[linux-block.git] / tools / iio / iio_event_monitor.c

// SPDX-License-Identifier: GPL-2.0-only
/* Industrialio event test code.
 *
 * Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de>
 *
 * This program is primarily intended as an example application.
 * Reads the current buffer setup from sysfs and starts a short capture
 * from the specified device, pretty printing the result after appropriate
 * conversion.
 *
 * Usage:
 *	iio_event_monitor <device_name>
 */

#include <unistd.h>
#include <stdlib.h>
#include <dirent.h>
#include <stdbool.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <poll.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include "iio_utils.h"
#include <linux/iio/events.h>
#include <linux/iio/types.h>

static const char * const iio_chan_type_name_spec[] = {
	[IIO_VOLTAGE] = "voltage",
	[IIO_CURRENT] = "current",
	[IIO_POWER] = "power",
	[IIO_ACCEL] = "accel",
	[IIO_ANGL_VEL] = "anglvel",
	[IIO_MAGN] = "magn",
	[IIO_LIGHT] = "illuminance",
	[IIO_INTENSITY] = "intensity",
	[IIO_PROXIMITY] = "proximity",
	[IIO_TEMP] = "temp",
	[IIO_INCLI] = "incli",
	[IIO_ROT] = "rot",
	[IIO_ANGL] = "angl",
	[IIO_TIMESTAMP] = "timestamp",
	[IIO_CAPACITANCE] = "capacitance",
	[IIO_ALTVOLTAGE] = "altvoltage",
	[IIO_CCT] = "cct",
	[IIO_PRESSURE] = "pressure",
	[IIO_HUMIDITYRELATIVE] = "humidityrelative",
	[IIO_ACTIVITY] = "activity",
	[IIO_STEPS] = "steps",
	[IIO_ENERGY] = "energy",
	[IIO_DISTANCE] = "distance",
	[IIO_VELOCITY] = "velocity",
	[IIO_CONCENTRATION] = "concentration",
	[IIO_RESISTANCE] = "resistance",
	[IIO_PH] = "ph",
	[IIO_UVINDEX] = "uvindex",
	[IIO_GRAVITY] = "gravity",
	[IIO_POSITIONRELATIVE] = "positionrelative",
	[IIO_PHASE] = "phase",
	[IIO_MASSCONCENTRATION] = "massconcentration",
};

static const char * const iio_ev_type_text[] = {
	[IIO_EV_TYPE_THRESH] = "thresh",
	[IIO_EV_TYPE_MAG] = "mag",
	[IIO_EV_TYPE_ROC] = "roc",
	[IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive",
	[IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive",
	[IIO_EV_TYPE_CHANGE] = "change",
	[IIO_EV_TYPE_MAG_REFERENCED] = "mag_referenced",
	[IIO_EV_TYPE_GESTURE] = "gesture",
};

static const char * const iio_ev_dir_text[] = {
	[IIO_EV_DIR_EITHER] = "either",
	[IIO_EV_DIR_RISING] = "rising",
	[IIO_EV_DIR_FALLING] = "falling",
	[IIO_EV_DIR_SINGLETAP] = "singletap",
	[IIO_EV_DIR_DOUBLETAP] = "doubletap",
};

static const char * const iio_modifier_names[] = {
	[IIO_MOD_X] = "x",
	[IIO_MOD_Y] = "y",
	[IIO_MOD_Z] = "z",
	[IIO_MOD_X_AND_Y] = "x&y",
	[IIO_MOD_X_AND_Z] = "x&z",
	[IIO_MOD_Y_AND_Z] = "y&z",
	[IIO_MOD_X_AND_Y_AND_Z] = "x&y&z",
	[IIO_MOD_X_OR_Y] = "x|y",
	[IIO_MOD_X_OR_Z] = "x|z",
	[IIO_MOD_Y_OR_Z] = "y|z",
	[IIO_MOD_X_OR_Y_OR_Z] = "x|y|z",
	[IIO_MOD_LIGHT_BOTH] = "both",
	[IIO_MOD_LIGHT_IR] = "ir",
	[IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)",
	[IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2",
	[IIO_MOD_LIGHT_CLEAR] = "clear",
	[IIO_MOD_LIGHT_RED] = "red",
	[IIO_MOD_LIGHT_GREEN] = "green",
	[IIO_MOD_LIGHT_BLUE] = "blue",
	[IIO_MOD_LIGHT_UV] = "uv",
	[IIO_MOD_LIGHT_DUV] = "duv",
	[IIO_MOD_QUATERNION] = "quaternion",
	[IIO_MOD_TEMP_AMBIENT] = "ambient",
	[IIO_MOD_TEMP_OBJECT] = "object",
	[IIO_MOD_NORTH_MAGN] = "from_north_magnetic",
	[IIO_MOD_NORTH_TRUE] = "from_north_true",
	[IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp",
	[IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp",
	[IIO_MOD_RUNNING] = "running",
	[IIO_MOD_JOGGING] = "jogging",
	[IIO_MOD_WALKING] = "walking",
	[IIO_MOD_STILL] = "still",
	[IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
	[IIO_MOD_I] = "i",
	[IIO_MOD_Q] = "q",
	[IIO_MOD_CO2] = "co2",
	[IIO_MOD_ETHANOL] = "ethanol",
	[IIO_MOD_H2] = "h2",
	[IIO_MOD_VOC] = "voc",
	[IIO_MOD_PM1] = "pm1",
	[IIO_MOD_PM2P5] = "pm2p5",
	[IIO_MOD_PM4] = "pm4",
	[IIO_MOD_PM10] = "pm10",
	[IIO_MOD_O2] = "o2",
	[IIO_MOD_LINEAR_X] = "linear_x",
	[IIO_MOD_LINEAR_Y] = "linear_y",
	[IIO_MOD_LINEAR_Z] = "linear_z",
	[IIO_MOD_PITCH] = "pitch",
	[IIO_MOD_YAW] = "yaw",
	[IIO_MOD_ROLL] = "roll",
};

static bool event_is_known(struct iio_event_data *event)
{
	enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
	enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
	enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
	enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);

	switch (type) {
	case IIO_VOLTAGE:
	case IIO_CURRENT:
	case IIO_POWER:
	case IIO_ACCEL:
	case IIO_ANGL_VEL:
	case IIO_MAGN:
	case IIO_LIGHT:
	case IIO_INTENSITY:
	case IIO_PROXIMITY:
	case IIO_TEMP:
	case IIO_INCLI:
	case IIO_ROT:
	case IIO_ANGL:
	case IIO_TIMESTAMP:
	case IIO_CAPACITANCE:
	case IIO_ALTVOLTAGE:
	case IIO_CCT:
	case IIO_PRESSURE:
	case IIO_HUMIDITYRELATIVE:
	case IIO_ACTIVITY:
	case IIO_STEPS:
	case IIO_ENERGY:
	case IIO_DISTANCE:
	case IIO_VELOCITY:
	case IIO_CONCENTRATION:
	case IIO_RESISTANCE:
	case IIO_PH:
	case IIO_UVINDEX:
	case IIO_GRAVITY:
	case IIO_POSITIONRELATIVE:
	case IIO_PHASE:
	case IIO_MASSCONCENTRATION:
		break;
	default:
		return false;
	}

	switch (mod) {
	case IIO_NO_MOD:
	case IIO_MOD_X:
	case IIO_MOD_Y:
	case IIO_MOD_Z:
	case IIO_MOD_X_AND_Y:
	case IIO_MOD_X_AND_Z:
	case IIO_MOD_Y_AND_Z:
	case IIO_MOD_X_AND_Y_AND_Z:
	case IIO_MOD_X_OR_Y:
	case IIO_MOD_X_OR_Z:
	case IIO_MOD_Y_OR_Z:
	case IIO_MOD_X_OR_Y_OR_Z:
	case IIO_MOD_LIGHT_BOTH:
	case IIO_MOD_LIGHT_IR:
	case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
	case IIO_MOD_SUM_SQUARED_X_Y_Z:
	case IIO_MOD_LIGHT_CLEAR:
	case IIO_MOD_LIGHT_RED:
	case IIO_MOD_LIGHT_GREEN:
	case IIO_MOD_LIGHT_BLUE:
	case IIO_MOD_LIGHT_UV:
	case IIO_MOD_LIGHT_DUV:
	case IIO_MOD_QUATERNION:
	case IIO_MOD_TEMP_AMBIENT:
	case IIO_MOD_TEMP_OBJECT:
	case IIO_MOD_NORTH_MAGN:
	case IIO_MOD_NORTH_TRUE:
	case IIO_MOD_NORTH_MAGN_TILT_COMP:
	case IIO_MOD_NORTH_TRUE_TILT_COMP:
	case IIO_MOD_RUNNING:
	case IIO_MOD_JOGGING:
	case IIO_MOD_WALKING:
	case IIO_MOD_STILL:
	case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z:
	case IIO_MOD_I:
	case IIO_MOD_Q:
	case IIO_MOD_CO2:
	case IIO_MOD_ETHANOL:
	case IIO_MOD_H2:
	case IIO_MOD_VOC:
	case IIO_MOD_PM1:
	case IIO_MOD_PM2P5:
	case IIO_MOD_PM4:
	case IIO_MOD_PM10:
	case IIO_MOD_O2:
		break;
	default:
		return false;
	}

	switch (ev_type) {
	case IIO_EV_TYPE_THRESH:
	case IIO_EV_TYPE_MAG:
	case IIO_EV_TYPE_ROC:
	case IIO_EV_TYPE_THRESH_ADAPTIVE:
	case IIO_EV_TYPE_MAG_ADAPTIVE:
	case IIO_EV_TYPE_CHANGE:
	case IIO_EV_TYPE_GESTURE:
		break;
	default:
		return false;
	}

	switch (dir) {
	case IIO_EV_DIR_EITHER:
	case IIO_EV_DIR_RISING:
	case IIO_EV_DIR_FALLING:
	case IIO_EV_DIR_SINGLETAP:
	case IIO_EV_DIR_DOUBLETAP:
	case IIO_EV_DIR_NONE:
		break;
	default:
		return false;
	}

	return true;
}

static void print_event(struct iio_event_data *event)
{
	enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
	enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
	enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
	enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
	int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
	int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
	bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);

	if (!event_is_known(event)) {
		fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
			event->timestamp, event->id);

		return;
	}

	printf("Event: time: %lld, type: %s", event->timestamp,
	       iio_chan_type_name_spec[type]);

	if (mod != IIO_NO_MOD)
		printf("(%s)", iio_modifier_names[mod]);

	if (chan >= 0) {
		printf(", channel: %d", chan);
		if (diff && chan2 >= 0)
			printf("-%d", chan2);
	}

	printf(", evtype: %s", iio_ev_type_text[ev_type]);

	if (dir != IIO_EV_DIR_NONE)
		printf(", direction: %s", iio_ev_dir_text[dir]);

	printf("\n");
	fflush(stdout);
}

/* Enable or disable events in sysfs if the knob is available */
static void enable_events(char *dev_dir, int enable)
{
	const struct dirent *ent;
	char evdir[256];
	int ret;
	DIR *dp;

	snprintf(evdir, sizeof(evdir), FORMAT_EVENTS_DIR, dev_dir);
	evdir[sizeof(evdir)-1] = '\0';

	dp = opendir(evdir);
	if (!dp) {
		fprintf(stderr, "Enabling/disabling events: can't open %s\n",
			evdir);
		return;
	}

	while (ent = readdir(dp), ent) {
		if (iioutils_check_suffix(ent->d_name, "_en")) {
			printf("%sabling: %s\n",
			       enable ? "En" : "Dis",
			       ent->d_name);
			ret = write_sysfs_int(ent->d_name, evdir,
					      enable);
			if (ret < 0)
				fprintf(stderr, "Failed to enable/disable %s\n",
					ent->d_name);
		}
	}

	if (closedir(dp) == -1) {
		perror("Enabling/disabling channels: "
		       "Failed to close directory");
		return;
	}
}

int main(int argc, char **argv)
{
	struct iio_event_data event;
	const char *device_name;
	char *dev_dir_name = NULL;
	char *chrdev_name;
	int ret;
	int dev_num;
	int fd, event_fd;
	bool all_events = false;

	if (argc == 2) {
		device_name = argv[1];
	} else if (argc == 3) {
		device_name = argv[2];
		if (!strcmp(argv[1], "-a"))
			all_events = true;
	} else {
		fprintf(stderr,
			"Usage: iio_event_monitor [options] <device_name>\n"
			"Listen and display events from IIO devices\n"
			"  -a         Auto-activate all available events\n");
		return -1;
	}

	dev_num = find_type_by_name(device_name, "iio:device");
	if (dev_num >= 0) {
		printf("Found IIO device with name %s with device number %d\n",
		       device_name, dev_num);
		ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
		if (ret < 0)
			return -ENOMEM;
		/* Look up sysfs dir as well if we can */
		ret = asprintf(&dev_dir_name, "%siio:device%d", iio_dir, dev_num);
		if (ret < 0)
			return -ENOMEM;
	} else {
		/*
		 * If we can't find an IIO device by name assume device_name is
		 * an IIO chrdev
		 */
		chrdev_name = strdup(device_name);
		if (!chrdev_name)
			return -ENOMEM;
	}

	if (all_events && dev_dir_name)
		enable_events(dev_dir_name, 1);

	fd = open(chrdev_name, 0);
	if (fd == -1) {
		ret = -errno;
		fprintf(stderr, "Failed to open %s\n", chrdev_name);
		goto error_free_chrdev_name;
	}

	ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
	if (ret == -1 || event_fd == -1) {
		ret = -errno;
		if (ret == -ENODEV)
			fprintf(stderr,
				"This device does not support events\n");
		else
			fprintf(stderr, "Failed to retrieve event fd\n");
		if (close(fd) == -1)
			perror("Failed to close character device file");

		goto error_free_chrdev_name;
	}

	if (close(fd) == -1)  {
		ret = -errno;
		goto error_free_chrdev_name;
	}

	while (true) {
		ret = read(event_fd, &event, sizeof(event));
		if (ret == -1) {
			if (errno == EAGAIN) {
				fprintf(stderr, "nothing available\n");
				continue;
			} else {
				ret = -errno;
				perror("Failed to read event from device");
				break;
			}
		}

		if (ret != sizeof(event)) {
			fprintf(stderr, "Reading event failed!\n");
			ret = -EIO;
			break;
		}

		print_event(&event);
	}

	if (close(event_fd) == -1)
		perror("Failed to close event file");

error_free_chrdev_name:
	/* Disable events after use */
	if (all_events && dev_dir_name)
		enable_events(dev_dir_name, 0);

	free(chrdev_name);

	return ret;
}
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
7042122f LPC	2	/* Industrialio event test code.
	3	*
	4	* Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de>
	5	*
7042122f LPC	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>
7042122f LPC	13	*/
7042122f LPC	14
7042122f	15	#include <unistd.h>
bdcb31d0	16	#include <stdlib.h>
e1d392dc	17	#include <dirent.h>
7042122f LPC	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"
06458e27	26	#include <linux/iio/events.h>
95763859	27	#include <linux/iio/types.h>
7042122f LPC	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",
a2160146	45	[IIO_ALTVOLTAGE] = "altvoltage",
0378250b PM	46	[IIO_CCT] = "cct",
	47	[IIO_PRESSURE] = "pressure",
	48	[IIO_HUMIDITYRELATIVE] = "humidityrelative",
282a5663 DB	49	[IIO_ACTIVITY] = "activity",
282a5663 DB	50	[IIO_STEPS] = "steps",
30e83267 PM	51	[IIO_ENERGY] = "energy",
	52	[IIO_DISTANCE] = "distance",
	53	[IIO_VELOCITY] = "velocity",
6ad515c6 PMS	54	[IIO_CONCENTRATION] = "concentration",
	55	[IIO_RESISTANCE] = "resistance",
	56	[IIO_PH] = "ph",
d409404c	57	[IIO_UVINDEX] = "uvindex",
571299d0	58	[IIO_GRAVITY] = "gravity",
3055a6cf	59	[IIO_POSITIONRELATIVE] = "positionrelative",
c73314e6	60	[IIO_PHASE] = "phase",
17abc9ec	61	[IIO_MASSCONCENTRATION] = "massconcentration",
7042122f LPC	62	};
	63
	64	static const char * const iio_ev_type_text[] = {
	65	[IIO_EV_TYPE_THRESH] = "thresh",
	66	[IIO_EV_TYPE_MAG] = "mag",
	67	[IIO_EV_TYPE_ROC] = "roc",
	68	[IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive",
	69	[IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive",
27be8423	70	[IIO_EV_TYPE_CHANGE] = "change",
a1a5cfe7	71	[IIO_EV_TYPE_MAG_REFERENCED] = "mag_referenced",
835e699e	72	[IIO_EV_TYPE_GESTURE] = "gesture",
7042122f LPC	73	};
	74
	75	static const char * const iio_ev_dir_text[] = {
	76	[IIO_EV_DIR_EITHER] = "either",
	77	[IIO_EV_DIR_RISING] = "rising",
835e699e JJ	78	[IIO_EV_DIR_FALLING] = "falling",
	79	[IIO_EV_DIR_SINGLETAP] = "singletap",
	80	[IIO_EV_DIR_DOUBLETAP] = "doubletap",
7042122f LPC	81	};
	82
	83	static const char * const iio_modifier_names[] = {
	84	[IIO_MOD_X] = "x",
	85	[IIO_MOD_Y] = "y",
	86	[IIO_MOD_Z] = "z",
0a6e2170 RD	87	[IIO_MOD_X_AND_Y] = "x&y",
	88	[IIO_MOD_X_AND_Z] = "x&z",
	89	[IIO_MOD_Y_AND_Z] = "y&z",
	90	[IIO_MOD_X_AND_Y_AND_Z] = "x&y&z",
	91	[IIO_MOD_X_OR_Y] = "x\|y",
	92	[IIO_MOD_X_OR_Z] = "x\|z",
	93	[IIO_MOD_Y_OR_Z] = "y\|z",
	94	[IIO_MOD_X_OR_Y_OR_Z] = "x\|y\|z",
7042122f LPC	95	[IIO_MOD_LIGHT_BOTH] = "both",
7042122f LPC	96	[IIO_MOD_LIGHT_IR] = "ir",
da4db940 PM	97	[IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)",
	98	[IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2",
	99	[IIO_MOD_LIGHT_CLEAR] = "clear",
	100	[IIO_MOD_LIGHT_RED] = "red",
	101	[IIO_MOD_LIGHT_GREEN] = "green",
	102	[IIO_MOD_LIGHT_BLUE] = "blue",
2c5ff1f9	103	[IIO_MOD_LIGHT_UV] = "uv",
c0e4e0fd	104	[IIO_MOD_LIGHT_DUV] = "duv",
0a6e2170 RD	105	[IIO_MOD_QUATERNION] = "quaternion",
	106	[IIO_MOD_TEMP_AMBIENT] = "ambient",
	107	[IIO_MOD_TEMP_OBJECT] = "object",
	108	[IIO_MOD_NORTH_MAGN] = "from_north_magnetic",
	109	[IIO_MOD_NORTH_TRUE] = "from_north_true",
	110	[IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp",
	111	[IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp",
282a5663 DB	112	[IIO_MOD_RUNNING] = "running",
	113	[IIO_MOD_JOGGING] = "jogging",
	114	[IIO_MOD_WALKING] = "walking",
	115	[IIO_MOD_STILL] = "still",
30e83267	116	[IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
6ad515c6 PMS	117	[IIO_MOD_I] = "i",
	118	[IIO_MOD_Q] = "q",
	119	[IIO_MOD_CO2] = "co2",
b170f7d4 AB	120	[IIO_MOD_ETHANOL] = "ethanol",
b170f7d4 AB	121	[IIO_MOD_H2] = "h2",
6ad515c6	122	[IIO_MOD_VOC] = "voc",
17abc9ec TD	123	[IIO_MOD_PM1] = "pm1",
	124	[IIO_MOD_PM2P5] = "pm2p5",
	125	[IIO_MOD_PM4] = "pm4",
	126	[IIO_MOD_PM10] = "pm10",
4ffa22fd	127	[IIO_MOD_O2] = "o2",
4db63c85 AM	128	[IIO_MOD_LINEAR_X] = "linear_x",
	129	[IIO_MOD_LINEAR_Y] = "linear_y",
	130	[IIO_MOD_LINEAR_Z] = "linear_z",
ab9d343d AM	131	[IIO_MOD_PITCH] = "pitch",
	132	[IIO_MOD_YAW] = "yaw",
	133	[IIO_MOD_ROLL] = "roll",
7042122f LPC	134	};
	135
	136	static bool event_is_known(struct iio_event_data *event)
	137	{
	138	enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
	139	enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
	140	enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
	141	enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
	142
	143	switch (type) {
	144	case IIO_VOLTAGE:
	145	case IIO_CURRENT:
	146	case IIO_POWER:
	147	case IIO_ACCEL:
	148	case IIO_ANGL_VEL:
	149	case IIO_MAGN:
	150	case IIO_LIGHT:
	151	case IIO_INTENSITY:
	152	case IIO_PROXIMITY:
	153	case IIO_TEMP:
	154	case IIO_INCLI:
	155	case IIO_ROT:
	156	case IIO_ANGL:
	157	case IIO_TIMESTAMP:
	158	case IIO_CAPACITANCE:
a2160146	159	case IIO_ALTVOLTAGE:
0378250b PM	160	case IIO_CCT:
	161	case IIO_PRESSURE:
	162	case IIO_HUMIDITYRELATIVE:
282a5663 DB	163	case IIO_ACTIVITY:
282a5663 DB	164	case IIO_STEPS:
30e83267 PM	165	case IIO_ENERGY:
	166	case IIO_DISTANCE:
	167	case IIO_VELOCITY:
6ad515c6 PMS	168	case IIO_CONCENTRATION:
	169	case IIO_RESISTANCE:
	170	case IIO_PH:
d409404c	171	case IIO_UVINDEX:
571299d0	172	case IIO_GRAVITY:
3055a6cf	173	case IIO_POSITIONRELATIVE:
c73314e6	174	case IIO_PHASE:
17abc9ec	175	case IIO_MASSCONCENTRATION:
7042122f LPC	176	break;
	177	default:
	178	return false;
	179	}
	180
	181	switch (mod) {
	182	case IIO_NO_MOD:
	183	case IIO_MOD_X:
	184	case IIO_MOD_Y:
	185	case IIO_MOD_Z:
0a6e2170 RD	186	case IIO_MOD_X_AND_Y:
	187	case IIO_MOD_X_AND_Z:
	188	case IIO_MOD_Y_AND_Z:
	189	case IIO_MOD_X_AND_Y_AND_Z:
	190	case IIO_MOD_X_OR_Y:
	191	case IIO_MOD_X_OR_Z:
	192	case IIO_MOD_Y_OR_Z:
	193	case IIO_MOD_X_OR_Y_OR_Z:
7042122f LPC	194	case IIO_MOD_LIGHT_BOTH:
7042122f LPC	195	case IIO_MOD_LIGHT_IR:
da4db940 PM	196	case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
	197	case IIO_MOD_SUM_SQUARED_X_Y_Z:
	198	case IIO_MOD_LIGHT_CLEAR:
	199	case IIO_MOD_LIGHT_RED:
	200	case IIO_MOD_LIGHT_GREEN:
	201	case IIO_MOD_LIGHT_BLUE:
2c5ff1f9	202	case IIO_MOD_LIGHT_UV:
c0e4e0fd	203	case IIO_MOD_LIGHT_DUV:
0a6e2170 RD	204	case IIO_MOD_QUATERNION:
	205	case IIO_MOD_TEMP_AMBIENT:
	206	case IIO_MOD_TEMP_OBJECT:
	207	case IIO_MOD_NORTH_MAGN:
	208	case IIO_MOD_NORTH_TRUE:
	209	case IIO_MOD_NORTH_MAGN_TILT_COMP:
	210	case IIO_MOD_NORTH_TRUE_TILT_COMP:
282a5663 DB	211	case IIO_MOD_RUNNING:
	212	case IIO_MOD_JOGGING:
	213	case IIO_MOD_WALKING:
	214	case IIO_MOD_STILL:
30e83267	215	case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z:
6ad515c6 PMS	216	case IIO_MOD_I:
	217	case IIO_MOD_Q:
	218	case IIO_MOD_CO2:
b170f7d4 AB	219	case IIO_MOD_ETHANOL:
b170f7d4 AB	220	case IIO_MOD_H2:
6ad515c6	221	case IIO_MOD_VOC:
17abc9ec TD	222	case IIO_MOD_PM1:
	223	case IIO_MOD_PM2P5:
	224	case IIO_MOD_PM4:
	225	case IIO_MOD_PM10:
4ffa22fd	226	case IIO_MOD_O2:
7042122f LPC	227	break;
	228	default:
	229	return false;
	230	}
	231
	232	switch (ev_type) {
	233	case IIO_EV_TYPE_THRESH:
	234	case IIO_EV_TYPE_MAG:
	235	case IIO_EV_TYPE_ROC:
	236	case IIO_EV_TYPE_THRESH_ADAPTIVE:
	237	case IIO_EV_TYPE_MAG_ADAPTIVE:
27be8423	238	case IIO_EV_TYPE_CHANGE:
835e699e	239	case IIO_EV_TYPE_GESTURE:
7042122f LPC	240	break;
	241	default:
	242	return false;
	243	}
	244
	245	switch (dir) {
	246	case IIO_EV_DIR_EITHER:
	247	case IIO_EV_DIR_RISING:
	248	case IIO_EV_DIR_FALLING:
835e699e JJ	249	case IIO_EV_DIR_SINGLETAP:
835e699e JJ	250	case IIO_EV_DIR_DOUBLETAP:
282a5663	251	case IIO_EV_DIR_NONE:
7042122f LPC	252	break;
	253	default:
	254	return false;
	255	}
	256
	257	return true;
	258	}
	259
	260	static void print_event(struct iio_event_data *event)
	261	{
	262	enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
	263	enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
	264	enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
	265	enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
	266	int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
	267	int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
	268	bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
	269
	270	if (!event_is_known(event)) {
d9abc615 CO	271	fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
d9abc615 CO	272	event->timestamp, event->id);
7663a4aa	273
7042122f LPC	274	return;
	275	}
	276
916e89e4 HK	277	printf("Event: time: %lld, type: %s", event->timestamp,
916e89e4 HK	278	iio_chan_type_name_spec[type]);
7042122f	279
916e89e4 HK	280	if (mod != IIO_NO_MOD)
916e89e4 HK	281	printf("(%s)", iio_modifier_names[mod]);
7042122f	282
916e89e4 HK	283	if (chan >= 0) {
	284	printf(", channel: %d", chan);
	285	if (diff && chan2 >= 0)
	286	printf("-%d", chan2);
	287	}
7042122f	288
916e89e4	289	printf(", evtype: %s", iio_ev_type_text[ev_type]);
282a5663 DB	290
	291	if (dir != IIO_EV_DIR_NONE)
	292	printf(", direction: %s", iio_ev_dir_text[dir]);
7663a4aa	293
282a5663	294	printf("\n");
c054fe99	295	fflush(stdout);
7042122f LPC	296	}
7042122f LPC	297
e1d392dc LW	298	/* Enable or disable events in sysfs if the knob is available */
	299	static void enable_events(char *dev_dir, int enable)
	300	{
	301	const struct dirent *ent;
	302	char evdir[256];
	303	int ret;
	304	DIR *dp;
	305
	306	snprintf(evdir, sizeof(evdir), FORMAT_EVENTS_DIR, dev_dir);
	307	evdir[sizeof(evdir)-1] = '\0';
	308
	309	dp = opendir(evdir);
	310	if (!dp) {
	311	fprintf(stderr, "Enabling/disabling events: can't open %s\n",
	312	evdir);
	313	return;
	314	}
	315
	316	while (ent = readdir(dp), ent) {
	317	if (iioutils_check_suffix(ent->d_name, "_en")) {
	318	printf("%sabling: %s\n",
	319	enable ? "En" : "Dis",
	320	ent->d_name);
	321	ret = write_sysfs_int(ent->d_name, evdir,
	322	enable);
	323	if (ret < 0)
	324	fprintf(stderr, "Failed to enable/disable %s\n",
	325	ent->d_name);
	326	}
	327	}
	328
	329	if (closedir(dp) == -1) {
	330	perror("Enabling/disabling channels: "
	331	"Failed to close directory");
	332	return;
	333	}
	334	}
	335
7042122f LPC	336	int main(int argc, char **argv)
	337	{
	338	struct iio_event_data event;
	339	const char *device_name;
e1d392dc	340	char *dev_dir_name = NULL;
7042122f LPC	341	char *chrdev_name;
	342	int ret;
	343	int dev_num;
	344	int fd, event_fd;
e1d392dc LW	345	bool all_events = false;
	346
	347	if (argc == 2) {
	348	device_name = argv[1];
	349	} else if (argc == 3) {
	350	device_name = argv[2];
	351	if (!strcmp(argv[1], "-a"))
	352	all_events = true;
	353	} else {
	354	fprintf(stderr,
	355	"Usage: iio_event_monitor [options] <device_name>\n"
	356	"Listen and display events from IIO devices\n"
	357	" -a Auto-activate all available events\n");
7042122f LPC	358	return -1;
	359	}
	360
7042122f LPC	361	dev_num = find_type_by_name(device_name, "iio:device");
	362	if (dev_num >= 0) {
	363	printf("Found IIO device with name %s with device number %d\n",
7663a4aa	364	device_name, dev_num);
7042122f	365	ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
37d38e2b	366	if (ret < 0)
0e799878	367	return -ENOMEM;
e1d392dc LW	368	/* Look up sysfs dir as well if we can */
	369	ret = asprintf(&dev_dir_name, "%siio:device%d", iio_dir, dev_num);
	370	if (ret < 0)
	371	return -ENOMEM;
7042122f	372	} else {
7663a4aa HK	373	/*
	374	* If we can't find an IIO device by name assume device_name is
	375	* an IIO chrdev
	376	*/
7042122f	377	chrdev_name = strdup(device_name);
e9e45b43 HK	378	if (!chrdev_name)
e9e45b43 HK	379	return -ENOMEM;
7042122f LPC	380	}
7042122f LPC	381
e1d392dc LW	382	if (all_events && dev_dir_name)
	383	enable_events(dev_dir_name, 1);
	384
7042122f LPC	385	fd = open(chrdev_name, 0);
7042122f LPC	386	if (fd == -1) {
7042122f	387	ret = -errno;
d9abc615	388	fprintf(stderr, "Failed to open %s\n", chrdev_name);
7042122f LPC	389	goto error_free_chrdev_name;
	390	}
	391
	392	ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
7042122f	393	if (ret == -1 \|\| event_fd == -1) {
7042122f	394	ret = -errno;
672f93b6 LW	395	if (ret == -ENODEV)
	396	fprintf(stderr,
	397	"This device does not support events\n");
	398	else
	399	fprintf(stderr, "Failed to retrieve event fd\n");
5fdb8c61 HK	400	if (close(fd) == -1)
	401	perror("Failed to close character device file");
	402
7042122f LPC	403	goto error_free_chrdev_name;
	404	}
	405
963f54ce HK	406	if (close(fd) == -1) {
	407	ret = -errno;
	408	goto error_free_chrdev_name;
	409	}
5fdb8c61	410
7042122f LPC	411	while (true) {
	412	ret = read(event_fd, &event, sizeof(event));
	413	if (ret == -1) {
	414	if (errno == EAGAIN) {
d9abc615	415	fprintf(stderr, "nothing available\n");
7042122f LPC	416	continue;
7042122f LPC	417	} else {
7042122f	418	ret = -errno;
2b6a6e67	419	perror("Failed to read event from device");
7042122f LPC	420	break;
	421	}
	422	}
	423
09a33f05	424	if (ret != sizeof(event)) {
d9abc615	425	fprintf(stderr, "Reading event failed!\n");
09a33f05 HK	426	ret = -EIO;
	427	break;
	428	}
	429
7042122f LPC	430	print_event(&event);
	431	}
	432
963f54ce HK	433	if (close(event_fd) == -1)
	434	perror("Failed to close event file");
	435
7042122f	436	error_free_chrdev_name:
e1d392dc LW	437	/* Disable events after use */
	438	if (all_events && dev_dir_name)
	439	enable_events(dev_dir_name, 0);
	440
7042122f	441	free(chrdev_name);
0e799878	442
7042122f LPC	443	return ret;
7042122f LPC	444	}