2 * linux/drivers/block/floppy.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 * Copyright (C) 1993, 1994 Alain Knaff
6 * Copyright (C) 1998 Alan Cox
10 * 02.12.91 - Changed to static variables to indicate need for reset
11 * and recalibrate. This makes some things easier (output_byte reset
12 * checking etc), and means less interrupt jumping in case of errors,
13 * so the code is hopefully easier to understand.
17 * This file is certainly a mess. I've tried my best to get it working,
18 * but I don't like programming floppies, and I have only one anyway.
19 * Urgel. I should check for more errors, and do more graceful error
20 * recovery. Seems there are problems with several drives. I've tried to
21 * correct them. No promises.
25 * As with hd.c, all routines within this file can (and will) be called
26 * by interrupts, so extreme caution is needed. A hardware interrupt
27 * handler may not sleep, or a kernel panic will happen. Thus I cannot
28 * call "floppy-on" directly, but have to set a special timer interrupt
33 * 28.02.92 - made track-buffering routines, based on the routines written
34 * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus.
38 * Automatic floppy-detection and formatting written by Werner Almesberger
39 * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with
40 * the floppy-change signal detection.
44 * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed
45 * FDC data overrun bug, added some preliminary stuff for vertical
48 * 1992/9/17: Added DMA allocation & DMA functions. -- hhb.
50 * TODO: Errors are still not counted properly.
54 * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl)
55 * modeled after the freeware MS-DOS program fdformat/88 V1.8 by
56 * Christoph H. Hochst\"atter.
57 * I have fixed the shift values to the ones I always use. Maybe a new
58 * ioctl() should be created to be able to modify them.
59 * There is a bug in the driver that makes it impossible to format a
60 * floppy as the first thing after bootup.
64 * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and
65 * this helped the floppy driver as well. Much cleaner, and still seems to
69 /* 1994/6/24 --bbroad-- added the floppy table entries and made
70 * minor modifications to allow 2.88 floppies to be run.
73 /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more
78 * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger
79 * format bug fixes, but unfortunately some new bugs too...
82 /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write
83 * errors to allow safe writing by specialized programs.
86 /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks
87 * by defining bit 1 of the "stretch" parameter to mean put sectors on the
88 * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's
89 * drives are "upside-down").
93 * 1995/8/26 -- Andreas Busse -- added Mips support.
97 * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent
98 * features to asm/floppy.h.
102 * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
106 * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of
107 * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting &
108 * use of '0' for NULL.
112 * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation
117 * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives.
121 * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24
122 * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were
123 * being used to store jiffies, which are unsigned longs).
127 * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br>
128 * - get rid of check_region
133 * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no
134 * floppy controller (lingering task on list after module is gone... boom.)
138 * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range
139 * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix
140 * requires many non-obvious changes in arch dependent code.
143 /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>.
144 * Better audit of register_blkdev.
147 #define FLOPPY_SANITY_CHECK
148 #undef FLOPPY_SILENT_DCL_CLEAR
150 #define REALLY_SLOW_IO
153 #define DCL_DEBUG /* debug disk change line */
155 /* do print messages for unexpected interrupts */
156 static int print_unex = 1;
157 #include <linux/module.h>
158 #include <linux/sched.h>
159 #include <linux/fs.h>
160 #include <linux/kernel.h>
161 #include <linux/timer.h>
162 #include <linux/workqueue.h>
164 #include <linux/fdreg.h>
165 #include <linux/fd.h>
166 #include <linux/hdreg.h>
167 #include <linux/errno.h>
168 #include <linux/slab.h>
169 #include <linux/mm.h>
170 #include <linux/bio.h>
171 #include <linux/string.h>
172 #include <linux/jiffies.h>
173 #include <linux/fcntl.h>
174 #include <linux/delay.h>
175 #include <linux/mc146818rtc.h> /* CMOS defines */
176 #include <linux/ioport.h>
177 #include <linux/interrupt.h>
178 #include <linux/init.h>
179 #include <linux/platform_device.h>
180 #include <linux/mod_devicetable.h>
181 #include <linux/buffer_head.h> /* for invalidate_buffers() */
182 #include <linux/mutex.h>
183 #include <linux/io.h>
184 #include <linux/uaccess.h>
187 * PS/2 floppies have much slower step rates than regular floppies.
188 * It's been recommended that take about 1/4 of the default speed
189 * in some more extreme cases.
191 static int slow_floppy;
195 #include <asm/system.h>
197 static int FLOPPY_IRQ = 6;
198 static int FLOPPY_DMA = 2;
199 static int can_use_virtual_dma = 2;
201 * can use virtual DMA:
202 * 0 = use of virtual DMA disallowed by config
203 * 1 = use of virtual DMA prescribed by config
204 * 2 = no virtual DMA preference configured. By default try hard DMA,
205 * but fall back on virtual DMA when not enough memory available
208 static int use_virtual_dma;
212 * 1 using virtual DMA
213 * This variable is set to virtual when a DMA mem problem arises, and
214 * reset back in floppy_grab_irq_and_dma.
215 * It is not safe to reset it in other circumstances, because the floppy
216 * driver may have several buffers in use at once, and we do currently not
217 * record each buffers capabilities
220 static DEFINE_SPINLOCK(floppy_lock);
222 static unsigned short virtual_dma_port = 0x3f0;
223 irqreturn_t floppy_interrupt(int irq, void *dev_id);
224 static int set_dor(int fdc, char mask, char data);
226 #define K_64 0x10000 /* 64KB */
228 /* the following is the mask of allowed drives. By default units 2 and
229 * 3 of both floppy controllers are disabled, because switching on the
230 * motor of these drives causes system hangs on some PCI computers. drive
231 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
232 * a drive is allowed.
234 * NOTE: This must come before we include the arch floppy header because
235 * some ports reference this variable from there. -DaveM
238 static int allowed_drive_mask = 0x33;
240 #include <asm/floppy.h>
242 static int irqdma_allocated;
244 #define DEVICE_NAME "floppy"
246 #include <linux/blkdev.h>
247 #include <linux/blkpg.h>
248 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
249 #include <linux/completion.h>
251 static struct request *current_req;
252 static struct request_queue *floppy_queue;
253 static void do_fd_request(struct request_queue *q);
255 #ifndef fd_get_dma_residue
256 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
259 /* Dma Memory related stuff */
261 #ifndef fd_dma_mem_free
262 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
265 #ifndef fd_dma_mem_alloc
266 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size))
269 static inline void fallback_on_nodma_alloc(char **addr, size_t l)
271 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
273 return; /* we have the memory */
274 if (can_use_virtual_dma != 2)
275 return; /* no fallback allowed */
276 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n");
277 *addr = (char *)nodma_mem_alloc(l);
283 /* End dma memory related stuff */
285 static unsigned long fake_change;
286 static int initialising = 1;
288 #define ITYPE(x) (((x) >> 2) & 0x1f)
289 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
290 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
291 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
292 /* reverse mapping from unit and fdc to drive */
293 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
295 #define DP (&drive_params[current_drive])
296 #define DRS (&drive_state[current_drive])
297 #define DRWE (&write_errors[current_drive])
298 #define FDCS (&fdc_state[fdc])
299 #define CLEARF(x) clear_bit(x##_BIT, &DRS->flags)
300 #define SETF(x) set_bit(x##_BIT, &DRS->flags)
301 #define TESTF(x) test_bit(x##_BIT, &DRS->flags)
303 #define UDP (&drive_params[drive])
304 #define UDRS (&drive_state[drive])
305 #define UDRWE (&write_errors[drive])
306 #define UFDCS (&fdc_state[FDC(drive)])
307 #define UCLEARF(x) clear_bit(x##_BIT, &UDRS->flags)
308 #define USETF(x) set_bit(x##_BIT, &UDRS->flags)
309 #define UTESTF(x) test_bit(x##_BIT, &UDRS->flags)
311 #define DPRINT(format, args...) \
312 pr_info(DEVICE_NAME "%d: " format, current_drive, ##args)
314 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
315 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
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).
340 * This default is used whenever the 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
432 * Bits 2 through 9 of 'stretch' tell the number of the first sector.
433 * The LSB (bit 2) is flipped. For most disks, the first sector
434 * is 1 (represented by 0x00<<2). For some CP/M and music sampler
435 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
436 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
438 * Other parameters should be self-explanatory (see also setfdprm(8)).
447 | | | | | | Data rate, | 0x40 for perp
448 | | | | | | | Spec1 (stepping rate, head unload
449 | | | | | | | | /fmt gap (gap2) */
450 static struct floppy_struct floppy_type[32] = {
451 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */
452 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
453 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
454 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
455 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
456 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
457 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
458 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
459 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
460 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
462 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
463 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
464 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
465 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
466 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
467 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
468 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
469 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
470 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
471 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
473 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
474 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
475 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
476 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
477 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
478 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
479 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
480 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
481 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
482 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
484 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
485 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
488 #define SECTSIZE (_FD_SECTSIZE(*floppy))
490 /* Auto-detection: Disk type used until the next media change occurs. */
491 static struct floppy_struct *current_type[N_DRIVE];
494 * User-provided type information. current_type points to
495 * the respective entry of this array.
497 static struct floppy_struct user_params[N_DRIVE];
499 static sector_t floppy_sizes[256];
501 static char floppy_device_name[] = "floppy";
504 * The driver is trying to determine the correct media format
505 * while probing is set. rw_interrupt() clears it after a
510 /* Synchronization of FDC access. */
511 #define FD_COMMAND_NONE -1
512 #define FD_COMMAND_ERROR 2
513 #define FD_COMMAND_OKAY 3
515 static volatile int command_status = FD_COMMAND_NONE;
516 static unsigned long fdc_busy;
517 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
518 static DECLARE_WAIT_QUEUE_HEAD(command_done);
520 #define NO_SIGNAL (!interruptible || !signal_pending(current))
521 #define CALL(x) if ((x) == -EINTR) return -EINTR
522 #define ECALL(x) if ((ret = (x))) return ret;
523 #define _WAIT(x,i) CALL(ret=wait_til_done((x),i))
524 #define WAIT(x) _WAIT((x),interruptible)
525 #define IWAIT(x) _WAIT((x),1)
527 /* Errors during formatting are counted here. */
528 static int format_errors;
530 /* Format request descriptor. */
531 static struct format_descr format_req;
534 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
535 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
536 * H is head unload time (1=16ms, 2=32ms, etc)
541 * Because these are written to by the DMA controller, they must
542 * not contain a 64k byte boundary crossing, or data will be
545 static char *floppy_track_buffer;
546 static int max_buffer_sectors;
549 typedef void (*done_f)(int);
550 static struct cont_t {
551 void (*interrupt)(void);
552 /* this is called after the interrupt of the
554 void (*redo)(void); /* this is called to retry the operation */
555 void (*error)(void); /* this is called to tally an error */
556 done_f done; /* this is called to say if the operation has
557 * succeeded/failed */
560 static void floppy_ready(void);
561 static void floppy_start(void);
562 static void process_fd_request(void);
563 static void recalibrate_floppy(void);
564 static void floppy_shutdown(unsigned long);
566 static int floppy_request_regions(int);
567 static void floppy_release_regions(int);
568 static int floppy_grab_irq_and_dma(void);
569 static void floppy_release_irq_and_dma(void);
572 * The "reset" variable should be tested whenever an interrupt is scheduled,
573 * after the commands have been sent. This is to ensure that the driver doesn't
574 * get wedged when the interrupt doesn't come because of a failed command.
575 * reset doesn't need to be tested before sending commands, because
576 * output_byte is automatically disabled when reset is set.
578 static void reset_fdc(void);
581 * These are global variables, as that's the easiest way to give
582 * information to interrupts. They are the data used for the current
586 #define NEED_1_RECAL -2
587 #define NEED_2_RECAL -3
589 static int usage_count;
591 /* buffer related variables */
592 static int buffer_track = -1;
593 static int buffer_drive = -1;
594 static int buffer_min = -1;
595 static int buffer_max = -1;
597 /* fdc related variables, should end up in a struct */
598 static struct floppy_fdc_state fdc_state[N_FDC];
599 static int fdc; /* current fdc */
601 static struct floppy_struct *_floppy = floppy_type;
602 static unsigned char current_drive;
603 static long current_count_sectors;
604 static unsigned char fsector_t; /* sector in track */
605 static unsigned char in_sector_offset; /* offset within physical sector,
606 * expressed in units of 512 bytes */
609 static inline int fd_eject(int drive)
620 static long unsigned debugtimer;
622 static inline void set_debugt(void)
624 debugtimer = jiffies;
627 static inline void debugt(const char *message)
629 if (DP->flags & DEBUGT)
630 pr_info("%s dtime=%lu\n", message, jiffies - debugtimer);
633 static inline void set_debugt(void) { }
634 static inline void debugt(const char *message) { }
637 typedef void (*timeout_fn) (unsigned long);
638 static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0);
640 static const char *timeout_message;
642 #ifdef FLOPPY_SANITY_CHECK
643 static void is_alive(const char *message)
645 /* this routine checks whether the floppy driver is "alive" */
646 if (test_bit(0, &fdc_busy) && command_status < 2
647 && !timer_pending(&fd_timeout)) {
648 DPRINT("timeout handler died: %s\n", message);
653 static void (*do_floppy)(void) = NULL;
655 #ifdef FLOPPY_SANITY_CHECK
659 static void (*lasthandler)(void);
660 static unsigned long interruptjiffies;
661 static unsigned long resultjiffies;
662 static int resultsize;
663 static unsigned long lastredo;
665 static struct output_log {
667 unsigned char status;
668 unsigned long jiffies;
669 } output_log[OLOGSIZE];
671 static int output_log_pos;
674 #define current_reqD -1
675 #define MAXTIMEOUT -2
677 static void __reschedule_timeout(int drive, const char *message, int marg)
679 if (drive == current_reqD)
680 drive = current_drive;
681 del_timer(&fd_timeout);
682 if (drive < 0 || drive >= N_DRIVE) {
683 fd_timeout.expires = jiffies + 20UL * HZ;
686 fd_timeout.expires = jiffies + UDP->timeout;
687 add_timer(&fd_timeout);
688 if (UDP->flags & FD_DEBUG)
689 DPRINT("reschedule timeout %s %d\n", message, marg);
690 timeout_message = message;
693 static void reschedule_timeout(int drive, const char *message, int marg)
697 spin_lock_irqsave(&floppy_lock, flags);
698 __reschedule_timeout(drive, message, marg);
699 spin_unlock_irqrestore(&floppy_lock, flags);
702 #define INFBOUND(a, b) (a) = max_t(int, a, b)
703 #define SUPBOUND(a, b) (a) = min_t(int, a, b)
706 * Bottom half floppy driver.
707 * ==========================
709 * This part of the file contains the code talking directly to the hardware,
710 * and also the main service loop (seek-configure-spinup-command)
715 * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
716 * and the last_checked date.
718 * last_checked is the date of the last check which showed 'no disk change'
719 * FD_DISK_CHANGE is set under two conditions:
720 * 1. The floppy has been changed after some i/o to that floppy already
722 * 2. No floppy disk is in the drive. This is done in order to ensure that
723 * requests are quickly flushed in case there is no disk in the drive. It
724 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
727 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
728 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
729 * each seek. If a disk is present, the disk change line should also be
730 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
731 * change line is set, this means either that no disk is in the drive, or
732 * that it has been removed since the last seek.
734 * This means that we really have a third possibility too:
735 * The floppy has been changed after the last seek.
738 static int disk_change(int drive)
740 int fdc = FDC(drive);
742 #ifdef FLOPPY_SANITY_CHECK
743 if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
744 DPRINT("WARNING disk change called early\n");
745 if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
746 (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
747 DPRINT("probing disk change on unselected drive\n");
748 DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive),
749 (unsigned int)FDCS->dor);
754 if (UDP->flags & FD_DEBUG) {
755 DPRINT("checking disk change line for drive %d\n", drive);
756 DPRINT("jiffies=%lu\n", jiffies);
757 DPRINT("disk change line=%x\n", fd_inb(FD_DIR) & 0x80);
758 DPRINT("flags=%lx\n", UDRS->flags);
761 if (UDP->flags & FD_BROKEN_DCL)
762 return UTESTF(FD_DISK_CHANGED);
763 if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) {
764 USETF(FD_VERIFY); /* verify write protection */
765 if (UDRS->maxblock) {
766 /* mark it changed */
767 USETF(FD_DISK_CHANGED);
770 /* invalidate its geometry */
771 if (UDRS->keep_data >= 0) {
772 if ((UDP->flags & FTD_MSG) &&
773 current_type[drive] != NULL)
774 DPRINT("Disk type is undefined after "
776 current_type[drive] = NULL;
777 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1;
782 UDRS->last_checked = jiffies;
783 UCLEARF(FD_DISK_NEWCHANGE);
788 static inline int is_selected(int dor, int unit)
790 return ((dor & (0x10 << unit)) && (dor & 3) == unit);
793 static int set_dor(int fdc, char mask, char data)
797 unsigned char newdor;
798 unsigned char olddor;
800 if (FDCS->address == -1)
804 newdor = (olddor & mask) | data;
805 if (newdor != olddor) {
807 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) {
808 drive = REVDRIVE(fdc, unit);
810 if (UDP->flags & FD_DEBUG)
811 DPRINT("calling disk change from set_dor\n");
816 fd_outb(newdor, FD_DOR);
819 if (!is_selected(olddor, unit) && is_selected(newdor, unit)) {
820 drive = REVDRIVE(fdc, unit);
821 UDRS->select_date = jiffies;
827 static void twaddle(void)
829 if (DP->select_delay)
831 fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR);
832 fd_outb(FDCS->dor, FD_DOR);
833 DRS->select_date = jiffies;
836 /* reset all driver information about the current fdc. This is needed after
837 * a reset, and after a raw command. */
838 static void reset_fdc_info(int mode)
842 FDCS->spec1 = FDCS->spec2 = -1;
843 FDCS->need_configure = 1;
846 for (drive = 0; drive < N_DRIVE; drive++)
847 if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL))
848 UDRS->track = NEED_2_RECAL;
851 /* selects the fdc and drive, and enables the fdc's input/dma. */
852 static void set_fdc(int drive)
854 if (drive >= 0 && drive < N_DRIVE) {
856 current_drive = drive;
858 if (fdc != 1 && fdc != 0) {
859 pr_info("bad fdc value\n");
864 set_dor(1 - fdc, ~8, 0);
866 if (FDCS->rawcmd == 2)
868 if (fd_inb(FD_STATUS) != STATUS_READY)
872 /* locks the driver */
873 static int _lock_fdc(int drive, int interruptible, int line)
876 pr_err("Trying to lock fdc while usage count=0 at line %d\n",
881 if (test_and_set_bit(0, &fdc_busy)) {
882 DECLARE_WAITQUEUE(wait, current);
883 add_wait_queue(&fdc_wait, &wait);
886 set_current_state(TASK_INTERRUPTIBLE);
888 if (!test_and_set_bit(0, &fdc_busy))
894 remove_wait_queue(&fdc_wait, &wait);
899 set_current_state(TASK_RUNNING);
900 remove_wait_queue(&fdc_wait, &wait);
901 flush_scheduled_work();
903 command_status = FD_COMMAND_NONE;
905 __reschedule_timeout(drive, "lock fdc", 0);
910 #define lock_fdc(drive, interruptible) \
911 _lock_fdc(drive, interruptible, __LINE__)
913 #define LOCK_FDC(drive, interruptible) \
914 if (lock_fdc(drive, interruptible)) \
917 /* unlocks the driver */
918 static inline void unlock_fdc(void)
923 if (!test_bit(0, &fdc_busy))
924 DPRINT("FDC access conflict!\n");
927 DPRINT("device interrupt still active at FDC release: %p!\n",
929 command_status = FD_COMMAND_NONE;
930 spin_lock_irqsave(&floppy_lock, flags);
931 del_timer(&fd_timeout);
933 clear_bit(0, &fdc_busy);
934 if (current_req || blk_peek_request(floppy_queue))
935 do_fd_request(floppy_queue);
936 spin_unlock_irqrestore(&floppy_lock, flags);
940 /* switches the motor off after a given timeout */
941 static void motor_off_callback(unsigned long nr)
943 unsigned char mask = ~(0x10 << UNIT(nr));
945 set_dor(FDC(nr), mask, 0);
948 /* schedules motor off */
949 static void floppy_off(unsigned int drive)
951 unsigned long volatile delta;
952 int fdc = FDC(drive);
954 if (!(FDCS->dor & (0x10 << UNIT(drive))))
957 del_timer(motor_off_timer + drive);
959 /* make spindle stop in a position which minimizes spinup time
962 delta = jiffies - UDRS->first_read_date + HZ -
963 UDP->spindown_offset;
964 delta = ((delta * UDP->rps) % HZ) / UDP->rps;
965 motor_off_timer[drive].expires =
966 jiffies + UDP->spindown - delta;
968 add_timer(motor_off_timer + drive);
972 * cycle through all N_DRIVE floppy drives, for disk change testing.
973 * stopping at current drive. This is done before any long operation, to
974 * be sure to have up to date disk change information.
976 static void scandrives(void)
982 if (DP->select_delay)
985 saved_drive = current_drive;
986 for (i = 0; i < N_DRIVE; i++) {
987 drive = (saved_drive + i + 1) % N_DRIVE;
988 if (UDRS->fd_ref == 0 || UDP->select_delay != 0)
989 continue; /* skip closed drives */
991 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &
992 (0x10 << UNIT(drive))))
993 /* switch the motor off again, if it was off to
995 set_dor(fdc, ~(0x10 << UNIT(drive)), 0);
997 set_fdc(saved_drive);
1000 static void empty(void)
1004 static DECLARE_WORK(floppy_work, NULL);
1006 static void schedule_bh(void (*handler)(void))
1008 PREPARE_WORK(&floppy_work, (work_func_t)handler);
1009 schedule_work(&floppy_work);
1012 static DEFINE_TIMER(fd_timer, NULL, 0, 0);
1014 static void cancel_activity(void)
1016 unsigned long flags;
1018 spin_lock_irqsave(&floppy_lock, flags);
1020 PREPARE_WORK(&floppy_work, (work_func_t)empty);
1021 del_timer(&fd_timer);
1022 spin_unlock_irqrestore(&floppy_lock, flags);
1025 /* this function makes sure that the disk stays in the drive during the
1027 static void fd_watchdog(void)
1030 if (DP->flags & FD_DEBUG)
1031 DPRINT("calling disk change from watchdog\n");
1034 if (disk_change(current_drive)) {
1035 DPRINT("disk removed during i/o\n");
1040 del_timer(&fd_timer);
1041 fd_timer.function = (timeout_fn) fd_watchdog;
1042 fd_timer.expires = jiffies + HZ / 10;
1043 add_timer(&fd_timer);
1047 static void main_command_interrupt(void)
1049 del_timer(&fd_timer);
1053 /* waits for a delay (spinup or select) to pass */
1054 static int fd_wait_for_completion(unsigned long delay, timeout_fn function)
1057 reset_fdc(); /* do the reset during sleep to win time
1058 * if we don't need to sleep, it's a good
1059 * occasion anyways */
1063 if (time_before(jiffies, delay)) {
1064 del_timer(&fd_timer);
1065 fd_timer.function = function;
1066 fd_timer.expires = delay;
1067 add_timer(&fd_timer);
1073 static DEFINE_SPINLOCK(floppy_hlt_lock);
1074 static int hlt_disabled;
1075 static void floppy_disable_hlt(void)
1077 unsigned long flags;
1079 spin_lock_irqsave(&floppy_hlt_lock, flags);
1080 if (!hlt_disabled) {
1082 #ifdef HAVE_DISABLE_HLT
1086 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1089 static void floppy_enable_hlt(void)
1091 unsigned long flags;
1093 spin_lock_irqsave(&floppy_hlt_lock, flags);
1096 #ifdef HAVE_DISABLE_HLT
1100 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1103 static void setup_DMA(void)
1107 #ifdef FLOPPY_SANITY_CHECK
1108 if (raw_cmd->length == 0) {
1111 pr_info("zero dma transfer size:");
1112 for (i = 0; i < raw_cmd->cmd_count; i++)
1113 pr_cont("%x,", raw_cmd->cmd[i]);
1119 if (((unsigned long)raw_cmd->kernel_data) % 512) {
1120 pr_info("non aligned address: %p\n", raw_cmd->kernel_data);
1126 f = claim_dma_lock();
1129 if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length,
1130 (raw_cmd->flags & FD_RAW_READ) ?
1131 DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) {
1132 release_dma_lock(f);
1137 release_dma_lock(f);
1140 fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length);
1141 fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ?
1142 DMA_MODE_READ : DMA_MODE_WRITE);
1143 fd_set_dma_addr(raw_cmd->kernel_data);
1144 fd_set_dma_count(raw_cmd->length);
1145 virtual_dma_port = FDCS->address;
1147 release_dma_lock(f);
1149 floppy_disable_hlt();
1152 static void show_floppy(void);
1154 /* waits until the fdc becomes ready */
1155 static int wait_til_ready(void)
1162 for (counter = 0; counter < 10000; counter++) {
1163 status = fd_inb(FD_STATUS);
1164 if (status & STATUS_READY)
1167 if (!initialising) {
1168 DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc);
1175 /* sends a command byte to the fdc */
1176 static int output_byte(char byte)
1178 int status = wait_til_ready();
1182 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY) {
1183 fd_outb(byte, FD_DATA);
1184 #ifdef FLOPPY_SANITY_CHECK
1185 output_log[output_log_pos].data = byte;
1186 output_log[output_log_pos].status = status;
1187 output_log[output_log_pos].jiffies = jiffies;
1188 output_log_pos = (output_log_pos + 1) % OLOGSIZE;
1193 if (!initialising) {
1194 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
1201 /* gets the response from the fdc */
1202 static int result(void)
1207 for (i = 0; i < MAX_REPLIES; i++) {
1208 status = wait_til_ready();
1211 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA;
1212 if ((status & ~STATUS_BUSY) == STATUS_READY) {
1213 #ifdef FLOPPY_SANITY_CHECK
1214 resultjiffies = jiffies;
1219 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY))
1220 reply_buffer[i] = fd_inb(FD_DATA);
1224 if (!initialising) {
1226 ("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
1234 #define MORE_OUTPUT -2
1235 /* does the fdc need more output? */
1236 static int need_more_output(void)
1238 int status = wait_til_ready();
1242 if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY)
1247 /* Set perpendicular mode as required, based on data rate, if supported.
1248 * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1250 static inline void perpendicular_mode(void)
1252 unsigned char perp_mode;
1254 if (raw_cmd->rate & 0x40) {
1255 switch (raw_cmd->rate & 3) {
1263 DPRINT("Invalid data rate for perpendicular mode!\n");
1267 * convenient way to return to
1268 * redo without too much hassle
1269 * (deep stack et al.)
1276 if (FDCS->perp_mode == perp_mode)
1278 if (FDCS->version >= FDC_82077_ORIG) {
1279 output_byte(FD_PERPENDICULAR);
1280 output_byte(perp_mode);
1281 FDCS->perp_mode = perp_mode;
1282 } else if (perp_mode) {
1283 DPRINT("perpendicular mode not supported by this FDC.\n");
1285 } /* perpendicular_mode */
1287 static int fifo_depth = 0xa;
1290 static int fdc_configure(void)
1293 output_byte(FD_CONFIGURE);
1294 if (need_more_output() != MORE_OUTPUT)
1297 output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf));
1298 output_byte(0); /* pre-compensation from track
1303 #define NOMINAL_DTR 500
1305 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1306 * head load time, and DMA disable flag to values needed by floppy.
1308 * The value "dtr" is the data transfer rate in Kbps. It is needed
1309 * to account for the data rate-based scaling done by the 82072 and 82077
1310 * FDC types. This parameter is ignored for other types of FDCs (i.e.
1313 * Note that changing the data transfer rate has a (probably deleterious)
1314 * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1315 * fdc_specify is called again after each data transfer rate
1318 * srt: 1000 to 16000 in microseconds
1319 * hut: 16 to 240 milliseconds
1320 * hlt: 2 to 254 milliseconds
1322 * These values are rounded up to the next highest available delay time.
1324 static void fdc_specify(void)
1326 unsigned char spec1;
1327 unsigned char spec2;
1331 unsigned long dtr = NOMINAL_DTR;
1332 unsigned long scale_dtr = NOMINAL_DTR;
1333 int hlt_max_code = 0x7f;
1334 int hut_max_code = 0xf;
1336 if (FDCS->need_configure && FDCS->version >= FDC_82072A) {
1338 FDCS->need_configure = 0;
1341 switch (raw_cmd->rate & 0x03) {
1347 if (FDCS->version >= FDC_82078) {
1348 /* chose the default rate table, not the one
1349 * where 1 = 2 Mbps */
1350 output_byte(FD_DRIVESPEC);
1351 if (need_more_output() == MORE_OUTPUT) {
1352 output_byte(UNIT(current_drive));
1362 if (FDCS->version >= FDC_82072) {
1364 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1365 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1368 /* Convert step rate from microseconds to milliseconds and 4 bits */
1369 srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR);
1376 hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR);
1379 else if (hlt > 0x7f)
1382 hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR);
1388 spec1 = (srt << 4) | hut;
1389 spec2 = (hlt << 1) | (use_virtual_dma & 1);
1391 /* If these parameters did not change, just return with success */
1392 if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) {
1393 /* Go ahead and set spec1 and spec2 */
1394 output_byte(FD_SPECIFY);
1395 output_byte(FDCS->spec1 = spec1);
1396 output_byte(FDCS->spec2 = spec2);
1400 /* Set the FDC's data transfer rate on behalf of the specified drive.
1401 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1402 * of the specify command (i.e. using the fdc_specify function).
1404 static int fdc_dtr(void)
1406 /* If data rate not already set to desired value, set it. */
1407 if ((raw_cmd->rate & 3) == FDCS->dtr)
1411 fd_outb(raw_cmd->rate & 3, FD_DCR);
1413 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1414 * need a stabilization period of several milliseconds to be
1415 * enforced after data rate changes before R/W operations.
1416 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1418 FDCS->dtr = raw_cmd->rate & 3;
1419 return fd_wait_for_completion(jiffies + 2UL * HZ / 100,
1420 (timeout_fn)floppy_ready);
1423 static void tell_sector(void)
1425 pr_cont(": track %d, head %d, sector %d, size %d",
1426 R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE);
1429 static void print_errors(void)
1432 if (ST0 & ST0_ECE) {
1433 pr_cont("Recalibrate failed!");
1434 } else if (ST2 & ST2_CRC) {
1435 pr_cont("data CRC error");
1437 } else if (ST1 & ST1_CRC) {
1438 pr_cont("CRC error");
1440 } else if ((ST1 & (ST1_MAM | ST1_ND)) ||
1443 pr_cont("sector not found");
1446 pr_cont("probe failed...");
1447 } else if (ST2 & ST2_WC) { /* seek error */
1448 pr_cont("wrong cylinder");
1449 } else if (ST2 & ST2_BC) { /* cylinder marked as bad */
1450 pr_cont("bad cylinder");
1452 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
1460 * OK, this error interpreting routine is called after a
1461 * DMA read/write has succeeded
1462 * or failed, so we check the results, and copy any buffers.
1463 * hhb: Added better error reporting.
1464 * ak: Made this into a separate routine.
1466 static int interpret_errors(void)
1471 DPRINT("-- FDC reply error");
1476 /* check IC to find cause of interrupt */
1477 switch (ST0 & ST0_INTR) {
1478 case 0x40: /* error occurred during command execution */
1480 return 0; /* occurs with pseudo-DMA */
1483 DPRINT("Drive is write protected\n");
1484 CLEARF(FD_DISK_WRITABLE);
1487 } else if (ST1 & ST1_ND) {
1488 SETF(FD_NEED_TWADDLE);
1489 } else if (ST1 & ST1_OR) {
1490 if (DP->flags & FTD_MSG)
1491 DPRINT("Over/Underrun - retrying\n");
1493 } else if (*errors >= DP->max_errors.reporting) {
1496 if (ST2 & ST2_WC || ST2 & ST2_BC)
1497 /* wrong cylinder => recal */
1498 DRS->track = NEED_2_RECAL;
1500 case 0x80: /* invalid command given */
1501 DPRINT("Invalid FDC command given!\n");
1505 DPRINT("Abnormal termination caused by polling\n");
1508 default: /* (0) Normal command termination */
1514 * This routine is called when everything should be correctly set up
1515 * for the transfer (i.e. floppy motor is on, the correct floppy is
1516 * selected, and the head is sitting on the right track).
1518 static void setup_rw_floppy(void)
1524 unsigned long ready_date;
1525 timeout_fn function;
1527 flags = raw_cmd->flags;
1528 if (flags & (FD_RAW_READ | FD_RAW_WRITE))
1529 flags |= FD_RAW_INTR;
1531 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) {
1532 ready_date = DRS->spinup_date + DP->spinup;
1533 /* If spinup will take a long time, rerun scandrives
1534 * again just before spinup completion. Beware that
1535 * after scandrives, we must again wait for selection.
1537 if (time_after(ready_date, jiffies + DP->select_delay)) {
1538 ready_date -= DP->select_delay;
1539 function = (timeout_fn) floppy_start;
1541 function = (timeout_fn) setup_rw_floppy;
1543 /* wait until the floppy is spinning fast enough */
1544 if (fd_wait_for_completion(ready_date, function))
1547 dflags = DRS->flags;
1549 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE))
1552 if (flags & FD_RAW_INTR)
1553 do_floppy = main_command_interrupt;
1556 for (i = 0; i < raw_cmd->cmd_count; i++)
1557 r |= output_byte(raw_cmd->cmd[i]);
1559 debugt("rw_command: ");
1567 if (!(flags & FD_RAW_INTR)) {
1570 } else if (flags & FD_RAW_NEED_DISK)
1574 static int blind_seek;
1577 * This is the routine called after every seek (or recalibrate) interrupt
1578 * from the floppy controller.
1580 static void seek_interrupt(void)
1582 debugt("seek interrupt:");
1583 if (inr != 2 || (ST0 & 0xF8) != 0x20) {
1584 DPRINT("seek failed\n");
1585 DRS->track = NEED_2_RECAL;
1590 if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) {
1592 if (DP->flags & FD_DEBUG) {
1593 DPRINT("clearing NEWCHANGE flag because of effective seek\n");
1594 DPRINT("jiffies=%lu\n", jiffies);
1597 CLEARF(FD_DISK_NEWCHANGE); /* effective seek */
1598 DRS->select_date = jiffies;
1604 static void check_wp(void)
1606 if (TESTF(FD_VERIFY)) {
1607 /* check write protection */
1608 output_byte(FD_GETSTATUS);
1609 output_byte(UNIT(current_drive));
1610 if (result() != 1) {
1615 CLEARF(FD_NEED_TWADDLE);
1617 if (DP->flags & FD_DEBUG) {
1618 DPRINT("checking whether disk is write protected\n");
1619 DPRINT("wp=%x\n", ST3 & 0x40);
1623 SETF(FD_DISK_WRITABLE);
1625 CLEARF(FD_DISK_WRITABLE);
1629 static void seek_floppy(void)
1636 if (DP->flags & FD_DEBUG)
1637 DPRINT("calling disk change from seek\n");
1640 if (!TESTF(FD_DISK_NEWCHANGE) &&
1641 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) {
1642 /* the media changed flag should be cleared after the seek.
1643 * If it isn't, this means that there is really no disk in
1646 SETF(FD_DISK_CHANGED);
1651 if (DRS->track <= NEED_1_RECAL) {
1652 recalibrate_floppy();
1654 } else if (TESTF(FD_DISK_NEWCHANGE) &&
1655 (raw_cmd->flags & FD_RAW_NEED_DISK) &&
1656 (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) {
1657 /* we seek to clear the media-changed condition. Does anybody
1658 * know a more elegant way, which works on all drives? */
1660 track = raw_cmd->track - 1;
1662 if (DP->flags & FD_SILENT_DCL_CLEAR) {
1663 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0);
1665 raw_cmd->flags |= FD_RAW_NEED_SEEK;
1671 if (raw_cmd->track != DRS->track &&
1672 (raw_cmd->flags & FD_RAW_NEED_SEEK))
1673 track = raw_cmd->track;
1680 do_floppy = seek_interrupt;
1681 output_byte(FD_SEEK);
1682 output_byte(UNIT(current_drive));
1683 if (output_byte(track) < 0) {
1687 debugt("seek command:");
1690 static void recal_interrupt(void)
1692 debugt("recal interrupt:");
1695 else if (ST0 & ST0_ECE) {
1696 switch (DRS->track) {
1698 debugt("recal interrupt need 1 recal:");
1699 /* after a second recalibrate, we still haven't
1700 * reached track 0. Probably no drive. Raise an
1701 * error, as failing immediately might upset
1702 * computers possessed by the Devil :-) */
1707 debugt("recal interrupt need 2 recal:");
1708 /* If we already did a recalibrate,
1709 * and we are not at track 0, this
1710 * means we have moved. (The only way
1711 * not to move at recalibration is to
1712 * be already at track 0.) Clear the
1713 * new change flag */
1715 if (DP->flags & FD_DEBUG)
1716 DPRINT("clearing NEWCHANGE flag because of second recalibrate\n");
1719 CLEARF(FD_DISK_NEWCHANGE);
1720 DRS->select_date = jiffies;
1723 debugt("recal interrupt default:");
1724 /* Recalibrate moves the head by at
1725 * most 80 steps. If after one
1726 * recalibrate we don't have reached
1727 * track 0, this might mean that we
1728 * started beyond track 80. Try
1730 DRS->track = NEED_1_RECAL;
1738 static void print_result(char *message, int inr)
1742 DPRINT("%s ", message);
1744 for (i = 0; i < inr; i++)
1745 pr_cont("repl[%d]=%x ", i, reply_buffer[i]);
1749 /* interrupt handler. Note that this can be called externally on the Sparc */
1750 irqreturn_t floppy_interrupt(int irq, void *dev_id)
1754 void (*handler)(void) = do_floppy;
1756 lasthandler = handler;
1757 interruptjiffies = jiffies;
1759 f = claim_dma_lock();
1761 release_dma_lock(f);
1763 floppy_enable_hlt();
1765 if (fdc >= N_FDC || FDCS->address == -1) {
1766 /* we don't even know which FDC is the culprit */
1767 pr_info("DOR0=%x\n", fdc_state[0].dor);
1768 pr_info("floppy interrupt on bizarre fdc %d\n", fdc);
1769 pr_info("handler=%p\n", handler);
1770 is_alive("bizarre fdc");
1775 /* We have to clear the reset flag here, because apparently on boxes
1776 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
1777 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
1778 * emission of the SENSEI's.
1779 * It is OK to emit floppy commands because we are in an interrupt
1780 * handler here, and thus we have to fear no interference of other
1784 do_print = !handler && print_unex && !initialising;
1788 print_result("unexpected interrupt", inr);
1792 output_byte(FD_SENSEI);
1795 print_result("sensei", inr);
1797 } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2
1804 schedule_bh(handler);
1805 is_alive("normal interrupt end");
1807 /* FIXME! Was it really for us? */
1811 static void recalibrate_floppy(void)
1813 debugt("recalibrate floppy:");
1814 do_floppy = recal_interrupt;
1815 output_byte(FD_RECALIBRATE);
1816 if (output_byte(UNIT(current_drive)) < 0) {
1823 * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1825 static void reset_interrupt(void)
1827 debugt("reset interrupt:");
1828 result(); /* get the status ready for set_fdc */
1830 pr_info("reset set in interrupt, calling %p\n", cont->error);
1831 cont->error(); /* a reset just after a reset. BAD! */
1837 * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1838 * or by setting the self clearing bit 7 of STATUS (newer FDCs)
1840 static void reset_fdc(void)
1842 unsigned long flags;
1844 do_floppy = reset_interrupt;
1848 /* Pseudo-DMA may intercept 'reset finished' interrupt. */
1849 /* Irrelevant for systems with true DMA (i386). */
1851 flags = claim_dma_lock();
1853 release_dma_lock(flags);
1855 if (FDCS->version >= FDC_82072A)
1856 fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS);
1858 fd_outb(FDCS->dor & ~0x04, FD_DOR);
1859 udelay(FD_RESET_DELAY);
1860 fd_outb(FDCS->dor, FD_DOR);
1864 static void show_floppy(void)
1869 pr_info("floppy driver state\n");
1870 pr_info("-------------------\n");
1871 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n",
1872 jiffies, interruptjiffies, jiffies - interruptjiffies,
1875 #ifdef FLOPPY_SANITY_CHECK
1876 pr_info("timeout_message=%s\n", timeout_message);
1877 pr_info("last output bytes:\n");
1878 for (i = 0; i < OLOGSIZE; i++)
1879 pr_info("%2x %2x %lu\n",
1880 output_log[(i + output_log_pos) % OLOGSIZE].data,
1881 output_log[(i + output_log_pos) % OLOGSIZE].status,
1882 output_log[(i + output_log_pos) % OLOGSIZE].jiffies);
1883 pr_info("last result at %lu\n", resultjiffies);
1884 pr_info("last redo_fd_request at %lu\n", lastredo);
1885 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1,
1886 reply_buffer, resultsize, true);
1889 pr_info("status=%x\n", fd_inb(FD_STATUS));
1890 pr_info("fdc_busy=%lu\n", fdc_busy);
1892 pr_info("do_floppy=%p\n", do_floppy);
1893 if (work_pending(&floppy_work))
1894 pr_info("floppy_work.func=%p\n", floppy_work.func);
1895 if (timer_pending(&fd_timer))
1896 pr_info("fd_timer.function=%p\n", fd_timer.function);
1897 if (timer_pending(&fd_timeout)) {
1898 pr_info("timer_function=%p\n", fd_timeout.function);
1899 pr_info("expires=%lu\n", fd_timeout.expires - jiffies);
1900 pr_info("now=%lu\n", jiffies);
1902 pr_info("cont=%p\n", cont);
1903 pr_info("current_req=%p\n", current_req);
1904 pr_info("command_status=%d\n", command_status);
1908 static void floppy_shutdown(unsigned long data)
1910 unsigned long flags;
1916 floppy_enable_hlt();
1918 flags = claim_dma_lock();
1920 release_dma_lock(flags);
1922 /* avoid dma going to a random drive after shutdown */
1925 DPRINT("floppy timeout called\n");
1929 cont->redo(); /* this will recall reset when needed */
1931 pr_info("no cont in shutdown!\n");
1932 process_fd_request();
1934 is_alive("floppy shutdown");
1937 /* start motor, check media-changed condition and write protection */
1938 static int start_motor(void (*function)(void))
1944 data = UNIT(current_drive);
1945 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) {
1946 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) {
1948 /* no read since this drive is running */
1949 DRS->first_read_date = 0;
1950 /* note motor start time if motor is not yet running */
1951 DRS->spinup_date = jiffies;
1952 data |= (0x10 << UNIT(current_drive));
1954 } else if (FDCS->dor & (0x10 << UNIT(current_drive)))
1955 mask &= ~(0x10 << UNIT(current_drive));
1957 /* starts motor and selects floppy */
1958 del_timer(motor_off_timer + current_drive);
1959 set_dor(fdc, mask, data);
1961 /* wait_for_completion also schedules reset if needed. */
1962 return fd_wait_for_completion(DRS->select_date + DP->select_delay,
1963 (timeout_fn)function);
1966 static void floppy_ready(void)
1972 if (start_motor(floppy_ready))
1978 if (DP->flags & FD_DEBUG)
1979 DPRINT("calling disk change from floppy_ready\n");
1981 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
1982 disk_change(current_drive) && !DP->select_delay)
1983 twaddle(); /* this clears the dcl on certain
1984 * drive/controller combinations */
1986 #ifdef fd_chose_dma_mode
1987 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) {
1988 unsigned long flags = claim_dma_lock();
1989 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length);
1990 release_dma_lock(flags);
1994 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) {
1995 perpendicular_mode();
1996 fdc_specify(); /* must be done here because of hut, hlt ... */
1999 if ((raw_cmd->flags & FD_RAW_READ) ||
2000 (raw_cmd->flags & FD_RAW_WRITE))
2006 static void floppy_start(void)
2008 reschedule_timeout(current_reqD, "floppy start", 0);
2012 if (DP->flags & FD_DEBUG)
2013 DPRINT("setting NEWCHANGE in floppy_start\n");
2015 SETF(FD_DISK_NEWCHANGE);
2020 * ========================================================================
2021 * here ends the bottom half. Exported routines are:
2022 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
2023 * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
2024 * Initialization also uses output_byte, result, set_dor, floppy_interrupt
2026 * ========================================================================
2029 * General purpose continuations.
2030 * ==============================
2033 static void do_wakeup(void)
2035 reschedule_timeout(MAXTIMEOUT, "do wakeup", 0);
2037 command_status += 2;
2038 wake_up(&command_done);
2041 static struct cont_t wakeup_cont = {
2045 .done = (done_f)empty
2048 static struct cont_t intr_cont = {
2050 .redo = process_fd_request,
2052 .done = (done_f)empty
2055 static int wait_til_done(void (*handler)(void), int interruptible)
2059 schedule_bh(handler);
2061 if (command_status < 2 && NO_SIGNAL) {
2062 DECLARE_WAITQUEUE(wait, current);
2064 add_wait_queue(&command_done, &wait);
2066 set_current_state(interruptible ?
2067 TASK_INTERRUPTIBLE :
2068 TASK_UNINTERRUPTIBLE);
2070 if (command_status >= 2 || !NO_SIGNAL)
2073 is_alive("wait_til_done");
2077 set_current_state(TASK_RUNNING);
2078 remove_wait_queue(&command_done, &wait);
2081 if (command_status < 2) {
2089 command_status = FD_COMMAND_ERROR;
2090 if (command_status == FD_COMMAND_OKAY)
2094 command_status = FD_COMMAND_NONE;
2098 static void generic_done(int result)
2100 command_status = result;
2101 cont = &wakeup_cont;
2104 static void generic_success(void)
2109 static void generic_failure(void)
2114 static void success_and_wakeup(void)
2121 * formatting and rw support.
2122 * ==========================
2125 static int next_valid_format(void)
2129 probed_format = DRS->probed_format;
2131 if (probed_format >= 8 || !DP->autodetect[probed_format]) {
2132 DRS->probed_format = 0;
2135 if (floppy_type[DP->autodetect[probed_format]].sect) {
2136 DRS->probed_format = probed_format;
2143 static void bad_flp_intr(void)
2148 DRS->probed_format++;
2149 if (!next_valid_format())
2152 err_count = ++(*errors);
2153 INFBOUND(DRWE->badness, err_count);
2154 if (err_count > DP->max_errors.abort)
2156 if (err_count > DP->max_errors.reset)
2158 else if (err_count > DP->max_errors.recal)
2159 DRS->track = NEED_2_RECAL;
2162 static void set_floppy(int drive)
2164 int type = ITYPE(UDRS->fd_device);
2167 _floppy = floppy_type + type;
2169 _floppy = current_type[drive];
2173 * formatting support.
2174 * ===================
2176 static void format_interrupt(void)
2178 switch (interpret_errors()) {
2189 #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2)
2190 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1))
2191 #define CT(x) ((x) | 0xc0)
2193 static void setup_format_params(int track)
2201 unsigned char track, head, sect, size;
2202 } *here = (struct fparm *)floppy_track_buffer;
2204 raw_cmd = &default_raw_cmd;
2205 raw_cmd->track = track;
2207 raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
2208 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK);
2209 raw_cmd->rate = _floppy->rate & 0x43;
2210 raw_cmd->cmd_count = NR_F;
2211 COMMAND = FM_MODE(_floppy, FD_FORMAT);
2212 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head);
2213 F_SIZECODE = FD_SIZECODE(_floppy);
2214 F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE;
2215 F_GAP = _floppy->fmt_gap;
2216 F_FILL = FD_FILL_BYTE;
2218 raw_cmd->kernel_data = floppy_track_buffer;
2219 raw_cmd->length = 4 * F_SECT_PER_TRACK;
2221 /* allow for about 30ms for data transport per track */
2222 head_shift = (F_SECT_PER_TRACK + 5) / 6;
2224 /* a ``cylinder'' is two tracks plus a little stepping time */
2225 track_shift = 2 * head_shift + 3;
2227 /* position of logical sector 1 on this track */
2228 n = (track_shift * format_req.track + head_shift * format_req.head)
2231 /* determine interleave */
2233 if (_floppy->fmt_gap < 0x22)
2236 /* initialize field */
2237 for (count = 0; count < F_SECT_PER_TRACK; ++count) {
2238 here[count].track = format_req.track;
2239 here[count].head = format_req.head;
2240 here[count].sect = 0;
2241 here[count].size = F_SIZECODE;
2243 /* place logical sectors */
2244 for (count = 1; count <= F_SECT_PER_TRACK; ++count) {
2245 here[n].sect = count;
2246 n = (n + il) % F_SECT_PER_TRACK;
2247 if (here[n].sect) { /* sector busy, find next free sector */
2249 if (n >= F_SECT_PER_TRACK) {
2250 n -= F_SECT_PER_TRACK;
2251 while (here[n].sect)
2256 if (_floppy->stretch & FD_SECTBASEMASK) {
2257 for (count = 0; count < F_SECT_PER_TRACK; count++)
2258 here[count].sect += FD_SECTBASE(_floppy) - 1;
2262 static void redo_format(void)
2265 setup_format_params(format_req.track << STRETCH(_floppy));
2267 debugt("queue format request");
2270 static struct cont_t format_cont = {
2271 .interrupt = format_interrupt,
2272 .redo = redo_format,
2273 .error = bad_flp_intr,
2274 .done = generic_done
2277 static int do_format(int drive, struct format_descr *tmp_format_req)
2284 _floppy->track > DP->tracks ||
2285 tmp_format_req->track >= _floppy->track ||
2286 tmp_format_req->head >= _floppy->head ||
2287 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
2288 !_floppy->fmt_gap) {
2289 process_fd_request();
2292 format_req = *tmp_format_req;
2294 cont = &format_cont;
2295 errors = &format_errors;
2297 process_fd_request();
2302 * Buffer read/write and support
2303 * =============================
2306 static void floppy_end_request(struct request *req, int error)
2308 unsigned int nr_sectors = current_count_sectors;
2309 unsigned int drive = (unsigned long)req->rq_disk->private_data;
2311 /* current_count_sectors can be zero if transfer failed */
2313 nr_sectors = blk_rq_cur_sectors(req);
2314 if (__blk_end_request(req, error, nr_sectors << 9))
2317 /* We're done with the request */
2322 /* new request_done. Can handle physical sectors which are smaller than a
2324 static void request_done(int uptodate)
2326 struct request_queue *q = floppy_queue;
2327 struct request *req = current_req;
2328 unsigned long flags;
2332 reschedule_timeout(MAXTIMEOUT, "request done", uptodate);
2335 pr_info("floppy.c: no request in request_done\n");
2340 /* maintain values for invalidation on geometry
2342 block = current_count_sectors + blk_rq_pos(req);
2343 INFBOUND(DRS->maxblock, block);
2344 if (block > _floppy->sect)
2347 /* unlock chained buffers */
2348 spin_lock_irqsave(q->queue_lock, flags);
2349 floppy_end_request(req, 0);
2350 spin_unlock_irqrestore(q->queue_lock, flags);
2352 if (rq_data_dir(req) == WRITE) {
2353 /* record write error information */
2354 DRWE->write_errors++;
2355 if (DRWE->write_errors == 1) {
2356 DRWE->first_error_sector = blk_rq_pos(req);
2357 DRWE->first_error_generation = DRS->generation;
2359 DRWE->last_error_sector = blk_rq_pos(req);
2360 DRWE->last_error_generation = DRS->generation;
2362 spin_lock_irqsave(q->queue_lock, flags);
2363 floppy_end_request(req, -EIO);
2364 spin_unlock_irqrestore(q->queue_lock, flags);
2368 /* Interrupt handler evaluating the result of the r/w operation */
2369 static void rw_interrupt(void)
2377 /* some Toshiba floppy controllers occasionnally seem to
2378 * return bogus interrupts after read/write operations, which
2379 * can be recognized by a bad head number (>= 2) */
2383 if (!DRS->first_read_date)
2384 DRS->first_read_date = jiffies;
2399 nr_sectors = (((R_TRACK - TRACK) * heads +
2400 R_HEAD - HEAD) * SECT_PER_TRACK +
2401 R_SECTOR - SECTOR + eoc) << SIZECODE >> 2;
2403 #ifdef FLOPPY_SANITY_CHECK
2404 if (nr_sectors / ssize >
2405 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) {
2406 DPRINT("long rw: %x instead of %lx\n",
2407 nr_sectors, current_count_sectors);
2408 pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR);
2409 pr_info("rh=%d h=%d\n", R_HEAD, HEAD);
2410 pr_info("rt=%d t=%d\n", R_TRACK, TRACK);
2411 pr_info("heads=%d eoc=%d\n", heads, eoc);
2412 pr_info("spt=%d st=%d ss=%d\n",
2413 SECT_PER_TRACK, fsector_t, ssize);
2414 pr_info("in_sector_offset=%d\n", in_sector_offset);
2418 nr_sectors -= in_sector_offset;
2419 INFBOUND(nr_sectors, 0);
2420 SUPBOUND(current_count_sectors, nr_sectors);
2422 switch (interpret_errors()) {
2427 if (!current_count_sectors) {
2434 if (!current_count_sectors) {
2438 current_type[current_drive] = _floppy;
2439 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2444 if (DP->flags & FTD_MSG)
2445 DPRINT("Auto-detected floppy type %s in fd%d\n",
2446 _floppy->name, current_drive);
2447 current_type[current_drive] = _floppy;
2448 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2452 if (CT(COMMAND) != FD_READ ||
2453 raw_cmd->kernel_data == current_req->buffer) {
2454 /* transfer directly from buffer */
2456 } else if (CT(COMMAND) == FD_READ) {
2457 buffer_track = raw_cmd->track;
2458 buffer_drive = current_drive;
2459 INFBOUND(buffer_max, nr_sectors + fsector_t);
2464 /* Compute maximal contiguous buffer size. */
2465 static int buffer_chain_size(void)
2469 struct req_iterator iter;
2472 base = bio_data(current_req->bio);
2475 rq_for_each_segment(bv, current_req, iter) {
2476 if (page_address(bv->bv_page) + bv->bv_offset != base + size)
2485 /* Compute the maximal transfer size */
2486 static int transfer_size(int ssize, int max_sector, int max_size)
2488 SUPBOUND(max_sector, fsector_t + max_size);
2491 max_sector -= (max_sector % _floppy->sect) % ssize;
2493 /* transfer size, beginning not aligned */
2494 current_count_sectors = max_sector - fsector_t;
2500 * Move data from/to the track buffer to/from the buffer cache.
2502 static void copy_buffer(int ssize, int max_sector, int max_sector_2)
2504 int remaining; /* number of transferred 512-byte sectors */
2509 struct req_iterator iter;
2511 max_sector = transfer_size(ssize,
2512 min(max_sector, max_sector_2),
2513 blk_rq_sectors(current_req));
2515 if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
2516 buffer_max > fsector_t + blk_rq_sectors(current_req))
2517 current_count_sectors = min_t(int, buffer_max - fsector_t,
2518 blk_rq_sectors(current_req));
2520 remaining = current_count_sectors << 9;
2521 #ifdef FLOPPY_SANITY_CHECK
2522 if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) {
2523 DPRINT("in copy buffer\n");
2524 pr_info("current_count_sectors=%ld\n", current_count_sectors);
2525 pr_info("remaining=%d\n", remaining >> 9);
2526 pr_info("current_req->nr_sectors=%u\n",
2527 blk_rq_sectors(current_req));
2528 pr_info("current_req->current_nr_sectors=%u\n",
2529 blk_rq_cur_sectors(current_req));
2530 pr_info("max_sector=%d\n", max_sector);
2531 pr_info("ssize=%d\n", ssize);
2535 buffer_max = max(max_sector, buffer_max);
2537 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
2539 size = blk_rq_cur_bytes(current_req);
2541 rq_for_each_segment(bv, current_req, iter) {
2546 SUPBOUND(size, remaining);
2548 buffer = page_address(bv->bv_page) + bv->bv_offset;
2549 #ifdef FLOPPY_SANITY_CHECK
2550 if (dma_buffer + size >
2551 floppy_track_buffer + (max_buffer_sectors << 10) ||
2552 dma_buffer < floppy_track_buffer) {
2553 DPRINT("buffer overrun in copy buffer %d\n",
2554 (int)((floppy_track_buffer - dma_buffer) >> 9));
2555 pr_info("fsector_t=%d buffer_min=%d\n",
2556 fsector_t, buffer_min);
2557 pr_info("current_count_sectors=%ld\n",
2558 current_count_sectors);
2559 if (CT(COMMAND) == FD_READ)
2561 if (CT(COMMAND) == FD_WRITE)
2565 if (((unsigned long)buffer) % 512)
2566 DPRINT("%p buffer not aligned\n", buffer);
2568 if (CT(COMMAND) == FD_READ)
2569 memcpy(buffer, dma_buffer, size);
2571 memcpy(dma_buffer, buffer, size);
2576 #ifdef FLOPPY_SANITY_CHECK
2579 max_sector -= remaining >> 9;
2580 DPRINT("weirdness: remaining %d\n", remaining >> 9);
2585 /* work around a bug in pseudo DMA
2586 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2587 * sending data. Hence we need a different way to signal the
2588 * transfer length: We use SECT_PER_TRACK. Unfortunately, this
2589 * does not work with MT, hence we can only transfer one head at
2592 static void virtualdmabug_workaround(void)
2597 if (CT(COMMAND) == FD_WRITE) {
2598 COMMAND &= ~0x80; /* switch off multiple track mode */
2600 hard_sectors = raw_cmd->length >> (7 + SIZECODE);
2601 end_sector = SECTOR + hard_sectors - 1;
2602 #ifdef FLOPPY_SANITY_CHECK
2603 if (end_sector > SECT_PER_TRACK) {
2604 pr_info("too many sectors %d > %d\n",
2605 end_sector, SECT_PER_TRACK);
2609 SECT_PER_TRACK = end_sector;
2610 /* make sure SECT_PER_TRACK
2611 * points to end of transfer */
2616 * Formulate a read/write request.
2617 * this routine decides where to load the data (directly to buffer, or to
2618 * tmp floppy area), how much data to load (the size of the buffer, the whole
2619 * track, or a single sector)
2620 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2621 * allocation on the fly, it should be done here. No other part should need
2625 static int make_raw_rw_request(void)
2627 int aligned_sector_t;
2633 if (max_buffer_sectors == 0) {
2634 pr_info("VFS: Block I/O scheduled on unopened device\n");
2638 set_fdc((long)current_req->rq_disk->private_data);
2640 raw_cmd = &default_raw_cmd;
2641 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK |
2643 raw_cmd->cmd_count = NR_RW;
2644 if (rq_data_dir(current_req) == READ) {
2645 raw_cmd->flags |= FD_RAW_READ;
2646 COMMAND = FM_MODE(_floppy, FD_READ);
2647 } else if (rq_data_dir(current_req) == WRITE) {
2648 raw_cmd->flags |= FD_RAW_WRITE;
2649 COMMAND = FM_MODE(_floppy, FD_WRITE);
2651 DPRINT("make_raw_rw_request: unknown command\n");
2655 max_sector = _floppy->sect * _floppy->head;
2657 TRACK = (int)blk_rq_pos(current_req) / max_sector;
2658 fsector_t = (int)blk_rq_pos(current_req) % max_sector;
2659 if (_floppy->track && TRACK >= _floppy->track) {
2660 if (blk_rq_cur_sectors(current_req) & 1) {
2661 current_count_sectors = 1;
2666 HEAD = fsector_t / _floppy->sect;
2668 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) ||
2669 TESTF(FD_NEED_TWADDLE)) && fsector_t < _floppy->sect)
2670 max_sector = _floppy->sect;
2672 /* 2M disks have phantom sectors on the first track */
2673 if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) {
2674 max_sector = 2 * _floppy->sect / 3;
2675 if (fsector_t >= max_sector) {
2676 current_count_sectors =
2677 min_t(int, _floppy->sect - fsector_t,
2678 blk_rq_sectors(current_req));
2683 SIZECODE = FD_SIZECODE(_floppy);
2684 raw_cmd->rate = _floppy->rate & 0x43;
2685 if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2)
2692 raw_cmd->track = TRACK << STRETCH(_floppy);
2693 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD);
2696 SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
2697 SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) +
2698 FD_SECTBASE(_floppy);
2700 /* tracksize describes the size which can be filled up with sectors
2703 tracksize = _floppy->sect - _floppy->sect % ssize;
2704 if (tracksize < _floppy->sect) {
2706 if (tracksize <= fsector_t % _floppy->sect)
2709 /* if we are beyond tracksize, fill up using smaller sectors */
2710 while (tracksize <= fsector_t % _floppy->sect) {
2711 while (tracksize + ssize > _floppy->sect) {
2719 max_sector = HEAD * _floppy->sect + tracksize;
2720 } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) {
2721 max_sector = _floppy->sect;
2722 } else if (!HEAD && CT(COMMAND) == FD_WRITE) {
2723 /* for virtual DMA bug workaround */
2724 max_sector = _floppy->sect;
2727 in_sector_offset = (fsector_t % _floppy->sect) % ssize;
2728 aligned_sector_t = fsector_t - in_sector_offset;
2729 max_size = blk_rq_sectors(current_req);
2730 if ((raw_cmd->track == buffer_track) &&
2731 (current_drive == buffer_drive) &&
2732 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
2733 /* data already in track buffer */
2734 if (CT(COMMAND) == FD_READ) {
2735 copy_buffer(1, max_sector, buffer_max);
2738 } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) {
2739 if (CT(COMMAND) == FD_WRITE) {
2740 unsigned int sectors;
2742 sectors = fsector_t + blk_rq_sectors(current_req);
2743 if (sectors > ssize && sectors < ssize + ssize)
2744 max_size = ssize + ssize;
2748 raw_cmd->flags &= ~FD_RAW_WRITE;
2749 raw_cmd->flags |= FD_RAW_READ;
2750 COMMAND = FM_MODE(_floppy, FD_READ);
2751 } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) {
2752 unsigned long dma_limit;
2753 int direct, indirect;
2756 transfer_size(ssize, max_sector,
2757 max_buffer_sectors * 2) - fsector_t;
2760 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2761 * on a 64 bit machine!
2763 max_size = buffer_chain_size();
2764 dma_limit = (MAX_DMA_ADDRESS -
2765 ((unsigned long)current_req->buffer)) >> 9;
2766 if ((unsigned long)max_size > dma_limit)
2767 max_size = dma_limit;
2768 /* 64 kb boundaries */
2769 if (CROSS_64KB(current_req->buffer, max_size << 9))
2771 ((unsigned long)current_req->buffer) %
2773 direct = transfer_size(ssize, max_sector, max_size) - fsector_t;
2775 * We try to read tracks, but if we get too many errors, we
2776 * go back to reading just one sector at a time.
2778 * This means we should be able to read a sector even if there
2779 * are other bad sectors on this track.
2782 (indirect * 2 > direct * 3 &&
2783 *errors < DP->max_errors.read_track &&
2785 (DP->read_track & (1 << DRS->probed_format)))))) {
2786 max_size = blk_rq_sectors(current_req);
2788 raw_cmd->kernel_data = current_req->buffer;
2789 raw_cmd->length = current_count_sectors << 9;
2790 if (raw_cmd->length == 0) {
2791 DPRINT("zero dma transfer attempted from make_raw_request\n");
2792 DPRINT("indirect=%d direct=%d fsector_t=%d\n",
2793 indirect, direct, fsector_t);
2796 virtualdmabug_workaround();
2801 if (CT(COMMAND) == FD_READ)
2802 max_size = max_sector; /* unbounded */
2804 /* claim buffer track if needed */
2805 if (buffer_track != raw_cmd->track || /* bad track */
2806 buffer_drive != current_drive || /* bad drive */
2807 fsector_t > buffer_max ||
2808 fsector_t < buffer_min ||
2809 ((CT(COMMAND) == FD_READ ||
2810 (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) &&
2811 max_sector > 2 * max_buffer_sectors + buffer_min &&
2812 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) {
2813 /* not enough space */
2815 buffer_drive = current_drive;
2816 buffer_max = buffer_min = aligned_sector_t;
2818 raw_cmd->kernel_data = floppy_track_buffer +
2819 ((aligned_sector_t - buffer_min) << 9);
2821 if (CT(COMMAND) == FD_WRITE) {
2822 /* copy write buffer to track buffer.
2823 * if we get here, we know that the write
2824 * is either aligned or the data already in the buffer
2825 * (buffer will be overwritten) */
2826 #ifdef FLOPPY_SANITY_CHECK
2827 if (in_sector_offset && buffer_track == -1)
2828 DPRINT("internal error offset !=0 on write\n");
2830 buffer_track = raw_cmd->track;
2831 buffer_drive = current_drive;
2832 copy_buffer(ssize, max_sector,
2833 2 * max_buffer_sectors + buffer_min);
2835 transfer_size(ssize, max_sector,
2836 2 * max_buffer_sectors + buffer_min -
2839 /* round up current_count_sectors to get dma xfer size */
2840 raw_cmd->length = in_sector_offset + current_count_sectors;
2841 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1;
2842 raw_cmd->length <<= 9;
2843 #ifdef FLOPPY_SANITY_CHECK
2844 if ((raw_cmd->length < current_count_sectors << 9) ||
2845 (raw_cmd->kernel_data != current_req->buffer &&
2846 CT(COMMAND) == FD_WRITE &&
2847 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
2848 aligned_sector_t < buffer_min)) ||
2849 raw_cmd->length % (128 << SIZECODE) ||
2850 raw_cmd->length <= 0 || current_count_sectors <= 0) {
2851 DPRINT("fractionary current count b=%lx s=%lx\n",
2852 raw_cmd->length, current_count_sectors);
2853 if (raw_cmd->kernel_data != current_req->buffer)
2854 pr_info("addr=%d, length=%ld\n",
2855 (int)((raw_cmd->kernel_data -
2856 floppy_track_buffer) >> 9),
2857 current_count_sectors);
2858 pr_info("st=%d ast=%d mse=%d msi=%d\n",
2859 fsector_t, aligned_sector_t, max_sector, max_size);
2860 pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE);
2861 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2862 COMMAND, SECTOR, HEAD, TRACK);
2863 pr_info("buffer drive=%d\n", buffer_drive);
2864 pr_info("buffer track=%d\n", buffer_track);
2865 pr_info("buffer_min=%d\n", buffer_min);
2866 pr_info("buffer_max=%d\n", buffer_max);
2870 if (raw_cmd->kernel_data != current_req->buffer) {
2871 if (raw_cmd->kernel_data < floppy_track_buffer ||
2872 current_count_sectors < 0 ||
2873 raw_cmd->length < 0 ||
2874 raw_cmd->kernel_data + raw_cmd->length >
2875 floppy_track_buffer + (max_buffer_sectors << 10)) {
2876 DPRINT("buffer overrun in schedule dma\n");
2877 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n",
2878 fsector_t, buffer_min, raw_cmd->length >> 9);
2879 pr_info("current_count_sectors=%ld\n",
2880 current_count_sectors);
2881 if (CT(COMMAND) == FD_READ)
2883 if (CT(COMMAND) == FD_WRITE)
2887 } else if (raw_cmd->length > blk_rq_bytes(current_req) ||
2888 current_count_sectors > blk_rq_sectors(current_req)) {
2889 DPRINT("buffer overrun in direct transfer\n");
2891 } else if (raw_cmd->length < current_count_sectors << 9) {
2892 DPRINT("more sectors than bytes\n");
2893 pr_info("bytes=%ld\n", raw_cmd->length >> 9);
2894 pr_info("sectors=%ld\n", current_count_sectors);
2896 if (raw_cmd->length == 0) {
2897 DPRINT("zero dma transfer attempted from make_raw_request\n");
2902 virtualdmabug_workaround();
2906 static void redo_fd_request(void)
2908 #define REPEAT {request_done(0); continue; }
2913 if (current_drive < N_DRIVE)
2914 floppy_off(current_drive);
2918 struct request *req;
2920 spin_lock_irq(floppy_queue->queue_lock);
2921 req = blk_fetch_request(floppy_queue);
2922 spin_unlock_irq(floppy_queue->queue_lock);
2930 drive = (long)current_req->rq_disk->private_data;
2932 reschedule_timeout(current_reqD, "redo fd request", 0);
2935 raw_cmd = &default_raw_cmd;
2937 if (start_motor(redo_fd_request))
2939 disk_change(current_drive);
2940 if (test_bit(current_drive, &fake_change) ||
2941 TESTF(FD_DISK_CHANGED)) {
2942 DPRINT("disk absent or changed during operation\n");
2945 if (!_floppy) { /* Autodetection */
2947 DRS->probed_format = 0;
2948 if (next_valid_format()) {
2949 DPRINT("no autodetectable formats\n");
2956 floppy_type + DP->autodetect[DRS->probed_format];
2959 errors = &(current_req->errors);
2960 tmp = make_raw_rw_request();
2966 if (TESTF(FD_NEED_TWADDLE))
2968 schedule_bh(floppy_start);
2969 debugt("queue fd request");
2975 static struct cont_t rw_cont = {
2976 .interrupt = rw_interrupt,
2977 .redo = redo_fd_request,
2978 .error = bad_flp_intr,
2979 .done = request_done
2982 static void process_fd_request(void)
2985 schedule_bh(redo_fd_request);
2988 static void do_fd_request(struct request_queue *q)
2990 if (max_buffer_sectors == 0) {
2991 pr_info("VFS: do_fd_request called on non-open device\n");
2995 if (usage_count == 0) {
2996 pr_info("warning: usage count=0, current_req=%p exiting\n",
2998 pr_info("sect=%ld type=%x flags=%x\n",
2999 (long)blk_rq_pos(current_req), current_req->cmd_type,
3000 current_req->cmd_flags);
3003 if (test_bit(0, &fdc_busy)) {
3004 /* fdc busy, this new request will be treated when the
3005 current one is done */
3006 is_alive("do fd request, old request running");
3009 lock_fdc(MAXTIMEOUT, 0);
3010 process_fd_request();
3011 is_alive("do fd request");
3014 static struct cont_t poll_cont = {
3015 .interrupt = success_and_wakeup,
3016 .redo = floppy_ready,
3017 .error = generic_failure,
3018 .done = generic_done
3021 static int poll_drive(int interruptible, int flag)
3025 /* no auto-sense, just clear dcl */
3026 raw_cmd = &default_raw_cmd;
3027 raw_cmd->flags = flag;
3029 raw_cmd->cmd_count = 0;
3032 if (DP->flags & FD_DEBUG)
3033 DPRINT("setting NEWCHANGE in poll_drive\n");
3035 SETF(FD_DISK_NEWCHANGE);
3041 * User triggered reset
3042 * ====================
3045 static void reset_intr(void)
3047 pr_info("weird, reset interrupt called\n");
3050 static struct cont_t reset_cont = {
3051 .interrupt = reset_intr,
3052 .redo = success_and_wakeup,
3053 .error = generic_failure,
3054 .done = generic_done
3057 static int user_reset_fdc(int drive, int arg, int interruptible)
3062 LOCK_FDC(drive, interruptible);
3063 if (arg == FD_RESET_ALWAYS)
3069 process_fd_request();
3074 * Misc Ioctl's and support
3075 * ========================
3077 static inline int fd_copyout(void __user *param, const void *address,
3080 return copy_to_user(param, address, size) ? -EFAULT : 0;
3083 static inline int fd_copyin(void __user *param, void *address,
3086 return copy_from_user(address, param, size) ? -EFAULT : 0;
3089 #define _COPYOUT(x) (copy_to_user((void __user *)param, &(x), sizeof(x)) \
3091 #define _COPYIN(x) (copy_from_user(&(x), (void __user *)param, sizeof(x)) \
3094 #define COPYOUT(x) ECALL(_COPYOUT(x))
3095 #define COPYIN(x) ECALL(_COPYIN(x))
3097 static inline const char *drive_name(int type, int drive)
3099 struct floppy_struct *floppy;
3102 floppy = floppy_type + type;
3104 if (UDP->native_format)
3105 floppy = floppy_type + UDP->native_format;
3110 return floppy->name;
3116 static void raw_cmd_done(int flag)
3121 raw_cmd->flags |= FD_RAW_FAILURE;
3122 raw_cmd->flags |= FD_RAW_HARDFAILURE;
3124 raw_cmd->reply_count = inr;
3125 if (raw_cmd->reply_count > MAX_REPLIES)
3126 raw_cmd->reply_count = 0;
3127 for (i = 0; i < raw_cmd->reply_count; i++)
3128 raw_cmd->reply[i] = reply_buffer[i];
3130 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3131 unsigned long flags;
3132 flags = claim_dma_lock();
3133 raw_cmd->length = fd_get_dma_residue();
3134 release_dma_lock(flags);
3137 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
3138 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
3139 raw_cmd->flags |= FD_RAW_FAILURE;
3141 if (disk_change(current_drive))
3142 raw_cmd->flags |= FD_RAW_DISK_CHANGE;
3144 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
3145 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
3146 motor_off_callback(current_drive);
3148 if (raw_cmd->next &&
3149 (!(raw_cmd->flags & FD_RAW_FAILURE) ||
3150 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
3151 ((raw_cmd->flags & FD_RAW_FAILURE) ||
3152 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) {
3153 raw_cmd = raw_cmd->next;
3160 static struct cont_t raw_cmd_cont = {
3161 .interrupt = success_and_wakeup,
3162 .redo = floppy_start,
3163 .error = generic_failure,
3164 .done = raw_cmd_done
3167 static inline int raw_cmd_copyout(int cmd, char __user *param,
3168 struct floppy_raw_cmd *ptr)
3174 param += sizeof(struct floppy_raw_cmd);
3175 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) {
3176 if (ptr->length >= 0 &&
3177 ptr->length <= ptr->buffer_length) {
3178 long length = ptr->buffer_length - ptr->length;
3179 ECALL(fd_copyout(ptr->data, ptr->kernel_data,
3188 static void raw_cmd_free(struct floppy_raw_cmd **ptr)
3190 struct floppy_raw_cmd *next;
3191 struct floppy_raw_cmd *this;
3196 if (this->buffer_length) {
3197 fd_dma_mem_free((unsigned long)this->kernel_data,
3198 this->buffer_length);
3199 this->buffer_length = 0;
3207 static inline int raw_cmd_copyin(int cmd, char __user *param,
3208 struct floppy_raw_cmd **rcmd)
3210 struct floppy_raw_cmd *ptr;
3216 ptr = (struct floppy_raw_cmd *)
3217 kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
3223 ptr->buffer_length = 0;
3224 param += sizeof(struct floppy_raw_cmd);
3225 if (ptr->cmd_count > 33)
3226 /* the command may now also take up the space
3227 * initially intended for the reply & the
3228 * reply count. Needed for long 82078 commands
3229 * such as RESTORE, which takes ... 17 command
3230 * bytes. Murphy's law #137: When you reserve
3231 * 16 bytes for a structure, you'll one day
3232 * discover that you really need 17...
3236 for (i = 0; i < 16; i++)
3238 ptr->resultcode = 0;
3239 ptr->kernel_data = NULL;
3241 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3242 if (ptr->length <= 0)
3245 (char *)fd_dma_mem_alloc(ptr->length);
3246 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
3247 if (!ptr->kernel_data)
3249 ptr->buffer_length = ptr->length;
3251 if (ptr->flags & FD_RAW_WRITE)
3252 ECALL(fd_copyin(ptr->data, ptr->kernel_data,
3254 rcmd = &(ptr->next);
3255 if (!(ptr->flags & FD_RAW_MORE))
3261 static int raw_cmd_ioctl(int cmd, void __user *param)
3263 struct floppy_raw_cmd *my_raw_cmd;
3268 if (FDCS->rawcmd <= 1)
3270 for (drive = 0; drive < N_DRIVE; drive++) {
3271 if (FDC(drive) != fdc)
3273 if (drive == current_drive) {
3274 if (UDRS->fd_ref > 1) {
3278 } else if (UDRS->fd_ref) {
3287 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
3289 raw_cmd_free(&my_raw_cmd);
3293 raw_cmd = my_raw_cmd;
3294 cont = &raw_cmd_cont;
3295 ret = wait_til_done(floppy_start, 1);
3297 if (DP->flags & FD_DEBUG)
3298 DPRINT("calling disk change from raw_cmd ioctl\n");
3301 if (ret != -EINTR && FDCS->reset)
3304 DRS->track = NO_TRACK;
3306 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
3309 raw_cmd_free(&my_raw_cmd);
3313 static int invalidate_drive(struct block_device *bdev)
3315 /* invalidate the buffer track to force a reread */
3316 set_bit((long)bdev->bd_disk->private_data, &fake_change);
3317 process_fd_request();
3318 check_disk_change(bdev);
3322 static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
3323 int drive, int type, struct block_device *bdev)
3327 /* sanity checking for parameters. */
3330 g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) ||
3331 /* check if reserved bits are set */
3332 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0)
3335 if (!capable(CAP_SYS_ADMIN))
3337 mutex_lock(&open_lock);
3338 if (lock_fdc(drive, 1)) {
3339 mutex_unlock(&open_lock);
3342 floppy_type[type] = *g;
3343 floppy_type[type].name = "user format";
3344 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
3345 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] =
3346 floppy_type[type].size + 1;
3347 process_fd_request();
3348 for (cnt = 0; cnt < N_DRIVE; cnt++) {
3349 struct block_device *bdev = opened_bdev[cnt];
3350 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
3352 __invalidate_device(bdev);
3354 mutex_unlock(&open_lock);
3358 if (cmd != FDDEFPRM)
3359 /* notice a disk change immediately, else
3360 * we lose our settings immediately*/
3361 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3362 oldStretch = g->stretch;
3363 user_params[drive] = *g;
3364 if (buffer_drive == drive)
3365 SUPBOUND(buffer_max, user_params[drive].sect);
3366 current_type[drive] = &user_params[drive];
3367 floppy_sizes[drive] = user_params[drive].size;
3368 if (cmd == FDDEFPRM)
3369 DRS->keep_data = -1;
3372 /* invalidation. Invalidate only when needed, i.e.
3373 * when there are already sectors in the buffer cache
3374 * whose number will change. This is useful, because
3375 * mtools often changes the geometry of the disk after
3376 * looking at the boot block */
3377 if (DRS->maxblock > user_params[drive].sect ||
3379 ((user_params[drive].sect ^ oldStretch) &
3380 (FD_SWAPSIDES | FD_SECTBASEMASK)))
3381 invalidate_drive(bdev);
3383 process_fd_request();
3388 /* handle obsolete ioctl's */
3389 static int ioctl_table[] = {
3417 static inline int normalize_ioctl(int *cmd, int *size)
3421 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) {
3422 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) {
3423 *size = _IOC_SIZE(*cmd);
3424 *cmd = ioctl_table[i];
3425 if (*size > _IOC_SIZE(*cmd)) {
3426 pr_info("ioctl not yet supported\n");
3435 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
3438 *g = &floppy_type[type];
3441 CALL(poll_drive(0, 0));
3442 process_fd_request();
3443 *g = current_type[drive];
3450 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
3452 int drive = (long)bdev->bd_disk->private_data;
3453 int type = ITYPE(drive_state[drive].fd_device);
3454 struct floppy_struct *g;
3457 ret = get_floppy_geometry(drive, type, &g);
3461 geo->heads = g->head;
3462 geo->sectors = g->sect;
3463 geo->cylinders = g->track;
3467 static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3468 unsigned long param)
3470 #define FD_IOCTL_ALLOWED (mode & (FMODE_WRITE|FMODE_WRITE_IOCTL))
3471 #define OUT(c,x) case c: outparam = (const char *) (x); break
3472 #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0
3474 int drive = (long)bdev->bd_disk->private_data;
3475 int type = ITYPE(UDRS->fd_device);
3480 struct floppy_struct g; /* geometry */
3481 struct format_descr f;
3482 struct floppy_max_errors max_errors;
3483 struct floppy_drive_params dp;
3484 } inparam; /* parameters coming from user space */
3485 const char *outparam; /* parameters passed back to user space */
3487 /* convert compatibility eject ioctls into floppy eject ioctl.
3488 * We do this in order to provide a means to eject floppy disks before
3489 * installing the new fdutils package */
3490 if (cmd == CDROMEJECT || /* CD-ROM eject */
3491 cmd == 0x6470) { /* SunOS floppy eject */
3492 DPRINT("obsolete eject ioctl\n");
3493 DPRINT("please use floppycontrol --eject\n");
3497 if (!((cmd & 0xff00) == 0x0200))
3500 /* convert the old style command into a new style command */
3501 ECALL(normalize_ioctl(&cmd, &size));
3503 /* permission checks */
3504 if (((cmd & 0x40) && !FD_IOCTL_ALLOWED) ||
3505 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
3508 if (WARN_ON(size < 0 || size > sizeof(inparam)))
3512 CLEARSTRUCT(&inparam);
3513 if (_IOC_DIR(cmd) & _IOC_WRITE)
3514 ECALL(fd_copyin((void __user *)param, &inparam, size))
3518 if (UDRS->fd_ref != 1)
3519 /* somebody else has this drive open */
3523 /* do the actual eject. Fails on
3524 * non-Sparc architectures */
3525 ret = fd_eject(UNIT(drive));
3527 USETF(FD_DISK_CHANGED);
3529 process_fd_request();
3533 current_type[drive] = NULL;
3534 floppy_sizes[drive] = MAX_DISK_SIZE << 1;
3535 UDRS->keep_data = 0;
3536 return invalidate_drive(bdev);
3539 return set_geometry(cmd, &inparam.g,
3542 ECALL(get_floppy_geometry(drive, type,
3543 (struct floppy_struct **)
3548 UDP->flags |= FTD_MSG;
3551 UDP->flags &= ~FTD_MSG;
3556 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3558 process_fd_request();
3559 if (ret & FD_VERIFY)
3561 if (!(ret & FD_DISK_WRITABLE))
3565 if (UDRS->fd_ref != 1)
3567 return do_format(drive, &inparam.f);
3571 return invalidate_drive(bdev);
3573 case FDSETEMSGTRESH:
3574 UDP->max_errors.reporting =
3575 (unsigned short)(param & 0x0f);
3577 OUT(FDGETMAXERRS, &UDP->max_errors);
3578 IN(FDSETMAXERRS, &UDP->max_errors, max_errors);
3581 outparam = drive_name(type, drive);
3582 SUPBOUND(size, strlen(outparam) + 1);
3585 IN(FDSETDRVPRM, UDP, dp);
3586 OUT(FDGETDRVPRM, UDP);
3590 CALL(poll_drive(1, FD_RAW_NEED_DISK));
3591 process_fd_request();
3593 OUT(FDGETDRVSTAT, UDRS);
3596 return user_reset_fdc(drive, (int)param, 1);
3598 OUT(FDGETFDCSTAT, UFDCS);
3603 OUT(FDWERRORGET, UDRWE);
3610 CALL(i = raw_cmd_ioctl(cmd, (void __user *)param));
3611 process_fd_request();
3617 process_fd_request();
3624 if (_IOC_DIR(cmd) & _IOC_READ)
3625 return fd_copyout((void __user *)param, outparam, size);
3632 static void __init config_types(void)
3634 bool has_drive = false;
3637 /* read drive info out of physical CMOS */
3640 UDP->cmos = FLOPPY0_TYPE;
3642 if (!UDP->cmos && FLOPPY1_TYPE)
3643 UDP->cmos = FLOPPY1_TYPE;
3645 /* FIXME: additional physical CMOS drive detection should go here */
3647 for (drive = 0; drive < N_DRIVE; drive++) {
3648 unsigned int type = UDP->cmos;
3649 struct floppy_drive_params *params;
3650 const char *name = NULL;
3651 static char temparea[32];
3653 if (type < ARRAY_SIZE(default_drive_params)) {
3654 params = &default_drive_params[type].params;
3656 name = default_drive_params[type].name;
3657 allowed_drive_mask |= 1 << drive;
3659 allowed_drive_mask &= ~(1 << drive);
3661 params = &default_drive_params[0].params;
3662 sprintf(temparea, "unknown type %d (usb?)", type);
3666 const char *prepend;
3670 pr_info("Floppy drive(s):");
3675 pr_cont("%s fd%d is %s", prepend, drive, name);
3684 static int floppy_release(struct gendisk *disk, fmode_t mode)
3686 int drive = (long)disk->private_data;
3688 mutex_lock(&open_lock);
3689 if (UDRS->fd_ref < 0)
3691 else if (!UDRS->fd_ref--) {
3692 DPRINT("floppy_release with fd_ref == 0");
3696 opened_bdev[drive] = NULL;
3697 mutex_unlock(&open_lock);
3703 * floppy_open check for aliasing (/dev/fd0 can be the same as
3704 * /dev/PS0 etc), and disallows simultaneous access to the same
3705 * drive with different device numbers.
3707 static int floppy_open(struct block_device *bdev, fmode_t mode)
3709 int drive = (long)bdev->bd_disk->private_data;
3710 int old_dev, new_dev;
3715 mutex_lock(&open_lock);
3716 old_dev = UDRS->fd_device;
3717 if (opened_bdev[drive] && opened_bdev[drive] != bdev)
3720 if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) {
3721 USETF(FD_DISK_CHANGED);
3725 if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL)))
3728 if (mode & FMODE_EXCL)
3733 opened_bdev[drive] = bdev;
3737 if (!floppy_track_buffer) {
3738 /* if opening an ED drive, reserve a big buffer,
3739 * else reserve a small one */
3740 if ((UDP->cmos == 6) || (UDP->cmos == 5))
3741 try = 64; /* Only 48 actually useful */
3743 try = 32; /* Only 24 actually useful */
3745 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3746 if (!tmp && !floppy_track_buffer) {
3747 try >>= 1; /* buffer only one side */
3749 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3751 if (!tmp && !floppy_track_buffer)
3752 fallback_on_nodma_alloc(&tmp, 2048 * try);
3753 if (!tmp && !floppy_track_buffer) {
3754 DPRINT("Unable to allocate DMA memory\n");
3757 if (floppy_track_buffer) {
3759 fd_dma_mem_free((unsigned long)tmp, try * 1024);
3761 buffer_min = buffer_max = -1;
3762 floppy_track_buffer = tmp;
3763 max_buffer_sectors = try;
3767 new_dev = MINOR(bdev->bd_dev);
3768 UDRS->fd_device = new_dev;
3769 set_capacity(disks[drive], floppy_sizes[new_dev]);
3770 if (old_dev != -1 && old_dev != new_dev) {
3771 if (buffer_drive == drive)
3775 if (UFDCS->rawcmd == 1)
3778 if (!(mode & FMODE_NDELAY)) {
3779 if (mode & (FMODE_READ|FMODE_WRITE)) {
3780 UDRS->last_checked = 0;
3781 check_disk_change(bdev);
3782 if (UTESTF(FD_DISK_CHANGED))
3786 if ((mode & FMODE_WRITE) && !(UTESTF(FD_DISK_WRITABLE)))
3789 mutex_unlock(&open_lock);
3792 if (UDRS->fd_ref < 0)
3797 opened_bdev[drive] = NULL;
3799 mutex_unlock(&open_lock);
3804 * Check if the disk has been changed or if a change has been faked.
3806 static int check_floppy_change(struct gendisk *disk)
3808 int drive = (long)disk->private_data;
3810 if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY))
3813 if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) {
3816 process_fd_request();
3819 if (UTESTF(FD_DISK_CHANGED) ||
3820 UTESTF(FD_VERIFY) ||
3821 test_bit(drive, &fake_change) ||
3822 (!ITYPE(UDRS->fd_device) && !current_type[drive]))
3828 * This implements "read block 0" for floppy_revalidate().
3829 * Needed for format autodetection, checking whether there is
3830 * a disk in the drive, and whether that disk is writable.
3833 static void floppy_rb0_complete(struct bio *bio, int err)
3835 complete((struct completion *)bio->bi_private);
3838 static int __floppy_read_block_0(struct block_device *bdev)
3841 struct bio_vec bio_vec;
3842 struct completion complete;
3846 page = alloc_page(GFP_NOIO);
3848 process_fd_request();
3852 size = bdev->bd_block_size;
3857 bio.bi_io_vec = &bio_vec;
3858 bio_vec.bv_page = page;
3859 bio_vec.bv_len = size;
3860 bio_vec.bv_offset = 0;
3866 init_completion(&complete);
3867 bio.bi_private = &complete;
3868 bio.bi_end_io = floppy_rb0_complete;
3870 submit_bio(READ, &bio);
3871 generic_unplug_device(bdev_get_queue(bdev));
3872 process_fd_request();
3873 wait_for_completion(&complete);
3880 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
3881 * the bootblock (block 0). "Autodetection" is also needed to check whether
3882 * there is a disk in the drive at all... Thus we also do it for fixed
3883 * geometry formats */
3884 static int floppy_revalidate(struct gendisk *disk)
3886 int drive = (long)disk->private_data;
3887 #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device))
3891 if (UTESTF(FD_DISK_CHANGED) ||
3892 UTESTF(FD_VERIFY) || test_bit(drive, &fake_change) || NO_GEOM) {
3893 if (usage_count == 0) {
3894 pr_info("VFS: revalidate called on non-open device.\n");
3898 cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY);
3899 if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)) {
3900 process_fd_request(); /*already done by another thread */
3905 if (buffer_drive == drive)
3907 clear_bit(drive, &fake_change);
3908 UCLEARF(FD_DISK_CHANGED);
3913 res = __floppy_read_block_0(opened_bdev[drive]);
3916 poll_drive(0, FD_RAW_NEED_DISK);
3917 process_fd_request();
3920 set_capacity(disk, floppy_sizes[UDRS->fd_device]);
3924 static const struct block_device_operations floppy_fops = {
3925 .owner = THIS_MODULE,
3926 .open = floppy_open,
3927 .release = floppy_release,
3928 .locked_ioctl = fd_ioctl,
3929 .getgeo = fd_getgeo,
3930 .media_changed = check_floppy_change,
3931 .revalidate_disk = floppy_revalidate,
3935 * Floppy Driver initialization
3936 * =============================
3939 /* Determine the floppy disk controller type */
3940 /* This routine was written by David C. Niemi */
3941 static char __init get_fdc_version(void)
3945 output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */
3950 return FDC_NONE; /* No FDC present ??? */
3951 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3952 pr_info("FDC %d is an 8272A\n", fdc);
3953 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
3956 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
3961 if (!fdc_configure()) {
3962 pr_info("FDC %d is an 82072\n", fdc);
3963 return FDC_82072; /* 82072 doesn't know CONFIGURE */
3966 output_byte(FD_PERPENDICULAR);
3967 if (need_more_output() == MORE_OUTPUT) {
3970 pr_info("FDC %d is an 82072A\n", fdc);
3971 return FDC_82072A; /* 82072A as found on Sparcs. */
3974 output_byte(FD_UNLOCK);
3976 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3977 pr_info("FDC %d is a pre-1991 82077\n", fdc);
3978 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
3981 if ((r != 1) || (reply_buffer[0] != 0x00)) {
3982 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
3986 output_byte(FD_PARTID);
3989 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
3993 if (reply_buffer[0] == 0x80) {
3994 pr_info("FDC %d is a post-1991 82077\n", fdc);
3995 return FDC_82077; /* Revised 82077AA passes all the tests */
3997 switch (reply_buffer[0] >> 5) {
3999 /* Either a 82078-1 or a 82078SL running at 5Volt */
4000 pr_info("FDC %d is an 82078.\n", fdc);
4003 pr_info("FDC %d is a 44pin 82078\n", fdc);
4006 pr_info("FDC %d is a S82078B\n", fdc);
4009 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc);
4012 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n",
4013 fdc, reply_buffer[0] >> 5);
4014 return FDC_82078_UNKN;
4016 } /* get_fdc_version */
4018 /* lilo configuration */
4020 static void __init floppy_set_flags(int *ints, int param, int param2)
4024 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4026 default_drive_params[i].params.flags |= param2;
4028 default_drive_params[i].params.flags &= ~param2;
4030 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param);
4033 static void __init daring(int *ints, int param, int param2)
4037 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4039 default_drive_params[i].params.select_delay = 0;
4040 default_drive_params[i].params.flags |=
4041 FD_SILENT_DCL_CLEAR;
4043 default_drive_params[i].params.select_delay =
4045 default_drive_params[i].params.flags &=
4046 ~FD_SILENT_DCL_CLEAR;
4049 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken");
4052 static void __init set_cmos(int *ints, int dummy, int dummy2)
4054 int current_drive = 0;
4057 DPRINT("wrong number of parameters for CMOS\n");
4060 current_drive = ints[1];
4061 if (current_drive < 0 || current_drive >= 8) {
4062 DPRINT("bad drive for set_cmos\n");
4066 if (current_drive >= 4 && !FDC2)
4070 DPRINT("setting CMOS code to %d\n", ints[2]);
4073 static struct param_table {
4075 void (*fn) (int *ints, int param, int param2);
4079 } config_params[] __initdata = {
4080 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4081 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4082 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0},
4083 {"irq", NULL, &FLOPPY_IRQ, 6, 0},
4084 {"dma", NULL, &FLOPPY_DMA, 2, 0},
4085 {"daring", daring, NULL, 1, 0},
4087 {"two_fdc", NULL, &FDC2, 0x370, 0},
4088 {"one_fdc", NULL, &FDC2, 0, 0},
4090 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL},
4091 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL},
4092 {"messages", floppy_set_flags, NULL, 1, FTD_MSG},
4093 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR},
4094 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG},
4095 {"nodma", NULL, &can_use_virtual_dma, 1, 0},
4096 {"omnibook", NULL, &can_use_virtual_dma, 1, 0},
4097 {"yesdma", NULL, &can_use_virtual_dma, 0, 0},
4098 {"fifo_depth", NULL, &fifo_depth, 0xa, 0},
4099 {"nofifo", NULL, &no_fifo, 0x20, 0},
4100 {"usefifo", NULL, &no_fifo, 0, 0},
4101 {"cmos", set_cmos, NULL, 0, 0},
4102 {"slow", NULL, &slow_floppy, 1, 0},
4103 {"unexpected_interrupts", NULL, &print_unex, 1, 0},
4104 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0},
4105 {"L40SX", NULL, &print_unex, 0, 0}
4110 static int __init floppy_setup(char *str)
4116 str = get_options(str, ARRAY_SIZE(ints), ints);
4118 for (i = 0; i < ARRAY_SIZE(config_params); i++) {
4119 if (strcmp(str, config_params[i].name) == 0) {
4123 param = config_params[i].def_param;
4124 if (config_params[i].fn)
4125 config_params[i].fn(ints, param,
4128 if (config_params[i].var) {
4129 DPRINT("%s=%d\n", str, param);
4130 *config_params[i].var = param;
4137 DPRINT("unknown floppy option [%s]\n", str);
4139 DPRINT("allowed options are:");
4140 for (i = 0; i < ARRAY_SIZE(config_params); i++)
4141 pr_cont(" %s", config_params[i].name);
4144 DPRINT("botched floppy option\n");
4145 DPRINT("Read Documentation/blockdev/floppy.txt\n");
4149 static int have_no_fdc = -ENODEV;
4151 static ssize_t floppy_cmos_show(struct device *dev,
4152 struct device_attribute *attr, char *buf)
4154 struct platform_device *p = to_platform_device(dev);
4158 return sprintf(buf, "%X\n", UDP->cmos);
4161 DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL);
4163 static void floppy_device_release(struct device *dev)
4167 static int floppy_resume(struct device *dev)
4171 for (fdc = 0; fdc < N_FDC; fdc++)
4172 if (FDCS->address != -1)
4173 user_reset_fdc(-1, FD_RESET_ALWAYS, 0);
4178 static const struct dev_pm_ops floppy_pm_ops = {
4179 .resume = floppy_resume,
4180 .restore = floppy_resume,
4183 static struct platform_driver floppy_driver = {
4186 .pm = &floppy_pm_ops,
4190 static struct platform_device floppy_device[N_DRIVE];
4192 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
4194 int drive = (*part & 3) | ((*part & 0x80) >> 5);
4195 if (drive >= N_DRIVE ||
4196 !(allowed_drive_mask & (1 << drive)) ||
4197 fdc_state[FDC(drive)].version == FDC_NONE)
4199 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type))
4202 return get_disk(disks[drive]);
4205 static int __init floppy_init(void)
4210 #if defined(CONFIG_PPC)
4211 if (check_legacy_ioport(FDC1))
4217 for (dr = 0; dr < N_DRIVE; dr++) {
4218 disks[dr] = alloc_disk(1);
4224 disks[dr]->major = FLOPPY_MAJOR;
4225 disks[dr]->first_minor = TOMINOR(dr);
4226 disks[dr]->fops = &floppy_fops;
4227 sprintf(disks[dr]->disk_name, "fd%d", dr);
4229 init_timer(&motor_off_timer[dr]);
4230 motor_off_timer[dr].data = dr;
4231 motor_off_timer[dr].function = motor_off_callback;
4234 err = register_blkdev(FLOPPY_MAJOR, "fd");
4238 err = platform_driver_register(&floppy_driver);
4240 goto out_unreg_blkdev;
4242 floppy_queue = blk_init_queue(do_fd_request, &floppy_lock);
4243 if (!floppy_queue) {
4245 goto out_unreg_driver;
4247 blk_queue_max_hw_sectors(floppy_queue, 64);
4249 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
4250 floppy_find, NULL, NULL);
4252 for (i = 0; i < 256; i++)
4254 floppy_sizes[i] = floppy_type[ITYPE(i)].size;
4256 floppy_sizes[i] = MAX_DISK_SIZE << 1;
4258 reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT);
4261 for (i = 0; i < N_FDC; i++) {
4266 #if defined(__sparc__) || defined(__mc68000__)
4267 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4271 FDCS->version = FDC_82072A;
4275 use_virtual_dma = can_use_virtual_dma & 1;
4276 fdc_state[0].address = FDC1;
4277 if (fdc_state[0].address == -1) {
4278 del_timer(&fd_timeout);
4280 goto out_unreg_region;
4283 fdc_state[1].address = FDC2;
4286 fdc = 0; /* reset fdc in case of unexpected interrupt */
4287 err = floppy_grab_irq_and_dma();
4289 del_timer(&fd_timeout);
4291 goto out_unreg_region;
4294 /* initialise drive state */
4295 for (drive = 0; drive < N_DRIVE; drive++) {
4298 USETF(FD_DISK_NEWCHANGE);
4299 USETF(FD_DISK_CHANGED);
4301 UDRS->fd_device = -1;
4302 floppy_track_buffer = NULL;
4303 max_buffer_sectors = 0;
4306 * Small 10 msec delay to let through any interrupt that
4307 * initialization might have triggered, to not
4308 * confuse detection:
4312 for (i = 0; i < N_FDC; i++) {
4314 FDCS->driver_version = FD_DRIVER_VERSION;
4315 for (unit = 0; unit < 4; unit++)
4316 FDCS->track[unit] = 0;
4317 if (FDCS->address == -1)
4320 if (user_reset_fdc(-1, FD_RESET_ALWAYS, 0)) {
4321 /* free ioports reserved by floppy_grab_irq_and_dma() */
4322 floppy_release_regions(fdc);
4324 FDCS->version = FDC_NONE;
4327 /* Try to determine the floppy controller type */
4328 FDCS->version = get_fdc_version();
4329 if (FDCS->version == FDC_NONE) {
4330 /* free ioports reserved by floppy_grab_irq_and_dma() */
4331 floppy_release_regions(fdc);
4335 if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A)
4336 can_use_virtual_dma = 0;
4339 /* Not all FDCs seem to be able to handle the version command
4340 * properly, so force a reset for the standard FDC clones,
4341 * to avoid interrupt garbage.
4343 user_reset_fdc(-1, FD_RESET_ALWAYS, 0);
4346 del_timer(&fd_timeout);
4350 DPRINT("no floppy controllers found\n");
4352 goto out_flush_work;
4355 for (drive = 0; drive < N_DRIVE; drive++) {
4356 if (!(allowed_drive_mask & (1 << drive)))
4358 if (fdc_state[FDC(drive)].version == FDC_NONE)
4361 floppy_device[drive].name = floppy_device_name;
4362 floppy_device[drive].id = drive;
4363 floppy_device[drive].dev.release = floppy_device_release;
4365 err = platform_device_register(&floppy_device[drive]);
4367 goto out_flush_work;
4369 err = device_create_file(&floppy_device[drive].dev,
4372 goto out_unreg_platform_dev;
4374 /* to be cleaned up... */
4375 disks[drive]->private_data = (void *)(long)drive;
4376 disks[drive]->queue = floppy_queue;
4377 disks[drive]->flags |= GENHD_FL_REMOVABLE;
4378 disks[drive]->driverfs_dev = &floppy_device[drive].dev;
4379 add_disk(disks[drive]);
4384 out_unreg_platform_dev:
4385 platform_device_unregister(&floppy_device[drive]);
4387 flush_scheduled_work();
4389 floppy_release_irq_and_dma();
4391 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4392 blk_cleanup_queue(floppy_queue);
4394 platform_driver_unregister(&floppy_driver);
4396 unregister_blkdev(FLOPPY_MAJOR, "fd");
4399 del_timer(&motor_off_timer[dr]);
4400 put_disk(disks[dr]);
4405 static DEFINE_SPINLOCK(floppy_usage_lock);
4407 static const struct io_region {
4412 /* address + 3 is sometimes reserved by pnp bios for motherboard */
4414 /* address + 6 is reserved, and may be taken by IDE.
4415 * Unfortunately, Adaptec doesn't know this :-(, */
4419 static void floppy_release_allocated_regions(int fdc, const struct io_region *p)
4421 while (p != io_regions) {
4423 release_region(FDCS->address + p->offset, p->size);
4427 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
4429 static int floppy_request_regions(int fdc)
4431 const struct io_region *p;
4433 for (p = io_regions; p < ARRAY_END(io_regions); p++) {
4434 if (!request_region(FDCS->address + p->offset,
4435 p->size, "floppy")) {
4436 DPRINT("Floppy io-port 0x%04lx in use\n",
4437 FDCS->address + p->offset);
4438 floppy_release_allocated_regions(fdc, p);
4445 static void floppy_release_regions(int fdc)
4447 floppy_release_allocated_regions(fdc, ARRAY_END(io_regions));
4450 static int floppy_grab_irq_and_dma(void)
4452 unsigned long flags;
4454 spin_lock_irqsave(&floppy_usage_lock, flags);
4455 if (usage_count++) {
4456 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4459 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4462 * We might have scheduled a free_irq(), wait it to
4465 flush_scheduled_work();
4467 if (fd_request_irq()) {
4468 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4470 spin_lock_irqsave(&floppy_usage_lock, flags);
4472 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4475 if (fd_request_dma()) {
4476 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4478 if (can_use_virtual_dma & 2)
4479 use_virtual_dma = can_use_virtual_dma = 1;
4480 if (!(can_use_virtual_dma & 1)) {
4482 spin_lock_irqsave(&floppy_usage_lock, flags);
4484 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4489 for (fdc = 0; fdc < N_FDC; fdc++) {
4490 if (FDCS->address != -1) {
4491 if (floppy_request_regions(fdc))
4495 for (fdc = 0; fdc < N_FDC; fdc++) {
4496 if (FDCS->address != -1) {
4498 fd_outb(FDCS->dor, FD_DOR);
4502 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4504 for (fdc = 0; fdc < N_FDC; fdc++)
4505 if (FDCS->address != -1)
4506 fd_outb(FDCS->dor, FD_DOR);
4508 * The driver will try and free resources and relies on us
4509 * to know if they were allocated or not.
4512 irqdma_allocated = 1;
4518 floppy_release_regions(fdc);
4519 spin_lock_irqsave(&floppy_usage_lock, flags);
4521 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4525 static void floppy_release_irq_and_dma(void)
4528 #ifdef FLOPPY_SANITY_CHECK
4534 unsigned long tmpaddr;
4535 unsigned long flags;
4537 spin_lock_irqsave(&floppy_usage_lock, flags);
4538 if (--usage_count) {
4539 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4542 spin_unlock_irqrestore(&floppy_usage_lock, flags);
4543 if (irqdma_allocated) {
4547 irqdma_allocated = 0;
4553 floppy_enable_hlt();
4555 if (floppy_track_buffer && max_buffer_sectors) {
4556 tmpsize = max_buffer_sectors * 1024;
4557 tmpaddr = (unsigned long)floppy_track_buffer;
4558 floppy_track_buffer = NULL;
4559 max_buffer_sectors = 0;
4560 buffer_min = buffer_max = -1;
4561 fd_dma_mem_free(tmpaddr, tmpsize);
4563 #ifdef FLOPPY_SANITY_CHECK
4565 for (drive = 0; drive < N_FDC * 4; drive++)
4566 if (timer_pending(motor_off_timer + drive))
4567 pr_info("motor off timer %d still active\n", drive);
4570 if (timer_pending(&fd_timeout))
4571 pr_info("floppy timer still active:%s\n", timeout_message);
4572 if (timer_pending(&fd_timer))
4573 pr_info("auxiliary floppy timer still active\n");
4574 if (work_pending(&floppy_work))
4575 pr_info("work still pending\n");
4578 for (fdc = 0; fdc < N_FDC; fdc++)
4579 if (FDCS->address != -1)
4580 floppy_release_regions(fdc);
4586 static char *floppy;
4588 static void __init parse_floppy_cfg_string(char *cfg)
4594 while (*cfg && *cfg != ' ' && *cfg != '\t')
4605 static int __init floppy_module_init(void)
4608 parse_floppy_cfg_string(floppy);
4609 return floppy_init();
4611 module_init(floppy_module_init);
4613 static void __exit floppy_module_exit(void)
4617 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4618 unregister_blkdev(FLOPPY_MAJOR, "fd");
4619 platform_driver_unregister(&floppy_driver);
4621 for (drive = 0; drive < N_DRIVE; drive++) {
4622 del_timer_sync(&motor_off_timer[drive]);
4624 if ((allowed_drive_mask & (1 << drive)) &&
4625 fdc_state[FDC(drive)].version != FDC_NONE) {
4626 del_gendisk(disks[drive]);
4627 device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
4628 platform_device_unregister(&floppy_device[drive]);
4630 put_disk(disks[drive]);
4633 del_timer_sync(&fd_timeout);
4634 del_timer_sync(&fd_timer);
4635 blk_cleanup_queue(floppy_queue);
4638 floppy_release_irq_and_dma();
4640 /* eject disk, if any */
4644 module_exit(floppy_module_exit);
4646 module_param(floppy, charp, 0);
4647 module_param(FLOPPY_IRQ, int, 0);
4648 module_param(FLOPPY_DMA, int, 0);
4649 MODULE_AUTHOR("Alain L. Knaff");
4650 MODULE_SUPPORTED_DEVICE("fd");
4651 MODULE_LICENSE("GPL");
4653 /* This doesn't actually get used other than for module information */
4654 static const struct pnp_device_id floppy_pnpids[] = {
4659 MODULE_DEVICE_TABLE(pnp, floppy_pnpids);
4663 __setup("floppy=", floppy_setup);
4664 module_init(floppy_init)
4667 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);