drivers/block/ataflop.c

28  *   - Initialize track register when testing presence of floppy
51  *  - increase gap size at start of track for HD/ED disks
94 #define FDCSELREG_TRA   (0x82)   /* track register */
128 #define FDCCMDADD_U     (0x10)   /* update track register */
163 	int track;		/* to be formatted */
171 	unsigned	spt;		/* sectors per track */
174 	unsigned 	stretch;	/* track doubling ? */
295 	int track;		/* current head position or -1 if
341  * operations. Second, a track buffer is used to cache a whole track
343  * because that allows write operations without clearing the track buffer.
358 static int UseTrackbuffer = -1;		  /* Do track buffering? */
367 #define	IS_BUFFERED(drive,side,track) \
368     (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track))
517 /* Select a drive, update the FDC's track register and set the correct
537 	/* restore track register to saved value */
538 	FDC_WRITE( FDCREG_TRACK, UD.track );
607  * as possible) and keep track of the current state of the write protection.
719 			SUD.track = -1;
774 	if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) {
782 	/* The track buffer is used for the raw track data, so its
793 		*p++ = desc->track;
810 	ReqTrack = desc->track;
826  * required parameter settings (drive select, side select, track
856 		    /* cmd == WRITE, pay attention to track buffer
866 	if (UD.track == -1)
868 	else if (UD.track != ReqTrack << UDT->stretch)
877 /* Seek to track 0 if the current track is unknown */
881 	if (SUD.track >= 0) {
913 		SUD.track = 0;
919 /* Seek the drive to the requested track. The drive must have been
925 	if (SUD.track == ReqTrack << SUDT->stretch) {
935 	DPRINT(("fd_seek() to track %d\n",ReqTrack));
957 		printk(KERN_ERR "fd%d: seek error (to track %d)\n",
959 		/* we don't know exactly which track we are on now! */
960 		SUD.track = -1;
964 		SUD.track = ReqTrack << SUDT->stretch;
975  * over the correct track.
985 	unsigned int track;
1013 	/* Cheat for track if stretch != 0 */
1015 		track = FDC_READ( FDCREG_TRACK);
1017 		FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch);
1063 		/* If reading a whole track, wait about one disk rotation and
1150 	unsigned int track;
1154 	/* Correct the track if stretch != 0 */
1156 		track = FDC_READ( FDCREG_TRACK);
1158 		FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch);
1215 		printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n",
1220 		printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n",
1225 		printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n",
1269 	unsigned int track;
1278 	/* Cheat for track if stretch != 0 */
1280 		track = FDC_READ( FDCREG_TRACK);
1282 		FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch);
1336 		printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n",
1372  * no matter what :-( To save time, the seek goes to the track we're
1383 		FDC_WRITE (FDCREG_DATA, SUD.track);
1621 		getprm.track = dtp->blocks/dtp->spt/2;
1726 		if (setprm.track != dtp->blocks/dtp->spt/2 ||
1760 		/* invalidate the buffer track to force a reread */
1796 	UD.track     = 0;
2102 		   track buffering off for all Medusas, though it
2123 		unit[i].track = -1;