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>
21 #include <linux/blkdev.h>
22 #include <linux/hdreg.h>
23 #include <linux/kernel.h>
24 #include <linux/delay.h>
25 #include <linux/platform_device.h>
26
27 #include <asm/macintosh.h>
28 #include <asm/mac_via.h>
29
30 #define CARDNAME "swim"
31
32 struct sector_header {
33 unsigned char side;
34 unsigned char track;
35 unsigned char sector;
36 unsigned char size;
37 unsigned char crc0;
38 unsigned char crc1;
39 } __attribute__((packed));
40
41 #define DRIVER_VERSION "Version 0.2 (2008-10-30)"
42
43 #define REG(x) unsigned char x, x ## _pad[0x200 - 1];
44
45 struct swim {
46 REG(write_data)
47 REG(write_mark)
48 REG(write_CRC)
49 REG(write_parameter)
50 REG(write_phase)
51 REG(write_setup)
52 REG(write_mode0)
53 REG(write_mode1)
54
55 REG(read_data)
56 REG(read_mark)
57 REG(read_error)
58 REG(read_parameter)
59 REG(read_phase)
60 REG(read_setup)
61 REG(read_status)
62 REG(read_handshake)
63 } __attribute__((packed));
64
65 #define swim_write(base, reg, v) out_8(&(base)->write_##reg, (v))
66 #define swim_read(base, reg) in_8(&(base)->read_##reg)
67
68 /* IWM registers */
69
70 struct iwm {
71 REG(ph0L)
72 REG(ph0H)
73 REG(ph1L)
74 REG(ph1H)
75 REG(ph2L)
76 REG(ph2H)
77 REG(ph3L)
78 REG(ph3H)
79 REG(mtrOff)
80 REG(mtrOn)
81 REG(intDrive)
82 REG(extDrive)
83 REG(q6L)
84 REG(q6H)
85 REG(q7L)
86 REG(q7H)
87 } __attribute__((packed));
88
89 #define iwm_write(base, reg, v) out_8(&(base)->reg, (v))
90 #define iwm_read(base, reg) in_8(&(base)->reg)
91
92 /* bits in phase register */
93
94 #define SEEK_POSITIVE 0x070
95 #define SEEK_NEGATIVE 0x074
96 #define STEP 0x071
97 #define MOTOR_ON 0x072
98 #define MOTOR_OFF 0x076
99 #define INDEX 0x073
100 #define EJECT 0x077
101 #define SETMFM 0x171
102 #define SETGCR 0x175
103
104 #define RELAX 0x033
105 #define LSTRB 0x008
106
107 #define CA_MASK 0x077
108
109 /* Select values for swim_select and swim_readbit */
110
111 #define READ_DATA_0 0x074
112 #define TWOMEG_DRIVE 0x075
113 #define SINGLE_SIDED 0x076
114 #define DRIVE_PRESENT 0x077
115 #define DISK_IN 0x170
116 #define WRITE_PROT 0x171
117 #define TRACK_ZERO 0x172
118 #define TACHO 0x173
119 #define READ_DATA_1 0x174
120 #define MFM_MODE 0x175
121 #define SEEK_COMPLETE 0x176
122 #define ONEMEG_MEDIA 0x177
123
124 /* Bits in handshake register */
125
126 #define MARK_BYTE 0x01
127 #define CRC_ZERO 0x02
128 #define RDDATA 0x04
129 #define SENSE 0x08
130 #define MOTEN 0x10
131 #define ERROR 0x20
132 #define DAT2BYTE 0x40
133 #define DAT1BYTE 0x80
134
135 /* bits in setup register */
136
137 #define S_INV_WDATA 0x01
138 #define S_3_5_SELECT 0x02
139 #define S_GCR 0x04
140 #define S_FCLK_DIV2 0x08
141 #define S_ERROR_CORR 0x10
142 #define S_IBM_DRIVE 0x20
143 #define S_GCR_WRITE 0x40
144 #define S_TIMEOUT 0x80
145
146 /* bits in mode register */
147
148 #define CLFIFO 0x01
149 #define ENBL1 0x02
150 #define ENBL2 0x04
151 #define ACTION 0x08
152 #define WRITE_MODE 0x10
153 #define HEDSEL 0x20
154 #define MOTON 0x80
155
156 /*----------------------------------------------------------------------------*/
157
158 enum drive_location {
159 INTERNAL_DRIVE = 0x02,
160 EXTERNAL_DRIVE = 0x04,
161 };
162
163 enum media_type {
164 DD_MEDIA,
165 HD_MEDIA,
166 };
167
168 struct floppy_state {
169
170 /* physical properties */
171
172 enum drive_location location; /* internal or external drive */
173 int head_number; /* single- or double-sided drive */
174
175 /* media */
176
177 int disk_in;
178 int ejected;
179 enum media_type type;
180 int write_protected;
181
182 int total_secs;
183 int secpercyl;
184 int secpertrack;
185
186 /* in-use information */
187
188 int track;
189 int ref_count;
190
191 struct gendisk *disk;
192
193 /* parent controller */
194
195 struct swim_priv *swd;
196 };
197
198 enum motor_action {
199 OFF,
200 ON,
201 };
202
203 enum head {
204 LOWER_HEAD = 0,
205 UPPER_HEAD = 1,
206 };
207
208 #define FD_MAX_UNIT 2
209
210 struct swim_priv {
211 struct swim __iomem *base;
212 spinlock_t lock;
213 struct request_queue *queue;
214 int floppy_count;
215 struct floppy_state unit[FD_MAX_UNIT];
216 };
217
218 extern int swim_read_sector_header(struct swim __iomem *base,
219 struct sector_header *header);
220 extern int swim_read_sector_data(struct swim __iomem *base,
221 unsigned char *data);
222
223 static inline void set_swim_mode(struct swim __iomem *base, int enable)
224 {
225 struct iwm __iomem *iwm_base;
226 unsigned long flags;
227
228 if (!enable) {
229 swim_write(base, mode0, 0xf8);
230 return;
231 }
232
233 iwm_base = (struct iwm __iomem *)base;
234 local_irq_save(flags);
235
236 iwm_read(iwm_base, q7L);
237 iwm_read(iwm_base, mtrOff);
238 iwm_read(iwm_base, q6H);
239
240 iwm_write(iwm_base, q7H, 0x57);
241 iwm_write(iwm_base, q7H, 0x17);
242 iwm_write(iwm_base, q7H, 0x57);
243 iwm_write(iwm_base, q7H, 0x57);
244
245 local_irq_restore(flags);
246 }
247
248 static inline int get_swim_mode(struct swim __iomem *base)
249 {
250 unsigned long flags;
251
252 local_irq_save(flags);
253
254 swim_write(base, phase, 0xf5);
255 if (swim_read(base, phase) != 0xf5)
256 goto is_iwm;
257 swim_write(base, phase, 0xf6);
258 if (swim_read(base, phase) != 0xf6)
259 goto is_iwm;
260 swim_write(base, phase, 0xf7);
261 if (swim_read(base, phase) != 0xf7)
262 goto is_iwm;
263 local_irq_restore(flags);
264 return 1;
265 is_iwm:
266 local_irq_restore(flags);
267 return 0;
268 }
269
270 static inline void swim_select(struct swim __iomem *base, int sel)
271 {
272 swim_write(base, phase, RELAX);
273
274 via1_set_head(sel & 0x100);
275
276 swim_write(base, phase, sel & CA_MASK);
277 }
278
279 static inline void swim_action(struct swim __iomem *base, int action)
280 {
281 unsigned long flags;
282
283 local_irq_save(flags);
284
285 swim_select(base, action);
286 udelay(1);
287 swim_write(base, phase, (LSTRB<<4) | LSTRB);
288 udelay(1);
289 swim_write(base, phase, (LSTRB<<4) | ((~LSTRB) & 0x0F));
290 udelay(1);
291
292 local_irq_restore(flags);
293 }
294
295 static inline int swim_readbit(struct swim __iomem *base, int bit)
296 {
297 int stat;
298
299 swim_select(base, bit);
300
301 udelay(10);
302
303 stat = swim_read(base, handshake);
304
305 return (stat & SENSE) == 0;
306 }
307
308 static inline void swim_drive(struct swim __iomem *base,
309 enum drive_location location)
310 {
311 if (location == INTERNAL_DRIVE) {
312 swim_write(base, mode0, EXTERNAL_DRIVE); /* clear drive 1 bit */
313 swim_write(base, mode1, INTERNAL_DRIVE); /* set drive 0 bit */
314 } else if (location == EXTERNAL_DRIVE) {
315 swim_write(base, mode0, INTERNAL_DRIVE); /* clear drive 0 bit */
316 swim_write(base, mode1, EXTERNAL_DRIVE); /* set drive 1 bit */
317 }
318 }
319
320 static inline void swim_motor(struct swim __iomem *base,
321 enum motor_action action)
322 {
323 if (action == ON) {
324 int i;
325
326 swim_action(base, MOTOR_ON);
327
328 for (i = 0; i < 2*HZ; i++) {
329 swim_select(base, RELAX);
330 if (swim_readbit(base, MOTOR_ON))
331 break;
332 current->state = TASK_INTERRUPTIBLE;
333 schedule_timeout(1);
334 }
335 } else if (action == OFF) {
336 swim_action(base, MOTOR_OFF);
337 swim_select(base, RELAX);
338 }
339 }
340
341 static inline void swim_eject(struct swim __iomem *base)
342 {
343 int i;
344
345 swim_action(base, EJECT);
346
347 for (i = 0; i < 2*HZ; i++) {
348 swim_select(base, RELAX);
349 if (!swim_readbit(base, DISK_IN))
350 break;
351 current->state = TASK_INTERRUPTIBLE;
352 schedule_timeout(1);
353 }
354 swim_select(base, RELAX);
355 }
356
357 static inline void swim_head(struct swim __iomem *base, enum head head)
358 {
359 /* wait drive is ready */
360
361 if (head == UPPER_HEAD)
362 swim_select(base, READ_DATA_1);
363 else if (head == LOWER_HEAD)
364 swim_select(base, READ_DATA_0);
365 }
366
367 static inline int swim_step(struct swim __iomem *base)
368 {
369 int wait;
370
371 swim_action(base, STEP);
372
373 for (wait = 0; wait < HZ; wait++) {
374
375 current->state = TASK_INTERRUPTIBLE;
376 schedule_timeout(1);
377
378 swim_select(base, RELAX);
379 if (!swim_readbit(base, STEP))
380 return 0;
381 }
382 return -1;
383 }
384
385 static inline int swim_track00(struct swim __iomem *base)
386 {
387 int try;
388
389 swim_action(base, SEEK_NEGATIVE);
390
391 for (try = 0; try < 100; try++) {
392
393 swim_select(base, RELAX);
394 if (swim_readbit(base, TRACK_ZERO))
395 break;
396
397 if (swim_step(base))
398 return -1;
399 }
400
401 if (swim_readbit(base, TRACK_ZERO))
402 return 0;
403
404 return -1;
405 }
406
407 static inline int swim_seek(struct swim __iomem *base, int step)
408 {
409 if (step == 0)
410 return 0;
411
412 if (step < 0) {
413 swim_action(base, SEEK_NEGATIVE);
414 step = -step;
415 } else
416 swim_action(base, SEEK_POSITIVE);
417
418 for ( ; step > 0; step--) {
419 if (swim_step(base))
420 return -1;
421 }
422
423 return 0;
424 }
425
426 static inline int swim_track(struct floppy_state *fs, int track)
427 {
428 struct swim __iomem *base = fs->swd->base;
429 int ret;
430
431 ret = swim_seek(base, track - fs->track);
432
433 if (ret == 0)
434 fs->track = track;
435 else {
436 swim_track00(base);
437 fs->track = 0;
438 }
439
440 return ret;
441 }
442
443 static int floppy_eject(struct floppy_state *fs)
444 {
445 struct swim __iomem *base = fs->swd->base;
446
447 swim_drive(base, fs->location);
448 swim_motor(base, OFF);
449 swim_eject(base);
450
451 fs->disk_in = 0;
452 fs->ejected = 1;
453
454 return 0;
455 }
456
457 static inline int swim_read_sector(struct floppy_state *fs,
458 int side, int track,
459 int sector, unsigned char *buffer)
460 {
461 struct swim __iomem *base = fs->swd->base;
462 unsigned long flags;
463 struct sector_header header;
464 int ret = -1;
465 short i;
466
467 swim_track(fs, track);
468
469 swim_write(base, mode1, MOTON);
470 swim_head(base, side);
471 swim_write(base, mode0, side);
472
473 local_irq_save(flags);
474 for (i = 0; i < 36; i++) {
475 ret = swim_read_sector_header(base, &header);
476 if (!ret && (header.sector == sector)) {
477 /* found */
478
479 ret = swim_read_sector_data(base, buffer);
480 break;
481 }
482 }
483 local_irq_restore(flags);
484
485 swim_write(base, mode0, MOTON);
486
487 if ((header.side != side) || (header.track != track) ||
488 (header.sector != sector))
489 return 0;
490
491 return ret;
492 }
493
494 static int floppy_read_sectors(struct floppy_state *fs,
495 int req_sector, int sectors_nb,
496 unsigned char *buffer)
497 {
498 struct swim __iomem *base = fs->swd->base;
499 int ret;
500 int side, track, sector;
501 int i, try;
502
503
504 swim_drive(base, fs->location);
505 for (i = req_sector; i < req_sector + sectors_nb; i++) {
506 int x;
507 track = i / fs->secpercyl;
508 x = i % fs->secpercyl;
509 side = x / fs->secpertrack;
510 sector = x % fs->secpertrack + 1;
511
512 try = 5;
513 do {
514 ret = swim_read_sector(fs, side, track, sector,
515 buffer);
516 if (try-- == 0)
517 return -EIO;
518 } while (ret != 512);
519
520 buffer += ret;
521 }
522
523 return 0;
524 }
525
526 static void redo_fd_request(struct request_queue *q)
527 {
528 struct request *req;
529 struct floppy_state *fs;
530
531 req = blk_fetch_request(q);
532 while (req) {
533 int err = -EIO;
534
535 fs = req->rq_disk->private_data;
536 if (blk_rq_pos(req) >= fs->total_secs)
537 goto done;
538 if (!fs->disk_in)
539 goto done;
540 if (rq_data_dir(req) == WRITE && fs->write_protected)
541 goto done;
542
543 switch (rq_data_dir(req)) {
544 case WRITE:
545 /* NOT IMPLEMENTED */
546 break;
547 case READ:
548 err = floppy_read_sectors(fs, blk_rq_pos(req),
549 blk_rq_cur_sectors(req),
550 req->buffer);
551 break;
552 }
553 done:
554 if (!__blk_end_request_cur(req, err))
555 req = blk_fetch_request(q);
556 }
557 }
558
559 static void do_fd_request(struct request_queue *q)
560 {
561 redo_fd_request(q);
562 }
563
564 static struct floppy_struct floppy_type[4] = {
565 { 0, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, NULL }, /* no testing */
566 { 720, 9, 1, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 360KB SS 3.5"*/
567 { 1440, 9, 2, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 720KB 3.5" */
568 { 2880, 18, 2, 80, 0, 0x1B, 0x00, 0xCF, 0x6C, NULL }, /* 1.44MB 3.5" */
569 };
570
571 static int get_floppy_geometry(struct floppy_state *fs, int type,
572 struct floppy_struct **g)
573 {
574 if (type >= ARRAY_SIZE(floppy_type))
575 return -EINVAL;
576
577 if (type)
578 *g = &floppy_type[type];
579 else if (fs->type == HD_MEDIA) /* High-Density media */
580 *g = &floppy_type[3];
581 else if (fs->head_number == 2) /* double-sided */
582 *g = &floppy_type[2];
583 else
584 *g = &floppy_type[1];
585
586 return 0;
587 }
588
589 static void setup_medium(struct floppy_state *fs)
590 {
591 struct swim __iomem *base = fs->swd->base;
592
593 if (swim_readbit(base, DISK_IN)) {
594 struct floppy_struct *g;
595 fs->disk_in = 1;
596 fs->write_protected = swim_readbit(base, WRITE_PROT);
597 fs->type = swim_readbit(base, ONEMEG_MEDIA);
598
599 if (swim_track00(base))
600 printk(KERN_ERR
601 "SWIM: cannot move floppy head to track 0\n");
602
603 swim_track00(base);
604
605 get_floppy_geometry(fs, 0, &g);
606 fs->total_secs = g->size;
607 fs->secpercyl = g->head * g->sect;
608 fs->secpertrack = g->sect;
609 fs->track = 0;
610 } else {
611 fs->disk_in = 0;
612 }
613 }
614
615 static int floppy_open(struct block_device *bdev, fmode_t mode)
616 {
617 struct floppy_state *fs = bdev->bd_disk->private_data;
618 struct swim __iomem *base = fs->swd->base;
619 int err;
620
621 if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL))
622 return -EBUSY;
623
624 if (mode & FMODE_EXCL)
625 fs->ref_count = -1;
626 else
627 fs->ref_count++;
628
629 swim_write(base, setup, S_IBM_DRIVE | S_FCLK_DIV2);
630 udelay(10);
631 swim_drive(base, INTERNAL_DRIVE);
632 swim_motor(base, ON);
633 swim_action(base, SETMFM);
634 if (fs->ejected)
635 setup_medium(fs);
636 if (!fs->disk_in) {
637 err = -ENXIO;
638 goto out;
639 }
640
641 if (mode & FMODE_NDELAY)
642 return 0;
643
644 if (mode & (FMODE_READ|FMODE_WRITE)) {
645 check_disk_change(bdev);
646 if ((mode & FMODE_WRITE) && fs->write_protected) {
647 err = -EROFS;
648 goto out;
649 }
650 }
651 return 0;
652 out:
653 if (fs->ref_count < 0)
654 fs->ref_count = 0;
655 else if (fs->ref_count > 0)
656 --fs->ref_count;
657
658 if (fs->ref_count == 0)
659 swim_motor(base, OFF);
660 return err;
661 }
662
663 static int floppy_release(struct gendisk *disk, fmode_t mode)
664 {
665 struct floppy_state *fs = disk->private_data;
666 struct swim __iomem *base = fs->swd->base;
667
668 if (fs->ref_count < 0)
669 fs->ref_count = 0;
670 else if (fs->ref_count > 0)
671 --fs->ref_count;
672
673 if (fs->ref_count == 0)
674 swim_motor(base, OFF);
675
676 return 0;
677 }
678
679 static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
680 unsigned int cmd, unsigned long param)
681 {
682 struct floppy_state *fs = bdev->bd_disk->private_data;
683 int err;
684
685 if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))
686 return -EPERM;
687
688 switch (cmd) {
689 case FDEJECT:
690 if (fs->ref_count != 1)
691 return -EBUSY;
692 err = floppy_eject(fs);
693 return err;
694
695 case FDGETPRM:
696 if (copy_to_user((void __user *) param, (void *) &floppy_type,
697 sizeof(struct floppy_struct)))
698 return -EFAULT;
699 break;
700
701 default:
702 printk(KERN_DEBUG "SWIM floppy_ioctl: unknown cmd %d\n",
703 cmd);
704 return -ENOSYS;
705 }
706 return 0;
707 }
708
709 static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
710 {
711 struct floppy_state *fs = bdev->bd_disk->private_data;
712 struct floppy_struct *g;
713 int ret;
714
715 ret = get_floppy_geometry(fs, 0, &g);
716 if (ret)
717 return ret;
718
719 geo->heads = g->head;
720 geo->sectors = g->sect;
721 geo->cylinders = g->track;
722
723 return 0;
724 }
725
726 static int floppy_check_change(struct gendisk *disk)
727 {
728 struct floppy_state *fs = disk->private_data;
729
730 return fs->ejected;
731 }
732
733 static int floppy_revalidate(struct gendisk *disk)
734 {
735 struct floppy_state *fs = disk->private_data;
736 struct swim __iomem *base = fs->swd->base;
737
738 swim_drive(base, fs->location);
739
740 if (fs->ejected)
741 setup_medium(fs);
742
743 if (!fs->disk_in)
744 swim_motor(base, OFF);
745 else
746 fs->ejected = 0;
747
748 return !fs->disk_in;
749 }
750
751 static struct block_device_operations floppy_fops = {
752 .owner = THIS_MODULE,
753 .open = floppy_open,
754 .release = floppy_release,
755 .locked_ioctl = floppy_ioctl,
756 .getgeo = floppy_getgeo,
757 .media_changed = floppy_check_change,
758 .revalidate_disk = floppy_revalidate,
759 };
760
761 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
762 {
763 struct swim_priv *swd = data;
764 int drive = (*part & 3);
765
766 if (drive > swd->floppy_count)
767 return NULL;
768
769 *part = 0;
770 return get_disk(swd->unit[drive].disk);
771 }
772
773 static int __devinit swim_add_floppy(struct swim_priv *swd,
774 enum drive_location location)
775 {
776 struct floppy_state *fs = &swd->unit[swd->floppy_count];
777 struct swim __iomem *base = swd->base;
778
779 fs->location = location;
780
781 swim_drive(base, location);
782
783 swim_motor(base, OFF);
784
785 if (swim_readbit(base, SINGLE_SIDED))
786 fs->head_number = 1;
787 else
788 fs->head_number = 2;
789 fs->ref_count = 0;
790 fs->ejected = 1;
791
792 swd->floppy_count++;
793
794 return 0;
795 }
796
797 static int __devinit swim_floppy_init(struct swim_priv *swd)
798 {
799 int err;
800 int drive;
801 struct swim __iomem *base = swd->base;
802
803 /* scan floppy drives */
804
805 swim_drive(base, INTERNAL_DRIVE);
806 if (swim_readbit(base, DRIVE_PRESENT))
807 swim_add_floppy(swd, INTERNAL_DRIVE);
808 swim_drive(base, EXTERNAL_DRIVE);
809 if (swim_readbit(base, DRIVE_PRESENT))
810 swim_add_floppy(swd, EXTERNAL_DRIVE);
811
812 /* register floppy drives */
813
814 err = register_blkdev(FLOPPY_MAJOR, "fd");
815 if (err) {
816 printk(KERN_ERR "Unable to get major %d for SWIM floppy\n",
817 FLOPPY_MAJOR);
818 return -EBUSY;
819 }
820
821 for (drive = 0; drive < swd->floppy_count; drive++) {
822 swd->unit[drive].disk = alloc_disk(1);
823 if (swd->unit[drive].disk == NULL) {
824 err = -ENOMEM;
825 goto exit_put_disks;
826 }
827 swd->unit[drive].swd = swd;
828 }
829
830 swd->queue = blk_init_queue(do_fd_request, &swd->lock);
831 if (!swd->queue) {
832 err = -ENOMEM;
833 goto exit_put_disks;
834 }
835
836 for (drive = 0; drive < swd->floppy_count; drive++) {
837 swd->unit[drive].disk->flags = GENHD_FL_REMOVABLE;
838 swd->unit[drive].disk->major = FLOPPY_MAJOR;
839 swd->unit[drive].disk->first_minor = drive;
840 sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive);
841 swd->unit[drive].disk->fops = &floppy_fops;
842 swd->unit[drive].disk->private_data = &swd->unit[drive];
843 swd->unit[drive].disk->queue = swd->queue;
844 set_capacity(swd->unit[drive].disk, 2880);
845 add_disk(swd->unit[drive].disk);
846 }
847
848 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
849 floppy_find, NULL, swd);
850
851 return 0;
852
853 exit_put_disks:
854 unregister_blkdev(FLOPPY_MAJOR, "fd");
855 while (drive--)
856 put_disk(swd->unit[drive].disk);
857 return err;
858 }
859
860 static int __devinit swim_probe(struct platform_device *dev)
861 {
862 struct resource *res;
863 struct swim __iomem *swim_base;
864 struct swim_priv *swd;
865 int ret;
866
867 res = platform_get_resource_byname(dev, IORESOURCE_MEM, "swim-regs");
868 if (!res) {
869 ret = -ENODEV;
870 goto out;
871 }
872
873 if (!request_mem_region(res->start, resource_size(res), CARDNAME)) {
874 ret = -EBUSY;
875 goto out;
876 }
877
878 swim_base = ioremap(res->start, resource_size(res));
879 if (!swim_base) {
880 return -ENOMEM;
881 goto out_release_io;
882 }
883
884 /* probe device */
885
886 set_swim_mode(swim_base, 1);
887 if (!get_swim_mode(swim_base)) {
888 printk(KERN_INFO "SWIM device not found !\n");
889 ret = -ENODEV;
890 goto out_iounmap;
891 }
892
893 /* set platform driver data */
894
895 swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL);
896 if (!swd) {
897 ret = -ENOMEM;
898 goto out_iounmap;
899 }
900 platform_set_drvdata(dev, swd);
901
902 swd->base = swim_base;
903
904 ret = swim_floppy_init(swd);
905 if (ret)
906 goto out_kfree;
907
908 return 0;
909
910 out_kfree:
911 platform_set_drvdata(dev, NULL);
912 kfree(swd);
913 out_iounmap:
914 iounmap(swim_base);
915 out_release_io:
916 release_mem_region(res->start, resource_size(res));
917 out:
918 return ret;
919 }
920
921 static int __devexit swim_remove(struct platform_device *dev)
922 {
923 struct swim_priv *swd = platform_get_drvdata(dev);
924 int drive;
925 struct resource *res;
926
927 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
928
929 for (drive = 0; drive < swd->floppy_count; drive++) {
930 del_gendisk(swd->unit[drive].disk);
931 put_disk(swd->unit[drive].disk);
932 }
933
934 unregister_blkdev(FLOPPY_MAJOR, "fd");
935
936 blk_cleanup_queue(swd->queue);
937
938 /* eject floppies */
939
940 for (drive = 0; drive < swd->floppy_count; drive++)
941 floppy_eject(&swd->unit[drive]);
942
943 iounmap(swd->base);
944
945 res = platform_get_resource_byname(dev, IORESOURCE_MEM, "swim-regs");
946 if (res)
947 release_mem_region(res->start, resource_size(res));
948
949 platform_set_drvdata(dev, NULL);
950 kfree(swd);
951
952 return 0;
953 }
954
955 static struct platform_driver swim_driver = {
956 .probe = swim_probe,
957 .remove = __devexit_p(swim_remove),
958 .driver = {
959 .name = CARDNAME,
960 .owner = THIS_MODULE,
961 },
962 };
963
964 static int __init swim_init(void)
965 {
966 printk(KERN_INFO "SWIM floppy driver %s\n", DRIVER_VERSION);
967
968 return platform_driver_register(&swim_driver);
969 }
970 module_init(swim_init);
971
972 static void __exit swim_exit(void)
973 {
974 platform_driver_unregister(&swim_driver);
975 }
976 module_exit(swim_exit);
977
978 MODULE_DESCRIPTION("Driver for SWIM floppy controller");
979 MODULE_LICENSE("GPL");
980 MODULE_AUTHOR("Laurent Vivier <laurent@lvivier.info>");
981 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);
982
|
This page was automatically generated by the
LXR engine.
|