Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Driver for the SWIM3 (Super Woz Integrated Machine 3) | |
3 | * floppy controller found on Power Macintoshes. | |
4 | * | |
5 | * Copyright (C) 1996 Paul Mackerras. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | */ | |
12 | ||
13 | /* | |
14 | * TODO: | |
15 | * handle 2 drives | |
16 | * handle GCR disks | |
17 | */ | |
18 | ||
1da177e4 LT |
19 | #include <linux/stddef.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/sched.h> | |
22 | #include <linux/timer.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/fd.h> | |
25 | #include <linux/ioctl.h> | |
26 | #include <linux/blkdev.h> | |
1da177e4 | 27 | #include <linux/interrupt.h> |
2a48fc0a | 28 | #include <linux/mutex.h> |
1da177e4 | 29 | #include <linux/module.h> |
515729ec | 30 | #include <linux/spinlock.h> |
1da177e4 LT |
31 | #include <asm/io.h> |
32 | #include <asm/dbdma.h> | |
33 | #include <asm/prom.h> | |
34 | #include <asm/uaccess.h> | |
35 | #include <asm/mediabay.h> | |
36 | #include <asm/machdep.h> | |
37 | #include <asm/pmac_feature.h> | |
38 | ||
2a48fc0a | 39 | static DEFINE_MUTEX(swim3_mutex); |
1da177e4 LT |
40 | static struct request_queue *swim3_queue; |
41 | static struct gendisk *disks[2]; | |
42 | static struct request *fd_req; | |
43 | ||
44 | #define MAX_FLOPPIES 2 | |
45 | ||
46 | enum swim_state { | |
47 | idle, | |
48 | locating, | |
49 | seeking, | |
50 | settling, | |
51 | do_transfer, | |
52 | jogging, | |
53 | available, | |
54 | revalidating, | |
55 | ejecting | |
56 | }; | |
57 | ||
58 | #define REG(x) unsigned char x; char x ## _pad[15]; | |
59 | ||
60 | /* | |
61 | * The names for these registers mostly represent speculation on my part. | |
62 | * It will be interesting to see how close they are to the names Apple uses. | |
63 | */ | |
64 | struct swim3 { | |
65 | REG(data); | |
66 | REG(timer); /* counts down at 1MHz */ | |
67 | REG(error); | |
68 | REG(mode); | |
69 | REG(select); /* controls CA0, CA1, CA2 and LSTRB signals */ | |
70 | REG(setup); | |
71 | REG(control); /* writing bits clears them */ | |
72 | REG(status); /* writing bits sets them in control */ | |
73 | REG(intr); | |
74 | REG(nseek); /* # tracks to seek */ | |
75 | REG(ctrack); /* current track number */ | |
76 | REG(csect); /* current sector number */ | |
77 | REG(gap3); /* size of gap 3 in track format */ | |
78 | REG(sector); /* sector # to read or write */ | |
79 | REG(nsect); /* # sectors to read or write */ | |
80 | REG(intr_enable); | |
81 | }; | |
82 | ||
83 | #define control_bic control | |
84 | #define control_bis status | |
85 | ||
86 | /* Bits in select register */ | |
87 | #define CA_MASK 7 | |
88 | #define LSTRB 8 | |
89 | ||
90 | /* Bits in control register */ | |
91 | #define DO_SEEK 0x80 | |
92 | #define FORMAT 0x40 | |
93 | #define SELECT 0x20 | |
94 | #define WRITE_SECTORS 0x10 | |
95 | #define DO_ACTION 0x08 | |
96 | #define DRIVE2_ENABLE 0x04 | |
97 | #define DRIVE_ENABLE 0x02 | |
98 | #define INTR_ENABLE 0x01 | |
99 | ||
100 | /* Bits in status register */ | |
101 | #define FIFO_1BYTE 0x80 | |
102 | #define FIFO_2BYTE 0x40 | |
103 | #define ERROR 0x20 | |
104 | #define DATA 0x08 | |
105 | #define RDDATA 0x04 | |
106 | #define INTR_PENDING 0x02 | |
107 | #define MARK_BYTE 0x01 | |
108 | ||
109 | /* Bits in intr and intr_enable registers */ | |
110 | #define ERROR_INTR 0x20 | |
111 | #define DATA_CHANGED 0x10 | |
112 | #define TRANSFER_DONE 0x08 | |
113 | #define SEEN_SECTOR 0x04 | |
114 | #define SEEK_DONE 0x02 | |
115 | #define TIMER_DONE 0x01 | |
116 | ||
117 | /* Bits in error register */ | |
118 | #define ERR_DATA_CRC 0x80 | |
119 | #define ERR_ADDR_CRC 0x40 | |
120 | #define ERR_OVERRUN 0x04 | |
121 | #define ERR_UNDERRUN 0x01 | |
122 | ||
123 | /* Bits in setup register */ | |
124 | #define S_SW_RESET 0x80 | |
125 | #define S_GCR_WRITE 0x40 | |
126 | #define S_IBM_DRIVE 0x20 | |
127 | #define S_TEST_MODE 0x10 | |
128 | #define S_FCLK_DIV2 0x08 | |
129 | #define S_GCR 0x04 | |
130 | #define S_COPY_PROT 0x02 | |
131 | #define S_INV_WDATA 0x01 | |
132 | ||
133 | /* Select values for swim3_action */ | |
134 | #define SEEK_POSITIVE 0 | |
135 | #define SEEK_NEGATIVE 4 | |
136 | #define STEP 1 | |
137 | #define MOTOR_ON 2 | |
138 | #define MOTOR_OFF 6 | |
139 | #define INDEX 3 | |
140 | #define EJECT 7 | |
141 | #define SETMFM 9 | |
142 | #define SETGCR 13 | |
143 | ||
144 | /* Select values for swim3_select and swim3_readbit */ | |
145 | #define STEP_DIR 0 | |
146 | #define STEPPING 1 | |
147 | #define MOTOR_ON 2 | |
148 | #define RELAX 3 /* also eject in progress */ | |
149 | #define READ_DATA_0 4 | |
150 | #define TWOMEG_DRIVE 5 | |
151 | #define SINGLE_SIDED 6 /* drive or diskette is 4MB type? */ | |
152 | #define DRIVE_PRESENT 7 | |
153 | #define DISK_IN 8 | |
154 | #define WRITE_PROT 9 | |
155 | #define TRACK_ZERO 10 | |
156 | #define TACHO 11 | |
157 | #define READ_DATA_1 12 | |
158 | #define MFM_MODE 13 | |
159 | #define SEEK_COMPLETE 14 | |
160 | #define ONEMEG_MEDIA 15 | |
161 | ||
162 | /* Definitions of values used in writing and formatting */ | |
163 | #define DATA_ESCAPE 0x99 | |
164 | #define GCR_SYNC_EXC 0x3f | |
165 | #define GCR_SYNC_CONV 0x80 | |
166 | #define GCR_FIRST_MARK 0xd5 | |
167 | #define GCR_SECOND_MARK 0xaa | |
168 | #define GCR_ADDR_MARK "\xd5\xaa\x00" | |
169 | #define GCR_DATA_MARK "\xd5\xaa\x0b" | |
170 | #define GCR_SLIP_BYTE "\x27\xaa" | |
171 | #define GCR_SELF_SYNC "\x3f\xbf\x1e\x34\x3c\x3f" | |
172 | ||
173 | #define DATA_99 "\x99\x99" | |
174 | #define MFM_ADDR_MARK "\x99\xa1\x99\xa1\x99\xa1\x99\xfe" | |
175 | #define MFM_INDEX_MARK "\x99\xc2\x99\xc2\x99\xc2\x99\xfc" | |
176 | #define MFM_GAP_LEN 12 | |
177 | ||
178 | struct floppy_state { | |
179 | enum swim_state state; | |
515729ec | 180 | spinlock_t lock; |
1da177e4 LT |
181 | struct swim3 __iomem *swim3; /* hardware registers */ |
182 | struct dbdma_regs __iomem *dma; /* DMA controller registers */ | |
183 | int swim3_intr; /* interrupt number for SWIM3 */ | |
184 | int dma_intr; /* interrupt number for DMA channel */ | |
185 | int cur_cyl; /* cylinder head is on, or -1 */ | |
186 | int cur_sector; /* last sector we saw go past */ | |
187 | int req_cyl; /* the cylinder for the current r/w request */ | |
188 | int head; /* head number ditto */ | |
189 | int req_sector; /* sector number ditto */ | |
190 | int scount; /* # sectors we're transferring at present */ | |
191 | int retries; | |
192 | int settle_time; | |
193 | int secpercyl; /* disk geometry information */ | |
194 | int secpertrack; | |
195 | int total_secs; | |
196 | int write_prot; /* 1 if write-protected, 0 if not, -1 dunno */ | |
197 | struct dbdma_cmd *dma_cmd; | |
198 | int ref_count; | |
199 | int expect_cyl; | |
200 | struct timer_list timeout; | |
201 | int timeout_pending; | |
202 | int ejected; | |
203 | wait_queue_head_t wait; | |
204 | int wanted; | |
d58b0c39 | 205 | struct macio_dev *mdev; |
1da177e4 LT |
206 | char dbdma_cmd_space[5 * sizeof(struct dbdma_cmd)]; |
207 | }; | |
208 | ||
209 | static struct floppy_state floppy_states[MAX_FLOPPIES]; | |
210 | static int floppy_count = 0; | |
211 | static DEFINE_SPINLOCK(swim3_lock); | |
212 | ||
213 | static unsigned short write_preamble[] = { | |
214 | 0x4e4e, 0x4e4e, 0x4e4e, 0x4e4e, 0x4e4e, /* gap field */ | |
215 | 0, 0, 0, 0, 0, 0, /* sync field */ | |
216 | 0x99a1, 0x99a1, 0x99a1, 0x99fb, /* data address mark */ | |
217 | 0x990f /* no escape for 512 bytes */ | |
218 | }; | |
219 | ||
220 | static unsigned short write_postamble[] = { | |
221 | 0x9904, /* insert CRC */ | |
222 | 0x4e4e, 0x4e4e, | |
223 | 0x9908, /* stop writing */ | |
224 | 0, 0, 0, 0, 0, 0 | |
225 | }; | |
226 | ||
227 | static void swim3_select(struct floppy_state *fs, int sel); | |
228 | static void swim3_action(struct floppy_state *fs, int action); | |
229 | static int swim3_readbit(struct floppy_state *fs, int bit); | |
165125e1 | 230 | static void do_fd_request(struct request_queue * q); |
1da177e4 LT |
231 | static void start_request(struct floppy_state *fs); |
232 | static void set_timeout(struct floppy_state *fs, int nticks, | |
233 | void (*proc)(unsigned long)); | |
234 | static void scan_track(struct floppy_state *fs); | |
235 | static void seek_track(struct floppy_state *fs, int n); | |
236 | static void init_dma(struct dbdma_cmd *cp, int cmd, void *buf, int count); | |
237 | static void setup_transfer(struct floppy_state *fs); | |
238 | static void act(struct floppy_state *fs); | |
239 | static void scan_timeout(unsigned long data); | |
240 | static void seek_timeout(unsigned long data); | |
241 | static void settle_timeout(unsigned long data); | |
242 | static void xfer_timeout(unsigned long data); | |
7d12e780 DH |
243 | static irqreturn_t swim3_interrupt(int irq, void *dev_id); |
244 | /*static void fd_dma_interrupt(int irq, void *dev_id);*/ | |
1da177e4 LT |
245 | static int grab_drive(struct floppy_state *fs, enum swim_state state, |
246 | int interruptible); | |
247 | static void release_drive(struct floppy_state *fs); | |
248 | static int fd_eject(struct floppy_state *fs); | |
b4d9a442 | 249 | static int floppy_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 | 250 | unsigned int cmd, unsigned long param); |
b4d9a442 AV |
251 | static int floppy_open(struct block_device *bdev, fmode_t mode); |
252 | static int floppy_release(struct gendisk *disk, fmode_t mode); | |
1da177e4 LT |
253 | static int floppy_check_change(struct gendisk *disk); |
254 | static int floppy_revalidate(struct gendisk *disk); | |
1da177e4 | 255 | |
f4bd4b90 TH |
256 | static bool swim3_end_request(int err, unsigned int nr_bytes) |
257 | { | |
258 | if (__blk_end_request(fd_req, err, nr_bytes)) | |
259 | return true; | |
260 | ||
261 | fd_req = NULL; | |
262 | return false; | |
263 | } | |
264 | ||
265 | static bool swim3_end_request_cur(int err) | |
266 | { | |
267 | return swim3_end_request(err, blk_rq_cur_bytes(fd_req)); | |
268 | } | |
269 | ||
1da177e4 LT |
270 | static void swim3_select(struct floppy_state *fs, int sel) |
271 | { | |
272 | struct swim3 __iomem *sw = fs->swim3; | |
273 | ||
274 | out_8(&sw->select, RELAX); | |
275 | if (sel & 8) | |
276 | out_8(&sw->control_bis, SELECT); | |
277 | else | |
278 | out_8(&sw->control_bic, SELECT); | |
279 | out_8(&sw->select, sel & CA_MASK); | |
280 | } | |
281 | ||
282 | static void swim3_action(struct floppy_state *fs, int action) | |
283 | { | |
284 | struct swim3 __iomem *sw = fs->swim3; | |
285 | ||
286 | swim3_select(fs, action); | |
287 | udelay(1); | |
288 | out_8(&sw->select, sw->select | LSTRB); | |
289 | udelay(2); | |
290 | out_8(&sw->select, sw->select & ~LSTRB); | |
291 | udelay(1); | |
292 | } | |
293 | ||
294 | static int swim3_readbit(struct floppy_state *fs, int bit) | |
295 | { | |
296 | struct swim3 __iomem *sw = fs->swim3; | |
297 | int stat; | |
298 | ||
299 | swim3_select(fs, bit); | |
300 | udelay(1); | |
301 | stat = in_8(&sw->status); | |
302 | return (stat & DATA) == 0; | |
303 | } | |
304 | ||
165125e1 | 305 | static void do_fd_request(struct request_queue * q) |
1da177e4 LT |
306 | { |
307 | int i; | |
d58b0c39 BH |
308 | |
309 | for(i=0; i<floppy_count; i++) { | |
310 | struct floppy_state *fs = &floppy_states[i]; | |
311 | if (fs->mdev->media_bay && | |
312 | check_media_bay(fs->mdev->media_bay) != MB_FD) | |
1da177e4 | 313 | continue; |
d58b0c39 | 314 | start_request(fs); |
1da177e4 | 315 | } |
1da177e4 LT |
316 | } |
317 | ||
318 | static void start_request(struct floppy_state *fs) | |
319 | { | |
320 | struct request *req; | |
321 | unsigned long x; | |
322 | ||
323 | if (fs->state == idle && fs->wanted) { | |
324 | fs->state = available; | |
325 | wake_up(&fs->wait); | |
326 | return; | |
327 | } | |
f4bd4b90 TH |
328 | while (fs->state == idle) { |
329 | if (!fd_req) { | |
9934c8c0 | 330 | fd_req = blk_fetch_request(swim3_queue); |
f4bd4b90 TH |
331 | if (!fd_req) |
332 | break; | |
f4bd4b90 TH |
333 | } |
334 | req = fd_req; | |
1da177e4 | 335 | #if 0 |
83096ebf | 336 | printk("do_fd_req: dev=%s cmd=%d sec=%ld nr_sec=%u buf=%p\n", |
1da177e4 | 337 | req->rq_disk->disk_name, req->cmd, |
83096ebf TH |
338 | (long)blk_rq_pos(req), blk_rq_sectors(req), req->buffer); |
339 | printk(" errors=%d current_nr_sectors=%u\n", | |
340 | req->errors, blk_rq_cur_sectors(req)); | |
1da177e4 LT |
341 | #endif |
342 | ||
83096ebf | 343 | if (blk_rq_pos(req) >= fs->total_secs) { |
f4bd4b90 | 344 | swim3_end_request_cur(-EIO); |
1da177e4 LT |
345 | continue; |
346 | } | |
1da177e4 | 347 | if (fs->ejected) { |
f4bd4b90 | 348 | swim3_end_request_cur(-EIO); |
1da177e4 LT |
349 | continue; |
350 | } | |
351 | ||
352 | if (rq_data_dir(req) == WRITE) { | |
353 | if (fs->write_prot < 0) | |
354 | fs->write_prot = swim3_readbit(fs, WRITE_PROT); | |
355 | if (fs->write_prot) { | |
f4bd4b90 | 356 | swim3_end_request_cur(-EIO); |
1da177e4 LT |
357 | continue; |
358 | } | |
359 | } | |
360 | ||
83096ebf TH |
361 | /* Do not remove the cast. blk_rq_pos(req) is now a |
362 | * sector_t and can be 64 bits, but it will never go | |
363 | * past 32 bits for this driver anyway, so we can | |
364 | * safely cast it down and not have to do a 64/32 | |
365 | * division | |
1da177e4 | 366 | */ |
83096ebf TH |
367 | fs->req_cyl = ((long)blk_rq_pos(req)) / fs->secpercyl; |
368 | x = ((long)blk_rq_pos(req)) % fs->secpercyl; | |
1da177e4 LT |
369 | fs->head = x / fs->secpertrack; |
370 | fs->req_sector = x % fs->secpertrack + 1; | |
371 | fd_req = req; | |
372 | fs->state = do_transfer; | |
373 | fs->retries = 0; | |
374 | ||
375 | act(fs); | |
376 | } | |
377 | } | |
378 | ||
379 | static void set_timeout(struct floppy_state *fs, int nticks, | |
380 | void (*proc)(unsigned long)) | |
381 | { | |
382 | unsigned long flags; | |
383 | ||
515729ec | 384 | spin_lock_irqsave(&fs->lock, flags); |
1da177e4 LT |
385 | if (fs->timeout_pending) |
386 | del_timer(&fs->timeout); | |
387 | fs->timeout.expires = jiffies + nticks; | |
388 | fs->timeout.function = proc; | |
389 | fs->timeout.data = (unsigned long) fs; | |
390 | add_timer(&fs->timeout); | |
391 | fs->timeout_pending = 1; | |
515729ec | 392 | spin_unlock_irqrestore(&fs->lock, flags); |
1da177e4 LT |
393 | } |
394 | ||
395 | static inline void scan_track(struct floppy_state *fs) | |
396 | { | |
397 | struct swim3 __iomem *sw = fs->swim3; | |
398 | ||
399 | swim3_select(fs, READ_DATA_0); | |
400 | in_8(&sw->intr); /* clear SEEN_SECTOR bit */ | |
401 | in_8(&sw->error); | |
402 | out_8(&sw->intr_enable, SEEN_SECTOR); | |
403 | out_8(&sw->control_bis, DO_ACTION); | |
404 | /* enable intr when track found */ | |
405 | set_timeout(fs, HZ, scan_timeout); /* enable timeout */ | |
406 | } | |
407 | ||
408 | static inline void seek_track(struct floppy_state *fs, int n) | |
409 | { | |
410 | struct swim3 __iomem *sw = fs->swim3; | |
411 | ||
412 | if (n >= 0) { | |
413 | swim3_action(fs, SEEK_POSITIVE); | |
414 | sw->nseek = n; | |
415 | } else { | |
416 | swim3_action(fs, SEEK_NEGATIVE); | |
417 | sw->nseek = -n; | |
418 | } | |
419 | fs->expect_cyl = (fs->cur_cyl >= 0)? fs->cur_cyl + n: -1; | |
420 | swim3_select(fs, STEP); | |
421 | in_8(&sw->error); | |
422 | /* enable intr when seek finished */ | |
423 | out_8(&sw->intr_enable, SEEK_DONE); | |
424 | out_8(&sw->control_bis, DO_SEEK); | |
425 | set_timeout(fs, 3*HZ, seek_timeout); /* enable timeout */ | |
426 | fs->settle_time = 0; | |
427 | } | |
428 | ||
429 | static inline void init_dma(struct dbdma_cmd *cp, int cmd, | |
430 | void *buf, int count) | |
431 | { | |
432 | st_le16(&cp->req_count, count); | |
433 | st_le16(&cp->command, cmd); | |
434 | st_le32(&cp->phy_addr, virt_to_bus(buf)); | |
435 | cp->xfer_status = 0; | |
436 | } | |
437 | ||
438 | static inline void setup_transfer(struct floppy_state *fs) | |
439 | { | |
440 | int n; | |
441 | struct swim3 __iomem *sw = fs->swim3; | |
442 | struct dbdma_cmd *cp = fs->dma_cmd; | |
443 | struct dbdma_regs __iomem *dr = fs->dma; | |
444 | ||
83096ebf | 445 | if (blk_rq_cur_sectors(fd_req) <= 0) { |
1da177e4 LT |
446 | printk(KERN_ERR "swim3: transfer 0 sectors?\n"); |
447 | return; | |
448 | } | |
449 | if (rq_data_dir(fd_req) == WRITE) | |
450 | n = 1; | |
451 | else { | |
452 | n = fs->secpertrack - fs->req_sector + 1; | |
83096ebf TH |
453 | if (n > blk_rq_cur_sectors(fd_req)) |
454 | n = blk_rq_cur_sectors(fd_req); | |
1da177e4 LT |
455 | } |
456 | fs->scount = n; | |
457 | swim3_select(fs, fs->head? READ_DATA_1: READ_DATA_0); | |
458 | out_8(&sw->sector, fs->req_sector); | |
459 | out_8(&sw->nsect, n); | |
460 | out_8(&sw->gap3, 0); | |
461 | out_le32(&dr->cmdptr, virt_to_bus(cp)); | |
462 | if (rq_data_dir(fd_req) == WRITE) { | |
463 | /* Set up 3 dma commands: write preamble, data, postamble */ | |
464 | init_dma(cp, OUTPUT_MORE, write_preamble, sizeof(write_preamble)); | |
465 | ++cp; | |
466 | init_dma(cp, OUTPUT_MORE, fd_req->buffer, 512); | |
467 | ++cp; | |
468 | init_dma(cp, OUTPUT_LAST, write_postamble, sizeof(write_postamble)); | |
469 | } else { | |
470 | init_dma(cp, INPUT_LAST, fd_req->buffer, n * 512); | |
471 | } | |
472 | ++cp; | |
473 | out_le16(&cp->command, DBDMA_STOP); | |
474 | out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS); | |
475 | in_8(&sw->error); | |
476 | out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS); | |
477 | if (rq_data_dir(fd_req) == WRITE) | |
478 | out_8(&sw->control_bis, WRITE_SECTORS); | |
479 | in_8(&sw->intr); | |
480 | out_le32(&dr->control, (RUN << 16) | RUN); | |
481 | /* enable intr when transfer complete */ | |
482 | out_8(&sw->intr_enable, TRANSFER_DONE); | |
483 | out_8(&sw->control_bis, DO_ACTION); | |
484 | set_timeout(fs, 2*HZ, xfer_timeout); /* enable timeout */ | |
485 | } | |
486 | ||
487 | static void act(struct floppy_state *fs) | |
488 | { | |
489 | for (;;) { | |
490 | switch (fs->state) { | |
491 | case idle: | |
492 | return; /* XXX shouldn't get here */ | |
493 | ||
494 | case locating: | |
495 | if (swim3_readbit(fs, TRACK_ZERO)) { | |
496 | fs->cur_cyl = 0; | |
497 | if (fs->req_cyl == 0) | |
498 | fs->state = do_transfer; | |
499 | else | |
500 | fs->state = seeking; | |
501 | break; | |
502 | } | |
503 | scan_track(fs); | |
504 | return; | |
505 | ||
506 | case seeking: | |
507 | if (fs->cur_cyl < 0) { | |
508 | fs->expect_cyl = -1; | |
509 | fs->state = locating; | |
510 | break; | |
511 | } | |
512 | if (fs->req_cyl == fs->cur_cyl) { | |
513 | printk("whoops, seeking 0\n"); | |
514 | fs->state = do_transfer; | |
515 | break; | |
516 | } | |
517 | seek_track(fs, fs->req_cyl - fs->cur_cyl); | |
518 | return; | |
519 | ||
520 | case settling: | |
521 | /* check for SEEK_COMPLETE after 30ms */ | |
522 | fs->settle_time = (HZ + 32) / 33; | |
523 | set_timeout(fs, fs->settle_time, settle_timeout); | |
524 | return; | |
525 | ||
526 | case do_transfer: | |
527 | if (fs->cur_cyl != fs->req_cyl) { | |
528 | if (fs->retries > 5) { | |
f4bd4b90 | 529 | swim3_end_request_cur(-EIO); |
1da177e4 LT |
530 | fs->state = idle; |
531 | return; | |
532 | } | |
533 | fs->state = seeking; | |
534 | break; | |
535 | } | |
536 | setup_transfer(fs); | |
537 | return; | |
538 | ||
539 | case jogging: | |
540 | seek_track(fs, -5); | |
541 | return; | |
542 | ||
543 | default: | |
544 | printk(KERN_ERR"swim3: unknown state %d\n", fs->state); | |
545 | return; | |
546 | } | |
547 | } | |
548 | } | |
549 | ||
550 | static void scan_timeout(unsigned long data) | |
551 | { | |
552 | struct floppy_state *fs = (struct floppy_state *) data; | |
553 | struct swim3 __iomem *sw = fs->swim3; | |
554 | ||
555 | fs->timeout_pending = 0; | |
556 | out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS); | |
557 | out_8(&sw->select, RELAX); | |
558 | out_8(&sw->intr_enable, 0); | |
559 | fs->cur_cyl = -1; | |
560 | if (fs->retries > 5) { | |
f4bd4b90 | 561 | swim3_end_request_cur(-EIO); |
1da177e4 LT |
562 | fs->state = idle; |
563 | start_request(fs); | |
564 | } else { | |
565 | fs->state = jogging; | |
566 | act(fs); | |
567 | } | |
568 | } | |
569 | ||
570 | static void seek_timeout(unsigned long data) | |
571 | { | |
572 | struct floppy_state *fs = (struct floppy_state *) data; | |
573 | struct swim3 __iomem *sw = fs->swim3; | |
574 | ||
575 | fs->timeout_pending = 0; | |
576 | out_8(&sw->control_bic, DO_SEEK); | |
577 | out_8(&sw->select, RELAX); | |
578 | out_8(&sw->intr_enable, 0); | |
579 | printk(KERN_ERR "swim3: seek timeout\n"); | |
f4bd4b90 | 580 | swim3_end_request_cur(-EIO); |
1da177e4 LT |
581 | fs->state = idle; |
582 | start_request(fs); | |
583 | } | |
584 | ||
585 | static void settle_timeout(unsigned long data) | |
586 | { | |
587 | struct floppy_state *fs = (struct floppy_state *) data; | |
588 | struct swim3 __iomem *sw = fs->swim3; | |
589 | ||
590 | fs->timeout_pending = 0; | |
591 | if (swim3_readbit(fs, SEEK_COMPLETE)) { | |
592 | out_8(&sw->select, RELAX); | |
593 | fs->state = locating; | |
594 | act(fs); | |
595 | return; | |
596 | } | |
597 | out_8(&sw->select, RELAX); | |
598 | if (fs->settle_time < 2*HZ) { | |
599 | ++fs->settle_time; | |
600 | set_timeout(fs, 1, settle_timeout); | |
601 | return; | |
602 | } | |
603 | printk(KERN_ERR "swim3: seek settle timeout\n"); | |
f4bd4b90 | 604 | swim3_end_request_cur(-EIO); |
1da177e4 LT |
605 | fs->state = idle; |
606 | start_request(fs); | |
607 | } | |
608 | ||
609 | static void xfer_timeout(unsigned long data) | |
610 | { | |
611 | struct floppy_state *fs = (struct floppy_state *) data; | |
612 | struct swim3 __iomem *sw = fs->swim3; | |
613 | struct dbdma_regs __iomem *dr = fs->dma; | |
1da177e4 LT |
614 | int n; |
615 | ||
616 | fs->timeout_pending = 0; | |
617 | out_le32(&dr->control, RUN << 16); | |
618 | /* We must wait a bit for dbdma to stop */ | |
619 | for (n = 0; (in_le32(&dr->status) & ACTIVE) && n < 1000; n++) | |
620 | udelay(1); | |
621 | out_8(&sw->intr_enable, 0); | |
622 | out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION); | |
623 | out_8(&sw->select, RELAX); | |
1da177e4 | 624 | printk(KERN_ERR "swim3: timeout %sing sector %ld\n", |
83096ebf TH |
625 | (rq_data_dir(fd_req)==WRITE? "writ": "read"), |
626 | (long)blk_rq_pos(fd_req)); | |
f4bd4b90 | 627 | swim3_end_request_cur(-EIO); |
1da177e4 LT |
628 | fs->state = idle; |
629 | start_request(fs); | |
630 | } | |
631 | ||
7d12e780 | 632 | static irqreturn_t swim3_interrupt(int irq, void *dev_id) |
1da177e4 LT |
633 | { |
634 | struct floppy_state *fs = (struct floppy_state *) dev_id; | |
635 | struct swim3 __iomem *sw = fs->swim3; | |
636 | int intr, err, n; | |
637 | int stat, resid; | |
638 | struct dbdma_regs __iomem *dr; | |
639 | struct dbdma_cmd *cp; | |
640 | ||
641 | intr = in_8(&sw->intr); | |
642 | err = (intr & ERROR_INTR)? in_8(&sw->error): 0; | |
643 | if ((intr & ERROR_INTR) && fs->state != do_transfer) | |
14b1ffb5 | 644 | printk(KERN_ERR "swim3_interrupt, state=%d, dir=%x, intr=%x, err=%x\n", |
1da177e4 LT |
645 | fs->state, rq_data_dir(fd_req), intr, err); |
646 | switch (fs->state) { | |
647 | case locating: | |
648 | if (intr & SEEN_SECTOR) { | |
649 | out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS); | |
650 | out_8(&sw->select, RELAX); | |
651 | out_8(&sw->intr_enable, 0); | |
652 | del_timer(&fs->timeout); | |
653 | fs->timeout_pending = 0; | |
654 | if (sw->ctrack == 0xff) { | |
655 | printk(KERN_ERR "swim3: seen sector but cyl=ff?\n"); | |
656 | fs->cur_cyl = -1; | |
657 | if (fs->retries > 5) { | |
f4bd4b90 | 658 | swim3_end_request_cur(-EIO); |
1da177e4 LT |
659 | fs->state = idle; |
660 | start_request(fs); | |
661 | } else { | |
662 | fs->state = jogging; | |
663 | act(fs); | |
664 | } | |
665 | break; | |
666 | } | |
667 | fs->cur_cyl = sw->ctrack; | |
668 | fs->cur_sector = sw->csect; | |
669 | if (fs->expect_cyl != -1 && fs->expect_cyl != fs->cur_cyl) | |
670 | printk(KERN_ERR "swim3: expected cyl %d, got %d\n", | |
671 | fs->expect_cyl, fs->cur_cyl); | |
672 | fs->state = do_transfer; | |
673 | act(fs); | |
674 | } | |
675 | break; | |
676 | case seeking: | |
677 | case jogging: | |
678 | if (sw->nseek == 0) { | |
679 | out_8(&sw->control_bic, DO_SEEK); | |
680 | out_8(&sw->select, RELAX); | |
681 | out_8(&sw->intr_enable, 0); | |
682 | del_timer(&fs->timeout); | |
683 | fs->timeout_pending = 0; | |
684 | if (fs->state == seeking) | |
685 | ++fs->retries; | |
686 | fs->state = settling; | |
687 | act(fs); | |
688 | } | |
689 | break; | |
690 | case settling: | |
691 | out_8(&sw->intr_enable, 0); | |
692 | del_timer(&fs->timeout); | |
693 | fs->timeout_pending = 0; | |
694 | act(fs); | |
695 | break; | |
696 | case do_transfer: | |
697 | if ((intr & (ERROR_INTR | TRANSFER_DONE)) == 0) | |
698 | break; | |
699 | out_8(&sw->intr_enable, 0); | |
700 | out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION); | |
701 | out_8(&sw->select, RELAX); | |
702 | del_timer(&fs->timeout); | |
703 | fs->timeout_pending = 0; | |
704 | dr = fs->dma; | |
705 | cp = fs->dma_cmd; | |
706 | if (rq_data_dir(fd_req) == WRITE) | |
707 | ++cp; | |
708 | /* | |
709 | * Check that the main data transfer has finished. | |
710 | * On writing, the swim3 sometimes doesn't use | |
711 | * up all the bytes of the postamble, so we can still | |
712 | * see DMA active here. That doesn't matter as long | |
713 | * as all the sector data has been transferred. | |
714 | */ | |
715 | if ((intr & ERROR_INTR) == 0 && cp->xfer_status == 0) { | |
716 | /* wait a little while for DMA to complete */ | |
717 | for (n = 0; n < 100; ++n) { | |
718 | if (cp->xfer_status != 0) | |
719 | break; | |
720 | udelay(1); | |
721 | barrier(); | |
722 | } | |
723 | } | |
724 | /* turn off DMA */ | |
725 | out_le32(&dr->control, (RUN | PAUSE) << 16); | |
726 | stat = ld_le16(&cp->xfer_status); | |
727 | resid = ld_le16(&cp->res_count); | |
728 | if (intr & ERROR_INTR) { | |
729 | n = fs->scount - 1 - resid / 512; | |
730 | if (n > 0) { | |
467ca759 | 731 | blk_update_request(fd_req, 0, n << 9); |
1da177e4 LT |
732 | fs->req_sector += n; |
733 | } | |
734 | if (fs->retries < 5) { | |
735 | ++fs->retries; | |
736 | act(fs); | |
737 | } else { | |
738 | printk("swim3: error %sing block %ld (err=%x)\n", | |
739 | rq_data_dir(fd_req) == WRITE? "writ": "read", | |
83096ebf | 740 | (long)blk_rq_pos(fd_req), err); |
f4bd4b90 | 741 | swim3_end_request_cur(-EIO); |
1da177e4 LT |
742 | fs->state = idle; |
743 | } | |
744 | } else { | |
745 | if ((stat & ACTIVE) == 0 || resid != 0) { | |
746 | /* musta been an error */ | |
747 | printk(KERN_ERR "swim3: fd dma: stat=%x resid=%d\n", stat, resid); | |
14b1ffb5 | 748 | printk(KERN_ERR " state=%d, dir=%x, intr=%x, err=%x\n", |
1da177e4 | 749 | fs->state, rq_data_dir(fd_req), intr, err); |
f4bd4b90 | 750 | swim3_end_request_cur(-EIO); |
1da177e4 LT |
751 | fs->state = idle; |
752 | start_request(fs); | |
753 | break; | |
754 | } | |
f4bd4b90 | 755 | if (swim3_end_request(0, fs->scount << 9)) { |
1da177e4 LT |
756 | fs->req_sector += fs->scount; |
757 | if (fs->req_sector > fs->secpertrack) { | |
758 | fs->req_sector -= fs->secpertrack; | |
759 | if (++fs->head > 1) { | |
760 | fs->head = 0; | |
761 | ++fs->req_cyl; | |
762 | } | |
763 | } | |
764 | act(fs); | |
467ca759 TH |
765 | } else |
766 | fs->state = idle; | |
1da177e4 LT |
767 | } |
768 | if (fs->state == idle) | |
769 | start_request(fs); | |
770 | break; | |
771 | default: | |
772 | printk(KERN_ERR "swim3: don't know what to do in state %d\n", fs->state); | |
773 | } | |
774 | return IRQ_HANDLED; | |
775 | } | |
776 | ||
777 | /* | |
7d12e780 | 778 | static void fd_dma_interrupt(int irq, void *dev_id) |
1da177e4 LT |
779 | { |
780 | } | |
781 | */ | |
782 | ||
783 | static int grab_drive(struct floppy_state *fs, enum swim_state state, | |
784 | int interruptible) | |
785 | { | |
786 | unsigned long flags; | |
787 | ||
515729ec | 788 | spin_lock_irqsave(&fs->lock, flags); |
1da177e4 LT |
789 | if (fs->state != idle) { |
790 | ++fs->wanted; | |
791 | while (fs->state != available) { | |
792 | if (interruptible && signal_pending(current)) { | |
793 | --fs->wanted; | |
515729ec | 794 | spin_unlock_irqrestore(&fs->lock, flags); |
1da177e4 LT |
795 | return -EINTR; |
796 | } | |
797 | interruptible_sleep_on(&fs->wait); | |
798 | } | |
799 | --fs->wanted; | |
800 | } | |
801 | fs->state = state; | |
515729ec | 802 | spin_unlock_irqrestore(&fs->lock, flags); |
1da177e4 LT |
803 | return 0; |
804 | } | |
805 | ||
806 | static void release_drive(struct floppy_state *fs) | |
807 | { | |
808 | unsigned long flags; | |
809 | ||
515729ec | 810 | spin_lock_irqsave(&fs->lock, flags); |
1da177e4 LT |
811 | fs->state = idle; |
812 | start_request(fs); | |
515729ec | 813 | spin_unlock_irqrestore(&fs->lock, flags); |
1da177e4 LT |
814 | } |
815 | ||
816 | static int fd_eject(struct floppy_state *fs) | |
817 | { | |
818 | int err, n; | |
819 | ||
820 | err = grab_drive(fs, ejecting, 1); | |
821 | if (err) | |
822 | return err; | |
823 | swim3_action(fs, EJECT); | |
824 | for (n = 20; n > 0; --n) { | |
825 | if (signal_pending(current)) { | |
826 | err = -EINTR; | |
827 | break; | |
828 | } | |
829 | swim3_select(fs, RELAX); | |
86e84862 | 830 | schedule_timeout_interruptible(1); |
1da177e4 LT |
831 | if (swim3_readbit(fs, DISK_IN) == 0) |
832 | break; | |
833 | } | |
834 | swim3_select(fs, RELAX); | |
835 | udelay(150); | |
836 | fs->ejected = 1; | |
837 | release_drive(fs); | |
838 | return err; | |
839 | } | |
840 | ||
841 | static struct floppy_struct floppy_type = | |
842 | { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,NULL }; /* 7 1.44MB 3.5" */ | |
843 | ||
8a6cfeb6 | 844 | static int floppy_locked_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
845 | unsigned int cmd, unsigned long param) |
846 | { | |
b4d9a442 | 847 | struct floppy_state *fs = bdev->bd_disk->private_data; |
1da177e4 LT |
848 | int err; |
849 | ||
850 | if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)) | |
851 | return -EPERM; | |
852 | ||
d58b0c39 BH |
853 | if (fs->mdev->media_bay && |
854 | check_media_bay(fs->mdev->media_bay) != MB_FD) | |
1da177e4 LT |
855 | return -ENXIO; |
856 | ||
857 | switch (cmd) { | |
858 | case FDEJECT: | |
859 | if (fs->ref_count != 1) | |
860 | return -EBUSY; | |
861 | err = fd_eject(fs); | |
862 | return err; | |
863 | case FDGETPRM: | |
864 | if (copy_to_user((void __user *) param, &floppy_type, | |
865 | sizeof(struct floppy_struct))) | |
866 | return -EFAULT; | |
867 | return 0; | |
868 | } | |
869 | return -ENOTTY; | |
870 | } | |
871 | ||
8a6cfeb6 AB |
872 | static int floppy_ioctl(struct block_device *bdev, fmode_t mode, |
873 | unsigned int cmd, unsigned long param) | |
874 | { | |
875 | int ret; | |
876 | ||
2a48fc0a | 877 | mutex_lock(&swim3_mutex); |
8a6cfeb6 | 878 | ret = floppy_locked_ioctl(bdev, mode, cmd, param); |
2a48fc0a | 879 | mutex_unlock(&swim3_mutex); |
8a6cfeb6 AB |
880 | |
881 | return ret; | |
882 | } | |
883 | ||
b4d9a442 | 884 | static int floppy_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 885 | { |
b4d9a442 | 886 | struct floppy_state *fs = bdev->bd_disk->private_data; |
1da177e4 LT |
887 | struct swim3 __iomem *sw = fs->swim3; |
888 | int n, err = 0; | |
889 | ||
890 | if (fs->ref_count == 0) { | |
d58b0c39 BH |
891 | if (fs->mdev->media_bay && |
892 | check_media_bay(fs->mdev->media_bay) != MB_FD) | |
1da177e4 LT |
893 | return -ENXIO; |
894 | out_8(&sw->setup, S_IBM_DRIVE | S_FCLK_DIV2); | |
895 | out_8(&sw->control_bic, 0xff); | |
896 | out_8(&sw->mode, 0x95); | |
897 | udelay(10); | |
898 | out_8(&sw->intr_enable, 0); | |
899 | out_8(&sw->control_bis, DRIVE_ENABLE | INTR_ENABLE); | |
900 | swim3_action(fs, MOTOR_ON); | |
901 | fs->write_prot = -1; | |
902 | fs->cur_cyl = -1; | |
903 | for (n = 0; n < 2 * HZ; ++n) { | |
904 | if (n >= HZ/30 && swim3_readbit(fs, SEEK_COMPLETE)) | |
905 | break; | |
906 | if (signal_pending(current)) { | |
907 | err = -EINTR; | |
908 | break; | |
909 | } | |
910 | swim3_select(fs, RELAX); | |
86e84862 | 911 | schedule_timeout_interruptible(1); |
1da177e4 LT |
912 | } |
913 | if (err == 0 && (swim3_readbit(fs, SEEK_COMPLETE) == 0 | |
914 | || swim3_readbit(fs, DISK_IN) == 0)) | |
915 | err = -ENXIO; | |
916 | swim3_action(fs, SETMFM); | |
917 | swim3_select(fs, RELAX); | |
918 | ||
b4d9a442 | 919 | } else if (fs->ref_count == -1 || mode & FMODE_EXCL) |
1da177e4 LT |
920 | return -EBUSY; |
921 | ||
b4d9a442 AV |
922 | if (err == 0 && (mode & FMODE_NDELAY) == 0 |
923 | && (mode & (FMODE_READ|FMODE_WRITE))) { | |
924 | check_disk_change(bdev); | |
1da177e4 LT |
925 | if (fs->ejected) |
926 | err = -ENXIO; | |
927 | } | |
928 | ||
b4d9a442 | 929 | if (err == 0 && (mode & FMODE_WRITE)) { |
1da177e4 LT |
930 | if (fs->write_prot < 0) |
931 | fs->write_prot = swim3_readbit(fs, WRITE_PROT); | |
932 | if (fs->write_prot) | |
933 | err = -EROFS; | |
934 | } | |
935 | ||
936 | if (err) { | |
937 | if (fs->ref_count == 0) { | |
938 | swim3_action(fs, MOTOR_OFF); | |
939 | out_8(&sw->control_bic, DRIVE_ENABLE | INTR_ENABLE); | |
940 | swim3_select(fs, RELAX); | |
941 | } | |
942 | return err; | |
943 | } | |
944 | ||
b4d9a442 | 945 | if (mode & FMODE_EXCL) |
1da177e4 LT |
946 | fs->ref_count = -1; |
947 | else | |
948 | ++fs->ref_count; | |
949 | ||
950 | return 0; | |
951 | } | |
952 | ||
6e9624b8 AB |
953 | static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode) |
954 | { | |
955 | int ret; | |
956 | ||
2a48fc0a | 957 | mutex_lock(&swim3_mutex); |
6e9624b8 | 958 | ret = floppy_open(bdev, mode); |
2a48fc0a | 959 | mutex_unlock(&swim3_mutex); |
6e9624b8 AB |
960 | |
961 | return ret; | |
962 | } | |
963 | ||
b4d9a442 | 964 | static int floppy_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 965 | { |
b4d9a442 | 966 | struct floppy_state *fs = disk->private_data; |
1da177e4 | 967 | struct swim3 __iomem *sw = fs->swim3; |
2a48fc0a | 968 | mutex_lock(&swim3_mutex); |
1da177e4 LT |
969 | if (fs->ref_count > 0 && --fs->ref_count == 0) { |
970 | swim3_action(fs, MOTOR_OFF); | |
971 | out_8(&sw->control_bic, 0xff); | |
972 | swim3_select(fs, RELAX); | |
973 | } | |
2a48fc0a | 974 | mutex_unlock(&swim3_mutex); |
1da177e4 LT |
975 | return 0; |
976 | } | |
977 | ||
978 | static int floppy_check_change(struct gendisk *disk) | |
979 | { | |
980 | struct floppy_state *fs = disk->private_data; | |
981 | return fs->ejected; | |
982 | } | |
983 | ||
984 | static int floppy_revalidate(struct gendisk *disk) | |
985 | { | |
986 | struct floppy_state *fs = disk->private_data; | |
987 | struct swim3 __iomem *sw; | |
988 | int ret, n; | |
989 | ||
d58b0c39 BH |
990 | if (fs->mdev->media_bay && |
991 | check_media_bay(fs->mdev->media_bay) != MB_FD) | |
1da177e4 LT |
992 | return -ENXIO; |
993 | ||
994 | sw = fs->swim3; | |
995 | grab_drive(fs, revalidating, 0); | |
996 | out_8(&sw->intr_enable, 0); | |
997 | out_8(&sw->control_bis, DRIVE_ENABLE); | |
998 | swim3_action(fs, MOTOR_ON); /* necessary? */ | |
999 | fs->write_prot = -1; | |
1000 | fs->cur_cyl = -1; | |
1001 | mdelay(1); | |
1002 | for (n = HZ; n > 0; --n) { | |
1003 | if (swim3_readbit(fs, SEEK_COMPLETE)) | |
1004 | break; | |
1005 | if (signal_pending(current)) | |
1006 | break; | |
1007 | swim3_select(fs, RELAX); | |
86e84862 | 1008 | schedule_timeout_interruptible(1); |
1da177e4 LT |
1009 | } |
1010 | ret = swim3_readbit(fs, SEEK_COMPLETE) == 0 | |
1011 | || swim3_readbit(fs, DISK_IN) == 0; | |
1012 | if (ret) | |
1013 | swim3_action(fs, MOTOR_OFF); | |
1014 | else { | |
1015 | fs->ejected = 0; | |
1016 | swim3_action(fs, SETMFM); | |
1017 | } | |
1018 | swim3_select(fs, RELAX); | |
1019 | ||
1020 | release_drive(fs); | |
1021 | return ret; | |
1022 | } | |
1023 | ||
83d5cde4 | 1024 | static const struct block_device_operations floppy_fops = { |
6e9624b8 | 1025 | .open = floppy_unlocked_open, |
b4d9a442 | 1026 | .release = floppy_release, |
8a6cfeb6 | 1027 | .ioctl = floppy_ioctl, |
1da177e4 LT |
1028 | .media_changed = floppy_check_change, |
1029 | .revalidate_disk= floppy_revalidate, | |
1030 | }; | |
1031 | ||
3e9a6927 | 1032 | static int swim3_add_device(struct macio_dev *mdev, int index) |
1da177e4 | 1033 | { |
61c7a080 | 1034 | struct device_node *swim = mdev->ofdev.dev.of_node; |
3e9a6927 BH |
1035 | struct floppy_state *fs = &floppy_states[index]; |
1036 | int rc = -EBUSY; | |
1da177e4 | 1037 | |
3e9a6927 BH |
1038 | /* Check & Request resources */ |
1039 | if (macio_resource_count(mdev) < 2) { | |
1040 | printk(KERN_WARNING "ifd%d: no address for %s\n", | |
1041 | index, swim->full_name); | |
1042 | return -ENXIO; | |
1da177e4 | 1043 | } |
3e9a6927 BH |
1044 | if (macio_irq_count(mdev) < 2) { |
1045 | printk(KERN_WARNING "fd%d: no intrs for device %s\n", | |
1046 | index, swim->full_name); | |
cc5d0189 | 1047 | } |
3e9a6927 BH |
1048 | if (macio_request_resource(mdev, 0, "swim3 (mmio)")) { |
1049 | printk(KERN_ERR "fd%d: can't request mmio resource for %s\n", | |
1050 | index, swim->full_name); | |
1051 | return -EBUSY; | |
1da177e4 | 1052 | } |
3e9a6927 BH |
1053 | if (macio_request_resource(mdev, 1, "swim3 (dma)")) { |
1054 | printk(KERN_ERR "fd%d: can't request dma resource for %s\n", | |
1055 | index, swim->full_name); | |
1056 | macio_release_resource(mdev, 0); | |
1057 | return -EBUSY; | |
1da177e4 | 1058 | } |
3e9a6927 | 1059 | dev_set_drvdata(&mdev->ofdev.dev, fs); |
1da177e4 | 1060 | |
d58b0c39 | 1061 | if (mdev->media_bay == NULL) |
1da177e4 LT |
1062 | pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 1); |
1063 | ||
1064 | memset(fs, 0, sizeof(*fs)); | |
515729ec | 1065 | spin_lock_init(&fs->lock); |
1da177e4 | 1066 | fs->state = idle; |
3e9a6927 BH |
1067 | fs->swim3 = (struct swim3 __iomem *) |
1068 | ioremap(macio_resource_start(mdev, 0), 0x200); | |
1069 | if (fs->swim3 == NULL) { | |
1070 | printk("fd%d: couldn't map registers for %s\n", | |
1071 | index, swim->full_name); | |
1072 | rc = -ENOMEM; | |
1073 | goto out_release; | |
1074 | } | |
1075 | fs->dma = (struct dbdma_regs __iomem *) | |
1076 | ioremap(macio_resource_start(mdev, 1), 0x200); | |
1077 | if (fs->dma == NULL) { | |
1078 | printk("fd%d: couldn't map DMA for %s\n", | |
1079 | index, swim->full_name); | |
1080 | iounmap(fs->swim3); | |
1081 | rc = -ENOMEM; | |
1082 | goto out_release; | |
1083 | } | |
1084 | fs->swim3_intr = macio_irq(mdev, 0); | |
a419aef8 | 1085 | fs->dma_intr = macio_irq(mdev, 1); |
1da177e4 LT |
1086 | fs->cur_cyl = -1; |
1087 | fs->cur_sector = -1; | |
1088 | fs->secpercyl = 36; | |
1089 | fs->secpertrack = 18; | |
1090 | fs->total_secs = 2880; | |
d58b0c39 | 1091 | fs->mdev = mdev; |
1da177e4 LT |
1092 | init_waitqueue_head(&fs->wait); |
1093 | ||
1094 | fs->dma_cmd = (struct dbdma_cmd *) DBDMA_ALIGN(fs->dbdma_cmd_space); | |
1095 | memset(fs->dma_cmd, 0, 2 * sizeof(struct dbdma_cmd)); | |
1096 | st_le16(&fs->dma_cmd[1].command, DBDMA_STOP); | |
1097 | ||
1098 | if (request_irq(fs->swim3_intr, swim3_interrupt, 0, "SWIM3", fs)) { | |
3e9a6927 BH |
1099 | printk(KERN_ERR "fd%d: couldn't request irq %d for %s\n", |
1100 | index, fs->swim3_intr, swim->full_name); | |
1da177e4 | 1101 | pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 0); |
3e9a6927 | 1102 | goto out_unmap; |
1da177e4 LT |
1103 | return -EBUSY; |
1104 | } | |
1105 | /* | |
1106 | if (request_irq(fs->dma_intr, fd_dma_interrupt, 0, "SWIM3-dma", fs)) { | |
1107 | printk(KERN_ERR "Couldn't get irq %d for SWIM3 DMA", | |
1108 | fs->dma_intr); | |
1da177e4 LT |
1109 | return -EBUSY; |
1110 | } | |
1111 | */ | |
1112 | ||
1113 | init_timer(&fs->timeout); | |
1114 | ||
1115 | printk(KERN_INFO "fd%d: SWIM3 floppy controller %s\n", floppy_count, | |
d58b0c39 | 1116 | mdev->media_bay ? "in media bay" : ""); |
1da177e4 | 1117 | |
3e9a6927 BH |
1118 | return 0; |
1119 | ||
1120 | out_unmap: | |
1121 | iounmap(fs->dma); | |
1122 | iounmap(fs->swim3); | |
1123 | ||
1124 | out_release: | |
1125 | macio_release_resource(mdev, 0); | |
1126 | macio_release_resource(mdev, 1); | |
1127 | ||
1128 | return rc; | |
1129 | } | |
1130 | ||
1131 | static int __devinit swim3_attach(struct macio_dev *mdev, const struct of_device_id *match) | |
1132 | { | |
1133 | int i, rc; | |
1134 | struct gendisk *disk; | |
1135 | ||
1136 | /* Add the drive */ | |
1137 | rc = swim3_add_device(mdev, floppy_count); | |
1138 | if (rc) | |
1139 | return rc; | |
1140 | ||
1141 | /* Now create the queue if not there yet */ | |
1142 | if (swim3_queue == NULL) { | |
1143 | /* If we failed, there isn't much we can do as the driver is still | |
1144 | * too dumb to remove the device, just bail out | |
1145 | */ | |
1146 | if (register_blkdev(FLOPPY_MAJOR, "fd")) | |
1147 | return 0; | |
1148 | swim3_queue = blk_init_queue(do_fd_request, &swim3_lock); | |
1149 | if (swim3_queue == NULL) { | |
1150 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1151 | return 0; | |
1152 | } | |
1153 | } | |
1154 | ||
1155 | /* Now register that disk. Same comment about failure handling */ | |
1156 | i = floppy_count++; | |
1157 | disk = disks[i] = alloc_disk(1); | |
1158 | if (disk == NULL) | |
1159 | return 0; | |
1160 | ||
1161 | disk->major = FLOPPY_MAJOR; | |
1162 | disk->first_minor = i; | |
1163 | disk->fops = &floppy_fops; | |
1164 | disk->private_data = &floppy_states[i]; | |
1165 | disk->queue = swim3_queue; | |
1166 | disk->flags |= GENHD_FL_REMOVABLE; | |
1167 | sprintf(disk->disk_name, "fd%d", i); | |
1168 | set_capacity(disk, 2880); | |
1169 | add_disk(disk); | |
1170 | ||
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | static struct of_device_id swim3_match[] = | |
1175 | { | |
1176 | { | |
1177 | .name = "swim3", | |
1178 | }, | |
1179 | { | |
1180 | .compatible = "ohare-swim3" | |
1181 | }, | |
1182 | { | |
1183 | .compatible = "swim3" | |
1184 | }, | |
1185 | }; | |
1186 | ||
1187 | static struct macio_driver swim3_driver = | |
1188 | { | |
c2cdf6ab BH |
1189 | .driver = { |
1190 | .name = "swim3", | |
1191 | .of_match_table = swim3_match, | |
1192 | }, | |
3e9a6927 BH |
1193 | .probe = swim3_attach, |
1194 | #if 0 | |
1195 | .suspend = swim3_suspend, | |
1196 | .resume = swim3_resume, | |
1197 | #endif | |
1198 | }; | |
1199 | ||
1200 | ||
1201 | int swim3_init(void) | |
1202 | { | |
1203 | macio_register_driver(&swim3_driver); | |
1da177e4 LT |
1204 | return 0; |
1205 | } | |
1206 | ||
1207 | module_init(swim3_init) | |
1208 | ||
1209 | MODULE_LICENSE("GPL"); | |
1210 | MODULE_AUTHOR("Paul Mackerras"); | |
1211 | MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); |