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freebsd/sys/dev/fdc/fdc.c
Peter Wemm ada54f9e54 Untangle some resource matching loops that were getting on my nerves 
and seemed to be getting cut/pasted to places they shouldn't be.
2000-10-15 08:50:45 +00:00

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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.
*
* Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
* aided by the Linux floppy driver modifications from David Bateman
* (dbateman@eng.uts.edu.au).
*
* 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
* $FreeBSD$
*
*/
#include "opt_fdc.h"
#include "card.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/disklabel.h>
#include <sys/devicestat.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/syslog.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/clock.h>
#include <machine/ioctl_fd.h>
#include <machine/resource.h>
#include <machine/stdarg.h>
#include <isa/isavar.h>
#include <isa/isareg.h>
#include <isa/fdreg.h>
#include <isa/fdc.h>
#include <isa/rtc.h>
/* misuse a flag to identify format operation */
/* configuration flags */
#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
/* internally used only, not really from CMOS: */
#define RTCFDT_144M_PRETENDED 0x1000
/* error returns for fd_cmd() */
#define FD_FAILED -1
#define FD_NOT_VALID -2
#define FDC_ERRMAX 100 /* do not log more */
#define NUMTYPES 17
#define NUMDENS (NUMTYPES - 7)
/* 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_640 9
#define FD_1232 10
#define FD_1480in5_25 11
#define FD_1440in5_25 12
#define FD_820in5_25 13
#define FD_800in5_25 14
#define FD_720in5_25 15
#define FD_360in5_25 16
#define FD_640in5_25 17
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 */
{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 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 */
{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
};
#define DRVS_PER_CTLR 2 /* 2 floppies */
/***********************************************************************\
* Per controller structure. *
\***********************************************************************/
static devclass_t fdc_devclass;
/***********************************************************************\
* 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;
#define FD_NO_TRACK -2
int track; /* where we think the head is */
int options; /* user configurable options, see ioctl_fd.h */
struct callout_handle toffhandle;
struct callout_handle tohandle;
struct devstat device_stats;
device_t dev;
fdu_t fdu;
};
struct fdc_ivars {
int fdunit;
};
static devclass_t fd_devclass;
/***********************************************************************\
* 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) *
\***********************************************************************/
/* needed for ft driver, thus exported */
int in_fdc(struct fdc_data *);
int out_fdc(struct fdc_data *, int);
/* internal functions */
static void fdc_intr(void *);
static void set_motor(struct fdc_data *, int, int);
# define TURNON 1
# define TURNOFF 0
static timeout_t fd_turnoff;
static timeout_t fd_motor_on;
static void fd_turnon(struct fd_data *);
static void fdc_reset(fdc_p);
static int fd_in(struct fdc_data *, int *);
static void fdstart(struct fdc_data *);
static timeout_t fd_iotimeout;
static timeout_t fd_pseudointr;
static int fdstate(struct fdc_data *);
static int retrier(struct fdc_data *);
static int fdformat(dev_t, struct fd_formb *, struct proc *);
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
#define PIOREAD 13
#ifdef FDC_DEBUG
static char const * const fdstates[] =
{
"DEVIDLE",
"FINDWORK",
"DOSEEK",
"SEEKCOMPLETE",
"IOCOMPLETE",
"RECALCOMPLETE",
"STARTRECAL",
"RESETCTLR",
"SEEKWAIT",
"RECALWAIT",
"MOTORWAIT",
"IOTIMEDOUT",
"RESETCOMPLETE",
"PIOREAD",
};
/* 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 */
static void
fdout_wr(fdc_p fdc, u_int8_t v)
{
bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
}
static u_int8_t
fdsts_rd(fdc_p fdc)
{
return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
}
static void
fddata_wr(fdc_p fdc, u_int8_t v)
{
bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
}
static u_int8_t
fddata_rd(fdc_p fdc)
{
return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
}
static void
fdctl_wr_isa(fdc_p fdc, u_int8_t v)
{
bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
}
#if NCARD > 0
static void
fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v)
{
bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v);
}
#endif
#if 0
static u_int8_t
fdin_rd(fdc_p fdc)
{
return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
}
#endif
static d_open_t Fdopen; /* NOTE, not fdopen */
static d_close_t fdclose;
static d_ioctl_t fdioctl;
static d_strategy_t fdstrategy;
#define CDEV_MAJOR 9
#define BDEV_MAJOR 2
static struct cdevsw fd_cdevsw = {
/* open */ Fdopen,
/* close */ fdclose,
/* read */ physread,
/* write */ physwrite,
/* ioctl */ fdioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ fdstrategy,
/* name */ "fd",
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ D_DISK,
/* bmaj */ BDEV_MAJOR
};
static int
fdc_err(struct fdc_data *fdc, const char *s)
{
fdc->fdc_errs++;
if (s) {
if (fdc->fdc_errs < FDC_ERRMAX)
device_printf(fdc->fdc_dev, "%s", s);
else if (fdc->fdc_errs == FDC_ERRMAX)
device_printf(fdc->fdc_dev, "too many errors, not "
"logging any more\n");
}
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(struct fdc_data *fdc, 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(fdc, va_arg(ap, int)) < 0)
{
char msg[50];
snprintf(msg, sizeof(msg),
"cmd %x failed at out byte %d of %d\n",
cmd, n + 1, n_out);
return fdc_err(fdc, msg);
}
}
n_in = va_arg(ap, int);
for (n = 0; n < n_in; n++)
{
int *ptr = va_arg(ap, int *);
if (fd_in(fdc, ptr) < 0)
{
char msg[50];
snprintf(msg, sizeof(msg),
"cmd %02x failed at in byte %d of %d\n",
cmd, n + 1, n_in);
return fdc_err(fdc, 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, I8207X_CONFIGURE) < 0)
return fdc_err(fdc, "Enable FIFO failed\n");
/* If command is invalid, return */
j = 100000;
while ((i = fdsts_rd(fdc) & (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, 3,
0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
fdc_reset(fdc);
return fdc_err(fdc, "Enable FIFO failed\n");
}
fdc->flags |= FDC_HAS_FIFO;
return 0;
}
if (fd_cmd(fdc, 4,
I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
return fdc_err(fdc, "Re-enable FIFO failed\n");
return 0;
}
static int
fd_sense_drive_status(fdc_p fdc, int *st3p)
{
int st3;
if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
{
return fdc_err(fdc, "Sense Drive Status failed\n");
}
if (st3p)
*st3p = st3;
return 0;
}
static int
fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
{
int cyl, st0, ret;
ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
if (ret) {
(void)fdc_err(fdc,
"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, &cyl) < 0) {
return fdc_err(fdc, "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, &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 */
/****************************************************************************/
static int
fdc_alloc_resources(struct fdc_data *fdc)
{
device_t dev;
int ispnp, ispcmcia;
dev = fdc->fdc_dev;
ispnp = (fdc->flags & FDC_ISPNP) != 0;
ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
/*
* On standard ISA, we don't just use an 8 port range
* (e.g. 0x3f0-0x3f7) since that covers an IDE control
* register at 0x3f6.
*
* Isn't PC hardware wonderful.
*
* The Y-E Data PCMCIA FDC doesn't have this problem, it
* uses the register with offset 6 for pseudo-DMA, and the
* one with offset 7 as control register.
*/
fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
&fdc->rid_ioport, 0ul, ~0ul,
ispcmcia ? 8 : (ispnp ? 1 : 6),
RF_ACTIVE);
if (fdc->res_ioport == 0) {
device_printf(dev, "cannot reserve I/O port range\n");
return ENXIO;
}
fdc->portt = rman_get_bustag(fdc->res_ioport);
fdc->porth = rman_get_bushandle(fdc->res_ioport);
if (!ispcmcia) {
/*
* Some BIOSen report the device at 0x3f2-0x3f5,0x3f7
* and some at 0x3f0-0x3f5,0x3f7. We detect the former
* by checking the size and adjust the port address
* accordingly.
*/
if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
fdc->port_off = -2;
/*
* Register the control port range as rid 1 if it
* isn't there already. Most PnP BIOSen will have
* already done this but non-PnP configurations don't.
*
* And some (!!) report 0x3f2-0x3f5 and completely
* leave out the control register! It seems that some
* non-antique controller chips have a different
* method of programming the transfer speed which
* doesn't require the control register, but it's
* mighty bogus as the chip still responds to the
* address for the control register.
*/
if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
u_long ctlstart;
/* Find the control port, usually 0x3f7 */
ctlstart = rman_get_start(fdc->res_ioport) +
fdc->port_off + 7;
bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
}
/*
* Now (finally!) allocate the control port.
*/
fdc->rid_ctl = 1;
fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
&fdc->rid_ctl,
0ul, ~0ul, 1, RF_ACTIVE);
if (fdc->res_ctl == 0) {
device_printf(dev,
"cannot reserve control I/O port range\n");
return ENXIO;
}
fdc->ctlt = rman_get_bustag(fdc->res_ctl);
fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
}
fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
&fdc->rid_irq, 0ul, ~0ul, 1,
RF_ACTIVE);
if (fdc->res_irq == 0) {
device_printf(dev, "cannot reserve interrupt line\n");
return ENXIO;
}
if ((fdc->flags & FDC_NODMA) == 0) {
fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
&fdc->rid_drq, 0ul, ~0ul, 1,
RF_ACTIVE);
if (fdc->res_drq == 0) {
device_printf(dev, "cannot reserve DMA request line\n");
return ENXIO;
}
fdc->dmachan = fdc->res_drq->r_start;
}
return 0;
}
static void
fdc_release_resources(struct fdc_data *fdc)
{
device_t dev;
dev = fdc->fdc_dev;
if (fdc->res_irq != 0) {
bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
fdc->res_irq);
bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
fdc->res_irq);
}
if (fdc->res_ctl != 0) {
bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
fdc->res_ctl);
bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
fdc->res_ctl);
}
if (fdc->res_ioport != 0) {
bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
fdc->res_ioport);
bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
fdc->res_ioport);
}
if (fdc->res_drq != 0) {
bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
fdc->res_drq);
bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
fdc->res_drq);
}
}
/****************************************************************************/
/* autoconfiguration stuff */
/****************************************************************************/
static struct isa_pnp_id fdc_ids[] = {
{0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
{0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
{0}
};
static int
fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct fdc_ivars *ivars = device_get_ivars(child);
switch (which) {
case FDC_IVAR_FDUNIT:
*result = ivars->fdunit;
break;
default:
return ENOENT;
}
return 0;
}
/*
* fdc controller section.
*/
static int
fdc_probe(device_t dev)
{
int error, ic_type;
struct fdc_data *fdc;
fdc = device_get_softc(dev);
bzero(fdc, sizeof *fdc);
fdc->fdc_dev = dev;
fdc->fdctl_wr = fdctl_wr_isa;
/* Check pnp ids */
error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
if (error == ENXIO)
return ENXIO;
if (error == 0)
fdc->flags |= FDC_ISPNP;
/* Attempt to allocate our resources for the duration of the probe */
error = fdc_alloc_resources(fdc);
if (error)
goto out;
/* First - lets reset the floppy controller */
fdout_wr(fdc, 0);
DELAY(100);
fdout_wr(fdc, FDO_FRST);
/* see if it can handle a command */
if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
NE7_SPEC_2(2, 0), 0)) {
error = ENXIO;
goto out;
}
if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
ic_type = (u_char)ic_type;
switch (ic_type) {
case 0x80:
device_set_desc(dev, "NEC 765 or clone");
fdc->fdct = FDC_NE765;
break;
case 0x81:
device_set_desc(dev, "Intel 82077 or clone");
fdc->fdct = FDC_I82077;
break;
case 0x90:
device_set_desc(dev, "NEC 72065B or clone");
fdc->fdct = FDC_NE72065;
break;
default:
device_set_desc(dev, "generic floppy controller");
fdc->fdct = FDC_UNKNOWN;
break;
}
}
out:
fdc_release_resources(fdc);
return (error);
}
#if NCARD > 0
static int
fdc_pccard_probe(device_t dev)
{
int error;
struct fdc_data *fdc;
fdc = device_get_softc(dev);
bzero(fdc, sizeof *fdc);
fdc->fdc_dev = dev;
fdc->fdctl_wr = fdctl_wr_pcmcia;
fdc->flags |= FDC_ISPCMCIA | FDC_NODMA;
/* Attempt to allocate our resources for the duration of the probe */
error = fdc_alloc_resources(fdc);
if (error)
goto out;
/* First - lets reset the floppy controller */
fdout_wr(fdc, 0);
DELAY(100);
fdout_wr(fdc, FDO_FRST);
/* see if it can handle a command */
if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
NE7_SPEC_2(2, 0), 0)) {
error = ENXIO;
goto out;
}
device_set_desc(dev, "Y-E Data PCMCIA floppy");
fdc->fdct = FDC_NE765;
out:
fdc_release_resources(fdc);
return (error);
}
static int
fdc_pccard_detach(device_t dev)
{
struct fdc_data *fdc;
int error;
fdc = device_get_softc(dev);
/* have our children detached first */
if ((error = bus_generic_detach(dev)))
return (error);
if ((fdc->flags & FDC_ATTACHED) == 0) {
device_printf(dev, "already unloaded\n");
return (0);
}
fdc->flags &= ~FDC_ATTACHED;
BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq,
fdc->fdc_intr);
fdc_release_resources(fdc);
device_printf(dev, "unload\n");
return (0);
}
#endif /* NCARD > 0 */
/*
* Add a child device to the fdc controller. It will then be probed etc.
*/
static void
fdc_add_child(device_t dev, const char *name, int unit)
{
int disabled;
struct fdc_ivars *ivar;
device_t child;
ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT);
if (ivar == NULL)
return;
bzero(ivar, sizeof *ivar);
if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
ivar->fdunit = 0;
child = device_add_child(dev, name, unit);
if (child == NULL)
return;
device_set_ivars(child, ivar);
if (resource_int_value(name, unit, "disabled", &disabled) == 0
&& disabled != 0)
device_disable(child);
}
static int
fdc_attach(device_t dev)
{
struct fdc_data *fdc;
int i, error;
const char *name;
fdc = device_get_softc(dev);
error = fdc_alloc_resources(fdc);
if (error) {
device_printf(dev, "cannot re-aquire resources\n");
return error;
}
error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr);
if (error) {
device_printf(dev, "cannot setup interrupt\n");
return error;
}
fdc->fdcu = device_get_unit(dev);
fdc->flags |= FDC_ATTACHED;
if ((fdc->flags & FDC_NODMA) == 0) {
/* Acquire the DMA channel forever, The driver will do the rest */
/* XXX should integrate with rman */
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 */
fdout_wr(fdc, ((fdc->fdout = 0)));
bioq_init(&fdc->head);
/*
* Probe and attach any children. We should probably detect
* devices from the BIOS unless overridden.
*/
name = device_get_nameunit(dev);
i = -1;
while ((i = resource_query_string(i, "at", name)) != -1)
fdc_add_child(dev, resource_query_name(i),
resource_query_unit(i));
return (bus_generic_attach(dev));
}
static int
fdc_print_child(device_t me, device_t child)
{
int retval = 0;
retval += bus_print_child_header(me, child);
retval += printf(" on %s drive %d\n", device_get_nameunit(me),
fdc_get_fdunit(child));
return (retval);
}
static device_method_t fdc_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, fdc_probe),
DEVMETHOD(device_attach, fdc_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_print_child, fdc_print_child),
DEVMETHOD(bus_read_ivar, fdc_read_ivar),
/* Our children never use any other bus interface methods. */
{ 0, 0 }
};
static driver_t fdc_driver = {
"fdc",
fdc_methods,
sizeof(struct fdc_data)
};
DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
#if NCARD > 0
static device_method_t fdc_pccard_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, fdc_pccard_probe),
DEVMETHOD(device_attach, fdc_attach),
DEVMETHOD(device_detach, fdc_pccard_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_print_child, fdc_print_child),
DEVMETHOD(bus_read_ivar, fdc_read_ivar),
/* Our children never use any other bus interface methods. */
{ 0, 0 }
};
static driver_t fdc_pccard_driver = {
"fdc",
fdc_pccard_methods,
sizeof(struct fdc_data)
};
DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0);
#endif /* NCARD > 0 */
static void fd_clone __P((void *arg, char *name, int namelen, dev_t *dev));
static struct {
char *match;
int minor;
int link;
} fd_suffix[] = {
{ "a", 0, 1 },
{ "b", 0, 1 },
{ "c", 0, 1 },
{ "d", 0, 1 },
{ "e", 0, 1 },
{ "f", 0, 1 },
{ "g", 0, 1 },
{ "h", 0, 1 },
{ ".1720", 1, 0 },
{ ".1480", 2, 0 },
{ ".1440", 3, 0 },
{ ".1200", 4, 0 },
{ ".820", 5, 0 },
{ ".800", 6, 0 },
{ ".720", 7, 0 },
{ ".360", 8, 0 },
{ ".640", 9, 0 },
{ ".1232", 10, 0 },
{ 0, 0 }
};
static void
fd_clone(arg, name, namelen, dev)
void *arg;
char *name;
int namelen;
dev_t *dev;
{
int u, d, i;
char *n;
dev_t pdev;
if (*dev != NODEV)
return;
if (dev_stdclone(name, &n, "fd", &u) != 2)
return;
for (i = 0; ; i++) {
if (fd_suffix[i].match == NULL)
return;
if (strcmp(n, fd_suffix[i].match))
continue;
d = fd_suffix[i].minor;
break;
}
if (fd_suffix[i].link == 0) {
*dev = make_dev(&fd_cdevsw, (u << 6) + d,
UID_ROOT, GID_OPERATOR, 0640, name);
} else {
pdev = makedev(fd_cdevsw.d_maj, (u << 6) + d);
*dev = make_dev_alias(pdev, name);
}
}
/******************************************************************/
/*
* devices attached to the controller section.
*/
static int
fd_probe(device_t dev)
{
int i;
u_int fdt, st0, st3;
struct fd_data *fd;
struct fdc_data *fdc;
fdsu_t fdsu;
static int fd_fifo = 0;
fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
fd = device_get_softc(dev);
fdc = device_get_softc(device_get_parent(dev));
bzero(fd, sizeof *fd);
fd->dev = dev;
fd->fdc = fdc;
fd->fdsu = fdsu;
fd->fdu = device_get_unit(dev);
#ifdef __i386__
/* look up what bios thinks we have */
switch (fd->fdu) {
case 0:
if ((fdc->flags & FDC_ISPCMCIA))
fdt = RTCFDT_144M;
else if (device_get_flags(fdc->fdc_dev) & 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;
}
#else
fdt = RTCFDT_144M; /* XXX probably */
#endif
/* is there a unit? */
if (fdt == RTCFDT_NONE)
return (ENXIO);
/* select it */
set_motor(fdc, fdsu, TURNON);
DELAY(1000000); /* 1 sec */
/* XXX This doesn't work before the first set_motor() */
if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
&& (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
&& enable_fifo(fdc) == 0) {
device_printf(device_get_parent(dev),
"FIFO enabled, %d bytes threshold\n", fifo_threshold);
}
fd_fifo = 1;
if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
&& (st3 & NE7_ST3_T0)) {
/* if at track 0, first seek inwards */
/* seek some steps: */
fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
DELAY(300000); /* ...wait a moment... */
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(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
/* ...wait a moment... */
DELAY(300000);
/* make ctrlr happy: */
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(fdc, 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(fdc, fdsu, TURNOFF);
if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
return (ENXIO);
fd->track = FD_NO_TRACK;
fd->fdc = fdc;
fd->fdsu = fdsu;
fd->options = 0;
callout_handle_init(&fd->toffhandle);
callout_handle_init(&fd->tohandle);
switch (fdt) {
case RTCFDT_12M:
device_set_desc(dev, "1200-KB 5.25\" drive");
fd->type = FD_1200;
break;
case RTCFDT_144M | RTCFDT_144M_PRETENDED:
device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
fdt = RTCFDT_144M;
fd->type = FD_1440;
case RTCFDT_144M:
device_set_desc(dev, "1440-KB 3.5\" drive");
fd->type = FD_1440;
break;
case RTCFDT_288M:
case RTCFDT_288M_1:
device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
fd->type = FD_1440;
break;
case RTCFDT_360K:
device_set_desc(dev, "360-KB 5.25\" drive");
fd->type = FD_360;
break;
case RTCFDT_720K:
printf("720-KB 3.5\" drive");
fd->type = FD_720;
break;
default:
return (ENXIO);
}
return (0);
}
static int
fd_attach(device_t dev)
{
struct fd_data *fd;
static int cdevsw_add_done = 0;
fd = device_get_softc(dev);
if (!cdevsw_add_done) {
cdevsw_add(&fd_cdevsw); /* XXX */
cdevsw_add_done++;
}
EVENTHANDLER_REGISTER(dev_clone, fd_clone, 0, 1000);
make_dev(&fd_cdevsw, (fd->fdu << 6),
UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu);
/*
* Export the drive to the devstat interface.
*/
devstat_add_entry(&fd->device_stats, device_get_name(dev),
device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
DEVSTAT_PRIORITY_FD);
return (0);
}
static int
fd_detach(device_t dev)
{
struct fd_data *fd;
fd = device_get_softc(dev);
untimeout(fd_turnoff, fd, fd->toffhandle);
return (0);
}
static device_method_t fd_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, fd_probe),
DEVMETHOD(device_attach, fd_attach),
DEVMETHOD(device_detach, fd_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
{ 0, 0 }
};
static driver_t fd_driver = {
"fd",
fd_methods,
sizeof(struct fd_data)
};
DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
/****************************************************************************/
/* motor control stuff */
/* remember to not deselect the drive we're working on */
/****************************************************************************/
static void
set_motor(struct fdc_data *fdc, int fdsu, int turnon)
{
int fdout = fdc->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);
}
fdout_wr(fdc, fdout);
fdc->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(fdc, 3, NE7CMD_SPECIFY,
NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
0);
if (fdc->flags & FDC_HAS_FIFO)
(void) enable_fifo(fdc);
}
}
static void
fd_turnoff(void *xfd)
{
int s;
fd_p fd = xfd;
TRACE1("[fd%d: turnoff]", fd->fdu);
s = splbio();
/*
* Don't turn off the motor yet if the drive is active.
*
* If we got here, this could only mean we missed an interrupt.
* This can e. g. happen on the Y-E Date PCMCIA floppy controller
* after a controller reset. Just schedule a pseudo-interrupt
* so the state machine gets re-entered.
*/
if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
fdc_intr(fd->fdc);
splx(s);
return;
}
fd->flags &= ~FD_MOTOR;
set_motor(fd->fdc, fd->fdsu, TURNOFF);
splx(s);
}
static void
fd_motor_on(void *xfd)
{
int s;
fd_p fd = xfd;
s = splbio();
fd->flags &= ~FD_MOTOR_WAIT;
if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
{
fdc_intr(fd->fdc);
}
splx(s);
}
static void
fd_turnon(fd_p fd)
{
if(!(fd->flags & FD_MOTOR))
{
fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
set_motor(fd->fdc, fd->fdsu, TURNON);
timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */
}
}
static void
fdc_reset(fdc_p fdc)
{
/* Try a reset, keep motor on */
fdout_wr(fdc, 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 */
fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
DELAY(100);
fdout_wr(fdc, fdc->fdout);
TRACE1("[0x%x->FDOUT]", fdc->fdout);
/* XXX after a reset, silently believe the FDC will accept commands */
(void)fd_cmd(fdc, 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(struct fdc_data *fdc)
{
int i, j = 100000;
while ((i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM))
!= (NE7_DIO|NE7_RQM) && j-- > 0)
if (i == NE7_RQM)
return fdc_err(fdc, "ready for output in input\n");
if (j <= 0)
return fdc_err(fdc, bootverbose? "input ready timeout\n": 0);
#ifdef FDC_DEBUG
i = fddata_rd(fdc);
TRACE1("[FDDATA->0x%x]", (unsigned char)i);
return(i);
#else /* !FDC_DEBUG */
return fddata_rd(fdc);
#endif /* FDC_DEBUG */
}
/*
* fd_in: Like in_fdc, but allows you to see if it worked.
*/
static int
fd_in(struct fdc_data *fdc, int *ptr)
{
int i, j = 100000;
while ((i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM))
!= (NE7_DIO|NE7_RQM) && j-- > 0)
if (i == NE7_RQM)
return fdc_err(fdc, "ready for output in input\n");
if (j <= 0)
return fdc_err(fdc, bootverbose? "input ready timeout\n": 0);
#ifdef FDC_DEBUG
i = fddata_rd(fdc);
TRACE1("[FDDATA->0x%x]", (unsigned char)i);
*ptr = i;
return 0;
#else /* !FDC_DEBUG */
i = fddata_rd(fdc);
if (ptr)
*ptr = i;
return 0;
#endif /* FDC_DEBUG */
}
int
out_fdc(struct fdc_data *fdc, int x)
{
int i;
/* Check that the direction bit is set */
i = 100000;
while ((fdsts_rd(fdc) & NE7_DIO) && i-- > 0);
if (i <= 0) return fdc_err(fdc, "direction bit not set\n");
/* Check that the floppy controller is ready for a command */
i = 100000;
while ((fdsts_rd(fdc) & NE7_RQM) == 0 && i-- > 0);
if (i <= 0)
return fdc_err(fdc, bootverbose? "output ready timeout\n": 0);
/* Send the command and return */
fddata_wr(fdc, 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));
fd_p fd;
fdc_p fdc;
/* check bounds */
if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
return (ENXIO);
fdc = fd->fdc;
if ((fdc == NULL) || (fd->type == NO_TYPE))
return (ENXIO);
if (type > NUMDENS)
return (ENXIO);
if (type == 0)
type = fd->type;
else {
/*
* For each type of basic drive, make sure we are trying
* to open a type it can do,
*/
if (type != fd->type) {
switch (fd->type) {
case FD_360:
return (ENXIO);
case FD_720:
if ( type != FD_820
&& type != FD_800
&& type != FD_640
)
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_1232:
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_640:
type = FD_640in5_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
&& type != FD_640
)
return(ENXIO);
break;
}
}
}
fd->ft = fd_types + type - 1;
fd->flags |= FD_OPEN;
return 0;
}
int
fdclose(dev_t dev, int flags, int mode, struct proc *p)
{
fdu_t fdu = FDUNIT(minor(dev));
struct fd_data *fd;
fd = devclass_get_softc(fd_devclass, fdu);
fd->flags &= ~FD_OPEN;
fd->options &= ~FDOPT_NORETRY;
return (0);
}
/****************************************************************************/
/* fdstrategy */
/****************************************************************************/
void
fdstrategy(struct bio *bp)
{
unsigned nblocks, blknum, cando;
int s;
fdu_t fdu;
fdc_p fdc;
fd_p fd;
size_t fdblk;
fdu = FDUNIT(minor(bp->bio_dev));
fd = devclass_get_softc(fd_devclass, fdu);
if (fd == 0)
panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
(u_long)major(bp->bio_dev), (u_long)minor(bp->bio_dev));
fdc = fd->fdc;
if (fd->type == NO_TYPE) {
bp->bio_error = ENXIO;
bp->bio_flags |= BIO_ERROR;
goto bad;
};
fdblk = 128 << (fd->ft->secsize);
if (!(bp->bio_cmd & BIO_FORMAT)) {
if (bp->bio_blkno < 0) {
printf(
"fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
fdu, (u_long)bp->bio_blkno, bp->bio_bcount);
bp->bio_error = EINVAL;
bp->bio_flags |= BIO_ERROR;
goto bad;
}
if ((bp->bio_bcount % fdblk) != 0) {
bp->bio_error = EINVAL;
bp->bio_flags |= BIO_ERROR;
goto bad;
}
}
/*
* Set up block calculations.
*/
if (bp->bio_blkno > 20000000) {
/*
* Reject unreasonably high block number, prevent the
* multiplication below from overflowing.
*/
bp->bio_error = EINVAL;
bp->bio_flags |= BIO_ERROR;
goto bad;
}
blknum = (unsigned) bp->bio_blkno * DEV_BSIZE/fdblk;
nblocks = fd->ft->size;
bp->bio_resid = 0;
if (blknum + (bp->bio_bcount / fdblk) > nblocks) {
if (blknum <= nblocks) {
cando = (nblocks - blknum) * fdblk;
bp->bio_resid = bp->bio_bcount - cando;
if (cando == 0)
goto bad; /* not actually bad but EOF */
} else {
bp->bio_error = EINVAL;
bp->bio_flags |= BIO_ERROR;
goto bad;
}
}
bp->bio_pblkno = bp->bio_blkno;
s = splbio();
bioqdisksort(&fdc->head, bp);
untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */
/* Tell devstat we are starting on the transaction */
devstat_start_transaction(&fd->device_stats);
device_busy(fd->dev);
fdstart(fdc);
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(struct fdc_data *fdc)
{
int s;
s = splbio();
if(fdc->state == DEVIDLE)
{
fdc_intr(fdc);
}
splx(s);
}
static void
fd_iotimeout(void *xfdc)
{
fdc_p fdc;
int s;
fdc = xfdc;
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;
fdc_intr(fdc);
splx(s);
}
/* just ensure it has the right spl */
static void
fd_pseudointr(void *xfdc)
{
int s;
s = splbio();
fdc_intr(xfdc);
splx(s);
}
/***********************************************************************\
* fdintr *
* keep calling the state machine until it returns a 0 *
* ALWAYS called at SPLBIO *
\***********************************************************************/
static void
fdc_intr(void *xfdc)
{
fdc_p fdc = xfdc;
while(fdstate(fdc))
;
}
/*
* magic pseudo-DMA initialization for YE FDC. Sets count and
* direction
*/
#define SET_BCDR(fdc,wr,cnt,port) \
bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
((cnt)-1) & 0xff); \
bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
/*
* fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
*/
static int fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
{
u_char *cptr = (u_char *)addr;
if (flags == BIO_READ) {
if (fdc->state != PIOREAD) {
fdc->state = PIOREAD;
return(0);
};
SET_BCDR(fdc, 0, count, 0);
bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
FDC_YE_DATAPORT, cptr, count);
} else {
bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
FDC_YE_DATAPORT, cptr, count);
SET_BCDR(fdc, 0, count, 0);
};
return(1);
}
/***********************************************************************\
* The controller state machine. *
* if it returns a non zero value, it should be called again immediatly *
\***********************************************************************/
static int
fdstate(fdc_p fdc)
{
int read, format, head, i, sec = 0, sectrac, st0, cyl, st3, idf;
unsigned blknum = 0, b_cylinder = 0;
fdu_t fdu = fdc->fdu;
fd_p fd;
register struct bio *bp;
struct fd_formb *finfo = NULL;
size_t fdblk;
bp = fdc->bp;
if (bp == NULL) {
bp = bioq_first(&fdc->head);
if (bp != NULL) {
bioq_remove(&fdc->head, bp);
fdc->bp = bp;
}
}
if (bp == NULL) {
/***********************************************\
* nothing left for this controller to do *
* Force into the IDLE state, *
\***********************************************/
fdc->state = DEVIDLE;
if (fdc->fd) {
device_printf(fdc->fdc_dev,
"unexpected valid fd pointer\n");
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
}
TRACE1("[fdc%d IDLE]", fdc->fdcu);
return (0);
}
fdu = FDUNIT(minor(bp->bio_dev));
fd = devclass_get_softc(fd_devclass, fdu);
fdblk = 128 << fd->ft->secsize;
if (fdc->fd && (fd != fdc->fd))
device_printf(fd->dev, "confused fd pointers\n");
read = bp->bio_cmd == BIO_READ;
if (read)
idf = ISADMA_READ;
else
idf = ISADMA_WRITE;
format = bp->bio_cmd & BIO_FORMAT;
if (format) {
finfo = (struct fd_formb *)bp->bio_data;
fd->skip = (char *)&(finfo->fd_formb_cylno(0))
- (char *)finfo;
}
if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
blknum = (unsigned) bp->bio_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, fd, fd->toffhandle);
fd->toffhandle = timeout(fd_turnoff, fd, 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;
fdc->fdctl_wr(fdc, 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(fd);
return (0);
}
else /* at least make sure we are selected */
{
set_motor(fdc, 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(fdc, 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(fdc));
}
fd->track = FD_NO_TRACK;
fdc->state = SEEKWAIT;
return(0); /* will return later */
case SEEKWAIT:
/* allow heads to settle */
timeout(fd_pseudointr, fdc, 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(fdc));
}
}
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(fdc));
}
}
fd->track = b_cylinder;
if (!(fdc->flags & FDC_NODMA))
isa_dmastart(idf, bp->bio_data+fd->skip,
format ? bp->bio_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? */
if (!(fdc->flags & FDC_NODMA))
isa_dmadone(idf,
bp->bio_data + fd->skip,
format ? bp->bio_bcount : fdblk,
fdc->dmachan);
fdc->retry = 6; /* reset the beast */
return (retrier(fdc));
}
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) {
if (fdc->flags & FDC_NODMA) {
/*
* This seems to be necessary for
* whatever obscure reason; if we omit
* it, we end up filling the sector ID
* fields of the newly formatted track
* entirely with garbage, causing
* `wrong cylinder' errors all over
* the place when trying to read them
* back.
*
* Umpf.
*/
SET_BCDR(fdc, 1, bp->bio_bcount, 0);
(void)fdcpio(fdc,bp->bio_cmd,
bp->bio_data+fd->skip,
bp->bio_bcount);
}
/* formatting */
if(fd_cmd(fdc, 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 */
if (!(fdc->flags & FDC_NODMA))
isa_dmadone(idf,
bp->bio_data + fd->skip,
format ? bp->bio_bcount : fdblk,
fdc->dmachan);
fdc->retry = 6;
return (retrier(fdc));
}
} else {
if (fdc->flags & FDC_NODMA) {
/*
* this seems to be necessary even when
* reading data
*/
SET_BCDR(fdc, 1, fdblk, 0);
/*
* perform the write pseudo-DMA before
* the WRITE command is sent
*/
if (!read)
(void)fdcpio(fdc,bp->bio_cmd,
bp->bio_data+fd->skip,
fdblk);
}
if (fd_cmd(fdc, 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 */
if (!(fdc->flags & FDC_NODMA))
isa_dmadone(idf,
bp->bio_data + fd->skip,
format ? bp->bio_bcount : fdblk,
fdc->dmachan);
fdc->retry = 6;
return (retrier(fdc));
}
}
if (fdc->flags & FDC_NODMA)
/*
* if this is a read, then simply await interrupt
* before performing PIO
*/
if (read && !fdcpio(fdc,bp->bio_cmd,
bp->bio_data+fd->skip,fdblk)) {
fd->tohandle = timeout(fd_iotimeout, fdc, hz);
return(0); /* will return later */
};
/*
* write (or format) operation will fall through and
* await completion interrupt
*/
fdc->state = IOCOMPLETE;
fd->tohandle = timeout(fd_iotimeout, fdc, hz);
return (0); /* will return later */
case PIOREAD:
/*
* actually perform the PIO read. The IOCOMPLETE case
* removes the timeout for us.
*/
(void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk);
fdc->state = IOCOMPLETE;
/* FALLTHROUGH */
case IOCOMPLETE: /* IO DONE, post-analyze */
untimeout(fd_iotimeout, fdc, fd->tohandle);
if (fd_read_status(fdc, fd->fdsu)) {
if (!(fdc->flags & FDC_NODMA))
isa_dmadone(idf, bp->bio_data + fd->skip,
format ? bp->bio_bcount : fdblk,
fdc->dmachan);
if (fdc->retry < 6)
fdc->retry = 6; /* force a reset */
return (retrier(fdc));
}
fdc->state = IOTIMEDOUT;
/* FALLTHROUGH */
case IOTIMEDOUT:
if (!(fdc->flags & FDC_NODMA))
isa_dmadone(idf, bp->bio_data + fd->skip,
format ? bp->bio_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(fdc));
}
/* All OK */
fd->skip += fdblk;
if (!format && fd->skip < bp->bio_bcount - bp->bio_resid) {
/* set up next transfer */
fdc->state = DOSEEK;
} else {
/* ALL DONE */
fd->skip = 0;
fdc->bp = NULL;
device_unbusy(fd->dev);
devstat_end_transaction_bio(&fd->device_stats, 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(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
/* arrgl */
fdc->retry = 6;
return (retrier(fdc));
}
fdc->state = RECALWAIT;
return (0); /* will return later */
case RECALWAIT:
/* allow heads to settle */
timeout(fd_pseudointr, fdc, 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(fdc));
}
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.
* But first, discard the results of the reset.
*/
fdc->state = RESETCOMPLETE;
}
return (1); /* will return immediatly */
default:
device_printf(fdc->fdc_dev, "unexpected FD int->");
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(struct fdc_data *fdc)
{
struct bio *bp;
struct fd_data *fd;
int fdu;
bp = fdc->bp;
/* XXX shouldn't this be cached somewhere? */
fdu = FDUNIT(minor(bp->bio_dev));
fd = devclass_get_softc(fd_devclass, fdu);
if (fd->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_bio_dev = bp->bio_dev;
/* Trick diskerr */
bp->bio_dev = makedev(major(bp->bio_dev),
(FDUNIT(minor(bp->bio_dev))<<3)|RAW_PART);
diskerr(bp, "hard error", LOG_PRINTF,
fdc->fd->skip / DEV_BSIZE,
(struct disklabel *)NULL);
bp->bio_dev = sav_bio_dev;
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->bio_flags |= BIO_ERROR;
bp->bio_error = EIO;
bp->bio_resid += bp->bio_bcount - fdc->fd->skip;
fdc->bp = NULL;
fdc->fd->skip = 0;
device_unbusy(fd->dev);
devstat_end_transaction_bio(&fdc->fd->device_stats, bp);
biodone(bp);
fdc->state = FINDWORK;
fdc->flags |= FDC_NEEDS_RESET;
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
return (1);
}
fdc->retry++;
return (1);
}
static void
fdbiodone(struct bio *bp)
{
wakeup(bp);
}
static int
fdformat(dev, finfo, p)
dev_t dev;
struct fd_formb *finfo;
struct proc *p;
{
fdu_t fdu;
fd_p fd;
struct bio *bp;
int rv = 0, s;
size_t fdblk;
fdu = FDUNIT(minor(dev));
fd = devclass_get_softc(fd_devclass, fdu);
fdblk = 128 << fd->ft->secsize;
/* set up a buffer header for fdstrategy() */
bp = (struct bio *)malloc(sizeof(struct bio), M_TEMP, M_NOWAIT);
if(bp == 0)
return ENOMEM;
/*
* keep the process from being swapped
*/
PHOLD(p);
bzero((void *)bp, sizeof(*bp));
bp->bio_cmd = BIO_FORMAT;
/*
* calculate a fake blkno, so fdstrategy() would initiate a
* seek to the requested cylinder
*/
bp->bio_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
+ finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
bp->bio_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
bp->bio_data = (caddr_t)finfo;
/* now do the format */
bp->bio_dev = dev;
bp->bio_done = fdbiodone;
fdstrategy(bp);
/* ...and wait for it to complete */
s = splbio();
while(!(bp->bio_flags & BIO_DONE)) {
rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz);
if (rv == EWOULDBLOCK)
break;
}
splx(s);
if (rv == EWOULDBLOCK) {
/* timed out */
rv = EIO;
device_unbusy(fd->dev);
}
if (bp->bio_flags & BIO_ERROR)
rv = bp->bio_error;
/*
* allow the process to be swapped
*/
PRELE(p);
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 = devclass_get_softc(fd_devclass, fdu);
size_t fdblk;
struct fd_type *fdt;
struct disklabel *dl;
char buffer[DEV_BSIZE];
int error = 0;
fdblk = 128 << fd->ft->secsize;
switch (cmd) {
case DIOCGDINFO:
bzero(buffer, sizeof (buffer));
dl = (struct disklabel *)buffer;
dl->d_secsize = fdblk;
fdt = fd->ft;
dl->d_secpercyl = fdt->size / fdt->tracks;
dl->d_type = DTYPE_FLOPPY;
if (readdisklabel(dkmodpart(dev, RAW_PART), 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, (struct disklabel *)buffer);
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->ft;
break;
case FD_STYPE: /* set drive type */
/* this is considered harmful; only allow for superuser */
if (suser(p) != 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);
}
/*
* 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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