2 * linux/drivers/block/floppy.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 * Copyright (C) 1993, 1994 Alain Knaff
6 * Copyright (C) 1998 Alan Cox
10 * 02.12.91 - Changed to static variables to indicate need for reset
11 * and recalibrate. This makes some things easier (output_byte reset
12 * checking etc), and means less interrupt jumping in case of errors,
13 * so the code is hopefully easier to understand.
17 * This file is certainly a mess. I've tried my best to get it working,
18 * but I don't like programming floppies, and I have only one anyway.
19 * Urgel. I should check for more errors, and do more graceful error
20 * recovery. Seems there are problems with several drives. I've tried to
21 * correct them. No promises.
25 * As with hd.c, all routines within this file can (and will) be called
26 * by interrupts, so extreme caution is needed. A hardware interrupt
27 * handler may not sleep, or a kernel panic will happen. Thus I cannot
28 * call "floppy-on" directly, but have to set a special timer interrupt
33 * 28.02.92 - made track-buffering routines, based on the routines written
34 * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus.
38 * Automatic floppy-detection and formatting written by Werner Almesberger
39 * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with
40 * the floppy-change signal detection.
44 * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed
45 * FDC data overrun bug, added some preliminary stuff for vertical
48 * 1992/9/17: Added DMA allocation & DMA functions. -- hhb.
50 * TODO: Errors are still not counted properly.
54 * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl)
55 * modeled after the freeware MS-DOS program fdformat/88 V1.8 by
56 * Christoph H. Hochst\"atter.
57 * I have fixed the shift values to the ones I always use. Maybe a new
58 * ioctl() should be created to be able to modify them.
59 * There is a bug in the driver that makes it impossible to format a
60 * floppy as the first thing after bootup.
64 * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and
65 * this helped the floppy driver as well. Much cleaner, and still seems to
69 /* 1994/6/24 --bbroad-- added the floppy table entries and made
70 * minor modifications to allow 2.88 floppies to be run.
73 /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more
78 * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger
79 * format bug fixes, but unfortunately some new bugs too...
82 /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write
83 * errors to allow safe writing by specialized programs.
86 /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks
87 * by defining bit 1 of the "stretch" parameter to mean put sectors on the
88 * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's
89 * drives are "upside-down").
93 * 1995/8/26 -- Andreas Busse -- added Mips support.
97 * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent
98 * features to asm/floppy.h.
102 * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
106 * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of
107 * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting &
108 * use of '0' for NULL.
112 * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation
117 * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives.
121 * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24
122 * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were
123 * being used to store jiffies, which are unsigned longs).
127 * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br>
128 * - get rid of check_region
133 * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no
134 * floppy controller (lingering task on list after module is gone... boom.)
138 * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range
139 * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix
140 * requires many non-obvious changes in arch dependent code.
143 /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>.
144 * Better audit of register_blkdev.
147 #define FLOPPY_SANITY_CHECK
148 #undef FLOPPY_SILENT_DCL_CLEAR
150 #define REALLY_SLOW_IO
153 #define DCL_DEBUG /* debug disk change line */
155 /* do print messages for unexpected interrupts */
156 static int print_unex = 1;
157 #include <linux/module.h>
158 #include <linux/sched.h>
159 #include <linux/fs.h>
160 #include <linux/kernel.h>
161 #include <linux/timer.h>
162 #include <linux/workqueue.h>
164 #include <linux/fdreg.h>
165 #include <linux/fd.h>
166 #include <linux/hdreg.h>
167 #include <linux/errno.h>
168 #include <linux/slab.h>
169 #include <linux/mm.h>
170 #include <linux/bio.h>
171 #include <linux/string.h>
172 #include <linux/jiffies.h>
173 #include <linux/fcntl.h>
174 #include <linux/delay.h>
175 #include <linux/mc146818rtc.h> /* CMOS defines */
176 #include <linux/ioport.h>
177 #include <linux/interrupt.h>
178 #include <linux/init.h>
179 #include <linux/platform_device.h>
180 #include <linux/mod_devicetable.h>
181 #include <linux/buffer_head.h> /* for invalidate_buffers() */
182 #include <linux/mutex.h>
183 #include <linux/io.h>
184 #include <linux/uaccess.h>
187 * PS/2 floppies have much slower step rates than regular floppies.
188 * It's been recommended that take about 1/4 of the default speed
189 * in some more extreme cases.
191 static int slow_floppy;
195 #include <asm/system.h>
197 static int FLOPPY_IRQ = 6;
198 static int FLOPPY_DMA = 2;
199 static int can_use_virtual_dma = 2;
201 * can use virtual DMA:
202 * 0 = use of virtual DMA disallowed by config
203 * 1 = use of virtual DMA prescribed by config
204 * 2 = no virtual DMA preference configured. By default try hard DMA,
205 * but fall back on virtual DMA when not enough memory available
208 static int use_virtual_dma;
212 * 1 using virtual DMA
213 * This variable is set to virtual when a DMA mem problem arises, and
214 * reset back in floppy_grab_irq_and_dma.
215 * It is not safe to reset it in other circumstances, because the floppy
216 * driver may have several buffers in use at once, and we do currently not
217 * record each buffers capabilities
220 static DEFINE_SPINLOCK(floppy_lock);
222 static unsigned short virtual_dma_port = 0x3f0;
223 irqreturn_t floppy_interrupt(int irq, void *dev_id);
224 static int set_dor(int fdc, char mask, char data);
226 #define K_64 0x10000 /* 64KB */
228 /* the following is the mask of allowed drives. By default units 2 and
229 * 3 of both floppy controllers are disabled, because switching on the
230 * motor of these drives causes system hangs on some PCI computers. drive
231 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
232 * a drive is allowed.
234 * NOTE: This must come before we include the arch floppy header because
235 * some ports reference this variable from there. -DaveM
238 static int allowed_drive_mask = 0x33;
240 #include <asm/floppy.h>
242 static int irqdma_allocated;
244 #define DEVICE_NAME "floppy"
246 #include <linux/blkdev.h>
247 #include <linux/blkpg.h>
248 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
249 #include <linux/completion.h>
251 static struct request *current_req;
252 static struct request_queue *floppy_queue;
253 static void do_fd_request(struct request_queue *q);
255 #ifndef fd_get_dma_residue
256 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
259 /* Dma Memory related stuff */
261 #ifndef fd_dma_mem_free
262 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
265 #ifndef fd_dma_mem_alloc
266 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size))
269 static inline void fallback_on_nodma_alloc(char **addr, size_t l)
271 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
273 return; /* we have the memory */
274 if (can_use_virtual_dma != 2)
275 return; /* no fallback allowed */
276 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n");
277 *addr = (char *)nodma_mem_alloc(l);
283 /* End dma memory related stuff */
285 static unsigned long fake_change;
286 static int initialising = 1;
288 #define ITYPE(x) (((x) >> 2) & 0x1f)
289 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
290 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
291 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
292 /* reverse mapping from unit and fdc to drive */
293 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
295 #define DP (&drive_params[current_drive])
296 #define DRS (&drive_state[current_drive])
297 #define DRWE (&write_errors[current_drive])
298 #define FDCS (&fdc_state[fdc])
299 #define CLEARF(x) clear_bit(x##_BIT, &DRS->flags)
300 #define SETF(x) set_bit(x##_BIT, &DRS->flags)
301 #define TESTF(x) test_bit(x##_BIT, &DRS->flags)
303 #define UDP (&drive_params[drive])
304 #define UDRS (&drive_state[drive])
305 #define UDRWE (&write_errors[drive])
306 #define UFDCS (&fdc_state[FDC(drive)])
307 #define UCLEARF(x) clear_bit(x##_BIT, &UDRS->flags)
308 #define USETF(x) set_bit(x##_BIT, &UDRS->flags)
309 #define UTESTF(x) test_bit(x##_BIT, &UDRS->flags)
311 #define DPRINT(format, args...) \
312 pr_info(DEVICE_NAME "%d: " format, current_drive, ##args)
314 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
315 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
318 #define COMMAND (raw_cmd->cmd[0])
319 #define DR_SELECT (raw_cmd->cmd[1])
320 #define TRACK (raw_cmd->cmd[2])
321 #define HEAD (raw_cmd->cmd[3])
322 #define SECTOR (raw_cmd->cmd[4])
323 #define SIZECODE (raw_cmd->cmd[5])
324 #define SECT_PER_TRACK (raw_cmd->cmd[6])
325 #define GAP (raw_cmd->cmd[7])
326 #define SIZECODE2 (raw_cmd->cmd[8])
330 #define F_SIZECODE (raw_cmd->cmd[2])
331 #define F_SECT_PER_TRACK (raw_cmd->cmd[3])
332 #define F_GAP (raw_cmd->cmd[4])
333 #define F_FILL (raw_cmd->cmd[5])
337 * Maximum disk size (in kilobytes).
338 * This default is used whenever the current disk size is unknown.
339 * [Now it is rather a minimum]
341 #define MAX_DISK_SIZE 4 /* 3984 */
344 * globals used by 'result()'
346 #define MAX_REPLIES 16
347 static unsigned char reply_buffer[MAX_REPLIES];
348 static int inr; /* size of reply buffer, when called from interrupt */
349 #define ST0 (reply_buffer[0])
350 #define ST1 (reply_buffer[1])
351 #define ST2 (reply_buffer[2])
352 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */
353 #define R_TRACK (reply_buffer[3])
354 #define R_HEAD (reply_buffer[4])
355 #define R_SECTOR (reply_buffer[5])
356 #define R_SIZECODE (reply_buffer[6])
358 #define SEL_DLY (2 * HZ / 100)
361 * this struct defines the different floppy drive types.
364 struct floppy_drive_params params;
365 const char *name; /* name printed while booting */
366 } default_drive_params[] = {
367 /* NOTE: the time values in jiffies should be in msec!
369 | Maximum data rate supported by drive type
370 | | Head load time, msec
371 | | | Head unload time, msec (not used)
372 | | | | Step rate interval, usec
373 | | | | | Time needed for spinup time (jiffies)
374 | | | | | | Timeout for spinning down (jiffies)
375 | | | | | | | Spindown offset (where disk stops)
376 | | | | | | | | Select delay
377 | | | | | | | | | RPS
378 | | | | | | | | | | Max number of tracks
379 | | | | | | | | | | | Interrupt timeout
380 | | | | | | | | | | | | Max nonintlv. sectors
381 | | | | | | | | | | | | | -Max Errors- flags */
382 {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0,
383 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" },
385 {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0,
386 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
388 {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0,
389 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
391 {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
392 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/
394 {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
395 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/
397 {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
398 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
400 {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
401 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/
402 /* | --autodetected formats--- | | |
403 * read_track | | Name printed when booting
405 * Frequency of disk change checks */
408 static struct floppy_drive_params drive_params[N_DRIVE];
409 static struct floppy_drive_struct drive_state[N_DRIVE];
410 static struct floppy_write_errors write_errors[N_DRIVE];
411 static struct timer_list motor_off_timer[N_DRIVE];
412 static struct gendisk *disks[N_DRIVE];
413 static struct block_device *opened_bdev[N_DRIVE];
414 static DEFINE_MUTEX(open_lock);
415 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
418 * This struct defines the different floppy types.
420 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
421 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
422 * tells if the disk is in Commodore 1581 format, which means side 0 sectors
423 * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
424 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
425 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
426 * side 0 is on physical side 0 (but with the misnamed sector IDs).
427 * 'stretch' should probably be renamed to something more general, like
430 * Bits 2 through 9 of 'stretch' tell the number of the first sector.
431 * The LSB (bit 2) is flipped. For most disks, the first sector
432 * is 1 (represented by 0x00<<2). For some CP/M and music sampler
433 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
434 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
436 * Other parameters should be self-explanatory (see also setfdprm(8)).
445 | | | | | | Data rate, | 0x40 for perp
446 | | | | | | | Spec1 (stepping rate, head unload
447 | | | | | | | | /fmt gap (gap2) */
448 static struct floppy_struct floppy_type[32] = {
449 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */
450 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
451 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
452 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
453 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
454 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
455 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
456 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
457 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
458 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
460 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
461 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
462 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
463 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
464 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
465 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
466 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
467 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
468 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
469 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
471 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
472 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
473 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
474 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
475 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
476 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
477 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
478 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
479 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
480 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
482 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
483 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
486 #define SECTSIZE (_FD_SECTSIZE(*floppy))
488 /* Auto-detection: Disk type used until the next media change occurs. */
489 static struct floppy_struct *current_type[N_DRIVE];
492 * User-provided type information. current_type points to
493 * the respective entry of this array.
495 static struct floppy_struct user_params[N_DRIVE];
497 static sector_t floppy_sizes[256];
499 static char floppy_device_name[] = "floppy";
502 * The driver is trying to determine the correct media format
503 * while probing is set. rw_interrupt() clears it after a
508 /* Synchronization of FDC access. */
509 #define FD_COMMAND_NONE -1
510 #define FD_COMMAND_ERROR 2
511 #define FD_COMMAND_OKAY 3
513 static volatile int command_status = FD_COMMAND_NONE;
514 static unsigned long fdc_busy;
515 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
516 static DECLARE_WAIT_QUEUE_HEAD(command_done);
518 #define NO_SIGNAL (!interruptible || !signal_pending(current))
519 #define CALL(x) if ((x) == -EINTR) return -EINTR
520 #define ECALL(x) if ((ret = (x))) return ret;
521 #define _WAIT(x,i) CALL(ret=wait_til_done((x),i))
522 #define WAIT(x) _WAIT((x),interruptible)
523 #define IWAIT(x) _WAIT((x),1)
525 /* Errors during formatting are counted here. */
526 static int format_errors;
528 /* Format request descriptor. */
529 static struct format_descr format_req;
532 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
533 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
534 * H is head unload time (1=16ms, 2=32ms, etc)
539 * Because these are written to by the DMA controller, they must
540 * not contain a 64k byte boundary crossing, or data will be
543 static char *floppy_track_buffer;
544 static int max_buffer_sectors;
547 typedef void (*done_f)(int);
548 static struct cont_t {
549 void (*interrupt)(void);
550 /* this is called after the interrupt of the
552 void (*redo)(void); /* this is called to retry the operation */
553 void (*error)(void); /* this is called to tally an error */
554 done_f done; /* this is called to say if the operation has
555 * succeeded/failed */
558 static void floppy_ready(void);
559 static void floppy_start(void);
560 static void process_fd_request(void);
561 static void recalibrate_floppy(void);
562 static void floppy_shutdown(unsigned long);
564 static int floppy_request_regions(int);
565 static void floppy_release_regions(int);
566 static int floppy_grab_irq_and_dma(void);
567 static void floppy_release_irq_and_dma(void);
570 * The "reset" variable should be tested whenever an interrupt is scheduled,
571 * after the commands have been sent. This is to ensure that the driver doesn't
572 * get wedged when the interrupt doesn't come because of a failed command.
573 * reset doesn't need to be tested before sending commands, because
574 * output_byte is automatically disabled when reset is set.
576 static void reset_fdc(void);
579 * These are global variables, as that's the easiest way to give
580 * information to interrupts. They are the data used for the current
584 #define NEED_1_RECAL -2
585 #define NEED_2_RECAL -3
587 static int usage_count;
589 /* buffer related variables */
590 static int buffer_track = -1;
591 static int buffer_drive = -1;
592 static int buffer_min = -1;
593 static int buffer_max = -1;
595 /* fdc related variables, should end up in a struct */
596 static struct floppy_fdc_state fdc_state[N_FDC];
597 static int fdc; /* current fdc */
599 static struct floppy_struct *_floppy = floppy_type;
600 static unsigned char current_drive;
601 static long current_count_sectors;
602 static unsigned char fsector_t; /* sector in track */
603 static unsigned char in_sector_offset; /* offset within physical sector,
604 * expressed in units of 512 bytes */
607 static inline int fd_eject(int drive)
618 static long unsigned debugtimer;
620 static inline void set_debugt(void)
622 debugtimer = jiffies;
625 static inline void debugt(const char *message)
627 if (DP->flags & DEBUGT)
628 pr_info("%s dtime=%lu\n", message, jiffies - debugtimer);
631 static inline void set_debugt(void) { }
632 static inline void debugt(const char *message) { }
635 typedef void (*timeout_fn) (unsigned long);
636 static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0);
638 static const char *timeout_message;
640 #ifdef FLOPPY_SANITY_CHECK
641 static void is_alive(const char *message)
643 /* this routine checks whether the floppy driver is "alive" */
644 if (test_bit(0, &fdc_busy) && command_status < 2
645 && !timer_pending(&fd_timeout)) {
646 DPRINT("timeout handler died: %s\n", message);
651 static void (*do_floppy)(void) = NULL;
653 #ifdef FLOPPY_SANITY_CHECK
657 static void (*lasthandler)(void);
658 static unsigned long interruptjiffies;
659 static unsigned long resultjiffies;
660 static int resultsize;
661 static unsigned long lastredo;
663 static struct output_log {
665 unsigned char status;
666 unsigned long jiffies;
667 } output_log[OLOGSIZE];
669 static int output_log_pos;
672 #define current_reqD -1
673 #define MAXTIMEOUT -2
675 static void __reschedule_timeout(int drive, const char *message, int marg)
677 if (drive == current_reqD)
678 drive = current_drive;
679 del_timer(&fd_timeout);
680 if (drive < 0 || drive >= N_DRIVE) {
681 fd_timeout.expires = jiffies + 20UL * HZ;
684 fd_timeout.expires = jiffies + UDP->timeout;
685 add_timer(&fd_timeout);
686 if (UDP->flags & FD_DEBUG)
687 DPRINT("reschedule timeout %s %d\n", message, marg);
688 timeout_message = message;
691 static void reschedule_timeout(int drive, const char *message, int marg)
695 spin_lock_irqsave(&floppy_lock, flags);
696 __reschedule_timeout(drive, message, marg);
697 spin_unlock_irqrestore(&floppy_lock, flags);
700 #define INFBOUND(a, b) (a) = max_t(int, a, b)
701 #define SUPBOUND(a, b) (a) = min_t(int, a, b)
704 * Bottom half floppy driver.
705 * ==========================
707 * This part of the file contains the code talking directly to the hardware,
708 * and also the main service loop (seek-configure-spinup-command)
713 * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
714 * and the last_checked date.
716 * last_checked is the date of the last check which showed 'no disk change'
717 * FD_DISK_CHANGE is set under two conditions:
718 * 1. The floppy has been changed after some i/o to that floppy already
720 * 2. No floppy disk is in the drive. This is done in order to ensure that
721 * requests are quickly flushed in case there is no disk in the drive. It
722 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
725 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
726 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
727 * each seek. If a disk is present, the disk change line should also be
728 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
729 * change line is set, this means either that no disk is in the drive, or
730 * that it has been removed since the last seek.
732 * This means that we really have a third possibility too:
733 * The floppy has been changed after the last seek.
736 static int disk_change(int drive)
738 int fdc = FDC(drive);
740 #ifdef FLOPPY_SANITY_CHECK
741 if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
742 DPRINT("WARNING disk change called early\n");
743 if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
744 (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
745 DPRINT("probing disk change on unselected drive\n");
746 DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive),
747 (unsigned int)FDCS->dor);
752 if (UDP->flags & FD_DEBUG) {
753 DPRINT("checking disk change line for drive %d\n", drive);
754 DPRINT("jiffies=%lu\n", jiffies);
755 DPRINT("disk change line=%x\n", fd_inb(FD_DIR) & 0x80);
756 DPRINT("flags=%lx\n", UDRS->flags);
759 if (UDP->flags & FD_BROKEN_DCL)
760 return UTESTF(FD_DISK_CHANGED);
761 if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) {
762 USETF(FD_VERIFY); /* verify write protection */
763 if (UDRS->maxblock) {
764 /* mark it changed */
765 USETF(FD_DISK_CHANGED);
768 /* invalidate its geometry */
769 if (UDRS->keep_data >= 0) {
770 if ((UDP->flags & FTD_MSG) &&
771 current_type[drive] != NULL)
772 DPRINT("Disk type is undefined after "
774 current_type[drive] = NULL;
775 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1;
780 UDRS->last_checked = jiffies;
781 UCLEARF(FD_DISK_NEWCHANGE);
786 static inline int is_selected(int dor, int unit)
788 return ((dor & (0x10 << unit)) && (dor & 3) == unit);
791 static int set_dor(int fdc, char mask, char data)
795 unsigned char newdor;
796 unsigned char olddor;
798 if (FDCS->address == -1)
802 newdor = (olddor & mask) | data;
803 if (newdor != olddor) {
805 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) {
806 drive = REVDRIVE(fdc, unit);
808 if (UDP->flags & FD_DEBUG)
809 DPRINT("calling disk change from set_dor\n");
814 fd_outb(newdor, FD_DOR);
817 if (!is_selected(olddor, unit) && is_selected(newdor, unit)) {
818 drive = REVDRIVE(fdc, unit);
819 UDRS->select_date = jiffies;
825 static void twaddle(void)
827 if (DP->select_delay)
829 fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR);
830 fd_outb(FDCS->dor, FD_DOR);
831 DRS->select_date = jiffies;
834 /* reset all driver information about the current fdc. This is needed after
835 * a reset, and after a raw command. */
836 static void reset_fdc_info(int mode)
840 FDCS->spec1 = FDCS->spec2 = -1;
841 FDCS->need_configure = 1;
844 for (drive = 0; drive < N_DRIVE; drive++)
845 if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL))
846 UDRS->track = NEED_2_RECAL;
849 /* selects the fdc and drive, and enables the fdc's input/dma. */
850 static void set_fdc(int drive)
852 if (drive >= 0 && drive < N_DRIVE) {
854 current_drive = drive;
856 if (fdc != 1 && fdc != 0) {
857 pr_info("bad fdc value\n");
862 set_dor(1 - fdc, ~8, 0);
864 if (FDCS->rawcmd == 2)
866 if (fd_inb(FD_STATUS) != STATUS_READY)
870 /* locks the driver */
871 static int _lock_fdc(int drive, int interruptible, int line)
874 pr_err("Trying to lock fdc while usage count=0 at line %d\n",
879 if (test_and_set_bit(0, &fdc_busy)) {
880 DECLARE_WAITQUEUE(wait, current);
881 add_wait_queue(&fdc_wait, &wait);
884 set_current_state(TASK_INTERRUPTIBLE);
886 if (!test_and_set_bit(0, &fdc_busy))
892 remove_wait_queue(&fdc_wait, &wait);
897 set_current_state(TASK_RUNNING);
898 remove_wait_queue(&fdc_wait, &wait);
899 flush_scheduled_work();
901 command_status = FD_COMMAND_NONE;
903 __reschedule_timeout(drive, "lock fdc", 0);
908 #define lock_fdc(drive, interruptible) \
909 _lock_fdc(drive, interruptible, __LINE__)
911 #define LOCK_FDC(drive, interruptible) \
912 if (lock_fdc(drive, interruptible)) \
915 /* unlocks the driver */
916 static inline void unlock_fdc(void)
921 if (!test_bit(0, &fdc_busy))
922 DPRINT("FDC access conflict!\n");
925 DPRINT("device interrupt still active at FDC release: %p!\n",
927 command_status = FD_COMMAND_NONE;
928 spin_lock_irqsave(&floppy_lock, flags);
929 del_timer(&fd_timeout);
931 clear_bit(0, &fdc_busy);
932 if (current_req || blk_peek_request(floppy_queue))
933 do_fd_request(floppy_queue);
934 spin_unlock_irqrestore(&floppy_lock, flags);
938 /* switches the motor off after a given timeout */
939 static void motor_off_callback(unsigned long nr)
941 unsigned char mask = ~(0x10 << UNIT(nr));
943 set_dor(FDC(nr), mask, 0);
946 /* schedules motor off */
947 static void floppy_off(unsigned int drive)
949 unsigned long volatile delta;
950 int fdc = FDC(drive);
952 if (!(FDCS->dor & (0x10 << UNIT(drive))))
955 del_timer(motor_off_timer + drive);
957 /* make spindle stop in a position which minimizes spinup time
960 delta = jiffies - UDRS->first_read_date + HZ -
961 UDP->spindown_offset;
962 delta = ((delta * UDP->rps) % HZ) / UDP->rps;
963 motor_off_timer[drive].expires =
964 jiffies + UDP->spindown - delta;
966 add_timer(motor_off_timer + drive);
970 * cycle through all N_DRIVE floppy drives, for disk change testing.
971 * stopping at current drive. This is done before any long operation, to
972 * be sure to have up to date disk change information.
974 static void scandrives(void)
980 if (DP->select_delay)
983 saved_drive = current_drive;
984 for (i = 0; i < N_DRIVE; i++) {
985 drive = (saved_drive + i + 1) % N_DRIVE;
986 if (UDRS->fd_ref == 0 || UDP->select_delay != 0)
987 continue; /* skip closed drives */
989 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &
990 (0x10 << UNIT(drive))))
991 /* switch the motor off again, if it was off to
993 set_dor(fdc, ~(0x10 << UNIT(drive)), 0);
995 set_fdc(saved_drive);
998 static void empty(void)
1002 static DECLARE_WORK(floppy_work, NULL);
1004 static void schedule_bh(void (*handler)(void))
1006 PREPARE_WORK(&floppy_work, (work_func_t)handler);
1007 schedule_work(&floppy_work);
1010 static DEFINE_TIMER(fd_timer, NULL, 0, 0);
1012 static void cancel_activity(void)
1014 unsigned long flags;
1016 spin_lock_irqsave(&floppy_lock, flags);
1018 PREPARE_WORK(&floppy_work, (work_func_t)empty);
1019 del_timer(&fd_timer);
1020 spin_unlock_irqrestore(&floppy_lock, flags);
1023 /* this function makes sure that the disk stays in the drive during the
1025 static void fd_watchdog(void)
1028 if (DP->flags & FD_DEBUG)
1029 DPRINT("calling disk change from watchdog\n");
1032 if (disk_change(current_drive)) {
1033 DPRINT("disk removed during i/o\n");
1038 del_timer(&fd_timer);
1039 fd_timer.function = (timeout_fn) fd_watchdog;
1040 fd_timer.expires = jiffies + HZ / 10;
1041 add_timer(&fd_timer);
1045 static void main_command_interrupt(void)
1047 del_timer(&fd_timer);
1051 /* waits for a delay (spinup or select) to pass */
1052 static int fd_wait_for_completion(unsigned long delay, timeout_fn function)
1055 reset_fdc(); /* do the reset during sleep to win time
1056 * if we don't need to sleep, it's a good
1057 * occasion anyways */
1061 if (time_before(jiffies, delay)) {
1062 del_timer(&fd_timer);
1063 fd_timer.function = function;
1064 fd_timer.expires = delay;
1065 add_timer(&fd_timer);
1071 static DEFINE_SPINLOCK(floppy_hlt_lock);
1072 static int hlt_disabled;
1073 static void floppy_disable_hlt(void)
1075 unsigned long flags;
1077 spin_lock_irqsave(&floppy_hlt_lock, flags);
1078 if (!hlt_disabled) {
1080 #ifdef HAVE_DISABLE_HLT
1084 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1087 static void floppy_enable_hlt(void)
1089 unsigned long flags;
1091 spin_lock_irqsave(&floppy_hlt_lock, flags);
1094 #ifdef HAVE_DISABLE_HLT
1098 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1101 static void setup_DMA(void)
1105 #ifdef FLOPPY_SANITY_CHECK
1106 if (raw_cmd->length == 0) {
1109 pr_info("zero dma transfer size:");
1110 for (i = 0; i < raw_cmd->cmd_count; i++)
1111 pr_cont("%x,", raw_cmd->cmd[i]);
1117 if (((unsigned long)raw_cmd->kernel_data) % 512) {
1118 pr_info("non aligned address: %p\n", raw_cmd->kernel_data);
1124 f = claim_dma_lock();
1127 if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length,
1128 (raw_cmd->flags & FD_RAW_READ) ?
1129 DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) {
1130 release_dma_lock(f);
1135 release_dma_lock(f);
1138 fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length);
1139 fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ?
1140 DMA_MODE_READ : DMA_MODE_WRITE);
1141 fd_set_dma_addr(raw_cmd->kernel_data);
1142 fd_set_dma_count(raw_cmd->length);
1143 virtual_dma_port = FDCS->address;
1145 release_dma_lock(f);
1147 floppy_disable_hlt();
1150 static void show_floppy(void);
1152 /* waits until the fdc becomes ready */
1153 static int wait_til_ready(void)
1160 for (counter = 0; counter < 10000; counter++) {
1161 status = fd_inb(FD_STATUS);
1162 if (status & STATUS_READY)
1165 if (!initialising) {
1166 DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc);
1173 /* sends a command byte to the fdc */
1174 static int output_byte(char byte)
1176 int status = wait_til_ready();
1180 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY) {
1181 fd_outb(byte, FD_DATA);
1182 #ifdef FLOPPY_SANITY_CHECK
1183 output_log[output_log_pos].data = byte;
1184 output_log[output_log_pos].status = status;
1185 output_log[output_log_pos].jiffies = jiffies;
1186 output_log_pos = (output_log_pos + 1) % OLOGSIZE;
1191 if (!initialising) {
1192 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
1199 /* gets the response from the fdc */
1200 static int result(void)
1205 for (i = 0; i < MAX_REPLIES; i++) {
1206 status = wait_til_ready();
1209 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA;
1210 if ((status & ~STATUS_BUSY) == STATUS_READY) {
1211 #ifdef FLOPPY_SANITY_CHECK
1212 resultjiffies = jiffies;
1217 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY))
1218 reply_buffer[i] = fd_inb(FD_DATA);
1222 if (!initialising) {
1224 ("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
1232 #define MORE_OUTPUT -2
1233 /* does the fdc need more output? */
1234 static int need_more_output(void)
1236 int status = wait_til_ready();
1240 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY)
1245 /* Set perpendicular mode as required, based on data rate, if supported.
1246 * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1248 static inline void perpendicular_mode(void)
1250 unsigned char perp_mode;
1252 if (raw_cmd->rate & 0x40) {
1253 switch (raw_cmd->rate & 3) {
1261 DPRINT("Invalid data rate for perpendicular mode!\n");
1265 * convenient way to return to
1266 * redo without too much hassle
1267 * (deep stack et al.)
1274 if (FDCS->perp_mode == perp_mode)
1276 if (FDCS->version >= FDC_82077_ORIG) {
1277 output_byte(FD_PERPENDICULAR);
1278 output_byte(perp_mode);
1279 FDCS->perp_mode = perp_mode;
1280 } else if (perp_mode) {
1281 DPRINT("perpendicular mode not supported by this FDC.\n");
1283 } /* perpendicular_mode */
1285 static int fifo_depth = 0xa;
1288 static int fdc_configure(void)
1291 output_byte(FD_CONFIGURE);
1292 if (need_more_output() != MORE_OUTPUT)
1295 output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf));
1296 output_byte(0); /* pre-compensation from track
1301 #define NOMINAL_DTR 500
1303 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1304 * head load time, and DMA disable flag to values needed by floppy.
1306 * The value "dtr" is the data transfer rate in Kbps. It is needed
1307 * to account for the data rate-based scaling done by the 82072 and 82077
1308 * FDC types. This parameter is ignored for other types of FDCs (i.e.
1311 * Note that changing the data transfer rate has a (probably deleterious)
1312 * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1313 * fdc_specify is called again after each data transfer rate
1316 * srt: 1000 to 16000 in microseconds
1317 * hut: 16 to 240 milliseconds
1318 * hlt: 2 to 254 milliseconds
1320 * These values are rounded up to the next highest available delay time.
1322 static void fdc_specify(void)
1324 unsigned char spec1;
1325 unsigned char spec2;
1329 unsigned long dtr = NOMINAL_DTR;
1330 unsigned long scale_dtr = NOMINAL_DTR;
1331 int hlt_max_code = 0x7f;
1332 int hut_max_code = 0xf;
1334 if (FDCS->need_configure && FDCS->version >= FDC_82072A) {
1336 FDCS->need_configure = 0;
1339 switch (raw_cmd->rate & 0x03) {
1345 if (FDCS->version >= FDC_82078) {
1346 /* chose the default rate table, not the one
1347 * where 1 = 2 Mbps */
1348 output_byte(FD_DRIVESPEC);
1349 if (need_more_output() == MORE_OUTPUT) {
1350 output_byte(UNIT(current_drive));
1360 if (FDCS->version >= FDC_82072) {
1362 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1363 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1366 /* Convert step rate from microseconds to milliseconds and 4 bits */
1367 srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR);
1374 hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR);
1377 else if (hlt > 0x7f)
1380 hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR);
1386 spec1 = (srt << 4) | hut;
1387 spec2 = (hlt << 1) | (use_virtual_dma & 1);
1389 /* If these parameters did not change, just return with success */
1390 if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) {
1391 /* Go ahead and set spec1 and spec2 */
1392 output_byte(FD_SPECIFY);
1393 output_byte(FDCS->spec1 = spec1);
1394 output_byte(FDCS->spec2 = spec2);
1398 /* Set the FDC's data transfer rate on behalf of the specified drive.
1399 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1400 * of the specify command (i.e. using the fdc_specify function).
1402 static int fdc_dtr(void)
1404 /* If data rate not already set to desired value, set it. */
1405 if ((raw_cmd->rate & 3) == FDCS->dtr)
1409 fd_outb(raw_cmd->rate & 3, FD_DCR);
1411 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1412 * need a stabilization period of several milliseconds to be
1413 * enforced after data rate changes before R/W operations.
1414 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1416 FDCS->dtr = raw_cmd->rate & 3;
1417 return fd_wait_for_completion(jiffies + 2UL * HZ / 100,
1418 (timeout_fn)floppy_ready);
1421 static void tell_sector(void)
1423 pr_cont(": track %d, head %d, sector %d, size %d",
1424 R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE);
1427 static void print_errors(void)
1430 if (ST0 & ST0_ECE) {
1431 pr_cont("Recalibrate failed!");
1432 } else if (ST2 & ST2_CRC) {
1433 pr_cont("data CRC error");
1435 } else if (ST1 & ST1_CRC) {
1436 pr_cont("CRC error");
1438 } else if ((ST1 & (ST1_MAM | ST1_ND)) ||
1441 pr_cont("sector not found");
1444 pr_cont("probe failed...");
1445 } else if (ST2 & ST2_WC) { /* seek error */
1446 pr_cont("wrong cylinder");
1447 } else if (ST2 & ST2_BC) { /* cylinder marked as bad */
1448 pr_cont("bad cylinder");
1450 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
1458 * OK, this error interpreting routine is called after a
1459 * DMA read/write has succeeded
1460 * or failed, so we check the results, and copy any buffers.
1461 * hhb: Added better error reporting.
1462 * ak: Made this into a separate routine.
1464 static int interpret_errors(void)
1469 DPRINT("-- FDC reply error");
1474 /* check IC to find cause of interrupt */
1475 switch (ST0 & ST0_INTR) {
1476 case 0x40: /* error occurred during command execution */
1478 return 0; /* occurs with pseudo-DMA */
1481 DPRINT("Drive is write protected\n");
1482 CLEARF(FD_DISK_WRITABLE);
1485 } else if (ST1 & ST1_ND) {
1486 SETF(FD_NEED_TWADDLE);
1487 } else if (ST1 & ST1_OR) {
1488 if (DP->flags & FTD_MSG)
1489 DPRINT("Over/Underrun - retrying\n");
1491 } else if (*errors >= DP->max_errors.reporting) {
1494 if (ST2 & ST2_WC || ST2 & ST2_BC)
1495 /* wrong cylinder => recal */
1496 DRS->track = NEED_2_RECAL;
1498 case 0x80: /* invalid command given */
1499 DPRINT("Invalid FDC command given!\n");
1503 DPRINT("Abnormal termination caused by polling\n");
1506 default: /* (0) Normal command termination */
1512 * This routine is called when everything should be correctly set up
1513 * for the transfer (i.e. floppy motor is on, the correct floppy is
1514 * selected, and the head is sitting on the right track).
1516 static void setup_rw_floppy(void)
1522 unsigned long ready_date;
1523 timeout_fn function;
1525 flags = raw_cmd->flags;
1526 if (flags & (FD_RAW_READ | FD_RAW_WRITE))
1527 flags |= FD_RAW_INTR;
1529 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) {
1530 ready_date = DRS->spinup_date + DP->spinup;
1531 /* If spinup will take a long time, rerun scandrives
1532 * again just before spinup completion. Beware that
1533 * after scandrives, we must again wait for selection.
1535 if (time_after(ready_date, jiffies + DP->select_delay)) {
1536 ready_date -= DP->select_delay;
1537 function = (timeout_fn) floppy_start;
1539 function = (timeout_fn) setup_rw_floppy;
1541 /* wait until the floppy is spinning fast enough */
1542 if (fd_wait_for_completion(ready_date, function))
1545 dflags = DRS->flags;
1547 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE))
1550 if (flags & FD_RAW_INTR)
1551 do_floppy = main_command_interrupt;
1554 for (i = 0; i < raw_cmd->cmd_count; i++)
1555 r |= output_byte(raw_cmd->cmd[i]);
1557 debugt("rw_command: ");
1565 if (!(flags & FD_RAW_INTR)) {
1568 } else if (flags & FD_RAW_NEED_DISK)
1572 static int blind_seek;
1575 * This is the routine called after every seek (or recalibrate) interrupt
1576 * from the floppy controller.
1578 static void seek_interrupt(void)
1580 debugt("seek interrupt:");
1581 if (inr != 2 || (ST0 & 0xF8) != 0x20) {
1582 DPRINT("seek failed\n");
1583 DRS->track = NEED_2_RECAL;
1588 if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) {
1590 if (DP->flags & FD_DEBUG) {
1591 DPRINT("clearing NEWCHANGE flag because of effective seek\n");
1592 DPRINT("jiffies=%lu\n", jiffies);
1595 CLEARF(FD_DISK_NEWCHANGE); /* effective seek */
1596 DRS->select_date = jiffies;
1602 static void check_wp(void)
1604 if (TESTF(FD_VERIFY)) {
1605 /* check write protection */
1606 output_byte(FD_GETSTATUS);
1607 output_byte(UNIT(current_drive));
1608 if (result() != 1) {
1613 CLEARF(FD_NEED_TWADDLE);
1615 if (DP->flags & FD_DEBUG) {
1616 DPRINT("checking whether disk is write protected\n");
1617 DPRINT("wp=%x\n", ST3 & 0x40);
1621 SETF(FD_DISK_WRITABLE);
1623 CLEARF(FD_DISK_WRITABLE);
1627 static void seek_floppy(void)
1634 if (DP->flags & FD_DEBUG)
1635 DPRINT("calling disk change from seek\n");
1638 if (!TESTF(FD_DISK_NEWCHANGE) &&
1639 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) {
1640 /* the media changed flag should be cleared after the seek.
1641 * If it isn't, this means that there is really no disk in
1644 SETF(FD_DISK_CHANGED);
1649 if (DRS->track <= NEED_1_RECAL) {
1650 recalibrate_floppy();
1652 } else if (TESTF(FD_DISK_NEWCHANGE) &&
1653 (raw_cmd->flags & FD_RAW_NEED_DISK) &&
1654 (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) {
1655 /* we seek to clear the media-changed condition. Does anybody
1656 * know a more elegant way, which works on all drives? */
1658 track = raw_cmd->track - 1;
1660 if (DP->flags & FD_SILENT_DCL_CLEAR) {
1661 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0);
1663 raw_cmd->flags |= FD_RAW_NEED_SEEK;
1669 if (raw_cmd->track != DRS->track &&
1670 (raw_cmd->flags & FD_RAW_NEED_SEEK))
1671 track = raw_cmd->track;
1678 do_floppy = seek_interrupt;
1679 output_byte(FD_SEEK);
1680 output_byte(UNIT(current_drive));
1681 if (output_byte(track) < 0) {
1685 debugt("seek command:");
1688 static void recal_interrupt(void)
1690 debugt("recal interrupt:");
1693 else if (ST0 & ST0_ECE) {
1694 switch (DRS->track) {
1696 debugt("recal interrupt need 1 recal:");
1697 /* after a second recalibrate, we still haven't
1698 * reached track 0. Probably no drive. Raise an
1699 * error, as failing immediately might upset
1700 * computers possessed by the Devil :-) */
1705 debugt("recal interrupt need 2 recal:");
1706 /* If we already did a recalibrate,
1707 * and we are not at track 0, this
1708 * means we have moved. (The only way
1709 * not to move at recalibration is to
1710 * be already at track 0.) Clear the
1711 * new change flag */
1713 if (DP->flags & FD_DEBUG)
1714 DPRINT("clearing NEWCHANGE flag because of second recalibrate\n");
1717 CLEARF(FD_DISK_NEWCHANGE);
1718 DRS->select_date = jiffies;
1721 debugt("recal interrupt default:");
1722 /* Recalibrate moves the head by at
1723 * most 80 steps. If after one
1724 * recalibrate we don't have reached
1725 * track 0, this might mean that we
1726 * started beyond track 80. Try
1728 DRS->track = NEED_1_RECAL;
1736 static void print_result(char *message, int inr)
1740 DPRINT("%s ", message);
1742 for (i = 0; i < inr; i++)
1743 pr_cont("repl[%d]=%x ", i, reply_buffer[i]);
1747 /* interrupt handler. Note that this can be called externally on the Sparc */
1748 irqreturn_t floppy_interrupt(int irq, void *dev_id)
1752 void (*handler)(void) = do_floppy;
1754 lasthandler = handler;
1755 interruptjiffies = jiffies;
1757 f = claim_dma_lock();
1759 release_dma_lock(f);
1761 floppy_enable_hlt();
1763 if (fdc >= N_FDC || FDCS->address == -1) {
1764 /* we don't even know which FDC is the culprit */
1765 pr_info("DOR0=%x\n", fdc_state[0].dor);
1766 pr_info("floppy interrupt on bizarre fdc %d\n", fdc);
1767 pr_info("handler=%p\n", handler);
1768 is_alive("bizarre fdc");
1773 /* We have to clear the reset flag here, because apparently on boxes
1774 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
1775 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
1776 * emission of the SENSEI's.
1777 * It is OK to emit floppy commands because we are in an interrupt
1778 * handler here, and thus we have to fear no interference of other
1782 do_print = !handler && print_unex && !initialising;
1786 print_result("unexpected interrupt", inr);
1790 output_byte(FD_SENSEI);
1793 print_result("sensei", inr);
1795 } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2
1802 schedule_bh(handler);
1803 is_alive("normal interrupt end");
1805 /* FIXME! Was it really for us? */
1809 static void recalibrate_floppy(void)
1811 debugt("recalibrate floppy:");
1812 do_floppy = recal_interrupt;
1813 output_byte(FD_RECALIBRATE);
1814 if (output_byte(UNIT(current_drive)) < 0) {
1821 * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1823 static void reset_interrupt(void)
1825 debugt("reset interrupt:");
1826 result(); /* get the status ready for set_fdc */
1828 pr_info("reset set in interrupt, calling %p\n", cont->error);
1829 cont->error(); /* a reset just after a reset. BAD! */
1835 * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1836 * or by setting the self clearing bit 7 of STATUS (newer FDCs)
1838 static void reset_fdc(void)
1840 unsigned long flags;
1842 do_floppy = reset_interrupt;
1846 /* Pseudo-DMA may intercept 'reset finished' interrupt. */
1847 /* Irrelevant for systems with true DMA (i386). */
1849 flags = claim_dma_lock();
1851 release_dma_lock(flags);
1853 if (FDCS->version >= FDC_82072A)
1854 fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS);
1856 fd_outb(FDCS->dor & ~0x04, FD_DOR);
1857 udelay(FD_RESET_DELAY);
1858 fd_outb(FDCS->dor, FD_DOR);
1862 static void show_floppy(void)
1867 pr_info("floppy driver state\n");
1868 pr_info("-------------------\n");
1869 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n",
1870 jiffies, interruptjiffies, jiffies - interruptjiffies,
1873 #ifdef FLOPPY_SANITY_CHECK
1874 pr_info("timeout_message=%s\n", timeout_message);
1875 pr_info("last output bytes:\n");
1876 for (i = 0; i < OLOGSIZE; i++)
1877 pr_info("%2x %2x %lu\n",
1878 output_log[(i + output_log_pos) % OLOGSIZE].data,
1879 output_log[(i + output_log_pos) % OLOGSIZE].status,
1880 output_log[(i + output_log_pos) % OLOGSIZE].jiffies);
1881 pr_info("last result at %lu\n", resultjiffies);
1882 pr_info("last redo_fd_request at %lu\n", lastredo);
1883 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1,
1884 reply_buffer, resultsize, true);
1887 pr_info("status=%x\n", fd_inb(FD_STATUS));
1888 pr_info("fdc_busy=%lu\n", fdc_busy);
1890 pr_info("do_floppy=%p\n", do_floppy);
1891 if (work_pending(&floppy_work))
1892 pr_info("floppy_work.func=%p\n", floppy_work.func);
1893 if (timer_pending(&fd_timer))
1894 pr_info("fd_timer.function=%p\n", fd_timer.function);
1895 if (timer_pending(&fd_timeout)) {
1896 pr_info("timer_function=%p\n", fd_timeout.function);
1897 pr_info("expires=%lu\n", fd_timeout.expires - jiffies);
1898 pr_info("now=%lu\n", jiffies);
1900 pr_info("cont=%p\n", cont);
1901 pr_info("current_req=%p\n", current_req);
1902 pr_info("command_status=%d\n", command_status);
1906 static void floppy_shutdown(unsigned long data)
1908 unsigned long flags;
1914 floppy_enable_hlt();
1916 flags = claim_dma_lock();
1918 release_dma_lock(flags);
1920 /* avoid dma going to a random drive after shutdown */
1923 DPRINT("floppy timeout called\n");
1927 cont->redo(); /* this will recall reset when needed */
1929 pr_info("no cont in shutdown!\n");
1930 process_fd_request();
1932 is_alive("floppy shutdown");
1935 /* start motor, check media-changed condition and write protection */
1936 static int start_motor(void (*function)(void))
1942 data = UNIT(current_drive);
1943 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) {
1944 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) {
1946 /* no read since this drive is running */
1947 DRS->first_read_date = 0;
1948 /* note motor start time if motor is not yet running */
1949 DRS->spinup_date = jiffies;
1950 data |= (0x10 << UNIT(current_drive));
1952 } else if (FDCS->dor & (0x10 << UNIT(current_drive)))
1953 mask &= ~(0x10 << UNIT(current_drive));
1955 /* starts motor and selects floppy */
1956 del_timer(motor_off_timer + current_drive);
1957 set_dor(fdc, mask, data);
1959 /* wait_for_completion also schedules reset if needed. */
1960 return fd_wait_for_completion(DRS->select_date + DP->select_delay,
1961 (timeout_fn)function);
1964 static void floppy_ready(void)
1970 if (start_motor(floppy_ready))
1976 if (DP->flags & FD_DEBUG)
1977 DPRINT("calling disk change from floppy_ready\n");
1979 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
1980 disk_change(current_drive) && !DP->select_delay)
1981 twaddle(); /* this clears the dcl on certain
1982 * drive/controller combinations */
1984 #ifdef fd_chose_dma_mode
1985 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) {
1986 unsigned long flags = claim_dma_lock();
1987 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length);
1988 release_dma_lock(flags);
1992 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) {
1993 perpendicular_mode();
1994 fdc_specify(); /* must be done here because of hut, hlt ... */
1997 if ((raw_cmd->flags & FD_RAW_READ) ||
1998 (raw_cmd->flags & FD_RAW_WRITE))
2004 static void floppy_start(void)
2006 reschedule_timeout(current_reqD, "floppy start", 0);
2010 if (DP->flags & FD_DEBUG)
2011 DPRINT("setting NEWCHANGE in floppy_start\n");
2013 SETF(FD_DISK_NEWCHANGE);
2018 * ========================================================================
2019 * here ends the bottom half. Exported routines are:
2020 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
2021 * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
2022 * Initialization also uses output_byte, result, set_dor, floppy_interrupt
2024 * ========================================================================
2027 * General purpose continuations.
2028 * ==============================
2031 static void do_wakeup(void)
2033 reschedule_timeout(MAXTIMEOUT, "do wakeup", 0);
2035 command_status += 2;
2036 wake_up(&command_done);
2039 static struct cont_t wakeup_cont = {
2043 .done = (done_f)empty
2046 static struct cont_t intr_cont = {
2048 .redo = process_fd_request,
2050 .done = (done_f)empty
2053 static int wait_til_done(void (*handler)(void), int interruptible)
2057 schedule_bh(handler);
2059 if (command_status < 2 && NO_SIGNAL) {
2060 DECLARE_WAITQUEUE(wait, current);
2062 add_wait_queue(&command_done, &wait);
2064 set_current_state(interruptible ?
2065 TASK_INTERRUPTIBLE :
2066 TASK_UNINTERRUPTIBLE);
2068 if (command_status >= 2 || !NO_SIGNAL)
2071 is_alive("wait_til_done");
2075 set_current_state(TASK_RUNNING);
2076 remove_wait_queue(&command_done, &wait);
2079 if (command_status < 2) {
2087 command_status = FD_COMMAND_ERROR;
2088 if (command_status == FD_COMMAND_OKAY)
2092 command_status = FD_COMMAND_NONE;
2096 static void generic_done(int result)
2098 command_status = result;
2099 cont = &wakeup_cont;
2102 static void generic_success(void)
2107 static void generic_failure(void)
2112 static void success_and_wakeup(void)
2119 * formatting and rw support.
2120 * ==========================
2123 static int next_valid_format(void)
2127 probed_format = DRS->probed_format;
2129 if (probed_format >= 8 || !DP->autodetect[probed_format]) {
2130 DRS->probed_format = 0;
2133 if (floppy_type[DP->autodetect[probed_format]].sect) {
2134 DRS->probed_format = probed_format;
2141 static void bad_flp_intr(void)
2146 DRS->probed_format++;
2147 if (!next_valid_format())
2150 err_count = ++(*errors);
2151 INFBOUND(DRWE->badness, err_count);
2152 if (err_count > DP->max_errors.abort)
2154 if (err_count > DP->max_errors.reset)
2156 else if (err_count > DP->max_errors.recal)
2157 DRS->track = NEED_2_RECAL;
2160 static void set_floppy(int drive)
2162 int type = ITYPE(UDRS->fd_device);
2165 _floppy = floppy_type + type;
2167 _floppy = current_type[drive];
2171 * formatting support.
2172 * ===================
2174 static void format_interrupt(void)
2176 switch (interpret_errors()) {
2187 #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2)
2188 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1))
2189 #define CT(x) ((x) | 0xc0)
2191 static void setup_format_params(int track)
2199 unsigned char track, head, sect, size;
2200 } *here = (struct fparm *)floppy_track_buffer;
2202 raw_cmd = &default_raw_cmd;
2203 raw_cmd->track = track;
2205 raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
2206 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK);
2207 raw_cmd->rate = _floppy->rate & 0x43;
2208 raw_cmd->cmd_count = NR_F;
2209 COMMAND = FM_MODE(_floppy, FD_FORMAT);
2210 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head);
2211 F_SIZECODE = FD_SIZECODE(_floppy);
2212 F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE;
2213 F_GAP = _floppy->fmt_gap;
2214 F_FILL = FD_FILL_BYTE;
2216 raw_cmd->kernel_data = floppy_track_buffer;
2217 raw_cmd->length = 4 * F_SECT_PER_TRACK;
2219 /* allow for about 30ms for data transport per track */
2220 head_shift = (F_SECT_PER_TRACK + 5) / 6;
2222 /* a ``cylinder'' is two tracks plus a little stepping time */
2223 track_shift = 2 * head_shift + 3;
2225 /* position of logical sector 1 on this track */
2226 n = (track_shift * format_req.track + head_shift * format_req.head)
2229 /* determine interleave */
2231 if (_floppy->fmt_gap < 0x22)
2234 /* initialize field */
2235 for (count = 0; count < F_SECT_PER_TRACK; ++count) {
2236 here[count].track = format_req.track;
2237 here[count].head = format_req.head;
2238 here[count].sect = 0;
2239 here[count].size = F_SIZECODE;
2241 /* place logical sectors */
2242 for (count = 1; count <= F_SECT_PER_TRACK; ++count) {
2243 here[n].sect = count;
2244 n = (n + il) % F_SECT_PER_TRACK;
2245 if (here[n].sect) { /* sector busy, find next free sector */
2247 if (n >= F_SECT_PER_TRACK) {
2248 n -= F_SECT_PER_TRACK;
2249 while (here[n].sect)
2254 if (_floppy->stretch & FD_SECTBASEMASK) {
2255 for (count = 0; count < F_SECT_PER_TRACK; count++)
2256 here[count].sect += FD_SECTBASE(_floppy) - 1;
2260 static void redo_format(void)
2263 setup_format_params(format_req.track << STRETCH(_floppy));
2265 debugt("queue format request");
2268 static struct cont_t format_cont = {
2269 .interrupt = format_interrupt,
2270 .redo = redo_format,
2271 .error = bad_flp_intr,
2272 .done = generic_done
2275 static int do_format(int drive, struct format_descr *tmp_format_req)
2282 _floppy->track > DP->tracks ||
2283 tmp_format_req->track >= _floppy->track ||
2284 tmp_format_req->head >= _floppy->head ||
2285 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
2286 !_floppy->fmt_gap) {
2287 process_fd_request();
2290 format_req = *tmp_format_req;
2292 cont = &format_cont;
2293 errors = &format_errors;
2295 process_fd_request();
2300 * Buffer read/write and support
2301 * =============================
2304 static void floppy_end_request(struct request *req, int error)
2306 unsigned int nr_sectors = current_count_sectors;
2307 unsigned int drive = (unsigned long)req->rq_disk->private_data;
2309 /* current_count_sectors can be zero if transfer failed */
2311 nr_sectors = blk_rq_cur_sectors(req);
2312 if (__blk_end_request(req, error, nr_sectors << 9))
2315 /* We're done with the request */
2320 /* new request_done. Can handle physical sectors which are smaller than a
2322 static void request_done(int uptodate)
2324 struct request_queue *q = floppy_queue;
2325 struct request *req = current_req;
2326 unsigned long flags;
2330 reschedule_timeout(MAXTIMEOUT, "request done", uptodate);
2333 pr_info("floppy.c: no request in request_done\n");
2338 /* maintain values for invalidation on geometry
2340 block = current_count_sectors + blk_rq_pos(req);
2341 INFBOUND(DRS->maxblock, block);
2342 if (block > _floppy->sect)
2345 /* unlock chained buffers */
2346 spin_lock_irqsave(q->queue_lock, flags);
2347 floppy_end_request(req, 0);
2348 spin_unlock_irqrestore(q->queue_lock, flags);
2350 if (rq_data_dir(req) == WRITE) {
2351 /* record write error information */
2352 DRWE->write_errors++;
2353 if (DRWE->write_errors == 1) {
2354 DRWE->first_error_sector = blk_rq_pos(req);
2355 DRWE->first_error_generation = DRS->generation;
2357 DRWE->last_error_sector = blk_rq_pos(req);
2358 DRWE->last_error_generation = DRS->generation;
2360 spin_lock_irqsave(q->queue_lock, flags);
2361 floppy_end_request(req, -EIO);
2362 spin_unlock_irqrestore(q->queue_lock, flags);
2366 /* Interrupt handler evaluating the result of the r/w operation */
2367 static void rw_interrupt(void)
2375 /* some Toshiba floppy controllers occasionnally seem to
2376 * return bogus interrupts after read/write operations, which
2377 * can be recognized by a bad head number (>= 2) */
2381 if (!DRS->first_read_date)
2382 DRS->first_read_date = jiffies;
2397 nr_sectors = (((R_TRACK - TRACK) * heads +
2398 R_HEAD - HEAD) * SECT_PER_TRACK +
2399 R_SECTOR - SECTOR + eoc) << SIZECODE >> 2;
2401 #ifdef FLOPPY_SANITY_CHECK
2402 if (nr_sectors / ssize >
2403 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) {
2404 DPRINT("long rw: %x instead of %lx\n",
2405 nr_sectors, current_count_sectors);
2406 pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR);
2407 pr_info("rh=%d h=%d\n", R_HEAD, HEAD);
2408 pr_info("rt=%d t=%d\n", R_TRACK, TRACK);
2409 pr_info("heads=%d eoc=%d\n", heads, eoc);
2410 pr_info("spt=%d st=%d ss=%d\n",
2411 SECT_PER_TRACK, fsector_t, ssize);
2412 pr_info("in_sector_offset=%d\n", in_sector_offset);
2416 nr_sectors -= in_sector_offset;
2417 INFBOUND(nr_sectors, 0);
2418 SUPBOUND(current_count_sectors, nr_sectors);
2420 switch (interpret_errors()) {
2425 if (!current_count_sectors) {
2432 if (!current_count_sectors) {
2436 current_type[current_drive] = _floppy;
2437 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2442 if (DP->flags & FTD_MSG)
2443 DPRINT("Auto-detected floppy type %s in fd%d\n",
2444 _floppy->name, current_drive);
2445 current_type[current_drive] = _floppy;
2446 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2450 if (CT(COMMAND) != FD_READ ||
2451 raw_cmd->kernel_data == current_req->buffer) {
2452 /* transfer directly from buffer */
2454 } else if (CT(COMMAND) == FD_READ) {
2455 buffer_track = raw_cmd->track;
2456 buffer_drive = current_drive;
2457 INFBOUND(buffer_max, nr_sectors + fsector_t);
2462 /* Compute maximal contiguous buffer size. */
2463 static int buffer_chain_size(void)
2467 struct req_iterator iter;
2470 base = bio_data(current_req->bio);
2473 rq_for_each_segment(bv, current_req, iter) {
2474 if (page_address(bv->bv_page) + bv->bv_offset != base + size)
2483 /* Compute the maximal transfer size */
2484 static int transfer_size(int ssize, int max_sector, int max_size)
2486 SUPBOUND(max_sector, fsector_t + max_size);
2489 max_sector -= (max_sector % _floppy->sect) % ssize;
2491 /* transfer size, beginning not aligned */
2492 current_count_sectors = max_sector - fsector_t;
2498 * Move data from/to the track buffer to/from the buffer cache.
2500 static void copy_buffer(int ssize, int max_sector, int max_sector_2)
2502 int remaining; /* number of transferred 512-byte sectors */
2507 struct req_iterator iter;
2509 max_sector = transfer_size(ssize,
2510 min(max_sector, max_sector_2),
2511 blk_rq_sectors(current_req));
2513 if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
2514 buffer_max > fsector_t + blk_rq_sectors(current_req))
2515 current_count_sectors = min_t(int, buffer_max - fsector_t,
2516 blk_rq_sectors(current_req));
2518 remaining = current_count_sectors << 9;
2519 #ifdef FLOPPY_SANITY_CHECK
2520 if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) {
2521 DPRINT("in copy buffer\n");
2522 pr_info("current_count_sectors=%ld\n", current_count_sectors);
2523 pr_info("remaining=%d\n", remaining >> 9);
2524 pr_info("current_req->nr_sectors=%u\n",
2525 blk_rq_sectors(current_req));
2526 pr_info("current_req->current_nr_sectors=%u\n",
2527 blk_rq_cur_sectors(current_req));
2528 pr_info("max_sector=%d\n", max_sector);
2529 pr_info("ssize=%d\n", ssize);
2533 buffer_max = max(max_sector, buffer_max);
2535 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
2537 size = blk_rq_cur_bytes(current_req);
2539 rq_for_each_segment(bv, current_req, iter) {
2544 SUPBOUND(size, remaining);
2546 buffer = page_address(bv->bv_page) + bv->bv_offset;
2547 #ifdef FLOPPY_SANITY_CHECK
2548 if (dma_buffer + size >
2549 floppy_track_buffer + (max_buffer_sectors << 10) ||
2550 dma_buffer < floppy_track_buffer) {
2551 DPRINT("buffer overrun in copy buffer %d\n",
2552 (int)((floppy_track_buffer - dma_buffer) >> 9));
2553 pr_info("fsector_t=%d buffer_min=%d\n",
2554 fsector_t, buffer_min);
2555 pr_info("current_count_sectors=%ld\n",
2556 current_count_sectors);
2557 if (CT(COMMAND) == FD_READ)
2559 if (CT(COMMAND) == FD_WRITE)
2563 if (((unsigned long)buffer) % 512)
2564 DPRINT("%p buffer not aligned\n", buffer);
2566 if (CT(COMMAND) == FD_READ)
2567 memcpy(buffer, dma_buffer, size);
2569 memcpy(dma_buffer, buffer, size);
2574 #ifdef FLOPPY_SANITY_CHECK
2577 max_sector -= remaining >> 9;
2578 DPRINT("weirdness: remaining %d\n", remaining >> 9);
2583 /* work around a bug in pseudo DMA
2584 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2585 * sending data. Hence we need a different way to signal the
2586 * transfer length: We use SECT_PER_TRACK. Unfortunately, this
2587 * does not work with MT, hence we can only transfer one head at
2590 static void virtualdmabug_workaround(void)
2595 if (CT(COMMAND) == FD_WRITE) {
2596 COMMAND &= ~0x80; /* switch off multiple track mode */
2598 hard_sectors = raw_cmd->length >> (7 + SIZECODE);
2599 end_sector = SECTOR + hard_sectors - 1;
2600 #ifdef FLOPPY_SANITY_CHECK
2601 if (end_sector > SECT_PER_TRACK) {
2602 pr_info("too many sectors %d > %d\n",
2603 end_sector, SECT_PER_TRACK);
2607 SECT_PER_TRACK = end_sector;
2608 /* make sure SECT_PER_TRACK
2609 * points to end of transfer */
2614 * Formulate a read/write request.
2615 * this routine decides where to load the data (directly to buffer, or to
2616 * tmp floppy area), how much data to load (the size of the buffer, the whole
2617 * track, or a single sector)
2618 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2619 * allocation on the fly, it should be done here. No other part should need
2623 static int make_raw_rw_request(void)
2625 int aligned_sector_t;
2631 if (max_buffer_sectors == 0) {
2632 pr_info("VFS: Block I/O scheduled on unopened device\n");
2636 set_fdc((long)current_req->rq_disk->private_data);
2638 raw_cmd = &default_raw_cmd;
2639 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK |
2641 raw_cmd->cmd_count = NR_RW;
2642 if (rq_data_dir(current_req) == READ) {
2643 raw_cmd->flags |= FD_RAW_READ;
2644 COMMAND = FM_MODE(_floppy, FD_READ);
2645 } else if (rq_data_dir(current_req) == WRITE) {
2646 raw_cmd->flags |= FD_RAW_WRITE;
2647 COMMAND = FM_MODE(_floppy, FD_WRITE);
2649 DPRINT("make_raw_rw_request: unknown command\n");
2653 max_sector = _floppy->sect * _floppy->head;
2655 TRACK = (int)blk_rq_pos(current_req) / max_sector;
2656 fsector_t = (int)blk_rq_pos(current_req) % max_sector;
2657 if (_floppy->track && TRACK >= _floppy->track) {
2658 if (blk_rq_cur_sectors(current_req) & 1) {
2659 current_count_sectors = 1;
2664 HEAD = fsector_t / _floppy->sect;
2666 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) ||
2667 TESTF(FD_NEED_TWADDLE)) && fsector_t < _floppy->sect)
2668 max_sector = _floppy->sect;
2670 /* 2M disks have phantom sectors on the first track */
2671 if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) {
2672 max_sector = 2 * _floppy->sect / 3;
2673 if (fsector_t >= max_sector) {
2674 current_count_sectors =
2675 min_t(int, _floppy->sect - fsector_t,
2676 blk_rq_sectors(current_req));
2681 SIZECODE = FD_SIZECODE(_floppy);
2682 raw_cmd->rate = _floppy->rate & 0x43;
2683 if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2)
2690 raw_cmd->track = TRACK << STRETCH(_floppy);
2691 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD);
2694 SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
2695 SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) +
2696 FD_SECTBASE(_floppy);
2698 /* tracksize describes the size which can be filled up with sectors
2701 tracksize = _floppy->sect - _floppy->sect % ssize;
2702 if (tracksize < _floppy->sect) {
2704 if (tracksize <= fsector_t % _floppy->sect)
2707 /* if we are beyond tracksize, fill up using smaller sectors */
2708 while (tracksize <= fsector_t % _floppy->sect) {
2709 while (tracksize + ssize > _floppy->sect) {
2717 max_sector = HEAD * _floppy->sect + tracksize;
2718 } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) {
2719 max_sector = _floppy->sect;
2720 } else if (!HEAD && CT(COMMAND) == FD_WRITE) {
2721 /* for virtual DMA bug workaround */
2722 max_sector = _floppy->sect;
2725 in_sector_offset = (fsector_t % _floppy->sect) % ssize;
2726 aligned_sector_t = fsector_t - in_sector_offset;
2727 max_size = blk_rq_sectors(current_req);
2728 if ((raw_cmd->track == buffer_track) &&
2729 (current_drive == buffer_drive) &&
2730 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
2731 /* data already in track buffer */
2732 if (CT(COMMAND) == FD_READ) {
2733 copy_buffer(1, max_sector, buffer_max);
2736 } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) {
2737 if (CT(COMMAND) == FD_WRITE) {
2738 unsigned int sectors;
2740 sectors = fsector_t + blk_rq_sectors(current_req);
2741 if (sectors > ssize && sectors < ssize + ssize)
2742 max_size = ssize + ssize;
2746 raw_cmd->flags &= ~FD_RAW_WRITE;
2747 raw_cmd->flags |= FD_RAW_READ;
2748 COMMAND = FM_MODE(_floppy, FD_READ);
2749 } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) {
2750 unsigned long dma_limit;
2751 int direct, indirect;
2754 transfer_size(ssize, max_sector,
2755 max_buffer_sectors * 2) - fsector_t;
2758 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2759 * on a 64 bit machine!
2761 max_size = buffer_chain_size();
2762 dma_limit = (MAX_DMA_ADDRESS -
2763 ((unsigned long)current_req->buffer)) >> 9;
2764 if ((unsigned long)max_size > dma_limit)
2765 max_size = dma_limit;
2766 /* 64 kb boundaries */
2767 if (CROSS_64KB(current_req->buffer, max_size << 9))
2769 ((unsigned long)current_req->buffer) %
2771 direct = transfer_size(ssize, max_sector, max_size) - fsector_t;
2773 * We try to read tracks, but if we get too many errors, we
2774 * go back to reading just one sector at a time.
2776 * This means we should be able to read a sector even if there
2777 * are other bad sectors on this track.
2780 (indirect * 2 > direct * 3 &&
2781 *errors < DP->max_errors.read_track &&
2783 (DP->read_track & (1 << DRS->probed_format)))))) {
2784 max_size = blk_rq_sectors(current_req);
2786 raw_cmd->kernel_data = current_req->buffer;
2787 raw_cmd->length = current_count_sectors << 9;
2788 if (raw_cmd->length == 0) {
2789 DPRINT("zero dma transfer attempted from make_raw_request\n");
2790 DPRINT("indirect=%d direct=%d fsector_t=%d\n",
2791 indirect, direct, fsector_t);
2794 virtualdmabug_workaround();
2799 if (CT(COMMAND) == FD_READ)
2800 max_size = max_sector; /* unbounded */
2802 /* claim buffer track if needed */
2803 if (buffer_track != raw_cmd->track || /* bad track */
2804 buffer_drive != current_drive || /* bad drive */
2805 fsector_t > buffer_max ||
2806 fsector_t < buffer_min ||
2807 ((CT(COMMAND) == FD_READ ||
2808 (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) &&
2809 max_sector > 2 * max_buffer_sectors + buffer_min &&
2810 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) {
2811 /* not enough space */
2813 buffer_drive = current_drive;
2814 buffer_max = buffer_min = aligned_sector_t;
2816 raw_cmd->kernel_data = floppy_track_buffer +
2817 ((aligned_sector_t - buffer_min) << 9);
2819 if (CT(COMMAND) == FD_WRITE) {
2820 /* copy write buffer to track buffer.
2821 * if we get here, we know that the write
2822 * is either aligned or the data already in the buffer
2823 * (buffer will be overwritten) */
2824 #ifdef FLOPPY_SANITY_CHECK
2825 if (in_sector_offset && buffer_track == -1)
2826 DPRINT("internal error offset !=0 on write\n");
2828 buffer_track = raw_cmd->track;
2829 buffer_drive = current_drive;
2830 copy_buffer(ssize, max_sector,
2831 2 * max_buffer_sectors + buffer_min);
2833 transfer_size(ssize, max_sector,
2834 2 * max_buffer_sectors + buffer_min -
2837 /* round up current_count_sectors to get dma xfer size */
2838 raw_cmd->length = in_sector_offset + current_count_sectors;
2839 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1;
2840 raw_cmd->length <<= 9;
2841 #ifdef FLOPPY_SANITY_CHECK
2842 if ((raw_cmd->length < current_count_sectors << 9) ||
2843 (raw_cmd->kernel_data != current_req->buffer &&
2844 CT(COMMAND) == FD_WRITE &&
2845 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
2846 aligned_sector_t < buffer_min)) ||
2847 raw_cmd->length % (128 << SIZECODE) ||
2848 raw_cmd->length <= 0 || current_count_sectors <= 0) {
2849 DPRINT("fractionary current count b=%lx s=%lx\n",
2850 raw_cmd->length, current_count_sectors);
2851 if (raw_cmd->kernel_data != current_req->buffer)
2852 pr_info("addr=%d, length=%ld\n",
2853 (int)((raw_cmd->kernel_data -
2854 floppy_track_buffer) >> 9),
2855 current_count_sectors);
2856 pr_info("st=%d ast=%d mse=%d msi=%d\n",
2857 fsector_t, aligned_sector_t, max_sector, max_size);
2858 pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE);
2859 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2860 COMMAND, SECTOR, HEAD, TRACK);
2861 pr_info("buffer drive=%d\n", buffer_drive);
2862 pr_info("buffer track=%d\n", buffer_track);
2863 pr_info("buffer_min=%d\n", buffer_min);
2864 pr_info("buffer_max=%d\n", buffer_max);
2868 if (raw_cmd->kernel_data != current_req->buffer) {
2869 if (raw_cmd->kernel_data < floppy_track_buffer ||
2870 current_count_sectors < 0 ||
2871 raw_cmd->length < 0 ||
2872 raw_cmd->kernel_data + raw_cmd->length >
2873 floppy_track_buffer + (max_buffer_sectors << 10)) {
2874 DPRINT("buffer overrun in schedule dma\n");
2875 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n",
2876 fsector_t, buffer_min, raw_cmd->length >> 9);
2877 pr_info("current_count_sectors=%ld\n",
2878 current_count_sectors);
2879 if (CT(COMMAND) == FD_READ)
2881 if (CT(COMMAND) == FD_WRITE)
2885 } else if (raw_cmd->length > blk_rq_bytes(current_req) ||
2886 current_count_sectors > blk_rq_sectors(current_req)) {
2887 DPRINT("buffer overrun in direct transfer\n");
2889 } else if (raw_cmd->length < current_count_sectors << 9) {
2890 DPRINT("more sectors than bytes\n");
2891 pr_info("bytes=%ld\n", raw_cmd->length >> 9);
2892 pr_info("sectors=%ld\n", current_count_sectors);
2894 if (raw_cmd->length == 0) {
2895 DPRINT("zero dma transfer attempted from make_raw_request\n");
2900 virtualdmabug_workaround();
2904 static void redo_fd_request(void)
2906 #define REPEAT {request_done(0); continue; }
2911 if (current_drive < N_DRIVE)
2912 floppy_off(current_drive);
2916 struct request *req;
2918 spin_lock_irq(floppy_queue->queue_lock);
2919 req = blk_fetch_request(floppy_queue);
2920 spin_unlock_irq(floppy_queue->queue_lock);
2928 drive = (long)current_req->rq_disk->private_data;
2930 reschedule_timeout(current_reqD, "redo fd request", 0);
2933 raw_cmd = &default_raw_cmd;
2935 if (start_motor(redo_fd_request))
2937 disk_change(current_drive);
2938 if (test_bit(current_drive, &fake_change) ||
2939 TESTF(FD_DISK_CHANGED)) {
2940 DPRINT("disk absent or changed during operation\n");
2943 if (!_floppy) { /* Autodetection */
2945 DRS->probed_format = 0;
2946 if (next_valid_format()) {
2947 DPRINT("no autodetectable formats\n");
2954 floppy_type + DP->autodetect[DRS->probed_format];
2957 errors = &(current_req->errors);
2958 tmp = make_raw_rw_request();
2964 if (TESTF(FD_NEED_TWADDLE))
2966 schedule_bh(floppy_start);
2967 debugt("queue fd request");
2973 static struct cont_t rw_cont = {
2974 .interrupt = rw_interrupt,
2975 .redo = redo_fd_request,
2976 .error = bad_flp_intr,
2977 .done = request_done
2980 static void process_fd_request(void)
2983 schedule_bh(redo_fd_request);
2986 static void do_fd_request(struct request_queue *q)
2988 if (max_buffer_sectors == 0) {
2989 pr_info("VFS: do_fd_request called on non-open device\n");
2993 if (usage_count == 0) {
2994 pr_info("warning: usage count=0, current_req=%p exiting\n",
2996 pr_info("sect=%ld type=%x flags=%x\n",
2997 (long)blk_rq_pos(current_req), current_req->cmd_type,
2998 current_req->cmd_flags);
3001 if (test_bit(0, &fdc_busy)) {
3002 /* fdc busy, this new request will be treated when the
3003 current one is done */
3004 is_alive("do fd request, old request running");
3007 lock_fdc(MAXTIMEOUT, 0);
3008 process_fd_request();
3009 is_alive("do fd request");
3012 static struct cont_t poll_cont = {
3013 .interrupt = success_and_wakeup,
3014 .redo = floppy_ready,
3015 .error = generic_failure,
3016 .done = generic_done
3019 static int poll_drive(int interruptible, int flag)
3023 /* no auto-sense, just clear dcl */
3024 raw_cmd = &default_raw_cmd;
3025 raw_cmd->flags = flag;
3027 raw_cmd->cmd_count = 0;
3030 if (DP->flags & FD_DEBUG)
3031 DPRINT("setting NEWCHANGE in poll_drive\n");
3033 SETF(FD_DISK_NEWCHANGE);
3039 * User triggered reset
3040 * ====================
3043 static void reset_intr(void)
3045 pr_info("weird, reset interrupt called\n");
3048 static struct cont_t reset_cont = {
3049 .interrupt = reset_intr,
3050 .redo = success_and_wakeup,
3051 .error = generic_failure,
3052 .done = generic_done
3055 static int user_reset_fdc(int drive, int arg, int interruptible)
3060 LOCK_FDC(drive, interruptible);
3061 if (arg == FD_RESET_ALWAYS)
3067 process_fd_request();
3072 * Misc Ioctl's and support
3073 * ========================
3075 static inline int fd_copyout(void __user *param, const void *address,
3078 return copy_to_user(param, address, size) ? -EFAULT : 0;
3081 static inline int fd_copyin(void __user *param, void *address,
3084 return copy_from_user(address, param, size) ? -EFAULT : 0;
3087 #define _COPYOUT(x) (copy_to_user((void __user *)param, &(x), sizeof(x)) \
3089 #define _COPYIN(x) (copy_from_user(&(x), (void __user *)param, sizeof(x)) \
3092 #define COPYOUT(x) ECALL(_COPYOUT(x))
3093 #define COPYIN(x) ECALL(_COPYIN(x))
3095 static inline const char *drive_name(int type, int drive)
3097 struct floppy_struct *floppy;
3100 floppy = floppy_type + type;
3102 if (UDP->native_format)
3103 floppy = floppy_type + UDP->native_format;
3108 return floppy->name;
3114 static void raw_cmd_done(int flag)
3119 raw_cmd->flags |= FD_RAW_FAILURE;
3120 raw_cmd->flags |= FD_RAW_HARDFAILURE;
3122 raw_cmd->reply_count = inr;
3123 if (raw_cmd->reply_count > MAX_REPLIES)
3124 raw_cmd->reply_count = 0;
3125 for (i = 0; i < raw_cmd->reply_count; i++)
3126 raw_cmd->reply[i] = reply_buffer[i];
3128 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3129 unsigned long flags;
3130 flags = claim_dma_lock();
3131 raw_cmd->length = fd_get_dma_residue();
3132 release_dma_lock(flags);
3135 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
3136 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
3137 raw_cmd->flags |= FD_RAW_FAILURE;
3139 if (disk_change(current_drive))
3140 raw_cmd->flags |= FD_RAW_DISK_CHANGE;
3142 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
3143 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
3144 motor_off_callback(current_drive);
3146 if (raw_cmd->next &&
3147 (!(raw_cmd->flags & FD_RAW_FAILURE) ||
3148 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
3149 ((raw_cmd->flags & FD_RAW_FAILURE) ||
3150 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) {
3151 raw_cmd = raw_cmd->next;
3158 static struct cont_t raw_cmd_cont = {
3159 .interrupt = success_and_wakeup,
3160 .redo = floppy_start,
3161 .error = generic_failure,
3162 .done = raw_cmd_done
3165 static inline int raw_cmd_copyout(int cmd, char __user *param,
3166 struct floppy_raw_cmd *ptr)
3172 param += sizeof(struct floppy_raw_cmd);
3173 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) {
3174 if (ptr->length >= 0 &&
3175 ptr->length <= ptr->buffer_length) {
3176 long length = ptr->buffer_length - ptr->length;
3177 ECALL(fd_copyout(ptr->data, ptr->kernel_data,
3186 static void raw_cmd_free(struct floppy_raw_cmd **ptr)
3188 struct floppy_raw_cmd *next;
3189 struct floppy_raw_cmd *this;
3194 if (this->buffer_length) {
3195 fd_dma_mem_free((unsigned long)this->kernel_data,
3196 this->buffer_length);
3197 this->buffer_length = 0;
3205 static inline int raw_cmd_copyin(int cmd, char __user *param,
3206 struct floppy_raw_cmd **rcmd)
3208 struct floppy_raw_cmd *ptr;
3214 ptr = (struct floppy_raw_cmd *)
3215 kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
3221 ptr->buffer_length = 0;
3222 param += sizeof(struct floppy_raw_cmd);
3223 if (ptr->cmd_count > 33)
3224 /* the command may now also take up the space
3225 * initially intended for the reply & the
3226 * reply count. Needed for long 82078 commands
3227 * such as RESTORE, which takes ... 17 command
3228 * bytes. Murphy's law #137: When you reserve
3229 * 16 bytes for a structure, you'll one day
3230 * discover that you really need 17...
3234 for (i = 0; i < 16; i++)
3236 ptr->resultcode = 0;
3237 ptr->kernel_data = NULL;
3239 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3240 if (ptr->length <= 0)
3243 (char *)fd_dma_mem_alloc(ptr->length);
3244 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
3245 if (!ptr->kernel_data)
3247 ptr->buffer_length = ptr->length;
3249 if (ptr->flags & FD_RAW_WRITE)
3250 ECALL(fd_copyin(ptr->data, ptr->kernel_data,
3252 rcmd = &(ptr->next);
3253 if (!(ptr->flags & FD_RAW_MORE))
3259 static int raw_cmd_ioctl(int cmd, void __user *param)
3261 struct floppy_raw_cmd *my_raw_cmd;
3266 if (FDCS->rawcmd <= 1)
3268 for (drive = 0; drive < N_DRIVE; drive++) {
3269 if (FDC(drive) != fdc)
3271 if (drive == current_drive) {
3272 if (UDRS->fd_ref > 1) {
3276 } else if (UDRS->fd_ref) {
3285 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
3287 raw_cmd_free(&my_raw_cmd);
3291 raw_cmd = my_raw_cmd;
3292 cont = &raw_cmd_cont;
3293 ret = wait_til_done(floppy_start, 1);
3295 if (DP->flags & FD_DEBUG)
3296 DPRINT("calling disk change from raw_cmd ioctl\n");
3299 if (ret != -EINTR && FDCS->reset)
3302 DRS->track = NO_TRACK;
3304 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
3307 raw_cmd_free(&my_raw_cmd);
3311 static int invalidate_drive(struct block_device *bdev)
3313 /* invalidate the buffer track to force a reread */
3314 set_bit((long)bdev->bd_disk->private_data, &fake_change);
3315 process_fd_request();
3316 check_disk_change(bdev);
3320 static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
3321 int drive, int type, struct block_device *bdev)
3325 /* sanity checking for parameters. */
3328 g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) ||
3329 /* check if reserved bits are set */
3330 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0)
3333 if (!capable(CAP_SYS_ADMIN))
3335 mutex_lock(&open_lock);
3336 if (lock_fdc(drive, 1)) {
3337 mutex_unlock(&open_lock);
3340 floppy_type[type] = *g;
3341 floppy_type[type].name = "user format";
3342 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
3343 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] =
3344 floppy_type[type].size + 1;
3345 process_fd_request();
3346 for (cnt = 0; cnt < N_DRIVE; cnt++) {
3347 struct block_device *bdev = opened_bdev[cnt];
3348 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
3350 __invalidate_device(bdev);
3352 mutex_unlock(&open_lock);
3356 if (cmd != FDDEFPRM)
3357 /* notice a disk change immediately, else
3358 * we lose our settings immediately*/
3359 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3360 oldStretch = g->stretch;
3361 user_params[drive] = *g;
3362 if (buffer_drive == drive)
3363 SUPBOUND(buffer_max, user_params[drive].sect);
3364 current_type[drive] = &user_params[drive];
3365 floppy_sizes[drive] = user_params[drive].size;
3366 if (cmd == FDDEFPRM)
3367 DRS->keep_data = -1;
3370 /* invalidation. Invalidate only when needed, i.e.
3371 * when there are already sectors in the buffer cache
3372 * whose number will change. This is useful, because
3373 * mtools often changes the geometry of the disk after
3374 * looking at the boot block */
3375 if (DRS->maxblock > user_params[drive].sect ||
3377 ((user_params[drive].sect ^ oldStretch) &
3378 (FD_SWAPSIDES | FD_SECTBASEMASK)))
3379 invalidate_drive(bdev);
3381 process_fd_request();
3386 /* handle obsolete ioctl's */
3387 static int ioctl_table[] = {
3415 static inline int normalize_ioctl(int *cmd, int *size)
3419 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) {
3420 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) {
3421 *size = _IOC_SIZE(*cmd);
3422 *cmd = ioctl_table[i];
3423 if (*size > _IOC_SIZE(*cmd)) {
3424 pr_info("ioctl not yet supported\n");
3433 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
3436 *g = &floppy_type[type];
3439 CALL(poll_drive(0, 0));
3440 process_fd_request();
3441 *g = current_type[drive];
3448 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
3450 int drive = (long)bdev->bd_disk->private_data;
3451 int type = ITYPE(drive_state[drive].fd_device);
3452 struct floppy_struct *g;
3455 ret = get_floppy_geometry(drive, type, &g);
3459 geo->heads = g->head;
3460 geo->sectors = g->sect;
3461 geo->cylinders = g->track;
3465 static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3466 unsigned long param)
3468 #define FD_IOCTL_ALLOWED (mode & (FMODE_WRITE|FMODE_WRITE_IOCTL))
3469 #define OUT(c,x) case c: outparam = (const char *) (x); break
3470 #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0
3472 int drive = (long)bdev->bd_disk->private_data;
3473 int type = ITYPE(UDRS->fd_device);
3478 struct floppy_struct g; /* geometry */
3479 struct format_descr f;
3480 struct floppy_max_errors max_errors;
3481 struct floppy_drive_params dp;
3482 } inparam; /* parameters coming from user space */
3483 const char *outparam; /* parameters passed back to user space */
3485 /* convert compatibility eject ioctls into floppy eject ioctl.
3486 * We do this in order to provide a means to eject floppy disks before
3487 * installing the new fdutils package */
3488 if (cmd == CDROMEJECT || /* CD-ROM eject */
3489 cmd == 0x6470) { /* SunOS floppy eject */
3490 DPRINT("obsolete eject ioctl\n");
3491 DPRINT("please use floppycontrol --eject\n");
3495 if (!((cmd & 0xff00) == 0x0200))
3498 /* convert the old style command into a new style command */
3499 ECALL(normalize_ioctl(&cmd, &size));
3501 /* permission checks */
3502 if (((cmd & 0x40) && !FD_IOCTL_ALLOWED) ||
3503 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
3506 if (WARN_ON(size < 0 || size > sizeof(inparam)))
3510 memset(&inparam, 0, sizeof(inparam));
3511 if (_IOC_DIR(cmd) & _IOC_WRITE)
3512 ECALL(fd_copyin((void __user *)param, &inparam, size))
3516 if (UDRS->fd_ref != 1)
3517 /* somebody else has this drive open */
3521 /* do the actual eject. Fails on
3522 * non-Sparc architectures */
3523 ret = fd_eject(UNIT(drive));
3525 USETF(FD_DISK_CHANGED);
3527 process_fd_request();
3531 current_type[drive] = NULL;
3532 floppy_sizes[drive] = MAX_DISK_SIZE << 1;
3533 UDRS->keep_data = 0;
3534 return invalidate_drive(bdev);
3537 return set_geometry(cmd, &inparam.g,
3540 ECALL(get_floppy_geometry(drive, type,
3541 (struct floppy_struct **)
3546 UDP->flags |= FTD_MSG;
3549 UDP->flags &= ~FTD_MSG;
3554 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3556 process_fd_request();
3557 if (ret & FD_VERIFY)
3559 if (!(ret & FD_DISK_WRITABLE))
3563 if (UDRS->fd_ref != 1)
3565 return do_format(drive, &inparam.f);
3569 return invalidate_drive(bdev);
3571 case FDSETEMSGTRESH:
3572 UDP->max_errors.reporting =
3573 (unsigned short)(param & 0x0f);
3575 OUT(FDGETMAXERRS, &UDP->max_errors);
3576 IN(FDSETMAXERRS, &UDP->max_errors, max_errors);
3579 outparam = drive_name(type, drive);
3580 SUPBOUND(size, strlen(outparam) + 1);
3583 IN(FDSETDRVPRM, UDP, dp);
3584 OUT(FDGETDRVPRM, UDP);
3588 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3589 process_fd_request();
3591 OUT(FDGETDRVSTAT, UDRS);
3594 return user_reset_fdc(drive, (int)param, 1);
3596 OUT(FDGETFDCSTAT, UFDCS);
3599 memset(UDRWE, 0, sizeof(*UDRWE));
3601 OUT(FDWERRORGET, UDRWE);
3608 CALL(i = raw_cmd_ioctl(cmd, (void __user *)param));
3609 process_fd_request();
3615 process_fd_request();
3622 if (_IOC_DIR(cmd) & _IOC_READ)
3623 return fd_copyout((void __user *)param, outparam, size);
3630 static void __init config_types(void)
3632 bool has_drive = false;
3635 /* read drive info out of physical CMOS */
3638 UDP->cmos = FLOPPY0_TYPE;
3640 if (!UDP->cmos && FLOPPY1_TYPE)
3641 UDP->cmos = FLOPPY1_TYPE;
3643 /* FIXME: additional physical CMOS drive detection should go here */
3645 for (drive = 0; drive < N_DRIVE; drive++) {
3646 unsigned int type = UDP->cmos;
3647 struct floppy_drive_params *params;
3648 const char *name = NULL;
3649 static char temparea[32];
3651 if (type < ARRAY_SIZE(default_drive_params)) {
3652 params = &default_drive_params[type].params;
3654 name = default_drive_params[type].name;
3655 allowed_drive_mask |= 1 << drive;
3657 allowed_drive_mask &= ~(1 << drive);
3659 params = &default_drive_params[0].params;
3660 sprintf(temparea, "unknown type %d (usb?)", type);
3664 const char *prepend;
3668 pr_info("Floppy drive(s):");
3673 pr_cont("%s fd%d is %s", prepend, drive, name);
3682 static int floppy_release(struct gendisk *disk, fmode_t mode)
3684 int drive = (long)disk->private_data;
3686 mutex_lock(&open_lock);
3687 if (UDRS->fd_ref < 0)
3689 else if (!UDRS->fd_ref--) {
3690 DPRINT("floppy_release with fd_ref == 0");
3694 opened_bdev[drive] = NULL;
3695 mutex_unlock(&open_lock);
3701 * floppy_open check for aliasing (/dev/fd0 can be the same as
3702 * /dev/PS0 etc), and disallows simultaneous access to the same
3703 * drive with different device numbers.
3705 static int floppy_open(struct block_device *bdev, fmode_t mode)
3707 int drive = (long)bdev->bd_disk->private_data;
3708 int old_dev, new_dev;
3713 mutex_lock(&open_lock);
3714 old_dev = UDRS->fd_device;
3715 if (opened_bdev[drive] && opened_bdev[drive] != bdev)
3718 if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) {
3719 USETF(FD_DISK_CHANGED);
3723 if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL)))
3726 if (mode & FMODE_EXCL)
3731 opened_bdev[drive] = bdev;
3735 if (!floppy_track_buffer) {
3736 /* if opening an ED drive, reserve a big buffer,
3737 * else reserve a small one */
3738 if ((UDP->cmos == 6) || (UDP->cmos == 5))
3739 try = 64; /* Only 48 actually useful */
3741 try = 32; /* Only 24 actually useful */
3743 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3744 if (!tmp && !floppy_track_buffer) {
3745 try >>= 1; /* buffer only one side */
3747 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3749 if (!tmp && !floppy_track_buffer)
3750 fallback_on_nodma_alloc(&tmp, 2048 * try);
3751 if (!tmp && !floppy_track_buffer) {
3752 DPRINT("Unable to allocate DMA memory\n");
3755 if (floppy_track_buffer) {
3757 fd_dma_mem_free((unsigned long)tmp, try * 1024);
3759 buffer_min = buffer_max = -1;
3760 floppy_track_buffer = tmp;
3761 max_buffer_sectors = try;
3765 new_dev = MINOR(bdev->bd_dev);
3766 UDRS->fd_device = new_dev;
3767 set_capacity(disks[drive], floppy_sizes[new_dev]);
3768 if (old_dev != -1 && old_dev != new_dev) {
3769 if (buffer_drive == drive)
3773 if (UFDCS->rawcmd == 1)
3776 if (!(mode & FMODE_NDELAY)) {
3777 if (mode & (FMODE_READ|FMODE_WRITE)) {
3778 UDRS->last_checked = 0;
3779 check_disk_change(bdev);
3780 if (UTESTF(FD_DISK_CHANGED))
3784 if ((mode & FMODE_WRITE) && !(UTESTF(FD_DISK_WRITABLE)))
3787 mutex_unlock(&open_lock);
3790 if (UDRS->fd_ref < 0)
3795 opened_bdev[drive] = NULL;
3797 mutex_unlock(&open_lock);
3802 * Check if the disk has been changed or if a change has been faked.
3804 static int check_floppy_change(struct gendisk *disk)
3806 int drive = (long)disk->private_data;
3808 if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY))
3811 if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) {
3814 process_fd_request();
3817 if (UTESTF(FD_DISK_CHANGED) ||
3818 UTESTF(FD_VERIFY) ||
3819 test_bit(drive, &fake_change) ||
3820 (!ITYPE(UDRS->fd_device) && !current_type[drive]))
3826 * This implements "read block 0" for floppy_revalidate().
3827 * Needed for format autodetection, checking whether there is
3828 * a disk in the drive, and whether that disk is writable.
3831 static void floppy_rb0_complete(struct bio *bio, int err)
3833 complete((struct completion *)bio->bi_private);
3836 static int __floppy_read_block_0(struct block_device *bdev)
3839 struct bio_vec bio_vec;
3840 struct completion complete;
3844 page = alloc_page(GFP_NOIO);
3846 process_fd_request();
3850 size = bdev->bd_block_size;
3855 bio.bi_io_vec = &bio_vec;
3856 bio_vec.bv_page = page;
3857 bio_vec.bv_len = size;
3858 bio_vec.bv_offset = 0;
3864 init_completion(&complete);
3865 bio.bi_private = &complete;
3866 bio.bi_end_io = floppy_rb0_complete;
3868 submit_bio(READ, &bio);
3869 generic_unplug_device(bdev_get_queue(bdev));
3870 process_fd_request();
3871 wait_for_completion(&complete);
3878 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
3879 * the bootblock (block 0). "Autodetection" is also needed to check whether
3880 * there is a disk in the drive at all... Thus we also do it for fixed
3881 * geometry formats */
3882 static int floppy_revalidate(struct gendisk *disk)
3884 int drive = (long)disk->private_data;
3885 #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device))
3889 if (UTESTF(FD_DISK_CHANGED) ||
3890 UTESTF(FD_VERIFY) || test_bit(drive, &fake_change) || NO_GEOM) {
3891 if (usage_count == 0) {
3892 pr_info("VFS: revalidate called on non-open device.\n");
3896 cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY);
3897 if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)) {
3898 process_fd_request(); /*already done by another thread */
3903 if (buffer_drive == drive)
3905 clear_bit(drive, &fake_change);
3906 UCLEARF(FD_DISK_CHANGED);
3911 res = __floppy_read_block_0(opened_bdev[drive]);
3914 poll_drive(0, FD_RAW_NEED_DISK);
3915 process_fd_request();
3918 set_capacity(disk, floppy_sizes[UDRS->fd_device]);
3922 static const struct block_device_operations floppy_fops = {
3923 .owner = THIS_MODULE,
3924 .open = floppy_open,
3925 .release = floppy_release,
3926 .locked_ioctl = fd_ioctl,
3927 .getgeo = fd_getgeo,
3928 .media_changed = check_floppy_change,
3929 .revalidate_disk = floppy_revalidate,
3933 * Floppy Driver initialization
3934 * =============================
3937 /* Determine the floppy disk controller type */
3938 /* This routine was written by David C. Niemi */
3939 static char __init get_fdc_version(void)
3943 output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */
3948 return FDC_NONE; /* No FDC present ??? */
3949 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3950 pr_info("FDC %d is an 8272A\n", fdc);
3951 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
3954 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
3959 if (!fdc_configure()) {
3960 pr_info("FDC %d is an 82072\n", fdc);
3961 return FDC_82072; /* 82072 doesn't know CONFIGURE */
3964 output_byte(FD_PERPENDICULAR);
3965 if (need_more_output() == MORE_OUTPUT) {
3968 pr_info("FDC %d is an 82072A\n", fdc);
3969 return FDC_82072A; /* 82072A as found on Sparcs. */
3972 output_byte(FD_UNLOCK);
3974 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3975 pr_info("FDC %d is a pre-1991 82077\n", fdc);
3976 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
3979 if ((r != 1) || (reply_buffer[0] != 0x00)) {
3980 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
3984 output_byte(FD_PARTID);
3987 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
3991 if (reply_buffer[0] == 0x80) {
3992 pr_info("FDC %d is a post-1991 82077\n", fdc);
3993 return FDC_82077; /* Revised 82077AA passes all the tests */
3995 switch (reply_buffer[0] >> 5) {
3997 /* Either a 82078-1 or a 82078SL running at 5Volt */
3998 pr_info("FDC %d is an 82078.\n", fdc);
4001 pr_info("FDC %d is a 44pin 82078\n", fdc);
4004 pr_info("FDC %d is a S82078B\n", fdc);
4007 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc);
4010 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n",
4011 fdc, reply_buffer[0] >> 5);
4012 return FDC_82078_UNKN;
4014 } /* get_fdc_version */
4016 /* lilo configuration */
4018 static void __init floppy_set_flags(int *ints, int param, int param2)
4022 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4024 default_drive_params[i].params.flags |= param2;
4026 default_drive_params[i].params.flags &= ~param2;
4028 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param);
4031 static void __init daring(int *ints, int param, int param2)
4035 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4037 default_drive_params[i].params.select_delay = 0;
4038 default_drive_params[i].params.flags |=
4039 FD_SILENT_DCL_CLEAR;
4041 default_drive_params[i].params.select_delay =
4043 default_drive_params[i].params.flags &=
4044 ~FD_SILENT_DCL_CLEAR;
4047 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken");
4050 static void __init set_cmos(int *ints, int dummy, int dummy2)
4052 int current_drive = 0;
4055 DPRINT("wrong number of parameters for CMOS\n");
4058 current_drive = ints[1];
4059 if (current_drive < 0 || current_drive >= 8) {
4060 DPRINT("bad drive for set_cmos\n");
4064 if (current_drive >= 4 && !FDC2)
4068 DPRINT("setting CMOS code to %d\n", ints[2]);
4071 static struct param_table {
4073 void (*fn) (int *ints, int param, int param2);
4077 } config_params[] __initdata = {
4078 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4079 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4080 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0},
4081 {"irq", NULL, &FLOPPY_IRQ, 6, 0},
4082 {"dma", NULL, &FLOPPY_DMA, 2, 0},
4083 {"daring", daring, NULL, 1, 0},
4085 {"two_fdc", NULL, &FDC2, 0x370, 0},
4086 {"one_fdc", NULL, &FDC2, 0, 0},
4088 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL},
4089 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL},
4090 {"messages", floppy_set_flags, NULL, 1, FTD_MSG},
4091 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR},
4092 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG},
4093 {"nodma", NULL, &can_use_virtual_dma, 1, 0},
4094 {"omnibook", NULL, &can_use_virtual_dma, 1, 0},
4095 {"yesdma", NULL, &can_use_virtual_dma, 0, 0},
4096 {"fifo_depth", NULL, &fifo_depth, 0xa, 0},
4097 {"nofifo", NULL, &no_fifo, 0x20, 0},
4098 {"usefifo", NULL, &no_fifo, 0, 0},
4099 {"cmos", set_cmos, NULL, 0, 0},
4100 {"slow", NULL, &slow_floppy, 1, 0},
4101 {"unexpected_interrupts", NULL, &print_unex, 1, 0},
4102 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0},
4103 {"L40SX", NULL, &print_unex, 0, 0}
4108 static int __init floppy_setup(char *str)
4114 str = get_options(str, ARRAY_SIZE(ints), ints);
4116 for (i = 0; i < ARRAY_SIZE(config_params); i++) {
4117 if (strcmp(str, config_params[i].name) == 0) {
4121 param = config_params[i].def_param;
4122 if (config_params[i].fn)
4123 config_params[i].fn(ints, param,
4126 if (config_params[i].var) {
4127 DPRINT("%s=%d\n", str, param);
4128 *config_params[i].var = param;
4135 DPRINT("unknown floppy option [%s]\n", str);
4137 DPRINT("allowed options are:");
4138 for (i = 0; i < ARRAY_SIZE(config_params); i++)
4139 pr_cont(" %s", config_params[i].name);
4142 DPRINT("botched floppy option\n");
4143 DPRINT("Read Documentation/blockdev/floppy.txt\n");
4147 static int have_no_fdc = -ENODEV;
4149 static ssize_t floppy_cmos_show(struct device *dev,
4150 struct device_attribute *attr, char *buf)
4152 struct platform_device *p = to_platform_device(dev);
4156 return sprintf(buf, "%X\n", UDP->cmos);
4159 DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL);
4161 static void floppy_device_release(struct device *dev)
4165 static int floppy_resume(struct device *dev)
4169 for (fdc = 0; fdc < N_FDC; fdc++)
4170 if (FDCS->address != -1)
4171 user_reset_fdc(-1, FD_RESET_ALWAYS, 0);
4176 static const struct dev_pm_ops floppy_pm_ops = {
4177 .resume = floppy_resume,
4178 .restore = floppy_resume,
4181 static struct platform_driver floppy_driver = {
4184 .pm = &floppy_pm_ops,
4188 static struct platform_device floppy_device[N_DRIVE];
4190 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
4192 int drive = (*part & 3) | ((*part & 0x80) >> 5);
4193 if (drive >= N_DRIVE ||
4194 !(allowed_drive_mask & (1 << drive)) ||
4195 fdc_state[FDC(drive)].version == FDC_NONE)
4197 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type))
4200 return get_disk(disks[drive]);
4203 static int __init floppy_init(void)
4208 #if defined(CONFIG_PPC)
4209 if (check_legacy_ioport(FDC1))
4215 for (dr = 0; dr < N_DRIVE; dr++) {
4216 disks[dr] = alloc_disk(1);
4222 disks[dr]->major = FLOPPY_MAJOR;
4223 disks[dr]->first_minor = TOMINOR(dr);
4224 disks[dr]->fops = &floppy_fops;
4225 sprintf(disks[dr]->disk_name, "fd%d", dr);
4227 init_timer(&motor_off_timer[dr]);
4228 motor_off_timer[dr].data = dr;
4229 motor_off_timer[dr].function = motor_off_callback;
4232 err = register_blkdev(FLOPPY_MAJOR, "fd");
4236 err = platform_driver_register(&floppy_driver);
4238 goto out_unreg_blkdev;
4240 floppy_queue = blk_init_queue(do_fd_request, &floppy_lock);
4241 if (!floppy_queue) {
4243 goto out_unreg_driver;
4245 blk_queue_max_hw_sectors(floppy_queue, 64);
4247 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
4248 floppy_find, NULL, NULL);
4250 for (i = 0; i < 256; i++)
4252 floppy_sizes[i] = floppy_type[ITYPE(i)].size;
4254 floppy_sizes[i] = MAX_DISK_SIZE << 1;
4256 reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT);
4259 for (i = 0; i < N_FDC; i++) {
4261 memset(FDCS, 0, sizeof(*FDCS));
4264 #if defined(__sparc__) || defined(__mc68000__)
4265 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4269 FDCS->version = FDC_82072A;
4273 use_virtual_dma = can_use_virtual_dma & 1;
4274 fdc_state[0].address = FDC1;
4275 if (fdc_state[0].address == -1) {
4276 del_timer(&fd_timeout);
4278 goto out_unreg_region;
4281 fdc_state[1].address = FDC2;
4284 fdc = 0; /* reset fdc in case of unexpected interrupt */
4285 err = floppy_grab_irq_and_dma();
4287 del_timer(&fd_timeout);
4289 goto out_unreg_region;
4292 /* initialise drive state */
4293 for (drive = 0; drive < N_DRIVE; drive++) {
4294 memset(UDRS, 0, sizeof(*UDRS));
4295 memset(UDRWE, 0, sizeof(*UDRWE));
4296 USETF(FD_DISK_NEWCHANGE);
4297 USETF(FD_DISK_CHANGED);
4299 UDRS->fd_device = -1;
4300 floppy_track_buffer = NULL;
4301 max_buffer_sectors = 0;
4304 * Small 10 msec delay to let through any interrupt that
4305 * initialization might have triggered, to not
4306 * confuse detection:
4310 for (i = 0; i < N_FDC; i++) {
4312 FDCS->driver_version = FD_DRIVER_VERSION;
4313 for (unit = 0; unit < 4; unit++)
4314 FDCS->track[unit] = 0;
4315 if (FDCS->address == -1)
4318 if (user_reset_fdc(-1, FD_RESET_ALWAYS, 0)) {
4319 /* free ioports reserved by floppy_grab_irq_and_dma() */
4320 floppy_release_regions(fdc);
4322 FDCS->version = FDC_NONE;
4325 /* Try to determine the floppy controller type */
4326 FDCS->version = get_fdc_version();
4327 if (FDCS->version == FDC_NONE) {
4328 /* free ioports reserved by floppy_grab_irq_and_dma() */
4329 floppy_release_regions(fdc);
4333 if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A)
4334 can_use_virtual_dma = 0;
4337 /* Not all FDCs seem to be able to handle the version command
4338 * properly, so force a reset for the standard FDC clones,
4339 * to avoid interrupt garbage.
4341 user_reset_fdc(-1, FD_RESET_ALWAYS, 0);
4344 del_timer(&fd_timeout);
4348 DPRINT("no floppy controllers found\n");
4350 goto out_flush_work;
4353 for (drive = 0; drive < N_DRIVE; drive++) {
4354 if (!(allowed_drive_mask & (1 << drive)))
4356 if (fdc_state[FDC(drive)].version == FDC_NONE)
4359 floppy_device[drive].name = floppy_device_name;
4360 floppy_device[drive].id = drive;
4361 floppy_device[drive].dev.release = floppy_device_release;
4363 err = platform_device_register(&floppy_device[drive]);
4365 goto out_flush_work;
4367 err = device_create_file(&floppy_device[drive].dev,
4370 goto out_unreg_platform_dev;
4372 /* to be cleaned up... */
4373 disks[drive]->private_data = (void *)(long)drive;
4374 disks[drive]->queue = floppy_queue;
4375 disks[drive]->flags |= GENHD_FL_REMOVABLE;
4376 disks[drive]->driverfs_dev = &floppy_device[drive].dev;
4377 add_disk(disks[drive]);
4382 out_unreg_platform_dev:
4383 platform_device_unregister(&floppy_device[drive]);
4385 flush_scheduled_work();
4387 floppy_release_irq_and_dma();
4389 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4390 blk_cleanup_queue(floppy_queue);
4392 platform_driver_unregister(&floppy_driver);
4394 unregister_blkdev(FLOPPY_MAJOR, "fd");
4397 del_timer(&motor_off_timer[dr]);
4398 put_disk(disks[dr]);
4403 static DEFINE_SPINLOCK(floppy_usage_lock);
4405 static const struct io_region {
4410 /* address + 3 is sometimes reserved by pnp bios for motherboard */
4412 /* address + 6 is reserved, and may be taken by IDE.
4413 * Unfortunately, Adaptec doesn't know this :-(, */
4417 static void floppy_release_allocated_regions(int fdc, const struct io_region *p)
4419 while (p != io_regions) {
4421 release_region(FDCS->address + p->offset, p->size);
4425 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
4427 static int floppy_request_regions(int fdc)
4429 const struct io_region *p;
4431 for (p = io_regions; p < ARRAY_END(io_regions); p++) {
4432 if (!request_region(FDCS->address + p->offset,
4433 p->size, "floppy")) {
4434 DPRINT("Floppy io-port 0x%04lx in use\n",
4435 FDCS->address + p->offset);
4436 floppy_release_allocated_regions(fdc, p);
4443 static void floppy_release_regions(int fdc)
4445 floppy_release_allocated_regions(fdc, ARRAY_END(io_regions));
4448 static int floppy_grab_irq_and_dma(void)
4450 unsigned long flags;
4452 spin_lock_irqsave(&floppy_usage_lock, flags);
4453 if (usage_count++) {
4454 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4457 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4460 * We might have scheduled a free_irq(), wait it to
4463 flush_scheduled_work();
4465 if (fd_request_irq()) {
4466 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4468 spin_lock_irqsave(&floppy_usage_lock, flags);
4470 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4473 if (fd_request_dma()) {
4474 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4476 if (can_use_virtual_dma & 2)
4477 use_virtual_dma = can_use_virtual_dma = 1;
4478 if (!(can_use_virtual_dma & 1)) {
4480 spin_lock_irqsave(&floppy_usage_lock, flags);
4482 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4487 for (fdc = 0; fdc < N_FDC; fdc++) {
4488 if (FDCS->address != -1) {
4489 if (floppy_request_regions(fdc))
4493 for (fdc = 0; fdc < N_FDC; fdc++) {
4494 if (FDCS->address != -1) {
4496 fd_outb(FDCS->dor, FD_DOR);
4500 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4502 for (fdc = 0; fdc < N_FDC; fdc++)
4503 if (FDCS->address != -1)
4504 fd_outb(FDCS->dor, FD_DOR);
4506 * The driver will try and free resources and relies on us
4507 * to know if they were allocated or not.
4510 irqdma_allocated = 1;
4516 floppy_release_regions(fdc);
4517 spin_lock_irqsave(&floppy_usage_lock, flags);
4519 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4523 static void floppy_release_irq_and_dma(void)
4526 #ifdef FLOPPY_SANITY_CHECK
4532 unsigned long tmpaddr;
4533 unsigned long flags;
4535 spin_lock_irqsave(&floppy_usage_lock, flags);
4536 if (--usage_count) {
4537 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4540 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4541 if (irqdma_allocated) {
4545 irqdma_allocated = 0;
4551 floppy_enable_hlt();
4553 if (floppy_track_buffer && max_buffer_sectors) {
4554 tmpsize = max_buffer_sectors * 1024;
4555 tmpaddr = (unsigned long)floppy_track_buffer;
4556 floppy_track_buffer = NULL;
4557 max_buffer_sectors = 0;
4558 buffer_min = buffer_max = -1;
4559 fd_dma_mem_free(tmpaddr, tmpsize);
4561 #ifdef FLOPPY_SANITY_CHECK
4563 for (drive = 0; drive < N_FDC * 4; drive++)
4564 if (timer_pending(motor_off_timer + drive))
4565 pr_info("motor off timer %d still active\n", drive);
4568 if (timer_pending(&fd_timeout))
4569 pr_info("floppy timer still active:%s\n", timeout_message);
4570 if (timer_pending(&fd_timer))
4571 pr_info("auxiliary floppy timer still active\n");
4572 if (work_pending(&floppy_work))
4573 pr_info("work still pending\n");
4576 for (fdc = 0; fdc < N_FDC; fdc++)
4577 if (FDCS->address != -1)
4578 floppy_release_regions(fdc);
4584 static char *floppy;
4586 static void __init parse_floppy_cfg_string(char *cfg)
4592 while (*cfg && *cfg != ' ' && *cfg != '\t')
4603 static int __init floppy_module_init(void)
4606 parse_floppy_cfg_string(floppy);
4607 return floppy_init();
4609 module_init(floppy_module_init);
4611 static void __exit floppy_module_exit(void)
4615 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4616 unregister_blkdev(FLOPPY_MAJOR, "fd");
4617 platform_driver_unregister(&floppy_driver);
4619 for (drive = 0; drive < N_DRIVE; drive++) {
4620 del_timer_sync(&motor_off_timer[drive]);
4622 if ((allowed_drive_mask & (1 << drive)) &&
4623 fdc_state[FDC(drive)].version != FDC_NONE) {
4624 del_gendisk(disks[drive]);
4625 device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
4626 platform_device_unregister(&floppy_device[drive]);
4628 put_disk(disks[drive]);
4631 del_timer_sync(&fd_timeout);
4632 del_timer_sync(&fd_timer);
4633 blk_cleanup_queue(floppy_queue);
4636 floppy_release_irq_and_dma();
4638 /* eject disk, if any */
4642 module_exit(floppy_module_exit);
4644 module_param(floppy, charp, 0);
4645 module_param(FLOPPY_IRQ, int, 0);
4646 module_param(FLOPPY_DMA, int, 0);
4647 MODULE_AUTHOR("Alain L. Knaff");
4648 MODULE_SUPPORTED_DEVICE("fd");
4649 MODULE_LICENSE("GPL");
4651 /* This doesn't actually get used other than for module information */
4652 static const struct pnp_device_id floppy_pnpids[] = {
4657 MODULE_DEVICE_TABLE(pnp, floppy_pnpids);
4661 __setup("floppy=", floppy_setup);
4662 module_init(floppy_init)
4665 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);