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freebsd-dev/sys/isa/fd.c
rgrimes 732f7813ef Fixed poor timeout code in out_fdc. The timeout counter was not being 
reinitialized between while loops.  Added comments about what was going
on in the out_fdc routine.

out_fdc now returns if the direction bit is not set in time instead of
trying to wait for MRQ to get cleared.
1993-08-12 09:21:20 +00:00

915 lines
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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.
*
* @(#)fd.c 7.4 (Berkeley) 5/25/91
*
* PATCHES MAGIC LEVEL PATCH THAT GOT US HERE
* -------------------- ----- ----------------------
* CURRENT PATCH LEVEL: 1 00153
* -------------------- ----- ----------------------
*
* 20 Apr 93 Julian Elischer Heavily re worked, see notes below
*
* Largely rewritten to handle multiple controllers and drives
* By Julian Elischer, Sun Apr 4 16:34:33 WST 1993
*/
char rev[] = "$Revision: 1.2 $";
/*
* $Header: /freefall/a/cvs/386BSD/src/sys/i386/isa/fd.c,v 1.2 1993/07/15 17:53:04 davidg Exp $
*/
/*
* $Log: fd.c,v $
* Revision 1.2 1993/07/15 17:53:04 davidg
* Modified attach printf's so that the output is compatible with the "new"
* way of doing things. There still remain several drivers that need to
* be updated. Also added a compile-time option to pccons to switch the
* control and caps-lock keys (REVERSE_CAPS_CTRL) - added for my personal
* sanity.
*
* Revision 1.1.1.1 1993/06/12 14:58:02 rgrimes
* Initial import, 0.1 + pk 0.2.4-B1
*
* Revision 1.10 93/04/13 16:53:29 root
* make sure turning off a drive motor doesn't deselect another
* drive active at the time.
* Also added a pointer from the fd_data to it's fd_type.
*
* Revision 1.9 93/04/13 15:31:02 root
* make all seeks go through DOSEEK state so are sure of being done right.
*
* Revision 1.8 93/04/12 21:20:13 root
* only check if old fd is the one we are working on if there IS
* an old fd pointer. (in fdstate())
*
* Revision 1.7 93/04/11 17:05:35 root
* cleanup timeouts etc.
* also fix bug to select teh correct drive when running > 1 drive
* at a time.
*
* Revision 1.6 93/04/05 00:48:45 root
* change a timeout and add version to banner message
*
* Revision 1.5 93/04/04 16:39:08 root
* first working version.. some floppy controllers don't seem to
* like 2 int. status inquiries in a row.
*
*/
#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 "buf.h"
#include "uio.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)
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_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_t fdu)
{
fd_p fd = fd_data + fdu;
fd->flags &= ~FD_MOTOR;
set_motor(fd->fdc->fdcu,fd->fdsu,0);
}
fd_motor_on(fdu_t fdu)
{
fd_p fd = fd_data + fdu;
fd->flags &= ~FD_MOTOR_WAIT;
if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
{
fd_pseudointr(fd->fdc->fdcu);
}
}
fd_turnon(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_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_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_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);
}
static fdopenf;
/****************************************************************************/
/* 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) 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_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_t fdcu)
{
fdu_t fdu = fdc_data[fdcu].fdu;
int st0, st3, cyl;
struct buf *dp,*bp;
dp = &fdc_data[fdcu].head;
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;
}
fd_pseudointr(fdcu);
}
/* just ensure it has the right spl */
fd_pseudointr(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_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_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;
return(0); /* will return later */
case SEEKWAIT:
/* 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_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:
{
printf("fd%d: hard error (ST0 %b ",
fdc->fdu, fdc->status[0], NE7_ST0BITS);
printf(" ST1 %b ", fdc->status[1], NE7_ST1BITS);
printf(" ST2 %b ", fdc->status[2], NE7_ST2BITS);
printf(" ST3 %b ", fdc->status[3], NE7_ST3BITS);
printf("cyl %d hd %d sec %d)\n",
fdc->status[4], fdc->status[5], fdc->status[6]);
}
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;
return(1);
}
fdc->retry++;
return(1);
}
#endif
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