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