1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/drivers/block/floppy.c
5 * Copyright (C) 1991, 1992 Linus Torvalds
6 * Copyright (C) 1993, 1994 Alain Knaff
7 * Copyright (C) 1998 Alan Cox
11 * 02.12.91 - Changed to static variables to indicate need for reset
12 * and recalibrate. This makes some things easier (output_byte reset
13 * checking etc), and means less interrupt jumping in case of errors,
14 * so the code is hopefully easier to understand.
18 * This file is certainly a mess. I've tried my best to get it working,
19 * but I don't like programming floppies, and I have only one anyway.
20 * Urgel. I should check for more errors, and do more graceful error
21 * recovery. Seems there are problems with several drives. I've tried to
22 * correct them. No promises.
26 * As with hd.c, all routines within this file can (and will) be called
27 * by interrupts, so extreme caution is needed. A hardware interrupt
28 * handler may not sleep, or a kernel panic will happen. Thus I cannot
29 * call "floppy-on" directly, but have to set a special timer interrupt
34 * 28.02.92 - made track-buffering routines, based on the routines written
35 * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus.
39 * Automatic floppy-detection and formatting written by Werner Almesberger
40 * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with
41 * the floppy-change signal detection.
45 * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed
46 * FDC data overrun bug, added some preliminary stuff for vertical
49 * 1992/9/17: Added DMA allocation & DMA functions. -- hhb.
51 * TODO: Errors are still not counted properly.
55 * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl)
56 * modeled after the freeware MS-DOS program fdformat/88 V1.8 by
57 * Christoph H. Hochst\"atter.
58 * I have fixed the shift values to the ones I always use. Maybe a new
59 * ioctl() should be created to be able to modify them.
60 * There is a bug in the driver that makes it impossible to format a
61 * floppy as the first thing after bootup.
65 * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and
66 * this helped the floppy driver as well. Much cleaner, and still seems to
70 /* 1994/6/24 --bbroad-- added the floppy table entries and made
71 * minor modifications to allow 2.88 floppies to be run.
74 /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more
79 * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger
80 * format bug fixes, but unfortunately some new bugs too...
83 /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write
84 * errors to allow safe writing by specialized programs.
87 /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks
88 * by defining bit 1 of the "stretch" parameter to mean put sectors on the
89 * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's
90 * drives are "upside-down").
94 * 1995/8/26 -- Andreas Busse -- added Mips support.
98 * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent
99 * features to asm/floppy.h.
103 * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
107 * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of
108 * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting &
109 * use of '0' for NULL.
113 * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation
118 * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives.
122 * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24
123 * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were
124 * being used to store jiffies, which are unsigned longs).
128 * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br>
129 * - get rid of check_region
134 * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no
135 * floppy controller (lingering task on list after module is gone... boom.)
139 * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range
140 * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix
141 * requires many non-obvious changes in arch dependent code.
144 /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>.
145 * Better audit of register_blkdev.
148 #define REALLY_SLOW_IO
152 #define DPRINT(format, args...) \
153 pr_info("floppy%d: " format, current_drive, ##args)
155 #define DCL_DEBUG /* debug disk change line */
157 #define debug_dcl(test, fmt, args...) \
158 do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0)
160 #define debug_dcl(test, fmt, args...) \
161 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>
172 #include <linux/fdreg.h>
173 #include <linux/fd.h>
174 #include <linux/hdreg.h>
175 #include <linux/errno.h>
176 #include <linux/slab.h>
177 #include <linux/mm.h>
178 #include <linux/bio.h>
179 #include <linux/string.h>
180 #include <linux/jiffies.h>
181 #include <linux/fcntl.h>
182 #include <linux/delay.h>
183 #include <linux/mc146818rtc.h> /* CMOS defines */
184 #include <linux/ioport.h>
185 #include <linux/interrupt.h>
186 #include <linux/init.h>
187 #include <linux/platform_device.h>
188 #include <linux/mod_devicetable.h>
189 #include <linux/mutex.h>
190 #include <linux/io.h>
191 #include <linux/uaccess.h>
192 #include <linux/async.h>
193 #include <linux/compat.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 DEFINE_MUTEX(floppy_mutex);
201 static int slow_floppy;
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 #include <linux/blk-mq.h>
254 #include <linux/blkpg.h>
255 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
256 #include <linux/completion.h>
258 static LIST_HEAD(floppy_reqs);
259 static struct request *current_req;
260 static int set_next_request(void);
262 #ifndef fd_get_dma_residue
263 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
266 /* Dma Memory related stuff */
268 #ifndef fd_dma_mem_free
269 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
272 #ifndef fd_dma_mem_alloc
273 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size))
276 #ifndef fd_cacheflush
277 #define fd_cacheflush(addr, size) /* nothing... */
280 static inline void fallback_on_nodma_alloc(char **addr, size_t l)
282 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
284 return; /* we have the memory */
285 if (can_use_virtual_dma != 2)
286 return; /* no fallback allowed */
287 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n");
288 *addr = (char *)nodma_mem_alloc(l);
294 /* End dma memory related stuff */
296 static unsigned long fake_change;
297 static bool initialized;
299 #define ITYPE(x) (((x) >> 2) & 0x1f)
300 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
301 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
302 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
303 /* reverse mapping from unit and fdc to drive */
304 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
306 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
307 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
309 /* read/write commands */
316 #define SECT_PER_TRACK 6
321 /* format commands */
323 #define F_SECT_PER_TRACK 3
329 * Maximum disk size (in kilobytes).
330 * This default is used whenever the current disk size is unknown.
331 * [Now it is rather a minimum]
333 #define MAX_DISK_SIZE 4 /* 3984 */
336 * globals used by 'result()'
338 static unsigned char reply_buffer[FD_RAW_REPLY_SIZE];
339 static int inr; /* size of reply buffer, when called from interrupt */
343 #define ST3 0 /* result of GETSTATUS */
349 #define SEL_DLY (2 * HZ / 100)
352 * this struct defines the different floppy drive types.
355 struct floppy_drive_params params;
356 const char *name; /* name printed while booting */
357 } default_drive_params[] = {
358 /* NOTE: the time values in jiffies should be in msec!
360 | Maximum data rate supported by drive type
361 | | Head load time, msec
362 | | | Head unload time, msec (not used)
363 | | | | Step rate interval, usec
364 | | | | | Time needed for spinup time (jiffies)
365 | | | | | | Timeout for spinning down (jiffies)
366 | | | | | | | Spindown offset (where disk stops)
367 | | | | | | | | Select delay
368 | | | | | | | | | RPS
369 | | | | | | | | | | Max number of tracks
370 | | | | | | | | | | | Interrupt timeout
371 | | | | | | | | | | | | Max nonintlv. sectors
372 | | | | | | | | | | | | | -Max Errors- flags */
373 {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0,
374 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" },
376 {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0,
377 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
379 {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0,
380 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
382 {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
383 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/
385 {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
386 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/
388 {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
389 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
391 {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
392 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/
393 /* | --autodetected formats--- | | |
394 * read_track | | Name printed when booting
396 * Frequency of disk change checks */
399 static struct floppy_drive_params drive_params[N_DRIVE];
400 static struct floppy_drive_struct drive_state[N_DRIVE];
401 static struct floppy_write_errors write_errors[N_DRIVE];
402 static struct timer_list motor_off_timer[N_DRIVE];
403 static struct blk_mq_tag_set tag_sets[N_DRIVE];
404 static struct block_device *opened_bdev[N_DRIVE];
405 static DEFINE_MUTEX(open_lock);
406 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
409 * This struct defines the different floppy types.
411 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
412 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
413 * tells if the disk is in Commodore 1581 format, which means side 0 sectors
414 * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
415 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
416 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
417 * side 0 is on physical side 0 (but with the misnamed sector IDs).
418 * 'stretch' should probably be renamed to something more general, like
421 * Bits 2 through 9 of 'stretch' tell the number of the first sector.
422 * The LSB (bit 2) is flipped. For most disks, the first sector
423 * is 1 (represented by 0x00<<2). For some CP/M and music sampler
424 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
425 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
427 * Other parameters should be self-explanatory (see also setfdprm(8)).
436 | | | | | | Data rate, | 0x40 for perp
437 | | | | | | | Spec1 (stepping rate, head unload
438 | | | | | | | | /fmt gap (gap2) */
439 static struct floppy_struct floppy_type[32] = {
440 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */
441 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
442 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
443 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
444 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
445 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
446 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
447 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
448 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
449 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
451 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
452 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
453 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
454 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
455 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
456 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
457 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
458 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
459 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
460 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
462 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
463 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
464 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
465 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
466 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
467 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
468 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
469 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
470 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
471 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
473 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
474 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
477 static struct gendisk *disks[N_DRIVE][ARRAY_SIZE(floppy_type)];
479 #define SECTSIZE (_FD_SECTSIZE(*floppy))
481 /* Auto-detection: Disk type used until the next media change occurs. */
482 static struct floppy_struct *current_type[N_DRIVE];
485 * User-provided type information. current_type points to
486 * the respective entry of this array.
488 static struct floppy_struct user_params[N_DRIVE];
490 static sector_t floppy_sizes[256];
492 static char floppy_device_name[] = "floppy";
495 * The driver is trying to determine the correct media format
496 * while probing is set. rw_interrupt() clears it after a
501 /* Synchronization of FDC access. */
502 #define FD_COMMAND_NONE -1
503 #define FD_COMMAND_ERROR 2
504 #define FD_COMMAND_OKAY 3
506 static volatile int command_status = FD_COMMAND_NONE;
507 static unsigned long fdc_busy;
508 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
509 static DECLARE_WAIT_QUEUE_HEAD(command_done);
511 /* Errors during formatting are counted here. */
512 static int format_errors;
514 /* Format request descriptor. */
515 static struct format_descr format_req;
518 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
519 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
520 * H is head unload time (1=16ms, 2=32ms, etc)
525 * Because these are written to by the DMA controller, they must
526 * not contain a 64k byte boundary crossing, or data will be
529 static char *floppy_track_buffer;
530 static int max_buffer_sectors;
533 typedef void (*done_f)(int);
534 static const struct cont_t {
535 void (*interrupt)(void);
536 /* this is called after the interrupt of the
538 void (*redo)(void); /* this is called to retry the operation */
539 void (*error)(void); /* this is called to tally an error */
540 done_f done; /* this is called to say if the operation has
541 * succeeded/failed */
544 static void floppy_ready(void);
545 static void floppy_start(void);
546 static void process_fd_request(void);
547 static void recalibrate_floppy(void);
548 static void floppy_shutdown(struct work_struct *);
550 static int floppy_request_regions(int);
551 static void floppy_release_regions(int);
552 static int floppy_grab_irq_and_dma(void);
553 static void floppy_release_irq_and_dma(void);
556 * The "reset" variable should be tested whenever an interrupt is scheduled,
557 * after the commands have been sent. This is to ensure that the driver doesn't
558 * get wedged when the interrupt doesn't come because of a failed command.
559 * reset doesn't need to be tested before sending commands, because
560 * output_byte is automatically disabled when reset is set.
562 static void reset_fdc(void);
563 static int floppy_revalidate(struct gendisk *disk);
566 * These are global variables, as that's the easiest way to give
567 * information to interrupts. They are the data used for the current
571 #define NEED_1_RECAL -2
572 #define NEED_2_RECAL -3
574 static atomic_t usage_count = ATOMIC_INIT(0);
576 /* buffer related variables */
577 static int buffer_track = -1;
578 static int buffer_drive = -1;
579 static int buffer_min = -1;
580 static int buffer_max = -1;
582 /* fdc related variables, should end up in a struct */
583 static struct floppy_fdc_state fdc_state[N_FDC];
584 static int current_fdc; /* current fdc */
586 static struct workqueue_struct *floppy_wq;
588 static struct floppy_struct *_floppy = floppy_type;
589 static unsigned char current_drive;
590 static long current_count_sectors;
591 static unsigned char fsector_t; /* sector in track */
592 static unsigned char in_sector_offset; /* offset within physical sector,
593 * expressed in units of 512 bytes */
595 static inline unsigned char fdc_inb(int fdc, int reg)
597 return fd_inb(fdc_state[fdc].address, reg);
600 static inline void fdc_outb(unsigned char value, int fdc, int reg)
602 fd_outb(value, fdc_state[fdc].address, reg);
605 static inline bool drive_no_geom(int drive)
607 return !current_type[drive] && !ITYPE(drive_state[drive].fd_device);
611 static inline int fd_eject(int drive)
622 static long unsigned debugtimer;
624 static inline void set_debugt(void)
626 debugtimer = jiffies;
629 static inline void debugt(const char *func, const char *msg)
631 if (drive_params[current_drive].flags & DEBUGT)
632 pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer);
635 static inline void set_debugt(void) { }
636 static inline void debugt(const char *func, const char *msg) { }
640 static DECLARE_DELAYED_WORK(fd_timeout, floppy_shutdown);
641 static const char *timeout_message;
643 static void is_alive(const char *func, const char *message)
645 /* this routine checks whether the floppy driver is "alive" */
646 if (test_bit(0, &fdc_busy) && command_status < 2 &&
647 !delayed_work_pending(&fd_timeout)) {
648 DPRINT("%s: timeout handler died. %s\n", func, message);
652 static void (*do_floppy)(void) = NULL;
656 static void (*lasthandler)(void);
657 static unsigned long interruptjiffies;
658 static unsigned long resultjiffies;
659 static int resultsize;
660 static unsigned long lastredo;
662 static struct output_log {
664 unsigned char status;
665 unsigned long jiffies;
666 } output_log[OLOGSIZE];
668 static int output_log_pos;
670 #define MAXTIMEOUT -2
672 static void __reschedule_timeout(int drive, const char *message)
676 if (drive < 0 || drive >= N_DRIVE) {
680 delay = drive_params[drive].timeout;
682 mod_delayed_work(floppy_wq, &fd_timeout, delay);
683 if (drive_params[drive].flags & FD_DEBUG)
684 DPRINT("reschedule timeout %s\n", message);
685 timeout_message = message;
688 static void reschedule_timeout(int drive, const char *message)
692 spin_lock_irqsave(&floppy_lock, flags);
693 __reschedule_timeout(drive, message);
694 spin_unlock_irqrestore(&floppy_lock, flags);
697 #define INFBOUND(a, b) (a) = max_t(int, a, b)
698 #define SUPBOUND(a, b) (a) = min_t(int, a, b)
701 * Bottom half floppy driver.
702 * ==========================
704 * This part of the file contains the code talking directly to the hardware,
705 * and also the main service loop (seek-configure-spinup-command)
710 * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
711 * and the last_checked date.
713 * last_checked is the date of the last check which showed 'no disk change'
714 * FD_DISK_CHANGE is set under two conditions:
715 * 1. The floppy has been changed after some i/o to that floppy already
717 * 2. No floppy disk is in the drive. This is done in order to ensure that
718 * requests are quickly flushed in case there is no disk in the drive. It
719 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
722 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
723 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
724 * each seek. If a disk is present, the disk change line should also be
725 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
726 * change line is set, this means either that no disk is in the drive, or
727 * that it has been removed since the last seek.
729 * This means that we really have a third possibility too:
730 * The floppy has been changed after the last seek.
733 static int disk_change(int drive)
735 int fdc = FDC(drive);
737 if (time_before(jiffies, drive_state[drive].select_date + drive_params[drive].select_delay))
738 DPRINT("WARNING disk change called early\n");
739 if (!(fdc_state[fdc].dor & (0x10 << UNIT(drive))) ||
740 (fdc_state[fdc].dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
741 DPRINT("probing disk change on unselected drive\n");
742 DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive),
743 (unsigned int)fdc_state[fdc].dor);
746 debug_dcl(drive_params[drive].flags,
747 "checking disk change line for drive %d\n", drive);
748 debug_dcl(drive_params[drive].flags, "jiffies=%lu\n", jiffies);
749 debug_dcl(drive_params[drive].flags, "disk change line=%x\n",
750 fdc_inb(fdc, FD_DIR) & 0x80);
751 debug_dcl(drive_params[drive].flags, "flags=%lx\n",
752 drive_state[drive].flags);
754 if (drive_params[drive].flags & FD_BROKEN_DCL)
755 return test_bit(FD_DISK_CHANGED_BIT,
756 &drive_state[drive].flags);
757 if ((fdc_inb(fdc, FD_DIR) ^ drive_params[drive].flags) & 0x80) {
758 set_bit(FD_VERIFY_BIT, &drive_state[drive].flags);
759 /* verify write protection */
761 if (drive_state[drive].maxblock) /* mark it changed */
762 set_bit(FD_DISK_CHANGED_BIT,
763 &drive_state[drive].flags);
765 /* invalidate its geometry */
766 if (drive_state[drive].keep_data >= 0) {
767 if ((drive_params[drive].flags & FTD_MSG) &&
768 current_type[drive] != NULL)
769 DPRINT("Disk type is undefined after disk change\n");
770 current_type[drive] = NULL;
771 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1;
776 drive_state[drive].last_checked = jiffies;
777 clear_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[drive].flags);
782 static inline int is_selected(int dor, int unit)
784 return ((dor & (0x10 << unit)) && (dor & 3) == unit);
787 static bool is_ready_state(int status)
789 int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA);
790 return state == STATUS_READY;
793 static int set_dor(int fdc, char mask, char data)
797 unsigned char newdor;
798 unsigned char olddor;
800 if (fdc_state[fdc].address == -1)
803 olddor = fdc_state[fdc].dor;
804 newdor = (olddor & mask) | data;
805 if (newdor != olddor) {
807 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) {
808 drive = REVDRIVE(fdc, unit);
809 debug_dcl(drive_params[drive].flags,
810 "calling disk change from set_dor\n");
813 fdc_state[fdc].dor = newdor;
814 fdc_outb(newdor, fdc, FD_DOR);
817 if (!is_selected(olddor, unit) && is_selected(newdor, unit)) {
818 drive = REVDRIVE(fdc, unit);
819 drive_state[drive].select_date = jiffies;
825 static void twaddle(int fdc, int drive)
827 if (drive_params[drive].select_delay)
829 fdc_outb(fdc_state[fdc].dor & ~(0x10 << UNIT(drive)),
831 fdc_outb(fdc_state[fdc].dor, fdc, FD_DOR);
832 drive_state[drive].select_date = jiffies;
836 * Reset all driver information about the specified fdc.
837 * This is needed after a reset, and after a raw command.
839 static void reset_fdc_info(int fdc, int mode)
843 fdc_state[fdc].spec1 = fdc_state[fdc].spec2 = -1;
844 fdc_state[fdc].need_configure = 1;
845 fdc_state[fdc].perp_mode = 1;
846 fdc_state[fdc].rawcmd = 0;
847 for (drive = 0; drive < N_DRIVE; drive++)
848 if (FDC(drive) == fdc &&
849 (mode || drive_state[drive].track != NEED_1_RECAL))
850 drive_state[drive].track = NEED_2_RECAL;
854 * selects the fdc and drive, and enables the fdc's input/dma.
855 * Both current_drive and current_fdc are changed to match the new drive.
857 static void set_fdc(int drive)
861 if (drive < 0 || drive >= N_DRIVE) {
862 pr_info("bad drive value %d\n", drive);
868 pr_info("bad fdc value\n");
874 set_dor(1 - fdc, ~8, 0);
876 if (fdc_state[fdc].rawcmd == 2)
877 reset_fdc_info(fdc, 1);
878 if (fdc_inb(fdc, FD_STATUS) != STATUS_READY)
879 fdc_state[fdc].reset = 1;
881 current_drive = drive;
887 * Both current_drive and current_fdc are changed to match the new drive.
889 static int lock_fdc(int drive)
891 if (WARN(atomic_read(&usage_count) == 0,
892 "Trying to lock fdc while usage count=0\n"))
895 if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy)))
898 command_status = FD_COMMAND_NONE;
900 reschedule_timeout(drive, "lock fdc");
905 /* unlocks the driver */
906 static void unlock_fdc(void)
908 if (!test_bit(0, &fdc_busy))
909 DPRINT("FDC access conflict!\n");
912 command_status = FD_COMMAND_NONE;
913 cancel_delayed_work(&fd_timeout);
916 clear_bit(0, &fdc_busy);
920 /* switches the motor off after a given timeout */
921 static void motor_off_callback(struct timer_list *t)
923 unsigned long nr = t - motor_off_timer;
924 unsigned char mask = ~(0x10 << UNIT(nr));
926 if (WARN_ON_ONCE(nr >= N_DRIVE))
929 set_dor(FDC(nr), mask, 0);
932 /* schedules motor off */
933 static void floppy_off(unsigned int drive)
935 unsigned long volatile delta;
936 int fdc = FDC(drive);
938 if (!(fdc_state[fdc].dor & (0x10 << UNIT(drive))))
941 del_timer(motor_off_timer + drive);
943 /* make spindle stop in a position which minimizes spinup time
945 if (drive_params[drive].rps) {
946 delta = jiffies - drive_state[drive].first_read_date + HZ -
947 drive_params[drive].spindown_offset;
948 delta = ((delta * drive_params[drive].rps) % HZ) / drive_params[drive].rps;
949 motor_off_timer[drive].expires =
950 jiffies + drive_params[drive].spindown - delta;
952 add_timer(motor_off_timer + drive);
956 * cycle through all N_DRIVE floppy drives, for disk change testing.
957 * stopping at current drive. This is done before any long operation, to
958 * be sure to have up to date disk change information.
960 static void scandrives(void)
966 if (drive_params[current_drive].select_delay)
969 saved_drive = current_drive;
970 for (i = 0; i < N_DRIVE; i++) {
971 drive = (saved_drive + i + 1) % N_DRIVE;
972 if (drive_state[drive].fd_ref == 0 || drive_params[drive].select_delay != 0)
973 continue; /* skip closed drives */
975 if (!(set_dor(current_fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &
976 (0x10 << UNIT(drive))))
977 /* switch the motor off again, if it was off to
979 set_dor(current_fdc, ~(0x10 << UNIT(drive)), 0);
981 set_fdc(saved_drive);
984 static void empty(void)
988 static void (*floppy_work_fn)(void);
990 static void floppy_work_workfn(struct work_struct *work)
995 static DECLARE_WORK(floppy_work, floppy_work_workfn);
997 static void schedule_bh(void (*handler)(void))
999 WARN_ON(work_pending(&floppy_work));
1001 floppy_work_fn = handler;
1002 queue_work(floppy_wq, &floppy_work);
1005 static void (*fd_timer_fn)(void) = NULL;
1007 static void fd_timer_workfn(struct work_struct *work)
1012 static DECLARE_DELAYED_WORK(fd_timer, fd_timer_workfn);
1014 static void cancel_activity(void)
1017 cancel_delayed_work(&fd_timer);
1018 cancel_work_sync(&floppy_work);
1021 /* this function makes sure that the disk stays in the drive during the
1023 static void fd_watchdog(void)
1025 debug_dcl(drive_params[current_drive].flags,
1026 "calling disk change from watchdog\n");
1028 if (disk_change(current_drive)) {
1029 DPRINT("disk removed during i/o\n");
1034 cancel_delayed_work(&fd_timer);
1035 fd_timer_fn = fd_watchdog;
1036 queue_delayed_work(floppy_wq, &fd_timer, HZ / 10);
1040 static void main_command_interrupt(void)
1042 cancel_delayed_work(&fd_timer);
1046 /* waits for a delay (spinup or select) to pass */
1047 static int fd_wait_for_completion(unsigned long expires,
1048 void (*function)(void))
1050 if (fdc_state[current_fdc].reset) {
1051 reset_fdc(); /* do the reset during sleep to win time
1052 * if we don't need to sleep, it's a good
1053 * occasion anyways */
1057 if (time_before(jiffies, expires)) {
1058 cancel_delayed_work(&fd_timer);
1059 fd_timer_fn = function;
1060 queue_delayed_work(floppy_wq, &fd_timer, expires - jiffies);
1066 static void setup_DMA(void)
1070 if (raw_cmd->length == 0) {
1071 print_hex_dump(KERN_INFO, "zero dma transfer size: ",
1072 DUMP_PREFIX_NONE, 16, 1,
1073 raw_cmd->fullcmd, raw_cmd->cmd_count, false);
1075 fdc_state[current_fdc].reset = 1;
1078 if (((unsigned long)raw_cmd->kernel_data) % 512) {
1079 pr_info("non aligned address: %p\n", raw_cmd->kernel_data);
1081 fdc_state[current_fdc].reset = 1;
1084 f = claim_dma_lock();
1087 if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length,
1088 (raw_cmd->flags & FD_RAW_READ) ?
1089 DMA_MODE_READ : DMA_MODE_WRITE,
1090 fdc_state[current_fdc].address) < 0) {
1091 release_dma_lock(f);
1093 fdc_state[current_fdc].reset = 1;
1096 release_dma_lock(f);
1099 fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length);
1100 fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ?
1101 DMA_MODE_READ : DMA_MODE_WRITE);
1102 fd_set_dma_addr(raw_cmd->kernel_data);
1103 fd_set_dma_count(raw_cmd->length);
1104 virtual_dma_port = fdc_state[current_fdc].address;
1106 release_dma_lock(f);
1110 static void show_floppy(int fdc);
1112 /* waits until the fdc becomes ready */
1113 static int wait_til_ready(int fdc)
1118 if (fdc_state[fdc].reset)
1120 for (counter = 0; counter < 10000; counter++) {
1121 status = fdc_inb(fdc, FD_STATUS);
1122 if (status & STATUS_READY)
1126 DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc);
1129 fdc_state[fdc].reset = 1;
1133 /* sends a command byte to the fdc */
1134 static int output_byte(int fdc, char byte)
1136 int status = wait_til_ready(fdc);
1141 if (is_ready_state(status)) {
1142 fdc_outb(byte, fdc, FD_DATA);
1143 output_log[output_log_pos].data = byte;
1144 output_log[output_log_pos].status = status;
1145 output_log[output_log_pos].jiffies = jiffies;
1146 output_log_pos = (output_log_pos + 1) % OLOGSIZE;
1149 fdc_state[fdc].reset = 1;
1151 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
1158 /* gets the response from the fdc */
1159 static int result(int fdc)
1164 for (i = 0; i < FD_RAW_REPLY_SIZE; i++) {
1165 status = wait_til_ready(fdc);
1168 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA;
1169 if ((status & ~STATUS_BUSY) == STATUS_READY) {
1170 resultjiffies = jiffies;
1174 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY))
1175 reply_buffer[i] = fdc_inb(fdc, FD_DATA);
1180 DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
1184 fdc_state[fdc].reset = 1;
1188 #define MORE_OUTPUT -2
1189 /* does the fdc need more output? */
1190 static int need_more_output(int fdc)
1192 int status = wait_til_ready(fdc);
1197 if (is_ready_state(status))
1203 /* Set perpendicular mode as required, based on data rate, if supported.
1204 * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1206 static void perpendicular_mode(int fdc)
1208 unsigned char perp_mode;
1210 if (raw_cmd->rate & 0x40) {
1211 switch (raw_cmd->rate & 3) {
1219 DPRINT("Invalid data rate for perpendicular mode!\n");
1221 fdc_state[fdc].reset = 1;
1223 * convenient way to return to
1224 * redo without too much hassle
1225 * (deep stack et al.)
1232 if (fdc_state[fdc].perp_mode == perp_mode)
1234 if (fdc_state[fdc].version >= FDC_82077_ORIG) {
1235 output_byte(fdc, FD_PERPENDICULAR);
1236 output_byte(fdc, perp_mode);
1237 fdc_state[fdc].perp_mode = perp_mode;
1238 } else if (perp_mode) {
1239 DPRINT("perpendicular mode not supported by this FDC.\n");
1241 } /* perpendicular_mode */
1243 static int fifo_depth = 0xa;
1246 static int fdc_configure(int fdc)
1249 output_byte(fdc, FD_CONFIGURE);
1250 if (need_more_output(fdc) != MORE_OUTPUT)
1252 output_byte(fdc, 0);
1253 output_byte(fdc, 0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf));
1254 output_byte(fdc, 0); /* pre-compensation from track 0 upwards */
1258 #define NOMINAL_DTR 500
1260 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1261 * head load time, and DMA disable flag to values needed by floppy.
1263 * The value "dtr" is the data transfer rate in Kbps. It is needed
1264 * to account for the data rate-based scaling done by the 82072 and 82077
1265 * FDC types. This parameter is ignored for other types of FDCs (i.e.
1268 * Note that changing the data transfer rate has a (probably deleterious)
1269 * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1270 * fdc_specify is called again after each data transfer rate
1273 * srt: 1000 to 16000 in microseconds
1274 * hut: 16 to 240 milliseconds
1275 * hlt: 2 to 254 milliseconds
1277 * These values are rounded up to the next highest available delay time.
1279 static void fdc_specify(int fdc, int drive)
1281 unsigned char spec1;
1282 unsigned char spec2;
1286 unsigned long dtr = NOMINAL_DTR;
1287 unsigned long scale_dtr = NOMINAL_DTR;
1288 int hlt_max_code = 0x7f;
1289 int hut_max_code = 0xf;
1291 if (fdc_state[fdc].need_configure &&
1292 fdc_state[fdc].version >= FDC_82072A) {
1294 fdc_state[fdc].need_configure = 0;
1297 switch (raw_cmd->rate & 0x03) {
1303 if (fdc_state[fdc].version >= FDC_82078) {
1304 /* chose the default rate table, not the one
1305 * where 1 = 2 Mbps */
1306 output_byte(fdc, FD_DRIVESPEC);
1307 if (need_more_output(fdc) == MORE_OUTPUT) {
1308 output_byte(fdc, UNIT(drive));
1309 output_byte(fdc, 0xc0);
1318 if (fdc_state[fdc].version >= FDC_82072) {
1320 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1321 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1324 /* Convert step rate from microseconds to milliseconds and 4 bits */
1325 srt = 16 - DIV_ROUND_UP(drive_params[drive].srt * scale_dtr / 1000,
1333 hlt = DIV_ROUND_UP(drive_params[drive].hlt * scale_dtr / 2,
1337 else if (hlt > 0x7f)
1340 hut = DIV_ROUND_UP(drive_params[drive].hut * scale_dtr / 16,
1347 spec1 = (srt << 4) | hut;
1348 spec2 = (hlt << 1) | (use_virtual_dma & 1);
1350 /* If these parameters did not change, just return with success */
1351 if (fdc_state[fdc].spec1 != spec1 ||
1352 fdc_state[fdc].spec2 != spec2) {
1353 /* Go ahead and set spec1 and spec2 */
1354 output_byte(fdc, FD_SPECIFY);
1355 output_byte(fdc, fdc_state[fdc].spec1 = spec1);
1356 output_byte(fdc, fdc_state[fdc].spec2 = spec2);
1360 /* Set the FDC's data transfer rate on behalf of the specified drive.
1361 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1362 * of the specify command (i.e. using the fdc_specify function).
1364 static int fdc_dtr(void)
1366 /* If data rate not already set to desired value, set it. */
1367 if ((raw_cmd->rate & 3) == fdc_state[current_fdc].dtr)
1371 fdc_outb(raw_cmd->rate & 3, current_fdc, FD_DCR);
1373 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1374 * need a stabilization period of several milliseconds to be
1375 * enforced after data rate changes before R/W operations.
1376 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1378 fdc_state[current_fdc].dtr = raw_cmd->rate & 3;
1379 return fd_wait_for_completion(jiffies + 2UL * HZ / 100, floppy_ready);
1382 static void tell_sector(void)
1384 pr_cont(": track %d, head %d, sector %d, size %d",
1385 reply_buffer[R_TRACK], reply_buffer[R_HEAD],
1386 reply_buffer[R_SECTOR],
1387 reply_buffer[R_SIZECODE]);
1390 static void print_errors(void)
1393 if (reply_buffer[ST0] & ST0_ECE) {
1394 pr_cont("Recalibrate failed!");
1395 } else if (reply_buffer[ST2] & ST2_CRC) {
1396 pr_cont("data CRC error");
1398 } else if (reply_buffer[ST1] & ST1_CRC) {
1399 pr_cont("CRC error");
1401 } else if ((reply_buffer[ST1] & (ST1_MAM | ST1_ND)) ||
1402 (reply_buffer[ST2] & ST2_MAM)) {
1404 pr_cont("sector not found");
1407 pr_cont("probe failed...");
1408 } else if (reply_buffer[ST2] & ST2_WC) { /* seek error */
1409 pr_cont("wrong cylinder");
1410 } else if (reply_buffer[ST2] & ST2_BC) { /* cylinder marked as bad */
1411 pr_cont("bad cylinder");
1413 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
1414 reply_buffer[ST0], reply_buffer[ST1],
1422 * OK, this error interpreting routine is called after a
1423 * DMA read/write has succeeded
1424 * or failed, so we check the results, and copy any buffers.
1425 * hhb: Added better error reporting.
1426 * ak: Made this into a separate routine.
1428 static int interpret_errors(void)
1433 DPRINT("-- FDC reply error\n");
1434 fdc_state[current_fdc].reset = 1;
1438 /* check IC to find cause of interrupt */
1439 switch (reply_buffer[ST0] & ST0_INTR) {
1440 case 0x40: /* error occurred during command execution */
1441 if (reply_buffer[ST1] & ST1_EOC)
1442 return 0; /* occurs with pseudo-DMA */
1444 if (reply_buffer[ST1] & ST1_WP) {
1445 DPRINT("Drive is write protected\n");
1446 clear_bit(FD_DISK_WRITABLE_BIT,
1447 &drive_state[current_drive].flags);
1450 } else if (reply_buffer[ST1] & ST1_ND) {
1451 set_bit(FD_NEED_TWADDLE_BIT,
1452 &drive_state[current_drive].flags);
1453 } else if (reply_buffer[ST1] & ST1_OR) {
1454 if (drive_params[current_drive].flags & FTD_MSG)
1455 DPRINT("Over/Underrun - retrying\n");
1457 } else if (*errors >= drive_params[current_drive].max_errors.reporting) {
1460 if (reply_buffer[ST2] & ST2_WC || reply_buffer[ST2] & ST2_BC)
1461 /* wrong cylinder => recal */
1462 drive_state[current_drive].track = NEED_2_RECAL;
1464 case 0x80: /* invalid command given */
1465 DPRINT("Invalid FDC command given!\n");
1469 DPRINT("Abnormal termination caused by polling\n");
1472 default: /* (0) Normal command termination */
1478 * This routine is called when everything should be correctly set up
1479 * for the transfer (i.e. floppy motor is on, the correct floppy is
1480 * selected, and the head is sitting on the right track).
1482 static void setup_rw_floppy(void)
1487 unsigned long ready_date;
1488 void (*function)(void);
1490 flags = raw_cmd->flags;
1491 if (flags & (FD_RAW_READ | FD_RAW_WRITE))
1492 flags |= FD_RAW_INTR;
1494 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) {
1495 ready_date = drive_state[current_drive].spinup_date + drive_params[current_drive].spinup;
1496 /* If spinup will take a long time, rerun scandrives
1497 * again just before spinup completion. Beware that
1498 * after scandrives, we must again wait for selection.
1500 if (time_after(ready_date, jiffies + drive_params[current_drive].select_delay)) {
1501 ready_date -= drive_params[current_drive].select_delay;
1502 function = floppy_start;
1504 function = setup_rw_floppy;
1506 /* wait until the floppy is spinning fast enough */
1507 if (fd_wait_for_completion(ready_date, function))
1510 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE))
1513 if (flags & FD_RAW_INTR)
1514 do_floppy = main_command_interrupt;
1517 for (i = 0; i < raw_cmd->cmd_count; i++)
1518 r |= output_byte(current_fdc, raw_cmd->fullcmd[i]);
1520 debugt(__func__, "rw_command");
1528 if (!(flags & FD_RAW_INTR)) {
1529 inr = result(current_fdc);
1531 } else if (flags & FD_RAW_NEED_DISK)
1535 static int blind_seek;
1538 * This is the routine called after every seek (or recalibrate) interrupt
1539 * from the floppy controller.
1541 static void seek_interrupt(void)
1543 debugt(__func__, "");
1544 if (inr != 2 || (reply_buffer[ST0] & 0xF8) != 0x20) {
1545 DPRINT("seek failed\n");
1546 drive_state[current_drive].track = NEED_2_RECAL;
1551 if (drive_state[current_drive].track >= 0 &&
1552 drive_state[current_drive].track != reply_buffer[ST1] &&
1554 debug_dcl(drive_params[current_drive].flags,
1555 "clearing NEWCHANGE flag because of effective seek\n");
1556 debug_dcl(drive_params[current_drive].flags, "jiffies=%lu\n",
1558 clear_bit(FD_DISK_NEWCHANGE_BIT,
1559 &drive_state[current_drive].flags);
1560 /* effective seek */
1561 drive_state[current_drive].select_date = jiffies;
1563 drive_state[current_drive].track = reply_buffer[ST1];
1567 static void check_wp(int fdc, int drive)
1569 if (test_bit(FD_VERIFY_BIT, &drive_state[drive].flags)) {
1570 /* check write protection */
1571 output_byte(fdc, FD_GETSTATUS);
1572 output_byte(fdc, UNIT(drive));
1573 if (result(fdc) != 1) {
1574 fdc_state[fdc].reset = 1;
1577 clear_bit(FD_VERIFY_BIT, &drive_state[drive].flags);
1578 clear_bit(FD_NEED_TWADDLE_BIT,
1579 &drive_state[drive].flags);
1580 debug_dcl(drive_params[drive].flags,
1581 "checking whether disk is write protected\n");
1582 debug_dcl(drive_params[drive].flags, "wp=%x\n",
1583 reply_buffer[ST3] & 0x40);
1584 if (!(reply_buffer[ST3] & 0x40))
1585 set_bit(FD_DISK_WRITABLE_BIT,
1586 &drive_state[drive].flags);
1588 clear_bit(FD_DISK_WRITABLE_BIT,
1589 &drive_state[drive].flags);
1593 static void seek_floppy(void)
1599 debug_dcl(drive_params[current_drive].flags,
1600 "calling disk change from %s\n", __func__);
1602 if (!test_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[current_drive].flags) &&
1603 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) {
1604 /* the media changed flag should be cleared after the seek.
1605 * If it isn't, this means that there is really no disk in
1608 set_bit(FD_DISK_CHANGED_BIT,
1609 &drive_state[current_drive].flags);
1614 if (drive_state[current_drive].track <= NEED_1_RECAL) {
1615 recalibrate_floppy();
1617 } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[current_drive].flags) &&
1618 (raw_cmd->flags & FD_RAW_NEED_DISK) &&
1619 (drive_state[current_drive].track <= NO_TRACK || drive_state[current_drive].track == raw_cmd->track)) {
1620 /* we seek to clear the media-changed condition. Does anybody
1621 * know a more elegant way, which works on all drives? */
1623 track = raw_cmd->track - 1;
1625 if (drive_params[current_drive].flags & FD_SILENT_DCL_CLEAR) {
1626 set_dor(current_fdc, ~(0x10 << UNIT(current_drive)), 0);
1628 raw_cmd->flags |= FD_RAW_NEED_SEEK;
1633 check_wp(current_fdc, current_drive);
1634 if (raw_cmd->track != drive_state[current_drive].track &&
1635 (raw_cmd->flags & FD_RAW_NEED_SEEK))
1636 track = raw_cmd->track;
1643 do_floppy = seek_interrupt;
1644 output_byte(current_fdc, FD_SEEK);
1645 output_byte(current_fdc, UNIT(current_drive));
1646 if (output_byte(current_fdc, track) < 0) {
1650 debugt(__func__, "");
1653 static void recal_interrupt(void)
1655 debugt(__func__, "");
1657 fdc_state[current_fdc].reset = 1;
1658 else if (reply_buffer[ST0] & ST0_ECE) {
1659 switch (drive_state[current_drive].track) {
1661 debugt(__func__, "need 1 recal");
1662 /* after a second recalibrate, we still haven't
1663 * reached track 0. Probably no drive. Raise an
1664 * error, as failing immediately might upset
1665 * computers possessed by the Devil :-) */
1670 debugt(__func__, "need 2 recal");
1671 /* If we already did a recalibrate,
1672 * and we are not at track 0, this
1673 * means we have moved. (The only way
1674 * not to move at recalibration is to
1675 * be already at track 0.) Clear the
1676 * new change flag */
1677 debug_dcl(drive_params[current_drive].flags,
1678 "clearing NEWCHANGE flag because of second recalibrate\n");
1680 clear_bit(FD_DISK_NEWCHANGE_BIT,
1681 &drive_state[current_drive].flags);
1682 drive_state[current_drive].select_date = jiffies;
1685 debugt(__func__, "default");
1686 /* Recalibrate moves the head by at
1687 * most 80 steps. If after one
1688 * recalibrate we don't have reached
1689 * track 0, this might mean that we
1690 * started beyond track 80. Try
1692 drive_state[current_drive].track = NEED_1_RECAL;
1696 drive_state[current_drive].track = reply_buffer[ST1];
1700 static void print_result(char *message, int inr)
1704 DPRINT("%s ", message);
1706 for (i = 0; i < inr; i++)
1707 pr_cont("repl[%d]=%x ", i, reply_buffer[i]);
1711 /* interrupt handler. Note that this can be called externally on the Sparc */
1712 irqreturn_t floppy_interrupt(int irq, void *dev_id)
1716 void (*handler)(void) = do_floppy;
1718 lasthandler = handler;
1719 interruptjiffies = jiffies;
1721 f = claim_dma_lock();
1723 release_dma_lock(f);
1726 if (current_fdc >= N_FDC || fdc_state[current_fdc].address == -1) {
1727 /* we don't even know which FDC is the culprit */
1728 pr_info("DOR0=%x\n", fdc_state[0].dor);
1729 pr_info("floppy interrupt on bizarre fdc %d\n", current_fdc);
1730 pr_info("handler=%ps\n", handler);
1731 is_alive(__func__, "bizarre fdc");
1735 fdc_state[current_fdc].reset = 0;
1736 /* We have to clear the reset flag here, because apparently on boxes
1737 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
1738 * emit SENSEI's to clear the interrupt line. And fdc_state[fdc].reset
1739 * blocks the emission of the SENSEI's.
1740 * It is OK to emit floppy commands because we are in an interrupt
1741 * handler here, and thus we have to fear no interference of other
1745 do_print = !handler && print_unex && initialized;
1747 inr = result(current_fdc);
1749 print_result("unexpected interrupt", inr);
1753 output_byte(current_fdc, FD_SENSEI);
1754 inr = result(current_fdc);
1756 print_result("sensei", inr);
1758 } while ((reply_buffer[ST0] & 0x83) != UNIT(current_drive) &&
1759 inr == 2 && max_sensei);
1762 fdc_state[current_fdc].reset = 1;
1765 schedule_bh(handler);
1766 is_alive(__func__, "normal interrupt end");
1768 /* FIXME! Was it really for us? */
1772 static void recalibrate_floppy(void)
1774 debugt(__func__, "");
1775 do_floppy = recal_interrupt;
1776 output_byte(current_fdc, FD_RECALIBRATE);
1777 if (output_byte(current_fdc, UNIT(current_drive)) < 0)
1782 * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1784 static void reset_interrupt(void)
1786 debugt(__func__, "");
1787 result(current_fdc); /* get the status ready for set_fdc */
1788 if (fdc_state[current_fdc].reset) {
1789 pr_info("reset set in interrupt, calling %ps\n", cont->error);
1790 cont->error(); /* a reset just after a reset. BAD! */
1796 * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1797 * or by setting the self clearing bit 7 of STATUS (newer FDCs).
1798 * This WILL trigger an interrupt, causing the handlers in the current
1799 * cont's ->redo() to be called via reset_interrupt().
1801 static void reset_fdc(void)
1803 unsigned long flags;
1805 do_floppy = reset_interrupt;
1806 fdc_state[current_fdc].reset = 0;
1807 reset_fdc_info(current_fdc, 0);
1809 /* Pseudo-DMA may intercept 'reset finished' interrupt. */
1810 /* Irrelevant for systems with true DMA (i386). */
1812 flags = claim_dma_lock();
1814 release_dma_lock(flags);
1816 if (fdc_state[current_fdc].version >= FDC_82072A)
1817 fdc_outb(0x80 | (fdc_state[current_fdc].dtr & 3),
1818 current_fdc, FD_STATUS);
1820 fdc_outb(fdc_state[current_fdc].dor & ~0x04, current_fdc, FD_DOR);
1821 udelay(FD_RESET_DELAY);
1822 fdc_outb(fdc_state[current_fdc].dor, current_fdc, FD_DOR);
1826 static void show_floppy(int fdc)
1831 pr_info("floppy driver state\n");
1832 pr_info("-------------------\n");
1833 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%ps\n",
1834 jiffies, interruptjiffies, jiffies - interruptjiffies,
1837 pr_info("timeout_message=%s\n", timeout_message);
1838 pr_info("last output bytes:\n");
1839 for (i = 0; i < OLOGSIZE; i++)
1840 pr_info("%2x %2x %lu\n",
1841 output_log[(i + output_log_pos) % OLOGSIZE].data,
1842 output_log[(i + output_log_pos) % OLOGSIZE].status,
1843 output_log[(i + output_log_pos) % OLOGSIZE].jiffies);
1844 pr_info("last result at %lu\n", resultjiffies);
1845 pr_info("last redo_fd_request at %lu\n", lastredo);
1846 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1,
1847 reply_buffer, resultsize, true);
1849 pr_info("status=%x\n", fdc_inb(fdc, FD_STATUS));
1850 pr_info("fdc_busy=%lu\n", fdc_busy);
1852 pr_info("do_floppy=%ps\n", do_floppy);
1853 if (work_pending(&floppy_work))
1854 pr_info("floppy_work.func=%ps\n", floppy_work.func);
1855 if (delayed_work_pending(&fd_timer))
1856 pr_info("delayed work.function=%p expires=%ld\n",
1858 fd_timer.timer.expires - jiffies);
1859 if (delayed_work_pending(&fd_timeout))
1860 pr_info("timer_function=%p expires=%ld\n",
1861 fd_timeout.work.func,
1862 fd_timeout.timer.expires - jiffies);
1864 pr_info("cont=%p\n", cont);
1865 pr_info("current_req=%p\n", current_req);
1866 pr_info("command_status=%d\n", command_status);
1870 static void floppy_shutdown(struct work_struct *arg)
1872 unsigned long flags;
1875 show_floppy(current_fdc);
1878 flags = claim_dma_lock();
1880 release_dma_lock(flags);
1882 /* avoid dma going to a random drive after shutdown */
1885 DPRINT("floppy timeout called\n");
1886 fdc_state[current_fdc].reset = 1;
1889 cont->redo(); /* this will recall reset when needed */
1891 pr_info("no cont in shutdown!\n");
1892 process_fd_request();
1894 is_alive(__func__, "");
1897 /* start motor, check media-changed condition and write protection */
1898 static int start_motor(void (*function)(void))
1904 data = UNIT(current_drive);
1905 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) {
1906 if (!(fdc_state[current_fdc].dor & (0x10 << UNIT(current_drive)))) {
1908 /* no read since this drive is running */
1909 drive_state[current_drive].first_read_date = 0;
1910 /* note motor start time if motor is not yet running */
1911 drive_state[current_drive].spinup_date = jiffies;
1912 data |= (0x10 << UNIT(current_drive));
1914 } else if (fdc_state[current_fdc].dor & (0x10 << UNIT(current_drive)))
1915 mask &= ~(0x10 << UNIT(current_drive));
1917 /* starts motor and selects floppy */
1918 del_timer(motor_off_timer + current_drive);
1919 set_dor(current_fdc, mask, data);
1921 /* wait_for_completion also schedules reset if needed. */
1922 return fd_wait_for_completion(drive_state[current_drive].select_date + drive_params[current_drive].select_delay,
1926 static void floppy_ready(void)
1928 if (fdc_state[current_fdc].reset) {
1932 if (start_motor(floppy_ready))
1937 debug_dcl(drive_params[current_drive].flags,
1938 "calling disk change from floppy_ready\n");
1939 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
1940 disk_change(current_drive) && !drive_params[current_drive].select_delay)
1941 twaddle(current_fdc, current_drive); /* this clears the dcl on certain
1942 * drive/controller combinations */
1944 #ifdef fd_chose_dma_mode
1945 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) {
1946 unsigned long flags = claim_dma_lock();
1947 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length);
1948 release_dma_lock(flags);
1952 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) {
1953 perpendicular_mode(current_fdc);
1954 fdc_specify(current_fdc, current_drive); /* must be done here because of hut, hlt ... */
1957 if ((raw_cmd->flags & FD_RAW_READ) ||
1958 (raw_cmd->flags & FD_RAW_WRITE))
1959 fdc_specify(current_fdc, current_drive);
1964 static void floppy_start(void)
1966 reschedule_timeout(current_drive, "floppy start");
1969 debug_dcl(drive_params[current_drive].flags,
1970 "setting NEWCHANGE in floppy_start\n");
1971 set_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[current_drive].flags);
1976 * ========================================================================
1977 * here ends the bottom half. Exported routines are:
1978 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
1979 * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
1980 * Initialization also uses output_byte, result, set_dor, floppy_interrupt
1982 * ========================================================================
1985 * General purpose continuations.
1986 * ==============================
1989 static void do_wakeup(void)
1991 reschedule_timeout(MAXTIMEOUT, "do wakeup");
1993 command_status += 2;
1994 wake_up(&command_done);
1997 static const struct cont_t wakeup_cont = {
2001 .done = (done_f)empty
2004 static const struct cont_t intr_cont = {
2006 .redo = process_fd_request,
2008 .done = (done_f)empty
2011 /* schedules handler, waiting for completion. May be interrupted, will then
2012 * return -EINTR, in which case the driver will automatically be unlocked.
2014 static int wait_til_done(void (*handler)(void), bool interruptible)
2018 schedule_bh(handler);
2021 wait_event_interruptible(command_done, command_status >= 2);
2023 wait_event(command_done, command_status >= 2);
2025 if (command_status < 2) {
2032 if (fdc_state[current_fdc].reset)
2033 command_status = FD_COMMAND_ERROR;
2034 if (command_status == FD_COMMAND_OKAY)
2038 command_status = FD_COMMAND_NONE;
2042 static void generic_done(int result)
2044 command_status = result;
2045 cont = &wakeup_cont;
2048 static void generic_success(void)
2053 static void generic_failure(void)
2058 static void success_and_wakeup(void)
2065 * formatting and rw support.
2066 * ==========================
2069 static int next_valid_format(int drive)
2073 probed_format = drive_state[drive].probed_format;
2075 if (probed_format >= FD_AUTODETECT_SIZE ||
2076 !drive_params[drive].autodetect[probed_format]) {
2077 drive_state[drive].probed_format = 0;
2080 if (floppy_type[drive_params[drive].autodetect[probed_format]].sect) {
2081 drive_state[drive].probed_format = probed_format;
2088 static void bad_flp_intr(void)
2093 drive_state[current_drive].probed_format++;
2094 if (!next_valid_format(current_drive))
2097 err_count = ++(*errors);
2098 INFBOUND(write_errors[current_drive].badness, err_count);
2099 if (err_count > drive_params[current_drive].max_errors.abort)
2101 if (err_count > drive_params[current_drive].max_errors.reset)
2102 fdc_state[current_fdc].reset = 1;
2103 else if (err_count > drive_params[current_drive].max_errors.recal)
2104 drive_state[current_drive].track = NEED_2_RECAL;
2107 static void set_floppy(int drive)
2109 int type = ITYPE(drive_state[drive].fd_device);
2112 _floppy = floppy_type + type;
2114 _floppy = current_type[drive];
2118 * formatting support.
2119 * ===================
2121 static void format_interrupt(void)
2123 switch (interpret_errors()) {
2135 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1))
2136 #define CT(x) ((x) | 0xc0)
2138 static void setup_format_params(int track)
2146 unsigned char track, head, sect, size;
2147 } *here = (struct fparm *)floppy_track_buffer;
2149 raw_cmd = &default_raw_cmd;
2150 raw_cmd->track = track;
2152 raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
2153 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK);
2154 raw_cmd->rate = _floppy->rate & 0x43;
2155 raw_cmd->cmd_count = NR_F;
2156 raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_FORMAT);
2157 raw_cmd->cmd[DR_SELECT] = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head);
2158 raw_cmd->cmd[F_SIZECODE] = FD_SIZECODE(_floppy);
2159 raw_cmd->cmd[F_SECT_PER_TRACK] = _floppy->sect << 2 >> raw_cmd->cmd[F_SIZECODE];
2160 raw_cmd->cmd[F_GAP] = _floppy->fmt_gap;
2161 raw_cmd->cmd[F_FILL] = FD_FILL_BYTE;
2163 raw_cmd->kernel_data = floppy_track_buffer;
2164 raw_cmd->length = 4 * raw_cmd->cmd[F_SECT_PER_TRACK];
2166 if (!raw_cmd->cmd[F_SECT_PER_TRACK])
2169 /* allow for about 30ms for data transport per track */
2170 head_shift = (raw_cmd->cmd[F_SECT_PER_TRACK] + 5) / 6;
2172 /* a ``cylinder'' is two tracks plus a little stepping time */
2173 track_shift = 2 * head_shift + 3;
2175 /* position of logical sector 1 on this track */
2176 n = (track_shift * format_req.track + head_shift * format_req.head)
2177 % raw_cmd->cmd[F_SECT_PER_TRACK];
2179 /* determine interleave */
2181 if (_floppy->fmt_gap < 0x22)
2184 /* initialize field */
2185 for (count = 0; count < raw_cmd->cmd[F_SECT_PER_TRACK]; ++count) {
2186 here[count].track = format_req.track;
2187 here[count].head = format_req.head;
2188 here[count].sect = 0;
2189 here[count].size = raw_cmd->cmd[F_SIZECODE];
2191 /* place logical sectors */
2192 for (count = 1; count <= raw_cmd->cmd[F_SECT_PER_TRACK]; ++count) {
2193 here[n].sect = count;
2194 n = (n + il) % raw_cmd->cmd[F_SECT_PER_TRACK];
2195 if (here[n].sect) { /* sector busy, find next free sector */
2197 if (n >= raw_cmd->cmd[F_SECT_PER_TRACK]) {
2198 n -= raw_cmd->cmd[F_SECT_PER_TRACK];
2199 while (here[n].sect)
2204 if (_floppy->stretch & FD_SECTBASEMASK) {
2205 for (count = 0; count < raw_cmd->cmd[F_SECT_PER_TRACK]; count++)
2206 here[count].sect += FD_SECTBASE(_floppy) - 1;
2210 static void redo_format(void)
2213 setup_format_params(format_req.track << STRETCH(_floppy));
2215 debugt(__func__, "queue format request");
2218 static const struct cont_t format_cont = {
2219 .interrupt = format_interrupt,
2220 .redo = redo_format,
2221 .error = bad_flp_intr,
2222 .done = generic_done
2225 static int do_format(int drive, struct format_descr *tmp_format_req)
2229 if (lock_fdc(drive))
2234 _floppy->track > drive_params[current_drive].tracks ||
2235 tmp_format_req->track >= _floppy->track ||
2236 tmp_format_req->head >= _floppy->head ||
2237 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
2238 !_floppy->fmt_gap) {
2239 process_fd_request();
2242 format_req = *tmp_format_req;
2244 cont = &format_cont;
2245 errors = &format_errors;
2246 ret = wait_til_done(redo_format, true);
2249 process_fd_request();
2254 * Buffer read/write and support
2255 * =============================
2258 static void floppy_end_request(struct request *req, blk_status_t error)
2260 unsigned int nr_sectors = current_count_sectors;
2261 unsigned int drive = (unsigned long)req->rq_disk->private_data;
2263 /* current_count_sectors can be zero if transfer failed */
2265 nr_sectors = blk_rq_cur_sectors(req);
2266 if (blk_update_request(req, error, nr_sectors << 9))
2268 __blk_mq_end_request(req, error);
2270 /* We're done with the request */
2275 /* new request_done. Can handle physical sectors which are smaller than a
2277 static void request_done(int uptodate)
2279 struct request *req = current_req;
2281 char msg[sizeof("request done ") + sizeof(int) * 3];
2284 snprintf(msg, sizeof(msg), "request done %d", uptodate);
2285 reschedule_timeout(MAXTIMEOUT, msg);
2288 pr_info("floppy.c: no request in request_done\n");
2293 /* maintain values for invalidation on geometry
2295 block = current_count_sectors + blk_rq_pos(req);
2296 INFBOUND(drive_state[current_drive].maxblock, block);
2297 if (block > _floppy->sect)
2298 drive_state[current_drive].maxtrack = 1;
2300 floppy_end_request(req, 0);
2302 if (rq_data_dir(req) == WRITE) {
2303 /* record write error information */
2304 write_errors[current_drive].write_errors++;
2305 if (write_errors[current_drive].write_errors == 1) {
2306 write_errors[current_drive].first_error_sector = blk_rq_pos(req);
2307 write_errors[current_drive].first_error_generation = drive_state[current_drive].generation;
2309 write_errors[current_drive].last_error_sector = blk_rq_pos(req);
2310 write_errors[current_drive].last_error_generation = drive_state[current_drive].generation;
2312 floppy_end_request(req, BLK_STS_IOERR);
2316 /* Interrupt handler evaluating the result of the r/w operation */
2317 static void rw_interrupt(void)
2324 if (reply_buffer[R_HEAD] >= 2) {
2325 /* some Toshiba floppy controllers occasionnally seem to
2326 * return bogus interrupts after read/write operations, which
2327 * can be recognized by a bad head number (>= 2) */
2331 if (!drive_state[current_drive].first_read_date)
2332 drive_state[current_drive].first_read_date = jiffies;
2334 ssize = DIV_ROUND_UP(1 << raw_cmd->cmd[SIZECODE], 4);
2336 if (reply_buffer[ST1] & ST1_EOC)
2341 if (raw_cmd->cmd[COMMAND] & 0x80)
2346 nr_sectors = (((reply_buffer[R_TRACK] - raw_cmd->cmd[TRACK]) * heads +
2347 reply_buffer[R_HEAD] - raw_cmd->cmd[HEAD]) * raw_cmd->cmd[SECT_PER_TRACK] +
2348 reply_buffer[R_SECTOR] - raw_cmd->cmd[SECTOR] + eoc) << raw_cmd->cmd[SIZECODE] >> 2;
2350 if (nr_sectors / ssize >
2351 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) {
2352 DPRINT("long rw: %x instead of %lx\n",
2353 nr_sectors, current_count_sectors);
2354 pr_info("rs=%d s=%d\n", reply_buffer[R_SECTOR],
2355 raw_cmd->cmd[SECTOR]);
2356 pr_info("rh=%d h=%d\n", reply_buffer[R_HEAD],
2357 raw_cmd->cmd[HEAD]);
2358 pr_info("rt=%d t=%d\n", reply_buffer[R_TRACK],
2359 raw_cmd->cmd[TRACK]);
2360 pr_info("heads=%d eoc=%d\n", heads, eoc);
2361 pr_info("spt=%d st=%d ss=%d\n",
2362 raw_cmd->cmd[SECT_PER_TRACK], fsector_t, ssize);
2363 pr_info("in_sector_offset=%d\n", in_sector_offset);
2366 nr_sectors -= in_sector_offset;
2367 INFBOUND(nr_sectors, 0);
2368 SUPBOUND(current_count_sectors, nr_sectors);
2370 switch (interpret_errors()) {
2375 if (!current_count_sectors) {
2382 if (!current_count_sectors) {
2386 current_type[current_drive] = _floppy;
2387 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2392 if (drive_params[current_drive].flags & FTD_MSG)
2393 DPRINT("Auto-detected floppy type %s in fd%d\n",
2394 _floppy->name, current_drive);
2395 current_type[current_drive] = _floppy;
2396 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2400 if (CT(raw_cmd->cmd[COMMAND]) != FD_READ) {
2401 /* transfer directly from buffer */
2404 buffer_track = raw_cmd->track;
2405 buffer_drive = current_drive;
2406 INFBOUND(buffer_max, nr_sectors + fsector_t);
2411 /* Compute the maximal transfer size */
2412 static int transfer_size(int ssize, int max_sector, int max_size)
2414 SUPBOUND(max_sector, fsector_t + max_size);
2417 max_sector -= (max_sector % _floppy->sect) % ssize;
2419 /* transfer size, beginning not aligned */
2420 current_count_sectors = max_sector - fsector_t;
2426 * Move data from/to the track buffer to/from the buffer cache.
2428 static void copy_buffer(int ssize, int max_sector, int max_sector_2)
2430 int remaining; /* number of transferred 512-byte sectors */
2434 struct req_iterator iter;
2436 max_sector = transfer_size(ssize,
2437 min(max_sector, max_sector_2),
2438 blk_rq_sectors(current_req));
2440 if (current_count_sectors <= 0 && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE &&
2441 buffer_max > fsector_t + blk_rq_sectors(current_req))
2442 current_count_sectors = min_t(int, buffer_max - fsector_t,
2443 blk_rq_sectors(current_req));
2445 remaining = current_count_sectors << 9;
2446 if (remaining > blk_rq_bytes(current_req) && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) {
2447 DPRINT("in copy buffer\n");
2448 pr_info("current_count_sectors=%ld\n", current_count_sectors);
2449 pr_info("remaining=%d\n", remaining >> 9);
2450 pr_info("current_req->nr_sectors=%u\n",
2451 blk_rq_sectors(current_req));
2452 pr_info("current_req->current_nr_sectors=%u\n",
2453 blk_rq_cur_sectors(current_req));
2454 pr_info("max_sector=%d\n", max_sector);
2455 pr_info("ssize=%d\n", ssize);
2458 buffer_max = max(max_sector, buffer_max);
2460 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
2462 size = blk_rq_cur_bytes(current_req);
2464 rq_for_each_segment(bv, current_req, iter) {
2469 SUPBOUND(size, remaining);
2470 if (dma_buffer + size >
2471 floppy_track_buffer + (max_buffer_sectors << 10) ||
2472 dma_buffer < floppy_track_buffer) {
2473 DPRINT("buffer overrun in copy buffer %d\n",
2474 (int)((floppy_track_buffer - dma_buffer) >> 9));
2475 pr_info("fsector_t=%d buffer_min=%d\n",
2476 fsector_t, buffer_min);
2477 pr_info("current_count_sectors=%ld\n",
2478 current_count_sectors);
2479 if (CT(raw_cmd->cmd[COMMAND]) == FD_READ)
2481 if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE)
2486 if (CT(raw_cmd->cmd[COMMAND]) == FD_READ)
2487 memcpy_to_page(bv.bv_page, bv.bv_offset, dma_buffer,
2490 memcpy_from_page(dma_buffer, bv.bv_page, bv.bv_offset,
2498 max_sector -= remaining >> 9;
2499 DPRINT("weirdness: remaining %d\n", remaining >> 9);
2503 /* work around a bug in pseudo DMA
2504 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2505 * sending data. Hence we need a different way to signal the
2506 * transfer length: We use raw_cmd->cmd[SECT_PER_TRACK]. Unfortunately, this
2507 * does not work with MT, hence we can only transfer one head at
2510 static void virtualdmabug_workaround(void)
2515 if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) {
2516 raw_cmd->cmd[COMMAND] &= ~0x80; /* switch off multiple track mode */
2518 hard_sectors = raw_cmd->length >> (7 + raw_cmd->cmd[SIZECODE]);
2519 end_sector = raw_cmd->cmd[SECTOR] + hard_sectors - 1;
2520 if (end_sector > raw_cmd->cmd[SECT_PER_TRACK]) {
2521 pr_info("too many sectors %d > %d\n",
2522 end_sector, raw_cmd->cmd[SECT_PER_TRACK]);
2525 raw_cmd->cmd[SECT_PER_TRACK] = end_sector;
2526 /* make sure raw_cmd->cmd[SECT_PER_TRACK]
2527 * points to end of transfer */
2532 * Formulate a read/write request.
2533 * this routine decides where to load the data (directly to buffer, or to
2534 * tmp floppy area), how much data to load (the size of the buffer, the whole
2535 * track, or a single sector)
2536 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2537 * allocation on the fly, it should be done here. No other part should need
2541 static int make_raw_rw_request(void)
2543 int aligned_sector_t;
2549 if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n"))
2552 set_fdc((long)current_req->rq_disk->private_data);
2554 raw_cmd = &default_raw_cmd;
2555 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK;
2556 raw_cmd->cmd_count = NR_RW;
2557 if (rq_data_dir(current_req) == READ) {
2558 raw_cmd->flags |= FD_RAW_READ;
2559 raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_READ);
2560 } else if (rq_data_dir(current_req) == WRITE) {
2561 raw_cmd->flags |= FD_RAW_WRITE;
2562 raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_WRITE);
2564 DPRINT("%s: unknown command\n", __func__);
2568 max_sector = _floppy->sect * _floppy->head;
2570 raw_cmd->cmd[TRACK] = (int)blk_rq_pos(current_req) / max_sector;
2571 fsector_t = (int)blk_rq_pos(current_req) % max_sector;
2572 if (_floppy->track && raw_cmd->cmd[TRACK] >= _floppy->track) {
2573 if (blk_rq_cur_sectors(current_req) & 1) {
2574 current_count_sectors = 1;
2579 raw_cmd->cmd[HEAD] = fsector_t / _floppy->sect;
2581 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) ||
2582 test_bit(FD_NEED_TWADDLE_BIT, &drive_state[current_drive].flags)) &&
2583 fsector_t < _floppy->sect)
2584 max_sector = _floppy->sect;
2586 /* 2M disks have phantom sectors on the first track */
2587 if ((_floppy->rate & FD_2M) && (!raw_cmd->cmd[TRACK]) && (!raw_cmd->cmd[HEAD])) {
2588 max_sector = 2 * _floppy->sect / 3;
2589 if (fsector_t >= max_sector) {
2590 current_count_sectors =
2591 min_t(int, _floppy->sect - fsector_t,
2592 blk_rq_sectors(current_req));
2595 raw_cmd->cmd[SIZECODE] = 2;
2597 raw_cmd->cmd[SIZECODE] = FD_SIZECODE(_floppy);
2598 raw_cmd->rate = _floppy->rate & 0x43;
2599 if ((_floppy->rate & FD_2M) &&
2600 (raw_cmd->cmd[TRACK] || raw_cmd->cmd[HEAD]) && raw_cmd->rate == 2)
2603 if (raw_cmd->cmd[SIZECODE])
2604 raw_cmd->cmd[SIZECODE2] = 0xff;
2606 raw_cmd->cmd[SIZECODE2] = 0x80;
2607 raw_cmd->track = raw_cmd->cmd[TRACK] << STRETCH(_floppy);
2608 raw_cmd->cmd[DR_SELECT] = UNIT(current_drive) + PH_HEAD(_floppy, raw_cmd->cmd[HEAD]);
2609 raw_cmd->cmd[GAP] = _floppy->gap;
2610 ssize = DIV_ROUND_UP(1 << raw_cmd->cmd[SIZECODE], 4);
2611 raw_cmd->cmd[SECT_PER_TRACK] = _floppy->sect << 2 >> raw_cmd->cmd[SIZECODE];
2612 raw_cmd->cmd[SECTOR] = ((fsector_t % _floppy->sect) << 2 >> raw_cmd->cmd[SIZECODE]) +
2613 FD_SECTBASE(_floppy);
2615 /* tracksize describes the size which can be filled up with sectors
2618 tracksize = _floppy->sect - _floppy->sect % ssize;
2619 if (tracksize < _floppy->sect) {
2620 raw_cmd->cmd[SECT_PER_TRACK]++;
2621 if (tracksize <= fsector_t % _floppy->sect)
2622 raw_cmd->cmd[SECTOR]--;
2624 /* if we are beyond tracksize, fill up using smaller sectors */
2625 while (tracksize <= fsector_t % _floppy->sect) {
2626 while (tracksize + ssize > _floppy->sect) {
2627 raw_cmd->cmd[SIZECODE]--;
2630 raw_cmd->cmd[SECTOR]++;
2631 raw_cmd->cmd[SECT_PER_TRACK]++;
2634 max_sector = raw_cmd->cmd[HEAD] * _floppy->sect + tracksize;
2635 } else if (!raw_cmd->cmd[TRACK] && !raw_cmd->cmd[HEAD] && !(_floppy->rate & FD_2M) && probing) {
2636 max_sector = _floppy->sect;
2637 } else if (!raw_cmd->cmd[HEAD] && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) {
2638 /* for virtual DMA bug workaround */
2639 max_sector = _floppy->sect;
2642 in_sector_offset = (fsector_t % _floppy->sect) % ssize;
2643 aligned_sector_t = fsector_t - in_sector_offset;
2644 max_size = blk_rq_sectors(current_req);
2645 if ((raw_cmd->track == buffer_track) &&
2646 (current_drive == buffer_drive) &&
2647 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
2648 /* data already in track buffer */
2649 if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) {
2650 copy_buffer(1, max_sector, buffer_max);
2653 } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) {
2654 if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) {
2655 unsigned int sectors;
2657 sectors = fsector_t + blk_rq_sectors(current_req);
2658 if (sectors > ssize && sectors < ssize + ssize)
2659 max_size = ssize + ssize;
2663 raw_cmd->flags &= ~FD_RAW_WRITE;
2664 raw_cmd->flags |= FD_RAW_READ;
2665 raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_READ);
2668 if (CT(raw_cmd->cmd[COMMAND]) == FD_READ)
2669 max_size = max_sector; /* unbounded */
2671 /* claim buffer track if needed */
2672 if (buffer_track != raw_cmd->track || /* bad track */
2673 buffer_drive != current_drive || /* bad drive */
2674 fsector_t > buffer_max ||
2675 fsector_t < buffer_min ||
2676 ((CT(raw_cmd->cmd[COMMAND]) == FD_READ ||
2677 (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) &&
2678 max_sector > 2 * max_buffer_sectors + buffer_min &&
2679 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) {
2680 /* not enough space */
2682 buffer_drive = current_drive;
2683 buffer_max = buffer_min = aligned_sector_t;
2685 raw_cmd->kernel_data = floppy_track_buffer +
2686 ((aligned_sector_t - buffer_min) << 9);
2688 if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) {
2689 /* copy write buffer to track buffer.
2690 * if we get here, we know that the write
2691 * is either aligned or the data already in the buffer
2692 * (buffer will be overwritten) */
2693 if (in_sector_offset && buffer_track == -1)
2694 DPRINT("internal error offset !=0 on write\n");
2695 buffer_track = raw_cmd->track;
2696 buffer_drive = current_drive;
2697 copy_buffer(ssize, max_sector,
2698 2 * max_buffer_sectors + buffer_min);
2700 transfer_size(ssize, max_sector,
2701 2 * max_buffer_sectors + buffer_min -
2704 /* round up current_count_sectors to get dma xfer size */
2705 raw_cmd->length = in_sector_offset + current_count_sectors;
2706 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1;
2707 raw_cmd->length <<= 9;
2708 if ((raw_cmd->length < current_count_sectors << 9) ||
2709 (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE &&
2710 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
2711 aligned_sector_t < buffer_min)) ||
2712 raw_cmd->length % (128 << raw_cmd->cmd[SIZECODE]) ||
2713 raw_cmd->length <= 0 || current_count_sectors <= 0) {
2714 DPRINT("fractionary current count b=%lx s=%lx\n",
2715 raw_cmd->length, current_count_sectors);
2716 pr_info("addr=%d, length=%ld\n",
2717 (int)((raw_cmd->kernel_data -
2718 floppy_track_buffer) >> 9),
2719 current_count_sectors);
2720 pr_info("st=%d ast=%d mse=%d msi=%d\n",
2721 fsector_t, aligned_sector_t, max_sector, max_size);
2722 pr_info("ssize=%x SIZECODE=%d\n", ssize, raw_cmd->cmd[SIZECODE]);
2723 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2724 raw_cmd->cmd[COMMAND], raw_cmd->cmd[SECTOR],
2725 raw_cmd->cmd[HEAD], raw_cmd->cmd[TRACK]);
2726 pr_info("buffer drive=%d\n", buffer_drive);
2727 pr_info("buffer track=%d\n", buffer_track);
2728 pr_info("buffer_min=%d\n", buffer_min);
2729 pr_info("buffer_max=%d\n", buffer_max);
2733 if (raw_cmd->kernel_data < floppy_track_buffer ||
2734 current_count_sectors < 0 ||
2735 raw_cmd->length < 0 ||
2736 raw_cmd->kernel_data + raw_cmd->length >
2737 floppy_track_buffer + (max_buffer_sectors << 10)) {
2738 DPRINT("buffer overrun in schedule dma\n");
2739 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n",
2740 fsector_t, buffer_min, raw_cmd->length >> 9);
2741 pr_info("current_count_sectors=%ld\n",
2742 current_count_sectors);
2743 if (CT(raw_cmd->cmd[COMMAND]) == FD_READ)
2745 if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE)
2749 if (raw_cmd->length == 0) {
2750 DPRINT("zero dma transfer attempted from make_raw_request\n");
2754 virtualdmabug_workaround();
2758 static int set_next_request(void)
2760 current_req = list_first_entry_or_null(&floppy_reqs, struct request,
2763 current_req->error_count = 0;
2764 list_del_init(¤t_req->queuelist);
2766 return current_req != NULL;
2769 /* Starts or continues processing request. Will automatically unlock the
2770 * driver at end of request.
2772 static void redo_fd_request(void)
2778 if (current_drive < N_DRIVE)
2779 floppy_off(current_drive);
2785 spin_lock_irq(&floppy_lock);
2786 pending = set_next_request();
2787 spin_unlock_irq(&floppy_lock);
2794 drive = (long)current_req->rq_disk->private_data;
2796 reschedule_timeout(current_drive, "redo fd request");
2799 raw_cmd = &default_raw_cmd;
2801 if (start_motor(redo_fd_request))
2804 disk_change(current_drive);
2805 if (test_bit(current_drive, &fake_change) ||
2806 test_bit(FD_DISK_CHANGED_BIT, &drive_state[current_drive].flags)) {
2807 DPRINT("disk absent or changed during operation\n");
2811 if (!_floppy) { /* Autodetection */
2813 drive_state[current_drive].probed_format = 0;
2814 if (next_valid_format(current_drive)) {
2815 DPRINT("no autodetectable formats\n");
2822 _floppy = floppy_type + drive_params[current_drive].autodetect[drive_state[current_drive].probed_format];
2825 errors = &(current_req->error_count);
2826 tmp = make_raw_rw_request();
2832 if (test_bit(FD_NEED_TWADDLE_BIT, &drive_state[current_drive].flags))
2833 twaddle(current_fdc, current_drive);
2834 schedule_bh(floppy_start);
2835 debugt(__func__, "queue fd request");
2839 static const struct cont_t rw_cont = {
2840 .interrupt = rw_interrupt,
2841 .redo = redo_fd_request,
2842 .error = bad_flp_intr,
2843 .done = request_done
2846 /* schedule the request and automatically unlock the driver on completion */
2847 static void process_fd_request(void)
2850 schedule_bh(redo_fd_request);
2853 static blk_status_t floppy_queue_rq(struct blk_mq_hw_ctx *hctx,
2854 const struct blk_mq_queue_data *bd)
2856 blk_mq_start_request(bd->rq);
2858 if (WARN(max_buffer_sectors == 0,
2859 "VFS: %s called on non-open device\n", __func__))
2860 return BLK_STS_IOERR;
2862 if (WARN(atomic_read(&usage_count) == 0,
2863 "warning: usage count=0, current_req=%p sect=%ld flags=%llx\n",
2864 current_req, (long)blk_rq_pos(current_req),
2865 (unsigned long long) current_req->cmd_flags))
2866 return BLK_STS_IOERR;
2868 if (test_and_set_bit(0, &fdc_busy)) {
2869 /* fdc busy, this new request will be treated when the
2870 current one is done */
2871 is_alive(__func__, "old request running");
2872 return BLK_STS_RESOURCE;
2875 spin_lock_irq(&floppy_lock);
2876 list_add_tail(&bd->rq->queuelist, &floppy_reqs);
2877 spin_unlock_irq(&floppy_lock);
2879 command_status = FD_COMMAND_NONE;
2880 __reschedule_timeout(MAXTIMEOUT, "fd_request");
2882 process_fd_request();
2883 is_alive(__func__, "");
2887 static const struct cont_t poll_cont = {
2888 .interrupt = success_and_wakeup,
2889 .redo = floppy_ready,
2890 .error = generic_failure,
2891 .done = generic_done
2894 static int poll_drive(bool interruptible, int flag)
2896 /* no auto-sense, just clear dcl */
2897 raw_cmd = &default_raw_cmd;
2898 raw_cmd->flags = flag;
2900 raw_cmd->cmd_count = 0;
2902 debug_dcl(drive_params[current_drive].flags,
2903 "setting NEWCHANGE in poll_drive\n");
2904 set_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[current_drive].flags);
2906 return wait_til_done(floppy_ready, interruptible);
2910 * User triggered reset
2911 * ====================
2914 static void reset_intr(void)
2916 pr_info("weird, reset interrupt called\n");
2919 static const struct cont_t reset_cont = {
2920 .interrupt = reset_intr,
2921 .redo = success_and_wakeup,
2922 .error = generic_failure,
2923 .done = generic_done
2927 * Resets the FDC connected to drive <drive>.
2928 * Both current_drive and current_fdc are changed to match the new drive.
2930 static int user_reset_fdc(int drive, int arg, bool interruptible)
2934 if (lock_fdc(drive))
2937 if (arg == FD_RESET_ALWAYS)
2938 fdc_state[current_fdc].reset = 1;
2939 if (fdc_state[current_fdc].reset) {
2940 /* note: reset_fdc will take care of unlocking the driver
2944 ret = wait_til_done(reset_fdc, interruptible);
2948 process_fd_request();
2953 * Misc Ioctl's and support
2954 * ========================
2956 static inline int fd_copyout(void __user *param, const void *address,
2959 return copy_to_user(param, address, size) ? -EFAULT : 0;
2962 static inline int fd_copyin(void __user *param, void *address,
2965 return copy_from_user(address, param, size) ? -EFAULT : 0;
2968 static const char *drive_name(int type, int drive)
2970 struct floppy_struct *floppy;
2973 floppy = floppy_type + type;
2975 if (drive_params[drive].native_format)
2976 floppy = floppy_type + drive_params[drive].native_format;
2981 return floppy->name;
2987 static void raw_cmd_done(int flag)
2990 raw_cmd->flags |= FD_RAW_FAILURE;
2991 raw_cmd->flags |= FD_RAW_HARDFAILURE;
2993 raw_cmd->reply_count = inr;
2994 if (raw_cmd->reply_count > FD_RAW_REPLY_SIZE)
2995 raw_cmd->reply_count = 0;
2996 memcpy(raw_cmd->reply, reply_buffer, raw_cmd->reply_count);
2998 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
2999 unsigned long flags;
3000 flags = claim_dma_lock();
3001 raw_cmd->length = fd_get_dma_residue();
3002 release_dma_lock(flags);
3005 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
3006 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
3007 raw_cmd->flags |= FD_RAW_FAILURE;
3009 if (disk_change(current_drive))
3010 raw_cmd->flags |= FD_RAW_DISK_CHANGE;
3012 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
3013 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
3014 motor_off_callback(&motor_off_timer[current_drive]);
3016 if (raw_cmd->next &&
3017 (!(raw_cmd->flags & FD_RAW_FAILURE) ||
3018 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
3019 ((raw_cmd->flags & FD_RAW_FAILURE) ||
3020 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) {
3021 raw_cmd = raw_cmd->next;
3028 static const struct cont_t raw_cmd_cont = {
3029 .interrupt = success_and_wakeup,
3030 .redo = floppy_start,
3031 .error = generic_failure,
3032 .done = raw_cmd_done
3035 static int raw_cmd_copyout(int cmd, void __user *param,
3036 struct floppy_raw_cmd *ptr)
3041 struct floppy_raw_cmd cmd = *ptr;
3043 cmd.kernel_data = NULL;
3044 ret = copy_to_user(param, &cmd, sizeof(cmd));
3047 param += sizeof(struct floppy_raw_cmd);
3048 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) {
3049 if (ptr->length >= 0 &&
3050 ptr->length <= ptr->buffer_length) {
3051 long length = ptr->buffer_length - ptr->length;
3052 ret = fd_copyout(ptr->data, ptr->kernel_data,
3064 static void raw_cmd_free(struct floppy_raw_cmd **ptr)
3066 struct floppy_raw_cmd *next;
3067 struct floppy_raw_cmd *this;
3072 if (this->buffer_length) {
3073 fd_dma_mem_free((unsigned long)this->kernel_data,
3074 this->buffer_length);
3075 this->buffer_length = 0;
3083 #define MAX_LEN (1UL << MAX_ORDER << PAGE_SHIFT)
3085 static int raw_cmd_copyin(int cmd, void __user *param,
3086 struct floppy_raw_cmd **rcmd)
3088 struct floppy_raw_cmd *ptr;
3094 ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_KERNEL);
3098 ret = copy_from_user(ptr, param, sizeof(*ptr));
3100 ptr->buffer_length = 0;
3101 ptr->kernel_data = NULL;
3104 param += sizeof(struct floppy_raw_cmd);
3105 if (ptr->cmd_count > FD_RAW_CMD_FULLSIZE)
3108 memset(ptr->reply, 0, FD_RAW_REPLY_SIZE);
3109 ptr->resultcode = 0;
3111 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3112 if (ptr->length <= 0 || ptr->length >= MAX_LEN)
3114 ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length);
3115 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
3116 if (!ptr->kernel_data)
3118 ptr->buffer_length = ptr->length;
3120 if (ptr->flags & FD_RAW_WRITE) {
3121 ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length);
3126 if (ptr->flags & FD_RAW_MORE) {
3127 rcmd = &(ptr->next);
3135 static int raw_cmd_ioctl(int cmd, void __user *param)
3137 struct floppy_raw_cmd *my_raw_cmd;
3142 if (fdc_state[current_fdc].rawcmd <= 1)
3143 fdc_state[current_fdc].rawcmd = 1;
3144 for (drive = 0; drive < N_DRIVE; drive++) {
3145 if (FDC(drive) != current_fdc)
3147 if (drive == current_drive) {
3148 if (drive_state[drive].fd_ref > 1) {
3149 fdc_state[current_fdc].rawcmd = 2;
3152 } else if (drive_state[drive].fd_ref) {
3153 fdc_state[current_fdc].rawcmd = 2;
3158 if (fdc_state[current_fdc].reset)
3161 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
3163 raw_cmd_free(&my_raw_cmd);
3167 raw_cmd = my_raw_cmd;
3168 cont = &raw_cmd_cont;
3169 ret = wait_til_done(floppy_start, true);
3170 debug_dcl(drive_params[current_drive].flags,
3171 "calling disk change from raw_cmd ioctl\n");
3173 if (ret != -EINTR && fdc_state[current_fdc].reset)
3176 drive_state[current_drive].track = NO_TRACK;
3178 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
3181 raw_cmd_free(&my_raw_cmd);
3185 static int invalidate_drive(struct block_device *bdev)
3187 /* invalidate the buffer track to force a reread */
3188 set_bit((long)bdev->bd_disk->private_data, &fake_change);
3189 process_fd_request();
3190 if (bdev_check_media_change(bdev))
3191 floppy_revalidate(bdev->bd_disk);
3195 static int set_geometry(unsigned int cmd, struct floppy_struct *g,
3196 int drive, int type, struct block_device *bdev)
3200 /* sanity checking for parameters. */
3201 if ((int)g->sect <= 0 ||
3202 (int)g->head <= 0 ||
3203 /* check for overflow in max_sector */
3204 (int)(g->sect * g->head) <= 0 ||
3205 /* check for zero in raw_cmd->cmd[F_SECT_PER_TRACK] */
3206 (unsigned char)((g->sect << 2) >> FD_SIZECODE(g)) == 0 ||
3207 g->track <= 0 || g->track > drive_params[drive].tracks >> STRETCH(g) ||
3208 /* check if reserved bits are set */
3209 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0)
3212 if (!capable(CAP_SYS_ADMIN))
3214 mutex_lock(&open_lock);
3215 if (lock_fdc(drive)) {
3216 mutex_unlock(&open_lock);
3219 floppy_type[type] = *g;
3220 floppy_type[type].name = "user format";
3221 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
3222 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] =
3223 floppy_type[type].size + 1;
3224 process_fd_request();
3225 for (cnt = 0; cnt < N_DRIVE; cnt++) {
3226 struct block_device *bdev = opened_bdev[cnt];
3227 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
3229 __invalidate_device(bdev, true);
3231 mutex_unlock(&open_lock);
3235 if (lock_fdc(drive))
3237 if (cmd != FDDEFPRM) {
3238 /* notice a disk change immediately, else
3239 * we lose our settings immediately*/
3240 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3243 oldStretch = g->stretch;
3244 user_params[drive] = *g;
3245 if (buffer_drive == drive)
3246 SUPBOUND(buffer_max, user_params[drive].sect);
3247 current_type[drive] = &user_params[drive];
3248 floppy_sizes[drive] = user_params[drive].size;
3249 if (cmd == FDDEFPRM)
3250 drive_state[current_drive].keep_data = -1;
3252 drive_state[current_drive].keep_data = 1;
3253 /* invalidation. Invalidate only when needed, i.e.
3254 * when there are already sectors in the buffer cache
3255 * whose number will change. This is useful, because
3256 * mtools often changes the geometry of the disk after
3257 * looking at the boot block */
3258 if (drive_state[current_drive].maxblock > user_params[drive].sect ||
3259 drive_state[current_drive].maxtrack ||
3260 ((user_params[drive].sect ^ oldStretch) &
3261 (FD_SWAPSIDES | FD_SECTBASEMASK)))
3262 invalidate_drive(bdev);
3264 process_fd_request();
3269 /* handle obsolete ioctl's */
3270 static unsigned int ioctl_table[] = {
3298 static int normalize_ioctl(unsigned int *cmd, int *size)
3302 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) {
3303 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) {
3304 *size = _IOC_SIZE(*cmd);
3305 *cmd = ioctl_table[i];
3306 if (*size > _IOC_SIZE(*cmd)) {
3307 pr_info("ioctl not yet supported\n");
3316 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
3319 *g = &floppy_type[type];
3321 if (lock_fdc(drive))
3323 if (poll_drive(false, 0) == -EINTR)
3325 process_fd_request();
3326 *g = current_type[drive];
3333 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
3335 int drive = (long)bdev->bd_disk->private_data;
3336 int type = ITYPE(drive_state[drive].fd_device);
3337 struct floppy_struct *g;
3340 ret = get_floppy_geometry(drive, type, &g);
3344 geo->heads = g->head;
3345 geo->sectors = g->sect;
3346 geo->cylinders = g->track;
3350 static bool valid_floppy_drive_params(const short autodetect[FD_AUTODETECT_SIZE],
3353 size_t floppy_type_size = ARRAY_SIZE(floppy_type);
3356 for (i = 0; i < FD_AUTODETECT_SIZE; ++i) {
3357 if (autodetect[i] < 0 ||
3358 autodetect[i] >= floppy_type_size)
3362 if (native_format < 0 || native_format >= floppy_type_size)
3368 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3369 unsigned long param)
3371 int drive = (long)bdev->bd_disk->private_data;
3372 int type = ITYPE(drive_state[drive].fd_device);
3377 struct floppy_struct g; /* geometry */
3378 struct format_descr f;
3379 struct floppy_max_errors max_errors;
3380 struct floppy_drive_params dp;
3381 } inparam; /* parameters coming from user space */
3382 const void *outparam; /* parameters passed back to user space */
3384 /* convert compatibility eject ioctls into floppy eject ioctl.
3385 * We do this in order to provide a means to eject floppy disks before
3386 * installing the new fdutils package */
3387 if (cmd == CDROMEJECT || /* CD-ROM eject */
3388 cmd == 0x6470) { /* SunOS floppy eject */
3389 DPRINT("obsolete eject ioctl\n");
3390 DPRINT("please use floppycontrol --eject\n");
3394 if (!((cmd & 0xff00) == 0x0200))
3397 /* convert the old style command into a new style command */
3398 ret = normalize_ioctl(&cmd, &size);
3402 /* permission checks */
3403 if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) ||
3404 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
3407 if (WARN_ON(size < 0 || size > sizeof(inparam)))
3411 memset(&inparam, 0, sizeof(inparam));
3412 if (_IOC_DIR(cmd) & _IOC_WRITE) {
3413 ret = fd_copyin((void __user *)param, &inparam, size);
3420 if (drive_state[drive].fd_ref != 1)
3421 /* somebody else has this drive open */
3423 if (lock_fdc(drive))
3426 /* do the actual eject. Fails on
3427 * non-Sparc architectures */
3428 ret = fd_eject(UNIT(drive));
3430 set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags);
3431 set_bit(FD_VERIFY_BIT, &drive_state[drive].flags);
3432 process_fd_request();
3435 if (lock_fdc(drive))
3437 current_type[drive] = NULL;
3438 floppy_sizes[drive] = MAX_DISK_SIZE << 1;
3439 drive_state[drive].keep_data = 0;
3440 return invalidate_drive(bdev);
3443 return set_geometry(cmd, &inparam.g, drive, type, bdev);
3445 ret = get_floppy_geometry(drive, type,
3446 (struct floppy_struct **)&outparam);
3449 memcpy(&inparam.g, outparam,
3450 offsetof(struct floppy_struct, name));
3451 outparam = &inparam.g;
3454 drive_params[drive].flags |= FTD_MSG;
3457 drive_params[drive].flags &= ~FTD_MSG;
3460 if (lock_fdc(drive))
3462 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3464 ret = drive_state[drive].flags;
3465 process_fd_request();
3466 if (ret & FD_VERIFY)
3468 if (!(ret & FD_DISK_WRITABLE))
3472 if (drive_state[drive].fd_ref != 1)
3474 return do_format(drive, &inparam.f);
3477 if (lock_fdc(drive))
3479 return invalidate_drive(bdev);
3480 case FDSETEMSGTRESH:
3481 drive_params[drive].max_errors.reporting = (unsigned short)(param & 0x0f);
3484 outparam = &drive_params[drive].max_errors;
3487 drive_params[drive].max_errors = inparam.max_errors;
3490 outparam = drive_name(type, drive);
3491 SUPBOUND(size, strlen((const char *)outparam) + 1);
3494 if (!valid_floppy_drive_params(inparam.dp.autodetect,
3495 inparam.dp.native_format))
3497 drive_params[drive] = inparam.dp;
3500 outparam = &drive_params[drive];
3503 if (lock_fdc(drive))
3505 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3507 process_fd_request();
3510 outparam = &drive_state[drive];
3513 return user_reset_fdc(drive, (int)param, true);
3515 outparam = &fdc_state[FDC(drive)];
3518 memset(&write_errors[drive], 0, sizeof(write_errors[drive]));
3521 outparam = &write_errors[drive];
3526 if (lock_fdc(drive))
3529 i = raw_cmd_ioctl(cmd, (void __user *)param);
3532 process_fd_request();
3535 if (lock_fdc(drive))
3537 twaddle(current_fdc, current_drive);
3538 process_fd_request();
3544 if (_IOC_DIR(cmd) & _IOC_READ)
3545 return fd_copyout((void __user *)param, outparam, size);
3550 static int fd_ioctl(struct block_device *bdev, fmode_t mode,
3551 unsigned int cmd, unsigned long param)
3555 mutex_lock(&floppy_mutex);
3556 ret = fd_locked_ioctl(bdev, mode, cmd, param);
3557 mutex_unlock(&floppy_mutex);
3562 #ifdef CONFIG_COMPAT
3564 struct compat_floppy_drive_params {
3566 compat_ulong_t max_dtr;
3570 compat_ulong_t spinup;
3571 compat_ulong_t spindown;
3572 unsigned char spindown_offset;
3573 unsigned char select_delay;
3575 unsigned char tracks;
3576 compat_ulong_t timeout;
3577 unsigned char interleave_sect;
3578 struct floppy_max_errors max_errors;
3581 short autodetect[FD_AUTODETECT_SIZE];
3582 compat_int_t checkfreq;
3583 compat_int_t native_format;
3586 struct compat_floppy_drive_struct {
3588 compat_ulong_t spinup_date;
3589 compat_ulong_t select_date;
3590 compat_ulong_t first_read_date;
3591 short probed_format;
3595 compat_int_t generation;
3596 compat_int_t keep_data;
3597 compat_int_t fd_ref;
3598 compat_int_t fd_device;
3599 compat_int_t last_checked;
3600 compat_caddr_t dmabuf;
3601 compat_int_t bufblocks;
3604 struct compat_floppy_fdc_state {
3608 unsigned char version;
3610 compat_ulong_t address;
3611 unsigned int rawcmd:2;
3612 unsigned int reset:1;
3613 unsigned int need_configure:1;
3614 unsigned int perp_mode:2;
3615 unsigned int has_fifo:1;
3616 unsigned int driver_version;
3617 unsigned char track[4];
3620 struct compat_floppy_write_errors {
3621 unsigned int write_errors;
3622 compat_ulong_t first_error_sector;
3623 compat_int_t first_error_generation;
3624 compat_ulong_t last_error_sector;
3625 compat_int_t last_error_generation;
3626 compat_uint_t badness;
3629 #define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct)
3630 #define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct)
3631 #define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params)
3632 #define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params)
3633 #define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct)
3634 #define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct compat_floppy_drive_struct)
3635 #define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state)
3636 #define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors)
3638 static int compat_set_geometry(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3639 struct compat_floppy_struct __user *arg)
3641 struct floppy_struct v;
3645 BUILD_BUG_ON(offsetof(struct floppy_struct, name) !=
3646 offsetof(struct compat_floppy_struct, name));
3648 if (!(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL)))
3651 memset(&v, 0, sizeof(struct floppy_struct));
3652 if (copy_from_user(&v, arg, offsetof(struct floppy_struct, name)))
3655 mutex_lock(&floppy_mutex);
3656 drive = (long)bdev->bd_disk->private_data;
3657 type = ITYPE(drive_state[drive].fd_device);
3658 err = set_geometry(cmd == FDSETPRM32 ? FDSETPRM : FDDEFPRM,
3659 &v, drive, type, bdev);
3660 mutex_unlock(&floppy_mutex);
3664 static int compat_get_prm(int drive,
3665 struct compat_floppy_struct __user *arg)
3667 struct compat_floppy_struct v;
3668 struct floppy_struct *p;
3671 memset(&v, 0, sizeof(v));
3672 mutex_lock(&floppy_mutex);
3673 err = get_floppy_geometry(drive, ITYPE(drive_state[drive].fd_device),
3676 mutex_unlock(&floppy_mutex);
3679 memcpy(&v, p, offsetof(struct floppy_struct, name));
3680 mutex_unlock(&floppy_mutex);
3681 if (copy_to_user(arg, &v, sizeof(struct compat_floppy_struct)))
3686 static int compat_setdrvprm(int drive,
3687 struct compat_floppy_drive_params __user *arg)
3689 struct compat_floppy_drive_params v;
3691 if (!capable(CAP_SYS_ADMIN))
3693 if (copy_from_user(&v, arg, sizeof(struct compat_floppy_drive_params)))
3695 if (!valid_floppy_drive_params(v.autodetect, v.native_format))
3697 mutex_lock(&floppy_mutex);
3698 drive_params[drive].cmos = v.cmos;
3699 drive_params[drive].max_dtr = v.max_dtr;
3700 drive_params[drive].hlt = v.hlt;
3701 drive_params[drive].hut = v.hut;
3702 drive_params[drive].srt = v.srt;
3703 drive_params[drive].spinup = v.spinup;
3704 drive_params[drive].spindown = v.spindown;
3705 drive_params[drive].spindown_offset = v.spindown_offset;
3706 drive_params[drive].select_delay = v.select_delay;
3707 drive_params[drive].rps = v.rps;
3708 drive_params[drive].tracks = v.tracks;
3709 drive_params[drive].timeout = v.timeout;
3710 drive_params[drive].interleave_sect = v.interleave_sect;
3711 drive_params[drive].max_errors = v.max_errors;
3712 drive_params[drive].flags = v.flags;
3713 drive_params[drive].read_track = v.read_track;
3714 memcpy(drive_params[drive].autodetect, v.autodetect,
3715 sizeof(v.autodetect));
3716 drive_params[drive].checkfreq = v.checkfreq;
3717 drive_params[drive].native_format = v.native_format;
3718 mutex_unlock(&floppy_mutex);
3722 static int compat_getdrvprm(int drive,
3723 struct compat_floppy_drive_params __user *arg)
3725 struct compat_floppy_drive_params v;
3727 memset(&v, 0, sizeof(struct compat_floppy_drive_params));
3728 mutex_lock(&floppy_mutex);
3729 v.cmos = drive_params[drive].cmos;
3730 v.max_dtr = drive_params[drive].max_dtr;
3731 v.hlt = drive_params[drive].hlt;
3732 v.hut = drive_params[drive].hut;
3733 v.srt = drive_params[drive].srt;
3734 v.spinup = drive_params[drive].spinup;
3735 v.spindown = drive_params[drive].spindown;
3736 v.spindown_offset = drive_params[drive].spindown_offset;
3737 v.select_delay = drive_params[drive].select_delay;
3738 v.rps = drive_params[drive].rps;
3739 v.tracks = drive_params[drive].tracks;
3740 v.timeout = drive_params[drive].timeout;
3741 v.interleave_sect = drive_params[drive].interleave_sect;
3742 v.max_errors = drive_params[drive].max_errors;
3743 v.flags = drive_params[drive].flags;
3744 v.read_track = drive_params[drive].read_track;
3745 memcpy(v.autodetect, drive_params[drive].autodetect,
3746 sizeof(v.autodetect));
3747 v.checkfreq = drive_params[drive].checkfreq;
3748 v.native_format = drive_params[drive].native_format;
3749 mutex_unlock(&floppy_mutex);
3751 if (copy_to_user(arg, &v, sizeof(struct compat_floppy_drive_params)))
3756 static int compat_getdrvstat(int drive, bool poll,
3757 struct compat_floppy_drive_struct __user *arg)
3759 struct compat_floppy_drive_struct v;
3761 memset(&v, 0, sizeof(struct compat_floppy_drive_struct));
3762 mutex_lock(&floppy_mutex);
3765 if (lock_fdc(drive))
3767 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3769 process_fd_request();
3771 v.spinup_date = drive_state[drive].spinup_date;
3772 v.select_date = drive_state[drive].select_date;
3773 v.first_read_date = drive_state[drive].first_read_date;
3774 v.probed_format = drive_state[drive].probed_format;
3775 v.track = drive_state[drive].track;
3776 v.maxblock = drive_state[drive].maxblock;
3777 v.maxtrack = drive_state[drive].maxtrack;
3778 v.generation = drive_state[drive].generation;
3779 v.keep_data = drive_state[drive].keep_data;
3780 v.fd_ref = drive_state[drive].fd_ref;
3781 v.fd_device = drive_state[drive].fd_device;
3782 v.last_checked = drive_state[drive].last_checked;
3783 v.dmabuf = (uintptr_t) drive_state[drive].dmabuf;
3784 v.bufblocks = drive_state[drive].bufblocks;
3785 mutex_unlock(&floppy_mutex);
3787 if (copy_to_user(arg, &v, sizeof(struct compat_floppy_drive_struct)))
3791 mutex_unlock(&floppy_mutex);
3795 static int compat_getfdcstat(int drive,
3796 struct compat_floppy_fdc_state __user *arg)
3798 struct compat_floppy_fdc_state v32;
3799 struct floppy_fdc_state v;
3801 mutex_lock(&floppy_mutex);
3802 v = fdc_state[FDC(drive)];
3803 mutex_unlock(&floppy_mutex);
3805 memset(&v32, 0, sizeof(struct compat_floppy_fdc_state));
3806 v32.spec1 = v.spec1;
3807 v32.spec2 = v.spec2;
3809 v32.version = v.version;
3811 v32.address = v.address;
3812 v32.rawcmd = v.rawcmd;
3813 v32.reset = v.reset;
3814 v32.need_configure = v.need_configure;
3815 v32.perp_mode = v.perp_mode;
3816 v32.has_fifo = v.has_fifo;
3817 v32.driver_version = v.driver_version;
3818 memcpy(v32.track, v.track, 4);
3819 if (copy_to_user(arg, &v32, sizeof(struct compat_floppy_fdc_state)))
3824 static int compat_werrorget(int drive,
3825 struct compat_floppy_write_errors __user *arg)
3827 struct compat_floppy_write_errors v32;
3828 struct floppy_write_errors v;
3830 memset(&v32, 0, sizeof(struct compat_floppy_write_errors));
3831 mutex_lock(&floppy_mutex);
3832 v = write_errors[drive];
3833 mutex_unlock(&floppy_mutex);
3834 v32.write_errors = v.write_errors;
3835 v32.first_error_sector = v.first_error_sector;
3836 v32.first_error_generation = v.first_error_generation;
3837 v32.last_error_sector = v.last_error_sector;
3838 v32.last_error_generation = v.last_error_generation;
3839 v32.badness = v.badness;
3840 if (copy_to_user(arg, &v32, sizeof(struct compat_floppy_write_errors)))
3845 static int fd_compat_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3846 unsigned long param)
3848 int drive = (long)bdev->bd_disk->private_data;
3850 case CDROMEJECT: /* CD-ROM eject */
3851 case 0x6470: /* SunOS floppy eject */
3855 case FDSETEMSGTRESH:
3863 return fd_ioctl(bdev, mode, cmd, param);
3870 return fd_ioctl(bdev, mode, cmd,
3871 (unsigned long)compat_ptr(param));
3874 return compat_set_geometry(bdev, mode, cmd, compat_ptr(param));
3876 return compat_get_prm(drive, compat_ptr(param));
3878 return compat_setdrvprm(drive, compat_ptr(param));
3880 return compat_getdrvprm(drive, compat_ptr(param));
3881 case FDPOLLDRVSTAT32:
3882 return compat_getdrvstat(drive, true, compat_ptr(param));
3883 case FDGETDRVSTAT32:
3884 return compat_getdrvstat(drive, false, compat_ptr(param));
3885 case FDGETFDCSTAT32:
3886 return compat_getfdcstat(drive, compat_ptr(param));
3888 return compat_werrorget(drive, compat_ptr(param));
3894 static void __init config_types(void)
3896 bool has_drive = false;
3899 /* read drive info out of physical CMOS */
3901 if (!drive_params[drive].cmos)
3902 drive_params[drive].cmos = FLOPPY0_TYPE;
3904 if (!drive_params[drive].cmos)
3905 drive_params[drive].cmos = FLOPPY1_TYPE;
3907 /* FIXME: additional physical CMOS drive detection should go here */
3909 for (drive = 0; drive < N_DRIVE; drive++) {
3910 unsigned int type = drive_params[drive].cmos;
3911 struct floppy_drive_params *params;
3912 const char *name = NULL;
3915 if (type < ARRAY_SIZE(default_drive_params)) {
3916 params = &default_drive_params[type].params;
3918 name = default_drive_params[type].name;
3919 allowed_drive_mask |= 1 << drive;
3921 allowed_drive_mask &= ~(1 << drive);
3923 params = &default_drive_params[0].params;
3924 snprintf(temparea, sizeof(temparea),
3925 "unknown type %d (usb?)", type);
3929 const char *prepend;
3933 pr_info("Floppy drive(s):");
3938 pr_cont("%s fd%d is %s", prepend, drive, name);
3940 drive_params[drive] = *params;
3947 static void floppy_release(struct gendisk *disk, fmode_t mode)
3949 int drive = (long)disk->private_data;
3951 mutex_lock(&floppy_mutex);
3952 mutex_lock(&open_lock);
3953 if (!drive_state[drive].fd_ref--) {
3954 DPRINT("floppy_release with fd_ref == 0");
3955 drive_state[drive].fd_ref = 0;
3957 if (!drive_state[drive].fd_ref)
3958 opened_bdev[drive] = NULL;
3959 mutex_unlock(&open_lock);
3960 mutex_unlock(&floppy_mutex);
3964 * floppy_open check for aliasing (/dev/fd0 can be the same as
3965 * /dev/PS0 etc), and disallows simultaneous access to the same
3966 * drive with different device numbers.
3968 static int floppy_open(struct block_device *bdev, fmode_t mode)
3970 int drive = (long)bdev->bd_disk->private_data;
3971 int old_dev, new_dev;
3976 mutex_lock(&floppy_mutex);
3977 mutex_lock(&open_lock);
3978 old_dev = drive_state[drive].fd_device;
3979 if (opened_bdev[drive] && opened_bdev[drive] != bdev)
3982 if (!drive_state[drive].fd_ref && (drive_params[drive].flags & FD_BROKEN_DCL)) {
3983 set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags);
3984 set_bit(FD_VERIFY_BIT, &drive_state[drive].flags);
3987 drive_state[drive].fd_ref++;
3989 opened_bdev[drive] = bdev;
3993 if (!floppy_track_buffer) {
3994 /* if opening an ED drive, reserve a big buffer,
3995 * else reserve a small one */
3996 if ((drive_params[drive].cmos == 6) || (drive_params[drive].cmos == 5))
3997 try = 64; /* Only 48 actually useful */
3999 try = 32; /* Only 24 actually useful */
4001 tmp = (char *)fd_dma_mem_alloc(1024 * try);
4002 if (!tmp && !floppy_track_buffer) {
4003 try >>= 1; /* buffer only one side */
4005 tmp = (char *)fd_dma_mem_alloc(1024 * try);
4007 if (!tmp && !floppy_track_buffer)
4008 fallback_on_nodma_alloc(&tmp, 2048 * try);
4009 if (!tmp && !floppy_track_buffer) {
4010 DPRINT("Unable to allocate DMA memory\n");
4013 if (floppy_track_buffer) {
4015 fd_dma_mem_free((unsigned long)tmp, try * 1024);
4017 buffer_min = buffer_max = -1;
4018 floppy_track_buffer = tmp;
4019 max_buffer_sectors = try;
4023 new_dev = MINOR(bdev->bd_dev);
4024 drive_state[drive].fd_device = new_dev;
4025 set_capacity(disks[drive][ITYPE(new_dev)], floppy_sizes[new_dev]);
4026 if (old_dev != -1 && old_dev != new_dev) {
4027 if (buffer_drive == drive)
4031 if (fdc_state[FDC(drive)].rawcmd == 1)
4032 fdc_state[FDC(drive)].rawcmd = 2;
4034 if (!(mode & FMODE_NDELAY)) {
4035 if (mode & (FMODE_READ|FMODE_WRITE)) {
4036 drive_state[drive].last_checked = 0;
4037 clear_bit(FD_OPEN_SHOULD_FAIL_BIT,
4038 &drive_state[drive].flags);
4039 if (bdev_check_media_change(bdev))
4040 floppy_revalidate(bdev->bd_disk);
4041 if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags))
4043 if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags))
4047 if ((mode & FMODE_WRITE) &&
4048 !test_bit(FD_DISK_WRITABLE_BIT, &drive_state[drive].flags))
4051 mutex_unlock(&open_lock);
4052 mutex_unlock(&floppy_mutex);
4055 drive_state[drive].fd_ref--;
4057 if (!drive_state[drive].fd_ref)
4058 opened_bdev[drive] = NULL;
4060 mutex_unlock(&open_lock);
4061 mutex_unlock(&floppy_mutex);
4066 * Check if the disk has been changed or if a change has been faked.
4068 static unsigned int floppy_check_events(struct gendisk *disk,
4069 unsigned int clearing)
4071 int drive = (long)disk->private_data;
4073 if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) ||
4074 test_bit(FD_VERIFY_BIT, &drive_state[drive].flags))
4075 return DISK_EVENT_MEDIA_CHANGE;
4077 if (time_after(jiffies, drive_state[drive].last_checked + drive_params[drive].checkfreq)) {
4078 if (lock_fdc(drive))
4080 poll_drive(false, 0);
4081 process_fd_request();
4084 if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) ||
4085 test_bit(FD_VERIFY_BIT, &drive_state[drive].flags) ||
4086 test_bit(drive, &fake_change) ||
4087 drive_no_geom(drive))
4088 return DISK_EVENT_MEDIA_CHANGE;
4093 * This implements "read block 0" for floppy_revalidate().
4094 * Needed for format autodetection, checking whether there is
4095 * a disk in the drive, and whether that disk is writable.
4100 struct completion complete;
4103 static void floppy_rb0_cb(struct bio *bio)
4105 struct rb0_cbdata *cbdata = (struct rb0_cbdata *)bio->bi_private;
4106 int drive = cbdata->drive;
4108 if (bio->bi_status) {
4109 pr_info("floppy: error %d while reading block 0\n",
4111 set_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags);
4113 complete(&cbdata->complete);
4116 static int __floppy_read_block_0(struct block_device *bdev, int drive)
4119 struct bio_vec bio_vec;
4121 struct rb0_cbdata cbdata;
4123 page = alloc_page(GFP_NOIO);
4125 process_fd_request();
4129 cbdata.drive = drive;
4131 bio_init(&bio, &bio_vec, 1);
4132 bio_set_dev(&bio, bdev);
4133 bio_add_page(&bio, page, block_size(bdev), 0);
4135 bio.bi_iter.bi_sector = 0;
4136 bio.bi_flags |= (1 << BIO_QUIET);
4137 bio.bi_private = &cbdata;
4138 bio.bi_end_io = floppy_rb0_cb;
4139 bio_set_op_attrs(&bio, REQ_OP_READ, 0);
4141 init_completion(&cbdata.complete);
4144 process_fd_request();
4146 wait_for_completion(&cbdata.complete);
4153 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
4154 * the bootblock (block 0). "Autodetection" is also needed to check whether
4155 * there is a disk in the drive at all... Thus we also do it for fixed
4156 * geometry formats */
4157 static int floppy_revalidate(struct gendisk *disk)
4159 int drive = (long)disk->private_data;
4163 if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) ||
4164 test_bit(FD_VERIFY_BIT, &drive_state[drive].flags) ||
4165 test_bit(drive, &fake_change) ||
4166 drive_no_geom(drive)) {
4167 if (WARN(atomic_read(&usage_count) == 0,
4168 "VFS: revalidate called on non-open device.\n"))
4171 res = lock_fdc(drive);
4174 cf = (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) ||
4175 test_bit(FD_VERIFY_BIT, &drive_state[drive].flags));
4176 if (!(cf || test_bit(drive, &fake_change) || drive_no_geom(drive))) {
4177 process_fd_request(); /*already done by another thread */
4180 drive_state[drive].maxblock = 0;
4181 drive_state[drive].maxtrack = 0;
4182 if (buffer_drive == drive)
4184 clear_bit(drive, &fake_change);
4185 clear_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags);
4187 drive_state[drive].generation++;
4188 if (drive_no_geom(drive)) {
4190 res = __floppy_read_block_0(opened_bdev[drive], drive);
4193 poll_drive(false, FD_RAW_NEED_DISK);
4194 process_fd_request();
4197 set_capacity(disk, floppy_sizes[drive_state[drive].fd_device]);
4201 static const struct block_device_operations floppy_fops = {
4202 .owner = THIS_MODULE,
4203 .open = floppy_open,
4204 .release = floppy_release,
4206 .getgeo = fd_getgeo,
4207 .check_events = floppy_check_events,
4208 #ifdef CONFIG_COMPAT
4209 .compat_ioctl = fd_compat_ioctl,
4214 * Floppy Driver initialization
4215 * =============================
4218 /* Determine the floppy disk controller type */
4219 /* This routine was written by David C. Niemi */
4220 static char __init get_fdc_version(int fdc)
4224 output_byte(fdc, FD_DUMPREGS); /* 82072 and better know DUMPREGS */
4225 if (fdc_state[fdc].reset)
4229 return FDC_NONE; /* No FDC present ??? */
4230 if ((r == 1) && (reply_buffer[ST0] == 0x80)) {
4231 pr_info("FDC %d is an 8272A\n", fdc);
4232 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
4235 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
4240 if (!fdc_configure(fdc)) {
4241 pr_info("FDC %d is an 82072\n", fdc);
4242 return FDC_82072; /* 82072 doesn't know CONFIGURE */
4245 output_byte(fdc, FD_PERPENDICULAR);
4246 if (need_more_output(fdc) == MORE_OUTPUT) {
4247 output_byte(fdc, 0);
4249 pr_info("FDC %d is an 82072A\n", fdc);
4250 return FDC_82072A; /* 82072A as found on Sparcs. */
4253 output_byte(fdc, FD_UNLOCK);
4255 if ((r == 1) && (reply_buffer[ST0] == 0x80)) {
4256 pr_info("FDC %d is a pre-1991 82077\n", fdc);
4257 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
4260 if ((r != 1) || (reply_buffer[ST0] != 0x00)) {
4261 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
4265 output_byte(fdc, FD_PARTID);
4268 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
4272 if (reply_buffer[ST0] == 0x80) {
4273 pr_info("FDC %d is a post-1991 82077\n", fdc);
4274 return FDC_82077; /* Revised 82077AA passes all the tests */
4276 switch (reply_buffer[ST0] >> 5) {
4278 /* Either a 82078-1 or a 82078SL running at 5Volt */
4279 pr_info("FDC %d is an 82078.\n", fdc);
4282 pr_info("FDC %d is a 44pin 82078\n", fdc);
4285 pr_info("FDC %d is a S82078B\n", fdc);
4288 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc);
4291 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n",
4292 fdc, reply_buffer[ST0] >> 5);
4293 return FDC_82078_UNKN;
4295 } /* get_fdc_version */
4297 /* lilo configuration */
4299 static void __init floppy_set_flags(int *ints, int param, int param2)
4303 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4305 default_drive_params[i].params.flags |= param2;
4307 default_drive_params[i].params.flags &= ~param2;
4309 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param);
4312 static void __init daring(int *ints, int param, int param2)
4316 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4318 default_drive_params[i].params.select_delay = 0;
4319 default_drive_params[i].params.flags |=
4320 FD_SILENT_DCL_CLEAR;
4322 default_drive_params[i].params.select_delay =
4324 default_drive_params[i].params.flags &=
4325 ~FD_SILENT_DCL_CLEAR;
4328 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken");
4331 static void __init set_cmos(int *ints, int dummy, int dummy2)
4333 int current_drive = 0;
4336 DPRINT("wrong number of parameters for CMOS\n");
4339 current_drive = ints[1];
4340 if (current_drive < 0 || current_drive >= 8) {
4341 DPRINT("bad drive for set_cmos\n");
4345 if (current_drive >= 4 && !FDC2)
4348 drive_params[current_drive].cmos = ints[2];
4349 DPRINT("setting CMOS code to %d\n", ints[2]);
4352 static struct param_table {
4354 void (*fn) (int *ints, int param, int param2);
4358 } config_params[] __initdata = {
4359 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4360 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4361 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0},
4362 {"irq", NULL, &FLOPPY_IRQ, 6, 0},
4363 {"dma", NULL, &FLOPPY_DMA, 2, 0},
4364 {"daring", daring, NULL, 1, 0},
4366 {"two_fdc", NULL, &FDC2, 0x370, 0},
4367 {"one_fdc", NULL, &FDC2, 0, 0},
4369 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL},
4370 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL},
4371 {"messages", floppy_set_flags, NULL, 1, FTD_MSG},
4372 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR},
4373 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG},
4374 {"nodma", NULL, &can_use_virtual_dma, 1, 0},
4375 {"omnibook", NULL, &can_use_virtual_dma, 1, 0},
4376 {"yesdma", NULL, &can_use_virtual_dma, 0, 0},
4377 {"fifo_depth", NULL, &fifo_depth, 0xa, 0},
4378 {"nofifo", NULL, &no_fifo, 0x20, 0},
4379 {"usefifo", NULL, &no_fifo, 0, 0},
4380 {"cmos", set_cmos, NULL, 0, 0},
4381 {"slow", NULL, &slow_floppy, 1, 0},
4382 {"unexpected_interrupts", NULL, &print_unex, 1, 0},
4383 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0},
4384 {"L40SX", NULL, &print_unex, 0, 0}
4389 static int __init floppy_setup(char *str)
4395 str = get_options(str, ARRAY_SIZE(ints), ints);
4397 for (i = 0; i < ARRAY_SIZE(config_params); i++) {
4398 if (strcmp(str, config_params[i].name) == 0) {
4402 param = config_params[i].def_param;
4403 if (config_params[i].fn)
4404 config_params[i].fn(ints, param,
4407 if (config_params[i].var) {
4408 DPRINT("%s=%d\n", str, param);
4409 *config_params[i].var = param;
4416 DPRINT("unknown floppy option [%s]\n", str);
4418 DPRINT("allowed options are:");
4419 for (i = 0; i < ARRAY_SIZE(config_params); i++)
4420 pr_cont(" %s", config_params[i].name);
4423 DPRINT("botched floppy option\n");
4424 DPRINT("Read Documentation/admin-guide/blockdev/floppy.rst\n");
4428 static int have_no_fdc = -ENODEV;
4430 static ssize_t floppy_cmos_show(struct device *dev,
4431 struct device_attribute *attr, char *buf)
4433 struct platform_device *p = to_platform_device(dev);
4437 return sprintf(buf, "%X\n", drive_params[drive].cmos);
4440 static DEVICE_ATTR(cmos, 0444, floppy_cmos_show, NULL);
4442 static struct attribute *floppy_dev_attrs[] = {
4443 &dev_attr_cmos.attr,
4447 ATTRIBUTE_GROUPS(floppy_dev);
4449 static void floppy_device_release(struct device *dev)
4453 static int floppy_resume(struct device *dev)
4458 saved_drive = current_drive;
4459 for (fdc = 0; fdc < N_FDC; fdc++)
4460 if (fdc_state[fdc].address != -1)
4461 user_reset_fdc(REVDRIVE(fdc, 0), FD_RESET_ALWAYS, false);
4462 set_fdc(saved_drive);
4466 static const struct dev_pm_ops floppy_pm_ops = {
4467 .resume = floppy_resume,
4468 .restore = floppy_resume,
4471 static struct platform_driver floppy_driver = {
4474 .pm = &floppy_pm_ops,
4478 static const struct blk_mq_ops floppy_mq_ops = {
4479 .queue_rq = floppy_queue_rq,
4482 static struct platform_device floppy_device[N_DRIVE];
4483 static bool registered[N_DRIVE];
4485 static bool floppy_available(int drive)
4487 if (!(allowed_drive_mask & (1 << drive)))
4489 if (fdc_state[FDC(drive)].version == FDC_NONE)
4494 static int floppy_alloc_disk(unsigned int drive, unsigned int type)
4496 struct gendisk *disk;
4498 disk = blk_mq_alloc_disk(&tag_sets[drive], NULL);
4500 return PTR_ERR(disk);
4502 blk_queue_max_hw_sectors(disk->queue, 64);
4503 disk->major = FLOPPY_MAJOR;
4504 disk->first_minor = TOMINOR(drive) | (type << 2);
4506 disk->fops = &floppy_fops;
4507 disk->events = DISK_EVENT_MEDIA_CHANGE;
4509 sprintf(disk->disk_name, "fd%d_type%d", drive, type);
4511 sprintf(disk->disk_name, "fd%d", drive);
4512 /* to be cleaned up... */
4513 disk->private_data = (void *)(long)drive;
4514 disk->flags |= GENHD_FL_REMOVABLE;
4516 disks[drive][type] = disk;
4520 static DEFINE_MUTEX(floppy_probe_lock);
4522 static void floppy_probe(dev_t dev)
4524 unsigned int drive = (MINOR(dev) & 3) | ((MINOR(dev) & 0x80) >> 5);
4525 unsigned int type = (MINOR(dev) >> 2) & 0x1f;
4527 if (drive >= N_DRIVE || !floppy_available(drive) ||
4528 type >= ARRAY_SIZE(floppy_type))
4531 mutex_lock(&floppy_probe_lock);
4532 if (!disks[drive][type]) {
4533 if (floppy_alloc_disk(drive, type) == 0)
4534 add_disk(disks[drive][type]);
4536 mutex_unlock(&floppy_probe_lock);
4539 static int __init do_floppy_init(void)
4541 int i, unit, drive, err;
4544 interruptjiffies = resultjiffies = jiffies;
4546 #if defined(CONFIG_PPC)
4547 if (check_legacy_ioport(FDC1))
4553 floppy_wq = alloc_ordered_workqueue("floppy", 0);
4557 for (drive = 0; drive < N_DRIVE; drive++) {
4558 memset(&tag_sets[drive], 0, sizeof(tag_sets[drive]));
4559 tag_sets[drive].ops = &floppy_mq_ops;
4560 tag_sets[drive].nr_hw_queues = 1;
4561 tag_sets[drive].nr_maps = 1;
4562 tag_sets[drive].queue_depth = 2;
4563 tag_sets[drive].numa_node = NUMA_NO_NODE;
4564 tag_sets[drive].flags = BLK_MQ_F_SHOULD_MERGE;
4565 err = blk_mq_alloc_tag_set(&tag_sets[drive]);
4569 err = floppy_alloc_disk(drive, 0);
4573 timer_setup(&motor_off_timer[drive], motor_off_callback, 0);
4576 err = __register_blkdev(FLOPPY_MAJOR, "fd", floppy_probe);
4580 err = platform_driver_register(&floppy_driver);
4582 goto out_unreg_blkdev;
4584 for (i = 0; i < 256; i++)
4586 floppy_sizes[i] = floppy_type[ITYPE(i)].size;
4588 floppy_sizes[i] = MAX_DISK_SIZE << 1;
4590 reschedule_timeout(MAXTIMEOUT, "floppy init");
4593 for (i = 0; i < N_FDC; i++) {
4594 memset(&fdc_state[i], 0, sizeof(*fdc_state));
4595 fdc_state[i].dtr = -1;
4596 fdc_state[i].dor = 0x4;
4597 #if defined(__sparc__) || defined(__mc68000__)
4598 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4602 fdc_state[i].version = FDC_82072A;
4606 use_virtual_dma = can_use_virtual_dma & 1;
4607 fdc_state[0].address = FDC1;
4608 if (fdc_state[0].address == -1) {
4609 cancel_delayed_work(&fd_timeout);
4611 goto out_unreg_driver;
4614 fdc_state[1].address = FDC2;
4617 current_fdc = 0; /* reset fdc in case of unexpected interrupt */
4618 err = floppy_grab_irq_and_dma();
4620 cancel_delayed_work(&fd_timeout);
4622 goto out_unreg_driver;
4625 /* initialise drive state */
4626 for (drive = 0; drive < N_DRIVE; drive++) {
4627 memset(&drive_state[drive], 0, sizeof(drive_state[drive]));
4628 memset(&write_errors[drive], 0, sizeof(write_errors[drive]));
4629 set_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[drive].flags);
4630 set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags);
4631 set_bit(FD_VERIFY_BIT, &drive_state[drive].flags);
4632 drive_state[drive].fd_device = -1;
4633 floppy_track_buffer = NULL;
4634 max_buffer_sectors = 0;
4637 * Small 10 msec delay to let through any interrupt that
4638 * initialization might have triggered, to not
4639 * confuse detection:
4643 for (i = 0; i < N_FDC; i++) {
4644 fdc_state[i].driver_version = FD_DRIVER_VERSION;
4645 for (unit = 0; unit < 4; unit++)
4646 fdc_state[i].track[unit] = 0;
4647 if (fdc_state[i].address == -1)
4649 fdc_state[i].rawcmd = 2;
4650 if (user_reset_fdc(REVDRIVE(i, 0), FD_RESET_ALWAYS, false)) {
4651 /* free ioports reserved by floppy_grab_irq_and_dma() */
4652 floppy_release_regions(i);
4653 fdc_state[i].address = -1;
4654 fdc_state[i].version = FDC_NONE;
4657 /* Try to determine the floppy controller type */
4658 fdc_state[i].version = get_fdc_version(i);
4659 if (fdc_state[i].version == FDC_NONE) {
4660 /* free ioports reserved by floppy_grab_irq_and_dma() */
4661 floppy_release_regions(i);
4662 fdc_state[i].address = -1;
4665 if (can_use_virtual_dma == 2 &&
4666 fdc_state[i].version < FDC_82072A)
4667 can_use_virtual_dma = 0;
4670 /* Not all FDCs seem to be able to handle the version command
4671 * properly, so force a reset for the standard FDC clones,
4672 * to avoid interrupt garbage.
4674 user_reset_fdc(REVDRIVE(i, 0), FD_RESET_ALWAYS, false);
4677 cancel_delayed_work(&fd_timeout);
4681 DPRINT("no floppy controllers found\n");
4683 goto out_release_dma;
4686 for (drive = 0; drive < N_DRIVE; drive++) {
4687 if (!floppy_available(drive))
4690 floppy_device[drive].name = floppy_device_name;
4691 floppy_device[drive].id = drive;
4692 floppy_device[drive].dev.release = floppy_device_release;
4693 floppy_device[drive].dev.groups = floppy_dev_groups;
4695 err = platform_device_register(&floppy_device[drive]);
4697 goto out_remove_drives;
4699 registered[drive] = true;
4701 device_add_disk(&floppy_device[drive].dev, disks[drive][0],
4709 if (floppy_available(drive)) {
4710 del_gendisk(disks[drive][0]);
4711 if (registered[drive])
4712 platform_device_unregister(&floppy_device[drive]);
4716 if (atomic_read(&usage_count))
4717 floppy_release_irq_and_dma();
4719 platform_driver_unregister(&floppy_driver);
4721 unregister_blkdev(FLOPPY_MAJOR, "fd");
4723 destroy_workqueue(floppy_wq);
4724 for (drive = 0; drive < N_DRIVE; drive++) {
4725 if (!disks[drive][0])
4727 del_timer_sync(&motor_off_timer[drive]);
4728 blk_cleanup_disk(disks[drive][0]);
4729 blk_mq_free_tag_set(&tag_sets[drive]);
4735 static __init void floppy_async_init(void *data, async_cookie_t cookie)
4741 static int __init floppy_init(void)
4744 return do_floppy_init();
4746 /* Don't hold up the bootup by the floppy initialization */
4747 async_schedule(floppy_async_init, NULL);
4752 static const struct io_region {
4757 /* address + 3 is sometimes reserved by pnp bios for motherboard */
4759 /* address + 6 is reserved, and may be taken by IDE.
4760 * Unfortunately, Adaptec doesn't know this :-(, */
4764 static void floppy_release_allocated_regions(int fdc, const struct io_region *p)
4766 while (p != io_regions) {
4768 release_region(fdc_state[fdc].address + p->offset, p->size);
4772 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
4774 static int floppy_request_regions(int fdc)
4776 const struct io_region *p;
4778 for (p = io_regions; p < ARRAY_END(io_regions); p++) {
4779 if (!request_region(fdc_state[fdc].address + p->offset,
4780 p->size, "floppy")) {
4781 DPRINT("Floppy io-port 0x%04lx in use\n",
4782 fdc_state[fdc].address + p->offset);
4783 floppy_release_allocated_regions(fdc, p);
4790 static void floppy_release_regions(int fdc)
4792 floppy_release_allocated_regions(fdc, ARRAY_END(io_regions));
4795 static int floppy_grab_irq_and_dma(void)
4799 if (atomic_inc_return(&usage_count) > 1)
4803 * We might have scheduled a free_irq(), wait it to
4806 flush_workqueue(floppy_wq);
4808 if (fd_request_irq()) {
4809 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4811 atomic_dec(&usage_count);
4814 if (fd_request_dma()) {
4815 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4817 if (can_use_virtual_dma & 2)
4818 use_virtual_dma = can_use_virtual_dma = 1;
4819 if (!(can_use_virtual_dma & 1)) {
4821 atomic_dec(&usage_count);
4826 for (fdc = 0; fdc < N_FDC; fdc++) {
4827 if (fdc_state[fdc].address != -1) {
4828 if (floppy_request_regions(fdc))
4832 for (fdc = 0; fdc < N_FDC; fdc++) {
4833 if (fdc_state[fdc].address != -1) {
4834 reset_fdc_info(fdc, 1);
4835 fdc_outb(fdc_state[fdc].dor, fdc, FD_DOR);
4839 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4841 for (fdc = 0; fdc < N_FDC; fdc++)
4842 if (fdc_state[fdc].address != -1)
4843 fdc_outb(fdc_state[fdc].dor, fdc, FD_DOR);
4845 * The driver will try and free resources and relies on us
4846 * to know if they were allocated or not.
4849 irqdma_allocated = 1;
4855 floppy_release_regions(fdc);
4857 atomic_dec(&usage_count);
4861 static void floppy_release_irq_and_dma(void)
4868 unsigned long tmpaddr;
4870 if (!atomic_dec_and_test(&usage_count))
4873 if (irqdma_allocated) {
4877 irqdma_allocated = 0;
4884 if (floppy_track_buffer && max_buffer_sectors) {
4885 tmpsize = max_buffer_sectors * 1024;
4886 tmpaddr = (unsigned long)floppy_track_buffer;
4887 floppy_track_buffer = NULL;
4888 max_buffer_sectors = 0;
4889 buffer_min = buffer_max = -1;
4890 fd_dma_mem_free(tmpaddr, tmpsize);
4893 for (drive = 0; drive < N_FDC * 4; drive++)
4894 if (timer_pending(motor_off_timer + drive))
4895 pr_info("motor off timer %d still active\n", drive);
4898 if (delayed_work_pending(&fd_timeout))
4899 pr_info("floppy timer still active:%s\n", timeout_message);
4900 if (delayed_work_pending(&fd_timer))
4901 pr_info("auxiliary floppy timer still active\n");
4902 if (work_pending(&floppy_work))
4903 pr_info("work still pending\n");
4904 for (fdc = 0; fdc < N_FDC; fdc++)
4905 if (fdc_state[fdc].address != -1)
4906 floppy_release_regions(fdc);
4911 static char *floppy;
4913 static void __init parse_floppy_cfg_string(char *cfg)
4919 while (*cfg && *cfg != ' ' && *cfg != '\t')
4930 static int __init floppy_module_init(void)
4933 parse_floppy_cfg_string(floppy);
4934 return floppy_init();
4936 module_init(floppy_module_init);
4938 static void __exit floppy_module_exit(void)
4942 unregister_blkdev(FLOPPY_MAJOR, "fd");
4943 platform_driver_unregister(&floppy_driver);
4945 destroy_workqueue(floppy_wq);
4947 for (drive = 0; drive < N_DRIVE; drive++) {
4948 del_timer_sync(&motor_off_timer[drive]);
4950 if (floppy_available(drive)) {
4951 for (i = 0; i < ARRAY_SIZE(floppy_type); i++) {
4952 if (disks[drive][i])
4953 del_gendisk(disks[drive][i]);
4955 if (registered[drive])
4956 platform_device_unregister(&floppy_device[drive]);
4958 for (i = 0; i < ARRAY_SIZE(floppy_type); i++) {
4959 if (disks[drive][i])
4960 blk_cleanup_queue(disks[drive][i]->queue);
4962 blk_mq_free_tag_set(&tag_sets[drive]);
4965 * These disks have not called add_disk(). Don't put down
4966 * queue reference in put_disk().
4968 if (!(allowed_drive_mask & (1 << drive)) ||
4969 fdc_state[FDC(drive)].version == FDC_NONE) {
4970 for (i = 0; i < ARRAY_SIZE(floppy_type); i++) {
4971 if (disks[drive][i])
4972 disks[drive][i]->queue = NULL;
4976 for (i = 0; i < ARRAY_SIZE(floppy_type); i++) {
4977 if (disks[drive][i])
4978 put_disk(disks[drive][i]);
4982 cancel_delayed_work_sync(&fd_timeout);
4983 cancel_delayed_work_sync(&fd_timer);
4985 if (atomic_read(&usage_count))
4986 floppy_release_irq_and_dma();
4988 /* eject disk, if any */
4992 module_exit(floppy_module_exit);
4994 module_param(floppy, charp, 0);
4995 module_param(FLOPPY_IRQ, int, 0);
4996 module_param(FLOPPY_DMA, int, 0);
4997 MODULE_AUTHOR("Alain L. Knaff");
4998 MODULE_LICENSE("GPL");
5000 /* This doesn't actually get used other than for module information */
5001 static const struct pnp_device_id floppy_pnpids[] = {
5006 MODULE_DEVICE_TABLE(pnp, floppy_pnpids);
5010 __setup("floppy=", floppy_setup);
5011 module_init(floppy_init)
5014 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);