2 * linux/drivers/block/floppy.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 * Copyright (C) 1993, 1994 Alain Knaff
6 * Copyright (C) 1998 Alan Cox
10 * 02.12.91 - Changed to static variables to indicate need for reset
11 * and recalibrate. This makes some things easier (output_byte reset
12 * checking etc), and means less interrupt jumping in case of errors,
13 * so the code is hopefully easier to understand.
17 * This file is certainly a mess. I've tried my best to get it working,
18 * but I don't like programming floppies, and I have only one anyway.
19 * Urgel. I should check for more errors, and do more graceful error
20 * recovery. Seems there are problems with several drives. I've tried to
21 * correct them. No promises.
25 * As with hd.c, all routines within this file can (and will) be called
26 * by interrupts, so extreme caution is needed. A hardware interrupt
27 * handler may not sleep, or a kernel panic will happen. Thus I cannot
28 * call "floppy-on" directly, but have to set a special timer interrupt
33 * 28.02.92 - made track-buffering routines, based on the routines written
34 * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus.
38 * Automatic floppy-detection and formatting written by Werner Almesberger
39 * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with
40 * the floppy-change signal detection.
44 * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed
45 * FDC data overrun bug, added some preliminary stuff for vertical
48 * 1992/9/17: Added DMA allocation & DMA functions. -- hhb.
50 * TODO: Errors are still not counted properly.
54 * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl)
55 * modeled after the freeware MS-DOS program fdformat/88 V1.8 by
56 * Christoph H. Hochst\"atter.
57 * I have fixed the shift values to the ones I always use. Maybe a new
58 * ioctl() should be created to be able to modify them.
59 * There is a bug in the driver that makes it impossible to format a
60 * floppy as the first thing after bootup.
64 * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and
65 * this helped the floppy driver as well. Much cleaner, and still seems to
69 /* 1994/6/24 --bbroad-- added the floppy table entries and made
70 * minor modifications to allow 2.88 floppies to be run.
73 /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more
78 * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger
79 * format bug fixes, but unfortunately some new bugs too...
82 /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write
83 * errors to allow safe writing by specialized programs.
86 /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks
87 * by defining bit 1 of the "stretch" parameter to mean put sectors on the
88 * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's
89 * drives are "upside-down").
93 * 1995/8/26 -- Andreas Busse -- added Mips support.
97 * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent
98 * features to asm/floppy.h.
102 * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
106 * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of
107 * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting &
108 * use of '0' for NULL.
112 * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation
117 * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives.
121 * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24
122 * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were
123 * being used to store jiffies, which are unsigned longs).
127 * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br>
128 * - get rid of check_region
133 * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no
134 * floppy controller (lingering task on list after module is gone... boom.)
138 * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range
139 * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix
140 * requires many non-obvious changes in arch dependent code.
143 /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>.
144 * Better audit of register_blkdev.
147 #define FLOPPY_SANITY_CHECK
148 #undef FLOPPY_SILENT_DCL_CLEAR
150 #define REALLY_SLOW_IO
153 #define DCL_DEBUG /* debug disk change line */
155 /* do print messages for unexpected interrupts */
156 static int print_unex = 1;
157 #include <linux/module.h>
158 #include <linux/sched.h>
159 #include <linux/fs.h>
160 #include <linux/kernel.h>
161 #include <linux/timer.h>
162 #include <linux/workqueue.h>
164 #include <linux/fdreg.h>
165 #include <linux/fd.h>
166 #include <linux/hdreg.h>
167 #include <linux/errno.h>
168 #include <linux/slab.h>
169 #include <linux/mm.h>
170 #include <linux/bio.h>
171 #include <linux/string.h>
172 #include <linux/jiffies.h>
173 #include <linux/fcntl.h>
174 #include <linux/delay.h>
175 #include <linux/mc146818rtc.h> /* CMOS defines */
176 #include <linux/ioport.h>
177 #include <linux/interrupt.h>
178 #include <linux/init.h>
179 #include <linux/platform_device.h>
180 #include <linux/buffer_head.h> /* for invalidate_buffers() */
181 #include <linux/mutex.h>
184 * PS/2 floppies have much slower step rates than regular floppies.
185 * It's been recommended that take about 1/4 of the default speed
186 * in some more extreme cases.
188 static int slow_floppy;
192 #include <asm/system.h>
194 #include <asm/uaccess.h>
196 static int FLOPPY_IRQ = 6;
197 static int FLOPPY_DMA = 2;
198 static int can_use_virtual_dma = 2;
200 * can use virtual DMA:
201 * 0 = use of virtual DMA disallowed by config
202 * 1 = use of virtual DMA prescribed by config
203 * 2 = no virtual DMA preference configured. By default try hard DMA,
204 * but fall back on virtual DMA when not enough memory available
207 static int use_virtual_dma;
211 * 1 using virtual DMA
212 * This variable is set to virtual when a DMA mem problem arises, and
213 * reset back in floppy_grab_irq_and_dma.
214 * It is not safe to reset it in other circumstances, because the floppy
215 * driver may have several buffers in use at once, and we do currently not
216 * record each buffers capabilities
219 static DEFINE_SPINLOCK(floppy_lock);
221 static unsigned short virtual_dma_port = 0x3f0;
222 irqreturn_t floppy_interrupt(int irq, void *dev_id);
223 static int set_dor(int fdc, char mask, char data);
225 #define K_64 0x10000 /* 64KB */
227 /* the following is the mask of allowed drives. By default units 2 and
228 * 3 of both floppy controllers are disabled, because switching on the
229 * motor of these drives causes system hangs on some PCI computers. drive
230 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
231 * a drive is allowed.
233 * NOTE: This must come before we include the arch floppy header because
234 * some ports reference this variable from there. -DaveM
237 static int allowed_drive_mask = 0x33;
239 #include <asm/floppy.h>
241 static int irqdma_allocated;
243 #define DEVICE_NAME "floppy"
245 #include <linux/blkdev.h>
246 #include <linux/blkpg.h>
247 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
248 #include <linux/completion.h>
250 static struct request *current_req;
251 static struct request_queue *floppy_queue;
252 static void do_fd_request(struct request_queue * q);
254 #ifndef fd_get_dma_residue
255 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
258 /* Dma Memory related stuff */
260 #ifndef fd_dma_mem_free
261 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
264 #ifndef fd_dma_mem_alloc
265 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL,get_order(size))
268 static inline void fallback_on_nodma_alloc(char **addr, size_t l)
270 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
272 return; /* we have the memory */
273 if (can_use_virtual_dma != 2)
274 return; /* no fallback allowed */
275 printk("DMA memory shortage. Temporarily falling back on virtual DMA\n");
276 *addr = (char *)nodma_mem_alloc(l);
282 /* End dma memory related stuff */
284 static unsigned long fake_change;
285 static int initialising = 1;
287 #define ITYPE(x) (((x)>>2) & 0x1f)
288 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
289 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
290 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
291 /* reverse mapping from unit and fdc to drive */
292 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
293 #define DP (&drive_params[current_drive])
294 #define DRS (&drive_state[current_drive])
295 #define DRWE (&write_errors[current_drive])
296 #define FDCS (&fdc_state[fdc])
297 #define CLEARF(x) clear_bit(x##_BIT, &DRS->flags)
298 #define SETF(x) set_bit(x##_BIT, &DRS->flags)
299 #define TESTF(x) test_bit(x##_BIT, &DRS->flags)
301 #define UDP (&drive_params[drive])
302 #define UDRS (&drive_state[drive])
303 #define UDRWE (&write_errors[drive])
304 #define UFDCS (&fdc_state[FDC(drive)])
305 #define UCLEARF(x) clear_bit(x##_BIT, &UDRS->flags)
306 #define USETF(x) set_bit(x##_BIT, &UDRS->flags)
307 #define UTESTF(x) test_bit(x##_BIT, &UDRS->flags)
309 #define DPRINT(format, args...) printk(DEVICE_NAME "%d: " format, current_drive , ## args)
311 #define PH_HEAD(floppy,head) (((((floppy)->stretch & 2) >>1) ^ head) << 2)
312 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
314 #define CLEARSTRUCT(x) memset((x), 0, sizeof(*(x)))
317 #define COMMAND raw_cmd->cmd[0]
318 #define DR_SELECT raw_cmd->cmd[1]
319 #define TRACK raw_cmd->cmd[2]
320 #define HEAD raw_cmd->cmd[3]
321 #define SECTOR raw_cmd->cmd[4]
322 #define SIZECODE raw_cmd->cmd[5]
323 #define SECT_PER_TRACK raw_cmd->cmd[6]
324 #define GAP raw_cmd->cmd[7]
325 #define SIZECODE2 raw_cmd->cmd[8]
329 #define F_SIZECODE raw_cmd->cmd[2]
330 #define F_SECT_PER_TRACK raw_cmd->cmd[3]
331 #define F_GAP raw_cmd->cmd[4]
332 #define F_FILL raw_cmd->cmd[5]
336 * Maximum disk size (in kilobytes). This default is used whenever the
337 * current disk size is unknown.
338 * [Now it is rather a minimum]
340 #define MAX_DISK_SIZE 4 /* 3984 */
343 * globals used by 'result()'
345 #define MAX_REPLIES 16
346 static unsigned char reply_buffer[MAX_REPLIES];
347 static int inr; /* size of reply buffer, when called from interrupt */
348 #define ST0 (reply_buffer[0])
349 #define ST1 (reply_buffer[1])
350 #define ST2 (reply_buffer[2])
351 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */
352 #define R_TRACK (reply_buffer[3])
353 #define R_HEAD (reply_buffer[4])
354 #define R_SECTOR (reply_buffer[5])
355 #define R_SIZECODE (reply_buffer[6])
356 #define SEL_DLY (2*HZ/100)
359 * this struct defines the different floppy drive types.
362 struct floppy_drive_params params;
363 const char *name; /* name printed while booting */
364 } default_drive_params[] = {
365 /* NOTE: the time values in jiffies should be in msec!
367 | Maximum data rate supported by drive type
368 | | Head load time, msec
369 | | | Head unload time, msec (not used)
370 | | | | Step rate interval, usec
371 | | | | | Time needed for spinup time (jiffies)
372 | | | | | | Timeout for spinning down (jiffies)
373 | | | | | | | Spindown offset (where disk stops)
374 | | | | | | | | Select delay
375 | | | | | | | | | RPS
376 | | | | | | | | | | Max number of tracks
377 | | | | | | | | | | | Interrupt timeout
378 | | | | | | | | | | | | Max nonintlv. sectors
379 | | | | | | | | | | | | | -Max Errors- flags */
380 {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0,
381 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" },
383 {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0,
384 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
386 {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0,
387 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
389 {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
390 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/
392 {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
393 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/
395 {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
396 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
398 {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
399 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/
400 /* | --autodetected formats--- | | |
401 * read_track | | Name printed when booting
403 * Frequency of disk change checks */
406 static struct floppy_drive_params drive_params[N_DRIVE];
407 static struct floppy_drive_struct drive_state[N_DRIVE];
408 static struct floppy_write_errors write_errors[N_DRIVE];
409 static struct timer_list motor_off_timer[N_DRIVE];
410 static struct gendisk *disks[N_DRIVE];
411 static struct block_device *opened_bdev[N_DRIVE];
412 static DEFINE_MUTEX(open_lock);
413 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
416 * This struct defines the different floppy types.
418 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
419 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
420 * tells if the disk is in Commodore 1581 format, which means side 0 sectors
421 * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
422 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
423 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
424 * side 0 is on physical side 0 (but with the misnamed sector IDs).
425 * 'stretch' should probably be renamed to something more general, like
428 * Bits 2 through 9 of 'stretch' tell the number of the first sector.
429 * The LSB (bit 2) is flipped. For most disks, the first sector
430 * is 1 (represented by 0x00<<2). For some CP/M and music sampler
431 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
432 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
434 * Other parameters should be self-explanatory (see also setfdprm(8)).
443 | | | | | | Data rate, | 0x40 for perp
444 | | | | | | | Spec1 (stepping rate, head unload
445 | | | | | | | | /fmt gap (gap2) */
446 static struct floppy_struct floppy_type[32] = {
447 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */
448 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
449 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
450 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
451 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
452 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
453 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
454 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
455 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
456 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
458 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
459 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
460 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
461 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
462 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
463 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
464 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
465 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
466 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
467 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
469 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
470 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
471 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
472 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
473 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
474 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
475 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
476 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
477 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
478 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
480 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
481 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
484 #define SECTSIZE (_FD_SECTSIZE(*floppy))
486 /* Auto-detection: Disk type used until the next media change occurs. */
487 static struct floppy_struct *current_type[N_DRIVE];
490 * User-provided type information. current_type points to
491 * the respective entry of this array.
493 static struct floppy_struct user_params[N_DRIVE];
495 static sector_t floppy_sizes[256];
497 static char floppy_device_name[] = "floppy";
500 * The driver is trying to determine the correct media format
501 * while probing is set. rw_interrupt() clears it after a
506 /* Synchronization of FDC access. */
507 #define FD_COMMAND_NONE -1
508 #define FD_COMMAND_ERROR 2
509 #define FD_COMMAND_OKAY 3
511 static volatile int command_status = FD_COMMAND_NONE;
512 static unsigned long fdc_busy;
513 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
514 static DECLARE_WAIT_QUEUE_HEAD(command_done);
516 #define NO_SIGNAL (!interruptible || !signal_pending(current))
517 #define CALL(x) if ((x) == -EINTR) return -EINTR
518 #define ECALL(x) if ((ret = (x))) return ret;
519 #define _WAIT(x,i) CALL(ret=wait_til_done((x),i))
520 #define WAIT(x) _WAIT((x),interruptible)
521 #define IWAIT(x) _WAIT((x),1)
523 /* Errors during formatting are counted here. */
524 static int format_errors;
526 /* Format request descriptor. */
527 static struct format_descr format_req;
530 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
531 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
532 * H is head unload time (1=16ms, 2=32ms, etc)
537 * Because these are written to by the DMA controller, they must
538 * not contain a 64k byte boundary crossing, or data will be
541 static char *floppy_track_buffer;
542 static int max_buffer_sectors;
545 typedef void (*done_f)(int);
546 static struct cont_t {
547 void (*interrupt)(void); /* this is called after the interrupt of the
549 void (*redo)(void); /* this is called to retry the operation */
550 void (*error)(void); /* this is called to tally an error */
551 done_f done; /* this is called to say if the operation has
552 * succeeded/failed */
555 static void floppy_ready(void);
556 static void floppy_start(void);
557 static void process_fd_request(void);
558 static void recalibrate_floppy(void);
559 static void floppy_shutdown(unsigned long);
561 static int floppy_grab_irq_and_dma(void);
562 static void floppy_release_irq_and_dma(void);
565 * The "reset" variable should be tested whenever an interrupt is scheduled,
566 * after the commands have been sent. This is to ensure that the driver doesn't
567 * get wedged when the interrupt doesn't come because of a failed command.
568 * reset doesn't need to be tested before sending commands, because
569 * output_byte is automatically disabled when reset is set.
571 #define CHECK_RESET { if (FDCS->reset){ reset_fdc(); return; } }
572 static void reset_fdc(void);
575 * These are global variables, as that's the easiest way to give
576 * information to interrupts. They are the data used for the current
580 #define NEED_1_RECAL -2
581 #define NEED_2_RECAL -3
583 static int usage_count;
585 /* buffer related variables */
586 static int buffer_track = -1;
587 static int buffer_drive = -1;
588 static int buffer_min = -1;
589 static int buffer_max = -1;
591 /* fdc related variables, should end up in a struct */
592 static struct floppy_fdc_state fdc_state[N_FDC];
593 static int fdc; /* current fdc */
595 static struct floppy_struct *_floppy = floppy_type;
596 static unsigned char current_drive;
597 static long current_count_sectors;
598 static unsigned char fsector_t; /* sector in track */
599 static unsigned char in_sector_offset; /* offset within physical sector,
600 * expressed in units of 512 bytes */
603 static inline int fd_eject(int drive)
614 static long unsigned debugtimer;
616 static inline void set_debugt(void)
618 debugtimer = jiffies;
621 static inline void debugt(const char *message)
623 if (DP->flags & DEBUGT)
624 printk("%s dtime=%lu\n", message, jiffies - debugtimer);
627 static inline void set_debugt(void) { }
628 static inline void debugt(const char *message) { }
631 typedef void (*timeout_fn) (unsigned long);
632 static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0);
634 static const char *timeout_message;
636 #ifdef FLOPPY_SANITY_CHECK
637 static void is_alive(const char *message)
639 /* this routine checks whether the floppy driver is "alive" */
640 if (test_bit(0, &fdc_busy) && command_status < 2
641 && !timer_pending(&fd_timeout)) {
642 DPRINT("timeout handler died: %s\n", message);
647 static void (*do_floppy) (void) = NULL;
649 #ifdef FLOPPY_SANITY_CHECK
653 static void (*lasthandler) (void);
654 static unsigned long interruptjiffies;
655 static unsigned long resultjiffies;
656 static int resultsize;
657 static unsigned long lastredo;
659 static struct output_log {
661 unsigned char status;
662 unsigned long jiffies;
663 } output_log[OLOGSIZE];
665 static int output_log_pos;
668 #define current_reqD -1
669 #define MAXTIMEOUT -2
671 static void __reschedule_timeout(int drive, const char *message, int marg)
673 if (drive == current_reqD)
674 drive = current_drive;
675 del_timer(&fd_timeout);
676 if (drive < 0 || drive >= N_DRIVE) {
677 fd_timeout.expires = jiffies + 20UL * HZ;
680 fd_timeout.expires = jiffies + UDP->timeout;
681 add_timer(&fd_timeout);
682 if (UDP->flags & FD_DEBUG) {
683 DPRINT("reschedule timeout ");
684 printk(message, marg);
687 timeout_message = message;
690 static void reschedule_timeout(int drive, const char *message, int marg)
694 spin_lock_irqsave(&floppy_lock, flags);
695 __reschedule_timeout(drive, message, marg);
696 spin_unlock_irqrestore(&floppy_lock, flags);
699 #define INFBOUND(a,b) (a)=max_t(int, a, b)
700 #define SUPBOUND(a,b) (a)=min_t(int, a, b)
703 * Bottom half floppy driver.
704 * ==========================
706 * This part of the file contains the code talking directly to the hardware,
707 * and also the main service loop (seek-configure-spinup-command)
712 * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
713 * and the last_checked date.
715 * last_checked is the date of the last check which showed 'no disk change'
716 * FD_DISK_CHANGE is set under two conditions:
717 * 1. The floppy has been changed after some i/o to that floppy already
719 * 2. No floppy disk is in the drive. This is done in order to ensure that
720 * requests are quickly flushed in case there is no disk in the drive. It
721 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
724 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
725 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
726 * each seek. If a disk is present, the disk change line should also be
727 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
728 * change line is set, this means either that no disk is in the drive, or
729 * that it has been removed since the last seek.
731 * This means that we really have a third possibility too:
732 * The floppy has been changed after the last seek.
735 static int disk_change(int drive)
737 int fdc = FDC(drive);
739 #ifdef FLOPPY_SANITY_CHECK
740 if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
741 DPRINT("WARNING disk change called early\n");
742 if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
743 (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
744 DPRINT("probing disk change on unselected drive\n");
745 DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive),
746 (unsigned int)FDCS->dor);
751 if (UDP->flags & FD_DEBUG) {
752 DPRINT("checking disk change line for drive %d\n", drive);
753 DPRINT("jiffies=%lu\n", jiffies);
754 DPRINT("disk change line=%x\n", fd_inb(FD_DIR) & 0x80);
755 DPRINT("flags=%lx\n", UDRS->flags);
758 if (UDP->flags & FD_BROKEN_DCL)
759 return UTESTF(FD_DISK_CHANGED);
760 if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) {
761 USETF(FD_VERIFY); /* verify write protection */
762 if (UDRS->maxblock) {
763 /* mark it changed */
764 USETF(FD_DISK_CHANGED);
767 /* invalidate its geometry */
768 if (UDRS->keep_data >= 0) {
769 if ((UDP->flags & FTD_MSG) &&
770 current_type[drive] != NULL)
771 DPRINT("Disk type is undefined after "
773 current_type[drive] = NULL;
774 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1;
779 UDRS->last_checked = jiffies;
780 UCLEARF(FD_DISK_NEWCHANGE);
785 static inline int is_selected(int dor, int unit)
787 return ((dor & (0x10 << unit)) && (dor & 3) == unit);
790 static int set_dor(int fdc, char mask, char data)
794 unsigned char newdor;
795 unsigned char olddor;
797 if (FDCS->address == -1)
801 newdor = (olddor & mask) | data;
802 if (newdor != olddor) {
804 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) {
805 drive = REVDRIVE(fdc, unit);
807 if (UDP->flags & FD_DEBUG) {
808 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 printk("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)
875 "Trying to lock fdc while usage count=0 at line %d\n",
880 if (test_and_set_bit(0, &fdc_busy)) {
881 DECLARE_WAITQUEUE(wait, current);
882 add_wait_queue(&fdc_wait, &wait);
885 set_current_state(TASK_INTERRUPTIBLE);
887 if (!test_and_set_bit(0, &fdc_busy))
893 remove_wait_queue(&fdc_wait, &wait);
898 set_current_state(TASK_RUNNING);
899 remove_wait_queue(&fdc_wait, &wait);
900 flush_scheduled_work();
902 command_status = FD_COMMAND_NONE;
904 __reschedule_timeout(drive, "lock fdc", 0);
909 #define lock_fdc(drive,interruptible) _lock_fdc(drive,interruptible, __LINE__)
911 #define LOCK_FDC(drive,interruptible) \
912 if (lock_fdc(drive,interruptible)) return -EINTR;
914 /* unlocks the driver */
915 static inline void unlock_fdc(void)
920 if (!test_bit(0, &fdc_busy))
921 DPRINT("FDC access conflict!\n");
924 DPRINT("device interrupt still active at FDC release: %p!\n",
926 command_status = FD_COMMAND_NONE;
927 spin_lock_irqsave(&floppy_lock, flags);
928 del_timer(&fd_timeout);
930 clear_bit(0, &fdc_busy);
931 if (elv_next_request(floppy_queue))
932 do_fd_request(floppy_queue);
933 spin_unlock_irqrestore(&floppy_lock, flags);
937 /* switches the motor off after a given timeout */
938 static void motor_off_callback(unsigned long nr)
940 unsigned char mask = ~(0x10 << UNIT(nr));
942 set_dor(FDC(nr), mask, 0);
945 /* schedules motor off */
946 static void floppy_off(unsigned int drive)
948 unsigned long volatile delta;
949 int fdc = FDC(drive);
951 if (!(FDCS->dor & (0x10 << UNIT(drive))))
954 del_timer(motor_off_timer + drive);
956 /* make spindle stop in a position which minimizes spinup time
959 delta = jiffies - UDRS->first_read_date + HZ -
960 UDP->spindown_offset;
961 delta = ((delta * UDP->rps) % HZ) / UDP->rps;
962 motor_off_timer[drive].expires =
963 jiffies + UDP->spindown - delta;
965 add_timer(motor_off_timer + drive);
969 * cycle through all N_DRIVE floppy drives, for disk change testing.
970 * stopping at current drive. This is done before any long operation, to
971 * be sure to have up to date disk change information.
973 static void scandrives(void)
979 if (DP->select_delay)
982 saved_drive = current_drive;
983 for (i = 0; i < N_DRIVE; i++) {
984 drive = (saved_drive + i + 1) % N_DRIVE;
985 if (UDRS->fd_ref == 0 || UDP->select_delay != 0)
986 continue; /* skip closed drives */
988 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &
989 (0x10 << UNIT(drive))))
990 /* switch the motor off again, if it was off to
992 set_dor(fdc, ~(0x10 << UNIT(drive)), 0);
994 set_fdc(saved_drive);
997 static void empty(void)
1001 static DECLARE_WORK(floppy_work, NULL);
1003 static void schedule_bh(void (*handler) (void))
1005 PREPARE_WORK(&floppy_work, (work_func_t)handler);
1006 schedule_work(&floppy_work);
1009 static DEFINE_TIMER(fd_timer, NULL, 0, 0);
1011 static void cancel_activity(void)
1013 unsigned long flags;
1015 spin_lock_irqsave(&floppy_lock, flags);
1017 PREPARE_WORK(&floppy_work, (work_func_t)empty);
1018 del_timer(&fd_timer);
1019 spin_unlock_irqrestore(&floppy_lock, flags);
1022 /* this function makes sure that the disk stays in the drive during the
1024 static void fd_watchdog(void)
1027 if (DP->flags & FD_DEBUG) {
1028 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 printk("zero dma transfer size:");
1110 for (i = 0; i < raw_cmd->cmd_count; i++)
1111 printk("%x,", raw_cmd->cmd[i]);
1117 if (((unsigned long)raw_cmd->kernel_data) % 512) {
1118 printk("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)
1178 if ((status = wait_til_ready()) < 0)
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 #define LAST_OUT(x) if (output_byte(x)<0){ reset_fdc();return;}
1201 /* gets the response from the fdc */
1202 static int result(void)
1207 for (i = 0; i < MAX_REPLIES; i++) {
1208 if ((status = wait_til_ready()) < 0)
1210 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA;
1211 if ((status & ~STATUS_BUSY) == STATUS_READY) {
1212 #ifdef FLOPPY_SANITY_CHECK
1213 resultjiffies = jiffies;
1218 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY))
1219 reply_buffer[i] = fd_inb(FD_DATA);
1223 if (!initialising) {
1225 ("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
1233 #define MORE_OUTPUT -2
1234 /* does the fdc need more output? */
1235 static int need_more_output(void)
1239 if ((status = wait_til_ready()) < 0)
1241 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY)
1246 /* Set perpendicular mode as required, based on data rate, if supported.
1247 * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1249 static inline void perpendicular_mode(void)
1251 unsigned char perp_mode;
1253 if (raw_cmd->rate & 0x40) {
1254 switch (raw_cmd->rate & 3) {
1262 DPRINT("Invalid data rate for perpendicular mode!\n");
1264 FDCS->reset = 1; /* convenient way to return to
1265 * redo without to much hassle (deep
1272 if (FDCS->perp_mode == perp_mode)
1274 if (FDCS->version >= FDC_82077_ORIG) {
1275 output_byte(FD_PERPENDICULAR);
1276 output_byte(perp_mode);
1277 FDCS->perp_mode = perp_mode;
1278 } else if (perp_mode) {
1279 DPRINT("perpendicular mode not supported by this FDC.\n");
1281 } /* perpendicular_mode */
1283 static int fifo_depth = 0xa;
1286 static int fdc_configure(void)
1289 output_byte(FD_CONFIGURE);
1290 if (need_more_output() != MORE_OUTPUT)
1293 output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf));
1294 output_byte(0); /* pre-compensation from track
1299 #define NOMINAL_DTR 500
1301 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1302 * head load time, and DMA disable flag to values needed by floppy.
1304 * The value "dtr" is the data transfer rate in Kbps. It is needed
1305 * to account for the data rate-based scaling done by the 82072 and 82077
1306 * FDC types. This parameter is ignored for other types of FDCs (i.e.
1309 * Note that changing the data transfer rate has a (probably deleterious)
1310 * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1311 * fdc_specify is called again after each data transfer rate
1314 * srt: 1000 to 16000 in microseconds
1315 * hut: 16 to 240 milliseconds
1316 * hlt: 2 to 254 milliseconds
1318 * These values are rounded up to the next highest available delay time.
1320 static void fdc_specify(void)
1322 unsigned char spec1;
1323 unsigned char spec2;
1327 unsigned long dtr = NOMINAL_DTR;
1328 unsigned long scale_dtr = NOMINAL_DTR;
1329 int hlt_max_code = 0x7f;
1330 int hut_max_code = 0xf;
1332 if (FDCS->need_configure && FDCS->version >= FDC_82072A) {
1334 FDCS->need_configure = 0;
1337 switch (raw_cmd->rate & 0x03) {
1343 if (FDCS->version >= FDC_82078) {
1344 /* chose the default rate table, not the one
1345 * where 1 = 2 Mbps */
1346 output_byte(FD_DRIVESPEC);
1347 if (need_more_output() == MORE_OUTPUT) {
1348 output_byte(UNIT(current_drive));
1358 if (FDCS->version >= FDC_82072) {
1360 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1361 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1364 /* Convert step rate from microseconds to milliseconds and 4 bits */
1365 srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR);
1372 hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR);
1375 else if (hlt > 0x7f)
1378 hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR);
1384 spec1 = (srt << 4) | hut;
1385 spec2 = (hlt << 1) | (use_virtual_dma & 1);
1387 /* If these parameters did not change, just return with success */
1388 if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) {
1389 /* Go ahead and set spec1 and spec2 */
1390 output_byte(FD_SPECIFY);
1391 output_byte(FDCS->spec1 = spec1);
1392 output_byte(FDCS->spec2 = spec2);
1396 /* Set the FDC's data transfer rate on behalf of the specified drive.
1397 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1398 * of the specify command (i.e. using the fdc_specify function).
1400 static int fdc_dtr(void)
1402 /* If data rate not already set to desired value, set it. */
1403 if ((raw_cmd->rate & 3) == FDCS->dtr)
1407 fd_outb(raw_cmd->rate & 3, FD_DCR);
1409 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1410 * need a stabilization period of several milliseconds to be
1411 * enforced after data rate changes before R/W operations.
1412 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1414 FDCS->dtr = raw_cmd->rate & 3;
1415 return (fd_wait_for_completion(jiffies + 2UL * HZ / 100,
1416 (timeout_fn) floppy_ready));
1419 static void tell_sector(void)
1421 printk(": track %d, head %d, sector %d, size %d",
1422 R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE);
1426 * OK, this error interpreting routine is called after a
1427 * DMA read/write has succeeded
1428 * or failed, so we check the results, and copy any buffers.
1429 * hhb: Added better error reporting.
1430 * ak: Made this into a separate routine.
1432 static int interpret_errors(void)
1437 DPRINT("-- FDC reply error");
1442 /* check IC to find cause of interrupt */
1443 switch (ST0 & ST0_INTR) {
1444 case 0x40: /* error occurred during command execution */
1446 return 0; /* occurs with pseudo-DMA */
1449 DPRINT("Drive is write protected\n");
1450 CLEARF(FD_DISK_WRITABLE);
1453 } else if (ST1 & ST1_ND) {
1454 SETF(FD_NEED_TWADDLE);
1455 } else if (ST1 & ST1_OR) {
1456 if (DP->flags & FTD_MSG)
1457 DPRINT("Over/Underrun - retrying\n");
1459 } else if (*errors >= DP->max_errors.reporting) {
1461 if (ST0 & ST0_ECE) {
1462 printk("Recalibrate failed!");
1463 } else if (ST2 & ST2_CRC) {
1464 printk("data CRC error");
1466 } else if (ST1 & ST1_CRC) {
1467 printk("CRC error");
1469 } else if ((ST1 & (ST1_MAM | ST1_ND))
1470 || (ST2 & ST2_MAM)) {
1472 printk("sector not found");
1475 printk("probe failed...");
1476 } else if (ST2 & ST2_WC) { /* seek error */
1477 printk("wrong cylinder");
1478 } else if (ST2 & ST2_BC) { /* cylinder marked as bad */
1479 printk("bad cylinder");
1482 ("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
1488 if (ST2 & ST2_WC || ST2 & ST2_BC)
1489 /* wrong cylinder => recal */
1490 DRS->track = NEED_2_RECAL;
1492 case 0x80: /* invalid command given */
1493 DPRINT("Invalid FDC command given!\n");
1497 DPRINT("Abnormal termination caused by polling\n");
1500 default: /* (0) Normal command termination */
1506 * This routine is called when everything should be correctly set up
1507 * for the transfer (i.e. floppy motor is on, the correct floppy is
1508 * selected, and the head is sitting on the right track).
1510 static void setup_rw_floppy(void)
1516 unsigned long ready_date;
1517 timeout_fn function;
1519 flags = raw_cmd->flags;
1520 if (flags & (FD_RAW_READ | FD_RAW_WRITE))
1521 flags |= FD_RAW_INTR;
1523 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) {
1524 ready_date = DRS->spinup_date + DP->spinup;
1525 /* If spinup will take a long time, rerun scandrives
1526 * again just before spinup completion. Beware that
1527 * after scandrives, we must again wait for selection.
1529 if (time_after(ready_date, jiffies + DP->select_delay)) {
1530 ready_date -= DP->select_delay;
1531 function = (timeout_fn) floppy_start;
1533 function = (timeout_fn) setup_rw_floppy;
1535 /* wait until the floppy is spinning fast enough */
1536 if (fd_wait_for_completion(ready_date, function))
1539 dflags = DRS->flags;
1541 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE))
1544 if (flags & FD_RAW_INTR)
1545 do_floppy = main_command_interrupt;
1548 for (i = 0; i < raw_cmd->cmd_count; i++)
1549 r |= output_byte(raw_cmd->cmd[i]);
1551 debugt("rw_command: ");
1559 if (!(flags & FD_RAW_INTR)) {
1562 } else if (flags & FD_RAW_NEED_DISK)
1566 static int blind_seek;
1569 * This is the routine called after every seek (or recalibrate) interrupt
1570 * from the floppy controller.
1572 static void seek_interrupt(void)
1574 debugt("seek interrupt:");
1575 if (inr != 2 || (ST0 & 0xF8) != 0x20) {
1576 DPRINT("seek failed\n");
1577 DRS->track = NEED_2_RECAL;
1582 if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) {
1584 if (DP->flags & FD_DEBUG) {
1586 ("clearing NEWCHANGE flag because of effective seek\n");
1587 DPRINT("jiffies=%lu\n", jiffies);
1590 CLEARF(FD_DISK_NEWCHANGE); /* effective seek */
1591 DRS->select_date = jiffies;
1597 static void check_wp(void)
1599 if (TESTF(FD_VERIFY)) {
1600 /* check write protection */
1601 output_byte(FD_GETSTATUS);
1602 output_byte(UNIT(current_drive));
1603 if (result() != 1) {
1608 CLEARF(FD_NEED_TWADDLE);
1610 if (DP->flags & FD_DEBUG) {
1611 DPRINT("checking whether disk is write protected\n");
1612 DPRINT("wp=%x\n", ST3 & 0x40);
1616 SETF(FD_DISK_WRITABLE);
1618 CLEARF(FD_DISK_WRITABLE);
1622 static void seek_floppy(void)
1629 if (DP->flags & FD_DEBUG) {
1630 DPRINT("calling disk change from seek\n");
1634 if (!TESTF(FD_DISK_NEWCHANGE) &&
1635 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) {
1636 /* the media changed flag should be cleared after the seek.
1637 * If it isn't, this means that there is really no disk in
1640 SETF(FD_DISK_CHANGED);
1645 if (DRS->track <= NEED_1_RECAL) {
1646 recalibrate_floppy();
1648 } else if (TESTF(FD_DISK_NEWCHANGE) &&
1649 (raw_cmd->flags & FD_RAW_NEED_DISK) &&
1650 (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) {
1651 /* we seek to clear the media-changed condition. Does anybody
1652 * know a more elegant way, which works on all drives? */
1654 track = raw_cmd->track - 1;
1656 if (DP->flags & FD_SILENT_DCL_CLEAR) {
1657 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0);
1659 raw_cmd->flags |= FD_RAW_NEED_SEEK;
1665 if (raw_cmd->track != DRS->track &&
1666 (raw_cmd->flags & FD_RAW_NEED_SEEK))
1667 track = raw_cmd->track;
1674 do_floppy = seek_interrupt;
1675 output_byte(FD_SEEK);
1676 output_byte(UNIT(current_drive));
1678 debugt("seek command:");
1681 static void recal_interrupt(void)
1683 debugt("recal interrupt:");
1686 else if (ST0 & ST0_ECE) {
1687 switch (DRS->track) {
1689 debugt("recal interrupt need 1 recal:");
1690 /* after a second recalibrate, we still haven't
1691 * reached track 0. Probably no drive. Raise an
1692 * error, as failing immediately might upset
1693 * computers possessed by the Devil :-) */
1698 debugt("recal interrupt need 2 recal:");
1699 /* If we already did a recalibrate,
1700 * and we are not at track 0, this
1701 * means we have moved. (The only way
1702 * not to move at recalibration is to
1703 * be already at track 0.) Clear the
1704 * new change flag */
1706 if (DP->flags & FD_DEBUG) {
1708 ("clearing NEWCHANGE flag because of second recalibrate\n");
1712 CLEARF(FD_DISK_NEWCHANGE);
1713 DRS->select_date = jiffies;
1716 debugt("recal interrupt default:");
1717 /* Recalibrate moves the head by at
1718 * most 80 steps. If after one
1719 * recalibrate we don't have reached
1720 * track 0, this might mean that we
1721 * started beyond track 80. Try
1723 DRS->track = NEED_1_RECAL;
1731 static void print_result(char *message, int inr)
1735 DPRINT("%s ", message);
1737 for (i = 0; i < inr; i++)
1738 printk("repl[%d]=%x ", i, reply_buffer[i]);
1742 /* interrupt handler. Note that this can be called externally on the Sparc */
1743 irqreturn_t floppy_interrupt(int irq, void *dev_id)
1747 void (*handler)(void) = do_floppy;
1749 lasthandler = handler;
1750 interruptjiffies = jiffies;
1752 f = claim_dma_lock();
1754 release_dma_lock(f);
1756 floppy_enable_hlt();
1758 if (fdc >= N_FDC || FDCS->address == -1) {
1759 /* we don't even know which FDC is the culprit */
1760 printk("DOR0=%x\n", fdc_state[0].dor);
1761 printk("floppy interrupt on bizarre fdc %d\n", fdc);
1762 printk("handler=%p\n", handler);
1763 is_alive("bizarre fdc");
1768 /* We have to clear the reset flag here, because apparently on boxes
1769 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
1770 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
1771 * emission of the SENSEI's.
1772 * It is OK to emit floppy commands because we are in an interrupt
1773 * handler here, and thus we have to fear no interference of other
1777 do_print = !handler && print_unex && !initialising;
1781 print_result("unexpected interrupt", inr);
1785 output_byte(FD_SENSEI);
1788 print_result("sensei", inr);
1790 } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2
1797 schedule_bh(handler);
1798 is_alive("normal interrupt end");
1800 /* FIXME! Was it really for us? */
1804 static void recalibrate_floppy(void)
1806 debugt("recalibrate floppy:");
1807 do_floppy = recal_interrupt;
1808 output_byte(FD_RECALIBRATE);
1809 LAST_OUT(UNIT(current_drive));
1813 * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1815 static void reset_interrupt(void)
1817 debugt("reset interrupt:");
1818 result(); /* get the status ready for set_fdc */
1820 printk("reset set in interrupt, calling %p\n", cont->error);
1821 cont->error(); /* a reset just after a reset. BAD! */
1827 * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1828 * or by setting the self clearing bit 7 of STATUS (newer FDCs)
1830 static void reset_fdc(void)
1832 unsigned long flags;
1834 do_floppy = reset_interrupt;
1838 /* Pseudo-DMA may intercept 'reset finished' interrupt. */
1839 /* Irrelevant for systems with true DMA (i386). */
1841 flags = claim_dma_lock();
1843 release_dma_lock(flags);
1845 if (FDCS->version >= FDC_82072A)
1846 fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS);
1848 fd_outb(FDCS->dor & ~0x04, FD_DOR);
1849 udelay(FD_RESET_DELAY);
1850 fd_outb(FDCS->dor, FD_DOR);
1854 static void show_floppy(void)
1859 printk("floppy driver state\n");
1860 printk("-------------------\n");
1861 printk("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n",
1862 jiffies, interruptjiffies, jiffies - interruptjiffies,
1865 #ifdef FLOPPY_SANITY_CHECK
1866 printk("timeout_message=%s\n", timeout_message);
1867 printk("last output bytes:\n");
1868 for (i = 0; i < OLOGSIZE; i++)
1869 printk("%2x %2x %lu\n",
1870 output_log[(i + output_log_pos) % OLOGSIZE].data,
1871 output_log[(i + output_log_pos) % OLOGSIZE].status,
1872 output_log[(i + output_log_pos) % OLOGSIZE].jiffies);
1873 printk("last result at %lu\n", resultjiffies);
1874 printk("last redo_fd_request at %lu\n", lastredo);
1875 for (i = 0; i < resultsize; i++) {
1876 printk("%2x ", reply_buffer[i]);
1881 printk("status=%x\n", fd_inb(FD_STATUS));
1882 printk("fdc_busy=%lu\n", fdc_busy);
1884 printk("do_floppy=%p\n", do_floppy);
1885 if (work_pending(&floppy_work))
1886 printk("floppy_work.func=%p\n", floppy_work.func);
1887 if (timer_pending(&fd_timer))
1888 printk("fd_timer.function=%p\n", fd_timer.function);
1889 if (timer_pending(&fd_timeout)) {
1890 printk("timer_function=%p\n", fd_timeout.function);
1891 printk("expires=%lu\n", fd_timeout.expires - jiffies);
1892 printk("now=%lu\n", jiffies);
1894 printk("cont=%p\n", cont);
1895 printk("current_req=%p\n", current_req);
1896 printk("command_status=%d\n", command_status);
1900 static void floppy_shutdown(unsigned long data)
1902 unsigned long flags;
1908 floppy_enable_hlt();
1910 flags = claim_dma_lock();
1912 release_dma_lock(flags);
1914 /* avoid dma going to a random drive after shutdown */
1917 DPRINT("floppy timeout called\n");
1921 cont->redo(); /* this will recall reset when needed */
1923 printk("no cont in shutdown!\n");
1924 process_fd_request();
1926 is_alive("floppy shutdown");
1929 /* start motor, check media-changed condition and write protection */
1930 static int start_motor(void (*function)(void))
1936 data = UNIT(current_drive);
1937 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) {
1938 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) {
1940 /* no read since this drive is running */
1941 DRS->first_read_date = 0;
1942 /* note motor start time if motor is not yet running */
1943 DRS->spinup_date = jiffies;
1944 data |= (0x10 << UNIT(current_drive));
1946 } else if (FDCS->dor & (0x10 << UNIT(current_drive)))
1947 mask &= ~(0x10 << UNIT(current_drive));
1949 /* starts motor and selects floppy */
1950 del_timer(motor_off_timer + current_drive);
1951 set_dor(fdc, mask, data);
1953 /* wait_for_completion also schedules reset if needed. */
1954 return (fd_wait_for_completion(DRS->select_date + DP->select_delay,
1955 (timeout_fn) function));
1958 static void floppy_ready(void)
1961 if (start_motor(floppy_ready))
1967 if (DP->flags & FD_DEBUG) {
1968 DPRINT("calling disk change from floppy_ready\n");
1971 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
1972 disk_change(current_drive) && !DP->select_delay)
1973 twaddle(); /* this clears the dcl on certain drive/controller
1976 #ifdef fd_chose_dma_mode
1977 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) {
1978 unsigned long flags = claim_dma_lock();
1979 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length);
1980 release_dma_lock(flags);
1984 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) {
1985 perpendicular_mode();
1986 fdc_specify(); /* must be done here because of hut, hlt ... */
1989 if ((raw_cmd->flags & FD_RAW_READ) ||
1990 (raw_cmd->flags & FD_RAW_WRITE))
1996 static void floppy_start(void)
1998 reschedule_timeout(current_reqD, "floppy start", 0);
2002 if (DP->flags & FD_DEBUG) {
2003 DPRINT("setting NEWCHANGE in floppy_start\n");
2006 SETF(FD_DISK_NEWCHANGE);
2011 * ========================================================================
2012 * here ends the bottom half. Exported routines are:
2013 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
2014 * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
2015 * Initialization also uses output_byte, result, set_dor, floppy_interrupt
2017 * ========================================================================
2020 * General purpose continuations.
2021 * ==============================
2024 static void do_wakeup(void)
2026 reschedule_timeout(MAXTIMEOUT, "do wakeup", 0);
2028 command_status += 2;
2029 wake_up(&command_done);
2032 static struct cont_t wakeup_cont = {
2036 .done = (done_f)empty
2039 static struct cont_t intr_cont = {
2041 .redo = process_fd_request,
2043 .done = (done_f)empty
2046 static int wait_til_done(void (*handler)(void), int interruptible)
2050 schedule_bh(handler);
2052 if (command_status < 2 && NO_SIGNAL) {
2053 DECLARE_WAITQUEUE(wait, current);
2055 add_wait_queue(&command_done, &wait);
2057 set_current_state(interruptible ?
2058 TASK_INTERRUPTIBLE :
2059 TASK_UNINTERRUPTIBLE);
2061 if (command_status >= 2 || !NO_SIGNAL)
2064 is_alive("wait_til_done");
2068 set_current_state(TASK_RUNNING);
2069 remove_wait_queue(&command_done, &wait);
2072 if (command_status < 2) {
2080 command_status = FD_COMMAND_ERROR;
2081 if (command_status == FD_COMMAND_OKAY)
2085 command_status = FD_COMMAND_NONE;
2089 static void generic_done(int result)
2091 command_status = result;
2092 cont = &wakeup_cont;
2095 static void generic_success(void)
2100 static void generic_failure(void)
2105 static void success_and_wakeup(void)
2112 * formatting and rw support.
2113 * ==========================
2116 static int next_valid_format(void)
2120 probed_format = DRS->probed_format;
2122 if (probed_format >= 8 || !DP->autodetect[probed_format]) {
2123 DRS->probed_format = 0;
2126 if (floppy_type[DP->autodetect[probed_format]].sect) {
2127 DRS->probed_format = probed_format;
2134 static void bad_flp_intr(void)
2139 DRS->probed_format++;
2140 if (!next_valid_format())
2143 err_count = ++(*errors);
2144 INFBOUND(DRWE->badness, err_count);
2145 if (err_count > DP->max_errors.abort)
2147 if (err_count > DP->max_errors.reset)
2149 else if (err_count > DP->max_errors.recal)
2150 DRS->track = NEED_2_RECAL;
2153 static void set_floppy(int drive)
2155 int type = ITYPE(UDRS->fd_device);
2158 _floppy = floppy_type + type;
2160 _floppy = current_type[drive];
2164 * formatting support.
2165 * ===================
2167 static void format_interrupt(void)
2169 switch (interpret_errors()) {
2180 #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2)
2181 #define FM_MODE(x,y) ((y) & ~(((x)->rate & 0x80) >>1))
2182 #define CT(x) ((x) | 0xc0)
2183 static void setup_format_params(int track)
2191 unsigned char track, head, sect, size;
2192 } *here = (struct fparm *)floppy_track_buffer;
2194 raw_cmd = &default_raw_cmd;
2195 raw_cmd->track = track;
2197 raw_cmd->flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
2198 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK;
2199 raw_cmd->rate = _floppy->rate & 0x43;
2200 raw_cmd->cmd_count = NR_F;
2201 COMMAND = FM_MODE(_floppy, FD_FORMAT);
2202 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head);
2203 F_SIZECODE = FD_SIZECODE(_floppy);
2204 F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE;
2205 F_GAP = _floppy->fmt_gap;
2206 F_FILL = FD_FILL_BYTE;
2208 raw_cmd->kernel_data = floppy_track_buffer;
2209 raw_cmd->length = 4 * F_SECT_PER_TRACK;
2211 /* allow for about 30ms for data transport per track */
2212 head_shift = (F_SECT_PER_TRACK + 5) / 6;
2214 /* a ``cylinder'' is two tracks plus a little stepping time */
2215 track_shift = 2 * head_shift + 3;
2217 /* position of logical sector 1 on this track */
2218 n = (track_shift * format_req.track + head_shift * format_req.head)
2221 /* determine interleave */
2223 if (_floppy->fmt_gap < 0x22)
2226 /* initialize field */
2227 for (count = 0; count < F_SECT_PER_TRACK; ++count) {
2228 here[count].track = format_req.track;
2229 here[count].head = format_req.head;
2230 here[count].sect = 0;
2231 here[count].size = F_SIZECODE;
2233 /* place logical sectors */
2234 for (count = 1; count <= F_SECT_PER_TRACK; ++count) {
2235 here[n].sect = count;
2236 n = (n + il) % F_SECT_PER_TRACK;
2237 if (here[n].sect) { /* sector busy, find next free sector */
2239 if (n >= F_SECT_PER_TRACK) {
2240 n -= F_SECT_PER_TRACK;
2241 while (here[n].sect)
2246 if (_floppy->stretch & FD_SECTBASEMASK) {
2247 for (count = 0; count < F_SECT_PER_TRACK; count++)
2248 here[count].sect += FD_SECTBASE(_floppy) - 1;
2252 static void redo_format(void)
2255 setup_format_params(format_req.track << STRETCH(_floppy));
2257 debugt("queue format request");
2260 static struct cont_t format_cont = {
2261 .interrupt = format_interrupt,
2262 .redo = redo_format,
2263 .error = bad_flp_intr,
2264 .done = generic_done
2267 static int do_format(int drive, struct format_descr *tmp_format_req)
2274 _floppy->track > DP->tracks ||
2275 tmp_format_req->track >= _floppy->track ||
2276 tmp_format_req->head >= _floppy->head ||
2277 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
2278 !_floppy->fmt_gap) {
2279 process_fd_request();
2282 format_req = *tmp_format_req;
2284 cont = &format_cont;
2285 errors = &format_errors;
2287 process_fd_request();
2292 * Buffer read/write and support
2293 * =============================
2296 static void floppy_end_request(struct request *req, int error)
2298 unsigned int nr_sectors = current_count_sectors;
2299 unsigned int drive = (unsigned long)req->rq_disk->private_data;
2301 /* current_count_sectors can be zero if transfer failed */
2303 nr_sectors = req->current_nr_sectors;
2304 if (__blk_end_request(req, error, nr_sectors << 9))
2307 /* We're done with the request */
2312 /* new request_done. Can handle physical sectors which are smaller than a
2314 static void request_done(int uptodate)
2316 struct request_queue *q = floppy_queue;
2317 struct request *req = current_req;
2318 unsigned long flags;
2322 reschedule_timeout(MAXTIMEOUT, "request done %d", uptodate);
2325 printk("floppy.c: no request in request_done\n");
2330 /* maintain values for invalidation on geometry
2332 block = current_count_sectors + req->sector;
2333 INFBOUND(DRS->maxblock, block);
2334 if (block > _floppy->sect)
2337 /* unlock chained buffers */
2338 spin_lock_irqsave(q->queue_lock, flags);
2339 floppy_end_request(req, 0);
2340 spin_unlock_irqrestore(q->queue_lock, flags);
2342 if (rq_data_dir(req) == WRITE) {
2343 /* record write error information */
2344 DRWE->write_errors++;
2345 if (DRWE->write_errors == 1) {
2346 DRWE->first_error_sector = req->sector;
2347 DRWE->first_error_generation = DRS->generation;
2349 DRWE->last_error_sector = req->sector;
2350 DRWE->last_error_generation = DRS->generation;
2352 spin_lock_irqsave(q->queue_lock, flags);
2353 floppy_end_request(req, -EIO);
2354 spin_unlock_irqrestore(q->queue_lock, flags);
2358 /* Interrupt handler evaluating the result of the r/w operation */
2359 static void rw_interrupt(void)
2367 /* some Toshiba floppy controllers occasionnally seem to
2368 * return bogus interrupts after read/write operations, which
2369 * can be recognized by a bad head number (>= 2) */
2373 if (!DRS->first_read_date)
2374 DRS->first_read_date = jiffies;
2389 nr_sectors = (((R_TRACK - TRACK) * heads +
2390 R_HEAD - HEAD) * SECT_PER_TRACK +
2391 R_SECTOR - SECTOR + eoc) << SIZECODE >> 2;
2393 #ifdef FLOPPY_SANITY_CHECK
2394 if (nr_sectors / ssize >
2395 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) {
2396 DPRINT("long rw: %x instead of %lx\n",
2397 nr_sectors, current_count_sectors);
2398 printk("rs=%d s=%d\n", R_SECTOR, SECTOR);
2399 printk("rh=%d h=%d\n", R_HEAD, HEAD);
2400 printk("rt=%d t=%d\n", R_TRACK, TRACK);
2401 printk("heads=%d eoc=%d\n", heads, eoc);
2402 printk("spt=%d st=%d ss=%d\n", SECT_PER_TRACK,
2404 printk("in_sector_offset=%d\n", in_sector_offset);
2408 nr_sectors -= in_sector_offset;
2409 INFBOUND(nr_sectors, 0);
2410 SUPBOUND(current_count_sectors, nr_sectors);
2412 switch (interpret_errors()) {
2417 if (!current_count_sectors) {
2424 if (!current_count_sectors) {
2428 current_type[current_drive] = _floppy;
2429 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2434 if (DP->flags & FTD_MSG)
2435 DPRINT("Auto-detected floppy type %s in fd%d\n",
2436 _floppy->name, current_drive);
2437 current_type[current_drive] = _floppy;
2438 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2442 if (CT(COMMAND) != FD_READ ||
2443 raw_cmd->kernel_data == current_req->buffer) {
2444 /* transfer directly from buffer */
2446 } else if (CT(COMMAND) == FD_READ) {
2447 buffer_track = raw_cmd->track;
2448 buffer_drive = current_drive;
2449 INFBOUND(buffer_max, nr_sectors + fsector_t);
2454 /* Compute maximal contiguous buffer size. */
2455 static int buffer_chain_size(void)
2459 struct req_iterator iter;
2462 base = bio_data(current_req->bio);
2465 rq_for_each_segment(bv, current_req, iter) {
2466 if (page_address(bv->bv_page) + bv->bv_offset != base + size)
2475 /* Compute the maximal transfer size */
2476 static int transfer_size(int ssize, int max_sector, int max_size)
2478 SUPBOUND(max_sector, fsector_t + max_size);
2481 max_sector -= (max_sector % _floppy->sect) % ssize;
2483 /* transfer size, beginning not aligned */
2484 current_count_sectors = max_sector - fsector_t;
2490 * Move data from/to the track buffer to/from the buffer cache.
2492 static void copy_buffer(int ssize, int max_sector, int max_sector_2)
2494 int remaining; /* number of transferred 512-byte sectors */
2499 struct req_iterator iter;
2501 max_sector = transfer_size(ssize,
2502 min(max_sector, max_sector_2),
2503 current_req->nr_sectors);
2505 if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
2506 buffer_max > fsector_t + current_req->nr_sectors)
2507 current_count_sectors = min_t(int, buffer_max - fsector_t,
2508 current_req->nr_sectors);
2510 remaining = current_count_sectors << 9;
2511 #ifdef FLOPPY_SANITY_CHECK
2512 if ((remaining >> 9) > current_req->nr_sectors &&
2513 CT(COMMAND) == FD_WRITE) {
2514 DPRINT("in copy buffer\n");
2515 printk("current_count_sectors=%ld\n", current_count_sectors);
2516 printk("remaining=%d\n", remaining >> 9);
2517 printk("current_req->nr_sectors=%ld\n",
2518 current_req->nr_sectors);
2519 printk("current_req->current_nr_sectors=%u\n",
2520 current_req->current_nr_sectors);
2521 printk("max_sector=%d\n", max_sector);
2522 printk("ssize=%d\n", ssize);
2526 buffer_max = max(max_sector, buffer_max);
2528 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
2530 size = current_req->current_nr_sectors << 9;
2532 rq_for_each_segment(bv, current_req, iter) {
2537 SUPBOUND(size, remaining);
2539 buffer = page_address(bv->bv_page) + bv->bv_offset;
2540 #ifdef FLOPPY_SANITY_CHECK
2541 if (dma_buffer + size >
2542 floppy_track_buffer + (max_buffer_sectors << 10) ||
2543 dma_buffer < floppy_track_buffer) {
2544 DPRINT("buffer overrun in copy buffer %d\n",
2545 (int)((floppy_track_buffer -
2547 printk("fsector_t=%d buffer_min=%d\n",
2548 fsector_t, buffer_min);
2549 printk("current_count_sectors=%ld\n",
2550 current_count_sectors);
2551 if (CT(COMMAND) == FD_READ)
2553 if (CT(COMMAND) == FD_WRITE)
2557 if (((unsigned long)buffer) % 512)
2558 DPRINT("%p buffer not aligned\n", buffer);
2560 if (CT(COMMAND) == FD_READ)
2561 memcpy(buffer, dma_buffer, size);
2563 memcpy(dma_buffer, buffer, size);
2568 #ifdef FLOPPY_SANITY_CHECK
2571 max_sector -= remaining >> 9;
2572 DPRINT("weirdness: remaining %d\n", remaining >> 9);
2577 /* work around a bug in pseudo DMA
2578 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2579 * sending data. Hence we need a different way to signal the
2580 * transfer length: We use SECT_PER_TRACK. Unfortunately, this
2581 * does not work with MT, hence we can only transfer one head at
2584 static void virtualdmabug_workaround(void)
2589 if (CT(COMMAND) == FD_WRITE) {
2590 COMMAND &= ~0x80; /* switch off multiple track mode */
2592 hard_sectors = raw_cmd->length >> (7 + SIZECODE);
2593 end_sector = SECTOR + hard_sectors - 1;
2594 #ifdef FLOPPY_SANITY_CHECK
2595 if (end_sector > SECT_PER_TRACK) {
2596 printk("too many sectors %d > %d\n",
2597 end_sector, SECT_PER_TRACK);
2601 SECT_PER_TRACK = end_sector; /* make sure SECT_PER_TRACK points
2602 * to end of transfer */
2607 * Formulate a read/write request.
2608 * this routine decides where to load the data (directly to buffer, or to
2609 * tmp floppy area), how much data to load (the size of the buffer, the whole
2610 * track, or a single sector)
2611 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2612 * allocation on the fly, it should be done here. No other part should need
2616 static int make_raw_rw_request(void)
2618 int aligned_sector_t;
2624 if (max_buffer_sectors == 0) {
2625 printk("VFS: Block I/O scheduled on unopened device\n");
2629 set_fdc((long)current_req->rq_disk->private_data);
2631 raw_cmd = &default_raw_cmd;
2632 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK |
2634 raw_cmd->cmd_count = NR_RW;
2635 if (rq_data_dir(current_req) == READ) {
2636 raw_cmd->flags |= FD_RAW_READ;
2637 COMMAND = FM_MODE(_floppy, FD_READ);
2638 } else if (rq_data_dir(current_req) == WRITE) {
2639 raw_cmd->flags |= FD_RAW_WRITE;
2640 COMMAND = FM_MODE(_floppy, FD_WRITE);
2642 DPRINT("make_raw_rw_request: unknown command\n");
2646 max_sector = _floppy->sect * _floppy->head;
2648 TRACK = (int)current_req->sector / max_sector;
2649 fsector_t = (int)current_req->sector % max_sector;
2650 if (_floppy->track && TRACK >= _floppy->track) {
2651 if (current_req->current_nr_sectors & 1) {
2652 current_count_sectors = 1;
2657 HEAD = fsector_t / _floppy->sect;
2659 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) ||
2660 TESTF(FD_NEED_TWADDLE)) && fsector_t < _floppy->sect)
2661 max_sector = _floppy->sect;
2663 /* 2M disks have phantom sectors on the first track */
2664 if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) {
2665 max_sector = 2 * _floppy->sect / 3;
2666 if (fsector_t >= max_sector) {
2667 current_count_sectors =
2668 min_t(int, _floppy->sect - fsector_t,
2669 current_req->nr_sectors);
2674 SIZECODE = FD_SIZECODE(_floppy);
2675 raw_cmd->rate = _floppy->rate & 0x43;
2676 if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2)
2683 raw_cmd->track = TRACK << STRETCH(_floppy);
2684 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD);
2687 SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
2688 SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) +
2689 FD_SECTBASE(_floppy);
2691 /* tracksize describes the size which can be filled up with sectors
2694 tracksize = _floppy->sect - _floppy->sect % ssize;
2695 if (tracksize < _floppy->sect) {
2697 if (tracksize <= fsector_t % _floppy->sect)
2700 /* if we are beyond tracksize, fill up using smaller sectors */
2701 while (tracksize <= fsector_t % _floppy->sect) {
2702 while (tracksize + ssize > _floppy->sect) {
2710 max_sector = HEAD * _floppy->sect + tracksize;
2711 } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) {
2712 max_sector = _floppy->sect;
2713 } else if (!HEAD && CT(COMMAND) == FD_WRITE) {
2714 /* for virtual DMA bug workaround */
2715 max_sector = _floppy->sect;
2718 in_sector_offset = (fsector_t % _floppy->sect) % ssize;
2719 aligned_sector_t = fsector_t - in_sector_offset;
2720 max_size = current_req->nr_sectors;
2721 if ((raw_cmd->track == buffer_track) &&
2722 (current_drive == buffer_drive) &&
2723 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
2724 /* data already in track buffer */
2725 if (CT(COMMAND) == FD_READ) {
2726 copy_buffer(1, max_sector, buffer_max);
2729 } else if (in_sector_offset || current_req->nr_sectors < ssize) {
2730 if (CT(COMMAND) == FD_WRITE) {
2731 if (fsector_t + current_req->nr_sectors > ssize &&
2732 fsector_t + current_req->nr_sectors < ssize + ssize)
2733 max_size = ssize + ssize;
2737 raw_cmd->flags &= ~FD_RAW_WRITE;
2738 raw_cmd->flags |= FD_RAW_READ;
2739 COMMAND = FM_MODE(_floppy, FD_READ);
2740 } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) {
2741 unsigned long dma_limit;
2742 int direct, indirect;
2745 transfer_size(ssize, max_sector,
2746 max_buffer_sectors * 2) - fsector_t;
2749 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2750 * on a 64 bit machine!
2752 max_size = buffer_chain_size();
2755 ((unsigned long)current_req->buffer)) >> 9;
2756 if ((unsigned long)max_size > dma_limit) {
2757 max_size = dma_limit;
2759 /* 64 kb boundaries */
2760 if (CROSS_64KB(current_req->buffer, max_size << 9))
2762 ((unsigned long)current_req->buffer) %
2764 direct = transfer_size(ssize, max_sector, max_size) - fsector_t;
2766 * We try to read tracks, but if we get too many errors, we
2767 * go back to reading just one sector at a time.
2769 * This means we should be able to read a sector even if there
2770 * are other bad sectors on this track.
2773 (indirect * 2 > direct * 3 &&
2774 *errors < DP->max_errors.read_track && ((!probing
2775 || (DP->read_track & (1 << DRS->probed_format)))))) {
2776 max_size = current_req->nr_sectors;
2778 raw_cmd->kernel_data = current_req->buffer;
2779 raw_cmd->length = current_count_sectors << 9;
2780 if (raw_cmd->length == 0) {
2782 ("zero dma transfer attempted from make_raw_request\n");
2783 DPRINT("indirect=%d direct=%d fsector_t=%d",
2784 indirect, direct, fsector_t);
2787 virtualdmabug_workaround();
2792 if (CT(COMMAND) == FD_READ)
2793 max_size = max_sector; /* unbounded */
2795 /* claim buffer track if needed */
2796 if (buffer_track != raw_cmd->track || /* bad track */
2797 buffer_drive != current_drive || /* bad drive */
2798 fsector_t > buffer_max ||
2799 fsector_t < buffer_min ||
2800 ((CT(COMMAND) == FD_READ ||
2801 (!in_sector_offset && current_req->nr_sectors >= ssize)) &&
2802 max_sector > 2 * max_buffer_sectors + buffer_min &&
2803 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)
2804 /* not enough space */
2807 buffer_drive = current_drive;
2808 buffer_max = buffer_min = aligned_sector_t;
2810 raw_cmd->kernel_data = floppy_track_buffer +
2811 ((aligned_sector_t - buffer_min) << 9);
2813 if (CT(COMMAND) == FD_WRITE) {
2814 /* copy write buffer to track buffer.
2815 * if we get here, we know that the write
2816 * is either aligned or the data already in the buffer
2817 * (buffer will be overwritten) */
2818 #ifdef FLOPPY_SANITY_CHECK
2819 if (in_sector_offset && buffer_track == -1)
2820 DPRINT("internal error offset !=0 on write\n");
2822 buffer_track = raw_cmd->track;
2823 buffer_drive = current_drive;
2824 copy_buffer(ssize, max_sector,
2825 2 * max_buffer_sectors + buffer_min);
2827 transfer_size(ssize, max_sector,
2828 2 * max_buffer_sectors + buffer_min -
2831 /* round up current_count_sectors to get dma xfer size */
2832 raw_cmd->length = in_sector_offset + current_count_sectors;
2833 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1;
2834 raw_cmd->length <<= 9;
2835 #ifdef FLOPPY_SANITY_CHECK
2836 if ((raw_cmd->length < current_count_sectors << 9) ||
2837 (raw_cmd->kernel_data != current_req->buffer &&
2838 CT(COMMAND) == FD_WRITE &&
2839 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
2840 aligned_sector_t < buffer_min)) ||
2841 raw_cmd->length % (128 << SIZECODE) ||
2842 raw_cmd->length <= 0 || current_count_sectors <= 0) {
2843 DPRINT("fractionary current count b=%lx s=%lx\n",
2844 raw_cmd->length, current_count_sectors);
2845 if (raw_cmd->kernel_data != current_req->buffer)
2846 printk("addr=%d, length=%ld\n",
2847 (int)((raw_cmd->kernel_data -
2848 floppy_track_buffer) >> 9),
2849 current_count_sectors);
2850 printk("st=%d ast=%d mse=%d msi=%d\n",
2851 fsector_t, aligned_sector_t, max_sector, max_size);
2852 printk("ssize=%x SIZECODE=%d\n", ssize, SIZECODE);
2853 printk("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2854 COMMAND, SECTOR, HEAD, TRACK);
2855 printk("buffer drive=%d\n", buffer_drive);
2856 printk("buffer track=%d\n", buffer_track);
2857 printk("buffer_min=%d\n", buffer_min);
2858 printk("buffer_max=%d\n", buffer_max);
2862 if (raw_cmd->kernel_data != current_req->buffer) {
2863 if (raw_cmd->kernel_data < floppy_track_buffer ||
2864 current_count_sectors < 0 ||
2865 raw_cmd->length < 0 ||
2866 raw_cmd->kernel_data + raw_cmd->length >
2867 floppy_track_buffer + (max_buffer_sectors << 10)) {
2868 DPRINT("buffer overrun in schedule dma\n");
2869 printk("fsector_t=%d buffer_min=%d current_count=%ld\n",
2870 fsector_t, buffer_min, raw_cmd->length >> 9);
2871 printk("current_count_sectors=%ld\n",
2872 current_count_sectors);
2873 if (CT(COMMAND) == FD_READ)
2875 if (CT(COMMAND) == FD_WRITE)
2879 } else if (raw_cmd->length > current_req->nr_sectors << 9 ||
2880 current_count_sectors > current_req->nr_sectors) {
2881 DPRINT("buffer overrun in direct transfer\n");
2883 } else if (raw_cmd->length < current_count_sectors << 9) {
2884 DPRINT("more sectors than bytes\n");
2885 printk("bytes=%ld\n", raw_cmd->length >> 9);
2886 printk("sectors=%ld\n", current_count_sectors);
2888 if (raw_cmd->length == 0) {
2889 DPRINT("zero dma transfer attempted from make_raw_request\n");
2894 virtualdmabug_workaround();
2898 static void redo_fd_request(void)
2900 #define REPEAT {request_done(0); continue; }
2905 if (current_drive < N_DRIVE)
2906 floppy_off(current_drive);
2910 struct request *req;
2912 spin_lock_irq(floppy_queue->queue_lock);
2913 req = elv_next_request(floppy_queue);
2914 spin_unlock_irq(floppy_queue->queue_lock);
2922 drive = (long)current_req->rq_disk->private_data;
2924 reschedule_timeout(current_reqD, "redo fd request", 0);
2927 raw_cmd = &default_raw_cmd;
2929 if (start_motor(redo_fd_request))
2931 disk_change(current_drive);
2932 if (test_bit(current_drive, &fake_change) ||
2933 TESTF(FD_DISK_CHANGED)) {
2934 DPRINT("disk absent or changed during operation\n");
2937 if (!_floppy) { /* Autodetection */
2939 DRS->probed_format = 0;
2940 if (next_valid_format()) {
2941 DPRINT("no autodetectable formats\n");
2948 floppy_type + DP->autodetect[DRS->probed_format];
2951 errors = &(current_req->errors);
2952 tmp = make_raw_rw_request();
2958 if (TESTF(FD_NEED_TWADDLE))
2960 schedule_bh(floppy_start);
2961 debugt("queue fd request");
2967 static struct cont_t rw_cont = {
2968 .interrupt = rw_interrupt,
2969 .redo = redo_fd_request,
2970 .error = bad_flp_intr,
2971 .done = request_done
2974 static void process_fd_request(void)
2977 schedule_bh(redo_fd_request);
2980 static void do_fd_request(struct request_queue * q)
2982 if (max_buffer_sectors == 0) {
2983 printk("VFS: do_fd_request called on non-open device\n");
2987 if (usage_count == 0) {
2988 printk("warning: usage count=0, current_req=%p exiting\n",
2990 printk("sect=%ld type=%x flags=%x\n", (long)current_req->sector,
2991 current_req->cmd_type, current_req->cmd_flags);
2994 if (test_bit(0, &fdc_busy)) {
2995 /* fdc busy, this new request will be treated when the
2996 current one is done */
2997 is_alive("do fd request, old request running");
3000 lock_fdc(MAXTIMEOUT, 0);
3001 process_fd_request();
3002 is_alive("do fd request");
3005 static struct cont_t poll_cont = {
3006 .interrupt = success_and_wakeup,
3007 .redo = floppy_ready,
3008 .error = generic_failure,
3009 .done = generic_done
3012 static int poll_drive(int interruptible, int flag)
3016 /* no auto-sense, just clear dcl */
3017 raw_cmd = &default_raw_cmd;
3018 raw_cmd->flags = flag;
3020 raw_cmd->cmd_count = 0;
3023 if (DP->flags & FD_DEBUG) {
3024 DPRINT("setting NEWCHANGE in poll_drive\n");
3027 SETF(FD_DISK_NEWCHANGE);
3033 * User triggered reset
3034 * ====================
3037 static void reset_intr(void)
3039 printk("weird, reset interrupt called\n");
3042 static struct cont_t reset_cont = {
3043 .interrupt = reset_intr,
3044 .redo = success_and_wakeup,
3045 .error = generic_failure,
3046 .done = generic_done
3049 static int user_reset_fdc(int drive, int arg, int interruptible)
3054 LOCK_FDC(drive, interruptible);
3055 if (arg == FD_RESET_ALWAYS)
3061 process_fd_request();
3066 * Misc Ioctl's and support
3067 * ========================
3069 static inline int fd_copyout(void __user *param, const void *address,
3072 return copy_to_user(param, address, size) ? -EFAULT : 0;
3075 static inline int fd_copyin(void __user *param, void *address, unsigned long size)
3077 return copy_from_user(address, param, size) ? -EFAULT : 0;
3080 #define _COPYOUT(x) (copy_to_user((void __user *)param, &(x), sizeof(x)) ? -EFAULT : 0)
3081 #define _COPYIN(x) (copy_from_user(&(x), (void __user *)param, sizeof(x)) ? -EFAULT : 0)
3083 #define COPYOUT(x) ECALL(_COPYOUT(x))
3084 #define COPYIN(x) ECALL(_COPYIN(x))
3086 static inline const char *drive_name(int type, int drive)
3088 struct floppy_struct *floppy;
3091 floppy = floppy_type + type;
3093 if (UDP->native_format)
3094 floppy = floppy_type + UDP->native_format;
3099 return floppy->name;
3105 static void raw_cmd_done(int flag)
3110 raw_cmd->flags |= FD_RAW_FAILURE;
3111 raw_cmd->flags |= FD_RAW_HARDFAILURE;
3113 raw_cmd->reply_count = inr;
3114 if (raw_cmd->reply_count > MAX_REPLIES)
3115 raw_cmd->reply_count = 0;
3116 for (i = 0; i < raw_cmd->reply_count; i++)
3117 raw_cmd->reply[i] = reply_buffer[i];
3119 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3120 unsigned long flags;
3121 flags = claim_dma_lock();
3122 raw_cmd->length = fd_get_dma_residue();
3123 release_dma_lock(flags);
3126 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
3127 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
3128 raw_cmd->flags |= FD_RAW_FAILURE;
3130 if (disk_change(current_drive))
3131 raw_cmd->flags |= FD_RAW_DISK_CHANGE;
3133 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
3134 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
3135 motor_off_callback(current_drive);
3137 if (raw_cmd->next &&
3138 (!(raw_cmd->flags & FD_RAW_FAILURE) ||
3139 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
3140 ((raw_cmd->flags & FD_RAW_FAILURE) ||
3141 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) {
3142 raw_cmd = raw_cmd->next;
3149 static struct cont_t raw_cmd_cont = {
3150 .interrupt = success_and_wakeup,
3151 .redo = floppy_start,
3152 .error = generic_failure,
3153 .done = raw_cmd_done
3156 static inline int raw_cmd_copyout(int cmd, char __user *param,
3157 struct floppy_raw_cmd *ptr)
3163 param += sizeof(struct floppy_raw_cmd);
3164 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) {
3165 if (ptr->length >= 0
3166 && ptr->length <= ptr->buffer_length)
3168 (ptr->data, ptr->kernel_data,
3169 ptr->buffer_length - ptr->length));
3176 static void raw_cmd_free(struct floppy_raw_cmd **ptr)
3178 struct floppy_raw_cmd *next;
3179 struct floppy_raw_cmd *this;
3184 if (this->buffer_length) {
3185 fd_dma_mem_free((unsigned long)this->kernel_data,
3186 this->buffer_length);
3187 this->buffer_length = 0;
3195 static inline int raw_cmd_copyin(int cmd, char __user *param,
3196 struct floppy_raw_cmd **rcmd)
3198 struct floppy_raw_cmd *ptr;
3204 ptr = (struct floppy_raw_cmd *)
3205 kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
3211 ptr->buffer_length = 0;
3212 param += sizeof(struct floppy_raw_cmd);
3213 if (ptr->cmd_count > 33)
3214 /* the command may now also take up the space
3215 * initially intended for the reply & the
3216 * reply count. Needed for long 82078 commands
3217 * such as RESTORE, which takes ... 17 command
3218 * bytes. Murphy's law #137: When you reserve
3219 * 16 bytes for a structure, you'll one day
3220 * discover that you really need 17...
3224 for (i = 0; i < 16; i++)
3226 ptr->resultcode = 0;
3227 ptr->kernel_data = NULL;
3229 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3230 if (ptr->length <= 0)
3233 (char *)fd_dma_mem_alloc(ptr->length);
3234 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
3235 if (!ptr->kernel_data)
3237 ptr->buffer_length = ptr->length;
3239 if (ptr->flags & FD_RAW_WRITE)
3240 ECALL(fd_copyin(ptr->data, ptr->kernel_data,
3242 rcmd = &(ptr->next);
3243 if (!(ptr->flags & FD_RAW_MORE))
3249 static int raw_cmd_ioctl(int cmd, void __user *param)
3251 struct floppy_raw_cmd *my_raw_cmd;
3256 if (FDCS->rawcmd <= 1)
3258 for (drive = 0; drive < N_DRIVE; drive++) {
3259 if (FDC(drive) != fdc)
3261 if (drive == current_drive) {
3262 if (UDRS->fd_ref > 1) {
3266 } else if (UDRS->fd_ref) {
3275 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
3277 raw_cmd_free(&my_raw_cmd);
3281 raw_cmd = my_raw_cmd;
3282 cont = &raw_cmd_cont;
3283 ret = wait_til_done(floppy_start, 1);
3285 if (DP->flags & FD_DEBUG) {
3286 DPRINT("calling disk change from raw_cmd ioctl\n");
3290 if (ret != -EINTR && FDCS->reset)
3293 DRS->track = NO_TRACK;
3295 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
3298 raw_cmd_free(&my_raw_cmd);
3302 static int invalidate_drive(struct block_device *bdev)
3304 /* invalidate the buffer track to force a reread */
3305 set_bit((long)bdev->bd_disk->private_data, &fake_change);
3306 process_fd_request();
3307 check_disk_change(bdev);
3311 static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
3312 int drive, int type, struct block_device *bdev)
3316 /* sanity checking for parameters. */
3319 g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) ||
3320 /* check if reserved bits are set */
3321 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0)
3324 if (!capable(CAP_SYS_ADMIN))
3326 mutex_lock(&open_lock);
3328 floppy_type[type] = *g;
3329 floppy_type[type].name = "user format";
3330 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
3331 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] =
3332 floppy_type[type].size + 1;
3333 process_fd_request();
3334 for (cnt = 0; cnt < N_DRIVE; cnt++) {
3335 struct block_device *bdev = opened_bdev[cnt];
3336 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
3338 __invalidate_device(bdev);
3340 mutex_unlock(&open_lock);
3344 if (cmd != FDDEFPRM)
3345 /* notice a disk change immediately, else
3346 * we lose our settings immediately*/
3347 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3348 oldStretch = g->stretch;
3349 user_params[drive] = *g;
3350 if (buffer_drive == drive)
3351 SUPBOUND(buffer_max, user_params[drive].sect);
3352 current_type[drive] = &user_params[drive];
3353 floppy_sizes[drive] = user_params[drive].size;
3354 if (cmd == FDDEFPRM)
3355 DRS->keep_data = -1;
3358 /* invalidation. Invalidate only when needed, i.e.
3359 * when there are already sectors in the buffer cache
3360 * whose number will change. This is useful, because
3361 * mtools often changes the geometry of the disk after
3362 * looking at the boot block */
3363 if (DRS->maxblock > user_params[drive].sect ||
3365 ((user_params[drive].sect ^ oldStretch) &
3366 (FD_SWAPSIDES | FD_SECTBASEMASK)))
3367 invalidate_drive(bdev);
3369 process_fd_request();
3374 /* handle obsolete ioctl's */
3375 static int ioctl_table[] = {
3403 static inline int normalize_ioctl(int *cmd, int *size)
3407 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) {
3408 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) {
3409 *size = _IOC_SIZE(*cmd);
3410 *cmd = ioctl_table[i];
3411 if (*size > _IOC_SIZE(*cmd)) {
3412 printk("ioctl not yet supported\n");
3421 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
3424 *g = &floppy_type[type];
3427 CALL(poll_drive(0, 0));
3428 process_fd_request();
3429 *g = current_type[drive];
3436 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
3438 int drive = (long)bdev->bd_disk->private_data;
3439 int type = ITYPE(drive_state[drive].fd_device);
3440 struct floppy_struct *g;
3443 ret = get_floppy_geometry(drive, type, &g);
3447 geo->heads = g->head;
3448 geo->sectors = g->sect;
3449 geo->cylinders = g->track;
3453 static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3454 unsigned long param)
3456 #define FD_IOCTL_ALLOWED (mode & (FMODE_WRITE|FMODE_WRITE_IOCTL))
3457 #define OUT(c,x) case c: outparam = (const char *) (x); break
3458 #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0
3460 int drive = (long)bdev->bd_disk->private_data;
3461 int type = ITYPE(UDRS->fd_device);
3466 struct floppy_struct g; /* geometry */
3467 struct format_descr f;
3468 struct floppy_max_errors max_errors;
3469 struct floppy_drive_params dp;
3470 } inparam; /* parameters coming from user space */
3471 const char *outparam; /* parameters passed back to user space */
3473 /* convert compatibility eject ioctls into floppy eject ioctl.
3474 * We do this in order to provide a means to eject floppy disks before
3475 * installing the new fdutils package */
3476 if (cmd == CDROMEJECT || /* CD-ROM eject */
3477 cmd == 0x6470 /* SunOS floppy eject */ ) {
3478 DPRINT("obsolete eject ioctl\n");
3479 DPRINT("please use floppycontrol --eject\n");
3483 /* convert the old style command into a new style command */
3484 if ((cmd & 0xff00) == 0x0200) {
3485 ECALL(normalize_ioctl(&cmd, &size));
3489 /* permission checks */
3490 if (((cmd & 0x40) && !FD_IOCTL_ALLOWED) ||
3491 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
3495 CLEARSTRUCT(&inparam);
3496 if (_IOC_DIR(cmd) & _IOC_WRITE)
3497 ECALL(fd_copyin((void __user *)param, &inparam, size))
3501 if (UDRS->fd_ref != 1)
3502 /* somebody else has this drive open */
3506 /* do the actual eject. Fails on
3507 * non-Sparc architectures */
3508 ret = fd_eject(UNIT(drive));
3510 USETF(FD_DISK_CHANGED);
3512 process_fd_request();
3516 current_type[drive] = NULL;
3517 floppy_sizes[drive] = MAX_DISK_SIZE << 1;
3518 UDRS->keep_data = 0;
3519 return invalidate_drive(bdev);
3522 return set_geometry(cmd, &inparam.g,
3525 ECALL(get_floppy_geometry(drive, type,
3526 (struct floppy_struct **)
3531 UDP->flags |= FTD_MSG;
3534 UDP->flags &= ~FTD_MSG;
3539 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3541 process_fd_request();
3542 if (ret & FD_VERIFY)
3544 if (!(ret & FD_DISK_WRITABLE))
3548 if (UDRS->fd_ref != 1)
3550 return do_format(drive, &inparam.f);
3554 return invalidate_drive(bdev);
3556 case FDSETEMSGTRESH:
3557 UDP->max_errors.reporting =
3558 (unsigned short)(param & 0x0f);
3560 OUT(FDGETMAXERRS, &UDP->max_errors);
3561 IN(FDSETMAXERRS, &UDP->max_errors, max_errors);
3564 outparam = drive_name(type, drive);
3565 SUPBOUND(size, strlen(outparam) + 1);
3568 IN(FDSETDRVPRM, UDP, dp);
3569 OUT(FDGETDRVPRM, UDP);
3573 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3574 process_fd_request();
3576 OUT(FDGETDRVSTAT, UDRS);
3579 return user_reset_fdc(drive, (int)param, 1);
3581 OUT(FDGETFDCSTAT, UFDCS);
3586 OUT(FDWERRORGET, UDRWE);
3593 CALL(i = raw_cmd_ioctl(cmd, (void __user *)param));
3594 process_fd_request();
3600 process_fd_request();
3607 if (_IOC_DIR(cmd) & _IOC_READ)
3608 return fd_copyout((void __user *)param, outparam, size);
3615 static void __init config_types(void)
3620 /* read drive info out of physical CMOS */
3623 UDP->cmos = FLOPPY0_TYPE;
3625 if (!UDP->cmos && FLOPPY1_TYPE)
3626 UDP->cmos = FLOPPY1_TYPE;
3628 /* FIXME: additional physical CMOS drive detection should go here */
3630 for (drive = 0; drive < N_DRIVE; drive++) {
3631 unsigned int type = UDP->cmos;
3632 struct floppy_drive_params *params;
3633 const char *name = NULL;
3634 static char temparea[32];
3636 if (type < ARRAY_SIZE(default_drive_params)) {
3637 params = &default_drive_params[type].params;
3639 name = default_drive_params[type].name;
3640 allowed_drive_mask |= 1 << drive;
3642 allowed_drive_mask &= ~(1 << drive);
3644 params = &default_drive_params[0].params;
3645 sprintf(temparea, "unknown type %d (usb?)", type);
3649 const char *prepend = ",";
3651 prepend = KERN_INFO "Floppy drive(s):";
3654 printk("%s fd%d is %s", prepend, drive, name);
3662 static int floppy_release(struct gendisk *disk, fmode_t mode)
3664 int drive = (long)disk->private_data;
3666 mutex_lock(&open_lock);
3667 if (UDRS->fd_ref < 0)
3669 else if (!UDRS->fd_ref--) {
3670 DPRINT("floppy_release with fd_ref == 0");
3674 opened_bdev[drive] = NULL;
3675 mutex_unlock(&open_lock);
3681 * floppy_open check for aliasing (/dev/fd0 can be the same as
3682 * /dev/PS0 etc), and disallows simultaneous access to the same
3683 * drive with different device numbers.
3685 static int floppy_open(struct block_device *bdev, fmode_t mode)
3687 int drive = (long)bdev->bd_disk->private_data;
3688 int old_dev, new_dev;
3693 mutex_lock(&open_lock);
3694 old_dev = UDRS->fd_device;
3695 if (opened_bdev[drive] && opened_bdev[drive] != bdev)
3698 if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) {
3699 USETF(FD_DISK_CHANGED);
3703 if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL)))
3706 if (mode & FMODE_EXCL)
3711 opened_bdev[drive] = bdev;
3715 if (!floppy_track_buffer) {
3716 /* if opening an ED drive, reserve a big buffer,
3717 * else reserve a small one */
3718 if ((UDP->cmos == 6) || (UDP->cmos == 5))
3719 try = 64; /* Only 48 actually useful */
3721 try = 32; /* Only 24 actually useful */
3723 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3724 if (!tmp && !floppy_track_buffer) {
3725 try >>= 1; /* buffer only one side */
3727 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3729 if (!tmp && !floppy_track_buffer) {
3730 fallback_on_nodma_alloc(&tmp, 2048 * try);
3732 if (!tmp && !floppy_track_buffer) {
3733 DPRINT("Unable to allocate DMA memory\n");
3736 if (floppy_track_buffer) {
3738 fd_dma_mem_free((unsigned long)tmp, try * 1024);
3740 buffer_min = buffer_max = -1;
3741 floppy_track_buffer = tmp;
3742 max_buffer_sectors = try;
3746 new_dev = MINOR(bdev->bd_dev);
3747 UDRS->fd_device = new_dev;
3748 set_capacity(disks[drive], floppy_sizes[new_dev]);
3749 if (old_dev != -1 && old_dev != new_dev) {
3750 if (buffer_drive == drive)
3754 if (UFDCS->rawcmd == 1)
3757 if (!(mode & FMODE_NDELAY)) {
3758 if (mode & (FMODE_READ|FMODE_WRITE)) {
3759 UDRS->last_checked = 0;
3760 check_disk_change(bdev);
3761 if (UTESTF(FD_DISK_CHANGED))
3765 if ((mode & FMODE_WRITE) && !(UTESTF(FD_DISK_WRITABLE)))
3768 mutex_unlock(&open_lock);
3771 if (UDRS->fd_ref < 0)
3776 opened_bdev[drive] = NULL;
3778 mutex_unlock(&open_lock);
3783 * Check if the disk has been changed or if a change has been faked.
3785 static int check_floppy_change(struct gendisk *disk)
3787 int drive = (long)disk->private_data;
3789 if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY))
3792 if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) {
3795 process_fd_request();
3798 if (UTESTF(FD_DISK_CHANGED) ||
3799 UTESTF(FD_VERIFY) ||
3800 test_bit(drive, &fake_change) ||
3801 (!ITYPE(UDRS->fd_device) && !current_type[drive]))
3807 * This implements "read block 0" for floppy_revalidate().
3808 * Needed for format autodetection, checking whether there is
3809 * a disk in the drive, and whether that disk is writable.
3812 static void floppy_rb0_complete(struct bio *bio,
3815 complete((struct completion *)bio->bi_private);
3818 static int __floppy_read_block_0(struct block_device *bdev)
3821 struct bio_vec bio_vec;
3822 struct completion complete;
3826 page = alloc_page(GFP_NOIO);
3828 process_fd_request();
3832 size = bdev->bd_block_size;
3837 bio.bi_io_vec = &bio_vec;
3838 bio_vec.bv_page = page;
3839 bio_vec.bv_len = size;
3840 bio_vec.bv_offset = 0;
3846 init_completion(&complete);
3847 bio.bi_private = &complete;
3848 bio.bi_end_io = floppy_rb0_complete;
3850 submit_bio(READ, &bio);
3851 generic_unplug_device(bdev_get_queue(bdev));
3852 process_fd_request();
3853 wait_for_completion(&complete);
3860 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
3861 * the bootblock (block 0). "Autodetection" is also needed to check whether
3862 * there is a disk in the drive at all... Thus we also do it for fixed
3863 * geometry formats */
3864 static int floppy_revalidate(struct gendisk *disk)
3866 int drive = (long)disk->private_data;
3867 #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device))
3871 if (UTESTF(FD_DISK_CHANGED) ||
3872 UTESTF(FD_VERIFY) || test_bit(drive, &fake_change) || NO_GEOM) {
3873 if (usage_count == 0) {
3874 printk("VFS: revalidate called on non-open device.\n");
3878 cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY);
3879 if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)) {
3880 process_fd_request(); /*already done by another thread */
3885 if (buffer_drive == drive)
3887 clear_bit(drive, &fake_change);
3888 UCLEARF(FD_DISK_CHANGED);
3893 res = __floppy_read_block_0(opened_bdev[drive]);
3896 poll_drive(0, FD_RAW_NEED_DISK);
3897 process_fd_request();
3900 set_capacity(disk, floppy_sizes[UDRS->fd_device]);
3904 static struct block_device_operations floppy_fops = {
3905 .owner = THIS_MODULE,
3906 .open = floppy_open,
3907 .release = floppy_release,
3908 .locked_ioctl = fd_ioctl,
3909 .getgeo = fd_getgeo,
3910 .media_changed = check_floppy_change,
3911 .revalidate_disk = floppy_revalidate,
3915 * Floppy Driver initialization
3916 * =============================
3919 /* Determine the floppy disk controller type */
3920 /* This routine was written by David C. Niemi */
3921 static char __init get_fdc_version(void)
3925 output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */
3928 if ((r = result()) <= 0x00)
3929 return FDC_NONE; /* No FDC present ??? */
3930 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3931 printk(KERN_INFO "FDC %d is an 8272A\n", fdc);
3932 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
3936 ("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
3941 if (!fdc_configure()) {
3942 printk(KERN_INFO "FDC %d is an 82072\n", fdc);
3943 return FDC_82072; /* 82072 doesn't know CONFIGURE */
3946 output_byte(FD_PERPENDICULAR);
3947 if (need_more_output() == MORE_OUTPUT) {
3950 printk(KERN_INFO "FDC %d is an 82072A\n", fdc);
3951 return FDC_82072A; /* 82072A as found on Sparcs. */
3954 output_byte(FD_UNLOCK);
3956 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3957 printk(KERN_INFO "FDC %d is a pre-1991 82077\n", fdc);
3958 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
3961 if ((r != 1) || (reply_buffer[0] != 0x00)) {
3962 printk("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
3966 output_byte(FD_PARTID);
3969 printk("FDC %d init: PARTID: unexpected return of %d bytes.\n",
3973 if (reply_buffer[0] == 0x80) {
3974 printk(KERN_INFO "FDC %d is a post-1991 82077\n", fdc);
3975 return FDC_82077; /* Revised 82077AA passes all the tests */
3977 switch (reply_buffer[0] >> 5) {
3979 /* Either a 82078-1 or a 82078SL running at 5Volt */
3980 printk(KERN_INFO "FDC %d is an 82078.\n", fdc);
3983 printk(KERN_INFO "FDC %d is a 44pin 82078\n", fdc);
3986 printk(KERN_INFO "FDC %d is a S82078B\n", fdc);
3989 printk(KERN_INFO "FDC %d is a National Semiconductor PC87306\n",
3994 "FDC %d init: 82078 variant with unknown PARTID=%d.\n",
3995 fdc, reply_buffer[0] >> 5);
3996 return FDC_82078_UNKN;
3998 } /* get_fdc_version */
4000 /* lilo configuration */
4002 static void __init floppy_set_flags(int *ints, int param, int param2)
4006 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4008 default_drive_params[i].params.flags |= param2;
4010 default_drive_params[i].params.flags &= ~param2;
4012 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param);
4015 static void __init daring(int *ints, int param, int param2)
4019 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4021 default_drive_params[i].params.select_delay = 0;
4022 default_drive_params[i].params.flags |=
4023 FD_SILENT_DCL_CLEAR;
4025 default_drive_params[i].params.select_delay =
4027 default_drive_params[i].params.flags &=
4028 ~FD_SILENT_DCL_CLEAR;
4031 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken");
4034 static void __init set_cmos(int *ints, int dummy, int dummy2)
4036 int current_drive = 0;
4039 DPRINT("wrong number of parameters for CMOS\n");
4042 current_drive = ints[1];
4043 if (current_drive < 0 || current_drive >= 8) {
4044 DPRINT("bad drive for set_cmos\n");
4048 if (current_drive >= 4 && !FDC2)
4052 DPRINT("setting CMOS code to %d\n", ints[2]);
4055 static struct param_table {
4057 void (*fn) (int *ints, int param, int param2);
4061 } config_params[] __initdata = {
4062 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4063 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4064 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0},
4065 {"irq", NULL, &FLOPPY_IRQ, 6, 0},
4066 {"dma", NULL, &FLOPPY_DMA, 2, 0},
4067 {"daring", daring, NULL, 1, 0},
4069 {"two_fdc", NULL, &FDC2, 0x370, 0},
4070 {"one_fdc", NULL, &FDC2, 0, 0},
4072 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL},
4073 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL},
4074 {"messages", floppy_set_flags, NULL, 1, FTD_MSG},
4075 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR},
4076 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG},
4077 {"nodma", NULL, &can_use_virtual_dma, 1, 0},
4078 {"omnibook", NULL, &can_use_virtual_dma, 1, 0},
4079 {"yesdma", NULL, &can_use_virtual_dma, 0, 0},
4080 {"fifo_depth", NULL, &fifo_depth, 0xa, 0},
4081 {"nofifo", NULL, &no_fifo, 0x20, 0},
4082 {"usefifo", NULL, &no_fifo, 0, 0},
4083 {"cmos", set_cmos, NULL, 0, 0},
4084 {"slow", NULL, &slow_floppy, 1, 0},
4085 {"unexpected_interrupts", NULL, &print_unex, 1, 0},
4086 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0},
4087 {"L40SX", NULL, &print_unex, 0, 0}
4092 static int __init floppy_setup(char *str)
4098 str = get_options(str, ARRAY_SIZE(ints), ints);
4100 for (i = 0; i < ARRAY_SIZE(config_params); i++) {
4101 if (strcmp(str, config_params[i].name) == 0) {
4105 param = config_params[i].def_param;
4106 if (config_params[i].fn)
4109 config_params[i].param2);
4110 if (config_params[i].var) {
4111 DPRINT("%s=%d\n", str, param);
4112 *config_params[i].var = param;
4119 DPRINT("unknown floppy option [%s]\n", str);
4121 DPRINT("allowed options are:");
4122 for (i = 0; i < ARRAY_SIZE(config_params); i++)
4123 printk(" %s", config_params[i].name);
4126 DPRINT("botched floppy option\n");
4127 DPRINT("Read Documentation/floppy.txt\n");
4131 static int have_no_fdc = -ENODEV;
4133 static ssize_t floppy_cmos_show(struct device *dev,
4134 struct device_attribute *attr, char *buf)
4136 struct platform_device *p;
4139 p = container_of(dev, struct platform_device,dev);
4141 return sprintf(buf, "%X\n", UDP->cmos);
4143 DEVICE_ATTR(cmos,S_IRUGO,floppy_cmos_show,NULL);
4145 static void floppy_device_release(struct device *dev)
4149 static struct platform_device floppy_device[N_DRIVE];
4151 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
4153 int drive = (*part & 3) | ((*part & 0x80) >> 5);
4154 if (drive >= N_DRIVE ||
4155 !(allowed_drive_mask & (1 << drive)) ||
4156 fdc_state[FDC(drive)].version == FDC_NONE)
4158 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type))
4161 return get_disk(disks[drive]);
4164 static int __init floppy_init(void)
4169 #if defined(CONFIG_PPC)
4170 if (check_legacy_ioport(FDC1))
4176 for (dr = 0; dr < N_DRIVE; dr++) {
4177 disks[dr] = alloc_disk(1);
4183 disks[dr]->major = FLOPPY_MAJOR;
4184 disks[dr]->first_minor = TOMINOR(dr);
4185 disks[dr]->fops = &floppy_fops;
4186 sprintf(disks[dr]->disk_name, "fd%d", dr);
4188 init_timer(&motor_off_timer[dr]);
4189 motor_off_timer[dr].data = dr;
4190 motor_off_timer[dr].function = motor_off_callback;
4193 err = register_blkdev(FLOPPY_MAJOR, "fd");
4197 floppy_queue = blk_init_queue(do_fd_request, &floppy_lock);
4198 if (!floppy_queue) {
4200 goto out_unreg_blkdev;
4202 blk_queue_max_sectors(floppy_queue, 64);
4204 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
4205 floppy_find, NULL, NULL);
4207 for (i = 0; i < 256; i++)
4209 floppy_sizes[i] = floppy_type[ITYPE(i)].size;
4211 floppy_sizes[i] = MAX_DISK_SIZE << 1;
4213 reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT);
4216 for (i = 0; i < N_FDC; i++) {
4221 #if defined(__sparc__) || defined(__mc68000__)
4222 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4226 FDCS->version = FDC_82072A;
4230 use_virtual_dma = can_use_virtual_dma & 1;
4231 fdc_state[0].address = FDC1;
4232 if (fdc_state[0].address == -1) {
4233 del_timer(&fd_timeout);
4235 goto out_unreg_region;
4238 fdc_state[1].address = FDC2;
4241 fdc = 0; /* reset fdc in case of unexpected interrupt */
4242 err = floppy_grab_irq_and_dma();
4244 del_timer(&fd_timeout);
4246 goto out_unreg_region;
4249 /* initialise drive state */
4250 for (drive = 0; drive < N_DRIVE; drive++) {
4253 USETF(FD_DISK_NEWCHANGE);
4254 USETF(FD_DISK_CHANGED);
4256 UDRS->fd_device = -1;
4257 floppy_track_buffer = NULL;
4258 max_buffer_sectors = 0;
4261 * Small 10 msec delay to let through any interrupt that
4262 * initialization might have triggered, to not
4263 * confuse detection:
4267 for (i = 0; i < N_FDC; i++) {
4269 FDCS->driver_version = FD_DRIVER_VERSION;
4270 for (unit = 0; unit < 4; unit++)
4271 FDCS->track[unit] = 0;
4272 if (FDCS->address == -1)
4275 if (user_reset_fdc(-1, FD_RESET_ALWAYS, 0)) {
4276 /* free ioports reserved by floppy_grab_irq_and_dma() */
4277 release_region(FDCS->address + 2, 4);
4278 release_region(FDCS->address + 7, 1);
4280 FDCS->version = FDC_NONE;
4283 /* Try to determine the floppy controller type */
4284 FDCS->version = get_fdc_version();
4285 if (FDCS->version == FDC_NONE) {
4286 /* free ioports reserved by floppy_grab_irq_and_dma() */
4287 release_region(FDCS->address + 2, 4);
4288 release_region(FDCS->address + 7, 1);
4292 if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A)
4293 can_use_virtual_dma = 0;
4296 /* Not all FDCs seem to be able to handle the version command
4297 * properly, so force a reset for the standard FDC clones,
4298 * to avoid interrupt garbage.
4300 user_reset_fdc(-1, FD_RESET_ALWAYS, 0);
4303 del_timer(&fd_timeout);
4307 DPRINT("no floppy controllers found\n");
4309 goto out_flush_work;
4312 for (drive = 0; drive < N_DRIVE; drive++) {
4313 if (!(allowed_drive_mask & (1 << drive)))
4315 if (fdc_state[FDC(drive)].version == FDC_NONE)
4318 floppy_device[drive].name = floppy_device_name;
4319 floppy_device[drive].id = drive;
4320 floppy_device[drive].dev.release = floppy_device_release;
4322 err = platform_device_register(&floppy_device[drive]);
4324 goto out_flush_work;
4326 err = device_create_file(&floppy_device[drive].dev,&dev_attr_cmos);
4328 goto out_unreg_platform_dev;
4330 /* to be cleaned up... */
4331 disks[drive]->private_data = (void *)(long)drive;
4332 disks[drive]->queue = floppy_queue;
4333 disks[drive]->flags |= GENHD_FL_REMOVABLE;
4334 disks[drive]->driverfs_dev = &floppy_device[drive].dev;
4335 add_disk(disks[drive]);
4340 out_unreg_platform_dev:
4341 platform_device_unregister(&floppy_device[drive]);
4343 flush_scheduled_work();
4345 floppy_release_irq_and_dma();
4347 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4348 blk_cleanup_queue(floppy_queue);
4350 unregister_blkdev(FLOPPY_MAJOR, "fd");
4353 del_timer(&motor_off_timer[dr]);
4354 put_disk(disks[dr]);
4359 static DEFINE_SPINLOCK(floppy_usage_lock);
4361 static int floppy_grab_irq_and_dma(void)
4363 unsigned long flags;
4365 spin_lock_irqsave(&floppy_usage_lock, flags);
4366 if (usage_count++) {
4367 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4370 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4373 * We might have scheduled a free_irq(), wait it to
4376 flush_scheduled_work();
4378 if (fd_request_irq()) {
4379 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4381 spin_lock_irqsave(&floppy_usage_lock, flags);
4383 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4386 if (fd_request_dma()) {
4387 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4389 if (can_use_virtual_dma & 2)
4390 use_virtual_dma = can_use_virtual_dma = 1;
4391 if (!(can_use_virtual_dma & 1)) {
4393 spin_lock_irqsave(&floppy_usage_lock, flags);
4395 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4400 for (fdc = 0; fdc < N_FDC; fdc++) {
4401 if (FDCS->address != -1) {
4402 if (!request_region(FDCS->address + 2, 4, "floppy")) {
4403 DPRINT("Floppy io-port 0x%04lx in use\n",
4407 if (!request_region(FDCS->address + 7, 1, "floppy DIR")) {
4408 DPRINT("Floppy io-port 0x%04lx in use\n",
4412 /* address + 6 is reserved, and may be taken by IDE.
4413 * Unfortunately, Adaptec doesn't know this :-(, */
4416 for (fdc = 0; fdc < N_FDC; fdc++) {
4417 if (FDCS->address != -1) {
4419 fd_outb(FDCS->dor, FD_DOR);
4423 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4425 for (fdc = 0; fdc < N_FDC; fdc++)
4426 if (FDCS->address != -1)
4427 fd_outb(FDCS->dor, FD_DOR);
4429 * The driver will try and free resources and relies on us
4430 * to know if they were allocated or not.
4433 irqdma_allocated = 1;
4436 release_region(FDCS->address + 2, 4);
4440 while (--fdc >= 0) {
4441 release_region(FDCS->address + 2, 4);
4442 release_region(FDCS->address + 7, 1);
4444 spin_lock_irqsave(&floppy_usage_lock, flags);
4446 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4450 static void floppy_release_irq_and_dma(void)
4453 #ifdef FLOPPY_SANITY_CHECK
4459 unsigned long tmpaddr;
4460 unsigned long flags;
4462 spin_lock_irqsave(&floppy_usage_lock, flags);
4463 if (--usage_count) {
4464 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4467 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4468 if (irqdma_allocated) {
4472 irqdma_allocated = 0;
4478 floppy_enable_hlt();
4480 if (floppy_track_buffer && max_buffer_sectors) {
4481 tmpsize = max_buffer_sectors * 1024;
4482 tmpaddr = (unsigned long)floppy_track_buffer;
4483 floppy_track_buffer = NULL;
4484 max_buffer_sectors = 0;
4485 buffer_min = buffer_max = -1;
4486 fd_dma_mem_free(tmpaddr, tmpsize);
4488 #ifdef FLOPPY_SANITY_CHECK
4490 for (drive = 0; drive < N_FDC * 4; drive++)
4491 if (timer_pending(motor_off_timer + drive))
4492 printk("motor off timer %d still active\n", drive);
4495 if (timer_pending(&fd_timeout))
4496 printk("floppy timer still active:%s\n", timeout_message);
4497 if (timer_pending(&fd_timer))
4498 printk("auxiliary floppy timer still active\n");
4499 if (work_pending(&floppy_work))
4500 printk("work still pending\n");
4503 for (fdc = 0; fdc < N_FDC; fdc++)
4504 if (FDCS->address != -1) {
4505 release_region(FDCS->address + 2, 4);
4506 release_region(FDCS->address + 7, 1);
4513 static char *floppy;
4515 static void __init parse_floppy_cfg_string(char *cfg)
4520 for (ptr = cfg; *cfg && *cfg != ' ' && *cfg != '\t'; cfg++) ;
4530 static int __init floppy_module_init(void)
4533 parse_floppy_cfg_string(floppy);
4534 return floppy_init();
4536 module_init(floppy_module_init);
4538 static void __exit floppy_module_exit(void)
4542 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4543 unregister_blkdev(FLOPPY_MAJOR, "fd");
4545 for (drive = 0; drive < N_DRIVE; drive++) {
4546 del_timer_sync(&motor_off_timer[drive]);
4548 if ((allowed_drive_mask & (1 << drive)) &&
4549 fdc_state[FDC(drive)].version != FDC_NONE) {
4550 del_gendisk(disks[drive]);
4551 device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
4552 platform_device_unregister(&floppy_device[drive]);
4554 put_disk(disks[drive]);
4557 del_timer_sync(&fd_timeout);
4558 del_timer_sync(&fd_timer);
4559 blk_cleanup_queue(floppy_queue);
4562 floppy_release_irq_and_dma();
4564 /* eject disk, if any */
4567 module_exit(floppy_module_exit);
4569 module_param(floppy, charp, 0);
4570 module_param(FLOPPY_IRQ, int, 0);
4571 module_param(FLOPPY_DMA, int, 0);
4572 MODULE_AUTHOR("Alain L. Knaff");
4573 MODULE_SUPPORTED_DEVICE("fd");
4574 MODULE_LICENSE("GPL");
4578 __setup("floppy=", floppy_setup);
4579 module_init(floppy_init)
4582 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);