Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
ae90c838ab
NetBSD/sys/dev/isa/fd.c
mycroft c82b47f9bc Fix a non-fatal race condition.
2003-09-27 15:56:03 +00:00

1580 lines
39 KiB
C
Raw Blame History

/* $NetBSD: fd.c,v 1.50 2003/09/27 15:56:03 mycroft Exp $ */
/*-
* Copyright (c) 1998, 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*-
* 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.
*
* 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
*/
/*
* Floppy formatting facilities merged from FreeBSD fd.c driver:
* Id: fd.c,v 1.53 1995/03/12 22:40:56 joerg Exp
* which carries the same copyright/redistribution notice as shown above with
* the addition of the following statement before the "Redistribution and
* use ..." clause:
*
* Copyright (c) 1993, 1994 by
* jc@irbs.UUCP (John Capo)
* vak@zebub.msk.su (Serge Vakulenko)
* ache@astral.msk.su (Andrew A. Chernov)
*
* Copyright (c) 1993, 1994, 1995 by
* joerg_wunsch@uriah.sax.de (Joerg Wunsch)
* dufault@hda.com (Peter Dufault)
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: fd.c,v 1.50 2003/09/27 15:56:03 mycroft Exp $");
#include "rnd.h"
#include "opt_ddb.h"
/*
* XXX This driver should be properly MI'd some day, but this allows us
* XXX to eliminate a lot of code duplication for now.
*/
#if !defined(alpha) && !defined(algor) && !defined(atari) && \
!defined(bebox) && !defined(evbmips) && !defined(i386) && \
!defined(prep) && !defined(sandpoint) && !defined(x86_64)
#error platform not supported by this driver, yet
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/uio.h>
#include <sys/syslog.h>
#include <sys/queue.h>
#include <sys/proc.h>
#include <sys/fdio.h>
#include <sys/conf.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#include <uvm/uvm_extern.h>
#include <dev/cons.h>
#include <machine/cpu.h>
#include <machine/bus.h>
#if defined(atari)
/*
* On the atari, it is configured as fdcisa
*/
#define FDCCF_DRIVE FDCISACF_DRIVE
#define FDCCF_DRIVE_DEFAULT FDCISACF_DRIVE_DEFAULT
#define fd_cd fdisa_cd
#endif /* atari */
#include <machine/intr.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>
#include <dev/isa/fdreg.h>
#include <dev/isa/fdcvar.h>
#if defined(i386)
#include <dev/ic/mc146818reg.h> /* for NVRAM access */
#include <i386/isa/nvram.h>
#include "mca.h"
#if NMCA > 0
#include <machine/mca_machdep.h> /* for MCA_system */
#endif
#endif /* i386 */
#include <dev/isa/fdvar.h>
#define FDUNIT(dev) (minor(dev) / 8)
#define FDTYPE(dev) (minor(dev) % 8)
/* XXX misuse a flag to identify format operation */
#define B_FORMAT B_XXX
/* controller driver configuration */
int fdprint __P((void *, const char *));
#if NMCA > 0
/* MCA - specific entries */
const struct fd_type mca_fd_types[] = {
{ 18,2,36,2,0xff,0x0f,0x1b,0x6c,80,2880,1,FDC_500KBPS,0xf6,1, "1.44MB" }, /* 1.44MB diskette - XXX try 16ms step rate */
{ 9,2,18,2,0xff,0x4f,0x2a,0x50,80,1440,1,FDC_250KBPS,0xf6,1, "720KB" }, /* 3.5 inch 720kB diskette - XXX try 24ms step rate */
};
#endif /* NMCA > 0 */
/* The order of entries in the following table is important -- BEWARE! */
#if defined(atari)
const struct fd_type fd_types[] = {
{ 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,0xf6,1, "360KB/PC" }, /* 360kB PC diskettes */
{ 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,0xf6,1, "720KB" }, /* 3.5 inch 720kB diskette */
{ 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,0xf6,1, "1.44MB" }, /* 1.44MB diskette */
};
#else
const struct fd_type fd_types[] = {
{ 18,2,36,2,0xff,0xcf,0x1b,0x6c,80,2880,1,FDC_500KBPS,0xf6,1, "1.44MB" }, /* 1.44MB diskette */
{ 15,2,30,2,0xff,0xdf,0x1b,0x54,80,2400,1,FDC_500KBPS,0xf6,1, "1.2MB" }, /* 1.2 MB AT-diskettes */
{ 9,2,18,2,0xff,0xdf,0x23,0x50,40, 720,2,FDC_300KBPS,0xf6,1, "360KB/AT" }, /* 360kB in 1.2MB drive */
{ 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,1,FDC_250KBPS,0xf6,1, "360KB/PC" }, /* 360kB PC diskettes */
{ 9,2,18,2,0xff,0xdf,0x2a,0x50,80,1440,1,FDC_250KBPS,0xf6,1, "720KB" }, /* 3.5 inch 720kB diskette */
{ 9,2,18,2,0xff,0xdf,0x23,0x50,80,1440,1,FDC_300KBPS,0xf6,1, "720KB/x" }, /* 720kB in 1.2MB drive */
{ 9,2,18,2,0xff,0xdf,0x2a,0x50,40, 720,2,FDC_250KBPS,0xf6,1, "360KB/x" }, /* 360kB in 720kB drive */
};
#endif /* defined(atari) */
void fdcfinishattach __P((struct device *));
int fdprobe __P((struct device *, struct cfdata *, void *));
void fdattach __P((struct device *, struct device *, void *));
extern struct cfdriver fd_cd;
#ifdef atari
CFATTACH_DECL(fdisa, sizeof(struct fd_softc),
fdprobe, fdattach, NULL, NULL);
#else
CFATTACH_DECL(fd, sizeof(struct fd_softc),
fdprobe, fdattach, NULL, NULL);
#endif
dev_type_open(fdopen);
dev_type_close(fdclose);
dev_type_read(fdread);
dev_type_write(fdwrite);
dev_type_ioctl(fdioctl);
dev_type_strategy(fdstrategy);
const struct bdevsw fd_bdevsw = {
fdopen, fdclose, fdstrategy, fdioctl, nodump, nosize, D_DISK
};
const struct cdevsw fd_cdevsw = {
fdopen, fdclose, fdread, fdwrite, fdioctl,
nostop, notty, nopoll, nommap, nokqfilter, D_DISK
};
void fdgetdisklabel __P((struct fd_softc *));
int fd_get_parms __P((struct fd_softc *));
void fdstart __P((struct fd_softc *));
struct dkdriver fddkdriver = { fdstrategy };
#if defined(i386)
const struct fd_type *fd_nvtotype __P((char *, int, int));
#endif /* i386 */
void fd_set_motor __P((struct fdc_softc *fdc, int reset));
void fd_motor_off __P((void *arg));
void fd_motor_on __P((void *arg));
int fdcresult __P((struct fdc_softc *fdc));
void fdcstart __P((struct fdc_softc *fdc));
void fdcstatus __P((struct device *dv, int n, char *s));
void fdctimeout __P((void *arg));
void fdcpseudointr __P((void *arg));
void fdcretry __P((struct fdc_softc *fdc));
void fdfinish __P((struct fd_softc *fd, struct buf *bp));
__inline const struct fd_type *fd_dev_to_type __P((struct fd_softc *, dev_t));
int fdformat __P((dev_t, struct ne7_fd_formb *, struct proc *));
void fd_mountroot_hook __P((struct device *));
/*
* Arguments passed between fdcattach and fdprobe.
*/
struct fdc_attach_args {
int fa_drive;
const struct fd_type *fa_deftype;
};
/*
* Print the location of a disk drive (called just before attaching the
* the drive). If `fdc' is not NULL, the drive was found but was not
* in the system config file; print the drive name as well.
* Return QUIET (config_find ignores this if the device was configured) to
* avoid printing `fdN not configured' messages.
*/
int
fdprint(aux, fdc)
void *aux;
const char *fdc;
{
register struct fdc_attach_args *fa = aux;
if (!fdc)
aprint_normal(" drive %d", fa->fa_drive);
return QUIET;
}
void
fdcattach(fdc)
struct fdc_softc *fdc;
{
callout_init(&fdc->sc_timo_ch);
callout_init(&fdc->sc_intr_ch);
fdc->sc_state = DEVIDLE;
TAILQ_INIT(&fdc->sc_drives);
fdc->sc_maxiosize = isa_dmamaxsize(fdc->sc_ic, fdc->sc_drq);
if (isa_drq_alloc(fdc->sc_ic, fdc->sc_drq) != 0) {
printf("%s: can't reserve drq %d\n",
fdc->sc_dev.dv_xname, fdc->sc_drq);
return;
}
if (isa_dmamap_create(fdc->sc_ic, fdc->sc_drq, fdc->sc_maxiosize,
BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) {
printf("%s: can't set up ISA DMA map\n",
fdc->sc_dev.dv_xname);
return;
}
config_interrupts(&fdc->sc_dev, fdcfinishattach);
}
void
fdcfinishattach(self)
struct device *self;
{
struct fdc_softc *fdc = (void *)self;
bus_space_tag_t iot = fdc->sc_iot;
bus_space_handle_t ioh = fdc->sc_ioh;
struct fdc_attach_args fa;
#if defined(i386)
int type;
#endif
/*
* Reset the controller to get it into a known state. Not all
* probes necessarily need do this to discover the controller up
* front, so don't assume anything.
*/
bus_space_write_1(iot, ioh, fdout, 0);
delay(100);
bus_space_write_1(iot, ioh, fdout, FDO_FRST);
/* see if it can handle a command */
if (out_fdc(iot, ioh, NE7CMD_SPECIFY) < 0) {
printf ("%s: can't reset controller\n", fdc->sc_dev.dv_xname);
return;
}
out_fdc(iot, ioh, 0xdf);
out_fdc(iot, ioh, 2);
#if defined(i386)
/*
* The NVRAM info only tells us about the first two disks on the
* `primary' floppy controller.
*/
if (fdc->sc_dev.dv_unit == 0)
type = mc146818_read(NULL, NVRAM_DISKETTE); /* XXX softc */
else
type = -1;
#endif /* i386 */
/* physical limit: four drives per controller. */
fdc->sc_state = PROBING;
for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) {
if (fdc->sc_known) {
if (fdc->sc_present & (1 << fa.fa_drive)) {
fa.fa_deftype = fdc->sc_knownfds[fa.fa_drive];
config_found(&fdc->sc_dev, (void *)&fa,
fdprint);
}
} else {
#if defined(i386)
if (type >= 0 && fa.fa_drive < 2)
fa.fa_deftype = fd_nvtotype(fdc->sc_dev.dv_xname,
type, fa.fa_drive);
else
fa.fa_deftype = NULL; /* unknown */
#elif defined(atari)
/*
* Atari has a different ordening, defaults to 1.44
*/
fa.fa_deftype = &fd_types[2];
#else
/*
* Default to 1.44MB on Alpha and BeBox. How do we tell
* on these platforms?
*/
fa.fa_deftype = &fd_types[0];
#endif /* i386 */
(void)config_found(&fdc->sc_dev, (void *)&fa, fdprint);
}
}
fdc->sc_state = DEVIDLE;
}
int
fdprobe(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *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;
int s;
if (cf->cf_loc[FDCCF_DRIVE] != FDCCF_DRIVE_DEFAULT &&
cf->cf_loc[FDCCF_DRIVE] != drive)
return 0;
/*
* XXX
* This is to work around some odd interactions between this driver
* and SMC Ethernet cards.
*/
if (cf->cf_loc[FDCCF_DRIVE] == FDCCF_DRIVE_DEFAULT && drive >= 2)
return 0;
/* Use PNP information if available */
if (fdc->sc_known)
return 1;
s = splbio();
/* toss any interrupt status */
for (n = 0; n < 4; n++) {
out_fdc(iot, ioh, NE7CMD_SENSEI);
(void) fdcresult(fdc);
}
/* 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 */
(void) tsleep(fdc, PWAIT, "fdprobe1", hz / 4);
out_fdc(iot, ioh, NE7CMD_RECAL);
out_fdc(iot, ioh, drive);
/* wait for recalibrate, up to 2s */
if (tsleep(fdc, PWAIT, "fdprobe2", 2 * hz) != EWOULDBLOCK)
/*XXX*/ printf("fdprobe: got intr\n");
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 */
bus_space_write_1(iot, ioh, fdout, FDO_FRST);
splx(s);
#if defined(bebox) /* XXX What is this about? --thorpej@netbsd.org */
if (n != 2 || (fdc->sc_status[1] != 0))
return 0;
#else
if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20)
return 0;
#endif /* bebox */
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;
const struct fd_type *type = fa->fa_deftype;
int drive = fa->fa_drive;
callout_init(&fd->sc_motoron_ch);
callout_init(&fd->sc_motoroff_ch);
/* XXX Allow `flags' to override device type? */
if (type)
printf(": %s, %d cyl, %d head, %d sec\n", type->name,
type->cyls, type->heads, type->sectrac);
else
printf(": density unknown\n");
bufq_alloc(&fd->sc_q, BUFQ_DISKSORT|BUFQ_SORT_CYLINDER);
fd->sc_cylin = -1;
fd->sc_drive = drive;
fd->sc_deftype = type;
fdc->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);
/*
* Establish a mountroot hook.
*/
mountroothook_establish(fd_mountroot_hook, &fd->sc_dev);
/* Needed to power off if the motor is on when we halt. */
fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd);
#if NRND > 0
rnd_attach_source(&fd->rnd_source, fd->sc_dev.dv_xname,
RND_TYPE_DISK, 0);
#endif
}
#if defined(i386)
/*
* Translate nvram type into internal data structure. Return NULL for
* none/unknown/unusable.
*/
const struct fd_type *
fd_nvtotype(fdc, nvraminfo, drive)
char *fdc;
int nvraminfo, drive;
{
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:
/* XXX We really ought to handle 2.88MB format. */
case NVRAM_DISKETTE_144M:
#if NMCA > 0
if (MCA_system)
return &mca_fd_types[0];
else
#endif /* NMCA > 0 */
return &fd_types[0];
case NVRAM_DISKETTE_360K:
return &fd_types[3];
case NVRAM_DISKETTE_720K:
#if NMCA > 0
if (MCA_system)
return &mca_fd_types[1];
else
#endif /* NMCA > 0 */
return &fd_types[4];
default:
printf("%s: drive %d: unknown device type 0x%x\n",
fdc, drive, type);
return NULL;
}
}
#endif /* i386 */
__inline const struct fd_type *
fd_dev_to_type(fd, dev)
struct fd_softc *fd;
dev_t dev;
{
u_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 = device_lookup(&fd_cd, FDUNIT(bp->b_dev));
int sz;
int s;
/* Valid unit, controller, and request? */
if (bp->b_blkno < 0 ||
((bp->b_bcount % FDC_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, FDC_BSIZE);
if (bp->b_blkno + sz > fd->sc_type->size) {
sz = fd->sc_type->size - 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_rawblkno = bp->b_blkno;
bp->b_cylinder =
bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl;
#ifdef FD_DEBUG
printf("fdstrategy: b_blkno %d b_bcount %ld blkno %d cylin %ld 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();
BUFQ_PUT(&fd->sc_q, bp);
callout_stop(&fd->sc_motoroff_ch); /* a good idea */
if (fd->sc_active == 0)
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;
biodone(bp);
}
void
fdstart(fd)
struct fd_softc *fd;
{
struct fdc_softc *fdc = (void *)fd->sc_dev.dv_parent;
int active = !TAILQ_EMPTY(&fdc->sc_drives);
/* Link into controller queue. */
fd->sc_active = 1;
TAILQ_INSERT_TAIL(&fdc->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;
/*
* 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.
*/
(void)BUFQ_GET(&fd->sc_q);
if (TAILQ_NEXT(fd, sc_drivechain) && ++fd->sc_ops >= 8) {
fd->sc_ops = 0;
TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
if (BUFQ_PEEK(&fd->sc_q) != NULL)
TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain);
else
fd->sc_active = 0;
}
bp->b_resid = fd->sc_bcount;
fd->sc_skip = 0;
#if NRND > 0
rnd_add_uint32(&fd->rnd_source, bp->b_blkno);
#endif
biodone(bp);
/* turn off motor 5s from now */
callout_reset(&fd->sc_motoroff_ch, 5 * hz, fd_motor_off, fd);
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_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_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_drives) == fd) &&(fdc->sc_state == MOTORWAIT))
(void) fdcintr(fdc);
splx(s);
}
int
fdcresult(fdc)
struct fdc_softc *fdc;
{
bus_space_tag_t iot = fdc->sc_iot;
bus_space_handle_t ioh = fdc->sc_ioh;
u_char i;
u_int j = 100000,
n = 0;
for (; j; j--) {
i = bus_space_read_1(iot, ioh, fdsts) &
(NE7_DIO | NE7_RQM | NE7_CB);
if (i == NE7_RQM)
return n;
if (i == (NE7_DIO | NE7_RQM | NE7_CB)) {
if (n >= sizeof(fdc->sc_status)) {
log(LOG_ERR, "fdcresult: overrun\n");
return -1;
}
fdc->sc_status[n++] =
bus_space_read_1(iot, ioh, fddata);
}
delay(10);
}
log(LOG_ERR, "fdcresult: timeout\n");
return -1;
}
int
out_fdc(iot, ioh, x)
bus_space_tag_t iot;
bus_space_handle_t ioh;
u_char x;
{
u_char i;
u_int j = 100000;
for (; j; j--) {
i = bus_space_read_1(iot, ioh, fdsts) &
(NE7_DIO | NE7_RQM);
if (i == NE7_RQM) {
bus_space_write_1(iot, ioh, fddata, x);
return 0;
}
delay(10);
}
return -1;
}
int
fdopen(dev, flags, mode, p)
dev_t dev;
int flags;
int mode;
struct proc *p;
{
struct fd_softc *fd;
const struct fd_type *type;
fd = device_lookup(&fd_cd, FDUNIT(dev));
if (fd == NULL)
return (ENXIO);
type = fd_dev_to_type(fd, dev);
if (type == NULL)
return ENXIO;
if ((fd->sc_flags & FD_OPEN) != 0 &&
memcmp(fd->sc_type, type, sizeof(*type)))
return EBUSY;
fd->sc_type_copy = *type;
fd->sc_type = &fd->sc_type_copy;
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 = device_lookup(&fd_cd, FDUNIT(dev));
fd->sc_flags &= ~FD_OPEN;
fd->sc_opts &= ~(FDOPT_NORETRY|FDOPT_SILENT);
return 0;
}
void
fdcstart(fdc)
struct fdc_softc *fdc;
{
#ifdef DIAGNOSTIC
/* only got here if controller's drive queue was inactive; should
be in idle state */
if (fdc->sc_state != DEVIDLE) {
printf("fdcstart: not idle\n");
return;
}
#endif
(void) fdcintr(fdc);
}
void
fdcstatus(dv, n, s)
struct device *dv;
int n;
char *s;
{
struct fdc_softc *fdc = (void *)dv->dv_parent;
char bits[64];
if (n == 0) {
out_fdc(fdc->sc_iot, fdc->sc_ioh, NE7CMD_SENSEI);
(void) fdcresult(fdc);
n = 2;
}
printf("%s: %s", dv->dv_xname, s);
switch (n) {
case 0:
printf("\n");
break;
case 2:
printf(" (st0 %s cyl %d)\n",
bitmask_snprintf(fdc->sc_status[0], NE7_ST0BITS,
bits, sizeof(bits)), fdc->sc_status[1]);
break;
case 7:
printf(" (st0 %s", bitmask_snprintf(fdc->sc_status[0],
NE7_ST0BITS, bits, sizeof(bits)));
printf(" st1 %s", bitmask_snprintf(fdc->sc_status[1],
NE7_ST1BITS, bits, sizeof(bits)));
printf(" st2 %s", bitmask_snprintf(fdc->sc_status[2],
NE7_ST2BITS, bits, sizeof(bits)));
printf(" cyl %d head %d sec %d)\n",
fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]);
break;
#ifdef DIAGNOSTIC
default:
printf("\nfdcstatus: weird size");
break;
#endif
}
}
void
fdctimeout(arg)
void *arg;
{
struct fdc_softc *fdc = arg;
struct fd_softc *fd = TAILQ_FIRST(&fdc->sc_drives);
int s;
s = splbio();
#ifdef DEBUG
log(LOG_ERR, "fdctimeout: state %d\n", fdc->sc_state);
#endif
fdcstatus(&fd->sc_dev, 0, "timeout");
if (BUFQ_PEEK(&fd->sc_q) != NULL)
fdc->sc_state++;
else
fdc->sc_state = DEVIDLE;
(void) fdcintr(fdc);
splx(s);
}
void
fdcpseudointr(arg)
void *arg;
{
int s;
/* Just ensure it has the right spl. */
s = splbio();
(void) fdcintr(arg);
splx(s);
}
int
fdcintr(arg)
void *arg;
{
struct fdc_softc *fdc = arg;
#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;
int read, head, sec, i, nblks;
struct fd_type *type;
struct ne7_fd_formb *finfo = NULL;
if (fdc->sc_state == PROBING) {
/*XXX*/ printf("got probe interrupt\n");
wakeup(fdc);
return 1;
}
loop:
/* Is there a drive for the controller to do a transfer with? */
fd = TAILQ_FIRST(&fdc->sc_drives);
if (fd == NULL) {
fdc->sc_state = DEVIDLE;
return 1;
}
/* Is there a transfer to this drive? If not, deactivate drive. */
bp = BUFQ_PEEK(&fd->sc_q);
if (bp == NULL) {
fd->sc_ops = 0;
TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
fd->sc_active = 0;
goto loop;
}
if (bp->b_flags & B_FORMAT)
finfo = (struct ne7_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 / (FDC_BSIZE / DEV_BSIZE);
callout_stop(&fd->sc_motoroff_ch);
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_fd[fd->sc_drive ^ 1];
if (ofd && ofd->sc_flags & FD_MOTOR) {
callout_stop(&ofd->sc_motoroff_ch);
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. */
callout_reset(&fd->sc_motoron_ch, hz / 4,
fd_motor_on, fd);
return 1;
}
/* Make sure the right drive is selected. */
fd_set_motor(fdc, 0);
/* fall through */
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);
callout_reset(&fdc->sc_timo_ch, 4 * hz, fdctimeout, fdc);
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 / FDC_BSIZE);
nblks = min(nblks, fdc->sc_maxiosize / FDC_BSIZE);
fd->sc_nblks = nblks;
fd->sc_nbytes = finfo ? bp->b_bcount : nblks * FDC_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("fdcintr: block %d != blkno "
"%" PRId64 "\n", block, fd->sc_blkno);
#ifdef DDB
Debugger();
#endif
}
}
#endif
read = bp->b_flags & B_READ ? DMAMODE_READ : DMAMODE_WRITE;
isa_dmastart(fdc->sc_ic, fdc->sc_drq,
bp->b_data + fd->sc_skip, fd->sc_nbytes,
NULL, read | DMAMODE_DEMAND, BUS_DMA_NOWAIT);
bus_space_write_1(iot, fdc->sc_fdctlioh, 0, type->rate);
#ifdef FD_DEBUG
printf("fdcintr: %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;
fdcretry(fdc);
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); /* sector +1 */
out_fdc(iot, ioh, type->secsize);/* sector size */
out_fdc(iot, ioh, type->sectrac);/* sectors/track */
out_fdc(iot, ioh, type->gap1); /* gap1 size */
out_fdc(iot, ioh, type->datalen);/* data length */
}
fdc->sc_state = IOCOMPLETE;
disk_busy(&fd->sc_dk);
/* allow 2 seconds for operation */
callout_reset(&fdc->sc_timo_ch, 2 * hz, fdctimeout, fdc);
return 1; /* will return later */
case SEEKWAIT:
callout_stop(&fdc->sc_timo_ch);
fdc->sc_state = SEEKCOMPLETE;
/* allow 1/50 second for heads to settle */
callout_reset(&fdc->sc_intr_ch, hz / 50, fdcpseudointr, fdc);
return 1;
case SEEKCOMPLETE:
/* no data on seek */
disk_unbusy(&fd->sc_dk, 0, 0);
/* 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
fdcretry(fdc);
goto loop;
}
fd->sc_cylin = bp->b_cylinder;
goto doio;
case IOTIMEDOUT:
isa_dmaabort(fdc->sc_ic, fdc->sc_drq);
case SEEKTIMEDOUT:
case RECALTIMEDOUT:
case RESETTIMEDOUT:
fdcretry(fdc);
goto loop;
case IOCOMPLETE: /* IO DONE, post-analyze */
callout_stop(&fdc->sc_timo_ch);
disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid),
(bp->b_flags & B_READ));
if (fdcresult(fdc) != 7 || (st0 & 0xf8) != 0) {
isa_dmaabort(fdc->sc_ic, 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
fdcretry(fdc);
goto loop;
}
isa_dmadone(fdc->sc_ic, fdc->sc_drq);
if (fdc->sc_errors) {
diskerr(bp, "fd", "soft error (corrected)", LOG_PRINTF,
fd->sc_skip / FDC_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;
callout_reset(&fdc->sc_timo_ch, hz / 2, fdctimeout, fdc);
return 1; /* will return later */
case RESETCOMPLETE:
callout_stop(&fdc->sc_timo_ch);
/* clear the controller output buffer */
for (i = 0; i < 4; i++) {
out_fdc(iot, ioh, NE7CMD_SENSEI);
(void) fdcresult(fdc);
}
/* fall through */
case DORECAL:
out_fdc(iot, ioh, NE7CMD_RECAL); /* recalibrate function */
out_fdc(iot, ioh, fd->sc_drive);
fdc->sc_state = RECALWAIT;
callout_reset(&fdc->sc_timo_ch, 5 * hz, fdctimeout, fdc);
return 1; /* will return later */
case RECALWAIT:
callout_stop(&fdc->sc_timo_ch);
fdc->sc_state = RECALCOMPLETE;
/* allow 1/30 second for heads to settle */
callout_reset(&fdc->sc_intr_ch, hz / 30, fdcpseudointr, fdc);
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
fdcretry(fdc);
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("fdcintr: impossible");
#endif
#undef st0
#undef cyl
}
void
fdcretry(fdc)
struct fdc_softc *fdc;
{
char bits[64];
struct fd_softc *fd;
struct buf *bp;
fd = TAILQ_FIRST(&fdc->sc_drives);
bp = BUFQ_PEEK(&fd->sc_q);
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:
if ((fd->sc_opts & FDOPT_SILENT) == 0) {
diskerr(bp, "fd", "hard error", LOG_PRINTF,
fd->sc_skip / FDC_BSIZE,
(struct disklabel *)NULL);
printf(" (st0 %s",
bitmask_snprintf(fdc->sc_status[0],
NE7_ST0BITS, bits,
sizeof(bits)));
printf(" st1 %s",
bitmask_snprintf(fdc->sc_status[1],
NE7_ST1BITS, bits,
sizeof(bits)));
printf(" st2 %s",
bitmask_snprintf(fdc->sc_status[2],
NE7_ST2BITS, bits,
sizeof(bits)));
printf(" cyl %d head %d sec %d)\n",
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 = device_lookup(&fd_cd, FDUNIT(dev));
struct fdformat_parms *form_parms;
struct fdformat_cmd *form_cmd;
struct ne7_fd_formb *fd_formb;
struct disklabel buffer;
int error;
unsigned int scratch;
int il[FD_MAX_NSEC + 1];
register int i, j;
#ifdef __HAVE_OLD_DISKLABEL
struct disklabel newlabel;
#endif
switch (cmd) {
case DIOCGDINFO:
#ifdef __HAVE_OLD_DISKLABEL
case ODIOCGDINFO:
#endif
memset(&buffer, 0, sizeof(buffer));
buffer.d_secpercyl = fd->sc_type->seccyl;
buffer.d_type = DTYPE_FLOPPY;
buffer.d_secsize = FDC_BSIZE;
if (readdisklabel(dev, fdstrategy, &buffer, NULL) != NULL)
return EINVAL;
#ifdef __HAVE_OLD_DISKLABEL
if (cmd == ODIOCGDINFO) {
if (buffer.d_npartitions > OLDMAXPARTITIONS)
return ENOTTY;
memcpy(addr, &buffer, sizeof (struct olddisklabel));
} else
#endif
*(struct disklabel *)addr = buffer;
return 0;
case DIOCWLABEL:
if ((flag & FWRITE) == 0)
return EBADF;
/* XXX do something */
return 0;
case DIOCWDINFO:
#ifdef __HAVE_OLD_DISKLABEL
case ODIOCWDINFO:
#endif
{
struct disklabel *lp;
if ((flag & FWRITE) == 0)
return EBADF;
#ifdef __HAVE_OLD_DISKLABEL
if (cmd == ODIOCWDINFO) {
memset(&newlabel, 0, sizeof newlabel);
memcpy(&newlabel, addr, sizeof (struct olddisklabel));
lp = &newlabel;
} else
#endif
lp = (struct disklabel *)addr;
error = setdisklabel(&buffer, lp, 0, NULL);
if (error)
return error;
error = writedisklabel(dev, fdstrategy, &buffer, NULL);
return error;
}
case FDIOCGETFORMAT:
form_parms = (struct fdformat_parms *)addr;
form_parms->fdformat_version = FDFORMAT_VERSION;
form_parms->nbps = 128 * (1 << fd->sc_type->secsize);
form_parms->ncyl = fd->sc_type->cyls;
form_parms->nspt = fd->sc_type->sectrac;
form_parms->ntrk = fd->sc_type->heads;
form_parms->stepspercyl = fd->sc_type->step;
form_parms->gaplen = fd->sc_type->gap2;
form_parms->fillbyte = fd->sc_type->fillbyte;
form_parms->interleave = fd->sc_type->interleave;
switch (fd->sc_type->rate) {
case FDC_500KBPS:
form_parms->xfer_rate = 500 * 1024;
break;
case FDC_300KBPS:
form_parms->xfer_rate = 300 * 1024;
break;
case FDC_250KBPS:
form_parms->xfer_rate = 250 * 1024;
break;
default:
return EINVAL;
}
return 0;
case FDIOCSETFORMAT:
if((flag & FWRITE) == 0)
return EBADF; /* must be opened for writing */
form_parms = (struct fdformat_parms *)addr;
if (form_parms->fdformat_version != FDFORMAT_VERSION)
return EINVAL; /* wrong version of formatting prog */
scratch = form_parms->nbps >> 7;
if ((form_parms->nbps & 0x7f) || ffs(scratch) == 0 ||
scratch & ~(1 << (ffs(scratch)-1)))
/* not a power-of-two multiple of 128 */
return EINVAL;
switch (form_parms->xfer_rate) {
case 500 * 1024:
fd->sc_type->rate = FDC_500KBPS;
break;
case 300 * 1024:
fd->sc_type->rate = FDC_300KBPS;
break;
case 250 * 1024:
fd->sc_type->rate = FDC_250KBPS;
break;
default:
return EINVAL;
}
if (form_parms->nspt > FD_MAX_NSEC ||
form_parms->fillbyte > 0xff ||
form_parms->interleave > 0xff)
return EINVAL;
fd->sc_type->sectrac = form_parms->nspt;
if (form_parms->ntrk != 2 && form_parms->ntrk != 1)
return EINVAL;
fd->sc_type->heads = form_parms->ntrk;
fd->sc_type->seccyl = form_parms->nspt * form_parms->ntrk;
fd->sc_type->secsize = ffs(scratch)-1;
fd->sc_type->gap2 = form_parms->gaplen;
fd->sc_type->cyls = form_parms->ncyl;
fd->sc_type->size = fd->sc_type->seccyl * form_parms->ncyl *
form_parms->nbps / DEV_BSIZE;
fd->sc_type->step = form_parms->stepspercyl;
fd->sc_type->fillbyte = form_parms->fillbyte;
fd->sc_type->interleave = form_parms->interleave;
return 0;
case FDIOCFORMAT_TRACK:
if((flag & FWRITE) == 0)
return EBADF; /* must be opened for writing */
form_cmd = (struct fdformat_cmd *)addr;
if (form_cmd->formatcmd_version != FDFORMAT_VERSION)
return EINVAL; /* wrong version of formatting prog */
if (form_cmd->head >= fd->sc_type->heads ||
form_cmd->cylinder >= fd->sc_type->cyls) {
return EINVAL;
}
fd_formb = malloc(sizeof(struct ne7_fd_formb),
M_TEMP, M_NOWAIT);
if (fd_formb == 0)
return ENOMEM;
fd_formb->head = form_cmd->head;
fd_formb->cyl = form_cmd->cylinder;
fd_formb->transfer_rate = fd->sc_type->rate;
fd_formb->fd_formb_secshift = fd->sc_type->secsize;
fd_formb->fd_formb_nsecs = fd->sc_type->sectrac;
fd_formb->fd_formb_gaplen = fd->sc_type->gap2;
fd_formb->fd_formb_fillbyte = fd->sc_type->fillbyte;
memset(il, 0, sizeof il);
for (j = 0, i = 1; i <= fd_formb->fd_formb_nsecs; i++) {
while (il[(j%fd_formb->fd_formb_nsecs)+1])
j++;
il[(j%fd_formb->fd_formb_nsecs)+1] = i;
j += fd->sc_type->interleave;
}
for (i = 0; i < fd_formb->fd_formb_nsecs; i++) {
fd_formb->fd_formb_cylno(i) = form_cmd->cylinder;
fd_formb->fd_formb_headno(i) = form_cmd->head;
fd_formb->fd_formb_secno(i) = il[i+1];
fd_formb->fd_formb_secsize(i) = fd->sc_type->secsize;
}
error = fdformat(dev, fd_formb, p);
free(fd_formb, M_TEMP);
return error;
case FDIOCGETOPTS: /* get drive options */
*(int *)addr = fd->sc_opts;
return 0;
case FDIOCSETOPTS: /* 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 ne7_fd_formb *finfo;
struct proc *p;
{
int rv = 0, s;
struct fd_softc *fd = device_lookup(&fd_cd, FDUNIT(dev));
struct fd_type *type = fd->sc_type;
struct buf *bp;
/* set up a buffer header for fdstrategy() */
s = splbio();
bp = (struct buf *)pool_get(&bufpool, PR_NOWAIT);
splx(s);
if (bp == NULL)
return ENOBUFS;
memset((void *)bp, 0, sizeof(struct buf));
BUF_INIT(bp);
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) * FDC_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 %" PRIx64 " count %lx\n",
bp->b_blkno, bp->b_bcount);
#endif
/* now do the format */
fdstrategy(bp);
/* ...and wait for it to complete */
rv = biowait(bp);
s = splbio();
pool_put(&bufpool, bp);
splx(s);
return rv;
}
/*
* Mountroot hook: prompt the user to enter the root file system
* floppy.
*/
void
fd_mountroot_hook(dev)
struct device *dev;
{
int c;
printf("Insert filesystem floppy and press return.");
cnpollc(1);
for (;;) {
c = cngetc();
if ((c == '\r') || (c == '\n')) {
printf("\n");
break;
}
}
cnpollc(0);
}
Reference in New Issue View Git Blame Copy Permalink