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92ed385a09
freebsd-skq/sys/isa/fd.c
Rodney W. Grimes 92ed385a09 >From: bde@kralizec.zeta.org.au (Bruce Evans) 
Date: Thu, 16 Sep 93 01:35:10 +1000
Julian writes:

>In fact DEVIDLE and FINDWORK ended up being basically equivalent.
>the bit I wonder about, is the returning of 0.. What (other than
>another request from somewhere else in the kernel) is going to start
>work on the next item on the queue?

I think removing FINDWORK would make things clearer.

Nothing much is going to start work on the next item.  However, it is
pointless to continue processing the queue for the same unready drive.
Aborting all reads and trying harder to perform all writes would be
better.
Julian writes.

> no, actually it should be:
> fdt = fd_data[FDUNIT(minor(dev))].ft;

Fixed.
From: bde@kralizec.zeta.org.au (Bruce Evans)
Date: Thu, 16 Sep 93 22:56:01 +1000
The fd driver reported the wrong cylinder/head/sector numbers after an
error (ST3 is only valid after a sense-drive command), and didn't report
fs block numbers (diskerr was not used).

There was an old problem with writes to block fd devices.   Try this:

1. write protect floppy in fd0.
2. tar cf /dev/fd0a /dev/null.  Repeat a few times.  Later writes tend to
   terminate earlier.
   3. un-write protect floppy.
   4. repeat step 2.  The writes tend to return 0, 2048, 4096, ... and then
      succeed.

This was caused by a bug in vfs__bios.c.  (The bug is fixed in NetBSD's
vfs_bio.c.)  fd.c sets bp->b_resid to nonzero after an error.  vfs__bios.c
was not initializing bp->b_resid.  This causes some writes to terminate
early (e.g., writes to block devices; see spec_write()).

Related funnies:

1. Nothing tries to write the residual bytes.
2. The wd driver sets bp->b_resid to 0 after an error, so there's no
   way anything else could write the residual bytes.
3. I use the block fd device for tar because the raw device seemed to
   have more bugs long ago, and because it ought to be able to handle
   buffering more transparently (I don't want to have to know the
   device size).  But spec_write() always uses the size BLKDEV_IOSIZE
   == 2048 which is too small.  For disks it should use the size of
   one track (rounded down to meet the next track boundary or the i/o
   size).  Here it would help if the DIOCGPART ioctl worked.  But
   DIOCGPART is not implemented for floppies, and the disk size is
   ignored except for partitions of type FS_BSDFFS.

Bruce
1993-09-23 15:22:57 +00:00

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/*#define DEBUG 1*/
/*-
* 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.
*
* from: @(#)fd.c 7.4 (Berkeley) 5/25/91
* $Id: fd.c,v 1.5 1993/09/15 23:27:45 rgrimes Exp $
*
*/
#include "fd.h"
#if NFD > 0
#include "param.h"
#include "dkbad.h"
#include "systm.h"
#include "conf.h"
#include "file.h"
#include "ioctl.h"
#include "disklabel.h"
#include "buf.h"
#include "uio.h"
#include "syslog.h"
#include "i386/isa/isa.h"
#include "i386/isa/isa_device.h"
#include "i386/isa/fdreg.h"
#include "i386/isa/icu.h"
#include "i386/isa/rtc.h"
#undef NFD
#define NFD 2
#define FDUNIT(s) ((s>>3)&1)
#define FDTYPE(s) ((s)&7)
#define b_cylin b_resid
#define FDBLK 512
#define NUMTYPES 4
struct fd_type {
int sectrac; /* sectors per track */
int secsize; /* size code for sectors */
int datalen; /* data len when secsize = 0 */
int gap; /* gap len between sectors */
int tracks; /* total num of tracks */
int size; /* size of disk in sectors */
int steptrac; /* steps per cylinder */
int trans; /* transfer speed code */
int heads; /* number of heads */
};
struct fd_type fd_types[NUMTYPES] =
{
{ 18,2,0xFF,0x1B,80,2880,1,0,2 }, /* 1.44 meg HD 3.5in floppy */
{ 15,2,0xFF,0x1B,80,2400,1,0,2 }, /* 1.2 meg HD floppy */
{ 9,2,0xFF,0x23,40,720,2,1,2 }, /* 360k floppy in 1.2meg drive */
{ 9,2,0xFF,0x2A,40,720,1,1,2 }, /* 360k floppy in DD drive */
};
#define DRVS_PER_CTLR 2
/***********************************************************************\
* Per controller structure. *
\***********************************************************************/
struct fdc_data
{
int fdcu; /* our unit number */
int baseport;
int dmachan;
int flags;
#define FDC_ATTACHED 0x01
struct fd_data *fd;
int fdu; /* the active drive */
struct buf head; /* Head of buf chain */
struct buf rhead; /* Raw head of buf chain */
int state;
int retry;
int status[7]; /* copy of the registers */
}fdc_data[(NFD+1)/DRVS_PER_CTLR];
/***********************************************************************\
* Per drive structure. *
* N per controller (presently 2) (DRVS_PER_CTLR) *
\***********************************************************************/
struct fd_data {
struct fdc_data *fdc;
int fdu; /* this unit number */
int fdsu; /* this units number on this controller */
int type; /* Drive type (HD, DD */
struct fd_type *ft; /* pointer to the type descriptor */
int flags;
#define FD_OPEN 0x01 /* it's open */
#define FD_ACTIVE 0x02 /* it's active */
#define FD_MOTOR 0x04 /* motor should be on */
#define FD_MOTOR_WAIT 0x08 /* motor coming up */
int skip;
int hddrv;
int track; /* where we think the head is */
} fd_data[NFD];
/***********************************************************************\
* Throughout this file the following conventions will be used: *
* fd is a pointer to the fd_data struct for the drive in question *
* fdc is a pointer to the fdc_data struct for the controller *
* fdu is the floppy drive unit number *
* fdcu is the floppy controller unit number *
* fdsu is the floppy drive unit number on that controller. (sub-unit) *
\***********************************************************************/
typedef int fdu_t;
typedef int fdcu_t;
typedef int fdsu_t;
typedef struct fd_data *fd_p;
typedef struct fdc_data *fdc_p;
#define DEVIDLE 0
#define FINDWORK 1
#define DOSEEK 2
#define SEEKCOMPLETE 3
#define IOCOMPLETE 4
#define RECALCOMPLETE 5
#define STARTRECAL 6
#define RESETCTLR 7
#define SEEKWAIT 8
#define RECALWAIT 9
#define MOTORWAIT 10
#define IOTIMEDOUT 11
#ifdef DEBUG
char *fdstates[] =
{
"DEVIDLE",
"FINDWORK",
"DOSEEK",
"SEEKCOMPLETE",
"IOCOMPLETE",
"RECALCOMPLETE",
"STARTRECAL",
"RESETCTLR",
"SEEKWAIT",
"RECALWAIT",
"MOTORWAIT",
"IOTIMEDOUT"
};
int fd_debug = 1;
#define TRACE0(arg) if(fd_debug) printf(arg)
#define TRACE1(arg1,arg2) if(fd_debug) printf(arg1,arg2)
#else DEBUG
#define TRACE0(arg)
#define TRACE1(arg1,arg2)
#endif DEBUG
extern int hz;
/* state needed for current transfer */
/****************************************************************************/
/* autoconfiguration stuff */
/****************************************************************************/
int fdprobe(), fdattach(), fd_turnoff();
struct isa_driver fddriver = {
fdprobe, fdattach, "fd",
};
/*
* probe for existance of controller
*/
fdprobe(dev)
struct isa_device *dev;
{
fdcu_t fdcu = dev->id_unit;
if(fdc_data[fdcu].flags & FDC_ATTACHED)
{
printf("fdc: same unit (%d) used multiple times\n",fdcu);
return 0;
}
fdc_data[fdcu].baseport = dev->id_iobase;
/* see if it can handle a command */
if (out_fdc(fdcu,NE7CMD_SPECIFY) < 0)
{
return(0);
}
out_fdc(fdcu,0xDF);
out_fdc(fdcu,2);
return (IO_FDCSIZE);
}
/*
* wire controller into system, look for floppy units
*/
fdattach(dev)
struct isa_device *dev;
{
unsigned fdt,st0, cyl;
int hdr;
fdu_t fdu;
fdcu_t fdcu = dev->id_unit;
fdc_p fdc = fdc_data + fdcu;
fd_p fd;
int fdsu;
fdc->fdcu = fdcu;
fdc->flags |= FDC_ATTACHED;
fdc->dmachan = dev->id_drq;
fdc->state = DEVIDLE;
fdt = rtcin(RTC_FDISKETTE);
hdr = 0;
/* check for each floppy drive */
for (fdu = (fdcu * DRVS_PER_CTLR),fdsu = 0;
((fdu < NFD) && (fdsu < DRVS_PER_CTLR));
fdu++,fdsu++)
{
/* is there a unit? */
if ((fdt & 0xf0) == RTCFDT_NONE) {
#define NO_TYPE NUMTYPES
fd_data[fdu].type = NO_TYPE;
continue;
}
#ifdef notyet
/* select it */
fd_turnon1(fdu);
spinwait(1000); /* 1 sec */
out_fdc(fdcu,NE7CMD_RECAL); /* Recalibrate Function */
out_fdc(fdcu,fdsu);
spinwait(1000); /* 1 sec */
/* anything responding */
out_fdc(fdcu,NE7CMD_SENSEI);
st0 = in_fdc(fdcu);
cyl = in_fdc(fdcu);
if (st0 & 0xd0)
continue;
#endif
fd_data[fdu].track = -2;
fd_data[fdu].fdc = fdc;
fd_data[fdu].fdsu = fdsu;
printf("fd%d: unit %d type ", fdcu, fdu);
if ((fdt & 0xf0) == RTCFDT_12M) {
printf("1.2MB 5.25in\n");
fd_data[fdu].type = 1;
fd_data[fdu].ft = fd_types + 1;
}
if ((fdt & 0xf0) == RTCFDT_144M) {
printf("1.44MB 3.5in\n");
fd_data[fdu].type = 0;
fd_data[fdu].ft = fd_types + 0;
}
fdt <<= 4;
fd_turnoff(fdu);
hdr = 1;
}
/* Set transfer to 500kbps */
outb(fdc->baseport+fdctl,0); /*XXX*/
}
int
fdsize(dev)
dev_t dev;
{
return(0);
}
/****************************************************************************/
/* fdstrategy */
/****************************************************************************/
fdstrategy(bp)
register struct buf *bp; /* IO operation to perform */
{
register struct buf *dp,*dp0,*dp1;
long nblocks,blknum;
int s;
fdcu_t fdcu;
fdu_t fdu;
fdc_p fdc;
fd_p fd;
fdu = FDUNIT(minor(bp->b_dev));
fd = &fd_data[fdu];
fdc = fd->fdc;
fdcu = fdc->fdcu;
/*type = FDTYPE(minor(bp->b_dev));*/
if ((fdu >= NFD) || (bp->b_blkno < 0)) {
printf("fdstrat: fdu = %d, blkno = %d, bcount = %d\n",
fdu, bp->b_blkno, bp->b_bcount);
pg("fd:error in fdstrategy");
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto bad;
}
/*
* Set up block calculations.
*/
blknum = (unsigned long) bp->b_blkno * DEV_BSIZE/FDBLK;
nblocks = fd->ft->size;
if (blknum + (bp->b_bcount / FDBLK) > nblocks) {
if (blknum == nblocks) {
bp->b_resid = bp->b_bcount;
} else {
bp->b_error = ENOSPC;
bp->b_flags |= B_ERROR;
}
goto bad;
}
bp->b_cylin = blknum / (fd->ft->sectrac * fd->ft->heads);
dp = &(fdc->head);
s = splbio();
disksort(dp, bp);
untimeout(fd_turnoff,fdu); /* a good idea */
fdstart(fdcu);
splx(s);
return;
bad:
biodone(bp);
}
/****************************************************************************/
/* motor control stuff */
/* remember to not deselect the drive we're working on */
/****************************************************************************/
set_motor(fdcu, fdu, reset)
fdcu_t fdcu;
fdu_t fdu;
int reset;
{
int m0,m1;
int selunit;
fd_p fd;
if(fd = fdc_data[fdcu].fd)/* yes an assign! */
{
selunit = fd->fdsu;
}
else
{
selunit = 0;
}
m0 = fd_data[fdcu * DRVS_PER_CTLR + 0].flags & FD_MOTOR;
m1 = fd_data[fdcu * DRVS_PER_CTLR + 1].flags & FD_MOTOR;
outb(fdc_data[fdcu].baseport+fdout,
selunit
| (reset ? 0 : (FDO_FRST|FDO_FDMAEN))
| (m0 ? FDO_MOEN0 : 0)
| (m1 ? FDO_MOEN1 : 0));
TRACE1("[0x%x->fdout]",(
selunit
| (reset ? 0 : (FDO_FRST|FDO_FDMAEN))
| (m0 ? FDO_MOEN0 : 0)
| (m1 ? FDO_MOEN1 : 0)));
}
fd_turnoff(fdu)
fdu_t fdu;
{
int s;
fd_p fd = fd_data + fdu;
s = splbio();
fd->flags &= ~FD_MOTOR;
set_motor(fd->fdc->fdcu,fd->fdsu,0);
splx(s);
}
fd_motor_on(fdu)
fdu_t fdu;
{
int s;
fd_p fd = fd_data + fdu;
s = splbio();
fd->flags &= ~FD_MOTOR_WAIT;
if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
{
fdintr(fd->fdc->fdcu);
}
splx(s);
}
fd_turnon(fdu)
fdu_t fdu;
{
fd_p fd = fd_data + fdu;
if(!(fd->flags & FD_MOTOR))
{
fd_turnon1(fdu);
fd->flags |= FD_MOTOR_WAIT;
timeout(fd_motor_on,fdu,hz); /* in 1 sec its ok */
}
}
fd_turnon1(fdu)
fdu_t fdu;
{
fd_p fd = fd_data + fdu;
fd->flags |= FD_MOTOR;
set_motor(fd->fdc->fdcu,fd->fdsu,0);
}
/****************************************************************************/
/* fdc in/out */
/****************************************************************************/
int
in_fdc(fdcu)
fdcu_t fdcu;
{
int baseport = fdc_data[fdcu].baseport;
int i, j = 100000;
while ((i = inb(baseport+fdsts) & (NE7_DIO|NE7_RQM))
!= (NE7_DIO|NE7_RQM) && j-- > 0)
if (i == NE7_RQM) return -1;
if (j <= 0)
return(-1);
#ifdef DEBUG
i = inb(baseport+fddata);
TRACE1("[fddata->0x%x]",(unsigned char)i);
return(i);
#else
return inb(baseport+fddata);
#endif
}
out_fdc(fdcu, x)
fdcu_t fdcu;
int x;
{
int baseport = fdc_data[fdcu].baseport;
int i;
/* Check that the direction bit is set */
i = 100000;
while ((inb(baseport+fdsts) & NE7_DIO) && i-- > 0);
if (i <= 0) return (-1); /* Floppy timed out */
/* Check that the floppy controller is ready for a command */
i = 100000;
while ((inb(baseport+fdsts) & NE7_RQM) == 0 && i-- > 0);
if (i <= 0) return (-1); /* Floppy timed out */
/* Send the command and return */
outb(baseport+fddata,x);
TRACE1("[0x%x->fddata]",x);
return (0);
}
/****************************************************************************/
/* fdopen/fdclose */
/****************************************************************************/
Fdopen(dev, flags)
dev_t dev;
int flags;
{
fdu_t fdu = FDUNIT(minor(dev));
/*int type = FDTYPE(minor(dev));*/
int s;
/* check bounds */
if (fdu >= NFD || fd_data[fdu].type == NO_TYPE) return(ENXIO);
/*if (type >= NUMTYPES) return(ENXIO);*/
fd_data[fdu].flags |= FD_OPEN;
return 0;
}
fdclose(dev, flags)
dev_t dev;
{
fdu_t fdu = FDUNIT(minor(dev));
fd_data[fdu].flags &= ~FD_OPEN;
return(0);
}
/***************************************************************\
* fdstart *
* We have just queued something.. if the controller is not busy *
* then simulate the case where it has just finished a command *
* So that it (the interrupt routine) looks on the queue for more*
* work to do and picks up what we just added. *
* If the controller is already busy, we need do nothing, as it *
* will pick up our work when the present work completes *
\***************************************************************/
fdstart(fdcu)
fdcu_t fdcu;
{
register struct buf *dp,*bp;
int s;
fdu_t fdu;
s = splbio();
if(fdc_data[fdcu].state == DEVIDLE)
{
fdintr(fdcu);
}
splx(s);
}
fd_timeout(fdcu)
fdcu_t fdcu;
{
fdu_t fdu = fdc_data[fdcu].fdu;
int st0, st3, cyl;
struct buf *dp,*bp;
int s;
dp = &fdc_data[fdcu].head;
s = splbio();
bp = dp->b_actf;
out_fdc(fdcu,NE7CMD_SENSED);
out_fdc(fdcu,fd_data[fdu].hddrv);
st3 = in_fdc(fdcu);
out_fdc(fdcu,NE7CMD_SENSEI);
st0 = in_fdc(fdcu);
cyl = in_fdc(fdcu);
printf("fd%d: Operation timeout ST0 %b cyl %d ST3 %b\n",
fdu,
st0,
NE7_ST0BITS,
cyl,
st3,
NE7_ST3BITS);
if (bp)
{
retrier(fdcu);
fdc_data[fdcu].status[0] = 0xc0;
fdc_data[fdcu].state = IOTIMEDOUT;
if( fdc_data[fdcu].retry < 6)
fdc_data[fdcu].retry = 6;
}
else
{
fdc_data[fdcu].fd = (fd_p) 0;
fdc_data[fdcu].fdu = -1;
fdc_data[fdcu].state = DEVIDLE;
}
fdintr(fdcu);
splx(s);
}
/* just ensure it has the right spl */
fd_pseudointr(fdcu)
fdcu_t fdcu;
{
int s;
s = splbio();
fdintr(fdcu);
splx(s);
}
/***********************************************************************\
* fdintr *
* keep calling the state machine until it returns a 0 *
* ALWAYS called at SPLBIO *
\***********************************************************************/
fdintr(fdcu)
fdcu_t fdcu;
{
fdc_p fdc = fdc_data + fdcu;
while(fdstate(fdcu, fdc));
}
/***********************************************************************\
* The controller state machine. *
* if it returns a non zero value, it should be called again immediatly *
\***********************************************************************/
int fdstate(fdcu, fdc)
fdcu_t fdcu;
fdc_p fdc;
{
int read,head,trac,sec,i,s,sectrac,cyl,st0;
unsigned long blknum;
fdu_t fdu = fdc->fdu;
fd_p fd;
register struct buf *dp,*bp;
dp = &(fdc->head);
bp = dp->b_actf;
if(!bp)
{
/***********************************************\
* nothing left for this controller to do *
* Force into the IDLE state, *
\***********************************************/
fdc->state = DEVIDLE;
if(fdc->fd)
{
printf("unexpected valid fd pointer (fdu = %d)\n"
,fdc->fdu);
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
}
TRACE1("[fdc%d IDLE]",fdcu);
return(0);
}
fdu = FDUNIT(minor(bp->b_dev));
fd = fd_data + fdu;
if (fdc->fd && (fd != fdc->fd))
{
printf("confused fd pointers\n");
}
read = bp->b_flags & B_READ;
TRACE1("fd%d",fdu);
TRACE1("[%s]",fdstates[fdc->state]);
TRACE1("(0x%x)",fd->flags);
untimeout(fd_turnoff, fdu);
timeout(fd_turnoff,fdu,4 * hz);
switch (fdc->state)
{
case DEVIDLE:
case FINDWORK: /* we have found new work */
fdc->retry = 0;
fd->skip = 0;
fdc->fd = fd;
fdc->fdu = fdu;
/*******************************************************\
* If the next drive has a motor startup pending, then *
* it will start up in it's own good time *
\*******************************************************/
if(fd->flags & FD_MOTOR_WAIT)
{
fdc->state = MOTORWAIT;
return(0); /* come back later */
}
/*******************************************************\
* Maybe if it's not starting, it SHOULD be starting *
\*******************************************************/
if (!(fd->flags & FD_MOTOR))
{
fdc->state = MOTORWAIT;
fd_turnon(fdu);
return(0);
}
else /* at least make sure we are selected */
{
set_motor(fdcu,fd->fdsu,0);
}
fdc->state = DOSEEK;
break;
case DOSEEK:
if (bp->b_cylin == fd->track)
{
fdc->state = SEEKCOMPLETE;
break;
}
out_fdc(fdcu,NE7CMD_SEEK); /* Seek function */
out_fdc(fdcu,fd->fdsu); /* Drive number */
out_fdc(fdcu,bp->b_cylin * fd->ft->steptrac);
fd->track = -2;
fdc->state = SEEKWAIT;
timeout(fd_timeout,fdcu,2 * hz);
return(0); /* will return later */
case SEEKWAIT:
untimeout(fd_timeout,fdcu);
/* allow heads to settle */
timeout(fd_pseudointr,fdcu,hz/50);
fdc->state = SEEKCOMPLETE;
return(0); /* will return later */
break;
case SEEKCOMPLETE : /* SEEK DONE, START DMA */
/* Make sure seek really happened*/
if(fd->track == -2)
{
int descyl = bp->b_cylin * fd->ft->steptrac;
out_fdc(fdcu,NE7CMD_SENSEI);
i = in_fdc(fdcu);
cyl = in_fdc(fdcu);
if (cyl != descyl)
{
printf("fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n", fdu,
descyl, cyl, i, NE7_ST0BITS);
return(retrier(fdcu));
}
}
fd->track = bp->b_cylin;
isa_dmastart(bp->b_flags, bp->b_un.b_addr+fd->skip,
FDBLK, fdc->dmachan);
blknum = (unsigned long)bp->b_blkno*DEV_BSIZE/FDBLK
+ fd->skip/FDBLK;
sectrac = fd->ft->sectrac;
sec = blknum % (sectrac * fd->ft->heads);
head = sec / sectrac;
sec = sec % sectrac + 1;
/*XXX*/ fd->hddrv = ((head&1)<<2)+fdu;
if (read)
{
out_fdc(fdcu,NE7CMD_READ); /* READ */
}
else
{
out_fdc(fdcu,NE7CMD_WRITE); /* WRITE */
}
out_fdc(fdcu,head << 2 | fdu); /* head & unit */
out_fdc(fdcu,fd->track); /* track */
out_fdc(fdcu,head);
out_fdc(fdcu,sec); /* sector XXX +1? */
out_fdc(fdcu,fd->ft->secsize); /* sector size */
out_fdc(fdcu,sectrac); /* sectors/track */
out_fdc(fdcu,fd->ft->gap); /* gap size */
out_fdc(fdcu,fd->ft->datalen); /* data length */
fdc->state = IOCOMPLETE;
timeout(fd_timeout,fdcu,2 * hz);
return(0); /* will return later */
case IOCOMPLETE: /* IO DONE, post-analyze */
untimeout(fd_timeout,fdcu);
for(i=0;i<7;i++)
{
fdc->status[i] = in_fdc(fdcu);
}
case IOTIMEDOUT: /*XXX*/
isa_dmadone(bp->b_flags, bp->b_un.b_addr+fd->skip,
FDBLK, fdc->dmachan);
if (fdc->status[0]&0xF8)
{
return(retrier(fdcu));
}
/* All OK */
fd->skip += FDBLK;
if (fd->skip < bp->b_bcount)
{
/* set up next transfer */
blknum = (unsigned long)bp->b_blkno*DEV_BSIZE/FDBLK
+ fd->skip/FDBLK;
bp->b_cylin = (blknum / (fd->ft->sectrac * fd->ft->heads));
fdc->state = DOSEEK;
}
else
{
/* ALL DONE */
fd->skip = 0;
bp->b_resid = 0;
dp->b_actf = bp->av_forw;
biodone(bp);
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
fdc->state = FINDWORK;
}
return(1);
case RESETCTLR:
/* Try a reset, keep motor on */
set_motor(fdcu,fd->fdsu,1);
DELAY(100);
set_motor(fdcu,fd->fdsu,0);
outb(fdc->baseport+fdctl,fd->ft->trans);
TRACE1("[0x%x->fdctl]",fd->ft->trans);
fdc->retry++;
fdc->state = STARTRECAL;
break;
case STARTRECAL:
out_fdc(fdcu,NE7CMD_SPECIFY); /* specify command */
out_fdc(fdcu,0xDF);
out_fdc(fdcu,2);
out_fdc(fdcu,NE7CMD_RECAL); /* Recalibrate Function */
out_fdc(fdcu,fdu);
fdc->state = RECALWAIT;
return(0); /* will return later */
case RECALWAIT:
/* allow heads to settle */
timeout(fd_pseudointr,fdcu,hz/30);
fdc->state = RECALCOMPLETE;
return(0); /* will return later */
case RECALCOMPLETE:
out_fdc(fdcu,NE7CMD_SENSEI);
st0 = in_fdc(fdcu);
cyl = in_fdc(fdcu);
if (cyl != 0)
{
printf("fd%d: recal failed ST0 %b cyl %d\n", fdu,
st0, NE7_ST0BITS, cyl);
return(retrier(fdcu));
}
fd->track = 0;
/* Seek (probably) necessary */
fdc->state = DOSEEK;
return(1); /* will return immediatly */
case MOTORWAIT:
if(fd->flags & FD_MOTOR_WAIT)
{
return(0); /* time's not up yet */
}
fdc->state = DOSEEK;
return(1); /* will return immediatly */
default:
printf("Unexpected FD int->");
out_fdc(fdcu,NE7CMD_SENSEI);
st0 = in_fdc(fdcu);
cyl = in_fdc(fdcu);
printf("ST0 = %lx, PCN = %lx\n",i,sec);
out_fdc(fdcu,0x4A);
out_fdc(fdcu,fd->fdsu);
for(i=0;i<7;i++) {
fdc->status[i] = in_fdc(fdcu);
}
printf("intr status :%lx %lx %lx %lx %lx %lx %lx ",
fdc->status[0],
fdc->status[1],
fdc->status[2],
fdc->status[3],
fdc->status[4],
fdc->status[5],
fdc->status[6] );
return(0);
}
return(1); /* Come back immediatly to new state */
}
retrier(fdcu)
fdcu_t fdcu;
{
fdc_p fdc = fdc_data + fdcu;
register struct buf *dp,*bp;
dp = &(fdc->head);
bp = dp->b_actf;
switch(fdc->retry)
{
case 0: case 1: case 2:
fdc->state = SEEKCOMPLETE;
break;
case 3: case 4: case 5:
fdc->state = STARTRECAL;
break;
case 6:
fdc->state = RESETCTLR;
break;
case 7:
break;
default:
{
diskerr(bp, "fd", "hard error", LOG_PRINTF,
fdc->fd->skip, (struct disklabel *)NULL);
printf(" (ST0 %b ", fdc->status[0], NE7_ST0BITS);
printf(" ST1 %b ", fdc->status[1], NE7_ST1BITS);
printf(" ST2 %b ", fdc->status[2], NE7_ST2BITS);
printf("cyl %d hd %d sec %d)\n",
fdc->status[3], fdc->status[4], fdc->status[5]);
}
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
bp->b_resid = bp->b_bcount - fdc->fd->skip;
dp->b_actf = bp->av_forw;
fdc->fd->skip = 0;
biodone(bp);
fdc->state = FINDWORK;
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
/* XXX abort current command, if any. */
return(1);
}
fdc->retry++;
return(1);
}
/*
* fdioctl() from jc@irbs.UUCP (John Capo)
* i386/i386/conf.c needs to have fdioctl() declared and remove the line that
* defines fdioctl to be enxio.
*
* TODO: Reformat.
* Think about allocating buffer off stack.
* Don't pass uncast 0's and NULL's to read/write/setdisklabel().
* Watch out for NetBSD's different *disklabel() interface.
*/
int
fdioctl (dev, cmd, addr, flag)
dev_t dev;
int cmd;
caddr_t addr;
int flag;
{
struct fd_type *fdt;
struct disklabel *dl;
char buffer[DEV_BSIZE];
int error;
error = 0;
switch (cmd)
{
case DIOCGDINFO:
bzero(buffer, sizeof (buffer));
dl = (struct disklabel *)buffer;
dl->d_secsize = FDBLK;
fdt = fd_data[FDUNIT(minor(dev))].ft;
dl->d_secpercyl = fdt->size / fdt->tracks;
dl->d_type = DTYPE_FLOPPY;
if (readdisklabel(dev, fdstrategy, dl, NULL, 0, 0) == NULL)
error = 0;
else
error = EINVAL;
*(struct disklabel *)addr = *dl;
break;
case DIOCSDINFO:
if ((flag & FWRITE) == 0)
error = EBADF;
break;
case DIOCWLABEL:
if ((flag & FWRITE) == 0)
error = EBADF;
break;
case DIOCWDINFO:
if ((flag & FWRITE) == 0)
{
error = EBADF;
break;
}
dl = (struct disklabel *)addr;
if (error = setdisklabel ((struct disklabel *)buffer, dl, 0, NULL))
break;
error = writedisklabel(dev, fdstrategy, (struct disklabel *)buffer, NULL);
break;
default:
error = EINVAL;
break;
}
return (error);
}
#endif
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