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/**
* Copyright (C) ARM Limited 2013-2014. All rights reserved.
*
* 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 "HwmonDriver.h"
#include "libsensors/sensors.h"
#include "Logging.h"
// feature->type to input map
static sensors_subfeature_type getInput(const sensors_feature_type type) {
switch (type) {
case SENSORS_FEATURE_IN: return SENSORS_SUBFEATURE_IN_INPUT;
case SENSORS_FEATURE_FAN: return SENSORS_SUBFEATURE_FAN_INPUT;
case SENSORS_FEATURE_TEMP: return SENSORS_SUBFEATURE_TEMP_INPUT;
case SENSORS_FEATURE_POWER: return SENSORS_SUBFEATURE_POWER_INPUT;
case SENSORS_FEATURE_ENERGY: return SENSORS_SUBFEATURE_ENERGY_INPUT;
case SENSORS_FEATURE_CURR: return SENSORS_SUBFEATURE_CURR_INPUT;
case SENSORS_FEATURE_HUMIDITY: return SENSORS_SUBFEATURE_HUMIDITY_INPUT;
default:
logg->logError(__FILE__, __LINE__, "Unsupported hwmon feature %i", type);
handleException();
}
};
class HwmonCounter : public DriverCounter {
public:
HwmonCounter(DriverCounter *next, char *const name, const sensors_chip_name *chip, const sensors_feature *feature);
~HwmonCounter();
const char *getLabel() const { return label; }
const char *getTitle() const { return title; }
bool isDuplicate() const { return duplicate; }
const char *getDisplay() const { return display; }
const char *getCounterClass() const { return counter_class; }
const char *getUnit() const { return unit; }
int getModifier() const { return modifier; }
int64_t read();
private:
void init(const sensors_chip_name *chip, const sensors_feature *feature);
const sensors_chip_name *chip;
const sensors_feature *feature;
char *label;
const char *title;
const char *display;
const char *counter_class;
const char *unit;
double previous_value;
int modifier;
int monotonic: 1,
duplicate : 1;
// Intentionally unimplemented
HwmonCounter(const HwmonCounter &);
HwmonCounter &operator=(const HwmonCounter &);
};
HwmonCounter::HwmonCounter(DriverCounter *next, char *const name, const sensors_chip_name *chip, const sensors_feature *feature) : DriverCounter(next, name), chip(chip), feature(feature), duplicate(false) {
label = sensors_get_label(chip, feature);
switch (feature->type) {
case SENSORS_FEATURE_IN:
title = "Voltage";
display = "maximum";
counter_class = "absolute";
unit = "V";
modifier = 1000;
monotonic = false;
break;
case SENSORS_FEATURE_FAN:
title = "Fan";
display = "average";
counter_class = "absolute";
unit = "RPM";
modifier = 1;
monotonic = false;
break;
case SENSORS_FEATURE_TEMP:
title = "Temperature";
display = "maximum";
counter_class = "absolute";
unit = "°C";
modifier = 1000;
monotonic = false;
break;
case SENSORS_FEATURE_POWER:
title = "Power";
display = "maximum";
counter_class = "absolute";
unit = "W";
modifier = 1000000;
monotonic = false;
break;
case SENSORS_FEATURE_ENERGY:
title = "Energy";
display = "accumulate";
counter_class = "delta";
unit = "J";
modifier = 1000000;
monotonic = true;
break;
case SENSORS_FEATURE_CURR:
title = "Current";
display = "maximum";
counter_class = "absolute";
unit = "A";
modifier = 1000;
monotonic = false;
break;
case SENSORS_FEATURE_HUMIDITY:
title = "Humidity";
display = "average";
counter_class = "absolute";
unit = "%";
modifier = 1000;
monotonic = false;
break;
default:
logg->logError(__FILE__, __LINE__, "Unsupported hwmon feature %i", feature->type);
handleException();
}
for (HwmonCounter * counter = static_cast<HwmonCounter *>(next); counter != NULL; counter = static_cast<HwmonCounter *>(counter->getNext())) {
if (strcmp(label, counter->getLabel()) == 0 && strcmp(title, counter->getTitle()) == 0) {
duplicate = true;
counter->duplicate = true;
break;
}
}
}
HwmonCounter::~HwmonCounter() {
free((void *)label);
}
int64_t HwmonCounter::read() {
double value;
double result;
const sensors_subfeature *subfeature;
// Keep in sync with the read check in HwmonDriver::readEvents
subfeature = sensors_get_subfeature(chip, feature, getInput(feature->type));
if (!subfeature) {
logg->logError(__FILE__, __LINE__, "No input value for hwmon sensor %s", label);
handleException();
}
if (sensors_get_value(chip, subfeature->number, &value) != 0) {
logg->logError(__FILE__, __LINE__, "Can't get input value for hwmon sensor %s", label);
handleException();
}
result = (monotonic ? value - previous_value : value);
previous_value = value;
return result;
}
HwmonDriver::HwmonDriver() {
}
HwmonDriver::~HwmonDriver() {
sensors_cleanup();
}
void HwmonDriver::readEvents(mxml_node_t *const) {
int err = sensors_init(NULL);
if (err) {
logg->logMessage("Failed to initialize libsensors! (%d)", err);
return;
}
sensors_sysfs_no_scaling = 1;
int chip_nr = 0;
const sensors_chip_name *chip;
while ((chip = sensors_get_detected_chips(NULL, &chip_nr))) {
int feature_nr = 0;
const sensors_feature *feature;
while ((feature = sensors_get_features(chip, &feature_nr))) {
// Keep in sync with HwmonCounter::read
// Can this counter be read?
double value;
const sensors_subfeature *const subfeature = sensors_get_subfeature(chip, feature, getInput(feature->type));
if ((subfeature == NULL) || (sensors_get_value(chip, subfeature->number, &value) != 0)) {
continue;
}
// Get the name of the counter
int len = sensors_snprintf_chip_name(NULL, 0, chip) + 1;
char *chip_name = new char[len];
sensors_snprintf_chip_name(chip_name, len, chip);
len = snprintf(NULL, 0, "hwmon_%s_%d_%d", chip_name, chip_nr, feature->number) + 1;
char *const name = new char[len];
snprintf(name, len, "hwmon_%s_%d_%d", chip_name, chip_nr, feature->number);
delete [] chip_name;
setCounters(new HwmonCounter(getCounters(), name, chip, feature));
}
}
}
void HwmonDriver::writeEvents(mxml_node_t *root) const {
root = mxmlNewElement(root, "category");
mxmlElementSetAttr(root, "name", "hwmon");
char buf[1024];
for (HwmonCounter *counter = static_cast<HwmonCounter *>(getCounters()); counter != NULL; counter = static_cast<HwmonCounter *>(counter->getNext())) {
mxml_node_t *node = mxmlNewElement(root, "event");
mxmlElementSetAttr(node, "counter", counter->getName());
mxmlElementSetAttr(node, "title", counter->getTitle());
if (counter->isDuplicate()) {
mxmlElementSetAttrf(node, "name", "%s (0x%x)", counter->getLabel(), counter->getKey());
} else {
mxmlElementSetAttr(node, "name", counter->getLabel());
}
mxmlElementSetAttr(node, "display", counter->getDisplay());
mxmlElementSetAttr(node, "class", counter->getCounterClass());
mxmlElementSetAttr(node, "units", counter->getUnit());
if (counter->getModifier() != 1) {
mxmlElementSetAttrf(node, "modifier", "%d", counter->getModifier());
}
if (strcmp(counter->getDisplay(), "average") == 0 || strcmp(counter->getDisplay(), "maximum") == 0) {
mxmlElementSetAttr(node, "average_selection", "yes");
}
snprintf(buf, sizeof(buf), "libsensors %s sensor %s (%s)", counter->getTitle(), counter->getLabel(), counter->getName());
mxmlElementSetAttr(node, "description", buf);
}
}
void HwmonDriver::start() {
for (DriverCounter *counter = getCounters(); counter != NULL; counter = counter->getNext()) {
if (!counter->isEnabled()) {
continue;
}
counter->read();
}
}
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