summaryrefslogtreecommitdiffstats
path: root/kernel/tools/iio
diff options
context:
space:
mode:
authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/tools/iio
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/tools/iio')
-rw-r--r--kernel/tools/iio/Makefile16
-rw-r--r--kernel/tools/iio/generic_buffer.c359
-rw-r--r--kernel/tools/iio/iio_event_monitor.c308
-rw-r--r--kernel/tools/iio/iio_utils.c669
-rw-r--r--kernel/tools/iio/iio_utils.h71
-rw-r--r--kernel/tools/iio/lsiio.c158
6 files changed, 1581 insertions, 0 deletions
diff --git a/kernel/tools/iio/Makefile b/kernel/tools/iio/Makefile
new file mode 100644
index 000000000..bf7ae6d66
--- /dev/null
+++ b/kernel/tools/iio/Makefile
@@ -0,0 +1,16 @@
+CC = gcc
+CFLAGS = -Wall -g -D_GNU_SOURCE
+
+all: iio_event_monitor lsiio generic_buffer
+
+iio_event_monitor: iio_event_monitor.o iio_utils.o
+
+lsiio: lsiio.o iio_utils.o
+
+generic_buffer: generic_buffer.o iio_utils.o
+
+%.o: %.c iio_utils.h
+
+.PHONY: clean
+clean:
+ rm -f *.o iio_event_monitor lsiio generic_buffer
diff --git a/kernel/tools/iio/generic_buffer.c b/kernel/tools/iio/generic_buffer.c
new file mode 100644
index 000000000..f805493be
--- /dev/null
+++ b/kernel/tools/iio/generic_buffer.c
@@ -0,0 +1,359 @@
+/* Industrialio buffer test code.
+ *
+ * Copyright (c) 2008 Jonathan Cameron
+ *
+ * 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.
+ *
+ * Command line parameters
+ * generic_buffer -n <device_name> -t <trigger_name>
+ * If trigger name is not specified the program assumes you want a dataready
+ * trigger associated with the device and goes looking for it.
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/dir.h>
+#include <linux/types.h>
+#include <string.h>
+#include <poll.h>
+#include <endian.h>
+#include <getopt.h>
+#include <inttypes.h>
+#include "iio_utils.h"
+
+/**
+ * size_from_channelarray() - calculate the storage size of a scan
+ * @channels: the channel info array
+ * @num_channels: number of channels
+ *
+ * Has the side effect of filling the channels[i].location values used
+ * in processing the buffer output.
+ **/
+int size_from_channelarray(struct iio_channel_info *channels, int num_channels)
+{
+ int bytes = 0;
+ int i = 0;
+
+ while (i < num_channels) {
+ if (bytes % channels[i].bytes == 0)
+ channels[i].location = bytes;
+ else
+ channels[i].location = bytes - bytes%channels[i].bytes
+ + channels[i].bytes;
+ bytes = channels[i].location + channels[i].bytes;
+ i++;
+ }
+ return bytes;
+}
+
+void print2byte(int input, struct iio_channel_info *info)
+{
+ /* First swap if incorrect endian */
+ if (info->be)
+ input = be16toh((uint16_t)input);
+ else
+ input = le16toh((uint16_t)input);
+
+ /*
+ * Shift before conversion to avoid sign extension
+ * of left aligned data
+ */
+ input >>= info->shift;
+ if (info->is_signed) {
+ int16_t val = input;
+
+ val &= (1 << info->bits_used) - 1;
+ val = (int16_t)(val << (16 - info->bits_used)) >>
+ (16 - info->bits_used);
+ printf("%05f ", ((float)val + info->offset)*info->scale);
+ } else {
+ uint16_t val = input;
+
+ val &= (1 << info->bits_used) - 1;
+ printf("%05f ", ((float)val + info->offset)*info->scale);
+ }
+}
+/**
+ * process_scan() - print out the values in SI units
+ * @data: pointer to the start of the scan
+ * @channels: information about the channels. Note
+ * size_from_channelarray must have been called first to fill the
+ * location offsets.
+ * @num_channels: number of channels
+ **/
+void process_scan(char *data,
+ struct iio_channel_info *channels,
+ int num_channels)
+{
+ int k;
+
+ for (k = 0; k < num_channels; k++)
+ switch (channels[k].bytes) {
+ /* only a few cases implemented so far */
+ case 2:
+ print2byte(*(uint16_t *)(data + channels[k].location),
+ &channels[k]);
+ break;
+ case 4:
+ if (!channels[k].is_signed) {
+ uint32_t val = *(uint32_t *)
+ (data + channels[k].location);
+ printf("%05f ", ((float)val +
+ channels[k].offset)*
+ channels[k].scale);
+
+ }
+ break;
+ case 8:
+ if (channels[k].is_signed) {
+ int64_t val = *(int64_t *)
+ (data +
+ channels[k].location);
+ if ((val >> channels[k].bits_used) & 1)
+ val = (val & channels[k].mask) |
+ ~channels[k].mask;
+ /* special case for timestamp */
+ if (channels[k].scale == 1.0f &&
+ channels[k].offset == 0.0f)
+ printf("%" PRId64 " ", val);
+ else
+ printf("%05f ", ((float)val +
+ channels[k].offset)*
+ channels[k].scale);
+ }
+ break;
+ default:
+ break;
+ }
+ printf("\n");
+}
+
+int main(int argc, char **argv)
+{
+ unsigned long num_loops = 2;
+ unsigned long timedelay = 1000000;
+ unsigned long buf_len = 128;
+
+ int ret, c, i, j, toread;
+ int fp;
+
+ int num_channels;
+ char *trigger_name = NULL, *device_name = NULL;
+ char *dev_dir_name, *buf_dir_name;
+
+ int datardytrigger = 1;
+ char *data;
+ ssize_t read_size;
+ int dev_num, trig_num;
+ char *buffer_access;
+ int scan_size;
+ int noevents = 0;
+ int notrigger = 0;
+ char *dummy;
+
+ struct iio_channel_info *channels;
+
+ while ((c = getopt(argc, argv, "l:w:c:et:n:g")) != -1) {
+ switch (c) {
+ case 'n':
+ device_name = optarg;
+ break;
+ case 't':
+ trigger_name = optarg;
+ datardytrigger = 0;
+ break;
+ case 'e':
+ noevents = 1;
+ break;
+ case 'c':
+ num_loops = strtoul(optarg, &dummy, 10);
+ break;
+ case 'w':
+ timedelay = strtoul(optarg, &dummy, 10);
+ break;
+ case 'l':
+ buf_len = strtoul(optarg, &dummy, 10);
+ break;
+ case 'g':
+ notrigger = 1;
+ break;
+ case '?':
+ return -1;
+ }
+ }
+
+ if (device_name == NULL)
+ return -1;
+
+ /* Find the device requested */
+ dev_num = find_type_by_name(device_name, "iio:device");
+ if (dev_num < 0) {
+ printf("Failed to find the %s\n", device_name);
+ ret = -ENODEV;
+ goto error_ret;
+ }
+ printf("iio device number being used is %d\n", dev_num);
+
+ asprintf(&dev_dir_name, "%siio:device%d", iio_dir, dev_num);
+
+ if (!notrigger) {
+ if (trigger_name == NULL) {
+ /*
+ * Build the trigger name. If it is device associated
+ * its name is <device_name>_dev[n] where n matches
+ * the device number found above.
+ */
+ ret = asprintf(&trigger_name,
+ "%s-dev%d", device_name, dev_num);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ goto error_ret;
+ }
+ }
+
+ /* Verify the trigger exists */
+ trig_num = find_type_by_name(trigger_name, "trigger");
+ if (trig_num < 0) {
+ printf("Failed to find the trigger %s\n", trigger_name);
+ ret = -ENODEV;
+ goto error_free_triggername;
+ }
+ printf("iio trigger number being used is %d\n", trig_num);
+ } else
+ printf("trigger-less mode selected\n");
+
+ /*
+ * Parse the files in scan_elements to identify what channels are
+ * present
+ */
+ ret = build_channel_array(dev_dir_name, &channels, &num_channels);
+ if (ret) {
+ printf("Problem reading scan element information\n");
+ printf("diag %s\n", dev_dir_name);
+ goto error_free_triggername;
+ }
+
+ /*
+ * Construct the directory name for the associated buffer.
+ * As we know that the lis3l02dq has only one buffer this may
+ * be built rather than found.
+ */
+ ret = asprintf(&buf_dir_name,
+ "%siio:device%d/buffer", iio_dir, dev_num);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ goto error_free_triggername;
+ }
+
+ if (!notrigger) {
+ printf("%s %s\n", dev_dir_name, trigger_name);
+ /* Set the device trigger to be the data ready trigger found
+ * above */
+ ret = write_sysfs_string_and_verify("trigger/current_trigger",
+ dev_dir_name,
+ trigger_name);
+ if (ret < 0) {
+ printf("Failed to write current_trigger file\n");
+ goto error_free_buf_dir_name;
+ }
+ }
+
+ /* Setup ring buffer parameters */
+ ret = write_sysfs_int("length", buf_dir_name, buf_len);
+ if (ret < 0)
+ goto error_free_buf_dir_name;
+
+ /* Enable the buffer */
+ ret = write_sysfs_int("enable", buf_dir_name, 1);
+ if (ret < 0)
+ goto error_free_buf_dir_name;
+ scan_size = size_from_channelarray(channels, num_channels);
+ data = malloc(scan_size*buf_len);
+ if (!data) {
+ ret = -ENOMEM;
+ goto error_free_buf_dir_name;
+ }
+
+ ret = asprintf(&buffer_access, "/dev/iio:device%d", dev_num);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ goto error_free_data;
+ }
+
+ /* Attempt to open non blocking the access dev */
+ fp = open(buffer_access, O_RDONLY | O_NONBLOCK);
+ if (fp == -1) { /* If it isn't there make the node */
+ printf("Failed to open %s\n", buffer_access);
+ ret = -errno;
+ goto error_free_buffer_access;
+ }
+
+ /* Wait for events 10 times */
+ for (j = 0; j < num_loops; j++) {
+ if (!noevents) {
+ struct pollfd pfd = {
+ .fd = fp,
+ .events = POLLIN,
+ };
+
+ poll(&pfd, 1, -1);
+ toread = buf_len;
+
+ } else {
+ usleep(timedelay);
+ toread = 64;
+ }
+
+ read_size = read(fp,
+ data,
+ toread*scan_size);
+ if (read_size < 0) {
+ if (errno == -EAGAIN) {
+ printf("nothing available\n");
+ continue;
+ } else
+ break;
+ }
+ for (i = 0; i < read_size/scan_size; i++)
+ process_scan(data + scan_size*i,
+ channels,
+ num_channels);
+ }
+
+ /* Stop the buffer */
+ ret = write_sysfs_int("enable", buf_dir_name, 0);
+ if (ret < 0)
+ goto error_close_buffer_access;
+
+ if (!notrigger)
+ /* Disconnect the trigger - just write a dummy name. */
+ write_sysfs_string("trigger/current_trigger",
+ dev_dir_name, "NULL");
+
+error_close_buffer_access:
+ close(fp);
+error_free_data:
+ free(data);
+error_free_buffer_access:
+ free(buffer_access);
+error_free_buf_dir_name:
+ free(buf_dir_name);
+error_free_triggername:
+ if (datardytrigger)
+ free(trigger_name);
+error_ret:
+ return ret;
+}
diff --git a/kernel/tools/iio/iio_event_monitor.c b/kernel/tools/iio/iio_event_monitor.c
new file mode 100644
index 000000000..427c271ac
--- /dev/null
+++ b/kernel/tools/iio/iio_event_monitor.c
@@ -0,0 +1,308 @@
+/* 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",
+};
+
+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",
+};
+
+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:
+ 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:
+ 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)) {
+ printf("Unknown event: time: %lld, id: %llx\n",
+ event->timestamp, event->id);
+ return;
+ }
+
+ printf("Event: time: %lld, ", event->timestamp);
+
+ if (mod != IIO_NO_MOD) {
+ printf("type: %s(%s), ",
+ iio_chan_type_name_spec[type],
+ iio_modifier_names[mod]);
+ } else {
+ printf("type: %s, ",
+ iio_chan_type_name_spec[type]);
+ }
+
+ if (diff && chan >= 0 && chan2 >= 0)
+ printf("channel: %d-%d, ", chan, chan2);
+ else if (chan >= 0)
+ printf("channel: %d, ", chan);
+
+ 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) {
+ printf("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) {
+ ret = -ENOMEM;
+ goto error_ret;
+ }
+ } else {
+ /* If we can't find a IIO device by name assume device_name is a
+ IIO chrdev */
+ chrdev_name = strdup(device_name);
+ }
+
+ fd = open(chrdev_name, 0);
+ if (fd == -1) {
+ fprintf(stdout, "Failed to open %s\n", chrdev_name);
+ ret = -errno;
+ goto error_free_chrdev_name;
+ }
+
+ ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
+
+ close(fd);
+
+ if (ret == -1 || event_fd == -1) {
+ fprintf(stdout, "Failed to retrieve event fd\n");
+ ret = -errno;
+ goto error_free_chrdev_name;
+ }
+
+ while (true) {
+ ret = read(event_fd, &event, sizeof(event));
+ if (ret == -1) {
+ if (errno == EAGAIN) {
+ printf("nothing available\n");
+ continue;
+ } else {
+ perror("Failed to read event from device");
+ ret = -errno;
+ break;
+ }
+ }
+
+ print_event(&event);
+ }
+
+ close(event_fd);
+error_free_chrdev_name:
+ free(chrdev_name);
+error_ret:
+ return ret;
+}
diff --git a/kernel/tools/iio/iio_utils.c b/kernel/tools/iio/iio_utils.c
new file mode 100644
index 000000000..6f6452167
--- /dev/null
+++ b/kernel/tools/iio/iio_utils.c
@@ -0,0 +1,669 @@
+/* IIO - useful set of util functionality
+ *
+ * Copyright (c) 2008 Jonathan Cameron
+ *
+ * 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.
+ */
+#ifndef _IIO_UTILS_H
+#define _IIO_UTILS_H
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <dirent.h>
+#include <errno.h>
+#include <ctype.h>
+#include "iio_utils.h"
+
+const char *iio_dir = "/sys/bus/iio/devices/";
+
+static char * const iio_direction[] = {
+ "in",
+ "out",
+};
+
+/**
+ * iioutils_break_up_name() - extract generic name from full channel name
+ * @full_name: the full channel name
+ * @generic_name: the output generic channel name
+ **/
+int iioutils_break_up_name(const char *full_name,
+ char **generic_name)
+{
+ char *current;
+ char *w, *r;
+ char *working, *prefix = "";
+ int i;
+
+ for (i = 0; i < sizeof(iio_direction) / sizeof(iio_direction[0]); i++)
+ if (!strncmp(full_name, iio_direction[i],
+ strlen(iio_direction[i]))) {
+ prefix = iio_direction[i];
+ break;
+ }
+
+ current = strdup(full_name + strlen(prefix) + 1);
+ working = strtok(current, "_\0");
+
+ w = working;
+ r = working;
+
+ while (*r != '\0') {
+ if (!isdigit(*r)) {
+ *w = *r;
+ w++;
+ }
+ r++;
+ }
+ *w = '\0';
+ asprintf(generic_name, "%s_%s", prefix, working);
+ free(current);
+
+ return 0;
+}
+
+/**
+ * iioutils_get_type() - find and process _type attribute data
+ * @is_signed: output whether channel is signed
+ * @bytes: output how many bytes the channel storage occupies
+ * @mask: output a bit mask for the raw data
+ * @be: big endian
+ * @device_dir: the iio device directory
+ * @name: the channel name
+ * @generic_name: the channel type name
+ **/
+int iioutils_get_type(unsigned *is_signed,
+ unsigned *bytes,
+ unsigned *bits_used,
+ unsigned *shift,
+ uint64_t *mask,
+ unsigned *be,
+ const char *device_dir,
+ const char *name,
+ const char *generic_name)
+{
+ FILE *sysfsfp;
+ int ret;
+ DIR *dp;
+ char *scan_el_dir, *builtname, *builtname_generic, *filename = 0;
+ char signchar, endianchar;
+ unsigned padint;
+ const struct dirent *ent;
+
+ ret = asprintf(&scan_el_dir, FORMAT_SCAN_ELEMENTS_DIR, device_dir);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ goto error_ret;
+ }
+ ret = asprintf(&builtname, FORMAT_TYPE_FILE, name);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ goto error_free_scan_el_dir;
+ }
+ ret = asprintf(&builtname_generic, FORMAT_TYPE_FILE, generic_name);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ goto error_free_builtname;
+ }
+
+ dp = opendir(scan_el_dir);
+ if (dp == NULL) {
+ ret = -errno;
+ goto error_free_builtname_generic;
+ }
+ while (ent = readdir(dp), ent != NULL)
+ /*
+ * Do we allow devices to override a generic name with
+ * a specific one?
+ */
+ if ((strcmp(builtname, ent->d_name) == 0) ||
+ (strcmp(builtname_generic, ent->d_name) == 0)) {
+ ret = asprintf(&filename,
+ "%s/%s", scan_el_dir, ent->d_name);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ goto error_closedir;
+ }
+ sysfsfp = fopen(filename, "r");
+ if (sysfsfp == NULL) {
+ printf("failed to open %s\n", filename);
+ ret = -errno;
+ goto error_free_filename;
+ }
+
+ ret = fscanf(sysfsfp,
+ "%ce:%c%u/%u>>%u",
+ &endianchar,
+ &signchar,
+ bits_used,
+ &padint, shift);
+ if (ret < 0) {
+ printf("failed to pass scan type description\n");
+ ret = -errno;
+ goto error_close_sysfsfp;
+ }
+ *be = (endianchar == 'b');
+ *bytes = padint / 8;
+ if (*bits_used == 64)
+ *mask = ~0;
+ else
+ *mask = (1 << *bits_used) - 1;
+ if (signchar == 's')
+ *is_signed = 1;
+ else
+ *is_signed = 0;
+ fclose(sysfsfp);
+ free(filename);
+
+ filename = 0;
+ sysfsfp = 0;
+ }
+error_close_sysfsfp:
+ if (sysfsfp)
+ fclose(sysfsfp);
+error_free_filename:
+ if (filename)
+ free(filename);
+error_closedir:
+ closedir(dp);
+error_free_builtname_generic:
+ free(builtname_generic);
+error_free_builtname:
+ free(builtname);
+error_free_scan_el_dir:
+ free(scan_el_dir);
+error_ret:
+ return ret;
+}
+
+int iioutils_get_param_float(float *output,
+ const char *param_name,
+ const char *device_dir,
+ const char *name,
+ const char *generic_name)
+{
+ FILE *sysfsfp;
+ int ret;
+ DIR *dp;
+ char *builtname, *builtname_generic;
+ char *filename = NULL;
+ const struct dirent *ent;
+
+ ret = asprintf(&builtname, "%s_%s", name, param_name);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ goto error_ret;
+ }
+ ret = asprintf(&builtname_generic,
+ "%s_%s", generic_name, param_name);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ goto error_free_builtname;
+ }
+ dp = opendir(device_dir);
+ if (dp == NULL) {
+ ret = -errno;
+ goto error_free_builtname_generic;
+ }
+ while (ent = readdir(dp), ent != NULL)
+ if ((strcmp(builtname, ent->d_name) == 0) ||
+ (strcmp(builtname_generic, ent->d_name) == 0)) {
+ ret = asprintf(&filename,
+ "%s/%s", device_dir, ent->d_name);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ goto error_closedir;
+ }
+ sysfsfp = fopen(filename, "r");
+ if (!sysfsfp) {
+ ret = -errno;
+ goto error_free_filename;
+ }
+ fscanf(sysfsfp, "%f", output);
+ break;
+ }
+error_free_filename:
+ if (filename)
+ free(filename);
+error_closedir:
+ closedir(dp);
+error_free_builtname_generic:
+ free(builtname_generic);
+error_free_builtname:
+ free(builtname);
+error_ret:
+ return ret;
+}
+
+/**
+ * bsort_channel_array_by_index() - reorder so that the array is in index order
+ *
+ **/
+
+void bsort_channel_array_by_index(struct iio_channel_info **ci_array,
+ int cnt)
+{
+
+ struct iio_channel_info temp;
+ int x, y;
+
+ for (x = 0; x < cnt; x++)
+ for (y = 0; y < (cnt - 1); y++)
+ if ((*ci_array)[y].index > (*ci_array)[y+1].index) {
+ temp = (*ci_array)[y + 1];
+ (*ci_array)[y + 1] = (*ci_array)[y];
+ (*ci_array)[y] = temp;
+ }
+}
+
+/**
+ * build_channel_array() - function to figure out what channels are present
+ * @device_dir: the IIO device directory in sysfs
+ * @
+ **/
+int build_channel_array(const char *device_dir,
+ struct iio_channel_info **ci_array,
+ int *counter)
+{
+ DIR *dp;
+ FILE *sysfsfp;
+ int count, i;
+ struct iio_channel_info *current;
+ int ret;
+ const struct dirent *ent;
+ char *scan_el_dir;
+ char *filename;
+
+ *counter = 0;
+ ret = asprintf(&scan_el_dir, FORMAT_SCAN_ELEMENTS_DIR, device_dir);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ goto error_ret;
+ }
+ dp = opendir(scan_el_dir);
+ if (dp == NULL) {
+ ret = -errno;
+ goto error_free_name;
+ }
+ while (ent = readdir(dp), ent != NULL)
+ if (strcmp(ent->d_name + strlen(ent->d_name) - strlen("_en"),
+ "_en") == 0) {
+ ret = asprintf(&filename,
+ "%s/%s", scan_el_dir, ent->d_name);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ goto error_close_dir;
+ }
+ sysfsfp = fopen(filename, "r");
+ if (sysfsfp == NULL) {
+ ret = -errno;
+ free(filename);
+ goto error_close_dir;
+ }
+ fscanf(sysfsfp, "%i", &ret);
+ if (ret == 1)
+ (*counter)++;
+ fclose(sysfsfp);
+ free(filename);
+ }
+ *ci_array = malloc(sizeof(**ci_array) * (*counter));
+ if (*ci_array == NULL) {
+ ret = -ENOMEM;
+ goto error_close_dir;
+ }
+ seekdir(dp, 0);
+ count = 0;
+ while (ent = readdir(dp), ent != NULL) {
+ if (strcmp(ent->d_name + strlen(ent->d_name) - strlen("_en"),
+ "_en") == 0) {
+ int current_enabled = 0;
+
+ current = &(*ci_array)[count++];
+ ret = asprintf(&filename,
+ "%s/%s", scan_el_dir, ent->d_name);
+ if (ret < 0) {
+ ret = -ENOMEM;
+ /* decrement count to avoid freeing name */
+ count--;
+ goto error_cleanup_array;
+ }
+ sysfsfp = fopen(filename, "r");
+ if (sysfsfp == NULL) {
+ free(filename);
+ ret = -errno;
+ goto error_cleanup_array;
+ }
+ fscanf(sysfsfp, "%i", &current_enabled);
+ fclose(sysfsfp);
+
+ if (!current_enabled) {
+ free(filename);
+ count--;
+ continue;
+ }
+
+ current->scale = 1.0;
+ current->offset = 0;
+ current->name = strndup(ent->d_name,
+ strlen(ent->d_name) -
+ strlen("_en"));
+ if (current->name == NULL) {
+ free(filename);
+ ret = -ENOMEM;
+ goto error_cleanup_array;
+ }
+ /* Get the generic and specific name elements */
+ ret = iioutils_break_up_name(current->name,
+ &current->generic_name);
+ if (ret) {
+ free(filename);
+ goto error_cleanup_array;
+ }
+ ret = asprintf(&filename,
+ "%s/%s_index",
+ scan_el_dir,
+ current->name);
+ if (ret < 0) {
+ free(filename);
+ ret = -ENOMEM;
+ goto error_cleanup_array;
+ }
+ sysfsfp = fopen(filename, "r");
+ fscanf(sysfsfp, "%u", &current->index);
+ fclose(sysfsfp);
+ free(filename);
+ /* Find the scale */
+ ret = iioutils_get_param_float(&current->scale,
+ "scale",
+ device_dir,
+ current->name,
+ current->generic_name);
+ if (ret < 0)
+ goto error_cleanup_array;
+ ret = iioutils_get_param_float(&current->offset,
+ "offset",
+ device_dir,
+ current->name,
+ current->generic_name);
+ if (ret < 0)
+ goto error_cleanup_array;
+ ret = iioutils_get_type(&current->is_signed,
+ &current->bytes,
+ &current->bits_used,
+ &current->shift,
+ &current->mask,
+ &current->be,
+ device_dir,
+ current->name,
+ current->generic_name);
+ }
+ }
+
+ closedir(dp);
+ /* reorder so that the array is in index order */
+ bsort_channel_array_by_index(ci_array, *counter);
+
+ return 0;
+
+error_cleanup_array:
+ for (i = count - 1; i >= 0; i--)
+ free((*ci_array)[i].name);
+ free(*ci_array);
+error_close_dir:
+ closedir(dp);
+error_free_name:
+ free(scan_el_dir);
+error_ret:
+ return ret;
+}
+
+/**
+ * find_type_by_name() - function to match top level types by name
+ * @name: top level type instance name
+ * @type: the type of top level instance being sort
+ *
+ * Typical types this is used for are device and trigger.
+ **/
+int find_type_by_name(const char *name, const char *type)
+{
+ const struct dirent *ent;
+ int number, numstrlen;
+
+ FILE *nameFile;
+ DIR *dp;
+ char thisname[IIO_MAX_NAME_LENGTH];
+ char *filename;
+
+ dp = opendir(iio_dir);
+ if (dp == NULL) {
+ printf("No industrialio devices available\n");
+ return -ENODEV;
+ }
+
+ while (ent = readdir(dp), ent != NULL) {
+ if (strcmp(ent->d_name, ".") != 0 &&
+ strcmp(ent->d_name, "..") != 0 &&
+ strlen(ent->d_name) > strlen(type) &&
+ strncmp(ent->d_name, type, strlen(type)) == 0) {
+ numstrlen = sscanf(ent->d_name + strlen(type),
+ "%d",
+ &number);
+ /* verify the next character is not a colon */
+ if (strncmp(ent->d_name + strlen(type) + numstrlen,
+ ":",
+ 1) != 0) {
+ filename = malloc(strlen(iio_dir)
+ + strlen(type)
+ + numstrlen
+ + 6);
+ if (filename == NULL) {
+ closedir(dp);
+ return -ENOMEM;
+ }
+ sprintf(filename, "%s%s%d/name",
+ iio_dir,
+ type,
+ number);
+ nameFile = fopen(filename, "r");
+ if (!nameFile) {
+ free(filename);
+ continue;
+ }
+ free(filename);
+ fscanf(nameFile, "%s", thisname);
+ fclose(nameFile);
+ if (strcmp(name, thisname) == 0) {
+ closedir(dp);
+ return number;
+ }
+ }
+ }
+ }
+ closedir(dp);
+ return -ENODEV;
+}
+
+int _write_sysfs_int(char *filename, char *basedir, int val, int verify)
+{
+ int ret = 0;
+ FILE *sysfsfp;
+ int test;
+ char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
+
+ if (temp == NULL)
+ return -ENOMEM;
+ sprintf(temp, "%s/%s", basedir, filename);
+ sysfsfp = fopen(temp, "w");
+ if (sysfsfp == NULL) {
+ printf("failed to open %s\n", temp);
+ ret = -errno;
+ goto error_free;
+ }
+ fprintf(sysfsfp, "%d", val);
+ fclose(sysfsfp);
+ if (verify) {
+ sysfsfp = fopen(temp, "r");
+ if (sysfsfp == NULL) {
+ printf("failed to open %s\n", temp);
+ ret = -errno;
+ goto error_free;
+ }
+ fscanf(sysfsfp, "%d", &test);
+ fclose(sysfsfp);
+ if (test != val) {
+ printf("Possible failure in int write %d to %s%s\n",
+ val,
+ basedir,
+ filename);
+ ret = -1;
+ }
+ }
+error_free:
+ free(temp);
+ return ret;
+}
+
+int write_sysfs_int(char *filename, char *basedir, int val)
+{
+ return _write_sysfs_int(filename, basedir, val, 0);
+}
+
+int write_sysfs_int_and_verify(char *filename, char *basedir, int val)
+{
+ return _write_sysfs_int(filename, basedir, val, 1);
+}
+
+int _write_sysfs_string(char *filename, char *basedir, char *val, int verify)
+{
+ int ret = 0;
+ FILE *sysfsfp;
+ char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
+
+ if (temp == NULL) {
+ printf("Memory allocation failed\n");
+ return -ENOMEM;
+ }
+ sprintf(temp, "%s/%s", basedir, filename);
+ sysfsfp = fopen(temp, "w");
+ if (sysfsfp == NULL) {
+ printf("Could not open %s\n", temp);
+ ret = -errno;
+ goto error_free;
+ }
+ fprintf(sysfsfp, "%s", val);
+ fclose(sysfsfp);
+ if (verify) {
+ sysfsfp = fopen(temp, "r");
+ if (sysfsfp == NULL) {
+ printf("could not open file to verify\n");
+ ret = -errno;
+ goto error_free;
+ }
+ fscanf(sysfsfp, "%s", temp);
+ fclose(sysfsfp);
+ if (strcmp(temp, val) != 0) {
+ printf("Possible failure in string write of %s "
+ "Should be %s "
+ "written to %s\%s\n",
+ temp,
+ val,
+ basedir,
+ filename);
+ ret = -1;
+ }
+ }
+error_free:
+ free(temp);
+
+ return ret;
+}
+
+/**
+ * write_sysfs_string_and_verify() - string write, readback and verify
+ * @filename: name of file to write to
+ * @basedir: the sysfs directory in which the file is to be found
+ * @val: the string to write
+ **/
+int write_sysfs_string_and_verify(char *filename, char *basedir, char *val)
+{
+ return _write_sysfs_string(filename, basedir, val, 1);
+}
+
+int write_sysfs_string(char *filename, char *basedir, char *val)
+{
+ return _write_sysfs_string(filename, basedir, val, 0);
+}
+
+int read_sysfs_posint(char *filename, char *basedir)
+{
+ int ret;
+ FILE *sysfsfp;
+ char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
+
+ if (temp == NULL) {
+ printf("Memory allocation failed");
+ return -ENOMEM;
+ }
+ sprintf(temp, "%s/%s", basedir, filename);
+ sysfsfp = fopen(temp, "r");
+ if (sysfsfp == NULL) {
+ ret = -errno;
+ goto error_free;
+ }
+ fscanf(sysfsfp, "%d\n", &ret);
+ fclose(sysfsfp);
+error_free:
+ free(temp);
+ return ret;
+}
+
+int read_sysfs_float(char *filename, char *basedir, float *val)
+{
+ int ret = 0;
+ FILE *sysfsfp;
+ char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
+
+ if (temp == NULL) {
+ printf("Memory allocation failed");
+ return -ENOMEM;
+ }
+ sprintf(temp, "%s/%s", basedir, filename);
+ sysfsfp = fopen(temp, "r");
+ if (sysfsfp == NULL) {
+ ret = -errno;
+ goto error_free;
+ }
+ fscanf(sysfsfp, "%f\n", val);
+ fclose(sysfsfp);
+error_free:
+ free(temp);
+ return ret;
+}
+
+int read_sysfs_string(const char *filename, const char *basedir, char *str)
+{
+ int ret = 0;
+ FILE *sysfsfp;
+ char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
+
+ if (temp == NULL) {
+ printf("Memory allocation failed");
+ return -ENOMEM;
+ }
+ sprintf(temp, "%s/%s", basedir, filename);
+ sysfsfp = fopen(temp, "r");
+ if (sysfsfp == NULL) {
+ ret = -errno;
+ goto error_free;
+ }
+ fscanf(sysfsfp, "%s\n", str);
+ fclose(sysfsfp);
+error_free:
+ free(temp);
+ return ret;
+}
+
+#endif /* _IIO_UTILS_H */
diff --git a/kernel/tools/iio/iio_utils.h b/kernel/tools/iio/iio_utils.h
new file mode 100644
index 000000000..1bc837b2d
--- /dev/null
+++ b/kernel/tools/iio/iio_utils.h
@@ -0,0 +1,71 @@
+#ifndef _IIO_UTILS_H_
+#define _IIO_UTILS_H_
+
+/* IIO - useful set of util functionality
+ *
+ * Copyright (c) 2008 Jonathan Cameron
+ *
+ * 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.
+ */
+
+#include <stdint.h>
+
+/* Made up value to limit allocation sizes */
+#define IIO_MAX_NAME_LENGTH 30
+
+#define FORMAT_SCAN_ELEMENTS_DIR "%s/scan_elements"
+#define FORMAT_TYPE_FILE "%s_type"
+
+extern const char *iio_dir;
+
+/**
+ * struct iio_channel_info - information about a given channel
+ * @name: channel name
+ * @generic_name: general name for channel type
+ * @scale: scale factor to be applied for conversion to si units
+ * @offset: offset to be applied for conversion to si units
+ * @index: the channel index in the buffer output
+ * @bytes: number of bytes occupied in buffer output
+ * @mask: a bit mask for the raw output
+ * @is_signed: is the raw value stored signed
+ * @enabled: is this channel enabled
+ **/
+struct iio_channel_info {
+ char *name;
+ char *generic_name;
+ float scale;
+ float offset;
+ unsigned index;
+ unsigned bytes;
+ unsigned bits_used;
+ unsigned shift;
+ uint64_t mask;
+ unsigned be;
+ unsigned is_signed;
+ unsigned location;
+};
+
+int iioutils_break_up_name(const char *full_name, char **generic_name);
+int iioutils_get_type(unsigned *is_signed, unsigned *bytes,
+ unsigned *bits_used, unsigned *shift,
+ uint64_t *mask, unsigned *be,
+ const char *device_dir, const char *name,
+ const char *generic_name);
+int iioutils_get_param_float(float *output, const char *param_name,
+ const char *device_dir, const char *name,
+ const char *generic_name);
+void bsort_channel_array_by_index(struct iio_channel_info **ci_array, int cnt);
+int build_channel_array(const char *device_dir,
+ struct iio_channel_info **ci_array, int *counter);
+int find_type_by_name(const char *name, const char *type);
+int write_sysfs_int(char *filename, char *basedir, int val);
+int write_sysfs_int_and_verify(char *filename, char *basedir, int val);
+int write_sysfs_string_and_verify(char *filename, char *basedir, char *val);
+int write_sysfs_string(char *filename, char *basedir, char *val);
+int read_sysfs_posint(char *filename, char *basedir);
+int read_sysfs_float(char *filename, char *basedir, float *val);
+int read_sysfs_string(const char *filename, const char *basedir, char *str);
+
+#endif /* _IIO_UTILS_H_ */
diff --git a/kernel/tools/iio/lsiio.c b/kernel/tools/iio/lsiio.c
new file mode 100644
index 000000000..c585440f8
--- /dev/null
+++ b/kernel/tools/iio/lsiio.c
@@ -0,0 +1,158 @@
+/*
+ * Industrial I/O utilities - lsiio.c
+ *
+ * Copyright (c) 2010 Manuel Stahl <manuel.stahl@iis.fraunhofer.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.
+ */
+
+#include <string.h>
+#include <dirent.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/dir.h>
+#include "iio_utils.h"
+
+
+static enum verbosity {
+ VERBLEVEL_DEFAULT, /* 0 gives lspci behaviour */
+ VERBLEVEL_SENSORS, /* 1 lists sensors */
+} verblevel = VERBLEVEL_DEFAULT;
+
+const char *type_device = "iio:device";
+const char *type_trigger = "trigger";
+
+
+static inline int check_prefix(const char *str, const char *prefix)
+{
+ return strlen(str) > strlen(prefix) &&
+ strncmp(str, prefix, strlen(prefix)) == 0;
+}
+
+static inline int check_postfix(const char *str, const char *postfix)
+{
+ return strlen(str) > strlen(postfix) &&
+ strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
+}
+
+static int dump_channels(const char *dev_dir_name)
+{
+ DIR *dp;
+ const struct dirent *ent;
+
+ dp = opendir(dev_dir_name);
+ if (dp == NULL)
+ return -errno;
+ while (ent = readdir(dp), ent != NULL)
+ if (check_prefix(ent->d_name, "in_") &&
+ check_postfix(ent->d_name, "_raw")) {
+ printf(" %-10s\n", ent->d_name);
+ }
+
+ return 0;
+}
+
+static int dump_one_device(const char *dev_dir_name)
+{
+ char name[IIO_MAX_NAME_LENGTH];
+ int dev_idx;
+ int retval;
+
+ retval = sscanf(dev_dir_name + strlen(iio_dir) + strlen(type_device),
+ "%i", &dev_idx);
+ if (retval != 1)
+ return -EINVAL;
+ read_sysfs_string("name", dev_dir_name, name);
+ printf("Device %03d: %s\n", dev_idx, name);
+
+ if (verblevel >= VERBLEVEL_SENSORS)
+ return dump_channels(dev_dir_name);
+ return 0;
+}
+
+static int dump_one_trigger(const char *dev_dir_name)
+{
+ char name[IIO_MAX_NAME_LENGTH];
+ int dev_idx;
+ int retval;
+
+ retval = sscanf(dev_dir_name + strlen(iio_dir) + strlen(type_trigger),
+ "%i", &dev_idx);
+ if (retval != 1)
+ return -EINVAL;
+ read_sysfs_string("name", dev_dir_name, name);
+ printf("Trigger %03d: %s\n", dev_idx, name);
+ return 0;
+}
+
+static void dump_devices(void)
+{
+ const struct dirent *ent;
+ DIR *dp;
+
+ dp = opendir(iio_dir);
+ if (dp == NULL) {
+ printf("No industrial I/O devices available\n");
+ return;
+ }
+
+ while (ent = readdir(dp), ent != NULL) {
+ if (check_prefix(ent->d_name, type_device)) {
+ char *dev_dir_name;
+
+ asprintf(&dev_dir_name, "%s%s", iio_dir, ent->d_name);
+ dump_one_device(dev_dir_name);
+ free(dev_dir_name);
+ if (verblevel >= VERBLEVEL_SENSORS)
+ printf("\n");
+ }
+ }
+ rewinddir(dp);
+ while (ent = readdir(dp), ent != NULL) {
+ if (check_prefix(ent->d_name, type_trigger)) {
+ char *dev_dir_name;
+
+ asprintf(&dev_dir_name, "%s%s", iio_dir, ent->d_name);
+ dump_one_trigger(dev_dir_name);
+ free(dev_dir_name);
+ }
+ }
+ closedir(dp);
+}
+
+int main(int argc, char **argv)
+{
+ int c, err = 0;
+
+ while ((c = getopt(argc, argv, "d:D:v")) != EOF) {
+ switch (c) {
+ case 'v':
+ verblevel++;
+ break;
+
+ case '?':
+ default:
+ err++;
+ break;
+ }
+ }
+ if (err || argc > optind) {
+ fprintf(stderr, "Usage: lsiio [options]...\n"
+ "List industrial I/O devices\n"
+ " -v, --verbose\n"
+ " Increase verbosity (may be given multiple times)\n"
+ );
+ exit(1);
+ }
+
+ dump_devices();
+
+ return 0;
+}