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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'. */ #define FD_AUTODETECT_SIZE 8 short autodetect[FD_AUTODETECT_SIZE]; /* 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; #define FD_RAW_CMD_SIZE 16 #define FD_RAW_REPLY_SIZE 16 #define FD_RAW_CMD_FULLSIZE (FD_RAW_CMD_SIZE + 1 + FD_RAW_REPLY_SIZE) /* The command may take up the space initially intended for the reply * and the reply count. Needed for long 82078 commands such as RESTORE, * which takes 17 command bytes. */ unsigned char cmd_count; union { struct { unsigned char cmd[FD_RAW_CMD_SIZE]; unsigned char reply_count; unsigned char reply[FD_RAW_REPLY_SIZE]; }; unsigned char fullcmd[FD_RAW_CMD_FULLSIZE]; }; 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 */