This source file includes following definitions.
- set_swim_mode
- get_swim_mode
- swim_select
- swim_action
- swim_readbit
- swim_drive
- swim_motor
- swim_eject
- swim_head
- swim_step
- swim_track00
- swim_seek
- swim_track
- floppy_eject
- swim_read_sector
- floppy_read_sectors
- swim_queue_rq
- get_floppy_geometry
- setup_medium
- floppy_open
- floppy_unlocked_open
- floppy_release
- floppy_ioctl
- floppy_getgeo
- floppy_check_events
- floppy_revalidate
- floppy_find
- swim_add_floppy
- swim_floppy_init
- swim_probe
- swim_remove
- swim_init
- swim_exit
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15 #include <linux/module.h>
16 #include <linux/fd.h>
17 #include <linux/slab.h>
18 #include <linux/blk-mq.h>
19 #include <linux/mutex.h>
20 #include <linux/hdreg.h>
21 #include <linux/kernel.h>
22 #include <linux/delay.h>
23 #include <linux/platform_device.h>
24
25 #include <asm/mac_via.h>
26
27 #define CARDNAME "swim"
28
29 struct sector_header {
30 unsigned char side;
31 unsigned char track;
32 unsigned char sector;
33 unsigned char size;
34 unsigned char crc0;
35 unsigned char crc1;
36 } __attribute__((packed));
37
38 #define DRIVER_VERSION "Version 0.2 (2008-10-30)"
39
40 #define REG(x) unsigned char x, x ## _pad[0x200 - 1];
41
42 struct swim {
43 REG(write_data)
44 REG(write_mark)
45 REG(write_CRC)
46 REG(write_parameter)
47 REG(write_phase)
48 REG(write_setup)
49 REG(write_mode0)
50 REG(write_mode1)
51
52 REG(read_data)
53 REG(read_mark)
54 REG(read_error)
55 REG(read_parameter)
56 REG(read_phase)
57 REG(read_setup)
58 REG(read_status)
59 REG(read_handshake)
60 } __attribute__((packed));
61
62 #define swim_write(base, reg, v) out_8(&(base)->write_##reg, (v))
63 #define swim_read(base, reg) in_8(&(base)->read_##reg)
64
65
66
67 struct iwm {
68 REG(ph0L)
69 REG(ph0H)
70 REG(ph1L)
71 REG(ph1H)
72 REG(ph2L)
73 REG(ph2H)
74 REG(ph3L)
75 REG(ph3H)
76 REG(mtrOff)
77 REG(mtrOn)
78 REG(intDrive)
79 REG(extDrive)
80 REG(q6L)
81 REG(q6H)
82 REG(q7L)
83 REG(q7H)
84 } __attribute__((packed));
85
86 #define iwm_write(base, reg, v) out_8(&(base)->reg, (v))
87 #define iwm_read(base, reg) in_8(&(base)->reg)
88
89
90
91 #define SEEK_POSITIVE 0x070
92 #define SEEK_NEGATIVE 0x074
93 #define STEP 0x071
94 #define MOTOR_ON 0x072
95 #define MOTOR_OFF 0x076
96 #define INDEX 0x073
97 #define EJECT 0x077
98 #define SETMFM 0x171
99 #define SETGCR 0x175
100
101 #define RELAX 0x033
102 #define LSTRB 0x008
103
104 #define CA_MASK 0x077
105
106
107
108 #define READ_DATA_0 0x074
109 #define ONEMEG_DRIVE 0x075
110 #define SINGLE_SIDED 0x076
111 #define DRIVE_PRESENT 0x077
112 #define DISK_IN 0x170
113 #define WRITE_PROT 0x171
114 #define TRACK_ZERO 0x172
115 #define TACHO 0x173
116 #define READ_DATA_1 0x174
117 #define GCR_MODE 0x175
118 #define SEEK_COMPLETE 0x176
119 #define TWOMEG_MEDIA 0x177
120
121
122
123 #define MARK_BYTE 0x01
124 #define CRC_ZERO 0x02
125 #define RDDATA 0x04
126 #define SENSE 0x08
127 #define MOTEN 0x10
128 #define ERROR 0x20
129 #define DAT2BYTE 0x40
130 #define DAT1BYTE 0x80
131
132
133
134 #define S_INV_WDATA 0x01
135 #define S_3_5_SELECT 0x02
136 #define S_GCR 0x04
137 #define S_FCLK_DIV2 0x08
138 #define S_ERROR_CORR 0x10
139 #define S_IBM_DRIVE 0x20
140 #define S_GCR_WRITE 0x40
141 #define S_TIMEOUT 0x80
142
143
144
145 #define CLFIFO 0x01
146 #define ENBL1 0x02
147 #define ENBL2 0x04
148 #define ACTION 0x08
149 #define WRITE_MODE 0x10
150 #define HEDSEL 0x20
151 #define MOTON 0x80
152
153
154
155 enum drive_location {
156 INTERNAL_DRIVE = 0x02,
157 EXTERNAL_DRIVE = 0x04,
158 };
159
160 enum media_type {
161 DD_MEDIA,
162 HD_MEDIA,
163 };
164
165 struct floppy_state {
166
167
168
169 enum drive_location location;
170 int head_number;
171
172
173
174 int disk_in;
175 int ejected;
176 enum media_type type;
177 int write_protected;
178
179 int total_secs;
180 int secpercyl;
181 int secpertrack;
182
183
184
185 int track;
186 int ref_count;
187
188 struct gendisk *disk;
189 struct blk_mq_tag_set tag_set;
190
191
192
193 struct swim_priv *swd;
194 };
195
196 enum motor_action {
197 OFF,
198 ON,
199 };
200
201 enum head {
202 LOWER_HEAD = 0,
203 UPPER_HEAD = 1,
204 };
205
206 #define FD_MAX_UNIT 2
207
208 struct swim_priv {
209 struct swim __iomem *base;
210 spinlock_t lock;
211 int floppy_count;
212 struct floppy_state unit[FD_MAX_UNIT];
213 };
214
215 extern int swim_read_sector_header(struct swim __iomem *base,
216 struct sector_header *header);
217 extern int swim_read_sector_data(struct swim __iomem *base,
218 unsigned char *data);
219
220 static DEFINE_MUTEX(swim_mutex);
221 static inline void set_swim_mode(struct swim __iomem *base, int enable)
222 {
223 struct iwm __iomem *iwm_base;
224 unsigned long flags;
225
226 if (!enable) {
227 swim_write(base, mode0, 0xf8);
228 return;
229 }
230
231 iwm_base = (struct iwm __iomem *)base;
232 local_irq_save(flags);
233
234 iwm_read(iwm_base, q7L);
235 iwm_read(iwm_base, mtrOff);
236 iwm_read(iwm_base, q6H);
237
238 iwm_write(iwm_base, q7H, 0x57);
239 iwm_write(iwm_base, q7H, 0x17);
240 iwm_write(iwm_base, q7H, 0x57);
241 iwm_write(iwm_base, q7H, 0x57);
242
243 local_irq_restore(flags);
244 }
245
246 static inline int get_swim_mode(struct swim __iomem *base)
247 {
248 unsigned long flags;
249
250 local_irq_save(flags);
251
252 swim_write(base, phase, 0xf5);
253 if (swim_read(base, phase) != 0xf5)
254 goto is_iwm;
255 swim_write(base, phase, 0xf6);
256 if (swim_read(base, phase) != 0xf6)
257 goto is_iwm;
258 swim_write(base, phase, 0xf7);
259 if (swim_read(base, phase) != 0xf7)
260 goto is_iwm;
261 local_irq_restore(flags);
262 return 1;
263 is_iwm:
264 local_irq_restore(flags);
265 return 0;
266 }
267
268 static inline void swim_select(struct swim __iomem *base, int sel)
269 {
270 swim_write(base, phase, RELAX);
271
272 via1_set_head(sel & 0x100);
273
274 swim_write(base, phase, sel & CA_MASK);
275 }
276
277 static inline void swim_action(struct swim __iomem *base, int action)
278 {
279 unsigned long flags;
280
281 local_irq_save(flags);
282
283 swim_select(base, action);
284 udelay(1);
285 swim_write(base, phase, (LSTRB<<4) | LSTRB);
286 udelay(1);
287 swim_write(base, phase, (LSTRB<<4) | ((~LSTRB) & 0x0F));
288 udelay(1);
289
290 local_irq_restore(flags);
291 }
292
293 static inline int swim_readbit(struct swim __iomem *base, int bit)
294 {
295 int stat;
296
297 swim_select(base, bit);
298
299 udelay(10);
300
301 stat = swim_read(base, handshake);
302
303 return (stat & SENSE) == 0;
304 }
305
306 static inline void swim_drive(struct swim __iomem *base,
307 enum drive_location location)
308 {
309 if (location == INTERNAL_DRIVE) {
310 swim_write(base, mode0, EXTERNAL_DRIVE);
311 swim_write(base, mode1, INTERNAL_DRIVE);
312 } else if (location == EXTERNAL_DRIVE) {
313 swim_write(base, mode0, INTERNAL_DRIVE);
314 swim_write(base, mode1, EXTERNAL_DRIVE);
315 }
316 }
317
318 static inline void swim_motor(struct swim __iomem *base,
319 enum motor_action action)
320 {
321 if (action == ON) {
322 int i;
323
324 swim_action(base, MOTOR_ON);
325
326 for (i = 0; i < 2*HZ; i++) {
327 swim_select(base, RELAX);
328 if (swim_readbit(base, MOTOR_ON))
329 break;
330 current->state = TASK_INTERRUPTIBLE;
331 schedule_timeout(1);
332 }
333 } else if (action == OFF) {
334 swim_action(base, MOTOR_OFF);
335 swim_select(base, RELAX);
336 }
337 }
338
339 static inline void swim_eject(struct swim __iomem *base)
340 {
341 int i;
342
343 swim_action(base, EJECT);
344
345 for (i = 0; i < 2*HZ; i++) {
346 swim_select(base, RELAX);
347 if (!swim_readbit(base, DISK_IN))
348 break;
349 current->state = TASK_INTERRUPTIBLE;
350 schedule_timeout(1);
351 }
352 swim_select(base, RELAX);
353 }
354
355 static inline void swim_head(struct swim __iomem *base, enum head head)
356 {
357
358
359 if (head == UPPER_HEAD)
360 swim_select(base, READ_DATA_1);
361 else if (head == LOWER_HEAD)
362 swim_select(base, READ_DATA_0);
363 }
364
365 static inline int swim_step(struct swim __iomem *base)
366 {
367 int wait;
368
369 swim_action(base, STEP);
370
371 for (wait = 0; wait < HZ; wait++) {
372
373 current->state = TASK_INTERRUPTIBLE;
374 schedule_timeout(1);
375
376 swim_select(base, RELAX);
377 if (!swim_readbit(base, STEP))
378 return 0;
379 }
380 return -1;
381 }
382
383 static inline int swim_track00(struct swim __iomem *base)
384 {
385 int try;
386
387 swim_action(base, SEEK_NEGATIVE);
388
389 for (try = 0; try < 100; try++) {
390
391 swim_select(base, RELAX);
392 if (swim_readbit(base, TRACK_ZERO))
393 break;
394
395 if (swim_step(base))
396 return -1;
397 }
398
399 if (swim_readbit(base, TRACK_ZERO))
400 return 0;
401
402 return -1;
403 }
404
405 static inline int swim_seek(struct swim __iomem *base, int step)
406 {
407 if (step == 0)
408 return 0;
409
410 if (step < 0) {
411 swim_action(base, SEEK_NEGATIVE);
412 step = -step;
413 } else
414 swim_action(base, SEEK_POSITIVE);
415
416 for ( ; step > 0; step--) {
417 if (swim_step(base))
418 return -1;
419 }
420
421 return 0;
422 }
423
424 static inline int swim_track(struct floppy_state *fs, int track)
425 {
426 struct swim __iomem *base = fs->swd->base;
427 int ret;
428
429 ret = swim_seek(base, track - fs->track);
430
431 if (ret == 0)
432 fs->track = track;
433 else {
434 swim_track00(base);
435 fs->track = 0;
436 }
437
438 return ret;
439 }
440
441 static int floppy_eject(struct floppy_state *fs)
442 {
443 struct swim __iomem *base = fs->swd->base;
444
445 swim_drive(base, fs->location);
446 swim_motor(base, OFF);
447 swim_eject(base);
448
449 fs->disk_in = 0;
450 fs->ejected = 1;
451
452 return 0;
453 }
454
455 static inline int swim_read_sector(struct floppy_state *fs,
456 int side, int track,
457 int sector, unsigned char *buffer)
458 {
459 struct swim __iomem *base = fs->swd->base;
460 unsigned long flags;
461 struct sector_header header;
462 int ret = -1;
463 short i;
464
465 swim_track(fs, track);
466
467 swim_write(base, mode1, MOTON);
468 swim_head(base, side);
469 swim_write(base, mode0, side);
470
471 local_irq_save(flags);
472 for (i = 0; i < 36; i++) {
473 ret = swim_read_sector_header(base, &header);
474 if (!ret && (header.sector == sector)) {
475
476
477 ret = swim_read_sector_data(base, buffer);
478 break;
479 }
480 }
481 local_irq_restore(flags);
482
483 swim_write(base, mode0, MOTON);
484
485 if ((header.side != side) || (header.track != track) ||
486 (header.sector != sector))
487 return 0;
488
489 return ret;
490 }
491
492 static blk_status_t floppy_read_sectors(struct floppy_state *fs,
493 int req_sector, int sectors_nb,
494 unsigned char *buffer)
495 {
496 struct swim __iomem *base = fs->swd->base;
497 int ret;
498 int side, track, sector;
499 int i, try;
500
501
502 swim_drive(base, fs->location);
503 for (i = req_sector; i < req_sector + sectors_nb; i++) {
504 int x;
505 track = i / fs->secpercyl;
506 x = i % fs->secpercyl;
507 side = x / fs->secpertrack;
508 sector = x % fs->secpertrack + 1;
509
510 try = 5;
511 do {
512 ret = swim_read_sector(fs, side, track, sector,
513 buffer);
514 if (try-- == 0)
515 return BLK_STS_IOERR;
516 } while (ret != 512);
517
518 buffer += ret;
519 }
520
521 return 0;
522 }
523
524 static blk_status_t swim_queue_rq(struct blk_mq_hw_ctx *hctx,
525 const struct blk_mq_queue_data *bd)
526 {
527 struct floppy_state *fs = hctx->queue->queuedata;
528 struct swim_priv *swd = fs->swd;
529 struct request *req = bd->rq;
530 blk_status_t err;
531
532 if (!spin_trylock_irq(&swd->lock))
533 return BLK_STS_DEV_RESOURCE;
534
535 blk_mq_start_request(req);
536
537 if (!fs->disk_in || rq_data_dir(req) == WRITE) {
538 err = BLK_STS_IOERR;
539 goto out;
540 }
541
542 do {
543 err = floppy_read_sectors(fs, blk_rq_pos(req),
544 blk_rq_cur_sectors(req),
545 bio_data(req->bio));
546 } while (blk_update_request(req, err, blk_rq_cur_bytes(req)));
547 __blk_mq_end_request(req, err);
548
549 err = BLK_STS_OK;
550 out:
551 spin_unlock_irq(&swd->lock);
552 return err;
553
554 }
555
556 static struct floppy_struct floppy_type[4] = {
557 { 0, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, NULL },
558 { 720, 9, 1, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL },
559 { 1440, 9, 2, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL },
560 { 2880, 18, 2, 80, 0, 0x1B, 0x00, 0xCF, 0x6C, NULL },
561 };
562
563 static int get_floppy_geometry(struct floppy_state *fs, int type,
564 struct floppy_struct **g)
565 {
566 if (type >= ARRAY_SIZE(floppy_type))
567 return -EINVAL;
568
569 if (type)
570 *g = &floppy_type[type];
571 else if (fs->type == HD_MEDIA)
572 *g = &floppy_type[3];
573 else if (fs->head_number == 2)
574 *g = &floppy_type[2];
575 else
576 *g = &floppy_type[1];
577
578 return 0;
579 }
580
581 static void setup_medium(struct floppy_state *fs)
582 {
583 struct swim __iomem *base = fs->swd->base;
584
585 if (swim_readbit(base, DISK_IN)) {
586 struct floppy_struct *g;
587 fs->disk_in = 1;
588 fs->write_protected = swim_readbit(base, WRITE_PROT);
589
590 if (swim_track00(base))
591 printk(KERN_ERR
592 "SWIM: cannot move floppy head to track 0\n");
593
594 swim_track00(base);
595
596 fs->type = swim_readbit(base, TWOMEG_MEDIA) ?
597 HD_MEDIA : DD_MEDIA;
598 fs->head_number = swim_readbit(base, SINGLE_SIDED) ? 1 : 2;
599 get_floppy_geometry(fs, 0, &g);
600 fs->total_secs = g->size;
601 fs->secpercyl = g->head * g->sect;
602 fs->secpertrack = g->sect;
603 fs->track = 0;
604 } else {
605 fs->disk_in = 0;
606 }
607 }
608
609 static int floppy_open(struct block_device *bdev, fmode_t mode)
610 {
611 struct floppy_state *fs = bdev->bd_disk->private_data;
612 struct swim __iomem *base = fs->swd->base;
613 int err;
614
615 if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL))
616 return -EBUSY;
617
618 if (mode & FMODE_EXCL)
619 fs->ref_count = -1;
620 else
621 fs->ref_count++;
622
623 swim_write(base, setup, S_IBM_DRIVE | S_FCLK_DIV2);
624 udelay(10);
625 swim_drive(base, fs->location);
626 swim_motor(base, ON);
627 swim_action(base, SETMFM);
628 if (fs->ejected)
629 setup_medium(fs);
630 if (!fs->disk_in) {
631 err = -ENXIO;
632 goto out;
633 }
634
635 set_capacity(fs->disk, fs->total_secs);
636
637 if (mode & FMODE_NDELAY)
638 return 0;
639
640 if (mode & (FMODE_READ|FMODE_WRITE)) {
641 check_disk_change(bdev);
642 if ((mode & FMODE_WRITE) && fs->write_protected) {
643 err = -EROFS;
644 goto out;
645 }
646 }
647 return 0;
648 out:
649 if (fs->ref_count < 0)
650 fs->ref_count = 0;
651 else if (fs->ref_count > 0)
652 --fs->ref_count;
653
654 if (fs->ref_count == 0)
655 swim_motor(base, OFF);
656 return err;
657 }
658
659 static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
660 {
661 int ret;
662
663 mutex_lock(&swim_mutex);
664 ret = floppy_open(bdev, mode);
665 mutex_unlock(&swim_mutex);
666
667 return ret;
668 }
669
670 static void floppy_release(struct gendisk *disk, fmode_t mode)
671 {
672 struct floppy_state *fs = disk->private_data;
673 struct swim __iomem *base = fs->swd->base;
674
675 mutex_lock(&swim_mutex);
676 if (fs->ref_count < 0)
677 fs->ref_count = 0;
678 else if (fs->ref_count > 0)
679 --fs->ref_count;
680
681 if (fs->ref_count == 0)
682 swim_motor(base, OFF);
683 mutex_unlock(&swim_mutex);
684 }
685
686 static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
687 unsigned int cmd, unsigned long param)
688 {
689 struct floppy_state *fs = bdev->bd_disk->private_data;
690 int err;
691
692 if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))
693 return -EPERM;
694
695 switch (cmd) {
696 case FDEJECT:
697 if (fs->ref_count != 1)
698 return -EBUSY;
699 mutex_lock(&swim_mutex);
700 err = floppy_eject(fs);
701 mutex_unlock(&swim_mutex);
702 return err;
703
704 case FDGETPRM:
705 if (copy_to_user((void __user *) param, (void *) &floppy_type,
706 sizeof(struct floppy_struct)))
707 return -EFAULT;
708 return 0;
709 }
710 return -ENOTTY;
711 }
712
713 static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
714 {
715 struct floppy_state *fs = bdev->bd_disk->private_data;
716 struct floppy_struct *g;
717 int ret;
718
719 ret = get_floppy_geometry(fs, 0, &g);
720 if (ret)
721 return ret;
722
723 geo->heads = g->head;
724 geo->sectors = g->sect;
725 geo->cylinders = g->track;
726
727 return 0;
728 }
729
730 static unsigned int floppy_check_events(struct gendisk *disk,
731 unsigned int clearing)
732 {
733 struct floppy_state *fs = disk->private_data;
734
735 return fs->ejected ? DISK_EVENT_MEDIA_CHANGE : 0;
736 }
737
738 static int floppy_revalidate(struct gendisk *disk)
739 {
740 struct floppy_state *fs = disk->private_data;
741 struct swim __iomem *base = fs->swd->base;
742
743 swim_drive(base, fs->location);
744
745 if (fs->ejected)
746 setup_medium(fs);
747
748 if (!fs->disk_in)
749 swim_motor(base, OFF);
750 else
751 fs->ejected = 0;
752
753 return !fs->disk_in;
754 }
755
756 static const struct block_device_operations floppy_fops = {
757 .owner = THIS_MODULE,
758 .open = floppy_unlocked_open,
759 .release = floppy_release,
760 .ioctl = floppy_ioctl,
761 .getgeo = floppy_getgeo,
762 .check_events = floppy_check_events,
763 .revalidate_disk = floppy_revalidate,
764 };
765
766 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
767 {
768 struct swim_priv *swd = data;
769 int drive = (*part & 3);
770
771 if (drive >= swd->floppy_count)
772 return NULL;
773
774 *part = 0;
775 return get_disk_and_module(swd->unit[drive].disk);
776 }
777
778 static int swim_add_floppy(struct swim_priv *swd, enum drive_location location)
779 {
780 struct floppy_state *fs = &swd->unit[swd->floppy_count];
781 struct swim __iomem *base = swd->base;
782
783 fs->location = location;
784
785 swim_drive(base, location);
786
787 swim_motor(base, OFF);
788
789 fs->type = HD_MEDIA;
790 fs->head_number = 2;
791
792 fs->ref_count = 0;
793 fs->ejected = 1;
794
795 swd->floppy_count++;
796
797 return 0;
798 }
799
800 static const struct blk_mq_ops swim_mq_ops = {
801 .queue_rq = swim_queue_rq,
802 };
803
804 static int swim_floppy_init(struct swim_priv *swd)
805 {
806 int err;
807 int drive;
808 struct swim __iomem *base = swd->base;
809
810
811
812 swim_drive(base, INTERNAL_DRIVE);
813 if (swim_readbit(base, DRIVE_PRESENT) &&
814 !swim_readbit(base, ONEMEG_DRIVE))
815 swim_add_floppy(swd, INTERNAL_DRIVE);
816 swim_drive(base, EXTERNAL_DRIVE);
817 if (swim_readbit(base, DRIVE_PRESENT) &&
818 !swim_readbit(base, ONEMEG_DRIVE))
819 swim_add_floppy(swd, EXTERNAL_DRIVE);
820
821
822
823 err = register_blkdev(FLOPPY_MAJOR, "fd");
824 if (err) {
825 printk(KERN_ERR "Unable to get major %d for SWIM floppy\n",
826 FLOPPY_MAJOR);
827 return -EBUSY;
828 }
829
830 spin_lock_init(&swd->lock);
831
832 for (drive = 0; drive < swd->floppy_count; drive++) {
833 struct request_queue *q;
834
835 swd->unit[drive].disk = alloc_disk(1);
836 if (swd->unit[drive].disk == NULL) {
837 err = -ENOMEM;
838 goto exit_put_disks;
839 }
840
841 q = blk_mq_init_sq_queue(&swd->unit[drive].tag_set, &swim_mq_ops,
842 2, BLK_MQ_F_SHOULD_MERGE);
843 if (IS_ERR(q)) {
844 err = PTR_ERR(q);
845 goto exit_put_disks;
846 }
847
848 swd->unit[drive].disk->queue = q;
849 blk_queue_bounce_limit(swd->unit[drive].disk->queue,
850 BLK_BOUNCE_HIGH);
851 swd->unit[drive].disk->queue->queuedata = &swd->unit[drive];
852 swd->unit[drive].swd = swd;
853 }
854
855 for (drive = 0; drive < swd->floppy_count; drive++) {
856 swd->unit[drive].disk->flags = GENHD_FL_REMOVABLE;
857 swd->unit[drive].disk->major = FLOPPY_MAJOR;
858 swd->unit[drive].disk->first_minor = drive;
859 sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive);
860 swd->unit[drive].disk->fops = &floppy_fops;
861 swd->unit[drive].disk->events = DISK_EVENT_MEDIA_CHANGE;
862 swd->unit[drive].disk->private_data = &swd->unit[drive];
863 set_capacity(swd->unit[drive].disk, 2880);
864 add_disk(swd->unit[drive].disk);
865 }
866
867 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
868 floppy_find, NULL, swd);
869
870 return 0;
871
872 exit_put_disks:
873 unregister_blkdev(FLOPPY_MAJOR, "fd");
874 do {
875 struct gendisk *disk = swd->unit[drive].disk;
876
877 if (disk) {
878 if (disk->queue) {
879 blk_cleanup_queue(disk->queue);
880 disk->queue = NULL;
881 }
882 blk_mq_free_tag_set(&swd->unit[drive].tag_set);
883 put_disk(disk);
884 }
885 } while (drive--);
886 return err;
887 }
888
889 static int swim_probe(struct platform_device *dev)
890 {
891 struct resource *res;
892 struct swim __iomem *swim_base;
893 struct swim_priv *swd;
894 int ret;
895
896 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
897 if (!res) {
898 ret = -ENODEV;
899 goto out;
900 }
901
902 if (!request_mem_region(res->start, resource_size(res), CARDNAME)) {
903 ret = -EBUSY;
904 goto out;
905 }
906
907 swim_base = (struct swim __iomem *)res->start;
908 if (!swim_base) {
909 ret = -ENOMEM;
910 goto out_release_io;
911 }
912
913
914
915 set_swim_mode(swim_base, 1);
916 if (!get_swim_mode(swim_base)) {
917 printk(KERN_INFO "SWIM device not found !\n");
918 ret = -ENODEV;
919 goto out_release_io;
920 }
921
922
923
924 swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL);
925 if (!swd) {
926 ret = -ENOMEM;
927 goto out_release_io;
928 }
929 platform_set_drvdata(dev, swd);
930
931 swd->base = swim_base;
932
933 ret = swim_floppy_init(swd);
934 if (ret)
935 goto out_kfree;
936
937 return 0;
938
939 out_kfree:
940 kfree(swd);
941 out_release_io:
942 release_mem_region(res->start, resource_size(res));
943 out:
944 return ret;
945 }
946
947 static int swim_remove(struct platform_device *dev)
948 {
949 struct swim_priv *swd = platform_get_drvdata(dev);
950 int drive;
951 struct resource *res;
952
953 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
954
955 for (drive = 0; drive < swd->floppy_count; drive++) {
956 del_gendisk(swd->unit[drive].disk);
957 blk_cleanup_queue(swd->unit[drive].disk->queue);
958 blk_mq_free_tag_set(&swd->unit[drive].tag_set);
959 put_disk(swd->unit[drive].disk);
960 }
961
962 unregister_blkdev(FLOPPY_MAJOR, "fd");
963
964
965
966 for (drive = 0; drive < swd->floppy_count; drive++)
967 floppy_eject(&swd->unit[drive]);
968
969 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
970 if (res)
971 release_mem_region(res->start, resource_size(res));
972
973 kfree(swd);
974
975 return 0;
976 }
977
978 static struct platform_driver swim_driver = {
979 .probe = swim_probe,
980 .remove = swim_remove,
981 .driver = {
982 .name = CARDNAME,
983 },
984 };
985
986 static int __init swim_init(void)
987 {
988 printk(KERN_INFO "SWIM floppy driver %s\n", DRIVER_VERSION);
989
990 return platform_driver_register(&swim_driver);
991 }
992 module_init(swim_init);
993
994 static void __exit swim_exit(void)
995 {
996 platform_driver_unregister(&swim_driver);
997 }
998 module_exit(swim_exit);
999
1000 MODULE_DESCRIPTION("Driver for SWIM floppy controller");
1001 MODULE_LICENSE("GPL");
1002 MODULE_AUTHOR("Laurent Vivier <laurent@lvivier.info>");
1003 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);