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 */
156 #define debug_dcl(test, fmt, args...) \
157 do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0)
159 #define debug_dcl(test, fmt, args...) \
160 do { if (0) DPRINT(fmt, ##args); } while (0)
164 /* do print messages for unexpected interrupts */
165 static int print_unex = 1;
166 #include <linux/module.h>
167 #include <linux/sched.h>
168 #include <linux/fs.h>
169 #include <linux/kernel.h>
170 #include <linux/timer.h>
171 #include <linux/workqueue.h>
173 #include <linux/fdreg.h>
174 #include <linux/fd.h>
175 #include <linux/hdreg.h>
176 #include <linux/errno.h>
177 #include <linux/slab.h>
178 #include <linux/mm.h>
179 #include <linux/bio.h>
180 #include <linux/string.h>
181 #include <linux/jiffies.h>
182 #include <linux/fcntl.h>
183 #include <linux/delay.h>
184 #include <linux/mc146818rtc.h> /* CMOS defines */
185 #include <linux/ioport.h>
186 #include <linux/interrupt.h>
187 #include <linux/init.h>
188 #include <linux/platform_device.h>
189 #include <linux/mod_devicetable.h>
190 #include <linux/buffer_head.h> /* for invalidate_buffers() */
191 #include <linux/mutex.h>
192 #include <linux/io.h>
193 #include <linux/uaccess.h>
196 * PS/2 floppies have much slower step rates than regular floppies.
197 * It's been recommended that take about 1/4 of the default speed
198 * in some more extreme cases.
200 static int slow_floppy;
204 #include <asm/system.h>
206 static int FLOPPY_IRQ = 6;
207 static int FLOPPY_DMA = 2;
208 static int can_use_virtual_dma = 2;
210 * can use virtual DMA:
211 * 0 = use of virtual DMA disallowed by config
212 * 1 = use of virtual DMA prescribed by config
213 * 2 = no virtual DMA preference configured. By default try hard DMA,
214 * but fall back on virtual DMA when not enough memory available
217 static int use_virtual_dma;
221 * 1 using virtual DMA
222 * This variable is set to virtual when a DMA mem problem arises, and
223 * reset back in floppy_grab_irq_and_dma.
224 * It is not safe to reset it in other circumstances, because the floppy
225 * driver may have several buffers in use at once, and we do currently not
226 * record each buffers capabilities
229 static DEFINE_SPINLOCK(floppy_lock);
231 static unsigned short virtual_dma_port = 0x3f0;
232 irqreturn_t floppy_interrupt(int irq, void *dev_id);
233 static int set_dor(int fdc, char mask, char data);
235 #define K_64 0x10000 /* 64KB */
237 /* the following is the mask of allowed drives. By default units 2 and
238 * 3 of both floppy controllers are disabled, because switching on the
239 * motor of these drives causes system hangs on some PCI computers. drive
240 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
241 * a drive is allowed.
243 * NOTE: This must come before we include the arch floppy header because
244 * some ports reference this variable from there. -DaveM
247 static int allowed_drive_mask = 0x33;
249 #include <asm/floppy.h>
251 static int irqdma_allocated;
253 #define DEVICE_NAME "floppy"
255 #include <linux/blkdev.h>
256 #include <linux/blkpg.h>
257 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
258 #include <linux/completion.h>
260 static struct request *current_req;
261 static struct request_queue *floppy_queue;
262 static void do_fd_request(struct request_queue *q);
264 #ifndef fd_get_dma_residue
265 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
268 /* Dma Memory related stuff */
270 #ifndef fd_dma_mem_free
271 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
274 #ifndef fd_dma_mem_alloc
275 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size))
278 static inline void fallback_on_nodma_alloc(char **addr, size_t l)
280 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
282 return; /* we have the memory */
283 if (can_use_virtual_dma != 2)
284 return; /* no fallback allowed */
285 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n");
286 *addr = (char *)nodma_mem_alloc(l);
292 /* End dma memory related stuff */
294 static unsigned long fake_change;
295 static int initialising = 1;
297 #define ITYPE(x) (((x) >> 2) & 0x1f)
298 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
299 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
300 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
301 /* reverse mapping from unit and fdc to drive */
302 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
304 #define DP (&drive_params[current_drive])
305 #define DRS (&drive_state[current_drive])
306 #define DRWE (&write_errors[current_drive])
307 #define FDCS (&fdc_state[fdc])
309 #define UDP (&drive_params[drive])
310 #define UDRS (&drive_state[drive])
311 #define UDRWE (&write_errors[drive])
312 #define UFDCS (&fdc_state[FDC(drive)])
314 #define DPRINT(format, args...) \
315 pr_info(DEVICE_NAME "%d: " format, current_drive, ##args)
317 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
318 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
321 #define COMMAND (raw_cmd->cmd[0])
322 #define DR_SELECT (raw_cmd->cmd[1])
323 #define TRACK (raw_cmd->cmd[2])
324 #define HEAD (raw_cmd->cmd[3])
325 #define SECTOR (raw_cmd->cmd[4])
326 #define SIZECODE (raw_cmd->cmd[5])
327 #define SECT_PER_TRACK (raw_cmd->cmd[6])
328 #define GAP (raw_cmd->cmd[7])
329 #define SIZECODE2 (raw_cmd->cmd[8])
333 #define F_SIZECODE (raw_cmd->cmd[2])
334 #define F_SECT_PER_TRACK (raw_cmd->cmd[3])
335 #define F_GAP (raw_cmd->cmd[4])
336 #define F_FILL (raw_cmd->cmd[5])
340 * Maximum disk size (in kilobytes).
341 * This default is used whenever the current disk size is unknown.
342 * [Now it is rather a minimum]
344 #define MAX_DISK_SIZE 4 /* 3984 */
347 * globals used by 'result()'
349 #define MAX_REPLIES 16
350 static unsigned char reply_buffer[MAX_REPLIES];
351 static int inr; /* size of reply buffer, when called from interrupt */
352 #define ST0 (reply_buffer[0])
353 #define ST1 (reply_buffer[1])
354 #define ST2 (reply_buffer[2])
355 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */
356 #define R_TRACK (reply_buffer[3])
357 #define R_HEAD (reply_buffer[4])
358 #define R_SECTOR (reply_buffer[5])
359 #define R_SIZECODE (reply_buffer[6])
361 #define SEL_DLY (2 * HZ / 100)
364 * this struct defines the different floppy drive types.
367 struct floppy_drive_params params;
368 const char *name; /* name printed while booting */
369 } default_drive_params[] = {
370 /* NOTE: the time values in jiffies should be in msec!
372 | Maximum data rate supported by drive type
373 | | Head load time, msec
374 | | | Head unload time, msec (not used)
375 | | | | Step rate interval, usec
376 | | | | | Time needed for spinup time (jiffies)
377 | | | | | | Timeout for spinning down (jiffies)
378 | | | | | | | Spindown offset (where disk stops)
379 | | | | | | | | Select delay
380 | | | | | | | | | RPS
381 | | | | | | | | | | Max number of tracks
382 | | | | | | | | | | | Interrupt timeout
383 | | | | | | | | | | | | Max nonintlv. sectors
384 | | | | | | | | | | | | | -Max Errors- flags */
385 {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0,
386 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" },
388 {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0,
389 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
391 {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0,
392 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
394 {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
395 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/
397 {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
398 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/
400 {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
401 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
403 {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
404 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/
405 /* | --autodetected formats--- | | |
406 * read_track | | Name printed when booting
408 * Frequency of disk change checks */
411 static struct floppy_drive_params drive_params[N_DRIVE];
412 static struct floppy_drive_struct drive_state[N_DRIVE];
413 static struct floppy_write_errors write_errors[N_DRIVE];
414 static struct timer_list motor_off_timer[N_DRIVE];
415 static struct gendisk *disks[N_DRIVE];
416 static struct block_device *opened_bdev[N_DRIVE];
417 static DEFINE_MUTEX(open_lock);
418 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
421 * This struct defines the different floppy types.
423 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
424 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
425 * tells if the disk is in Commodore 1581 format, which means side 0 sectors
426 * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
427 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
428 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
429 * side 0 is on physical side 0 (but with the misnamed sector IDs).
430 * 'stretch' should probably be renamed to something more general, like
433 * Bits 2 through 9 of 'stretch' tell the number of the first sector.
434 * The LSB (bit 2) is flipped. For most disks, the first sector
435 * is 1 (represented by 0x00<<2). For some CP/M and music sampler
436 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
437 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
439 * Other parameters should be self-explanatory (see also setfdprm(8)).
448 | | | | | | Data rate, | 0x40 for perp
449 | | | | | | | Spec1 (stepping rate, head unload
450 | | | | | | | | /fmt gap (gap2) */
451 static struct floppy_struct floppy_type[32] = {
452 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */
453 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
454 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
455 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
456 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
457 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
458 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
459 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
460 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
461 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
463 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
464 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
465 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
466 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
467 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
468 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
469 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
470 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
471 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
472 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
474 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
475 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
476 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
477 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
478 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
479 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
480 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
481 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
482 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
483 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
485 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
486 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
489 #define SECTSIZE (_FD_SECTSIZE(*floppy))
491 /* Auto-detection: Disk type used until the next media change occurs. */
492 static struct floppy_struct *current_type[N_DRIVE];
495 * User-provided type information. current_type points to
496 * the respective entry of this array.
498 static struct floppy_struct user_params[N_DRIVE];
500 static sector_t floppy_sizes[256];
502 static char floppy_device_name[] = "floppy";
505 * The driver is trying to determine the correct media format
506 * while probing is set. rw_interrupt() clears it after a
511 /* Synchronization of FDC access. */
512 #define FD_COMMAND_NONE -1
513 #define FD_COMMAND_ERROR 2
514 #define FD_COMMAND_OKAY 3
516 static volatile int command_status = FD_COMMAND_NONE;
517 static unsigned long fdc_busy;
518 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
519 static DECLARE_WAIT_QUEUE_HEAD(command_done);
521 #define NO_SIGNAL (!interruptible || !signal_pending(current))
522 #define CALL(x) if ((x) == -EINTR) return -EINTR
523 #define _WAIT(x,i) CALL(ret=wait_til_done((x),i))
524 #define WAIT(x) _WAIT((x),interruptible)
525 #define IWAIT(x) _WAIT((x),1)
527 /* Errors during formatting are counted here. */
528 static int format_errors;
530 /* Format request descriptor. */
531 static struct format_descr format_req;
534 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
535 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
536 * H is head unload time (1=16ms, 2=32ms, etc)
541 * Because these are written to by the DMA controller, they must
542 * not contain a 64k byte boundary crossing, or data will be
545 static char *floppy_track_buffer;
546 static int max_buffer_sectors;
549 typedef void (*done_f)(int);
550 static struct cont_t {
551 void (*interrupt)(void);
552 /* this is called after the interrupt of the
554 void (*redo)(void); /* this is called to retry the operation */
555 void (*error)(void); /* this is called to tally an error */
556 done_f done; /* this is called to say if the operation has
557 * succeeded/failed */
560 static void floppy_ready(void);
561 static void floppy_start(void);
562 static void process_fd_request(void);
563 static void recalibrate_floppy(void);
564 static void floppy_shutdown(unsigned long);
566 static int floppy_request_regions(int);
567 static void floppy_release_regions(int);
568 static int floppy_grab_irq_and_dma(void);
569 static void floppy_release_irq_and_dma(void);
572 * The "reset" variable should be tested whenever an interrupt is scheduled,
573 * after the commands have been sent. This is to ensure that the driver doesn't
574 * get wedged when the interrupt doesn't come because of a failed command.
575 * reset doesn't need to be tested before sending commands, because
576 * output_byte is automatically disabled when reset is set.
578 static void reset_fdc(void);
581 * These are global variables, as that's the easiest way to give
582 * information to interrupts. They are the data used for the current
586 #define NEED_1_RECAL -2
587 #define NEED_2_RECAL -3
589 static int usage_count;
591 /* buffer related variables */
592 static int buffer_track = -1;
593 static int buffer_drive = -1;
594 static int buffer_min = -1;
595 static int buffer_max = -1;
597 /* fdc related variables, should end up in a struct */
598 static struct floppy_fdc_state fdc_state[N_FDC];
599 static int fdc; /* current fdc */
601 static struct floppy_struct *_floppy = floppy_type;
602 static unsigned char current_drive;
603 static long current_count_sectors;
604 static unsigned char fsector_t; /* sector in track */
605 static unsigned char in_sector_offset; /* offset within physical sector,
606 * expressed in units of 512 bytes */
609 static inline int fd_eject(int drive)
620 static long unsigned debugtimer;
622 static inline void set_debugt(void)
624 debugtimer = jiffies;
627 static inline void debugt(const char *message)
629 if (DP->flags & DEBUGT)
630 pr_info("%s dtime=%lu\n", message, jiffies - debugtimer);
633 static inline void set_debugt(void) { }
634 static inline void debugt(const char *message) { }
637 typedef void (*timeout_fn)(unsigned long);
638 static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0);
640 static const char *timeout_message;
642 #ifdef FLOPPY_SANITY_CHECK
643 static void is_alive(const char *message)
645 /* this routine checks whether the floppy driver is "alive" */
646 if (test_bit(0, &fdc_busy) && command_status < 2
647 && !timer_pending(&fd_timeout)) {
648 DPRINT("timeout handler died: %s\n", message);
653 static void (*do_floppy)(void) = NULL;
655 #ifdef FLOPPY_SANITY_CHECK
659 static void (*lasthandler)(void);
660 static unsigned long interruptjiffies;
661 static unsigned long resultjiffies;
662 static int resultsize;
663 static unsigned long lastredo;
665 static struct output_log {
667 unsigned char status;
668 unsigned long jiffies;
669 } output_log[OLOGSIZE];
671 static int output_log_pos;
674 #define current_reqD -1
675 #define MAXTIMEOUT -2
677 static void __reschedule_timeout(int drive, const char *message, int marg)
679 if (drive == current_reqD)
680 drive = current_drive;
681 del_timer(&fd_timeout);
682 if (drive < 0 || drive >= N_DRIVE) {
683 fd_timeout.expires = jiffies + 20UL * HZ;
686 fd_timeout.expires = jiffies + UDP->timeout;
687 add_timer(&fd_timeout);
688 if (UDP->flags & FD_DEBUG)
689 DPRINT("reschedule timeout %s %d\n", message, marg);
690 timeout_message = message;
693 static void reschedule_timeout(int drive, const char *message, int marg)
697 spin_lock_irqsave(&floppy_lock, flags);
698 __reschedule_timeout(drive, message, marg);
699 spin_unlock_irqrestore(&floppy_lock, flags);
702 #define INFBOUND(a, b) (a) = max_t(int, a, b)
703 #define SUPBOUND(a, b) (a) = min_t(int, a, b)
706 * Bottom half floppy driver.
707 * ==========================
709 * This part of the file contains the code talking directly to the hardware,
710 * and also the main service loop (seek-configure-spinup-command)
715 * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
716 * and the last_checked date.
718 * last_checked is the date of the last check which showed 'no disk change'
719 * FD_DISK_CHANGE is set under two conditions:
720 * 1. The floppy has been changed after some i/o to that floppy already
722 * 2. No floppy disk is in the drive. This is done in order to ensure that
723 * requests are quickly flushed in case there is no disk in the drive. It
724 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
727 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
728 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
729 * each seek. If a disk is present, the disk change line should also be
730 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
731 * change line is set, this means either that no disk is in the drive, or
732 * that it has been removed since the last seek.
734 * This means that we really have a third possibility too:
735 * The floppy has been changed after the last seek.
738 static int disk_change(int drive)
740 int fdc = FDC(drive);
742 #ifdef FLOPPY_SANITY_CHECK
743 if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
744 DPRINT("WARNING disk change called early\n");
745 if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
746 (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
747 DPRINT("probing disk change on unselected drive\n");
748 DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive),
749 (unsigned int)FDCS->dor);
753 debug_dcl(UDP->flags,
754 "checking disk change line for drive %d\n", drive);
755 debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies);
756 debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80);
757 debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags);
759 if (UDP->flags & FD_BROKEN_DCL)
760 return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
761 if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) {
762 set_bit(FD_VERIFY_BIT, &UDRS->flags);
763 /* verify write protection */
765 if (UDRS->maxblock) /* mark it changed */
766 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
768 /* invalidate its geometry */
769 if (UDRS->keep_data >= 0) {
770 if ((UDP->flags & FTD_MSG) &&
771 current_type[drive] != NULL)
772 DPRINT("Disk type is undefined after "
774 current_type[drive] = NULL;
775 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1;
780 UDRS->last_checked = jiffies;
781 clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags);
786 static inline int is_selected(int dor, int unit)
788 return ((dor & (0x10 << unit)) && (dor & 3) == unit);
791 static int set_dor(int fdc, char mask, char data)
795 unsigned char newdor;
796 unsigned char olddor;
798 if (FDCS->address == -1)
802 newdor = (olddor & mask) | data;
803 if (newdor != olddor) {
805 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) {
806 drive = REVDRIVE(fdc, unit);
807 debug_dcl(UDP->flags,
808 "calling disk change from set_dor\n");
812 fd_outb(newdor, FD_DOR);
815 if (!is_selected(olddor, unit) && is_selected(newdor, unit)) {
816 drive = REVDRIVE(fdc, unit);
817 UDRS->select_date = jiffies;
823 static void twaddle(void)
825 if (DP->select_delay)
827 fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR);
828 fd_outb(FDCS->dor, FD_DOR);
829 DRS->select_date = jiffies;
832 /* reset all driver information about the current fdc. This is needed after
833 * a reset, and after a raw command. */
834 static void reset_fdc_info(int mode)
838 FDCS->spec1 = FDCS->spec2 = -1;
839 FDCS->need_configure = 1;
842 for (drive = 0; drive < N_DRIVE; drive++)
843 if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL))
844 UDRS->track = NEED_2_RECAL;
847 /* selects the fdc and drive, and enables the fdc's input/dma. */
848 static void set_fdc(int drive)
850 if (drive >= 0 && drive < N_DRIVE) {
852 current_drive = drive;
854 if (fdc != 1 && fdc != 0) {
855 pr_info("bad fdc value\n");
860 set_dor(1 - fdc, ~8, 0);
862 if (FDCS->rawcmd == 2)
864 if (fd_inb(FD_STATUS) != STATUS_READY)
868 /* locks the driver */
869 static int _lock_fdc(int drive, int interruptible, int line)
872 pr_err("Trying to lock fdc while usage count=0 at line %d\n",
877 if (test_and_set_bit(0, &fdc_busy)) {
878 DECLARE_WAITQUEUE(wait, current);
879 add_wait_queue(&fdc_wait, &wait);
882 set_current_state(TASK_INTERRUPTIBLE);
884 if (!test_and_set_bit(0, &fdc_busy))
890 remove_wait_queue(&fdc_wait, &wait);
895 set_current_state(TASK_RUNNING);
896 remove_wait_queue(&fdc_wait, &wait);
897 flush_scheduled_work();
899 command_status = FD_COMMAND_NONE;
901 __reschedule_timeout(drive, "lock fdc", 0);
906 #define lock_fdc(drive, interruptible) \
907 _lock_fdc(drive, interruptible, __LINE__)
909 /* unlocks the driver */
910 static inline void unlock_fdc(void)
915 if (!test_bit(0, &fdc_busy))
916 DPRINT("FDC access conflict!\n");
919 DPRINT("device interrupt still active at FDC release: %p!\n",
921 command_status = FD_COMMAND_NONE;
922 spin_lock_irqsave(&floppy_lock, flags);
923 del_timer(&fd_timeout);
925 clear_bit(0, &fdc_busy);
926 if (current_req || blk_peek_request(floppy_queue))
927 do_fd_request(floppy_queue);
928 spin_unlock_irqrestore(&floppy_lock, flags);
932 /* switches the motor off after a given timeout */
933 static void motor_off_callback(unsigned long nr)
935 unsigned char mask = ~(0x10 << UNIT(nr));
937 set_dor(FDC(nr), mask, 0);
940 /* schedules motor off */
941 static void floppy_off(unsigned int drive)
943 unsigned long volatile delta;
944 int fdc = FDC(drive);
946 if (!(FDCS->dor & (0x10 << UNIT(drive))))
949 del_timer(motor_off_timer + drive);
951 /* make spindle stop in a position which minimizes spinup time
954 delta = jiffies - UDRS->first_read_date + HZ -
955 UDP->spindown_offset;
956 delta = ((delta * UDP->rps) % HZ) / UDP->rps;
957 motor_off_timer[drive].expires =
958 jiffies + UDP->spindown - delta;
960 add_timer(motor_off_timer + drive);
964 * cycle through all N_DRIVE floppy drives, for disk change testing.
965 * stopping at current drive. This is done before any long operation, to
966 * be sure to have up to date disk change information.
968 static void scandrives(void)
974 if (DP->select_delay)
977 saved_drive = current_drive;
978 for (i = 0; i < N_DRIVE; i++) {
979 drive = (saved_drive + i + 1) % N_DRIVE;
980 if (UDRS->fd_ref == 0 || UDP->select_delay != 0)
981 continue; /* skip closed drives */
983 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &
984 (0x10 << UNIT(drive))))
985 /* switch the motor off again, if it was off to
987 set_dor(fdc, ~(0x10 << UNIT(drive)), 0);
989 set_fdc(saved_drive);
992 static void empty(void)
996 static DECLARE_WORK(floppy_work, NULL);
998 static void schedule_bh(void (*handler)(void))
1000 PREPARE_WORK(&floppy_work, (work_func_t)handler);
1001 schedule_work(&floppy_work);
1004 static DEFINE_TIMER(fd_timer, NULL, 0, 0);
1006 static void cancel_activity(void)
1008 unsigned long flags;
1010 spin_lock_irqsave(&floppy_lock, flags);
1012 PREPARE_WORK(&floppy_work, (work_func_t)empty);
1013 del_timer(&fd_timer);
1014 spin_unlock_irqrestore(&floppy_lock, flags);
1017 /* this function makes sure that the disk stays in the drive during the
1019 static void fd_watchdog(void)
1021 debug_dcl(DP->flags, "calling disk change from watchdog\n");
1023 if (disk_change(current_drive)) {
1024 DPRINT("disk removed during i/o\n");
1029 del_timer(&fd_timer);
1030 fd_timer.function = (timeout_fn)fd_watchdog;
1031 fd_timer.expires = jiffies + HZ / 10;
1032 add_timer(&fd_timer);
1036 static void main_command_interrupt(void)
1038 del_timer(&fd_timer);
1042 /* waits for a delay (spinup or select) to pass */
1043 static int fd_wait_for_completion(unsigned long delay, timeout_fn function)
1046 reset_fdc(); /* do the reset during sleep to win time
1047 * if we don't need to sleep, it's a good
1048 * occasion anyways */
1052 if (time_before(jiffies, delay)) {
1053 del_timer(&fd_timer);
1054 fd_timer.function = function;
1055 fd_timer.expires = delay;
1056 add_timer(&fd_timer);
1062 static DEFINE_SPINLOCK(floppy_hlt_lock);
1063 static int hlt_disabled;
1064 static void floppy_disable_hlt(void)
1066 unsigned long flags;
1068 spin_lock_irqsave(&floppy_hlt_lock, flags);
1069 if (!hlt_disabled) {
1071 #ifdef HAVE_DISABLE_HLT
1075 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1078 static void floppy_enable_hlt(void)
1080 unsigned long flags;
1082 spin_lock_irqsave(&floppy_hlt_lock, flags);
1085 #ifdef HAVE_DISABLE_HLT
1089 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1092 static void setup_DMA(void)
1096 #ifdef FLOPPY_SANITY_CHECK
1097 if (raw_cmd->length == 0) {
1100 pr_info("zero dma transfer size:");
1101 for (i = 0; i < raw_cmd->cmd_count; i++)
1102 pr_cont("%x,", raw_cmd->cmd[i]);
1108 if (((unsigned long)raw_cmd->kernel_data) % 512) {
1109 pr_info("non aligned address: %p\n", raw_cmd->kernel_data);
1115 f = claim_dma_lock();
1118 if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length,
1119 (raw_cmd->flags & FD_RAW_READ) ?
1120 DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) {
1121 release_dma_lock(f);
1126 release_dma_lock(f);
1129 fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length);
1130 fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ?
1131 DMA_MODE_READ : DMA_MODE_WRITE);
1132 fd_set_dma_addr(raw_cmd->kernel_data);
1133 fd_set_dma_count(raw_cmd->length);
1134 virtual_dma_port = FDCS->address;
1136 release_dma_lock(f);
1138 floppy_disable_hlt();
1141 static void show_floppy(void);
1143 /* waits until the fdc becomes ready */
1144 static int wait_til_ready(void)
1151 for (counter = 0; counter < 10000; counter++) {
1152 status = fd_inb(FD_STATUS);
1153 if (status & STATUS_READY)
1156 if (!initialising) {
1157 DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc);
1164 /* sends a command byte to the fdc */
1165 static int output_byte(char byte)
1167 int status = wait_til_ready();
1171 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY) {
1172 fd_outb(byte, FD_DATA);
1173 #ifdef FLOPPY_SANITY_CHECK
1174 output_log[output_log_pos].data = byte;
1175 output_log[output_log_pos].status = status;
1176 output_log[output_log_pos].jiffies = jiffies;
1177 output_log_pos = (output_log_pos + 1) % OLOGSIZE;
1182 if (!initialising) {
1183 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
1190 /* gets the response from the fdc */
1191 static int result(void)
1196 for (i = 0; i < MAX_REPLIES; i++) {
1197 status = wait_til_ready();
1200 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA;
1201 if ((status & ~STATUS_BUSY) == STATUS_READY) {
1202 #ifdef FLOPPY_SANITY_CHECK
1203 resultjiffies = jiffies;
1208 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY))
1209 reply_buffer[i] = fd_inb(FD_DATA);
1213 if (!initialising) {
1215 ("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
1223 #define MORE_OUTPUT -2
1224 /* does the fdc need more output? */
1225 static int need_more_output(void)
1227 int status = wait_til_ready();
1231 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY)
1236 /* Set perpendicular mode as required, based on data rate, if supported.
1237 * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1239 static inline void perpendicular_mode(void)
1241 unsigned char perp_mode;
1243 if (raw_cmd->rate & 0x40) {
1244 switch (raw_cmd->rate & 3) {
1252 DPRINT("Invalid data rate for perpendicular mode!\n");
1256 * convenient way to return to
1257 * redo without too much hassle
1258 * (deep stack et al.)
1265 if (FDCS->perp_mode == perp_mode)
1267 if (FDCS->version >= FDC_82077_ORIG) {
1268 output_byte(FD_PERPENDICULAR);
1269 output_byte(perp_mode);
1270 FDCS->perp_mode = perp_mode;
1271 } else if (perp_mode) {
1272 DPRINT("perpendicular mode not supported by this FDC.\n");
1274 } /* perpendicular_mode */
1276 static int fifo_depth = 0xa;
1279 static int fdc_configure(void)
1282 output_byte(FD_CONFIGURE);
1283 if (need_more_output() != MORE_OUTPUT)
1286 output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf));
1287 output_byte(0); /* pre-compensation from track
1292 #define NOMINAL_DTR 500
1294 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1295 * head load time, and DMA disable flag to values needed by floppy.
1297 * The value "dtr" is the data transfer rate in Kbps. It is needed
1298 * to account for the data rate-based scaling done by the 82072 and 82077
1299 * FDC types. This parameter is ignored for other types of FDCs (i.e.
1302 * Note that changing the data transfer rate has a (probably deleterious)
1303 * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1304 * fdc_specify is called again after each data transfer rate
1307 * srt: 1000 to 16000 in microseconds
1308 * hut: 16 to 240 milliseconds
1309 * hlt: 2 to 254 milliseconds
1311 * These values are rounded up to the next highest available delay time.
1313 static void fdc_specify(void)
1315 unsigned char spec1;
1316 unsigned char spec2;
1320 unsigned long dtr = NOMINAL_DTR;
1321 unsigned long scale_dtr = NOMINAL_DTR;
1322 int hlt_max_code = 0x7f;
1323 int hut_max_code = 0xf;
1325 if (FDCS->need_configure && FDCS->version >= FDC_82072A) {
1327 FDCS->need_configure = 0;
1330 switch (raw_cmd->rate & 0x03) {
1336 if (FDCS->version >= FDC_82078) {
1337 /* chose the default rate table, not the one
1338 * where 1 = 2 Mbps */
1339 output_byte(FD_DRIVESPEC);
1340 if (need_more_output() == MORE_OUTPUT) {
1341 output_byte(UNIT(current_drive));
1351 if (FDCS->version >= FDC_82072) {
1353 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1354 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1357 /* Convert step rate from microseconds to milliseconds and 4 bits */
1358 srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR);
1365 hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR);
1368 else if (hlt > 0x7f)
1371 hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR);
1377 spec1 = (srt << 4) | hut;
1378 spec2 = (hlt << 1) | (use_virtual_dma & 1);
1380 /* If these parameters did not change, just return with success */
1381 if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) {
1382 /* Go ahead and set spec1 and spec2 */
1383 output_byte(FD_SPECIFY);
1384 output_byte(FDCS->spec1 = spec1);
1385 output_byte(FDCS->spec2 = spec2);
1389 /* Set the FDC's data transfer rate on behalf of the specified drive.
1390 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1391 * of the specify command (i.e. using the fdc_specify function).
1393 static int fdc_dtr(void)
1395 /* If data rate not already set to desired value, set it. */
1396 if ((raw_cmd->rate & 3) == FDCS->dtr)
1400 fd_outb(raw_cmd->rate & 3, FD_DCR);
1402 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1403 * need a stabilization period of several milliseconds to be
1404 * enforced after data rate changes before R/W operations.
1405 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1407 FDCS->dtr = raw_cmd->rate & 3;
1408 return fd_wait_for_completion(jiffies + 2UL * HZ / 100,
1409 (timeout_fn)floppy_ready);
1412 static void tell_sector(void)
1414 pr_cont(": track %d, head %d, sector %d, size %d",
1415 R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE);
1418 static void print_errors(void)
1421 if (ST0 & ST0_ECE) {
1422 pr_cont("Recalibrate failed!");
1423 } else if (ST2 & ST2_CRC) {
1424 pr_cont("data CRC error");
1426 } else if (ST1 & ST1_CRC) {
1427 pr_cont("CRC error");
1429 } else if ((ST1 & (ST1_MAM | ST1_ND)) ||
1432 pr_cont("sector not found");
1435 pr_cont("probe failed...");
1436 } else if (ST2 & ST2_WC) { /* seek error */
1437 pr_cont("wrong cylinder");
1438 } else if (ST2 & ST2_BC) { /* cylinder marked as bad */
1439 pr_cont("bad cylinder");
1441 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
1449 * OK, this error interpreting routine is called after a
1450 * DMA read/write has succeeded
1451 * or failed, so we check the results, and copy any buffers.
1452 * hhb: Added better error reporting.
1453 * ak: Made this into a separate routine.
1455 static int interpret_errors(void)
1460 DPRINT("-- FDC reply error");
1465 /* check IC to find cause of interrupt */
1466 switch (ST0 & ST0_INTR) {
1467 case 0x40: /* error occurred during command execution */
1469 return 0; /* occurs with pseudo-DMA */
1472 DPRINT("Drive is write protected\n");
1473 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
1476 } else if (ST1 & ST1_ND) {
1477 set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags);
1478 } else if (ST1 & ST1_OR) {
1479 if (DP->flags & FTD_MSG)
1480 DPRINT("Over/Underrun - retrying\n");
1482 } else if (*errors >= DP->max_errors.reporting) {
1485 if (ST2 & ST2_WC || ST2 & ST2_BC)
1486 /* wrong cylinder => recal */
1487 DRS->track = NEED_2_RECAL;
1489 case 0x80: /* invalid command given */
1490 DPRINT("Invalid FDC command given!\n");
1494 DPRINT("Abnormal termination caused by polling\n");
1497 default: /* (0) Normal command termination */
1503 * This routine is called when everything should be correctly set up
1504 * for the transfer (i.e. floppy motor is on, the correct floppy is
1505 * selected, and the head is sitting on the right track).
1507 static void setup_rw_floppy(void)
1513 unsigned long ready_date;
1514 timeout_fn function;
1516 flags = raw_cmd->flags;
1517 if (flags & (FD_RAW_READ | FD_RAW_WRITE))
1518 flags |= FD_RAW_INTR;
1520 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) {
1521 ready_date = DRS->spinup_date + DP->spinup;
1522 /* If spinup will take a long time, rerun scandrives
1523 * again just before spinup completion. Beware that
1524 * after scandrives, we must again wait for selection.
1526 if (time_after(ready_date, jiffies + DP->select_delay)) {
1527 ready_date -= DP->select_delay;
1528 function = (timeout_fn)floppy_start;
1530 function = (timeout_fn)setup_rw_floppy;
1532 /* wait until the floppy is spinning fast enough */
1533 if (fd_wait_for_completion(ready_date, function))
1536 dflags = DRS->flags;
1538 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE))
1541 if (flags & FD_RAW_INTR)
1542 do_floppy = main_command_interrupt;
1545 for (i = 0; i < raw_cmd->cmd_count; i++)
1546 r |= output_byte(raw_cmd->cmd[i]);
1548 debugt("rw_command: ");
1556 if (!(flags & FD_RAW_INTR)) {
1559 } else if (flags & FD_RAW_NEED_DISK)
1563 static int blind_seek;
1566 * This is the routine called after every seek (or recalibrate) interrupt
1567 * from the floppy controller.
1569 static void seek_interrupt(void)
1571 debugt("seek interrupt:");
1572 if (inr != 2 || (ST0 & 0xF8) != 0x20) {
1573 DPRINT("seek failed\n");
1574 DRS->track = NEED_2_RECAL;
1579 if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) {
1580 debug_dcl(DP->flags,
1581 "clearing NEWCHANGE flag because of effective seek\n");
1582 debug_dcl(DP->flags, "jiffies=%lu\n", jiffies);
1583 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
1584 /* effective seek */
1585 DRS->select_date = jiffies;
1591 static void check_wp(void)
1593 if (test_bit(FD_VERIFY_BIT, &DRS->flags)) {
1594 /* check write protection */
1595 output_byte(FD_GETSTATUS);
1596 output_byte(UNIT(current_drive));
1597 if (result() != 1) {
1601 clear_bit(FD_VERIFY_BIT, &DRS->flags);
1602 clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags);
1603 debug_dcl(DP->flags,
1604 "checking whether disk is write protected\n");
1605 debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40);
1607 set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
1609 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
1613 static void seek_floppy(void)
1619 debug_dcl(DP->flags, "calling disk change from seek\n");
1621 if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) &&
1622 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) {
1623 /* the media changed flag should be cleared after the seek.
1624 * If it isn't, this means that there is really no disk in
1627 set_bit(FD_DISK_CHANGED_BIT, &DRS->flags);
1632 if (DRS->track <= NEED_1_RECAL) {
1633 recalibrate_floppy();
1635 } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) &&
1636 (raw_cmd->flags & FD_RAW_NEED_DISK) &&
1637 (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) {
1638 /* we seek to clear the media-changed condition. Does anybody
1639 * know a more elegant way, which works on all drives? */
1641 track = raw_cmd->track - 1;
1643 if (DP->flags & FD_SILENT_DCL_CLEAR) {
1644 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0);
1646 raw_cmd->flags |= FD_RAW_NEED_SEEK;
1652 if (raw_cmd->track != DRS->track &&
1653 (raw_cmd->flags & FD_RAW_NEED_SEEK))
1654 track = raw_cmd->track;
1661 do_floppy = seek_interrupt;
1662 output_byte(FD_SEEK);
1663 output_byte(UNIT(current_drive));
1664 if (output_byte(track) < 0) {
1668 debugt("seek command:");
1671 static void recal_interrupt(void)
1673 debugt("recal interrupt:");
1676 else if (ST0 & ST0_ECE) {
1677 switch (DRS->track) {
1679 debugt("recal interrupt need 1 recal:");
1680 /* after a second recalibrate, we still haven't
1681 * reached track 0. Probably no drive. Raise an
1682 * error, as failing immediately might upset
1683 * computers possessed by the Devil :-) */
1688 debugt("recal interrupt need 2 recal:");
1689 /* If we already did a recalibrate,
1690 * and we are not at track 0, this
1691 * means we have moved. (The only way
1692 * not to move at recalibration is to
1693 * be already at track 0.) Clear the
1694 * new change flag */
1695 debug_dcl(DP->flags,
1696 "clearing NEWCHANGE flag because of second recalibrate\n");
1698 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
1699 DRS->select_date = jiffies;
1702 debugt("recal interrupt default:");
1703 /* Recalibrate moves the head by at
1704 * most 80 steps. If after one
1705 * recalibrate we don't have reached
1706 * track 0, this might mean that we
1707 * started beyond track 80. Try
1709 DRS->track = NEED_1_RECAL;
1717 static void print_result(char *message, int inr)
1721 DPRINT("%s ", message);
1723 for (i = 0; i < inr; i++)
1724 pr_cont("repl[%d]=%x ", i, reply_buffer[i]);
1728 /* interrupt handler. Note that this can be called externally on the Sparc */
1729 irqreturn_t floppy_interrupt(int irq, void *dev_id)
1733 void (*handler)(void) = do_floppy;
1735 lasthandler = handler;
1736 interruptjiffies = jiffies;
1738 f = claim_dma_lock();
1740 release_dma_lock(f);
1742 floppy_enable_hlt();
1744 if (fdc >= N_FDC || FDCS->address == -1) {
1745 /* we don't even know which FDC is the culprit */
1746 pr_info("DOR0=%x\n", fdc_state[0].dor);
1747 pr_info("floppy interrupt on bizarre fdc %d\n", fdc);
1748 pr_info("handler=%p\n", handler);
1749 is_alive("bizarre fdc");
1754 /* We have to clear the reset flag here, because apparently on boxes
1755 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
1756 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
1757 * emission of the SENSEI's.
1758 * It is OK to emit floppy commands because we are in an interrupt
1759 * handler here, and thus we have to fear no interference of other
1763 do_print = !handler && print_unex && !initialising;
1767 print_result("unexpected interrupt", inr);
1771 output_byte(FD_SENSEI);
1774 print_result("sensei", inr);
1776 } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2
1783 schedule_bh(handler);
1784 is_alive("normal interrupt end");
1786 /* FIXME! Was it really for us? */
1790 static void recalibrate_floppy(void)
1792 debugt("recalibrate floppy:");
1793 do_floppy = recal_interrupt;
1794 output_byte(FD_RECALIBRATE);
1795 if (output_byte(UNIT(current_drive)) < 0) {
1802 * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1804 static void reset_interrupt(void)
1806 debugt("reset interrupt:");
1807 result(); /* get the status ready for set_fdc */
1809 pr_info("reset set in interrupt, calling %p\n", cont->error);
1810 cont->error(); /* a reset just after a reset. BAD! */
1816 * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1817 * or by setting the self clearing bit 7 of STATUS (newer FDCs)
1819 static void reset_fdc(void)
1821 unsigned long flags;
1823 do_floppy = reset_interrupt;
1827 /* Pseudo-DMA may intercept 'reset finished' interrupt. */
1828 /* Irrelevant for systems with true DMA (i386). */
1830 flags = claim_dma_lock();
1832 release_dma_lock(flags);
1834 if (FDCS->version >= FDC_82072A)
1835 fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS);
1837 fd_outb(FDCS->dor & ~0x04, FD_DOR);
1838 udelay(FD_RESET_DELAY);
1839 fd_outb(FDCS->dor, FD_DOR);
1843 static void show_floppy(void)
1848 pr_info("floppy driver state\n");
1849 pr_info("-------------------\n");
1850 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n",
1851 jiffies, interruptjiffies, jiffies - interruptjiffies,
1854 #ifdef FLOPPY_SANITY_CHECK
1855 pr_info("timeout_message=%s\n", timeout_message);
1856 pr_info("last output bytes:\n");
1857 for (i = 0; i < OLOGSIZE; i++)
1858 pr_info("%2x %2x %lu\n",
1859 output_log[(i + output_log_pos) % OLOGSIZE].data,
1860 output_log[(i + output_log_pos) % OLOGSIZE].status,
1861 output_log[(i + output_log_pos) % OLOGSIZE].jiffies);
1862 pr_info("last result at %lu\n", resultjiffies);
1863 pr_info("last redo_fd_request at %lu\n", lastredo);
1864 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1,
1865 reply_buffer, resultsize, true);
1868 pr_info("status=%x\n", fd_inb(FD_STATUS));
1869 pr_info("fdc_busy=%lu\n", fdc_busy);
1871 pr_info("do_floppy=%p\n", do_floppy);
1872 if (work_pending(&floppy_work))
1873 pr_info("floppy_work.func=%p\n", floppy_work.func);
1874 if (timer_pending(&fd_timer))
1875 pr_info("fd_timer.function=%p\n", fd_timer.function);
1876 if (timer_pending(&fd_timeout)) {
1877 pr_info("timer_function=%p\n", fd_timeout.function);
1878 pr_info("expires=%lu\n", fd_timeout.expires - jiffies);
1879 pr_info("now=%lu\n", jiffies);
1881 pr_info("cont=%p\n", cont);
1882 pr_info("current_req=%p\n", current_req);
1883 pr_info("command_status=%d\n", command_status);
1887 static void floppy_shutdown(unsigned long data)
1889 unsigned long flags;
1895 floppy_enable_hlt();
1897 flags = claim_dma_lock();
1899 release_dma_lock(flags);
1901 /* avoid dma going to a random drive after shutdown */
1904 DPRINT("floppy timeout called\n");
1908 cont->redo(); /* this will recall reset when needed */
1910 pr_info("no cont in shutdown!\n");
1911 process_fd_request();
1913 is_alive("floppy shutdown");
1916 /* start motor, check media-changed condition and write protection */
1917 static int start_motor(void (*function)(void))
1923 data = UNIT(current_drive);
1924 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) {
1925 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) {
1927 /* no read since this drive is running */
1928 DRS->first_read_date = 0;
1929 /* note motor start time if motor is not yet running */
1930 DRS->spinup_date = jiffies;
1931 data |= (0x10 << UNIT(current_drive));
1933 } else if (FDCS->dor & (0x10 << UNIT(current_drive)))
1934 mask &= ~(0x10 << UNIT(current_drive));
1936 /* starts motor and selects floppy */
1937 del_timer(motor_off_timer + current_drive);
1938 set_dor(fdc, mask, data);
1940 /* wait_for_completion also schedules reset if needed. */
1941 return fd_wait_for_completion(DRS->select_date + DP->select_delay,
1942 (timeout_fn)function);
1945 static void floppy_ready(void)
1951 if (start_motor(floppy_ready))
1956 debug_dcl(DP->flags, "calling disk change from floppy_ready\n");
1957 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
1958 disk_change(current_drive) && !DP->select_delay)
1959 twaddle(); /* this clears the dcl on certain
1960 * drive/controller combinations */
1962 #ifdef fd_chose_dma_mode
1963 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) {
1964 unsigned long flags = claim_dma_lock();
1965 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length);
1966 release_dma_lock(flags);
1970 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) {
1971 perpendicular_mode();
1972 fdc_specify(); /* must be done here because of hut, hlt ... */
1975 if ((raw_cmd->flags & FD_RAW_READ) ||
1976 (raw_cmd->flags & FD_RAW_WRITE))
1982 static void floppy_start(void)
1984 reschedule_timeout(current_reqD, "floppy start", 0);
1987 debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n");
1988 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
1993 * ========================================================================
1994 * here ends the bottom half. Exported routines are:
1995 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
1996 * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
1997 * Initialization also uses output_byte, result, set_dor, floppy_interrupt
1999 * ========================================================================
2002 * General purpose continuations.
2003 * ==============================
2006 static void do_wakeup(void)
2008 reschedule_timeout(MAXTIMEOUT, "do wakeup", 0);
2010 command_status += 2;
2011 wake_up(&command_done);
2014 static struct cont_t wakeup_cont = {
2018 .done = (done_f)empty
2021 static struct cont_t intr_cont = {
2023 .redo = process_fd_request,
2025 .done = (done_f)empty
2028 static int wait_til_done(void (*handler)(void), int interruptible)
2032 schedule_bh(handler);
2034 if (command_status < 2 && NO_SIGNAL) {
2035 DECLARE_WAITQUEUE(wait, current);
2037 add_wait_queue(&command_done, &wait);
2039 set_current_state(interruptible ?
2040 TASK_INTERRUPTIBLE :
2041 TASK_UNINTERRUPTIBLE);
2043 if (command_status >= 2 || !NO_SIGNAL)
2046 is_alive("wait_til_done");
2050 set_current_state(TASK_RUNNING);
2051 remove_wait_queue(&command_done, &wait);
2054 if (command_status < 2) {
2062 command_status = FD_COMMAND_ERROR;
2063 if (command_status == FD_COMMAND_OKAY)
2067 command_status = FD_COMMAND_NONE;
2071 static void generic_done(int result)
2073 command_status = result;
2074 cont = &wakeup_cont;
2077 static void generic_success(void)
2082 static void generic_failure(void)
2087 static void success_and_wakeup(void)
2094 * formatting and rw support.
2095 * ==========================
2098 static int next_valid_format(void)
2102 probed_format = DRS->probed_format;
2104 if (probed_format >= 8 || !DP->autodetect[probed_format]) {
2105 DRS->probed_format = 0;
2108 if (floppy_type[DP->autodetect[probed_format]].sect) {
2109 DRS->probed_format = probed_format;
2116 static void bad_flp_intr(void)
2121 DRS->probed_format++;
2122 if (!next_valid_format())
2125 err_count = ++(*errors);
2126 INFBOUND(DRWE->badness, err_count);
2127 if (err_count > DP->max_errors.abort)
2129 if (err_count > DP->max_errors.reset)
2131 else if (err_count > DP->max_errors.recal)
2132 DRS->track = NEED_2_RECAL;
2135 static void set_floppy(int drive)
2137 int type = ITYPE(UDRS->fd_device);
2140 _floppy = floppy_type + type;
2142 _floppy = current_type[drive];
2146 * formatting support.
2147 * ===================
2149 static void format_interrupt(void)
2151 switch (interpret_errors()) {
2162 #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2)
2163 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1))
2164 #define CT(x) ((x) | 0xc0)
2166 static void setup_format_params(int track)
2174 unsigned char track, head, sect, size;
2175 } *here = (struct fparm *)floppy_track_buffer;
2177 raw_cmd = &default_raw_cmd;
2178 raw_cmd->track = track;
2180 raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
2181 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK);
2182 raw_cmd->rate = _floppy->rate & 0x43;
2183 raw_cmd->cmd_count = NR_F;
2184 COMMAND = FM_MODE(_floppy, FD_FORMAT);
2185 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head);
2186 F_SIZECODE = FD_SIZECODE(_floppy);
2187 F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE;
2188 F_GAP = _floppy->fmt_gap;
2189 F_FILL = FD_FILL_BYTE;
2191 raw_cmd->kernel_data = floppy_track_buffer;
2192 raw_cmd->length = 4 * F_SECT_PER_TRACK;
2194 /* allow for about 30ms for data transport per track */
2195 head_shift = (F_SECT_PER_TRACK + 5) / 6;
2197 /* a ``cylinder'' is two tracks plus a little stepping time */
2198 track_shift = 2 * head_shift + 3;
2200 /* position of logical sector 1 on this track */
2201 n = (track_shift * format_req.track + head_shift * format_req.head)
2204 /* determine interleave */
2206 if (_floppy->fmt_gap < 0x22)
2209 /* initialize field */
2210 for (count = 0; count < F_SECT_PER_TRACK; ++count) {
2211 here[count].track = format_req.track;
2212 here[count].head = format_req.head;
2213 here[count].sect = 0;
2214 here[count].size = F_SIZECODE;
2216 /* place logical sectors */
2217 for (count = 1; count <= F_SECT_PER_TRACK; ++count) {
2218 here[n].sect = count;
2219 n = (n + il) % F_SECT_PER_TRACK;
2220 if (here[n].sect) { /* sector busy, find next free sector */
2222 if (n >= F_SECT_PER_TRACK) {
2223 n -= F_SECT_PER_TRACK;
2224 while (here[n].sect)
2229 if (_floppy->stretch & FD_SECTBASEMASK) {
2230 for (count = 0; count < F_SECT_PER_TRACK; count++)
2231 here[count].sect += FD_SECTBASE(_floppy) - 1;
2235 static void redo_format(void)
2238 setup_format_params(format_req.track << STRETCH(_floppy));
2240 debugt("queue format request");
2243 static struct cont_t format_cont = {
2244 .interrupt = format_interrupt,
2245 .redo = redo_format,
2246 .error = bad_flp_intr,
2247 .done = generic_done
2250 static int do_format(int drive, struct format_descr *tmp_format_req)
2254 if (lock_fdc(drive, 1))
2259 _floppy->track > DP->tracks ||
2260 tmp_format_req->track >= _floppy->track ||
2261 tmp_format_req->head >= _floppy->head ||
2262 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
2263 !_floppy->fmt_gap) {
2264 process_fd_request();
2267 format_req = *tmp_format_req;
2269 cont = &format_cont;
2270 errors = &format_errors;
2272 process_fd_request();
2277 * Buffer read/write and support
2278 * =============================
2281 static void floppy_end_request(struct request *req, int error)
2283 unsigned int nr_sectors = current_count_sectors;
2284 unsigned int drive = (unsigned long)req->rq_disk->private_data;
2286 /* current_count_sectors can be zero if transfer failed */
2288 nr_sectors = blk_rq_cur_sectors(req);
2289 if (__blk_end_request(req, error, nr_sectors << 9))
2292 /* We're done with the request */
2297 /* new request_done. Can handle physical sectors which are smaller than a
2299 static void request_done(int uptodate)
2301 struct request_queue *q = floppy_queue;
2302 struct request *req = current_req;
2303 unsigned long flags;
2307 reschedule_timeout(MAXTIMEOUT, "request done", uptodate);
2310 pr_info("floppy.c: no request in request_done\n");
2315 /* maintain values for invalidation on geometry
2317 block = current_count_sectors + blk_rq_pos(req);
2318 INFBOUND(DRS->maxblock, block);
2319 if (block > _floppy->sect)
2322 /* unlock chained buffers */
2323 spin_lock_irqsave(q->queue_lock, flags);
2324 floppy_end_request(req, 0);
2325 spin_unlock_irqrestore(q->queue_lock, flags);
2327 if (rq_data_dir(req) == WRITE) {
2328 /* record write error information */
2329 DRWE->write_errors++;
2330 if (DRWE->write_errors == 1) {
2331 DRWE->first_error_sector = blk_rq_pos(req);
2332 DRWE->first_error_generation = DRS->generation;
2334 DRWE->last_error_sector = blk_rq_pos(req);
2335 DRWE->last_error_generation = DRS->generation;
2337 spin_lock_irqsave(q->queue_lock, flags);
2338 floppy_end_request(req, -EIO);
2339 spin_unlock_irqrestore(q->queue_lock, flags);
2343 /* Interrupt handler evaluating the result of the r/w operation */
2344 static void rw_interrupt(void)
2352 /* some Toshiba floppy controllers occasionnally seem to
2353 * return bogus interrupts after read/write operations, which
2354 * can be recognized by a bad head number (>= 2) */
2358 if (!DRS->first_read_date)
2359 DRS->first_read_date = jiffies;
2374 nr_sectors = (((R_TRACK - TRACK) * heads +
2375 R_HEAD - HEAD) * SECT_PER_TRACK +
2376 R_SECTOR - SECTOR + eoc) << SIZECODE >> 2;
2378 #ifdef FLOPPY_SANITY_CHECK
2379 if (nr_sectors / ssize >
2380 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) {
2381 DPRINT("long rw: %x instead of %lx\n",
2382 nr_sectors, current_count_sectors);
2383 pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR);
2384 pr_info("rh=%d h=%d\n", R_HEAD, HEAD);
2385 pr_info("rt=%d t=%d\n", R_TRACK, TRACK);
2386 pr_info("heads=%d eoc=%d\n", heads, eoc);
2387 pr_info("spt=%d st=%d ss=%d\n",
2388 SECT_PER_TRACK, fsector_t, ssize);
2389 pr_info("in_sector_offset=%d\n", in_sector_offset);
2393 nr_sectors -= in_sector_offset;
2394 INFBOUND(nr_sectors, 0);
2395 SUPBOUND(current_count_sectors, nr_sectors);
2397 switch (interpret_errors()) {
2402 if (!current_count_sectors) {
2409 if (!current_count_sectors) {
2413 current_type[current_drive] = _floppy;
2414 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2419 if (DP->flags & FTD_MSG)
2420 DPRINT("Auto-detected floppy type %s in fd%d\n",
2421 _floppy->name, current_drive);
2422 current_type[current_drive] = _floppy;
2423 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2427 if (CT(COMMAND) != FD_READ ||
2428 raw_cmd->kernel_data == current_req->buffer) {
2429 /* transfer directly from buffer */
2431 } else if (CT(COMMAND) == FD_READ) {
2432 buffer_track = raw_cmd->track;
2433 buffer_drive = current_drive;
2434 INFBOUND(buffer_max, nr_sectors + fsector_t);
2439 /* Compute maximal contiguous buffer size. */
2440 static int buffer_chain_size(void)
2444 struct req_iterator iter;
2447 base = bio_data(current_req->bio);
2450 rq_for_each_segment(bv, current_req, iter) {
2451 if (page_address(bv->bv_page) + bv->bv_offset != base + size)
2460 /* Compute the maximal transfer size */
2461 static int transfer_size(int ssize, int max_sector, int max_size)
2463 SUPBOUND(max_sector, fsector_t + max_size);
2466 max_sector -= (max_sector % _floppy->sect) % ssize;
2468 /* transfer size, beginning not aligned */
2469 current_count_sectors = max_sector - fsector_t;
2475 * Move data from/to the track buffer to/from the buffer cache.
2477 static void copy_buffer(int ssize, int max_sector, int max_sector_2)
2479 int remaining; /* number of transferred 512-byte sectors */
2484 struct req_iterator iter;
2486 max_sector = transfer_size(ssize,
2487 min(max_sector, max_sector_2),
2488 blk_rq_sectors(current_req));
2490 if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
2491 buffer_max > fsector_t + blk_rq_sectors(current_req))
2492 current_count_sectors = min_t(int, buffer_max - fsector_t,
2493 blk_rq_sectors(current_req));
2495 remaining = current_count_sectors << 9;
2496 #ifdef FLOPPY_SANITY_CHECK
2497 if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) {
2498 DPRINT("in copy buffer\n");
2499 pr_info("current_count_sectors=%ld\n", current_count_sectors);
2500 pr_info("remaining=%d\n", remaining >> 9);
2501 pr_info("current_req->nr_sectors=%u\n",
2502 blk_rq_sectors(current_req));
2503 pr_info("current_req->current_nr_sectors=%u\n",
2504 blk_rq_cur_sectors(current_req));
2505 pr_info("max_sector=%d\n", max_sector);
2506 pr_info("ssize=%d\n", ssize);
2510 buffer_max = max(max_sector, buffer_max);
2512 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
2514 size = blk_rq_cur_bytes(current_req);
2516 rq_for_each_segment(bv, current_req, iter) {
2521 SUPBOUND(size, remaining);
2523 buffer = page_address(bv->bv_page) + bv->bv_offset;
2524 #ifdef FLOPPY_SANITY_CHECK
2525 if (dma_buffer + size >
2526 floppy_track_buffer + (max_buffer_sectors << 10) ||
2527 dma_buffer < floppy_track_buffer) {
2528 DPRINT("buffer overrun in copy buffer %d\n",
2529 (int)((floppy_track_buffer - dma_buffer) >> 9));
2530 pr_info("fsector_t=%d buffer_min=%d\n",
2531 fsector_t, buffer_min);
2532 pr_info("current_count_sectors=%ld\n",
2533 current_count_sectors);
2534 if (CT(COMMAND) == FD_READ)
2536 if (CT(COMMAND) == FD_WRITE)
2540 if (((unsigned long)buffer) % 512)
2541 DPRINT("%p buffer not aligned\n", buffer);
2543 if (CT(COMMAND) == FD_READ)
2544 memcpy(buffer, dma_buffer, size);
2546 memcpy(dma_buffer, buffer, size);
2551 #ifdef FLOPPY_SANITY_CHECK
2554 max_sector -= remaining >> 9;
2555 DPRINT("weirdness: remaining %d\n", remaining >> 9);
2560 /* work around a bug in pseudo DMA
2561 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2562 * sending data. Hence we need a different way to signal the
2563 * transfer length: We use SECT_PER_TRACK. Unfortunately, this
2564 * does not work with MT, hence we can only transfer one head at
2567 static void virtualdmabug_workaround(void)
2572 if (CT(COMMAND) == FD_WRITE) {
2573 COMMAND &= ~0x80; /* switch off multiple track mode */
2575 hard_sectors = raw_cmd->length >> (7 + SIZECODE);
2576 end_sector = SECTOR + hard_sectors - 1;
2577 #ifdef FLOPPY_SANITY_CHECK
2578 if (end_sector > SECT_PER_TRACK) {
2579 pr_info("too many sectors %d > %d\n",
2580 end_sector, SECT_PER_TRACK);
2584 SECT_PER_TRACK = end_sector;
2585 /* make sure SECT_PER_TRACK
2586 * points to end of transfer */
2591 * Formulate a read/write request.
2592 * this routine decides where to load the data (directly to buffer, or to
2593 * tmp floppy area), how much data to load (the size of the buffer, the whole
2594 * track, or a single sector)
2595 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2596 * allocation on the fly, it should be done here. No other part should need
2600 static int make_raw_rw_request(void)
2602 int aligned_sector_t;
2608 if (max_buffer_sectors == 0) {
2609 pr_info("VFS: Block I/O scheduled on unopened device\n");
2613 set_fdc((long)current_req->rq_disk->private_data);
2615 raw_cmd = &default_raw_cmd;
2616 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK |
2618 raw_cmd->cmd_count = NR_RW;
2619 if (rq_data_dir(current_req) == READ) {
2620 raw_cmd->flags |= FD_RAW_READ;
2621 COMMAND = FM_MODE(_floppy, FD_READ);
2622 } else if (rq_data_dir(current_req) == WRITE) {
2623 raw_cmd->flags |= FD_RAW_WRITE;
2624 COMMAND = FM_MODE(_floppy, FD_WRITE);
2626 DPRINT("make_raw_rw_request: unknown command\n");
2630 max_sector = _floppy->sect * _floppy->head;
2632 TRACK = (int)blk_rq_pos(current_req) / max_sector;
2633 fsector_t = (int)blk_rq_pos(current_req) % max_sector;
2634 if (_floppy->track && TRACK >= _floppy->track) {
2635 if (blk_rq_cur_sectors(current_req) & 1) {
2636 current_count_sectors = 1;
2641 HEAD = fsector_t / _floppy->sect;
2643 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) ||
2644 test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) &&
2645 fsector_t < _floppy->sect)
2646 max_sector = _floppy->sect;
2648 /* 2M disks have phantom sectors on the first track */
2649 if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) {
2650 max_sector = 2 * _floppy->sect / 3;
2651 if (fsector_t >= max_sector) {
2652 current_count_sectors =
2653 min_t(int, _floppy->sect - fsector_t,
2654 blk_rq_sectors(current_req));
2659 SIZECODE = FD_SIZECODE(_floppy);
2660 raw_cmd->rate = _floppy->rate & 0x43;
2661 if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2)
2668 raw_cmd->track = TRACK << STRETCH(_floppy);
2669 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD);
2672 SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
2673 SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) +
2674 FD_SECTBASE(_floppy);
2676 /* tracksize describes the size which can be filled up with sectors
2679 tracksize = _floppy->sect - _floppy->sect % ssize;
2680 if (tracksize < _floppy->sect) {
2682 if (tracksize <= fsector_t % _floppy->sect)
2685 /* if we are beyond tracksize, fill up using smaller sectors */
2686 while (tracksize <= fsector_t % _floppy->sect) {
2687 while (tracksize + ssize > _floppy->sect) {
2695 max_sector = HEAD * _floppy->sect + tracksize;
2696 } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) {
2697 max_sector = _floppy->sect;
2698 } else if (!HEAD && CT(COMMAND) == FD_WRITE) {
2699 /* for virtual DMA bug workaround */
2700 max_sector = _floppy->sect;
2703 in_sector_offset = (fsector_t % _floppy->sect) % ssize;
2704 aligned_sector_t = fsector_t - in_sector_offset;
2705 max_size = blk_rq_sectors(current_req);
2706 if ((raw_cmd->track == buffer_track) &&
2707 (current_drive == buffer_drive) &&
2708 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
2709 /* data already in track buffer */
2710 if (CT(COMMAND) == FD_READ) {
2711 copy_buffer(1, max_sector, buffer_max);
2714 } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) {
2715 if (CT(COMMAND) == FD_WRITE) {
2716 unsigned int sectors;
2718 sectors = fsector_t + blk_rq_sectors(current_req);
2719 if (sectors > ssize && sectors < ssize + ssize)
2720 max_size = ssize + ssize;
2724 raw_cmd->flags &= ~FD_RAW_WRITE;
2725 raw_cmd->flags |= FD_RAW_READ;
2726 COMMAND = FM_MODE(_floppy, FD_READ);
2727 } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) {
2728 unsigned long dma_limit;
2729 int direct, indirect;
2732 transfer_size(ssize, max_sector,
2733 max_buffer_sectors * 2) - fsector_t;
2736 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2737 * on a 64 bit machine!
2739 max_size = buffer_chain_size();
2740 dma_limit = (MAX_DMA_ADDRESS -
2741 ((unsigned long)current_req->buffer)) >> 9;
2742 if ((unsigned long)max_size > dma_limit)
2743 max_size = dma_limit;
2744 /* 64 kb boundaries */
2745 if (CROSS_64KB(current_req->buffer, max_size << 9))
2747 ((unsigned long)current_req->buffer) %
2749 direct = transfer_size(ssize, max_sector, max_size) - fsector_t;
2751 * We try to read tracks, but if we get too many errors, we
2752 * go back to reading just one sector at a time.
2754 * This means we should be able to read a sector even if there
2755 * are other bad sectors on this track.
2758 (indirect * 2 > direct * 3 &&
2759 *errors < DP->max_errors.read_track &&
2761 (DP->read_track & (1 << DRS->probed_format)))))) {
2762 max_size = blk_rq_sectors(current_req);
2764 raw_cmd->kernel_data = current_req->buffer;
2765 raw_cmd->length = current_count_sectors << 9;
2766 if (raw_cmd->length == 0) {
2767 DPRINT("zero dma transfer attempted from make_raw_request\n");
2768 DPRINT("indirect=%d direct=%d fsector_t=%d\n",
2769 indirect, direct, fsector_t);
2772 virtualdmabug_workaround();
2777 if (CT(COMMAND) == FD_READ)
2778 max_size = max_sector; /* unbounded */
2780 /* claim buffer track if needed */
2781 if (buffer_track != raw_cmd->track || /* bad track */
2782 buffer_drive != current_drive || /* bad drive */
2783 fsector_t > buffer_max ||
2784 fsector_t < buffer_min ||
2785 ((CT(COMMAND) == FD_READ ||
2786 (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) &&
2787 max_sector > 2 * max_buffer_sectors + buffer_min &&
2788 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) {
2789 /* not enough space */
2791 buffer_drive = current_drive;
2792 buffer_max = buffer_min = aligned_sector_t;
2794 raw_cmd->kernel_data = floppy_track_buffer +
2795 ((aligned_sector_t - buffer_min) << 9);
2797 if (CT(COMMAND) == FD_WRITE) {
2798 /* copy write buffer to track buffer.
2799 * if we get here, we know that the write
2800 * is either aligned or the data already in the buffer
2801 * (buffer will be overwritten) */
2802 #ifdef FLOPPY_SANITY_CHECK
2803 if (in_sector_offset && buffer_track == -1)
2804 DPRINT("internal error offset !=0 on write\n");
2806 buffer_track = raw_cmd->track;
2807 buffer_drive = current_drive;
2808 copy_buffer(ssize, max_sector,
2809 2 * max_buffer_sectors + buffer_min);
2811 transfer_size(ssize, max_sector,
2812 2 * max_buffer_sectors + buffer_min -
2815 /* round up current_count_sectors to get dma xfer size */
2816 raw_cmd->length = in_sector_offset + current_count_sectors;
2817 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1;
2818 raw_cmd->length <<= 9;
2819 #ifdef FLOPPY_SANITY_CHECK
2820 if ((raw_cmd->length < current_count_sectors << 9) ||
2821 (raw_cmd->kernel_data != current_req->buffer &&
2822 CT(COMMAND) == FD_WRITE &&
2823 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
2824 aligned_sector_t < buffer_min)) ||
2825 raw_cmd->length % (128 << SIZECODE) ||
2826 raw_cmd->length <= 0 || current_count_sectors <= 0) {
2827 DPRINT("fractionary current count b=%lx s=%lx\n",
2828 raw_cmd->length, current_count_sectors);
2829 if (raw_cmd->kernel_data != current_req->buffer)
2830 pr_info("addr=%d, length=%ld\n",
2831 (int)((raw_cmd->kernel_data -
2832 floppy_track_buffer) >> 9),
2833 current_count_sectors);
2834 pr_info("st=%d ast=%d mse=%d msi=%d\n",
2835 fsector_t, aligned_sector_t, max_sector, max_size);
2836 pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE);
2837 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2838 COMMAND, SECTOR, HEAD, TRACK);
2839 pr_info("buffer drive=%d\n", buffer_drive);
2840 pr_info("buffer track=%d\n", buffer_track);
2841 pr_info("buffer_min=%d\n", buffer_min);
2842 pr_info("buffer_max=%d\n", buffer_max);
2846 if (raw_cmd->kernel_data != current_req->buffer) {
2847 if (raw_cmd->kernel_data < floppy_track_buffer ||
2848 current_count_sectors < 0 ||
2849 raw_cmd->length < 0 ||
2850 raw_cmd->kernel_data + raw_cmd->length >
2851 floppy_track_buffer + (max_buffer_sectors << 10)) {
2852 DPRINT("buffer overrun in schedule dma\n");
2853 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n",
2854 fsector_t, buffer_min, raw_cmd->length >> 9);
2855 pr_info("current_count_sectors=%ld\n",
2856 current_count_sectors);
2857 if (CT(COMMAND) == FD_READ)
2859 if (CT(COMMAND) == FD_WRITE)
2863 } else if (raw_cmd->length > blk_rq_bytes(current_req) ||
2864 current_count_sectors > blk_rq_sectors(current_req)) {
2865 DPRINT("buffer overrun in direct transfer\n");
2867 } else if (raw_cmd->length < current_count_sectors << 9) {
2868 DPRINT("more sectors than bytes\n");
2869 pr_info("bytes=%ld\n", raw_cmd->length >> 9);
2870 pr_info("sectors=%ld\n", current_count_sectors);
2872 if (raw_cmd->length == 0) {
2873 DPRINT("zero dma transfer attempted from make_raw_request\n");
2878 virtualdmabug_workaround();
2882 static void redo_fd_request(void)
2884 #define REPEAT {request_done(0); continue; }
2889 if (current_drive < N_DRIVE)
2890 floppy_off(current_drive);
2894 struct request *req;
2896 spin_lock_irq(floppy_queue->queue_lock);
2897 req = blk_fetch_request(floppy_queue);
2898 spin_unlock_irq(floppy_queue->queue_lock);
2906 drive = (long)current_req->rq_disk->private_data;
2908 reschedule_timeout(current_reqD, "redo fd request", 0);
2911 raw_cmd = &default_raw_cmd;
2913 if (start_motor(redo_fd_request))
2915 disk_change(current_drive);
2916 if (test_bit(current_drive, &fake_change) ||
2917 test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) {
2918 DPRINT("disk absent or changed during operation\n");
2921 if (!_floppy) { /* Autodetection */
2923 DRS->probed_format = 0;
2924 if (next_valid_format()) {
2925 DPRINT("no autodetectable formats\n");
2932 floppy_type + DP->autodetect[DRS->probed_format];
2935 errors = &(current_req->errors);
2936 tmp = make_raw_rw_request();
2942 if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags))
2944 schedule_bh(floppy_start);
2945 debugt("queue fd request");
2951 static struct cont_t rw_cont = {
2952 .interrupt = rw_interrupt,
2953 .redo = redo_fd_request,
2954 .error = bad_flp_intr,
2955 .done = request_done
2958 static void process_fd_request(void)
2961 schedule_bh(redo_fd_request);
2964 static void do_fd_request(struct request_queue *q)
2966 if (max_buffer_sectors == 0) {
2967 pr_info("VFS: do_fd_request called on non-open device\n");
2971 if (usage_count == 0) {
2972 pr_info("warning: usage count=0, current_req=%p exiting\n",
2974 pr_info("sect=%ld type=%x flags=%x\n",
2975 (long)blk_rq_pos(current_req), current_req->cmd_type,
2976 current_req->cmd_flags);
2979 if (test_bit(0, &fdc_busy)) {
2980 /* fdc busy, this new request will be treated when the
2981 current one is done */
2982 is_alive("do fd request, old request running");
2985 lock_fdc(MAXTIMEOUT, 0);
2986 process_fd_request();
2987 is_alive("do fd request");
2990 static struct cont_t poll_cont = {
2991 .interrupt = success_and_wakeup,
2992 .redo = floppy_ready,
2993 .error = generic_failure,
2994 .done = generic_done
2997 static int poll_drive(int interruptible, int flag)
3001 /* no auto-sense, just clear dcl */
3002 raw_cmd = &default_raw_cmd;
3003 raw_cmd->flags = flag;
3005 raw_cmd->cmd_count = 0;
3007 debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n");
3008 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
3014 * User triggered reset
3015 * ====================
3018 static void reset_intr(void)
3020 pr_info("weird, reset interrupt called\n");
3023 static struct cont_t reset_cont = {
3024 .interrupt = reset_intr,
3025 .redo = success_and_wakeup,
3026 .error = generic_failure,
3027 .done = generic_done
3030 static int user_reset_fdc(int drive, int arg, int interruptible)
3034 if (lock_fdc(drive, interruptible))
3037 if (arg == FD_RESET_ALWAYS)
3043 process_fd_request();
3048 * Misc Ioctl's and support
3049 * ========================
3051 static inline int fd_copyout(void __user *param, const void *address,
3054 return copy_to_user(param, address, size) ? -EFAULT : 0;
3057 static inline int fd_copyin(void __user *param, void *address,
3060 return copy_from_user(address, param, size) ? -EFAULT : 0;
3063 static inline const char *drive_name(int type, int drive)
3065 struct floppy_struct *floppy;
3068 floppy = floppy_type + type;
3070 if (UDP->native_format)
3071 floppy = floppy_type + UDP->native_format;
3076 return floppy->name;
3082 static void raw_cmd_done(int flag)
3087 raw_cmd->flags |= FD_RAW_FAILURE;
3088 raw_cmd->flags |= FD_RAW_HARDFAILURE;
3090 raw_cmd->reply_count = inr;
3091 if (raw_cmd->reply_count > MAX_REPLIES)
3092 raw_cmd->reply_count = 0;
3093 for (i = 0; i < raw_cmd->reply_count; i++)
3094 raw_cmd->reply[i] = reply_buffer[i];
3096 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3097 unsigned long flags;
3098 flags = claim_dma_lock();
3099 raw_cmd->length = fd_get_dma_residue();
3100 release_dma_lock(flags);
3103 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
3104 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
3105 raw_cmd->flags |= FD_RAW_FAILURE;
3107 if (disk_change(current_drive))
3108 raw_cmd->flags |= FD_RAW_DISK_CHANGE;
3110 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
3111 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
3112 motor_off_callback(current_drive);
3114 if (raw_cmd->next &&
3115 (!(raw_cmd->flags & FD_RAW_FAILURE) ||
3116 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
3117 ((raw_cmd->flags & FD_RAW_FAILURE) ||
3118 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) {
3119 raw_cmd = raw_cmd->next;
3126 static struct cont_t raw_cmd_cont = {
3127 .interrupt = success_and_wakeup,
3128 .redo = floppy_start,
3129 .error = generic_failure,
3130 .done = raw_cmd_done
3133 static inline int raw_cmd_copyout(int cmd, char __user *param,
3134 struct floppy_raw_cmd *ptr)
3139 ret = copy_to_user((void __user *)param, ptr, sizeof(*ptr));
3142 param += sizeof(struct floppy_raw_cmd);
3143 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) {
3144 if (ptr->length >= 0 &&
3145 ptr->length <= ptr->buffer_length) {
3146 long length = ptr->buffer_length - ptr->length;
3147 ret = fd_copyout(ptr->data, ptr->kernel_data,
3158 static void raw_cmd_free(struct floppy_raw_cmd **ptr)
3160 struct floppy_raw_cmd *next;
3161 struct floppy_raw_cmd *this;
3166 if (this->buffer_length) {
3167 fd_dma_mem_free((unsigned long)this->kernel_data,
3168 this->buffer_length);
3169 this->buffer_length = 0;
3177 static inline int raw_cmd_copyin(int cmd, char __user *param,
3178 struct floppy_raw_cmd **rcmd)
3180 struct floppy_raw_cmd *ptr;
3186 ptr = (struct floppy_raw_cmd *)
3187 kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
3191 ret = copy_from_user(ptr, (void __user *)param, sizeof(*ptr));
3195 ptr->buffer_length = 0;
3196 param += sizeof(struct floppy_raw_cmd);
3197 if (ptr->cmd_count > 33)
3198 /* the command may now also take up the space
3199 * initially intended for the reply & the
3200 * reply count. Needed for long 82078 commands
3201 * such as RESTORE, which takes ... 17 command
3202 * bytes. Murphy's law #137: When you reserve
3203 * 16 bytes for a structure, you'll one day
3204 * discover that you really need 17...
3208 for (i = 0; i < 16; i++)
3210 ptr->resultcode = 0;
3211 ptr->kernel_data = NULL;
3213 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3214 if (ptr->length <= 0)
3217 (char *)fd_dma_mem_alloc(ptr->length);
3218 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
3219 if (!ptr->kernel_data)
3221 ptr->buffer_length = ptr->length;
3223 if (ptr->flags & FD_RAW_WRITE) {
3224 ret = fd_copyin(ptr->data, ptr->kernel_data,
3229 rcmd = &(ptr->next);
3230 if (!(ptr->flags & FD_RAW_MORE))
3236 static int raw_cmd_ioctl(int cmd, void __user *param)
3238 struct floppy_raw_cmd *my_raw_cmd;
3243 if (FDCS->rawcmd <= 1)
3245 for (drive = 0; drive < N_DRIVE; drive++) {
3246 if (FDC(drive) != fdc)
3248 if (drive == current_drive) {
3249 if (UDRS->fd_ref > 1) {
3253 } else if (UDRS->fd_ref) {
3262 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
3264 raw_cmd_free(&my_raw_cmd);
3268 raw_cmd = my_raw_cmd;
3269 cont = &raw_cmd_cont;
3270 ret = wait_til_done(floppy_start, 1);
3271 debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n");
3273 if (ret != -EINTR && FDCS->reset)
3276 DRS->track = NO_TRACK;
3278 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
3281 raw_cmd_free(&my_raw_cmd);
3285 static int invalidate_drive(struct block_device *bdev)
3287 /* invalidate the buffer track to force a reread */
3288 set_bit((long)bdev->bd_disk->private_data, &fake_change);
3289 process_fd_request();
3290 check_disk_change(bdev);
3294 static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
3295 int drive, int type, struct block_device *bdev)
3299 /* sanity checking for parameters. */
3302 g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) ||
3303 /* check if reserved bits are set */
3304 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0)
3307 if (!capable(CAP_SYS_ADMIN))
3309 mutex_lock(&open_lock);
3310 if (lock_fdc(drive, 1)) {
3311 mutex_unlock(&open_lock);
3314 floppy_type[type] = *g;
3315 floppy_type[type].name = "user format";
3316 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
3317 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] =
3318 floppy_type[type].size + 1;
3319 process_fd_request();
3320 for (cnt = 0; cnt < N_DRIVE; cnt++) {
3321 struct block_device *bdev = opened_bdev[cnt];
3322 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
3324 __invalidate_device(bdev);
3326 mutex_unlock(&open_lock);
3330 if (lock_fdc(drive, 1))
3332 if (cmd != FDDEFPRM) {
3333 /* notice a disk change immediately, else
3334 * we lose our settings immediately*/
3335 if (poll_drive(1, FD_RAW_NEED_DISK) == -EINTR)
3338 oldStretch = g->stretch;
3339 user_params[drive] = *g;
3340 if (buffer_drive == drive)
3341 SUPBOUND(buffer_max, user_params[drive].sect);
3342 current_type[drive] = &user_params[drive];
3343 floppy_sizes[drive] = user_params[drive].size;
3344 if (cmd == FDDEFPRM)
3345 DRS->keep_data = -1;
3348 /* invalidation. Invalidate only when needed, i.e.
3349 * when there are already sectors in the buffer cache
3350 * whose number will change. This is useful, because
3351 * mtools often changes the geometry of the disk after
3352 * looking at the boot block */
3353 if (DRS->maxblock > user_params[drive].sect ||
3355 ((user_params[drive].sect ^ oldStretch) &
3356 (FD_SWAPSIDES | FD_SECTBASEMASK)))
3357 invalidate_drive(bdev);
3359 process_fd_request();
3364 /* handle obsolete ioctl's */
3365 static int ioctl_table[] = {
3393 static inline int normalize_ioctl(int *cmd, int *size)
3397 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) {
3398 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) {
3399 *size = _IOC_SIZE(*cmd);
3400 *cmd = ioctl_table[i];
3401 if (*size > _IOC_SIZE(*cmd)) {
3402 pr_info("ioctl not yet supported\n");
3411 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
3414 *g = &floppy_type[type];
3416 if (lock_fdc(drive, 0))
3418 if (poll_drive(0, 0) == -EINTR)
3420 process_fd_request();
3421 *g = current_type[drive];
3428 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
3430 int drive = (long)bdev->bd_disk->private_data;
3431 int type = ITYPE(drive_state[drive].fd_device);
3432 struct floppy_struct *g;
3435 ret = get_floppy_geometry(drive, type, &g);
3439 geo->heads = g->head;
3440 geo->sectors = g->sect;
3441 geo->cylinders = g->track;
3445 static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3446 unsigned long param)
3448 #define FD_IOCTL_ALLOWED (mode & (FMODE_WRITE|FMODE_WRITE_IOCTL))
3450 int drive = (long)bdev->bd_disk->private_data;
3451 int type = ITYPE(UDRS->fd_device);
3456 struct floppy_struct g; /* geometry */
3457 struct format_descr f;
3458 struct floppy_max_errors max_errors;
3459 struct floppy_drive_params dp;
3460 } inparam; /* parameters coming from user space */
3461 const char *outparam; /* parameters passed back to user space */
3463 /* convert compatibility eject ioctls into floppy eject ioctl.
3464 * We do this in order to provide a means to eject floppy disks before
3465 * installing the new fdutils package */
3466 if (cmd == CDROMEJECT || /* CD-ROM eject */
3467 cmd == 0x6470) { /* SunOS floppy eject */
3468 DPRINT("obsolete eject ioctl\n");
3469 DPRINT("please use floppycontrol --eject\n");
3473 if (!((cmd & 0xff00) == 0x0200))
3476 /* convert the old style command into a new style command */
3477 ret = normalize_ioctl(&cmd, &size);
3481 /* permission checks */
3482 if (((cmd & 0x40) && !FD_IOCTL_ALLOWED) ||
3483 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
3486 if (WARN_ON(size < 0 || size > sizeof(inparam)))
3490 memset(&inparam, 0, sizeof(inparam));
3491 if (_IOC_DIR(cmd) & _IOC_WRITE) {
3492 ret = fd_copyin((void __user *)param, &inparam, size);
3499 if (UDRS->fd_ref != 1)
3500 /* somebody else has this drive open */
3502 if (lock_fdc(drive, 1))
3505 /* do the actual eject. Fails on
3506 * non-Sparc architectures */
3507 ret = fd_eject(UNIT(drive));
3509 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
3510 set_bit(FD_VERIFY_BIT, &UDRS->flags);
3511 process_fd_request();
3514 if (lock_fdc(drive, 1))
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, drive, type, bdev);
3524 ret = get_floppy_geometry(drive, type,
3525 (struct floppy_struct **)
3531 UDP->flags |= FTD_MSG;
3534 UDP->flags &= ~FTD_MSG;
3537 if (lock_fdc(drive, 1))
3539 if (poll_drive(1, FD_RAW_NEED_DISK) == -EINTR)
3542 process_fd_request();
3543 if (ret & FD_VERIFY)
3545 if (!(ret & FD_DISK_WRITABLE))
3549 if (UDRS->fd_ref != 1)
3551 return do_format(drive, &inparam.f);
3554 if (lock_fdc(drive, 1))
3556 return invalidate_drive(bdev);
3557 case FDSETEMSGTRESH:
3558 UDP->max_errors.reporting = (unsigned short)(param & 0x0f);
3561 outparam = (const char *)&UDP->max_errors;
3564 UDP->max_errors = inparam.max_errors;
3567 outparam = drive_name(type, drive);
3568 SUPBOUND(size, strlen(outparam) + 1);
3574 outparam = (const char *)UDP;
3577 if (lock_fdc(drive, 1))
3579 if (poll_drive(1, FD_RAW_NEED_DISK) == -EINTR)
3581 process_fd_request();
3584 outparam = (const char *)UDRS;
3587 return user_reset_fdc(drive, (int)param, 1);
3589 outparam = (const char *)UFDCS;
3592 memset(UDRWE, 0, sizeof(*UDRWE));
3595 outparam = (const char *)UDRWE;
3600 if (lock_fdc(drive, 1))
3603 i = raw_cmd_ioctl(cmd, (void __user *)param);
3606 process_fd_request();
3609 if (lock_fdc(drive, 1))
3612 process_fd_request();
3618 if (_IOC_DIR(cmd) & _IOC_READ)
3619 return fd_copyout((void __user *)param, outparam, size);
3624 static void __init config_types(void)
3626 bool has_drive = false;
3629 /* read drive info out of physical CMOS */
3632 UDP->cmos = FLOPPY0_TYPE;
3634 if (!UDP->cmos && FLOPPY1_TYPE)
3635 UDP->cmos = FLOPPY1_TYPE;
3637 /* FIXME: additional physical CMOS drive detection should go here */
3639 for (drive = 0; drive < N_DRIVE; drive++) {
3640 unsigned int type = UDP->cmos;
3641 struct floppy_drive_params *params;
3642 const char *name = NULL;
3643 static char temparea[32];
3645 if (type < ARRAY_SIZE(default_drive_params)) {
3646 params = &default_drive_params[type].params;
3648 name = default_drive_params[type].name;
3649 allowed_drive_mask |= 1 << drive;
3651 allowed_drive_mask &= ~(1 << drive);
3653 params = &default_drive_params[0].params;
3654 sprintf(temparea, "unknown type %d (usb?)", type);
3658 const char *prepend;
3662 pr_info("Floppy drive(s):");
3667 pr_cont("%s fd%d is %s", prepend, drive, name);
3676 static int floppy_release(struct gendisk *disk, fmode_t mode)
3678 int drive = (long)disk->private_data;
3680 mutex_lock(&open_lock);
3681 if (UDRS->fd_ref < 0)
3683 else if (!UDRS->fd_ref--) {
3684 DPRINT("floppy_release with fd_ref == 0");
3688 opened_bdev[drive] = NULL;
3689 mutex_unlock(&open_lock);
3695 * floppy_open check for aliasing (/dev/fd0 can be the same as
3696 * /dev/PS0 etc), and disallows simultaneous access to the same
3697 * drive with different device numbers.
3699 static int floppy_open(struct block_device *bdev, fmode_t mode)
3701 int drive = (long)bdev->bd_disk->private_data;
3702 int old_dev, new_dev;
3707 mutex_lock(&open_lock);
3708 old_dev = UDRS->fd_device;
3709 if (opened_bdev[drive] && opened_bdev[drive] != bdev)
3712 if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) {
3713 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
3714 set_bit(FD_VERIFY_BIT, &UDRS->flags);
3717 if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL)))
3720 if (mode & FMODE_EXCL)
3725 opened_bdev[drive] = bdev;
3729 if (!floppy_track_buffer) {
3730 /* if opening an ED drive, reserve a big buffer,
3731 * else reserve a small one */
3732 if ((UDP->cmos == 6) || (UDP->cmos == 5))
3733 try = 64; /* Only 48 actually useful */
3735 try = 32; /* Only 24 actually useful */
3737 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3738 if (!tmp && !floppy_track_buffer) {
3739 try >>= 1; /* buffer only one side */
3741 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3743 if (!tmp && !floppy_track_buffer)
3744 fallback_on_nodma_alloc(&tmp, 2048 * try);
3745 if (!tmp && !floppy_track_buffer) {
3746 DPRINT("Unable to allocate DMA memory\n");
3749 if (floppy_track_buffer) {
3751 fd_dma_mem_free((unsigned long)tmp, try * 1024);
3753 buffer_min = buffer_max = -1;
3754 floppy_track_buffer = tmp;
3755 max_buffer_sectors = try;
3759 new_dev = MINOR(bdev->bd_dev);
3760 UDRS->fd_device = new_dev;
3761 set_capacity(disks[drive], floppy_sizes[new_dev]);
3762 if (old_dev != -1 && old_dev != new_dev) {
3763 if (buffer_drive == drive)
3767 if (UFDCS->rawcmd == 1)
3770 if (!(mode & FMODE_NDELAY)) {
3771 if (mode & (FMODE_READ|FMODE_WRITE)) {
3772 UDRS->last_checked = 0;
3773 check_disk_change(bdev);
3774 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags))
3778 if ((mode & FMODE_WRITE) &&
3779 !test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags))
3782 mutex_unlock(&open_lock);
3785 if (UDRS->fd_ref < 0)
3790 opened_bdev[drive] = NULL;
3792 mutex_unlock(&open_lock);
3797 * Check if the disk has been changed or if a change has been faked.
3799 static int check_floppy_change(struct gendisk *disk)
3801 int drive = (long)disk->private_data;
3803 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
3804 test_bit(FD_VERIFY_BIT, &UDRS->flags))
3807 if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) {
3810 process_fd_request();
3813 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
3814 test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
3815 test_bit(drive, &fake_change) ||
3816 (!ITYPE(UDRS->fd_device) && !current_type[drive]))
3822 * This implements "read block 0" for floppy_revalidate().
3823 * Needed for format autodetection, checking whether there is
3824 * a disk in the drive, and whether that disk is writable.
3827 static void floppy_rb0_complete(struct bio *bio, int err)
3829 complete((struct completion *)bio->bi_private);
3832 static int __floppy_read_block_0(struct block_device *bdev)
3835 struct bio_vec bio_vec;
3836 struct completion complete;
3840 page = alloc_page(GFP_NOIO);
3842 process_fd_request();
3846 size = bdev->bd_block_size;
3851 bio.bi_io_vec = &bio_vec;
3852 bio_vec.bv_page = page;
3853 bio_vec.bv_len = size;
3854 bio_vec.bv_offset = 0;
3860 init_completion(&complete);
3861 bio.bi_private = &complete;
3862 bio.bi_end_io = floppy_rb0_complete;
3864 submit_bio(READ, &bio);
3865 generic_unplug_device(bdev_get_queue(bdev));
3866 process_fd_request();
3867 wait_for_completion(&complete);
3874 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
3875 * the bootblock (block 0). "Autodetection" is also needed to check whether
3876 * there is a disk in the drive at all... Thus we also do it for fixed
3877 * geometry formats */
3878 static int floppy_revalidate(struct gendisk *disk)
3880 int drive = (long)disk->private_data;
3881 #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device))
3885 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
3886 test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
3887 test_bit(drive, &fake_change) || NO_GEOM) {
3888 if (usage_count == 0) {
3889 pr_info("VFS: revalidate called on non-open device.\n");
3893 cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
3894 test_bit(FD_VERIFY_BIT, &UDRS->flags));
3895 if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)) {
3896 process_fd_request(); /*already done by another thread */
3901 if (buffer_drive == drive)
3903 clear_bit(drive, &fake_change);
3904 clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
3909 res = __floppy_read_block_0(opened_bdev[drive]);
3912 poll_drive(0, FD_RAW_NEED_DISK);
3913 process_fd_request();
3916 set_capacity(disk, floppy_sizes[UDRS->fd_device]);
3920 static const struct block_device_operations floppy_fops = {
3921 .owner = THIS_MODULE,
3922 .open = floppy_open,
3923 .release = floppy_release,
3924 .locked_ioctl = fd_ioctl,
3925 .getgeo = fd_getgeo,
3926 .media_changed = check_floppy_change,
3927 .revalidate_disk = floppy_revalidate,
3931 * Floppy Driver initialization
3932 * =============================
3935 /* Determine the floppy disk controller type */
3936 /* This routine was written by David C. Niemi */
3937 static char __init get_fdc_version(void)
3941 output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */
3946 return FDC_NONE; /* No FDC present ??? */
3947 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3948 pr_info("FDC %d is an 8272A\n", fdc);
3949 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
3952 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
3957 if (!fdc_configure()) {
3958 pr_info("FDC %d is an 82072\n", fdc);
3959 return FDC_82072; /* 82072 doesn't know CONFIGURE */
3962 output_byte(FD_PERPENDICULAR);
3963 if (need_more_output() == MORE_OUTPUT) {
3966 pr_info("FDC %d is an 82072A\n", fdc);
3967 return FDC_82072A; /* 82072A as found on Sparcs. */
3970 output_byte(FD_UNLOCK);
3972 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3973 pr_info("FDC %d is a pre-1991 82077\n", fdc);
3974 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
3977 if ((r != 1) || (reply_buffer[0] != 0x00)) {
3978 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
3982 output_byte(FD_PARTID);
3985 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
3989 if (reply_buffer[0] == 0x80) {
3990 pr_info("FDC %d is a post-1991 82077\n", fdc);
3991 return FDC_82077; /* Revised 82077AA passes all the tests */
3993 switch (reply_buffer[0] >> 5) {
3995 /* Either a 82078-1 or a 82078SL running at 5Volt */
3996 pr_info("FDC %d is an 82078.\n", fdc);
3999 pr_info("FDC %d is a 44pin 82078\n", fdc);
4002 pr_info("FDC %d is a S82078B\n", fdc);
4005 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc);
4008 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n",
4009 fdc, reply_buffer[0] >> 5);
4010 return FDC_82078_UNKN;
4012 } /* get_fdc_version */
4014 /* lilo configuration */
4016 static void __init floppy_set_flags(int *ints, int param, int param2)
4020 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4022 default_drive_params[i].params.flags |= param2;
4024 default_drive_params[i].params.flags &= ~param2;
4026 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param);
4029 static void __init daring(int *ints, int param, int param2)
4033 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4035 default_drive_params[i].params.select_delay = 0;
4036 default_drive_params[i].params.flags |=
4037 FD_SILENT_DCL_CLEAR;
4039 default_drive_params[i].params.select_delay =
4041 default_drive_params[i].params.flags &=
4042 ~FD_SILENT_DCL_CLEAR;
4045 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken");
4048 static void __init set_cmos(int *ints, int dummy, int dummy2)
4050 int current_drive = 0;
4053 DPRINT("wrong number of parameters for CMOS\n");
4056 current_drive = ints[1];
4057 if (current_drive < 0 || current_drive >= 8) {
4058 DPRINT("bad drive for set_cmos\n");
4062 if (current_drive >= 4 && !FDC2)
4066 DPRINT("setting CMOS code to %d\n", ints[2]);
4069 static struct param_table {
4071 void (*fn) (int *ints, int param, int param2);
4075 } config_params[] __initdata = {
4076 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4077 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4078 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0},
4079 {"irq", NULL, &FLOPPY_IRQ, 6, 0},
4080 {"dma", NULL, &FLOPPY_DMA, 2, 0},
4081 {"daring", daring, NULL, 1, 0},
4083 {"two_fdc", NULL, &FDC2, 0x370, 0},
4084 {"one_fdc", NULL, &FDC2, 0, 0},
4086 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL},
4087 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL},
4088 {"messages", floppy_set_flags, NULL, 1, FTD_MSG},
4089 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR},
4090 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG},
4091 {"nodma", NULL, &can_use_virtual_dma, 1, 0},
4092 {"omnibook", NULL, &can_use_virtual_dma, 1, 0},
4093 {"yesdma", NULL, &can_use_virtual_dma, 0, 0},
4094 {"fifo_depth", NULL, &fifo_depth, 0xa, 0},
4095 {"nofifo", NULL, &no_fifo, 0x20, 0},
4096 {"usefifo", NULL, &no_fifo, 0, 0},
4097 {"cmos", set_cmos, NULL, 0, 0},
4098 {"slow", NULL, &slow_floppy, 1, 0},
4099 {"unexpected_interrupts", NULL, &print_unex, 1, 0},
4100 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0},
4101 {"L40SX", NULL, &print_unex, 0, 0}
4106 static int __init floppy_setup(char *str)
4112 str = get_options(str, ARRAY_SIZE(ints), ints);
4114 for (i = 0; i < ARRAY_SIZE(config_params); i++) {
4115 if (strcmp(str, config_params[i].name) == 0) {
4119 param = config_params[i].def_param;
4120 if (config_params[i].fn)
4121 config_params[i].fn(ints, param,
4124 if (config_params[i].var) {
4125 DPRINT("%s=%d\n", str, param);
4126 *config_params[i].var = param;
4133 DPRINT("unknown floppy option [%s]\n", str);
4135 DPRINT("allowed options are:");
4136 for (i = 0; i < ARRAY_SIZE(config_params); i++)
4137 pr_cont(" %s", config_params[i].name);
4140 DPRINT("botched floppy option\n");
4141 DPRINT("Read Documentation/blockdev/floppy.txt\n");
4145 static int have_no_fdc = -ENODEV;
4147 static ssize_t floppy_cmos_show(struct device *dev,
4148 struct device_attribute *attr, char *buf)
4150 struct platform_device *p = to_platform_device(dev);
4154 return sprintf(buf, "%X\n", UDP->cmos);
4157 DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL);
4159 static void floppy_device_release(struct device *dev)
4163 static int floppy_resume(struct device *dev)
4167 for (fdc = 0; fdc < N_FDC; fdc++)
4168 if (FDCS->address != -1)
4169 user_reset_fdc(-1, FD_RESET_ALWAYS, 0);
4174 static const struct dev_pm_ops floppy_pm_ops = {
4175 .resume = floppy_resume,
4176 .restore = floppy_resume,
4179 static struct platform_driver floppy_driver = {
4182 .pm = &floppy_pm_ops,
4186 static struct platform_device floppy_device[N_DRIVE];
4188 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
4190 int drive = (*part & 3) | ((*part & 0x80) >> 5);
4191 if (drive >= N_DRIVE ||
4192 !(allowed_drive_mask & (1 << drive)) ||
4193 fdc_state[FDC(drive)].version == FDC_NONE)
4195 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type))
4198 return get_disk(disks[drive]);
4201 static int __init floppy_init(void)
4206 #if defined(CONFIG_PPC)
4207 if (check_legacy_ioport(FDC1))
4213 for (dr = 0; dr < N_DRIVE; dr++) {
4214 disks[dr] = alloc_disk(1);
4220 disks[dr]->major = FLOPPY_MAJOR;
4221 disks[dr]->first_minor = TOMINOR(dr);
4222 disks[dr]->fops = &floppy_fops;
4223 sprintf(disks[dr]->disk_name, "fd%d", dr);
4225 init_timer(&motor_off_timer[dr]);
4226 motor_off_timer[dr].data = dr;
4227 motor_off_timer[dr].function = motor_off_callback;
4230 err = register_blkdev(FLOPPY_MAJOR, "fd");
4234 err = platform_driver_register(&floppy_driver);
4236 goto out_unreg_blkdev;
4238 floppy_queue = blk_init_queue(do_fd_request, &floppy_lock);
4239 if (!floppy_queue) {
4241 goto out_unreg_driver;
4243 blk_queue_max_hw_sectors(floppy_queue, 64);
4245 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
4246 floppy_find, NULL, NULL);
4248 for (i = 0; i < 256; i++)
4250 floppy_sizes[i] = floppy_type[ITYPE(i)].size;
4252 floppy_sizes[i] = MAX_DISK_SIZE << 1;
4254 reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT);
4257 for (i = 0; i < N_FDC; i++) {
4259 memset(FDCS, 0, sizeof(*FDCS));
4262 #if defined(__sparc__) || defined(__mc68000__)
4263 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4267 FDCS->version = FDC_82072A;
4271 use_virtual_dma = can_use_virtual_dma & 1;
4272 fdc_state[0].address = FDC1;
4273 if (fdc_state[0].address == -1) {
4274 del_timer(&fd_timeout);
4276 goto out_unreg_region;
4279 fdc_state[1].address = FDC2;
4282 fdc = 0; /* reset fdc in case of unexpected interrupt */
4283 err = floppy_grab_irq_and_dma();
4285 del_timer(&fd_timeout);
4287 goto out_unreg_region;
4290 /* initialise drive state */
4291 for (drive = 0; drive < N_DRIVE; drive++) {
4292 memset(UDRS, 0, sizeof(*UDRS));
4293 memset(UDRWE, 0, sizeof(*UDRWE));
4294 set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags);
4295 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
4296 set_bit(FD_VERIFY_BIT, &UDRS->flags);
4297 UDRS->fd_device = -1;
4298 floppy_track_buffer = NULL;
4299 max_buffer_sectors = 0;
4302 * Small 10 msec delay to let through any interrupt that
4303 * initialization might have triggered, to not
4304 * confuse detection:
4308 for (i = 0; i < N_FDC; i++) {
4310 FDCS->driver_version = FD_DRIVER_VERSION;
4311 for (unit = 0; unit < 4; unit++)
4312 FDCS->track[unit] = 0;
4313 if (FDCS->address == -1)
4316 if (user_reset_fdc(-1, FD_RESET_ALWAYS, 0)) {
4317 /* free ioports reserved by floppy_grab_irq_and_dma() */
4318 floppy_release_regions(fdc);
4320 FDCS->version = FDC_NONE;
4323 /* Try to determine the floppy controller type */
4324 FDCS->version = get_fdc_version();
4325 if (FDCS->version == FDC_NONE) {
4326 /* free ioports reserved by floppy_grab_irq_and_dma() */
4327 floppy_release_regions(fdc);
4331 if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A)
4332 can_use_virtual_dma = 0;
4335 /* Not all FDCs seem to be able to handle the version command
4336 * properly, so force a reset for the standard FDC clones,
4337 * to avoid interrupt garbage.
4339 user_reset_fdc(-1, FD_RESET_ALWAYS, 0);
4342 del_timer(&fd_timeout);
4346 DPRINT("no floppy controllers found\n");
4348 goto out_flush_work;
4351 for (drive = 0; drive < N_DRIVE; drive++) {
4352 if (!(allowed_drive_mask & (1 << drive)))
4354 if (fdc_state[FDC(drive)].version == FDC_NONE)
4357 floppy_device[drive].name = floppy_device_name;
4358 floppy_device[drive].id = drive;
4359 floppy_device[drive].dev.release = floppy_device_release;
4361 err = platform_device_register(&floppy_device[drive]);
4363 goto out_flush_work;
4365 err = device_create_file(&floppy_device[drive].dev,
4368 goto out_unreg_platform_dev;
4370 /* to be cleaned up... */
4371 disks[drive]->private_data = (void *)(long)drive;
4372 disks[drive]->queue = floppy_queue;
4373 disks[drive]->flags |= GENHD_FL_REMOVABLE;
4374 disks[drive]->driverfs_dev = &floppy_device[drive].dev;
4375 add_disk(disks[drive]);
4380 out_unreg_platform_dev:
4381 platform_device_unregister(&floppy_device[drive]);
4383 flush_scheduled_work();
4385 floppy_release_irq_and_dma();
4387 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4388 blk_cleanup_queue(floppy_queue);
4390 platform_driver_unregister(&floppy_driver);
4392 unregister_blkdev(FLOPPY_MAJOR, "fd");
4395 del_timer(&motor_off_timer[dr]);
4396 put_disk(disks[dr]);
4401 static DEFINE_SPINLOCK(floppy_usage_lock);
4403 static const struct io_region {
4408 /* address + 3 is sometimes reserved by pnp bios for motherboard */
4410 /* address + 6 is reserved, and may be taken by IDE.
4411 * Unfortunately, Adaptec doesn't know this :-(, */
4415 static void floppy_release_allocated_regions(int fdc, const struct io_region *p)
4417 while (p != io_regions) {
4419 release_region(FDCS->address + p->offset, p->size);
4423 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
4425 static int floppy_request_regions(int fdc)
4427 const struct io_region *p;
4429 for (p = io_regions; p < ARRAY_END(io_regions); p++) {
4430 if (!request_region(FDCS->address + p->offset,
4431 p->size, "floppy")) {
4432 DPRINT("Floppy io-port 0x%04lx in use\n",
4433 FDCS->address + p->offset);
4434 floppy_release_allocated_regions(fdc, p);
4441 static void floppy_release_regions(int fdc)
4443 floppy_release_allocated_regions(fdc, ARRAY_END(io_regions));
4446 static int floppy_grab_irq_and_dma(void)
4448 unsigned long flags;
4450 spin_lock_irqsave(&floppy_usage_lock, flags);
4451 if (usage_count++) {
4452 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4455 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4458 * We might have scheduled a free_irq(), wait it to
4461 flush_scheduled_work();
4463 if (fd_request_irq()) {
4464 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4466 spin_lock_irqsave(&floppy_usage_lock, flags);
4468 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4471 if (fd_request_dma()) {
4472 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4474 if (can_use_virtual_dma & 2)
4475 use_virtual_dma = can_use_virtual_dma = 1;
4476 if (!(can_use_virtual_dma & 1)) {
4478 spin_lock_irqsave(&floppy_usage_lock, flags);
4480 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4485 for (fdc = 0; fdc < N_FDC; fdc++) {
4486 if (FDCS->address != -1) {
4487 if (floppy_request_regions(fdc))
4491 for (fdc = 0; fdc < N_FDC; fdc++) {
4492 if (FDCS->address != -1) {
4494 fd_outb(FDCS->dor, FD_DOR);
4498 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4500 for (fdc = 0; fdc < N_FDC; fdc++)
4501 if (FDCS->address != -1)
4502 fd_outb(FDCS->dor, FD_DOR);
4504 * The driver will try and free resources and relies on us
4505 * to know if they were allocated or not.
4508 irqdma_allocated = 1;
4514 floppy_release_regions(fdc);
4515 spin_lock_irqsave(&floppy_usage_lock, flags);
4517 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4521 static void floppy_release_irq_and_dma(void)
4524 #ifdef FLOPPY_SANITY_CHECK
4530 unsigned long tmpaddr;
4531 unsigned long flags;
4533 spin_lock_irqsave(&floppy_usage_lock, flags);
4534 if (--usage_count) {
4535 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4538 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4539 if (irqdma_allocated) {
4543 irqdma_allocated = 0;
4549 floppy_enable_hlt();
4551 if (floppy_track_buffer && max_buffer_sectors) {
4552 tmpsize = max_buffer_sectors * 1024;
4553 tmpaddr = (unsigned long)floppy_track_buffer;
4554 floppy_track_buffer = NULL;
4555 max_buffer_sectors = 0;
4556 buffer_min = buffer_max = -1;
4557 fd_dma_mem_free(tmpaddr, tmpsize);
4559 #ifdef FLOPPY_SANITY_CHECK
4561 for (drive = 0; drive < N_FDC * 4; drive++)
4562 if (timer_pending(motor_off_timer + drive))
4563 pr_info("motor off timer %d still active\n", drive);
4566 if (timer_pending(&fd_timeout))
4567 pr_info("floppy timer still active:%s\n", timeout_message);
4568 if (timer_pending(&fd_timer))
4569 pr_info("auxiliary floppy timer still active\n");
4570 if (work_pending(&floppy_work))
4571 pr_info("work still pending\n");
4574 for (fdc = 0; fdc < N_FDC; fdc++)
4575 if (FDCS->address != -1)
4576 floppy_release_regions(fdc);
4582 static char *floppy;
4584 static void __init parse_floppy_cfg_string(char *cfg)
4590 while (*cfg && *cfg != ' ' && *cfg != '\t')
4601 static int __init floppy_module_init(void)
4604 parse_floppy_cfg_string(floppy);
4605 return floppy_init();
4607 module_init(floppy_module_init);
4609 static void __exit floppy_module_exit(void)
4613 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4614 unregister_blkdev(FLOPPY_MAJOR, "fd");
4615 platform_driver_unregister(&floppy_driver);
4617 for (drive = 0; drive < N_DRIVE; drive++) {
4618 del_timer_sync(&motor_off_timer[drive]);
4620 if ((allowed_drive_mask & (1 << drive)) &&
4621 fdc_state[FDC(drive)].version != FDC_NONE) {
4622 del_gendisk(disks[drive]);
4623 device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
4624 platform_device_unregister(&floppy_device[drive]);
4626 put_disk(disks[drive]);
4629 del_timer_sync(&fd_timeout);
4630 del_timer_sync(&fd_timer);
4631 blk_cleanup_queue(floppy_queue);
4634 floppy_release_irq_and_dma();
4636 /* eject disk, if any */
4640 module_exit(floppy_module_exit);
4642 module_param(floppy, charp, 0);
4643 module_param(FLOPPY_IRQ, int, 0);
4644 module_param(FLOPPY_DMA, int, 0);
4645 MODULE_AUTHOR("Alain L. Knaff");
4646 MODULE_SUPPORTED_DEVICE("fd");
4647 MODULE_LICENSE("GPL");
4649 /* This doesn't actually get used other than for module information */
4650 static const struct pnp_device_id floppy_pnpids[] = {
4655 MODULE_DEVICE_TABLE(pnp, floppy_pnpids);
4659 __setup("floppy=", floppy_setup);
4660 module_init(floppy_init)
4663 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);