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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
8852ecd9 LV |
2 | /* |
3 | * Driver for SWIM (Sander Woz Integrated Machine) floppy controller | |
4 | * | |
5 | * Copyright (C) 2004,2008 Laurent Vivier <Laurent@lvivier.info> | |
6 | * | |
7 | * based on Alastair Bridgewater SWIM analysis, 2001 | |
8 | * based on SWIM3 driver (c) Paul Mackerras, 1996 | |
9 | * based on netBSD IWM driver (c) 1997, 1998 Hauke Fath. | |
10 | * | |
8852ecd9 LV |
11 | * 2004-08-21 (lv) - Initial implementation |
12 | * 2008-10-30 (lv) - Port to 2.6 | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/fd.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
e3896d77 | 18 | #include <linux/blk-mq.h> |
a9f215d7 | 19 | #include <linux/major.h> |
2a48fc0a | 20 | #include <linux/mutex.h> |
8852ecd9 LV |
21 | #include <linux/hdreg.h> |
22 | #include <linux/kernel.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/platform_device.h> | |
25 | ||
8852ecd9 LV |
26 | #include <asm/mac_via.h> |
27 | ||
28 | #define CARDNAME "swim" | |
29 | ||
30 | struct sector_header { | |
31 | unsigned char side; | |
32 | unsigned char track; | |
33 | unsigned char sector; | |
34 | unsigned char size; | |
35 | unsigned char crc0; | |
36 | unsigned char crc1; | |
37 | } __attribute__((packed)); | |
38 | ||
39 | #define DRIVER_VERSION "Version 0.2 (2008-10-30)" | |
40 | ||
41 | #define REG(x) unsigned char x, x ## _pad[0x200 - 1]; | |
42 | ||
43 | struct swim { | |
44 | REG(write_data) | |
45 | REG(write_mark) | |
46 | REG(write_CRC) | |
47 | REG(write_parameter) | |
48 | REG(write_phase) | |
49 | REG(write_setup) | |
50 | REG(write_mode0) | |
51 | REG(write_mode1) | |
52 | ||
53 | REG(read_data) | |
54 | REG(read_mark) | |
55 | REG(read_error) | |
56 | REG(read_parameter) | |
57 | REG(read_phase) | |
58 | REG(read_setup) | |
59 | REG(read_status) | |
60 | REG(read_handshake) | |
61 | } __attribute__((packed)); | |
62 | ||
63 | #define swim_write(base, reg, v) out_8(&(base)->write_##reg, (v)) | |
64 | #define swim_read(base, reg) in_8(&(base)->read_##reg) | |
65 | ||
66 | /* IWM registers */ | |
67 | ||
68 | struct iwm { | |
69 | REG(ph0L) | |
70 | REG(ph0H) | |
71 | REG(ph1L) | |
72 | REG(ph1H) | |
73 | REG(ph2L) | |
74 | REG(ph2H) | |
75 | REG(ph3L) | |
76 | REG(ph3H) | |
77 | REG(mtrOff) | |
78 | REG(mtrOn) | |
79 | REG(intDrive) | |
80 | REG(extDrive) | |
81 | REG(q6L) | |
82 | REG(q6H) | |
83 | REG(q7L) | |
84 | REG(q7H) | |
85 | } __attribute__((packed)); | |
86 | ||
87 | #define iwm_write(base, reg, v) out_8(&(base)->reg, (v)) | |
88 | #define iwm_read(base, reg) in_8(&(base)->reg) | |
89 | ||
90 | /* bits in phase register */ | |
91 | ||
92 | #define SEEK_POSITIVE 0x070 | |
93 | #define SEEK_NEGATIVE 0x074 | |
94 | #define STEP 0x071 | |
95 | #define MOTOR_ON 0x072 | |
96 | #define MOTOR_OFF 0x076 | |
97 | #define INDEX 0x073 | |
98 | #define EJECT 0x077 | |
99 | #define SETMFM 0x171 | |
100 | #define SETGCR 0x175 | |
101 | ||
102 | #define RELAX 0x033 | |
103 | #define LSTRB 0x008 | |
104 | ||
105 | #define CA_MASK 0x077 | |
106 | ||
107 | /* Select values for swim_select and swim_readbit */ | |
108 | ||
109 | #define READ_DATA_0 0x074 | |
56a1c5ee | 110 | #define ONEMEG_DRIVE 0x075 |
8852ecd9 LV |
111 | #define SINGLE_SIDED 0x076 |
112 | #define DRIVE_PRESENT 0x077 | |
113 | #define DISK_IN 0x170 | |
114 | #define WRITE_PROT 0x171 | |
115 | #define TRACK_ZERO 0x172 | |
116 | #define TACHO 0x173 | |
117 | #define READ_DATA_1 0x174 | |
56a1c5ee | 118 | #define GCR_MODE 0x175 |
8852ecd9 | 119 | #define SEEK_COMPLETE 0x176 |
56a1c5ee | 120 | #define TWOMEG_MEDIA 0x177 |
8852ecd9 LV |
121 | |
122 | /* Bits in handshake register */ | |
123 | ||
124 | #define MARK_BYTE 0x01 | |
125 | #define CRC_ZERO 0x02 | |
126 | #define RDDATA 0x04 | |
127 | #define SENSE 0x08 | |
128 | #define MOTEN 0x10 | |
129 | #define ERROR 0x20 | |
130 | #define DAT2BYTE 0x40 | |
131 | #define DAT1BYTE 0x80 | |
132 | ||
133 | /* bits in setup register */ | |
134 | ||
135 | #define S_INV_WDATA 0x01 | |
136 | #define S_3_5_SELECT 0x02 | |
137 | #define S_GCR 0x04 | |
138 | #define S_FCLK_DIV2 0x08 | |
139 | #define S_ERROR_CORR 0x10 | |
140 | #define S_IBM_DRIVE 0x20 | |
141 | #define S_GCR_WRITE 0x40 | |
142 | #define S_TIMEOUT 0x80 | |
143 | ||
144 | /* bits in mode register */ | |
145 | ||
146 | #define CLFIFO 0x01 | |
147 | #define ENBL1 0x02 | |
148 | #define ENBL2 0x04 | |
149 | #define ACTION 0x08 | |
150 | #define WRITE_MODE 0x10 | |
151 | #define HEDSEL 0x20 | |
152 | #define MOTON 0x80 | |
153 | ||
154 | /*----------------------------------------------------------------------------*/ | |
155 | ||
156 | enum drive_location { | |
157 | INTERNAL_DRIVE = 0x02, | |
158 | EXTERNAL_DRIVE = 0x04, | |
159 | }; | |
160 | ||
161 | enum media_type { | |
162 | DD_MEDIA, | |
163 | HD_MEDIA, | |
164 | }; | |
165 | ||
166 | struct floppy_state { | |
167 | ||
168 | /* physical properties */ | |
169 | ||
170 | enum drive_location location; /* internal or external drive */ | |
171 | int head_number; /* single- or double-sided drive */ | |
172 | ||
173 | /* media */ | |
174 | ||
175 | int disk_in; | |
176 | int ejected; | |
177 | enum media_type type; | |
178 | int write_protected; | |
179 | ||
180 | int total_secs; | |
181 | int secpercyl; | |
182 | int secpertrack; | |
183 | ||
184 | /* in-use information */ | |
185 | ||
186 | int track; | |
187 | int ref_count; | |
188 | ||
189 | struct gendisk *disk; | |
e3896d77 | 190 | struct blk_mq_tag_set tag_set; |
8852ecd9 LV |
191 | |
192 | /* parent controller */ | |
193 | ||
194 | struct swim_priv *swd; | |
195 | }; | |
196 | ||
197 | enum motor_action { | |
198 | OFF, | |
199 | ON, | |
200 | }; | |
201 | ||
202 | enum head { | |
203 | LOWER_HEAD = 0, | |
204 | UPPER_HEAD = 1, | |
205 | }; | |
206 | ||
207 | #define FD_MAX_UNIT 2 | |
208 | ||
209 | struct swim_priv { | |
210 | struct swim __iomem *base; | |
211 | spinlock_t lock; | |
8852ecd9 LV |
212 | int floppy_count; |
213 | struct floppy_state unit[FD_MAX_UNIT]; | |
214 | }; | |
215 | ||
216 | extern int swim_read_sector_header(struct swim __iomem *base, | |
217 | struct sector_header *header); | |
218 | extern int swim_read_sector_data(struct swim __iomem *base, | |
219 | unsigned char *data); | |
220 | ||
2a48fc0a | 221 | static DEFINE_MUTEX(swim_mutex); |
8852ecd9 LV |
222 | static inline void set_swim_mode(struct swim __iomem *base, int enable) |
223 | { | |
224 | struct iwm __iomem *iwm_base; | |
225 | unsigned long flags; | |
226 | ||
227 | if (!enable) { | |
228 | swim_write(base, mode0, 0xf8); | |
229 | return; | |
230 | } | |
231 | ||
232 | iwm_base = (struct iwm __iomem *)base; | |
233 | local_irq_save(flags); | |
234 | ||
235 | iwm_read(iwm_base, q7L); | |
236 | iwm_read(iwm_base, mtrOff); | |
237 | iwm_read(iwm_base, q6H); | |
238 | ||
239 | iwm_write(iwm_base, q7H, 0x57); | |
240 | iwm_write(iwm_base, q7H, 0x17); | |
241 | iwm_write(iwm_base, q7H, 0x57); | |
242 | iwm_write(iwm_base, q7H, 0x57); | |
243 | ||
244 | local_irq_restore(flags); | |
245 | } | |
246 | ||
247 | static inline int get_swim_mode(struct swim __iomem *base) | |
248 | { | |
249 | unsigned long flags; | |
250 | ||
251 | local_irq_save(flags); | |
252 | ||
253 | swim_write(base, phase, 0xf5); | |
254 | if (swim_read(base, phase) != 0xf5) | |
255 | goto is_iwm; | |
256 | swim_write(base, phase, 0xf6); | |
257 | if (swim_read(base, phase) != 0xf6) | |
258 | goto is_iwm; | |
259 | swim_write(base, phase, 0xf7); | |
260 | if (swim_read(base, phase) != 0xf7) | |
261 | goto is_iwm; | |
262 | local_irq_restore(flags); | |
263 | return 1; | |
264 | is_iwm: | |
265 | local_irq_restore(flags); | |
266 | return 0; | |
267 | } | |
268 | ||
269 | static inline void swim_select(struct swim __iomem *base, int sel) | |
270 | { | |
271 | swim_write(base, phase, RELAX); | |
272 | ||
273 | via1_set_head(sel & 0x100); | |
274 | ||
275 | swim_write(base, phase, sel & CA_MASK); | |
276 | } | |
277 | ||
278 | static inline void swim_action(struct swim __iomem *base, int action) | |
279 | { | |
280 | unsigned long flags; | |
281 | ||
282 | local_irq_save(flags); | |
283 | ||
284 | swim_select(base, action); | |
285 | udelay(1); | |
286 | swim_write(base, phase, (LSTRB<<4) | LSTRB); | |
287 | udelay(1); | |
288 | swim_write(base, phase, (LSTRB<<4) | ((~LSTRB) & 0x0F)); | |
289 | udelay(1); | |
290 | ||
291 | local_irq_restore(flags); | |
292 | } | |
293 | ||
294 | static inline int swim_readbit(struct swim __iomem *base, int bit) | |
295 | { | |
296 | int stat; | |
297 | ||
298 | swim_select(base, bit); | |
299 | ||
300 | udelay(10); | |
301 | ||
302 | stat = swim_read(base, handshake); | |
303 | ||
304 | return (stat & SENSE) == 0; | |
305 | } | |
306 | ||
307 | static inline void swim_drive(struct swim __iomem *base, | |
308 | enum drive_location location) | |
309 | { | |
310 | if (location == INTERNAL_DRIVE) { | |
311 | swim_write(base, mode0, EXTERNAL_DRIVE); /* clear drive 1 bit */ | |
312 | swim_write(base, mode1, INTERNAL_DRIVE); /* set drive 0 bit */ | |
313 | } else if (location == EXTERNAL_DRIVE) { | |
314 | swim_write(base, mode0, INTERNAL_DRIVE); /* clear drive 0 bit */ | |
315 | swim_write(base, mode1, EXTERNAL_DRIVE); /* set drive 1 bit */ | |
316 | } | |
317 | } | |
318 | ||
319 | static inline void swim_motor(struct swim __iomem *base, | |
320 | enum motor_action action) | |
321 | { | |
322 | if (action == ON) { | |
323 | int i; | |
324 | ||
325 | swim_action(base, MOTOR_ON); | |
326 | ||
327 | for (i = 0; i < 2*HZ; i++) { | |
328 | swim_select(base, RELAX); | |
329 | if (swim_readbit(base, MOTOR_ON)) | |
330 | break; | |
c6516565 | 331 | set_current_state(TASK_INTERRUPTIBLE); |
8852ecd9 LV |
332 | schedule_timeout(1); |
333 | } | |
334 | } else if (action == OFF) { | |
335 | swim_action(base, MOTOR_OFF); | |
336 | swim_select(base, RELAX); | |
337 | } | |
338 | } | |
339 | ||
340 | static inline void swim_eject(struct swim __iomem *base) | |
341 | { | |
342 | int i; | |
343 | ||
344 | swim_action(base, EJECT); | |
345 | ||
346 | for (i = 0; i < 2*HZ; i++) { | |
347 | swim_select(base, RELAX); | |
348 | if (!swim_readbit(base, DISK_IN)) | |
349 | break; | |
c6516565 | 350 | set_current_state(TASK_INTERRUPTIBLE); |
8852ecd9 LV |
351 | schedule_timeout(1); |
352 | } | |
353 | swim_select(base, RELAX); | |
354 | } | |
355 | ||
356 | static inline void swim_head(struct swim __iomem *base, enum head head) | |
357 | { | |
358 | /* wait drive is ready */ | |
359 | ||
360 | if (head == UPPER_HEAD) | |
361 | swim_select(base, READ_DATA_1); | |
362 | else if (head == LOWER_HEAD) | |
363 | swim_select(base, READ_DATA_0); | |
364 | } | |
365 | ||
366 | static inline int swim_step(struct swim __iomem *base) | |
367 | { | |
368 | int wait; | |
369 | ||
370 | swim_action(base, STEP); | |
371 | ||
372 | for (wait = 0; wait < HZ; wait++) { | |
373 | ||
c6516565 | 374 | set_current_state(TASK_INTERRUPTIBLE); |
8852ecd9 LV |
375 | schedule_timeout(1); |
376 | ||
377 | swim_select(base, RELAX); | |
378 | if (!swim_readbit(base, STEP)) | |
379 | return 0; | |
380 | } | |
381 | return -1; | |
382 | } | |
383 | ||
384 | static inline int swim_track00(struct swim __iomem *base) | |
385 | { | |
386 | int try; | |
387 | ||
388 | swim_action(base, SEEK_NEGATIVE); | |
389 | ||
390 | for (try = 0; try < 100; try++) { | |
391 | ||
392 | swim_select(base, RELAX); | |
393 | if (swim_readbit(base, TRACK_ZERO)) | |
394 | break; | |
395 | ||
396 | if (swim_step(base)) | |
397 | return -1; | |
398 | } | |
399 | ||
400 | if (swim_readbit(base, TRACK_ZERO)) | |
401 | return 0; | |
402 | ||
403 | return -1; | |
404 | } | |
405 | ||
406 | static inline int swim_seek(struct swim __iomem *base, int step) | |
407 | { | |
408 | if (step == 0) | |
409 | return 0; | |
410 | ||
411 | if (step < 0) { | |
412 | swim_action(base, SEEK_NEGATIVE); | |
413 | step = -step; | |
414 | } else | |
415 | swim_action(base, SEEK_POSITIVE); | |
416 | ||
417 | for ( ; step > 0; step--) { | |
418 | if (swim_step(base)) | |
419 | return -1; | |
420 | } | |
421 | ||
422 | return 0; | |
423 | } | |
424 | ||
425 | static inline int swim_track(struct floppy_state *fs, int track) | |
426 | { | |
427 | struct swim __iomem *base = fs->swd->base; | |
428 | int ret; | |
429 | ||
430 | ret = swim_seek(base, track - fs->track); | |
431 | ||
432 | if (ret == 0) | |
433 | fs->track = track; | |
434 | else { | |
435 | swim_track00(base); | |
436 | fs->track = 0; | |
437 | } | |
438 | ||
439 | return ret; | |
440 | } | |
441 | ||
442 | static int floppy_eject(struct floppy_state *fs) | |
443 | { | |
444 | struct swim __iomem *base = fs->swd->base; | |
445 | ||
446 | swim_drive(base, fs->location); | |
447 | swim_motor(base, OFF); | |
448 | swim_eject(base); | |
449 | ||
450 | fs->disk_in = 0; | |
451 | fs->ejected = 1; | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
456 | static inline int swim_read_sector(struct floppy_state *fs, | |
457 | int side, int track, | |
458 | int sector, unsigned char *buffer) | |
459 | { | |
460 | struct swim __iomem *base = fs->swd->base; | |
461 | unsigned long flags; | |
462 | struct sector_header header; | |
463 | int ret = -1; | |
464 | short i; | |
465 | ||
466 | swim_track(fs, track); | |
467 | ||
468 | swim_write(base, mode1, MOTON); | |
469 | swim_head(base, side); | |
470 | swim_write(base, mode0, side); | |
471 | ||
472 | local_irq_save(flags); | |
473 | for (i = 0; i < 36; i++) { | |
474 | ret = swim_read_sector_header(base, &header); | |
475 | if (!ret && (header.sector == sector)) { | |
476 | /* found */ | |
477 | ||
478 | ret = swim_read_sector_data(base, buffer); | |
479 | break; | |
480 | } | |
481 | } | |
482 | local_irq_restore(flags); | |
483 | ||
484 | swim_write(base, mode0, MOTON); | |
485 | ||
486 | if ((header.side != side) || (header.track != track) || | |
487 | (header.sector != sector)) | |
488 | return 0; | |
489 | ||
490 | return ret; | |
491 | } | |
492 | ||
2a842aca | 493 | static blk_status_t floppy_read_sectors(struct floppy_state *fs, |
8852ecd9 LV |
494 | int req_sector, int sectors_nb, |
495 | unsigned char *buffer) | |
496 | { | |
497 | struct swim __iomem *base = fs->swd->base; | |
498 | int ret; | |
499 | int side, track, sector; | |
500 | int i, try; | |
501 | ||
502 | ||
503 | swim_drive(base, fs->location); | |
504 | for (i = req_sector; i < req_sector + sectors_nb; i++) { | |
505 | int x; | |
506 | track = i / fs->secpercyl; | |
507 | x = i % fs->secpercyl; | |
508 | side = x / fs->secpertrack; | |
509 | sector = x % fs->secpertrack + 1; | |
510 | ||
511 | try = 5; | |
512 | do { | |
513 | ret = swim_read_sector(fs, side, track, sector, | |
514 | buffer); | |
515 | if (try-- == 0) | |
2a842aca | 516 | return BLK_STS_IOERR; |
8852ecd9 LV |
517 | } while (ret != 512); |
518 | ||
519 | buffer += ret; | |
520 | } | |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
e3896d77 OS |
525 | static blk_status_t swim_queue_rq(struct blk_mq_hw_ctx *hctx, |
526 | const struct blk_mq_queue_data *bd) | |
8852ecd9 | 527 | { |
e3896d77 OS |
528 | struct floppy_state *fs = hctx->queue->queuedata; |
529 | struct swim_priv *swd = fs->swd; | |
530 | struct request *req = bd->rq; | |
531 | blk_status_t err; | |
103db8b2 | 532 | |
e3896d77 OS |
533 | if (!spin_trylock_irq(&swd->lock)) |
534 | return BLK_STS_DEV_RESOURCE; | |
103db8b2 | 535 | |
e3896d77 | 536 | blk_mq_start_request(req); |
103db8b2 | 537 | |
e3896d77 OS |
538 | if (!fs->disk_in || rq_data_dir(req) == WRITE) { |
539 | err = BLK_STS_IOERR; | |
540 | goto out; | |
541 | } | |
8852ecd9 | 542 | |
e3896d77 OS |
543 | do { |
544 | err = floppy_read_sectors(fs, blk_rq_pos(req), | |
545 | blk_rq_cur_sectors(req), | |
546 | bio_data(req->bio)); | |
547 | } while (blk_update_request(req, err, blk_rq_cur_bytes(req))); | |
548 | __blk_mq_end_request(req, err); | |
8852ecd9 | 549 | |
e3896d77 OS |
550 | err = BLK_STS_OK; |
551 | out: | |
552 | spin_unlock_irq(&swd->lock); | |
553 | return err; | |
06b0608e | 554 | |
8852ecd9 LV |
555 | } |
556 | ||
8852ecd9 LV |
557 | static struct floppy_struct floppy_type[4] = { |
558 | { 0, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, NULL }, /* no testing */ | |
559 | { 720, 9, 1, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 360KB SS 3.5"*/ | |
560 | { 1440, 9, 2, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 720KB 3.5" */ | |
561 | { 2880, 18, 2, 80, 0, 0x1B, 0x00, 0xCF, 0x6C, NULL }, /* 1.44MB 3.5" */ | |
562 | }; | |
563 | ||
564 | static int get_floppy_geometry(struct floppy_state *fs, int type, | |
565 | struct floppy_struct **g) | |
566 | { | |
567 | if (type >= ARRAY_SIZE(floppy_type)) | |
568 | return -EINVAL; | |
569 | ||
570 | if (type) | |
571 | *g = &floppy_type[type]; | |
572 | else if (fs->type == HD_MEDIA) /* High-Density media */ | |
573 | *g = &floppy_type[3]; | |
574 | else if (fs->head_number == 2) /* double-sided */ | |
575 | *g = &floppy_type[2]; | |
576 | else | |
577 | *g = &floppy_type[1]; | |
578 | ||
579 | return 0; | |
580 | } | |
581 | ||
582 | static void setup_medium(struct floppy_state *fs) | |
583 | { | |
584 | struct swim __iomem *base = fs->swd->base; | |
585 | ||
586 | if (swim_readbit(base, DISK_IN)) { | |
587 | struct floppy_struct *g; | |
588 | fs->disk_in = 1; | |
589 | fs->write_protected = swim_readbit(base, WRITE_PROT); | |
8852ecd9 LV |
590 | |
591 | if (swim_track00(base)) | |
592 | printk(KERN_ERR | |
593 | "SWIM: cannot move floppy head to track 0\n"); | |
594 | ||
595 | swim_track00(base); | |
596 | ||
5a13388d FT |
597 | fs->type = swim_readbit(base, TWOMEG_MEDIA) ? |
598 | HD_MEDIA : DD_MEDIA; | |
599 | fs->head_number = swim_readbit(base, SINGLE_SIDED) ? 1 : 2; | |
8852ecd9 LV |
600 | get_floppy_geometry(fs, 0, &g); |
601 | fs->total_secs = g->size; | |
602 | fs->secpercyl = g->head * g->sect; | |
603 | fs->secpertrack = g->sect; | |
604 | fs->track = 0; | |
605 | } else { | |
606 | fs->disk_in = 0; | |
607 | } | |
608 | } | |
609 | ||
610 | static int floppy_open(struct block_device *bdev, fmode_t mode) | |
611 | { | |
612 | struct floppy_state *fs = bdev->bd_disk->private_data; | |
613 | struct swim __iomem *base = fs->swd->base; | |
614 | int err; | |
615 | ||
616 | if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL)) | |
617 | return -EBUSY; | |
618 | ||
619 | if (mode & FMODE_EXCL) | |
620 | fs->ref_count = -1; | |
621 | else | |
622 | fs->ref_count++; | |
623 | ||
624 | swim_write(base, setup, S_IBM_DRIVE | S_FCLK_DIV2); | |
625 | udelay(10); | |
b3906535 | 626 | swim_drive(base, fs->location); |
8852ecd9 LV |
627 | swim_motor(base, ON); |
628 | swim_action(base, SETMFM); | |
629 | if (fs->ejected) | |
630 | setup_medium(fs); | |
631 | if (!fs->disk_in) { | |
632 | err = -ENXIO; | |
633 | goto out; | |
634 | } | |
635 | ||
5a13388d FT |
636 | set_capacity(fs->disk, fs->total_secs); |
637 | ||
8852ecd9 LV |
638 | if (mode & FMODE_NDELAY) |
639 | return 0; | |
640 | ||
641 | if (mode & (FMODE_READ|FMODE_WRITE)) { | |
433d21ce CH |
642 | if (bdev_check_media_change(bdev) && fs->disk_in) |
643 | fs->ejected = 0; | |
8852ecd9 LV |
644 | if ((mode & FMODE_WRITE) && fs->write_protected) { |
645 | err = -EROFS; | |
646 | goto out; | |
647 | } | |
648 | } | |
649 | return 0; | |
650 | out: | |
651 | if (fs->ref_count < 0) | |
652 | fs->ref_count = 0; | |
653 | else if (fs->ref_count > 0) | |
654 | --fs->ref_count; | |
655 | ||
656 | if (fs->ref_count == 0) | |
657 | swim_motor(base, OFF); | |
658 | return err; | |
659 | } | |
660 | ||
6e9624b8 AB |
661 | static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode) |
662 | { | |
663 | int ret; | |
664 | ||
2a48fc0a | 665 | mutex_lock(&swim_mutex); |
6e9624b8 | 666 | ret = floppy_open(bdev, mode); |
2a48fc0a | 667 | mutex_unlock(&swim_mutex); |
6e9624b8 AB |
668 | |
669 | return ret; | |
670 | } | |
671 | ||
db2a144b | 672 | static void floppy_release(struct gendisk *disk, fmode_t mode) |
8852ecd9 LV |
673 | { |
674 | struct floppy_state *fs = disk->private_data; | |
675 | struct swim __iomem *base = fs->swd->base; | |
676 | ||
2a48fc0a | 677 | mutex_lock(&swim_mutex); |
8852ecd9 LV |
678 | if (fs->ref_count < 0) |
679 | fs->ref_count = 0; | |
680 | else if (fs->ref_count > 0) | |
681 | --fs->ref_count; | |
682 | ||
683 | if (fs->ref_count == 0) | |
684 | swim_motor(base, OFF); | |
2a48fc0a | 685 | mutex_unlock(&swim_mutex); |
8852ecd9 LV |
686 | } |
687 | ||
688 | static int floppy_ioctl(struct block_device *bdev, fmode_t mode, | |
689 | unsigned int cmd, unsigned long param) | |
690 | { | |
691 | struct floppy_state *fs = bdev->bd_disk->private_data; | |
692 | int err; | |
693 | ||
694 | if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)) | |
695 | return -EPERM; | |
696 | ||
697 | switch (cmd) { | |
698 | case FDEJECT: | |
699 | if (fs->ref_count != 1) | |
700 | return -EBUSY; | |
2a48fc0a | 701 | mutex_lock(&swim_mutex); |
8852ecd9 | 702 | err = floppy_eject(fs); |
2a48fc0a | 703 | mutex_unlock(&swim_mutex); |
8852ecd9 LV |
704 | return err; |
705 | ||
706 | case FDGETPRM: | |
707 | if (copy_to_user((void __user *) param, (void *) &floppy_type, | |
708 | sizeof(struct floppy_struct))) | |
709 | return -EFAULT; | |
8e2ab5a4 | 710 | return 0; |
8852ecd9 | 711 | } |
8e2ab5a4 | 712 | return -ENOTTY; |
8852ecd9 LV |
713 | } |
714 | ||
715 | static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
716 | { | |
717 | struct floppy_state *fs = bdev->bd_disk->private_data; | |
718 | struct floppy_struct *g; | |
719 | int ret; | |
720 | ||
721 | ret = get_floppy_geometry(fs, 0, &g); | |
722 | if (ret) | |
723 | return ret; | |
724 | ||
725 | geo->heads = g->head; | |
726 | geo->sectors = g->sect; | |
727 | geo->cylinders = g->track; | |
728 | ||
729 | return 0; | |
730 | } | |
731 | ||
4bbde777 TH |
732 | static unsigned int floppy_check_events(struct gendisk *disk, |
733 | unsigned int clearing) | |
8852ecd9 LV |
734 | { |
735 | struct floppy_state *fs = disk->private_data; | |
736 | ||
4bbde777 | 737 | return fs->ejected ? DISK_EVENT_MEDIA_CHANGE : 0; |
8852ecd9 LV |
738 | } |
739 | ||
83d5cde4 | 740 | static const struct block_device_operations floppy_fops = { |
8852ecd9 | 741 | .owner = THIS_MODULE, |
6e9624b8 | 742 | .open = floppy_unlocked_open, |
8852ecd9 | 743 | .release = floppy_release, |
8a6cfeb6 | 744 | .ioctl = floppy_ioctl, |
8852ecd9 | 745 | .getgeo = floppy_getgeo, |
4bbde777 | 746 | .check_events = floppy_check_events, |
8852ecd9 LV |
747 | }; |
748 | ||
8d85fce7 | 749 | static int swim_add_floppy(struct swim_priv *swd, enum drive_location location) |
8852ecd9 LV |
750 | { |
751 | struct floppy_state *fs = &swd->unit[swd->floppy_count]; | |
752 | struct swim __iomem *base = swd->base; | |
753 | ||
754 | fs->location = location; | |
755 | ||
756 | swim_drive(base, location); | |
757 | ||
758 | swim_motor(base, OFF); | |
759 | ||
5a13388d FT |
760 | fs->type = HD_MEDIA; |
761 | fs->head_number = 2; | |
762 | ||
8852ecd9 LV |
763 | fs->ref_count = 0; |
764 | fs->ejected = 1; | |
765 | ||
766 | swd->floppy_count++; | |
767 | ||
768 | return 0; | |
769 | } | |
770 | ||
e3896d77 OS |
771 | static const struct blk_mq_ops swim_mq_ops = { |
772 | .queue_rq = swim_queue_rq, | |
773 | }; | |
774 | ||
8d85fce7 | 775 | static int swim_floppy_init(struct swim_priv *swd) |
8852ecd9 LV |
776 | { |
777 | int err; | |
778 | int drive; | |
779 | struct swim __iomem *base = swd->base; | |
780 | ||
781 | /* scan floppy drives */ | |
782 | ||
783 | swim_drive(base, INTERNAL_DRIVE); | |
8a500df6 FT |
784 | if (swim_readbit(base, DRIVE_PRESENT) && |
785 | !swim_readbit(base, ONEMEG_DRIVE)) | |
8852ecd9 LV |
786 | swim_add_floppy(swd, INTERNAL_DRIVE); |
787 | swim_drive(base, EXTERNAL_DRIVE); | |
8a500df6 FT |
788 | if (swim_readbit(base, DRIVE_PRESENT) && |
789 | !swim_readbit(base, ONEMEG_DRIVE)) | |
8852ecd9 LV |
790 | swim_add_floppy(swd, EXTERNAL_DRIVE); |
791 | ||
792 | /* register floppy drives */ | |
793 | ||
794 | err = register_blkdev(FLOPPY_MAJOR, "fd"); | |
795 | if (err) { | |
796 | printk(KERN_ERR "Unable to get major %d for SWIM floppy\n", | |
797 | FLOPPY_MAJOR); | |
798 | return -EBUSY; | |
799 | } | |
800 | ||
103db8b2 OS |
801 | spin_lock_init(&swd->lock); |
802 | ||
8852ecd9 | 803 | for (drive = 0; drive < swd->floppy_count; drive++) { |
51fbfedf CH |
804 | err = blk_mq_alloc_sq_tag_set(&swd->unit[drive].tag_set, |
805 | &swim_mq_ops, 2, BLK_MQ_F_SHOULD_MERGE); | |
806 | if (err) | |
8852ecd9 | 807 | goto exit_put_disks; |
e3896d77 | 808 | |
51fbfedf CH |
809 | swd->unit[drive].disk = |
810 | blk_mq_alloc_disk(&swd->unit[drive].tag_set, | |
811 | &swd->unit[drive]); | |
812 | if (IS_ERR(swd->unit[drive].disk)) { | |
813 | blk_mq_free_tag_set(&swd->unit[drive].tag_set); | |
814 | err = PTR_ERR(swd->unit[drive].disk); | |
103db8b2 OS |
815 | goto exit_put_disks; |
816 | } | |
e3896d77 | 817 | |
8852ecd9 LV |
818 | swd->unit[drive].swd = swd; |
819 | } | |
820 | ||
8852ecd9 LV |
821 | for (drive = 0; drive < swd->floppy_count; drive++) { |
822 | swd->unit[drive].disk->flags = GENHD_FL_REMOVABLE; | |
823 | swd->unit[drive].disk->major = FLOPPY_MAJOR; | |
824 | swd->unit[drive].disk->first_minor = drive; | |
51fbfedf | 825 | swd->unit[drive].disk->minors = 1; |
8852ecd9 LV |
826 | sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive); |
827 | swd->unit[drive].disk->fops = &floppy_fops; | |
773008f6 | 828 | swd->unit[drive].disk->events = DISK_EVENT_MEDIA_CHANGE; |
8852ecd9 | 829 | swd->unit[drive].disk->private_data = &swd->unit[drive]; |
8852ecd9 LV |
830 | set_capacity(swd->unit[drive].disk, 2880); |
831 | add_disk(swd->unit[drive].disk); | |
832 | } | |
833 | ||
8852ecd9 LV |
834 | return 0; |
835 | ||
836 | exit_put_disks: | |
837 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1448a2a5 OS |
838 | do { |
839 | struct gendisk *disk = swd->unit[drive].disk; | |
840 | ||
51fbfedf CH |
841 | if (!disk) |
842 | continue; | |
843 | blk_cleanup_disk(disk); | |
844 | blk_mq_free_tag_set(&swd->unit[drive].tag_set); | |
1448a2a5 | 845 | } while (drive--); |
8852ecd9 LV |
846 | return err; |
847 | } | |
848 | ||
8d85fce7 | 849 | static int swim_probe(struct platform_device *dev) |
8852ecd9 LV |
850 | { |
851 | struct resource *res; | |
852 | struct swim __iomem *swim_base; | |
853 | struct swim_priv *swd; | |
854 | int ret; | |
855 | ||
2724daf4 | 856 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
8852ecd9 LV |
857 | if (!res) { |
858 | ret = -ENODEV; | |
859 | goto out; | |
860 | } | |
861 | ||
862 | if (!request_mem_region(res->start, resource_size(res), CARDNAME)) { | |
863 | ret = -EBUSY; | |
864 | goto out; | |
865 | } | |
866 | ||
b64576cb | 867 | swim_base = (struct swim __iomem *)res->start; |
8852ecd9 | 868 | if (!swim_base) { |
957d6bf6 | 869 | ret = -ENOMEM; |
8852ecd9 LV |
870 | goto out_release_io; |
871 | } | |
872 | ||
873 | /* probe device */ | |
874 | ||
875 | set_swim_mode(swim_base, 1); | |
876 | if (!get_swim_mode(swim_base)) { | |
877 | printk(KERN_INFO "SWIM device not found !\n"); | |
878 | ret = -ENODEV; | |
b64576cb | 879 | goto out_release_io; |
8852ecd9 LV |
880 | } |
881 | ||
882 | /* set platform driver data */ | |
883 | ||
884 | swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL); | |
885 | if (!swd) { | |
886 | ret = -ENOMEM; | |
b64576cb | 887 | goto out_release_io; |
8852ecd9 LV |
888 | } |
889 | platform_set_drvdata(dev, swd); | |
890 | ||
891 | swd->base = swim_base; | |
892 | ||
893 | ret = swim_floppy_init(swd); | |
894 | if (ret) | |
895 | goto out_kfree; | |
896 | ||
897 | return 0; | |
898 | ||
899 | out_kfree: | |
8852ecd9 | 900 | kfree(swd); |
8852ecd9 LV |
901 | out_release_io: |
902 | release_mem_region(res->start, resource_size(res)); | |
903 | out: | |
904 | return ret; | |
905 | } | |
906 | ||
8d85fce7 | 907 | static int swim_remove(struct platform_device *dev) |
8852ecd9 LV |
908 | { |
909 | struct swim_priv *swd = platform_get_drvdata(dev); | |
910 | int drive; | |
911 | struct resource *res; | |
912 | ||
8852ecd9 LV |
913 | for (drive = 0; drive < swd->floppy_count; drive++) { |
914 | del_gendisk(swd->unit[drive].disk); | |
103db8b2 | 915 | blk_cleanup_queue(swd->unit[drive].disk->queue); |
e3896d77 | 916 | blk_mq_free_tag_set(&swd->unit[drive].tag_set); |
8852ecd9 LV |
917 | put_disk(swd->unit[drive].disk); |
918 | } | |
919 | ||
920 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
921 | ||
8852ecd9 LV |
922 | /* eject floppies */ |
923 | ||
924 | for (drive = 0; drive < swd->floppy_count; drive++) | |
925 | floppy_eject(&swd->unit[drive]); | |
926 | ||
2724daf4 | 927 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
8852ecd9 LV |
928 | if (res) |
929 | release_mem_region(res->start, resource_size(res)); | |
930 | ||
8852ecd9 LV |
931 | kfree(swd); |
932 | ||
933 | return 0; | |
934 | } | |
935 | ||
936 | static struct platform_driver swim_driver = { | |
937 | .probe = swim_probe, | |
8d85fce7 | 938 | .remove = swim_remove, |
8852ecd9 LV |
939 | .driver = { |
940 | .name = CARDNAME, | |
8852ecd9 LV |
941 | }, |
942 | }; | |
943 | ||
944 | static int __init swim_init(void) | |
945 | { | |
946 | printk(KERN_INFO "SWIM floppy driver %s\n", DRIVER_VERSION); | |
947 | ||
948 | return platform_driver_register(&swim_driver); | |
949 | } | |
950 | module_init(swim_init); | |
951 | ||
952 | static void __exit swim_exit(void) | |
953 | { | |
954 | platform_driver_unregister(&swim_driver); | |
955 | } | |
956 | module_exit(swim_exit); | |
957 | ||
958 | MODULE_DESCRIPTION("Driver for SWIM floppy controller"); | |
959 | MODULE_LICENSE("GPL"); | |
960 | MODULE_AUTHOR("Laurent Vivier <laurent@lvivier.info>"); | |
961 | MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); |