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 #undef FLOPPY_SILENT_DCL_CLEAR
149 #define REALLY_SLOW_IO
153 #define DPRINT(format, args...) \
154 pr_info("floppy%d: " format, current_drive, ##args)
156 #define DCL_DEBUG /* debug disk change line */
158 #define debug_dcl(test, fmt, args...) \
159 do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0)
161 #define debug_dcl(test, fmt, args...) \
162 do { if (0) DPRINT(fmt, ##args); } while (0)
165 /* do print messages for unexpected interrupts */
166 static int print_unex
= 1;
167 #include <linux/module.h>
168 #include <linux/sched.h>
169 #include <linux/fs.h>
170 #include <linux/kernel.h>
171 #include <linux/timer.h>
172 #include <linux/workqueue.h>
174 #include <linux/fdreg.h>
175 #include <linux/fd.h>
176 #include <linux/hdreg.h>
177 #include <linux/errno.h>
178 #include <linux/slab.h>
179 #include <linux/mm.h>
180 #include <linux/bio.h>
181 #include <linux/string.h>
182 #include <linux/jiffies.h>
183 #include <linux/fcntl.h>
184 #include <linux/delay.h>
185 #include <linux/mc146818rtc.h> /* CMOS defines */
186 #include <linux/ioport.h>
187 #include <linux/interrupt.h>
188 #include <linux/init.h>
189 #include <linux/platform_device.h>
190 #include <linux/mod_devicetable.h>
191 #include <linux/mutex.h>
192 #include <linux/io.h>
193 #include <linux/uaccess.h>
194 #include <linux/async.h>
197 * PS/2 floppies have much slower step rates than regular floppies.
198 * It's been recommended that take about 1/4 of the default speed
199 * in some more extreme cases.
201 static DEFINE_MUTEX(floppy_mutex
);
202 static int slow_floppy
;
207 static int FLOPPY_IRQ
= 6;
208 static int FLOPPY_DMA
= 2;
209 static int can_use_virtual_dma
= 2;
211 * can use virtual DMA:
212 * 0 = use of virtual DMA disallowed by config
213 * 1 = use of virtual DMA prescribed by config
214 * 2 = no virtual DMA preference configured. By default try hard DMA,
215 * but fall back on virtual DMA when not enough memory available
218 static int use_virtual_dma
;
222 * 1 using virtual DMA
223 * This variable is set to virtual when a DMA mem problem arises, and
224 * reset back in floppy_grab_irq_and_dma.
225 * It is not safe to reset it in other circumstances, because the floppy
226 * driver may have several buffers in use at once, and we do currently not
227 * record each buffers capabilities
230 static DEFINE_SPINLOCK(floppy_lock
);
232 static unsigned short virtual_dma_port
= 0x3f0;
233 irqreturn_t
floppy_interrupt(int irq
, void *dev_id
);
234 static int set_dor(int fdc
, char mask
, char data
);
236 #define K_64 0x10000 /* 64KB */
238 /* the following is the mask of allowed drives. By default units 2 and
239 * 3 of both floppy controllers are disabled, because switching on the
240 * motor of these drives causes system hangs on some PCI computers. drive
241 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
242 * a drive is allowed.
244 * NOTE: This must come before we include the arch floppy header because
245 * some ports reference this variable from there. -DaveM
248 static int allowed_drive_mask
= 0x33;
250 #include <asm/floppy.h>
252 static int irqdma_allocated
;
254 #include <linux/blkdev.h>
255 #include <linux/blkpg.h>
256 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
257 #include <linux/completion.h>
259 static struct request
*current_req
;
260 static void do_fd_request(struct request_queue
*q
);
261 static int set_next_request(void);
263 #ifndef fd_get_dma_residue
264 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
267 /* Dma Memory related stuff */
269 #ifndef fd_dma_mem_free
270 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
273 #ifndef fd_dma_mem_alloc
274 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size))
277 static inline void fallback_on_nodma_alloc(char **addr
, size_t l
)
279 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
281 return; /* we have the memory */
282 if (can_use_virtual_dma
!= 2)
283 return; /* no fallback allowed */
284 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n");
285 *addr
= (char *)nodma_mem_alloc(l
);
291 /* End dma memory related stuff */
293 static unsigned long fake_change
;
294 static bool initialized
;
296 #define ITYPE(x) (((x) >> 2) & 0x1f)
297 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
298 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
299 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
300 /* reverse mapping from unit and fdc to drive */
301 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
303 #define DP (&drive_params[current_drive])
304 #define DRS (&drive_state[current_drive])
305 #define DRWE (&write_errors[current_drive])
306 #define FDCS (&fdc_state[fdc])
308 #define UDP (&drive_params[drive])
309 #define UDRS (&drive_state[drive])
310 #define UDRWE (&write_errors[drive])
311 #define UFDCS (&fdc_state[FDC(drive)])
313 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
314 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
317 #define COMMAND (raw_cmd->cmd[0])
318 #define DR_SELECT (raw_cmd->cmd[1])
319 #define TRACK (raw_cmd->cmd[2])
320 #define HEAD (raw_cmd->cmd[3])
321 #define SECTOR (raw_cmd->cmd[4])
322 #define SIZECODE (raw_cmd->cmd[5])
323 #define SECT_PER_TRACK (raw_cmd->cmd[6])
324 #define GAP (raw_cmd->cmd[7])
325 #define SIZECODE2 (raw_cmd->cmd[8])
329 #define F_SIZECODE (raw_cmd->cmd[2])
330 #define F_SECT_PER_TRACK (raw_cmd->cmd[3])
331 #define F_GAP (raw_cmd->cmd[4])
332 #define F_FILL (raw_cmd->cmd[5])
336 * Maximum disk size (in kilobytes).
337 * This default is used whenever the current disk size is unknown.
338 * [Now it is rather a minimum]
340 #define MAX_DISK_SIZE 4 /* 3984 */
343 * globals used by 'result()'
345 #define MAX_REPLIES 16
346 static unsigned char reply_buffer
[MAX_REPLIES
];
347 static int inr
; /* size of reply buffer, when called from interrupt */
348 #define ST0 (reply_buffer[0])
349 #define ST1 (reply_buffer[1])
350 #define ST2 (reply_buffer[2])
351 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */
352 #define R_TRACK (reply_buffer[3])
353 #define R_HEAD (reply_buffer[4])
354 #define R_SECTOR (reply_buffer[5])
355 #define R_SIZECODE (reply_buffer[6])
357 #define SEL_DLY (2 * HZ / 100)
360 * this struct defines the different floppy drive types.
363 struct floppy_drive_params params
;
364 const char *name
; /* name printed while booting */
365 } default_drive_params
[] = {
366 /* NOTE: the time values in jiffies should be in msec!
368 | Maximum data rate supported by drive type
369 | | Head load time, msec
370 | | | Head unload time, msec (not used)
371 | | | | Step rate interval, usec
372 | | | | | Time needed for spinup time (jiffies)
373 | | | | | | Timeout for spinning down (jiffies)
374 | | | | | | | Spindown offset (where disk stops)
375 | | | | | | | | Select delay
376 | | | | | | | | | RPS
377 | | | | | | | | | | Max number of tracks
378 | | | | | | | | | | | Interrupt timeout
379 | | | | | | | | | | | | Max nonintlv. sectors
380 | | | | | | | | | | | | | -Max Errors- flags */
381 {{0, 500, 16, 16, 8000, 1*HZ
, 3*HZ
, 0, SEL_DLY
, 5, 80, 3*HZ
, 20, {3,1,2,0,2}, 0,
382 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ
/2, 0 }, "unknown" },
384 {{1, 300, 16, 16, 8000, 1*HZ
, 3*HZ
, 0, SEL_DLY
, 5, 40, 3*HZ
, 17, {3,1,2,0,2}, 0,
385 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ
/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
387 {{2, 500, 16, 16, 6000, 4*HZ
/10, 3*HZ
, 14, SEL_DLY
, 6, 83, 3*HZ
, 17, {3,1,2,0,2}, 0,
388 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ
/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
390 {{3, 250, 16, 16, 3000, 1*HZ
, 3*HZ
, 0, SEL_DLY
, 5, 83, 3*HZ
, 20, {3,1,2,0,2}, 0,
391 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ
/2, 4 }, "720k" }, /*3 1/2 DD*/
393 {{4, 500, 16, 16, 4000, 4*HZ
/10, 3*HZ
, 10, SEL_DLY
, 5, 83, 3*HZ
, 20, {3,1,2,0,2}, 0,
394 0, { 7, 4,25,22,31,21,29,11}, 3*HZ
/2, 7 }, "1.44M" }, /*3 1/2 HD*/
396 {{5, 1000, 15, 8, 3000, 4*HZ
/10, 3*HZ
, 10, SEL_DLY
, 5, 83, 3*HZ
, 40, {3,1,2,0,2}, 0,
397 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ
/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
399 {{6, 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" } /*3 1/2 ED*/
401 /* | --autodetected formats--- | | |
402 * read_track | | Name printed when booting
404 * Frequency of disk change checks */
407 static struct floppy_drive_params drive_params
[N_DRIVE
];
408 static struct floppy_drive_struct drive_state
[N_DRIVE
];
409 static struct floppy_write_errors write_errors
[N_DRIVE
];
410 static struct timer_list motor_off_timer
[N_DRIVE
];
411 static struct gendisk
*disks
[N_DRIVE
];
412 static struct block_device
*opened_bdev
[N_DRIVE
];
413 static DEFINE_MUTEX(open_lock
);
414 static struct floppy_raw_cmd
*raw_cmd
, default_raw_cmd
;
415 static int fdc_queue
;
418 * This struct defines the different floppy types.
420 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
421 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
422 * tells if the disk is in Commodore 1581 format, which means side 0 sectors
423 * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
424 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
425 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
426 * side 0 is on physical side 0 (but with the misnamed sector IDs).
427 * 'stretch' should probably be renamed to something more general, like
430 * Bits 2 through 9 of 'stretch' tell the number of the first sector.
431 * The LSB (bit 2) is flipped. For most disks, the first sector
432 * is 1 (represented by 0x00<<2). For some CP/M and music sampler
433 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
434 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
436 * Other parameters should be self-explanatory (see also setfdprm(8)).
445 | | | | | | Data rate, | 0x40 for perp
446 | | | | | | | Spec1 (stepping rate, head unload
447 | | | | | | | | /fmt gap (gap2) */
448 static struct floppy_struct floppy_type
[32] = {
449 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL
}, /* 0 no testing */
450 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
451 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
452 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
453 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
454 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
455 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
456 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
457 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
458 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
460 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
461 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
462 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
463 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
464 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
465 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
466 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
467 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
468 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
469 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
471 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
472 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
473 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
474 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
475 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
476 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
477 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
478 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
479 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
480 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
482 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
483 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
486 #define SECTSIZE (_FD_SECTSIZE(*floppy))
488 /* Auto-detection: Disk type used until the next media change occurs. */
489 static struct floppy_struct
*current_type
[N_DRIVE
];
492 * User-provided type information. current_type points to
493 * the respective entry of this array.
495 static struct floppy_struct user_params
[N_DRIVE
];
497 static sector_t floppy_sizes
[256];
499 static char floppy_device_name
[] = "floppy";
502 * The driver is trying to determine the correct media format
503 * while probing is set. rw_interrupt() clears it after a
508 /* Synchronization of FDC access. */
509 #define FD_COMMAND_NONE -1
510 #define FD_COMMAND_ERROR 2
511 #define FD_COMMAND_OKAY 3
513 static volatile int command_status
= FD_COMMAND_NONE
;
514 static unsigned long fdc_busy
;
515 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait
);
516 static DECLARE_WAIT_QUEUE_HEAD(command_done
);
518 /* Errors during formatting are counted here. */
519 static int format_errors
;
521 /* Format request descriptor. */
522 static struct format_descr format_req
;
525 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
526 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
527 * H is head unload time (1=16ms, 2=32ms, etc)
532 * Because these are written to by the DMA controller, they must
533 * not contain a 64k byte boundary crossing, or data will be
536 static char *floppy_track_buffer
;
537 static int max_buffer_sectors
;
540 typedef void (*done_f
)(int);
541 static const struct cont_t
{
542 void (*interrupt
)(void);
543 /* this is called after the interrupt of the
545 void (*redo
)(void); /* this is called to retry the operation */
546 void (*error
)(void); /* this is called to tally an error */
547 done_f done
; /* this is called to say if the operation has
548 * succeeded/failed */
551 static void floppy_ready(void);
552 static void floppy_start(void);
553 static void process_fd_request(void);
554 static void recalibrate_floppy(void);
555 static void floppy_shutdown(struct work_struct
*);
557 static int floppy_request_regions(int);
558 static void floppy_release_regions(int);
559 static int floppy_grab_irq_and_dma(void);
560 static void floppy_release_irq_and_dma(void);
563 * The "reset" variable should be tested whenever an interrupt is scheduled,
564 * after the commands have been sent. This is to ensure that the driver doesn't
565 * get wedged when the interrupt doesn't come because of a failed command.
566 * reset doesn't need to be tested before sending commands, because
567 * output_byte is automatically disabled when reset is set.
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 atomic_t usage_count
= ATOMIC_INIT(0);
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 workqueue_struct
*floppy_wq
;
594 static struct floppy_struct
*_floppy
= floppy_type
;
595 static unsigned char current_drive
;
596 static long current_count_sectors
;
597 static unsigned char fsector_t
; /* sector in track */
598 static unsigned char in_sector_offset
; /* offset within physical sector,
599 * expressed in units of 512 bytes */
601 static inline bool drive_no_geom(int drive
)
603 return !current_type
[drive
] && !ITYPE(UDRS
->fd_device
);
607 static inline int fd_eject(int drive
)
618 static long unsigned debugtimer
;
620 static inline void set_debugt(void)
622 debugtimer
= jiffies
;
625 static inline void debugt(const char *func
, const char *msg
)
627 if (DP
->flags
& DEBUGT
)
628 pr_info("%s:%s dtime=%lu\n", func
, msg
, jiffies
- debugtimer
);
631 static inline void set_debugt(void) { }
632 static inline void debugt(const char *func
, const char *msg
) { }
636 static DECLARE_DELAYED_WORK(fd_timeout
, floppy_shutdown
);
637 static const char *timeout_message
;
639 static void is_alive(const char *func
, const char *message
)
641 /* this routine checks whether the floppy driver is "alive" */
642 if (test_bit(0, &fdc_busy
) && command_status
< 2 &&
643 !delayed_work_pending(&fd_timeout
)) {
644 DPRINT("%s: timeout handler died. %s\n", func
, message
);
648 static void (*do_floppy
)(void) = NULL
;
652 static void (*lasthandler
)(void);
653 static unsigned long interruptjiffies
;
654 static unsigned long resultjiffies
;
655 static int resultsize
;
656 static unsigned long lastredo
;
658 static struct output_log
{
660 unsigned char status
;
661 unsigned long jiffies
;
662 } output_log
[OLOGSIZE
];
664 static int output_log_pos
;
666 #define current_reqD -1
667 #define MAXTIMEOUT -2
669 static void __reschedule_timeout(int drive
, const char *message
)
673 if (drive
== current_reqD
)
674 drive
= current_drive
;
676 if (drive
< 0 || drive
>= N_DRIVE
) {
680 delay
= UDP
->timeout
;
682 mod_delayed_work(floppy_wq
, &fd_timeout
, delay
);
683 if (UDP
->flags
& FD_DEBUG
)
684 DPRINT("reschedule timeout %s\n", message
);
685 timeout_message
= message
;
688 static void reschedule_timeout(int drive
, const char *message
)
692 spin_lock_irqsave(&floppy_lock
, flags
);
693 __reschedule_timeout(drive
, message
);
694 spin_unlock_irqrestore(&floppy_lock
, flags
);
697 #define INFBOUND(a, b) (a) = max_t(int, a, b)
698 #define SUPBOUND(a, b) (a) = min_t(int, a, b)
701 * Bottom half floppy driver.
702 * ==========================
704 * This part of the file contains the code talking directly to the hardware,
705 * and also the main service loop (seek-configure-spinup-command)
710 * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
711 * and the last_checked date.
713 * last_checked is the date of the last check which showed 'no disk change'
714 * FD_DISK_CHANGE is set under two conditions:
715 * 1. The floppy has been changed after some i/o to that floppy already
717 * 2. No floppy disk is in the drive. This is done in order to ensure that
718 * requests are quickly flushed in case there is no disk in the drive. It
719 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
722 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
723 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
724 * each seek. If a disk is present, the disk change line should also be
725 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
726 * change line is set, this means either that no disk is in the drive, or
727 * that it has been removed since the last seek.
729 * This means that we really have a third possibility too:
730 * The floppy has been changed after the last seek.
733 static int disk_change(int drive
)
735 int fdc
= FDC(drive
);
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
);
746 debug_dcl(UDP
->flags
,
747 "checking disk change line for drive %d\n", drive
);
748 debug_dcl(UDP
->flags
, "jiffies=%lu\n", jiffies
);
749 debug_dcl(UDP
->flags
, "disk change line=%x\n", fd_inb(FD_DIR
) & 0x80);
750 debug_dcl(UDP
->flags
, "flags=%lx\n", UDRS
->flags
);
752 if (UDP
->flags
& FD_BROKEN_DCL
)
753 return test_bit(FD_DISK_CHANGED_BIT
, &UDRS
->flags
);
754 if ((fd_inb(FD_DIR
) ^ UDP
->flags
) & 0x80) {
755 set_bit(FD_VERIFY_BIT
, &UDRS
->flags
);
756 /* verify write protection */
758 if (UDRS
->maxblock
) /* mark it changed */
759 set_bit(FD_DISK_CHANGED_BIT
, &UDRS
->flags
);
761 /* invalidate its geometry */
762 if (UDRS
->keep_data
>= 0) {
763 if ((UDP
->flags
& FTD_MSG
) &&
764 current_type
[drive
] != NULL
)
765 DPRINT("Disk type is undefined after disk change\n");
766 current_type
[drive
] = NULL
;
767 floppy_sizes
[TOMINOR(drive
)] = MAX_DISK_SIZE
<< 1;
772 UDRS
->last_checked
= jiffies
;
773 clear_bit(FD_DISK_NEWCHANGE_BIT
, &UDRS
->flags
);
778 static inline int is_selected(int dor
, int unit
)
780 return ((dor
& (0x10 << unit
)) && (dor
& 3) == unit
);
783 static bool is_ready_state(int status
)
785 int state
= status
& (STATUS_READY
| STATUS_DIR
| STATUS_DMA
);
786 return state
== STATUS_READY
;
789 static int set_dor(int fdc
, char mask
, char data
)
793 unsigned char newdor
;
794 unsigned char olddor
;
796 if (FDCS
->address
== -1)
800 newdor
= (olddor
& mask
) | data
;
801 if (newdor
!= olddor
) {
803 if (is_selected(olddor
, unit
) && !is_selected(newdor
, unit
)) {
804 drive
= REVDRIVE(fdc
, unit
);
805 debug_dcl(UDP
->flags
,
806 "calling disk change from set_dor\n");
810 fd_outb(newdor
, FD_DOR
);
813 if (!is_selected(olddor
, unit
) && is_selected(newdor
, unit
)) {
814 drive
= REVDRIVE(fdc
, unit
);
815 UDRS
->select_date
= jiffies
;
821 static void twaddle(void)
823 if (DP
->select_delay
)
825 fd_outb(FDCS
->dor
& ~(0x10 << UNIT(current_drive
)), FD_DOR
);
826 fd_outb(FDCS
->dor
, FD_DOR
);
827 DRS
->select_date
= jiffies
;
831 * Reset all driver information about the current fdc.
832 * This is needed after a reset, and after a raw command.
834 static void reset_fdc_info(int mode
)
838 FDCS
->spec1
= FDCS
->spec2
= -1;
839 FDCS
->need_configure
= 1;
842 for (drive
= 0; drive
< N_DRIVE
; drive
++)
843 if (FDC(drive
) == fdc
&& (mode
|| UDRS
->track
!= NEED_1_RECAL
))
844 UDRS
->track
= NEED_2_RECAL
;
847 /* selects the fdc and drive, and enables the fdc's input/dma. */
848 static void set_fdc(int drive
)
850 if (drive
>= 0 && drive
< N_DRIVE
) {
852 current_drive
= drive
;
854 if (fdc
!= 1 && fdc
!= 0) {
855 pr_info("bad fdc value\n");
860 set_dor(1 - fdc
, ~8, 0);
862 if (FDCS
->rawcmd
== 2)
864 if (fd_inb(FD_STATUS
) != STATUS_READY
)
868 /* locks the driver */
869 static int lock_fdc(int drive
, bool interruptible
)
871 if (WARN(atomic_read(&usage_count
) == 0,
872 "Trying to lock fdc while usage count=0\n"))
875 if (wait_event_interruptible(fdc_wait
, !test_and_set_bit(0, &fdc_busy
)))
878 command_status
= FD_COMMAND_NONE
;
880 reschedule_timeout(drive
, "lock fdc");
885 /* unlocks the driver */
886 static void unlock_fdc(void)
888 if (!test_bit(0, &fdc_busy
))
889 DPRINT("FDC access conflict!\n");
892 command_status
= FD_COMMAND_NONE
;
893 cancel_delayed_work(&fd_timeout
);
896 clear_bit(0, &fdc_busy
);
900 /* switches the motor off after a given timeout */
901 static void motor_off_callback(unsigned long nr
)
903 unsigned char mask
= ~(0x10 << UNIT(nr
));
905 set_dor(FDC(nr
), mask
, 0);
908 /* schedules motor off */
909 static void floppy_off(unsigned int drive
)
911 unsigned long volatile delta
;
912 int fdc
= FDC(drive
);
914 if (!(FDCS
->dor
& (0x10 << UNIT(drive
))))
917 del_timer(motor_off_timer
+ drive
);
919 /* make spindle stop in a position which minimizes spinup time
922 delta
= jiffies
- UDRS
->first_read_date
+ HZ
-
923 UDP
->spindown_offset
;
924 delta
= ((delta
* UDP
->rps
) % HZ
) / UDP
->rps
;
925 motor_off_timer
[drive
].expires
=
926 jiffies
+ UDP
->spindown
- delta
;
928 add_timer(motor_off_timer
+ drive
);
932 * cycle through all N_DRIVE floppy drives, for disk change testing.
933 * stopping at current drive. This is done before any long operation, to
934 * be sure to have up to date disk change information.
936 static void scandrives(void)
942 if (DP
->select_delay
)
945 saved_drive
= current_drive
;
946 for (i
= 0; i
< N_DRIVE
; i
++) {
947 drive
= (saved_drive
+ i
+ 1) % N_DRIVE
;
948 if (UDRS
->fd_ref
== 0 || UDP
->select_delay
!= 0)
949 continue; /* skip closed drives */
951 if (!(set_dor(fdc
, ~3, UNIT(drive
) | (0x10 << UNIT(drive
))) &
952 (0x10 << UNIT(drive
))))
953 /* switch the motor off again, if it was off to
955 set_dor(fdc
, ~(0x10 << UNIT(drive
)), 0);
957 set_fdc(saved_drive
);
960 static void empty(void)
964 static DECLARE_WORK(floppy_work
, NULL
);
966 static void schedule_bh(void (*handler
)(void))
968 WARN_ON(work_pending(&floppy_work
));
970 PREPARE_WORK(&floppy_work
, (work_func_t
)handler
);
971 queue_work(floppy_wq
, &floppy_work
);
974 static DECLARE_DELAYED_WORK(fd_timer
, NULL
);
976 static void cancel_activity(void)
979 cancel_delayed_work_sync(&fd_timer
);
980 cancel_work_sync(&floppy_work
);
983 /* this function makes sure that the disk stays in the drive during the
985 static void fd_watchdog(struct work_struct
*arg
)
987 debug_dcl(DP
->flags
, "calling disk change from watchdog\n");
989 if (disk_change(current_drive
)) {
990 DPRINT("disk removed during i/o\n");
995 cancel_delayed_work(&fd_timer
);
996 PREPARE_DELAYED_WORK(&fd_timer
, fd_watchdog
);
997 queue_delayed_work(floppy_wq
, &fd_timer
, HZ
/ 10);
1001 static void main_command_interrupt(void)
1003 cancel_delayed_work(&fd_timer
);
1007 /* waits for a delay (spinup or select) to pass */
1008 static int fd_wait_for_completion(unsigned long expires
, work_func_t function
)
1011 reset_fdc(); /* do the reset during sleep to win time
1012 * if we don't need to sleep, it's a good
1013 * occasion anyways */
1017 if (time_before(jiffies
, expires
)) {
1018 cancel_delayed_work(&fd_timer
);
1019 PREPARE_DELAYED_WORK(&fd_timer
, function
);
1020 queue_delayed_work(floppy_wq
, &fd_timer
, expires
- jiffies
);
1026 static void setup_DMA(void)
1030 if (raw_cmd
->length
== 0) {
1033 pr_info("zero dma transfer size:");
1034 for (i
= 0; i
< raw_cmd
->cmd_count
; i
++)
1035 pr_cont("%x,", raw_cmd
->cmd
[i
]);
1041 if (((unsigned long)raw_cmd
->kernel_data
) % 512) {
1042 pr_info("non aligned address: %p\n", raw_cmd
->kernel_data
);
1047 f
= claim_dma_lock();
1050 if (fd_dma_setup(raw_cmd
->kernel_data
, raw_cmd
->length
,
1051 (raw_cmd
->flags
& FD_RAW_READ
) ?
1052 DMA_MODE_READ
: DMA_MODE_WRITE
, FDCS
->address
) < 0) {
1053 release_dma_lock(f
);
1058 release_dma_lock(f
);
1061 fd_cacheflush(raw_cmd
->kernel_data
, raw_cmd
->length
);
1062 fd_set_dma_mode((raw_cmd
->flags
& FD_RAW_READ
) ?
1063 DMA_MODE_READ
: DMA_MODE_WRITE
);
1064 fd_set_dma_addr(raw_cmd
->kernel_data
);
1065 fd_set_dma_count(raw_cmd
->length
);
1066 virtual_dma_port
= FDCS
->address
;
1068 release_dma_lock(f
);
1072 static void show_floppy(void);
1074 /* waits until the fdc becomes ready */
1075 static int wait_til_ready(void)
1082 for (counter
= 0; counter
< 10000; counter
++) {
1083 status
= fd_inb(FD_STATUS
);
1084 if (status
& STATUS_READY
)
1088 DPRINT("Getstatus times out (%x) on fdc %d\n", status
, fdc
);
1095 /* sends a command byte to the fdc */
1096 static int output_byte(char byte
)
1098 int status
= wait_til_ready();
1103 if (is_ready_state(status
)) {
1104 fd_outb(byte
, FD_DATA
);
1105 output_log
[output_log_pos
].data
= byte
;
1106 output_log
[output_log_pos
].status
= status
;
1107 output_log
[output_log_pos
].jiffies
= jiffies
;
1108 output_log_pos
= (output_log_pos
+ 1) % OLOGSIZE
;
1113 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
1120 /* gets the response from the fdc */
1121 static int result(void)
1126 for (i
= 0; i
< MAX_REPLIES
; i
++) {
1127 status
= wait_til_ready();
1130 status
&= STATUS_DIR
| STATUS_READY
| STATUS_BUSY
| STATUS_DMA
;
1131 if ((status
& ~STATUS_BUSY
) == STATUS_READY
) {
1132 resultjiffies
= jiffies
;
1136 if (status
== (STATUS_DIR
| STATUS_READY
| STATUS_BUSY
))
1137 reply_buffer
[i
] = fd_inb(FD_DATA
);
1142 DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
1150 #define MORE_OUTPUT -2
1151 /* does the fdc need more output? */
1152 static int need_more_output(void)
1154 int status
= wait_til_ready();
1159 if (is_ready_state(status
))
1165 /* Set perpendicular mode as required, based on data rate, if supported.
1166 * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1168 static void perpendicular_mode(void)
1170 unsigned char perp_mode
;
1172 if (raw_cmd
->rate
& 0x40) {
1173 switch (raw_cmd
->rate
& 3) {
1181 DPRINT("Invalid data rate for perpendicular mode!\n");
1185 * convenient way to return to
1186 * redo without too much hassle
1187 * (deep stack et al.)
1194 if (FDCS
->perp_mode
== perp_mode
)
1196 if (FDCS
->version
>= FDC_82077_ORIG
) {
1197 output_byte(FD_PERPENDICULAR
);
1198 output_byte(perp_mode
);
1199 FDCS
->perp_mode
= perp_mode
;
1200 } else if (perp_mode
) {
1201 DPRINT("perpendicular mode not supported by this FDC.\n");
1203 } /* perpendicular_mode */
1205 static int fifo_depth
= 0xa;
1208 static int fdc_configure(void)
1211 output_byte(FD_CONFIGURE
);
1212 if (need_more_output() != MORE_OUTPUT
)
1215 output_byte(0x10 | (no_fifo
& 0x20) | (fifo_depth
& 0xf));
1216 output_byte(0); /* pre-compensation from track
1221 #define NOMINAL_DTR 500
1223 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1224 * head load time, and DMA disable flag to values needed by floppy.
1226 * The value "dtr" is the data transfer rate in Kbps. It is needed
1227 * to account for the data rate-based scaling done by the 82072 and 82077
1228 * FDC types. This parameter is ignored for other types of FDCs (i.e.
1231 * Note that changing the data transfer rate has a (probably deleterious)
1232 * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1233 * fdc_specify is called again after each data transfer rate
1236 * srt: 1000 to 16000 in microseconds
1237 * hut: 16 to 240 milliseconds
1238 * hlt: 2 to 254 milliseconds
1240 * These values are rounded up to the next highest available delay time.
1242 static void fdc_specify(void)
1244 unsigned char spec1
;
1245 unsigned char spec2
;
1249 unsigned long dtr
= NOMINAL_DTR
;
1250 unsigned long scale_dtr
= NOMINAL_DTR
;
1251 int hlt_max_code
= 0x7f;
1252 int hut_max_code
= 0xf;
1254 if (FDCS
->need_configure
&& FDCS
->version
>= FDC_82072A
) {
1256 FDCS
->need_configure
= 0;
1259 switch (raw_cmd
->rate
& 0x03) {
1265 if (FDCS
->version
>= FDC_82078
) {
1266 /* chose the default rate table, not the one
1267 * where 1 = 2 Mbps */
1268 output_byte(FD_DRIVESPEC
);
1269 if (need_more_output() == MORE_OUTPUT
) {
1270 output_byte(UNIT(current_drive
));
1280 if (FDCS
->version
>= FDC_82072
) {
1282 hlt_max_code
= 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1283 hut_max_code
= 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1286 /* Convert step rate from microseconds to milliseconds and 4 bits */
1287 srt
= 16 - DIV_ROUND_UP(DP
->srt
* scale_dtr
/ 1000, NOMINAL_DTR
);
1294 hlt
= DIV_ROUND_UP(DP
->hlt
* scale_dtr
/ 2, NOMINAL_DTR
);
1297 else if (hlt
> 0x7f)
1300 hut
= DIV_ROUND_UP(DP
->hut
* scale_dtr
/ 16, NOMINAL_DTR
);
1306 spec1
= (srt
<< 4) | hut
;
1307 spec2
= (hlt
<< 1) | (use_virtual_dma
& 1);
1309 /* If these parameters did not change, just return with success */
1310 if (FDCS
->spec1
!= spec1
|| FDCS
->spec2
!= spec2
) {
1311 /* Go ahead and set spec1 and spec2 */
1312 output_byte(FD_SPECIFY
);
1313 output_byte(FDCS
->spec1
= spec1
);
1314 output_byte(FDCS
->spec2
= spec2
);
1318 /* Set the FDC's data transfer rate on behalf of the specified drive.
1319 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1320 * of the specify command (i.e. using the fdc_specify function).
1322 static int fdc_dtr(void)
1324 /* If data rate not already set to desired value, set it. */
1325 if ((raw_cmd
->rate
& 3) == FDCS
->dtr
)
1329 fd_outb(raw_cmd
->rate
& 3, FD_DCR
);
1331 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1332 * need a stabilization period of several milliseconds to be
1333 * enforced after data rate changes before R/W operations.
1334 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1336 FDCS
->dtr
= raw_cmd
->rate
& 3;
1337 return fd_wait_for_completion(jiffies
+ 2UL * HZ
/ 100,
1338 (work_func_t
)floppy_ready
);
1341 static void tell_sector(void)
1343 pr_cont(": track %d, head %d, sector %d, size %d",
1344 R_TRACK
, R_HEAD
, R_SECTOR
, R_SIZECODE
);
1347 static void print_errors(void)
1350 if (ST0
& ST0_ECE
) {
1351 pr_cont("Recalibrate failed!");
1352 } else if (ST2
& ST2_CRC
) {
1353 pr_cont("data CRC error");
1355 } else if (ST1
& ST1_CRC
) {
1356 pr_cont("CRC error");
1358 } else if ((ST1
& (ST1_MAM
| ST1_ND
)) ||
1361 pr_cont("sector not found");
1364 pr_cont("probe failed...");
1365 } else if (ST2
& ST2_WC
) { /* seek error */
1366 pr_cont("wrong cylinder");
1367 } else if (ST2
& ST2_BC
) { /* cylinder marked as bad */
1368 pr_cont("bad cylinder");
1370 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
1378 * OK, this error interpreting routine is called after a
1379 * DMA read/write has succeeded
1380 * or failed, so we check the results, and copy any buffers.
1381 * hhb: Added better error reporting.
1382 * ak: Made this into a separate routine.
1384 static int interpret_errors(void)
1389 DPRINT("-- FDC reply error\n");
1394 /* check IC to find cause of interrupt */
1395 switch (ST0
& ST0_INTR
) {
1396 case 0x40: /* error occurred during command execution */
1398 return 0; /* occurs with pseudo-DMA */
1401 DPRINT("Drive is write protected\n");
1402 clear_bit(FD_DISK_WRITABLE_BIT
, &DRS
->flags
);
1405 } else if (ST1
& ST1_ND
) {
1406 set_bit(FD_NEED_TWADDLE_BIT
, &DRS
->flags
);
1407 } else if (ST1
& ST1_OR
) {
1408 if (DP
->flags
& FTD_MSG
)
1409 DPRINT("Over/Underrun - retrying\n");
1411 } else if (*errors
>= DP
->max_errors
.reporting
) {
1414 if (ST2
& ST2_WC
|| ST2
& ST2_BC
)
1415 /* wrong cylinder => recal */
1416 DRS
->track
= NEED_2_RECAL
;
1418 case 0x80: /* invalid command given */
1419 DPRINT("Invalid FDC command given!\n");
1423 DPRINT("Abnormal termination caused by polling\n");
1426 default: /* (0) Normal command termination */
1432 * This routine is called when everything should be correctly set up
1433 * for the transfer (i.e. floppy motor is on, the correct floppy is
1434 * selected, and the head is sitting on the right track).
1436 static void setup_rw_floppy(void)
1442 unsigned long ready_date
;
1443 work_func_t function
;
1445 flags
= raw_cmd
->flags
;
1446 if (flags
& (FD_RAW_READ
| FD_RAW_WRITE
))
1447 flags
|= FD_RAW_INTR
;
1449 if ((flags
& FD_RAW_SPIN
) && !(flags
& FD_RAW_NO_MOTOR
)) {
1450 ready_date
= DRS
->spinup_date
+ DP
->spinup
;
1451 /* If spinup will take a long time, rerun scandrives
1452 * again just before spinup completion. Beware that
1453 * after scandrives, we must again wait for selection.
1455 if (time_after(ready_date
, jiffies
+ DP
->select_delay
)) {
1456 ready_date
-= DP
->select_delay
;
1457 function
= (work_func_t
)floppy_start
;
1459 function
= (work_func_t
)setup_rw_floppy
;
1461 /* wait until the floppy is spinning fast enough */
1462 if (fd_wait_for_completion(ready_date
, function
))
1465 dflags
= DRS
->flags
;
1467 if ((flags
& FD_RAW_READ
) || (flags
& FD_RAW_WRITE
))
1470 if (flags
& FD_RAW_INTR
)
1471 do_floppy
= main_command_interrupt
;
1474 for (i
= 0; i
< raw_cmd
->cmd_count
; i
++)
1475 r
|= output_byte(raw_cmd
->cmd
[i
]);
1477 debugt(__func__
, "rw_command");
1485 if (!(flags
& FD_RAW_INTR
)) {
1488 } else if (flags
& FD_RAW_NEED_DISK
)
1492 static int blind_seek
;
1495 * This is the routine called after every seek (or recalibrate) interrupt
1496 * from the floppy controller.
1498 static void seek_interrupt(void)
1500 debugt(__func__
, "");
1501 if (inr
!= 2 || (ST0
& 0xF8) != 0x20) {
1502 DPRINT("seek failed\n");
1503 DRS
->track
= NEED_2_RECAL
;
1508 if (DRS
->track
>= 0 && DRS
->track
!= ST1
&& !blind_seek
) {
1509 debug_dcl(DP
->flags
,
1510 "clearing NEWCHANGE flag because of effective seek\n");
1511 debug_dcl(DP
->flags
, "jiffies=%lu\n", jiffies
);
1512 clear_bit(FD_DISK_NEWCHANGE_BIT
, &DRS
->flags
);
1513 /* effective seek */
1514 DRS
->select_date
= jiffies
;
1520 static void check_wp(void)
1522 if (test_bit(FD_VERIFY_BIT
, &DRS
->flags
)) {
1523 /* check write protection */
1524 output_byte(FD_GETSTATUS
);
1525 output_byte(UNIT(current_drive
));
1526 if (result() != 1) {
1530 clear_bit(FD_VERIFY_BIT
, &DRS
->flags
);
1531 clear_bit(FD_NEED_TWADDLE_BIT
, &DRS
->flags
);
1532 debug_dcl(DP
->flags
,
1533 "checking whether disk is write protected\n");
1534 debug_dcl(DP
->flags
, "wp=%x\n", ST3
& 0x40);
1536 set_bit(FD_DISK_WRITABLE_BIT
, &DRS
->flags
);
1538 clear_bit(FD_DISK_WRITABLE_BIT
, &DRS
->flags
);
1542 static void seek_floppy(void)
1548 debug_dcl(DP
->flags
, "calling disk change from %s\n", __func__
);
1550 if (!test_bit(FD_DISK_NEWCHANGE_BIT
, &DRS
->flags
) &&
1551 disk_change(current_drive
) && (raw_cmd
->flags
& FD_RAW_NEED_DISK
)) {
1552 /* the media changed flag should be cleared after the seek.
1553 * If it isn't, this means that there is really no disk in
1556 set_bit(FD_DISK_CHANGED_BIT
, &DRS
->flags
);
1561 if (DRS
->track
<= NEED_1_RECAL
) {
1562 recalibrate_floppy();
1564 } else if (test_bit(FD_DISK_NEWCHANGE_BIT
, &DRS
->flags
) &&
1565 (raw_cmd
->flags
& FD_RAW_NEED_DISK
) &&
1566 (DRS
->track
<= NO_TRACK
|| DRS
->track
== raw_cmd
->track
)) {
1567 /* we seek to clear the media-changed condition. Does anybody
1568 * know a more elegant way, which works on all drives? */
1570 track
= raw_cmd
->track
- 1;
1572 if (DP
->flags
& FD_SILENT_DCL_CLEAR
) {
1573 set_dor(fdc
, ~(0x10 << UNIT(current_drive
)), 0);
1575 raw_cmd
->flags
|= FD_RAW_NEED_SEEK
;
1581 if (raw_cmd
->track
!= DRS
->track
&&
1582 (raw_cmd
->flags
& FD_RAW_NEED_SEEK
))
1583 track
= raw_cmd
->track
;
1590 do_floppy
= seek_interrupt
;
1591 output_byte(FD_SEEK
);
1592 output_byte(UNIT(current_drive
));
1593 if (output_byte(track
) < 0) {
1597 debugt(__func__
, "");
1600 static void recal_interrupt(void)
1602 debugt(__func__
, "");
1605 else if (ST0
& ST0_ECE
) {
1606 switch (DRS
->track
) {
1608 debugt(__func__
, "need 1 recal");
1609 /* after a second recalibrate, we still haven't
1610 * reached track 0. Probably no drive. Raise an
1611 * error, as failing immediately might upset
1612 * computers possessed by the Devil :-) */
1617 debugt(__func__
, "need 2 recal");
1618 /* If we already did a recalibrate,
1619 * and we are not at track 0, this
1620 * means we have moved. (The only way
1621 * not to move at recalibration is to
1622 * be already at track 0.) Clear the
1623 * new change flag */
1624 debug_dcl(DP
->flags
,
1625 "clearing NEWCHANGE flag because of second recalibrate\n");
1627 clear_bit(FD_DISK_NEWCHANGE_BIT
, &DRS
->flags
);
1628 DRS
->select_date
= jiffies
;
1631 debugt(__func__
, "default");
1632 /* Recalibrate moves the head by at
1633 * most 80 steps. If after one
1634 * recalibrate we don't have reached
1635 * track 0, this might mean that we
1636 * started beyond track 80. Try
1638 DRS
->track
= NEED_1_RECAL
;
1646 static void print_result(char *message
, int inr
)
1650 DPRINT("%s ", message
);
1652 for (i
= 0; i
< inr
; i
++)
1653 pr_cont("repl[%d]=%x ", i
, reply_buffer
[i
]);
1657 /* interrupt handler. Note that this can be called externally on the Sparc */
1658 irqreturn_t
floppy_interrupt(int irq
, void *dev_id
)
1662 void (*handler
)(void) = do_floppy
;
1664 lasthandler
= handler
;
1665 interruptjiffies
= jiffies
;
1667 f
= claim_dma_lock();
1669 release_dma_lock(f
);
1672 if (fdc
>= N_FDC
|| FDCS
->address
== -1) {
1673 /* we don't even know which FDC is the culprit */
1674 pr_info("DOR0=%x\n", fdc_state
[0].dor
);
1675 pr_info("floppy interrupt on bizarre fdc %d\n", fdc
);
1676 pr_info("handler=%pf\n", handler
);
1677 is_alive(__func__
, "bizarre fdc");
1682 /* We have to clear the reset flag here, because apparently on boxes
1683 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
1684 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
1685 * emission of the SENSEI's.
1686 * It is OK to emit floppy commands because we are in an interrupt
1687 * handler here, and thus we have to fear no interference of other
1691 do_print
= !handler
&& print_unex
&& initialized
;
1695 print_result("unexpected interrupt", inr
);
1699 output_byte(FD_SENSEI
);
1702 print_result("sensei", inr
);
1704 } while ((ST0
& 0x83) != UNIT(current_drive
) &&
1705 inr
== 2 && max_sensei
);
1711 schedule_bh(handler
);
1712 is_alive(__func__
, "normal interrupt end");
1714 /* FIXME! Was it really for us? */
1718 static void recalibrate_floppy(void)
1720 debugt(__func__
, "");
1721 do_floppy
= recal_interrupt
;
1722 output_byte(FD_RECALIBRATE
);
1723 if (output_byte(UNIT(current_drive
)) < 0)
1728 * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1730 static void reset_interrupt(void)
1732 debugt(__func__
, "");
1733 result(); /* get the status ready for set_fdc */
1735 pr_info("reset set in interrupt, calling %pf\n", cont
->error
);
1736 cont
->error(); /* a reset just after a reset. BAD! */
1742 * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1743 * or by setting the self clearing bit 7 of STATUS (newer FDCs)
1745 static void reset_fdc(void)
1747 unsigned long flags
;
1749 do_floppy
= reset_interrupt
;
1753 /* Pseudo-DMA may intercept 'reset finished' interrupt. */
1754 /* Irrelevant for systems with true DMA (i386). */
1756 flags
= claim_dma_lock();
1758 release_dma_lock(flags
);
1760 if (FDCS
->version
>= FDC_82072A
)
1761 fd_outb(0x80 | (FDCS
->dtr
& 3), FD_STATUS
);
1763 fd_outb(FDCS
->dor
& ~0x04, FD_DOR
);
1764 udelay(FD_RESET_DELAY
);
1765 fd_outb(FDCS
->dor
, FD_DOR
);
1769 static void show_floppy(void)
1774 pr_info("floppy driver state\n");
1775 pr_info("-------------------\n");
1776 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%pf\n",
1777 jiffies
, interruptjiffies
, jiffies
- interruptjiffies
,
1780 pr_info("timeout_message=%s\n", timeout_message
);
1781 pr_info("last output bytes:\n");
1782 for (i
= 0; i
< OLOGSIZE
; i
++)
1783 pr_info("%2x %2x %lu\n",
1784 output_log
[(i
+ output_log_pos
) % OLOGSIZE
].data
,
1785 output_log
[(i
+ output_log_pos
) % OLOGSIZE
].status
,
1786 output_log
[(i
+ output_log_pos
) % OLOGSIZE
].jiffies
);
1787 pr_info("last result at %lu\n", resultjiffies
);
1788 pr_info("last redo_fd_request at %lu\n", lastredo
);
1789 print_hex_dump(KERN_INFO
, "", DUMP_PREFIX_NONE
, 16, 1,
1790 reply_buffer
, resultsize
, true);
1792 pr_info("status=%x\n", fd_inb(FD_STATUS
));
1793 pr_info("fdc_busy=%lu\n", fdc_busy
);
1795 pr_info("do_floppy=%pf\n", do_floppy
);
1796 if (work_pending(&floppy_work
))
1797 pr_info("floppy_work.func=%pf\n", floppy_work
.func
);
1798 if (delayed_work_pending(&fd_timer
))
1799 pr_info("delayed work.function=%p expires=%ld\n",
1801 fd_timer
.timer
.expires
- jiffies
);
1802 if (delayed_work_pending(&fd_timeout
))
1803 pr_info("timer_function=%p expires=%ld\n",
1804 fd_timeout
.work
.func
,
1805 fd_timeout
.timer
.expires
- jiffies
);
1807 pr_info("cont=%p\n", cont
);
1808 pr_info("current_req=%p\n", current_req
);
1809 pr_info("command_status=%d\n", command_status
);
1813 static void floppy_shutdown(struct work_struct
*arg
)
1815 unsigned long flags
;
1821 flags
= claim_dma_lock();
1823 release_dma_lock(flags
);
1825 /* avoid dma going to a random drive after shutdown */
1828 DPRINT("floppy timeout called\n");
1832 cont
->redo(); /* this will recall reset when needed */
1834 pr_info("no cont in shutdown!\n");
1835 process_fd_request();
1837 is_alive(__func__
, "");
1840 /* start motor, check media-changed condition and write protection */
1841 static int start_motor(void (*function
)(void))
1847 data
= UNIT(current_drive
);
1848 if (!(raw_cmd
->flags
& FD_RAW_NO_MOTOR
)) {
1849 if (!(FDCS
->dor
& (0x10 << UNIT(current_drive
)))) {
1851 /* no read since this drive is running */
1852 DRS
->first_read_date
= 0;
1853 /* note motor start time if motor is not yet running */
1854 DRS
->spinup_date
= jiffies
;
1855 data
|= (0x10 << UNIT(current_drive
));
1857 } else if (FDCS
->dor
& (0x10 << UNIT(current_drive
)))
1858 mask
&= ~(0x10 << UNIT(current_drive
));
1860 /* starts motor and selects floppy */
1861 del_timer(motor_off_timer
+ current_drive
);
1862 set_dor(fdc
, mask
, data
);
1864 /* wait_for_completion also schedules reset if needed. */
1865 return fd_wait_for_completion(DRS
->select_date
+ DP
->select_delay
,
1866 (work_func_t
)function
);
1869 static void floppy_ready(void)
1875 if (start_motor(floppy_ready
))
1880 debug_dcl(DP
->flags
, "calling disk change from floppy_ready\n");
1881 if (!(raw_cmd
->flags
& FD_RAW_NO_MOTOR
) &&
1882 disk_change(current_drive
) && !DP
->select_delay
)
1883 twaddle(); /* this clears the dcl on certain
1884 * drive/controller combinations */
1886 #ifdef fd_chose_dma_mode
1887 if ((raw_cmd
->flags
& FD_RAW_READ
) || (raw_cmd
->flags
& FD_RAW_WRITE
)) {
1888 unsigned long flags
= claim_dma_lock();
1889 fd_chose_dma_mode(raw_cmd
->kernel_data
, raw_cmd
->length
);
1890 release_dma_lock(flags
);
1894 if (raw_cmd
->flags
& (FD_RAW_NEED_SEEK
| FD_RAW_NEED_DISK
)) {
1895 perpendicular_mode();
1896 fdc_specify(); /* must be done here because of hut, hlt ... */
1899 if ((raw_cmd
->flags
& FD_RAW_READ
) ||
1900 (raw_cmd
->flags
& FD_RAW_WRITE
))
1906 static void floppy_start(void)
1908 reschedule_timeout(current_reqD
, "floppy start");
1911 debug_dcl(DP
->flags
, "setting NEWCHANGE in floppy_start\n");
1912 set_bit(FD_DISK_NEWCHANGE_BIT
, &DRS
->flags
);
1917 * ========================================================================
1918 * here ends the bottom half. Exported routines are:
1919 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
1920 * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
1921 * Initialization also uses output_byte, result, set_dor, floppy_interrupt
1923 * ========================================================================
1926 * General purpose continuations.
1927 * ==============================
1930 static void do_wakeup(void)
1932 reschedule_timeout(MAXTIMEOUT
, "do wakeup");
1934 command_status
+= 2;
1935 wake_up(&command_done
);
1938 static const struct cont_t wakeup_cont
= {
1942 .done
= (done_f
)empty
1945 static const struct cont_t intr_cont
= {
1947 .redo
= process_fd_request
,
1949 .done
= (done_f
)empty
1952 static int wait_til_done(void (*handler
)(void), bool interruptible
)
1956 schedule_bh(handler
);
1959 wait_event_interruptible(command_done
, command_status
>= 2);
1961 wait_event(command_done
, command_status
>= 2);
1963 if (command_status
< 2) {
1971 command_status
= FD_COMMAND_ERROR
;
1972 if (command_status
== FD_COMMAND_OKAY
)
1976 command_status
= FD_COMMAND_NONE
;
1980 static void generic_done(int result
)
1982 command_status
= result
;
1983 cont
= &wakeup_cont
;
1986 static void generic_success(void)
1991 static void generic_failure(void)
1996 static void success_and_wakeup(void)
2003 * formatting and rw support.
2004 * ==========================
2007 static int next_valid_format(void)
2011 probed_format
= DRS
->probed_format
;
2013 if (probed_format
>= 8 || !DP
->autodetect
[probed_format
]) {
2014 DRS
->probed_format
= 0;
2017 if (floppy_type
[DP
->autodetect
[probed_format
]].sect
) {
2018 DRS
->probed_format
= probed_format
;
2025 static void bad_flp_intr(void)
2030 DRS
->probed_format
++;
2031 if (!next_valid_format())
2034 err_count
= ++(*errors
);
2035 INFBOUND(DRWE
->badness
, err_count
);
2036 if (err_count
> DP
->max_errors
.abort
)
2038 if (err_count
> DP
->max_errors
.reset
)
2040 else if (err_count
> DP
->max_errors
.recal
)
2041 DRS
->track
= NEED_2_RECAL
;
2044 static void set_floppy(int drive
)
2046 int type
= ITYPE(UDRS
->fd_device
);
2049 _floppy
= floppy_type
+ type
;
2051 _floppy
= current_type
[drive
];
2055 * formatting support.
2056 * ===================
2058 static void format_interrupt(void)
2060 switch (interpret_errors()) {
2071 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1))
2072 #define CT(x) ((x) | 0xc0)
2074 static void setup_format_params(int track
)
2082 unsigned char track
, head
, sect
, size
;
2083 } *here
= (struct fparm
*)floppy_track_buffer
;
2085 raw_cmd
= &default_raw_cmd
;
2086 raw_cmd
->track
= track
;
2088 raw_cmd
->flags
= (FD_RAW_WRITE
| FD_RAW_INTR
| FD_RAW_SPIN
|
2089 FD_RAW_NEED_DISK
| FD_RAW_NEED_SEEK
);
2090 raw_cmd
->rate
= _floppy
->rate
& 0x43;
2091 raw_cmd
->cmd_count
= NR_F
;
2092 COMMAND
= FM_MODE(_floppy
, FD_FORMAT
);
2093 DR_SELECT
= UNIT(current_drive
) + PH_HEAD(_floppy
, format_req
.head
);
2094 F_SIZECODE
= FD_SIZECODE(_floppy
);
2095 F_SECT_PER_TRACK
= _floppy
->sect
<< 2 >> F_SIZECODE
;
2096 F_GAP
= _floppy
->fmt_gap
;
2097 F_FILL
= FD_FILL_BYTE
;
2099 raw_cmd
->kernel_data
= floppy_track_buffer
;
2100 raw_cmd
->length
= 4 * F_SECT_PER_TRACK
;
2102 /* allow for about 30ms for data transport per track */
2103 head_shift
= (F_SECT_PER_TRACK
+ 5) / 6;
2105 /* a ``cylinder'' is two tracks plus a little stepping time */
2106 track_shift
= 2 * head_shift
+ 3;
2108 /* position of logical sector 1 on this track */
2109 n
= (track_shift
* format_req
.track
+ head_shift
* format_req
.head
)
2112 /* determine interleave */
2114 if (_floppy
->fmt_gap
< 0x22)
2117 /* initialize field */
2118 for (count
= 0; count
< F_SECT_PER_TRACK
; ++count
) {
2119 here
[count
].track
= format_req
.track
;
2120 here
[count
].head
= format_req
.head
;
2121 here
[count
].sect
= 0;
2122 here
[count
].size
= F_SIZECODE
;
2124 /* place logical sectors */
2125 for (count
= 1; count
<= F_SECT_PER_TRACK
; ++count
) {
2126 here
[n
].sect
= count
;
2127 n
= (n
+ il
) % F_SECT_PER_TRACK
;
2128 if (here
[n
].sect
) { /* sector busy, find next free sector */
2130 if (n
>= F_SECT_PER_TRACK
) {
2131 n
-= F_SECT_PER_TRACK
;
2132 while (here
[n
].sect
)
2137 if (_floppy
->stretch
& FD_SECTBASEMASK
) {
2138 for (count
= 0; count
< F_SECT_PER_TRACK
; count
++)
2139 here
[count
].sect
+= FD_SECTBASE(_floppy
) - 1;
2143 static void redo_format(void)
2146 setup_format_params(format_req
.track
<< STRETCH(_floppy
));
2148 debugt(__func__
, "queue format request");
2151 static const struct cont_t format_cont
= {
2152 .interrupt
= format_interrupt
,
2153 .redo
= redo_format
,
2154 .error
= bad_flp_intr
,
2155 .done
= generic_done
2158 static int do_format(int drive
, struct format_descr
*tmp_format_req
)
2162 if (lock_fdc(drive
, true))
2167 _floppy
->track
> DP
->tracks
||
2168 tmp_format_req
->track
>= _floppy
->track
||
2169 tmp_format_req
->head
>= _floppy
->head
||
2170 (_floppy
->sect
<< 2) % (1 << FD_SIZECODE(_floppy
)) ||
2171 !_floppy
->fmt_gap
) {
2172 process_fd_request();
2175 format_req
= *tmp_format_req
;
2177 cont
= &format_cont
;
2178 errors
= &format_errors
;
2179 ret
= wait_til_done(redo_format
, true);
2182 process_fd_request();
2187 * Buffer read/write and support
2188 * =============================
2191 static void floppy_end_request(struct request
*req
, int error
)
2193 unsigned int nr_sectors
= current_count_sectors
;
2194 unsigned int drive
= (unsigned long)req
->rq_disk
->private_data
;
2196 /* current_count_sectors can be zero if transfer failed */
2198 nr_sectors
= blk_rq_cur_sectors(req
);
2199 if (__blk_end_request(req
, error
, nr_sectors
<< 9))
2202 /* We're done with the request */
2207 /* new request_done. Can handle physical sectors which are smaller than a
2209 static void request_done(int uptodate
)
2211 struct request
*req
= current_req
;
2212 struct request_queue
*q
;
2213 unsigned long flags
;
2215 char msg
[sizeof("request done ") + sizeof(int) * 3];
2218 snprintf(msg
, sizeof(msg
), "request done %d", uptodate
);
2219 reschedule_timeout(MAXTIMEOUT
, msg
);
2222 pr_info("floppy.c: no request in request_done\n");
2229 /* maintain values for invalidation on geometry
2231 block
= current_count_sectors
+ blk_rq_pos(req
);
2232 INFBOUND(DRS
->maxblock
, block
);
2233 if (block
> _floppy
->sect
)
2236 /* unlock chained buffers */
2237 spin_lock_irqsave(q
->queue_lock
, flags
);
2238 floppy_end_request(req
, 0);
2239 spin_unlock_irqrestore(q
->queue_lock
, flags
);
2241 if (rq_data_dir(req
) == WRITE
) {
2242 /* record write error information */
2243 DRWE
->write_errors
++;
2244 if (DRWE
->write_errors
== 1) {
2245 DRWE
->first_error_sector
= blk_rq_pos(req
);
2246 DRWE
->first_error_generation
= DRS
->generation
;
2248 DRWE
->last_error_sector
= blk_rq_pos(req
);
2249 DRWE
->last_error_generation
= DRS
->generation
;
2251 spin_lock_irqsave(q
->queue_lock
, flags
);
2252 floppy_end_request(req
, -EIO
);
2253 spin_unlock_irqrestore(q
->queue_lock
, flags
);
2257 /* Interrupt handler evaluating the result of the r/w operation */
2258 static void rw_interrupt(void)
2266 /* some Toshiba floppy controllers occasionnally seem to
2267 * return bogus interrupts after read/write operations, which
2268 * can be recognized by a bad head number (>= 2) */
2272 if (!DRS
->first_read_date
)
2273 DRS
->first_read_date
= jiffies
;
2276 ssize
= DIV_ROUND_UP(1 << SIZECODE
, 4);
2288 nr_sectors
= (((R_TRACK
- TRACK
) * heads
+
2289 R_HEAD
- HEAD
) * SECT_PER_TRACK
+
2290 R_SECTOR
- SECTOR
+ eoc
) << SIZECODE
>> 2;
2292 if (nr_sectors
/ ssize
>
2293 DIV_ROUND_UP(in_sector_offset
+ current_count_sectors
, ssize
)) {
2294 DPRINT("long rw: %x instead of %lx\n",
2295 nr_sectors
, current_count_sectors
);
2296 pr_info("rs=%d s=%d\n", R_SECTOR
, SECTOR
);
2297 pr_info("rh=%d h=%d\n", R_HEAD
, HEAD
);
2298 pr_info("rt=%d t=%d\n", R_TRACK
, TRACK
);
2299 pr_info("heads=%d eoc=%d\n", heads
, eoc
);
2300 pr_info("spt=%d st=%d ss=%d\n",
2301 SECT_PER_TRACK
, fsector_t
, ssize
);
2302 pr_info("in_sector_offset=%d\n", in_sector_offset
);
2305 nr_sectors
-= in_sector_offset
;
2306 INFBOUND(nr_sectors
, 0);
2307 SUPBOUND(current_count_sectors
, nr_sectors
);
2309 switch (interpret_errors()) {
2314 if (!current_count_sectors
) {
2321 if (!current_count_sectors
) {
2325 current_type
[current_drive
] = _floppy
;
2326 floppy_sizes
[TOMINOR(current_drive
)] = _floppy
->size
;
2331 if (DP
->flags
& FTD_MSG
)
2332 DPRINT("Auto-detected floppy type %s in fd%d\n",
2333 _floppy
->name
, current_drive
);
2334 current_type
[current_drive
] = _floppy
;
2335 floppy_sizes
[TOMINOR(current_drive
)] = _floppy
->size
;
2339 if (CT(COMMAND
) != FD_READ
||
2340 raw_cmd
->kernel_data
== current_req
->buffer
) {
2341 /* transfer directly from buffer */
2343 } else if (CT(COMMAND
) == FD_READ
) {
2344 buffer_track
= raw_cmd
->track
;
2345 buffer_drive
= current_drive
;
2346 INFBOUND(buffer_max
, nr_sectors
+ fsector_t
);
2351 /* Compute maximal contiguous buffer size. */
2352 static int buffer_chain_size(void)
2356 struct req_iterator iter
;
2359 base
= bio_data(current_req
->bio
);
2362 rq_for_each_segment(bv
, current_req
, iter
) {
2363 if (page_address(bv
->bv_page
) + bv
->bv_offset
!= base
+ size
)
2372 /* Compute the maximal transfer size */
2373 static int transfer_size(int ssize
, int max_sector
, int max_size
)
2375 SUPBOUND(max_sector
, fsector_t
+ max_size
);
2378 max_sector
-= (max_sector
% _floppy
->sect
) % ssize
;
2380 /* transfer size, beginning not aligned */
2381 current_count_sectors
= max_sector
- fsector_t
;
2387 * Move data from/to the track buffer to/from the buffer cache.
2389 static void copy_buffer(int ssize
, int max_sector
, int max_sector_2
)
2391 int remaining
; /* number of transferred 512-byte sectors */
2396 struct req_iterator iter
;
2398 max_sector
= transfer_size(ssize
,
2399 min(max_sector
, max_sector_2
),
2400 blk_rq_sectors(current_req
));
2402 if (current_count_sectors
<= 0 && CT(COMMAND
) == FD_WRITE
&&
2403 buffer_max
> fsector_t
+ blk_rq_sectors(current_req
))
2404 current_count_sectors
= min_t(int, buffer_max
- fsector_t
,
2405 blk_rq_sectors(current_req
));
2407 remaining
= current_count_sectors
<< 9;
2408 if (remaining
> blk_rq_bytes(current_req
) && CT(COMMAND
) == FD_WRITE
) {
2409 DPRINT("in copy buffer\n");
2410 pr_info("current_count_sectors=%ld\n", current_count_sectors
);
2411 pr_info("remaining=%d\n", remaining
>> 9);
2412 pr_info("current_req->nr_sectors=%u\n",
2413 blk_rq_sectors(current_req
));
2414 pr_info("current_req->current_nr_sectors=%u\n",
2415 blk_rq_cur_sectors(current_req
));
2416 pr_info("max_sector=%d\n", max_sector
);
2417 pr_info("ssize=%d\n", ssize
);
2420 buffer_max
= max(max_sector
, buffer_max
);
2422 dma_buffer
= floppy_track_buffer
+ ((fsector_t
- buffer_min
) << 9);
2424 size
= blk_rq_cur_bytes(current_req
);
2426 rq_for_each_segment(bv
, current_req
, iter
) {
2431 SUPBOUND(size
, remaining
);
2433 buffer
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2434 if (dma_buffer
+ size
>
2435 floppy_track_buffer
+ (max_buffer_sectors
<< 10) ||
2436 dma_buffer
< floppy_track_buffer
) {
2437 DPRINT("buffer overrun in copy buffer %d\n",
2438 (int)((floppy_track_buffer
- dma_buffer
) >> 9));
2439 pr_info("fsector_t=%d buffer_min=%d\n",
2440 fsector_t
, buffer_min
);
2441 pr_info("current_count_sectors=%ld\n",
2442 current_count_sectors
);
2443 if (CT(COMMAND
) == FD_READ
)
2445 if (CT(COMMAND
) == FD_WRITE
)
2449 if (((unsigned long)buffer
) % 512)
2450 DPRINT("%p buffer not aligned\n", buffer
);
2452 if (CT(COMMAND
) == FD_READ
)
2453 memcpy(buffer
, dma_buffer
, size
);
2455 memcpy(dma_buffer
, buffer
, size
);
2462 max_sector
-= remaining
>> 9;
2463 DPRINT("weirdness: remaining %d\n", remaining
>> 9);
2467 /* work around a bug in pseudo DMA
2468 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2469 * sending data. Hence we need a different way to signal the
2470 * transfer length: We use SECT_PER_TRACK. Unfortunately, this
2471 * does not work with MT, hence we can only transfer one head at
2474 static void virtualdmabug_workaround(void)
2479 if (CT(COMMAND
) == FD_WRITE
) {
2480 COMMAND
&= ~0x80; /* switch off multiple track mode */
2482 hard_sectors
= raw_cmd
->length
>> (7 + SIZECODE
);
2483 end_sector
= SECTOR
+ hard_sectors
- 1;
2484 if (end_sector
> SECT_PER_TRACK
) {
2485 pr_info("too many sectors %d > %d\n",
2486 end_sector
, SECT_PER_TRACK
);
2489 SECT_PER_TRACK
= end_sector
;
2490 /* make sure SECT_PER_TRACK
2491 * points to end of transfer */
2496 * Formulate a read/write request.
2497 * this routine decides where to load the data (directly to buffer, or to
2498 * tmp floppy area), how much data to load (the size of the buffer, the whole
2499 * track, or a single sector)
2500 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2501 * allocation on the fly, it should be done here. No other part should need
2505 static int make_raw_rw_request(void)
2507 int aligned_sector_t
;
2513 if (WARN(max_buffer_sectors
== 0, "VFS: Block I/O scheduled on unopened device\n"))
2516 set_fdc((long)current_req
->rq_disk
->private_data
);
2518 raw_cmd
= &default_raw_cmd
;
2519 raw_cmd
->flags
= FD_RAW_SPIN
| FD_RAW_NEED_DISK
| FD_RAW_NEED_SEEK
;
2520 raw_cmd
->cmd_count
= NR_RW
;
2521 if (rq_data_dir(current_req
) == READ
) {
2522 raw_cmd
->flags
|= FD_RAW_READ
;
2523 COMMAND
= FM_MODE(_floppy
, FD_READ
);
2524 } else if (rq_data_dir(current_req
) == WRITE
) {
2525 raw_cmd
->flags
|= FD_RAW_WRITE
;
2526 COMMAND
= FM_MODE(_floppy
, FD_WRITE
);
2528 DPRINT("%s: unknown command\n", __func__
);
2532 max_sector
= _floppy
->sect
* _floppy
->head
;
2534 TRACK
= (int)blk_rq_pos(current_req
) / max_sector
;
2535 fsector_t
= (int)blk_rq_pos(current_req
) % max_sector
;
2536 if (_floppy
->track
&& TRACK
>= _floppy
->track
) {
2537 if (blk_rq_cur_sectors(current_req
) & 1) {
2538 current_count_sectors
= 1;
2543 HEAD
= fsector_t
/ _floppy
->sect
;
2545 if (((_floppy
->stretch
& (FD_SWAPSIDES
| FD_SECTBASEMASK
)) ||
2546 test_bit(FD_NEED_TWADDLE_BIT
, &DRS
->flags
)) &&
2547 fsector_t
< _floppy
->sect
)
2548 max_sector
= _floppy
->sect
;
2550 /* 2M disks have phantom sectors on the first track */
2551 if ((_floppy
->rate
& FD_2M
) && (!TRACK
) && (!HEAD
)) {
2552 max_sector
= 2 * _floppy
->sect
/ 3;
2553 if (fsector_t
>= max_sector
) {
2554 current_count_sectors
=
2555 min_t(int, _floppy
->sect
- fsector_t
,
2556 blk_rq_sectors(current_req
));
2561 SIZECODE
= FD_SIZECODE(_floppy
);
2562 raw_cmd
->rate
= _floppy
->rate
& 0x43;
2563 if ((_floppy
->rate
& FD_2M
) && (TRACK
|| HEAD
) && raw_cmd
->rate
== 2)
2570 raw_cmd
->track
= TRACK
<< STRETCH(_floppy
);
2571 DR_SELECT
= UNIT(current_drive
) + PH_HEAD(_floppy
, HEAD
);
2573 ssize
= DIV_ROUND_UP(1 << SIZECODE
, 4);
2574 SECT_PER_TRACK
= _floppy
->sect
<< 2 >> SIZECODE
;
2575 SECTOR
= ((fsector_t
% _floppy
->sect
) << 2 >> SIZECODE
) +
2576 FD_SECTBASE(_floppy
);
2578 /* tracksize describes the size which can be filled up with sectors
2581 tracksize
= _floppy
->sect
- _floppy
->sect
% ssize
;
2582 if (tracksize
< _floppy
->sect
) {
2584 if (tracksize
<= fsector_t
% _floppy
->sect
)
2587 /* if we are beyond tracksize, fill up using smaller sectors */
2588 while (tracksize
<= fsector_t
% _floppy
->sect
) {
2589 while (tracksize
+ ssize
> _floppy
->sect
) {
2597 max_sector
= HEAD
* _floppy
->sect
+ tracksize
;
2598 } else if (!TRACK
&& !HEAD
&& !(_floppy
->rate
& FD_2M
) && probing
) {
2599 max_sector
= _floppy
->sect
;
2600 } else if (!HEAD
&& CT(COMMAND
) == FD_WRITE
) {
2601 /* for virtual DMA bug workaround */
2602 max_sector
= _floppy
->sect
;
2605 in_sector_offset
= (fsector_t
% _floppy
->sect
) % ssize
;
2606 aligned_sector_t
= fsector_t
- in_sector_offset
;
2607 max_size
= blk_rq_sectors(current_req
);
2608 if ((raw_cmd
->track
== buffer_track
) &&
2609 (current_drive
== buffer_drive
) &&
2610 (fsector_t
>= buffer_min
) && (fsector_t
< buffer_max
)) {
2611 /* data already in track buffer */
2612 if (CT(COMMAND
) == FD_READ
) {
2613 copy_buffer(1, max_sector
, buffer_max
);
2616 } else if (in_sector_offset
|| blk_rq_sectors(current_req
) < ssize
) {
2617 if (CT(COMMAND
) == FD_WRITE
) {
2618 unsigned int sectors
;
2620 sectors
= fsector_t
+ blk_rq_sectors(current_req
);
2621 if (sectors
> ssize
&& sectors
< ssize
+ ssize
)
2622 max_size
= ssize
+ ssize
;
2626 raw_cmd
->flags
&= ~FD_RAW_WRITE
;
2627 raw_cmd
->flags
|= FD_RAW_READ
;
2628 COMMAND
= FM_MODE(_floppy
, FD_READ
);
2629 } else if ((unsigned long)current_req
->buffer
< MAX_DMA_ADDRESS
) {
2630 unsigned long dma_limit
;
2631 int direct
, indirect
;
2634 transfer_size(ssize
, max_sector
,
2635 max_buffer_sectors
* 2) - fsector_t
;
2638 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2639 * on a 64 bit machine!
2641 max_size
= buffer_chain_size();
2642 dma_limit
= (MAX_DMA_ADDRESS
-
2643 ((unsigned long)current_req
->buffer
)) >> 9;
2644 if ((unsigned long)max_size
> dma_limit
)
2645 max_size
= dma_limit
;
2646 /* 64 kb boundaries */
2647 if (CROSS_64KB(current_req
->buffer
, max_size
<< 9))
2649 ((unsigned long)current_req
->buffer
) %
2651 direct
= transfer_size(ssize
, max_sector
, max_size
) - fsector_t
;
2653 * We try to read tracks, but if we get too many errors, we
2654 * go back to reading just one sector at a time.
2656 * This means we should be able to read a sector even if there
2657 * are other bad sectors on this track.
2660 (indirect
* 2 > direct
* 3 &&
2661 *errors
< DP
->max_errors
.read_track
&&
2663 (DP
->read_track
& (1 << DRS
->probed_format
)))))) {
2664 max_size
= blk_rq_sectors(current_req
);
2666 raw_cmd
->kernel_data
= current_req
->buffer
;
2667 raw_cmd
->length
= current_count_sectors
<< 9;
2668 if (raw_cmd
->length
== 0) {
2669 DPRINT("%s: zero dma transfer attempted\n", __func__
);
2670 DPRINT("indirect=%d direct=%d fsector_t=%d\n",
2671 indirect
, direct
, fsector_t
);
2674 virtualdmabug_workaround();
2679 if (CT(COMMAND
) == FD_READ
)
2680 max_size
= max_sector
; /* unbounded */
2682 /* claim buffer track if needed */
2683 if (buffer_track
!= raw_cmd
->track
|| /* bad track */
2684 buffer_drive
!= current_drive
|| /* bad drive */
2685 fsector_t
> buffer_max
||
2686 fsector_t
< buffer_min
||
2687 ((CT(COMMAND
) == FD_READ
||
2688 (!in_sector_offset
&& blk_rq_sectors(current_req
) >= ssize
)) &&
2689 max_sector
> 2 * max_buffer_sectors
+ buffer_min
&&
2690 max_size
+ fsector_t
> 2 * max_buffer_sectors
+ buffer_min
)) {
2691 /* not enough space */
2693 buffer_drive
= current_drive
;
2694 buffer_max
= buffer_min
= aligned_sector_t
;
2696 raw_cmd
->kernel_data
= floppy_track_buffer
+
2697 ((aligned_sector_t
- buffer_min
) << 9);
2699 if (CT(COMMAND
) == FD_WRITE
) {
2700 /* copy write buffer to track buffer.
2701 * if we get here, we know that the write
2702 * is either aligned or the data already in the buffer
2703 * (buffer will be overwritten) */
2704 if (in_sector_offset
&& buffer_track
== -1)
2705 DPRINT("internal error offset !=0 on write\n");
2706 buffer_track
= raw_cmd
->track
;
2707 buffer_drive
= current_drive
;
2708 copy_buffer(ssize
, max_sector
,
2709 2 * max_buffer_sectors
+ buffer_min
);
2711 transfer_size(ssize
, max_sector
,
2712 2 * max_buffer_sectors
+ buffer_min
-
2715 /* round up current_count_sectors to get dma xfer size */
2716 raw_cmd
->length
= in_sector_offset
+ current_count_sectors
;
2717 raw_cmd
->length
= ((raw_cmd
->length
- 1) | (ssize
- 1)) + 1;
2718 raw_cmd
->length
<<= 9;
2719 if ((raw_cmd
->length
< current_count_sectors
<< 9) ||
2720 (raw_cmd
->kernel_data
!= current_req
->buffer
&&
2721 CT(COMMAND
) == FD_WRITE
&&
2722 (aligned_sector_t
+ (raw_cmd
->length
>> 9) > buffer_max
||
2723 aligned_sector_t
< buffer_min
)) ||
2724 raw_cmd
->length
% (128 << SIZECODE
) ||
2725 raw_cmd
->length
<= 0 || current_count_sectors
<= 0) {
2726 DPRINT("fractionary current count b=%lx s=%lx\n",
2727 raw_cmd
->length
, current_count_sectors
);
2728 if (raw_cmd
->kernel_data
!= current_req
->buffer
)
2729 pr_info("addr=%d, length=%ld\n",
2730 (int)((raw_cmd
->kernel_data
-
2731 floppy_track_buffer
) >> 9),
2732 current_count_sectors
);
2733 pr_info("st=%d ast=%d mse=%d msi=%d\n",
2734 fsector_t
, aligned_sector_t
, max_sector
, max_size
);
2735 pr_info("ssize=%x SIZECODE=%d\n", ssize
, SIZECODE
);
2736 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2737 COMMAND
, SECTOR
, HEAD
, TRACK
);
2738 pr_info("buffer drive=%d\n", buffer_drive
);
2739 pr_info("buffer track=%d\n", buffer_track
);
2740 pr_info("buffer_min=%d\n", buffer_min
);
2741 pr_info("buffer_max=%d\n", buffer_max
);
2745 if (raw_cmd
->kernel_data
!= current_req
->buffer
) {
2746 if (raw_cmd
->kernel_data
< floppy_track_buffer
||
2747 current_count_sectors
< 0 ||
2748 raw_cmd
->length
< 0 ||
2749 raw_cmd
->kernel_data
+ raw_cmd
->length
>
2750 floppy_track_buffer
+ (max_buffer_sectors
<< 10)) {
2751 DPRINT("buffer overrun in schedule dma\n");
2752 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n",
2753 fsector_t
, buffer_min
, raw_cmd
->length
>> 9);
2754 pr_info("current_count_sectors=%ld\n",
2755 current_count_sectors
);
2756 if (CT(COMMAND
) == FD_READ
)
2758 if (CT(COMMAND
) == FD_WRITE
)
2762 } else if (raw_cmd
->length
> blk_rq_bytes(current_req
) ||
2763 current_count_sectors
> blk_rq_sectors(current_req
)) {
2764 DPRINT("buffer overrun in direct transfer\n");
2766 } else if (raw_cmd
->length
< current_count_sectors
<< 9) {
2767 DPRINT("more sectors than bytes\n");
2768 pr_info("bytes=%ld\n", raw_cmd
->length
>> 9);
2769 pr_info("sectors=%ld\n", current_count_sectors
);
2771 if (raw_cmd
->length
== 0) {
2772 DPRINT("zero dma transfer attempted from make_raw_request\n");
2776 virtualdmabug_workaround();
2781 * Round-robin between our available drives, doing one request from each
2783 static int set_next_request(void)
2785 struct request_queue
*q
;
2786 int old_pos
= fdc_queue
;
2789 q
= disks
[fdc_queue
]->queue
;
2790 if (++fdc_queue
== N_DRIVE
)
2793 current_req
= blk_fetch_request(q
);
2797 } while (fdc_queue
!= old_pos
);
2799 return current_req
!= NULL
;
2802 static void redo_fd_request(void)
2808 if (current_drive
< N_DRIVE
)
2809 floppy_off(current_drive
);
2815 spin_lock_irq(&floppy_lock
);
2816 pending
= set_next_request();
2817 spin_unlock_irq(&floppy_lock
);
2824 drive
= (long)current_req
->rq_disk
->private_data
;
2826 reschedule_timeout(current_reqD
, "redo fd request");
2829 raw_cmd
= &default_raw_cmd
;
2831 if (start_motor(redo_fd_request
))
2834 disk_change(current_drive
);
2835 if (test_bit(current_drive
, &fake_change
) ||
2836 test_bit(FD_DISK_CHANGED_BIT
, &DRS
->flags
)) {
2837 DPRINT("disk absent or changed during operation\n");
2841 if (!_floppy
) { /* Autodetection */
2843 DRS
->probed_format
= 0;
2844 if (next_valid_format()) {
2845 DPRINT("no autodetectable formats\n");
2852 _floppy
= floppy_type
+ DP
->autodetect
[DRS
->probed_format
];
2855 errors
= &(current_req
->errors
);
2856 tmp
= make_raw_rw_request();
2862 if (test_bit(FD_NEED_TWADDLE_BIT
, &DRS
->flags
))
2864 schedule_bh(floppy_start
);
2865 debugt(__func__
, "queue fd request");
2869 static const struct cont_t rw_cont
= {
2870 .interrupt
= rw_interrupt
,
2871 .redo
= redo_fd_request
,
2872 .error
= bad_flp_intr
,
2873 .done
= request_done
2876 static void process_fd_request(void)
2879 schedule_bh(redo_fd_request
);
2882 static void do_fd_request(struct request_queue
*q
)
2884 if (WARN(max_buffer_sectors
== 0,
2885 "VFS: %s called on non-open device\n", __func__
))
2888 if (WARN(atomic_read(&usage_count
) == 0,
2889 "warning: usage count=0, current_req=%p sect=%ld type=%x flags=%x\n",
2890 current_req
, (long)blk_rq_pos(current_req
), current_req
->cmd_type
,
2891 current_req
->cmd_flags
))
2894 if (test_and_set_bit(0, &fdc_busy
)) {
2895 /* fdc busy, this new request will be treated when the
2896 current one is done */
2897 is_alive(__func__
, "old request running");
2900 command_status
= FD_COMMAND_NONE
;
2901 __reschedule_timeout(MAXTIMEOUT
, "fd_request");
2903 process_fd_request();
2904 is_alive(__func__
, "");
2907 static const struct cont_t poll_cont
= {
2908 .interrupt
= success_and_wakeup
,
2909 .redo
= floppy_ready
,
2910 .error
= generic_failure
,
2911 .done
= generic_done
2914 static int poll_drive(bool interruptible
, int flag
)
2916 /* no auto-sense, just clear dcl */
2917 raw_cmd
= &default_raw_cmd
;
2918 raw_cmd
->flags
= flag
;
2920 raw_cmd
->cmd_count
= 0;
2922 debug_dcl(DP
->flags
, "setting NEWCHANGE in poll_drive\n");
2923 set_bit(FD_DISK_NEWCHANGE_BIT
, &DRS
->flags
);
2925 return wait_til_done(floppy_ready
, interruptible
);
2929 * User triggered reset
2930 * ====================
2933 static void reset_intr(void)
2935 pr_info("weird, reset interrupt called\n");
2938 static const struct cont_t reset_cont
= {
2939 .interrupt
= reset_intr
,
2940 .redo
= success_and_wakeup
,
2941 .error
= generic_failure
,
2942 .done
= generic_done
2945 static int user_reset_fdc(int drive
, int arg
, bool interruptible
)
2949 if (lock_fdc(drive
, interruptible
))
2952 if (arg
== FD_RESET_ALWAYS
)
2956 ret
= wait_til_done(reset_fdc
, interruptible
);
2960 process_fd_request();
2965 * Misc Ioctl's and support
2966 * ========================
2968 static inline int fd_copyout(void __user
*param
, const void *address
,
2971 return copy_to_user(param
, address
, size
) ? -EFAULT
: 0;
2974 static inline int fd_copyin(void __user
*param
, void *address
,
2977 return copy_from_user(address
, param
, size
) ? -EFAULT
: 0;
2980 static const char *drive_name(int type
, int drive
)
2982 struct floppy_struct
*floppy
;
2985 floppy
= floppy_type
+ type
;
2987 if (UDP
->native_format
)
2988 floppy
= floppy_type
+ UDP
->native_format
;
2993 return floppy
->name
;
2999 static void raw_cmd_done(int flag
)
3004 raw_cmd
->flags
|= FD_RAW_FAILURE
;
3005 raw_cmd
->flags
|= FD_RAW_HARDFAILURE
;
3007 raw_cmd
->reply_count
= inr
;
3008 if (raw_cmd
->reply_count
> MAX_REPLIES
)
3009 raw_cmd
->reply_count
= 0;
3010 for (i
= 0; i
< raw_cmd
->reply_count
; i
++)
3011 raw_cmd
->reply
[i
] = reply_buffer
[i
];
3013 if (raw_cmd
->flags
& (FD_RAW_READ
| FD_RAW_WRITE
)) {
3014 unsigned long flags
;
3015 flags
= claim_dma_lock();
3016 raw_cmd
->length
= fd_get_dma_residue();
3017 release_dma_lock(flags
);
3020 if ((raw_cmd
->flags
& FD_RAW_SOFTFAILURE
) &&
3021 (!raw_cmd
->reply_count
|| (raw_cmd
->reply
[0] & 0xc0)))
3022 raw_cmd
->flags
|= FD_RAW_FAILURE
;
3024 if (disk_change(current_drive
))
3025 raw_cmd
->flags
|= FD_RAW_DISK_CHANGE
;
3027 raw_cmd
->flags
&= ~FD_RAW_DISK_CHANGE
;
3028 if (raw_cmd
->flags
& FD_RAW_NO_MOTOR_AFTER
)
3029 motor_off_callback(current_drive
);
3031 if (raw_cmd
->next
&&
3032 (!(raw_cmd
->flags
& FD_RAW_FAILURE
) ||
3033 !(raw_cmd
->flags
& FD_RAW_STOP_IF_FAILURE
)) &&
3034 ((raw_cmd
->flags
& FD_RAW_FAILURE
) ||
3035 !(raw_cmd
->flags
& FD_RAW_STOP_IF_SUCCESS
))) {
3036 raw_cmd
= raw_cmd
->next
;
3043 static const struct cont_t raw_cmd_cont
= {
3044 .interrupt
= success_and_wakeup
,
3045 .redo
= floppy_start
,
3046 .error
= generic_failure
,
3047 .done
= raw_cmd_done
3050 static int raw_cmd_copyout(int cmd
, void __user
*param
,
3051 struct floppy_raw_cmd
*ptr
)
3056 struct floppy_raw_cmd cmd
= *ptr
;
3058 cmd
.kernel_data
= NULL
;
3059 ret
= copy_to_user(param
, &cmd
, sizeof(cmd
));
3062 param
+= sizeof(struct floppy_raw_cmd
);
3063 if ((ptr
->flags
& FD_RAW_READ
) && ptr
->buffer_length
) {
3064 if (ptr
->length
>= 0 &&
3065 ptr
->length
<= ptr
->buffer_length
) {
3066 long length
= ptr
->buffer_length
- ptr
->length
;
3067 ret
= fd_copyout(ptr
->data
, ptr
->kernel_data
,
3079 static void raw_cmd_free(struct floppy_raw_cmd
**ptr
)
3081 struct floppy_raw_cmd
*next
;
3082 struct floppy_raw_cmd
*this;
3087 if (this->buffer_length
) {
3088 fd_dma_mem_free((unsigned long)this->kernel_data
,
3089 this->buffer_length
);
3090 this->buffer_length
= 0;
3098 static int raw_cmd_copyin(int cmd
, void __user
*param
,
3099 struct floppy_raw_cmd
**rcmd
)
3101 struct floppy_raw_cmd
*ptr
;
3108 ptr
= kmalloc(sizeof(struct floppy_raw_cmd
), GFP_USER
);
3112 ret
= copy_from_user(ptr
, param
, sizeof(*ptr
));
3114 ptr
->buffer_length
= 0;
3115 ptr
->kernel_data
= NULL
;
3118 param
+= sizeof(struct floppy_raw_cmd
);
3119 if (ptr
->cmd_count
> 33)
3120 /* the command may now also take up the space
3121 * initially intended for the reply & the
3122 * reply count. Needed for long 82078 commands
3123 * such as RESTORE, which takes ... 17 command
3124 * bytes. Murphy's law #137: When you reserve
3125 * 16 bytes for a structure, you'll one day
3126 * discover that you really need 17...
3130 for (i
= 0; i
< 16; i
++)
3132 ptr
->resultcode
= 0;
3134 if (ptr
->flags
& (FD_RAW_READ
| FD_RAW_WRITE
)) {
3135 if (ptr
->length
<= 0)
3137 ptr
->kernel_data
= (char *)fd_dma_mem_alloc(ptr
->length
);
3138 fallback_on_nodma_alloc(&ptr
->kernel_data
, ptr
->length
);
3139 if (!ptr
->kernel_data
)
3141 ptr
->buffer_length
= ptr
->length
;
3143 if (ptr
->flags
& FD_RAW_WRITE
) {
3144 ret
= fd_copyin(ptr
->data
, ptr
->kernel_data
, ptr
->length
);
3149 if (ptr
->flags
& FD_RAW_MORE
) {
3150 rcmd
= &(ptr
->next
);
3158 static int raw_cmd_ioctl(int cmd
, void __user
*param
)
3160 struct floppy_raw_cmd
*my_raw_cmd
;
3165 if (FDCS
->rawcmd
<= 1)
3167 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
3168 if (FDC(drive
) != fdc
)
3170 if (drive
== current_drive
) {
3171 if (UDRS
->fd_ref
> 1) {
3175 } else if (UDRS
->fd_ref
) {
3184 ret
= raw_cmd_copyin(cmd
, param
, &my_raw_cmd
);
3186 raw_cmd_free(&my_raw_cmd
);
3190 raw_cmd
= my_raw_cmd
;
3191 cont
= &raw_cmd_cont
;
3192 ret
= wait_til_done(floppy_start
, true);
3193 debug_dcl(DP
->flags
, "calling disk change from raw_cmd ioctl\n");
3195 if (ret
!= -EINTR
&& FDCS
->reset
)
3198 DRS
->track
= NO_TRACK
;
3200 ret2
= raw_cmd_copyout(cmd
, param
, my_raw_cmd
);
3203 raw_cmd_free(&my_raw_cmd
);
3207 static int invalidate_drive(struct block_device
*bdev
)
3209 /* invalidate the buffer track to force a reread */
3210 set_bit((long)bdev
->bd_disk
->private_data
, &fake_change
);
3211 process_fd_request();
3212 check_disk_change(bdev
);
3216 static int set_geometry(unsigned int cmd
, struct floppy_struct
*g
,
3217 int drive
, int type
, struct block_device
*bdev
)
3221 /* sanity checking for parameters. */
3224 g
->track
<= 0 || g
->track
> UDP
->tracks
>> STRETCH(g
) ||
3225 /* check if reserved bits are set */
3226 (g
->stretch
& ~(FD_STRETCH
| FD_SWAPSIDES
| FD_SECTBASEMASK
)) != 0)
3229 if (!capable(CAP_SYS_ADMIN
))
3231 mutex_lock(&open_lock
);
3232 if (lock_fdc(drive
, true)) {
3233 mutex_unlock(&open_lock
);
3236 floppy_type
[type
] = *g
;
3237 floppy_type
[type
].name
= "user format";
3238 for (cnt
= type
<< 2; cnt
< (type
<< 2) + 4; cnt
++)
3239 floppy_sizes
[cnt
] = floppy_sizes
[cnt
+ 0x80] =
3240 floppy_type
[type
].size
+ 1;
3241 process_fd_request();
3242 for (cnt
= 0; cnt
< N_DRIVE
; cnt
++) {
3243 struct block_device
*bdev
= opened_bdev
[cnt
];
3244 if (!bdev
|| ITYPE(drive_state
[cnt
].fd_device
) != type
)
3246 __invalidate_device(bdev
, true);
3248 mutex_unlock(&open_lock
);
3252 if (lock_fdc(drive
, true))
3254 if (cmd
!= FDDEFPRM
) {
3255 /* notice a disk change immediately, else
3256 * we lose our settings immediately*/
3257 if (poll_drive(true, FD_RAW_NEED_DISK
) == -EINTR
)
3260 oldStretch
= g
->stretch
;
3261 user_params
[drive
] = *g
;
3262 if (buffer_drive
== drive
)
3263 SUPBOUND(buffer_max
, user_params
[drive
].sect
);
3264 current_type
[drive
] = &user_params
[drive
];
3265 floppy_sizes
[drive
] = user_params
[drive
].size
;
3266 if (cmd
== FDDEFPRM
)
3267 DRS
->keep_data
= -1;
3270 /* invalidation. Invalidate only when needed, i.e.
3271 * when there are already sectors in the buffer cache
3272 * whose number will change. This is useful, because
3273 * mtools often changes the geometry of the disk after
3274 * looking at the boot block */
3275 if (DRS
->maxblock
> user_params
[drive
].sect
||
3277 ((user_params
[drive
].sect
^ oldStretch
) &
3278 (FD_SWAPSIDES
| FD_SECTBASEMASK
)))
3279 invalidate_drive(bdev
);
3281 process_fd_request();
3286 /* handle obsolete ioctl's */
3287 static unsigned int ioctl_table
[] = {
3315 static int normalize_ioctl(unsigned int *cmd
, int *size
)
3319 for (i
= 0; i
< ARRAY_SIZE(ioctl_table
); i
++) {
3320 if ((*cmd
& 0xffff) == (ioctl_table
[i
] & 0xffff)) {
3321 *size
= _IOC_SIZE(*cmd
);
3322 *cmd
= ioctl_table
[i
];
3323 if (*size
> _IOC_SIZE(*cmd
)) {
3324 pr_info("ioctl not yet supported\n");
3333 static int get_floppy_geometry(int drive
, int type
, struct floppy_struct
**g
)
3336 *g
= &floppy_type
[type
];
3338 if (lock_fdc(drive
, false))
3340 if (poll_drive(false, 0) == -EINTR
)
3342 process_fd_request();
3343 *g
= current_type
[drive
];
3350 static int fd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
3352 int drive
= (long)bdev
->bd_disk
->private_data
;
3353 int type
= ITYPE(drive_state
[drive
].fd_device
);
3354 struct floppy_struct
*g
;
3357 ret
= get_floppy_geometry(drive
, type
, &g
);
3361 geo
->heads
= g
->head
;
3362 geo
->sectors
= g
->sect
;
3363 geo
->cylinders
= g
->track
;
3367 static int fd_locked_ioctl(struct block_device
*bdev
, fmode_t mode
, unsigned int cmd
,
3368 unsigned long param
)
3370 int drive
= (long)bdev
->bd_disk
->private_data
;
3371 int type
= ITYPE(UDRS
->fd_device
);
3376 struct floppy_struct g
; /* geometry */
3377 struct format_descr f
;
3378 struct floppy_max_errors max_errors
;
3379 struct floppy_drive_params dp
;
3380 } inparam
; /* parameters coming from user space */
3381 const void *outparam
; /* parameters passed back to user space */
3383 /* convert compatibility eject ioctls into floppy eject ioctl.
3384 * We do this in order to provide a means to eject floppy disks before
3385 * installing the new fdutils package */
3386 if (cmd
== CDROMEJECT
|| /* CD-ROM eject */
3387 cmd
== 0x6470) { /* SunOS floppy eject */
3388 DPRINT("obsolete eject ioctl\n");
3389 DPRINT("please use floppycontrol --eject\n");
3393 if (!((cmd
& 0xff00) == 0x0200))
3396 /* convert the old style command into a new style command */
3397 ret
= normalize_ioctl(&cmd
, &size
);
3401 /* permission checks */
3402 if (((cmd
& 0x40) && !(mode
& (FMODE_WRITE
| FMODE_WRITE_IOCTL
))) ||
3403 ((cmd
& 0x80) && !capable(CAP_SYS_ADMIN
)))
3406 if (WARN_ON(size
< 0 || size
> sizeof(inparam
)))
3410 memset(&inparam
, 0, sizeof(inparam
));
3411 if (_IOC_DIR(cmd
) & _IOC_WRITE
) {
3412 ret
= fd_copyin((void __user
*)param
, &inparam
, size
);
3419 if (UDRS
->fd_ref
!= 1)
3420 /* somebody else has this drive open */
3422 if (lock_fdc(drive
, true))
3425 /* do the actual eject. Fails on
3426 * non-Sparc architectures */
3427 ret
= fd_eject(UNIT(drive
));
3429 set_bit(FD_DISK_CHANGED_BIT
, &UDRS
->flags
);
3430 set_bit(FD_VERIFY_BIT
, &UDRS
->flags
);
3431 process_fd_request();
3434 if (lock_fdc(drive
, true))
3436 current_type
[drive
] = NULL
;
3437 floppy_sizes
[drive
] = MAX_DISK_SIZE
<< 1;
3438 UDRS
->keep_data
= 0;
3439 return invalidate_drive(bdev
);
3442 return set_geometry(cmd
, &inparam
.g
, drive
, type
, bdev
);
3444 ret
= get_floppy_geometry(drive
, type
,
3445 (struct floppy_struct
**)&outparam
);
3450 UDP
->flags
|= FTD_MSG
;
3453 UDP
->flags
&= ~FTD_MSG
;
3456 if (lock_fdc(drive
, true))
3458 if (poll_drive(true, FD_RAW_NEED_DISK
) == -EINTR
)
3461 process_fd_request();
3462 if (ret
& FD_VERIFY
)
3464 if (!(ret
& FD_DISK_WRITABLE
))
3468 if (UDRS
->fd_ref
!= 1)
3470 return do_format(drive
, &inparam
.f
);
3473 if (lock_fdc(drive
, true))
3475 return invalidate_drive(bdev
);
3476 case FDSETEMSGTRESH
:
3477 UDP
->max_errors
.reporting
= (unsigned short)(param
& 0x0f);
3480 outparam
= &UDP
->max_errors
;
3483 UDP
->max_errors
= inparam
.max_errors
;
3486 outparam
= drive_name(type
, drive
);
3487 SUPBOUND(size
, strlen((const char *)outparam
) + 1);
3496 if (lock_fdc(drive
, true))
3498 if (poll_drive(true, FD_RAW_NEED_DISK
) == -EINTR
)
3500 process_fd_request();
3506 return user_reset_fdc(drive
, (int)param
, true);
3511 memset(UDRWE
, 0, sizeof(*UDRWE
));
3519 if (lock_fdc(drive
, true))
3522 i
= raw_cmd_ioctl(cmd
, (void __user
*)param
);
3525 process_fd_request();
3528 if (lock_fdc(drive
, true))
3531 process_fd_request();
3537 if (_IOC_DIR(cmd
) & _IOC_READ
)
3538 return fd_copyout((void __user
*)param
, outparam
, size
);
3543 static int fd_ioctl(struct block_device
*bdev
, fmode_t mode
,
3544 unsigned int cmd
, unsigned long param
)
3548 mutex_lock(&floppy_mutex
);
3549 ret
= fd_locked_ioctl(bdev
, mode
, cmd
, param
);
3550 mutex_unlock(&floppy_mutex
);
3555 static void __init
config_types(void)
3557 bool has_drive
= false;
3560 /* read drive info out of physical CMOS */
3563 UDP
->cmos
= FLOPPY0_TYPE
;
3565 if (!UDP
->cmos
&& FLOPPY1_TYPE
)
3566 UDP
->cmos
= FLOPPY1_TYPE
;
3568 /* FIXME: additional physical CMOS drive detection should go here */
3570 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
3571 unsigned int type
= UDP
->cmos
;
3572 struct floppy_drive_params
*params
;
3573 const char *name
= NULL
;
3574 static char temparea
[32];
3576 if (type
< ARRAY_SIZE(default_drive_params
)) {
3577 params
= &default_drive_params
[type
].params
;
3579 name
= default_drive_params
[type
].name
;
3580 allowed_drive_mask
|= 1 << drive
;
3582 allowed_drive_mask
&= ~(1 << drive
);
3584 params
= &default_drive_params
[0].params
;
3585 sprintf(temparea
, "unknown type %d (usb?)", type
);
3589 const char *prepend
;
3593 pr_info("Floppy drive(s):");
3598 pr_cont("%s fd%d is %s", prepend
, drive
, name
);
3607 static void floppy_release(struct gendisk
*disk
, fmode_t mode
)
3609 int drive
= (long)disk
->private_data
;
3611 mutex_lock(&floppy_mutex
);
3612 mutex_lock(&open_lock
);
3613 if (!UDRS
->fd_ref
--) {
3614 DPRINT("floppy_release with fd_ref == 0");
3618 opened_bdev
[drive
] = NULL
;
3619 mutex_unlock(&open_lock
);
3620 mutex_unlock(&floppy_mutex
);
3624 * floppy_open check for aliasing (/dev/fd0 can be the same as
3625 * /dev/PS0 etc), and disallows simultaneous access to the same
3626 * drive with different device numbers.
3628 static int floppy_open(struct block_device
*bdev
, fmode_t mode
)
3630 int drive
= (long)bdev
->bd_disk
->private_data
;
3631 int old_dev
, new_dev
;
3636 mutex_lock(&floppy_mutex
);
3637 mutex_lock(&open_lock
);
3638 old_dev
= UDRS
->fd_device
;
3639 if (opened_bdev
[drive
] && opened_bdev
[drive
] != bdev
)
3642 if (!UDRS
->fd_ref
&& (UDP
->flags
& FD_BROKEN_DCL
)) {
3643 set_bit(FD_DISK_CHANGED_BIT
, &UDRS
->flags
);
3644 set_bit(FD_VERIFY_BIT
, &UDRS
->flags
);
3649 opened_bdev
[drive
] = bdev
;
3653 if (!floppy_track_buffer
) {
3654 /* if opening an ED drive, reserve a big buffer,
3655 * else reserve a small one */
3656 if ((UDP
->cmos
== 6) || (UDP
->cmos
== 5))
3657 try = 64; /* Only 48 actually useful */
3659 try = 32; /* Only 24 actually useful */
3661 tmp
= (char *)fd_dma_mem_alloc(1024 * try);
3662 if (!tmp
&& !floppy_track_buffer
) {
3663 try >>= 1; /* buffer only one side */
3665 tmp
= (char *)fd_dma_mem_alloc(1024 * try);
3667 if (!tmp
&& !floppy_track_buffer
)
3668 fallback_on_nodma_alloc(&tmp
, 2048 * try);
3669 if (!tmp
&& !floppy_track_buffer
) {
3670 DPRINT("Unable to allocate DMA memory\n");
3673 if (floppy_track_buffer
) {
3675 fd_dma_mem_free((unsigned long)tmp
, try * 1024);
3677 buffer_min
= buffer_max
= -1;
3678 floppy_track_buffer
= tmp
;
3679 max_buffer_sectors
= try;
3683 new_dev
= MINOR(bdev
->bd_dev
);
3684 UDRS
->fd_device
= new_dev
;
3685 set_capacity(disks
[drive
], floppy_sizes
[new_dev
]);
3686 if (old_dev
!= -1 && old_dev
!= new_dev
) {
3687 if (buffer_drive
== drive
)
3691 if (UFDCS
->rawcmd
== 1)
3694 if (!(mode
& FMODE_NDELAY
)) {
3695 if (mode
& (FMODE_READ
|FMODE_WRITE
)) {
3696 UDRS
->last_checked
= 0;
3697 clear_bit(FD_OPEN_SHOULD_FAIL_BIT
, &UDRS
->flags
);
3698 check_disk_change(bdev
);
3699 if (test_bit(FD_DISK_CHANGED_BIT
, &UDRS
->flags
))
3701 if (test_bit(FD_OPEN_SHOULD_FAIL_BIT
, &UDRS
->flags
))
3705 if ((mode
& FMODE_WRITE
) &&
3706 !test_bit(FD_DISK_WRITABLE_BIT
, &UDRS
->flags
))
3709 mutex_unlock(&open_lock
);
3710 mutex_unlock(&floppy_mutex
);
3716 opened_bdev
[drive
] = NULL
;
3718 mutex_unlock(&open_lock
);
3719 mutex_unlock(&floppy_mutex
);
3724 * Check if the disk has been changed or if a change has been faked.
3726 static unsigned int floppy_check_events(struct gendisk
*disk
,
3727 unsigned int clearing
)
3729 int drive
= (long)disk
->private_data
;
3731 if (test_bit(FD_DISK_CHANGED_BIT
, &UDRS
->flags
) ||
3732 test_bit(FD_VERIFY_BIT
, &UDRS
->flags
))
3733 return DISK_EVENT_MEDIA_CHANGE
;
3735 if (time_after(jiffies
, UDRS
->last_checked
+ UDP
->checkfreq
)) {
3736 lock_fdc(drive
, false);
3737 poll_drive(false, 0);
3738 process_fd_request();
3741 if (test_bit(FD_DISK_CHANGED_BIT
, &UDRS
->flags
) ||
3742 test_bit(FD_VERIFY_BIT
, &UDRS
->flags
) ||
3743 test_bit(drive
, &fake_change
) ||
3744 drive_no_geom(drive
))
3745 return DISK_EVENT_MEDIA_CHANGE
;
3750 * This implements "read block 0" for floppy_revalidate().
3751 * Needed for format autodetection, checking whether there is
3752 * a disk in the drive, and whether that disk is writable.
3757 struct completion complete
;
3760 static void floppy_rb0_cb(struct bio
*bio
, int err
)
3762 struct rb0_cbdata
*cbdata
= (struct rb0_cbdata
*)bio
->bi_private
;
3763 int drive
= cbdata
->drive
;
3766 pr_info("floppy: error %d while reading block 0", err
);
3767 set_bit(FD_OPEN_SHOULD_FAIL_BIT
, &UDRS
->flags
);
3769 complete(&cbdata
->complete
);
3772 static int __floppy_read_block_0(struct block_device
*bdev
, int drive
)
3775 struct bio_vec bio_vec
;
3777 struct rb0_cbdata cbdata
;
3780 page
= alloc_page(GFP_NOIO
);
3782 process_fd_request();
3786 size
= bdev
->bd_block_size
;
3790 cbdata
.drive
= drive
;
3793 bio
.bi_io_vec
= &bio_vec
;
3794 bio_vec
.bv_page
= page
;
3795 bio_vec
.bv_len
= size
;
3796 bio_vec
.bv_offset
= 0;
3801 bio
.bi_flags
|= (1 << BIO_QUIET
);
3802 bio
.bi_private
= &cbdata
;
3803 bio
.bi_end_io
= floppy_rb0_cb
;
3805 submit_bio(READ
, &bio
);
3806 process_fd_request();
3808 init_completion(&cbdata
.complete
);
3809 wait_for_completion(&cbdata
.complete
);
3816 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
3817 * the bootblock (block 0). "Autodetection" is also needed to check whether
3818 * there is a disk in the drive at all... Thus we also do it for fixed
3819 * geometry formats */
3820 static int floppy_revalidate(struct gendisk
*disk
)
3822 int drive
= (long)disk
->private_data
;
3826 if (test_bit(FD_DISK_CHANGED_BIT
, &UDRS
->flags
) ||
3827 test_bit(FD_VERIFY_BIT
, &UDRS
->flags
) ||
3828 test_bit(drive
, &fake_change
) ||
3829 drive_no_geom(drive
)) {
3830 if (WARN(atomic_read(&usage_count
) == 0,
3831 "VFS: revalidate called on non-open device.\n"))
3834 lock_fdc(drive
, false);
3835 cf
= (test_bit(FD_DISK_CHANGED_BIT
, &UDRS
->flags
) ||
3836 test_bit(FD_VERIFY_BIT
, &UDRS
->flags
));
3837 if (!(cf
|| test_bit(drive
, &fake_change
) || drive_no_geom(drive
))) {
3838 process_fd_request(); /*already done by another thread */
3843 if (buffer_drive
== drive
)
3845 clear_bit(drive
, &fake_change
);
3846 clear_bit(FD_DISK_CHANGED_BIT
, &UDRS
->flags
);
3849 if (drive_no_geom(drive
)) {
3851 res
= __floppy_read_block_0(opened_bdev
[drive
], drive
);
3854 poll_drive(false, FD_RAW_NEED_DISK
);
3855 process_fd_request();
3858 set_capacity(disk
, floppy_sizes
[UDRS
->fd_device
]);
3862 static const struct block_device_operations floppy_fops
= {
3863 .owner
= THIS_MODULE
,
3864 .open
= floppy_open
,
3865 .release
= floppy_release
,
3867 .getgeo
= fd_getgeo
,
3868 .check_events
= floppy_check_events
,
3869 .revalidate_disk
= floppy_revalidate
,
3873 * Floppy Driver initialization
3874 * =============================
3877 /* Determine the floppy disk controller type */
3878 /* This routine was written by David C. Niemi */
3879 static char __init
get_fdc_version(void)
3883 output_byte(FD_DUMPREGS
); /* 82072 and better know DUMPREGS */
3888 return FDC_NONE
; /* No FDC present ??? */
3889 if ((r
== 1) && (reply_buffer
[0] == 0x80)) {
3890 pr_info("FDC %d is an 8272A\n", fdc
);
3891 return FDC_8272A
; /* 8272a/765 don't know DUMPREGS */
3894 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
3899 if (!fdc_configure()) {
3900 pr_info("FDC %d is an 82072\n", fdc
);
3901 return FDC_82072
; /* 82072 doesn't know CONFIGURE */
3904 output_byte(FD_PERPENDICULAR
);
3905 if (need_more_output() == MORE_OUTPUT
) {
3908 pr_info("FDC %d is an 82072A\n", fdc
);
3909 return FDC_82072A
; /* 82072A as found on Sparcs. */
3912 output_byte(FD_UNLOCK
);
3914 if ((r
== 1) && (reply_buffer
[0] == 0x80)) {
3915 pr_info("FDC %d is a pre-1991 82077\n", fdc
);
3916 return FDC_82077_ORIG
; /* Pre-1991 82077, doesn't know
3919 if ((r
!= 1) || (reply_buffer
[0] != 0x00)) {
3920 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
3924 output_byte(FD_PARTID
);
3927 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
3931 if (reply_buffer
[0] == 0x80) {
3932 pr_info("FDC %d is a post-1991 82077\n", fdc
);
3933 return FDC_82077
; /* Revised 82077AA passes all the tests */
3935 switch (reply_buffer
[0] >> 5) {
3937 /* Either a 82078-1 or a 82078SL running at 5Volt */
3938 pr_info("FDC %d is an 82078.\n", fdc
);
3941 pr_info("FDC %d is a 44pin 82078\n", fdc
);
3944 pr_info("FDC %d is a S82078B\n", fdc
);
3947 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc
);
3950 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n",
3951 fdc
, reply_buffer
[0] >> 5);
3952 return FDC_82078_UNKN
;
3954 } /* get_fdc_version */
3956 /* lilo configuration */
3958 static void __init
floppy_set_flags(int *ints
, int param
, int param2
)
3962 for (i
= 0; i
< ARRAY_SIZE(default_drive_params
); i
++) {
3964 default_drive_params
[i
].params
.flags
|= param2
;
3966 default_drive_params
[i
].params
.flags
&= ~param2
;
3968 DPRINT("%s flag 0x%x\n", param2
? "Setting" : "Clearing", param
);
3971 static void __init
daring(int *ints
, int param
, int param2
)
3975 for (i
= 0; i
< ARRAY_SIZE(default_drive_params
); i
++) {
3977 default_drive_params
[i
].params
.select_delay
= 0;
3978 default_drive_params
[i
].params
.flags
|=
3979 FD_SILENT_DCL_CLEAR
;
3981 default_drive_params
[i
].params
.select_delay
=
3983 default_drive_params
[i
].params
.flags
&=
3984 ~FD_SILENT_DCL_CLEAR
;
3987 DPRINT("Assuming %s floppy hardware\n", param
? "standard" : "broken");
3990 static void __init
set_cmos(int *ints
, int dummy
, int dummy2
)
3992 int current_drive
= 0;
3995 DPRINT("wrong number of parameters for CMOS\n");
3998 current_drive
= ints
[1];
3999 if (current_drive
< 0 || current_drive
>= 8) {
4000 DPRINT("bad drive for set_cmos\n");
4004 if (current_drive
>= 4 && !FDC2
)
4008 DPRINT("setting CMOS code to %d\n", ints
[2]);
4011 static struct param_table
{
4013 void (*fn
) (int *ints
, int param
, int param2
);
4017 } config_params
[] __initdata
= {
4018 {"allowed_drive_mask", NULL
, &allowed_drive_mask
, 0xff, 0}, /* obsolete */
4019 {"all_drives", NULL
, &allowed_drive_mask
, 0xff, 0}, /* obsolete */
4020 {"asus_pci", NULL
, &allowed_drive_mask
, 0x33, 0},
4021 {"irq", NULL
, &FLOPPY_IRQ
, 6, 0},
4022 {"dma", NULL
, &FLOPPY_DMA
, 2, 0},
4023 {"daring", daring
, NULL
, 1, 0},
4025 {"two_fdc", NULL
, &FDC2
, 0x370, 0},
4026 {"one_fdc", NULL
, &FDC2
, 0, 0},
4028 {"thinkpad", floppy_set_flags
, NULL
, 1, FD_INVERTED_DCL
},
4029 {"broken_dcl", floppy_set_flags
, NULL
, 1, FD_BROKEN_DCL
},
4030 {"messages", floppy_set_flags
, NULL
, 1, FTD_MSG
},
4031 {"silent_dcl_clear", floppy_set_flags
, NULL
, 1, FD_SILENT_DCL_CLEAR
},
4032 {"debug", floppy_set_flags
, NULL
, 1, FD_DEBUG
},
4033 {"nodma", NULL
, &can_use_virtual_dma
, 1, 0},
4034 {"omnibook", NULL
, &can_use_virtual_dma
, 1, 0},
4035 {"yesdma", NULL
, &can_use_virtual_dma
, 0, 0},
4036 {"fifo_depth", NULL
, &fifo_depth
, 0xa, 0},
4037 {"nofifo", NULL
, &no_fifo
, 0x20, 0},
4038 {"usefifo", NULL
, &no_fifo
, 0, 0},
4039 {"cmos", set_cmos
, NULL
, 0, 0},
4040 {"slow", NULL
, &slow_floppy
, 1, 0},
4041 {"unexpected_interrupts", NULL
, &print_unex
, 1, 0},
4042 {"no_unexpected_interrupts", NULL
, &print_unex
, 0, 0},
4043 {"L40SX", NULL
, &print_unex
, 0, 0}
4048 static int __init
floppy_setup(char *str
)
4054 str
= get_options(str
, ARRAY_SIZE(ints
), ints
);
4056 for (i
= 0; i
< ARRAY_SIZE(config_params
); i
++) {
4057 if (strcmp(str
, config_params
[i
].name
) == 0) {
4061 param
= config_params
[i
].def_param
;
4062 if (config_params
[i
].fn
)
4063 config_params
[i
].fn(ints
, param
,
4066 if (config_params
[i
].var
) {
4067 DPRINT("%s=%d\n", str
, param
);
4068 *config_params
[i
].var
= param
;
4075 DPRINT("unknown floppy option [%s]\n", str
);
4077 DPRINT("allowed options are:");
4078 for (i
= 0; i
< ARRAY_SIZE(config_params
); i
++)
4079 pr_cont(" %s", config_params
[i
].name
);
4082 DPRINT("botched floppy option\n");
4083 DPRINT("Read Documentation/blockdev/floppy.txt\n");
4087 static int have_no_fdc
= -ENODEV
;
4089 static ssize_t
floppy_cmos_show(struct device
*dev
,
4090 struct device_attribute
*attr
, char *buf
)
4092 struct platform_device
*p
= to_platform_device(dev
);
4096 return sprintf(buf
, "%X\n", UDP
->cmos
);
4099 static DEVICE_ATTR(cmos
, S_IRUGO
, floppy_cmos_show
, NULL
);
4101 static void floppy_device_release(struct device
*dev
)
4105 static int floppy_resume(struct device
*dev
)
4109 for (fdc
= 0; fdc
< N_FDC
; fdc
++)
4110 if (FDCS
->address
!= -1)
4111 user_reset_fdc(-1, FD_RESET_ALWAYS
, false);
4116 static const struct dev_pm_ops floppy_pm_ops
= {
4117 .resume
= floppy_resume
,
4118 .restore
= floppy_resume
,
4121 static struct platform_driver floppy_driver
= {
4124 .pm
= &floppy_pm_ops
,
4128 static struct platform_device floppy_device
[N_DRIVE
];
4130 static bool floppy_available(int drive
)
4132 if (!(allowed_drive_mask
& (1 << drive
)))
4134 if (fdc_state
[FDC(drive
)].version
== FDC_NONE
)
4139 static struct kobject
*floppy_find(dev_t dev
, int *part
, void *data
)
4141 int drive
= (*part
& 3) | ((*part
& 0x80) >> 5);
4142 if (drive
>= N_DRIVE
|| !floppy_available(drive
))
4144 if (((*part
>> 2) & 0x1f) >= ARRAY_SIZE(floppy_type
))
4147 return get_disk(disks
[drive
]);
4150 static int __init
do_floppy_init(void)
4152 int i
, unit
, drive
, err
;
4155 interruptjiffies
= resultjiffies
= jiffies
;
4157 #if defined(CONFIG_PPC)
4158 if (check_legacy_ioport(FDC1
))
4164 floppy_wq
= alloc_ordered_workqueue("floppy", 0);
4168 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
4169 disks
[drive
] = alloc_disk(1);
4170 if (!disks
[drive
]) {
4175 disks
[drive
]->queue
= blk_init_queue(do_fd_request
, &floppy_lock
);
4176 if (!disks
[drive
]->queue
) {
4181 blk_queue_max_hw_sectors(disks
[drive
]->queue
, 64);
4182 disks
[drive
]->major
= FLOPPY_MAJOR
;
4183 disks
[drive
]->first_minor
= TOMINOR(drive
);
4184 disks
[drive
]->fops
= &floppy_fops
;
4185 sprintf(disks
[drive
]->disk_name
, "fd%d", drive
);
4187 init_timer(&motor_off_timer
[drive
]);
4188 motor_off_timer
[drive
].data
= drive
;
4189 motor_off_timer
[drive
].function
= motor_off_callback
;
4192 err
= register_blkdev(FLOPPY_MAJOR
, "fd");
4196 err
= platform_driver_register(&floppy_driver
);
4198 goto out_unreg_blkdev
;
4200 blk_register_region(MKDEV(FLOPPY_MAJOR
, 0), 256, THIS_MODULE
,
4201 floppy_find
, NULL
, NULL
);
4203 for (i
= 0; i
< 256; i
++)
4205 floppy_sizes
[i
] = floppy_type
[ITYPE(i
)].size
;
4207 floppy_sizes
[i
] = MAX_DISK_SIZE
<< 1;
4209 reschedule_timeout(MAXTIMEOUT
, "floppy init");
4212 for (i
= 0; i
< N_FDC
; i
++) {
4214 memset(FDCS
, 0, sizeof(*FDCS
));
4217 #if defined(__sparc__) || defined(__mc68000__)
4218 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4222 FDCS
->version
= FDC_82072A
;
4226 use_virtual_dma
= can_use_virtual_dma
& 1;
4227 fdc_state
[0].address
= FDC1
;
4228 if (fdc_state
[0].address
== -1) {
4229 cancel_delayed_work(&fd_timeout
);
4231 goto out_unreg_region
;
4234 fdc_state
[1].address
= FDC2
;
4237 fdc
= 0; /* reset fdc in case of unexpected interrupt */
4238 err
= floppy_grab_irq_and_dma();
4240 cancel_delayed_work(&fd_timeout
);
4242 goto out_unreg_region
;
4245 /* initialise drive state */
4246 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
4247 memset(UDRS
, 0, sizeof(*UDRS
));
4248 memset(UDRWE
, 0, sizeof(*UDRWE
));
4249 set_bit(FD_DISK_NEWCHANGE_BIT
, &UDRS
->flags
);
4250 set_bit(FD_DISK_CHANGED_BIT
, &UDRS
->flags
);
4251 set_bit(FD_VERIFY_BIT
, &UDRS
->flags
);
4252 UDRS
->fd_device
= -1;
4253 floppy_track_buffer
= NULL
;
4254 max_buffer_sectors
= 0;
4257 * Small 10 msec delay to let through any interrupt that
4258 * initialization might have triggered, to not
4259 * confuse detection:
4263 for (i
= 0; i
< N_FDC
; i
++) {
4265 FDCS
->driver_version
= FD_DRIVER_VERSION
;
4266 for (unit
= 0; unit
< 4; unit
++)
4267 FDCS
->track
[unit
] = 0;
4268 if (FDCS
->address
== -1)
4271 if (user_reset_fdc(-1, FD_RESET_ALWAYS
, false)) {
4272 /* free ioports reserved by floppy_grab_irq_and_dma() */
4273 floppy_release_regions(fdc
);
4275 FDCS
->version
= FDC_NONE
;
4278 /* Try to determine the floppy controller type */
4279 FDCS
->version
= get_fdc_version();
4280 if (FDCS
->version
== FDC_NONE
) {
4281 /* free ioports reserved by floppy_grab_irq_and_dma() */
4282 floppy_release_regions(fdc
);
4286 if (can_use_virtual_dma
== 2 && FDCS
->version
< FDC_82072A
)
4287 can_use_virtual_dma
= 0;
4290 /* Not all FDCs seem to be able to handle the version command
4291 * properly, so force a reset for the standard FDC clones,
4292 * to avoid interrupt garbage.
4294 user_reset_fdc(-1, FD_RESET_ALWAYS
, false);
4297 cancel_delayed_work(&fd_timeout
);
4301 DPRINT("no floppy controllers found\n");
4303 goto out_release_dma
;
4306 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
4307 if (!floppy_available(drive
))
4310 floppy_device
[drive
].name
= floppy_device_name
;
4311 floppy_device
[drive
].id
= drive
;
4312 floppy_device
[drive
].dev
.release
= floppy_device_release
;
4314 err
= platform_device_register(&floppy_device
[drive
]);
4316 goto out_remove_drives
;
4318 err
= device_create_file(&floppy_device
[drive
].dev
,
4321 goto out_unreg_platform_dev
;
4323 /* to be cleaned up... */
4324 disks
[drive
]->private_data
= (void *)(long)drive
;
4325 disks
[drive
]->flags
|= GENHD_FL_REMOVABLE
;
4326 disks
[drive
]->driverfs_dev
= &floppy_device
[drive
].dev
;
4327 add_disk(disks
[drive
]);
4332 out_unreg_platform_dev
:
4333 platform_device_unregister(&floppy_device
[drive
]);
4336 if (floppy_available(drive
)) {
4337 del_gendisk(disks
[drive
]);
4338 device_remove_file(&floppy_device
[drive
].dev
, &dev_attr_cmos
);
4339 platform_device_unregister(&floppy_device
[drive
]);
4343 if (atomic_read(&usage_count
))
4344 floppy_release_irq_and_dma();
4346 blk_unregister_region(MKDEV(FLOPPY_MAJOR
, 0), 256);
4347 platform_driver_unregister(&floppy_driver
);
4349 unregister_blkdev(FLOPPY_MAJOR
, "fd");
4351 destroy_workqueue(floppy_wq
);
4352 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
4355 if (disks
[drive
]->queue
) {
4356 del_timer_sync(&motor_off_timer
[drive
]);
4357 blk_cleanup_queue(disks
[drive
]->queue
);
4358 disks
[drive
]->queue
= NULL
;
4360 put_disk(disks
[drive
]);
4366 static __init
void floppy_async_init(void *data
, async_cookie_t cookie
)
4372 static int __init
floppy_init(void)
4375 return do_floppy_init();
4377 /* Don't hold up the bootup by the floppy initialization */
4378 async_schedule(floppy_async_init
, NULL
);
4383 static const struct io_region
{
4388 /* address + 3 is sometimes reserved by pnp bios for motherboard */
4390 /* address + 6 is reserved, and may be taken by IDE.
4391 * Unfortunately, Adaptec doesn't know this :-(, */
4395 static void floppy_release_allocated_regions(int fdc
, const struct io_region
*p
)
4397 while (p
!= io_regions
) {
4399 release_region(FDCS
->address
+ p
->offset
, p
->size
);
4403 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
4405 static int floppy_request_regions(int fdc
)
4407 const struct io_region
*p
;
4409 for (p
= io_regions
; p
< ARRAY_END(io_regions
); p
++) {
4410 if (!request_region(FDCS
->address
+ p
->offset
,
4411 p
->size
, "floppy")) {
4412 DPRINT("Floppy io-port 0x%04lx in use\n",
4413 FDCS
->address
+ p
->offset
);
4414 floppy_release_allocated_regions(fdc
, p
);
4421 static void floppy_release_regions(int fdc
)
4423 floppy_release_allocated_regions(fdc
, ARRAY_END(io_regions
));
4426 static int floppy_grab_irq_and_dma(void)
4428 if (atomic_inc_return(&usage_count
) > 1)
4432 * We might have scheduled a free_irq(), wait it to
4435 flush_workqueue(floppy_wq
);
4437 if (fd_request_irq()) {
4438 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4440 atomic_dec(&usage_count
);
4443 if (fd_request_dma()) {
4444 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4446 if (can_use_virtual_dma
& 2)
4447 use_virtual_dma
= can_use_virtual_dma
= 1;
4448 if (!(can_use_virtual_dma
& 1)) {
4450 atomic_dec(&usage_count
);
4455 for (fdc
= 0; fdc
< N_FDC
; fdc
++) {
4456 if (FDCS
->address
!= -1) {
4457 if (floppy_request_regions(fdc
))
4461 for (fdc
= 0; fdc
< N_FDC
; fdc
++) {
4462 if (FDCS
->address
!= -1) {
4464 fd_outb(FDCS
->dor
, FD_DOR
);
4468 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4470 for (fdc
= 0; fdc
< N_FDC
; fdc
++)
4471 if (FDCS
->address
!= -1)
4472 fd_outb(FDCS
->dor
, FD_DOR
);
4474 * The driver will try and free resources and relies on us
4475 * to know if they were allocated or not.
4478 irqdma_allocated
= 1;
4484 floppy_release_regions(fdc
);
4485 atomic_dec(&usage_count
);
4489 static void floppy_release_irq_and_dma(void)
4496 unsigned long tmpaddr
;
4498 if (!atomic_dec_and_test(&usage_count
))
4501 if (irqdma_allocated
) {
4505 irqdma_allocated
= 0;
4512 if (floppy_track_buffer
&& max_buffer_sectors
) {
4513 tmpsize
= max_buffer_sectors
* 1024;
4514 tmpaddr
= (unsigned long)floppy_track_buffer
;
4515 floppy_track_buffer
= NULL
;
4516 max_buffer_sectors
= 0;
4517 buffer_min
= buffer_max
= -1;
4518 fd_dma_mem_free(tmpaddr
, tmpsize
);
4521 for (drive
= 0; drive
< N_FDC
* 4; drive
++)
4522 if (timer_pending(motor_off_timer
+ drive
))
4523 pr_info("motor off timer %d still active\n", drive
);
4526 if (delayed_work_pending(&fd_timeout
))
4527 pr_info("floppy timer still active:%s\n", timeout_message
);
4528 if (delayed_work_pending(&fd_timer
))
4529 pr_info("auxiliary floppy timer still active\n");
4530 if (work_pending(&floppy_work
))
4531 pr_info("work still pending\n");
4533 for (fdc
= 0; fdc
< N_FDC
; fdc
++)
4534 if (FDCS
->address
!= -1)
4535 floppy_release_regions(fdc
);
4541 static char *floppy
;
4543 static void __init
parse_floppy_cfg_string(char *cfg
)
4549 while (*cfg
&& *cfg
!= ' ' && *cfg
!= '\t')
4560 static int __init
floppy_module_init(void)
4563 parse_floppy_cfg_string(floppy
);
4564 return floppy_init();
4566 module_init(floppy_module_init
);
4568 static void __exit
floppy_module_exit(void)
4572 blk_unregister_region(MKDEV(FLOPPY_MAJOR
, 0), 256);
4573 unregister_blkdev(FLOPPY_MAJOR
, "fd");
4574 platform_driver_unregister(&floppy_driver
);
4576 destroy_workqueue(floppy_wq
);
4578 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
4579 del_timer_sync(&motor_off_timer
[drive
]);
4581 if (floppy_available(drive
)) {
4582 del_gendisk(disks
[drive
]);
4583 device_remove_file(&floppy_device
[drive
].dev
, &dev_attr_cmos
);
4584 platform_device_unregister(&floppy_device
[drive
]);
4586 blk_cleanup_queue(disks
[drive
]->queue
);
4589 * These disks have not called add_disk(). Don't put down
4590 * queue reference in put_disk().
4592 if (!(allowed_drive_mask
& (1 << drive
)) ||
4593 fdc_state
[FDC(drive
)].version
== FDC_NONE
)
4594 disks
[drive
]->queue
= NULL
;
4596 put_disk(disks
[drive
]);
4599 cancel_delayed_work_sync(&fd_timeout
);
4600 cancel_delayed_work_sync(&fd_timer
);
4602 if (atomic_read(&usage_count
))
4603 floppy_release_irq_and_dma();
4605 /* eject disk, if any */
4609 module_exit(floppy_module_exit
);
4611 module_param(floppy
, charp
, 0);
4612 module_param(FLOPPY_IRQ
, int, 0);
4613 module_param(FLOPPY_DMA
, int, 0);
4614 MODULE_AUTHOR("Alain L. Knaff");
4615 MODULE_SUPPORTED_DEVICE("fd");
4616 MODULE_LICENSE("GPL");
4618 /* This doesn't actually get used other than for module information */
4619 static const struct pnp_device_id floppy_pnpids
[] = {
4624 MODULE_DEVICE_TABLE(pnp
, floppy_pnpids
);
4628 __setup("floppy=", floppy_setup
);
4629 module_init(floppy_init
)
4632 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR
);