File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
new file mode 100644
index 0000000..d51eb04
--- /dev/null
+++ b/tools/iio/iio_event_monitor.c
@@ -0,0 +1,332 @@
+/* Industrialio event test code.
+ *
+ * Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * 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 <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",
+};
+
+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",
+};
+
+static const char * const iio_ev_dir_text[] = {
+ [IIO_EV_DIR_EITHER] = "either",
+ [IIO_EV_DIR_RISING] = "rising",
+ [IIO_EV_DIR_FALLING] = "falling"
+};
+
+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_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)",
+};
+
+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:
+ 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_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:
+ 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:
+ 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_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");
+}
+
+int main(int argc, char **argv)
+{
+ struct iio_event_data event;
+ const char *device_name;
+ char *chrdev_name;
+ int ret;
+ int dev_num;
+ int fd, event_fd;
+
+ if (argc <= 1) {
+ fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
+ return -1;
+ }
+
+ device_name = argv[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;
+ } 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;
+ }
+
+ 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:
+ free(chrdev_name);
+
+ return ret;
+}