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7d438178 | 1 | |
847ec80b JC |
2 | /* The industrial I/O core |
3 | * | |
4 | * Copyright (c) 2008 Jonathan Cameron | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License version 2 as published by | |
8 | * the Free Software Foundation. | |
9 | */ | |
847ec80b JC |
10 | #ifndef _INDUSTRIAL_IO_H_ |
11 | #define _INDUSTRIAL_IO_H_ | |
12 | ||
13 | #include <linux/device.h> | |
14 | #include <linux/cdev.h> | |
06458e27 | 15 | #include <linux/iio/types.h> |
acd82567 | 16 | #include <linux/of.h> |
847ec80b | 17 | /* IIO TODO LIST */ |
751a3700 | 18 | /* |
847ec80b JC |
19 | * Provide means of adjusting timer accuracy. |
20 | * Currently assumes nano seconds. | |
21 | */ | |
22 | ||
1d892719 | 23 | enum iio_chan_info_enum { |
5ccb3adb JC |
24 | IIO_CHAN_INFO_RAW = 0, |
25 | IIO_CHAN_INFO_PROCESSED, | |
26 | IIO_CHAN_INFO_SCALE, | |
c8a9f805 JC |
27 | IIO_CHAN_INFO_OFFSET, |
28 | IIO_CHAN_INFO_CALIBSCALE, | |
29 | IIO_CHAN_INFO_CALIBBIAS, | |
30 | IIO_CHAN_INFO_PEAK, | |
31 | IIO_CHAN_INFO_PEAK_SCALE, | |
32 | IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW, | |
33 | IIO_CHAN_INFO_AVERAGE_RAW, | |
df94aba8 | 34 | IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY, |
3f7f642b | 35 | IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY, |
ce85a1cb | 36 | IIO_CHAN_INFO_SAMP_FREQ, |
a6b12855 MH |
37 | IIO_CHAN_INFO_FREQUENCY, |
38 | IIO_CHAN_INFO_PHASE, | |
b65d6212 | 39 | IIO_CHAN_INFO_HARDWAREGAIN, |
7c9ab035 | 40 | IIO_CHAN_INFO_HYSTERESIS, |
899d90bd | 41 | IIO_CHAN_INFO_INT_TIME, |
a88bfe78 | 42 | IIO_CHAN_INFO_ENABLE, |
bcdf28fb | 43 | IIO_CHAN_INFO_CALIBHEIGHT, |
d37f6836 | 44 | IIO_CHAN_INFO_CALIBWEIGHT, |
2f0ecb7c IT |
45 | IIO_CHAN_INFO_DEBOUNCE_COUNT, |
46 | IIO_CHAN_INFO_DEBOUNCE_TIME, | |
c8a85854 | 47 | IIO_CHAN_INFO_CALIBEMISSIVITY, |
faaa4495 | 48 | IIO_CHAN_INFO_OVERSAMPLING_RATIO, |
1d892719 JC |
49 | }; |
50 | ||
3704432f JC |
51 | enum iio_shared_by { |
52 | IIO_SEPARATE, | |
c006ec83 JC |
53 | IIO_SHARED_BY_TYPE, |
54 | IIO_SHARED_BY_DIR, | |
55 | IIO_SHARED_BY_ALL | |
3704432f JC |
56 | }; |
57 | ||
8310b86c JC |
58 | enum iio_endian { |
59 | IIO_CPU, | |
60 | IIO_BE, | |
61 | IIO_LE, | |
62 | }; | |
63 | ||
5f420b42 LPC |
64 | struct iio_chan_spec; |
65 | struct iio_dev; | |
66 | ||
67 | /** | |
68 | * struct iio_chan_spec_ext_info - Extended channel info attribute | |
69 | * @name: Info attribute name | |
70 | * @shared: Whether this attribute is shared between all channels. | |
71 | * @read: Read callback for this info attribute, may be NULL. | |
72 | * @write: Write callback for this info attribute, may be NULL. | |
fc6d1139 | 73 | * @private: Data private to the driver. |
5f420b42 LPC |
74 | */ |
75 | struct iio_chan_spec_ext_info { | |
76 | const char *name; | |
3704432f | 77 | enum iio_shared_by shared; |
fc6d1139 MH |
78 | ssize_t (*read)(struct iio_dev *, uintptr_t private, |
79 | struct iio_chan_spec const *, char *buf); | |
80 | ssize_t (*write)(struct iio_dev *, uintptr_t private, | |
81 | struct iio_chan_spec const *, const char *buf, | |
82 | size_t len); | |
83 | uintptr_t private; | |
5f420b42 LPC |
84 | }; |
85 | ||
5212cc8a LPC |
86 | /** |
87 | * struct iio_enum - Enum channel info attribute | |
7dcd7b60 PM |
88 | * @items: An array of strings. |
89 | * @num_items: Length of the item array. | |
90 | * @set: Set callback function, may be NULL. | |
91 | * @get: Get callback function, may be NULL. | |
5212cc8a LPC |
92 | * |
93 | * The iio_enum struct can be used to implement enum style channel attributes. | |
94 | * Enum style attributes are those which have a set of strings which map to | |
95 | * unsigned integer values. The IIO enum helper code takes care of mapping | |
96 | * between value and string as well as generating a "_available" file which | |
97 | * contains a list of all available items. The set callback will be called when | |
98 | * the attribute is updated. The last parameter is the index to the newly | |
99 | * activated item. The get callback will be used to query the currently active | |
100 | * item and is supposed to return the index for it. | |
101 | */ | |
102 | struct iio_enum { | |
103 | const char * const *items; | |
104 | unsigned int num_items; | |
105 | int (*set)(struct iio_dev *, const struct iio_chan_spec *, unsigned int); | |
106 | int (*get)(struct iio_dev *, const struct iio_chan_spec *); | |
107 | }; | |
108 | ||
109 | ssize_t iio_enum_available_read(struct iio_dev *indio_dev, | |
110 | uintptr_t priv, const struct iio_chan_spec *chan, char *buf); | |
111 | ssize_t iio_enum_read(struct iio_dev *indio_dev, | |
112 | uintptr_t priv, const struct iio_chan_spec *chan, char *buf); | |
113 | ssize_t iio_enum_write(struct iio_dev *indio_dev, | |
114 | uintptr_t priv, const struct iio_chan_spec *chan, const char *buf, | |
115 | size_t len); | |
116 | ||
117 | /** | |
118 | * IIO_ENUM() - Initialize enum extended channel attribute | |
7dcd7b60 PM |
119 | * @_name: Attribute name |
120 | * @_shared: Whether the attribute is shared between all channels | |
d25b3808 | 121 | * @_e: Pointer to an iio_enum struct |
5212cc8a LPC |
122 | * |
123 | * This should usually be used together with IIO_ENUM_AVAILABLE() | |
124 | */ | |
125 | #define IIO_ENUM(_name, _shared, _e) \ | |
126 | { \ | |
127 | .name = (_name), \ | |
128 | .shared = (_shared), \ | |
129 | .read = iio_enum_read, \ | |
130 | .write = iio_enum_write, \ | |
131 | .private = (uintptr_t)(_e), \ | |
132 | } | |
133 | ||
134 | /** | |
135 | * IIO_ENUM_AVAILABLE() - Initialize enum available extended channel attribute | |
7dcd7b60 | 136 | * @_name: Attribute name ("_available" will be appended to the name) |
d25b3808 | 137 | * @_e: Pointer to an iio_enum struct |
5212cc8a | 138 | * |
d25b3808 | 139 | * Creates a read only attribute which lists all the available enum items in a |
5212cc8a LPC |
140 | * space separated list. This should usually be used together with IIO_ENUM() |
141 | */ | |
142 | #define IIO_ENUM_AVAILABLE(_name, _e) \ | |
143 | { \ | |
144 | .name = (_name "_available"), \ | |
3704432f | 145 | .shared = IIO_SHARED_BY_TYPE, \ |
5212cc8a LPC |
146 | .read = iio_enum_available_read, \ |
147 | .private = (uintptr_t)(_e), \ | |
148 | } | |
149 | ||
b4e3ac0a LPC |
150 | /** |
151 | * struct iio_event_spec - specification for a channel event | |
152 | * @type: Type of the event | |
153 | * @dir: Direction of the event | |
154 | * @mask_separate: Bit mask of enum iio_event_info values. Attributes | |
155 | * set in this mask will be registered per channel. | |
156 | * @mask_shared_by_type: Bit mask of enum iio_event_info values. Attributes | |
157 | * set in this mask will be shared by channel type. | |
158 | * @mask_shared_by_dir: Bit mask of enum iio_event_info values. Attributes | |
159 | * set in this mask will be shared by channel type and | |
160 | * direction. | |
161 | * @mask_shared_by_all: Bit mask of enum iio_event_info values. Attributes | |
162 | * set in this mask will be shared by all channels. | |
163 | */ | |
164 | struct iio_event_spec { | |
165 | enum iio_event_type type; | |
166 | enum iio_event_direction dir; | |
167 | unsigned long mask_separate; | |
168 | unsigned long mask_shared_by_type; | |
169 | unsigned long mask_shared_by_dir; | |
170 | unsigned long mask_shared_by_all; | |
171 | }; | |
172 | ||
1d892719 JC |
173 | /** |
174 | * struct iio_chan_spec - specification of a single channel | |
175 | * @type: What type of measurement is the channel making. | |
a16561c6 | 176 | * @channel: What number do we wish to assign the channel. |
1d892719 JC |
177 | * @channel2: If there is a second number for a differential |
178 | * channel then this is it. If modified is set then the | |
179 | * value here specifies the modifier. | |
180 | * @address: Driver specific identifier. | |
7dcd7b60 | 181 | * @scan_index: Monotonic index to give ordering in scans when read |
1d892719 JC |
182 | * from a buffer. |
183 | * @scan_type: Sign: 's' or 'u' to specify signed or unsigned | |
184 | * realbits: Number of valid bits of data | |
185 | * storage_bits: Realbits + padding | |
186 | * shift: Shift right by this before masking out | |
187 | * realbits. | |
8310b86c | 188 | * endianness: little or big endian |
0ee8546a SP |
189 | * repeat: Number of times real/storage bits |
190 | * repeats. When the repeat element is | |
191 | * more than 1, then the type element in | |
192 | * sysfs will show a repeat value. | |
193 | * Otherwise, the number of repetitions is | |
194 | * omitted. | |
8655cc49 JC |
195 | * @info_mask_separate: What information is to be exported that is specific to |
196 | * this channel. | |
197 | * @info_mask_shared_by_type: What information is to be exported that is shared | |
9761696f | 198 | * by all channels of the same type. |
c006ec83 JC |
199 | * @info_mask_shared_by_dir: What information is to be exported that is shared |
200 | * by all channels of the same direction. | |
201 | * @info_mask_shared_by_all: What information is to be exported that is shared | |
202 | * by all channels. | |
b4e3ac0a LPC |
203 | * @event_spec: Array of events which should be registered for this |
204 | * channel. | |
205 | * @num_event_specs: Size of the event_spec array. | |
5f420b42 LPC |
206 | * @ext_info: Array of extended info attributes for this channel. |
207 | * The array is NULL terminated, the last element should | |
9cc113bc | 208 | * have its name field set to NULL. |
1d892719 JC |
209 | * @extend_name: Allows labeling of channel attributes with an |
210 | * informative name. Note this has no effect codes etc, | |
211 | * unlike modifiers. | |
17879488 | 212 | * @datasheet_name: A name used in in-kernel mapping of channels. It should |
4abf6f8b | 213 | * correspond to the first name that the channel is referred |
6c63dded JC |
214 | * to by in the datasheet (e.g. IND), or the nearest |
215 | * possible compound name (e.g. IND-INC). | |
1d892719 JC |
216 | * @modified: Does a modifier apply to this channel. What these are |
217 | * depends on the channel type. Modifier is set in | |
218 | * channel2. Examples are IIO_MOD_X for axial sensors about | |
219 | * the 'x' axis. | |
220 | * @indexed: Specify the channel has a numerical index. If not, | |
a16561c6 PM |
221 | * the channel index number will be suppressed for sysfs |
222 | * attributes but not for event codes. | |
c3668a0f | 223 | * @output: Channel is output. |
ade7ef7b | 224 | * @differential: Channel is differential. |
1d892719 JC |
225 | */ |
226 | struct iio_chan_spec { | |
227 | enum iio_chan_type type; | |
228 | int channel; | |
229 | int channel2; | |
230 | unsigned long address; | |
231 | int scan_index; | |
232 | struct { | |
233 | char sign; | |
234 | u8 realbits; | |
235 | u8 storagebits; | |
236 | u8 shift; | |
0ee8546a | 237 | u8 repeat; |
8310b86c | 238 | enum iio_endian endianness; |
1d892719 | 239 | } scan_type; |
8655cc49 JC |
240 | long info_mask_separate; |
241 | long info_mask_shared_by_type; | |
c006ec83 JC |
242 | long info_mask_shared_by_dir; |
243 | long info_mask_shared_by_all; | |
b4e3ac0a LPC |
244 | const struct iio_event_spec *event_spec; |
245 | unsigned int num_event_specs; | |
5f420b42 | 246 | const struct iio_chan_spec_ext_info *ext_info; |
344692b1 | 247 | const char *extend_name; |
6c63dded | 248 | const char *datasheet_name; |
1d892719 JC |
249 | unsigned modified:1; |
250 | unsigned indexed:1; | |
c6fc8062 | 251 | unsigned output:1; |
ade7ef7b | 252 | unsigned differential:1; |
1d892719 | 253 | }; |
df9c1c42 | 254 | |
48e44ce0 LPC |
255 | |
256 | /** | |
257 | * iio_channel_has_info() - Checks whether a channel supports a info attribute | |
258 | * @chan: The channel to be queried | |
259 | * @type: Type of the info attribute to be checked | |
260 | * | |
261 | * Returns true if the channels supports reporting values for the given info | |
262 | * attribute type, false otherwise. | |
263 | */ | |
264 | static inline bool iio_channel_has_info(const struct iio_chan_spec *chan, | |
265 | enum iio_chan_info_enum type) | |
266 | { | |
1c297a66 | 267 | return (chan->info_mask_separate & BIT(type)) | |
c006ec83 JC |
268 | (chan->info_mask_shared_by_type & BIT(type)) | |
269 | (chan->info_mask_shared_by_dir & BIT(type)) | | |
270 | (chan->info_mask_shared_by_all & BIT(type)); | |
48e44ce0 LPC |
271 | } |
272 | ||
07d4655b JC |
273 | #define IIO_CHAN_SOFT_TIMESTAMP(_si) { \ |
274 | .type = IIO_TIMESTAMP, \ | |
275 | .channel = -1, \ | |
276 | .scan_index = _si, \ | |
277 | .scan_type = { \ | |
278 | .sign = 's', \ | |
279 | .realbits = 64, \ | |
280 | .storagebits = 64, \ | |
281 | }, \ | |
282 | } | |
1d892719 | 283 | |
847ec80b JC |
284 | /** |
285 | * iio_get_time_ns() - utility function to get a time stamp for events etc | |
286 | **/ | |
287 | static inline s64 iio_get_time_ns(void) | |
288 | { | |
fb31cc15 | 289 | return ktime_get_real_ns(); |
847ec80b JC |
290 | } |
291 | ||
847ec80b JC |
292 | /* Device operating modes */ |
293 | #define INDIO_DIRECT_MODE 0x01 | |
ec3afa40 | 294 | #define INDIO_BUFFER_TRIGGERED 0x02 |
03af03ad | 295 | #define INDIO_BUFFER_SOFTWARE 0x04 |
ec3afa40 | 296 | #define INDIO_BUFFER_HARDWARE 0x08 |
847ec80b | 297 | |
ec3afa40 | 298 | #define INDIO_ALL_BUFFER_MODES \ |
03af03ad | 299 | (INDIO_BUFFER_TRIGGERED | INDIO_BUFFER_HARDWARE | INDIO_BUFFER_SOFTWARE) |
847ec80b | 300 | |
9fbfb4b3 SP |
301 | #define INDIO_MAX_RAW_ELEMENTS 4 |
302 | ||
43a4360e | 303 | struct iio_trigger; /* forward declaration */ |
7ae8cf62 | 304 | struct iio_dev; |
43a4360e | 305 | |
6fe8135f JC |
306 | /** |
307 | * struct iio_info - constant information about device | |
308 | * @driver_module: module structure used to ensure correct | |
309 | * ownership of chrdevs etc | |
6fe8135f JC |
310 | * @event_attrs: event control attributes |
311 | * @attrs: general purpose device attributes | |
312 | * @read_raw: function to request a value from the device. | |
313 | * mask specifies which value. Note 0 means a reading of | |
314 | * the channel in question. Return value will specify the | |
315 | * type of value returned by the device. val and val2 will | |
316 | * contain the elements making up the returned value. | |
9fbfb4b3 SP |
317 | * @read_raw_multi: function to return values from the device. |
318 | * mask specifies which value. Note 0 means a reading of | |
319 | * the channel in question. Return value will specify the | |
320 | * type of value returned by the device. vals pointer | |
321 | * contain the elements making up the returned value. | |
322 | * max_len specifies maximum number of elements | |
323 | * vals pointer can contain. val_len is used to return | |
324 | * length of valid elements in vals. | |
6fe8135f JC |
325 | * @write_raw: function to write a value to the device. |
326 | * Parameters are the same as for read_raw. | |
5c04af04 MH |
327 | * @write_raw_get_fmt: callback function to query the expected |
328 | * format/precision. If not set by the driver, write_raw | |
329 | * returns IIO_VAL_INT_PLUS_MICRO. | |
6fe8135f JC |
330 | * @read_event_config: find out if the event is enabled. |
331 | * @write_event_config: set if the event is enabled. | |
cb955852 LPC |
332 | * @read_event_value: read a configuration value associated with the event. |
333 | * @write_event_value: write a configuration value for the event. | |
43a4360e MH |
334 | * @validate_trigger: function to validate the trigger when the |
335 | * current trigger gets changed. | |
c3668a0f PM |
336 | * @update_scan_mode: function to configure device and scan buffer when |
337 | * channels have changed | |
338 | * @debugfs_reg_access: function to read or write register value of device | |
acd82567 II |
339 | * @of_xlate: function pointer to obtain channel specifier index. |
340 | * When #iio-cells is greater than '0', the driver could | |
341 | * provide a custom of_xlate function that reads the | |
342 | * *args* and returns the appropriate index in registered | |
343 | * IIO channels array. | |
f4f4673b OP |
344 | * @hwfifo_set_watermark: function pointer to set the current hardware |
345 | * fifo watermark level; see hwfifo_* entries in | |
346 | * Documentation/ABI/testing/sysfs-bus-iio for details on | |
347 | * how the hardware fifo operates | |
348 | * @hwfifo_flush_to_buffer: function pointer to flush the samples stored | |
349 | * in the hardware fifo to the device buffer. The driver | |
350 | * should not flush more than count samples. The function | |
351 | * must return the number of samples flushed, 0 if no | |
352 | * samples were flushed or a negative integer if no samples | |
353 | * were flushed and there was an error. | |
6fe8135f JC |
354 | **/ |
355 | struct iio_info { | |
356 | struct module *driver_module; | |
6fe8135f JC |
357 | struct attribute_group *event_attrs; |
358 | const struct attribute_group *attrs; | |
359 | ||
360 | int (*read_raw)(struct iio_dev *indio_dev, | |
361 | struct iio_chan_spec const *chan, | |
362 | int *val, | |
363 | int *val2, | |
364 | long mask); | |
365 | ||
9fbfb4b3 SP |
366 | int (*read_raw_multi)(struct iio_dev *indio_dev, |
367 | struct iio_chan_spec const *chan, | |
368 | int max_len, | |
369 | int *vals, | |
370 | int *val_len, | |
371 | long mask); | |
372 | ||
6fe8135f JC |
373 | int (*write_raw)(struct iio_dev *indio_dev, |
374 | struct iio_chan_spec const *chan, | |
375 | int val, | |
376 | int val2, | |
377 | long mask); | |
378 | ||
5c04af04 MH |
379 | int (*write_raw_get_fmt)(struct iio_dev *indio_dev, |
380 | struct iio_chan_spec const *chan, | |
381 | long mask); | |
382 | ||
6fe8135f | 383 | int (*read_event_config)(struct iio_dev *indio_dev, |
b4e3ac0a LPC |
384 | const struct iio_chan_spec *chan, |
385 | enum iio_event_type type, | |
386 | enum iio_event_direction dir); | |
387 | ||
cb955852 | 388 | int (*write_event_config)(struct iio_dev *indio_dev, |
b4e3ac0a LPC |
389 | const struct iio_chan_spec *chan, |
390 | enum iio_event_type type, | |
391 | enum iio_event_direction dir, | |
392 | int state); | |
393 | ||
cb955852 | 394 | int (*read_event_value)(struct iio_dev *indio_dev, |
b4e3ac0a LPC |
395 | const struct iio_chan_spec *chan, |
396 | enum iio_event_type type, | |
397 | enum iio_event_direction dir, | |
398 | enum iio_event_info info, int *val, int *val2); | |
399 | ||
cb955852 | 400 | int (*write_event_value)(struct iio_dev *indio_dev, |
b4e3ac0a LPC |
401 | const struct iio_chan_spec *chan, |
402 | enum iio_event_type type, | |
403 | enum iio_event_direction dir, | |
404 | enum iio_event_info info, int val, int val2); | |
405 | ||
43a4360e MH |
406 | int (*validate_trigger)(struct iio_dev *indio_dev, |
407 | struct iio_trigger *trig); | |
4d5f8d3d JC |
408 | int (*update_scan_mode)(struct iio_dev *indio_dev, |
409 | const unsigned long *scan_mask); | |
e553f182 MH |
410 | int (*debugfs_reg_access)(struct iio_dev *indio_dev, |
411 | unsigned reg, unsigned writeval, | |
412 | unsigned *readval); | |
acd82567 II |
413 | int (*of_xlate)(struct iio_dev *indio_dev, |
414 | const struct of_phandle_args *iiospec); | |
f4f4673b OP |
415 | int (*hwfifo_set_watermark)(struct iio_dev *indio_dev, unsigned val); |
416 | int (*hwfifo_flush_to_buffer)(struct iio_dev *indio_dev, | |
417 | unsigned count); | |
6fe8135f JC |
418 | }; |
419 | ||
1612244f JC |
420 | /** |
421 | * struct iio_buffer_setup_ops - buffer setup related callbacks | |
422 | * @preenable: [DRIVER] function to run prior to marking buffer enabled | |
423 | * @postenable: [DRIVER] function to run after marking buffer enabled | |
424 | * @predisable: [DRIVER] function to run prior to marking buffer | |
425 | * disabled | |
426 | * @postdisable: [DRIVER] function to run after marking buffer disabled | |
939546d1 LPC |
427 | * @validate_scan_mask: [DRIVER] function callback to check whether a given |
428 | * scan mask is valid for the device. | |
1612244f JC |
429 | */ |
430 | struct iio_buffer_setup_ops { | |
99698b45 PM |
431 | int (*preenable)(struct iio_dev *); |
432 | int (*postenable)(struct iio_dev *); | |
433 | int (*predisable)(struct iio_dev *); | |
434 | int (*postdisable)(struct iio_dev *); | |
939546d1 LPC |
435 | bool (*validate_scan_mask)(struct iio_dev *indio_dev, |
436 | const unsigned long *scan_mask); | |
1612244f JC |
437 | }; |
438 | ||
847ec80b JC |
439 | /** |
440 | * struct iio_dev - industrial I/O device | |
441 | * @id: [INTERN] used to identify device internally | |
847ec80b JC |
442 | * @modes: [DRIVER] operating modes supported by device |
443 | * @currentmode: [DRIVER] current operating mode | |
444 | * @dev: [DRIVER] device structure, should be assigned a parent | |
445 | * and owner | |
5aa96188 | 446 | * @event_interface: [INTERN] event chrdevs associated with interrupt lines |
14555b14 | 447 | * @buffer: [DRIVER] any buffer present |
84b36ce5 | 448 | * @buffer_list: [INTERN] list of all buffers currently attached |
420fe2e9 | 449 | * @scan_bytes: [INTERN] num bytes captured to be fed to buffer demux |
847ec80b JC |
450 | * @mlock: [INTERN] lock used to prevent simultaneous device state |
451 | * changes | |
e5c003ae | 452 | * @available_scan_masks: [DRIVER] optional array of allowed bitmasks |
32b5eeca JC |
453 | * @masklength: [INTERN] the length of the mask established from |
454 | * channels | |
959d2952 | 455 | * @active_scan_mask: [INTERN] union of all scan masks requested by buffers |
fd6487f8 | 456 | * @scan_timestamp: [INTERN] set if any buffers have requested timestamp |
f1264809 | 457 | * @scan_index_timestamp:[INTERN] cache of the index to the timestamp |
14555b14 | 458 | * @trig: [INTERN] current device trigger (buffer modes) |
25985edc | 459 | * @pollfunc: [DRIVER] function run on trigger being received |
1d892719 | 460 | * @channels: [DRIVER] channel specification structure table |
17879488 | 461 | * @num_channels: [DRIVER] number of channels specified in @channels. |
1d892719 | 462 | * @channel_attr_list: [INTERN] keep track of automatically created channel |
1a25e592 | 463 | * attributes |
26d25ae3 | 464 | * @chan_attr_group: [INTERN] group for all attrs in base directory |
1d892719 | 465 | * @name: [DRIVER] name of the device. |
1a25e592 | 466 | * @info: [DRIVER] callbacks and constant info from driver |
ac917a81 | 467 | * @info_exist_lock: [INTERN] lock to prevent use during removal |
ecbf20ca JC |
468 | * @setup_ops: [DRIVER] callbacks to call before and after buffer |
469 | * enable/disable | |
1a25e592 | 470 | * @chrdev: [INTERN] associated character device |
26d25ae3 JC |
471 | * @groups: [INTERN] attribute groups |
472 | * @groupcounter: [INTERN] index of next attribute group | |
bb01443e | 473 | * @flags: [INTERN] file ops related flags including busy flag. |
e553f182 MH |
474 | * @debugfs_dentry: [INTERN] device specific debugfs dentry. |
475 | * @cached_reg_addr: [INTERN] cached register address for debugfs reads. | |
476 | */ | |
847ec80b JC |
477 | struct iio_dev { |
478 | int id; | |
4024bc73 | 479 | |
847ec80b JC |
480 | int modes; |
481 | int currentmode; | |
482 | struct device dev; | |
847ec80b | 483 | |
5aa96188 | 484 | struct iio_event_interface *event_interface; |
847ec80b | 485 | |
14555b14 | 486 | struct iio_buffer *buffer; |
84b36ce5 | 487 | struct list_head buffer_list; |
420fe2e9 | 488 | int scan_bytes; |
847ec80b JC |
489 | struct mutex mlock; |
490 | ||
cd4361c7 | 491 | const unsigned long *available_scan_masks; |
32b5eeca | 492 | unsigned masklength; |
cd4361c7 | 493 | const unsigned long *active_scan_mask; |
fd6487f8 | 494 | bool scan_timestamp; |
f1264809 | 495 | unsigned scan_index_timestamp; |
847ec80b JC |
496 | struct iio_trigger *trig; |
497 | struct iio_poll_func *pollfunc; | |
1d892719 | 498 | |
1a25e592 JC |
499 | struct iio_chan_spec const *channels; |
500 | int num_channels; | |
1d892719 | 501 | |
1a25e592 | 502 | struct list_head channel_attr_list; |
26d25ae3 | 503 | struct attribute_group chan_attr_group; |
1a25e592 JC |
504 | const char *name; |
505 | const struct iio_info *info; | |
ac917a81 | 506 | struct mutex info_exist_lock; |
1612244f | 507 | const struct iio_buffer_setup_ops *setup_ops; |
1a25e592 | 508 | struct cdev chrdev; |
26d25ae3 JC |
509 | #define IIO_MAX_GROUPS 6 |
510 | const struct attribute_group *groups[IIO_MAX_GROUPS + 1]; | |
511 | int groupcounter; | |
bb01443e LPC |
512 | |
513 | unsigned long flags; | |
e553f182 MH |
514 | #if defined(CONFIG_DEBUG_FS) |
515 | struct dentry *debugfs_dentry; | |
516 | unsigned cached_reg_addr; | |
517 | #endif | |
847ec80b JC |
518 | }; |
519 | ||
5fb21c82 JC |
520 | const struct iio_chan_spec |
521 | *iio_find_channel_from_si(struct iio_dev *indio_dev, int si); | |
f8c6f4e9 | 522 | int iio_device_register(struct iio_dev *indio_dev); |
f8c6f4e9 | 523 | void iio_device_unregister(struct iio_dev *indio_dev); |
8caa07c0 SK |
524 | int devm_iio_device_register(struct device *dev, struct iio_dev *indio_dev); |
525 | void devm_iio_device_unregister(struct device *dev, struct iio_dev *indio_dev); | |
f8c6f4e9 | 526 | int iio_push_event(struct iio_dev *indio_dev, u64 ev_code, s64 timestamp); |
847ec80b | 527 | |
5aaaeba8 | 528 | extern struct bus_type iio_bus_type; |
847ec80b JC |
529 | |
530 | /** | |
7cbb7537 | 531 | * iio_device_put() - reference counted deallocation of struct device |
7dcd7b60 | 532 | * @indio_dev: IIO device structure containing the device |
847ec80b | 533 | **/ |
7cbb7537 | 534 | static inline void iio_device_put(struct iio_dev *indio_dev) |
847ec80b | 535 | { |
f8c6f4e9 JC |
536 | if (indio_dev) |
537 | put_device(&indio_dev->dev); | |
6898eb89 | 538 | } |
847ec80b | 539 | |
7a7913f1 LPC |
540 | /** |
541 | * dev_to_iio_dev() - Get IIO device struct from a device struct | |
7dcd7b60 | 542 | * @dev: The device embedded in the IIO device |
7a7913f1 LPC |
543 | * |
544 | * Note: The device must be a IIO device, otherwise the result is undefined. | |
545 | */ | |
546 | static inline struct iio_dev *dev_to_iio_dev(struct device *dev) | |
547 | { | |
548 | return container_of(dev, struct iio_dev, dev); | |
549 | } | |
550 | ||
e4e8b776 LPC |
551 | /** |
552 | * iio_device_get() - increment reference count for the device | |
7dcd7b60 | 553 | * @indio_dev: IIO device structure |
e4e8b776 LPC |
554 | * |
555 | * Returns: The passed IIO device | |
556 | **/ | |
557 | static inline struct iio_dev *iio_device_get(struct iio_dev *indio_dev) | |
558 | { | |
559 | return indio_dev ? dev_to_iio_dev(get_device(&indio_dev->dev)) : NULL; | |
560 | } | |
561 | ||
2d66f389 LPC |
562 | |
563 | /** | |
564 | * iio_device_set_drvdata() - Set device driver data | |
565 | * @indio_dev: IIO device structure | |
566 | * @data: Driver specific data | |
567 | * | |
568 | * Allows to attach an arbitrary pointer to an IIO device, which can later be | |
569 | * retrieved by iio_device_get_drvdata(). | |
570 | */ | |
571 | static inline void iio_device_set_drvdata(struct iio_dev *indio_dev, void *data) | |
572 | { | |
573 | dev_set_drvdata(&indio_dev->dev, data); | |
574 | } | |
575 | ||
576 | /** | |
577 | * iio_device_get_drvdata() - Get device driver data | |
578 | * @indio_dev: IIO device structure | |
579 | * | |
580 | * Returns the data previously set with iio_device_set_drvdata() | |
581 | */ | |
582 | static inline void *iio_device_get_drvdata(struct iio_dev *indio_dev) | |
583 | { | |
584 | return dev_get_drvdata(&indio_dev->dev); | |
585 | } | |
586 | ||
6f7c8ee5 JC |
587 | /* Can we make this smaller? */ |
588 | #define IIO_ALIGN L1_CACHE_BYTES | |
7cbb7537 | 589 | struct iio_dev *iio_device_alloc(int sizeof_priv); |
6f7c8ee5 | 590 | |
f8c6f4e9 | 591 | static inline void *iio_priv(const struct iio_dev *indio_dev) |
6f7c8ee5 | 592 | { |
f8c6f4e9 | 593 | return (char *)indio_dev + ALIGN(sizeof(struct iio_dev), IIO_ALIGN); |
6f7c8ee5 JC |
594 | } |
595 | ||
596 | static inline struct iio_dev *iio_priv_to_dev(void *priv) | |
597 | { | |
598 | return (struct iio_dev *)((char *)priv - | |
599 | ALIGN(sizeof(struct iio_dev), IIO_ALIGN)); | |
600 | } | |
847ec80b | 601 | |
7cbb7537 | 602 | void iio_device_free(struct iio_dev *indio_dev); |
9dabaf5e | 603 | struct iio_dev *devm_iio_device_alloc(struct device *dev, int sizeof_priv); |
9bc54102 | 604 | void devm_iio_device_free(struct device *dev, struct iio_dev *indio_dev); |
d536321d JA |
605 | struct iio_trigger *devm_iio_trigger_alloc(struct device *dev, |
606 | const char *fmt, ...); | |
d536321d JA |
607 | void devm_iio_trigger_free(struct device *dev, struct iio_trigger *iio_trig); |
608 | ||
847ec80b | 609 | /** |
14555b14 | 610 | * iio_buffer_enabled() - helper function to test if the buffer is enabled |
7dcd7b60 | 611 | * @indio_dev: IIO device structure for device |
847ec80b | 612 | **/ |
f8c6f4e9 | 613 | static inline bool iio_buffer_enabled(struct iio_dev *indio_dev) |
847ec80b | 614 | { |
f8c6f4e9 | 615 | return indio_dev->currentmode |
03af03ad KW |
616 | & (INDIO_BUFFER_TRIGGERED | INDIO_BUFFER_HARDWARE | |
617 | INDIO_BUFFER_SOFTWARE); | |
6898eb89 | 618 | } |
847ec80b | 619 | |
e553f182 MH |
620 | /** |
621 | * iio_get_debugfs_dentry() - helper function to get the debugfs_dentry | |
7dcd7b60 | 622 | * @indio_dev: IIO device structure for device |
e553f182 MH |
623 | **/ |
624 | #if defined(CONFIG_DEBUG_FS) | |
625 | static inline struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev) | |
626 | { | |
627 | return indio_dev->debugfs_dentry; | |
6898eb89 | 628 | } |
e553f182 MH |
629 | #else |
630 | static inline struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev) | |
631 | { | |
632 | return NULL; | |
6898eb89 | 633 | } |
e553f182 MH |
634 | #endif |
635 | ||
6807d721 LPC |
636 | int iio_str_to_fixpoint(const char *str, int fract_mult, int *integer, |
637 | int *fract); | |
638 | ||
9dbf8ccd LPC |
639 | /** |
640 | * IIO_DEGREE_TO_RAD() - Convert degree to rad | |
641 | * @deg: A value in degree | |
642 | * | |
643 | * Returns the given value converted from degree to rad | |
644 | */ | |
645 | #define IIO_DEGREE_TO_RAD(deg) (((deg) * 314159ULL + 9000000ULL) / 18000000ULL) | |
646 | ||
647 | /** | |
648 | * IIO_G_TO_M_S_2() - Convert g to meter / second**2 | |
649 | * @g: A value in g | |
650 | * | |
651 | * Returns the given value converted from g to meter / second**2 | |
652 | */ | |
653 | #define IIO_G_TO_M_S_2(g) ((g) * 980665ULL / 100000ULL) | |
654 | ||
847ec80b | 655 | #endif /* _INDUSTRIAL_IO_H_ */ |