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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)

Index

NAME

SYNOPSIS

DESCRIPTION

IOCTLS

SEE ALSO

Партнёры:

Хостинг: