673 lines
16 KiB
C
673 lines
16 KiB
C
/*-
|
|
* 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 "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_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 b_step 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 */
|
|
};
|
|
|
|
struct fd_type fd_types[NUMTYPES] = {
|
|
{ 18,2,0xFF,0x1B,80,2880,1,0 }, /* 1.44 meg HD 3.5in floppy */
|
|
{ 15,2,0xFF,0x1B,80,2400,1,0 }, /* 1.2 meg HD floppy */
|
|
{ 9,2,0xFF,0x23,40,720,2,1 }, /* 360k floppy in 1.2meg drive */
|
|
{ 9,2,0xFF,0x2A,40,720,1,1 }, /* 360k floppy in DD drive */
|
|
};
|
|
|
|
struct fd_u {
|
|
int type; /* Drive type (HD, DD */
|
|
int active; /* Drive activity boolean */
|
|
int motor; /* Motor on flag */
|
|
struct buf head; /* Head of buf chain */
|
|
struct buf rhead; /* Raw head of buf chain */
|
|
int reset;
|
|
} fd_unit[NFD];
|
|
|
|
|
|
struct buf fdtab, fdutab[NFD]; /* controller activity */
|
|
extern int hz;
|
|
|
|
/* state needed for current transfer */
|
|
static fdc; /* floppy disk controller io base register */
|
|
int fd_dmachan;
|
|
static int fd_skip;
|
|
static int fd_state;
|
|
static int fd_retry;
|
|
static int fd_drive;
|
|
static int fd_hddrv;
|
|
static int fd_track = -1;
|
|
static int fd_status[7];
|
|
|
|
/****************************************************************************/
|
|
/* 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;
|
|
{
|
|
fdc = dev->id_iobase;
|
|
|
|
/* see if it can handle a command */
|
|
if (out_fdc(NE7CMD_SPECIFY) < 0) {
|
|
fdc = 0;
|
|
return(0);
|
|
}
|
|
out_fdc(0xDF);
|
|
out_fdc(2);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* wire controller into system, look for floppy units
|
|
*/
|
|
fdattach(dev)
|
|
struct isa_device *dev;
|
|
{
|
|
int i, hdr;
|
|
unsigned fdt,st0, cyl;
|
|
|
|
fd_dmachan = dev->id_drq;
|
|
|
|
fdt = rtcin(RTC_FDISKETTE);
|
|
hdr = 0;
|
|
|
|
/* check for each floppy drive */
|
|
for (i = 0; i < NFD; i++) {
|
|
/* is there a unit? */
|
|
if ((fdt & 0xf0) == RTCFDT_NONE)
|
|
continue;
|
|
|
|
#ifdef notyet
|
|
/* select it */
|
|
fd_turnon(i);
|
|
DELAY(10000);
|
|
out_fdc(NE7CMD_RECAL); /* Recalibrate Function */
|
|
out_fdc(i);
|
|
DELAY(10000);
|
|
|
|
/* anything responding */
|
|
out_fdc(NE7CMD_SENSEI);
|
|
st0 = in_fdc();
|
|
cyl = in_fdc();
|
|
if (st0 & 0xd0)
|
|
continue;
|
|
|
|
#endif
|
|
/* yes, announce it */
|
|
if (!hdr)
|
|
printf(" drives ");
|
|
else
|
|
printf(", ");
|
|
printf("%d: ", i);
|
|
|
|
if ((fdt & 0xf0) == RTCFDT_12M) {
|
|
printf("1.2M");
|
|
fd_unit[i].type = 1;
|
|
}
|
|
if ((fdt & 0xf0) == RTCFDT_144M) {
|
|
printf("1.44M");
|
|
fd_unit[i].type = 0;
|
|
}
|
|
|
|
fdt <<= 4;
|
|
fd_turnoff(i);
|
|
hdr = 1;
|
|
}
|
|
|
|
/* Set transfer to 500kbps */
|
|
outb(fdc+fdctl,0);
|
|
fd_turnoff(0);
|
|
}
|
|
|
|
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 unit, type, s;
|
|
|
|
unit = FDUNIT(minor(bp->b_dev));
|
|
/*type = FDTYPE(minor(bp->b_dev));*/
|
|
type = fd_unit[unit].type;
|
|
|
|
#ifdef FDTEST
|
|
printf("fdstrat%d, blk = %d, bcount = %d, addr = %x|",
|
|
unit, bp->b_blkno, bp->b_bcount,bp->b_un.b_addr);
|
|
#endif
|
|
if ((unit >= NFD) || (bp->b_blkno < 0)) {
|
|
printf("fdstrat: unit = %d, blkno = %d, bcount = %d\n",
|
|
unit, 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_types[type].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_types[type].sectrac * 2);
|
|
dp = &fd_unit[unit].head;
|
|
dp->b_step = (fd_types[fd_unit[unit].type].steptrac);
|
|
s = splbio();
|
|
disksort(dp, bp);
|
|
if (dp->b_active == 0) {
|
|
#ifdef FDDEBUG
|
|
printf("T|");
|
|
#endif
|
|
dp->b_active = 1;
|
|
fd_drive = unit;
|
|
fd_track = -1; /* force seek on first xfer */
|
|
untimeout(fd_turnoff,unit);
|
|
fdstart(unit); /* start drive if idle */
|
|
}
|
|
splx(s);
|
|
return;
|
|
|
|
bad:
|
|
biodone(bp);
|
|
}
|
|
|
|
/****************************************************************************/
|
|
/* motor control stuff */
|
|
/****************************************************************************/
|
|
set_motor(unit,reset)
|
|
int unit,reset;
|
|
{
|
|
int m0,m1;
|
|
m0 = fd_unit[0].motor;
|
|
m1 = fd_unit[1].motor;
|
|
outb(fdc+fdout, (unit&FDO_FDSEL)
|
|
| (reset ? 0 : (FDO_FRST|FDO_FDMAEN))
|
|
| (m0 ? FDO_MOEN0 : 0)
|
|
| (m1 ? FDO_MOEN1 : 0));
|
|
}
|
|
|
|
fd_turnoff(unit)
|
|
int unit;
|
|
{
|
|
fd_unit[unit].motor = 0;
|
|
if (unit) set_motor(0,0);
|
|
else set_motor(1,0);
|
|
}
|
|
|
|
fd_turnon(unit)
|
|
int unit;
|
|
{
|
|
fd_unit[unit].motor = 1;
|
|
set_motor(unit,0);
|
|
}
|
|
|
|
/****************************************************************************/
|
|
/* fdc in/out */
|
|
/****************************************************************************/
|
|
int
|
|
in_fdc()
|
|
{
|
|
int i, j = 100000;
|
|
while ((i = inb(fdc+fdsts) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) && j-- > 0)
|
|
if (i == NE7_RQM) return -1;
|
|
if (j <= 0)
|
|
return(-1);
|
|
return inb(fdc+fddata);
|
|
}
|
|
|
|
out_fdc(x)
|
|
int x;
|
|
{
|
|
int i = 100000;
|
|
|
|
while ((inb(fdc+fdsts) & NE7_DIO) && i-- > 0);
|
|
while ((inb(fdc+fdsts) & NE7_RQM) == 0 && i-- > 0);
|
|
if (i <= 0) return (-1);
|
|
outb(fdc+fddata,x);
|
|
return (0);
|
|
}
|
|
|
|
static fdopenf;
|
|
/****************************************************************************/
|
|
/* fdopen/fdclose */
|
|
/****************************************************************************/
|
|
Fdopen(dev, flags)
|
|
dev_t dev;
|
|
int flags;
|
|
{
|
|
int unit = FDUNIT(minor(dev));
|
|
/*int type = FDTYPE(minor(dev));*/
|
|
int s;
|
|
|
|
fdopenf = 1;
|
|
/* check bounds */
|
|
if (unit >= NFD) return(ENXIO);
|
|
/*if (type >= NUMTYPES) return(ENXIO);*/
|
|
|
|
/* Set proper disk type, only allow one type */
|
|
return 0;
|
|
}
|
|
|
|
fdclose(dev, flags)
|
|
dev_t dev;
|
|
{
|
|
return(0);
|
|
}
|
|
|
|
|
|
/****************************************************************************/
|
|
/* fdstart */
|
|
/****************************************************************************/
|
|
fdstart(unit)
|
|
int unit;
|
|
{
|
|
register struct buf *dp,*bp;
|
|
int s;
|
|
|
|
#ifdef FDTEST
|
|
printf("st%d|",unit);
|
|
#endif
|
|
dp = &fd_unit[unit].head;
|
|
bp = dp->b_actf;
|
|
s = splbio();
|
|
if (!fd_unit[unit].motor) {
|
|
fd_turnon(unit);
|
|
#ifdef notdef
|
|
if ((bp->b_flags & B_READ) == 0) {
|
|
/* Wait for 1 sec */
|
|
#endif
|
|
timeout(fdstart,unit,hz);
|
|
/*}*/
|
|
} else
|
|
{
|
|
/* make sure drive is selected as well as on */
|
|
|
|
fd_retry = 0;
|
|
if (fd_unit[unit].reset) fd_state = 1;
|
|
else {
|
|
/* DO a RESET */
|
|
fd_unit[unit].reset = 1;
|
|
fd_state = 5;
|
|
}
|
|
fd_skip = 0;
|
|
#ifdef FDDEBUG
|
|
printf("Seek %d %d\n", bp->b_cylin, dp->b_step);
|
|
#endif
|
|
if (bp->b_cylin != fd_track) {
|
|
/* Seek necessary, never quite sure where head is at! */
|
|
out_fdc(NE7CMD_SEEK); /* Seek function */
|
|
out_fdc(unit); /* Drive number */
|
|
out_fdc(bp->b_cylin * dp->b_step);
|
|
fd_state = 6;
|
|
} else {
|
|
fd_state = 1;
|
|
fdintr(0xff);
|
|
}
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
fd_timeout(x)
|
|
int x;
|
|
{
|
|
int st0, st3, cyl;
|
|
struct buf *dp,*bp;
|
|
|
|
dp = &fd_unit[fd_drive].head;
|
|
bp = dp->b_actf;
|
|
|
|
out_fdc(NE7CMD_SENSED);
|
|
out_fdc(fd_hddrv);
|
|
st3 = in_fdc();
|
|
|
|
out_fdc(NE7CMD_SENSEI);
|
|
st0 = in_fdc();
|
|
cyl = in_fdc();
|
|
printf("fd%d: Operation timeout ST0 %b cyl %d ST3 %b\n", fd_drive,
|
|
st0, NE7_ST0BITS, cyl, st3, NE7_ST3BITS);
|
|
|
|
if (bp) {
|
|
fd_state = 4;
|
|
fdintr(fd_drive);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************/
|
|
/* fdintr */
|
|
/****************************************************************************/
|
|
fdintr(unit)
|
|
{
|
|
register struct buf *dp,*bp;
|
|
struct buf *dpother;
|
|
int read,head,trac,sec,i,s,sectrac,cyl,st0;
|
|
unsigned long blknum;
|
|
struct fd_type *ft;
|
|
|
|
#ifdef FDTEST
|
|
printf("state %d, unit %d, dr %d|",fd_state,unit,fd_drive);
|
|
#endif
|
|
|
|
if (!fdopenf) return;
|
|
dp = &fd_unit[fd_drive].head;
|
|
bp = dp->b_actf;
|
|
read = bp->b_flags & B_READ;
|
|
/*ft = &fd_types[FDTYPE(bp->b_dev)];*/
|
|
ft = &fd_types[fd_unit[fd_drive].type];
|
|
|
|
switch (fd_state) {
|
|
case 1 : /* SEEK DONE, START DMA */
|
|
/* Make sure seek really happened*/
|
|
if (unit != 0xff) {
|
|
int descyl = bp->b_cylin * dp->b_step;
|
|
out_fdc(NE7CMD_SENSEI);
|
|
i = in_fdc();
|
|
cyl = in_fdc();
|
|
if (cyl != descyl) {
|
|
printf("fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = %b)\n", fd_drive,
|
|
descyl, cyl, i, NE7_ST0BITS);
|
|
fd_state = 4;
|
|
return;
|
|
}
|
|
}
|
|
|
|
fd_track = bp->b_cylin;
|
|
isa_dmastart(bp->b_flags, bp->b_un.b_addr+fd_skip,
|
|
FDBLK, fd_dmachan);
|
|
blknum = (unsigned long)bp->b_blkno*DEV_BSIZE/FDBLK
|
|
+ fd_skip/FDBLK;
|
|
sectrac = ft->sectrac;
|
|
sec = blknum % (sectrac * 2);
|
|
head = sec / sectrac;
|
|
sec = sec % sectrac + 1;
|
|
fd_hddrv = ((head&1)<<2)+fd_drive;
|
|
|
|
if (read) out_fdc(NE7CMD_READ); /* READ */
|
|
else out_fdc(NE7CMD_WRITE); /* WRITE */
|
|
out_fdc(head << 2 | fd_drive); /* head & unit */
|
|
out_fdc(fd_track); /* track */
|
|
out_fdc(head);
|
|
out_fdc(sec); /* sector XXX +1? */
|
|
out_fdc(ft->secsize); /* sector size */
|
|
out_fdc(sectrac); /* sectors/track */
|
|
out_fdc(ft->gap); /* gap size */
|
|
out_fdc(ft->datalen); /* data length */
|
|
fd_state = 2;
|
|
break;
|
|
case 2 : /* IO DONE, post-analyze */
|
|
untimeout(fd_timeout,2);
|
|
for(i=0;i<7;i++) {
|
|
fd_status[i] = in_fdc();
|
|
}
|
|
if (fd_status[0]&0xF8) {
|
|
#ifdef FDOTHER
|
|
printf("status0 err %d:",fd_status[0]);
|
|
#endif
|
|
goto retry;
|
|
}
|
|
/* All OK */
|
|
isa_dmadone(bp->b_flags, bp->b_un.b_addr+fd_skip,
|
|
FDBLK, fd_dmachan);
|
|
fd_skip += FDBLK;
|
|
if (fd_skip >= bp->b_bcount) {
|
|
#ifdef FDTEST
|
|
printf("DONE %d|", bp->b_blkno);
|
|
#endif
|
|
/* ALL DONE */
|
|
fd_skip = 0;
|
|
bp->b_resid = 0;
|
|
dp->b_actf = bp->av_forw;
|
|
biodone(bp);
|
|
nextstate(dp);
|
|
|
|
} else {
|
|
#ifdef FDDEBUG
|
|
printf("next|");
|
|
#endif
|
|
/* set up next transfer */
|
|
blknum = (unsigned long)bp->b_blkno*DEV_BSIZE/FDBLK
|
|
+ fd_skip/FDBLK;
|
|
fd_state = 1;
|
|
bp->b_cylin = (blknum / (ft->sectrac * 2));
|
|
if (bp->b_cylin != fd_track) {
|
|
#ifdef FDTEST
|
|
printf("Seek|");
|
|
#endif
|
|
/* SEEK Necessary */
|
|
out_fdc(NE7CMD_SEEK); /* Seek function */
|
|
out_fdc(fd_drive);/* Drive number */
|
|
out_fdc(bp->b_cylin * dp->b_step);
|
|
fd_state = 6;
|
|
break;
|
|
} else fdintr(0xff);
|
|
}
|
|
break;
|
|
case 3:
|
|
out_fdc(NE7CMD_SENSEI);
|
|
st0 = in_fdc();
|
|
cyl = in_fdc();
|
|
if (cyl != 0)
|
|
printf("fd%d: recal failed ST0 %b cyl %d\n", fd_drive,
|
|
st0, NE7_ST0BITS, cyl);
|
|
|
|
/* Seek necessary */
|
|
out_fdc(NE7CMD_SEEK); /* Seek function */
|
|
out_fdc(fd_drive);/* Drive number */
|
|
out_fdc(bp->b_cylin * dp->b_step);
|
|
fd_state = 6;
|
|
break;
|
|
case 4:
|
|
out_fdc(NE7CMD_SPECIFY); /* specify command */
|
|
out_fdc(0xDF);
|
|
out_fdc(2);
|
|
out_fdc(NE7CMD_RECAL); /* Recalibrate Function */
|
|
out_fdc(fd_drive);
|
|
fd_state = 7;
|
|
break;
|
|
case 5:
|
|
#ifdef FDOTHER
|
|
printf("**RESET**\n");
|
|
#endif
|
|
/* Try a reset, keep motor on */
|
|
set_motor(fd_drive,1);
|
|
DELAY(100);
|
|
set_motor(fd_drive,0);
|
|
outb(fdc+fdctl,ft->trans);
|
|
fd_retry++;
|
|
fd_state = 4;
|
|
break;
|
|
case 6:
|
|
/* allow heads to settle */
|
|
timeout(fdintr,fd_drive,hz/30);
|
|
fd_state = 1;
|
|
return;
|
|
break;
|
|
|
|
case 7:
|
|
/* allow heads to settle */
|
|
timeout(fdintr,fd_drive,hz/3);
|
|
fd_state = 3;
|
|
return;
|
|
break;
|
|
|
|
default:
|
|
printf("Unexpected FD int->");
|
|
out_fdc(NE7CMD_SENSEI);
|
|
st0 = in_fdc();
|
|
cyl = in_fdc();
|
|
printf("ST0 = %lx, PCN = %lx\n",i,sec);
|
|
out_fdc(0x4A);
|
|
out_fdc(fd_drive);
|
|
for(i=0;i<7;i++) {
|
|
fd_status[i] = in_fdc();
|
|
}
|
|
printf("intr status :%lx %lx %lx %lx %lx %lx %lx ",
|
|
fd_status[0], fd_status[1], fd_status[2], fd_status[3],
|
|
fd_status[4], fd_status[5], fd_status[6] );
|
|
break;
|
|
}
|
|
return;
|
|
retry:
|
|
switch(fd_retry) {
|
|
case 0: case 1:
|
|
case 2:
|
|
break;
|
|
case 3:
|
|
case 4:
|
|
case 5:
|
|
fd_retry++;
|
|
fd_state = 4;
|
|
fdintr(0xff);
|
|
return;
|
|
case 6:
|
|
fd_retry++;
|
|
fd_state = 5;
|
|
fdintr(0xff);
|
|
return;
|
|
case 7:
|
|
break;
|
|
default:
|
|
/*printf("fd%d: hard error (ST0 %b ST1 %b ST2 %b ST3 %b cyl %d hd %d sec %d)\n",
|
|
fd_drive, fd_status[0], NE7_ST0BITS, fd_status[1], NE7_ST1BITS,
|
|
fd_status[2], NE7_ST2BITS, fd_status[3], NE7_ST3BITS,
|
|
fd_status[4], fd_status[5], fd_status[6]);*/
|
|
printf("fd%d: hard error (ST0 %b ", fd_drive, fd_status[0], NE7_ST0BITS);
|
|
printf(" ST1 %b ", fd_status[1], NE7_ST1BITS);
|
|
printf(" ST2 %b ", fd_status[2], NE7_ST2BITS);
|
|
printf(" ST3 %b ", fd_status[3], NE7_ST3BITS);
|
|
printf("cyl %d hd %d sec %d)\n", fd_status[4], fd_status[5], fd_status[6]);
|
|
badtrans(dp,bp);
|
|
return;
|
|
}
|
|
fd_state = 1;
|
|
fd_retry++;
|
|
fdintr(0xff);
|
|
}
|
|
|
|
badtrans(dp,bp)
|
|
struct buf *dp,*bp;
|
|
{
|
|
|
|
bp->b_flags |= B_ERROR;
|
|
bp->b_error = EIO;
|
|
bp->b_resid = bp->b_bcount - fd_skip;
|
|
dp->b_actf = bp->av_forw;
|
|
fd_skip = 0;
|
|
biodone(bp);
|
|
nextstate(dp);
|
|
|
|
}
|
|
|
|
/*
|
|
nextstate : After a transfer is done, continue processing
|
|
requests on the current drive queue. If empty, go to
|
|
the other drives queue. If that is empty too, timeout
|
|
to turn off the current drive in 5 seconds, and go
|
|
to state 0 (not expecting any interrupts).
|
|
*/
|
|
|
|
nextstate(dp)
|
|
struct buf *dp;
|
|
{
|
|
struct buf *dpother;
|
|
|
|
if (dp->b_actf) fdstart(fd_drive);
|
|
else {
|
|
untimeout(fd_turnoff,fd_drive);
|
|
timeout(fd_turnoff,fd_drive,hz);
|
|
fd_state = 0;
|
|
dp->b_active = 0;
|
|
}
|
|
}
|
|
#endif
|