aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/fd.h
blob: f5d194af07a878b093501bbada51bc51a1ca0710 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
#ifndef _LINUX_FD_H
#define _LINUX_FD_H

#include <linux/ioctl.h>
#include <linux/compiler.h>

/* New file layout: Now the ioctl definitions immediately follow the
 * definitions of the structures that they use */

/*
 * Geometry
 */
struct floppy_struct {
	unsigned int	size,		/* nr of sectors total */
			sect,		/* sectors per track */
			head,		/* nr of heads */
			track,		/* nr of tracks */
			stretch;	/* bit 0 !=0 means double track steps */
					/* bit 1 != 0 means swap sides */
					/* bits 2..9 give the first sector */
					/*  number (the LSB is flipped) */
#define FD_STRETCH 1
#define FD_SWAPSIDES 2
#define FD_ZEROBASED 4
#define FD_SECTBASEMASK 0x3FC
#define FD_MKSECTBASE(s) (((s) ^ 1) << 2)
#define FD_SECTBASE(floppy) ((((floppy)->stretch & FD_SECTBASEMASK) >> 2) ^ 1)

	unsigned char	gap,		/* gap1 size */

			rate,		/* data rate. |= 0x40 for perpendicular */
#define FD_2M 0x4
#define FD_SIZECODEMASK 0x38
#define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8)
#define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \
			     512 : 128 << FD_SIZECODE(floppy) )
#define FD_PERP 0x40

			spec1,		/* stepping rate, head unload time */
			fmt_gap;	/* gap2 size */
	const char	* name; /* used only for predefined formats */
};


/* commands needing write access have 0x40 set */
/* commands needing super user access have 0x80 set */

#define FDCLRPRM _IO(2, 0x41)
/* clear user-defined parameters */

#define FDSETPRM _IOW(2, 0x42, struct floppy_struct) 
#define FDSETMEDIAPRM FDSETPRM
/* set user-defined parameters for current media */

#define FDDEFPRM _IOW(2, 0x43, struct floppy_struct) 
#define FDGETPRM _IOR(2, 0x04, struct floppy_struct)
#define FDDEFMEDIAPRM FDDEFPRM
#define FDGETMEDIAPRM FDGETPRM
/* set/get disk parameters */


#define	FDMSGON  _IO(2,0x45)
#define	FDMSGOFF _IO(2,0x46)
/* issue/don't issue kernel messages on media type change */


/* 
 * Formatting (obsolete)
 */
#define FD_FILL_BYTE 0xF6 /* format fill byte. */

struct format_descr {
	unsigned int device,head,track;
};

#define FDFMTBEG _IO(2,0x47)
/* begin formatting a disk */
#define	FDFMTTRK _IOW(2,0x48, struct format_descr)
/* format the specified track */
#define FDFMTEND _IO(2,0x49)
/* end formatting a disk */


/*
 * Error thresholds
 */
struct floppy_max_errors {
	unsigned int
	  abort,      /* number of errors to be reached before aborting */
	  read_track, /* maximal number of errors permitted to read an
		       * entire track at once */
	  reset,      /* maximal number of errors before a reset is tried */
	  recal,      /* maximal number of errors before a recalibrate is
		       * tried */

	  /*
	   * Threshold for reporting FDC errors to the console.
	   * Setting this to zero may flood your screen when using
	   * ultra cheap floppies ;-)
	   */
	  reporting;

};

#define FDSETEMSGTRESH	_IO(2,0x4a)
/* set fdc error reporting threshold */

#define FDFLUSH  _IO(2,0x4b)
/* flush buffers for media; either for verifying media, or for
 * handling a media change without closing the file descriptor */

#define FDSETMAXERRS _IOW(2, 0x4c, struct floppy_max_errors)
#define FDGETMAXERRS _IOR(2, 0x0e, struct floppy_max_errors)
/* set/get abortion and read_track threshold. See also floppy_drive_params
 * structure */


typedef char floppy_drive_name[16];
#define FDGETDRVTYP _IOR(2, 0x0f, floppy_drive_name)
/* get drive type: 5 1/4 or 3 1/2 */


/*
 * Drive parameters (user modifiable)
 */
struct floppy_drive_params {
	signed char cmos;		/* CMOS type */
	
	/* Spec2 is (HLD<<1 | ND), where HLD is head load time (1=2ms, 2=4 ms 
	 * etc) and ND is set means no DMA. Hardcoded to 6 (HLD=6ms, use DMA).
	 */
	unsigned long max_dtr;		/* Step rate, usec */
	unsigned long hlt;     		/* Head load/settle time, msec */
	unsigned long hut;     		/* Head unload time (remnant of 
					 * 8" drives) */
	unsigned long srt;     		/* Step rate, usec */

	unsigned long spinup;		/* time needed for spinup (expressed
					 * in jiffies) */
	unsigned long spindown;		/* timeout needed for spindown */
	unsigned char spindown_offset;	/* decides in which position the disk
					 * will stop */
	unsigned char select_delay;	/* delay to wait after select */
	unsigned char rps;		/* rotations per second */
	unsigned char tracks;		/* maximum number of tracks */
	unsigned long timeout;		/* timeout for interrupt requests */
	
	unsigned char interleave_sect;	/* if there are more sectors, use 
					 * interleave */
	
	struct floppy_max_errors max_errors;
	
	char flags;			/* various flags, including ftd_msg */
/*
 * Announce successful media type detection and media information loss after
 * disk changes.
 * Also used to enable/disable printing of overrun warnings.
 */

#define FTD_MSG 0x10
#define FD_BROKEN_DCL 0x20
#define FD_DEBUG 0x02
#define FD_SILENT_DCL_CLEAR 0x4
#define FD_INVERTED_DCL 0x80 /* must be 0x80, because of hardware 
				considerations */

	char read_track;		/* use readtrack during probing? */

/*
 * Auto-detection. Each drive type has eight formats which are
 * used in succession to try to read the disk. If the FDC cannot lock onto
 * the disk, the next format is tried. This uses the variable 'probing'.
 */
	short autodetect[8];		/* autodetected formats */
	
	int checkfreq; /* how often should the drive be checked for disk 
			* changes */
	int native_format; /* native format of this drive */
};

enum {
	FD_NEED_TWADDLE_BIT,	/* more magic */
	FD_VERIFY_BIT,		/* inquire for write protection */
	FD_DISK_NEWCHANGE_BIT,	/* change detected, and no action undertaken yet
				 * to clear media change status */
	FD_UNUSED_BIT,
	FD_DISK_CHANGED_BIT,	/* disk has been changed since last i/o */
	FD_DISK_WRITABLE_BIT	/* disk is writable */
};

#define FDSETDRVPRM _IOW(2, 0x90, struct floppy_drive_params)
#define FDGETDRVPRM _IOR(2, 0x11, struct floppy_drive_params)
/* set/get drive parameters */


/*
 * Current drive state (not directly modifiable by user, readonly)
 */
struct floppy_drive_struct {
	unsigned long flags;
/* values for these flags */
#define FD_NEED_TWADDLE (1 << FD_NEED_TWADDLE_BIT)
#define FD_VERIFY (1 << FD_VERIFY_BIT)
#define FD_DISK_NEWCHANGE (1 << FD_DISK_NEWCHANGE_BIT)
#define FD_DISK_CHANGED (1 << FD_DISK_CHANGED_BIT)
#define FD_DISK_WRITABLE (1 << FD_DISK_WRITABLE_BIT)

	unsigned long spinup_date;
	unsigned long select_date;
	unsigned long first_read_date;
	short probed_format;
	short track; /* current track */
	short maxblock; /* id of highest block read */
	short maxtrack; /* id of highest half track read */
	int generation; /* how many diskchanges? */

/*
 * (User-provided) media information is _not_ discarded after a media change
 * if the corresponding keep_data flag is non-zero. Positive values are
 * decremented after each probe.
 */
	int keep_data;
	
	/* Prevent "aliased" accesses. */
	int fd_ref;
	int fd_device;
	unsigned long last_checked; /* when was the drive last checked for a disk 
			   * change? */
	
	char *dmabuf;
	int bufblocks;
};

#define FDGETDRVSTAT _IOR(2, 0x12, struct floppy_drive_struct)
#define FDPOLLDRVSTAT _IOR(2, 0x13, struct floppy_drive_struct)
/* get drive state: GET returns the cached state, POLL polls for new state */


/*
 * reset FDC
 */
enum reset_mode {
	FD_RESET_IF_NEEDED,	/* reset only if the reset flags is set */
	FD_RESET_IF_RAWCMD,	/* obsolete */
	FD_RESET_ALWAYS		/* reset always */
};
#define FDRESET _IO(2, 0x54)


/*
 * FDC state
 */
struct floppy_fdc_state {	
	int spec1;		/* spec1 value last used */
	int spec2;		/* spec2 value last used */
	int dtr;
	unsigned char version;	/* FDC version code */
	unsigned char dor;
	unsigned long address;	/* io address */
	unsigned int rawcmd:2;
	unsigned int reset:1;
	unsigned int need_configure:1;
	unsigned int perp_mode:2;
	unsigned int has_fifo:1;
	unsigned int driver_version;	/* version code for floppy driver */
#define FD_DRIVER_VERSION 0x100
/* user programs using the floppy API should use floppy_fdc_state to
 * get the version number of the floppy driver that they are running
 * on. If this version number is bigger than the one compiled into the
 * user program (the FD_DRIVER_VERSION define), it should be prepared
 * to bigger structures
 */

	unsigned char track[4];
	/* Position of the heads of the 4 units attached to this FDC,
	 * as stored on the FDC. In the future, the position as stored
	 * on the FDC might not agree with the actual physical
	 * position of these drive heads. By allowing such
	 * disagreement, it will be possible to reset the FDC without
	 * incurring the expensive cost of repositioning all heads.
	 * Right now, these positions are hard wired to 0. */

};

#define FDGETFDCSTAT _IOR(2, 0x15, struct floppy_fdc_state)


/*
 * Asynchronous Write error tracking
 */
struct floppy_write_errors {
	/* Write error logging.
	 *
	 * These fields can be cleared with the FDWERRORCLR ioctl.
	 * Only writes that were attempted but failed due to a physical media
	 * error are logged.  write(2) calls that fail and return an error code
	 * to the user process are not counted.
	 */

	unsigned int write_errors;  /* number of physical write errors 
				     * encountered */
	
	/* position of first and last write errors */
	unsigned long first_error_sector;
	int           first_error_generation;
	unsigned long last_error_sector;
	int           last_error_generation;
	
	unsigned int badness; /* highest retry count for a read or write 
			       * operation */
};

#define FDWERRORCLR  _IO(2, 0x56)
/* clear write error and badness information */
#define FDWERRORGET  _IOR(2, 0x17, struct floppy_write_errors)
/* get write error and badness information */


/*
 * Raw commands
 */
/* new interface flag: now we can do them in batches */
#define FDHAVEBATCHEDRAWCMD

struct floppy_raw_cmd {
	unsigned int flags;
#define FD_RAW_READ 1
#define FD_RAW_WRITE 2
#define FD_RAW_NO_MOTOR 4
#define FD_RAW_DISK_CHANGE 4 /* out: disk change flag was set */
#define FD_RAW_INTR 8    /* wait for an interrupt */
#define FD_RAW_SPIN 0x10 /* spin up the disk for this command */
#define FD_RAW_NO_MOTOR_AFTER 0x20 /* switch the motor off after command 
				    * completion */
#define FD_RAW_NEED_DISK 0x40  /* this command needs a disk to be present */
#define FD_RAW_NEED_SEEK 0x80  /* this command uses an implied seek (soft) */

/* more "in" flags */
#define FD_RAW_MORE 0x100  /* more records follow */
#define FD_RAW_STOP_IF_FAILURE 0x200 /* stop if we encounter a failure */
#define FD_RAW_STOP_IF_SUCCESS 0x400 /* stop if command successful */
#define FD_RAW_SOFTFAILURE 0x800 /* consider the return value for failure
				  * detection too */

/* more "out" flags */
#define FD_RAW_FAILURE 0x10000 /* command sent to fdc, fdc returned error */
#define FD_RAW_HARDFAILURE 0x20000 /* fdc had to be reset, or timed out */

	void __user *data;
	char *kernel_data; /* location of data buffer in the kernel */
	struct floppy_raw_cmd *next; /* used for chaining of raw cmd's 
				      * within the kernel */
	long length; /* in: length of dma transfer. out: remaining bytes */
	long phys_length; /* physical length, if different from dma length */
	int buffer_length; /* length of allocated buffer */

	unsigned char rate;
	unsigned char cmd_count;
	unsigned char cmd[16];
	unsigned char reply_count;
	unsigned char reply[16];
	int track;
	int resultcode;

	int reserved1;
	int reserved2;
};

#define FDRAWCMD _IO(2, 0x58)
/* send a raw command to the fdc. Structure size not included, because of
 * batches */

#define FDTWADDLE _IO(2, 0x59)
/* flicker motor-on bit before reading a sector. Experimental */


#define FDEJECT _IO(2, 0x5a)
/* eject the disk */

#endif