1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* Industrialio event test code. |
3 | * |
4 | * Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de> |
5 | * |
6 | * This program is primarily intended as an example application. |
7 | * Reads the current buffer setup from sysfs and starts a short capture |
8 | * from the specified device, pretty printing the result after appropriate |
9 | * conversion. |
10 | * |
11 | * Usage: |
12 | * iio_event_monitor <device_name> |
13 | */ |
14 | |
15 | #include <unistd.h> |
16 | #include <stdlib.h> |
17 | #include <dirent.h> |
18 | #include <stdbool.h> |
19 | #include <stdio.h> |
20 | #include <errno.h> |
21 | #include <string.h> |
22 | #include <poll.h> |
23 | #include <fcntl.h> |
24 | #include <sys/ioctl.h> |
25 | #include "iio_utils.h" |
26 | #include <linux/iio/events.h> |
27 | #include <linux/iio/types.h> |
28 | |
29 | static const char * const iio_chan_type_name_spec[] = { |
30 | [IIO_VOLTAGE] = "voltage" , |
31 | [IIO_CURRENT] = "current" , |
32 | [IIO_POWER] = "power" , |
33 | [IIO_ACCEL] = "accel" , |
34 | [IIO_ANGL_VEL] = "anglvel" , |
35 | [IIO_MAGN] = "magn" , |
36 | [IIO_LIGHT] = "illuminance" , |
37 | [IIO_INTENSITY] = "intensity" , |
38 | [IIO_PROXIMITY] = "proximity" , |
39 | [IIO_TEMP] = "temp" , |
40 | [IIO_INCLI] = "incli" , |
41 | [IIO_ROT] = "rot" , |
42 | [IIO_ANGL] = "angl" , |
43 | [IIO_TIMESTAMP] = "timestamp" , |
44 | [IIO_CAPACITANCE] = "capacitance" , |
45 | [IIO_ALTVOLTAGE] = "altvoltage" , |
46 | [IIO_CCT] = "cct" , |
47 | [IIO_PRESSURE] = "pressure" , |
48 | [IIO_HUMIDITYRELATIVE] = "humidityrelative" , |
49 | [IIO_ACTIVITY] = "activity" , |
50 | [IIO_STEPS] = "steps" , |
51 | [IIO_ENERGY] = "energy" , |
52 | [IIO_DISTANCE] = "distance" , |
53 | [IIO_VELOCITY] = "velocity" , |
54 | [IIO_CONCENTRATION] = "concentration" , |
55 | [IIO_RESISTANCE] = "resistance" , |
56 | [IIO_PH] = "ph" , |
57 | [IIO_UVINDEX] = "uvindex" , |
58 | [IIO_GRAVITY] = "gravity" , |
59 | [IIO_POSITIONRELATIVE] = "positionrelative" , |
60 | [IIO_PHASE] = "phase" , |
61 | [IIO_MASSCONCENTRATION] = "massconcentration" , |
62 | [IIO_DELTA_ANGL] = "deltaangl" , |
63 | [IIO_DELTA_VELOCITY] = "deltavelocity" , |
64 | [IIO_COLORTEMP] = "colortemp" , |
65 | [IIO_CHROMATICITY] = "chromaticity" , |
66 | }; |
67 | |
68 | static const char * const iio_ev_type_text[] = { |
69 | [IIO_EV_TYPE_THRESH] = "thresh" , |
70 | [IIO_EV_TYPE_MAG] = "mag" , |
71 | [IIO_EV_TYPE_ROC] = "roc" , |
72 | [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive" , |
73 | [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive" , |
74 | [IIO_EV_TYPE_CHANGE] = "change" , |
75 | [IIO_EV_TYPE_MAG_REFERENCED] = "mag_referenced" , |
76 | [IIO_EV_TYPE_GESTURE] = "gesture" , |
77 | }; |
78 | |
79 | static const char * const iio_ev_dir_text[] = { |
80 | [IIO_EV_DIR_EITHER] = "either" , |
81 | [IIO_EV_DIR_RISING] = "rising" , |
82 | [IIO_EV_DIR_FALLING] = "falling" , |
83 | [IIO_EV_DIR_SINGLETAP] = "singletap" , |
84 | [IIO_EV_DIR_DOUBLETAP] = "doubletap" , |
85 | }; |
86 | |
87 | static const char * const iio_modifier_names[] = { |
88 | [IIO_MOD_X] = "x" , |
89 | [IIO_MOD_Y] = "y" , |
90 | [IIO_MOD_Z] = "z" , |
91 | [IIO_MOD_X_AND_Y] = "x&y" , |
92 | [IIO_MOD_X_AND_Z] = "x&z" , |
93 | [IIO_MOD_Y_AND_Z] = "y&z" , |
94 | [IIO_MOD_X_AND_Y_AND_Z] = "x&y&z" , |
95 | [IIO_MOD_X_OR_Y] = "x|y" , |
96 | [IIO_MOD_X_OR_Z] = "x|z" , |
97 | [IIO_MOD_Y_OR_Z] = "y|z" , |
98 | [IIO_MOD_X_OR_Y_OR_Z] = "x|y|z" , |
99 | [IIO_MOD_LIGHT_BOTH] = "both" , |
100 | [IIO_MOD_LIGHT_IR] = "ir" , |
101 | [IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)" , |
102 | [IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2" , |
103 | [IIO_MOD_LIGHT_CLEAR] = "clear" , |
104 | [IIO_MOD_LIGHT_RED] = "red" , |
105 | [IIO_MOD_LIGHT_GREEN] = "green" , |
106 | [IIO_MOD_LIGHT_BLUE] = "blue" , |
107 | [IIO_MOD_LIGHT_UV] = "uv" , |
108 | [IIO_MOD_LIGHT_DUV] = "duv" , |
109 | [IIO_MOD_QUATERNION] = "quaternion" , |
110 | [IIO_MOD_TEMP_AMBIENT] = "ambient" , |
111 | [IIO_MOD_TEMP_OBJECT] = "object" , |
112 | [IIO_MOD_NORTH_MAGN] = "from_north_magnetic" , |
113 | [IIO_MOD_NORTH_TRUE] = "from_north_true" , |
114 | [IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp" , |
115 | [IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp" , |
116 | [IIO_MOD_RUNNING] = "running" , |
117 | [IIO_MOD_JOGGING] = "jogging" , |
118 | [IIO_MOD_WALKING] = "walking" , |
119 | [IIO_MOD_STILL] = "still" , |
120 | [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)" , |
121 | [IIO_MOD_I] = "i" , |
122 | [IIO_MOD_Q] = "q" , |
123 | [IIO_MOD_CO2] = "co2" , |
124 | [IIO_MOD_ETHANOL] = "ethanol" , |
125 | [IIO_MOD_H2] = "h2" , |
126 | [IIO_MOD_VOC] = "voc" , |
127 | [IIO_MOD_PM1] = "pm1" , |
128 | [IIO_MOD_PM2P5] = "pm2p5" , |
129 | [IIO_MOD_PM4] = "pm4" , |
130 | [IIO_MOD_PM10] = "pm10" , |
131 | [IIO_MOD_O2] = "o2" , |
132 | [IIO_MOD_LINEAR_X] = "linear_x" , |
133 | [IIO_MOD_LINEAR_Y] = "linear_y" , |
134 | [IIO_MOD_LINEAR_Z] = "linear_z" , |
135 | [IIO_MOD_PITCH] = "pitch" , |
136 | [IIO_MOD_YAW] = "yaw" , |
137 | [IIO_MOD_ROLL] = "roll" , |
138 | }; |
139 | |
140 | static bool event_is_known(struct iio_event_data *event) |
141 | { |
142 | enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id); |
143 | enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id); |
144 | enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id); |
145 | enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id); |
146 | |
147 | switch (type) { |
148 | case IIO_VOLTAGE: |
149 | case IIO_CURRENT: |
150 | case IIO_POWER: |
151 | case IIO_ACCEL: |
152 | case IIO_ANGL_VEL: |
153 | case IIO_MAGN: |
154 | case IIO_LIGHT: |
155 | case IIO_INTENSITY: |
156 | case IIO_PROXIMITY: |
157 | case IIO_TEMP: |
158 | case IIO_INCLI: |
159 | case IIO_ROT: |
160 | case IIO_ANGL: |
161 | case IIO_TIMESTAMP: |
162 | case IIO_CAPACITANCE: |
163 | case IIO_ALTVOLTAGE: |
164 | case IIO_CCT: |
165 | case IIO_PRESSURE: |
166 | case IIO_HUMIDITYRELATIVE: |
167 | case IIO_ACTIVITY: |
168 | case IIO_STEPS: |
169 | case IIO_ENERGY: |
170 | case IIO_DISTANCE: |
171 | case IIO_VELOCITY: |
172 | case IIO_CONCENTRATION: |
173 | case IIO_RESISTANCE: |
174 | case IIO_PH: |
175 | case IIO_UVINDEX: |
176 | case IIO_GRAVITY: |
177 | case IIO_POSITIONRELATIVE: |
178 | case IIO_PHASE: |
179 | case IIO_MASSCONCENTRATION: |
180 | case IIO_DELTA_ANGL: |
181 | case IIO_DELTA_VELOCITY: |
182 | case IIO_COLORTEMP: |
183 | case IIO_CHROMATICITY: |
184 | break; |
185 | default: |
186 | return false; |
187 | } |
188 | |
189 | switch (mod) { |
190 | case IIO_NO_MOD: |
191 | case IIO_MOD_X: |
192 | case IIO_MOD_Y: |
193 | case IIO_MOD_Z: |
194 | case IIO_MOD_X_AND_Y: |
195 | case IIO_MOD_X_AND_Z: |
196 | case IIO_MOD_Y_AND_Z: |
197 | case IIO_MOD_X_AND_Y_AND_Z: |
198 | case IIO_MOD_X_OR_Y: |
199 | case IIO_MOD_X_OR_Z: |
200 | case IIO_MOD_Y_OR_Z: |
201 | case IIO_MOD_X_OR_Y_OR_Z: |
202 | case IIO_MOD_LIGHT_BOTH: |
203 | case IIO_MOD_LIGHT_IR: |
204 | case IIO_MOD_ROOT_SUM_SQUARED_X_Y: |
205 | case IIO_MOD_SUM_SQUARED_X_Y_Z: |
206 | case IIO_MOD_LIGHT_CLEAR: |
207 | case IIO_MOD_LIGHT_RED: |
208 | case IIO_MOD_LIGHT_GREEN: |
209 | case IIO_MOD_LIGHT_BLUE: |
210 | case IIO_MOD_LIGHT_UV: |
211 | case IIO_MOD_LIGHT_DUV: |
212 | case IIO_MOD_QUATERNION: |
213 | case IIO_MOD_TEMP_AMBIENT: |
214 | case IIO_MOD_TEMP_OBJECT: |
215 | case IIO_MOD_NORTH_MAGN: |
216 | case IIO_MOD_NORTH_TRUE: |
217 | case IIO_MOD_NORTH_MAGN_TILT_COMP: |
218 | case IIO_MOD_NORTH_TRUE_TILT_COMP: |
219 | case IIO_MOD_RUNNING: |
220 | case IIO_MOD_JOGGING: |
221 | case IIO_MOD_WALKING: |
222 | case IIO_MOD_STILL: |
223 | case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z: |
224 | case IIO_MOD_I: |
225 | case IIO_MOD_Q: |
226 | case IIO_MOD_CO2: |
227 | case IIO_MOD_ETHANOL: |
228 | case IIO_MOD_H2: |
229 | case IIO_MOD_VOC: |
230 | case IIO_MOD_PM1: |
231 | case IIO_MOD_PM2P5: |
232 | case IIO_MOD_PM4: |
233 | case IIO_MOD_PM10: |
234 | case IIO_MOD_O2: |
235 | break; |
236 | default: |
237 | return false; |
238 | } |
239 | |
240 | switch (ev_type) { |
241 | case IIO_EV_TYPE_THRESH: |
242 | case IIO_EV_TYPE_MAG: |
243 | case IIO_EV_TYPE_ROC: |
244 | case IIO_EV_TYPE_THRESH_ADAPTIVE: |
245 | case IIO_EV_TYPE_MAG_ADAPTIVE: |
246 | case IIO_EV_TYPE_CHANGE: |
247 | case IIO_EV_TYPE_GESTURE: |
248 | break; |
249 | default: |
250 | return false; |
251 | } |
252 | |
253 | switch (dir) { |
254 | case IIO_EV_DIR_EITHER: |
255 | case IIO_EV_DIR_RISING: |
256 | case IIO_EV_DIR_FALLING: |
257 | case IIO_EV_DIR_SINGLETAP: |
258 | case IIO_EV_DIR_DOUBLETAP: |
259 | case IIO_EV_DIR_NONE: |
260 | break; |
261 | default: |
262 | return false; |
263 | } |
264 | |
265 | return true; |
266 | } |
267 | |
268 | static void print_event(struct iio_event_data *event) |
269 | { |
270 | enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id); |
271 | enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id); |
272 | enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id); |
273 | enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id); |
274 | int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id); |
275 | int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id); |
276 | bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id); |
277 | |
278 | if (!event_is_known(event)) { |
279 | fprintf(stderr, "Unknown event: time: %lld, id: %llx\n" , |
280 | event->timestamp, event->id); |
281 | |
282 | return; |
283 | } |
284 | |
285 | printf("Event: time: %lld, type: %s" , event->timestamp, |
286 | iio_chan_type_name_spec[type]); |
287 | |
288 | if (mod != IIO_NO_MOD) |
289 | printf("(%s)" , iio_modifier_names[mod]); |
290 | |
291 | if (chan >= 0) { |
292 | printf(", channel: %d" , chan); |
293 | if (diff && chan2 >= 0) |
294 | printf("-%d" , chan2); |
295 | } |
296 | |
297 | printf(", evtype: %s" , iio_ev_type_text[ev_type]); |
298 | |
299 | if (dir != IIO_EV_DIR_NONE) |
300 | printf(", direction: %s" , iio_ev_dir_text[dir]); |
301 | |
302 | printf("\n" ); |
303 | fflush(stdout); |
304 | } |
305 | |
306 | /* Enable or disable events in sysfs if the knob is available */ |
307 | static void enable_events(char *dev_dir, int enable) |
308 | { |
309 | const struct dirent *ent; |
310 | char evdir[256]; |
311 | int ret; |
312 | DIR *dp; |
313 | |
314 | snprintf(evdir, sizeof(evdir), FORMAT_EVENTS_DIR, dev_dir); |
315 | evdir[sizeof(evdir)-1] = '\0'; |
316 | |
317 | dp = opendir(evdir); |
318 | if (!dp) { |
319 | fprintf(stderr, "Enabling/disabling events: can't open %s\n" , |
320 | evdir); |
321 | return; |
322 | } |
323 | |
324 | while (ent = readdir(dp), ent) { |
325 | if (iioutils_check_suffix(str: ent->d_name, suffix: "_en" )) { |
326 | printf("%sabling: %s\n" , |
327 | enable ? "En" : "Dis" , |
328 | ent->d_name); |
329 | ret = write_sysfs_int(filename: ent->d_name, basedir: evdir, |
330 | val: enable); |
331 | if (ret < 0) |
332 | fprintf(stderr, "Failed to enable/disable %s\n" , |
333 | ent->d_name); |
334 | } |
335 | } |
336 | |
337 | if (closedir(dp) == -1) { |
338 | perror("Enabling/disabling channels: " |
339 | "Failed to close directory" ); |
340 | return; |
341 | } |
342 | } |
343 | |
344 | int main(int argc, char **argv) |
345 | { |
346 | struct iio_event_data event; |
347 | const char *device_name; |
348 | char *dev_dir_name = NULL; |
349 | char *chrdev_name; |
350 | int ret; |
351 | int dev_num; |
352 | int fd, event_fd; |
353 | bool all_events = false; |
354 | |
355 | if (argc == 2) { |
356 | device_name = argv[1]; |
357 | } else if (argc == 3) { |
358 | device_name = argv[2]; |
359 | if (!strcmp(argv[1], "-a" )) |
360 | all_events = true; |
361 | } else { |
362 | fprintf(stderr, |
363 | "Usage: iio_event_monitor [options] <device_name>\n" |
364 | "Listen and display events from IIO devices\n" |
365 | " -a Auto-activate all available events\n" ); |
366 | return -1; |
367 | } |
368 | |
369 | dev_num = find_type_by_name(name: device_name, type: "iio:device" ); |
370 | if (dev_num >= 0) { |
371 | printf("Found IIO device with name %s with device number %d\n" , |
372 | device_name, dev_num); |
373 | ret = asprintf(&chrdev_name, "/dev/iio:device%d" , dev_num); |
374 | if (ret < 0) |
375 | return -ENOMEM; |
376 | /* Look up sysfs dir as well if we can */ |
377 | ret = asprintf(&dev_dir_name, "%siio:device%d" , iio_dir, dev_num); |
378 | if (ret < 0) |
379 | return -ENOMEM; |
380 | } else { |
381 | /* |
382 | * If we can't find an IIO device by name assume device_name is |
383 | * an IIO chrdev |
384 | */ |
385 | chrdev_name = strdup(device_name); |
386 | if (!chrdev_name) |
387 | return -ENOMEM; |
388 | } |
389 | |
390 | if (all_events && dev_dir_name) |
391 | enable_events(dev_dir: dev_dir_name, enable: 1); |
392 | |
393 | fd = open(chrdev_name, 0); |
394 | if (fd == -1) { |
395 | ret = -errno; |
396 | fprintf(stderr, "Failed to open %s\n" , chrdev_name); |
397 | goto error_free_chrdev_name; |
398 | } |
399 | |
400 | ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd); |
401 | if (ret == -1 || event_fd == -1) { |
402 | ret = -errno; |
403 | if (ret == -ENODEV) |
404 | fprintf(stderr, |
405 | "This device does not support events\n" ); |
406 | else |
407 | fprintf(stderr, "Failed to retrieve event fd\n" ); |
408 | if (close(fd) == -1) |
409 | perror("Failed to close character device file" ); |
410 | |
411 | goto error_free_chrdev_name; |
412 | } |
413 | |
414 | if (close(fd) == -1) { |
415 | ret = -errno; |
416 | goto error_free_chrdev_name; |
417 | } |
418 | |
419 | while (true) { |
420 | ret = read(event_fd, &event, sizeof(event)); |
421 | if (ret == -1) { |
422 | if (errno == EAGAIN) { |
423 | fprintf(stderr, "nothing available\n" ); |
424 | continue; |
425 | } else { |
426 | ret = -errno; |
427 | perror("Failed to read event from device" ); |
428 | break; |
429 | } |
430 | } |
431 | |
432 | if (ret != sizeof(event)) { |
433 | fprintf(stderr, "Reading event failed!\n" ); |
434 | ret = -EIO; |
435 | break; |
436 | } |
437 | |
438 | print_event(event: &event); |
439 | } |
440 | |
441 | if (close(event_fd) == -1) |
442 | perror("Failed to close event file" ); |
443 | |
444 | error_free_chrdev_name: |
445 | /* Disable events after use */ |
446 | if (all_events && dev_dir_name) |
447 | enable_events(dev_dir: dev_dir_name, enable: 0); |
448 | |
449 | free(chrdev_name); |
450 | |
451 | return ret; |
452 | } |
453 | |