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freebsd-dev/sys/dev/fdc/fdc.c
Warner Losh 6d6fa4fdc9 Break out the isa and pccard front ends from fdc. This is the first 
step in making this driver more attachment neutral.  Others plan on
adding acpi front ends.

Still need to cleanup the MI part of the driver because it isn't as
bus independent as it could be.
2004-07-07 22:35:27 +00:00

2438 lines
61 KiB
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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)
*
* Copyright (c) 2001 Joerg Wunsch,
* joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 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
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_fdc.h"
#include <sys/param.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/devicestat.h>
#include <sys/disk.h>
#include <sys/fcntl.h>
#include <sys/fdcio.h>
#include <sys/filio.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/rman.h>
#include <sys/systm.h>
#include <machine/clock.h>
#include <machine/stdarg.h>
#include <isa/isavar.h>
#include <isa/isareg.h>
#include <dev/fdc/fdcreg.h>
#include <dev/fdc/fdcvar.h>
#include <isa/rtc.h>
#define FDBIO_FORMAT BIO_CMD2
/*
* fdc maintains a set (1!) of ivars per child of each controller.
*/
enum fdc_device_ivars {
FDC_IVAR_FDUNIT,
};
/*
* Simple access macros for the ivars.
*/
#define FDC_ACCESSOR(A, B, T) \
static __inline T fdc_get_ ## A(device_t dev) \
{ \
uintptr_t v; \
BUS_READ_IVAR(device_get_parent(dev), dev, FDC_IVAR_ ## B, &v); \
return (T) v; \
}
FDC_ACCESSOR(fdunit, FDUNIT, int)
/* configuration flags for fdc */
#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
/*
* Stop retrying after this many DMA overruns. Since each retry takes
* one revolution, with 300 rpm., 25 retries take approximately 5
* seconds which the read attempt will block in case the DMA overrun
* is persistent.
*/
#define FDC_DMAOV_MAX 25
/*
* Timeout value for the PIO loops to wait until the FDC main status
* register matches our expectations (request for master, direction
* bit). This is supposed to be a number of microseconds, although
* timing might actually not be very accurate.
*
* Timeouts of 100 msec are believed to be required for some broken
* (old) hardware.
*/
#define FDSTS_TIMEOUT 100000
/*
* Number of subdevices that can be used for different density types.
*/
#define NUMDENS 16
#define FDBIO_RDSECTID BIO_CMD1
/*
* List of native drive densities. Order must match enum fd_drivetype
* in <sys/fdcio.h>. Upon attaching the drive, each of the
* programmable subdevices is initialized with the native density
* definition.
*/
static struct fd_type fd_native_types[] =
{
{ 0 }, /* FDT_NONE */
{ 9,2,0xFF,0x2A,40, 720,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_360K */
{ 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* FDT_12M */
{ 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* FDT_720K */
{ 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */
#if 0 /* we currently don't handle 2.88 MB */
{ 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /*FDT_288M*/
#else
{ 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* FDT_144M */
#endif
};
/*
* 360 KB 5.25" and 720 KB 3.5" drives don't have automatic density
* selection, they just start out with their native density (or lose).
* So 1.2 MB 5.25", 1.44 MB 3.5", and 2.88 MB 3.5" drives have their
* respective lists of densities to search for.
*/
static struct fd_type fd_searchlist_12m[] = {
{ 15,2,0xFF,0x1B,80,2400,FDC_500KBPS,2,0x54,1,0,FL_MFM }, /* 1.2M */
{ 9,2,0xFF,0x23,40, 720,FDC_300KBPS,2,0x50,1,0,FL_MFM|FL_2STEP }, /* 360K */
{ 9,2,0xFF,0x20,80,1440,FDC_300KBPS,2,0x50,1,0,FL_MFM }, /* 720K */
};
static struct fd_type fd_searchlist_144m[] = {
{ 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */
{ 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */
};
/* We search for 1.44M first since this is the most common case. */
static struct fd_type fd_searchlist_288m[] = {
{ 18,2,0xFF,0x1B,80,2880,FDC_500KBPS,2,0x6C,1,0,FL_MFM }, /* 1.44M */
#if 0
{ 36,2,0xFF,0x1B,80,5760,FDC_1MBPS, 2,0x4C,1,1,FL_MFM|FL_PERPND } /* 2.88M */
#endif
{ 9,2,0xFF,0x20,80,1440,FDC_250KBPS,2,0x50,1,0,FL_MFM }, /* 720K */
};
#define MAX_SEC_SIZE (128 << 3)
#define MAX_CYLINDER 85 /* some people really stress their drives
* up to cyl 82 */
#define MAX_HEAD 1
devclass_t fdc_devclass;
/*
* Per drive structure (softc).
*/
struct fd_data {
struct fdc_data *fdc; /* pointer to controller structure */
int fdsu; /* this units number on this controller */
enum fd_drivetype type; /* drive type */
struct fd_type *ft; /* pointer to current type descriptor */
struct fd_type fts[NUMDENS]; /* type descriptors */
int flags;
#define FD_OPEN 0x01 /* it's open */
#define FD_NONBLOCK 0x02 /* O_NONBLOCK set */
#define FD_ACTIVE 0x04 /* it's active */
#define FD_MOTOR 0x08 /* motor should be on */
#define FD_MOTOR_WAIT 0x10 /* motor coming up */
#define FD_UA 0x20 /* force unit attention */
int skip;
int hddrv;
#define FD_NO_TRACK -2
int track; /* where we think the head is */
int options; /* user configurable options, see fdcio.h */
struct callout_handle toffhandle;
struct callout_handle tohandle;
struct devstat *device_stats;
struct cdev *masterdev;
device_t dev;
fdu_t fdu;
};
struct fdc_ivars {
int fdunit;
};
static devclass_t fd_devclass;
/* configuration flags for fd */
#define FD_TYPEMASK 0x0f /* drive type, matches enum
* fd_drivetype; on i386 machines, if
* given as 0, use RTC type for fd0
* and fd1 */
#define FD_DTYPE(flags) ((flags) & FD_TYPEMASK)
#define FD_NO_CHLINE 0x10 /* drive does not support changeline
* aka. unit attention */
#define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just
* assume it is there */
/*
* 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)
*/
/*
* Function declarations, same (chaotic) order as they appear in the
* file. Re-ordering is too late now, it would only obfuscate the
* diffs against old and offspring versions (like the PC98 one).
*
* Anyone adding functions here, please keep this sequence the same
* as below -- makes locating a particular function in the body much
* easier.
*/
static u_int8_t fdsts_rd(fdc_p);
static void fddata_wr(fdc_p, u_int8_t);
static u_int8_t fddata_rd(fdc_p);
#if 0
static u_int8_t fdin_rd(fdc_p);
#endif
static int fdc_err(struct fdc_data *, const char *);
static int enable_fifo(fdc_p fdc);
static int fd_sense_drive_status(fdc_p, int *);
static int fd_sense_int(fdc_p, int *, int *);
static int fd_read_status(fdc_p);
static void fdc_add_child(device_t, const char *, int);
static int fd_probe(device_t);
static int fd_attach(device_t);
static int fd_detach(device_t);
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 int out_fdc(struct fdc_data *, int);
/*
* The open function is named fdopen() to avoid confusion with fdopen()
* in fd(4). The difference is now only meaningful for debuggers.
*/
static d_open_t fdopen;
static d_close_t fdclose;
static d_strategy_t fdstrategy;
static void fdstart(struct fdc_data *);
static timeout_t fd_iotimeout;
static timeout_t fd_pseudointr;
static driver_intr_t fdc_intr;
static int fdcpio(fdc_p, long, caddr_t, u_int);
static int fdautoselect(struct cdev *);
static int fdstate(struct fdc_data *);
static int retrier(struct fdc_data *);
static void fdbiodone(struct bio *);
static int fdmisccmd(struct cdev *, u_int, void *);
static d_ioctl_t fdioctl;
static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
#ifdef FDC_DEBUG
/* CAUTION: fd_debug causes huge amounts of logging output */
static int volatile fd_debug = 0;
#define TRACE0(arg) do { if (fd_debug) printf(arg); } while (0)
#define TRACE1(arg1, arg2) do { if (fd_debug) printf(arg1, arg2); } while (0)
#else /* FDC_DEBUG */
#define TRACE0(arg) do { } while (0)
#define TRACE1(arg1, arg2) do { } while (0)
#endif /* FDC_DEBUG */
/*
* Bus space handling (access to low-level IO).
*/
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 u_int8_t
fdin_rd(fdc_p fdc)
{
return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
}
static struct cdevsw fd_cdevsw = {
.d_version = D_VERSION,
.d_open = fdopen,
.d_close = fdclose,
.d_read = physread,
.d_write = physwrite,
.d_ioctl = fdioctl,
.d_strategy = fdstrategy,
.d_name = "fd",
.d_flags = D_DISK | D_NEEDGIANT,
};
/*
* Auxiliary functions. Well, some only. Others are scattered
* throughout the entire file.
*/
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 ...
*/
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) {
/*
* 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 = FDSTS_TIMEOUT;
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;
}
DELAY(1);
}
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 i, ret;
for (i = ret = 0; i < 7; i++) {
/*
* XXX types are poorly chosen. Only bytes can be 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;
}
int
fdc_alloc_resources(struct fdc_data *fdc)
{
device_t dev;
int ispnp, ispcmcia, nports;
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;
fdc->rid_ctl = 1;
/*
* 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.
*/
nports = ispcmcia ? 8 : (ispnp ? 1 : 6);
/*
* Some ACPI BIOSen have _CRS objects for the floppy device that
* split the I/O port resource into several resources. We detect
* this case by checking if there are more than 2 IOPORT resources.
* If so, we use the resource with the smallest start address as
* the port RID and the largest start address as the control RID.
*/
if (bus_get_resource_count(dev, SYS_RES_IOPORT, 2) != 0) {
u_long min_start, max_start, tmp;
int i;
/* Find the min/max start addresses and their RIDs. */
max_start = 0ul;
min_start = ~0ul;
for (i = 0; bus_get_resource_count(dev, SYS_RES_IOPORT, i) > 0;
i++) {
tmp = bus_get_resource_start(dev, SYS_RES_IOPORT, i);
KASSERT(tmp != 0, ("bogus resource"));
if (tmp < min_start) {
min_start = tmp;
fdc->rid_ioport = i;
}
if (tmp > max_start) {
max_start = tmp;
fdc->rid_ctl = i;
}
}
if (min_start + 7 != max_start) {
device_printf(dev, "I/O to control range incorrect\n");
return (ENXIO);
}
}
fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
&fdc->rid_ioport, 0ul, ~0ul,
nports, RF_ACTIVE);
if (fdc->res_ioport == 0) {
device_printf(dev, "cannot reserve I/O port range (%d ports)\n",
nports);
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->res_ctl = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
&fdc->rid_ctl, RF_ACTIVE);
if (fdc->res_ctl == 0) {
device_printf(dev,
"cannot reserve control I/O port range (control port)\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_any(dev, SYS_RES_IRQ, &fdc->rid_irq,
RF_ACTIVE | RF_SHAREABLE);
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_any(dev, SYS_RES_DRQ,
&fdc->rid_drq, RF_ACTIVE | RF_SHAREABLE);
if (fdc->res_drq == 0) {
device_printf(dev, "cannot reserve DMA request line\n");
fdc->flags |= FDC_NODMA;
} else
fdc->dmachan = rman_get_start(fdc->res_drq);
}
return 0;
}
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);
}
}
/*
* Configuration/initialization stuff, per controller.
*/
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;
}
int
fdc_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);
/* reset controller, turn motor off */
fdout_wr(fdc, 0);
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);
return (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 flags;
struct fdc_ivars *ivar;
device_t child;
ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
if (ivar == NULL)
return;
if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
ivar->fdunit = 0;
child = device_add_child(dev, name, unit);
if (child == NULL) {
free(ivar, M_DEVBUF);
return;
}
device_set_ivars(child, ivar);
if (resource_int_value(name, unit, "flags", &flags) == 0)
device_set_flags(child, flags);
if (resource_disabled(name, unit))
device_disable(child);
}
int
fdc_attach(device_t dev)
{
struct fdc_data *fdc;
const char *name, *dname;
int i, error, dunit;
fdc = device_get_softc(dev);
error = fdc_alloc_resources(fdc);
if (error) {
device_printf(dev, "cannot re-acquire resources\n");
return error;
}
error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
INTR_TYPE_BIO | INTR_ENTROPY, 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 | FDC_NEEDS_RESET;
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 = 0;
while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0)
fdc_add_child(dev, dname, dunit);
if ((error = bus_generic_attach(dev)) != 0)
return (error);
return (0);
}
int
fdc_print_child(device_t me, device_t child)
{
int retval = 0, flags;
retval += bus_print_child_header(me, child);
retval += printf(" on %s drive %d", device_get_nameunit(me),
fdc_get_fdunit(child));
if ((flags = device_get_flags(me)) != 0)
retval += printf(" flags %#x", flags);
retval += printf("\n");
return (retval);
}
/*
* Configuration/initialization, per drive.
*/
static int
fd_probe(device_t dev)
{
int i;
u_int st0, st3;
struct fd_data *fd;
struct fdc_data *fdc;
fdsu_t fdsu;
int flags;
fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
fd = device_get_softc(dev);
fdc = device_get_softc(device_get_parent(dev));
flags = device_get_flags(dev);
bzero(fd, sizeof *fd);
fd->dev = dev;
fd->fdc = fdc;
fd->fdsu = fdsu;
fd->fdu = device_get_unit(dev);
fd->flags = FD_UA; /* make sure fdautoselect() will be called */
fd->type = FD_DTYPE(flags);
/*
* XXX I think using __i386__ is wrong here since we actually want to probe
* for the machine type, not the CPU type (so non-PC arch's like the PC98 will
* fail the probe). However, for whatever reason, testing for _MACHINE_ARCH
* == i386 breaks the test on FreeBSD/Alpha.
*/
#if defined(__i386__) || defined(__amd64__)
if (fd->type == FDT_NONE && (fd->fdu == 0 || fd->fdu == 1)) {
/* Look up what the BIOS thinks we have. */
if (fd->fdu == 0) {
if ((fdc->flags & FDC_ISPCMCIA))
/*
* Somewhat special. No need to force the
* user to set device flags, since the Y-E
* Data PCMCIA floppy is always a 1.44 MB
* device.
*/
fd->type = FDT_144M;
else
fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
} else {
fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
}
if (fd->type == FDT_288M_1)
fd->type = FDT_288M;
}
#endif /* __i386__ || __amd64__ */
/* is there a unit? */
if (fd->type == FDT_NONE)
return (ENXIO);
/* select it */
set_motor(fdc, fdsu, TURNON);
fdc_reset(fdc); /* XXX reset, then unreset, etc. */
DELAY(1000000); /* 1 sec */
/* XXX This doesn't work before the first set_motor() */
if ((fdc->flags & FDC_HAS_FIFO) == 0 &&
fdc->fdct == FDC_ENHANCED &&
(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);
}
if ((flags & FD_NO_PROBE) == 0) {
/* 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 ((flags & FD_NO_PROBE) == 0 &&
(st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
return (ENXIO);
switch (fd->type) {
case FDT_12M:
device_set_desc(dev, "1200-KB 5.25\" drive");
fd->type = FDT_12M;
break;
case FDT_144M:
device_set_desc(dev, "1440-KB 3.5\" drive");
fd->type = FDT_144M;
break;
case FDT_288M:
device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
fd->type = FDT_288M;
break;
case FDT_360K:
device_set_desc(dev, "360-KB 5.25\" drive");
fd->type = FDT_360K;
break;
case FDT_720K:
device_set_desc(dev, "720-KB 3.5\" drive");
fd->type = FDT_720K;
break;
default:
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);
/* initialize densities for subdevices */
for (i = 0; i < NUMDENS; i++)
memcpy(fd->fts + i, fd_native_types + fd->type,
sizeof(struct fd_type));
return (0);
}
static int
fd_attach(device_t dev)
{
struct fd_data *fd;
fd = device_get_softc(dev);
fd->masterdev = make_dev(&fd_cdevsw, fd->fdu,
UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu);
fd->masterdev->si_drv1 = fd;
fd->device_stats = devstat_new_entry(device_get_name(dev),
device_get_unit(dev), 0, 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);
devstat_remove_entry(fd->device_stats);
destroy_dev(fd->masterdev);
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);
/*
* More auxiliary functions.
*/
/*
* 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;
fdout = fdc->fdout;
if (turnon) {
fdout &= ~FDO_FDSEL;
fdout |= (FDO_MOEN0 << fdsu) | FDO_FDMAEN | FDO_FRST | fdsu;
} else
fdout &= ~(FDO_MOEN0 << fdsu);
fdc->fdout = fdout;
fdout_wr(fdc, fdout);
TRACE1("[0x%x->FDOUT]", fdout);
}
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 IO functions, take care of the main status register, timeout
* in case the desired status bits are never set.
*
* These PIO loops initially start out with short delays between
* each iteration in the expectation that the required condition
* is usually met quickly, so it can be handled immediately. After
* about 1 ms, stepping is increased to achieve a better timing
* accuracy in the calls to DELAY().
*/
static int
fd_in(struct fdc_data *fdc, int *ptr)
{
int i, j, step;
for (j = 0, step = 1;
(i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != (NE7_DIO|NE7_RQM) &&
j < FDSTS_TIMEOUT;
j += step) {
if (i == NE7_RQM)
return (fdc_err(fdc, "ready for output in input\n"));
if (j == 1000)
step = 1000;
DELAY(step);
}
if (j >= FDSTS_TIMEOUT)
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 */
}
static int
out_fdc(struct fdc_data *fdc, int x)
{
int i, j, step;
for (j = 0, step = 1;
(i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM)) != NE7_RQM &&
j < FDSTS_TIMEOUT;
j += step) {
if (i == (NE7_DIO|NE7_RQM))
return (fdc_err(fdc, "ready for input in output\n"));
if (j == 1000)
step = 1000;
DELAY(step);
}
if (j >= FDSTS_TIMEOUT)
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);
}
/*
* Block device driver interface functions (interspersed with even more
* auxiliary functions).
*/
static int
fdopen(struct cdev *dev, int flags, int mode, struct thread *td)
{
fd_p fd;
fdc_p fdc;
int rv, unitattn, dflags;
fd = dev->si_drv1;
if (fd == NULL)
return (ENXIO);
fdc = fd->fdc;
if ((fdc == NULL) || (fd->type == FDT_NONE))
return (ENXIO);
dflags = device_get_flags(fd->dev);
/*
* This is a bit bogus. It's still possible that e. g. a
* descriptor gets inherited to a child, but then it's at
* least for the same subdevice. By checking FD_OPEN here, we
* can ensure that a device isn't attempted to be opened with
* different densities at the same time where the second open
* could clobber the settings from the first one.
*/
if (fd->flags & FD_OPEN)
return (EBUSY);
if (flags & FNONBLOCK) {
/*
* Unfortunately, physio(9) discards its ioflag
* argument, thus preventing us from seeing the
* IO_NDELAY bit. So we need to keep track
* ourselves.
*/
fd->flags |= FD_NONBLOCK;
fd->ft = 0;
} else {
/*
* Figure out a unit attention condition.
*
* If UA has been forced, proceed.
*
* If the drive has no changeline support,
* or if the drive parameters have been lost
* due to previous non-blocking access,
* assume a forced UA condition.
*
* If motor is off, turn it on for a moment
* and select our drive, in order to read the
* UA hardware signal.
*
* If motor is on, and our drive is currently
* selected, just read the hardware bit.
*
* If motor is on, but active for another
* drive on that controller, we are lost. We
* cannot risk to deselect the other drive, so
* we just assume a forced UA condition to be
* on the safe side.
*/
unitattn = 0;
if ((dflags & FD_NO_CHLINE) != 0 ||
(fd->flags & FD_UA) != 0 ||
fd->ft == 0) {
unitattn = 1;
fd->flags &= ~FD_UA;
} else if (fdc->fdout & (FDO_MOEN0 | FDO_MOEN1 |
FDO_MOEN2 | FDO_MOEN3)) {
if ((fdc->fdout & FDO_FDSEL) == fd->fdsu)
unitattn = fdin_rd(fdc) & FDI_DCHG;
else
unitattn = 1;
} else {
set_motor(fdc, fd->fdsu, TURNON);
unitattn = fdin_rd(fdc) & FDI_DCHG;
set_motor(fdc, fd->fdsu, TURNOFF);
}
if (unitattn && (rv = fdautoselect(dev)) != 0)
return (rv);
}
fd->flags |= FD_OPEN;
if ((fdc->flags & FDC_NODMA) == 0) {
if (fdc->dmacnt++ == 0) {
isa_dma_acquire(fdc->dmachan);
isa_dmainit(fdc->dmachan, MAX_SEC_SIZE);
}
}
/*
* Clearing the DMA overrun counter at open time is a bit messy.
* Since we're only managing one counter per controller, opening
* the second drive could mess it up. Anyway, if the DMA overrun
* condition is really persistent, it will eventually time out
* still. OTOH, clearing it here will ensure we'll at least start
* trying again after a previous (maybe even long ago) failure.
* Also, this is merely a stop-gap measure only that should not
* happen during normal operation, so we can tolerate it to be a
* bit sloppy about this.
*/
fdc->dma_overruns = 0;
return 0;
}
static int
fdclose(struct cdev *dev, int flags, int mode, struct thread *td)
{
struct fd_data *fd;
fdc_p fdc;
fd = dev->si_drv1;
fdc = fd->fdc;
fd->flags &= ~(FD_OPEN | FD_NONBLOCK);
fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR);
if ((fdc->flags & FDC_NODMA) == 0)
if (--fdc->dmacnt == 0)
isa_dma_release(fdc->dmachan);
return (0);
}
static void
fdstrategy(struct bio *bp)
{
long blknum, nblocks;
int s;
fdu_t fdu;
fdc_p fdc;
fd_p fd;
size_t fdblk;
fd = bp->bio_dev->si_drv1;
fdu = fd->fdu;
fdc = fd->fdc;
bp->bio_resid = bp->bio_bcount;
if (fd->type == FDT_NONE || fd->ft == 0) {
if (fd->type != FDT_NONE && (fd->flags & FD_NONBLOCK))
bp->bio_error = EAGAIN;
else
bp->bio_error = ENXIO;
bp->bio_flags |= BIO_ERROR;
goto bad;
}
fdblk = 128 << (fd->ft->secsize);
if (bp->bio_cmd != FDBIO_FORMAT && bp->bio_cmd != FDBIO_RDSECTID) {
if (fd->flags & FD_NONBLOCK) {
bp->bio_error = EAGAIN;
bp->bio_flags |= BIO_ERROR;
goto bad;
}
if (bp->bio_offset < 0) {
printf(
"fd%d: fdstrat: bad request offset = %ju, bcount = %ld\n",
fdu, (intmax_t)bp->bio_offset, 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_offset >= ((off_t)128 << fd->ft->secsize) * fd->ft->size) {
bp->bio_error = EINVAL;
bp->bio_flags |= BIO_ERROR;
goto bad;
}
blknum = bp->bio_offset / fdblk;
nblocks = fd->ft->size;
if (blknum + bp->bio_bcount / fdblk > nblocks) {
if (blknum >= nblocks) {
if (bp->bio_cmd != BIO_READ) {
bp->bio_error = ENOSPC;
bp->bio_flags |= BIO_ERROR;
}
goto bad; /* not always bad, but EOF */
}
bp->bio_bcount = (nblocks - blknum) * fdblk;
}
bp->bio_pblkno = blknum;
s = splbio();
bioq_disksort(&fdc->head, bp);
untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */
devstat_start_transaction_bio(fd->device_stats, bp);
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);
}
/*
* fdc_intr
*
* 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);
}
/*
* Try figuring out the density of the media present in our device.
*/
static int
fdautoselect(struct cdev *dev)
{
fd_p fd;
struct fd_type *fdtp;
struct fdc_readid id;
int i, n, oopts, rv;
fd = dev->si_drv1;
switch (fd->type) {
default:
return (ENXIO);
case FDT_360K:
case FDT_720K:
/* no autoselection on those drives */
fd->ft = fd_native_types + fd->type;
return (0);
case FDT_12M:
fdtp = fd_searchlist_12m;
n = sizeof fd_searchlist_12m / sizeof(struct fd_type);
break;
case FDT_144M:
fdtp = fd_searchlist_144m;
n = sizeof fd_searchlist_144m / sizeof(struct fd_type);
break;
case FDT_288M:
fdtp = fd_searchlist_288m;
n = sizeof fd_searchlist_288m / sizeof(struct fd_type);
break;
}
/*
* Try reading sector ID fields, first at cylinder 0, head 0,
* then at cylinder 2, head N. We don't probe cylinder 1,
* since for 5.25in DD media in a HD drive, there are no data
* to read (2 step pulses per media cylinder required). For
* two-sided media, the second probe always goes to head 1, so
* we can tell them apart from single-sided media. As a
* side-effect this means that single-sided media should be
* mentioned in the search list after two-sided media of an
* otherwise identical density. Media with a different number
* of sectors per track but otherwise identical parameters
* cannot be distinguished at all.
*
* If we successfully read an ID field on both cylinders where
* the recorded values match our expectation, we are done.
* Otherwise, we try the next density entry from the table.
*
* Stepping to cylinder 2 has the side-effect of clearing the
* unit attention bit.
*/
oopts = fd->options;
fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
for (i = 0; i < n; i++, fdtp++) {
fd->ft = fdtp;
id.cyl = id.head = 0;
rv = fdmisccmd(dev, FDBIO_RDSECTID, &id);
if (rv != 0)
continue;
if (id.cyl != 0 || id.head != 0 ||
id.secshift != fdtp->secsize)
continue;
id.cyl = 2;
id.head = fd->ft->heads - 1;
rv = fdmisccmd(dev, FDBIO_RDSECTID, &id);
if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
id.secshift != fdtp->secsize)
continue;
if (rv == 0)
break;
}
fd->options = oopts;
if (i == n) {
if (bootverbose)
device_printf(fd->dev, "autoselection failed\n");
fd->ft = 0;
return (EIO);
} else {
if (bootverbose)
device_printf(fd->dev, "autoselected %d KB medium\n",
fd->ft->size / 2);
return (0);
}
}
/*
* The controller state machine.
*
* If it returns a non zero value, it should be called again immediately.
*/
static int
fdstate(fdc_p fdc)
{
struct fdc_readid *idp;
int read, format, rdsectid, cylinder, head, i, sec = 0, sectrac;
int st0, cyl, st3, idf, ne7cmd, mfm, steptrac;
unsigned long blknum;
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);
}
fd = bp->bio_dev->si_drv1;
fdu = fd->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;
mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
if (read)
idf = ISADMA_READ;
else
idf = ISADMA_WRITE;
format = bp->bio_cmd == FDBIO_FORMAT;
rdsectid = bp->bio_cmd == FDBIO_RDSECTID;
if (format)
finfo = (struct fd_formb *)bp->bio_data;
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); /* will return later */
}
/*
* Maybe if it's not starting, it SHOULD be starting.
*/
if (!(fd->flags & FD_MOTOR))
{
fdc->state = MOTORWAIT;
fd_turnon(fd);
return (0); /* will return later */
}
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;
return (1); /* will return immediately */
case DOSEEK:
blknum = bp->bio_pblkno + fd->skip / fdblk;
cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
if (cylinder == fd->track)
{
fdc->state = SEEKCOMPLETE;
return (1); /* will return immediately */
}
if (fd_cmd(fdc, 3, NE7CMD_SEEK,
fd->fdsu, cylinder * 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 */
blknum = bp->bio_pblkno + fd->skip / fdblk;
cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
/* Make sure seek really happened. */
if(fd->track == FD_NO_TRACK) {
int descyl = cylinder * 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); /* will return later */
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 = cylinder;
if (format)
fd->skip = (char *)&(finfo->fd_formb_cylno(0))
- (char *)finfo;
if (!rdsectid && !(fdc->flags & FDC_NODMA))
isa_dmastart(idf, bp->bio_data+fd->skip,
format ? bp->bio_bcount : fdblk, fdc->dmachan);
blknum = bp->bio_pblkno + fd->skip / fdblk;
sectrac = fd->ft->sectrac;
sec = blknum % (sectrac * fd->ft->heads);
head = sec / sectrac;
sec = sec % sectrac + 1;
if (head != 0 && fd->ft->offset_side2 != 0)
sec += fd->ft->offset_side2;
fd->hddrv = ((head&1)<<2)+fdu;
if(format || !(read || rdsectid))
{
/* 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); /* will return immediately */
}
}
if (format) {
ne7cmd = NE7CMD_FORMAT | mfm;
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, 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 (rdsectid) {
ne7cmd = NE7CMD_READID | mfm;
if (fd_cmd(fdc, 2, ne7cmd, head << 2 | fdu, 0)) {
/* controller jamming */
fdc->retry = 6;
return (retrier(fdc));
}
} else {
/* read or write operation */
ne7cmd = (read ? NE7CMD_READ | NE7CMD_SK : NE7CMD_WRITE) | mfm;
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,
ne7cmd,
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 (!rdsectid && (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)) {
if (!rdsectid && !(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 (!rdsectid && !(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.
*
* We normally restart this without bumping
* the retry counter. However, in case
* something is seriously messed up (like
* broken hardware), we rather limit the
* number of retries so the IO operation
* doesn't block indefinately.
*/
if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
fdc->state = SEEKCOMPLETE;
return (1);/* will return immediately */
} /* else fall through */
}
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 */
if (rdsectid) {
/* copy out ID field contents */
idp = (struct fdc_readid *)bp->bio_data;
idp->cyl = fdc->status[3];
idp->head = fdc->status[4];
idp->sec = fdc->status[5];
idp->secshift = fdc->status[6];
}
/* Operation successful, retry DMA overruns again next time. */
fdc->dma_overruns = 0;
fd->skip += fdblk;
if (!rdsectid && !format && fd->skip < bp->bio_bcount) {
/* set up next transfer */
fdc->state = DOSEEK;
} else {
/* ALL DONE */
fd->skip = 0;
bp->bio_resid = 0;
fdc->bp = NULL;
device_unbusy(fd->dev);
biofinish(bp, fd->device_stats, 0);
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
fdc->state = FINDWORK;
}
return (1); /* will return immediately */
case RESETCTLR:
fdc_reset(fdc);
fdc->retry++;
fdc->state = RESETCOMPLETE;
return (0); /* will return later */
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;
/* FALLTHROUGH */
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); /* will return later */
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 immediately */
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
fdc->state = DOSEEK;
return (1); /* will return immediately */
default:
device_printf(fdc->fdc_dev, "unexpected FD int->");
if (fd_read_status(fdc) == 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); /* will return later */
}
printf("ST0 = %x, PCN = %x\n", st0, cyl);
return (0); /* will return later */
}
/* noone should ever get here */
}
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? */
fd = bp->bio_dev->si_drv1;
fdu = fd->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:
if ((fd->options & FDOPT_NOERRLOG) == 0) {
disk_err(bp, "hard error",
fdc->fd->skip / DEV_BSIZE, 0);
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");
}
if ((fd->options & FDOPT_NOERROR) == 0) {
bp->bio_flags |= BIO_ERROR;
bp->bio_error = EIO;
bp->bio_resid = bp->bio_bcount - fdc->fd->skip;
} else
bp->bio_resid = 0;
fdc->bp = NULL;
fdc->fd->skip = 0;
device_unbusy(fd->dev);
biofinish(bp, fdc->fd->device_stats, 0);
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
fdmisccmd(struct cdev *dev, u_int cmd, void *data)
{
fdu_t fdu;
fd_p fd;
struct bio *bp;
struct fd_formb *finfo;
struct fdc_readid *idfield;
size_t fdblk;
int error;
fd = dev->si_drv1;
fdu = fd->fdu;
fdblk = 128 << fd->ft->secsize;
finfo = (struct fd_formb *)data;
idfield = (struct fdc_readid *)data;
bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
/*
* Set up a bio request for fdstrategy(). bio_offset is faked
* so that fdstrategy() will seek to the the requested
* cylinder, and use the desired head.
*/
bp->bio_cmd = cmd;
if (cmd == FDBIO_FORMAT) {
bp->bio_offset =
(finfo->cyl * (fd->ft->sectrac * fd->ft->heads) +
finfo->head * fd->ft->sectrac) * fdblk;
bp->bio_bcount = sizeof(struct fd_idfield_data) *
finfo->fd_formb_nsecs;
} else if (cmd == FDBIO_RDSECTID) {
bp->bio_offset =
(idfield->cyl * (fd->ft->sectrac * fd->ft->heads) +
idfield->head * fd->ft->sectrac) * fdblk;
bp->bio_bcount = sizeof(struct fdc_readid);
} else
panic("wrong cmd in fdmisccmd()");
bp->bio_data = data;
bp->bio_dev = dev;
bp->bio_done = fdbiodone;
bp->bio_flags = 0;
/* Now run the command. */
fdstrategy(bp);
error = biowait(bp, "fdcmd");
free(bp, M_TEMP);
return (error);
}
static int
fdioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
{
fdu_t fdu;
fd_p fd;
struct fdc_status *fsp;
struct fdc_readid *rid;
int error;
fd = dev->si_drv1;
fdu = fd->fdu;
/*
* First, handle everything that could be done with
* FD_NONBLOCK still being set.
*/
switch (cmd) {
case DIOCGMEDIASIZE:
if (fd->ft == 0)
return ((fd->flags & FD_NONBLOCK) ? EAGAIN : ENXIO);
*(off_t *)addr = (128 << (fd->ft->secsize)) * fd->ft->size;
return (0);
case DIOCGSECTORSIZE:
if (fd->ft == 0)
return ((fd->flags & FD_NONBLOCK) ? EAGAIN : ENXIO);
*(u_int *)addr = 128 << (fd->ft->secsize);
return (0);
case FIONBIO:
if (*(int *)addr != 0)
fd->flags |= FD_NONBLOCK;
else {
if (fd->ft == 0) {
/*
* No drive type has been selected yet,
* cannot turn FNONBLOCK off.
*/
return (EINVAL);
}
fd->flags &= ~FD_NONBLOCK;
}
return (0);
case FIOASYNC:
/* keep the generic fcntl() code happy */
return (0);
case FD_GTYPE: /* get drive type */
if (fd->ft == 0)
/* no type known yet, return the native type */
*(struct fd_type *)addr = fd_native_types[fd->type];
else
*(struct fd_type *)addr = *fd->ft;
return (0);
case FD_STYPE: /* set drive type */
/*
* Allow setting drive type temporarily iff
* currently unset. Used for fdformat so any
* user can set it, and then start formatting.
*/
if (fd->ft)
return (EINVAL); /* already set */
fd->fts[0] = *(struct fd_type *)addr;
fd->ft = &fd->fts[0];
fd->flags |= FD_UA;
return (0);
case FD_GOPTS: /* get drive options */
*(int *)addr = fd->options + FDOPT_AUTOSEL;
return (0);
case FD_SOPTS: /* set drive options */
fd->options = *(int *)addr & ~FDOPT_AUTOSEL;
return (0);
#ifdef FDC_DEBUG
case FD_DEBUG:
if ((fd_debug != 0) != (*(int *)addr != 0)) {
fd_debug = (*(int *)addr != 0);
printf("fd%d: debugging turned %s\n",
fd->fdu, fd_debug ? "on" : "off");
}
return (0);
#endif
case FD_CLRERR:
if (suser(td) != 0)
return (EPERM);
fd->fdc->fdc_errs = 0;
return (0);
case FD_GSTAT:
fsp = (struct fdc_status *)addr;
if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
return (EINVAL);
memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
return (0);
case FD_GDTYPE:
*(enum fd_drivetype *)addr = fd->type;
return (0);
}
/*
* Now handle everything else. Make sure we have a valid
* drive type.
*/
if (fd->flags & FD_NONBLOCK)
return (EAGAIN);
if (fd->ft == 0)
return (ENXIO);
error = 0;
switch (cmd) {
case FD_FORM:
if ((flag & FWRITE) == 0)
return (EBADF); /* must be opened for writing */
if (((struct fd_formb *)addr)->format_version !=
FD_FORMAT_VERSION)
return (EINVAL); /* wrong version of formatting prog */
error = fdmisccmd(dev, FDBIO_FORMAT, addr);
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(td) != 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;
#ifdef FDC_DEBUG
case FD_DEBUG:
if ((fd_debug != 0) != (*(int *)addr != 0)) {
fd_debug = (*(int *)addr != 0);
printf("fd%d: debugging turned %s\n",
fd->fdu, fd_debug ? "on" : "off");
}
break;
#endif
case FD_CLRERR:
if (suser(td) != 0)
return (EPERM);
fd->fdc->fdc_errs = 0;
break;
case FD_GSTAT:
fsp = (struct fdc_status *)addr;
if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
return (EINVAL);
memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
break;
case FD_READID:
rid = (struct fdc_readid *)addr;
if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD)
return (EINVAL);
error = fdmisccmd(dev, FDBIO_RDSECTID, addr);
break;
default:
error = ENOTTY;
break;
}
return (error);
}
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