linux-headers (unknown)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _LINUX_FD_H
3 #define _LINUX_FD_H
4
5 #include <linux/ioctl.h>
6
7
8 /* New file layout: Now the ioctl definitions immediately follow the
9 * definitions of the structures that they use */
10
11 /*
12 * Geometry
13 */
14 struct floppy_struct {
15 unsigned int size, /* nr of sectors total */
16 sect, /* sectors per track */
17 head, /* nr of heads */
18 track, /* nr of tracks */
19 stretch; /* bit 0 !=0 means double track steps */
20 /* bit 1 != 0 means swap sides */
21 /* bits 2..9 give the first sector */
22 /* number (the LSB is flipped) */
23 #define FD_STRETCH 1
24 #define FD_SWAPSIDES 2
25 #define FD_ZEROBASED 4
26 #define FD_SECTBASEMASK 0x3FC
27 #define FD_MKSECTBASE(s) (((s) ^ 1) << 2)
28 #define FD_SECTBASE(floppy) ((((floppy)->stretch & FD_SECTBASEMASK) >> 2) ^ 1)
29
30 unsigned char gap, /* gap1 size */
31
32 rate, /* data rate. |= 0x40 for perpendicular */
33 #define FD_2M 0x4
34 #define FD_SIZECODEMASK 0x38
35 #define FD_SIZECODE(floppy) (((((floppy)->rate&FD_SIZECODEMASK)>> 3)+ 2) %8)
36 #define FD_SECTSIZE(floppy) ( (floppy)->rate & FD_2M ? \
37 512 : 128 << FD_SIZECODE(floppy) )
38 #define FD_PERP 0x40
39
40 spec1, /* stepping rate, head unload time */
41 fmt_gap; /* gap2 size */
42 const char * name; /* used only for predefined formats */
43 };
44
45
46 /* commands needing write access have 0x40 set */
47 /* commands needing super user access have 0x80 set */
48
49 #define FDCLRPRM _IO(2, 0x41)
50 /* clear user-defined parameters */
51
52 #define FDSETPRM _IOW(2, 0x42, struct floppy_struct)
53 #define FDSETMEDIAPRM FDSETPRM
54 /* set user-defined parameters for current media */
55
56 #define FDDEFPRM _IOW(2, 0x43, struct floppy_struct)
57 #define FDGETPRM _IOR(2, 0x04, struct floppy_struct)
58 #define FDDEFMEDIAPRM FDDEFPRM
59 #define FDGETMEDIAPRM FDGETPRM
60 /* set/get disk parameters */
61
62
63 #define FDMSGON _IO(2,0x45)
64 #define FDMSGOFF _IO(2,0x46)
65 /* issue/don't issue kernel messages on media type change */
66
67
68 /*
69 * Formatting (obsolete)
70 */
71 #define FD_FILL_BYTE 0xF6 /* format fill byte. */
72
73 struct format_descr {
74 unsigned int device,head,track;
75 };
76
77 #define FDFMTBEG _IO(2,0x47)
78 /* begin formatting a disk */
79 #define FDFMTTRK _IOW(2,0x48, struct format_descr)
80 /* format the specified track */
81 #define FDFMTEND _IO(2,0x49)
82 /* end formatting a disk */
83
84
85 /*
86 * Error thresholds
87 */
88 struct floppy_max_errors {
89 unsigned int
90 abort, /* number of errors to be reached before aborting */
91 read_track, /* maximal number of errors permitted to read an
92 * entire track at once */
93 reset, /* maximal number of errors before a reset is tried */
94 recal, /* maximal number of errors before a recalibrate is
95 * tried */
96
97 /*
98 * Threshold for reporting FDC errors to the console.
99 * Setting this to zero may flood your screen when using
100 * ultra cheap floppies ;-)
101 */
102 reporting;
103
104 };
105
106 #define FDSETEMSGTRESH _IO(2,0x4a)
107 /* set fdc error reporting threshold */
108
109 #define FDFLUSH _IO(2,0x4b)
110 /* flush buffers for media; either for verifying media, or for
111 * handling a media change without closing the file descriptor */
112
113 #define FDSETMAXERRS _IOW(2, 0x4c, struct floppy_max_errors)
114 #define FDGETMAXERRS _IOR(2, 0x0e, struct floppy_max_errors)
115 /* set/get abortion and read_track threshold. See also floppy_drive_params
116 * structure */
117
118
119 typedef char floppy_drive_name[16];
120 #define FDGETDRVTYP _IOR(2, 0x0f, floppy_drive_name)
121 /* get drive type: 5 1/4 or 3 1/2 */
122
123
124 /*
125 * Drive parameters (user modifiable)
126 */
127 struct floppy_drive_params {
128 signed char cmos; /* CMOS type */
129
130 /* Spec2 is (HLD<<1 | ND), where HLD is head load time (1=2ms, 2=4 ms
131 * etc) and ND is set means no DMA. Hardcoded to 6 (HLD=6ms, use DMA).
132 */
133 unsigned long max_dtr; /* Step rate, usec */
134 unsigned long hlt; /* Head load/settle time, msec */
135 unsigned long hut; /* Head unload time (remnant of
136 * 8" drives) */
137 unsigned long srt; /* Step rate, usec */
138
139 unsigned long spinup; /* time needed for spinup (expressed
140 * in jiffies) */
141 unsigned long spindown; /* timeout needed for spindown */
142 unsigned char spindown_offset; /* decides in which position the disk
143 * will stop */
144 unsigned char select_delay; /* delay to wait after select */
145 unsigned char rps; /* rotations per second */
146 unsigned char tracks; /* maximum number of tracks */
147 unsigned long timeout; /* timeout for interrupt requests */
148
149 unsigned char interleave_sect; /* if there are more sectors, use
150 * interleave */
151
152 struct floppy_max_errors max_errors;
153
154 char flags; /* various flags, including ftd_msg */
155 /*
156 * Announce successful media type detection and media information loss after
157 * disk changes.
158 * Also used to enable/disable printing of overrun warnings.
159 */
160
161 #define FTD_MSG 0x10
162 #define FD_BROKEN_DCL 0x20
163 #define FD_DEBUG 0x02
164 #define FD_SILENT_DCL_CLEAR 0x4
165 #define FD_INVERTED_DCL 0x80 /* must be 0x80, because of hardware
166 considerations */
167
168 char read_track; /* use readtrack during probing? */
169
170 /*
171 * Auto-detection. Each drive type has eight formats which are
172 * used in succession to try to read the disk. If the FDC cannot lock onto
173 * the disk, the next format is tried. This uses the variable 'probing'.
174 */
175
176 #define FD_AUTODETECT_SIZE 8
177
178 short autodetect[FD_AUTODETECT_SIZE]; /* autodetected formats */
179
180 int checkfreq; /* how often should the drive be checked for disk
181 * changes */
182 int native_format; /* native format of this drive */
183 };
184
185 enum {
186 FD_NEED_TWADDLE_BIT, /* more magic */
187 FD_VERIFY_BIT, /* inquire for write protection */
188 FD_DISK_NEWCHANGE_BIT, /* change detected, and no action undertaken yet
189 * to clear media change status */
190 FD_UNUSED_BIT,
191 FD_DISK_CHANGED_BIT, /* disk has been changed since last i/o */
192 FD_DISK_WRITABLE_BIT, /* disk is writable */
193 FD_OPEN_SHOULD_FAIL_BIT
194 };
195
196 #define FDSETDRVPRM _IOW(2, 0x90, struct floppy_drive_params)
197 #define FDGETDRVPRM _IOR(2, 0x11, struct floppy_drive_params)
198 /* set/get drive parameters */
199
200
201 /*
202 * Current drive state (not directly modifiable by user, readonly)
203 */
204 struct floppy_drive_struct {
205 unsigned long flags;
206 /* values for these flags */
207 #define FD_NEED_TWADDLE (1 << FD_NEED_TWADDLE_BIT)
208 #define FD_VERIFY (1 << FD_VERIFY_BIT)
209 #define FD_DISK_NEWCHANGE (1 << FD_DISK_NEWCHANGE_BIT)
210 #define FD_DISK_CHANGED (1 << FD_DISK_CHANGED_BIT)
211 #define FD_DISK_WRITABLE (1 << FD_DISK_WRITABLE_BIT)
212
213 unsigned long spinup_date;
214 unsigned long select_date;
215 unsigned long first_read_date;
216 short probed_format;
217 short track; /* current track */
218 short maxblock; /* id of highest block read */
219 short maxtrack; /* id of highest half track read */
220 int generation; /* how many diskchanges? */
221
222 /*
223 * (User-provided) media information is _not_ discarded after a media change
224 * if the corresponding keep_data flag is non-zero. Positive values are
225 * decremented after each probe.
226 */
227 int keep_data;
228
229 /* Prevent "aliased" accesses. */
230 int fd_ref;
231 int fd_device;
232 unsigned long last_checked; /* when was the drive last checked for a disk
233 * change? */
234
235 char *dmabuf;
236 int bufblocks;
237 };
238
239 #define FDGETDRVSTAT _IOR(2, 0x12, struct floppy_drive_struct)
240 #define FDPOLLDRVSTAT _IOR(2, 0x13, struct floppy_drive_struct)
241 /* get drive state: GET returns the cached state, POLL polls for new state */
242
243
244 /*
245 * reset FDC
246 */
247 enum reset_mode {
248 FD_RESET_IF_NEEDED, /* reset only if the reset flags is set */
249 FD_RESET_IF_RAWCMD, /* obsolete */
250 FD_RESET_ALWAYS /* reset always */
251 };
252 #define FDRESET _IO(2, 0x54)
253
254
255 /*
256 * FDC state
257 */
258 struct floppy_fdc_state {
259 int spec1; /* spec1 value last used */
260 int spec2; /* spec2 value last used */
261 int dtr;
262 unsigned char version; /* FDC version code */
263 unsigned char dor;
264 unsigned long address; /* io address */
265 unsigned int rawcmd:2;
266 unsigned int reset:1;
267 unsigned int need_configure:1;
268 unsigned int perp_mode:2;
269 unsigned int has_fifo:1;
270 unsigned int driver_version; /* version code for floppy driver */
271 #define FD_DRIVER_VERSION 0x100
272 /* user programs using the floppy API should use floppy_fdc_state to
273 * get the version number of the floppy driver that they are running
274 * on. If this version number is bigger than the one compiled into the
275 * user program (the FD_DRIVER_VERSION define), it should be prepared
276 * to bigger structures
277 */
278
279 unsigned char track[4];
280 /* Position of the heads of the 4 units attached to this FDC,
281 * as stored on the FDC. In the future, the position as stored
282 * on the FDC might not agree with the actual physical
283 * position of these drive heads. By allowing such
284 * disagreement, it will be possible to reset the FDC without
285 * incurring the expensive cost of repositioning all heads.
286 * Right now, these positions are hard wired to 0. */
287
288 };
289
290 #define FDGETFDCSTAT _IOR(2, 0x15, struct floppy_fdc_state)
291
292
293 /*
294 * Asynchronous Write error tracking
295 */
296 struct floppy_write_errors {
297 /* Write error logging.
298 *
299 * These fields can be cleared with the FDWERRORCLR ioctl.
300 * Only writes that were attempted but failed due to a physical media
301 * error are logged. write(2) calls that fail and return an error code
302 * to the user process are not counted.
303 */
304
305 unsigned int write_errors; /* number of physical write errors
306 * encountered */
307
308 /* position of first and last write errors */
309 unsigned long first_error_sector;
310 int first_error_generation;
311 unsigned long last_error_sector;
312 int last_error_generation;
313
314 unsigned int badness; /* highest retry count for a read or write
315 * operation */
316 };
317
318 #define FDWERRORCLR _IO(2, 0x56)
319 /* clear write error and badness information */
320 #define FDWERRORGET _IOR(2, 0x17, struct floppy_write_errors)
321 /* get write error and badness information */
322
323
324 /*
325 * Raw commands
326 */
327 /* new interface flag: now we can do them in batches */
328 #define FDHAVEBATCHEDRAWCMD
329
330 struct floppy_raw_cmd {
331 unsigned int flags;
332 #define FD_RAW_READ 1
333 #define FD_RAW_WRITE 2
334 #define FD_RAW_NO_MOTOR 4
335 #define FD_RAW_DISK_CHANGE 4 /* out: disk change flag was set */
336 #define FD_RAW_INTR 8 /* wait for an interrupt */
337 #define FD_RAW_SPIN 0x10 /* spin up the disk for this command */
338 #define FD_RAW_NO_MOTOR_AFTER 0x20 /* switch the motor off after command
339 * completion */
340 #define FD_RAW_NEED_DISK 0x40 /* this command needs a disk to be present */
341 #define FD_RAW_NEED_SEEK 0x80 /* this command uses an implied seek (soft) */
342
343 /* more "in" flags */
344 #define FD_RAW_MORE 0x100 /* more records follow */
345 #define FD_RAW_STOP_IF_FAILURE 0x200 /* stop if we encounter a failure */
346 #define FD_RAW_STOP_IF_SUCCESS 0x400 /* stop if command successful */
347 #define FD_RAW_SOFTFAILURE 0x800 /* consider the return value for failure
348 * detection too */
349
350 /* more "out" flags */
351 #define FD_RAW_FAILURE 0x10000 /* command sent to fdc, fdc returned error */
352 #define FD_RAW_HARDFAILURE 0x20000 /* fdc had to be reset, or timed out */
353
354 void *data;
355 char *kernel_data; /* location of data buffer in the kernel */
356 struct floppy_raw_cmd *next; /* used for chaining of raw cmd's
357 * within the kernel */
358 long length; /* in: length of dma transfer. out: remaining bytes */
359 long phys_length; /* physical length, if different from dma length */
360 int buffer_length; /* length of allocated buffer */
361
362 unsigned char rate;
363
364 #define FD_RAW_CMD_SIZE 16
365 #define FD_RAW_REPLY_SIZE 16
366 #define FD_RAW_CMD_FULLSIZE (FD_RAW_CMD_SIZE + 1 + FD_RAW_REPLY_SIZE)
367
368 /* The command may take up the space initially intended for the reply
369 * and the reply count. Needed for long 82078 commands such as RESTORE,
370 * which takes 17 command bytes.
371 */
372
373 unsigned char cmd_count;
374 union {
375 struct {
376 unsigned char cmd[FD_RAW_CMD_SIZE];
377 unsigned char reply_count;
378 unsigned char reply[FD_RAW_REPLY_SIZE];
379 };
380 unsigned char fullcmd[FD_RAW_CMD_FULLSIZE];
381 };
382 int track;
383 int resultcode;
384
385 int reserved1;
386 int reserved2;
387 };
388
389 #define FDRAWCMD _IO(2, 0x58)
390 /* send a raw command to the fdc. Structure size not included, because of
391 * batches */
392
393 #define FDTWADDLE _IO(2, 0x59)
394 /* flicker motor-on bit before reading a sector. Experimental */
395
396
397 #define FDEJECT _IO(2, 0x5a)
398 /* eject the disk */
399
400
401
402 #endif /* _LINUX_FD_H */
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