2 * linux/drivers/block/floppy.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 * Copyright (C) 1993, 1994 Alain Knaff
6 * Copyright (C) 1998 Alan Cox
10 * 02.12.91 - Changed to static variables to indicate need for reset
11 * and recalibrate. This makes some things easier (output_byte reset
12 * checking etc), and means less interrupt jumping in case of errors,
13 * so the code is hopefully easier to understand.
17 * This file is certainly a mess. I've tried my best to get it working,
18 * but I don't like programming floppies, and I have only one anyway.
19 * Urgel. I should check for more errors, and do more graceful error
20 * recovery. Seems there are problems with several drives. I've tried to
21 * correct them. No promises.
25 * As with hd.c, all routines within this file can (and will) be called
26 * by interrupts, so extreme caution is needed. A hardware interrupt
27 * handler may not sleep, or a kernel panic will happen. Thus I cannot
28 * call "floppy-on" directly, but have to set a special timer interrupt
33 * 28.02.92 - made track-buffering routines, based on the routines written
34 * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus.
38 * Automatic floppy-detection and formatting written by Werner Almesberger
39 * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with
40 * the floppy-change signal detection.
44 * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed
45 * FDC data overrun bug, added some preliminary stuff for vertical
48 * 1992/9/17: Added DMA allocation & DMA functions. -- hhb.
50 * TODO: Errors are still not counted properly.
54 * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl)
55 * modeled after the freeware MS-DOS program fdformat/88 V1.8 by
56 * Christoph H. Hochst\"atter.
57 * I have fixed the shift values to the ones I always use. Maybe a new
58 * ioctl() should be created to be able to modify them.
59 * There is a bug in the driver that makes it impossible to format a
60 * floppy as the first thing after bootup.
64 * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and
65 * this helped the floppy driver as well. Much cleaner, and still seems to
69 /* 1994/6/24 --bbroad-- added the floppy table entries and made
70 * minor modifications to allow 2.88 floppies to be run.
73 /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more
78 * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger
79 * format bug fixes, but unfortunately some new bugs too...
82 /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write
83 * errors to allow safe writing by specialized programs.
86 /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks
87 * by defining bit 1 of the "stretch" parameter to mean put sectors on the
88 * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's
89 * drives are "upside-down").
93 * 1995/8/26 -- Andreas Busse -- added Mips support.
97 * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent
98 * features to asm/floppy.h.
102 * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
106 * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of
107 * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting &
108 * use of '0' for NULL.
112 * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation
117 * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives.
121 * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24
122 * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were
123 * being used to store jiffies, which are unsigned longs).
127 * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br>
128 * - get rid of check_region
133 * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no
134 * floppy controller (lingering task on list after module is gone... boom.)
138 * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range
139 * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix
140 * requires many non-obvious changes in arch dependent code.
143 /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>.
144 * Better audit of register_blkdev.
147 #define FLOPPY_SANITY_CHECK
148 #undef FLOPPY_SILENT_DCL_CLEAR
150 #define REALLY_SLOW_IO
153 #define DCL_DEBUG /* debug disk change line */
156 #define debug_dcl(test, fmt, args...) \
157 do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0)
159 #define debug_dcl(test, fmt, args...) \
160 do { if (0) DPRINT(fmt, ##args); } while (0)
164 /* do print messages for unexpected interrupts */
165 static int print_unex = 1;
166 #include <linux/module.h>
167 #include <linux/sched.h>
168 #include <linux/fs.h>
169 #include <linux/kernel.h>
170 #include <linux/timer.h>
171 #include <linux/workqueue.h>
173 #include <linux/fdreg.h>
174 #include <linux/fd.h>
175 #include <linux/hdreg.h>
176 #include <linux/errno.h>
177 #include <linux/slab.h>
178 #include <linux/mm.h>
179 #include <linux/bio.h>
180 #include <linux/string.h>
181 #include <linux/jiffies.h>
182 #include <linux/fcntl.h>
183 #include <linux/delay.h>
184 #include <linux/mc146818rtc.h> /* CMOS defines */
185 #include <linux/ioport.h>
186 #include <linux/interrupt.h>
187 #include <linux/init.h>
188 #include <linux/platform_device.h>
189 #include <linux/mod_devicetable.h>
190 #include <linux/buffer_head.h> /* for invalidate_buffers() */
191 #include <linux/mutex.h>
192 #include <linux/io.h>
193 #include <linux/uaccess.h>
196 * PS/2 floppies have much slower step rates than regular floppies.
197 * It's been recommended that take about 1/4 of the default speed
198 * in some more extreme cases.
200 static int slow_floppy;
204 #include <asm/system.h>
206 static int FLOPPY_IRQ = 6;
207 static int FLOPPY_DMA = 2;
208 static int can_use_virtual_dma = 2;
210 * can use virtual DMA:
211 * 0 = use of virtual DMA disallowed by config
212 * 1 = use of virtual DMA prescribed by config
213 * 2 = no virtual DMA preference configured. By default try hard DMA,
214 * but fall back on virtual DMA when not enough memory available
217 static int use_virtual_dma;
221 * 1 using virtual DMA
222 * This variable is set to virtual when a DMA mem problem arises, and
223 * reset back in floppy_grab_irq_and_dma.
224 * It is not safe to reset it in other circumstances, because the floppy
225 * driver may have several buffers in use at once, and we do currently not
226 * record each buffers capabilities
229 static DEFINE_SPINLOCK(floppy_lock);
231 static unsigned short virtual_dma_port = 0x3f0;
232 irqreturn_t floppy_interrupt(int irq, void *dev_id);
233 static int set_dor(int fdc, char mask, char data);
235 #define K_64 0x10000 /* 64KB */
237 /* the following is the mask of allowed drives. By default units 2 and
238 * 3 of both floppy controllers are disabled, because switching on the
239 * motor of these drives causes system hangs on some PCI computers. drive
240 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
241 * a drive is allowed.
243 * NOTE: This must come before we include the arch floppy header because
244 * some ports reference this variable from there. -DaveM
247 static int allowed_drive_mask = 0x33;
249 #include <asm/floppy.h>
251 static int irqdma_allocated;
253 #define DEVICE_NAME "floppy"
255 #include <linux/blkdev.h>
256 #include <linux/blkpg.h>
257 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
258 #include <linux/completion.h>
260 static struct request *current_req;
261 static struct request_queue *floppy_queue;
262 static void do_fd_request(struct request_queue *q);
264 #ifndef fd_get_dma_residue
265 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
268 /* Dma Memory related stuff */
270 #ifndef fd_dma_mem_free
271 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
274 #ifndef fd_dma_mem_alloc
275 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size))
278 static inline void fallback_on_nodma_alloc(char **addr, size_t l)
280 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
282 return; /* we have the memory */
283 if (can_use_virtual_dma != 2)
284 return; /* no fallback allowed */
285 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n");
286 *addr = (char *)nodma_mem_alloc(l);
292 /* End dma memory related stuff */
294 static unsigned long fake_change;
295 static int initialising = 1;
297 #define ITYPE(x) (((x) >> 2) & 0x1f)
298 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
299 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
300 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
301 /* reverse mapping from unit and fdc to drive */
302 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
304 #define DP (&drive_params[current_drive])
305 #define DRS (&drive_state[current_drive])
306 #define DRWE (&write_errors[current_drive])
307 #define FDCS (&fdc_state[fdc])
308 #define CLEARF(x) clear_bit(x##_BIT, &DRS->flags)
309 #define SETF(x) set_bit(x##_BIT, &DRS->flags)
310 #define TESTF(x) test_bit(x##_BIT, &DRS->flags)
312 #define UDP (&drive_params[drive])
313 #define UDRS (&drive_state[drive])
314 #define UDRWE (&write_errors[drive])
315 #define UFDCS (&fdc_state[FDC(drive)])
316 #define UCLEARF(x) clear_bit(x##_BIT, &UDRS->flags)
317 #define USETF(x) set_bit(x##_BIT, &UDRS->flags)
318 #define UTESTF(x) test_bit(x##_BIT, &UDRS->flags)
320 #define DPRINT(format, args...) \
321 pr_info(DEVICE_NAME "%d: " format, current_drive, ##args)
323 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
324 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
327 #define COMMAND (raw_cmd->cmd[0])
328 #define DR_SELECT (raw_cmd->cmd[1])
329 #define TRACK (raw_cmd->cmd[2])
330 #define HEAD (raw_cmd->cmd[3])
331 #define SECTOR (raw_cmd->cmd[4])
332 #define SIZECODE (raw_cmd->cmd[5])
333 #define SECT_PER_TRACK (raw_cmd->cmd[6])
334 #define GAP (raw_cmd->cmd[7])
335 #define SIZECODE2 (raw_cmd->cmd[8])
339 #define F_SIZECODE (raw_cmd->cmd[2])
340 #define F_SECT_PER_TRACK (raw_cmd->cmd[3])
341 #define F_GAP (raw_cmd->cmd[4])
342 #define F_FILL (raw_cmd->cmd[5])
346 * Maximum disk size (in kilobytes).
347 * This default is used whenever the current disk size is unknown.
348 * [Now it is rather a minimum]
350 #define MAX_DISK_SIZE 4 /* 3984 */
353 * globals used by 'result()'
355 #define MAX_REPLIES 16
356 static unsigned char reply_buffer[MAX_REPLIES];
357 static int inr; /* size of reply buffer, when called from interrupt */
358 #define ST0 (reply_buffer[0])
359 #define ST1 (reply_buffer[1])
360 #define ST2 (reply_buffer[2])
361 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */
362 #define R_TRACK (reply_buffer[3])
363 #define R_HEAD (reply_buffer[4])
364 #define R_SECTOR (reply_buffer[5])
365 #define R_SIZECODE (reply_buffer[6])
367 #define SEL_DLY (2 * HZ / 100)
370 * this struct defines the different floppy drive types.
373 struct floppy_drive_params params;
374 const char *name; /* name printed while booting */
375 } default_drive_params[] = {
376 /* NOTE: the time values in jiffies should be in msec!
378 | Maximum data rate supported by drive type
379 | | Head load time, msec
380 | | | Head unload time, msec (not used)
381 | | | | Step rate interval, usec
382 | | | | | Time needed for spinup time (jiffies)
383 | | | | | | Timeout for spinning down (jiffies)
384 | | | | | | | Spindown offset (where disk stops)
385 | | | | | | | | Select delay
386 | | | | | | | | | RPS
387 | | | | | | | | | | Max number of tracks
388 | | | | | | | | | | | Interrupt timeout
389 | | | | | | | | | | | | Max nonintlv. sectors
390 | | | | | | | | | | | | | -Max Errors- flags */
391 {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0,
392 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" },
394 {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0,
395 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
397 {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0,
398 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
400 {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
401 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/
403 {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
404 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/
406 {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
407 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
409 {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
410 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/
411 /* | --autodetected formats--- | | |
412 * read_track | | Name printed when booting
414 * Frequency of disk change checks */
417 static struct floppy_drive_params drive_params[N_DRIVE];
418 static struct floppy_drive_struct drive_state[N_DRIVE];
419 static struct floppy_write_errors write_errors[N_DRIVE];
420 static struct timer_list motor_off_timer[N_DRIVE];
421 static struct gendisk *disks[N_DRIVE];
422 static struct block_device *opened_bdev[N_DRIVE];
423 static DEFINE_MUTEX(open_lock);
424 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
427 * This struct defines the different floppy types.
429 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
430 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
431 * tells if the disk is in Commodore 1581 format, which means side 0 sectors
432 * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
433 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
434 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
435 * side 0 is on physical side 0 (but with the misnamed sector IDs).
436 * 'stretch' should probably be renamed to something more general, like
439 * Bits 2 through 9 of 'stretch' tell the number of the first sector.
440 * The LSB (bit 2) is flipped. For most disks, the first sector
441 * is 1 (represented by 0x00<<2). For some CP/M and music sampler
442 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
443 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
445 * Other parameters should be self-explanatory (see also setfdprm(8)).
454 | | | | | | Data rate, | 0x40 for perp
455 | | | | | | | Spec1 (stepping rate, head unload
456 | | | | | | | | /fmt gap (gap2) */
457 static struct floppy_struct floppy_type[32] = {
458 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */
459 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
460 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
461 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
462 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
463 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
464 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
465 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
466 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
467 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
469 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
470 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
471 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
472 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
473 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
474 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
475 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
476 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
477 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
478 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
480 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
481 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
482 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
483 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
484 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
485 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
486 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
487 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
488 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
489 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
491 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
492 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
495 #define SECTSIZE (_FD_SECTSIZE(*floppy))
497 /* Auto-detection: Disk type used until the next media change occurs. */
498 static struct floppy_struct *current_type[N_DRIVE];
501 * User-provided type information. current_type points to
502 * the respective entry of this array.
504 static struct floppy_struct user_params[N_DRIVE];
506 static sector_t floppy_sizes[256];
508 static char floppy_device_name[] = "floppy";
511 * The driver is trying to determine the correct media format
512 * while probing is set. rw_interrupt() clears it after a
517 /* Synchronization of FDC access. */
518 #define FD_COMMAND_NONE -1
519 #define FD_COMMAND_ERROR 2
520 #define FD_COMMAND_OKAY 3
522 static volatile int command_status = FD_COMMAND_NONE;
523 static unsigned long fdc_busy;
524 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
525 static DECLARE_WAIT_QUEUE_HEAD(command_done);
527 #define NO_SIGNAL (!interruptible || !signal_pending(current))
528 #define CALL(x) if ((x) == -EINTR) return -EINTR
529 #define ECALL(x) if ((ret = (x))) return ret;
530 #define _WAIT(x,i) CALL(ret=wait_til_done((x),i))
531 #define WAIT(x) _WAIT((x),interruptible)
532 #define IWAIT(x) _WAIT((x),1)
534 /* Errors during formatting are counted here. */
535 static int format_errors;
537 /* Format request descriptor. */
538 static struct format_descr format_req;
541 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
542 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
543 * H is head unload time (1=16ms, 2=32ms, etc)
548 * Because these are written to by the DMA controller, they must
549 * not contain a 64k byte boundary crossing, or data will be
552 static char *floppy_track_buffer;
553 static int max_buffer_sectors;
556 typedef void (*done_f)(int);
557 static struct cont_t {
558 void (*interrupt)(void);
559 /* this is called after the interrupt of the
561 void (*redo)(void); /* this is called to retry the operation */
562 void (*error)(void); /* this is called to tally an error */
563 done_f done; /* this is called to say if the operation has
564 * succeeded/failed */
567 static void floppy_ready(void);
568 static void floppy_start(void);
569 static void process_fd_request(void);
570 static void recalibrate_floppy(void);
571 static void floppy_shutdown(unsigned long);
573 static int floppy_request_regions(int);
574 static void floppy_release_regions(int);
575 static int floppy_grab_irq_and_dma(void);
576 static void floppy_release_irq_and_dma(void);
579 * The "reset" variable should be tested whenever an interrupt is scheduled,
580 * after the commands have been sent. This is to ensure that the driver doesn't
581 * get wedged when the interrupt doesn't come because of a failed command.
582 * reset doesn't need to be tested before sending commands, because
583 * output_byte is automatically disabled when reset is set.
585 static void reset_fdc(void);
588 * These are global variables, as that's the easiest way to give
589 * information to interrupts. They are the data used for the current
593 #define NEED_1_RECAL -2
594 #define NEED_2_RECAL -3
596 static int usage_count;
598 /* buffer related variables */
599 static int buffer_track = -1;
600 static int buffer_drive = -1;
601 static int buffer_min = -1;
602 static int buffer_max = -1;
604 /* fdc related variables, should end up in a struct */
605 static struct floppy_fdc_state fdc_state[N_FDC];
606 static int fdc; /* current fdc */
608 static struct floppy_struct *_floppy = floppy_type;
609 static unsigned char current_drive;
610 static long current_count_sectors;
611 static unsigned char fsector_t; /* sector in track */
612 static unsigned char in_sector_offset; /* offset within physical sector,
613 * expressed in units of 512 bytes */
616 static inline int fd_eject(int drive)
627 static long unsigned debugtimer;
629 static inline void set_debugt(void)
631 debugtimer = jiffies;
634 static inline void debugt(const char *message)
636 if (DP->flags & DEBUGT)
637 pr_info("%s dtime=%lu\n", message, jiffies - debugtimer);
640 static inline void set_debugt(void) { }
641 static inline void debugt(const char *message) { }
644 typedef void (*timeout_fn)(unsigned long);
645 static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0);
647 static const char *timeout_message;
649 #ifdef FLOPPY_SANITY_CHECK
650 static void is_alive(const char *message)
652 /* this routine checks whether the floppy driver is "alive" */
653 if (test_bit(0, &fdc_busy) && command_status < 2
654 && !timer_pending(&fd_timeout)) {
655 DPRINT("timeout handler died: %s\n", message);
660 static void (*do_floppy)(void) = NULL;
662 #ifdef FLOPPY_SANITY_CHECK
666 static void (*lasthandler)(void);
667 static unsigned long interruptjiffies;
668 static unsigned long resultjiffies;
669 static int resultsize;
670 static unsigned long lastredo;
672 static struct output_log {
674 unsigned char status;
675 unsigned long jiffies;
676 } output_log[OLOGSIZE];
678 static int output_log_pos;
681 #define current_reqD -1
682 #define MAXTIMEOUT -2
684 static void __reschedule_timeout(int drive, const char *message, int marg)
686 if (drive == current_reqD)
687 drive = current_drive;
688 del_timer(&fd_timeout);
689 if (drive < 0 || drive >= N_DRIVE) {
690 fd_timeout.expires = jiffies + 20UL * HZ;
693 fd_timeout.expires = jiffies + UDP->timeout;
694 add_timer(&fd_timeout);
695 if (UDP->flags & FD_DEBUG)
696 DPRINT("reschedule timeout %s %d\n", message, marg);
697 timeout_message = message;
700 static void reschedule_timeout(int drive, const char *message, int marg)
704 spin_lock_irqsave(&floppy_lock, flags);
705 __reschedule_timeout(drive, message, marg);
706 spin_unlock_irqrestore(&floppy_lock, flags);
709 #define INFBOUND(a, b) (a) = max_t(int, a, b)
710 #define SUPBOUND(a, b) (a) = min_t(int, a, b)
713 * Bottom half floppy driver.
714 * ==========================
716 * This part of the file contains the code talking directly to the hardware,
717 * and also the main service loop (seek-configure-spinup-command)
722 * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
723 * and the last_checked date.
725 * last_checked is the date of the last check which showed 'no disk change'
726 * FD_DISK_CHANGE is set under two conditions:
727 * 1. The floppy has been changed after some i/o to that floppy already
729 * 2. No floppy disk is in the drive. This is done in order to ensure that
730 * requests are quickly flushed in case there is no disk in the drive. It
731 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
734 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
735 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
736 * each seek. If a disk is present, the disk change line should also be
737 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
738 * change line is set, this means either that no disk is in the drive, or
739 * that it has been removed since the last seek.
741 * This means that we really have a third possibility too:
742 * The floppy has been changed after the last seek.
745 static int disk_change(int drive)
747 int fdc = FDC(drive);
749 #ifdef FLOPPY_SANITY_CHECK
750 if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
751 DPRINT("WARNING disk change called early\n");
752 if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
753 (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
754 DPRINT("probing disk change on unselected drive\n");
755 DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive),
756 (unsigned int)FDCS->dor);
760 debug_dcl(UDP->flags,
761 "checking disk change line for drive %d\n", drive);
762 debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies);
763 debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80);
764 debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags);
766 if (UDP->flags & FD_BROKEN_DCL)
767 return UTESTF(FD_DISK_CHANGED);
768 if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) {
769 USETF(FD_VERIFY); /* verify write protection */
770 if (UDRS->maxblock) {
771 /* mark it changed */
772 USETF(FD_DISK_CHANGED);
775 /* invalidate its geometry */
776 if (UDRS->keep_data >= 0) {
777 if ((UDP->flags & FTD_MSG) &&
778 current_type[drive] != NULL)
779 DPRINT("Disk type is undefined after "
781 current_type[drive] = NULL;
782 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1;
787 UDRS->last_checked = jiffies;
788 UCLEARF(FD_DISK_NEWCHANGE);
793 static inline int is_selected(int dor, int unit)
795 return ((dor & (0x10 << unit)) && (dor & 3) == unit);
798 static int set_dor(int fdc, char mask, char data)
802 unsigned char newdor;
803 unsigned char olddor;
805 if (FDCS->address == -1)
809 newdor = (olddor & mask) | data;
810 if (newdor != olddor) {
812 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) {
813 drive = REVDRIVE(fdc, unit);
814 debug_dcl(UDP->flags,
815 "calling disk change from set_dor\n");
819 fd_outb(newdor, FD_DOR);
822 if (!is_selected(olddor, unit) && is_selected(newdor, unit)) {
823 drive = REVDRIVE(fdc, unit);
824 UDRS->select_date = jiffies;
830 static void twaddle(void)
832 if (DP->select_delay)
834 fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR);
835 fd_outb(FDCS->dor, FD_DOR);
836 DRS->select_date = jiffies;
839 /* reset all driver information about the current fdc. This is needed after
840 * a reset, and after a raw command. */
841 static void reset_fdc_info(int mode)
845 FDCS->spec1 = FDCS->spec2 = -1;
846 FDCS->need_configure = 1;
849 for (drive = 0; drive < N_DRIVE; drive++)
850 if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL))
851 UDRS->track = NEED_2_RECAL;
854 /* selects the fdc and drive, and enables the fdc's input/dma. */
855 static void set_fdc(int drive)
857 if (drive >= 0 && drive < N_DRIVE) {
859 current_drive = drive;
861 if (fdc != 1 && fdc != 0) {
862 pr_info("bad fdc value\n");
867 set_dor(1 - fdc, ~8, 0);
869 if (FDCS->rawcmd == 2)
871 if (fd_inb(FD_STATUS) != STATUS_READY)
875 /* locks the driver */
876 static int _lock_fdc(int drive, int interruptible, int line)
879 pr_err("Trying to lock fdc while usage count=0 at line %d\n",
884 if (test_and_set_bit(0, &fdc_busy)) {
885 DECLARE_WAITQUEUE(wait, current);
886 add_wait_queue(&fdc_wait, &wait);
889 set_current_state(TASK_INTERRUPTIBLE);
891 if (!test_and_set_bit(0, &fdc_busy))
897 remove_wait_queue(&fdc_wait, &wait);
902 set_current_state(TASK_RUNNING);
903 remove_wait_queue(&fdc_wait, &wait);
904 flush_scheduled_work();
906 command_status = FD_COMMAND_NONE;
908 __reschedule_timeout(drive, "lock fdc", 0);
913 #define lock_fdc(drive, interruptible) \
914 _lock_fdc(drive, interruptible, __LINE__)
916 /* unlocks the driver */
917 static inline void unlock_fdc(void)
922 if (!test_bit(0, &fdc_busy))
923 DPRINT("FDC access conflict!\n");
926 DPRINT("device interrupt still active at FDC release: %p!\n",
928 command_status = FD_COMMAND_NONE;
929 spin_lock_irqsave(&floppy_lock, flags);
930 del_timer(&fd_timeout);
932 clear_bit(0, &fdc_busy);
933 if (current_req || blk_peek_request(floppy_queue))
934 do_fd_request(floppy_queue);
935 spin_unlock_irqrestore(&floppy_lock, flags);
939 /* switches the motor off after a given timeout */
940 static void motor_off_callback(unsigned long nr)
942 unsigned char mask = ~(0x10 << UNIT(nr));
944 set_dor(FDC(nr), mask, 0);
947 /* schedules motor off */
948 static void floppy_off(unsigned int drive)
950 unsigned long volatile delta;
951 int fdc = FDC(drive);
953 if (!(FDCS->dor & (0x10 << UNIT(drive))))
956 del_timer(motor_off_timer + drive);
958 /* make spindle stop in a position which minimizes spinup time
961 delta = jiffies - UDRS->first_read_date + HZ -
962 UDP->spindown_offset;
963 delta = ((delta * UDP->rps) % HZ) / UDP->rps;
964 motor_off_timer[drive].expires =
965 jiffies + UDP->spindown - delta;
967 add_timer(motor_off_timer + drive);
971 * cycle through all N_DRIVE floppy drives, for disk change testing.
972 * stopping at current drive. This is done before any long operation, to
973 * be sure to have up to date disk change information.
975 static void scandrives(void)
981 if (DP->select_delay)
984 saved_drive = current_drive;
985 for (i = 0; i < N_DRIVE; i++) {
986 drive = (saved_drive + i + 1) % N_DRIVE;
987 if (UDRS->fd_ref == 0 || UDP->select_delay != 0)
988 continue; /* skip closed drives */
990 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &
991 (0x10 << UNIT(drive))))
992 /* switch the motor off again, if it was off to
994 set_dor(fdc, ~(0x10 << UNIT(drive)), 0);
996 set_fdc(saved_drive);
999 static void empty(void)
1003 static DECLARE_WORK(floppy_work, NULL);
1005 static void schedule_bh(void (*handler)(void))
1007 PREPARE_WORK(&floppy_work, (work_func_t)handler);
1008 schedule_work(&floppy_work);
1011 static DEFINE_TIMER(fd_timer, NULL, 0, 0);
1013 static void cancel_activity(void)
1015 unsigned long flags;
1017 spin_lock_irqsave(&floppy_lock, flags);
1019 PREPARE_WORK(&floppy_work, (work_func_t)empty);
1020 del_timer(&fd_timer);
1021 spin_unlock_irqrestore(&floppy_lock, flags);
1024 /* this function makes sure that the disk stays in the drive during the
1026 static void fd_watchdog(void)
1028 debug_dcl(DP->flags, "calling disk change from watchdog\n");
1030 if (disk_change(current_drive)) {
1031 DPRINT("disk removed during i/o\n");
1036 del_timer(&fd_timer);
1037 fd_timer.function = (timeout_fn)fd_watchdog;
1038 fd_timer.expires = jiffies + HZ / 10;
1039 add_timer(&fd_timer);
1043 static void main_command_interrupt(void)
1045 del_timer(&fd_timer);
1049 /* waits for a delay (spinup or select) to pass */
1050 static int fd_wait_for_completion(unsigned long delay, timeout_fn function)
1053 reset_fdc(); /* do the reset during sleep to win time
1054 * if we don't need to sleep, it's a good
1055 * occasion anyways */
1059 if (time_before(jiffies, delay)) {
1060 del_timer(&fd_timer);
1061 fd_timer.function = function;
1062 fd_timer.expires = delay;
1063 add_timer(&fd_timer);
1069 static DEFINE_SPINLOCK(floppy_hlt_lock);
1070 static int hlt_disabled;
1071 static void floppy_disable_hlt(void)
1073 unsigned long flags;
1075 spin_lock_irqsave(&floppy_hlt_lock, flags);
1076 if (!hlt_disabled) {
1078 #ifdef HAVE_DISABLE_HLT
1082 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1085 static void floppy_enable_hlt(void)
1087 unsigned long flags;
1089 spin_lock_irqsave(&floppy_hlt_lock, flags);
1092 #ifdef HAVE_DISABLE_HLT
1096 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1099 static void setup_DMA(void)
1103 #ifdef FLOPPY_SANITY_CHECK
1104 if (raw_cmd->length == 0) {
1107 pr_info("zero dma transfer size:");
1108 for (i = 0; i < raw_cmd->cmd_count; i++)
1109 pr_cont("%x,", raw_cmd->cmd[i]);
1115 if (((unsigned long)raw_cmd->kernel_data) % 512) {
1116 pr_info("non aligned address: %p\n", raw_cmd->kernel_data);
1122 f = claim_dma_lock();
1125 if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length,
1126 (raw_cmd->flags & FD_RAW_READ) ?
1127 DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) {
1128 release_dma_lock(f);
1133 release_dma_lock(f);
1136 fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length);
1137 fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ?
1138 DMA_MODE_READ : DMA_MODE_WRITE);
1139 fd_set_dma_addr(raw_cmd->kernel_data);
1140 fd_set_dma_count(raw_cmd->length);
1141 virtual_dma_port = FDCS->address;
1143 release_dma_lock(f);
1145 floppy_disable_hlt();
1148 static void show_floppy(void);
1150 /* waits until the fdc becomes ready */
1151 static int wait_til_ready(void)
1158 for (counter = 0; counter < 10000; counter++) {
1159 status = fd_inb(FD_STATUS);
1160 if (status & STATUS_READY)
1163 if (!initialising) {
1164 DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc);
1171 /* sends a command byte to the fdc */
1172 static int output_byte(char byte)
1174 int status = wait_til_ready();
1178 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY) {
1179 fd_outb(byte, FD_DATA);
1180 #ifdef FLOPPY_SANITY_CHECK
1181 output_log[output_log_pos].data = byte;
1182 output_log[output_log_pos].status = status;
1183 output_log[output_log_pos].jiffies = jiffies;
1184 output_log_pos = (output_log_pos + 1) % OLOGSIZE;
1189 if (!initialising) {
1190 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
1197 /* gets the response from the fdc */
1198 static int result(void)
1203 for (i = 0; i < MAX_REPLIES; i++) {
1204 status = wait_til_ready();
1207 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA;
1208 if ((status & ~STATUS_BUSY) == STATUS_READY) {
1209 #ifdef FLOPPY_SANITY_CHECK
1210 resultjiffies = jiffies;
1215 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY))
1216 reply_buffer[i] = fd_inb(FD_DATA);
1220 if (!initialising) {
1222 ("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
1230 #define MORE_OUTPUT -2
1231 /* does the fdc need more output? */
1232 static int need_more_output(void)
1234 int status = wait_til_ready();
1238 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY)
1243 /* Set perpendicular mode as required, based on data rate, if supported.
1244 * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1246 static inline void perpendicular_mode(void)
1248 unsigned char perp_mode;
1250 if (raw_cmd->rate & 0x40) {
1251 switch (raw_cmd->rate & 3) {
1259 DPRINT("Invalid data rate for perpendicular mode!\n");
1263 * convenient way to return to
1264 * redo without too much hassle
1265 * (deep stack et al.)
1272 if (FDCS->perp_mode == perp_mode)
1274 if (FDCS->version >= FDC_82077_ORIG) {
1275 output_byte(FD_PERPENDICULAR);
1276 output_byte(perp_mode);
1277 FDCS->perp_mode = perp_mode;
1278 } else if (perp_mode) {
1279 DPRINT("perpendicular mode not supported by this FDC.\n");
1281 } /* perpendicular_mode */
1283 static int fifo_depth = 0xa;
1286 static int fdc_configure(void)
1289 output_byte(FD_CONFIGURE);
1290 if (need_more_output() != MORE_OUTPUT)
1293 output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf));
1294 output_byte(0); /* pre-compensation from track
1299 #define NOMINAL_DTR 500
1301 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1302 * head load time, and DMA disable flag to values needed by floppy.
1304 * The value "dtr" is the data transfer rate in Kbps. It is needed
1305 * to account for the data rate-based scaling done by the 82072 and 82077
1306 * FDC types. This parameter is ignored for other types of FDCs (i.e.
1309 * Note that changing the data transfer rate has a (probably deleterious)
1310 * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1311 * fdc_specify is called again after each data transfer rate
1314 * srt: 1000 to 16000 in microseconds
1315 * hut: 16 to 240 milliseconds
1316 * hlt: 2 to 254 milliseconds
1318 * These values are rounded up to the next highest available delay time.
1320 static void fdc_specify(void)
1322 unsigned char spec1;
1323 unsigned char spec2;
1327 unsigned long dtr = NOMINAL_DTR;
1328 unsigned long scale_dtr = NOMINAL_DTR;
1329 int hlt_max_code = 0x7f;
1330 int hut_max_code = 0xf;
1332 if (FDCS->need_configure && FDCS->version >= FDC_82072A) {
1334 FDCS->need_configure = 0;
1337 switch (raw_cmd->rate & 0x03) {
1343 if (FDCS->version >= FDC_82078) {
1344 /* chose the default rate table, not the one
1345 * where 1 = 2 Mbps */
1346 output_byte(FD_DRIVESPEC);
1347 if (need_more_output() == MORE_OUTPUT) {
1348 output_byte(UNIT(current_drive));
1358 if (FDCS->version >= FDC_82072) {
1360 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1361 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1364 /* Convert step rate from microseconds to milliseconds and 4 bits */
1365 srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR);
1372 hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR);
1375 else if (hlt > 0x7f)
1378 hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR);
1384 spec1 = (srt << 4) | hut;
1385 spec2 = (hlt << 1) | (use_virtual_dma & 1);
1387 /* If these parameters did not change, just return with success */
1388 if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) {
1389 /* Go ahead and set spec1 and spec2 */
1390 output_byte(FD_SPECIFY);
1391 output_byte(FDCS->spec1 = spec1);
1392 output_byte(FDCS->spec2 = spec2);
1396 /* Set the FDC's data transfer rate on behalf of the specified drive.
1397 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1398 * of the specify command (i.e. using the fdc_specify function).
1400 static int fdc_dtr(void)
1402 /* If data rate not already set to desired value, set it. */
1403 if ((raw_cmd->rate & 3) == FDCS->dtr)
1407 fd_outb(raw_cmd->rate & 3, FD_DCR);
1409 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1410 * need a stabilization period of several milliseconds to be
1411 * enforced after data rate changes before R/W operations.
1412 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1414 FDCS->dtr = raw_cmd->rate & 3;
1415 return fd_wait_for_completion(jiffies + 2UL * HZ / 100,
1416 (timeout_fn)floppy_ready);
1419 static void tell_sector(void)
1421 pr_cont(": track %d, head %d, sector %d, size %d",
1422 R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE);
1425 static void print_errors(void)
1428 if (ST0 & ST0_ECE) {
1429 pr_cont("Recalibrate failed!");
1430 } else if (ST2 & ST2_CRC) {
1431 pr_cont("data CRC error");
1433 } else if (ST1 & ST1_CRC) {
1434 pr_cont("CRC error");
1436 } else if ((ST1 & (ST1_MAM | ST1_ND)) ||
1439 pr_cont("sector not found");
1442 pr_cont("probe failed...");
1443 } else if (ST2 & ST2_WC) { /* seek error */
1444 pr_cont("wrong cylinder");
1445 } else if (ST2 & ST2_BC) { /* cylinder marked as bad */
1446 pr_cont("bad cylinder");
1448 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
1456 * OK, this error interpreting routine is called after a
1457 * DMA read/write has succeeded
1458 * or failed, so we check the results, and copy any buffers.
1459 * hhb: Added better error reporting.
1460 * ak: Made this into a separate routine.
1462 static int interpret_errors(void)
1467 DPRINT("-- FDC reply error");
1472 /* check IC to find cause of interrupt */
1473 switch (ST0 & ST0_INTR) {
1474 case 0x40: /* error occurred during command execution */
1476 return 0; /* occurs with pseudo-DMA */
1479 DPRINT("Drive is write protected\n");
1480 CLEARF(FD_DISK_WRITABLE);
1483 } else if (ST1 & ST1_ND) {
1484 SETF(FD_NEED_TWADDLE);
1485 } else if (ST1 & ST1_OR) {
1486 if (DP->flags & FTD_MSG)
1487 DPRINT("Over/Underrun - retrying\n");
1489 } else if (*errors >= DP->max_errors.reporting) {
1492 if (ST2 & ST2_WC || ST2 & ST2_BC)
1493 /* wrong cylinder => recal */
1494 DRS->track = NEED_2_RECAL;
1496 case 0x80: /* invalid command given */
1497 DPRINT("Invalid FDC command given!\n");
1501 DPRINT("Abnormal termination caused by polling\n");
1504 default: /* (0) Normal command termination */
1510 * This routine is called when everything should be correctly set up
1511 * for the transfer (i.e. floppy motor is on, the correct floppy is
1512 * selected, and the head is sitting on the right track).
1514 static void setup_rw_floppy(void)
1520 unsigned long ready_date;
1521 timeout_fn function;
1523 flags = raw_cmd->flags;
1524 if (flags & (FD_RAW_READ | FD_RAW_WRITE))
1525 flags |= FD_RAW_INTR;
1527 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) {
1528 ready_date = DRS->spinup_date + DP->spinup;
1529 /* If spinup will take a long time, rerun scandrives
1530 * again just before spinup completion. Beware that
1531 * after scandrives, we must again wait for selection.
1533 if (time_after(ready_date, jiffies + DP->select_delay)) {
1534 ready_date -= DP->select_delay;
1535 function = (timeout_fn)floppy_start;
1537 function = (timeout_fn)setup_rw_floppy;
1539 /* wait until the floppy is spinning fast enough */
1540 if (fd_wait_for_completion(ready_date, function))
1543 dflags = DRS->flags;
1545 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE))
1548 if (flags & FD_RAW_INTR)
1549 do_floppy = main_command_interrupt;
1552 for (i = 0; i < raw_cmd->cmd_count; i++)
1553 r |= output_byte(raw_cmd->cmd[i]);
1555 debugt("rw_command: ");
1563 if (!(flags & FD_RAW_INTR)) {
1566 } else if (flags & FD_RAW_NEED_DISK)
1570 static int blind_seek;
1573 * This is the routine called after every seek (or recalibrate) interrupt
1574 * from the floppy controller.
1576 static void seek_interrupt(void)
1578 debugt("seek interrupt:");
1579 if (inr != 2 || (ST0 & 0xF8) != 0x20) {
1580 DPRINT("seek failed\n");
1581 DRS->track = NEED_2_RECAL;
1586 if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) {
1587 debug_dcl(DP->flags,
1588 "clearing NEWCHANGE flag because of effective seek\n");
1589 debug_dcl(DP->flags, "jiffies=%lu\n", jiffies);
1590 CLEARF(FD_DISK_NEWCHANGE); /* effective seek */
1591 DRS->select_date = jiffies;
1597 static void check_wp(void)
1599 if (TESTF(FD_VERIFY)) {
1600 /* check write protection */
1601 output_byte(FD_GETSTATUS);
1602 output_byte(UNIT(current_drive));
1603 if (result() != 1) {
1608 CLEARF(FD_NEED_TWADDLE);
1609 debug_dcl(DP->flags,
1610 "checking whether disk is write protected\n");
1611 debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40);
1613 SETF(FD_DISK_WRITABLE);
1615 CLEARF(FD_DISK_WRITABLE);
1619 static void seek_floppy(void)
1625 debug_dcl(DP->flags, "calling disk change from seek\n");
1627 if (!TESTF(FD_DISK_NEWCHANGE) &&
1628 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) {
1629 /* the media changed flag should be cleared after the seek.
1630 * If it isn't, this means that there is really no disk in
1633 SETF(FD_DISK_CHANGED);
1638 if (DRS->track <= NEED_1_RECAL) {
1639 recalibrate_floppy();
1641 } else if (TESTF(FD_DISK_NEWCHANGE) &&
1642 (raw_cmd->flags & FD_RAW_NEED_DISK) &&
1643 (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) {
1644 /* we seek to clear the media-changed condition. Does anybody
1645 * know a more elegant way, which works on all drives? */
1647 track = raw_cmd->track - 1;
1649 if (DP->flags & FD_SILENT_DCL_CLEAR) {
1650 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0);
1652 raw_cmd->flags |= FD_RAW_NEED_SEEK;
1658 if (raw_cmd->track != DRS->track &&
1659 (raw_cmd->flags & FD_RAW_NEED_SEEK))
1660 track = raw_cmd->track;
1667 do_floppy = seek_interrupt;
1668 output_byte(FD_SEEK);
1669 output_byte(UNIT(current_drive));
1670 if (output_byte(track) < 0) {
1674 debugt("seek command:");
1677 static void recal_interrupt(void)
1679 debugt("recal interrupt:");
1682 else if (ST0 & ST0_ECE) {
1683 switch (DRS->track) {
1685 debugt("recal interrupt need 1 recal:");
1686 /* after a second recalibrate, we still haven't
1687 * reached track 0. Probably no drive. Raise an
1688 * error, as failing immediately might upset
1689 * computers possessed by the Devil :-) */
1694 debugt("recal interrupt need 2 recal:");
1695 /* If we already did a recalibrate,
1696 * and we are not at track 0, this
1697 * means we have moved. (The only way
1698 * not to move at recalibration is to
1699 * be already at track 0.) Clear the
1700 * new change flag */
1701 debug_dcl(DP->flags,
1702 "clearing NEWCHANGE flag because of second recalibrate\n");
1704 CLEARF(FD_DISK_NEWCHANGE);
1705 DRS->select_date = jiffies;
1708 debugt("recal interrupt default:");
1709 /* Recalibrate moves the head by at
1710 * most 80 steps. If after one
1711 * recalibrate we don't have reached
1712 * track 0, this might mean that we
1713 * started beyond track 80. Try
1715 DRS->track = NEED_1_RECAL;
1723 static void print_result(char *message, int inr)
1727 DPRINT("%s ", message);
1729 for (i = 0; i < inr; i++)
1730 pr_cont("repl[%d]=%x ", i, reply_buffer[i]);
1734 /* interrupt handler. Note that this can be called externally on the Sparc */
1735 irqreturn_t floppy_interrupt(int irq, void *dev_id)
1739 void (*handler)(void) = do_floppy;
1741 lasthandler = handler;
1742 interruptjiffies = jiffies;
1744 f = claim_dma_lock();
1746 release_dma_lock(f);
1748 floppy_enable_hlt();
1750 if (fdc >= N_FDC || FDCS->address == -1) {
1751 /* we don't even know which FDC is the culprit */
1752 pr_info("DOR0=%x\n", fdc_state[0].dor);
1753 pr_info("floppy interrupt on bizarre fdc %d\n", fdc);
1754 pr_info("handler=%p\n", handler);
1755 is_alive("bizarre fdc");
1760 /* We have to clear the reset flag here, because apparently on boxes
1761 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
1762 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
1763 * emission of the SENSEI's.
1764 * It is OK to emit floppy commands because we are in an interrupt
1765 * handler here, and thus we have to fear no interference of other
1769 do_print = !handler && print_unex && !initialising;
1773 print_result("unexpected interrupt", inr);
1777 output_byte(FD_SENSEI);
1780 print_result("sensei", inr);
1782 } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2
1789 schedule_bh(handler);
1790 is_alive("normal interrupt end");
1792 /* FIXME! Was it really for us? */
1796 static void recalibrate_floppy(void)
1798 debugt("recalibrate floppy:");
1799 do_floppy = recal_interrupt;
1800 output_byte(FD_RECALIBRATE);
1801 if (output_byte(UNIT(current_drive)) < 0) {
1808 * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1810 static void reset_interrupt(void)
1812 debugt("reset interrupt:");
1813 result(); /* get the status ready for set_fdc */
1815 pr_info("reset set in interrupt, calling %p\n", cont->error);
1816 cont->error(); /* a reset just after a reset. BAD! */
1822 * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1823 * or by setting the self clearing bit 7 of STATUS (newer FDCs)
1825 static void reset_fdc(void)
1827 unsigned long flags;
1829 do_floppy = reset_interrupt;
1833 /* Pseudo-DMA may intercept 'reset finished' interrupt. */
1834 /* Irrelevant for systems with true DMA (i386). */
1836 flags = claim_dma_lock();
1838 release_dma_lock(flags);
1840 if (FDCS->version >= FDC_82072A)
1841 fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS);
1843 fd_outb(FDCS->dor & ~0x04, FD_DOR);
1844 udelay(FD_RESET_DELAY);
1845 fd_outb(FDCS->dor, FD_DOR);
1849 static void show_floppy(void)
1854 pr_info("floppy driver state\n");
1855 pr_info("-------------------\n");
1856 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n",
1857 jiffies, interruptjiffies, jiffies - interruptjiffies,
1860 #ifdef FLOPPY_SANITY_CHECK
1861 pr_info("timeout_message=%s\n", timeout_message);
1862 pr_info("last output bytes:\n");
1863 for (i = 0; i < OLOGSIZE; i++)
1864 pr_info("%2x %2x %lu\n",
1865 output_log[(i + output_log_pos) % OLOGSIZE].data,
1866 output_log[(i + output_log_pos) % OLOGSIZE].status,
1867 output_log[(i + output_log_pos) % OLOGSIZE].jiffies);
1868 pr_info("last result at %lu\n", resultjiffies);
1869 pr_info("last redo_fd_request at %lu\n", lastredo);
1870 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1,
1871 reply_buffer, resultsize, true);
1874 pr_info("status=%x\n", fd_inb(FD_STATUS));
1875 pr_info("fdc_busy=%lu\n", fdc_busy);
1877 pr_info("do_floppy=%p\n", do_floppy);
1878 if (work_pending(&floppy_work))
1879 pr_info("floppy_work.func=%p\n", floppy_work.func);
1880 if (timer_pending(&fd_timer))
1881 pr_info("fd_timer.function=%p\n", fd_timer.function);
1882 if (timer_pending(&fd_timeout)) {
1883 pr_info("timer_function=%p\n", fd_timeout.function);
1884 pr_info("expires=%lu\n", fd_timeout.expires - jiffies);
1885 pr_info("now=%lu\n", jiffies);
1887 pr_info("cont=%p\n", cont);
1888 pr_info("current_req=%p\n", current_req);
1889 pr_info("command_status=%d\n", command_status);
1893 static void floppy_shutdown(unsigned long data)
1895 unsigned long flags;
1901 floppy_enable_hlt();
1903 flags = claim_dma_lock();
1905 release_dma_lock(flags);
1907 /* avoid dma going to a random drive after shutdown */
1910 DPRINT("floppy timeout called\n");
1914 cont->redo(); /* this will recall reset when needed */
1916 pr_info("no cont in shutdown!\n");
1917 process_fd_request();
1919 is_alive("floppy shutdown");
1922 /* start motor, check media-changed condition and write protection */
1923 static int start_motor(void (*function)(void))
1929 data = UNIT(current_drive);
1930 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) {
1931 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) {
1933 /* no read since this drive is running */
1934 DRS->first_read_date = 0;
1935 /* note motor start time if motor is not yet running */
1936 DRS->spinup_date = jiffies;
1937 data |= (0x10 << UNIT(current_drive));
1939 } else if (FDCS->dor & (0x10 << UNIT(current_drive)))
1940 mask &= ~(0x10 << UNIT(current_drive));
1942 /* starts motor and selects floppy */
1943 del_timer(motor_off_timer + current_drive);
1944 set_dor(fdc, mask, data);
1946 /* wait_for_completion also schedules reset if needed. */
1947 return fd_wait_for_completion(DRS->select_date + DP->select_delay,
1948 (timeout_fn)function);
1951 static void floppy_ready(void)
1957 if (start_motor(floppy_ready))
1962 debug_dcl(DP->flags, "calling disk change from floppy_ready\n");
1963 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
1964 disk_change(current_drive) && !DP->select_delay)
1965 twaddle(); /* this clears the dcl on certain
1966 * drive/controller combinations */
1968 #ifdef fd_chose_dma_mode
1969 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) {
1970 unsigned long flags = claim_dma_lock();
1971 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length);
1972 release_dma_lock(flags);
1976 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) {
1977 perpendicular_mode();
1978 fdc_specify(); /* must be done here because of hut, hlt ... */
1981 if ((raw_cmd->flags & FD_RAW_READ) ||
1982 (raw_cmd->flags & FD_RAW_WRITE))
1988 static void floppy_start(void)
1990 reschedule_timeout(current_reqD, "floppy start", 0);
1993 debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n");
1994 SETF(FD_DISK_NEWCHANGE);
1999 * ========================================================================
2000 * here ends the bottom half. Exported routines are:
2001 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
2002 * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
2003 * Initialization also uses output_byte, result, set_dor, floppy_interrupt
2005 * ========================================================================
2008 * General purpose continuations.
2009 * ==============================
2012 static void do_wakeup(void)
2014 reschedule_timeout(MAXTIMEOUT, "do wakeup", 0);
2016 command_status += 2;
2017 wake_up(&command_done);
2020 static struct cont_t wakeup_cont = {
2024 .done = (done_f)empty
2027 static struct cont_t intr_cont = {
2029 .redo = process_fd_request,
2031 .done = (done_f)empty
2034 static int wait_til_done(void (*handler)(void), int interruptible)
2038 schedule_bh(handler);
2040 if (command_status < 2 && NO_SIGNAL) {
2041 DECLARE_WAITQUEUE(wait, current);
2043 add_wait_queue(&command_done, &wait);
2045 set_current_state(interruptible ?
2046 TASK_INTERRUPTIBLE :
2047 TASK_UNINTERRUPTIBLE);
2049 if (command_status >= 2 || !NO_SIGNAL)
2052 is_alive("wait_til_done");
2056 set_current_state(TASK_RUNNING);
2057 remove_wait_queue(&command_done, &wait);
2060 if (command_status < 2) {
2068 command_status = FD_COMMAND_ERROR;
2069 if (command_status == FD_COMMAND_OKAY)
2073 command_status = FD_COMMAND_NONE;
2077 static void generic_done(int result)
2079 command_status = result;
2080 cont = &wakeup_cont;
2083 static void generic_success(void)
2088 static void generic_failure(void)
2093 static void success_and_wakeup(void)
2100 * formatting and rw support.
2101 * ==========================
2104 static int next_valid_format(void)
2108 probed_format = DRS->probed_format;
2110 if (probed_format >= 8 || !DP->autodetect[probed_format]) {
2111 DRS->probed_format = 0;
2114 if (floppy_type[DP->autodetect[probed_format]].sect) {
2115 DRS->probed_format = probed_format;
2122 static void bad_flp_intr(void)
2127 DRS->probed_format++;
2128 if (!next_valid_format())
2131 err_count = ++(*errors);
2132 INFBOUND(DRWE->badness, err_count);
2133 if (err_count > DP->max_errors.abort)
2135 if (err_count > DP->max_errors.reset)
2137 else if (err_count > DP->max_errors.recal)
2138 DRS->track = NEED_2_RECAL;
2141 static void set_floppy(int drive)
2143 int type = ITYPE(UDRS->fd_device);
2146 _floppy = floppy_type + type;
2148 _floppy = current_type[drive];
2152 * formatting support.
2153 * ===================
2155 static void format_interrupt(void)
2157 switch (interpret_errors()) {
2168 #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2)
2169 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1))
2170 #define CT(x) ((x) | 0xc0)
2172 static void setup_format_params(int track)
2180 unsigned char track, head, sect, size;
2181 } *here = (struct fparm *)floppy_track_buffer;
2183 raw_cmd = &default_raw_cmd;
2184 raw_cmd->track = track;
2186 raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
2187 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK);
2188 raw_cmd->rate = _floppy->rate & 0x43;
2189 raw_cmd->cmd_count = NR_F;
2190 COMMAND = FM_MODE(_floppy, FD_FORMAT);
2191 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head);
2192 F_SIZECODE = FD_SIZECODE(_floppy);
2193 F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE;
2194 F_GAP = _floppy->fmt_gap;
2195 F_FILL = FD_FILL_BYTE;
2197 raw_cmd->kernel_data = floppy_track_buffer;
2198 raw_cmd->length = 4 * F_SECT_PER_TRACK;
2200 /* allow for about 30ms for data transport per track */
2201 head_shift = (F_SECT_PER_TRACK + 5) / 6;
2203 /* a ``cylinder'' is two tracks plus a little stepping time */
2204 track_shift = 2 * head_shift + 3;
2206 /* position of logical sector 1 on this track */
2207 n = (track_shift * format_req.track + head_shift * format_req.head)
2210 /* determine interleave */
2212 if (_floppy->fmt_gap < 0x22)
2215 /* initialize field */
2216 for (count = 0; count < F_SECT_PER_TRACK; ++count) {
2217 here[count].track = format_req.track;
2218 here[count].head = format_req.head;
2219 here[count].sect = 0;
2220 here[count].size = F_SIZECODE;
2222 /* place logical sectors */
2223 for (count = 1; count <= F_SECT_PER_TRACK; ++count) {
2224 here[n].sect = count;
2225 n = (n + il) % F_SECT_PER_TRACK;
2226 if (here[n].sect) { /* sector busy, find next free sector */
2228 if (n >= F_SECT_PER_TRACK) {
2229 n -= F_SECT_PER_TRACK;
2230 while (here[n].sect)
2235 if (_floppy->stretch & FD_SECTBASEMASK) {
2236 for (count = 0; count < F_SECT_PER_TRACK; count++)
2237 here[count].sect += FD_SECTBASE(_floppy) - 1;
2241 static void redo_format(void)
2244 setup_format_params(format_req.track << STRETCH(_floppy));
2246 debugt("queue format request");
2249 static struct cont_t format_cont = {
2250 .interrupt = format_interrupt,
2251 .redo = redo_format,
2252 .error = bad_flp_intr,
2253 .done = generic_done
2256 static int do_format(int drive, struct format_descr *tmp_format_req)
2260 if (lock_fdc(drive, 1))
2265 _floppy->track > DP->tracks ||
2266 tmp_format_req->track >= _floppy->track ||
2267 tmp_format_req->head >= _floppy->head ||
2268 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
2269 !_floppy->fmt_gap) {
2270 process_fd_request();
2273 format_req = *tmp_format_req;
2275 cont = &format_cont;
2276 errors = &format_errors;
2278 process_fd_request();
2283 * Buffer read/write and support
2284 * =============================
2287 static void floppy_end_request(struct request *req, int error)
2289 unsigned int nr_sectors = current_count_sectors;
2290 unsigned int drive = (unsigned long)req->rq_disk->private_data;
2292 /* current_count_sectors can be zero if transfer failed */
2294 nr_sectors = blk_rq_cur_sectors(req);
2295 if (__blk_end_request(req, error, nr_sectors << 9))
2298 /* We're done with the request */
2303 /* new request_done. Can handle physical sectors which are smaller than a
2305 static void request_done(int uptodate)
2307 struct request_queue *q = floppy_queue;
2308 struct request *req = current_req;
2309 unsigned long flags;
2313 reschedule_timeout(MAXTIMEOUT, "request done", uptodate);
2316 pr_info("floppy.c: no request in request_done\n");
2321 /* maintain values for invalidation on geometry
2323 block = current_count_sectors + blk_rq_pos(req);
2324 INFBOUND(DRS->maxblock, block);
2325 if (block > _floppy->sect)
2328 /* unlock chained buffers */
2329 spin_lock_irqsave(q->queue_lock, flags);
2330 floppy_end_request(req, 0);
2331 spin_unlock_irqrestore(q->queue_lock, flags);
2333 if (rq_data_dir(req) == WRITE) {
2334 /* record write error information */
2335 DRWE->write_errors++;
2336 if (DRWE->write_errors == 1) {
2337 DRWE->first_error_sector = blk_rq_pos(req);
2338 DRWE->first_error_generation = DRS->generation;
2340 DRWE->last_error_sector = blk_rq_pos(req);
2341 DRWE->last_error_generation = DRS->generation;
2343 spin_lock_irqsave(q->queue_lock, flags);
2344 floppy_end_request(req, -EIO);
2345 spin_unlock_irqrestore(q->queue_lock, flags);
2349 /* Interrupt handler evaluating the result of the r/w operation */
2350 static void rw_interrupt(void)
2358 /* some Toshiba floppy controllers occasionnally seem to
2359 * return bogus interrupts after read/write operations, which
2360 * can be recognized by a bad head number (>= 2) */
2364 if (!DRS->first_read_date)
2365 DRS->first_read_date = jiffies;
2380 nr_sectors = (((R_TRACK - TRACK) * heads +
2381 R_HEAD - HEAD) * SECT_PER_TRACK +
2382 R_SECTOR - SECTOR + eoc) << SIZECODE >> 2;
2384 #ifdef FLOPPY_SANITY_CHECK
2385 if (nr_sectors / ssize >
2386 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) {
2387 DPRINT("long rw: %x instead of %lx\n",
2388 nr_sectors, current_count_sectors);
2389 pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR);
2390 pr_info("rh=%d h=%d\n", R_HEAD, HEAD);
2391 pr_info("rt=%d t=%d\n", R_TRACK, TRACK);
2392 pr_info("heads=%d eoc=%d\n", heads, eoc);
2393 pr_info("spt=%d st=%d ss=%d\n",
2394 SECT_PER_TRACK, fsector_t, ssize);
2395 pr_info("in_sector_offset=%d\n", in_sector_offset);
2399 nr_sectors -= in_sector_offset;
2400 INFBOUND(nr_sectors, 0);
2401 SUPBOUND(current_count_sectors, nr_sectors);
2403 switch (interpret_errors()) {
2408 if (!current_count_sectors) {
2415 if (!current_count_sectors) {
2419 current_type[current_drive] = _floppy;
2420 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2425 if (DP->flags & FTD_MSG)
2426 DPRINT("Auto-detected floppy type %s in fd%d\n",
2427 _floppy->name, current_drive);
2428 current_type[current_drive] = _floppy;
2429 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2433 if (CT(COMMAND) != FD_READ ||
2434 raw_cmd->kernel_data == current_req->buffer) {
2435 /* transfer directly from buffer */
2437 } else if (CT(COMMAND) == FD_READ) {
2438 buffer_track = raw_cmd->track;
2439 buffer_drive = current_drive;
2440 INFBOUND(buffer_max, nr_sectors + fsector_t);
2445 /* Compute maximal contiguous buffer size. */
2446 static int buffer_chain_size(void)
2450 struct req_iterator iter;
2453 base = bio_data(current_req->bio);
2456 rq_for_each_segment(bv, current_req, iter) {
2457 if (page_address(bv->bv_page) + bv->bv_offset != base + size)
2466 /* Compute the maximal transfer size */
2467 static int transfer_size(int ssize, int max_sector, int max_size)
2469 SUPBOUND(max_sector, fsector_t + max_size);
2472 max_sector -= (max_sector % _floppy->sect) % ssize;
2474 /* transfer size, beginning not aligned */
2475 current_count_sectors = max_sector - fsector_t;
2481 * Move data from/to the track buffer to/from the buffer cache.
2483 static void copy_buffer(int ssize, int max_sector, int max_sector_2)
2485 int remaining; /* number of transferred 512-byte sectors */
2490 struct req_iterator iter;
2492 max_sector = transfer_size(ssize,
2493 min(max_sector, max_sector_2),
2494 blk_rq_sectors(current_req));
2496 if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
2497 buffer_max > fsector_t + blk_rq_sectors(current_req))
2498 current_count_sectors = min_t(int, buffer_max - fsector_t,
2499 blk_rq_sectors(current_req));
2501 remaining = current_count_sectors << 9;
2502 #ifdef FLOPPY_SANITY_CHECK
2503 if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) {
2504 DPRINT("in copy buffer\n");
2505 pr_info("current_count_sectors=%ld\n", current_count_sectors);
2506 pr_info("remaining=%d\n", remaining >> 9);
2507 pr_info("current_req->nr_sectors=%u\n",
2508 blk_rq_sectors(current_req));
2509 pr_info("current_req->current_nr_sectors=%u\n",
2510 blk_rq_cur_sectors(current_req));
2511 pr_info("max_sector=%d\n", max_sector);
2512 pr_info("ssize=%d\n", ssize);
2516 buffer_max = max(max_sector, buffer_max);
2518 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
2520 size = blk_rq_cur_bytes(current_req);
2522 rq_for_each_segment(bv, current_req, iter) {
2527 SUPBOUND(size, remaining);
2529 buffer = page_address(bv->bv_page) + bv->bv_offset;
2530 #ifdef FLOPPY_SANITY_CHECK
2531 if (dma_buffer + size >
2532 floppy_track_buffer + (max_buffer_sectors << 10) ||
2533 dma_buffer < floppy_track_buffer) {
2534 DPRINT("buffer overrun in copy buffer %d\n",
2535 (int)((floppy_track_buffer - dma_buffer) >> 9));
2536 pr_info("fsector_t=%d buffer_min=%d\n",
2537 fsector_t, buffer_min);
2538 pr_info("current_count_sectors=%ld\n",
2539 current_count_sectors);
2540 if (CT(COMMAND) == FD_READ)
2542 if (CT(COMMAND) == FD_WRITE)
2546 if (((unsigned long)buffer) % 512)
2547 DPRINT("%p buffer not aligned\n", buffer);
2549 if (CT(COMMAND) == FD_READ)
2550 memcpy(buffer, dma_buffer, size);
2552 memcpy(dma_buffer, buffer, size);
2557 #ifdef FLOPPY_SANITY_CHECK
2560 max_sector -= remaining >> 9;
2561 DPRINT("weirdness: remaining %d\n", remaining >> 9);
2566 /* work around a bug in pseudo DMA
2567 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2568 * sending data. Hence we need a different way to signal the
2569 * transfer length: We use SECT_PER_TRACK. Unfortunately, this
2570 * does not work with MT, hence we can only transfer one head at
2573 static void virtualdmabug_workaround(void)
2578 if (CT(COMMAND) == FD_WRITE) {
2579 COMMAND &= ~0x80; /* switch off multiple track mode */
2581 hard_sectors = raw_cmd->length >> (7 + SIZECODE);
2582 end_sector = SECTOR + hard_sectors - 1;
2583 #ifdef FLOPPY_SANITY_CHECK
2584 if (end_sector > SECT_PER_TRACK) {
2585 pr_info("too many sectors %d > %d\n",
2586 end_sector, SECT_PER_TRACK);
2590 SECT_PER_TRACK = end_sector;
2591 /* make sure SECT_PER_TRACK
2592 * points to end of transfer */
2597 * Formulate a read/write request.
2598 * this routine decides where to load the data (directly to buffer, or to
2599 * tmp floppy area), how much data to load (the size of the buffer, the whole
2600 * track, or a single sector)
2601 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2602 * allocation on the fly, it should be done here. No other part should need
2606 static int make_raw_rw_request(void)
2608 int aligned_sector_t;
2614 if (max_buffer_sectors == 0) {
2615 pr_info("VFS: Block I/O scheduled on unopened device\n");
2619 set_fdc((long)current_req->rq_disk->private_data);
2621 raw_cmd = &default_raw_cmd;
2622 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK |
2624 raw_cmd->cmd_count = NR_RW;
2625 if (rq_data_dir(current_req) == READ) {
2626 raw_cmd->flags |= FD_RAW_READ;
2627 COMMAND = FM_MODE(_floppy, FD_READ);
2628 } else if (rq_data_dir(current_req) == WRITE) {
2629 raw_cmd->flags |= FD_RAW_WRITE;
2630 COMMAND = FM_MODE(_floppy, FD_WRITE);
2632 DPRINT("make_raw_rw_request: unknown command\n");
2636 max_sector = _floppy->sect * _floppy->head;
2638 TRACK = (int)blk_rq_pos(current_req) / max_sector;
2639 fsector_t = (int)blk_rq_pos(current_req) % max_sector;
2640 if (_floppy->track && TRACK >= _floppy->track) {
2641 if (blk_rq_cur_sectors(current_req) & 1) {
2642 current_count_sectors = 1;
2647 HEAD = fsector_t / _floppy->sect;
2649 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) ||
2650 TESTF(FD_NEED_TWADDLE)) && fsector_t < _floppy->sect)
2651 max_sector = _floppy->sect;
2653 /* 2M disks have phantom sectors on the first track */
2654 if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) {
2655 max_sector = 2 * _floppy->sect / 3;
2656 if (fsector_t >= max_sector) {
2657 current_count_sectors =
2658 min_t(int, _floppy->sect - fsector_t,
2659 blk_rq_sectors(current_req));
2664 SIZECODE = FD_SIZECODE(_floppy);
2665 raw_cmd->rate = _floppy->rate & 0x43;
2666 if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2)
2673 raw_cmd->track = TRACK << STRETCH(_floppy);
2674 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD);
2677 SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
2678 SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) +
2679 FD_SECTBASE(_floppy);
2681 /* tracksize describes the size which can be filled up with sectors
2684 tracksize = _floppy->sect - _floppy->sect % ssize;
2685 if (tracksize < _floppy->sect) {
2687 if (tracksize <= fsector_t % _floppy->sect)
2690 /* if we are beyond tracksize, fill up using smaller sectors */
2691 while (tracksize <= fsector_t % _floppy->sect) {
2692 while (tracksize + ssize > _floppy->sect) {
2700 max_sector = HEAD * _floppy->sect + tracksize;
2701 } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) {
2702 max_sector = _floppy->sect;
2703 } else if (!HEAD && CT(COMMAND) == FD_WRITE) {
2704 /* for virtual DMA bug workaround */
2705 max_sector = _floppy->sect;
2708 in_sector_offset = (fsector_t % _floppy->sect) % ssize;
2709 aligned_sector_t = fsector_t - in_sector_offset;
2710 max_size = blk_rq_sectors(current_req);
2711 if ((raw_cmd->track == buffer_track) &&
2712 (current_drive == buffer_drive) &&
2713 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
2714 /* data already in track buffer */
2715 if (CT(COMMAND) == FD_READ) {
2716 copy_buffer(1, max_sector, buffer_max);
2719 } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) {
2720 if (CT(COMMAND) == FD_WRITE) {
2721 unsigned int sectors;
2723 sectors = fsector_t + blk_rq_sectors(current_req);
2724 if (sectors > ssize && sectors < ssize + ssize)
2725 max_size = ssize + ssize;
2729 raw_cmd->flags &= ~FD_RAW_WRITE;
2730 raw_cmd->flags |= FD_RAW_READ;
2731 COMMAND = FM_MODE(_floppy, FD_READ);
2732 } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) {
2733 unsigned long dma_limit;
2734 int direct, indirect;
2737 transfer_size(ssize, max_sector,
2738 max_buffer_sectors * 2) - fsector_t;
2741 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2742 * on a 64 bit machine!
2744 max_size = buffer_chain_size();
2745 dma_limit = (MAX_DMA_ADDRESS -
2746 ((unsigned long)current_req->buffer)) >> 9;
2747 if ((unsigned long)max_size > dma_limit)
2748 max_size = dma_limit;
2749 /* 64 kb boundaries */
2750 if (CROSS_64KB(current_req->buffer, max_size << 9))
2752 ((unsigned long)current_req->buffer) %
2754 direct = transfer_size(ssize, max_sector, max_size) - fsector_t;
2756 * We try to read tracks, but if we get too many errors, we
2757 * go back to reading just one sector at a time.
2759 * This means we should be able to read a sector even if there
2760 * are other bad sectors on this track.
2763 (indirect * 2 > direct * 3 &&
2764 *errors < DP->max_errors.read_track &&
2766 (DP->read_track & (1 << DRS->probed_format)))))) {
2767 max_size = blk_rq_sectors(current_req);
2769 raw_cmd->kernel_data = current_req->buffer;
2770 raw_cmd->length = current_count_sectors << 9;
2771 if (raw_cmd->length == 0) {
2772 DPRINT("zero dma transfer attempted from make_raw_request\n");
2773 DPRINT("indirect=%d direct=%d fsector_t=%d\n",
2774 indirect, direct, fsector_t);
2777 virtualdmabug_workaround();
2782 if (CT(COMMAND) == FD_READ)
2783 max_size = max_sector; /* unbounded */
2785 /* claim buffer track if needed */
2786 if (buffer_track != raw_cmd->track || /* bad track */
2787 buffer_drive != current_drive || /* bad drive */
2788 fsector_t > buffer_max ||
2789 fsector_t < buffer_min ||
2790 ((CT(COMMAND) == FD_READ ||
2791 (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) &&
2792 max_sector > 2 * max_buffer_sectors + buffer_min &&
2793 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) {
2794 /* not enough space */
2796 buffer_drive = current_drive;
2797 buffer_max = buffer_min = aligned_sector_t;
2799 raw_cmd->kernel_data = floppy_track_buffer +
2800 ((aligned_sector_t - buffer_min) << 9);
2802 if (CT(COMMAND) == FD_WRITE) {
2803 /* copy write buffer to track buffer.
2804 * if we get here, we know that the write
2805 * is either aligned or the data already in the buffer
2806 * (buffer will be overwritten) */
2807 #ifdef FLOPPY_SANITY_CHECK
2808 if (in_sector_offset && buffer_track == -1)
2809 DPRINT("internal error offset !=0 on write\n");
2811 buffer_track = raw_cmd->track;
2812 buffer_drive = current_drive;
2813 copy_buffer(ssize, max_sector,
2814 2 * max_buffer_sectors + buffer_min);
2816 transfer_size(ssize, max_sector,
2817 2 * max_buffer_sectors + buffer_min -
2820 /* round up current_count_sectors to get dma xfer size */
2821 raw_cmd->length = in_sector_offset + current_count_sectors;
2822 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1;
2823 raw_cmd->length <<= 9;
2824 #ifdef FLOPPY_SANITY_CHECK
2825 if ((raw_cmd->length < current_count_sectors << 9) ||
2826 (raw_cmd->kernel_data != current_req->buffer &&
2827 CT(COMMAND) == FD_WRITE &&
2828 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
2829 aligned_sector_t < buffer_min)) ||
2830 raw_cmd->length % (128 << SIZECODE) ||
2831 raw_cmd->length <= 0 || current_count_sectors <= 0) {
2832 DPRINT("fractionary current count b=%lx s=%lx\n",
2833 raw_cmd->length, current_count_sectors);
2834 if (raw_cmd->kernel_data != current_req->buffer)
2835 pr_info("addr=%d, length=%ld\n",
2836 (int)((raw_cmd->kernel_data -
2837 floppy_track_buffer) >> 9),
2838 current_count_sectors);
2839 pr_info("st=%d ast=%d mse=%d msi=%d\n",
2840 fsector_t, aligned_sector_t, max_sector, max_size);
2841 pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE);
2842 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2843 COMMAND, SECTOR, HEAD, TRACK);
2844 pr_info("buffer drive=%d\n", buffer_drive);
2845 pr_info("buffer track=%d\n", buffer_track);
2846 pr_info("buffer_min=%d\n", buffer_min);
2847 pr_info("buffer_max=%d\n", buffer_max);
2851 if (raw_cmd->kernel_data != current_req->buffer) {
2852 if (raw_cmd->kernel_data < floppy_track_buffer ||
2853 current_count_sectors < 0 ||
2854 raw_cmd->length < 0 ||
2855 raw_cmd->kernel_data + raw_cmd->length >
2856 floppy_track_buffer + (max_buffer_sectors << 10)) {
2857 DPRINT("buffer overrun in schedule dma\n");
2858 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n",
2859 fsector_t, buffer_min, raw_cmd->length >> 9);
2860 pr_info("current_count_sectors=%ld\n",
2861 current_count_sectors);
2862 if (CT(COMMAND) == FD_READ)
2864 if (CT(COMMAND) == FD_WRITE)
2868 } else if (raw_cmd->length > blk_rq_bytes(current_req) ||
2869 current_count_sectors > blk_rq_sectors(current_req)) {
2870 DPRINT("buffer overrun in direct transfer\n");
2872 } else if (raw_cmd->length < current_count_sectors << 9) {
2873 DPRINT("more sectors than bytes\n");
2874 pr_info("bytes=%ld\n", raw_cmd->length >> 9);
2875 pr_info("sectors=%ld\n", current_count_sectors);
2877 if (raw_cmd->length == 0) {
2878 DPRINT("zero dma transfer attempted from make_raw_request\n");
2883 virtualdmabug_workaround();
2887 static void redo_fd_request(void)
2889 #define REPEAT {request_done(0); continue; }
2894 if (current_drive < N_DRIVE)
2895 floppy_off(current_drive);
2899 struct request *req;
2901 spin_lock_irq(floppy_queue->queue_lock);
2902 req = blk_fetch_request(floppy_queue);
2903 spin_unlock_irq(floppy_queue->queue_lock);
2911 drive = (long)current_req->rq_disk->private_data;
2913 reschedule_timeout(current_reqD, "redo fd request", 0);
2916 raw_cmd = &default_raw_cmd;
2918 if (start_motor(redo_fd_request))
2920 disk_change(current_drive);
2921 if (test_bit(current_drive, &fake_change) ||
2922 TESTF(FD_DISK_CHANGED)) {
2923 DPRINT("disk absent or changed during operation\n");
2926 if (!_floppy) { /* Autodetection */
2928 DRS->probed_format = 0;
2929 if (next_valid_format()) {
2930 DPRINT("no autodetectable formats\n");
2937 floppy_type + DP->autodetect[DRS->probed_format];
2940 errors = &(current_req->errors);
2941 tmp = make_raw_rw_request();
2947 if (TESTF(FD_NEED_TWADDLE))
2949 schedule_bh(floppy_start);
2950 debugt("queue fd request");
2956 static struct cont_t rw_cont = {
2957 .interrupt = rw_interrupt,
2958 .redo = redo_fd_request,
2959 .error = bad_flp_intr,
2960 .done = request_done
2963 static void process_fd_request(void)
2966 schedule_bh(redo_fd_request);
2969 static void do_fd_request(struct request_queue *q)
2971 if (max_buffer_sectors == 0) {
2972 pr_info("VFS: do_fd_request called on non-open device\n");
2976 if (usage_count == 0) {
2977 pr_info("warning: usage count=0, current_req=%p exiting\n",
2979 pr_info("sect=%ld type=%x flags=%x\n",
2980 (long)blk_rq_pos(current_req), current_req->cmd_type,
2981 current_req->cmd_flags);
2984 if (test_bit(0, &fdc_busy)) {
2985 /* fdc busy, this new request will be treated when the
2986 current one is done */
2987 is_alive("do fd request, old request running");
2990 lock_fdc(MAXTIMEOUT, 0);
2991 process_fd_request();
2992 is_alive("do fd request");
2995 static struct cont_t poll_cont = {
2996 .interrupt = success_and_wakeup,
2997 .redo = floppy_ready,
2998 .error = generic_failure,
2999 .done = generic_done
3002 static int poll_drive(int interruptible, int flag)
3006 /* no auto-sense, just clear dcl */
3007 raw_cmd = &default_raw_cmd;
3008 raw_cmd->flags = flag;
3010 raw_cmd->cmd_count = 0;
3012 debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n");
3013 SETF(FD_DISK_NEWCHANGE);
3019 * User triggered reset
3020 * ====================
3023 static void reset_intr(void)
3025 pr_info("weird, reset interrupt called\n");
3028 static struct cont_t reset_cont = {
3029 .interrupt = reset_intr,
3030 .redo = success_and_wakeup,
3031 .error = generic_failure,
3032 .done = generic_done
3035 static int user_reset_fdc(int drive, int arg, int interruptible)
3039 if (lock_fdc(drive, interruptible))
3042 if (arg == FD_RESET_ALWAYS)
3048 process_fd_request();
3053 * Misc Ioctl's and support
3054 * ========================
3056 static inline int fd_copyout(void __user *param, const void *address,
3059 return copy_to_user(param, address, size) ? -EFAULT : 0;
3062 static inline int fd_copyin(void __user *param, void *address,
3065 return copy_from_user(address, param, size) ? -EFAULT : 0;
3068 #define _COPYOUT(x) (copy_to_user((void __user *)param, &(x), sizeof(x)) \
3070 #define _COPYIN(x) (copy_from_user(&(x), (void __user *)param, sizeof(x)) \
3073 #define COPYOUT(x) ECALL(_COPYOUT(x))
3074 #define COPYIN(x) ECALL(_COPYIN(x))
3076 static inline const char *drive_name(int type, int drive)
3078 struct floppy_struct *floppy;
3081 floppy = floppy_type + type;
3083 if (UDP->native_format)
3084 floppy = floppy_type + UDP->native_format;
3089 return floppy->name;
3095 static void raw_cmd_done(int flag)
3100 raw_cmd->flags |= FD_RAW_FAILURE;
3101 raw_cmd->flags |= FD_RAW_HARDFAILURE;
3103 raw_cmd->reply_count = inr;
3104 if (raw_cmd->reply_count > MAX_REPLIES)
3105 raw_cmd->reply_count = 0;
3106 for (i = 0; i < raw_cmd->reply_count; i++)
3107 raw_cmd->reply[i] = reply_buffer[i];
3109 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3110 unsigned long flags;
3111 flags = claim_dma_lock();
3112 raw_cmd->length = fd_get_dma_residue();
3113 release_dma_lock(flags);
3116 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
3117 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
3118 raw_cmd->flags |= FD_RAW_FAILURE;
3120 if (disk_change(current_drive))
3121 raw_cmd->flags |= FD_RAW_DISK_CHANGE;
3123 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
3124 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
3125 motor_off_callback(current_drive);
3127 if (raw_cmd->next &&
3128 (!(raw_cmd->flags & FD_RAW_FAILURE) ||
3129 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
3130 ((raw_cmd->flags & FD_RAW_FAILURE) ||
3131 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) {
3132 raw_cmd = raw_cmd->next;
3139 static struct cont_t raw_cmd_cont = {
3140 .interrupt = success_and_wakeup,
3141 .redo = floppy_start,
3142 .error = generic_failure,
3143 .done = raw_cmd_done
3146 static inline int raw_cmd_copyout(int cmd, char __user *param,
3147 struct floppy_raw_cmd *ptr)
3153 param += sizeof(struct floppy_raw_cmd);
3154 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) {
3155 if (ptr->length >= 0 &&
3156 ptr->length <= ptr->buffer_length) {
3157 long length = ptr->buffer_length - ptr->length;
3158 ECALL(fd_copyout(ptr->data, ptr->kernel_data,
3167 static void raw_cmd_free(struct floppy_raw_cmd **ptr)
3169 struct floppy_raw_cmd *next;
3170 struct floppy_raw_cmd *this;
3175 if (this->buffer_length) {
3176 fd_dma_mem_free((unsigned long)this->kernel_data,
3177 this->buffer_length);
3178 this->buffer_length = 0;
3186 static inline int raw_cmd_copyin(int cmd, char __user *param,
3187 struct floppy_raw_cmd **rcmd)
3189 struct floppy_raw_cmd *ptr;
3195 ptr = (struct floppy_raw_cmd *)
3196 kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
3202 ptr->buffer_length = 0;
3203 param += sizeof(struct floppy_raw_cmd);
3204 if (ptr->cmd_count > 33)
3205 /* the command may now also take up the space
3206 * initially intended for the reply & the
3207 * reply count. Needed for long 82078 commands
3208 * such as RESTORE, which takes ... 17 command
3209 * bytes. Murphy's law #137: When you reserve
3210 * 16 bytes for a structure, you'll one day
3211 * discover that you really need 17...
3215 for (i = 0; i < 16; i++)
3217 ptr->resultcode = 0;
3218 ptr->kernel_data = NULL;
3220 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3221 if (ptr->length <= 0)
3224 (char *)fd_dma_mem_alloc(ptr->length);
3225 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
3226 if (!ptr->kernel_data)
3228 ptr->buffer_length = ptr->length;
3230 if (ptr->flags & FD_RAW_WRITE)
3231 ECALL(fd_copyin(ptr->data, ptr->kernel_data,
3233 rcmd = &(ptr->next);
3234 if (!(ptr->flags & FD_RAW_MORE))
3240 static int raw_cmd_ioctl(int cmd, void __user *param)
3242 struct floppy_raw_cmd *my_raw_cmd;
3247 if (FDCS->rawcmd <= 1)
3249 for (drive = 0; drive < N_DRIVE; drive++) {
3250 if (FDC(drive) != fdc)
3252 if (drive == current_drive) {
3253 if (UDRS->fd_ref > 1) {
3257 } else if (UDRS->fd_ref) {
3266 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
3268 raw_cmd_free(&my_raw_cmd);
3272 raw_cmd = my_raw_cmd;
3273 cont = &raw_cmd_cont;
3274 ret = wait_til_done(floppy_start, 1);
3275 debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n");
3277 if (ret != -EINTR && FDCS->reset)
3280 DRS->track = NO_TRACK;
3282 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
3285 raw_cmd_free(&my_raw_cmd);
3289 static int invalidate_drive(struct block_device *bdev)
3291 /* invalidate the buffer track to force a reread */
3292 set_bit((long)bdev->bd_disk->private_data, &fake_change);
3293 process_fd_request();
3294 check_disk_change(bdev);
3298 static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
3299 int drive, int type, struct block_device *bdev)
3303 /* sanity checking for parameters. */
3306 g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) ||
3307 /* check if reserved bits are set */
3308 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0)
3311 if (!capable(CAP_SYS_ADMIN))
3313 mutex_lock(&open_lock);
3314 if (lock_fdc(drive, 1)) {
3315 mutex_unlock(&open_lock);
3318 floppy_type[type] = *g;
3319 floppy_type[type].name = "user format";
3320 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
3321 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] =
3322 floppy_type[type].size + 1;
3323 process_fd_request();
3324 for (cnt = 0; cnt < N_DRIVE; cnt++) {
3325 struct block_device *bdev = opened_bdev[cnt];
3326 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
3328 __invalidate_device(bdev);
3330 mutex_unlock(&open_lock);
3334 if (lock_fdc(drive, 1))
3336 if (cmd != FDDEFPRM)
3337 /* notice a disk change immediately, else
3338 * we lose our settings immediately*/
3339 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3340 oldStretch = g->stretch;
3341 user_params[drive] = *g;
3342 if (buffer_drive == drive)
3343 SUPBOUND(buffer_max, user_params[drive].sect);
3344 current_type[drive] = &user_params[drive];
3345 floppy_sizes[drive] = user_params[drive].size;
3346 if (cmd == FDDEFPRM)
3347 DRS->keep_data = -1;
3350 /* invalidation. Invalidate only when needed, i.e.
3351 * when there are already sectors in the buffer cache
3352 * whose number will change. This is useful, because
3353 * mtools often changes the geometry of the disk after
3354 * looking at the boot block */
3355 if (DRS->maxblock > user_params[drive].sect ||
3357 ((user_params[drive].sect ^ oldStretch) &
3358 (FD_SWAPSIDES | FD_SECTBASEMASK)))
3359 invalidate_drive(bdev);
3361 process_fd_request();
3366 /* handle obsolete ioctl's */
3367 static int ioctl_table[] = {
3395 static inline int normalize_ioctl(int *cmd, int *size)
3399 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) {
3400 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) {
3401 *size = _IOC_SIZE(*cmd);
3402 *cmd = ioctl_table[i];
3403 if (*size > _IOC_SIZE(*cmd)) {
3404 pr_info("ioctl not yet supported\n");
3413 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
3416 *g = &floppy_type[type];
3418 if (lock_fdc(drive, 0))
3420 CALL(poll_drive(0, 0));
3421 process_fd_request();
3422 *g = current_type[drive];
3429 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
3431 int drive = (long)bdev->bd_disk->private_data;
3432 int type = ITYPE(drive_state[drive].fd_device);
3433 struct floppy_struct *g;
3436 ret = get_floppy_geometry(drive, type, &g);
3440 geo->heads = g->head;
3441 geo->sectors = g->sect;
3442 geo->cylinders = g->track;
3446 static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3447 unsigned long param)
3449 #define FD_IOCTL_ALLOWED (mode & (FMODE_WRITE|FMODE_WRITE_IOCTL))
3451 int drive = (long)bdev->bd_disk->private_data;
3452 int type = ITYPE(UDRS->fd_device);
3457 struct floppy_struct g; /* geometry */
3458 struct format_descr f;
3459 struct floppy_max_errors max_errors;
3460 struct floppy_drive_params dp;
3461 } inparam; /* parameters coming from user space */
3462 const char *outparam; /* parameters passed back to user space */
3464 /* convert compatibility eject ioctls into floppy eject ioctl.
3465 * We do this in order to provide a means to eject floppy disks before
3466 * installing the new fdutils package */
3467 if (cmd == CDROMEJECT || /* CD-ROM eject */
3468 cmd == 0x6470) { /* SunOS floppy eject */
3469 DPRINT("obsolete eject ioctl\n");
3470 DPRINT("please use floppycontrol --eject\n");
3474 if (!((cmd & 0xff00) == 0x0200))
3477 /* convert the old style command into a new style command */
3478 ECALL(normalize_ioctl(&cmd, &size));
3480 /* permission checks */
3481 if (((cmd & 0x40) && !FD_IOCTL_ALLOWED) ||
3482 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
3485 if (WARN_ON(size < 0 || size > sizeof(inparam)))
3489 memset(&inparam, 0, sizeof(inparam));
3490 if (_IOC_DIR(cmd) & _IOC_WRITE)
3491 ECALL(fd_copyin((void __user *)param, &inparam, size));
3495 if (UDRS->fd_ref != 1)
3496 /* somebody else has this drive open */
3498 if (lock_fdc(drive, 1))
3501 /* do the actual eject. Fails on
3502 * non-Sparc architectures */
3503 ret = fd_eject(UNIT(drive));
3505 USETF(FD_DISK_CHANGED);
3507 process_fd_request();
3510 if (lock_fdc(drive, 1))
3512 current_type[drive] = NULL;
3513 floppy_sizes[drive] = MAX_DISK_SIZE << 1;
3514 UDRS->keep_data = 0;
3515 return invalidate_drive(bdev);
3518 return set_geometry(cmd, &inparam.g, drive, type, bdev);
3520 ECALL(get_floppy_geometry(drive, type,
3521 (struct floppy_struct **)
3525 UDP->flags |= FTD_MSG;
3528 UDP->flags &= ~FTD_MSG;
3531 if (lock_fdc(drive, 1))
3533 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3535 process_fd_request();
3536 if (ret & FD_VERIFY)
3538 if (!(ret & FD_DISK_WRITABLE))
3542 if (UDRS->fd_ref != 1)
3544 return do_format(drive, &inparam.f);
3547 if (lock_fdc(drive, 1))
3549 return invalidate_drive(bdev);
3550 case FDSETEMSGTRESH:
3551 UDP->max_errors.reporting = (unsigned short)(param & 0x0f);
3554 outparam = (const char *)&UDP->max_errors;
3557 UDP->max_errors = inparam.max_errors;
3560 outparam = drive_name(type, drive);
3561 SUPBOUND(size, strlen(outparam) + 1);
3567 outparam = (const char *)UDP;
3570 if (lock_fdc(drive, 1))
3572 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3573 process_fd_request();
3576 outparam = (const char *)UDRS;
3579 return user_reset_fdc(drive, (int)param, 1);
3581 outparam = (const char *)UFDCS;
3584 memset(UDRWE, 0, sizeof(*UDRWE));
3587 outparam = (const char *)UDRWE;
3592 if (lock_fdc(drive, 1))
3595 CALL(i = raw_cmd_ioctl(cmd, (void __user *)param));
3596 process_fd_request();
3599 if (lock_fdc(drive, 1))
3602 process_fd_request();
3608 if (_IOC_DIR(cmd) & _IOC_READ)
3609 return fd_copyout((void __user *)param, outparam, size);
3614 static void __init config_types(void)
3616 bool has_drive = false;
3619 /* read drive info out of physical CMOS */
3622 UDP->cmos = FLOPPY0_TYPE;
3624 if (!UDP->cmos && FLOPPY1_TYPE)
3625 UDP->cmos = FLOPPY1_TYPE;
3627 /* FIXME: additional physical CMOS drive detection should go here */
3629 for (drive = 0; drive < N_DRIVE; drive++) {
3630 unsigned int type = UDP->cmos;
3631 struct floppy_drive_params *params;
3632 const char *name = NULL;
3633 static char temparea[32];
3635 if (type < ARRAY_SIZE(default_drive_params)) {
3636 params = &default_drive_params[type].params;
3638 name = default_drive_params[type].name;
3639 allowed_drive_mask |= 1 << drive;
3641 allowed_drive_mask &= ~(1 << drive);
3643 params = &default_drive_params[0].params;
3644 sprintf(temparea, "unknown type %d (usb?)", type);
3648 const char *prepend;
3652 pr_info("Floppy drive(s):");
3657 pr_cont("%s fd%d is %s", prepend, drive, name);
3666 static int floppy_release(struct gendisk *disk, fmode_t mode)
3668 int drive = (long)disk->private_data;
3670 mutex_lock(&open_lock);
3671 if (UDRS->fd_ref < 0)
3673 else if (!UDRS->fd_ref--) {
3674 DPRINT("floppy_release with fd_ref == 0");
3678 opened_bdev[drive] = NULL;
3679 mutex_unlock(&open_lock);
3685 * floppy_open check for aliasing (/dev/fd0 can be the same as
3686 * /dev/PS0 etc), and disallows simultaneous access to the same
3687 * drive with different device numbers.
3689 static int floppy_open(struct block_device *bdev, fmode_t mode)
3691 int drive = (long)bdev->bd_disk->private_data;
3692 int old_dev, new_dev;
3697 mutex_lock(&open_lock);
3698 old_dev = UDRS->fd_device;
3699 if (opened_bdev[drive] && opened_bdev[drive] != bdev)
3702 if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) {
3703 USETF(FD_DISK_CHANGED);
3707 if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL)))
3710 if (mode & FMODE_EXCL)
3715 opened_bdev[drive] = bdev;
3719 if (!floppy_track_buffer) {
3720 /* if opening an ED drive, reserve a big buffer,
3721 * else reserve a small one */
3722 if ((UDP->cmos == 6) || (UDP->cmos == 5))
3723 try = 64; /* Only 48 actually useful */
3725 try = 32; /* Only 24 actually useful */
3727 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3728 if (!tmp && !floppy_track_buffer) {
3729 try >>= 1; /* buffer only one side */
3731 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3733 if (!tmp && !floppy_track_buffer)
3734 fallback_on_nodma_alloc(&tmp, 2048 * try);
3735 if (!tmp && !floppy_track_buffer) {
3736 DPRINT("Unable to allocate DMA memory\n");
3739 if (floppy_track_buffer) {
3741 fd_dma_mem_free((unsigned long)tmp, try * 1024);
3743 buffer_min = buffer_max = -1;
3744 floppy_track_buffer = tmp;
3745 max_buffer_sectors = try;
3749 new_dev = MINOR(bdev->bd_dev);
3750 UDRS->fd_device = new_dev;
3751 set_capacity(disks[drive], floppy_sizes[new_dev]);
3752 if (old_dev != -1 && old_dev != new_dev) {
3753 if (buffer_drive == drive)
3757 if (UFDCS->rawcmd == 1)
3760 if (!(mode & FMODE_NDELAY)) {
3761 if (mode & (FMODE_READ|FMODE_WRITE)) {
3762 UDRS->last_checked = 0;
3763 check_disk_change(bdev);
3764 if (UTESTF(FD_DISK_CHANGED))
3768 if ((mode & FMODE_WRITE) && !(UTESTF(FD_DISK_WRITABLE)))
3771 mutex_unlock(&open_lock);
3774 if (UDRS->fd_ref < 0)
3779 opened_bdev[drive] = NULL;
3781 mutex_unlock(&open_lock);
3786 * Check if the disk has been changed or if a change has been faked.
3788 static int check_floppy_change(struct gendisk *disk)
3790 int drive = (long)disk->private_data;
3792 if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY))
3795 if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) {
3798 process_fd_request();
3801 if (UTESTF(FD_DISK_CHANGED) ||
3802 UTESTF(FD_VERIFY) ||
3803 test_bit(drive, &fake_change) ||
3804 (!ITYPE(UDRS->fd_device) && !current_type[drive]))
3810 * This implements "read block 0" for floppy_revalidate().
3811 * Needed for format autodetection, checking whether there is
3812 * a disk in the drive, and whether that disk is writable.
3815 static void floppy_rb0_complete(struct bio *bio, int err)
3817 complete((struct completion *)bio->bi_private);
3820 static int __floppy_read_block_0(struct block_device *bdev)
3823 struct bio_vec bio_vec;
3824 struct completion complete;
3828 page = alloc_page(GFP_NOIO);
3830 process_fd_request();
3834 size = bdev->bd_block_size;
3839 bio.bi_io_vec = &bio_vec;
3840 bio_vec.bv_page = page;
3841 bio_vec.bv_len = size;
3842 bio_vec.bv_offset = 0;
3848 init_completion(&complete);
3849 bio.bi_private = &complete;
3850 bio.bi_end_io = floppy_rb0_complete;
3852 submit_bio(READ, &bio);
3853 generic_unplug_device(bdev_get_queue(bdev));
3854 process_fd_request();
3855 wait_for_completion(&complete);
3862 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
3863 * the bootblock (block 0). "Autodetection" is also needed to check whether
3864 * there is a disk in the drive at all... Thus we also do it for fixed
3865 * geometry formats */
3866 static int floppy_revalidate(struct gendisk *disk)
3868 int drive = (long)disk->private_data;
3869 #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device))
3873 if (UTESTF(FD_DISK_CHANGED) ||
3874 UTESTF(FD_VERIFY) || test_bit(drive, &fake_change) || NO_GEOM) {
3875 if (usage_count == 0) {
3876 pr_info("VFS: revalidate called on non-open device.\n");
3880 cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY);
3881 if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)) {
3882 process_fd_request(); /*already done by another thread */
3887 if (buffer_drive == drive)
3889 clear_bit(drive, &fake_change);
3890 UCLEARF(FD_DISK_CHANGED);
3895 res = __floppy_read_block_0(opened_bdev[drive]);
3898 poll_drive(0, FD_RAW_NEED_DISK);
3899 process_fd_request();
3902 set_capacity(disk, floppy_sizes[UDRS->fd_device]);
3906 static const struct block_device_operations floppy_fops = {
3907 .owner = THIS_MODULE,
3908 .open = floppy_open,
3909 .release = floppy_release,
3910 .locked_ioctl = fd_ioctl,
3911 .getgeo = fd_getgeo,
3912 .media_changed = check_floppy_change,
3913 .revalidate_disk = floppy_revalidate,
3917 * Floppy Driver initialization
3918 * =============================
3921 /* Determine the floppy disk controller type */
3922 /* This routine was written by David C. Niemi */
3923 static char __init get_fdc_version(void)
3927 output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */
3932 return FDC_NONE; /* No FDC present ??? */
3933 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3934 pr_info("FDC %d is an 8272A\n", fdc);
3935 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
3938 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
3943 if (!fdc_configure()) {
3944 pr_info("FDC %d is an 82072\n", fdc);
3945 return FDC_82072; /* 82072 doesn't know CONFIGURE */
3948 output_byte(FD_PERPENDICULAR);
3949 if (need_more_output() == MORE_OUTPUT) {
3952 pr_info("FDC %d is an 82072A\n", fdc);
3953 return FDC_82072A; /* 82072A as found on Sparcs. */
3956 output_byte(FD_UNLOCK);
3958 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3959 pr_info("FDC %d is a pre-1991 82077\n", fdc);
3960 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
3963 if ((r != 1) || (reply_buffer[0] != 0x00)) {
3964 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
3968 output_byte(FD_PARTID);
3971 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
3975 if (reply_buffer[0] == 0x80) {
3976 pr_info("FDC %d is a post-1991 82077\n", fdc);
3977 return FDC_82077; /* Revised 82077AA passes all the tests */
3979 switch (reply_buffer[0] >> 5) {
3981 /* Either a 82078-1 or a 82078SL running at 5Volt */
3982 pr_info("FDC %d is an 82078.\n", fdc);
3985 pr_info("FDC %d is a 44pin 82078\n", fdc);
3988 pr_info("FDC %d is a S82078B\n", fdc);
3991 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc);
3994 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n",
3995 fdc, reply_buffer[0] >> 5);
3996 return FDC_82078_UNKN;
3998 } /* get_fdc_version */
4000 /* lilo configuration */
4002 static void __init floppy_set_flags(int *ints, int param, int param2)
4006 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4008 default_drive_params[i].params.flags |= param2;
4010 default_drive_params[i].params.flags &= ~param2;
4012 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param);
4015 static void __init daring(int *ints, int param, int param2)
4019 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4021 default_drive_params[i].params.select_delay = 0;
4022 default_drive_params[i].params.flags |=
4023 FD_SILENT_DCL_CLEAR;
4025 default_drive_params[i].params.select_delay =
4027 default_drive_params[i].params.flags &=
4028 ~FD_SILENT_DCL_CLEAR;
4031 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken");
4034 static void __init set_cmos(int *ints, int dummy, int dummy2)
4036 int current_drive = 0;
4039 DPRINT("wrong number of parameters for CMOS\n");
4042 current_drive = ints[1];
4043 if (current_drive < 0 || current_drive >= 8) {
4044 DPRINT("bad drive for set_cmos\n");
4048 if (current_drive >= 4 && !FDC2)
4052 DPRINT("setting CMOS code to %d\n", ints[2]);
4055 static struct param_table {
4057 void (*fn) (int *ints, int param, int param2);
4061 } config_params[] __initdata = {
4062 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4063 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4064 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0},
4065 {"irq", NULL, &FLOPPY_IRQ, 6, 0},
4066 {"dma", NULL, &FLOPPY_DMA, 2, 0},
4067 {"daring", daring, NULL, 1, 0},
4069 {"two_fdc", NULL, &FDC2, 0x370, 0},
4070 {"one_fdc", NULL, &FDC2, 0, 0},
4072 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL},
4073 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL},
4074 {"messages", floppy_set_flags, NULL, 1, FTD_MSG},
4075 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR},
4076 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG},
4077 {"nodma", NULL, &can_use_virtual_dma, 1, 0},
4078 {"omnibook", NULL, &can_use_virtual_dma, 1, 0},
4079 {"yesdma", NULL, &can_use_virtual_dma, 0, 0},
4080 {"fifo_depth", NULL, &fifo_depth, 0xa, 0},
4081 {"nofifo", NULL, &no_fifo, 0x20, 0},
4082 {"usefifo", NULL, &no_fifo, 0, 0},
4083 {"cmos", set_cmos, NULL, 0, 0},
4084 {"slow", NULL, &slow_floppy, 1, 0},
4085 {"unexpected_interrupts", NULL, &print_unex, 1, 0},
4086 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0},
4087 {"L40SX", NULL, &print_unex, 0, 0}
4092 static int __init floppy_setup(char *str)
4098 str = get_options(str, ARRAY_SIZE(ints), ints);
4100 for (i = 0; i < ARRAY_SIZE(config_params); i++) {
4101 if (strcmp(str, config_params[i].name) == 0) {
4105 param = config_params[i].def_param;
4106 if (config_params[i].fn)
4107 config_params[i].fn(ints, param,
4110 if (config_params[i].var) {
4111 DPRINT("%s=%d\n", str, param);
4112 *config_params[i].var = param;
4119 DPRINT("unknown floppy option [%s]\n", str);
4121 DPRINT("allowed options are:");
4122 for (i = 0; i < ARRAY_SIZE(config_params); i++)
4123 pr_cont(" %s", config_params[i].name);
4126 DPRINT("botched floppy option\n");
4127 DPRINT("Read Documentation/blockdev/floppy.txt\n");
4131 static int have_no_fdc = -ENODEV;
4133 static ssize_t floppy_cmos_show(struct device *dev,
4134 struct device_attribute *attr, char *buf)
4136 struct platform_device *p = to_platform_device(dev);
4140 return sprintf(buf, "%X\n", UDP->cmos);
4143 DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL);
4145 static void floppy_device_release(struct device *dev)
4149 static int floppy_resume(struct device *dev)
4153 for (fdc = 0; fdc < N_FDC; fdc++)
4154 if (FDCS->address != -1)
4155 user_reset_fdc(-1, FD_RESET_ALWAYS, 0);
4160 static const struct dev_pm_ops floppy_pm_ops = {
4161 .resume = floppy_resume,
4162 .restore = floppy_resume,
4165 static struct platform_driver floppy_driver = {
4168 .pm = &floppy_pm_ops,
4172 static struct platform_device floppy_device[N_DRIVE];
4174 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
4176 int drive = (*part & 3) | ((*part & 0x80) >> 5);
4177 if (drive >= N_DRIVE ||
4178 !(allowed_drive_mask & (1 << drive)) ||
4179 fdc_state[FDC(drive)].version == FDC_NONE)
4181 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type))
4184 return get_disk(disks[drive]);
4187 static int __init floppy_init(void)
4192 #if defined(CONFIG_PPC)
4193 if (check_legacy_ioport(FDC1))
4199 for (dr = 0; dr < N_DRIVE; dr++) {
4200 disks[dr] = alloc_disk(1);
4206 disks[dr]->major = FLOPPY_MAJOR;
4207 disks[dr]->first_minor = TOMINOR(dr);
4208 disks[dr]->fops = &floppy_fops;
4209 sprintf(disks[dr]->disk_name, "fd%d", dr);
4211 init_timer(&motor_off_timer[dr]);
4212 motor_off_timer[dr].data = dr;
4213 motor_off_timer[dr].function = motor_off_callback;
4216 err = register_blkdev(FLOPPY_MAJOR, "fd");
4220 err = platform_driver_register(&floppy_driver);
4222 goto out_unreg_blkdev;
4224 floppy_queue = blk_init_queue(do_fd_request, &floppy_lock);
4225 if (!floppy_queue) {
4227 goto out_unreg_driver;
4229 blk_queue_max_hw_sectors(floppy_queue, 64);
4231 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
4232 floppy_find, NULL, NULL);
4234 for (i = 0; i < 256; i++)
4236 floppy_sizes[i] = floppy_type[ITYPE(i)].size;
4238 floppy_sizes[i] = MAX_DISK_SIZE << 1;
4240 reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT);
4243 for (i = 0; i < N_FDC; i++) {
4245 memset(FDCS, 0, sizeof(*FDCS));
4248 #if defined(__sparc__) || defined(__mc68000__)
4249 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4253 FDCS->version = FDC_82072A;
4257 use_virtual_dma = can_use_virtual_dma & 1;
4258 fdc_state[0].address = FDC1;
4259 if (fdc_state[0].address == -1) {
4260 del_timer(&fd_timeout);
4262 goto out_unreg_region;
4265 fdc_state[1].address = FDC2;
4268 fdc = 0; /* reset fdc in case of unexpected interrupt */
4269 err = floppy_grab_irq_and_dma();
4271 del_timer(&fd_timeout);
4273 goto out_unreg_region;
4276 /* initialise drive state */
4277 for (drive = 0; drive < N_DRIVE; drive++) {
4278 memset(UDRS, 0, sizeof(*UDRS));
4279 memset(UDRWE, 0, sizeof(*UDRWE));
4280 USETF(FD_DISK_NEWCHANGE);
4281 USETF(FD_DISK_CHANGED);
4283 UDRS->fd_device = -1;
4284 floppy_track_buffer = NULL;
4285 max_buffer_sectors = 0;
4288 * Small 10 msec delay to let through any interrupt that
4289 * initialization might have triggered, to not
4290 * confuse detection:
4294 for (i = 0; i < N_FDC; i++) {
4296 FDCS->driver_version = FD_DRIVER_VERSION;
4297 for (unit = 0; unit < 4; unit++)
4298 FDCS->track[unit] = 0;
4299 if (FDCS->address == -1)
4302 if (user_reset_fdc(-1, FD_RESET_ALWAYS, 0)) {
4303 /* free ioports reserved by floppy_grab_irq_and_dma() */
4304 floppy_release_regions(fdc);
4306 FDCS->version = FDC_NONE;
4309 /* Try to determine the floppy controller type */
4310 FDCS->version = get_fdc_version();
4311 if (FDCS->version == FDC_NONE) {
4312 /* free ioports reserved by floppy_grab_irq_and_dma() */
4313 floppy_release_regions(fdc);
4317 if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A)
4318 can_use_virtual_dma = 0;
4321 /* Not all FDCs seem to be able to handle the version command
4322 * properly, so force a reset for the standard FDC clones,
4323 * to avoid interrupt garbage.
4325 user_reset_fdc(-1, FD_RESET_ALWAYS, 0);
4328 del_timer(&fd_timeout);
4332 DPRINT("no floppy controllers found\n");
4334 goto out_flush_work;
4337 for (drive = 0; drive < N_DRIVE; drive++) {
4338 if (!(allowed_drive_mask & (1 << drive)))
4340 if (fdc_state[FDC(drive)].version == FDC_NONE)
4343 floppy_device[drive].name = floppy_device_name;
4344 floppy_device[drive].id = drive;
4345 floppy_device[drive].dev.release = floppy_device_release;
4347 err = platform_device_register(&floppy_device[drive]);
4349 goto out_flush_work;
4351 err = device_create_file(&floppy_device[drive].dev,
4354 goto out_unreg_platform_dev;
4356 /* to be cleaned up... */
4357 disks[drive]->private_data = (void *)(long)drive;
4358 disks[drive]->queue = floppy_queue;
4359 disks[drive]->flags |= GENHD_FL_REMOVABLE;
4360 disks[drive]->driverfs_dev = &floppy_device[drive].dev;
4361 add_disk(disks[drive]);
4366 out_unreg_platform_dev:
4367 platform_device_unregister(&floppy_device[drive]);
4369 flush_scheduled_work();
4371 floppy_release_irq_and_dma();
4373 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4374 blk_cleanup_queue(floppy_queue);
4376 platform_driver_unregister(&floppy_driver);
4378 unregister_blkdev(FLOPPY_MAJOR, "fd");
4381 del_timer(&motor_off_timer[dr]);
4382 put_disk(disks[dr]);
4387 static DEFINE_SPINLOCK(floppy_usage_lock);
4389 static const struct io_region {
4394 /* address + 3 is sometimes reserved by pnp bios for motherboard */
4396 /* address + 6 is reserved, and may be taken by IDE.
4397 * Unfortunately, Adaptec doesn't know this :-(, */
4401 static void floppy_release_allocated_regions(int fdc, const struct io_region *p)
4403 while (p != io_regions) {
4405 release_region(FDCS->address + p->offset, p->size);
4409 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
4411 static int floppy_request_regions(int fdc)
4413 const struct io_region *p;
4415 for (p = io_regions; p < ARRAY_END(io_regions); p++) {
4416 if (!request_region(FDCS->address + p->offset,
4417 p->size, "floppy")) {
4418 DPRINT("Floppy io-port 0x%04lx in use\n",
4419 FDCS->address + p->offset);
4420 floppy_release_allocated_regions(fdc, p);
4427 static void floppy_release_regions(int fdc)
4429 floppy_release_allocated_regions(fdc, ARRAY_END(io_regions));
4432 static int floppy_grab_irq_and_dma(void)
4434 unsigned long flags;
4436 spin_lock_irqsave(&floppy_usage_lock, flags);
4437 if (usage_count++) {
4438 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4441 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4444 * We might have scheduled a free_irq(), wait it to
4447 flush_scheduled_work();
4449 if (fd_request_irq()) {
4450 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4452 spin_lock_irqsave(&floppy_usage_lock, flags);
4454 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4457 if (fd_request_dma()) {
4458 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4460 if (can_use_virtual_dma & 2)
4461 use_virtual_dma = can_use_virtual_dma = 1;
4462 if (!(can_use_virtual_dma & 1)) {
4464 spin_lock_irqsave(&floppy_usage_lock, flags);
4466 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4471 for (fdc = 0; fdc < N_FDC; fdc++) {
4472 if (FDCS->address != -1) {
4473 if (floppy_request_regions(fdc))
4477 for (fdc = 0; fdc < N_FDC; fdc++) {
4478 if (FDCS->address != -1) {
4480 fd_outb(FDCS->dor, FD_DOR);
4484 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4486 for (fdc = 0; fdc < N_FDC; fdc++)
4487 if (FDCS->address != -1)
4488 fd_outb(FDCS->dor, FD_DOR);
4490 * The driver will try and free resources and relies on us
4491 * to know if they were allocated or not.
4494 irqdma_allocated = 1;
4500 floppy_release_regions(fdc);
4501 spin_lock_irqsave(&floppy_usage_lock, flags);
4503 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4507 static void floppy_release_irq_and_dma(void)
4510 #ifdef FLOPPY_SANITY_CHECK
4516 unsigned long tmpaddr;
4517 unsigned long flags;
4519 spin_lock_irqsave(&floppy_usage_lock, flags);
4520 if (--usage_count) {
4521 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4524 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4525 if (irqdma_allocated) {
4529 irqdma_allocated = 0;
4535 floppy_enable_hlt();
4537 if (floppy_track_buffer && max_buffer_sectors) {
4538 tmpsize = max_buffer_sectors * 1024;
4539 tmpaddr = (unsigned long)floppy_track_buffer;
4540 floppy_track_buffer = NULL;
4541 max_buffer_sectors = 0;
4542 buffer_min = buffer_max = -1;
4543 fd_dma_mem_free(tmpaddr, tmpsize);
4545 #ifdef FLOPPY_SANITY_CHECK
4547 for (drive = 0; drive < N_FDC * 4; drive++)
4548 if (timer_pending(motor_off_timer + drive))
4549 pr_info("motor off timer %d still active\n", drive);
4552 if (timer_pending(&fd_timeout))
4553 pr_info("floppy timer still active:%s\n", timeout_message);
4554 if (timer_pending(&fd_timer))
4555 pr_info("auxiliary floppy timer still active\n");
4556 if (work_pending(&floppy_work))
4557 pr_info("work still pending\n");
4560 for (fdc = 0; fdc < N_FDC; fdc++)
4561 if (FDCS->address != -1)
4562 floppy_release_regions(fdc);
4568 static char *floppy;
4570 static void __init parse_floppy_cfg_string(char *cfg)
4576 while (*cfg && *cfg != ' ' && *cfg != '\t')
4587 static int __init floppy_module_init(void)
4590 parse_floppy_cfg_string(floppy);
4591 return floppy_init();
4593 module_init(floppy_module_init);
4595 static void __exit floppy_module_exit(void)
4599 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4600 unregister_blkdev(FLOPPY_MAJOR, "fd");
4601 platform_driver_unregister(&floppy_driver);
4603 for (drive = 0; drive < N_DRIVE; drive++) {
4604 del_timer_sync(&motor_off_timer[drive]);
4606 if ((allowed_drive_mask & (1 << drive)) &&
4607 fdc_state[FDC(drive)].version != FDC_NONE) {
4608 del_gendisk(disks[drive]);
4609 device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
4610 platform_device_unregister(&floppy_device[drive]);
4612 put_disk(disks[drive]);
4615 del_timer_sync(&fd_timeout);
4616 del_timer_sync(&fd_timer);
4617 blk_cleanup_queue(floppy_queue);
4620 floppy_release_irq_and_dma();
4622 /* eject disk, if any */
4626 module_exit(floppy_module_exit);
4628 module_param(floppy, charp, 0);
4629 module_param(FLOPPY_IRQ, int, 0);
4630 module_param(FLOPPY_DMA, int, 0);
4631 MODULE_AUTHOR("Alain L. Knaff");
4632 MODULE_SUPPORTED_DEVICE("fd");
4633 MODULE_LICENSE("GPL");
4635 /* This doesn't actually get used other than for module information */
4636 static const struct pnp_device_id floppy_pnpids[] = {
4641 MODULE_DEVICE_TABLE(pnp, floppy_pnpids);
4645 __setup("floppy=", floppy_setup);
4646 module_init(floppy_init)
4649 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);