The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/fdcio.h

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    1 /*
    2  * Copyright (C) 1992-1994,2001 by Joerg Wunsch, Dresden
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY
   15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   19  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
   20  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
   21  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   22  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
   24  * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
   25  * DAMAGE.
   26  *
   27  * $FreeBSD: releng/5.1/sys/sys/fdcio.h 87992 2001-12-15 19:09:04Z joerg $
   28  */
   29 
   30 #ifndef _MACHINE_IOCTL_FD_H_
   31 #define _MACHINE_IOCTL_FD_H_
   32 
   33 #ifndef _KERNEL
   34 #include <sys/types.h>
   35 #endif
   36 #include <sys/ioccom.h>
   37 
   38 #define FD_FORMAT_VERSION 110   /* used to validate before formatting */
   39 #define FD_MAX_NSEC 36          /* highest known number of spt - allow for */
   40                                 /* 2.88 MB drives */
   41 
   42 struct fd_formb {
   43         int format_version;     /* == FD_FORMAT_VERSION */
   44         int cyl, head;
   45         int transfer_rate;      /* FDC_???KBPS */
   46 
   47         union {
   48                 struct fd_form_data {
   49                         /*
   50                          * DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
   51                          * it is hardware-dependent since it exactly
   52                          * matches the byte sequence to write to FDC
   53                          * during its `format track' operation
   54                          */
   55                         u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */
   56                         u_char nsecs;   /* must be <= FD_MAX_NSEC */
   57                         u_char gaplen;  /* GAP 3 length; usually 84 */
   58                         u_char fillbyte; /* usually 0xf6 */
   59                         struct fd_idfield_data {
   60                                 /*
   61                                  * data to write into id fields;
   62                                  * for obscure formats, they mustn't match
   63                                  * the real values (but mostly do)
   64                                  */
   65                                 u_char cylno;   /* 0 thru 79 (or 39) */
   66                                 u_char headno;  /* 0, or 1 */
   67                                 u_char secno;   /* starting at 1! */
   68                                 u_char secsize; /* usually 2 */
   69                         } idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
   70                 } structured;
   71                 u_char raw[1];  /* to have continuous indexed access */
   72         } format_info;
   73 };
   74 
   75 /* make life easier */
   76 # define fd_formb_secshift   format_info.structured.secshift
   77 # define fd_formb_nsecs      format_info.structured.nsecs
   78 # define fd_formb_gaplen     format_info.structured.gaplen
   79 # define fd_formb_fillbyte   format_info.structured.fillbyte
   80 /* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
   81 # define fd_formb_cylno(i)   format_info.structured.idfields[i].cylno
   82 # define fd_formb_headno(i)  format_info.structured.idfields[i].headno
   83 # define fd_formb_secno(i)   format_info.structured.idfields[i].secno
   84 # define fd_formb_secsize(i) format_info.structured.idfields[i].secsize
   85 
   86 struct fd_type {
   87         int     sectrac;                /* sectors per track         */
   88         int     secsize;                /* size code for sectors     */
   89         int     datalen;                /* data len when secsize = 0 */
   90         int     gap;                    /* gap len between sectors   */
   91         int     tracks;                 /* total number of cylinders */
   92         int     size;                   /* size of disk in sectors   */
   93         int     trans;                  /* transfer speed code       */
   94         int     heads;                  /* number of heads           */
   95         int     f_gap;                  /* format gap len            */
   96         int     f_inter;                /* format interleave factor  */
   97         int     offset_side2;           /* offset of sectors on side2 */
   98         int     flags;                  /* misc. features */
   99 #define FL_MFM          0x0001          /* MFM recording */
  100 #define FL_2STEP        0x0002          /* 2 steps between cylinders */
  101 #define FL_PERPND       0x0004          /* perpendicular recording */
  102 };
  103 
  104 struct fdc_status {
  105         u_int   status[7];
  106 };
  107 
  108 /*
  109  * cyl and head are being passed into ioctl(FD_READID)
  110  * all four fields are being returned
  111  */
  112 struct fdc_readid {
  113         u_char  cyl;            /* C - 0...79 */
  114         u_char  head;           /* H - 0...1 */
  115         u_char  sec;            /* R - 1...n */
  116         u_char  secshift;       /* N - log2(secsize / 128) */
  117 };
  118 
  119 /*
  120  * Diskette drive type, basically the same as stored in RTC on ISA
  121  * machines (see /sys/isa/rtc.h), but right-shifted by four bits.
  122  */
  123 enum fd_drivetype {
  124         FDT_NONE, FDT_360K, FDT_12M, FDT_720K, FDT_144M, FDT_288M_1,
  125         FDT_288M
  126 };
  127 
  128 
  129 #define FD_FORM   _IOW('F', 61, struct fd_formb) /* format a track */
  130 #define FD_GTYPE  _IOR('F', 62, struct fd_type)  /* get drive type */
  131 #define FD_STYPE  _IOW('F', 63, struct fd_type)  /* set drive type */
  132 
  133 #define FD_GOPTS  _IOR('F', 64, int) /* drive options, see below */
  134 #define FD_SOPTS  _IOW('F', 65, int)
  135 
  136 #define FD_DEBUG  _IOW('F', 66, int)
  137 
  138 #define FD_CLRERR _IO('F', 67)  /* clear error counter */
  139 
  140 #define FD_READID _IOWR('F', 68, struct fdc_readid) /* read ID field */
  141 
  142 /*
  143  * Obtain NE765 status registers.  Only successful if there is
  144  * a valid status stored in fdc->status[].
  145  */
  146 #define FD_GSTAT  _IOR('F', 69, struct fdc_status)
  147 
  148 #define FD_GDTYPE _IOR('F', 70, enum fd_drivetype) /* obtain drive type */
  149 
  150 /* Options for FD_GOPTS/FD_SOPTS, cleared on device close */
  151 #define FDOPT_NORETRY 0x0001    /* no retries on failure */
  152 #define FDOPT_NOERRLOG 0x002    /* no "hard error" kernel log messages */
  153 #define FDOPT_NOERROR 0x0004    /* do not indicate errors, caller will use
  154                                    FD_GSTAT in order to obtain status */
  155 #define FDOPT_AUTOSEL 0x8000    /* read/only option: device performs media
  156                                  * autoselection */
  157 
  158 /*
  159  * Transfer rate definitions.  Used in the structures above.  They
  160  * represent the hardware encoding of bits 0 and 1 of the FDC control
  161  * register when writing to the register.
  162  * Transfer rates for FM encoding are half the values listed here
  163  * (but we currently don't support FM encoding).
  164  */
  165 #define FDC_500KBPS     0x00    /* 500KBPS MFM drive transfer rate */
  166 #define FDC_300KBPS     0x01    /* 300KBPS MFM drive transfer rate */
  167 #define FDC_250KBPS     0x02    /* 250KBPS MFM drive transfer rate */
  168 #define FDC_1MBPS       0x03    /* 1MPBS MFM drive transfer rate */
  169 
  170 #endif /* !_MACHINE_IOCTL_FD_H_ */

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