1 // SPDX-License-Identifier: GPL-2.0-only
3 * drivers/block/ataflop.c
5 * Copyright (C) 1993 Greg Harp
6 * Atari Support by Bjoern Brauel, Roman Hodek
8 * Big cleanup Sep 11..14 1994 Roman Hodek:
9 * - Driver now works interrupt driven
10 * - Support for two drives; should work, but I cannot test that :-(
11 * - Reading is done in whole tracks and buffered to speed up things
12 * - Disk change detection and drive deselecting after motor-off
14 * - Autodetection of disk format (DD/HD); untested yet, because I
15 * don't have an HD drive :-(
17 * Fixes Nov 13 1994 Martin Schaller:
18 * - Autodetection works now
19 * - Support for 5 1/4'' disks
20 * - Removed drive type (unknown on atari)
21 * - Do seeks with 8 Mhz
23 * Changes by Andreas Schwab:
24 * - After errors in multiple read mode try again reading single sectors
26 * - Clean up error handling
27 * - Set blk_size for proper size checking
28 * - Initialize track register when testing presence of floppy
29 * - Implement some ioctl's
31 * Changes by Torsten Lang:
32 * - When probing the floppies we should add the FDCCMDADD_H flag since
33 * the FDC will otherwise wait forever when no disk is inserted...
35 * ++ Freddi Aschwanden (fa) 20.9.95 fixes for medusa:
36 * - MFPDELAY() after each FDC access -> atari
37 * - more/other disk formats
38 * - DMA to the block buffer directly if we have a 32bit DMA
39 * - for medusa, the step rate is always 3ms
40 * - on medusa, use only cache_push()
42 * - Make disk format numbering independent from minors
43 * - Let user set max. supported drive type (speeds up format
44 * detection, saves buffer space)
47 * - implement some more ioctls
51 * - increase gap size at start of track for HD/ED disks
53 * Michael (MSch) 11/07/96:
54 * - implemented FDSETPRM and FDDEFPRM ioctl
57 * - implemented missing BLK* ioctls
61 * - Maybe a better strategy for disk change detection (does anyone
65 #include <linux/module.h>
68 #include <linux/delay.h>
69 #include <linux/init.h>
70 #include <linux/blk-mq.h>
71 #include <linux/mutex.h>
72 #include <linux/completion.h>
73 #include <linux/wait.h>
75 #include <asm/atariints.h>
76 #include <asm/atari_stdma.h>
77 #include <asm/atari_stram.h>
79 #define FD_MAX_UNITS 2
83 static DEFINE_MUTEX(ataflop_mutex);
84 static struct request *fd_request;
92 #define FDCSELREG_STP (0x80) /* command/status register */
93 #define FDCSELREG_TRA (0x82) /* track register */
94 #define FDCSELREG_SEC (0x84) /* sector register */
95 #define FDCSELREG_DTA (0x86) /* data register */
97 /* register names for FDC_READ/WRITE macros */
100 #define FDCREG_STATUS 0
101 #define FDCREG_TRACK 2
102 #define FDCREG_SECTOR 4
103 #define FDCREG_DATA 6
105 /* command opcodes */
107 #define FDCCMD_RESTORE (0x00) /* - */
108 #define FDCCMD_SEEK (0x10) /* | */
109 #define FDCCMD_STEP (0x20) /* | TYP 1 Commands */
110 #define FDCCMD_STIN (0x40) /* | */
111 #define FDCCMD_STOT (0x60) /* - */
112 #define FDCCMD_RDSEC (0x80) /* - TYP 2 Commands */
113 #define FDCCMD_WRSEC (0xa0) /* - " */
114 #define FDCCMD_RDADR (0xc0) /* - */
115 #define FDCCMD_RDTRA (0xe0) /* | TYP 3 Commands */
116 #define FDCCMD_WRTRA (0xf0) /* - */
117 #define FDCCMD_FORCI (0xd0) /* - TYP 4 Command */
119 /* command modifier bits */
121 #define FDCCMDADD_SR6 (0x00) /* step rate settings */
122 #define FDCCMDADD_SR12 (0x01)
123 #define FDCCMDADD_SR2 (0x02)
124 #define FDCCMDADD_SR3 (0x03)
125 #define FDCCMDADD_V (0x04) /* verify */
126 #define FDCCMDADD_H (0x08) /* wait for spin-up */
127 #define FDCCMDADD_U (0x10) /* update track register */
128 #define FDCCMDADD_M (0x10) /* multiple sector access */
129 #define FDCCMDADD_E (0x04) /* head settling flag */
130 #define FDCCMDADD_P (0x02) /* precompensation off */
131 #define FDCCMDADD_A0 (0x01) /* DAM flag */
133 /* status register bits */
135 #define FDCSTAT_MOTORON (0x80) /* motor on */
136 #define FDCSTAT_WPROT (0x40) /* write protected (FDCCMD_WR*) */
137 #define FDCSTAT_SPINUP (0x20) /* motor speed stable (Type I) */
138 #define FDCSTAT_DELDAM (0x20) /* sector has deleted DAM (Type II+III) */
139 #define FDCSTAT_RECNF (0x10) /* record not found */
140 #define FDCSTAT_CRC (0x08) /* CRC error */
141 #define FDCSTAT_TR00 (0x04) /* Track 00 flag (Type I) */
142 #define FDCSTAT_LOST (0x04) /* Lost Data (Type II+III) */
143 #define FDCSTAT_IDX (0x02) /* Index status (Type I) */
144 #define FDCSTAT_DRQ (0x02) /* DRQ status (Type II+III) */
145 #define FDCSTAT_BUSY (0x01) /* FDC is busy */
148 /* PSG Port A Bit Nr 0 .. Side Sel .. 0 -> Side 1 1 -> Side 2 */
149 #define DSKSIDE (0x01)
151 #define DSKDRVNONE (0x06)
152 #define DSKDRV0 (0x02)
153 #define DSKDRV1 (0x04)
156 #define FDCSTEP_6 0x00
157 #define FDCSTEP_12 0x01
158 #define FDCSTEP_2 0x02
159 #define FDCSTEP_3 0x03
161 struct atari_format_descr {
162 int track; /* to be formatted */
163 int head; /* "" "" */
164 int sect_offset; /* offset of first sector */
167 /* Disk types: DD, HD, ED */
168 static struct atari_disk_type {
170 unsigned spt; /* sectors per track */
171 unsigned blocks; /* total number of blocks */
172 unsigned fdc_speed; /* fdc_speed setting */
173 unsigned stretch; /* track doubling ? */
174 } atari_disk_type[] = {
175 { "d360", 9, 720, 0, 0}, /* 0: 360kB diskette */
176 { "D360", 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */
177 { "D720", 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */
178 { "D820", 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */
179 /* formats above are probed for type DD */
180 #define MAX_TYPE_DD 3
181 { "h1200",15,2400, 3, 0}, /* 4: 1.2MB diskette */
182 { "H1440",18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */
183 { "H1640",20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */
184 /* formats above are probed for types DD and HD */
185 #define MAX_TYPE_HD 6
186 { "E2880",36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */
187 { "E3280",40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */
188 /* formats above are probed for types DD, HD and ED */
189 #define MAX_TYPE_ED 8
190 /* types below are never autoprobed */
191 { "H1680",21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */
192 { "h410",10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */
193 { "h1476",18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */
194 { "H1722",21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */
195 { "h420",10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */
196 { "H830",10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */
197 { "h1494",18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */
198 { "H1743",21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */
199 { "h880",11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */
200 { "D1040",13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */
201 { "D1120",14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */
202 { "h1600",20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */
203 { "H1760",22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */
204 { "H1920",24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */
205 { "E3200",40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */
206 { "E3520",44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */
207 { "E3840",48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */
208 { "H1840",23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */
209 { "D800",10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */
212 static int StartDiskType[] = {
222 static int DriveType = TYPE_HD;
224 static DEFINE_SPINLOCK(ataflop_lock);
226 /* Array for translating minors into disk formats */
229 unsigned drive_types;
230 } minor2disktype[] = {
231 { 0, TYPE_DD }, /* 1: d360 */
232 { 4, TYPE_HD }, /* 2: h1200 */
233 { 1, TYPE_DD }, /* 3: D360 */
234 { 2, TYPE_DD }, /* 4: D720 */
235 { 1, TYPE_DD }, /* 5: h360 = D360 */
236 { 2, TYPE_DD }, /* 6: h720 = D720 */
237 { 5, TYPE_HD }, /* 7: H1440 */
238 { 7, TYPE_ED }, /* 8: E2880 */
239 /* some PC formats :-) */
240 { 8, TYPE_ED }, /* 9: E3280 <- was "CompaQ" == E2880 for PC */
241 { 5, TYPE_HD }, /* 10: h1440 = H1440 */
242 { 9, TYPE_HD }, /* 11: H1680 */
243 { 10, TYPE_DD }, /* 12: h410 */
244 { 3, TYPE_DD }, /* 13: H820 <- == D820, 82x10 */
245 { 11, TYPE_HD }, /* 14: h1476 */
246 { 12, TYPE_HD }, /* 15: H1722 */
247 { 13, TYPE_DD }, /* 16: h420 */
248 { 14, TYPE_DD }, /* 17: H830 */
249 { 15, TYPE_HD }, /* 18: h1494 */
250 { 16, TYPE_HD }, /* 19: H1743 */
251 { 17, TYPE_DD }, /* 20: h880 */
252 { 18, TYPE_DD }, /* 21: D1040 */
253 { 19, TYPE_DD }, /* 22: D1120 */
254 { 20, TYPE_HD }, /* 23: h1600 */
255 { 21, TYPE_HD }, /* 24: H1760 */
256 { 22, TYPE_HD }, /* 25: H1920 */
257 { 23, TYPE_ED }, /* 26: E3200 */
258 { 24, TYPE_ED }, /* 27: E3520 */
259 { 25, TYPE_ED }, /* 28: E3840 */
260 { 26, TYPE_HD }, /* 29: H1840 */
261 { 27, TYPE_DD }, /* 30: D800 */
262 { 6, TYPE_HD }, /* 31: H1640 <- was H1600 == h1600 for PC */
265 #define NUM_DISK_MINORS ARRAY_SIZE(minor2disktype)
268 * Maximum disk size (in kilobytes). This default is used whenever the
269 * current disk size is unknown.
271 #define MAX_DISK_SIZE 3280
274 * MSch: User-provided type information. 'drive' points to
275 * the respective entry of this array. Set by FDSETPRM ioctls.
277 static struct atari_disk_type user_params[FD_MAX_UNITS];
280 * User-provided permanent type information. 'drive' points to
281 * the respective entry of this array. Set by FDDEFPRM ioctls,
282 * restored upon disk change by floppy_revalidate() if valid (as seen by
283 * default_params[].blocks > 0 - a bit in unit[].flags might be used for this?)
285 static struct atari_disk_type default_params[FD_MAX_UNITS];
287 /* current info on each unit */
288 static struct atari_floppy_struct {
289 int connected; /* !=0 : drive is connected */
290 int autoprobe; /* !=0 : do autoprobe */
292 struct atari_disk_type *disktype; /* current type of disk */
294 int track; /* current head position or -1 if
296 unsigned int steprate; /* steprate setting */
297 unsigned int wpstat; /* current state of WP signal (for
298 disk change detection) */
299 int flags; /* flags */
300 struct gendisk *disk;
303 struct blk_mq_tag_set tag_set;
304 } unit[FD_MAX_UNITS];
306 #define UD unit[drive]
307 #define UDT unit[drive].disktype
308 #define SUD unit[SelectedDrive]
309 #define SUDT unit[SelectedDrive].disktype
312 #define FDC_READ(reg) ({ \
313 /* unsigned long __flags; */ \
314 unsigned short __val; \
315 /* local_irq_save(__flags); */ \
316 dma_wd.dma_mode_status = 0x80 | (reg); \
318 __val = dma_wd.fdc_acces_seccount; \
320 /* local_irq_restore(__flags); */ \
324 #define FDC_WRITE(reg,val) \
326 /* unsigned long __flags; */ \
327 /* local_irq_save(__flags); */ \
328 dma_wd.dma_mode_status = 0x80 | (reg); \
330 dma_wd.fdc_acces_seccount = (val); \
332 /* local_irq_restore(__flags); */ \
336 /* Buffering variables:
337 * First, there is a DMA buffer in ST-RAM that is used for floppy DMA
338 * operations. Second, a track buffer is used to cache a whole track
339 * of the disk to save read operations. These are two separate buffers
340 * because that allows write operations without clearing the track buffer.
343 static int MaxSectors[] = {
346 static int BufferSize[] = {
347 15*512, 30*512, 60*512
350 #define BUFFER_SIZE (BufferSize[DriveType])
352 unsigned char *DMABuffer; /* buffer for writes */
353 static unsigned long PhysDMABuffer; /* physical address */
355 static int UseTrackbuffer = -1; /* Do track buffering? */
356 module_param(UseTrackbuffer, int, 0);
358 unsigned char *TrackBuffer; /* buffer for reads */
359 static unsigned long PhysTrackBuffer; /* physical address */
360 static int BufferDrive, BufferSide, BufferTrack;
361 static int read_track; /* non-zero if we are reading whole tracks */
363 #define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512)
364 #define IS_BUFFERED(drive,side,track) \
365 (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track))
368 * These are global variables, as that's the easiest way to give
369 * information to interrupts. They are the data used for the current
372 static int SelectedDrive = 0;
373 static int ReqCmd, ReqBlock;
374 static int ReqSide, ReqTrack, ReqSector, ReqCnt;
375 static int HeadSettleFlag = 0;
376 static unsigned char *ReqData, *ReqBuffer;
377 static int MotorOn = 0, MotorOffTrys;
378 static int IsFormatting = 0, FormatError;
380 static int UserSteprate[FD_MAX_UNITS] = { -1, -1 };
381 module_param_array(UserSteprate, int, NULL, 0);
383 static DECLARE_COMPLETION(format_wait);
385 static unsigned long changed_floppies = 0xff, fake_change = 0;
386 #define CHECK_CHANGE_DELAY HZ/2
388 #define FD_MOTOR_OFF_DELAY (3*HZ)
389 #define FD_MOTOR_OFF_MAXTRY (10*20)
391 #define FLOPPY_TIMEOUT (6*HZ)
392 #define RECALIBRATE_ERRORS 4 /* After this many errors the drive
393 * will be recalibrated. */
394 #define MAX_ERRORS 8 /* After this many errors the driver
399 * The driver is trying to determine the correct media format
400 * while Probing is set. fd_rwsec_done() clears it after a
403 static int Probing = 0;
405 /* This flag is set when a dummy seek is necessary to make the WP
406 * status bit accessible.
408 static int NeedSeek = 0;
412 #define DPRINT(a) printk a
417 /***************************** Prototypes *****************************/
419 static void fd_select_side( int side );
420 static void fd_select_drive( int drive );
421 static void fd_deselect( void );
422 static void fd_motor_off_timer(struct timer_list *unused);
423 static void check_change(struct timer_list *unused);
424 static irqreturn_t floppy_irq (int irq, void *dummy);
425 static void fd_error( void );
426 static int do_format(int drive, int type, struct atari_format_descr *desc);
427 static void do_fd_action( int drive );
428 static void fd_calibrate( void );
429 static void fd_calibrate_done( int status );
430 static void fd_seek( void );
431 static void fd_seek_done( int status );
432 static void fd_rwsec( void );
433 static void fd_readtrack_check(struct timer_list *unused);
434 static void fd_rwsec_done( int status );
435 static void fd_rwsec_done1(int status);
436 static void fd_writetrack( void );
437 static void fd_writetrack_done( int status );
438 static void fd_times_out(struct timer_list *unused);
439 static void finish_fdc( void );
440 static void finish_fdc_done( int dummy );
441 static void setup_req_params( int drive );
442 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
443 cmd, unsigned long param);
444 static void fd_probe( int drive );
445 static int fd_test_drive_present( int drive );
446 static void config_types( void );
447 static int floppy_open(struct block_device *bdev, fmode_t mode);
448 static void floppy_release(struct gendisk *disk, fmode_t mode);
450 /************************* End of Prototypes **************************/
452 static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer);
453 static DEFINE_TIMER(readtrack_timer, fd_readtrack_check);
454 static DEFINE_TIMER(timeout_timer, fd_times_out);
455 static DEFINE_TIMER(fd_timer, check_change);
457 static void fd_end_request_cur(blk_status_t err)
459 if (!blk_update_request(fd_request, err,
460 blk_rq_cur_bytes(fd_request))) {
461 __blk_mq_end_request(fd_request, err);
466 static inline void start_motor_off_timer(void)
468 mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY);
472 static inline void start_check_change_timer( void )
474 mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY);
477 static inline void start_timeout(void)
479 mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT);
482 static inline void stop_timeout(void)
484 del_timer(&timeout_timer);
487 /* Select the side to use. */
489 static void fd_select_side( int side )
493 /* protect against various other ints mucking around with the PSG */
494 local_irq_save(flags);
496 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */
497 sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 :
498 sound_ym.rd_data_reg_sel & 0xfe;
500 local_irq_restore(flags);
504 /* Select a drive, update the FDC's track register and set the correct
505 * clock speed for this disk's type.
508 static void fd_select_drive( int drive )
513 if (drive == SelectedDrive)
516 /* protect against various other ints mucking around with the PSG */
517 local_irq_save(flags);
518 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */
519 tmp = sound_ym.rd_data_reg_sel;
520 sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1);
521 atari_dont_touch_floppy_select = 1;
522 local_irq_restore(flags);
524 /* restore track register to saved value */
525 FDC_WRITE( FDCREG_TRACK, UD.track );
528 /* select 8/16 MHz */
530 if (ATARIHW_PRESENT(FDCSPEED))
531 dma_wd.fdc_speed = UDT->fdc_speed;
533 SelectedDrive = drive;
537 /* Deselect both drives. */
539 static void fd_deselect( void )
543 /* protect against various other ints mucking around with the PSG */
544 local_irq_save(flags);
545 atari_dont_touch_floppy_select = 0;
546 sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */
547 sound_ym.wd_data = (sound_ym.rd_data_reg_sel |
548 (MACH_IS_FALCON ? 3 : 7)); /* no drives selected */
549 /* On Falcon, the drive B select line is used on the printer port, so
550 * leave it alone... */
552 local_irq_restore(flags);
556 /* This timer function deselects the drives when the FDC switched the
557 * motor off. The deselection cannot happen earlier because the FDC
558 * counts the index signals, which arrive only if one drive is selected.
561 static void fd_motor_off_timer(struct timer_list *unused)
563 unsigned char status;
565 if (SelectedDrive < 0)
566 /* no drive selected, needn't deselect anyone */
569 if (stdma_islocked())
572 status = FDC_READ( FDCREG_STATUS );
574 if (!(status & 0x80)) {
575 /* motor already turned off by FDC -> deselect drives */
580 /* not yet off, try again */
583 /* Test again later; if tested too often, it seems there is no disk
584 * in the drive and the FDC will leave the motor on forever (or,
585 * at least until a disk is inserted). So we'll test only twice
586 * per second from then on...
588 mod_timer(&motor_off_timer,
589 jiffies + (MotorOffTrys++ < FD_MOTOR_OFF_MAXTRY ? HZ/20 : HZ/2));
593 /* This function is repeatedly called to detect disk changes (as good
594 * as possible) and keep track of the current state of the write protection.
597 static void check_change(struct timer_list *unused)
599 static int drive = 0;
602 unsigned char old_porta;
605 if (++drive > 1 || !UD.connected)
608 /* protect against various other ints mucking around with the PSG */
609 local_irq_save(flags);
611 if (!stdma_islocked()) {
612 sound_ym.rd_data_reg_sel = 14;
613 old_porta = sound_ym.rd_data_reg_sel;
614 sound_ym.wd_data = (old_porta | DSKDRVNONE) &
615 ~(drive == 0 ? DSKDRV0 : DSKDRV1);
616 stat = !!(FDC_READ( FDCREG_STATUS ) & FDCSTAT_WPROT);
617 sound_ym.wd_data = old_porta;
619 if (stat != UD.wpstat) {
620 DPRINT(( "wpstat[%d] = %d\n", drive, stat ));
622 set_bit (drive, &changed_floppies);
625 local_irq_restore(flags);
627 start_check_change_timer();
631 /* Handling of the Head Settling Flag: This flag should be set after each
632 * seek operation, because we don't use seeks with verify.
635 static inline void set_head_settle_flag(void)
637 HeadSettleFlag = FDCCMDADD_E;
640 static inline int get_head_settle_flag(void)
642 int tmp = HeadSettleFlag;
647 static inline void copy_buffer(void *from, void *to)
649 ulong *p1 = (ulong *)from, *p2 = (ulong *)to;
652 for (cnt = 512/4; cnt; cnt--)
656 /* General Interrupt Handling */
658 static void (*FloppyIRQHandler)( int status ) = NULL;
660 static irqreturn_t floppy_irq (int irq, void *dummy)
662 unsigned char status;
663 void (*handler)( int );
665 handler = xchg(&FloppyIRQHandler, NULL);
669 status = FDC_READ( FDCREG_STATUS );
670 DPRINT(("FDC irq, status = %02x handler = %08lx\n",status,(unsigned long)handler));
674 DPRINT(("FDC irq, no handler\n"));
680 /* Error handling: If some error happened, retry some times, then
681 * recalibrate, then try again, and fail after MAX_ERRORS.
684 static void fd_error( void )
689 complete(&format_wait);
696 fd_request->error_count++;
697 if (fd_request->error_count >= MAX_ERRORS) {
698 printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive );
699 fd_end_request_cur(BLK_STS_IOERR);
701 else if (fd_request->error_count == RECALIBRATE_ERRORS) {
702 printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive );
703 if (SelectedDrive != -1)
710 #define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0)
713 /* ---------- Formatting ---------- */
715 #define FILL(n,val) \
717 memset( p, val, n ); \
721 static int do_format(int drive, int type, struct atari_format_descr *desc)
723 struct request_queue *q = unit[drive].disk->queue;
729 blk_mq_freeze_queue(q);
730 blk_mq_quiesce_queue(q);
732 local_irq_save(flags);
733 stdma_lock(floppy_irq, NULL);
734 atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */
735 local_irq_restore(flags);
738 if (--type >= NUM_DISK_MINORS ||
739 minor2disktype[type].drive_types > DriveType) {
743 type = minor2disktype[type].index;
744 UDT = &atari_disk_type[type];
747 if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) {
754 /* The track buffer is used for the raw track data, so its
755 contents become invalid! */
757 /* stop deselect timer */
758 del_timer( &motor_off_timer );
760 FILL( 60 * (nsect / 9), 0x4e );
761 for( sect = 0; sect < nsect; ++sect ) {
767 *p++ = (nsect + sect - desc->sect_offset) % nsect + 1;
778 FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e );
782 ReqTrack = desc->track;
783 ReqSide = desc->head;
784 do_fd_action( drive );
786 wait_for_completion(&format_wait);
788 ret = FormatError ? -EIO : 0;
790 blk_mq_unquiesce_queue(q);
791 blk_mq_unfreeze_queue(q);
796 /* do_fd_action() is the general procedure for a fd request: All
797 * required parameter settings (drive select, side select, track
798 * position) are checked and set if needed. For each of these
799 * parameters and the actual reading or writing exist two functions:
800 * one that starts the setting (or skips it if possible) and one
801 * callback for the "done" interrupt. Each done func calls the next
802 * set function to propagate the request down to fd_rwsec_done().
805 static void do_fd_action( int drive )
807 DPRINT(("do_fd_action\n"));
809 if (UseTrackbuffer && !IsFormatting) {
811 if (IS_BUFFERED( drive, ReqSide, ReqTrack )) {
812 if (ReqCmd == READ) {
813 copy_buffer( SECTOR_BUFFER(ReqSector), ReqData );
814 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) {
815 /* read next sector */
816 setup_req_params( drive );
820 /* all sectors finished */
821 fd_end_request_cur(BLK_STS_OK);
826 /* cmd == WRITE, pay attention to track buffer
828 copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) );
833 if (SelectedDrive != drive)
834 fd_select_drive( drive );
838 else if (UD.track != ReqTrack << UDT->stretch)
840 else if (IsFormatting)
847 /* Seek to track 0 if the current track is unknown */
849 static void fd_calibrate( void )
851 if (SUD.track >= 0) {
852 fd_calibrate_done( 0 );
856 if (ATARIHW_PRESENT(FDCSPEED))
857 dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */;
858 DPRINT(("fd_calibrate\n"));
859 SET_IRQ_HANDLER( fd_calibrate_done );
860 /* we can't verify, since the speed may be incorrect */
861 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate );
870 static void fd_calibrate_done( int status )
872 DPRINT(("fd_calibrate_done()\n"));
875 /* set the correct speed now */
876 if (ATARIHW_PRESENT(FDCSPEED))
877 dma_wd.fdc_speed = SUDT->fdc_speed;
878 if (status & FDCSTAT_RECNF) {
879 printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive );
889 /* Seek the drive to the requested track. The drive must have been
890 * calibrated at some point before this.
893 static void fd_seek( void )
895 if (SUD.track == ReqTrack << SUDT->stretch) {
900 if (ATARIHW_PRESENT(FDCSPEED)) {
901 dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */
905 DPRINT(("fd_seek() to track %d\n",ReqTrack));
906 FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch);
908 SET_IRQ_HANDLER( fd_seek_done );
909 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate );
912 set_head_settle_flag();
918 static void fd_seek_done( int status )
920 DPRINT(("fd_seek_done()\n"));
923 /* set the correct speed */
924 if (ATARIHW_PRESENT(FDCSPEED))
925 dma_wd.fdc_speed = SUDT->fdc_speed;
926 if (status & FDCSTAT_RECNF) {
927 printk(KERN_ERR "fd%d: seek error (to track %d)\n",
928 SelectedDrive, ReqTrack );
929 /* we don't know exactly which track we are on now! */
934 SUD.track = ReqTrack << SUDT->stretch;
944 /* This does the actual reading/writing after positioning the head
945 * over the correct track.
948 static int MultReadInProgress = 0;
951 static void fd_rwsec( void )
953 unsigned long paddr, flags;
954 unsigned int rwflag, old_motoron;
957 DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector, ReqCmd == WRITE ? 'w' : 'r' ));
958 if (ReqCmd == WRITE) {
959 if (ATARIHW_PRESENT(EXTD_DMA)) {
960 paddr = virt_to_phys(ReqData);
963 copy_buffer( ReqData, DMABuffer );
964 paddr = PhysDMABuffer;
966 dma_cache_maintenance( paddr, 512, 1 );
971 paddr = PhysTrackBuffer;
973 paddr = ATARIHW_PRESENT(EXTD_DMA) ?
974 virt_to_phys(ReqData) : PhysDMABuffer;
978 fd_select_side( ReqSide );
980 /* Start sector of this operation */
981 FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector );
983 /* Cheat for track if stretch != 0 */
985 track = FDC_READ( FDCREG_TRACK);
987 FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch);
992 local_irq_save(flags);
993 dma_wd.dma_lo = (unsigned char)paddr;
996 dma_wd.dma_md = (unsigned char)paddr;
999 if (ATARIHW_PRESENT(EXTD_DMA))
1000 st_dma_ext_dmahi = (unsigned short)paddr;
1002 dma_wd.dma_hi = (unsigned char)paddr;
1004 local_irq_restore(flags);
1006 /* Clear FIFO and switch DMA to correct mode */
1007 dma_wd.dma_mode_status = 0x90 | rwflag;
1009 dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100);
1011 dma_wd.dma_mode_status = 0x90 | rwflag;
1014 /* How many sectors for DMA */
1015 dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1;
1019 /* Start operation */
1020 dma_wd.dma_mode_status = FDCSELREG_STP | rwflag;
1022 SET_IRQ_HANDLER( fd_rwsec_done );
1023 dma_wd.fdc_acces_seccount =
1024 (get_head_settle_flag() |
1025 (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0))));
1027 old_motoron = MotorOn;
1030 /* wait for interrupt */
1033 /* If reading a whole track, wait about one disk rotation and
1034 * then check if all sectors are read. The FDC will even
1035 * search for the first non-existent sector and need 1 sec to
1036 * recognise that it isn't present :-(
1038 MultReadInProgress = 1;
1039 mod_timer(&readtrack_timer,
1040 /* 1 rot. + 5 rot.s if motor was off */
1041 jiffies + HZ/5 + (old_motoron ? 0 : HZ));
1047 static void fd_readtrack_check(struct timer_list *unused)
1049 unsigned long flags, addr, addr2;
1051 local_irq_save(flags);
1053 if (!MultReadInProgress) {
1054 /* This prevents a race condition that could arise if the
1055 * interrupt is triggered while the calling of this timer
1056 * callback function takes place. The IRQ function then has
1057 * already cleared 'MultReadInProgress' when flow of control
1060 local_irq_restore(flags);
1064 /* get the current DMA address */
1065 /* ++ f.a. read twice to avoid being fooled by switcher */
1069 addr = dma_wd.dma_lo & 0xff;
1071 addr |= (dma_wd.dma_md & 0xff) << 8;
1073 if (ATARIHW_PRESENT( EXTD_DMA ))
1074 addr |= (st_dma_ext_dmahi & 0xffff) << 16;
1076 addr |= (dma_wd.dma_hi & 0xff) << 16;
1078 } while(addr != addr2);
1080 if (addr >= PhysTrackBuffer + SUDT->spt*512) {
1081 /* already read enough data, force an FDC interrupt to stop
1082 * the read operation
1084 SET_IRQ_HANDLER( NULL );
1085 MultReadInProgress = 0;
1086 local_irq_restore(flags);
1087 DPRINT(("fd_readtrack_check(): done\n"));
1088 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
1091 /* No error until now -- the FDC would have interrupted
1097 /* not yet finished, wait another tenth rotation */
1098 local_irq_restore(flags);
1099 DPRINT(("fd_readtrack_check(): not yet finished\n"));
1100 mod_timer(&readtrack_timer, jiffies + HZ/5/10);
1105 static void fd_rwsec_done( int status )
1107 DPRINT(("fd_rwsec_done()\n"));
1110 del_timer(&readtrack_timer);
1111 if (!MultReadInProgress)
1113 MultReadInProgress = 0;
1115 fd_rwsec_done1(status);
1118 static void fd_rwsec_done1(int status)
1124 /* Correct the track if stretch != 0 */
1125 if (SUDT->stretch) {
1126 track = FDC_READ( FDCREG_TRACK);
1128 FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch);
1131 if (!UseTrackbuffer) {
1132 dma_wd.dma_mode_status = 0x90;
1134 if (!(dma_wd.dma_mode_status & 0x01)) {
1135 printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive );
1141 if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) {
1142 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive );
1145 if ((status & FDCSTAT_RECNF) &&
1146 /* RECNF is no error after a multiple read when the FDC
1147 searched for a non-existent sector! */
1148 !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) {
1150 if (SUDT > atari_disk_type) {
1151 if (SUDT[-1].blocks > ReqBlock) {
1152 /* try another disk type */
1154 set_capacity(unit[SelectedDrive].disk,
1160 if (SUD.flags & FTD_MSG)
1161 printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n",
1162 SelectedDrive, SUDT->name );
1166 /* record not found, but not probing. Maybe stretch wrong ? Restart probing */
1167 if (SUD.autoprobe) {
1168 SUDT = atari_disk_type + StartDiskType[DriveType];
1169 set_capacity(unit[SelectedDrive].disk,
1175 if (ATARIHW_PRESENT(FDCSPEED)) {
1176 dma_wd.fdc_speed = SUDT->fdc_speed;
1179 setup_req_params( SelectedDrive );
1181 do_fd_action( SelectedDrive );
1185 printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n",
1186 SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack );
1189 if (status & FDCSTAT_CRC) {
1190 printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n",
1191 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) );
1194 if (status & FDCSTAT_LOST) {
1195 printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n",
1196 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) );
1202 if (ReqCmd == READ) {
1205 addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer;
1206 dma_cache_maintenance( virt_to_phys(addr), 512, 0 );
1207 if (!ATARIHW_PRESENT( EXTD_DMA ))
1208 copy_buffer (addr, ReqData);
1210 dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 );
1211 BufferDrive = SelectedDrive;
1212 BufferSide = ReqSide;
1213 BufferTrack = ReqTrack;
1214 copy_buffer (SECTOR_BUFFER (ReqSector), ReqData);
1218 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) {
1219 /* read next sector */
1220 setup_req_params( SelectedDrive );
1221 do_fd_action( SelectedDrive );
1224 /* all sectors finished */
1226 fd_end_request_cur(BLK_STS_OK);
1236 static void fd_writetrack( void )
1238 unsigned long paddr, flags;
1241 DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide ));
1243 paddr = PhysTrackBuffer;
1244 dma_cache_maintenance( paddr, BUFFER_SIZE, 1 );
1246 fd_select_side( ReqSide );
1248 /* Cheat for track if stretch != 0 */
1249 if (SUDT->stretch) {
1250 track = FDC_READ( FDCREG_TRACK);
1252 FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch);
1257 local_irq_save(flags);
1258 dma_wd.dma_lo = (unsigned char)paddr;
1261 dma_wd.dma_md = (unsigned char)paddr;
1264 if (ATARIHW_PRESENT( EXTD_DMA ))
1265 st_dma_ext_dmahi = (unsigned short)paddr;
1267 dma_wd.dma_hi = (unsigned char)paddr;
1269 local_irq_restore(flags);
1271 /* Clear FIFO and switch DMA to correct mode */
1272 dma_wd.dma_mode_status = 0x190;
1274 dma_wd.dma_mode_status = 0x90;
1276 dma_wd.dma_mode_status = 0x190;
1279 /* How many sectors for DMA */
1280 dma_wd.fdc_acces_seccount = BUFFER_SIZE/512;
1283 /* Start operation */
1284 dma_wd.dma_mode_status = FDCSELREG_STP | 0x100;
1286 SET_IRQ_HANDLER( fd_writetrack_done );
1287 dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag();
1291 /* wait for interrupt */
1295 static void fd_writetrack_done( int status )
1297 DPRINT(("fd_writetrack_done()\n"));
1301 if (status & FDCSTAT_WPROT) {
1302 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive );
1305 if (status & FDCSTAT_LOST) {
1306 printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n",
1307 SelectedDrive, ReqSide, ReqTrack );
1311 complete(&format_wait);
1318 static void fd_times_out(struct timer_list *unused)
1320 atari_disable_irq( IRQ_MFP_FDC );
1321 if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but
1322 * before we came here... */
1324 SET_IRQ_HANDLER( NULL );
1325 /* If the timeout occurred while the readtrack_check timer was
1326 * active, we need to cancel it, else bad things will happen */
1328 del_timer( &readtrack_timer );
1329 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
1332 printk(KERN_ERR "floppy timeout\n" );
1335 atari_enable_irq( IRQ_MFP_FDC );
1339 /* The (noop) seek operation here is needed to make the WP bit in the
1340 * FDC status register accessible for check_change. If the last disk
1341 * operation would have been a RDSEC, this bit would always read as 0
1342 * no matter what :-( To save time, the seek goes to the track we're
1346 static void finish_fdc( void )
1349 finish_fdc_done( 0 );
1352 DPRINT(("finish_fdc: dummy seek started\n"));
1353 FDC_WRITE (FDCREG_DATA, SUD.track);
1354 SET_IRQ_HANDLER( finish_fdc_done );
1355 FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK);
1358 /* we must wait for the IRQ here, because the ST-DMA
1359 is released immediately afterwards and the interrupt
1360 may be delivered to the wrong driver. */
1365 static void finish_fdc_done( int dummy )
1367 unsigned long flags;
1369 DPRINT(("finish_fdc_done entered\n"));
1373 if (timer_pending(&fd_timer) && time_before(fd_timer.expires, jiffies + 5))
1374 /* If the check for a disk change is done too early after this
1375 * last seek command, the WP bit still reads wrong :-((
1377 mod_timer(&fd_timer, jiffies + 5);
1379 start_check_change_timer();
1380 start_motor_off_timer();
1382 local_irq_save(flags);
1384 local_irq_restore(flags);
1386 DPRINT(("finish_fdc() finished\n"));
1389 /* The detection of disk changes is a dark chapter in Atari history :-(
1390 * Because the "Drive ready" signal isn't present in the Atari
1391 * hardware, one has to rely on the "Write Protect". This works fine,
1392 * as long as no write protected disks are used. TOS solves this
1393 * problem by introducing tri-state logic ("maybe changed") and
1394 * looking at the serial number in block 0. This isn't possible for
1395 * Linux, since the floppy driver can't make assumptions about the
1396 * filesystem used on the disk and thus the contents of block 0. I've
1397 * chosen the method to always say "The disk was changed" if it is
1398 * unsure whether it was. This implies that every open or mount
1399 * invalidates the disk buffers if you work with write protected
1400 * disks. But at least this is better than working with incorrect data
1401 * due to unrecognised disk changes.
1404 static unsigned int floppy_check_events(struct gendisk *disk,
1405 unsigned int clearing)
1407 struct atari_floppy_struct *p = disk->private_data;
1408 unsigned int drive = p - unit;
1409 if (test_bit (drive, &fake_change)) {
1410 /* simulated change (e.g. after formatting) */
1411 return DISK_EVENT_MEDIA_CHANGE;
1413 if (test_bit (drive, &changed_floppies)) {
1414 /* surely changed (the WP signal changed at least once) */
1415 return DISK_EVENT_MEDIA_CHANGE;
1418 /* WP is on -> could be changed: to be sure, buffers should be
1421 return DISK_EVENT_MEDIA_CHANGE;
1427 static int floppy_revalidate(struct gendisk *disk)
1429 struct atari_floppy_struct *p = disk->private_data;
1430 unsigned int drive = p - unit;
1432 if (test_bit(drive, &changed_floppies) ||
1433 test_bit(drive, &fake_change) ||
1435 if (UD.flags & FTD_MSG)
1436 printk(KERN_ERR "floppy: clear format %p!\n", UDT);
1438 clear_bit(drive, &fake_change);
1439 clear_bit(drive, &changed_floppies);
1440 /* MSch: clearing geometry makes sense only for autoprobe
1441 formats, for 'permanent user-defined' parameter:
1442 restore default_params[] here if flagged valid! */
1443 if (default_params[drive].blocks == 0)
1446 UDT = &default_params[drive];
1452 /* This sets up the global variables describing the current request. */
1454 static void setup_req_params( int drive )
1456 int block = ReqBlock + ReqCnt;
1458 ReqTrack = block / UDT->spt;
1459 ReqSector = block - ReqTrack * UDT->spt + 1;
1460 ReqSide = ReqTrack & 1;
1462 ReqData = ReqBuffer + 512 * ReqCnt;
1465 read_track = (ReqCmd == READ && fd_request->error_count == 0);
1469 DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide,
1470 ReqTrack, ReqSector, (unsigned long)ReqData ));
1473 static blk_status_t ataflop_queue_rq(struct blk_mq_hw_ctx *hctx,
1474 const struct blk_mq_queue_data *bd)
1476 struct atari_floppy_struct *floppy = bd->rq->rq_disk->private_data;
1477 int drive = floppy - unit;
1478 int type = floppy->type;
1480 DPRINT(("Queue request: drive %d type %d last %d\n", drive, type, bd->last));
1482 spin_lock_irq(&ataflop_lock);
1484 spin_unlock_irq(&ataflop_lock);
1485 return BLK_STS_DEV_RESOURCE;
1487 if (!stdma_try_lock(floppy_irq, NULL)) {
1488 spin_unlock_irq(&ataflop_lock);
1489 return BLK_STS_RESOURCE;
1491 fd_request = bd->rq;
1492 blk_mq_start_request(fd_request);
1494 atari_disable_irq( IRQ_MFP_FDC );
1498 if (!UD.connected) {
1499 /* drive not connected */
1500 printk(KERN_ERR "Unknown Device: fd%d\n", drive );
1501 fd_end_request_cur(BLK_STS_IOERR);
1508 UDT = atari_disk_type + StartDiskType[DriveType];
1509 set_capacity(floppy->disk, UDT->blocks);
1514 /* user supplied disk type */
1515 if (--type >= NUM_DISK_MINORS) {
1516 printk(KERN_WARNING "fd%d: invalid disk format", drive );
1517 fd_end_request_cur(BLK_STS_IOERR);
1520 if (minor2disktype[type].drive_types > DriveType) {
1521 printk(KERN_WARNING "fd%d: unsupported disk format", drive );
1522 fd_end_request_cur(BLK_STS_IOERR);
1525 type = minor2disktype[type].index;
1526 UDT = &atari_disk_type[type];
1527 set_capacity(floppy->disk, UDT->blocks);
1531 /* stop deselect timer */
1532 del_timer( &motor_off_timer );
1535 ReqCmd = rq_data_dir(fd_request);
1536 ReqBlock = blk_rq_pos(fd_request);
1537 ReqBuffer = bio_data(fd_request->bio);
1538 setup_req_params( drive );
1539 do_fd_action( drive );
1541 atari_enable_irq( IRQ_MFP_FDC );
1544 spin_unlock_irq(&ataflop_lock);
1548 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1549 unsigned int cmd, unsigned long param)
1551 struct gendisk *disk = bdev->bd_disk;
1552 struct atari_floppy_struct *floppy = disk->private_data;
1553 int drive = floppy - unit;
1554 int type = floppy->type;
1555 struct atari_format_descr fmt_desc;
1556 struct atari_disk_type *dtp;
1557 struct floppy_struct getprm;
1559 struct floppy_struct setprm;
1560 void __user *argp = (void __user *)param;
1565 if (--type >= NUM_DISK_MINORS)
1567 if (minor2disktype[type].drive_types > DriveType)
1569 type = minor2disktype[type].index;
1570 dtp = &atari_disk_type[type];
1571 if (UD.flags & FTD_MSG)
1572 printk (KERN_ERR "floppy%d: found dtp %p name %s!\n",
1573 drive, dtp, dtp->name);
1581 memset((void *)&getprm, 0, sizeof(getprm));
1582 getprm.size = dtp->blocks;
1583 getprm.sect = dtp->spt;
1585 getprm.track = dtp->blocks/dtp->spt/2;
1586 getprm.stretch = dtp->stretch;
1587 if (copy_to_user(argp, &getprm, sizeof(getprm)))
1595 * MSch 7/96: simple 'set geometry' case: just set the
1596 * 'default' device params (minor == 0).
1597 * Currently, the drive geometry is cleared after each
1598 * disk change and subsequent revalidate()! simple
1599 * implementation of FDDEFPRM: save geometry from a
1600 * FDDEFPRM call and restore it in floppy_revalidate() !
1603 /* get the parameters from user space */
1604 if (floppy->ref != 1 && floppy->ref != -1)
1606 if (copy_from_user(&setprm, argp, sizeof(setprm)))
1609 * first of all: check for floppy change and revalidate,
1610 * or the next access will revalidate - and clear UDT :-(
1613 if (floppy_check_events(disk, 0))
1614 floppy_revalidate(disk);
1616 if (UD.flags & FTD_MSG)
1617 printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n",
1618 drive, setprm.size, setprm.sect, setprm.stretch);
1620 /* what if type > 0 here? Overwrite specified entry ? */
1622 /* refuse to re-set a predefined type for now */
1627 * type == 0: first look for a matching entry in the type list,
1628 * and set the UD.disktype field to use the perdefined entry.
1629 * TODO: add user-defined format to head of autoprobe list ?
1630 * Useful to include the user-type for future autodetection!
1633 for (settype = 0; settype < NUM_DISK_MINORS; settype++) {
1635 if (minor2disktype[settype].drive_types > DriveType) {
1636 /* skip this one, invalid for drive ... */
1639 setidx = minor2disktype[settype].index;
1640 dtp = &atari_disk_type[setidx];
1642 /* found matching entry ?? */
1643 if ( dtp->blocks == setprm.size
1644 && dtp->spt == setprm.sect
1645 && dtp->stretch == setprm.stretch ) {
1646 if (UD.flags & FTD_MSG)
1647 printk (KERN_INFO "floppy%d: setting %s %p!\n",
1648 drive, dtp->name, dtp);
1650 set_capacity(floppy->disk, UDT->blocks);
1652 if (cmd == FDDEFPRM) {
1653 /* save settings as permanent default type */
1654 default_params[drive].name = dtp->name;
1655 default_params[drive].spt = dtp->spt;
1656 default_params[drive].blocks = dtp->blocks;
1657 default_params[drive].fdc_speed = dtp->fdc_speed;
1658 default_params[drive].stretch = dtp->stretch;
1666 /* no matching disk type found above - setting user_params */
1668 if (cmd == FDDEFPRM) {
1669 /* set permanent type */
1670 dtp = &default_params[drive];
1672 /* set user type (reset by disk change!) */
1673 dtp = &user_params[drive];
1675 dtp->name = "user format";
1676 dtp->blocks = setprm.size;
1677 dtp->spt = setprm.sect;
1678 if (setprm.sect > 14)
1682 dtp->stretch = setprm.stretch;
1684 if (UD.flags & FTD_MSG)
1685 printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n",
1686 drive, dtp->blocks, dtp->spt, dtp->stretch);
1689 if (setprm.track != dtp->blocks/dtp->spt/2 ||
1694 set_capacity(floppy->disk, UDT->blocks);
1698 UD.flags |= FTD_MSG;
1701 UD.flags &= ~FTD_MSG;
1703 case FDSETEMSGTRESH:
1708 if (floppy->ref != 1 && floppy->ref != -1)
1710 if (copy_from_user(&fmt_desc, argp, sizeof(fmt_desc)))
1712 return do_format(drive, type, &fmt_desc);
1715 /* MSch: invalidate default_params */
1716 default_params[drive].blocks = 0;
1717 set_capacity(floppy->disk, MAX_DISK_SIZE * 2);
1721 /* invalidate the buffer track to force a reread */
1723 set_bit(drive, &fake_change);
1724 check_disk_change(bdev);
1731 static int fd_ioctl(struct block_device *bdev, fmode_t mode,
1732 unsigned int cmd, unsigned long arg)
1736 mutex_lock(&ataflop_mutex);
1737 ret = fd_locked_ioctl(bdev, mode, cmd, arg);
1738 mutex_unlock(&ataflop_mutex);
1743 /* Initialize the 'unit' variable for drive 'drive' */
1745 static void __init fd_probe( int drive )
1750 if (!fd_test_drive_present( drive ))
1755 switch( UserSteprate[drive] ) {
1757 UD.steprate = FDCSTEP_2;
1760 UD.steprate = FDCSTEP_3;
1763 UD.steprate = FDCSTEP_6;
1766 UD.steprate = FDCSTEP_12;
1768 default: /* should be -1 for "not set by user" */
1769 if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA)
1770 UD.steprate = FDCSTEP_3;
1772 UD.steprate = FDCSTEP_6;
1775 MotorOn = 1; /* from probe restore operation! */
1779 /* This function tests the physical presence of a floppy drive (not
1780 * whether a disk is inserted). This is done by issuing a restore
1781 * command, waiting max. 2 seconds (that should be enough to move the
1782 * head across the whole disk) and looking at the state of the "TR00"
1783 * signal. This should now be raised if there is a drive connected
1784 * (and there is no hardware failure :-) Otherwise, the drive is
1788 static int __init fd_test_drive_present( int drive )
1790 unsigned long timeout;
1791 unsigned char status;
1794 if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 );
1795 fd_select_drive( drive );
1797 /* disable interrupt temporarily */
1798 atari_turnoff_irq( IRQ_MFP_FDC );
1799 FDC_WRITE (FDCREG_TRACK, 0xff00);
1800 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 );
1802 timeout = jiffies + 2*HZ+HZ/2;
1803 while (time_before(jiffies, timeout))
1804 if (!(st_mfp.par_dt_reg & 0x20))
1807 status = FDC_READ( FDCREG_STATUS );
1808 ok = (status & FDCSTAT_TR00) != 0;
1810 /* force interrupt to abort restore operation (FDC would try
1811 * about 50 seconds!) */
1812 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
1814 status = FDC_READ( FDCREG_STATUS );
1818 /* dummy seek command to make WP bit accessible */
1819 FDC_WRITE( FDCREG_DATA, 0 );
1820 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK );
1821 while( st_mfp.par_dt_reg & 0x20 )
1823 status = FDC_READ( FDCREG_STATUS );
1826 atari_turnon_irq( IRQ_MFP_FDC );
1831 /* Look how many and which kind of drives are connected. If there are
1832 * floppies, additionally start the disk-change and motor-off timers.
1835 static void __init config_types( void )
1839 /* for probing drives, set the FDC speed to 8 MHz */
1840 if (ATARIHW_PRESENT(FDCSPEED))
1841 dma_wd.fdc_speed = 0;
1843 printk(KERN_INFO "Probing floppy drive(s):\n");
1844 for( drive = 0; drive < FD_MAX_UNITS; drive++ ) {
1847 printk(KERN_INFO "fd%d\n", drive);
1852 if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) {
1853 /* If FDC is still busy from probing, give it another FORCI
1854 * command to abort the operation. If this isn't done, the FDC
1855 * will interrupt later and its IRQ line stays low, because
1856 * the status register isn't read. And this will block any
1857 * interrupts on this IRQ line :-(
1859 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI );
1861 FDC_READ( FDCREG_STATUS );
1866 start_motor_off_timer();
1867 if (cnt == 1) fd_select_drive( 0 );
1868 start_check_change_timer();
1873 * floppy_open check for aliasing (/dev/fd0 can be the same as
1874 * /dev/PS0 etc), and disallows simultaneous access to the same
1875 * drive with different device numbers.
1878 static int floppy_open(struct block_device *bdev, fmode_t mode)
1880 struct atari_floppy_struct *p = bdev->bd_disk->private_data;
1881 int type = MINOR(bdev->bd_dev) >> 2;
1883 DPRINT(("fd_open: type=%d\n",type));
1884 if (p->ref && p->type != type)
1887 if (p->ref == -1 || (p->ref && mode & FMODE_EXCL))
1890 if (mode & FMODE_EXCL)
1897 if (mode & FMODE_NDELAY)
1900 if (mode & (FMODE_READ|FMODE_WRITE)) {
1901 check_disk_change(bdev);
1902 if (mode & FMODE_WRITE) {
1915 static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
1919 mutex_lock(&ataflop_mutex);
1920 ret = floppy_open(bdev, mode);
1921 mutex_unlock(&ataflop_mutex);
1926 static void floppy_release(struct gendisk *disk, fmode_t mode)
1928 struct atari_floppy_struct *p = disk->private_data;
1929 mutex_lock(&ataflop_mutex);
1932 else if (!p->ref--) {
1933 printk(KERN_ERR "floppy_release with fd_ref == 0");
1936 mutex_unlock(&ataflop_mutex);
1939 static const struct block_device_operations floppy_fops = {
1940 .owner = THIS_MODULE,
1941 .open = floppy_unlocked_open,
1942 .release = floppy_release,
1944 .check_events = floppy_check_events,
1945 .revalidate_disk= floppy_revalidate,
1948 static const struct blk_mq_ops ataflop_mq_ops = {
1949 .queue_rq = ataflop_queue_rq,
1952 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
1954 int drive = *part & 3;
1955 int type = *part >> 2;
1956 if (drive >= FD_MAX_UNITS || type > NUM_DISK_MINORS)
1959 return get_disk_and_module(unit[drive].disk);
1962 static int __init atari_floppy_init (void)
1968 /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */
1971 if (register_blkdev(FLOPPY_MAJOR,"fd"))
1974 for (i = 0; i < FD_MAX_UNITS; i++) {
1975 unit[i].disk = alloc_disk(1);
1976 if (!unit[i].disk) {
1981 unit[i].disk->queue = blk_mq_init_sq_queue(&unit[i].tag_set,
1983 BLK_MQ_F_SHOULD_MERGE);
1984 if (IS_ERR(unit[i].disk->queue)) {
1985 put_disk(unit[i].disk);
1986 ret = PTR_ERR(unit[i].disk->queue);
1987 unit[i].disk->queue = NULL;
1992 if (UseTrackbuffer < 0)
1993 /* not set by user -> use default: for now, we turn
1994 track buffering off for all Medusas, though it
1995 could be used with ones that have a counter
1996 card. But the test is too hard :-( */
1997 UseTrackbuffer = !MACH_IS_MEDUSA;
1999 /* initialize variables */
2003 DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop");
2005 printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n");
2009 TrackBuffer = DMABuffer + 512;
2010 PhysDMABuffer = atari_stram_to_phys(DMABuffer);
2011 PhysTrackBuffer = virt_to_phys(TrackBuffer);
2012 BufferDrive = BufferSide = BufferTrack = -1;
2014 for (i = 0; i < FD_MAX_UNITS; i++) {
2017 unit[i].disk->major = FLOPPY_MAJOR;
2018 unit[i].disk->first_minor = i;
2019 sprintf(unit[i].disk->disk_name, "fd%d", i);
2020 unit[i].disk->fops = &floppy_fops;
2021 unit[i].disk->events = DISK_EVENT_MEDIA_CHANGE;
2022 unit[i].disk->private_data = &unit[i];
2023 set_capacity(unit[i].disk, MAX_DISK_SIZE * 2);
2024 add_disk(unit[i].disk);
2027 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
2028 floppy_find, NULL, NULL);
2030 printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n",
2031 DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E',
2032 UseTrackbuffer ? "" : "no ");
2039 struct gendisk *disk = unit[i].disk;
2041 blk_cleanup_queue(disk->queue);
2042 blk_mq_free_tag_set(&unit[i].tag_set);
2043 put_disk(unit[i].disk);
2046 unregister_blkdev(FLOPPY_MAJOR, "fd");
2051 static int __init atari_floppy_setup(char *str)
2053 int ints[3 + FD_MAX_UNITS];
2059 str = get_options(str, 3 + FD_MAX_UNITS, ints);
2062 printk(KERN_ERR "ataflop_setup: no arguments!\n" );
2065 else if (ints[0] > 2+FD_MAX_UNITS) {
2066 printk(KERN_ERR "ataflop_setup: too many arguments\n" );
2069 if (ints[1] < 0 || ints[1] > 2)
2070 printk(KERN_ERR "ataflop_setup: bad drive type\n" );
2072 DriveType = ints[1];
2075 UseTrackbuffer = (ints[2] > 0);
2077 for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) {
2078 if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12)
2079 printk(KERN_ERR "ataflop_setup: bad steprate\n" );
2081 UserSteprate[i-3] = ints[i];
2086 __setup("floppy=", atari_floppy_setup);
2089 static void __exit atari_floppy_exit(void)
2092 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
2093 for (i = 0; i < FD_MAX_UNITS; i++) {
2094 del_gendisk(unit[i].disk);
2095 blk_cleanup_queue(unit[i].disk->queue);
2096 blk_mq_free_tag_set(&unit[i].tag_set);
2097 put_disk(unit[i].disk);
2099 unregister_blkdev(FLOPPY_MAJOR, "fd");
2101 del_timer_sync(&fd_timer);
2102 atari_stram_free( DMABuffer );
2105 module_init(atari_floppy_init)
2106 module_exit(atari_floppy_exit)
2108 MODULE_LICENSE("GPL");