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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _LINUX_FD_H
#define _LINUX_FD_H
#include <linux/ioctl.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 *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 /* _LINUX_FD_H */
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