auto import from //depot/cupcake/@135843
diff --git a/include/hardware/sensors.h b/include/hardware/sensors.h
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--- /dev/null
+++ b/include/hardware/sensors.h
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+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_SENSORS_INTERFACE_H
+#define ANDROID_SENSORS_INTERFACE_H
+
+#include <stdint.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#include <hardware/hardware.h>
+
+__BEGIN_DECLS
+
+/**
+ * The id of this module
+ */
+#define SENSORS_HARDWARE_MODULE_ID "sensors"
+
+/**
+ * Name of the sensors device to open
+ */
+#define SENSORS_HARDWARE_CONTROL "control"
+#define SENSORS_HARDWARE_DATA "data"
+
+/**
+ * Handles must be higher than SENSORS_HANDLE_BASE and must be unique.
+ * A Handle identifies a given sensors. The handle is used to activate
+ * and/or deactivate sensors.
+ * In this version of the API there can only be 256 handles.
+ */
+#define SENSORS_HANDLE_BASE 0
+#define SENSORS_HANDLE_BITS 8
+#define SENSORS_HANDLE_COUNT (1<<SENSORS_HANDLE_BITS)
+
+
+/**
+ * Sensor types
+ */
+#define SENSOR_TYPE_ACCELEROMETER 1
+#define SENSOR_TYPE_MAGNETIC_FIELD 2
+#define SENSOR_TYPE_ORIENTATION 3
+#define SENSOR_TYPE_GYROSCOPE 4
+#define SENSOR_TYPE_LIGHT 5
+#define SENSOR_TYPE_PRESSURE 6
+#define SENSOR_TYPE_TEMPERATURE 7
+#define SENSOR_TYPE_PROXIMITY 8
+
+/**
+ * Values returned by the accelerometer in various locations in the universe.
+ * all values are in SI units (m/s^2)
+ */
+
+#define GRAVITY_SUN (275.0f)
+#define GRAVITY_MERCURY (3.70f)
+#define GRAVITY_VENUS (8.87f)
+#define GRAVITY_EARTH (9.80665f)
+#define GRAVITY_MOON (1.6f)
+#define GRAVITY_MARS (3.71f)
+#define GRAVITY_JUPITER (23.12f)
+#define GRAVITY_SATURN (8.96f)
+#define GRAVITY_URANUS (8.69f)
+#define GRAVITY_NEPTUNE (11.0f)
+#define GRAVITY_PLUTO (0.6f)
+#define GRAVITY_DEATH_STAR_I (0.000000353036145f)
+#define GRAVITY_THE_ISLAND (4.815162342f)
+
+/** Maximum magnetic field on Earth's surface */
+#define MAGNETIC_FIELD_EARTH_MAX (60.0f)
+
+/** Minimum magnetic field on Earth's surface */
+#define MAGNETIC_FIELD_EARTH_MIN (30.0f)
+
+
+/**
+ * status of each sensor
+ */
+
+#define SENSOR_STATUS_UNRELIABLE 0
+#define SENSOR_STATUS_ACCURACY_LOW 1
+#define SENSOR_STATUS_ACCURACY_MEDIUM 2
+#define SENSOR_STATUS_ACCURACY_HIGH 3
+
+/**
+ * Definition of the axis
+ * ----------------------
+ *
+ * This API is relative to the screen of the device in its default orientation,
+ * that is, if the device can be used in portrait or landscape, this API
+ * is only relative to the NATURAL orientation of the screen. In other words,
+ * the axis are not swapped when the device's screen orientation changes.
+ * Higher level services /may/ perform this transformation.
+ *
+ * x<0 x>0
+ * ^
+ * |
+ * +-----------+--> y>0
+ * | |
+ * | |
+ * | |
+ * | | / z<0
+ * | | /
+ * | | /
+ * O-----------+/
+ * |[] [ ] []/
+ * +----------/+ y<0
+ * /
+ * /
+ * |/ z>0 (toward the sky)
+ *
+ * O: Origin (x=0,y=0,z=0)
+ *
+ *
+ * Orientation
+ * -----------
+ *
+ * All values are angles in degrees.
+ *
+ * azimuth: angle between the magnetic north direction and the Y axis, around
+ * the Z axis (0<=azimuth<360).
+ * 0=North, 90=East, 180=South, 270=West
+ *
+ * pitch: Rotation around X axis (-180<=pitch<=180), with positive values when
+ * the z-axis moves toward the y-axis.
+ *
+ * roll: Rotation around Y axis (-90<=roll<=90), with positive values when
+ * the z-axis moves AWAY from the x-axis.
+ *
+ * Note: This definition is different from yaw, pitch and roll used in aviation
+ * where the X axis is along the long side of the plane (tail to nose).
+ *
+ *
+ * Acceleration
+ * ------------
+ *
+ * All values are in SI units (m/s^2) and measure the acceleration of the
+ * device minus the force of gravity.
+ *
+ * x: Acceleration minus Gx on the x-axis
+ * y: Acceleration minus Gy on the y-axis
+ * z: Acceleration minus Gz on the z-axis
+ *
+ * Examples:
+ * When the device lies flat on a table and is pushed on its left side
+ * toward the right, the x acceleration value is positive.
+ *
+ * When the device lies flat on a table, the acceleration value is +9.81,
+ * which correspond to the acceleration of the device (0 m/s^2) minus the
+ * force of gravity (-9.81 m/s^2).
+ *
+ * When the device lies flat on a table and is pushed toward the sky, the
+ * acceleration value is greater than +9.81, which correspond to the
+ * acceleration of the device (+A m/s^2) minus the force of
+ * gravity (-9.81 m/s^2).
+ *
+ *
+ * Magnetic Field
+ * --------------
+ *
+ * All values are in micro-Tesla (uT) and measure the ambient magnetic
+ * field in the X, Y and Z axis.
+ *
+ */
+typedef struct {
+ union {
+ float v[3];
+ struct {
+ float x;
+ float y;
+ float z;
+ };
+ struct {
+ float azimuth;
+ float pitch;
+ float roll;
+ };
+ };
+ int8_t status;
+ uint8_t reserved[3];
+} sensors_vec_t;
+
+/**
+ * Union of the various types of sensor data
+ * that can be returned.
+ */
+typedef struct {
+ /* sensor identifier */
+ int sensor;
+
+ union {
+ /* x,y,z values of the given sensor */
+ sensors_vec_t vector;
+
+ /* orientation values are in degrees */
+ sensors_vec_t orientation;
+
+ /* acceleration values are in meter per second per second (m/s^2) */
+ sensors_vec_t acceleration;
+
+ /* magnetic vector values are in micro-Tesla (uT) */
+ sensors_vec_t magnetic;
+
+ /* temperature is in degrees centigrade (Celsius) */
+ float temperature;
+ };
+
+ /* time is in nanosecond */
+ int64_t time;
+
+ uint32_t reserved;
+} sensors_data_t;
+
+
+struct sensor_t;
+
+/**
+ * Every hardware module must have a data structure named HAL_MODULE_INFO_SYM
+ * and the fields of this data structure must begin with hw_module_t
+ * followed by module specific information.
+ */
+struct sensors_module_t {
+ struct hw_module_t common;
+
+ /**
+ * Enumerate all available sensors. The list is returned in "list".
+ * @return number of sensors in the list
+ */
+ int (*get_sensors_list)(struct sensors_module_t* module,
+ struct sensor_t const** list);
+};
+
+struct sensor_t {
+ /* name of this sensors */
+ const char* name;
+ /* vendor of the hardware part */
+ const char* vendor;
+ /* version of the hardware part + driver. The value of this field is
+ * left to the implementation and doesn't have to be monotonicaly
+ * increasing.
+ */
+ int version;
+ /* handle that identifies this sensors. This handle is used to activate
+ * and deactivate this sensor. The value of the handle must be 8 bits
+ * in this version of the API.
+ */
+ int handle;
+ /* this sensor's type. */
+ int type;
+ /* maximaum range of this sensor's value in SI units */
+ float maxRange;
+ /* smallest difference between two values reported by this sensor */
+ float resolution;
+ /* rough estimate of this sensor's power consumption in mA */
+ float power;
+ /* reserved fields, must be zero */
+ void* reserved[9];
+};
+
+
+/**
+ * Every device data structure must begin with hw_device_t
+ * followed by module specific public methods and attributes.
+ */
+struct sensors_control_device_t {
+ struct hw_device_t common;
+
+ /**
+ * Returns the fd which will be the parameter to
+ * sensors_data_device_t::open_data().
+ * The caller takes ownership of this fd. This is intended to be
+ * passed cross processes.
+ *
+ * @return a fd if successful, < 0 on error
+ */
+ int (*open_data_source)(struct sensors_control_device_t *dev);
+
+ /** Activate/deactivate one sensor.
+ *
+ * @param handle is the handle of the sensor to change.
+ * @param enabled set to 1 to enable, or 0 to disable the sensor.
+ *
+ * @return 0 on success, negative errno code otherwise
+ */
+ int (*activate)(struct sensors_control_device_t *dev,
+ int handle, int enabled);
+
+ /**
+ * Set the delay between sensor events in ms
+ *
+ * @return 0 if successful, < 0 on error
+ */
+ int (*set_delay)(struct sensors_control_device_t *dev, int32_t ms);
+
+ /**
+ * Causes sensors_data_device_t.poll() to return -EWOULDBLOCK immediately.
+ */
+ int (*wake)(struct sensors_control_device_t *dev);
+};
+
+struct sensors_data_device_t {
+ struct hw_device_t common;
+
+ /**
+ * Prepare to read sensor data.
+ *
+ * This routine does NOT take ownership of the fd
+ * and must not close it. Typically this routine would
+ * use a duplicate of the fd parameter.
+ *
+ * @param fd from sensors_control_open.
+ *
+ * @return 0 if successful, < 0 on error
+ */
+ int (*data_open)(struct sensors_data_device_t *dev, int fd);
+
+ /**
+ * Caller has completed using the sensor data.
+ * The caller will not be blocked in sensors_data_poll
+ * when this routine is called.
+ *
+ * @return 0 if successful, < 0 on error
+ */
+ int (*data_close)(struct sensors_data_device_t *dev);
+
+ /**
+ * Return sensor data for one of the enabled sensors.
+ *
+ * @return sensor handle for the returned data, 0x7FFFFFFF when
+ * sensors_control_device_t.wake() is called and -errno on error
+ *
+ */
+ int (*poll)(struct sensors_data_device_t *dev,
+ sensors_data_t* data);
+};
+
+
+/** convenience API for opening and closing a device */
+
+static inline int sensors_control_open(const struct hw_module_t* module,
+ struct sensors_control_device_t** device) {
+ return module->methods->open(module,
+ SENSORS_HARDWARE_CONTROL, (struct hw_device_t**)device);
+}
+
+static inline int sensors_control_close(struct sensors_control_device_t* device) {
+ return device->common.close(&device->common);
+}
+
+static inline int sensors_data_open(const struct hw_module_t* module,
+ struct sensors_data_device_t** device) {
+ return module->methods->open(module,
+ SENSORS_HARDWARE_DATA, (struct hw_device_t**)device);
+}
+
+static inline int sensors_data_close(struct sensors_data_device_t* device) {
+ return device->common.close(&device->common);
+}
+
+
+__END_DECLS
+
+#endif // ANDROID_SENSORS_INTERFACE_H