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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-2.6-block.git] / drivers / block / swim.c
CommitLineData
8852ecd9
LV		 1/*
2 * Driver for SWIM (Sander Woz Integrated Machine) floppy controller
3 *
4 * Copyright (C) 2004,2008 Laurent Vivier <Laurent@lvivier.info>
5 *
6 * based on Alastair Bridgewater SWIM analysis, 2001
7 * based on SWIM3 driver (c) Paul Mackerras, 1996
8 * based on netBSD IWM driver (c) 1997, 1998 Hauke Fath.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * 2004-08-21 (lv) - Initial implementation
16 * 2008-10-30 (lv) - Port to 2.6
17 */
18
19#include <linux/module.h>
20#include <linux/fd.h>
5a0e3ad6 21#include <linux/slab.h>
8852ecd9
LV		 22#include <linux/blkdev.h>
23#include <linux/hdreg.h>
24#include <linux/kernel.h>
25#include <linux/delay.h>
26#include <linux/platform_device.h>
27
28#include <asm/macintosh.h>
29#include <asm/mac_via.h>
30
31#define CARDNAME "swim"
32
33struct sector_header {
34 unsigned char side;
35 unsigned char track;
36 unsigned char sector;
37 unsigned char size;
38 unsigned char crc0;
39 unsigned char crc1;
40} __attribute__((packed));
41
42#define DRIVER_VERSION "Version 0.2 (2008-10-30)"
43
44#define REG(x) unsigned char x, x ## _pad[0x200 - 1];
45
46struct swim {
47 REG(write_data)
48 REG(write_mark)
49 REG(write_CRC)
50 REG(write_parameter)
51 REG(write_phase)
52 REG(write_setup)
53 REG(write_mode0)
54 REG(write_mode1)
55
56 REG(read_data)
57 REG(read_mark)
58 REG(read_error)
59 REG(read_parameter)
60 REG(read_phase)
61 REG(read_setup)
62 REG(read_status)
63 REG(read_handshake)
64} __attribute__((packed));
65
66#define swim_write(base, reg, v) out_8(&(base)->write_##reg, (v))
67#define swim_read(base, reg) in_8(&(base)->read_##reg)
68
69/* IWM registers */
70
71struct iwm {
72 REG(ph0L)
73 REG(ph0H)
74 REG(ph1L)
75 REG(ph1H)
76 REG(ph2L)
77 REG(ph2H)
78 REG(ph3L)
79 REG(ph3H)
80 REG(mtrOff)
81 REG(mtrOn)
82 REG(intDrive)
83 REG(extDrive)
84 REG(q6L)
85 REG(q6H)
86 REG(q7L)
87 REG(q7H)
88} __attribute__((packed));
89
90#define iwm_write(base, reg, v) out_8(&(base)->reg, (v))
91#define iwm_read(base, reg) in_8(&(base)->reg)
92
93/* bits in phase register */
94
95#define SEEK_POSITIVE 0x070
96#define SEEK_NEGATIVE 0x074
97#define STEP 0x071
98#define MOTOR_ON 0x072
99#define MOTOR_OFF 0x076
100#define INDEX 0x073
101#define EJECT 0x077
102#define SETMFM 0x171
103#define SETGCR 0x175
104
105#define RELAX 0x033
106#define LSTRB 0x008
107
108#define CA_MASK 0x077
109
110/* Select values for swim_select and swim_readbit */
111
112#define READ_DATA_0 0x074
113#define TWOMEG_DRIVE 0x075
114#define SINGLE_SIDED 0x076
115#define DRIVE_PRESENT 0x077
116#define DISK_IN 0x170
117#define WRITE_PROT 0x171
118#define TRACK_ZERO 0x172
119#define TACHO 0x173
120#define READ_DATA_1 0x174
121#define MFM_MODE 0x175
122#define SEEK_COMPLETE 0x176
123#define ONEMEG_MEDIA 0x177
124
125/* Bits in handshake register */
126
127#define MARK_BYTE 0x01
128#define CRC_ZERO 0x02
129#define RDDATA 0x04
130#define SENSE 0x08
131#define MOTEN 0x10
132#define ERROR 0x20
133#define DAT2BYTE 0x40
134#define DAT1BYTE 0x80
135
136/* bits in setup register */
137
138#define S_INV_WDATA 0x01
139#define S_3_5_SELECT 0x02
140#define S_GCR 0x04
141#define S_FCLK_DIV2 0x08
142#define S_ERROR_CORR 0x10
143#define S_IBM_DRIVE 0x20
144#define S_GCR_WRITE 0x40
145#define S_TIMEOUT 0x80
146
147/* bits in mode register */
148
149#define CLFIFO 0x01
150#define ENBL1 0x02
151#define ENBL2 0x04
152#define ACTION 0x08
153#define WRITE_MODE 0x10
154#define HEDSEL 0x20
155#define MOTON 0x80
156
157/*----------------------------------------------------------------------------*/
158
159enum drive_location {
160 INTERNAL_DRIVE = 0x02,
161 EXTERNAL_DRIVE = 0x04,
162};
163
164enum media_type {
165 DD_MEDIA,
166 HD_MEDIA,
167};
168
169struct floppy_state {
170
171 /* physical properties */
172
173 enum drive_location location; /* internal or external drive */
174 int head_number; /* single- or double-sided drive */
175
176 /* media */
177
178 int disk_in;
179 int ejected;
180 enum media_type type;
181 int write_protected;
182
183 int total_secs;
184 int secpercyl;
185 int secpertrack;
186
187 /* in-use information */
188
189 int track;
190 int ref_count;
191
192 struct gendisk *disk;
193
194 /* parent controller */
195
196 struct swim_priv *swd;
197};
198
199enum motor_action {
200 OFF,
201 ON,
202};
203
204enum head {
205 LOWER_HEAD = 0,
206 UPPER_HEAD = 1,
207};
208
209#define FD_MAX_UNIT 2
210
211struct swim_priv {
212 struct swim __iomem *base;
213 spinlock_t lock;
214 struct request_queue *queue;
215 int floppy_count;
216 struct floppy_state unit[FD_MAX_UNIT];
217};
218
219extern int swim_read_sector_header(struct swim __iomem *base,
220 struct sector_header *header);
221extern int swim_read_sector_data(struct swim __iomem *base,
222 unsigned char *data);
223
224static inline void set_swim_mode(struct swim __iomem *base, int enable)
225{
226 struct iwm __iomem *iwm_base;
227 unsigned long flags;
228
229 if (!enable) {
230 swim_write(base, mode0, 0xf8);
231 return;
232 }
233
234 iwm_base = (struct iwm __iomem *)base;
235 local_irq_save(flags);
236
237 iwm_read(iwm_base, q7L);
238 iwm_read(iwm_base, mtrOff);
239 iwm_read(iwm_base, q6H);
240
241 iwm_write(iwm_base, q7H, 0x57);
242 iwm_write(iwm_base, q7H, 0x17);
243 iwm_write(iwm_base, q7H, 0x57);
244 iwm_write(iwm_base, q7H, 0x57);
245
246 local_irq_restore(flags);
247}
248
249static inline int get_swim_mode(struct swim __iomem *base)
250{
251 unsigned long flags;
252
253 local_irq_save(flags);
254
255 swim_write(base, phase, 0xf5);
256 if (swim_read(base, phase) != 0xf5)
257 goto is_iwm;
258 swim_write(base, phase, 0xf6);
259 if (swim_read(base, phase) != 0xf6)
260 goto is_iwm;
261 swim_write(base, phase, 0xf7);
262 if (swim_read(base, phase) != 0xf7)
263 goto is_iwm;
264 local_irq_restore(flags);
265 return 1;
266is_iwm:
267 local_irq_restore(flags);
268 return 0;
269}
270
271static inline void swim_select(struct swim __iomem *base, int sel)
272{
273 swim_write(base, phase, RELAX);
274
275 via1_set_head(sel & 0x100);
276
277 swim_write(base, phase, sel & CA_MASK);
278}
279
280static inline void swim_action(struct swim __iomem *base, int action)
281{
282 unsigned long flags;
283
284 local_irq_save(flags);
285
286 swim_select(base, action);
287 udelay(1);
288 swim_write(base, phase, (LSTRB<<4) | LSTRB);
289 udelay(1);
290 swim_write(base, phase, (LSTRB<<4) | ((~LSTRB) & 0x0F));
291 udelay(1);
292
293 local_irq_restore(flags);
294}
295
296static inline int swim_readbit(struct swim __iomem *base, int bit)
297{
298 int stat;
299
300 swim_select(base, bit);
301
302 udelay(10);
303
304 stat = swim_read(base, handshake);
305
306 return (stat & SENSE) == 0;
307}
308
309static inline void swim_drive(struct swim __iomem *base,
310 enum drive_location location)
311{
312 if (location == INTERNAL_DRIVE) {
313 swim_write(base, mode0, EXTERNAL_DRIVE); /* clear drive 1 bit */
314 swim_write(base, mode1, INTERNAL_DRIVE); /* set drive 0 bit */
315 } else if (location == EXTERNAL_DRIVE) {
316 swim_write(base, mode0, INTERNAL_DRIVE); /* clear drive 0 bit */
317 swim_write(base, mode1, EXTERNAL_DRIVE); /* set drive 1 bit */
318 }
319}
320
321static inline void swim_motor(struct swim __iomem *base,
322 enum motor_action action)
323{
324 if (action == ON) {
325 int i;
326
327 swim_action(base, MOTOR_ON);
328
329 for (i = 0; i < 2*HZ; i++) {
330 swim_select(base, RELAX);
331 if (swim_readbit(base, MOTOR_ON))
332 break;
333 current->state = TASK_INTERRUPTIBLE;
334 schedule_timeout(1);
335 }
336 } else if (action == OFF) {
337 swim_action(base, MOTOR_OFF);
338 swim_select(base, RELAX);
339 }
340}
341
342static inline void swim_eject(struct swim __iomem *base)
343{
344 int i;
345
346 swim_action(base, EJECT);
347
348 for (i = 0; i < 2*HZ; i++) {
349 swim_select(base, RELAX);
350 if (!swim_readbit(base, DISK_IN))
351 break;
352 current->state = TASK_INTERRUPTIBLE;
353 schedule_timeout(1);
354 }
355 swim_select(base, RELAX);
356}
357
358static inline void swim_head(struct swim __iomem *base, enum head head)
359{
360 /* wait drive is ready */
361
362 if (head == UPPER_HEAD)
363 swim_select(base, READ_DATA_1);
364 else if (head == LOWER_HEAD)
365 swim_select(base, READ_DATA_0);
366}
367
368static inline int swim_step(struct swim __iomem *base)
369{
370 int wait;
371
372 swim_action(base, STEP);
373
374 for (wait = 0; wait < HZ; wait++) {
375
376 current->state = TASK_INTERRUPTIBLE;
377 schedule_timeout(1);
378
379 swim_select(base, RELAX);
380 if (!swim_readbit(base, STEP))
381 return 0;
382 }
383 return -1;
384}
385
386static inline int swim_track00(struct swim __iomem *base)
387{
388 int try;
389
390 swim_action(base, SEEK_NEGATIVE);
391
392 for (try = 0; try < 100; try++) {
393
394 swim_select(base, RELAX);
395 if (swim_readbit(base, TRACK_ZERO))
396 break;
397
398 if (swim_step(base))
399 return -1;
400 }
401
402 if (swim_readbit(base, TRACK_ZERO))
403 return 0;
404
405 return -1;
406}
407
408static inline int swim_seek(struct swim __iomem *base, int step)
409{
410 if (step == 0)
411 return 0;
412
413 if (step < 0) {
414 swim_action(base, SEEK_NEGATIVE);
415 step = -step;
416 } else
417 swim_action(base, SEEK_POSITIVE);
418
419 for ( ; step > 0; step--) {
420 if (swim_step(base))
421 return -1;
422 }
423
424 return 0;
425}
426
427static inline int swim_track(struct floppy_state *fs, int track)
428{
429 struct swim __iomem *base = fs->swd->base;
430 int ret;
431
432 ret = swim_seek(base, track - fs->track);
433
434 if (ret == 0)
435 fs->track = track;
436 else {
437 swim_track00(base);
438 fs->track = 0;
439 }
440
441 return ret;
442}
443
444static int floppy_eject(struct floppy_state *fs)
445{
446 struct swim __iomem *base = fs->swd->base;
447
448 swim_drive(base, fs->location);
449 swim_motor(base, OFF);
450 swim_eject(base);
451
452 fs->disk_in = 0;
453 fs->ejected = 1;
454
455 return 0;
456}
457
458static inline int swim_read_sector(struct floppy_state *fs,
459 int side, int track,
460 int sector, unsigned char *buffer)
461{
462 struct swim __iomem *base = fs->swd->base;
463 unsigned long flags;
464 struct sector_header header;
465 int ret = -1;
466 short i;
467
468 swim_track(fs, track);
469
470 swim_write(base, mode1, MOTON);
471 swim_head(base, side);
472 swim_write(base, mode0, side);
473
474 local_irq_save(flags);
475 for (i = 0; i < 36; i++) {
476 ret = swim_read_sector_header(base, &header);
477 if (!ret && (header.sector == sector)) {
478 /* found */
479
480 ret = swim_read_sector_data(base, buffer);
481 break;
482 }
483 }
484 local_irq_restore(flags);
485
486 swim_write(base, mode0, MOTON);
487
488 if ((header.side != side) || (header.track != track) ||
489 (header.sector != sector))
490 return 0;
491
492 return ret;
493}
494
495static int floppy_read_sectors(struct floppy_state *fs,
496 int req_sector, int sectors_nb,
497 unsigned char *buffer)
498{
499 struct swim __iomem *base = fs->swd->base;
500 int ret;
501 int side, track, sector;
502 int i, try;
503
504
505 swim_drive(base, fs->location);
506 for (i = req_sector; i < req_sector + sectors_nb; i++) {
507 int x;
508 track = i / fs->secpercyl;
509 x = i % fs->secpercyl;
510 side = x / fs->secpertrack;
511 sector = x % fs->secpertrack + 1;
512
513 try = 5;
514 do {
515 ret = swim_read_sector(fs, side, track, sector,
516 buffer);
517 if (try-- == 0)
06b0608e 518 return -EIO;
8852ecd9
LV		 519 } while (ret != 512);
520
521 buffer += ret;
522 }
523
524 return 0;
525}
526
527static void redo_fd_request(struct request_queue *q)
528{
529 struct request *req;
530 struct floppy_state *fs;
531
9934c8c0 532 req = blk_fetch_request(q);
06b0608e
TH		 533 while (req) {
534 int err = -EIO;
8852ecd9
LV		 535
536 fs = req->rq_disk->private_data;
06b0608e
TH		 537 if (blk_rq_pos(req) >= fs->total_secs)
538 goto done;
539 if (!fs->disk_in)
540 goto done;
541 if (rq_data_dir(req) == WRITE && fs->write_protected)
542 goto done;
543
8852ecd9
LV		 544 switch (rq_data_dir(req)) {
545 case WRITE:
546 /* NOT IMPLEMENTED */
8852ecd9
LV		 547 break;
548 case READ:
06b0608e
TH		 549 err = floppy_read_sectors(fs, blk_rq_pos(req),
550 blk_rq_cur_sectors(req),
551 req->buffer);
8852ecd9
LV		 552 break;
553 }
06b0608e 554 done:
9934c8c0
TH		 555 if (!__blk_end_request_cur(req, err))
556 req = blk_fetch_request(q);
8852ecd9
LV		 557 }
558}
559
560static void do_fd_request(struct request_queue *q)
561{
562 redo_fd_request(q);
563}
564
565static struct floppy_struct floppy_type[4] = {
566 { 0, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, NULL }, /* no testing */
567 { 720, 9, 1, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 360KB SS 3.5"*/
568 { 1440, 9, 2, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 720KB 3.5" */
569 { 2880, 18, 2, 80, 0, 0x1B, 0x00, 0xCF, 0x6C, NULL }, /* 1.44MB 3.5" */
570};
571
572static int get_floppy_geometry(struct floppy_state *fs, int type,
573 struct floppy_struct **g)
574{
575 if (type >= ARRAY_SIZE(floppy_type))
576 return -EINVAL;
577
578 if (type)
579 *g = &floppy_type[type];
580 else if (fs->type == HD_MEDIA) /* High-Density media */
581 *g = &floppy_type[3];
582 else if (fs->head_number == 2) /* double-sided */
583 *g = &floppy_type[2];
584 else
585 *g = &floppy_type[1];
586
587 return 0;
588}
589
590static void setup_medium(struct floppy_state *fs)
591{
592 struct swim __iomem *base = fs->swd->base;
593
594 if (swim_readbit(base, DISK_IN)) {
595 struct floppy_struct *g;
596 fs->disk_in = 1;
597 fs->write_protected = swim_readbit(base, WRITE_PROT);
598 fs->type = swim_readbit(base, ONEMEG_MEDIA);
599
600 if (swim_track00(base))
601 printk(KERN_ERR
602 "SWIM: cannot move floppy head to track 0\n");
603
604 swim_track00(base);
605
606 get_floppy_geometry(fs, 0, &g);
607 fs->total_secs = g->size;
608 fs->secpercyl = g->head * g->sect;
609 fs->secpertrack = g->sect;
610 fs->track = 0;
611 } else {
612 fs->disk_in = 0;
613 }
614}
615
616static int floppy_open(struct block_device *bdev, fmode_t mode)
617{
618 struct floppy_state *fs = bdev->bd_disk->private_data;
619 struct swim __iomem *base = fs->swd->base;
620 int err;
621
622 if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL))
623 return -EBUSY;
624
625 if (mode & FMODE_EXCL)
626 fs->ref_count = -1;
627 else
628 fs->ref_count++;
629
630 swim_write(base, setup, S_IBM_DRIVE | S_FCLK_DIV2);
631 udelay(10);
632 swim_drive(base, INTERNAL_DRIVE);
633 swim_motor(base, ON);
634 swim_action(base, SETMFM);
635 if (fs->ejected)
636 setup_medium(fs);
637 if (!fs->disk_in) {
638 err = -ENXIO;
639 goto out;
640 }
641
642 if (mode & FMODE_NDELAY)
643 return 0;
644
645 if (mode & (FMODE_READ|FMODE_WRITE)) {
646 check_disk_change(bdev);
647 if ((mode & FMODE_WRITE) && fs->write_protected) {
648 err = -EROFS;
649 goto out;
650 }
651 }
652 return 0;
653out:
654 if (fs->ref_count < 0)
655 fs->ref_count = 0;
656 else if (fs->ref_count > 0)
657 --fs->ref_count;
658
659 if (fs->ref_count == 0)
660 swim_motor(base, OFF);
661 return err;
662}
663
664static int floppy_release(struct gendisk *disk, fmode_t mode)
665{
666 struct floppy_state *fs = disk->private_data;
667 struct swim __iomem *base = fs->swd->base;
668
669 if (fs->ref_count < 0)
670 fs->ref_count = 0;
671 else if (fs->ref_count > 0)
672 --fs->ref_count;
673
674 if (fs->ref_count == 0)
675 swim_motor(base, OFF);
676
677 return 0;
678}
679
680static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
681 unsigned int cmd, unsigned long param)
682{
683 struct floppy_state *fs = bdev->bd_disk->private_data;
684 int err;
685
686 if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))
687 return -EPERM;
688
689 switch (cmd) {
690 case FDEJECT:
691 if (fs->ref_count != 1)
692 return -EBUSY;
693 err = floppy_eject(fs);
694 return err;
695
696 case FDGETPRM:
697 if (copy_to_user((void __user *) param, (void *) &floppy_type,
698 sizeof(struct floppy_struct)))
699 return -EFAULT;
700 break;
701
702 default:
703 printk(KERN_DEBUG "SWIM floppy_ioctl: unknown cmd %d\n",
704 cmd);
705 return -ENOSYS;
706 }
707 return 0;
708}
709
710static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
711{
712 struct floppy_state *fs = bdev->bd_disk->private_data;
713 struct floppy_struct *g;
714 int ret;
715
716 ret = get_floppy_geometry(fs, 0, &g);
717 if (ret)
718 return ret;
719
720 geo->heads = g->head;
721 geo->sectors = g->sect;
722 geo->cylinders = g->track;
723
724 return 0;
725}
726
727static int floppy_check_change(struct gendisk *disk)
728{
729 struct floppy_state *fs = disk->private_data;
730
731 return fs->ejected;
732}
733
734static int floppy_revalidate(struct gendisk *disk)
735{
736 struct floppy_state *fs = disk->private_data;
737 struct swim __iomem *base = fs->swd->base;
738
739 swim_drive(base, fs->location);
740
741 if (fs->ejected)
742 setup_medium(fs);
743
744 if (!fs->disk_in)
745 swim_motor(base, OFF);
746 else
747 fs->ejected = 0;
748
749 return !fs->disk_in;
750}
751
83d5cde4 752static const struct block_device_operations floppy_fops = {
8852ecd9
LV		 753 .owner = THIS_MODULE,
754 .open = floppy_open,
755 .release = floppy_release,
756 .locked_ioctl = floppy_ioctl,
757 .getgeo = floppy_getgeo,
758 .media_changed = floppy_check_change,
759 .revalidate_disk = floppy_revalidate,
760};
761
762static struct kobject *floppy_find(dev_t dev, int *part, void *data)
763{
764 struct swim_priv *swd = data;
765 int drive = (*part & 3);
766
767 if (drive > swd->floppy_count)
768 return NULL;
769
770 *part = 0;
771 return get_disk(swd->unit[drive].disk);
772}
773
774static int __devinit swim_add_floppy(struct swim_priv *swd,
775 enum drive_location location)
776{
777 struct floppy_state *fs = &swd->unit[swd->floppy_count];
778 struct swim __iomem *base = swd->base;
779
780 fs->location = location;
781
782 swim_drive(base, location);
783
784 swim_motor(base, OFF);
785
786 if (swim_readbit(base, SINGLE_SIDED))
787 fs->head_number = 1;
788 else
789 fs->head_number = 2;
790 fs->ref_count = 0;
791 fs->ejected = 1;
792
793 swd->floppy_count++;
794
795 return 0;
796}
797
798static int __devinit swim_floppy_init(struct swim_priv *swd)
799{
800 int err;
801 int drive;
802 struct swim __iomem *base = swd->base;
803
804 /* scan floppy drives */
805
806 swim_drive(base, INTERNAL_DRIVE);
807 if (swim_readbit(base, DRIVE_PRESENT))
808 swim_add_floppy(swd, INTERNAL_DRIVE);
809 swim_drive(base, EXTERNAL_DRIVE);
810 if (swim_readbit(base, DRIVE_PRESENT))
811 swim_add_floppy(swd, EXTERNAL_DRIVE);
812
813 /* register floppy drives */
814
815 err = register_blkdev(FLOPPY_MAJOR, "fd");
816 if (err) {
817 printk(KERN_ERR "Unable to get major %d for SWIM floppy\n",
818 FLOPPY_MAJOR);
819 return -EBUSY;
820 }
821
822 for (drive = 0; drive < swd->floppy_count; drive++) {
823 swd->unit[drive].disk = alloc_disk(1);
824 if (swd->unit[drive].disk == NULL) {
825 err = -ENOMEM;
826 goto exit_put_disks;
827 }
828 swd->unit[drive].swd = swd;
829 }
830
831 swd->queue = blk_init_queue(do_fd_request, &swd->lock);
832 if (!swd->queue) {
833 err = -ENOMEM;
834 goto exit_put_disks;
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->private_data = &swd->unit[drive];
844 swd->unit[drive].disk->queue = swd->queue;
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 while (drive--)
857 put_disk(swd->unit[drive].disk);
858 return err;
859}
860
861static int __devinit swim_probe(struct platform_device *dev)
862{
863 struct resource *res;
864 struct swim __iomem *swim_base;
865 struct swim_priv *swd;
866 int ret;
867
2724daf4 868 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
8852ecd9
LV		 869 if (!res) {
870 ret = -ENODEV;
871 goto out;
872 }
873
874 if (!request_mem_region(res->start, resource_size(res), CARDNAME)) {
875 ret = -EBUSY;
876 goto out;
877 }
878
879 swim_base = ioremap(res->start, resource_size(res));
880 if (!swim_base) {
881 return -ENOMEM;
882 goto out_release_io;
883 }
884
885 /* probe device */
886
887 set_swim_mode(swim_base, 1);
888 if (!get_swim_mode(swim_base)) {
889 printk(KERN_INFO "SWIM device not found !\n");
890 ret = -ENODEV;
891 goto out_iounmap;
892 }
893
894 /* set platform driver data */
895
896 swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL);
897 if (!swd) {
898 ret = -ENOMEM;
899 goto out_iounmap;
900 }
901 platform_set_drvdata(dev, swd);
902
903 swd->base = swim_base;
904
905 ret = swim_floppy_init(swd);
906 if (ret)
907 goto out_kfree;
908
909 return 0;
910
911out_kfree:
912 platform_set_drvdata(dev, NULL);
913 kfree(swd);
914out_iounmap:
915 iounmap(swim_base);
916out_release_io:
917 release_mem_region(res->start, resource_size(res));
918out:
919 return ret;
920}
921
922static int __devexit swim_remove(struct platform_device *dev)
923{
924 struct swim_priv *swd = platform_get_drvdata(dev);
925 int drive;
926 struct resource *res;
927
928 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
929
930 for (drive = 0; drive < swd->floppy_count; drive++) {
931 del_gendisk(swd->unit[drive].disk);
932 put_disk(swd->unit[drive].disk);
933 }
934
935 unregister_blkdev(FLOPPY_MAJOR, "fd");
936
937 blk_cleanup_queue(swd->queue);
938
939 /* eject floppies */
940
941 for (drive = 0; drive < swd->floppy_count; drive++)
942 floppy_eject(&swd->unit[drive]);
943
944 iounmap(swd->base);
945
2724daf4 946 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
8852ecd9
LV		 947 if (res)
948 release_mem_region(res->start, resource_size(res));
949
950 platform_set_drvdata(dev, NULL);
951 kfree(swd);
952
953 return 0;
954}
955
956static struct platform_driver swim_driver = {
957 .probe = swim_probe,
958 .remove = __devexit_p(swim_remove),
959 .driver = {
960 .name = CARDNAME,
961 .owner = THIS_MODULE,
962 },
963};
964
965static int __init swim_init(void)
966{
967 printk(KERN_INFO "SWIM floppy driver %s\n", DRIVER_VERSION);
968
969 return platform_driver_register(&swim_driver);
970}
971module_init(swim_init);
972
973static void __exit swim_exit(void)
974{
975 platform_driver_unregister(&swim_driver);
976}
977module_exit(swim_exit);
978
979MODULE_DESCRIPTION("Driver for SWIM floppy controller");
980MODULE_LICENSE("GPL");
981MODULE_AUTHOR("Laurent Vivier <laurent@lvivier.info>");
982MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);
Linux 6.x block layer and io_uring tree(s)