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