Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
NetBSD/sys/arch/sun3/dev/fd.c

1992 lines
48 KiB
C
Raw Blame History

/* $NetBSD: fd.c,v 1.12 2000/01/21 23:39:55 thorpej Exp $ */
/*-
* Copyright (c) 1993, 1994, 1995 Charles M. 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 "opt_ddb.h"
#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/fdio.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/stat.h>
#include <sys/syslog.h>
#include <sys/queue.h>
#include <sys/conf.h>
#include <dev/cons.h>
#include <machine/cpu.h>
#include <machine/autoconf.h>
#include <sun3/dev/fdreg.h>
#include <sun3/dev/fdvar.h>
/*
* Print a complaint when no fd children were specified
* in the config file. Better than a link error...
*
* XXX: Some folks say this driver should be split in two,
* but that seems pointless with ONLY one type of child.
* (Thankfully, no 3/80 boxes have floppy tapes!:)
*/
#include "fdc.h"
#if NFD == 0
#error "fdc but no fd?"
#endif
#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
#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 device sc_dev; /* boilerplate */
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_overruns; /* number of DMA overruns */
int sc_cfg; /* current configuration */
int sc_fcr; /* current image of floppy ctrlr reg. */
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_fcr sc_io.fdcio_reg_fcr
#define sc_reg_fvr sc_io.fdcio_reg_fvr
#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
#define sc_intrcnt sc_io.fdcio_intrcnt
};
/* controller driver configuration */
int fdcmatch __P((struct device *, struct cfdata *, void *));
void fdcattach __P((struct device *, struct device *, void *));
struct cfattach fdc_ca = {
sizeof(struct fdc_softc), fdcmatch, fdcattach
};
extern struct cfdriver fdc_cd;
__inline struct fd_type *fd_dev_to_type __P((struct fd_softc *, dev_t));
/*
* 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 */
int fillbyte; /* format fill byte */
int interleave; /* interleave factor (formatting) */
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,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" 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 */
};
/* software state, per disk (with up to 4 disks per ctlr) */
struct fd_softc {
struct device sc_dv; /* generic device info */
struct disk sc_dk; /* generic disk info */
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 */
int sc_opts; /* user-set options */
void *sc_sdhook; /* shutdownhook cookie */
TAILQ_ENTRY(fd_softc) sc_drivechain;
int sc_ops; /* I/O ops since last switch */
struct buf_queue sc_q; /* pending I/O requests */
int sc_active; /* number of active I/O operations */
};
bdev_decl(fd);
cdev_decl(fd);
/* floppy driver configuration */
int fdmatch __P((struct device *, struct cfdata *, void *));
void fdattach __P((struct device *, struct device *, void *));
struct cfattach fd_ca = {
sizeof(struct fd_softc), fdmatch, fdattach
};
extern struct cfdriver fd_cd;
void fdgetdisklabel __P((dev_t));
int fd_get_parms __P((struct fd_softc *));
void fdstrategy __P((struct buf *));
void fdstart __P((struct fd_softc *));
int fdprint __P((void *, const char *));
struct dkdriver fddkdriver = { fdstrategy };
struct fd_type *fd_nvtotype __P((char *, int, int));
void fd_set_motor __P((struct fdc_softc *fdc));
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 fdc_reset __P((struct fdc_softc *fdc));
void fdctimeout __P((void *arg));
void fdcpseudointr __P((void *arg));
int fdchwintr __P((void *));
int fdcswintr __P((void *));
int fdcstate __P((struct fdc_softc *));
void fdcretry __P((struct fdc_softc *fdc));
void fdfinish __P((struct fd_softc *fd, struct buf *bp));
int fdformat __P((dev_t, struct ne7_fd_formb *, struct proc *));
void fd_do_eject __P((struct fdc_softc *, int));
void fd_mountroot_hook __P((struct device *));
static void fdconf __P((struct fdc_softc *));
static int fdc_softpend = 0;
#ifndef FDC_SOFTPRI
#define FDC_SOFTPRI 2
#endif
#define FD_SET_SWINTR() { fdc_softpend = 1; isr_soft_request(FDC_SOFTPRI); }
/*
* The Floppy Control Register on the sun3x, not to be confused with the
* Floppy ControllER Registers that this driver mostly insterfaces with,
* controls some of the auxillary functions of the floppy drive. These
* include asserting the floppy eject and terminal data count (or TC) pins
* of the floppy drive and controller chip respectively.
*
* Often it is necessary to toggle individual bits within this register
* while keeping the others untouched. However, the register does not
* present its latched data to the processor when read. This prevents the
* use of a read-modify-write cycle that would normally be used to modify
* individual bits. To get around this we must keep a copy of register's
* current value and always insure that when we wish to modify the register,
* we actually modify the copy and synchronize the register to it.
*/
#define FCR_REG_SYNC() (*fdc->sc_reg_fcr = fdc->sc_fcr)
int
fdcmatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct confargs *ca = aux;
if (bus_peek(ca->ca_bustype, ca->ca_paddr, sizeof(u_char)) == -1)
return (0);
return (1);
}
/*
* Arguments passed between fdcattach and fdprobe.
*/
struct fdc_attach_args {
int fa_drive;
struct bootpath *fa_bootpath;
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)
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 pri, vec;
char code;
fdc->sc_reg = (caddr_t)bus_mapin(ca->ca_bustype, ca->ca_paddr,
sizeof(union fdreg));
fdc->sc_state = DEVIDLE;
fdc->sc_istate = ISTATE_IDLE;
fdc->sc_flags |= FDC_EIS;
TAILQ_INIT(&fdc->sc_drives);
/* Assume a 82072 */
code = '2';
if (code == '7') {
panic("no 82077 fdc in this kernel");
/* NOTREACHED */
} else {
fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr;
fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo;
fdc->sc_reg_fcr = ((volatile u_int8_t *) fdc->sc_reg)
+ FDC_FCR_OFFSET;
fdc->sc_reg_fvr = ((volatile u_int8_t *) fdc->sc_reg)
+ FDC_FVR_OFFSET;
}
isr_add_autovect(fdcswintr, fdc, FDC_SOFTPRI);
pri = ca->ca_intpri;
vec = ca->ca_intvec;
if (vec == -1) {
/* Tell the FDC to fake an autovector. */
vec = 0x18 + pri; /* XXX */
isr_add_autovect(fdchwintr, fdc, pri);
} else {
/* An OBIO bus with vectors? Weird exception. */
isr_add_vectored(fdchwintr, fdc, pri, vec);
}
*fdc->sc_reg_fvr = vec; /* Program controller w/ interrupt vector */
printf(": (softpri %d) chip 8207%c\n", FDC_SOFTPRI, code);
#ifdef FD_DEBUG
if (out_fdc(fdc, NE7CMD_VERSION) == 0 &&
fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) {
if (fdc_debug)
printf("[version cmd]");
}
#endif
fdc_reset(fdc);
/*
* Configure controller; enable FIFO, Implied seek, no POLL mode?.
* Note: CFG_EFIFO is active-low, initial threshold value: 8
*/
fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK);
fdconf(fdc);
evcnt_attach(&fdc->sc_dev, "intr", &fdc->sc_intrcnt);
/* 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;
struct cfdata *match;
void *aux;
{
struct fdc_softc *fdc = (void *)parent;
struct fdc_attach_args *fa = aux;
int drive = fa->fa_drive;
int n, ok;
if (drive > 0)
/* XXX - for now, punt > 1 drives */
return (0);
/* select drive and turn on motor */
fdc->sc_fcr |= FCR_DSEL(drive) | FCR_MTRON;
FCR_REG_SYNC();
/* wait for motor to spin up */
delay(250000);
fdc->sc_nstat = 0;
out_fdc(fdc, NE7CMD_RECAL);
out_fdc(fdc, drive);
/* wait for recalibrate */
for (n = 0; n < 10000; n++) {
delay(1000);
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;
if (fdcresult(fdc) == 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
ok = (n == 2 && (fdc->sc_status[0] & 0xf8) == 0x20) ? 1 : 0;
/* turn off motor */
fdc->sc_fcr &= ~(FCR_DSEL(drive)|FCR_MTRON);
FCR_REG_SYNC();
return (ok);
}
/*
* 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");
BUFQ_FIRST(&fd->sc_q);
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_dv.dv_xname;
fd->sc_dk.dk_driver = &fddkdriver;
disk_attach(&fd->sc_dk);
#ifdef sparc
/*
* We're told if we're the boot device in fdcattach().
*/
if (fa->fa_bootpath)
fa->fa_bootpath->dev = &fd->sc_dv;
#endif
#define OUT_FDC(sc, c) { \
if (out_fdc((sc), (c))) \
printf("fdc: specify command failed.\n");\
}
/* specify command */
OUT_FDC(fdc, NE7CMD_SPECIFY);
OUT_FDC(fdc, type->steprate);
/*
* The '|1' in the following statement turns on the 'Non-DMA' bit
* specifier in the last byte of the SPECIFY command as described in the
* datasheet I have. This is necessary for the driver to work on the
* sun3x, because the system will not respond to the chip's requests
* for DMA; there is no hardware on the motherboard to support it.
* By enabling this bit, we will force the chip to interrupt when its
* FIFO is full, at which point the interrupt handler will empty it and
* continue. This is ``pseudo-DMA''.
* -J
*/
OUT_FDC(fdc, 6|1); /* XXX head load time == 6ms */
#undef OUT_FDC
/*
* Establish a mountroot_hook anyway in case we booted
* with RB_ASKNAME and get selected as the boot device.
*/
mountroothook_establish(fd_mountroot_hook, &fd->sc_dv);
/* Make sure the drive motor gets turned off at shutdown time. */
fd->sc_sdhook = shutdownhook_establish(fd_motor_off, fd);
/* XXX Need to do some more fiddling with sc_dk. */
dk_establish(&fd->sc_dk, &fd->sc_dv);
}
__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 >= fd_cd.cd_ndevs ||
(fd = fd_cd.cd_devs[unit]) == 0 ||
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. */
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_cylinder = 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 %ld blkno %d cylin %ld\n",
bp->b_blkno, bp->b_bcount, fd->sc_blkno, bp->b_cylinder);
#endif
/* Queue transfer on drive, activate drive and controller if idle. */
s = splbio();
disksort_cylinder(&fd->sc_q, bp);
untimeout(fd_motor_off, fd); /* a good idea */
if (fd->sc_active == 0)
fdstart(fd);
#ifdef DIAGNOSTIC
else {
struct fdc_softc *fdc = (void *)fd->sc_dv.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_dv.dv_parent;
int active = fdc->sc_drives.tqh_first != 0;
/* 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_dv.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 (BUFQ_NEXT(bp) != 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;
BUFQ_REMOVE(&fd->sc_q);
biodone(bp);
/* turn off motor 5s from now */
timeout(fd_motor_off, fd, 5 * hz);
fdc->sc_state = DEVIDLE;
}
void
fdc_reset(fdc)
struct fdc_softc *fdc;
{
fdc->sc_fcr = 0;
FCR_REG_SYNC();
*fdc->sc_reg_drs = DRS_RESET;
delay(10);
*fdc->sc_reg_drs = 0;
#ifdef FD_DEBUG
if (fdc_debug)
printf("fdc reset\n");
#endif
}
void
fd_set_motor(fdc)
struct fdc_softc *fdc;
{
struct fd_softc *fd;
int n;
int on = 0;
for (n = 0; n < 4; n++)
if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR))
on = 1;
if (on) {
fdc->sc_fcr |= FCR_DSEL(0)|FCR_MTRON; /* XXX */
} else {
fdc->sc_fcr &= ~(FCR_DSEL(0)|FCR_MTRON); /* XXX */
}
FCR_REG_SYNC();
}
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_dv.dv_parent);
splx(s);
}
void
fd_motor_on(arg)
void *arg;
{
struct fd_softc *fd = arg;
struct fdc_softc *fdc = (void *)fd->sc_dv.dv_parent;
int s;
s = splbio();
fd->sc_flags &= ~FD_MOTOR_WAIT;
if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT))
(void) fdcstate(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;
} else
delay(10);
}
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)
delay(1);
if (i <= 0)
return (-1);
*fdc->sc_reg_fifo = x;
return (0);
}
int
fdopen(dev, flags, fmt, p)
dev_t dev;
int flags, fmt;
struct proc *p;
{
int unit, pmask;
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;
/*
* Only update the disklabel if we're not open anywhere else.
*/
if (fd->sc_dk.dk_openmask == 0)
fdgetdisklabel(dev);
pmask = (1 << DISKPART(dev));
switch (fmt) {
case S_IFCHR:
fd->sc_dk.dk_copenmask |= pmask;
break;
case S_IFBLK:
fd->sc_dk.dk_bopenmask |= pmask;
break;
}
fd->sc_dk.dk_openmask =
fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask;
return (0);
}
int
fdclose(dev, flags, fmt, p)
dev_t dev;
int flags, fmt;
struct proc *p;
{
struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)];
int pmask = (1 << DISKPART(dev));
fd->sc_flags &= ~FD_OPEN;
fd->sc_opts &= ~(FDOPT_NORETRY|FDOPT_SILENT);
switch (fmt) {
case S_IFCHR:
fd->sc_dk.dk_copenmask &= ~pmask;
break;
case S_IFBLK:
fd->sc_dk.dk_bopenmask &= ~pmask;
break;
}
fd->sc_dk.dk_openmask =
fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask;
return (0);
}
int
fdread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio));
}
int
fdwrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
return (physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio));
}
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) fdcstate(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 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 %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(" 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_dv, 0, "timeout");
if (BUFQ_FIRST(&fd->sc_q) != NULL)
fdc->sc_state++;
else
fdc->sc_state = DEVIDLE;
(void) fdcstate(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) fdcstate(fdc);
splx(s);
}
/*
* hardware interrupt entry point: must be converted to `fast'
* (in-window) handler.
*/
int
fdchwintr(arg)
void *arg;
{
struct fdc_softc *fdc = arg;
/*
* This code was reverse engineered from the SPARC bsd_fdintr.s.
*/
switch (fdc->sc_istate) {
case ISTATE_IDLE:
return (0);
case ISTATE_SENSEI:
out_fdc(fdc, NE7CMD_SENSEI);
fdcresult(fdc);
fdc->sc_istate = ISTATE_DONE;
FD_SET_SWINTR();
return (1);
case ISTATE_DMA:
break;
default:
log(LOG_ERR, "fdc: stray hard interrupt.\n");
fdc->sc_fcr &= ~(FCR_DSEL(0)); /* Does this help? */
fdc->sc_istate = ISTATE_SPURIOUS;
FD_SET_SWINTR();
return (1);
}
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_DONE;
FD_SET_SWINTR();
log(LOG_ERR, "fdc: overrun: tc = %d\n", fdc->sc_tc);
break;
}
if (msr & NE7_DIO) {
*fdc->sc_data++ = *fdc->sc_reg_fifo;
} else {
*fdc->sc_reg_fifo = *fdc->sc_data++;
}
if (--fdc->sc_tc == 0) {
fdc->sc_fcr |= FCR_TC;
FCR_REG_SYNC();
fdc->sc_istate = ISTATE_DONE;
delay(10);
fdc->sc_fcr &= ~FCR_TC;
FCR_REG_SYNC();
fdcresult(fdc);
FD_SET_SWINTR();
break;
}
}
return (1);
}
int
fdcswintr(arg)
void *arg;
{
struct fdc_softc *fdc = arg;
int s;
if (fdc_softpend == 0)
return (0);
isr_soft_clear(FDC_SOFTPRI);
fdc_softpend = 0;
if (fdc->sc_istate != ISTATE_DONE)
return (0);
fdc->sc_istate = ISTATE_IDLE;
s = splbio();
fdcstate(fdc);
splx(s);
return (1);
}
int
fdcstate(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, sec, nblks;
struct fd_type *type;
struct ne7_fd_formb *finfo = NULL;
if (fdc->sc_istate != ISTATE_IDLE) {
/* Trouble... */
printf("fdc: spurious interrupt: state %d, istate=%d\n",
fdc->sc_state, fdc->sc_istate);
fdc->sc_istate = ISTATE_IDLE;
if (fdc->sc_state == RESETCOMPLETE ||
fdc->sc_state == RESETTIMEDOUT) {
panic("fdcintr: spurious interrupt can't be cleared");
}
goto doreset;
}
loop:
/* 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 = BUFQ_FIRST(&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);
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);
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);
/*FALLTHROUGH*/
case DOSEEK:
doseek:
if ((fdc->sc_flags & FDC_EIS) &&
(bp->b_flags & B_FORMAT) == 0) {
fd->sc_cylin = bp->b_cylinder;
/* We use implied seek */
goto doio;
}
if (fd->sc_cylin == bp->b_cylinder)
goto doio;
/* specify command */
OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT);
OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT);
OUT_FDC(fdc, 6|1, 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_cylinder * fd->sc_type->step, SEEKTIMEDOUT);
fd->sc_cylin = -1;
fdc->sc_state = SEEKWAIT;
fdc->sc_nstat = 0;
fd->sc_dk.dk_seek++;
disk_busy(&fd->sc_dk);
timeout(fdctimeout, fdc, 4 * hz);
return (1);
case DOIO:
doio:
#ifdef NOTYET
/* Check to see if the disk has changed */
if (fdc->sc_reg_dir & FDI_DCHG) {
/*
* The disk in the drive has changed since
* the last transfer. We need to see if its geometry
* has changed.
*/
}
#endif /* NOTYET */
if (finfo)
fd->sc_skip = (char *)&(finfo->fd_formb_cylno(0)) -
(char *)finfo;
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 = 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 %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 (finfo) {
/* formatting */
OUT_FDC(fdc, NE7CMD_FORMAT, IOTIMEDOUT);
OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT);
OUT_FDC(fdc, finfo->fd_formb_secshift, IOTIMEDOUT);
OUT_FDC(fdc, finfo->fd_formb_nsecs, IOTIMEDOUT);
OUT_FDC(fdc, finfo->fd_formb_gaplen, IOTIMEDOUT);
OUT_FDC(fdc, finfo->fd_formb_fillbyte, IOTIMEDOUT);
} else {
if (read)
OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT);
else
OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT);
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);/*secs/track*/
OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /*gap1 size*/
OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/*data length*/
}
disk_busy(&fd->sc_dk);
/* 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 */
}
/*FALLTHROUGH*/
case SEEKCOMPLETE:
disk_unbusy(&fd->sc_dk, 0); /* no data on seek */
/* Make sure seek really happened. */
if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 ||
cyl != bp->b_cylinder * fd->sc_type->step) {
#ifdef FD_DEBUG
if (fdc_debug)
fdcstatus(&fd->sc_dv, 2, "seek failed");
#endif
fdcretry(fdc);
goto loop;
}
fd->sc_cylin = bp->b_cylinder;
goto doio;
case IOTIMEDOUT:
fdc->sc_fcr |= FCR_TC;
FCR_REG_SYNC();
delay(10);
fdc->sc_fcr &= ~FCR_TC;
FCR_REG_SYNC();
(void)fdcresult(fdc);
/*FALLTHROUGH*/
case SEEKTIMEDOUT:
case RECALTIMEDOUT:
case RESETTIMEDOUT:
fdcretry(fdc);
goto loop;
case IOCOMPLETE: /* IO DONE, post-analyze */
untimeout(fdctimeout, fdc);
disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid));
if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) {
#ifdef FD_DEBUG
if (fdc_debug) {
fdcstatus(&fd->sc_dv, 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 (fdc->sc_nstat == 7 &&
(st1 & ST1_OVERRUN) == ST1_OVERRUN) {
/*
* Silently retry overruns if no other
* error bit is set. Adjust threshold.
*/
int thr = fdc->sc_cfg & CFG_THRHLD_MASK;
if (thr < 15) {
thr++;
fdc->sc_cfg &= ~CFG_THRHLD_MASK;
fdc->sc_cfg |= (thr & CFG_THRHLD_MASK);
#ifdef FD_DEBUG
if (fdc_debug)
printf("fdc: %d -> threshold\n", thr);
#endif
fdconf(fdc);
fdc->sc_overruns = 0;
}
if (++fdc->sc_overruns < 3) {
fdc->sc_state = DOIO;
goto loop;
}
}
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;
} else {
if (--fdc->sc_overruns < -20) {
int thr = fdc->sc_cfg & CFG_THRHLD_MASK;
if (thr > 0) {
thr--;
fdc->sc_cfg &= ~CFG_THRHLD_MASK;
fdc->sc_cfg |= (thr & CFG_THRHLD_MASK);
#ifdef FD_DEBUG
if (fdc_debug)
printf("fdc: %d -> threshold\n", thr);
#endif
fdconf(fdc);
}
fdc->sc_overruns = 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:
doreset:
/* try a reset, keep motor on */
fd_set_motor(fdc);
delay(100);
fdc_reset(fdc);
fdc->sc_nstat = 0;
fdc->sc_istate = ISTATE_SENSEI;
fdc->sc_state = RESETCOMPLETE;
timeout(fdctimeout, fdc, hz / 2);
return (1); /* will return later */
case RESETCOMPLETE:
untimeout(fdctimeout, fdc);
fdconf(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_dv, 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_dv, 0, "stray interrupt");
return (1);
}
#ifdef DIAGNOSTIC
panic("fdcintr: impossible");
#endif
#undef st0
#undef st1
#undef cyl
}
void
fdcretry(fdc)
struct fdc_softc *fdc;
{
char bits[64];
struct fd_softc *fd;
struct buf *bp;
fd = fdc->sc_drives.tqh_first;
bp = BUFQ_FIRST(&fd->sc_q);
fdc->sc_overruns = 0;
if (fd->sc_opts & FDOPT_NORETRY)
goto fail;
switch (fdc->sc_errors) {
case 0:
/* try again */
fdc->sc_state =
(fdc->sc_flags & FDC_EIS) ? DOIO : 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
fdsize(dev)
dev_t dev;
{
/* Swapping to floppies would not make sense. */
return (-1);
}
int
fddump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
/* Not implemented. */
return (EINVAL);
}
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 fdformat_parms *form_parms;
struct fdformat_cmd *form_cmd;
struct ne7_fd_formb fd_formb;
int il[FD_MAX_NSEC + 1];
int i, j;
int error;
switch (cmd) {
case DIOCGDINFO:
*(struct disklabel *)addr = *(fd->sc_dk.dk_label);
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(fd->sc_dk.dk_label,
(struct disklabel *)addr, 0,
fd->sc_dk.dk_cpulabel);
if (error)
return (error);
error = writedisklabel(dev, fdstrategy,
fd->sc_dk.dk_label,
fd->sc_dk.dk_cpulabel);
return (error);
case DIOCLOCK:
/*
* Nothing to do here, really.
*/
return (0);
case DIOCEJECT:
if (*(int *)addr == 0) {
int part = DISKPART(dev);
/*
* Don't force eject: check that we are the only
* partition open. If so, unlock it.
*/
if ((fd->sc_dk.dk_openmask & ~(1 << part)) != 0 ||
fd->sc_dk.dk_bopenmask + fd->sc_dk.dk_copenmask !=
fd->sc_dk.dk_openmask) {
return (EBUSY);
}
}
/* FALLTHROUGH */
case ODIOCEJECT:
fd_do_eject((void *)fd->sc_dv.dv_parent, fd->sc_drive);
return (0);
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->tracks;
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 */
i = form_parms->nbps >> 7;
if ((form_parms->nbps & 0x7f) || ffs(i) == 0 ||
i & ~(1 << (ffs(i)-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(i)-1;
fd->sc_type->gap2 = form_parms->gaplen;
fd->sc_type->tracks = 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)
/* must be opened for writing */
return (EBADF);
form_cmd = (struct fdformat_cmd *)addr;
if (form_cmd->formatcmd_version != FDFORMAT_VERSION)
/* wrong version of formatting prog */
return (EINVAL);
if (form_cmd->head >= fd->sc_type->heads ||
form_cmd->cylinder >= fd->sc_type->tracks) {
return (EINVAL);
}
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;
bzero(il, 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;
}
return fdformat(dev, &fd_formb, p);
case FDIOCGETOPTS: /* get drive options */
*(int *)addr = fd->sc_opts;
return (0);
case FDIOCSETOPTS: /* set drive options */
fd->sc_opts = *(int *)addr;
return (0);
#ifdef DEBUG
case _IO('f', 100):
{
int i;
struct fdc_softc *fdc = (struct fdc_softc *)
fd->sc_dv.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_dv.dv_parent)->sc_cfg &=
~CFG_THRHLD_MASK;
((struct fdc_softc *)fd->sc_dv.dv_parent)->sc_cfg |=
(*(int *)addr & CFG_THRHLD_MASK);
fdconf((struct fdc_softc *) fd->sc_dv.dv_parent);
return (0);
case _IO('f', 102):
{
int i;
struct fdc_softc *fdc = (struct fdc_softc *)
fd->sc_dv.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
}
int
fdformat(dev, finfo, p)
dev_t dev;
struct ne7_fd_formb *finfo;
struct proc *p;
{
int rv = 0, s;
struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)];
struct fd_type *type = fd->sc_type;
struct buf *bp;
/* set up a buffer header for fdstrategy() */
bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
if (bp == 0)
return (ENOBUFS);
PHOLD(p);
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) * FDC_BSIZE / DEV_BSIZE;
bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
bp->b_data = (caddr_t)finfo;
#ifdef FD_DEBUG
if (fdc_debug)
printf("fdformat: blkno %x count %ld\n",
bp->b_blkno, bp->b_bcount);
#endif
/* now do the format */
fdstrategy(bp);
/* ...and wait for it to complete */
s = splbio();
while (!(bp->b_flags & B_DONE)) {
rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz);
if (rv == EWOULDBLOCK)
break;
}
splx(s);
if (rv == EWOULDBLOCK) {
/* timed out */
rv = EIO;
biodone(bp);
}
if (bp->b_flags & B_ERROR) {
rv = bp->b_error;
}
PRELE(p);
free(bp, M_TEMP);
return (rv);
}
void
fdgetdisklabel(dev)
dev_t dev;
{
int unit = FDUNIT(dev), i;
struct fd_softc *fd = fd_cd.cd_devs[unit];
struct disklabel *lp = fd->sc_dk.dk_label;
struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel;
bzero(lp, sizeof(struct disklabel));
bzero(lp, sizeof(struct cpu_disklabel));
lp->d_type = DTYPE_FLOPPY;
lp->d_secsize = FDC_BSIZE;
lp->d_secpercyl = fd->sc_type->seccyl;
lp->d_nsectors = fd->sc_type->sectrac;
lp->d_ncylinders = fd->sc_type->tracks;
lp->d_ntracks = fd->sc_type->heads; /* Go figure... */
lp->d_rpm = 3600; /* XXX like it matters... */
strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename));
strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
lp->d_interleave = 1;
lp->d_partitions[RAW_PART].p_offset = 0;
lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders;
lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED;
lp->d_npartitions = RAW_PART + 1;
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = dkcksum(lp);
/*
* Call the generic disklabel extraction routine. If there's
* not a label there, fake it.
*/
if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) {
strncpy(lp->d_packname, "default label",
sizeof(lp->d_packname));
/*
* Reset the partition info; it might have gotten
* trashed in readdisklabel().
*
* XXX Why do we have to do this? readdisklabel()
* should be safe...
*/
for (i = 0; i < MAXPARTITIONS; ++i) {
lp->d_partitions[i].p_offset = 0;
if (i == RAW_PART) {
lp->d_partitions[i].p_size =
lp->d_secpercyl * lp->d_ncylinders;
lp->d_partitions[i].p_fstype = FS_BSDFFS;
} else {
lp->d_partitions[i].p_size = 0;
lp->d_partitions[i].p_fstype = FS_UNUSED;
}
}
lp->d_npartitions = RAW_PART + 1;
}
}
void
fd_do_eject(fdc, unit)
struct fdc_softc *fdc;
int unit;
{
fdc->sc_fcr |= FCR_DSEL(unit)|FCR_EJECT;
FCR_REG_SYNC();
delay(10);
fdc->sc_fcr &= ~(FCR_DSEL(unit)|FCR_EJECT);
FCR_REG_SYNC();
}
#ifdef MEMORY_DISK_HOOKS_sun3x_not_yet
int fd_read_md_image __P((size_t *, caddr_t *));
#endif
/* ARGSUSED */
void
fd_mountroot_hook(dev)
struct device *dev;
{
int c;
fd_do_eject(fdc_cd.cd_devs[0], 0); /* XXX - doesn't check ``dev'' */
printf("Insert filesystem floppy and press return.");
for (;;) {
c = cngetc();
if ((c == '\r') || (c == '\n')) {
printf("\n");
break;
}
}
#ifdef MEMORY_DISK_HOOKS_sun3x_not_yet
{
extern int (*md_read_image) __P((size_t *, caddr_t *));
md_read_image = fd_read_md_image;
}
#endif
}
#ifdef MEMORY_DISK_HOOKS_sun3x_not_yet
#define FDMICROROOTSIZE ((2*18*80) << DEV_BSHIFT)
int
fd_read_md_image(sizep, addrp)
size_t *sizep;
caddr_t *addrp;
{
struct buf buf, *bp = &buf;
dev_t dev;
off_t offset;
caddr_t addr;
dev = makedev(54,0); /* XXX */
MALLOC(addr, caddr_t, FDMICROROOTSIZE, M_DEVBUF, M_WAITOK);
*addrp = addr;
if (fdopen(dev, 0, S_IFCHR, NULL))
panic("fd: mountroot: fdopen");
offset = 0;
for (;;) {
bp->b_dev = dev;
bp->b_error = 0;
bp->b_resid = 0;
bp->b_proc = NULL;
bp->b_flags = B_BUSY | B_PHYS | B_RAW | B_READ;
bp->b_blkno = btodb(offset);
bp->b_bcount = DEV_BSIZE;
bp->b_data = addr;
fdstrategy(bp);
while ((bp->b_flags & B_DONE) == 0) {
tsleep((caddr_t)bp, PRIBIO + 1, "physio", 0);
}
if (bp->b_error)
panic("fd: mountroot: fdread error %d", bp->b_error);
if (bp->b_resid != 0)
break;
addr += DEV_BSIZE;
offset += DEV_BSIZE;
if (offset + DEV_BSIZE > FDMICROROOTSIZE)
break;
}
(void)fdclose(dev, 0, S_IFCHR, NULL);
*sizep = offset;
fd_do_eject(fdc_cd.cd_devs[0], FDUNIT(dev)); /* XXX */
return (0);
}
#endif
Reference in New Issue View Git Blame Copy Permalink