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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> |
2a48fc0a | 19 | #include <linux/mutex.h> |
8852ecd9 LV |
20 | #include <linux/hdreg.h> |
21 | #include <linux/kernel.h> | |
22 | #include <linux/delay.h> | |
23 | #include <linux/platform_device.h> | |
24 | ||
8852ecd9 LV |
25 | #include <asm/mac_via.h> |
26 | ||
27 | #define CARDNAME "swim" | |
28 | ||
29 | struct sector_header { | |
30 | unsigned char side; | |
31 | unsigned char track; | |
32 | unsigned char sector; | |
33 | unsigned char size; | |
34 | unsigned char crc0; | |
35 | unsigned char crc1; | |
36 | } __attribute__((packed)); | |
37 | ||
38 | #define DRIVER_VERSION "Version 0.2 (2008-10-30)" | |
39 | ||
40 | #define REG(x) unsigned char x, x ## _pad[0x200 - 1]; | |
41 | ||
42 | struct swim { | |
43 | REG(write_data) | |
44 | REG(write_mark) | |
45 | REG(write_CRC) | |
46 | REG(write_parameter) | |
47 | REG(write_phase) | |
48 | REG(write_setup) | |
49 | REG(write_mode0) | |
50 | REG(write_mode1) | |
51 | ||
52 | REG(read_data) | |
53 | REG(read_mark) | |
54 | REG(read_error) | |
55 | REG(read_parameter) | |
56 | REG(read_phase) | |
57 | REG(read_setup) | |
58 | REG(read_status) | |
59 | REG(read_handshake) | |
60 | } __attribute__((packed)); | |
61 | ||
62 | #define swim_write(base, reg, v) out_8(&(base)->write_##reg, (v)) | |
63 | #define swim_read(base, reg) in_8(&(base)->read_##reg) | |
64 | ||
65 | /* IWM registers */ | |
66 | ||
67 | struct iwm { | |
68 | REG(ph0L) | |
69 | REG(ph0H) | |
70 | REG(ph1L) | |
71 | REG(ph1H) | |
72 | REG(ph2L) | |
73 | REG(ph2H) | |
74 | REG(ph3L) | |
75 | REG(ph3H) | |
76 | REG(mtrOff) | |
77 | REG(mtrOn) | |
78 | REG(intDrive) | |
79 | REG(extDrive) | |
80 | REG(q6L) | |
81 | REG(q6H) | |
82 | REG(q7L) | |
83 | REG(q7H) | |
84 | } __attribute__((packed)); | |
85 | ||
86 | #define iwm_write(base, reg, v) out_8(&(base)->reg, (v)) | |
87 | #define iwm_read(base, reg) in_8(&(base)->reg) | |
88 | ||
89 | /* bits in phase register */ | |
90 | ||
91 | #define SEEK_POSITIVE 0x070 | |
92 | #define SEEK_NEGATIVE 0x074 | |
93 | #define STEP 0x071 | |
94 | #define MOTOR_ON 0x072 | |
95 | #define MOTOR_OFF 0x076 | |
96 | #define INDEX 0x073 | |
97 | #define EJECT 0x077 | |
98 | #define SETMFM 0x171 | |
99 | #define SETGCR 0x175 | |
100 | ||
101 | #define RELAX 0x033 | |
102 | #define LSTRB 0x008 | |
103 | ||
104 | #define CA_MASK 0x077 | |
105 | ||
106 | /* Select values for swim_select and swim_readbit */ | |
107 | ||
108 | #define READ_DATA_0 0x074 | |
56a1c5ee | 109 | #define ONEMEG_DRIVE 0x075 |
8852ecd9 LV |
110 | #define SINGLE_SIDED 0x076 |
111 | #define DRIVE_PRESENT 0x077 | |
112 | #define DISK_IN 0x170 | |
113 | #define WRITE_PROT 0x171 | |
114 | #define TRACK_ZERO 0x172 | |
115 | #define TACHO 0x173 | |
116 | #define READ_DATA_1 0x174 | |
56a1c5ee | 117 | #define GCR_MODE 0x175 |
8852ecd9 | 118 | #define SEEK_COMPLETE 0x176 |
56a1c5ee | 119 | #define TWOMEG_MEDIA 0x177 |
8852ecd9 LV |
120 | |
121 | /* Bits in handshake register */ | |
122 | ||
123 | #define MARK_BYTE 0x01 | |
124 | #define CRC_ZERO 0x02 | |
125 | #define RDDATA 0x04 | |
126 | #define SENSE 0x08 | |
127 | #define MOTEN 0x10 | |
128 | #define ERROR 0x20 | |
129 | #define DAT2BYTE 0x40 | |
130 | #define DAT1BYTE 0x80 | |
131 | ||
132 | /* bits in setup register */ | |
133 | ||
134 | #define S_INV_WDATA 0x01 | |
135 | #define S_3_5_SELECT 0x02 | |
136 | #define S_GCR 0x04 | |
137 | #define S_FCLK_DIV2 0x08 | |
138 | #define S_ERROR_CORR 0x10 | |
139 | #define S_IBM_DRIVE 0x20 | |
140 | #define S_GCR_WRITE 0x40 | |
141 | #define S_TIMEOUT 0x80 | |
142 | ||
143 | /* bits in mode register */ | |
144 | ||
145 | #define CLFIFO 0x01 | |
146 | #define ENBL1 0x02 | |
147 | #define ENBL2 0x04 | |
148 | #define ACTION 0x08 | |
149 | #define WRITE_MODE 0x10 | |
150 | #define HEDSEL 0x20 | |
151 | #define MOTON 0x80 | |
152 | ||
153 | /*----------------------------------------------------------------------------*/ | |
154 | ||
155 | enum drive_location { | |
156 | INTERNAL_DRIVE = 0x02, | |
157 | EXTERNAL_DRIVE = 0x04, | |
158 | }; | |
159 | ||
160 | enum media_type { | |
161 | DD_MEDIA, | |
162 | HD_MEDIA, | |
163 | }; | |
164 | ||
165 | struct floppy_state { | |
166 | ||
167 | /* physical properties */ | |
168 | ||
169 | enum drive_location location; /* internal or external drive */ | |
170 | int head_number; /* single- or double-sided drive */ | |
171 | ||
172 | /* media */ | |
173 | ||
174 | int disk_in; | |
175 | int ejected; | |
176 | enum media_type type; | |
177 | int write_protected; | |
178 | ||
179 | int total_secs; | |
180 | int secpercyl; | |
181 | int secpertrack; | |
182 | ||
183 | /* in-use information */ | |
184 | ||
185 | int track; | |
186 | int ref_count; | |
187 | ||
188 | struct gendisk *disk; | |
e3896d77 | 189 | struct blk_mq_tag_set tag_set; |
8852ecd9 LV |
190 | |
191 | /* parent controller */ | |
192 | ||
193 | struct swim_priv *swd; | |
194 | }; | |
195 | ||
196 | enum motor_action { | |
197 | OFF, | |
198 | ON, | |
199 | }; | |
200 | ||
201 | enum head { | |
202 | LOWER_HEAD = 0, | |
203 | UPPER_HEAD = 1, | |
204 | }; | |
205 | ||
206 | #define FD_MAX_UNIT 2 | |
207 | ||
208 | struct swim_priv { | |
209 | struct swim __iomem *base; | |
210 | spinlock_t lock; | |
8852ecd9 LV |
211 | int floppy_count; |
212 | struct floppy_state unit[FD_MAX_UNIT]; | |
213 | }; | |
214 | ||
215 | extern int swim_read_sector_header(struct swim __iomem *base, | |
216 | struct sector_header *header); | |
217 | extern int swim_read_sector_data(struct swim __iomem *base, | |
218 | unsigned char *data); | |
219 | ||
7fe76fc0 CH |
220 | static int floppy_revalidate(struct gendisk *disk); |
221 | ||
2a48fc0a | 222 | static DEFINE_MUTEX(swim_mutex); |
8852ecd9 LV |
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; | |
c6516565 | 332 | set_current_state(TASK_INTERRUPTIBLE); |
8852ecd9 LV |
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; | |
c6516565 | 351 | set_current_state(TASK_INTERRUPTIBLE); |
8852ecd9 LV |
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 | ||
c6516565 | 375 | set_current_state(TASK_INTERRUPTIBLE); |
8852ecd9 LV |
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 | ||
2a842aca | 494 | static blk_status_t floppy_read_sectors(struct floppy_state *fs, |
8852ecd9 LV |
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) | |
2a842aca | 517 | return BLK_STS_IOERR; |
8852ecd9 LV |
518 | } while (ret != 512); |
519 | ||
520 | buffer += ret; | |
521 | } | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
e3896d77 OS |
526 | static blk_status_t swim_queue_rq(struct blk_mq_hw_ctx *hctx, |
527 | const struct blk_mq_queue_data *bd) | |
8852ecd9 | 528 | { |
e3896d77 OS |
529 | struct floppy_state *fs = hctx->queue->queuedata; |
530 | struct swim_priv *swd = fs->swd; | |
531 | struct request *req = bd->rq; | |
532 | blk_status_t err; | |
103db8b2 | 533 | |
e3896d77 OS |
534 | if (!spin_trylock_irq(&swd->lock)) |
535 | return BLK_STS_DEV_RESOURCE; | |
103db8b2 | 536 | |
e3896d77 | 537 | blk_mq_start_request(req); |
103db8b2 | 538 | |
e3896d77 OS |
539 | if (!fs->disk_in || rq_data_dir(req) == WRITE) { |
540 | err = BLK_STS_IOERR; | |
541 | goto out; | |
542 | } | |
8852ecd9 | 543 | |
e3896d77 OS |
544 | do { |
545 | err = floppy_read_sectors(fs, blk_rq_pos(req), | |
546 | blk_rq_cur_sectors(req), | |
547 | bio_data(req->bio)); | |
548 | } while (blk_update_request(req, err, blk_rq_cur_bytes(req))); | |
549 | __blk_mq_end_request(req, err); | |
8852ecd9 | 550 | |
e3896d77 OS |
551 | err = BLK_STS_OK; |
552 | out: | |
553 | spin_unlock_irq(&swd->lock); | |
554 | return err; | |
06b0608e | 555 | |
8852ecd9 LV |
556 | } |
557 | ||
8852ecd9 LV |
558 | static struct floppy_struct floppy_type[4] = { |
559 | { 0, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, NULL }, /* no testing */ | |
560 | { 720, 9, 1, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 360KB SS 3.5"*/ | |
561 | { 1440, 9, 2, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 720KB 3.5" */ | |
562 | { 2880, 18, 2, 80, 0, 0x1B, 0x00, 0xCF, 0x6C, NULL }, /* 1.44MB 3.5" */ | |
563 | }; | |
564 | ||
565 | static int get_floppy_geometry(struct floppy_state *fs, int type, | |
566 | struct floppy_struct **g) | |
567 | { | |
568 | if (type >= ARRAY_SIZE(floppy_type)) | |
569 | return -EINVAL; | |
570 | ||
571 | if (type) | |
572 | *g = &floppy_type[type]; | |
573 | else if (fs->type == HD_MEDIA) /* High-Density media */ | |
574 | *g = &floppy_type[3]; | |
575 | else if (fs->head_number == 2) /* double-sided */ | |
576 | *g = &floppy_type[2]; | |
577 | else | |
578 | *g = &floppy_type[1]; | |
579 | ||
580 | return 0; | |
581 | } | |
582 | ||
583 | static void setup_medium(struct floppy_state *fs) | |
584 | { | |
585 | struct swim __iomem *base = fs->swd->base; | |
586 | ||
587 | if (swim_readbit(base, DISK_IN)) { | |
588 | struct floppy_struct *g; | |
589 | fs->disk_in = 1; | |
590 | fs->write_protected = swim_readbit(base, WRITE_PROT); | |
8852ecd9 LV |
591 | |
592 | if (swim_track00(base)) | |
593 | printk(KERN_ERR | |
594 | "SWIM: cannot move floppy head to track 0\n"); | |
595 | ||
596 | swim_track00(base); | |
597 | ||
5a13388d FT |
598 | fs->type = swim_readbit(base, TWOMEG_MEDIA) ? |
599 | HD_MEDIA : DD_MEDIA; | |
600 | fs->head_number = swim_readbit(base, SINGLE_SIDED) ? 1 : 2; | |
8852ecd9 LV |
601 | get_floppy_geometry(fs, 0, &g); |
602 | fs->total_secs = g->size; | |
603 | fs->secpercyl = g->head * g->sect; | |
604 | fs->secpertrack = g->sect; | |
605 | fs->track = 0; | |
606 | } else { | |
607 | fs->disk_in = 0; | |
608 | } | |
609 | } | |
610 | ||
611 | static int floppy_open(struct block_device *bdev, fmode_t mode) | |
612 | { | |
613 | struct floppy_state *fs = bdev->bd_disk->private_data; | |
614 | struct swim __iomem *base = fs->swd->base; | |
615 | int err; | |
616 | ||
617 | if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL)) | |
618 | return -EBUSY; | |
619 | ||
620 | if (mode & FMODE_EXCL) | |
621 | fs->ref_count = -1; | |
622 | else | |
623 | fs->ref_count++; | |
624 | ||
625 | swim_write(base, setup, S_IBM_DRIVE | S_FCLK_DIV2); | |
626 | udelay(10); | |
b3906535 | 627 | swim_drive(base, fs->location); |
8852ecd9 LV |
628 | swim_motor(base, ON); |
629 | swim_action(base, SETMFM); | |
630 | if (fs->ejected) | |
631 | setup_medium(fs); | |
632 | if (!fs->disk_in) { | |
633 | err = -ENXIO; | |
634 | goto out; | |
635 | } | |
636 | ||
5a13388d FT |
637 | set_capacity(fs->disk, fs->total_secs); |
638 | ||
8852ecd9 LV |
639 | if (mode & FMODE_NDELAY) |
640 | return 0; | |
641 | ||
642 | if (mode & (FMODE_READ|FMODE_WRITE)) { | |
7fe76fc0 CH |
643 | if (bdev_check_media_change(bdev)) |
644 | floppy_revalidate(bdev->bd_disk); | |
8852ecd9 LV |
645 | if ((mode & FMODE_WRITE) && fs->write_protected) { |
646 | err = -EROFS; | |
647 | goto out; | |
648 | } | |
649 | } | |
650 | return 0; | |
651 | out: | |
652 | if (fs->ref_count < 0) | |
653 | fs->ref_count = 0; | |
654 | else if (fs->ref_count > 0) | |
655 | --fs->ref_count; | |
656 | ||
657 | if (fs->ref_count == 0) | |
658 | swim_motor(base, OFF); | |
659 | return err; | |
660 | } | |
661 | ||
6e9624b8 AB |
662 | static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode) |
663 | { | |
664 | int ret; | |
665 | ||
2a48fc0a | 666 | mutex_lock(&swim_mutex); |
6e9624b8 | 667 | ret = floppy_open(bdev, mode); |
2a48fc0a | 668 | mutex_unlock(&swim_mutex); |
6e9624b8 AB |
669 | |
670 | return ret; | |
671 | } | |
672 | ||
db2a144b | 673 | static void floppy_release(struct gendisk *disk, fmode_t mode) |
8852ecd9 LV |
674 | { |
675 | struct floppy_state *fs = disk->private_data; | |
676 | struct swim __iomem *base = fs->swd->base; | |
677 | ||
2a48fc0a | 678 | mutex_lock(&swim_mutex); |
8852ecd9 LV |
679 | if (fs->ref_count < 0) |
680 | fs->ref_count = 0; | |
681 | else if (fs->ref_count > 0) | |
682 | --fs->ref_count; | |
683 | ||
684 | if (fs->ref_count == 0) | |
685 | swim_motor(base, OFF); | |
2a48fc0a | 686 | mutex_unlock(&swim_mutex); |
8852ecd9 LV |
687 | } |
688 | ||
689 | static int floppy_ioctl(struct block_device *bdev, fmode_t mode, | |
690 | unsigned int cmd, unsigned long param) | |
691 | { | |
692 | struct floppy_state *fs = bdev->bd_disk->private_data; | |
693 | int err; | |
694 | ||
695 | if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)) | |
696 | return -EPERM; | |
697 | ||
698 | switch (cmd) { | |
699 | case FDEJECT: | |
700 | if (fs->ref_count != 1) | |
701 | return -EBUSY; | |
2a48fc0a | 702 | mutex_lock(&swim_mutex); |
8852ecd9 | 703 | err = floppy_eject(fs); |
2a48fc0a | 704 | mutex_unlock(&swim_mutex); |
8852ecd9 LV |
705 | return err; |
706 | ||
707 | case FDGETPRM: | |
708 | if (copy_to_user((void __user *) param, (void *) &floppy_type, | |
709 | sizeof(struct floppy_struct))) | |
710 | return -EFAULT; | |
8e2ab5a4 | 711 | return 0; |
8852ecd9 | 712 | } |
8e2ab5a4 | 713 | return -ENOTTY; |
8852ecd9 LV |
714 | } |
715 | ||
716 | static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
717 | { | |
718 | struct floppy_state *fs = bdev->bd_disk->private_data; | |
719 | struct floppy_struct *g; | |
720 | int ret; | |
721 | ||
722 | ret = get_floppy_geometry(fs, 0, &g); | |
723 | if (ret) | |
724 | return ret; | |
725 | ||
726 | geo->heads = g->head; | |
727 | geo->sectors = g->sect; | |
728 | geo->cylinders = g->track; | |
729 | ||
730 | return 0; | |
731 | } | |
732 | ||
4bbde777 TH |
733 | static unsigned int floppy_check_events(struct gendisk *disk, |
734 | unsigned int clearing) | |
8852ecd9 LV |
735 | { |
736 | struct floppy_state *fs = disk->private_data; | |
737 | ||
4bbde777 | 738 | return fs->ejected ? DISK_EVENT_MEDIA_CHANGE : 0; |
8852ecd9 LV |
739 | } |
740 | ||
741 | static int floppy_revalidate(struct gendisk *disk) | |
742 | { | |
743 | struct floppy_state *fs = disk->private_data; | |
744 | struct swim __iomem *base = fs->swd->base; | |
745 | ||
746 | swim_drive(base, fs->location); | |
747 | ||
748 | if (fs->ejected) | |
749 | setup_medium(fs); | |
750 | ||
751 | if (!fs->disk_in) | |
752 | swim_motor(base, OFF); | |
753 | else | |
754 | fs->ejected = 0; | |
755 | ||
756 | return !fs->disk_in; | |
757 | } | |
758 | ||
83d5cde4 | 759 | static const struct block_device_operations floppy_fops = { |
8852ecd9 | 760 | .owner = THIS_MODULE, |
6e9624b8 | 761 | .open = floppy_unlocked_open, |
8852ecd9 | 762 | .release = floppy_release, |
8a6cfeb6 | 763 | .ioctl = floppy_ioctl, |
8852ecd9 | 764 | .getgeo = floppy_getgeo, |
4bbde777 | 765 | .check_events = floppy_check_events, |
8852ecd9 LV |
766 | }; |
767 | ||
768 | static struct kobject *floppy_find(dev_t dev, int *part, void *data) | |
769 | { | |
770 | struct swim_priv *swd = data; | |
771 | int drive = (*part & 3); | |
772 | ||
7ae6a2b6 | 773 | if (drive >= swd->floppy_count) |
8852ecd9 LV |
774 | return NULL; |
775 | ||
776 | *part = 0; | |
3079c22e | 777 | return get_disk_and_module(swd->unit[drive].disk); |
8852ecd9 LV |
778 | } |
779 | ||
8d85fce7 | 780 | static int swim_add_floppy(struct swim_priv *swd, enum drive_location location) |
8852ecd9 LV |
781 | { |
782 | struct floppy_state *fs = &swd->unit[swd->floppy_count]; | |
783 | struct swim __iomem *base = swd->base; | |
784 | ||
785 | fs->location = location; | |
786 | ||
787 | swim_drive(base, location); | |
788 | ||
789 | swim_motor(base, OFF); | |
790 | ||
5a13388d FT |
791 | fs->type = HD_MEDIA; |
792 | fs->head_number = 2; | |
793 | ||
8852ecd9 LV |
794 | fs->ref_count = 0; |
795 | fs->ejected = 1; | |
796 | ||
797 | swd->floppy_count++; | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
e3896d77 OS |
802 | static const struct blk_mq_ops swim_mq_ops = { |
803 | .queue_rq = swim_queue_rq, | |
804 | }; | |
805 | ||
8d85fce7 | 806 | static int swim_floppy_init(struct swim_priv *swd) |
8852ecd9 LV |
807 | { |
808 | int err; | |
809 | int drive; | |
810 | struct swim __iomem *base = swd->base; | |
811 | ||
812 | /* scan floppy drives */ | |
813 | ||
814 | swim_drive(base, INTERNAL_DRIVE); | |
8a500df6 FT |
815 | if (swim_readbit(base, DRIVE_PRESENT) && |
816 | !swim_readbit(base, ONEMEG_DRIVE)) | |
8852ecd9 LV |
817 | swim_add_floppy(swd, INTERNAL_DRIVE); |
818 | swim_drive(base, EXTERNAL_DRIVE); | |
8a500df6 FT |
819 | if (swim_readbit(base, DRIVE_PRESENT) && |
820 | !swim_readbit(base, ONEMEG_DRIVE)) | |
8852ecd9 LV |
821 | swim_add_floppy(swd, EXTERNAL_DRIVE); |
822 | ||
823 | /* register floppy drives */ | |
824 | ||
825 | err = register_blkdev(FLOPPY_MAJOR, "fd"); | |
826 | if (err) { | |
827 | printk(KERN_ERR "Unable to get major %d for SWIM floppy\n", | |
828 | FLOPPY_MAJOR); | |
829 | return -EBUSY; | |
830 | } | |
831 | ||
103db8b2 OS |
832 | spin_lock_init(&swd->lock); |
833 | ||
8852ecd9 | 834 | for (drive = 0; drive < swd->floppy_count; drive++) { |
e3896d77 OS |
835 | struct request_queue *q; |
836 | ||
8852ecd9 LV |
837 | swd->unit[drive].disk = alloc_disk(1); |
838 | if (swd->unit[drive].disk == NULL) { | |
839 | err = -ENOMEM; | |
840 | goto exit_put_disks; | |
841 | } | |
e3896d77 OS |
842 | |
843 | q = blk_mq_init_sq_queue(&swd->unit[drive].tag_set, &swim_mq_ops, | |
844 | 2, BLK_MQ_F_SHOULD_MERGE); | |
845 | if (IS_ERR(q)) { | |
846 | err = PTR_ERR(q); | |
103db8b2 OS |
847 | goto exit_put_disks; |
848 | } | |
e3896d77 OS |
849 | |
850 | swd->unit[drive].disk->queue = q; | |
8fc45044 CH |
851 | blk_queue_bounce_limit(swd->unit[drive].disk->queue, |
852 | BLK_BOUNCE_HIGH); | |
e3896d77 | 853 | swd->unit[drive].disk->queue->queuedata = &swd->unit[drive]; |
8852ecd9 LV |
854 | swd->unit[drive].swd = swd; |
855 | } | |
856 | ||
8852ecd9 LV |
857 | for (drive = 0; drive < swd->floppy_count; drive++) { |
858 | swd->unit[drive].disk->flags = GENHD_FL_REMOVABLE; | |
859 | swd->unit[drive].disk->major = FLOPPY_MAJOR; | |
860 | swd->unit[drive].disk->first_minor = drive; | |
861 | sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive); | |
862 | swd->unit[drive].disk->fops = &floppy_fops; | |
773008f6 | 863 | swd->unit[drive].disk->events = DISK_EVENT_MEDIA_CHANGE; |
8852ecd9 | 864 | swd->unit[drive].disk->private_data = &swd->unit[drive]; |
8852ecd9 LV |
865 | set_capacity(swd->unit[drive].disk, 2880); |
866 | add_disk(swd->unit[drive].disk); | |
867 | } | |
868 | ||
869 | blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, | |
870 | floppy_find, NULL, swd); | |
871 | ||
872 | return 0; | |
873 | ||
874 | exit_put_disks: | |
875 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1448a2a5 OS |
876 | do { |
877 | struct gendisk *disk = swd->unit[drive].disk; | |
878 | ||
879 | if (disk) { | |
880 | if (disk->queue) { | |
881 | blk_cleanup_queue(disk->queue); | |
882 | disk->queue = NULL; | |
883 | } | |
e3896d77 | 884 | blk_mq_free_tag_set(&swd->unit[drive].tag_set); |
1448a2a5 OS |
885 | put_disk(disk); |
886 | } | |
887 | } while (drive--); | |
8852ecd9 LV |
888 | return err; |
889 | } | |
890 | ||
8d85fce7 | 891 | static int swim_probe(struct platform_device *dev) |
8852ecd9 LV |
892 | { |
893 | struct resource *res; | |
894 | struct swim __iomem *swim_base; | |
895 | struct swim_priv *swd; | |
896 | int ret; | |
897 | ||
2724daf4 | 898 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
8852ecd9 LV |
899 | if (!res) { |
900 | ret = -ENODEV; | |
901 | goto out; | |
902 | } | |
903 | ||
904 | if (!request_mem_region(res->start, resource_size(res), CARDNAME)) { | |
905 | ret = -EBUSY; | |
906 | goto out; | |
907 | } | |
908 | ||
b64576cb | 909 | swim_base = (struct swim __iomem *)res->start; |
8852ecd9 | 910 | if (!swim_base) { |
957d6bf6 | 911 | ret = -ENOMEM; |
8852ecd9 LV |
912 | goto out_release_io; |
913 | } | |
914 | ||
915 | /* probe device */ | |
916 | ||
917 | set_swim_mode(swim_base, 1); | |
918 | if (!get_swim_mode(swim_base)) { | |
919 | printk(KERN_INFO "SWIM device not found !\n"); | |
920 | ret = -ENODEV; | |
b64576cb | 921 | goto out_release_io; |
8852ecd9 LV |
922 | } |
923 | ||
924 | /* set platform driver data */ | |
925 | ||
926 | swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL); | |
927 | if (!swd) { | |
928 | ret = -ENOMEM; | |
b64576cb | 929 | goto out_release_io; |
8852ecd9 LV |
930 | } |
931 | platform_set_drvdata(dev, swd); | |
932 | ||
933 | swd->base = swim_base; | |
934 | ||
935 | ret = swim_floppy_init(swd); | |
936 | if (ret) | |
937 | goto out_kfree; | |
938 | ||
939 | return 0; | |
940 | ||
941 | out_kfree: | |
8852ecd9 | 942 | kfree(swd); |
8852ecd9 LV |
943 | out_release_io: |
944 | release_mem_region(res->start, resource_size(res)); | |
945 | out: | |
946 | return ret; | |
947 | } | |
948 | ||
8d85fce7 | 949 | static int swim_remove(struct platform_device *dev) |
8852ecd9 LV |
950 | { |
951 | struct swim_priv *swd = platform_get_drvdata(dev); | |
952 | int drive; | |
953 | struct resource *res; | |
954 | ||
955 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); | |
956 | ||
957 | for (drive = 0; drive < swd->floppy_count; drive++) { | |
958 | del_gendisk(swd->unit[drive].disk); | |
103db8b2 | 959 | blk_cleanup_queue(swd->unit[drive].disk->queue); |
e3896d77 | 960 | blk_mq_free_tag_set(&swd->unit[drive].tag_set); |
8852ecd9 LV |
961 | put_disk(swd->unit[drive].disk); |
962 | } | |
963 | ||
964 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
965 | ||
8852ecd9 LV |
966 | /* eject floppies */ |
967 | ||
968 | for (drive = 0; drive < swd->floppy_count; drive++) | |
969 | floppy_eject(&swd->unit[drive]); | |
970 | ||
2724daf4 | 971 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
8852ecd9 LV |
972 | if (res) |
973 | release_mem_region(res->start, resource_size(res)); | |
974 | ||
8852ecd9 LV |
975 | kfree(swd); |
976 | ||
977 | return 0; | |
978 | } | |
979 | ||
980 | static struct platform_driver swim_driver = { | |
981 | .probe = swim_probe, | |
8d85fce7 | 982 | .remove = swim_remove, |
8852ecd9 LV |
983 | .driver = { |
984 | .name = CARDNAME, | |
8852ecd9 LV |
985 | }, |
986 | }; | |
987 | ||
988 | static int __init swim_init(void) | |
989 | { | |
990 | printk(KERN_INFO "SWIM floppy driver %s\n", DRIVER_VERSION); | |
991 | ||
992 | return platform_driver_register(&swim_driver); | |
993 | } | |
994 | module_init(swim_init); | |
995 | ||
996 | static void __exit swim_exit(void) | |
997 | { | |
998 | platform_driver_unregister(&swim_driver); | |
999 | } | |
1000 | module_exit(swim_exit); | |
1001 | ||
1002 | MODULE_DESCRIPTION("Driver for SWIM floppy controller"); | |
1003 | MODULE_LICENSE("GPL"); | |
1004 | MODULE_AUTHOR("Laurent Vivier <laurent@lvivier.info>"); | |
1005 | MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); |