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 */
14struct 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
73struct 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 */
88struct 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
119typedef 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 */
127struct 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 short autodetect[8]; /* autodetected formats */
176
177 int checkfreq; /* how often should the drive be checked for disk
178 * changes */
179 int native_format; /* native format of this drive */
180};
181
182enum {
183 FD_NEED_TWADDLE_BIT, /* more magic */
184 FD_VERIFY_BIT, /* inquire for write protection */
185 FD_DISK_NEWCHANGE_BIT, /* change detected, and no action undertaken yet
186 * to clear media change status */
187 FD_UNUSED_BIT,
188 FD_DISK_CHANGED_BIT, /* disk has been changed since last i/o */
189 FD_DISK_WRITABLE_BIT, /* disk is writable */
190 FD_OPEN_SHOULD_FAIL_BIT
191};
192
193#define FDSETDRVPRM _IOW(2, 0x90, struct floppy_drive_params)
194#define FDGETDRVPRM _IOR(2, 0x11, struct floppy_drive_params)
195/* set/get drive parameters */
196
197
198/*
199 * Current drive state (not directly modifiable by user, readonly)
200 */
201struct floppy_drive_struct {
202 unsigned long flags;
203/* values for these flags */
204#define FD_NEED_TWADDLE (1 << FD_NEED_TWADDLE_BIT)
205#define FD_VERIFY (1 << FD_VERIFY_BIT)
206#define FD_DISK_NEWCHANGE (1 << FD_DISK_NEWCHANGE_BIT)
207#define FD_DISK_CHANGED (1 << FD_DISK_CHANGED_BIT)
208#define FD_DISK_WRITABLE (1 << FD_DISK_WRITABLE_BIT)
209
210 unsigned long spinup_date;
211 unsigned long select_date;
212 unsigned long first_read_date;
213 short probed_format;
214 short track; /* current track */
215 short maxblock; /* id of highest block read */
216 short maxtrack; /* id of highest half track read */
217 int generation; /* how many diskchanges? */
218
219/*
220 * (User-provided) media information is _not_ discarded after a media change
221 * if the corresponding keep_data flag is non-zero. Positive values are
222 * decremented after each probe.
223 */
224 int keep_data;
225
226 /* Prevent "aliased" accesses. */
227 int fd_ref;
228 int fd_device;
229 unsigned long last_checked; /* when was the drive last checked for a disk
230 * change? */
231
232 char *dmabuf;
233 int bufblocks;
234};
235
236#define FDGETDRVSTAT _IOR(2, 0x12, struct floppy_drive_struct)
237#define FDPOLLDRVSTAT _IOR(2, 0x13, struct floppy_drive_struct)
238/* get drive state: GET returns the cached state, POLL polls for new state */
239
240
241/*
242 * reset FDC
243 */
244enum reset_mode {
245 FD_RESET_IF_NEEDED, /* reset only if the reset flags is set */
246 FD_RESET_IF_RAWCMD, /* obsolete */
247 FD_RESET_ALWAYS /* reset always */
248};
249#define FDRESET _IO(2, 0x54)
250
251
252/*
253 * FDC state
254 */
255struct floppy_fdc_state {
256 int spec1; /* spec1 value last used */
257 int spec2; /* spec2 value last used */
258 int dtr;
259 unsigned char version; /* FDC version code */
260 unsigned char dor;
261 unsigned long address; /* io address */
262 unsigned int rawcmd:2;
263 unsigned int reset:1;
264 unsigned int need_configure:1;
265 unsigned int perp_mode:2;
266 unsigned int has_fifo:1;
267 unsigned int driver_version; /* version code for floppy driver */
268#define FD_DRIVER_VERSION 0x100
269/* user programs using the floppy API should use floppy_fdc_state to
270 * get the version number of the floppy driver that they are running
271 * on. If this version number is bigger than the one compiled into the
272 * user program (the FD_DRIVER_VERSION define), it should be prepared
273 * to bigger structures
274 */
275
276 unsigned char track[4];
277 /* Position of the heads of the 4 units attached to this FDC,
278 * as stored on the FDC. In the future, the position as stored
279 * on the FDC might not agree with the actual physical
280 * position of these drive heads. By allowing such
281 * disagreement, it will be possible to reset the FDC without
282 * incurring the expensive cost of repositioning all heads.
283 * Right now, these positions are hard wired to 0. */
284
285};
286
287#define FDGETFDCSTAT _IOR(2, 0x15, struct floppy_fdc_state)
288
289
290/*
291 * Asynchronous Write error tracking
292 */
293struct floppy_write_errors {
294 /* Write error logging.
295 *
296 * These fields can be cleared with the FDWERRORCLR ioctl.
297 * Only writes that were attempted but failed due to a physical media
298 * error are logged. write(2) calls that fail and return an error code
299 * to the user process are not counted.
300 */
301
302 unsigned int write_errors; /* number of physical write errors
303 * encountered */
304
305 /* position of first and last write errors */
306 unsigned long first_error_sector;
307 int first_error_generation;
308 unsigned long last_error_sector;
309 int last_error_generation;
310
311 unsigned int badness; /* highest retry count for a read or write
312 * operation */
313};
314
315#define FDWERRORCLR _IO(2, 0x56)
316/* clear write error and badness information */
317#define FDWERRORGET _IOR(2, 0x17, struct floppy_write_errors)
318/* get write error and badness information */
319
320
321/*
322 * Raw commands
323 */
324/* new interface flag: now we can do them in batches */
325#define FDHAVEBATCHEDRAWCMD
326
327struct floppy_raw_cmd {
328 unsigned int flags;
329#define FD_RAW_READ 1
330#define FD_RAW_WRITE 2
331#define FD_RAW_NO_MOTOR 4
332#define FD_RAW_DISK_CHANGE 4 /* out: disk change flag was set */
333#define FD_RAW_INTR 8 /* wait for an interrupt */
334#define FD_RAW_SPIN 0x10 /* spin up the disk for this command */
335#define FD_RAW_NO_MOTOR_AFTER 0x20 /* switch the motor off after command
336 * completion */
337#define FD_RAW_NEED_DISK 0x40 /* this command needs a disk to be present */
338#define FD_RAW_NEED_SEEK 0x80 /* this command uses an implied seek (soft) */
339
340/* more "in" flags */
341#define FD_RAW_MORE 0x100 /* more records follow */
342#define FD_RAW_STOP_IF_FAILURE 0x200 /* stop if we encounter a failure */
343#define FD_RAW_STOP_IF_SUCCESS 0x400 /* stop if command successful */
344#define FD_RAW_SOFTFAILURE 0x800 /* consider the return value for failure
345 * detection too */
346
347/* more "out" flags */
348#define FD_RAW_FAILURE 0x10000 /* command sent to fdc, fdc returned error */
349#define FD_RAW_HARDFAILURE 0x20000 /* fdc had to be reset, or timed out */
350
351 void *data;
352 char *kernel_data; /* location of data buffer in the kernel */
353 struct floppy_raw_cmd *next; /* used for chaining of raw cmd's
354 * within the kernel */
355 long length; /* in: length of dma transfer. out: remaining bytes */
356 long phys_length; /* physical length, if different from dma length */
357 int buffer_length; /* length of allocated buffer */
358
359 unsigned char rate;
360 unsigned char cmd_count;
361 unsigned char cmd[16];
362 unsigned char reply_count;
363 unsigned char reply[16];
364 int track;
365 int resultcode;
366
367 int reserved1;
368 int reserved2;
369};
370
371#define FDRAWCMD _IO(2, 0x58)
372/* send a raw command to the fdc. Structure size not included, because of
373 * batches */
374
375#define FDTWADDLE _IO(2, 0x59)
376/* flicker motor-on bit before reading a sector. Experimental */
377
378
379#define FDEJECT _IO(2, 0x5a)
380/* eject the disk */
381
382
383
384#endif /* _LINUX_FD_H */
385

source code of include/linux/fd.h