F: drivers/iio/
F: drivers/staging/iio/
F: include/linux/iio/
+F: tools/iio/
IKANOS/ADI EAGLE ADSL USB DRIVER
M: Matthieu Castet <castet.matthieu@free.fr>
+++ /dev/null
-/* 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.
- *
- */
-
-#define _GNU_SOURCE
-
-#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 = 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;
-}
+++ /dev/null
-/* 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>
- *
- */
-
-#define _GNU_SOURCE
-
-#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;
-}
+++ /dev/null
-/* 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 <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/";
-
-/**
- * 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;
-
- current = strdup(full_name);
- working = strtok(current, "_\0");
- w = working;
- r = working;
-
- while (*r != '\0') {
- if (!isdigit(*r)) {
- *w = *r;
- w++;
- }
- r++;
- }
- *w = '\0';
- *generic_name = strdup(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", ¤t_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,
- ¤t->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", ¤t->index);
- fclose(sysfsfp);
- free(filename);
- /* Find the scale */
- ret = iioutils_get_param_float(¤t->scale,
- "scale",
- device_dir,
- current->name,
- current->generic_name);
- if (ret < 0)
- goto error_cleanup_array;
- ret = iioutils_get_param_float(¤t->offset,
- "offset",
- device_dir,
- current->name,
- current->generic_name);
- if (ret < 0)
- goto error_cleanup_array;
- ret = iioutils_get_type(¤t->is_signed,
- ¤t->bytes,
- ¤t->bits_used,
- ¤t->shift,
- ¤t->mask,
- ¤t->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;
-}
+++ /dev/null
-#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_ */
+++ /dev/null
-/*
- * 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;
- int number, numstrlen;
-
- FILE *nameFile;
- DIR *dp;
- char thisname[IIO_MAX_NAME_LENGTH];
- char *filename;
-
- 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;
-}
--- /dev/null
+CC = gcc
+CFLAGS = -Wall -g
+
+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
--- /dev/null
+/* 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.
+ *
+ */
+
+#define _GNU_SOURCE
+
+#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 = 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;
+}
--- /dev/null
+/* 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>
+ *
+ */
+
+#define _GNU_SOURCE
+
+#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;
+}
--- /dev/null
+/* 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 <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/";
+
+/**
+ * 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;
+
+ current = strdup(full_name);
+ working = strtok(current, "_\0");
+ w = working;
+ r = working;
+
+ while (*r != '\0') {
+ if (!isdigit(*r)) {
+ *w = *r;
+ w++;
+ }
+ r++;
+ }
+ *w = '\0';
+ *generic_name = strdup(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", ¤t_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,
+ ¤t->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", ¤t->index);
+ fclose(sysfsfp);
+ free(filename);
+ /* Find the scale */
+ ret = iioutils_get_param_float(¤t->scale,
+ "scale",
+ device_dir,
+ current->name,
+ current->generic_name);
+ if (ret < 0)
+ goto error_cleanup_array;
+ ret = iioutils_get_param_float(¤t->offset,
+ "offset",
+ device_dir,
+ current->name,
+ current->generic_name);
+ if (ret < 0)
+ goto error_cleanup_array;
+ ret = iioutils_get_type(¤t->is_signed,
+ ¤t->bytes,
+ ¤t->bits_used,
+ ¤t->shift,
+ ¤t->mask,
+ ¤t->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;
+}
--- /dev/null
+#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_ */
--- /dev/null
+/*
+ * 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;
+ int number, numstrlen;
+
+ FILE *nameFile;
+ DIR *dp;
+ char thisname[IIO_MAX_NAME_LENGTH];
+ char *filename;
+
+ 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;
+}
projects / cascardo / linux.git / commitdiff