2 * drivers/block/ataflop.c
4 * Copyright (C) 1993 Greg Harp
5 * Atari Support by Bjoern Brauel, Roman Hodek
7 * Big cleanup Sep 11..14 1994 Roman Hodek:
8 * - Driver now works interrupt driven
9 * - Support for two drives; should work, but I cannot test that :-(
10 * - Reading is done in whole tracks and buffered to speed up things
11 * - Disk change detection and drive deselecting after motor-off
13 * - Autodetection of disk format (DD/HD); untested yet, because I
14 * don't have an HD drive :-(
16 * Fixes Nov 13 1994 Martin Schaller:
17 * - Autodetection works now
18 * - Support for 5 1/4'' disks
19 * - Removed drive type (unknown on atari)
20 * - Do seeks with 8 Mhz
22 * Changes by Andreas Schwab:
23 * - After errors in multiple read mode try again reading single sectors
25 * - Clean up error handling
26 * - Set blk_size for proper size checking
27 * - Initialize track register when testing presence of floppy
28 * - Implement some ioctl's
30 * Changes by Torsten Lang:
31 * - When probing the floppies we should add the FDCCMDADD_H flag since
32 * the FDC will otherwise wait forever when no disk is inserted...
34 * ++ Freddi Aschwanden (fa) 20.9.95 fixes for medusa:
35 * - MFPDELAY() after each FDC access -> atari
36 * - more/other disk formats
37 * - DMA to the block buffer directly if we have a 32bit DMA
38 * - for medusa, the step rate is always 3ms
39 * - on medusa, use only cache_push()
41 * - Make disk format numbering independent from minors
42 * - Let user set max. supported drive type (speeds up format
43 * detection, saves buffer space)
46 * - implement some more ioctls
50 * - increase gap size at start of track for HD/ED disks
52 * Michael (MSch) 11/07/96:
53 * - implemented FDSETPRM and FDDEFPRM ioctl
56 * - implemented missing BLK* ioctls
60 * - Maybe a better strategy for disk change detection (does anyone
64 #include <linux/module.h>
66 #include <linux/sched.h>
67 #include <linux/string.h>
69 #include <linux/fcntl.h>
70 #include <linux/kernel.h>
71 #include <linux/timer.h>
73 #include <linux/errno.h>
74 #include <linux/types.h>
75 #include <linux/delay.h>
77 #include <linux/malloc.h>
78 #include <linux/init.h>
80 #include <asm/setup.h>
81 #include <asm/system.h>
82 #include <asm/bitops.h>
84 #include <asm/pgtable.h>
85 #include <asm/uaccess.h>
87 #include <asm/atafd.h>
88 #include <asm/atafdreg.h>
89 #include <asm/atarihw.h>
90 #include <asm/atariints.h>
91 #include <asm/atari_stdma.h>
92 #include <asm/atari_stram.h>
94 #define MAJOR_NR FLOPPY_MAJOR
95 #include <linux/blk.h>
96 #include <linux/blkpg.h>
98 #define FD_MAX_UNITS 2
102 /* Disk types: DD, HD, ED */
103 static struct atari_disk_type
{
105 unsigned spt
; /* sectors per track */
106 unsigned blocks
; /* total number of blocks */
107 unsigned fdc_speed
; /* fdc_speed setting */
108 unsigned stretch
; /* track doubling ? */
110 { "d360", 9, 720, 0, 0}, /* 0: 360kB diskette */
111 { "D360", 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */
112 { "D720", 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */
113 { "D820", 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */
114 /* formats above are probed for type DD */
115 #define MAX_TYPE_DD 3
116 { "h1200",15,2400, 3, 0}, /* 4: 1.2MB diskette */
117 { "H1440",18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */
118 { "H1640",20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */
119 /* formats above are probed for types DD and HD */
120 #define MAX_TYPE_HD 6
121 { "E2880",36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */
122 { "E3280",40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */
123 /* formats above are probed for types DD, HD and ED */
124 #define MAX_TYPE_ED 8
125 /* types below are never autoprobed */
126 { "H1680",21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */
127 { "h410",10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */
128 { "h1476",18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */
129 { "H1722",21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */
130 { "h420",10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */
131 { "H830",10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */
132 { "h1494",18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */
133 { "H1743",21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */
134 { "h880",11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */
135 { "D1040",13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */
136 { "D1120",14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */
137 { "h1600",20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */
138 { "H1760",22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */
139 { "H1920",24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */
140 { "E3200",40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */
141 { "E3520",44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */
142 { "E3840",48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */
143 { "H1840",23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */
144 { "D800",10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */
147 static int StartDiskType
[] = {
157 static int DriveType
= TYPE_HD
;
159 /* Array for translating minors into disk formats */
162 unsigned drive_types
;
163 } minor2disktype
[] = {
164 { 0, TYPE_DD
}, /* 1: d360 */
165 { 4, TYPE_HD
}, /* 2: h1200 */
166 { 1, TYPE_DD
}, /* 3: D360 */
167 { 2, TYPE_DD
}, /* 4: D720 */
168 { 1, TYPE_DD
}, /* 5: h360 = D360 */
169 { 2, TYPE_DD
}, /* 6: h720 = D720 */
170 { 5, TYPE_HD
}, /* 7: H1440 */
171 { 7, TYPE_ED
}, /* 8: E2880 */
172 /* some PC formats :-) */
173 { 8, TYPE_ED
}, /* 9: E3280 <- was "CompaQ" == E2880 for PC */
174 { 5, TYPE_HD
}, /* 10: h1440 = H1440 */
175 { 9, TYPE_HD
}, /* 11: H1680 */
176 { 10, TYPE_DD
}, /* 12: h410 */
177 { 3, TYPE_DD
}, /* 13: H820 <- == D820, 82x10 */
178 { 11, TYPE_HD
}, /* 14: h1476 */
179 { 12, TYPE_HD
}, /* 15: H1722 */
180 { 13, TYPE_DD
}, /* 16: h420 */
181 { 14, TYPE_DD
}, /* 17: H830 */
182 { 15, TYPE_HD
}, /* 18: h1494 */
183 { 16, TYPE_HD
}, /* 19: H1743 */
184 { 17, TYPE_DD
}, /* 20: h880 */
185 { 18, TYPE_DD
}, /* 21: D1040 */
186 { 19, TYPE_DD
}, /* 22: D1120 */
187 { 20, TYPE_HD
}, /* 23: h1600 */
188 { 21, TYPE_HD
}, /* 24: H1760 */
189 { 22, TYPE_HD
}, /* 25: H1920 */
190 { 23, TYPE_ED
}, /* 26: E3200 */
191 { 24, TYPE_ED
}, /* 27: E3520 */
192 { 25, TYPE_ED
}, /* 28: E3840 */
193 { 26, TYPE_HD
}, /* 29: H1840 */
194 { 27, TYPE_DD
}, /* 30: D800 */
195 { 6, TYPE_HD
}, /* 31: H1640 <- was H1600 == h1600 for PC */
198 #define NUM_DISK_MINORS (sizeof(minor2disktype)/sizeof(*minor2disktype))
201 * Maximum disk size (in kilobytes). This default is used whenever the
202 * current disk size is unknown.
204 #define MAX_DISK_SIZE 3280
207 * MSch: User-provided type information. 'drive' points to
208 * the respective entry of this array. Set by FDSETPRM ioctls.
210 static struct atari_disk_type user_params
[FD_MAX_UNITS
];
213 * User-provided permanent type information. 'drive' points to
214 * the respective entry of this array. Set by FDDEFPRM ioctls,
215 * restored upon disk change by floppy_revalidate() if valid (as seen by
216 * default_params[].blocks > 0 - a bit in unit[].flags might be used for this?)
218 static struct atari_disk_type default_params
[FD_MAX_UNITS
] = {
219 { NULL
, 0, 0, 0, 0}, };
221 static int floppy_sizes
[256];
222 static int floppy_blocksizes
[256] = { 0, };
224 /* current info on each unit */
225 static struct atari_floppy_struct
{
226 int connected
; /* !=0 : drive is connected */
227 int autoprobe
; /* !=0 : do autoprobe */
229 struct atari_disk_type
*disktype
; /* current type of disk */
231 int track
; /* current head position or -1 if
233 unsigned int steprate
; /* steprate setting */
234 unsigned int wpstat
; /* current state of WP signal (for
235 disk change detection) */
236 int flags
; /* flags */
237 } unit
[FD_MAX_UNITS
];
239 #define UD unit[drive]
240 #define UDT unit[drive].disktype
241 #define SUD unit[SelectedDrive]
242 #define SUDT unit[SelectedDrive].disktype
245 #define FDC_READ(reg) ({ \
246 /* unsigned long __flags; */ \
247 unsigned short __val; \
248 /* save_flags(__flags); cli(); */ \
249 dma_wd.dma_mode_status = 0x80 | (reg); \
251 __val = dma_wd.fdc_acces_seccount; \
253 /* restore_flags(__flags); */ \
257 #define FDC_WRITE(reg,val) \
259 /* unsigned long __flags; */ \
260 /* save_flags(__flags); cli(); */ \
261 dma_wd.dma_mode_status = 0x80 | (reg); \
263 dma_wd.fdc_acces_seccount = (val); \
265 /* restore_flags(__flags); */ \
269 /* Buffering variables:
270 * First, there is a DMA buffer in ST-RAM that is used for floppy DMA
271 * operations. Second, a track buffer is used to cache a whole track
272 * of the disk to save read operations. These are two separate buffers
273 * because that allows write operations without clearing the track buffer.
276 static int MaxSectors
[] = {
279 static int BufferSize
[] = {
280 15*512, 30*512, 60*512
283 #define BUFFER_SIZE (BufferSize[DriveType])
285 unsigned char *DMABuffer
; /* buffer for writes */
286 static unsigned long PhysDMABuffer
; /* physical address */
288 static int UseTrackbuffer
= -1; /* Do track buffering? */
289 MODULE_PARM(UseTrackbuffer
, "i");
291 unsigned char *TrackBuffer
; /* buffer for reads */
292 static unsigned long PhysTrackBuffer
; /* physical address */
293 static int BufferDrive
, BufferSide
, BufferTrack
;
294 static int read_track
; /* non-zero if we are reading whole tracks */
296 #define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512)
297 #define IS_BUFFERED(drive,side,track) \
298 (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track))
301 * These are global variables, as that's the easiest way to give
302 * information to interrupts. They are the data used for the current
305 static int SelectedDrive
= 0;
306 static int ReqCmd
, ReqBlock
;
307 static int ReqSide
, ReqTrack
, ReqSector
, ReqCnt
;
308 static int HeadSettleFlag
= 0;
309 static unsigned char *ReqData
, *ReqBuffer
;
310 static int MotorOn
= 0, MotorOffTrys
;
311 static int IsFormatting
= 0, FormatError
;
313 static int UserSteprate
[FD_MAX_UNITS
] = { -1, -1 };
314 MODULE_PARM(UserSteprate
, "1-" __MODULE_STRING(FD_MAX_UNITS
) "i");
316 /* Synchronization of FDC access. */
317 static volatile int fdc_busy
= 0;
318 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait
);
319 static DECLARE_WAIT_QUEUE_HEAD(format_wait
);
321 static unsigned int changed_floppies
= 0xff, fake_change
= 0;
322 #define CHECK_CHANGE_DELAY HZ/2
324 #define FD_MOTOR_OFF_DELAY (3*HZ)
325 #define FD_MOTOR_OFF_MAXTRY (10*20)
327 #define FLOPPY_TIMEOUT (6*HZ)
328 #define RECALIBRATE_ERRORS 4 /* After this many errors the drive
329 * will be recalibrated. */
330 #define MAX_ERRORS 8 /* After this many errors the driver
334 #define START_MOTOR_OFF_TIMER(delay) \
336 motor_off_timer.expires = jiffies + (delay); \
337 add_timer( &motor_off_timer ); \
341 #define START_CHECK_CHANGE_TIMER(delay) \
343 timer_table[FLOPPY_TIMER].expires = jiffies + (delay); \
344 timer_active |= (1 << FLOPPY_TIMER); \
347 #define START_TIMEOUT() \
348 mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT)
350 #define STOP_TIMEOUT() \
351 del_timer(&timeout_timer)
355 * The driver is trying to determine the correct media format
356 * while Probing is set. fd_rwsec_done() clears it after a
359 static int Probing
= 0;
361 /* This flag is set when a dummy seek is necessary to make the WP
362 * status bit accessible.
364 static int NeedSeek
= 0;
368 #define DPRINT(a) printk a
373 /***************************** Prototypes *****************************/
375 static void fd_select_side( int side
);
376 static void fd_select_drive( int drive
);
377 static void fd_deselect( void );
378 static void fd_motor_off_timer( unsigned long dummy
);
379 static void check_change( void );
380 static __inline__
void set_head_settle_flag( void );
381 static __inline__
int get_head_settle_flag( void );
382 static void floppy_irq (int irq
, void *dummy
, struct pt_regs
*fp
);
383 static void fd_error( void );
384 static int do_format(kdev_t drive
, struct atari_format_descr
*desc
);
385 static void do_fd_action( int drive
);
386 static void fd_calibrate( void );
387 static void fd_calibrate_done( int status
);
388 static void fd_seek( void );
389 static void fd_seek_done( int status
);
390 static void fd_rwsec( void );
391 static void fd_readtrack_check( unsigned long dummy
);
392 static void fd_rwsec_done( int status
);
393 static void fd_rwsec_done1(int status
);
394 static void fd_writetrack( void );
395 static void fd_writetrack_done( int status
);
396 static void fd_times_out( unsigned long dummy
);
397 static void finish_fdc( void );
398 static void finish_fdc_done( int dummy
);
399 static void floppy_off( unsigned int nr
);
400 static __inline__
void copy_buffer( void *from
, void *to
);
401 static void setup_req_params( int drive
);
402 static void redo_fd_request( void);
403 static int invalidate_drive(kdev_t rdev
);
404 static int fd_ioctl( struct inode
*inode
, struct file
*filp
, unsigned int
405 cmd
, unsigned long param
);
406 static void fd_probe( int drive
);
407 static int fd_test_drive_present( int drive
);
408 static void config_types( void );
409 static int floppy_open( struct inode
*inode
, struct file
*filp
);
410 static int floppy_release( struct inode
* inode
, struct file
* filp
);
412 /************************* End of Prototypes **************************/
414 static struct timer_list motor_off_timer
=
415 { NULL
, NULL
, 0, 0, fd_motor_off_timer
};
416 static struct timer_list readtrack_timer
=
417 { NULL
, NULL
, 0, 0, fd_readtrack_check
};
419 static struct timer_list timeout_timer
=
420 { NULL
, NULL
, 0, 0, fd_times_out
};
424 /* Select the side to use. */
426 static void fd_select_side( int side
)
431 cli(); /* protect against various other ints mucking around with the PSG */
433 sound_ym
.rd_data_reg_sel
= 14; /* Select PSG Port A */
434 sound_ym
.wd_data
= (side
== 0) ? sound_ym
.rd_data_reg_sel
| 0x01 :
435 sound_ym
.rd_data_reg_sel
& 0xfe;
437 restore_flags(flags
);
441 /* Select a drive, update the FDC's track register and set the correct
442 * clock speed for this disk's type.
445 static void fd_select_drive( int drive
)
450 if (drive
== SelectedDrive
)
454 cli(); /* protect against various other ints mucking around with the PSG */
455 sound_ym
.rd_data_reg_sel
= 14; /* Select PSG Port A */
456 tmp
= sound_ym
.rd_data_reg_sel
;
457 sound_ym
.wd_data
= (tmp
| DSKDRVNONE
) & ~(drive
== 0 ? DSKDRV0
: DSKDRV1
);
458 atari_dont_touch_floppy_select
= 1;
459 restore_flags(flags
);
461 /* restore track register to saved value */
462 FDC_WRITE( FDCREG_TRACK
, UD
.track
);
465 /* select 8/16 MHz */
467 if (ATARIHW_PRESENT(FDCSPEED
))
468 dma_wd
.fdc_speed
= UDT
->fdc_speed
;
470 SelectedDrive
= drive
;
474 /* Deselect both drives. */
476 static void fd_deselect( void )
481 cli(); /* protect against various other ints mucking around with the PSG */
482 atari_dont_touch_floppy_select
= 0;
483 sound_ym
.rd_data_reg_sel
=14; /* Select PSG Port A */
484 sound_ym
.wd_data
= (sound_ym
.rd_data_reg_sel
|
485 (MACH_IS_FALCON
? 3 : 7)); /* no drives selected */
486 /* On Falcon, the drive B select line is used on the printer port, so
487 * leave it alone... */
489 restore_flags(flags
);
493 /* This timer function deselects the drives when the FDC switched the
494 * motor off. The deselection cannot happen earlier because the FDC
495 * counts the index signals, which arrive only if one drive is selected.
498 static void fd_motor_off_timer( unsigned long dummy
)
500 /* unsigned long flags; */
501 unsigned char status
;
504 del_timer( &motor_off_timer
);
506 if (SelectedDrive
< 0)
507 /* no drive selected, needn't deselect anyone */
510 /* save_flags(flags);
513 if (stdma_islocked())
516 status
= FDC_READ( FDCREG_STATUS
);
518 if (!(status
& 0x80)) {
519 /* motor already turned off by FDC -> deselect drives */
522 /* restore_flags(flags); */
525 /* not yet off, try again */
528 /* restore_flags(flags); */
529 /* Test again later; if tested too often, it seems there is no disk
530 * in the drive and the FDC will leave the motor on forever (or,
531 * at least until a disk is inserted). So we'll test only twice
532 * per second from then on...
534 delay
= (MotorOffTrys
< FD_MOTOR_OFF_MAXTRY
) ?
535 (++MotorOffTrys
, HZ
/20) : HZ
/2;
536 START_MOTOR_OFF_TIMER( delay
);
540 /* This function is repeatedly called to detect disk changes (as good
541 * as possible) and keep track of the current state of the write protection.
544 static void check_change( void )
546 static int drive
= 0;
549 unsigned char old_porta
;
552 if (++drive
> 1 || !UD
.connected
)
556 cli(); /* protect against various other ints mucking around with the PSG */
558 if (!stdma_islocked()) {
559 sound_ym
.rd_data_reg_sel
= 14;
560 old_porta
= sound_ym
.rd_data_reg_sel
;
561 sound_ym
.wd_data
= (old_porta
| DSKDRVNONE
) &
562 ~(drive
== 0 ? DSKDRV0
: DSKDRV1
);
563 stat
= !!(FDC_READ( FDCREG_STATUS
) & FDCSTAT_WPROT
);
564 sound_ym
.wd_data
= old_porta
;
566 if (stat
!= UD
.wpstat
) {
567 DPRINT(( "wpstat[%d] = %d\n", drive
, stat
));
569 set_bit (drive
, &changed_floppies
);
572 restore_flags(flags
);
574 START_CHECK_CHANGE_TIMER( CHECK_CHANGE_DELAY
);
578 /* Handling of the Head Settling Flag: This flag should be set after each
579 * seek operation, because we don't use seeks with verify.
582 static __inline__
void set_head_settle_flag( void )
584 HeadSettleFlag
= FDCCMDADD_E
;
587 static __inline__
int get_head_settle_flag( void )
589 int tmp
= HeadSettleFlag
;
597 /* General Interrupt Handling */
599 static void (*FloppyIRQHandler
)( int status
) = NULL
;
601 static void floppy_irq (int irq
, void *dummy
, struct pt_regs
*fp
)
603 unsigned char status
;
604 void (*handler
)( int );
606 handler
= FloppyIRQHandler
;
607 FloppyIRQHandler
= NULL
;
611 status
= FDC_READ( FDCREG_STATUS
);
612 DPRINT(("FDC irq, status = %02x handler = %08lx\n",status
,(unsigned long)handler
));
616 DPRINT(("FDC irq, no handler\n"));
621 /* Error handling: If some error happened, retry some times, then
622 * recalibrate, then try again, and fail after MAX_ERRORS.
625 static void fd_error( void )
630 wake_up( &format_wait
);
634 if (!CURRENT
) return;
636 if (CURRENT
->errors
>= MAX_ERRORS
) {
637 printk(KERN_ERR
"fd%d: too many errors.\n", SelectedDrive
);
640 else if (CURRENT
->errors
== RECALIBRATE_ERRORS
) {
641 printk(KERN_WARNING
"fd%d: recalibrating\n", SelectedDrive
);
642 if (SelectedDrive
!= -1)
650 #define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0)
653 /* ---------- Formatting ---------- */
655 #define FILL(n,val) \
657 memset( p, val, n ); \
661 static int do_format(kdev_t device
, struct atari_format_descr
*desc
)
666 int type
, drive
= MINOR(device
) & 3;
668 DPRINT(("do_format( dr=%d tr=%d he=%d offs=%d )\n",
669 drive
, desc
->track
, desc
->head
, desc
->sect_offset
));
673 while( fdc_busy
) sleep_on( &fdc_wait
);
675 stdma_lock(floppy_irq
, NULL
);
676 atari_turnon_irq( IRQ_MFP_FDC
); /* should be already, just to be sure */
677 restore_flags(flags
);
679 type
= MINOR(device
) >> 2;
681 if (--type
>= NUM_DISK_MINORS
||
682 minor2disktype
[type
].drive_types
> DriveType
) {
686 type
= minor2disktype
[type
].index
;
687 UDT
= &disk_type
[type
];
690 if (!UDT
|| desc
->track
>= UDT
->blocks
/UDT
->spt
/2 || desc
->head
>= 2) {
697 /* The track buffer is used for the raw track data, so its
698 contents become invalid! */
700 /* stop deselect timer */
701 del_timer( &motor_off_timer
);
703 FILL( 60 * (nsect
/ 9), 0x4e );
704 for( sect
= 0; sect
< nsect
; ++sect
) {
710 *p
++ = (nsect
+ sect
- desc
->sect_offset
) % nsect
+ 1;
721 FILL( TrackBuffer
+BUFFER_SIZE
-p
, 0x4e );
725 ReqTrack
= desc
->track
;
726 ReqSide
= desc
->head
;
727 do_fd_action( drive
);
729 sleep_on( &format_wait
);
732 return( FormatError
? -EIO
: 0 );
736 /* do_fd_action() is the general procedure for a fd request: All
737 * required parameter settings (drive select, side select, track
738 * position) are checked and set if needed. For each of these
739 * parameters and the actual reading or writing exist two functions:
740 * one that starts the setting (or skips it if possible) and one
741 * callback for the "done" interrupt. Each done func calls the next
742 * set function to propagate the request down to fd_rwsec_done().
745 static void do_fd_action( int drive
)
747 DPRINT(("do_fd_action\n"));
749 if (UseTrackbuffer
&& !IsFormatting
) {
751 if (IS_BUFFERED( drive
, ReqSide
, ReqTrack
)) {
752 if (ReqCmd
== READ
) {
753 copy_buffer( SECTOR_BUFFER(ReqSector
), ReqData
);
754 if (++ReqCnt
< CURRENT
->current_nr_sectors
) {
755 /* read next sector */
756 setup_req_params( drive
);
760 /* all sectors finished */
761 CURRENT
->nr_sectors
-= CURRENT
->current_nr_sectors
;
762 CURRENT
->sector
+= CURRENT
->current_nr_sectors
;
769 /* cmd == WRITE, pay attention to track buffer
771 copy_buffer( ReqData
, SECTOR_BUFFER(ReqSector
) );
776 if (SelectedDrive
!= drive
)
777 fd_select_drive( drive
);
781 else if (UD
.track
!= ReqTrack
<< UDT
->stretch
)
783 else if (IsFormatting
)
790 /* Seek to track 0 if the current track is unknown */
792 static void fd_calibrate( void )
794 if (SUD
.track
>= 0) {
795 fd_calibrate_done( 0 );
799 if (ATARIHW_PRESENT(FDCSPEED
))
800 dma_wd
.fdc_speed
= 0; /* always seek with 8 Mhz */;
801 DPRINT(("fd_calibrate\n"));
802 SET_IRQ_HANDLER( fd_calibrate_done
);
803 /* we can't verify, since the speed may be incorrect */
804 FDC_WRITE( FDCREG_CMD
, FDCCMD_RESTORE
| SUD
.steprate
);
813 static void fd_calibrate_done( int status
)
815 DPRINT(("fd_calibrate_done()\n"));
818 /* set the correct speed now */
819 if (ATARIHW_PRESENT(FDCSPEED
))
820 dma_wd
.fdc_speed
= SUDT
->fdc_speed
;
821 if (status
& FDCSTAT_RECNF
) {
822 printk(KERN_ERR
"fd%d: restore failed\n", SelectedDrive
);
832 /* Seek the drive to the requested track. The drive must have been
833 * calibrated at some point before this.
836 static void fd_seek( void )
838 if (SUD
.track
== ReqTrack
<< SUDT
->stretch
) {
843 if (ATARIHW_PRESENT(FDCSPEED
)) {
844 dma_wd
.fdc_speed
= 0; /* always seek witch 8 Mhz */
848 DPRINT(("fd_seek() to track %d\n",ReqTrack
));
849 FDC_WRITE( FDCREG_DATA
, ReqTrack
<< SUDT
->stretch
);
851 SET_IRQ_HANDLER( fd_seek_done
);
852 FDC_WRITE( FDCREG_CMD
, FDCCMD_SEEK
| SUD
.steprate
);
855 set_head_settle_flag();
861 static void fd_seek_done( int status
)
863 DPRINT(("fd_seek_done()\n"));
866 /* set the correct speed */
867 if (ATARIHW_PRESENT(FDCSPEED
))
868 dma_wd
.fdc_speed
= SUDT
->fdc_speed
;
869 if (status
& FDCSTAT_RECNF
) {
870 printk(KERN_ERR
"fd%d: seek error (to track %d)\n",
871 SelectedDrive
, ReqTrack
);
872 /* we don't know exactly which track we are on now! */
877 SUD
.track
= ReqTrack
<< SUDT
->stretch
;
887 /* This does the actual reading/writing after positioning the head
888 * over the correct track.
891 static int MultReadInProgress
= 0;
894 static void fd_rwsec( void )
896 unsigned long paddr
, flags
;
897 unsigned int rwflag
, old_motoron
;
900 DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector
, ReqCmd
== WRITE
? 'w' : 'r' ));
901 if (ReqCmd
== WRITE
) {
902 if (ATARIHW_PRESENT(EXTD_DMA
)) {
903 paddr
= (unsigned long)VTOP(ReqData
);
906 copy_buffer( ReqData
, DMABuffer
);
907 paddr
= PhysDMABuffer
;
909 dma_cache_maintenance( paddr
, 512, 1 );
914 paddr
= PhysTrackBuffer
;
916 paddr
= ATARIHW_PRESENT(EXTD_DMA
) ? VTOP(ReqData
) : PhysDMABuffer
;
920 fd_select_side( ReqSide
);
922 /* Start sector of this operation */
923 FDC_WRITE( FDCREG_SECTOR
, read_track
? 1 : ReqSector
);
925 /* Cheat for track if stretch != 0 */
927 track
= FDC_READ( FDCREG_TRACK
);
929 FDC_WRITE( FDCREG_TRACK
, track
>> SUDT
->stretch
);
936 dma_wd
.dma_lo
= (unsigned char)paddr
;
939 dma_wd
.dma_md
= (unsigned char)paddr
;
942 if (ATARIHW_PRESENT(EXTD_DMA
))
943 st_dma_ext_dmahi
= (unsigned short)paddr
;
945 dma_wd
.dma_hi
= (unsigned char)paddr
;
947 restore_flags(flags
);
949 /* Clear FIFO and switch DMA to correct mode */
950 dma_wd
.dma_mode_status
= 0x90 | rwflag
;
952 dma_wd
.dma_mode_status
= 0x90 | (rwflag
^ 0x100);
954 dma_wd
.dma_mode_status
= 0x90 | rwflag
;
957 /* How many sectors for DMA */
958 dma_wd
.fdc_acces_seccount
= read_track
? SUDT
->spt
: 1;
962 /* Start operation */
963 dma_wd
.dma_mode_status
= FDCSELREG_STP
| rwflag
;
965 SET_IRQ_HANDLER( fd_rwsec_done
);
966 dma_wd
.fdc_acces_seccount
=
967 (get_head_settle_flag() |
968 (rwflag
? FDCCMD_WRSEC
: (FDCCMD_RDSEC
| (read_track
? FDCCMDADD_M
: 0))));
970 old_motoron
= MotorOn
;
973 /* wait for interrupt */
976 /* If reading a whole track, wait about one disk rotation and
977 * then check if all sectors are read. The FDC will even
978 * search for the first non-existent sector and need 1 sec to
979 * recognise that it isn't present :-(
981 del_timer (&readtrack_timer
);
982 readtrack_timer
.expires
=
983 jiffies
+ HZ
/5 + (old_motoron
? 0 : HZ
);
984 /* 1 rot. + 5 rot.s if motor was off */
985 MultReadInProgress
= 1;
986 add_timer( &readtrack_timer
);
992 static void fd_readtrack_check( unsigned long dummy
)
994 unsigned long flags
, addr
, addr2
;
999 del_timer( &readtrack_timer
);
1001 if (!MultReadInProgress
) {
1002 /* This prevents a race condition that could arise if the
1003 * interrupt is triggered while the calling of this timer
1004 * callback function takes place. The IRQ function then has
1005 * already cleared 'MultReadInProgress' when flow of control
1008 restore_flags(flags
);
1012 /* get the current DMA address */
1013 /* ++ f.a. read twice to avoid being fooled by switcher */
1017 addr
= dma_wd
.dma_lo
& 0xff;
1019 addr
|= (dma_wd
.dma_md
& 0xff) << 8;
1021 if (ATARIHW_PRESENT( EXTD_DMA
))
1022 addr
|= (st_dma_ext_dmahi
& 0xffff) << 16;
1024 addr
|= (dma_wd
.dma_hi
& 0xff) << 16;
1026 } while(addr
!= addr2
);
1028 if (addr
>= PhysTrackBuffer
+ SUDT
->spt
*512) {
1029 /* already read enough data, force an FDC interrupt to stop
1030 * the read operation
1032 SET_IRQ_HANDLER( NULL
);
1033 MultReadInProgress
= 0;
1034 restore_flags(flags
);
1035 DPRINT(("fd_readtrack_check(): done\n"));
1036 FDC_WRITE( FDCREG_CMD
, FDCCMD_FORCI
);
1039 /* No error until now -- the FDC would have interrupted
1045 /* not yet finished, wait another tenth rotation */
1046 restore_flags(flags
);
1047 DPRINT(("fd_readtrack_check(): not yet finished\n"));
1048 readtrack_timer
.expires
= jiffies
+ HZ
/5/10;
1049 add_timer( &readtrack_timer
);
1054 static void fd_rwsec_done( int status
)
1056 DPRINT(("fd_rwsec_done()\n"));
1059 del_timer(&readtrack_timer
);
1060 if (!MultReadInProgress
)
1062 MultReadInProgress
= 0;
1064 fd_rwsec_done1(status
);
1067 static void fd_rwsec_done1(int status
)
1073 /* Correct the track if stretch != 0 */
1074 if (SUDT
->stretch
) {
1075 track
= FDC_READ( FDCREG_TRACK
);
1077 FDC_WRITE( FDCREG_TRACK
, track
<< SUDT
->stretch
);
1080 if (!UseTrackbuffer
) {
1081 dma_wd
.dma_mode_status
= 0x90;
1083 if (!(dma_wd
.dma_mode_status
& 0x01)) {
1084 printk(KERN_ERR
"fd%d: DMA error\n", SelectedDrive
);
1090 if (ReqCmd
== WRITE
&& (status
& FDCSTAT_WPROT
)) {
1091 printk(KERN_NOTICE
"fd%d: is write protected\n", SelectedDrive
);
1094 if ((status
& FDCSTAT_RECNF
) &&
1095 /* RECNF is no error after a multiple read when the FDC
1096 searched for a non-existent sector! */
1097 !(read_track
&& FDC_READ(FDCREG_SECTOR
) > SUDT
->spt
)) {
1099 if (SUDT
> disk_type
) {
1100 if (SUDT
[-1].blocks
> ReqBlock
) {
1101 /* try another disk type */
1103 floppy_sizes
[SelectedDrive
] = SUDT
->blocks
>> 1;
1108 if (SUD
.flags
& FTD_MSG
)
1109 printk(KERN_INFO
"fd%d: Auto-detected floppy type %s\n",
1110 SelectedDrive
, SUDT
->name
);
1114 /* record not found, but not probing. Maybe stretch wrong ? Restart probing */
1115 if (SUD
.autoprobe
) {
1116 SUDT
= disk_type
+ StartDiskType
[DriveType
];
1117 floppy_sizes
[SelectedDrive
] = SUDT
->blocks
>> 1;
1122 if (ATARIHW_PRESENT(FDCSPEED
)) {
1123 dma_wd
.fdc_speed
= SUDT
->fdc_speed
;
1126 setup_req_params( SelectedDrive
);
1128 do_fd_action( SelectedDrive
);
1132 printk(KERN_ERR
"fd%d: sector %d not found (side %d, track %d)\n",
1133 SelectedDrive
, FDC_READ (FDCREG_SECTOR
), ReqSide
, ReqTrack
);
1136 if (status
& FDCSTAT_CRC
) {
1137 printk(KERN_ERR
"fd%d: CRC error (side %d, track %d, sector %d)\n",
1138 SelectedDrive
, ReqSide
, ReqTrack
, FDC_READ (FDCREG_SECTOR
) );
1141 if (status
& FDCSTAT_LOST
) {
1142 printk(KERN_ERR
"fd%d: lost data (side %d, track %d, sector %d)\n",
1143 SelectedDrive
, ReqSide
, ReqTrack
, FDC_READ (FDCREG_SECTOR
) );
1149 if (ReqCmd
== READ
) {
1152 addr
= ATARIHW_PRESENT( EXTD_DMA
) ? ReqData
: DMABuffer
;
1153 dma_cache_maintenance( VTOP(addr
), 512, 0 );
1154 if (!ATARIHW_PRESENT( EXTD_DMA
))
1155 copy_buffer (addr
, ReqData
);
1157 dma_cache_maintenance( PhysTrackBuffer
, MaxSectors
[DriveType
] * 512, 0 );
1158 BufferDrive
= SelectedDrive
;
1159 BufferSide
= ReqSide
;
1160 BufferTrack
= ReqTrack
;
1161 copy_buffer (SECTOR_BUFFER (ReqSector
), ReqData
);
1165 if (++ReqCnt
< CURRENT
->current_nr_sectors
) {
1166 /* read next sector */
1167 setup_req_params( SelectedDrive
);
1168 do_fd_action( SelectedDrive
);
1171 /* all sectors finished */
1172 CURRENT
->nr_sectors
-= CURRENT
->current_nr_sectors
;
1173 CURRENT
->sector
+= CURRENT
->current_nr_sectors
;
1185 static void fd_writetrack( void )
1187 unsigned long paddr
, flags
;
1190 DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack
, ReqSide
));
1192 paddr
= PhysTrackBuffer
;
1193 dma_cache_maintenance( paddr
, BUFFER_SIZE
, 1 );
1195 fd_select_side( ReqSide
);
1197 /* Cheat for track if stretch != 0 */
1198 if (SUDT
->stretch
) {
1199 track
= FDC_READ( FDCREG_TRACK
);
1201 FDC_WRITE(FDCREG_TRACK
,track
>> SUDT
->stretch
);
1208 dma_wd
.dma_lo
= (unsigned char)paddr
;
1211 dma_wd
.dma_md
= (unsigned char)paddr
;
1214 if (ATARIHW_PRESENT( EXTD_DMA
))
1215 st_dma_ext_dmahi
= (unsigned short)paddr
;
1217 dma_wd
.dma_hi
= (unsigned char)paddr
;
1219 restore_flags(flags
);
1221 /* Clear FIFO and switch DMA to correct mode */
1222 dma_wd
.dma_mode_status
= 0x190;
1224 dma_wd
.dma_mode_status
= 0x90;
1226 dma_wd
.dma_mode_status
= 0x190;
1229 /* How many sectors for DMA */
1230 dma_wd
.fdc_acces_seccount
= BUFFER_SIZE
/512;
1233 /* Start operation */
1234 dma_wd
.dma_mode_status
= FDCSELREG_STP
| 0x100;
1236 SET_IRQ_HANDLER( fd_writetrack_done
);
1237 dma_wd
.fdc_acces_seccount
= FDCCMD_WRTRA
| get_head_settle_flag();
1241 /* wait for interrupt */
1245 static void fd_writetrack_done( int status
)
1247 DPRINT(("fd_writetrack_done()\n"));
1251 if (status
& FDCSTAT_WPROT
) {
1252 printk(KERN_NOTICE
"fd%d: is write protected\n", SelectedDrive
);
1255 if (status
& FDCSTAT_LOST
) {
1256 printk(KERN_ERR
"fd%d: lost data (side %d, track %d)\n",
1257 SelectedDrive
, ReqSide
, ReqTrack
);
1261 wake_up( &format_wait
);
1268 static void fd_times_out( unsigned long dummy
)
1270 atari_disable_irq( IRQ_MFP_FDC
);
1271 if (!FloppyIRQHandler
) goto end
; /* int occurred after timer was fired, but
1272 * before we came here... */
1274 SET_IRQ_HANDLER( NULL
);
1275 /* If the timeout occurred while the readtrack_check timer was
1276 * active, we need to cancel it, else bad things will happen */
1278 del_timer( &readtrack_timer
);
1279 FDC_WRITE( FDCREG_CMD
, FDCCMD_FORCI
);
1282 printk(KERN_ERR
"floppy timeout\n" );
1285 atari_enable_irq( IRQ_MFP_FDC
);
1289 /* The (noop) seek operation here is needed to make the WP bit in the
1290 * FDC status register accessible for check_change. If the last disk
1291 * operation would have been a RDSEC, this bit would always read as 0
1292 * no matter what :-( To save time, the seek goes to the track we're
1296 static void finish_fdc( void )
1299 finish_fdc_done( 0 );
1302 DPRINT(("finish_fdc: dummy seek started\n"));
1303 FDC_WRITE (FDCREG_DATA
, SUD
.track
);
1304 SET_IRQ_HANDLER( finish_fdc_done
);
1305 FDC_WRITE (FDCREG_CMD
, FDCCMD_SEEK
);
1308 /* we must wait for the IRQ here, because the ST-DMA
1309 is released immediately afterwards and the interrupt
1310 may be delivered to the wrong driver. */
1315 static void finish_fdc_done( int dummy
)
1317 unsigned long flags
;
1319 DPRINT(("finish_fdc_done entered\n"));
1323 if ((timer_active
& (1 << FLOPPY_TIMER
)) &&
1324 timer_table
[FLOPPY_TIMER
].expires
< jiffies
+ 5)
1325 /* If the check for a disk change is done too early after this
1326 * last seek command, the WP bit still reads wrong :-((
1328 timer_table
[FLOPPY_TIMER
].expires
= jiffies
+ 5;
1330 START_CHECK_CHANGE_TIMER( CHECK_CHANGE_DELAY
);
1331 del_timer( &motor_off_timer
);
1332 START_MOTOR_OFF_TIMER( FD_MOTOR_OFF_DELAY
);
1338 wake_up( &fdc_wait
);
1339 restore_flags(flags
);
1341 DPRINT(("finish_fdc() finished\n"));
1345 /* Prevent "aliased" accesses. */
1346 static int fd_ref
[4] = { 0,0,0,0 };
1347 static int fd_device
[4] = { 0,0,0,0 };
1350 * Current device number. Taken either from the block header or from the
1351 * format request descriptor.
1353 #define CURRENT_DEVICE (CURRENT->rq_dev)
1355 /* Current error count. */
1356 #define CURRENT_ERRORS (CURRENT->errors)
1359 /* dummy for blk.h */
1360 static void floppy_off( unsigned int nr
) {}
1363 /* The detection of disk changes is a dark chapter in Atari history :-(
1364 * Because the "Drive ready" signal isn't present in the Atari
1365 * hardware, one has to rely on the "Write Protect". This works fine,
1366 * as long as no write protected disks are used. TOS solves this
1367 * problem by introducing tri-state logic ("maybe changed") and
1368 * looking at the serial number in block 0. This isn't possible for
1369 * Linux, since the floppy driver can't make assumptions about the
1370 * filesystem used on the disk and thus the contents of block 0. I've
1371 * chosen the method to always say "The disk was changed" if it is
1372 * unsure whether it was. This implies that every open or mount
1373 * invalidates the disk buffers if you work with write protected
1374 * disks. But at least this is better than working with incorrect data
1375 * due to unrecognised disk changes.
1378 static int check_floppy_change (kdev_t dev
)
1380 unsigned int drive
= MINOR(dev
) & 0x03;
1382 if (MAJOR(dev
) != MAJOR_NR
) {
1383 printk(KERN_ERR
"floppy_changed: not a floppy\n");
1387 if (test_bit (drive
, &fake_change
)) {
1388 /* simulated change (e.g. after formatting) */
1391 if (test_bit (drive
, &changed_floppies
)) {
1392 /* surely changed (the WP signal changed at least once) */
1396 /* WP is on -> could be changed: to be sure, buffers should be
1405 static int floppy_revalidate (kdev_t dev
)
1407 int drive
= MINOR(dev
) & 3;
1409 if (test_bit(drive
, &changed_floppies
) ||
1410 test_bit(drive
, &fake_change
) ||
1411 unit
[drive
].disktype
== 0) {
1412 if (UD
.flags
& FTD_MSG
)
1413 printk(KERN_ERR
"floppy: clear format %p!\n", UDT
);
1415 clear_bit(drive
, &fake_change
);
1416 clear_bit(drive
, &changed_floppies
);
1417 /* MSch: clearing geometry makes sense only for autoprobe
1418 formats, for 'permanent user-defined' parameter:
1419 restore default_params[] here if flagged valid! */
1420 if (default_params
[drive
].blocks
== 0)
1423 UDT
= &default_params
[drive
];
1428 static __inline__
void copy_buffer(void *from
, void *to
)
1430 ulong
*p1
= (ulong
*)from
, *p2
= (ulong
*)to
;
1433 for( cnt
= 512/4; cnt
; cnt
-- )
1438 /* This sets up the global variables describing the current request. */
1440 static void setup_req_params( int drive
)
1442 int block
= ReqBlock
+ ReqCnt
;
1444 ReqTrack
= block
/ UDT
->spt
;
1445 ReqSector
= block
- ReqTrack
* UDT
->spt
+ 1;
1446 ReqSide
= ReqTrack
& 1;
1448 ReqData
= ReqBuffer
+ 512 * ReqCnt
;
1451 read_track
= (ReqCmd
== READ
&& CURRENT_ERRORS
== 0);
1455 DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide
,
1456 ReqTrack
, ReqSector
, (unsigned long)ReqData
));
1460 static void redo_fd_request(void)
1462 int device
, drive
, type
;
1464 DPRINT(("redo_fd_request: CURRENT=%08lx CURRENT->dev=%04x CURRENT->sector=%ld\n",
1465 (unsigned long)CURRENT
, CURRENT
? CURRENT
->rq_dev
: 0,
1466 CURRENT
? CURRENT
->sector
: 0 ));
1470 if (CURRENT
&& CURRENT
->rq_status
== RQ_INACTIVE
){
1479 if (MAJOR(CURRENT
->rq_dev
) != MAJOR_NR
)
1480 panic(DEVICE_NAME
": request list destroyed");
1482 if (CURRENT
->bh
&& !buffer_locked(CURRENT
->bh
))
1483 panic(DEVICE_NAME
": block not locked");
1485 device
= MINOR(CURRENT_DEVICE
);
1489 if (!UD
.connected
) {
1490 /* drive not connected */
1491 printk(KERN_ERR
"Unknown Device: fd%d\n", drive
);
1499 UDT
= disk_type
+ StartDiskType
[DriveType
];
1500 floppy_sizes
[drive
] = UDT
->blocks
>> 1;
1505 /* user supplied disk type */
1506 if (--type
>= NUM_DISK_MINORS
) {
1507 printk(KERN_WARNING
"fd%d: invalid disk format", drive
);
1511 if (minor2disktype
[type
].drive_types
> DriveType
) {
1512 printk(KERN_WARNING
"fd%d: unsupported disk format", drive
);
1516 type
= minor2disktype
[type
].index
;
1517 UDT
= &disk_type
[type
];
1518 floppy_sizes
[drive
] = UDT
->blocks
>> 1;
1522 if (CURRENT
->sector
+ 1 > UDT
->blocks
) {
1527 /* stop deselect timer */
1528 del_timer( &motor_off_timer
);
1531 ReqCmd
= CURRENT
->cmd
;
1532 ReqBlock
= CURRENT
->sector
;
1533 ReqBuffer
= CURRENT
->buffer
;
1534 setup_req_params( drive
);
1535 do_fd_action( drive
);
1544 void do_fd_request(void)
1546 unsigned long flags
;
1548 DPRINT(("do_fd_request for pid %d\n",current
->pid
));
1549 while( fdc_busy
) sleep_on( &fdc_wait
);
1551 stdma_lock(floppy_irq
, NULL
);
1553 atari_disable_irq( IRQ_MFP_FDC
);
1554 save_flags(flags
); /* The request function is called with ints
1555 sti(); * disabled... so must save the IPL for later */
1557 restore_flags(flags
);
1558 atari_enable_irq( IRQ_MFP_FDC
);
1562 static int invalidate_drive(kdev_t rdev
)
1564 /* invalidate the buffer track to force a reread */
1566 set_bit(MINOR(rdev
) & 3, &fake_change
);
1567 check_disk_change(rdev
);
1571 static int fd_ioctl(struct inode
*inode
, struct file
*filp
,
1572 unsigned int cmd
, unsigned long param
)
1574 #define IOCTL_MODE_BIT 8
1575 #define OPEN_WRITE_BIT 16
1576 #define IOCTL_ALLOWED (filp && (filp->f_mode & IOCTL_MODE_BIT))
1580 struct atari_format_descr fmt_desc
;
1581 struct atari_disk_type
*dtp
;
1582 struct floppy_struct getprm
;
1584 struct floppy_struct setprm
;
1586 device
= inode
->i_rdev
;
1593 return blk_ioctl(device
, cmd
, param
);
1595 drive
= MINOR (device
);
1602 if (--type
>= NUM_DISK_MINORS
)
1604 if (minor2disktype
[type
].drive_types
> DriveType
)
1606 type
= minor2disktype
[type
].index
;
1607 dtp
= &disk_type
[type
];
1608 if (UD
.flags
& FTD_MSG
)
1609 printk (KERN_ERR
"floppy%d: found dtp %p name %s!\n",
1610 drive
, dtp
, dtp
->name
);
1618 if (cmd
== BLKGETSIZE
)
1619 return put_user(dtp
->blocks
, (long *)param
);
1621 memset((void *)&getprm
, 0, sizeof(getprm
));
1622 getprm
.size
= dtp
->blocks
;
1623 getprm
.sect
= dtp
->spt
;
1625 getprm
.track
= dtp
->blocks
/dtp
->spt
/2;
1626 getprm
.stretch
= dtp
->stretch
;
1627 if (copy_to_user((void *)param
, &getprm
, sizeof(getprm
)))
1637 * MSch 7/96: simple 'set geometry' case: just set the
1638 * 'default' device params (minor == 0).
1639 * Currently, the drive geometry is cleared after each
1640 * disk change and subsequent revalidate()! simple
1641 * implementation of FDDEFPRM: save geometry from a
1642 * FDDEFPRM call and restore it in floppy_revalidate() !
1645 /* get the parameters from user space */
1646 if (fd_ref
[drive
] != 1 && fd_ref
[drive
] != -1)
1648 if (copy_from_user(&setprm
, (void *) param
, sizeof(setprm
)))
1651 * first of all: check for floppy change and revalidate,
1652 * or the next access will revalidate - and clear UDT :-(
1655 if (check_floppy_change(device
))
1656 floppy_revalidate(device
);
1658 if (UD
.flags
& FTD_MSG
)
1659 printk (KERN_INFO
"floppy%d: setting size %d spt %d str %d!\n",
1660 drive
, setprm
.size
, setprm
.sect
, setprm
.stretch
);
1662 /* what if type > 0 here? Overwrite specified entry ? */
1664 /* refuse to re-set a predefined type for now */
1670 * type == 0: first look for a matching entry in the type list,
1671 * and set the UD.disktype field to use the perdefined entry.
1672 * TODO: add user-defined format to head of autoprobe list ?
1673 * Useful to include the user-type for future autodetection!
1676 for (settype
= 0; settype
< NUM_DISK_MINORS
; settype
++) {
1678 if (minor2disktype
[settype
].drive_types
> DriveType
) {
1679 /* skip this one, invalid for drive ... */
1682 setidx
= minor2disktype
[settype
].index
;
1683 dtp
= &disk_type
[setidx
];
1685 /* found matching entry ?? */
1686 if ( dtp
->blocks
== setprm
.size
1687 && dtp
->spt
== setprm
.sect
1688 && dtp
->stretch
== setprm
.stretch
) {
1689 if (UD
.flags
& FTD_MSG
)
1690 printk (KERN_INFO
"floppy%d: setting %s %p!\n",
1691 drive
, dtp
->name
, dtp
);
1693 floppy_sizes
[drive
] = UDT
->blocks
>> 1;
1695 if (cmd
== FDDEFPRM
) {
1696 /* save settings as permanent default type */
1697 default_params
[drive
].name
= dtp
->name
;
1698 default_params
[drive
].spt
= dtp
->spt
;
1699 default_params
[drive
].blocks
= dtp
->blocks
;
1700 default_params
[drive
].fdc_speed
= dtp
->fdc_speed
;
1701 default_params
[drive
].stretch
= dtp
->stretch
;
1709 /* no matching disk type found above - setting user_params */
1711 if (cmd
== FDDEFPRM
) {
1712 /* set permanent type */
1713 dtp
= &default_params
[drive
];
1715 /* set user type (reset by disk change!) */
1716 dtp
= &user_params
[drive
];
1718 dtp
->name
= "user format";
1719 dtp
->blocks
= setprm
.size
;
1720 dtp
->spt
= setprm
.sect
;
1721 if (setprm
.sect
> 14)
1725 dtp
->stretch
= setprm
.stretch
;
1727 if (UD
.flags
& FTD_MSG
)
1728 printk (KERN_INFO
"floppy%d: blk %d spt %d str %d!\n",
1729 drive
, dtp
->blocks
, dtp
->spt
, dtp
->stretch
);
1732 if (!dtp
|| setprm
.track
!= dtp
->blocks
/dtp
->spt
/2 ||
1739 floppy_sizes
[drive
] = UDT
->blocks
>> 1;
1743 UD
.flags
|= FTD_MSG
;
1746 UD
.flags
&= ~FTD_MSG
;
1748 case FDSETEMSGTRESH
:
1753 if (fd_ref
[drive
] != 1 && fd_ref
[drive
] != -1)
1755 if (copy_from_user(&fmt_desc
, (void *) param
, sizeof(fmt_desc
)))
1757 return do_format(device
, &fmt_desc
);
1760 /* MSch: invalidate default_params */
1761 default_params
[drive
].blocks
= 0;
1762 floppy_sizes
[drive
] = MAX_DISK_SIZE
;
1763 return invalidate_drive (device
);
1766 return invalidate_drive(device
);
1772 /* Initialize the 'unit' variable for drive 'drive' */
1774 __initfunc(static void fd_probe( int drive
))
1779 if (!fd_test_drive_present( drive
))
1784 switch( UserSteprate
[drive
] ) {
1786 UD
.steprate
= FDCSTEP_2
;
1789 UD
.steprate
= FDCSTEP_3
;
1792 UD
.steprate
= FDCSTEP_6
;
1795 UD
.steprate
= FDCSTEP_12
;
1797 default: /* should be -1 for "not set by user" */
1798 if (ATARIHW_PRESENT( FDCSPEED
) || MACH_IS_MEDUSA
)
1799 UD
.steprate
= FDCSTEP_3
;
1801 UD
.steprate
= FDCSTEP_6
;
1804 MotorOn
= 1; /* from probe restore operation! */
1808 /* This function tests the physical presence of a floppy drive (not
1809 * whether a disk is inserted). This is done by issuing a restore
1810 * command, waiting max. 2 seconds (that should be enough to move the
1811 * head across the whole disk) and looking at the state of the "TR00"
1812 * signal. This should now be raised if there is a drive connected
1813 * (and there is no hardware failure :-) Otherwise, the drive is
1817 __initfunc(static int fd_test_drive_present( int drive
))
1819 unsigned long timeout
;
1820 unsigned char status
;
1823 if (drive
>= (MACH_IS_FALCON
? 1 : 2)) return( 0 );
1824 fd_select_drive( drive
);
1826 /* disable interrupt temporarily */
1827 atari_turnoff_irq( IRQ_MFP_FDC
);
1828 FDC_WRITE (FDCREG_TRACK
, 0xff00);
1829 FDC_WRITE( FDCREG_CMD
, FDCCMD_RESTORE
| FDCCMDADD_H
| FDCSTEP_6
);
1831 for( ok
= 0, timeout
= jiffies
+ 2*HZ
+HZ
/2; time_before(jiffies
, timeout
); ) {
1832 if (!(mfp
.par_dt_reg
& 0x20))
1836 status
= FDC_READ( FDCREG_STATUS
);
1837 ok
= (status
& FDCSTAT_TR00
) != 0;
1839 /* force interrupt to abort restore operation (FDC would try
1840 * about 50 seconds!) */
1841 FDC_WRITE( FDCREG_CMD
, FDCCMD_FORCI
);
1843 status
= FDC_READ( FDCREG_STATUS
);
1847 /* dummy seek command to make WP bit accessible */
1848 FDC_WRITE( FDCREG_DATA
, 0 );
1849 FDC_WRITE( FDCREG_CMD
, FDCCMD_SEEK
);
1850 while( mfp
.par_dt_reg
& 0x20 )
1852 status
= FDC_READ( FDCREG_STATUS
);
1855 atari_turnon_irq( IRQ_MFP_FDC
);
1860 /* Look how many and which kind of drives are connected. If there are
1861 * floppies, additionally start the disk-change and motor-off timers.
1864 __initfunc(static void config_types( void ))
1868 /* for probing drives, set the FDC speed to 8 MHz */
1869 if (ATARIHW_PRESENT(FDCSPEED
))
1870 dma_wd
.fdc_speed
= 0;
1872 printk(KERN_INFO
"Probing floppy drive(s):\n");
1873 for( drive
= 0; drive
< FD_MAX_UNITS
; drive
++ ) {
1876 printk(KERN_INFO
"fd%d\n", drive
);
1881 if (FDC_READ( FDCREG_STATUS
) & FDCSTAT_BUSY
) {
1882 /* If FDC is still busy from probing, give it another FORCI
1883 * command to abort the operation. If this isn't done, the FDC
1884 * will interrupt later and its IRQ line stays low, because
1885 * the status register isn't read. And this will block any
1886 * interrupts on this IRQ line :-(
1888 FDC_WRITE( FDCREG_CMD
, FDCCMD_FORCI
);
1890 FDC_READ( FDCREG_STATUS
);
1895 START_MOTOR_OFF_TIMER( FD_MOTOR_OFF_DELAY
);
1896 if (cnt
== 1) fd_select_drive( 0 );
1897 START_CHECK_CHANGE_TIMER( CHECK_CHANGE_DELAY
);
1902 * floppy_open check for aliasing (/dev/fd0 can be the same as
1903 * /dev/PS0 etc), and disallows simultaneous access to the same
1904 * drive with different device numbers.
1907 static int floppy_open( struct inode
*inode
, struct file
*filp
)
1913 DPRINT (("Weird, open called with filp=0\n"));
1917 drive
= MINOR(inode
->i_rdev
) & 3;
1918 type
= MINOR(inode
->i_rdev
) >> 2;
1919 DPRINT(("fd_open: type=%d\n",type
));
1920 if (drive
>= FD_MAX_UNITS
|| type
> NUM_DISK_MINORS
)
1923 old_dev
= fd_device
[drive
];
1925 if (fd_ref
[drive
] && old_dev
!= MINOR(inode
->i_rdev
))
1928 if (fd_ref
[drive
] == -1 || (fd_ref
[drive
] && filp
->f_flags
& O_EXCL
))
1933 if (filp
->f_flags
& O_EXCL
)
1938 fd_device
[drive
] = MINOR(inode
->i_rdev
);
1940 if (old_dev
&& old_dev
!= MINOR(inode
->i_rdev
))
1941 invalidate_buffers(MKDEV(FLOPPY_MAJOR
, old_dev
));
1943 /* Allow ioctls if we have write-permissions even if read-only open */
1944 if (filp
->f_mode
& 2 || permission (inode
, 2) == 0)
1945 filp
->f_mode
|= IOCTL_MODE_BIT
;
1946 if (filp
->f_mode
& 2)
1947 filp
->f_mode
|= OPEN_WRITE_BIT
;
1949 if (filp
->f_flags
& O_NDELAY
)
1952 if (filp
->f_mode
& 3) {
1953 check_disk_change(inode
->i_rdev
);
1954 if (filp
->f_mode
& 2) {
1956 floppy_release(inode
, filp
);
1966 static int floppy_release( struct inode
* inode
, struct file
* filp
)
1970 drive
= MINOR(inode
->i_rdev
) & 3;
1973 * If filp is NULL, we're being called from blkdev_release
1974 * or after a failed mount attempt. In the former case the
1975 * device has already been sync'ed, and in the latter no
1976 * sync is required. Otherwise, sync if filp is writable.
1978 if (filp
&& (filp
->f_mode
& (2 | OPEN_WRITE_BIT
)))
1979 block_fsync (filp
, filp
->f_dentry
);
1981 if (fd_ref
[drive
] < 0)
1983 else if (!fd_ref
[drive
]--) {
1984 printk(KERN_ERR
"floppy_release with fd_ref == 0");
1992 static struct file_operations floppy_fops
= {
1993 NULL
, /* lseek - default */
1994 block_read
, /* read - general block-dev read */
1995 block_write
, /* write - general block-dev write */
1996 NULL
, /* readdir - bad */
1998 fd_ioctl
, /* ioctl */
2000 floppy_open
, /* open */
2002 floppy_release
, /* release */
2003 block_fsync
, /* fsync */
2005 check_floppy_change
, /* media_change */
2006 floppy_revalidate
, /* revalidate */
2009 __initfunc(int atari_floppy_init (void))
2014 /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */
2018 /* Hades doesn't have Atari-compatible floppy */
2021 if (register_blkdev(MAJOR_NR
,"fd",&floppy_fops
)) {
2022 printk(KERN_ERR
"Unable to get major %d for floppy\n",MAJOR_NR
);
2026 if (UseTrackbuffer
< 0)
2027 /* not set by user -> use default: for now, we turn
2028 track buffering off for all Medusas, though it
2029 could be used with ones that have a counter
2030 card. But the test is too hard :-( */
2031 UseTrackbuffer
= !MACH_IS_MEDUSA
;
2033 /* initialize variables */
2037 /* initialize check_change timer */
2038 timer_table
[FLOPPY_TIMER
].fn
= check_change
;
2039 timer_active
&= ~(1 << FLOPPY_TIMER
);
2041 DMABuffer
= atari_stram_alloc( BUFFER_SIZE
+512, NULL
, "ataflop" );
2043 printk(KERN_ERR
"atari_floppy_init: cannot get dma buffer\n");
2044 unregister_blkdev(MAJOR_NR
, "fd");
2047 TrackBuffer
= DMABuffer
+ 512;
2048 PhysDMABuffer
= (unsigned long) VTOP(DMABuffer
);
2049 PhysTrackBuffer
= (unsigned long) VTOP(TrackBuffer
);
2050 BufferDrive
= BufferSide
= BufferTrack
= -1;
2052 for (i
= 0; i
< FD_MAX_UNITS
; i
++) {
2057 for (i
= 0; i
< 256; i
++)
2058 if ((i
>> 2) > 0 && (i
>> 2) <= NUM_DISK_MINORS
) {
2059 int type
= minor2disktype
[(i
>> 2) - 1].index
;
2060 floppy_sizes
[i
] = disk_type
[type
].blocks
>> 1;
2062 floppy_sizes
[i
] = MAX_DISK_SIZE
;
2064 blk_size
[MAJOR_NR
] = floppy_sizes
;
2065 blksize_size
[MAJOR_NR
] = floppy_blocksizes
;
2066 blk_dev
[MAJOR_NR
].request_fn
= DEVICE_REQUEST
;
2068 printk(KERN_INFO
"Atari floppy driver: max. %cD, %strack buffering\n",
2069 DriveType
== 0 ? 'D' : DriveType
== 1 ? 'H' : 'E',
2070 UseTrackbuffer
? "" : "no ");
2073 (void)do_floppy
; /* avoid warning about unused variable */
2078 __initfunc(void atari_floppy_setup( char *str
, int *ints
))
2083 printk(KERN_ERR
"ataflop_setup: no arguments!\n" );
2086 else if (ints
[0] > 2+FD_MAX_UNITS
) {
2087 printk(KERN_ERR
"ataflop_setup: too many arguments\n" );
2090 if (ints
[1] < 0 || ints
[1] > 2)
2091 printk(KERN_ERR
"ataflop_setup: bad drive type\n" );
2093 DriveType
= ints
[1];
2096 UseTrackbuffer
= (ints
[2] > 0);
2098 for( i
= 3; i
<= ints
[0] && i
-3 < FD_MAX_UNITS
; ++i
) {
2099 if (ints
[i
] != 2 && ints
[i
] != 3 && ints
[i
] != 6 && ints
[i
] != 12)
2100 printk(KERN_ERR
"ataflop_setup: bad steprate\n" );
2102 UserSteprate
[i
-3] = ints
[i
];
2107 int init_module (void)
2111 return atari_floppy_init ();
2114 void cleanup_module (void)
2116 unregister_blkdev(MAJOR_NR
, "fd");
2118 blk_dev
[MAJOR_NR
].request_fn
= 0;
2119 timer_active
&= ~(1 << FLOPPY_TIMER
);
2120 timer_table
[FLOPPY_TIMER
].fn
= 0;
2121 atari_stram_free( DMABuffer
);