drivers/block/amiflop.c

10  *  - added support for 40 Track 5.25" drives, 80-track hopefully behaves
29  *  - usage ioctl(d, RAW_TRACK, ptr); the raw track buffer (MFM-encoded data
93 #define DSKTRACK0   (0x1<<4)        /* head at track zero when low */
108 #define DSKSTEP     (0x1)           /* pulse low to step head 1 track */
154 #define FD_RECALIBRATE		0x07	/* move to track 0 */
155 #define FD_SEEK			0x0F	/* seek track */
160 #define FD_FORMAT		0x4D	/* format one track */
166 #define FLOPPY_MAX_SECTORS	22	/* Max. Number of sectors per track */
170 	int sects;		/* sectors per track */
171 	int (*read_fkt)(int);	/* read whole track */
172 	void (*write_fkt)(int);	/* write whole track */
180 	unsigned int read_size;	/* raw read size for one track */
181 	unsigned int write_size;	/* raw write size for one track */
183 	unsigned int precomp1;	/* start track for precomp 1 */
184 	unsigned int precomp2;	/* start track for precomp 2 */
193 	int track;			/* current track (-1 == unknown) */
194 	unsigned char *trackbuf;	/* current track (kmaloc()'d */
406 	if (unit[drive].track % 2 != 0)
553 			unit[drive].track = -1;
558 	unit[drive].track = 0;
566 static int fd_seek(int drive, int track)
572 	printk("seeking drive %d to track %d\n",drive,track);
576 	if (unit[drive].track == track) {
584 	if (unit[drive].track < 0 && !fd_calibrate(drive)) {
590 	cnt = unit[drive].track/2 - track/2;
593 	if (track % 2 != 0)
600 	if (track % 2 != unit[drive].track % 2)
602 	unit[drive].track = track;
733 	if ((ulong)unit[drive].track >= unit[drive].type->precomp2)
735 	else if ((ulong)unit[drive].track >= unit[drive].type->precomp1)
827 	unsigned char track;
862 			hdr.magic, hdr.track, hdr.sect, hdr.ord,
873 		/* verify track */
874 		if (hdr.track != unit[drive].track) {
875 			printk(KERN_INFO "MFM_TRACK: %d, %d\n", hdr.track, unit[drive].track);
885 			       hdr.magic, hdr.track, hdr.sect, hdr.ord, scnt,
942 	hdr.track = unit[disk].track;
983 	unsigned char track,   /* 0-80 */
1108 	return dos_crc(&(hdr->track), 0xb2, 0x30, 3); /* precomputed magic */
1166 				       "track %d, unit %d for sector %d\n",
1167 				       unit[drive].track,drive,scnt);
1179 		printk("(%3d,%d,%2d,%d) %x\n", hdr.track, hdr.side,
1188 		if (hdr.track != unit[drive].track/unit[drive].type->heads) {
1190 			       hdr.track,
1191 			       unit[drive].track/unit[drive].type->heads);
1195 		if (hdr.side != unit[drive].track%unit[drive].type->heads) {
1198 			       unit[drive].track%unit[drive].type->heads);
1211 			printk(KERN_INFO "dos_read: no data sync on track "
1213 			       unit[drive].track, drive, scnt, hdr.sec);
1223 			       hdr.track,hdr.side,hdr.sec,hdr.len_desc,scnt);
1234 			       "sc=%d, %x %x\n", hdr.track, hdr.side,
1288 	hdr.track=unit[drive].track/unit[drive].type->heads;
1289 	hdr.side=unit[drive].track%unit[drive].type->heads;
1294 	dos_encode_block((ushort *)raw,(unsigned char *) &hdr.track,28);
1363  * which is only true if we complete writing a track within three seconds
1423 static int get_track(int drive, int track)
1428 	if (unit[drive].track == track)
1442 		if (!fd_seek(drive, track))
1451 		unit[drive].track = -1;
1462 	unsigned int cnt, block, track, sector;
1472 		track = block / (floppy->dtype->sects * floppy->type->sect_mult);
1476 		printk("access to track %d, sector %d, with buffer at "
1477 		       "0x%08lx\n", track, sector, data);
1480 		if (get_track(drive, track) == -1)
1492 			 * setup a callback to write the track buffer
1582 		getprm.track=p->type->tracks;
1643 	unit[drive].track = -1;
1755 		p->track = -1;
1904 		unit[i].track = -1;