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iio: Move iio userspace applications out of staging

Browse source 
This patch moves iio userspace applications out of staging, to tools/iio/
and adds a Makefile in order to compile them easily. It also adds tools/iio/
to MAINTAINERS file.

Signed-off-by: Roberta Dobrescu <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
This commit is contained in:
Roberta Dobrescu 2015-02-26 10:49:25 +02:00 • committed by Jonathan Cameron
commit 817020cfb3
7 changed files with 17 additions and 0 deletions
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16
tools/iio/Makefile Normal file
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@ -0,0 +1,16 @@
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

361
tools/iio/generic_buffer.c Normal file
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/* 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;
}

310
tools/iio/iio_event_monitor.c Normal file
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/* 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;
}

651
tools/iio/iio_utils.c Normal file
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/* 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", &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;
}

71
tools/iio/iio_utils.h Normal file
View file

@ -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_ */

163
tools/iio/lsiio.c Normal file
View file

@ -0,0 +1,163 @@
/*
* 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;
}