fdio(7I) Ioctl Requests fdio(7I)
NAME
fdio - floppy disk control operations
SYNOPSIS
#include <sys/fdio.h>
DESCRIPTION
The Solaris floppy driver supports a set of ioctl(2) requests for getting 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 characteristics 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 inter-
face. The following defines are provided 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 charac-
teristics 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 command 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 ALSO
ioctl(2), dkio(7I), fd(7D), hdio(7I)
SunOS 5.10 26 April 2001 fdio(7I)