1 files changed, 245 insertions, 0 deletions
diff --git a/tools/gator/daemon/HwmonDriver.cpp b/tools/gator/daemon/HwmonDriver.cpp
new file mode 100644
index 000000000000..9d161ae5ac56
--- /dev/null
+++ b/tools/gator/daemon/HwmonDriver.cpp
@@ -0,0 +1,245 @@
+/**
+ * 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();
+	}
+}