diff options
Diffstat (limited to 'tools/iio')
| -rw-r--r-- | tools/iio/generic_buffer.c | 102 | ||||
| -rw-r--r-- | tools/iio/iio_utils.h | 7 |
2 files changed, 105 insertions, 4 deletions
diff --git a/tools/iio/generic_buffer.c b/tools/iio/generic_buffer.c index c42b7f836b48..2429c78de940 100644 --- a/tools/iio/generic_buffer.c +++ b/tools/iio/generic_buffer.c @@ -35,6 +35,15 @@ #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 @@ -191,10 +200,51 @@ void process_scan(char *data, 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" " -c <n> Do n conversions\n" " -e Disable wait for event (new data)\n" " -g Use trigger-less mode\n" @@ -225,12 +275,16 @@ int main(int argc, char **argv) int scan_size; int noevents = 0; int notrigger = 0; + enum autochan autochannels = AUTOCHANNELS_DISABLED; char *dummy; struct iio_channel_info *channels; - while ((c = getopt(argc, argv, "c:egl:n:t:w:")) != -1) { + while ((c = getopt(argc, argv, "ac:egl:n:t:w:")) != -1) { switch (c) { + case 'a': + autochannels = AUTOCHANNELS_ENABLED; + break; case 'c': errno = 0; num_loops = strtoul(optarg, &dummy, 10); @@ -340,12 +394,47 @@ int main(int argc, char **argv) "diag %s\n", dev_dir_name); goto error_free_triggername; } - if (!num_channels) { + if (num_channels && autochannels == AUTOCHANNELS_ENABLED) { + 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) { + fprintf(stderr, + "No channels are enabled, 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_free_triggername; + } + + /* 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_disable_channels; + } + if (!num_channels) { + fprintf(stderr, "Still no channels after " + "auto-enabling, giving up\n"); + goto error_disable_channels; + } + } + + 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 and try again.\n", dev_dir_name); + "/*_en or pass -a to autoenable channels and " + "try again.\n", dev_dir_name); ret = -ENOENT; goto error_free_triggername; } @@ -479,7 +568,12 @@ error_free_channels: error_free_triggername: if (datardytrigger) free(trigger_name); - +error_disable_channels: + if (autochannels == AUTOCHANNELS_ACTIVE) { + ret = enable_disable_all_channels(dev_dir_name, 0); + if (ret) + fprintf(stderr, "Failed to disable all channels\n"); + } error_free_dev_dir_name: free(dev_dir_name); diff --git a/tools/iio/iio_utils.h b/tools/iio/iio_utils.h index e3503bfe538b..780f2014f8fa 100644 --- a/tools/iio/iio_utils.h +++ b/tools/iio/iio_utils.h @@ -52,6 +52,13 @@ struct iio_channel_info { 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, |