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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
29struct 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
42struct 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
67struct 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
155enum drive_location {
156 INTERNAL_DRIVE = 0x02,
157 EXTERNAL_DRIVE = 0x04,
158};
159
160enum media_type {
161 DD_MEDIA,
162 HD_MEDIA,
163};
164
165struct 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
196enum motor_action {
197 OFF,
198 ON,
199};
200
201enum head {
202 LOWER_HEAD = 0,
203 UPPER_HEAD = 1,
204};
205
206#define FD_MAX_UNIT 2
207
208struct 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
215extern int swim_read_sector_header(struct swim __iomem *base,
216 struct sector_header *header);
217extern int swim_read_sector_data(struct swim __iomem *base,
218 unsigned char *data);
219
220static DEFINE_MUTEX(swim_mutex);
221static 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
246static 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;
263is_iwm:
264 local_irq_restore(flags);
265 return 0;
266}
267
268static 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
277static 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
293static 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
306static 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
318static 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 set_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
339static 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 set_current_state(TASK_INTERRUPTIBLE);
350 schedule_timeout(1);
351 }
352 swim_select(base, RELAX);
353}
354
355static 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
365static 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 set_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
383static 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
405static 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
424static 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
441static 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
455static 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
492static 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
524static 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;
550out:
551 spin_unlock_irq(&swd->lock);
552 return err;
553
554}
555
556static 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
563static 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
581static 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
609static 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 if (bdev_check_media_change(bdev) && fs->disk_in)
642 fs->ejected = 0;
643 if ((mode & FMODE_WRITE) && fs->write_protected) {
644 err = -EROFS;
645 goto out;
646 }
647 }
648 return 0;
649out:
650 if (fs->ref_count < 0)
651 fs->ref_count = 0;
652 else if (fs->ref_count > 0)
653 --fs->ref_count;
654
655 if (fs->ref_count == 0)
656 swim_motor(base, OFF);
657 return err;
658}
659
660static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
661{
662 int ret;
663
664 mutex_lock(&swim_mutex);
665 ret = floppy_open(bdev, mode);
666 mutex_unlock(&swim_mutex);
667
668 return ret;
669}
670
671static void floppy_release(struct gendisk *disk, fmode_t mode)
672{
673 struct floppy_state *fs = disk->private_data;
674 struct swim __iomem *base = fs->swd->base;
675
676 mutex_lock(&swim_mutex);
677 if (fs->ref_count < 0)
678 fs->ref_count = 0;
679 else if (fs->ref_count > 0)
680 --fs->ref_count;
681
682 if (fs->ref_count == 0)
683 swim_motor(base, OFF);
684 mutex_unlock(&swim_mutex);
685}
686
687static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
688 unsigned int cmd, unsigned long param)
689{
690 struct floppy_state *fs = bdev->bd_disk->private_data;
691 int err;
692
693 if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))
694 return -EPERM;
695
696 switch (cmd) {
697 case FDEJECT:
698 if (fs->ref_count != 1)
699 return -EBUSY;
700 mutex_lock(&swim_mutex);
701 err = floppy_eject(fs);
702 mutex_unlock(&swim_mutex);
703 return err;
704
705 case FDGETPRM:
706 if (copy_to_user((void __user *) param, (void *) &floppy_type,
707 sizeof(struct floppy_struct)))
708 return -EFAULT;
709 return 0;
710 }
711 return -ENOTTY;
712}
713
714static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
715{
716 struct floppy_state *fs = bdev->bd_disk->private_data;
717 struct floppy_struct *g;
718 int ret;
719
720 ret = get_floppy_geometry(fs, 0, &g);
721 if (ret)
722 return ret;
723
724 geo->heads = g->head;
725 geo->sectors = g->sect;
726 geo->cylinders = g->track;
727
728 return 0;
729}
730
731static unsigned int floppy_check_events(struct gendisk *disk,
732 unsigned int clearing)
733{
734 struct floppy_state *fs = disk->private_data;
735
736 return fs->ejected ? DISK_EVENT_MEDIA_CHANGE : 0;
737}
738
739static const struct block_device_operations floppy_fops = {
740 .owner = THIS_MODULE,
741 .open = floppy_unlocked_open,
742 .release = floppy_release,
743 .ioctl = floppy_ioctl,
744 .getgeo = floppy_getgeo,
745 .check_events = floppy_check_events,
746};
747
748static struct kobject *floppy_find(dev_t dev, int *part, void *data)
749{
750 struct swim_priv *swd = data;
751 int drive = (*part & 3);
752
753 if (drive >= swd->floppy_count)
754 return NULL;
755
756 *part = 0;
757 return get_disk_and_module(swd->unit[drive].disk);
758}
759
760static int swim_add_floppy(struct swim_priv *swd, enum drive_location location)
761{
762 struct floppy_state *fs = &swd->unit[swd->floppy_count];
763 struct swim __iomem *base = swd->base;
764
765 fs->location = location;
766
767 swim_drive(base, location);
768
769 swim_motor(base, OFF);
770
771 fs->type = HD_MEDIA;
772 fs->head_number = 2;
773
774 fs->ref_count = 0;
775 fs->ejected = 1;
776
777 swd->floppy_count++;
778
779 return 0;
780}
781
782static const struct blk_mq_ops swim_mq_ops = {
783 .queue_rq = swim_queue_rq,
784};
785
786static int swim_floppy_init(struct swim_priv *swd)
787{
788 int err;
789 int drive;
790 struct swim __iomem *base = swd->base;
791
792
793
794 swim_drive(base, INTERNAL_DRIVE);
795 if (swim_readbit(base, DRIVE_PRESENT) &&
796 !swim_readbit(base, ONEMEG_DRIVE))
797 swim_add_floppy(swd, INTERNAL_DRIVE);
798 swim_drive(base, EXTERNAL_DRIVE);
799 if (swim_readbit(base, DRIVE_PRESENT) &&
800 !swim_readbit(base, ONEMEG_DRIVE))
801 swim_add_floppy(swd, EXTERNAL_DRIVE);
802
803
804
805 err = register_blkdev(FLOPPY_MAJOR, "fd");
806 if (err) {
807 printk(KERN_ERR "Unable to get major %d for SWIM floppy\n",
808 FLOPPY_MAJOR);
809 return -EBUSY;
810 }
811
812 spin_lock_init(&swd->lock);
813
814 for (drive = 0; drive < swd->floppy_count; drive++) {
815 struct request_queue *q;
816
817 swd->unit[drive].disk = alloc_disk(1);
818 if (swd->unit[drive].disk == NULL) {
819 err = -ENOMEM;
820 goto exit_put_disks;
821 }
822
823 q = blk_mq_init_sq_queue(&swd->unit[drive].tag_set, &swim_mq_ops,
824 2, BLK_MQ_F_SHOULD_MERGE);
825 if (IS_ERR(q)) {
826 err = PTR_ERR(q);
827 goto exit_put_disks;
828 }
829
830 swd->unit[drive].disk->queue = q;
831 blk_queue_bounce_limit(swd->unit[drive].disk->queue,
832 BLK_BOUNCE_HIGH);
833 swd->unit[drive].disk->queue->queuedata = &swd->unit[drive];
834 swd->unit[drive].swd = swd;
835 }
836
837 for (drive = 0; drive < swd->floppy_count; drive++) {
838 swd->unit[drive].disk->flags = GENHD_FL_REMOVABLE;
839 swd->unit[drive].disk->major = FLOPPY_MAJOR;
840 swd->unit[drive].disk->first_minor = drive;
841 sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive);
842 swd->unit[drive].disk->fops = &floppy_fops;
843 swd->unit[drive].disk->events = DISK_EVENT_MEDIA_CHANGE;
844 swd->unit[drive].disk->private_data = &swd->unit[drive];
845 set_capacity(swd->unit[drive].disk, 2880);
846 add_disk(swd->unit[drive].disk);
847 }
848
849 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
850 floppy_find, NULL, swd);
851
852 return 0;
853
854exit_put_disks:
855 unregister_blkdev(FLOPPY_MAJOR, "fd");
856 do {
857 struct gendisk *disk = swd->unit[drive].disk;
858
859 if (disk) {
860 if (disk->queue) {
861 blk_cleanup_queue(disk->queue);
862 disk->queue = NULL;
863 }
864 blk_mq_free_tag_set(&swd->unit[drive].tag_set);
865 put_disk(disk);
866 }
867 } while (drive--);
868 return err;
869}
870
871static int swim_probe(struct platform_device *dev)
872{
873 struct resource *res;
874 struct swim __iomem *swim_base;
875 struct swim_priv *swd;
876 int ret;
877
878 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
879 if (!res) {
880 ret = -ENODEV;
881 goto out;
882 }
883
884 if (!request_mem_region(res->start, resource_size(res), CARDNAME)) {
885 ret = -EBUSY;
886 goto out;
887 }
888
889 swim_base = (struct swim __iomem *)res->start;
890 if (!swim_base) {
891 ret = -ENOMEM;
892 goto out_release_io;
893 }
894
895
896
897 set_swim_mode(swim_base, 1);
898 if (!get_swim_mode(swim_base)) {
899 printk(KERN_INFO "SWIM device not found !\n");
900 ret = -ENODEV;
901 goto out_release_io;
902 }
903
904
905
906 swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL);
907 if (!swd) {
908 ret = -ENOMEM;
909 goto out_release_io;
910 }
911 platform_set_drvdata(dev, swd);
912
913 swd->base = swim_base;
914
915 ret = swim_floppy_init(swd);
916 if (ret)
917 goto out_kfree;
918
919 return 0;
920
921out_kfree:
922 kfree(swd);
923out_release_io:
924 release_mem_region(res->start, resource_size(res));
925out:
926 return ret;
927}
928
929static int swim_remove(struct platform_device *dev)
930{
931 struct swim_priv *swd = platform_get_drvdata(dev);
932 int drive;
933 struct resource *res;
934
935 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
936
937 for (drive = 0; drive < swd->floppy_count; drive++) {
938 del_gendisk(swd->unit[drive].disk);
939 blk_cleanup_queue(swd->unit[drive].disk->queue);
940 blk_mq_free_tag_set(&swd->unit[drive].tag_set);
941 put_disk(swd->unit[drive].disk);
942 }
943
944 unregister_blkdev(FLOPPY_MAJOR, "fd");
945
946
947
948 for (drive = 0; drive < swd->floppy_count; drive++)
949 floppy_eject(&swd->unit[drive]);
950
951 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
952 if (res)
953 release_mem_region(res->start, resource_size(res));
954
955 kfree(swd);
956
957 return 0;
958}
959
960static struct platform_driver swim_driver = {
961 .probe = swim_probe,
962 .remove = swim_remove,
963 .driver = {
964 .name = CARDNAME,
965 },
966};
967
968static int __init swim_init(void)
969{
970 printk(KERN_INFO "SWIM floppy driver %s\n", DRIVER_VERSION);
971
972 return platform_driver_register(&swim_driver);
973}
974module_init(swim_init);
975
976static void __exit swim_exit(void)
977{
978 platform_driver_unregister(&swim_driver);
979}
980module_exit(swim_exit);
981
982MODULE_DESCRIPTION("Driver for SWIM floppy controller");
983MODULE_LICENSE("GPL");
984MODULE_AUTHOR("Laurent Vivier <laurent@lvivier.info>");
985MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);
986
