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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> |
847ec80b | 16 | /* IIO TODO LIST */ |
751a3700 | 17 | /* |
847ec80b JC |
18 | * Provide means of adjusting timer accuracy. |
19 | * Currently assumes nano seconds. | |
20 | */ | |
21 | ||
1d892719 | 22 | enum iio_chan_info_enum { |
5ccb3adb JC |
23 | IIO_CHAN_INFO_RAW = 0, |
24 | IIO_CHAN_INFO_PROCESSED, | |
25 | IIO_CHAN_INFO_SCALE, | |
c8a9f805 JC |
26 | IIO_CHAN_INFO_OFFSET, |
27 | IIO_CHAN_INFO_CALIBSCALE, | |
28 | IIO_CHAN_INFO_CALIBBIAS, | |
29 | IIO_CHAN_INFO_PEAK, | |
30 | IIO_CHAN_INFO_PEAK_SCALE, | |
31 | IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW, | |
32 | IIO_CHAN_INFO_AVERAGE_RAW, | |
df94aba8 | 33 | IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY, |
ce85a1cb | 34 | IIO_CHAN_INFO_SAMP_FREQ, |
a6b12855 MH |
35 | IIO_CHAN_INFO_FREQUENCY, |
36 | IIO_CHAN_INFO_PHASE, | |
1d892719 JC |
37 | }; |
38 | ||
c8a9f805 JC |
39 | #define IIO_CHAN_INFO_SHARED_BIT(type) BIT(type*2) |
40 | #define IIO_CHAN_INFO_SEPARATE_BIT(type) BIT(type*2 + 1) | |
41 | ||
5ccb3adb JC |
42 | #define IIO_CHAN_INFO_RAW_SEPARATE_BIT \ |
43 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_RAW) | |
44 | #define IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT \ | |
45 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_PROCESSED) | |
c8a9f805 JC |
46 | #define IIO_CHAN_INFO_SCALE_SEPARATE_BIT \ |
47 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_SCALE) | |
48 | #define IIO_CHAN_INFO_SCALE_SHARED_BIT \ | |
49 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_SCALE) | |
50 | #define IIO_CHAN_INFO_OFFSET_SEPARATE_BIT \ | |
51 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_OFFSET) | |
52 | #define IIO_CHAN_INFO_OFFSET_SHARED_BIT \ | |
53 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_OFFSET) | |
54 | #define IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT \ | |
55 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_CALIBSCALE) | |
56 | #define IIO_CHAN_INFO_CALIBSCALE_SHARED_BIT \ | |
57 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_CALIBSCALE) | |
58 | #define IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT \ | |
59 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_CALIBBIAS) | |
60 | #define IIO_CHAN_INFO_CALIBBIAS_SHARED_BIT \ | |
61 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_CALIBBIAS) | |
62 | #define IIO_CHAN_INFO_PEAK_SEPARATE_BIT \ | |
63 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_PEAK) | |
64 | #define IIO_CHAN_INFO_PEAK_SHARED_BIT \ | |
65 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_PEAK) | |
66 | #define IIO_CHAN_INFO_PEAKSCALE_SEPARATE_BIT \ | |
67 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_PEAKSCALE) | |
68 | #define IIO_CHAN_INFO_PEAKSCALE_SHARED_BIT \ | |
69 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_PEAKSCALE) | |
70 | #define IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SEPARATE_BIT \ | |
71 | IIO_CHAN_INFO_SEPARATE_BIT( \ | |
72 | IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW) | |
73 | #define IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SHARED_BIT \ | |
74 | IIO_CHAN_INFO_SHARED_BIT( \ | |
75 | IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW) | |
76 | #define IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE_BIT \ | |
77 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_AVERAGE_RAW) | |
78 | #define IIO_CHAN_INFO_AVERAGE_RAW_SHARED_BIT \ | |
79 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_AVERAGE_RAW) | |
df94aba8 JC |
80 | #define IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT \ |
81 | IIO_CHAN_INFO_SHARED_BIT( \ | |
82 | IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | |
83 | #define IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SEPARATE_BIT \ | |
84 | IIO_CHAN_INFO_SEPARATE_BIT( \ | |
85 | IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | |
ce85a1cb LD |
86 | #define IIO_CHAN_INFO_SAMP_FREQ_SEPARATE_BIT \ |
87 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
88 | #define IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT \ | |
89 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
a6b12855 MH |
90 | #define IIO_CHAN_INFO_FREQUENCY_SEPARATE_BIT \ |
91 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_FREQUENCY) | |
92 | #define IIO_CHAN_INFO_FREQUENCY_SHARED_BIT \ | |
93 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_FREQUENCY) | |
94 | #define IIO_CHAN_INFO_PHASE_SEPARATE_BIT \ | |
95 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_PHASE) | |
96 | #define IIO_CHAN_INFO_PHASE_SHARED_BIT \ | |
97 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_PHASE) | |
c8a9f805 | 98 | |
8310b86c JC |
99 | enum iio_endian { |
100 | IIO_CPU, | |
101 | IIO_BE, | |
102 | IIO_LE, | |
103 | }; | |
104 | ||
5f420b42 LPC |
105 | struct iio_chan_spec; |
106 | struct iio_dev; | |
107 | ||
108 | /** | |
109 | * struct iio_chan_spec_ext_info - Extended channel info attribute | |
110 | * @name: Info attribute name | |
111 | * @shared: Whether this attribute is shared between all channels. | |
112 | * @read: Read callback for this info attribute, may be NULL. | |
113 | * @write: Write callback for this info attribute, may be NULL. | |
fc6d1139 | 114 | * @private: Data private to the driver. |
5f420b42 LPC |
115 | */ |
116 | struct iio_chan_spec_ext_info { | |
117 | const char *name; | |
118 | bool shared; | |
fc6d1139 MH |
119 | ssize_t (*read)(struct iio_dev *, uintptr_t private, |
120 | struct iio_chan_spec const *, char *buf); | |
121 | ssize_t (*write)(struct iio_dev *, uintptr_t private, | |
122 | struct iio_chan_spec const *, const char *buf, | |
123 | size_t len); | |
124 | uintptr_t private; | |
5f420b42 LPC |
125 | }; |
126 | ||
1d892719 JC |
127 | /** |
128 | * struct iio_chan_spec - specification of a single channel | |
129 | * @type: What type of measurement is the channel making. | |
4abf6f8b | 130 | * @channel: What number or name do we wish to assign the channel. |
1d892719 JC |
131 | * @channel2: If there is a second number for a differential |
132 | * channel then this is it. If modified is set then the | |
133 | * value here specifies the modifier. | |
134 | * @address: Driver specific identifier. | |
135 | * @scan_index: Monotonic index to give ordering in scans when read | |
136 | * from a buffer. | |
137 | * @scan_type: Sign: 's' or 'u' to specify signed or unsigned | |
138 | * realbits: Number of valid bits of data | |
139 | * storage_bits: Realbits + padding | |
140 | * shift: Shift right by this before masking out | |
141 | * realbits. | |
8310b86c | 142 | * endianness: little or big endian |
1d892719 JC |
143 | * @info_mask: What information is to be exported about this channel. |
144 | * This includes calibbias, scale etc. | |
145 | * @event_mask: What events can this channel produce. | |
5f420b42 LPC |
146 | * @ext_info: Array of extended info attributes for this channel. |
147 | * The array is NULL terminated, the last element should | |
148 | * have it's name field set to NULL. | |
1d892719 JC |
149 | * @extend_name: Allows labeling of channel attributes with an |
150 | * informative name. Note this has no effect codes etc, | |
151 | * unlike modifiers. | |
6c63dded | 152 | * @datasheet_name: A name used in in kernel mapping of channels. It should |
4abf6f8b | 153 | * correspond to the first name that the channel is referred |
6c63dded JC |
154 | * to by in the datasheet (e.g. IND), or the nearest |
155 | * possible compound name (e.g. IND-INC). | |
1d892719 JC |
156 | * @modified: Does a modifier apply to this channel. What these are |
157 | * depends on the channel type. Modifier is set in | |
158 | * channel2. Examples are IIO_MOD_X for axial sensors about | |
159 | * the 'x' axis. | |
160 | * @indexed: Specify the channel has a numerical index. If not, | |
161 | * the value in channel will be suppressed for attribute | |
162 | * but not for event codes. Typically set it to 0 when | |
163 | * the index is false. | |
ade7ef7b | 164 | * @differential: Channel is differential. |
1d892719 JC |
165 | */ |
166 | struct iio_chan_spec { | |
167 | enum iio_chan_type type; | |
168 | int channel; | |
169 | int channel2; | |
170 | unsigned long address; | |
171 | int scan_index; | |
172 | struct { | |
173 | char sign; | |
174 | u8 realbits; | |
175 | u8 storagebits; | |
176 | u8 shift; | |
8310b86c | 177 | enum iio_endian endianness; |
1d892719 | 178 | } scan_type; |
1c5e6a3f MH |
179 | long info_mask; |
180 | long event_mask; | |
5f420b42 | 181 | const struct iio_chan_spec_ext_info *ext_info; |
344692b1 | 182 | const char *extend_name; |
6c63dded | 183 | const char *datasheet_name; |
1d892719 JC |
184 | unsigned modified:1; |
185 | unsigned indexed:1; | |
c6fc8062 | 186 | unsigned output:1; |
ade7ef7b | 187 | unsigned differential:1; |
1d892719 | 188 | }; |
df9c1c42 | 189 | |
1d892719 JC |
190 | #define IIO_ST(si, rb, sb, sh) \ |
191 | { .sign = si, .realbits = rb, .storagebits = sb, .shift = sh } | |
192 | ||
1d892719 JC |
193 | #define IIO_CHAN_SOFT_TIMESTAMP(_si) \ |
194 | { .type = IIO_TIMESTAMP, .channel = -1, \ | |
195 | .scan_index = _si, .scan_type = IIO_ST('s', 64, 64, 0) } | |
196 | ||
847ec80b JC |
197 | /** |
198 | * iio_get_time_ns() - utility function to get a time stamp for events etc | |
199 | **/ | |
200 | static inline s64 iio_get_time_ns(void) | |
201 | { | |
202 | struct timespec ts; | |
203 | /* | |
204 | * calls getnstimeofday. | |
205 | * If hrtimers then up to ns accurate, if not microsecond. | |
206 | */ | |
207 | ktime_get_real_ts(&ts); | |
208 | ||
209 | return timespec_to_ns(&ts); | |
210 | } | |
211 | ||
847ec80b JC |
212 | /* Device operating modes */ |
213 | #define INDIO_DIRECT_MODE 0x01 | |
ec3afa40 JC |
214 | #define INDIO_BUFFER_TRIGGERED 0x02 |
215 | #define INDIO_BUFFER_HARDWARE 0x08 | |
847ec80b | 216 | |
ec3afa40 JC |
217 | #define INDIO_ALL_BUFFER_MODES \ |
218 | (INDIO_BUFFER_TRIGGERED | INDIO_BUFFER_HARDWARE) | |
847ec80b | 219 | |
43a4360e | 220 | struct iio_trigger; /* forward declaration */ |
7ae8cf62 | 221 | struct iio_dev; |
43a4360e | 222 | |
6fe8135f JC |
223 | /** |
224 | * struct iio_info - constant information about device | |
225 | * @driver_module: module structure used to ensure correct | |
226 | * ownership of chrdevs etc | |
6fe8135f JC |
227 | * @event_attrs: event control attributes |
228 | * @attrs: general purpose device attributes | |
229 | * @read_raw: function to request a value from the device. | |
230 | * mask specifies which value. Note 0 means a reading of | |
231 | * the channel in question. Return value will specify the | |
232 | * type of value returned by the device. val and val2 will | |
233 | * contain the elements making up the returned value. | |
234 | * @write_raw: function to write a value to the device. | |
235 | * Parameters are the same as for read_raw. | |
5c04af04 MH |
236 | * @write_raw_get_fmt: callback function to query the expected |
237 | * format/precision. If not set by the driver, write_raw | |
238 | * returns IIO_VAL_INT_PLUS_MICRO. | |
6fe8135f JC |
239 | * @read_event_config: find out if the event is enabled. |
240 | * @write_event_config: set if the event is enabled. | |
241 | * @read_event_value: read a value associated with the event. Meaning | |
242 | * is event dependant. event_code specifies which event. | |
4abf6f8b | 243 | * @write_event_value: write the value associated with the event. |
6fe8135f | 244 | * Meaning is event dependent. |
43a4360e MH |
245 | * @validate_trigger: function to validate the trigger when the |
246 | * current trigger gets changed. | |
6fe8135f JC |
247 | **/ |
248 | struct iio_info { | |
249 | struct module *driver_module; | |
6fe8135f JC |
250 | struct attribute_group *event_attrs; |
251 | const struct attribute_group *attrs; | |
252 | ||
253 | int (*read_raw)(struct iio_dev *indio_dev, | |
254 | struct iio_chan_spec const *chan, | |
255 | int *val, | |
256 | int *val2, | |
257 | long mask); | |
258 | ||
259 | int (*write_raw)(struct iio_dev *indio_dev, | |
260 | struct iio_chan_spec const *chan, | |
261 | int val, | |
262 | int val2, | |
263 | long mask); | |
264 | ||
5c04af04 MH |
265 | int (*write_raw_get_fmt)(struct iio_dev *indio_dev, |
266 | struct iio_chan_spec const *chan, | |
267 | long mask); | |
268 | ||
6fe8135f | 269 | int (*read_event_config)(struct iio_dev *indio_dev, |
330c6c57 | 270 | u64 event_code); |
6fe8135f JC |
271 | |
272 | int (*write_event_config)(struct iio_dev *indio_dev, | |
330c6c57 | 273 | u64 event_code, |
6fe8135f JC |
274 | int state); |
275 | ||
276 | int (*read_event_value)(struct iio_dev *indio_dev, | |
330c6c57 | 277 | u64 event_code, |
6fe8135f JC |
278 | int *val); |
279 | int (*write_event_value)(struct iio_dev *indio_dev, | |
330c6c57 | 280 | u64 event_code, |
6fe8135f | 281 | int val); |
43a4360e MH |
282 | int (*validate_trigger)(struct iio_dev *indio_dev, |
283 | struct iio_trigger *trig); | |
4d5f8d3d JC |
284 | int (*update_scan_mode)(struct iio_dev *indio_dev, |
285 | const unsigned long *scan_mask); | |
e553f182 MH |
286 | int (*debugfs_reg_access)(struct iio_dev *indio_dev, |
287 | unsigned reg, unsigned writeval, | |
288 | unsigned *readval); | |
6fe8135f JC |
289 | }; |
290 | ||
1612244f JC |
291 | /** |
292 | * struct iio_buffer_setup_ops - buffer setup related callbacks | |
293 | * @preenable: [DRIVER] function to run prior to marking buffer enabled | |
294 | * @postenable: [DRIVER] function to run after marking buffer enabled | |
295 | * @predisable: [DRIVER] function to run prior to marking buffer | |
296 | * disabled | |
297 | * @postdisable: [DRIVER] function to run after marking buffer disabled | |
298 | */ | |
299 | struct iio_buffer_setup_ops { | |
300 | int (*preenable)(struct iio_dev *); | |
301 | int (*postenable)(struct iio_dev *); | |
302 | int (*predisable)(struct iio_dev *); | |
303 | int (*postdisable)(struct iio_dev *); | |
304 | }; | |
305 | ||
847ec80b JC |
306 | /** |
307 | * struct iio_dev - industrial I/O device | |
308 | * @id: [INTERN] used to identify device internally | |
847ec80b JC |
309 | * @modes: [DRIVER] operating modes supported by device |
310 | * @currentmode: [DRIVER] current operating mode | |
311 | * @dev: [DRIVER] device structure, should be assigned a parent | |
312 | * and owner | |
5aa96188 | 313 | * @event_interface: [INTERN] event chrdevs associated with interrupt lines |
14555b14 | 314 | * @buffer: [DRIVER] any buffer present |
420fe2e9 | 315 | * @scan_bytes: [INTERN] num bytes captured to be fed to buffer demux |
847ec80b JC |
316 | * @mlock: [INTERN] lock used to prevent simultaneous device state |
317 | * changes | |
e5c003ae | 318 | * @available_scan_masks: [DRIVER] optional array of allowed bitmasks |
32b5eeca JC |
319 | * @masklength: [INTERN] the length of the mask established from |
320 | * channels | |
959d2952 | 321 | * @active_scan_mask: [INTERN] union of all scan masks requested by buffers |
fd6487f8 | 322 | * @scan_timestamp: [INTERN] set if any buffers have requested timestamp |
f1264809 | 323 | * @scan_index_timestamp:[INTERN] cache of the index to the timestamp |
14555b14 | 324 | * @trig: [INTERN] current device trigger (buffer modes) |
25985edc | 325 | * @pollfunc: [DRIVER] function run on trigger being received |
1d892719 JC |
326 | * @channels: [DRIVER] channel specification structure table |
327 | * @num_channels: [DRIVER] number of chanels specified in @channels. | |
328 | * @channel_attr_list: [INTERN] keep track of automatically created channel | |
1a25e592 | 329 | * attributes |
26d25ae3 | 330 | * @chan_attr_group: [INTERN] group for all attrs in base directory |
1d892719 | 331 | * @name: [DRIVER] name of the device. |
1a25e592 | 332 | * @info: [DRIVER] callbacks and constant info from driver |
ac917a81 | 333 | * @info_exist_lock: [INTERN] lock to prevent use during removal |
ecbf20ca JC |
334 | * @setup_ops: [DRIVER] callbacks to call before and after buffer |
335 | * enable/disable | |
1a25e592 | 336 | * @chrdev: [INTERN] associated character device |
26d25ae3 JC |
337 | * @groups: [INTERN] attribute groups |
338 | * @groupcounter: [INTERN] index of next attribute group | |
bb01443e | 339 | * @flags: [INTERN] file ops related flags including busy flag. |
e553f182 MH |
340 | * @debugfs_dentry: [INTERN] device specific debugfs dentry. |
341 | * @cached_reg_addr: [INTERN] cached register address for debugfs reads. | |
342 | */ | |
847ec80b JC |
343 | struct iio_dev { |
344 | int id; | |
4024bc73 | 345 | |
847ec80b JC |
346 | int modes; |
347 | int currentmode; | |
348 | struct device dev; | |
847ec80b | 349 | |
5aa96188 | 350 | struct iio_event_interface *event_interface; |
847ec80b | 351 | |
14555b14 | 352 | struct iio_buffer *buffer; |
420fe2e9 | 353 | int scan_bytes; |
847ec80b JC |
354 | struct mutex mlock; |
355 | ||
cd4361c7 | 356 | const unsigned long *available_scan_masks; |
32b5eeca | 357 | unsigned masklength; |
cd4361c7 | 358 | const unsigned long *active_scan_mask; |
fd6487f8 | 359 | bool scan_timestamp; |
f1264809 | 360 | unsigned scan_index_timestamp; |
847ec80b JC |
361 | struct iio_trigger *trig; |
362 | struct iio_poll_func *pollfunc; | |
1d892719 | 363 | |
1a25e592 JC |
364 | struct iio_chan_spec const *channels; |
365 | int num_channels; | |
1d892719 | 366 | |
1a25e592 | 367 | struct list_head channel_attr_list; |
26d25ae3 | 368 | struct attribute_group chan_attr_group; |
1a25e592 JC |
369 | const char *name; |
370 | const struct iio_info *info; | |
ac917a81 | 371 | struct mutex info_exist_lock; |
1612244f | 372 | const struct iio_buffer_setup_ops *setup_ops; |
1a25e592 | 373 | struct cdev chrdev; |
26d25ae3 JC |
374 | #define IIO_MAX_GROUPS 6 |
375 | const struct attribute_group *groups[IIO_MAX_GROUPS + 1]; | |
376 | int groupcounter; | |
bb01443e LPC |
377 | |
378 | unsigned long flags; | |
e553f182 MH |
379 | #if defined(CONFIG_DEBUG_FS) |
380 | struct dentry *debugfs_dentry; | |
381 | unsigned cached_reg_addr; | |
382 | #endif | |
847ec80b JC |
383 | }; |
384 | ||
5fb21c82 JC |
385 | /** |
386 | * iio_find_channel_from_si() - get channel from its scan index | |
387 | * @indio_dev: device | |
388 | * @si: scan index to match | |
389 | */ | |
390 | const struct iio_chan_spec | |
391 | *iio_find_channel_from_si(struct iio_dev *indio_dev, int si); | |
392 | ||
847ec80b JC |
393 | /** |
394 | * iio_device_register() - register a device with the IIO subsystem | |
f8c6f4e9 | 395 | * @indio_dev: Device structure filled by the device driver |
847ec80b | 396 | **/ |
f8c6f4e9 | 397 | int iio_device_register(struct iio_dev *indio_dev); |
847ec80b JC |
398 | |
399 | /** | |
400 | * iio_device_unregister() - unregister a device from the IIO subsystem | |
f8c6f4e9 | 401 | * @indio_dev: Device structure representing the device. |
847ec80b | 402 | **/ |
f8c6f4e9 | 403 | void iio_device_unregister(struct iio_dev *indio_dev); |
847ec80b | 404 | |
847ec80b JC |
405 | /** |
406 | * iio_push_event() - try to add event to the list for userspace reading | |
f8c6f4e9 | 407 | * @indio_dev: IIO device structure |
847ec80b | 408 | * @ev_code: What event |
4c572605 | 409 | * @timestamp: When the event occurred |
847ec80b | 410 | **/ |
f8c6f4e9 | 411 | int iio_push_event(struct iio_dev *indio_dev, u64 ev_code, s64 timestamp); |
847ec80b | 412 | |
5aaaeba8 | 413 | extern struct bus_type iio_bus_type; |
847ec80b JC |
414 | |
415 | /** | |
7cbb7537 | 416 | * iio_device_put() - reference counted deallocation of struct device |
847ec80b JC |
417 | * @dev: the iio_device containing the device |
418 | **/ | |
7cbb7537 | 419 | static inline void iio_device_put(struct iio_dev *indio_dev) |
847ec80b | 420 | { |
f8c6f4e9 JC |
421 | if (indio_dev) |
422 | put_device(&indio_dev->dev); | |
847ec80b JC |
423 | }; |
424 | ||
6f7c8ee5 JC |
425 | /* Can we make this smaller? */ |
426 | #define IIO_ALIGN L1_CACHE_BYTES | |
847ec80b | 427 | /** |
7cbb7537 | 428 | * iio_device_alloc() - allocate an iio_dev from a driver |
6f7c8ee5 | 429 | * @sizeof_priv: Space to allocate for private structure. |
847ec80b | 430 | **/ |
7cbb7537 | 431 | struct iio_dev *iio_device_alloc(int sizeof_priv); |
6f7c8ee5 | 432 | |
f8c6f4e9 | 433 | static inline void *iio_priv(const struct iio_dev *indio_dev) |
6f7c8ee5 | 434 | { |
f8c6f4e9 | 435 | return (char *)indio_dev + ALIGN(sizeof(struct iio_dev), IIO_ALIGN); |
6f7c8ee5 JC |
436 | } |
437 | ||
438 | static inline struct iio_dev *iio_priv_to_dev(void *priv) | |
439 | { | |
440 | return (struct iio_dev *)((char *)priv - | |
441 | ALIGN(sizeof(struct iio_dev), IIO_ALIGN)); | |
442 | } | |
847ec80b JC |
443 | |
444 | /** | |
7cbb7537 | 445 | * iio_device_free() - free an iio_dev from a driver |
4c572605 | 446 | * @dev: the iio_dev associated with the device |
847ec80b | 447 | **/ |
7cbb7537 | 448 | void iio_device_free(struct iio_dev *indio_dev); |
847ec80b | 449 | |
847ec80b | 450 | /** |
14555b14 | 451 | * iio_buffer_enabled() - helper function to test if the buffer is enabled |
f8c6f4e9 | 452 | * @indio_dev: IIO device info structure for device |
847ec80b | 453 | **/ |
f8c6f4e9 | 454 | static inline bool iio_buffer_enabled(struct iio_dev *indio_dev) |
847ec80b | 455 | { |
f8c6f4e9 | 456 | return indio_dev->currentmode |
ec3afa40 | 457 | & (INDIO_BUFFER_TRIGGERED | INDIO_BUFFER_HARDWARE); |
847ec80b JC |
458 | }; |
459 | ||
e553f182 MH |
460 | /** |
461 | * iio_get_debugfs_dentry() - helper function to get the debugfs_dentry | |
462 | * @indio_dev: IIO device info structure for device | |
463 | **/ | |
464 | #if defined(CONFIG_DEBUG_FS) | |
465 | static inline struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev) | |
466 | { | |
467 | return indio_dev->debugfs_dentry; | |
468 | }; | |
469 | #else | |
470 | static inline struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev) | |
471 | { | |
472 | return NULL; | |
473 | }; | |
474 | #endif | |
475 | ||
847ec80b | 476 | #endif /* _INDUSTRIAL_IO_H_ */ |