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Copyright (c) 2001, Sun Microsystems, Inc. All Rights Reserved
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
FDIO 7I "Apr 26, 2001"
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 interface. 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 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 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)