2 * linux/drivers/block/floppy.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 * Copyright (C) 1993, 1994 Alain Knaff
6 * Copyright (C) 1998 Alan Cox
10 * 02.12.91 - Changed to static variables to indicate need for reset
11 * and recalibrate. This makes some things easier (output_byte reset
12 * checking etc), and means less interrupt jumping in case of errors,
13 * so the code is hopefully easier to understand.
17 * This file is certainly a mess. I've tried my best to get it working,
18 * but I don't like programming floppies, and I have only one anyway.
19 * Urgel. I should check for more errors, and do more graceful error
20 * recovery. Seems there are problems with several drives. I've tried to
21 * correct them. No promises.
25 * As with hd.c, all routines within this file can (and will) be called
26 * by interrupts, so extreme caution is needed. A hardware interrupt
27 * handler may not sleep, or a kernel panic will happen. Thus I cannot
28 * call "floppy-on" directly, but have to set a special timer interrupt
33 * 28.02.92 - made track-buffering routines, based on the routines written
34 * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus.
38 * Automatic floppy-detection and formatting written by Werner Almesberger
39 * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with
40 * the floppy-change signal detection.
44 * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed
45 * FDC data overrun bug, added some preliminary stuff for vertical
48 * 1992/9/17: Added DMA allocation & DMA functions. -- hhb.
50 * TODO: Errors are still not counted properly.
54 * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl)
55 * modeled after the freeware MS-DOS program fdformat/88 V1.8 by
56 * Christoph H. Hochst\"atter.
57 * I have fixed the shift values to the ones I always use. Maybe a new
58 * ioctl() should be created to be able to modify them.
59 * There is a bug in the driver that makes it impossible to format a
60 * floppy as the first thing after bootup.
64 * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and
65 * this helped the floppy driver as well. Much cleaner, and still seems to
69 /* 1994/6/24 --bbroad-- added the floppy table entries and made
70 * minor modifications to allow 2.88 floppies to be run.
73 /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more
78 * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger
79 * format bug fixes, but unfortunately some new bugs too...
82 /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write
83 * errors to allow safe writing by specialized programs.
86 /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks
87 * by defining bit 1 of the "stretch" parameter to mean put sectors on the
88 * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's
89 * drives are "upside-down").
93 * 1995/8/26 -- Andreas Busse -- added Mips support.
97 * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent
98 * features to asm/floppy.h.
102 * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
106 * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of
107 * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting &
108 * use of '0' for NULL.
112 * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation
117 * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives.
121 * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24
122 * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were
123 * being used to store jiffies, which are unsigned longs).
127 * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br>
128 * - get rid of check_region
133 * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no
134 * floppy controller (lingering task on list after module is gone... boom.)
138 * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range
139 * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix
140 * requires many non-obvious changes in arch dependent code.
143 /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>.
144 * Better audit of register_blkdev.
147 #define FLOPPY_SANITY_CHECK
148 #undef FLOPPY_SILENT_DCL_CLEAR
150 #define REALLY_SLOW_IO
153 #define DCL_DEBUG /* debug disk change line */
156 #define debug_dcl(test, fmt, args...) \
157 do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0)
159 #define debug_dcl(test, fmt, args...) \
160 do { if (0) DPRINT(fmt, ##args); } while (0)
164 /* do print messages for unexpected interrupts */
165 static int print_unex = 1;
166 #include <linux/module.h>
167 #include <linux/sched.h>
168 #include <linux/fs.h>
169 #include <linux/kernel.h>
170 #include <linux/timer.h>
171 #include <linux/workqueue.h>
173 #include <linux/fdreg.h>
174 #include <linux/fd.h>
175 #include <linux/hdreg.h>
176 #include <linux/errno.h>
177 #include <linux/slab.h>
178 #include <linux/mm.h>
179 #include <linux/bio.h>
180 #include <linux/string.h>
181 #include <linux/jiffies.h>
182 #include <linux/fcntl.h>
183 #include <linux/delay.h>
184 #include <linux/mc146818rtc.h> /* CMOS defines */
185 #include <linux/ioport.h>
186 #include <linux/interrupt.h>
187 #include <linux/init.h>
188 #include <linux/platform_device.h>
189 #include <linux/mod_devicetable.h>
190 #include <linux/buffer_head.h> /* for invalidate_buffers() */
191 #include <linux/mutex.h>
192 #include <linux/io.h>
193 #include <linux/uaccess.h>
196 * PS/2 floppies have much slower step rates than regular floppies.
197 * It's been recommended that take about 1/4 of the default speed
198 * in some more extreme cases.
200 static int slow_floppy;
204 #include <asm/system.h>
206 static int FLOPPY_IRQ = 6;
207 static int FLOPPY_DMA = 2;
208 static int can_use_virtual_dma = 2;
210 * can use virtual DMA:
211 * 0 = use of virtual DMA disallowed by config
212 * 1 = use of virtual DMA prescribed by config
213 * 2 = no virtual DMA preference configured. By default try hard DMA,
214 * but fall back on virtual DMA when not enough memory available
217 static int use_virtual_dma;
221 * 1 using virtual DMA
222 * This variable is set to virtual when a DMA mem problem arises, and
223 * reset back in floppy_grab_irq_and_dma.
224 * It is not safe to reset it in other circumstances, because the floppy
225 * driver may have several buffers in use at once, and we do currently not
226 * record each buffers capabilities
229 static DEFINE_SPINLOCK(floppy_lock);
231 static unsigned short virtual_dma_port = 0x3f0;
232 irqreturn_t floppy_interrupt(int irq, void *dev_id);
233 static int set_dor(int fdc, char mask, char data);
235 #define K_64 0x10000 /* 64KB */
237 /* the following is the mask of allowed drives. By default units 2 and
238 * 3 of both floppy controllers are disabled, because switching on the
239 * motor of these drives causes system hangs on some PCI computers. drive
240 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
241 * a drive is allowed.
243 * NOTE: This must come before we include the arch floppy header because
244 * some ports reference this variable from there. -DaveM
247 static int allowed_drive_mask = 0x33;
249 #include <asm/floppy.h>
251 static int irqdma_allocated;
253 #include <linux/blkdev.h>
254 #include <linux/blkpg.h>
255 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
256 #include <linux/completion.h>
258 static struct request *current_req;
259 static struct request_queue *floppy_queue;
260 static void do_fd_request(struct request_queue *q);
262 #ifndef fd_get_dma_residue
263 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
266 /* Dma Memory related stuff */
268 #ifndef fd_dma_mem_free
269 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
272 #ifndef fd_dma_mem_alloc
273 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size))
276 static inline void fallback_on_nodma_alloc(char **addr, size_t l)
278 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
280 return; /* we have the memory */
281 if (can_use_virtual_dma != 2)
282 return; /* no fallback allowed */
283 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n");
284 *addr = (char *)nodma_mem_alloc(l);
290 /* End dma memory related stuff */
292 static unsigned long fake_change;
293 static int initialising = 1;
295 #define ITYPE(x) (((x) >> 2) & 0x1f)
296 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
297 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
298 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
299 /* reverse mapping from unit and fdc to drive */
300 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
302 #define DP (&drive_params[current_drive])
303 #define DRS (&drive_state[current_drive])
304 #define DRWE (&write_errors[current_drive])
305 #define FDCS (&fdc_state[fdc])
307 #define UDP (&drive_params[drive])
308 #define UDRS (&drive_state[drive])
309 #define UDRWE (&write_errors[drive])
310 #define UFDCS (&fdc_state[FDC(drive)])
312 #define DPRINT(format, args...) \
313 pr_info("floppy%d: " format, current_drive, ##args)
315 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
316 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
319 #define COMMAND (raw_cmd->cmd[0])
320 #define DR_SELECT (raw_cmd->cmd[1])
321 #define TRACK (raw_cmd->cmd[2])
322 #define HEAD (raw_cmd->cmd[3])
323 #define SECTOR (raw_cmd->cmd[4])
324 #define SIZECODE (raw_cmd->cmd[5])
325 #define SECT_PER_TRACK (raw_cmd->cmd[6])
326 #define GAP (raw_cmd->cmd[7])
327 #define SIZECODE2 (raw_cmd->cmd[8])
331 #define F_SIZECODE (raw_cmd->cmd[2])
332 #define F_SECT_PER_TRACK (raw_cmd->cmd[3])
333 #define F_GAP (raw_cmd->cmd[4])
334 #define F_FILL (raw_cmd->cmd[5])
338 * Maximum disk size (in kilobytes).
339 * This default is used whenever the current disk size is unknown.
340 * [Now it is rather a minimum]
342 #define MAX_DISK_SIZE 4 /* 3984 */
345 * globals used by 'result()'
347 #define MAX_REPLIES 16
348 static unsigned char reply_buffer[MAX_REPLIES];
349 static int inr; /* size of reply buffer, when called from interrupt */
350 #define ST0 (reply_buffer[0])
351 #define ST1 (reply_buffer[1])
352 #define ST2 (reply_buffer[2])
353 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */
354 #define R_TRACK (reply_buffer[3])
355 #define R_HEAD (reply_buffer[4])
356 #define R_SECTOR (reply_buffer[5])
357 #define R_SIZECODE (reply_buffer[6])
359 #define SEL_DLY (2 * HZ / 100)
362 * this struct defines the different floppy drive types.
365 struct floppy_drive_params params;
366 const char *name; /* name printed while booting */
367 } default_drive_params[] = {
368 /* NOTE: the time values in jiffies should be in msec!
370 | Maximum data rate supported by drive type
371 | | Head load time, msec
372 | | | Head unload time, msec (not used)
373 | | | | Step rate interval, usec
374 | | | | | Time needed for spinup time (jiffies)
375 | | | | | | Timeout for spinning down (jiffies)
376 | | | | | | | Spindown offset (where disk stops)
377 | | | | | | | | Select delay
378 | | | | | | | | | RPS
379 | | | | | | | | | | Max number of tracks
380 | | | | | | | | | | | Interrupt timeout
381 | | | | | | | | | | | | Max nonintlv. sectors
382 | | | | | | | | | | | | | -Max Errors- flags */
383 {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0,
384 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" },
386 {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0,
387 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
389 {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0,
390 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
392 {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
393 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/
395 {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
396 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/
398 {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
399 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
401 {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
402 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/
403 /* | --autodetected formats--- | | |
404 * read_track | | Name printed when booting
406 * Frequency of disk change checks */
409 static struct floppy_drive_params drive_params[N_DRIVE];
410 static struct floppy_drive_struct drive_state[N_DRIVE];
411 static struct floppy_write_errors write_errors[N_DRIVE];
412 static struct timer_list motor_off_timer[N_DRIVE];
413 static struct gendisk *disks[N_DRIVE];
414 static struct block_device *opened_bdev[N_DRIVE];
415 static DEFINE_MUTEX(open_lock);
416 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
419 * This struct defines the different floppy types.
421 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
422 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
423 * tells if the disk is in Commodore 1581 format, which means side 0 sectors
424 * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
425 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
426 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
427 * side 0 is on physical side 0 (but with the misnamed sector IDs).
428 * 'stretch' should probably be renamed to something more general, like
431 * Bits 2 through 9 of 'stretch' tell the number of the first sector.
432 * The LSB (bit 2) is flipped. For most disks, the first sector
433 * is 1 (represented by 0x00<<2). For some CP/M and music sampler
434 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
435 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
437 * Other parameters should be self-explanatory (see also setfdprm(8)).
446 | | | | | | Data rate, | 0x40 for perp
447 | | | | | | | Spec1 (stepping rate, head unload
448 | | | | | | | | /fmt gap (gap2) */
449 static struct floppy_struct floppy_type[32] = {
450 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */
451 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
452 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
453 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
454 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
455 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
456 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
457 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
458 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
459 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
461 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
462 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
463 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
464 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
465 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
466 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
467 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
468 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
469 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
470 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
472 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
473 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
474 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
475 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
476 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
477 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
478 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
479 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
480 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
481 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
483 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
484 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
487 #define SECTSIZE (_FD_SECTSIZE(*floppy))
489 /* Auto-detection: Disk type used until the next media change occurs. */
490 static struct floppy_struct *current_type[N_DRIVE];
493 * User-provided type information. current_type points to
494 * the respective entry of this array.
496 static struct floppy_struct user_params[N_DRIVE];
498 static sector_t floppy_sizes[256];
500 static char floppy_device_name[] = "floppy";
503 * The driver is trying to determine the correct media format
504 * while probing is set. rw_interrupt() clears it after a
509 /* Synchronization of FDC access. */
510 #define FD_COMMAND_NONE -1
511 #define FD_COMMAND_ERROR 2
512 #define FD_COMMAND_OKAY 3
514 static volatile int command_status = FD_COMMAND_NONE;
515 static unsigned long fdc_busy;
516 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
517 static DECLARE_WAIT_QUEUE_HEAD(command_done);
519 #define NO_SIGNAL (!interruptible || !signal_pending(current))
521 /* Errors during formatting are counted here. */
522 static int format_errors;
524 /* Format request descriptor. */
525 static struct format_descr format_req;
528 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
529 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
530 * H is head unload time (1=16ms, 2=32ms, etc)
535 * Because these are written to by the DMA controller, they must
536 * not contain a 64k byte boundary crossing, or data will be
539 static char *floppy_track_buffer;
540 static int max_buffer_sectors;
543 typedef void (*done_f)(int);
544 static struct cont_t {
545 void (*interrupt)(void);
546 /* this is called after the interrupt of the
548 void (*redo)(void); /* this is called to retry the operation */
549 void (*error)(void); /* this is called to tally an error */
550 done_f done; /* this is called to say if the operation has
551 * succeeded/failed */
554 static void floppy_ready(void);
555 static void floppy_start(void);
556 static void process_fd_request(void);
557 static void recalibrate_floppy(void);
558 static void floppy_shutdown(unsigned long);
560 static int floppy_request_regions(int);
561 static void floppy_release_regions(int);
562 static int floppy_grab_irq_and_dma(void);
563 static void floppy_release_irq_and_dma(void);
566 * The "reset" variable should be tested whenever an interrupt is scheduled,
567 * after the commands have been sent. This is to ensure that the driver doesn't
568 * get wedged when the interrupt doesn't come because of a failed command.
569 * reset doesn't need to be tested before sending commands, because
570 * output_byte is automatically disabled when reset is set.
572 static void reset_fdc(void);
575 * These are global variables, as that's the easiest way to give
576 * information to interrupts. They are the data used for the current
580 #define NEED_1_RECAL -2
581 #define NEED_2_RECAL -3
583 static int usage_count;
585 /* buffer related variables */
586 static int buffer_track = -1;
587 static int buffer_drive = -1;
588 static int buffer_min = -1;
589 static int buffer_max = -1;
591 /* fdc related variables, should end up in a struct */
592 static struct floppy_fdc_state fdc_state[N_FDC];
593 static int fdc; /* current fdc */
595 static struct floppy_struct *_floppy = floppy_type;
596 static unsigned char current_drive;
597 static long current_count_sectors;
598 static unsigned char fsector_t; /* sector in track */
599 static unsigned char in_sector_offset; /* offset within physical sector,
600 * expressed in units of 512 bytes */
603 static inline int fd_eject(int drive)
614 static long unsigned debugtimer;
616 static inline void set_debugt(void)
618 debugtimer = jiffies;
621 static inline void debugt(const char *message)
623 if (DP->flags & DEBUGT)
624 pr_info("%s dtime=%lu\n", message, jiffies - debugtimer);
627 static inline void set_debugt(void) { }
628 static inline void debugt(const char *message) { }
631 typedef void (*timeout_fn)(unsigned long);
632 static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0);
634 static const char *timeout_message;
636 #ifdef FLOPPY_SANITY_CHECK
637 static void is_alive(const char *message)
639 /* this routine checks whether the floppy driver is "alive" */
640 if (test_bit(0, &fdc_busy) && command_status < 2 &&
641 !timer_pending(&fd_timeout)) {
642 DPRINT("timeout handler died: %s\n", message);
647 static void (*do_floppy)(void) = NULL;
649 #ifdef FLOPPY_SANITY_CHECK
653 static void (*lasthandler)(void);
654 static unsigned long interruptjiffies;
655 static unsigned long resultjiffies;
656 static int resultsize;
657 static unsigned long lastredo;
659 static struct output_log {
661 unsigned char status;
662 unsigned long jiffies;
663 } output_log[OLOGSIZE];
665 static int output_log_pos;
668 #define current_reqD -1
669 #define MAXTIMEOUT -2
671 static void __reschedule_timeout(int drive, const char *message, int marg)
673 if (drive == current_reqD)
674 drive = current_drive;
675 del_timer(&fd_timeout);
676 if (drive < 0 || drive >= N_DRIVE) {
677 fd_timeout.expires = jiffies + 20UL * HZ;
680 fd_timeout.expires = jiffies + UDP->timeout;
681 add_timer(&fd_timeout);
682 if (UDP->flags & FD_DEBUG)
683 DPRINT("reschedule timeout %s %d\n", message, marg);
684 timeout_message = message;
687 static void reschedule_timeout(int drive, const char *message, int marg)
691 spin_lock_irqsave(&floppy_lock, flags);
692 __reschedule_timeout(drive, message, marg);
693 spin_unlock_irqrestore(&floppy_lock, flags);
696 #define INFBOUND(a, b) (a) = max_t(int, a, b)
697 #define SUPBOUND(a, b) (a) = min_t(int, a, b)
700 * Bottom half floppy driver.
701 * ==========================
703 * This part of the file contains the code talking directly to the hardware,
704 * and also the main service loop (seek-configure-spinup-command)
709 * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
710 * and the last_checked date.
712 * last_checked is the date of the last check which showed 'no disk change'
713 * FD_DISK_CHANGE is set under two conditions:
714 * 1. The floppy has been changed after some i/o to that floppy already
716 * 2. No floppy disk is in the drive. This is done in order to ensure that
717 * requests are quickly flushed in case there is no disk in the drive. It
718 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
721 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
722 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
723 * each seek. If a disk is present, the disk change line should also be
724 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
725 * change line is set, this means either that no disk is in the drive, or
726 * that it has been removed since the last seek.
728 * This means that we really have a third possibility too:
729 * The floppy has been changed after the last seek.
732 static int disk_change(int drive)
734 int fdc = FDC(drive);
736 #ifdef FLOPPY_SANITY_CHECK
737 if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
738 DPRINT("WARNING disk change called early\n");
739 if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
740 (FDCS->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)FDCS->dor);
747 debug_dcl(UDP->flags,
748 "checking disk change line for drive %d\n", drive);
749 debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies);
750 debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80);
751 debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags);
753 if (UDP->flags & FD_BROKEN_DCL)
754 return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
755 if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) {
756 set_bit(FD_VERIFY_BIT, &UDRS->flags);
757 /* verify write protection */
759 if (UDRS->maxblock) /* mark it changed */
760 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
762 /* invalidate its geometry */
763 if (UDRS->keep_data >= 0) {
764 if ((UDP->flags & FTD_MSG) &&
765 current_type[drive] != NULL)
766 DPRINT("Disk type is undefined after "
768 current_type[drive] = NULL;
769 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1;
774 UDRS->last_checked = jiffies;
775 clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags);
780 static inline int is_selected(int dor, int unit)
782 return ((dor & (0x10 << unit)) && (dor & 3) == unit);
785 static int set_dor(int fdc, char mask, char data)
789 unsigned char newdor;
790 unsigned char olddor;
792 if (FDCS->address == -1)
796 newdor = (olddor & mask) | data;
797 if (newdor != olddor) {
799 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) {
800 drive = REVDRIVE(fdc, unit);
801 debug_dcl(UDP->flags,
802 "calling disk change from set_dor\n");
806 fd_outb(newdor, FD_DOR);
809 if (!is_selected(olddor, unit) && is_selected(newdor, unit)) {
810 drive = REVDRIVE(fdc, unit);
811 UDRS->select_date = jiffies;
817 static void twaddle(void)
819 if (DP->select_delay)
821 fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR);
822 fd_outb(FDCS->dor, FD_DOR);
823 DRS->select_date = jiffies;
826 /* reset all driver information about the current fdc. This is needed after
827 * a reset, and after a raw command. */
828 static void reset_fdc_info(int mode)
832 FDCS->spec1 = FDCS->spec2 = -1;
833 FDCS->need_configure = 1;
836 for (drive = 0; drive < N_DRIVE; drive++)
837 if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL))
838 UDRS->track = NEED_2_RECAL;
841 /* selects the fdc and drive, and enables the fdc's input/dma. */
842 static void set_fdc(int drive)
844 if (drive >= 0 && drive < N_DRIVE) {
846 current_drive = drive;
848 if (fdc != 1 && fdc != 0) {
849 pr_info("bad fdc value\n");
854 set_dor(1 - fdc, ~8, 0);
856 if (FDCS->rawcmd == 2)
858 if (fd_inb(FD_STATUS) != STATUS_READY)
862 /* locks the driver */
863 static int _lock_fdc(int drive, bool interruptible, int line)
866 pr_err("Trying to lock fdc while usage count=0 at line %d\n",
871 if (test_and_set_bit(0, &fdc_busy)) {
872 DECLARE_WAITQUEUE(wait, current);
873 add_wait_queue(&fdc_wait, &wait);
876 set_current_state(TASK_INTERRUPTIBLE);
878 if (!test_and_set_bit(0, &fdc_busy))
884 remove_wait_queue(&fdc_wait, &wait);
889 set_current_state(TASK_RUNNING);
890 remove_wait_queue(&fdc_wait, &wait);
891 flush_scheduled_work();
893 command_status = FD_COMMAND_NONE;
895 __reschedule_timeout(drive, "lock fdc", 0);
900 #define lock_fdc(drive, interruptible) \
901 _lock_fdc(drive, interruptible, __LINE__)
903 /* unlocks the driver */
904 static inline void unlock_fdc(void)
909 if (!test_bit(0, &fdc_busy))
910 DPRINT("FDC access conflict!\n");
913 DPRINT("device interrupt still active at FDC release: %p!\n",
915 command_status = FD_COMMAND_NONE;
916 spin_lock_irqsave(&floppy_lock, flags);
917 del_timer(&fd_timeout);
919 clear_bit(0, &fdc_busy);
920 if (current_req || blk_peek_request(floppy_queue))
921 do_fd_request(floppy_queue);
922 spin_unlock_irqrestore(&floppy_lock, flags);
926 /* switches the motor off after a given timeout */
927 static void motor_off_callback(unsigned long nr)
929 unsigned char mask = ~(0x10 << UNIT(nr));
931 set_dor(FDC(nr), mask, 0);
934 /* schedules motor off */
935 static void floppy_off(unsigned int drive)
937 unsigned long volatile delta;
938 int fdc = FDC(drive);
940 if (!(FDCS->dor & (0x10 << UNIT(drive))))
943 del_timer(motor_off_timer + drive);
945 /* make spindle stop in a position which minimizes spinup time
948 delta = jiffies - UDRS->first_read_date + HZ -
949 UDP->spindown_offset;
950 delta = ((delta * UDP->rps) % HZ) / UDP->rps;
951 motor_off_timer[drive].expires =
952 jiffies + UDP->spindown - delta;
954 add_timer(motor_off_timer + drive);
958 * cycle through all N_DRIVE floppy drives, for disk change testing.
959 * stopping at current drive. This is done before any long operation, to
960 * be sure to have up to date disk change information.
962 static void scandrives(void)
968 if (DP->select_delay)
971 saved_drive = current_drive;
972 for (i = 0; i < N_DRIVE; i++) {
973 drive = (saved_drive + i + 1) % N_DRIVE;
974 if (UDRS->fd_ref == 0 || UDP->select_delay != 0)
975 continue; /* skip closed drives */
977 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &
978 (0x10 << UNIT(drive))))
979 /* switch the motor off again, if it was off to
981 set_dor(fdc, ~(0x10 << UNIT(drive)), 0);
983 set_fdc(saved_drive);
986 static void empty(void)
990 static DECLARE_WORK(floppy_work, NULL);
992 static void schedule_bh(void (*handler)(void))
994 PREPARE_WORK(&floppy_work, (work_func_t)handler);
995 schedule_work(&floppy_work);
998 static DEFINE_TIMER(fd_timer, NULL, 0, 0);
1000 static void cancel_activity(void)
1002 unsigned long flags;
1004 spin_lock_irqsave(&floppy_lock, flags);
1006 PREPARE_WORK(&floppy_work, (work_func_t)empty);
1007 del_timer(&fd_timer);
1008 spin_unlock_irqrestore(&floppy_lock, flags);
1011 /* this function makes sure that the disk stays in the drive during the
1013 static void fd_watchdog(void)
1015 debug_dcl(DP->flags, "calling disk change from watchdog\n");
1017 if (disk_change(current_drive)) {
1018 DPRINT("disk removed during i/o\n");
1023 del_timer(&fd_timer);
1024 fd_timer.function = (timeout_fn)fd_watchdog;
1025 fd_timer.expires = jiffies + HZ / 10;
1026 add_timer(&fd_timer);
1030 static void main_command_interrupt(void)
1032 del_timer(&fd_timer);
1036 /* waits for a delay (spinup or select) to pass */
1037 static int fd_wait_for_completion(unsigned long delay, timeout_fn function)
1040 reset_fdc(); /* do the reset during sleep to win time
1041 * if we don't need to sleep, it's a good
1042 * occasion anyways */
1046 if (time_before(jiffies, delay)) {
1047 del_timer(&fd_timer);
1048 fd_timer.function = function;
1049 fd_timer.expires = delay;
1050 add_timer(&fd_timer);
1056 static DEFINE_SPINLOCK(floppy_hlt_lock);
1057 static int hlt_disabled;
1058 static void floppy_disable_hlt(void)
1060 unsigned long flags;
1062 spin_lock_irqsave(&floppy_hlt_lock, flags);
1063 if (!hlt_disabled) {
1065 #ifdef HAVE_DISABLE_HLT
1069 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1072 static void floppy_enable_hlt(void)
1074 unsigned long flags;
1076 spin_lock_irqsave(&floppy_hlt_lock, flags);
1079 #ifdef HAVE_DISABLE_HLT
1083 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1086 static void setup_DMA(void)
1090 #ifdef FLOPPY_SANITY_CHECK
1091 if (raw_cmd->length == 0) {
1094 pr_info("zero dma transfer size:");
1095 for (i = 0; i < raw_cmd->cmd_count; i++)
1096 pr_cont("%x,", raw_cmd->cmd[i]);
1102 if (((unsigned long)raw_cmd->kernel_data) % 512) {
1103 pr_info("non aligned address: %p\n", raw_cmd->kernel_data);
1109 f = claim_dma_lock();
1112 if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length,
1113 (raw_cmd->flags & FD_RAW_READ) ?
1114 DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) {
1115 release_dma_lock(f);
1120 release_dma_lock(f);
1123 fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length);
1124 fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ?
1125 DMA_MODE_READ : DMA_MODE_WRITE);
1126 fd_set_dma_addr(raw_cmd->kernel_data);
1127 fd_set_dma_count(raw_cmd->length);
1128 virtual_dma_port = FDCS->address;
1130 release_dma_lock(f);
1132 floppy_disable_hlt();
1135 static void show_floppy(void);
1137 /* waits until the fdc becomes ready */
1138 static int wait_til_ready(void)
1145 for (counter = 0; counter < 10000; counter++) {
1146 status = fd_inb(FD_STATUS);
1147 if (status & STATUS_READY)
1150 if (!initialising) {
1151 DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc);
1158 /* sends a command byte to the fdc */
1159 static int output_byte(char byte)
1161 int status = wait_til_ready();
1165 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY) {
1166 fd_outb(byte, FD_DATA);
1167 #ifdef FLOPPY_SANITY_CHECK
1168 output_log[output_log_pos].data = byte;
1169 output_log[output_log_pos].status = status;
1170 output_log[output_log_pos].jiffies = jiffies;
1171 output_log_pos = (output_log_pos + 1) % OLOGSIZE;
1176 if (!initialising) {
1177 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
1184 /* gets the response from the fdc */
1185 static int result(void)
1190 for (i = 0; i < MAX_REPLIES; i++) {
1191 status = wait_til_ready();
1194 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA;
1195 if ((status & ~STATUS_BUSY) == STATUS_READY) {
1196 #ifdef FLOPPY_SANITY_CHECK
1197 resultjiffies = jiffies;
1202 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY))
1203 reply_buffer[i] = fd_inb(FD_DATA);
1207 if (!initialising) {
1209 ("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
1217 #define MORE_OUTPUT -2
1218 /* does the fdc need more output? */
1219 static int need_more_output(void)
1221 int status = wait_til_ready();
1225 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY)
1230 /* Set perpendicular mode as required, based on data rate, if supported.
1231 * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1233 static inline void perpendicular_mode(void)
1235 unsigned char perp_mode;
1237 if (raw_cmd->rate & 0x40) {
1238 switch (raw_cmd->rate & 3) {
1246 DPRINT("Invalid data rate for perpendicular mode!\n");
1250 * convenient way to return to
1251 * redo without too much hassle
1252 * (deep stack et al.)
1259 if (FDCS->perp_mode == perp_mode)
1261 if (FDCS->version >= FDC_82077_ORIG) {
1262 output_byte(FD_PERPENDICULAR);
1263 output_byte(perp_mode);
1264 FDCS->perp_mode = perp_mode;
1265 } else if (perp_mode) {
1266 DPRINT("perpendicular mode not supported by this FDC.\n");
1268 } /* perpendicular_mode */
1270 static int fifo_depth = 0xa;
1273 static int fdc_configure(void)
1276 output_byte(FD_CONFIGURE);
1277 if (need_more_output() != MORE_OUTPUT)
1280 output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf));
1281 output_byte(0); /* pre-compensation from track
1286 #define NOMINAL_DTR 500
1288 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1289 * head load time, and DMA disable flag to values needed by floppy.
1291 * The value "dtr" is the data transfer rate in Kbps. It is needed
1292 * to account for the data rate-based scaling done by the 82072 and 82077
1293 * FDC types. This parameter is ignored for other types of FDCs (i.e.
1296 * Note that changing the data transfer rate has a (probably deleterious)
1297 * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1298 * fdc_specify is called again after each data transfer rate
1301 * srt: 1000 to 16000 in microseconds
1302 * hut: 16 to 240 milliseconds
1303 * hlt: 2 to 254 milliseconds
1305 * These values are rounded up to the next highest available delay time.
1307 static void fdc_specify(void)
1309 unsigned char spec1;
1310 unsigned char spec2;
1314 unsigned long dtr = NOMINAL_DTR;
1315 unsigned long scale_dtr = NOMINAL_DTR;
1316 int hlt_max_code = 0x7f;
1317 int hut_max_code = 0xf;
1319 if (FDCS->need_configure && FDCS->version >= FDC_82072A) {
1321 FDCS->need_configure = 0;
1324 switch (raw_cmd->rate & 0x03) {
1330 if (FDCS->version >= FDC_82078) {
1331 /* chose the default rate table, not the one
1332 * where 1 = 2 Mbps */
1333 output_byte(FD_DRIVESPEC);
1334 if (need_more_output() == MORE_OUTPUT) {
1335 output_byte(UNIT(current_drive));
1345 if (FDCS->version >= FDC_82072) {
1347 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1348 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1351 /* Convert step rate from microseconds to milliseconds and 4 bits */
1352 srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR);
1359 hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR);
1362 else if (hlt > 0x7f)
1365 hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR);
1371 spec1 = (srt << 4) | hut;
1372 spec2 = (hlt << 1) | (use_virtual_dma & 1);
1374 /* If these parameters did not change, just return with success */
1375 if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) {
1376 /* Go ahead and set spec1 and spec2 */
1377 output_byte(FD_SPECIFY);
1378 output_byte(FDCS->spec1 = spec1);
1379 output_byte(FDCS->spec2 = spec2);
1383 /* Set the FDC's data transfer rate on behalf of the specified drive.
1384 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1385 * of the specify command (i.e. using the fdc_specify function).
1387 static int fdc_dtr(void)
1389 /* If data rate not already set to desired value, set it. */
1390 if ((raw_cmd->rate & 3) == FDCS->dtr)
1394 fd_outb(raw_cmd->rate & 3, FD_DCR);
1396 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1397 * need a stabilization period of several milliseconds to be
1398 * enforced after data rate changes before R/W operations.
1399 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1401 FDCS->dtr = raw_cmd->rate & 3;
1402 return fd_wait_for_completion(jiffies + 2UL * HZ / 100,
1403 (timeout_fn)floppy_ready);
1406 static void tell_sector(void)
1408 pr_cont(": track %d, head %d, sector %d, size %d",
1409 R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE);
1412 static void print_errors(void)
1415 if (ST0 & ST0_ECE) {
1416 pr_cont("Recalibrate failed!");
1417 } else if (ST2 & ST2_CRC) {
1418 pr_cont("data CRC error");
1420 } else if (ST1 & ST1_CRC) {
1421 pr_cont("CRC error");
1423 } else if ((ST1 & (ST1_MAM | ST1_ND)) ||
1426 pr_cont("sector not found");
1429 pr_cont("probe failed...");
1430 } else if (ST2 & ST2_WC) { /* seek error */
1431 pr_cont("wrong cylinder");
1432 } else if (ST2 & ST2_BC) { /* cylinder marked as bad */
1433 pr_cont("bad cylinder");
1435 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
1443 * OK, this error interpreting routine is called after a
1444 * DMA read/write has succeeded
1445 * or failed, so we check the results, and copy any buffers.
1446 * hhb: Added better error reporting.
1447 * ak: Made this into a separate routine.
1449 static int interpret_errors(void)
1454 DPRINT("-- FDC reply error");
1459 /* check IC to find cause of interrupt */
1460 switch (ST0 & ST0_INTR) {
1461 case 0x40: /* error occurred during command execution */
1463 return 0; /* occurs with pseudo-DMA */
1466 DPRINT("Drive is write protected\n");
1467 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
1470 } else if (ST1 & ST1_ND) {
1471 set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags);
1472 } else if (ST1 & ST1_OR) {
1473 if (DP->flags & FTD_MSG)
1474 DPRINT("Over/Underrun - retrying\n");
1476 } else if (*errors >= DP->max_errors.reporting) {
1479 if (ST2 & ST2_WC || ST2 & ST2_BC)
1480 /* wrong cylinder => recal */
1481 DRS->track = NEED_2_RECAL;
1483 case 0x80: /* invalid command given */
1484 DPRINT("Invalid FDC command given!\n");
1488 DPRINT("Abnormal termination caused by polling\n");
1491 default: /* (0) Normal command termination */
1497 * This routine is called when everything should be correctly set up
1498 * for the transfer (i.e. floppy motor is on, the correct floppy is
1499 * selected, and the head is sitting on the right track).
1501 static void setup_rw_floppy(void)
1507 unsigned long ready_date;
1508 timeout_fn function;
1510 flags = raw_cmd->flags;
1511 if (flags & (FD_RAW_READ | FD_RAW_WRITE))
1512 flags |= FD_RAW_INTR;
1514 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) {
1515 ready_date = DRS->spinup_date + DP->spinup;
1516 /* If spinup will take a long time, rerun scandrives
1517 * again just before spinup completion. Beware that
1518 * after scandrives, we must again wait for selection.
1520 if (time_after(ready_date, jiffies + DP->select_delay)) {
1521 ready_date -= DP->select_delay;
1522 function = (timeout_fn)floppy_start;
1524 function = (timeout_fn)setup_rw_floppy;
1526 /* wait until the floppy is spinning fast enough */
1527 if (fd_wait_for_completion(ready_date, function))
1530 dflags = DRS->flags;
1532 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE))
1535 if (flags & FD_RAW_INTR)
1536 do_floppy = main_command_interrupt;
1539 for (i = 0; i < raw_cmd->cmd_count; i++)
1540 r |= output_byte(raw_cmd->cmd[i]);
1542 debugt("rw_command: ");
1550 if (!(flags & FD_RAW_INTR)) {
1553 } else if (flags & FD_RAW_NEED_DISK)
1557 static int blind_seek;
1560 * This is the routine called after every seek (or recalibrate) interrupt
1561 * from the floppy controller.
1563 static void seek_interrupt(void)
1565 debugt("seek interrupt:");
1566 if (inr != 2 || (ST0 & 0xF8) != 0x20) {
1567 DPRINT("seek failed\n");
1568 DRS->track = NEED_2_RECAL;
1573 if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) {
1574 debug_dcl(DP->flags,
1575 "clearing NEWCHANGE flag because of effective seek\n");
1576 debug_dcl(DP->flags, "jiffies=%lu\n", jiffies);
1577 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
1578 /* effective seek */
1579 DRS->select_date = jiffies;
1585 static void check_wp(void)
1587 if (test_bit(FD_VERIFY_BIT, &DRS->flags)) {
1588 /* check write protection */
1589 output_byte(FD_GETSTATUS);
1590 output_byte(UNIT(current_drive));
1591 if (result() != 1) {
1595 clear_bit(FD_VERIFY_BIT, &DRS->flags);
1596 clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags);
1597 debug_dcl(DP->flags,
1598 "checking whether disk is write protected\n");
1599 debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40);
1601 set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
1603 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
1607 static void seek_floppy(void)
1613 debug_dcl(DP->flags, "calling disk change from seek\n");
1615 if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) &&
1616 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) {
1617 /* the media changed flag should be cleared after the seek.
1618 * If it isn't, this means that there is really no disk in
1621 set_bit(FD_DISK_CHANGED_BIT, &DRS->flags);
1626 if (DRS->track <= NEED_1_RECAL) {
1627 recalibrate_floppy();
1629 } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) &&
1630 (raw_cmd->flags & FD_RAW_NEED_DISK) &&
1631 (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) {
1632 /* we seek to clear the media-changed condition. Does anybody
1633 * know a more elegant way, which works on all drives? */
1635 track = raw_cmd->track - 1;
1637 if (DP->flags & FD_SILENT_DCL_CLEAR) {
1638 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0);
1640 raw_cmd->flags |= FD_RAW_NEED_SEEK;
1646 if (raw_cmd->track != DRS->track &&
1647 (raw_cmd->flags & FD_RAW_NEED_SEEK))
1648 track = raw_cmd->track;
1655 do_floppy = seek_interrupt;
1656 output_byte(FD_SEEK);
1657 output_byte(UNIT(current_drive));
1658 if (output_byte(track) < 0) {
1662 debugt("seek command:");
1665 static void recal_interrupt(void)
1667 debugt("recal interrupt:");
1670 else if (ST0 & ST0_ECE) {
1671 switch (DRS->track) {
1673 debugt("recal interrupt need 1 recal:");
1674 /* after a second recalibrate, we still haven't
1675 * reached track 0. Probably no drive. Raise an
1676 * error, as failing immediately might upset
1677 * computers possessed by the Devil :-) */
1682 debugt("recal interrupt need 2 recal:");
1683 /* If we already did a recalibrate,
1684 * and we are not at track 0, this
1685 * means we have moved. (The only way
1686 * not to move at recalibration is to
1687 * be already at track 0.) Clear the
1688 * new change flag */
1689 debug_dcl(DP->flags,
1690 "clearing NEWCHANGE flag because of second recalibrate\n");
1692 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
1693 DRS->select_date = jiffies;
1696 debugt("recal interrupt default:");
1697 /* Recalibrate moves the head by at
1698 * most 80 steps. If after one
1699 * recalibrate we don't have reached
1700 * track 0, this might mean that we
1701 * started beyond track 80. Try
1703 DRS->track = NEED_1_RECAL;
1711 static void print_result(char *message, int inr)
1715 DPRINT("%s ", message);
1717 for (i = 0; i < inr; i++)
1718 pr_cont("repl[%d]=%x ", i, reply_buffer[i]);
1722 /* interrupt handler. Note that this can be called externally on the Sparc */
1723 irqreturn_t floppy_interrupt(int irq, void *dev_id)
1727 void (*handler)(void) = do_floppy;
1729 lasthandler = handler;
1730 interruptjiffies = jiffies;
1732 f = claim_dma_lock();
1734 release_dma_lock(f);
1736 floppy_enable_hlt();
1738 if (fdc >= N_FDC || FDCS->address == -1) {
1739 /* we don't even know which FDC is the culprit */
1740 pr_info("DOR0=%x\n", fdc_state[0].dor);
1741 pr_info("floppy interrupt on bizarre fdc %d\n", fdc);
1742 pr_info("handler=%p\n", handler);
1743 is_alive("bizarre fdc");
1748 /* We have to clear the reset flag here, because apparently on boxes
1749 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
1750 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
1751 * emission of the SENSEI's.
1752 * It is OK to emit floppy commands because we are in an interrupt
1753 * handler here, and thus we have to fear no interference of other
1757 do_print = !handler && print_unex && !initialising;
1761 print_result("unexpected interrupt", inr);
1765 output_byte(FD_SENSEI);
1768 print_result("sensei", inr);
1770 } while ((ST0 & 0x83) != UNIT(current_drive) &&
1771 inr == 2 && max_sensei);
1777 schedule_bh(handler);
1778 is_alive("normal interrupt end");
1780 /* FIXME! Was it really for us? */
1784 static void recalibrate_floppy(void)
1786 debugt("recalibrate floppy:");
1787 do_floppy = recal_interrupt;
1788 output_byte(FD_RECALIBRATE);
1789 if (output_byte(UNIT(current_drive)) < 0) {
1796 * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1798 static void reset_interrupt(void)
1800 debugt("reset interrupt:");
1801 result(); /* get the status ready for set_fdc */
1803 pr_info("reset set in interrupt, calling %p\n", cont->error);
1804 cont->error(); /* a reset just after a reset. BAD! */
1810 * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1811 * or by setting the self clearing bit 7 of STATUS (newer FDCs)
1813 static void reset_fdc(void)
1815 unsigned long flags;
1817 do_floppy = reset_interrupt;
1821 /* Pseudo-DMA may intercept 'reset finished' interrupt. */
1822 /* Irrelevant for systems with true DMA (i386). */
1824 flags = claim_dma_lock();
1826 release_dma_lock(flags);
1828 if (FDCS->version >= FDC_82072A)
1829 fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS);
1831 fd_outb(FDCS->dor & ~0x04, FD_DOR);
1832 udelay(FD_RESET_DELAY);
1833 fd_outb(FDCS->dor, FD_DOR);
1837 static void show_floppy(void)
1842 pr_info("floppy driver state\n");
1843 pr_info("-------------------\n");
1844 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n",
1845 jiffies, interruptjiffies, jiffies - interruptjiffies,
1848 #ifdef FLOPPY_SANITY_CHECK
1849 pr_info("timeout_message=%s\n", timeout_message);
1850 pr_info("last output bytes:\n");
1851 for (i = 0; i < OLOGSIZE; i++)
1852 pr_info("%2x %2x %lu\n",
1853 output_log[(i + output_log_pos) % OLOGSIZE].data,
1854 output_log[(i + output_log_pos) % OLOGSIZE].status,
1855 output_log[(i + output_log_pos) % OLOGSIZE].jiffies);
1856 pr_info("last result at %lu\n", resultjiffies);
1857 pr_info("last redo_fd_request at %lu\n", lastredo);
1858 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1,
1859 reply_buffer, resultsize, true);
1862 pr_info("status=%x\n", fd_inb(FD_STATUS));
1863 pr_info("fdc_busy=%lu\n", fdc_busy);
1865 pr_info("do_floppy=%p\n", do_floppy);
1866 if (work_pending(&floppy_work))
1867 pr_info("floppy_work.func=%p\n", floppy_work.func);
1868 if (timer_pending(&fd_timer))
1869 pr_info("fd_timer.function=%p\n", fd_timer.function);
1870 if (timer_pending(&fd_timeout)) {
1871 pr_info("timer_function=%p\n", fd_timeout.function);
1872 pr_info("expires=%lu\n", fd_timeout.expires - jiffies);
1873 pr_info("now=%lu\n", jiffies);
1875 pr_info("cont=%p\n", cont);
1876 pr_info("current_req=%p\n", current_req);
1877 pr_info("command_status=%d\n", command_status);
1881 static void floppy_shutdown(unsigned long data)
1883 unsigned long flags;
1889 floppy_enable_hlt();
1891 flags = claim_dma_lock();
1893 release_dma_lock(flags);
1895 /* avoid dma going to a random drive after shutdown */
1898 DPRINT("floppy timeout called\n");
1902 cont->redo(); /* this will recall reset when needed */
1904 pr_info("no cont in shutdown!\n");
1905 process_fd_request();
1907 is_alive("floppy shutdown");
1910 /* start motor, check media-changed condition and write protection */
1911 static int start_motor(void (*function)(void))
1917 data = UNIT(current_drive);
1918 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) {
1919 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) {
1921 /* no read since this drive is running */
1922 DRS->first_read_date = 0;
1923 /* note motor start time if motor is not yet running */
1924 DRS->spinup_date = jiffies;
1925 data |= (0x10 << UNIT(current_drive));
1927 } else if (FDCS->dor & (0x10 << UNIT(current_drive)))
1928 mask &= ~(0x10 << UNIT(current_drive));
1930 /* starts motor and selects floppy */
1931 del_timer(motor_off_timer + current_drive);
1932 set_dor(fdc, mask, data);
1934 /* wait_for_completion also schedules reset if needed. */
1935 return fd_wait_for_completion(DRS->select_date + DP->select_delay,
1936 (timeout_fn)function);
1939 static void floppy_ready(void)
1945 if (start_motor(floppy_ready))
1950 debug_dcl(DP->flags, "calling disk change from floppy_ready\n");
1951 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
1952 disk_change(current_drive) && !DP->select_delay)
1953 twaddle(); /* this clears the dcl on certain
1954 * drive/controller combinations */
1956 #ifdef fd_chose_dma_mode
1957 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) {
1958 unsigned long flags = claim_dma_lock();
1959 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length);
1960 release_dma_lock(flags);
1964 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) {
1965 perpendicular_mode();
1966 fdc_specify(); /* must be done here because of hut, hlt ... */
1969 if ((raw_cmd->flags & FD_RAW_READ) ||
1970 (raw_cmd->flags & FD_RAW_WRITE))
1976 static void floppy_start(void)
1978 reschedule_timeout(current_reqD, "floppy start", 0);
1981 debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n");
1982 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
1987 * ========================================================================
1988 * here ends the bottom half. Exported routines are:
1989 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
1990 * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
1991 * Initialization also uses output_byte, result, set_dor, floppy_interrupt
1993 * ========================================================================
1996 * General purpose continuations.
1997 * ==============================
2000 static void do_wakeup(void)
2002 reschedule_timeout(MAXTIMEOUT, "do wakeup", 0);
2004 command_status += 2;
2005 wake_up(&command_done);
2008 static struct cont_t wakeup_cont = {
2012 .done = (done_f)empty
2015 static struct cont_t intr_cont = {
2017 .redo = process_fd_request,
2019 .done = (done_f)empty
2022 static int wait_til_done(void (*handler)(void), bool interruptible)
2026 schedule_bh(handler);
2028 if (command_status < 2 && NO_SIGNAL) {
2029 DECLARE_WAITQUEUE(wait, current);
2031 add_wait_queue(&command_done, &wait);
2033 set_current_state(interruptible ?
2034 TASK_INTERRUPTIBLE :
2035 TASK_UNINTERRUPTIBLE);
2037 if (command_status >= 2 || !NO_SIGNAL)
2040 is_alive("wait_til_done");
2044 set_current_state(TASK_RUNNING);
2045 remove_wait_queue(&command_done, &wait);
2048 if (command_status < 2) {
2056 command_status = FD_COMMAND_ERROR;
2057 if (command_status == FD_COMMAND_OKAY)
2061 command_status = FD_COMMAND_NONE;
2065 static void generic_done(int result)
2067 command_status = result;
2068 cont = &wakeup_cont;
2071 static void generic_success(void)
2076 static void generic_failure(void)
2081 static void success_and_wakeup(void)
2088 * formatting and rw support.
2089 * ==========================
2092 static int next_valid_format(void)
2096 probed_format = DRS->probed_format;
2098 if (probed_format >= 8 || !DP->autodetect[probed_format]) {
2099 DRS->probed_format = 0;
2102 if (floppy_type[DP->autodetect[probed_format]].sect) {
2103 DRS->probed_format = probed_format;
2110 static void bad_flp_intr(void)
2115 DRS->probed_format++;
2116 if (!next_valid_format())
2119 err_count = ++(*errors);
2120 INFBOUND(DRWE->badness, err_count);
2121 if (err_count > DP->max_errors.abort)
2123 if (err_count > DP->max_errors.reset)
2125 else if (err_count > DP->max_errors.recal)
2126 DRS->track = NEED_2_RECAL;
2129 static void set_floppy(int drive)
2131 int type = ITYPE(UDRS->fd_device);
2134 _floppy = floppy_type + type;
2136 _floppy = current_type[drive];
2140 * formatting support.
2141 * ===================
2143 static void format_interrupt(void)
2145 switch (interpret_errors()) {
2156 #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2)
2157 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1))
2158 #define CT(x) ((x) | 0xc0)
2160 static void setup_format_params(int track)
2168 unsigned char track, head, sect, size;
2169 } *here = (struct fparm *)floppy_track_buffer;
2171 raw_cmd = &default_raw_cmd;
2172 raw_cmd->track = track;
2174 raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
2175 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK);
2176 raw_cmd->rate = _floppy->rate & 0x43;
2177 raw_cmd->cmd_count = NR_F;
2178 COMMAND = FM_MODE(_floppy, FD_FORMAT);
2179 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head);
2180 F_SIZECODE = FD_SIZECODE(_floppy);
2181 F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE;
2182 F_GAP = _floppy->fmt_gap;
2183 F_FILL = FD_FILL_BYTE;
2185 raw_cmd->kernel_data = floppy_track_buffer;
2186 raw_cmd->length = 4 * F_SECT_PER_TRACK;
2188 /* allow for about 30ms for data transport per track */
2189 head_shift = (F_SECT_PER_TRACK + 5) / 6;
2191 /* a ``cylinder'' is two tracks plus a little stepping time */
2192 track_shift = 2 * head_shift + 3;
2194 /* position of logical sector 1 on this track */
2195 n = (track_shift * format_req.track + head_shift * format_req.head)
2198 /* determine interleave */
2200 if (_floppy->fmt_gap < 0x22)
2203 /* initialize field */
2204 for (count = 0; count < F_SECT_PER_TRACK; ++count) {
2205 here[count].track = format_req.track;
2206 here[count].head = format_req.head;
2207 here[count].sect = 0;
2208 here[count].size = F_SIZECODE;
2210 /* place logical sectors */
2211 for (count = 1; count <= F_SECT_PER_TRACK; ++count) {
2212 here[n].sect = count;
2213 n = (n + il) % F_SECT_PER_TRACK;
2214 if (here[n].sect) { /* sector busy, find next free sector */
2216 if (n >= F_SECT_PER_TRACK) {
2217 n -= F_SECT_PER_TRACK;
2218 while (here[n].sect)
2223 if (_floppy->stretch & FD_SECTBASEMASK) {
2224 for (count = 0; count < F_SECT_PER_TRACK; count++)
2225 here[count].sect += FD_SECTBASE(_floppy) - 1;
2229 static void redo_format(void)
2232 setup_format_params(format_req.track << STRETCH(_floppy));
2234 debugt("queue format request");
2237 static struct cont_t format_cont = {
2238 .interrupt = format_interrupt,
2239 .redo = redo_format,
2240 .error = bad_flp_intr,
2241 .done = generic_done
2244 static int do_format(int drive, struct format_descr *tmp_format_req)
2248 if (lock_fdc(drive, true))
2253 _floppy->track > DP->tracks ||
2254 tmp_format_req->track >= _floppy->track ||
2255 tmp_format_req->head >= _floppy->head ||
2256 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
2257 !_floppy->fmt_gap) {
2258 process_fd_request();
2261 format_req = *tmp_format_req;
2263 cont = &format_cont;
2264 errors = &format_errors;
2265 ret = wait_til_done(redo_format, true);
2268 process_fd_request();
2273 * Buffer read/write and support
2274 * =============================
2277 static void floppy_end_request(struct request *req, int error)
2279 unsigned int nr_sectors = current_count_sectors;
2280 unsigned int drive = (unsigned long)req->rq_disk->private_data;
2282 /* current_count_sectors can be zero if transfer failed */
2284 nr_sectors = blk_rq_cur_sectors(req);
2285 if (__blk_end_request(req, error, nr_sectors << 9))
2288 /* We're done with the request */
2293 /* new request_done. Can handle physical sectors which are smaller than a
2295 static void request_done(int uptodate)
2297 struct request_queue *q = floppy_queue;
2298 struct request *req = current_req;
2299 unsigned long flags;
2303 reschedule_timeout(MAXTIMEOUT, "request done", uptodate);
2306 pr_info("floppy.c: no request in request_done\n");
2311 /* maintain values for invalidation on geometry
2313 block = current_count_sectors + blk_rq_pos(req);
2314 INFBOUND(DRS->maxblock, block);
2315 if (block > _floppy->sect)
2318 /* unlock chained buffers */
2319 spin_lock_irqsave(q->queue_lock, flags);
2320 floppy_end_request(req, 0);
2321 spin_unlock_irqrestore(q->queue_lock, flags);
2323 if (rq_data_dir(req) == WRITE) {
2324 /* record write error information */
2325 DRWE->write_errors++;
2326 if (DRWE->write_errors == 1) {
2327 DRWE->first_error_sector = blk_rq_pos(req);
2328 DRWE->first_error_generation = DRS->generation;
2330 DRWE->last_error_sector = blk_rq_pos(req);
2331 DRWE->last_error_generation = DRS->generation;
2333 spin_lock_irqsave(q->queue_lock, flags);
2334 floppy_end_request(req, -EIO);
2335 spin_unlock_irqrestore(q->queue_lock, flags);
2339 /* Interrupt handler evaluating the result of the r/w operation */
2340 static void rw_interrupt(void)
2348 /* some Toshiba floppy controllers occasionnally seem to
2349 * return bogus interrupts after read/write operations, which
2350 * can be recognized by a bad head number (>= 2) */
2354 if (!DRS->first_read_date)
2355 DRS->first_read_date = jiffies;
2370 nr_sectors = (((R_TRACK - TRACK) * heads +
2371 R_HEAD - HEAD) * SECT_PER_TRACK +
2372 R_SECTOR - SECTOR + eoc) << SIZECODE >> 2;
2374 #ifdef FLOPPY_SANITY_CHECK
2375 if (nr_sectors / ssize >
2376 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) {
2377 DPRINT("long rw: %x instead of %lx\n",
2378 nr_sectors, current_count_sectors);
2379 pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR);
2380 pr_info("rh=%d h=%d\n", R_HEAD, HEAD);
2381 pr_info("rt=%d t=%d\n", R_TRACK, TRACK);
2382 pr_info("heads=%d eoc=%d\n", heads, eoc);
2383 pr_info("spt=%d st=%d ss=%d\n",
2384 SECT_PER_TRACK, fsector_t, ssize);
2385 pr_info("in_sector_offset=%d\n", in_sector_offset);
2389 nr_sectors -= in_sector_offset;
2390 INFBOUND(nr_sectors, 0);
2391 SUPBOUND(current_count_sectors, nr_sectors);
2393 switch (interpret_errors()) {
2398 if (!current_count_sectors) {
2405 if (!current_count_sectors) {
2409 current_type[current_drive] = _floppy;
2410 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2415 if (DP->flags & FTD_MSG)
2416 DPRINT("Auto-detected floppy type %s in fd%d\n",
2417 _floppy->name, current_drive);
2418 current_type[current_drive] = _floppy;
2419 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2423 if (CT(COMMAND) != FD_READ ||
2424 raw_cmd->kernel_data == current_req->buffer) {
2425 /* transfer directly from buffer */
2427 } else if (CT(COMMAND) == FD_READ) {
2428 buffer_track = raw_cmd->track;
2429 buffer_drive = current_drive;
2430 INFBOUND(buffer_max, nr_sectors + fsector_t);
2435 /* Compute maximal contiguous buffer size. */
2436 static int buffer_chain_size(void)
2440 struct req_iterator iter;
2443 base = bio_data(current_req->bio);
2446 rq_for_each_segment(bv, current_req, iter) {
2447 if (page_address(bv->bv_page) + bv->bv_offset != base + size)
2456 /* Compute the maximal transfer size */
2457 static int transfer_size(int ssize, int max_sector, int max_size)
2459 SUPBOUND(max_sector, fsector_t + max_size);
2462 max_sector -= (max_sector % _floppy->sect) % ssize;
2464 /* transfer size, beginning not aligned */
2465 current_count_sectors = max_sector - fsector_t;
2471 * Move data from/to the track buffer to/from the buffer cache.
2473 static void copy_buffer(int ssize, int max_sector, int max_sector_2)
2475 int remaining; /* number of transferred 512-byte sectors */
2480 struct req_iterator iter;
2482 max_sector = transfer_size(ssize,
2483 min(max_sector, max_sector_2),
2484 blk_rq_sectors(current_req));
2486 if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
2487 buffer_max > fsector_t + blk_rq_sectors(current_req))
2488 current_count_sectors = min_t(int, buffer_max - fsector_t,
2489 blk_rq_sectors(current_req));
2491 remaining = current_count_sectors << 9;
2492 #ifdef FLOPPY_SANITY_CHECK
2493 if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) {
2494 DPRINT("in copy buffer\n");
2495 pr_info("current_count_sectors=%ld\n", current_count_sectors);
2496 pr_info("remaining=%d\n", remaining >> 9);
2497 pr_info("current_req->nr_sectors=%u\n",
2498 blk_rq_sectors(current_req));
2499 pr_info("current_req->current_nr_sectors=%u\n",
2500 blk_rq_cur_sectors(current_req));
2501 pr_info("max_sector=%d\n", max_sector);
2502 pr_info("ssize=%d\n", ssize);
2506 buffer_max = max(max_sector, buffer_max);
2508 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
2510 size = blk_rq_cur_bytes(current_req);
2512 rq_for_each_segment(bv, current_req, iter) {
2517 SUPBOUND(size, remaining);
2519 buffer = page_address(bv->bv_page) + bv->bv_offset;
2520 #ifdef FLOPPY_SANITY_CHECK
2521 if (dma_buffer + size >
2522 floppy_track_buffer + (max_buffer_sectors << 10) ||
2523 dma_buffer < floppy_track_buffer) {
2524 DPRINT("buffer overrun in copy buffer %d\n",
2525 (int)((floppy_track_buffer - dma_buffer) >> 9));
2526 pr_info("fsector_t=%d buffer_min=%d\n",
2527 fsector_t, buffer_min);
2528 pr_info("current_count_sectors=%ld\n",
2529 current_count_sectors);
2530 if (CT(COMMAND) == FD_READ)
2532 if (CT(COMMAND) == FD_WRITE)
2536 if (((unsigned long)buffer) % 512)
2537 DPRINT("%p buffer not aligned\n", buffer);
2539 if (CT(COMMAND) == FD_READ)
2540 memcpy(buffer, dma_buffer, size);
2542 memcpy(dma_buffer, buffer, size);
2547 #ifdef FLOPPY_SANITY_CHECK
2550 max_sector -= remaining >> 9;
2551 DPRINT("weirdness: remaining %d\n", remaining >> 9);
2556 /* work around a bug in pseudo DMA
2557 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2558 * sending data. Hence we need a different way to signal the
2559 * transfer length: We use SECT_PER_TRACK. Unfortunately, this
2560 * does not work with MT, hence we can only transfer one head at
2563 static void virtualdmabug_workaround(void)
2568 if (CT(COMMAND) == FD_WRITE) {
2569 COMMAND &= ~0x80; /* switch off multiple track mode */
2571 hard_sectors = raw_cmd->length >> (7 + SIZECODE);
2572 end_sector = SECTOR + hard_sectors - 1;
2573 #ifdef FLOPPY_SANITY_CHECK
2574 if (end_sector > SECT_PER_TRACK) {
2575 pr_info("too many sectors %d > %d\n",
2576 end_sector, SECT_PER_TRACK);
2580 SECT_PER_TRACK = end_sector;
2581 /* make sure SECT_PER_TRACK
2582 * points to end of transfer */
2587 * Formulate a read/write request.
2588 * this routine decides where to load the data (directly to buffer, or to
2589 * tmp floppy area), how much data to load (the size of the buffer, the whole
2590 * track, or a single sector)
2591 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2592 * allocation on the fly, it should be done here. No other part should need
2596 static int make_raw_rw_request(void)
2598 int aligned_sector_t;
2604 if (max_buffer_sectors == 0) {
2605 pr_info("VFS: Block I/O scheduled on unopened device\n");
2609 set_fdc((long)current_req->rq_disk->private_data);
2611 raw_cmd = &default_raw_cmd;
2612 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK |
2614 raw_cmd->cmd_count = NR_RW;
2615 if (rq_data_dir(current_req) == READ) {
2616 raw_cmd->flags |= FD_RAW_READ;
2617 COMMAND = FM_MODE(_floppy, FD_READ);
2618 } else if (rq_data_dir(current_req) == WRITE) {
2619 raw_cmd->flags |= FD_RAW_WRITE;
2620 COMMAND = FM_MODE(_floppy, FD_WRITE);
2622 DPRINT("make_raw_rw_request: unknown command\n");
2626 max_sector = _floppy->sect * _floppy->head;
2628 TRACK = (int)blk_rq_pos(current_req) / max_sector;
2629 fsector_t = (int)blk_rq_pos(current_req) % max_sector;
2630 if (_floppy->track && TRACK >= _floppy->track) {
2631 if (blk_rq_cur_sectors(current_req) & 1) {
2632 current_count_sectors = 1;
2637 HEAD = fsector_t / _floppy->sect;
2639 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) ||
2640 test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) &&
2641 fsector_t < _floppy->sect)
2642 max_sector = _floppy->sect;
2644 /* 2M disks have phantom sectors on the first track */
2645 if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) {
2646 max_sector = 2 * _floppy->sect / 3;
2647 if (fsector_t >= max_sector) {
2648 current_count_sectors =
2649 min_t(int, _floppy->sect - fsector_t,
2650 blk_rq_sectors(current_req));
2655 SIZECODE = FD_SIZECODE(_floppy);
2656 raw_cmd->rate = _floppy->rate & 0x43;
2657 if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2)
2664 raw_cmd->track = TRACK << STRETCH(_floppy);
2665 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD);
2668 SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
2669 SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) +
2670 FD_SECTBASE(_floppy);
2672 /* tracksize describes the size which can be filled up with sectors
2675 tracksize = _floppy->sect - _floppy->sect % ssize;
2676 if (tracksize < _floppy->sect) {
2678 if (tracksize <= fsector_t % _floppy->sect)
2681 /* if we are beyond tracksize, fill up using smaller sectors */
2682 while (tracksize <= fsector_t % _floppy->sect) {
2683 while (tracksize + ssize > _floppy->sect) {
2691 max_sector = HEAD * _floppy->sect + tracksize;
2692 } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) {
2693 max_sector = _floppy->sect;
2694 } else if (!HEAD && CT(COMMAND) == FD_WRITE) {
2695 /* for virtual DMA bug workaround */
2696 max_sector = _floppy->sect;
2699 in_sector_offset = (fsector_t % _floppy->sect) % ssize;
2700 aligned_sector_t = fsector_t - in_sector_offset;
2701 max_size = blk_rq_sectors(current_req);
2702 if ((raw_cmd->track == buffer_track) &&
2703 (current_drive == buffer_drive) &&
2704 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
2705 /* data already in track buffer */
2706 if (CT(COMMAND) == FD_READ) {
2707 copy_buffer(1, max_sector, buffer_max);
2710 } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) {
2711 if (CT(COMMAND) == FD_WRITE) {
2712 unsigned int sectors;
2714 sectors = fsector_t + blk_rq_sectors(current_req);
2715 if (sectors > ssize && sectors < ssize + ssize)
2716 max_size = ssize + ssize;
2720 raw_cmd->flags &= ~FD_RAW_WRITE;
2721 raw_cmd->flags |= FD_RAW_READ;
2722 COMMAND = FM_MODE(_floppy, FD_READ);
2723 } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) {
2724 unsigned long dma_limit;
2725 int direct, indirect;
2728 transfer_size(ssize, max_sector,
2729 max_buffer_sectors * 2) - fsector_t;
2732 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2733 * on a 64 bit machine!
2735 max_size = buffer_chain_size();
2736 dma_limit = (MAX_DMA_ADDRESS -
2737 ((unsigned long)current_req->buffer)) >> 9;
2738 if ((unsigned long)max_size > dma_limit)
2739 max_size = dma_limit;
2740 /* 64 kb boundaries */
2741 if (CROSS_64KB(current_req->buffer, max_size << 9))
2743 ((unsigned long)current_req->buffer) %
2745 direct = transfer_size(ssize, max_sector, max_size) - fsector_t;
2747 * We try to read tracks, but if we get too many errors, we
2748 * go back to reading just one sector at a time.
2750 * This means we should be able to read a sector even if there
2751 * are other bad sectors on this track.
2754 (indirect * 2 > direct * 3 &&
2755 *errors < DP->max_errors.read_track &&
2757 (DP->read_track & (1 << DRS->probed_format)))))) {
2758 max_size = blk_rq_sectors(current_req);
2760 raw_cmd->kernel_data = current_req->buffer;
2761 raw_cmd->length = current_count_sectors << 9;
2762 if (raw_cmd->length == 0) {
2763 DPRINT("zero dma transfer attempted from make_raw_request\n");
2764 DPRINT("indirect=%d direct=%d fsector_t=%d\n",
2765 indirect, direct, fsector_t);
2768 virtualdmabug_workaround();
2773 if (CT(COMMAND) == FD_READ)
2774 max_size = max_sector; /* unbounded */
2776 /* claim buffer track if needed */
2777 if (buffer_track != raw_cmd->track || /* bad track */
2778 buffer_drive != current_drive || /* bad drive */
2779 fsector_t > buffer_max ||
2780 fsector_t < buffer_min ||
2781 ((CT(COMMAND) == FD_READ ||
2782 (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) &&
2783 max_sector > 2 * max_buffer_sectors + buffer_min &&
2784 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) {
2785 /* not enough space */
2787 buffer_drive = current_drive;
2788 buffer_max = buffer_min = aligned_sector_t;
2790 raw_cmd->kernel_data = floppy_track_buffer +
2791 ((aligned_sector_t - buffer_min) << 9);
2793 if (CT(COMMAND) == FD_WRITE) {
2794 /* copy write buffer to track buffer.
2795 * if we get here, we know that the write
2796 * is either aligned or the data already in the buffer
2797 * (buffer will be overwritten) */
2798 #ifdef FLOPPY_SANITY_CHECK
2799 if (in_sector_offset && buffer_track == -1)
2800 DPRINT("internal error offset !=0 on write\n");
2802 buffer_track = raw_cmd->track;
2803 buffer_drive = current_drive;
2804 copy_buffer(ssize, max_sector,
2805 2 * max_buffer_sectors + buffer_min);
2807 transfer_size(ssize, max_sector,
2808 2 * max_buffer_sectors + buffer_min -
2811 /* round up current_count_sectors to get dma xfer size */
2812 raw_cmd->length = in_sector_offset + current_count_sectors;
2813 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1;
2814 raw_cmd->length <<= 9;
2815 #ifdef FLOPPY_SANITY_CHECK
2816 if ((raw_cmd->length < current_count_sectors << 9) ||
2817 (raw_cmd->kernel_data != current_req->buffer &&
2818 CT(COMMAND) == FD_WRITE &&
2819 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
2820 aligned_sector_t < buffer_min)) ||
2821 raw_cmd->length % (128 << SIZECODE) ||
2822 raw_cmd->length <= 0 || current_count_sectors <= 0) {
2823 DPRINT("fractionary current count b=%lx s=%lx\n",
2824 raw_cmd->length, current_count_sectors);
2825 if (raw_cmd->kernel_data != current_req->buffer)
2826 pr_info("addr=%d, length=%ld\n",
2827 (int)((raw_cmd->kernel_data -
2828 floppy_track_buffer) >> 9),
2829 current_count_sectors);
2830 pr_info("st=%d ast=%d mse=%d msi=%d\n",
2831 fsector_t, aligned_sector_t, max_sector, max_size);
2832 pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE);
2833 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2834 COMMAND, SECTOR, HEAD, TRACK);
2835 pr_info("buffer drive=%d\n", buffer_drive);
2836 pr_info("buffer track=%d\n", buffer_track);
2837 pr_info("buffer_min=%d\n", buffer_min);
2838 pr_info("buffer_max=%d\n", buffer_max);
2842 if (raw_cmd->kernel_data != current_req->buffer) {
2843 if (raw_cmd->kernel_data < floppy_track_buffer ||
2844 current_count_sectors < 0 ||
2845 raw_cmd->length < 0 ||
2846 raw_cmd->kernel_data + raw_cmd->length >
2847 floppy_track_buffer + (max_buffer_sectors << 10)) {
2848 DPRINT("buffer overrun in schedule dma\n");
2849 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n",
2850 fsector_t, buffer_min, raw_cmd->length >> 9);
2851 pr_info("current_count_sectors=%ld\n",
2852 current_count_sectors);
2853 if (CT(COMMAND) == FD_READ)
2855 if (CT(COMMAND) == FD_WRITE)
2859 } else if (raw_cmd->length > blk_rq_bytes(current_req) ||
2860 current_count_sectors > blk_rq_sectors(current_req)) {
2861 DPRINT("buffer overrun in direct transfer\n");
2863 } else if (raw_cmd->length < current_count_sectors << 9) {
2864 DPRINT("more sectors than bytes\n");
2865 pr_info("bytes=%ld\n", raw_cmd->length >> 9);
2866 pr_info("sectors=%ld\n", current_count_sectors);
2868 if (raw_cmd->length == 0) {
2869 DPRINT("zero dma transfer attempted from make_raw_request\n");
2874 virtualdmabug_workaround();
2878 static void redo_fd_request(void)
2880 #define REPEAT {request_done(0); continue; }
2885 if (current_drive < N_DRIVE)
2886 floppy_off(current_drive);
2890 struct request *req;
2892 spin_lock_irq(floppy_queue->queue_lock);
2893 req = blk_fetch_request(floppy_queue);
2894 spin_unlock_irq(floppy_queue->queue_lock);
2902 drive = (long)current_req->rq_disk->private_data;
2904 reschedule_timeout(current_reqD, "redo fd request", 0);
2907 raw_cmd = &default_raw_cmd;
2909 if (start_motor(redo_fd_request))
2911 disk_change(current_drive);
2912 if (test_bit(current_drive, &fake_change) ||
2913 test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) {
2914 DPRINT("disk absent or changed during operation\n");
2917 if (!_floppy) { /* Autodetection */
2919 DRS->probed_format = 0;
2920 if (next_valid_format()) {
2921 DPRINT("no autodetectable formats\n");
2928 floppy_type + DP->autodetect[DRS->probed_format];
2931 errors = &(current_req->errors);
2932 tmp = make_raw_rw_request();
2938 if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags))
2940 schedule_bh(floppy_start);
2941 debugt("queue fd request");
2947 static struct cont_t rw_cont = {
2948 .interrupt = rw_interrupt,
2949 .redo = redo_fd_request,
2950 .error = bad_flp_intr,
2951 .done = request_done
2954 static void process_fd_request(void)
2957 schedule_bh(redo_fd_request);
2960 static void do_fd_request(struct request_queue *q)
2962 if (max_buffer_sectors == 0) {
2963 pr_info("VFS: do_fd_request called on non-open device\n");
2967 if (usage_count == 0) {
2968 pr_info("warning: usage count=0, current_req=%p exiting\n",
2970 pr_info("sect=%ld type=%x flags=%x\n",
2971 (long)blk_rq_pos(current_req), current_req->cmd_type,
2972 current_req->cmd_flags);
2975 if (test_bit(0, &fdc_busy)) {
2976 /* fdc busy, this new request will be treated when the
2977 current one is done */
2978 is_alive("do fd request, old request running");
2981 lock_fdc(MAXTIMEOUT, false);
2982 process_fd_request();
2983 is_alive("do fd request");
2986 static struct cont_t poll_cont = {
2987 .interrupt = success_and_wakeup,
2988 .redo = floppy_ready,
2989 .error = generic_failure,
2990 .done = generic_done
2993 static int poll_drive(bool interruptible, int flag)
2995 /* no auto-sense, just clear dcl */
2996 raw_cmd = &default_raw_cmd;
2997 raw_cmd->flags = flag;
2999 raw_cmd->cmd_count = 0;
3001 debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n");
3002 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
3004 return wait_til_done(floppy_ready, interruptible);
3008 * User triggered reset
3009 * ====================
3012 static void reset_intr(void)
3014 pr_info("weird, reset interrupt called\n");
3017 static struct cont_t reset_cont = {
3018 .interrupt = reset_intr,
3019 .redo = success_and_wakeup,
3020 .error = generic_failure,
3021 .done = generic_done
3024 static int user_reset_fdc(int drive, int arg, bool interruptible)
3028 if (lock_fdc(drive, interruptible))
3031 if (arg == FD_RESET_ALWAYS)
3035 ret = wait_til_done(reset_fdc, interruptible);
3039 process_fd_request();
3044 * Misc Ioctl's and support
3045 * ========================
3047 static inline int fd_copyout(void __user *param, const void *address,
3050 return copy_to_user(param, address, size) ? -EFAULT : 0;
3053 static inline int fd_copyin(void __user *param, void *address,
3056 return copy_from_user(address, param, size) ? -EFAULT : 0;
3059 static inline const char *drive_name(int type, int drive)
3061 struct floppy_struct *floppy;
3064 floppy = floppy_type + type;
3066 if (UDP->native_format)
3067 floppy = floppy_type + UDP->native_format;
3072 return floppy->name;
3078 static void raw_cmd_done(int flag)
3083 raw_cmd->flags |= FD_RAW_FAILURE;
3084 raw_cmd->flags |= FD_RAW_HARDFAILURE;
3086 raw_cmd->reply_count = inr;
3087 if (raw_cmd->reply_count > MAX_REPLIES)
3088 raw_cmd->reply_count = 0;
3089 for (i = 0; i < raw_cmd->reply_count; i++)
3090 raw_cmd->reply[i] = reply_buffer[i];
3092 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3093 unsigned long flags;
3094 flags = claim_dma_lock();
3095 raw_cmd->length = fd_get_dma_residue();
3096 release_dma_lock(flags);
3099 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
3100 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
3101 raw_cmd->flags |= FD_RAW_FAILURE;
3103 if (disk_change(current_drive))
3104 raw_cmd->flags |= FD_RAW_DISK_CHANGE;
3106 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
3107 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
3108 motor_off_callback(current_drive);
3110 if (raw_cmd->next &&
3111 (!(raw_cmd->flags & FD_RAW_FAILURE) ||
3112 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
3113 ((raw_cmd->flags & FD_RAW_FAILURE) ||
3114 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) {
3115 raw_cmd = raw_cmd->next;
3122 static struct cont_t raw_cmd_cont = {
3123 .interrupt = success_and_wakeup,
3124 .redo = floppy_start,
3125 .error = generic_failure,
3126 .done = raw_cmd_done
3129 static inline int raw_cmd_copyout(int cmd, char __user *param,
3130 struct floppy_raw_cmd *ptr)
3135 ret = copy_to_user((void __user *)param, ptr, sizeof(*ptr));
3138 param += sizeof(struct floppy_raw_cmd);
3139 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) {
3140 if (ptr->length >= 0 &&
3141 ptr->length <= ptr->buffer_length) {
3142 long length = ptr->buffer_length - ptr->length;
3143 ret = fd_copyout(ptr->data, ptr->kernel_data,
3154 static void raw_cmd_free(struct floppy_raw_cmd **ptr)
3156 struct floppy_raw_cmd *next;
3157 struct floppy_raw_cmd *this;
3162 if (this->buffer_length) {
3163 fd_dma_mem_free((unsigned long)this->kernel_data,
3164 this->buffer_length);
3165 this->buffer_length = 0;
3173 static inline int raw_cmd_copyin(int cmd, char __user *param,
3174 struct floppy_raw_cmd **rcmd)
3176 struct floppy_raw_cmd *ptr;
3182 ptr = (struct floppy_raw_cmd *)
3183 kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
3187 ret = copy_from_user(ptr, (void __user *)param, sizeof(*ptr));
3191 ptr->buffer_length = 0;
3192 param += sizeof(struct floppy_raw_cmd);
3193 if (ptr->cmd_count > 33)
3194 /* the command may now also take up the space
3195 * initially intended for the reply & the
3196 * reply count. Needed for long 82078 commands
3197 * such as RESTORE, which takes ... 17 command
3198 * bytes. Murphy's law #137: When you reserve
3199 * 16 bytes for a structure, you'll one day
3200 * discover that you really need 17...
3204 for (i = 0; i < 16; i++)
3206 ptr->resultcode = 0;
3207 ptr->kernel_data = NULL;
3209 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3210 if (ptr->length <= 0)
3213 (char *)fd_dma_mem_alloc(ptr->length);
3214 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
3215 if (!ptr->kernel_data)
3217 ptr->buffer_length = ptr->length;
3219 if (ptr->flags & FD_RAW_WRITE) {
3220 ret = fd_copyin(ptr->data, ptr->kernel_data,
3225 rcmd = &(ptr->next);
3226 if (!(ptr->flags & FD_RAW_MORE))
3232 static int raw_cmd_ioctl(int cmd, void __user *param)
3234 struct floppy_raw_cmd *my_raw_cmd;
3239 if (FDCS->rawcmd <= 1)
3241 for (drive = 0; drive < N_DRIVE; drive++) {
3242 if (FDC(drive) != fdc)
3244 if (drive == current_drive) {
3245 if (UDRS->fd_ref > 1) {
3249 } else if (UDRS->fd_ref) {
3258 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
3260 raw_cmd_free(&my_raw_cmd);
3264 raw_cmd = my_raw_cmd;
3265 cont = &raw_cmd_cont;
3266 ret = wait_til_done(floppy_start, true);
3267 debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n");
3269 if (ret != -EINTR && FDCS->reset)
3272 DRS->track = NO_TRACK;
3274 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
3277 raw_cmd_free(&my_raw_cmd);
3281 static int invalidate_drive(struct block_device *bdev)
3283 /* invalidate the buffer track to force a reread */
3284 set_bit((long)bdev->bd_disk->private_data, &fake_change);
3285 process_fd_request();
3286 check_disk_change(bdev);
3290 static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
3291 int drive, int type, struct block_device *bdev)
3295 /* sanity checking for parameters. */
3298 g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) ||
3299 /* check if reserved bits are set */
3300 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0)
3303 if (!capable(CAP_SYS_ADMIN))
3305 mutex_lock(&open_lock);
3306 if (lock_fdc(drive, true)) {
3307 mutex_unlock(&open_lock);
3310 floppy_type[type] = *g;
3311 floppy_type[type].name = "user format";
3312 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
3313 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] =
3314 floppy_type[type].size + 1;
3315 process_fd_request();
3316 for (cnt = 0; cnt < N_DRIVE; cnt++) {
3317 struct block_device *bdev = opened_bdev[cnt];
3318 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
3320 __invalidate_device(bdev);
3322 mutex_unlock(&open_lock);
3326 if (lock_fdc(drive, true))
3328 if (cmd != FDDEFPRM) {
3329 /* notice a disk change immediately, else
3330 * we lose our settings immediately*/
3331 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3334 oldStretch = g->stretch;
3335 user_params[drive] = *g;
3336 if (buffer_drive == drive)
3337 SUPBOUND(buffer_max, user_params[drive].sect);
3338 current_type[drive] = &user_params[drive];
3339 floppy_sizes[drive] = user_params[drive].size;
3340 if (cmd == FDDEFPRM)
3341 DRS->keep_data = -1;
3344 /* invalidation. Invalidate only when needed, i.e.
3345 * when there are already sectors in the buffer cache
3346 * whose number will change. This is useful, because
3347 * mtools often changes the geometry of the disk after
3348 * looking at the boot block */
3349 if (DRS->maxblock > user_params[drive].sect ||
3351 ((user_params[drive].sect ^ oldStretch) &
3352 (FD_SWAPSIDES | FD_SECTBASEMASK)))
3353 invalidate_drive(bdev);
3355 process_fd_request();
3360 /* handle obsolete ioctl's */
3361 static int ioctl_table[] = {
3389 static inline int normalize_ioctl(int *cmd, int *size)
3393 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) {
3394 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) {
3395 *size = _IOC_SIZE(*cmd);
3396 *cmd = ioctl_table[i];
3397 if (*size > _IOC_SIZE(*cmd)) {
3398 pr_info("ioctl not yet supported\n");
3407 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
3410 *g = &floppy_type[type];
3412 if (lock_fdc(drive, false))
3414 if (poll_drive(false, 0) == -EINTR)
3416 process_fd_request();
3417 *g = current_type[drive];
3424 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
3426 int drive = (long)bdev->bd_disk->private_data;
3427 int type = ITYPE(drive_state[drive].fd_device);
3428 struct floppy_struct *g;
3431 ret = get_floppy_geometry(drive, type, &g);
3435 geo->heads = g->head;
3436 geo->sectors = g->sect;
3437 geo->cylinders = g->track;
3441 static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3442 unsigned long param)
3444 #define FD_IOCTL_ALLOWED (mode & (FMODE_WRITE|FMODE_WRITE_IOCTL))
3446 int drive = (long)bdev->bd_disk->private_data;
3447 int type = ITYPE(UDRS->fd_device);
3452 struct floppy_struct g; /* geometry */
3453 struct format_descr f;
3454 struct floppy_max_errors max_errors;
3455 struct floppy_drive_params dp;
3456 } inparam; /* parameters coming from user space */
3457 const char *outparam; /* parameters passed back to user space */
3459 /* convert compatibility eject ioctls into floppy eject ioctl.
3460 * We do this in order to provide a means to eject floppy disks before
3461 * installing the new fdutils package */
3462 if (cmd == CDROMEJECT || /* CD-ROM eject */
3463 cmd == 0x6470) { /* SunOS floppy eject */
3464 DPRINT("obsolete eject ioctl\n");
3465 DPRINT("please use floppycontrol --eject\n");
3469 if (!((cmd & 0xff00) == 0x0200))
3472 /* convert the old style command into a new style command */
3473 ret = normalize_ioctl(&cmd, &size);
3477 /* permission checks */
3478 if (((cmd & 0x40) && !FD_IOCTL_ALLOWED) ||
3479 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
3482 if (WARN_ON(size < 0 || size > sizeof(inparam)))
3486 memset(&inparam, 0, sizeof(inparam));
3487 if (_IOC_DIR(cmd) & _IOC_WRITE) {
3488 ret = fd_copyin((void __user *)param, &inparam, size);
3495 if (UDRS->fd_ref != 1)
3496 /* somebody else has this drive open */
3498 if (lock_fdc(drive, true))
3501 /* do the actual eject. Fails on
3502 * non-Sparc architectures */
3503 ret = fd_eject(UNIT(drive));
3505 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
3506 set_bit(FD_VERIFY_BIT, &UDRS->flags);
3507 process_fd_request();
3510 if (lock_fdc(drive, true))
3512 current_type[drive] = NULL;
3513 floppy_sizes[drive] = MAX_DISK_SIZE << 1;
3514 UDRS->keep_data = 0;
3515 return invalidate_drive(bdev);
3518 return set_geometry(cmd, &inparam.g, drive, type, bdev);
3520 ret = get_floppy_geometry(drive, type,
3521 (struct floppy_struct **)
3527 UDP->flags |= FTD_MSG;
3530 UDP->flags &= ~FTD_MSG;
3533 if (lock_fdc(drive, true))
3535 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3538 process_fd_request();
3539 if (ret & FD_VERIFY)
3541 if (!(ret & FD_DISK_WRITABLE))
3545 if (UDRS->fd_ref != 1)
3547 return do_format(drive, &inparam.f);
3550 if (lock_fdc(drive, true))
3552 return invalidate_drive(bdev);
3553 case FDSETEMSGTRESH:
3554 UDP->max_errors.reporting = (unsigned short)(param & 0x0f);
3557 outparam = (const char *)&UDP->max_errors;
3560 UDP->max_errors = inparam.max_errors;
3563 outparam = drive_name(type, drive);
3564 SUPBOUND(size, strlen(outparam) + 1);
3570 outparam = (const char *)UDP;
3573 if (lock_fdc(drive, true))
3575 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3577 process_fd_request();
3580 outparam = (const char *)UDRS;
3583 return user_reset_fdc(drive, (int)param, true);
3585 outparam = (const char *)UFDCS;
3588 memset(UDRWE, 0, sizeof(*UDRWE));
3591 outparam = (const char *)UDRWE;
3596 if (lock_fdc(drive, true))
3599 i = raw_cmd_ioctl(cmd, (void __user *)param);
3602 process_fd_request();
3605 if (lock_fdc(drive, true))
3608 process_fd_request();
3614 if (_IOC_DIR(cmd) & _IOC_READ)
3615 return fd_copyout((void __user *)param, outparam, size);
3620 static void __init config_types(void)
3622 bool has_drive = false;
3625 /* read drive info out of physical CMOS */
3628 UDP->cmos = FLOPPY0_TYPE;
3630 if (!UDP->cmos && FLOPPY1_TYPE)
3631 UDP->cmos = FLOPPY1_TYPE;
3633 /* FIXME: additional physical CMOS drive detection should go here */
3635 for (drive = 0; drive < N_DRIVE; drive++) {
3636 unsigned int type = UDP->cmos;
3637 struct floppy_drive_params *params;
3638 const char *name = NULL;
3639 static char temparea[32];
3641 if (type < ARRAY_SIZE(default_drive_params)) {
3642 params = &default_drive_params[type].params;
3644 name = default_drive_params[type].name;
3645 allowed_drive_mask |= 1 << drive;
3647 allowed_drive_mask &= ~(1 << drive);
3649 params = &default_drive_params[0].params;
3650 sprintf(temparea, "unknown type %d (usb?)", type);
3654 const char *prepend;
3658 pr_info("Floppy drive(s):");
3663 pr_cont("%s fd%d is %s", prepend, drive, name);
3672 static int floppy_release(struct gendisk *disk, fmode_t mode)
3674 int drive = (long)disk->private_data;
3676 mutex_lock(&open_lock);
3677 if (UDRS->fd_ref < 0)
3679 else if (!UDRS->fd_ref--) {
3680 DPRINT("floppy_release with fd_ref == 0");
3684 opened_bdev[drive] = NULL;
3685 mutex_unlock(&open_lock);
3691 * floppy_open check for aliasing (/dev/fd0 can be the same as
3692 * /dev/PS0 etc), and disallows simultaneous access to the same
3693 * drive with different device numbers.
3695 static int floppy_open(struct block_device *bdev, fmode_t mode)
3697 int drive = (long)bdev->bd_disk->private_data;
3698 int old_dev, new_dev;
3703 mutex_lock(&open_lock);
3704 old_dev = UDRS->fd_device;
3705 if (opened_bdev[drive] && opened_bdev[drive] != bdev)
3708 if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) {
3709 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
3710 set_bit(FD_VERIFY_BIT, &UDRS->flags);
3713 if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL)))
3716 if (mode & FMODE_EXCL)
3721 opened_bdev[drive] = bdev;
3725 if (!floppy_track_buffer) {
3726 /* if opening an ED drive, reserve a big buffer,
3727 * else reserve a small one */
3728 if ((UDP->cmos == 6) || (UDP->cmos == 5))
3729 try = 64; /* Only 48 actually useful */
3731 try = 32; /* Only 24 actually useful */
3733 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3734 if (!tmp && !floppy_track_buffer) {
3735 try >>= 1; /* buffer only one side */
3737 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3739 if (!tmp && !floppy_track_buffer)
3740 fallback_on_nodma_alloc(&tmp, 2048 * try);
3741 if (!tmp && !floppy_track_buffer) {
3742 DPRINT("Unable to allocate DMA memory\n");
3745 if (floppy_track_buffer) {
3747 fd_dma_mem_free((unsigned long)tmp, try * 1024);
3749 buffer_min = buffer_max = -1;
3750 floppy_track_buffer = tmp;
3751 max_buffer_sectors = try;
3755 new_dev = MINOR(bdev->bd_dev);
3756 UDRS->fd_device = new_dev;
3757 set_capacity(disks[drive], floppy_sizes[new_dev]);
3758 if (old_dev != -1 && old_dev != new_dev) {
3759 if (buffer_drive == drive)
3763 if (UFDCS->rawcmd == 1)
3766 if (!(mode & FMODE_NDELAY)) {
3767 if (mode & (FMODE_READ|FMODE_WRITE)) {
3768 UDRS->last_checked = 0;
3769 check_disk_change(bdev);
3770 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags))
3774 if ((mode & FMODE_WRITE) &&
3775 !test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags))
3778 mutex_unlock(&open_lock);
3781 if (UDRS->fd_ref < 0)
3786 opened_bdev[drive] = NULL;
3788 mutex_unlock(&open_lock);
3793 * Check if the disk has been changed or if a change has been faked.
3795 static int check_floppy_change(struct gendisk *disk)
3797 int drive = (long)disk->private_data;
3799 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
3800 test_bit(FD_VERIFY_BIT, &UDRS->flags))
3803 if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) {
3804 lock_fdc(drive, false);
3805 poll_drive(false, 0);
3806 process_fd_request();
3809 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
3810 test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
3811 test_bit(drive, &fake_change) ||
3812 (!ITYPE(UDRS->fd_device) && !current_type[drive]))
3818 * This implements "read block 0" for floppy_revalidate().
3819 * Needed for format autodetection, checking whether there is
3820 * a disk in the drive, and whether that disk is writable.
3823 static void floppy_rb0_complete(struct bio *bio, int err)
3825 complete((struct completion *)bio->bi_private);
3828 static int __floppy_read_block_0(struct block_device *bdev)
3831 struct bio_vec bio_vec;
3832 struct completion complete;
3836 page = alloc_page(GFP_NOIO);
3838 process_fd_request();
3842 size = bdev->bd_block_size;
3847 bio.bi_io_vec = &bio_vec;
3848 bio_vec.bv_page = page;
3849 bio_vec.bv_len = size;
3850 bio_vec.bv_offset = 0;
3856 init_completion(&complete);
3857 bio.bi_private = &complete;
3858 bio.bi_end_io = floppy_rb0_complete;
3860 submit_bio(READ, &bio);
3861 generic_unplug_device(bdev_get_queue(bdev));
3862 process_fd_request();
3863 wait_for_completion(&complete);
3870 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
3871 * the bootblock (block 0). "Autodetection" is also needed to check whether
3872 * there is a disk in the drive at all... Thus we also do it for fixed
3873 * geometry formats */
3874 static int floppy_revalidate(struct gendisk *disk)
3876 int drive = (long)disk->private_data;
3877 #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device))
3881 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
3882 test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
3883 test_bit(drive, &fake_change) || NO_GEOM) {
3884 if (usage_count == 0) {
3885 pr_info("VFS: revalidate called on non-open device.\n");
3888 lock_fdc(drive, false);
3889 cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
3890 test_bit(FD_VERIFY_BIT, &UDRS->flags));
3891 if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)) {
3892 process_fd_request(); /*already done by another thread */
3897 if (buffer_drive == drive)
3899 clear_bit(drive, &fake_change);
3900 clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
3905 res = __floppy_read_block_0(opened_bdev[drive]);
3908 poll_drive(false, FD_RAW_NEED_DISK);
3909 process_fd_request();
3912 set_capacity(disk, floppy_sizes[UDRS->fd_device]);
3916 static const struct block_device_operations floppy_fops = {
3917 .owner = THIS_MODULE,
3918 .open = floppy_open,
3919 .release = floppy_release,
3920 .locked_ioctl = fd_ioctl,
3921 .getgeo = fd_getgeo,
3922 .media_changed = check_floppy_change,
3923 .revalidate_disk = floppy_revalidate,
3927 * Floppy Driver initialization
3928 * =============================
3931 /* Determine the floppy disk controller type */
3932 /* This routine was written by David C. Niemi */
3933 static char __init get_fdc_version(void)
3937 output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */
3942 return FDC_NONE; /* No FDC present ??? */
3943 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3944 pr_info("FDC %d is an 8272A\n", fdc);
3945 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
3948 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
3953 if (!fdc_configure()) {
3954 pr_info("FDC %d is an 82072\n", fdc);
3955 return FDC_82072; /* 82072 doesn't know CONFIGURE */
3958 output_byte(FD_PERPENDICULAR);
3959 if (need_more_output() == MORE_OUTPUT) {
3962 pr_info("FDC %d is an 82072A\n", fdc);
3963 return FDC_82072A; /* 82072A as found on Sparcs. */
3966 output_byte(FD_UNLOCK);
3968 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3969 pr_info("FDC %d is a pre-1991 82077\n", fdc);
3970 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
3973 if ((r != 1) || (reply_buffer[0] != 0x00)) {
3974 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
3978 output_byte(FD_PARTID);
3981 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
3985 if (reply_buffer[0] == 0x80) {
3986 pr_info("FDC %d is a post-1991 82077\n", fdc);
3987 return FDC_82077; /* Revised 82077AA passes all the tests */
3989 switch (reply_buffer[0] >> 5) {
3991 /* Either a 82078-1 or a 82078SL running at 5Volt */
3992 pr_info("FDC %d is an 82078.\n", fdc);
3995 pr_info("FDC %d is a 44pin 82078\n", fdc);
3998 pr_info("FDC %d is a S82078B\n", fdc);
4001 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc);
4004 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n",
4005 fdc, reply_buffer[0] >> 5);
4006 return FDC_82078_UNKN;
4008 } /* get_fdc_version */
4010 /* lilo configuration */
4012 static void __init floppy_set_flags(int *ints, int param, int param2)
4016 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4018 default_drive_params[i].params.flags |= param2;
4020 default_drive_params[i].params.flags &= ~param2;
4022 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param);
4025 static void __init daring(int *ints, int param, int param2)
4029 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4031 default_drive_params[i].params.select_delay = 0;
4032 default_drive_params[i].params.flags |=
4033 FD_SILENT_DCL_CLEAR;
4035 default_drive_params[i].params.select_delay =
4037 default_drive_params[i].params.flags &=
4038 ~FD_SILENT_DCL_CLEAR;
4041 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken");
4044 static void __init set_cmos(int *ints, int dummy, int dummy2)
4046 int current_drive = 0;
4049 DPRINT("wrong number of parameters for CMOS\n");
4052 current_drive = ints[1];
4053 if (current_drive < 0 || current_drive >= 8) {
4054 DPRINT("bad drive for set_cmos\n");
4058 if (current_drive >= 4 && !FDC2)
4062 DPRINT("setting CMOS code to %d\n", ints[2]);
4065 static struct param_table {
4067 void (*fn) (int *ints, int param, int param2);
4071 } config_params[] __initdata = {
4072 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4073 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4074 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0},
4075 {"irq", NULL, &FLOPPY_IRQ, 6, 0},
4076 {"dma", NULL, &FLOPPY_DMA, 2, 0},
4077 {"daring", daring, NULL, 1, 0},
4079 {"two_fdc", NULL, &FDC2, 0x370, 0},
4080 {"one_fdc", NULL, &FDC2, 0, 0},
4082 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL},
4083 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL},
4084 {"messages", floppy_set_flags, NULL, 1, FTD_MSG},
4085 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR},
4086 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG},
4087 {"nodma", NULL, &can_use_virtual_dma, 1, 0},
4088 {"omnibook", NULL, &can_use_virtual_dma, 1, 0},
4089 {"yesdma", NULL, &can_use_virtual_dma, 0, 0},
4090 {"fifo_depth", NULL, &fifo_depth, 0xa, 0},
4091 {"nofifo", NULL, &no_fifo, 0x20, 0},
4092 {"usefifo", NULL, &no_fifo, 0, 0},
4093 {"cmos", set_cmos, NULL, 0, 0},
4094 {"slow", NULL, &slow_floppy, 1, 0},
4095 {"unexpected_interrupts", NULL, &print_unex, 1, 0},
4096 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0},
4097 {"L40SX", NULL, &print_unex, 0, 0}
4102 static int __init floppy_setup(char *str)
4108 str = get_options(str, ARRAY_SIZE(ints), ints);
4110 for (i = 0; i < ARRAY_SIZE(config_params); i++) {
4111 if (strcmp(str, config_params[i].name) == 0) {
4115 param = config_params[i].def_param;
4116 if (config_params[i].fn)
4117 config_params[i].fn(ints, param,
4120 if (config_params[i].var) {
4121 DPRINT("%s=%d\n", str, param);
4122 *config_params[i].var = param;
4129 DPRINT("unknown floppy option [%s]\n", str);
4131 DPRINT("allowed options are:");
4132 for (i = 0; i < ARRAY_SIZE(config_params); i++)
4133 pr_cont(" %s", config_params[i].name);
4136 DPRINT("botched floppy option\n");
4137 DPRINT("Read Documentation/blockdev/floppy.txt\n");
4141 static int have_no_fdc = -ENODEV;
4143 static ssize_t floppy_cmos_show(struct device *dev,
4144 struct device_attribute *attr, char *buf)
4146 struct platform_device *p = to_platform_device(dev);
4150 return sprintf(buf, "%X\n", UDP->cmos);
4153 DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL);
4155 static void floppy_device_release(struct device *dev)
4159 static int floppy_resume(struct device *dev)
4163 for (fdc = 0; fdc < N_FDC; fdc++)
4164 if (FDCS->address != -1)
4165 user_reset_fdc(-1, FD_RESET_ALWAYS, false);
4170 static const struct dev_pm_ops floppy_pm_ops = {
4171 .resume = floppy_resume,
4172 .restore = floppy_resume,
4175 static struct platform_driver floppy_driver = {
4178 .pm = &floppy_pm_ops,
4182 static struct platform_device floppy_device[N_DRIVE];
4184 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
4186 int drive = (*part & 3) | ((*part & 0x80) >> 5);
4187 if (drive >= N_DRIVE ||
4188 !(allowed_drive_mask & (1 << drive)) ||
4189 fdc_state[FDC(drive)].version == FDC_NONE)
4191 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type))
4194 return get_disk(disks[drive]);
4197 static int __init floppy_init(void)
4202 #if defined(CONFIG_PPC)
4203 if (check_legacy_ioport(FDC1))
4209 for (dr = 0; dr < N_DRIVE; dr++) {
4210 disks[dr] = alloc_disk(1);
4216 disks[dr]->major = FLOPPY_MAJOR;
4217 disks[dr]->first_minor = TOMINOR(dr);
4218 disks[dr]->fops = &floppy_fops;
4219 sprintf(disks[dr]->disk_name, "fd%d", dr);
4221 init_timer(&motor_off_timer[dr]);
4222 motor_off_timer[dr].data = dr;
4223 motor_off_timer[dr].function = motor_off_callback;
4226 err = register_blkdev(FLOPPY_MAJOR, "fd");
4230 err = platform_driver_register(&floppy_driver);
4232 goto out_unreg_blkdev;
4234 floppy_queue = blk_init_queue(do_fd_request, &floppy_lock);
4235 if (!floppy_queue) {
4237 goto out_unreg_driver;
4239 blk_queue_max_hw_sectors(floppy_queue, 64);
4241 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
4242 floppy_find, NULL, NULL);
4244 for (i = 0; i < 256; i++)
4246 floppy_sizes[i] = floppy_type[ITYPE(i)].size;
4248 floppy_sizes[i] = MAX_DISK_SIZE << 1;
4250 reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT);
4253 for (i = 0; i < N_FDC; i++) {
4255 memset(FDCS, 0, sizeof(*FDCS));
4258 #if defined(__sparc__) || defined(__mc68000__)
4259 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4263 FDCS->version = FDC_82072A;
4267 use_virtual_dma = can_use_virtual_dma & 1;
4268 fdc_state[0].address = FDC1;
4269 if (fdc_state[0].address == -1) {
4270 del_timer(&fd_timeout);
4272 goto out_unreg_region;
4275 fdc_state[1].address = FDC2;
4278 fdc = 0; /* reset fdc in case of unexpected interrupt */
4279 err = floppy_grab_irq_and_dma();
4281 del_timer(&fd_timeout);
4283 goto out_unreg_region;
4286 /* initialise drive state */
4287 for (drive = 0; drive < N_DRIVE; drive++) {
4288 memset(UDRS, 0, sizeof(*UDRS));
4289 memset(UDRWE, 0, sizeof(*UDRWE));
4290 set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags);
4291 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
4292 set_bit(FD_VERIFY_BIT, &UDRS->flags);
4293 UDRS->fd_device = -1;
4294 floppy_track_buffer = NULL;
4295 max_buffer_sectors = 0;
4298 * Small 10 msec delay to let through any interrupt that
4299 * initialization might have triggered, to not
4300 * confuse detection:
4304 for (i = 0; i < N_FDC; i++) {
4306 FDCS->driver_version = FD_DRIVER_VERSION;
4307 for (unit = 0; unit < 4; unit++)
4308 FDCS->track[unit] = 0;
4309 if (FDCS->address == -1)
4312 if (user_reset_fdc(-1, FD_RESET_ALWAYS, false)) {
4313 /* free ioports reserved by floppy_grab_irq_and_dma() */
4314 floppy_release_regions(fdc);
4316 FDCS->version = FDC_NONE;
4319 /* Try to determine the floppy controller type */
4320 FDCS->version = get_fdc_version();
4321 if (FDCS->version == FDC_NONE) {
4322 /* free ioports reserved by floppy_grab_irq_and_dma() */
4323 floppy_release_regions(fdc);
4327 if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A)
4328 can_use_virtual_dma = 0;
4331 /* Not all FDCs seem to be able to handle the version command
4332 * properly, so force a reset for the standard FDC clones,
4333 * to avoid interrupt garbage.
4335 user_reset_fdc(-1, FD_RESET_ALWAYS, false);
4338 del_timer(&fd_timeout);
4342 DPRINT("no floppy controllers found\n");
4344 goto out_flush_work;
4347 for (drive = 0; drive < N_DRIVE; drive++) {
4348 if (!(allowed_drive_mask & (1 << drive)))
4350 if (fdc_state[FDC(drive)].version == FDC_NONE)
4353 floppy_device[drive].name = floppy_device_name;
4354 floppy_device[drive].id = drive;
4355 floppy_device[drive].dev.release = floppy_device_release;
4357 err = platform_device_register(&floppy_device[drive]);
4359 goto out_flush_work;
4361 err = device_create_file(&floppy_device[drive].dev,
4364 goto out_unreg_platform_dev;
4366 /* to be cleaned up... */
4367 disks[drive]->private_data = (void *)(long)drive;
4368 disks[drive]->queue = floppy_queue;
4369 disks[drive]->flags |= GENHD_FL_REMOVABLE;
4370 disks[drive]->driverfs_dev = &floppy_device[drive].dev;
4371 add_disk(disks[drive]);
4376 out_unreg_platform_dev:
4377 platform_device_unregister(&floppy_device[drive]);
4379 flush_scheduled_work();
4381 floppy_release_irq_and_dma();
4383 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4384 blk_cleanup_queue(floppy_queue);
4386 platform_driver_unregister(&floppy_driver);
4388 unregister_blkdev(FLOPPY_MAJOR, "fd");
4391 del_timer(&motor_off_timer[dr]);
4392 put_disk(disks[dr]);
4397 static DEFINE_SPINLOCK(floppy_usage_lock);
4399 static const struct io_region {
4404 /* address + 3 is sometimes reserved by pnp bios for motherboard */
4406 /* address + 6 is reserved, and may be taken by IDE.
4407 * Unfortunately, Adaptec doesn't know this :-(, */
4411 static void floppy_release_allocated_regions(int fdc, const struct io_region *p)
4413 while (p != io_regions) {
4415 release_region(FDCS->address + p->offset, p->size);
4419 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
4421 static int floppy_request_regions(int fdc)
4423 const struct io_region *p;
4425 for (p = io_regions; p < ARRAY_END(io_regions); p++) {
4426 if (!request_region(FDCS->address + p->offset,
4427 p->size, "floppy")) {
4428 DPRINT("Floppy io-port 0x%04lx in use\n",
4429 FDCS->address + p->offset);
4430 floppy_release_allocated_regions(fdc, p);
4437 static void floppy_release_regions(int fdc)
4439 floppy_release_allocated_regions(fdc, ARRAY_END(io_regions));
4442 static int floppy_grab_irq_and_dma(void)
4444 unsigned long flags;
4446 spin_lock_irqsave(&floppy_usage_lock, flags);
4447 if (usage_count++) {
4448 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4451 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4454 * We might have scheduled a free_irq(), wait it to
4457 flush_scheduled_work();
4459 if (fd_request_irq()) {
4460 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4462 spin_lock_irqsave(&floppy_usage_lock, flags);
4464 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4467 if (fd_request_dma()) {
4468 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4470 if (can_use_virtual_dma & 2)
4471 use_virtual_dma = can_use_virtual_dma = 1;
4472 if (!(can_use_virtual_dma & 1)) {
4474 spin_lock_irqsave(&floppy_usage_lock, flags);
4476 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4481 for (fdc = 0; fdc < N_FDC; fdc++) {
4482 if (FDCS->address != -1) {
4483 if (floppy_request_regions(fdc))
4487 for (fdc = 0; fdc < N_FDC; fdc++) {
4488 if (FDCS->address != -1) {
4490 fd_outb(FDCS->dor, FD_DOR);
4494 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4496 for (fdc = 0; fdc < N_FDC; fdc++)
4497 if (FDCS->address != -1)
4498 fd_outb(FDCS->dor, FD_DOR);
4500 * The driver will try and free resources and relies on us
4501 * to know if they were allocated or not.
4504 irqdma_allocated = 1;
4510 floppy_release_regions(fdc);
4511 spin_lock_irqsave(&floppy_usage_lock, flags);
4513 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4517 static void floppy_release_irq_and_dma(void)
4520 #ifdef FLOPPY_SANITY_CHECK
4526 unsigned long tmpaddr;
4527 unsigned long flags;
4529 spin_lock_irqsave(&floppy_usage_lock, flags);
4530 if (--usage_count) {
4531 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4534 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4535 if (irqdma_allocated) {
4539 irqdma_allocated = 0;
4545 floppy_enable_hlt();
4547 if (floppy_track_buffer && max_buffer_sectors) {
4548 tmpsize = max_buffer_sectors * 1024;
4549 tmpaddr = (unsigned long)floppy_track_buffer;
4550 floppy_track_buffer = NULL;
4551 max_buffer_sectors = 0;
4552 buffer_min = buffer_max = -1;
4553 fd_dma_mem_free(tmpaddr, tmpsize);
4555 #ifdef FLOPPY_SANITY_CHECK
4557 for (drive = 0; drive < N_FDC * 4; drive++)
4558 if (timer_pending(motor_off_timer + drive))
4559 pr_info("motor off timer %d still active\n", drive);
4562 if (timer_pending(&fd_timeout))
4563 pr_info("floppy timer still active:%s\n", timeout_message);
4564 if (timer_pending(&fd_timer))
4565 pr_info("auxiliary floppy timer still active\n");
4566 if (work_pending(&floppy_work))
4567 pr_info("work still pending\n");
4570 for (fdc = 0; fdc < N_FDC; fdc++)
4571 if (FDCS->address != -1)
4572 floppy_release_regions(fdc);
4578 static char *floppy;
4580 static void __init parse_floppy_cfg_string(char *cfg)
4586 while (*cfg && *cfg != ' ' && *cfg != '\t')
4597 static int __init floppy_module_init(void)
4600 parse_floppy_cfg_string(floppy);
4601 return floppy_init();
4603 module_init(floppy_module_init);
4605 static void __exit floppy_module_exit(void)
4609 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4610 unregister_blkdev(FLOPPY_MAJOR, "fd");
4611 platform_driver_unregister(&floppy_driver);
4613 for (drive = 0; drive < N_DRIVE; drive++) {
4614 del_timer_sync(&motor_off_timer[drive]);
4616 if ((allowed_drive_mask & (1 << drive)) &&
4617 fdc_state[FDC(drive)].version != FDC_NONE) {
4618 del_gendisk(disks[drive]);
4619 device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
4620 platform_device_unregister(&floppy_device[drive]);
4622 put_disk(disks[drive]);
4625 del_timer_sync(&fd_timeout);
4626 del_timer_sync(&fd_timer);
4627 blk_cleanup_queue(floppy_queue);
4630 floppy_release_irq_and_dma();
4632 /* eject disk, if any */
4636 module_exit(floppy_module_exit);
4638 module_param(floppy, charp, 0);
4639 module_param(FLOPPY_IRQ, int, 0);
4640 module_param(FLOPPY_DMA, int, 0);
4641 MODULE_AUTHOR("Alain L. Knaff");
4642 MODULE_SUPPORTED_DEVICE("fd");
4643 MODULE_LICENSE("GPL");
4645 /* This doesn't actually get used other than for module information */
4646 static const struct pnp_device_id floppy_pnpids[] = {
4651 MODULE_DEVICE_TABLE(pnp, floppy_pnpids);
4655 __setup("floppy=", floppy_setup);
4656 module_init(floppy_init)
4659 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);