fdio(7I) Ioctl Requests fdio(7I)NAMEfdio - floppy disk control operations
SYNOPSIS
#include <sys/fdio.h>
DESCRIPTION
The Solaris floppy driver supports a set of ioctl(2) requests for get‐
ting and setting the floppy drive characteristics. Basic to these
ioctl() requests are the definitions in <sys/fdio.h>.
IOCTLS
The following ioctl() requests are available on the Solaris floppy
driver.
FDDEFGEOCHAR x86 based systems: This ioctl() forces the floppy
driver to restore the diskette and drive characteris‐
tics and geometry, and partition information to default
values based on the device configuration.
FDGETCHANGE The argument is a pointer to an int. This ioctl()
returns the status of the diskette-changed signal from
the floppy interface. The following defines are pro‐
vided for cohesion.
Note: For x86 based systems, use FDGC_DETECTED (which is available only
on x86 based systems) instead of FDGC_HISTORY.
/*
* Used by FDGETCHANGE, returned state of the sense disk change bit.
*/
#define FDGC_HISTORY 0x01 /* disk has changed since insertion or
last FDGETCHANGE call */
#define FDGC_CURRENT 0x02 /* if set, indicates drive has floppy,
> otherwise, drive is empty */
#define FDGC_CURWPROT 0x10 /* current state of write protect */
#define FDGC_DETECTED 0x20 /* previous state of DISK CHANGE */
FDIOGCHAR The argument is a pointer to an fd_char structure
(described below). This ioctl() gets the characteristics
of the floppy diskette from the floppy controller.
FDIOSCHAR The argument is a pointer to an fd_char structure
(described below). This ioctl() sets the characteristics
of the floppy diskette for the floppy controller. Typical
values in the fd_char structure for a high density
diskette:
field value
fdc_medium 0
fdc_transfer_rate 500
fdc_ncyl 80
fdc_nhead 2
fdc_sec_size 512
fdc_secptrack 18
fdc_steps -1 { This field doesn't apply. }
/*
* Floppy characteristics
*/
struct fd_char {
uchar_t fdc_medium; /* equals 1 if floppy is medium density format */
int fdc_transfer_rate; /* transfer rate */
int fdc_ncyl; /* number of cylinders */
int fdc_nhead; /* number of heads */
int fdc_sec_size; /* sector size */
int fdc_secptrack; /* sectors per track */
int fdc_steps; /* no. of steps per data track */
};
FDGETDRIVECHAR The argument to this ioctl() is a pointer to an
fd_drive structure (described below). This ioctl()
gets the characteristics of the floppy drive from the
floppy controller.
FDSETDRIVECHAR x86 based systems: The argument to this ioctl() is a
pointer to an fd_drive structure (described below).
This ioctl() sets the characteristics of the floppy
drive for the floppy controller. Only fdd_steprate,
fdd_headsettle, fdd_motoron, and fdd_motoroff are
actually used by the floppy disk driver.
/*
* Floppy Drive characteristics
*/
struct fd_drive {
int fdd_ejectable; /* does the drive support eject? */
int fdd_maxsearch; /* size of per-unit search table */
int fdd_writeprecomp; /* cyl to start write precompensation */
int fdd_writereduce; /* cyl to start recucing write current */
int fdd_stepwidth; /* width of step pulse in 1 us units */
int fdd_steprate; /* step rate in 100 us units */
int fdd_headsettle; /* delay, in 100 us units */
int fdd_headload; /* delay, in 100 us units */
int fdd_headunload; /* delay, in 100 us units */
int fdd_motoron; /* delay, in 100 ms units */
int fdd_motoroff; /* delay, in 100 ms units */
int fdd_precomplevel; /* bit shift, in nano-secs */
int fdd_pins; /* defines meaning of pin 1, 2, 4 and 34 */
int fdd_flags; /* TRUE READY, Starting Sector #, & Motor On */
};
FDGETSEARCH Not available.
FDSETSEARCH Not available.
FDEJECT SPARC: This ioctl() requests the floppy drive to eject
the diskette.
FDIOCMD The argument is a pointer to an fd_cmd structure
(described below). This ioctl() allows access to the
floppy diskette using the floppy device driver. Only
the FDCMD_WRITE, FDCMD_READ, and FDCMD_FORMAT_TRACK
commands are currently available.
struct fd_cmd {
ushort_t fdc_cmd; /* command to be executed */
int fdc_flags; /* execution flags (x86 only) */
daddr_t fdc_blkno; /* disk address for command */
int fdc_secnt; /* sector count for command */
caddr_t fdc_bufaddr; /* user's buffer address */
uint_t fdc_buflen; /* size of user's buffer */
};
Please note that the fdc_buflen field is currently unused. The
fdc_secnt field is used to calculate the transfer size, and the buffer
is assumed to be large enough to accommodate the transfer.
{
/*
* Floppy commands
*/
#define FDCMD_WRITE 1
#define FDCMD_READ 2
#define FDCMD_SEEK 3
#define FDCMD_REZERO 4
#define FDCMD_FORMAT_UNIT 5
#define FDCMD_FORMAT_TRACK 6
};
FDRAW The argument is a pointer to an fd_raw structure (described
below). This ioctl() allows direct control of the floppy
drive using the floppy controller. Refer to the appropriate
floppy-controller data sheet for full details on required com‐
mand bytes and returned result bytes. The following commands
are supported.
/*
* Floppy raw commands
*/
#define FDRAW_SPECIFY 0x03
#define FDRAW_READID 0x0a (x86 only)
#define FDRAW_SENSE_DRV 0x04
#define FDRAW_REZERO 0x07
#define FDRAW_SEEK 0x0f
#define FDRAW_SENSE_INT 0x08 (x86 only)
#define FDRAW_FORMAT 0x0d
#define FDRAW_READTRACK 0x02
#define FDRAW_WRCMD 0x05
#define FDRAW_RDCMD 0x06
#define FDRAW_WRITEDEL 0x09
#define FDRAW_READDEL 0x0c
Please note that when using FDRAW_SEEK or FDRAW_REZERO, the driver
automatically issues a FDRAW_SENSE_INT command to clear the interrupt
from the FDRAW_SEEK or the FDRAW_REZERO. The result bytes returned by
these commands are the results from the FDRAW_SENSE_INT command.
Please see the floppy-controller data sheet for more details on
FDRAW_SENSE_INT.
/*
* Used by FDRAW
*/
struct fd_raw {
char fdr_cmd[10]; /* user-supplied command bytes */
short fdr_cnum; /* number of command bytes */
char fdr_result[10]; /* controller-supplied result bytes */
ushort_t fdr_nbytes; /* number to transfer if read/write command */
char *fdr_addr; /* where to transfer if read/write command */
};
SEE ALSOioctl(2), dkio(7I), fd(7D), hdio(7I)SunOS 5.11 26 April 2001 fdio(7I)