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