include/linux/fd.h

/* */
   1 #ifndef _LINUX_FD_H
   2 #define _LINUX_FD_H
   3 
   4 #define FDCLRPRM 0 /* clear user-defined parameters */
   5 #define FDSETPRM 1 /* set user-defined parameters for current media */
   6 #define FDSETMEDIAPRM 1
   7 #define FDDEFPRM 2 /* set user-defined parameters until explicitly cleared */
   8 #define FDDEFMEDIAPRM 2
   9 #define FDGETPRM 3 /* get disk parameters */
  10 #define FDGETMEDIAPRM 3
  11 #define FDMSGON  4 /* issue kernel messages on media type change */
  12 #define FDMSGOFF 5 /* don't issue kernel messages on media type change */
  13 #define FDFMTBEG 6 /* begin formatting a disk */
  14 #define FDFMTTRK 7 /* format the specified track */
  15 #define FDFMTEND 8 /* end formatting a disk */
  16 #define FDSETEMSGTRESH  10      /* set fdc error reporting threshold */
  17 #define FDFLUSH  11 /* flush buffers for media; either for verifying media, or for
  18                        handling a media change without closing the file
  19                        descriptor */
  20 #define FDSETMAXERRS 12 /* set abortion and read_track threshold */
  21 #define FDGETMAXERRS 14 /* get abortion and read_track threshold */
  22 #define FDGETDRVTYP 16          /* get drive type: 5 1/4 or 3 1/2 */
  23 
  24 #define FDSETDRVPRM 20 /* set drive parameters */
  25 #define FDGETDRVPRM 21 /* get drive parameters */
  26 #define FDGETDRVSTAT 22 /* get drive state */
  27 #define FDPOLLDRVSTAT 23 /* get drive state */
  28 #define FDGETFDCSTAT 25 /* get fdc state */
  29 #define FDWERRORCLR  27 /* clear write error and badness information */
  30 #define FDWERRORGET  28 /* get write error and badness information */
  31 
  32 #define FDRESET 24 /* reset FDC */
  33 #define FD_RESET_IF_NEEDED 0
  34 #define FD_RESET_IF_RAWCMD 1
  35 #define FD_RESET_ALWAYS 2
  36 
  37 #define FDBAILOUT 26 /* release all fdc locks */
  38 #define FD_CLEAR_RESET 0
  39 #define FD_COMPLETE_FORMAT 1
  40 #define FD_UNLOCK_FDC 2
  41 
  42 #define FDRAWCMD 30 /* send a raw command to the fdc */
  43 
  44 #define FDTWADDLE 40 /* flicker motor-on bit before reading a sector */
  45 
  46 /*
  47  * Maximum number of sectors in a track buffer. Track buffering is disabled
  48  * if tracks are bigger.
  49  */
  50 #define MAX_BUFFER_SECTORS 24 /* was 18 -bb */
  51 
  52 #define FD_FILL_BYTE 0xF6 /* format fill byte */
  53 
  54 #define FD_2M 0x4
  55 #define FD_SIZECODEMASK 0x38
  56 #define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8)
  57 #define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \
  58                              512 : 128 << FD_SIZECODE(floppy) )
  59 #define FD_PERP 0x40
  60 
  61 #ifndef ASSEMBLER
  62 struct floppy_struct {
  63         unsigned int    size,           /* nr of sectors total */
  64                         sect,           /* sectors per track */
  65                         head,           /* nr of heads */
  66                         track,          /* nr of tracks */
  67                         stretch;        /* !=0 means double track steps */
  68         unsigned char   gap,            /* gap1 size */
  69                         rate,           /* data rate. |= 0x40 for perpendicular */
  70                         spec1,          /* stepping rate, head unload time */
  71                         fmt_gap;        /* gap2 size */
  72         char          * name; /* used only for predefined formats */
  73 };
  74 
  75 struct format_descr {
  76         unsigned int device,head,track;
  77 };
  78 
  79 struct floppy_max_errors {
  80   unsigned int
  81           abort,      /* number of errors to be reached before aborting */
  82           read_track, /* maximal number of errors permitted to read an
  83                        * entire track at once */
  84           reset,      /* maximal number of errors before a reset is tried */
  85           recal,      /* maximal number of errors before a recalibrate is
  86                        * tried */
  87 
  88           /*
  89            * Threshold for reporting FDC errors to the console.
  90            * Setting this to zero may flood your screen when using
  91            * ultra cheap floppies ;-)
  92            */
  93           reporting;
  94 
  95 };
  96 
  97 struct floppy_drive_params {
  98   char cmos;                    /* cmos type */
  99 
 100   /* Spec2 is (HLD<<1 | ND), where HLD is head load time (1=2ms, 2=4 ms etc)
 101    * and ND is set means no DMA. Hardcoded to 6 (HLD=6ms, use DMA).
 102    */
 103   unsigned long max_dtr;        /* Step rate, usec */
 104   unsigned long hlt;            /* Head load/settle time, msec */
 105   unsigned long hut;            /* Head unload time (remnant of 8" drives) */
 106   unsigned long srt;            /* Step rate, usec */
 107 
 108   unsigned long spinup;         /* time needed for spinup ( in jiffies) */
 109   unsigned long spindown;       /* timeout needed for spindown */
 110   unsigned char spindown_offset;/* decides in which position the disk
 111                                  * will stop */
 112   unsigned char select_delay;   /* delay to wait after select */
 113   unsigned char rps;            /* rotations per second */
 114   unsigned char tracks;         /* maximum number of tracks */
 115   unsigned long timeout;        /* timeout for interrupt requests */
 116 
 117   unsigned char interleave_sect;/* if there are more sectors, use interleave */
 118 
 119   struct floppy_max_errors max_errors;
 120 
 121   char flags;                   /* various flags, including ftd_msg */
 122 /*
 123  * Announce successful media type detection and media information loss after
 124  * disk changes.
 125  * Also used to enable/disable printing of overrun warnings.
 126  */
 127 #define FTD_MSG 0x10
 128 
 129   char read_track;              /* use readtrack during probing? */
 130 
 131 /*
 132  * Auto-detection. Each drive type has eight formats which are
 133  * used in succession to try to read the disk. If the FDC cannot lock onto
 134  * the disk, the next format is tried. This uses the variable 'probing'.
 135  */
 136   short autodetect[8];          /* autodetected formats */
 137 
 138   int checkfreq; /* how often should the drive be checked for disk changes */
 139   int native_format; /* native format of this drive */
 140 };
 141 
 142 struct floppy_drive_struct {
 143   signed char flags;
 144 
 145 /* values for these flags */
 146 #define FD_NEED_TWADDLE 1 /* more magic */
 147 #define FD_VERIFY 2 /* this is set at bootup to force an initial drive status
 148                    inquiry*/
 149 #define FD_DISK_NEWCHANGE 4 /* change detected, and no action undertaken yet to
 150                             clear media change status */
 151 #define FD_DRIVE_PRESENT 8
 152 #define FD_DISK_WRITABLE 32
 153 
 154   unsigned long volatile spinup_date;
 155   unsigned long volatile select_date;
 156   unsigned long volatile first_read_date;
 157   short probed_format;
 158   short track; /* current track */
 159   short maxblock; /* id of highest block read */
 160   short maxtrack; /* id of highest half track read */
 161   int generation; /* how many diskchanges? */
 162 
 163 /*
 164  * (User-provided) media information is _not_ discarded after a media change
 165  * if the corresponding keep_data flag is non-zero. Positive values are
 166  * decremented after each probe.
 167  */
 168   int keep_data;
 169 
 170   /* Prevent "aliased" accesses. */
 171   int fd_ref;
 172   int fd_device;
 173   int last_checked; /* when was the drive last checked for a disk change? */
 174 
 175 
 176 };
 177 
 178 struct floppy_write_errors {
 179   /* Write error logging.
 180    *
 181    * These fields can be cleared with the FDWERRORCLR ioctl.
 182    * Only writes that were attempted but failed due to a physical media
 183    * error are logged.  write(2) calls that fail and return an error code
 184    * to the user process are not counted.
 185    */
 186 
 187   unsigned int write_errors;  /* number of physical write errors encountered */
 188 
 189   /* position of first and last write errors */
 190   unsigned long first_error_sector;
 191   int           first_error_generation;
 192   unsigned long last_error_sector;
 193   int           last_error_generation;
 194 
 195   unsigned int badness; /* highest retry count for a read or write operation */
 196 };
 197 
 198 struct floppy_fdc_state {       
 199         int spec1; /* spec1 value last used */
 200         int spec2; /* spec2 value last used */
 201         int dtr;
 202         unsigned char version;  /* FDC version code */
 203         unsigned char dor;
 204         int address; /* io address */
 205         unsigned int rawcmd:2;
 206         unsigned int reset:1;
 207         unsigned int need_configure:1;
 208         unsigned int perp_mode:2;
 209         unsigned int has_fifo:1;
 210 };
 211 
 212 struct floppy_raw_cmd {
 213   void *data;
 214   long length;
 215 
 216   unsigned char rate;
 217   unsigned char flags;
 218   unsigned char cmd_count;
 219   unsigned char cmd[9];
 220   unsigned char reply_count;
 221   unsigned char reply[7];
 222   int track;
 223 };
 224 #endif
 225 
 226 /* meaning of the various bytes */
 227 
 228 /* flags */
 229 #define FD_RAW_READ 1
 230 #define FD_RAW_WRITE 2
 231 #define FD_RAW_NO_MOTOR 4
 232 #define FD_RAW_DISK_CHANGE 4
 233 #define FD_RAW_INTR 8
 234 #define FD_RAW_SPIN 16
 235 #define FD_RAW_NO_MOTOR_AFTER 32
 236 #define FD_RAW_NEED_DISK 64
 237 #define FD_RAW_NEED_SEEK 128
 238 
 239 #endif
/* */
root/include/linux/fd.h

INCLUDED FROM
