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fdio(7i) [osx man page]

fdio(7I)							  Ioctl Requests							  fdio(7I)

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)
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