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authorLaurent Vivier <laurent@lvivier.info>2008-11-15 10:10:10 -0500
committerGeert Uytterhoeven <geert@linux-m68k.org>2009-03-26 16:15:27 -0400
commit8852ecd97488249ca7fe2c0d3eb44cae95886881 (patch)
treebc23ec6db412733952809ebc5307535ed043c4a0 /drivers/block
parent7ad93b42bd135641ddc2c298f030132aca7aeca3 (diff)
m68k: mac - Add SWIM floppy support
It allows to read data from a floppy, but not to write to, and to eject the floppy (useful on our Mac without eject button). Signed-off-by: Laurent Vivier <Laurent@lvivier.info> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/Kconfig7
-rw-r--r--drivers/block/Makefile3
-rw-r--r--drivers/block/swim.c995
-rw-r--r--drivers/block/swim_asm.S247
4 files changed, 1252 insertions, 0 deletions
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index 0344a8a8321d..e7b8aa0cb47c 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -45,6 +45,13 @@ config MAC_FLOPPY
45 If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple) 45 If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple)
46 floppy controller, say Y here. Most commonly found in PowerMacs. 46 floppy controller, say Y here. Most commonly found in PowerMacs.
47 47
48config BLK_DEV_SWIM
49 tristate "Support for SWIM Macintosh floppy"
50 depends on M68K && MAC
51 help
52 You should select this option if you want floppy support
53 and you don't have a II, IIfx, Q900, Q950 or AV series.
54
48config AMIGA_Z2RAM 55config AMIGA_Z2RAM
49 tristate "Amiga Zorro II ramdisk support" 56 tristate "Amiga Zorro II ramdisk support"
50 depends on ZORRO 57 depends on ZORRO
diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index 87e120e0a79c..3145141cef72 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -6,6 +6,7 @@
6# 6#
7 7
8obj-$(CONFIG_MAC_FLOPPY) += swim3.o 8obj-$(CONFIG_MAC_FLOPPY) += swim3.o
9obj-$(CONFIG_BLK_DEV_SWIM) += swim_mod.o
9obj-$(CONFIG_BLK_DEV_FD) += floppy.o 10obj-$(CONFIG_BLK_DEV_FD) += floppy.o
10obj-$(CONFIG_AMIGA_FLOPPY) += amiflop.o 11obj-$(CONFIG_AMIGA_FLOPPY) += amiflop.o
11obj-$(CONFIG_PS3_DISK) += ps3disk.o 12obj-$(CONFIG_PS3_DISK) += ps3disk.o
@@ -33,3 +34,5 @@ obj-$(CONFIG_BLK_DEV_UB) += ub.o
33obj-$(CONFIG_BLK_DEV_HD) += hd.o 34obj-$(CONFIG_BLK_DEV_HD) += hd.o
34 35
35obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += xen-blkfront.o 36obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += xen-blkfront.o
37
38swim_mod-objs := swim.o swim_asm.o
diff --git a/drivers/block/swim.c b/drivers/block/swim.c
new file mode 100644
index 000000000000..d22cc3856937
--- /dev/null
+++ b/drivers/block/swim.c
@@ -0,0 +1,995 @@
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
32struct 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
45struct 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
70struct 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
158enum drive_location {
159 INTERNAL_DRIVE = 0x02,
160 EXTERNAL_DRIVE = 0x04,
161};
162
163enum media_type {
164 DD_MEDIA,
165 HD_MEDIA,
166};
167
168struct 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
198enum motor_action {
199 OFF,
200 ON,
201};
202
203enum head {
204 LOWER_HEAD = 0,
205 UPPER_HEAD = 1,
206};
207
208#define FD_MAX_UNIT 2
209
210struct 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
218extern int swim_read_sector_header(struct swim __iomem *base,
219 struct sector_header *header);
220extern int swim_read_sector_data(struct swim __iomem *base,
221 unsigned char *data);
222
223static 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
248static 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;
265is_iwm:
266 local_irq_restore(flags);
267 return 0;
268}
269
270static 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
279static 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
295static 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
308static 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
320static 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
341static 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
357static 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
367static 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
385static 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
407static 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
426static 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
443static 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
457static 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
494static 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 -1;
518 } while (ret != 512);
519
520 buffer += ret;
521 }
522
523 return 0;
524}
525
526static void redo_fd_request(struct request_queue *q)
527{
528 struct request *req;
529 struct floppy_state *fs;
530
531 while ((req = elv_next_request(q))) {
532
533 fs = req->rq_disk->private_data;
534 if (req->sector < 0 || req->sector >= fs->total_secs) {
535 end_request(req, 0);
536 continue;
537 }
538 if (req->current_nr_sectors == 0) {
539 end_request(req, 1);
540 continue;
541 }
542 if (!fs->disk_in) {
543 end_request(req, 0);
544 continue;
545 }
546 if (rq_data_dir(req) == WRITE) {
547 if (fs->write_protected) {
548 end_request(req, 0);
549 continue;
550 }
551 }
552 switch (rq_data_dir(req)) {
553 case WRITE:
554 /* NOT IMPLEMENTED */
555 end_request(req, 0);
556 break;
557 case READ:
558 if (floppy_read_sectors(fs, req->sector,
559 req->current_nr_sectors,
560 req->buffer)) {
561 end_request(req, 0);
562 continue;
563 }
564 req->nr_sectors -= req->current_nr_sectors;
565 req->sector += req->current_nr_sectors;
566 req->buffer += req->current_nr_sectors * 512;
567 end_request(req, 1);
568 break;
569 }
570 }
571}
572
573static void do_fd_request(struct request_queue *q)
574{
575 redo_fd_request(q);
576}
577
578static struct floppy_struct floppy_type[4] = {
579 { 0, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, NULL }, /* no testing */
580 { 720, 9, 1, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 360KB SS 3.5"*/
581 { 1440, 9, 2, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 720KB 3.5" */
582 { 2880, 18, 2, 80, 0, 0x1B, 0x00, 0xCF, 0x6C, NULL }, /* 1.44MB 3.5" */
583};
584
585static int get_floppy_geometry(struct floppy_state *fs, int type,
586 struct floppy_struct **g)
587{
588 if (type >= ARRAY_SIZE(floppy_type))
589 return -EINVAL;
590
591 if (type)
592 *g = &floppy_type[type];
593 else if (fs->type == HD_MEDIA) /* High-Density media */
594 *g = &floppy_type[3];
595 else if (fs->head_number == 2) /* double-sided */
596 *g = &floppy_type[2];
597 else
598 *g = &floppy_type[1];
599
600 return 0;
601}
602
603static void setup_medium(struct floppy_state *fs)
604{
605 struct swim __iomem *base = fs->swd->base;
606
607 if (swim_readbit(base, DISK_IN)) {
608 struct floppy_struct *g;
609 fs->disk_in = 1;
610 fs->write_protected = swim_readbit(base, WRITE_PROT);
611 fs->type = swim_readbit(base, ONEMEG_MEDIA);
612
613 if (swim_track00(base))
614 printk(KERN_ERR
615 "SWIM: cannot move floppy head to track 0\n");
616
617 swim_track00(base);
618
619 get_floppy_geometry(fs, 0, &g);
620 fs->total_secs = g->size;
621 fs->secpercyl = g->head * g->sect;
622 fs->secpertrack = g->sect;
623 fs->track = 0;
624 } else {
625 fs->disk_in = 0;
626 }
627}
628
629static int floppy_open(struct block_device *bdev, fmode_t mode)
630{
631 struct floppy_state *fs = bdev->bd_disk->private_data;
632 struct swim __iomem *base = fs->swd->base;
633 int err;
634
635 if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL))
636 return -EBUSY;
637
638 if (mode & FMODE_EXCL)
639 fs->ref_count = -1;
640 else
641 fs->ref_count++;
642
643 swim_write(base, setup, S_IBM_DRIVE | S_FCLK_DIV2);
644 udelay(10);
645 swim_drive(base, INTERNAL_DRIVE);
646 swim_motor(base, ON);
647 swim_action(base, SETMFM);
648 if (fs->ejected)
649 setup_medium(fs);
650 if (!fs->disk_in) {
651 err = -ENXIO;
652 goto out;
653 }
654
655 if (mode & FMODE_NDELAY)
656 return 0;
657
658 if (mode & (FMODE_READ|FMODE_WRITE)) {
659 check_disk_change(bdev);
660 if ((mode & FMODE_WRITE) && fs->write_protected) {
661 err = -EROFS;
662 goto out;
663 }
664 }
665 return 0;
666out:
667 if (fs->ref_count < 0)
668 fs->ref_count = 0;
669 else if (fs->ref_count > 0)
670 --fs->ref_count;
671
672 if (fs->ref_count == 0)
673 swim_motor(base, OFF);
674 return err;
675}
676
677static int floppy_release(struct gendisk *disk, fmode_t mode)
678{
679 struct floppy_state *fs = disk->private_data;
680 struct swim __iomem *base = fs->swd->base;
681
682 if (fs->ref_count < 0)
683 fs->ref_count = 0;
684 else if (fs->ref_count > 0)
685 --fs->ref_count;
686
687 if (fs->ref_count == 0)
688 swim_motor(base, OFF);
689
690 return 0;
691}
692
693static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
694 unsigned int cmd, unsigned long param)
695{
696 struct floppy_state *fs = bdev->bd_disk->private_data;
697 int err;
698
699 if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))
700 return -EPERM;
701
702 switch (cmd) {
703 case FDEJECT:
704 if (fs->ref_count != 1)
705 return -EBUSY;
706 err = floppy_eject(fs);
707 return err;
708
709 case FDGETPRM:
710 if (copy_to_user((void __user *) param, (void *) &floppy_type,
711 sizeof(struct floppy_struct)))
712 return -EFAULT;
713 break;
714
715 default:
716 printk(KERN_DEBUG "SWIM floppy_ioctl: unknown cmd %d\n",
717 cmd);
718 return -ENOSYS;
719 }
720 return 0;
721}
722
723static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
724{
725 struct floppy_state *fs = bdev->bd_disk->private_data;
726 struct floppy_struct *g;
727 int ret;
728
729 ret = get_floppy_geometry(fs, 0, &g);
730 if (ret)
731 return ret;
732
733 geo->heads = g->head;
734 geo->sectors = g->sect;
735 geo->cylinders = g->track;
736
737 return 0;
738}
739
740static int floppy_check_change(struct gendisk *disk)
741{
742 struct floppy_state *fs = disk->private_data;
743
744 return fs->ejected;
745}
746
747static int floppy_revalidate(struct gendisk *disk)
748{
749 struct floppy_state *fs = disk->private_data;
750 struct swim __iomem *base = fs->swd->base;
751
752 swim_drive(base, fs->location);
753
754 if (fs->ejected)
755 setup_medium(fs);
756
757 if (!fs->disk_in)
758 swim_motor(base, OFF);
759 else
760 fs->ejected = 0;
761
762 return !fs->disk_in;
763}
764
765static struct block_device_operations floppy_fops = {
766 .owner = THIS_MODULE,
767 .open = floppy_open,
768 .release = floppy_release,
769 .locked_ioctl = floppy_ioctl,
770 .getgeo = floppy_getgeo,
771 .media_changed = floppy_check_change,
772 .revalidate_disk = floppy_revalidate,
773};
774
775static struct kobject *floppy_find(dev_t dev, int *part, void *data)
776{
777 struct swim_priv *swd = data;
778 int drive = (*part & 3);
779
780 if (drive > swd->floppy_count)
781 return NULL;
782
783 *part = 0;
784 return get_disk(swd->unit[drive].disk);
785}
786
787static int __devinit swim_add_floppy(struct swim_priv *swd,
788 enum drive_location location)
789{
790 struct floppy_state *fs = &swd->unit[swd->floppy_count];
791 struct swim __iomem *base = swd->base;
792
793 fs->location = location;
794
795 swim_drive(base, location);
796
797 swim_motor(base, OFF);
798
799 if (swim_readbit(base, SINGLE_SIDED))
800 fs->head_number = 1;
801 else
802 fs->head_number = 2;
803 fs->ref_count = 0;
804 fs->ejected = 1;
805
806 swd->floppy_count++;
807
808 return 0;
809}
810
811static int __devinit swim_floppy_init(struct swim_priv *swd)
812{
813 int err;
814 int drive;
815 struct swim __iomem *base = swd->base;
816
817 /* scan floppy drives */
818
819 swim_drive(base, INTERNAL_DRIVE);
820 if (swim_readbit(base, DRIVE_PRESENT))
821 swim_add_floppy(swd, INTERNAL_DRIVE);
822 swim_drive(base, EXTERNAL_DRIVE);
823 if (swim_readbit(base, DRIVE_PRESENT))
824 swim_add_floppy(swd, EXTERNAL_DRIVE);
825
826 /* register floppy drives */
827
828 err = register_blkdev(FLOPPY_MAJOR, "fd");
829 if (err) {
830 printk(KERN_ERR "Unable to get major %d for SWIM floppy\n",
831 FLOPPY_MAJOR);
832 return -EBUSY;
833 }
834
835 for (drive = 0; drive < swd->floppy_count; drive++) {
836 swd->unit[drive].disk = alloc_disk(1);
837 if (swd->unit[drive].disk == NULL) {
838 err = -ENOMEM;
839 goto exit_put_disks;
840 }
841 swd->unit[drive].swd = swd;
842 }
843
844 swd->queue = blk_init_queue(do_fd_request, &swd->lock);
845 if (!swd->queue) {
846 err = -ENOMEM;
847 goto exit_put_disks;
848 }
849
850 for (drive = 0; drive < swd->floppy_count; drive++) {
851 swd->unit[drive].disk->flags = GENHD_FL_REMOVABLE;
852 swd->unit[drive].disk->major = FLOPPY_MAJOR;
853 swd->unit[drive].disk->first_minor = drive;
854 sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive);
855 swd->unit[drive].disk->fops = &floppy_fops;
856 swd->unit[drive].disk->private_data = &swd->unit[drive];
857 swd->unit[drive].disk->queue = swd->queue;
858 set_capacity(swd->unit[drive].disk, 2880);
859 add_disk(swd->unit[drive].disk);
860 }
861
862 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
863 floppy_find, NULL, swd);
864
865 return 0;
866
867exit_put_disks:
868 unregister_blkdev(FLOPPY_MAJOR, "fd");
869 while (drive--)
870 put_disk(swd->unit[drive].disk);
871 return err;
872}
873
874static int __devinit swim_probe(struct platform_device *dev)
875{
876 struct resource *res;
877 struct swim __iomem *swim_base;
878 struct swim_priv *swd;
879 int ret;
880
881 res = platform_get_resource_byname(dev, IORESOURCE_MEM, "swim-regs");
882 if (!res) {
883 ret = -ENODEV;
884 goto out;
885 }
886
887 if (!request_mem_region(res->start, resource_size(res), CARDNAME)) {
888 ret = -EBUSY;
889 goto out;
890 }
891
892 swim_base = ioremap(res->start, resource_size(res));
893 if (!swim_base) {
894 return -ENOMEM;
895 goto out_release_io;
896 }
897
898 /* probe device */
899
900 set_swim_mode(swim_base, 1);
901 if (!get_swim_mode(swim_base)) {
902 printk(KERN_INFO "SWIM device not found !\n");
903 ret = -ENODEV;
904 goto out_iounmap;
905 }
906
907 /* set platform driver data */
908
909 swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL);
910 if (!swd) {
911 ret = -ENOMEM;
912 goto out_iounmap;
913 }
914 platform_set_drvdata(dev, swd);
915
916 swd->base = swim_base;
917
918 ret = swim_floppy_init(swd);
919 if (ret)
920 goto out_kfree;
921
922 return 0;
923
924out_kfree:
925 platform_set_drvdata(dev, NULL);
926 kfree(swd);
927out_iounmap:
928 iounmap(swim_base);
929out_release_io:
930 release_mem_region(res->start, resource_size(res));
931out:
932 return ret;
933}
934
935static int __devexit swim_remove(struct platform_device *dev)
936{
937 struct swim_priv *swd = platform_get_drvdata(dev);
938 int drive;
939 struct resource *res;
940
941 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
942
943 for (drive = 0; drive < swd->floppy_count; drive++) {
944 del_gendisk(swd->unit[drive].disk);
945 put_disk(swd->unit[drive].disk);
946 }
947
948 unregister_blkdev(FLOPPY_MAJOR, "fd");
949
950 blk_cleanup_queue(swd->queue);
951
952 /* eject floppies */
953
954 for (drive = 0; drive < swd->floppy_count; drive++)
955 floppy_eject(&swd->unit[drive]);
956
957 iounmap(swd->base);
958
959 res = platform_get_resource_byname(dev, IORESOURCE_MEM, "swim-regs");
960 if (res)
961 release_mem_region(res->start, resource_size(res));
962
963 platform_set_drvdata(dev, NULL);
964 kfree(swd);
965
966 return 0;
967}
968
969static struct platform_driver swim_driver = {
970 .probe = swim_probe,
971 .remove = __devexit_p(swim_remove),
972 .driver = {
973 .name = CARDNAME,
974 .owner = THIS_MODULE,
975 },
976};
977
978static int __init swim_init(void)
979{
980 printk(KERN_INFO "SWIM floppy driver %s\n", DRIVER_VERSION);
981
982 return platform_driver_register(&swim_driver);
983}
984module_init(swim_init);
985
986static void __exit swim_exit(void)
987{
988 platform_driver_unregister(&swim_driver);
989}
990module_exit(swim_exit);
991
992MODULE_DESCRIPTION("Driver for SWIM floppy controller");
993MODULE_LICENSE("GPL");
994MODULE_AUTHOR("Laurent Vivier <laurent@lvivier.info>");
995MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);
diff --git a/drivers/block/swim_asm.S b/drivers/block/swim_asm.S
new file mode 100644
index 000000000000..c9668206857b
--- /dev/null
+++ b/drivers/block/swim_asm.S
@@ -0,0 +1,247 @@
1/*
2 * low-level functions for the SWIM floppy controller
3 *
4 * needs assembly language because is very timing dependent
5 * this controller exists only on macintosh 680x0 based
6 *
7 * Copyright (C) 2004,2008 Laurent Vivier <Laurent@lvivier.info>
8 *
9 * based on Alastair Bridgewater SWIM analysis, 2001
10 * based on netBSD IWM driver (c) 1997, 1998 Hauke Fath.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 *
17 * 2004-08-21 (lv) - Initial implementation
18 * 2008-11-05 (lv) - add get_swim_mode
19 */
20
21 .equ write_data, 0x0000
22 .equ write_mark, 0x0200
23 .equ write_CRC, 0x0400
24 .equ write_parameter,0x0600
25 .equ write_phase, 0x0800
26 .equ write_setup, 0x0a00
27 .equ write_mode0, 0x0c00
28 .equ write_mode1, 0x0e00
29 .equ read_data, 0x1000
30 .equ read_mark, 0x1200
31 .equ read_error, 0x1400
32 .equ read_parameter, 0x1600
33 .equ read_phase, 0x1800
34 .equ read_setup, 0x1a00
35 .equ read_status, 0x1c00
36 .equ read_handshake, 0x1e00
37
38 .equ o_side, 0
39 .equ o_track, 1
40 .equ o_sector, 2
41 .equ o_size, 3
42 .equ o_crc0, 4
43 .equ o_crc1, 5
44
45 .equ seek_time, 30000
46 .equ max_retry, 40
47 .equ sector_size, 512
48
49 .global swim_read_sector_header
50swim_read_sector_header:
51 link %a6, #0
52 moveml %d1-%d5/%a0-%a4,%sp@-
53 movel %a6@(0x0c), %a4
54 bsr mfm_read_addrmark
55 moveml %sp@+, %d1-%d5/%a0-%a4
56 unlk %a6
57 rts
58
59sector_address_mark:
60 .byte 0xa1, 0xa1, 0xa1, 0xfe
61sector_data_mark:
62 .byte 0xa1, 0xa1, 0xa1, 0xfb
63
64mfm_read_addrmark:
65 movel %a6@(0x08), %a3
66 lea %a3@(read_handshake), %a2
67 lea %a3@(read_mark), %a3
68 moveq #-1, %d0
69 movew #seek_time, %d2
70
71wait_header_init:
72 tstb %a3@(read_error - read_mark)
73 moveb #0x18, %a3@(write_mode0 - read_mark)
74 moveb #0x01, %a3@(write_mode1 - read_mark)
75 moveb #0x01, %a3@(write_mode0 - read_mark)
76 tstb %a3@(read_error - read_mark)
77 moveb #0x08, %a3@(write_mode1 - read_mark)
78
79 lea sector_address_mark, %a0
80 moveq #3, %d1
81
82wait_addr_mark_byte:
83
84 tstb %a2@
85 dbmi %d2, wait_addr_mark_byte
86 bpl header_exit
87
88 moveb %a3@, %d3
89 cmpb %a0@+, %d3
90 dbne %d1, wait_addr_mark_byte
91 bne wait_header_init
92
93 moveq #max_retry, %d2
94
95amark0: tstb %a2@
96 dbmi %d2, amark0
97 bpl signal_nonyb
98
99 moveb %a3@, %a4@(o_track)
100
101 moveq #max_retry, %d2
102
103amark1: tstb %a2@
104 dbmi %d2, amark1
105 bpl signal_nonyb
106
107 moveb %a3@, %a4@(o_side)
108
109 moveq #max_retry, %d2
110
111amark2: tstb %a2@
112 dbmi %d2, amark2
113 bpl signal_nonyb
114
115 moveb %a3@, %a4@(o_sector)
116
117 moveq #max_retry, %d2
118
119amark3: tstb %a2@
120 dbmi %d2, amark3
121 bpl signal_nonyb
122
123 moveb %a3@, %a4@(o_size)
124
125 moveq #max_retry, %d2
126
127crc0: tstb %a2@
128 dbmi %d2, crc0
129 bpl signal_nonyb
130
131 moveb %a3@, %a4@(o_crc0)
132
133 moveq #max_retry, %d2
134
135crc1: tstb %a2@
136 dbmi %d2, crc1
137 bpl signal_nonyb
138
139 moveb %a3@, %a4@(o_crc1)
140
141 tstb %a3@(read_error - read_mark)
142
143header_exit:
144 moveq #0, %d0
145 moveb #0x18, %a3@(write_mode0 - read_mark)
146 rts
147signal_nonyb:
148 moveq #-1, %d0
149 moveb #0x18, %a3@(write_mode0 - read_mark)
150 rts
151
152 .global swim_read_sector_data
153swim_read_sector_data:
154 link %a6, #0
155 moveml %d1-%d5/%a0-%a5,%sp@-
156 movel %a6@(0x0c), %a4
157 bsr mfm_read_data
158 moveml %sp@+, %d1-%d5/%a0-%a5
159 unlk %a6
160 rts
161
162mfm_read_data:
163 movel %a6@(0x08), %a3
164 lea %a3@(read_handshake), %a2
165 lea %a3@(read_data), %a5
166 lea %a3@(read_mark), %a3
167 movew #seek_time, %d2
168
169wait_data_init:
170 tstb %a3@(read_error - read_mark)
171 moveb #0x18, %a3@(write_mode0 - read_mark)
172 moveb #0x01, %a3@(write_mode1 - read_mark)
173 moveb #0x01, %a3@(write_mode0 - read_mark)
174 tstb %a3@(read_error - read_mark)
175 moveb #0x08, %a3@(write_mode1 - read_mark)
176
177 lea sector_data_mark, %a0
178 moveq #3, %d1
179
180 /* wait data address mark */
181
182wait_data_mark_byte:
183
184 tstb %a2@
185 dbmi %d2, wait_data_mark_byte
186 bpl data_exit
187
188 moveb %a3@, %d3
189 cmpb %a0@+, %d3
190 dbne %d1, wait_data_mark_byte
191 bne wait_data_init
192
193 /* read data */
194
195 tstb %a3@(read_error - read_mark)
196
197 movel #sector_size-1, %d4 /* sector size */
198read_new_data:
199 movew #max_retry, %d2
200read_data_loop:
201 moveb %a2@, %d5
202 andb #0xc0, %d5
203 dbne %d2, read_data_loop
204 beq data_exit
205 moveb %a5@, %a4@+
206 andb #0x40, %d5
207 dbne %d4, read_new_data
208 beq exit_loop
209 moveb %a5@, %a4@+
210 dbra %d4, read_new_data
211exit_loop:
212
213 /* read CRC */
214
215 movew #max_retry, %d2
216data_crc0:
217
218 tstb %a2@
219 dbmi %d2, data_crc0
220 bpl data_exit
221
222 moveb %a3@, %d5
223
224 moveq #max_retry, %d2
225
226data_crc1:
227
228 tstb %a2@
229 dbmi %d2, data_crc1
230 bpl data_exit
231
232 moveb %a3@, %d5
233
234 tstb %a3@(read_error - read_mark)
235
236 moveb #0x18, %a3@(write_mode0 - read_mark)
237
238 /* return number of bytes read */
239
240 movel #sector_size, %d0
241 addw #1, %d4
242 subl %d4, %d0
243 rts
244data_exit:
245 moveb #0x18, %a3@(write_mode0 - read_mark)
246 moveq #-1, %d0
247 rts
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-12 19:18:38 -0500