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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target...
[linux-btrfs-devel.git] / drivers / block / ataflop.c
blobede16c64ff07dbb524cdf84ba8e3622d9efe306b
1 /*
2 * drivers/block/ataflop.c
3 *
4 * Copyright (C) 1993 Greg Harp
5 * Atari Support by Bjoern Brauel, Roman Hodek
6 *
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
12 * similar to TOS
13 * - Autodetection of disk format (DD/HD); untested yet, because I
14 * don't have an HD drive :-(
15 *
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
21 *
22 * Changes by Andreas Schwab:
23 * - After errors in multiple read mode try again reading single sectors
24 * (Feb 1995):
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
29 *
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...
33 *
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()
40 * Roman:
41 * - Make disk format numbering independent from minors
42 * - Let user set max. supported drive type (speeds up format
43 * detection, saves buffer space)
44 *
45 * Roman 10/15/95:
46 * - implement some more ioctls
47 * - disk formatting
48 *
49 * Andreas 95/12/12:
50 * - increase gap size at start of track for HD/ED disks
51 *
52 * Michael (MSch) 11/07/96:
53 * - implemented FDSETPRM and FDDEFPRM ioctl
54 *
55 * Andreas (97/03/19):
56 * - implemented missing BLK* ioctls
57 *
58 * Things left to do:
59 * - Formatting
60 * - Maybe a better strategy for disk change detection (does anyone
61 * know one?)
62 */
63
64 #include <linux/module.h>
65
66 #include <linux/fd.h>
67 #include <linux/delay.h>
68 #include <linux/init.h>
69 #include <linux/blkdev.h>
70 #include <linux/mutex.h>
71
72 #include <asm/atafd.h>
73 #include <asm/atafdreg.h>
74 #include <asm/atariints.h>
75 #include <asm/atari_stdma.h>
76 #include <asm/atari_stram.h>
77
78 #define FD_MAX_UNITS 2
79
80 #undef DEBUG
81
82 static DEFINE_MUTEX(ataflop_mutex);
83 static struct request *fd_request;
84 static int fdc_queue;
85
86 /* Disk types: DD, HD, ED */
87 static struct atari_disk_type {
88 const char *name;
89 unsigned spt; /* sectors per track */
90 unsigned blocks; /* total number of blocks */
91 unsigned fdc_speed; /* fdc_speed setting */
92 unsigned stretch; /* track doubling ? */
93 } atari_disk_type[] = {
94 { "d360", 9, 720, 0, 0}, /* 0: 360kB diskette */
95 { "D360", 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */
96 { "D720", 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */
97 { "D820", 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */
98 /* formats above are probed for type DD */
99 #define MAX_TYPE_DD 3
100 { "h1200",15,2400, 3, 0}, /* 4: 1.2MB diskette */
101 { "H1440",18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */
102 { "H1640",20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */
103 /* formats above are probed for types DD and HD */
104 #define MAX_TYPE_HD 6
105 { "E2880",36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */
106 { "E3280",40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */
107 /* formats above are probed for types DD, HD and ED */
108 #define MAX_TYPE_ED 8
109 /* types below are never autoprobed */
110 { "H1680",21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */
111 { "h410",10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */
112 { "h1476",18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */
113 { "H1722",21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */
114 { "h420",10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */
115 { "H830",10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */
116 { "h1494",18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */
117 { "H1743",21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */
118 { "h880",11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */
119 { "D1040",13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */
120 { "D1120",14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */
121 { "h1600",20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */
122 { "H1760",22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */
123 { "H1920",24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */
124 { "E3200",40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */
125 { "E3520",44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */
126 { "E3840",48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */
127 { "H1840",23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */
128 { "D800",10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */
129 };
130
131 static int StartDiskType[] = {
132 MAX_TYPE_DD,
133 MAX_TYPE_HD,
134 MAX_TYPE_ED
135 };
136
137 #define TYPE_DD 0
138 #define TYPE_HD 1
139 #define TYPE_ED 2
140
141 static int DriveType = TYPE_HD;
142
143 static DEFINE_SPINLOCK(ataflop_lock);
144
145 /* Array for translating minors into disk formats */
146 static struct {
147 int index;
148 unsigned drive_types;
149 } minor2disktype[] = {
150 { 0, TYPE_DD }, /* 1: d360 */
151 { 4, TYPE_HD }, /* 2: h1200 */
152 { 1, TYPE_DD }, /* 3: D360 */
153 { 2, TYPE_DD }, /* 4: D720 */
154 { 1, TYPE_DD }, /* 5: h360 = D360 */
155 { 2, TYPE_DD }, /* 6: h720 = D720 */
156 { 5, TYPE_HD }, /* 7: H1440 */
157 { 7, TYPE_ED }, /* 8: E2880 */
158 /* some PC formats :-) */
159 { 8, TYPE_ED }, /* 9: E3280 <- was "CompaQ" == E2880 for PC */
160 { 5, TYPE_HD }, /* 10: h1440 = H1440 */
161 { 9, TYPE_HD }, /* 11: H1680 */
162 { 10, TYPE_DD }, /* 12: h410 */
163 { 3, TYPE_DD }, /* 13: H820 <- == D820, 82x10 */
164 { 11, TYPE_HD }, /* 14: h1476 */
165 { 12, TYPE_HD }, /* 15: H1722 */
166 { 13, TYPE_DD }, /* 16: h420 */
167 { 14, TYPE_DD }, /* 17: H830 */
168 { 15, TYPE_HD }, /* 18: h1494 */
169 { 16, TYPE_HD }, /* 19: H1743 */
170 { 17, TYPE_DD }, /* 20: h880 */
171 { 18, TYPE_DD }, /* 21: D1040 */
172 { 19, TYPE_DD }, /* 22: D1120 */
173 { 20, TYPE_HD }, /* 23: h1600 */
174 { 21, TYPE_HD }, /* 24: H1760 */
175 { 22, TYPE_HD }, /* 25: H1920 */
176 { 23, TYPE_ED }, /* 26: E3200 */
177 { 24, TYPE_ED }, /* 27: E3520 */
178 { 25, TYPE_ED }, /* 28: E3840 */
179 { 26, TYPE_HD }, /* 29: H1840 */
180 { 27, TYPE_DD }, /* 30: D800 */
181 { 6, TYPE_HD }, /* 31: H1640 <- was H1600 == h1600 for PC */
182 };
183
184 #define NUM_DISK_MINORS ARRAY_SIZE(minor2disktype)
185
186 /*
187 * Maximum disk size (in kilobytes). This default is used whenever the
188 * current disk size is unknown.
189 */
190 #define MAX_DISK_SIZE 3280
191
192 /*
193 * MSch: User-provided type information. 'drive' points to
194 * the respective entry of this array. Set by FDSETPRM ioctls.
195 */
196 static struct atari_disk_type user_params[FD_MAX_UNITS];
197
198 /*
199 * User-provided permanent type information. 'drive' points to
200 * the respective entry of this array. Set by FDDEFPRM ioctls,
201 * restored upon disk change by floppy_revalidate() if valid (as seen by
202 * default_params[].blocks > 0 - a bit in unit[].flags might be used for this?)
203 */
204 static struct atari_disk_type default_params[FD_MAX_UNITS];
205
206 /* current info on each unit */
207 static struct atari_floppy_struct {
208 int connected; /* !=0 : drive is connected */
209 int autoprobe; /* !=0 : do autoprobe */
210
211 struct atari_disk_type *disktype; /* current type of disk */
212
213 int track; /* current head position or -1 if
214 unknown */
215 unsigned int steprate; /* steprate setting */
216 unsigned int wpstat; /* current state of WP signal (for
217 disk change detection) */
218 int flags; /* flags */
219 struct gendisk *disk;
220 int ref;
221 int type;
222 } unit[FD_MAX_UNITS];
223
224 #define UD unit[drive]
225 #define UDT unit[drive].disktype
226 #define SUD unit[SelectedDrive]
227 #define SUDT unit[SelectedDrive].disktype
228
229
230 #define FDC_READ(reg) ({ \
231 /* unsigned long __flags; */ \
232 unsigned short __val; \
233 /* local_irq_save(__flags); */ \
234 dma_wd.dma_mode_status = 0x80 | (reg); \
235 udelay(25); \
236 __val = dma_wd.fdc_acces_seccount; \
237 MFPDELAY(); \
238 /* local_irq_restore(__flags); */ \
239 __val & 0xff; \
240 })
241
242 #define FDC_WRITE(reg,val) \
243 do { \
244 /* unsigned long __flags; */ \
245 /* local_irq_save(__flags); */ \
246 dma_wd.dma_mode_status = 0x80 | (reg); \
247 udelay(25); \
248 dma_wd.fdc_acces_seccount = (val); \
249 MFPDELAY(); \
250 /* local_irq_restore(__flags); */ \
251 } while(0)
252
253
254 /* Buffering variables:
255 * First, there is a DMA buffer in ST-RAM that is used for floppy DMA
256 * operations. Second, a track buffer is used to cache a whole track
257 * of the disk to save read operations. These are two separate buffers
258 * because that allows write operations without clearing the track buffer.
259 */
260
261 static int MaxSectors[] = {
262 11, 22, 44
263 };
264 static int BufferSize[] = {
265 15*512, 30*512, 60*512
266 };
267
268 #define BUFFER_SIZE (BufferSize[DriveType])
269
270 unsigned char *DMABuffer; /* buffer for writes */
271 static unsigned long PhysDMABuffer; /* physical address */
272
273 static int UseTrackbuffer = -1; /* Do track buffering? */
274 module_param(UseTrackbuffer, int, 0);
275
276 unsigned char *TrackBuffer; /* buffer for reads */
277 static unsigned long PhysTrackBuffer; /* physical address */
278 static int BufferDrive, BufferSide, BufferTrack;
279 static int read_track; /* non-zero if we are reading whole tracks */
280
281 #define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512)
282 #define IS_BUFFERED(drive,side,track) \
283 (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track))
284
285 /*
286 * These are global variables, as that's the easiest way to give
287 * information to interrupts. They are the data used for the current
288 * request.
289 */
290 static int SelectedDrive = 0;
291 static int ReqCmd, ReqBlock;
292 static int ReqSide, ReqTrack, ReqSector, ReqCnt;
293 static int HeadSettleFlag = 0;
294 static unsigned char *ReqData, *ReqBuffer;
295 static int MotorOn = 0, MotorOffTrys;
296 static int IsFormatting = 0, FormatError;
297
298 static int UserSteprate[FD_MAX_UNITS] = { -1, -1 };
299 module_param_array(UserSteprate, int, NULL, 0);
300
301 /* Synchronization of FDC access. */
302 static volatile int fdc_busy = 0;
303 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
304 static DECLARE_WAIT_QUEUE_HEAD(format_wait);
305
306 static unsigned long changed_floppies = 0xff, fake_change = 0;
307 #define CHECK_CHANGE_DELAY HZ/2
308
309 #define FD_MOTOR_OFF_DELAY (3*HZ)
310 #define FD_MOTOR_OFF_MAXTRY (10*20)
311
312 #define FLOPPY_TIMEOUT (6*HZ)
313 #define RECALIBRATE_ERRORS 4 /* After this many errors the drive
314 * will be recalibrated. */
315 #define MAX_ERRORS 8 /* After this many errors the driver
316 * will give up. */
317
318
319 /*
320 * The driver is trying to determine the correct media format
321 * while Probing is set. fd_rwsec_done() clears it after a
322 * successful access.
323 */
324 static int Probing = 0;
325
326 /* This flag is set when a dummy seek is necessary to make the WP
327 * status bit accessible.
328 */
329 static int NeedSeek = 0;
330
331
332 #ifdef DEBUG
333 #define DPRINT(a) printk a
334 #else
335 #define DPRINT(a)
336 #endif
337
338 /***************************** Prototypes *****************************/
339
340 static void fd_select_side( int side );
341 static void fd_select_drive( int drive );
342 static void fd_deselect( void );
343 static void fd_motor_off_timer( unsigned long dummy );
344 static void check_change( unsigned long dummy );
345 static irqreturn_t floppy_irq (int irq, void *dummy);
346 static void fd_error( void );
347 static int do_format(int drive, int type, struct atari_format_descr *desc);
348 static void do_fd_action( int drive );
349 static void fd_calibrate( void );
350 static void fd_calibrate_done( int status );
351 static void fd_seek( void );
352 static void fd_seek_done( int status );
353 static void fd_rwsec( void );
354 static void fd_readtrack_check( unsigned long dummy );
355 static void fd_rwsec_done( int status );
356 static void fd_rwsec_done1(int status);
357 static void fd_writetrack( void );
358 static void fd_writetrack_done( int status );
359 static void fd_times_out( unsigned long dummy );
360 static void finish_fdc( void );
361 static void finish_fdc_done( int dummy );
362 static void setup_req_params( int drive );
363 static void redo_fd_request( void);
364 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
365 cmd, unsigned long param);
366 static void fd_probe( int drive );
367 static int fd_test_drive_present( int drive );
368 static void config_types( void );
369 static int floppy_open(struct block_device *bdev, fmode_t mode);
370 static int floppy_release(struct gendisk *disk, fmode_t mode);
371
372 /************************* End of Prototypes **************************/
373
374 static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer, 0, 0);
375 static DEFINE_TIMER(readtrack_timer, fd_readtrack_check, 0, 0);
376 static DEFINE_TIMER(timeout_timer, fd_times_out, 0, 0);
377 static DEFINE_TIMER(fd_timer, check_change, 0, 0);
378
379 static void fd_end_request_cur(int err)
380 {
381 if (!__blk_end_request_cur(fd_request, err))
382 fd_request = NULL;
383 }
384
385 static inline void start_motor_off_timer(void)
386 {
387 mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY);
388 MotorOffTrys = 0;
389 }
390
391 static inline void start_check_change_timer( void )
392 {
393 mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY);
394 }
395
396 static inline void start_timeout(void)
397 {
398 mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT);
399 }
400
401 static inline void stop_timeout(void)
402 {
403 del_timer(&timeout_timer);
404 }
405
406 /* Select the side to use. */
407
408 static void fd_select_side( int side )
409 {
410 unsigned long flags;
411
412 /* protect against various other ints mucking around with the PSG */
413 local_irq_save(flags);
414
415 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */
416 sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 :
417 sound_ym.rd_data_reg_sel & 0xfe;
418
419 local_irq_restore(flags);
420 }
421
422
423 /* Select a drive, update the FDC's track register and set the correct
424 * clock speed for this disk's type.
425 */
426
427 static void fd_select_drive( int drive )
428 {
429 unsigned long flags;
430 unsigned char tmp;
431
432 if (drive == SelectedDrive)
433 return;
434
435 /* protect against various other ints mucking around with the PSG */
436 local_irq_save(flags);
437 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */
438 tmp = sound_ym.rd_data_reg_sel;
439 sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1);
440 atari_dont_touch_floppy_select = 1;
441 local_irq_restore(flags);
442
443 /* restore track register to saved value */
444 FDC_WRITE( FDCREG_TRACK, UD.track );
445 udelay(25);
446
447 /* select 8/16 MHz */
448 if (UDT)
449 if (ATARIHW_PRESENT(FDCSPEED))
450 dma_wd.fdc_speed = UDT->fdc_speed;
451
452 SelectedDrive = drive;
453 }
454
455
456 /* Deselect both drives. */
457
458 static void fd_deselect( void )
459 {
460 unsigned long flags;
461
462 /* protect against various other ints mucking around with the PSG */
463 local_irq_save(flags);
464 atari_dont_touch_floppy_select = 0;
465 sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */
466 sound_ym.wd_data = (sound_ym.rd_data_reg_sel |
467 (MACH_IS_FALCON ? 3 : 7)); /* no drives selected */
468 /* On Falcon, the drive B select line is used on the printer port, so
469 * leave it alone... */
470 SelectedDrive = -1;
471 local_irq_restore(flags);
472 }
473
474
475 /* This timer function deselects the drives when the FDC switched the
476 * motor off. The deselection cannot happen earlier because the FDC
477 * counts the index signals, which arrive only if one drive is selected.
478 */
479
480 static void fd_motor_off_timer( unsigned long dummy )
481 {
482 unsigned char status;
483
484 if (SelectedDrive < 0)
485 /* no drive selected, needn't deselect anyone */
486 return;
487
488 if (stdma_islocked())
489 goto retry;
490
491 status = FDC_READ( FDCREG_STATUS );
492
493 if (!(status & 0x80)) {
494 /* motor already turned off by FDC -> deselect drives */
495 MotorOn = 0;
496 fd_deselect();
497 return;
498 }
499 /* not yet off, try again */
500
501 retry:
502 /* Test again later; if tested too often, it seems there is no disk
503 * in the drive and the FDC will leave the motor on forever (or,
504 * at least until a disk is inserted). So we'll test only twice
505 * per second from then on...
506 */
507 mod_timer(&motor_off_timer,
508 jiffies + (MotorOffTrys++ < FD_MOTOR_OFF_MAXTRY ? HZ/20 : HZ/2));
509 }
510
511
512 /* This function is repeatedly called to detect disk changes (as good
513 * as possible) and keep track of the current state of the write protection.
514 */
515
516 static void check_change( unsigned long dummy )
517 {
518 static int drive = 0;
519
520 unsigned long flags;
521 unsigned char old_porta;
522 int stat;
523
524 if (++drive > 1 || !UD.connected)
525 drive = 0;
526
527 /* protect against various other ints mucking around with the PSG */
528 local_irq_save(flags);
529
530 if (!stdma_islocked()) {
531 sound_ym.rd_data_reg_sel = 14;
532 old_porta = sound_ym.rd_data_reg_sel;
533 sound_ym.wd_data = (old_porta | DSKDRVNONE) &
534 ~(drive == 0 ? DSKDRV0 : DSKDRV1);
535 stat = !!(FDC_READ( FDCREG_STATUS ) & FDCSTAT_WPROT);
536 sound_ym.wd_data = old_porta;
537
538 if (stat != UD.wpstat) {
539 DPRINT(( "wpstat[%d] = %d\n", drive, stat ));
540 UD.wpstat = stat;
541 set_bit (drive, &changed_floppies);
542 }
543 }
544 local_irq_restore(flags);
545
546 start_check_change_timer();
547 }
548
549
550 /* Handling of the Head Settling Flag: This flag should be set after each
551 * seek operation, because we don't use seeks with verify.
552 */
553
554 static inline void set_head_settle_flag(void)
555 {
556 HeadSettleFlag = FDCCMDADD_E;
557 }
558
559 static inline int get_head_settle_flag(void)
560 {
561 int tmp = HeadSettleFlag;
562 HeadSettleFlag = 0;
563 return( tmp );
564 }
565
566 static inline void copy_buffer(void *from, void *to)
567 {
568 ulong *p1 = (ulong *)from, *p2 = (ulong *)to;
569 int cnt;
570
571 for (cnt = 512/4; cnt; cnt--)
572 *p2++ = *p1++;
573 }
574
575
576
577
578 /* General Interrupt Handling */
579
580 static void (*FloppyIRQHandler)( int status ) = NULL;
581
582 static irqreturn_t floppy_irq (int irq, void *dummy)
583 {
584 unsigned char status;
585 void (*handler)( int );
586
587 handler = xchg(&FloppyIRQHandler, NULL);
588
589 if (handler) {
590 nop();
591 status = FDC_READ( FDCREG_STATUS );
592 DPRINT(("FDC irq, status = %02x handler = %08lx\n",status,(unsigned long)handler));
593 handler( status );
594 }
595 else {
596 DPRINT(("FDC irq, no handler\n"));
597 }
598 return IRQ_HANDLED;
599 }
600
601
602 /* Error handling: If some error happened, retry some times, then
603 * recalibrate, then try again, and fail after MAX_ERRORS.
604 */
605
606 static void fd_error( void )
607 {
608 if (IsFormatting) {
609 IsFormatting = 0;
610 FormatError = 1;
611 wake_up( &format_wait );
612 return;
613 }
614
615 if (!fd_request)
616 return;
617
618 fd_request->errors++;
619 if (fd_request->errors >= MAX_ERRORS) {
620 printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive );
621 fd_end_request_cur(-EIO);
622 }
623 else if (fd_request->errors == RECALIBRATE_ERRORS) {
624 printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive );
625 if (SelectedDrive != -1)
626 SUD.track = -1;
627 }
628 redo_fd_request();
629 }
630
631
632
633 #define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0)
634
635
636 /* ---------- Formatting ---------- */
637
638 #define FILL(n,val) \
639 do { \
640 memset( p, val, n ); \
641 p += n; \
642 } while(0)
643
644 static int do_format(int drive, int type, struct atari_format_descr *desc)
645 {
646 unsigned char *p;
647 int sect, nsect;
648 unsigned long flags;
649
650 DPRINT(("do_format( dr=%d tr=%d he=%d offs=%d )\n",
651 drive, desc->track, desc->head, desc->sect_offset ));
652
653 local_irq_save(flags);
654 while( fdc_busy ) sleep_on( &fdc_wait );
655 fdc_busy = 1;
656 stdma_lock(floppy_irq, NULL);
657 atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */
658 local_irq_restore(flags);
659
660 if (type) {
661 if (--type >= NUM_DISK_MINORS ||
662 minor2disktype[type].drive_types > DriveType) {
663 redo_fd_request();
664 return -EINVAL;
665 }
666 type = minor2disktype[type].index;
667 UDT = &atari_disk_type[type];
668 }
669
670 if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) {
671 redo_fd_request();
672 return -EINVAL;
673 }
674
675 nsect = UDT->spt;
676 p = TrackBuffer;
677 /* The track buffer is used for the raw track data, so its
678 contents become invalid! */
679 BufferDrive = -1;
680 /* stop deselect timer */
681 del_timer( &motor_off_timer );
682
683 FILL( 60 * (nsect / 9), 0x4e );
684 for( sect = 0; sect < nsect; ++sect ) {
685 FILL( 12, 0 );
686 FILL( 3, 0xf5 );
687 *p++ = 0xfe;
688 *p++ = desc->track;
689 *p++ = desc->head;
690 *p++ = (nsect + sect - desc->sect_offset) % nsect + 1;
691 *p++ = 2;
692 *p++ = 0xf7;
693 FILL( 22, 0x4e );
694 FILL( 12, 0 );
695 FILL( 3, 0xf5 );
696 *p++ = 0xfb;
697 FILL( 512, 0xe5 );
698 *p++ = 0xf7;
699 FILL( 40, 0x4e );
700 }
701 FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e );
702
703 IsFormatting = 1;
704 FormatError = 0;
705 ReqTrack = desc->track;
706 ReqSide = desc->head;
707 do_fd_action( drive );
708
709 sleep_on( &format_wait );
710
711 redo_fd_request();
712 return( FormatError ? -EIO : 0 );
713 }
714
715
716 /* do_fd_action() is the general procedure for a fd request: All
717 * required parameter settings (drive select, side select, track
718 * position) are checked and set if needed. For each of these
719 * parameters and the actual reading or writing exist two functions:
720 * one that starts the setting (or skips it if possible) and one
721 * callback for the "done" interrupt. Each done func calls the next
722 * set function to propagate the request down to fd_rwsec_done().
723 */
724
725 static void do_fd_action( int drive )
726 {
727 DPRINT(("do_fd_action\n"));
728
729 if (UseTrackbuffer && !IsFormatting) {
730 repeat:
731 if (IS_BUFFERED( drive, ReqSide, ReqTrack )) {
732 if (ReqCmd == READ) {
733 copy_buffer( SECTOR_BUFFER(ReqSector), ReqData );
734 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) {
735 /* read next sector */
736 setup_req_params( drive );
737 goto repeat;
738 }
739 else {
740 /* all sectors finished */
741 fd_end_request_cur(0);
742 redo_fd_request();
743 return;
744 }
745 }
746 else {
747 /* cmd == WRITE, pay attention to track buffer
748 * consistency! */
749 copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) );
750 }
751 }
752 }
753
754 if (SelectedDrive != drive)
755 fd_select_drive( drive );
756
757 if (UD.track == -1)
758 fd_calibrate();
759 else if (UD.track != ReqTrack << UDT->stretch)
760 fd_seek();
761 else if (IsFormatting)
762 fd_writetrack();
763 else
764 fd_rwsec();
765 }
766
767
768 /* Seek to track 0 if the current track is unknown */
769
770 static void fd_calibrate( void )
771 {
772 if (SUD.track >= 0) {
773 fd_calibrate_done( 0 );
774 return;
775 }
776
777 if (ATARIHW_PRESENT(FDCSPEED))
778 dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */;
779 DPRINT(("fd_calibrate\n"));
780 SET_IRQ_HANDLER( fd_calibrate_done );
781 /* we can't verify, since the speed may be incorrect */
782 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate );
783
784 NeedSeek = 1;
785 MotorOn = 1;
786 start_timeout();
787 /* wait for IRQ */
788 }
789
790
791 static void fd_calibrate_done( int status )
792 {
793 DPRINT(("fd_calibrate_done()\n"));
794 stop_timeout();
795
796 /* set the correct speed now */
797 if (ATARIHW_PRESENT(FDCSPEED))
798 dma_wd.fdc_speed = SUDT->fdc_speed;
799 if (status & FDCSTAT_RECNF) {
800 printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive );
801 fd_error();
802 }
803 else {
804 SUD.track = 0;
805 fd_seek();
806 }
807 }
808
809
810 /* Seek the drive to the requested track. The drive must have been
811 * calibrated at some point before this.
812 */
813
814 static void fd_seek( void )
815 {
816 if (SUD.track == ReqTrack << SUDT->stretch) {
817 fd_seek_done( 0 );
818 return;
819 }
820
821 if (ATARIHW_PRESENT(FDCSPEED)) {
822 dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */
823 MFPDELAY();
824 }
825
826 DPRINT(("fd_seek() to track %d\n",ReqTrack));
827 FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch);
828 udelay(25);
829 SET_IRQ_HANDLER( fd_seek_done );
830 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate );
831
832 MotorOn = 1;
833 set_head_settle_flag();
834 start_timeout();
835 /* wait for IRQ */
836 }
837
838
839 static void fd_seek_done( int status )
840 {
841 DPRINT(("fd_seek_done()\n"));
842 stop_timeout();
843
844 /* set the correct speed */
845 if (ATARIHW_PRESENT(FDCSPEED))
846 dma_wd.fdc_speed = SUDT->fdc_speed;
847 if (status & FDCSTAT_RECNF) {
848 printk(KERN_ERR "fd%d: seek error (to track %d)\n",
849 SelectedDrive, ReqTrack );
850 /* we don't know exactly which track we are on now! */
851 SUD.track = -1;
852 fd_error();
853 }
854 else {
855 SUD.track = ReqTrack << SUDT->stretch;
856 NeedSeek = 0;
857 if (IsFormatting)
858 fd_writetrack();
859 else
860 fd_rwsec();
861 }
862 }
863
864
865 /* This does the actual reading/writing after positioning the head
866 * over the correct track.
867 */
868
869 static int MultReadInProgress = 0;
870
871
872 static void fd_rwsec( void )
873 {
874 unsigned long paddr, flags;
875 unsigned int rwflag, old_motoron;
876 unsigned int track;
877
878 DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector, ReqCmd == WRITE ? 'w' : 'r' ));
879 if (ReqCmd == WRITE) {
880 if (ATARIHW_PRESENT(EXTD_DMA)) {
881 paddr = virt_to_phys(ReqData);
882 }
883 else {
884 copy_buffer( ReqData, DMABuffer );
885 paddr = PhysDMABuffer;
886 }
887 dma_cache_maintenance( paddr, 512, 1 );
888 rwflag = 0x100;
889 }
890 else {
891 if (read_track)
892 paddr = PhysTrackBuffer;
893 else
894 paddr = ATARIHW_PRESENT(EXTD_DMA) ?
895 virt_to_phys(ReqData) : PhysDMABuffer;
896 rwflag = 0;
897 }
898
899 fd_select_side( ReqSide );
900
901 /* Start sector of this operation */
902 FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector );
903 MFPDELAY();
904 /* Cheat for track if stretch != 0 */
905 if (SUDT->stretch) {
906 track = FDC_READ( FDCREG_TRACK);
907 MFPDELAY();
908 FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch);
909 }
910 udelay(25);
911
912 /* Setup DMA */
913 local_irq_save(flags);
914 dma_wd.dma_lo = (unsigned char)paddr;
915 MFPDELAY();
916 paddr >>= 8;
917 dma_wd.dma_md = (unsigned char)paddr;
918 MFPDELAY();
919 paddr >>= 8;
920 if (ATARIHW_PRESENT(EXTD_DMA))
921 st_dma_ext_dmahi = (unsigned short)paddr;
922 else
923 dma_wd.dma_hi = (unsigned char)paddr;
924 MFPDELAY();
925 local_irq_restore(flags);
926
927 /* Clear FIFO and switch DMA to correct mode */
928 dma_wd.dma_mode_status = 0x90 | rwflag;
929 MFPDELAY();
930 dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100);
931 MFPDELAY();
932 dma_wd.dma_mode_status = 0x90 | rwflag;
933 MFPDELAY();
934
935 /* How many sectors for DMA */
936 dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1;
937
938 udelay(25);
939
940 /* Start operation */
941 dma_wd.dma_mode_status = FDCSELREG_STP | rwflag;
942 udelay(25);
943 SET_IRQ_HANDLER( fd_rwsec_done );
944 dma_wd.fdc_acces_seccount =
945 (get_head_settle_flag() |
946 (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0))));
947
948 old_motoron = MotorOn;
949 MotorOn = 1;
950 NeedSeek = 1;
951 /* wait for interrupt */
952
953 if (read_track) {
954 /* If reading a whole track, wait about one disk rotation and
955 * then check if all sectors are read. The FDC will even
956 * search for the first non-existent sector and need 1 sec to
957 * recognise that it isn't present :-(
958 */
959 MultReadInProgress = 1;
960 mod_timer(&readtrack_timer,
961 /* 1 rot. + 5 rot.s if motor was off */
962 jiffies + HZ/5 + (old_motoron ? 0 : HZ));
963 }
964 start_timeout();
965 }
966
967
968 static void fd_readtrack_check( unsigned long dummy )
969 {
970 unsigned long flags, addr, addr2;
971
972 local_irq_save(flags);
973
974 if (!MultReadInProgress) {
975 /* This prevents a race condition that could arise if the
976 * interrupt is triggered while the calling of this timer
977 * callback function takes place. The IRQ function then has
978 * already cleared 'MultReadInProgress' when flow of control
979 * gets here.
980 */
981 local_irq_restore(flags);
982 return;
983 }
984
985 /* get the current DMA address */
986 /* ++ f.a. read twice to avoid being fooled by switcher */
987 addr = 0;
988 do {
989 addr2 = addr;
990 addr = dma_wd.dma_lo & 0xff;
991 MFPDELAY();
992 addr |= (dma_wd.dma_md & 0xff) << 8;
993 MFPDELAY();
994 if (ATARIHW_PRESENT( EXTD_DMA ))
995 addr |= (st_dma_ext_dmahi & 0xffff) << 16;
996 else
997 addr |= (dma_wd.dma_hi & 0xff) << 16;
998 MFPDELAY();
999 } while(addr != addr2);
1000
1001 if (addr >= PhysTrackBuffer + SUDT->spt*512) {
1002 /* already read enough data, force an FDC interrupt to stop
1003 * the read operation
1004 */
1005 SET_IRQ_HANDLER( NULL );
1006 MultReadInProgress = 0;
1007 local_irq_restore(flags);
1008 DPRINT(("fd_readtrack_check(): done\n"));
1009 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
1010 udelay(25);
1011
1012 /* No error until now -- the FDC would have interrupted
1013 * otherwise!
1014 */
1015 fd_rwsec_done1(0);
1016 }
1017 else {
1018 /* not yet finished, wait another tenth rotation */
1019 local_irq_restore(flags);
1020 DPRINT(("fd_readtrack_check(): not yet finished\n"));
1021 mod_timer(&readtrack_timer, jiffies + HZ/5/10);
1022 }
1023 }
1024
1025
1026 static void fd_rwsec_done( int status )
1027 {
1028 DPRINT(("fd_rwsec_done()\n"));
1029
1030 if (read_track) {
1031 del_timer(&readtrack_timer);
1032 if (!MultReadInProgress)
1033 return;
1034 MultReadInProgress = 0;
1035 }
1036 fd_rwsec_done1(status);
1037 }
1038
1039 static void fd_rwsec_done1(int status)
1040 {
1041 unsigned int track;
1042
1043 stop_timeout();
1044
1045 /* Correct the track if stretch != 0 */
1046 if (SUDT->stretch) {
1047 track = FDC_READ( FDCREG_TRACK);
1048 MFPDELAY();
1049 FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch);
1050 }
1051
1052 if (!UseTrackbuffer) {
1053 dma_wd.dma_mode_status = 0x90;
1054 MFPDELAY();
1055 if (!(dma_wd.dma_mode_status & 0x01)) {
1056 printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive );
1057 goto err_end;
1058 }
1059 }
1060 MFPDELAY();
1061
1062 if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) {
1063 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive );
1064 goto err_end;
1065 }
1066 if ((status & FDCSTAT_RECNF) &&
1067 /* RECNF is no error after a multiple read when the FDC
1068 searched for a non-existent sector! */
1069 !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) {
1070 if (Probing) {
1071 if (SUDT > atari_disk_type) {
1072 if (SUDT[-1].blocks > ReqBlock) {
1073 /* try another disk type */
1074 SUDT--;
1075 set_capacity(unit[SelectedDrive].disk,
1076 SUDT->blocks);
1077 } else
1078 Probing = 0;
1079 }
1080 else {
1081 if (SUD.flags & FTD_MSG)
1082 printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n",
1083 SelectedDrive, SUDT->name );
1084 Probing=0;
1085 }
1086 } else {
1087 /* record not found, but not probing. Maybe stretch wrong ? Restart probing */
1088 if (SUD.autoprobe) {
1089 SUDT = atari_disk_type + StartDiskType[DriveType];
1090 set_capacity(unit[SelectedDrive].disk,
1091 SUDT->blocks);
1092 Probing = 1;
1093 }
1094 }
1095 if (Probing) {
1096 if (ATARIHW_PRESENT(FDCSPEED)) {
1097 dma_wd.fdc_speed = SUDT->fdc_speed;
1098 MFPDELAY();
1099 }
1100 setup_req_params( SelectedDrive );
1101 BufferDrive = -1;
1102 do_fd_action( SelectedDrive );
1103 return;
1104 }
1105
1106 printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n",
1107 SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack );
1108 goto err_end;
1109 }
1110 if (status & FDCSTAT_CRC) {
1111 printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n",
1112 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) );
1113 goto err_end;
1114 }
1115 if (status & FDCSTAT_LOST) {
1116 printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n",
1117 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) );
1118 goto err_end;
1119 }
1120
1121 Probing = 0;
1122
1123 if (ReqCmd == READ) {
1124 if (!read_track) {
1125 void *addr;
1126 addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer;
1127 dma_cache_maintenance( virt_to_phys(addr), 512, 0 );
1128 if (!ATARIHW_PRESENT( EXTD_DMA ))
1129 copy_buffer (addr, ReqData);
1130 } else {
1131 dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 );
1132 BufferDrive = SelectedDrive;
1133 BufferSide = ReqSide;
1134 BufferTrack = ReqTrack;
1135 copy_buffer (SECTOR_BUFFER (ReqSector), ReqData);
1136 }
1137 }
1138
1139 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) {
1140 /* read next sector */
1141 setup_req_params( SelectedDrive );
1142 do_fd_action( SelectedDrive );
1143 }
1144 else {
1145 /* all sectors finished */
1146 fd_end_request_cur(0);
1147 redo_fd_request();
1148 }
1149 return;
1150
1151 err_end:
1152 BufferDrive = -1;
1153 fd_error();
1154 }
1155
1156
1157 static void fd_writetrack( void )
1158 {
1159 unsigned long paddr, flags;
1160 unsigned int track;
1161
1162 DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide ));
1163
1164 paddr = PhysTrackBuffer;
1165 dma_cache_maintenance( paddr, BUFFER_SIZE, 1 );
1166
1167 fd_select_side( ReqSide );
1168
1169 /* Cheat for track if stretch != 0 */
1170 if (SUDT->stretch) {
1171 track = FDC_READ( FDCREG_TRACK);
1172 MFPDELAY();
1173 FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch);
1174 }
1175 udelay(40);
1176
1177 /* Setup DMA */
1178 local_irq_save(flags);
1179 dma_wd.dma_lo = (unsigned char)paddr;
1180 MFPDELAY();
1181 paddr >>= 8;
1182 dma_wd.dma_md = (unsigned char)paddr;
1183 MFPDELAY();
1184 paddr >>= 8;
1185 if (ATARIHW_PRESENT( EXTD_DMA ))
1186 st_dma_ext_dmahi = (unsigned short)paddr;
1187 else
1188 dma_wd.dma_hi = (unsigned char)paddr;
1189 MFPDELAY();
1190 local_irq_restore(flags);
1191
1192 /* Clear FIFO and switch DMA to correct mode */
1193 dma_wd.dma_mode_status = 0x190;
1194 MFPDELAY();
1195 dma_wd.dma_mode_status = 0x90;
1196 MFPDELAY();
1197 dma_wd.dma_mode_status = 0x190;
1198 MFPDELAY();
1199
1200 /* How many sectors for DMA */
1201 dma_wd.fdc_acces_seccount = BUFFER_SIZE/512;
1202 udelay(40);
1203
1204 /* Start operation */
1205 dma_wd.dma_mode_status = FDCSELREG_STP | 0x100;
1206 udelay(40);
1207 SET_IRQ_HANDLER( fd_writetrack_done );
1208 dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag();
1209
1210 MotorOn = 1;
1211 start_timeout();
1212 /* wait for interrupt */
1213 }
1214
1215
1216 static void fd_writetrack_done( int status )
1217 {
1218 DPRINT(("fd_writetrack_done()\n"));
1219
1220 stop_timeout();
1221
1222 if (status & FDCSTAT_WPROT) {
1223 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive );
1224 goto err_end;
1225 }
1226 if (status & FDCSTAT_LOST) {
1227 printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n",
1228 SelectedDrive, ReqSide, ReqTrack );
1229 goto err_end;
1230 }
1231
1232 wake_up( &format_wait );
1233 return;
1234
1235 err_end:
1236 fd_error();
1237 }
1238
1239 static void fd_times_out( unsigned long dummy )
1240 {
1241 atari_disable_irq( IRQ_MFP_FDC );
1242 if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but
1243 * before we came here... */
1244
1245 SET_IRQ_HANDLER( NULL );
1246 /* If the timeout occurred while the readtrack_check timer was
1247 * active, we need to cancel it, else bad things will happen */
1248 if (UseTrackbuffer)
1249 del_timer( &readtrack_timer );
1250 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
1251 udelay( 25 );
1252
1253 printk(KERN_ERR "floppy timeout\n" );
1254 fd_error();
1255 end:
1256 atari_enable_irq( IRQ_MFP_FDC );
1257 }
1258
1259
1260 /* The (noop) seek operation here is needed to make the WP bit in the
1261 * FDC status register accessible for check_change. If the last disk
1262 * operation would have been a RDSEC, this bit would always read as 0
1263 * no matter what :-( To save time, the seek goes to the track we're
1264 * already on.
1265 */
1266
1267 static void finish_fdc( void )
1268 {
1269 if (!NeedSeek) {
1270 finish_fdc_done( 0 );
1271 }
1272 else {
1273 DPRINT(("finish_fdc: dummy seek started\n"));
1274 FDC_WRITE (FDCREG_DATA, SUD.track);
1275 SET_IRQ_HANDLER( finish_fdc_done );
1276 FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK);
1277 MotorOn = 1;
1278 start_timeout();
1279 /* we must wait for the IRQ here, because the ST-DMA
1280 is released immediately afterwards and the interrupt
1281 may be delivered to the wrong driver. */
1282 }
1283 }
1284
1285
1286 static void finish_fdc_done( int dummy )
1287 {
1288 unsigned long flags;
1289
1290 DPRINT(("finish_fdc_done entered\n"));
1291 stop_timeout();
1292 NeedSeek = 0;
1293
1294 if (timer_pending(&fd_timer) && time_before(fd_timer.expires, jiffies + 5))
1295 /* If the check for a disk change is done too early after this
1296 * last seek command, the WP bit still reads wrong :-((
1297 */
1298 mod_timer(&fd_timer, jiffies + 5);
1299 else
1300 start_check_change_timer();
1301 start_motor_off_timer();
1302
1303 local_irq_save(flags);
1304 stdma_release();
1305 fdc_busy = 0;
1306 wake_up( &fdc_wait );
1307 local_irq_restore(flags);
1308
1309 DPRINT(("finish_fdc() finished\n"));
1310 }
1311
1312 /* The detection of disk changes is a dark chapter in Atari history :-(
1313 * Because the "Drive ready" signal isn't present in the Atari
1314 * hardware, one has to rely on the "Write Protect". This works fine,
1315 * as long as no write protected disks are used. TOS solves this
1316 * problem by introducing tri-state logic ("maybe changed") and
1317 * looking at the serial number in block 0. This isn't possible for
1318 * Linux, since the floppy driver can't make assumptions about the
1319 * filesystem used on the disk and thus the contents of block 0. I've
1320 * chosen the method to always say "The disk was changed" if it is
1321 * unsure whether it was. This implies that every open or mount
1322 * invalidates the disk buffers if you work with write protected
1323 * disks. But at least this is better than working with incorrect data
1324 * due to unrecognised disk changes.
1325 */
1326
1327 static unsigned int floppy_check_events(struct gendisk *disk,
1328 unsigned int clearing)
1329 {
1330 struct atari_floppy_struct *p = disk->private_data;
1331 unsigned int drive = p - unit;
1332 if (test_bit (drive, &fake_change)) {
1333 /* simulated change (e.g. after formatting) */
1334 return DISK_EVENT_MEDIA_CHANGE;
1335 }
1336 if (test_bit (drive, &changed_floppies)) {
1337 /* surely changed (the WP signal changed at least once) */
1338 return DISK_EVENT_MEDIA_CHANGE;
1339 }
1340 if (UD.wpstat) {
1341 /* WP is on -> could be changed: to be sure, buffers should be
1342 * invalidated...
1343 */
1344 return DISK_EVENT_MEDIA_CHANGE;
1345 }
1346
1347 return 0;
1348 }
1349
1350 static int floppy_revalidate(struct gendisk *disk)
1351 {
1352 struct atari_floppy_struct *p = disk->private_data;
1353 unsigned int drive = p - unit;
1354
1355 if (test_bit(drive, &changed_floppies) ||
1356 test_bit(drive, &fake_change) ||
1357 p->disktype == 0) {
1358 if (UD.flags & FTD_MSG)
1359 printk(KERN_ERR "floppy: clear format %p!\n", UDT);
1360 BufferDrive = -1;
1361 clear_bit(drive, &fake_change);
1362 clear_bit(drive, &changed_floppies);
1363 /* MSch: clearing geometry makes sense only for autoprobe
1364 formats, for 'permanent user-defined' parameter:
1365 restore default_params[] here if flagged valid! */
1366 if (default_params[drive].blocks == 0)
1367 UDT = NULL;
1368 else
1369 UDT = &default_params[drive];
1370 }
1371 return 0;
1372 }
1373
1374
1375 /* This sets up the global variables describing the current request. */
1376
1377 static void setup_req_params( int drive )
1378 {
1379 int block = ReqBlock + ReqCnt;
1380
1381 ReqTrack = block / UDT->spt;
1382 ReqSector = block - ReqTrack * UDT->spt + 1;
1383 ReqSide = ReqTrack & 1;
1384 ReqTrack >>= 1;
1385 ReqData = ReqBuffer + 512 * ReqCnt;
1386
1387 if (UseTrackbuffer)
1388 read_track = (ReqCmd == READ && fd_request->errors == 0);
1389 else
1390 read_track = 0;
1391
1392 DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide,
1393 ReqTrack, ReqSector, (unsigned long)ReqData ));
1394 }
1395
1396 /*
1397 * Round-robin between our available drives, doing one request from each
1398 */
1399 static struct request *set_next_request(void)
1400 {
1401 struct request_queue *q;
1402 int old_pos = fdc_queue;
1403 struct request *rq = NULL;
1404
1405 do {
1406 q = unit[fdc_queue].disk->queue;
1407 if (++fdc_queue == FD_MAX_UNITS)
1408 fdc_queue = 0;
1409 if (q) {
1410 rq = blk_fetch_request(q);
1411 if (rq)
1412 break;
1413 }
1414 } while (fdc_queue != old_pos);
1415
1416 return rq;
1417 }
1418
1419
1420 static void redo_fd_request(void)
1421 {
1422 int drive, type;
1423 struct atari_floppy_struct *floppy;
1424
1425 DPRINT(("redo_fd_request: fd_request=%p dev=%s fd_request->sector=%ld\n",
1426 fd_request, fd_request ? fd_request->rq_disk->disk_name : "",
1427 fd_request ? blk_rq_pos(fd_request) : 0 ));
1428
1429 IsFormatting = 0;
1430
1431 repeat:
1432 if (!fd_request) {
1433 fd_request = set_next_request();
1434 if (!fd_request)
1435 goto the_end;
1436 }
1437
1438 floppy = fd_request->rq_disk->private_data;
1439 drive = floppy - unit;
1440 type = floppy->type;
1441
1442 if (!UD.connected) {
1443 /* drive not connected */
1444 printk(KERN_ERR "Unknown Device: fd%d\n", drive );
1445 fd_end_request_cur(-EIO);
1446 goto repeat;
1447 }
1448
1449 if (type == 0) {
1450 if (!UDT) {
1451 Probing = 1;
1452 UDT = atari_disk_type + StartDiskType[DriveType];
1453 set_capacity(floppy->disk, UDT->blocks);
1454 UD.autoprobe = 1;
1455 }
1456 }
1457 else {
1458 /* user supplied disk type */
1459 if (--type >= NUM_DISK_MINORS) {
1460 printk(KERN_WARNING "fd%d: invalid disk format", drive );
1461 fd_end_request_cur(-EIO);
1462 goto repeat;
1463 }
1464 if (minor2disktype[type].drive_types > DriveType) {
1465 printk(KERN_WARNING "fd%d: unsupported disk format", drive );
1466 fd_end_request_cur(-EIO);
1467 goto repeat;
1468 }
1469 type = minor2disktype[type].index;
1470 UDT = &atari_disk_type[type];
1471 set_capacity(floppy->disk, UDT->blocks);
1472 UD.autoprobe = 0;
1473 }
1474
1475 if (blk_rq_pos(fd_request) + 1 > UDT->blocks) {
1476 fd_end_request_cur(-EIO);
1477 goto repeat;
1478 }
1479
1480 /* stop deselect timer */
1481 del_timer( &motor_off_timer );
1482
1483 ReqCnt = 0;
1484 ReqCmd = rq_data_dir(fd_request);
1485 ReqBlock = blk_rq_pos(fd_request);
1486 ReqBuffer = fd_request->buffer;
1487 setup_req_params( drive );
1488 do_fd_action( drive );
1489
1490 return;
1491
1492 the_end:
1493 finish_fdc();
1494 }
1495
1496
1497 void do_fd_request(struct request_queue * q)
1498 {
1499 DPRINT(("do_fd_request for pid %d\n",current->pid));
1500 while( fdc_busy ) sleep_on( &fdc_wait );
1501 fdc_busy = 1;
1502 stdma_lock(floppy_irq, NULL);
1503
1504 atari_disable_irq( IRQ_MFP_FDC );
1505 redo_fd_request();
1506 atari_enable_irq( IRQ_MFP_FDC );
1507 }
1508
1509 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1510 unsigned int cmd, unsigned long param)
1511 {
1512 struct gendisk *disk = bdev->bd_disk;
1513 struct atari_floppy_struct *floppy = disk->private_data;
1514 int drive = floppy - unit;
1515 int type = floppy->type;
1516 struct atari_format_descr fmt_desc;
1517 struct atari_disk_type *dtp;
1518 struct floppy_struct getprm;
1519 int settype;
1520 struct floppy_struct setprm;
1521 void __user *argp = (void __user *)param;
1522
1523 switch (cmd) {
1524 case FDGETPRM:
1525 if (type) {
1526 if (--type >= NUM_DISK_MINORS)
1527 return -ENODEV;
1528 if (minor2disktype[type].drive_types > DriveType)
1529 return -ENODEV;
1530 type = minor2disktype[type].index;
1531 dtp = &atari_disk_type[type];
1532 if (UD.flags & FTD_MSG)
1533 printk (KERN_ERR "floppy%d: found dtp %p name %s!\n",
1534 drive, dtp, dtp->name);
1535 }
1536 else {
1537 if (!UDT)
1538 return -ENXIO;
1539 else
1540 dtp = UDT;
1541 }
1542 memset((void *)&getprm, 0, sizeof(getprm));
1543 getprm.size = dtp->blocks;
1544 getprm.sect = dtp->spt;
1545 getprm.head = 2;
1546 getprm.track = dtp->blocks/dtp->spt/2;
1547 getprm.stretch = dtp->stretch;
1548 if (copy_to_user(argp, &getprm, sizeof(getprm)))
1549 return -EFAULT;
1550 return 0;
1551 }
1552 switch (cmd) {
1553 case FDSETPRM:
1554 case FDDEFPRM:
1555 /*
1556 * MSch 7/96: simple 'set geometry' case: just set the
1557 * 'default' device params (minor == 0).
1558 * Currently, the drive geometry is cleared after each
1559 * disk change and subsequent revalidate()! simple
1560 * implementation of FDDEFPRM: save geometry from a
1561 * FDDEFPRM call and restore it in floppy_revalidate() !
1562 */
1563
1564 /* get the parameters from user space */
1565 if (floppy->ref != 1 && floppy->ref != -1)
1566 return -EBUSY;
1567 if (copy_from_user(&setprm, argp, sizeof(setprm)))
1568 return -EFAULT;
1569 /*
1570 * first of all: check for floppy change and revalidate,
1571 * or the next access will revalidate - and clear UDT :-(
1572 */
1573
1574 if (floppy_check_events(disk, 0))
1575 floppy_revalidate(disk);
1576
1577 if (UD.flags & FTD_MSG)
1578 printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n",
1579 drive, setprm.size, setprm.sect, setprm.stretch);
1580
1581 /* what if type > 0 here? Overwrite specified entry ? */
1582 if (type) {
1583 /* refuse to re-set a predefined type for now */
1584 redo_fd_request();
1585 return -EINVAL;
1586 }
1587
1588 /*
1589 * type == 0: first look for a matching entry in the type list,
1590 * and set the UD.disktype field to use the perdefined entry.
1591 * TODO: add user-defined format to head of autoprobe list ?
1592 * Useful to include the user-type for future autodetection!
1593 */
1594
1595 for (settype = 0; settype < NUM_DISK_MINORS; settype++) {
1596 int setidx = 0;
1597 if (minor2disktype[settype].drive_types > DriveType) {
1598 /* skip this one, invalid for drive ... */
1599 continue;
1600 }
1601 setidx = minor2disktype[settype].index;
1602 dtp = &atari_disk_type[setidx];
1603
1604 /* found matching entry ?? */
1605 if ( dtp->blocks == setprm.size
1606 && dtp->spt == setprm.sect
1607 && dtp->stretch == setprm.stretch ) {
1608 if (UD.flags & FTD_MSG)
1609 printk (KERN_INFO "floppy%d: setting %s %p!\n",
1610 drive, dtp->name, dtp);
1611 UDT = dtp;
1612 set_capacity(floppy->disk, UDT->blocks);
1613
1614 if (cmd == FDDEFPRM) {
1615 /* save settings as permanent default type */
1616 default_params[drive].name = dtp->name;
1617 default_params[drive].spt = dtp->spt;
1618 default_params[drive].blocks = dtp->blocks;
1619 default_params[drive].fdc_speed = dtp->fdc_speed;
1620 default_params[drive].stretch = dtp->stretch;
1621 }
1622
1623 return 0;
1624 }
1625
1626 }
1627
1628 /* no matching disk type found above - setting user_params */
1629
1630 if (cmd == FDDEFPRM) {
1631 /* set permanent type */
1632 dtp = &default_params[drive];
1633 } else
1634 /* set user type (reset by disk change!) */
1635 dtp = &user_params[drive];
1636
1637 dtp->name = "user format";
1638 dtp->blocks = setprm.size;
1639 dtp->spt = setprm.sect;
1640 if (setprm.sect > 14)
1641 dtp->fdc_speed = 3;
1642 else
1643 dtp->fdc_speed = 0;
1644 dtp->stretch = setprm.stretch;
1645
1646 if (UD.flags & FTD_MSG)
1647 printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n",
1648 drive, dtp->blocks, dtp->spt, dtp->stretch);
1649
1650 /* sanity check */
1651 if (setprm.track != dtp->blocks/dtp->spt/2 ||
1652 setprm.head != 2) {
1653 redo_fd_request();
1654 return -EINVAL;
1655 }
1656
1657 UDT = dtp;
1658 set_capacity(floppy->disk, UDT->blocks);
1659
1660 return 0;
1661 case FDMSGON:
1662 UD.flags |= FTD_MSG;
1663 return 0;
1664 case FDMSGOFF:
1665 UD.flags &= ~FTD_MSG;
1666 return 0;
1667 case FDSETEMSGTRESH:
1668 return -EINVAL;
1669 case FDFMTBEG:
1670 return 0;
1671 case FDFMTTRK:
1672 if (floppy->ref != 1 && floppy->ref != -1)
1673 return -EBUSY;
1674 if (copy_from_user(&fmt_desc, argp, sizeof(fmt_desc)))
1675 return -EFAULT;
1676 return do_format(drive, type, &fmt_desc);
1677 case FDCLRPRM:
1678 UDT = NULL;
1679 /* MSch: invalidate default_params */
1680 default_params[drive].blocks = 0;
1681 set_capacity(floppy->disk, MAX_DISK_SIZE * 2);
1682 case FDFMTEND:
1683 case FDFLUSH:
1684 /* invalidate the buffer track to force a reread */
1685 BufferDrive = -1;
1686 set_bit(drive, &fake_change);
1687 check_disk_change(bdev);
1688 return 0;
1689 default:
1690 return -EINVAL;
1691 }
1692 }
1693
1694 static int fd_ioctl(struct block_device *bdev, fmode_t mode,
1695 unsigned int cmd, unsigned long arg)
1696 {
1697 int ret;
1698
1699 mutex_lock(&ataflop_mutex);
1700 ret = fd_locked_ioctl(bdev, mode, cmd, arg);
1701 mutex_unlock(&ataflop_mutex);
1702
1703 return ret;
1704 }
1705
1706 /* Initialize the 'unit' variable for drive 'drive' */
1707
1708 static void __init fd_probe( int drive )
1709 {
1710 UD.connected = 0;
1711 UDT = NULL;
1712
1713 if (!fd_test_drive_present( drive ))
1714 return;
1715
1716 UD.connected = 1;
1717 UD.track = 0;
1718 switch( UserSteprate[drive] ) {
1719 case 2:
1720 UD.steprate = FDCSTEP_2;
1721 break;
1722 case 3:
1723 UD.steprate = FDCSTEP_3;
1724 break;
1725 case 6:
1726 UD.steprate = FDCSTEP_6;
1727 break;
1728 case 12:
1729 UD.steprate = FDCSTEP_12;
1730 break;
1731 default: /* should be -1 for "not set by user" */
1732 if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA)
1733 UD.steprate = FDCSTEP_3;
1734 else
1735 UD.steprate = FDCSTEP_6;
1736 break;
1737 }
1738 MotorOn = 1; /* from probe restore operation! */
1739 }
1740
1741
1742 /* This function tests the physical presence of a floppy drive (not
1743 * whether a disk is inserted). This is done by issuing a restore
1744 * command, waiting max. 2 seconds (that should be enough to move the
1745 * head across the whole disk) and looking at the state of the "TR00"
1746 * signal. This should now be raised if there is a drive connected
1747 * (and there is no hardware failure :-) Otherwise, the drive is
1748 * declared absent.
1749 */
1750
1751 static int __init fd_test_drive_present( int drive )
1752 {
1753 unsigned long timeout;
1754 unsigned char status;
1755 int ok;
1756
1757 if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 );
1758 fd_select_drive( drive );
1759
1760 /* disable interrupt temporarily */
1761 atari_turnoff_irq( IRQ_MFP_FDC );
1762 FDC_WRITE (FDCREG_TRACK, 0xff00);
1763 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 );
1764
1765 timeout = jiffies + 2*HZ+HZ/2;
1766 while (time_before(jiffies, timeout))
1767 if (!(st_mfp.par_dt_reg & 0x20))
1768 break;
1769
1770 status = FDC_READ( FDCREG_STATUS );
1771 ok = (status & FDCSTAT_TR00) != 0;
1772
1773 /* force interrupt to abort restore operation (FDC would try
1774 * about 50 seconds!) */
1775 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
1776 udelay(500);
1777 status = FDC_READ( FDCREG_STATUS );
1778 udelay(20);
1779
1780 if (ok) {
1781 /* dummy seek command to make WP bit accessible */
1782 FDC_WRITE( FDCREG_DATA, 0 );
1783 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK );
1784 while( st_mfp.par_dt_reg & 0x20 )
1785 ;
1786 status = FDC_READ( FDCREG_STATUS );
1787 }
1788
1789 atari_turnon_irq( IRQ_MFP_FDC );
1790 return( ok );
1791 }
1792
1793
1794 /* Look how many and which kind of drives are connected. If there are
1795 * floppies, additionally start the disk-change and motor-off timers.
1796 */
1797
1798 static void __init config_types( void )
1799 {
1800 int drive, cnt = 0;
1801
1802 /* for probing drives, set the FDC speed to 8 MHz */
1803 if (ATARIHW_PRESENT(FDCSPEED))
1804 dma_wd.fdc_speed = 0;
1805
1806 printk(KERN_INFO "Probing floppy drive(s):\n");
1807 for( drive = 0; drive < FD_MAX_UNITS; drive++ ) {
1808 fd_probe( drive );
1809 if (UD.connected) {
1810 printk(KERN_INFO "fd%d\n", drive);
1811 ++cnt;
1812 }
1813 }
1814
1815 if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) {
1816 /* If FDC is still busy from probing, give it another FORCI
1817 * command to abort the operation. If this isn't done, the FDC
1818 * will interrupt later and its IRQ line stays low, because
1819 * the status register isn't read. And this will block any
1820 * interrupts on this IRQ line :-(
1821 */
1822 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
1823 udelay(500);
1824 FDC_READ( FDCREG_STATUS );
1825 udelay(20);
1826 }
1827
1828 if (cnt > 0) {
1829 start_motor_off_timer();
1830 if (cnt == 1) fd_select_drive( 0 );
1831 start_check_change_timer();
1832 }
1833 }
1834
1835 /*
1836 * floppy_open check for aliasing (/dev/fd0 can be the same as
1837 * /dev/PS0 etc), and disallows simultaneous access to the same
1838 * drive with different device numbers.
1839 */
1840
1841 static int floppy_open(struct block_device *bdev, fmode_t mode)
1842 {
1843 struct atari_floppy_struct *p = bdev->bd_disk->private_data;
1844 int type = MINOR(bdev->bd_dev) >> 2;
1845
1846 DPRINT(("fd_open: type=%d\n",type));
1847 if (p->ref && p->type != type)
1848 return -EBUSY;
1849
1850 if (p->ref == -1 || (p->ref && mode & FMODE_EXCL))
1851 return -EBUSY;
1852
1853 if (mode & FMODE_EXCL)
1854 p->ref = -1;
1855 else
1856 p->ref++;
1857
1858 p->type = type;
1859
1860 if (mode & FMODE_NDELAY)
1861 return 0;
1862
1863 if (mode & (FMODE_READ|FMODE_WRITE)) {
1864 check_disk_change(bdev);
1865 if (mode & FMODE_WRITE) {
1866 if (p->wpstat) {
1867 if (p->ref < 0)
1868 p->ref = 0;
1869 else
1870 p->ref--;
1871 return -EROFS;
1872 }
1873 }
1874 }
1875 return 0;
1876 }
1877
1878 static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
1879 {
1880 int ret;
1881
1882 mutex_lock(&ataflop_mutex);
1883 ret = floppy_open(bdev, mode);
1884 mutex_unlock(&ataflop_mutex);
1885
1886 return ret;
1887 }
1888
1889 static int floppy_release(struct gendisk *disk, fmode_t mode)
1890 {
1891 struct atari_floppy_struct *p = disk->private_data;
1892 mutex_lock(&ataflop_mutex);
1893 if (p->ref < 0)
1894 p->ref = 0;
1895 else if (!p->ref--) {
1896 printk(KERN_ERR "floppy_release with fd_ref == 0");
1897 p->ref = 0;
1898 }
1899 mutex_unlock(&ataflop_mutex);
1900 return 0;
1901 }
1902
1903 static const struct block_device_operations floppy_fops = {
1904 .owner = THIS_MODULE,
1905 .open = floppy_unlocked_open,
1906 .release = floppy_release,
1907 .ioctl = fd_ioctl,
1908 .check_events = floppy_check_events,
1909 .revalidate_disk= floppy_revalidate,
1910 };
1911
1912 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
1913 {
1914 int drive = *part & 3;
1915 int type = *part >> 2;
1916 if (drive >= FD_MAX_UNITS || type > NUM_DISK_MINORS)
1917 return NULL;
1918 *part = 0;
1919 return get_disk(unit[drive].disk);
1920 }
1921
1922 static int __init atari_floppy_init (void)
1923 {
1924 int i;
1925
1926 if (!MACH_IS_ATARI)
1927 /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */
1928 return -ENODEV;
1929
1930 if (register_blkdev(FLOPPY_MAJOR,"fd"))
1931 return -EBUSY;
1932
1933 for (i = 0; i < FD_MAX_UNITS; i++) {
1934 unit[i].disk = alloc_disk(1);
1935 if (!unit[i].disk)
1936 goto Enomem;
1937 }
1938
1939 if (UseTrackbuffer < 0)
1940 /* not set by user -> use default: for now, we turn
1941 track buffering off for all Medusas, though it
1942 could be used with ones that have a counter
1943 card. But the test is too hard :-( */
1944 UseTrackbuffer = !MACH_IS_MEDUSA;
1945
1946 /* initialize variables */
1947 SelectedDrive = -1;
1948 BufferDrive = -1;
1949
1950 DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop");
1951 if (!DMABuffer) {
1952 printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n");
1953 goto Enomem;
1954 }
1955 TrackBuffer = DMABuffer + 512;
1956 PhysDMABuffer = virt_to_phys(DMABuffer);
1957 PhysTrackBuffer = virt_to_phys(TrackBuffer);
1958 BufferDrive = BufferSide = BufferTrack = -1;
1959
1960 for (i = 0; i < FD_MAX_UNITS; i++) {
1961 unit[i].track = -1;
1962 unit[i].flags = 0;
1963 unit[i].disk->major = FLOPPY_MAJOR;
1964 unit[i].disk->first_minor = i;
1965 sprintf(unit[i].disk->disk_name, "fd%d", i);
1966 unit[i].disk->fops = &floppy_fops;
1967 unit[i].disk->private_data = &unit[i];
1968 unit[i].disk->queue = blk_init_queue(do_fd_request,
1969 &ataflop_lock);
1970 if (!unit[i].disk->queue)
1971 goto Enomem;
1972 set_capacity(unit[i].disk, MAX_DISK_SIZE * 2);
1973 add_disk(unit[i].disk);
1974 }
1975
1976 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
1977 floppy_find, NULL, NULL);
1978
1979 printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n",
1980 DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E',
1981 UseTrackbuffer ? "" : "no ");
1982 config_types();
1983
1984 return 0;
1985 Enomem:
1986 while (i--) {
1987 struct request_queue *q = unit[i].disk->queue;
1988
1989 put_disk(unit[i].disk);
1990 if (q)
1991 blk_cleanup_queue(q);
1992 }
1993
1994 unregister_blkdev(FLOPPY_MAJOR, "fd");
1995 return -ENOMEM;
1996 }
1997
1998 #ifndef MODULE
1999 static int __init atari_floppy_setup(char *str)
2000 {
2001 int ints[3 + FD_MAX_UNITS];
2002 int i;
2003
2004 if (!MACH_IS_ATARI)
2005 return 0;
2006
2007 str = get_options(str, 3 + FD_MAX_UNITS, ints);
2008
2009 if (ints[0] < 1) {
2010 printk(KERN_ERR "ataflop_setup: no arguments!\n" );
2011 return 0;
2012 }
2013 else if (ints[0] > 2+FD_MAX_UNITS) {
2014 printk(KERN_ERR "ataflop_setup: too many arguments\n" );
2015 }
2016
2017 if (ints[1] < 0 || ints[1] > 2)
2018 printk(KERN_ERR "ataflop_setup: bad drive type\n" );
2019 else
2020 DriveType = ints[1];
2021
2022 if (ints[0] >= 2)
2023 UseTrackbuffer = (ints[2] > 0);
2024
2025 for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) {
2026 if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12)
2027 printk(KERN_ERR "ataflop_setup: bad steprate\n" );
2028 else
2029 UserSteprate[i-3] = ints[i];
2030 }
2031 return 1;
2032 }
2033
2034 __setup("floppy=", atari_floppy_setup);
2035 #endif
2036
2037 static void __exit atari_floppy_exit(void)
2038 {
2039 int i;
2040 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
2041 for (i = 0; i < FD_MAX_UNITS; i++) {
2042 struct request_queue *q = unit[i].disk->queue;
2043
2044 del_gendisk(unit[i].disk);
2045 put_disk(unit[i].disk);
2046 blk_cleanup_queue(q);
2047 }
2048 unregister_blkdev(FLOPPY_MAJOR, "fd");
2049
2050 del_timer_sync(&fd_timer);
2051 atari_stram_free( DMABuffer );
2052 }
2053
2054 module_init(atari_floppy_init)
2055 module_exit(atari_floppy_exit)
2056
2057 MODULE_LICENSE("GPL");
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