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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 | ||
8c870933 | 256 | #ifndef CONFIG_PMAC_MEDIABAY |
1da177e4 LT |
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 | { | |
8c870933 | 300 | #ifdef CONFIG_PMAC_MEDIABAY |
1da177e4 LT |
301 | if (floppy_states[i].media_bay && |
302 | check_media_bay(floppy_states[i].media_bay, MB_FD)) | |
303 | continue; | |
8c870933 | 304 | #endif /* CONFIG_PMAC_MEDIABAY */ |
1da177e4 LT |
305 | start_request(&floppy_states[i]); |
306 | } | |
307 | sti(); | |
308 | } | |
309 | ||
310 | static void start_request(struct floppy_state *fs) | |
311 | { | |
312 | struct request *req; | |
313 | unsigned long x; | |
314 | ||
315 | if (fs->state == idle && fs->wanted) { | |
316 | fs->state = available; | |
317 | wake_up(&fs->wait); | |
318 | return; | |
319 | } | |
320 | while (fs->state == idle && (req = elv_next_request(swim3_queue))) { | |
321 | #if 0 | |
322 | printk("do_fd_req: dev=%s cmd=%d sec=%ld nr_sec=%ld buf=%p\n", | |
323 | req->rq_disk->disk_name, req->cmd, | |
324 | (long)req->sector, req->nr_sectors, req->buffer); | |
325 | printk(" rq_status=%d errors=%d current_nr_sectors=%ld\n", | |
326 | req->rq_status, req->errors, req->current_nr_sectors); | |
327 | #endif | |
328 | ||
329 | if (req->sector < 0 || req->sector >= fs->total_secs) { | |
330 | end_request(req, 0); | |
331 | continue; | |
332 | } | |
333 | if (req->current_nr_sectors == 0) { | |
334 | end_request(req, 1); | |
335 | continue; | |
336 | } | |
337 | if (fs->ejected) { | |
338 | end_request(req, 0); | |
339 | continue; | |
340 | } | |
341 | ||
342 | if (rq_data_dir(req) == WRITE) { | |
343 | if (fs->write_prot < 0) | |
344 | fs->write_prot = swim3_readbit(fs, WRITE_PROT); | |
345 | if (fs->write_prot) { | |
346 | end_request(req, 0); | |
347 | continue; | |
348 | } | |
349 | } | |
350 | ||
351 | /* Do not remove the cast. req->sector is now a sector_t and | |
352 | * can be 64 bits, but it will never go past 32 bits for this | |
353 | * driver anyway, so we can safely cast it down and not have | |
354 | * to do a 64/32 division | |
355 | */ | |
356 | fs->req_cyl = ((long)req->sector) / fs->secpercyl; | |
357 | x = ((long)req->sector) % fs->secpercyl; | |
358 | fs->head = x / fs->secpertrack; | |
359 | fs->req_sector = x % fs->secpertrack + 1; | |
360 | fd_req = req; | |
361 | fs->state = do_transfer; | |
362 | fs->retries = 0; | |
363 | ||
364 | act(fs); | |
365 | } | |
366 | } | |
367 | ||
368 | static void set_timeout(struct floppy_state *fs, int nticks, | |
369 | void (*proc)(unsigned long)) | |
370 | { | |
371 | unsigned long flags; | |
372 | ||
373 | save_flags(flags); cli(); | |
374 | if (fs->timeout_pending) | |
375 | del_timer(&fs->timeout); | |
376 | fs->timeout.expires = jiffies + nticks; | |
377 | fs->timeout.function = proc; | |
378 | fs->timeout.data = (unsigned long) fs; | |
379 | add_timer(&fs->timeout); | |
380 | fs->timeout_pending = 1; | |
381 | restore_flags(flags); | |
382 | } | |
383 | ||
384 | static inline void scan_track(struct floppy_state *fs) | |
385 | { | |
386 | struct swim3 __iomem *sw = fs->swim3; | |
387 | ||
388 | swim3_select(fs, READ_DATA_0); | |
389 | in_8(&sw->intr); /* clear SEEN_SECTOR bit */ | |
390 | in_8(&sw->error); | |
391 | out_8(&sw->intr_enable, SEEN_SECTOR); | |
392 | out_8(&sw->control_bis, DO_ACTION); | |
393 | /* enable intr when track found */ | |
394 | set_timeout(fs, HZ, scan_timeout); /* enable timeout */ | |
395 | } | |
396 | ||
397 | static inline void seek_track(struct floppy_state *fs, int n) | |
398 | { | |
399 | struct swim3 __iomem *sw = fs->swim3; | |
400 | ||
401 | if (n >= 0) { | |
402 | swim3_action(fs, SEEK_POSITIVE); | |
403 | sw->nseek = n; | |
404 | } else { | |
405 | swim3_action(fs, SEEK_NEGATIVE); | |
406 | sw->nseek = -n; | |
407 | } | |
408 | fs->expect_cyl = (fs->cur_cyl >= 0)? fs->cur_cyl + n: -1; | |
409 | swim3_select(fs, STEP); | |
410 | in_8(&sw->error); | |
411 | /* enable intr when seek finished */ | |
412 | out_8(&sw->intr_enable, SEEK_DONE); | |
413 | out_8(&sw->control_bis, DO_SEEK); | |
414 | set_timeout(fs, 3*HZ, seek_timeout); /* enable timeout */ | |
415 | fs->settle_time = 0; | |
416 | } | |
417 | ||
418 | static inline void init_dma(struct dbdma_cmd *cp, int cmd, | |
419 | void *buf, int count) | |
420 | { | |
421 | st_le16(&cp->req_count, count); | |
422 | st_le16(&cp->command, cmd); | |
423 | st_le32(&cp->phy_addr, virt_to_bus(buf)); | |
424 | cp->xfer_status = 0; | |
425 | } | |
426 | ||
427 | static inline void setup_transfer(struct floppy_state *fs) | |
428 | { | |
429 | int n; | |
430 | struct swim3 __iomem *sw = fs->swim3; | |
431 | struct dbdma_cmd *cp = fs->dma_cmd; | |
432 | struct dbdma_regs __iomem *dr = fs->dma; | |
433 | ||
434 | if (fd_req->current_nr_sectors <= 0) { | |
435 | printk(KERN_ERR "swim3: transfer 0 sectors?\n"); | |
436 | return; | |
437 | } | |
438 | if (rq_data_dir(fd_req) == WRITE) | |
439 | n = 1; | |
440 | else { | |
441 | n = fs->secpertrack - fs->req_sector + 1; | |
442 | if (n > fd_req->current_nr_sectors) | |
443 | n = fd_req->current_nr_sectors; | |
444 | } | |
445 | fs->scount = n; | |
446 | swim3_select(fs, fs->head? READ_DATA_1: READ_DATA_0); | |
447 | out_8(&sw->sector, fs->req_sector); | |
448 | out_8(&sw->nsect, n); | |
449 | out_8(&sw->gap3, 0); | |
450 | out_le32(&dr->cmdptr, virt_to_bus(cp)); | |
451 | if (rq_data_dir(fd_req) == WRITE) { | |
452 | /* Set up 3 dma commands: write preamble, data, postamble */ | |
453 | init_dma(cp, OUTPUT_MORE, write_preamble, sizeof(write_preamble)); | |
454 | ++cp; | |
455 | init_dma(cp, OUTPUT_MORE, fd_req->buffer, 512); | |
456 | ++cp; | |
457 | init_dma(cp, OUTPUT_LAST, write_postamble, sizeof(write_postamble)); | |
458 | } else { | |
459 | init_dma(cp, INPUT_LAST, fd_req->buffer, n * 512); | |
460 | } | |
461 | ++cp; | |
462 | out_le16(&cp->command, DBDMA_STOP); | |
463 | out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS); | |
464 | in_8(&sw->error); | |
465 | out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS); | |
466 | if (rq_data_dir(fd_req) == WRITE) | |
467 | out_8(&sw->control_bis, WRITE_SECTORS); | |
468 | in_8(&sw->intr); | |
469 | out_le32(&dr->control, (RUN << 16) | RUN); | |
470 | /* enable intr when transfer complete */ | |
471 | out_8(&sw->intr_enable, TRANSFER_DONE); | |
472 | out_8(&sw->control_bis, DO_ACTION); | |
473 | set_timeout(fs, 2*HZ, xfer_timeout); /* enable timeout */ | |
474 | } | |
475 | ||
476 | static void act(struct floppy_state *fs) | |
477 | { | |
478 | for (;;) { | |
479 | switch (fs->state) { | |
480 | case idle: | |
481 | return; /* XXX shouldn't get here */ | |
482 | ||
483 | case locating: | |
484 | if (swim3_readbit(fs, TRACK_ZERO)) { | |
485 | fs->cur_cyl = 0; | |
486 | if (fs->req_cyl == 0) | |
487 | fs->state = do_transfer; | |
488 | else | |
489 | fs->state = seeking; | |
490 | break; | |
491 | } | |
492 | scan_track(fs); | |
493 | return; | |
494 | ||
495 | case seeking: | |
496 | if (fs->cur_cyl < 0) { | |
497 | fs->expect_cyl = -1; | |
498 | fs->state = locating; | |
499 | break; | |
500 | } | |
501 | if (fs->req_cyl == fs->cur_cyl) { | |
502 | printk("whoops, seeking 0\n"); | |
503 | fs->state = do_transfer; | |
504 | break; | |
505 | } | |
506 | seek_track(fs, fs->req_cyl - fs->cur_cyl); | |
507 | return; | |
508 | ||
509 | case settling: | |
510 | /* check for SEEK_COMPLETE after 30ms */ | |
511 | fs->settle_time = (HZ + 32) / 33; | |
512 | set_timeout(fs, fs->settle_time, settle_timeout); | |
513 | return; | |
514 | ||
515 | case do_transfer: | |
516 | if (fs->cur_cyl != fs->req_cyl) { | |
517 | if (fs->retries > 5) { | |
518 | end_request(fd_req, 0); | |
519 | fs->state = idle; | |
520 | return; | |
521 | } | |
522 | fs->state = seeking; | |
523 | break; | |
524 | } | |
525 | setup_transfer(fs); | |
526 | return; | |
527 | ||
528 | case jogging: | |
529 | seek_track(fs, -5); | |
530 | return; | |
531 | ||
532 | default: | |
533 | printk(KERN_ERR"swim3: unknown state %d\n", fs->state); | |
534 | return; | |
535 | } | |
536 | } | |
537 | } | |
538 | ||
539 | static void scan_timeout(unsigned long data) | |
540 | { | |
541 | struct floppy_state *fs = (struct floppy_state *) data; | |
542 | struct swim3 __iomem *sw = fs->swim3; | |
543 | ||
544 | fs->timeout_pending = 0; | |
545 | out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS); | |
546 | out_8(&sw->select, RELAX); | |
547 | out_8(&sw->intr_enable, 0); | |
548 | fs->cur_cyl = -1; | |
549 | if (fs->retries > 5) { | |
550 | end_request(fd_req, 0); | |
551 | fs->state = idle; | |
552 | start_request(fs); | |
553 | } else { | |
554 | fs->state = jogging; | |
555 | act(fs); | |
556 | } | |
557 | } | |
558 | ||
559 | static void seek_timeout(unsigned long data) | |
560 | { | |
561 | struct floppy_state *fs = (struct floppy_state *) data; | |
562 | struct swim3 __iomem *sw = fs->swim3; | |
563 | ||
564 | fs->timeout_pending = 0; | |
565 | out_8(&sw->control_bic, DO_SEEK); | |
566 | out_8(&sw->select, RELAX); | |
567 | out_8(&sw->intr_enable, 0); | |
568 | printk(KERN_ERR "swim3: seek timeout\n"); | |
569 | end_request(fd_req, 0); | |
570 | fs->state = idle; | |
571 | start_request(fs); | |
572 | } | |
573 | ||
574 | static void settle_timeout(unsigned long data) | |
575 | { | |
576 | struct floppy_state *fs = (struct floppy_state *) data; | |
577 | struct swim3 __iomem *sw = fs->swim3; | |
578 | ||
579 | fs->timeout_pending = 0; | |
580 | if (swim3_readbit(fs, SEEK_COMPLETE)) { | |
581 | out_8(&sw->select, RELAX); | |
582 | fs->state = locating; | |
583 | act(fs); | |
584 | return; | |
585 | } | |
586 | out_8(&sw->select, RELAX); | |
587 | if (fs->settle_time < 2*HZ) { | |
588 | ++fs->settle_time; | |
589 | set_timeout(fs, 1, settle_timeout); | |
590 | return; | |
591 | } | |
592 | printk(KERN_ERR "swim3: seek settle timeout\n"); | |
593 | end_request(fd_req, 0); | |
594 | fs->state = idle; | |
595 | start_request(fs); | |
596 | } | |
597 | ||
598 | static void xfer_timeout(unsigned long data) | |
599 | { | |
600 | struct floppy_state *fs = (struct floppy_state *) data; | |
601 | struct swim3 __iomem *sw = fs->swim3; | |
602 | struct dbdma_regs __iomem *dr = fs->dma; | |
603 | struct dbdma_cmd *cp = fs->dma_cmd; | |
604 | unsigned long s; | |
605 | int n; | |
606 | ||
607 | fs->timeout_pending = 0; | |
608 | out_le32(&dr->control, RUN << 16); | |
609 | /* We must wait a bit for dbdma to stop */ | |
610 | for (n = 0; (in_le32(&dr->status) & ACTIVE) && n < 1000; n++) | |
611 | udelay(1); | |
612 | out_8(&sw->intr_enable, 0); | |
613 | out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION); | |
614 | out_8(&sw->select, RELAX); | |
615 | if (rq_data_dir(fd_req) == WRITE) | |
616 | ++cp; | |
617 | if (ld_le16(&cp->xfer_status) != 0) | |
618 | s = fs->scount - ((ld_le16(&cp->res_count) + 511) >> 9); | |
619 | else | |
620 | s = 0; | |
621 | fd_req->sector += s; | |
622 | fd_req->current_nr_sectors -= s; | |
623 | printk(KERN_ERR "swim3: timeout %sing sector %ld\n", | |
624 | (rq_data_dir(fd_req)==WRITE? "writ": "read"), (long)fd_req->sector); | |
625 | end_request(fd_req, 0); | |
626 | fs->state = idle; | |
627 | start_request(fs); | |
628 | } | |
629 | ||
630 | static irqreturn_t swim3_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
631 | { | |
632 | struct floppy_state *fs = (struct floppy_state *) dev_id; | |
633 | struct swim3 __iomem *sw = fs->swim3; | |
634 | int intr, err, n; | |
635 | int stat, resid; | |
636 | struct dbdma_regs __iomem *dr; | |
637 | struct dbdma_cmd *cp; | |
638 | ||
639 | intr = in_8(&sw->intr); | |
640 | err = (intr & ERROR_INTR)? in_8(&sw->error): 0; | |
641 | if ((intr & ERROR_INTR) && fs->state != do_transfer) | |
642 | printk(KERN_ERR "swim3_interrupt, state=%d, dir=%lx, intr=%x, err=%x\n", | |
643 | fs->state, rq_data_dir(fd_req), intr, err); | |
644 | switch (fs->state) { | |
645 | case locating: | |
646 | if (intr & SEEN_SECTOR) { | |
647 | out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS); | |
648 | out_8(&sw->select, RELAX); | |
649 | out_8(&sw->intr_enable, 0); | |
650 | del_timer(&fs->timeout); | |
651 | fs->timeout_pending = 0; | |
652 | if (sw->ctrack == 0xff) { | |
653 | printk(KERN_ERR "swim3: seen sector but cyl=ff?\n"); | |
654 | fs->cur_cyl = -1; | |
655 | if (fs->retries > 5) { | |
656 | end_request(fd_req, 0); | |
657 | fs->state = idle; | |
658 | start_request(fs); | |
659 | } else { | |
660 | fs->state = jogging; | |
661 | act(fs); | |
662 | } | |
663 | break; | |
664 | } | |
665 | fs->cur_cyl = sw->ctrack; | |
666 | fs->cur_sector = sw->csect; | |
667 | if (fs->expect_cyl != -1 && fs->expect_cyl != fs->cur_cyl) | |
668 | printk(KERN_ERR "swim3: expected cyl %d, got %d\n", | |
669 | fs->expect_cyl, fs->cur_cyl); | |
670 | fs->state = do_transfer; | |
671 | act(fs); | |
672 | } | |
673 | break; | |
674 | case seeking: | |
675 | case jogging: | |
676 | if (sw->nseek == 0) { | |
677 | out_8(&sw->control_bic, DO_SEEK); | |
678 | out_8(&sw->select, RELAX); | |
679 | out_8(&sw->intr_enable, 0); | |
680 | del_timer(&fs->timeout); | |
681 | fs->timeout_pending = 0; | |
682 | if (fs->state == seeking) | |
683 | ++fs->retries; | |
684 | fs->state = settling; | |
685 | act(fs); | |
686 | } | |
687 | break; | |
688 | case settling: | |
689 | out_8(&sw->intr_enable, 0); | |
690 | del_timer(&fs->timeout); | |
691 | fs->timeout_pending = 0; | |
692 | act(fs); | |
693 | break; | |
694 | case do_transfer: | |
695 | if ((intr & (ERROR_INTR | TRANSFER_DONE)) == 0) | |
696 | break; | |
697 | out_8(&sw->intr_enable, 0); | |
698 | out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION); | |
699 | out_8(&sw->select, RELAX); | |
700 | del_timer(&fs->timeout); | |
701 | fs->timeout_pending = 0; | |
702 | dr = fs->dma; | |
703 | cp = fs->dma_cmd; | |
704 | if (rq_data_dir(fd_req) == WRITE) | |
705 | ++cp; | |
706 | /* | |
707 | * Check that the main data transfer has finished. | |
708 | * On writing, the swim3 sometimes doesn't use | |
709 | * up all the bytes of the postamble, so we can still | |
710 | * see DMA active here. That doesn't matter as long | |
711 | * as all the sector data has been transferred. | |
712 | */ | |
713 | if ((intr & ERROR_INTR) == 0 && cp->xfer_status == 0) { | |
714 | /* wait a little while for DMA to complete */ | |
715 | for (n = 0; n < 100; ++n) { | |
716 | if (cp->xfer_status != 0) | |
717 | break; | |
718 | udelay(1); | |
719 | barrier(); | |
720 | } | |
721 | } | |
722 | /* turn off DMA */ | |
723 | out_le32(&dr->control, (RUN | PAUSE) << 16); | |
724 | stat = ld_le16(&cp->xfer_status); | |
725 | resid = ld_le16(&cp->res_count); | |
726 | if (intr & ERROR_INTR) { | |
727 | n = fs->scount - 1 - resid / 512; | |
728 | if (n > 0) { | |
729 | fd_req->sector += n; | |
730 | fd_req->current_nr_sectors -= n; | |
731 | fd_req->buffer += n * 512; | |
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", | |
740 | (long)fd_req->sector, err); | |
741 | end_request(fd_req, 0); | |
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); | |
748 | printk(KERN_ERR " state=%d, dir=%lx, intr=%x, err=%x\n", | |
749 | fs->state, rq_data_dir(fd_req), intr, err); | |
750 | end_request(fd_req, 0); | |
751 | fs->state = idle; | |
752 | start_request(fs); | |
753 | break; | |
754 | } | |
755 | fd_req->sector += fs->scount; | |
756 | fd_req->current_nr_sectors -= fs->scount; | |
757 | fd_req->buffer += fs->scount * 512; | |
758 | if (fd_req->current_nr_sectors <= 0) { | |
759 | end_request(fd_req, 1); | |
760 | fs->state = idle; | |
761 | } else { | |
762 | fs->req_sector += fs->scount; | |
763 | if (fs->req_sector > fs->secpertrack) { | |
764 | fs->req_sector -= fs->secpertrack; | |
765 | if (++fs->head > 1) { | |
766 | fs->head = 0; | |
767 | ++fs->req_cyl; | |
768 | } | |
769 | } | |
770 | act(fs); | |
771 | } | |
772 | } | |
773 | if (fs->state == idle) | |
774 | start_request(fs); | |
775 | break; | |
776 | default: | |
777 | printk(KERN_ERR "swim3: don't know what to do in state %d\n", fs->state); | |
778 | } | |
779 | return IRQ_HANDLED; | |
780 | } | |
781 | ||
782 | /* | |
783 | static void fd_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
784 | { | |
785 | } | |
786 | */ | |
787 | ||
788 | static int grab_drive(struct floppy_state *fs, enum swim_state state, | |
789 | int interruptible) | |
790 | { | |
791 | unsigned long flags; | |
792 | ||
793 | save_flags(flags); | |
794 | cli(); | |
795 | if (fs->state != idle) { | |
796 | ++fs->wanted; | |
797 | while (fs->state != available) { | |
798 | if (interruptible && signal_pending(current)) { | |
799 | --fs->wanted; | |
800 | restore_flags(flags); | |
801 | return -EINTR; | |
802 | } | |
803 | interruptible_sleep_on(&fs->wait); | |
804 | } | |
805 | --fs->wanted; | |
806 | } | |
807 | fs->state = state; | |
808 | restore_flags(flags); | |
809 | return 0; | |
810 | } | |
811 | ||
812 | static void release_drive(struct floppy_state *fs) | |
813 | { | |
814 | unsigned long flags; | |
815 | ||
816 | save_flags(flags); | |
817 | cli(); | |
818 | fs->state = idle; | |
819 | start_request(fs); | |
820 | restore_flags(flags); | |
821 | } | |
822 | ||
823 | static int fd_eject(struct floppy_state *fs) | |
824 | { | |
825 | int err, n; | |
826 | ||
827 | err = grab_drive(fs, ejecting, 1); | |
828 | if (err) | |
829 | return err; | |
830 | swim3_action(fs, EJECT); | |
831 | for (n = 20; n > 0; --n) { | |
832 | if (signal_pending(current)) { | |
833 | err = -EINTR; | |
834 | break; | |
835 | } | |
836 | swim3_select(fs, RELAX); | |
837 | current->state = TASK_INTERRUPTIBLE; | |
838 | schedule_timeout(1); | |
839 | if (swim3_readbit(fs, DISK_IN) == 0) | |
840 | break; | |
841 | } | |
842 | swim3_select(fs, RELAX); | |
843 | udelay(150); | |
844 | fs->ejected = 1; | |
845 | release_drive(fs); | |
846 | return err; | |
847 | } | |
848 | ||
849 | static struct floppy_struct floppy_type = | |
850 | { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,NULL }; /* 7 1.44MB 3.5" */ | |
851 | ||
852 | static int floppy_ioctl(struct inode *inode, struct file *filp, | |
853 | unsigned int cmd, unsigned long param) | |
854 | { | |
855 | struct floppy_state *fs = inode->i_bdev->bd_disk->private_data; | |
856 | int err; | |
857 | ||
858 | if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)) | |
859 | return -EPERM; | |
860 | ||
8c870933 | 861 | #ifdef CONFIG_PMAC_MEDIABAY |
1da177e4 LT |
862 | if (fs->media_bay && check_media_bay(fs->media_bay, MB_FD)) |
863 | return -ENXIO; | |
8c870933 | 864 | #endif |
1da177e4 LT |
865 | |
866 | switch (cmd) { | |
867 | case FDEJECT: | |
868 | if (fs->ref_count != 1) | |
869 | return -EBUSY; | |
870 | err = fd_eject(fs); | |
871 | return err; | |
872 | case FDGETPRM: | |
873 | if (copy_to_user((void __user *) param, &floppy_type, | |
874 | sizeof(struct floppy_struct))) | |
875 | return -EFAULT; | |
876 | return 0; | |
877 | } | |
878 | return -ENOTTY; | |
879 | } | |
880 | ||
881 | static int floppy_open(struct inode *inode, struct file *filp) | |
882 | { | |
883 | struct floppy_state *fs = inode->i_bdev->bd_disk->private_data; | |
884 | struct swim3 __iomem *sw = fs->swim3; | |
885 | int n, err = 0; | |
886 | ||
887 | if (fs->ref_count == 0) { | |
8c870933 | 888 | #ifdef CONFIG_PMAC_MEDIABAY |
1da177e4 LT |
889 | if (fs->media_bay && check_media_bay(fs->media_bay, MB_FD)) |
890 | return -ENXIO; | |
8c870933 | 891 | #endif |
1da177e4 LT |
892 | out_8(&sw->setup, S_IBM_DRIVE | S_FCLK_DIV2); |
893 | out_8(&sw->control_bic, 0xff); | |
894 | out_8(&sw->mode, 0x95); | |
895 | udelay(10); | |
896 | out_8(&sw->intr_enable, 0); | |
897 | out_8(&sw->control_bis, DRIVE_ENABLE | INTR_ENABLE); | |
898 | swim3_action(fs, MOTOR_ON); | |
899 | fs->write_prot = -1; | |
900 | fs->cur_cyl = -1; | |
901 | for (n = 0; n < 2 * HZ; ++n) { | |
902 | if (n >= HZ/30 && swim3_readbit(fs, SEEK_COMPLETE)) | |
903 | break; | |
904 | if (signal_pending(current)) { | |
905 | err = -EINTR; | |
906 | break; | |
907 | } | |
908 | swim3_select(fs, RELAX); | |
909 | current->state = TASK_INTERRUPTIBLE; | |
910 | schedule_timeout(1); | |
911 | } | |
912 | if (err == 0 && (swim3_readbit(fs, SEEK_COMPLETE) == 0 | |
913 | || swim3_readbit(fs, DISK_IN) == 0)) | |
914 | err = -ENXIO; | |
915 | swim3_action(fs, SETMFM); | |
916 | swim3_select(fs, RELAX); | |
917 | ||
918 | } else if (fs->ref_count == -1 || filp->f_flags & O_EXCL) | |
919 | return -EBUSY; | |
920 | ||
921 | if (err == 0 && (filp->f_flags & O_NDELAY) == 0 | |
922 | && (filp->f_mode & 3)) { | |
923 | check_disk_change(inode->i_bdev); | |
924 | if (fs->ejected) | |
925 | err = -ENXIO; | |
926 | } | |
927 | ||
928 | if (err == 0 && (filp->f_mode & 2)) { | |
929 | if (fs->write_prot < 0) | |
930 | fs->write_prot = swim3_readbit(fs, WRITE_PROT); | |
931 | if (fs->write_prot) | |
932 | err = -EROFS; | |
933 | } | |
934 | ||
935 | if (err) { | |
936 | if (fs->ref_count == 0) { | |
937 | swim3_action(fs, MOTOR_OFF); | |
938 | out_8(&sw->control_bic, DRIVE_ENABLE | INTR_ENABLE); | |
939 | swim3_select(fs, RELAX); | |
940 | } | |
941 | return err; | |
942 | } | |
943 | ||
944 | if (filp->f_flags & O_EXCL) | |
945 | fs->ref_count = -1; | |
946 | else | |
947 | ++fs->ref_count; | |
948 | ||
949 | return 0; | |
950 | } | |
951 | ||
952 | static int floppy_release(struct inode *inode, struct file *filp) | |
953 | { | |
954 | struct floppy_state *fs = inode->i_bdev->bd_disk->private_data; | |
955 | struct swim3 __iomem *sw = fs->swim3; | |
956 | if (fs->ref_count > 0 && --fs->ref_count == 0) { | |
957 | swim3_action(fs, MOTOR_OFF); | |
958 | out_8(&sw->control_bic, 0xff); | |
959 | swim3_select(fs, RELAX); | |
960 | } | |
961 | return 0; | |
962 | } | |
963 | ||
964 | static int floppy_check_change(struct gendisk *disk) | |
965 | { | |
966 | struct floppy_state *fs = disk->private_data; | |
967 | return fs->ejected; | |
968 | } | |
969 | ||
970 | static int floppy_revalidate(struct gendisk *disk) | |
971 | { | |
972 | struct floppy_state *fs = disk->private_data; | |
973 | struct swim3 __iomem *sw; | |
974 | int ret, n; | |
975 | ||
8c870933 | 976 | #ifdef CONFIG_PMAC_MEDIABAY |
1da177e4 LT |
977 | if (fs->media_bay && check_media_bay(fs->media_bay, MB_FD)) |
978 | return -ENXIO; | |
8c870933 | 979 | #endif |
1da177e4 LT |
980 | |
981 | sw = fs->swim3; | |
982 | grab_drive(fs, revalidating, 0); | |
983 | out_8(&sw->intr_enable, 0); | |
984 | out_8(&sw->control_bis, DRIVE_ENABLE); | |
985 | swim3_action(fs, MOTOR_ON); /* necessary? */ | |
986 | fs->write_prot = -1; | |
987 | fs->cur_cyl = -1; | |
988 | mdelay(1); | |
989 | for (n = HZ; n > 0; --n) { | |
990 | if (swim3_readbit(fs, SEEK_COMPLETE)) | |
991 | break; | |
992 | if (signal_pending(current)) | |
993 | break; | |
994 | swim3_select(fs, RELAX); | |
995 | current->state = TASK_INTERRUPTIBLE; | |
996 | schedule_timeout(1); | |
997 | } | |
998 | ret = swim3_readbit(fs, SEEK_COMPLETE) == 0 | |
999 | || swim3_readbit(fs, DISK_IN) == 0; | |
1000 | if (ret) | |
1001 | swim3_action(fs, MOTOR_OFF); | |
1002 | else { | |
1003 | fs->ejected = 0; | |
1004 | swim3_action(fs, SETMFM); | |
1005 | } | |
1006 | swim3_select(fs, RELAX); | |
1007 | ||
1008 | release_drive(fs); | |
1009 | return ret; | |
1010 | } | |
1011 | ||
1012 | static struct block_device_operations floppy_fops = { | |
1013 | .open = floppy_open, | |
1014 | .release = floppy_release, | |
1015 | .ioctl = floppy_ioctl, | |
1016 | .media_changed = floppy_check_change, | |
1017 | .revalidate_disk= floppy_revalidate, | |
1018 | }; | |
1019 | ||
1020 | int swim3_init(void) | |
1021 | { | |
1022 | struct device_node *swim; | |
1023 | int err = -ENOMEM; | |
1024 | int i; | |
1025 | ||
1026 | devfs_mk_dir("floppy"); | |
1027 | ||
1028 | swim = find_devices("floppy"); | |
1029 | while (swim && (floppy_count < MAX_FLOPPIES)) | |
1030 | { | |
1031 | swim3_add_device(swim); | |
1032 | swim = swim->next; | |
1033 | } | |
1034 | ||
1035 | swim = find_devices("swim3"); | |
1036 | while (swim && (floppy_count < MAX_FLOPPIES)) | |
1037 | { | |
1038 | swim3_add_device(swim); | |
1039 | swim = swim->next; | |
1040 | } | |
1041 | ||
1042 | if (!floppy_count) | |
1043 | return -ENODEV; | |
1044 | ||
1045 | for (i = 0; i < floppy_count; i++) { | |
1046 | disks[i] = alloc_disk(1); | |
1047 | if (!disks[i]) | |
1048 | goto out; | |
1049 | } | |
1050 | ||
1051 | if (register_blkdev(FLOPPY_MAJOR, "fd")) { | |
1052 | err = -EBUSY; | |
1053 | goto out; | |
1054 | } | |
1055 | ||
1056 | swim3_queue = blk_init_queue(do_fd_request, &swim3_lock); | |
1057 | if (!swim3_queue) { | |
1058 | err = -ENOMEM; | |
1059 | goto out_queue; | |
1060 | } | |
1061 | ||
1062 | for (i = 0; i < floppy_count; i++) { | |
1063 | struct gendisk *disk = disks[i]; | |
1064 | disk->major = FLOPPY_MAJOR; | |
1065 | disk->first_minor = i; | |
1066 | disk->fops = &floppy_fops; | |
1067 | disk->private_data = &floppy_states[i]; | |
1068 | disk->queue = swim3_queue; | |
1069 | disk->flags |= GENHD_FL_REMOVABLE; | |
1070 | sprintf(disk->disk_name, "fd%d", i); | |
1071 | sprintf(disk->devfs_name, "floppy/%d", i); | |
1072 | set_capacity(disk, 2880); | |
1073 | add_disk(disk); | |
1074 | } | |
1075 | return 0; | |
1076 | ||
1077 | out_queue: | |
1078 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1079 | out: | |
1080 | while (i--) | |
1081 | put_disk(disks[i]); | |
1082 | /* shouldn't we do something with results of swim_add_device()? */ | |
1083 | return err; | |
1084 | } | |
1085 | ||
1086 | static int swim3_add_device(struct device_node *swim) | |
1087 | { | |
1088 | struct device_node *mediabay; | |
1089 | struct floppy_state *fs = &floppy_states[floppy_count]; | |
1090 | ||
1091 | if (swim->n_addrs < 2) | |
1092 | { | |
1093 | printk(KERN_INFO "swim3: expecting 2 addrs (n_addrs:%d, n_intrs:%d)\n", | |
1094 | swim->n_addrs, swim->n_intrs); | |
1095 | return -EINVAL; | |
1096 | } | |
1097 | ||
1098 | if (swim->n_intrs < 2) | |
1099 | { | |
1100 | printk(KERN_INFO "swim3: expecting 2 intrs (n_addrs:%d, n_intrs:%d)\n", | |
1101 | swim->n_addrs, swim->n_intrs); | |
1102 | return -EINVAL; | |
1103 | } | |
1104 | ||
1105 | if (!request_OF_resource(swim, 0, NULL)) { | |
1106 | printk(KERN_INFO "swim3: can't request IO resource !\n"); | |
1107 | return -EINVAL; | |
1108 | } | |
1109 | ||
1110 | mediabay = (strcasecmp(swim->parent->type, "media-bay") == 0) ? swim->parent : NULL; | |
1111 | if (mediabay == NULL) | |
1112 | pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 1); | |
1113 | ||
1114 | memset(fs, 0, sizeof(*fs)); | |
1115 | fs->state = idle; | |
1116 | fs->swim3 = (struct swim3 __iomem *) | |
1117 | ioremap(swim->addrs[0].address, 0x200); | |
1118 | fs->dma = (struct dbdma_regs __iomem *) | |
1119 | ioremap(swim->addrs[1].address, 0x200); | |
1120 | fs->swim3_intr = swim->intrs[0].line; | |
1121 | fs->dma_intr = swim->intrs[1].line; | |
1122 | fs->cur_cyl = -1; | |
1123 | fs->cur_sector = -1; | |
1124 | fs->secpercyl = 36; | |
1125 | fs->secpertrack = 18; | |
1126 | fs->total_secs = 2880; | |
1127 | fs->media_bay = mediabay; | |
1128 | init_waitqueue_head(&fs->wait); | |
1129 | ||
1130 | fs->dma_cmd = (struct dbdma_cmd *) DBDMA_ALIGN(fs->dbdma_cmd_space); | |
1131 | memset(fs->dma_cmd, 0, 2 * sizeof(struct dbdma_cmd)); | |
1132 | st_le16(&fs->dma_cmd[1].command, DBDMA_STOP); | |
1133 | ||
1134 | if (request_irq(fs->swim3_intr, swim3_interrupt, 0, "SWIM3", fs)) { | |
1135 | printk(KERN_ERR "Couldn't get irq %d for SWIM3\n", fs->swim3_intr); | |
1136 | pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 0); | |
1137 | return -EBUSY; | |
1138 | } | |
1139 | /* | |
1140 | if (request_irq(fs->dma_intr, fd_dma_interrupt, 0, "SWIM3-dma", fs)) { | |
1141 | printk(KERN_ERR "Couldn't get irq %d for SWIM3 DMA", | |
1142 | fs->dma_intr); | |
1143 | pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 0); | |
1144 | return -EBUSY; | |
1145 | } | |
1146 | */ | |
1147 | ||
1148 | init_timer(&fs->timeout); | |
1149 | ||
1150 | printk(KERN_INFO "fd%d: SWIM3 floppy controller %s\n", floppy_count, | |
1151 | mediabay ? "in media bay" : ""); | |
1152 | ||
1153 | floppy_count++; | |
1154 | ||
1155 | return 0; | |
1156 | } | |
1157 | ||
1158 | module_init(swim3_init) | |
1159 | ||
1160 | MODULE_LICENSE("GPL"); | |
1161 | MODULE_AUTHOR("Paul Mackerras"); | |
1162 | MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); |