Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
NetBSD/sys/arch/x68k/dev/fd.c

1560 lines
36 KiB
C
Raw Blame History

/* $NetBSD: fd.c,v 1.9 1997/01/31 02:15:54 thorpej Exp $ */
/*-
* Copyright (c) 1993, 1994, 1995 Charles Hannum.
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Don Ahn.
*
* 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/stat.h>
#include <sys/ioctl.h>
#include <sys/malloc.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 <x68k/x68k/iodevice.h>
#include <x68k/dev/dmavar.h>
#include <x68k/dev/fdreg.h>
#include <x68k/dev/opmreg.h>
#define infdc (IODEVbase->io_fdc)
#ifdef DEBUG
#define DPRINTF(x) if (fddebug) printf x
int fddebug = 0;
#else
#define DPRINTF(x)
#endif
#define FDUNIT(dev) (minor(dev) / 8)
#define FDTYPE(dev) (minor(dev) % 8)
#define b_cylin b_resid
enum fdc_state {
DEVIDLE = 0,
MOTORWAIT,
DOSEEK,
SEEKWAIT,
SEEKTIMEDOUT,
SEEKCOMPLETE,
DOIO,
IOCOMPLETE,
IOTIMEDOUT,
DORESET,
RESETCOMPLETE,
RESETTIMEDOUT,
DORECAL,
RECALWAIT,
RECALTIMEDOUT,
RECALCOMPLETE,
DOCOPY,
DOIOHALF,
COPYCOMPLETE,
};
/* software state, per controller */
struct fdc_softc {
struct device sc_dev; /* boilerplate */
u_char sc_flags;
struct fd_softc *sc_fd[4]; /* pointers to children */
TAILQ_HEAD(drivehead, fd_softc) sc_drives;
enum fdc_state sc_state;
int sc_errors; /* number of retries so far */
u_char sc_status[7]; /* copy of registers */
} fdc_softc;
/* controller driver configuration */
int fdcinit();
void fdcstart();
void fdcgo();
int fdcintr ();
void fdcdone();
void fdcreset();
/* controller driver configuration */
int fdcprobe __P((struct device *, void *, void *));
void fdcattach __P((struct device *, struct device *, void *));
struct cfattach fdc_ca = {
sizeof(struct fdc_softc), fdcprobe, fdcattach
};
struct cfdriver fdc_cd = {
NULL, "fdc", DV_DULL
};
/*
* 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[] = {
{ 8,2,16,3,0xff,0xdf,0x35,0x74,77,1232,1,FDC_500KBPS, "1.2MB/[1024bytes/sector]" }, /* 1.2 MB japanese format */
{ 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 device sc_dev;
struct disk 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_BOPEN 0x01 /* it's open */
#define FD_COPEN 0x02 /* it's open */
#define FD_OPEN (FD_BOPEN|FD_COPEN) /* it's open */
#define FD_MOTOR 0x04 /* motor should be on */
#define FD_MOTOR_WAIT 0x08 /* motor coming up */
#define FD_ALIVE 0x10 /* alive */
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 */
u_char *sc_copybuf; /* for secsize >=3 */
u_char sc_part; /* for secsize >=3 */
#define SEC_P10 0x02 /* first part */
#define SEC_P01 0x01 /* second part */
#define SEC_P11 0x03 /* both part */
};
/* floppy driver configuration */
int fdprobe __P((struct device *, void *, void *));
void fdattach __P((struct device *, struct device *, void *));
struct cfattach fd_ca = {
sizeof(struct fd_softc), fdprobe, fdattach
};
struct cfdriver fd_cd = {
NULL, "fd", DV_DISK
};
/* floppy driver configuration */
void fdstart __P((struct fd_softc *fd));
void fdgo();
void fdintr();
void fdstrategy __P((struct buf *));
struct dkdriver fddkdriver = { fdstrategy };
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((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));
void fdcretry __P((struct fdc_softc *fdc));
void fdfinish __P((struct fd_softc *fd, struct buf *bp));
static int fdgetdisklabel __P((struct fd_softc *, dev_t));
static void fd_do_eject __P((int));
void fd_mountroot_hook __P((struct device *));
#define FDDI_EN 0x02
#define FDCI_EN 0x04
#define FDD_INT 0x40
#define FDC_INT 0x80
#define DMA_BRD 0x01
#define DMA_BWR 0x02
#define DRQ 0
static u_char *fdc_dmabuf;
static inline void
fdc_dmastart(read, addr, count)
int read;
caddr_t addr;
int count;
{
volatile struct dmac *dmac = &IODEVbase->io_dma[DRQ];
DPRINTF(("fdc_dmastart: (%s, addr = %p, count = %d\n",
read ? "read" : "write", addr, count));
if (dmarangecheck((vm_offset_t)addr, count)) {
dma_bouncebytes[DRQ] = count;
dma_dataaddr[DRQ] = addr;
if (!(read)) {
bcopy(addr, dma_bouncebuf[DRQ], count);
dma_bounced[DRQ] = DMA_BWR;
} else {
dma_bounced[DRQ] = DMA_BRD;
}
addr = dma_bouncebuf[DRQ];
} else {
dma_bounced[DRQ] = 0;
}
dmac->csr = 0xff;
dmac->ocr = read ? 0xb2 : 0x32;
dmac->mtc = (unsigned short)count;
asm("nop");
asm("nop");
dmac->mar = (unsigned long)kvtop(addr);
#if defined(M68040)
/*
* Push back dirty cache lines
*/
if (mmutype == MMU_68040)
DCFP(kvtop(addr));
#endif
dmac->ccr = 0x88;
}
void
fdcdmaintr()
{
volatile struct dmac *dmac = &IODEVbase->io_dma[DRQ];
dmac->csr = 0xff;
PCIA(); /* XXX? by oki */
if (dma_bounced[DRQ] == DMA_BRD) {
bcopy(dma_bouncebuf[DRQ], dma_dataaddr[DRQ], dma_bouncebytes[DRQ]);
}
dma_bounced[DRQ] = 0;
}
void
fdcdmaerrintr()
{
volatile struct dmac *dmac = &IODEVbase->io_dma[DRQ];
printf("fdcdmaerrintr: csr=%x, cer=%x\n", dmac->csr, dmac->cer);
dmac->csr = 0xff;
}
int
fdcprobe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
if (strcmp("fdc", aux) != 0)
return 0;
return 1;
}
/*
* 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;
const char *fdc;
{
register struct fdc_attach_args *fa = aux;
if (!fdc)
printf(" drive %d", fa->fa_drive);
return QUIET;
}
void
fdcattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct fdc_softc *fdc = (void *)self;
volatile struct dmac *dmac = &IODEVbase->io_dma[DRQ];
struct fdc_attach_args fa;
fdc->sc_state = DEVIDLE;
TAILQ_INIT(&fdc->sc_drives);
fdc->sc_flags = 0;
/* reset */
ioctlr.intr &= (~FDDI_EN);
ioctlr.intr |= FDCI_EN;
fdcresult(fdc);
fdcreset();
/* Initialize DMAC channel */
dmac->dcr = 0x80;
dmac->scr = 0x04;
dmac->csr = 0xff;
dmac->cpr = 0x00;
dmac->dar = (unsigned long) kvtop((void *)&infdc.data);
dmac->mfc = 0x05;
dmac->dfc = 0x05;
dmac->bfc = 0x05;
dmac->niv = 0x64;
dmac->eiv = 0x65;
printf(": uPD72065 FDC\n");
out_fdc(NE7CMD_SPECIFY);/* specify command */
out_fdc(0xd0);
out_fdc(0x10);
fdc_dmabuf = (u_char *)malloc(NBPG, M_DEVBUF, M_WAITOK);
if (fdc_dmabuf == 0)
printf("fdcinit: WARNING!! malloc() failed.\n");
dma_bouncebuf[DRQ] = fdc_dmabuf;
/* physical limit: four drives per controller. */
for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) {
(void)config_found(self, (void *)&fa, fdprint);
}
}
void
fdcreset()
{
infdc.stat = FDC_RESET;
}
static int
fdcpoll(fdc)
struct fdc_softc *fdc;
{
int i = 25000;
while (--i > 0) {
if ((ioctlr.intr & 0x80)) {
out_fdc(NE7CMD_SENSEI);
fdcresult(fdc);
break;
}
DELAY(100);
}
return i;
}
int
fdprobe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct fdc_softc *fdc = (void *)parent;
struct cfdata *cf = match;
struct fd_type *type;
int drive = cf->cf_unit;
int n;
int found = 0;
int i;
if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != drive)
return 0;
type = &fd_types[0]; /* XXX 1.2MB */
ioctlr.intr &= (~FDCI_EN);
/* select drive and turn on motor */
infdc.select = 0x80 | (type->rate << 4)| drive;
fdc_force_ready(FDCRDY);
fdcpoll(fdc);
retry:
out_fdc(NE7CMD_RECAL);
out_fdc(drive);
i = 25000;
while (--i > 0) {
if ((ioctlr.intr & 0x80)) {
out_fdc(NE7CMD_SENSEI);
n = fdcresult(fdc);
break;
}
DELAY(100);
}
#ifdef FDDEBUG
{
int i;
printf("fdprobe: status");
for (i = 0; i < n; i++)
printf(" %x", fdc->sc_status[i]);
printf("\n");
}
#endif
if (n == 2) {
if ((fdc->sc_status[0] & 0xf0) == 0x20) {
found = 1;
} else if ((fdc->sc_status[0] & 0xf0) == 0xc0) {
goto retry;
}
}
/* turn off motor */
infdc.select = (type->rate << 4)| drive;
fdc_force_ready(FDCSTBY);
if (!found) {
ioctlr.intr |= FDCI_EN;
return 0;
}
return 1;
}
void
fdattach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct fdc_softc *fdc = (void *)parent;
register struct fd_softc *fd = (void *)self;
struct fdc_attach_args *fa = aux;
int drive = fa->fa_drive;
struct fd_type *type = &fd_types[0]; /* XXX 1.2MB */
fd->sc_flags = 0;
ioctlr.intr |= FDCI_EN;
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_copybuf = (u_char *)malloc(NBPG, M_DEVBUF, M_WAITOK);
if (fd->sc_copybuf == 0)
printf("fdprobe: WARNING!! malloc() failed.\n");
fd->sc_flags |= FD_ALIVE;
/*
* 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 anyway in case we booted
* with RB_ASKNAME and get selected as the boot device.
*/
mountroothook_establish(fd_mountroot_hook, &fd->sc_dev);
}
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 &fd_types[type];
}
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;
if (unit >= fd_cd.cd_ndevs ||
(fd = fd_cd.cd_devs[unit]) == 0 ||
bp->b_blkno < 0 ||
(bp->b_bcount % FDC_BSIZE) != 0) {
#ifdef FDDEBUG
printf("fdstrategy: unit=%d, blkno=%d, bcount=%d\n", unit,
bp->b_blkno, bp->b_bcount);
#endif
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 << (fd->sc_type->secsize - 2))) {
sz = (fd->sc_type->size << (fd->sc_type->secsize - 2)) - 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 * (1 << (fd->sc_type->secsize - 2)));
DPRINTF(("fdstrategy: %s b_blkno %d b_bcount %ld cylin %ld\n",
bp->b_flags & B_READ ? "read" : "write",
bp->b_blkno, bp->b_bcount, bp->b_cylin));
/* 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 = fdc_cd.cd_devs[0]; /* XXX */
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_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_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;
}
int
fdread(dev, uio)
dev_t dev;
struct uio *uio;
{
return (physio(fdstrategy, NULL, dev, B_READ, minphys, uio));
}
int
fdwrite(dev, uio)
dev_t dev;
struct uio *uio;
{
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;
int n;
DPRINTF(("fd_set_motor:\n"));
for (n = 0; n < 4; n++)
if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR)) {
infdc.select = 0x80 | (fd->sc_type->rate << 4)| n;
}
}
void
fd_motor_off(arg)
void *arg;
{
struct fd_softc *fd = arg;
int s;
DPRINTF(("fd_motor_off:\n"));
s = splbio();
fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
infdc.select = (fd->sc_type->rate << 4) | fd->sc_drive;
#if 0
fd_set_motor((struct fdc_softc *)&fdc_softc[0], 0); /* XXX */
#endif
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;
DPRINTF(("fd_motor_on:\n"));
s = splbio();
fd->sc_flags &= ~FD_MOTOR_WAIT;
if ((fdc->sc_drives.tqh_first == fd) && (fdc->sc_state == MOTORWAIT))
(void) fdcintr();
splx(s);
}
int
fdcresult(fdc)
struct fdc_softc *fdc;
{
u_char i;
int j = 100000,
n = 0;
for (; j; j--) {
i = infdc.stat & (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++] = infdc.data;
}
}
log(LOG_ERR, "fdcresult: timeout\n");
return -1;
}
int
out_fdc(x)
u_char x;
{
int i = 100000;
while ((infdc.stat & NE7_DIO) && i-- > 0);
if (i <= 0)
return -1;
while ((infdc.stat & NE7_RQM) == 0 && i-- > 0);
if (i <= 0)
return -1;
infdc.data = x;
return 0;
}
int
Fdopen(dev, flags, fmt)
dev_t dev;
int flags, fmt;
{
int unit;
struct fd_softc *fd;
struct fd_type *type;
unit = FDUNIT(dev);
if (unit >= fd_cd.cd_ndevs)
return ENXIO;
fd = fd_cd.cd_devs[unit];
if (fd == 0)
return ENXIO;
type = fd_dev_to_type(fd, dev);
if (type == NULL)
return ENXIO;
if ((fd->sc_flags & FD_OPEN) != 0 &&
fd->sc_type != type)
return EBUSY;
if ((fd->sc_flags & FD_OPEN) == 0) {
/* Lock eject button */
infdc.drvstat = 0x40 | ( 1 << unit);
infdc.drvstat = 0x40;
}
fd->sc_type = type;
fd->sc_cylin = -1;
switch (fmt) {
case S_IFCHR:
fd->sc_flags |= FD_COPEN;
break;
case S_IFBLK:
fd->sc_flags |= FD_BOPEN;
break;
}
fdgetdisklabel(fd, dev);
return 0;
}
int
fdclose(dev, flags, fmt)
dev_t dev;
int flags, fmt;
{
int unit = FDUNIT(dev);
struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)];
DPRINTF(("fdclose %d\n", unit));
switch (fmt) {
case S_IFCHR:
fd->sc_flags &= ~FD_COPEN;
break;
case S_IFBLK:
fd->sc_flags &= ~FD_BOPEN;
break;
}
if ((fd->sc_flags & FD_OPEN) == 0) {
infdc.drvstat = ( 1 << unit);
infdc.drvstat = 0x00;
}
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();
}
void
fdcstatus(dv, n, s)
struct device *dv;
int n;
char *s;
{
struct fdc_softc *fdc = (void *)dv->dv_parent;
if (n == 0) {
out_fdc(NE7CMD_SENSEI);
(void) fdcresult(fdc);
n = 2;
}
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_dev, 0, "timeout");
if (fd->sc_q.b_actf)
fdc->sc_state++;
else
fdc->sc_state = DEVIDLE;
(void) fdcintr();
splx(s);
}
void
fdcpseudointr(arg)
void *arg;
{
int s;
/* just ensure it has the right spl */
s = splbio();
(void) fdcintr();
splx(s);
}
int
fdcintr()
{
struct fdc_softc *fdc = fdc_cd.cd_devs[0]; /* XXX */
#define st0 fdc->sc_status[0]
#define cyl fdc->sc_status[1]
struct fd_softc *fd;
struct buf *bp;
int read, head, sec, pos, i, sectrac, nblks;
int tmp;
struct fd_type *type;
loop:
fd = fdc->sc_drives.tqh_first;
if (fd == NULL) {
DPRINTF(("fdcintr: set DEVIDLE\n"));
if (fdc->sc_state == DEVIDLE) {
if ((ioctlr.intr & 0x80)) {
out_fdc(NE7CMD_SENSEI);
if ((tmp = fdcresult(fdc)) != 2 || (st0 & 0xf8) != 0x20) {
goto loop;
}
}
}
/* no drives waiting; end */
fdc->sc_state = DEVIDLE;
return 1;
}
/* 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:
DPRINTF(("fdcintr: in DEVIDLE\n"));
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 other drives. */
for (i = 0; i < 4; i++) {
struct fd_softc *ofd = fdc->sc_fd[i];
if (ofd && ofd->sc_flags & FD_MOTOR) {
untimeout(fd_motor_off, ofd);
ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
break;
}
}
fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT;
fd_set_motor(fdc, 0);
fdc->sc_state = MOTORWAIT;
/* allow .5s for motor to stabilize */
timeout(fd_motor_on, fd, hz / 2);
return 1;
}
/* Make sure the right drive is selected. */
fd_set_motor(fdc, 0);
/* fall through */
case DOSEEK:
doseek:
DPRINTF(("fdcintr: in DOSEEK\n"));
if (fd->sc_cylin == bp->b_cylin)
goto doio;
out_fdc(NE7CMD_SPECIFY);/* specify command */
out_fdc(0xd0); /* XXX const */
out_fdc(0x10);
out_fdc(NE7CMD_SEEK); /* seek function */
out_fdc(fd->sc_drive); /* drive number */
out_fdc(bp->b_cylin * fd->sc_type->step);
fd->sc_cylin = -1;
fdc->sc_state = SEEKWAIT;
fd->sc_dk.dk_seek++;
disk_busy(&fd->sc_dk);
timeout(fdctimeout, fdc, 4 * hz);
return 1;
case DOIO:
doio:
DPRINTF(("fdcintr: DOIO: "));
type = fd->sc_type;
sectrac = type->sectrac;
pos = fd->sc_blkno % (sectrac * (1 << (type->secsize - 2)));
sec = pos / (1 << (type->secsize - 2));
if (type->secsize == 2) {
fd->sc_part = SEC_P11;
nblks = (sectrac - sec) << (type->secsize - 2);
nblks = min(nblks, fd->sc_bcount / FDC_BSIZE);
DPRINTF(("nblks(0)"));
} else if ((fd->sc_blkno % 2) == 0) {
if (fd->sc_bcount & 0x00000200) {
if (fd->sc_bcount == FDC_BSIZE) {
fd->sc_part = SEC_P10;
nblks = 1;
DPRINTF(("nblks(1)"));
} else {
fd->sc_part = SEC_P11;
nblks = (sectrac - sec) * 2;
nblks = min(nblks, fd->sc_bcount
/ FDC_BSIZE - 1);
DPRINTF(("nblks(2)"));
}
} else {
fd->sc_part = SEC_P11;
nblks = (sectrac - sec)
<< (type->secsize - 2);
nblks = min(nblks, fd->sc_bcount / FDC_BSIZE);
DPRINTF(("nblks(3)"));
}
} else {
fd->sc_part = SEC_P01;
nblks = 1;
DPRINTF(("nblks(4)"));
}
nblks = min(nblks, FDC_MAXIOSIZE / FDC_BSIZE);
DPRINTF((" %d\n", nblks));
fd->sc_nblks = nblks;
fd->sc_nbytes = nblks * FDC_BSIZE;
head = (fd->sc_blkno
% (type->seccyl * (1 << (type->secsize - 2))))
/ (type->sectrac * (1 << (type->secsize - 2)));
#ifdef DIAGNOSTIC
{int block;
block = ((fd->sc_cylin * type->heads + head) * type->sectrac
+ sec) * (1 << (type->secsize - 2));
block += (fd->sc_part == SEC_P01) ? 1 : 0;
if (block != fd->sc_blkno) {
printf("C H R N: %d %d %d %d\n", fd->sc_cylin, head, sec, type->secsize);
printf("fdcintr: doio: block %d != blkno %d\n", block, fd->sc_blkno);
#ifdef DDB
Debugger();
#endif
}}
#endif
read = bp->b_flags & B_READ;
DPRINTF(("fdcintr: %s drive %d track %d head %d sec %d nblks %d, skip %d\n",
read ? "read" : "write", fd->sc_drive, fd->sc_cylin,
head, sec, nblks, fd->sc_skip));
DPRINTF(("C H R N: %d %d %d %d\n", fd->sc_cylin, head, sec,
type->secsize));
if (fd->sc_part != SEC_P11)
goto docopy;
fdc_dmastart(read, bp->b_data + fd->sc_skip, fd->sc_nbytes);
if (read)
out_fdc(NE7CMD_READ); /* READ */
else
out_fdc(NE7CMD_WRITE); /* WRITE */
out_fdc((head << 2) | fd->sc_drive);
out_fdc(bp->b_cylin); /* cylinder */
out_fdc(head);
out_fdc(sec + 1); /* sector +1 */
out_fdc(type->secsize); /* sector size */
out_fdc(type->sectrac); /* sectors/track */
out_fdc(type->gap1); /* gap1 size */
out_fdc(type->datalen); /* data length */
fdc->sc_state = IOCOMPLETE;
disk_busy(&fd->sc_dk);
/* allow 2 seconds for operation */
timeout(fdctimeout, fdc, 2 * hz);
return 1; /* will return later */
case DOCOPY:
docopy:
DPRINTF(("fdcintr: DOCOPY:\n"));
fdc_dmastart(B_READ, fd->sc_copybuf, 1024);
out_fdc(NE7CMD_READ); /* READ */
out_fdc((head << 2) | fd->sc_drive);
out_fdc(bp->b_cylin); /* cylinder */
out_fdc(head);
out_fdc(sec + 1); /* sector +1 */
out_fdc(type->secsize); /* sector size */
out_fdc(type->sectrac); /* sectors/track */
out_fdc(type->gap1); /* gap1 size */
out_fdc(type->datalen); /* data length */
fdc->sc_state = COPYCOMPLETE;
/* allow 2 seconds for operation */
timeout(fdctimeout, fdc, 2 * hz);
return 1; /* will return later */
case DOIOHALF:
doiohalf:
DPRINTF((" DOIOHALF:\n"));
#ifdef DIAGNOSTIC
type = fd->sc_type;
sectrac = type->sectrac;
pos = fd->sc_blkno % (sectrac * (1 << (type->secsize - 2)));
sec = pos / (1 << (type->secsize - 2));
head = (fd->sc_blkno
% (type->seccyl * (1 << (type->secsize - 2))))
/ (type->sectrac * (1 << (type->secsize - 2)));
{int block;
block = ((fd->sc_cylin * type->heads + head) * type->sectrac + sec)
* (1 << (type->secsize - 2));
block += (fd->sc_part == SEC_P01) ? 1 : 0;
if (block != fd->sc_blkno) {
printf("fdcintr: block %d != blkno %d\n", block, fd->sc_blkno);
#ifdef DDB
Debugger();
#endif
}}
#endif
if (read = bp->b_flags & B_READ) {
bcopy(fd->sc_copybuf
+ (fd->sc_part & SEC_P01 ? FDC_BSIZE : 0),
bp->b_data + fd->sc_skip,
FDC_BSIZE);
fdc->sc_state = IOCOMPLETE;
goto iocomplete2;
} else {
bcopy(bp->b_data + fd->sc_skip,
fd->sc_copybuf
+ (fd->sc_part & SEC_P01 ? FDC_BSIZE : 0),
FDC_BSIZE);
fdc_dmastart(read, fd->sc_copybuf, 1024);
}
out_fdc(NE7CMD_WRITE); /* WRITE */
out_fdc((head << 2) | fd->sc_drive);
out_fdc(bp->b_cylin); /* cylinder */
out_fdc(head);
out_fdc(sec + 1); /* sector +1 */
out_fdc(fd->sc_type->secsize); /* sector size */
out_fdc(sectrac); /* sectors/track */
out_fdc(fd->sc_type->gap1); /* gap1 size */
out_fdc(fd->sc_type->datalen); /* data length */
fdc->sc_state = IOCOMPLETE;
/* allow 2 seconds for operation */
timeout(fdctimeout, fdc, 2 * hz);
return 1; /* will return later */
case SEEKWAIT:
untimeout(fdctimeout, fdc);
fdc->sc_state = SEEKCOMPLETE;
/* allow 1/50 second for heads to settle */
/* timeout(fdcpseudointr, fdc, hz / 50);*/
return 1;
case SEEKCOMPLETE:
/* Make sure seek really happened */
DPRINTF(("fdcintr: SEEKCOMPLETE: FDC status = %x\n",
infdc.stat));
out_fdc(NE7CMD_SENSEI);
tmp = fdcresult(fdc);
if ((st0 & 0xf8) == 0xc0) {
DPRINTF(("fdcintr: first seek!\n"));
fdc->sc_state = DORECAL;
goto loop;
} else if (tmp != 2 || (st0 & 0xf8) != 0x20 || cyl != bp->b_cylin) {
#ifdef FDDEBUG
fdcstatus(&fd->sc_dev, 2, "seek failed");
#endif
fdcretry(fdc);
goto loop;
}
fd->sc_cylin = bp->b_cylin;
goto doio;
case IOTIMEDOUT:
#if 0
isa_dmaabort(fdc->sc_drq);
#endif
case SEEKTIMEDOUT:
case RECALTIMEDOUT:
case RESETTIMEDOUT:
fdcretry(fdc);
goto loop;
case IOCOMPLETE: /* IO DONE, post-analyze */
untimeout(fdctimeout, fdc);
DPRINTF(("fdcintr: in IOCOMPLETE\n"));
if ((tmp = fdcresult(fdc)) != 7 || (st0 & 0xf8) != 0) {
printf("fdcintr: resnum=%d, st0=%x\n", tmp, st0);
#if 0
isa_dmaabort(fdc->sc_drq);
#endif
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);
fdcretry(fdc);
goto loop;
}
#if 0
isa_dmadone(bp->b_flags & B_READ, bp->b_data + fd->sc_skip,
nblks * FDC_BSIZE, fdc->sc_drq);
#endif
iocomplete2:
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;
DPRINTF(("fd->sc_bcount = %d\n", fd->sc_bcount));
if (fd->sc_bcount > 0) {
bp->b_cylin = fd->sc_blkno
/ (fd->sc_type->seccyl
* (1 << (fd->sc_type->secsize - 2)));
goto doseek;
}
fdfinish(fd, bp);
goto loop;
case COPYCOMPLETE: /* IO DONE, post-analyze */
DPRINTF(("fdcintr: COPYCOMPLETE:"));
untimeout(fdctimeout, fdc);
if ((tmp = fdcresult(fdc)) != 7 || (st0 & 0xf8) != 0) {
printf("fdcintr: resnum=%d, st0=%x\n", tmp, st0);
#if 0
isa_dmaabort(fdc->sc_drq);
#endif
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);
fdcretry(fdc);
goto loop;
}
goto doiohalf;
case DORESET:
DPRINTF(("fdcintr: in DORESET\n"));
/* 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:
DPRINTF(("fdcintr: in RESETCOMPLETE\n"));
untimeout(fdctimeout, fdc);
/* clear the controller output buffer */
for (i = 0; i < 4; i++) {
out_fdc(NE7CMD_SENSEI);
(void) fdcresult(fdc);
}
/* fall through */
case DORECAL:
DPRINTF(("fdcintr: in DORECAL\n"));
out_fdc(NE7CMD_RECAL); /* recalibrate function */
out_fdc(fd->sc_drive);
fdc->sc_state = RECALWAIT;
timeout(fdctimeout, fdc, 5 * hz);
return 1; /* will return later */
case RECALWAIT:
DPRINTF(("fdcintr: in RECALWAIT\n"));
untimeout(fdctimeout, fdc);
fdc->sc_state = RECALCOMPLETE;
/* allow 1/30 second for heads to settle */
/* timeout(fdcpseudointr, fdc, hz / 30);*/
return 1; /* will return later */
case RECALCOMPLETE:
DPRINTF(("fdcintr: in RECALCOMPLETE\n"));
out_fdc(NE7CMD_SENSEI);
tmp = fdcresult(fdc);
if ((st0 & 0xf8) == 0xc0) {
DPRINTF(("fdcintr: first seek!\n"));
fdc->sc_state = DORECAL;
goto loop;
} else if (tmp != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) {
#ifdef FDDEBUG
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;
{
struct fd_softc *fd;
struct buf *bp;
DPRINTF(("fdcretry:\n"));
fd = fdc->sc_drives.tqh_first;
bp = fd->sc_q.b_actf;
switch (fdc->sc_errors) {
case 0:
/* try again */
fdc->sc_state = 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, (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(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
/* Not implemented. */
return ENXIO;
}
int
fdioctl(dev, cmd, addr, flag)
dev_t dev;
u_long cmd;
caddr_t addr;
int flag;
{
struct fd_softc *fd = fd_cd.cd_devs[FDUNIT(dev)];
int unit = FDUNIT(dev);
struct disklabel buffer;
int error;
DPRINTF(("fdioctl:\n"));
switch (cmd) {
case DIOCGDINFO:
#if 1
*(struct disklabel *)addr = *(fd->sc_dk.dk_label);
return(0);
#else
bzero(&buffer, sizeof(buffer));
buffer.d_secpercyl = fd->sc_type->seccyl;
buffer.d_type = DTYPE_FLOPPY;
buffer.d_secsize = 128 << fd->sc_type->secsize;
if (readdisklabel(dev, fdstrategy, &buffer, NULL) != NULL)
return EINVAL;
*(struct disklabel *)addr = buffer;
return 0;
#endif
case DIOCGPART:
((struct partinfo *)addr)->disklab = fd->sc_dk.dk_label;
((struct partinfo *)addr)->part =
&fd->sc_dk.dk_label->d_partitions[DISKPART(dev)];
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 DIOCLOCK:
/*
* Nothing to do here, really.
*/
return 0; /* XXX */
case DIOCEJECT:
fd_do_eject(unit);
return 0;
default:
return ENOTTY;
}
#ifdef DIAGNOSTIC
panic("fdioctl: impossible");
#endif
}
void
fd_do_eject(unit)
int unit;
{
infdc.drvstat = 0x20 | ( 1 << unit);
DELAY(1); /* XXX */
infdc.drvstat = 0x20;
}
/*
* Build disk label. For now we only create a label from what we know
* from 'sc'.
*/
static int
fdgetdisklabel(sc, dev)
struct fd_softc *sc;
dev_t dev;
{
struct disklabel *lp;
int part;
#ifdef FDDEBUG
printf("fdgetdisklabel()\n");
#endif
part = DISKPART(dev);
lp = sc->sc_dk.dk_label;
bzero(lp, sizeof(struct disklabel));
lp->d_secsize = 128 << sc->sc_type->secsize;
lp->d_ntracks = sc->sc_type->heads;
lp->d_nsectors = sc->sc_type->sectrac;
lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
lp->d_ncylinders = sc->sc_type->size / lp->d_secpercyl;
lp->d_secperunit = sc->sc_type->size;
lp->d_type = DTYPE_FLOPPY;
lp->d_rpm = 300; /* XXX */
lp->d_interleave = 1; /* FIXME: is this OK? */
lp->d_bbsize = 0;
lp->d_sbsize = 0;
lp->d_npartitions = part + 1;
#define STEP_DELAY 6000 /* 6ms (6000us) delay after stepping */
lp->d_trkseek = STEP_DELAY; /* XXX */
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = dkcksum(lp);
lp->d_partitions[part].p_size = lp->d_secperunit;
lp->d_partitions[part].p_fstype = FS_UNUSED;
lp->d_partitions[part].p_fsize = 1024;
lp->d_partitions[part].p_frag = 8;
return(0);
}
/* ARGSUSED */
void
fd_mountroot_hook(dev)
struct device *dev;
{
int c;
fd_do_eject(dev->dv_unit);
printf("Insert filesystem floppy and press return.");
for (;;) {
c = cngetc();
if ((c == '\r') || (c == '\n')) {
printf("\n");
return;
}
}
}
Reference in New Issue View Git Blame Copy Permalink