diff options
Diffstat (limited to 'tools/iio')
| -rw-r--r-- | tools/iio/Build | 3 | ||||
| -rw-r--r-- | tools/iio/Makefile | 66 | ||||
| -rw-r--r-- | tools/iio/iio_event_monitor.c | 358 | ||||
| -rw-r--r-- | tools/iio/iio_generic_buffer.c | 693 | ||||
| -rw-r--r-- | tools/iio/iio_utils.c | 994 | ||||
| -rw-r--r-- | tools/iio/iio_utils.h | 85 | ||||
| -rw-r--r-- | tools/iio/lsiio.c | 191 |
7 files changed, 2390 insertions, 0 deletions
diff --git a/tools/iio/Build b/tools/iio/Build new file mode 100644 index 000000000..f74cbda64 --- /dev/null +++ b/tools/iio/Build @@ -0,0 +1,3 @@ +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 diff --git a/tools/iio/Makefile b/tools/iio/Makefile new file mode 100644 index 000000000..332ed2f6c --- /dev/null +++ b/tools/iio/Makefile @@ -0,0 +1,66 @@ +# SPDX-License-Identifier: GPL-2.0 +include ../scripts/Makefile.include + +bindir ?= /usr/bin + +ifeq ($(srctree),) +srctree := $(patsubst %/,%,$(dir $(CURDIR))) +srctree := $(patsubst %/,%,$(dir $(srctree))) +endif + +# Do not use make's built-in rules +# (this improves performance and avoids hard-to-debug behaviour); +MAKEFLAGS += -r + +CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(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/events.h $@ + ln -sf $(CURDIR)/../../include/uapi/linux/iio/types.h $@ + +prepare: $(OUTPUT)include/linux/iio + +LSIIO_IN := $(OUTPUT)lsiio-in.o +$(LSIIO_IN): prepare FORCE + $(Q)$(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 + $(Q)$(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 + $(Q)$(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 $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -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 diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c new file mode 100644 index 000000000..ac2de6b7e --- /dev/null +++ b/tools/iio/iio_event_monitor.c @@ -0,0 +1,358 @@ +/* Industrialio event test code. + * + * Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is primarily intended as an example application. + * Reads the current buffer setup from sysfs and starts a short capture + * from the specified device, pretty printing the result after appropriate + * conversion. + * + * Usage: + * iio_event_monitor <device_name> + */ + +#include <unistd.h> +#include <stdlib.h> +#include <stdbool.h> +#include <stdio.h> +#include <errno.h> +#include <string.h> +#include <poll.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include "iio_utils.h" +#include <linux/iio/events.h> +#include <linux/iio/types.h> + +static const char * const iio_chan_type_name_spec[] = { + [IIO_VOLTAGE] = "voltage", + [IIO_CURRENT] = "current", + [IIO_POWER] = "power", + [IIO_ACCEL] = "accel", + [IIO_ANGL_VEL] = "anglvel", + [IIO_MAGN] = "magn", + [IIO_LIGHT] = "illuminance", + [IIO_INTENSITY] = "intensity", + [IIO_PROXIMITY] = "proximity", + [IIO_TEMP] = "temp", + [IIO_INCLI] = "incli", + [IIO_ROT] = "rot", + [IIO_ANGL] = "angl", + [IIO_TIMESTAMP] = "timestamp", + [IIO_CAPACITANCE] = "capacitance", + [IIO_ALTVOLTAGE] = "altvoltage", + [IIO_CCT] = "cct", + [IIO_PRESSURE] = "pressure", + [IIO_HUMIDITYRELATIVE] = "humidityrelative", + [IIO_ACTIVITY] = "activity", + [IIO_STEPS] = "steps", + [IIO_ENERGY] = "energy", + [IIO_DISTANCE] = "distance", + [IIO_VELOCITY] = "velocity", + [IIO_CONCENTRATION] = "concentration", + [IIO_RESISTANCE] = "resistance", + [IIO_PH] = "ph", + [IIO_UVINDEX] = "uvindex", + [IIO_GRAVITY] = "gravity", + [IIO_POSITIONRELATIVE] = "positionrelative", + [IIO_PHASE] = "phase", +}; + +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_LIGHT_UV] = "uv", + [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_VOC] = "voc", +}; + +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: + 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_VOC: + break; + default: + return false; + } + + switch (ev_type) { + case IIO_EV_TYPE_THRESH: + case IIO_EV_TYPE_MAG: + case IIO_EV_TYPE_ROC: + case IIO_EV_TYPE_THRESH_ADAPTIVE: + case IIO_EV_TYPE_MAG_ADAPTIVE: + case IIO_EV_TYPE_CHANGE: + break; + default: + return false; + } + + switch (dir) { + case IIO_EV_DIR_EITHER: + case IIO_EV_DIR_RISING: + case IIO_EV_DIR_FALLING: + case IIO_EV_DIR_NONE: + break; + default: + return false; + } + + return true; +} + +static void print_event(struct iio_event_data *event) +{ + enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id); + enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id); + enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id); + enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id); + int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id); + int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id); + bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id); + + if (!event_is_known(event)) { + fprintf(stderr, "Unknown event: time: %lld, id: %llx\n", + event->timestamp, event->id); + + return; + } + + printf("Event: time: %lld, type: %s", event->timestamp, + iio_chan_type_name_spec[type]); + + if (mod != IIO_NO_MOD) + printf("(%s)", iio_modifier_names[mod]); + + if (chan >= 0) { + printf(", channel: %d", chan); + if (diff && chan2 >= 0) + printf("-%d", chan2); + } + + printf(", evtype: %s", iio_ev_type_text[ev_type]); + + if (dir != IIO_EV_DIR_NONE) + printf(", direction: %s", iio_ev_dir_text[dir]); + + printf("\n"); +} + +int main(int argc, char **argv) +{ + struct iio_event_data event; + const char *device_name; + char *chrdev_name; + int ret; + int dev_num; + int fd, event_fd; + + if (argc <= 1) { + fprintf(stderr, "Usage: %s <device_name>\n", argv[0]); + return -1; + } + + device_name = argv[1]; + + dev_num = find_type_by_name(device_name, "iio:device"); + if (dev_num >= 0) { + printf("Found IIO device with name %s with device number %d\n", + device_name, dev_num); + ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num); + if (ret < 0) + return -ENOMEM; + } else { + /* + * If we can't find an IIO device by name assume device_name is + * an IIO chrdev + */ + chrdev_name = strdup(device_name); + if (!chrdev_name) + return -ENOMEM; + } + + fd = open(chrdev_name, 0); + if (fd == -1) { + ret = -errno; + fprintf(stderr, "Failed to open %s\n", chrdev_name); + goto error_free_chrdev_name; + } + + ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd); + if (ret == -1 || event_fd == -1) { + ret = -errno; + if (ret == -ENODEV) + fprintf(stderr, + "This device does not support events\n"); + else + fprintf(stderr, "Failed to retrieve event fd\n"); + if (close(fd) == -1) + perror("Failed to close character device file"); + + goto error_free_chrdev_name; + } + + if (close(fd) == -1) { + ret = -errno; + goto error_free_chrdev_name; + } + + while (true) { + ret = read(event_fd, &event, sizeof(event)); + if (ret == -1) { + if (errno == EAGAIN) { + fprintf(stderr, "nothing available\n"); + continue; + } else { + ret = -errno; + perror("Failed to read event from device"); + break; + } + } + + if (ret != sizeof(event)) { + fprintf(stderr, "Reading event failed!\n"); + ret = -EIO; + break; + } + + print_event(&event); + } + + if (close(event_fd) == -1) + perror("Failed to close event file"); + +error_free_chrdev_name: + free(chrdev_name); + + return ret; +} diff --git a/tools/iio/iio_generic_buffer.c b/tools/iio/iio_generic_buffer.c new file mode 100644 index 000000000..84545666a --- /dev/null +++ b/tools/iio/iio_generic_buffer.c @@ -0,0 +1,693 @@ +/* Industrialio buffer test code. + * + * Copyright (c) 2008 Jonathan Cameron + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is primarily intended as an example application. + * Reads the current buffer setup from sysfs and starts a short capture + * from the specified device, pretty printing the result after appropriate + * conversion. + * + * Command line parameters + * generic_buffer -n <device_name> -t <trigger_name> + * If trigger name is not specified the program assumes you want a dataready + * trigger associated with the device and goes looking for it. + * + */ + +#include <unistd.h> +#include <stdlib.h> +#include <dirent.h> +#include <fcntl.h> +#include <stdio.h> +#include <errno.h> +#include <sys/stat.h> +#include <sys/dir.h> +#include <linux/types.h> +#include <string.h> +#include <poll.h> +#include <endian.h> +#include <getopt.h> +#include <inttypes.h> +#include <stdbool.h> +#include <signal.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. + **/ +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 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; + if (info->is_signed) { + int8_t val = (int8_t)(input << (8 - info->bits_used)) >> + (8 - info->bits_used); + printf("%05f ", ((float)val + info->offset) * info->scale); + } else { + printf("%05f ", ((float)input + info->offset) * info->scale); + } +} + +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; + if (info->is_signed) { + int16_t val = (int16_t)(input << (16 - info->bits_used)) >> + (16 - info->bits_used); + printf("%05f ", ((float)val + info->offset) * info->scale); + } else { + printf("%05f ", ((float)input + info->offset) * info->scale); + } +} + +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; + if (info->is_signed) { + int32_t val = (int32_t)(input << (32 - info->bits_used)) >> + (32 - info->bits_used); + printf("%05f ", ((float)val + info->offset) * info->scale); + } else { + printf("%05f ", ((float)input + info->offset) * info->scale); + } +} + +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; + if (info->is_signed) { + 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); + } else { + printf("%05f ", ((float)input + 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 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 enable) +{ + const struct dirent *ent; + char scanelemdir[256]; + DIR *dp; + int ret; + + snprintf(scanelemdir, sizeof(scanelemdir), + FORMAT_SCAN_ELEMENTS_DIR, dev_dir_name); + 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; +} + +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" + " -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"); +} + +enum autochan autochannels = AUTOCHANNELS_DISABLED; +char *dev_dir_name = NULL; +char *buf_dir_name = NULL; +bool current_trigger_set = false; + +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, 0); + if (ret) + fprintf(stderr, "Failed to disable all channels\n"); + autochannels = AUTOCHANNELS_DISABLED; + } +} + +void sig_handler(int signum) +{ + fprintf(stderr, "Caught signal %d\n", signum); + cleanup(); + exit(-signum); +} + +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; + int fp = -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; + 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, "aAc: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 '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); + 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, &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, 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, &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); + 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", iio_dir, dev_num); + if (ret < 0) { + ret = -ENOMEM; + 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; + } + } + + /* 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\n", strerror(-ret)); + goto error; + } + + scan_size = size_from_channelarray(channels, num_channels); + data = malloc(scan_size * buf_len); + if (!data) { + ret = -ENOMEM; + 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 */ + fp = open(buffer_access, O_RDONLY | O_NONBLOCK); + if (fp == -1) { /* TODO: If it isn't there make the node */ + ret = -errno; + fprintf(stderr, "Failed to open %s\n", buffer_access); + goto error; + } + + for (j = 0; j < num_loops || num_loops < 0; j++) { + if (!noevents) { + struct pollfd pfd = { + .fd = fp, + .events = POLLIN, + }; + + ret = poll(&pfd, 1, -1); + if (ret < 0) { + ret = -errno; + goto error; + } else if (ret == 0) { + continue; + } + + toread = buf_len; + } else { + usleep(timedelay); + toread = 64; + } + + read_size = read(fp, 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 (fp >= 0 && close(fp) == -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; +} diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c new file mode 100644 index 000000000..55272fef3 --- /dev/null +++ b/tools/iio/iio_utils.c @@ -0,0 +1,994 @@ +/* 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/"; + +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 + * @is_signed: output whether channel is signed + * @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 + * @name: the channel name + * @generic_name: the channel type name + * + * Returns a value >= 0 on success, otherwise a negative error code. + **/ +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) + 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, + &signchar, + 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; + + *is_signed = (signchar == 's'); + 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; + + 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 + * @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, + 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); + 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"); + if (!sysfsfp) { + ret = -errno; + free(filename); + 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"); + + free(filename); + goto error_close_dir; + } + if (ret == 1) + (*counter)++; + + if (fclose(sysfsfp)) { + ret = -errno; + free(filename); + goto error_close_dir; + } + + free(filename); + } + + *ci_array = malloc(sizeof(**ci_array) * (*counter)); + if (!*ci_array) { + ret = -ENOMEM; + goto error_close_dir; + } + + seekdir(dp, 0); + 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"); + if (!sysfsfp) { + ret = -errno; + free(filename); + count--; + goto error_cleanup_array; + } + + errno = 0; + if (fscanf(sysfsfp, "%i", ¤t_enabled) != 1) { + ret = errno ? -errno : -ENODATA; + free(filename); + count--; + goto error_cleanup_array; + } + + if (fclose(sysfsfp)) { + ret = -errno; + free(filename); + count--; + goto error_cleanup_array; + } + + 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) { + free(filename); + ret = -ENOMEM; + count--; + goto error_cleanup_array; + } + + /* Get the generic and specific name elements */ + ret = iioutils_break_up_name(current->name, + ¤t->generic_name); + if (ret) { + free(filename); + free(current->name); + count--; + 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"); + if (!sysfsfp) { + ret = -errno; + fprintf(stderr, "failed to open %s\n", + filename); + free(filename); + goto error_cleanup_array; + } + + errno = 0; + if (fscanf(sysfsfp, "%u", ¤t->index) != 1) { + ret = errno ? -errno : -ENODATA; + if (fclose(sysfsfp)) + perror("build_channel_array(): Failed to close file"); + + free(filename); + goto error_cleanup_array; + } + + if (fclose(sysfsfp)) { + ret = -errno; + free(filename); + goto error_cleanup_array; + } + + free(filename); + /* Find the scale */ + ret = iioutils_get_param_float(¤t->scale, + "scale", + device_dir, + current->name, + current->generic_name); + if ((ret < 0) && (ret != -ENOENT)) + goto error_cleanup_array; + + ret = iioutils_get_param_float(¤t->offset, + "offset", + device_dir, + current->name, + current->generic_name); + if ((ret < 0) && (ret != -ENOENT)) + goto error_cleanup_array; + + ret = iioutils_get_type(¤t->is_signed, + ¤t->bytes, + ¤t->bits_used, + ¤t->shift, + ¤t->mask, + ¤t->be, + device_dir, + current->name, + current->generic_name); + 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; + + 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; +} diff --git a/tools/iio/iio_utils.h b/tools/iio/iio_utils.h new file mode 100644 index 000000000..8b379da26 --- /dev/null +++ b/tools/iio/iio_utils.h @@ -0,0 +1,85 @@ +#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 64 + +#define FORMAT_SCAN_ELEMENTS_DIR "%s/scan_elements" +#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 + * @is_signed: is the raw value stored signed + * @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; + unsigned is_signed; + 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_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(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_ */ diff --git a/tools/iio/lsiio.c b/tools/iio/lsiio.c new file mode 100644 index 000000000..ab0f5cf16 --- /dev/null +++ b/tools/iio/lsiio.c @@ -0,0 +1,191 @@ +/* + * 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) + 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(); +} |