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dey-examples: add tamper_sample application for ccimx6ul 

https://jira.digi.com/browse/DEL-3195

Signed-off-by: Pedro Perez de Heredia <pedro.perez@digi.com>
Signed-off-by: Javier Viguera <javier.viguera@digi.com>
This commit is contained in:
Pedro Perez de Heredia 2016-11-18 11:23:36 +01:00 committed by Javier Viguera
parent 26905d8cfb
commit f57007a322
6 changed files with 980 additions and 0 deletions
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13
meta-digi-dey/recipes-digi/dey-examples/dey-examples-tamper.bb Normal file
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SUMMARY = "DEY examples: Tamper test application"
SECTION = "examples"
LICENSE = "GPL-2.0"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6"
SRC_URI = "file://tamper_sample"
S = "${WORKDIR}/tamper_sample"
do_install() {
install -d ${D}${bindir}
install -m 0755 tamper_sample ${D}${bindir}
}

11
meta-digi-dey/recipes-digi/dey-examples/files/tamper_sample/Makefile Normal file
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CFLAGS = -Wall -g -D_GNU_SOURCE
all: tamper_sample
tamper_sample: tamper_sample.o iio_utils.o
%.o: %.c iio_utils.h
.PHONY: clean
clean:
rm -f *.o tamper_sample

669
meta-digi-dey/recipes-digi/dey-examples/files/tamper_sample/iio_utils.c Normal file
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/* IIO - useful set of util functionality
*
* Copyright (c) 2008 Jonathan Cameron
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/
#ifndef _IIO_UTILS_H
#define _IIO_UTILS_H
#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
**/
int iioutils_break_up_name(const char *full_name,
char **generic_name)
{
char *current;
char *w, *r;
char *working, *prefix = "";
int i;
for (i = 0; i < sizeof(iio_direction) / sizeof(iio_direction[0]); i++)
if (!strncmp(full_name, iio_direction[i],
strlen(iio_direction[i]))) {
prefix = iio_direction[i];
break;
}
current = strdup(full_name + strlen(prefix) + 1);
working = strtok(current, "_\0");
w = working;
r = working;
while (*r != '\0') {
if (!isdigit(*r)) {
*w = *r;
w++;
}
r++;
}
*w = '\0';
asprintf(generic_name, "%s_%s", prefix, working);
free(current);
return 0;
}
/**
* iioutils_get_type() - find and process _type attribute data
* @is_signed: output whether channel is signed
* @bytes: output how many bytes the channel storage occupies
* @mask: output a bit mask for the raw data
* @be: big endian
* @device_dir: the iio device directory
* @name: the channel name
* @generic_name: the channel type name
**/
int iioutils_get_type(unsigned *is_signed,
unsigned *bytes,
unsigned *bits_used,
unsigned *shift,
uint64_t *mask,
unsigned *be,
const char *device_dir,
const char *name,
const char *generic_name)
{
FILE *sysfsfp;
int ret;
DIR *dp;
char *scan_el_dir, *builtname, *builtname_generic, *filename = 0;
char signchar, endianchar;
unsigned padint;
const struct dirent *ent;
ret = asprintf(&scan_el_dir, FORMAT_SCAN_ELEMENTS_DIR, device_dir);
if (ret < 0) {
ret = -ENOMEM;
goto error_ret;
}
ret = asprintf(&builtname, FORMAT_TYPE_FILE, name);
if (ret < 0) {
ret = -ENOMEM;
goto error_free_scan_el_dir;
}
ret = asprintf(&builtname_generic, FORMAT_TYPE_FILE, generic_name);
if (ret < 0) {
ret = -ENOMEM;
goto error_free_builtname;
}
dp = opendir(scan_el_dir);
if (dp == NULL) {
ret = -errno;
goto error_free_builtname_generic;
}
while (ent = readdir(dp), ent != NULL)
/*
* Do we allow devices to override a generic name with
* a specific one?
*/
if ((strcmp(builtname, ent->d_name) == 0) ||
(strcmp(builtname_generic, ent->d_name) == 0)) {
ret = asprintf(&filename,
"%s/%s", scan_el_dir, ent->d_name);
if (ret < 0) {
ret = -ENOMEM;
goto error_closedir;
}
sysfsfp = fopen(filename, "r");
if (sysfsfp == NULL) {
printf("failed to open %s\n", filename);
ret = -errno;
goto error_free_filename;
}
ret = fscanf(sysfsfp,
"%ce:%c%u/%u>>%u",
&endianchar,
&signchar,
bits_used,
&padint, shift);
if (ret < 0) {
printf("failed to pass scan type description\n");
ret = -errno;
goto error_close_sysfsfp;
}
*be = (endianchar == 'b');
*bytes = padint / 8;
if (*bits_used == 64)
*mask = ~0;
else
*mask = (1 << *bits_used) - 1;
if (signchar == 's')
*is_signed = 1;
else
*is_signed = 0;
fclose(sysfsfp);
free(filename);
filename = 0;
sysfsfp = 0;
}
error_close_sysfsfp:
if (sysfsfp)
fclose(sysfsfp);
error_free_filename:
if (filename)
free(filename);
error_closedir:
closedir(dp);
error_free_builtname_generic:
free(builtname_generic);
error_free_builtname:
free(builtname);
error_free_scan_el_dir:
free(scan_el_dir);
error_ret:
return ret;
}
int iioutils_get_param_float(float *output,
const char *param_name,
const char *device_dir,
const char *name,
const char *generic_name)
{
FILE *sysfsfp;
int ret;
DIR *dp;
char *builtname, *builtname_generic;
char *filename = NULL;
const struct dirent *ent;
ret = asprintf(&builtname, "%s_%s", name, param_name);
if (ret < 0) {
ret = -ENOMEM;
goto error_ret;
}
ret = asprintf(&builtname_generic,
"%s_%s", generic_name, param_name);
if (ret < 0) {
ret = -ENOMEM;
goto error_free_builtname;
}
dp = opendir(device_dir);
if (dp == NULL) {
ret = -errno;
goto error_free_builtname_generic;
}
while (ent = readdir(dp), ent != NULL)
if ((strcmp(builtname, ent->d_name) == 0) ||
(strcmp(builtname_generic, ent->d_name) == 0)) {
ret = asprintf(&filename,
"%s/%s", device_dir, ent->d_name);
if (ret < 0) {
ret = -ENOMEM;
goto error_closedir;
}
sysfsfp = fopen(filename, "r");
if (!sysfsfp) {
ret = -errno;
goto error_free_filename;
}
fscanf(sysfsfp, "%f", output);
break;
}
error_free_filename:
if (filename)
free(filename);
error_closedir:
closedir(dp);
error_free_builtname_generic:
free(builtname_generic);
error_free_builtname:
free(builtname);
error_ret:
return ret;
}
/**
* bsort_channel_array_by_index() - reorder so that the array is in index order
*
**/
void bsort_channel_array_by_index(struct iio_channel_info **ci_array,
int cnt)
{
struct iio_channel_info temp;
int x, y;
for (x = 0; x < cnt; x++)
for (y = 0; y < (cnt - 1); y++)
if ((*ci_array)[y].index > (*ci_array)[y+1].index) {
temp = (*ci_array)[y + 1];
(*ci_array)[y + 1] = (*ci_array)[y];
(*ci_array)[y] = temp;
}
}
/**
* build_channel_array() - function to figure out what channels are present
* @device_dir: the IIO device directory in sysfs
* @
**/
int build_channel_array(const char *device_dir,
struct iio_channel_info **ci_array,
int *counter)
{
DIR *dp;
FILE *sysfsfp;
int count, i;
struct iio_channel_info *current;
int ret;
const struct dirent *ent;
char *scan_el_dir;
char *filename;
*counter = 0;
ret = asprintf(&scan_el_dir, FORMAT_SCAN_ELEMENTS_DIR, device_dir);
if (ret < 0) {
ret = -ENOMEM;
goto error_ret;
}
dp = opendir(scan_el_dir);
if (dp == NULL) {
ret = -errno;
goto error_free_name;
}
while (ent = readdir(dp), ent != NULL)
if (strcmp(ent->d_name + strlen(ent->d_name) - strlen("_en"),
"_en") == 0) {
ret = asprintf(&filename,
"%s/%s", scan_el_dir, ent->d_name);
if (ret < 0) {
ret = -ENOMEM;
goto error_close_dir;
}
sysfsfp = fopen(filename, "r");
if (sysfsfp == NULL) {
ret = -errno;
free(filename);
goto error_close_dir;
}
fscanf(sysfsfp, "%i", &ret);
if (ret == 1)
(*counter)++;
fclose(sysfsfp);
free(filename);
}
*ci_array = malloc(sizeof(**ci_array) * (*counter));
if (*ci_array == NULL) {
ret = -ENOMEM;
goto error_close_dir;
}
seekdir(dp, 0);
count = 0;
while (ent = readdir(dp), ent != NULL) {
if (strcmp(ent->d_name + strlen(ent->d_name) - strlen("_en"),
"_en") == 0) {
int current_enabled = 0;
current = &(*ci_array)[count++];
ret = asprintf(&filename,
"%s/%s", scan_el_dir, ent->d_name);
if (ret < 0) {
ret = -ENOMEM;
/* decrement count to avoid freeing name */
count--;
goto error_cleanup_array;
}
sysfsfp = fopen(filename, "r");
if (sysfsfp == NULL) {
free(filename);
ret = -errno;
goto error_cleanup_array;
}
fscanf(sysfsfp, "%i", &current_enabled);
fclose(sysfsfp);
if (!current_enabled) {
free(filename);
count--;
continue;
}
current->scale = 1.0;
current->offset = 0;
current->name = strndup(ent->d_name,
strlen(ent->d_name) -
strlen("_en"));
if (current->name == NULL) {
free(filename);
ret = -ENOMEM;
goto error_cleanup_array;
}
/* Get the generic and specific name elements */
ret = iioutils_break_up_name(current->name,
&current->generic_name);
if (ret) {
free(filename);
goto error_cleanup_array;
}
ret = asprintf(&filename,
"%s/%s_index",
scan_el_dir,
current->name);
if (ret < 0) {
free(filename);
ret = -ENOMEM;
goto error_cleanup_array;
}
sysfsfp = fopen(filename, "r");
fscanf(sysfsfp, "%u", &current->index);
fclose(sysfsfp);
free(filename);
/* Find the scale */
ret = iioutils_get_param_float(&current->scale,
"scale",
device_dir,
current->name,
current->generic_name);
if (ret < 0)
goto error_cleanup_array;
ret = iioutils_get_param_float(&current->offset,
"offset",
device_dir,
current->name,
current->generic_name);
if (ret < 0)
goto error_cleanup_array;
ret = iioutils_get_type(&current->is_signed,
&current->bytes,
&current->bits_used,
&current->shift,
&current->mask,
&current->be,
device_dir,
current->name,
current->generic_name);
}
}
closedir(dp);
/* reorder so that the array is in index order */
bsort_channel_array_by_index(ci_array, *counter);
return 0;
error_cleanup_array:
for (i = count - 1; i >= 0; i--)
free((*ci_array)[i].name);
free(*ci_array);
error_close_dir:
closedir(dp);
error_free_name:
free(scan_el_dir);
error_ret:
return ret;
}
/**
* find_type_by_name() - function to match top level types by name
* @name: top level type instance name
* @type: the type of top level instance being sort
*
* Typical types this is used for are device and trigger.
**/
int find_type_by_name(const char *name, const char *type)
{
const struct dirent *ent;
int number, numstrlen;
FILE *nameFile;
DIR *dp;
char thisname[IIO_MAX_NAME_LENGTH];
char *filename;
dp = opendir(iio_dir);
if (dp == NULL) {
printf("No industrialio devices available\n");
return -ENODEV;
}
while (ent = readdir(dp), ent != NULL) {
if (strcmp(ent->d_name, ".") != 0 &&
strcmp(ent->d_name, "..") != 0 &&
strlen(ent->d_name) > strlen(type) &&
strncmp(ent->d_name, type, strlen(type)) == 0) {
numstrlen = sscanf(ent->d_name + strlen(type),
"%d",
&number);
/* verify the next character is not a colon */
if (strncmp(ent->d_name + strlen(type) + numstrlen,
":",
1) != 0) {
filename = malloc(strlen(iio_dir)
+ strlen(type)
+ numstrlen
+ 6);
if (filename == NULL) {
closedir(dp);
return -ENOMEM;
}
sprintf(filename, "%s%s%d/name",
iio_dir,
type,
number);
nameFile = fopen(filename, "r");
if (!nameFile) {
free(filename);
continue;
}
free(filename);
fscanf(nameFile, "%s", thisname);
fclose(nameFile);
if (strcmp(name, thisname) == 0) {
closedir(dp);
return number;
}
}
}
}
closedir(dp);
return -ENODEV;
}
int _write_sysfs_int(char *filename, char *basedir, int val, int verify)
{
int ret = 0;
FILE *sysfsfp;
int test;
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (temp == NULL)
return -ENOMEM;
sprintf(temp, "%s/%s", basedir, filename);
sysfsfp = fopen(temp, "w");
if (sysfsfp == NULL) {
printf("failed to open %s\n", temp);
ret = -errno;
goto error_free;
}
fprintf(sysfsfp, "%d", val);
fclose(sysfsfp);
if (verify) {
sysfsfp = fopen(temp, "r");
if (sysfsfp == NULL) {
printf("failed to open %s\n", temp);
ret = -errno;
goto error_free;
}
fscanf(sysfsfp, "%d", &test);
fclose(sysfsfp);
if (test != val) {
printf("Possible failure in int write %d to %s%s\n",
val,
basedir,
filename);
ret = -1;
}
}
error_free:
free(temp);
return ret;
}
int write_sysfs_int(char *filename, char *basedir, int val)
{
return _write_sysfs_int(filename, basedir, val, 0);
}
int write_sysfs_int_and_verify(char *filename, char *basedir, int val)
{
return _write_sysfs_int(filename, basedir, val, 1);
}
int _write_sysfs_string(char *filename, char *basedir, char *val, int verify)
{
int ret = 0;
FILE *sysfsfp;
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (temp == NULL) {
printf("Memory allocation failed\n");
return -ENOMEM;
}
sprintf(temp, "%s/%s", basedir, filename);
sysfsfp = fopen(temp, "w");
if (sysfsfp == NULL) {
printf("Could not open %s\n", temp);
ret = -errno;
goto error_free;
}
fprintf(sysfsfp, "%s", val);
fclose(sysfsfp);
if (verify) {
sysfsfp = fopen(temp, "r");
if (sysfsfp == NULL) {
printf("could not open file to verify\n");
ret = -errno;
goto error_free;
}
fscanf(sysfsfp, "%s", temp);
fclose(sysfsfp);
if (strcmp(temp, val) != 0) {
printf("Possible failure in string write of %s "
"Should be %s "
"written to %s\%s\n",
temp,
val,
basedir,
filename);
ret = -1;
}
}
error_free:
free(temp);
return ret;
}
/**
* write_sysfs_string_and_verify() - string write, readback and verify
* @filename: name of file to write to
* @basedir: the sysfs directory in which the file is to be found
* @val: the string to write
**/
int write_sysfs_string_and_verify(char *filename, char *basedir, char *val)
{
return _write_sysfs_string(filename, basedir, val, 1);
}
int write_sysfs_string(char *filename, char *basedir, char *val)
{
return _write_sysfs_string(filename, basedir, val, 0);
}
int read_sysfs_posint(char *filename, char *basedir)
{
int ret;
FILE *sysfsfp;
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (temp == NULL) {
printf("Memory allocation failed");
return -ENOMEM;
}
sprintf(temp, "%s/%s", basedir, filename);
sysfsfp = fopen(temp, "r");
if (sysfsfp == NULL) {
ret = -errno;
goto error_free;
}
fscanf(sysfsfp, "%d\n", &ret);
fclose(sysfsfp);
error_free:
free(temp);
return ret;
}
int read_sysfs_float(char *filename, char *basedir, float *val)
{
int ret = 0;
FILE *sysfsfp;
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (temp == NULL) {
printf("Memory allocation failed");
return -ENOMEM;
}
sprintf(temp, "%s/%s", basedir, filename);
sysfsfp = fopen(temp, "r");
if (sysfsfp == NULL) {
ret = -errno;
goto error_free;
}
fscanf(sysfsfp, "%f\n", val);
fclose(sysfsfp);
error_free:
free(temp);
return ret;
}
int read_sysfs_string(const char *filename, const char *basedir, char *str)
{
int ret = 0;
FILE *sysfsfp;
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (temp == NULL) {
printf("Memory allocation failed");
return -ENOMEM;
}
sprintf(temp, "%s/%s", basedir, filename);
sysfsfp = fopen(temp, "r");
if (sysfsfp == NULL) {
ret = -errno;
goto error_free;
}
fscanf(sysfsfp, "%s\n", str);
fclose(sysfsfp);
error_free:
free(temp);
return ret;
}
#endif /* _IIO_UTILS_H */

71
meta-digi-dey/recipes-digi/dey-examples/files/tamper_sample/iio_utils.h Normal file
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#ifndef _IIO_UTILS_H_
#define _IIO_UTILS_H_
/* IIO - useful set of util functionality
*
* Copyright (c) 2008 Jonathan Cameron
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/
#include <stdint.h>
/* Made up value to limit allocation sizes */
#define IIO_MAX_NAME_LENGTH 30
#define FORMAT_SCAN_ELEMENTS_DIR "%s/scan_elements"
#define FORMAT_TYPE_FILE "%s_type"
extern const char *iio_dir;
/**
* struct iio_channel_info - information about a given channel
* @name: channel name
* @generic_name: general name for channel type
* @scale: scale factor to be applied for conversion to si units
* @offset: offset to be applied for conversion to si units
* @index: the channel index in the buffer output
* @bytes: number of bytes occupied in buffer output
* @mask: a bit mask for the raw output
* @is_signed: is the raw value stored signed
* @enabled: is this channel enabled
**/
struct iio_channel_info {
char *name;
char *generic_name;
float scale;
float offset;
unsigned index;
unsigned bytes;
unsigned bits_used;
unsigned shift;
uint64_t mask;
unsigned be;
unsigned is_signed;
unsigned location;
};
int iioutils_break_up_name(const char *full_name, char **generic_name);
int iioutils_get_type(unsigned *is_signed, unsigned *bytes,
unsigned *bits_used, unsigned *shift,
uint64_t *mask, unsigned *be,
const char *device_dir, const char *name,
const char *generic_name);
int iioutils_get_param_float(float *output, const char *param_name,
const char *device_dir, const char *name,
const char *generic_name);
void bsort_channel_array_by_index(struct iio_channel_info **ci_array, int cnt);
int build_channel_array(const char *device_dir,
struct iio_channel_info **ci_array, int *counter);
int find_type_by_name(const char *name, const char *type);
int write_sysfs_int(char *filename, char *basedir, int val);
int write_sysfs_int_and_verify(char *filename, char *basedir, int val);
int write_sysfs_string_and_verify(char *filename, char *basedir, char *val);
int write_sysfs_string(char *filename, char *basedir, char *val);
int read_sysfs_posint(char *filename, char *basedir);
int read_sysfs_float(char *filename, char *basedir, float *val);
int read_sysfs_string(const char *filename, const char *basedir, char *str);
#endif /* _IIO_UTILS_H_ */

215
meta-digi-dey/recipes-digi/dey-examples/files/tamper_sample/tamper_sample.c Normal file
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/*
* ConnectCore 6UL tamper sample application.
*
* Copyright (c) 2016 Digi International Inc.
* All rights reserved.
*
* Based on iio_event_monitor.c from the tools/iio directory, of the linux
* kernel.
*
* 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 <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <linux/iio/events.h>
#include <linux/iio/types.h>
#include <sys/ioctl.h>
#include "iio_utils.h"
#define TAMPER_SAMPLE_USAGE \
"Usage:\n" \
"tamper_sample -i tamper_iface\n\n"
#define TAMPER_SAMPLE_FULL_USAGE \
"Usage:\n" \
"tamper_sample [options]\n\n" \
"Options:\n" \
" -i : tamper interface to be used\n" \
" -h : help\n\n"
typedef struct mca_tamper {
struct iio_event_data event;
char *dev_name;
char *chrdev_name;
int iface;
int dev_num;
int event_fd;
} mca_tamper_t;
mca_tamper_t tamper_data;
static void show_usage(int full)
{
fprintf(stdout, "%s", full ?
TAMPER_SAMPLE_FULL_USAGE : TAMPER_SAMPLE_USAGE);
}
static bool event_is_tamper(struct iio_event_data *event)
{
enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(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);
bool ret = true;
if (type != IIO_ACTIVITY)
ret = false;
else if (ev_type != IIO_EV_TYPE_CHANGE)
ret = false;
else if (dir != IIO_EV_DIR_NONE)
ret = false;
return ret;
}
static void tamper_event_log(mca_tamper_t *tdata)
{
/* Log the event in the system log, if any */
fprintf(stdout, "tamper%d event! time: %lld\n",
tdata->iface, tdata->event.timestamp);
}
static void tamper_event_actions(mca_tamper_t *tdata)
{
/* Take the necessary defensive actions after a tamper event */
fprintf(stdout, "tamper%d: taking actions!\n", tdata->iface);
}
static void tamper_event_ack(mca_tamper_t *tdata)
{
int ret;
char *tamper_sysfs_dir;
ret = asprintf(&tamper_sysfs_dir,
"/sys/bus/iio/devices/iio:device%d",
tdata->dev_num);
if (ret < 0) {
fprintf(stdout, "Failed to build event ack file name\n");
return;
}
/* Finally, acknowledge the event */
ret = write_sysfs_int("tamper_events", tamper_sysfs_dir, 2);
if (ret < 0) {
fprintf(stdout, "Failed to acknowledge tamper%d event\n",
tdata->iface);
}
}
static void process_tamper_event(mca_tamper_t *tdata)
{
if (!event_is_tamper(&tdata->event)) {
fprintf(stdout, "Unknown event: time: %lld, id: %llx\n",
tdata->event.timestamp, tdata->event.id);
return;
}
tamper_event_log(tdata);
tamper_event_actions(tdata);
tamper_event_ack(tdata);
}
int main(int argc, char **argv)
{
mca_tamper_t *tdata = &tamper_data;
int ret;
int opt;
int fd;
memset(tdata, 0, sizeof(mca_tamper_t));
if (argc <= 1) {
show_usage(0);
return EXIT_FAILURE;
}
while ((opt = getopt(argc, argv, "i:h")) > 0) {
switch (opt) {
case 'i':
tdata->iface = atoi(optarg);
break;
case 'h':
show_usage(1);
return EXIT_SUCCESS;
default:
show_usage(0);
return EXIT_FAILURE;
}
}
ret = asprintf(&tdata->dev_name, "TAMPER%d", tdata->iface);
if (ret < 0) {
fprintf(stdout, "Failed to find interface, device name too long?\n");
ret = -ENOMEM;
goto error_ret;
}
tdata->dev_num = find_type_by_name(tdata->dev_name, "iio:device");
if (tdata->dev_num < 0) {
fprintf(stdout, "Failed to find iio:device for TAMPER%d\n",
tdata->iface);
ret = -ENODEV;
goto error_ret2;
}
ret = asprintf(&tdata->chrdev_name, "/dev/iio:device%d", tdata->dev_num);
if (ret < 0) {
fprintf(stdout, "Failed to allocate memory\n");
ret = -ENOMEM;
goto error_ret2;
}
fd = open(tdata->chrdev_name, 0);
if (fd < 0) {
fprintf(stdout, "Failed to open %s\n", tdata->chrdev_name);
ret = -errno;
goto error_ret3;
}
ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &tdata->event_fd);
close(fd);
if (ret < 0 || tdata->event_fd < 0) {
fprintf(stdout, "Failed to retrieve event fd\n");
ret = -errno;
goto error_ret3;
}
fprintf(stdout, "Waiting for tamper events:\n");
while (true) {
ret = read(tdata->event_fd, &tdata->event, sizeof(struct iio_event_data));
if (ret < 0) {
if (errno == EAGAIN) {
fprintf(stdout, "No events... continue\n");
continue;
} else {
perror("Failed to read event from device");
ret = -errno;
break;
}
}
process_tamper_event(tdata);
}
close(tdata->event_fd);
error_ret3:
free(tdata->chrdev_name);
error_ret2:
free(tdata->dev_name);
error_ret:
return ret;
}

1
meta-digi-dey/recipes-digi/packagegroups/packagegroup-dey-examples.bb
View File

@ -40,6 +40,7 @@ RDEPENDS_${PN}_append_ccimx6ul = "\
${@bb.utils.contains("MACHINE_FEATURES", "bluetooth", "dey-examples-btconfig", "", d)} \ ${@bb.utils.contains("MACHINE_FEATURES", "bluetooth", "dey-examples-btconfig", "", d)} \
dey-examples-can \ dey-examples-can \
${@bb.utils.contains("MACHINE_FEATURES", "bluetooth", "dey-examples-hdp", "", d)} \ ${@bb.utils.contains("MACHINE_FEATURES", "bluetooth", "dey-examples-hdp", "", d)} \
dey-examples-tamper \
" "
COMPATIBLE_MACHINE = "(ccardimx28|ccimx6$|ccimx6ul)" COMPATIBLE_MACHINE = "(ccardimx28|ccimx6$|ccimx6ul)"