swim3.c (e4da3fbfbd1de56d2367653e3823e6445e49f8a9) swim3.c (b302545744c031eae04a43fb1c56cc17e00a193a)
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
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#undef DEBUG
20
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>

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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
21#include <linux/stddef.h>
22#include <linux/kernel.h>
23#include <linux/sched.h>
24#include <linux/timer.h>
25#include <linux/delay.h>
26#include <linux/fd.h>
27#include <linux/ioctl.h>
28#include <linux/blkdev.h>

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33#include <asm/io.h>
34#include <asm/dbdma.h>
35#include <asm/prom.h>
36#include <asm/uaccess.h>
37#include <asm/mediabay.h>
38#include <asm/machdep.h>
39#include <asm/pmac_feature.h>
40
39static DEFINE_MUTEX(swim3_mutex);
40static struct request_queue *swim3_queue;
41static struct gendisk *disks[2];
42static struct request *fd_req;
43
44#define MAX_FLOPPIES 2
45
41#define MAX_FLOPPIES 2
42
43static DEFINE_MUTEX(swim3_mutex);
44static struct gendisk *disks[MAX_FLOPPIES];
45
46enum swim_state {
47 idle,
48 locating,
49 seeking,
50 settling,
51 do_transfer,
52 jogging,
53 available,

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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
178struct floppy_state {
179 enum swim_state state;
46enum swim_state {
47 idle,
48 locating,
49 seeking,
50 settling,
51 do_transfer,
52 jogging,
53 available,

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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
178struct floppy_state {
179 enum swim_state state;
180 spinlock_t lock;
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 */

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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;
205 struct macio_dev *mdev;
206 char dbdma_cmd_space[5 * sizeof(struct dbdma_cmd)];
180 struct swim3 __iomem *swim3; /* hardware registers */
181 struct dbdma_regs __iomem *dma; /* DMA controller registers */
182 int swim3_intr; /* interrupt number for SWIM3 */
183 int dma_intr; /* interrupt number for DMA channel */
184 int cur_cyl; /* cylinder head is on, or -1 */
185 int cur_sector; /* last sector we saw go past */
186 int req_cyl; /* the cylinder for the current r/w request */
187 int head; /* head number ditto */

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198 int expect_cyl;
199 struct timer_list timeout;
200 int timeout_pending;
201 int ejected;
202 wait_queue_head_t wait;
203 int wanted;
204 struct macio_dev *mdev;
205 char dbdma_cmd_space[5 * sizeof(struct dbdma_cmd)];
206 int index;
207 struct request *cur_req;
207};
208
208};
209
210#define swim3_err(fmt, arg...) dev_err(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
211#define swim3_warn(fmt, arg...) dev_warn(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
212#define swim3_info(fmt, arg...) dev_info(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
213
214#ifdef DEBUG
215#define swim3_dbg(fmt, arg...) dev_dbg(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
216#else
217#define swim3_dbg(fmt, arg...) do { } while(0)
218#endif
219
209static struct floppy_state floppy_states[MAX_FLOPPIES];
210static int floppy_count = 0;
211static DEFINE_SPINLOCK(swim3_lock);
212
213static 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
220static unsigned short write_postamble[] = {
221 0x9904, /* insert CRC */
222 0x4e4e, 0x4e4e,
223 0x9908, /* stop writing */
224 0, 0, 0, 0, 0, 0
225};
226
220static struct floppy_state floppy_states[MAX_FLOPPIES];
221static int floppy_count = 0;
222static DEFINE_SPINLOCK(swim3_lock);
223
224static unsigned short write_preamble[] = {
225 0x4e4e, 0x4e4e, 0x4e4e, 0x4e4e, 0x4e4e, /* gap field */
226 0, 0, 0, 0, 0, 0, /* sync field */
227 0x99a1, 0x99a1, 0x99a1, 0x99fb, /* data address mark */
228 0x990f /* no escape for 512 bytes */
229};
230
231static unsigned short write_postamble[] = {
232 0x9904, /* insert CRC */
233 0x4e4e, 0x4e4e,
234 0x9908, /* stop writing */
235 0, 0, 0, 0, 0, 0
236};
237
227static void swim3_select(struct floppy_state *fs, int sel);
228static void swim3_action(struct floppy_state *fs, int action);
229static int swim3_readbit(struct floppy_state *fs, int bit);
230static void do_fd_request(struct request_queue * q);
231static void start_request(struct floppy_state *fs);
232static void set_timeout(struct floppy_state *fs, int nticks,
233 void (*proc)(unsigned long));
234static void scan_track(struct floppy_state *fs);
235static void seek_track(struct floppy_state *fs, int n);
236static void init_dma(struct dbdma_cmd *cp, int cmd, void *buf, int count);
238static void seek_track(struct floppy_state *fs, int n);
239static void init_dma(struct dbdma_cmd *cp, int cmd, void *buf, int count);
237static void setup_transfer(struct floppy_state *fs);
238static void act(struct floppy_state *fs);
239static void scan_timeout(unsigned long data);
240static void seek_timeout(unsigned long data);
241static void settle_timeout(unsigned long data);
242static void xfer_timeout(unsigned long data);
243static irqreturn_t swim3_interrupt(int irq, void *dev_id);
244/*static void fd_dma_interrupt(int irq, void *dev_id);*/
245static int grab_drive(struct floppy_state *fs, enum swim_state state,
246 int interruptible);
247static void release_drive(struct floppy_state *fs);
248static int fd_eject(struct floppy_state *fs);
249static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
250 unsigned int cmd, unsigned long param);
251static int floppy_open(struct block_device *bdev, fmode_t mode);
252static int floppy_release(struct gendisk *disk, fmode_t mode);
253static unsigned int floppy_check_events(struct gendisk *disk,
254 unsigned int clearing);
255static int floppy_revalidate(struct gendisk *disk);
256
240static void act(struct floppy_state *fs);
241static void scan_timeout(unsigned long data);
242static void seek_timeout(unsigned long data);
243static void settle_timeout(unsigned long data);
244static void xfer_timeout(unsigned long data);
245static irqreturn_t swim3_interrupt(int irq, void *dev_id);
246/*static void fd_dma_interrupt(int irq, void *dev_id);*/
247static int grab_drive(struct floppy_state *fs, enum swim_state state,
248 int interruptible);
249static void release_drive(struct floppy_state *fs);
250static int fd_eject(struct floppy_state *fs);
251static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
252 unsigned int cmd, unsigned long param);
253static int floppy_open(struct block_device *bdev, fmode_t mode);
254static int floppy_release(struct gendisk *disk, fmode_t mode);
255static unsigned int floppy_check_events(struct gendisk *disk,
256 unsigned int clearing);
257static int floppy_revalidate(struct gendisk *disk);
258
257static bool swim3_end_request(int err, unsigned int nr_bytes)
259static bool swim3_end_request(struct floppy_state *fs, int err, unsigned int nr_bytes)
258{
260{
259 if (__blk_end_request(fd_req, err, nr_bytes))
260 return true;
261 struct request *req = fs->cur_req;
262 int rc;
261
263
262 fd_req = NULL;
264 swim3_dbg(" end request, err=%d nr_bytes=%d, cur_req=%p\n",
265 err, nr_bytes, req);
266
267 if (err)
268 nr_bytes = blk_rq_cur_bytes(req);
269 rc = __blk_end_request(req, err, nr_bytes);
270 if (rc)
271 return true;
272 fs->cur_req = NULL;
263 return false;
264}
265
273 return false;
274}
275
266static bool swim3_end_request_cur(int err)
267{
268 return swim3_end_request(err, blk_rq_cur_bytes(fd_req));
269}
270
271static void swim3_select(struct floppy_state *fs, int sel)
272{
273 struct swim3 __iomem *sw = fs->swim3;
274
275 out_8(&sw->select, RELAX);
276 if (sel & 8)
277 out_8(&sw->control_bis, SELECT);
278 else

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298 int stat;
299
300 swim3_select(fs, bit);
301 udelay(1);
302 stat = in_8(&sw->status);
303 return (stat & DATA) == 0;
304}
305
276static void swim3_select(struct floppy_state *fs, int sel)
277{
278 struct swim3 __iomem *sw = fs->swim3;
279
280 out_8(&sw->select, RELAX);
281 if (sel & 8)
282 out_8(&sw->control_bis, SELECT);
283 else

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303 int stat;
304
305 swim3_select(fs, bit);
306 udelay(1);
307 stat = in_8(&sw->status);
308 return (stat & DATA) == 0;
309}
310
306static void do_fd_request(struct request_queue * q)
307{
308 int i;
309
310 for(i=0; i<floppy_count; i++) {
311 struct floppy_state *fs = &floppy_states[i];
312 if (fs->mdev->media_bay &&
313 check_media_bay(fs->mdev->media_bay) != MB_FD)
314 continue;
315 start_request(fs);
316 }
317}
318
319static void start_request(struct floppy_state *fs)
320{
321 struct request *req;
322 unsigned long x;
323
311static void start_request(struct floppy_state *fs)
312{
313 struct request *req;
314 unsigned long x;
315
316 swim3_dbg("start request, initial state=%d\n", fs->state);
317
324 if (fs->state == idle && fs->wanted) {
325 fs->state = available;
326 wake_up(&fs->wait);
327 return;
328 }
329 while (fs->state == idle) {
318 if (fs->state == idle && fs->wanted) {
319 fs->state = available;
320 wake_up(&fs->wait);
321 return;
322 }
323 while (fs->state == idle) {
330 if (!fd_req) {
331 fd_req = blk_fetch_request(swim3_queue);
332 if (!fd_req)
324 swim3_dbg("start request, idle loop, cur_req=%p\n", fs->cur_req);
325 if (!fs->cur_req) {
326 fs->cur_req = blk_fetch_request(disks[fs->index]->queue);
327 swim3_dbg(" fetched request %p\n", fs->cur_req);
328 if (!fs->cur_req)
333 break;
334 }
329 break;
330 }
335 req = fd_req;
336#if 0
337 printk("do_fd_req: dev=%s cmd=%d sec=%ld nr_sec=%u buf=%p\n",
338 req->rq_disk->disk_name, req->cmd,
339 (long)blk_rq_pos(req), blk_rq_sectors(req), req->buffer);
340 printk(" errors=%d current_nr_sectors=%u\n",
341 req->errors, blk_rq_cur_sectors(req));
331 req = fs->cur_req;
332
333 if (fs->mdev->media_bay &&
334 check_media_bay(fs->mdev->media_bay) != MB_FD) {
335 swim3_dbg("%s", " media bay absent, dropping req\n");
336 swim3_end_request(fs, -ENODEV, 0);
337 continue;
338 }
339
340#if 0 /* This is really too verbose */
341 swim3_dbg("do_fd_req: dev=%s cmd=%d sec=%ld nr_sec=%u buf=%p\n",
342 req->rq_disk->disk_name, req->cmd,
343 (long)blk_rq_pos(req), blk_rq_sectors(req),
344 req->buffer);
345 swim3_dbg(" errors=%d current_nr_sectors=%u\n",
346 req->errors, blk_rq_cur_sectors(req));
342#endif
343
344 if (blk_rq_pos(req) >= fs->total_secs) {
347#endif
348
349 if (blk_rq_pos(req) >= fs->total_secs) {
345 swim3_end_request_cur(-EIO);
350 swim3_dbg(" pos out of bounds (%ld, max is %ld)\n",
351 (long)blk_rq_pos(req), (long)fs->total_secs);
352 swim3_end_request(fs, -EIO, 0);
346 continue;
347 }
348 if (fs->ejected) {
353 continue;
354 }
355 if (fs->ejected) {
349 swim3_end_request_cur(-EIO);
356 swim3_dbg("%s", " disk ejected\n");
357 swim3_end_request(fs, -EIO, 0);
350 continue;
351 }
352
353 if (rq_data_dir(req) == WRITE) {
354 if (fs->write_prot < 0)
355 fs->write_prot = swim3_readbit(fs, WRITE_PROT);
356 if (fs->write_prot) {
358 continue;
359 }
360
361 if (rq_data_dir(req) == WRITE) {
362 if (fs->write_prot < 0)
363 fs->write_prot = swim3_readbit(fs, WRITE_PROT);
364 if (fs->write_prot) {
357 swim3_end_request_cur(-EIO);
365 swim3_dbg("%s", " try to write, disk write protected\n");
366 swim3_end_request(fs, -EIO, 0);
358 continue;
359 }
360 }
361
362 /* Do not remove the cast. blk_rq_pos(req) is now a
363 * sector_t and can be 64 bits, but it will never go
364 * past 32 bits for this driver anyway, so we can
365 * safely cast it down and not have to do a 64/32
366 * division
367 */
368 fs->req_cyl = ((long)blk_rq_pos(req)) / fs->secpercyl;
369 x = ((long)blk_rq_pos(req)) % fs->secpercyl;
370 fs->head = x / fs->secpertrack;
371 fs->req_sector = x % fs->secpertrack + 1;
367 continue;
368 }
369 }
370
371 /* Do not remove the cast. blk_rq_pos(req) is now a
372 * sector_t and can be 64 bits, but it will never go
373 * past 32 bits for this driver anyway, so we can
374 * safely cast it down and not have to do a 64/32
375 * division
376 */
377 fs->req_cyl = ((long)blk_rq_pos(req)) / fs->secpercyl;
378 x = ((long)blk_rq_pos(req)) % fs->secpercyl;
379 fs->head = x / fs->secpertrack;
380 fs->req_sector = x % fs->secpertrack + 1;
372 fd_req = req;
373 fs->state = do_transfer;
374 fs->retries = 0;
375
376 act(fs);
377 }
378}
379
381 fs->state = do_transfer;
382 fs->retries = 0;
383
384 act(fs);
385 }
386}
387
388static void do_fd_request(struct request_queue * q)
389{
390 start_request(q->queuedata);
391}
392
380static void set_timeout(struct floppy_state *fs, int nticks,
381 void (*proc)(unsigned long))
382{
393static void set_timeout(struct floppy_state *fs, int nticks,
394 void (*proc)(unsigned long))
395{
383 unsigned long flags;
384
385 spin_lock_irqsave(&fs->lock, flags);
386 if (fs->timeout_pending)
387 del_timer(&fs->timeout);
388 fs->timeout.expires = jiffies + nticks;
389 fs->timeout.function = proc;
390 fs->timeout.data = (unsigned long) fs;
391 add_timer(&fs->timeout);
392 fs->timeout_pending = 1;
396 if (fs->timeout_pending)
397 del_timer(&fs->timeout);
398 fs->timeout.expires = jiffies + nticks;
399 fs->timeout.function = proc;
400 fs->timeout.data = (unsigned long) fs;
401 add_timer(&fs->timeout);
402 fs->timeout_pending = 1;
393 spin_unlock_irqrestore(&fs->lock, flags);
394}
395
396static inline void scan_track(struct floppy_state *fs)
397{
398 struct swim3 __iomem *sw = fs->swim3;
399
400 swim3_select(fs, READ_DATA_0);
401 in_8(&sw->intr); /* clear SEEN_SECTOR bit */

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437}
438
439static inline void setup_transfer(struct floppy_state *fs)
440{
441 int n;
442 struct swim3 __iomem *sw = fs->swim3;
443 struct dbdma_cmd *cp = fs->dma_cmd;
444 struct dbdma_regs __iomem *dr = fs->dma;
403}
404
405static inline void scan_track(struct floppy_state *fs)
406{
407 struct swim3 __iomem *sw = fs->swim3;
408
409 swim3_select(fs, READ_DATA_0);
410 in_8(&sw->intr); /* clear SEEN_SECTOR bit */

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446}
447
448static inline void setup_transfer(struct floppy_state *fs)
449{
450 int n;
451 struct swim3 __iomem *sw = fs->swim3;
452 struct dbdma_cmd *cp = fs->dma_cmd;
453 struct dbdma_regs __iomem *dr = fs->dma;
454 struct request *req = fs->cur_req;
445
455
446 if (blk_rq_cur_sectors(fd_req) <= 0) {
447 printk(KERN_ERR "swim3: transfer 0 sectors?\n");
456 if (blk_rq_cur_sectors(req) <= 0) {
457 swim3_warn("%s", "Transfer 0 sectors ?\n");
448 return;
449 }
458 return;
459 }
450 if (rq_data_dir(fd_req) == WRITE)
460 if (rq_data_dir(req) == WRITE)
451 n = 1;
452 else {
453 n = fs->secpertrack - fs->req_sector + 1;
461 n = 1;
462 else {
463 n = fs->secpertrack - fs->req_sector + 1;
454 if (n > blk_rq_cur_sectors(fd_req))
455 n = blk_rq_cur_sectors(fd_req);
464 if (n > blk_rq_cur_sectors(req))
465 n = blk_rq_cur_sectors(req);
456 }
466 }
467
468 swim3_dbg(" setup xfer at sect %d (of %d) head %d for %d\n",
469 fs->req_sector, fs->secpertrack, fs->head, n);
470
457 fs->scount = n;
458 swim3_select(fs, fs->head? READ_DATA_1: READ_DATA_0);
459 out_8(&sw->sector, fs->req_sector);
460 out_8(&sw->nsect, n);
461 out_8(&sw->gap3, 0);
462 out_le32(&dr->cmdptr, virt_to_bus(cp));
471 fs->scount = n;
472 swim3_select(fs, fs->head? READ_DATA_1: READ_DATA_0);
473 out_8(&sw->sector, fs->req_sector);
474 out_8(&sw->nsect, n);
475 out_8(&sw->gap3, 0);
476 out_le32(&dr->cmdptr, virt_to_bus(cp));
463 if (rq_data_dir(fd_req) == WRITE) {
477 if (rq_data_dir(req) == WRITE) {
464 /* Set up 3 dma commands: write preamble, data, postamble */
465 init_dma(cp, OUTPUT_MORE, write_preamble, sizeof(write_preamble));
466 ++cp;
478 /* Set up 3 dma commands: write preamble, data, postamble */
479 init_dma(cp, OUTPUT_MORE, write_preamble, sizeof(write_preamble));
480 ++cp;
467 init_dma(cp, OUTPUT_MORE, fd_req->buffer, 512);
481 init_dma(cp, OUTPUT_MORE, req->buffer, 512);
468 ++cp;
469 init_dma(cp, OUTPUT_LAST, write_postamble, sizeof(write_postamble));
470 } else {
482 ++cp;
483 init_dma(cp, OUTPUT_LAST, write_postamble, sizeof(write_postamble));
484 } else {
471 init_dma(cp, INPUT_LAST, fd_req->buffer, n * 512);
485 init_dma(cp, INPUT_LAST, req->buffer, n * 512);
472 }
473 ++cp;
474 out_le16(&cp->command, DBDMA_STOP);
475 out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
476 in_8(&sw->error);
477 out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
486 }
487 ++cp;
488 out_le16(&cp->command, DBDMA_STOP);
489 out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
490 in_8(&sw->error);
491 out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
478 if (rq_data_dir(fd_req) == WRITE)
492 if (rq_data_dir(req) == WRITE)
479 out_8(&sw->control_bis, WRITE_SECTORS);
480 in_8(&sw->intr);
481 out_le32(&dr->control, (RUN << 16) | RUN);
482 /* enable intr when transfer complete */
483 out_8(&sw->intr_enable, TRANSFER_DONE);
484 out_8(&sw->control_bis, DO_ACTION);
485 set_timeout(fs, 2*HZ, xfer_timeout); /* enable timeout */
486}
487
488static void act(struct floppy_state *fs)
489{
490 for (;;) {
493 out_8(&sw->control_bis, WRITE_SECTORS);
494 in_8(&sw->intr);
495 out_le32(&dr->control, (RUN << 16) | RUN);
496 /* enable intr when transfer complete */
497 out_8(&sw->intr_enable, TRANSFER_DONE);
498 out_8(&sw->control_bis, DO_ACTION);
499 set_timeout(fs, 2*HZ, xfer_timeout); /* enable timeout */
500}
501
502static void act(struct floppy_state *fs)
503{
504 for (;;) {
505 swim3_dbg(" act loop, state=%d, req_cyl=%d, cur_cyl=%d\n",
506 fs->state, fs->req_cyl, fs->cur_cyl);
507
491 switch (fs->state) {
492 case idle:
493 return; /* XXX shouldn't get here */
494
495 case locating:
496 if (swim3_readbit(fs, TRACK_ZERO)) {
508 switch (fs->state) {
509 case idle:
510 return; /* XXX shouldn't get here */
511
512 case locating:
513 if (swim3_readbit(fs, TRACK_ZERO)) {
514 swim3_dbg("%s", " locate track 0\n");
497 fs->cur_cyl = 0;
498 if (fs->req_cyl == 0)
499 fs->state = do_transfer;
500 else
501 fs->state = seeking;
502 break;
503 }
504 scan_track(fs);
505 return;
506
507 case seeking:
508 if (fs->cur_cyl < 0) {
509 fs->expect_cyl = -1;
510 fs->state = locating;
511 break;
512 }
513 if (fs->req_cyl == fs->cur_cyl) {
515 fs->cur_cyl = 0;
516 if (fs->req_cyl == 0)
517 fs->state = do_transfer;
518 else
519 fs->state = seeking;
520 break;
521 }
522 scan_track(fs);
523 return;
524
525 case seeking:
526 if (fs->cur_cyl < 0) {
527 fs->expect_cyl = -1;
528 fs->state = locating;
529 break;
530 }
531 if (fs->req_cyl == fs->cur_cyl) {
514 printk("whoops, seeking 0\n");
532 swim3_warn("%s", "Whoops, seeking 0\n");
515 fs->state = do_transfer;
516 break;
517 }
518 seek_track(fs, fs->req_cyl - fs->cur_cyl);
519 return;
520
521 case settling:
522 /* check for SEEK_COMPLETE after 30ms */
523 fs->settle_time = (HZ + 32) / 33;
524 set_timeout(fs, fs->settle_time, settle_timeout);
525 return;
526
527 case do_transfer:
528 if (fs->cur_cyl != fs->req_cyl) {
529 if (fs->retries > 5) {
533 fs->state = do_transfer;
534 break;
535 }
536 seek_track(fs, fs->req_cyl - fs->cur_cyl);
537 return;
538
539 case settling:
540 /* check for SEEK_COMPLETE after 30ms */
541 fs->settle_time = (HZ + 32) / 33;
542 set_timeout(fs, fs->settle_time, settle_timeout);
543 return;
544
545 case do_transfer:
546 if (fs->cur_cyl != fs->req_cyl) {
547 if (fs->retries > 5) {
530 swim3_end_request_cur(-EIO);
548 swim3_err("Wrong cylinder in transfer, want: %d got %d\n",
549 fs->req_cyl, fs->cur_cyl);
550 swim3_end_request(fs, -EIO, 0);
531 fs->state = idle;
532 return;
533 }
534 fs->state = seeking;
535 break;
536 }
537 setup_transfer(fs);
538 return;
539
540 case jogging:
541 seek_track(fs, -5);
542 return;
543
544 default:
551 fs->state = idle;
552 return;
553 }
554 fs->state = seeking;
555 break;
556 }
557 setup_transfer(fs);
558 return;
559
560 case jogging:
561 seek_track(fs, -5);
562 return;
563
564 default:
545 printk(KERN_ERR"swim3: unknown state %d\n", fs->state);
565 swim3_err("Unknown state %d\n", fs->state);
546 return;
547 }
548 }
549}
550
551static void scan_timeout(unsigned long data)
552{
553 struct floppy_state *fs = (struct floppy_state *) data;
554 struct swim3 __iomem *sw = fs->swim3;
566 return;
567 }
568 }
569}
570
571static void scan_timeout(unsigned long data)
572{
573 struct floppy_state *fs = (struct floppy_state *) data;
574 struct swim3 __iomem *sw = fs->swim3;
575 unsigned long flags;
555
576
577 swim3_dbg("* scan timeout, state=%d\n", fs->state);
578
579 spin_lock_irqsave(&swim3_lock, flags);
556 fs->timeout_pending = 0;
557 out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
558 out_8(&sw->select, RELAX);
559 out_8(&sw->intr_enable, 0);
560 fs->cur_cyl = -1;
561 if (fs->retries > 5) {
580 fs->timeout_pending = 0;
581 out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
582 out_8(&sw->select, RELAX);
583 out_8(&sw->intr_enable, 0);
584 fs->cur_cyl = -1;
585 if (fs->retries > 5) {
562 swim3_end_request_cur(-EIO);
586 swim3_end_request(fs, -EIO, 0);
563 fs->state = idle;
564 start_request(fs);
565 } else {
566 fs->state = jogging;
567 act(fs);
568 }
587 fs->state = idle;
588 start_request(fs);
589 } else {
590 fs->state = jogging;
591 act(fs);
592 }
593 spin_unlock_irqrestore(&swim3_lock, flags);
569}
570
571static void seek_timeout(unsigned long data)
572{
573 struct floppy_state *fs = (struct floppy_state *) data;
574 struct swim3 __iomem *sw = fs->swim3;
594}
595
596static void seek_timeout(unsigned long data)
597{
598 struct floppy_state *fs = (struct floppy_state *) data;
599 struct swim3 __iomem *sw = fs->swim3;
600 unsigned long flags;
575
601
602 swim3_dbg("* seek timeout, state=%d\n", fs->state);
603
604 spin_lock_irqsave(&swim3_lock, flags);
576 fs->timeout_pending = 0;
577 out_8(&sw->control_bic, DO_SEEK);
578 out_8(&sw->select, RELAX);
579 out_8(&sw->intr_enable, 0);
605 fs->timeout_pending = 0;
606 out_8(&sw->control_bic, DO_SEEK);
607 out_8(&sw->select, RELAX);
608 out_8(&sw->intr_enable, 0);
580 printk(KERN_ERR "swim3: seek timeout\n");
581 swim3_end_request_cur(-EIO);
609 swim3_err("%s", "Seek timeout\n");
610 swim3_end_request(fs, -EIO, 0);
582 fs->state = idle;
583 start_request(fs);
611 fs->state = idle;
612 start_request(fs);
613 spin_unlock_irqrestore(&swim3_lock, flags);
584}
585
586static void settle_timeout(unsigned long data)
587{
588 struct floppy_state *fs = (struct floppy_state *) data;
589 struct swim3 __iomem *sw = fs->swim3;
614}
615
616static void settle_timeout(unsigned long data)
617{
618 struct floppy_state *fs = (struct floppy_state *) data;
619 struct swim3 __iomem *sw = fs->swim3;
620 unsigned long flags;
590
621
622 swim3_dbg("* settle timeout, state=%d\n", fs->state);
623
624 spin_lock_irqsave(&swim3_lock, flags);
591 fs->timeout_pending = 0;
592 if (swim3_readbit(fs, SEEK_COMPLETE)) {
593 out_8(&sw->select, RELAX);
594 fs->state = locating;
595 act(fs);
625 fs->timeout_pending = 0;
626 if (swim3_readbit(fs, SEEK_COMPLETE)) {
627 out_8(&sw->select, RELAX);
628 fs->state = locating;
629 act(fs);
596 return;
630 goto unlock;
597 }
598 out_8(&sw->select, RELAX);
599 if (fs->settle_time < 2*HZ) {
600 ++fs->settle_time;
601 set_timeout(fs, 1, settle_timeout);
631 }
632 out_8(&sw->select, RELAX);
633 if (fs->settle_time < 2*HZ) {
634 ++fs->settle_time;
635 set_timeout(fs, 1, settle_timeout);
602 return;
636 goto unlock;
603 }
637 }
604 printk(KERN_ERR "swim3: seek settle timeout\n");
605 swim3_end_request_cur(-EIO);
638 swim3_err("%s", "Seek settle timeout\n");
639 swim3_end_request(fs, -EIO, 0);
606 fs->state = idle;
607 start_request(fs);
640 fs->state = idle;
641 start_request(fs);
642 unlock:
643 spin_unlock_irqrestore(&swim3_lock, flags);
608}
609
610static void xfer_timeout(unsigned long data)
611{
612 struct floppy_state *fs = (struct floppy_state *) data;
613 struct swim3 __iomem *sw = fs->swim3;
614 struct dbdma_regs __iomem *dr = fs->dma;
644}
645
646static void xfer_timeout(unsigned long data)
647{
648 struct floppy_state *fs = (struct floppy_state *) data;
649 struct swim3 __iomem *sw = fs->swim3;
650 struct dbdma_regs __iomem *dr = fs->dma;
651 unsigned long flags;
615 int n;
616
652 int n;
653
654 swim3_dbg("* xfer timeout, state=%d\n", fs->state);
655
656 spin_lock_irqsave(&swim3_lock, flags);
617 fs->timeout_pending = 0;
618 out_le32(&dr->control, RUN << 16);
619 /* We must wait a bit for dbdma to stop */
620 for (n = 0; (in_le32(&dr->status) & ACTIVE) && n < 1000; n++)
621 udelay(1);
622 out_8(&sw->intr_enable, 0);
623 out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION);
624 out_8(&sw->select, RELAX);
657 fs->timeout_pending = 0;
658 out_le32(&dr->control, RUN << 16);
659 /* We must wait a bit for dbdma to stop */
660 for (n = 0; (in_le32(&dr->status) & ACTIVE) && n < 1000; n++)
661 udelay(1);
662 out_8(&sw->intr_enable, 0);
663 out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION);
664 out_8(&sw->select, RELAX);
625 printk(KERN_ERR "swim3: timeout %sing sector %ld\n",
626 (rq_data_dir(fd_req)==WRITE? "writ": "read"),
627 (long)blk_rq_pos(fd_req));
628 swim3_end_request_cur(-EIO);
665 swim3_err("Timeout %sing sector %ld\n",
666 (rq_data_dir(fs->cur_req)==WRITE? "writ": "read"),
667 (long)blk_rq_pos(fs->cur_req));
668 swim3_end_request(fs, -EIO, 0);
629 fs->state = idle;
630 start_request(fs);
669 fs->state = idle;
670 start_request(fs);
671 spin_unlock_irqrestore(&swim3_lock, flags);
631}
632
633static irqreturn_t swim3_interrupt(int irq, void *dev_id)
634{
635 struct floppy_state *fs = (struct floppy_state *) dev_id;
636 struct swim3 __iomem *sw = fs->swim3;
637 int intr, err, n;
638 int stat, resid;
639 struct dbdma_regs __iomem *dr;
640 struct dbdma_cmd *cp;
672}
673
674static irqreturn_t swim3_interrupt(int irq, void *dev_id)
675{
676 struct floppy_state *fs = (struct floppy_state *) dev_id;
677 struct swim3 __iomem *sw = fs->swim3;
678 int intr, err, n;
679 int stat, resid;
680 struct dbdma_regs __iomem *dr;
681 struct dbdma_cmd *cp;
682 unsigned long flags;
683 struct request *req = fs->cur_req;
641
684
685 swim3_dbg("* interrupt, state=%d\n", fs->state);
686
687 spin_lock_irqsave(&swim3_lock, flags);
642 intr = in_8(&sw->intr);
643 err = (intr & ERROR_INTR)? in_8(&sw->error): 0;
644 if ((intr & ERROR_INTR) && fs->state != do_transfer)
688 intr = in_8(&sw->intr);
689 err = (intr & ERROR_INTR)? in_8(&sw->error): 0;
690 if ((intr & ERROR_INTR) && fs->state != do_transfer)
645 printk(KERN_ERR "swim3_interrupt, state=%d, dir=%x, intr=%x, err=%x\n",
646 fs->state, rq_data_dir(fd_req), intr, err);
691 swim3_err("Non-transfer error interrupt: state=%d, dir=%x, intr=%x, err=%x\n",
692 fs->state, rq_data_dir(req), intr, err);
647 switch (fs->state) {
648 case locating:
649 if (intr & SEEN_SECTOR) {
650 out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
651 out_8(&sw->select, RELAX);
652 out_8(&sw->intr_enable, 0);
653 del_timer(&fs->timeout);
654 fs->timeout_pending = 0;
655 if (sw->ctrack == 0xff) {
693 switch (fs->state) {
694 case locating:
695 if (intr & SEEN_SECTOR) {
696 out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
697 out_8(&sw->select, RELAX);
698 out_8(&sw->intr_enable, 0);
699 del_timer(&fs->timeout);
700 fs->timeout_pending = 0;
701 if (sw->ctrack == 0xff) {
656 printk(KERN_ERR "swim3: seen sector but cyl=ff?\n");
702 swim3_err("%s", "Seen sector but cyl=ff?\n");
657 fs->cur_cyl = -1;
658 if (fs->retries > 5) {
703 fs->cur_cyl = -1;
704 if (fs->retries > 5) {
659 swim3_end_request_cur(-EIO);
705 swim3_end_request(fs, -EIO, 0);
660 fs->state = idle;
661 start_request(fs);
662 } else {
663 fs->state = jogging;
664 act(fs);
665 }
666 break;
667 }
668 fs->cur_cyl = sw->ctrack;
669 fs->cur_sector = sw->csect;
670 if (fs->expect_cyl != -1 && fs->expect_cyl != fs->cur_cyl)
706 fs->state = idle;
707 start_request(fs);
708 } else {
709 fs->state = jogging;
710 act(fs);
711 }
712 break;
713 }
714 fs->cur_cyl = sw->ctrack;
715 fs->cur_sector = sw->csect;
716 if (fs->expect_cyl != -1 && fs->expect_cyl != fs->cur_cyl)
671 printk(KERN_ERR "swim3: expected cyl %d, got %d\n",
672 fs->expect_cyl, fs->cur_cyl);
717 swim3_err("Expected cyl %d, got %d\n",
718 fs->expect_cyl, fs->cur_cyl);
673 fs->state = do_transfer;
674 act(fs);
675 }
676 break;
677 case seeking:
678 case jogging:
679 if (sw->nseek == 0) {
680 out_8(&sw->control_bic, DO_SEEK);

--- 18 unchanged lines hidden (view full) ---

699 break;
700 out_8(&sw->intr_enable, 0);
701 out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION);
702 out_8(&sw->select, RELAX);
703 del_timer(&fs->timeout);
704 fs->timeout_pending = 0;
705 dr = fs->dma;
706 cp = fs->dma_cmd;
719 fs->state = do_transfer;
720 act(fs);
721 }
722 break;
723 case seeking:
724 case jogging:
725 if (sw->nseek == 0) {
726 out_8(&sw->control_bic, DO_SEEK);

--- 18 unchanged lines hidden (view full) ---

745 break;
746 out_8(&sw->intr_enable, 0);
747 out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION);
748 out_8(&sw->select, RELAX);
749 del_timer(&fs->timeout);
750 fs->timeout_pending = 0;
751 dr = fs->dma;
752 cp = fs->dma_cmd;
707 if (rq_data_dir(fd_req) == WRITE)
753 if (rq_data_dir(req) == WRITE)
708 ++cp;
709 /*
710 * Check that the main data transfer has finished.
711 * On writing, the swim3 sometimes doesn't use
712 * up all the bytes of the postamble, so we can still
713 * see DMA active here. That doesn't matter as long
714 * as all the sector data has been transferred.
715 */

--- 8 unchanged lines hidden (view full) ---

724 }
725 /* turn off DMA */
726 out_le32(&dr->control, (RUN | PAUSE) << 16);
727 stat = ld_le16(&cp->xfer_status);
728 resid = ld_le16(&cp->res_count);
729 if (intr & ERROR_INTR) {
730 n = fs->scount - 1 - resid / 512;
731 if (n > 0) {
754 ++cp;
755 /*
756 * Check that the main data transfer has finished.
757 * On writing, the swim3 sometimes doesn't use
758 * up all the bytes of the postamble, so we can still
759 * see DMA active here. That doesn't matter as long
760 * as all the sector data has been transferred.
761 */

--- 8 unchanged lines hidden (view full) ---

770 }
771 /* turn off DMA */
772 out_le32(&dr->control, (RUN | PAUSE) << 16);
773 stat = ld_le16(&cp->xfer_status);
774 resid = ld_le16(&cp->res_count);
775 if (intr & ERROR_INTR) {
776 n = fs->scount - 1 - resid / 512;
777 if (n > 0) {
732 blk_update_request(fd_req, 0, n << 9);
778 blk_update_request(req, 0, n << 9);
733 fs->req_sector += n;
734 }
735 if (fs->retries < 5) {
736 ++fs->retries;
737 act(fs);
738 } else {
779 fs->req_sector += n;
780 }
781 if (fs->retries < 5) {
782 ++fs->retries;
783 act(fs);
784 } else {
739 printk("swim3: error %sing block %ld (err=%x)\n",
740 rq_data_dir(fd_req) == WRITE? "writ": "read",
741 (long)blk_rq_pos(fd_req), err);
742 swim3_end_request_cur(-EIO);
785 swim3_err("Error %sing block %ld (err=%x)\n",
786 rq_data_dir(req) == WRITE? "writ": "read",
787 (long)blk_rq_pos(req), err);
788 swim3_end_request(fs, -EIO, 0);
743 fs->state = idle;
744 }
745 } else {
746 if ((stat & ACTIVE) == 0 || resid != 0) {
747 /* musta been an error */
789 fs->state = idle;
790 }
791 } else {
792 if ((stat & ACTIVE) == 0 || resid != 0) {
793 /* musta been an error */
748 printk(KERN_ERR "swim3: fd dma: stat=%x resid=%d\n", stat, resid);
749 printk(KERN_ERR " state=%d, dir=%x, intr=%x, err=%x\n",
750 fs->state, rq_data_dir(fd_req), intr, err);
751 swim3_end_request_cur(-EIO);
794 swim3_err("fd dma error: stat=%x resid=%d\n", stat, resid);
795 swim3_err(" state=%d, dir=%x, intr=%x, err=%x\n",
796 fs->state, rq_data_dir(req), intr, err);
797 swim3_end_request(fs, -EIO, 0);
752 fs->state = idle;
753 start_request(fs);
754 break;
755 }
798 fs->state = idle;
799 start_request(fs);
800 break;
801 }
756 if (swim3_end_request(0, fs->scount << 9)) {
802 fs->retries = 0;
803 if (swim3_end_request(fs, 0, fs->scount << 9)) {
757 fs->req_sector += fs->scount;
758 if (fs->req_sector > fs->secpertrack) {
759 fs->req_sector -= fs->secpertrack;
760 if (++fs->head > 1) {
761 fs->head = 0;
762 ++fs->req_cyl;
763 }
764 }
765 act(fs);
766 } else
767 fs->state = idle;
768 }
769 if (fs->state == idle)
770 start_request(fs);
771 break;
772 default:
804 fs->req_sector += fs->scount;
805 if (fs->req_sector > fs->secpertrack) {
806 fs->req_sector -= fs->secpertrack;
807 if (++fs->head > 1) {
808 fs->head = 0;
809 ++fs->req_cyl;
810 }
811 }
812 act(fs);
813 } else
814 fs->state = idle;
815 }
816 if (fs->state == idle)
817 start_request(fs);
818 break;
819 default:
773 printk(KERN_ERR "swim3: don't know what to do in state %d\n", fs->state);
820 swim3_err("Don't know what to do in state %d\n", fs->state);
774 }
821 }
822 spin_unlock_irqrestore(&swim3_lock, flags);
775 return IRQ_HANDLED;
776}
777
778/*
779static void fd_dma_interrupt(int irq, void *dev_id)
780{
781}
782*/
783
823 return IRQ_HANDLED;
824}
825
826/*
827static void fd_dma_interrupt(int irq, void *dev_id)
828{
829}
830*/
831
832/* Called under the mutex to grab exclusive access to a drive */
784static int grab_drive(struct floppy_state *fs, enum swim_state state,
785 int interruptible)
786{
787 unsigned long flags;
788
833static int grab_drive(struct floppy_state *fs, enum swim_state state,
834 int interruptible)
835{
836 unsigned long flags;
837
789 spin_lock_irqsave(&fs->lock, flags);
790 if (fs->state != idle) {
838 swim3_dbg("%s", "-> grab drive\n");
839
840 spin_lock_irqsave(&swim3_lock, flags);
841 if (fs->state != idle && fs->state != available) {
791 ++fs->wanted;
792 while (fs->state != available) {
842 ++fs->wanted;
843 while (fs->state != available) {
844 spin_unlock_irqrestore(&swim3_lock, flags);
793 if (interruptible && signal_pending(current)) {
794 --fs->wanted;
845 if (interruptible && signal_pending(current)) {
846 --fs->wanted;
795 spin_unlock_irqrestore(&fs->lock, flags);
796 return -EINTR;
797 }
798 interruptible_sleep_on(&fs->wait);
847 return -EINTR;
848 }
849 interruptible_sleep_on(&fs->wait);
850 spin_lock_irqsave(&swim3_lock, flags);
799 }
800 --fs->wanted;
801 }
802 fs->state = state;
851 }
852 --fs->wanted;
853 }
854 fs->state = state;
803 spin_unlock_irqrestore(&fs->lock, flags);
855 spin_unlock_irqrestore(&swim3_lock, flags);
856
804 return 0;
805}
806
807static void release_drive(struct floppy_state *fs)
808{
809 unsigned long flags;
810
857 return 0;
858}
859
860static void release_drive(struct floppy_state *fs)
861{
862 unsigned long flags;
863
811 spin_lock_irqsave(&fs->lock, flags);
864 swim3_dbg("%s", "-> release drive\n");
865
866 spin_lock_irqsave(&swim3_lock, flags);
812 fs->state = idle;
813 start_request(fs);
867 fs->state = idle;
868 start_request(fs);
814 spin_unlock_irqrestore(&fs->lock, flags);
869 spin_unlock_irqrestore(&swim3_lock, flags);
815}
816
817static int fd_eject(struct floppy_state *fs)
818{
819 int err, n;
820
821 err = grab_drive(fs, ejecting, 1);
822 if (err)

--- 138 unchanged lines hidden (view full) ---

961
962 return ret;
963}
964
965static int floppy_release(struct gendisk *disk, fmode_t mode)
966{
967 struct floppy_state *fs = disk->private_data;
968 struct swim3 __iomem *sw = fs->swim3;
870}
871
872static int fd_eject(struct floppy_state *fs)
873{
874 int err, n;
875
876 err = grab_drive(fs, ejecting, 1);
877 if (err)

--- 138 unchanged lines hidden (view full) ---

1016
1017 return ret;
1018}
1019
1020static int floppy_release(struct gendisk *disk, fmode_t mode)
1021{
1022 struct floppy_state *fs = disk->private_data;
1023 struct swim3 __iomem *sw = fs->swim3;
1024
969 mutex_lock(&swim3_mutex);
970 if (fs->ref_count > 0 && --fs->ref_count == 0) {
971 swim3_action(fs, MOTOR_OFF);
972 out_8(&sw->control_bic, 0xff);
973 swim3_select(fs, RELAX);
974 }
975 mutex_unlock(&swim3_mutex);
976 return 0;

--- 49 unchanged lines hidden (view full) ---

1026static const struct block_device_operations floppy_fops = {
1027 .open = floppy_unlocked_open,
1028 .release = floppy_release,
1029 .ioctl = floppy_ioctl,
1030 .check_events = floppy_check_events,
1031 .revalidate_disk= floppy_revalidate,
1032};
1033
1025 mutex_lock(&swim3_mutex);
1026 if (fs->ref_count > 0 && --fs->ref_count == 0) {
1027 swim3_action(fs, MOTOR_OFF);
1028 out_8(&sw->control_bic, 0xff);
1029 swim3_select(fs, RELAX);
1030 }
1031 mutex_unlock(&swim3_mutex);
1032 return 0;

--- 49 unchanged lines hidden (view full) ---

1082static const struct block_device_operations floppy_fops = {
1083 .open = floppy_unlocked_open,
1084 .release = floppy_release,
1085 .ioctl = floppy_ioctl,
1086 .check_events = floppy_check_events,
1087 .revalidate_disk= floppy_revalidate,
1088};
1089
1090static void swim3_mb_event(struct macio_dev* mdev, int mb_state)
1091{
1092 struct floppy_state *fs = macio_get_drvdata(mdev);
1093 struct swim3 __iomem *sw = fs->swim3;
1094
1095 if (!fs)
1096 return;
1097 if (mb_state != MB_FD)
1098 return;
1099
1100 /* Clear state */
1101 out_8(&sw->intr_enable, 0);
1102 in_8(&sw->intr);
1103 in_8(&sw->error);
1104}
1105
1034static int swim3_add_device(struct macio_dev *mdev, int index)
1035{
1036 struct device_node *swim = mdev->ofdev.dev.of_node;
1037 struct floppy_state *fs = &floppy_states[index];
1038 int rc = -EBUSY;
1039
1106static int swim3_add_device(struct macio_dev *mdev, int index)
1107{
1108 struct device_node *swim = mdev->ofdev.dev.of_node;
1109 struct floppy_state *fs = &floppy_states[index];
1110 int rc = -EBUSY;
1111
1112 /* Do this first for message macros */
1113 memset(fs, 0, sizeof(*fs));
1114 fs->mdev = mdev;
1115 fs->index = index;
1116
1040 /* Check & Request resources */
1041 if (macio_resource_count(mdev) < 2) {
1117 /* Check & Request resources */
1118 if (macio_resource_count(mdev) < 2) {
1042 printk(KERN_WARNING "ifd%d: no address for %s\n",
1043 index, swim->full_name);
1119 swim3_err("%s", "No address in device-tree\n");
1044 return -ENXIO;
1045 }
1120 return -ENXIO;
1121 }
1046 if (macio_irq_count(mdev) < 2) {
1047 printk(KERN_WARNING "fd%d: no intrs for device %s\n",
1048 index, swim->full_name);
1122 if (macio_irq_count(mdev) < 1) {
1123 swim3_err("%s", "No interrupt in device-tree\n");
1124 return -ENXIO;
1049 }
1050 if (macio_request_resource(mdev, 0, "swim3 (mmio)")) {
1125 }
1126 if (macio_request_resource(mdev, 0, "swim3 (mmio)")) {
1051 printk(KERN_ERR "fd%d: can't request mmio resource for %s\n",
1052 index, swim->full_name);
1127 swim3_err("%s", "Can't request mmio resource\n");
1053 return -EBUSY;
1054 }
1055 if (macio_request_resource(mdev, 1, "swim3 (dma)")) {
1128 return -EBUSY;
1129 }
1130 if (macio_request_resource(mdev, 1, "swim3 (dma)")) {
1056 printk(KERN_ERR "fd%d: can't request dma resource for %s\n",
1057 index, swim->full_name);
1131 swim3_err("%s", "Can't request dma resource\n");
1058 macio_release_resource(mdev, 0);
1059 return -EBUSY;
1060 }
1061 dev_set_drvdata(&mdev->ofdev.dev, fs);
1062
1063 if (mdev->media_bay == NULL)
1064 pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 1);
1065
1132 macio_release_resource(mdev, 0);
1133 return -EBUSY;
1134 }
1135 dev_set_drvdata(&mdev->ofdev.dev, fs);
1136
1137 if (mdev->media_bay == NULL)
1138 pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 1);
1139
1066 memset(fs, 0, sizeof(*fs));
1067 spin_lock_init(&fs->lock);
1068 fs->state = idle;
1069 fs->swim3 = (struct swim3 __iomem *)
1070 ioremap(macio_resource_start(mdev, 0), 0x200);
1071 if (fs->swim3 == NULL) {
1140 fs->state = idle;
1141 fs->swim3 = (struct swim3 __iomem *)
1142 ioremap(macio_resource_start(mdev, 0), 0x200);
1143 if (fs->swim3 == NULL) {
1072 printk("fd%d: couldn't map registers for %s\n",
1073 index, swim->full_name);
1144 swim3_err("%s", "Couldn't map mmio registers\n");
1074 rc = -ENOMEM;
1075 goto out_release;
1076 }
1077 fs->dma = (struct dbdma_regs __iomem *)
1078 ioremap(macio_resource_start(mdev, 1), 0x200);
1079 if (fs->dma == NULL) {
1145 rc = -ENOMEM;
1146 goto out_release;
1147 }
1148 fs->dma = (struct dbdma_regs __iomem *)
1149 ioremap(macio_resource_start(mdev, 1), 0x200);
1150 if (fs->dma == NULL) {
1080 printk("fd%d: couldn't map DMA for %s\n",
1081 index, swim->full_name);
1151 swim3_err("%s", "Couldn't map dma registers\n");
1082 iounmap(fs->swim3);
1083 rc = -ENOMEM;
1084 goto out_release;
1085 }
1086 fs->swim3_intr = macio_irq(mdev, 0);
1087 fs->dma_intr = macio_irq(mdev, 1);
1088 fs->cur_cyl = -1;
1089 fs->cur_sector = -1;
1090 fs->secpercyl = 36;
1091 fs->secpertrack = 18;
1092 fs->total_secs = 2880;
1152 iounmap(fs->swim3);
1153 rc = -ENOMEM;
1154 goto out_release;
1155 }
1156 fs->swim3_intr = macio_irq(mdev, 0);
1157 fs->dma_intr = macio_irq(mdev, 1);
1158 fs->cur_cyl = -1;
1159 fs->cur_sector = -1;
1160 fs->secpercyl = 36;
1161 fs->secpertrack = 18;
1162 fs->total_secs = 2880;
1093 fs->mdev = mdev;
1094 init_waitqueue_head(&fs->wait);
1095
1096 fs->dma_cmd = (struct dbdma_cmd *) DBDMA_ALIGN(fs->dbdma_cmd_space);
1097 memset(fs->dma_cmd, 0, 2 * sizeof(struct dbdma_cmd));
1098 st_le16(&fs->dma_cmd[1].command, DBDMA_STOP);
1099
1163 init_waitqueue_head(&fs->wait);
1164
1165 fs->dma_cmd = (struct dbdma_cmd *) DBDMA_ALIGN(fs->dbdma_cmd_space);
1166 memset(fs->dma_cmd, 0, 2 * sizeof(struct dbdma_cmd));
1167 st_le16(&fs->dma_cmd[1].command, DBDMA_STOP);
1168
1169 if (mdev->media_bay == NULL || check_media_bay(mdev->media_bay) == MB_FD)
1170 swim3_mb_event(mdev, MB_FD);
1171
1100 if (request_irq(fs->swim3_intr, swim3_interrupt, 0, "SWIM3", fs)) {
1172 if (request_irq(fs->swim3_intr, swim3_interrupt, 0, "SWIM3", fs)) {
1101 printk(KERN_ERR "fd%d: couldn't request irq %d for %s\n",
1102 index, fs->swim3_intr, swim->full_name);
1173 swim3_err("%s", "Couldn't request interrupt\n");
1103 pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 0);
1104 goto out_unmap;
1105 return -EBUSY;
1106 }
1174 pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 0);
1175 goto out_unmap;
1176 return -EBUSY;
1177 }
1107/*
1108 if (request_irq(fs->dma_intr, fd_dma_interrupt, 0, "SWIM3-dma", fs)) {
1109 printk(KERN_ERR "Couldn't get irq %d for SWIM3 DMA",
1110 fs->dma_intr);
1111 return -EBUSY;
1112 }
1113*/
1114
1115 init_timer(&fs->timeout);
1116
1178
1179 init_timer(&fs->timeout);
1180
1117 printk(KERN_INFO "fd%d: SWIM3 floppy controller %s\n", floppy_count,
1181 swim3_info("SWIM3 floppy controller %s\n",
1118 mdev->media_bay ? "in media bay" : "");
1119
1120 return 0;
1121
1122 out_unmap:
1123 iounmap(fs->dma);
1124 iounmap(fs->swim3);
1125
1126 out_release:
1127 macio_release_resource(mdev, 0);
1128 macio_release_resource(mdev, 1);
1129
1130 return rc;
1131}
1132
1133static int __devinit swim3_attach(struct macio_dev *mdev, const struct of_device_id *match)
1134{
1182 mdev->media_bay ? "in media bay" : "");
1183
1184 return 0;
1185
1186 out_unmap:
1187 iounmap(fs->dma);
1188 iounmap(fs->swim3);
1189
1190 out_release:
1191 macio_release_resource(mdev, 0);
1192 macio_release_resource(mdev, 1);
1193
1194 return rc;
1195}
1196
1197static int __devinit swim3_attach(struct macio_dev *mdev, const struct of_device_id *match)
1198{
1135 int i, rc;
1136 struct gendisk *disk;
1199 struct gendisk *disk;
1200 int index, rc;
1137
1201
1202 index = floppy_count++;
1203 if (index >= MAX_FLOPPIES)
1204 return -ENXIO;
1205
1138 /* Add the drive */
1206 /* Add the drive */
1139 rc = swim3_add_device(mdev, floppy_count);
1207 rc = swim3_add_device(mdev, index);
1140 if (rc)
1141 return rc;
1208 if (rc)
1209 return rc;
1210 /* Now register that disk. Same comment about failure handling */
1211 disk = disks[index] = alloc_disk(1);
1212 if (disk == NULL)
1213 return -ENOMEM;
1214 disk->queue = blk_init_queue(do_fd_request, &swim3_lock);
1215 if (disk->queue == NULL) {
1216 put_disk(disk);
1217 return -ENOMEM;
1218 }
1219 disk->queue->queuedata = &floppy_states[index];
1142
1220
1143 /* Now create the queue if not there yet */
1144 if (swim3_queue == NULL) {
1221 if (index == 0) {
1145 /* If we failed, there isn't much we can do as the driver is still
1146 * too dumb to remove the device, just bail out
1147 */
1148 if (register_blkdev(FLOPPY_MAJOR, "fd"))
1149 return 0;
1222 /* If we failed, there isn't much we can do as the driver is still
1223 * too dumb to remove the device, just bail out
1224 */
1225 if (register_blkdev(FLOPPY_MAJOR, "fd"))
1226 return 0;
1150 swim3_queue = blk_init_queue(do_fd_request, &swim3_lock);
1151 if (swim3_queue == NULL) {
1152 unregister_blkdev(FLOPPY_MAJOR, "fd");
1153 return 0;
1154 }
1155 }
1156
1227 }
1228
1157 /* Now register that disk. Same comment about failure handling */
1158 i = floppy_count++;
1159 disk = disks[i] = alloc_disk(1);
1160 if (disk == NULL)
1161 return 0;
1162
1163 disk->major = FLOPPY_MAJOR;
1229 disk->major = FLOPPY_MAJOR;
1164 disk->first_minor = i;
1230 disk->first_minor = index;
1165 disk->fops = &floppy_fops;
1231 disk->fops = &floppy_fops;
1166 disk->private_data = &floppy_states[i];
1167 disk->queue = swim3_queue;
1232 disk->private_data = &floppy_states[index];
1168 disk->flags |= GENHD_FL_REMOVABLE;
1233 disk->flags |= GENHD_FL_REMOVABLE;
1169 sprintf(disk->disk_name, "fd%d", i);
1234 sprintf(disk->disk_name, "fd%d", index);
1170 set_capacity(disk, 2880);
1171 add_disk(disk);
1172
1173 return 0;
1174}
1175
1176static struct of_device_id swim3_match[] =
1177{

--- 11 unchanged lines hidden (view full) ---

1189
1190static struct macio_driver swim3_driver =
1191{
1192 .driver = {
1193 .name = "swim3",
1194 .of_match_table = swim3_match,
1195 },
1196 .probe = swim3_attach,
1235 set_capacity(disk, 2880);
1236 add_disk(disk);
1237
1238 return 0;
1239}
1240
1241static struct of_device_id swim3_match[] =
1242{

--- 11 unchanged lines hidden (view full) ---

1254
1255static struct macio_driver swim3_driver =
1256{
1257 .driver = {
1258 .name = "swim3",
1259 .of_match_table = swim3_match,
1260 },
1261 .probe = swim3_attach,
1262#ifdef CONFIG_PMAC_MEDIABAY
1263 .mediabay_event = swim3_mb_event,
1264#endif
1197#if 0
1198 .suspend = swim3_suspend,
1199 .resume = swim3_resume,
1200#endif
1201};
1202
1203
1204int swim3_init(void)
1205{
1206 macio_register_driver(&swim3_driver);
1207 return 0;
1208}
1209
1210module_init(swim3_init)
1211
1212MODULE_LICENSE("GPL");
1213MODULE_AUTHOR("Paul Mackerras");
1214MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);
1265#if 0
1266 .suspend = swim3_suspend,
1267 .resume = swim3_resume,
1268#endif
1269};
1270
1271
1272int swim3_init(void)
1273{
1274 macio_register_driver(&swim3_driver);
1275 return 0;
1276}
1277
1278module_init(swim3_init)
1279
1280MODULE_LICENSE("GPL");
1281MODULE_AUTHOR("Paul Mackerras");
1282MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);