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 #undef FLOPPY_SILENT_DCL_CLEAR
149 #define REALLY_SLOW_IO
153 #define DPRINT(format, args...) \
154 pr_info("floppy%d: " format, current_drive, ##args)
156 #define DCL_DEBUG /* debug disk change line */
158 #define debug_dcl(test, fmt, args...) \
159 do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0)
161 #define debug_dcl(test, fmt, args...) \
162 do { if (0) DPRINT(fmt, ##args); } while (0)
165 /* do print messages for unexpected interrupts */
166 static int print_unex = 1;
167 #include <linux/module.h>
168 #include <linux/sched.h>
169 #include <linux/fs.h>
170 #include <linux/kernel.h>
171 #include <linux/timer.h>
172 #include <linux/workqueue.h>
174 #include <linux/fdreg.h>
175 #include <linux/fd.h>
176 #include <linux/hdreg.h>
177 #include <linux/errno.h>
178 #include <linux/slab.h>
179 #include <linux/mm.h>
180 #include <linux/bio.h>
181 #include <linux/string.h>
182 #include <linux/jiffies.h>
183 #include <linux/fcntl.h>
184 #include <linux/delay.h>
185 #include <linux/mc146818rtc.h> /* CMOS defines */
186 #include <linux/ioport.h>
187 #include <linux/interrupt.h>
188 #include <linux/init.h>
189 #include <linux/platform_device.h>
190 #include <linux/mod_devicetable.h>
191 #include <linux/buffer_head.h> /* for invalidate_buffers() */
192 #include <linux/mutex.h>
193 #include <linux/io.h>
194 #include <linux/uaccess.h>
197 * PS/2 floppies have much slower step rates than regular floppies.
198 * It's been recommended that take about 1/4 of the default speed
199 * in some more extreme cases.
201 static int slow_floppy;
205 #include <asm/system.h>
207 static int FLOPPY_IRQ = 6;
208 static int FLOPPY_DMA = 2;
209 static int can_use_virtual_dma = 2;
211 * can use virtual DMA:
212 * 0 = use of virtual DMA disallowed by config
213 * 1 = use of virtual DMA prescribed by config
214 * 2 = no virtual DMA preference configured. By default try hard DMA,
215 * but fall back on virtual DMA when not enough memory available
218 static int use_virtual_dma;
222 * 1 using virtual DMA
223 * This variable is set to virtual when a DMA mem problem arises, and
224 * reset back in floppy_grab_irq_and_dma.
225 * It is not safe to reset it in other circumstances, because the floppy
226 * driver may have several buffers in use at once, and we do currently not
227 * record each buffers capabilities
230 static DEFINE_SPINLOCK(floppy_lock);
232 static unsigned short virtual_dma_port = 0x3f0;
233 irqreturn_t floppy_interrupt(int irq, void *dev_id);
234 static int set_dor(int fdc, char mask, char data);
236 #define K_64 0x10000 /* 64KB */
238 /* the following is the mask of allowed drives. By default units 2 and
239 * 3 of both floppy controllers are disabled, because switching on the
240 * motor of these drives causes system hangs on some PCI computers. drive
241 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
242 * a drive is allowed.
244 * NOTE: This must come before we include the arch floppy header because
245 * some ports reference this variable from there. -DaveM
248 static int allowed_drive_mask = 0x33;
250 #include <asm/floppy.h>
252 static int irqdma_allocated;
254 #include <linux/blkdev.h>
255 #include <linux/blkpg.h>
256 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
257 #include <linux/completion.h>
259 static struct request *current_req;
260 static struct request_queue *floppy_queue;
261 static void do_fd_request(struct request_queue *q);
263 #ifndef fd_get_dma_residue
264 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
267 /* Dma Memory related stuff */
269 #ifndef fd_dma_mem_free
270 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
273 #ifndef fd_dma_mem_alloc
274 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size))
277 static inline void fallback_on_nodma_alloc(char **addr, size_t l)
279 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
281 return; /* we have the memory */
282 if (can_use_virtual_dma != 2)
283 return; /* no fallback allowed */
284 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n");
285 *addr = (char *)nodma_mem_alloc(l);
291 /* End dma memory related stuff */
293 static unsigned long fake_change;
294 static bool initialized;
296 #define ITYPE(x) (((x) >> 2) & 0x1f)
297 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
298 #define UNIT(x) ((x) & 0x03) /* drive on fdc */
299 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
300 /* reverse mapping from unit and fdc to drive */
301 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
303 #define DP (&drive_params[current_drive])
304 #define DRS (&drive_state[current_drive])
305 #define DRWE (&write_errors[current_drive])
306 #define FDCS (&fdc_state[fdc])
308 #define UDP (&drive_params[drive])
309 #define UDRS (&drive_state[drive])
310 #define UDRWE (&write_errors[drive])
311 #define UFDCS (&fdc_state[FDC(drive)])
313 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
314 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
317 #define COMMAND (raw_cmd->cmd[0])
318 #define DR_SELECT (raw_cmd->cmd[1])
319 #define TRACK (raw_cmd->cmd[2])
320 #define HEAD (raw_cmd->cmd[3])
321 #define SECTOR (raw_cmd->cmd[4])
322 #define SIZECODE (raw_cmd->cmd[5])
323 #define SECT_PER_TRACK (raw_cmd->cmd[6])
324 #define GAP (raw_cmd->cmd[7])
325 #define SIZECODE2 (raw_cmd->cmd[8])
329 #define F_SIZECODE (raw_cmd->cmd[2])
330 #define F_SECT_PER_TRACK (raw_cmd->cmd[3])
331 #define F_GAP (raw_cmd->cmd[4])
332 #define F_FILL (raw_cmd->cmd[5])
336 * Maximum disk size (in kilobytes).
337 * This default is used whenever the current disk size is unknown.
338 * [Now it is rather a minimum]
340 #define MAX_DISK_SIZE 4 /* 3984 */
343 * globals used by 'result()'
345 #define MAX_REPLIES 16
346 static unsigned char reply_buffer[MAX_REPLIES];
347 static int inr; /* size of reply buffer, when called from interrupt */
348 #define ST0 (reply_buffer[0])
349 #define ST1 (reply_buffer[1])
350 #define ST2 (reply_buffer[2])
351 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */
352 #define R_TRACK (reply_buffer[3])
353 #define R_HEAD (reply_buffer[4])
354 #define R_SECTOR (reply_buffer[5])
355 #define R_SIZECODE (reply_buffer[6])
357 #define SEL_DLY (2 * HZ / 100)
360 * this struct defines the different floppy drive types.
363 struct floppy_drive_params params;
364 const char *name; /* name printed while booting */
365 } default_drive_params[] = {
366 /* NOTE: the time values in jiffies should be in msec!
368 | Maximum data rate supported by drive type
369 | | Head load time, msec
370 | | | Head unload time, msec (not used)
371 | | | | Step rate interval, usec
372 | | | | | Time needed for spinup time (jiffies)
373 | | | | | | Timeout for spinning down (jiffies)
374 | | | | | | | Spindown offset (where disk stops)
375 | | | | | | | | Select delay
376 | | | | | | | | | RPS
377 | | | | | | | | | | Max number of tracks
378 | | | | | | | | | | | Interrupt timeout
379 | | | | | | | | | | | | Max nonintlv. sectors
380 | | | | | | | | | | | | | -Max Errors- flags */
381 {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0,
382 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" },
384 {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0,
385 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
387 {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0,
388 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
390 {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
391 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/
393 {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
394 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/
396 {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
397 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
399 {{6, 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" } /*3 1/2 ED*/
401 /* | --autodetected formats--- | | |
402 * read_track | | Name printed when booting
404 * Frequency of disk change checks */
407 static struct floppy_drive_params drive_params[N_DRIVE];
408 static struct floppy_drive_struct drive_state[N_DRIVE];
409 static struct floppy_write_errors write_errors[N_DRIVE];
410 static struct timer_list motor_off_timer[N_DRIVE];
411 static struct gendisk *disks[N_DRIVE];
412 static struct block_device *opened_bdev[N_DRIVE];
413 static DEFINE_MUTEX(open_lock);
414 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
417 * This struct defines the different floppy types.
419 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
420 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
421 * tells if the disk is in Commodore 1581 format, which means side 0 sectors
422 * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
423 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
424 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
425 * side 0 is on physical side 0 (but with the misnamed sector IDs).
426 * 'stretch' should probably be renamed to something more general, like
429 * Bits 2 through 9 of 'stretch' tell the number of the first sector.
430 * The LSB (bit 2) is flipped. For most disks, the first sector
431 * is 1 (represented by 0x00<<2). For some CP/M and music sampler
432 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
433 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
435 * Other parameters should be self-explanatory (see also setfdprm(8)).
444 | | | | | | Data rate, | 0x40 for perp
445 | | | | | | | Spec1 (stepping rate, head unload
446 | | | | | | | | /fmt gap (gap2) */
447 static struct floppy_struct floppy_type[32] = {
448 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */
449 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
450 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
451 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
452 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
453 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
454 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
455 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
456 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
457 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
459 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
460 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
461 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
462 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
463 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
464 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
465 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
466 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
467 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
468 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
470 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
471 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
472 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
473 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
474 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
475 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
476 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
477 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
478 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
479 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
481 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
482 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
485 #define SECTSIZE (_FD_SECTSIZE(*floppy))
487 /* Auto-detection: Disk type used until the next media change occurs. */
488 static struct floppy_struct *current_type[N_DRIVE];
491 * User-provided type information. current_type points to
492 * the respective entry of this array.
494 static struct floppy_struct user_params[N_DRIVE];
496 static sector_t floppy_sizes[256];
498 static char floppy_device_name[] = "floppy";
501 * The driver is trying to determine the correct media format
502 * while probing is set. rw_interrupt() clears it after a
507 /* Synchronization of FDC access. */
508 #define FD_COMMAND_NONE -1
509 #define FD_COMMAND_ERROR 2
510 #define FD_COMMAND_OKAY 3
512 static volatile int command_status = FD_COMMAND_NONE;
513 static unsigned long fdc_busy;
514 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
515 static DECLARE_WAIT_QUEUE_HEAD(command_done);
517 #define NO_SIGNAL (!interruptible || !signal_pending(current))
519 /* Errors during formatting are counted here. */
520 static int format_errors;
522 /* Format request descriptor. */
523 static struct format_descr format_req;
526 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
527 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
528 * H is head unload time (1=16ms, 2=32ms, etc)
533 * Because these are written to by the DMA controller, they must
534 * not contain a 64k byte boundary crossing, or data will be
537 static char *floppy_track_buffer;
538 static int max_buffer_sectors;
541 typedef void (*done_f)(int);
542 static struct cont_t {
543 void (*interrupt)(void);
544 /* this is called after the interrupt of the
546 void (*redo)(void); /* this is called to retry the operation */
547 void (*error)(void); /* this is called to tally an error */
548 done_f done; /* this is called to say if the operation has
549 * succeeded/failed */
552 static void floppy_ready(void);
553 static void floppy_start(void);
554 static void process_fd_request(void);
555 static void recalibrate_floppy(void);
556 static void floppy_shutdown(unsigned long);
558 static int floppy_request_regions(int);
559 static void floppy_release_regions(int);
560 static int floppy_grab_irq_and_dma(void);
561 static void floppy_release_irq_and_dma(void);
564 * The "reset" variable should be tested whenever an interrupt is scheduled,
565 * after the commands have been sent. This is to ensure that the driver doesn't
566 * get wedged when the interrupt doesn't come because of a failed command.
567 * reset doesn't need to be tested before sending commands, because
568 * output_byte is automatically disabled when reset is set.
570 static void reset_fdc(void);
573 * These are global variables, as that's the easiest way to give
574 * information to interrupts. They are the data used for the current
578 #define NEED_1_RECAL -2
579 #define NEED_2_RECAL -3
581 static atomic_t usage_count = ATOMIC_INIT(0);
583 /* buffer related variables */
584 static int buffer_track = -1;
585 static int buffer_drive = -1;
586 static int buffer_min = -1;
587 static int buffer_max = -1;
589 /* fdc related variables, should end up in a struct */
590 static struct floppy_fdc_state fdc_state[N_FDC];
591 static int fdc; /* current fdc */
593 static struct floppy_struct *_floppy = floppy_type;
594 static unsigned char current_drive;
595 static long current_count_sectors;
596 static unsigned char fsector_t; /* sector in track */
597 static unsigned char in_sector_offset; /* offset within physical sector,
598 * expressed in units of 512 bytes */
601 static inline int fd_eject(int drive)
612 static long unsigned debugtimer;
614 static inline void set_debugt(void)
616 debugtimer = jiffies;
619 static inline void debugt(const char *func, const char *msg)
621 if (DP->flags & DEBUGT)
622 pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer);
625 static inline void set_debugt(void) { }
626 static inline void debugt(const char *func, const char *msg) { }
629 typedef void (*timeout_fn)(unsigned long);
630 static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0);
632 static const char *timeout_message;
634 static void is_alive(const char *func, const char *message)
636 /* this routine checks whether the floppy driver is "alive" */
637 if (test_bit(0, &fdc_busy) && command_status < 2 &&
638 !timer_pending(&fd_timeout)) {
639 DPRINT("%s: timeout handler died. %s\n", func, message);
643 static void (*do_floppy)(void) = NULL;
647 static void (*lasthandler)(void);
648 static unsigned long interruptjiffies;
649 static unsigned long resultjiffies;
650 static int resultsize;
651 static unsigned long lastredo;
653 static struct output_log {
655 unsigned char status;
656 unsigned long jiffies;
657 } output_log[OLOGSIZE];
659 static int output_log_pos;
661 #define current_reqD -1
662 #define MAXTIMEOUT -2
664 static void __reschedule_timeout(int drive, const char *message)
666 if (drive == current_reqD)
667 drive = current_drive;
668 del_timer(&fd_timeout);
669 if (drive < 0 || drive >= N_DRIVE) {
670 fd_timeout.expires = jiffies + 20UL * HZ;
673 fd_timeout.expires = jiffies + UDP->timeout;
674 add_timer(&fd_timeout);
675 if (UDP->flags & FD_DEBUG)
676 DPRINT("reschedule timeout %s\n", message);
677 timeout_message = message;
680 static void reschedule_timeout(int drive, const char *message)
684 spin_lock_irqsave(&floppy_lock, flags);
685 __reschedule_timeout(drive, message);
686 spin_unlock_irqrestore(&floppy_lock, flags);
689 #define INFBOUND(a, b) (a) = max_t(int, a, b)
690 #define SUPBOUND(a, b) (a) = min_t(int, a, b)
693 * Bottom half floppy driver.
694 * ==========================
696 * This part of the file contains the code talking directly to the hardware,
697 * and also the main service loop (seek-configure-spinup-command)
702 * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
703 * and the last_checked date.
705 * last_checked is the date of the last check which showed 'no disk change'
706 * FD_DISK_CHANGE is set under two conditions:
707 * 1. The floppy has been changed after some i/o to that floppy already
709 * 2. No floppy disk is in the drive. This is done in order to ensure that
710 * requests are quickly flushed in case there is no disk in the drive. It
711 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
714 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
715 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
716 * each seek. If a disk is present, the disk change line should also be
717 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
718 * change line is set, this means either that no disk is in the drive, or
719 * that it has been removed since the last seek.
721 * This means that we really have a third possibility too:
722 * The floppy has been changed after the last seek.
725 static int disk_change(int drive)
727 int fdc = FDC(drive);
729 if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
730 DPRINT("WARNING disk change called early\n");
731 if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
732 (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
733 DPRINT("probing disk change on unselected drive\n");
734 DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive),
735 (unsigned int)FDCS->dor);
738 debug_dcl(UDP->flags,
739 "checking disk change line for drive %d\n", drive);
740 debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies);
741 debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80);
742 debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags);
744 if (UDP->flags & FD_BROKEN_DCL)
745 return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
746 if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) {
747 set_bit(FD_VERIFY_BIT, &UDRS->flags);
748 /* verify write protection */
750 if (UDRS->maxblock) /* mark it changed */
751 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
753 /* invalidate its geometry */
754 if (UDRS->keep_data >= 0) {
755 if ((UDP->flags & FTD_MSG) &&
756 current_type[drive] != NULL)
757 DPRINT("Disk type is undefined after disk change\n");
758 current_type[drive] = NULL;
759 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1;
764 UDRS->last_checked = jiffies;
765 clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags);
770 static inline int is_selected(int dor, int unit)
772 return ((dor & (0x10 << unit)) && (dor & 3) == unit);
775 static bool is_ready_state(int status)
777 int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA);
778 return state == STATUS_READY;
781 static int set_dor(int fdc, char mask, char data)
785 unsigned char newdor;
786 unsigned char olddor;
788 if (FDCS->address == -1)
792 newdor = (olddor & mask) | data;
793 if (newdor != olddor) {
795 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) {
796 drive = REVDRIVE(fdc, unit);
797 debug_dcl(UDP->flags,
798 "calling disk change from set_dor\n");
802 fd_outb(newdor, FD_DOR);
805 if (!is_selected(olddor, unit) && is_selected(newdor, unit)) {
806 drive = REVDRIVE(fdc, unit);
807 UDRS->select_date = jiffies;
813 static void twaddle(void)
815 if (DP->select_delay)
817 fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR);
818 fd_outb(FDCS->dor, FD_DOR);
819 DRS->select_date = jiffies;
823 * Reset all driver information about the current fdc.
824 * This is needed after a reset, and after a raw command.
826 static void reset_fdc_info(int mode)
830 FDCS->spec1 = FDCS->spec2 = -1;
831 FDCS->need_configure = 1;
834 for (drive = 0; drive < N_DRIVE; drive++)
835 if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL))
836 UDRS->track = NEED_2_RECAL;
839 /* selects the fdc and drive, and enables the fdc's input/dma. */
840 static void set_fdc(int drive)
842 if (drive >= 0 && drive < N_DRIVE) {
844 current_drive = drive;
846 if (fdc != 1 && fdc != 0) {
847 pr_info("bad fdc value\n");
852 set_dor(1 - fdc, ~8, 0);
854 if (FDCS->rawcmd == 2)
856 if (fd_inb(FD_STATUS) != STATUS_READY)
860 /* locks the driver */
861 static int _lock_fdc(int drive, bool interruptible, int line)
863 if (atomic_read(&usage_count) == 0) {
864 pr_err("Trying to lock fdc while usage count=0 at line %d\n",
869 if (test_and_set_bit(0, &fdc_busy)) {
870 DECLARE_WAITQUEUE(wait, current);
871 add_wait_queue(&fdc_wait, &wait);
874 set_current_state(TASK_INTERRUPTIBLE);
876 if (!test_and_set_bit(0, &fdc_busy))
882 remove_wait_queue(&fdc_wait, &wait);
887 set_current_state(TASK_RUNNING);
888 remove_wait_queue(&fdc_wait, &wait);
889 flush_scheduled_work();
891 command_status = FD_COMMAND_NONE;
893 __reschedule_timeout(drive, "lock fdc");
898 #define lock_fdc(drive, interruptible) \
899 _lock_fdc(drive, interruptible, __LINE__)
901 /* unlocks the driver */
902 static void unlock_fdc(void)
907 if (!test_bit(0, &fdc_busy))
908 DPRINT("FDC access conflict!\n");
911 DPRINT("device interrupt still active at FDC release: %pf!\n",
913 command_status = FD_COMMAND_NONE;
914 spin_lock_irqsave(&floppy_lock, flags);
915 del_timer(&fd_timeout);
917 clear_bit(0, &fdc_busy);
918 if (current_req || blk_peek_request(floppy_queue))
919 do_fd_request(floppy_queue);
920 spin_unlock_irqrestore(&floppy_lock, flags);
924 /* switches the motor off after a given timeout */
925 static void motor_off_callback(unsigned long nr)
927 unsigned char mask = ~(0x10 << UNIT(nr));
929 set_dor(FDC(nr), mask, 0);
932 /* schedules motor off */
933 static void floppy_off(unsigned int drive)
935 unsigned long volatile delta;
936 int fdc = FDC(drive);
938 if (!(FDCS->dor & (0x10 << UNIT(drive))))
941 del_timer(motor_off_timer + drive);
943 /* make spindle stop in a position which minimizes spinup time
946 delta = jiffies - UDRS->first_read_date + HZ -
947 UDP->spindown_offset;
948 delta = ((delta * UDP->rps) % HZ) / UDP->rps;
949 motor_off_timer[drive].expires =
950 jiffies + UDP->spindown - delta;
952 add_timer(motor_off_timer + drive);
956 * cycle through all N_DRIVE floppy drives, for disk change testing.
957 * stopping at current drive. This is done before any long operation, to
958 * be sure to have up to date disk change information.
960 static void scandrives(void)
966 if (DP->select_delay)
969 saved_drive = current_drive;
970 for (i = 0; i < N_DRIVE; i++) {
971 drive = (saved_drive + i + 1) % N_DRIVE;
972 if (UDRS->fd_ref == 0 || UDP->select_delay != 0)
973 continue; /* skip closed drives */
975 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &
976 (0x10 << UNIT(drive))))
977 /* switch the motor off again, if it was off to
979 set_dor(fdc, ~(0x10 << UNIT(drive)), 0);
981 set_fdc(saved_drive);
984 static void empty(void)
988 static DECLARE_WORK(floppy_work, NULL);
990 static void schedule_bh(void (*handler)(void))
992 PREPARE_WORK(&floppy_work, (work_func_t)handler);
993 schedule_work(&floppy_work);
996 static DEFINE_TIMER(fd_timer, NULL, 0, 0);
998 static void cancel_activity(void)
1000 unsigned long flags;
1002 spin_lock_irqsave(&floppy_lock, flags);
1004 PREPARE_WORK(&floppy_work, (work_func_t)empty);
1005 del_timer(&fd_timer);
1006 spin_unlock_irqrestore(&floppy_lock, flags);
1009 /* this function makes sure that the disk stays in the drive during the
1011 static void fd_watchdog(void)
1013 debug_dcl(DP->flags, "calling disk change from watchdog\n");
1015 if (disk_change(current_drive)) {
1016 DPRINT("disk removed during i/o\n");
1021 del_timer(&fd_timer);
1022 fd_timer.function = (timeout_fn)fd_watchdog;
1023 fd_timer.expires = jiffies + HZ / 10;
1024 add_timer(&fd_timer);
1028 static void main_command_interrupt(void)
1030 del_timer(&fd_timer);
1034 /* waits for a delay (spinup or select) to pass */
1035 static int fd_wait_for_completion(unsigned long delay, timeout_fn function)
1038 reset_fdc(); /* do the reset during sleep to win time
1039 * if we don't need to sleep, it's a good
1040 * occasion anyways */
1044 if (time_before(jiffies, delay)) {
1045 del_timer(&fd_timer);
1046 fd_timer.function = function;
1047 fd_timer.expires = delay;
1048 add_timer(&fd_timer);
1054 static DEFINE_SPINLOCK(floppy_hlt_lock);
1055 static int hlt_disabled;
1056 static void floppy_disable_hlt(void)
1058 unsigned long flags;
1060 spin_lock_irqsave(&floppy_hlt_lock, flags);
1061 if (!hlt_disabled) {
1063 #ifdef HAVE_DISABLE_HLT
1067 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1070 static void floppy_enable_hlt(void)
1072 unsigned long flags;
1074 spin_lock_irqsave(&floppy_hlt_lock, flags);
1077 #ifdef HAVE_DISABLE_HLT
1081 spin_unlock_irqrestore(&floppy_hlt_lock, flags);
1084 static void setup_DMA(void)
1088 if (raw_cmd->length == 0) {
1091 pr_info("zero dma transfer size:");
1092 for (i = 0; i < raw_cmd->cmd_count; i++)
1093 pr_cont("%x,", raw_cmd->cmd[i]);
1099 if (((unsigned long)raw_cmd->kernel_data) % 512) {
1100 pr_info("non aligned address: %p\n", raw_cmd->kernel_data);
1105 f = claim_dma_lock();
1108 if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length,
1109 (raw_cmd->flags & FD_RAW_READ) ?
1110 DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) {
1111 release_dma_lock(f);
1116 release_dma_lock(f);
1119 fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length);
1120 fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ?
1121 DMA_MODE_READ : DMA_MODE_WRITE);
1122 fd_set_dma_addr(raw_cmd->kernel_data);
1123 fd_set_dma_count(raw_cmd->length);
1124 virtual_dma_port = FDCS->address;
1126 release_dma_lock(f);
1128 floppy_disable_hlt();
1131 static void show_floppy(void);
1133 /* waits until the fdc becomes ready */
1134 static int wait_til_ready(void)
1141 for (counter = 0; counter < 10000; counter++) {
1142 status = fd_inb(FD_STATUS);
1143 if (status & STATUS_READY)
1147 DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc);
1154 /* sends a command byte to the fdc */
1155 static int output_byte(char byte)
1157 int status = wait_til_ready();
1162 if (is_ready_state(status)) {
1163 fd_outb(byte, FD_DATA);
1164 output_log[output_log_pos].data = byte;
1165 output_log[output_log_pos].status = status;
1166 output_log[output_log_pos].jiffies = jiffies;
1167 output_log_pos = (output_log_pos + 1) % OLOGSIZE;
1172 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
1179 /* gets the response from the fdc */
1180 static int result(void)
1185 for (i = 0; i < MAX_REPLIES; i++) {
1186 status = wait_til_ready();
1189 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA;
1190 if ((status & ~STATUS_BUSY) == STATUS_READY) {
1191 resultjiffies = jiffies;
1195 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY))
1196 reply_buffer[i] = fd_inb(FD_DATA);
1201 DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
1209 #define MORE_OUTPUT -2
1210 /* does the fdc need more output? */
1211 static int need_more_output(void)
1213 int status = wait_til_ready();
1218 if (is_ready_state(status))
1224 /* Set perpendicular mode as required, based on data rate, if supported.
1225 * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1227 static void perpendicular_mode(void)
1229 unsigned char perp_mode;
1231 if (raw_cmd->rate & 0x40) {
1232 switch (raw_cmd->rate & 3) {
1240 DPRINT("Invalid data rate for perpendicular mode!\n");
1244 * convenient way to return to
1245 * redo without too much hassle
1246 * (deep stack et al.)
1253 if (FDCS->perp_mode == perp_mode)
1255 if (FDCS->version >= FDC_82077_ORIG) {
1256 output_byte(FD_PERPENDICULAR);
1257 output_byte(perp_mode);
1258 FDCS->perp_mode = perp_mode;
1259 } else if (perp_mode) {
1260 DPRINT("perpendicular mode not supported by this FDC.\n");
1262 } /* perpendicular_mode */
1264 static int fifo_depth = 0xa;
1267 static int fdc_configure(void)
1270 output_byte(FD_CONFIGURE);
1271 if (need_more_output() != MORE_OUTPUT)
1274 output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf));
1275 output_byte(0); /* pre-compensation from track
1280 #define NOMINAL_DTR 500
1282 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1283 * head load time, and DMA disable flag to values needed by floppy.
1285 * The value "dtr" is the data transfer rate in Kbps. It is needed
1286 * to account for the data rate-based scaling done by the 82072 and 82077
1287 * FDC types. This parameter is ignored for other types of FDCs (i.e.
1290 * Note that changing the data transfer rate has a (probably deleterious)
1291 * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1292 * fdc_specify is called again after each data transfer rate
1295 * srt: 1000 to 16000 in microseconds
1296 * hut: 16 to 240 milliseconds
1297 * hlt: 2 to 254 milliseconds
1299 * These values are rounded up to the next highest available delay time.
1301 static void fdc_specify(void)
1303 unsigned char spec1;
1304 unsigned char spec2;
1308 unsigned long dtr = NOMINAL_DTR;
1309 unsigned long scale_dtr = NOMINAL_DTR;
1310 int hlt_max_code = 0x7f;
1311 int hut_max_code = 0xf;
1313 if (FDCS->need_configure && FDCS->version >= FDC_82072A) {
1315 FDCS->need_configure = 0;
1318 switch (raw_cmd->rate & 0x03) {
1324 if (FDCS->version >= FDC_82078) {
1325 /* chose the default rate table, not the one
1326 * where 1 = 2 Mbps */
1327 output_byte(FD_DRIVESPEC);
1328 if (need_more_output() == MORE_OUTPUT) {
1329 output_byte(UNIT(current_drive));
1339 if (FDCS->version >= FDC_82072) {
1341 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1342 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1345 /* Convert step rate from microseconds to milliseconds and 4 bits */
1346 srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR);
1353 hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR);
1356 else if (hlt > 0x7f)
1359 hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR);
1365 spec1 = (srt << 4) | hut;
1366 spec2 = (hlt << 1) | (use_virtual_dma & 1);
1368 /* If these parameters did not change, just return with success */
1369 if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) {
1370 /* Go ahead and set spec1 and spec2 */
1371 output_byte(FD_SPECIFY);
1372 output_byte(FDCS->spec1 = spec1);
1373 output_byte(FDCS->spec2 = spec2);
1377 /* Set the FDC's data transfer rate on behalf of the specified drive.
1378 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1379 * of the specify command (i.e. using the fdc_specify function).
1381 static int fdc_dtr(void)
1383 /* If data rate not already set to desired value, set it. */
1384 if ((raw_cmd->rate & 3) == FDCS->dtr)
1388 fd_outb(raw_cmd->rate & 3, FD_DCR);
1390 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1391 * need a stabilization period of several milliseconds to be
1392 * enforced after data rate changes before R/W operations.
1393 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1395 FDCS->dtr = raw_cmd->rate & 3;
1396 return fd_wait_for_completion(jiffies + 2UL * HZ / 100,
1397 (timeout_fn)floppy_ready);
1400 static void tell_sector(void)
1402 pr_cont(": track %d, head %d, sector %d, size %d",
1403 R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE);
1406 static void print_errors(void)
1409 if (ST0 & ST0_ECE) {
1410 pr_cont("Recalibrate failed!");
1411 } else if (ST2 & ST2_CRC) {
1412 pr_cont("data CRC error");
1414 } else if (ST1 & ST1_CRC) {
1415 pr_cont("CRC error");
1417 } else if ((ST1 & (ST1_MAM | ST1_ND)) ||
1420 pr_cont("sector not found");
1423 pr_cont("probe failed...");
1424 } else if (ST2 & ST2_WC) { /* seek error */
1425 pr_cont("wrong cylinder");
1426 } else if (ST2 & ST2_BC) { /* cylinder marked as bad */
1427 pr_cont("bad cylinder");
1429 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
1437 * OK, this error interpreting routine is called after a
1438 * DMA read/write has succeeded
1439 * or failed, so we check the results, and copy any buffers.
1440 * hhb: Added better error reporting.
1441 * ak: Made this into a separate routine.
1443 static int interpret_errors(void)
1448 DPRINT("-- FDC reply error\n");
1453 /* check IC to find cause of interrupt */
1454 switch (ST0 & ST0_INTR) {
1455 case 0x40: /* error occurred during command execution */
1457 return 0; /* occurs with pseudo-DMA */
1460 DPRINT("Drive is write protected\n");
1461 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
1464 } else if (ST1 & ST1_ND) {
1465 set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags);
1466 } else if (ST1 & ST1_OR) {
1467 if (DP->flags & FTD_MSG)
1468 DPRINT("Over/Underrun - retrying\n");
1470 } else if (*errors >= DP->max_errors.reporting) {
1473 if (ST2 & ST2_WC || ST2 & ST2_BC)
1474 /* wrong cylinder => recal */
1475 DRS->track = NEED_2_RECAL;
1477 case 0x80: /* invalid command given */
1478 DPRINT("Invalid FDC command given!\n");
1482 DPRINT("Abnormal termination caused by polling\n");
1485 default: /* (0) Normal command termination */
1491 * This routine is called when everything should be correctly set up
1492 * for the transfer (i.e. floppy motor is on, the correct floppy is
1493 * selected, and the head is sitting on the right track).
1495 static void setup_rw_floppy(void)
1501 unsigned long ready_date;
1502 timeout_fn function;
1504 flags = raw_cmd->flags;
1505 if (flags & (FD_RAW_READ | FD_RAW_WRITE))
1506 flags |= FD_RAW_INTR;
1508 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) {
1509 ready_date = DRS->spinup_date + DP->spinup;
1510 /* If spinup will take a long time, rerun scandrives
1511 * again just before spinup completion. Beware that
1512 * after scandrives, we must again wait for selection.
1514 if (time_after(ready_date, jiffies + DP->select_delay)) {
1515 ready_date -= DP->select_delay;
1516 function = (timeout_fn)floppy_start;
1518 function = (timeout_fn)setup_rw_floppy;
1520 /* wait until the floppy is spinning fast enough */
1521 if (fd_wait_for_completion(ready_date, function))
1524 dflags = DRS->flags;
1526 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE))
1529 if (flags & FD_RAW_INTR)
1530 do_floppy = main_command_interrupt;
1533 for (i = 0; i < raw_cmd->cmd_count; i++)
1534 r |= output_byte(raw_cmd->cmd[i]);
1536 debugt(__func__, "rw_command");
1544 if (!(flags & FD_RAW_INTR)) {
1547 } else if (flags & FD_RAW_NEED_DISK)
1551 static int blind_seek;
1554 * This is the routine called after every seek (or recalibrate) interrupt
1555 * from the floppy controller.
1557 static void seek_interrupt(void)
1559 debugt(__func__, "");
1560 if (inr != 2 || (ST0 & 0xF8) != 0x20) {
1561 DPRINT("seek failed\n");
1562 DRS->track = NEED_2_RECAL;
1567 if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) {
1568 debug_dcl(DP->flags,
1569 "clearing NEWCHANGE flag because of effective seek\n");
1570 debug_dcl(DP->flags, "jiffies=%lu\n", jiffies);
1571 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
1572 /* effective seek */
1573 DRS->select_date = jiffies;
1579 static void check_wp(void)
1581 if (test_bit(FD_VERIFY_BIT, &DRS->flags)) {
1582 /* check write protection */
1583 output_byte(FD_GETSTATUS);
1584 output_byte(UNIT(current_drive));
1585 if (result() != 1) {
1589 clear_bit(FD_VERIFY_BIT, &DRS->flags);
1590 clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags);
1591 debug_dcl(DP->flags,
1592 "checking whether disk is write protected\n");
1593 debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40);
1595 set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
1597 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
1601 static void seek_floppy(void)
1607 debug_dcl(DP->flags, "calling disk change from %s\n", __func__);
1609 if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) &&
1610 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) {
1611 /* the media changed flag should be cleared after the seek.
1612 * If it isn't, this means that there is really no disk in
1615 set_bit(FD_DISK_CHANGED_BIT, &DRS->flags);
1620 if (DRS->track <= NEED_1_RECAL) {
1621 recalibrate_floppy();
1623 } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) &&
1624 (raw_cmd->flags & FD_RAW_NEED_DISK) &&
1625 (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) {
1626 /* we seek to clear the media-changed condition. Does anybody
1627 * know a more elegant way, which works on all drives? */
1629 track = raw_cmd->track - 1;
1631 if (DP->flags & FD_SILENT_DCL_CLEAR) {
1632 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0);
1634 raw_cmd->flags |= FD_RAW_NEED_SEEK;
1640 if (raw_cmd->track != DRS->track &&
1641 (raw_cmd->flags & FD_RAW_NEED_SEEK))
1642 track = raw_cmd->track;
1649 do_floppy = seek_interrupt;
1650 output_byte(FD_SEEK);
1651 output_byte(UNIT(current_drive));
1652 if (output_byte(track) < 0) {
1656 debugt(__func__, "");
1659 static void recal_interrupt(void)
1661 debugt(__func__, "");
1664 else if (ST0 & ST0_ECE) {
1665 switch (DRS->track) {
1667 debugt(__func__, "need 1 recal");
1668 /* after a second recalibrate, we still haven't
1669 * reached track 0. Probably no drive. Raise an
1670 * error, as failing immediately might upset
1671 * computers possessed by the Devil :-) */
1676 debugt(__func__, "need 2 recal");
1677 /* If we already did a recalibrate,
1678 * and we are not at track 0, this
1679 * means we have moved. (The only way
1680 * not to move at recalibration is to
1681 * be already at track 0.) Clear the
1682 * new change flag */
1683 debug_dcl(DP->flags,
1684 "clearing NEWCHANGE flag because of second recalibrate\n");
1686 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
1687 DRS->select_date = jiffies;
1690 debugt(__func__, "default");
1691 /* Recalibrate moves the head by at
1692 * most 80 steps. If after one
1693 * recalibrate we don't have reached
1694 * track 0, this might mean that we
1695 * started beyond track 80. Try
1697 DRS->track = NEED_1_RECAL;
1705 static void print_result(char *message, int inr)
1709 DPRINT("%s ", message);
1711 for (i = 0; i < inr; i++)
1712 pr_cont("repl[%d]=%x ", i, reply_buffer[i]);
1716 /* interrupt handler. Note that this can be called externally on the Sparc */
1717 irqreturn_t floppy_interrupt(int irq, void *dev_id)
1721 void (*handler)(void) = do_floppy;
1723 lasthandler = handler;
1724 interruptjiffies = jiffies;
1726 f = claim_dma_lock();
1728 release_dma_lock(f);
1730 floppy_enable_hlt();
1732 if (fdc >= N_FDC || FDCS->address == -1) {
1733 /* we don't even know which FDC is the culprit */
1734 pr_info("DOR0=%x\n", fdc_state[0].dor);
1735 pr_info("floppy interrupt on bizarre fdc %d\n", fdc);
1736 pr_info("handler=%pf\n", handler);
1737 is_alive(__func__, "bizarre fdc");
1742 /* We have to clear the reset flag here, because apparently on boxes
1743 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
1744 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
1745 * emission of the SENSEI's.
1746 * It is OK to emit floppy commands because we are in an interrupt
1747 * handler here, and thus we have to fear no interference of other
1751 do_print = !handler && print_unex && initialized;
1755 print_result("unexpected interrupt", inr);
1759 output_byte(FD_SENSEI);
1762 print_result("sensei", inr);
1764 } while ((ST0 & 0x83) != UNIT(current_drive) &&
1765 inr == 2 && max_sensei);
1771 schedule_bh(handler);
1772 is_alive(__func__, "normal interrupt end");
1774 /* FIXME! Was it really for us? */
1778 static void recalibrate_floppy(void)
1780 debugt(__func__, "");
1781 do_floppy = recal_interrupt;
1782 output_byte(FD_RECALIBRATE);
1783 if (output_byte(UNIT(current_drive)) < 0)
1788 * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1790 static void reset_interrupt(void)
1792 debugt(__func__, "");
1793 result(); /* get the status ready for set_fdc */
1795 pr_info("reset set in interrupt, calling %pf\n", cont->error);
1796 cont->error(); /* a reset just after a reset. BAD! */
1802 * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1803 * or by setting the self clearing bit 7 of STATUS (newer FDCs)
1805 static void reset_fdc(void)
1807 unsigned long flags;
1809 do_floppy = reset_interrupt;
1813 /* Pseudo-DMA may intercept 'reset finished' interrupt. */
1814 /* Irrelevant for systems with true DMA (i386). */
1816 flags = claim_dma_lock();
1818 release_dma_lock(flags);
1820 if (FDCS->version >= FDC_82072A)
1821 fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS);
1823 fd_outb(FDCS->dor & ~0x04, FD_DOR);
1824 udelay(FD_RESET_DELAY);
1825 fd_outb(FDCS->dor, FD_DOR);
1829 static void show_floppy(void)
1834 pr_info("floppy driver state\n");
1835 pr_info("-------------------\n");
1836 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%pf\n",
1837 jiffies, interruptjiffies, jiffies - interruptjiffies,
1840 pr_info("timeout_message=%s\n", timeout_message);
1841 pr_info("last output bytes:\n");
1842 for (i = 0; i < OLOGSIZE; i++)
1843 pr_info("%2x %2x %lu\n",
1844 output_log[(i + output_log_pos) % OLOGSIZE].data,
1845 output_log[(i + output_log_pos) % OLOGSIZE].status,
1846 output_log[(i + output_log_pos) % OLOGSIZE].jiffies);
1847 pr_info("last result at %lu\n", resultjiffies);
1848 pr_info("last redo_fd_request at %lu\n", lastredo);
1849 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1,
1850 reply_buffer, resultsize, true);
1852 pr_info("status=%x\n", fd_inb(FD_STATUS));
1853 pr_info("fdc_busy=%lu\n", fdc_busy);
1855 pr_info("do_floppy=%pf\n", do_floppy);
1856 if (work_pending(&floppy_work))
1857 pr_info("floppy_work.func=%pf\n", floppy_work.func);
1858 if (timer_pending(&fd_timer))
1859 pr_info("fd_timer.function=%pf\n", fd_timer.function);
1860 if (timer_pending(&fd_timeout)) {
1861 pr_info("timer_function=%pf\n", fd_timeout.function);
1862 pr_info("expires=%lu\n", fd_timeout.expires - jiffies);
1863 pr_info("now=%lu\n", jiffies);
1865 pr_info("cont=%p\n", cont);
1866 pr_info("current_req=%p\n", current_req);
1867 pr_info("command_status=%d\n", command_status);
1871 static void floppy_shutdown(unsigned long data)
1873 unsigned long flags;
1879 floppy_enable_hlt();
1881 flags = claim_dma_lock();
1883 release_dma_lock(flags);
1885 /* avoid dma going to a random drive after shutdown */
1888 DPRINT("floppy timeout called\n");
1892 cont->redo(); /* this will recall reset when needed */
1894 pr_info("no cont in shutdown!\n");
1895 process_fd_request();
1897 is_alive(__func__, "");
1900 /* start motor, check media-changed condition and write protection */
1901 static int start_motor(void (*function)(void))
1907 data = UNIT(current_drive);
1908 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) {
1909 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) {
1911 /* no read since this drive is running */
1912 DRS->first_read_date = 0;
1913 /* note motor start time if motor is not yet running */
1914 DRS->spinup_date = jiffies;
1915 data |= (0x10 << UNIT(current_drive));
1917 } else if (FDCS->dor & (0x10 << UNIT(current_drive)))
1918 mask &= ~(0x10 << UNIT(current_drive));
1920 /* starts motor and selects floppy */
1921 del_timer(motor_off_timer + current_drive);
1922 set_dor(fdc, mask, data);
1924 /* wait_for_completion also schedules reset if needed. */
1925 return fd_wait_for_completion(DRS->select_date + DP->select_delay,
1926 (timeout_fn)function);
1929 static void floppy_ready(void)
1935 if (start_motor(floppy_ready))
1940 debug_dcl(DP->flags, "calling disk change from floppy_ready\n");
1941 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
1942 disk_change(current_drive) && !DP->select_delay)
1943 twaddle(); /* this clears the dcl on certain
1944 * drive/controller combinations */
1946 #ifdef fd_chose_dma_mode
1947 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) {
1948 unsigned long flags = claim_dma_lock();
1949 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length);
1950 release_dma_lock(flags);
1954 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) {
1955 perpendicular_mode();
1956 fdc_specify(); /* must be done here because of hut, hlt ... */
1959 if ((raw_cmd->flags & FD_RAW_READ) ||
1960 (raw_cmd->flags & FD_RAW_WRITE))
1966 static void floppy_start(void)
1968 reschedule_timeout(current_reqD, "floppy start");
1971 debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n");
1972 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
1977 * ========================================================================
1978 * here ends the bottom half. Exported routines are:
1979 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
1980 * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
1981 * Initialization also uses output_byte, result, set_dor, floppy_interrupt
1983 * ========================================================================
1986 * General purpose continuations.
1987 * ==============================
1990 static void do_wakeup(void)
1992 reschedule_timeout(MAXTIMEOUT, "do wakeup");
1994 command_status += 2;
1995 wake_up(&command_done);
1998 static struct cont_t wakeup_cont = {
2002 .done = (done_f)empty
2005 static struct cont_t intr_cont = {
2007 .redo = process_fd_request,
2009 .done = (done_f)empty
2012 static int wait_til_done(void (*handler)(void), bool interruptible)
2016 schedule_bh(handler);
2018 if (command_status < 2 && NO_SIGNAL) {
2019 DECLARE_WAITQUEUE(wait, current);
2021 add_wait_queue(&command_done, &wait);
2023 set_current_state(interruptible ?
2024 TASK_INTERRUPTIBLE :
2025 TASK_UNINTERRUPTIBLE);
2027 if (command_status >= 2 || !NO_SIGNAL)
2030 is_alive(__func__, "");
2034 set_current_state(TASK_RUNNING);
2035 remove_wait_queue(&command_done, &wait);
2038 if (command_status < 2) {
2046 command_status = FD_COMMAND_ERROR;
2047 if (command_status == FD_COMMAND_OKAY)
2051 command_status = FD_COMMAND_NONE;
2055 static void generic_done(int result)
2057 command_status = result;
2058 cont = &wakeup_cont;
2061 static void generic_success(void)
2066 static void generic_failure(void)
2071 static void success_and_wakeup(void)
2078 * formatting and rw support.
2079 * ==========================
2082 static int next_valid_format(void)
2086 probed_format = DRS->probed_format;
2088 if (probed_format >= 8 || !DP->autodetect[probed_format]) {
2089 DRS->probed_format = 0;
2092 if (floppy_type[DP->autodetect[probed_format]].sect) {
2093 DRS->probed_format = probed_format;
2100 static void bad_flp_intr(void)
2105 DRS->probed_format++;
2106 if (!next_valid_format())
2109 err_count = ++(*errors);
2110 INFBOUND(DRWE->badness, err_count);
2111 if (err_count > DP->max_errors.abort)
2113 if (err_count > DP->max_errors.reset)
2115 else if (err_count > DP->max_errors.recal)
2116 DRS->track = NEED_2_RECAL;
2119 static void set_floppy(int drive)
2121 int type = ITYPE(UDRS->fd_device);
2124 _floppy = floppy_type + type;
2126 _floppy = current_type[drive];
2130 * formatting support.
2131 * ===================
2133 static void format_interrupt(void)
2135 switch (interpret_errors()) {
2146 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1))
2147 #define CT(x) ((x) | 0xc0)
2149 static void setup_format_params(int track)
2157 unsigned char track, head, sect, size;
2158 } *here = (struct fparm *)floppy_track_buffer;
2160 raw_cmd = &default_raw_cmd;
2161 raw_cmd->track = track;
2163 raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
2164 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK);
2165 raw_cmd->rate = _floppy->rate & 0x43;
2166 raw_cmd->cmd_count = NR_F;
2167 COMMAND = FM_MODE(_floppy, FD_FORMAT);
2168 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head);
2169 F_SIZECODE = FD_SIZECODE(_floppy);
2170 F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE;
2171 F_GAP = _floppy->fmt_gap;
2172 F_FILL = FD_FILL_BYTE;
2174 raw_cmd->kernel_data = floppy_track_buffer;
2175 raw_cmd->length = 4 * F_SECT_PER_TRACK;
2177 /* allow for about 30ms for data transport per track */
2178 head_shift = (F_SECT_PER_TRACK + 5) / 6;
2180 /* a ``cylinder'' is two tracks plus a little stepping time */
2181 track_shift = 2 * head_shift + 3;
2183 /* position of logical sector 1 on this track */
2184 n = (track_shift * format_req.track + head_shift * format_req.head)
2187 /* determine interleave */
2189 if (_floppy->fmt_gap < 0x22)
2192 /* initialize field */
2193 for (count = 0; count < F_SECT_PER_TRACK; ++count) {
2194 here[count].track = format_req.track;
2195 here[count].head = format_req.head;
2196 here[count].sect = 0;
2197 here[count].size = F_SIZECODE;
2199 /* place logical sectors */
2200 for (count = 1; count <= F_SECT_PER_TRACK; ++count) {
2201 here[n].sect = count;
2202 n = (n + il) % F_SECT_PER_TRACK;
2203 if (here[n].sect) { /* sector busy, find next free sector */
2205 if (n >= F_SECT_PER_TRACK) {
2206 n -= F_SECT_PER_TRACK;
2207 while (here[n].sect)
2212 if (_floppy->stretch & FD_SECTBASEMASK) {
2213 for (count = 0; count < F_SECT_PER_TRACK; count++)
2214 here[count].sect += FD_SECTBASE(_floppy) - 1;
2218 static void redo_format(void)
2221 setup_format_params(format_req.track << STRETCH(_floppy));
2223 debugt(__func__, "queue format request");
2226 static struct cont_t format_cont = {
2227 .interrupt = format_interrupt,
2228 .redo = redo_format,
2229 .error = bad_flp_intr,
2230 .done = generic_done
2233 static int do_format(int drive, struct format_descr *tmp_format_req)
2237 if (lock_fdc(drive, true))
2242 _floppy->track > DP->tracks ||
2243 tmp_format_req->track >= _floppy->track ||
2244 tmp_format_req->head >= _floppy->head ||
2245 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
2246 !_floppy->fmt_gap) {
2247 process_fd_request();
2250 format_req = *tmp_format_req;
2252 cont = &format_cont;
2253 errors = &format_errors;
2254 ret = wait_til_done(redo_format, true);
2257 process_fd_request();
2262 * Buffer read/write and support
2263 * =============================
2266 static void floppy_end_request(struct request *req, int error)
2268 unsigned int nr_sectors = current_count_sectors;
2269 unsigned int drive = (unsigned long)req->rq_disk->private_data;
2271 /* current_count_sectors can be zero if transfer failed */
2273 nr_sectors = blk_rq_cur_sectors(req);
2274 if (__blk_end_request(req, error, nr_sectors << 9))
2277 /* We're done with the request */
2282 /* new request_done. Can handle physical sectors which are smaller than a
2284 static void request_done(int uptodate)
2286 struct request_queue *q = floppy_queue;
2287 struct request *req = current_req;
2288 unsigned long flags;
2290 char msg[sizeof("request done ") + sizeof(int) * 3];
2293 snprintf(msg, sizeof(msg), "request done %d", uptodate);
2294 reschedule_timeout(MAXTIMEOUT, msg);
2297 pr_info("floppy.c: no request in request_done\n");
2302 /* maintain values for invalidation on geometry
2304 block = current_count_sectors + blk_rq_pos(req);
2305 INFBOUND(DRS->maxblock, block);
2306 if (block > _floppy->sect)
2309 /* unlock chained buffers */
2310 spin_lock_irqsave(q->queue_lock, flags);
2311 floppy_end_request(req, 0);
2312 spin_unlock_irqrestore(q->queue_lock, flags);
2314 if (rq_data_dir(req) == WRITE) {
2315 /* record write error information */
2316 DRWE->write_errors++;
2317 if (DRWE->write_errors == 1) {
2318 DRWE->first_error_sector = blk_rq_pos(req);
2319 DRWE->first_error_generation = DRS->generation;
2321 DRWE->last_error_sector = blk_rq_pos(req);
2322 DRWE->last_error_generation = DRS->generation;
2324 spin_lock_irqsave(q->queue_lock, flags);
2325 floppy_end_request(req, -EIO);
2326 spin_unlock_irqrestore(q->queue_lock, flags);
2330 /* Interrupt handler evaluating the result of the r/w operation */
2331 static void rw_interrupt(void)
2339 /* some Toshiba floppy controllers occasionnally seem to
2340 * return bogus interrupts after read/write operations, which
2341 * can be recognized by a bad head number (>= 2) */
2345 if (!DRS->first_read_date)
2346 DRS->first_read_date = jiffies;
2349 ssize = DIV_ROUND_UP(1 << SIZECODE, 4);
2361 nr_sectors = (((R_TRACK - TRACK) * heads +
2362 R_HEAD - HEAD) * SECT_PER_TRACK +
2363 R_SECTOR - SECTOR + eoc) << SIZECODE >> 2;
2365 if (nr_sectors / ssize >
2366 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) {
2367 DPRINT("long rw: %x instead of %lx\n",
2368 nr_sectors, current_count_sectors);
2369 pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR);
2370 pr_info("rh=%d h=%d\n", R_HEAD, HEAD);
2371 pr_info("rt=%d t=%d\n", R_TRACK, TRACK);
2372 pr_info("heads=%d eoc=%d\n", heads, eoc);
2373 pr_info("spt=%d st=%d ss=%d\n",
2374 SECT_PER_TRACK, fsector_t, ssize);
2375 pr_info("in_sector_offset=%d\n", in_sector_offset);
2378 nr_sectors -= in_sector_offset;
2379 INFBOUND(nr_sectors, 0);
2380 SUPBOUND(current_count_sectors, nr_sectors);
2382 switch (interpret_errors()) {
2387 if (!current_count_sectors) {
2394 if (!current_count_sectors) {
2398 current_type[current_drive] = _floppy;
2399 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2404 if (DP->flags & FTD_MSG)
2405 DPRINT("Auto-detected floppy type %s in fd%d\n",
2406 _floppy->name, current_drive);
2407 current_type[current_drive] = _floppy;
2408 floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
2412 if (CT(COMMAND) != FD_READ ||
2413 raw_cmd->kernel_data == current_req->buffer) {
2414 /* transfer directly from buffer */
2416 } else if (CT(COMMAND) == FD_READ) {
2417 buffer_track = raw_cmd->track;
2418 buffer_drive = current_drive;
2419 INFBOUND(buffer_max, nr_sectors + fsector_t);
2424 /* Compute maximal contiguous buffer size. */
2425 static int buffer_chain_size(void)
2429 struct req_iterator iter;
2432 base = bio_data(current_req->bio);
2435 rq_for_each_segment(bv, current_req, iter) {
2436 if (page_address(bv->bv_page) + bv->bv_offset != base + size)
2445 /* Compute the maximal transfer size */
2446 static int transfer_size(int ssize, int max_sector, int max_size)
2448 SUPBOUND(max_sector, fsector_t + max_size);
2451 max_sector -= (max_sector % _floppy->sect) % ssize;
2453 /* transfer size, beginning not aligned */
2454 current_count_sectors = max_sector - fsector_t;
2460 * Move data from/to the track buffer to/from the buffer cache.
2462 static void copy_buffer(int ssize, int max_sector, int max_sector_2)
2464 int remaining; /* number of transferred 512-byte sectors */
2469 struct req_iterator iter;
2471 max_sector = transfer_size(ssize,
2472 min(max_sector, max_sector_2),
2473 blk_rq_sectors(current_req));
2475 if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
2476 buffer_max > fsector_t + blk_rq_sectors(current_req))
2477 current_count_sectors = min_t(int, buffer_max - fsector_t,
2478 blk_rq_sectors(current_req));
2480 remaining = current_count_sectors << 9;
2481 if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) {
2482 DPRINT("in copy buffer\n");
2483 pr_info("current_count_sectors=%ld\n", current_count_sectors);
2484 pr_info("remaining=%d\n", remaining >> 9);
2485 pr_info("current_req->nr_sectors=%u\n",
2486 blk_rq_sectors(current_req));
2487 pr_info("current_req->current_nr_sectors=%u\n",
2488 blk_rq_cur_sectors(current_req));
2489 pr_info("max_sector=%d\n", max_sector);
2490 pr_info("ssize=%d\n", ssize);
2493 buffer_max = max(max_sector, buffer_max);
2495 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
2497 size = blk_rq_cur_bytes(current_req);
2499 rq_for_each_segment(bv, current_req, iter) {
2504 SUPBOUND(size, remaining);
2506 buffer = page_address(bv->bv_page) + bv->bv_offset;
2507 if (dma_buffer + size >
2508 floppy_track_buffer + (max_buffer_sectors << 10) ||
2509 dma_buffer < floppy_track_buffer) {
2510 DPRINT("buffer overrun in copy buffer %d\n",
2511 (int)((floppy_track_buffer - dma_buffer) >> 9));
2512 pr_info("fsector_t=%d buffer_min=%d\n",
2513 fsector_t, buffer_min);
2514 pr_info("current_count_sectors=%ld\n",
2515 current_count_sectors);
2516 if (CT(COMMAND) == FD_READ)
2518 if (CT(COMMAND) == FD_WRITE)
2522 if (((unsigned long)buffer) % 512)
2523 DPRINT("%p buffer not aligned\n", buffer);
2525 if (CT(COMMAND) == FD_READ)
2526 memcpy(buffer, dma_buffer, size);
2528 memcpy(dma_buffer, buffer, size);
2535 max_sector -= remaining >> 9;
2536 DPRINT("weirdness: remaining %d\n", remaining >> 9);
2540 /* work around a bug in pseudo DMA
2541 * (on some FDCs) pseudo DMA does not stop when the CPU stops
2542 * sending data. Hence we need a different way to signal the
2543 * transfer length: We use SECT_PER_TRACK. Unfortunately, this
2544 * does not work with MT, hence we can only transfer one head at
2547 static void virtualdmabug_workaround(void)
2552 if (CT(COMMAND) == FD_WRITE) {
2553 COMMAND &= ~0x80; /* switch off multiple track mode */
2555 hard_sectors = raw_cmd->length >> (7 + SIZECODE);
2556 end_sector = SECTOR + hard_sectors - 1;
2557 if (end_sector > SECT_PER_TRACK) {
2558 pr_info("too many sectors %d > %d\n",
2559 end_sector, SECT_PER_TRACK);
2562 SECT_PER_TRACK = end_sector;
2563 /* make sure SECT_PER_TRACK
2564 * points to end of transfer */
2569 * Formulate a read/write request.
2570 * this routine decides where to load the data (directly to buffer, or to
2571 * tmp floppy area), how much data to load (the size of the buffer, the whole
2572 * track, or a single sector)
2573 * All floppy_track_buffer handling goes in here. If we ever add track buffer
2574 * allocation on the fly, it should be done here. No other part should need
2578 static int make_raw_rw_request(void)
2580 int aligned_sector_t;
2586 if (max_buffer_sectors == 0) {
2587 pr_info("VFS: Block I/O scheduled on unopened device\n");
2591 set_fdc((long)current_req->rq_disk->private_data);
2593 raw_cmd = &default_raw_cmd;
2594 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK |
2596 raw_cmd->cmd_count = NR_RW;
2597 if (rq_data_dir(current_req) == READ) {
2598 raw_cmd->flags |= FD_RAW_READ;
2599 COMMAND = FM_MODE(_floppy, FD_READ);
2600 } else if (rq_data_dir(current_req) == WRITE) {
2601 raw_cmd->flags |= FD_RAW_WRITE;
2602 COMMAND = FM_MODE(_floppy, FD_WRITE);
2604 DPRINT("%s: unknown command\n", __func__);
2608 max_sector = _floppy->sect * _floppy->head;
2610 TRACK = (int)blk_rq_pos(current_req) / max_sector;
2611 fsector_t = (int)blk_rq_pos(current_req) % max_sector;
2612 if (_floppy->track && TRACK >= _floppy->track) {
2613 if (blk_rq_cur_sectors(current_req) & 1) {
2614 current_count_sectors = 1;
2619 HEAD = fsector_t / _floppy->sect;
2621 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) ||
2622 test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) &&
2623 fsector_t < _floppy->sect)
2624 max_sector = _floppy->sect;
2626 /* 2M disks have phantom sectors on the first track */
2627 if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) {
2628 max_sector = 2 * _floppy->sect / 3;
2629 if (fsector_t >= max_sector) {
2630 current_count_sectors =
2631 min_t(int, _floppy->sect - fsector_t,
2632 blk_rq_sectors(current_req));
2637 SIZECODE = FD_SIZECODE(_floppy);
2638 raw_cmd->rate = _floppy->rate & 0x43;
2639 if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2)
2646 raw_cmd->track = TRACK << STRETCH(_floppy);
2647 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD);
2649 ssize = DIV_ROUND_UP(1 << SIZECODE, 4);
2650 SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
2651 SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) +
2652 FD_SECTBASE(_floppy);
2654 /* tracksize describes the size which can be filled up with sectors
2657 tracksize = _floppy->sect - _floppy->sect % ssize;
2658 if (tracksize < _floppy->sect) {
2660 if (tracksize <= fsector_t % _floppy->sect)
2663 /* if we are beyond tracksize, fill up using smaller sectors */
2664 while (tracksize <= fsector_t % _floppy->sect) {
2665 while (tracksize + ssize > _floppy->sect) {
2673 max_sector = HEAD * _floppy->sect + tracksize;
2674 } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) {
2675 max_sector = _floppy->sect;
2676 } else if (!HEAD && CT(COMMAND) == FD_WRITE) {
2677 /* for virtual DMA bug workaround */
2678 max_sector = _floppy->sect;
2681 in_sector_offset = (fsector_t % _floppy->sect) % ssize;
2682 aligned_sector_t = fsector_t - in_sector_offset;
2683 max_size = blk_rq_sectors(current_req);
2684 if ((raw_cmd->track == buffer_track) &&
2685 (current_drive == buffer_drive) &&
2686 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
2687 /* data already in track buffer */
2688 if (CT(COMMAND) == FD_READ) {
2689 copy_buffer(1, max_sector, buffer_max);
2692 } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) {
2693 if (CT(COMMAND) == FD_WRITE) {
2694 unsigned int sectors;
2696 sectors = fsector_t + blk_rq_sectors(current_req);
2697 if (sectors > ssize && sectors < ssize + ssize)
2698 max_size = ssize + ssize;
2702 raw_cmd->flags &= ~FD_RAW_WRITE;
2703 raw_cmd->flags |= FD_RAW_READ;
2704 COMMAND = FM_MODE(_floppy, FD_READ);
2705 } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) {
2706 unsigned long dma_limit;
2707 int direct, indirect;
2710 transfer_size(ssize, max_sector,
2711 max_buffer_sectors * 2) - fsector_t;
2714 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2715 * on a 64 bit machine!
2717 max_size = buffer_chain_size();
2718 dma_limit = (MAX_DMA_ADDRESS -
2719 ((unsigned long)current_req->buffer)) >> 9;
2720 if ((unsigned long)max_size > dma_limit)
2721 max_size = dma_limit;
2722 /* 64 kb boundaries */
2723 if (CROSS_64KB(current_req->buffer, max_size << 9))
2725 ((unsigned long)current_req->buffer) %
2727 direct = transfer_size(ssize, max_sector, max_size) - fsector_t;
2729 * We try to read tracks, but if we get too many errors, we
2730 * go back to reading just one sector at a time.
2732 * This means we should be able to read a sector even if there
2733 * are other bad sectors on this track.
2736 (indirect * 2 > direct * 3 &&
2737 *errors < DP->max_errors.read_track &&
2739 (DP->read_track & (1 << DRS->probed_format)))))) {
2740 max_size = blk_rq_sectors(current_req);
2742 raw_cmd->kernel_data = current_req->buffer;
2743 raw_cmd->length = current_count_sectors << 9;
2744 if (raw_cmd->length == 0) {
2745 DPRINT("%s: zero dma transfer attempted\n", __func__);
2746 DPRINT("indirect=%d direct=%d fsector_t=%d\n",
2747 indirect, direct, fsector_t);
2750 virtualdmabug_workaround();
2755 if (CT(COMMAND) == FD_READ)
2756 max_size = max_sector; /* unbounded */
2758 /* claim buffer track if needed */
2759 if (buffer_track != raw_cmd->track || /* bad track */
2760 buffer_drive != current_drive || /* bad drive */
2761 fsector_t > buffer_max ||
2762 fsector_t < buffer_min ||
2763 ((CT(COMMAND) == FD_READ ||
2764 (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) &&
2765 max_sector > 2 * max_buffer_sectors + buffer_min &&
2766 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) {
2767 /* not enough space */
2769 buffer_drive = current_drive;
2770 buffer_max = buffer_min = aligned_sector_t;
2772 raw_cmd->kernel_data = floppy_track_buffer +
2773 ((aligned_sector_t - buffer_min) << 9);
2775 if (CT(COMMAND) == FD_WRITE) {
2776 /* copy write buffer to track buffer.
2777 * if we get here, we know that the write
2778 * is either aligned or the data already in the buffer
2779 * (buffer will be overwritten) */
2780 if (in_sector_offset && buffer_track == -1)
2781 DPRINT("internal error offset !=0 on write\n");
2782 buffer_track = raw_cmd->track;
2783 buffer_drive = current_drive;
2784 copy_buffer(ssize, max_sector,
2785 2 * max_buffer_sectors + buffer_min);
2787 transfer_size(ssize, max_sector,
2788 2 * max_buffer_sectors + buffer_min -
2791 /* round up current_count_sectors to get dma xfer size */
2792 raw_cmd->length = in_sector_offset + current_count_sectors;
2793 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1;
2794 raw_cmd->length <<= 9;
2795 if ((raw_cmd->length < current_count_sectors << 9) ||
2796 (raw_cmd->kernel_data != current_req->buffer &&
2797 CT(COMMAND) == FD_WRITE &&
2798 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
2799 aligned_sector_t < buffer_min)) ||
2800 raw_cmd->length % (128 << SIZECODE) ||
2801 raw_cmd->length <= 0 || current_count_sectors <= 0) {
2802 DPRINT("fractionary current count b=%lx s=%lx\n",
2803 raw_cmd->length, current_count_sectors);
2804 if (raw_cmd->kernel_data != current_req->buffer)
2805 pr_info("addr=%d, length=%ld\n",
2806 (int)((raw_cmd->kernel_data -
2807 floppy_track_buffer) >> 9),
2808 current_count_sectors);
2809 pr_info("st=%d ast=%d mse=%d msi=%d\n",
2810 fsector_t, aligned_sector_t, max_sector, max_size);
2811 pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE);
2812 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2813 COMMAND, SECTOR, HEAD, TRACK);
2814 pr_info("buffer drive=%d\n", buffer_drive);
2815 pr_info("buffer track=%d\n", buffer_track);
2816 pr_info("buffer_min=%d\n", buffer_min);
2817 pr_info("buffer_max=%d\n", buffer_max);
2821 if (raw_cmd->kernel_data != current_req->buffer) {
2822 if (raw_cmd->kernel_data < floppy_track_buffer ||
2823 current_count_sectors < 0 ||
2824 raw_cmd->length < 0 ||
2825 raw_cmd->kernel_data + raw_cmd->length >
2826 floppy_track_buffer + (max_buffer_sectors << 10)) {
2827 DPRINT("buffer overrun in schedule dma\n");
2828 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n",
2829 fsector_t, buffer_min, raw_cmd->length >> 9);
2830 pr_info("current_count_sectors=%ld\n",
2831 current_count_sectors);
2832 if (CT(COMMAND) == FD_READ)
2834 if (CT(COMMAND) == FD_WRITE)
2838 } else if (raw_cmd->length > blk_rq_bytes(current_req) ||
2839 current_count_sectors > blk_rq_sectors(current_req)) {
2840 DPRINT("buffer overrun in direct transfer\n");
2842 } else if (raw_cmd->length < current_count_sectors << 9) {
2843 DPRINT("more sectors than bytes\n");
2844 pr_info("bytes=%ld\n", raw_cmd->length >> 9);
2845 pr_info("sectors=%ld\n", current_count_sectors);
2847 if (raw_cmd->length == 0) {
2848 DPRINT("zero dma transfer attempted from make_raw_request\n");
2852 virtualdmabug_workaround();
2856 static void redo_fd_request(void)
2862 if (current_drive < N_DRIVE)
2863 floppy_off(current_drive);
2867 struct request *req;
2869 spin_lock_irq(floppy_queue->queue_lock);
2870 req = blk_fetch_request(floppy_queue);
2871 spin_unlock_irq(floppy_queue->queue_lock);
2879 drive = (long)current_req->rq_disk->private_data;
2881 reschedule_timeout(current_reqD, "redo fd request");
2884 raw_cmd = &default_raw_cmd;
2886 if (start_motor(redo_fd_request))
2889 disk_change(current_drive);
2890 if (test_bit(current_drive, &fake_change) ||
2891 test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) {
2892 DPRINT("disk absent or changed during operation\n");
2896 if (!_floppy) { /* Autodetection */
2898 DRS->probed_format = 0;
2899 if (next_valid_format()) {
2900 DPRINT("no autodetectable formats\n");
2907 _floppy = floppy_type + DP->autodetect[DRS->probed_format];
2910 errors = &(current_req->errors);
2911 tmp = make_raw_rw_request();
2917 if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags))
2919 schedule_bh(floppy_start);
2920 debugt(__func__, "queue fd request");
2924 static struct cont_t rw_cont = {
2925 .interrupt = rw_interrupt,
2926 .redo = redo_fd_request,
2927 .error = bad_flp_intr,
2928 .done = request_done
2931 static void process_fd_request(void)
2934 schedule_bh(redo_fd_request);
2937 static void do_fd_request(struct request_queue *q)
2939 if (max_buffer_sectors == 0) {
2940 pr_info("VFS: %s called on non-open device\n", __func__);
2944 if (atomic_read(&usage_count) == 0) {
2945 pr_info("warning: usage count=0, current_req=%p exiting\n",
2947 pr_info("sect=%ld type=%x flags=%x\n",
2948 (long)blk_rq_pos(current_req), current_req->cmd_type,
2949 current_req->cmd_flags);
2952 if (test_bit(0, &fdc_busy)) {
2953 /* fdc busy, this new request will be treated when the
2954 current one is done */
2955 is_alive(__func__, "old request running");
2958 lock_fdc(MAXTIMEOUT, false);
2959 process_fd_request();
2960 is_alive(__func__, "");
2963 static struct cont_t poll_cont = {
2964 .interrupt = success_and_wakeup,
2965 .redo = floppy_ready,
2966 .error = generic_failure,
2967 .done = generic_done
2970 static int poll_drive(bool interruptible, int flag)
2972 /* no auto-sense, just clear dcl */
2973 raw_cmd = &default_raw_cmd;
2974 raw_cmd->flags = flag;
2976 raw_cmd->cmd_count = 0;
2978 debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n");
2979 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
2981 return wait_til_done(floppy_ready, interruptible);
2985 * User triggered reset
2986 * ====================
2989 static void reset_intr(void)
2991 pr_info("weird, reset interrupt called\n");
2994 static struct cont_t reset_cont = {
2995 .interrupt = reset_intr,
2996 .redo = success_and_wakeup,
2997 .error = generic_failure,
2998 .done = generic_done
3001 static int user_reset_fdc(int drive, int arg, bool interruptible)
3005 if (lock_fdc(drive, interruptible))
3008 if (arg == FD_RESET_ALWAYS)
3012 ret = wait_til_done(reset_fdc, interruptible);
3016 process_fd_request();
3021 * Misc Ioctl's and support
3022 * ========================
3024 static inline int fd_copyout(void __user *param, const void *address,
3027 return copy_to_user(param, address, size) ? -EFAULT : 0;
3030 static inline int fd_copyin(void __user *param, void *address,
3033 return copy_from_user(address, param, size) ? -EFAULT : 0;
3036 static const char *drive_name(int type, int drive)
3038 struct floppy_struct *floppy;
3041 floppy = floppy_type + type;
3043 if (UDP->native_format)
3044 floppy = floppy_type + UDP->native_format;
3049 return floppy->name;
3055 static void raw_cmd_done(int flag)
3060 raw_cmd->flags |= FD_RAW_FAILURE;
3061 raw_cmd->flags |= FD_RAW_HARDFAILURE;
3063 raw_cmd->reply_count = inr;
3064 if (raw_cmd->reply_count > MAX_REPLIES)
3065 raw_cmd->reply_count = 0;
3066 for (i = 0; i < raw_cmd->reply_count; i++)
3067 raw_cmd->reply[i] = reply_buffer[i];
3069 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3070 unsigned long flags;
3071 flags = claim_dma_lock();
3072 raw_cmd->length = fd_get_dma_residue();
3073 release_dma_lock(flags);
3076 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
3077 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
3078 raw_cmd->flags |= FD_RAW_FAILURE;
3080 if (disk_change(current_drive))
3081 raw_cmd->flags |= FD_RAW_DISK_CHANGE;
3083 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
3084 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
3085 motor_off_callback(current_drive);
3087 if (raw_cmd->next &&
3088 (!(raw_cmd->flags & FD_RAW_FAILURE) ||
3089 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
3090 ((raw_cmd->flags & FD_RAW_FAILURE) ||
3091 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) {
3092 raw_cmd = raw_cmd->next;
3099 static struct cont_t raw_cmd_cont = {
3100 .interrupt = success_and_wakeup,
3101 .redo = floppy_start,
3102 .error = generic_failure,
3103 .done = raw_cmd_done
3106 static int raw_cmd_copyout(int cmd, void __user *param,
3107 struct floppy_raw_cmd *ptr)
3112 ret = copy_to_user(param, ptr, sizeof(*ptr));
3115 param += sizeof(struct floppy_raw_cmd);
3116 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) {
3117 if (ptr->length >= 0 &&
3118 ptr->length <= ptr->buffer_length) {
3119 long length = ptr->buffer_length - ptr->length;
3120 ret = fd_copyout(ptr->data, ptr->kernel_data,
3132 static void raw_cmd_free(struct floppy_raw_cmd **ptr)
3134 struct floppy_raw_cmd *next;
3135 struct floppy_raw_cmd *this;
3140 if (this->buffer_length) {
3141 fd_dma_mem_free((unsigned long)this->kernel_data,
3142 this->buffer_length);
3143 this->buffer_length = 0;
3151 static int raw_cmd_copyin(int cmd, void __user *param,
3152 struct floppy_raw_cmd **rcmd)
3154 struct floppy_raw_cmd *ptr;
3161 ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
3165 ret = copy_from_user(ptr, param, sizeof(*ptr));
3169 ptr->buffer_length = 0;
3170 param += sizeof(struct floppy_raw_cmd);
3171 if (ptr->cmd_count > 33)
3172 /* the command may now also take up the space
3173 * initially intended for the reply & the
3174 * reply count. Needed for long 82078 commands
3175 * such as RESTORE, which takes ... 17 command
3176 * bytes. Murphy's law #137: When you reserve
3177 * 16 bytes for a structure, you'll one day
3178 * discover that you really need 17...
3182 for (i = 0; i < 16; i++)
3184 ptr->resultcode = 0;
3185 ptr->kernel_data = NULL;
3187 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3188 if (ptr->length <= 0)
3190 ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length);
3191 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
3192 if (!ptr->kernel_data)
3194 ptr->buffer_length = ptr->length;
3196 if (ptr->flags & FD_RAW_WRITE) {
3197 ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length);
3202 if (ptr->flags & FD_RAW_MORE) {
3203 rcmd = &(ptr->next);
3211 static int raw_cmd_ioctl(int cmd, void __user *param)
3213 struct floppy_raw_cmd *my_raw_cmd;
3218 if (FDCS->rawcmd <= 1)
3220 for (drive = 0; drive < N_DRIVE; drive++) {
3221 if (FDC(drive) != fdc)
3223 if (drive == current_drive) {
3224 if (UDRS->fd_ref > 1) {
3228 } else if (UDRS->fd_ref) {
3237 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
3239 raw_cmd_free(&my_raw_cmd);
3243 raw_cmd = my_raw_cmd;
3244 cont = &raw_cmd_cont;
3245 ret = wait_til_done(floppy_start, true);
3246 debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n");
3248 if (ret != -EINTR && FDCS->reset)
3251 DRS->track = NO_TRACK;
3253 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
3256 raw_cmd_free(&my_raw_cmd);
3260 static int invalidate_drive(struct block_device *bdev)
3262 /* invalidate the buffer track to force a reread */
3263 set_bit((long)bdev->bd_disk->private_data, &fake_change);
3264 process_fd_request();
3265 check_disk_change(bdev);
3269 static int set_geometry(unsigned int cmd, struct floppy_struct *g,
3270 int drive, int type, struct block_device *bdev)
3274 /* sanity checking for parameters. */
3277 g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) ||
3278 /* check if reserved bits are set */
3279 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0)
3282 if (!capable(CAP_SYS_ADMIN))
3284 mutex_lock(&open_lock);
3285 if (lock_fdc(drive, true)) {
3286 mutex_unlock(&open_lock);
3289 floppy_type[type] = *g;
3290 floppy_type[type].name = "user format";
3291 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
3292 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] =
3293 floppy_type[type].size + 1;
3294 process_fd_request();
3295 for (cnt = 0; cnt < N_DRIVE; cnt++) {
3296 struct block_device *bdev = opened_bdev[cnt];
3297 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
3299 __invalidate_device(bdev);
3301 mutex_unlock(&open_lock);
3305 if (lock_fdc(drive, true))
3307 if (cmd != FDDEFPRM) {
3308 /* notice a disk change immediately, else
3309 * we lose our settings immediately*/
3310 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3313 oldStretch = g->stretch;
3314 user_params[drive] = *g;
3315 if (buffer_drive == drive)
3316 SUPBOUND(buffer_max, user_params[drive].sect);
3317 current_type[drive] = &user_params[drive];
3318 floppy_sizes[drive] = user_params[drive].size;
3319 if (cmd == FDDEFPRM)
3320 DRS->keep_data = -1;
3323 /* invalidation. Invalidate only when needed, i.e.
3324 * when there are already sectors in the buffer cache
3325 * whose number will change. This is useful, because
3326 * mtools often changes the geometry of the disk after
3327 * looking at the boot block */
3328 if (DRS->maxblock > user_params[drive].sect ||
3330 ((user_params[drive].sect ^ oldStretch) &
3331 (FD_SWAPSIDES | FD_SECTBASEMASK)))
3332 invalidate_drive(bdev);
3334 process_fd_request();
3339 /* handle obsolete ioctl's */
3340 static int ioctl_table[] = {
3368 static int normalize_ioctl(int *cmd, int *size)
3372 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) {
3373 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) {
3374 *size = _IOC_SIZE(*cmd);
3375 *cmd = ioctl_table[i];
3376 if (*size > _IOC_SIZE(*cmd)) {
3377 pr_info("ioctl not yet supported\n");
3386 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
3389 *g = &floppy_type[type];
3391 if (lock_fdc(drive, false))
3393 if (poll_drive(false, 0) == -EINTR)
3395 process_fd_request();
3396 *g = current_type[drive];
3403 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
3405 int drive = (long)bdev->bd_disk->private_data;
3406 int type = ITYPE(drive_state[drive].fd_device);
3407 struct floppy_struct *g;
3410 ret = get_floppy_geometry(drive, type, &g);
3414 geo->heads = g->head;
3415 geo->sectors = g->sect;
3416 geo->cylinders = g->track;
3420 static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
3421 unsigned long param)
3423 int drive = (long)bdev->bd_disk->private_data;
3424 int type = ITYPE(UDRS->fd_device);
3429 struct floppy_struct g; /* geometry */
3430 struct format_descr f;
3431 struct floppy_max_errors max_errors;
3432 struct floppy_drive_params dp;
3433 } inparam; /* parameters coming from user space */
3434 const void *outparam; /* parameters passed back to user space */
3436 /* convert compatibility eject ioctls into floppy eject ioctl.
3437 * We do this in order to provide a means to eject floppy disks before
3438 * installing the new fdutils package */
3439 if (cmd == CDROMEJECT || /* CD-ROM eject */
3440 cmd == 0x6470) { /* SunOS floppy eject */
3441 DPRINT("obsolete eject ioctl\n");
3442 DPRINT("please use floppycontrol --eject\n");
3446 if (!((cmd & 0xff00) == 0x0200))
3449 /* convert the old style command into a new style command */
3450 ret = normalize_ioctl(&cmd, &size);
3454 /* permission checks */
3455 if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) ||
3456 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
3459 if (WARN_ON(size < 0 || size > sizeof(inparam)))
3463 memset(&inparam, 0, sizeof(inparam));
3464 if (_IOC_DIR(cmd) & _IOC_WRITE) {
3465 ret = fd_copyin((void __user *)param, &inparam, size);
3472 if (UDRS->fd_ref != 1)
3473 /* somebody else has this drive open */
3475 if (lock_fdc(drive, true))
3478 /* do the actual eject. Fails on
3479 * non-Sparc architectures */
3480 ret = fd_eject(UNIT(drive));
3482 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
3483 set_bit(FD_VERIFY_BIT, &UDRS->flags);
3484 process_fd_request();
3487 if (lock_fdc(drive, true))
3489 current_type[drive] = NULL;
3490 floppy_sizes[drive] = MAX_DISK_SIZE << 1;
3491 UDRS->keep_data = 0;
3492 return invalidate_drive(bdev);
3495 return set_geometry(cmd, &inparam.g, drive, type, bdev);
3497 ret = get_floppy_geometry(drive, type,
3498 (struct floppy_struct **)&outparam);
3503 UDP->flags |= FTD_MSG;
3506 UDP->flags &= ~FTD_MSG;
3509 if (lock_fdc(drive, true))
3511 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3514 process_fd_request();
3515 if (ret & FD_VERIFY)
3517 if (!(ret & FD_DISK_WRITABLE))
3521 if (UDRS->fd_ref != 1)
3523 return do_format(drive, &inparam.f);
3526 if (lock_fdc(drive, true))
3528 return invalidate_drive(bdev);
3529 case FDSETEMSGTRESH:
3530 UDP->max_errors.reporting = (unsigned short)(param & 0x0f);
3533 outparam = &UDP->max_errors;
3536 UDP->max_errors = inparam.max_errors;
3539 outparam = drive_name(type, drive);
3540 SUPBOUND(size, strlen((const char *)outparam) + 1);
3549 if (lock_fdc(drive, true))
3551 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
3553 process_fd_request();
3559 return user_reset_fdc(drive, (int)param, true);
3564 memset(UDRWE, 0, sizeof(*UDRWE));
3572 if (lock_fdc(drive, true))
3575 i = raw_cmd_ioctl(cmd, (void __user *)param);
3578 process_fd_request();
3581 if (lock_fdc(drive, true))
3584 process_fd_request();
3590 if (_IOC_DIR(cmd) & _IOC_READ)
3591 return fd_copyout((void __user *)param, outparam, size);
3596 static void __init config_types(void)
3598 bool has_drive = false;
3601 /* read drive info out of physical CMOS */
3604 UDP->cmos = FLOPPY0_TYPE;
3606 if (!UDP->cmos && FLOPPY1_TYPE)
3607 UDP->cmos = FLOPPY1_TYPE;
3609 /* FIXME: additional physical CMOS drive detection should go here */
3611 for (drive = 0; drive < N_DRIVE; drive++) {
3612 unsigned int type = UDP->cmos;
3613 struct floppy_drive_params *params;
3614 const char *name = NULL;
3615 static char temparea[32];
3617 if (type < ARRAY_SIZE(default_drive_params)) {
3618 params = &default_drive_params[type].params;
3620 name = default_drive_params[type].name;
3621 allowed_drive_mask |= 1 << drive;
3623 allowed_drive_mask &= ~(1 << drive);
3625 params = &default_drive_params[0].params;
3626 sprintf(temparea, "unknown type %d (usb?)", type);
3630 const char *prepend;
3634 pr_info("Floppy drive(s):");
3639 pr_cont("%s fd%d is %s", prepend, drive, name);
3648 static int floppy_release(struct gendisk *disk, fmode_t mode)
3650 int drive = (long)disk->private_data;
3652 mutex_lock(&open_lock);
3653 if (UDRS->fd_ref < 0)
3655 else if (!UDRS->fd_ref--) {
3656 DPRINT("floppy_release with fd_ref == 0");
3660 opened_bdev[drive] = NULL;
3661 mutex_unlock(&open_lock);
3667 * floppy_open check for aliasing (/dev/fd0 can be the same as
3668 * /dev/PS0 etc), and disallows simultaneous access to the same
3669 * drive with different device numbers.
3671 static int floppy_open(struct block_device *bdev, fmode_t mode)
3673 int drive = (long)bdev->bd_disk->private_data;
3674 int old_dev, new_dev;
3679 mutex_lock(&open_lock);
3680 old_dev = UDRS->fd_device;
3681 if (opened_bdev[drive] && opened_bdev[drive] != bdev)
3684 if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) {
3685 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
3686 set_bit(FD_VERIFY_BIT, &UDRS->flags);
3689 if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL)))
3692 if (mode & FMODE_EXCL)
3697 opened_bdev[drive] = bdev;
3701 if (!floppy_track_buffer) {
3702 /* if opening an ED drive, reserve a big buffer,
3703 * else reserve a small one */
3704 if ((UDP->cmos == 6) || (UDP->cmos == 5))
3705 try = 64; /* Only 48 actually useful */
3707 try = 32; /* Only 24 actually useful */
3709 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3710 if (!tmp && !floppy_track_buffer) {
3711 try >>= 1; /* buffer only one side */
3713 tmp = (char *)fd_dma_mem_alloc(1024 * try);
3715 if (!tmp && !floppy_track_buffer)
3716 fallback_on_nodma_alloc(&tmp, 2048 * try);
3717 if (!tmp && !floppy_track_buffer) {
3718 DPRINT("Unable to allocate DMA memory\n");
3721 if (floppy_track_buffer) {
3723 fd_dma_mem_free((unsigned long)tmp, try * 1024);
3725 buffer_min = buffer_max = -1;
3726 floppy_track_buffer = tmp;
3727 max_buffer_sectors = try;
3731 new_dev = MINOR(bdev->bd_dev);
3732 UDRS->fd_device = new_dev;
3733 set_capacity(disks[drive], floppy_sizes[new_dev]);
3734 if (old_dev != -1 && old_dev != new_dev) {
3735 if (buffer_drive == drive)
3739 if (UFDCS->rawcmd == 1)
3742 if (!(mode & FMODE_NDELAY)) {
3743 if (mode & (FMODE_READ|FMODE_WRITE)) {
3744 UDRS->last_checked = 0;
3745 check_disk_change(bdev);
3746 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags))
3750 if ((mode & FMODE_WRITE) &&
3751 !test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags))
3754 mutex_unlock(&open_lock);
3757 if (UDRS->fd_ref < 0)
3762 opened_bdev[drive] = NULL;
3764 mutex_unlock(&open_lock);
3769 * Check if the disk has been changed or if a change has been faked.
3771 static int check_floppy_change(struct gendisk *disk)
3773 int drive = (long)disk->private_data;
3775 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
3776 test_bit(FD_VERIFY_BIT, &UDRS->flags))
3779 if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) {
3780 lock_fdc(drive, false);
3781 poll_drive(false, 0);
3782 process_fd_request();
3785 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
3786 test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
3787 test_bit(drive, &fake_change) ||
3788 (!ITYPE(UDRS->fd_device) && !current_type[drive]))
3794 * This implements "read block 0" for floppy_revalidate().
3795 * Needed for format autodetection, checking whether there is
3796 * a disk in the drive, and whether that disk is writable.
3799 static void floppy_rb0_complete(struct bio *bio, int err)
3801 complete((struct completion *)bio->bi_private);
3804 static int __floppy_read_block_0(struct block_device *bdev)
3807 struct bio_vec bio_vec;
3808 struct completion complete;
3812 page = alloc_page(GFP_NOIO);
3814 process_fd_request();
3818 size = bdev->bd_block_size;
3823 bio.bi_io_vec = &bio_vec;
3824 bio_vec.bv_page = page;
3825 bio_vec.bv_len = size;
3826 bio_vec.bv_offset = 0;
3832 bio.bi_flags = BIO_QUIET;
3833 init_completion(&complete);
3834 bio.bi_private = &complete;
3835 bio.bi_end_io = floppy_rb0_complete;
3837 submit_bio(READ, &bio);
3838 generic_unplug_device(bdev_get_queue(bdev));
3839 process_fd_request();
3840 wait_for_completion(&complete);
3847 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
3848 * the bootblock (block 0). "Autodetection" is also needed to check whether
3849 * there is a disk in the drive at all... Thus we also do it for fixed
3850 * geometry formats */
3851 static int floppy_revalidate(struct gendisk *disk)
3853 int drive = (long)disk->private_data;
3854 #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device))
3858 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
3859 test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
3860 test_bit(drive, &fake_change) || NO_GEOM) {
3861 if (atomic_read(&usage_count) == 0) {
3862 pr_info("VFS: revalidate called on non-open device.\n");
3865 lock_fdc(drive, false);
3866 cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
3867 test_bit(FD_VERIFY_BIT, &UDRS->flags));
3868 if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)) {
3869 process_fd_request(); /*already done by another thread */
3874 if (buffer_drive == drive)
3876 clear_bit(drive, &fake_change);
3877 clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
3882 res = __floppy_read_block_0(opened_bdev[drive]);
3885 poll_drive(false, FD_RAW_NEED_DISK);
3886 process_fd_request();
3889 set_capacity(disk, floppy_sizes[UDRS->fd_device]);
3893 static const struct block_device_operations floppy_fops = {
3894 .owner = THIS_MODULE,
3895 .open = floppy_open,
3896 .release = floppy_release,
3897 .locked_ioctl = fd_ioctl,
3898 .getgeo = fd_getgeo,
3899 .media_changed = check_floppy_change,
3900 .revalidate_disk = floppy_revalidate,
3904 * Floppy Driver initialization
3905 * =============================
3908 /* Determine the floppy disk controller type */
3909 /* This routine was written by David C. Niemi */
3910 static char __init get_fdc_version(void)
3914 output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */
3919 return FDC_NONE; /* No FDC present ??? */
3920 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3921 pr_info("FDC %d is an 8272A\n", fdc);
3922 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
3925 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
3930 if (!fdc_configure()) {
3931 pr_info("FDC %d is an 82072\n", fdc);
3932 return FDC_82072; /* 82072 doesn't know CONFIGURE */
3935 output_byte(FD_PERPENDICULAR);
3936 if (need_more_output() == MORE_OUTPUT) {
3939 pr_info("FDC %d is an 82072A\n", fdc);
3940 return FDC_82072A; /* 82072A as found on Sparcs. */
3943 output_byte(FD_UNLOCK);
3945 if ((r == 1) && (reply_buffer[0] == 0x80)) {
3946 pr_info("FDC %d is a pre-1991 82077\n", fdc);
3947 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
3950 if ((r != 1) || (reply_buffer[0] != 0x00)) {
3951 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
3955 output_byte(FD_PARTID);
3958 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
3962 if (reply_buffer[0] == 0x80) {
3963 pr_info("FDC %d is a post-1991 82077\n", fdc);
3964 return FDC_82077; /* Revised 82077AA passes all the tests */
3966 switch (reply_buffer[0] >> 5) {
3968 /* Either a 82078-1 or a 82078SL running at 5Volt */
3969 pr_info("FDC %d is an 82078.\n", fdc);
3972 pr_info("FDC %d is a 44pin 82078\n", fdc);
3975 pr_info("FDC %d is a S82078B\n", fdc);
3978 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc);
3981 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n",
3982 fdc, reply_buffer[0] >> 5);
3983 return FDC_82078_UNKN;
3985 } /* get_fdc_version */
3987 /* lilo configuration */
3989 static void __init floppy_set_flags(int *ints, int param, int param2)
3993 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
3995 default_drive_params[i].params.flags |= param2;
3997 default_drive_params[i].params.flags &= ~param2;
3999 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param);
4002 static void __init daring(int *ints, int param, int param2)
4006 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
4008 default_drive_params[i].params.select_delay = 0;
4009 default_drive_params[i].params.flags |=
4010 FD_SILENT_DCL_CLEAR;
4012 default_drive_params[i].params.select_delay =
4014 default_drive_params[i].params.flags &=
4015 ~FD_SILENT_DCL_CLEAR;
4018 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken");
4021 static void __init set_cmos(int *ints, int dummy, int dummy2)
4023 int current_drive = 0;
4026 DPRINT("wrong number of parameters for CMOS\n");
4029 current_drive = ints[1];
4030 if (current_drive < 0 || current_drive >= 8) {
4031 DPRINT("bad drive for set_cmos\n");
4035 if (current_drive >= 4 && !FDC2)
4039 DPRINT("setting CMOS code to %d\n", ints[2]);
4042 static struct param_table {
4044 void (*fn) (int *ints, int param, int param2);
4048 } config_params[] __initdata = {
4049 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4050 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
4051 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0},
4052 {"irq", NULL, &FLOPPY_IRQ, 6, 0},
4053 {"dma", NULL, &FLOPPY_DMA, 2, 0},
4054 {"daring", daring, NULL, 1, 0},
4056 {"two_fdc", NULL, &FDC2, 0x370, 0},
4057 {"one_fdc", NULL, &FDC2, 0, 0},
4059 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL},
4060 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL},
4061 {"messages", floppy_set_flags, NULL, 1, FTD_MSG},
4062 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR},
4063 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG},
4064 {"nodma", NULL, &can_use_virtual_dma, 1, 0},
4065 {"omnibook", NULL, &can_use_virtual_dma, 1, 0},
4066 {"yesdma", NULL, &can_use_virtual_dma, 0, 0},
4067 {"fifo_depth", NULL, &fifo_depth, 0xa, 0},
4068 {"nofifo", NULL, &no_fifo, 0x20, 0},
4069 {"usefifo", NULL, &no_fifo, 0, 0},
4070 {"cmos", set_cmos, NULL, 0, 0},
4071 {"slow", NULL, &slow_floppy, 1, 0},
4072 {"unexpected_interrupts", NULL, &print_unex, 1, 0},
4073 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0},
4074 {"L40SX", NULL, &print_unex, 0, 0}
4079 static int __init floppy_setup(char *str)
4085 str = get_options(str, ARRAY_SIZE(ints), ints);
4087 for (i = 0; i < ARRAY_SIZE(config_params); i++) {
4088 if (strcmp(str, config_params[i].name) == 0) {
4092 param = config_params[i].def_param;
4093 if (config_params[i].fn)
4094 config_params[i].fn(ints, param,
4097 if (config_params[i].var) {
4098 DPRINT("%s=%d\n", str, param);
4099 *config_params[i].var = param;
4106 DPRINT("unknown floppy option [%s]\n", str);
4108 DPRINT("allowed options are:");
4109 for (i = 0; i < ARRAY_SIZE(config_params); i++)
4110 pr_cont(" %s", config_params[i].name);
4113 DPRINT("botched floppy option\n");
4114 DPRINT("Read Documentation/blockdev/floppy.txt\n");
4118 static int have_no_fdc = -ENODEV;
4120 static ssize_t floppy_cmos_show(struct device *dev,
4121 struct device_attribute *attr, char *buf)
4123 struct platform_device *p = to_platform_device(dev);
4127 return sprintf(buf, "%X\n", UDP->cmos);
4130 DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL);
4132 static void floppy_device_release(struct device *dev)
4136 static int floppy_resume(struct device *dev)
4140 for (fdc = 0; fdc < N_FDC; fdc++)
4141 if (FDCS->address != -1)
4142 user_reset_fdc(-1, FD_RESET_ALWAYS, false);
4147 static const struct dev_pm_ops floppy_pm_ops = {
4148 .resume = floppy_resume,
4149 .restore = floppy_resume,
4152 static struct platform_driver floppy_driver = {
4155 .pm = &floppy_pm_ops,
4159 static struct platform_device floppy_device[N_DRIVE];
4161 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
4163 int drive = (*part & 3) | ((*part & 0x80) >> 5);
4164 if (drive >= N_DRIVE ||
4165 !(allowed_drive_mask & (1 << drive)) ||
4166 fdc_state[FDC(drive)].version == FDC_NONE)
4168 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type))
4171 return get_disk(disks[drive]);
4174 static int __init floppy_init(void)
4180 interruptjiffies = resultjiffies = jiffies;
4182 #if defined(CONFIG_PPC)
4183 if (check_legacy_ioport(FDC1))
4189 for (dr = 0; dr < N_DRIVE; dr++) {
4190 disks[dr] = alloc_disk(1);
4196 disks[dr]->major = FLOPPY_MAJOR;
4197 disks[dr]->first_minor = TOMINOR(dr);
4198 disks[dr]->fops = &floppy_fops;
4199 sprintf(disks[dr]->disk_name, "fd%d", dr);
4201 init_timer(&motor_off_timer[dr]);
4202 motor_off_timer[dr].data = dr;
4203 motor_off_timer[dr].function = motor_off_callback;
4206 err = register_blkdev(FLOPPY_MAJOR, "fd");
4210 err = platform_driver_register(&floppy_driver);
4212 goto out_unreg_blkdev;
4214 floppy_queue = blk_init_queue(do_fd_request, &floppy_lock);
4215 if (!floppy_queue) {
4217 goto out_unreg_driver;
4219 blk_queue_max_hw_sectors(floppy_queue, 64);
4221 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
4222 floppy_find, NULL, NULL);
4224 for (i = 0; i < 256; i++)
4226 floppy_sizes[i] = floppy_type[ITYPE(i)].size;
4228 floppy_sizes[i] = MAX_DISK_SIZE << 1;
4230 reschedule_timeout(MAXTIMEOUT, "floppy init");
4233 for (i = 0; i < N_FDC; i++) {
4235 memset(FDCS, 0, sizeof(*FDCS));
4238 #if defined(__sparc__) || defined(__mc68000__)
4239 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */
4243 FDCS->version = FDC_82072A;
4247 use_virtual_dma = can_use_virtual_dma & 1;
4248 fdc_state[0].address = FDC1;
4249 if (fdc_state[0].address == -1) {
4250 del_timer(&fd_timeout);
4252 goto out_unreg_region;
4255 fdc_state[1].address = FDC2;
4258 fdc = 0; /* reset fdc in case of unexpected interrupt */
4259 err = floppy_grab_irq_and_dma();
4261 del_timer(&fd_timeout);
4263 goto out_unreg_region;
4266 /* initialise drive state */
4267 for (drive = 0; drive < N_DRIVE; drive++) {
4268 memset(UDRS, 0, sizeof(*UDRS));
4269 memset(UDRWE, 0, sizeof(*UDRWE));
4270 set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags);
4271 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
4272 set_bit(FD_VERIFY_BIT, &UDRS->flags);
4273 UDRS->fd_device = -1;
4274 floppy_track_buffer = NULL;
4275 max_buffer_sectors = 0;
4278 * Small 10 msec delay to let through any interrupt that
4279 * initialization might have triggered, to not
4280 * confuse detection:
4284 for (i = 0; i < N_FDC; i++) {
4286 FDCS->driver_version = FD_DRIVER_VERSION;
4287 for (unit = 0; unit < 4; unit++)
4288 FDCS->track[unit] = 0;
4289 if (FDCS->address == -1)
4292 if (user_reset_fdc(-1, FD_RESET_ALWAYS, false)) {
4293 /* free ioports reserved by floppy_grab_irq_and_dma() */
4294 floppy_release_regions(fdc);
4296 FDCS->version = FDC_NONE;
4299 /* Try to determine the floppy controller type */
4300 FDCS->version = get_fdc_version();
4301 if (FDCS->version == FDC_NONE) {
4302 /* free ioports reserved by floppy_grab_irq_and_dma() */
4303 floppy_release_regions(fdc);
4307 if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A)
4308 can_use_virtual_dma = 0;
4311 /* Not all FDCs seem to be able to handle the version command
4312 * properly, so force a reset for the standard FDC clones,
4313 * to avoid interrupt garbage.
4315 user_reset_fdc(-1, FD_RESET_ALWAYS, false);
4318 del_timer(&fd_timeout);
4322 DPRINT("no floppy controllers found\n");
4324 goto out_flush_work;
4327 for (drive = 0; drive < N_DRIVE; drive++) {
4328 if (!(allowed_drive_mask & (1 << drive)))
4330 if (fdc_state[FDC(drive)].version == FDC_NONE)
4333 floppy_device[drive].name = floppy_device_name;
4334 floppy_device[drive].id = drive;
4335 floppy_device[drive].dev.release = floppy_device_release;
4337 err = platform_device_register(&floppy_device[drive]);
4339 goto out_flush_work;
4341 err = device_create_file(&floppy_device[drive].dev,
4344 goto out_unreg_platform_dev;
4346 /* to be cleaned up... */
4347 disks[drive]->private_data = (void *)(long)drive;
4348 disks[drive]->queue = floppy_queue;
4349 disks[drive]->flags |= GENHD_FL_REMOVABLE;
4350 disks[drive]->driverfs_dev = &floppy_device[drive].dev;
4351 add_disk(disks[drive]);
4356 out_unreg_platform_dev:
4357 platform_device_unregister(&floppy_device[drive]);
4359 flush_scheduled_work();
4360 if (atomic_read(&usage_count))
4361 floppy_release_irq_and_dma();
4363 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4364 blk_cleanup_queue(floppy_queue);
4366 platform_driver_unregister(&floppy_driver);
4368 unregister_blkdev(FLOPPY_MAJOR, "fd");
4371 del_timer(&motor_off_timer[dr]);
4372 put_disk(disks[dr]);
4377 static const struct io_region {
4382 /* address + 3 is sometimes reserved by pnp bios for motherboard */
4384 /* address + 6 is reserved, and may be taken by IDE.
4385 * Unfortunately, Adaptec doesn't know this :-(, */
4389 static void floppy_release_allocated_regions(int fdc, const struct io_region *p)
4391 while (p != io_regions) {
4393 release_region(FDCS->address + p->offset, p->size);
4397 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
4399 static int floppy_request_regions(int fdc)
4401 const struct io_region *p;
4403 for (p = io_regions; p < ARRAY_END(io_regions); p++) {
4404 if (!request_region(FDCS->address + p->offset,
4405 p->size, "floppy")) {
4406 DPRINT("Floppy io-port 0x%04lx in use\n",
4407 FDCS->address + p->offset);
4408 floppy_release_allocated_regions(fdc, p);
4415 static void floppy_release_regions(int fdc)
4417 floppy_release_allocated_regions(fdc, ARRAY_END(io_regions));
4420 static int floppy_grab_irq_and_dma(void)
4422 if (atomic_inc_return(&usage_count) > 1)
4426 * We might have scheduled a free_irq(), wait it to
4429 flush_scheduled_work();
4431 if (fd_request_irq()) {
4432 DPRINT("Unable to grab IRQ%d for the floppy driver\n",
4434 atomic_dec(&usage_count);
4437 if (fd_request_dma()) {
4438 DPRINT("Unable to grab DMA%d for the floppy driver\n",
4440 if (can_use_virtual_dma & 2)
4441 use_virtual_dma = can_use_virtual_dma = 1;
4442 if (!(can_use_virtual_dma & 1)) {
4444 atomic_dec(&usage_count);
4449 for (fdc = 0; fdc < N_FDC; fdc++) {
4450 if (FDCS->address != -1) {
4451 if (floppy_request_regions(fdc))
4455 for (fdc = 0; fdc < N_FDC; fdc++) {
4456 if (FDCS->address != -1) {
4458 fd_outb(FDCS->dor, FD_DOR);
4462 set_dor(0, ~0, 8); /* avoid immediate interrupt */
4464 for (fdc = 0; fdc < N_FDC; fdc++)
4465 if (FDCS->address != -1)
4466 fd_outb(FDCS->dor, FD_DOR);
4468 * The driver will try and free resources and relies on us
4469 * to know if they were allocated or not.
4472 irqdma_allocated = 1;
4478 floppy_release_regions(fdc);
4479 atomic_dec(&usage_count);
4483 static void floppy_release_irq_and_dma(void)
4490 unsigned long tmpaddr;
4492 if (!atomic_dec_and_test(&usage_count))
4495 if (irqdma_allocated) {
4499 irqdma_allocated = 0;
4505 floppy_enable_hlt();
4507 if (floppy_track_buffer && max_buffer_sectors) {
4508 tmpsize = max_buffer_sectors * 1024;
4509 tmpaddr = (unsigned long)floppy_track_buffer;
4510 floppy_track_buffer = NULL;
4511 max_buffer_sectors = 0;
4512 buffer_min = buffer_max = -1;
4513 fd_dma_mem_free(tmpaddr, tmpsize);
4516 for (drive = 0; drive < N_FDC * 4; drive++)
4517 if (timer_pending(motor_off_timer + drive))
4518 pr_info("motor off timer %d still active\n", drive);
4521 if (timer_pending(&fd_timeout))
4522 pr_info("floppy timer still active:%s\n", timeout_message);
4523 if (timer_pending(&fd_timer))
4524 pr_info("auxiliary floppy timer still active\n");
4525 if (work_pending(&floppy_work))
4526 pr_info("work still pending\n");
4528 for (fdc = 0; fdc < N_FDC; fdc++)
4529 if (FDCS->address != -1)
4530 floppy_release_regions(fdc);
4536 static char *floppy;
4538 static void __init parse_floppy_cfg_string(char *cfg)
4544 while (*cfg && *cfg != ' ' && *cfg != '\t')
4555 static int __init floppy_module_init(void)
4558 parse_floppy_cfg_string(floppy);
4559 return floppy_init();
4561 module_init(floppy_module_init);
4563 static void __exit floppy_module_exit(void)
4567 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
4568 unregister_blkdev(FLOPPY_MAJOR, "fd");
4569 platform_driver_unregister(&floppy_driver);
4571 for (drive = 0; drive < N_DRIVE; drive++) {
4572 del_timer_sync(&motor_off_timer[drive]);
4574 if ((allowed_drive_mask & (1 << drive)) &&
4575 fdc_state[FDC(drive)].version != FDC_NONE) {
4576 del_gendisk(disks[drive]);
4577 device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
4578 platform_device_unregister(&floppy_device[drive]);
4580 put_disk(disks[drive]);
4583 del_timer_sync(&fd_timeout);
4584 del_timer_sync(&fd_timer);
4585 blk_cleanup_queue(floppy_queue);
4587 if (atomic_read(&usage_count))
4588 floppy_release_irq_and_dma();
4590 /* eject disk, if any */
4594 module_exit(floppy_module_exit);
4596 module_param(floppy, charp, 0);
4597 module_param(FLOPPY_IRQ, int, 0);
4598 module_param(FLOPPY_DMA, int, 0);
4599 MODULE_AUTHOR("Alain L. Knaff");
4600 MODULE_SUPPORTED_DEVICE("fd");
4601 MODULE_LICENSE("GPL");
4603 /* This doesn't actually get used other than for module information */
4604 static const struct pnp_device_id floppy_pnpids[] = {
4609 MODULE_DEVICE_TABLE(pnp, floppy_pnpids);
4613 __setup("floppy=", floppy_setup);
4614 module_init(floppy_init)
4617 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);