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staging: rtl8188eu: rename HalSetBrateCfg() - style
[linux/fpc-iii.git] / drivers / block / ataflop.c
blobdfb2c2622e5a64d77e85ca9d14059c25f1840878
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 #include <linux/completion.h>
72 #include <linux/wait.h>
73
74 #include <asm/atafd.h>
75 #include <asm/atafdreg.h>
76 #include <asm/atariints.h>
77 #include <asm/atari_stdma.h>
78 #include <asm/atari_stram.h>
79
80 #define FD_MAX_UNITS 2
81
82 #undef DEBUG
83
84 static DEFINE_MUTEX(ataflop_mutex);
85 static struct request *fd_request;
86 static int fdc_queue;
87
88 /* Disk types: DD, HD, ED */
89 static struct atari_disk_type {
90 const char *name;
91 unsigned spt; /* sectors per track */
92 unsigned blocks; /* total number of blocks */
93 unsigned fdc_speed; /* fdc_speed setting */
94 unsigned stretch; /* track doubling ? */
95 } atari_disk_type[] = {
96 { "d360", 9, 720, 0, 0}, /* 0: 360kB diskette */
97 { "D360", 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */
98 { "D720", 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */
99 { "D820", 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */
100 /* formats above are probed for type DD */
101 #define MAX_TYPE_DD 3
102 { "h1200",15,2400, 3, 0}, /* 4: 1.2MB diskette */
103 { "H1440",18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */
104 { "H1640",20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */
105 /* formats above are probed for types DD and HD */
106 #define MAX_TYPE_HD 6
107 { "E2880",36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */
108 { "E3280",40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */
109 /* formats above are probed for types DD, HD and ED */
110 #define MAX_TYPE_ED 8
111 /* types below are never autoprobed */
112 { "H1680",21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */
113 { "h410",10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */
114 { "h1476",18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */
115 { "H1722",21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */
116 { "h420",10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */
117 { "H830",10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */
118 { "h1494",18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */
119 { "H1743",21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */
120 { "h880",11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */
121 { "D1040",13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */
122 { "D1120",14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */
123 { "h1600",20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */
124 { "H1760",22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */
125 { "H1920",24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */
126 { "E3200",40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */
127 { "E3520",44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */
128 { "E3840",48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */
129 { "H1840",23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */
130 { "D800",10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */
131 };
132
133 static int StartDiskType[] = {
134 MAX_TYPE_DD,
135 MAX_TYPE_HD,
136 MAX_TYPE_ED
137 };
138
139 #define TYPE_DD 0
140 #define TYPE_HD 1
141 #define TYPE_ED 2
142
143 static int DriveType = TYPE_HD;
144
145 static DEFINE_SPINLOCK(ataflop_lock);
146
147 /* Array for translating minors into disk formats */
148 static struct {
149 int index;
150 unsigned drive_types;
151 } minor2disktype[] = {
152 { 0, TYPE_DD }, /* 1: d360 */
153 { 4, TYPE_HD }, /* 2: h1200 */
154 { 1, TYPE_DD }, /* 3: D360 */
155 { 2, TYPE_DD }, /* 4: D720 */
156 { 1, TYPE_DD }, /* 5: h360 = D360 */
157 { 2, TYPE_DD }, /* 6: h720 = D720 */
158 { 5, TYPE_HD }, /* 7: H1440 */
159 { 7, TYPE_ED }, /* 8: E2880 */
160 /* some PC formats :-) */
161 { 8, TYPE_ED }, /* 9: E3280 <- was "CompaQ" == E2880 for PC */
162 { 5, TYPE_HD }, /* 10: h1440 = H1440 */
163 { 9, TYPE_HD }, /* 11: H1680 */
164 { 10, TYPE_DD }, /* 12: h410 */
165 { 3, TYPE_DD }, /* 13: H820 <- == D820, 82x10 */
166 { 11, TYPE_HD }, /* 14: h1476 */
167 { 12, TYPE_HD }, /* 15: H1722 */
168 { 13, TYPE_DD }, /* 16: h420 */
169 { 14, TYPE_DD }, /* 17: H830 */
170 { 15, TYPE_HD }, /* 18: h1494 */
171 { 16, TYPE_HD }, /* 19: H1743 */
172 { 17, TYPE_DD }, /* 20: h880 */
173 { 18, TYPE_DD }, /* 21: D1040 */
174 { 19, TYPE_DD }, /* 22: D1120 */
175 { 20, TYPE_HD }, /* 23: h1600 */
176 { 21, TYPE_HD }, /* 24: H1760 */
177 { 22, TYPE_HD }, /* 25: H1920 */
178 { 23, TYPE_ED }, /* 26: E3200 */
179 { 24, TYPE_ED }, /* 27: E3520 */
180 { 25, TYPE_ED }, /* 28: E3840 */
181 { 26, TYPE_HD }, /* 29: H1840 */
182 { 27, TYPE_DD }, /* 30: D800 */
183 { 6, TYPE_HD }, /* 31: H1640 <- was H1600 == h1600 for PC */
184 };
185
186 #define NUM_DISK_MINORS ARRAY_SIZE(minor2disktype)
187
188 /*
189 * Maximum disk size (in kilobytes). This default is used whenever the
190 * current disk size is unknown.
191 */
192 #define MAX_DISK_SIZE 3280
193
194 /*
195 * MSch: User-provided type information. 'drive' points to
196 * the respective entry of this array. Set by FDSETPRM ioctls.
197 */
198 static struct atari_disk_type user_params[FD_MAX_UNITS];
199
200 /*
201 * User-provided permanent type information. 'drive' points to
202 * the respective entry of this array. Set by FDDEFPRM ioctls,
203 * restored upon disk change by floppy_revalidate() if valid (as seen by
204 * default_params[].blocks > 0 - a bit in unit[].flags might be used for this?)
205 */
206 static struct atari_disk_type default_params[FD_MAX_UNITS];
207
208 /* current info on each unit */
209 static struct atari_floppy_struct {
210 int connected; /* !=0 : drive is connected */
211 int autoprobe; /* !=0 : do autoprobe */
212
213 struct atari_disk_type *disktype; /* current type of disk */
214
215 int track; /* current head position or -1 if
216 unknown */
217 unsigned int steprate; /* steprate setting */
218 unsigned int wpstat; /* current state of WP signal (for
219 disk change detection) */
220 int flags; /* flags */
221 struct gendisk *disk;
222 int ref;
223 int type;
224 } unit[FD_MAX_UNITS];
225
226 #define UD unit[drive]
227 #define UDT unit[drive].disktype
228 #define SUD unit[SelectedDrive]
229 #define SUDT unit[SelectedDrive].disktype
230
231
232 #define FDC_READ(reg) ({ \
233 /* unsigned long __flags; */ \
234 unsigned short __val; \
235 /* local_irq_save(__flags); */ \
236 dma_wd.dma_mode_status = 0x80 | (reg); \
237 udelay(25); \
238 __val = dma_wd.fdc_acces_seccount; \
239 MFPDELAY(); \
240 /* local_irq_restore(__flags); */ \
241 __val & 0xff; \
242 })
243
244 #define FDC_WRITE(reg,val) \
245 do { \
246 /* unsigned long __flags; */ \
247 /* local_irq_save(__flags); */ \
248 dma_wd.dma_mode_status = 0x80 | (reg); \
249 udelay(25); \
250 dma_wd.fdc_acces_seccount = (val); \
251 MFPDELAY(); \
252 /* local_irq_restore(__flags); */ \
253 } while(0)
254
255
256 /* Buffering variables:
257 * First, there is a DMA buffer in ST-RAM that is used for floppy DMA
258 * operations. Second, a track buffer is used to cache a whole track
259 * of the disk to save read operations. These are two separate buffers
260 * because that allows write operations without clearing the track buffer.
261 */
262
263 static int MaxSectors[] = {
264 11, 22, 44
265 };
266 static int BufferSize[] = {
267 15*512, 30*512, 60*512
268 };
269
270 #define BUFFER_SIZE (BufferSize[DriveType])
271
272 unsigned char *DMABuffer; /* buffer for writes */
273 static unsigned long PhysDMABuffer; /* physical address */
274
275 static int UseTrackbuffer = -1; /* Do track buffering? */
276 module_param(UseTrackbuffer, int, 0);
277
278 unsigned char *TrackBuffer; /* buffer for reads */
279 static unsigned long PhysTrackBuffer; /* physical address */
280 static int BufferDrive, BufferSide, BufferTrack;
281 static int read_track; /* non-zero if we are reading whole tracks */
282
283 #define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512)
284 #define IS_BUFFERED(drive,side,track) \
285 (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track))
286
287 /*
288 * These are global variables, as that's the easiest way to give
289 * information to interrupts. They are the data used for the current
290 * request.
291 */
292 static int SelectedDrive = 0;
293 static int ReqCmd, ReqBlock;
294 static int ReqSide, ReqTrack, ReqSector, ReqCnt;
295 static int HeadSettleFlag = 0;
296 static unsigned char *ReqData, *ReqBuffer;
297 static int MotorOn = 0, MotorOffTrys;
298 static int IsFormatting = 0, FormatError;
299
300 static int UserSteprate[FD_MAX_UNITS] = { -1, -1 };
301 module_param_array(UserSteprate, int, NULL, 0);
302
303 /* Synchronization of FDC access. */
304 static volatile int fdc_busy = 0;
305 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
306 static DECLARE_COMPLETION(format_wait);
307
308 static unsigned long changed_floppies = 0xff, fake_change = 0;
309 #define CHECK_CHANGE_DELAY HZ/2
310
311 #define FD_MOTOR_OFF_DELAY (3*HZ)
312 #define FD_MOTOR_OFF_MAXTRY (10*20)
313
314 #define FLOPPY_TIMEOUT (6*HZ)
315 #define RECALIBRATE_ERRORS 4 /* After this many errors the drive
316 * will be recalibrated. */
317 #define MAX_ERRORS 8 /* After this many errors the driver
318 * will give up. */
319
320
321 /*
322 * The driver is trying to determine the correct media format
323 * while Probing is set. fd_rwsec_done() clears it after a
324 * successful access.
325 */
326 static int Probing = 0;
327
328 /* This flag is set when a dummy seek is necessary to make the WP
329 * status bit accessible.
330 */
331 static int NeedSeek = 0;
332
333
334 #ifdef DEBUG
335 #define DPRINT(a) printk a
336 #else
337 #define DPRINT(a)
338 #endif
339
340 /***************************** Prototypes *****************************/
341
342 static void fd_select_side( int side );
343 static void fd_select_drive( int drive );
344 static void fd_deselect( void );
345 static void fd_motor_off_timer(struct timer_list *unused);
346 static void check_change(struct timer_list *unused);
347 static irqreturn_t floppy_irq (int irq, void *dummy);
348 static void fd_error( void );
349 static int do_format(int drive, int type, struct atari_format_descr *desc);
350 static void do_fd_action( int drive );
351 static void fd_calibrate( void );
352 static void fd_calibrate_done( int status );
353 static void fd_seek( void );
354 static void fd_seek_done( int status );
355 static void fd_rwsec( void );
356 static void fd_readtrack_check(struct timer_list *unused);
357 static void fd_rwsec_done( int status );
358 static void fd_rwsec_done1(int status);
359 static void fd_writetrack( void );
360 static void fd_writetrack_done( int status );
361 static void fd_times_out(struct timer_list *unused);
362 static void finish_fdc( void );
363 static void finish_fdc_done( int dummy );
364 static void setup_req_params( int drive );
365 static void redo_fd_request( void);
366 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
367 cmd, unsigned long param);
368 static void fd_probe( int drive );
369 static int fd_test_drive_present( int drive );
370 static void config_types( void );
371 static int floppy_open(struct block_device *bdev, fmode_t mode);
372 static void floppy_release(struct gendisk *disk, fmode_t mode);
373
374 /************************* End of Prototypes **************************/
375
376 static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer);
377 static DEFINE_TIMER(readtrack_timer, fd_readtrack_check);
378 static DEFINE_TIMER(timeout_timer, fd_times_out);
379 static DEFINE_TIMER(fd_timer, check_change);
380
381 static void fd_end_request_cur(blk_status_t err)
382 {
383 if (!__blk_end_request_cur(fd_request, err))
384 fd_request = NULL;
385 }
386
387 static inline void start_motor_off_timer(void)
388 {
389 mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY);
390 MotorOffTrys = 0;
391 }
392
393 static inline void start_check_change_timer( void )
394 {
395 mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY);
396 }
397
398 static inline void start_timeout(void)
399 {
400 mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT);
401 }
402
403 static inline void stop_timeout(void)
404 {
405 del_timer(&timeout_timer);
406 }
407
408 /* Select the side to use. */
409
410 static void fd_select_side( int side )
411 {
412 unsigned long flags;
413
414 /* protect against various other ints mucking around with the PSG */
415 local_irq_save(flags);
416
417 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */
418 sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 :
419 sound_ym.rd_data_reg_sel & 0xfe;
420
421 local_irq_restore(flags);
422 }
423
424
425 /* Select a drive, update the FDC's track register and set the correct
426 * clock speed for this disk's type.
427 */
428
429 static void fd_select_drive( int drive )
430 {
431 unsigned long flags;
432 unsigned char tmp;
433
434 if (drive == SelectedDrive)
435 return;
436
437 /* protect against various other ints mucking around with the PSG */
438 local_irq_save(flags);
439 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */
440 tmp = sound_ym.rd_data_reg_sel;
441 sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1);
442 atari_dont_touch_floppy_select = 1;
443 local_irq_restore(flags);
444
445 /* restore track register to saved value */
446 FDC_WRITE( FDCREG_TRACK, UD.track );
447 udelay(25);
448
449 /* select 8/16 MHz */
450 if (UDT)
451 if (ATARIHW_PRESENT(FDCSPEED))
452 dma_wd.fdc_speed = UDT->fdc_speed;
453
454 SelectedDrive = drive;
455 }
456
457
458 /* Deselect both drives. */
459
460 static void fd_deselect( void )
461 {
462 unsigned long flags;
463
464 /* protect against various other ints mucking around with the PSG */
465 local_irq_save(flags);
466 atari_dont_touch_floppy_select = 0;
467 sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */
468 sound_ym.wd_data = (sound_ym.rd_data_reg_sel |
469 (MACH_IS_FALCON ? 3 : 7)); /* no drives selected */
470 /* On Falcon, the drive B select line is used on the printer port, so
471 * leave it alone... */
472 SelectedDrive = -1;
473 local_irq_restore(flags);
474 }
475
476
477 /* This timer function deselects the drives when the FDC switched the
478 * motor off. The deselection cannot happen earlier because the FDC
479 * counts the index signals, which arrive only if one drive is selected.
480 */
481
482 static void fd_motor_off_timer(struct timer_list *unused)
483 {
484 unsigned char status;
485
486 if (SelectedDrive < 0)
487 /* no drive selected, needn't deselect anyone */
488 return;
489
490 if (stdma_islocked())
491 goto retry;
492
493 status = FDC_READ( FDCREG_STATUS );
494
495 if (!(status & 0x80)) {
496 /* motor already turned off by FDC -> deselect drives */
497 MotorOn = 0;
498 fd_deselect();
499 return;
500 }
501 /* not yet off, try again */
502
503 retry:
504 /* Test again later; if tested too often, it seems there is no disk
505 * in the drive and the FDC will leave the motor on forever (or,
506 * at least until a disk is inserted). So we'll test only twice
507 * per second from then on...
508 */
509 mod_timer(&motor_off_timer,
510 jiffies + (MotorOffTrys++ < FD_MOTOR_OFF_MAXTRY ? HZ/20 : HZ/2));
511 }
512
513
514 /* This function is repeatedly called to detect disk changes (as good
515 * as possible) and keep track of the current state of the write protection.
516 */
517
518 static void check_change(struct timer_list *unused)
519 {
520 static int drive = 0;
521
522 unsigned long flags;
523 unsigned char old_porta;
524 int stat;
525
526 if (++drive > 1 || !UD.connected)
527 drive = 0;
528
529 /* protect against various other ints mucking around with the PSG */
530 local_irq_save(flags);
531
532 if (!stdma_islocked()) {
533 sound_ym.rd_data_reg_sel = 14;
534 old_porta = sound_ym.rd_data_reg_sel;
535 sound_ym.wd_data = (old_porta | DSKDRVNONE) &
536 ~(drive == 0 ? DSKDRV0 : DSKDRV1);
537 stat = !!(FDC_READ( FDCREG_STATUS ) & FDCSTAT_WPROT);
538 sound_ym.wd_data = old_porta;
539
540 if (stat != UD.wpstat) {
541 DPRINT(( "wpstat[%d] = %d\n", drive, stat ));
542 UD.wpstat = stat;
543 set_bit (drive, &changed_floppies);
544 }
545 }
546 local_irq_restore(flags);
547
548 start_check_change_timer();
549 }
550
551
552 /* Handling of the Head Settling Flag: This flag should be set after each
553 * seek operation, because we don't use seeks with verify.
554 */
555
556 static inline void set_head_settle_flag(void)
557 {
558 HeadSettleFlag = FDCCMDADD_E;
559 }
560
561 static inline int get_head_settle_flag(void)
562 {
563 int tmp = HeadSettleFlag;
564 HeadSettleFlag = 0;
565 return( tmp );
566 }
567
568 static inline void copy_buffer(void *from, void *to)
569 {
570 ulong *p1 = (ulong *)from, *p2 = (ulong *)to;
571 int cnt;
572
573 for (cnt = 512/4; cnt; cnt--)
574 *p2++ = *p1++;
575 }
576
577
578
579
580 /* General Interrupt Handling */
581
582 static void (*FloppyIRQHandler)( int status ) = NULL;
583
584 static irqreturn_t floppy_irq (int irq, void *dummy)
585 {
586 unsigned char status;
587 void (*handler)( int );
588
589 handler = xchg(&FloppyIRQHandler, NULL);
590
591 if (handler) {
592 nop();
593 status = FDC_READ( FDCREG_STATUS );
594 DPRINT(("FDC irq, status = %02x handler = %08lx\n",status,(unsigned long)handler));
595 handler( status );
596 }
597 else {
598 DPRINT(("FDC irq, no handler\n"));
599 }
600 return IRQ_HANDLED;
601 }
602
603
604 /* Error handling: If some error happened, retry some times, then
605 * recalibrate, then try again, and fail after MAX_ERRORS.
606 */
607
608 static void fd_error( void )
609 {
610 if (IsFormatting) {
611 IsFormatting = 0;
612 FormatError = 1;
613 complete(&format_wait);
614 return;
615 }
616
617 if (!fd_request)
618 return;
619
620 fd_request->error_count++;
621 if (fd_request->error_count >= MAX_ERRORS) {
622 printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive );
623 fd_end_request_cur(BLK_STS_IOERR);
624 }
625 else if (fd_request->error_count == RECALIBRATE_ERRORS) {
626 printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive );
627 if (SelectedDrive != -1)
628 SUD.track = -1;
629 }
630 redo_fd_request();
631 }
632
633
634
635 #define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0)
636
637
638 /* ---------- Formatting ---------- */
639
640 #define FILL(n,val) \
641 do { \
642 memset( p, val, n ); \
643 p += n; \
644 } while(0)
645
646 static int do_format(int drive, int type, struct atari_format_descr *desc)
647 {
648 unsigned char *p;
649 int sect, nsect;
650 unsigned long flags;
651
652 DPRINT(("do_format( dr=%d tr=%d he=%d offs=%d )\n",
653 drive, desc->track, desc->head, desc->sect_offset ));
654
655 wait_event(fdc_wait, cmpxchg(&fdc_busy, 0, 1) == 0);
656 local_irq_save(flags);
657 stdma_lock(floppy_irq, NULL);
658 atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */
659 local_irq_restore(flags);
660
661 if (type) {
662 if (--type >= NUM_DISK_MINORS ||
663 minor2disktype[type].drive_types > DriveType) {
664 redo_fd_request();
665 return -EINVAL;
666 }
667 type = minor2disktype[type].index;
668 UDT = &atari_disk_type[type];
669 }
670
671 if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) {
672 redo_fd_request();
673 return -EINVAL;
674 }
675
676 nsect = UDT->spt;
677 p = TrackBuffer;
678 /* The track buffer is used for the raw track data, so its
679 contents become invalid! */
680 BufferDrive = -1;
681 /* stop deselect timer */
682 del_timer( &motor_off_timer );
683
684 FILL( 60 * (nsect / 9), 0x4e );
685 for( sect = 0; sect < nsect; ++sect ) {
686 FILL( 12, 0 );
687 FILL( 3, 0xf5 );
688 *p++ = 0xfe;
689 *p++ = desc->track;
690 *p++ = desc->head;
691 *p++ = (nsect + sect - desc->sect_offset) % nsect + 1;
692 *p++ = 2;
693 *p++ = 0xf7;
694 FILL( 22, 0x4e );
695 FILL( 12, 0 );
696 FILL( 3, 0xf5 );
697 *p++ = 0xfb;
698 FILL( 512, 0xe5 );
699 *p++ = 0xf7;
700 FILL( 40, 0x4e );
701 }
702 FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e );
703
704 IsFormatting = 1;
705 FormatError = 0;
706 ReqTrack = desc->track;
707 ReqSide = desc->head;
708 do_fd_action( drive );
709
710 wait_for_completion(&format_wait);
711
712 redo_fd_request();
713 return( FormatError ? -EIO : 0 );
714 }
715
716
717 /* do_fd_action() is the general procedure for a fd request: All
718 * required parameter settings (drive select, side select, track
719 * position) are checked and set if needed. For each of these
720 * parameters and the actual reading or writing exist two functions:
721 * one that starts the setting (or skips it if possible) and one
722 * callback for the "done" interrupt. Each done func calls the next
723 * set function to propagate the request down to fd_rwsec_done().
724 */
725
726 static void do_fd_action( int drive )
727 {
728 DPRINT(("do_fd_action\n"));
729
730 if (UseTrackbuffer && !IsFormatting) {
731 repeat:
732 if (IS_BUFFERED( drive, ReqSide, ReqTrack )) {
733 if (ReqCmd == READ) {
734 copy_buffer( SECTOR_BUFFER(ReqSector), ReqData );
735 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) {
736 /* read next sector */
737 setup_req_params( drive );
738 goto repeat;
739 }
740 else {
741 /* all sectors finished */
742 fd_end_request_cur(BLK_STS_OK);
743 redo_fd_request();
744 return;
745 }
746 }
747 else {
748 /* cmd == WRITE, pay attention to track buffer
749 * consistency! */
750 copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) );
751 }
752 }
753 }
754
755 if (SelectedDrive != drive)
756 fd_select_drive( drive );
757
758 if (UD.track == -1)
759 fd_calibrate();
760 else if (UD.track != ReqTrack << UDT->stretch)
761 fd_seek();
762 else if (IsFormatting)
763 fd_writetrack();
764 else
765 fd_rwsec();
766 }
767
768
769 /* Seek to track 0 if the current track is unknown */
770
771 static void fd_calibrate( void )
772 {
773 if (SUD.track >= 0) {
774 fd_calibrate_done( 0 );
775 return;
776 }
777
778 if (ATARIHW_PRESENT(FDCSPEED))
779 dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */;
780 DPRINT(("fd_calibrate\n"));
781 SET_IRQ_HANDLER( fd_calibrate_done );
782 /* we can't verify, since the speed may be incorrect */
783 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate );
784
785 NeedSeek = 1;
786 MotorOn = 1;
787 start_timeout();
788 /* wait for IRQ */
789 }
790
791
792 static void fd_calibrate_done( int status )
793 {
794 DPRINT(("fd_calibrate_done()\n"));
795 stop_timeout();
796
797 /* set the correct speed now */
798 if (ATARIHW_PRESENT(FDCSPEED))
799 dma_wd.fdc_speed = SUDT->fdc_speed;
800 if (status & FDCSTAT_RECNF) {
801 printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive );
802 fd_error();
803 }
804 else {
805 SUD.track = 0;
806 fd_seek();
807 }
808 }
809
810
811 /* Seek the drive to the requested track. The drive must have been
812 * calibrated at some point before this.
813 */
814
815 static void fd_seek( void )
816 {
817 if (SUD.track == ReqTrack << SUDT->stretch) {
818 fd_seek_done( 0 );
819 return;
820 }
821
822 if (ATARIHW_PRESENT(FDCSPEED)) {
823 dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */
824 MFPDELAY();
825 }
826
827 DPRINT(("fd_seek() to track %d\n",ReqTrack));
828 FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch);
829 udelay(25);
830 SET_IRQ_HANDLER( fd_seek_done );
831 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate );
832
833 MotorOn = 1;
834 set_head_settle_flag();
835 start_timeout();
836 /* wait for IRQ */
837 }
838
839
840 static void fd_seek_done( int status )
841 {
842 DPRINT(("fd_seek_done()\n"));
843 stop_timeout();
844
845 /* set the correct speed */
846 if (ATARIHW_PRESENT(FDCSPEED))
847 dma_wd.fdc_speed = SUDT->fdc_speed;
848 if (status & FDCSTAT_RECNF) {
849 printk(KERN_ERR "fd%d: seek error (to track %d)\n",
850 SelectedDrive, ReqTrack );
851 /* we don't know exactly which track we are on now! */
852 SUD.track = -1;
853 fd_error();
854 }
855 else {
856 SUD.track = ReqTrack << SUDT->stretch;
857 NeedSeek = 0;
858 if (IsFormatting)
859 fd_writetrack();
860 else
861 fd_rwsec();
862 }
863 }
864
865
866 /* This does the actual reading/writing after positioning the head
867 * over the correct track.
868 */
869
870 static int MultReadInProgress = 0;
871
872
873 static void fd_rwsec( void )
874 {
875 unsigned long paddr, flags;
876 unsigned int rwflag, old_motoron;
877 unsigned int track;
878
879 DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector, ReqCmd == WRITE ? 'w' : 'r' ));
880 if (ReqCmd == WRITE) {
881 if (ATARIHW_PRESENT(EXTD_DMA)) {
882 paddr = virt_to_phys(ReqData);
883 }
884 else {
885 copy_buffer( ReqData, DMABuffer );
886 paddr = PhysDMABuffer;
887 }
888 dma_cache_maintenance( paddr, 512, 1 );
889 rwflag = 0x100;
890 }
891 else {
892 if (read_track)
893 paddr = PhysTrackBuffer;
894 else
895 paddr = ATARIHW_PRESENT(EXTD_DMA) ?
896 virt_to_phys(ReqData) : PhysDMABuffer;
897 rwflag = 0;
898 }
899
900 fd_select_side( ReqSide );
901
902 /* Start sector of this operation */
903 FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector );
904 MFPDELAY();
905 /* Cheat for track if stretch != 0 */
906 if (SUDT->stretch) {
907 track = FDC_READ( FDCREG_TRACK);
908 MFPDELAY();
909 FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch);
910 }
911 udelay(25);
912
913 /* Setup DMA */
914 local_irq_save(flags);
915 dma_wd.dma_lo = (unsigned char)paddr;
916 MFPDELAY();
917 paddr >>= 8;
918 dma_wd.dma_md = (unsigned char)paddr;
919 MFPDELAY();
920 paddr >>= 8;
921 if (ATARIHW_PRESENT(EXTD_DMA))
922 st_dma_ext_dmahi = (unsigned short)paddr;
923 else
924 dma_wd.dma_hi = (unsigned char)paddr;
925 MFPDELAY();
926 local_irq_restore(flags);
927
928 /* Clear FIFO and switch DMA to correct mode */
929 dma_wd.dma_mode_status = 0x90 | rwflag;
930 MFPDELAY();
931 dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100);
932 MFPDELAY();
933 dma_wd.dma_mode_status = 0x90 | rwflag;
934 MFPDELAY();
935
936 /* How many sectors for DMA */
937 dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1;
938
939 udelay(25);
940
941 /* Start operation */
942 dma_wd.dma_mode_status = FDCSELREG_STP | rwflag;
943 udelay(25);
944 SET_IRQ_HANDLER( fd_rwsec_done );
945 dma_wd.fdc_acces_seccount =
946 (get_head_settle_flag() |
947 (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0))));
948
949 old_motoron = MotorOn;
950 MotorOn = 1;
951 NeedSeek = 1;
952 /* wait for interrupt */
953
954 if (read_track) {
955 /* If reading a whole track, wait about one disk rotation and
956 * then check if all sectors are read. The FDC will even
957 * search for the first non-existent sector and need 1 sec to
958 * recognise that it isn't present :-(
959 */
960 MultReadInProgress = 1;
961 mod_timer(&readtrack_timer,
962 /* 1 rot. + 5 rot.s if motor was off */
963 jiffies + HZ/5 + (old_motoron ? 0 : HZ));
964 }
965 start_timeout();
966 }
967
968
969 static void fd_readtrack_check(struct timer_list *unused)
970 {
971 unsigned long flags, addr, addr2;
972
973 local_irq_save(flags);
974
975 if (!MultReadInProgress) {
976 /* This prevents a race condition that could arise if the
977 * interrupt is triggered while the calling of this timer
978 * callback function takes place. The IRQ function then has
979 * already cleared 'MultReadInProgress' when flow of control
980 * gets here.
981 */
982 local_irq_restore(flags);
983 return;
984 }
985
986 /* get the current DMA address */
987 /* ++ f.a. read twice to avoid being fooled by switcher */
988 addr = 0;
989 do {
990 addr2 = addr;
991 addr = dma_wd.dma_lo & 0xff;
992 MFPDELAY();
993 addr |= (dma_wd.dma_md & 0xff) << 8;
994 MFPDELAY();
995 if (ATARIHW_PRESENT( EXTD_DMA ))
996 addr |= (st_dma_ext_dmahi & 0xffff) << 16;
997 else
998 addr |= (dma_wd.dma_hi & 0xff) << 16;
999 MFPDELAY();
1000 } while(addr != addr2);
1001
1002 if (addr >= PhysTrackBuffer + SUDT->spt*512) {
1003 /* already read enough data, force an FDC interrupt to stop
1004 * the read operation
1005 */
1006 SET_IRQ_HANDLER( NULL );
1007 MultReadInProgress = 0;
1008 local_irq_restore(flags);
1009 DPRINT(("fd_readtrack_check(): done\n"));
1010 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
1011 udelay(25);
1012
1013 /* No error until now -- the FDC would have interrupted
1014 * otherwise!
1015 */
1016 fd_rwsec_done1(0);
1017 }
1018 else {
1019 /* not yet finished, wait another tenth rotation */
1020 local_irq_restore(flags);
1021 DPRINT(("fd_readtrack_check(): not yet finished\n"));
1022 mod_timer(&readtrack_timer, jiffies + HZ/5/10);
1023 }
1024 }
1025
1026
1027 static void fd_rwsec_done( int status )
1028 {
1029 DPRINT(("fd_rwsec_done()\n"));
1030
1031 if (read_track) {
1032 del_timer(&readtrack_timer);
1033 if (!MultReadInProgress)
1034 return;
1035 MultReadInProgress = 0;
1036 }
1037 fd_rwsec_done1(status);
1038 }
1039
1040 static void fd_rwsec_done1(int status)
1041 {
1042 unsigned int track;
1043
1044 stop_timeout();
1045
1046 /* Correct the track if stretch != 0 */
1047 if (SUDT->stretch) {
1048 track = FDC_READ( FDCREG_TRACK);
1049 MFPDELAY();
1050 FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch);
1051 }
1052
1053 if (!UseTrackbuffer) {
1054 dma_wd.dma_mode_status = 0x90;
1055 MFPDELAY();
1056 if (!(dma_wd.dma_mode_status & 0x01)) {
1057 printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive );
1058 goto err_end;
1059 }
1060 }
1061 MFPDELAY();
1062
1063 if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) {
1064 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive );
1065 goto err_end;
1066 }
1067 if ((status & FDCSTAT_RECNF) &&
1068 /* RECNF is no error after a multiple read when the FDC
1069 searched for a non-existent sector! */
1070 !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) {
1071 if (Probing) {
1072 if (SUDT > atari_disk_type) {
1073 if (SUDT[-1].blocks > ReqBlock) {
1074 /* try another disk type */
1075 SUDT--;
1076 set_capacity(unit[SelectedDrive].disk,
1077 SUDT->blocks);
1078 } else
1079 Probing = 0;
1080 }
1081 else {
1082 if (SUD.flags & FTD_MSG)
1083 printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n",
1084 SelectedDrive, SUDT->name );
1085 Probing=0;
1086 }
1087 } else {
1088 /* record not found, but not probing. Maybe stretch wrong ? Restart probing */
1089 if (SUD.autoprobe) {
1090 SUDT = atari_disk_type + StartDiskType[DriveType];
1091 set_capacity(unit[SelectedDrive].disk,
1092 SUDT->blocks);
1093 Probing = 1;
1094 }
1095 }
1096 if (Probing) {
1097 if (ATARIHW_PRESENT(FDCSPEED)) {
1098 dma_wd.fdc_speed = SUDT->fdc_speed;
1099 MFPDELAY();
1100 }
1101 setup_req_params( SelectedDrive );
1102 BufferDrive = -1;
1103 do_fd_action( SelectedDrive );
1104 return;
1105 }
1106
1107 printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n",
1108 SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack );
1109 goto err_end;
1110 }
1111 if (status & FDCSTAT_CRC) {
1112 printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n",
1113 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) );
1114 goto err_end;
1115 }
1116 if (status & FDCSTAT_LOST) {
1117 printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n",
1118 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) );
1119 goto err_end;
1120 }
1121
1122 Probing = 0;
1123
1124 if (ReqCmd == READ) {
1125 if (!read_track) {
1126 void *addr;
1127 addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer;
1128 dma_cache_maintenance( virt_to_phys(addr), 512, 0 );
1129 if (!ATARIHW_PRESENT( EXTD_DMA ))
1130 copy_buffer (addr, ReqData);
1131 } else {
1132 dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 );
1133 BufferDrive = SelectedDrive;
1134 BufferSide = ReqSide;
1135 BufferTrack = ReqTrack;
1136 copy_buffer (SECTOR_BUFFER (ReqSector), ReqData);
1137 }
1138 }
1139
1140 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) {
1141 /* read next sector */
1142 setup_req_params( SelectedDrive );
1143 do_fd_action( SelectedDrive );
1144 }
1145 else {
1146 /* all sectors finished */
1147 fd_end_request_cur(BLK_STS_OK);
1148 redo_fd_request();
1149 }
1150 return;
1151
1152 err_end:
1153 BufferDrive = -1;
1154 fd_error();
1155 }
1156
1157
1158 static void fd_writetrack( void )
1159 {
1160 unsigned long paddr, flags;
1161 unsigned int track;
1162
1163 DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide ));
1164
1165 paddr = PhysTrackBuffer;
1166 dma_cache_maintenance( paddr, BUFFER_SIZE, 1 );
1167
1168 fd_select_side( ReqSide );
1169
1170 /* Cheat for track if stretch != 0 */
1171 if (SUDT->stretch) {
1172 track = FDC_READ( FDCREG_TRACK);
1173 MFPDELAY();
1174 FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch);
1175 }
1176 udelay(40);
1177
1178 /* Setup DMA */
1179 local_irq_save(flags);
1180 dma_wd.dma_lo = (unsigned char)paddr;
1181 MFPDELAY();
1182 paddr >>= 8;
1183 dma_wd.dma_md = (unsigned char)paddr;
1184 MFPDELAY();
1185 paddr >>= 8;
1186 if (ATARIHW_PRESENT( EXTD_DMA ))
1187 st_dma_ext_dmahi = (unsigned short)paddr;
1188 else
1189 dma_wd.dma_hi = (unsigned char)paddr;
1190 MFPDELAY();
1191 local_irq_restore(flags);
1192
1193 /* Clear FIFO and switch DMA to correct mode */
1194 dma_wd.dma_mode_status = 0x190;
1195 MFPDELAY();
1196 dma_wd.dma_mode_status = 0x90;
1197 MFPDELAY();
1198 dma_wd.dma_mode_status = 0x190;
1199 MFPDELAY();
1200
1201 /* How many sectors for DMA */
1202 dma_wd.fdc_acces_seccount = BUFFER_SIZE/512;
1203 udelay(40);
1204
1205 /* Start operation */
1206 dma_wd.dma_mode_status = FDCSELREG_STP | 0x100;
1207 udelay(40);
1208 SET_IRQ_HANDLER( fd_writetrack_done );
1209 dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag();
1210
1211 MotorOn = 1;
1212 start_timeout();
1213 /* wait for interrupt */
1214 }
1215
1216
1217 static void fd_writetrack_done( int status )
1218 {
1219 DPRINT(("fd_writetrack_done()\n"));
1220
1221 stop_timeout();
1222
1223 if (status & FDCSTAT_WPROT) {
1224 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive );
1225 goto err_end;
1226 }
1227 if (status & FDCSTAT_LOST) {
1228 printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n",
1229 SelectedDrive, ReqSide, ReqTrack );
1230 goto err_end;
1231 }
1232
1233 complete(&format_wait);
1234 return;
1235
1236 err_end:
1237 fd_error();
1238 }
1239
1240 static void fd_times_out(struct timer_list *unused)
1241 {
1242 atari_disable_irq( IRQ_MFP_FDC );
1243 if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but
1244 * before we came here... */
1245
1246 SET_IRQ_HANDLER( NULL );
1247 /* If the timeout occurred while the readtrack_check timer was
1248 * active, we need to cancel it, else bad things will happen */
1249 if (UseTrackbuffer)
1250 del_timer( &readtrack_timer );
1251 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
1252 udelay( 25 );
1253
1254 printk(KERN_ERR "floppy timeout\n" );
1255 fd_error();
1256 end:
1257 atari_enable_irq( IRQ_MFP_FDC );
1258 }
1259
1260
1261 /* The (noop) seek operation here is needed to make the WP bit in the
1262 * FDC status register accessible for check_change. If the last disk
1263 * operation would have been a RDSEC, this bit would always read as 0
1264 * no matter what :-( To save time, the seek goes to the track we're
1265 * already on.
1266 */
1267
1268 static void finish_fdc( void )
1269 {
1270 if (!NeedSeek) {
1271 finish_fdc_done( 0 );
1272 }
1273 else {
1274 DPRINT(("finish_fdc: dummy seek started\n"));
1275 FDC_WRITE (FDCREG_DATA, SUD.track);
1276 SET_IRQ_HANDLER( finish_fdc_done );
1277 FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK);
1278 MotorOn = 1;
1279 start_timeout();
1280 /* we must wait for the IRQ here, because the ST-DMA
1281 is released immediately afterwards and the interrupt
1282 may be delivered to the wrong driver. */
1283 }
1284 }
1285
1286
1287 static void finish_fdc_done( int dummy )
1288 {
1289 unsigned long flags;
1290
1291 DPRINT(("finish_fdc_done entered\n"));
1292 stop_timeout();
1293 NeedSeek = 0;
1294
1295 if (timer_pending(&fd_timer) && time_before(fd_timer.expires, jiffies + 5))
1296 /* If the check for a disk change is done too early after this
1297 * last seek command, the WP bit still reads wrong :-((
1298 */
1299 mod_timer(&fd_timer, jiffies + 5);
1300 else
1301 start_check_change_timer();
1302 start_motor_off_timer();
1303
1304 local_irq_save(flags);
1305 stdma_release();
1306 fdc_busy = 0;
1307 wake_up( &fdc_wait );
1308 local_irq_restore(flags);
1309
1310 DPRINT(("finish_fdc() finished\n"));
1311 }
1312
1313 /* The detection of disk changes is a dark chapter in Atari history :-(
1314 * Because the "Drive ready" signal isn't present in the Atari
1315 * hardware, one has to rely on the "Write Protect". This works fine,
1316 * as long as no write protected disks are used. TOS solves this
1317 * problem by introducing tri-state logic ("maybe changed") and
1318 * looking at the serial number in block 0. This isn't possible for
1319 * Linux, since the floppy driver can't make assumptions about the
1320 * filesystem used on the disk and thus the contents of block 0. I've
1321 * chosen the method to always say "The disk was changed" if it is
1322 * unsure whether it was. This implies that every open or mount
1323 * invalidates the disk buffers if you work with write protected
1324 * disks. But at least this is better than working with incorrect data
1325 * due to unrecognised disk changes.
1326 */
1327
1328 static unsigned int floppy_check_events(struct gendisk *disk,
1329 unsigned int clearing)
1330 {
1331 struct atari_floppy_struct *p = disk->private_data;
1332 unsigned int drive = p - unit;
1333 if (test_bit (drive, &fake_change)) {
1334 /* simulated change (e.g. after formatting) */
1335 return DISK_EVENT_MEDIA_CHANGE;
1336 }
1337 if (test_bit (drive, &changed_floppies)) {
1338 /* surely changed (the WP signal changed at least once) */
1339 return DISK_EVENT_MEDIA_CHANGE;
1340 }
1341 if (UD.wpstat) {
1342 /* WP is on -> could be changed: to be sure, buffers should be
1343 * invalidated...
1344 */
1345 return DISK_EVENT_MEDIA_CHANGE;
1346 }
1347
1348 return 0;
1349 }
1350
1351 static int floppy_revalidate(struct gendisk *disk)
1352 {
1353 struct atari_floppy_struct *p = disk->private_data;
1354 unsigned int drive = p - unit;
1355
1356 if (test_bit(drive, &changed_floppies) ||
1357 test_bit(drive, &fake_change) ||
1358 p->disktype == 0) {
1359 if (UD.flags & FTD_MSG)
1360 printk(KERN_ERR "floppy: clear format %p!\n", UDT);
1361 BufferDrive = -1;
1362 clear_bit(drive, &fake_change);
1363 clear_bit(drive, &changed_floppies);
1364 /* MSch: clearing geometry makes sense only for autoprobe
1365 formats, for 'permanent user-defined' parameter:
1366 restore default_params[] here if flagged valid! */
1367 if (default_params[drive].blocks == 0)
1368 UDT = NULL;
1369 else
1370 UDT = &default_params[drive];
1371 }
1372 return 0;
1373 }
1374
1375
1376 /* This sets up the global variables describing the current request. */
1377
1378 static void setup_req_params( int drive )
1379 {
1380 int block = ReqBlock + ReqCnt;
1381
1382 ReqTrack = block / UDT->spt;
1383 ReqSector = block - ReqTrack * UDT->spt + 1;
1384 ReqSide = ReqTrack & 1;
1385 ReqTrack >>= 1;
1386 ReqData = ReqBuffer + 512 * ReqCnt;
1387
1388 if (UseTrackbuffer)
1389 read_track = (ReqCmd == READ && fd_request->error_count == 0);
1390 else
1391 read_track = 0;
1392
1393 DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide,
1394 ReqTrack, ReqSector, (unsigned long)ReqData ));
1395 }
1396
1397 /*
1398 * Round-robin between our available drives, doing one request from each
1399 */
1400 static struct request *set_next_request(void)
1401 {
1402 struct request_queue *q;
1403 int old_pos = fdc_queue;
1404 struct request *rq = NULL;
1405
1406 do {
1407 q = unit[fdc_queue].disk->queue;
1408 if (++fdc_queue == FD_MAX_UNITS)
1409 fdc_queue = 0;
1410 if (q) {
1411 rq = blk_fetch_request(q);
1412 if (rq) {
1413 rq->error_count = 0;
1414 break;
1415 }
1416 }
1417 } while (fdc_queue != old_pos);
1418
1419 return rq;
1420 }
1421
1422
1423 static void redo_fd_request(void)
1424 {
1425 int drive, type;
1426 struct atari_floppy_struct *floppy;
1427
1428 DPRINT(("redo_fd_request: fd_request=%p dev=%s fd_request->sector=%ld\n",
1429 fd_request, fd_request ? fd_request->rq_disk->disk_name : "",
1430 fd_request ? blk_rq_pos(fd_request) : 0 ));
1431
1432 IsFormatting = 0;
1433
1434 repeat:
1435 if (!fd_request) {
1436 fd_request = set_next_request();
1437 if (!fd_request)
1438 goto the_end;
1439 }
1440
1441 floppy = fd_request->rq_disk->private_data;
1442 drive = floppy - unit;
1443 type = floppy->type;
1444
1445 if (!UD.connected) {
1446 /* drive not connected */
1447 printk(KERN_ERR "Unknown Device: fd%d\n", drive );
1448 fd_end_request_cur(BLK_STS_IOERR);
1449 goto repeat;
1450 }
1451
1452 if (type == 0) {
1453 if (!UDT) {
1454 Probing = 1;
1455 UDT = atari_disk_type + StartDiskType[DriveType];
1456 set_capacity(floppy->disk, UDT->blocks);
1457 UD.autoprobe = 1;
1458 }
1459 }
1460 else {
1461 /* user supplied disk type */
1462 if (--type >= NUM_DISK_MINORS) {
1463 printk(KERN_WARNING "fd%d: invalid disk format", drive );
1464 fd_end_request_cur(BLK_STS_IOERR);
1465 goto repeat;
1466 }
1467 if (minor2disktype[type].drive_types > DriveType) {
1468 printk(KERN_WARNING "fd%d: unsupported disk format", drive );
1469 fd_end_request_cur(BLK_STS_IOERR);
1470 goto repeat;
1471 }
1472 type = minor2disktype[type].index;
1473 UDT = &atari_disk_type[type];
1474 set_capacity(floppy->disk, UDT->blocks);
1475 UD.autoprobe = 0;
1476 }
1477
1478 if (blk_rq_pos(fd_request) + 1 > UDT->blocks) {
1479 fd_end_request_cur(BLK_STS_IOERR);
1480 goto repeat;
1481 }
1482
1483 /* stop deselect timer */
1484 del_timer( &motor_off_timer );
1485
1486 ReqCnt = 0;
1487 ReqCmd = rq_data_dir(fd_request);
1488 ReqBlock = blk_rq_pos(fd_request);
1489 ReqBuffer = bio_data(fd_request->bio);
1490 setup_req_params( drive );
1491 do_fd_action( drive );
1492
1493 return;
1494
1495 the_end:
1496 finish_fdc();
1497 }
1498
1499
1500 void do_fd_request(struct request_queue * q)
1501 {
1502 DPRINT(("do_fd_request for pid %d\n",current->pid));
1503 wait_event(fdc_wait, cmpxchg(&fdc_busy, 0, 1) == 0);
1504 stdma_lock(floppy_irq, NULL);
1505
1506 atari_disable_irq( IRQ_MFP_FDC );
1507 redo_fd_request();
1508 atari_enable_irq( IRQ_MFP_FDC );
1509 }
1510
1511 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1512 unsigned int cmd, unsigned long param)
1513 {
1514 struct gendisk *disk = bdev->bd_disk;
1515 struct atari_floppy_struct *floppy = disk->private_data;
1516 int drive = floppy - unit;
1517 int type = floppy->type;
1518 struct atari_format_descr fmt_desc;
1519 struct atari_disk_type *dtp;
1520 struct floppy_struct getprm;
1521 int settype;
1522 struct floppy_struct setprm;
1523 void __user *argp = (void __user *)param;
1524
1525 switch (cmd) {
1526 case FDGETPRM:
1527 if (type) {
1528 if (--type >= NUM_DISK_MINORS)
1529 return -ENODEV;
1530 if (minor2disktype[type].drive_types > DriveType)
1531 return -ENODEV;
1532 type = minor2disktype[type].index;
1533 dtp = &atari_disk_type[type];
1534 if (UD.flags & FTD_MSG)
1535 printk (KERN_ERR "floppy%d: found dtp %p name %s!\n",
1536 drive, dtp, dtp->name);
1537 }
1538 else {
1539 if (!UDT)
1540 return -ENXIO;
1541 else
1542 dtp = UDT;
1543 }
1544 memset((void *)&getprm, 0, sizeof(getprm));
1545 getprm.size = dtp->blocks;
1546 getprm.sect = dtp->spt;
1547 getprm.head = 2;
1548 getprm.track = dtp->blocks/dtp->spt/2;
1549 getprm.stretch = dtp->stretch;
1550 if (copy_to_user(argp, &getprm, sizeof(getprm)))
1551 return -EFAULT;
1552 return 0;
1553 }
1554 switch (cmd) {
1555 case FDSETPRM:
1556 case FDDEFPRM:
1557 /*
1558 * MSch 7/96: simple 'set geometry' case: just set the
1559 * 'default' device params (minor == 0).
1560 * Currently, the drive geometry is cleared after each
1561 * disk change and subsequent revalidate()! simple
1562 * implementation of FDDEFPRM: save geometry from a
1563 * FDDEFPRM call and restore it in floppy_revalidate() !
1564 */
1565
1566 /* get the parameters from user space */
1567 if (floppy->ref != 1 && floppy->ref != -1)
1568 return -EBUSY;
1569 if (copy_from_user(&setprm, argp, sizeof(setprm)))
1570 return -EFAULT;
1571 /*
1572 * first of all: check for floppy change and revalidate,
1573 * or the next access will revalidate - and clear UDT :-(
1574 */
1575
1576 if (floppy_check_events(disk, 0))
1577 floppy_revalidate(disk);
1578
1579 if (UD.flags & FTD_MSG)
1580 printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n",
1581 drive, setprm.size, setprm.sect, setprm.stretch);
1582
1583 /* what if type > 0 here? Overwrite specified entry ? */
1584 if (type) {
1585 /* refuse to re-set a predefined type for now */
1586 redo_fd_request();
1587 return -EINVAL;
1588 }
1589
1590 /*
1591 * type == 0: first look for a matching entry in the type list,
1592 * and set the UD.disktype field to use the perdefined entry.
1593 * TODO: add user-defined format to head of autoprobe list ?
1594 * Useful to include the user-type for future autodetection!
1595 */
1596
1597 for (settype = 0; settype < NUM_DISK_MINORS; settype++) {
1598 int setidx = 0;
1599 if (minor2disktype[settype].drive_types > DriveType) {
1600 /* skip this one, invalid for drive ... */
1601 continue;
1602 }
1603 setidx = minor2disktype[settype].index;
1604 dtp = &atari_disk_type[setidx];
1605
1606 /* found matching entry ?? */
1607 if ( dtp->blocks == setprm.size
1608 && dtp->spt == setprm.sect
1609 && dtp->stretch == setprm.stretch ) {
1610 if (UD.flags & FTD_MSG)
1611 printk (KERN_INFO "floppy%d: setting %s %p!\n",
1612 drive, dtp->name, dtp);
1613 UDT = dtp;
1614 set_capacity(floppy->disk, UDT->blocks);
1615
1616 if (cmd == FDDEFPRM) {
1617 /* save settings as permanent default type */
1618 default_params[drive].name = dtp->name;
1619 default_params[drive].spt = dtp->spt;
1620 default_params[drive].blocks = dtp->blocks;
1621 default_params[drive].fdc_speed = dtp->fdc_speed;
1622 default_params[drive].stretch = dtp->stretch;
1623 }
1624
1625 return 0;
1626 }
1627
1628 }
1629
1630 /* no matching disk type found above - setting user_params */
1631
1632 if (cmd == FDDEFPRM) {
1633 /* set permanent type */
1634 dtp = &default_params[drive];
1635 } else
1636 /* set user type (reset by disk change!) */
1637 dtp = &user_params[drive];
1638
1639 dtp->name = "user format";
1640 dtp->blocks = setprm.size;
1641 dtp->spt = setprm.sect;
1642 if (setprm.sect > 14)
1643 dtp->fdc_speed = 3;
1644 else
1645 dtp->fdc_speed = 0;
1646 dtp->stretch = setprm.stretch;
1647
1648 if (UD.flags & FTD_MSG)
1649 printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n",
1650 drive, dtp->blocks, dtp->spt, dtp->stretch);
1651
1652 /* sanity check */
1653 if (setprm.track != dtp->blocks/dtp->spt/2 ||
1654 setprm.head != 2) {
1655 redo_fd_request();
1656 return -EINVAL;
1657 }
1658
1659 UDT = dtp;
1660 set_capacity(floppy->disk, UDT->blocks);
1661
1662 return 0;
1663 case FDMSGON:
1664 UD.flags |= FTD_MSG;
1665 return 0;
1666 case FDMSGOFF:
1667 UD.flags &= ~FTD_MSG;
1668 return 0;
1669 case FDSETEMSGTRESH:
1670 return -EINVAL;
1671 case FDFMTBEG:
1672 return 0;
1673 case FDFMTTRK:
1674 if (floppy->ref != 1 && floppy->ref != -1)
1675 return -EBUSY;
1676 if (copy_from_user(&fmt_desc, argp, sizeof(fmt_desc)))
1677 return -EFAULT;
1678 return do_format(drive, type, &fmt_desc);
1679 case FDCLRPRM:
1680 UDT = NULL;
1681 /* MSch: invalidate default_params */
1682 default_params[drive].blocks = 0;
1683 set_capacity(floppy->disk, MAX_DISK_SIZE * 2);
1684 case FDFMTEND:
1685 case FDFLUSH:
1686 /* invalidate the buffer track to force a reread */
1687 BufferDrive = -1;
1688 set_bit(drive, &fake_change);
1689 check_disk_change(bdev);
1690 return 0;
1691 default:
1692 return -EINVAL;
1693 }
1694 }
1695
1696 static int fd_ioctl(struct block_device *bdev, fmode_t mode,
1697 unsigned int cmd, unsigned long arg)
1698 {
1699 int ret;
1700
1701 mutex_lock(&ataflop_mutex);
1702 ret = fd_locked_ioctl(bdev, mode, cmd, arg);
1703 mutex_unlock(&ataflop_mutex);
1704
1705 return ret;
1706 }
1707
1708 /* Initialize the 'unit' variable for drive 'drive' */
1709
1710 static void __init fd_probe( int drive )
1711 {
1712 UD.connected = 0;
1713 UDT = NULL;
1714
1715 if (!fd_test_drive_present( drive ))
1716 return;
1717
1718 UD.connected = 1;
1719 UD.track = 0;
1720 switch( UserSteprate[drive] ) {
1721 case 2:
1722 UD.steprate = FDCSTEP_2;
1723 break;
1724 case 3:
1725 UD.steprate = FDCSTEP_3;
1726 break;
1727 case 6:
1728 UD.steprate = FDCSTEP_6;
1729 break;
1730 case 12:
1731 UD.steprate = FDCSTEP_12;
1732 break;
1733 default: /* should be -1 for "not set by user" */
1734 if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA)
1735 UD.steprate = FDCSTEP_3;
1736 else
1737 UD.steprate = FDCSTEP_6;
1738 break;
1739 }
1740 MotorOn = 1; /* from probe restore operation! */
1741 }
1742
1743
1744 /* This function tests the physical presence of a floppy drive (not
1745 * whether a disk is inserted). This is done by issuing a restore
1746 * command, waiting max. 2 seconds (that should be enough to move the
1747 * head across the whole disk) and looking at the state of the "TR00"
1748 * signal. This should now be raised if there is a drive connected
1749 * (and there is no hardware failure :-) Otherwise, the drive is
1750 * declared absent.
1751 */
1752
1753 static int __init fd_test_drive_present( int drive )
1754 {
1755 unsigned long timeout;
1756 unsigned char status;
1757 int ok;
1758
1759 if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 );
1760 fd_select_drive( drive );
1761
1762 /* disable interrupt temporarily */
1763 atari_turnoff_irq( IRQ_MFP_FDC );
1764 FDC_WRITE (FDCREG_TRACK, 0xff00);
1765 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 );
1766
1767 timeout = jiffies + 2*HZ+HZ/2;
1768 while (time_before(jiffies, timeout))
1769 if (!(st_mfp.par_dt_reg & 0x20))
1770 break;
1771
1772 status = FDC_READ( FDCREG_STATUS );
1773 ok = (status & FDCSTAT_TR00) != 0;
1774
1775 /* force interrupt to abort restore operation (FDC would try
1776 * about 50 seconds!) */
1777 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
1778 udelay(500);
1779 status = FDC_READ( FDCREG_STATUS );
1780 udelay(20);
1781
1782 if (ok) {
1783 /* dummy seek command to make WP bit accessible */
1784 FDC_WRITE( FDCREG_DATA, 0 );
1785 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK );
1786 while( st_mfp.par_dt_reg & 0x20 )
1787 ;
1788 status = FDC_READ( FDCREG_STATUS );
1789 }
1790
1791 atari_turnon_irq( IRQ_MFP_FDC );
1792 return( ok );
1793 }
1794
1795
1796 /* Look how many and which kind of drives are connected. If there are
1797 * floppies, additionally start the disk-change and motor-off timers.
1798 */
1799
1800 static void __init config_types( void )
1801 {
1802 int drive, cnt = 0;
1803
1804 /* for probing drives, set the FDC speed to 8 MHz */
1805 if (ATARIHW_PRESENT(FDCSPEED))
1806 dma_wd.fdc_speed = 0;
1807
1808 printk(KERN_INFO "Probing floppy drive(s):\n");
1809 for( drive = 0; drive < FD_MAX_UNITS; drive++ ) {
1810 fd_probe( drive );
1811 if (UD.connected) {
1812 printk(KERN_INFO "fd%d\n", drive);
1813 ++cnt;
1814 }
1815 }
1816
1817 if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) {
1818 /* If FDC is still busy from probing, give it another FORCI
1819 * command to abort the operation. If this isn't done, the FDC
1820 * will interrupt later and its IRQ line stays low, because
1821 * the status register isn't read. And this will block any
1822 * interrupts on this IRQ line :-(
1823 */
1824 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
1825 udelay(500);
1826 FDC_READ( FDCREG_STATUS );
1827 udelay(20);
1828 }
1829
1830 if (cnt > 0) {
1831 start_motor_off_timer();
1832 if (cnt == 1) fd_select_drive( 0 );
1833 start_check_change_timer();
1834 }
1835 }
1836
1837 /*
1838 * floppy_open check for aliasing (/dev/fd0 can be the same as
1839 * /dev/PS0 etc), and disallows simultaneous access to the same
1840 * drive with different device numbers.
1841 */
1842
1843 static int floppy_open(struct block_device *bdev, fmode_t mode)
1844 {
1845 struct atari_floppy_struct *p = bdev->bd_disk->private_data;
1846 int type = MINOR(bdev->bd_dev) >> 2;
1847
1848 DPRINT(("fd_open: type=%d\n",type));
1849 if (p->ref && p->type != type)
1850 return -EBUSY;
1851
1852 if (p->ref == -1 || (p->ref && mode & FMODE_EXCL))
1853 return -EBUSY;
1854
1855 if (mode & FMODE_EXCL)
1856 p->ref = -1;
1857 else
1858 p->ref++;
1859
1860 p->type = type;
1861
1862 if (mode & FMODE_NDELAY)
1863 return 0;
1864
1865 if (mode & (FMODE_READ|FMODE_WRITE)) {
1866 check_disk_change(bdev);
1867 if (mode & FMODE_WRITE) {
1868 if (p->wpstat) {
1869 if (p->ref < 0)
1870 p->ref = 0;
1871 else
1872 p->ref--;
1873 return -EROFS;
1874 }
1875 }
1876 }
1877 return 0;
1878 }
1879
1880 static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
1881 {
1882 int ret;
1883
1884 mutex_lock(&ataflop_mutex);
1885 ret = floppy_open(bdev, mode);
1886 mutex_unlock(&ataflop_mutex);
1887
1888 return ret;
1889 }
1890
1891 static void floppy_release(struct gendisk *disk, fmode_t mode)
1892 {
1893 struct atari_floppy_struct *p = disk->private_data;
1894 mutex_lock(&ataflop_mutex);
1895 if (p->ref < 0)
1896 p->ref = 0;
1897 else if (!p->ref--) {
1898 printk(KERN_ERR "floppy_release with fd_ref == 0");
1899 p->ref = 0;
1900 }
1901 mutex_unlock(&ataflop_mutex);
1902 }
1903
1904 static const struct block_device_operations floppy_fops = {
1905 .owner = THIS_MODULE,
1906 .open = floppy_unlocked_open,
1907 .release = floppy_release,
1908 .ioctl = fd_ioctl,
1909 .check_events = floppy_check_events,
1910 .revalidate_disk= floppy_revalidate,
1911 };
1912
1913 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
1914 {
1915 int drive = *part & 3;
1916 int type = *part >> 2;
1917 if (drive >= FD_MAX_UNITS || type > NUM_DISK_MINORS)
1918 return NULL;
1919 *part = 0;
1920 return get_disk_and_module(unit[drive].disk);
1921 }
1922
1923 static int __init atari_floppy_init (void)
1924 {
1925 int i;
1926
1927 if (!MACH_IS_ATARI)
1928 /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */
1929 return -ENODEV;
1930
1931 if (register_blkdev(FLOPPY_MAJOR,"fd"))
1932 return -EBUSY;
1933
1934 for (i = 0; i < FD_MAX_UNITS; i++) {
1935 unit[i].disk = alloc_disk(1);
1936 if (!unit[i].disk)
1937 goto Enomem;
1938 }
1939
1940 if (UseTrackbuffer < 0)
1941 /* not set by user -> use default: for now, we turn
1942 track buffering off for all Medusas, though it
1943 could be used with ones that have a counter
1944 card. But the test is too hard :-( */
1945 UseTrackbuffer = !MACH_IS_MEDUSA;
1946
1947 /* initialize variables */
1948 SelectedDrive = -1;
1949 BufferDrive = -1;
1950
1951 DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop");
1952 if (!DMABuffer) {
1953 printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n");
1954 goto Enomem;
1955 }
1956 TrackBuffer = DMABuffer + 512;
1957 PhysDMABuffer = atari_stram_to_phys(DMABuffer);
1958 PhysTrackBuffer = virt_to_phys(TrackBuffer);
1959 BufferDrive = BufferSide = BufferTrack = -1;
1960
1961 for (i = 0; i < FD_MAX_UNITS; i++) {
1962 unit[i].track = -1;
1963 unit[i].flags = 0;
1964 unit[i].disk->major = FLOPPY_MAJOR;
1965 unit[i].disk->first_minor = i;
1966 sprintf(unit[i].disk->disk_name, "fd%d", i);
1967 unit[i].disk->fops = &floppy_fops;
1968 unit[i].disk->private_data = &unit[i];
1969 unit[i].disk->queue = blk_init_queue(do_fd_request,
1970 &ataflop_lock);
1971 if (!unit[i].disk->queue)
1972 goto Enomem;
1973 set_capacity(unit[i].disk, MAX_DISK_SIZE * 2);
1974 add_disk(unit[i].disk);
1975 }
1976
1977 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
1978 floppy_find, NULL, NULL);
1979
1980 printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n",
1981 DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E',
1982 UseTrackbuffer ? "" : "no ");
1983 config_types();
1984
1985 return 0;
1986 Enomem:
1987 while (i--) {
1988 struct request_queue *q = unit[i].disk->queue;
1989
1990 put_disk(unit[i].disk);
1991 if (q)
1992 blk_cleanup_queue(q);
1993 }
1994
1995 unregister_blkdev(FLOPPY_MAJOR, "fd");
1996 return -ENOMEM;
1997 }
1998
1999 #ifndef MODULE
2000 static int __init atari_floppy_setup(char *str)
2001 {
2002 int ints[3 + FD_MAX_UNITS];
2003 int i;
2004
2005 if (!MACH_IS_ATARI)
2006 return 0;
2007
2008 str = get_options(str, 3 + FD_MAX_UNITS, ints);
2009
2010 if (ints[0] < 1) {
2011 printk(KERN_ERR "ataflop_setup: no arguments!\n" );
2012 return 0;
2013 }
2014 else if (ints[0] > 2+FD_MAX_UNITS) {
2015 printk(KERN_ERR "ataflop_setup: too many arguments\n" );
2016 }
2017
2018 if (ints[1] < 0 || ints[1] > 2)
2019 printk(KERN_ERR "ataflop_setup: bad drive type\n" );
2020 else
2021 DriveType = ints[1];
2022
2023 if (ints[0] >= 2)
2024 UseTrackbuffer = (ints[2] > 0);
2025
2026 for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) {
2027 if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12)
2028 printk(KERN_ERR "ataflop_setup: bad steprate\n" );
2029 else
2030 UserSteprate[i-3] = ints[i];
2031 }
2032 return 1;
2033 }
2034
2035 __setup("floppy=", atari_floppy_setup);
2036 #endif
2037
2038 static void __exit atari_floppy_exit(void)
2039 {
2040 int i;
2041 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
2042 for (i = 0; i < FD_MAX_UNITS; i++) {
2043 struct request_queue *q = unit[i].disk->queue;
2044
2045 del_gendisk(unit[i].disk);
2046 put_disk(unit[i].disk);
2047 blk_cleanup_queue(q);
2048 }
2049 unregister_blkdev(FLOPPY_MAJOR, "fd");
2050
2051 del_timer_sync(&fd_timer);
2052 atari_stram_free( DMABuffer );
2053 }
2054
2055 module_init(atari_floppy_init)
2056 module_exit(atari_floppy_exit)
2057
2058 MODULE_LICENSE("GPL");
Linux with added FPC-III support