File: [local] / sys / dev / isa / fd.c (download)
Revision 1.1, Tue Mar 4 16:11:19 2008 UTC (16 years, 1 month ago) by nbrk
Branch point for: MAIN
Initial revision
|
/* $OpenBSD: fd.c,v 1.67 2007/06/20 18:15:46 deraadt Exp $ */
/* $NetBSD: fd.c,v 1.90 1996/05/12 23:12:03 mycroft Exp $ */
/*-
* Copyright (c) 1993, 1994, 1995, 1996 Charles Hannum.
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Don Ahn.
*
* Portions Copyright (c) 1993, 1994 by
* jc@irbs.UUCP (John Capo)
* vak@zebub.msk.su (Serge Vakulenko)
* ache@astral.msk.su (Andrew A. Chernov)
* joerg_wunsch@uriah.sax.de (Joerg Wunsch)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)fd.c 7.4 (Berkeley) 5/25/91
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/dkstat.h>
#include <sys/disk.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/uio.h>
#include <sys/mtio.h>
#include <sys/proc.h>
#include <sys/syslog.h>
#include <sys/queue.h>
#include <sys/timeout.h>
#include <machine/cpu.h>
#include <machine/bus.h>
#include <machine/conf.h>
#include <machine/intr.h>
#include <machine/ioctl_fd.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>
#include <dev/isa/fdreg.h>
#if defined(__i386__) || defined(__amd64__) /* XXX */
#include <i386/isa/nvram.h>
#endif
#include <dev/isa/fdlink.h>
/* XXX misuse a flag to identify format operation */
#define B_FORMAT B_XXX
/* fd_type struct now in ioctl_fd.h */
/* The order of entries in the following table is important -- BEWARE! */
struct fd_type fd_types[] = {
{ 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,"1.44MB" }, /* 1.44MB diskette */
{ 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS, "1.2MB" }, /* 1.2 MB AT-diskettes */
{ 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS, "360KB/AT" }, /* 360kB in 1.2MB drive */
{ 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS, "360KB/PC" }, /* 360kB PC diskettes */
{ 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS, "720KB" }, /* 3.5" 720kB diskette */
{ 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS, "720KB/x" }, /* 720kB in 1.2MB drive */
{ 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS, "360KB/x" }, /* 360kB in 720kB drive */
{ 36,2,72,2,0xff,0xaf,0x1b,0x54,80,5760,1,FDC_500KBPS,"2.88MB" }, /* 2.88MB diskette */
{ 8,2,16,3,0xff,0xdf,0x35,0x74,77,1232,1,FDC_500KBPS,"1.2MB/[1024bytes/sector]" } /* 1.2 MB japanese format */
};
/* software state, per disk (with up to 4 disks per ctlr) */
struct fd_softc {
struct device sc_dev;
struct disk sc_dk;
struct fd_type *sc_deftype; /* default type descriptor */
struct fd_type *sc_type; /* current type descriptor */
daddr64_t sc_blkno; /* starting block number */
int sc_bcount; /* byte count left */
int sc_opts; /* user-set options */
int sc_skip; /* bytes already transferred */
int sc_nblks; /* number of blocks currently transferring */
int sc_nbytes; /* number of bytes currently transferring */
int sc_drive; /* physical unit number */
int sc_flags;
#define FD_OPEN 0x01 /* it's open */
#define FD_MOTOR 0x02 /* motor should be on */
#define FD_MOTOR_WAIT 0x04 /* motor coming up */
int sc_cylin; /* where we think the head is */
void *sc_sdhook; /* saved shutdown hook for drive. */
TAILQ_ENTRY(fd_softc) sc_drivechain;
int sc_ops; /* I/O ops since last switch */
struct buf sc_q; /* head of buf chain */
struct timeout fd_motor_on_to;
struct timeout fd_motor_off_to;
struct timeout fdtimeout_to;
};
/* floppy driver configuration */
int fdprobe(struct device *, void *, void *);
void fdattach(struct device *, struct device *, void *);
struct cfattach fd_ca = {
sizeof(struct fd_softc), fdprobe, fdattach
};
struct cfdriver fd_cd = {
NULL, "fd", DV_DISK
};
void fdgetdisklabel(struct fd_softc *);
int fd_get_parms(struct fd_softc *);
void fdstrategy(struct buf *);
void fdstart(struct fd_softc *);
int fdintr(struct fdc_softc *);
struct dkdriver fddkdriver = { fdstrategy };
void fd_set_motor(struct fdc_softc *fdc, int reset);
void fd_motor_off(void *arg);
void fd_motor_on(void *arg);
void fdfinish(struct fd_softc *fd, struct buf *bp);
int fdformat(dev_t, struct fd_formb *, struct proc *);
static __inline struct fd_type *fd_dev_to_type(struct fd_softc *, dev_t);
void fdretry(struct fd_softc *);
void fdtimeout(void *);
int
fdprobe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct fdc_softc *fdc = (void *)parent;
struct cfdata *cf = match;
struct fdc_attach_args *fa = aux;
int drive = fa->fa_drive;
bus_space_tag_t iot = fdc->sc_iot;
bus_space_handle_t ioh = fdc->sc_ioh;
int n;
if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != drive)
return 0;
/*
* XXX
* This is to work around some odd interactions between this driver
* and SMC Ethernet cards.
*/
if (cf->cf_loc[0] == -1 && drive >= 2)
return 0;
/*
* We want to keep the flags config gave us.
*/
fa->fa_flags = cf->cf_flags;
/* select drive and turn on motor */
bus_space_write_1(iot, ioh, fdout, drive | FDO_FRST | FDO_MOEN(drive));
/* wait for motor to spin up */
delay(250000);
out_fdc(iot, ioh, NE7CMD_RECAL);
out_fdc(iot, ioh, drive);
/* wait for recalibrate */
delay(2000000);
out_fdc(iot, ioh, NE7CMD_SENSEI);
n = fdcresult(fdc);
#ifdef FD_DEBUG
{
int i;
printf("fdprobe: status");
for (i = 0; i < n; i++)
printf(" %x", fdc->sc_status[i]);
printf("\n");
}
#endif
/* turn off motor */
delay(250000);
bus_space_write_1(iot, ioh, fdout, FDO_FRST);
/* flags & 0x20 forces the drive to be found even if it won't probe */
if (!(fa->fa_flags & 0x20) && (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20))
return 0;
return 1;
}
/*
* Controller is working, and drive responded. Attach it.
*/
void
fdattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct fdc_softc *fdc = (void *)parent;
struct fd_softc *fd = (void *)self;
struct fdc_attach_args *fa = aux;
struct fd_type *type = fa->fa_deftype;
int drive = fa->fa_drive;
if (!type || (fa->fa_flags & 0x10)) {
/* The config has overridden this. */
switch (fa->fa_flags & 0x07) {
case 1: /* 2.88MB */
type = &fd_types[7];
break;
case 2: /* 1.44MB */
type = &fd_types[0];
break;
case 3: /* 1.2MB */
type = &fd_types[1];
break;
case 4: /* 720K */
type = &fd_types[4];
break;
case 5: /* 360K */
type = &fd_types[3];
break;
case 6: /* 1.2 MB japanese format */
type = &fd_types[8];
break;
#ifdef __alpha__
default:
/* 1.44MB, how to detect others?
* idea from NetBSD -- jay@rootaction.net
*/
type = &fd_types[0];
#endif
}
}
if (type)
printf(": %s %d cyl, %d head, %d sec\n", type->name,
type->tracks, type->heads, type->sectrac);
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;
/*
* Initialize and attach the disk structure.
*/
fd->sc_dk.dk_name = fd->sc_dev.dv_xname;
fd->sc_dk.dk_driver = &fddkdriver;
disk_attach(&fd->sc_dk);
/* Needed to power off if the motor is on when we halt. */
fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd);
/* 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);
}
/*
* Translate nvram type into internal data structure. Return NULL for
* none/unknown/unusable.
*/
struct fd_type *
fd_nvtotype(fdc, nvraminfo, drive)
char *fdc;
int nvraminfo, drive;
{
#ifdef __alpha__
/* Alpha: assume 1.44MB, idea from NetBSD sys/dev/isa/fd.c
* -- jay@rootaction.net
*/
return &fd_types[0]; /* 1.44MB */
#else
int type;
type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0;
switch (type) {
case NVRAM_DISKETTE_NONE:
return NULL;
case NVRAM_DISKETTE_12M:
return &fd_types[1];
case NVRAM_DISKETTE_TYPE5:
case NVRAM_DISKETTE_TYPE6:
return &fd_types[7];
case NVRAM_DISKETTE_144M:
return &fd_types[0];
case NVRAM_DISKETTE_360K:
return &fd_types[3];
case NVRAM_DISKETTE_720K:
return &fd_types[4];
default:
printf("%s: drive %d: unknown device type 0x%x\n",
fdc, drive, type);
return NULL;
}
#endif
}
static __inline struct fd_type *
fd_dev_to_type(fd, dev)
struct fd_softc *fd;
dev_t dev;
{
int type = FDTYPE(dev);
if (type > (sizeof(fd_types) / sizeof(fd_types[0])))
return NULL;
return type ? &fd_types[type - 1] : fd->sc_deftype;
}
void
fdstrategy(bp)
register struct buf *bp; /* IO operation to perform */
{
struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(bp->b_dev)];
int sz;
int s;
int fd_bsize = FD_BSIZE(fd);
int bf = fd_bsize / DEV_BSIZE;
/* Valid unit, controller, and request? */
if (bp->b_blkno < 0 ||
(((bp->b_blkno % bf) != 0 ||
(bp->b_bcount % fd_bsize) != 0) &&
(bp->b_flags & B_FORMAT) == 0)) {
bp->b_error = EINVAL;
goto bad;
}
/* If it's a null transfer, return immediately. */
if (bp->b_bcount == 0)
goto done;
sz = howmany(bp->b_bcount, DEV_BSIZE);
if (bp->b_blkno + sz > fd->sc_type->size * bf) {
sz = fd->sc_type->size * bf - bp->b_blkno;
if (sz == 0)
/* If exactly at end of disk, return EOF. */
goto done;
if (sz < 0) {
/* If past end of disk, return EINVAL. */
bp->b_error = EINVAL;
goto bad;
}
/* Otherwise, truncate request. */
bp->b_bcount = sz << DEV_BSHIFT;
}
bp->b_cylinder = bp->b_blkno / (fd_bsize / DEV_BSIZE) / fd->sc_type->seccyl;
#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);
#endif
/* 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 */
if (!fd->sc_q.b_active)
fdstart(fd);
#ifdef DIAGNOSTIC
else {
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
if (fdc->sc_state == DEVIDLE) {
printf("fdstrategy: controller inactive\n");
fdcstart(fdc);
}
}
#endif
splx(s);
return;
bad:
bp->b_flags |= B_ERROR;
done:
/* Toss transfer; we're done early. */
bp->b_resid = bp->b_bcount;
s = splbio();
biodone(bp);
splx(s);
}
void
fdstart(fd)
struct fd_softc *fd;
{
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
int active = !TAILQ_EMPTY(&fdc->sc_link.fdlink.sc_drives);
/* Link into controller queue. */
fd->sc_q.b_active = 1;
TAILQ_INSERT_TAIL(&fdc->sc_link.fdlink.sc_drives, fd, sc_drivechain);
/* If controller not already active, start it. */
if (!active)
fdcstart(fdc);
}
void
fdfinish(fd, bp)
struct fd_softc *fd;
struct buf *bp;
{
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
splassert(IPL_BIO);
/*
* Move this drive to the end of the queue to give others a `fair'
* chance. We only force a switch if N operations are completed while
* another drive is waiting to be serviced, since there is a long motor
* startup delay whenever we switch.
*/
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);
if (bp->b_actf) {
TAILQ_INSERT_TAIL(&fdc->sc_link.fdlink.sc_drives, fd,
sc_drivechain);
} else
fd->sc_q.b_active = 0;
}
bp->b_resid = fd->sc_bcount;
fd->sc_skip = 0;
fd->sc_q.b_actf = bp->b_actf;
biodone(bp);
/* turn off motor 5s from now */
timeout_add(&fd->fd_motor_off_to, 5 * hz);
fdc->sc_state = DEVIDLE;
}
int
fdread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio));
}
int
fdwrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio));
}
void
fd_set_motor(fdc, reset)
struct fdc_softc *fdc;
int reset;
{
struct fd_softc *fd;
u_char status;
int n;
if ((fd = TAILQ_FIRST(&fdc->sc_link.fdlink.sc_drives)) != NULL)
status = fd->sc_drive;
else
status = 0;
if (!reset)
status |= FDO_FRST | FDO_FDMAEN;
for (n = 0; n < 4; n++)
if ((fd = fdc->sc_link.fdlink.sc_fd[n])
&& (fd->sc_flags & FD_MOTOR))
status |= FDO_MOEN(n);
bus_space_write_1(fdc->sc_iot, fdc->sc_ioh, fdout, status);
}
void
fd_motor_off(arg)
void *arg;
{
struct fd_softc *fd = arg;
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);
}
void
fd_motor_on(arg)
void *arg;
{
struct fd_softc *fd = arg;
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
int s;
s = splbio();
fd->sc_flags &= ~FD_MOTOR_WAIT;
if ((TAILQ_FIRST(&fdc->sc_link.fdlink.sc_drives) == fd)
&& (fdc->sc_state == MOTORWAIT))
(void) fdintr(fdc);
splx(s);
}
int
fdopen(dev, flags, mode, p)
dev_t dev;
int flags;
int mode;
struct proc *p;
{
int unit;
struct fd_softc *fd;
struct fd_type *type;
unit = FDUNIT(dev);
if (unit >= fd_cd.cd_ndevs)
return ENXIO;
fd = fd_cd.cd_devs[unit];
if (fd == 0)
return ENXIO;
type = fd_dev_to_type(fd, dev);
if (type == NULL)
return ENXIO;
if ((fd->sc_flags & FD_OPEN) != 0 &&
fd->sc_type != type)
return EBUSY;
fd->sc_type = type;
fd->sc_cylin = -1;
fd->sc_flags |= FD_OPEN;
return 0;
}
int
fdclose(dev, flags, mode, p)
dev_t dev;
int flags;
int mode;
struct proc *p;
{
struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)];
fd->sc_flags &= ~FD_OPEN;
fd->sc_opts &= ~FDOPT_NORETRY;
return 0;
}
daddr64_t
fdsize(dev)
dev_t dev;
{
/* Swapping to floppies would not make sense. */
return -1;
}
int
fddump(dev, blkno, va, size)
dev_t dev;
daddr64_t blkno;
caddr_t va;
size_t size;
{
/* Not implemented. */
return ENXIO;
}
/*
* Called from the controller.
*/
int
fdintr(fdc)
struct fdc_softc *fdc;
{
#define st0 fdc->sc_status[0]
#define cyl fdc->sc_status[1]
struct fd_softc *fd;
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;
int read, head, sec, i, nblks;
struct fd_type *type;
struct fd_formb *finfo = NULL;
int fd_bsize;
loop:
/* Is there a transfer to this drive? If not, deactivate drive. */
fd = TAILQ_FIRST(&fdc->sc_link.fdlink.sc_drives);
if (fd == NULL) {
fdc->sc_state = DEVIDLE;
return 1;
}
fd_bsize = FD_BSIZE(fd);
bp = fd->sc_q.b_actf;
if (bp == NULL) {
fd->sc_ops = 0;
TAILQ_REMOVE(&fdc->sc_link.fdlink.sc_drives, fd, sc_drivechain);
fd->sc_q.b_active = 0;
goto loop;
}
if (bp->b_flags & B_FORMAT)
finfo = (struct fd_formb *)bp->b_data;
switch (fdc->sc_state) {
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);
if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) {
fdc->sc_state = MOTORWAIT;
return 1;
}
if ((fd->sc_flags & FD_MOTOR) == 0) {
/* Turn on the motor, being careful about pairing. */
struct fd_softc *ofd =
fdc->sc_link.fdlink.sc_fd[fd->sc_drive ^ 1];
if (ofd && ofd->sc_flags & FD_MOTOR) {
timeout_del(&ofd->fd_motor_off_to);
ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
}
fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT;
fd_set_motor(fdc, 0);
fdc->sc_state = MOTORWAIT;
/* Allow .25s for motor to stabilize. */
timeout_add(&fd->fd_motor_on_to, hz / 4);
return 1;
}
/* Make sure the right drive is selected. */
fd_set_motor(fdc, 0);
/* FALLTHROUGH */
case DOSEEK:
doseek:
if (fd->sc_cylin == bp->b_cylinder)
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);
return 1;
case DOIO:
doio:
type = fd->sc_type;
if (finfo)
fd->sc_skip = (char *)&(finfo->fd_formb_cylno(0)) -
(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;
#ifdef DIAGNOSTIC
{int block;
block = (fd->sc_cylin * type->heads + head) * type->sectrac + sec;
if (block != fd->sc_blkno) {
printf("fdintr: block %d != blkno %d\n", block, fd->sc_blkno);
#ifdef DDB
Debugger();
#endif
}}
#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);
#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);
#endif
if (finfo) {
/* formatting */
if (out_fdc(iot, ioh, NE7CMD_FORMAT) < 0) {
fdc->sc_errors = 4;
fdretry(fd);
goto loop;
}
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);
} else {
if (read)
out_fdc(iot, ioh, NE7CMD_READ); /* READ */
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 */
}
fdc->sc_state = IOCOMPLETE;
disk_busy(&fd->sc_dk);
/* allow 2 seconds for operation */
timeout_add(&fd->fdtimeout_to, 2 * hz);
return 1; /* will return later */
case SEEKWAIT:
timeout_del(&fd->fdtimeout_to);
fdc->sc_state = SEEKCOMPLETE;
/* allow 1/50 second for heads to settle */
timeout_add(&fdc->fdcpseudointr_to, hz / 50);
return 1;
case SEEKCOMPLETE:
disk_unbusy(&fd->sc_dk, 0, 0); /* no data on seek */
/* Make sure seek really happened. */
out_fdc(iot, ioh, NE7CMD_SENSEI);
if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 ||
cyl != bp->b_cylinder * fd->sc_type->step) {
#ifdef FD_DEBUG
fdcstatus(&fd->sc_dev, 2, "seek failed");
#endif
fdretry(fd);
goto loop;
}
fd->sc_cylin = bp->b_cylinder;
goto doio;
case IOTIMEDOUT:
isadma_abort(fdc->sc_drq);
case SEEKTIMEDOUT:
case RECALTIMEDOUT:
case RESETTIMEDOUT:
fdretry(fd);
goto loop;
case IOCOMPLETE: /* IO DONE, post-analyze */
timeout_del(&fd->fdtimeout_to);
disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid),
(bp->b_flags & B_READ));
if (fdcresult(fdc) != 7 || (st0 & 0xf8) != 0) {
isadma_abort(fdc->sc_drq);
#ifdef FD_DEBUG
fdcstatus(&fd->sc_dev, 7, bp->b_flags & B_READ ?
"read failed" : "write failed");
printf("blkno %d nblks %d\n",
fd->sc_blkno, fd->sc_nblks);
#endif
fdretry(fd);
goto loop;
}
read = bp->b_flags & B_READ ? DMAMODE_READ : DMAMODE_WRITE;
isadma_done(fdc->sc_drq);
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;
}
fd->sc_blkno += fd->sc_nblks;
fd->sc_skip += fd->sc_nbytes;
fd->sc_bcount -= fd->sc_nbytes;
if (!finfo && fd->sc_bcount > 0) {
bp->b_cylinder = fd->sc_blkno / fd->sc_type->seccyl;
goto doseek;
}
fdfinish(fd, bp);
goto loop;
case DORESET:
/* 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);
return 1; /* will return later */
case RESETCOMPLETE:
timeout_del(&fd->fdtimeout_to);
/* clear the controller output buffer */
for (i = 0; i < 4; i++) {
out_fdc(iot, ioh, NE7CMD_SENSEI);
(void) fdcresult(fdc);
}
/* FALLTHROUGH */
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);
return 1; /* will return later */
case RECALWAIT:
timeout_del(&fd->fdtimeout_to);
fdc->sc_state = RECALCOMPLETE;
/* allow 1/30 second for heads to settle */
timeout_add(&fdc->fdcpseudointr_to, hz / 30);
return 1; /* will return later */
case RECALCOMPLETE:
out_fdc(iot, ioh, NE7CMD_SENSEI);
if (fdcresult(fdc) != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) {
#ifdef FD_DEBUG
fdcstatus(&fd->sc_dev, 2, "recalibrate failed");
#endif
fdretry(fd);
goto loop;
}
fd->sc_cylin = 0;
goto doseek;
case MOTORWAIT:
if (fd->sc_flags & FD_MOTOR_WAIT)
return 1; /* time's not up yet */
goto doseek;
default:
fdcstatus(&fd->sc_dev, 0, "stray interrupt");
return 1;
}
#ifdef DIAGNOSTIC
panic("fdintr: impossible");
#endif
#undef st0
#undef cyl
}
void
fdtimeout(arg)
void *arg;
{
struct fd_softc *fd = arg;
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
int s;
s = splbio();
#ifdef DEBUG
log(LOG_ERR,"fdtimeout: state %d\n", fdc->sc_state);
#endif
fdcstatus(&fd->sc_dev, 0, "timeout");
if (fd->sc_q.b_actf)
fdc->sc_state++;
else
fdc->sc_state = DEVIDLE;
(void) fdintr(fdc);
splx(s);
}
void
fdretry(fd)
struct fd_softc *fd;
{
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
struct buf *bp = fd->sc_q.b_actf;
if (fd->sc_opts & FDOPT_NORETRY)
goto fail;
switch (fdc->sc_errors) {
case 0:
/* try again */
fdc->sc_state = DOSEEK;
break;
case 1: case 2: case 3:
/* didn't work; try recalibrating */
fdc->sc_state = DORECAL;
break;
case 4:
/* still no go; reset the bastard */
fdc->sc_state = DORESET;
break;
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);
}
fdc->sc_errors++;
}
int
fdioctl(dev, cmd, addr, flag, p)
dev_t dev;
u_long cmd;
caddr_t addr;
int flag;
struct proc *p;
{
struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)];
struct disklabel dl, *lp = &dl;
char *errstring;
int error;
switch (cmd) {
case MTIOCTOP:
if (((struct mtop *)addr)->mt_op != MTOFFL)
return EIO;
return (0);
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);
if (errstring) {
/*printf("%s: %s\n", fd->sc_dev.dv_xname, errstring);*/
}
*(struct disklabel *)addr = *lp;
return 0;
case DIOCWLABEL:
if ((flag & FWRITE) == 0)
return EBADF;
/* XXX do something */
return 0;
case DIOCWDINFO:
if ((flag & FWRITE) == 0)
return EBADF;
error = setdisklabel(lp, (struct disklabel *)addr, 0);
if (error)
return error;
error = writedisklabel(DISKLABELDEV(dev), fdstrategy, lp);
return error;
case FD_FORM:
if((flag & FWRITE) == 0)
return EBADF; /* must be opened for writing */
else if(((struct fd_formb *)addr)->format_version !=
FD_FORMAT_VERSION)
return EINVAL; /* wrong version of formatting prog */
else
return fdformat(dev, (struct fd_formb *)addr, p);
break;
case FD_GTYPE: /* get drive type */
*(struct fd_type *)addr = *fd->sc_type;
return 0;
case FD_GOPTS: /* get drive options */
*(int *)addr = fd->sc_opts;
return 0;
case FD_SOPTS: /* set drive options */
fd->sc_opts = *(int *)addr;
return 0;
default:
return ENOTTY;
}
#ifdef DIAGNOSTIC
panic("fdioctl: impossible");
#endif
}
int
fdformat(dev, finfo, p)
dev_t dev;
struct fd_formb *finfo;
struct proc *p;
{
int rv = 0;
struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)];
struct fd_type *type = fd->sc_type;
struct buf *bp;
int fd_bsize = FD_BSIZE(fd);
/* set up a buffer header for fdstrategy() */
bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
if (bp == NULL)
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;
/*
* calculate a fake blkno, so fdstrategy() would initiate a
* seek to the requested cylinder
*/
bp->b_blkno = (finfo->cyl * (type->sectrac * type->heads)
+ 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;
#ifdef DEBUG
printf("fdformat: blkno %x count %x\n", bp->b_blkno, bp->b_bcount);
#endif
/* now do the format */
fdstrategy(bp);
/* ...and wait for it to complete */
rv = biowait(bp);
free(bp, M_TEMP);
return (rv);
}
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