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freebsd-dev/sys/dev/fdc/fdc.c
Bruce Evans 5c1a1eae83 Fixed error handling: 
- Call isa_dmadone() whenever necessary to stop DMA and/or free bounce
  buffers.  Undead DMA corrupted the malloc freelist fairly consistently
  in the following configuration: SLICE kernel, 2 floppy drives, no disk
  in fd0, disk in fd1.
- Don't call fdc_reset() from fd_timeout().  Doing so gave an "extra"
  interrupt which was usually misinterpreted as being for completion
  of the next FDC command; the interrupt for completion of the next
  FDC command was then usually misinterpreted...  There were further
  complications for interrupts latched by the soft-spl mechanism so
  that they were delivered after all the h/w interrupts went away.
  This caused at least wrong head settle delays and may be why the
  FreeBSD floppy driver seems to munch floppies more than most floppy
  drivers.  The reset was unnecessary anyway in cases that didn't have
  the bug described next, since is was repeated a little later for
  the IOTIMEDOUT state.  The state machine has complications to handle
  resets correctly, so just use it.
- Don't call retrier() from fd_timeout().  The IOTIMEDOUT state needs
  to be processed next, and it isn't valid to set to that state if
  retrier() has aborted the current transfer.  Doing so caused null
  pointer panics after the previous bug was fixed.

Improved error handling:
- If an i/o is aborted, arrange to reset in the state machine before
  doing the next i/o.  New fdc flag for this.  This fixes spurious
  warnings and lengthy busy-waiting for the next i/o.
- Split STARTRECAL into RESETCOMPLETE and STARTRECAL and only check
  for the results from reset if we actually reset.  This fixes spurious
  warnings for other paths to STARTRECAL.  [Oops, it may break reset
  handling for motor-off resets.]

Cleanups in fd_timeout():
- Renamed to fd_iotimeout() to make it clearer that it is only used
  for i/o.
- Don't handle the bp == 0 case.  This case can't happen for i/o.
- Don't check for controller-busy.  We know it must be.
- Don't print anything.  retrier() already prints too much for normal
  errors.
- Fudge the state differently so that the state machine advances
  fdc->retry and the status is invalid (perhaps this should fudge a
  valid state like the one for WP).
- Style fixes.
1998-07-29 13:00:42 +00:00

2261 lines
54 KiB
C
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/*
* 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.
*
* Copyright (c) 1993, 1994 by
* jc@irbs.UUCP (John Capo)
* vak@zebub.msk.su (Serge Vakulenko)
* ache@astral.msk.su (Andrew A. Chernov)
*
* Copyright (c) 1993, 1994, 1995 by
* joerg_wunsch@uriah.sax.de (Joerg Wunsch)
* dufault@hda.com (Peter Dufault)
*
* 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 1.119 1998/07/18 03:15:33 bde Exp $
*
*/
#include "ft.h"
#if NFT < 1
#undef NFDC
#endif
#include "fd.h"
#include "opt_devfs.h"
#include "opt_fdc.h"
#if NFDC > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <machine/clock.h>
#include <machine/ioctl_fd.h>
#include <sys/disklabel.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/syslog.h>
#ifdef notyet
#include <sys/dkstat.h>
#endif
#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>
#include <machine/stdarg.h>
#if NFT > 0
#include <sys/ftape.h>
#include <i386/isa/ftreg.h>
#endif
#ifdef DEVFS
#include <sys/devfsext.h>
#ifdef SLICE
#include <sys/device.h>
#include <dev/slice/slice.h>
#endif /* SLICE */
#endif /* DEVFS */
/* misuse a flag to identify format operation */
#define B_FORMAT B_XXX
/* configuration flags */
#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
/* internally used only, not really from CMOS: */
#define RTCFDT_144M_PRETENDED 0x1000
/*
* this biotab field doubles as a field for the physical unit number
* on the controller
*/
#define id_physid id_scsiid
/* error returns for fd_cmd() */
#define FD_FAILED -1
#define FD_NOT_VALID -2
#define FDC_ERRMAX 100 /* do not log more */
#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
static 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) *
\***********************************************************************/
static 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;
#define FD_NO_TRACK -2
int track; /* where we think the head is */
int options; /* user configurable options, see ioctl_fd.h */
#ifdef notyet
int dkunit; /* disk stats unit number */
#endif
struct callout_handle toffhandle;
struct callout_handle tohandle;
#ifdef DEVFS
#ifdef SLICE
int unit; /* as in fd0 */
void *bdevs[MAXPARTITIONS];
void *cdevs[MAXPARTITIONS];
struct subdev{
struct slice *slice;
int minor;
struct fd_data *drive;
struct slicelimits limit;
}subdevs[16];
struct intr_config_hook ich;
#else /* SLICE */
void *bdevs[1 + NUMDENS + MAXPARTITIONS];
void *cdevs[1 + NUMDENS + MAXPARTITIONS];
#endif /* SLICE */
#endif
} 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, unsigned long, caddr_t, int, struct proc *);
int ftdump(dev_t);
int ftsize(dev_t);
int ftattach(struct isa_device *, struct isa_device *, int);
#endif
/* autoconfig functions */
static int fdprobe(struct isa_device *);
static int fdattach(struct isa_device *);
/* 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 int fd_in(fdcu_t, int *);
static void fdstart(fdcu_t);
static timeout_t fd_iotimeout;
static timeout_t fd_pseudointr;
static int fdstate(fdcu_t, fdc_p);
static int retrier(fdcu_t);
#ifndef SLICE
static int fdformat(dev_t, struct fd_formb *, struct proc *);
#endif
static int enable_fifo(fdc_p fdc);
static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
#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
#define RESETCOMPLETE 12
#ifdef FDC_DEBUG
static char const * const fdstates[] =
{
"DEVIDLE",
"FINDWORK",
"DOSEEK",
"SEEKCOMPLETE",
"IOCOMPLETE",
"RECALCOMPLETE",
"STARTRECAL",
"RESETCTLR",
"SEEKWAIT",
"RECALWAIT",
"MOTORWAIT",
"IOTIMEDOUT",
"RESETCOMPLETE",
};
/* CAUTION: fd_debug causes huge amounts of logging output */
static int volatile fd_debug = 0;
#define TRACE0(arg) if(fd_debug) printf(arg)
#define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
#else /* FDC_DEBUG */
#define TRACE0(arg)
#define TRACE1(arg1, arg2)
#endif /* FDC_DEBUG */
/* autoconfig structure */
struct isa_driver fdcdriver = {
fdprobe, fdattach, "fdc",
};
static d_open_t Fdopen; /* NOTE, not fdopen */
static d_read_t fdread;
static d_write_t fdwrite;
static d_close_t fdclose;
static d_ioctl_t fdioctl;
static d_strategy_t fdstrategy;
/* even if SLICE defined, these are needed for the ft support. */
#define CDEV_MAJOR 9
#define BDEV_MAJOR 2
static struct cdevsw fd_cdevsw = {
Fdopen, fdclose, fdread, fdwrite,
fdioctl, nostop, nullreset, nodevtotty,
seltrue, nommap, fdstrategy, "fd",
NULL, -1, nodump, nopsize,
D_DISK, 0, -1 };
static struct isa_device *fdcdevs[NFDC];
#ifdef SLICE
static sl_h_IO_req_t fdsIOreq; /* IO req downward (to device) */
static sl_h_ioctl_t fdsioctl; /* ioctl req downward (to device) */
static sl_h_open_t fdsopen; /* downwards travelling open */
/*static sl_h_close_t fdsclose; */ /* downwards travelling close */
static void fdsinit(void *);
static struct slice_handler slicetype = {
"floppy",
0,
NULL,
0,
NULL, /* constructor */
&fdsIOreq,
&fdsioctl,
&fdsopen,
/*&fdsclose*/NULL,
NULL, /* revoke */
NULL, /* claim */
NULL, /* verify */
NULL, /* upconfig */
NULL /* dump */
};
#endif /* SLICE */
static int
fdc_err(fdcu_t fdcu, const char *s)
{
fdc_data[fdcu].fdc_errs++;
if(s) {
if(fdc_data[fdcu].fdc_errs < FDC_ERRMAX)
printf("fdc%d: %s", fdcu, s);
else if(fdc_data[fdcu].fdc_errs == FDC_ERRMAX)
printf("fdc%d: too many errors, not logging any more\n",
fdcu);
}
return FD_FAILED;
}
/*
* fd_cmd: Send a command to the chip. Takes a varargs with this structure:
* Unit number,
* # of output bytes, output bytes as ints ...,
* # of input bytes, input bytes as ints ...
*/
static int
fd_cmd(fdcu_t fdcu, int n_out, ...)
{
u_char cmd;
int n_in;
int n;
va_list ap;
va_start(ap, n_out);
cmd = (u_char)(va_arg(ap, int));
va_end(ap);
va_start(ap, n_out);
for (n = 0; n < n_out; n++)
{
if (out_fdc(fdcu, va_arg(ap, int)) < 0)
{
char msg[50];
sprintf(msg,
"cmd %x failed at out byte %d of %d\n",
cmd, n + 1, n_out);
return fdc_err(fdcu, msg);
}
}
n_in = va_arg(ap, int);
for (n = 0; n < n_in; n++)
{
int *ptr = va_arg(ap, int *);
if (fd_in(fdcu, ptr) < 0)
{
char msg[50];
sprintf(msg,
"cmd %02x failed at in byte %d of %d\n",
cmd, n + 1, n_in);
return fdc_err(fdcu, msg);
}
}
return 0;
}
static int
enable_fifo(fdc_p fdc)
{
int i, j;
if ((fdc->flags & FDC_HAS_FIFO) == 0) {
/*
* XXX:
* Cannot use fd_cmd the normal way here, since
* this might be an invalid command. Thus we send the
* first byte, and check for an early turn of data directon.
*/
if (out_fdc(fdc->fdcu, I8207X_CONFIGURE) < 0)
return fdc_err(fdc->fdcu, "Enable FIFO failed\n");
/* If command is invalid, return */
j = 100000;
while ((i = inb(fdc->baseport + FDSTS) & (NE7_DIO | NE7_RQM))
!= NE7_RQM && j-- > 0)
if (i == (NE7_DIO | NE7_RQM)) {
fdc_reset(fdc);
return FD_FAILED;
}
if (j<0 ||
fd_cmd(fdc->fdcu, 3,
0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
fdc_reset(fdc);
return fdc_err(fdc->fdcu, "Enable FIFO failed\n");
}
fdc->flags |= FDC_HAS_FIFO;
return 0;
}
if (fd_cmd(fdc->fdcu, 4,
I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
return fdc_err(fdc->fdcu, "Re-enable FIFO failed\n");
return 0;
}
static int
fd_sense_drive_status(fdc_p fdc, int *st3p)
{
int st3;
if (fd_cmd(fdc->fdcu, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
{
return fdc_err(fdc->fdcu, "Sense Drive Status failed\n");
}
if (st3p)
*st3p = st3;
return 0;
}
static int
fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
{
int st0, cyl;
int ret = fd_cmd(fdc->fdcu, 1, NE7CMD_SENSEI, 1, &st0);
if (ret)
{
(void)fdc_err(fdc->fdcu,
"sense intr err reading stat reg 0\n");
return ret;
}
if (st0p)
*st0p = st0;
if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV)
{
/*
* There doesn't seem to have been an interrupt.
*/
return FD_NOT_VALID;
}
if (fd_in(fdc->fdcu, &cyl) < 0)
{
return fdc_err(fdc->fdcu, "can't get cyl num\n");
}
if (cylp)
*cylp = cyl;
return 0;
}
static int
fd_read_status(fdc_p fdc, int fdsu)
{
int i, ret;
for (i = 0; i < 7; i++)
{
/*
* XXX types are poorly chosen. Only bytes can by read
* from the hardware, but fdc->status[] wants u_ints and
* fd_in() gives ints.
*/
int status;
ret = fd_in(fdc->fdcu, &status);
fdc->status[i] = status;
if (ret != 0)
break;
}
if (ret == 0)
fdc->flags |= FDC_STAT_VALID;
else
fdc->flags &= ~FDC_STAT_VALID;
return ret;
}
/****************************************************************************/
/* autoconfiguration stuff */
/****************************************************************************/
/*
* probe for existance of controller
*/
static int
fdprobe(struct isa_device *dev)
{
fdcu_t fdcu = dev->id_unit;
if(fdc_data[fdcu].flags & FDC_ATTACHED)
{
printf("fdc%d: unit used multiple times\n", fdcu);
return 0;
}
fdcdevs[fdcu] = dev;
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 (fd_cmd(fdcu,
3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
0))
{
return(0);
}
return (IO_FDCSIZE);
}
/*
* wire controller into system, look for floppy units
*/
static int
fdattach(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, st3, i;
#if NFT > 0
int unithasfd;
#endif
struct isa_device *fdup;
int ic_type = 0;
#ifdef DEVFS
#ifdef SLICE
char namebuf[64];
#else
int mynor;
int typemynor;
#endif /* SLICE */
int typesize;
#endif
fdc->fdcu = fdcu;
fdc->flags |= FDC_ATTACHED;
fdc->dmachan = dev->id_drq;
/* Acquire the DMA channel forever, The driver will do the rest */
isa_dma_acquire(fdc->dmachan);
isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
fdc->state = DEVIDLE;
/* reset controller, turn motor off, clear fdout mirror reg */
outb(fdc->baseport + FDOUT, ((fdc->fdout = 0)));
bufq_init(&fdc->head);
/* 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: if (dev->id_flags & FDC_PRETEND_D0)
fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
else
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. */
/* Tell FT if there was already a disk */
/* with this unit number found. */
unithasfd = 0;
if (fdu < NFD && fd->type != NO_TYPE)
unithasfd = 1;
if (ftattach(dev, fdup, unithasfd))
continue;
if (fdsu < DRVS_PER_CTLR)
fd->type = NO_TYPE;
#endif
continue;
}
/* select it */
set_motor(fdcu, fdsu, TURNON);
DELAY(1000000); /* 1 sec */
if (ic_type == 0 &&
fd_cmd(fdcu, 1, NE7CMD_VERSION, 1, &ic_type) == 0)
{
#ifdef FDC_PRINT_BOGUS_CHIPTYPE
printf("fdc%d: ", fdcu);
#endif
ic_type = (u_char)ic_type;
switch( ic_type ) {
case 0x80:
#ifdef FDC_PRINT_BOGUS_CHIPTYPE
printf("NEC 765\n");
#endif
fdc->fdct = FDC_NE765;
break;
case 0x81:
#ifdef FDC_PRINT_BOGUS_CHIPTYPE
printf("Intel 82077\n");
#endif
fdc->fdct = FDC_I82077;
break;
case 0x90:
#ifdef FDC_PRINT_BOGUS_CHIPTYPE
printf("NEC 72065B\n");
#endif
fdc->fdct = FDC_NE72065;
break;
default:
#ifdef FDC_PRINT_BOGUS_CHIPTYPE
printf("unknown IC type %02x\n", ic_type);
#endif
fdc->fdct = FDC_UNKNOWN;
break;
}
if (fdc->fdct != FDC_NE765 &&
fdc->fdct != FDC_UNKNOWN &&
enable_fifo(fdc) == 0) {
printf("fdc%d: FIFO enabled", fdcu);
printf(", %d bytes threshold\n",
fifo_threshold);
}
}
if ((fd_cmd(fdcu, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) &&
(st3 & NE7_ST3_T0)) {
/* if at track 0, first seek inwards */
/* seek some steps: */
(void)fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0);
DELAY(300000); /* ...wait a moment... */
(void)fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
}
/* If we're at track 0 first seek inwards. */
if ((fd_sense_drive_status(fdc, &st3) == 0) &&
(st3 & NE7_ST3_T0)) {
/* Seek some steps... */
if (fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
/* ...wait a moment... */
DELAY(300000);
/* make ctrlr happy: */
(void)fd_sense_int(fdc, 0, 0);
}
}
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
*/
/* go back to 0: */
if (fd_cmd(fdcu, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
/* a second being enough for full stroke seek*/
DELAY(i == 0? 1000000: 300000);
/* anything responding? */
if (fd_sense_int(fdc, &st0, 0) == 0 &&
(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 = FD_NO_TRACK;
#ifdef SLICE
fd->unit = fdu;
#endif
fd->fdc = fdc;
fd->fdsu = fdsu;
fd->options = 0;
callout_handle_init(&fd->toffhandle);
callout_handle_init(&fd->tohandle);
printf("fd%d: ", fdu);
switch (fdt) {
case RTCFDT_12M:
printf("1.2MB 5.25in\n");
fd->type = FD_1200;
break;
case RTCFDT_144M | RTCFDT_144M_PRETENDED:
printf("config-pretended ");
fdt = RTCFDT_144M;
/* fallthrough */
case RTCFDT_144M:
printf("1.44MB 3.5in\n");
fd->type = FD_1440;
break;
case RTCFDT_288M:
case RTCFDT_288M_1:
printf("2.88MB 3.5in - 1.44MB mode\n");
fd->type = FD_1440;
break;
case RTCFDT_360K:
printf("360KB 5.25in\n");
fd->type = FD_360;
break;
case RTCFDT_720K:
printf("720KB 3.5in\n");
fd->type = FD_720;
break;
default:
printf("unknown\n");
fd->type = NO_TYPE;
continue;
}
#ifdef DEVFS
#ifdef SLICE
sprintf(namebuf,"fd%d",fdu);
fd->subdevs[0].minor = 0;
fd->subdevs[0].drive = fd;
fd->subdevs[0].limit.blksize =
128 << (fd_types[fd->type - 1].secsize);
fd->subdevs[0].limit.slicesize =
fd_types[fd->type - 1].size
* fd->subdevs[0].limit.blksize;
fd->ft = fd_types + (fd->type - 1); /* default value */
sl_make_slice(&slicetype,
&fd->subdevs[0],
&fd->subdevs[0].limit,
&fd->subdevs[0].slice,
namebuf);
/* Allow full probing */
fd->subdevs[0].slice->probeinfo.typespecific = NULL;
fd->subdevs[0].slice->probeinfo.type = NULL;
fd->ich.ich_func = fdsinit;
fd->ich.ich_arg = &fd->subdevs[0];
config_intrhook_establish(&fd->ich);
#else /* SLICE */
mynor = fdu << 6;
fd->bdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_BLK,
UID_ROOT, GID_OPERATOR, 0640,
"fd%d", fdu);
fd->cdevs[0] = devfs_add_devswf(&fd_cdevsw, mynor, DV_CHR,
UID_ROOT, GID_OPERATOR, 0640,
"rfd%d", fdu);
#endif /* SLICE */
for (i = 1; i < 1 + NUMDENS; i++) {
/*
* XXX this and the lookup in Fdopen() should be
* data driven.
*/
switch (fd->type) {
case FD_360:
if (i != FD_360)
continue;
break;
case FD_720:
if (i != FD_720 && i != FD_800 && i != FD_820)
continue;
break;
case FD_1200:
if (i != FD_360 && i != FD_720 && i != FD_800
&& i != FD_820 && i != FD_1200
&& i != FD_1440 && i != FD_1480)
continue;
break;
case FD_1440:
if (i != FD_720 && i != FD_800 && i != FD_820
&& i != FD_1200 && i != FD_1440
&& i != FD_1480 && i != FD_1720)
continue;
break;
}
typesize = fd_types[i - 1].size / 2;
/*
* XXX all these conversions give bloated code and
* confusing names.
*/
if (typesize == 1476)
typesize = 1480;
if (typesize == 1722)
typesize = 1720;
#ifdef SLICE
sprintf(namebuf,"fd%d.%d",fdu,typesize);
fd->subdevs[i].minor = i;
fd->subdevs[i].drive = fd;
fd->subdevs[i].limit.blksize =
128 << (fd_types[i - 1].secsize);
fd->subdevs[i].limit.slicesize =
fd_types[i - 1].size
* fd->subdevs[i].limit.blksize;
sl_make_slice(&slicetype,
&fd->subdevs[i],
&fd->subdevs[i].limit,
&fd->subdevs[i].slice,
namebuf);
/* Allow full probing */
fd->subdevs[i].slice->probeinfo.typespecific = NULL;
fd->subdevs[i].slice->probeinfo.type = NO_SUBPART;
}
#else /* SLICE */
typemynor = mynor | i;
fd->bdevs[i] =
devfs_add_devswf(&fd_cdevsw, typemynor, DV_BLK,
UID_ROOT, GID_OPERATOR, 0640,
"fd%d.%d", fdu, typesize);
fd->cdevs[i] =
devfs_add_devswf(&fd_cdevsw, typemynor, DV_CHR,
UID_ROOT, GID_OPERATOR, 0640,
"rfd%d.%d", fdu, typesize);
}
for (i = 0; i < MAXPARTITIONS; i++) {
fd->bdevs[1 + NUMDENS + i] = devfs_link(fd->bdevs[0],
"fd%d%c", fdu, 'a' + i);
fd->cdevs[1 + NUMDENS + i] =
devfs_link(fd->cdevs[0],
"rfd%d%c", fdu, 'a' + i);
}
#endif /* SLICE */
#endif /* DEVFS */
#ifdef notyet
if (dk_ndrive < DK_NDRIVE) {
sprintf(dk_names[dk_ndrive], "fd%d", fdu);
fd->dkunit = dk_ndrive++;
/*
* XXX assume rate is FDC_500KBPS.
*/
dk_wpms[dk_ndrive] = 500000 / 8 / 2;
} else {
fd->dkunit = -1;
}
#endif
}
return (1);
}
#ifdef SLICE
static void
fdsinit(void *arg)
{
struct subdev *sd = arg;
sh_p tp;
slice_start_probe(sd->slice);
config_intrhook_disestablish(&sd->drive->ich);
DELAY(2000000); /* XXX */
}
#endif /* SLICE */
/****************************************************************************/
/* motor control stuff */
/* remember to not deselect the drive we're working on */
/****************************************************************************/
static void
set_motor(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) {
/*
* XXX
* special case: since we have just woken up the FDC
* from its sleep, we silently assume the command will
* be accepted, and do not test for a timeout
*/
(void)fd_cmd(fdcu, 3, NE7CMD_SPECIFY,
NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
0);
if (fdc_data[fdcu].flags & FDC_HAS_FIFO)
(void) enable_fifo(&fdc_data[fdcu]);
}
}
static void
fd_turnoff(void *arg1)
{
fdu_t fdu = (fdu_t)arg1;
int s;
fd_p fd = fd_data + fdu;
TRACE1("[fd%d: turnoff]", fdu);
/*
* Don't turn off the motor yet if the drive is active.
* XXX shouldn't even schedule turnoff until drive is inactive
* and nothing is queued on it.
*/
if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fdu) {
fd->toffhandle = timeout(fd_turnoff, arg1, 4 * hz);
return;
}
s = splbio();
fd->flags &= ~FD_MOTOR;
set_motor(fd->fdc->fdcu, fd->fdsu, TURNOFF);
splx(s);
}
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_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_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);
/* XXX after a reset, silently believe the FDC will accept commands */
(void)fd_cmd(fdcu, 3, NE7CMD_SPECIFY,
NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
0);
if (fdc->flags & FDC_HAS_FIFO)
(void) enable_fifo(fdc);
}
/****************************************************************************/
/* 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 fdc_err(fdcu, "ready for output in input\n");
if (j <= 0)
return fdc_err(fdcu, bootverbose? "input ready timeout\n": 0);
#ifdef FDC_DEBUG
i = inb(baseport+FDDATA);
TRACE1("[FDDATA->0x%x]", (unsigned char)i);
return(i);
#else /* !FDC_DEBUG */
return inb(baseport+FDDATA);
#endif /* FDC_DEBUG */
}
/*
* fd_in: Like in_fdc, but allows you to see if it worked.
*/
static int
fd_in(fdcu_t fdcu, int *ptr)
{
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 fdc_err(fdcu, "ready for output in input\n");
if (j <= 0)
return fdc_err(fdcu, bootverbose? "input ready timeout\n": 0);
#ifdef FDC_DEBUG
i = inb(baseport+FDDATA);
TRACE1("[FDDATA->0x%x]", (unsigned char)i);
*ptr = i;
return 0;
#else /* !FDC_DEBUG */
i = inb(baseport+FDDATA);
if (ptr)
*ptr = i;
return 0;
#endif /* FDC_DEBUG */
}
int
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 fdc_err(fdcu, "direction bit not set\n");
/* 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 fdc_err(fdcu, bootverbose? "output ready timeout\n": 0);
/* Send the command and return */
outb(baseport+FDDATA, x);
TRACE1("[0x%x->FDDATA]", x);
return (0);
}
/****************************************************************************/
/* fdopen/fdclose */
/****************************************************************************/
int
Fdopen(dev_t dev, int flags, int mode, struct proc *p)
{
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 {
/*
* For each type of basic drive, make sure we are trying
* to open a type it can do,
*/
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_t dev, int flags, int mode, struct proc *p)
{
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);
}
static int
fdread(dev_t dev, struct uio *uio, int ioflag)
{
return (physio(fdstrategy, NULL, dev, 1, minphys, uio));
}
static int
fdwrite(dev_t dev, struct uio *uio, int ioflag)
{
return (physio(fdstrategy, NULL, dev, 0, minphys, uio));
}
/****************************************************************************/
/* fdstrategy */
/****************************************************************************/
void
fdstrategy(struct buf *bp)
{
unsigned nblocks, blknum, cando;
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;
#if NFT > 0
if (FDTYPE(minor(bp->b_dev)) & F_TAPE_TYPE) {
/* ft tapes do not (yet) support strategy i/o */
bp->b_error = ENODEV;
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
fdblk = 128 << (fd->ft->secsize);
if (!(bp->b_flags & B_FORMAT)) {
if ((fdu >= NFD) || (bp->b_blkno < 0)) {
printf(
"fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
fdu, (u_long)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.
*/
if (bp->b_blkno > 20000000) {
/*
* Reject unreasonably high block number, prevent the
* multiplication below from overflowing.
*/
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto bad;
}
blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
nblocks = fd->ft->size;
bp->b_resid = 0;
if (blknum + (bp->b_bcount / fdblk) > nblocks) {
if (blknum <= nblocks) {
cando = (nblocks - blknum) * fdblk;
bp->b_resid = bp->b_bcount - cando;
if (cando == 0)
goto bad; /* not actually bad but EOF */
} else {
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto bad;
}
}
bp->b_pblkno = bp->b_blkno;
s = splbio();
bufqdisksort(&fdc->head, bp);
untimeout(fd_turnoff, (caddr_t)fdu, fd->toffhandle); /* a good idea */
fdstart(fdcu);
splx(s);
return;
bad:
biodone(bp);
}
#ifdef SLICE
/****************************************************************************/
/* fdsIOreq */
/****************************************************************************/
static void
fdsIOreq(void *private ,struct buf *bp)
{
unsigned nblocks, blknum, cando;
int s;
fdcu_t fdcu;
fdu_t fdu;
fdc_p fdc;
fd_p fd;
size_t fdblk;
struct subdev *sd;
sd = private;
fd = sd->drive;
fdu = fd->unit;
fdc = fd->fdc;
fdcu = fdc->fdcu;
/* check for controller already busy with tape */
if (fdc->flags & FDC_TAPE_BUSY) {
bp->b_error = EBUSY;
bp->b_flags |= B_ERROR;
goto bad;
}
bp->b_driver1 = sd; /* squirrel away which device.. */
bp->b_resid = 0;
s = splbio();
bufqdisksort(&fdc->head, bp);
untimeout(fd_turnoff, (caddr_t)fdu, fd->toffhandle); /* a good idea */
fdstart(fdcu);
splx(s);
return;
bad:
biodone(bp);
return;
}
#endif /* SLICE */
/***************************************************************\
* 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_t fdcu)
{
int s;
s = splbio();
if(fdc_data[fdcu].state == DEVIDLE)
{
fdintr(fdcu);
}
splx(s);
}
static void
fd_iotimeout(void *arg1)
{
fdc_p fdc;
fdcu_t fdcu;
int s;
fdcu = (fdcu_t)arg1;
fdc = fdc_data + fdcu;
TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
/*
* 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!
* The FDC must not be reset directly, since that would
* interfere with the state machine. Instead, pretend that
* the command completed but was invalid. The state machine
* will reset the FDC and retry once.
*/
s = splbio();
fdc->status[0] = NE7_ST0_IC_IV;
fdc->flags &= ~FDC_STAT_VALID;
fdc->state = IOTIMEDOUT;
fdintr(fdcu);
splx(s);
}
/* just ensure it has the right spl */
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_t fdcu, fdc_p fdc)
{
struct subdev *sd;
int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
unsigned blknum = 0, b_cylinder = 0;
fdu_t fdu = fdc->fdu;
fd_p fd;
register struct buf *bp;
struct fd_formb *finfo = NULL;
size_t fdblk;
bp = bufq_first(&fdc->head);
if(!bp) {
/***********************************************\
* nothing left for this controller to do *
* Force into the IDLE state, *
\***********************************************/
fdc->state = DEVIDLE;
if(fdc->fd)
{
printf("fd%d: unexpected valid fd pointer\n",
fdc->fdu);
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
}
TRACE1("[fdc%d IDLE]", fdcu);
return(0);
}
#ifdef SLICE
sd = bp->b_driver1;
fd = sd->drive;
fdu = fd->unit;
#else
fdu = FDUNIT(minor(bp->b_dev));
fd = fd_data + fdu;
#endif
fdblk = 128 << fd->ft->secsize;
if (fdc->fd && (fd != fdc->fd))
{
printf("fd%d: confused fd pointers\n", fdu);
}
read = bp->b_flags & B_READ;
format = bp->b_flags & B_FORMAT;
if(format) {
finfo = (struct fd_formb *)bp->b_data;
fd->skip = (char *)&(finfo->fd_formb_cylno(0))
- (char *)finfo;
}
if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
fd->skip/fdblk;
b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
}
TRACE1("fd%d", fdu);
TRACE1("[%s]", fdstates[fdc->state]);
TRACE1("(0x%x)", fd->flags);
untimeout(fd_turnoff, (caddr_t)fdu, fd->toffhandle);
fd->toffhandle = 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 its 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);
}
if (fdc->flags & FDC_NEEDS_RESET) {
fdc->state = RESETCTLR;
fdc->flags &= ~FDC_NEEDS_RESET;
} else
fdc->state = DOSEEK;
break;
case DOSEEK:
if (b_cylinder == (unsigned)fd->track)
{
fdc->state = SEEKCOMPLETE;
break;
}
if (fd_cmd(fdcu, 3, NE7CMD_SEEK,
fd->fdsu, b_cylinder * fd->ft->steptrac,
0))
{
/*
* seek command not accepted, looks like
* the FDC went off to the Saints...
*/
fdc->retry = 6; /* try a reset */
return(retrier(fdcu));
}
fd->track = FD_NO_TRACK;
fdc->state = SEEKWAIT;
return(0); /* will return later */
case SEEKWAIT:
/* allow heads to settle */
timeout(fd_pseudointr, (caddr_t)fdcu, hz / 16);
fdc->state = SEEKCOMPLETE;
return(0); /* will return later */
case SEEKCOMPLETE : /* SEEK DONE, START DMA */
/* Make sure seek really happened*/
if(fd->track == FD_NO_TRACK)
{
int descyl = b_cylinder * fd->ft->steptrac;
do {
/*
* This might be a "ready changed" interrupt,
* which cannot really happen since the
* RDY pin is hardwired to + 5 volts. This
* generally indicates a "bouncing" intr
* line, so do one of the following:
*
* When running on an enhanced FDC that is
* known to not go stuck after responding
* with INVALID, fetch all interrupt states
* until seeing either an INVALID or a
* real interrupt condition.
*
* When running on a dumb old NE765, give
* up immediately. The controller will
* provide up to four dummy RC interrupt
* conditions right after reset (for the
* corresponding four drives), so this is
* our only chance to get notice that it
* was not the FDC that caused the interrupt.
*/
if (fd_sense_int(fdc, &st0, &cyl)
== FD_NOT_VALID)
return 0;
if(fdc->fdct == FDC_NE765
&& (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
return 0; /* hope for a real intr */
} while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
if (0 == descyl)
{
int failed = 0;
/*
* seek to cyl 0 requested; make sure we are
* really there
*/
if (fd_sense_drive_status(fdc, &st3))
failed = 1;
if ((st3 & NE7_ST3_T0) == 0) {
printf(
"fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
fdu, st3, NE7_ST3BITS);
failed = 1;
}
if (failed)
{
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);
if (fdc->retry < 3)
fdc->retry = 3;
return(retrier(fdcu));
}
}
fd->track = b_cylinder;
isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
format ? bp->b_bcount : fdblk, fdc->dmachan);
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 */
if(fd_sense_drive_status(fdc, &st3) != 0)
{
/* stuck controller? */
isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
format ? bp->b_bcount : fdblk,
fdc->dmachan);
fdc->retry = 6; /* reset the beast */
return(retrier(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 */
if(fd_cmd(fdcu, 6,
NE7CMD_FORMAT,
head << 2 | fdu,
finfo->fd_formb_secshift,
finfo->fd_formb_nsecs,
finfo->fd_formb_gaplen,
finfo->fd_formb_fillbyte,
0))
{
/* controller fell over */
isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
format ? bp->b_bcount : fdblk,
fdc->dmachan);
fdc->retry = 6;
return(retrier(fdcu));
}
}
else
{
if (fd_cmd(fdcu, 9,
(read ? NE7CMD_READ : NE7CMD_WRITE),
head << 2 | fdu, /* head & unit */
fd->track, /* track */
head,
sec, /* sector + 1 */
fd->ft->secsize, /* sector size */
sectrac, /* sectors/track */
fd->ft->gap, /* gap size */
fd->ft->datalen, /* data length */
0))
{
/* the beast is sleeping again */
isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
format ? bp->b_bcount : fdblk,
fdc->dmachan);
fdc->retry = 6;
return(retrier(fdcu));
}
}
fdc->state = IOCOMPLETE;
fd->tohandle = timeout(fd_iotimeout, (caddr_t)fdcu, hz);
return(0); /* will return later */
case IOCOMPLETE: /* IO DONE, post-analyze */
untimeout(fd_iotimeout, (caddr_t)fdcu, fd->tohandle);
if (fd_read_status(fdc, fd->fdsu))
{
isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
format ? bp->b_bcount : fdblk,
fdc->dmachan);
if (fdc->retry < 6)
fdc->retry = 6; /* force a reset */
return retrier(fdcu);
}
fdc->state = IOTIMEDOUT;
/* FALLTHROUGH */
case IOTIMEDOUT:
isa_dmadone(bp->b_flags, bp->b_data + 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 - bp->b_resid)
{
/* set up next transfer */
fdc->state = DOSEEK;
}
else
{
/* ALL DONE */
fd->skip = 0;
bufq_remove(&fdc->head, bp);
biodone(bp);
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
fdc->state = FINDWORK;
}
return(1);
case RESETCTLR:
fdc_reset(fdc);
fdc->retry++;
fdc->state = RESETCOMPLETE;
return (0);
case RESETCOMPLETE:
/*
* Discard all the results from the reset so that they
* can't cause an unexpected interrupt later.
*/
for (i = 0; i < 4; i++)
(void)fd_sense_int(fdc, &st0, &cyl);
fdc->state = STARTRECAL;
/* Fall through. */
case STARTRECAL:
if(fd_cmd(fdcu,
2, NE7CMD_RECAL, fdu,
0)) /* Recalibrate Function */
{
/* arrgl */
fdc->retry = 6;
return(retrier(fdcu));
}
fdc->state = RECALWAIT;
return(0); /* will return later */
case RECALWAIT:
/* allow heads to settle */
timeout(fd_pseudointr, (caddr_t)fdcu, hz / 8);
fdc->state = RECALCOMPLETE;
return(0); /* will return later */
case RECALCOMPLETE:
do {
/*
* See SEEKCOMPLETE for a comment on this:
*/
if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
return 0;
if(fdc->fdct == FDC_NE765
&& (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
return 0; /* hope for a real intr */
} while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
{
if(fdc->retry > 3)
/*
* a recalibrate from beyond cylinder 77
* will "fail" due to the FDC limitations;
* since people used to complain much about
* the failure message, try not logging
* this one if it seems to be the first
* time in a line
*/
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 */
}
if (fdc->flags & FDC_NEEDS_RESET) {
fdc->state = RESETCTLR;
fdc->flags &= ~FDC_NEEDS_RESET;
} else {
/*
* If all motors were off, then the controller was
* reset, so it has lost track of the current
* cylinder. Recalibrate to handle this case.
*/
fdc->state = STARTRECAL;
}
return(1); /* will return immediatly */
default:
printf("fdc%d: Unexpected FD int->", fdcu);
if (fd_read_status(fdc, fd->fdsu) == 0)
printf("FDC status :%x %x %x %x %x %x %x ",
fdc->status[0],
fdc->status[1],
fdc->status[2],
fdc->status[3],
fdc->status[4],
fdc->status[5],
fdc->status[6] );
else
printf("No status available ");
if (fd_sense_int(fdc, &st0, &cyl) != 0)
{
printf("[controller is dead now]\n");
return(0);
}
printf("ST0 = %x, PCN = %x\n", st0, cyl);
return(0);
}
/*XXX confusing: some branches return immediately, others end up here*/
return(1); /* Come back immediatly to new state */
}
static int
retrier(fdcu)
fdcu_t fdcu;
{
struct subdev *sd;
fdc_p fdc = fdc_data + fdcu;
register struct buf *bp;
#ifdef SLICE
struct fd_data *fd;
int fdu;
#endif
bp = bufq_first(&fdc->head);
#ifdef SLICE
sd = bp->b_driver1;
fd = sd->drive;
fdu = fd->unit;
if(fd->options & FDOPT_NORETRY)
goto fail;
#else
if(fd_data[FDUNIT(minor(bp->b_dev))].options & FDOPT_NORETRY)
goto fail;
#endif
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:
{
#ifdef SLICE
printf("fd%d: hard error, block %d ", fdu,
fd->skip / DEV_BSIZE);
#else
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;
#endif /* !SLICE */
if (fdc->flags & FDC_STAT_VALID)
{
printf(
" (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
fdc->status[0], NE7_ST0BITS,
fdc->status[1], NE7_ST1BITS,
fdc->status[2], NE7_ST2BITS,
fdc->status[3], fdc->status[4],
fdc->status[5]);
}
else
printf(" (No status)\n");
}
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
bp->b_resid += bp->b_bcount - fdc->fd->skip;
bufq_remove(&fdc->head, bp);
fdc->fd->skip = 0;
biodone(bp);
fdc->state = FINDWORK;
fdc->flags |= FDC_NEEDS_RESET;
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
return(1);
}
fdc->retry++;
return(1);
}
#ifdef SLICE
static int
fdformat( struct subdev *sd, struct fd_formb *finfo, struct proc *p)
#else /* !SLICE */
static int
fdformat(dev, finfo, p)
dev_t dev;
struct fd_formb *finfo;
struct proc *p;
#endif /* !SLICE */
{
fdu_t fdu;
fd_p fd;
struct buf *bp;
int rv = 0, s;
size_t fdblk;
#ifdef SLICE
fd = sd->drive;
fdu = fd->unit;
#else
fdu = FDUNIT(minor(dev));
fd = &fd_data[fdu];
#endif
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;
/*
* keep the process from being swapped
*/
p->p_flag |= P_PHYSIO;
bzero((void *)bp, sizeof(struct buf));
bp->b_flags = B_BUSY | B_PHYS | B_FORMAT;
bp->b_proc = p;
/*
* 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_data = (caddr_t)finfo;
/* now do the format */
#ifdef SLICE
bp->b_driver1 = sd;
fdsIOreq(sd, bp);
#else /* !SLICE */
bp->b_dev = dev;
fdstrategy(bp);
#endif /* !SLICE */
/* ...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;
biodone(bp);
}
if(bp->b_flags & B_ERROR)
rv = bp->b_error;
/*
* allow the process to be swapped
*/
p->p_flag &= ~P_PHYSIO;
free(bp, M_TEMP);
return rv;
}
/*
* TODO: don't allocate buffer on stack.
*/
static int
fdioctl(dev, cmd, addr, flag, p)
dev_t dev;
u_long 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
#ifdef SLICE
/*
* if SLICE is defined then only ft accesses come here
* so break the rest off to another function for SLICE access.
*/
return (ENOTTY);
}
/*
* Slice ioctls come here
*/
static int
fdsioctl( void *private, u_long cmd, caddr_t addr, int flag, struct proc *p)
{
struct subdev *sd = private;
fd_p fd = sd->drive;
fdu_t fdu = fd->unit;
fdc_p fdc = fd->fdc;
fdcu_t fdcu = fdc->fdcu;
size_t fdblk;
int error = 0;
#endif /* SLICE */
fdblk = 128 << fd->ft->secsize;
switch (cmd)
{
#ifndef SLICE
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(dkmodpart(dev, RAW_PART), fdstrategy, dl)
== 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,
(u_long)0)) != 0)
break;
error = writedisklabel(dev, fdstrategy,
(struct disklabel *)buffer);
break;
#endif /* !SLICE */
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
#ifdef SLICE
error = fdformat(sd, (struct fd_formb *)addr, p);
#else
error = fdformat(dev, (struct fd_formb *)addr, p);
#endif
break;
case FD_GTYPE: /* get drive type */
*(struct fd_type *)addr = *fd->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->ft = *(struct fd_type *)addr;
break;
case FD_GOPTS: /* get drive options */
*(int *)addr = fd->options;
break;
case FD_SOPTS: /* set drive options */
fd->options = *(int *)addr;
break;
default:
error = ENOTTY;
break;
}
return (error);
}
static fd_devsw_installed = 0;
static void fd_drvinit(void *notused )
{
if( ! fd_devsw_installed ) {
cdevsw_add_generic(BDEV_MAJOR,CDEV_MAJOR, &fd_cdevsw);
fd_devsw_installed = 1;
}
}
SYSINIT(fddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,fd_drvinit,NULL)
#ifdef SLICE
static int
fdsopen(void *private, int flags, int mode, struct proc *p)
{
struct subdev *sd;
sd = private;
if((flags & (FREAD|FWRITE)) != 0) {
return(Fdopen(makedev(0,sd->minor), flags , mode, p));
} else {
return(fdclose(makedev(0,sd->minor), 0 , mode, p));
}
}
#if 0
static void
fdsclose(void *private, int flags, int mode, struct proc *p)
{
struct subdev *sd;
sd = private;
fdclose(makedev(0,sd->minor), 0 , 0, p);
return ;
}
#endif /* 0 */
#endif /* SLICE */
#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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