035: case FD_SOPTS: /* set drive options */
! 1036: fd->sc_opts = *(int *)addr;
! 1037: return 0;
! 1038:
! 1039: default:
! 1040: return ENOTTY;
! 1041: }
! 1042:
! 1043: #ifdef DIAGNOSTIC
! 1044: panic("fdioctl: impossible");
! 1045: #endif
! 1046: }
! 1047:
! 1048: int
! 1049: fdformat(dev, finfo, p)
! 1050: dev_t dev;
! 1051: struct fd_formb *finfo;
! 1052: struct proc *p;
! 1053: {
! 1054: int rv = 0;
! 1055: struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)];
! 1056: struct fd_type *type = fd->sc_type;
! 1057: struct buf *bp;
! 1058: int fd_bsize = FD_BSIZE(fd);
! 1059:
! 1060: /* set up a buffer header for fdstrategy() */
! 1061: bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
! 1062: if (bp == NULL)
! 1063: return ENOBUFS;
! 1064:
! 1065: bzero((void *)bp, sizeof(struct buf));
! 1066: bp->b_flags = B_BUSY | B_PHYS | B_FORMAT;
! 1067: bp->b_proc = p;
! 1068: bp->b_dev = dev;
! 1069:
! 1070: /*
! 1071: * calculate a fake blkno, so fdstrategy() would initiate a
! 1072: * seek to the requested cylinder
! 1073: */
! 1074: bp->b_blkno = (finfo->cyl * (type->sectrac * type->heads)
! 1075: + finfo->head * type->sectrac) * fd_bsize / DEV_BSIZE;
! 1076:
! 1077: bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
! 1078: bp->b_data = (caddr_t)finfo;
! 1079:
! 1080: #ifdef DEBUG
! 1081: printf("fdformat: blkno %x count %x\n", bp->b_blkno, bp->b_bcount);
! 1082: #endif
! 1083:
! 1084: /* now do the format */
! 1085: fdstrategy(bp);
! 1086:
! 1087: /* ...and wait for it to complete */
! 1088: rv = biowait(bp);
! 1089: free(bp, M_TEMP);
! 1090: return (rv);
! 1091: }
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