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 #undef FLOPPY_SILENT_DCL_CLEAR
150 #define REALLY_SLOW_IO
154 #define DPRINT(format, args...) \
155 pr_info("floppy%d: " format, current_drive, ##args)
157 #define DCL_DEBUG /* debug disk change line */
159 #define debug_dcl(test, fmt, args...) \
160 do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0)
162 #define debug_dcl(test, fmt, args...) \
163 do { if (0) DPRINT(fmt, ##args); } while (0)
166 /* do print messages for unexpected interrupts */
167 static int print_unex = 1;
168 #include <linux/module.h>
169 #include <linux/sched.h>
170 #include <linux/fs.h>
171 #include <linux/kernel.h>
172 #include <linux/timer.h>
173 #include <linux/workqueue.h>
174 #include <linux/fdreg.h>
175 #include <linux/fd.h>
176 #include <linux/hdreg.h>
177 #include <linux/errno.h>
178 #include <linux/slab.h>
179 #include <linux/mm.h>
180 #include <linux/bio.h>
181 #include <linux/string.h>
182 #include <linux/jiffies.h>
183 #include <linux/fcntl.h>
184 #include <linux/delay.h>
185 #include <linux/mc146818rtc.h> /* CMOS defines */
186 #include <linux/ioport.h>
187 #include <linux/interrupt.h>
188 #include <linux/init.h>
189 #include <linux/platform_device.h>
190 #include <linux/mod_devicetable.h>
191 #include <linux/mutex.h>
192 #include <linux/io.h>
193 #include <linux/uaccess.h>
194 #include <linux/async.h>
195 #include <linux/compat.h>
198 * PS/2 floppies have much slower step rates than regular floppies.
199 * It's been recommended that take about 1/4 of the default speed
200 * in some more extreme cases.
202 static DEFINE_MUTEX(floppy_mutex);
203 static int slow_floppy;
208 static int FLOPPY_IRQ = 6;
209 static int FLOPPY_DMA = 2;
210 static int can_use_virtual_dma = 2;
212 * can use virtual DMA:
213 * 0 = use of virtual DMA disallowed by config
214 * 1 = use of virtual DMA prescribed by config
215 * 2 = no virtual DMA preference configured. By default try hard DMA,
216 * but fall back on virtual DMA when not enough memory available
219 static int use_virtual_dma;
223 * 1 using virtual DMA
224 * This variable is set to virtual when a DMA mem problem arises, and
225 * reset back in floppy_grab_irq_and_dma.
226 * It is not safe to reset it in other circumstances, because the floppy
227 * driver may have several buffers in use at once, and we do currently not
228 * record each buffers capabilities
231 static DEFINE_SPINLOCK(floppy_lock);
233 static unsigned short virtual_dma_port = 0x3f0;
234 irqreturn_t floppy_interrupt(int irq, void *dev_id);
235 static int set_dor(int fdc, char mask, char data);
237 #define K_64 0x10000 /* 64KB */
239 /* the following is the mask of allowed drives. By default units 2 and
240 * 3 of both floppy controllers are disabled, because switching on the
241 * motor of these drives causes system hangs on some PCI computers. drive
242 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
243 * a drive is allowed.
245 * NOTE: This must come before we include the arch floppy header because
246 * some ports reference this variable from there. -DaveM
249 static int allowed_drive_mask = 0x33;
251 #include <asm/floppy.h>
253 static int irqdma_allocated;
255 #include <linux/blk-mq.h>
256 #include <linux/blkpg.h>
257 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
258 #include <linux/completion.h>
260 static LIST_HEAD(floppy_reqs);
261 static struct request *current_req;
262 static int set_next_request(void);
264 #ifndef fd_get_dma_residue
265 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
268 /* Dma Memory related stuff */
270 #ifndef fd_dma_mem_free
271 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
274 #ifndef fd_dma_mem_alloc
275 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size))
278 #ifndef fd_cacheflush
279 #define fd_cacheflush(addr, size) /* nothing... */
282 static inline void fallback_on_nodma_alloc(char **addr, size_t l)
284 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
286 return; /* we have the memory */
287 if (can_use_virtual_dma != 2)
288 return; /* no fallback allowed */
289 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n");
290 *addr = (char *)nodma_mem_alloc(l);
296 /* End dma memory related stuff */
298 static unsigned long fake_change;
299 static bool initialized;
301 #define ITYPE(x) (((x) >> 2) & 0x1f)
302 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
303 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
304 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
305 /* reverse mapping from unit and fdc to drive */
306 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
308 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
309 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
311 /* read/write commands */
318 #define SECT_PER_TRACK 6
323 /* format commands */
325 #define F_SECT_PER_TRACK 3
331 * Maximum disk size (in kilobytes).
332 * This default is used whenever the current disk size is unknown.
333 * [Now it is rather a minimum]
335 #define MAX_DISK_SIZE 4 /* 3984 */
338 * globals used by 'result()'
340 static unsigned char reply_buffer[FD_RAW_REPLY_SIZE];
341 static int inr; /* size of reply buffer, when called from interrupt */
345 #define ST3 0 /* result of GETSTATUS */
351 #define SEL_DLY (2 * HZ / 100)
354 * this struct defines the different floppy drive types.
357 struct floppy_drive_params params;
358 const char *name; /* name printed while booting */
359 } default_drive_params[] = {
360 /* NOTE: the time values in jiffies should be in msec!
362 | Maximum data rate supported by drive type
363 | | Head load time, msec
364 | | | Head unload time, msec (not used)
365 | | | | Step rate interval, usec
366 | | | | | Time needed for spinup time (jiffies)
367 | | | | | | Timeout for spinning down (jiffies)
368 | | | | | | | Spindown offset (where disk stops)
369 | | | | | | | | Select delay
370 | | | | | | | | | RPS
371 | | | | | | | | | | Max number of tracks
372 | | | | | | | | | | | Interrupt timeout
373 | | | | | | | | | | | | Max nonintlv. sectors
374 | | | | | | | | | | | | | -Max Errors- flags */
375 {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0,
376 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" },
378 {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0,
379 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
381 {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0,
382 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
384 {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
385 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/
387 {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
388 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/
390 {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
391 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
393 {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
394 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/
395 /* | --autodetected formats--- | | |
396 * read_track | | Name printed when booting
398 * Frequency of disk change checks */
401 static struct floppy_drive_params drive_params[N_DRIVE];
402 static struct floppy_drive_struct drive_state[N_DRIVE];
403 static struct floppy_write_errors write_errors[N_DRIVE];
404 static struct timer_list motor_off_timer[N_DRIVE];
405 static struct gendisk *disks[N_DRIVE];
406 static struct blk_mq_tag_set tag_sets[N_DRIVE];
407 static struct block_device *opened_bdev[N_DRIVE];
408 static DEFINE_MUTEX(open_lock);
409 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
412 * This struct defines the different floppy types.
414 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
415 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
416 * tells if the disk is in Commodore 1581 format, which means side 0 sectors
417 * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
418 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
419 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
420 * side 0 is on physical side 0 (but with the misnamed sector IDs).
421 * 'stretch' should probably be renamed to something more general, like
424 * Bits 2 through 9 of 'stretch' tell the number of the first sector.
425 * The LSB (bit 2) is flipped. For most disks, the first sector
426 * is 1 (represented by 0x00<<2). For some CP/M and music sampler
427 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
428 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
430 * Other parameters should be self-explanatory (see also setfdprm(8)).
439 | | | | | | Data rate, | 0x40 for perp
440 | | | | | | | Spec1 (stepping rate, head unload
441 | | | | | | | | /fmt gap (gap2) */
442 static struct floppy_struct floppy_type[32] = {
443 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */
444 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
445 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
446 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
447 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
448 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
449 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
450 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
451 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
452 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
454 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
455 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
456 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
457 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
458 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
459 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
460 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
461 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
462 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
463 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
465 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
466 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
467 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
468 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
469 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
470 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
471 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
472 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
473 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
474 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
476 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
477 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
480 #define SECTSIZE (_FD_SECTSIZE(*floppy))
482 /* Auto-detection: Disk type used until the next media change occurs. */
483 static struct floppy_struct *current_type[N_DRIVE];
486 * User-provided type information. current_type points to
487 * the respective entry of this array.
489 static struct floppy_struct user_params[N_DRIVE];
491 static sector_t floppy_sizes[256];
493 static char floppy_device_name[] = "floppy";
496 * The driver is trying to determine the correct media format
497 * while probing is set. rw_interrupt() clears it after a
502 /* Synchronization of FDC access. */
503 #define FD_COMMAND_NONE -1
504 #define FD_COMMAND_ERROR 2
505 #define FD_COMMAND_OKAY 3
507 static volatile int command_status = FD_COMMAND_NONE;
508 static unsigned long fdc_busy;
509 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
510 static DECLARE_WAIT_QUEUE_HEAD(command_done);
512 /* errors encountered on the current (or last) request */
513 static int floppy_errors;
515 /* Format request descriptor. */
516 static struct format_descr format_req;
519 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
520 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
521 * H is head unload time (1=16ms, 2=32ms, etc)
526 * Because these are written to by the DMA controller, they must
527 * not contain a 64k byte boundary crossing, or data will be
530 static char *floppy_track_buffer;
531 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 (floppy_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 = ++floppy_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()) {
2134 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1))
2135 #define CT(x) ((x) | 0xc0)
2137 static void setup_format_params(int track)
2145 unsigned char track, head, sect, size;
2146 } *here = (struct fparm *)floppy_track_buffer;
2148 raw_cmd = &default_raw_cmd;
2149 raw_cmd->track = track;
2151 raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
2152 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK);
2153 raw_cmd->rate = _floppy->rate & 0x43;
2154 raw_cmd->cmd_count = NR_F;
2155 raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_FORMAT);
2156 raw_cmd->cmd[DR_SELECT] = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head);
2157 raw_cmd->cmd[F_SIZECODE] = FD_SIZECODE(_floppy);
2158 raw_cmd->cmd[F_SECT_PER_TRACK] = _floppy->sect << 2 >> raw_cmd->cmd[F_SIZECODE];
2159 raw_cmd->cmd[F_GAP] = _floppy->fmt_gap;
2160 raw_cmd->cmd[F_FILL] = FD_FILL_BYTE;
2162 raw_cmd->kernel_data = floppy_track_buffer;
2163 raw_cmd->length = 4 * raw_cmd->cmd[F_SECT_PER_TRACK];
2165 if (!raw_cmd->cmd[F_SECT_PER_TRACK])
2168 /* allow for about 30ms for data transport per track */
2169 head_shift = (raw_cmd->cmd[F_SECT_PER_TRACK] + 5) / 6;
2171 /* a ``cylinder'' is two tracks plus a little stepping time */
2172 track_shift = 2 * head_shift + 3;
2174 /* position of logical sector 1 on this track */
2175 n = (track_shift * format_req.track + head_shift * format_req.head)
2176 % raw_cmd->cmd[F_SECT_PER_TRACK];
2178 /* determine interleave */
2180 if (_floppy->fmt_gap < 0x22)
2183 /* initialize field */
2184 for (count = 0; count < raw_cmd->cmd[F_SECT_PER_TRACK]; ++count) {
2185 here[count].track = format_req.track;
2186 here[count].head = format_req.head;
2187 here[count].sect = 0;
2188 here[count].size = raw_cmd->cmd[F_SIZECODE];
2190 /* place logical sectors */
2191 for (count = 1; count <= raw_cmd->cmd[F_SECT_PER_TRACK]; ++count) {
2192 here[n].sect = count;
2193 n = (n + il) % raw_cmd->cmd[F_SECT_PER_TRACK];
2194 if (here[n].sect) { /* sector busy, find next free sector */
2196 if (n >= raw_cmd->cmd[F_SECT_PER_TRACK]) {
2197 n -= raw_cmd->cmd[F_SECT_PER_TRACK];
2198 while (here[n].sect)
2203 if (_floppy->stretch & FD_SECTBASEMASK) {
2204 for (count = 0; count < raw_cmd->cmd[F_SECT_PER_TRACK]; count++)
2205 here[count].sect += FD_SECTBASE(_floppy) - 1;
2209 static void redo_format(void)
2212 setup_format_params(format_req.track << STRETCH(_floppy));
2214 debugt(__func__, "queue format request");
2217 static const struct cont_t format_cont = {
2218 .interrupt = format_interrupt,
2219 .redo = redo_format,
2220 .error = bad_flp_intr,
2221 .done = generic_done
2224 static int do_format(int drive, struct format_descr *tmp_format_req)
2228 if (lock_fdc(drive))
2233 _floppy->track > drive_params[current_drive].tracks ||
2234 tmp_format_req->track >= _floppy->track ||
2235 tmp_format_req->head >= _floppy->head ||
2236 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
2237 !_floppy->fmt_gap) {
2238 process_fd_request();
2241 format_req = *tmp_format_req;
2242 cont = &format_cont;
2244 ret = wait_til_done(redo_format, true);
2247 process_fd_request();
2252 * Buffer read/write and support
2253 * =============================
2256 static void floppy_end_request(struct request *req, blk_status_t error)
2258 unsigned int nr_sectors = current_count_sectors;
2259 unsigned int drive = (unsigned long)req->rq_disk->private_data;
2261 /* current_count_sectors can be zero if transfer failed */
2263 nr_sectors = blk_rq_cur_sectors(req);
2264 if (blk_update_request(req, error, nr_sectors << 9))
2266 __blk_mq_end_request(req, error);
2268 /* We're done with the request */
2273 /* new request_done. Can handle physical sectors which are smaller than a
2275 static void request_done(int uptodate)
2277 struct request *req = current_req;
2279 char msg[sizeof("request done ") + sizeof(int) * 3];
2282 snprintf(msg, sizeof(msg), "request done %d", uptodate);
2283 reschedule_timeout(MAXTIMEOUT, msg);
2286 pr_info("floppy.c: no request in request_done\n");
2291 /* maintain values for invalidation on geometry
2293 block = current_count_sectors + blk_rq_pos(req);
2294 INFBOUND(drive_state[current_drive].maxblock, block);
2295 if (block > _floppy->sect)
2296 drive_state[current_drive].maxtrack = 1;
2298 floppy_end_request(req, 0);
2300 if (rq_data_dir(req) == WRITE) {
2301 /* record write error information */
2302 write_errors[current_drive].write_errors++;
2303 if (write_errors[current_drive].write_errors == 1) {
2304 write_errors[current_drive].first_error_sector = blk_rq_pos(req);
2305 write_errors[current_drive].first_error_generation = drive_state[current_drive].generation;
2307 write_errors[current_drive].last_error_sector = blk_rq_pos(req);
2308 write_errors[current_drive].last_error_generation = drive_state[current_drive].generation;
2310 floppy_end_request(req, BLK_STS_IOERR);
2314 /* Interrupt handler evaluating the result of the r/w operation */
2315 static void rw_interrupt(void)
2322 if (reply_buffer[R_HEAD] >= 2) {
2323 /* some Toshiba floppy controllers occasionnally seem to
2324 * return bogus interrupts after read/write operations, which
2325 * can be recognized by a bad head number (>= 2) */
2329 if (!drive_state[current_drive].first_read_date)
2330 drive_state[current_drive].first_read_date = jiffies;
2333 ssize = DIV_ROUND_UP(1 << raw_cmd->cmd[SIZECODE], 4);
2335 if (reply_buffer[ST1] & ST1_EOC)
2340 if (raw_cmd->cmd[COMMAND] & 0x80)
2345 nr_sectors = (((reply_buffer[R_TRACK] - raw_cmd->cmd[TRACK]) * heads +
2346 reply_buffer[R_HEAD] - raw_cmd->cmd[HEAD]) * raw_cmd->cmd[SECT_PER_TRACK] +
2347 reply_buffer[R_SECTOR] - raw_cmd->cmd[SECTOR] + eoc) << raw_cmd->cmd[SIZECODE] >> 2;
2349 if (nr_sectors / ssize >
2350 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) {
2351 DPRINT("long rw: %x instead of %lx\n",
2352 nr_sectors, current_count_sectors);
2353 pr_info("rs=%d s=%d\n", reply_buffer[R_SECTOR],
2354 raw_cmd->cmd[SECTOR]);
2355 pr_info("rh=%d h=%d\n", reply_buffer[R_HEAD],
2356 raw_cmd->cmd[HEAD]);
2357 pr_info("rt=%d t=%d\n", reply_buffer[R_TRACK],
2358 raw_cmd->cmd[TRACK]);
2359 pr_info("heads=%d eoc=%d\n", heads, eoc);
2360 pr_info("spt=%d st=%d ss=%d\n",
2361 raw_cmd->cmd[SECT_PER_TRACK], fsector_t, ssize);
2362 pr_info("in_sector_offset=%d\n", in_sector_offset);
2365 nr_sectors -= in_sector_offset;
2366 INFBOUND(nr_sectors, 0);
2367 SUPBOUND(current_count_sectors, nr_sectors);
2369 switch (interpret_errors()) {
2374 if (!current_count_sectors) {
2381 if (!current_count_sectors) {
2385 current_type[current_drive] = _floppy;
2386 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2391 if (drive_params[current_drive].flags & FTD_MSG)
2392 DPRINT("Auto-detected floppy type %s in fd%d\n",
2393 _floppy->name, current_drive);
2394 current_type[current_drive] = _floppy;
2395 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2399 if (CT(raw_cmd->cmd[COMMAND]) != FD_READ ||
2400 raw_cmd->kernel_data == bio_data(current_req->bio)) {
2401 /* transfer directly from buffer */
2403 } else if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) {
2404 buffer_track = raw_cmd->track;
2405 buffer_drive = current_drive;
2406 INFBOUND(buffer_max, nr_sectors + fsector_t);
2411 /* Compute maximal contiguous buffer size. */
2412 static int buffer_chain_size(void)
2416 struct req_iterator iter;
2419 base = bio_data(current_req->bio);
2422 rq_for_each_segment(bv, current_req, iter) {
2423 if (page_address(bv.bv_page) + bv.bv_offset != base + size)
2432 /* Compute the maximal transfer size */
2433 static int transfer_size(int ssize, int max_sector, int max_size)
2435 SUPBOUND(max_sector, fsector_t + max_size);
2438 max_sector -= (max_sector % _floppy->sect) % ssize;
2440 /* transfer size, beginning not aligned */
2441 current_count_sectors = max_sector - fsector_t;
2447 * Move data from/to the track buffer to/from the buffer cache.
2449 static void copy_buffer(int ssize, int max_sector, int max_sector_2)
2451 int remaining; /* number of transferred 512-byte sectors */
2456 struct req_iterator iter;
2458 max_sector = transfer_size(ssize,
2459 min(max_sector, max_sector_2),
2460 blk_rq_sectors(current_req));
2462 if (current_count_sectors <= 0 && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE &&
2463 buffer_max > fsector_t + blk_rq_sectors(current_req))
2464 current_count_sectors = min_t(int, buffer_max - fsector_t,
2465 blk_rq_sectors(current_req));
2467 remaining = current_count_sectors << 9;
2468 if (remaining > blk_rq_bytes(current_req) && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) {
2469 DPRINT("in copy buffer\n");
2470 pr_info("current_count_sectors=%ld\n", current_count_sectors);
2471 pr_info("remaining=%d\n", remaining >> 9);
2472 pr_info("current_req->nr_sectors=%u\n",
2473 blk_rq_sectors(current_req));
2474 pr_info("current_req->current_nr_sectors=%u\n",
2475 blk_rq_cur_sectors(current_req));
2476 pr_info("max_sector=%d\n", max_sector);
2477 pr_info("ssize=%d\n", ssize);
2480 buffer_max = max(max_sector, buffer_max);
2482 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
2484 size = blk_rq_cur_bytes(current_req);
2486 rq_for_each_segment(bv, current_req, iter) {
2491 SUPBOUND(size, remaining);
2493 buffer = page_address(bv.bv_page) + bv.bv_offset;
2494 if (dma_buffer + size >
2495 floppy_track_buffer + (max_buffer_sectors << 10) ||
2496 dma_buffer < floppy_track_buffer) {
2497 DPRINT("buffer overrun in copy buffer %d\n",
2498 (int)((floppy_track_buffer - dma_buffer) >> 9));
2499 pr_info("fsector_t=%d buffer_min=%d\n",
2500 fsector_t, buffer_min);
2501 pr_info("current_count_sectors=%ld\n",
2502 current_count_sectors);
2503 if (CT(raw_cmd->cmd[COMMAND]) == FD_READ)
2505 if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE)
2509 if (((unsigned long)buffer) % 512)
2510 DPRINT("%p buffer not aligned\n", buffer);
2512 if (CT(raw_cmd->cmd[COMMAND]) == FD_READ)
2513 memcpy(buffer, dma_buffer, size);
2515 memcpy(dma_buffer, buffer, size);
2522 max_sector -= remaining >> 9;
2523 DPRINT("weirdness: remaining %d\n", remaining >> 9);
2527 /* work around a bug in pseudo DMA
2528 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2529 * sending data. Hence we need a different way to signal the
2530 * transfer length: We use raw_cmd->cmd[SECT_PER_TRACK]. Unfortunately, this
2531 * does not work with MT, hence we can only transfer one head at
2534 static void virtualdmabug_workaround(void)
2539 if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) {
2540 raw_cmd->cmd[COMMAND] &= ~0x80; /* switch off multiple track mode */
2542 hard_sectors = raw_cmd->length >> (7 + raw_cmd->cmd[SIZECODE]);
2543 end_sector = raw_cmd->cmd[SECTOR] + hard_sectors - 1;
2544 if (end_sector > raw_cmd->cmd[SECT_PER_TRACK]) {
2545 pr_info("too many sectors %d > %d\n",
2546 end_sector, raw_cmd->cmd[SECT_PER_TRACK]);
2549 raw_cmd->cmd[SECT_PER_TRACK] = end_sector;
2550 /* make sure raw_cmd->cmd[SECT_PER_TRACK]
2551 * points to end of transfer */
2556 * Formulate a read/write request.
2557 * this routine decides where to load the data (directly to buffer, or to
2558 * tmp floppy area), how much data to load (the size of the buffer, the whole
2559 * track, or a single sector)
2560 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2561 * allocation on the fly, it should be done here. No other part should need
2565 static int make_raw_rw_request(void)
2567 int aligned_sector_t;
2573 if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n"))
2576 set_fdc((long)current_req->rq_disk->private_data);
2578 raw_cmd = &default_raw_cmd;
2579 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK;
2580 raw_cmd->cmd_count = NR_RW;
2581 if (rq_data_dir(current_req) == READ) {
2582 raw_cmd->flags |= FD_RAW_READ;
2583 raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_READ);
2584 } else if (rq_data_dir(current_req) == WRITE) {
2585 raw_cmd->flags |= FD_RAW_WRITE;
2586 raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_WRITE);
2588 DPRINT("%s: unknown command\n", __func__);
2592 max_sector = _floppy->sect * _floppy->head;
2594 raw_cmd->cmd[TRACK] = (int)blk_rq_pos(current_req) / max_sector;
2595 fsector_t = (int)blk_rq_pos(current_req) % max_sector;
2596 if (_floppy->track && raw_cmd->cmd[TRACK] >= _floppy->track) {
2597 if (blk_rq_cur_sectors(current_req) & 1) {
2598 current_count_sectors = 1;
2603 raw_cmd->cmd[HEAD] = fsector_t / _floppy->sect;
2605 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) ||
2606 test_bit(FD_NEED_TWADDLE_BIT, &drive_state[current_drive].flags)) &&
2607 fsector_t < _floppy->sect)
2608 max_sector = _floppy->sect;
2610 /* 2M disks have phantom sectors on the first track */
2611 if ((_floppy->rate & FD_2M) && (!raw_cmd->cmd[TRACK]) && (!raw_cmd->cmd[HEAD])) {
2612 max_sector = 2 * _floppy->sect / 3;
2613 if (fsector_t >= max_sector) {
2614 current_count_sectors =
2615 min_t(int, _floppy->sect - fsector_t,
2616 blk_rq_sectors(current_req));
2619 raw_cmd->cmd[SIZECODE] = 2;
2621 raw_cmd->cmd[SIZECODE] = FD_SIZECODE(_floppy);
2622 raw_cmd->rate = _floppy->rate & 0x43;
2623 if ((_floppy->rate & FD_2M) &&
2624 (raw_cmd->cmd[TRACK] || raw_cmd->cmd[HEAD]) && raw_cmd->rate == 2)
2627 if (raw_cmd->cmd[SIZECODE])
2628 raw_cmd->cmd[SIZECODE2] = 0xff;
2630 raw_cmd->cmd[SIZECODE2] = 0x80;
2631 raw_cmd->track = raw_cmd->cmd[TRACK] << STRETCH(_floppy);
2632 raw_cmd->cmd[DR_SELECT] = UNIT(current_drive) + PH_HEAD(_floppy, raw_cmd->cmd[HEAD]);
2633 raw_cmd->cmd[GAP] = _floppy->gap;
2634 ssize = DIV_ROUND_UP(1 << raw_cmd->cmd[SIZECODE], 4);
2635 raw_cmd->cmd[SECT_PER_TRACK] = _floppy->sect << 2 >> raw_cmd->cmd[SIZECODE];
2636 raw_cmd->cmd[SECTOR] = ((fsector_t % _floppy->sect) << 2 >> raw_cmd->cmd[SIZECODE]) +
2637 FD_SECTBASE(_floppy);
2639 /* tracksize describes the size which can be filled up with sectors
2642 tracksize = _floppy->sect - _floppy->sect % ssize;
2643 if (tracksize < _floppy->sect) {
2644 raw_cmd->cmd[SECT_PER_TRACK]++;
2645 if (tracksize <= fsector_t % _floppy->sect)
2646 raw_cmd->cmd[SECTOR]--;
2648 /* if we are beyond tracksize, fill up using smaller sectors */
2649 while (tracksize <= fsector_t % _floppy->sect) {
2650 while (tracksize + ssize > _floppy->sect) {
2651 raw_cmd->cmd[SIZECODE]--;
2654 raw_cmd->cmd[SECTOR]++;
2655 raw_cmd->cmd[SECT_PER_TRACK]++;
2658 max_sector = raw_cmd->cmd[HEAD] * _floppy->sect + tracksize;
2659 } else if (!raw_cmd->cmd[TRACK] && !raw_cmd->cmd[HEAD] && !(_floppy->rate & FD_2M) && probing) {
2660 max_sector = _floppy->sect;
2661 } else if (!raw_cmd->cmd[HEAD] && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) {
2662 /* for virtual DMA bug workaround */
2663 max_sector = _floppy->sect;
2666 in_sector_offset = (fsector_t % _floppy->sect) % ssize;
2667 aligned_sector_t = fsector_t - in_sector_offset;
2668 max_size = blk_rq_sectors(current_req);
2669 if ((raw_cmd->track == buffer_track) &&
2670 (current_drive == buffer_drive) &&
2671 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
2672 /* data already in track buffer */
2673 if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) {
2674 copy_buffer(1, max_sector, buffer_max);
2677 } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) {
2678 if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) {
2679 unsigned int sectors;
2681 sectors = fsector_t + blk_rq_sectors(current_req);
2682 if (sectors > ssize && sectors < ssize + ssize)
2683 max_size = ssize + ssize;
2687 raw_cmd->flags &= ~FD_RAW_WRITE;
2688 raw_cmd->flags |= FD_RAW_READ;
2689 raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_READ);
2690 } else if ((unsigned long)bio_data(current_req->bio) < MAX_DMA_ADDRESS) {
2691 unsigned long dma_limit;
2692 int direct, indirect;
2695 transfer_size(ssize, max_sector,
2696 max_buffer_sectors * 2) - fsector_t;
2699 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2700 * on a 64 bit machine!
2702 max_size = buffer_chain_size();
2703 dma_limit = (MAX_DMA_ADDRESS -
2704 ((unsigned long)bio_data(current_req->bio))) >> 9;
2705 if ((unsigned long)max_size > dma_limit)
2706 max_size = dma_limit;
2707 /* 64 kb boundaries */
2708 if (CROSS_64KB(bio_data(current_req->bio), max_size << 9))
2710 ((unsigned long)bio_data(current_req->bio)) %
2712 direct = transfer_size(ssize, max_sector, max_size) - fsector_t;
2714 * We try to read tracks, but if we get too many errors, we
2715 * go back to reading just one sector at a time.
2717 * This means we should be able to read a sector even if there
2718 * are other bad sectors on this track.
2721 (indirect * 2 > direct * 3 &&
2722 floppy_errors < drive_params[current_drive].max_errors.read_track &&
2724 (drive_params[current_drive].read_track & (1 << drive_state[current_drive].probed_format)))))) {
2725 max_size = blk_rq_sectors(current_req);
2727 raw_cmd->kernel_data = bio_data(current_req->bio);
2728 raw_cmd->length = current_count_sectors << 9;
2729 if (raw_cmd->length == 0) {
2730 DPRINT("%s: zero dma transfer attempted\n", __func__);
2731 DPRINT("indirect=%d direct=%d fsector_t=%d\n",
2732 indirect, direct, fsector_t);
2735 virtualdmabug_workaround();
2740 if (CT(raw_cmd->cmd[COMMAND]) == FD_READ)
2741 max_size = max_sector; /* unbounded */
2743 /* claim buffer track if needed */
2744 if (buffer_track != raw_cmd->track || /* bad track */
2745 buffer_drive != current_drive || /* bad drive */
2746 fsector_t > buffer_max ||
2747 fsector_t < buffer_min ||
2748 ((CT(raw_cmd->cmd[COMMAND]) == FD_READ ||
2749 (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) &&
2750 max_sector > 2 * max_buffer_sectors + buffer_min &&
2751 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) {
2752 /* not enough space */
2754 buffer_drive = current_drive;
2755 buffer_max = buffer_min = aligned_sector_t;
2757 raw_cmd->kernel_data = floppy_track_buffer +
2758 ((aligned_sector_t - buffer_min) << 9);
2760 if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) {
2761 /* copy write buffer to track buffer.
2762 * if we get here, we know that the write
2763 * is either aligned or the data already in the buffer
2764 * (buffer will be overwritten) */
2765 if (in_sector_offset && buffer_track == -1)
2766 DPRINT("internal error offset !=0 on write\n");
2767 buffer_track = raw_cmd->track;
2768 buffer_drive = current_drive;
2769 copy_buffer(ssize, max_sector,
2770 2 * max_buffer_sectors + buffer_min);
2772 transfer_size(ssize, max_sector,
2773 2 * max_buffer_sectors + buffer_min -
2776 /* round up current_count_sectors to get dma xfer size */
2777 raw_cmd->length = in_sector_offset + current_count_sectors;
2778 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1;
2779 raw_cmd->length <<= 9;
2780 if ((raw_cmd->length < current_count_sectors << 9) ||
2781 (raw_cmd->kernel_data != bio_data(current_req->bio) &&
2782 CT(raw_cmd->cmd[COMMAND]) == FD_WRITE &&
2783 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
2784 aligned_sector_t < buffer_min)) ||
2785 raw_cmd->length % (128 << raw_cmd->cmd[SIZECODE]) ||
2786 raw_cmd->length <= 0 || current_count_sectors <= 0) {
2787 DPRINT("fractionary current count b=%lx s=%lx\n",
2788 raw_cmd->length, current_count_sectors);
2789 if (raw_cmd->kernel_data != bio_data(current_req->bio))
2790 pr_info("addr=%d, length=%ld\n",
2791 (int)((raw_cmd->kernel_data -
2792 floppy_track_buffer) >> 9),
2793 current_count_sectors);
2794 pr_info("st=%d ast=%d mse=%d msi=%d\n",
2795 fsector_t, aligned_sector_t, max_sector, max_size);
2796 pr_info("ssize=%x SIZECODE=%d\n", ssize, raw_cmd->cmd[SIZECODE]);
2797 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2798 raw_cmd->cmd[COMMAND], raw_cmd->cmd[SECTOR],
2799 raw_cmd->cmd[HEAD], raw_cmd->cmd[TRACK]);
2800 pr_info("buffer drive=%d\n", buffer_drive);
2801 pr_info("buffer track=%d\n", buffer_track);
2802 pr_info("buffer_min=%d\n", buffer_min);
2803 pr_info("buffer_max=%d\n", buffer_max);
2807 if (raw_cmd->kernel_data != bio_data(current_req->bio)) {
2808 if (raw_cmd->kernel_data < floppy_track_buffer ||
2809 current_count_sectors < 0 ||
2810 raw_cmd->length < 0 ||
2811 raw_cmd->kernel_data + raw_cmd->length >
2812 floppy_track_buffer + (max_buffer_sectors << 10)) {
2813 DPRINT("buffer overrun in schedule dma\n");
2814 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n",
2815 fsector_t, buffer_min, raw_cmd->length >> 9);
2816 pr_info("current_count_sectors=%ld\n",
2817 current_count_sectors);
2818 if (CT(raw_cmd->cmd[COMMAND]) == FD_READ)
2820 if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE)
2824 } else if (raw_cmd->length > blk_rq_bytes(current_req) ||
2825 current_count_sectors > blk_rq_sectors(current_req)) {
2826 DPRINT("buffer overrun in direct transfer\n");
2828 } else if (raw_cmd->length < current_count_sectors << 9) {
2829 DPRINT("more sectors than bytes\n");
2830 pr_info("bytes=%ld\n", raw_cmd->length >> 9);
2831 pr_info("sectors=%ld\n", current_count_sectors);
2833 if (raw_cmd->length == 0) {
2834 DPRINT("zero dma transfer attempted from make_raw_request\n");
2838 virtualdmabug_workaround();
2842 static int set_next_request(void)
2844 current_req = list_first_entry_or_null(&floppy_reqs, struct request,
2848 list_del_init(¤t_req->queuelist);
2854 /* Starts or continues processing request. Will automatically unlock the
2855 * driver at end of request.
2857 static void redo_fd_request(void)
2863 if (current_drive < N_DRIVE)
2864 floppy_off(current_drive);
2870 spin_lock_irq(&floppy_lock);
2871 pending = set_next_request();
2872 spin_unlock_irq(&floppy_lock);
2879 drive = (long)current_req->rq_disk->private_data;
2881 reschedule_timeout(current_drive, "redo fd request");
2884 raw_cmd = &default_raw_cmd;
2886 if (start_motor(redo_fd_request))
2889 disk_change(current_drive);
2890 if (test_bit(current_drive, &fake_change) ||
2891 test_bit(FD_DISK_CHANGED_BIT, &drive_state[current_drive].flags)) {
2892 DPRINT("disk absent or changed during operation\n");
2896 if (!_floppy) { /* Autodetection */
2898 drive_state[current_drive].probed_format = 0;
2899 if (next_valid_format(current_drive)) {
2900 DPRINT("no autodetectable formats\n");
2907 _floppy = floppy_type + drive_params[current_drive].autodetect[drive_state[current_drive].probed_format];
2910 tmp = make_raw_rw_request();
2916 if (test_bit(FD_NEED_TWADDLE_BIT, &drive_state[current_drive].flags))
2917 twaddle(current_fdc, current_drive);
2918 schedule_bh(floppy_start);
2919 debugt(__func__, "queue fd request");
2923 static const struct cont_t rw_cont = {
2924 .interrupt = rw_interrupt,
2925 .redo = redo_fd_request,
2926 .error = bad_flp_intr,
2927 .done = request_done
2930 /* schedule the request and automatically unlock the driver on completion */
2931 static void process_fd_request(void)
2934 schedule_bh(redo_fd_request);
2937 static blk_status_t floppy_queue_rq(struct blk_mq_hw_ctx *hctx,
2938 const struct blk_mq_queue_data *bd)
2940 blk_mq_start_request(bd->rq);
2942 if (WARN(max_buffer_sectors == 0,
2943 "VFS: %s called on non-open device\n", __func__))
2944 return BLK_STS_IOERR;
2946 if (WARN(atomic_read(&usage_count) == 0,
2947 "warning: usage count=0, current_req=%p sect=%ld flags=%llx\n",
2948 current_req, (long)blk_rq_pos(current_req),
2949 (unsigned long long) current_req->cmd_flags))
2950 return BLK_STS_IOERR;
2952 if (test_and_set_bit(0, &fdc_busy)) {
2953 /* fdc busy, this new request will be treated when the
2954 current one is done */
2955 is_alive(__func__, "old request running");
2956 return BLK_STS_RESOURCE;
2959 spin_lock_irq(&floppy_lock);
2960 list_add_tail(&bd->rq->queuelist, &floppy_reqs);
2961 spin_unlock_irq(&floppy_lock);
2963 command_status = FD_COMMAND_NONE;
2964 __reschedule_timeout(MAXTIMEOUT, "fd_request");
2966 process_fd_request();
2967 is_alive(__func__, "");
2971 static const struct cont_t poll_cont = {
2972 .interrupt = success_and_wakeup,
2973 .redo = floppy_ready,
2974 .error = generic_failure,
2975 .done = generic_done
2978 static int poll_drive(bool interruptible, int flag)
2980 /* no auto-sense, just clear dcl */
2981 raw_cmd = &default_raw_cmd;
2982 raw_cmd->flags = flag;
2984 raw_cmd->cmd_count = 0;
2986 debug_dcl(drive_params[current_drive].flags,
2987 "setting NEWCHANGE in poll_drive\n");
2988 set_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[current_drive].flags);
2990 return wait_til_done(floppy_ready, interruptible);
2994 * User triggered reset
2995 * ====================
2998 static void reset_intr(void)
3000 pr_info("weird, reset interrupt called\n");
3003 static const struct cont_t reset_cont = {
3004 .interrupt = reset_intr,
3005 .redo = success_and_wakeup,
3006 .error = generic_failure,
3007 .done = generic_done
3011 * Resets the FDC connected to drive <drive>.
3012 * Both current_drive and current_fdc are changed to match the new drive.
3014 static int user_reset_fdc(int drive, int arg, bool interruptible)
3018 if (lock_fdc(drive))
3021 if (arg == FD_RESET_ALWAYS)
3022 fdc_state[current_fdc].reset = 1;
3023 if (fdc_state[current_fdc].reset) {
3024 /* note: reset_fdc will take care of unlocking the driver
3028 ret = wait_til_done(reset_fdc, interruptible);
3032 process_fd_request();
3037 * Misc Ioctl's and support
3038 * ========================
3040 static inline int fd_copyout(void __user *param, const void *address,
3043 return copy_to_user(param, address, size) ? -EFAULT : 0;
3046 static inline int fd_copyin(void __user *param, void *address,
3049 return copy_from_user(address, param, size) ? -EFAULT : 0;
3052 static const char *drive_name(int type, int drive)
3054 struct floppy_struct *floppy;
3057 floppy = floppy_type + type;
3059 if (drive_params[drive].native_format)
3060 floppy = floppy_type + drive_params[drive].native_format;
3065 return floppy->name;
3070 #ifdef CONFIG_BLK_DEV_FD_RAWCMD
3073 static void raw_cmd_done(int flag)
3078 raw_cmd->flags |= FD_RAW_FAILURE;
3079 raw_cmd->flags |= FD_RAW_HARDFAILURE;
3081 raw_cmd->reply_count = inr;
3082 if (raw_cmd->reply_count > FD_RAW_REPLY_SIZE)
3083 raw_cmd->reply_count = 0;
3084 for (i = 0; i < raw_cmd->reply_count; i++)
3085 raw_cmd->reply[i] = reply_buffer[i];
3087 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3088 unsigned long flags;
3089 flags = claim_dma_lock();
3090 raw_cmd->length = fd_get_dma_residue();
3091 release_dma_lock(flags);
3094 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
3095 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
3096 raw_cmd->flags |= FD_RAW_FAILURE;
3098 if (disk_change(current_drive))
3099 raw_cmd->flags |= FD_RAW_DISK_CHANGE;
3101 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
3102 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
3103 motor_off_callback(&motor_off_timer[current_drive]);
3105 if (raw_cmd->next &&
3106 (!(raw_cmd->flags & FD_RAW_FAILURE) ||
3107 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
3108 ((raw_cmd->flags & FD_RAW_FAILURE) ||
3109 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) {
3110 raw_cmd = raw_cmd->next;
3117 static const struct cont_t raw_cmd_cont = {
3118 .interrupt = success_and_wakeup,
3119 .redo = floppy_start,
3120 .error = generic_failure,
3121 .done = raw_cmd_done
3124 static int raw_cmd_copyout(int cmd, void __user *param,
3125 struct floppy_raw_cmd *ptr)
3130 struct floppy_raw_cmd cmd = *ptr;
3132 cmd.kernel_data = NULL;
3133 ret = copy_to_user(param, &cmd, sizeof(cmd));
3136 param += sizeof(struct floppy_raw_cmd);
3137 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) {
3138 if (ptr->length >= 0 &&
3139 ptr->length <= ptr->buffer_length) {
3140 long length = ptr->buffer_length - ptr->length;
3141 ret = fd_copyout(ptr->data, ptr->kernel_data,
3153 static void raw_cmd_free(struct floppy_raw_cmd **ptr)
3155 struct floppy_raw_cmd *next;
3156 struct floppy_raw_cmd *this;
3161 if (this->buffer_length) {
3162 fd_dma_mem_free((unsigned long)this->kernel_data,
3163 this->buffer_length);
3164 this->buffer_length = 0;
3172 #define MAX_LEN (1UL << MAX_ORDER << PAGE_SHIFT)
3174 static int raw_cmd_copyin(int cmd, void __user *param,
3175 struct floppy_raw_cmd **rcmd)
3177 struct floppy_raw_cmd *ptr;
3184 ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_KERNEL);
3188 ret = copy_from_user(ptr, param, sizeof(*ptr));
3190 ptr->buffer_length = 0;
3191 ptr->kernel_data = NULL;
3194 param += sizeof(struct floppy_raw_cmd);
3195 if (ptr->cmd_count > FD_RAW_CMD_FULLSIZE)
3198 for (i = 0; i < FD_RAW_REPLY_SIZE; i++)
3200 ptr->resultcode = 0;
3202 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3203 if (ptr->length <= 0 || ptr->length >= MAX_LEN)
3205 ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length);
3206 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
3207 if (!ptr->kernel_data)
3209 ptr->buffer_length = ptr->length;
3211 if (ptr->flags & FD_RAW_WRITE) {
3212 ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length);
3217 if (ptr->flags & FD_RAW_MORE) {
3218 rcmd = &(ptr->next);
3226 static int raw_cmd_ioctl(int cmd, void __user *param)
3228 struct floppy_raw_cmd *my_raw_cmd;
3233 if (fdc_state[current_fdc].rawcmd <= 1)
3234 fdc_state[current_fdc].rawcmd = 1;
3235 for (drive = 0; drive < N_DRIVE; drive++) {
3236 if (FDC(drive) != current_fdc)
3238 if (drive == current_drive) {
3239 if (drive_state[drive].fd_ref > 1) {
3240 fdc_state[current_fdc].rawcmd = 2;
3243 } else if (drive_state[drive].fd_ref) {
3244 fdc_state[current_fdc].rawcmd = 2;
3249 if (fdc_state[current_fdc].reset)
3252 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
3254 raw_cmd_free(&my_raw_cmd);
3258 raw_cmd = my_raw_cmd;
3259 cont = &raw_cmd_cont;
3260 ret = wait_til_done(floppy_start, true);
3261 debug_dcl(drive_params[current_drive].flags,
3262 "calling disk change from raw_cmd ioctl\n");
3264 if (ret != -EINTR && fdc_state[current_fdc].reset)
3267 drive_state[current_drive].track = NO_TRACK;
3269 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
3272 raw_cmd_free(&my_raw_cmd);
3276 static int floppy_raw_cmd_ioctl(int type, int drive, int cmd,
3281 pr_warn_once("Note: FDRAWCMD is deprecated and will be removed from the kernel in the near future.\n");
3285 if (lock_fdc(drive))
3288 ret = raw_cmd_ioctl(cmd, param);
3291 process_fd_request();
3295 #else /* CONFIG_BLK_DEV_FD_RAWCMD */
3297 static int floppy_raw_cmd_ioctl(int type, int drive, int cmd,
3305 static int invalidate_drive(struct block_device *bdev)
3307 /* invalidate the buffer track to force a reread */
3308 set_bit((long)bdev->bd_disk->private_data, &fake_change);
3309 process_fd_request();
3310 if (bdev_check_media_change(bdev))
3311 floppy_revalidate(bdev->bd_disk);
3315 static int set_geometry(unsigned int cmd, struct floppy_struct *g,
3316 int drive, int type, struct block_device *bdev)
3320 /* sanity checking for parameters. */
3321 if ((int)g->sect <= 0 ||
3322 (int)g->head <= 0 ||
3323 /* check for overflow in max_sector */
3324 (int)(g->sect * g->head) <= 0 ||
3325 /* check for zero in raw_cmd->cmd[F_SECT_PER_TRACK] */
3326 (unsigned char)((g->sect << 2) >> FD_SIZECODE(g)) == 0 ||
3327 g->track <= 0 || g->track > drive_params[drive].tracks >> STRETCH(g) ||
3328 /* check if reserved bits are set */
3329 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0)
3332 if (!capable(CAP_SYS_ADMIN))
3334 mutex_lock(&open_lock);
3335 if (lock_fdc(drive)) {
3336 mutex_unlock(&open_lock);
3339 floppy_type[type] = *g;
3340 floppy_type[type].name = "user format";
3341 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
3342 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] =
3343 floppy_type[type].size + 1;
3344 process_fd_request();
3345 for (cnt = 0; cnt < N_DRIVE; cnt++) {
3346 struct block_device *bdev = opened_bdev[cnt];
3347 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
3349 __invalidate_device(bdev, true);
3351 mutex_unlock(&open_lock);
3355 if (lock_fdc(drive))
3357 if (cmd != FDDEFPRM) {
3358 /* notice a disk change immediately, else
3359 * we lose our settings immediately*/
3360 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3363 oldStretch = g->stretch;
3364 user_params[drive] = *g;
3365 if (buffer_drive == drive)
3366 SUPBOUND(buffer_max, user_params[drive].sect);
3367 current_type[drive] = &user_params[drive];
3368 floppy_sizes[drive] = user_params[drive].size;
3369 if (cmd == FDDEFPRM)
3370 drive_state[current_drive].keep_data = -1;
3372 drive_state[current_drive].keep_data = 1;
3373 /* invalidation. Invalidate only when needed, i.e.
3374 * when there are already sectors in the buffer cache
3375 * whose number will change. This is useful, because
3376 * mtools often changes the geometry of the disk after
3377 * looking at the boot block */
3378 if (drive_state[current_drive].maxblock > user_params[drive].sect ||
3379 drive_state[current_drive].maxtrack ||
3380 ((user_params[drive].sect ^ oldStretch) &
3381 (FD_SWAPSIDES | FD_SECTBASEMASK)))
3382 invalidate_drive(bdev);
3384 process_fd_request();
3389 /* handle obsolete ioctl's */
3390 static unsigned int ioctl_table[] = {
3418 static int normalize_ioctl(unsigned int *cmd, int *size)
3422 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) {
3423 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) {
3424 *size = _IOC_SIZE(*cmd);
3425 *cmd = ioctl_table[i];
3426 if (*size > _IOC_SIZE(*cmd)) {
3427 pr_info("ioctl not yet supported\n");
3436 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
3439 *g = &floppy_type[type];
3441 if (lock_fdc(drive))
3443 if (poll_drive(false, 0) == -EINTR)
3445 process_fd_request();
3446 *g = current_type[drive];
3453 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
3455 int drive = (long)bdev->bd_disk->private_data;
3456 int type = ITYPE(drive_state[drive].fd_device);
3457 struct floppy_struct *g;
3460 ret = get_floppy_geometry(drive, type, &g);
3464 geo->heads = g->head;
3465 geo->sectors = g->sect;
3466 geo->cylinders = g->track;
3470 static bool valid_floppy_drive_params(const short autodetect[FD_AUTODETECT_SIZE],
3473 size_t floppy_type_size = ARRAY_SIZE(floppy_type);
3476 for (i = 0; i < FD_AUTODETECT_SIZE; ++i) {
3477 if (autodetect[i] < 0 ||
3478 autodetect[i] >= floppy_type_size)
3482 if (native_format < 0 || native_format >= floppy_type_size)
3488 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3489 unsigned long param)
3491 int drive = (long)bdev->bd_disk->private_data;
3492 int type = ITYPE(drive_state[drive].fd_device);
3496 struct floppy_struct g; /* geometry */
3497 struct format_descr f;
3498 struct floppy_max_errors max_errors;
3499 struct floppy_drive_params dp;
3500 } inparam; /* parameters coming from user space */
3501 const void *outparam; /* parameters passed back to user space */
3503 /* convert compatibility eject ioctls into floppy eject ioctl.
3504 * We do this in order to provide a means to eject floppy disks before
3505 * installing the new fdutils package */
3506 if (cmd == CDROMEJECT || /* CD-ROM eject */
3507 cmd == 0x6470) { /* SunOS floppy eject */
3508 DPRINT("obsolete eject ioctl\n");
3509 DPRINT("please use floppycontrol --eject\n");
3513 if (!((cmd & 0xff00) == 0x0200))
3516 /* convert the old style command into a new style command */
3517 ret = normalize_ioctl(&cmd, &size);
3521 /* permission checks */
3522 if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) ||
3523 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
3526 if (WARN_ON(size < 0 || size > sizeof(inparam)))
3530 memset(&inparam, 0, sizeof(inparam));
3531 if (_IOC_DIR(cmd) & _IOC_WRITE) {
3532 ret = fd_copyin((void __user *)param, &inparam, size);
3539 if (drive_state[drive].fd_ref != 1)
3540 /* somebody else has this drive open */
3542 if (lock_fdc(drive))
3545 /* do the actual eject. Fails on
3546 * non-Sparc architectures */
3547 ret = fd_eject(UNIT(drive));
3549 set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags);
3550 set_bit(FD_VERIFY_BIT, &drive_state[drive].flags);
3551 process_fd_request();
3554 if (lock_fdc(drive))
3556 current_type[drive] = NULL;
3557 floppy_sizes[drive] = MAX_DISK_SIZE << 1;
3558 drive_state[drive].keep_data = 0;
3559 return invalidate_drive(bdev);
3562 return set_geometry(cmd, &inparam.g, drive, type, bdev);
3564 ret = get_floppy_geometry(drive, type,
3565 (struct floppy_struct **)&outparam);
3568 memcpy(&inparam.g, outparam,
3569 offsetof(struct floppy_struct, name));
3570 outparam = &inparam.g;
3573 drive_params[drive].flags |= FTD_MSG;
3576 drive_params[drive].flags &= ~FTD_MSG;
3579 if (lock_fdc(drive))
3581 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3583 ret = drive_state[drive].flags;
3584 process_fd_request();
3585 if (ret & FD_VERIFY)
3587 if (!(ret & FD_DISK_WRITABLE))
3591 if (drive_state[drive].fd_ref != 1)
3593 return do_format(drive, &inparam.f);
3596 if (lock_fdc(drive))
3598 return invalidate_drive(bdev);
3599 case FDSETEMSGTRESH:
3600 drive_params[drive].max_errors.reporting = (unsigned short)(param & 0x0f);
3603 outparam = &drive_params[drive].max_errors;
3606 drive_params[drive].max_errors = inparam.max_errors;
3609 outparam = drive_name(type, drive);
3610 SUPBOUND(size, strlen((const char *)outparam) + 1);
3613 if (!valid_floppy_drive_params(inparam.dp.autodetect,
3614 inparam.dp.native_format))
3616 drive_params[drive] = inparam.dp;
3619 outparam = &drive_params[drive];
3622 if (lock_fdc(drive))
3624 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3626 process_fd_request();
3629 outparam = &drive_state[drive];
3632 return user_reset_fdc(drive, (int)param, true);
3634 outparam = &fdc_state[FDC(drive)];
3637 memset(&write_errors[drive], 0, sizeof(write_errors[drive]));
3640 outparam = &write_errors[drive];
3643 return floppy_raw_cmd_ioctl(type, drive, cmd, (void __user *)param);
3645 if (lock_fdc(drive))
3647 twaddle(current_fdc, current_drive);
3648 process_fd_request();
3654 if (_IOC_DIR(cmd) & _IOC_READ)
3655 return fd_copyout((void __user *)param, outparam, size);
3660 static int fd_ioctl(struct block_device *bdev, fmode_t mode,
3661 unsigned int cmd, unsigned long param)
3665 mutex_lock(&floppy_mutex);
3666 ret = fd_locked_ioctl(bdev, mode, cmd, param);
3667 mutex_unlock(&floppy_mutex);
3672 #ifdef CONFIG_COMPAT
3674 struct compat_floppy_drive_params {
3676 compat_ulong_t max_dtr;
3680 compat_ulong_t spinup;
3681 compat_ulong_t spindown;
3682 unsigned char spindown_offset;
3683 unsigned char select_delay;
3685 unsigned char tracks;
3686 compat_ulong_t timeout;
3687 unsigned char interleave_sect;
3688 struct floppy_max_errors max_errors;
3691 short autodetect[FD_AUTODETECT_SIZE];
3692 compat_int_t checkfreq;
3693 compat_int_t native_format;
3696 struct compat_floppy_drive_struct {
3698 compat_ulong_t spinup_date;
3699 compat_ulong_t select_date;
3700 compat_ulong_t first_read_date;
3701 short probed_format;
3705 compat_int_t generation;
3706 compat_int_t keep_data;
3707 compat_int_t fd_ref;
3708 compat_int_t fd_device;
3709 compat_int_t last_checked;
3710 compat_caddr_t dmabuf;
3711 compat_int_t bufblocks;
3714 struct compat_floppy_fdc_state {
3718 unsigned char version;
3720 compat_ulong_t address;
3721 unsigned int rawcmd:2;
3722 unsigned int reset:1;
3723 unsigned int need_configure:1;
3724 unsigned int perp_mode:2;
3725 unsigned int has_fifo:1;
3726 unsigned int driver_version;
3727 unsigned char track[4];
3730 struct compat_floppy_write_errors {
3731 unsigned int write_errors;
3732 compat_ulong_t first_error_sector;
3733 compat_int_t first_error_generation;
3734 compat_ulong_t last_error_sector;
3735 compat_int_t last_error_generation;
3736 compat_uint_t badness;
3739 #define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct)
3740 #define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct)
3741 #define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params)
3742 #define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params)
3743 #define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct)
3744 #define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct compat_floppy_drive_struct)
3745 #define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state)
3746 #define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors)
3748 static int compat_set_geometry(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3749 struct compat_floppy_struct __user *arg)
3751 struct floppy_struct v;
3755 BUILD_BUG_ON(offsetof(struct floppy_struct, name) !=
3756 offsetof(struct compat_floppy_struct, name));
3758 if (!(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL)))
3761 memset(&v, 0, sizeof(struct floppy_struct));
3762 if (copy_from_user(&v, arg, offsetof(struct floppy_struct, name)))
3765 mutex_lock(&floppy_mutex);
3766 drive = (long)bdev->bd_disk->private_data;
3767 type = ITYPE(drive_state[drive].fd_device);
3768 err = set_geometry(cmd == FDSETPRM32 ? FDSETPRM : FDDEFPRM,
3769 &v, drive, type, bdev);
3770 mutex_unlock(&floppy_mutex);
3774 static int compat_get_prm(int drive,
3775 struct compat_floppy_struct __user *arg)
3777 struct compat_floppy_struct v;
3778 struct floppy_struct *p;
3781 memset(&v, 0, sizeof(v));
3782 mutex_lock(&floppy_mutex);
3783 err = get_floppy_geometry(drive, ITYPE(drive_state[drive].fd_device),
3786 mutex_unlock(&floppy_mutex);
3789 memcpy(&v, p, offsetof(struct floppy_struct, name));
3790 mutex_unlock(&floppy_mutex);
3791 if (copy_to_user(arg, &v, sizeof(struct compat_floppy_struct)))
3796 static int compat_setdrvprm(int drive,
3797 struct compat_floppy_drive_params __user *arg)
3799 struct compat_floppy_drive_params v;
3801 if (!capable(CAP_SYS_ADMIN))
3803 if (copy_from_user(&v, arg, sizeof(struct compat_floppy_drive_params)))
3805 if (!valid_floppy_drive_params(v.autodetect, v.native_format))
3807 mutex_lock(&floppy_mutex);
3808 drive_params[drive].cmos = v.cmos;
3809 drive_params[drive].max_dtr = v.max_dtr;
3810 drive_params[drive].hlt = v.hlt;
3811 drive_params[drive].hut = v.hut;
3812 drive_params[drive].srt = v.srt;
3813 drive_params[drive].spinup = v.spinup;
3814 drive_params[drive].spindown = v.spindown;
3815 drive_params[drive].spindown_offset = v.spindown_offset;
3816 drive_params[drive].select_delay = v.select_delay;
3817 drive_params[drive].rps = v.rps;
3818 drive_params[drive].tracks = v.tracks;
3819 drive_params[drive].timeout = v.timeout;
3820 drive_params[drive].interleave_sect = v.interleave_sect;
3821 drive_params[drive].max_errors = v.max_errors;
3822 drive_params[drive].flags = v.flags;
3823 drive_params[drive].read_track = v.read_track;
3824 memcpy(drive_params[drive].autodetect, v.autodetect,
3825 sizeof(v.autodetect));
3826 drive_params[drive].checkfreq = v.checkfreq;
3827 drive_params[drive].native_format = v.native_format;
3828 mutex_unlock(&floppy_mutex);
3832 static int compat_getdrvprm(int drive,
3833 struct compat_floppy_drive_params __user *arg)
3835 struct compat_floppy_drive_params v;
3837 memset(&v, 0, sizeof(struct compat_floppy_drive_params));
3838 mutex_lock(&floppy_mutex);
3839 v.cmos = drive_params[drive].cmos;
3840 v.max_dtr = drive_params[drive].max_dtr;
3841 v.hlt = drive_params[drive].hlt;
3842 v.hut = drive_params[drive].hut;
3843 v.srt = drive_params[drive].srt;
3844 v.spinup = drive_params[drive].spinup;
3845 v.spindown = drive_params[drive].spindown;
3846 v.spindown_offset = drive_params[drive].spindown_offset;
3847 v.select_delay = drive_params[drive].select_delay;
3848 v.rps = drive_params[drive].rps;
3849 v.tracks = drive_params[drive].tracks;
3850 v.timeout = drive_params[drive].timeout;
3851 v.interleave_sect = drive_params[drive].interleave_sect;
3852 v.max_errors = drive_params[drive].max_errors;
3853 v.flags = drive_params[drive].flags;
3854 v.read_track = drive_params[drive].read_track;
3855 memcpy(v.autodetect, drive_params[drive].autodetect,
3856 sizeof(v.autodetect));
3857 v.checkfreq = drive_params[drive].checkfreq;
3858 v.native_format = drive_params[drive].native_format;
3859 mutex_unlock(&floppy_mutex);
3861 if (copy_to_user(arg, &v, sizeof(struct compat_floppy_drive_params)))
3866 static int compat_getdrvstat(int drive, bool poll,
3867 struct compat_floppy_drive_struct __user *arg)
3869 struct compat_floppy_drive_struct v;
3871 memset(&v, 0, sizeof(struct compat_floppy_drive_struct));
3872 mutex_lock(&floppy_mutex);
3875 if (lock_fdc(drive))
3877 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3879 process_fd_request();
3881 v.spinup_date = drive_state[drive].spinup_date;
3882 v.select_date = drive_state[drive].select_date;
3883 v.first_read_date = drive_state[drive].first_read_date;
3884 v.probed_format = drive_state[drive].probed_format;
3885 v.track = drive_state[drive].track;
3886 v.maxblock = drive_state[drive].maxblock;
3887 v.maxtrack = drive_state[drive].maxtrack;
3888 v.generation = drive_state[drive].generation;
3889 v.keep_data = drive_state[drive].keep_data;
3890 v.fd_ref = drive_state[drive].fd_ref;
3891 v.fd_device = drive_state[drive].fd_device;
3892 v.last_checked = drive_state[drive].last_checked;
3893 v.dmabuf = (uintptr_t) drive_state[drive].dmabuf;
3894 v.bufblocks = drive_state[drive].bufblocks;
3895 mutex_unlock(&floppy_mutex);
3897 if (copy_to_user(arg, &v, sizeof(struct compat_floppy_drive_struct)))
3901 mutex_unlock(&floppy_mutex);
3905 static int compat_getfdcstat(int drive,
3906 struct compat_floppy_fdc_state __user *arg)
3908 struct compat_floppy_fdc_state v32;
3909 struct floppy_fdc_state v;
3911 mutex_lock(&floppy_mutex);
3912 v = fdc_state[FDC(drive)];
3913 mutex_unlock(&floppy_mutex);
3915 memset(&v32, 0, sizeof(struct compat_floppy_fdc_state));
3916 v32.spec1 = v.spec1;
3917 v32.spec2 = v.spec2;
3919 v32.version = v.version;
3921 v32.address = v.address;
3922 v32.rawcmd = v.rawcmd;
3923 v32.reset = v.reset;
3924 v32.need_configure = v.need_configure;
3925 v32.perp_mode = v.perp_mode;
3926 v32.has_fifo = v.has_fifo;
3927 v32.driver_version = v.driver_version;
3928 memcpy(v32.track, v.track, 4);
3929 if (copy_to_user(arg, &v32, sizeof(struct compat_floppy_fdc_state)))
3934 static int compat_werrorget(int drive,
3935 struct compat_floppy_write_errors __user *arg)
3937 struct compat_floppy_write_errors v32;
3938 struct floppy_write_errors v;
3940 memset(&v32, 0, sizeof(struct compat_floppy_write_errors));
3941 mutex_lock(&floppy_mutex);
3942 v = write_errors[drive];
3943 mutex_unlock(&floppy_mutex);
3944 v32.write_errors = v.write_errors;
3945 v32.first_error_sector = v.first_error_sector;
3946 v32.first_error_generation = v.first_error_generation;
3947 v32.last_error_sector = v.last_error_sector;
3948 v32.last_error_generation = v.last_error_generation;
3949 v32.badness = v.badness;
3950 if (copy_to_user(arg, &v32, sizeof(struct compat_floppy_write_errors)))
3955 static int fd_compat_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3956 unsigned long param)
3958 int drive = (long)bdev->bd_disk->private_data;
3960 case CDROMEJECT: /* CD-ROM eject */
3961 case 0x6470: /* SunOS floppy eject */
3965 case FDSETEMSGTRESH:
3973 return fd_ioctl(bdev, mode, cmd, param);
3980 return fd_ioctl(bdev, mode, cmd,
3981 (unsigned long)compat_ptr(param));
3984 return compat_set_geometry(bdev, mode, cmd, compat_ptr(param));
3986 return compat_get_prm(drive, compat_ptr(param));
3988 return compat_setdrvprm(drive, compat_ptr(param));
3990 return compat_getdrvprm(drive, compat_ptr(param));
3991 case FDPOLLDRVSTAT32:
3992 return compat_getdrvstat(drive, true, compat_ptr(param));
3993 case FDGETDRVSTAT32:
3994 return compat_getdrvstat(drive, false, compat_ptr(param));
3995 case FDGETFDCSTAT32:
3996 return compat_getfdcstat(drive, compat_ptr(param));
3998 return compat_werrorget(drive, compat_ptr(param));
4004 static void __init config_types(void)
4006 bool has_drive = false;
4009 /* read drive info out of physical CMOS */
4011 if (!drive_params[drive].cmos)
4012 drive_params[drive].cmos = FLOPPY0_TYPE;
4014 if (!drive_params[drive].cmos)
4015 drive_params[drive].cmos = FLOPPY1_TYPE;
4017 /* FIXME: additional physical CMOS drive detection should go here */
4019 for (drive = 0; drive < N_DRIVE; drive++) {
4020 unsigned int type = drive_params[drive].cmos;
4021 struct floppy_drive_params *params;
4022 const char *name = NULL;
4025 if (type < ARRAY_SIZE(default_drive_params)) {
4026 params = &default_drive_params[type].params;
4028 name = default_drive_params[type].name;
4029 allowed_drive_mask |= 1 << drive;
4031 allowed_drive_mask &= ~(1 << drive);
4033 params = &default_drive_params[0].params;
4034 snprintf(temparea, sizeof(temparea),
4035 "unknown type %d (usb?)", type);
4039 const char *prepend;
4043 pr_info("Floppy drive(s):");
4048 pr_cont("%s fd%d is %s", prepend, drive, name);
4050 drive_params[drive] = *params;
4057 static void floppy_release(struct gendisk *disk, fmode_t mode)
4059 int drive = (long)disk->private_data;
4061 mutex_lock(&floppy_mutex);
4062 mutex_lock(&open_lock);
4063 if (!drive_state[drive].fd_ref--) {
4064 DPRINT("floppy_release with fd_ref == 0");
4065 drive_state[drive].fd_ref = 0;
4067 if (!drive_state[drive].fd_ref)
4068 opened_bdev[drive] = NULL;
4069 mutex_unlock(&open_lock);
4070 mutex_unlock(&floppy_mutex);
4074 * floppy_open check for aliasing (/dev/fd0 can be the same as
4075 * /dev/PS0 etc), and disallows simultaneous access to the same
4076 * drive with different device numbers.
4078 static int floppy_open(struct block_device *bdev, fmode_t mode)
4080 int drive = (long)bdev->bd_disk->private_data;
4081 int old_dev, new_dev;
4086 mutex_lock(&floppy_mutex);
4087 mutex_lock(&open_lock);
4088 old_dev = drive_state[drive].fd_device;
4089 if (opened_bdev[drive] && opened_bdev[drive] != bdev)
4092 if (!drive_state[drive].fd_ref && (drive_params[drive].flags & FD_BROKEN_DCL)) {
4093 set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags);
4094 set_bit(FD_VERIFY_BIT, &drive_state[drive].flags);
4097 drive_state[drive].fd_ref++;
4099 opened_bdev[drive] = bdev;
4103 if (!floppy_track_buffer) {
4104 /* if opening an ED drive, reserve a big buffer,
4105 * else reserve a small one */
4106 if ((drive_params[drive].cmos == 6) || (drive_params[drive].cmos == 5))
4107 try = 64; /* Only 48 actually useful */
4109 try = 32; /* Only 24 actually useful */
4111 tmp = (char *)fd_dma_mem_alloc(1024 * try);
4112 if (!tmp && !floppy_track_buffer) {
4113 try >>= 1; /* buffer only one side */
4115 tmp = (char *)fd_dma_mem_alloc(1024 * try);
4117 if (!tmp && !floppy_track_buffer)
4118 fallback_on_nodma_alloc(&tmp, 2048 * try);
4119 if (!tmp && !floppy_track_buffer) {
4120 DPRINT("Unable to allocate DMA memory\n");
4123 if (floppy_track_buffer) {
4125 fd_dma_mem_free((unsigned long)tmp, try * 1024);
4127 buffer_min = buffer_max = -1;
4128 floppy_track_buffer = tmp;
4129 max_buffer_sectors = try;
4133 new_dev = MINOR(bdev->bd_dev);
4134 drive_state[drive].fd_device = new_dev;
4135 set_capacity(disks[drive], floppy_sizes[new_dev]);
4136 if (old_dev != -1 && old_dev != new_dev) {
4137 if (buffer_drive == drive)
4141 if (fdc_state[FDC(drive)].rawcmd == 1)
4142 fdc_state[FDC(drive)].rawcmd = 2;
4144 if (!(mode & FMODE_NDELAY)) {
4145 if (mode & (FMODE_READ|FMODE_WRITE)) {
4146 drive_state[drive].last_checked = 0;
4147 clear_bit(FD_OPEN_SHOULD_FAIL_BIT,
4148 &drive_state[drive].flags);
4149 if (bdev_check_media_change(bdev))
4150 floppy_revalidate(bdev->bd_disk);
4151 if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags))
4153 if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags))
4157 if ((mode & FMODE_WRITE) &&
4158 !test_bit(FD_DISK_WRITABLE_BIT, &drive_state[drive].flags))
4161 mutex_unlock(&open_lock);
4162 mutex_unlock(&floppy_mutex);
4165 drive_state[drive].fd_ref--;
4167 if (!drive_state[drive].fd_ref)
4168 opened_bdev[drive] = NULL;
4170 mutex_unlock(&open_lock);
4171 mutex_unlock(&floppy_mutex);
4176 * Check if the disk has been changed or if a change has been faked.
4178 static unsigned int floppy_check_events(struct gendisk *disk,
4179 unsigned int clearing)
4181 int drive = (long)disk->private_data;
4183 if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) ||
4184 test_bit(FD_VERIFY_BIT, &drive_state[drive].flags))
4185 return DISK_EVENT_MEDIA_CHANGE;
4187 if (time_after(jiffies, drive_state[drive].last_checked + drive_params[drive].checkfreq)) {
4188 if (lock_fdc(drive))
4190 poll_drive(false, 0);
4191 process_fd_request();
4194 if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) ||
4195 test_bit(FD_VERIFY_BIT, &drive_state[drive].flags) ||
4196 test_bit(drive, &fake_change) ||
4197 drive_no_geom(drive))
4198 return DISK_EVENT_MEDIA_CHANGE;
4203 * This implements "read block 0" for floppy_revalidate().
4204 * Needed for format autodetection, checking whether there is
4205 * a disk in the drive, and whether that disk is writable.
4210 struct completion complete;
4213 static void floppy_rb0_cb(struct bio *bio)
4215 struct rb0_cbdata *cbdata = (struct rb0_cbdata *)bio->bi_private;
4216 int drive = cbdata->drive;
4218 if (bio->bi_status) {
4219 pr_info("floppy: error %d while reading block 0\n",
4221 set_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags);
4223 complete(&cbdata->complete);
4226 static int __floppy_read_block_0(struct block_device *bdev, int drive)
4229 struct bio_vec bio_vec;
4231 struct rb0_cbdata cbdata;
4233 page = alloc_page(GFP_NOIO);
4235 process_fd_request();
4239 cbdata.drive = drive;
4241 bio_init(&bio, &bio_vec, 1);
4242 bio_set_dev(&bio, bdev);
4243 bio_add_page(&bio, page, block_size(bdev), 0);
4245 bio.bi_iter.bi_sector = 0;
4246 bio.bi_flags |= (1 << BIO_QUIET);
4247 bio.bi_private = &cbdata;
4248 bio.bi_end_io = floppy_rb0_cb;
4249 bio_set_op_attrs(&bio, REQ_OP_READ, 0);
4251 init_completion(&cbdata.complete);
4254 process_fd_request();
4256 wait_for_completion(&cbdata.complete);
4263 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
4264 * the bootblock (block 0). "Autodetection" is also needed to check whether
4265 * there is a disk in the drive at all... Thus we also do it for fixed
4266 * geometry formats */
4267 static int floppy_revalidate(struct gendisk *disk)
4269 int drive = (long)disk->private_data;
4273 if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) ||
4274 test_bit(FD_VERIFY_BIT, &drive_state[drive].flags) ||
4275 test_bit(drive, &fake_change) ||
4276 drive_no_geom(drive)) {
4277 if (WARN(atomic_read(&usage_count) == 0,
4278 "VFS: revalidate called on non-open device.\n"))
4281 res = lock_fdc(drive);
4284 cf = (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) ||
4285 test_bit(FD_VERIFY_BIT, &drive_state[drive].flags));
4286 if (!(cf || test_bit(drive, &fake_change) || drive_no_geom(drive))) {
4287 process_fd_request(); /*already done by another thread */
4290 drive_state[drive].maxblock = 0;
4291 drive_state[drive].maxtrack = 0;
4292 if (buffer_drive == drive)
4294 clear_bit(drive, &fake_change);
4295 clear_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags);
4297 drive_state[drive].generation++;
4298 if (drive_no_geom(drive)) {
4300 res = __floppy_read_block_0(opened_bdev[drive], drive);
4303 poll_drive(false, FD_RAW_NEED_DISK);
4304 process_fd_request();
4307 set_capacity(disk, floppy_sizes[drive_state[drive].fd_device]);
4311 static const struct block_device_operations floppy_fops = {
4312 .owner = THIS_MODULE,
4313 .open = floppy_open,
4314 .release = floppy_release,
4316 .getgeo = fd_getgeo,
4317 .check_events = floppy_check_events,
4318 #ifdef CONFIG_COMPAT
4319 .compat_ioctl = fd_compat_ioctl,
4324 * Floppy Driver initialization
4325 * =============================
4328 /* Determine the floppy disk controller type */
4329 /* This routine was written by David C. Niemi */
4330 static char __init get_fdc_version(int fdc)
4334 output_byte(fdc, FD_DUMPREGS); /* 82072 and better know DUMPREGS */
4335 if (fdc_state[fdc].reset)
4339 return FDC_NONE; /* No FDC present ??? */
4340 if ((r == 1) && (reply_buffer[0] == 0x80)) {
4341 pr_info("FDC %d is an 8272A\n", fdc);
4342 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
4345 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
4350 if (!fdc_configure(fdc)) {
4351 pr_info("FDC %d is an 82072\n", fdc);
4352 return FDC_82072; /* 82072 doesn't know CONFIGURE */
4355 output_byte(fdc, FD_PERPENDICULAR);
4356 if (need_more_output(fdc) == MORE_OUTPUT) {
4357 output_byte(fdc, 0);
4359 pr_info("FDC %d is an 82072A\n", fdc);
4360 return FDC_82072A; /* 82072A as found on Sparcs. */
4363 output_byte(fdc, FD_UNLOCK);
4365 if ((r == 1) && (reply_buffer[0] == 0x80)) {
4366 pr_info("FDC %d is a pre-1991 82077\n", fdc);
4367 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
4370 if ((r != 1) || (reply_buffer[0] != 0x00)) {
4371 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
4375 output_byte(fdc, FD_PARTID);
4378 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
4382 if (reply_buffer[0] == 0x80) {
4383 pr_info("FDC %d is a post-1991 82077\n", fdc);
4384 return FDC_82077; /* Revised 82077AA passes all the tests */
4386 switch (reply_buffer[0] >> 5) {
4388 /* Either a 82078-1 or a 82078SL running at 5Volt */
4389 pr_info("FDC %d is an 82078.\n", fdc);
4392 pr_info("FDC %d is a 44pin 82078\n", fdc);
4395 pr_info("FDC %d is a S82078B\n", fdc);
4398 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc);
4401 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n",
4402 fdc, reply_buffer[0] >> 5);
4403 return FDC_82078_UNKN;
4405 } /* get_fdc_version */
4407 /* lilo configuration */
4409 static void __init floppy_set_flags(int *ints, int param, int param2)
4413 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4415 default_drive_params[i].params.flags |= param2;
4417 default_drive_params[i].params.flags &= ~param2;
4419 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param);
4422 static void __init daring(int *ints, int param, int param2)
4426 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4428 default_drive_params[i].params.select_delay = 0;
4429 default_drive_params[i].params.flags |=
4430 FD_SILENT_DCL_CLEAR;
4432 default_drive_params[i].params.select_delay =
4434 default_drive_params[i].params.flags &=
4435 ~FD_SILENT_DCL_CLEAR;
4438 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken");
4441 static void __init set_cmos(int *ints, int dummy, int dummy2)
4443 int current_drive = 0;
4446 DPRINT("wrong number of parameters for CMOS\n");
4449 current_drive = ints[1];
4450 if (current_drive < 0 || current_drive >= 8) {
4451 DPRINT("bad drive for set_cmos\n");
4455 if (current_drive >= 4 && !FDC2)
4458 drive_params[current_drive].cmos = ints[2];
4459 DPRINT("setting CMOS code to %d\n", ints[2]);
4462 static struct param_table {
4464 void (*fn) (int *ints, int param, int param2);
4468 } config_params[] __initdata = {
4469 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4470 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4471 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0},
4472 {"irq", NULL, &FLOPPY_IRQ, 6, 0},
4473 {"dma", NULL, &FLOPPY_DMA, 2, 0},
4474 {"daring", daring, NULL, 1, 0},
4476 {"two_fdc", NULL, &FDC2, 0x370, 0},
4477 {"one_fdc", NULL, &FDC2, 0, 0},
4479 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL},
4480 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL},
4481 {"messages", floppy_set_flags, NULL, 1, FTD_MSG},
4482 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR},
4483 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG},
4484 {"nodma", NULL, &can_use_virtual_dma, 1, 0},
4485 {"omnibook", NULL, &can_use_virtual_dma, 1, 0},
4486 {"yesdma", NULL, &can_use_virtual_dma, 0, 0},
4487 {"fifo_depth", NULL, &fifo_depth, 0xa, 0},
4488 {"nofifo", NULL, &no_fifo, 0x20, 0},
4489 {"usefifo", NULL, &no_fifo, 0, 0},
4490 {"cmos", set_cmos, NULL, 0, 0},
4491 {"slow", NULL, &slow_floppy, 1, 0},
4492 {"unexpected_interrupts", NULL, &print_unex, 1, 0},
4493 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0},
4494 {"L40SX", NULL, &print_unex, 0, 0}
4499 static int __init floppy_setup(char *str)
4505 str = get_options(str, ARRAY_SIZE(ints), ints);
4507 for (i = 0; i < ARRAY_SIZE(config_params); i++) {
4508 if (strcmp(str, config_params[i].name) == 0) {
4512 param = config_params[i].def_param;
4513 if (config_params[i].fn)
4514 config_params[i].fn(ints, param,
4517 if (config_params[i].var) {
4518 DPRINT("%s=%d\n", str, param);
4519 *config_params[i].var = param;
4526 DPRINT("unknown floppy option [%s]\n", str);
4528 DPRINT("allowed options are:");
4529 for (i = 0; i < ARRAY_SIZE(config_params); i++)
4530 pr_cont(" %s", config_params[i].name);
4533 DPRINT("botched floppy option\n");
4534 DPRINT("Read Documentation/admin-guide/blockdev/floppy.rst\n");
4538 static int have_no_fdc = -ENODEV;
4540 static ssize_t floppy_cmos_show(struct device *dev,
4541 struct device_attribute *attr, char *buf)
4543 struct platform_device *p = to_platform_device(dev);
4547 return sprintf(buf, "%X\n", drive_params[drive].cmos);
4550 static DEVICE_ATTR(cmos, 0444, floppy_cmos_show, NULL);
4552 static struct attribute *floppy_dev_attrs[] = {
4553 &dev_attr_cmos.attr,
4557 ATTRIBUTE_GROUPS(floppy_dev);
4559 static void floppy_device_release(struct device *dev)
4563 static int floppy_resume(struct device *dev)
4568 saved_drive = current_drive;
4569 for (fdc = 0; fdc < N_FDC; fdc++)
4570 if (fdc_state[fdc].address != -1)
4571 user_reset_fdc(REVDRIVE(fdc, 0), FD_RESET_ALWAYS, false);
4572 set_fdc(saved_drive);
4576 static const struct dev_pm_ops floppy_pm_ops = {
4577 .resume = floppy_resume,
4578 .restore = floppy_resume,
4581 static struct platform_driver floppy_driver = {
4584 .pm = &floppy_pm_ops,
4588 static const struct blk_mq_ops floppy_mq_ops = {
4589 .queue_rq = floppy_queue_rq,
4592 static struct platform_device floppy_device[N_DRIVE];
4594 static bool floppy_available(int drive)
4596 if (!(allowed_drive_mask & (1 << drive)))
4598 if (fdc_state[FDC(drive)].version == FDC_NONE)
4603 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
4605 int drive = (*part & 3) | ((*part & 0x80) >> 5);
4606 if (drive >= N_DRIVE || !floppy_available(drive))
4608 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type))
4611 return get_disk_and_module(disks[drive]);
4614 static int __init do_floppy_init(void)
4616 int i, unit, drive, err;
4619 interruptjiffies = resultjiffies = jiffies;
4621 #if defined(CONFIG_PPC)
4622 if (check_legacy_ioport(FDC1))
4628 floppy_wq = alloc_ordered_workqueue("floppy", 0);
4632 for (drive = 0; drive < N_DRIVE; drive++) {
4633 disks[drive] = alloc_disk(1);
4634 if (!disks[drive]) {
4639 disks[drive]->queue = blk_mq_init_sq_queue(&tag_sets[drive],
4641 BLK_MQ_F_SHOULD_MERGE);
4642 if (IS_ERR(disks[drive]->queue)) {
4643 err = PTR_ERR(disks[drive]->queue);
4644 disks[drive]->queue = NULL;
4648 blk_queue_bounce_limit(disks[drive]->queue, BLK_BOUNCE_HIGH);
4649 blk_queue_max_hw_sectors(disks[drive]->queue, 64);
4650 disks[drive]->major = FLOPPY_MAJOR;
4651 disks[drive]->first_minor = TOMINOR(drive);
4652 disks[drive]->fops = &floppy_fops;
4653 disks[drive]->events = DISK_EVENT_MEDIA_CHANGE;
4654 sprintf(disks[drive]->disk_name, "fd%d", drive);
4656 timer_setup(&motor_off_timer[drive], motor_off_callback, 0);
4659 err = register_blkdev(FLOPPY_MAJOR, "fd");
4663 err = platform_driver_register(&floppy_driver);
4665 goto out_unreg_blkdev;
4667 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
4668 floppy_find, NULL, NULL);
4670 for (i = 0; i < 256; i++)
4672 floppy_sizes[i] = floppy_type[ITYPE(i)].size;
4674 floppy_sizes[i] = MAX_DISK_SIZE << 1;
4676 reschedule_timeout(MAXTIMEOUT, "floppy init");
4679 for (i = 0; i < N_FDC; i++) {
4680 memset(&fdc_state[i], 0, sizeof(*fdc_state));
4681 fdc_state[i].dtr = -1;
4682 fdc_state[i].dor = 0x4;
4683 #if defined(__sparc__) || defined(__mc68000__)
4684 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4688 fdc_state[i].version = FDC_82072A;
4692 use_virtual_dma = can_use_virtual_dma & 1;
4693 fdc_state[0].address = FDC1;
4694 if (fdc_state[0].address == -1) {
4695 cancel_delayed_work(&fd_timeout);
4697 goto out_unreg_region;
4700 fdc_state[1].address = FDC2;
4703 current_fdc = 0; /* reset fdc in case of unexpected interrupt */
4704 err = floppy_grab_irq_and_dma();
4706 cancel_delayed_work(&fd_timeout);
4708 goto out_unreg_region;
4711 /* initialise drive state */
4712 for (drive = 0; drive < N_DRIVE; drive++) {
4713 memset(&drive_state[drive], 0, sizeof(drive_state[drive]));
4714 memset(&write_errors[drive], 0, sizeof(write_errors[drive]));
4715 set_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[drive].flags);
4716 set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags);
4717 set_bit(FD_VERIFY_BIT, &drive_state[drive].flags);
4718 drive_state[drive].fd_device = -1;
4719 floppy_track_buffer = NULL;
4720 max_buffer_sectors = 0;
4723 * Small 10 msec delay to let through any interrupt that
4724 * initialization might have triggered, to not
4725 * confuse detection:
4729 for (i = 0; i < N_FDC; i++) {
4730 fdc_state[i].driver_version = FD_DRIVER_VERSION;
4731 for (unit = 0; unit < 4; unit++)
4732 fdc_state[i].track[unit] = 0;
4733 if (fdc_state[i].address == -1)
4735 fdc_state[i].rawcmd = 2;
4736 if (user_reset_fdc(REVDRIVE(i, 0), FD_RESET_ALWAYS, false)) {
4737 /* free ioports reserved by floppy_grab_irq_and_dma() */
4738 floppy_release_regions(i);
4739 fdc_state[i].address = -1;
4740 fdc_state[i].version = FDC_NONE;
4743 /* Try to determine the floppy controller type */
4744 fdc_state[i].version = get_fdc_version(i);
4745 if (fdc_state[i].version == FDC_NONE) {
4746 /* free ioports reserved by floppy_grab_irq_and_dma() */
4747 floppy_release_regions(i);
4748 fdc_state[i].address = -1;
4751 if (can_use_virtual_dma == 2 &&
4752 fdc_state[i].version < FDC_82072A)
4753 can_use_virtual_dma = 0;
4756 /* Not all FDCs seem to be able to handle the version command
4757 * properly, so force a reset for the standard FDC clones,
4758 * to avoid interrupt garbage.
4760 user_reset_fdc(REVDRIVE(i, 0), FD_RESET_ALWAYS, false);
4763 cancel_delayed_work(&fd_timeout);
4767 DPRINT("no floppy controllers found\n");
4769 goto out_release_dma;
4772 for (drive = 0; drive < N_DRIVE; drive++) {
4773 if (!floppy_available(drive))
4776 floppy_device[drive].name = floppy_device_name;
4777 floppy_device[drive].id = drive;
4778 floppy_device[drive].dev.release = floppy_device_release;
4779 floppy_device[drive].dev.groups = floppy_dev_groups;
4781 err = platform_device_register(&floppy_device[drive]);
4783 goto out_remove_drives;
4785 /* to be cleaned up... */
4786 disks[drive]->private_data = (void *)(long)drive;
4787 disks[drive]->flags |= GENHD_FL_REMOVABLE;
4788 device_add_disk(&floppy_device[drive].dev, disks[drive], NULL);
4795 if (floppy_available(drive)) {
4796 del_gendisk(disks[drive]);
4797 platform_device_unregister(&floppy_device[drive]);
4801 if (atomic_read(&usage_count))
4802 floppy_release_irq_and_dma();
4804 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4805 platform_driver_unregister(&floppy_driver);
4807 unregister_blkdev(FLOPPY_MAJOR, "fd");
4809 destroy_workqueue(floppy_wq);
4810 for (drive = 0; drive < N_DRIVE; drive++) {
4813 if (disks[drive]->queue) {
4814 del_timer_sync(&motor_off_timer[drive]);
4815 blk_cleanup_queue(disks[drive]->queue);
4816 disks[drive]->queue = NULL;
4817 blk_mq_free_tag_set(&tag_sets[drive]);
4819 put_disk(disks[drive]);
4825 static __init void floppy_async_init(void *data, async_cookie_t cookie)
4831 static int __init floppy_init(void)
4834 return do_floppy_init();
4836 /* Don't hold up the bootup by the floppy initialization */
4837 async_schedule(floppy_async_init, NULL);
4842 static const struct io_region {
4847 /* address + 3 is sometimes reserved by pnp bios for motherboard */
4849 /* address + 6 is reserved, and may be taken by IDE.
4850 * Unfortunately, Adaptec doesn't know this :-(, */
4854 static void floppy_release_allocated_regions(int fdc, const struct io_region *p)
4856 while (p != io_regions) {
4858 release_region(fdc_state[fdc].address + p->offset, p->size);
4862 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
4864 static int floppy_request_regions(int fdc)
4866 const struct io_region *p;
4868 for (p = io_regions; p < ARRAY_END(io_regions); p++) {
4869 if (!request_region(fdc_state[fdc].address + p->offset,
4870 p->size, "floppy")) {
4871 DPRINT("Floppy io-port 0x%04lx in use\n",
4872 fdc_state[fdc].address + p->offset);
4873 floppy_release_allocated_regions(fdc, p);
4880 static void floppy_release_regions(int fdc)
4882 floppy_release_allocated_regions(fdc, ARRAY_END(io_regions));
4885 static int floppy_grab_irq_and_dma(void)
4889 if (atomic_inc_return(&usage_count) > 1)
4893 * We might have scheduled a free_irq(), wait it to
4896 flush_workqueue(floppy_wq);
4898 if (fd_request_irq()) {
4899 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4901 atomic_dec(&usage_count);
4904 if (fd_request_dma()) {
4905 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4907 if (can_use_virtual_dma & 2)
4908 use_virtual_dma = can_use_virtual_dma = 1;
4909 if (!(can_use_virtual_dma & 1)) {
4911 atomic_dec(&usage_count);
4916 for (fdc = 0; fdc < N_FDC; fdc++) {
4917 if (fdc_state[fdc].address != -1) {
4918 if (floppy_request_regions(fdc))
4922 for (fdc = 0; fdc < N_FDC; fdc++) {
4923 if (fdc_state[fdc].address != -1) {
4924 reset_fdc_info(fdc, 1);
4925 fdc_outb(fdc_state[fdc].dor, fdc, FD_DOR);
4929 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4931 for (fdc = 0; fdc < N_FDC; fdc++)
4932 if (fdc_state[fdc].address != -1)
4933 fdc_outb(fdc_state[fdc].dor, fdc, FD_DOR);
4935 * The driver will try and free resources and relies on us
4936 * to know if they were allocated or not.
4939 irqdma_allocated = 1;
4945 floppy_release_regions(fdc);
4947 atomic_dec(&usage_count);
4951 static void floppy_release_irq_and_dma(void)
4958 unsigned long tmpaddr;
4960 if (!atomic_dec_and_test(&usage_count))
4963 if (irqdma_allocated) {
4967 irqdma_allocated = 0;
4974 if (floppy_track_buffer && max_buffer_sectors) {
4975 tmpsize = max_buffer_sectors * 1024;
4976 tmpaddr = (unsigned long)floppy_track_buffer;
4977 floppy_track_buffer = NULL;
4978 max_buffer_sectors = 0;
4979 buffer_min = buffer_max = -1;
4980 fd_dma_mem_free(tmpaddr, tmpsize);
4983 for (drive = 0; drive < N_FDC * 4; drive++)
4984 if (timer_pending(motor_off_timer + drive))
4985 pr_info("motor off timer %d still active\n", drive);
4988 if (delayed_work_pending(&fd_timeout))
4989 pr_info("floppy timer still active:%s\n", timeout_message);
4990 if (delayed_work_pending(&fd_timer))
4991 pr_info("auxiliary floppy timer still active\n");
4992 if (work_pending(&floppy_work))
4993 pr_info("work still pending\n");
4994 for (fdc = 0; fdc < N_FDC; fdc++)
4995 if (fdc_state[fdc].address != -1)
4996 floppy_release_regions(fdc);
5001 static char *floppy;
5003 static void __init parse_floppy_cfg_string(char *cfg)
5009 while (*cfg && *cfg != ' ' && *cfg != '\t')
5020 static int __init floppy_module_init(void)
5023 parse_floppy_cfg_string(floppy);
5024 return floppy_init();
5026 module_init(floppy_module_init);
5028 static void __exit floppy_module_exit(void)
5032 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
5033 unregister_blkdev(FLOPPY_MAJOR, "fd");
5034 platform_driver_unregister(&floppy_driver);
5036 destroy_workqueue(floppy_wq);
5038 for (drive = 0; drive < N_DRIVE; drive++) {
5039 del_timer_sync(&motor_off_timer[drive]);
5041 if (floppy_available(drive)) {
5042 del_gendisk(disks[drive]);
5043 platform_device_unregister(&floppy_device[drive]);
5045 blk_cleanup_queue(disks[drive]->queue);
5046 blk_mq_free_tag_set(&tag_sets[drive]);
5049 * These disks have not called add_disk(). Don't put down
5050 * queue reference in put_disk().
5052 if (!(allowed_drive_mask & (1 << drive)) ||
5053 fdc_state[FDC(drive)].version == FDC_NONE)
5054 disks[drive]->queue = NULL;
5056 put_disk(disks[drive]);
5059 cancel_delayed_work_sync(&fd_timeout);
5060 cancel_delayed_work_sync(&fd_timer);
5062 if (atomic_read(&usage_count))
5063 floppy_release_irq_and_dma();
5065 /* eject disk, if any */
5069 module_exit(floppy_module_exit);
5071 module_param(floppy, charp, 0);
5072 module_param(FLOPPY_IRQ, int, 0);
5073 module_param(FLOPPY_DMA, int, 0);
5074 MODULE_AUTHOR("Alain L. Knaff");
5075 MODULE_SUPPORTED_DEVICE("fd");
5076 MODULE_LICENSE("GPL");
5078 /* This doesn't actually get used other than for module information */
5079 static const struct pnp_device_id floppy_pnpids[] = {
5084 MODULE_DEVICE_TABLE(pnp, floppy_pnpids);
5088 __setup("floppy=", floppy_setup);
5089 module_init(floppy_init)
5092 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);