1 files changed, 69 insertions, 0 deletions
diff --git a/lib/hidpp20.h b/lib/hidpp20.h
new file mode 100644
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--- /dev/null
+++ b/lib/hidpp20.h
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+/*
+ * HID++ 2.0 protocol details.
+ *
+ * Copyright (C) 2014 Peter Wu <peter@lekensteyn.nl>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef HIDPP_20_H
+#define HIDPP_20_H
+#include <stdint.h>
+#include "hidpp.h"
+
+typedef struct {
+	uint8_t     feature_index;
+	uint16_t    feature_id;
+	uint8_t     feature_type;
+} FeatureInfo;
+
+/**
+ * Retrieves the number of HID++ 2.0 features.
+ *
+ * @param fd        File descriptor of the hidraw device.
+ * @param count[out] The number of HID++ 2.0 features.
+ * @return Zero on success, a HID++ error code otherwise.
+ */
+int hidpp20_get_features_count(int fd, uint8_t *count);
+
+/**
+ * Retrieves feature information from a feature index.
+ *
+ * @param fd        File descriptor of the hidraw device.
+ * @param feature_index A feature index to find information for.
+ * @param fi[out]   Feature information on success.
+ * @return Zero on success, a HID++ error code otherwise.
+ */
+int hidpp20_get_feature(int fd, uint8_t feature_index, FeatureInfo *fi);
+
+/**
+ * Retrieves the feature index for a given feature ID.
+ *
+ * @param fd        File descriptor of the hidraw device.
+ * @param feature_id A 16-bit feature identifier.
+ * @param fi[out]   Feature information on success.
+ * @return Zero on success, a HID++ error code otherwise.
+ */
+int hidpp20_get_feature_by_id(int fd, uint16_t feature_id, FeatureInfo *fi);
+
+/**
+ * Retrieves the HID++ version for the device.
+ *
+ * @param fd        File descriptor of the hidraw device.
+ * @param device_index Device index (between 1 and 6).
+ * @return a non-zero number indicating the HID++ version or 0 if the version
+ * could not be determined.
+ */
+uint16_t hidpp20_get_version(int fd, uint8_t device_index);
+#endif