12  *   - Disk change detection and drive deselecting after motor-off
14  *   - Autodetection of disk format (DD/HD); untested yet, because I
33  *     the FDC will otherwise wait forever when no disk is inserted...
37  *  - more/other disk formats
42  *  - Make disk format numbering independent from minors
48  *  - disk formatting
61  *   - Maybe a better strategy for disk change detection (does anyone
168 /* Disk types: DD, HD, ED */
179 	{ "D820", 10,1640, 0, 0},	/*  3: DD disk with 82 tracks/10 sectors */
227 /* Array for translating minors into disk formats */
269  * Maximum disk size (in kilobytes). This default is used whenever the
270  * current disk size is unknown.
283  * restored upon disk change by floppy_revalidate() if valid (as seen by
293 	struct atari_disk_type	*disktype;	/* current type of disk */
299 				   disk change detection) */
301 	struct gendisk *disk[NUM_DISK_MINORS];  member
342  * of the disk to save read operations. These are two separate buffers
450 static int floppy_open(struct gendisk *disk, blk_mode_t mode);
451 static void floppy_release(struct gendisk *disk);
518  * clock speed for this disk's type.
596 	/* Test again later; if tested too often, it seems there is no disk  in fd_motor_off_timer()
598 	 * at least until a disk is inserted). So we'll test only twice  in fd_motor_off_timer()
606 /* This function is repeatedly called to detect disk changes (as good
761 	q = unit[drive].disk[type]->queue;  in do_format()
1064 		/* If reading a whole track, wait about one disk rotation and  in fd_rwsec()
1183 				/* try another disk type */  in fd_rwsec_done1()
1185 				set_capacity(unit[SelectedDrive].disk[0],  in fd_rwsec_done1()
1200 				set_capacity(unit[SelectedDrive].disk[0],  in fd_rwsec_done1()
1371  * FDC status register accessible for check_change. If the last disk
1405 		/* If the check for a disk change is done too early after this  in finish_fdc_done()
1421 /* The detection of disk changes is a dark chapter in Atari history :-(
1428  * filesystem used on the disk and thus the contents of block 0. I've
1429  * chosen the method to always say "The disk was changed" if it is
1431  * invalidates the disk buffers if you work with write protected
1433  * due to unrecognised disk changes.
1436 static unsigned int floppy_check_events(struct gendisk *disk,  in floppy_check_events()  argument
1439 	struct atari_floppy_struct *p = disk->private_data;  in floppy_check_events()
1459 static int floppy_revalidate(struct gendisk *disk)  in floppy_revalidate()  argument
1461 	struct atari_floppy_struct *p = disk->private_data;  in floppy_revalidate()
1507 	struct atari_floppy_struct *floppy = bd->rq->q->disk->private_data;  in ataflop_queue_rq()
1544 			set_capacity(bd->rq->q->disk, UDT->blocks);  in ataflop_queue_rq()
1549 		/* user supplied disk type */  in ataflop_queue_rq()
1551 			printk(KERN_WARNING "fd%d: invalid disk format", drive );  in ataflop_queue_rq()
1557 			printk(KERN_WARNING "fd%d: unsupported disk format", drive );  in ataflop_queue_rq()
1564 		set_capacity(bd->rq->q->disk, UDT->blocks);  in ataflop_queue_rq()
1588 	struct gendisk *disk = bdev->bd_disk;  in fd_locked_ioctl()  local
1589 	struct atari_floppy_struct *floppy = disk->private_data;  in fd_locked_ioctl()
1635 		 * disk change and subsequent revalidate()! simple  in fd_locked_ioctl()
1650 		if (floppy_check_events(disk, 0))  in fd_locked_ioctl()
1651 		        floppy_revalidate(disk);  in fd_locked_ioctl()
1688 				set_capacity(disk, UDT->blocks);  in fd_locked_ioctl()
1704 		/* no matching disk type found above - setting user_params */  in fd_locked_ioctl()
1710 			/* set user type (reset by disk change!) */  in fd_locked_ioctl()
1734 		set_capacity(disk, UDT->blocks);  in fd_locked_ioctl()
1757 		set_capacity(disk, MAX_DISK_SIZE * 2);  in fd_locked_ioctl()
1764 		if (disk_check_media_change(disk)) {  in fd_locked_ioctl()
1765 			bdev_mark_dead(disk->part0, true);  in fd_locked_ioctl()
1766 			floppy_revalidate(disk);  in fd_locked_ioctl()
1823  * whether a disk is inserted). This is done by issuing a restore
1825  * head across the whole disk) and looking at the state of the "TR00"
1875  * floppies, additionally start the disk-change and motor-off timers.
1921 static int floppy_open(struct gendisk *disk, blk_mode_t mode)  in floppy_open()  argument
1923 	struct atari_floppy_struct *p = disk->private_data;  in floppy_open()
1924 	int type = disk->first_minor >> 2;  in floppy_open()
1943 		if (disk_check_media_change(disk))  in floppy_open()
1944 			floppy_revalidate(disk);  in floppy_open()
1958 static int floppy_unlocked_open(struct gendisk *disk, blk_mode_t mode)  in floppy_unlocked_open()  argument
1963 	ret = floppy_open(disk, mode);  in floppy_unlocked_open()
1969 static void floppy_release(struct gendisk *disk)  in floppy_release()  argument
1971 	struct atari_floppy_struct *p = disk->private_data;  in floppy_release()
1999 	struct gendisk *disk;  in ataflop_alloc_disk()  local
2001 	disk = blk_mq_alloc_disk(&unit[drive].tag_set, &lim, NULL);  in ataflop_alloc_disk()
2002 	if (IS_ERR(disk))  in ataflop_alloc_disk()
2003 		return PTR_ERR(disk);  in ataflop_alloc_disk()
2005 	disk->major = FLOPPY_MAJOR;  in ataflop_alloc_disk()
2006 	disk->first_minor = drive + (type << 2);  in ataflop_alloc_disk()
2007 	disk->minors = 1;  in ataflop_alloc_disk()
2008 	sprintf(disk->disk_name, "fd%d", drive);  in ataflop_alloc_disk()
2009 	disk->fops = &floppy_fops;  in ataflop_alloc_disk()
2010 	disk->flags |= GENHD_FL_NO_PART;  in ataflop_alloc_disk()
2011 	disk->events = DISK_EVENT_MEDIA_CHANGE;  in ataflop_alloc_disk()
2012 	disk->private_data = &unit[drive];  in ataflop_alloc_disk()
2013 	set_capacity(disk, MAX_DISK_SIZE * 2);  in ataflop_alloc_disk()
2015 	unit[drive].disk[type] = disk;  in ataflop_alloc_disk()
2029 	if (unit[drive].disk[type])  in ataflop_probe()
2033 	if (add_disk(unit[drive].disk[type]))  in ataflop_probe()
2039 	put_disk(unit[drive].disk[type]);  in ataflop_probe()
2040 	unit[drive].disk[type] = NULL;  in ataflop_probe()
2050 			if (!unit[i].disk[type])  in atari_floppy_cleanup()
2052 			del_gendisk(unit[i].disk[type]);  in atari_floppy_cleanup()
2053 			put_disk(unit[i].disk[type]);  in atari_floppy_cleanup()
2067 		if (!fs->disk[type])  in atari_cleanup_floppy_disk()
2070 			del_gendisk(fs->disk[type]);  in atari_cleanup_floppy_disk()
2071 		put_disk(fs->disk[type]);  in atari_cleanup_floppy_disk()
2128 		ret = add_disk(unit[i].disk[0]);  in atari_floppy_init()