include/linux/fd.h

   1 #ifndef _LINUX_FD_H
   2 #define _LINUX_FD_H
   3
   4 #include <linux/ioctl.h>
   5 #include <linux/compiler.h>
   6
   7 /* New file layout: Now the ioctl definitions immediately follow the
   8  * definitions of the structures that they use */
   9
  10 /*
  11  * Geometry
  12  */
  13 struct floppy_struct {
  14         unsigned int    size,           /* nr of sectors total */
  15                         sect,           /* sectors per track */
  16                         head,           /* nr of heads */
  17                         track,          /* nr of tracks */
  18                         stretch;        /* bit 0 !=0 means double track steps */
  19                                         /* bit 1 != 0 means swap sides */
  20                                         /* bits 2..9 give the first sector */
  21                                         /*  number (the LSB is flipped) */
  22 #define FD_STRETCH 1
  23 #define FD_SWAPSIDES 2
  24 #define FD_ZEROBASED 4
  25 #define FD_SECTBASEMASK 0x3FC
  26 #define FD_MKSECTBASE(s) (((s) ^ 1) << 2)
  27 #define FD_SECTBASE(floppy) ((((floppy)->stretch & FD_SECTBASEMASK) >> 2) ^ 1)
  28
  29         unsigned char   gap,            /* gap1 size */
  30
  31                         rate,           /* data rate. |= 0x40 for perpendicular */
  32 #define FD_2M 0x4
  33 #define FD_SIZECODEMASK 0x38
  34 #define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8)
  35 #define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \
  36                              512 : 128 << FD_SIZECODE(floppy) )
  37 #define FD_PERP 0x40
  38
  39                         spec1,          /* stepping rate, head unload time */
  40                         fmt_gap;        /* gap2 size */
  41         const char      * name; /* used only for predefined formats */
  42 };
  43
  44
  45 /* commands needing write access have 0x40 set */
  46 /* commands needing super user access have 0x80 set */
  47
  48 #define FDCLRPRM _IO(2, 0x41)
  49 /* clear user-defined parameters */
  50
  51 #define FDSETPRM _IOW(2, 0x42, struct floppy_struct)
  52 #define FDSETMEDIAPRM FDSETPRM
  53 /* set user-defined parameters for current media */
  54
  55 #define FDDEFPRM _IOW(2, 0x43, struct floppy_struct)
  56 #define FDGETPRM _IOR(2, 0x04, struct floppy_struct)
  57 #define FDDEFMEDIAPRM FDDEFPRM
  58 #define FDGETMEDIAPRM FDGETPRM
  59 /* set/get disk parameters */
  60
  61
  62 #define FDMSGON  _IO(2,0x45)
  63 #define FDMSGOFF _IO(2,0x46)
  64 /* issue/don't issue kernel messages on media type change */
  65
  66
  67 /*
  68  * Formatting (obsolete)
  69  */
  70 #define FD_FILL_BYTE 0xF6 /* format fill byte. */
  71
  72 struct format_descr {
  73         unsigned int device,head,track;
  74 };
  75
  76 #define FDFMTBEG _IO(2,0x47)
  77 /* begin formatting a disk */
  78 #define FDFMTTRK _IOW(2,0x48, struct format_descr)
  79 /* format the specified track */
  80 #define FDFMTEND _IO(2,0x49)
  81 /* end formatting a disk */
  82
  83
  84 /*
  85  * Error thresholds
  86  */
  87 struct floppy_max_errors {
  88         unsigned int
  89           abort,      /* number of errors to be reached before aborting */
  90           read_track, /* maximal number of errors permitted to read an
  91                        * entire track at once */
  92           reset,      /* maximal number of errors before a reset is tried */
  93           recal,      /* maximal number of errors before a recalibrate is
  94                        * tried */
  95
  96           /*
  97            * Threshold for reporting FDC errors to the console.
  98            * Setting this to zero may flood your screen when using
  99            * ultra cheap floppies ;-)
 100            */
 101           reporting;
 102
 103 };
 104
 105 #define FDSETEMSGTRESH  _IO(2,0x4a)
 106 /* set fdc error reporting threshold */
 107
 108 #define FDFLUSH  _IO(2,0x4b)
 109 /* flush buffers for media; either for verifying media, or for
 110  * handling a media change without closing the file descriptor */
 111
 112 #define FDSETMAXERRS _IOW(2, 0x4c, struct floppy_max_errors)
 113 #define FDGETMAXERRS _IOR(2, 0x0e, struct floppy_max_errors)
 114 /* set/get abortion and read_track threshold. See also floppy_drive_params
 115  * structure */
 116
 117
 118 typedef char floppy_drive_name[16];
 119 #define FDGETDRVTYP _IOR(2, 0x0f, floppy_drive_name)
 120 /* get drive type: 5 1/4 or 3 1/2 */
 121
 122
 123 /*
 124  * Drive parameters (user modifiable)
 125  */
 126 struct floppy_drive_params {
 127         signed char cmos;               /* CMOS type */
 128
 129         /* Spec2 is (HLD<<1 | ND), where HLD is head load time (1=2ms, 2=4 ms
 130          * etc) and ND is set means no DMA. Hardcoded to 6 (HLD=6ms, use DMA).
 131          */
 132         unsigned long max_dtr;          /* Step rate, usec */
 133         unsigned long hlt;              /* Head load/settle time, msec */
 134         unsigned long hut;              /* Head unload time (remnant of
 135                                          * 8" drives) */
 136         unsigned long srt;              /* Step rate, usec */
 137
 138         unsigned long spinup;           /* time needed for spinup (expressed
 139                                          * in jiffies) */
 140         unsigned long spindown;         /* timeout needed for spindown */
 141         unsigned char spindown_offset;  /* decides in which position the disk
 142                                          * will stop */
 143         unsigned char select_delay;     /* delay to wait after select */
 144         unsigned char rps;              /* rotations per second */
 145         unsigned char tracks;           /* maximum number of tracks */
 146         unsigned long timeout;          /* timeout for interrupt requests */
 147
 148         unsigned char interleave_sect;  /* if there are more sectors, use
 149                                          * interleave */
 150
 151         struct floppy_max_errors max_errors;
 152
 153         char flags;                     /* various flags, including ftd_msg */
 154 /*
 155  * Announce successful media type detection and media information loss after
 156  * disk changes.
 157  * Also used to enable/disable printing of overrun warnings.
 158  */
 159
 160 #define FTD_MSG 0x10
 161 #define FD_BROKEN_DCL 0x20
 162 #define FD_DEBUG 0x02
 163 #define FD_SILENT_DCL_CLEAR 0x4
 164 #define FD_INVERTED_DCL 0x80 /* must be 0x80, because of hardware
 165                                 considerations */
 166
 167         char read_track;                /* use readtrack during probing? */
 168
 169 /*
 170  * Auto-detection. Each drive type has eight formats which are
 171  * used in succession to try to read the disk. If the FDC cannot lock onto
 172  * the disk, the next format is tried. This uses the variable 'probing'.
 173  */
 174         short autodetect[8];            /* autodetected formats */
 175
 176         int checkfreq; /* how often should the drive be checked for disk
 177                         * changes */
 178         int native_format; /* native format of this drive */
 179 };
 180
 181 enum {
 182         FD_NEED_TWADDLE_BIT,    /* more magic */
 183         FD_VERIFY_BIT,          /* inquire for write protection */
 184         FD_DISK_NEWCHANGE_BIT,  /* change detected, and no action undertaken yet
 185                                  * to clear media change status */
 186         FD_UNUSED_BIT,
 187         FD_DISK_CHANGED_BIT,    /* disk has been changed since last i/o */
 188         FD_DISK_WRITABLE_BIT    /* disk is writable */
 189 };
 190
 191 #define FDSETDRVPRM _IOW(2, 0x90, struct floppy_drive_params)
 192 #define FDGETDRVPRM _IOR(2, 0x11, struct floppy_drive_params)
 193 /* set/get drive parameters */
 194
 195
 196 /*
 197  * Current drive state (not directly modifiable by user, readonly)
 198  */
 199 struct floppy_drive_struct {
 200         unsigned long flags;
 201 /* values for these flags */
 202 #define FD_NEED_TWADDLE (1 << FD_NEED_TWADDLE_BIT)
 203 #define FD_VERIFY (1 << FD_VERIFY_BIT)
 204 #define FD_DISK_NEWCHANGE (1 << FD_DISK_NEWCHANGE_BIT)
 205 #define FD_DISK_CHANGED (1 << FD_DISK_CHANGED_BIT)
 206 #define FD_DISK_WRITABLE (1 << FD_DISK_WRITABLE_BIT)
 207
 208         unsigned long spinup_date;
 209         unsigned long select_date;
 210         unsigned long first_read_date;
 211         short probed_format;
 212         short track; /* current track */
 213         short maxblock; /* id of highest block read */
 214         short maxtrack; /* id of highest half track read */
 215         int generation; /* how many diskchanges? */
 216
 217 /*
 218  * (User-provided) media information is _not_ discarded after a media change
 219  * if the corresponding keep_data flag is non-zero. Positive values are
 220  * decremented after each probe.
 221  */
 222         int keep_data;
 223
 224         /* Prevent "aliased" accesses. */
 225         int fd_ref;
 226         int fd_device;
 227         unsigned long last_checked; /* when was the drive last checked for a disk
 228                            * change? */
 229
 230         char *dmabuf;
 231         int bufblocks;
 232 };
 233
 234 #define FDGETDRVSTAT _IOR(2, 0x12, struct floppy_drive_struct)
 235 #define FDPOLLDRVSTAT _IOR(2, 0x13, struct floppy_drive_struct)
 236 /* get drive state: GET returns the cached state, POLL polls for new state */
 237
 238
 239 /*
 240  * reset FDC
 241  */
 242 enum reset_mode {
 243         FD_RESET_IF_NEEDED,     /* reset only if the reset flags is set */
 244         FD_RESET_IF_RAWCMD,     /* obsolete */
 245         FD_RESET_ALWAYS         /* reset always */
 246 };
 247 #define FDRESET _IO(2, 0x54)
 248
 249
 250 /*
 251  * FDC state
 252  */
 253 struct floppy_fdc_state {
 254         int spec1;              /* spec1 value last used */
 255         int spec2;              /* spec2 value last used */
 256         int dtr;
 257         unsigned char version;  /* FDC version code */
 258         unsigned char dor;
 259         unsigned long address;  /* io address */
 260         unsigned int rawcmd:2;
 261         unsigned int reset:1;
 262         unsigned int need_configure:1;
 263         unsigned int perp_mode:2;
 264         unsigned int has_fifo:1;
 265         unsigned int driver_version;    /* version code for floppy driver */
 266 #define FD_DRIVER_VERSION 0x100
 267 /* user programs using the floppy API should use floppy_fdc_state to
 268  * get the version number of the floppy driver that they are running
 269  * on. If this version number is bigger than the one compiled into the
 270  * user program (the FD_DRIVER_VERSION define), it should be prepared
 271  * to bigger structures
 272  */
 273
 274         unsigned char track[4];
 275         /* Position of the heads of the 4 units attached to this FDC,
 276          * as stored on the FDC. In the future, the position as stored
 277          * on the FDC might not agree with the actual physical
 278          * position of these drive heads. By allowing such
 279          * disagreement, it will be possible to reset the FDC without
 280          * incurring the expensive cost of repositioning all heads.
 281          * Right now, these positions are hard wired to 0. */
 282
 283 };
 284
 285 #define FDGETFDCSTAT _IOR(2, 0x15, struct floppy_fdc_state)
 286
 287
 288 /*
 289  * Asynchronous Write error tracking
 290  */
 291 struct floppy_write_errors {
 292         /* Write error logging.
 293          *
 294          * These fields can be cleared with the FDWERRORCLR ioctl.
 295          * Only writes that were attempted but failed due to a physical media
 296          * error are logged.  write(2) calls that fail and return an error code
 297          * to the user process are not counted.
 298          */
 299
 300         unsigned int write_errors;  /* number of physical write errors
 301                                      * encountered */
 302
 303         /* position of first and last write errors */
 304         unsigned long first_error_sector;
 305         int           first_error_generation;
 306         unsigned long last_error_sector;
 307         int           last_error_generation;
 308
 309         unsigned int badness; /* highest retry count for a read or write
 310                                * operation */
 311 };
 312
 313 #define FDWERRORCLR  _IO(2, 0x56)
 314 /* clear write error and badness information */
 315 #define FDWERRORGET  _IOR(2, 0x17, struct floppy_write_errors)
 316 /* get write error and badness information */
 317
 318
 319 /*
 320  * Raw commands
 321  */
 322 /* new interface flag: now we can do them in batches */
 323 #define FDHAVEBATCHEDRAWCMD
 324
 325 struct floppy_raw_cmd {
 326         unsigned int flags;
 327 #define FD_RAW_READ 1
 328 #define FD_RAW_WRITE 2
 329 #define FD_RAW_NO_MOTOR 4
 330 #define FD_RAW_DISK_CHANGE 4 /* out: disk change flag was set */
 331 #define FD_RAW_INTR 8    /* wait for an interrupt */
 332 #define FD_RAW_SPIN 0x10 /* spin up the disk for this command */
 333 #define FD_RAW_NO_MOTOR_AFTER 0x20 /* switch the motor off after command
 334                                     * completion */
 335 #define FD_RAW_NEED_DISK 0x40  /* this command needs a disk to be present */
 336 #define FD_RAW_NEED_SEEK 0x80  /* this command uses an implied seek (soft) */
 337
 338 /* more "in" flags */
 339 #define FD_RAW_MORE 0x100  /* more records follow */
 340 #define FD_RAW_STOP_IF_FAILURE 0x200 /* stop if we encounter a failure */
 341 #define FD_RAW_STOP_IF_SUCCESS 0x400 /* stop if command successful */
 342 #define FD_RAW_SOFTFAILURE 0x800 /* consider the return value for failure
 343                                   * detection too */
 344
 345 /* more "out" flags */
 346 #define FD_RAW_FAILURE 0x10000 /* command sent to fdc, fdc returned error */
 347 #define FD_RAW_HARDFAILURE 0x20000 /* fdc had to be reset, or timed out */
 348
 349         void __user *data;
 350         char *kernel_data; /* location of data buffer in the kernel */
 351         struct floppy_raw_cmd *next; /* used for chaining of raw cmd's
 352                                       * within the kernel */
 353         long length; /* in: length of dma transfer. out: remaining bytes */
 354         long phys_length; /* physical length, if different from dma length */
 355         int buffer_length; /* length of allocated buffer */
 356
 357         unsigned char rate;
 358         unsigned char cmd_count;
 359         unsigned char cmd[16];
 360         unsigned char reply_count;
 361         unsigned char reply[16];
 362         int track;
 363         int resultcode;
 364
 365         int reserved1;
 366         int reserved2;
 367 };
 368
 369 #define FDRAWCMD _IO(2, 0x58)
 370 /* send a raw command to the fdc. Structure size not included, because of
 371  * batches */
 372
 373 #define FDTWADDLE _IO(2, 0x59)
 374 /* flicker motor-on bit before reading a sector. Experimental */
 375
 376
 377 #define FDEJECT _IO(2, 0x5a)
 378 /* eject the disk */
 379
 380 #endif