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freebsd-dev/sys/isa/fd.c
Joerg Wunsch 6b7bd95b6d Fixed the problem where the floppy has incorrectly failed probing 
when the drive had been left on a cylinder > 67 after kernel boot. The
most common case for this is booting a kernel that is located on
the inner cylinders of a floppy.

Also removed all occurences of spinwait(), replaced by DELAY.
Nuked a return line saying nothing, this might make Bruce happy 8^)

Submitted by:	partially by Bruce Evans
1994-09-17 18:08:36 +00:00

1465 lines
36 KiB
C
Raw Blame History

/*-
* 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.
*
* Portions Copyright (c) 1993, 1994 by
* jc@irbs.UUCP (John Capo)
* vak@zebub.msk.su (Serge Vakulenko)
* ache@astral.msk.su (Andrew A. Chernov)
* joerg_wunsch@uriah.sax.de (Joerg Wunsch)
*
* 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 1.30 1994/09/17 16:56:06 davidg Exp $
*
*/
#include "ft.h"
#if NFT < 1
#undef NFDC
#endif
#include "fd.h"
#if NFDC > 0
#include <sys/param.h>
#include <sys/dkbad.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <machine/ioctl_fd.h>
#include <sys/disklabel.h>
#include <sys/buf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/syslog.h>
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/fdreg.h>
#include <i386/isa/fdc.h>
#include <i386/isa/rtc.h>
#define RAW_PART 2
#define b_cylin b_resid
/* misuse a flag to identify format operation */
#define B_FORMAT B_XXX
/*
* this biotab field doubles as a field for the physical unit number
* on the controller
*/
#define id_physid id_scsiid
#define NUMTYPES 14
#define NUMDENS (NUMTYPES - 6)
/* These defines (-1) must match index for fd_types */
#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
#define NO_TYPE 0 /* must match NO_TYPE in ft.c */
#define FD_1720 1
#define FD_1480 2
#define FD_1440 3
#define FD_1200 4
#define FD_820 5
#define FD_800 6
#define FD_720 7
#define FD_360 8
#define FD_1480in5_25 9
#define FD_1440in5_25 10
#define FD_820in5_25 11
#define FD_800in5_25 12
#define FD_720in5_25 13
#define FD_360in5_25 14
struct fd_type fd_types[NUMTYPES] =
{
{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
};
#define DRVS_PER_CTLR 2 /* 2 floppies */
/***********************************************************************\
* Per controller structure. *
\***********************************************************************/
struct fdc_data fdc_data[NFDC];
/***********************************************************************\
* Per drive structure. *
* N per controller (DRVS_PER_CTLR) *
\***********************************************************************/
struct fd_data {
struct fdc_data *fdc; /* pointer to controller structure */
int fdsu; /* this units number on this controller */
int type; /* Drive type (FD_1440...) */
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 */
int options; /* user configurable options, see ioctl_fd.h */
} 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) *
\***********************************************************************/
#if NFT > 0
int ftopen(dev_t, int);
int ftintr(ftu_t ftu);
int ftclose(dev_t, int);
void ftstrategy(struct buf *);
int ftioctl(dev_t, int, caddr_t, int, struct proc *);
int ftdump(dev_t);
int ftsize(dev_t);
int ftattach(struct isa_device *, struct isa_device *);
#endif
/* autoconfig functions */
static int fdprobe(struct isa_device *);
static int fdattach(struct isa_device *);
/* exported functions */
int fdsize (dev_t);
void fdintr(fdcu_t);
int Fdopen(dev_t, int);
int fdclose(dev_t, int);
void fdstrategy(struct buf *);
int fdioctl(dev_t, int, caddr_t, int, struct proc *);
/* needed for ft driver, thus exported */
int in_fdc(fdcu_t);
int out_fdc(fdcu_t, int);
/* internal functions */
static void set_motor(fdcu_t, int, int);
# define TURNON 1
# define TURNOFF 0
static timeout_t fd_turnoff;
static timeout_t fd_motor_on;
static void fd_turnon(fdu_t);
static void fdc_reset(fdc_p);
static void fdstart(fdcu_t);
static timeout_t fd_timeout;
static timeout_t fd_pseudointr;
static int fdstate(fdcu_t, fdc_p);
static int retrier(fdcu_t);
static int fdformat(dev_t, struct fd_formb *, struct proc *);
#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"
};
/* CAUTION: fd_debug causes huge amounts of logging output */
int fd_debug = 0;
#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 */
/****************************************************************************/
/* autoconfiguration stuff */
/****************************************************************************/
struct isa_driver fdcdriver = {
fdprobe, fdattach, "fdc",
};
/*
* probe for existance of controller
*/
static int
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;
/* First - lets reset the floppy controller */
outb(dev->id_iobase+FDOUT, 0);
DELAY(100);
outb(dev->id_iobase+FDOUT, FDO_FRST);
/* see if it can handle a command */
if (out_fdc(fdcu, NE7CMD_SPECIFY) < 0)
{
return(0);
}
out_fdc(fdcu, NE7_SPEC_1(3, 240));
out_fdc(fdcu, NE7_SPEC_2(2, 0));
return (IO_FDCSIZE);
}
/*
* wire controller into system, look for floppy units
*/
static int
fdattach(dev)
struct isa_device *dev;
{
unsigned fdt;
fdu_t fdu;
fdcu_t fdcu = dev->id_unit;
fdc_p fdc = fdc_data + fdcu;
fd_p fd;
int fdsu, st0, i;
struct isa_device *fdup;
fdc->fdcu = fdcu;
fdc->flags |= FDC_ATTACHED;
fdc->dmachan = dev->id_drq;
fdc->state = DEVIDLE;
/* reset controller, turn motor off, clear fdout mirror reg */
outb(fdc->baseport + FDOUT, ((fdc->fdout = 0)));
printf("fdc%d:", fdcu);
/* check for each floppy drive */
for (fdup = isa_biotab_fdc; fdup->id_driver != 0; fdup++) {
if (fdup->id_iobase != dev->id_iobase)
continue;
fdu = fdup->id_unit;
fd = &fd_data[fdu];
if (fdu >= (NFD+NFT))
continue;
fdsu = fdup->id_physid;
/* look up what bios thinks we have */
switch (fdu) {
case 0: fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
break;
case 1: fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
break;
default: fdt = RTCFDT_NONE;
break;
}
/* is there a unit? */
if ((fdt == RTCFDT_NONE)
#if NFT > 0
|| (fdsu >= DRVS_PER_CTLR)) {
#else
) {
fd->type = NO_TYPE;
#endif
#if NFT > 0
/* If BIOS says no floppy, or > 2nd device */
/* Probe for and attach a floppy tape. */
if (ftattach(dev, fdup))
continue;
if (fdsu < DRVS_PER_CTLR)
fd->type = NO_TYPE;
#endif
continue;
}
/* select it */
set_motor(fdcu, fdsu, TURNON);
DELAY(1000000); /* 1 sec */
out_fdc(fdcu, NE7CMD_SENSED);
out_fdc(fdcu, fdsu);
if(in_fdc(fdcu) & NE7_ST3_T0) {
/* if at track 0, first seek inwards */
out_fdc(fdcu, NE7CMD_SEEK); /* seek some steps... */
out_fdc(fdcu, fdsu);
out_fdc(fdcu, 10);
DELAY(300000); /* ...wait a moment... */
out_fdc(fdcu, NE7CMD_SENSEI); /* make ctrlr happy */
(void)in_fdc(fdcu);
(void)in_fdc(fdcu);
}
for(i = 0; i < 2; i++) {
/*
* we must recalibrate twice, just in case the
* heads have been beyond cylinder 76, since most
* FDCs still barf when attempting to recalibrate
* more than 77 steps
*/
out_fdc(fdcu, NE7CMD_RECAL); /* go back to 0 */
out_fdc(fdcu, fdsu);
/* a second being enough for full stroke seek */
DELAY(i == 0? 1000000: 300000);
/* anything responding? */
out_fdc(fdcu, NE7CMD_SENSEI);
st0 = in_fdc(fdcu);
(void)in_fdc(fdcu);
if ((st0 & NE7_ST0_EC) == 0)
break; /* already probed succesfully */
}
set_motor(fdcu, fdsu, TURNOFF);
if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
continue;
fd->track = -2;
fd->fdc = fdc;
fd->fdsu = fdsu;
fd->options = 0;
printf(" [%d: fd%d: ", fdsu, fdu);
switch (fdt) {
case RTCFDT_12M:
printf("1.2MB 5.25in]");
fd->type = FD_1200;
break;
case RTCFDT_144M:
printf("1.44MB 3.5in]");
fd->type = FD_1440;
break;
case RTCFDT_360K:
printf("360KB 5.25in]");
fd->type = FD_360;
break;
case RTCFDT_720K:
printf("720KB 3.5in]");
fd->type = FD_720;
break;
default:
printf("unknown]");
fd->type = NO_TYPE;
break;
}
}
printf("\n");
return (1);
}
int
fdsize(dev)
dev_t dev;
{
return(0);
}
/****************************************************************************/
/* motor control stuff */
/* remember to not deselect the drive we're working on */
/****************************************************************************/
static void
set_motor(fdcu, fdsu, turnon)
fdcu_t fdcu;
int fdsu;
int turnon;
{
int fdout = fdc_data[fdcu].fdout;
int needspecify = 0;
if(turnon) {
fdout &= ~FDO_FDSEL;
fdout |= (FDO_MOEN0 << fdsu) + fdsu;
} else
fdout &= ~(FDO_MOEN0 << fdsu);
if(!turnon
&& (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
/* gonna turn off the last drive, put FDC to bed */
fdout &= ~ (FDO_FRST|FDO_FDMAEN);
else {
/* make sure controller is selected and specified */
if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
needspecify = 1;
fdout |= (FDO_FRST|FDO_FDMAEN);
}
outb(fdc_data[fdcu].baseport+FDOUT, fdout);
fdc_data[fdcu].fdout = fdout;
TRACE1("[0x%x->FDOUT]", fdout);
if(needspecify) {
out_fdc(fdcu, NE7CMD_SPECIFY);
out_fdc(fdcu, NE7_SPEC_1(3, 240));
out_fdc(fdcu, NE7_SPEC_2(2, 0));
}
}
/* ARGSUSED */
static void
fd_turnoff(void *arg1)
{
fdu_t fdu = (fdu_t)arg1;
int s;
fd_p fd = fd_data + fdu;
s = splbio();
fd->flags &= ~FD_MOTOR;
set_motor(fd->fdc->fdcu, fd->fdsu, TURNOFF);
splx(s);
}
/* ARGSUSED */
static void
fd_motor_on(void *arg1)
{
fdu_t fdu = (fdu_t)arg1;
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);
}
static void
fd_turnon(fdu)
fdu_t fdu;
{
fd_p fd = fd_data + fdu;
if(!(fd->flags & FD_MOTOR))
{
fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
set_motor(fd->fdc->fdcu, fd->fdsu, TURNON);
timeout(fd_motor_on, (caddr_t)fdu, hz); /* in 1 sec its ok */
}
}
static void
fdc_reset(fdc)
fdc_p fdc;
{
fdcu_t fdcu = fdc->fdcu;
/* Try a reset, keep motor on */
outb(fdc->baseport + FDOUT, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
DELAY(100);
/* enable FDC, but defer interrupts a moment */
outb(fdc->baseport + FDOUT, fdc->fdout & ~FDO_FDMAEN);
TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
DELAY(100);
outb(fdc->baseport + FDOUT, fdc->fdout);
TRACE1("[0x%x->FDOUT]", fdc->fdout);
out_fdc(fdcu, NE7CMD_SPECIFY);
out_fdc(fdcu, NE7_SPEC_1(3, 240));
out_fdc(fdcu, NE7_SPEC_2(2, 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
}
int
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 */
/****************************************************************************/
int
Fdopen(dev, flags)
dev_t dev;
int flags;
{
fdu_t fdu = FDUNIT(minor(dev));
int type = FDTYPE(minor(dev));
fdc_p fdc;
#if NFT > 0
/* check for a tape open */
if (type & F_TAPE_TYPE)
return(ftopen(dev, flags));
#endif
/* check bounds */
if (fdu >= NFD)
return(ENXIO);
fdc = fd_data[fdu].fdc;
if ((fdc == NULL) || (fd_data[fdu].type == NO_TYPE))
return(ENXIO);
if (type > NUMDENS)
return(ENXIO);
if (type == 0)
type = fd_data[fdu].type;
else {
if (type != fd_data[fdu].type) {
switch (fd_data[fdu].type) {
case FD_360:
return(ENXIO);
case FD_720:
if ( type != FD_820
&& type != FD_800
)
return(ENXIO);
break;
case FD_1200:
switch (type) {
case FD_1480:
type = FD_1480in5_25;
break;
case FD_1440:
type = FD_1440in5_25;
break;
case FD_820:
type = FD_820in5_25;
break;
case FD_800:
type = FD_800in5_25;
break;
case FD_720:
type = FD_720in5_25;
break;
case FD_360:
type = FD_360in5_25;
break;
default:
return(ENXIO);
}
break;
case FD_1440:
if ( type != FD_1720
&& type != FD_1480
&& type != FD_1200
&& type != FD_820
&& type != FD_800
&& type != FD_720
)
return(ENXIO);
break;
}
}
}
fd_data[fdu].ft = fd_types + type - 1;
fd_data[fdu].flags |= FD_OPEN;
return 0;
}
int
fdclose(dev, flags)
dev_t dev;
int flags;
{
fdu_t fdu = FDUNIT(minor(dev));
#if NFT > 0
int type = FDTYPE(minor(dev));
if (type & F_TAPE_TYPE)
return ftclose(dev, flags);
#endif
fd_data[fdu].flags &= ~FD_OPEN;
fd_data[fdu].options &= ~FDOPT_NORETRY;
return(0);
}
/****************************************************************************/
/* fdstrategy */
/****************************************************************************/
void
fdstrategy(struct buf *bp)
{
register struct buf *dp;
long nblocks, blknum;
int s;
fdcu_t fdcu;
fdu_t fdu;
fdc_p fdc;
fd_p fd;
size_t fdblk;
fdu = FDUNIT(minor(bp->b_dev));
fd = &fd_data[fdu];
fdc = fd->fdc;
fdcu = fdc->fdcu;
fdblk = 128 << (fd->ft->secsize);
#if NFT > 0
if (FDTYPE(minor(bp->b_dev)) & F_TAPE_TYPE) {
/* ft tapes do not (yet) support strategy i/o */
bp->b_error = ENXIO;
bp->b_flags |= B_ERROR;
goto bad;
}
/* check for controller already busy with tape */
if (fdc->flags & FDC_TAPE_BUSY) {
bp->b_error = EBUSY;
bp->b_flags |= B_ERROR;
goto bad;
}
#endif
if (!(bp->b_flags & B_FORMAT)) {
if ((fdu >= NFD) || (bp->b_blkno < 0)) {
printf("fdstrat: fdu = %d, blkno = %d, bcount = %d\n",
fdu, bp->b_blkno, bp->b_bcount);
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto bad;
}
if ((bp->b_bcount % fdblk) != 0) {
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, (caddr_t)fdu); /* a good idea */
fdstart(fdcu);
splx(s);
return;
bad:
biodone(bp);
}
/***************************************************************\
* 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 *
\***************************************************************/
static void
fdstart(fdcu)
fdcu_t fdcu;
{
int s;
s = splbio();
if(fdc_data[fdcu].state == DEVIDLE)
{
fdintr(fdcu);
}
splx(s);
}
/* ARGSUSED */
static void
fd_timeout(void *arg1)
{
fdcu_t fdcu = (fdcu_t)arg1;
fdu_t fdu = fdc_data[fdcu].fdu;
int baseport = fdc_data[fdcu].baseport;
struct buf *dp, *bp;
int s;
dp = &fdc_data[fdcu].head;
bp = dp->b_actf;
/*
* Due to IBM's brain-dead design, the FDC has a faked ready
* signal, hardwired to ready == true. Thus, any command
* issued if there's no diskette in the drive will _never_
* complete, and must be aborted by resetting the FDC.
* Many thanks, Big Blue!
*/
s = splbio();
TRACE1("fd%d[fd_timeout()]", fdu);
/* See if the controller is still busy (patiently awaiting data) */
if(((inb(baseport + FDSTS)) & (NE7_CB|NE7_RQM)) == NE7_CB)
{
TRACE1("[FDSTS->0x%x]", inb(baseport + FDSTS));
/* yup, it is; kill it now */
fdc_reset(&fdc_data[fdcu]);
printf("fd%d: Operation timeout\n", fdu);
}
if (bp)
{
retrier(fdcu);
fdc_data[fdcu].status[0] = NE7_ST0_IC_RC;
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 */
/* ARGSUSED */
static void
fd_pseudointr(void *arg1)
{
fdcu_t fdcu = (fdcu_t)arg1;
int s;
s = splbio();
fdintr(fdcu);
splx(s);
}
/***********************************************************************\
* fdintr *
* keep calling the state machine until it returns a 0 *
* ALWAYS called at SPLBIO *
\***********************************************************************/
void
fdintr(fdcu_t fdcu)
{
fdc_p fdc = fdc_data + fdcu;
#if NFT > 0
fdu_t fdu = fdc->fdu;
if (fdc->flags & FDC_TAPE_BUSY)
(ftintr(fdu));
else
#endif
while(fdstate(fdcu, fdc))
;
}
/***********************************************************************\
* The controller state machine. *
* if it returns a non zero value, it should be called again immediatly *
\***********************************************************************/
static int
fdstate(fdcu, fdc)
fdcu_t fdcu;
fdc_p fdc;
{
int read, format, head, sec = 0, i = 0, sectrac, st0, cyl, st3;
unsigned long blknum;
fdu_t fdu = fdc->fdu;
fd_p fd;
register struct buf *dp, *bp;
struct fd_formb *finfo = NULL;
size_t fdblk;
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;
fdblk = 128 << fd->ft->secsize;
if (fdc->fd && (fd != fdc->fd))
{
printf("confused fd pointers\n");
}
read = bp->b_flags & B_READ;
format = bp->b_flags & B_FORMAT;
if(format)
finfo = (struct fd_formb *)bp->b_un.b_addr;
TRACE1("fd%d", fdu);
TRACE1("[%s]", fdstates[fdc->state]);
TRACE1("(0x%x)", fd->flags);
untimeout(fd_turnoff, (caddr_t)fdu);
timeout(fd_turnoff, (caddr_t)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;
outb(fdc->baseport+FDCTL, fd->ft->trans);
TRACE1("[0x%x->FDCTL]", fd->ft->trans);
/*******************************************************\
* 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, TURNON);
}
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, (caddr_t)fdcu, hz / 32);
fdc->state = SEEKCOMPLETE;
return(0); /* will return later */
case SEEKCOMPLETE : /* SEEK DONE, START DMA */
/* Make sure seek really happened*/
if(fd->track == -2)
{
int descyl = bp->b_cylin * fd->ft->steptrac;
do {
out_fdc(fdcu, NE7CMD_SENSEI);
st0 = in_fdc(fdcu);
cyl = in_fdc(fdcu);
/*
* if this was a "ready changed" interrupt,
* fetch status again (can happen after
* enabling controller from reset state)
*/
} while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
if (0 == descyl)
{
/*
* seek to cyl 0 requested; make sure we are
* really there
*/
out_fdc(fdcu, NE7CMD_SENSED);
out_fdc(fdcu, fdu);
st3 = in_fdc(fdcu);
if ((st3 & NE7_ST3_T0) == 0) {
printf(
"fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
fdu, st3, NE7_ST3BITS);
if(fdc->retry < 3)
fdc->retry = 3;
return(retrier(fdcu));
}
}
if (cyl != descyl)
{
printf(
"fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
fdu, descyl, cyl, st0, NE7_ST0BITS);
return(retrier(fdcu));
}
}
fd->track = bp->b_cylin;
if(format)
fd->skip = (char *)&(finfo->fd_formb_cylno(0))
- (char *)finfo;
isa_dmastart(bp->b_flags, bp->b_un.b_addr+fd->skip,
format ? bp->b_bcount : 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;
fd->hddrv = ((head&1)<<2)+fdu;
if(format || !read)
{
/* make sure the drive is writable */
out_fdc(fdcu, NE7CMD_SENSED);
out_fdc(fdcu, fdu);
st3 = in_fdc(fdcu);
if(st3 & NE7_ST3_WP)
{
/*
* XXX YES! this is ugly.
* in order to force the current operation
* to fail, we will have to fake an FDC
* error - all error handling is done
* by the retrier()
*/
fdc->status[0] = NE7_ST0_IC_AT;
fdc->status[1] = NE7_ST1_NW;
fdc->status[2] = 0;
fdc->status[3] = fd->track;
fdc->status[4] = head;
fdc->status[5] = sec;
fdc->retry = 8; /* break out immediately */
fdc->state = IOTIMEDOUT; /* not really... */
return (1);
}
}
if(format)
{
/* formatting */
out_fdc(fdcu, NE7CMD_FORMAT);
out_fdc(fdcu, head << 2 | fdu);
out_fdc(fdcu, finfo->fd_formb_secshift);
out_fdc(fdcu, finfo->fd_formb_nsecs);
out_fdc(fdcu, finfo->fd_formb_gaplen);
out_fdc(fdcu, finfo->fd_formb_fillbyte);
}
else
{
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, (caddr_t)fdcu, hz);
return(0); /* will return later */
case IOCOMPLETE: /* IO DONE, post-analyze */
untimeout(fd_timeout, (caddr_t)fdcu);
for(i=0;i<7;i++)
{
fdc->status[i] = in_fdc(fdcu);
}
fdc->state = IOTIMEDOUT;
/* FALLTHROUGH */
case IOTIMEDOUT:
isa_dmadone(bp->b_flags, bp->b_un.b_addr+fd->skip,
format ? bp->b_bcount : fdblk, fdc->dmachan);
if (fdc->status[0] & NE7_ST0_IC)
{
if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
&& fdc->status[1] & NE7_ST1_OR) {
/*
* DMA overrun. Someone hogged the bus
* and didn't release it in time for the
* next FDC transfer.
* Just restart it, don't increment retry
* count. (vak)
*/
fdc->state = SEEKCOMPLETE;
return (1);
}
else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
&& fdc->retry < 6)
fdc->retry = 6; /* force a reset */
else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
&& fdc->status[2] & NE7_ST2_WC
&& fdc->retry < 3)
fdc->retry = 3; /* force recalibrate */
return(retrier(fdcu));
}
/* All OK */
fd->skip += fdblk;
if (!format && 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->b_actf;
biodone(bp);
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
fdc->state = FINDWORK;
}
return(1);
case RESETCTLR:
fdc_reset(fdc);
fdc->retry++;
fdc->state = STARTRECAL;
break;
case STARTRECAL:
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, (caddr_t)fdcu, hz / 32);
fdc->state = RECALCOMPLETE;
return(0); /* will return later */
case RECALCOMPLETE:
do {
out_fdc(fdcu, NE7CMD_SENSEI);
st0 = in_fdc(fdcu);
cyl = in_fdc(fdcu);
/*
* if this was a "ready changed" interrupt,
* fetch status again (can happen after
* enabling controller from reset state)
*/
} while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
{
printf("fd%d: recal failed ST0 %b cyl %d\n", fdu,
st0, NE7_ST0BITS, cyl);
if(fdc->retry < 3) fdc->retry = 3;
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 */
}
/*
* since the controller was off, it has lost its
* idea about the current track it were; thus,
* recalibrate the bastard
*/
fdc->state = STARTRECAL;
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 = %x, PCN = %x\n", st0, cyl);
out_fdc(fdcu, NE7CMD_READID);
out_fdc(fdcu, fd->fdsu);
for(i=0;i<7;i++) {
fdc->status[i] = in_fdc(fdcu);
}
if(fdc->status[0] != -1)
printf("intr status :%lx %lx %lx %lx %lx %lx %lx\n",
fdc->status[0],
fdc->status[1],
fdc->status[2],
fdc->status[3],
fdc->status[4],
fdc->status[5],
fdc->status[6] );
else
printf("FDC timed out\n");
return(0);
}
return(1); /* Come back immediatly to new state */
}
static int
retrier(fdcu)
fdcu_t fdcu;
{
fdc_p fdc = fdc_data + fdcu;
register struct buf *dp, *bp;
dp = &(fdc->head);
bp = dp->b_actf;
if(fd_data[FDUNIT(minor(bp->b_dev))].options & FDOPT_NORETRY)
goto fail;
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:
fail:
{
dev_t sav_b_dev = bp->b_dev;
/* Trick diskerr */
bp->b_dev = makedev(major(bp->b_dev),
(FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
diskerr(bp, "fd", "hard error", LOG_PRINTF,
fdc->fd->skip / DEV_BSIZE,
(struct disklabel *)NULL);
bp->b_dev = sav_b_dev;
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->b_actf;
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);
}
static int
fdformat(dev, finfo, p)
dev_t dev;
struct fd_formb *finfo;
struct proc *p;
{
fdu_t fdu;
fd_p fd;
struct buf *bp;
int rv = 0, s;
size_t fdblk;
fdu = FDUNIT(minor(dev));
fd = &fd_data[fdu];
fdblk = 128 << fd->ft->secsize;
/* set up a buffer header for fdstrategy() */
bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
if(bp == 0)
return ENOBUFS;
bzero((void *)bp, sizeof(struct buf));
bp->b_flags = B_BUSY | B_PHYS | B_FORMAT;
bp->b_proc = p;
bp->b_dev = dev;
/*
* calculate a fake blkno, so fdstrategy() would initiate a
* seek to the requested cylinder
*/
bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
+ finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
bp->b_un.b_addr = (caddr_t)finfo;
/* now do the format */
fdstrategy(bp);
/* ...and wait for it to complete */
s = splbio();
while(!(bp->b_flags & B_DONE))
{
rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz);
if(rv == EWOULDBLOCK)
break;
}
splx(s);
if(rv == EWOULDBLOCK)
/* timed out */
rv = EIO;
if(bp->b_flags & B_ERROR)
rv = bp->b_error;
biodone(bp);
free(bp, M_TEMP);
return rv;
}
/*
*
* TODO: 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, p)
dev_t dev;
int cmd;
caddr_t addr;
int flag;
struct proc *p;
{
fdu_t fdu = FDUNIT(minor(dev));
fd_p fd = &fd_data[fdu];
size_t fdblk;
struct fd_type *fdt;
struct disklabel *dl;
char buffer[DEV_BSIZE];
int error = 0;
#if NFT > 0
int type = FDTYPE(minor(dev));
/* check for a tape ioctl */
if (type & F_TAPE_TYPE)
return ftioctl(dev, cmd, addr, flag, p);
#endif
fdblk = 128 << fd->ft->secsize;
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;
case FD_FORM:
if((flag & FWRITE) == 0)
error = EBADF; /* must be opened for writing */
else if(((struct fd_formb *)addr)->format_version !=
FD_FORMAT_VERSION)
error = EINVAL; /* wrong version of formatting prog */
else
error = fdformat(dev, (struct fd_formb *)addr, p);
break;
case FD_GTYPE: /* get drive type */
*(struct fd_type *)addr = *fd_data[FDUNIT(minor(dev))].ft;
break;
case FD_STYPE: /* set drive type */
/* this is considered harmful; only allow for superuser */
if(suser(p->p_ucred, &p->p_acflag) != 0)
return EPERM;
*fd_data[FDUNIT(minor(dev))].ft = *(struct fd_type *)addr;
break;
case FD_GOPTS: /* get drive options */
*(int *)addr = fd_data[FDUNIT(minor(dev))].options;
break;
case FD_SOPTS: /* set drive options */
fd_data[FDUNIT(minor(dev))].options = *(int *)addr;
break;
default:
error = ENOTTY;
break;
}
return (error);
}
#endif
/*
* Hello emacs, these are the
* Local Variables:
* c-indent-level: 8
* c-continued-statement-offset: 8
* c-continued-brace-offset: 0
* c-brace-offset: -8
* c-brace-imaginary-offset: 0
* c-argdecl-indent: 8
* c-label-offset: -8
* c++-hanging-braces: 1
* c++-access-specifier-offset: -8
* c++-empty-arglist-indent: 8
* c++-friend-offset: 0
* End:
*/
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