2 * linux/drivers/block/floppy.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 * Copyright (C) 1993, 1994 Alain Knaff
6 * Copyright (C) 1998 Alan Cox
10 * 02.12.91 - Changed to static variables to indicate need for reset
11 * and recalibrate. This makes some things easier (output_byte reset
12 * checking etc), and means less interrupt jumping in case of errors,
13 * so the code is hopefully easier to understand.
17 * This file is certainly a mess. I've tried my best to get it working,
18 * but I don't like programming floppies, and I have only one anyway.
19 * Urgel. I should check for more errors, and do more graceful error
20 * recovery. Seems there are problems with several drives. I've tried to
21 * correct them. No promises.
25 * As with hd.c, all routines within this file can (and will) be called
26 * by interrupts, so extreme caution is needed. A hardware interrupt
27 * handler may not sleep, or a kernel panic will happen. Thus I cannot
28 * call "floppy-on" directly, but have to set a special timer interrupt
33 * 28.02.92 - made track-buffering routines, based on the routines written
34 * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus.
38 * Automatic floppy-detection and formatting written by Werner Almesberger
39 * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with
40 * the floppy-change signal detection.
44 * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed
45 * FDC data overrun bug, added some preliminary stuff for vertical
48 * 1992/9/17: Added DMA allocation & DMA functions. -- hhb.
50 * TODO: Errors are still not counted properly.
54 * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl)
55 * modeled after the freeware MS-DOS program fdformat/88 V1.8 by
56 * Christoph H. Hochst\"atter.
57 * I have fixed the shift values to the ones I always use. Maybe a new
58 * ioctl() should be created to be able to modify them.
59 * There is a bug in the driver that makes it impossible to format a
60 * floppy as the first thing after bootup.
64 * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and
65 * this helped the floppy driver as well. Much cleaner, and still seems to
69 /* 1994/6/24 --bbroad-- added the floppy table entries and made
70 * minor modifications to allow 2.88 floppies to be run.
73 /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more
78 * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger
79 * format bug fixes, but unfortunately some new bugs too...
82 /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write
83 * errors to allow safe writing by specialized programs.
86 /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks
87 * by defining bit 1 of the "stretch" parameter to mean put sectors on the
88 * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's
89 * drives are "upside-down").
93 * 1995/8/26 -- Andreas Busse -- added Mips support.
97 * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent
98 * features to asm/floppy.h.
102 * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
106 * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of
107 * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting &
108 * use of '0' for NULL.
112 * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation
117 * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives.
121 * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24
122 * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were
123 * being used to store jiffies, which are unsigned longs).
127 * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br>
128 * - get rid of check_region
133 * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no
134 * floppy controller (lingering task on list after module is gone... boom.)
138 * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range
139 * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix
140 * requires many non-obvious changes in arch dependent code.
143 /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>.
144 * Better audit of register_blkdev.
147 #define FLOPPY_SANITY_CHECK
148 #undef FLOPPY_SILENT_DCL_CLEAR
150 #define REALLY_SLOW_IO
153 #define DCL_DEBUG /* debug disk change line */
155 /* do print messages for unexpected interrupts */
156 static int print_unex
= 1;
157 #include <linux/module.h>
158 #include <linux/sched.h>
159 #include <linux/fs.h>
160 #include <linux/kernel.h>
161 #include <linux/timer.h>
162 #include <linux/workqueue.h>
164 #include <linux/fdreg.h>
165 #include <linux/fd.h>
166 #include <linux/hdreg.h>
167 #include <linux/errno.h>
168 #include <linux/slab.h>
169 #include <linux/mm.h>
170 #include <linux/bio.h>
171 #include <linux/string.h>
172 #include <linux/jiffies.h>
173 #include <linux/fcntl.h>
174 #include <linux/delay.h>
175 #include <linux/mc146818rtc.h> /* CMOS defines */
176 #include <linux/ioport.h>
177 #include <linux/interrupt.h>
178 #include <linux/init.h>
179 #include <linux/platform_device.h>
180 #include <linux/buffer_head.h> /* for invalidate_buffers() */
181 #include <linux/mutex.h>
184 * PS/2 floppies have much slower step rates than regular floppies.
185 * It's been recommended that take about 1/4 of the default speed
186 * in some more extreme cases.
188 static int slow_floppy
;
192 #include <asm/system.h>
194 #include <asm/uaccess.h>
196 static int FLOPPY_IRQ
= 6;
197 static int FLOPPY_DMA
= 2;
198 static int can_use_virtual_dma
= 2;
200 * can use virtual DMA:
201 * 0 = use of virtual DMA disallowed by config
202 * 1 = use of virtual DMA prescribed by config
203 * 2 = no virtual DMA preference configured. By default try hard DMA,
204 * but fall back on virtual DMA when not enough memory available
207 static int use_virtual_dma
;
211 * 1 using virtual DMA
212 * This variable is set to virtual when a DMA mem problem arises, and
213 * reset back in floppy_grab_irq_and_dma.
214 * It is not safe to reset it in other circumstances, because the floppy
215 * driver may have several buffers in use at once, and we do currently not
216 * record each buffers capabilities
219 static DEFINE_SPINLOCK(floppy_lock
);
220 <<<<<<< HEAD
:drivers
/block
/floppy
.c
221 static struct completion device_release
;
223 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/block
/floppy
.c
225 static unsigned short virtual_dma_port
= 0x3f0;
226 irqreturn_t
floppy_interrupt(int irq
, void *dev_id
);
227 static int set_dor(int fdc
, char mask
, char data
);
229 #define K_64 0x10000 /* 64KB */
231 /* the following is the mask of allowed drives. By default units 2 and
232 * 3 of both floppy controllers are disabled, because switching on the
233 * motor of these drives causes system hangs on some PCI computers. drive
234 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
235 * a drive is allowed.
237 * NOTE: This must come before we include the arch floppy header because
238 * some ports reference this variable from there. -DaveM
241 static int allowed_drive_mask
= 0x33;
243 #include <asm/floppy.h>
245 static int irqdma_allocated
;
247 #define DEVICE_NAME "floppy"
249 #include <linux/blkdev.h>
250 #include <linux/blkpg.h>
251 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
252 #include <linux/completion.h>
254 static struct request
*current_req
;
255 static struct request_queue
*floppy_queue
;
256 static void do_fd_request(struct request_queue
* q
);
258 #ifndef fd_get_dma_residue
259 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
262 /* Dma Memory related stuff */
264 #ifndef fd_dma_mem_free
265 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
268 #ifndef fd_dma_mem_alloc
269 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL,get_order(size))
272 static inline void fallback_on_nodma_alloc(char **addr
, size_t l
)
274 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
276 return; /* we have the memory */
277 if (can_use_virtual_dma
!= 2)
278 return; /* no fallback allowed */
279 printk("DMA memory shortage. Temporarily falling back on virtual DMA\n");
280 *addr
= (char *)nodma_mem_alloc(l
);
286 /* End dma memory related stuff */
288 static unsigned long fake_change
;
289 static int initialising
= 1;
291 #define ITYPE(x) (((x)>>2) & 0x1f)
292 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
293 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
294 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
295 /* reverse mapping from unit and fdc to drive */
296 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
297 #define DP (&drive_params[current_drive])
298 #define DRS (&drive_state[current_drive])
299 #define DRWE (&write_errors[current_drive])
300 #define FDCS (&fdc_state[fdc])
301 #define CLEARF(x) clear_bit(x##_BIT, &DRS->flags)
302 #define SETF(x) set_bit(x##_BIT, &DRS->flags)
303 #define TESTF(x) test_bit(x##_BIT, &DRS->flags)
305 #define UDP (&drive_params[drive])
306 #define UDRS (&drive_state[drive])
307 #define UDRWE (&write_errors[drive])
308 #define UFDCS (&fdc_state[FDC(drive)])
309 #define UCLEARF(x) clear_bit(x##_BIT, &UDRS->flags)
310 #define USETF(x) set_bit(x##_BIT, &UDRS->flags)
311 #define UTESTF(x) test_bit(x##_BIT, &UDRS->flags)
313 #define DPRINT(format, args...) printk(DEVICE_NAME "%d: " format, current_drive , ## args)
315 #define PH_HEAD(floppy,head) (((((floppy)->stretch & 2) >>1) ^ head) << 2)
316 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
318 #define CLEARSTRUCT(x) memset((x), 0, sizeof(*(x)))
321 #define COMMAND raw_cmd->cmd[0]
322 #define DR_SELECT raw_cmd->cmd[1]
323 #define TRACK raw_cmd->cmd[2]
324 #define HEAD raw_cmd->cmd[3]
325 #define SECTOR raw_cmd->cmd[4]
326 #define SIZECODE raw_cmd->cmd[5]
327 #define SECT_PER_TRACK raw_cmd->cmd[6]
328 #define GAP raw_cmd->cmd[7]
329 #define SIZECODE2 raw_cmd->cmd[8]
333 #define F_SIZECODE raw_cmd->cmd[2]
334 #define F_SECT_PER_TRACK raw_cmd->cmd[3]
335 #define F_GAP raw_cmd->cmd[4]
336 #define F_FILL raw_cmd->cmd[5]
340 * Maximum disk size (in kilobytes). This default is used whenever the
341 * current disk size is unknown.
342 * [Now it is rather a minimum]
344 #define MAX_DISK_SIZE 4 /* 3984 */
347 * globals used by 'result()'
349 #define MAX_REPLIES 16
350 static unsigned char reply_buffer
[MAX_REPLIES
];
351 static int inr
; /* size of reply buffer, when called from interrupt */
352 #define ST0 (reply_buffer[0])
353 #define ST1 (reply_buffer[1])
354 #define ST2 (reply_buffer[2])
355 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */
356 #define R_TRACK (reply_buffer[3])
357 #define R_HEAD (reply_buffer[4])
358 #define R_SECTOR (reply_buffer[5])
359 #define R_SIZECODE (reply_buffer[6])
360 #define SEL_DLY (2*HZ/100)
363 * this struct defines the different floppy drive types.
366 struct floppy_drive_params params
;
367 const char *name
; /* name printed while booting */
368 } default_drive_params
[] = {
369 /* NOTE: the time values in jiffies should be in msec!
371 | Maximum data rate supported by drive type
372 | | Head load time, msec
373 | | | Head unload time, msec (not used)
374 | | | | Step rate interval, usec
375 | | | | | Time needed for spinup time (jiffies)
376 | | | | | | Timeout for spinning down (jiffies)
377 | | | | | | | Spindown offset (where disk stops)
378 | | | | | | | | Select delay
379 | | | | | | | | | RPS
380 | | | | | | | | | | Max number of tracks
381 | | | | | | | | | | | Interrupt timeout
382 | | | | | | | | | | | | Max nonintlv. sectors
383 | | | | | | | | | | | | | -Max Errors- flags */
384 {{0, 500, 16, 16, 8000, 1*HZ
, 3*HZ
, 0, SEL_DLY
, 5, 80, 3*HZ
, 20, {3,1,2,0,2}, 0,
385 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ
/2, 0 }, "unknown" },
387 {{1, 300, 16, 16, 8000, 1*HZ
, 3*HZ
, 0, SEL_DLY
, 5, 40, 3*HZ
, 17, {3,1,2,0,2}, 0,
388 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ
/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
390 {{2, 500, 16, 16, 6000, 4*HZ
/10, 3*HZ
, 14, SEL_DLY
, 6, 83, 3*HZ
, 17, {3,1,2,0,2}, 0,
391 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ
/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
393 {{3, 250, 16, 16, 3000, 1*HZ
, 3*HZ
, 0, SEL_DLY
, 5, 83, 3*HZ
, 20, {3,1,2,0,2}, 0,
394 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ
/2, 4 }, "720k" }, /*3 1/2 DD*/
396 {{4, 500, 16, 16, 4000, 4*HZ
/10, 3*HZ
, 10, SEL_DLY
, 5, 83, 3*HZ
, 20, {3,1,2,0,2}, 0,
397 0, { 7, 4,25,22,31,21,29,11}, 3*HZ
/2, 7 }, "1.44M" }, /*3 1/2 HD*/
399 {{5, 1000, 15, 8, 3000, 4*HZ
/10, 3*HZ
, 10, SEL_DLY
, 5, 83, 3*HZ
, 40, {3,1,2,0,2}, 0,
400 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ
/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
402 {{6, 1000, 15, 8, 3000, 4*HZ
/10, 3*HZ
, 10, SEL_DLY
, 5, 83, 3*HZ
, 40, {3,1,2,0,2}, 0,
403 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ
/2, 8 }, "2.88M" } /*3 1/2 ED*/
404 /* | --autodetected formats--- | | |
405 * read_track | | Name printed when booting
407 * Frequency of disk change checks */
410 static struct floppy_drive_params drive_params
[N_DRIVE
];
411 static struct floppy_drive_struct drive_state
[N_DRIVE
];
412 static struct floppy_write_errors write_errors
[N_DRIVE
];
413 static struct timer_list motor_off_timer
[N_DRIVE
];
414 static struct gendisk
*disks
[N_DRIVE
];
415 static struct block_device
*opened_bdev
[N_DRIVE
];
416 static DEFINE_MUTEX(open_lock
);
417 static struct floppy_raw_cmd
*raw_cmd
, default_raw_cmd
;
420 * This struct defines the different floppy types.
422 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
423 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
424 * tells if the disk is in Commodore 1581 format, which means side 0 sectors
425 * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
426 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
427 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
428 * side 0 is on physical side 0 (but with the misnamed sector IDs).
429 * 'stretch' should probably be renamed to something more general, like
430 * 'options'. Other parameters should be self-explanatory (see also
440 | | | | | | Data rate, | 0x40 for perp
441 | | | | | | | Spec1 (stepping rate, head unload
442 | | | | | | | | /fmt gap (gap2) */
443 static struct floppy_struct floppy_type
[32] = {
444 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL
}, /* 0 no testing */
445 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
446 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
447 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
448 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
449 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
450 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
451 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
452 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
453 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
455 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
456 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
457 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
458 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
459 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
460 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
461 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
462 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
463 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
464 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
466 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
467 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
468 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
469 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
470 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
471 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
472 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
473 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
474 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
475 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
477 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
478 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
481 #define SECTSIZE (_FD_SECTSIZE(*floppy))
483 /* Auto-detection: Disk type used until the next media change occurs. */
484 static struct floppy_struct
*current_type
[N_DRIVE
];
487 * User-provided type information. current_type points to
488 * the respective entry of this array.
490 static struct floppy_struct user_params
[N_DRIVE
];
492 static sector_t floppy_sizes
[256];
494 static char floppy_device_name
[] = "floppy";
497 * The driver is trying to determine the correct media format
498 * while probing is set. rw_interrupt() clears it after a
503 /* Synchronization of FDC access. */
504 #define FD_COMMAND_NONE -1
505 #define FD_COMMAND_ERROR 2
506 #define FD_COMMAND_OKAY 3
508 static volatile int command_status
= FD_COMMAND_NONE
;
509 static unsigned long fdc_busy
;
510 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait
);
511 static DECLARE_WAIT_QUEUE_HEAD(command_done
);
513 #define NO_SIGNAL (!interruptible || !signal_pending(current))
514 #define CALL(x) if ((x) == -EINTR) return -EINTR
515 #define ECALL(x) if ((ret = (x))) return ret;
516 #define _WAIT(x,i) CALL(ret=wait_til_done((x),i))
517 #define WAIT(x) _WAIT((x),interruptible)
518 #define IWAIT(x) _WAIT((x),1)
520 /* Errors during formatting are counted here. */
521 static int format_errors
;
523 /* Format request descriptor. */
524 static struct format_descr format_req
;
527 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
528 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
529 * H is head unload time (1=16ms, 2=32ms, etc)
534 * Because these are written to by the DMA controller, they must
535 * not contain a 64k byte boundary crossing, or data will be
538 static char *floppy_track_buffer
;
539 static int max_buffer_sectors
;
542 typedef void (*done_f
)(int);
543 static struct cont_t
{
544 void (*interrupt
)(void); /* this is called after the interrupt of the
546 void (*redo
)(void); /* this is called to retry the operation */
547 void (*error
)(void); /* this is called to tally an error */
548 done_f done
; /* this is called to say if the operation has
549 * succeeded/failed */
552 static void floppy_ready(void);
553 static void floppy_start(void);
554 static void process_fd_request(void);
555 static void recalibrate_floppy(void);
556 static void floppy_shutdown(unsigned long);
558 static int floppy_grab_irq_and_dma(void);
559 static void floppy_release_irq_and_dma(void);
562 * The "reset" variable should be tested whenever an interrupt is scheduled,
563 * after the commands have been sent. This is to ensure that the driver doesn't
564 * get wedged when the interrupt doesn't come because of a failed command.
565 * reset doesn't need to be tested before sending commands, because
566 * output_byte is automatically disabled when reset is set.
568 #define CHECK_RESET { if (FDCS->reset){ reset_fdc(); return; } }
569 static void reset_fdc(void);
572 * These are global variables, as that's the easiest way to give
573 * information to interrupts. They are the data used for the current
577 #define NEED_1_RECAL -2
578 #define NEED_2_RECAL -3
580 static int usage_count
;
582 /* buffer related variables */
583 static int buffer_track
= -1;
584 static int buffer_drive
= -1;
585 static int buffer_min
= -1;
586 static int buffer_max
= -1;
588 /* fdc related variables, should end up in a struct */
589 static struct floppy_fdc_state fdc_state
[N_FDC
];
590 static int fdc
; /* current fdc */
592 static struct floppy_struct
*_floppy
= floppy_type
;
593 static unsigned char current_drive
;
594 static long current_count_sectors
;
595 static unsigned char fsector_t
; /* sector in track */
596 static unsigned char in_sector_offset
; /* offset within physical sector,
597 * expressed in units of 512 bytes */
600 static inline int fd_eject(int drive
)
611 static long unsigned debugtimer
;
613 static inline void set_debugt(void)
615 debugtimer
= jiffies
;
618 static inline void debugt(const char *message
)
620 if (DP
->flags
& DEBUGT
)
621 printk("%s dtime=%lu\n", message
, jiffies
- debugtimer
);
624 static inline void set_debugt(void) { }
625 static inline void debugt(const char *message
) { }
628 typedef void (*timeout_fn
) (unsigned long);
629 static DEFINE_TIMER(fd_timeout
, floppy_shutdown
, 0, 0);
631 static const char *timeout_message
;
633 #ifdef FLOPPY_SANITY_CHECK
634 static void is_alive(const char *message
)
636 /* this routine checks whether the floppy driver is "alive" */
637 if (test_bit(0, &fdc_busy
) && command_status
< 2
638 && !timer_pending(&fd_timeout
)) {
639 DPRINT("timeout handler died: %s\n", message
);
644 static void (*do_floppy
) (void) = NULL
;
646 #ifdef FLOPPY_SANITY_CHECK
650 static void (*lasthandler
) (void);
651 static unsigned long interruptjiffies
;
652 static unsigned long resultjiffies
;
653 static int resultsize
;
654 static unsigned long lastredo
;
656 static struct output_log
{
658 unsigned char status
;
659 unsigned long jiffies
;
660 } output_log
[OLOGSIZE
];
662 static int output_log_pos
;
665 #define current_reqD -1
666 #define MAXTIMEOUT -2
668 static void __reschedule_timeout(int drive
, const char *message
, int marg
)
670 if (drive
== current_reqD
)
671 drive
= current_drive
;
672 del_timer(&fd_timeout
);
673 if (drive
< 0 || drive
>= N_DRIVE
) {
674 fd_timeout
.expires
= jiffies
+ 20UL * HZ
;
677 fd_timeout
.expires
= jiffies
+ UDP
->timeout
;
678 add_timer(&fd_timeout
);
679 if (UDP
->flags
& FD_DEBUG
) {
680 DPRINT("reschedule timeout ");
681 printk(message
, marg
);
684 timeout_message
= message
;
687 static void reschedule_timeout(int drive
, const char *message
, int marg
)
691 spin_lock_irqsave(&floppy_lock
, flags
);
692 __reschedule_timeout(drive
, message
, marg
);
693 spin_unlock_irqrestore(&floppy_lock
, flags
);
696 #define INFBOUND(a,b) (a)=max_t(int, a, b)
697 #define SUPBOUND(a,b) (a)=min_t(int, a, b)
700 * Bottom half floppy driver.
701 * ==========================
703 * This part of the file contains the code talking directly to the hardware,
704 * and also the main service loop (seek-configure-spinup-command)
709 * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
710 * and the last_checked date.
712 * last_checked is the date of the last check which showed 'no disk change'
713 * FD_DISK_CHANGE is set under two conditions:
714 * 1. The floppy has been changed after some i/o to that floppy already
716 * 2. No floppy disk is in the drive. This is done in order to ensure that
717 * requests are quickly flushed in case there is no disk in the drive. It
718 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
721 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
722 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
723 * each seek. If a disk is present, the disk change line should also be
724 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
725 * change line is set, this means either that no disk is in the drive, or
726 * that it has been removed since the last seek.
728 * This means that we really have a third possibility too:
729 * The floppy has been changed after the last seek.
732 static int disk_change(int drive
)
734 int fdc
= FDC(drive
);
736 #ifdef FLOPPY_SANITY_CHECK
737 if (time_before(jiffies
, UDRS
->select_date
+ UDP
->select_delay
))
738 DPRINT("WARNING disk change called early\n");
739 if (!(FDCS
->dor
& (0x10 << UNIT(drive
))) ||
740 (FDCS
->dor
& 3) != UNIT(drive
) || fdc
!= FDC(drive
)) {
741 DPRINT("probing disk change on unselected drive\n");
742 DPRINT("drive=%d fdc=%d dor=%x\n", drive
, FDC(drive
),
743 (unsigned int)FDCS
->dor
);
748 if (UDP
->flags
& FD_DEBUG
) {
749 DPRINT("checking disk change line for drive %d\n", drive
);
750 DPRINT("jiffies=%lu\n", jiffies
);
751 DPRINT("disk change line=%x\n", fd_inb(FD_DIR
) & 0x80);
752 DPRINT("flags=%lx\n", UDRS
->flags
);
755 if (UDP
->flags
& FD_BROKEN_DCL
)
756 return UTESTF(FD_DISK_CHANGED
);
757 if ((fd_inb(FD_DIR
) ^ UDP
->flags
) & 0x80) {
758 USETF(FD_VERIFY
); /* verify write protection */
759 if (UDRS
->maxblock
) {
760 /* mark it changed */
761 USETF(FD_DISK_CHANGED
);
764 /* invalidate its geometry */
765 if (UDRS
->keep_data
>= 0) {
766 if ((UDP
->flags
& FTD_MSG
) &&
767 current_type
[drive
] != NULL
)
768 DPRINT("Disk type is undefined after "
770 current_type
[drive
] = NULL
;
771 floppy_sizes
[TOMINOR(drive
)] = MAX_DISK_SIZE
<< 1;
776 UDRS
->last_checked
= jiffies
;
777 UCLEARF(FD_DISK_NEWCHANGE
);
782 static inline int is_selected(int dor
, int unit
)
784 return ((dor
& (0x10 << unit
)) && (dor
& 3) == unit
);
787 static int set_dor(int fdc
, char mask
, char data
)
791 unsigned char newdor
;
792 unsigned char olddor
;
794 if (FDCS
->address
== -1)
798 newdor
= (olddor
& mask
) | data
;
799 if (newdor
!= olddor
) {
801 if (is_selected(olddor
, unit
) && !is_selected(newdor
, unit
)) {
802 drive
= REVDRIVE(fdc
, unit
);
804 if (UDP
->flags
& FD_DEBUG
) {
805 DPRINT("calling disk change from set_dor\n");
811 fd_outb(newdor
, FD_DOR
);
814 if (!is_selected(olddor
, unit
) && is_selected(newdor
, unit
)) {
815 drive
= REVDRIVE(fdc
, unit
);
816 UDRS
->select_date
= jiffies
;
822 static void twaddle(void)
824 if (DP
->select_delay
)
826 fd_outb(FDCS
->dor
& ~(0x10 << UNIT(current_drive
)), FD_DOR
);
827 fd_outb(FDCS
->dor
, FD_DOR
);
828 DRS
->select_date
= jiffies
;
831 /* reset all driver information about the current fdc. This is needed after
832 * a reset, and after a raw command. */
833 static void reset_fdc_info(int mode
)
837 FDCS
->spec1
= FDCS
->spec2
= -1;
838 FDCS
->need_configure
= 1;
841 for (drive
= 0; drive
< N_DRIVE
; drive
++)
842 if (FDC(drive
) == fdc
&& (mode
|| UDRS
->track
!= NEED_1_RECAL
))
843 UDRS
->track
= NEED_2_RECAL
;
846 /* selects the fdc and drive, and enables the fdc's input/dma. */
847 static void set_fdc(int drive
)
849 if (drive
>= 0 && drive
< N_DRIVE
) {
851 current_drive
= drive
;
853 if (fdc
!= 1 && fdc
!= 0) {
854 printk("bad fdc value\n");
859 set_dor(1 - fdc
, ~8, 0);
861 if (FDCS
->rawcmd
== 2)
863 if (fd_inb(FD_STATUS
) != STATUS_READY
)
867 /* locks the driver */
868 static int _lock_fdc(int drive
, int interruptible
, int line
)
872 "Trying to lock fdc while usage count=0 at line %d\n",
877 if (test_and_set_bit(0, &fdc_busy
)) {
878 DECLARE_WAITQUEUE(wait
, current
);
879 add_wait_queue(&fdc_wait
, &wait
);
882 set_current_state(TASK_INTERRUPTIBLE
);
884 if (!test_and_set_bit(0, &fdc_busy
))
890 remove_wait_queue(&fdc_wait
, &wait
);
895 set_current_state(TASK_RUNNING
);
896 remove_wait_queue(&fdc_wait
, &wait
);
897 flush_scheduled_work();
899 command_status
= FD_COMMAND_NONE
;
901 __reschedule_timeout(drive
, "lock fdc", 0);
906 #define lock_fdc(drive,interruptible) _lock_fdc(drive,interruptible, __LINE__)
908 #define LOCK_FDC(drive,interruptible) \
909 if (lock_fdc(drive,interruptible)) return -EINTR;
911 /* unlocks the driver */
912 static inline void unlock_fdc(void)
917 if (!test_bit(0, &fdc_busy
))
918 DPRINT("FDC access conflict!\n");
921 DPRINT("device interrupt still active at FDC release: %p!\n",
923 command_status
= FD_COMMAND_NONE
;
924 spin_lock_irqsave(&floppy_lock
, flags
);
925 del_timer(&fd_timeout
);
927 clear_bit(0, &fdc_busy
);
928 if (elv_next_request(floppy_queue
))
929 do_fd_request(floppy_queue
);
930 spin_unlock_irqrestore(&floppy_lock
, flags
);
934 /* switches the motor off after a given timeout */
935 static void motor_off_callback(unsigned long nr
)
937 unsigned char mask
= ~(0x10 << UNIT(nr
));
939 set_dor(FDC(nr
), mask
, 0);
942 /* schedules motor off */
943 static void floppy_off(unsigned int drive
)
945 unsigned long volatile delta
;
946 int fdc
= FDC(drive
);
948 if (!(FDCS
->dor
& (0x10 << UNIT(drive
))))
951 del_timer(motor_off_timer
+ drive
);
953 /* make spindle stop in a position which minimizes spinup time
956 delta
= jiffies
- UDRS
->first_read_date
+ HZ
-
957 UDP
->spindown_offset
;
958 delta
= ((delta
* UDP
->rps
) % HZ
) / UDP
->rps
;
959 motor_off_timer
[drive
].expires
=
960 jiffies
+ UDP
->spindown
- delta
;
962 add_timer(motor_off_timer
+ drive
);
966 * cycle through all N_DRIVE floppy drives, for disk change testing.
967 * stopping at current drive. This is done before any long operation, to
968 * be sure to have up to date disk change information.
970 static void scandrives(void)
976 if (DP
->select_delay
)
979 saved_drive
= current_drive
;
980 for (i
= 0; i
< N_DRIVE
; i
++) {
981 drive
= (saved_drive
+ i
+ 1) % N_DRIVE
;
982 if (UDRS
->fd_ref
== 0 || UDP
->select_delay
!= 0)
983 continue; /* skip closed drives */
985 if (!(set_dor(fdc
, ~3, UNIT(drive
) | (0x10 << UNIT(drive
))) &
986 (0x10 << UNIT(drive
))))
987 /* switch the motor off again, if it was off to
989 set_dor(fdc
, ~(0x10 << UNIT(drive
)), 0);
991 set_fdc(saved_drive
);
994 static void empty(void)
998 static DECLARE_WORK(floppy_work
, NULL
);
1000 static void schedule_bh(void (*handler
) (void))
1002 PREPARE_WORK(&floppy_work
, (work_func_t
)handler
);
1003 schedule_work(&floppy_work
);
1006 static DEFINE_TIMER(fd_timer
, NULL
, 0, 0);
1008 static void cancel_activity(void)
1010 unsigned long flags
;
1012 spin_lock_irqsave(&floppy_lock
, flags
);
1014 PREPARE_WORK(&floppy_work
, (work_func_t
)empty
);
1015 del_timer(&fd_timer
);
1016 spin_unlock_irqrestore(&floppy_lock
, flags
);
1019 /* this function makes sure that the disk stays in the drive during the
1021 static void fd_watchdog(void)
1024 if (DP
->flags
& FD_DEBUG
) {
1025 DPRINT("calling disk change from watchdog\n");
1029 if (disk_change(current_drive
)) {
1030 DPRINT("disk removed during i/o\n");
1035 del_timer(&fd_timer
);
1036 fd_timer
.function
= (timeout_fn
) fd_watchdog
;
1037 fd_timer
.expires
= jiffies
+ HZ
/ 10;
1038 add_timer(&fd_timer
);
1042 static void main_command_interrupt(void)
1044 del_timer(&fd_timer
);
1048 /* waits for a delay (spinup or select) to pass */
1049 static int fd_wait_for_completion(unsigned long delay
, timeout_fn function
)
1052 reset_fdc(); /* do the reset during sleep to win time
1053 * if we don't need to sleep, it's a good
1054 * occasion anyways */
1058 if (time_before(jiffies
, delay
)) {
1059 del_timer(&fd_timer
);
1060 fd_timer
.function
= function
;
1061 fd_timer
.expires
= delay
;
1062 add_timer(&fd_timer
);
1068 static DEFINE_SPINLOCK(floppy_hlt_lock
);
1069 static int hlt_disabled
;
1070 static void floppy_disable_hlt(void)
1072 unsigned long flags
;
1074 spin_lock_irqsave(&floppy_hlt_lock
, flags
);
1075 if (!hlt_disabled
) {
1077 #ifdef HAVE_DISABLE_HLT
1081 spin_unlock_irqrestore(&floppy_hlt_lock
, flags
);
1084 static void floppy_enable_hlt(void)
1086 unsigned long flags
;
1088 spin_lock_irqsave(&floppy_hlt_lock
, flags
);
1091 #ifdef HAVE_DISABLE_HLT
1095 spin_unlock_irqrestore(&floppy_hlt_lock
, flags
);
1098 static void setup_DMA(void)
1102 #ifdef FLOPPY_SANITY_CHECK
1103 if (raw_cmd
->length
== 0) {
1106 printk("zero dma transfer size:");
1107 for (i
= 0; i
< raw_cmd
->cmd_count
; i
++)
1108 printk("%x,", raw_cmd
->cmd
[i
]);
1114 if (((unsigned long)raw_cmd
->kernel_data
) % 512) {
1115 printk("non aligned address: %p\n", raw_cmd
->kernel_data
);
1121 f
= claim_dma_lock();
1124 if (fd_dma_setup(raw_cmd
->kernel_data
, raw_cmd
->length
,
1125 (raw_cmd
->flags
& FD_RAW_READ
) ?
1126 DMA_MODE_READ
: DMA_MODE_WRITE
, FDCS
->address
) < 0) {
1127 release_dma_lock(f
);
1132 release_dma_lock(f
);
1135 fd_cacheflush(raw_cmd
->kernel_data
, raw_cmd
->length
);
1136 fd_set_dma_mode((raw_cmd
->flags
& FD_RAW_READ
) ?
1137 DMA_MODE_READ
: DMA_MODE_WRITE
);
1138 fd_set_dma_addr(raw_cmd
->kernel_data
);
1139 fd_set_dma_count(raw_cmd
->length
);
1140 virtual_dma_port
= FDCS
->address
;
1142 release_dma_lock(f
);
1144 floppy_disable_hlt();
1147 static void show_floppy(void);
1149 /* waits until the fdc becomes ready */
1150 static int wait_til_ready(void)
1157 for (counter
= 0; counter
< 10000; counter
++) {
1158 status
= fd_inb(FD_STATUS
);
1159 if (status
& STATUS_READY
)
1162 if (!initialising
) {
1163 DPRINT("Getstatus times out (%x) on fdc %d\n", status
, fdc
);
1170 /* sends a command byte to the fdc */
1171 static int output_byte(char byte
)
1175 if ((status
= wait_til_ready()) < 0)
1177 if ((status
& (STATUS_READY
| STATUS_DIR
| STATUS_DMA
)) == STATUS_READY
) {
1178 fd_outb(byte
, FD_DATA
);
1179 #ifdef FLOPPY_SANITY_CHECK
1180 output_log
[output_log_pos
].data
= byte
;
1181 output_log
[output_log_pos
].status
= status
;
1182 output_log
[output_log_pos
].jiffies
= jiffies
;
1183 output_log_pos
= (output_log_pos
+ 1) % OLOGSIZE
;
1188 if (!initialising
) {
1189 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
1196 #define LAST_OUT(x) if (output_byte(x)<0){ reset_fdc();return;}
1198 /* gets the response from the fdc */
1199 static int result(void)
1204 for (i
= 0; i
< MAX_REPLIES
; i
++) {
1205 if ((status
= wait_til_ready()) < 0)
1207 status
&= STATUS_DIR
| STATUS_READY
| STATUS_BUSY
| STATUS_DMA
;
1208 if ((status
& ~STATUS_BUSY
) == STATUS_READY
) {
1209 #ifdef FLOPPY_SANITY_CHECK
1210 resultjiffies
= jiffies
;
1215 if (status
== (STATUS_DIR
| STATUS_READY
| STATUS_BUSY
))
1216 reply_buffer
[i
] = fd_inb(FD_DATA
);
1220 if (!initialising
) {
1222 ("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
1230 #define MORE_OUTPUT -2
1231 /* does the fdc need more output? */
1232 static int need_more_output(void)
1236 if ((status
= wait_til_ready()) < 0)
1238 if ((status
& (STATUS_READY
| STATUS_DIR
| STATUS_DMA
)) == STATUS_READY
)
1243 /* Set perpendicular mode as required, based on data rate, if supported.
1244 * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1246 static inline void perpendicular_mode(void)
1248 unsigned char perp_mode
;
1250 if (raw_cmd
->rate
& 0x40) {
1251 switch (raw_cmd
->rate
& 3) {
1259 DPRINT("Invalid data rate for perpendicular mode!\n");
1261 FDCS
->reset
= 1; /* convenient way to return to
1262 * redo without to much hassle (deep
1269 if (FDCS
->perp_mode
== perp_mode
)
1271 if (FDCS
->version
>= FDC_82077_ORIG
) {
1272 output_byte(FD_PERPENDICULAR
);
1273 output_byte(perp_mode
);
1274 FDCS
->perp_mode
= perp_mode
;
1275 } else if (perp_mode
) {
1276 DPRINT("perpendicular mode not supported by this FDC.\n");
1278 } /* perpendicular_mode */
1280 static int fifo_depth
= 0xa;
1283 static int fdc_configure(void)
1286 output_byte(FD_CONFIGURE
);
1287 if (need_more_output() != MORE_OUTPUT
)
1290 output_byte(0x10 | (no_fifo
& 0x20) | (fifo_depth
& 0xf));
1291 output_byte(0); /* pre-compensation from track
1296 #define NOMINAL_DTR 500
1298 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1299 * head load time, and DMA disable flag to values needed by floppy.
1301 * The value "dtr" is the data transfer rate in Kbps. It is needed
1302 * to account for the data rate-based scaling done by the 82072 and 82077
1303 * FDC types. This parameter is ignored for other types of FDCs (i.e.
1306 * Note that changing the data transfer rate has a (probably deleterious)
1307 * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1308 * fdc_specify is called again after each data transfer rate
1311 * srt: 1000 to 16000 in microseconds
1312 * hut: 16 to 240 milliseconds
1313 * hlt: 2 to 254 milliseconds
1315 * These values are rounded up to the next highest available delay time.
1317 static void fdc_specify(void)
1319 unsigned char spec1
;
1320 unsigned char spec2
;
1324 unsigned long dtr
= NOMINAL_DTR
;
1325 unsigned long scale_dtr
= NOMINAL_DTR
;
1326 int hlt_max_code
= 0x7f;
1327 int hut_max_code
= 0xf;
1329 if (FDCS
->need_configure
&& FDCS
->version
>= FDC_82072A
) {
1331 FDCS
->need_configure
= 0;
1334 switch (raw_cmd
->rate
& 0x03) {
1340 if (FDCS
->version
>= FDC_82078
) {
1341 /* chose the default rate table, not the one
1342 * where 1 = 2 Mbps */
1343 output_byte(FD_DRIVESPEC
);
1344 if (need_more_output() == MORE_OUTPUT
) {
1345 output_byte(UNIT(current_drive
));
1355 if (FDCS
->version
>= FDC_82072
) {
1357 hlt_max_code
= 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1358 hut_max_code
= 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1361 /* Convert step rate from microseconds to milliseconds and 4 bits */
1362 srt
= 16 - (DP
->srt
* scale_dtr
/ 1000 + NOMINAL_DTR
- 1) / NOMINAL_DTR
;
1369 hlt
= (DP
->hlt
* scale_dtr
/ 2 + NOMINAL_DTR
- 1) / NOMINAL_DTR
;
1372 else if (hlt
> 0x7f)
1375 hut
= (DP
->hut
* scale_dtr
/ 16 + NOMINAL_DTR
- 1) / NOMINAL_DTR
;
1381 spec1
= (srt
<< 4) | hut
;
1382 spec2
= (hlt
<< 1) | (use_virtual_dma
& 1);
1384 /* If these parameters did not change, just return with success */
1385 if (FDCS
->spec1
!= spec1
|| FDCS
->spec2
!= spec2
) {
1386 /* Go ahead and set spec1 and spec2 */
1387 output_byte(FD_SPECIFY
);
1388 output_byte(FDCS
->spec1
= spec1
);
1389 output_byte(FDCS
->spec2
= spec2
);
1393 /* Set the FDC's data transfer rate on behalf of the specified drive.
1394 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1395 * of the specify command (i.e. using the fdc_specify function).
1397 static int fdc_dtr(void)
1399 /* If data rate not already set to desired value, set it. */
1400 if ((raw_cmd
->rate
& 3) == FDCS
->dtr
)
1404 fd_outb(raw_cmd
->rate
& 3, FD_DCR
);
1406 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1407 * need a stabilization period of several milliseconds to be
1408 * enforced after data rate changes before R/W operations.
1409 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1411 FDCS
->dtr
= raw_cmd
->rate
& 3;
1412 return (fd_wait_for_completion(jiffies
+ 2UL * HZ
/ 100,
1413 (timeout_fn
) floppy_ready
));
1416 static void tell_sector(void)
1418 printk(": track %d, head %d, sector %d, size %d",
1419 R_TRACK
, R_HEAD
, R_SECTOR
, R_SIZECODE
);
1423 * OK, this error interpreting routine is called after a
1424 * DMA read/write has succeeded
1425 * or failed, so we check the results, and copy any buffers.
1426 * hhb: Added better error reporting.
1427 * ak: Made this into a separate routine.
1429 static int interpret_errors(void)
1434 DPRINT("-- FDC reply error");
1439 /* check IC to find cause of interrupt */
1440 switch (ST0
& ST0_INTR
) {
1441 case 0x40: /* error occurred during command execution */
1443 return 0; /* occurs with pseudo-DMA */
1446 DPRINT("Drive is write protected\n");
1447 CLEARF(FD_DISK_WRITABLE
);
1450 } else if (ST1
& ST1_ND
) {
1451 SETF(FD_NEED_TWADDLE
);
1452 } else if (ST1
& ST1_OR
) {
1453 if (DP
->flags
& FTD_MSG
)
1454 DPRINT("Over/Underrun - retrying\n");
1456 } else if (*errors
>= DP
->max_errors
.reporting
) {
1458 if (ST0
& ST0_ECE
) {
1459 printk("Recalibrate failed!");
1460 } else if (ST2
& ST2_CRC
) {
1461 printk("data CRC error");
1463 } else if (ST1
& ST1_CRC
) {
1464 printk("CRC error");
1466 } else if ((ST1
& (ST1_MAM
| ST1_ND
))
1467 || (ST2
& ST2_MAM
)) {
1469 printk("sector not found");
1472 printk("probe failed...");
1473 } else if (ST2
& ST2_WC
) { /* seek error */
1474 printk("wrong cylinder");
1475 } else if (ST2
& ST2_BC
) { /* cylinder marked as bad */
1476 printk("bad cylinder");
1479 ("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
1485 if (ST2
& ST2_WC
|| ST2
& ST2_BC
)
1486 /* wrong cylinder => recal */
1487 DRS
->track
= NEED_2_RECAL
;
1489 case 0x80: /* invalid command given */
1490 DPRINT("Invalid FDC command given!\n");
1494 DPRINT("Abnormal termination caused by polling\n");
1497 default: /* (0) Normal command termination */
1503 * This routine is called when everything should be correctly set up
1504 * for the transfer (i.e. floppy motor is on, the correct floppy is
1505 * selected, and the head is sitting on the right track).
1507 static void setup_rw_floppy(void)
1513 unsigned long ready_date
;
1514 timeout_fn function
;
1516 flags
= raw_cmd
->flags
;
1517 if (flags
& (FD_RAW_READ
| FD_RAW_WRITE
))
1518 flags
|= FD_RAW_INTR
;
1520 if ((flags
& FD_RAW_SPIN
) && !(flags
& FD_RAW_NO_MOTOR
)) {
1521 ready_date
= DRS
->spinup_date
+ DP
->spinup
;
1522 /* If spinup will take a long time, rerun scandrives
1523 * again just before spinup completion. Beware that
1524 * after scandrives, we must again wait for selection.
1526 if (time_after(ready_date
, jiffies
+ DP
->select_delay
)) {
1527 ready_date
-= DP
->select_delay
;
1528 function
= (timeout_fn
) floppy_start
;
1530 function
= (timeout_fn
) setup_rw_floppy
;
1532 /* wait until the floppy is spinning fast enough */
1533 if (fd_wait_for_completion(ready_date
, function
))
1536 dflags
= DRS
->flags
;
1538 if ((flags
& FD_RAW_READ
) || (flags
& FD_RAW_WRITE
))
1541 if (flags
& FD_RAW_INTR
)
1542 do_floppy
= main_command_interrupt
;
1545 for (i
= 0; i
< raw_cmd
->cmd_count
; i
++)
1546 r
|= output_byte(raw_cmd
->cmd
[i
]);
1548 debugt("rw_command: ");
1556 if (!(flags
& FD_RAW_INTR
)) {
1559 } else if (flags
& FD_RAW_NEED_DISK
)
1563 static int blind_seek
;
1566 * This is the routine called after every seek (or recalibrate) interrupt
1567 * from the floppy controller.
1569 static void seek_interrupt(void)
1571 debugt("seek interrupt:");
1572 if (inr
!= 2 || (ST0
& 0xF8) != 0x20) {
1573 DPRINT("seek failed\n");
1574 DRS
->track
= NEED_2_RECAL
;
1579 if (DRS
->track
>= 0 && DRS
->track
!= ST1
&& !blind_seek
) {
1581 if (DP
->flags
& FD_DEBUG
) {
1583 ("clearing NEWCHANGE flag because of effective seek\n");
1584 DPRINT("jiffies=%lu\n", jiffies
);
1587 CLEARF(FD_DISK_NEWCHANGE
); /* effective seek */
1588 DRS
->select_date
= jiffies
;
1594 static void check_wp(void)
1596 if (TESTF(FD_VERIFY
)) {
1597 /* check write protection */
1598 output_byte(FD_GETSTATUS
);
1599 output_byte(UNIT(current_drive
));
1600 if (result() != 1) {
1605 CLEARF(FD_NEED_TWADDLE
);
1607 if (DP
->flags
& FD_DEBUG
) {
1608 DPRINT("checking whether disk is write protected\n");
1609 DPRINT("wp=%x\n", ST3
& 0x40);
1613 SETF(FD_DISK_WRITABLE
);
1615 CLEARF(FD_DISK_WRITABLE
);
1619 static void seek_floppy(void)
1626 if (DP
->flags
& FD_DEBUG
) {
1627 DPRINT("calling disk change from seek\n");
1631 if (!TESTF(FD_DISK_NEWCHANGE
) &&
1632 disk_change(current_drive
) && (raw_cmd
->flags
& FD_RAW_NEED_DISK
)) {
1633 /* the media changed flag should be cleared after the seek.
1634 * If it isn't, this means that there is really no disk in
1637 SETF(FD_DISK_CHANGED
);
1642 if (DRS
->track
<= NEED_1_RECAL
) {
1643 recalibrate_floppy();
1645 } else if (TESTF(FD_DISK_NEWCHANGE
) &&
1646 (raw_cmd
->flags
& FD_RAW_NEED_DISK
) &&
1647 (DRS
->track
<= NO_TRACK
|| DRS
->track
== raw_cmd
->track
)) {
1648 /* we seek to clear the media-changed condition. Does anybody
1649 * know a more elegant way, which works on all drives? */
1651 track
= raw_cmd
->track
- 1;
1653 if (DP
->flags
& FD_SILENT_DCL_CLEAR
) {
1654 set_dor(fdc
, ~(0x10 << UNIT(current_drive
)), 0);
1656 raw_cmd
->flags
|= FD_RAW_NEED_SEEK
;
1662 if (raw_cmd
->track
!= DRS
->track
&&
1663 (raw_cmd
->flags
& FD_RAW_NEED_SEEK
))
1664 track
= raw_cmd
->track
;
1671 do_floppy
= seek_interrupt
;
1672 output_byte(FD_SEEK
);
1673 output_byte(UNIT(current_drive
));
1675 debugt("seek command:");
1678 static void recal_interrupt(void)
1680 debugt("recal interrupt:");
1683 else if (ST0
& ST0_ECE
) {
1684 switch (DRS
->track
) {
1686 debugt("recal interrupt need 1 recal:");
1687 /* after a second recalibrate, we still haven't
1688 * reached track 0. Probably no drive. Raise an
1689 * error, as failing immediately might upset
1690 * computers possessed by the Devil :-) */
1695 debugt("recal interrupt need 2 recal:");
1696 /* If we already did a recalibrate,
1697 * and we are not at track 0, this
1698 * means we have moved. (The only way
1699 * not to move at recalibration is to
1700 * be already at track 0.) Clear the
1701 * new change flag */
1703 if (DP
->flags
& FD_DEBUG
) {
1705 ("clearing NEWCHANGE flag because of second recalibrate\n");
1709 CLEARF(FD_DISK_NEWCHANGE
);
1710 DRS
->select_date
= jiffies
;
1713 debugt("recal interrupt default:");
1714 /* Recalibrate moves the head by at
1715 * most 80 steps. If after one
1716 * recalibrate we don't have reached
1717 * track 0, this might mean that we
1718 * started beyond track 80. Try
1720 DRS
->track
= NEED_1_RECAL
;
1728 static void print_result(char *message
, int inr
)
1732 DPRINT("%s ", message
);
1734 for (i
= 0; i
< inr
; i
++)
1735 printk("repl[%d]=%x ", i
, reply_buffer
[i
]);
1739 /* interrupt handler. Note that this can be called externally on the Sparc */
1740 irqreturn_t
floppy_interrupt(int irq
, void *dev_id
)
1744 void (*handler
)(void) = do_floppy
;
1746 lasthandler
= handler
;
1747 interruptjiffies
= jiffies
;
1749 f
= claim_dma_lock();
1751 release_dma_lock(f
);
1753 floppy_enable_hlt();
1755 if (fdc
>= N_FDC
|| FDCS
->address
== -1) {
1756 /* we don't even know which FDC is the culprit */
1757 printk("DOR0=%x\n", fdc_state
[0].dor
);
1758 printk("floppy interrupt on bizarre fdc %d\n", fdc
);
1759 printk("handler=%p\n", handler
);
1760 is_alive("bizarre fdc");
1765 /* We have to clear the reset flag here, because apparently on boxes
1766 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
1767 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
1768 * emission of the SENSEI's.
1769 * It is OK to emit floppy commands because we are in an interrupt
1770 * handler here, and thus we have to fear no interference of other
1774 do_print
= !handler
&& print_unex
&& !initialising
;
1778 print_result("unexpected interrupt", inr
);
1782 output_byte(FD_SENSEI
);
1785 print_result("sensei", inr
);
1787 } while ((ST0
& 0x83) != UNIT(current_drive
) && inr
== 2
1794 schedule_bh(handler
);
1795 is_alive("normal interrupt end");
1797 /* FIXME! Was it really for us? */
1801 static void recalibrate_floppy(void)
1803 debugt("recalibrate floppy:");
1804 do_floppy
= recal_interrupt
;
1805 output_byte(FD_RECALIBRATE
);
1806 LAST_OUT(UNIT(current_drive
));
1810 * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1812 static void reset_interrupt(void)
1814 debugt("reset interrupt:");
1815 result(); /* get the status ready for set_fdc */
1817 printk("reset set in interrupt, calling %p\n", cont
->error
);
1818 cont
->error(); /* a reset just after a reset. BAD! */
1824 * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1825 * or by setting the self clearing bit 7 of STATUS (newer FDCs)
1827 static void reset_fdc(void)
1829 unsigned long flags
;
1831 do_floppy
= reset_interrupt
;
1835 /* Pseudo-DMA may intercept 'reset finished' interrupt. */
1836 /* Irrelevant for systems with true DMA (i386). */
1838 flags
= claim_dma_lock();
1840 release_dma_lock(flags
);
1842 if (FDCS
->version
>= FDC_82072A
)
1843 fd_outb(0x80 | (FDCS
->dtr
& 3), FD_STATUS
);
1845 fd_outb(FDCS
->dor
& ~0x04, FD_DOR
);
1846 udelay(FD_RESET_DELAY
);
1847 fd_outb(FDCS
->dor
, FD_DOR
);
1851 static void show_floppy(void)
1856 printk("floppy driver state\n");
1857 printk("-------------------\n");
1858 printk("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n",
1859 jiffies
, interruptjiffies
, jiffies
- interruptjiffies
,
1862 #ifdef FLOPPY_SANITY_CHECK
1863 printk("timeout_message=%s\n", timeout_message
);
1864 printk("last output bytes:\n");
1865 for (i
= 0; i
< OLOGSIZE
; i
++)
1866 printk("%2x %2x %lu\n",
1867 output_log
[(i
+ output_log_pos
) % OLOGSIZE
].data
,
1868 output_log
[(i
+ output_log_pos
) % OLOGSIZE
].status
,
1869 output_log
[(i
+ output_log_pos
) % OLOGSIZE
].jiffies
);
1870 printk("last result at %lu\n", resultjiffies
);
1871 printk("last redo_fd_request at %lu\n", lastredo
);
1872 for (i
= 0; i
< resultsize
; i
++) {
1873 printk("%2x ", reply_buffer
[i
]);
1878 printk("status=%x\n", fd_inb(FD_STATUS
));
1879 printk("fdc_busy=%lu\n", fdc_busy
);
1881 printk("do_floppy=%p\n", do_floppy
);
1882 if (work_pending(&floppy_work
))
1883 printk("floppy_work.func=%p\n", floppy_work
.func
);
1884 if (timer_pending(&fd_timer
))
1885 printk("fd_timer.function=%p\n", fd_timer
.function
);
1886 if (timer_pending(&fd_timeout
)) {
1887 printk("timer_function=%p\n", fd_timeout
.function
);
1888 printk("expires=%lu\n", fd_timeout
.expires
- jiffies
);
1889 printk("now=%lu\n", jiffies
);
1891 printk("cont=%p\n", cont
);
1892 printk("current_req=%p\n", current_req
);
1893 printk("command_status=%d\n", command_status
);
1897 static void floppy_shutdown(unsigned long data
)
1899 unsigned long flags
;
1905 floppy_enable_hlt();
1907 flags
= claim_dma_lock();
1909 release_dma_lock(flags
);
1911 /* avoid dma going to a random drive after shutdown */
1914 DPRINT("floppy timeout called\n");
1918 cont
->redo(); /* this will recall reset when needed */
1920 printk("no cont in shutdown!\n");
1921 process_fd_request();
1923 is_alive("floppy shutdown");
1926 /* start motor, check media-changed condition and write protection */
1927 static int start_motor(void (*function
)(void))
1933 data
= UNIT(current_drive
);
1934 if (!(raw_cmd
->flags
& FD_RAW_NO_MOTOR
)) {
1935 if (!(FDCS
->dor
& (0x10 << UNIT(current_drive
)))) {
1937 /* no read since this drive is running */
1938 DRS
->first_read_date
= 0;
1939 /* note motor start time if motor is not yet running */
1940 DRS
->spinup_date
= jiffies
;
1941 data
|= (0x10 << UNIT(current_drive
));
1943 } else if (FDCS
->dor
& (0x10 << UNIT(current_drive
)))
1944 mask
&= ~(0x10 << UNIT(current_drive
));
1946 /* starts motor and selects floppy */
1947 del_timer(motor_off_timer
+ current_drive
);
1948 set_dor(fdc
, mask
, data
);
1950 /* wait_for_completion also schedules reset if needed. */
1951 return (fd_wait_for_completion(DRS
->select_date
+ DP
->select_delay
,
1952 (timeout_fn
) function
));
1955 static void floppy_ready(void)
1958 if (start_motor(floppy_ready
))
1964 if (DP
->flags
& FD_DEBUG
) {
1965 DPRINT("calling disk change from floppy_ready\n");
1968 if (!(raw_cmd
->flags
& FD_RAW_NO_MOTOR
) &&
1969 disk_change(current_drive
) && !DP
->select_delay
)
1970 twaddle(); /* this clears the dcl on certain drive/controller
1973 #ifdef fd_chose_dma_mode
1974 if ((raw_cmd
->flags
& FD_RAW_READ
) || (raw_cmd
->flags
& FD_RAW_WRITE
)) {
1975 unsigned long flags
= claim_dma_lock();
1976 fd_chose_dma_mode(raw_cmd
->kernel_data
, raw_cmd
->length
);
1977 release_dma_lock(flags
);
1981 if (raw_cmd
->flags
& (FD_RAW_NEED_SEEK
| FD_RAW_NEED_DISK
)) {
1982 perpendicular_mode();
1983 fdc_specify(); /* must be done here because of hut, hlt ... */
1986 if ((raw_cmd
->flags
& FD_RAW_READ
) ||
1987 (raw_cmd
->flags
& FD_RAW_WRITE
))
1993 static void floppy_start(void)
1995 reschedule_timeout(current_reqD
, "floppy start", 0);
1999 if (DP
->flags
& FD_DEBUG
) {
2000 DPRINT("setting NEWCHANGE in floppy_start\n");
2003 SETF(FD_DISK_NEWCHANGE
);
2008 * ========================================================================
2009 * here ends the bottom half. Exported routines are:
2010 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
2011 * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
2012 * Initialization also uses output_byte, result, set_dor, floppy_interrupt
2014 * ========================================================================
2017 * General purpose continuations.
2018 * ==============================
2021 static void do_wakeup(void)
2023 reschedule_timeout(MAXTIMEOUT
, "do wakeup", 0);
2025 command_status
+= 2;
2026 wake_up(&command_done
);
2029 static struct cont_t wakeup_cont
= {
2033 .done
= (done_f
)empty
2036 static struct cont_t intr_cont
= {
2038 .redo
= process_fd_request
,
2040 .done
= (done_f
)empty
2043 static int wait_til_done(void (*handler
)(void), int interruptible
)
2047 schedule_bh(handler
);
2049 if (command_status
< 2 && NO_SIGNAL
) {
2050 DECLARE_WAITQUEUE(wait
, current
);
2052 add_wait_queue(&command_done
, &wait
);
2054 set_current_state(interruptible
?
2055 TASK_INTERRUPTIBLE
:
2056 TASK_UNINTERRUPTIBLE
);
2058 if (command_status
>= 2 || !NO_SIGNAL
)
2061 is_alive("wait_til_done");
2065 set_current_state(TASK_RUNNING
);
2066 remove_wait_queue(&command_done
, &wait
);
2069 if (command_status
< 2) {
2077 command_status
= FD_COMMAND_ERROR
;
2078 if (command_status
== FD_COMMAND_OKAY
)
2082 command_status
= FD_COMMAND_NONE
;
2086 static void generic_done(int result
)
2088 command_status
= result
;
2089 cont
= &wakeup_cont
;
2092 static void generic_success(void)
2097 static void generic_failure(void)
2102 static void success_and_wakeup(void)
2109 * formatting and rw support.
2110 * ==========================
2113 static int next_valid_format(void)
2117 probed_format
= DRS
->probed_format
;
2119 if (probed_format
>= 8 || !DP
->autodetect
[probed_format
]) {
2120 DRS
->probed_format
= 0;
2123 if (floppy_type
[DP
->autodetect
[probed_format
]].sect
) {
2124 DRS
->probed_format
= probed_format
;
2131 static void bad_flp_intr(void)
2136 DRS
->probed_format
++;
2137 if (!next_valid_format())
2140 err_count
= ++(*errors
);
2141 INFBOUND(DRWE
->badness
, err_count
);
2142 if (err_count
> DP
->max_errors
.abort
)
2144 if (err_count
> DP
->max_errors
.reset
)
2146 else if (err_count
> DP
->max_errors
.recal
)
2147 DRS
->track
= NEED_2_RECAL
;
2150 static void set_floppy(int drive
)
2152 int type
= ITYPE(UDRS
->fd_device
);
2155 _floppy
= floppy_type
+ type
;
2157 _floppy
= current_type
[drive
];
2161 * formatting support.
2162 * ===================
2164 static void format_interrupt(void)
2166 switch (interpret_errors()) {
2177 #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2)
2178 #define FM_MODE(x,y) ((y) & ~(((x)->rate & 0x80) >>1))
2179 #define CT(x) ((x) | 0xc0)
2180 static void setup_format_params(int track
)
2188 unsigned char track
, head
, sect
, size
;
2189 } *here
= (struct fparm
*)floppy_track_buffer
;
2191 raw_cmd
= &default_raw_cmd
;
2192 raw_cmd
->track
= track
;
2194 raw_cmd
->flags
= FD_RAW_WRITE
| FD_RAW_INTR
| FD_RAW_SPIN
|
2195 FD_RAW_NEED_DISK
| FD_RAW_NEED_SEEK
;
2196 raw_cmd
->rate
= _floppy
->rate
& 0x43;
2197 raw_cmd
->cmd_count
= NR_F
;
2198 COMMAND
= FM_MODE(_floppy
, FD_FORMAT
);
2199 DR_SELECT
= UNIT(current_drive
) + PH_HEAD(_floppy
, format_req
.head
);
2200 F_SIZECODE
= FD_SIZECODE(_floppy
);
2201 F_SECT_PER_TRACK
= _floppy
->sect
<< 2 >> F_SIZECODE
;
2202 F_GAP
= _floppy
->fmt_gap
;
2203 F_FILL
= FD_FILL_BYTE
;
2205 raw_cmd
->kernel_data
= floppy_track_buffer
;
2206 raw_cmd
->length
= 4 * F_SECT_PER_TRACK
;
2208 /* allow for about 30ms for data transport per track */
2209 head_shift
= (F_SECT_PER_TRACK
+ 5) / 6;
2211 /* a ``cylinder'' is two tracks plus a little stepping time */
2212 track_shift
= 2 * head_shift
+ 3;
2214 /* position of logical sector 1 on this track */
2215 n
= (track_shift
* format_req
.track
+ head_shift
* format_req
.head
)
2218 /* determine interleave */
2220 if (_floppy
->fmt_gap
< 0x22)
2223 /* initialize field */
2224 for (count
= 0; count
< F_SECT_PER_TRACK
; ++count
) {
2225 here
[count
].track
= format_req
.track
;
2226 here
[count
].head
= format_req
.head
;
2227 here
[count
].sect
= 0;
2228 here
[count
].size
= F_SIZECODE
;
2230 /* place logical sectors */
2231 for (count
= 1; count
<= F_SECT_PER_TRACK
; ++count
) {
2232 here
[n
].sect
= count
;
2233 n
= (n
+ il
) % F_SECT_PER_TRACK
;
2234 if (here
[n
].sect
) { /* sector busy, find next free sector */
2236 if (n
>= F_SECT_PER_TRACK
) {
2237 n
-= F_SECT_PER_TRACK
;
2238 while (here
[n
].sect
)
2243 if (_floppy
->stretch
& FD_ZEROBASED
) {
2244 for (count
= 0; count
< F_SECT_PER_TRACK
; count
++)
2249 static void redo_format(void)
2252 setup_format_params(format_req
.track
<< STRETCH(_floppy
));
2254 debugt("queue format request");
2257 static struct cont_t format_cont
= {
2258 .interrupt
= format_interrupt
,
2259 .redo
= redo_format
,
2260 .error
= bad_flp_intr
,
2261 .done
= generic_done
2264 static int do_format(int drive
, struct format_descr
*tmp_format_req
)
2271 _floppy
->track
> DP
->tracks
||
2272 tmp_format_req
->track
>= _floppy
->track
||
2273 tmp_format_req
->head
>= _floppy
->head
||
2274 (_floppy
->sect
<< 2) % (1 << FD_SIZECODE(_floppy
)) ||
2275 !_floppy
->fmt_gap
) {
2276 process_fd_request();
2279 format_req
= *tmp_format_req
;
2281 cont
= &format_cont
;
2282 errors
= &format_errors
;
2284 process_fd_request();
2289 * Buffer read/write and support
2290 * =============================
2293 static void floppy_end_request(struct request
*req
, int error
)
2295 unsigned int nr_sectors
= current_count_sectors
;
2296 unsigned int drive
= (unsigned long)req
->rq_disk
->private_data
;
2298 /* current_count_sectors can be zero if transfer failed */
2300 nr_sectors
= req
->current_nr_sectors
;
2301 if (__blk_end_request(req
, error
, nr_sectors
<< 9))
2304 /* We're done with the request */
2309 /* new request_done. Can handle physical sectors which are smaller than a
2311 static void request_done(int uptodate
)
2313 struct request_queue
*q
= floppy_queue
;
2314 struct request
*req
= current_req
;
2315 unsigned long flags
;
2319 reschedule_timeout(MAXTIMEOUT
, "request done %d", uptodate
);
2322 printk("floppy.c: no request in request_done\n");
2327 /* maintain values for invalidation on geometry
2329 block
= current_count_sectors
+ req
->sector
;
2330 INFBOUND(DRS
->maxblock
, block
);
2331 if (block
> _floppy
->sect
)
2334 /* unlock chained buffers */
2335 spin_lock_irqsave(q
->queue_lock
, flags
);
2336 floppy_end_request(req
, 0);
2337 spin_unlock_irqrestore(q
->queue_lock
, flags
);
2339 if (rq_data_dir(req
) == WRITE
) {
2340 /* record write error information */
2341 DRWE
->write_errors
++;
2342 if (DRWE
->write_errors
== 1) {
2343 DRWE
->first_error_sector
= req
->sector
;
2344 DRWE
->first_error_generation
= DRS
->generation
;
2346 DRWE
->last_error_sector
= req
->sector
;
2347 DRWE
->last_error_generation
= DRS
->generation
;
2349 spin_lock_irqsave(q
->queue_lock
, flags
);
2350 floppy_end_request(req
, -EIO
);
2351 spin_unlock_irqrestore(q
->queue_lock
, flags
);
2355 /* Interrupt handler evaluating the result of the r/w operation */
2356 static void rw_interrupt(void)
2364 /* some Toshiba floppy controllers occasionnally seem to
2365 * return bogus interrupts after read/write operations, which
2366 * can be recognized by a bad head number (>= 2) */
2370 if (!DRS
->first_read_date
)
2371 DRS
->first_read_date
= jiffies
;
2386 nr_sectors
= (((R_TRACK
- TRACK
) * heads
+
2387 R_HEAD
- HEAD
) * SECT_PER_TRACK
+
2388 R_SECTOR
- SECTOR
+ eoc
) << SIZECODE
>> 2;
2390 #ifdef FLOPPY_SANITY_CHECK
2391 if (nr_sectors
/ ssize
>
2392 (in_sector_offset
+ current_count_sectors
+ ssize
- 1) / ssize
) {
2393 DPRINT("long rw: %x instead of %lx\n",
2394 nr_sectors
, current_count_sectors
);
2395 printk("rs=%d s=%d\n", R_SECTOR
, SECTOR
);
2396 printk("rh=%d h=%d\n", R_HEAD
, HEAD
);
2397 printk("rt=%d t=%d\n", R_TRACK
, TRACK
);
2398 printk("heads=%d eoc=%d\n", heads
, eoc
);
2399 printk("spt=%d st=%d ss=%d\n", SECT_PER_TRACK
,
2401 printk("in_sector_offset=%d\n", in_sector_offset
);
2405 nr_sectors
-= in_sector_offset
;
2406 INFBOUND(nr_sectors
, 0);
2407 SUPBOUND(current_count_sectors
, nr_sectors
);
2409 switch (interpret_errors()) {
2414 if (!current_count_sectors
) {
2421 if (!current_count_sectors
) {
2425 current_type
[current_drive
] = _floppy
;
2426 floppy_sizes
[TOMINOR(current_drive
)] = _floppy
->size
;
2431 if (DP
->flags
& FTD_MSG
)
2432 DPRINT("Auto-detected floppy type %s in fd%d\n",
2433 _floppy
->name
, current_drive
);
2434 current_type
[current_drive
] = _floppy
;
2435 floppy_sizes
[TOMINOR(current_drive
)] = _floppy
->size
;
2439 if (CT(COMMAND
) != FD_READ
||
2440 raw_cmd
->kernel_data
== current_req
->buffer
) {
2441 /* transfer directly from buffer */
2443 } else if (CT(COMMAND
) == FD_READ
) {
2444 buffer_track
= raw_cmd
->track
;
2445 buffer_drive
= current_drive
;
2446 INFBOUND(buffer_max
, nr_sectors
+ fsector_t
);
2451 /* Compute maximal contiguous buffer size. */
2452 static int buffer_chain_size(void)
2456 struct req_iterator iter
;
2459 base
= bio_data(current_req
->bio
);
2462 rq_for_each_segment(bv
, current_req
, iter
) {
2463 if (page_address(bv
->bv_page
) + bv
->bv_offset
!= base
+ size
)
2472 /* Compute the maximal transfer size */
2473 static int transfer_size(int ssize
, int max_sector
, int max_size
)
2475 SUPBOUND(max_sector
, fsector_t
+ max_size
);
2478 max_sector
-= (max_sector
% _floppy
->sect
) % ssize
;
2480 /* transfer size, beginning not aligned */
2481 current_count_sectors
= max_sector
- fsector_t
;
2487 * Move data from/to the track buffer to/from the buffer cache.
2489 static void copy_buffer(int ssize
, int max_sector
, int max_sector_2
)
2491 int remaining
; /* number of transferred 512-byte sectors */
2496 struct req_iterator iter
;
2498 max_sector
= transfer_size(ssize
,
2499 min(max_sector
, max_sector_2
),
2500 current_req
->nr_sectors
);
2502 if (current_count_sectors
<= 0 && CT(COMMAND
) == FD_WRITE
&&
2503 buffer_max
> fsector_t
+ current_req
->nr_sectors
)
2504 current_count_sectors
= min_t(int, buffer_max
- fsector_t
,
2505 current_req
->nr_sectors
);
2507 remaining
= current_count_sectors
<< 9;
2508 #ifdef FLOPPY_SANITY_CHECK
2509 if ((remaining
>> 9) > current_req
->nr_sectors
&&
2510 CT(COMMAND
) == FD_WRITE
) {
2511 DPRINT("in copy buffer\n");
2512 printk("current_count_sectors=%ld\n", current_count_sectors
);
2513 printk("remaining=%d\n", remaining
>> 9);
2514 printk("current_req->nr_sectors=%ld\n",
2515 current_req
->nr_sectors
);
2516 printk("current_req->current_nr_sectors=%u\n",
2517 current_req
->current_nr_sectors
);
2518 printk("max_sector=%d\n", max_sector
);
2519 printk("ssize=%d\n", ssize
);
2523 buffer_max
= max(max_sector
, buffer_max
);
2525 dma_buffer
= floppy_track_buffer
+ ((fsector_t
- buffer_min
) << 9);
2527 size
= current_req
->current_nr_sectors
<< 9;
2529 rq_for_each_segment(bv
, current_req
, iter
) {
2534 SUPBOUND(size
, remaining
);
2536 buffer
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2537 #ifdef FLOPPY_SANITY_CHECK
2538 if (dma_buffer
+ size
>
2539 floppy_track_buffer
+ (max_buffer_sectors
<< 10) ||
2540 dma_buffer
< floppy_track_buffer
) {
2541 DPRINT("buffer overrun in copy buffer %d\n",
2542 (int)((floppy_track_buffer
-
2544 printk("fsector_t=%d buffer_min=%d\n",
2545 fsector_t
, buffer_min
);
2546 printk("current_count_sectors=%ld\n",
2547 current_count_sectors
);
2548 if (CT(COMMAND
) == FD_READ
)
2550 if (CT(COMMAND
) == FD_WRITE
)
2554 if (((unsigned long)buffer
) % 512)
2555 DPRINT("%p buffer not aligned\n", buffer
);
2557 if (CT(COMMAND
) == FD_READ
)
2558 memcpy(buffer
, dma_buffer
, size
);
2560 memcpy(dma_buffer
, buffer
, size
);
2565 #ifdef FLOPPY_SANITY_CHECK
2568 max_sector
-= remaining
>> 9;
2569 DPRINT("weirdness: remaining %d\n", remaining
>> 9);
2574 /* work around a bug in pseudo DMA
2575 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2576 * sending data. Hence we need a different way to signal the
2577 * transfer length: We use SECT_PER_TRACK. Unfortunately, this
2578 * does not work with MT, hence we can only transfer one head at
2581 static void virtualdmabug_workaround(void)
2586 if (CT(COMMAND
) == FD_WRITE
) {
2587 COMMAND
&= ~0x80; /* switch off multiple track mode */
2589 hard_sectors
= raw_cmd
->length
>> (7 + SIZECODE
);
2590 end_sector
= SECTOR
+ hard_sectors
- 1;
2591 #ifdef FLOPPY_SANITY_CHECK
2592 if (end_sector
> SECT_PER_TRACK
) {
2593 printk("too many sectors %d > %d\n",
2594 end_sector
, SECT_PER_TRACK
);
2598 SECT_PER_TRACK
= end_sector
; /* make sure SECT_PER_TRACK points
2599 * to end of transfer */
2604 * Formulate a read/write request.
2605 * this routine decides where to load the data (directly to buffer, or to
2606 * tmp floppy area), how much data to load (the size of the buffer, the whole
2607 * track, or a single sector)
2608 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2609 * allocation on the fly, it should be done here. No other part should need
2613 static int make_raw_rw_request(void)
2615 int aligned_sector_t
;
2621 if (max_buffer_sectors
== 0) {
2622 printk("VFS: Block I/O scheduled on unopened device\n");
2626 set_fdc((long)current_req
->rq_disk
->private_data
);
2628 raw_cmd
= &default_raw_cmd
;
2629 raw_cmd
->flags
= FD_RAW_SPIN
| FD_RAW_NEED_DISK
| FD_RAW_NEED_DISK
|
2631 raw_cmd
->cmd_count
= NR_RW
;
2632 if (rq_data_dir(current_req
) == READ
) {
2633 raw_cmd
->flags
|= FD_RAW_READ
;
2634 COMMAND
= FM_MODE(_floppy
, FD_READ
);
2635 } else if (rq_data_dir(current_req
) == WRITE
) {
2636 raw_cmd
->flags
|= FD_RAW_WRITE
;
2637 COMMAND
= FM_MODE(_floppy
, FD_WRITE
);
2639 DPRINT("make_raw_rw_request: unknown command\n");
2643 max_sector
= _floppy
->sect
* _floppy
->head
;
2645 TRACK
= (int)current_req
->sector
/ max_sector
;
2646 fsector_t
= (int)current_req
->sector
% max_sector
;
2647 if (_floppy
->track
&& TRACK
>= _floppy
->track
) {
2648 if (current_req
->current_nr_sectors
& 1) {
2649 current_count_sectors
= 1;
2654 HEAD
= fsector_t
/ _floppy
->sect
;
2656 if (((_floppy
->stretch
& (FD_SWAPSIDES
| FD_ZEROBASED
)) ||
2657 TESTF(FD_NEED_TWADDLE
)) && fsector_t
< _floppy
->sect
)
2658 max_sector
= _floppy
->sect
;
2660 /* 2M disks have phantom sectors on the first track */
2661 if ((_floppy
->rate
& FD_2M
) && (!TRACK
) && (!HEAD
)) {
2662 max_sector
= 2 * _floppy
->sect
/ 3;
2663 if (fsector_t
>= max_sector
) {
2664 current_count_sectors
=
2665 min_t(int, _floppy
->sect
- fsector_t
,
2666 current_req
->nr_sectors
);
2671 SIZECODE
= FD_SIZECODE(_floppy
);
2672 raw_cmd
->rate
= _floppy
->rate
& 0x43;
2673 if ((_floppy
->rate
& FD_2M
) && (TRACK
|| HEAD
) && raw_cmd
->rate
== 2)
2680 raw_cmd
->track
= TRACK
<< STRETCH(_floppy
);
2681 DR_SELECT
= UNIT(current_drive
) + PH_HEAD(_floppy
, HEAD
);
2684 SECT_PER_TRACK
= _floppy
->sect
<< 2 >> SIZECODE
;
2685 SECTOR
= ((fsector_t
% _floppy
->sect
) << 2 >> SIZECODE
) +
2686 ((_floppy
->stretch
& FD_ZEROBASED
) ? 0 : 1);
2688 /* tracksize describes the size which can be filled up with sectors
2691 tracksize
= _floppy
->sect
- _floppy
->sect
% ssize
;
2692 if (tracksize
< _floppy
->sect
) {
2694 if (tracksize
<= fsector_t
% _floppy
->sect
)
2697 /* if we are beyond tracksize, fill up using smaller sectors */
2698 while (tracksize
<= fsector_t
% _floppy
->sect
) {
2699 while (tracksize
+ ssize
> _floppy
->sect
) {
2707 max_sector
= HEAD
* _floppy
->sect
+ tracksize
;
2708 } else if (!TRACK
&& !HEAD
&& !(_floppy
->rate
& FD_2M
) && probing
) {
2709 max_sector
= _floppy
->sect
;
2710 } else if (!HEAD
&& CT(COMMAND
) == FD_WRITE
) {
2711 /* for virtual DMA bug workaround */
2712 max_sector
= _floppy
->sect
;
2715 in_sector_offset
= (fsector_t
% _floppy
->sect
) % ssize
;
2716 aligned_sector_t
= fsector_t
- in_sector_offset
;
2717 max_size
= current_req
->nr_sectors
;
2718 if ((raw_cmd
->track
== buffer_track
) &&
2719 (current_drive
== buffer_drive
) &&
2720 (fsector_t
>= buffer_min
) && (fsector_t
< buffer_max
)) {
2721 /* data already in track buffer */
2722 if (CT(COMMAND
) == FD_READ
) {
2723 copy_buffer(1, max_sector
, buffer_max
);
2726 } else if (in_sector_offset
|| current_req
->nr_sectors
< ssize
) {
2727 if (CT(COMMAND
) == FD_WRITE
) {
2728 if (fsector_t
+ current_req
->nr_sectors
> ssize
&&
2729 fsector_t
+ current_req
->nr_sectors
< ssize
+ ssize
)
2730 max_size
= ssize
+ ssize
;
2734 raw_cmd
->flags
&= ~FD_RAW_WRITE
;
2735 raw_cmd
->flags
|= FD_RAW_READ
;
2736 COMMAND
= FM_MODE(_floppy
, FD_READ
);
2737 } else if ((unsigned long)current_req
->buffer
< MAX_DMA_ADDRESS
) {
2738 unsigned long dma_limit
;
2739 int direct
, indirect
;
2742 transfer_size(ssize
, max_sector
,
2743 max_buffer_sectors
* 2) - fsector_t
;
2746 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2747 * on a 64 bit machine!
2749 max_size
= buffer_chain_size();
2752 ((unsigned long)current_req
->buffer
)) >> 9;
2753 if ((unsigned long)max_size
> dma_limit
) {
2754 max_size
= dma_limit
;
2756 /* 64 kb boundaries */
2757 if (CROSS_64KB(current_req
->buffer
, max_size
<< 9))
2759 ((unsigned long)current_req
->buffer
) %
2761 direct
= transfer_size(ssize
, max_sector
, max_size
) - fsector_t
;
2763 * We try to read tracks, but if we get too many errors, we
2764 * go back to reading just one sector at a time.
2766 * This means we should be able to read a sector even if there
2767 * are other bad sectors on this track.
2770 (indirect
* 2 > direct
* 3 &&
2771 *errors
< DP
->max_errors
.read_track
&& ((!probing
2772 || (DP
->read_track
& (1 << DRS
->probed_format
)))))) {
2773 max_size
= current_req
->nr_sectors
;
2775 raw_cmd
->kernel_data
= current_req
->buffer
;
2776 raw_cmd
->length
= current_count_sectors
<< 9;
2777 if (raw_cmd
->length
== 0) {
2779 ("zero dma transfer attempted from make_raw_request\n");
2780 DPRINT("indirect=%d direct=%d fsector_t=%d",
2781 indirect
, direct
, fsector_t
);
2784 virtualdmabug_workaround();
2789 if (CT(COMMAND
) == FD_READ
)
2790 max_size
= max_sector
; /* unbounded */
2792 /* claim buffer track if needed */
2793 if (buffer_track
!= raw_cmd
->track
|| /* bad track */
2794 buffer_drive
!= current_drive
|| /* bad drive */
2795 fsector_t
> buffer_max
||
2796 fsector_t
< buffer_min
||
2797 ((CT(COMMAND
) == FD_READ
||
2798 (!in_sector_offset
&& current_req
->nr_sectors
>= ssize
)) &&
2799 max_sector
> 2 * max_buffer_sectors
+ buffer_min
&&
2800 max_size
+ fsector_t
> 2 * max_buffer_sectors
+ buffer_min
)
2801 /* not enough space */
2804 buffer_drive
= current_drive
;
2805 buffer_max
= buffer_min
= aligned_sector_t
;
2807 raw_cmd
->kernel_data
= floppy_track_buffer
+
2808 ((aligned_sector_t
- buffer_min
) << 9);
2810 if (CT(COMMAND
) == FD_WRITE
) {
2811 /* copy write buffer to track buffer.
2812 * if we get here, we know that the write
2813 * is either aligned or the data already in the buffer
2814 * (buffer will be overwritten) */
2815 #ifdef FLOPPY_SANITY_CHECK
2816 if (in_sector_offset
&& buffer_track
== -1)
2817 DPRINT("internal error offset !=0 on write\n");
2819 buffer_track
= raw_cmd
->track
;
2820 buffer_drive
= current_drive
;
2821 copy_buffer(ssize
, max_sector
,
2822 2 * max_buffer_sectors
+ buffer_min
);
2824 transfer_size(ssize
, max_sector
,
2825 2 * max_buffer_sectors
+ buffer_min
-
2828 /* round up current_count_sectors to get dma xfer size */
2829 raw_cmd
->length
= in_sector_offset
+ current_count_sectors
;
2830 raw_cmd
->length
= ((raw_cmd
->length
- 1) | (ssize
- 1)) + 1;
2831 raw_cmd
->length
<<= 9;
2832 #ifdef FLOPPY_SANITY_CHECK
2833 if ((raw_cmd
->length
< current_count_sectors
<< 9) ||
2834 (raw_cmd
->kernel_data
!= current_req
->buffer
&&
2835 CT(COMMAND
) == FD_WRITE
&&
2836 (aligned_sector_t
+ (raw_cmd
->length
>> 9) > buffer_max
||
2837 aligned_sector_t
< buffer_min
)) ||
2838 raw_cmd
->length
% (128 << SIZECODE
) ||
2839 raw_cmd
->length
<= 0 || current_count_sectors
<= 0) {
2840 DPRINT("fractionary current count b=%lx s=%lx\n",
2841 raw_cmd
->length
, current_count_sectors
);
2842 if (raw_cmd
->kernel_data
!= current_req
->buffer
)
2843 printk("addr=%d, length=%ld\n",
2844 (int)((raw_cmd
->kernel_data
-
2845 floppy_track_buffer
) >> 9),
2846 current_count_sectors
);
2847 printk("st=%d ast=%d mse=%d msi=%d\n",
2848 fsector_t
, aligned_sector_t
, max_sector
, max_size
);
2849 printk("ssize=%x SIZECODE=%d\n", ssize
, SIZECODE
);
2850 printk("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2851 COMMAND
, SECTOR
, HEAD
, TRACK
);
2852 printk("buffer drive=%d\n", buffer_drive
);
2853 printk("buffer track=%d\n", buffer_track
);
2854 printk("buffer_min=%d\n", buffer_min
);
2855 printk("buffer_max=%d\n", buffer_max
);
2859 if (raw_cmd
->kernel_data
!= current_req
->buffer
) {
2860 if (raw_cmd
->kernel_data
< floppy_track_buffer
||
2861 current_count_sectors
< 0 ||
2862 raw_cmd
->length
< 0 ||
2863 raw_cmd
->kernel_data
+ raw_cmd
->length
>
2864 floppy_track_buffer
+ (max_buffer_sectors
<< 10)) {
2865 DPRINT("buffer overrun in schedule dma\n");
2866 printk("fsector_t=%d buffer_min=%d current_count=%ld\n",
2867 fsector_t
, buffer_min
, raw_cmd
->length
>> 9);
2868 printk("current_count_sectors=%ld\n",
2869 current_count_sectors
);
2870 if (CT(COMMAND
) == FD_READ
)
2872 if (CT(COMMAND
) == FD_WRITE
)
2876 } else if (raw_cmd
->length
> current_req
->nr_sectors
<< 9 ||
2877 current_count_sectors
> current_req
->nr_sectors
) {
2878 DPRINT("buffer overrun in direct transfer\n");
2880 } else if (raw_cmd
->length
< current_count_sectors
<< 9) {
2881 DPRINT("more sectors than bytes\n");
2882 printk("bytes=%ld\n", raw_cmd
->length
>> 9);
2883 printk("sectors=%ld\n", current_count_sectors
);
2885 if (raw_cmd
->length
== 0) {
2886 DPRINT("zero dma transfer attempted from make_raw_request\n");
2891 virtualdmabug_workaround();
2895 static void redo_fd_request(void)
2897 #define REPEAT {request_done(0); continue; }
2902 if (current_drive
< N_DRIVE
)
2903 floppy_off(current_drive
);
2907 struct request
*req
;
2909 spin_lock_irq(floppy_queue
->queue_lock
);
2910 req
= elv_next_request(floppy_queue
);
2911 spin_unlock_irq(floppy_queue
->queue_lock
);
2919 drive
= (long)current_req
->rq_disk
->private_data
;
2921 reschedule_timeout(current_reqD
, "redo fd request", 0);
2924 raw_cmd
= &default_raw_cmd
;
2926 if (start_motor(redo_fd_request
))
2928 disk_change(current_drive
);
2929 if (test_bit(current_drive
, &fake_change
) ||
2930 TESTF(FD_DISK_CHANGED
)) {
2931 DPRINT("disk absent or changed during operation\n");
2934 if (!_floppy
) { /* Autodetection */
2936 DRS
->probed_format
= 0;
2937 if (next_valid_format()) {
2938 DPRINT("no autodetectable formats\n");
2945 floppy_type
+ DP
->autodetect
[DRS
->probed_format
];
2948 errors
= &(current_req
->errors
);
2949 tmp
= make_raw_rw_request();
2955 if (TESTF(FD_NEED_TWADDLE
))
2957 schedule_bh(floppy_start
);
2958 debugt("queue fd request");
2964 static struct cont_t rw_cont
= {
2965 .interrupt
= rw_interrupt
,
2966 .redo
= redo_fd_request
,
2967 .error
= bad_flp_intr
,
2968 .done
= request_done
2971 static void process_fd_request(void)
2974 schedule_bh(redo_fd_request
);
2977 static void do_fd_request(struct request_queue
* q
)
2979 if (max_buffer_sectors
== 0) {
2980 printk("VFS: do_fd_request called on non-open device\n");
2984 if (usage_count
== 0) {
2985 printk("warning: usage count=0, current_req=%p exiting\n",
2987 printk("sect=%ld type=%x flags=%x\n", (long)current_req
->sector
,
2988 current_req
->cmd_type
, current_req
->cmd_flags
);
2991 if (test_bit(0, &fdc_busy
)) {
2992 /* fdc busy, this new request will be treated when the
2993 current one is done */
2994 is_alive("do fd request, old request running");
2997 lock_fdc(MAXTIMEOUT
, 0);
2998 process_fd_request();
2999 is_alive("do fd request");
3002 static struct cont_t poll_cont
= {
3003 .interrupt
= success_and_wakeup
,
3004 .redo
= floppy_ready
,
3005 .error
= generic_failure
,
3006 .done
= generic_done
3009 static int poll_drive(int interruptible
, int flag
)
3013 /* no auto-sense, just clear dcl */
3014 raw_cmd
= &default_raw_cmd
;
3015 raw_cmd
->flags
= flag
;
3017 raw_cmd
->cmd_count
= 0;
3020 if (DP
->flags
& FD_DEBUG
) {
3021 DPRINT("setting NEWCHANGE in poll_drive\n");
3024 SETF(FD_DISK_NEWCHANGE
);
3030 * User triggered reset
3031 * ====================
3034 static void reset_intr(void)
3036 printk("weird, reset interrupt called\n");
3039 static struct cont_t reset_cont
= {
3040 .interrupt
= reset_intr
,
3041 .redo
= success_and_wakeup
,
3042 .error
= generic_failure
,
3043 .done
= generic_done
3046 static int user_reset_fdc(int drive
, int arg
, int interruptible
)
3051 LOCK_FDC(drive
, interruptible
);
3052 if (arg
== FD_RESET_ALWAYS
)
3058 process_fd_request();
3063 * Misc Ioctl's and support
3064 * ========================
3066 static inline int fd_copyout(void __user
*param
, const void *address
,
3069 return copy_to_user(param
, address
, size
) ? -EFAULT
: 0;
3072 static inline int fd_copyin(void __user
*param
, void *address
, unsigned long size
)
3074 return copy_from_user(address
, param
, size
) ? -EFAULT
: 0;
3077 #define _COPYOUT(x) (copy_to_user((void __user *)param, &(x), sizeof(x)) ? -EFAULT : 0)
3078 #define _COPYIN(x) (copy_from_user(&(x), (void __user *)param, sizeof(x)) ? -EFAULT : 0)
3080 #define COPYOUT(x) ECALL(_COPYOUT(x))
3081 #define COPYIN(x) ECALL(_COPYIN(x))
3083 static inline const char *drive_name(int type
, int drive
)
3085 struct floppy_struct
*floppy
;
3088 floppy
= floppy_type
+ type
;
3090 if (UDP
->native_format
)
3091 floppy
= floppy_type
+ UDP
->native_format
;
3096 return floppy
->name
;
3102 static void raw_cmd_done(int flag
)
3107 raw_cmd
->flags
|= FD_RAW_FAILURE
;
3108 raw_cmd
->flags
|= FD_RAW_HARDFAILURE
;
3110 raw_cmd
->reply_count
= inr
;
3111 if (raw_cmd
->reply_count
> MAX_REPLIES
)
3112 raw_cmd
->reply_count
= 0;
3113 for (i
= 0; i
< raw_cmd
->reply_count
; i
++)
3114 raw_cmd
->reply
[i
] = reply_buffer
[i
];
3116 if (raw_cmd
->flags
& (FD_RAW_READ
| FD_RAW_WRITE
)) {
3117 unsigned long flags
;
3118 flags
= claim_dma_lock();
3119 raw_cmd
->length
= fd_get_dma_residue();
3120 release_dma_lock(flags
);
3123 if ((raw_cmd
->flags
& FD_RAW_SOFTFAILURE
) &&
3124 (!raw_cmd
->reply_count
|| (raw_cmd
->reply
[0] & 0xc0)))
3125 raw_cmd
->flags
|= FD_RAW_FAILURE
;
3127 if (disk_change(current_drive
))
3128 raw_cmd
->flags
|= FD_RAW_DISK_CHANGE
;
3130 raw_cmd
->flags
&= ~FD_RAW_DISK_CHANGE
;
3131 if (raw_cmd
->flags
& FD_RAW_NO_MOTOR_AFTER
)
3132 motor_off_callback(current_drive
);
3134 if (raw_cmd
->next
&&
3135 (!(raw_cmd
->flags
& FD_RAW_FAILURE
) ||
3136 !(raw_cmd
->flags
& FD_RAW_STOP_IF_FAILURE
)) &&
3137 ((raw_cmd
->flags
& FD_RAW_FAILURE
) ||
3138 !(raw_cmd
->flags
& FD_RAW_STOP_IF_SUCCESS
))) {
3139 raw_cmd
= raw_cmd
->next
;
3146 static struct cont_t raw_cmd_cont
= {
3147 .interrupt
= success_and_wakeup
,
3148 .redo
= floppy_start
,
3149 .error
= generic_failure
,
3150 .done
= raw_cmd_done
3153 static inline int raw_cmd_copyout(int cmd
, char __user
*param
,
3154 struct floppy_raw_cmd
*ptr
)
3160 param
+= sizeof(struct floppy_raw_cmd
);
3161 if ((ptr
->flags
& FD_RAW_READ
) && ptr
->buffer_length
) {
3162 if (ptr
->length
>= 0
3163 && ptr
->length
<= ptr
->buffer_length
)
3165 (ptr
->data
, ptr
->kernel_data
,
3166 ptr
->buffer_length
- ptr
->length
));
3173 static void raw_cmd_free(struct floppy_raw_cmd
**ptr
)
3175 struct floppy_raw_cmd
*next
;
3176 struct floppy_raw_cmd
*this;
3181 if (this->buffer_length
) {
3182 fd_dma_mem_free((unsigned long)this->kernel_data
,
3183 this->buffer_length
);
3184 this->buffer_length
= 0;
3192 static inline int raw_cmd_copyin(int cmd
, char __user
*param
,
3193 struct floppy_raw_cmd
**rcmd
)
3195 struct floppy_raw_cmd
*ptr
;
3201 ptr
= (struct floppy_raw_cmd
*)
3202 kmalloc(sizeof(struct floppy_raw_cmd
), GFP_USER
);
3208 ptr
->buffer_length
= 0;
3209 param
+= sizeof(struct floppy_raw_cmd
);
3210 if (ptr
->cmd_count
> 33)
3211 /* the command may now also take up the space
3212 * initially intended for the reply & the
3213 * reply count. Needed for long 82078 commands
3214 * such as RESTORE, which takes ... 17 command
3215 * bytes. Murphy's law #137: When you reserve
3216 * 16 bytes for a structure, you'll one day
3217 * discover that you really need 17...
3221 for (i
= 0; i
< 16; i
++)
3223 ptr
->resultcode
= 0;
3224 ptr
->kernel_data
= NULL
;
3226 if (ptr
->flags
& (FD_RAW_READ
| FD_RAW_WRITE
)) {
3227 if (ptr
->length
<= 0)
3230 (char *)fd_dma_mem_alloc(ptr
->length
);
3231 fallback_on_nodma_alloc(&ptr
->kernel_data
, ptr
->length
);
3232 if (!ptr
->kernel_data
)
3234 ptr
->buffer_length
= ptr
->length
;
3236 if (ptr
->flags
& FD_RAW_WRITE
)
3237 ECALL(fd_copyin(ptr
->data
, ptr
->kernel_data
,
3239 rcmd
= &(ptr
->next
);
3240 if (!(ptr
->flags
& FD_RAW_MORE
))
3246 static int raw_cmd_ioctl(int cmd
, void __user
*param
)
3248 struct floppy_raw_cmd
*my_raw_cmd
;
3253 if (FDCS
->rawcmd
<= 1)
3255 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
3256 if (FDC(drive
) != fdc
)
3258 if (drive
== current_drive
) {
3259 if (UDRS
->fd_ref
> 1) {
3263 } else if (UDRS
->fd_ref
) {
3272 ret
= raw_cmd_copyin(cmd
, param
, &my_raw_cmd
);
3274 raw_cmd_free(&my_raw_cmd
);
3278 raw_cmd
= my_raw_cmd
;
3279 cont
= &raw_cmd_cont
;
3280 ret
= wait_til_done(floppy_start
, 1);
3282 if (DP
->flags
& FD_DEBUG
) {
3283 DPRINT("calling disk change from raw_cmd ioctl\n");
3287 if (ret
!= -EINTR
&& FDCS
->reset
)
3290 DRS
->track
= NO_TRACK
;
3292 ret2
= raw_cmd_copyout(cmd
, param
, my_raw_cmd
);
3295 raw_cmd_free(&my_raw_cmd
);
3299 static int invalidate_drive(struct block_device
*bdev
)
3301 /* invalidate the buffer track to force a reread */
3302 set_bit((long)bdev
->bd_disk
->private_data
, &fake_change
);
3303 process_fd_request();
3304 check_disk_change(bdev
);
3308 static inline int set_geometry(unsigned int cmd
, struct floppy_struct
*g
,
3309 int drive
, int type
, struct block_device
*bdev
)
3313 /* sanity checking for parameters. */
3316 g
->track
<= 0 || g
->track
> UDP
->tracks
>> STRETCH(g
) ||
3317 /* check if reserved bits are set */
3318 (g
->stretch
& ~(FD_STRETCH
| FD_SWAPSIDES
| FD_ZEROBASED
)) != 0)
3321 if (!capable(CAP_SYS_ADMIN
))
3323 mutex_lock(&open_lock
);
3325 floppy_type
[type
] = *g
;
3326 floppy_type
[type
].name
= "user format";
3327 for (cnt
= type
<< 2; cnt
< (type
<< 2) + 4; cnt
++)
3328 floppy_sizes
[cnt
] = floppy_sizes
[cnt
+ 0x80] =
3329 floppy_type
[type
].size
+ 1;
3330 process_fd_request();
3331 for (cnt
= 0; cnt
< N_DRIVE
; cnt
++) {
3332 struct block_device
*bdev
= opened_bdev
[cnt
];
3333 if (!bdev
|| ITYPE(drive_state
[cnt
].fd_device
) != type
)
3335 __invalidate_device(bdev
);
3337 mutex_unlock(&open_lock
);
3341 if (cmd
!= FDDEFPRM
)
3342 /* notice a disk change immediately, else
3343 * we lose our settings immediately*/
3344 CALL(poll_drive(1, FD_RAW_NEED_DISK
));
3345 oldStretch
= g
->stretch
;
3346 user_params
[drive
] = *g
;
3347 if (buffer_drive
== drive
)
3348 SUPBOUND(buffer_max
, user_params
[drive
].sect
);
3349 current_type
[drive
] = &user_params
[drive
];
3350 floppy_sizes
[drive
] = user_params
[drive
].size
;
3351 if (cmd
== FDDEFPRM
)
3352 DRS
->keep_data
= -1;
3355 /* invalidation. Invalidate only when needed, i.e.
3356 * when there are already sectors in the buffer cache
3357 * whose number will change. This is useful, because
3358 * mtools often changes the geometry of the disk after
3359 * looking at the boot block */
3360 if (DRS
->maxblock
> user_params
[drive
].sect
||
3362 ((user_params
[drive
].sect
^ oldStretch
) &
3363 (FD_SWAPSIDES
| FD_ZEROBASED
)))
3364 invalidate_drive(bdev
);
3366 process_fd_request();
3371 /* handle obsolete ioctl's */
3372 static int ioctl_table
[] = {
3400 static inline int normalize_ioctl(int *cmd
, int *size
)
3404 for (i
= 0; i
< ARRAY_SIZE(ioctl_table
); i
++) {
3405 if ((*cmd
& 0xffff) == (ioctl_table
[i
] & 0xffff)) {
3406 *size
= _IOC_SIZE(*cmd
);
3407 *cmd
= ioctl_table
[i
];
3408 if (*size
> _IOC_SIZE(*cmd
)) {
3409 printk("ioctl not yet supported\n");
3418 static int get_floppy_geometry(int drive
, int type
, struct floppy_struct
**g
)
3421 *g
= &floppy_type
[type
];
3424 CALL(poll_drive(0, 0));
3425 process_fd_request();
3426 *g
= current_type
[drive
];
3433 static int fd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
3435 int drive
= (long)bdev
->bd_disk
->private_data
;
3436 int type
= ITYPE(drive_state
[drive
].fd_device
);
3437 struct floppy_struct
*g
;
3440 ret
= get_floppy_geometry(drive
, type
, &g
);
3444 geo
->heads
= g
->head
;
3445 geo
->sectors
= g
->sect
;
3446 geo
->cylinders
= g
->track
;
3450 static int fd_ioctl(struct inode
*inode
, struct file
*filp
, unsigned int cmd
,
3451 unsigned long param
)
3453 #define FD_IOCTL_ALLOWED ((filp) && (filp)->private_data)
3454 #define OUT(c,x) case c: outparam = (const char *) (x); break
3455 #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0
3457 int drive
= (long)inode
->i_bdev
->bd_disk
->private_data
;
3458 int type
= ITYPE(UDRS
->fd_device
);
3463 struct floppy_struct g
; /* geometry */
3464 struct format_descr f
;
3465 struct floppy_max_errors max_errors
;
3466 struct floppy_drive_params dp
;
3467 } inparam
; /* parameters coming from user space */
3468 const char *outparam
; /* parameters passed back to user space */
3470 /* convert compatibility eject ioctls into floppy eject ioctl.
3471 * We do this in order to provide a means to eject floppy disks before
3472 * installing the new fdutils package */
3473 if (cmd
== CDROMEJECT
|| /* CD-ROM eject */
3474 cmd
== 0x6470 /* SunOS floppy eject */ ) {
3475 DPRINT("obsolete eject ioctl\n");
3476 DPRINT("please use floppycontrol --eject\n");
3480 /* convert the old style command into a new style command */
3481 if ((cmd
& 0xff00) == 0x0200) {
3482 ECALL(normalize_ioctl(&cmd
, &size
));
3486 /* permission checks */
3487 if (((cmd
& 0x40) && !FD_IOCTL_ALLOWED
) ||
3488 ((cmd
& 0x80) && !capable(CAP_SYS_ADMIN
)))
3492 CLEARSTRUCT(&inparam
);
3493 if (_IOC_DIR(cmd
) & _IOC_WRITE
)
3494 ECALL(fd_copyin((void __user
*)param
, &inparam
, size
))
3498 if (UDRS
->fd_ref
!= 1)
3499 /* somebody else has this drive open */
3503 /* do the actual eject. Fails on
3504 * non-Sparc architectures */
3505 ret
= fd_eject(UNIT(drive
));
3507 USETF(FD_DISK_CHANGED
);
3509 process_fd_request();
3513 current_type
[drive
] = NULL
;
3514 floppy_sizes
[drive
] = MAX_DISK_SIZE
<< 1;
3515 UDRS
->keep_data
= 0;
3516 return invalidate_drive(inode
->i_bdev
);
3519 return set_geometry(cmd
, &inparam
.g
,
3520 drive
, type
, inode
->i_bdev
);
3522 ECALL(get_floppy_geometry(drive
, type
,
3523 (struct floppy_struct
**)
3528 UDP
->flags
|= FTD_MSG
;
3531 UDP
->flags
&= ~FTD_MSG
;
3536 CALL(poll_drive(1, FD_RAW_NEED_DISK
));
3538 process_fd_request();
3539 if (ret
& FD_VERIFY
)
3541 if (!(ret
& FD_DISK_WRITABLE
))
3545 if (UDRS
->fd_ref
!= 1)
3547 return do_format(drive
, &inparam
.f
);
3551 return invalidate_drive(inode
->i_bdev
);
3553 case FDSETEMSGTRESH
:
3554 UDP
->max_errors
.reporting
=
3555 (unsigned short)(param
& 0x0f);
3557 OUT(FDGETMAXERRS
, &UDP
->max_errors
);
3558 IN(FDSETMAXERRS
, &UDP
->max_errors
, max_errors
);
3561 outparam
= drive_name(type
, drive
);
3562 SUPBOUND(size
, strlen(outparam
) + 1);
3565 IN(FDSETDRVPRM
, UDP
, dp
);
3566 OUT(FDGETDRVPRM
, UDP
);
3570 CALL(poll_drive(1, FD_RAW_NEED_DISK
));
3571 process_fd_request();
3573 OUT(FDGETDRVSTAT
, UDRS
);
3576 return user_reset_fdc(drive
, (int)param
, 1);
3578 OUT(FDGETFDCSTAT
, UFDCS
);
3583 OUT(FDWERRORGET
, UDRWE
);
3590 CALL(i
= raw_cmd_ioctl(cmd
, (void __user
*)param
));
3591 process_fd_request();
3597 process_fd_request();
3604 if (_IOC_DIR(cmd
) & _IOC_READ
)
3605 return fd_copyout((void __user
*)param
, outparam
, size
);
3612 static void __init
config_types(void)
3617 /* read drive info out of physical CMOS */
3620 UDP
->cmos
= FLOPPY0_TYPE
;
3622 if (!UDP
->cmos
&& FLOPPY1_TYPE
)
3623 UDP
->cmos
= FLOPPY1_TYPE
;
3625 /* FIXME: additional physical CMOS drive detection should go here */
3627 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
3628 unsigned int type
= UDP
->cmos
;
3629 struct floppy_drive_params
*params
;
3630 const char *name
= NULL
;
3631 static char temparea
[32];
3633 if (type
< ARRAY_SIZE(default_drive_params
)) {
3634 params
= &default_drive_params
[type
].params
;
3636 name
= default_drive_params
[type
].name
;
3637 allowed_drive_mask
|= 1 << drive
;
3639 allowed_drive_mask
&= ~(1 << drive
);
3641 params
= &default_drive_params
[0].params
;
3642 sprintf(temparea
, "unknown type %d (usb?)", type
);
3646 const char *prepend
= ",";
3648 prepend
= KERN_INFO
"Floppy drive(s):";
3651 printk("%s fd%d is %s", prepend
, drive
, name
);
3659 static int floppy_release(struct inode
*inode
, struct file
*filp
)
3661 int drive
= (long)inode
->i_bdev
->bd_disk
->private_data
;
3663 mutex_lock(&open_lock
);
3664 if (UDRS
->fd_ref
< 0)
3666 else if (!UDRS
->fd_ref
--) {
3667 DPRINT("floppy_release with fd_ref == 0");
3671 opened_bdev
[drive
] = NULL
;
3672 mutex_unlock(&open_lock
);
3678 * floppy_open check for aliasing (/dev/fd0 can be the same as
3679 * /dev/PS0 etc), and disallows simultaneous access to the same
3680 * drive with different device numbers.
3682 static int floppy_open(struct inode
*inode
, struct file
*filp
)
3684 int drive
= (long)inode
->i_bdev
->bd_disk
->private_data
;
3690 filp
->private_data
= (void *)0;
3691 mutex_lock(&open_lock
);
3692 old_dev
= UDRS
->fd_device
;
3693 if (opened_bdev
[drive
] && opened_bdev
[drive
] != inode
->i_bdev
)
3696 if (!UDRS
->fd_ref
&& (UDP
->flags
& FD_BROKEN_DCL
)) {
3697 USETF(FD_DISK_CHANGED
);
3701 if (UDRS
->fd_ref
== -1 || (UDRS
->fd_ref
&& (filp
->f_flags
& O_EXCL
)))
3704 if (filp
->f_flags
& O_EXCL
)
3709 opened_bdev
[drive
] = inode
->i_bdev
;
3713 if (!floppy_track_buffer
) {
3714 /* if opening an ED drive, reserve a big buffer,
3715 * else reserve a small one */
3716 if ((UDP
->cmos
== 6) || (UDP
->cmos
== 5))
3717 try = 64; /* Only 48 actually useful */
3719 try = 32; /* Only 24 actually useful */
3721 tmp
= (char *)fd_dma_mem_alloc(1024 * try);
3722 if (!tmp
&& !floppy_track_buffer
) {
3723 try >>= 1; /* buffer only one side */
3725 tmp
= (char *)fd_dma_mem_alloc(1024 * try);
3727 if (!tmp
&& !floppy_track_buffer
) {
3728 fallback_on_nodma_alloc(&tmp
, 2048 * try);
3730 if (!tmp
&& !floppy_track_buffer
) {
3731 DPRINT("Unable to allocate DMA memory\n");
3734 if (floppy_track_buffer
) {
3736 fd_dma_mem_free((unsigned long)tmp
, try * 1024);
3738 buffer_min
= buffer_max
= -1;
3739 floppy_track_buffer
= tmp
;
3740 max_buffer_sectors
= try;
3744 UDRS
->fd_device
= iminor(inode
);
3745 set_capacity(disks
[drive
], floppy_sizes
[iminor(inode
)]);
3746 if (old_dev
!= -1 && old_dev
!= iminor(inode
)) {
3747 if (buffer_drive
== drive
)
3751 /* Allow ioctls if we have write-permissions even if read-only open.
3752 * Needed so that programs such as fdrawcmd still can work on write
3753 * protected disks */
3754 if ((filp
->f_mode
& FMODE_WRITE
) || !file_permission(filp
, MAY_WRITE
))
3755 filp
->private_data
= (void *)8;
3757 if (UFDCS
->rawcmd
== 1)
3760 if (!(filp
->f_flags
& O_NDELAY
)) {
3761 if (filp
->f_mode
& 3) {
3762 UDRS
->last_checked
= 0;
3763 check_disk_change(inode
->i_bdev
);
3764 if (UTESTF(FD_DISK_CHANGED
))
3768 if ((filp
->f_mode
& 2) && !(UTESTF(FD_DISK_WRITABLE
)))
3771 mutex_unlock(&open_lock
);
3774 if (UDRS
->fd_ref
< 0)
3779 opened_bdev
[drive
] = NULL
;
3781 mutex_unlock(&open_lock
);
3786 * Check if the disk has been changed or if a change has been faked.
3788 static int check_floppy_change(struct gendisk
*disk
)
3790 int drive
= (long)disk
->private_data
;
3792 if (UTESTF(FD_DISK_CHANGED
) || UTESTF(FD_VERIFY
))
3795 if (time_after(jiffies
, UDRS
->last_checked
+ UDP
->checkfreq
)) {
3798 process_fd_request();
3801 if (UTESTF(FD_DISK_CHANGED
) ||
3802 UTESTF(FD_VERIFY
) ||
3803 test_bit(drive
, &fake_change
) ||
3804 (!ITYPE(UDRS
->fd_device
) && !current_type
[drive
]))
3810 * This implements "read block 0" for floppy_revalidate().
3811 * Needed for format autodetection, checking whether there is
3812 * a disk in the drive, and whether that disk is writable.
3815 static void floppy_rb0_complete(struct bio
*bio
,
3818 complete((struct completion
*)bio
->bi_private
);
3821 static int __floppy_read_block_0(struct block_device
*bdev
)
3824 struct bio_vec bio_vec
;
3825 struct completion complete
;
3829 page
= alloc_page(GFP_NOIO
);
3831 process_fd_request();
3835 size
= bdev
->bd_block_size
;
3840 bio
.bi_io_vec
= &bio_vec
;
3841 bio_vec
.bv_page
= page
;
3842 bio_vec
.bv_len
= size
;
3843 bio_vec
.bv_offset
= 0;
3849 init_completion(&complete
);
3850 bio
.bi_private
= &complete
;
3851 bio
.bi_end_io
= floppy_rb0_complete
;
3853 submit_bio(READ
, &bio
);
3854 generic_unplug_device(bdev_get_queue(bdev
));
3855 process_fd_request();
3856 wait_for_completion(&complete
);
3863 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
3864 * the bootblock (block 0). "Autodetection" is also needed to check whether
3865 * there is a disk in the drive at all... Thus we also do it for fixed
3866 * geometry formats */
3867 static int floppy_revalidate(struct gendisk
*disk
)
3869 int drive
= (long)disk
->private_data
;
3870 #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device))
3874 if (UTESTF(FD_DISK_CHANGED
) ||
3875 UTESTF(FD_VERIFY
) || test_bit(drive
, &fake_change
) || NO_GEOM
) {
3876 if (usage_count
== 0) {
3877 printk("VFS: revalidate called on non-open device.\n");
3881 cf
= UTESTF(FD_DISK_CHANGED
) || UTESTF(FD_VERIFY
);
3882 if (!(cf
|| test_bit(drive
, &fake_change
) || NO_GEOM
)) {
3883 process_fd_request(); /*already done by another thread */
3888 if (buffer_drive
== drive
)
3890 clear_bit(drive
, &fake_change
);
3891 UCLEARF(FD_DISK_CHANGED
);
3896 res
= __floppy_read_block_0(opened_bdev
[drive
]);
3899 poll_drive(0, FD_RAW_NEED_DISK
);
3900 process_fd_request();
3903 set_capacity(disk
, floppy_sizes
[UDRS
->fd_device
]);
3907 static struct block_device_operations floppy_fops
= {
3908 .owner
= THIS_MODULE
,
3909 .open
= floppy_open
,
3910 .release
= floppy_release
,
3912 .getgeo
= fd_getgeo
,
3913 .media_changed
= check_floppy_change
,
3914 .revalidate_disk
= floppy_revalidate
,
3918 * Floppy Driver initialization
3919 * =============================
3922 /* Determine the floppy disk controller type */
3923 /* This routine was written by David C. Niemi */
3924 static char __init
get_fdc_version(void)
3928 output_byte(FD_DUMPREGS
); /* 82072 and better know DUMPREGS */
3931 if ((r
= result()) <= 0x00)
3932 return FDC_NONE
; /* No FDC present ??? */
3933 if ((r
== 1) && (reply_buffer
[0] == 0x80)) {
3934 printk(KERN_INFO
"FDC %d is an 8272A\n", fdc
);
3935 return FDC_8272A
; /* 8272a/765 don't know DUMPREGS */
3939 ("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
3944 if (!fdc_configure()) {
3945 printk(KERN_INFO
"FDC %d is an 82072\n", fdc
);
3946 return FDC_82072
; /* 82072 doesn't know CONFIGURE */
3949 output_byte(FD_PERPENDICULAR
);
3950 if (need_more_output() == MORE_OUTPUT
) {
3953 printk(KERN_INFO
"FDC %d is an 82072A\n", fdc
);
3954 return FDC_82072A
; /* 82072A as found on Sparcs. */
3957 output_byte(FD_UNLOCK
);
3959 if ((r
== 1) && (reply_buffer
[0] == 0x80)) {
3960 printk(KERN_INFO
"FDC %d is a pre-1991 82077\n", fdc
);
3961 return FDC_82077_ORIG
; /* Pre-1991 82077, doesn't know
3964 if ((r
!= 1) || (reply_buffer
[0] != 0x00)) {
3965 printk("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
3969 output_byte(FD_PARTID
);
3972 printk("FDC %d init: PARTID: unexpected return of %d bytes.\n",
3976 if (reply_buffer
[0] == 0x80) {
3977 printk(KERN_INFO
"FDC %d is a post-1991 82077\n", fdc
);
3978 return FDC_82077
; /* Revised 82077AA passes all the tests */
3980 switch (reply_buffer
[0] >> 5) {
3982 /* Either a 82078-1 or a 82078SL running at 5Volt */
3983 printk(KERN_INFO
"FDC %d is an 82078.\n", fdc
);
3986 printk(KERN_INFO
"FDC %d is a 44pin 82078\n", fdc
);
3989 printk(KERN_INFO
"FDC %d is a S82078B\n", fdc
);
3992 printk(KERN_INFO
"FDC %d is a National Semiconductor PC87306\n",
3997 "FDC %d init: 82078 variant with unknown PARTID=%d.\n",
3998 fdc
, reply_buffer
[0] >> 5);
3999 return FDC_82078_UNKN
;
4001 } /* get_fdc_version */
4003 /* lilo configuration */
4005 static void __init
floppy_set_flags(int *ints
, int param
, int param2
)
4009 for (i
= 0; i
< ARRAY_SIZE(default_drive_params
); i
++) {
4011 default_drive_params
[i
].params
.flags
|= param2
;
4013 default_drive_params
[i
].params
.flags
&= ~param2
;
4015 DPRINT("%s flag 0x%x\n", param2
? "Setting" : "Clearing", param
);
4018 static void __init
daring(int *ints
, int param
, int param2
)
4022 for (i
= 0; i
< ARRAY_SIZE(default_drive_params
); i
++) {
4024 default_drive_params
[i
].params
.select_delay
= 0;
4025 default_drive_params
[i
].params
.flags
|=
4026 FD_SILENT_DCL_CLEAR
;
4028 default_drive_params
[i
].params
.select_delay
=
4030 default_drive_params
[i
].params
.flags
&=
4031 ~FD_SILENT_DCL_CLEAR
;
4034 DPRINT("Assuming %s floppy hardware\n", param
? "standard" : "broken");
4037 static void __init
set_cmos(int *ints
, int dummy
, int dummy2
)
4039 int current_drive
= 0;
4042 DPRINT("wrong number of parameters for CMOS\n");
4045 current_drive
= ints
[1];
4046 if (current_drive
< 0 || current_drive
>= 8) {
4047 DPRINT("bad drive for set_cmos\n");
4051 if (current_drive
>= 4 && !FDC2
)
4055 DPRINT("setting CMOS code to %d\n", ints
[2]);
4058 static struct param_table
{
4060 void (*fn
) (int *ints
, int param
, int param2
);
4064 } config_params
[] __initdata
= {
4065 {"allowed_drive_mask", NULL
, &allowed_drive_mask
, 0xff, 0}, /* obsolete */
4066 {"all_drives", NULL
, &allowed_drive_mask
, 0xff, 0}, /* obsolete */
4067 {"asus_pci", NULL
, &allowed_drive_mask
, 0x33, 0},
4068 {"irq", NULL
, &FLOPPY_IRQ
, 6, 0},
4069 {"dma", NULL
, &FLOPPY_DMA
, 2, 0},
4070 {"daring", daring
, NULL
, 1, 0},
4072 {"two_fdc", NULL
, &FDC2
, 0x370, 0},
4073 {"one_fdc", NULL
, &FDC2
, 0, 0},
4075 {"thinkpad", floppy_set_flags
, NULL
, 1, FD_INVERTED_DCL
},
4076 {"broken_dcl", floppy_set_flags
, NULL
, 1, FD_BROKEN_DCL
},
4077 {"messages", floppy_set_flags
, NULL
, 1, FTD_MSG
},
4078 {"silent_dcl_clear", floppy_set_flags
, NULL
, 1, FD_SILENT_DCL_CLEAR
},
4079 {"debug", floppy_set_flags
, NULL
, 1, FD_DEBUG
},
4080 {"nodma", NULL
, &can_use_virtual_dma
, 1, 0},
4081 {"omnibook", NULL
, &can_use_virtual_dma
, 1, 0},
4082 {"yesdma", NULL
, &can_use_virtual_dma
, 0, 0},
4083 {"fifo_depth", NULL
, &fifo_depth
, 0xa, 0},
4084 {"nofifo", NULL
, &no_fifo
, 0x20, 0},
4085 {"usefifo", NULL
, &no_fifo
, 0, 0},
4086 {"cmos", set_cmos
, NULL
, 0, 0},
4087 {"slow", NULL
, &slow_floppy
, 1, 0},
4088 {"unexpected_interrupts", NULL
, &print_unex
, 1, 0},
4089 {"no_unexpected_interrupts", NULL
, &print_unex
, 0, 0},
4090 {"L40SX", NULL
, &print_unex
, 0, 0}
4095 static int __init
floppy_setup(char *str
)
4101 str
= get_options(str
, ARRAY_SIZE(ints
), ints
);
4103 for (i
= 0; i
< ARRAY_SIZE(config_params
); i
++) {
4104 if (strcmp(str
, config_params
[i
].name
) == 0) {
4108 param
= config_params
[i
].def_param
;
4109 if (config_params
[i
].fn
)
4112 config_params
[i
].param2
);
4113 if (config_params
[i
].var
) {
4114 DPRINT("%s=%d\n", str
, param
);
4115 *config_params
[i
].var
= param
;
4122 DPRINT("unknown floppy option [%s]\n", str
);
4124 DPRINT("allowed options are:");
4125 for (i
= 0; i
< ARRAY_SIZE(config_params
); i
++)
4126 printk(" %s", config_params
[i
].name
);
4129 DPRINT("botched floppy option\n");
4130 DPRINT("Read Documentation/floppy.txt\n");
4134 static int have_no_fdc
= -ENODEV
;
4136 static ssize_t
floppy_cmos_show(struct device
*dev
,
4137 struct device_attribute
*attr
, char *buf
)
4139 struct platform_device
*p
;
4142 p
= container_of(dev
, struct platform_device
,dev
);
4144 return sprintf(buf
, "%X\n", UDP
->cmos
);
4146 DEVICE_ATTR(cmos
,S_IRUGO
,floppy_cmos_show
,NULL
);
4148 static void floppy_device_release(struct device
*dev
)
4150 <<<<<<< HEAD
:drivers
/block
/floppy
.c
4151 complete(&device_release
);
4153 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/block
/floppy
.c
4156 static struct platform_device floppy_device
[N_DRIVE
];
4158 static struct kobject
*floppy_find(dev_t dev
, int *part
, void *data
)
4160 int drive
= (*part
& 3) | ((*part
& 0x80) >> 5);
4161 if (drive
>= N_DRIVE
||
4162 !(allowed_drive_mask
& (1 << drive
)) ||
4163 fdc_state
[FDC(drive
)].version
== FDC_NONE
)
4165 if (((*part
>> 2) & 0x1f) >= ARRAY_SIZE(floppy_type
))
4168 return get_disk(disks
[drive
]);
4171 static int __init
floppy_init(void)
4176 #if defined(CONFIG_PPC_MERGE)
4177 if (check_legacy_ioport(FDC1
))
4183 for (dr
= 0; dr
< N_DRIVE
; dr
++) {
4184 disks
[dr
] = alloc_disk(1);
4190 disks
[dr
]->major
= FLOPPY_MAJOR
;
4191 disks
[dr
]->first_minor
= TOMINOR(dr
);
4192 disks
[dr
]->fops
= &floppy_fops
;
4193 sprintf(disks
[dr
]->disk_name
, "fd%d", dr
);
4195 init_timer(&motor_off_timer
[dr
]);
4196 motor_off_timer
[dr
].data
= dr
;
4197 motor_off_timer
[dr
].function
= motor_off_callback
;
4200 err
= register_blkdev(FLOPPY_MAJOR
, "fd");
4204 floppy_queue
= blk_init_queue(do_fd_request
, &floppy_lock
);
4205 if (!floppy_queue
) {
4207 goto out_unreg_blkdev
;
4209 blk_queue_max_sectors(floppy_queue
, 64);
4211 blk_register_region(MKDEV(FLOPPY_MAJOR
, 0), 256, THIS_MODULE
,
4212 floppy_find
, NULL
, NULL
);
4214 for (i
= 0; i
< 256; i
++)
4216 floppy_sizes
[i
] = floppy_type
[ITYPE(i
)].size
;
4218 floppy_sizes
[i
] = MAX_DISK_SIZE
<< 1;
4220 reschedule_timeout(MAXTIMEOUT
, "floppy init", MAXTIMEOUT
);
4223 for (i
= 0; i
< N_FDC
; i
++) {
4228 #if defined(__sparc__) || defined(__mc68000__)
4229 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4233 FDCS
->version
= FDC_82072A
;
4237 use_virtual_dma
= can_use_virtual_dma
& 1;
4238 fdc_state
[0].address
= FDC1
;
4239 if (fdc_state
[0].address
== -1) {
4240 del_timer(&fd_timeout
);
4242 goto out_unreg_region
;
4245 fdc_state
[1].address
= FDC2
;
4248 fdc
= 0; /* reset fdc in case of unexpected interrupt */
4249 err
= floppy_grab_irq_and_dma();
4251 del_timer(&fd_timeout
);
4253 goto out_unreg_region
;
4256 /* initialise drive state */
4257 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
4260 USETF(FD_DISK_NEWCHANGE
);
4261 USETF(FD_DISK_CHANGED
);
4263 UDRS
->fd_device
= -1;
4264 floppy_track_buffer
= NULL
;
4265 max_buffer_sectors
= 0;
4268 * Small 10 msec delay to let through any interrupt that
4269 * initialization might have triggered, to not
4270 * confuse detection:
4274 for (i
= 0; i
< N_FDC
; i
++) {
4276 FDCS
->driver_version
= FD_DRIVER_VERSION
;
4277 for (unit
= 0; unit
< 4; unit
++)
4278 FDCS
->track
[unit
] = 0;
4279 if (FDCS
->address
== -1)
4282 if (user_reset_fdc(-1, FD_RESET_ALWAYS
, 0)) {
4283 /* free ioports reserved by floppy_grab_irq_and_dma() */
4284 release_region(FDCS
->address
+ 2, 4);
4285 release_region(FDCS
->address
+ 7, 1);
4287 FDCS
->version
= FDC_NONE
;
4290 /* Try to determine the floppy controller type */
4291 FDCS
->version
= get_fdc_version();
4292 if (FDCS
->version
== FDC_NONE
) {
4293 /* free ioports reserved by floppy_grab_irq_and_dma() */
4294 release_region(FDCS
->address
+ 2, 4);
4295 release_region(FDCS
->address
+ 7, 1);
4299 if (can_use_virtual_dma
== 2 && FDCS
->version
< FDC_82072A
)
4300 can_use_virtual_dma
= 0;
4303 /* Not all FDCs seem to be able to handle the version command
4304 * properly, so force a reset for the standard FDC clones,
4305 * to avoid interrupt garbage.
4307 user_reset_fdc(-1, FD_RESET_ALWAYS
, 0);
4310 del_timer(&fd_timeout
);
4314 DPRINT("no floppy controllers found\n");
4316 goto out_flush_work
;
4319 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
4320 if (!(allowed_drive_mask
& (1 << drive
)))
4322 if (fdc_state
[FDC(drive
)].version
== FDC_NONE
)
4325 floppy_device
[drive
].name
= floppy_device_name
;
4326 floppy_device
[drive
].id
= drive
;
4327 floppy_device
[drive
].dev
.release
= floppy_device_release
;
4329 err
= platform_device_register(&floppy_device
[drive
]);
4331 goto out_flush_work
;
4333 err
= device_create_file(&floppy_device
[drive
].dev
,&dev_attr_cmos
);
4335 goto out_unreg_platform_dev
;
4337 /* to be cleaned up... */
4338 disks
[drive
]->private_data
= (void *)(long)drive
;
4339 disks
[drive
]->queue
= floppy_queue
;
4340 disks
[drive
]->flags
|= GENHD_FL_REMOVABLE
;
4341 disks
[drive
]->driverfs_dev
= &floppy_device
[drive
].dev
;
4342 add_disk(disks
[drive
]);
4347 out_unreg_platform_dev
:
4348 platform_device_unregister(&floppy_device
[drive
]);
4350 flush_scheduled_work();
4352 floppy_release_irq_and_dma();
4354 blk_unregister_region(MKDEV(FLOPPY_MAJOR
, 0), 256);
4355 blk_cleanup_queue(floppy_queue
);
4357 unregister_blkdev(FLOPPY_MAJOR
, "fd");
4360 del_timer(&motor_off_timer
[dr
]);
4361 put_disk(disks
[dr
]);
4366 static DEFINE_SPINLOCK(floppy_usage_lock
);
4368 static int floppy_grab_irq_and_dma(void)
4370 unsigned long flags
;
4372 spin_lock_irqsave(&floppy_usage_lock
, flags
);
4373 if (usage_count
++) {
4374 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4377 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4380 * We might have scheduled a free_irq(), wait it to
4383 flush_scheduled_work();
4385 if (fd_request_irq()) {
4386 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4388 spin_lock_irqsave(&floppy_usage_lock
, flags
);
4390 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4393 if (fd_request_dma()) {
4394 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4396 if (can_use_virtual_dma
& 2)
4397 use_virtual_dma
= can_use_virtual_dma
= 1;
4398 if (!(can_use_virtual_dma
& 1)) {
4400 spin_lock_irqsave(&floppy_usage_lock
, flags
);
4402 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4407 for (fdc
= 0; fdc
< N_FDC
; fdc
++) {
4408 if (FDCS
->address
!= -1) {
4409 if (!request_region(FDCS
->address
+ 2, 4, "floppy")) {
4410 DPRINT("Floppy io-port 0x%04lx in use\n",
4414 if (!request_region(FDCS
->address
+ 7, 1, "floppy DIR")) {
4415 DPRINT("Floppy io-port 0x%04lx in use\n",
4419 /* address + 6 is reserved, and may be taken by IDE.
4420 * Unfortunately, Adaptec doesn't know this :-(, */
4423 for (fdc
= 0; fdc
< N_FDC
; fdc
++) {
4424 if (FDCS
->address
!= -1) {
4426 fd_outb(FDCS
->dor
, FD_DOR
);
4430 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4432 for (fdc
= 0; fdc
< N_FDC
; fdc
++)
4433 if (FDCS
->address
!= -1)
4434 fd_outb(FDCS
->dor
, FD_DOR
);
4436 * The driver will try and free resources and relies on us
4437 * to know if they were allocated or not.
4440 irqdma_allocated
= 1;
4443 release_region(FDCS
->address
+ 2, 4);
4447 while (--fdc
>= 0) {
4448 release_region(FDCS
->address
+ 2, 4);
4449 release_region(FDCS
->address
+ 7, 1);
4451 spin_lock_irqsave(&floppy_usage_lock
, flags
);
4453 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4457 static void floppy_release_irq_and_dma(void)
4460 #ifdef FLOPPY_SANITY_CHECK
4466 unsigned long tmpaddr
;
4467 unsigned long flags
;
4469 spin_lock_irqsave(&floppy_usage_lock
, flags
);
4470 if (--usage_count
) {
4471 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4474 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4475 if (irqdma_allocated
) {
4479 irqdma_allocated
= 0;
4485 floppy_enable_hlt();
4487 if (floppy_track_buffer
&& max_buffer_sectors
) {
4488 tmpsize
= max_buffer_sectors
* 1024;
4489 tmpaddr
= (unsigned long)floppy_track_buffer
;
4490 floppy_track_buffer
= NULL
;
4491 max_buffer_sectors
= 0;
4492 buffer_min
= buffer_max
= -1;
4493 fd_dma_mem_free(tmpaddr
, tmpsize
);
4495 #ifdef FLOPPY_SANITY_CHECK
4497 for (drive
= 0; drive
< N_FDC
* 4; drive
++)
4498 if (timer_pending(motor_off_timer
+ drive
))
4499 printk("motor off timer %d still active\n", drive
);
4502 if (timer_pending(&fd_timeout
))
4503 printk("floppy timer still active:%s\n", timeout_message
);
4504 if (timer_pending(&fd_timer
))
4505 printk("auxiliary floppy timer still active\n");
4506 if (work_pending(&floppy_work
))
4507 printk("work still pending\n");
4510 for (fdc
= 0; fdc
< N_FDC
; fdc
++)
4511 if (FDCS
->address
!= -1) {
4512 release_region(FDCS
->address
+ 2, 4);
4513 release_region(FDCS
->address
+ 7, 1);
4520 static char *floppy
;
4522 static void __init
parse_floppy_cfg_string(char *cfg
)
4527 for (ptr
= cfg
; *cfg
&& *cfg
!= ' ' && *cfg
!= '\t'; cfg
++) ;
4537 int __init
init_module(void)
4540 parse_floppy_cfg_string(floppy
);
4541 return floppy_init();
4544 void cleanup_module(void)
4548 <<<<<<< HEAD
:drivers
/block
/floppy
.c
4549 init_completion(&device_release
);
4551 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/block
/floppy
.c
4552 blk_unregister_region(MKDEV(FLOPPY_MAJOR
, 0), 256);
4553 unregister_blkdev(FLOPPY_MAJOR
, "fd");
4555 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
4556 del_timer_sync(&motor_off_timer
[drive
]);
4558 if ((allowed_drive_mask
& (1 << drive
)) &&
4559 fdc_state
[FDC(drive
)].version
!= FDC_NONE
) {
4560 del_gendisk(disks
[drive
]);
4561 device_remove_file(&floppy_device
[drive
].dev
, &dev_attr_cmos
);
4562 platform_device_unregister(&floppy_device
[drive
]);
4564 put_disk(disks
[drive
]);
4567 del_timer_sync(&fd_timeout
);
4568 del_timer_sync(&fd_timer
);
4569 blk_cleanup_queue(floppy_queue
);
4572 floppy_release_irq_and_dma();
4574 /* eject disk, if any */
4576 <<<<<<< HEAD
:drivers
/block
/floppy
.c
4578 wait_for_completion(&device_release
);
4580 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/block
/floppy
.c
4583 module_param(floppy
, charp
, 0);
4584 module_param(FLOPPY_IRQ
, int, 0);
4585 module_param(FLOPPY_DMA
, int, 0);
4586 MODULE_AUTHOR("Alain L. Knaff");
4587 MODULE_SUPPORTED_DEVICE("fd");
4588 MODULE_LICENSE("GPL");
4592 __setup("floppy=", floppy_setup
);
4593 module_init(floppy_init
)
4596 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR
);