freebsd-dev/sys/i386/include/ioctl_fd.h
1993-12-21 05:11:10 +00:00

88 lines
3.0 KiB
C

/*
* 386BSD:
* format a floppy disk
*
* First, totally uncomfortable and unreliable version.
* USE AT YOUR OWN RISK. NEITHER KIND OF WARRANTY OR LIABILITY.
* No complaints about "lost data", "destroyed diskette", "blown
* controllers" or so are accepted.
*
* Detailed bug reports, bug fixes, and suggestions are welcome.
* Author & Copyright:
* (c) 1992, 1993 Joerg Wunsch, Dresden
* joerg_wunsch@uriah.sax.de
*/
#ifndef _IOCTL_FD_H
#define _IOCTL_FD_H
#include <sys/types.h>
#include <sys/ioctl.h>
#define FD_FORMAT_VERSION 110 /* used to validate before formatting */
#define FD_MAX_NSEC 36 /* highest known number of spt - allow for */
/* 2.88 MB drives */
struct fd_formb {
int format_version; /* == FD_FORMAT_VERSION */
int cyl, head;
int transfer_rate; /* fdreg.h: FDC_???KBPS */
union {
struct fd_form_data {
/*
* DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
* it is hardware-dependant since it exactly
* matches the byte sequence to write to FDC
* during its `format track' operation
*/
u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */
u_char nsecs; /* must be <= FD_MAX_NSEC */
u_char gaplen; /* GAP 3 length; usually 84 */
u_char fillbyte; /* usually 0xf6 */
struct fd_idfield_data {
/*
* data to write into id fields;
* for obscure formats, they mustn't match
* the real values (but mostly do)
*/
u_char cylno; /* 0 thru 79 (or 39) */
u_char headno; /* 0, or 1 */
u_char secno; /* starting at 1! */
u_char secsize; /* usually 2 */
} idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
} structured;
u_char raw[1]; /* to have continuous indexed access */
} format_info;
};
/* make life easier */
# define fd_formb_secshift format_info.structured.secshift
# define fd_formb_nsecs format_info.structured.nsecs
# define fd_formb_gaplen format_info.structured.gaplen
# define fd_formb_fillbyte format_info.structured.fillbyte
/* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
# define fd_formb_cylno(i) format_info.structured.idfields[i].cylno
# define fd_formb_headno(i) format_info.structured.idfields[i].headno
# define fd_formb_secno(i) format_info.structured.idfields[i].secno
# define fd_formb_secsize(i) format_info.structured.idfields[i].secsize
struct fd_type {
int sectrac; /* sectors per track */
int secsize; /* size code for sectors */
int datalen; /* data len when secsize = 0 */
int gap; /* gap len between sectors */
int tracks; /* total num of tracks */
int size; /* size of disk in sectors */
int steptrac; /* steps per cylinder */
int trans; /* transfer speed code */
int heads; /* number of heads */
int f_gap; /* format gap len */
int f_inter; /* format interleave factor */
};
#define FD_FORM _IOW('F', 61, struct fd_formb) /* format a track */
#define FD_GTYPE _IOR('F', 62, struct fd_type) /* get drive type */
#endif /* !def _IOCTL_FD_H */