#ifndef _UAPI_LINUX_FD_H
  #define _UAPI_LINUX_FD_H
  
  #include <linux/ioctl.h>
  #include <linux/compiler.h>
  
  /* New file layout: Now the ioctl definitions immediately follow the
   * definitions of the structures that they use */
  
  /*
   * Geometry
   */
  struct floppy_struct {
  	unsigned int	size,		/* nr of sectors total */
  			sect,		/* sectors per track */
  			head,		/* nr of heads */
  			track,		/* nr of tracks */
  			stretch;	/* bit 0 !=0 means double track steps */
  					/* bit 1 != 0 means swap sides */
  					/* bits 2..9 give the first sector */
  					/*  number (the LSB is flipped) */
  #define FD_STRETCH 1
  #define FD_SWAPSIDES 2
  #define FD_ZEROBASED 4
  #define FD_SECTBASEMASK 0x3FC
  #define FD_MKSECTBASE(s) (((s) ^ 1) << 2)
  #define FD_SECTBASE(floppy) ((((floppy)->stretch & FD_SECTBASEMASK) >> 2) ^ 1)
  
  	unsigned char	gap,		/* gap1 size */
  
  			rate,		/* data rate. |= 0x40 for perpendicular */
  #define FD_2M 0x4
  #define FD_SIZECODEMASK 0x38
  #define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8)
  #define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \
  			     512 : 128 << FD_SIZECODE(floppy) )
  #define FD_PERP 0x40
  
  			spec1,		/* stepping rate, head unload time */
  			fmt_gap;	/* gap2 size */
  	const char	* name; /* used only for predefined formats */
  };
  
  
  /* commands needing write access have 0x40 set */
  /* commands needing super user access have 0x80 set */
  
  #define FDCLRPRM _IO(2, 0x41)
  /* clear user-defined parameters */
  
  #define FDSETPRM _IOW(2, 0x42, struct floppy_struct) 
  #define FDSETMEDIAPRM FDSETPRM
  /* set user-defined parameters for current media */
  
  #define FDDEFPRM _IOW(2, 0x43, struct floppy_struct) 
  #define FDGETPRM _IOR(2, 0x04, struct floppy_struct)
  #define FDDEFMEDIAPRM FDDEFPRM
  #define FDGETMEDIAPRM FDGETPRM
  /* set/get disk parameters */
  
  
  #define	FDMSGON  _IO(2,0x45)
  #define	FDMSGOFF _IO(2,0x46)
  /* issue/don't issue kernel messages on media type change */
  
  
  /* 
   * Formatting (obsolete)
   */
  #define FD_FILL_BYTE 0xF6 /* format fill byte. */
  
  struct format_descr {
  	unsigned int device,head,track;
  };
  
  #define FDFMTBEG _IO(2,0x47)
  /* begin formatting a disk */
  #define	FDFMTTRK _IOW(2,0x48, struct format_descr)
  /* format the specified track */
  #define FDFMTEND _IO(2,0x49)
  /* end formatting a disk */
  
  
  /*
   * Error thresholds
   */
  struct floppy_max_errors {
  	unsigned int
  	  abort,      /* number of errors to be reached before aborting */
  	  read_track, /* maximal number of errors permitted to read an
  		       * entire track at once */
  	  reset,      /* maximal number of errors before a reset is tried */
  	  recal,      /* maximal number of errors before a recalibrate is
  		       * tried */
  
  	  /*
  	   * Threshold for reporting FDC errors to the console.
  	   * Setting this to zero may flood your screen when using
  	   * ultra cheap floppies ;-)
  	   */
  	  reporting;
  
  };
  
  #define FDSETEMSGTRESH	_IO(2,0x4a)
  /* set fdc error reporting threshold */
  
  #define FDFLUSH  _IO(2,0x4b)
  /* flush buffers for media; either for verifying media, or for
   * handling a media change without closing the file descriptor */
  
  #define FDSETMAXERRS _IOW(2, 0x4c, struct floppy_max_errors)
  #define FDGETMAXERRS _IOR(2, 0x0e, struct floppy_max_errors)
  /* set/get abortion and read_track threshold. See also floppy_drive_params
   * structure */
  
  
  typedef char floppy_drive_name[16];
  #define FDGETDRVTYP _IOR(2, 0x0f, floppy_drive_name)
  /* get drive type: 5 1/4 or 3 1/2 */
  
  
  /*
   * Drive parameters (user modifiable)
   */
  struct floppy_drive_params {
  	signed char cmos;		/* CMOS type */
  	
  	/* Spec2 is (HLD<<1 | ND), where HLD is head load time (1=2ms, 2=4 ms 
  	 * etc) and ND is set means no DMA. Hardcoded to 6 (HLD=6ms, use DMA).
  	 */
  	unsigned long max_dtr;		/* Step rate, usec */
  	unsigned long hlt;     		/* Head load/settle time, msec */
  	unsigned long hut;     		/* Head unload time (remnant of 
  					 * 8" drives) */
  	unsigned long srt;     		/* Step rate, usec */
  
  	unsigned long spinup;		/* time needed for spinup (expressed
  					 * in jiffies) */
  	unsigned long spindown;		/* timeout needed for spindown */
  	unsigned char spindown_offset;	/* decides in which position the disk
  					 * will stop */
  	unsigned char select_delay;	/* delay to wait after select */
  	unsigned char rps;		/* rotations per second */
  	unsigned char tracks;		/* maximum number of tracks */
  	unsigned long timeout;		/* timeout for interrupt requests */
  	
  	unsigned char interleave_sect;	/* if there are more sectors, use 
  					 * interleave */
  	
  	struct floppy_max_errors max_errors;
  	
  	char flags;			/* various flags, including ftd_msg */
  /*
   * Announce successful media type detection and media information loss after
   * disk changes.
   * Also used to enable/disable printing of overrun warnings.
   */
  
  #define FTD_MSG 0x10
  #define FD_BROKEN_DCL 0x20
  #define FD_DEBUG 0x02
  #define FD_SILENT_DCL_CLEAR 0x4
  #define FD_INVERTED_DCL 0x80 /* must be 0x80, because of hardware 
  				considerations */
  
  	char read_track;		/* use readtrack during probing? */
  
  /*
   * Auto-detection. Each drive type has eight formats which are
   * used in succession to try to read the disk. If the FDC cannot lock onto
   * the disk, the next format is tried. This uses the variable 'probing'.
   */
  	short autodetect[8];		/* autodetected formats */
  	
  	int checkfreq; /* how often should the drive be checked for disk 
  			* changes */
  	int native_format; /* native format of this drive */
  };
  
  enum {
  	FD_NEED_TWADDLE_BIT,	/* more magic */
  	FD_VERIFY_BIT,		/* inquire for write protection */
  	FD_DISK_NEWCHANGE_BIT,	/* change detected, and no action undertaken yet
  				 * to clear media change status */
  	FD_UNUSED_BIT,
  	FD_DISK_CHANGED_BIT,	/* disk has been changed since last i/o */
  	FD_DISK_WRITABLE_BIT,	/* disk is writable */
  	FD_OPEN_SHOULD_FAIL_BIT
  };
  
  #define FDSETDRVPRM _IOW(2, 0x90, struct floppy_drive_params)
  #define FDGETDRVPRM _IOR(2, 0x11, struct floppy_drive_params)
  /* set/get drive parameters */
  
  
  /*
   * Current drive state (not directly modifiable by user, readonly)
   */
  struct floppy_drive_struct {
  	unsigned long flags;
  /* values for these flags */
  #define FD_NEED_TWADDLE (1 << FD_NEED_TWADDLE_BIT)
  #define FD_VERIFY (1 << FD_VERIFY_BIT)
  #define FD_DISK_NEWCHANGE (1 << FD_DISK_NEWCHANGE_BIT)
  #define FD_DISK_CHANGED (1 << FD_DISK_CHANGED_BIT)
  #define FD_DISK_WRITABLE (1 << FD_DISK_WRITABLE_BIT)
  
  	unsigned long spinup_date;
  	unsigned long select_date;
  	unsigned long first_read_date;
  	short probed_format;
  	short track; /* current track */
  	short maxblock; /* id of highest block read */
  	short maxtrack; /* id of highest half track read */
  	int generation; /* how many diskchanges? */
  
  /*
   * (User-provided) media information is _not_ discarded after a media change
   * if the corresponding keep_data flag is non-zero. Positive values are
   * decremented after each probe.
   */
  	int keep_data;
  	
  	/* Prevent "aliased" accesses. */
  	int fd_ref;
  	int fd_device;
  	unsigned long last_checked; /* when was the drive last checked for a disk 
  			   * change? */
  	
  	char *dmabuf;
  	int bufblocks;
  };
  
  #define FDGETDRVSTAT _IOR(2, 0x12, struct floppy_drive_struct)
  #define FDPOLLDRVSTAT _IOR(2, 0x13, struct floppy_drive_struct)
  /* get drive state: GET returns the cached state, POLL polls for new state */
  
  
  /*
   * reset FDC
   */
  enum reset_mode {
  	FD_RESET_IF_NEEDED,	/* reset only if the reset flags is set */
  	FD_RESET_IF_RAWCMD,	/* obsolete */
  	FD_RESET_ALWAYS		/* reset always */
  };
  #define FDRESET _IO(2, 0x54)
  
  
  /*
   * FDC state
   */
  struct floppy_fdc_state {	
  	int spec1;		/* spec1 value last used */
  	int spec2;		/* spec2 value last used */
  	int dtr;
  	unsigned char version;	/* FDC version code */
  	unsigned char dor;
  	unsigned long address;	/* io address */
  	unsigned int rawcmd:2;
  	unsigned int reset:1;
  	unsigned int need_configure:1;
  	unsigned int perp_mode:2;
  	unsigned int has_fifo:1;
  	unsigned int driver_version;	/* version code for floppy driver */
  #define FD_DRIVER_VERSION 0x100
  /* user programs using the floppy API should use floppy_fdc_state to
   * get the version number of the floppy driver that they are running
   * on. If this version number is bigger than the one compiled into the
   * user program (the FD_DRIVER_VERSION define), it should be prepared
   * to bigger structures
   */
  
  	unsigned char track[4];
  	/* Position of the heads of the 4 units attached to this FDC,
  	 * as stored on the FDC. In the future, the position as stored
  	 * on the FDC might not agree with the actual physical
  	 * position of these drive heads. By allowing such
  	 * disagreement, it will be possible to reset the FDC without
  	 * incurring the expensive cost of repositioning all heads.
  	 * Right now, these positions are hard wired to 0. */
  
  };
  
  #define FDGETFDCSTAT _IOR(2, 0x15, struct floppy_fdc_state)
  
  
  /*
   * Asynchronous Write error tracking
   */
  struct floppy_write_errors {
  	/* Write error logging.
  	 *
  	 * These fields can be cleared with the FDWERRORCLR ioctl.
  	 * Only writes that were attempted but failed due to a physical media
  	 * error are logged.  write(2) calls that fail and return an error code
  	 * to the user process are not counted.
  	 */
  
  	unsigned int write_errors;  /* number of physical write errors 
  				     * encountered */
  	
  	/* position of first and last write errors */
  	unsigned long first_error_sector;
  	int           first_error_generation;
  	unsigned long last_error_sector;
  	int           last_error_generation;
  	
  	unsigned int badness; /* highest retry count for a read or write 
  			       * operation */
  };
  
  #define FDWERRORCLR  _IO(2, 0x56)
  /* clear write error and badness information */
  #define FDWERRORGET  _IOR(2, 0x17, struct floppy_write_errors)
  /* get write error and badness information */
  
  
  /*
   * Raw commands
   */
  /* new interface flag: now we can do them in batches */
  #define FDHAVEBATCHEDRAWCMD
  
  struct floppy_raw_cmd {
  	unsigned int flags;
  #define FD_RAW_READ 1
  #define FD_RAW_WRITE 2
  #define FD_RAW_NO_MOTOR 4
  #define FD_RAW_DISK_CHANGE 4 /* out: disk change flag was set */
  #define FD_RAW_INTR 8    /* wait for an interrupt */
  #define FD_RAW_SPIN 0x10 /* spin up the disk for this command */
  #define FD_RAW_NO_MOTOR_AFTER 0x20 /* switch the motor off after command 
  				    * completion */
  #define FD_RAW_NEED_DISK 0x40  /* this command needs a disk to be present */
  #define FD_RAW_NEED_SEEK 0x80  /* this command uses an implied seek (soft) */
  
  /* more "in" flags */
  #define FD_RAW_MORE 0x100  /* more records follow */
  #define FD_RAW_STOP_IF_FAILURE 0x200 /* stop if we encounter a failure */
  #define FD_RAW_STOP_IF_SUCCESS 0x400 /* stop if command successful */
  #define FD_RAW_SOFTFAILURE 0x800 /* consider the return value for failure
  				  * detection too */
  
  /* more "out" flags */
  #define FD_RAW_FAILURE 0x10000 /* command sent to fdc, fdc returned error */
  #define FD_RAW_HARDFAILURE 0x20000 /* fdc had to be reset, or timed out */
  
  	void __user *data;
  	char *kernel_data; /* location of data buffer in the kernel */
  	struct floppy_raw_cmd *next; /* used for chaining of raw cmd's 
  				      * within the kernel */
  	long length; /* in: length of dma transfer. out: remaining bytes */
  	long phys_length; /* physical length, if different from dma length */
  	int buffer_length; /* length of allocated buffer */
  
  	unsigned char rate;
  	unsigned char cmd_count;
  	unsigned char cmd[16];
  	unsigned char reply_count;
  	unsigned char reply[16];
  	int track;
  	int resultcode;
  
  	int reserved1;
  	int reserved2;
  };
  
  #define FDRAWCMD _IO(2, 0x58)
  /* send a raw command to the fdc. Structure size not included, because of
   * batches */
  
  #define FDTWADDLE _IO(2, 0x59)
  /* flicker motor-on bit before reading a sector. Experimental */
  
  
  #define FDEJECT _IO(2, 0x5a)
  /* eject the disk */
  
  
  
  #endif /* _UAPI_LINUX_FD_H */