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lastdragon
2026-09-06 12:53:21 -06:00
parent 662efe3c2a
commit ad2088d178
94853 changed files with 43200404 additions and 0 deletions
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linux-7.2.3/tools/iio/.gitignore
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# SPDX-License-Identifier: GPL-2.0-only
iio_event_monitor
iio_generic_buffer
lsiio
include/
linux-7.2.3/tools/iio/Build
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iio_utils-y += iio_utils.o
lsiio-y += lsiio.o iio_utils.o
iio_event_monitor-y += iio_event_monitor.o iio_utils.o
iio_generic_buffer-y += iio_generic_buffer.o iio_utils.o
linux-7.2.3/tools/iio/Makefile
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# SPDX-License-Identifier: GPL-2.0
include ../scripts/Makefile.include
bindir ?= /usr/bin
ifeq ($(srctree),)
srctree := $(patsubst %/,%,$(dir $(CURDIR)))
srctree := $(patsubst %/,%,$(dir $(srctree)))
endif
# Do not use make's built-in rules
# (this improves performance and avoids hard-to-debug behaviour);
MAKEFLAGS += -r
override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include
ALL_TARGETS := iio_event_monitor lsiio iio_generic_buffer
ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS))
all: $(ALL_PROGRAMS)
export srctree OUTPUT CC LD CFLAGS
include $(srctree)/tools/build/Makefile.include
#
# We need the following to be outside of kernel tree
#
$(OUTPUT)include/linux/iio: ../../include/uapi/linux/iio
mkdir -p $(OUTPUT)include/linux/iio 2>&1 || true
ln -sf $(CURDIR)/../../include/uapi/linux/iio/buffer.h $@
ln -sf $(CURDIR)/../../include/uapi/linux/iio/events.h $@
ln -sf $(CURDIR)/../../include/uapi/linux/iio/types.h $@
prepare: $(OUTPUT)include/linux/iio
IIO_UTILS_IN := $(OUTPUT)iio_utils-in.o
$(IIO_UTILS_IN): prepare FORCE
$(Q)$(MAKE) $(build)=iio_utils
LSIIO_IN := $(OUTPUT)lsiio-in.o
$(LSIIO_IN): prepare FORCE $(OUTPUT)iio_utils-in.o
$(Q)$(MAKE) $(build)=lsiio
$(OUTPUT)lsiio: $(LSIIO_IN)
$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
IIO_EVENT_MONITOR_IN := $(OUTPUT)iio_event_monitor-in.o
$(IIO_EVENT_MONITOR_IN): prepare FORCE $(OUTPUT)iio_utils-in.o
$(Q)$(MAKE) $(build)=iio_event_monitor
$(OUTPUT)iio_event_monitor: $(IIO_EVENT_MONITOR_IN)
$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
IIO_GENERIC_BUFFER_IN := $(OUTPUT)iio_generic_buffer-in.o
$(IIO_GENERIC_BUFFER_IN): prepare FORCE $(OUTPUT)iio_utils-in.o
$(Q)$(MAKE) $(build)=iio_generic_buffer
$(OUTPUT)iio_generic_buffer: $(IIO_GENERIC_BUFFER_IN)
$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
clean:
rm -f $(ALL_PROGRAMS)
rm -rf $(OUTPUT)include/linux/iio
find $(or $(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete -o -name '\.*.cmd' -delete
install: $(ALL_PROGRAMS)
install -d -m 755 $(DESTDIR)$(bindir); \
for program in $(ALL_PROGRAMS); do \
install $$program $(DESTDIR)$(bindir); \
done
FORCE:
.PHONY: all install clean FORCE prepare
linux-7.2.3/tools/iio/iio_event_monitor.c
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// SPDX-License-Identifier: GPL-2.0-only
/* Industrialio event test code.
*
* Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de>
*
* This program is primarily intended as an example application.
* Reads the current buffer setup from sysfs and starts a short capture
* from the specified device, pretty printing the result after appropriate
* conversion.
*
* Usage:
* iio_event_monitor <device_name>
*/
#include <unistd.h>
#include <stdlib.h>
#include <dirent.h>
#include <stdbool.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <poll.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include "iio_utils.h"
#include <linux/iio/events.h>
#include <linux/iio/types.h>
static const char * const iio_chan_type_name_spec[] = {
[IIO_VOLTAGE] = "voltage",
[IIO_CURRENT] = "current",
[IIO_POWER] = "power",
[IIO_ACCEL] = "accel",
[IIO_ANGL_VEL] = "anglvel",
[IIO_MAGN] = "magn",
[IIO_LIGHT] = "illuminance",
[IIO_INTENSITY] = "intensity",
[IIO_PROXIMITY] = "proximity",
[IIO_TEMP] = "temp",
[IIO_INCLI] = "incli",
[IIO_ROT] = "rot",
[IIO_ANGL] = "angl",
[IIO_TIMESTAMP] = "timestamp",
[IIO_CAPACITANCE] = "capacitance",
[IIO_ALTVOLTAGE] = "altvoltage",
[IIO_CCT] = "cct",
[IIO_PRESSURE] = "pressure",
[IIO_HUMIDITYRELATIVE] = "humidityrelative",
[IIO_ACTIVITY] = "activity",
[IIO_STEPS] = "steps",
[IIO_ENERGY] = "energy",
[IIO_DISTANCE] = "distance",
[IIO_VELOCITY] = "velocity",
[IIO_CONCENTRATION] = "concentration",
[IIO_RESISTANCE] = "resistance",
[IIO_PH] = "ph",
[IIO_UVINDEX] = "uvindex",
[IIO_GRAVITY] = "gravity",
[IIO_POSITIONRELATIVE] = "positionrelative",
[IIO_PHASE] = "phase",
[IIO_MASSCONCENTRATION] = "massconcentration",
[IIO_DELTA_ANGL] = "deltaangl",
[IIO_DELTA_VELOCITY] = "deltavelocity",
[IIO_COLORTEMP] = "colortemp",
[IIO_CHROMATICITY] = "chromaticity",
[IIO_ATTENTION] = "attention",
[IIO_ALTCURRENT] = "altcurrent",
[IIO_COVERAGE] = "coverage",
};
static const char * const iio_ev_type_text[] = {
[IIO_EV_TYPE_THRESH] = "thresh",
[IIO_EV_TYPE_MAG] = "mag",
[IIO_EV_TYPE_ROC] = "roc",
[IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive",
[IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive",
[IIO_EV_TYPE_CHANGE] = "change",
[IIO_EV_TYPE_MAG_REFERENCED] = "mag_referenced",
[IIO_EV_TYPE_GESTURE] = "gesture",
[IIO_EV_TYPE_FAULT] = "fault",
};
static const char * const iio_ev_dir_text[] = {
[IIO_EV_DIR_EITHER] = "either",
[IIO_EV_DIR_RISING] = "rising",
[IIO_EV_DIR_FALLING] = "falling",
[IIO_EV_DIR_SINGLETAP] = "singletap",
[IIO_EV_DIR_DOUBLETAP] = "doubletap",
[IIO_EV_DIR_FAULT_OPENWIRE] = "openwire",
};
static const char * const iio_modifier_names[] = {
[IIO_MOD_X] = "x",
[IIO_MOD_Y] = "y",
[IIO_MOD_Z] = "z",
[IIO_MOD_X_AND_Y] = "x&y",
[IIO_MOD_X_AND_Z] = "x&z",
[IIO_MOD_Y_AND_Z] = "y&z",
[IIO_MOD_X_AND_Y_AND_Z] = "x&y&z",
[IIO_MOD_X_OR_Y] = "x|y",
[IIO_MOD_X_OR_Z] = "x|z",
[IIO_MOD_Y_OR_Z] = "y|z",
[IIO_MOD_X_OR_Y_OR_Z] = "x|y|z",
[IIO_MOD_LIGHT_BOTH] = "both",
[IIO_MOD_LIGHT_IR] = "ir",
[IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)",
[IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2",
[IIO_MOD_LIGHT_CLEAR] = "clear",
[IIO_MOD_LIGHT_RED] = "red",
[IIO_MOD_LIGHT_GREEN] = "green",
[IIO_MOD_LIGHT_BLUE] = "blue",
[IIO_MOD_LIGHT_UV] = "uv",
[IIO_MOD_LIGHT_UVA] = "uva",
[IIO_MOD_LIGHT_UVB] = "uvb",
[IIO_MOD_LIGHT_DUV] = "duv",
[IIO_MOD_QUATERNION] = "quaternion",
[IIO_MOD_TEMP_AMBIENT] = "ambient",
[IIO_MOD_TEMP_OBJECT] = "object",
[IIO_MOD_NORTH_MAGN] = "from_north_magnetic",
[IIO_MOD_NORTH_TRUE] = "from_north_true",
[IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp",
[IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp",
[IIO_MOD_RUNNING] = "running",
[IIO_MOD_JOGGING] = "jogging",
[IIO_MOD_WALKING] = "walking",
[IIO_MOD_STILL] = "still",
[IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
[IIO_MOD_I] = "i",
[IIO_MOD_Q] = "q",
[IIO_MOD_CO2] = "co2",
[IIO_MOD_ETHANOL] = "ethanol",
[IIO_MOD_H2] = "h2",
[IIO_MOD_VOC] = "voc",
[IIO_MOD_PM1] = "pm1",
[IIO_MOD_PM2P5] = "pm2p5",
[IIO_MOD_PM4] = "pm4",
[IIO_MOD_PM10] = "pm10",
[IIO_MOD_O2] = "o2",
[IIO_MOD_LINEAR_X] = "linear_x",
[IIO_MOD_LINEAR_Y] = "linear_y",
[IIO_MOD_LINEAR_Z] = "linear_z",
[IIO_MOD_PITCH] = "pitch",
[IIO_MOD_YAW] = "yaw",
[IIO_MOD_ROLL] = "roll",
[IIO_MOD_RMS] = "rms",
[IIO_MOD_ACTIVE] = "active",
[IIO_MOD_REACTIVE] = "reactive",
[IIO_MOD_APPARENT] = "apparent",
[IIO_MOD_QUATERNION_AXIS] = "quaternionaxis",
};
static bool event_is_known(struct iio_event_data *event)
{
enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
switch (type) {
case IIO_VOLTAGE:
case IIO_CURRENT:
case IIO_POWER:
case IIO_ACCEL:
case IIO_ANGL_VEL:
case IIO_MAGN:
case IIO_LIGHT:
case IIO_INTENSITY:
case IIO_PROXIMITY:
case IIO_TEMP:
case IIO_INCLI:
case IIO_ROT:
case IIO_ANGL:
case IIO_TIMESTAMP:
case IIO_CAPACITANCE:
case IIO_ALTVOLTAGE:
case IIO_CCT:
case IIO_PRESSURE:
case IIO_HUMIDITYRELATIVE:
case IIO_ACTIVITY:
case IIO_STEPS:
case IIO_ENERGY:
case IIO_DISTANCE:
case IIO_VELOCITY:
case IIO_CONCENTRATION:
case IIO_RESISTANCE:
case IIO_PH:
case IIO_UVINDEX:
case IIO_GRAVITY:
case IIO_POSITIONRELATIVE:
case IIO_PHASE:
case IIO_MASSCONCENTRATION:
case IIO_DELTA_ANGL:
case IIO_DELTA_VELOCITY:
case IIO_COLORTEMP:
case IIO_CHROMATICITY:
case IIO_ATTENTION:
case IIO_ALTCURRENT:
case IIO_COVERAGE:
break;
default:
return false;
}
switch (mod) {
case IIO_NO_MOD:
case IIO_MOD_X:
case IIO_MOD_Y:
case IIO_MOD_Z:
case IIO_MOD_X_AND_Y:
case IIO_MOD_X_AND_Z:
case IIO_MOD_Y_AND_Z:
case IIO_MOD_X_AND_Y_AND_Z:
case IIO_MOD_X_OR_Y:
case IIO_MOD_X_OR_Z:
case IIO_MOD_Y_OR_Z:
case IIO_MOD_X_OR_Y_OR_Z:
case IIO_MOD_LIGHT_BOTH:
case IIO_MOD_LIGHT_IR:
case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
case IIO_MOD_SUM_SQUARED_X_Y_Z:
case IIO_MOD_LIGHT_CLEAR:
case IIO_MOD_LIGHT_RED:
case IIO_MOD_LIGHT_GREEN:
case IIO_MOD_LIGHT_BLUE:
case IIO_MOD_LIGHT_UV:
case IIO_MOD_LIGHT_DUV:
case IIO_MOD_QUATERNION:
case IIO_MOD_TEMP_AMBIENT:
case IIO_MOD_TEMP_OBJECT:
case IIO_MOD_NORTH_MAGN:
case IIO_MOD_NORTH_TRUE:
case IIO_MOD_NORTH_MAGN_TILT_COMP:
case IIO_MOD_NORTH_TRUE_TILT_COMP:
case IIO_MOD_RUNNING:
case IIO_MOD_JOGGING:
case IIO_MOD_WALKING:
case IIO_MOD_STILL:
case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z:
case IIO_MOD_I:
case IIO_MOD_Q:
case IIO_MOD_CO2:
case IIO_MOD_ETHANOL:
case IIO_MOD_H2:
case IIO_MOD_VOC:
case IIO_MOD_PM1:
case IIO_MOD_PM2P5:
case IIO_MOD_PM4:
case IIO_MOD_PM10:
case IIO_MOD_O2:
case IIO_MOD_RMS:
case IIO_MOD_ACTIVE:
case IIO_MOD_REACTIVE:
case IIO_MOD_APPARENT:
break;
default:
return false;
}
switch (ev_type) {
case IIO_EV_TYPE_THRESH:
case IIO_EV_TYPE_MAG:
case IIO_EV_TYPE_ROC:
case IIO_EV_TYPE_THRESH_ADAPTIVE:
case IIO_EV_TYPE_MAG_ADAPTIVE:
case IIO_EV_TYPE_CHANGE:
case IIO_EV_TYPE_GESTURE:
case IIO_EV_TYPE_FAULT:
break;
default:
return false;
}
switch (dir) {
case IIO_EV_DIR_EITHER:
case IIO_EV_DIR_RISING:
case IIO_EV_DIR_FALLING:
case IIO_EV_DIR_SINGLETAP:
case IIO_EV_DIR_DOUBLETAP:
case IIO_EV_DIR_FAULT_OPENWIRE:
case IIO_EV_DIR_NONE:
break;
default:
return false;
}
return true;
}
static void print_event(struct iio_event_data *event)
{
enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
if (!event_is_known(event)) {
fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
event->timestamp, event->id);
return;
}
printf("Event: time: %lld, type: %s", event->timestamp,
iio_chan_type_name_spec[type]);
if (mod != IIO_NO_MOD)
printf("(%s)", iio_modifier_names[mod]);
if (chan >= 0) {
printf(", channel: %d", chan);
if (diff && chan2 >= 0)
printf("-%d", chan2);
}
printf(", evtype: %s", iio_ev_type_text[ev_type]);
if (dir != IIO_EV_DIR_NONE)
printf(", direction: %s", iio_ev_dir_text[dir]);
printf("\n");
fflush(stdout);
}
/* Enable or disable events in sysfs if the knob is available */
static void enable_events(char *dev_dir, int enable)
{
const struct dirent *ent;
char evdir[256];
int ret;
DIR *dp;
snprintf(evdir, sizeof(evdir), FORMAT_EVENTS_DIR, dev_dir);
evdir[sizeof(evdir)-1] = '\0';
dp = opendir(evdir);
if (!dp) {
fprintf(stderr, "Enabling/disabling events: can't open %s\n",
evdir);
return;
}
while (ent = readdir(dp), ent) {
if (iioutils_check_suffix(ent->d_name, "_en")) {
printf("%sabling: %s\n",
enable ? "En" : "Dis",
ent->d_name);
ret = write_sysfs_int(ent->d_name, evdir,
enable);
if (ret < 0)
fprintf(stderr, "Failed to enable/disable %s\n",
ent->d_name);
}
}
if (closedir(dp) == -1) {
perror("Enabling/disabling channels: "
"Failed to close directory");
return;
}
}
int main(int argc, char **argv)
{
struct iio_event_data event;
const char *device_name;
char *dev_dir_name = NULL;
char *chrdev_name;
int ret;
int dev_num;
int fd, event_fd;
bool all_events = false;
if (argc == 2) {
device_name = argv[1];
} else if (argc == 3) {
device_name = argv[2];
if (!strcmp(argv[1], "-a"))
all_events = true;
} else {
fprintf(stderr,
"Usage: iio_event_monitor [options] <device_name>\n"
"Listen and display events from IIO devices\n"
" -a Auto-activate all available events\n");
return -1;
}
dev_num = find_type_by_name(device_name, "iio:device");
if (dev_num >= 0) {
printf("Found IIO device with name %s with device number %d\n",
device_name, dev_num);
ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
if (ret < 0)
return -ENOMEM;
/* Look up sysfs dir as well if we can */
ret = asprintf(&dev_dir_name, "%siio:device%d", iio_dir, dev_num);
if (ret < 0)
return -ENOMEM;
} else {
/*
* If we can't find an IIO device by name assume device_name is
* an IIO chrdev
*/
chrdev_name = strdup(device_name);
if (!chrdev_name)
return -ENOMEM;
}
if (all_events && dev_dir_name)
enable_events(dev_dir_name, 1);
fd = open(chrdev_name, 0);
if (fd == -1) {
ret = -errno;
fprintf(stderr, "Failed to open %s\n", chrdev_name);
goto error_free_chrdev_name;
}
ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
if (ret == -1 || event_fd == -1) {
ret = -errno;
if (ret == -ENODEV)
fprintf(stderr,
"This device does not support events\n");
else
fprintf(stderr, "Failed to retrieve event fd\n");
if (close(fd) == -1)
perror("Failed to close character device file");
goto error_free_chrdev_name;
}
if (close(fd) == -1) {
ret = -errno;
goto error_free_chrdev_name;
}
while (true) {
ret = read(event_fd, &event, sizeof(event));
if (ret == -1) {
if (errno == EAGAIN) {
fprintf(stderr, "nothing available\n");
continue;
} else {
ret = -errno;
perror("Failed to read event from device");
break;
}
}
if (ret != sizeof(event)) {
fprintf(stderr, "Reading event failed!\n");
ret = -EIO;
break;
}
print_event(&event);
}
if (close(event_fd) == -1)
perror("Failed to close event file");
error_free_chrdev_name:
/* Disable events after use */
if (all_events && dev_dir_name)
enable_events(dev_dir_name, 0);
free(chrdev_name);
free(dev_dir_name);
return ret;
}
linux-7.2.3/tools/iio/iio_generic_buffer.c
+836
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@@ -0,0 +1,836 @@
// SPDX-License-Identifier: GPL-2.0-only
/* Industrialio buffer test code.
*
* Copyright (c) 2008 Jonathan Cameron
*
* This program is primarily intended as an example application.
* Reads the current buffer setup from sysfs and starts a short capture
* from the specified device, pretty printing the result after appropriate
* conversion.
*
* Command line parameters
* generic_buffer -n <device_name> -t <trigger_name>
* If trigger name is not specified the program assumes you want a dataready
* trigger associated with the device and goes looking for it.
*/
#include <unistd.h>
#include <stdlib.h>
#include <dirent.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/dir.h>
#include <linux/types.h>
#include <string.h>
#include <poll.h>
#include <endian.h>
#include <float.h>
#include <getopt.h>
#include <inttypes.h>
#include <stdbool.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <linux/iio/buffer.h>
#include "iio_utils.h"
/**
* enum autochan - state for the automatic channel enabling mechanism
*/
enum autochan {
AUTOCHANNELS_DISABLED,
AUTOCHANNELS_ENABLED,
AUTOCHANNELS_ACTIVE,
};
/**
* 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.
**/
static unsigned int size_from_channelarray(struct iio_channel_info *channels, int num_channels)
{
unsigned int bytes = 0;
int i = 0, max = 0;
unsigned int misalignment;
while (i < num_channels) {
if (channels[i].bytes > max)
max = channels[i].bytes;
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++;
}
/*
* We want the data in next sample to also be properly aligned so
* we'll add padding at the end if needed. Adding padding only
* works for channel data which size is 2^n bytes.
*/
misalignment = bytes % max;
if (misalignment)
bytes += max - misalignment;
return bytes;
}
static void print1byte(uint8_t input, struct iio_channel_info *info)
{
/*
* Shift before conversion to avoid sign extension
* of left aligned data
*/
input >>= info->shift;
input &= info->mask;
switch (info->format) {
case 's': {
int8_t val = (int8_t)(input << (8 - info->bits_used)) >>
(8 - info->bits_used);
printf("%05f ", ((float)val + info->offset) * info->scale);
break;
}
case 'u':
printf("%05f ", ((float)input + info->offset) * info->scale);
break;
case 'f':
printf("<invalid 1-byte float> ");
break;
}
}
static void print2byte(uint16_t input, struct iio_channel_info *info)
{
/* First swap if incorrect endian */
if (info->be)
input = be16toh(input);
else
input = le16toh(input);
/*
* Shift before conversion to avoid sign extension
* of left aligned data
*/
input >>= info->shift;
input &= info->mask;
switch (info->format) {
case 's': {
int16_t val = (int16_t)(input << (16 - info->bits_used)) >>
(16 - info->bits_used);
printf("%05f ", ((float)val + info->offset) * info->scale);
break;
}
case 'u':
printf("%05f ", ((float)input + info->offset) * info->scale);
break;
case 'f': {
#if defined(__FLT16_MAX__)
union {
uint16_t u;
_Float16 f;
} converter;
converter.u = input;
printf("%05f ", ((float)converter.f + info->offset) * info->scale);
#else
printf("<unsupported 2-byte float> ");
#endif
break;
}
}
}
static void print4byte(uint32_t input, struct iio_channel_info *info)
{
/* First swap if incorrect endian */
if (info->be)
input = be32toh(input);
else
input = le32toh(input);
/*
* Shift before conversion to avoid sign extension
* of left aligned data
*/
input >>= info->shift;
input &= info->mask;
switch (info->format) {
case 's': {
int32_t val = (int32_t)(input << (32 - info->bits_used)) >>
(32 - info->bits_used);
printf("%05f ", ((float)val + info->offset) * info->scale);
break;
}
case 'u':
printf("%05f ", ((float)input + info->offset) * info->scale);
break;
case 'f': {
union {
uint32_t u;
float f;
} converter;
converter.u = input;
printf("%05f ", (converter.f + info->offset) * info->scale);
break;
}
}
}
static void print8byte(uint64_t input, struct iio_channel_info *info)
{
/* First swap if incorrect endian */
if (info->be)
input = be64toh(input);
else
input = le64toh(input);
/*
* Shift before conversion to avoid sign extension
* of left aligned data
*/
input >>= info->shift;
input &= info->mask;
switch (info->format) {
case 's': {
int64_t val = (int64_t)(input << (64 - info->bits_used)) >>
(64 - info->bits_used);
/* special case for timestamp */
if (info->scale == 1.0f && info->offset == 0.0f)
printf("%" PRId64 " ", val);
else
printf("%05f ",
((float)val + info->offset) * info->scale);
break;
}
case 'u':
printf("%05f ", ((float)input + info->offset) * info->scale);
break;
case 'f': {
union {
uint64_t u;
double f;
} converter;
converter.u = input;
printf("%05f ", (converter.f + info->offset) * info->scale);
break;
}
}
}
/**
* 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
**/
static 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 1:
print1byte(*(uint8_t *)(data + channels[k].location),
&channels[k]);
break;
case 2:
print2byte(*(uint16_t *)(data + channels[k].location),
&channels[k]);
break;
case 4:
print4byte(*(uint32_t *)(data + channels[k].location),
&channels[k]);
break;
case 8:
print8byte(*(uint64_t *)(data + channels[k].location),
&channels[k]);
break;
default:
break;
}
printf("\n");
}
static int enable_disable_all_channels(char *dev_dir_name, int buffer_idx, int enable)
{
const struct dirent *ent;
char scanelemdir[256];
DIR *dp;
int ret;
snprintf(scanelemdir, sizeof(scanelemdir),
FORMAT_SCAN_ELEMENTS_DIR, dev_dir_name, buffer_idx);
scanelemdir[sizeof(scanelemdir)-1] = '\0';
dp = opendir(scanelemdir);
if (!dp) {
fprintf(stderr, "Enabling/disabling channels: can't open %s\n",
scanelemdir);
return -EIO;
}
ret = -ENOENT;
while (ent = readdir(dp), ent) {
if (iioutils_check_suffix(ent->d_name, "_en")) {
printf("%sabling: %s\n",
enable ? "En" : "Dis",
ent->d_name);
ret = write_sysfs_int(ent->d_name, scanelemdir,
enable);
if (ret < 0)
fprintf(stderr, "Failed to enable/disable %s\n",
ent->d_name);
}
}
if (closedir(dp) == -1) {
perror("Enabling/disabling channels: "
"Failed to close directory");
return -errno;
}
return 0;
}
static void print_usage(void)
{
fprintf(stderr, "Usage: generic_buffer [options]...\n"
"Capture, convert and output data from IIO device buffer\n"
" -a Auto-activate all available channels\n"
" -A Force-activate ALL channels\n"
" -b <n> The buffer which to open (by index), default 0\n"
" -c <n> Do n conversions, or loop forever if n < 0\n"
" -e Disable wait for event (new data)\n"
" -g Use trigger-less mode\n"
" -l <n> Set buffer length to n samples\n"
" --device-name -n <name>\n"
" --device-num -N <num>\n"
" Set device by name or number (mandatory)\n"
" --trigger-name -t <name>\n"
" --trigger-num -T <num>\n"
" Set trigger by name or number\n"
" -w <n> Set delay between reads in us (event-less mode)\n");
}
static enum autochan autochannels = AUTOCHANNELS_DISABLED;
static char *dev_dir_name = NULL;
static char *buf_dir_name = NULL;
static int buffer_idx = 0;
static bool current_trigger_set = false;
static void cleanup(void)
{
int ret;
/* Disable trigger */
if (dev_dir_name && current_trigger_set) {
/* Disconnect the trigger - just write a dummy name. */
ret = write_sysfs_string("trigger/current_trigger",
dev_dir_name, "NULL");
if (ret < 0)
fprintf(stderr, "Failed to disable trigger: %s\n",
strerror(-ret));
current_trigger_set = false;
}
/* Disable buffer */
if (buf_dir_name) {
ret = write_sysfs_int("enable", buf_dir_name, 0);
if (ret < 0)
fprintf(stderr, "Failed to disable buffer: %s\n",
strerror(-ret));
}
/* Disable channels if auto-enabled */
if (dev_dir_name && autochannels == AUTOCHANNELS_ACTIVE) {
ret = enable_disable_all_channels(dev_dir_name, buffer_idx, 0);
if (ret)
fprintf(stderr, "Failed to disable all channels\n");
autochannels = AUTOCHANNELS_DISABLED;
}
}
static void sig_handler(int signum)
{
fprintf(stderr, "Caught signal %d\n", signum);
cleanup();
exit(-signum);
}
static void register_cleanup(void)
{
struct sigaction sa = { .sa_handler = sig_handler };
const int signums[] = { SIGINT, SIGTERM, SIGABRT };
int ret, i;
for (i = 0; i < ARRAY_SIZE(signums); ++i) {
ret = sigaction(signums[i], &sa, NULL);
if (ret) {
perror("Failed to register signal handler");
exit(-1);
}
}
}
static const struct option longopts[] = {
{ "device-name", 1, 0, 'n' },
{ "device-num", 1, 0, 'N' },
{ "trigger-name", 1, 0, 't' },
{ "trigger-num", 1, 0, 'T' },
{ }
};
int main(int argc, char **argv)
{
long long num_loops = 2;
unsigned long timedelay = 1000000;
unsigned long buf_len = 128;
ssize_t i;
unsigned long long j;
unsigned long toread;
int ret, c;
struct stat st;
int fd = -1;
int buf_fd = -1;
int num_channels = 0;
char *trigger_name = NULL, *device_name = NULL;
char *data = NULL;
ssize_t read_size;
int dev_num = -1, trig_num = -1;
char *buffer_access = NULL;
unsigned int scan_size;
int noevents = 0;
int notrigger = 0;
char *dummy;
bool force_autochannels = false;
struct iio_channel_info *channels = NULL;
register_cleanup();
while ((c = getopt_long(argc, argv, "aAb:c:egl:n:N:t:T:w:?", longopts,
NULL)) != -1) {
switch (c) {
case 'a':
autochannels = AUTOCHANNELS_ENABLED;
break;
case 'A':
autochannels = AUTOCHANNELS_ENABLED;
force_autochannels = true;
break;
case 'b':
errno = 0;
buffer_idx = strtoll(optarg, &dummy, 10);
if (errno) {
ret = -errno;
goto error;
}
if (buffer_idx < 0) {
ret = -ERANGE;
goto error;
}
break;
case 'c':
errno = 0;
num_loops = strtoll(optarg, &dummy, 10);
if (errno) {
ret = -errno;
goto error;
}
break;
case 'e':
noevents = 1;
break;
case 'g':
notrigger = 1;
break;
case 'l':
errno = 0;
buf_len = strtoul(optarg, &dummy, 10);
if (errno) {
ret = -errno;
goto error;
}
break;
case 'n':
device_name = strdup(optarg);
break;
case 'N':
errno = 0;
dev_num = strtoul(optarg, &dummy, 10);
if (errno) {
ret = -errno;
goto error;
}
break;
case 't':
trigger_name = strdup(optarg);
break;
case 'T':
errno = 0;
trig_num = strtoul(optarg, &dummy, 10);
if (errno)
return -errno;
break;
case 'w':
errno = 0;
timedelay = strtoul(optarg, &dummy, 10);
if (errno) {
ret = -errno;
goto error;
}
break;
case '?':
print_usage();
ret = -1;
goto error;
}
}
/* Find the device requested */
if (dev_num < 0 && !device_name) {
fprintf(stderr, "Device not set\n");
print_usage();
ret = -1;
goto error;
} else if (dev_num >= 0 && device_name) {
fprintf(stderr, "Only one of --device-num or --device-name needs to be set\n");
print_usage();
ret = -1;
goto error;
} else if (dev_num < 0) {
dev_num = find_type_by_name(device_name, "iio:device");
if (dev_num < 0) {
fprintf(stderr, "Failed to find the %s\n", device_name);
ret = dev_num;
goto error;
}
}
printf("iio device number being used is %d\n", dev_num);
ret = asprintf(&dev_dir_name, "%siio:device%d", iio_dir, dev_num);
if (ret < 0)
return -ENOMEM;
/* Fetch device_name if specified by number */
if (!device_name) {
device_name = malloc(IIO_MAX_NAME_LENGTH);
if (!device_name) {
ret = -ENOMEM;
goto error;
}
ret = read_sysfs_string("name", dev_dir_name, device_name);
if (ret < 0) {
fprintf(stderr, "Failed to read name of device %d\n", dev_num);
goto error;
}
}
if (notrigger) {
printf("trigger-less mode selected\n");
} else if (trig_num >= 0) {
char *trig_dev_name;
ret = asprintf(&trig_dev_name, "%strigger%d", iio_dir, trig_num);
if (ret < 0) {
return -ENOMEM;
}
trigger_name = malloc(IIO_MAX_NAME_LENGTH);
if (!trigger_name) {
ret = -ENOMEM;
goto error;
}
ret = read_sysfs_string("name", trig_dev_name, trigger_name);
free(trig_dev_name);
if (ret < 0) {
fprintf(stderr, "Failed to read trigger%d name from\n", trig_num);
return ret;
}
printf("iio trigger number being used is %d\n", trig_num);
} else {
if (!trigger_name) {
/*
* 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;
}
}
/* Look for this "-devN" trigger */
trig_num = find_type_by_name(trigger_name, "trigger");
if (trig_num < 0) {
/* OK try the simpler "-trigger" suffix instead */
free(trigger_name);
ret = asprintf(&trigger_name,
"%s-trigger", device_name);
if (ret < 0) {
ret = -ENOMEM;
goto error;
}
}
trig_num = find_type_by_name(trigger_name, "trigger");
if (trig_num < 0) {
fprintf(stderr, "Failed to find the trigger %s\n",
trigger_name);
ret = trig_num;
goto error;
}
printf("iio trigger number being used is %d\n", trig_num);
}
/*
* Parse the files in scan_elements to identify what channels are
* present
*/
ret = build_channel_array(dev_dir_name, buffer_idx, &channels, &num_channels);
if (ret) {
fprintf(stderr, "Problem reading scan element information\n"
"diag %s\n", dev_dir_name);
goto error;
}
if (num_channels && autochannels == AUTOCHANNELS_ENABLED &&
!force_autochannels) {
fprintf(stderr, "Auto-channels selected but some channels "
"are already activated in sysfs\n");
fprintf(stderr, "Proceeding without activating any channels\n");
}
if ((!num_channels && autochannels == AUTOCHANNELS_ENABLED) ||
(autochannels == AUTOCHANNELS_ENABLED && force_autochannels)) {
fprintf(stderr, "Enabling all channels\n");
ret = enable_disable_all_channels(dev_dir_name, buffer_idx, 1);
if (ret) {
fprintf(stderr, "Failed to enable all channels\n");
goto error;
}
/* This flags that we need to disable the channels again */
autochannels = AUTOCHANNELS_ACTIVE;
ret = build_channel_array(dev_dir_name, buffer_idx, &channels,
&num_channels);
if (ret) {
fprintf(stderr, "Problem reading scan element "
"information\n"
"diag %s\n", dev_dir_name);
goto error;
}
if (!num_channels) {
fprintf(stderr, "Still no channels after "
"auto-enabling, giving up\n");
goto error;
}
}
if (!num_channels && autochannels == AUTOCHANNELS_DISABLED) {
fprintf(stderr,
"No channels are enabled, we have nothing to scan.\n");
fprintf(stderr, "Enable channels manually in "
FORMAT_SCAN_ELEMENTS_DIR
"/*_en or pass -a to autoenable channels and "
"try again.\n", dev_dir_name, buffer_idx);
ret = -ENOENT;
goto error;
}
/*
* 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%d", iio_dir, dev_num, buffer_idx);
if (ret < 0) {
ret = -ENOMEM;
goto error;
}
if (stat(buf_dir_name, &st)) {
fprintf(stderr, "Could not stat() '%s', got error %d: %s\n",
buf_dir_name, errno, strerror(errno));
ret = -errno;
goto error;
}
if (!S_ISDIR(st.st_mode)) {
fprintf(stderr, "File '%s' is not a directory\n", buf_dir_name);
ret = -EFAULT;
goto error;
}
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) {
fprintf(stderr,
"Failed to write current_trigger file\n");
goto error;
}
}
ret = asprintf(&buffer_access, "/dev/iio:device%d", dev_num);
if (ret < 0) {
ret = -ENOMEM;
goto error;
}
/* Attempt to open non blocking the access dev */
fd = open(buffer_access, O_RDONLY | O_NONBLOCK);
if (fd == -1) { /* TODO: If it isn't there make the node */
ret = -errno;
fprintf(stderr, "Failed to open %s\n", buffer_access);
goto error;
}
/* specify for which buffer index we want an FD */
buf_fd = buffer_idx;
ret = ioctl(fd, IIO_BUFFER_GET_FD_IOCTL, &buf_fd);
if (ret == -1 || buf_fd == -1) {
ret = -errno;
if (ret == -ENODEV || ret == -EINVAL)
fprintf(stderr,
"Device does not have this many buffers\n");
else
fprintf(stderr, "Failed to retrieve buffer fd\n");
goto error;
}
/* Setup ring buffer parameters */
ret = write_sysfs_int("length", buf_dir_name, buf_len);
if (ret < 0)
goto error;
/* Enable the buffer */
ret = write_sysfs_int("enable", buf_dir_name, 1);
if (ret < 0) {
fprintf(stderr,
"Failed to enable buffer '%s': %s\n",
buf_dir_name, strerror(-ret));
goto error;
}
scan_size = size_from_channelarray(channels, num_channels);
size_t total_buf_len = scan_size * buf_len;
if (scan_size > 0 && total_buf_len / scan_size != buf_len) {
ret = -EFAULT;
perror("Integer overflow happened when calculate scan_size * buf_len");
goto error;
}
data = malloc(total_buf_len);
if (!data) {
ret = -ENOMEM;
goto error;
}
/**
* This check is being done here for sanity reasons, however it
* should be omitted under normal operation.
* If this is buffer0, we check that we get EBUSY after this point.
*/
if (buffer_idx == 0) {
errno = 0;
read_size = read(fd, data, 1);
if (read_size > -1 || errno != EBUSY) {
ret = -EFAULT;
perror("Reading from '%s' should not be possible after ioctl()");
goto error;
}
}
/* close now the main chardev FD and let the buffer FD work */
if (close(fd) == -1)
perror("Failed to close character device file");
fd = -1;
for (j = 0; j < num_loops || num_loops < 0; j++) {
if (!noevents) {
struct pollfd pfd = {
.fd = buf_fd,
.events = POLLIN,
};
ret = poll(&pfd, 1, -1);
if (ret < 0) {
ret = -errno;
goto error;
} else if (ret == 0) {
continue;
}
} else {
usleep(timedelay);
}
toread = buf_len;
read_size = read(buf_fd, data, toread * scan_size);
if (read_size < 0) {
if (errno == EAGAIN) {
fprintf(stderr, "nothing available\n");
continue;
} else {
break;
}
}
for (i = 0; i < read_size / scan_size; i++)
process_scan(data + scan_size * i, channels,
num_channels);
}
error:
cleanup();
if (fd >= 0 && close(fd) == -1)
perror("Failed to close character device");
if (buf_fd >= 0 && close(buf_fd) == -1)
perror("Failed to close buffer");
free(buffer_access);
free(data);
free(buf_dir_name);
for (i = num_channels - 1; i >= 0; i--) {
free(channels[i].name);
free(channels[i].generic_name);
}
free(channels);
free(trigger_name);
free(device_name);
free(dev_dir_name);
return ret;
}
linux-7.2.3/tools/iio/iio_utils.c
+988
View File
@@ -0,0 +1,988 @@
// SPDX-License-Identifier: GPL-2.0-only
/* IIO - useful set of util functionality
*
* Copyright (c) 2008 Jonathan Cameron
*/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <dirent.h>
#include <errno.h>
#include <ctype.h>
#include "iio_utils.h"
const char *iio_dir = "/sys/bus/iio/devices/";
static char * const iio_direction[] = {
"in",
"out",
};
/**
* iioutils_break_up_name() - extract generic name from full channel name
* @full_name: the full channel name
* @generic_name: the output generic channel name
*
* Returns 0 on success, or a negative error code if string extraction failed.
**/
int iioutils_break_up_name(const char *full_name, char **generic_name)
{
char *current;
char *w, *r;
char *working, *prefix = "";
int i, ret;
for (i = 0; i < ARRAY_SIZE(iio_direction); i++)
if (!strncmp(full_name, iio_direction[i],
strlen(iio_direction[i]))) {
prefix = iio_direction[i];
break;
}
current = strdup(full_name + strlen(prefix) + 1);
if (!current)
return -ENOMEM;
working = strtok(current, "_\0");
if (!working) {
free(current);
return -EINVAL;
}
w = working;
r = working;
while (*r != '\0') {
if (!isdigit(*r)) {
*w = *r;
w++;
}
r++;
}
*w = '\0';
ret = asprintf(generic_name, "%s_%s", prefix, working);
free(current);
return (ret == -1) ? -ENOMEM : 0;
}
/**
* iioutils_get_type() - find and process _type attribute data
* @format: output channel format
* @bytes: output how many bytes the channel storage occupies
* @bits_used: output number of valid bits of data
* @shift: output amount of bits to shift right data before applying bit mask
* @mask: output a bit mask for the raw data
* @be: output if data in big endian
* @device_dir: the IIO device directory
* @buffer_idx: the IIO buffer index
* @name: the channel name
* @generic_name: the channel type name
*
* Returns a value >= 0 on success, otherwise a negative error code.
**/
static int iioutils_get_type(char *format, unsigned int *bytes,
unsigned int *bits_used, unsigned int *shift,
uint64_t *mask, unsigned int *be,
const char *device_dir, int buffer_idx,
const char *name, const char *generic_name)
{
FILE *sysfsfp;
int ret;
DIR *dp;
char *scan_el_dir, *builtname, *builtname_generic, *filename = 0;
char formatchar, endianchar;
unsigned padint;
const struct dirent *ent;
ret = asprintf(&scan_el_dir, FORMAT_SCAN_ELEMENTS_DIR, device_dir, buffer_idx);
if (ret < 0)
return -ENOMEM;
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) {
ret = -errno;
goto error_free_builtname_generic;
}
ret = -ENOENT;
while (ent = readdir(dp), ent)
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) {
ret = -errno;
fprintf(stderr, "failed to open %s\n",
filename);
goto error_free_filename;
}
ret = fscanf(sysfsfp,
"%ce:%c%u/%u>>%u",
&endianchar,
&formatchar,
bits_used,
&padint, shift);
if (ret < 0) {
ret = -errno;
fprintf(stderr,
"failed to pass scan type description\n");
goto error_close_sysfsfp;
} else if (ret != 5) {
ret = -EIO;
fprintf(stderr,
"scan type description didn't match\n");
goto error_close_sysfsfp;
}
*be = (endianchar == 'b');
*bytes = padint / 8;
if (*bits_used == 64)
*mask = ~(0ULL);
else
*mask = (1ULL << *bits_used) - 1ULL;
*format = formatchar;
if (fclose(sysfsfp)) {
ret = -errno;
fprintf(stderr, "Failed to close %s\n",
filename);
goto error_free_filename;
}
sysfsfp = 0;
free(filename);
filename = 0;
/*
* Avoid having a more generic entry overwriting
* the settings.
*/
if (strcmp(builtname, ent->d_name) == 0)
break;
}
error_close_sysfsfp:
if (sysfsfp)
if (fclose(sysfsfp))
perror("iioutils_get_type(): Failed to close file");
error_free_filename:
if (filename)
free(filename);
error_closedir:
if (closedir(dp) == -1)
perror("iioutils_get_type(): Failed to close directory");
error_free_builtname_generic:
free(builtname_generic);
error_free_builtname:
free(builtname);
error_free_scan_el_dir:
free(scan_el_dir);
return ret;
}
/**
* iioutils_get_param_float() - read a float value from a channel parameter
* @output: output the float value
* @param_name: the parameter name to read
* @device_dir: the IIO device directory in sysfs
* @name: the channel name
* @generic_name: the channel type name
*
* Returns a value >= 0 on success, otherwise a negative error code.
**/
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)
return -ENOMEM;
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) {
ret = -errno;
goto error_free_builtname_generic;
}
ret = -ENOENT;
while (ent = readdir(dp), ent)
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;
}
errno = 0;
if (fscanf(sysfsfp, "%f", output) != 1)
ret = errno ? -errno : -ENODATA;
fclose(sysfsfp);
break;
}
error_free_filename:
if (filename)
free(filename);
error_closedir:
if (closedir(dp) == -1)
perror("iioutils_get_param_float(): Failed to close directory");
error_free_builtname_generic:
free(builtname_generic);
error_free_builtname:
free(builtname);
return ret;
}
/**
* bsort_channel_array_by_index() - sort the array in index order
* @ci_array: the iio_channel_info array to be sorted
* @cnt: the amount of array elements
**/
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
* @buffer_idx: the IIO buffer for this channel array
* @ci_array: output the resulting array of iio_channel_info
* @counter: output the amount of array elements
*
* Returns 0 on success, otherwise a negative error code.
**/
int build_channel_array(const char *device_dir, int buffer_idx,
struct iio_channel_info **ci_array, int *counter)
{
DIR *dp;
FILE *sysfsfp;
int count = 0, 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, buffer_idx);
if (ret < 0)
return -ENOMEM;
dp = opendir(scan_el_dir);
if (!dp) {
ret = -errno;
goto error_free_name;
}
while (ent = readdir(dp), ent)
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");
free(filename);
if (!sysfsfp) {
ret = -errno;
goto error_close_dir;
}
errno = 0;
if (fscanf(sysfsfp, "%i", &ret) != 1) {
ret = errno ? -errno : -ENODATA;
if (fclose(sysfsfp))
perror("build_channel_array(): Failed to close file");
goto error_close_dir;
}
if (ret == 1)
(*counter)++;
if (fclose(sysfsfp)) {
ret = -errno;
goto error_close_dir;
}
}
*ci_array = malloc(sizeof(**ci_array) * (*counter));
if (!*ci_array) {
ret = -ENOMEM;
goto error_close_dir;
}
rewinddir(dp);
while (ent = readdir(dp), ent) {
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");
free(filename);
if (!sysfsfp) {
ret = -errno;
count--;
goto error_cleanup_array;
}
errno = 0;
if (fscanf(sysfsfp, "%i", &current_enabled) != 1) {
ret = errno ? -errno : -ENODATA;
count--;
goto error_cleanup_array;
}
if (fclose(sysfsfp)) {
ret = -errno;
count--;
goto error_cleanup_array;
}
if (!current_enabled) {
count--;
continue;
}
current->scale = 1.0;
current->offset = 0;
current->name = strndup(ent->d_name,
strlen(ent->d_name) -
strlen("_en"));
if (!current->name) {
ret = -ENOMEM;
count--;
goto error_cleanup_array;
}
/* Get the generic and specific name elements */
ret = iioutils_break_up_name(current->name,
&current->generic_name);
if (ret) {
free(current->name);
count--;
goto error_cleanup_array;
}
ret = asprintf(&filename,
"%s/%s_index",
scan_el_dir,
current->name);
if (ret < 0) {
ret = -ENOMEM;
goto error_cleanup_array;
}
sysfsfp = fopen(filename, "r");
free(filename);
if (!sysfsfp) {
ret = -errno;
fprintf(stderr, "failed to open %s/%s_index\n",
scan_el_dir, current->name);
goto error_cleanup_array;
}
errno = 0;
if (fscanf(sysfsfp, "%u", &current->index) != 1) {
ret = errno ? -errno : -ENODATA;
if (fclose(sysfsfp))
perror("build_channel_array(): Failed to close file");
goto error_cleanup_array;
}
if (fclose(sysfsfp)) {
ret = -errno;
goto error_cleanup_array;
}
/* Find the scale */
ret = iioutils_get_param_float(&current->scale,
"scale",
device_dir,
current->name,
current->generic_name);
if ((ret < 0) && (ret != -ENOENT))
goto error_cleanup_array;
ret = iioutils_get_param_float(&current->offset,
"offset",
device_dir,
current->name,
current->generic_name);
if ((ret < 0) && (ret != -ENOENT))
goto error_cleanup_array;
ret = iioutils_get_type(&current->format,
&current->bytes,
&current->bits_used,
&current->shift,
&current->mask,
&current->be,
device_dir,
buffer_idx,
current->name,
current->generic_name);
if (ret < 0)
goto error_cleanup_array;
}
}
if (closedir(dp) == -1) {
ret = -errno;
goto error_cleanup_array;
}
free(scan_el_dir);
/* 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)[i].generic_name);
}
free(*ci_array);
*ci_array = NULL;
*counter = 0;
error_close_dir:
if (dp)
if (closedir(dp) == -1)
perror("build_channel_array(): Failed to close dir");
error_free_name:
free(scan_el_dir);
return ret;
}
static int calc_digits(int num)
{
int count = 0;
/* It takes a digit to represent zero */
if (!num)
return 1;
while (num != 0) {
num /= 10;
count++;
}
return count;
}
/**
* 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 searched
*
* Returns the device number of a matched IIO device on success, otherwise a
* negative error code.
* 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, ret;
FILE *namefp;
DIR *dp;
char thisname[IIO_MAX_NAME_LENGTH];
char *filename;
dp = opendir(iio_dir);
if (!dp) {
fprintf(stderr, "No industrialio devices available\n");
return -ENODEV;
}
while (ent = readdir(dp), ent) {
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) {
errno = 0;
ret = sscanf(ent->d_name + strlen(type), "%d", &number);
if (ret < 0) {
ret = -errno;
fprintf(stderr,
"failed to read element number\n");
goto error_close_dir;
} else if (ret != 1) {
ret = -EIO;
fprintf(stderr,
"failed to match element number\n");
goto error_close_dir;
}
numstrlen = calc_digits(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) {
ret = -ENOMEM;
goto error_close_dir;
}
ret = sprintf(filename, "%s%s%d/name", iio_dir,
type, number);
if (ret < 0) {
free(filename);
goto error_close_dir;
}
namefp = fopen(filename, "r");
if (!namefp) {
free(filename);
continue;
}
free(filename);
errno = 0;
if (fscanf(namefp, "%s", thisname) != 1) {
ret = errno ? -errno : -ENODATA;
goto error_close_dir;
}
if (fclose(namefp)) {
ret = -errno;
goto error_close_dir;
}
if (strcmp(name, thisname) == 0) {
if (closedir(dp) == -1)
return -errno;
return number;
}
}
}
}
if (closedir(dp) == -1)
return -errno;
return -ENODEV;
error_close_dir:
if (closedir(dp) == -1)
perror("find_type_by_name(): Failed to close directory");
return ret;
}
static int _write_sysfs_int(const char *filename, const char *basedir, int val,
int verify)
{
int ret = 0;
FILE *sysfsfp;
int test;
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (!temp)
return -ENOMEM;
ret = sprintf(temp, "%s/%s", basedir, filename);
if (ret < 0)
goto error_free;
sysfsfp = fopen(temp, "w");
if (!sysfsfp) {
ret = -errno;
fprintf(stderr, "failed to open %s\n", temp);
goto error_free;
}
ret = fprintf(sysfsfp, "%d", val);
if (ret < 0) {
if (fclose(sysfsfp))
perror("_write_sysfs_int(): Failed to close dir");
goto error_free;
}
if (fclose(sysfsfp)) {
ret = -errno;
goto error_free;
}
if (verify) {
sysfsfp = fopen(temp, "r");
if (!sysfsfp) {
ret = -errno;
fprintf(stderr, "failed to open %s\n", temp);
goto error_free;
}
if (fscanf(sysfsfp, "%d", &test) != 1) {
ret = errno ? -errno : -ENODATA;
if (fclose(sysfsfp))
perror("_write_sysfs_int(): Failed to close dir");
goto error_free;
}
if (fclose(sysfsfp)) {
ret = -errno;
goto error_free;
}
if (test != val) {
fprintf(stderr,
"Possible failure in int write %d to %s/%s\n",
val, basedir, filename);
ret = -1;
}
}
error_free:
free(temp);
return ret;
}
/**
* write_sysfs_int() - write an integer value to a sysfs file
* @filename: name of the file to write to
* @basedir: the sysfs directory in which the file is to be found
* @val: integer value to write to file
*
* Returns a value >= 0 on success, otherwise a negative error code.
**/
int write_sysfs_int(const char *filename, const char *basedir, int val)
{
return _write_sysfs_int(filename, basedir, val, 0);
}
/**
* write_sysfs_int_and_verify() - write an integer value to a sysfs file
* and verify
* @filename: name of the file to write to
* @basedir: the sysfs directory in which the file is to be found
* @val: integer value to write to file
*
* Returns a value >= 0 on success, otherwise a negative error code.
**/
int write_sysfs_int_and_verify(const char *filename, const char *basedir,
int val)
{
return _write_sysfs_int(filename, basedir, val, 1);
}
static int _write_sysfs_string(const char *filename, const char *basedir,
const char *val, int verify)
{
int ret = 0;
FILE *sysfsfp;
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (!temp) {
fprintf(stderr, "Memory allocation failed\n");
return -ENOMEM;
}
ret = sprintf(temp, "%s/%s", basedir, filename);
if (ret < 0)
goto error_free;
sysfsfp = fopen(temp, "w");
if (!sysfsfp) {
ret = -errno;
fprintf(stderr, "Could not open %s\n", temp);
goto error_free;
}
ret = fprintf(sysfsfp, "%s", val);
if (ret < 0) {
if (fclose(sysfsfp))
perror("_write_sysfs_string(): Failed to close dir");
goto error_free;
}
if (fclose(sysfsfp)) {
ret = -errno;
goto error_free;
}
if (verify) {
sysfsfp = fopen(temp, "r");
if (!sysfsfp) {
ret = -errno;
fprintf(stderr, "Could not open file to verify\n");
goto error_free;
}
if (fscanf(sysfsfp, "%s", temp) != 1) {
ret = errno ? -errno : -ENODATA;
if (fclose(sysfsfp))
perror("_write_sysfs_string(): Failed to close dir");
goto error_free;
}
if (fclose(sysfsfp)) {
ret = -errno;
goto error_free;
}
if (strcmp(temp, val) != 0) {
fprintf(stderr,
"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
*
* Returns a value >= 0 on success, otherwise a negative error code.
**/
int write_sysfs_string_and_verify(const char *filename, const char *basedir,
const char *val)
{
return _write_sysfs_string(filename, basedir, val, 1);
}
/**
* write_sysfs_string() - write string to a sysfs file
* @filename: name of file to write to
* @basedir: the sysfs directory in which the file is to be found
* @val: the string to write
*
* Returns a value >= 0 on success, otherwise a negative error code.
**/
int write_sysfs_string(const char *filename, const char *basedir,
const char *val)
{
return _write_sysfs_string(filename, basedir, val, 0);
}
/**
* read_sysfs_posint() - read an integer value from file
* @filename: name of file to read from
* @basedir: the sysfs directory in which the file is to be found
*
* Returns the read integer value >= 0 on success, otherwise a negative error
* code.
**/
int read_sysfs_posint(const char *filename, const char *basedir)
{
int ret;
FILE *sysfsfp;
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (!temp) {
fprintf(stderr, "Memory allocation failed");
return -ENOMEM;
}
ret = sprintf(temp, "%s/%s", basedir, filename);
if (ret < 0)
goto error_free;
sysfsfp = fopen(temp, "r");
if (!sysfsfp) {
ret = -errno;
goto error_free;
}
errno = 0;
if (fscanf(sysfsfp, "%d\n", &ret) != 1) {
ret = errno ? -errno : -ENODATA;
if (fclose(sysfsfp))
perror("read_sysfs_posint(): Failed to close dir");
goto error_free;
}
if (fclose(sysfsfp))
ret = -errno;
error_free:
free(temp);
return ret;
}
/**
* read_sysfs_float() - read a float value from file
* @filename: name of file to read from
* @basedir: the sysfs directory in which the file is to be found
* @val: output the read float value
*
* Returns a value >= 0 on success, otherwise a negative error code.
**/
int read_sysfs_float(const char *filename, const char *basedir, float *val)
{
int ret = 0;
FILE *sysfsfp;
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (!temp) {
fprintf(stderr, "Memory allocation failed");
return -ENOMEM;
}
ret = sprintf(temp, "%s/%s", basedir, filename);
if (ret < 0)
goto error_free;
sysfsfp = fopen(temp, "r");
if (!sysfsfp) {
ret = -errno;
goto error_free;
}
errno = 0;
if (fscanf(sysfsfp, "%f\n", val) != 1) {
ret = errno ? -errno : -ENODATA;
if (fclose(sysfsfp))
perror("read_sysfs_float(): Failed to close dir");
goto error_free;
}
if (fclose(sysfsfp))
ret = -errno;
error_free:
free(temp);
return ret;
}
/**
* read_sysfs_string() - read a string from file
* @filename: name of file to read from
* @basedir: the sysfs directory in which the file is to be found
* @str: output the read string
*
* Returns a value >= 0 on success, otherwise a negative error code.
**/
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) {
fprintf(stderr, "Memory allocation failed");
return -ENOMEM;
}
ret = sprintf(temp, "%s/%s", basedir, filename);
if (ret < 0)
goto error_free;
sysfsfp = fopen(temp, "r");
if (!sysfsfp) {
ret = -errno;
goto error_free;
}
errno = 0;
if (fscanf(sysfsfp, "%s\n", str) != 1) {
ret = errno ? -errno : -ENODATA;
if (fclose(sysfsfp))
perror("read_sysfs_string(): Failed to close dir");
goto error_free;
}
if (fclose(sysfsfp))
ret = -errno;
error_free:
free(temp);
return ret;
}
linux-7.2.3/tools/iio/iio_utils.h
+79
View File
@@ -0,0 +1,79 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef _IIO_UTILS_H_
#define _IIO_UTILS_H_
/* IIO - useful set of util functionality
*
* Copyright (c) 2008 Jonathan Cameron
*/
#include <stdint.h>
/* Made up value to limit allocation sizes */
#define IIO_MAX_NAME_LENGTH 64
#define FORMAT_SCAN_ELEMENTS_DIR "%s/buffer%d"
#define FORMAT_EVENTS_DIR "%s/events"
#define FORMAT_TYPE_FILE "%s_type"
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
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
* @bits_used: number of valid bits of data
* @shift: amount of bits to shift right data before applying bit mask
* @mask: a bit mask for the raw output
* @be: flag if data is big endian
* @format: format of the raw value
* @location: data offset for this channel inside the buffer (in bytes)
**/
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;
char format;
unsigned location;
};
static inline int iioutils_check_suffix(const char *str, const char *suffix)
{
return strlen(str) >= strlen(suffix) &&
strncmp(str+strlen(str)-strlen(suffix),
suffix, strlen(suffix)) == 0;
}
int iioutils_break_up_name(const char *full_name, 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, int buffer_idx,
struct iio_channel_info **ci_array, int *counter);
int find_type_by_name(const char *name, const char *type);
int write_sysfs_int(const char *filename, const char *basedir, int val);
int write_sysfs_int_and_verify(const char *filename, const char *basedir,
int val);
int write_sysfs_string_and_verify(const char *filename, const char *basedir,
const char *val);
int write_sysfs_string(const char *filename, const char *basedir,
const char *val);
int read_sysfs_posint(const char *filename, const char *basedir);
int read_sysfs_float(const char *filename, const char *basedir, float *val);
int read_sysfs_string(const char *filename, const char *basedir, char *str);
#endif /* _IIO_UTILS_H_ */
linux-7.2.3/tools/iio/lsiio.c
+188
View File
@@ -0,0 +1,188 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Industrial I/O utilities - lsiio.c
*
* Copyright (c) 2010 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
*/
#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)
return -errno;
while (ent = readdir(dp), ent)
if (check_prefix(ent->d_name, "in_") &&
(check_postfix(ent->d_name, "_raw") ||
check_postfix(ent->d_name, "_input")))
printf(" %-10s\n", ent->d_name);
return (closedir(dp) == -1) ? -errno : 0;
}
static int dump_one_device(const char *dev_dir_name)
{
char name[IIO_MAX_NAME_LENGTH];
int dev_idx;
int ret;
ret = sscanf(dev_dir_name + strlen(iio_dir) + strlen(type_device), "%i",
&dev_idx);
if (ret != 1)
return -EINVAL;
ret = read_sysfs_string("name", dev_dir_name, name);
if (ret < 0)
return ret;
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 ret;
ret = sscanf(dev_dir_name + strlen(iio_dir) + strlen(type_trigger),
"%i", &dev_idx);
if (ret != 1)
return -EINVAL;
ret = read_sysfs_string("name", dev_dir_name, name);
if (ret < 0)
return ret;
printf("Trigger %03d: %s\n", dev_idx, name);
return 0;
}
static int dump_devices(void)
{
const struct dirent *ent;
int ret;
DIR *dp;
dp = opendir(iio_dir);
if (!dp) {
fprintf(stderr, "No industrial I/O devices available\n");
return -ENODEV;
}
while (ent = readdir(dp), ent) {
if (check_prefix(ent->d_name, type_device)) {
char *dev_dir_name;
if (asprintf(&dev_dir_name, "%s%s", iio_dir,
ent->d_name) < 0) {
ret = -ENOMEM;
goto error_close_dir;
}
ret = dump_one_device(dev_dir_name);
if (ret) {
free(dev_dir_name);
goto error_close_dir;
}
free(dev_dir_name);
if (verblevel >= VERBLEVEL_SENSORS)
printf("\n");
}
}
rewinddir(dp);
while (ent = readdir(dp), ent) {
if (check_prefix(ent->d_name, type_trigger)) {
char *dev_dir_name;
if (asprintf(&dev_dir_name, "%s%s", iio_dir,
ent->d_name) < 0) {
ret = -ENOMEM;
goto error_close_dir;
}
ret = dump_one_trigger(dev_dir_name);
if (ret) {
free(dev_dir_name);
goto error_close_dir;
}
free(dev_dir_name);
}
}
return (closedir(dp) == -1) ? -errno : 0;
error_close_dir:
if (closedir(dp) == -1)
perror("dump_devices(): Failed to close directory");
return ret;
}
int main(int argc, char **argv)
{
int c, err = 0;
while ((c = getopt(argc, argv, "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 Increase verbosity (may be given multiple times)\n");
exit(1);
}
return dump_devices();
}