root/dev/isa/fd.c

DEFINITIONS

1. fdprobe
2. fdattach
3. fd_nvtotype
4. fd_dev_to_type
5. fdstrategy
6. fdstart
7. fdfinish
8. fdread
9. fdwrite
10. fd_set_motor
11. fd_motor_off
12. fd_motor_on
13. fdopen
14. fdclose
15. fdsize
16. fddump
17. fdintr
18. fdtimeout
19. fdretry
20. fdioctl
21. fdformat

    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 $  */
    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  */
   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>
   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>
   69 #include <dev/isa/isavar.h>
   70 #include <dev/isa/isadmavar.h>
   71 #include <dev/isa/fdreg.h>
   73 #if defined(__i386__) || defined(__amd64__)     /* XXX */
   74 #include <i386/isa/nvram.h>
   75 #endif
   77 #include <dev/isa/fdlink.h>
   79 /* XXX misuse a flag to identify format operation */
   80 #define B_FORMAT B_XXX
   82 /* fd_type struct now in ioctl_fd.h */
   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 };
   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;
  102         struct fd_type *sc_deftype;     /* default type descriptor */
  103         struct fd_type *sc_type;        /* current type descriptor */
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 */
  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 */
  119         void *sc_sdhook;        /* saved shutdown hook for drive. */
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 };
  129 /* floppy driver configuration */
  130 int fdprobe(struct device *, void *, void *);
  131 void fdattach(struct device *, struct device *, void *);
  133 struct cfattach fd_ca = {
  134         sizeof(struct fd_softc), fdprobe, fdattach
  135 };
  137 struct cfdriver fd_cd = {
NULL, "fd", DV_DISK
  139 };
  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 *);
  147 struct dkdriver fddkdriver = { fdstrategy };
  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 *);
  158 int
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;
bus_space_tag_t iot = fdc->sc_iot;
bus_space_handle_t ioh = fdc->sc_ioh;
  169         int n;
  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;
  181         /*
  182          * We want to keep the flags config gave us.
  183          */
fa->fa_flags = cf->cf_flags;
  186         /* select drive and turn on motor */
bus_space_write_1(iot, ioh, fdout, drive | FDO_FRST | FDO_MOEN(drive));
  188         /* wait for motor to spin up */
delay(250000);
out_fdc(iot, ioh, NE7CMD_RECAL);
out_fdc(iot, ioh, drive);
  192         /* wait for recalibrate */
delay(2000000);
out_fdc(iot, ioh, NE7CMD_SENSEI);
n = fdcresult(fdc);
  196 #ifdef FD_DEBUG
  197         {
  198                 int i;
printf("fdprobe: status");
  200                 for (i = 0; i < n; i++)
printf(" %x", fdc->sc_status[i]);
printf("\n");
  203         }
  204 #endif
  206         /* turn off motor */
delay(250000);
bus_space_write_1(iot, ioh, fdout, FDO_FRST);
  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;
  214         return 1;
  215 }
  217 /*
  218  * Controller is working, and drive responded.  Attach it.
  219  */
  220 void
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;
  231         if (!type || (fa->fa_flags & 0x10)) {
  232                 /* The config has overridden this. */
  233                 switch (fa->fa_flags & 0x07) {
  234                 case 1: /* 2.88MB */
type = &fd_types[7];
  236                         break;
  237                 case 2: /* 1.44MB */
type = &fd_types[0];
  239                         break;
  240                 case 3: /* 1.2MB */
type = &fd_types[1];
  242                         break;
  243                 case 4: /* 720K */
type = &fd_types[4];
  245                         break;
  246                 case 5: /* 360K */
type = &fd_types[3];
  248                         break;
  249                 case 6: /* 1.2 MB japanese format */
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                          */
type = &fd_types[0];
  258 #endif
  259                 }
  260         }
  262         if (type)
printf(": %s %d cyl, %d head, %d sec\n", type->name,
type->tracks, type->heads, type->sectrac);
  265         else
printf(": density unknown\n");
fd->sc_cylin = -1;
fd->sc_drive = drive;
fd->sc_deftype = type;
fdc->sc_type[drive] = FDC_TYPE_DISK;
fdc->sc_link.fdlink.sc_fd[drive] = fd;
  274         /*
  275          * Initialize and attach the disk structure.
  276          */
fd->sc_dk.dk_name = fd->sc_dev.dv_xname;
fd->sc_dk.dk_driver = &fddkdriver;
disk_attach(&fd->sc_dk);
  281         /* Needed to power off if the motor is on when we halt. */
fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd);
  284         /* Setup timeout structures */
timeout_set(&fd->fd_motor_on_to, fd_motor_on, fd);
timeout_set(&fd->fd_motor_off_to, fd_motor_off, fd);
timeout_set(&fd->fdtimeout_to, fdtimeout, fd);
  288 }
  290 /*
  291  * Translate nvram type into internal data structure.  Return NULL for
  292  * none/unknown/unusable.
  293  */
  294 struct fd_type *
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;
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:
printf("%s: drive %d: unknown device type 0x%x\n",
fdc, drive, type);
  325                 return NULL;
  326         }
  327 #endif
  328 }
  330 static __inline struct fd_type *
fd_dev_to_type(fd, dev)
  332         struct fd_softc *fd;
dev_t dev;
  334 {
  335         int type = FDTYPE(dev);
  337         if (type > (sizeof(fd_types) / sizeof(fd_types[0])))
  338                 return NULL;
  339         return type ? &fd_types[type - 1] : fd->sc_deftype;
  340 }
  342 void
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;
  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)) {
bp->b_error = EINVAL;
  358                 goto bad;
  359         }
  361         /* If it's a null transfer, return immediately. */
  362         if (bp->b_bcount == 0)
  363                 goto done;
sz = howmany(bp->b_bcount, DEV_BSIZE);
  367         if (bp->b_blkno + sz > fd->sc_type->size * bf) {
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. */
bp->b_error = EINVAL;
  375                         goto bad;
  376                 }
  377                 /* Otherwise, truncate request. */
bp->b_bcount = sz << DEV_BSHIFT;
  379         }
bp->b_cylinder = bp->b_blkno / (fd_bsize / DEV_BSIZE) / fd->sc_type->seccyl;
  383 #ifdef FD_DEBUG
printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d sz %d\n",
bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylinder, sz);
  386 #endif
  388         /* Queue transfer on drive, activate drive and controller if idle. */
s = splbio();
disksort(&fd->sc_q, bp);
timeout_del(&fd->fd_motor_off_to); /* a good idea */
  392         if (!fd->sc_q.b_active)
fdstart(fd);
  394 #ifdef DIAGNOSTIC
  395         else {
  396                 struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
  397                 if (fdc->sc_state == DEVIDLE) {
printf("fdstrategy: controller inactive\n");
fdcstart(fdc);
  400                 }
  401         }
  402 #endif
splx(s);
  404         return;
bad:
bp->b_flags |= B_ERROR;
done:
  409         /* Toss transfer; we're done early. */
bp->b_resid = bp->b_bcount;
s = splbio();
biodone(bp);
splx(s);
  414 }
  416 void
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);
  423         /* Link into controller queue. */
fd->sc_q.b_active = 1;
TAILQ_INSERT_TAIL(&fdc->sc_link.fdlink.sc_drives, fd, sc_drivechain);
  427         /* If controller not already active, start it. */
  428         if (!active)
fdcstart(fdc);
  430 }
  432 void
fdfinish(fd, bp)
  434         struct fd_softc *fd;
  435         struct buf *bp;
  436 {
  437         struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
splassert(IPL_BIO);
  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) {
fd->sc_ops = 0;
TAILQ_REMOVE(&fdc->sc_link.fdlink.sc_drives, fd, sc_drivechain);
  450                 if (bp->b_actf) {
TAILQ_INSERT_TAIL(&fdc->sc_link.fdlink.sc_drives, fd,
sc_drivechain);
  453                 } else
fd->sc_q.b_active = 0;
  455         }
bp->b_resid = fd->sc_bcount;
fd->sc_skip = 0;
fd->sc_q.b_actf = bp->b_actf;
biodone(bp);
  461         /* turn off motor 5s from now */
timeout_add(&fd->fd_motor_off_to, 5 * hz);
fdc->sc_state = DEVIDLE;
  464 }
  466 int
  467 fdread(dev, uio, flags)
dev_t dev;
  469         struct uio *uio;
  470         int flags;
  471 {
  473         return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio));
  474 }
  476 int
  477 fdwrite(dev, uio, flags)
dev_t dev;
  479         struct uio *uio;
  480         int flags;
  481 {
  483         return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio));
  484 }
  486 void
fd_set_motor(fdc, reset)
  488         struct fdc_softc *fdc;
  489         int reset;
  490 {
  491         struct fd_softc *fd;
u_char status;
  493         int n;
  495         if ((fd = TAILQ_FIRST(&fdc->sc_link.fdlink.sc_drives)) != NULL)
status = fd->sc_drive;
  497         else
status = 0;
  499         if (!reset)
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))
status |= FDO_MOEN(n);
bus_space_write_1(fdc->sc_iot, fdc->sc_ioh, fdout, status);
  506 }
  508 void
fd_motor_off(arg)
  510         void *arg;
  511 {
  512         struct fd_softc *fd = arg;
  513         int s;
s = splbio();
fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
fd_set_motor((struct fdc_softc *)fd->sc_dev.dv_parent, 0);
splx(s);
  519 }
  521 void
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;
s = splbio();
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);
splx(s);
  535 }
  537 int
fdopen(dev, flags, mode, p)
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;
unit = FDUNIT(dev);
  549         if (unit >= fd_cd.cd_ndevs)
  550                 return ENXIO;
fd = fd_cd.cd_devs[unit];
  552         if (fd == 0)
  553                 return ENXIO;
type = fd_dev_to_type(fd, dev);
  555         if (type == NULL)
  556                 return ENXIO;
  558         if ((fd->sc_flags & FD_OPEN) != 0 &&
fd->sc_type != type)
  560                 return EBUSY;
fd->sc_type = type;
fd->sc_cylin = -1;
fd->sc_flags |= FD_OPEN;
  566         return 0;
  567 }
  569 int
  570 fdclose(dev, flags, mode, p)
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)];
fd->sc_flags &= ~FD_OPEN;
fd->sc_opts &= ~FDOPT_NORETRY;
  580         return 0;
  581 }
daddr64_t
  584 fdsize(dev)
dev_t dev;
  586 {
  588         /* Swapping to floppies would not make sense. */
  589         return -1;
  590 }
  592 int
  593 fddump(dev, blkno, va, size)
dev_t dev;
daddr64_t blkno;
caddr_t va;
size_t size;
  598 {
  600         /* Not implemented. */
  601         return ENXIO;
  602 }
  604 /*
  605  * Called from the controller.
  606  */
  607 int
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;
bus_space_tag_t iot = fdc->sc_iot;
bus_space_handle_t ioh = fdc->sc_ioh;
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;
loop:
  624         /* Is there a transfer to this drive?  If not, deactivate drive. */
fd = TAILQ_FIRST(&fdc->sc_link.fdlink.sc_drives);
  626         if (fd == NULL) {
fdc->sc_state = DEVIDLE;
  628                 return 1;
  629         }
fd_bsize = FD_BSIZE(fd);
bp = fd->sc_q.b_actf;
  633         if (bp == NULL) {
fd->sc_ops = 0;
TAILQ_REMOVE(&fdc->sc_link.fdlink.sc_drives, fd, sc_drivechain);
fd->sc_q.b_active = 0;
  637                 goto loop;
  638         }
  640         if (bp->b_flags & B_FORMAT)
finfo = (struct fd_formb *)bp->b_data;
  643         switch (fdc->sc_state) {
  644         case DEVIDLE:
fdc->sc_errors = 0;
fd->sc_skip = 0;
fd->sc_bcount = bp->b_bcount;
fd->sc_blkno = bp->b_blkno / (fd_bsize / DEV_BSIZE);
timeout_del(&fd->fd_motor_off_to);
  650                 if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) {
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 =
fdc->sc_link.fdlink.sc_fd[fd->sc_drive ^ 1];
  658                         if (ofd && ofd->sc_flags & FD_MOTOR) {
timeout_del(&ofd->fd_motor_off_to);
ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
  661                         }
fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT;
fd_set_motor(fdc, 0);
fdc->sc_state = MOTORWAIT;
  665                         /* Allow .25s for motor to stabilize. */
timeout_add(&fd->fd_motor_on_to, hz / 4);
  667                         return 1;
  668                 }
  669                 /* Make sure the right drive is selected. */
fd_set_motor(fdc, 0);
  672                 /* FALLTHROUGH */
  673         case DOSEEK:
doseek:
  675                 if (fd->sc_cylin == bp->b_cylinder)
  676                         goto doio;
out_fdc(iot, ioh, NE7CMD_SPECIFY);/* specify command */
out_fdc(iot, ioh, fd->sc_type->steprate);
out_fdc(iot, ioh, 6);           /* XXX head load time == 6ms */
out_fdc(iot, ioh, NE7CMD_SEEK); /* seek function */
out_fdc(iot, ioh, fd->sc_drive);        /* drive number */
out_fdc(iot, ioh, bp->b_cylinder * fd->sc_type->step);
fd->sc_cylin = -1;
fdc->sc_state = SEEKWAIT;
fd->sc_dk.dk_seek++;
disk_busy(&fd->sc_dk);
timeout_add(&fd->fdtimeout_to, 4 * hz);
  693                 return 1;
  695         case DOIO:
doio:
type = fd->sc_type;
  698                 if (finfo)
fd->sc_skip = (char *)&(finfo->fd_formb_cylno(0)) -
  700                         (char *)finfo;
sec = fd->sc_blkno % type->seccyl;
nblks = type->seccyl - sec;
nblks = min(nblks, fd->sc_bcount / fd_bsize);
nblks = min(nblks, FDC_MAXIOSIZE / fd_bsize);
fd->sc_nblks = nblks;
fd->sc_nbytes = finfo ? bp->b_bcount : nblks * fd_bsize;
head = sec / type->sectrac;
sec -= head * type->sectrac;
  709 #ifdef DIAGNOSTIC
  710                 {int block;
block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec;
  712                  if (block != fd->sc_blkno) {
printf("fdintr: block %d != blkno %d\n", block, fd->sc_blkno);
  714 #ifdef DDB
Debugger();
  716 #endif
  717                  }}
  718 #endif
read = bp->b_flags & B_READ ? DMAMODE_READ : DMAMODE_WRITE;
isadma_start(bp->b_data + fd->sc_skip, fd->sc_nbytes,
fdc->sc_drq, read);
bus_space_write_1(iot, ioh_ctl, fdctl, type->rate);
  723 #ifdef FD_DEBUG
printf("fdintr: %s drive %d track %d head %d sec %d nblks %d\n",
read ? "read" : "write", fd->sc_drive, fd->sc_cylin, head,
sec, nblks);
  727 #endif
  728                 if (finfo) {
  729                         /* formatting */
  730                         if (out_fdc(iot, ioh, NE7CMD_FORMAT) < 0) {
fdc->sc_errors = 4;
fdretry(fd);
  733                             goto loop;
  734                         }
out_fdc(iot, ioh, (head << 2) | fd->sc_drive);
out_fdc(iot, ioh, finfo->fd_formb_secshift);
out_fdc(iot, ioh, finfo->fd_formb_nsecs);
out_fdc(iot, ioh, finfo->fd_formb_gaplen);
out_fdc(iot, ioh, finfo->fd_formb_fillbyte);
  740                 } else {
  741                         if (read)
out_fdc(iot, ioh, NE7CMD_READ); /* READ */
  743                         else
out_fdc(iot, ioh, NE7CMD_WRITE);/* WRITE */
out_fdc(iot, ioh, (head << 2) | fd->sc_drive);
out_fdc(iot, ioh, fd->sc_cylin);        /* track */
out_fdc(iot, ioh, head);
out_fdc(iot, ioh, sec + 1);             /* sec +1 */
out_fdc(iot, ioh, type->secsize);       /* sec size */
out_fdc(iot, ioh, type->sectrac);       /* secs/track */
out_fdc(iot, ioh, type->gap1);          /* gap1 size */
out_fdc(iot, ioh, type->datalen);       /* data len */
  753                 }
fdc->sc_state = IOCOMPLETE;
disk_busy(&fd->sc_dk);
  758                 /* allow 2 seconds for operation */
timeout_add(&fd->fdtimeout_to, 2 * hz);
  760                 return 1;                               /* will return later */
  762         case SEEKWAIT:
timeout_del(&fd->fdtimeout_to);
fdc->sc_state = SEEKCOMPLETE;
  765                 /* allow 1/50 second for heads to settle */
timeout_add(&fdc->fdcpseudointr_to, hz / 50);
  767                 return 1;
  769         case SEEKCOMPLETE:
disk_unbusy(&fd->sc_dk, 0, 0);  /* no data on seek */
  772                 /* Make sure seek really happened. */
out_fdc(iot, ioh, NE7CMD_SENSEI);
  774                 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 ||
cyl != bp->b_cylinder * fd->sc_type->step) {
  776 #ifdef FD_DEBUG
fdcstatus(&fd->sc_dev, 2, "seek failed");
  778 #endif
fdretry(fd);
  780                         goto loop;
  781                 }
fd->sc_cylin = bp->b_cylinder;
  783                 goto doio;
  785         case IOTIMEDOUT:
isadma_abort(fdc->sc_drq);
  787         case SEEKTIMEDOUT:
  788         case RECALTIMEDOUT:
  789         case RESETTIMEDOUT:
fdretry(fd);
  791                 goto loop;
  793         case IOCOMPLETE: /* IO DONE, post-analyze */
timeout_del(&fd->fdtimeout_to);
disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid),
  797                     (bp->b_flags & B_READ));
  799                 if (fdcresult(fdc) != 7 || (st0 & 0xf8) != 0) {
isadma_abort(fdc->sc_drq);
  801 #ifdef FD_DEBUG
fdcstatus(&fd->sc_dev, 7, bp->b_flags & B_READ ?
  803                             "read failed" : "write failed");
printf("blkno %d nblks %d\n",
fd->sc_blkno, fd->sc_nblks);
  806 #endif
fdretry(fd);
  808                         goto loop;
  809                 }
read = bp->b_flags & B_READ ? DMAMODE_READ : DMAMODE_WRITE;
isadma_done(fdc->sc_drq);
  812                 if (fdc->sc_errors) {
diskerr(bp, "fd", "soft error", LOG_PRINTF,
fd->sc_skip / fd_bsize, (struct disklabel *)NULL);
printf("\n");
fdc->sc_errors = 0;
  817                 }
fd->sc_blkno += fd->sc_nblks;
fd->sc_skip += fd->sc_nbytes;
fd->sc_bcount -= fd->sc_nbytes;
  821                 if (!finfo && fd->sc_bcount > 0) {
bp->b_cylinder = fd->sc_blkno / fd->sc_type->seccyl;
  823                         goto doseek;
  824                 }
fdfinish(fd, bp);
  826                 goto loop;
  828         case DORESET:
  829                 /* try a reset, keep motor on */
fd_set_motor(fdc, 1);
delay(100);
fd_set_motor(fdc, 0);
fdc->sc_state = RESETCOMPLETE;
timeout_add(&fd->fdtimeout_to, hz / 2);
  835                 return 1;                       /* will return later */
  837         case RESETCOMPLETE:
timeout_del(&fd->fdtimeout_to);
  839                 /* clear the controller output buffer */
  840                 for (i = 0; i < 4; i++) {
out_fdc(iot, ioh, NE7CMD_SENSEI);
  842                         (void) fdcresult(fdc);
  843                 }
  845                 /* FALLTHROUGH */
  846         case DORECAL:
out_fdc(iot, ioh, NE7CMD_RECAL);        /* recal function */
out_fdc(iot, ioh, fd->sc_drive);
fdc->sc_state = RECALWAIT;
timeout_add(&fd->fdtimeout_to, 5 * hz);
  851                 return 1;                       /* will return later */
  853         case RECALWAIT:
timeout_del(&fd->fdtimeout_to);
fdc->sc_state = RECALCOMPLETE;
  856                 /* allow 1/30 second for heads to settle */
timeout_add(&fdc->fdcpseudointr_to, hz / 30);
  858                 return 1;                       /* will return later */
  860         case RECALCOMPLETE:
out_fdc(iot, ioh, NE7CMD_SENSEI);
  862                 if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) {
  863 #ifdef FD_DEBUG
fdcstatus(&fd->sc_dev, 2, "recalibrate failed");
  865 #endif
fdretry(fd);
  867                         goto loop;
  868                 }
fd->sc_cylin = 0;
  870                 goto doseek;
  872         case MOTORWAIT:
  873                 if (fd->sc_flags & FD_MOTOR_WAIT)
  874                         return 1;               /* time's not up yet */
  875                 goto doseek;
  877         default:
fdcstatus(&fd->sc_dev, 0, "stray interrupt");
  879                 return 1;
  880         }
  881 #ifdef DIAGNOSTIC
panic("fdintr: impossible");
  883 #endif
  884 #undef  st0
  885 #undef  cyl
  886 }
  888 void
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;
s = splbio();
  897 #ifdef DEBUG
log(LOG_ERR,"fdtimeout: state %d\n", fdc->sc_state);
  899 #endif
fdcstatus(&fd->sc_dev, 0, "timeout");
  902         if (fd->sc_q.b_actf)
fdc->sc_state++;
  904         else
fdc->sc_state = DEVIDLE;
  907         (void) fdintr(fdc);
splx(s);
  909 }
  911 void
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;
  918         if (fd->sc_opts & FDOPT_NORETRY)
  919             goto fail;
  920         switch (fdc->sc_errors) {
  921         case 0:
  922                 /* try again */
fdc->sc_state = DOSEEK;
  924                 break;
  926         case 1: case 2: case 3:
  927                 /* didn't work; try recalibrating */
fdc->sc_state = DORECAL;
  929                 break;
  931         case 4:
  932                 /* still no go; reset the bastard */
fdc->sc_state = DORESET;
  934                 break;
  936         default:
fail:
diskerr(bp, "fd", "hard error", LOG_PRINTF,
fd->sc_skip / FD_BSIZE(fd), (struct disklabel *)NULL);
printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n",
fdc->sc_status[0], NE7_ST0BITS,
fdc->sc_status[1], NE7_ST1BITS,
fdc->sc_status[2], NE7_ST2BITS,
fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]);
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
fdfinish(fd, bp);
  949         }
fdc->sc_errors++;
  951 }
  953 int
  954 fdioctl(dev, cmd, addr, flag, p)
dev_t dev;
u_long cmd;
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;
  966         switch (cmd) {
  967         case MTIOCTOP:
  968                 if (((struct mtop *)addr)->mt_op != MTOFFL)
  969                         return EIO;
  970                 return (0);
  971         case DIOCGDINFO:
bzero(lp, sizeof(*lp));
lp->d_secsize = FD_BSIZE(fd);
lp->d_secpercyl = fd->sc_type->seccyl;
lp->d_ntracks = fd->sc_type->heads;
lp->d_nsectors = fd->sc_type->sectrac;
lp->d_ncylinders = fd->sc_type->tracks;
strncpy(lp->d_typename, "floppy disk", sizeof lp->d_typename);
lp->d_type = DTYPE_FLOPPY;
strncpy(lp->d_packname, "fictitious", sizeof lp->d_packname);
DL_SETDSIZE(lp, fd->sc_type->size);
lp->d_rpm = 300;
lp->d_interleave = 1;
lp->d_version = 1;
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = dkcksum(lp);
errstring = readdisklabel(DISKLABELDEV(dev), fdstrategy, lp, 0);
  993                 if (errstring) {
  994                         /*printf("%s: %s\n", fd->sc_dev.dv_xname, errstring);*/
  995                 }
  997                 *(struct disklabel *)addr = *lp;
  998                 return 0;
 1000         case DIOCWLABEL:
 1001                 if ((flag & FWRITE) == 0)
 1002                         return EBADF;
 1003                 /* XXX do something */
 1004                 return 0;
 1006         case DIOCWDINFO:
 1007                 if ((flag & FWRITE) == 0)
 1008                         return EBADF;
error = setdisklabel(lp, (struct disklabel *)addr, 0);
 1011                 if (error)
 1012                         return error;
error = writedisklabel(DISKLABELDEV(dev), fdstrategy, lp);
 1015                 return error;
 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 !=
FD_FORMAT_VERSION)
 1022                         return EINVAL; /* wrong version of formatting prog */
 1023                 else
 1024                         return fdformat(dev, (struct fd_formb *)addr, p);
 1025                 break;
 1027         case FD_GTYPE:                  /* get drive type */
 1028                 *(struct fd_type *)addr = *fd->sc_type;
 1029                 return 0;
 1031         case FD_GOPTS:                  /* get drive options */
 1032                 *(int *)addr = fd->sc_opts;
 1033                 return 0;
 1035         case FD_SOPTS:                  /* set drive options */
fd->sc_opts = *(int *)addr;
 1037                 return 0;
 1039         default:
 1040                 return ENOTTY;
 1041         }
 1043 #ifdef DIAGNOSTIC
panic("fdioctl: impossible");
 1045 #endif
 1046 }
 1048 int
fdformat(dev, finfo, p)
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);
 1060         /* set up a buffer header for fdstrategy() */
bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
 1062         if (bp == NULL)
 1063                 return ENOBUFS;
bzero((void *)bp, sizeof(struct buf));
bp->b_flags = B_BUSY | B_PHYS | B_FORMAT;
bp->b_proc = p;
bp->b_dev = dev;
 1070         /*
 1071          * calculate a fake blkno, so fdstrategy() would initiate a
 1072          * seek to the requested cylinder
 1073          */
bp->b_blkno = (finfo->cyl * (type->sectrac * type->heads)
 1075                 + finfo->head * type->sectrac) * fd_bsize / DEV_BSIZE;
bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
bp->b_data = (caddr_t)finfo;
 1080 #ifdef DEBUG
printf("fdformat: blkno %x count %x\n", bp->b_blkno, bp->b_bcount);
 1082 #endif
 1084         /* now do the format */
fdstrategy(bp);
 1087         /* ...and wait for it to complete */
rv = biowait(bp);
free(bp, M_TEMP);
 1090         return (rv);
 1091 }