2 * Driver for the SWIM3 (Super Woz Integrated Machine 3)
3 * floppy controller found on Power Macintoshes.
5 * Copyright (C) 1996 Paul Mackerras.
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.
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>
25 #include <linux/ioctl.h>
26 #include <linux/blkdev.h>
27 #include <linux/interrupt.h>
28 #include <linux/module.h>
29 #include <linux/spinlock.h>
31 #include <asm/dbdma.h>
33 #include <asm/uaccess.h>
34 #include <asm/mediabay.h>
35 #include <asm/machdep.h>
36 #include <asm/pmac_feature.h>
38 static struct request_queue
*swim3_queue
;
39 static struct gendisk
*disks
[2];
40 static struct request
*fd_req
;
42 #define MAX_FLOPPIES 2
56 #define REG(x) unsigned char x; char x ## _pad[15];
59 * The names for these registers mostly represent speculation on my part.
60 * It will be interesting to see how close they are to the names Apple uses.
64 REG(timer
); /* counts down at 1MHz */
67 REG(select
); /* controls CA0, CA1, CA2 and LSTRB signals */
69 REG(control
); /* writing bits clears them */
70 REG(status
); /* writing bits sets them in control */
72 REG(nseek
); /* # tracks to seek */
73 REG(ctrack
); /* current track number */
74 REG(csect
); /* current sector number */
75 REG(gap3
); /* size of gap 3 in track format */
76 REG(sector
); /* sector # to read or write */
77 REG(nsect
); /* # sectors to read or write */
81 #define control_bic control
82 #define control_bis status
84 /* Bits in select register */
88 /* Bits in control register */
92 #define WRITE_SECTORS 0x10
93 #define DO_ACTION 0x08
94 #define DRIVE2_ENABLE 0x04
95 #define DRIVE_ENABLE 0x02
96 #define INTR_ENABLE 0x01
98 /* Bits in status register */
99 #define FIFO_1BYTE 0x80
100 #define FIFO_2BYTE 0x40
104 #define INTR_PENDING 0x02
105 #define MARK_BYTE 0x01
107 /* Bits in intr and intr_enable registers */
108 #define ERROR_INTR 0x20
109 #define DATA_CHANGED 0x10
110 #define TRANSFER_DONE 0x08
111 #define SEEN_SECTOR 0x04
112 #define SEEK_DONE 0x02
113 #define TIMER_DONE 0x01
115 /* Bits in error register */
116 #define ERR_DATA_CRC 0x80
117 #define ERR_ADDR_CRC 0x40
118 #define ERR_OVERRUN 0x04
119 #define ERR_UNDERRUN 0x01
121 /* Bits in setup register */
122 #define S_SW_RESET 0x80
123 #define S_GCR_WRITE 0x40
124 #define S_IBM_DRIVE 0x20
125 #define S_TEST_MODE 0x10
126 #define S_FCLK_DIV2 0x08
128 #define S_COPY_PROT 0x02
129 #define S_INV_WDATA 0x01
131 /* Select values for swim3_action */
132 #define SEEK_POSITIVE 0
133 #define SEEK_NEGATIVE 4
142 /* Select values for swim3_select and swim3_readbit */
146 #define RELAX 3 /* also eject in progress */
147 #define READ_DATA_0 4
148 #define TWOMEG_DRIVE 5
149 #define SINGLE_SIDED 6 /* drive or diskette is 4MB type? */
150 #define DRIVE_PRESENT 7
153 #define TRACK_ZERO 10
155 #define READ_DATA_1 12
157 #define SEEK_COMPLETE 14
158 #define ONEMEG_MEDIA 15
160 /* Definitions of values used in writing and formatting */
161 #define DATA_ESCAPE 0x99
162 #define GCR_SYNC_EXC 0x3f
163 #define GCR_SYNC_CONV 0x80
164 #define GCR_FIRST_MARK 0xd5
165 #define GCR_SECOND_MARK 0xaa
166 #define GCR_ADDR_MARK "\xd5\xaa\x00"
167 #define GCR_DATA_MARK "\xd5\xaa\x0b"
168 #define GCR_SLIP_BYTE "\x27\xaa"
169 #define GCR_SELF_SYNC "\x3f\xbf\x1e\x34\x3c\x3f"
171 #define DATA_99 "\x99\x99"
172 #define MFM_ADDR_MARK "\x99\xa1\x99\xa1\x99\xa1\x99\xfe"
173 #define MFM_INDEX_MARK "\x99\xc2\x99\xc2\x99\xc2\x99\xfc"
174 #define MFM_GAP_LEN 12
176 struct floppy_state
{
177 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 */
191 int secpercyl
; /* disk geometry information */
194 int write_prot
; /* 1 if write-protected, 0 if not, -1 dunno */
195 struct dbdma_cmd
*dma_cmd
;
198 struct timer_list timeout
;
201 wait_queue_head_t wait
;
203 struct device_node
* media_bay
; /* NULL when not in bay */
204 char dbdma_cmd_space
[5 * sizeof(struct dbdma_cmd
)];
207 static struct floppy_state floppy_states
[MAX_FLOPPIES
];
208 static int floppy_count
= 0;
209 static DEFINE_SPINLOCK(swim3_lock
);
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 */
218 static unsigned short write_postamble
[] = {
219 0x9904, /* insert CRC */
221 0x9908, /* stop writing */
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
,
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);
256 #ifndef CONFIG_PMAC_MEDIABAY
257 #define check_media_bay(which, what) 1
260 static void swim3_select(struct floppy_state
*fs
, int sel
)
262 struct swim3 __iomem
*sw
= fs
->swim3
;
264 out_8(&sw
->select
, RELAX
);
266 out_8(&sw
->control_bis
, SELECT
);
268 out_8(&sw
->control_bic
, SELECT
);
269 out_8(&sw
->select
, sel
& CA_MASK
);
272 static void swim3_action(struct floppy_state
*fs
, int action
)
274 struct swim3 __iomem
*sw
= fs
->swim3
;
276 swim3_select(fs
, action
);
278 out_8(&sw
->select
, sw
->select
| LSTRB
);
280 out_8(&sw
->select
, sw
->select
& ~LSTRB
);
284 static int swim3_readbit(struct floppy_state
*fs
, int bit
)
286 struct swim3 __iomem
*sw
= fs
->swim3
;
289 swim3_select(fs
, bit
);
291 stat
= in_8(&sw
->status
);
292 return (stat
& DATA
) == 0;
295 static void do_fd_request(request_queue_t
* q
)
298 for(i
=0;i
<floppy_count
;i
++)
300 #ifdef CONFIG_PMAC_MEDIABAY
301 if (floppy_states
[i
].media_bay
&&
302 check_media_bay(floppy_states
[i
].media_bay
, MB_FD
))
304 #endif /* CONFIG_PMAC_MEDIABAY */
305 start_request(&floppy_states
[i
]);
309 static void start_request(struct floppy_state
*fs
)
314 if (fs
->state
== idle
&& fs
->wanted
) {
315 fs
->state
= available
;
319 while (fs
->state
== idle
&& (req
= elv_next_request(swim3_queue
))) {
321 printk("do_fd_req: dev=%s cmd=%d sec=%ld nr_sec=%ld buf=%p\n",
322 req
->rq_disk
->disk_name
, req
->cmd
,
323 (long)req
->sector
, req
->nr_sectors
, req
->buffer
);
324 printk(" rq_status=%d errors=%d current_nr_sectors=%ld\n",
325 req
->rq_status
, req
->errors
, req
->current_nr_sectors
);
328 if (req
->sector
< 0 || req
->sector
>= fs
->total_secs
) {
332 if (req
->current_nr_sectors
== 0) {
341 if (rq_data_dir(req
) == WRITE
) {
342 if (fs
->write_prot
< 0)
343 fs
->write_prot
= swim3_readbit(fs
, WRITE_PROT
);
344 if (fs
->write_prot
) {
350 /* Do not remove the cast. req->sector is now a sector_t and
351 * can be 64 bits, but it will never go past 32 bits for this
352 * driver anyway, so we can safely cast it down and not have
353 * to do a 64/32 division
355 fs
->req_cyl
= ((long)req
->sector
) / fs
->secpercyl
;
356 x
= ((long)req
->sector
) % fs
->secpercyl
;
357 fs
->head
= x
/ fs
->secpertrack
;
358 fs
->req_sector
= x
% fs
->secpertrack
+ 1;
360 fs
->state
= do_transfer
;
367 static void set_timeout(struct floppy_state
*fs
, int nticks
,
368 void (*proc
)(unsigned long))
372 spin_lock_irqsave(&fs
->lock
, flags
);
373 if (fs
->timeout_pending
)
374 del_timer(&fs
->timeout
);
375 fs
->timeout
.expires
= jiffies
+ nticks
;
376 fs
->timeout
.function
= proc
;
377 fs
->timeout
.data
= (unsigned long) fs
;
378 add_timer(&fs
->timeout
);
379 fs
->timeout_pending
= 1;
380 spin_unlock_irqrestore(&fs
->lock
, flags
);
383 static inline void scan_track(struct floppy_state
*fs
)
385 struct swim3 __iomem
*sw
= fs
->swim3
;
387 swim3_select(fs
, READ_DATA_0
);
388 in_8(&sw
->intr
); /* clear SEEN_SECTOR bit */
390 out_8(&sw
->intr_enable
, SEEN_SECTOR
);
391 out_8(&sw
->control_bis
, DO_ACTION
);
392 /* enable intr when track found */
393 set_timeout(fs
, HZ
, scan_timeout
); /* enable timeout */
396 static inline void seek_track(struct floppy_state
*fs
, int n
)
398 struct swim3 __iomem
*sw
= fs
->swim3
;
401 swim3_action(fs
, SEEK_POSITIVE
);
404 swim3_action(fs
, SEEK_NEGATIVE
);
407 fs
->expect_cyl
= (fs
->cur_cyl
>= 0)? fs
->cur_cyl
+ n
: -1;
408 swim3_select(fs
, STEP
);
410 /* enable intr when seek finished */
411 out_8(&sw
->intr_enable
, SEEK_DONE
);
412 out_8(&sw
->control_bis
, DO_SEEK
);
413 set_timeout(fs
, 3*HZ
, seek_timeout
); /* enable timeout */
417 static inline void init_dma(struct dbdma_cmd
*cp
, int cmd
,
418 void *buf
, int count
)
420 st_le16(&cp
->req_count
, count
);
421 st_le16(&cp
->command
, cmd
);
422 st_le32(&cp
->phy_addr
, virt_to_bus(buf
));
426 static inline void setup_transfer(struct floppy_state
*fs
)
429 struct swim3 __iomem
*sw
= fs
->swim3
;
430 struct dbdma_cmd
*cp
= fs
->dma_cmd
;
431 struct dbdma_regs __iomem
*dr
= fs
->dma
;
433 if (fd_req
->current_nr_sectors
<= 0) {
434 printk(KERN_ERR
"swim3: transfer 0 sectors?\n");
437 if (rq_data_dir(fd_req
) == WRITE
)
440 n
= fs
->secpertrack
- fs
->req_sector
+ 1;
441 if (n
> fd_req
->current_nr_sectors
)
442 n
= fd_req
->current_nr_sectors
;
445 swim3_select(fs
, fs
->head
? READ_DATA_1
: READ_DATA_0
);
446 out_8(&sw
->sector
, fs
->req_sector
);
447 out_8(&sw
->nsect
, n
);
449 out_le32(&dr
->cmdptr
, virt_to_bus(cp
));
450 if (rq_data_dir(fd_req
) == WRITE
) {
451 /* Set up 3 dma commands: write preamble, data, postamble */
452 init_dma(cp
, OUTPUT_MORE
, write_preamble
, sizeof(write_preamble
));
454 init_dma(cp
, OUTPUT_MORE
, fd_req
->buffer
, 512);
456 init_dma(cp
, OUTPUT_LAST
, write_postamble
, sizeof(write_postamble
));
458 init_dma(cp
, INPUT_LAST
, fd_req
->buffer
, n
* 512);
461 out_le16(&cp
->command
, DBDMA_STOP
);
462 out_8(&sw
->control_bic
, DO_ACTION
| WRITE_SECTORS
);
464 out_8(&sw
->control_bic
, DO_ACTION
| WRITE_SECTORS
);
465 if (rq_data_dir(fd_req
) == WRITE
)
466 out_8(&sw
->control_bis
, WRITE_SECTORS
);
468 out_le32(&dr
->control
, (RUN
<< 16) | RUN
);
469 /* enable intr when transfer complete */
470 out_8(&sw
->intr_enable
, TRANSFER_DONE
);
471 out_8(&sw
->control_bis
, DO_ACTION
);
472 set_timeout(fs
, 2*HZ
, xfer_timeout
); /* enable timeout */
475 static void act(struct floppy_state
*fs
)
480 return; /* XXX shouldn't get here */
483 if (swim3_readbit(fs
, TRACK_ZERO
)) {
485 if (fs
->req_cyl
== 0)
486 fs
->state
= do_transfer
;
495 if (fs
->cur_cyl
< 0) {
497 fs
->state
= locating
;
500 if (fs
->req_cyl
== fs
->cur_cyl
) {
501 printk("whoops, seeking 0\n");
502 fs
->state
= do_transfer
;
505 seek_track(fs
, fs
->req_cyl
- fs
->cur_cyl
);
509 /* check for SEEK_COMPLETE after 30ms */
510 fs
->settle_time
= (HZ
+ 32) / 33;
511 set_timeout(fs
, fs
->settle_time
, settle_timeout
);
515 if (fs
->cur_cyl
!= fs
->req_cyl
) {
516 if (fs
->retries
> 5) {
517 end_request(fd_req
, 0);
532 printk(KERN_ERR
"swim3: unknown state %d\n", fs
->state
);
538 static void scan_timeout(unsigned long data
)
540 struct floppy_state
*fs
= (struct floppy_state
*) data
;
541 struct swim3 __iomem
*sw
= fs
->swim3
;
543 fs
->timeout_pending
= 0;
544 out_8(&sw
->control_bic
, DO_ACTION
| WRITE_SECTORS
);
545 out_8(&sw
->select
, RELAX
);
546 out_8(&sw
->intr_enable
, 0);
548 if (fs
->retries
> 5) {
549 end_request(fd_req
, 0);
558 static void seek_timeout(unsigned long data
)
560 struct floppy_state
*fs
= (struct floppy_state
*) data
;
561 struct swim3 __iomem
*sw
= fs
->swim3
;
563 fs
->timeout_pending
= 0;
564 out_8(&sw
->control_bic
, DO_SEEK
);
565 out_8(&sw
->select
, RELAX
);
566 out_8(&sw
->intr_enable
, 0);
567 printk(KERN_ERR
"swim3: seek timeout\n");
568 end_request(fd_req
, 0);
573 static void settle_timeout(unsigned long data
)
575 struct floppy_state
*fs
= (struct floppy_state
*) data
;
576 struct swim3 __iomem
*sw
= fs
->swim3
;
578 fs
->timeout_pending
= 0;
579 if (swim3_readbit(fs
, SEEK_COMPLETE
)) {
580 out_8(&sw
->select
, RELAX
);
581 fs
->state
= locating
;
585 out_8(&sw
->select
, RELAX
);
586 if (fs
->settle_time
< 2*HZ
) {
588 set_timeout(fs
, 1, settle_timeout
);
591 printk(KERN_ERR
"swim3: seek settle timeout\n");
592 end_request(fd_req
, 0);
597 static void xfer_timeout(unsigned long data
)
599 struct floppy_state
*fs
= (struct floppy_state
*) data
;
600 struct swim3 __iomem
*sw
= fs
->swim3
;
601 struct dbdma_regs __iomem
*dr
= fs
->dma
;
602 struct dbdma_cmd
*cp
= fs
->dma_cmd
;
606 fs
->timeout_pending
= 0;
607 out_le32(&dr
->control
, RUN
<< 16);
608 /* We must wait a bit for dbdma to stop */
609 for (n
= 0; (in_le32(&dr
->status
) & ACTIVE
) && n
< 1000; n
++)
611 out_8(&sw
->intr_enable
, 0);
612 out_8(&sw
->control_bic
, WRITE_SECTORS
| DO_ACTION
);
613 out_8(&sw
->select
, RELAX
);
614 if (rq_data_dir(fd_req
) == WRITE
)
616 if (ld_le16(&cp
->xfer_status
) != 0)
617 s
= fs
->scount
- ((ld_le16(&cp
->res_count
) + 511) >> 9);
621 fd_req
->current_nr_sectors
-= s
;
622 printk(KERN_ERR
"swim3: timeout %sing sector %ld\n",
623 (rq_data_dir(fd_req
)==WRITE
? "writ": "read"), (long)fd_req
->sector
);
624 end_request(fd_req
, 0);
629 static irqreturn_t
swim3_interrupt(int irq
, void *dev_id
, struct pt_regs
*regs
)
631 struct floppy_state
*fs
= (struct floppy_state
*) dev_id
;
632 struct swim3 __iomem
*sw
= fs
->swim3
;
635 struct dbdma_regs __iomem
*dr
;
636 struct dbdma_cmd
*cp
;
638 intr
= in_8(&sw
->intr
);
639 err
= (intr
& ERROR_INTR
)? in_8(&sw
->error
): 0;
640 if ((intr
& ERROR_INTR
) && fs
->state
!= do_transfer
)
641 printk(KERN_ERR
"swim3_interrupt, state=%d, dir=%lx, intr=%x, err=%x\n",
642 fs
->state
, rq_data_dir(fd_req
), intr
, err
);
645 if (intr
& SEEN_SECTOR
) {
646 out_8(&sw
->control_bic
, DO_ACTION
| WRITE_SECTORS
);
647 out_8(&sw
->select
, RELAX
);
648 out_8(&sw
->intr_enable
, 0);
649 del_timer(&fs
->timeout
);
650 fs
->timeout_pending
= 0;
651 if (sw
->ctrack
== 0xff) {
652 printk(KERN_ERR
"swim3: seen sector but cyl=ff?\n");
654 if (fs
->retries
> 5) {
655 end_request(fd_req
, 0);
664 fs
->cur_cyl
= sw
->ctrack
;
665 fs
->cur_sector
= sw
->csect
;
666 if (fs
->expect_cyl
!= -1 && fs
->expect_cyl
!= fs
->cur_cyl
)
667 printk(KERN_ERR
"swim3: expected cyl %d, got %d\n",
668 fs
->expect_cyl
, fs
->cur_cyl
);
669 fs
->state
= do_transfer
;
675 if (sw
->nseek
== 0) {
676 out_8(&sw
->control_bic
, DO_SEEK
);
677 out_8(&sw
->select
, RELAX
);
678 out_8(&sw
->intr_enable
, 0);
679 del_timer(&fs
->timeout
);
680 fs
->timeout_pending
= 0;
681 if (fs
->state
== seeking
)
683 fs
->state
= settling
;
688 out_8(&sw
->intr_enable
, 0);
689 del_timer(&fs
->timeout
);
690 fs
->timeout_pending
= 0;
694 if ((intr
& (ERROR_INTR
| TRANSFER_DONE
)) == 0)
696 out_8(&sw
->intr_enable
, 0);
697 out_8(&sw
->control_bic
, WRITE_SECTORS
| DO_ACTION
);
698 out_8(&sw
->select
, RELAX
);
699 del_timer(&fs
->timeout
);
700 fs
->timeout_pending
= 0;
703 if (rq_data_dir(fd_req
) == WRITE
)
706 * Check that the main data transfer has finished.
707 * On writing, the swim3 sometimes doesn't use
708 * up all the bytes of the postamble, so we can still
709 * see DMA active here. That doesn't matter as long
710 * as all the sector data has been transferred.
712 if ((intr
& ERROR_INTR
) == 0 && cp
->xfer_status
== 0) {
713 /* wait a little while for DMA to complete */
714 for (n
= 0; n
< 100; ++n
) {
715 if (cp
->xfer_status
!= 0)
722 out_le32(&dr
->control
, (RUN
| PAUSE
) << 16);
723 stat
= ld_le16(&cp
->xfer_status
);
724 resid
= ld_le16(&cp
->res_count
);
725 if (intr
& ERROR_INTR
) {
726 n
= fs
->scount
- 1 - resid
/ 512;
729 fd_req
->current_nr_sectors
-= n
;
730 fd_req
->buffer
+= n
* 512;
733 if (fs
->retries
< 5) {
737 printk("swim3: error %sing block %ld (err=%x)\n",
738 rq_data_dir(fd_req
) == WRITE
? "writ": "read",
739 (long)fd_req
->sector
, err
);
740 end_request(fd_req
, 0);
744 if ((stat
& ACTIVE
) == 0 || resid
!= 0) {
745 /* musta been an error */
746 printk(KERN_ERR
"swim3: fd dma: stat=%x resid=%d\n", stat
, resid
);
747 printk(KERN_ERR
" state=%d, dir=%lx, intr=%x, err=%x\n",
748 fs
->state
, rq_data_dir(fd_req
), intr
, err
);
749 end_request(fd_req
, 0);
754 fd_req
->sector
+= fs
->scount
;
755 fd_req
->current_nr_sectors
-= fs
->scount
;
756 fd_req
->buffer
+= fs
->scount
* 512;
757 if (fd_req
->current_nr_sectors
<= 0) {
758 end_request(fd_req
, 1);
761 fs
->req_sector
+= fs
->scount
;
762 if (fs
->req_sector
> fs
->secpertrack
) {
763 fs
->req_sector
-= fs
->secpertrack
;
764 if (++fs
->head
> 1) {
772 if (fs
->state
== idle
)
776 printk(KERN_ERR
"swim3: don't know what to do in state %d\n", fs
->state
);
782 static void fd_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
787 static int grab_drive(struct floppy_state
*fs
, enum swim_state state
,
792 spin_lock_irqsave(&fs
->lock
, flags
);
793 if (fs
->state
!= idle
) {
795 while (fs
->state
!= available
) {
796 if (interruptible
&& signal_pending(current
)) {
798 spin_unlock_irqrestore(&fs
->lock
, flags
);
801 interruptible_sleep_on(&fs
->wait
);
806 spin_unlock_irqrestore(&fs
->lock
, flags
);
810 static void release_drive(struct floppy_state
*fs
)
814 spin_lock_irqsave(&fs
->lock
, flags
);
817 spin_unlock_irqrestore(&fs
->lock
, flags
);
820 static int fd_eject(struct floppy_state
*fs
)
824 err
= grab_drive(fs
, ejecting
, 1);
827 swim3_action(fs
, EJECT
);
828 for (n
= 20; n
> 0; --n
) {
829 if (signal_pending(current
)) {
833 swim3_select(fs
, RELAX
);
834 schedule_timeout_interruptible(1);
835 if (swim3_readbit(fs
, DISK_IN
) == 0)
838 swim3_select(fs
, RELAX
);
845 static struct floppy_struct floppy_type
=
846 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,NULL
}; /* 7 1.44MB 3.5" */
848 static int floppy_ioctl(struct inode
*inode
, struct file
*filp
,
849 unsigned int cmd
, unsigned long param
)
851 struct floppy_state
*fs
= inode
->i_bdev
->bd_disk
->private_data
;
854 if ((cmd
& 0x80) && !capable(CAP_SYS_ADMIN
))
857 #ifdef CONFIG_PMAC_MEDIABAY
858 if (fs
->media_bay
&& check_media_bay(fs
->media_bay
, MB_FD
))
864 if (fs
->ref_count
!= 1)
869 if (copy_to_user((void __user
*) param
, &floppy_type
,
870 sizeof(struct floppy_struct
)))
877 static int floppy_open(struct inode
*inode
, struct file
*filp
)
879 struct floppy_state
*fs
= inode
->i_bdev
->bd_disk
->private_data
;
880 struct swim3 __iomem
*sw
= fs
->swim3
;
883 if (fs
->ref_count
== 0) {
884 #ifdef CONFIG_PMAC_MEDIABAY
885 if (fs
->media_bay
&& check_media_bay(fs
->media_bay
, MB_FD
))
888 out_8(&sw
->setup
, S_IBM_DRIVE
| S_FCLK_DIV2
);
889 out_8(&sw
->control_bic
, 0xff);
890 out_8(&sw
->mode
, 0x95);
892 out_8(&sw
->intr_enable
, 0);
893 out_8(&sw
->control_bis
, DRIVE_ENABLE
| INTR_ENABLE
);
894 swim3_action(fs
, MOTOR_ON
);
897 for (n
= 0; n
< 2 * HZ
; ++n
) {
898 if (n
>= HZ
/30 && swim3_readbit(fs
, SEEK_COMPLETE
))
900 if (signal_pending(current
)) {
904 swim3_select(fs
, RELAX
);
905 schedule_timeout_interruptible(1);
907 if (err
== 0 && (swim3_readbit(fs
, SEEK_COMPLETE
) == 0
908 || swim3_readbit(fs
, DISK_IN
) == 0))
910 swim3_action(fs
, SETMFM
);
911 swim3_select(fs
, RELAX
);
913 } else if (fs
->ref_count
== -1 || filp
->f_flags
& O_EXCL
)
916 if (err
== 0 && (filp
->f_flags
& O_NDELAY
) == 0
917 && (filp
->f_mode
& 3)) {
918 check_disk_change(inode
->i_bdev
);
923 if (err
== 0 && (filp
->f_mode
& 2)) {
924 if (fs
->write_prot
< 0)
925 fs
->write_prot
= swim3_readbit(fs
, WRITE_PROT
);
931 if (fs
->ref_count
== 0) {
932 swim3_action(fs
, MOTOR_OFF
);
933 out_8(&sw
->control_bic
, DRIVE_ENABLE
| INTR_ENABLE
);
934 swim3_select(fs
, RELAX
);
939 if (filp
->f_flags
& O_EXCL
)
947 static int floppy_release(struct inode
*inode
, struct file
*filp
)
949 struct floppy_state
*fs
= inode
->i_bdev
->bd_disk
->private_data
;
950 struct swim3 __iomem
*sw
= fs
->swim3
;
951 if (fs
->ref_count
> 0 && --fs
->ref_count
== 0) {
952 swim3_action(fs
, MOTOR_OFF
);
953 out_8(&sw
->control_bic
, 0xff);
954 swim3_select(fs
, RELAX
);
959 static int floppy_check_change(struct gendisk
*disk
)
961 struct floppy_state
*fs
= disk
->private_data
;
965 static int floppy_revalidate(struct gendisk
*disk
)
967 struct floppy_state
*fs
= disk
->private_data
;
968 struct swim3 __iomem
*sw
;
971 #ifdef CONFIG_PMAC_MEDIABAY
972 if (fs
->media_bay
&& check_media_bay(fs
->media_bay
, MB_FD
))
977 grab_drive(fs
, revalidating
, 0);
978 out_8(&sw
->intr_enable
, 0);
979 out_8(&sw
->control_bis
, DRIVE_ENABLE
);
980 swim3_action(fs
, MOTOR_ON
); /* necessary? */
984 for (n
= HZ
; n
> 0; --n
) {
985 if (swim3_readbit(fs
, SEEK_COMPLETE
))
987 if (signal_pending(current
))
989 swim3_select(fs
, RELAX
);
990 schedule_timeout_interruptible(1);
992 ret
= swim3_readbit(fs
, SEEK_COMPLETE
) == 0
993 || swim3_readbit(fs
, DISK_IN
) == 0;
995 swim3_action(fs
, MOTOR_OFF
);
998 swim3_action(fs
, SETMFM
);
1000 swim3_select(fs
, RELAX
);
1006 static struct block_device_operations floppy_fops
= {
1007 .open
= floppy_open
,
1008 .release
= floppy_release
,
1009 .ioctl
= floppy_ioctl
,
1010 .media_changed
= floppy_check_change
,
1011 .revalidate_disk
= floppy_revalidate
,
1014 int swim3_init(void)
1016 struct device_node
*swim
;
1020 swim
= find_devices("floppy");
1021 while (swim
&& (floppy_count
< MAX_FLOPPIES
))
1023 swim3_add_device(swim
);
1027 swim
= find_devices("swim3");
1028 while (swim
&& (floppy_count
< MAX_FLOPPIES
))
1030 swim3_add_device(swim
);
1037 for (i
= 0; i
< floppy_count
; i
++) {
1038 disks
[i
] = alloc_disk(1);
1043 if (register_blkdev(FLOPPY_MAJOR
, "fd")) {
1048 swim3_queue
= blk_init_queue(do_fd_request
, &swim3_lock
);
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 set_capacity(disk
, 2880);
1069 unregister_blkdev(FLOPPY_MAJOR
, "fd");
1073 /* shouldn't we do something with results of swim_add_device()? */
1077 static int swim3_add_device(struct device_node
*swim
)
1079 struct device_node
*mediabay
;
1080 struct floppy_state
*fs
= &floppy_states
[floppy_count
];
1081 struct resource res_reg
, res_dma
;
1083 if (of_address_to_resource(swim
, 0, &res_reg
) ||
1084 of_address_to_resource(swim
, 1, &res_dma
)) {
1085 printk(KERN_ERR
"swim3: Can't get addresses\n");
1088 if (request_mem_region(res_reg
.start
, res_reg
.end
- res_reg
.start
+ 1,
1089 " (reg)") == NULL
) {
1090 printk(KERN_ERR
"swim3: Can't request register space\n");
1093 if (request_mem_region(res_dma
.start
, res_dma
.end
- res_dma
.start
+ 1,
1094 " (dma)") == NULL
) {
1095 release_mem_region(res_reg
.start
,
1096 res_reg
.end
- res_reg
.start
+ 1);
1097 printk(KERN_ERR
"swim3: Can't request DMA space\n");
1101 if (swim
->n_intrs
< 2) {
1102 printk(KERN_INFO
"swim3: expecting 2 intrs (n_intrs:%d)\n",
1104 release_mem_region(res_reg
.start
,
1105 res_reg
.end
- res_reg
.start
+ 1);
1106 release_mem_region(res_dma
.start
,
1107 res_dma
.end
- res_dma
.start
+ 1);
1111 mediabay
= (strcasecmp(swim
->parent
->type
, "media-bay") == 0) ? swim
->parent
: NULL
;
1112 if (mediabay
== NULL
)
1113 pmac_call_feature(PMAC_FTR_SWIM3_ENABLE
, swim
, 0, 1);
1115 memset(fs
, 0, sizeof(*fs
));
1116 spin_lock_init(&fs
->lock
);
1118 fs
->swim3
= (struct swim3 __iomem
*)ioremap(res_reg
.start
, 0x200);
1119 fs
->dma
= (struct dbdma_regs __iomem
*)ioremap(res_dma
.start
, 0x200);
1120 fs
->swim3_intr
= swim
->intrs
[0].line
;
1121 fs
->dma_intr
= swim
->intrs
[1].line
;
1123 fs
->cur_sector
= -1;
1125 fs
->secpertrack
= 18;
1126 fs
->total_secs
= 2880;
1127 fs
->media_bay
= mediabay
;
1128 init_waitqueue_head(&fs
->wait
);
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
);
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);
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",
1143 pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 0);
1148 init_timer(&fs
->timeout
);
1150 printk(KERN_INFO
"fd%d: SWIM3 floppy controller %s\n", floppy_count
,
1151 mediabay
? "in media bay" : "");
1158 module_init(swim3_init
)
1160 MODULE_LICENSE("GPL");
1161 MODULE_AUTHOR("Paul Mackerras");
1162 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR
);