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
9 * 02.12.91 - Changed to static variables to indicate need for reset
10 * and recalibrate. This makes some things easier (output_byte reset
11 * checking etc), and means less interrupt jumping in case of errors,
12 * so the code is hopefully easier to understand.
16 * This file is certainly a mess. I've tried my best to get it working,
17 * but I don't like programming floppies, and I have only one anyway.
18 * Urgel. I should check for more errors, and do more graceful error
19 * recovery. Seems there are problems with several drives. I've tried to
20 * correct them. No promises.
24 * As with hd.c, all routines within this file can (and will) be called
25 * by interrupts, so extreme caution is needed. A hardware interrupt
26 * handler may not sleep, or a kernel panic will happen. Thus I cannot
27 * call "floppy-on" directly, but have to set a special timer interrupt
32 * 28.02.92 - made track-buffering routines, based on the routines written
33 * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus.
37 * Automatic floppy-detection and formatting written by Werner Almesberger
38 * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with
39 * the floppy-change signal detection.
43 * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed
44 * FDC data overrun bug, added some preliminary stuff for vertical
47 * 1992/9/17: Added DMA allocation & DMA functions. -- hhb.
49 * TODO: Errors are still not counted properly.
53 * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl)
54 * modeled after the freeware MS-DOS program fdformat/88 V1.8 by
55 * Christoph H. Hochst\"atter.
56 * I have fixed the shift values to the ones I always use. Maybe a new
57 * ioctl() should be created to be able to modify them.
58 * There is a bug in the driver that makes it impossible to format a
59 * floppy as the first thing after bootup.
63 * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and
64 * this helped the floppy driver as well. Much cleaner, and still seems to
68 /* 1994/6/24 --bbroad-- added the floppy table entries and made
69 * minor modifications to allow 2.88 floppies to be run.
72 /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more
77 * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger
78 * format bug fixes, but unfortunately some new bugs too...
81 /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write
82 * errors to allow safe writing by specialized programs.
85 /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks
86 * by defining bit 1 of the "stretch" parameter to mean put sectors on the
87 * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's
88 * drives are "upside-down").
92 * 1995/8/26 -- Andreas Busse -- added Mips support.
96 * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent
97 * features to asm/floppy.h.
101 * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
105 * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of
106 * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting &
107 * use of '0' for NULL.
111 * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation
116 * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives.
120 * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24
121 * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were
122 * being used to store jiffies, which are unsigned longs).
126 * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br>
127 * - get rid of check_region
132 * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no
133 * floppy controller (lingering task on list after module is gone... boom.)
137 * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range
138 * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix
139 * requires many non-obvious changes in arch dependent code.
142 /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>.
143 * Better audit of register_blkdev.
146 #define FLOPPY_SANITY_CHECK
147 #undef FLOPPY_SILENT_DCL_CLEAR
149 #define REALLY_SLOW_IO
152 #define DCL_DEBUG /* debug disk change line */
154 /* do print messages for unexpected interrupts */
155 static int print_unex = 1;
156 #include <linux/module.h>
157 #include <linux/sched.h>
158 #include <linux/fs.h>
159 #include <linux/kernel.h>
160 #include <linux/timer.h>
161 #include <linux/workqueue.h>
163 #include <linux/fdreg.h>
165 #include <linux/fd.h>
166 #include <linux/hdreg.h>
168 #include <linux/errno.h>
169 #include <linux/slab.h>
170 #include <linux/mm.h>
171 #include <linux/bio.h>
172 #include <linux/string.h>
173 #include <linux/jiffies.h>
174 #include <linux/fcntl.h>
175 #include <linux/delay.h>
176 #include <linux/mc146818rtc.h> /* CMOS defines */
177 #include <linux/ioport.h>
178 #include <linux/interrupt.h>
179 #include <linux/init.h>
180 #include <linux/platform_device.h>
181 #include <linux/buffer_head.h> /* for invalidate_buffers() */
182 #include <linux/mutex.h>
185 * PS/2 floppies have much slower step rates than regular floppies.
186 * It's been recommended that take about 1/4 of the default speed
187 * in some more extreme cases.
189 static int slow_floppy;
193 #include <asm/system.h>
195 #include <asm/uaccess.h>
197 static int FLOPPY_IRQ = 6;
198 static int FLOPPY_DMA = 2;
199 static int can_use_virtual_dma = 2;
201 * can use virtual DMA:
202 * 0 = use of virtual DMA disallowed by config
203 * 1 = use of virtual DMA prescribed by config
204 * 2 = no virtual DMA preference configured. By default try hard DMA,
205 * but fall back on virtual DMA when not enough memory available
208 static int use_virtual_dma;
212 * 1 using virtual DMA
213 * This variable is set to virtual when a DMA mem problem arises, and
214 * reset back in floppy_grab_irq_and_dma.
215 * It is not safe to reset it in other circumstances, because the floppy
216 * driver may have several buffers in use at once, and we do currently not
217 * record each buffers capabilities
220 static DEFINE_SPINLOCK(floppy_lock);
221 static struct completion device_release;
223 static unsigned short virtual_dma_port = 0x3f0;
224 irqreturn_t floppy_interrupt(int irq, void *dev_id);
225 static int set_dor(int fdc, char mask, char data);
227 #define K_64 0x10000 /* 64KB */
229 /* the following is the mask of allowed drives. By default units 2 and
230 * 3 of both floppy controllers are disabled, because switching on the
231 * motor of these drives causes system hangs on some PCI computers. drive
232 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
233 * a drive is allowed.
235 * NOTE: This must come before we include the arch floppy header because
236 * some ports reference this variable from there. -DaveM
239 static int allowed_drive_mask = 0x33;
241 #include <asm/floppy.h>
243 static int irqdma_allocated;
245 #define DEVICE_NAME "floppy"
247 #include <linux/blkdev.h>
248 #include <linux/blkpg.h>
249 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
250 #include <linux/completion.h>
252 static struct request *current_req;
253 static struct request_queue *floppy_queue;
254 static void do_fd_request(struct request_queue * q);
256 #ifndef fd_get_dma_residue
257 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
260 /* Dma Memory related stuff */
262 #ifndef fd_dma_mem_free
263 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
266 #ifndef fd_dma_mem_alloc
267 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL,get_order(size))
270 static inline void fallback_on_nodma_alloc(char **addr, size_t l)
272 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
274 return; /* we have the memory */
275 if (can_use_virtual_dma != 2)
276 return; /* no fallback allowed */
278 ("DMA memory shortage. Temporarily falling back on virtual DMA\n");
279 *addr = (char *)nodma_mem_alloc(l);
285 /* End dma memory related stuff */
287 static unsigned long fake_change;
288 static int initialising = 1;
290 #define ITYPE(x) (((x)>>2) & 0x1f)
291 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
292 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
293 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
294 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
295 /* reverse mapping from unit and fdc to drive */
296 #define DP (&drive_params[current_drive])
297 #define DRS (&drive_state[current_drive])
298 #define DRWE (&write_errors[current_drive])
299 #define FDCS (&fdc_state[fdc])
300 #define CLEARF(x) clear_bit(x##_BIT, &DRS->flags)
301 #define SETF(x) set_bit(x##_BIT, &DRS->flags)
302 #define TESTF(x) test_bit(x##_BIT, &DRS->flags)
304 #define UDP (&drive_params[drive])
305 #define UDRS (&drive_state[drive])
306 #define UDRWE (&write_errors[drive])
307 #define UFDCS (&fdc_state[FDC(drive)])
308 #define UCLEARF(x) clear_bit(x##_BIT, &UDRS->flags)
309 #define USETF(x) set_bit(x##_BIT, &UDRS->flags)
310 #define UTESTF(x) test_bit(x##_BIT, &UDRS->flags)
312 #define DPRINT(format, args...) printk(DEVICE_NAME "%d: " format, current_drive , ## args)
314 #define PH_HEAD(floppy,head) (((((floppy)->stretch & 2) >>1) ^ head) << 2)
315 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
317 #define CLEARSTRUCT(x) memset((x), 0, sizeof(*(x)))
320 #define COMMAND raw_cmd->cmd[0]
321 #define DR_SELECT raw_cmd->cmd[1]
322 #define TRACK raw_cmd->cmd[2]
323 #define HEAD raw_cmd->cmd[3]
324 #define SECTOR raw_cmd->cmd[4]
325 #define SIZECODE raw_cmd->cmd[5]
326 #define SECT_PER_TRACK raw_cmd->cmd[6]
327 #define GAP raw_cmd->cmd[7]
328 #define SIZECODE2 raw_cmd->cmd[8]
332 #define F_SIZECODE raw_cmd->cmd[2]
333 #define F_SECT_PER_TRACK raw_cmd->cmd[3]
334 #define F_GAP raw_cmd->cmd[4]
335 #define F_FILL raw_cmd->cmd[5]
339 * Maximum disk size (in kilobytes). This default is used whenever the
340 * current disk size is unknown.
341 * [Now it is rather a minimum]
343 #define MAX_DISK_SIZE 4 /* 3984 */
346 * globals used by 'result()'
348 #define MAX_REPLIES 16
349 static unsigned char reply_buffer[MAX_REPLIES];
350 static int inr; /* size of reply buffer, when called from interrupt */
351 #define ST0 (reply_buffer[0])
352 #define ST1 (reply_buffer[1])
353 #define ST2 (reply_buffer[2])
354 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */
355 #define R_TRACK (reply_buffer[3])
356 #define R_HEAD (reply_buffer[4])
357 #define R_SECTOR (reply_buffer[5])
358 #define R_SIZECODE (reply_buffer[6])
360 #define SEL_DLY (2*HZ/100)
363 * this struct defines the different floppy drive types.
366 struct floppy_drive_params params;
367 const char *name; /* name printed while booting */
368 } default_drive_params[] = {
369 /* NOTE: the time values in jiffies should be in msec!
371 | Maximum data rate supported by drive type
372 | | Head load time, msec
373 | | | Head unload time, msec (not used)
374 | | | | Step rate interval, usec
375 | | | | | Time needed for spinup time (jiffies)
376 | | | | | | Timeout for spinning down (jiffies)
377 | | | | | | | Spindown offset (where disk stops)
378 | | | | | | | | Select delay
379 | | | | | | | | | RPS
380 | | | | | | | | | | Max number of tracks
381 | | | | | | | | | | | Interrupt timeout
382 | | | | | | | | | | | | Max nonintlv. sectors
383 | | | | | | | | | | | | | -Max Errors- flags */
384 {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0,
385 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" },
387 {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0,
388 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
390 {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0,
391 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
393 {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
394 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/
396 {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
397 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/
399 {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
400 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
402 {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
403 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/
404 /* | --autodetected formats--- | | |
405 * read_track | | Name printed when booting
407 * Frequency of disk change checks */
410 static struct floppy_drive_params drive_params[N_DRIVE];
411 static struct floppy_drive_struct drive_state[N_DRIVE];
412 static struct floppy_write_errors write_errors[N_DRIVE];
413 static struct timer_list motor_off_timer[N_DRIVE];
414 static struct gendisk *disks[N_DRIVE];
415 static struct block_device *opened_bdev[N_DRIVE];
416 static DEFINE_MUTEX(open_lock);
417 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
420 * This struct defines the different floppy types.
422 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
423 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
424 * tells if the disk is in Commodore 1581 format, which means side 0 sectors
425 * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
426 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
427 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
428 * side 0 is on physical side 0 (but with the misnamed sector IDs).
429 * 'stretch' should probably be renamed to something more general, like
430 * 'options'. Other parameters should be self-explanatory (see also
440 | | | | | | Data rate, | 0x40 for perp
441 | | | | | | | Spec1 (stepping rate, head unload
442 | | | | | | | | /fmt gap (gap2) */
443 static struct floppy_struct floppy_type[32] = {
444 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */
445 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
446 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
447 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
448 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
449 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
450 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
451 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
452 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
453 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
455 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
456 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
457 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
458 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
459 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
460 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
461 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
462 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
463 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
464 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
466 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
467 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
468 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
469 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
470 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
471 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
472 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
473 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
474 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
476 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
477 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
478 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
481 #define SECTSIZE (_FD_SECTSIZE(*floppy))
483 /* Auto-detection: Disk type used until the next media change occurs. */
484 static struct floppy_struct *current_type[N_DRIVE];
487 * User-provided type information. current_type points to
488 * the respective entry of this array.
490 static struct floppy_struct user_params[N_DRIVE];
492 static sector_t floppy_sizes[256];
494 static char floppy_device_name[] = "floppy";
497 * The driver is trying to determine the correct media format
498 * while probing is set. rw_interrupt() clears it after a
503 /* Synchronization of FDC access. */
504 #define FD_COMMAND_NONE -1
505 #define FD_COMMAND_ERROR 2
506 #define FD_COMMAND_OKAY 3
508 static volatile int command_status = FD_COMMAND_NONE;
509 static unsigned long fdc_busy;
510 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
511 static DECLARE_WAIT_QUEUE_HEAD(command_done);
513 #define NO_SIGNAL (!interruptible || !signal_pending(current))
514 #define CALL(x) if ((x) == -EINTR) return -EINTR
515 #define ECALL(x) if ((ret = (x))) return ret;
516 #define _WAIT(x,i) CALL(ret=wait_til_done((x),i))
517 #define WAIT(x) _WAIT((x),interruptible)
518 #define IWAIT(x) _WAIT((x),1)
520 /* Errors during formatting are counted here. */
521 static int format_errors;
523 /* Format request descriptor. */
524 static struct format_descr format_req;
527 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
528 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
529 * H is head unload time (1=16ms, 2=32ms, etc)
534 * Because these are written to by the DMA controller, they must
535 * not contain a 64k byte boundary crossing, or data will be
538 static char *floppy_track_buffer;
539 static int max_buffer_sectors;
542 typedef void (*done_f) (int);
543 static struct cont_t {
544 void (*interrupt) (void); /* this is called after the interrupt of the
546 void (*redo) (void); /* this is called to retry the operation */
547 void (*error) (void); /* this is called to tally an error */
548 done_f done; /* this is called to say if the operation has
549 * succeeded/failed */
552 static void floppy_ready(void);
553 static void floppy_start(void);
554 static void process_fd_request(void);
555 static void recalibrate_floppy(void);
556 static void floppy_shutdown(unsigned long);
558 static int floppy_grab_irq_and_dma(void);
559 static void floppy_release_irq_and_dma(void);
562 * The "reset" variable should be tested whenever an interrupt is scheduled,
563 * after the commands have been sent. This is to ensure that the driver doesn't
564 * get wedged when the interrupt doesn't come because of a failed command.
565 * reset doesn't need to be tested before sending commands, because
566 * output_byte is automatically disabled when reset is set.
568 #define CHECK_RESET { if (FDCS->reset){ reset_fdc(); return; } }
569 static void reset_fdc(void);
572 * These are global variables, as that's the easiest way to give
573 * information to interrupts. They are the data used for the current
577 #define NEED_1_RECAL -2
578 #define NEED_2_RECAL -3
580 static int usage_count;
582 /* buffer related variables */
583 static int buffer_track = -1;
584 static int buffer_drive = -1;
585 static int buffer_min = -1;
586 static int buffer_max = -1;
588 /* fdc related variables, should end up in a struct */
589 static struct floppy_fdc_state fdc_state[N_FDC];
590 static int fdc; /* current fdc */
592 static struct floppy_struct *_floppy = floppy_type;
593 static unsigned char current_drive;
594 static long current_count_sectors;
595 static unsigned char fsector_t; /* sector in track */
596 static unsigned char in_sector_offset; /* offset within physical sector,
597 * expressed in units of 512 bytes */
600 static inline int fd_eject(int drive)
611 static long unsigned debugtimer;
613 static inline void set_debugt(void)
615 debugtimer = jiffies;
618 static inline void debugt(const char *message)
620 if (DP->flags & DEBUGT)
621 printk("%s dtime=%lu\n", message, jiffies - debugtimer);
624 static inline void set_debugt(void) { }
625 static inline void debugt(const char *message) { }
628 typedef void (*timeout_fn) (unsigned long);
629 static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0);
631 static const char *timeout_message;
633 #ifdef FLOPPY_SANITY_CHECK
634 static void is_alive(const char *message)
636 /* this routine checks whether the floppy driver is "alive" */
637 if (test_bit(0, &fdc_busy) && command_status < 2
638 && !timer_pending(&fd_timeout)) {
639 DPRINT("timeout handler died: %s\n", message);
644 static void (*do_floppy) (void) = NULL;
646 #ifdef FLOPPY_SANITY_CHECK
650 static void (*lasthandler) (void);
651 static unsigned long interruptjiffies;
652 static unsigned long resultjiffies;
653 static int resultsize;
654 static unsigned long lastredo;
656 static struct output_log {
658 unsigned char status;
659 unsigned long jiffies;
660 } output_log[OLOGSIZE];
662 static int output_log_pos;
665 #define current_reqD -1
666 #define MAXTIMEOUT -2
668 static void __reschedule_timeout(int drive, const char *message, int marg)
670 if (drive == current_reqD)
671 drive = current_drive;
672 del_timer(&fd_timeout);
673 if (drive < 0 || drive >= N_DRIVE) {
674 fd_timeout.expires = jiffies + 20UL * HZ;
677 fd_timeout.expires = jiffies + UDP->timeout;
678 add_timer(&fd_timeout);
679 if (UDP->flags & FD_DEBUG) {
680 DPRINT("reschedule timeout ");
681 printk(message, marg);
684 timeout_message = message;
687 static void reschedule_timeout(int drive, const char *message, int marg)
691 spin_lock_irqsave(&floppy_lock, flags);
692 __reschedule_timeout(drive, message, marg);
693 spin_unlock_irqrestore(&floppy_lock, flags);
696 #define INFBOUND(a,b) (a)=max_t(int, a, b)
698 #define SUPBOUND(a,b) (a)=min_t(int, a, b)
701 * Bottom half floppy driver.
702 * ==========================
704 * This part of the file contains the code talking directly to the hardware,
705 * and also the main service loop (seek-configure-spinup-command)
710 * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
711 * and the last_checked date.
713 * last_checked is the date of the last check which showed 'no disk change'
714 * FD_DISK_CHANGE is set under two conditions:
715 * 1. The floppy has been changed after some i/o to that floppy already
717 * 2. No floppy disk is in the drive. This is done in order to ensure that
718 * requests are quickly flushed in case there is no disk in the drive. It
719 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
722 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
723 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
724 * each seek. If a disk is present, the disk change line should also be
725 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
726 * change line is set, this means either that no disk is in the drive, or
727 * that it has been removed since the last seek.
729 * This means that we really have a third possibility too:
730 * The floppy has been changed after the last seek.
733 static int disk_change(int drive)
735 int fdc = FDC(drive);
736 #ifdef FLOPPY_SANITY_CHECK
737 if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
738 DPRINT("WARNING disk change called early\n");
739 if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
740 (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
741 DPRINT("probing disk change on unselected drive\n");
742 DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive),
743 (unsigned int)FDCS->dor);
748 if (UDP->flags & FD_DEBUG) {
749 DPRINT("checking disk change line for drive %d\n", drive);
750 DPRINT("jiffies=%lu\n", jiffies);
751 DPRINT("disk change line=%x\n", fd_inb(FD_DIR) & 0x80);
752 DPRINT("flags=%lx\n", UDRS->flags);
755 if (UDP->flags & FD_BROKEN_DCL)
756 return UTESTF(FD_DISK_CHANGED);
757 if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) {
758 USETF(FD_VERIFY); /* verify write protection */
759 if (UDRS->maxblock) {
760 /* mark it changed */
761 USETF(FD_DISK_CHANGED);
764 /* invalidate its geometry */
765 if (UDRS->keep_data >= 0) {
766 if ((UDP->flags & FTD_MSG) &&
767 current_type[drive] != NULL)
768 DPRINT("Disk type is undefined after "
770 current_type[drive] = NULL;
771 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1;
774 /*USETF(FD_DISK_NEWCHANGE); */
777 UDRS->last_checked = jiffies;
778 UCLEARF(FD_DISK_NEWCHANGE);
783 static inline int is_selected(int dor, int unit)
785 return ((dor & (0x10 << unit)) && (dor & 3) == unit);
788 static int set_dor(int fdc, char mask, char data)
790 register unsigned char drive, unit, newdor, olddor;
792 if (FDCS->address == -1)
796 newdor = (olddor & mask) | data;
797 if (newdor != olddor) {
799 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) {
800 drive = REVDRIVE(fdc, unit);
802 if (UDP->flags & FD_DEBUG) {
803 DPRINT("calling disk change from set_dor\n");
809 fd_outb(newdor, FD_DOR);
812 if (!is_selected(olddor, unit) && is_selected(newdor, unit)) {
813 drive = REVDRIVE(fdc, unit);
814 UDRS->select_date = jiffies;
820 static void twaddle(void)
822 if (DP->select_delay)
824 fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR);
825 fd_outb(FDCS->dor, FD_DOR);
826 DRS->select_date = jiffies;
829 /* reset all driver information about the current fdc. This is needed after
830 * a reset, and after a raw command. */
831 static void reset_fdc_info(int mode)
835 FDCS->spec1 = FDCS->spec2 = -1;
836 FDCS->need_configure = 1;
839 for (drive = 0; drive < N_DRIVE; drive++)
840 if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL))
841 UDRS->track = NEED_2_RECAL;
844 /* selects the fdc and drive, and enables the fdc's input/dma. */
845 static void set_fdc(int drive)
847 if (drive >= 0 && drive < N_DRIVE) {
849 current_drive = drive;
851 if (fdc != 1 && fdc != 0) {
852 printk("bad fdc value\n");
857 set_dor(1 - fdc, ~8, 0);
859 if (FDCS->rawcmd == 2)
861 if (fd_inb(FD_STATUS) != STATUS_READY)
865 /* locks the driver */
866 static int _lock_fdc(int drive, int interruptible, int line)
870 "Trying to lock fdc while usage count=0 at line %d\n",
875 if (test_and_set_bit(0, &fdc_busy)) {
876 DECLARE_WAITQUEUE(wait, current);
877 add_wait_queue(&fdc_wait, &wait);
880 set_current_state(TASK_INTERRUPTIBLE);
882 if (!test_and_set_bit(0, &fdc_busy))
888 remove_wait_queue(&fdc_wait, &wait);
893 set_current_state(TASK_RUNNING);
894 remove_wait_queue(&fdc_wait, &wait);
896 flush_scheduled_work();
898 command_status = FD_COMMAND_NONE;
900 __reschedule_timeout(drive, "lock fdc", 0);
905 #define lock_fdc(drive,interruptible) _lock_fdc(drive,interruptible, __LINE__)
907 #define LOCK_FDC(drive,interruptible) \
908 if (lock_fdc(drive,interruptible)) return -EINTR;
910 /* unlocks the driver */
911 static inline void unlock_fdc(void)
916 if (!test_bit(0, &fdc_busy))
917 DPRINT("FDC access conflict!\n");
920 DPRINT("device interrupt still active at FDC release: %p!\n",
922 command_status = FD_COMMAND_NONE;
923 spin_lock_irqsave(&floppy_lock, flags);
924 del_timer(&fd_timeout);
926 clear_bit(0, &fdc_busy);
927 if (elv_next_request(floppy_queue))
928 do_fd_request(floppy_queue);
929 spin_unlock_irqrestore(&floppy_lock, flags);
933 /* switches the motor off after a given timeout */
934 static void motor_off_callback(unsigned long nr)
936 unsigned char mask = ~(0x10 << UNIT(nr));
938 set_dor(FDC(nr), mask, 0);
941 /* schedules motor off */
942 static void floppy_off(unsigned int drive)
944 unsigned long volatile delta;
945 register int fdc = FDC(drive);
947 if (!(FDCS->dor & (0x10 << UNIT(drive))))
950 del_timer(motor_off_timer + drive);
952 /* make spindle stop in a position which minimizes spinup time
955 delta = jiffies - UDRS->first_read_date + HZ -
956 UDP->spindown_offset;
957 delta = ((delta * UDP->rps) % HZ) / UDP->rps;
958 motor_off_timer[drive].expires =
959 jiffies + UDP->spindown - delta;
961 add_timer(motor_off_timer + drive);
965 * cycle through all N_DRIVE floppy drives, for disk change testing.
966 * stopping at current drive. This is done before any long operation, to
967 * be sure to have up to date disk change information.
969 static void scandrives(void)
971 int i, drive, saved_drive;
973 if (DP->select_delay)
976 saved_drive = current_drive;
977 for (i = 0; i < N_DRIVE; i++) {
978 drive = (saved_drive + i + 1) % N_DRIVE;
979 if (UDRS->fd_ref == 0 || UDP->select_delay != 0)
980 continue; /* skip closed drives */
982 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &
983 (0x10 << UNIT(drive))))
984 /* switch the motor off again, if it was off to
986 set_dor(fdc, ~(0x10 << UNIT(drive)), 0);
988 set_fdc(saved_drive);
991 static void empty(void)
995 static DECLARE_WORK(floppy_work, NULL);
997 static void schedule_bh(void (*handler) (void))
999 PREPARE_WORK(&floppy_work, (work_func_t)handler);
1000 schedule_work(&floppy_work);
1003 static DEFINE_TIMER(fd_timer, NULL, 0, 0);
1005 static void cancel_activity(void)
1007 unsigned long flags;
1009 spin_lock_irqsave(&floppy_lock, flags);
1011 PREPARE_WORK(&floppy_work, (work_func_t)empty);
1012 del_timer(&fd_timer);
1013 spin_unlock_irqrestore(&floppy_lock, flags);
1016 /* this function makes sure that the disk stays in the drive during the
1018 static void fd_watchdog(void)
1021 if (DP->flags & FD_DEBUG) {
1022 DPRINT("calling disk change from watchdog\n");
1026 if (disk_change(current_drive)) {
1027 DPRINT("disk removed during i/o\n");
1032 del_timer(&fd_timer);
1033 fd_timer.function = (timeout_fn) fd_watchdog;
1034 fd_timer.expires = jiffies + HZ / 10;
1035 add_timer(&fd_timer);
1039 static void main_command_interrupt(void)
1041 del_timer(&fd_timer);
1045 /* waits for a delay (spinup or select) to pass */
1046 static int fd_wait_for_completion(unsigned long delay, timeout_fn function)
1049 reset_fdc(); /* do the reset during sleep to win time
1050 * if we don't need to sleep, it's a good
1051 * occasion anyways */
1055 if (time_before(jiffies, delay)) {
1056 del_timer(&fd_timer);
1057 fd_timer.function = function;
1058 fd_timer.expires = delay;
1059 add_timer(&fd_timer);
1065 static DEFINE_SPINLOCK(floppy_hlt_lock);
1066 static int hlt_disabled;
1067 static void floppy_disable_hlt(void)
1069 unsigned long flags;
1071 spin_lock_irqsave(&floppy_hlt_lock, flags);
1072 if (!hlt_disabled) {
1074 #ifdef HAVE_DISABLE_HLT
1078 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1081 static void floppy_enable_hlt(void)
1083 unsigned long flags;
1085 spin_lock_irqsave(&floppy_hlt_lock, flags);
1088 #ifdef HAVE_DISABLE_HLT
1092 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1095 static void setup_DMA(void)
1099 #ifdef FLOPPY_SANITY_CHECK
1100 if (raw_cmd->length == 0) {
1103 printk("zero dma transfer size:");
1104 for (i = 0; i < raw_cmd->cmd_count; i++)
1105 printk("%x,", raw_cmd->cmd[i]);
1111 if (((unsigned long)raw_cmd->kernel_data) % 512) {
1112 printk("non aligned address: %p\n", raw_cmd->kernel_data);
1118 f = claim_dma_lock();
1121 if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length,
1122 (raw_cmd->flags & FD_RAW_READ) ?
1123 DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) {
1124 release_dma_lock(f);
1129 release_dma_lock(f);
1132 fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length);
1133 fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ?
1134 DMA_MODE_READ : DMA_MODE_WRITE);
1135 fd_set_dma_addr(raw_cmd->kernel_data);
1136 fd_set_dma_count(raw_cmd->length);
1137 virtual_dma_port = FDCS->address;
1139 release_dma_lock(f);
1141 floppy_disable_hlt();
1144 static void show_floppy(void);
1146 /* waits until the fdc becomes ready */
1147 static int wait_til_ready(void)
1149 int counter, status;
1152 for (counter = 0; counter < 10000; counter++) {
1153 status = fd_inb(FD_STATUS);
1154 if (status & STATUS_READY)
1157 if (!initialising) {
1158 DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc);
1165 /* sends a command byte to the fdc */
1166 static int output_byte(char byte)
1170 if ((status = wait_til_ready()) < 0)
1172 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY) {
1173 fd_outb(byte, FD_DATA);
1174 #ifdef FLOPPY_SANITY_CHECK
1175 output_log[output_log_pos].data = byte;
1176 output_log[output_log_pos].status = status;
1177 output_log[output_log_pos].jiffies = jiffies;
1178 output_log_pos = (output_log_pos + 1) % OLOGSIZE;
1183 if (!initialising) {
1184 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
1191 #define LAST_OUT(x) if (output_byte(x)<0){ reset_fdc();return;}
1193 /* gets the response from the fdc */
1194 static int result(void)
1198 for (i = 0; i < MAX_REPLIES; i++) {
1199 if ((status = wait_til_ready()) < 0)
1201 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA;
1202 if ((status & ~STATUS_BUSY) == STATUS_READY) {
1203 #ifdef FLOPPY_SANITY_CHECK
1204 resultjiffies = jiffies;
1209 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY))
1210 reply_buffer[i] = fd_inb(FD_DATA);
1214 if (!initialising) {
1216 ("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
1224 #define MORE_OUTPUT -2
1225 /* does the fdc need more output? */
1226 static int need_more_output(void)
1229 if ((status = wait_til_ready()) < 0)
1231 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY)
1236 /* Set perpendicular mode as required, based on data rate, if supported.
1237 * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1239 static inline void perpendicular_mode(void)
1241 unsigned char perp_mode;
1243 if (raw_cmd->rate & 0x40) {
1244 switch (raw_cmd->rate & 3) {
1252 DPRINT("Invalid data rate for perpendicular mode!\n");
1254 FDCS->reset = 1; /* convenient way to return to
1255 * redo without to much hassle (deep
1262 if (FDCS->perp_mode == perp_mode)
1264 if (FDCS->version >= FDC_82077_ORIG) {
1265 output_byte(FD_PERPENDICULAR);
1266 output_byte(perp_mode);
1267 FDCS->perp_mode = perp_mode;
1268 } else if (perp_mode) {
1269 DPRINT("perpendicular mode not supported by this FDC.\n");
1271 } /* perpendicular_mode */
1273 static int fifo_depth = 0xa;
1276 static int fdc_configure(void)
1279 output_byte(FD_CONFIGURE);
1280 if (need_more_output() != MORE_OUTPUT)
1283 output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf));
1284 output_byte(0); /* pre-compensation from track
1289 #define NOMINAL_DTR 500
1291 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1292 * head load time, and DMA disable flag to values needed by floppy.
1294 * The value "dtr" is the data transfer rate in Kbps. It is needed
1295 * to account for the data rate-based scaling done by the 82072 and 82077
1296 * FDC types. This parameter is ignored for other types of FDCs (i.e.
1299 * Note that changing the data transfer rate has a (probably deleterious)
1300 * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1301 * fdc_specify is called again after each data transfer rate
1304 * srt: 1000 to 16000 in microseconds
1305 * hut: 16 to 240 milliseconds
1306 * hlt: 2 to 254 milliseconds
1308 * These values are rounded up to the next highest available delay time.
1310 static void fdc_specify(void)
1312 unsigned char spec1, spec2;
1313 unsigned long srt, hlt, hut;
1314 unsigned long dtr = NOMINAL_DTR;
1315 unsigned long scale_dtr = NOMINAL_DTR;
1316 int hlt_max_code = 0x7f;
1317 int hut_max_code = 0xf;
1319 if (FDCS->need_configure && FDCS->version >= FDC_82072A) {
1321 FDCS->need_configure = 0;
1322 /*DPRINT("FIFO enabled\n"); */
1325 switch (raw_cmd->rate & 0x03) {
1331 if (FDCS->version >= FDC_82078) {
1332 /* chose the default rate table, not the one
1333 * where 1 = 2 Mbps */
1334 output_byte(FD_DRIVESPEC);
1335 if (need_more_output() == MORE_OUTPUT) {
1336 output_byte(UNIT(current_drive));
1346 if (FDCS->version >= FDC_82072) {
1348 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1349 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1352 /* Convert step rate from microseconds to milliseconds and 4 bits */
1353 srt = 16 - (DP->srt * scale_dtr / 1000 + NOMINAL_DTR - 1) / NOMINAL_DTR;
1360 hlt = (DP->hlt * scale_dtr / 2 + NOMINAL_DTR - 1) / NOMINAL_DTR;
1363 else if (hlt > 0x7f)
1366 hut = (DP->hut * scale_dtr / 16 + NOMINAL_DTR - 1) / NOMINAL_DTR;
1372 spec1 = (srt << 4) | hut;
1373 spec2 = (hlt << 1) | (use_virtual_dma & 1);
1375 /* If these parameters did not change, just return with success */
1376 if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) {
1377 /* Go ahead and set spec1 and spec2 */
1378 output_byte(FD_SPECIFY);
1379 output_byte(FDCS->spec1 = spec1);
1380 output_byte(FDCS->spec2 = spec2);
1384 /* Set the FDC's data transfer rate on behalf of the specified drive.
1385 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1386 * of the specify command (i.e. using the fdc_specify function).
1388 static int fdc_dtr(void)
1390 /* If data rate not already set to desired value, set it. */
1391 if ((raw_cmd->rate & 3) == FDCS->dtr)
1395 fd_outb(raw_cmd->rate & 3, FD_DCR);
1397 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1398 * need a stabilization period of several milliseconds to be
1399 * enforced after data rate changes before R/W operations.
1400 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1402 FDCS->dtr = raw_cmd->rate & 3;
1403 return (fd_wait_for_completion(jiffies + 2UL * HZ / 100,
1404 (timeout_fn) floppy_ready));
1407 static void tell_sector(void)
1409 printk(": track %d, head %d, sector %d, size %d",
1410 R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE);
1414 * OK, this error interpreting routine is called after a
1415 * DMA read/write has succeeded
1416 * or failed, so we check the results, and copy any buffers.
1417 * hhb: Added better error reporting.
1418 * ak: Made this into a separate routine.
1420 static int interpret_errors(void)
1425 DPRINT("-- FDC reply error");
1430 /* check IC to find cause of interrupt */
1431 switch (ST0 & ST0_INTR) {
1432 case 0x40: /* error occurred during command execution */
1434 return 0; /* occurs with pseudo-DMA */
1437 DPRINT("Drive is write protected\n");
1438 CLEARF(FD_DISK_WRITABLE);
1441 } else if (ST1 & ST1_ND) {
1442 SETF(FD_NEED_TWADDLE);
1443 } else if (ST1 & ST1_OR) {
1444 if (DP->flags & FTD_MSG)
1445 DPRINT("Over/Underrun - retrying\n");
1447 } else if (*errors >= DP->max_errors.reporting) {
1449 if (ST0 & ST0_ECE) {
1450 printk("Recalibrate failed!");
1451 } else if (ST2 & ST2_CRC) {
1452 printk("data CRC error");
1454 } else if (ST1 & ST1_CRC) {
1455 printk("CRC error");
1457 } else if ((ST1 & (ST1_MAM | ST1_ND))
1458 || (ST2 & ST2_MAM)) {
1460 printk("sector not found");
1463 printk("probe failed...");
1464 } else if (ST2 & ST2_WC) { /* seek error */
1465 printk("wrong cylinder");
1466 } else if (ST2 & ST2_BC) { /* cylinder marked as bad */
1467 printk("bad cylinder");
1470 ("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
1477 if (ST2 & ST2_WC || ST2 & ST2_BC)
1478 /* wrong cylinder => recal */
1479 DRS->track = NEED_2_RECAL;
1481 case 0x80: /* invalid command given */
1482 DPRINT("Invalid FDC command given!\n");
1486 DPRINT("Abnormal termination caused by polling\n");
1489 default: /* (0) Normal command termination */
1495 * This routine is called when everything should be correctly set up
1496 * for the transfer (i.e. floppy motor is on, the correct floppy is
1497 * selected, and the head is sitting on the right track).
1499 static void setup_rw_floppy(void)
1501 int i, r, flags, dflags;
1502 unsigned long ready_date;
1503 timeout_fn function;
1505 flags = raw_cmd->flags;
1506 if (flags & (FD_RAW_READ | FD_RAW_WRITE))
1507 flags |= FD_RAW_INTR;
1509 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) {
1510 ready_date = DRS->spinup_date + DP->spinup;
1511 /* If spinup will take a long time, rerun scandrives
1512 * again just before spinup completion. Beware that
1513 * after scandrives, we must again wait for selection.
1515 if (time_after(ready_date, jiffies + DP->select_delay)) {
1516 ready_date -= DP->select_delay;
1517 function = (timeout_fn) floppy_start;
1519 function = (timeout_fn) setup_rw_floppy;
1521 /* wait until the floppy is spinning fast enough */
1522 if (fd_wait_for_completion(ready_date, function))
1525 dflags = DRS->flags;
1527 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE))
1530 if (flags & FD_RAW_INTR)
1531 do_floppy = main_command_interrupt;
1534 for (i = 0; i < raw_cmd->cmd_count; i++)
1535 r |= output_byte(raw_cmd->cmd[i]);
1537 debugt("rw_command: ");
1545 if (!(flags & FD_RAW_INTR)) {
1548 } else if (flags & FD_RAW_NEED_DISK)
1552 static int blind_seek;
1555 * This is the routine called after every seek (or recalibrate) interrupt
1556 * from the floppy controller.
1558 static void seek_interrupt(void)
1560 debugt("seek interrupt:");
1561 if (inr != 2 || (ST0 & 0xF8) != 0x20) {
1562 DPRINT("seek failed\n");
1563 DRS->track = NEED_2_RECAL;
1568 if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) {
1570 if (DP->flags & FD_DEBUG) {
1572 ("clearing NEWCHANGE flag because of effective seek\n");
1573 DPRINT("jiffies=%lu\n", jiffies);
1576 CLEARF(FD_DISK_NEWCHANGE); /* effective seek */
1577 DRS->select_date = jiffies;
1583 static void check_wp(void)
1585 if (TESTF(FD_VERIFY)) {
1586 /* check write protection */
1587 output_byte(FD_GETSTATUS);
1588 output_byte(UNIT(current_drive));
1589 if (result() != 1) {
1594 CLEARF(FD_NEED_TWADDLE);
1596 if (DP->flags & FD_DEBUG) {
1597 DPRINT("checking whether disk is write protected\n");
1598 DPRINT("wp=%x\n", ST3 & 0x40);
1602 SETF(FD_DISK_WRITABLE);
1604 CLEARF(FD_DISK_WRITABLE);
1608 static void seek_floppy(void)
1615 if (DP->flags & FD_DEBUG) {
1616 DPRINT("calling disk change from seek\n");
1620 if (!TESTF(FD_DISK_NEWCHANGE) &&
1621 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) {
1622 /* the media changed flag should be cleared after the seek.
1623 * If it isn't, this means that there is really no disk in
1626 SETF(FD_DISK_CHANGED);
1631 if (DRS->track <= NEED_1_RECAL) {
1632 recalibrate_floppy();
1634 } else if (TESTF(FD_DISK_NEWCHANGE) &&
1635 (raw_cmd->flags & FD_RAW_NEED_DISK) &&
1636 (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) {
1637 /* we seek to clear the media-changed condition. Does anybody
1638 * know a more elegant way, which works on all drives? */
1640 track = raw_cmd->track - 1;
1642 if (DP->flags & FD_SILENT_DCL_CLEAR) {
1643 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0);
1645 raw_cmd->flags |= FD_RAW_NEED_SEEK;
1651 if (raw_cmd->track != DRS->track &&
1652 (raw_cmd->flags & FD_RAW_NEED_SEEK))
1653 track = raw_cmd->track;
1660 do_floppy = seek_interrupt;
1661 output_byte(FD_SEEK);
1662 output_byte(UNIT(current_drive));
1664 debugt("seek command:");
1667 static void recal_interrupt(void)
1669 debugt("recal interrupt:");
1672 else if (ST0 & ST0_ECE) {
1673 switch (DRS->track) {
1675 debugt("recal interrupt need 1 recal:");
1676 /* after a second recalibrate, we still haven't
1677 * reached track 0. Probably no drive. Raise an
1678 * error, as failing immediately might upset
1679 * computers possessed by the Devil :-) */
1684 debugt("recal interrupt need 2 recal:");
1685 /* If we already did a recalibrate,
1686 * and we are not at track 0, this
1687 * means we have moved. (The only way
1688 * not to move at recalibration is to
1689 * be already at track 0.) Clear the
1690 * new change flag */
1692 if (DP->flags & FD_DEBUG) {
1694 ("clearing NEWCHANGE flag because of second recalibrate\n");
1698 CLEARF(FD_DISK_NEWCHANGE);
1699 DRS->select_date = jiffies;
1702 debugt("recal interrupt default:");
1703 /* Recalibrate moves the head by at
1704 * most 80 steps. If after one
1705 * recalibrate we don't have reached
1706 * track 0, this might mean that we
1707 * started beyond track 80. Try
1709 DRS->track = NEED_1_RECAL;
1717 static void print_result(char *message, int inr)
1721 DPRINT("%s ", message);
1723 for (i = 0; i < inr; i++)
1724 printk("repl[%d]=%x ", i, reply_buffer[i]);
1728 /* interrupt handler. Note that this can be called externally on the Sparc */
1729 irqreturn_t floppy_interrupt(int irq, void *dev_id)
1731 void (*handler) (void) = do_floppy;
1735 lasthandler = handler;
1736 interruptjiffies = jiffies;
1738 f = claim_dma_lock();
1740 release_dma_lock(f);
1742 floppy_enable_hlt();
1744 if (fdc >= N_FDC || FDCS->address == -1) {
1745 /* we don't even know which FDC is the culprit */
1746 printk("DOR0=%x\n", fdc_state[0].dor);
1747 printk("floppy interrupt on bizarre fdc %d\n", fdc);
1748 printk("handler=%p\n", handler);
1749 is_alive("bizarre fdc");
1754 /* We have to clear the reset flag here, because apparently on boxes
1755 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
1756 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
1757 * emission of the SENSEI's.
1758 * It is OK to emit floppy commands because we are in an interrupt
1759 * handler here, and thus we have to fear no interference of other
1763 do_print = !handler && print_unex && !initialising;
1767 print_result("unexpected interrupt", inr);
1771 output_byte(FD_SENSEI);
1774 print_result("sensei", inr);
1776 } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2
1783 schedule_bh(handler);
1784 is_alive("normal interrupt end");
1786 /* FIXME! Was it really for us? */
1790 static void recalibrate_floppy(void)
1792 debugt("recalibrate floppy:");
1793 do_floppy = recal_interrupt;
1794 output_byte(FD_RECALIBRATE);
1795 LAST_OUT(UNIT(current_drive));
1799 * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1801 static void reset_interrupt(void)
1803 debugt("reset interrupt:");
1804 result(); /* get the status ready for set_fdc */
1806 printk("reset set in interrupt, calling %p\n", cont->error);
1807 cont->error(); /* a reset just after a reset. BAD! */
1813 * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1814 * or by setting the self clearing bit 7 of STATUS (newer FDCs)
1816 static void reset_fdc(void)
1818 unsigned long flags;
1820 do_floppy = reset_interrupt;
1824 /* Pseudo-DMA may intercept 'reset finished' interrupt. */
1825 /* Irrelevant for systems with true DMA (i386). */
1827 flags = claim_dma_lock();
1829 release_dma_lock(flags);
1831 if (FDCS->version >= FDC_82072A)
1832 fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS);
1834 fd_outb(FDCS->dor & ~0x04, FD_DOR);
1835 udelay(FD_RESET_DELAY);
1836 fd_outb(FDCS->dor, FD_DOR);
1840 static void show_floppy(void)
1845 printk("floppy driver state\n");
1846 printk("-------------------\n");
1847 printk("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n",
1848 jiffies, interruptjiffies, jiffies - interruptjiffies,
1851 #ifdef FLOPPY_SANITY_CHECK
1852 printk("timeout_message=%s\n", timeout_message);
1853 printk("last output bytes:\n");
1854 for (i = 0; i < OLOGSIZE; i++)
1855 printk("%2x %2x %lu\n",
1856 output_log[(i + output_log_pos) % OLOGSIZE].data,
1857 output_log[(i + output_log_pos) % OLOGSIZE].status,
1858 output_log[(i + output_log_pos) % OLOGSIZE].jiffies);
1859 printk("last result at %lu\n", resultjiffies);
1860 printk("last redo_fd_request at %lu\n", lastredo);
1861 for (i = 0; i < resultsize; i++) {
1862 printk("%2x ", reply_buffer[i]);
1867 printk("status=%x\n", fd_inb(FD_STATUS));
1868 printk("fdc_busy=%lu\n", fdc_busy);
1870 printk("do_floppy=%p\n", do_floppy);
1871 if (work_pending(&floppy_work))
1872 printk("floppy_work.func=%p\n", floppy_work.func);
1873 if (timer_pending(&fd_timer))
1874 printk("fd_timer.function=%p\n", fd_timer.function);
1875 if (timer_pending(&fd_timeout)) {
1876 printk("timer_function=%p\n", fd_timeout.function);
1877 printk("expires=%lu\n", fd_timeout.expires - jiffies);
1878 printk("now=%lu\n", jiffies);
1880 printk("cont=%p\n", cont);
1881 printk("current_req=%p\n", current_req);
1882 printk("command_status=%d\n", command_status);
1886 static void floppy_shutdown(unsigned long data)
1888 unsigned long flags;
1894 floppy_enable_hlt();
1896 flags = claim_dma_lock();
1898 release_dma_lock(flags);
1900 /* avoid dma going to a random drive after shutdown */
1903 DPRINT("floppy timeout called\n");
1907 cont->redo(); /* this will recall reset when needed */
1909 printk("no cont in shutdown!\n");
1910 process_fd_request();
1912 is_alive("floppy shutdown");
1915 /*typedef void (*timeout_fn)(unsigned long);*/
1917 /* start motor, check media-changed condition and write protection */
1918 static int start_motor(void (*function) (void))
1923 data = UNIT(current_drive);
1924 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) {
1925 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) {
1927 /* no read since this drive is running */
1928 DRS->first_read_date = 0;
1929 /* note motor start time if motor is not yet running */
1930 DRS->spinup_date = jiffies;
1931 data |= (0x10 << UNIT(current_drive));
1933 } else if (FDCS->dor & (0x10 << UNIT(current_drive)))
1934 mask &= ~(0x10 << UNIT(current_drive));
1936 /* starts motor and selects floppy */
1937 del_timer(motor_off_timer + current_drive);
1938 set_dor(fdc, mask, data);
1940 /* wait_for_completion also schedules reset if needed. */
1941 return (fd_wait_for_completion(DRS->select_date + DP->select_delay,
1942 (timeout_fn) function));
1945 static void floppy_ready(void)
1948 if (start_motor(floppy_ready))
1954 if (DP->flags & FD_DEBUG) {
1955 DPRINT("calling disk change from floppy_ready\n");
1958 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
1959 disk_change(current_drive) && !DP->select_delay)
1960 twaddle(); /* this clears the dcl on certain drive/controller
1963 #ifdef fd_chose_dma_mode
1964 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) {
1965 unsigned long flags = claim_dma_lock();
1966 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length);
1967 release_dma_lock(flags);
1971 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) {
1972 perpendicular_mode();
1973 fdc_specify(); /* must be done here because of hut, hlt ... */
1976 if ((raw_cmd->flags & FD_RAW_READ) ||
1977 (raw_cmd->flags & FD_RAW_WRITE))
1983 static void floppy_start(void)
1985 reschedule_timeout(current_reqD, "floppy start", 0);
1989 if (DP->flags & FD_DEBUG) {
1990 DPRINT("setting NEWCHANGE in floppy_start\n");
1993 SETF(FD_DISK_NEWCHANGE);
1998 * ========================================================================
1999 * here ends the bottom half. Exported routines are:
2000 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
2001 * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
2002 * Initialization also uses output_byte, result, set_dor, floppy_interrupt
2004 * ========================================================================
2007 * General purpose continuations.
2008 * ==============================
2011 static void do_wakeup(void)
2013 reschedule_timeout(MAXTIMEOUT, "do wakeup", 0);
2015 command_status += 2;
2016 wake_up(&command_done);
2019 static struct cont_t wakeup_cont = {
2023 .done = (done_f) empty
2026 static struct cont_t intr_cont = {
2028 .redo = process_fd_request,
2030 .done = (done_f) empty
2033 static int wait_til_done(void (*handler) (void), int interruptible)
2037 schedule_bh(handler);
2039 if (command_status < 2 && NO_SIGNAL) {
2040 DECLARE_WAITQUEUE(wait, current);
2042 add_wait_queue(&command_done, &wait);
2044 set_current_state(interruptible ?
2045 TASK_INTERRUPTIBLE :
2046 TASK_UNINTERRUPTIBLE);
2048 if (command_status >= 2 || !NO_SIGNAL)
2051 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);
2145 _floppy = floppy_type + type;
2147 _floppy = current_type[drive];
2151 * formatting support.
2152 * ===================
2154 static void format_interrupt(void)
2156 switch (interpret_errors()) {
2167 #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2)
2168 #define FM_MODE(x,y) ((y) & ~(((x)->rate & 0x80) >>1))
2169 #define CT(x) ((x) | 0xc0)
2170 static void setup_format_params(int track)
2173 unsigned char track, head, sect, size;
2174 } *here = (struct fparm *)floppy_track_buffer;
2176 int count, head_shift, track_shift;
2178 raw_cmd = &default_raw_cmd;
2179 raw_cmd->track = track;
2181 raw_cmd->flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
2182 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK;
2183 raw_cmd->rate = _floppy->rate & 0x43;
2184 raw_cmd->cmd_count = NR_F;
2185 COMMAND = FM_MODE(_floppy, FD_FORMAT);
2186 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head);
2187 F_SIZECODE = FD_SIZECODE(_floppy);
2188 F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE;
2189 F_GAP = _floppy->fmt_gap;
2190 F_FILL = FD_FILL_BYTE;
2192 raw_cmd->kernel_data = floppy_track_buffer;
2193 raw_cmd->length = 4 * F_SECT_PER_TRACK;
2195 /* allow for about 30ms for data transport per track */
2196 head_shift = (F_SECT_PER_TRACK + 5) / 6;
2198 /* a ``cylinder'' is two tracks plus a little stepping time */
2199 track_shift = 2 * head_shift + 3;
2201 /* position of logical sector 1 on this track */
2202 n = (track_shift * format_req.track + head_shift * format_req.head)
2205 /* determine interleave */
2207 if (_floppy->fmt_gap < 0x22)
2210 /* initialize field */
2211 for (count = 0; count < F_SECT_PER_TRACK; ++count) {
2212 here[count].track = format_req.track;
2213 here[count].head = format_req.head;
2214 here[count].sect = 0;
2215 here[count].size = F_SIZECODE;
2217 /* place logical sectors */
2218 for (count = 1; count <= F_SECT_PER_TRACK; ++count) {
2219 here[n].sect = count;
2220 n = (n + il) % F_SECT_PER_TRACK;
2221 if (here[n].sect) { /* sector busy, find next free sector */
2223 if (n >= F_SECT_PER_TRACK) {
2224 n -= F_SECT_PER_TRACK;
2225 while (here[n].sect)
2230 if (_floppy->stretch & FD_ZEROBASED) {
2231 for (count = 0; count < F_SECT_PER_TRACK; count++)
2236 static void redo_format(void)
2239 setup_format_params(format_req.track << STRETCH(_floppy));
2241 debugt("queue format request");
2244 static struct cont_t format_cont = {
2245 .interrupt = format_interrupt,
2246 .redo = redo_format,
2247 .error = bad_flp_intr,
2248 .done = generic_done
2251 static int do_format(int drive, struct format_descr *tmp_format_req)
2258 _floppy->track > DP->tracks ||
2259 tmp_format_req->track >= _floppy->track ||
2260 tmp_format_req->head >= _floppy->head ||
2261 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
2262 !_floppy->fmt_gap) {
2263 process_fd_request();
2266 format_req = *tmp_format_req;
2268 cont = &format_cont;
2269 errors = &format_errors;
2271 process_fd_request();
2276 * Buffer read/write and support
2277 * =============================
2280 static void floppy_end_request(struct request *req, int uptodate)
2282 unsigned int nr_sectors = current_count_sectors;
2284 /* current_count_sectors can be zero if transfer failed */
2286 nr_sectors = req->current_nr_sectors;
2287 if (end_that_request_first(req, uptodate, nr_sectors))
2289 add_disk_randomness(req->rq_disk);
2290 floppy_off((long)req->rq_disk->private_data);
2291 blkdev_dequeue_request(req);
2292 end_that_request_last(req, uptodate);
2294 /* We're done with the request */
2298 /* new request_done. Can handle physical sectors which are smaller than a
2300 static void request_done(int uptodate)
2302 struct request_queue *q = floppy_queue;
2303 struct request *req = current_req;
2304 unsigned long flags;
2308 reschedule_timeout(MAXTIMEOUT, "request done %d", uptodate);
2311 printk("floppy.c: no request in request_done\n");
2316 /* maintain values for invalidation on geometry
2318 block = current_count_sectors + req->sector;
2319 INFBOUND(DRS->maxblock, block);
2320 if (block > _floppy->sect)
2323 /* unlock chained buffers */
2324 spin_lock_irqsave(q->queue_lock, flags);
2325 floppy_end_request(req, 1);
2326 spin_unlock_irqrestore(q->queue_lock, flags);
2328 if (rq_data_dir(req) == WRITE) {
2329 /* record write error information */
2330 DRWE->write_errors++;
2331 if (DRWE->write_errors == 1) {
2332 DRWE->first_error_sector = req->sector;
2333 DRWE->first_error_generation = DRS->generation;
2335 DRWE->last_error_sector = req->sector;
2336 DRWE->last_error_generation = DRS->generation;
2338 spin_lock_irqsave(q->queue_lock, flags);
2339 floppy_end_request(req, 0);
2340 spin_unlock_irqrestore(q->queue_lock, flags);
2344 /* Interrupt handler evaluating the result of the r/w operation */
2345 static void rw_interrupt(void)
2347 int nr_sectors, ssize, eoc, heads;
2350 /* some Toshiba floppy controllers occasionnally seem to
2351 * return bogus interrupts after read/write operations, which
2352 * can be recognized by a bad head number (>= 2) */
2356 if (!DRS->first_read_date)
2357 DRS->first_read_date = jiffies;
2372 nr_sectors = (((R_TRACK - TRACK) * heads +
2373 R_HEAD - HEAD) * SECT_PER_TRACK +
2374 R_SECTOR - SECTOR + eoc) << SIZECODE >> 2;
2376 #ifdef FLOPPY_SANITY_CHECK
2377 if (nr_sectors / ssize >
2378 (in_sector_offset + current_count_sectors + ssize - 1) / ssize) {
2379 DPRINT("long rw: %x instead of %lx\n",
2380 nr_sectors, current_count_sectors);
2381 printk("rs=%d s=%d\n", R_SECTOR, SECTOR);
2382 printk("rh=%d h=%d\n", R_HEAD, HEAD);
2383 printk("rt=%d t=%d\n", R_TRACK, TRACK);
2384 printk("heads=%d eoc=%d\n", heads, eoc);
2385 printk("spt=%d st=%d ss=%d\n", SECT_PER_TRACK,
2387 printk("in_sector_offset=%d\n", in_sector_offset);
2391 nr_sectors -= in_sector_offset;
2392 INFBOUND(nr_sectors, 0);
2393 SUPBOUND(current_count_sectors, nr_sectors);
2395 switch (interpret_errors()) {
2400 if (!current_count_sectors) {
2407 if (!current_count_sectors) {
2411 current_type[current_drive] = _floppy;
2412 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2417 if (DP->flags & FTD_MSG)
2418 DPRINT("Auto-detected floppy type %s in fd%d\n",
2419 _floppy->name, current_drive);
2420 current_type[current_drive] = _floppy;
2421 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2425 if (CT(COMMAND) != FD_READ ||
2426 raw_cmd->kernel_data == current_req->buffer) {
2427 /* transfer directly from buffer */
2429 } else if (CT(COMMAND) == FD_READ) {
2430 buffer_track = raw_cmd->track;
2431 buffer_drive = current_drive;
2432 INFBOUND(buffer_max, nr_sectors + fsector_t);
2437 /* Compute maximal contiguous buffer size. */
2438 static int buffer_chain_size(void)
2442 struct req_iterator iter;
2445 base = bio_data(current_req->bio);
2448 rq_for_each_segment(bv, current_req, iter) {
2449 if (page_address(bv->bv_page) + bv->bv_offset != base + size)
2458 /* Compute the maximal transfer size */
2459 static int transfer_size(int ssize, int max_sector, int max_size)
2461 SUPBOUND(max_sector, fsector_t + max_size);
2464 max_sector -= (max_sector % _floppy->sect) % ssize;
2466 /* transfer size, beginning not aligned */
2467 current_count_sectors = max_sector - fsector_t;
2473 * Move data from/to the track buffer to/from the buffer cache.
2475 static void copy_buffer(int ssize, int max_sector, int max_sector_2)
2477 int remaining; /* number of transferred 512-byte sectors */
2479 char *buffer, *dma_buffer;
2481 struct req_iterator iter;
2483 max_sector = transfer_size(ssize,
2484 min(max_sector, max_sector_2),
2485 current_req->nr_sectors);
2487 if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
2488 buffer_max > fsector_t + current_req->nr_sectors)
2489 current_count_sectors = min_t(int, buffer_max - fsector_t,
2490 current_req->nr_sectors);
2492 remaining = current_count_sectors << 9;
2493 #ifdef FLOPPY_SANITY_CHECK
2494 if ((remaining >> 9) > current_req->nr_sectors &&
2495 CT(COMMAND) == FD_WRITE) {
2496 DPRINT("in copy buffer\n");
2497 printk("current_count_sectors=%ld\n", current_count_sectors);
2498 printk("remaining=%d\n", remaining >> 9);
2499 printk("current_req->nr_sectors=%ld\n",
2500 current_req->nr_sectors);
2501 printk("current_req->current_nr_sectors=%u\n",
2502 current_req->current_nr_sectors);
2503 printk("max_sector=%d\n", max_sector);
2504 printk("ssize=%d\n", ssize);
2508 buffer_max = max(max_sector, buffer_max);
2510 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
2512 size = current_req->current_nr_sectors << 9;
2514 rq_for_each_segment(bv, current_req, iter) {
2519 SUPBOUND(size, remaining);
2521 buffer = page_address(bv->bv_page) + bv->bv_offset;
2522 #ifdef FLOPPY_SANITY_CHECK
2523 if (dma_buffer + size >
2524 floppy_track_buffer + (max_buffer_sectors << 10) ||
2525 dma_buffer < floppy_track_buffer) {
2526 DPRINT("buffer overrun in copy buffer %d\n",
2527 (int)((floppy_track_buffer -
2529 printk("fsector_t=%d buffer_min=%d\n",
2530 fsector_t, buffer_min);
2531 printk("current_count_sectors=%ld\n",
2532 current_count_sectors);
2533 if (CT(COMMAND) == FD_READ)
2535 if (CT(COMMAND) == FD_WRITE)
2539 if (((unsigned long)buffer) % 512)
2540 DPRINT("%p buffer not aligned\n", buffer);
2542 if (CT(COMMAND) == FD_READ)
2543 memcpy(buffer, dma_buffer, size);
2545 memcpy(dma_buffer, buffer, size);
2550 #ifdef FLOPPY_SANITY_CHECK
2553 max_sector -= remaining >> 9;
2554 DPRINT("weirdness: remaining %d\n", remaining >> 9);
2560 static inline int check_dma_crossing(char *start,
2561 unsigned long length, char *message)
2563 if (CROSS_64KB(start, length)) {
2564 printk("DMA xfer crosses 64KB boundary in %s %p-%p\n",
2565 message, start, start + length);
2572 /* work around a bug in pseudo DMA
2573 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2574 * sending data. Hence we need a different way to signal the
2575 * transfer length: We use SECT_PER_TRACK. Unfortunately, this
2576 * does not work with MT, hence we can only transfer one head at
2579 static void virtualdmabug_workaround(void)
2581 int hard_sectors, end_sector;
2583 if (CT(COMMAND) == FD_WRITE) {
2584 COMMAND &= ~0x80; /* switch off multiple track mode */
2586 hard_sectors = raw_cmd->length >> (7 + SIZECODE);
2587 end_sector = SECTOR + hard_sectors - 1;
2588 #ifdef FLOPPY_SANITY_CHECK
2589 if (end_sector > SECT_PER_TRACK) {
2590 printk("too many sectors %d > %d\n",
2591 end_sector, SECT_PER_TRACK);
2595 SECT_PER_TRACK = end_sector; /* make sure SECT_PER_TRACK points
2596 * to end of transfer */
2601 * Formulate a read/write request.
2602 * this routine decides where to load the data (directly to buffer, or to
2603 * tmp floppy area), how much data to load (the size of the buffer, the whole
2604 * track, or a single sector)
2605 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2606 * allocation on the fly, it should be done here. No other part should need
2610 static int make_raw_rw_request(void)
2612 int aligned_sector_t;
2613 int max_sector, max_size, tracksize, ssize;
2615 if (max_buffer_sectors == 0) {
2616 printk("VFS: Block I/O scheduled on unopened device\n");
2620 set_fdc((long)current_req->rq_disk->private_data);
2622 raw_cmd = &default_raw_cmd;
2623 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK |
2625 raw_cmd->cmd_count = NR_RW;
2626 if (rq_data_dir(current_req) == READ) {
2627 raw_cmd->flags |= FD_RAW_READ;
2628 COMMAND = FM_MODE(_floppy, FD_READ);
2629 } else if (rq_data_dir(current_req) == WRITE) {
2630 raw_cmd->flags |= FD_RAW_WRITE;
2631 COMMAND = FM_MODE(_floppy, FD_WRITE);
2633 DPRINT("make_raw_rw_request: unknown command\n");
2637 max_sector = _floppy->sect * _floppy->head;
2639 TRACK = (int)current_req->sector / max_sector;
2640 fsector_t = (int)current_req->sector % max_sector;
2641 if (_floppy->track && TRACK >= _floppy->track) {
2642 if (current_req->current_nr_sectors & 1) {
2643 current_count_sectors = 1;
2648 HEAD = fsector_t / _floppy->sect;
2650 if (((_floppy->stretch & (FD_SWAPSIDES | FD_ZEROBASED)) ||
2651 TESTF(FD_NEED_TWADDLE)) && fsector_t < _floppy->sect)
2652 max_sector = _floppy->sect;
2654 /* 2M disks have phantom sectors on the first track */
2655 if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) {
2656 max_sector = 2 * _floppy->sect / 3;
2657 if (fsector_t >= max_sector) {
2658 current_count_sectors =
2659 min_t(int, _floppy->sect - fsector_t,
2660 current_req->nr_sectors);
2665 SIZECODE = FD_SIZECODE(_floppy);
2666 raw_cmd->rate = _floppy->rate & 0x43;
2667 if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2)
2674 raw_cmd->track = TRACK << STRETCH(_floppy);
2675 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD);
2678 SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
2679 SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) +
2680 ((_floppy->stretch & FD_ZEROBASED) ? 0 : 1);
2682 /* tracksize describes the size which can be filled up with sectors
2685 tracksize = _floppy->sect - _floppy->sect % ssize;
2686 if (tracksize < _floppy->sect) {
2688 if (tracksize <= fsector_t % _floppy->sect)
2691 /* if we are beyond tracksize, fill up using smaller sectors */
2692 while (tracksize <= fsector_t % _floppy->sect) {
2693 while (tracksize + ssize > _floppy->sect) {
2701 max_sector = HEAD * _floppy->sect + tracksize;
2702 } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) {
2703 max_sector = _floppy->sect;
2704 } else if (!HEAD && CT(COMMAND) == FD_WRITE) {
2705 /* for virtual DMA bug workaround */
2706 max_sector = _floppy->sect;
2709 in_sector_offset = (fsector_t % _floppy->sect) % ssize;
2710 aligned_sector_t = fsector_t - in_sector_offset;
2711 max_size = current_req->nr_sectors;
2712 if ((raw_cmd->track == buffer_track) &&
2713 (current_drive == buffer_drive) &&
2714 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
2715 /* data already in track buffer */
2716 if (CT(COMMAND) == FD_READ) {
2717 copy_buffer(1, max_sector, buffer_max);
2720 } else if (in_sector_offset || current_req->nr_sectors < ssize) {
2721 if (CT(COMMAND) == FD_WRITE) {
2722 if (fsector_t + current_req->nr_sectors > ssize &&
2723 fsector_t + current_req->nr_sectors < ssize + ssize)
2724 max_size = ssize + ssize;
2728 raw_cmd->flags &= ~FD_RAW_WRITE;
2729 raw_cmd->flags |= FD_RAW_READ;
2730 COMMAND = FM_MODE(_floppy, FD_READ);
2731 } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) {
2732 unsigned long dma_limit;
2733 int direct, indirect;
2736 transfer_size(ssize, max_sector,
2737 max_buffer_sectors * 2) - fsector_t;
2740 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2741 * on a 64 bit machine!
2743 max_size = buffer_chain_size();
2746 ((unsigned long)current_req->buffer)) >> 9;
2747 if ((unsigned long)max_size > dma_limit) {
2748 max_size = dma_limit;
2750 /* 64 kb boundaries */
2751 if (CROSS_64KB(current_req->buffer, max_size << 9))
2753 ((unsigned long)current_req->buffer) %
2755 direct = transfer_size(ssize, max_sector, max_size) - fsector_t;
2757 * We try to read tracks, but if we get too many errors, we
2758 * go back to reading just one sector at a time.
2760 * This means we should be able to read a sector even if there
2761 * are other bad sectors on this track.
2764 (indirect * 2 > direct * 3 &&
2765 *errors < DP->max_errors.read_track &&
2766 /*!TESTF(FD_NEED_TWADDLE) && */
2768 || (DP->read_track & (1 << DRS->probed_format)))))) {
2769 max_size = current_req->nr_sectors;
2771 raw_cmd->kernel_data = current_req->buffer;
2772 raw_cmd->length = current_count_sectors << 9;
2773 if (raw_cmd->length == 0) {
2775 ("zero dma transfer attempted from make_raw_request\n");
2776 DPRINT("indirect=%d direct=%d fsector_t=%d",
2777 indirect, direct, fsector_t);
2780 /* check_dma_crossing(raw_cmd->kernel_data,
2782 "end of make_raw_request [1]");*/
2784 virtualdmabug_workaround();
2789 if (CT(COMMAND) == FD_READ)
2790 max_size = max_sector; /* unbounded */
2792 /* claim buffer track if needed */
2793 if (buffer_track != raw_cmd->track || /* bad track */
2794 buffer_drive != current_drive || /* bad drive */
2795 fsector_t > buffer_max ||
2796 fsector_t < buffer_min ||
2797 ((CT(COMMAND) == FD_READ ||
2798 (!in_sector_offset && current_req->nr_sectors >= ssize)) &&
2799 max_sector > 2 * max_buffer_sectors + buffer_min &&
2800 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)
2801 /* not enough space */
2804 buffer_drive = current_drive;
2805 buffer_max = buffer_min = aligned_sector_t;
2807 raw_cmd->kernel_data = floppy_track_buffer +
2808 ((aligned_sector_t - buffer_min) << 9);
2810 if (CT(COMMAND) == FD_WRITE) {
2811 /* copy write buffer to track buffer.
2812 * if we get here, we know that the write
2813 * is either aligned or the data already in the buffer
2814 * (buffer will be overwritten) */
2815 #ifdef FLOPPY_SANITY_CHECK
2816 if (in_sector_offset && buffer_track == -1)
2817 DPRINT("internal error offset !=0 on write\n");
2819 buffer_track = raw_cmd->track;
2820 buffer_drive = current_drive;
2821 copy_buffer(ssize, max_sector,
2822 2 * max_buffer_sectors + buffer_min);
2824 transfer_size(ssize, max_sector,
2825 2 * max_buffer_sectors + buffer_min -
2828 /* round up current_count_sectors to get dma xfer size */
2829 raw_cmd->length = in_sector_offset + current_count_sectors;
2830 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1;
2831 raw_cmd->length <<= 9;
2832 #ifdef FLOPPY_SANITY_CHECK
2833 /*check_dma_crossing(raw_cmd->kernel_data, raw_cmd->length,
2834 "end of make_raw_request"); */
2835 if ((raw_cmd->length < current_count_sectors << 9) ||
2836 (raw_cmd->kernel_data != current_req->buffer &&
2837 CT(COMMAND) == FD_WRITE &&
2838 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
2839 aligned_sector_t < buffer_min)) ||
2840 raw_cmd->length % (128 << SIZECODE) ||
2841 raw_cmd->length <= 0 || current_count_sectors <= 0) {
2842 DPRINT("fractionary current count b=%lx s=%lx\n",
2843 raw_cmd->length, current_count_sectors);
2844 if (raw_cmd->kernel_data != current_req->buffer)
2845 printk("addr=%d, length=%ld\n",
2846 (int)((raw_cmd->kernel_data -
2847 floppy_track_buffer) >> 9),
2848 current_count_sectors);
2849 printk("st=%d ast=%d mse=%d msi=%d\n",
2850 fsector_t, aligned_sector_t, max_sector, max_size);
2851 printk("ssize=%x SIZECODE=%d\n", ssize, SIZECODE);
2852 printk("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2853 COMMAND, SECTOR, HEAD, TRACK);
2854 printk("buffer drive=%d\n", buffer_drive);
2855 printk("buffer track=%d\n", buffer_track);
2856 printk("buffer_min=%d\n", buffer_min);
2857 printk("buffer_max=%d\n", buffer_max);
2861 if (raw_cmd->kernel_data != current_req->buffer) {
2862 if (raw_cmd->kernel_data < floppy_track_buffer ||
2863 current_count_sectors < 0 ||
2864 raw_cmd->length < 0 ||
2865 raw_cmd->kernel_data + raw_cmd->length >
2866 floppy_track_buffer + (max_buffer_sectors << 10)) {
2867 DPRINT("buffer overrun in schedule dma\n");
2868 printk("fsector_t=%d buffer_min=%d current_count=%ld\n",
2869 fsector_t, buffer_min, raw_cmd->length >> 9);
2870 printk("current_count_sectors=%ld\n",
2871 current_count_sectors);
2872 if (CT(COMMAND) == FD_READ)
2874 if (CT(COMMAND) == FD_WRITE)
2878 } else if (raw_cmd->length > current_req->nr_sectors << 9 ||
2879 current_count_sectors > current_req->nr_sectors) {
2880 DPRINT("buffer overrun in direct transfer\n");
2882 } else if (raw_cmd->length < current_count_sectors << 9) {
2883 DPRINT("more sectors than bytes\n");
2884 printk("bytes=%ld\n", raw_cmd->length >> 9);
2885 printk("sectors=%ld\n", current_count_sectors);
2887 if (raw_cmd->length == 0) {
2888 DPRINT("zero dma transfer attempted from make_raw_request\n");
2893 virtualdmabug_workaround();
2897 static void redo_fd_request(void)
2899 #define REPEAT {request_done(0); continue; }
2904 if (current_drive < N_DRIVE)
2905 floppy_off(current_drive);
2909 struct request *req;
2911 spin_lock_irq(floppy_queue->queue_lock);
2912 req = elv_next_request(floppy_queue);
2913 spin_unlock_irq(floppy_queue->queue_lock);
2921 drive = (long)current_req->rq_disk->private_data;
2923 reschedule_timeout(current_reqD, "redo fd request", 0);
2926 raw_cmd = &default_raw_cmd;
2928 if (start_motor(redo_fd_request))
2930 disk_change(current_drive);
2931 if (test_bit(current_drive, &fake_change) ||
2932 TESTF(FD_DISK_CHANGED)) {
2933 DPRINT("disk absent or changed during operation\n");
2936 if (!_floppy) { /* Autodetection */
2938 DRS->probed_format = 0;
2939 if (next_valid_format()) {
2940 DPRINT("no autodetectable formats\n");
2947 floppy_type + DP->autodetect[DRS->probed_format];
2950 errors = &(current_req->errors);
2951 tmp = make_raw_rw_request();
2957 if (TESTF(FD_NEED_TWADDLE))
2959 schedule_bh(floppy_start);
2960 debugt("queue fd request");
2966 static struct cont_t rw_cont = {
2967 .interrupt = rw_interrupt,
2968 .redo = redo_fd_request,
2969 .error = bad_flp_intr,
2970 .done = request_done
2973 static void process_fd_request(void)
2976 schedule_bh(redo_fd_request);
2979 static void do_fd_request(struct request_queue * q)
2981 if (max_buffer_sectors == 0) {
2982 printk("VFS: do_fd_request called on non-open device\n");
2986 if (usage_count == 0) {
2987 printk("warning: usage count=0, current_req=%p exiting\n",
2989 printk("sect=%ld type=%x flags=%x\n", (long)current_req->sector,
2990 current_req->cmd_type, current_req->cmd_flags);
2993 if (test_bit(0, &fdc_busy)) {
2994 /* fdc busy, this new request will be treated when the
2995 current one is done */
2996 is_alive("do fd request, old request running");
2999 lock_fdc(MAXTIMEOUT, 0);
3000 process_fd_request();
3001 is_alive("do fd request");
3004 static struct cont_t poll_cont = {
3005 .interrupt = success_and_wakeup,
3006 .redo = floppy_ready,
3007 .error = generic_failure,
3008 .done = generic_done
3011 static int poll_drive(int interruptible, int flag)
3014 /* no auto-sense, just clear dcl */
3015 raw_cmd = &default_raw_cmd;
3016 raw_cmd->flags = flag;
3018 raw_cmd->cmd_count = 0;
3021 if (DP->flags & FD_DEBUG) {
3022 DPRINT("setting NEWCHANGE in poll_drive\n");
3025 SETF(FD_DISK_NEWCHANGE);
3031 * User triggered reset
3032 * ====================
3035 static void reset_intr(void)
3037 printk("weird, reset interrupt called\n");
3040 static struct cont_t reset_cont = {
3041 .interrupt = reset_intr,
3042 .redo = success_and_wakeup,
3043 .error = generic_failure,
3044 .done = generic_done
3047 static int user_reset_fdc(int drive, int arg, int interruptible)
3052 LOCK_FDC(drive, interruptible);
3053 if (arg == FD_RESET_ALWAYS)
3059 process_fd_request();
3064 * Misc Ioctl's and support
3065 * ========================
3067 static inline int fd_copyout(void __user *param, const void *address,
3070 return copy_to_user(param, address, size) ? -EFAULT : 0;
3073 static inline int fd_copyin(void __user *param, void *address, unsigned long size)
3075 return copy_from_user(address, param, size) ? -EFAULT : 0;
3078 #define _COPYOUT(x) (copy_to_user((void __user *)param, &(x), sizeof(x)) ? -EFAULT : 0)
3079 #define _COPYIN(x) (copy_from_user(&(x), (void __user *)param, sizeof(x)) ? -EFAULT : 0)
3081 #define COPYOUT(x) ECALL(_COPYOUT(x))
3082 #define COPYIN(x) ECALL(_COPYIN(x))
3084 static inline const char *drive_name(int type, int drive)
3086 struct floppy_struct *floppy;
3089 floppy = floppy_type + type;
3091 if (UDP->native_format)
3092 floppy = floppy_type + UDP->native_format;
3097 return floppy->name;
3103 static void raw_cmd_done(int flag)
3108 raw_cmd->flags |= FD_RAW_FAILURE;
3109 raw_cmd->flags |= FD_RAW_HARDFAILURE;
3111 raw_cmd->reply_count = inr;
3112 if (raw_cmd->reply_count > MAX_REPLIES)
3113 raw_cmd->reply_count = 0;
3114 for (i = 0; i < raw_cmd->reply_count; i++)
3115 raw_cmd->reply[i] = reply_buffer[i];
3117 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3118 unsigned long flags;
3119 flags = claim_dma_lock();
3120 raw_cmd->length = fd_get_dma_residue();
3121 release_dma_lock(flags);
3124 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
3125 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
3126 raw_cmd->flags |= FD_RAW_FAILURE;
3128 if (disk_change(current_drive))
3129 raw_cmd->flags |= FD_RAW_DISK_CHANGE;
3131 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
3132 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
3133 motor_off_callback(current_drive);
3135 if (raw_cmd->next &&
3136 (!(raw_cmd->flags & FD_RAW_FAILURE) ||
3137 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
3138 ((raw_cmd->flags & FD_RAW_FAILURE) ||
3139 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) {
3140 raw_cmd = raw_cmd->next;
3147 static struct cont_t raw_cmd_cont = {
3148 .interrupt = success_and_wakeup,
3149 .redo = floppy_start,
3150 .error = generic_failure,
3151 .done = raw_cmd_done
3154 static inline int raw_cmd_copyout(int cmd, char __user *param,
3155 struct floppy_raw_cmd *ptr)
3161 param += sizeof(struct floppy_raw_cmd);
3162 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) {
3163 if (ptr->length >= 0
3164 && ptr->length <= ptr->buffer_length)
3166 (ptr->data, ptr->kernel_data,
3167 ptr->buffer_length - ptr->length));
3174 static void raw_cmd_free(struct floppy_raw_cmd **ptr)
3176 struct floppy_raw_cmd *next, *this;
3181 if (this->buffer_length) {
3182 fd_dma_mem_free((unsigned long)this->kernel_data,
3183 this->buffer_length);
3184 this->buffer_length = 0;
3192 static inline int raw_cmd_copyin(int cmd, char __user *param,
3193 struct floppy_raw_cmd **rcmd)
3195 struct floppy_raw_cmd *ptr;
3201 ptr = (struct floppy_raw_cmd *)
3202 kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
3208 ptr->buffer_length = 0;
3209 param += sizeof(struct floppy_raw_cmd);
3210 if (ptr->cmd_count > 33)
3211 /* the command may now also take up the space
3212 * initially intended for the reply & the
3213 * reply count. Needed for long 82078 commands
3214 * such as RESTORE, which takes ... 17 command
3215 * bytes. Murphy's law #137: When you reserve
3216 * 16 bytes for a structure, you'll one day
3217 * discover that you really need 17...
3221 for (i = 0; i < 16; i++)
3223 ptr->resultcode = 0;
3224 ptr->kernel_data = NULL;
3226 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3227 if (ptr->length <= 0)
3230 (char *)fd_dma_mem_alloc(ptr->length);
3231 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
3232 if (!ptr->kernel_data)
3234 ptr->buffer_length = ptr->length;
3236 if (ptr->flags & FD_RAW_WRITE)
3237 ECALL(fd_copyin(ptr->data, ptr->kernel_data,
3239 rcmd = &(ptr->next);
3240 if (!(ptr->flags & FD_RAW_MORE))
3246 static int raw_cmd_ioctl(int cmd, void __user *param)
3248 int drive, ret, ret2;
3249 struct floppy_raw_cmd *my_raw_cmd;
3251 if (FDCS->rawcmd <= 1)
3253 for (drive = 0; drive < N_DRIVE; drive++) {
3254 if (FDC(drive) != fdc)
3256 if (drive == current_drive) {
3257 if (UDRS->fd_ref > 1) {
3261 } else if (UDRS->fd_ref) {
3270 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
3272 raw_cmd_free(&my_raw_cmd);
3276 raw_cmd = my_raw_cmd;
3277 cont = &raw_cmd_cont;
3278 ret = wait_til_done(floppy_start, 1);
3280 if (DP->flags & FD_DEBUG) {
3281 DPRINT("calling disk change from raw_cmd ioctl\n");
3285 if (ret != -EINTR && FDCS->reset)
3288 DRS->track = NO_TRACK;
3290 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
3293 raw_cmd_free(&my_raw_cmd);
3297 static int invalidate_drive(struct block_device *bdev)
3299 /* invalidate the buffer track to force a reread */
3300 set_bit((long)bdev->bd_disk->private_data, &fake_change);
3301 process_fd_request();
3302 check_disk_change(bdev);
3306 static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
3307 int drive, int type, struct block_device *bdev)
3311 /* sanity checking for parameters. */
3314 g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) ||
3315 /* check if reserved bits are set */
3316 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_ZEROBASED)) != 0)
3319 if (!capable(CAP_SYS_ADMIN))
3321 mutex_lock(&open_lock);
3323 floppy_type[type] = *g;
3324 floppy_type[type].name = "user format";
3325 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
3326 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] =
3327 floppy_type[type].size + 1;
3328 process_fd_request();
3329 for (cnt = 0; cnt < N_DRIVE; cnt++) {
3330 struct block_device *bdev = opened_bdev[cnt];
3331 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
3333 __invalidate_device(bdev);
3335 mutex_unlock(&open_lock);
3339 if (cmd != FDDEFPRM)
3340 /* notice a disk change immediately, else
3341 * we lose our settings immediately*/
3342 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3343 oldStretch = g->stretch;
3344 user_params[drive] = *g;
3345 if (buffer_drive == drive)
3346 SUPBOUND(buffer_max, user_params[drive].sect);
3347 current_type[drive] = &user_params[drive];
3348 floppy_sizes[drive] = user_params[drive].size;
3349 if (cmd == FDDEFPRM)
3350 DRS->keep_data = -1;
3353 /* invalidation. Invalidate only when needed, i.e.
3354 * when there are already sectors in the buffer cache
3355 * whose number will change. This is useful, because
3356 * mtools often changes the geometry of the disk after
3357 * looking at the boot block */
3358 if (DRS->maxblock > user_params[drive].sect ||
3360 ((user_params[drive].sect ^ oldStretch) &
3361 (FD_SWAPSIDES | FD_ZEROBASED)))
3362 invalidate_drive(bdev);
3364 process_fd_request();
3369 /* handle obsolete ioctl's */
3370 static int ioctl_table[] = {
3398 static inline int normalize_ioctl(int *cmd, int *size)
3402 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) {
3403 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) {
3404 *size = _IOC_SIZE(*cmd);
3405 *cmd = ioctl_table[i];
3406 if (*size > _IOC_SIZE(*cmd)) {
3407 printk("ioctl not yet supported\n");
3416 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
3419 *g = &floppy_type[type];
3422 CALL(poll_drive(0, 0));
3423 process_fd_request();
3424 *g = current_type[drive];
3431 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
3433 int drive = (long)bdev->bd_disk->private_data;
3434 int type = ITYPE(drive_state[drive].fd_device);
3435 struct floppy_struct *g;
3438 ret = get_floppy_geometry(drive, type, &g);
3442 geo->heads = g->head;
3443 geo->sectors = g->sect;
3444 geo->cylinders = g->track;
3448 static int fd_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
3449 unsigned long param)
3451 #define FD_IOCTL_ALLOWED ((filp) && (filp)->private_data)
3452 #define OUT(c,x) case c: outparam = (const char *) (x); break
3453 #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0
3455 int drive = (long)inode->i_bdev->bd_disk->private_data;
3456 int i, type = ITYPE(UDRS->fd_device);
3460 struct floppy_struct g; /* geometry */
3461 struct format_descr f;
3462 struct floppy_max_errors max_errors;
3463 struct floppy_drive_params dp;
3464 } inparam; /* parameters coming from user space */
3465 const char *outparam; /* parameters passed back to user space */
3467 /* convert compatibility eject ioctls into floppy eject ioctl.
3468 * We do this in order to provide a means to eject floppy disks before
3469 * installing the new fdutils package */
3470 if (cmd == CDROMEJECT || /* CD-ROM eject */
3471 cmd == 0x6470 /* SunOS floppy eject */ ) {
3472 DPRINT("obsolete eject ioctl\n");
3473 DPRINT("please use floppycontrol --eject\n");
3477 /* convert the old style command into a new style command */
3478 if ((cmd & 0xff00) == 0x0200) {
3479 ECALL(normalize_ioctl(&cmd, &size));
3483 /* permission checks */
3484 if (((cmd & 0x40) && !FD_IOCTL_ALLOWED) ||
3485 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
3489 CLEARSTRUCT(&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 */
3500 /* do the actual eject. Fails on
3501 * non-Sparc architectures */
3502 ret = fd_eject(UNIT(drive));
3504 USETF(FD_DISK_CHANGED);
3506 process_fd_request();
3510 current_type[drive] = NULL;
3511 floppy_sizes[drive] = MAX_DISK_SIZE << 1;
3512 UDRS->keep_data = 0;
3513 return invalidate_drive(inode->i_bdev);
3516 return set_geometry(cmd, &inparam.g,
3517 drive, type, inode->i_bdev);
3519 ECALL(get_floppy_geometry(drive, type,
3520 (struct floppy_struct **)
3525 UDP->flags |= FTD_MSG;
3528 UDP->flags &= ~FTD_MSG;
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);
3548 return invalidate_drive(inode->i_bdev);
3550 case FDSETEMSGTRESH:
3551 UDP->max_errors.reporting =
3552 (unsigned short)(param & 0x0f);
3554 OUT(FDGETMAXERRS, &UDP->max_errors);
3555 IN(FDSETMAXERRS, &UDP->max_errors, max_errors);
3558 outparam = drive_name(type, drive);
3559 SUPBOUND(size, strlen(outparam) + 1);
3562 IN(FDSETDRVPRM, UDP, dp);
3563 OUT(FDGETDRVPRM, UDP);
3567 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3568 process_fd_request();
3570 OUT(FDGETDRVSTAT, UDRS);
3573 return user_reset_fdc(drive, (int)param, 1);
3575 OUT(FDGETFDCSTAT, UFDCS);
3580 OUT(FDWERRORGET, UDRWE);
3587 CALL(i = raw_cmd_ioctl(cmd, (void __user *)param));
3588 process_fd_request();
3594 process_fd_request();
3601 if (_IOC_DIR(cmd) & _IOC_READ)
3602 return fd_copyout((void __user *)param, outparam, size);
3609 static void __init config_types(void)
3614 /* read drive info out of physical CMOS */
3617 UDP->cmos = FLOPPY0_TYPE;
3619 if (!UDP->cmos && FLOPPY1_TYPE)
3620 UDP->cmos = FLOPPY1_TYPE;
3623 /* additional physical CMOS drive detection should go here */
3625 for (drive = 0; drive < N_DRIVE; drive++) {
3626 unsigned int type = UDP->cmos;
3627 struct floppy_drive_params *params;
3628 const char *name = NULL;
3629 static char temparea[32];
3631 if (type < ARRAY_SIZE(default_drive_params)) {
3632 params = &default_drive_params[type].params;
3634 name = default_drive_params[type].name;
3635 allowed_drive_mask |= 1 << drive;
3637 allowed_drive_mask &= ~(1 << drive);
3639 params = &default_drive_params[0].params;
3640 sprintf(temparea, "unknown type %d (usb?)", type);
3644 const char *prepend = ",";
3646 prepend = KERN_INFO "Floppy drive(s):";
3649 printk("%s fd%d is %s", prepend, drive, name);
3657 static int floppy_release(struct inode *inode, struct file *filp)
3659 int drive = (long)inode->i_bdev->bd_disk->private_data;
3661 mutex_lock(&open_lock);
3662 if (UDRS->fd_ref < 0)
3664 else if (!UDRS->fd_ref--) {
3665 DPRINT("floppy_release with fd_ref == 0");
3669 opened_bdev[drive] = NULL;
3670 mutex_unlock(&open_lock);
3676 * floppy_open check for aliasing (/dev/fd0 can be the same as
3677 * /dev/PS0 etc), and disallows simultaneous access to the same
3678 * drive with different device numbers.
3680 static int floppy_open(struct inode *inode, struct file *filp)
3682 int drive = (long)inode->i_bdev->bd_disk->private_data;
3688 filp->private_data = (void *)0;
3689 mutex_lock(&open_lock);
3690 old_dev = UDRS->fd_device;
3691 if (opened_bdev[drive] && opened_bdev[drive] != inode->i_bdev)
3694 if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) {
3695 USETF(FD_DISK_CHANGED);
3699 if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (filp->f_flags & O_EXCL)))
3702 if (filp->f_flags & O_EXCL)
3707 opened_bdev[drive] = inode->i_bdev;
3711 if (!floppy_track_buffer) {
3712 /* if opening an ED drive, reserve a big buffer,
3713 * else reserve a small one */
3714 if ((UDP->cmos == 6) || (UDP->cmos == 5))
3715 try = 64; /* Only 48 actually useful */
3717 try = 32; /* Only 24 actually useful */
3719 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3720 if (!tmp && !floppy_track_buffer) {
3721 try >>= 1; /* buffer only one side */
3723 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3725 if (!tmp && !floppy_track_buffer) {
3726 fallback_on_nodma_alloc(&tmp, 2048 * try);
3728 if (!tmp && !floppy_track_buffer) {
3729 DPRINT("Unable to allocate DMA memory\n");
3732 if (floppy_track_buffer) {
3734 fd_dma_mem_free((unsigned long)tmp, try * 1024);
3736 buffer_min = buffer_max = -1;
3737 floppy_track_buffer = tmp;
3738 max_buffer_sectors = try;
3742 UDRS->fd_device = iminor(inode);
3743 set_capacity(disks[drive], floppy_sizes[iminor(inode)]);
3744 if (old_dev != -1 && old_dev != iminor(inode)) {
3745 if (buffer_drive == drive)
3749 /* Allow ioctls if we have write-permissions even if read-only open.
3750 * Needed so that programs such as fdrawcmd still can work on write
3751 * protected disks */
3752 if ((filp->f_mode & FMODE_WRITE) || !file_permission(filp, MAY_WRITE))
3753 filp->private_data = (void *)8;
3755 if (UFDCS->rawcmd == 1)
3758 if (!(filp->f_flags & O_NDELAY)) {
3759 if (filp->f_mode & 3) {
3760 UDRS->last_checked = 0;
3761 check_disk_change(inode->i_bdev);
3762 if (UTESTF(FD_DISK_CHANGED))
3766 if ((filp->f_mode & 2) && !(UTESTF(FD_DISK_WRITABLE)))
3769 mutex_unlock(&open_lock);
3772 if (UDRS->fd_ref < 0)
3777 opened_bdev[drive] = NULL;
3779 mutex_unlock(&open_lock);
3784 * Check if the disk has been changed or if a change has been faked.
3786 static int check_floppy_change(struct gendisk *disk)
3788 int drive = (long)disk->private_data;
3790 if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY))
3793 if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) {
3796 process_fd_request();
3799 if (UTESTF(FD_DISK_CHANGED) ||
3800 UTESTF(FD_VERIFY) ||
3801 test_bit(drive, &fake_change) ||
3802 (!ITYPE(UDRS->fd_device) && !current_type[drive]))
3808 * This implements "read block 0" for floppy_revalidate().
3809 * Needed for format autodetection, checking whether there is
3810 * a disk in the drive, and whether that disk is writable.
3813 static void floppy_rb0_complete(struct bio *bio,
3816 complete((struct completion *)bio->bi_private);
3819 static int __floppy_read_block_0(struct block_device *bdev)
3822 struct bio_vec bio_vec;
3823 struct completion complete;
3827 page = alloc_page(GFP_NOIO);
3829 process_fd_request();
3833 size = bdev->bd_block_size;
3838 bio.bi_io_vec = &bio_vec;
3839 bio_vec.bv_page = page;
3840 bio_vec.bv_len = size;
3841 bio_vec.bv_offset = 0;
3847 init_completion(&complete);
3848 bio.bi_private = &complete;
3849 bio.bi_end_io = floppy_rb0_complete;
3851 submit_bio(READ, &bio);
3852 generic_unplug_device(bdev_get_queue(bdev));
3853 process_fd_request();
3854 wait_for_completion(&complete);
3861 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
3862 * the bootblock (block 0). "Autodetection" is also needed to check whether
3863 * there is a disk in the drive at all... Thus we also do it for fixed
3864 * geometry formats */
3865 static int floppy_revalidate(struct gendisk *disk)
3867 int drive = (long)disk->private_data;
3868 #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device))
3872 if (UTESTF(FD_DISK_CHANGED) ||
3873 UTESTF(FD_VERIFY) || test_bit(drive, &fake_change) || NO_GEOM) {
3874 if (usage_count == 0) {
3875 printk("VFS: revalidate called on non-open device.\n");
3879 cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY);
3880 if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)) {
3881 process_fd_request(); /*already done by another thread */
3886 if (buffer_drive == drive)
3888 clear_bit(drive, &fake_change);
3889 UCLEARF(FD_DISK_CHANGED);
3894 res = __floppy_read_block_0(opened_bdev[drive]);
3897 poll_drive(0, FD_RAW_NEED_DISK);
3898 process_fd_request();
3901 set_capacity(disk, floppy_sizes[UDRS->fd_device]);
3905 static struct block_device_operations floppy_fops = {
3906 .owner = THIS_MODULE,
3907 .open = floppy_open,
3908 .release = floppy_release,
3910 .getgeo = fd_getgeo,
3911 .media_changed = check_floppy_change,
3912 .revalidate_disk = floppy_revalidate,
3916 * Floppy Driver initialization
3917 * =============================
3920 /* Determine the floppy disk controller type */
3921 /* This routine was written by David C. Niemi */
3922 static char __init get_fdc_version(void)
3926 output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */
3929 if ((r = result()) <= 0x00)
3930 return FDC_NONE; /* No FDC present ??? */
3931 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3932 printk(KERN_INFO "FDC %d is an 8272A\n", fdc);
3933 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
3937 ("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
3942 if (!fdc_configure()) {
3943 printk(KERN_INFO "FDC %d is an 82072\n", fdc);
3944 return FDC_82072; /* 82072 doesn't know CONFIGURE */
3947 output_byte(FD_PERPENDICULAR);
3948 if (need_more_output() == MORE_OUTPUT) {
3951 printk(KERN_INFO "FDC %d is an 82072A\n", fdc);
3952 return FDC_82072A; /* 82072A as found on Sparcs. */
3955 output_byte(FD_UNLOCK);
3957 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3958 printk(KERN_INFO "FDC %d is a pre-1991 82077\n", fdc);
3959 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
3962 if ((r != 1) || (reply_buffer[0] != 0x00)) {
3963 printk("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
3967 output_byte(FD_PARTID);
3970 printk("FDC %d init: PARTID: unexpected return of %d bytes.\n",
3974 if (reply_buffer[0] == 0x80) {
3975 printk(KERN_INFO "FDC %d is a post-1991 82077\n", fdc);
3976 return FDC_82077; /* Revised 82077AA passes all the tests */
3978 switch (reply_buffer[0] >> 5) {
3980 /* Either a 82078-1 or a 82078SL running at 5Volt */
3981 printk(KERN_INFO "FDC %d is an 82078.\n", fdc);
3984 printk(KERN_INFO "FDC %d is a 44pin 82078\n", fdc);
3987 printk(KERN_INFO "FDC %d is a S82078B\n", fdc);
3990 printk(KERN_INFO "FDC %d is a National Semiconductor PC87306\n",
3995 "FDC %d init: 82078 variant with unknown PARTID=%d.\n",
3996 fdc, reply_buffer[0] >> 5);
3997 return FDC_82078_UNKN;
3999 } /* get_fdc_version */
4001 /* lilo configuration */
4003 static void __init floppy_set_flags(int *ints, int param, int param2)
4007 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4009 default_drive_params[i].params.flags |= param2;
4011 default_drive_params[i].params.flags &= ~param2;
4013 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param);
4016 static void __init daring(int *ints, int param, int param2)
4020 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4022 default_drive_params[i].params.select_delay = 0;
4023 default_drive_params[i].params.flags |=
4024 FD_SILENT_DCL_CLEAR;
4026 default_drive_params[i].params.select_delay =
4028 default_drive_params[i].params.flags &=
4029 ~FD_SILENT_DCL_CLEAR;
4032 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken");
4035 static void __init set_cmos(int *ints, int dummy, int dummy2)
4037 int current_drive = 0;
4040 DPRINT("wrong number of parameters for CMOS\n");
4043 current_drive = ints[1];
4044 if (current_drive < 0 || current_drive >= 8) {
4045 DPRINT("bad drive for set_cmos\n");
4049 if (current_drive >= 4 && !FDC2)
4053 DPRINT("setting CMOS code to %d\n", ints[2]);
4056 static struct param_table {
4058 void (*fn) (int *ints, int param, int param2);
4062 } config_params[] __initdata = {
4063 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4064 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4065 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0},
4066 {"irq", NULL, &FLOPPY_IRQ, 6, 0},
4067 {"dma", NULL, &FLOPPY_DMA, 2, 0},
4068 {"daring", daring, NULL, 1, 0},
4070 {"two_fdc", NULL, &FDC2, 0x370, 0},
4071 {"one_fdc", NULL, &FDC2, 0, 0},
4073 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL},
4074 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL},
4075 {"messages", floppy_set_flags, NULL, 1, FTD_MSG},
4076 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR},
4077 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG},
4078 {"nodma", NULL, &can_use_virtual_dma, 1, 0},
4079 {"omnibook", NULL, &can_use_virtual_dma, 1, 0},
4080 {"yesdma", NULL, &can_use_virtual_dma, 0, 0},
4081 {"fifo_depth", NULL, &fifo_depth, 0xa, 0},
4082 {"nofifo", NULL, &no_fifo, 0x20, 0},
4083 {"usefifo", NULL, &no_fifo, 0, 0},
4084 {"cmos", set_cmos, NULL, 0, 0},
4085 {"slow", NULL, &slow_floppy, 1, 0},
4086 {"unexpected_interrupts", NULL, &print_unex, 1, 0},
4087 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0},
4088 {"L40SX", NULL, &print_unex, 0, 0}
4093 static int __init floppy_setup(char *str)
4099 str = get_options(str, ARRAY_SIZE(ints), ints);
4101 for (i = 0; i < ARRAY_SIZE(config_params); i++) {
4102 if (strcmp(str, config_params[i].name) == 0) {
4106 param = config_params[i].def_param;
4107 if (config_params[i].fn)
4110 config_params[i].param2);
4111 if (config_params[i].var) {
4112 DPRINT("%s=%d\n", str, param);
4113 *config_params[i].var = param;
4120 DPRINT("unknown floppy option [%s]\n", str);
4122 DPRINT("allowed options are:");
4123 for (i = 0; i < ARRAY_SIZE(config_params); i++)
4124 printk(" %s", config_params[i].name);
4127 DPRINT("botched floppy option\n");
4128 DPRINT("Read Documentation/floppy.txt\n");
4132 static int have_no_fdc = -ENODEV;
4134 static ssize_t floppy_cmos_show(struct device *dev,
4135 struct device_attribute *attr, char *buf)
4137 struct platform_device *p;
4140 p = container_of(dev, struct platform_device,dev);
4142 return sprintf(buf, "%X\n", UDP->cmos);
4144 DEVICE_ATTR(cmos,S_IRUGO,floppy_cmos_show,NULL);
4146 static void floppy_device_release(struct device *dev)
4148 complete(&device_release);
4151 static struct platform_device floppy_device[N_DRIVE];
4153 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
4155 int drive = (*part & 3) | ((*part & 0x80) >> 5);
4156 if (drive >= N_DRIVE ||
4157 !(allowed_drive_mask & (1 << drive)) ||
4158 fdc_state[FDC(drive)].version == FDC_NONE)
4160 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type))
4163 return get_disk(disks[drive]);
4166 static int __init floppy_init(void)
4171 #if defined(CONFIG_PPC_MERGE)
4172 if (check_legacy_ioport(FDC1))
4178 for (dr = 0; dr < N_DRIVE; dr++) {
4179 disks[dr] = alloc_disk(1);
4185 disks[dr]->major = FLOPPY_MAJOR;
4186 disks[dr]->first_minor = TOMINOR(dr);
4187 disks[dr]->fops = &floppy_fops;
4188 sprintf(disks[dr]->disk_name, "fd%d", dr);
4190 init_timer(&motor_off_timer[dr]);
4191 motor_off_timer[dr].data = dr;
4192 motor_off_timer[dr].function = motor_off_callback;
4195 err = register_blkdev(FLOPPY_MAJOR, "fd");
4199 floppy_queue = blk_init_queue(do_fd_request, &floppy_lock);
4200 if (!floppy_queue) {
4202 goto out_unreg_blkdev;
4204 blk_queue_max_sectors(floppy_queue, 64);
4206 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
4207 floppy_find, NULL, NULL);
4209 for (i = 0; i < 256; i++)
4211 floppy_sizes[i] = floppy_type[ITYPE(i)].size;
4213 floppy_sizes[i] = MAX_DISK_SIZE << 1;
4215 reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT);
4218 for (i = 0; i < N_FDC; i++) {
4223 #if defined(__sparc__) || defined(__mc68000__)
4224 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4228 FDCS->version = FDC_82072A;
4232 use_virtual_dma = can_use_virtual_dma & 1;
4233 fdc_state[0].address = FDC1;
4234 if (fdc_state[0].address == -1) {
4235 del_timer(&fd_timeout);
4237 goto out_unreg_region;
4240 fdc_state[1].address = FDC2;
4243 fdc = 0; /* reset fdc in case of unexpected interrupt */
4244 err = floppy_grab_irq_and_dma();
4246 del_timer(&fd_timeout);
4248 goto out_unreg_region;
4251 /* initialise drive state */
4252 for (drive = 0; drive < N_DRIVE; drive++) {
4255 USETF(FD_DISK_NEWCHANGE);
4256 USETF(FD_DISK_CHANGED);
4258 UDRS->fd_device = -1;
4259 floppy_track_buffer = NULL;
4260 max_buffer_sectors = 0;
4263 * Small 10 msec delay to let through any interrupt that
4264 * initialization might have triggered, to not
4265 * confuse detection:
4269 for (i = 0; i < N_FDC; i++) {
4271 FDCS->driver_version = FD_DRIVER_VERSION;
4272 for (unit = 0; unit < 4; unit++)
4273 FDCS->track[unit] = 0;
4274 if (FDCS->address == -1)
4277 if (user_reset_fdc(-1, FD_RESET_ALWAYS, 0)) {
4278 /* free ioports reserved by floppy_grab_irq_and_dma() */
4279 release_region(FDCS->address + 2, 4);
4280 release_region(FDCS->address + 7, 1);
4282 FDCS->version = FDC_NONE;
4285 /* Try to determine the floppy controller type */
4286 FDCS->version = get_fdc_version();
4287 if (FDCS->version == FDC_NONE) {
4288 /* free ioports reserved by floppy_grab_irq_and_dma() */
4289 release_region(FDCS->address + 2, 4);
4290 release_region(FDCS->address + 7, 1);
4294 if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A)
4295 can_use_virtual_dma = 0;
4298 /* Not all FDCs seem to be able to handle the version command
4299 * properly, so force a reset for the standard FDC clones,
4300 * to avoid interrupt garbage.
4302 user_reset_fdc(-1, FD_RESET_ALWAYS, 0);
4305 del_timer(&fd_timeout);
4309 DPRINT("no floppy controllers found\n");
4311 goto out_flush_work;
4314 for (drive = 0; drive < N_DRIVE; drive++) {
4315 if (!(allowed_drive_mask & (1 << drive)))
4317 if (fdc_state[FDC(drive)].version == FDC_NONE)
4320 floppy_device[drive].name = floppy_device_name;
4321 floppy_device[drive].id = drive;
4322 floppy_device[drive].dev.release = floppy_device_release;
4324 err = platform_device_register(&floppy_device[drive]);
4326 goto out_flush_work;
4328 err = device_create_file(&floppy_device[drive].dev,&dev_attr_cmos);
4330 goto out_unreg_platform_dev;
4332 /* to be cleaned up... */
4333 disks[drive]->private_data = (void *)(long)drive;
4334 disks[drive]->queue = floppy_queue;
4335 disks[drive]->flags |= GENHD_FL_REMOVABLE;
4336 disks[drive]->driverfs_dev = &floppy_device[drive].dev;
4337 add_disk(disks[drive]);
4342 out_unreg_platform_dev:
4343 platform_device_unregister(&floppy_device[drive]);
4345 flush_scheduled_work();
4347 floppy_release_irq_and_dma();
4349 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4350 blk_cleanup_queue(floppy_queue);
4352 unregister_blkdev(FLOPPY_MAJOR, "fd");
4355 del_timer(&motor_off_timer[dr]);
4356 put_disk(disks[dr]);
4361 static DEFINE_SPINLOCK(floppy_usage_lock);
4363 static int floppy_grab_irq_and_dma(void)
4365 unsigned long flags;
4367 spin_lock_irqsave(&floppy_usage_lock, flags);
4368 if (usage_count++) {
4369 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4372 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4375 * We might have scheduled a free_irq(), wait it to
4378 flush_scheduled_work();
4380 if (fd_request_irq()) {
4381 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4383 spin_lock_irqsave(&floppy_usage_lock, flags);
4385 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4388 if (fd_request_dma()) {
4389 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4392 spin_lock_irqsave(&floppy_usage_lock, flags);
4394 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4398 for (fdc = 0; fdc < N_FDC; fdc++) {
4399 if (FDCS->address != -1) {
4400 if (!request_region(FDCS->address + 2, 4, "floppy")) {
4401 DPRINT("Floppy io-port 0x%04lx in use\n",
4405 if (!request_region(FDCS->address + 7, 1, "floppy DIR")) {
4406 DPRINT("Floppy io-port 0x%04lx in use\n",
4410 /* address + 6 is reserved, and may be taken by IDE.
4411 * Unfortunately, Adaptec doesn't know this :-(, */
4414 for (fdc = 0; fdc < N_FDC; fdc++) {
4415 if (FDCS->address != -1) {
4417 fd_outb(FDCS->dor, FD_DOR);
4421 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4423 for (fdc = 0; fdc < N_FDC; fdc++)
4424 if (FDCS->address != -1)
4425 fd_outb(FDCS->dor, FD_DOR);
4427 * The driver will try and free resources and relies on us
4428 * to know if they were allocated or not.
4431 irqdma_allocated = 1;
4434 release_region(FDCS->address + 2, 4);
4438 while (--fdc >= 0) {
4439 release_region(FDCS->address + 2, 4);
4440 release_region(FDCS->address + 7, 1);
4442 spin_lock_irqsave(&floppy_usage_lock, flags);
4444 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4448 static void floppy_release_irq_and_dma(void)
4451 #ifdef FLOPPY_SANITY_CHECK
4457 unsigned long tmpaddr;
4458 unsigned long flags;
4460 spin_lock_irqsave(&floppy_usage_lock, flags);
4461 if (--usage_count) {
4462 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4465 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4466 if (irqdma_allocated) {
4470 irqdma_allocated = 0;
4476 floppy_enable_hlt();
4478 if (floppy_track_buffer && max_buffer_sectors) {
4479 tmpsize = max_buffer_sectors * 1024;
4480 tmpaddr = (unsigned long)floppy_track_buffer;
4481 floppy_track_buffer = NULL;
4482 max_buffer_sectors = 0;
4483 buffer_min = buffer_max = -1;
4484 fd_dma_mem_free(tmpaddr, tmpsize);
4486 #ifdef FLOPPY_SANITY_CHECK
4488 for (drive = 0; drive < N_FDC * 4; drive++)
4489 if (timer_pending(motor_off_timer + drive))
4490 printk("motor off timer %d still active\n", drive);
4493 if (timer_pending(&fd_timeout))
4494 printk("floppy timer still active:%s\n", timeout_message);
4495 if (timer_pending(&fd_timer))
4496 printk("auxiliary floppy timer still active\n");
4497 if (work_pending(&floppy_work))
4498 printk("work still pending\n");
4501 for (fdc = 0; fdc < N_FDC; fdc++)
4502 if (FDCS->address != -1) {
4503 release_region(FDCS->address + 2, 4);
4504 release_region(FDCS->address + 7, 1);
4511 static char *floppy;
4513 static void __init parse_floppy_cfg_string(char *cfg)
4518 for (ptr = cfg; *cfg && *cfg != ' ' && *cfg != '\t'; cfg++) ;
4528 int __init init_module(void)
4531 parse_floppy_cfg_string(floppy);
4532 return floppy_init();
4535 void cleanup_module(void)
4539 init_completion(&device_release);
4540 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4541 unregister_blkdev(FLOPPY_MAJOR, "fd");
4543 for (drive = 0; drive < N_DRIVE; drive++) {
4544 del_timer_sync(&motor_off_timer[drive]);
4546 if ((allowed_drive_mask & (1 << drive)) &&
4547 fdc_state[FDC(drive)].version != FDC_NONE) {
4548 del_gendisk(disks[drive]);
4549 device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
4550 platform_device_unregister(&floppy_device[drive]);
4552 put_disk(disks[drive]);
4555 del_timer_sync(&fd_timeout);
4556 del_timer_sync(&fd_timer);
4557 blk_cleanup_queue(floppy_queue);
4560 floppy_release_irq_and_dma();
4562 /* eject disk, if any */
4565 wait_for_completion(&device_release);
4568 module_param(floppy, charp, 0);
4569 module_param(FLOPPY_IRQ, int, 0);
4570 module_param(FLOPPY_DMA, int, 0);
4571 MODULE_AUTHOR("Alain L. Knaff");
4572 MODULE_SUPPORTED_DEVICE("fd");
4573 MODULE_LICENSE("GPL");
4577 __setup("floppy=", floppy_setup);
4578 module_init(floppy_init)
4581 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);