Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
e6e777cf5d
NetBSD/sys/arch/sparc/dev/fd.c

1392 lines
32 KiB
C
Raw Blame History

/* $NetBSD: fd.c,v 1.2 1995/02/22 21:37:15 pk Exp $ */
/*-
* Copyright (c) 1993, 1994, 1995 Charles Hannum.
* Copyright (c) 1995 Paul Kranenburg.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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/conf.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/uio.h>
#include <sys/syslog.h>
#include <sys/queue.h>
#include <machine/cpu.h>
#include <machine/autoconf.h>
#include <sparc/sparc/auxreg.h>
#include <sparc/dev/fdreg.h>
#include <sparc/dev/fdvar.h>
#define FDUNIT(dev) (minor(dev) / 8)
#define FDTYPE(dev) (minor(dev) % 8)
#define b_cylin b_resid
#define FD_DEBUG
#ifdef FD_DEBUG
int fdc_debug = 0;
#endif
enum fdc_state {
DEVIDLE = 0,
MOTORWAIT,
DOSEEK,
SEEKWAIT,
SEEKTIMEDOUT,
SEEKCOMPLETE,
DOIO,
IOCOMPLETE,
IOTIMEDOUT,
DORESET,
RESETCOMPLETE,
RESETTIMEDOUT,
DORECAL,
RECALWAIT,
RECALTIMEDOUT,
RECALCOMPLETE,
};
/* software state, per controller */
struct fdc_softc {
struct dkdevice sc_dk; /* boilerplate */
struct intrhand sc_sih;
struct intrhand sc_hih;
caddr_t sc_reg;
struct fd_softc *sc_fd[4]; /* pointers to children */
TAILQ_HEAD(drivehead, fd_softc) sc_drives;
enum fdc_state sc_state;
int sc_flags;
#define FDC_82077 0x01
#define FDC_NEEDHEADSETTLE 0x02
#define FDC_EIS 0x04
int sc_errors; /* number of retries so far */
int sc_cfg; /* current configuration */
struct fdcio sc_io;
#define sc_reg_msr sc_io.fdcio_reg_msr
#define sc_reg_fifo sc_io.fdcio_reg_fifo
#define sc_reg_dor sc_io.fdcio_reg_dor
#define sc_reg_drs sc_io.fdcio_reg_msr
#define sc_istate sc_io.fdcio_istate
#define sc_data sc_io.fdcio_data
#define sc_tc sc_io.fdcio_tc
#define sc_nstat sc_io.fdcio_nstat
#define sc_status sc_io.fdcio_status
};
#ifndef FDC_C_HANDLER
extern struct fdcio *fdciop;
#endif
/* controller driver configuration */
int fdcmatch __P((struct device *, void *, void *));
void fdcattach __P((struct device *, struct device *, void *));
struct cfdriver fdccd = {
NULL, "fdc", fdcmatch, fdcattach, DV_DULL, sizeof(struct fdc_softc)
};
/*
* Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how
* we tell them apart.
*/
struct fd_type {
int sectrac; /* sectors per track */
int heads; /* number of heads */
int seccyl; /* sectors per cylinder */
int secsize; /* size code for sectors */
int datalen; /* data len when secsize = 0 */
int steprate; /* step rate and head unload time */
int gap1; /* gap len between sectors */
int gap2; /* formatting gap */
int tracks; /* total num of tracks */
int size; /* size of disk in sectors */
int step; /* steps per cylinder */
int rate; /* transfer speed code */
char *name;
};
/* 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 */
};
/* software state, per disk (with up to 4 disks per ctlr) */
struct fd_softc {
struct dkdevice sc_dk;
struct fd_type *sc_deftype; /* default type descriptor */
struct fd_type *sc_type; /* current type descriptor */
daddr_t sc_blkno; /* starting block number */
int sc_bcount; /* byte count left */
int sc_skip; /* bytes already transferred */
int sc_nblks; /* number of blocks currently tranferring */
int sc_nbytes; /* number of bytes currently tranferring */
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 */
TAILQ_ENTRY(fd_softc) sc_drivechain;
int sc_ops; /* I/O ops since last switch */
struct buf sc_q; /* head of buf chain */
};
/* floppy driver configuration */
int fdmatch __P((struct device *, void *, void *));
void fdattach __P((struct device *, struct device *, void *));
struct cfdriver fdcd = {
NULL, "fd", fdmatch, fdattach, DV_DISK, sizeof(struct fd_softc)
};
void fdgetdisklabel __P((struct fd_softc *));
int fd_get_parms __P((struct fd_softc *));
void fdstrategy __P((struct buf *));
void fdstart __P((struct fd_softc *));
struct dkdriver fddkdriver = { fdstrategy };
struct fd_type *fd_nvtotype __P((char *, int, int));
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));
int out_fdc __P((struct fdc_softc *fdc, u_char x));
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));
#ifdef FDC_C_HANDLER
int fdchwintr __P((struct fdc_softc *));
#else
void fdchwintr __P((void));
#endif
int fdcswintr __P((struct fdc_softc *));
void fdcretry __P((struct fdc_softc *fdc));
void fdfinish __P((struct fd_softc *fd, struct buf *bp));
#if PIL_FDSOFT == 4
#define IE_FDSOFT IE_L4
#else
#error 4
#endif
int
fdcmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct cfdata *cf = match;
register struct confargs *ca = aux;
register struct romaux *ra = &ca->ca_ra;
/* Sun PROMs call the controller an "fd" */
if (strcmp("fd", ra->ra_name))
return (0);
if (ca->ca_bustype == BUS_MAIN)
return (1);
return (0);
}
/*
* Arguments passed between fdcattach and fdprobe.
*/
struct fdc_attach_args {
int fa_drive;
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;
char *fdc;
{
register struct fdc_attach_args *fa = aux;
if (!fdc)
printf(" drive %d", fa->fa_drive);
return QUIET;
}
static void
fdconf(fdc)
struct fdc_softc *fdc;
{
int vroom;
if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10)
return;
/*
* dumpreg[7] seems to be a motor-off timeout; set it to whatever
* the PROM thinks is appropriate.
*/
if ((vroom = fdc->sc_status[7]) == 0)
vroom = 0x64;
/* Configure controller to use FIFO and Implied Seek */
out_fdc(fdc, NE7CMD_CFG);
out_fdc(fdc, vroom);
out_fdc(fdc, fdc->sc_cfg);
out_fdc(fdc, 0); /* PRETRK */
/* No result phase */
}
void
fdcattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
register struct confargs *ca = aux;
struct fdc_softc *fdc = (void *)self;
struct fdc_attach_args fa;
int n, pri;
if (ca->ca_ra.ra_vaddr)
fdc->sc_reg = (caddr_t)ca->ca_ra.ra_vaddr;
else
fdc->sc_reg = (caddr_t)mapiodev(ca->ca_ra.ra_paddr,
ca->ca_ra.ra_len,
ca->ca_bustype);
if (cputyp == CPU_SUN4M) {
fdc->sc_reg_msr = &((struct fdreg_sun4m *)fdc->sc_reg)->fd_msr;
fdc->sc_reg_fifo = &((struct fdreg_sun4m *)fdc->sc_reg)->fd_fifo;
fdc->sc_reg_dor = &((struct fdreg_sun4m *)fdc->sc_reg)->fd_dor;
} else {
fdc->sc_reg_msr = &((struct fdreg_sun4c *)fdc->sc_reg)->fd_msr;
fdc->sc_reg_fifo = &((struct fdreg_sun4c *)fdc->sc_reg)->fd_fifo;
}
fdc->sc_state = DEVIDLE;
fdc->sc_istate = ISTATE_IDLE;
fdc->sc_flags |= FDC_EIS;
TAILQ_INIT(&fdc->sc_drives);
pri = ca->ca_ra.ra_intr[0].int_pri;
#ifdef FDC_C_HANDLER
fdc->sc_hih.ih_fun = (void *)fdchwintr;
fdc->sc_hih.ih_arg = fdc;
intr_establish(pri, &fdc->sc_hih);
#else
fdciop = &fdc->sc_io;
intr_fasttrap(pri, fdchwintr);
#endif
fdc->sc_sih.ih_fun = (void *)fdcswintr;
fdc->sc_sih.ih_arg = fdc;
intr_establish(PIL_FDSOFT, &fdc->sc_sih);
if (out_fdc(fdc, NE7CMD_VERSION))
return;
n = fdcresult(fdc);
if (n == 1 && fdc->sc_status[0] == 0x90) {
fdc->sc_flags |= FDC_82077;
if (cputyp != CPU_SUN4M)
printf(" Hmmm.. ");
} else {
/* Not a 82077 */
if (cputyp != CPU_SUN4C)
printf(" Hmmm.. ");
}
/*
* Configure controller; enable FIFO, Implied seek, no POLL mode?.
* Note: CFG_EFIFO is active-low, initial threshold value: 0
*/
fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(0 & CFG_THRHLD_MASK);
fdconf(fdc);
if (fdc->sc_flags & FDC_82077) {
/* Lock configuration across soft resets. */
out_fdc(fdc, NE7CMD_LOCK | CFG_LOCK);
if (fdcresult(fdc) != 1)
printf(" CFGLOCK: unexpected response");
}
printf(" pri %d, softpri %d: chip %s\n", pri, PIL_FDSOFT,
(fdc->sc_flags & FDC_82077)?"82077":"82072");
/* physical limit: four drives per controller. */
for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) {
fa.fa_deftype = NULL; /* unknown */
fa.fa_deftype = &fd_types[0]; /* XXX */
(void)config_found(self, (void *)&fa, fdprint);
}
}
int
fdmatch(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;
int n;
if (fdc->sc_flags & FDC_82077) {
/* select drive and turn on motor */
*fdc->sc_reg_dor = drive | FDO_FRST | FDO_MOEN(drive);
/* wait for motor to spin up */
delay(250000);
} else {
if (drive > 0)
/* XXX - drive 0 always answers */
return 0;
auxregbisc(AUXIO_FDS, 0);
}
fdc->sc_nstat = 0;
out_fdc(fdc, NE7CMD_RECAL);
out_fdc(fdc, drive);
/* wait for recalibrate */
for (n = 0; n < 100000; n++) {
delay(10);
if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) {
/* wait a bit longer till device *really* is ready */
delay(100000);
if (out_fdc(fdc, NE7CMD_SENSEI))
break;
fdcresult(fdc);
if (n == 1 && fdc->sc_status[0] == 0x80)
/*
* Got `invalid command'; we interpret it
* to mean that the re-calibrate hasn't in
* fact finished yet
*/
continue;
break;
}
}
n = fdc->sc_nstat;
#ifdef FD_DEBUG
if (fdc_debug) {
int i;
printf("fdprobe: %d stati:", n);
for (i = 0; i < n; i++)
printf(" %x", fdc->sc_status[i]);
printf("\n");
}
#endif
if (n != 2 || (fdc->sc_status[0] & 0xf8) != 0x20)
return 0;
/* turn off motor */
if (fdc->sc_flags & FDC_82077) {
/* select drive and turn on motor */
*fdc->sc_reg_dor = FDO_FRST;
} else {
auxregbisc(0, AUXIO_FDS);
}
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;
/* XXX Allow `flags' to override device type? */
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_fd[drive] = fd;
fd->sc_dk.dk_driver = &fddkdriver;
#if 0
/* XXX Need to do some more fiddling with sc_dk. */
/* XXX sparc's dk_establish is bogus */
dk_establish(&fd->sc_dk, &fd->sc_dk.dk_dev);
#endif
}
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;
int unit = FDUNIT(bp->b_dev);
int sz;
int s;
/* Valid unit, controller, and request? */
if (unit >= fdcd.cd_ndevs ||
(fd = fdcd.cd_devs[unit]) == 0 ||
bp->b_blkno < 0 ||
(bp->b_bcount % FDC_BSIZE) != 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. */
bp->b_resid = bp->b_bcount;
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_cylin = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl;
#ifdef FD_DEBUG
if (fdc_debug > 1)
printf("fdstrategy: b_blkno %d b_bcount %d blkno %d cylin %d\n",
bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylin);
#endif
/* Queue transfer on drive, activate drive and controller if idle. */
s = splbio();
disksort(&fd->sc_q, bp);
untimeout(fd_motor_off, fd); /* a good idea */
if (!fd->sc_q.b_active)
fdstart(fd);
#ifdef DIAGNOSTIC
else {
struct fdc_softc *fdc = (void *)fd->sc_dk.dk_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. */
biodone(bp);
}
void
fdstart(fd)
struct fd_softc *fd;
{
struct fdc_softc *fdc = (void *)fd->sc_dk.dk_dev.dv_parent;
int active = fdc->sc_drives.tqh_first != 0;
/* Link into controller queue. */
fd->sc_q.b_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_dk.dk_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.
*/
if (fd->sc_drivechain.tqe_next && ++fd->sc_ops >= 8) {
fd->sc_ops = 0;
TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
if (bp->b_actf) {
TAILQ_INSERT_TAIL(&fdc->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(fd_motor_off, fd, 5 * hz);
fdc->sc_state = DEVIDLE;
}
void
fd_set_motor(fdc, reset)
struct fdc_softc *fdc;
int reset;
{
struct fd_softc *fd;
u_char status;
int n;
if (fdc->sc_flags & FDC_82077) {
if (fd = fdc->sc_drives.tqh_first)
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);
*fdc->sc_reg_dor = status;
} else {
int on = 0;
for (n = 0; n < 4; n++)
if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR))
on = 1;
if (on) {
auxregbisc(AUXIO_FDS, 0);
} else {
auxregbisc(0, AUXIO_FDS);
}
delay(10);
if (reset) {
*fdc->sc_reg_drs = DRS_RESET;
delay(10);
*fdc->sc_reg_drs = 0;
#ifdef FD_DEBUG
if (fdc_debug)
printf("fdc reset\n");
#endif
fdconf(fdc);
}
}
}
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_dk.dk_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_dk.dk_dev.dv_parent;
int s;
s = splbio();
fd->sc_flags &= ~FD_MOTOR_WAIT;
if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT))
(void) fdcswintr(fdc);
splx(s);
}
int
fdcresult(fdc)
struct fdc_softc *fdc;
{
u_char i;
int j = 100000,
n = 0;
for (; j; j--) {
i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB);
if (i == NE7_RQM)
return (fdc->sc_nstat = 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++] = *fdc->sc_reg_fifo;
}
}
log(LOG_ERR, "fdcresult: timeout\n");
return (fdc->sc_nstat = -1);
}
int
out_fdc(fdc, x)
struct fdc_softc *fdc;
u_char x;
{
int i = 100000;
while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0);
if (i <= 0)
return -1;
*fdc->sc_reg_fifo = x;
return 0;
}
int
Fdopen(dev, flags)
dev_t dev;
int flags;
{
int unit;
struct fd_softc *fd;
struct fd_type *type;
unit = FDUNIT(dev);
if (unit >= fdcd.cd_ndevs)
return ENXIO;
fd = fdcd.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)
dev_t dev;
int flags;
{
struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)];
fd->sc_flags &= ~FD_OPEN;
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) fdcswintr(fdc);
}
void
fdcstatus(dv, n, s)
struct device *dv;
int n;
char *s;
{
struct fdc_softc *fdc = (void *)dv->dv_parent;
#if 0
/*
* A 82072 seems to return <invalid command> on
* gratuitous Sense Interrupt commands.
*/
if (n == 0 && (fdc->sc_flags & FDC_82077)) {
out_fdc(fdc, NE7CMD_SENSEI);
(void) fdcresult(fdc);
n = 2;
}
#endif
/* Just print last status */
n = fdc->sc_nstat;
printf("%s: %s: state %d", dv->dv_xname, s, fdc->sc_state);
switch (n) {
case 0:
printf("\n");
break;
case 2:
printf(" (st0 %b cyl %d)\n",
fdc->sc_status[0], NE7_ST0BITS,
fdc->sc_status[1]);
break;
case 7:
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]);
break;
#ifdef DIAGNOSTIC
default:
printf(" fdcstatus: weird size: %d\n", n);
break;
#endif
}
}
void
fdctimeout(arg)
void *arg;
{
struct fdc_softc *fdc = arg;
struct fd_softc *fd = fdc->sc_drives.tqh_first;
int s;
s = splbio();
fdcstatus(&fd->sc_dk.dk_dev, 0, "timeout");
if (fd->sc_q.b_actf)
fdc->sc_state++;
else
fdc->sc_state = DEVIDLE;
(void) fdcswintr(fdc);
splx(s);
}
void
fdcpseudointr(arg)
void *arg;
{
struct fdc_softc *fdc = arg;
int s;
/* Just ensure it has the right spl. */
s = splbio();
(void) fdcswintr(fdc);
splx(s);
}
#ifdef FDC_C_HANDLER
/*
* hardware interrupt entry point: must be converted to `fast'
* (in-window) handler.
*/
int
fdchwintr(fdc)
struct fdc_softc *fdc;
{
struct buf *bp;
int read;
switch (fdc->sc_istate) {
case ISTATE_SENSEI:
out_fdc(fdc, NE7CMD_SENSEI);
fdcresult(fdc);
fdc->sc_istate = ISTATE_IDLE;
ienab_bis(IE_FDSOFT);
return 1;
case ISTATE_IDLE:
case ISTATE_SPURIOUS:
auxregbisc(0, AUXIO_FDS); /* Does this help? */
fdcresult(fdc);
fdc->sc_istate = ISTATE_SPURIOUS;
printf("fdc: stray hard interrupt... ");
ienab_bis(IE_FDSOFT);
return 1;
case ISTATE_DMA:
break;
default:
printf("fdc: goofed ...\n");
return 1;
}
read = bp->b_flags & B_READ;
for (;;) {
register int msr;
msr = *fdc->sc_reg_msr;
if ((msr & NE7_RQM) == 0)
break;
if ((msr & NE7_NDM) == 0) {
fdcresult(fdc);
fdc->sc_istate = ISTATE_IDLE;
ienab_bis(IE_FDSOFT);
printf("fdc: overrun: tc = %d\n", fdc->sc_tc);
break;
}
if (msr & NE7_DIO) {
#ifdef DIAGNOSTIC
if (!read)
printf("fdxfer: false read\n");
#endif
*fdc->sc_data++ = *fdc->sc_reg_fifo;
} else {
#ifdef DIAGNOSTIC
if (read)
printf("fdxfer: false write\n");
#endif
*fdc->sc_reg_fifo = *fdc->sc_data++;
}
if (--fdc->sc_tc == 0) {
auxregbisc(AUXIO_FTC, 0);
fdc->sc_istate = ISTATE_IDLE;
delay(10);
auxregbisc(0, AUXIO_FTC);
fdcresult(fdc);
ienab_bis(IE_FDSOFT);
break;
}
}
return 1;
}
#endif
int
fdcswintr(fdc)
struct fdc_softc *fdc;
{
#define st0 fdc->sc_status[0]
#define st1 fdc->sc_status[1]
#define cyl fdc->sc_status[1]
#define OUT_FDC(fdc, c, s) \
do { if (out_fdc(fdc, (c))) { (fdc)->sc_state = (s); goto loop; } } while(0)
struct fd_softc *fd;
struct buf *bp;
int read, head, trac, sec, i, s, nblks;
struct fd_type *type;
loop:
if (fdc->sc_istate != ISTATE_IDLE) {
/* Trouble... */
printf("fdc: spurious interrupt: istate=%d\n", fdc->sc_istate);
fdc->sc_istate = ISTATE_IDLE;
goto doreset;
}
/* Is there a drive for the controller to do a transfer with? */
fd = fdc->sc_drives.tqh_first;
if (fd == NULL) {
fdc->sc_state = DEVIDLE;
return 0;
}
/* Is there a transfer to this drive? If not, deactivate drive. */
bp = fd->sc_q.b_actf;
if (bp == NULL) {
fd->sc_ops = 0;
TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
fd->sc_q.b_active = 0;
goto loop;
}
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);
untimeout(fd_motor_off, fd);
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) {
untimeout(fd_motor_off, ofd);
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;
if (fdc->sc_flags & FDC_82077) { /* XXX */
/* Allow .25s for motor to stabilize. */
timeout(fd_motor_on, fd, hz / 4);
} else {
fd->sc_flags &= ~FD_MOTOR_WAIT;
goto loop;
}
return 1;
}
/* Make sure the right drive is selected. */
fd_set_motor(fdc, 0);
/* fall through */
case DOSEEK:
doseek:
if (fdc->sc_flags & FDC_EIS) {
fd->sc_cylin = bp->b_cylin;
/* We use implied seek */
goto doio;
}
if (fd->sc_cylin == bp->b_cylin)
goto doio;
/* specify command */
OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT);
OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT);
OUT_FDC(fdc, 6, SEEKTIMEDOUT); /* XXX head load time == 6ms */
fdc->sc_istate = ISTATE_SENSEI;
/* seek function */
OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT);
OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */
OUT_FDC(fdc, bp->b_cylin * fd->sc_type->step, SEEKTIMEDOUT);
fd->sc_cylin = -1;
fdc->sc_state = SEEKWAIT;
fdc->sc_nstat = 0;
timeout(fdctimeout, fdc, 4 * hz);
return 1;
case DOIO:
doio:
type = fd->sc_type;
sec = fd->sc_blkno % type->seccyl;
nblks = type->seccyl - sec;
nblks = min(nblks, fd->sc_bcount / FDC_BSIZE);
nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE);
fd->sc_nblks = nblks;
fd->sc_nbytes = 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 %d\n", block, fd->sc_blkno);
#ifdef DDB
Debugger();
#endif
}}
#endif
read = bp->b_flags & B_READ;
/* Setup for pseudo DMA */
fdc->sc_data = bp->b_data + fd->sc_skip;
fdc->sc_tc = fd->sc_nbytes;
*fdc->sc_reg_drs = type->rate;
#ifdef FD_DEBUG
if (fdc_debug > 1)
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
fdc->sc_state = IOCOMPLETE;
fdc->sc_istate = ISTATE_DMA;
fdc->sc_nstat = 0;
if (read)
OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT); /* READ */
else
OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT); /* WRITE */
OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT);
OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /* track */
OUT_FDC(fdc, head, IOTIMEDOUT);
OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /* sector +1 */
OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/* sector size */
OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/* sectors/track */
OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /* gap1 size */
OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/* data length */
/* allow 2 seconds for operation */
timeout(fdctimeout, fdc, 2 * hz);
return 1; /* will return later */
case SEEKWAIT:
untimeout(fdctimeout, fdc);
fdc->sc_state = SEEKCOMPLETE;
if (fdc->sc_flags & FDC_NEEDHEADSETTLE) {
/* allow 1/50 second for heads to settle */
timeout(fdcpseudointr, fdc, hz / 50);
return 1; /* will return later */
}
case SEEKCOMPLETE:
/* Make sure seek really happened. */
if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 ||
cyl != bp->b_cylin * fd->sc_type->step) {
#ifdef FD_DEBUG
if (fdc_debug)
fdcstatus(&fd->sc_dk.dk_dev, 2, "seek failed");
#endif
fdcretry(fdc);
goto loop;
}
fd->sc_cylin = bp->b_cylin;
goto doio;
case IOTIMEDOUT:
auxregbisc(AUXIO_FTC, 0);
delay(10);
auxregbisc(0, AUXIO_FTC);
(void)fdcresult(fdc);
case SEEKTIMEDOUT:
case RECALTIMEDOUT:
case RESETTIMEDOUT:
fdcretry(fdc);
goto loop;
case IOCOMPLETE: /* IO DONE, post-analyze */
untimeout(fdctimeout, fdc);
if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) {
#ifdef FD_DEBUG
if (fdc_debug) {
fdcstatus(&fd->sc_dk.dk_dev, 7,
bp->b_flags & B_READ
? "read failed" : "write failed");
printf("blkno %d nblks %d tc %d\n",
fd->sc_blkno, fd->sc_nblks, fdc->sc_tc);
}
#endif
if (st1 & ST1_OVERRUN) {
/* Try a higher threshold */
int thr = fdc->sc_cfg & CFG_THRHLD_MASK;
fdc->sc_cfg &= ~CFG_THRHLD_MASK;
if (thr < 15) thr++;
fdc->sc_cfg |= (thr & CFG_THRHLD_MASK);
#ifdef FD_DEBUG
if (fdc_debug)
printf("fdc: %d -> threshold\n", thr);
#endif
fdconf(fdc);
}
fdcretry(fdc);
goto loop;
}
if (fdc->sc_errors) {
diskerr(bp, "fd", "soft error", 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 (fd->sc_bcount > 0) {
bp->b_cylin = fd->sc_blkno / fd->sc_type->seccyl;
goto doseek;
}
fdfinish(fd, bp);
goto loop;
case DORESET:
doreset:
/* try a reset, keep motor on */
fd_set_motor(fdc, 1);
delay(100);
fd_set_motor(fdc, 0);
fdc->sc_state = RESETCOMPLETE;
timeout(fdctimeout, fdc, hz / 2);
return 1; /* will return later */
case RESETCOMPLETE:
untimeout(fdctimeout, fdc);
/* clear the controller output buffer */
for (i = 0; i < 4; i++) {
out_fdc(fdc, NE7CMD_SENSEI);
(void) fdcresult(fdc);
}
/* fall through */
case DORECAL:
fdc->sc_state = RECALWAIT;
fdc->sc_istate = ISTATE_SENSEI;
fdc->sc_nstat = 0;
/* recalibrate function */
OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT);
OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT);
timeout(fdctimeout, fdc, 5 * hz);
return 1; /* will return later */
case RECALWAIT:
untimeout(fdctimeout, fdc);
fdc->sc_state = RECALCOMPLETE;
if (fdc->sc_flags & FDC_NEEDHEADSETTLE) {
/* allow 1/30 second for heads to settle */
timeout(fdcpseudointr, fdc, hz / 30);
return 1; /* will return later */
}
case RECALCOMPLETE:
if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) {
#ifdef FD_DEBUG
if (fdc_debug)
fdcstatus(&fd->sc_dk.dk_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_dk.dk_dev, 0, "stray interrupt");
return 1;
}
#ifdef DIAGNOSTIC
panic("fdcintr: impossible");
#endif
#undef st0
#undef st1
#undef cyl
}
void
fdcretry(fdc)
struct fdc_softc *fdc;
{
struct fd_softc *fd;
struct buf *bp;
fd = fdc->sc_drives.tqh_first;
bp = fd->sc_q.b_actf;
switch (fdc->sc_errors) {
case 0:
/* try again */
fdc->sc_state =
(fdc->sc_flags & FDC_EIS) ? DOIO : SEEKCOMPLETE;
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:
diskerr(bp, "fd", "hard error", LOG_PRINTF,
fd->sc_skip / FDC_BSIZE, (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
fdsize(dev)
dev_t dev;
{
/* Swapping to floppies would not make sense. */
return -1;
}
int
fddump()
{
/* Not implemented. */
return EINVAL;
}
int
fdioctl(dev, cmd, addr, flag)
dev_t dev;
u_long cmd;
caddr_t addr;
int flag;
{
struct fd_softc *fd = fdcd.cd_devs[FDUNIT(dev)];
struct disklabel buffer;
int error;
switch (cmd) {
case DIOCGDINFO:
bzero(&buffer, 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;
*(struct disklabel *)addr = buffer;
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(&buffer, (struct disklabel *)addr, 0, NULL);
if (error)
return error;
error = writedisklabel(dev, fdstrategy, &buffer, NULL);
return error;
case FDIOCEJECT:
auxregbisc(AUXIO_FDS, AUXIO_FEJ);
delay(10);
auxregbisc(AUXIO_FEJ, AUXIO_FDS);
return 0;
#ifdef DEBUG
case _IO('f', 100):
{
int i;
struct fdc_softc *fdc = (struct fdc_softc *)
fd->sc_dk.dk_dev.dv_parent;
out_fdc(fdc, NE7CMD_DUMPREG);
fdcresult(fdc);
printf("dumpreg(%d regs): <", fdc->sc_nstat);
for (i = 0; i < fdc->sc_nstat; i++)
printf(" %x", fdc->sc_status[i]);
printf(">\n");
}
return 0;
case _IOW('f', 101, int):
((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent)->sc_cfg &=
~CFG_THRHLD_MASK;
((struct fdc_softc *)fd->sc_dk.dk_dev.dv_parent)->sc_cfg |=
(*(int *)addr & CFG_THRHLD_MASK);
fdconf(fd->sc_dk.dk_dev.dv_parent);
return 0;
case _IO('f', 102):
{
int i;
struct fdc_softc *fdc = (struct fdc_softc *)
fd->sc_dk.dk_dev.dv_parent;
out_fdc(fdc, NE7CMD_SENSEI);
fdcresult(fdc);
printf("sensei(%d regs): <", fdc->sc_nstat);
for (i=0; i< fdc->sc_nstat; i++)
printf(" 0x%x", fdc->sc_status[i]);
}
printf(">\n");
return 0;
#endif
default:
return ENOTTY;
}
#ifdef DIAGNOSTIC
panic("fdioctl: impossible");
#endif
}
Reference in New Issue View Git Blame Copy Permalink