2 * linux/drivers/block/floppy.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 * Copyright (C) 1993, 1994 Alain Knaff
6 * Copyright (C) 1998 Alan Cox
10 * 02.12.91 - Changed to static variables to indicate need for reset
11 * and recalibrate. This makes some things easier (output_byte reset
12 * checking etc), and means less interrupt jumping in case of errors,
13 * so the code is hopefully easier to understand.
17 * This file is certainly a mess. I've tried my best to get it working,
18 * but I don't like programming floppies, and I have only one anyway.
19 * Urgel. I should check for more errors, and do more graceful error
20 * recovery. Seems there are problems with several drives. I've tried to
21 * correct them. No promises.
25 * As with hd.c, all routines within this file can (and will) be called
26 * by interrupts, so extreme caution is needed. A hardware interrupt
27 * handler may not sleep, or a kernel panic will happen. Thus I cannot
28 * call "floppy-on" directly, but have to set a special timer interrupt
33 * 28.02.92 - made track-buffering routines, based on the routines written
34 * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus.
38 * Automatic floppy-detection and formatting written by Werner Almesberger
39 * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with
40 * the floppy-change signal detection.
44 * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed
45 * FDC data overrun bug, added some preliminary stuff for vertical
48 * 1992/9/17: Added DMA allocation & DMA functions. -- hhb.
50 * TODO: Errors are still not counted properly.
54 * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl)
55 * modeled after the freeware MS-DOS program fdformat/88 V1.8 by
56 * Christoph H. Hochst\"atter.
57 * I have fixed the shift values to the ones I always use. Maybe a new
58 * ioctl() should be created to be able to modify them.
59 * There is a bug in the driver that makes it impossible to format a
60 * floppy as the first thing after bootup.
64 * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and
65 * this helped the floppy driver as well. Much cleaner, and still seems to
69 /* 1994/6/24 --bbroad-- added the floppy table entries and made
70 * minor modifications to allow 2.88 floppies to be run.
73 /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more
78 * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger
79 * format bug fixes, but unfortunately some new bugs too...
82 /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write
83 * errors to allow safe writing by specialized programs.
86 /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks
87 * by defining bit 1 of the "stretch" parameter to mean put sectors on the
88 * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's
89 * drives are "upside-down").
93 * 1995/8/26 -- Andreas Busse -- added Mips support.
97 * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent
98 * features to asm/floppy.h.
102 * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
106 * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of
107 * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting &
108 * use of '0' for NULL.
112 * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation
117 * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives.
121 * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24
122 * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were
123 * being used to store jiffies, which are unsigned longs).
127 * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br>
128 * - get rid of check_region
133 * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no
134 * floppy controller (lingering task on list after module is gone... boom.)
138 * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range
139 * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix
140 * requires many non-obvious changes in arch dependent code.
143 /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>.
144 * Better audit of register_blkdev.
147 #define FLOPPY_SANITY_CHECK
148 #undef FLOPPY_SILENT_DCL_CLEAR
150 #define REALLY_SLOW_IO
153 #define DCL_DEBUG /* debug disk change line */
155 /* do print messages for unexpected interrupts */
156 static int print_unex
= 1;
157 #include <linux/module.h>
158 #include <linux/sched.h>
159 #include <linux/fs.h>
160 #include <linux/kernel.h>
161 #include <linux/timer.h>
162 #include <linux/workqueue.h>
164 #include <linux/fdreg.h>
165 #include <linux/fd.h>
166 #include <linux/hdreg.h>
167 #include <linux/errno.h>
168 #include <linux/slab.h>
169 #include <linux/mm.h>
170 #include <linux/bio.h>
171 #include <linux/string.h>
172 #include <linux/jiffies.h>
173 #include <linux/fcntl.h>
174 #include <linux/delay.h>
175 #include <linux/mc146818rtc.h> /* CMOS defines */
176 #include <linux/ioport.h>
177 #include <linux/interrupt.h>
178 #include <linux/init.h>
179 #include <linux/platform_device.h>
180 #include <linux/mod_devicetable.h>
181 #include <linux/buffer_head.h> /* for invalidate_buffers() */
182 #include <linux/mutex.h>
183 #include <linux/io.h>
184 #include <linux/uaccess.h>
187 * PS/2 floppies have much slower step rates than regular floppies.
188 * It's been recommended that take about 1/4 of the default speed
189 * in some more extreme cases.
191 static int slow_floppy
;
195 #include <asm/system.h>
197 static int FLOPPY_IRQ
= 6;
198 static int FLOPPY_DMA
= 2;
199 static int can_use_virtual_dma
= 2;
201 * can use virtual DMA:
202 * 0 = use of virtual DMA disallowed by config
203 * 1 = use of virtual DMA prescribed by config
204 * 2 = no virtual DMA preference configured. By default try hard DMA,
205 * but fall back on virtual DMA when not enough memory available
208 static int use_virtual_dma
;
212 * 1 using virtual DMA
213 * This variable is set to virtual when a DMA mem problem arises, and
214 * reset back in floppy_grab_irq_and_dma.
215 * It is not safe to reset it in other circumstances, because the floppy
216 * driver may have several buffers in use at once, and we do currently not
217 * record each buffers capabilities
220 static DEFINE_SPINLOCK(floppy_lock
);
222 static unsigned short virtual_dma_port
= 0x3f0;
223 irqreturn_t
floppy_interrupt(int irq
, void *dev_id
);
224 static int set_dor(int fdc
, char mask
, char data
);
226 #define K_64 0x10000 /* 64KB */
228 /* the following is the mask of allowed drives. By default units 2 and
229 * 3 of both floppy controllers are disabled, because switching on the
230 * motor of these drives causes system hangs on some PCI computers. drive
231 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
232 * a drive is allowed.
234 * NOTE: This must come before we include the arch floppy header because
235 * some ports reference this variable from there. -DaveM
238 static int allowed_drive_mask
= 0x33;
240 #include <asm/floppy.h>
242 static int irqdma_allocated
;
244 #define DEVICE_NAME "floppy"
246 #include <linux/blkdev.h>
247 #include <linux/blkpg.h>
248 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
249 #include <linux/completion.h>
251 static struct request
*current_req
;
252 static struct request_queue
*floppy_queue
;
253 static void do_fd_request(struct request_queue
*q
);
255 #ifndef fd_get_dma_residue
256 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
259 /* Dma Memory related stuff */
261 #ifndef fd_dma_mem_free
262 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
265 #ifndef fd_dma_mem_alloc
266 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size))
269 static inline void fallback_on_nodma_alloc(char **addr
, size_t l
)
271 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
273 return; /* we have the memory */
274 if (can_use_virtual_dma
!= 2)
275 return; /* no fallback allowed */
276 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n");
277 *addr
= (char *)nodma_mem_alloc(l
);
283 /* End dma memory related stuff */
285 static unsigned long fake_change
;
286 static int initialising
= 1;
288 #define ITYPE(x) (((x) >> 2) & 0x1f)
289 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
290 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
291 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
292 /* reverse mapping from unit and fdc to drive */
293 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
295 #define DP (&drive_params[current_drive])
296 #define DRS (&drive_state[current_drive])
297 #define DRWE (&write_errors[current_drive])
298 #define FDCS (&fdc_state[fdc])
299 #define CLEARF(x) clear_bit(x##_BIT, &DRS->flags)
300 #define SETF(x) set_bit(x##_BIT, &DRS->flags)
301 #define TESTF(x) test_bit(x##_BIT, &DRS->flags)
303 #define UDP (&drive_params[drive])
304 #define UDRS (&drive_state[drive])
305 #define UDRWE (&write_errors[drive])
306 #define UFDCS (&fdc_state[FDC(drive)])
307 #define UCLEARF(x) clear_bit(x##_BIT, &UDRS->flags)
308 #define USETF(x) set_bit(x##_BIT, &UDRS->flags)
309 #define UTESTF(x) test_bit(x##_BIT, &UDRS->flags)
311 #define DPRINT(format, args...) \
312 pr_info(DEVICE_NAME "%d: " format, current_drive, ##args)
314 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
315 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
318 #define COMMAND (raw_cmd->cmd[0])
319 #define DR_SELECT (raw_cmd->cmd[1])
320 #define TRACK (raw_cmd->cmd[2])
321 #define HEAD (raw_cmd->cmd[3])
322 #define SECTOR (raw_cmd->cmd[4])
323 #define SIZECODE (raw_cmd->cmd[5])
324 #define SECT_PER_TRACK (raw_cmd->cmd[6])
325 #define GAP (raw_cmd->cmd[7])
326 #define SIZECODE2 (raw_cmd->cmd[8])
330 #define F_SIZECODE (raw_cmd->cmd[2])
331 #define F_SECT_PER_TRACK (raw_cmd->cmd[3])
332 #define F_GAP (raw_cmd->cmd[4])
333 #define F_FILL (raw_cmd->cmd[5])
337 * Maximum disk size (in kilobytes).
338 * This default is used whenever the current disk size is unknown.
339 * [Now it is rather a minimum]
341 #define MAX_DISK_SIZE 4 /* 3984 */
344 * globals used by 'result()'
346 #define MAX_REPLIES 16
347 static unsigned char reply_buffer
[MAX_REPLIES
];
348 static int inr
; /* size of reply buffer, when called from interrupt */
349 #define ST0 (reply_buffer[0])
350 #define ST1 (reply_buffer[1])
351 #define ST2 (reply_buffer[2])
352 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */
353 #define R_TRACK (reply_buffer[3])
354 #define R_HEAD (reply_buffer[4])
355 #define R_SECTOR (reply_buffer[5])
356 #define R_SIZECODE (reply_buffer[6])
358 #define SEL_DLY (2 * HZ / 100)
361 * this struct defines the different floppy drive types.
364 struct floppy_drive_params params
;
365 const char *name
; /* name printed while booting */
366 } default_drive_params
[] = {
367 /* NOTE: the time values in jiffies should be in msec!
369 | Maximum data rate supported by drive type
370 | | Head load time, msec
371 | | | Head unload time, msec (not used)
372 | | | | Step rate interval, usec
373 | | | | | Time needed for spinup time (jiffies)
374 | | | | | | Timeout for spinning down (jiffies)
375 | | | | | | | Spindown offset (where disk stops)
376 | | | | | | | | Select delay
377 | | | | | | | | | RPS
378 | | | | | | | | | | Max number of tracks
379 | | | | | | | | | | | Interrupt timeout
380 | | | | | | | | | | | | Max nonintlv. sectors
381 | | | | | | | | | | | | | -Max Errors- flags */
382 {{0, 500, 16, 16, 8000, 1*HZ
, 3*HZ
, 0, SEL_DLY
, 5, 80, 3*HZ
, 20, {3,1,2,0,2}, 0,
383 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ
/2, 0 }, "unknown" },
385 {{1, 300, 16, 16, 8000, 1*HZ
, 3*HZ
, 0, SEL_DLY
, 5, 40, 3*HZ
, 17, {3,1,2,0,2}, 0,
386 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ
/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
388 {{2, 500, 16, 16, 6000, 4*HZ
/10, 3*HZ
, 14, SEL_DLY
, 6, 83, 3*HZ
, 17, {3,1,2,0,2}, 0,
389 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ
/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
391 {{3, 250, 16, 16, 3000, 1*HZ
, 3*HZ
, 0, SEL_DLY
, 5, 83, 3*HZ
, 20, {3,1,2,0,2}, 0,
392 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ
/2, 4 }, "720k" }, /*3 1/2 DD*/
394 {{4, 500, 16, 16, 4000, 4*HZ
/10, 3*HZ
, 10, SEL_DLY
, 5, 83, 3*HZ
, 20, {3,1,2,0,2}, 0,
395 0, { 7, 4,25,22,31,21,29,11}, 3*HZ
/2, 7 }, "1.44M" }, /*3 1/2 HD*/
397 {{5, 1000, 15, 8, 3000, 4*HZ
/10, 3*HZ
, 10, SEL_DLY
, 5, 83, 3*HZ
, 40, {3,1,2,0,2}, 0,
398 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ
/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
400 {{6, 1000, 15, 8, 3000, 4*HZ
/10, 3*HZ
, 10, SEL_DLY
, 5, 83, 3*HZ
, 40, {3,1,2,0,2}, 0,
401 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ
/2, 8 }, "2.88M" } /*3 1/2 ED*/
402 /* | --autodetected formats--- | | |
403 * read_track | | Name printed when booting
405 * Frequency of disk change checks */
408 static struct floppy_drive_params drive_params
[N_DRIVE
];
409 static struct floppy_drive_struct drive_state
[N_DRIVE
];
410 static struct floppy_write_errors write_errors
[N_DRIVE
];
411 static struct timer_list motor_off_timer
[N_DRIVE
];
412 static struct gendisk
*disks
[N_DRIVE
];
413 static struct block_device
*opened_bdev
[N_DRIVE
];
414 static DEFINE_MUTEX(open_lock
);
415 static struct floppy_raw_cmd
*raw_cmd
, default_raw_cmd
;
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 #define NO_SIGNAL (!interruptible || !signal_pending(current))
519 #define CALL(x) if ((x) == -EINTR) return -EINTR
520 #define ECALL(x) if ((ret = (x))) return ret;
521 #define _WAIT(x,i) CALL(ret=wait_til_done((x),i))
522 #define WAIT(x) _WAIT((x),interruptible)
523 #define IWAIT(x) _WAIT((x),1)
525 /* Errors during formatting are counted here. */
526 static int format_errors
;
528 /* Format request descriptor. */
529 static struct format_descr format_req
;
532 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
533 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
534 * H is head unload time (1=16ms, 2=32ms, etc)
539 * Because these are written to by the DMA controller, they must
540 * not contain a 64k byte boundary crossing, or data will be
543 static char *floppy_track_buffer
;
544 static int max_buffer_sectors
;
547 typedef void (*done_f
)(int);
548 static struct cont_t
{
549 void (*interrupt
)(void);
550 /* this is called after the interrupt of the
552 void (*redo
)(void); /* this is called to retry the operation */
553 void (*error
)(void); /* this is called to tally an error */
554 done_f done
; /* this is called to say if the operation has
555 * succeeded/failed */
558 static void floppy_ready(void);
559 static void floppy_start(void);
560 static void process_fd_request(void);
561 static void recalibrate_floppy(void);
562 static void floppy_shutdown(unsigned long);
564 static int floppy_request_regions(int);
565 static void floppy_release_regions(int);
566 static int floppy_grab_irq_and_dma(void);
567 static void floppy_release_irq_and_dma(void);
570 * The "reset" variable should be tested whenever an interrupt is scheduled,
571 * after the commands have been sent. This is to ensure that the driver doesn't
572 * get wedged when the interrupt doesn't come because of a failed command.
573 * reset doesn't need to be tested before sending commands, because
574 * output_byte is automatically disabled when reset is set.
576 static void reset_fdc(void);
579 * These are global variables, as that's the easiest way to give
580 * information to interrupts. They are the data used for the current
584 #define NEED_1_RECAL -2
585 #define NEED_2_RECAL -3
587 static int usage_count
;
589 /* buffer related variables */
590 static int buffer_track
= -1;
591 static int buffer_drive
= -1;
592 static int buffer_min
= -1;
593 static int buffer_max
= -1;
595 /* fdc related variables, should end up in a struct */
596 static struct floppy_fdc_state fdc_state
[N_FDC
];
597 static int fdc
; /* current fdc */
599 static struct floppy_struct
*_floppy
= floppy_type
;
600 static unsigned char current_drive
;
601 static long current_count_sectors
;
602 static unsigned char fsector_t
; /* sector in track */
603 static unsigned char in_sector_offset
; /* offset within physical sector,
604 * expressed in units of 512 bytes */
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 *message
)
627 if (DP
->flags
& DEBUGT
)
628 pr_info("%s dtime=%lu\n", message
, jiffies
- debugtimer
);
631 static inline void set_debugt(void) { }
632 static inline void debugt(const char *message
) { }
635 typedef void (*timeout_fn
)(unsigned long);
636 static DEFINE_TIMER(fd_timeout
, floppy_shutdown
, 0, 0);
638 static const char *timeout_message
;
640 #ifdef FLOPPY_SANITY_CHECK
641 static void is_alive(const char *message
)
643 /* this routine checks whether the floppy driver is "alive" */
644 if (test_bit(0, &fdc_busy
) && command_status
< 2
645 && !timer_pending(&fd_timeout
)) {
646 DPRINT("timeout handler died: %s\n", message
);
651 static void (*do_floppy
)(void) = NULL
;
653 #ifdef FLOPPY_SANITY_CHECK
657 static void (*lasthandler
)(void);
658 static unsigned long interruptjiffies
;
659 static unsigned long resultjiffies
;
660 static int resultsize
;
661 static unsigned long lastredo
;
663 static struct output_log
{
665 unsigned char status
;
666 unsigned long jiffies
;
667 } output_log
[OLOGSIZE
];
669 static int output_log_pos
;
672 #define current_reqD -1
673 #define MAXTIMEOUT -2
675 static void __reschedule_timeout(int drive
, const char *message
, int marg
)
677 if (drive
== current_reqD
)
678 drive
= current_drive
;
679 del_timer(&fd_timeout
);
680 if (drive
< 0 || drive
>= N_DRIVE
) {
681 fd_timeout
.expires
= jiffies
+ 20UL * HZ
;
684 fd_timeout
.expires
= jiffies
+ UDP
->timeout
;
685 add_timer(&fd_timeout
);
686 if (UDP
->flags
& FD_DEBUG
)
687 DPRINT("reschedule timeout %s %d\n", message
, marg
);
688 timeout_message
= message
;
691 static void reschedule_timeout(int drive
, const char *message
, int marg
)
695 spin_lock_irqsave(&floppy_lock
, flags
);
696 __reschedule_timeout(drive
, message
, marg
);
697 spin_unlock_irqrestore(&floppy_lock
, flags
);
700 #define INFBOUND(a, b) (a) = max_t(int, a, b)
701 #define SUPBOUND(a, b) (a) = min_t(int, a, b)
704 * Bottom half floppy driver.
705 * ==========================
707 * This part of the file contains the code talking directly to the hardware,
708 * and also the main service loop (seek-configure-spinup-command)
713 * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
714 * and the last_checked date.
716 * last_checked is the date of the last check which showed 'no disk change'
717 * FD_DISK_CHANGE is set under two conditions:
718 * 1. The floppy has been changed after some i/o to that floppy already
720 * 2. No floppy disk is in the drive. This is done in order to ensure that
721 * requests are quickly flushed in case there is no disk in the drive. It
722 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
725 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
726 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
727 * each seek. If a disk is present, the disk change line should also be
728 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
729 * change line is set, this means either that no disk is in the drive, or
730 * that it has been removed since the last seek.
732 * This means that we really have a third possibility too:
733 * The floppy has been changed after the last seek.
736 static int disk_change(int drive
)
738 int fdc
= FDC(drive
);
740 #ifdef FLOPPY_SANITY_CHECK
741 if (time_before(jiffies
, UDRS
->select_date
+ UDP
->select_delay
))
742 DPRINT("WARNING disk change called early\n");
743 if (!(FDCS
->dor
& (0x10 << UNIT(drive
))) ||
744 (FDCS
->dor
& 3) != UNIT(drive
) || fdc
!= FDC(drive
)) {
745 DPRINT("probing disk change on unselected drive\n");
746 DPRINT("drive=%d fdc=%d dor=%x\n", drive
, FDC(drive
),
747 (unsigned int)FDCS
->dor
);
752 if (UDP
->flags
& FD_DEBUG
) {
753 DPRINT("checking disk change line for drive %d\n", drive
);
754 DPRINT("jiffies=%lu\n", jiffies
);
755 DPRINT("disk change line=%x\n", fd_inb(FD_DIR
) & 0x80);
756 DPRINT("flags=%lx\n", UDRS
->flags
);
759 if (UDP
->flags
& FD_BROKEN_DCL
)
760 return UTESTF(FD_DISK_CHANGED
);
761 if ((fd_inb(FD_DIR
) ^ UDP
->flags
) & 0x80) {
762 USETF(FD_VERIFY
); /* verify write protection */
763 if (UDRS
->maxblock
) {
764 /* mark it changed */
765 USETF(FD_DISK_CHANGED
);
768 /* invalidate its geometry */
769 if (UDRS
->keep_data
>= 0) {
770 if ((UDP
->flags
& FTD_MSG
) &&
771 current_type
[drive
] != NULL
)
772 DPRINT("Disk type is undefined after "
774 current_type
[drive
] = NULL
;
775 floppy_sizes
[TOMINOR(drive
)] = MAX_DISK_SIZE
<< 1;
780 UDRS
->last_checked
= jiffies
;
781 UCLEARF(FD_DISK_NEWCHANGE
);
786 static inline int is_selected(int dor
, int unit
)
788 return ((dor
& (0x10 << unit
)) && (dor
& 3) == unit
);
791 static int set_dor(int fdc
, char mask
, char data
)
795 unsigned char newdor
;
796 unsigned char olddor
;
798 if (FDCS
->address
== -1)
802 newdor
= (olddor
& mask
) | data
;
803 if (newdor
!= olddor
) {
805 if (is_selected(olddor
, unit
) && !is_selected(newdor
, unit
)) {
806 drive
= REVDRIVE(fdc
, unit
);
808 if (UDP
->flags
& FD_DEBUG
)
809 DPRINT("calling disk change from set_dor\n");
814 fd_outb(newdor
, FD_DOR
);
817 if (!is_selected(olddor
, unit
) && is_selected(newdor
, unit
)) {
818 drive
= REVDRIVE(fdc
, unit
);
819 UDRS
->select_date
= jiffies
;
825 static void twaddle(void)
827 if (DP
->select_delay
)
829 fd_outb(FDCS
->dor
& ~(0x10 << UNIT(current_drive
)), FD_DOR
);
830 fd_outb(FDCS
->dor
, FD_DOR
);
831 DRS
->select_date
= jiffies
;
834 /* reset all driver information about the current fdc. This is needed after
835 * a reset, and after a raw command. */
836 static void reset_fdc_info(int mode
)
840 FDCS
->spec1
= FDCS
->spec2
= -1;
841 FDCS
->need_configure
= 1;
844 for (drive
= 0; drive
< N_DRIVE
; drive
++)
845 if (FDC(drive
) == fdc
&& (mode
|| UDRS
->track
!= NEED_1_RECAL
))
846 UDRS
->track
= NEED_2_RECAL
;
849 /* selects the fdc and drive, and enables the fdc's input/dma. */
850 static void set_fdc(int drive
)
852 if (drive
>= 0 && drive
< N_DRIVE
) {
854 current_drive
= drive
;
856 if (fdc
!= 1 && fdc
!= 0) {
857 pr_info("bad fdc value\n");
862 set_dor(1 - fdc
, ~8, 0);
864 if (FDCS
->rawcmd
== 2)
866 if (fd_inb(FD_STATUS
) != STATUS_READY
)
870 /* locks the driver */
871 static int _lock_fdc(int drive
, int interruptible
, int line
)
874 pr_err("Trying to lock fdc while usage count=0 at line %d\n",
879 if (test_and_set_bit(0, &fdc_busy
)) {
880 DECLARE_WAITQUEUE(wait
, current
);
881 add_wait_queue(&fdc_wait
, &wait
);
884 set_current_state(TASK_INTERRUPTIBLE
);
886 if (!test_and_set_bit(0, &fdc_busy
))
892 remove_wait_queue(&fdc_wait
, &wait
);
897 set_current_state(TASK_RUNNING
);
898 remove_wait_queue(&fdc_wait
, &wait
);
899 flush_scheduled_work();
901 command_status
= FD_COMMAND_NONE
;
903 __reschedule_timeout(drive
, "lock fdc", 0);
908 #define lock_fdc(drive, interruptible) \
909 _lock_fdc(drive, interruptible, __LINE__)
911 #define LOCK_FDC(drive, interruptible) \
912 if (lock_fdc(drive, interruptible)) \
915 /* unlocks the driver */
916 static inline void unlock_fdc(void)
921 if (!test_bit(0, &fdc_busy
))
922 DPRINT("FDC access conflict!\n");
925 DPRINT("device interrupt still active at FDC release: %p!\n",
927 command_status
= FD_COMMAND_NONE
;
928 spin_lock_irqsave(&floppy_lock
, flags
);
929 del_timer(&fd_timeout
);
931 clear_bit(0, &fdc_busy
);
932 if (current_req
|| blk_peek_request(floppy_queue
))
933 do_fd_request(floppy_queue
);
934 spin_unlock_irqrestore(&floppy_lock
, flags
);
938 /* switches the motor off after a given timeout */
939 static void motor_off_callback(unsigned long nr
)
941 unsigned char mask
= ~(0x10 << UNIT(nr
));
943 set_dor(FDC(nr
), mask
, 0);
946 /* schedules motor off */
947 static void floppy_off(unsigned int drive
)
949 unsigned long volatile delta
;
950 int fdc
= FDC(drive
);
952 if (!(FDCS
->dor
& (0x10 << UNIT(drive
))))
955 del_timer(motor_off_timer
+ drive
);
957 /* make spindle stop in a position which minimizes spinup time
960 delta
= jiffies
- UDRS
->first_read_date
+ HZ
-
961 UDP
->spindown_offset
;
962 delta
= ((delta
* UDP
->rps
) % HZ
) / UDP
->rps
;
963 motor_off_timer
[drive
].expires
=
964 jiffies
+ UDP
->spindown
- delta
;
966 add_timer(motor_off_timer
+ drive
);
970 * cycle through all N_DRIVE floppy drives, for disk change testing.
971 * stopping at current drive. This is done before any long operation, to
972 * be sure to have up to date disk change information.
974 static void scandrives(void)
980 if (DP
->select_delay
)
983 saved_drive
= current_drive
;
984 for (i
= 0; i
< N_DRIVE
; i
++) {
985 drive
= (saved_drive
+ i
+ 1) % N_DRIVE
;
986 if (UDRS
->fd_ref
== 0 || UDP
->select_delay
!= 0)
987 continue; /* skip closed drives */
989 if (!(set_dor(fdc
, ~3, UNIT(drive
) | (0x10 << UNIT(drive
))) &
990 (0x10 << UNIT(drive
))))
991 /* switch the motor off again, if it was off to
993 set_dor(fdc
, ~(0x10 << UNIT(drive
)), 0);
995 set_fdc(saved_drive
);
998 static void empty(void)
1002 static DECLARE_WORK(floppy_work
, NULL
);
1004 static void schedule_bh(void (*handler
)(void))
1006 PREPARE_WORK(&floppy_work
, (work_func_t
)handler
);
1007 schedule_work(&floppy_work
);
1010 static DEFINE_TIMER(fd_timer
, NULL
, 0, 0);
1012 static void cancel_activity(void)
1014 unsigned long flags
;
1016 spin_lock_irqsave(&floppy_lock
, flags
);
1018 PREPARE_WORK(&floppy_work
, (work_func_t
)empty
);
1019 del_timer(&fd_timer
);
1020 spin_unlock_irqrestore(&floppy_lock
, flags
);
1023 /* this function makes sure that the disk stays in the drive during the
1025 static void fd_watchdog(void)
1028 if (DP
->flags
& FD_DEBUG
)
1029 DPRINT("calling disk change from watchdog\n");
1032 if (disk_change(current_drive
)) {
1033 DPRINT("disk removed during i/o\n");
1038 del_timer(&fd_timer
);
1039 fd_timer
.function
= (timeout_fn
)fd_watchdog
;
1040 fd_timer
.expires
= jiffies
+ HZ
/ 10;
1041 add_timer(&fd_timer
);
1045 static void main_command_interrupt(void)
1047 del_timer(&fd_timer
);
1051 /* waits for a delay (spinup or select) to pass */
1052 static int fd_wait_for_completion(unsigned long delay
, timeout_fn function
)
1055 reset_fdc(); /* do the reset during sleep to win time
1056 * if we don't need to sleep, it's a good
1057 * occasion anyways */
1061 if (time_before(jiffies
, delay
)) {
1062 del_timer(&fd_timer
);
1063 fd_timer
.function
= function
;
1064 fd_timer
.expires
= delay
;
1065 add_timer(&fd_timer
);
1071 static DEFINE_SPINLOCK(floppy_hlt_lock
);
1072 static int hlt_disabled
;
1073 static void floppy_disable_hlt(void)
1075 unsigned long flags
;
1077 spin_lock_irqsave(&floppy_hlt_lock
, flags
);
1078 if (!hlt_disabled
) {
1080 #ifdef HAVE_DISABLE_HLT
1084 spin_unlock_irqrestore(&floppy_hlt_lock
, flags
);
1087 static void floppy_enable_hlt(void)
1089 unsigned long flags
;
1091 spin_lock_irqsave(&floppy_hlt_lock
, flags
);
1094 #ifdef HAVE_DISABLE_HLT
1098 spin_unlock_irqrestore(&floppy_hlt_lock
, flags
);
1101 static void setup_DMA(void)
1105 #ifdef FLOPPY_SANITY_CHECK
1106 if (raw_cmd
->length
== 0) {
1109 pr_info("zero dma transfer size:");
1110 for (i
= 0; i
< raw_cmd
->cmd_count
; i
++)
1111 pr_cont("%x,", raw_cmd
->cmd
[i
]);
1117 if (((unsigned long)raw_cmd
->kernel_data
) % 512) {
1118 pr_info("non aligned address: %p\n", raw_cmd
->kernel_data
);
1124 f
= claim_dma_lock();
1127 if (fd_dma_setup(raw_cmd
->kernel_data
, raw_cmd
->length
,
1128 (raw_cmd
->flags
& FD_RAW_READ
) ?
1129 DMA_MODE_READ
: DMA_MODE_WRITE
, FDCS
->address
) < 0) {
1130 release_dma_lock(f
);
1135 release_dma_lock(f
);
1138 fd_cacheflush(raw_cmd
->kernel_data
, raw_cmd
->length
);
1139 fd_set_dma_mode((raw_cmd
->flags
& FD_RAW_READ
) ?
1140 DMA_MODE_READ
: DMA_MODE_WRITE
);
1141 fd_set_dma_addr(raw_cmd
->kernel_data
);
1142 fd_set_dma_count(raw_cmd
->length
);
1143 virtual_dma_port
= FDCS
->address
;
1145 release_dma_lock(f
);
1147 floppy_disable_hlt();
1150 static void show_floppy(void);
1152 /* waits until the fdc becomes ready */
1153 static int wait_til_ready(void)
1160 for (counter
= 0; counter
< 10000; counter
++) {
1161 status
= fd_inb(FD_STATUS
);
1162 if (status
& STATUS_READY
)
1165 if (!initialising
) {
1166 DPRINT("Getstatus times out (%x) on fdc %d\n", status
, fdc
);
1173 /* sends a command byte to the fdc */
1174 static int output_byte(char byte
)
1176 int status
= wait_til_ready();
1180 if ((status
& (STATUS_READY
| STATUS_DIR
| STATUS_DMA
)) == STATUS_READY
) {
1181 fd_outb(byte
, FD_DATA
);
1182 #ifdef FLOPPY_SANITY_CHECK
1183 output_log
[output_log_pos
].data
= byte
;
1184 output_log
[output_log_pos
].status
= status
;
1185 output_log
[output_log_pos
].jiffies
= jiffies
;
1186 output_log_pos
= (output_log_pos
+ 1) % OLOGSIZE
;
1191 if (!initialising
) {
1192 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
1199 /* gets the response from the fdc */
1200 static int result(void)
1205 for (i
= 0; i
< MAX_REPLIES
; i
++) {
1206 status
= wait_til_ready();
1209 status
&= STATUS_DIR
| STATUS_READY
| STATUS_BUSY
| STATUS_DMA
;
1210 if ((status
& ~STATUS_BUSY
) == STATUS_READY
) {
1211 #ifdef FLOPPY_SANITY_CHECK
1212 resultjiffies
= jiffies
;
1217 if (status
== (STATUS_DIR
| STATUS_READY
| STATUS_BUSY
))
1218 reply_buffer
[i
] = fd_inb(FD_DATA
);
1222 if (!initialising
) {
1224 ("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
1232 #define MORE_OUTPUT -2
1233 /* does the fdc need more output? */
1234 static int need_more_output(void)
1236 int status
= wait_til_ready();
1240 if ((status
& (STATUS_READY
| STATUS_DIR
| STATUS_DMA
)) == STATUS_READY
)
1245 /* Set perpendicular mode as required, based on data rate, if supported.
1246 * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1248 static inline void perpendicular_mode(void)
1250 unsigned char perp_mode
;
1252 if (raw_cmd
->rate
& 0x40) {
1253 switch (raw_cmd
->rate
& 3) {
1261 DPRINT("Invalid data rate for perpendicular mode!\n");
1265 * convenient way to return to
1266 * redo without too much hassle
1267 * (deep stack et al.)
1274 if (FDCS
->perp_mode
== perp_mode
)
1276 if (FDCS
->version
>= FDC_82077_ORIG
) {
1277 output_byte(FD_PERPENDICULAR
);
1278 output_byte(perp_mode
);
1279 FDCS
->perp_mode
= perp_mode
;
1280 } else if (perp_mode
) {
1281 DPRINT("perpendicular mode not supported by this FDC.\n");
1283 } /* perpendicular_mode */
1285 static int fifo_depth
= 0xa;
1288 static int fdc_configure(void)
1291 output_byte(FD_CONFIGURE
);
1292 if (need_more_output() != MORE_OUTPUT
)
1295 output_byte(0x10 | (no_fifo
& 0x20) | (fifo_depth
& 0xf));
1296 output_byte(0); /* pre-compensation from track
1301 #define NOMINAL_DTR 500
1303 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1304 * head load time, and DMA disable flag to values needed by floppy.
1306 * The value "dtr" is the data transfer rate in Kbps. It is needed
1307 * to account for the data rate-based scaling done by the 82072 and 82077
1308 * FDC types. This parameter is ignored for other types of FDCs (i.e.
1311 * Note that changing the data transfer rate has a (probably deleterious)
1312 * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1313 * fdc_specify is called again after each data transfer rate
1316 * srt: 1000 to 16000 in microseconds
1317 * hut: 16 to 240 milliseconds
1318 * hlt: 2 to 254 milliseconds
1320 * These values are rounded up to the next highest available delay time.
1322 static void fdc_specify(void)
1324 unsigned char spec1
;
1325 unsigned char spec2
;
1329 unsigned long dtr
= NOMINAL_DTR
;
1330 unsigned long scale_dtr
= NOMINAL_DTR
;
1331 int hlt_max_code
= 0x7f;
1332 int hut_max_code
= 0xf;
1334 if (FDCS
->need_configure
&& FDCS
->version
>= FDC_82072A
) {
1336 FDCS
->need_configure
= 0;
1339 switch (raw_cmd
->rate
& 0x03) {
1345 if (FDCS
->version
>= FDC_82078
) {
1346 /* chose the default rate table, not the one
1347 * where 1 = 2 Mbps */
1348 output_byte(FD_DRIVESPEC
);
1349 if (need_more_output() == MORE_OUTPUT
) {
1350 output_byte(UNIT(current_drive
));
1360 if (FDCS
->version
>= FDC_82072
) {
1362 hlt_max_code
= 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1363 hut_max_code
= 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1366 /* Convert step rate from microseconds to milliseconds and 4 bits */
1367 srt
= 16 - DIV_ROUND_UP(DP
->srt
* scale_dtr
/ 1000, NOMINAL_DTR
);
1374 hlt
= DIV_ROUND_UP(DP
->hlt
* scale_dtr
/ 2, NOMINAL_DTR
);
1377 else if (hlt
> 0x7f)
1380 hut
= DIV_ROUND_UP(DP
->hut
* scale_dtr
/ 16, NOMINAL_DTR
);
1386 spec1
= (srt
<< 4) | hut
;
1387 spec2
= (hlt
<< 1) | (use_virtual_dma
& 1);
1389 /* If these parameters did not change, just return with success */
1390 if (FDCS
->spec1
!= spec1
|| FDCS
->spec2
!= spec2
) {
1391 /* Go ahead and set spec1 and spec2 */
1392 output_byte(FD_SPECIFY
);
1393 output_byte(FDCS
->spec1
= spec1
);
1394 output_byte(FDCS
->spec2
= spec2
);
1398 /* Set the FDC's data transfer rate on behalf of the specified drive.
1399 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1400 * of the specify command (i.e. using the fdc_specify function).
1402 static int fdc_dtr(void)
1404 /* If data rate not already set to desired value, set it. */
1405 if ((raw_cmd
->rate
& 3) == FDCS
->dtr
)
1409 fd_outb(raw_cmd
->rate
& 3, FD_DCR
);
1411 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1412 * need a stabilization period of several milliseconds to be
1413 * enforced after data rate changes before R/W operations.
1414 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1416 FDCS
->dtr
= raw_cmd
->rate
& 3;
1417 return fd_wait_for_completion(jiffies
+ 2UL * HZ
/ 100,
1418 (timeout_fn
)floppy_ready
);
1421 static void tell_sector(void)
1423 pr_cont(": track %d, head %d, sector %d, size %d",
1424 R_TRACK
, R_HEAD
, R_SECTOR
, R_SIZECODE
);
1427 static void print_errors(void)
1430 if (ST0
& ST0_ECE
) {
1431 pr_cont("Recalibrate failed!");
1432 } else if (ST2
& ST2_CRC
) {
1433 pr_cont("data CRC error");
1435 } else if (ST1
& ST1_CRC
) {
1436 pr_cont("CRC error");
1438 } else if ((ST1
& (ST1_MAM
| ST1_ND
)) ||
1441 pr_cont("sector not found");
1444 pr_cont("probe failed...");
1445 } else if (ST2
& ST2_WC
) { /* seek error */
1446 pr_cont("wrong cylinder");
1447 } else if (ST2
& ST2_BC
) { /* cylinder marked as bad */
1448 pr_cont("bad cylinder");
1450 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
1458 * OK, this error interpreting routine is called after a
1459 * DMA read/write has succeeded
1460 * or failed, so we check the results, and copy any buffers.
1461 * hhb: Added better error reporting.
1462 * ak: Made this into a separate routine.
1464 static int interpret_errors(void)
1469 DPRINT("-- FDC reply error");
1474 /* check IC to find cause of interrupt */
1475 switch (ST0
& ST0_INTR
) {
1476 case 0x40: /* error occurred during command execution */
1478 return 0; /* occurs with pseudo-DMA */
1481 DPRINT("Drive is write protected\n");
1482 CLEARF(FD_DISK_WRITABLE
);
1485 } else if (ST1
& ST1_ND
) {
1486 SETF(FD_NEED_TWADDLE
);
1487 } else if (ST1
& ST1_OR
) {
1488 if (DP
->flags
& FTD_MSG
)
1489 DPRINT("Over/Underrun - retrying\n");
1491 } else if (*errors
>= DP
->max_errors
.reporting
) {
1494 if (ST2
& ST2_WC
|| ST2
& ST2_BC
)
1495 /* wrong cylinder => recal */
1496 DRS
->track
= NEED_2_RECAL
;
1498 case 0x80: /* invalid command given */
1499 DPRINT("Invalid FDC command given!\n");
1503 DPRINT("Abnormal termination caused by polling\n");
1506 default: /* (0) Normal command termination */
1512 * This routine is called when everything should be correctly set up
1513 * for the transfer (i.e. floppy motor is on, the correct floppy is
1514 * selected, and the head is sitting on the right track).
1516 static void setup_rw_floppy(void)
1522 unsigned long ready_date
;
1523 timeout_fn function
;
1525 flags
= raw_cmd
->flags
;
1526 if (flags
& (FD_RAW_READ
| FD_RAW_WRITE
))
1527 flags
|= FD_RAW_INTR
;
1529 if ((flags
& FD_RAW_SPIN
) && !(flags
& FD_RAW_NO_MOTOR
)) {
1530 ready_date
= DRS
->spinup_date
+ DP
->spinup
;
1531 /* If spinup will take a long time, rerun scandrives
1532 * again just before spinup completion. Beware that
1533 * after scandrives, we must again wait for selection.
1535 if (time_after(ready_date
, jiffies
+ DP
->select_delay
)) {
1536 ready_date
-= DP
->select_delay
;
1537 function
= (timeout_fn
)floppy_start
;
1539 function
= (timeout_fn
)setup_rw_floppy
;
1541 /* wait until the floppy is spinning fast enough */
1542 if (fd_wait_for_completion(ready_date
, function
))
1545 dflags
= DRS
->flags
;
1547 if ((flags
& FD_RAW_READ
) || (flags
& FD_RAW_WRITE
))
1550 if (flags
& FD_RAW_INTR
)
1551 do_floppy
= main_command_interrupt
;
1554 for (i
= 0; i
< raw_cmd
->cmd_count
; i
++)
1555 r
|= output_byte(raw_cmd
->cmd
[i
]);
1557 debugt("rw_command: ");
1565 if (!(flags
& FD_RAW_INTR
)) {
1568 } else if (flags
& FD_RAW_NEED_DISK
)
1572 static int blind_seek
;
1575 * This is the routine called after every seek (or recalibrate) interrupt
1576 * from the floppy controller.
1578 static void seek_interrupt(void)
1580 debugt("seek interrupt:");
1581 if (inr
!= 2 || (ST0
& 0xF8) != 0x20) {
1582 DPRINT("seek failed\n");
1583 DRS
->track
= NEED_2_RECAL
;
1588 if (DRS
->track
>= 0 && DRS
->track
!= ST1
&& !blind_seek
) {
1590 if (DP
->flags
& FD_DEBUG
) {
1591 DPRINT("clearing NEWCHANGE flag because of effective seek\n");
1592 DPRINT("jiffies=%lu\n", jiffies
);
1595 CLEARF(FD_DISK_NEWCHANGE
); /* effective seek */
1596 DRS
->select_date
= jiffies
;
1602 static void check_wp(void)
1604 if (TESTF(FD_VERIFY
)) {
1605 /* check write protection */
1606 output_byte(FD_GETSTATUS
);
1607 output_byte(UNIT(current_drive
));
1608 if (result() != 1) {
1613 CLEARF(FD_NEED_TWADDLE
);
1615 if (DP
->flags
& FD_DEBUG
) {
1616 DPRINT("checking whether disk is write protected\n");
1617 DPRINT("wp=%x\n", ST3
& 0x40);
1621 SETF(FD_DISK_WRITABLE
);
1623 CLEARF(FD_DISK_WRITABLE
);
1627 static void seek_floppy(void)
1634 if (DP
->flags
& FD_DEBUG
)
1635 DPRINT("calling disk change from seek\n");
1638 if (!TESTF(FD_DISK_NEWCHANGE
) &&
1639 disk_change(current_drive
) && (raw_cmd
->flags
& FD_RAW_NEED_DISK
)) {
1640 /* the media changed flag should be cleared after the seek.
1641 * If it isn't, this means that there is really no disk in
1644 SETF(FD_DISK_CHANGED
);
1649 if (DRS
->track
<= NEED_1_RECAL
) {
1650 recalibrate_floppy();
1652 } else if (TESTF(FD_DISK_NEWCHANGE
) &&
1653 (raw_cmd
->flags
& FD_RAW_NEED_DISK
) &&
1654 (DRS
->track
<= NO_TRACK
|| DRS
->track
== raw_cmd
->track
)) {
1655 /* we seek to clear the media-changed condition. Does anybody
1656 * know a more elegant way, which works on all drives? */
1658 track
= raw_cmd
->track
- 1;
1660 if (DP
->flags
& FD_SILENT_DCL_CLEAR
) {
1661 set_dor(fdc
, ~(0x10 << UNIT(current_drive
)), 0);
1663 raw_cmd
->flags
|= FD_RAW_NEED_SEEK
;
1669 if (raw_cmd
->track
!= DRS
->track
&&
1670 (raw_cmd
->flags
& FD_RAW_NEED_SEEK
))
1671 track
= raw_cmd
->track
;
1678 do_floppy
= seek_interrupt
;
1679 output_byte(FD_SEEK
);
1680 output_byte(UNIT(current_drive
));
1681 if (output_byte(track
) < 0) {
1685 debugt("seek command:");
1688 static void recal_interrupt(void)
1690 debugt("recal interrupt:");
1693 else if (ST0
& ST0_ECE
) {
1694 switch (DRS
->track
) {
1696 debugt("recal interrupt need 1 recal:");
1697 /* after a second recalibrate, we still haven't
1698 * reached track 0. Probably no drive. Raise an
1699 * error, as failing immediately might upset
1700 * computers possessed by the Devil :-) */
1705 debugt("recal interrupt need 2 recal:");
1706 /* If we already did a recalibrate,
1707 * and we are not at track 0, this
1708 * means we have moved. (The only way
1709 * not to move at recalibration is to
1710 * be already at track 0.) Clear the
1711 * new change flag */
1713 if (DP
->flags
& FD_DEBUG
)
1714 DPRINT("clearing NEWCHANGE flag because of second recalibrate\n");
1717 CLEARF(FD_DISK_NEWCHANGE
);
1718 DRS
->select_date
= jiffies
;
1721 debugt("recal interrupt default:");
1722 /* Recalibrate moves the head by at
1723 * most 80 steps. If after one
1724 * recalibrate we don't have reached
1725 * track 0, this might mean that we
1726 * started beyond track 80. Try
1728 DRS
->track
= NEED_1_RECAL
;
1736 static void print_result(char *message
, int inr
)
1740 DPRINT("%s ", message
);
1742 for (i
= 0; i
< inr
; i
++)
1743 pr_cont("repl[%d]=%x ", i
, reply_buffer
[i
]);
1747 /* interrupt handler. Note that this can be called externally on the Sparc */
1748 irqreturn_t
floppy_interrupt(int irq
, void *dev_id
)
1752 void (*handler
)(void) = do_floppy
;
1754 lasthandler
= handler
;
1755 interruptjiffies
= jiffies
;
1757 f
= claim_dma_lock();
1759 release_dma_lock(f
);
1761 floppy_enable_hlt();
1763 if (fdc
>= N_FDC
|| FDCS
->address
== -1) {
1764 /* we don't even know which FDC is the culprit */
1765 pr_info("DOR0=%x\n", fdc_state
[0].dor
);
1766 pr_info("floppy interrupt on bizarre fdc %d\n", fdc
);
1767 pr_info("handler=%p\n", handler
);
1768 is_alive("bizarre fdc");
1773 /* We have to clear the reset flag here, because apparently on boxes
1774 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
1775 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
1776 * emission of the SENSEI's.
1777 * It is OK to emit floppy commands because we are in an interrupt
1778 * handler here, and thus we have to fear no interference of other
1782 do_print
= !handler
&& print_unex
&& !initialising
;
1786 print_result("unexpected interrupt", inr
);
1790 output_byte(FD_SENSEI
);
1793 print_result("sensei", inr
);
1795 } while ((ST0
& 0x83) != UNIT(current_drive
) && inr
== 2
1802 schedule_bh(handler
);
1803 is_alive("normal interrupt end");
1805 /* FIXME! Was it really for us? */
1809 static void recalibrate_floppy(void)
1811 debugt("recalibrate floppy:");
1812 do_floppy
= recal_interrupt
;
1813 output_byte(FD_RECALIBRATE
);
1814 if (output_byte(UNIT(current_drive
)) < 0) {
1821 * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1823 static void reset_interrupt(void)
1825 debugt("reset interrupt:");
1826 result(); /* get the status ready for set_fdc */
1828 pr_info("reset set in interrupt, calling %p\n", cont
->error
);
1829 cont
->error(); /* a reset just after a reset. BAD! */
1835 * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1836 * or by setting the self clearing bit 7 of STATUS (newer FDCs)
1838 static void reset_fdc(void)
1840 unsigned long flags
;
1842 do_floppy
= reset_interrupt
;
1846 /* Pseudo-DMA may intercept 'reset finished' interrupt. */
1847 /* Irrelevant for systems with true DMA (i386). */
1849 flags
= claim_dma_lock();
1851 release_dma_lock(flags
);
1853 if (FDCS
->version
>= FDC_82072A
)
1854 fd_outb(0x80 | (FDCS
->dtr
& 3), FD_STATUS
);
1856 fd_outb(FDCS
->dor
& ~0x04, FD_DOR
);
1857 udelay(FD_RESET_DELAY
);
1858 fd_outb(FDCS
->dor
, FD_DOR
);
1862 static void show_floppy(void)
1867 pr_info("floppy driver state\n");
1868 pr_info("-------------------\n");
1869 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n",
1870 jiffies
, interruptjiffies
, jiffies
- interruptjiffies
,
1873 #ifdef FLOPPY_SANITY_CHECK
1874 pr_info("timeout_message=%s\n", timeout_message
);
1875 pr_info("last output bytes:\n");
1876 for (i
= 0; i
< OLOGSIZE
; i
++)
1877 pr_info("%2x %2x %lu\n",
1878 output_log
[(i
+ output_log_pos
) % OLOGSIZE
].data
,
1879 output_log
[(i
+ output_log_pos
) % OLOGSIZE
].status
,
1880 output_log
[(i
+ output_log_pos
) % OLOGSIZE
].jiffies
);
1881 pr_info("last result at %lu\n", resultjiffies
);
1882 pr_info("last redo_fd_request at %lu\n", lastredo
);
1883 print_hex_dump(KERN_INFO
, "", DUMP_PREFIX_NONE
, 16, 1,
1884 reply_buffer
, resultsize
, true);
1887 pr_info("status=%x\n", fd_inb(FD_STATUS
));
1888 pr_info("fdc_busy=%lu\n", fdc_busy
);
1890 pr_info("do_floppy=%p\n", do_floppy
);
1891 if (work_pending(&floppy_work
))
1892 pr_info("floppy_work.func=%p\n", floppy_work
.func
);
1893 if (timer_pending(&fd_timer
))
1894 pr_info("fd_timer.function=%p\n", fd_timer
.function
);
1895 if (timer_pending(&fd_timeout
)) {
1896 pr_info("timer_function=%p\n", fd_timeout
.function
);
1897 pr_info("expires=%lu\n", fd_timeout
.expires
- jiffies
);
1898 pr_info("now=%lu\n", jiffies
);
1900 pr_info("cont=%p\n", cont
);
1901 pr_info("current_req=%p\n", current_req
);
1902 pr_info("command_status=%d\n", command_status
);
1906 static void floppy_shutdown(unsigned long data
)
1908 unsigned long flags
;
1914 floppy_enable_hlt();
1916 flags
= claim_dma_lock();
1918 release_dma_lock(flags
);
1920 /* avoid dma going to a random drive after shutdown */
1923 DPRINT("floppy timeout called\n");
1927 cont
->redo(); /* this will recall reset when needed */
1929 pr_info("no cont in shutdown!\n");
1930 process_fd_request();
1932 is_alive("floppy shutdown");
1935 /* start motor, check media-changed condition and write protection */
1936 static int start_motor(void (*function
)(void))
1942 data
= UNIT(current_drive
);
1943 if (!(raw_cmd
->flags
& FD_RAW_NO_MOTOR
)) {
1944 if (!(FDCS
->dor
& (0x10 << UNIT(current_drive
)))) {
1946 /* no read since this drive is running */
1947 DRS
->first_read_date
= 0;
1948 /* note motor start time if motor is not yet running */
1949 DRS
->spinup_date
= jiffies
;
1950 data
|= (0x10 << UNIT(current_drive
));
1952 } else if (FDCS
->dor
& (0x10 << UNIT(current_drive
)))
1953 mask
&= ~(0x10 << UNIT(current_drive
));
1955 /* starts motor and selects floppy */
1956 del_timer(motor_off_timer
+ current_drive
);
1957 set_dor(fdc
, mask
, data
);
1959 /* wait_for_completion also schedules reset if needed. */
1960 return fd_wait_for_completion(DRS
->select_date
+ DP
->select_delay
,
1961 (timeout_fn
)function
);
1964 static void floppy_ready(void)
1970 if (start_motor(floppy_ready
))
1976 if (DP
->flags
& FD_DEBUG
)
1977 DPRINT("calling disk change from floppy_ready\n");
1979 if (!(raw_cmd
->flags
& FD_RAW_NO_MOTOR
) &&
1980 disk_change(current_drive
) && !DP
->select_delay
)
1981 twaddle(); /* this clears the dcl on certain
1982 * drive/controller combinations */
1984 #ifdef fd_chose_dma_mode
1985 if ((raw_cmd
->flags
& FD_RAW_READ
) || (raw_cmd
->flags
& FD_RAW_WRITE
)) {
1986 unsigned long flags
= claim_dma_lock();
1987 fd_chose_dma_mode(raw_cmd
->kernel_data
, raw_cmd
->length
);
1988 release_dma_lock(flags
);
1992 if (raw_cmd
->flags
& (FD_RAW_NEED_SEEK
| FD_RAW_NEED_DISK
)) {
1993 perpendicular_mode();
1994 fdc_specify(); /* must be done here because of hut, hlt ... */
1997 if ((raw_cmd
->flags
& FD_RAW_READ
) ||
1998 (raw_cmd
->flags
& FD_RAW_WRITE
))
2004 static void floppy_start(void)
2006 reschedule_timeout(current_reqD
, "floppy start", 0);
2010 if (DP
->flags
& FD_DEBUG
)
2011 DPRINT("setting NEWCHANGE in floppy_start\n");
2013 SETF(FD_DISK_NEWCHANGE
);
2018 * ========================================================================
2019 * here ends the bottom half. Exported routines are:
2020 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
2021 * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
2022 * Initialization also uses output_byte, result, set_dor, floppy_interrupt
2024 * ========================================================================
2027 * General purpose continuations.
2028 * ==============================
2031 static void do_wakeup(void)
2033 reschedule_timeout(MAXTIMEOUT
, "do wakeup", 0);
2035 command_status
+= 2;
2036 wake_up(&command_done
);
2039 static struct cont_t wakeup_cont
= {
2043 .done
= (done_f
)empty
2046 static struct cont_t intr_cont
= {
2048 .redo
= process_fd_request
,
2050 .done
= (done_f
)empty
2053 static int wait_til_done(void (*handler
)(void), int interruptible
)
2057 schedule_bh(handler
);
2059 if (command_status
< 2 && NO_SIGNAL
) {
2060 DECLARE_WAITQUEUE(wait
, current
);
2062 add_wait_queue(&command_done
, &wait
);
2064 set_current_state(interruptible
?
2065 TASK_INTERRUPTIBLE
:
2066 TASK_UNINTERRUPTIBLE
);
2068 if (command_status
>= 2 || !NO_SIGNAL
)
2071 is_alive("wait_til_done");
2075 set_current_state(TASK_RUNNING
);
2076 remove_wait_queue(&command_done
, &wait
);
2079 if (command_status
< 2) {
2087 command_status
= FD_COMMAND_ERROR
;
2088 if (command_status
== FD_COMMAND_OKAY
)
2092 command_status
= FD_COMMAND_NONE
;
2096 static void generic_done(int result
)
2098 command_status
= result
;
2099 cont
= &wakeup_cont
;
2102 static void generic_success(void)
2107 static void generic_failure(void)
2112 static void success_and_wakeup(void)
2119 * formatting and rw support.
2120 * ==========================
2123 static int next_valid_format(void)
2127 probed_format
= DRS
->probed_format
;
2129 if (probed_format
>= 8 || !DP
->autodetect
[probed_format
]) {
2130 DRS
->probed_format
= 0;
2133 if (floppy_type
[DP
->autodetect
[probed_format
]].sect
) {
2134 DRS
->probed_format
= probed_format
;
2141 static void bad_flp_intr(void)
2146 DRS
->probed_format
++;
2147 if (!next_valid_format())
2150 err_count
= ++(*errors
);
2151 INFBOUND(DRWE
->badness
, err_count
);
2152 if (err_count
> DP
->max_errors
.abort
)
2154 if (err_count
> DP
->max_errors
.reset
)
2156 else if (err_count
> DP
->max_errors
.recal
)
2157 DRS
->track
= NEED_2_RECAL
;
2160 static void set_floppy(int drive
)
2162 int type
= ITYPE(UDRS
->fd_device
);
2165 _floppy
= floppy_type
+ type
;
2167 _floppy
= current_type
[drive
];
2171 * formatting support.
2172 * ===================
2174 static void format_interrupt(void)
2176 switch (interpret_errors()) {
2187 #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2)
2188 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1))
2189 #define CT(x) ((x) | 0xc0)
2191 static void setup_format_params(int track
)
2199 unsigned char track
, head
, sect
, size
;
2200 } *here
= (struct fparm
*)floppy_track_buffer
;
2202 raw_cmd
= &default_raw_cmd
;
2203 raw_cmd
->track
= track
;
2205 raw_cmd
->flags
= (FD_RAW_WRITE
| FD_RAW_INTR
| FD_RAW_SPIN
|
2206 FD_RAW_NEED_DISK
| FD_RAW_NEED_SEEK
);
2207 raw_cmd
->rate
= _floppy
->rate
& 0x43;
2208 raw_cmd
->cmd_count
= NR_F
;
2209 COMMAND
= FM_MODE(_floppy
, FD_FORMAT
);
2210 DR_SELECT
= UNIT(current_drive
) + PH_HEAD(_floppy
, format_req
.head
);
2211 F_SIZECODE
= FD_SIZECODE(_floppy
);
2212 F_SECT_PER_TRACK
= _floppy
->sect
<< 2 >> F_SIZECODE
;
2213 F_GAP
= _floppy
->fmt_gap
;
2214 F_FILL
= FD_FILL_BYTE
;
2216 raw_cmd
->kernel_data
= floppy_track_buffer
;
2217 raw_cmd
->length
= 4 * F_SECT_PER_TRACK
;
2219 /* allow for about 30ms for data transport per track */
2220 head_shift
= (F_SECT_PER_TRACK
+ 5) / 6;
2222 /* a ``cylinder'' is two tracks plus a little stepping time */
2223 track_shift
= 2 * head_shift
+ 3;
2225 /* position of logical sector 1 on this track */
2226 n
= (track_shift
* format_req
.track
+ head_shift
* format_req
.head
)
2229 /* determine interleave */
2231 if (_floppy
->fmt_gap
< 0x22)
2234 /* initialize field */
2235 for (count
= 0; count
< F_SECT_PER_TRACK
; ++count
) {
2236 here
[count
].track
= format_req
.track
;
2237 here
[count
].head
= format_req
.head
;
2238 here
[count
].sect
= 0;
2239 here
[count
].size
= F_SIZECODE
;
2241 /* place logical sectors */
2242 for (count
= 1; count
<= F_SECT_PER_TRACK
; ++count
) {
2243 here
[n
].sect
= count
;
2244 n
= (n
+ il
) % F_SECT_PER_TRACK
;
2245 if (here
[n
].sect
) { /* sector busy, find next free sector */
2247 if (n
>= F_SECT_PER_TRACK
) {
2248 n
-= F_SECT_PER_TRACK
;
2249 while (here
[n
].sect
)
2254 if (_floppy
->stretch
& FD_SECTBASEMASK
) {
2255 for (count
= 0; count
< F_SECT_PER_TRACK
; count
++)
2256 here
[count
].sect
+= FD_SECTBASE(_floppy
) - 1;
2260 static void redo_format(void)
2263 setup_format_params(format_req
.track
<< STRETCH(_floppy
));
2265 debugt("queue format request");
2268 static struct cont_t format_cont
= {
2269 .interrupt
= format_interrupt
,
2270 .redo
= redo_format
,
2271 .error
= bad_flp_intr
,
2272 .done
= generic_done
2275 static int do_format(int drive
, struct format_descr
*tmp_format_req
)
2282 _floppy
->track
> DP
->tracks
||
2283 tmp_format_req
->track
>= _floppy
->track
||
2284 tmp_format_req
->head
>= _floppy
->head
||
2285 (_floppy
->sect
<< 2) % (1 << FD_SIZECODE(_floppy
)) ||
2286 !_floppy
->fmt_gap
) {
2287 process_fd_request();
2290 format_req
= *tmp_format_req
;
2292 cont
= &format_cont
;
2293 errors
= &format_errors
;
2295 process_fd_request();
2300 * Buffer read/write and support
2301 * =============================
2304 static void floppy_end_request(struct request
*req
, int error
)
2306 unsigned int nr_sectors
= current_count_sectors
;
2307 unsigned int drive
= (unsigned long)req
->rq_disk
->private_data
;
2309 /* current_count_sectors can be zero if transfer failed */
2311 nr_sectors
= blk_rq_cur_sectors(req
);
2312 if (__blk_end_request(req
, error
, nr_sectors
<< 9))
2315 /* We're done with the request */
2320 /* new request_done. Can handle physical sectors which are smaller than a
2322 static void request_done(int uptodate
)
2324 struct request_queue
*q
= floppy_queue
;
2325 struct request
*req
= current_req
;
2326 unsigned long flags
;
2330 reschedule_timeout(MAXTIMEOUT
, "request done", uptodate
);
2333 pr_info("floppy.c: no request in request_done\n");
2338 /* maintain values for invalidation on geometry
2340 block
= current_count_sectors
+ blk_rq_pos(req
);
2341 INFBOUND(DRS
->maxblock
, block
);
2342 if (block
> _floppy
->sect
)
2345 /* unlock chained buffers */
2346 spin_lock_irqsave(q
->queue_lock
, flags
);
2347 floppy_end_request(req
, 0);
2348 spin_unlock_irqrestore(q
->queue_lock
, flags
);
2350 if (rq_data_dir(req
) == WRITE
) {
2351 /* record write error information */
2352 DRWE
->write_errors
++;
2353 if (DRWE
->write_errors
== 1) {
2354 DRWE
->first_error_sector
= blk_rq_pos(req
);
2355 DRWE
->first_error_generation
= DRS
->generation
;
2357 DRWE
->last_error_sector
= blk_rq_pos(req
);
2358 DRWE
->last_error_generation
= DRS
->generation
;
2360 spin_lock_irqsave(q
->queue_lock
, flags
);
2361 floppy_end_request(req
, -EIO
);
2362 spin_unlock_irqrestore(q
->queue_lock
, flags
);
2366 /* Interrupt handler evaluating the result of the r/w operation */
2367 static void rw_interrupt(void)
2375 /* some Toshiba floppy controllers occasionnally seem to
2376 * return bogus interrupts after read/write operations, which
2377 * can be recognized by a bad head number (>= 2) */
2381 if (!DRS
->first_read_date
)
2382 DRS
->first_read_date
= jiffies
;
2397 nr_sectors
= (((R_TRACK
- TRACK
) * heads
+
2398 R_HEAD
- HEAD
) * SECT_PER_TRACK
+
2399 R_SECTOR
- SECTOR
+ eoc
) << SIZECODE
>> 2;
2401 #ifdef FLOPPY_SANITY_CHECK
2402 if (nr_sectors
/ ssize
>
2403 DIV_ROUND_UP(in_sector_offset
+ current_count_sectors
, ssize
)) {
2404 DPRINT("long rw: %x instead of %lx\n",
2405 nr_sectors
, current_count_sectors
);
2406 pr_info("rs=%d s=%d\n", R_SECTOR
, SECTOR
);
2407 pr_info("rh=%d h=%d\n", R_HEAD
, HEAD
);
2408 pr_info("rt=%d t=%d\n", R_TRACK
, TRACK
);
2409 pr_info("heads=%d eoc=%d\n", heads
, eoc
);
2410 pr_info("spt=%d st=%d ss=%d\n",
2411 SECT_PER_TRACK
, fsector_t
, ssize
);
2412 pr_info("in_sector_offset=%d\n", in_sector_offset
);
2416 nr_sectors
-= in_sector_offset
;
2417 INFBOUND(nr_sectors
, 0);
2418 SUPBOUND(current_count_sectors
, nr_sectors
);
2420 switch (interpret_errors()) {
2425 if (!current_count_sectors
) {
2432 if (!current_count_sectors
) {
2436 current_type
[current_drive
] = _floppy
;
2437 floppy_sizes
[TOMINOR(current_drive
)] = _floppy
->size
;
2442 if (DP
->flags
& FTD_MSG
)
2443 DPRINT("Auto-detected floppy type %s in fd%d\n",
2444 _floppy
->name
, current_drive
);
2445 current_type
[current_drive
] = _floppy
;
2446 floppy_sizes
[TOMINOR(current_drive
)] = _floppy
->size
;
2450 if (CT(COMMAND
) != FD_READ
||
2451 raw_cmd
->kernel_data
== current_req
->buffer
) {
2452 /* transfer directly from buffer */
2454 } else if (CT(COMMAND
) == FD_READ
) {
2455 buffer_track
= raw_cmd
->track
;
2456 buffer_drive
= current_drive
;
2457 INFBOUND(buffer_max
, nr_sectors
+ fsector_t
);
2462 /* Compute maximal contiguous buffer size. */
2463 static int buffer_chain_size(void)
2467 struct req_iterator iter
;
2470 base
= bio_data(current_req
->bio
);
2473 rq_for_each_segment(bv
, current_req
, iter
) {
2474 if (page_address(bv
->bv_page
) + bv
->bv_offset
!= base
+ size
)
2483 /* Compute the maximal transfer size */
2484 static int transfer_size(int ssize
, int max_sector
, int max_size
)
2486 SUPBOUND(max_sector
, fsector_t
+ max_size
);
2489 max_sector
-= (max_sector
% _floppy
->sect
) % ssize
;
2491 /* transfer size, beginning not aligned */
2492 current_count_sectors
= max_sector
- fsector_t
;
2498 * Move data from/to the track buffer to/from the buffer cache.
2500 static void copy_buffer(int ssize
, int max_sector
, int max_sector_2
)
2502 int remaining
; /* number of transferred 512-byte sectors */
2507 struct req_iterator iter
;
2509 max_sector
= transfer_size(ssize
,
2510 min(max_sector
, max_sector_2
),
2511 blk_rq_sectors(current_req
));
2513 if (current_count_sectors
<= 0 && CT(COMMAND
) == FD_WRITE
&&
2514 buffer_max
> fsector_t
+ blk_rq_sectors(current_req
))
2515 current_count_sectors
= min_t(int, buffer_max
- fsector_t
,
2516 blk_rq_sectors(current_req
));
2518 remaining
= current_count_sectors
<< 9;
2519 #ifdef FLOPPY_SANITY_CHECK
2520 if (remaining
> blk_rq_bytes(current_req
) && CT(COMMAND
) == FD_WRITE
) {
2521 DPRINT("in copy buffer\n");
2522 pr_info("current_count_sectors=%ld\n", current_count_sectors
);
2523 pr_info("remaining=%d\n", remaining
>> 9);
2524 pr_info("current_req->nr_sectors=%u\n",
2525 blk_rq_sectors(current_req
));
2526 pr_info("current_req->current_nr_sectors=%u\n",
2527 blk_rq_cur_sectors(current_req
));
2528 pr_info("max_sector=%d\n", max_sector
);
2529 pr_info("ssize=%d\n", ssize
);
2533 buffer_max
= max(max_sector
, buffer_max
);
2535 dma_buffer
= floppy_track_buffer
+ ((fsector_t
- buffer_min
) << 9);
2537 size
= blk_rq_cur_bytes(current_req
);
2539 rq_for_each_segment(bv
, current_req
, iter
) {
2544 SUPBOUND(size
, remaining
);
2546 buffer
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2547 #ifdef FLOPPY_SANITY_CHECK
2548 if (dma_buffer
+ size
>
2549 floppy_track_buffer
+ (max_buffer_sectors
<< 10) ||
2550 dma_buffer
< floppy_track_buffer
) {
2551 DPRINT("buffer overrun in copy buffer %d\n",
2552 (int)((floppy_track_buffer
- dma_buffer
) >> 9));
2553 pr_info("fsector_t=%d buffer_min=%d\n",
2554 fsector_t
, buffer_min
);
2555 pr_info("current_count_sectors=%ld\n",
2556 current_count_sectors
);
2557 if (CT(COMMAND
) == FD_READ
)
2559 if (CT(COMMAND
) == FD_WRITE
)
2563 if (((unsigned long)buffer
) % 512)
2564 DPRINT("%p buffer not aligned\n", buffer
);
2566 if (CT(COMMAND
) == FD_READ
)
2567 memcpy(buffer
, dma_buffer
, size
);
2569 memcpy(dma_buffer
, buffer
, size
);
2574 #ifdef FLOPPY_SANITY_CHECK
2577 max_sector
-= remaining
>> 9;
2578 DPRINT("weirdness: remaining %d\n", remaining
>> 9);
2583 /* work around a bug in pseudo DMA
2584 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2585 * sending data. Hence we need a different way to signal the
2586 * transfer length: We use SECT_PER_TRACK. Unfortunately, this
2587 * does not work with MT, hence we can only transfer one head at
2590 static void virtualdmabug_workaround(void)
2595 if (CT(COMMAND
) == FD_WRITE
) {
2596 COMMAND
&= ~0x80; /* switch off multiple track mode */
2598 hard_sectors
= raw_cmd
->length
>> (7 + SIZECODE
);
2599 end_sector
= SECTOR
+ hard_sectors
- 1;
2600 #ifdef FLOPPY_SANITY_CHECK
2601 if (end_sector
> SECT_PER_TRACK
) {
2602 pr_info("too many sectors %d > %d\n",
2603 end_sector
, SECT_PER_TRACK
);
2607 SECT_PER_TRACK
= end_sector
;
2608 /* make sure SECT_PER_TRACK
2609 * points to end of transfer */
2614 * Formulate a read/write request.
2615 * this routine decides where to load the data (directly to buffer, or to
2616 * tmp floppy area), how much data to load (the size of the buffer, the whole
2617 * track, or a single sector)
2618 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2619 * allocation on the fly, it should be done here. No other part should need
2623 static int make_raw_rw_request(void)
2625 int aligned_sector_t
;
2631 if (max_buffer_sectors
== 0) {
2632 pr_info("VFS: Block I/O scheduled on unopened device\n");
2636 set_fdc((long)current_req
->rq_disk
->private_data
);
2638 raw_cmd
= &default_raw_cmd
;
2639 raw_cmd
->flags
= FD_RAW_SPIN
| FD_RAW_NEED_DISK
| FD_RAW_NEED_DISK
|
2641 raw_cmd
->cmd_count
= NR_RW
;
2642 if (rq_data_dir(current_req
) == READ
) {
2643 raw_cmd
->flags
|= FD_RAW_READ
;
2644 COMMAND
= FM_MODE(_floppy
, FD_READ
);
2645 } else if (rq_data_dir(current_req
) == WRITE
) {
2646 raw_cmd
->flags
|= FD_RAW_WRITE
;
2647 COMMAND
= FM_MODE(_floppy
, FD_WRITE
);
2649 DPRINT("make_raw_rw_request: unknown command\n");
2653 max_sector
= _floppy
->sect
* _floppy
->head
;
2655 TRACK
= (int)blk_rq_pos(current_req
) / max_sector
;
2656 fsector_t
= (int)blk_rq_pos(current_req
) % max_sector
;
2657 if (_floppy
->track
&& TRACK
>= _floppy
->track
) {
2658 if (blk_rq_cur_sectors(current_req
) & 1) {
2659 current_count_sectors
= 1;
2664 HEAD
= fsector_t
/ _floppy
->sect
;
2666 if (((_floppy
->stretch
& (FD_SWAPSIDES
| FD_SECTBASEMASK
)) ||
2667 TESTF(FD_NEED_TWADDLE
)) && fsector_t
< _floppy
->sect
)
2668 max_sector
= _floppy
->sect
;
2670 /* 2M disks have phantom sectors on the first track */
2671 if ((_floppy
->rate
& FD_2M
) && (!TRACK
) && (!HEAD
)) {
2672 max_sector
= 2 * _floppy
->sect
/ 3;
2673 if (fsector_t
>= max_sector
) {
2674 current_count_sectors
=
2675 min_t(int, _floppy
->sect
- fsector_t
,
2676 blk_rq_sectors(current_req
));
2681 SIZECODE
= FD_SIZECODE(_floppy
);
2682 raw_cmd
->rate
= _floppy
->rate
& 0x43;
2683 if ((_floppy
->rate
& FD_2M
) && (TRACK
|| HEAD
) && raw_cmd
->rate
== 2)
2690 raw_cmd
->track
= TRACK
<< STRETCH(_floppy
);
2691 DR_SELECT
= UNIT(current_drive
) + PH_HEAD(_floppy
, HEAD
);
2694 SECT_PER_TRACK
= _floppy
->sect
<< 2 >> SIZECODE
;
2695 SECTOR
= ((fsector_t
% _floppy
->sect
) << 2 >> SIZECODE
) +
2696 FD_SECTBASE(_floppy
);
2698 /* tracksize describes the size which can be filled up with sectors
2701 tracksize
= _floppy
->sect
- _floppy
->sect
% ssize
;
2702 if (tracksize
< _floppy
->sect
) {
2704 if (tracksize
<= fsector_t
% _floppy
->sect
)
2707 /* if we are beyond tracksize, fill up using smaller sectors */
2708 while (tracksize
<= fsector_t
% _floppy
->sect
) {
2709 while (tracksize
+ ssize
> _floppy
->sect
) {
2717 max_sector
= HEAD
* _floppy
->sect
+ tracksize
;
2718 } else if (!TRACK
&& !HEAD
&& !(_floppy
->rate
& FD_2M
) && probing
) {
2719 max_sector
= _floppy
->sect
;
2720 } else if (!HEAD
&& CT(COMMAND
) == FD_WRITE
) {
2721 /* for virtual DMA bug workaround */
2722 max_sector
= _floppy
->sect
;
2725 in_sector_offset
= (fsector_t
% _floppy
->sect
) % ssize
;
2726 aligned_sector_t
= fsector_t
- in_sector_offset
;
2727 max_size
= blk_rq_sectors(current_req
);
2728 if ((raw_cmd
->track
== buffer_track
) &&
2729 (current_drive
== buffer_drive
) &&
2730 (fsector_t
>= buffer_min
) && (fsector_t
< buffer_max
)) {
2731 /* data already in track buffer */
2732 if (CT(COMMAND
) == FD_READ
) {
2733 copy_buffer(1, max_sector
, buffer_max
);
2736 } else if (in_sector_offset
|| blk_rq_sectors(current_req
) < ssize
) {
2737 if (CT(COMMAND
) == FD_WRITE
) {
2738 unsigned int sectors
;
2740 sectors
= fsector_t
+ blk_rq_sectors(current_req
);
2741 if (sectors
> ssize
&& sectors
< ssize
+ ssize
)
2742 max_size
= ssize
+ ssize
;
2746 raw_cmd
->flags
&= ~FD_RAW_WRITE
;
2747 raw_cmd
->flags
|= FD_RAW_READ
;
2748 COMMAND
= FM_MODE(_floppy
, FD_READ
);
2749 } else if ((unsigned long)current_req
->buffer
< MAX_DMA_ADDRESS
) {
2750 unsigned long dma_limit
;
2751 int direct
, indirect
;
2754 transfer_size(ssize
, max_sector
,
2755 max_buffer_sectors
* 2) - fsector_t
;
2758 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2759 * on a 64 bit machine!
2761 max_size
= buffer_chain_size();
2762 dma_limit
= (MAX_DMA_ADDRESS
-
2763 ((unsigned long)current_req
->buffer
)) >> 9;
2764 if ((unsigned long)max_size
> dma_limit
)
2765 max_size
= dma_limit
;
2766 /* 64 kb boundaries */
2767 if (CROSS_64KB(current_req
->buffer
, max_size
<< 9))
2769 ((unsigned long)current_req
->buffer
) %
2771 direct
= transfer_size(ssize
, max_sector
, max_size
) - fsector_t
;
2773 * We try to read tracks, but if we get too many errors, we
2774 * go back to reading just one sector at a time.
2776 * This means we should be able to read a sector even if there
2777 * are other bad sectors on this track.
2780 (indirect
* 2 > direct
* 3 &&
2781 *errors
< DP
->max_errors
.read_track
&&
2783 (DP
->read_track
& (1 << DRS
->probed_format
)))))) {
2784 max_size
= blk_rq_sectors(current_req
);
2786 raw_cmd
->kernel_data
= current_req
->buffer
;
2787 raw_cmd
->length
= current_count_sectors
<< 9;
2788 if (raw_cmd
->length
== 0) {
2789 DPRINT("zero dma transfer attempted from make_raw_request\n");
2790 DPRINT("indirect=%d direct=%d fsector_t=%d\n",
2791 indirect
, direct
, fsector_t
);
2794 virtualdmabug_workaround();
2799 if (CT(COMMAND
) == FD_READ
)
2800 max_size
= max_sector
; /* unbounded */
2802 /* claim buffer track if needed */
2803 if (buffer_track
!= raw_cmd
->track
|| /* bad track */
2804 buffer_drive
!= current_drive
|| /* bad drive */
2805 fsector_t
> buffer_max
||
2806 fsector_t
< buffer_min
||
2807 ((CT(COMMAND
) == FD_READ
||
2808 (!in_sector_offset
&& blk_rq_sectors(current_req
) >= ssize
)) &&
2809 max_sector
> 2 * max_buffer_sectors
+ buffer_min
&&
2810 max_size
+ fsector_t
> 2 * max_buffer_sectors
+ buffer_min
)) {
2811 /* not enough space */
2813 buffer_drive
= current_drive
;
2814 buffer_max
= buffer_min
= aligned_sector_t
;
2816 raw_cmd
->kernel_data
= floppy_track_buffer
+
2817 ((aligned_sector_t
- buffer_min
) << 9);
2819 if (CT(COMMAND
) == FD_WRITE
) {
2820 /* copy write buffer to track buffer.
2821 * if we get here, we know that the write
2822 * is either aligned or the data already in the buffer
2823 * (buffer will be overwritten) */
2824 #ifdef FLOPPY_SANITY_CHECK
2825 if (in_sector_offset
&& buffer_track
== -1)
2826 DPRINT("internal error offset !=0 on write\n");
2828 buffer_track
= raw_cmd
->track
;
2829 buffer_drive
= current_drive
;
2830 copy_buffer(ssize
, max_sector
,
2831 2 * max_buffer_sectors
+ buffer_min
);
2833 transfer_size(ssize
, max_sector
,
2834 2 * max_buffer_sectors
+ buffer_min
-
2837 /* round up current_count_sectors to get dma xfer size */
2838 raw_cmd
->length
= in_sector_offset
+ current_count_sectors
;
2839 raw_cmd
->length
= ((raw_cmd
->length
- 1) | (ssize
- 1)) + 1;
2840 raw_cmd
->length
<<= 9;
2841 #ifdef FLOPPY_SANITY_CHECK
2842 if ((raw_cmd
->length
< current_count_sectors
<< 9) ||
2843 (raw_cmd
->kernel_data
!= current_req
->buffer
&&
2844 CT(COMMAND
) == FD_WRITE
&&
2845 (aligned_sector_t
+ (raw_cmd
->length
>> 9) > buffer_max
||
2846 aligned_sector_t
< buffer_min
)) ||
2847 raw_cmd
->length
% (128 << SIZECODE
) ||
2848 raw_cmd
->length
<= 0 || current_count_sectors
<= 0) {
2849 DPRINT("fractionary current count b=%lx s=%lx\n",
2850 raw_cmd
->length
, current_count_sectors
);
2851 if (raw_cmd
->kernel_data
!= current_req
->buffer
)
2852 pr_info("addr=%d, length=%ld\n",
2853 (int)((raw_cmd
->kernel_data
-
2854 floppy_track_buffer
) >> 9),
2855 current_count_sectors
);
2856 pr_info("st=%d ast=%d mse=%d msi=%d\n",
2857 fsector_t
, aligned_sector_t
, max_sector
, max_size
);
2858 pr_info("ssize=%x SIZECODE=%d\n", ssize
, SIZECODE
);
2859 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2860 COMMAND
, SECTOR
, HEAD
, TRACK
);
2861 pr_info("buffer drive=%d\n", buffer_drive
);
2862 pr_info("buffer track=%d\n", buffer_track
);
2863 pr_info("buffer_min=%d\n", buffer_min
);
2864 pr_info("buffer_max=%d\n", buffer_max
);
2868 if (raw_cmd
->kernel_data
!= current_req
->buffer
) {
2869 if (raw_cmd
->kernel_data
< floppy_track_buffer
||
2870 current_count_sectors
< 0 ||
2871 raw_cmd
->length
< 0 ||
2872 raw_cmd
->kernel_data
+ raw_cmd
->length
>
2873 floppy_track_buffer
+ (max_buffer_sectors
<< 10)) {
2874 DPRINT("buffer overrun in schedule dma\n");
2875 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n",
2876 fsector_t
, buffer_min
, raw_cmd
->length
>> 9);
2877 pr_info("current_count_sectors=%ld\n",
2878 current_count_sectors
);
2879 if (CT(COMMAND
) == FD_READ
)
2881 if (CT(COMMAND
) == FD_WRITE
)
2885 } else if (raw_cmd
->length
> blk_rq_bytes(current_req
) ||
2886 current_count_sectors
> blk_rq_sectors(current_req
)) {
2887 DPRINT("buffer overrun in direct transfer\n");
2889 } else if (raw_cmd
->length
< current_count_sectors
<< 9) {
2890 DPRINT("more sectors than bytes\n");
2891 pr_info("bytes=%ld\n", raw_cmd
->length
>> 9);
2892 pr_info("sectors=%ld\n", current_count_sectors
);
2894 if (raw_cmd
->length
== 0) {
2895 DPRINT("zero dma transfer attempted from make_raw_request\n");
2900 virtualdmabug_workaround();
2904 static void redo_fd_request(void)
2906 #define REPEAT {request_done(0); continue; }
2911 if (current_drive
< N_DRIVE
)
2912 floppy_off(current_drive
);
2916 struct request
*req
;
2918 spin_lock_irq(floppy_queue
->queue_lock
);
2919 req
= blk_fetch_request(floppy_queue
);
2920 spin_unlock_irq(floppy_queue
->queue_lock
);
2928 drive
= (long)current_req
->rq_disk
->private_data
;
2930 reschedule_timeout(current_reqD
, "redo fd request", 0);
2933 raw_cmd
= &default_raw_cmd
;
2935 if (start_motor(redo_fd_request
))
2937 disk_change(current_drive
);
2938 if (test_bit(current_drive
, &fake_change
) ||
2939 TESTF(FD_DISK_CHANGED
)) {
2940 DPRINT("disk absent or changed during operation\n");
2943 if (!_floppy
) { /* Autodetection */
2945 DRS
->probed_format
= 0;
2946 if (next_valid_format()) {
2947 DPRINT("no autodetectable formats\n");
2954 floppy_type
+ DP
->autodetect
[DRS
->probed_format
];
2957 errors
= &(current_req
->errors
);
2958 tmp
= make_raw_rw_request();
2964 if (TESTF(FD_NEED_TWADDLE
))
2966 schedule_bh(floppy_start
);
2967 debugt("queue fd request");
2973 static struct cont_t rw_cont
= {
2974 .interrupt
= rw_interrupt
,
2975 .redo
= redo_fd_request
,
2976 .error
= bad_flp_intr
,
2977 .done
= request_done
2980 static void process_fd_request(void)
2983 schedule_bh(redo_fd_request
);
2986 static void do_fd_request(struct request_queue
*q
)
2988 if (max_buffer_sectors
== 0) {
2989 pr_info("VFS: do_fd_request called on non-open device\n");
2993 if (usage_count
== 0) {
2994 pr_info("warning: usage count=0, current_req=%p exiting\n",
2996 pr_info("sect=%ld type=%x flags=%x\n",
2997 (long)blk_rq_pos(current_req
), current_req
->cmd_type
,
2998 current_req
->cmd_flags
);
3001 if (test_bit(0, &fdc_busy
)) {
3002 /* fdc busy, this new request will be treated when the
3003 current one is done */
3004 is_alive("do fd request, old request running");
3007 lock_fdc(MAXTIMEOUT
, 0);
3008 process_fd_request();
3009 is_alive("do fd request");
3012 static struct cont_t poll_cont
= {
3013 .interrupt
= success_and_wakeup
,
3014 .redo
= floppy_ready
,
3015 .error
= generic_failure
,
3016 .done
= generic_done
3019 static int poll_drive(int interruptible
, int flag
)
3023 /* no auto-sense, just clear dcl */
3024 raw_cmd
= &default_raw_cmd
;
3025 raw_cmd
->flags
= flag
;
3027 raw_cmd
->cmd_count
= 0;
3030 if (DP
->flags
& FD_DEBUG
)
3031 DPRINT("setting NEWCHANGE in poll_drive\n");
3033 SETF(FD_DISK_NEWCHANGE
);
3039 * User triggered reset
3040 * ====================
3043 static void reset_intr(void)
3045 pr_info("weird, reset interrupt called\n");
3048 static struct cont_t reset_cont
= {
3049 .interrupt
= reset_intr
,
3050 .redo
= success_and_wakeup
,
3051 .error
= generic_failure
,
3052 .done
= generic_done
3055 static int user_reset_fdc(int drive
, int arg
, int interruptible
)
3060 LOCK_FDC(drive
, interruptible
);
3061 if (arg
== FD_RESET_ALWAYS
)
3067 process_fd_request();
3072 * Misc Ioctl's and support
3073 * ========================
3075 static inline int fd_copyout(void __user
*param
, const void *address
,
3078 return copy_to_user(param
, address
, size
) ? -EFAULT
: 0;
3081 static inline int fd_copyin(void __user
*param
, void *address
,
3084 return copy_from_user(address
, param
, size
) ? -EFAULT
: 0;
3087 #define _COPYOUT(x) (copy_to_user((void __user *)param, &(x), sizeof(x)) \
3089 #define _COPYIN(x) (copy_from_user(&(x), (void __user *)param, sizeof(x)) \
3092 #define COPYOUT(x) ECALL(_COPYOUT(x))
3093 #define COPYIN(x) ECALL(_COPYIN(x))
3095 static inline const char *drive_name(int type
, int drive
)
3097 struct floppy_struct
*floppy
;
3100 floppy
= floppy_type
+ type
;
3102 if (UDP
->native_format
)
3103 floppy
= floppy_type
+ UDP
->native_format
;
3108 return floppy
->name
;
3114 static void raw_cmd_done(int flag
)
3119 raw_cmd
->flags
|= FD_RAW_FAILURE
;
3120 raw_cmd
->flags
|= FD_RAW_HARDFAILURE
;
3122 raw_cmd
->reply_count
= inr
;
3123 if (raw_cmd
->reply_count
> MAX_REPLIES
)
3124 raw_cmd
->reply_count
= 0;
3125 for (i
= 0; i
< raw_cmd
->reply_count
; i
++)
3126 raw_cmd
->reply
[i
] = reply_buffer
[i
];
3128 if (raw_cmd
->flags
& (FD_RAW_READ
| FD_RAW_WRITE
)) {
3129 unsigned long flags
;
3130 flags
= claim_dma_lock();
3131 raw_cmd
->length
= fd_get_dma_residue();
3132 release_dma_lock(flags
);
3135 if ((raw_cmd
->flags
& FD_RAW_SOFTFAILURE
) &&
3136 (!raw_cmd
->reply_count
|| (raw_cmd
->reply
[0] & 0xc0)))
3137 raw_cmd
->flags
|= FD_RAW_FAILURE
;
3139 if (disk_change(current_drive
))
3140 raw_cmd
->flags
|= FD_RAW_DISK_CHANGE
;
3142 raw_cmd
->flags
&= ~FD_RAW_DISK_CHANGE
;
3143 if (raw_cmd
->flags
& FD_RAW_NO_MOTOR_AFTER
)
3144 motor_off_callback(current_drive
);
3146 if (raw_cmd
->next
&&
3147 (!(raw_cmd
->flags
& FD_RAW_FAILURE
) ||
3148 !(raw_cmd
->flags
& FD_RAW_STOP_IF_FAILURE
)) &&
3149 ((raw_cmd
->flags
& FD_RAW_FAILURE
) ||
3150 !(raw_cmd
->flags
& FD_RAW_STOP_IF_SUCCESS
))) {
3151 raw_cmd
= raw_cmd
->next
;
3158 static struct cont_t raw_cmd_cont
= {
3159 .interrupt
= success_and_wakeup
,
3160 .redo
= floppy_start
,
3161 .error
= generic_failure
,
3162 .done
= raw_cmd_done
3165 static inline int raw_cmd_copyout(int cmd
, char __user
*param
,
3166 struct floppy_raw_cmd
*ptr
)
3172 param
+= sizeof(struct floppy_raw_cmd
);
3173 if ((ptr
->flags
& FD_RAW_READ
) && ptr
->buffer_length
) {
3174 if (ptr
->length
>= 0 &&
3175 ptr
->length
<= ptr
->buffer_length
) {
3176 long length
= ptr
->buffer_length
- ptr
->length
;
3177 ECALL(fd_copyout(ptr
->data
, ptr
->kernel_data
,
3186 static void raw_cmd_free(struct floppy_raw_cmd
**ptr
)
3188 struct floppy_raw_cmd
*next
;
3189 struct floppy_raw_cmd
*this;
3194 if (this->buffer_length
) {
3195 fd_dma_mem_free((unsigned long)this->kernel_data
,
3196 this->buffer_length
);
3197 this->buffer_length
= 0;
3205 static inline int raw_cmd_copyin(int cmd
, char __user
*param
,
3206 struct floppy_raw_cmd
**rcmd
)
3208 struct floppy_raw_cmd
*ptr
;
3214 ptr
= (struct floppy_raw_cmd
*)
3215 kmalloc(sizeof(struct floppy_raw_cmd
), GFP_USER
);
3221 ptr
->buffer_length
= 0;
3222 param
+= sizeof(struct floppy_raw_cmd
);
3223 if (ptr
->cmd_count
> 33)
3224 /* the command may now also take up the space
3225 * initially intended for the reply & the
3226 * reply count. Needed for long 82078 commands
3227 * such as RESTORE, which takes ... 17 command
3228 * bytes. Murphy's law #137: When you reserve
3229 * 16 bytes for a structure, you'll one day
3230 * discover that you really need 17...
3234 for (i
= 0; i
< 16; i
++)
3236 ptr
->resultcode
= 0;
3237 ptr
->kernel_data
= NULL
;
3239 if (ptr
->flags
& (FD_RAW_READ
| FD_RAW_WRITE
)) {
3240 if (ptr
->length
<= 0)
3243 (char *)fd_dma_mem_alloc(ptr
->length
);
3244 fallback_on_nodma_alloc(&ptr
->kernel_data
, ptr
->length
);
3245 if (!ptr
->kernel_data
)
3247 ptr
->buffer_length
= ptr
->length
;
3249 if (ptr
->flags
& FD_RAW_WRITE
)
3250 ECALL(fd_copyin(ptr
->data
, ptr
->kernel_data
,
3252 rcmd
= &(ptr
->next
);
3253 if (!(ptr
->flags
& FD_RAW_MORE
))
3259 static int raw_cmd_ioctl(int cmd
, void __user
*param
)
3261 struct floppy_raw_cmd
*my_raw_cmd
;
3266 if (FDCS
->rawcmd
<= 1)
3268 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
3269 if (FDC(drive
) != fdc
)
3271 if (drive
== current_drive
) {
3272 if (UDRS
->fd_ref
> 1) {
3276 } else if (UDRS
->fd_ref
) {
3285 ret
= raw_cmd_copyin(cmd
, param
, &my_raw_cmd
);
3287 raw_cmd_free(&my_raw_cmd
);
3291 raw_cmd
= my_raw_cmd
;
3292 cont
= &raw_cmd_cont
;
3293 ret
= wait_til_done(floppy_start
, 1);
3295 if (DP
->flags
& FD_DEBUG
)
3296 DPRINT("calling disk change from raw_cmd ioctl\n");
3299 if (ret
!= -EINTR
&& FDCS
->reset
)
3302 DRS
->track
= NO_TRACK
;
3304 ret2
= raw_cmd_copyout(cmd
, param
, my_raw_cmd
);
3307 raw_cmd_free(&my_raw_cmd
);
3311 static int invalidate_drive(struct block_device
*bdev
)
3313 /* invalidate the buffer track to force a reread */
3314 set_bit((long)bdev
->bd_disk
->private_data
, &fake_change
);
3315 process_fd_request();
3316 check_disk_change(bdev
);
3320 static inline int set_geometry(unsigned int cmd
, struct floppy_struct
*g
,
3321 int drive
, int type
, struct block_device
*bdev
)
3325 /* sanity checking for parameters. */
3328 g
->track
<= 0 || g
->track
> UDP
->tracks
>> STRETCH(g
) ||
3329 /* check if reserved bits are set */
3330 (g
->stretch
& ~(FD_STRETCH
| FD_SWAPSIDES
| FD_SECTBASEMASK
)) != 0)
3333 if (!capable(CAP_SYS_ADMIN
))
3335 mutex_lock(&open_lock
);
3336 if (lock_fdc(drive
, 1)) {
3337 mutex_unlock(&open_lock
);
3340 floppy_type
[type
] = *g
;
3341 floppy_type
[type
].name
= "user format";
3342 for (cnt
= type
<< 2; cnt
< (type
<< 2) + 4; cnt
++)
3343 floppy_sizes
[cnt
] = floppy_sizes
[cnt
+ 0x80] =
3344 floppy_type
[type
].size
+ 1;
3345 process_fd_request();
3346 for (cnt
= 0; cnt
< N_DRIVE
; cnt
++) {
3347 struct block_device
*bdev
= opened_bdev
[cnt
];
3348 if (!bdev
|| ITYPE(drive_state
[cnt
].fd_device
) != type
)
3350 __invalidate_device(bdev
);
3352 mutex_unlock(&open_lock
);
3356 if (cmd
!= FDDEFPRM
)
3357 /* notice a disk change immediately, else
3358 * we lose our settings immediately*/
3359 CALL(poll_drive(1, FD_RAW_NEED_DISK
));
3360 oldStretch
= g
->stretch
;
3361 user_params
[drive
] = *g
;
3362 if (buffer_drive
== drive
)
3363 SUPBOUND(buffer_max
, user_params
[drive
].sect
);
3364 current_type
[drive
] = &user_params
[drive
];
3365 floppy_sizes
[drive
] = user_params
[drive
].size
;
3366 if (cmd
== FDDEFPRM
)
3367 DRS
->keep_data
= -1;
3370 /* invalidation. Invalidate only when needed, i.e.
3371 * when there are already sectors in the buffer cache
3372 * whose number will change. This is useful, because
3373 * mtools often changes the geometry of the disk after
3374 * looking at the boot block */
3375 if (DRS
->maxblock
> user_params
[drive
].sect
||
3377 ((user_params
[drive
].sect
^ oldStretch
) &
3378 (FD_SWAPSIDES
| FD_SECTBASEMASK
)))
3379 invalidate_drive(bdev
);
3381 process_fd_request();
3386 /* handle obsolete ioctl's */
3387 static int ioctl_table
[] = {
3415 static inline int normalize_ioctl(int *cmd
, int *size
)
3419 for (i
= 0; i
< ARRAY_SIZE(ioctl_table
); i
++) {
3420 if ((*cmd
& 0xffff) == (ioctl_table
[i
] & 0xffff)) {
3421 *size
= _IOC_SIZE(*cmd
);
3422 *cmd
= ioctl_table
[i
];
3423 if (*size
> _IOC_SIZE(*cmd
)) {
3424 pr_info("ioctl not yet supported\n");
3433 static int get_floppy_geometry(int drive
, int type
, struct floppy_struct
**g
)
3436 *g
= &floppy_type
[type
];
3439 CALL(poll_drive(0, 0));
3440 process_fd_request();
3441 *g
= current_type
[drive
];
3448 static int fd_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
3450 int drive
= (long)bdev
->bd_disk
->private_data
;
3451 int type
= ITYPE(drive_state
[drive
].fd_device
);
3452 struct floppy_struct
*g
;
3455 ret
= get_floppy_geometry(drive
, type
, &g
);
3459 geo
->heads
= g
->head
;
3460 geo
->sectors
= g
->sect
;
3461 geo
->cylinders
= g
->track
;
3465 static int fd_ioctl(struct block_device
*bdev
, fmode_t mode
, unsigned int cmd
,
3466 unsigned long param
)
3468 #define FD_IOCTL_ALLOWED (mode & (FMODE_WRITE|FMODE_WRITE_IOCTL))
3470 int drive
= (long)bdev
->bd_disk
->private_data
;
3471 int type
= ITYPE(UDRS
->fd_device
);
3476 struct floppy_struct g
; /* geometry */
3477 struct format_descr f
;
3478 struct floppy_max_errors max_errors
;
3479 struct floppy_drive_params dp
;
3480 } inparam
; /* parameters coming from user space */
3481 const char *outparam
; /* parameters passed back to user space */
3483 /* convert compatibility eject ioctls into floppy eject ioctl.
3484 * We do this in order to provide a means to eject floppy disks before
3485 * installing the new fdutils package */
3486 if (cmd
== CDROMEJECT
|| /* CD-ROM eject */
3487 cmd
== 0x6470) { /* SunOS floppy eject */
3488 DPRINT("obsolete eject ioctl\n");
3489 DPRINT("please use floppycontrol --eject\n");
3493 if (!((cmd
& 0xff00) == 0x0200))
3496 /* convert the old style command into a new style command */
3497 ECALL(normalize_ioctl(&cmd
, &size
));
3499 /* permission checks */
3500 if (((cmd
& 0x40) && !FD_IOCTL_ALLOWED
) ||
3501 ((cmd
& 0x80) && !capable(CAP_SYS_ADMIN
)))
3504 if (WARN_ON(size
< 0 || size
> sizeof(inparam
)))
3508 memset(&inparam
, 0, sizeof(inparam
));
3509 if (_IOC_DIR(cmd
) & _IOC_WRITE
)
3510 ECALL(fd_copyin((void __user
*)param
, &inparam
, size
));
3514 if (UDRS
->fd_ref
!= 1)
3515 /* somebody else has this drive open */
3519 /* do the actual eject. Fails on
3520 * non-Sparc architectures */
3521 ret
= fd_eject(UNIT(drive
));
3523 USETF(FD_DISK_CHANGED
);
3525 process_fd_request();
3529 current_type
[drive
] = NULL
;
3530 floppy_sizes
[drive
] = MAX_DISK_SIZE
<< 1;
3531 UDRS
->keep_data
= 0;
3532 return invalidate_drive(bdev
);
3535 return set_geometry(cmd
, &inparam
.g
, drive
, type
, bdev
);
3537 ECALL(get_floppy_geometry(drive
, type
,
3538 (struct floppy_struct
**)
3542 UDP
->flags
|= FTD_MSG
;
3545 UDP
->flags
&= ~FTD_MSG
;
3549 CALL(poll_drive(1, FD_RAW_NEED_DISK
));
3551 process_fd_request();
3552 if (ret
& FD_VERIFY
)
3554 if (!(ret
& FD_DISK_WRITABLE
))
3558 if (UDRS
->fd_ref
!= 1)
3560 return do_format(drive
, &inparam
.f
);
3564 return invalidate_drive(bdev
);
3565 case FDSETEMSGTRESH
:
3566 UDP
->max_errors
.reporting
= (unsigned short)(param
& 0x0f);
3569 outparam
= (const char *)&UDP
->max_errors
;
3572 UDP
->max_errors
= inparam
.max_errors
;
3575 outparam
= drive_name(type
, drive
);
3576 SUPBOUND(size
, strlen(outparam
) + 1);
3582 outparam
= (const char *)UDP
;
3586 CALL(poll_drive(1, FD_RAW_NEED_DISK
));
3587 process_fd_request();
3590 outparam
= (const char *)UDRS
;
3593 return user_reset_fdc(drive
, (int)param
, 1);
3595 outparam
= (const char *)UFDCS
;
3598 memset(UDRWE
, 0, sizeof(*UDRWE
));
3601 outparam
= (const char *)UDRWE
;
3608 CALL(i
= raw_cmd_ioctl(cmd
, (void __user
*)param
));
3609 process_fd_request();
3614 process_fd_request();
3620 if (_IOC_DIR(cmd
) & _IOC_READ
)
3621 return fd_copyout((void __user
*)param
, outparam
, size
);
3626 static void __init
config_types(void)
3628 bool has_drive
= false;
3631 /* read drive info out of physical CMOS */
3634 UDP
->cmos
= FLOPPY0_TYPE
;
3636 if (!UDP
->cmos
&& FLOPPY1_TYPE
)
3637 UDP
->cmos
= FLOPPY1_TYPE
;
3639 /* FIXME: additional physical CMOS drive detection should go here */
3641 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
3642 unsigned int type
= UDP
->cmos
;
3643 struct floppy_drive_params
*params
;
3644 const char *name
= NULL
;
3645 static char temparea
[32];
3647 if (type
< ARRAY_SIZE(default_drive_params
)) {
3648 params
= &default_drive_params
[type
].params
;
3650 name
= default_drive_params
[type
].name
;
3651 allowed_drive_mask
|= 1 << drive
;
3653 allowed_drive_mask
&= ~(1 << drive
);
3655 params
= &default_drive_params
[0].params
;
3656 sprintf(temparea
, "unknown type %d (usb?)", type
);
3660 const char *prepend
;
3664 pr_info("Floppy drive(s):");
3669 pr_cont("%s fd%d is %s", prepend
, drive
, name
);
3678 static int floppy_release(struct gendisk
*disk
, fmode_t mode
)
3680 int drive
= (long)disk
->private_data
;
3682 mutex_lock(&open_lock
);
3683 if (UDRS
->fd_ref
< 0)
3685 else if (!UDRS
->fd_ref
--) {
3686 DPRINT("floppy_release with fd_ref == 0");
3690 opened_bdev
[drive
] = NULL
;
3691 mutex_unlock(&open_lock
);
3697 * floppy_open check for aliasing (/dev/fd0 can be the same as
3698 * /dev/PS0 etc), and disallows simultaneous access to the same
3699 * drive with different device numbers.
3701 static int floppy_open(struct block_device
*bdev
, fmode_t mode
)
3703 int drive
= (long)bdev
->bd_disk
->private_data
;
3704 int old_dev
, new_dev
;
3709 mutex_lock(&open_lock
);
3710 old_dev
= UDRS
->fd_device
;
3711 if (opened_bdev
[drive
] && opened_bdev
[drive
] != bdev
)
3714 if (!UDRS
->fd_ref
&& (UDP
->flags
& FD_BROKEN_DCL
)) {
3715 USETF(FD_DISK_CHANGED
);
3719 if (UDRS
->fd_ref
== -1 || (UDRS
->fd_ref
&& (mode
& FMODE_EXCL
)))
3722 if (mode
& FMODE_EXCL
)
3727 opened_bdev
[drive
] = bdev
;
3731 if (!floppy_track_buffer
) {
3732 /* if opening an ED drive, reserve a big buffer,
3733 * else reserve a small one */
3734 if ((UDP
->cmos
== 6) || (UDP
->cmos
== 5))
3735 try = 64; /* Only 48 actually useful */
3737 try = 32; /* Only 24 actually useful */
3739 tmp
= (char *)fd_dma_mem_alloc(1024 * try);
3740 if (!tmp
&& !floppy_track_buffer
) {
3741 try >>= 1; /* buffer only one side */
3743 tmp
= (char *)fd_dma_mem_alloc(1024 * try);
3745 if (!tmp
&& !floppy_track_buffer
)
3746 fallback_on_nodma_alloc(&tmp
, 2048 * try);
3747 if (!tmp
&& !floppy_track_buffer
) {
3748 DPRINT("Unable to allocate DMA memory\n");
3751 if (floppy_track_buffer
) {
3753 fd_dma_mem_free((unsigned long)tmp
, try * 1024);
3755 buffer_min
= buffer_max
= -1;
3756 floppy_track_buffer
= tmp
;
3757 max_buffer_sectors
= try;
3761 new_dev
= MINOR(bdev
->bd_dev
);
3762 UDRS
->fd_device
= new_dev
;
3763 set_capacity(disks
[drive
], floppy_sizes
[new_dev
]);
3764 if (old_dev
!= -1 && old_dev
!= new_dev
) {
3765 if (buffer_drive
== drive
)
3769 if (UFDCS
->rawcmd
== 1)
3772 if (!(mode
& FMODE_NDELAY
)) {
3773 if (mode
& (FMODE_READ
|FMODE_WRITE
)) {
3774 UDRS
->last_checked
= 0;
3775 check_disk_change(bdev
);
3776 if (UTESTF(FD_DISK_CHANGED
))
3780 if ((mode
& FMODE_WRITE
) && !(UTESTF(FD_DISK_WRITABLE
)))
3783 mutex_unlock(&open_lock
);
3786 if (UDRS
->fd_ref
< 0)
3791 opened_bdev
[drive
] = NULL
;
3793 mutex_unlock(&open_lock
);
3798 * Check if the disk has been changed or if a change has been faked.
3800 static int check_floppy_change(struct gendisk
*disk
)
3802 int drive
= (long)disk
->private_data
;
3804 if (UTESTF(FD_DISK_CHANGED
) || UTESTF(FD_VERIFY
))
3807 if (time_after(jiffies
, UDRS
->last_checked
+ UDP
->checkfreq
)) {
3810 process_fd_request();
3813 if (UTESTF(FD_DISK_CHANGED
) ||
3814 UTESTF(FD_VERIFY
) ||
3815 test_bit(drive
, &fake_change
) ||
3816 (!ITYPE(UDRS
->fd_device
) && !current_type
[drive
]))
3822 * This implements "read block 0" for floppy_revalidate().
3823 * Needed for format autodetection, checking whether there is
3824 * a disk in the drive, and whether that disk is writable.
3827 static void floppy_rb0_complete(struct bio
*bio
, int err
)
3829 complete((struct completion
*)bio
->bi_private
);
3832 static int __floppy_read_block_0(struct block_device
*bdev
)
3835 struct bio_vec bio_vec
;
3836 struct completion complete
;
3840 page
= alloc_page(GFP_NOIO
);
3842 process_fd_request();
3846 size
= bdev
->bd_block_size
;
3851 bio
.bi_io_vec
= &bio_vec
;
3852 bio_vec
.bv_page
= page
;
3853 bio_vec
.bv_len
= size
;
3854 bio_vec
.bv_offset
= 0;
3860 init_completion(&complete
);
3861 bio
.bi_private
= &complete
;
3862 bio
.bi_end_io
= floppy_rb0_complete
;
3864 submit_bio(READ
, &bio
);
3865 generic_unplug_device(bdev_get_queue(bdev
));
3866 process_fd_request();
3867 wait_for_completion(&complete
);
3874 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
3875 * the bootblock (block 0). "Autodetection" is also needed to check whether
3876 * there is a disk in the drive at all... Thus we also do it for fixed
3877 * geometry formats */
3878 static int floppy_revalidate(struct gendisk
*disk
)
3880 int drive
= (long)disk
->private_data
;
3881 #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device))
3885 if (UTESTF(FD_DISK_CHANGED
) ||
3886 UTESTF(FD_VERIFY
) || test_bit(drive
, &fake_change
) || NO_GEOM
) {
3887 if (usage_count
== 0) {
3888 pr_info("VFS: revalidate called on non-open device.\n");
3892 cf
= UTESTF(FD_DISK_CHANGED
) || UTESTF(FD_VERIFY
);
3893 if (!(cf
|| test_bit(drive
, &fake_change
) || NO_GEOM
)) {
3894 process_fd_request(); /*already done by another thread */
3899 if (buffer_drive
== drive
)
3901 clear_bit(drive
, &fake_change
);
3902 UCLEARF(FD_DISK_CHANGED
);
3907 res
= __floppy_read_block_0(opened_bdev
[drive
]);
3910 poll_drive(0, FD_RAW_NEED_DISK
);
3911 process_fd_request();
3914 set_capacity(disk
, floppy_sizes
[UDRS
->fd_device
]);
3918 static const struct block_device_operations floppy_fops
= {
3919 .owner
= THIS_MODULE
,
3920 .open
= floppy_open
,
3921 .release
= floppy_release
,
3922 .locked_ioctl
= fd_ioctl
,
3923 .getgeo
= fd_getgeo
,
3924 .media_changed
= check_floppy_change
,
3925 .revalidate_disk
= floppy_revalidate
,
3929 * Floppy Driver initialization
3930 * =============================
3933 /* Determine the floppy disk controller type */
3934 /* This routine was written by David C. Niemi */
3935 static char __init
get_fdc_version(void)
3939 output_byte(FD_DUMPREGS
); /* 82072 and better know DUMPREGS */
3944 return FDC_NONE
; /* No FDC present ??? */
3945 if ((r
== 1) && (reply_buffer
[0] == 0x80)) {
3946 pr_info("FDC %d is an 8272A\n", fdc
);
3947 return FDC_8272A
; /* 8272a/765 don't know DUMPREGS */
3950 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
3955 if (!fdc_configure()) {
3956 pr_info("FDC %d is an 82072\n", fdc
);
3957 return FDC_82072
; /* 82072 doesn't know CONFIGURE */
3960 output_byte(FD_PERPENDICULAR
);
3961 if (need_more_output() == MORE_OUTPUT
) {
3964 pr_info("FDC %d is an 82072A\n", fdc
);
3965 return FDC_82072A
; /* 82072A as found on Sparcs. */
3968 output_byte(FD_UNLOCK
);
3970 if ((r
== 1) && (reply_buffer
[0] == 0x80)) {
3971 pr_info("FDC %d is a pre-1991 82077\n", fdc
);
3972 return FDC_82077_ORIG
; /* Pre-1991 82077, doesn't know
3975 if ((r
!= 1) || (reply_buffer
[0] != 0x00)) {
3976 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
3980 output_byte(FD_PARTID
);
3983 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
3987 if (reply_buffer
[0] == 0x80) {
3988 pr_info("FDC %d is a post-1991 82077\n", fdc
);
3989 return FDC_82077
; /* Revised 82077AA passes all the tests */
3991 switch (reply_buffer
[0] >> 5) {
3993 /* Either a 82078-1 or a 82078SL running at 5Volt */
3994 pr_info("FDC %d is an 82078.\n", fdc
);
3997 pr_info("FDC %d is a 44pin 82078\n", fdc
);
4000 pr_info("FDC %d is a S82078B\n", fdc
);
4003 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc
);
4006 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n",
4007 fdc
, reply_buffer
[0] >> 5);
4008 return FDC_82078_UNKN
;
4010 } /* get_fdc_version */
4012 /* lilo configuration */
4014 static void __init
floppy_set_flags(int *ints
, int param
, int param2
)
4018 for (i
= 0; i
< ARRAY_SIZE(default_drive_params
); i
++) {
4020 default_drive_params
[i
].params
.flags
|= param2
;
4022 default_drive_params
[i
].params
.flags
&= ~param2
;
4024 DPRINT("%s flag 0x%x\n", param2
? "Setting" : "Clearing", param
);
4027 static void __init
daring(int *ints
, int param
, int param2
)
4031 for (i
= 0; i
< ARRAY_SIZE(default_drive_params
); i
++) {
4033 default_drive_params
[i
].params
.select_delay
= 0;
4034 default_drive_params
[i
].params
.flags
|=
4035 FD_SILENT_DCL_CLEAR
;
4037 default_drive_params
[i
].params
.select_delay
=
4039 default_drive_params
[i
].params
.flags
&=
4040 ~FD_SILENT_DCL_CLEAR
;
4043 DPRINT("Assuming %s floppy hardware\n", param
? "standard" : "broken");
4046 static void __init
set_cmos(int *ints
, int dummy
, int dummy2
)
4048 int current_drive
= 0;
4051 DPRINT("wrong number of parameters for CMOS\n");
4054 current_drive
= ints
[1];
4055 if (current_drive
< 0 || current_drive
>= 8) {
4056 DPRINT("bad drive for set_cmos\n");
4060 if (current_drive
>= 4 && !FDC2
)
4064 DPRINT("setting CMOS code to %d\n", ints
[2]);
4067 static struct param_table
{
4069 void (*fn
) (int *ints
, int param
, int param2
);
4073 } config_params
[] __initdata
= {
4074 {"allowed_drive_mask", NULL
, &allowed_drive_mask
, 0xff, 0}, /* obsolete */
4075 {"all_drives", NULL
, &allowed_drive_mask
, 0xff, 0}, /* obsolete */
4076 {"asus_pci", NULL
, &allowed_drive_mask
, 0x33, 0},
4077 {"irq", NULL
, &FLOPPY_IRQ
, 6, 0},
4078 {"dma", NULL
, &FLOPPY_DMA
, 2, 0},
4079 {"daring", daring
, NULL
, 1, 0},
4081 {"two_fdc", NULL
, &FDC2
, 0x370, 0},
4082 {"one_fdc", NULL
, &FDC2
, 0, 0},
4084 {"thinkpad", floppy_set_flags
, NULL
, 1, FD_INVERTED_DCL
},
4085 {"broken_dcl", floppy_set_flags
, NULL
, 1, FD_BROKEN_DCL
},
4086 {"messages", floppy_set_flags
, NULL
, 1, FTD_MSG
},
4087 {"silent_dcl_clear", floppy_set_flags
, NULL
, 1, FD_SILENT_DCL_CLEAR
},
4088 {"debug", floppy_set_flags
, NULL
, 1, FD_DEBUG
},
4089 {"nodma", NULL
, &can_use_virtual_dma
, 1, 0},
4090 {"omnibook", NULL
, &can_use_virtual_dma
, 1, 0},
4091 {"yesdma", NULL
, &can_use_virtual_dma
, 0, 0},
4092 {"fifo_depth", NULL
, &fifo_depth
, 0xa, 0},
4093 {"nofifo", NULL
, &no_fifo
, 0x20, 0},
4094 {"usefifo", NULL
, &no_fifo
, 0, 0},
4095 {"cmos", set_cmos
, NULL
, 0, 0},
4096 {"slow", NULL
, &slow_floppy
, 1, 0},
4097 {"unexpected_interrupts", NULL
, &print_unex
, 1, 0},
4098 {"no_unexpected_interrupts", NULL
, &print_unex
, 0, 0},
4099 {"L40SX", NULL
, &print_unex
, 0, 0}
4104 static int __init
floppy_setup(char *str
)
4110 str
= get_options(str
, ARRAY_SIZE(ints
), ints
);
4112 for (i
= 0; i
< ARRAY_SIZE(config_params
); i
++) {
4113 if (strcmp(str
, config_params
[i
].name
) == 0) {
4117 param
= config_params
[i
].def_param
;
4118 if (config_params
[i
].fn
)
4119 config_params
[i
].fn(ints
, param
,
4122 if (config_params
[i
].var
) {
4123 DPRINT("%s=%d\n", str
, param
);
4124 *config_params
[i
].var
= param
;
4131 DPRINT("unknown floppy option [%s]\n", str
);
4133 DPRINT("allowed options are:");
4134 for (i
= 0; i
< ARRAY_SIZE(config_params
); i
++)
4135 pr_cont(" %s", config_params
[i
].name
);
4138 DPRINT("botched floppy option\n");
4139 DPRINT("Read Documentation/blockdev/floppy.txt\n");
4143 static int have_no_fdc
= -ENODEV
;
4145 static ssize_t
floppy_cmos_show(struct device
*dev
,
4146 struct device_attribute
*attr
, char *buf
)
4148 struct platform_device
*p
= to_platform_device(dev
);
4152 return sprintf(buf
, "%X\n", UDP
->cmos
);
4155 DEVICE_ATTR(cmos
, S_IRUGO
, floppy_cmos_show
, NULL
);
4157 static void floppy_device_release(struct device
*dev
)
4161 static int floppy_resume(struct device
*dev
)
4165 for (fdc
= 0; fdc
< N_FDC
; fdc
++)
4166 if (FDCS
->address
!= -1)
4167 user_reset_fdc(-1, FD_RESET_ALWAYS
, 0);
4172 static const struct dev_pm_ops floppy_pm_ops
= {
4173 .resume
= floppy_resume
,
4174 .restore
= floppy_resume
,
4177 static struct platform_driver floppy_driver
= {
4180 .pm
= &floppy_pm_ops
,
4184 static struct platform_device floppy_device
[N_DRIVE
];
4186 static struct kobject
*floppy_find(dev_t dev
, int *part
, void *data
)
4188 int drive
= (*part
& 3) | ((*part
& 0x80) >> 5);
4189 if (drive
>= N_DRIVE
||
4190 !(allowed_drive_mask
& (1 << drive
)) ||
4191 fdc_state
[FDC(drive
)].version
== FDC_NONE
)
4193 if (((*part
>> 2) & 0x1f) >= ARRAY_SIZE(floppy_type
))
4196 return get_disk(disks
[drive
]);
4199 static int __init
floppy_init(void)
4204 #if defined(CONFIG_PPC)
4205 if (check_legacy_ioport(FDC1
))
4211 for (dr
= 0; dr
< N_DRIVE
; dr
++) {
4212 disks
[dr
] = alloc_disk(1);
4218 disks
[dr
]->major
= FLOPPY_MAJOR
;
4219 disks
[dr
]->first_minor
= TOMINOR(dr
);
4220 disks
[dr
]->fops
= &floppy_fops
;
4221 sprintf(disks
[dr
]->disk_name
, "fd%d", dr
);
4223 init_timer(&motor_off_timer
[dr
]);
4224 motor_off_timer
[dr
].data
= dr
;
4225 motor_off_timer
[dr
].function
= motor_off_callback
;
4228 err
= register_blkdev(FLOPPY_MAJOR
, "fd");
4232 err
= platform_driver_register(&floppy_driver
);
4234 goto out_unreg_blkdev
;
4236 floppy_queue
= blk_init_queue(do_fd_request
, &floppy_lock
);
4237 if (!floppy_queue
) {
4239 goto out_unreg_driver
;
4241 blk_queue_max_hw_sectors(floppy_queue
, 64);
4243 blk_register_region(MKDEV(FLOPPY_MAJOR
, 0), 256, THIS_MODULE
,
4244 floppy_find
, NULL
, NULL
);
4246 for (i
= 0; i
< 256; i
++)
4248 floppy_sizes
[i
] = floppy_type
[ITYPE(i
)].size
;
4250 floppy_sizes
[i
] = MAX_DISK_SIZE
<< 1;
4252 reschedule_timeout(MAXTIMEOUT
, "floppy init", MAXTIMEOUT
);
4255 for (i
= 0; i
< N_FDC
; i
++) {
4257 memset(FDCS
, 0, sizeof(*FDCS
));
4260 #if defined(__sparc__) || defined(__mc68000__)
4261 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4265 FDCS
->version
= FDC_82072A
;
4269 use_virtual_dma
= can_use_virtual_dma
& 1;
4270 fdc_state
[0].address
= FDC1
;
4271 if (fdc_state
[0].address
== -1) {
4272 del_timer(&fd_timeout
);
4274 goto out_unreg_region
;
4277 fdc_state
[1].address
= FDC2
;
4280 fdc
= 0; /* reset fdc in case of unexpected interrupt */
4281 err
= floppy_grab_irq_and_dma();
4283 del_timer(&fd_timeout
);
4285 goto out_unreg_region
;
4288 /* initialise drive state */
4289 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
4290 memset(UDRS
, 0, sizeof(*UDRS
));
4291 memset(UDRWE
, 0, sizeof(*UDRWE
));
4292 USETF(FD_DISK_NEWCHANGE
);
4293 USETF(FD_DISK_CHANGED
);
4295 UDRS
->fd_device
= -1;
4296 floppy_track_buffer
= NULL
;
4297 max_buffer_sectors
= 0;
4300 * Small 10 msec delay to let through any interrupt that
4301 * initialization might have triggered, to not
4302 * confuse detection:
4306 for (i
= 0; i
< N_FDC
; i
++) {
4308 FDCS
->driver_version
= FD_DRIVER_VERSION
;
4309 for (unit
= 0; unit
< 4; unit
++)
4310 FDCS
->track
[unit
] = 0;
4311 if (FDCS
->address
== -1)
4314 if (user_reset_fdc(-1, FD_RESET_ALWAYS
, 0)) {
4315 /* free ioports reserved by floppy_grab_irq_and_dma() */
4316 floppy_release_regions(fdc
);
4318 FDCS
->version
= FDC_NONE
;
4321 /* Try to determine the floppy controller type */
4322 FDCS
->version
= get_fdc_version();
4323 if (FDCS
->version
== FDC_NONE
) {
4324 /* free ioports reserved by floppy_grab_irq_and_dma() */
4325 floppy_release_regions(fdc
);
4329 if (can_use_virtual_dma
== 2 && FDCS
->version
< FDC_82072A
)
4330 can_use_virtual_dma
= 0;
4333 /* Not all FDCs seem to be able to handle the version command
4334 * properly, so force a reset for the standard FDC clones,
4335 * to avoid interrupt garbage.
4337 user_reset_fdc(-1, FD_RESET_ALWAYS
, 0);
4340 del_timer(&fd_timeout
);
4344 DPRINT("no floppy controllers found\n");
4346 goto out_flush_work
;
4349 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
4350 if (!(allowed_drive_mask
& (1 << drive
)))
4352 if (fdc_state
[FDC(drive
)].version
== FDC_NONE
)
4355 floppy_device
[drive
].name
= floppy_device_name
;
4356 floppy_device
[drive
].id
= drive
;
4357 floppy_device
[drive
].dev
.release
= floppy_device_release
;
4359 err
= platform_device_register(&floppy_device
[drive
]);
4361 goto out_flush_work
;
4363 err
= device_create_file(&floppy_device
[drive
].dev
,
4366 goto out_unreg_platform_dev
;
4368 /* to be cleaned up... */
4369 disks
[drive
]->private_data
= (void *)(long)drive
;
4370 disks
[drive
]->queue
= floppy_queue
;
4371 disks
[drive
]->flags
|= GENHD_FL_REMOVABLE
;
4372 disks
[drive
]->driverfs_dev
= &floppy_device
[drive
].dev
;
4373 add_disk(disks
[drive
]);
4378 out_unreg_platform_dev
:
4379 platform_device_unregister(&floppy_device
[drive
]);
4381 flush_scheduled_work();
4383 floppy_release_irq_and_dma();
4385 blk_unregister_region(MKDEV(FLOPPY_MAJOR
, 0), 256);
4386 blk_cleanup_queue(floppy_queue
);
4388 platform_driver_unregister(&floppy_driver
);
4390 unregister_blkdev(FLOPPY_MAJOR
, "fd");
4393 del_timer(&motor_off_timer
[dr
]);
4394 put_disk(disks
[dr
]);
4399 static DEFINE_SPINLOCK(floppy_usage_lock
);
4401 static const struct io_region
{
4406 /* address + 3 is sometimes reserved by pnp bios for motherboard */
4408 /* address + 6 is reserved, and may be taken by IDE.
4409 * Unfortunately, Adaptec doesn't know this :-(, */
4413 static void floppy_release_allocated_regions(int fdc
, const struct io_region
*p
)
4415 while (p
!= io_regions
) {
4417 release_region(FDCS
->address
+ p
->offset
, p
->size
);
4421 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
4423 static int floppy_request_regions(int fdc
)
4425 const struct io_region
*p
;
4427 for (p
= io_regions
; p
< ARRAY_END(io_regions
); p
++) {
4428 if (!request_region(FDCS
->address
+ p
->offset
,
4429 p
->size
, "floppy")) {
4430 DPRINT("Floppy io-port 0x%04lx in use\n",
4431 FDCS
->address
+ p
->offset
);
4432 floppy_release_allocated_regions(fdc
, p
);
4439 static void floppy_release_regions(int fdc
)
4441 floppy_release_allocated_regions(fdc
, ARRAY_END(io_regions
));
4444 static int floppy_grab_irq_and_dma(void)
4446 unsigned long flags
;
4448 spin_lock_irqsave(&floppy_usage_lock
, flags
);
4449 if (usage_count
++) {
4450 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4453 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4456 * We might have scheduled a free_irq(), wait it to
4459 flush_scheduled_work();
4461 if (fd_request_irq()) {
4462 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4464 spin_lock_irqsave(&floppy_usage_lock
, flags
);
4466 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4469 if (fd_request_dma()) {
4470 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4472 if (can_use_virtual_dma
& 2)
4473 use_virtual_dma
= can_use_virtual_dma
= 1;
4474 if (!(can_use_virtual_dma
& 1)) {
4476 spin_lock_irqsave(&floppy_usage_lock
, flags
);
4478 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4483 for (fdc
= 0; fdc
< N_FDC
; fdc
++) {
4484 if (FDCS
->address
!= -1) {
4485 if (floppy_request_regions(fdc
))
4489 for (fdc
= 0; fdc
< N_FDC
; fdc
++) {
4490 if (FDCS
->address
!= -1) {
4492 fd_outb(FDCS
->dor
, FD_DOR
);
4496 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4498 for (fdc
= 0; fdc
< N_FDC
; fdc
++)
4499 if (FDCS
->address
!= -1)
4500 fd_outb(FDCS
->dor
, FD_DOR
);
4502 * The driver will try and free resources and relies on us
4503 * to know if they were allocated or not.
4506 irqdma_allocated
= 1;
4512 floppy_release_regions(fdc
);
4513 spin_lock_irqsave(&floppy_usage_lock
, flags
);
4515 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4519 static void floppy_release_irq_and_dma(void)
4522 #ifdef FLOPPY_SANITY_CHECK
4528 unsigned long tmpaddr
;
4529 unsigned long flags
;
4531 spin_lock_irqsave(&floppy_usage_lock
, flags
);
4532 if (--usage_count
) {
4533 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4536 spin_unlock_irqrestore(&floppy_usage_lock
, flags
);
4537 if (irqdma_allocated
) {
4541 irqdma_allocated
= 0;
4547 floppy_enable_hlt();
4549 if (floppy_track_buffer
&& max_buffer_sectors
) {
4550 tmpsize
= max_buffer_sectors
* 1024;
4551 tmpaddr
= (unsigned long)floppy_track_buffer
;
4552 floppy_track_buffer
= NULL
;
4553 max_buffer_sectors
= 0;
4554 buffer_min
= buffer_max
= -1;
4555 fd_dma_mem_free(tmpaddr
, tmpsize
);
4557 #ifdef FLOPPY_SANITY_CHECK
4559 for (drive
= 0; drive
< N_FDC
* 4; drive
++)
4560 if (timer_pending(motor_off_timer
+ drive
))
4561 pr_info("motor off timer %d still active\n", drive
);
4564 if (timer_pending(&fd_timeout
))
4565 pr_info("floppy timer still active:%s\n", timeout_message
);
4566 if (timer_pending(&fd_timer
))
4567 pr_info("auxiliary floppy timer still active\n");
4568 if (work_pending(&floppy_work
))
4569 pr_info("work still pending\n");
4572 for (fdc
= 0; fdc
< N_FDC
; fdc
++)
4573 if (FDCS
->address
!= -1)
4574 floppy_release_regions(fdc
);
4580 static char *floppy
;
4582 static void __init
parse_floppy_cfg_string(char *cfg
)
4588 while (*cfg
&& *cfg
!= ' ' && *cfg
!= '\t')
4599 static int __init
floppy_module_init(void)
4602 parse_floppy_cfg_string(floppy
);
4603 return floppy_init();
4605 module_init(floppy_module_init
);
4607 static void __exit
floppy_module_exit(void)
4611 blk_unregister_region(MKDEV(FLOPPY_MAJOR
, 0), 256);
4612 unregister_blkdev(FLOPPY_MAJOR
, "fd");
4613 platform_driver_unregister(&floppy_driver
);
4615 for (drive
= 0; drive
< N_DRIVE
; drive
++) {
4616 del_timer_sync(&motor_off_timer
[drive
]);
4618 if ((allowed_drive_mask
& (1 << drive
)) &&
4619 fdc_state
[FDC(drive
)].version
!= FDC_NONE
) {
4620 del_gendisk(disks
[drive
]);
4621 device_remove_file(&floppy_device
[drive
].dev
, &dev_attr_cmos
);
4622 platform_device_unregister(&floppy_device
[drive
]);
4624 put_disk(disks
[drive
]);
4627 del_timer_sync(&fd_timeout
);
4628 del_timer_sync(&fd_timer
);
4629 blk_cleanup_queue(floppy_queue
);
4632 floppy_release_irq_and_dma();
4634 /* eject disk, if any */
4638 module_exit(floppy_module_exit
);
4640 module_param(floppy
, charp
, 0);
4641 module_param(FLOPPY_IRQ
, int, 0);
4642 module_param(FLOPPY_DMA
, int, 0);
4643 MODULE_AUTHOR("Alain L. Knaff");
4644 MODULE_SUPPORTED_DEVICE("fd");
4645 MODULE_LICENSE("GPL");
4647 /* This doesn't actually get used other than for module information */
4648 static const struct pnp_device_id floppy_pnpids
[] = {
4653 MODULE_DEVICE_TABLE(pnp
, floppy_pnpids
);
4657 __setup("floppy=", floppy_setup
);
4658 module_init(floppy_init
)
4661 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR
);