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/*
* Copyright (C) 2010 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_INCLUDE_HARDWARE_GPS_H
#define ANDROID_INCLUDE_HARDWARE_GPS_H
#include <stdint.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <pthread.h>
#include <sys/socket.h>
#include <stdbool.h>
#include <hardware/hardware.h>
__BEGIN_DECLS
/**
* The id of this module
*/
#define GPS_HARDWARE_MODULE_ID "gps"
/** Milliseconds since January 1, 1970 */
typedef int64_t GpsUtcTime;
/** Maximum number of SVs for gps_sv_status_callback(). */
#define GPS_MAX_SVS 32
/** Maximum number of Measurements in gps_measurement_callback(). */
#define GPS_MAX_MEASUREMENT 32
/** Requested operational mode for GPS operation. */
typedef uint32_t GpsPositionMode;
// IMPORTANT: Note that the following values must match
// constants in GpsLocationProvider.java.
/** Mode for running GPS standalone (no assistance). */
#define GPS_POSITION_MODE_STANDALONE 0
/** AGPS MS-Based mode. */
#define GPS_POSITION_MODE_MS_BASED 1
/**
* AGPS MS-Assisted mode. This mode is not maintained by the platform anymore.
* It is strongly recommended to use GPS_POSITION_MODE_MS_BASE instead.
*/
#define GPS_POSITION_MODE_MS_ASSISTED 2
/** Requested recurrence mode for GPS operation. */
typedef uint32_t GpsPositionRecurrence;
// IMPORTANT: Note that the following values must match
// constants in GpsLocationProvider.java.
/** Receive GPS fixes on a recurring basis at a specified period. */
#define GPS_POSITION_RECURRENCE_PERIODIC 0
/** Request a single shot GPS fix. */
#define GPS_POSITION_RECURRENCE_SINGLE 1
/** GPS status event values. */
typedef uint16_t GpsStatusValue;
// IMPORTANT: Note that the following values must match
// constants in GpsLocationProvider.java.
/** GPS status unknown. */
#define GPS_STATUS_NONE 0
/** GPS has begun navigating. */
#define GPS_STATUS_SESSION_BEGIN 1
/** GPS has stopped navigating. */
#define GPS_STATUS_SESSION_END 2
/** GPS has powered on but is not navigating. */
#define GPS_STATUS_ENGINE_ON 3
/** GPS is powered off. */
#define GPS_STATUS_ENGINE_OFF 4
/** Flags to indicate which values are valid in a GpsLocation. */
typedef uint16_t GpsLocationFlags;
// IMPORTANT: Note that the following values must match
// constants in GpsLocationProvider.java.
/** GpsLocation has valid latitude and longitude. */
#define GPS_LOCATION_HAS_LAT_LONG 0x0001
/** GpsLocation has valid altitude. */
#define GPS_LOCATION_HAS_ALTITUDE 0x0002
/** GpsLocation has valid speed. */
#define GPS_LOCATION_HAS_SPEED 0x0004
/** GpsLocation has valid bearing. */
#define GPS_LOCATION_HAS_BEARING 0x0008
/** GpsLocation has valid accuracy. */
#define GPS_LOCATION_HAS_ACCURACY 0x0010
/** Flags for the gps_set_capabilities callback. */
/** GPS HAL schedules fixes for GPS_POSITION_RECURRENCE_PERIODIC mode.
If this is not set, then the framework will use 1000ms for min_interval
and will start and call start() and stop() to schedule the GPS.
*/
#define GPS_CAPABILITY_SCHEDULING 0x0000001
/** GPS supports MS-Based AGPS mode */
#define GPS_CAPABILITY_MSB 0x0000002
/** GPS supports MS-Assisted AGPS mode */
#define GPS_CAPABILITY_MSA 0x0000004
/** GPS supports single-shot fixes */
#define GPS_CAPABILITY_SINGLE_SHOT 0x0000008
/** GPS supports on demand time injection */
#define GPS_CAPABILITY_ON_DEMAND_TIME 0x0000010
/** GPS supports Geofencing */
#define GPS_CAPABILITY_GEOFENCING 0x0000020
/** GPS supports Measurements */
#define GPS_CAPABILITY_MEASUREMENTS 0x0000040
/** GPS supports Navigation Messages */
#define GPS_CAPABILITY_NAV_MESSAGES 0x0000080
/** Flags used to specify which aiding data to delete
when calling delete_aiding_data(). */
typedef uint16_t GpsAidingData;
// IMPORTANT: Note that the following values must match
// constants in GpsLocationProvider.java.
#define GPS_DELETE_EPHEMERIS 0x0001
#define GPS_DELETE_ALMANAC 0x0002
#define GPS_DELETE_POSITION 0x0004
#define GPS_DELETE_TIME 0x0008
#define GPS_DELETE_IONO 0x0010
#define GPS_DELETE_UTC 0x0020
#define GPS_DELETE_HEALTH 0x0040
#define GPS_DELETE_SVDIR 0x0080
#define GPS_DELETE_SVSTEER 0x0100
#define GPS_DELETE_SADATA 0x0200
#define GPS_DELETE_RTI 0x0400
#define GPS_DELETE_CELLDB_INFO 0x8000
#define GPS_DELETE_ALL 0xFFFF
/** AGPS type */
typedef uint16_t AGpsType;
#define AGPS_TYPE_SUPL 1
#define AGPS_TYPE_C2K 2
typedef uint16_t AGpsSetIDType;
#define AGPS_SETID_TYPE_NONE 0
#define AGPS_SETID_TYPE_IMSI 1
#define AGPS_SETID_TYPE_MSISDN 2
typedef uint16_t ApnIpType;
#define APN_IP_INVALID 0
#define APN_IP_IPV4 1
#define APN_IP_IPV6 2
#define APN_IP_IPV4V6 3
/**
* String length constants
*/
#define GPS_NI_SHORT_STRING_MAXLEN 256
#define GPS_NI_LONG_STRING_MAXLEN 2048
/**
* GpsNiType constants
*/
typedef uint32_t GpsNiType;
#define GPS_NI_TYPE_VOICE 1
#define GPS_NI_TYPE_UMTS_SUPL 2
#define GPS_NI_TYPE_UMTS_CTRL_PLANE 3
/**
* GpsNiNotifyFlags constants
*/
typedef uint32_t GpsNiNotifyFlags;
/** NI requires notification */
#define GPS_NI_NEED_NOTIFY 0x0001
/** NI requires verification */
#define GPS_NI_NEED_VERIFY 0x0002
/** NI requires privacy override, no notification/minimal trace */
#define GPS_NI_PRIVACY_OVERRIDE 0x0004
/**
* GPS NI responses, used to define the response in
* NI structures
*/
typedef int GpsUserResponseType;
#define GPS_NI_RESPONSE_ACCEPT 1
#define GPS_NI_RESPONSE_DENY 2
#define GPS_NI_RESPONSE_NORESP 3
/**
* NI data encoding scheme
*/
typedef int GpsNiEncodingType;
#define GPS_ENC_NONE 0
#define GPS_ENC_SUPL_GSM_DEFAULT 1
#define GPS_ENC_SUPL_UTF8 2
#define GPS_ENC_SUPL_UCS2 3
#define GPS_ENC_UNKNOWN -1
/** AGPS status event values. */
typedef uint16_t AGpsStatusValue;
/** GPS requests data connection for AGPS. */
#define GPS_REQUEST_AGPS_DATA_CONN 1
/** GPS releases the AGPS data connection. */
#define GPS_RELEASE_AGPS_DATA_CONN 2
/** AGPS data connection initiated */
#define GPS_AGPS_DATA_CONNECTED 3
/** AGPS data connection completed */
#define GPS_AGPS_DATA_CONN_DONE 4
/** AGPS data connection failed */
#define GPS_AGPS_DATA_CONN_FAILED 5
#define AGPS_REF_LOCATION_TYPE_GSM_CELLID 1
#define AGPS_REF_LOCATION_TYPE_UMTS_CELLID 2
#define AGPS_REG_LOCATION_TYPE_MAC 3
/** Network types for update_network_state "type" parameter */
#define AGPS_RIL_NETWORK_TYPE_MOBILE 0
#define AGPS_RIL_NETWORK_TYPE_WIFI 1
#define AGPS_RIL_NETWORK_TYPE_MOBILE_MMS 2
#define AGPS_RIL_NETWORK_TYPE_MOBILE_SUPL 3
#define AGPS_RIL_NETWORK_TTYPE_MOBILE_DUN 4
#define AGPS_RIL_NETWORK_TTYPE_MOBILE_HIPRI 5
#define AGPS_RIL_NETWORK_TTYPE_WIMAX 6
/**
* Flags to indicate what fields in GpsClock are valid.
*/
typedef uint16_t GpsClockFlags;
/** A valid 'leap second' is stored in the data structure. */
#define GPS_CLOCK_HAS_LEAP_SECOND (1<<0)
/** A valid 'time uncertainty' is stored in the data structure. */
#define GPS_CLOCK_HAS_TIME_UNCERTAINTY (1<<1)
/** A valid 'full bias' is stored in the data structure. */
#define GPS_CLOCK_HAS_FULL_BIAS (1<<2)
/** A valid 'bias' is stored in the data structure. */
#define GPS_CLOCK_HAS_BIAS (1<<3)
/** A valid 'bias uncertainty' is stored in the data structure. */
#define GPS_CLOCK_HAS_BIAS_UNCERTAINTY (1<<4)
/** A valid 'drift' is stored in the data structure. */
#define GPS_CLOCK_HAS_DRIFT (1<<5)
/** A valid 'drift uncertainty' is stored in the data structure. */
#define GPS_CLOCK_HAS_DRIFT_UNCERTAINTY (1<<6)
/**
* Enumeration of the available values for the GPS Clock type.
*/
typedef uint8_t GpsClockType;
/** The type is not available ot it is unknown. */
#define GPS_CLOCK_TYPE_UNKNOWN 0
/** The source of the time value reported by GPS clock is the local hardware clock. */
#define GPS_CLOCK_TYPE_LOCAL_HW_TIME 1
/**
* The source of the time value reported by GPS clock is the GPS time derived from satellites
* (epoch = Jan 6, 1980)
*/
#define GPS_CLOCK_TYPE_GPS_TIME 2
/**
* Flags to indicate what fields in GpsMeasurement are valid.
*/
typedef uint32_t GpsMeasurementFlags;
/** A valid 'snr' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_SNR (1<<0)
/** A valid 'elevation' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_ELEVATION (1<<1)
/** A valid 'elevation uncertainty' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_ELEVATION_UNCERTAINTY (1<<2)
/** A valid 'azimuth' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_AZIMUTH (1<<3)
/** A valid 'azimuth uncertainty' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_AZIMUTH_UNCERTAINTY (1<<4)
/** A valid 'pseudorange' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_PSEUDORANGE (1<<5)
/** A valid 'pseudorange uncertainty' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_PSEUDORANGE_UNCERTAINTY (1<<6)
/** A valid 'code phase' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_CODE_PHASE (1<<7)
/** A valid 'code phase uncertainty' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_CODE_PHASE_UNCERTAINTY (1<<8)
/** A valid 'carrier frequency' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_CARRIER_FREQUENCY (1<<9)
/** A valid 'carrier cycles' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_CARRIER_CYCLES (1<<10)
/** A valid 'carrier phase' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_CARRIER_PHASE (1<<11)
/** A valid 'carrier phase uncertainty' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_CARRIER_PHASE_UNCERTAINTY (1<<12)
/** A valid 'bit number' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_BIT_NUMBER (1<<13)
/** A valid 'time from last bit' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_TIME_FROM_LAST_BIT (1<<14)
/** A valid 'doppler shift' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_DOPPLER_SHIFT (1<<15)
/** A valid 'doppler shift uncertainty' is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_DOPPLER_SHIFT_UNCERTAINTY (1<<16)
/** A valid 'used in fix' flag is stored in the data structure. */
#define GPS_MEASUREMENT_HAS_USED_IN_FIX (1<<17)
/** The value of 'pseudorange rate' is uncorrected. */
#define GPS_MEASUREMENT_HAS_UNCORRECTED_PSEUDORANGE_RATE (1<<18)
/**
* Enumeration of the available values for the GPS Measurement's loss of lock.
*/
typedef uint8_t GpsLossOfLock;
/** The indicator is not available or it is unknown. */
#define GPS_LOSS_OF_LOCK_UNKNOWN 0
/** The measurement does not present any indication of loss of lock. */
#define GPS_LOSS_OF_LOCK_OK 1
/** Loss of lock between previous and current observation: cycle slip possible. */
#define GPS_LOSS_OF_LOCK_CYCLE_SLIP 2
/**
* Enumeration of available values for the GPS Measurement's multipath indicator.
*/
typedef uint8_t GpsMultipathIndicator;
/** The indicator is not available or unknown. */
#define GPS_MULTIPATH_INDICATOR_UNKNOWN 0
/** The measurement has been indicated to use multipath. */
#define GPS_MULTIPATH_INDICATOR_DETECTED 1
/** The measurement has been indicated Not to use multipath. */
#define GPS_MULTIPATH_INDICATOR_NOT_USED 2
/**
* Flags indicating the GPS measurement state.
* The expected behavior here is for GPS HAL to set all the flags that applies. For
* example, if the state for a satellite is only C/A code locked and bit synchronized,
* and there is still millisecond ambiguity, the state should be set as:
* GPS_MEASUREMENT_STATE_CODE_LOCK|GPS_MEASUREMENT_STATE_BIT_SYNC|GPS_MEASUREMENT_STATE_MSEC_AMBIGUOUS
* If GPS is still searching for a satellite, the corresponding state should be set to
* GPS_MEASUREMENT_STATE_UNKNOWN(0).
*/
typedef uint16_t GpsMeasurementState;
#define GPS_MEASUREMENT_STATE_UNKNOWN 0
#define GPS_MEASUREMENT_STATE_CODE_LOCK (1<<0)
#define GPS_MEASUREMENT_STATE_BIT_SYNC (1<<1)
#define GPS_MEASUREMENT_STATE_SUBFRAME_SYNC (1<<2)
#define GPS_MEASUREMENT_STATE_TOW_DECODED (1<<3)
#define GPS_MEASUREMENT_STATE_MSEC_AMBIGUOUS (1<<4)
/**
* Flags indicating the Accumulated Delta Range's states.
*/
typedef uint16_t GpsAccumulatedDeltaRangeState;
#define GPS_ADR_STATE_UNKNOWN 0
#define GPS_ADR_STATE_VALID (1<<0)
#define GPS_ADR_STATE_RESET (1<<1)
#define GPS_ADR_STATE_CYCLE_SLIP (1<<2)
/**
* Enumeration of available values to indicate the available GPS Navigation message types.
*/
typedef uint8_t GpsNavigationMessageType;
/** The message type is unknown. */
#define GPS_NAVIGATION_MESSAGE_TYPE_UNKNOWN 0
/** L1 C/A message contained in the structure. */
#define GPS_NAVIGATION_MESSAGE_TYPE_L1CA 1
/** L2-CNAV message contained in the structure. */
#define GPS_NAVIGATION_MESSAGE_TYPE_L2CNAV 2
/** L5-CNAV message contained in the structure. */
#define GPS_NAVIGATION_MESSAGE_TYPE_L5CNAV 3
/** CNAV-2 message contained in the structure. */
#define GPS_NAVIGATION_MESSAGE_TYPE_CNAV2 4
/**
* Status of Navigation Message
* When a message is received properly without any parity error in its navigation words, the
* status should be set to NAV_MESSAGE_STATUS_PARITY_PASSED. But if a message is received
* with words that failed parity check, but GPS is able to correct those words, the status
* should be set to NAV_MESSAGE_STATUS_PARITY_REBUILT.
* No need to send any navigation message that contains words with parity error and cannot be
* corrected.
*/
typedef uint16_t NavigationMessageStatus;
#define NAV_MESSAGE_STATUS_UNKONW 0
#define NAV_MESSAGE_STATUS_PARITY_PASSED (1<<0)
#define NAV_MESSAGE_STATUS_PARITY_REBUILT (1<<1)
/**
* Name for the GPS XTRA interface.
*/
#define GPS_XTRA_INTERFACE "gps-xtra"
/**
* Name for the GPS DEBUG interface.
*/
#define GPS_DEBUG_INTERFACE "gps-debug"
/**
* Name for the AGPS interface.
*/
#define AGPS_INTERFACE "agps"
/**
* Name of the Supl Certificate interface.
*/
#define SUPL_CERTIFICATE_INTERFACE "supl-certificate"
/**
* Name for NI interface
*/
#define GPS_NI_INTERFACE "gps-ni"
/**
* Name for the AGPS-RIL interface.
*/
#define AGPS_RIL_INTERFACE "agps_ril"
/**
* Name for the GPS_Geofencing interface.
*/
#define GPS_GEOFENCING_INTERFACE "gps_geofencing"
/**
* Name of the GPS Measurements interface.
*/
#define GPS_MEASUREMENT_INTERFACE "gps_measurement"
/**
* Name of the GPS navigation message interface.
*/
#define GPS_NAVIGATION_MESSAGE_INTERFACE "gps_navigation_message"
/**
* Name of the GNSS/GPS configuration interface.
*/
#define GNSS_CONFIGURATION_INTERFACE "gnss_configuration"
/** Represents a location. */
typedef struct {
/** set to sizeof(GpsLocation) */
size_t size;
/** Contains GpsLocationFlags bits. */
uint16_t flags;
/** Represents latitude in degrees. */
double latitude;
/** Represents longitude in degrees. */
double longitude;
/** Represents altitude in meters above the WGS 84 reference
* ellipsoid. */
double altitude;
/** Represents speed in meters per second. */
float speed;
/** Represents heading in degrees. */
float bearing;
/** Represents expected accuracy in meters. */
float accuracy;
/** Timestamp for the location fix. */
GpsUtcTime timestamp;
} GpsLocation;
/** Represents the status. */
typedef struct {
/** set to sizeof(GpsStatus) */
size_t size;
GpsStatusValue status;
} GpsStatus;
/** Represents SV information. */
typedef struct {
/** set to sizeof(GpsSvInfo) */
size_t size;
/** Pseudo-random number for the SV. */
int prn;
/** Signal to noise ratio. */
float snr;
/** Elevation of SV in degrees. */
float elevation;
/** Azimuth of SV in degrees. */
float azimuth;
} GpsSvInfo;
/** Represents SV status. */
typedef struct {
/** set to sizeof(GpsSvStatus) */
size_t size;
/** Number of SVs currently visible. */
int num_svs;
/** Contains an array of SV information. */
GpsSvInfo sv_list[GPS_MAX_SVS];
/** Represents a bit mask indicating which SVs
* have ephemeris data.
*/
uint32_t ephemeris_mask;
/** Represents a bit mask indicating which SVs
* have almanac data.
*/
uint32_t almanac_mask;
/**
* Represents a bit mask indicating which SVs
* were used for computing the most recent position fix.
*/
uint32_t used_in_fix_mask;
} GpsSvStatus;
/* 2G and 3G */
/* In 3G lac is discarded */
typedef struct {
uint16_t type;
uint16_t mcc;
uint16_t mnc;
uint16_t lac;
uint32_t cid;
} AGpsRefLocationCellID;
typedef struct {
uint8_t mac[6];
} AGpsRefLocationMac;
/** Represents ref locations */
typedef struct {
uint16_t type;
union {
AGpsRefLocationCellID cellID;
AGpsRefLocationMac mac;
} u;
} AGpsRefLocation;
/** Callback with location information.
* Can only be called from a thread created by create_thread_cb.
*/
typedef void (* gps_location_callback)(GpsLocation* location);
/** Callback with status information.
* Can only be called from a thread created by create_thread_cb.
*/
typedef void (* gps_status_callback)(GpsStatus* status);
/**
* Callback with SV status information.
* Can only be called from a thread created by create_thread_cb.
*/
typedef void (* gps_sv_status_callback)(GpsSvStatus* sv_info);
/** Callback for reporting NMEA sentences.
* Can only be called from a thread created by create_thread_cb.
*/
typedef void (* gps_nmea_callback)(GpsUtcTime timestamp, const char* nmea, int length);
/** Callback to inform framework of the GPS engine's capabilities.
* Capability parameter is a bit field of GPS_CAPABILITY_* flags.
*/
typedef void (* gps_set_capabilities)(uint32_t capabilities);
/** Callback utility for acquiring the GPS wakelock.
* This can be used to prevent the CPU from suspending while handling GPS events.
*/
typedef void (* gps_acquire_wakelock)();
/** Callback utility for releasing the GPS wakelock. */
typedef void (* gps_release_wakelock)();
/** Callback for requesting NTP time */
typedef void (* gps_request_utc_time)();
/** Callback for creating a thread that can call into the Java framework code.
* This must be used to create any threads that report events up to the framework.
*/
typedef pthread_t (* gps_create_thread)(const char* name, void (*start)(void *), void* arg);
/** GPS callback structure. */
typedef struct {
/** set to sizeof(GpsCallbacks) */
size_t size;
gps_location_callback location_cb;
gps_status_callback status_cb;
gps_sv_status_callback sv_status_cb;
gps_nmea_callback nmea_cb;
gps_set_capabilities set_capabilities_cb;
gps_acquire_wakelock acquire_wakelock_cb;
gps_release_wakelock release_wakelock_cb;
gps_create_thread create_thread_cb;
gps_request_utc_time request_utc_time_cb;
} GpsCallbacks;
/** Represents the standard GPS interface. */
typedef struct {
/** set to sizeof(GpsInterface) */
size_t size;
/**
* Opens the interface and provides the callback routines
* to the implementation of this interface.
*/
int (*init)( GpsCallbacks* callbacks );
/** Starts navigating. */
int (*start)( void );
/** Stops navigating. */
int (*stop)( void );
/** Closes the interface. */
void (*cleanup)( void );
/** Injects the current time. */
int (*inject_time)(GpsUtcTime time, int64_t timeReference,
int uncertainty);
/** Injects current location from another location provider
* (typically cell ID).
* latitude and longitude are measured in degrees
* expected accuracy is measured in meters
*/
int (*inject_location)(double latitude, double longitude, float accuracy);
/**
* Specifies that the next call to start will not use the
* information defined in the flags. GPS_DELETE_ALL is passed for
* a cold start.
*/
void (*delete_aiding_data)(GpsAidingData flags);
/**
* min_interval represents the time between fixes in milliseconds.
* preferred_accuracy represents the requested fix accuracy in meters.
* preferred_time represents the requested time to first fix in milliseconds.
*
* 'mode' parameter should be one of GPS_POSITION_MODE_MS_BASE
* or GPS_POSITION_MODE_STANDALONE.
* It is allowed by the platform (and it is recommended) to fallback to
* GPS_POSITION_MODE_MS_BASE if GPS_POSITION_MODE_MS_ASSISTED is passed in, and
* GPS_POSITION_MODE_MS_BASED is supported.
*/
int (*set_position_mode)(GpsPositionMode mode, GpsPositionRecurrence recurrence,
uint32_t min_interval, uint32_t preferred_accuracy, uint32_t preferred_time);
/** Get a pointer to extension information. */
const void* (*get_extension)(const char* name);
} GpsInterface;
/** Callback to request the client to download XTRA data.
* The client should download XTRA data and inject it by calling inject_xtra_data().
* Can only be called from a thread created by create_thread_cb.
*/
typedef void (* gps_xtra_download_request)();
/** Callback structure for the XTRA interface. */
typedef struct {
gps_xtra_download_request download_request_cb;
gps_create_thread create_thread_cb;
} GpsXtraCallbacks;
/** Extended interface for XTRA support. */
typedef struct {
/** set to sizeof(GpsXtraInterface) */
size_t size;
/**
* Opens the XTRA interface and provides the callback routines
* to the implementation of this interface.
*/
int (*init)( GpsXtraCallbacks* callbacks );
/** Injects XTRA data into the GPS. */
int (*inject_xtra_data)( char* data, int length );
} GpsXtraInterface;
/** Extended interface for DEBUG support. */
typedef struct {
/** set to sizeof(GpsDebugInterface) */
size_t size;
/**
* This function should return any information that the native
* implementation wishes to include in a bugreport.
*/
size_t (*get_internal_state)(char* buffer, size_t bufferSize);
} GpsDebugInterface;
#pragma pack(push,4)
// We need to keep the alignment of this data structure to 4-bytes, to ensure that in 64-bit
// environments the size of this legacy definition does not collide with _v2. Implementations should
// be using _v2 and _v3, so it's OK to pay the 'unaligned' penalty in 64-bit if an old
// implementation is still in use.
/** Represents the status of AGPS. */
typedef struct {
/** set to sizeof(AGpsStatus_v1) */
size_t size;
AGpsType type;
AGpsStatusValue status;
} AGpsStatus_v1;
#pragma pack(pop)
/** Represents the status of AGPS augmented with a IPv4 address field. */
typedef struct {
/** set to sizeof(AGpsStatus_v2) */
size_t size;
AGpsType type;
AGpsStatusValue status;
uint32_t ipaddr;
} AGpsStatus_v2;
/* Represents the status of AGPS augmented to support IPv4 and IPv6. */
typedef struct {
/** set to sizeof(AGpsStatus_v3) */
size_t size;
AGpsType type;
AGpsStatusValue status;
/**
* Must be set to a valid IPv4 address if the field 'addr' contains an IPv4
* address, or set to INADDR_NONE otherwise.
*/
uint32_t ipaddr;
/**
* Must contain the IPv4 (AF_INET) or IPv6 (AF_INET6) address to report.
* Any other value of addr.ss_family will be rejected.
* */
struct sockaddr_storage addr;
} AGpsStatus_v3;
typedef AGpsStatus_v3 AGpsStatus;
/** Callback with AGPS status information.
* Can only be called from a thread created by create_thread_cb.
*/
typedef void (* agps_status_callback)(AGpsStatus* status);
/** Callback structure for the AGPS interface. */
typedef struct {
agps_status_callback status_cb;
gps_create_thread create_thread_cb;
} AGpsCallbacks;
/** Extended interface for AGPS support. */
typedef struct {
/** set to sizeof(AGpsInterface_v1) */
size_t size;
/**
* Opens the AGPS interface and provides the callback routines
* to the implementation of this interface.
*/
void (*init)( AGpsCallbacks* callbacks );
/**
* Notifies that a data connection is available and sets
* the name of the APN to be used for SUPL.
*/
int (*data_conn_open)( const char* apn );
/**
* Notifies that the AGPS data connection has been closed.
*/
int (*data_conn_closed)();
/**
* Notifies that a data connection is not available for AGPS.
*/
int (*data_conn_failed)();
/**
* Sets the hostname and port for the AGPS server.
*/
int (*set_server)( AGpsType type, const char* hostname, int port );
} AGpsInterface_v1;
/**
* Extended interface for AGPS support, it is augmented to enable to pass
* extra APN data.
*/
typedef struct {
/** set to sizeof(AGpsInterface_v2) */
size_t size;
/**
* Opens the AGPS interface and provides the callback routines to the
* implementation of this interface.
*/
void (*init)(AGpsCallbacks* callbacks);
/**
* Deprecated.
* If the HAL supports AGpsInterface_v2 this API will not be used, see
* data_conn_open_with_apn_ip_type for more information.
*/
int (*data_conn_open)(const char* apn);
/**
* Notifies that the AGPS data connection has been closed.
*/
int (*data_conn_closed)();
/**
* Notifies that a data connection is not available for AGPS.
*/
int (*data_conn_failed)();
/**
* Sets the hostname and port for the AGPS server.
*/
int (*set_server)(AGpsType type, const char* hostname, int port);
/**
* Notifies that a data connection is available and sets the name of the
* APN, and its IP type, to be used for SUPL connections.
*/
int (*data_conn_open_with_apn_ip_type)(
const char* apn,
ApnIpType apnIpType);
} AGpsInterface_v2;
typedef AGpsInterface_v2 AGpsInterface;
/** Error codes associated with certificate operations */
#define AGPS_CERTIFICATE_OPERATION_SUCCESS 0
#define AGPS_CERTIFICATE_ERROR_GENERIC -100
#define AGPS_CERTIFICATE_ERROR_TOO_MANY_CERTIFICATES -101
/** A data structure that represents an X.509 certificate using DER encoding */
typedef struct {
size_t length;
u_char* data;
} DerEncodedCertificate;
/**
* A type definition for SHA1 Fingerprints used to identify X.509 Certificates
* The Fingerprint is a digest of the DER Certificate that uniquely identifies it.
*/
typedef struct {
u_char data[20];
} Sha1CertificateFingerprint;
/** AGPS Interface to handle SUPL certificate operations */
typedef struct {
/** set to sizeof(SuplCertificateInterface) */
size_t size;
/**
* Installs a set of Certificates used for SUPL connections to the AGPS server.
* If needed the HAL should find out internally any certificates that need to be removed to
* accommodate the certificates to install.
* The certificates installed represent a full set of valid certificates needed to connect to
* AGPS SUPL servers.
* The list of certificates is required, and all must be available at the same time, when trying
* to establish a connection with the AGPS Server.
*
* Parameters:
* certificates - A pointer to an array of DER encoded certificates that are need to be
* installed in the HAL.
* length - The number of certificates to install.
* Returns:
* AGPS_CERTIFICATE_OPERATION_SUCCESS if the operation is completed successfully
* AGPS_CERTIFICATE_ERROR_TOO_MANY_CERTIFICATES if the HAL cannot store the number of
* certificates attempted to be installed, the state of the certificates stored should
* remain the same as before on this error case.
*
* IMPORTANT:
* If needed the HAL should find out internally the set of certificates that need to be
* removed to accommodate the certificates to install.
*/
int (*install_certificates) ( const DerEncodedCertificate* certificates, size_t length );
/**
* Notifies the HAL that a list of certificates used for SUPL connections are revoked. It is
* expected that the given set of certificates is removed from the internal store of the HAL.
*
* Parameters:
* fingerprints - A pointer to an array of SHA1 Fingerprints to identify the set of
* certificates to revoke.
* length - The number of fingerprints provided.
* Returns:
* AGPS_CERTIFICATE_OPERATION_SUCCESS if the operation is completed successfully.
*
* IMPORTANT:
* If any of the certificates provided (through its fingerprint) is not known by the HAL,
* it should be ignored and continue revoking/deleting the rest of them.
*/
int (*revoke_certificates) ( const Sha1CertificateFingerprint* fingerprints, size_t length );
} SuplCertificateInterface;
/** Represents an NI request */
typedef struct {
/** set to sizeof(GpsNiNotification) */
size_t size;
/**
* An ID generated by HAL to associate NI notifications and UI
* responses
*/
int notification_id;
/**
* An NI type used to distinguish different categories of NI
* events, such as GPS_NI_TYPE_VOICE, GPS_NI_TYPE_UMTS_SUPL, ...
*/
GpsNiType ni_type;
/**
* Notification/verification options, combinations of GpsNiNotifyFlags constants
*/
GpsNiNotifyFlags notify_flags;
/**
* Timeout period to wait for user response.
* Set to 0 for no time out limit.
*/
int timeout;
/**
* Default response when time out.
*/
GpsUserResponseType default_response;
/**
* Requestor ID
*/
char requestor_id[GPS_NI_SHORT_STRING_MAXLEN];
/**
* Notification message. It can also be used to store client_id in some cases
*/
char text[GPS_NI_LONG_STRING_MAXLEN];
/**
* Client name decoding scheme
*/
GpsNiEncodingType requestor_id_encoding;
/**
* Client name decoding scheme
*/
GpsNiEncodingType text_encoding;
/**
* A pointer to extra data. Format:
* key_1 = value_1
* key_2 = value_2
*/
char extras[GPS_NI_LONG_STRING_MAXLEN];
} GpsNiNotification;
/** Callback with NI notification.
* Can only be called from a thread created by create_thread_cb.
*/
typedef void (*gps_ni_notify_callback)(GpsNiNotification *notification);
/** GPS NI callback structure. */
typedef struct
{
/**
* Sends the notification request from HAL to GPSLocationProvider.
*/
gps_ni_notify_callback notify_cb;
gps_create_thread create_thread_cb;
} GpsNiCallbacks;
/**
* Extended interface for Network-initiated (NI) support.
*/
typedef struct
{
/** set to sizeof(GpsNiInterface) */
size_t size;
/** Registers the callbacks for HAL to use. */
void (*init) (GpsNiCallbacks *callbacks);
/** Sends a response to HAL. */
void (*respond) (int notif_id, GpsUserResponseType user_response);
} GpsNiInterface;
struct gps_device_t {
struct hw_device_t common;
/**
* Set the provided lights to the provided values.
*
* Returns: 0 on succes, error code on failure.
*/
const GpsInterface* (*get_gps_interface)(struct gps_device_t* dev);
};
#define AGPS_RIL_REQUEST_SETID_IMSI (1<<0L)
#define AGPS_RIL_REQUEST_SETID_MSISDN (1<<1L)
#define AGPS_RIL_REQUEST_REFLOC_CELLID (1<<0L)
#define AGPS_RIL_REQUEST_REFLOC_MAC (1<<1L)
typedef void (*agps_ril_request_set_id)(uint32_t flags);
typedef void (*agps_ril_request_ref_loc)(uint32_t flags);
typedef struct {
agps_ril_request_set_id request_setid;
agps_ril_request_ref_loc request_refloc;
gps_create_thread create_thread_cb;
} AGpsRilCallbacks;
/** Extended interface for AGPS_RIL support. */
typedef struct {
/** set to sizeof(AGpsRilInterface) */
size_t size;
/**
* Opens the AGPS interface and provides the callback routines
* to the implementation of this interface.
*/
void (*init)( AGpsRilCallbacks* callbacks );
/**
* Sets the reference location.
*/
void (*set_ref_location) (const AGpsRefLocation *agps_reflocation, size_t sz_struct);
/**
* Sets the set ID.
*/
void (*set_set_id) (AGpsSetIDType type, const char* setid);
/**
* Send network initiated message.
*/
void (*ni_message) (uint8_t *msg, size_t len);
/**
* Notify GPS of network status changes.
* These parameters match values in the android.net.NetworkInfo class.
*/
void (*update_network_state) (int connected, int type, int roaming, const char* extra_info);
/**
* Notify GPS of network status changes.
* These parameters match values in the android.net.NetworkInfo class.
*/
void (*update_network_availability) (int avaiable, const char* apn);
} AGpsRilInterface;
/**
* GPS Geofence.
* There are 3 states associated with a Geofence: Inside, Outside, Unknown.
* There are 3 transitions: ENTERED, EXITED, UNCERTAIN.
*
* An example state diagram with confidence level: 95% and Unknown time limit
* set as 30 secs is shown below. (confidence level and Unknown time limit are
* explained latter)
* ____________________________
* | Unknown (30 secs) |
* """"""""""""""""""""""""""""
* ^ | | ^
* UNCERTAIN| |ENTERED EXITED| |UNCERTAIN
* | v v |
* ________ EXITED _________
* | Inside | -----------> | Outside |
* | | <----------- | |
* """""""" ENTERED """""""""
*
* Inside state: We are 95% confident that the user is inside the geofence.
* Outside state: We are 95% confident that the user is outside the geofence
* Unknown state: Rest of the time.
*
* The Unknown state is better explained with an example:
*
* __________
* | c|
* | ___ | _______
* | |a| | | b |
* | """ | """""""
* | |
* """"""""""
* In the diagram above, "a" and "b" are 2 geofences and "c" is the accuracy
* circle reported by the GPS subsystem. Now with regard to "b", the system is
* confident that the user is outside. But with regard to "a" is not confident
* whether it is inside or outside the geofence. If the accuracy remains the
* same for a sufficient period of time, the UNCERTAIN transition would be
* triggered with the state set to Unknown. If the accuracy improves later, an
* appropriate transition should be triggered. This "sufficient period of time"
* is defined by the parameter in the add_geofence_area API.
* In other words, Unknown state can be interpreted as a state in which the
* GPS subsystem isn't confident enough that the user is either inside or
* outside the Geofence. It moves to Unknown state only after the expiry of the
* timeout.
*
* The geofence callback needs to be triggered for the ENTERED and EXITED
* transitions, when the GPS system is confident that the user has entered
* (Inside state) or exited (Outside state) the Geofence. An implementation
* which uses a value of 95% as the confidence is recommended. The callback
* should be triggered only for the transitions requested by the
* add_geofence_area call.
*
* Even though the diagram and explanation talks about states and transitions,
* the callee is only interested in the transistions. The states are mentioned
* here for illustrative purposes.
*
* Startup Scenario: When the device boots up, if an application adds geofences,
* and then we get an accurate GPS location fix, it needs to trigger the
* appropriate (ENTERED or EXITED) transition for every Geofence it knows about.
* By default, all the Geofences will be in the Unknown state.
*
* When the GPS system is unavailable, gps_geofence_status_callback should be
* called to inform the upper layers of the same. Similarly, when it becomes
* available the callback should be called. This is a global state while the
* UNKNOWN transition described above is per geofence.
*
* An important aspect to note is that users of this API (framework), will use
* other subsystems like wifi, sensors, cell to handle Unknown case and
* hopefully provide a definitive state transition to the third party
* application. GPS Geofence will just be a signal indicating what the GPS
* subsystem knows about the Geofence.
*
*/
#define GPS_GEOFENCE_ENTERED (1<<0L)
#define GPS_GEOFENCE_EXITED (1<<1L)
#define GPS_GEOFENCE_UNCERTAIN (1<<2L)
#define GPS_GEOFENCE_UNAVAILABLE (1<<0L)
#define GPS_GEOFENCE_AVAILABLE (1<<1L)
#define GPS_GEOFENCE_OPERATION_SUCCESS 0
#define GPS_GEOFENCE_ERROR_TOO_MANY_GEOFENCES -100
#define GPS_GEOFENCE_ERROR_ID_EXISTS -101
#define GPS_GEOFENCE_ERROR_ID_UNKNOWN -102
#define GPS_GEOFENCE_ERROR_INVALID_TRANSITION -103
#define GPS_GEOFENCE_ERROR_GENERIC -149
/**
* The callback associated with the geofence.
* Parameters:
* geofence_id - The id associated with the add_geofence_area.
* location - The current GPS location.
* transition - Can be one of GPS_GEOFENCE_ENTERED, GPS_GEOFENCE_EXITED,
* GPS_GEOFENCE_UNCERTAIN.
* timestamp - Timestamp when the transition was detected.
*
* The callback should only be called when the caller is interested in that
* particular transition. For instance, if the caller is interested only in
* ENTERED transition, then the callback should NOT be called with the EXITED
* transition.
*
* IMPORTANT: If a transition is triggered resulting in this callback, the GPS
* subsystem will wake up the application processor, if its in suspend state.
*/
typedef void (*gps_geofence_transition_callback) (int32_t geofence_id, GpsLocation* location,
int32_t transition, GpsUtcTime timestamp);
/**
* The callback associated with the availability of the GPS system for geofencing
* monitoring. If the GPS system determines that it cannot monitor geofences
* because of lack of reliability or unavailability of the GPS signals, it will
* call this callback with GPS_GEOFENCE_UNAVAILABLE parameter.
*
* Parameters:
* status - GPS_GEOFENCE_UNAVAILABLE or GPS_GEOFENCE_AVAILABLE.
* last_location - Last known location.
*/
typedef void (*gps_geofence_status_callback) (int32_t status, GpsLocation* last_location);
/**
* The callback associated with the add_geofence call.
*
* Parameter:
* geofence_id - Id of the geofence.
* status - GPS_GEOFENCE_OPERATION_SUCCESS
* GPS_GEOFENCE_ERROR_TOO_MANY_GEOFENCES - geofence limit has been reached.
* GPS_GEOFENCE_ERROR_ID_EXISTS - geofence with id already exists
* GPS_GEOFENCE_ERROR_INVALID_TRANSITION - the monitorTransition contains an
* invalid transition
* GPS_GEOFENCE_ERROR_GENERIC - for other errors.
*/
typedef void (*gps_geofence_add_callback) (int32_t geofence_id, int32_t status);
/**
* The callback associated with the remove_geofence call.
*
* Parameter:
* geofence_id - Id of the geofence.
* status - GPS_GEOFENCE_OPERATION_SUCCESS
* GPS_GEOFENCE_ERROR_ID_UNKNOWN - for invalid id
* GPS_GEOFENCE_ERROR_GENERIC for others.
*/
typedef void (*gps_geofence_remove_callback) (int32_t geofence_id, int32_t status);
/**
* The callback associated with the pause_geofence call.
*
* Parameter:
* geofence_id - Id of the geofence.
* status - GPS_GEOFENCE_OPERATION_SUCCESS
* GPS_GEOFENCE_ERROR_ID_UNKNOWN - for invalid id
* GPS_GEOFENCE_ERROR_INVALID_TRANSITION -
* when monitor_transitions is invalid
* GPS_GEOFENCE_ERROR_GENERIC for others.
*/
typedef void (*gps_geofence_pause_callback) (int32_t geofence_id, int32_t status);
/**
* The callback associated with the resume_geofence call.
*
* Parameter:
* geofence_id - Id of the geofence.
* status - GPS_GEOFENCE_OPERATION_SUCCESS
* GPS_GEOFENCE_ERROR_ID_UNKNOWN - for invalid id
* GPS_GEOFENCE_ERROR_GENERIC for others.
*/
typedef void (*gps_geofence_resume_callback) (int32_t geofence_id, int32_t status);
typedef struct {
gps_geofence_transition_callback geofence_transition_callback;
gps_geofence_status_callback geofence_status_callback;
gps_geofence_add_callback geofence_add_callback;
gps_geofence_remove_callback geofence_remove_callback;
gps_geofence_pause_callback geofence_pause_callback;
gps_geofence_resume_callback geofence_resume_callback;
gps_create_thread create_thread_cb;
} GpsGeofenceCallbacks;
/** Extended interface for GPS_Geofencing support */
typedef struct {
/** set to sizeof(GpsGeofencingInterface) */
size_t size;
/**
* Opens the geofence interface and provides the callback routines
* to the implementation of this interface.
*/
void (*init)( GpsGeofenceCallbacks* callbacks );
/**
* Add a geofence area. This api currently supports circular geofences.
* Parameters:
* geofence_id - The id for the geofence. If a geofence with this id
* already exists, an error value (GPS_GEOFENCE_ERROR_ID_EXISTS)
* should be returned.
* latitude, longtitude, radius_meters - The lat, long and radius
* (in meters) for the geofence
* last_transition - The current state of the geofence. For example, if
* the system already knows that the user is inside the geofence,
* this will be set to GPS_GEOFENCE_ENTERED. In most cases, it
* will be GPS_GEOFENCE_UNCERTAIN.
* monitor_transition - Which transitions to monitor. Bitwise OR of
* GPS_GEOFENCE_ENTERED, GPS_GEOFENCE_EXITED and
* GPS_GEOFENCE_UNCERTAIN.
* notification_responsiveness_ms - Defines the best-effort description
* of how soon should the callback be called when the transition
* associated with the Geofence is triggered. For instance, if set
* to 1000 millseconds with GPS_GEOFENCE_ENTERED, the callback
* should be called 1000 milliseconds within entering the geofence.
* This parameter is defined in milliseconds.
* NOTE: This is not to be confused with the rate that the GPS is
* polled at. It is acceptable to dynamically vary the rate of
* sampling the GPS for power-saving reasons; thus the rate of
* sampling may be faster or slower than this.
* unknown_timer_ms - The time limit after which the UNCERTAIN transition
* should be triggered. This parameter is defined in milliseconds.
* See above for a detailed explanation.
*/
void (*add_geofence_area) (int32_t geofence_id, double latitude, double longitude,
double radius_meters, int last_transition, int monitor_transitions,
int notification_responsiveness_ms, int unknown_timer_ms);
/**
* Pause monitoring a particular geofence.
* Parameters:
* geofence_id - The id for the geofence.
*/
void (*pause_geofence) (int32_t geofence_id);
/**
* Resume monitoring a particular geofence.
* Parameters:
* geofence_id - The id for the geofence.
* monitor_transitions - Which transitions to monitor. Bitwise OR of
* GPS_GEOFENCE_ENTERED, GPS_GEOFENCE_EXITED and
* GPS_GEOFENCE_UNCERTAIN.
* This supersedes the value associated provided in the
* add_geofence_area call.
*/
void (*resume_geofence) (int32_t geofence_id, int monitor_transitions);
/**
* Remove a geofence area. After the function returns, no notifications
* should be sent.
* Parameter:
* geofence_id - The id for the geofence.
*/
void (*remove_geofence_area) (int32_t geofence_id);
} GpsGeofencingInterface;
/**
* Represents an estimate of the GPS clock time.
*/
typedef struct {
/** set to sizeof(GpsClock) */
size_t size;
/** A set of flags indicating the validity of the fields in this data structure. */
GpsClockFlags flags;
/**
* Leap second data.
* The sign of the value is defined by the following equation:
* utc_time_ns = time_ns + (full_bias_ns + bias_ns) - leap_second * 1,000,000,000
*
* If the data is available 'flags' must contain GPS_CLOCK_HAS_LEAP_SECOND.
*/
int16_t leap_second;
/**
* Indicates the type of time reported by the 'time_ns' field.
* This is a Mandatory field.
*/
GpsClockType type;
/**
* The GPS receiver internal clock value. This can be either the local hardware clock value
* (GPS_CLOCK_TYPE_LOCAL_HW_TIME), or the current GPS time derived inside GPS receiver
* (GPS_CLOCK_TYPE_GPS_TIME). The field 'type' defines the time reported.
*
* For local hardware clock, this value is expected to be monotonically increasing during
* the reporting session. The real GPS time can be derived by compensating the 'full bias'
* (when it is available) from this value.
*
* For GPS time, this value is expected to be the best estimation of current GPS time that GPS
* receiver can achieve. Set the 'time uncertainty' appropriately when GPS time is specified.
*
* Sub-nanosecond accuracy can be provided by means of the 'bias' field.
* The value contains the 'time uncertainty' in it.
*
* This is a Mandatory field.
*/
int64_t time_ns;
/**
* 1-Sigma uncertainty associated with the clock's time in nanoseconds.
* The uncertainty is represented as an absolute (single sided) value.
*
* This value should be set if GPS_CLOCK_TYPE_GPS_TIME is set.
* If the data is available 'flags' must contain GPS_CLOCK_HAS_TIME_UNCERTAINTY.
*/
double time_uncertainty_ns;
/**
* The difference between hardware clock ('time' field) inside GPS receiver and the true GPS
* time since 0000Z, January 6, 1980, in nanoseconds.
* This value is used if and only if GPS_CLOCK_TYPE_LOCAL_HW_TIME is set, and GPS receiver
* has solved the clock for GPS time.
* The caller is responsible for using the 'bias uncertainty' field for quality check.
*
* The sign of the value is defined by the following equation:
* true time (GPS time) = time_ns + (full_bias_ns + bias_ns)
*
* This value contains the 'bias uncertainty' in it.
* If the data is available 'flags' must contain GPS_CLOCK_HAS_FULL_BIAS.
*/
int64_t full_bias_ns;
/**
* Sub-nanosecond bias.
* The value contains the 'bias uncertainty' in it.
*
* If the data is available 'flags' must contain GPS_CLOCK_HAS_BIAS.
*/
double bias_ns;
/**
* 1-Sigma uncertainty associated with the clock's bias in nanoseconds.
* The uncertainty is represented as an absolute (single sided) value.
*
* If the data is available 'flags' must contain GPS_CLOCK_HAS_BIAS_UNCERTAINTY.
*/
double bias_uncertainty_ns;
/**
* The clock's drift in nanoseconds (per second).
* A positive value means that the frequency is higher than the nominal frequency.
*
* The value contains the 'drift uncertainty' in it.
* If the data is available 'flags' must contain GPS_CLOCK_HAS_DRIFT.
*
* If GpsMeasurement's 'flags' field contains GPS_MEASUREMENT_HAS_UNCORRECTED_PSEUDORANGE_RATE,
* it is encouraged that this field is also provided.
*/
double drift_nsps;
/**
* 1-Sigma uncertainty associated with the clock's drift in nanoseconds (per second).
* The uncertainty is represented as an absolute (single sided) value.
*
* If the data is available 'flags' must contain GPS_CLOCK_HAS_DRIFT_UNCERTAINTY.
*/
double drift_uncertainty_nsps;
} GpsClock;
/**
* Represents a GPS Measurement, it contains raw and computed information.
*/
typedef struct {
/** set to sizeof(GpsMeasurement) */
size_t size;
/** A set of flags indicating the validity of the fields in this data structure. */
GpsMeasurementFlags flags;
/**
* Pseudo-random number in the range of [1, 32]
* This is a Mandatory value.
*/
int8_t prn;
/**
* Time offset at which the measurement was taken in nanoseconds.
* The reference receiver's time is specified by GpsData::clock::time_ns and should be
* interpreted in the same way as indicated by GpsClock::type.
*
* The sign of time_offset_ns is given by the following equation:
* measurement time = GpsClock::time_ns + time_offset_ns
*
* It provides an individual time-stamp for the measurement, and allows sub-nanosecond accuracy.
* This is a Mandatory value.
*/
double time_offset_ns;
/**
* Per satellite sync state. It represents the current sync state for the associated satellite.
* Based on the sync state, the 'received GPS tow' field should be interpreted accordingly.
*
* This is a Mandatory value.
*/
GpsMeasurementState state;
/**
* Received GPS Time-of-Week at the measurement time, in nanoseconds.
* The value is relative to the beginning of the current GPS week.
*
* Given the highest sync state that can be achieved, per each satellite, valid range for
* this field can be:
* Searching : [ 0 ] : GPS_MEASUREMENT_STATE_UNKNOWN
* C/A code lock : [ 0 1ms ] : GPS_MEASUREMENT_STATE_CODE_LOCK is set
* Bit sync : [ 0 20ms ] : GPS_MEASUREMENT_STATE_BIT_SYNC is set
* Subframe sync : [ 0 6s ] : GPS_MEASUREMENT_STATE_SUBFRAME_SYNC is set
* TOW decoded : [ 0 1week ] : GPS_MEASUREMENT_STATE_TOW_DECODED is set
*
* However, if there is any ambiguity in integer millisecond,
* GPS_MEASUREMENT_STATE_MSEC_AMBIGUOUS should be set accordingly, in the 'state' field.
*
* This value must be populated if 'state' != GPS_MEASUREMENT_STATE_UNKNOWN.
*/
int64_t received_gps_tow_ns;
/**
* 1-Sigma uncertainty of the Received GPS Time-of-Week in nanoseconds.
*
* This value must be populated if 'state' != GPS_MEASUREMENT_STATE_UNKNOWN.
*/
int64_t received_gps_tow_uncertainty_ns;
/**
* Carrier-to-noise density in dB-Hz, in the range [0, 63].
* It contains the measured C/N0 value for the signal at the antenna input.
*
* This is a Mandatory value.
*/
double c_n0_dbhz;
/**
* Pseudorange rate at the timestamp in m/s.
* The correction of a given Pseudorange Rate value includes corrections for receiver and
* satellite clock frequency errors.
*
* If GPS_MEASUREMENT_HAS_UNCORRECTED_PSEUDORANGE_RATE is set in 'flags' field, this field must
* be populated with the 'uncorrected' reading.
* If GPS_MEASUREMENT_HAS_UNCORRECTED_PSEUDORANGE_RATE is not set in 'flags' field, this field
* must be populated with the 'corrected' reading. This is the default behavior.
*
* It is encouraged to provide the 'uncorrected' 'pseudorange rate', and provide GpsClock's
* 'drift' field as well.
*
* The value includes the 'pseudorange rate uncertainty' in it.
* A positive 'uncorrected' value indicates that the SV is moving away from the receiver.
*
* The sign of the 'uncorrected' 'pseudorange rate' and its relation to the sign of 'doppler
* shift' is given by the equation:
* pseudorange rate = -k * doppler shift (where k is a constant)
*
* This is a Mandatory value.
*/
double pseudorange_rate_mps;
/**
* 1-Sigma uncertainty of the pseudurange rate in m/s.
* The uncertainty is represented as an absolute (single sided) value.
*
* This is a Mandatory value.
*/
double pseudorange_rate_uncertainty_mps;
/**
* Accumulated delta range's state. It indicates whether ADR is reset or there is a cycle slip
* (indicating loss of lock).
*
* This is a Mandatory value.
*/
GpsAccumulatedDeltaRangeState accumulated_delta_range_state;
/**
* Accumulated delta range since the last channel reset in meters.
* A positive value indicates that the SV is moving away from the receiver.
*
* The sign of the 'accumulated delta range' and its relation to the sign of 'carrier phase'
* is given by the equation:
* accumulated delta range = -k * carrier phase (where k is a constant)
*
* This value must be populated if 'accumulated delta range state' != GPS_ADR_STATE_UNKNOWN.
* However, it is expected that the data is only accurate when:
* 'accumulated delta range state' == GPS_ADR_STATE_VALID.
*/
double accumulated_delta_range_m;
/**
* 1-Sigma uncertainty of the accumulated delta range in meters.
* This value must be populated if 'accumulated delta range state' != GPS_ADR_STATE_UNKNOWN.
*/
double accumulated_delta_range_uncertainty_m;
/**
* Best derived Pseudorange by the chip-set, in meters.
* The value contains the 'pseudorange uncertainty' in it.
*
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_PSEUDORANGE.
*/
double pseudorange_m;
/**
* 1-Sigma uncertainty of the pseudorange in meters.
* The value contains the 'pseudorange' and 'clock' uncertainty in it.
* The uncertainty is represented as an absolute (single sided) value.
*
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_PSEUDORANGE_UNCERTAINTY.
*/
double pseudorange_uncertainty_m;
/**
* A fraction of the current C/A code cycle, in the range [0.0, 1023.0]
* This value contains the time (in Chip units) since the last C/A code cycle (GPS Msec epoch).
*
* The reference frequency is given by the field 'carrier_frequency_hz'.
* The value contains the 'code-phase uncertainty' in it.
*
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_CODE_PHASE.
*/
double code_phase_chips;
/**
* 1-Sigma uncertainty of the code-phase, in a fraction of chips.
* The uncertainty is represented as an absolute (single sided) value.
*
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_CODE_PHASE_UNCERTAINTY.
*/
double code_phase_uncertainty_chips;
/**
* Carrier frequency at which codes and messages are modulated, it can be L1 or L2.
* If the field is not set, the carrier frequency is assumed to be L1.
*
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_CARRIER_FREQUENCY.
*/
float carrier_frequency_hz;
/**
* The number of full carrier cycles between the satellite and the receiver.
* The reference frequency is given by the field 'carrier_frequency_hz'.
*
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_CARRIER_CYCLES.
*/
int64_t carrier_cycles;
/**
* The RF phase detected by the receiver, in the range [0.0, 1.0].
* This is usually the fractional part of the complete carrier phase measurement.
*
* The reference frequency is given by the field 'carrier_frequency_hz'.
* The value contains the 'carrier-phase uncertainty' in it.
*
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_CARRIER_PHASE.
*/
double carrier_phase;
/**
* 1-Sigma uncertainty of the carrier-phase.
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_CARRIER_PHASE_UNCERTAINTY.
*/
double carrier_phase_uncertainty;
/**
* An enumeration that indicates the 'loss of lock' state of the event.
*/
GpsLossOfLock loss_of_lock;
/**
* The number of GPS bits transmitted since Sat-Sun midnight (GPS week).
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_BIT_NUMBER.
*/
int32_t bit_number;
/**
* The elapsed time since the last received bit in milliseconds, in the range [0, 20]
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_TIME_FROM_LAST_BIT.
*/
int16_t time_from_last_bit_ms;
/**
* Doppler shift in Hz.
* A positive value indicates that the SV is moving toward the receiver.
*
* The reference frequency is given by the field 'carrier_frequency_hz'.
* The value contains the 'doppler shift uncertainty' in it.
*
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_DOPPLER_SHIFT.
*/
double doppler_shift_hz;
/**
* 1-Sigma uncertainty of the doppler shift in Hz.
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_DOPPLER_SHIFT_UNCERTAINTY.
*/
double doppler_shift_uncertainty_hz;
/**
* An enumeration that indicates the 'multipath' state of the event.
*/
GpsMultipathIndicator multipath_indicator;
/**
* Signal-to-noise ratio in dB.
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_SNR.
*/
double snr_db;
/**
* Elevation in degrees, the valid range is [-90, 90].
* The value contains the 'elevation uncertainty' in it.
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_ELEVATION.
*/
double elevation_deg;
/**
* 1-Sigma uncertainty of the elevation in degrees, the valid range is [0, 90].
* The uncertainty is represented as the absolute (single sided) value.
*
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_ELEVATION_UNCERTAINTY.
*/
double elevation_uncertainty_deg;
/**
* Azimuth in degrees, in the range [0, 360).
* The value contains the 'azimuth uncertainty' in it.
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_AZIMUTH.
* */
double azimuth_deg;
/**
* 1-Sigma uncertainty of the azimuth in degrees, the valid range is [0, 180].
* The uncertainty is represented as an absolute (single sided) value.
*
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_AZIMUTH_UNCERTAINTY.
*/
double azimuth_uncertainty_deg;
/**
* Whether the GPS represented by the measurement was used for computing the most recent fix.
* If the data is available, 'flags' must contain GPS_MEASUREMENT_HAS_USED_IN_FIX.
*/
bool used_in_fix;
} GpsMeasurement;
/** Represents a reading of GPS measurements. */
typedef struct {
/** set to sizeof(GpsData) */
size_t size;
/** Number of measurements. */
size_t measurement_count;
/** The array of measurements. */
GpsMeasurement measurements[GPS_MAX_MEASUREMENT];
/** The GPS clock time reading. */
GpsClock clock;
} GpsData;
/**
* The callback for to report measurements from the HAL.
*
* Parameters:
* data - A data structure containing the measurements.
*/
typedef void (*gps_measurement_callback) (GpsData* data);
typedef struct {
/** set to sizeof(GpsMeasurementCallbacks) */
size_t size;
gps_measurement_callback measurement_callback;
} GpsMeasurementCallbacks;
#define GPS_MEASUREMENT_OPERATION_SUCCESS 0
#define GPS_MEASUREMENT_ERROR_ALREADY_INIT -100
#define GPS_MEASUREMENT_ERROR_GENERIC -101
/**
* Extended interface for GPS Measurements support.
*/
typedef struct {
/** Set to sizeof(GpsMeasurementInterface) */
size_t size;
/**
* Initializes the interface and registers the callback routines with the HAL.
* After a successful call to 'init' the HAL must begin to provide updates at its own phase.
*
* Status:
* GPS_MEASUREMENT_OPERATION_SUCCESS
* GPS_MEASUREMENT_ERROR_ALREADY_INIT - if a callback has already been registered without a
* corresponding call to 'close'
* GPS_MEASUREMENT_ERROR_GENERIC - if any other error occurred, it is expected that the HAL
* will not generate any updates upon returning this error code.
*/
int (*init) (GpsMeasurementCallbacks* callbacks);
/**
* Stops updates from the HAL, and unregisters the callback routines.
* After a call to stop, the previously registered callbacks must be considered invalid by the
* HAL.
* If stop is invoked without a previous 'init', this function should perform no work.
*/
void (*close) ();
} GpsMeasurementInterface;
/** Represents a GPS navigation message (or a fragment of it). */
typedef struct {
/** set to sizeof(GpsNavigationMessage) */
size_t size;
/**
* Pseudo-random number in the range of [1, 32]
* This is a Mandatory value.
*/
int8_t prn;
/**
* The type of message contained in the structure.
* This is a Mandatory value.
*/
GpsNavigationMessageType type;
/**
* The status of the received navigation message.
* No need to send any navigation message that contains words with parity error and cannot be
* corrected.
*/
NavigationMessageStatus status;
/**
* Message identifier.
* It provides an index so the complete Navigation Message can be assembled. i.e. fo L1 C/A
* subframe 4 and 5, this value corresponds to the 'frame id' of the navigation message.
* Subframe 1, 2, 3 does not contain a 'frame id' and this value can be set to -1.
*/
int16_t message_id;
/**
* Sub-message identifier.
* If required by the message 'type', this value contains a sub-index within the current
* message (or frame) that is being transmitted.
* i.e. for L1 C/A the submessage id corresponds to the sub-frame id of the navigation message.
*/
int16_t submessage_id;
/**
* The length of the data (in bytes) contained in the current message.
* If this value is different from zero, 'data' must point to an array of the same size.
* e.g. for L1 C/A the size of the sub-frame will be 40 bytes (10 words, 30 bits/word).
*
* This is a Mandatory value.
*/
size_t data_length;
/**
* The data of the reported GPS message.
* The bytes (or words) specified using big endian format (MSB first).
*
* For L1 C/A, each subframe contains 10 30-bit GPS words. Each GPS word (30 bits) should be
* fitted into the last 30 bits in a 4-byte word (skip B31 and B32), with MSB first.
*/
uint8_t* data;
} GpsNavigationMessage;
/**
* The callback to report an available fragment of a GPS navigation messages from the HAL.
*
* Parameters:
* message - The GPS navigation submessage/subframe representation.
*/
typedef void (*gps_navigation_message_callback) (GpsNavigationMessage* message);
typedef struct {
/** set to sizeof(GpsNavigationMessageCallbacks) */
size_t size;
gps_navigation_message_callback navigation_message_callback;
} GpsNavigationMessageCallbacks;
#define GPS_NAVIGATION_MESSAGE_OPERATION_SUCCESS 0
#define GPS_NAVIGATION_MESSAGE_ERROR_ALREADY_INIT -100
#define GPS_NAVIGATION_MESSAGE_ERROR_GENERIC -101
/**
* Extended interface for GPS navigation message reporting support.
*/
typedef struct {
/** Set to sizeof(GpsNavigationMessageInterface) */
size_t size;
/**
* Initializes the interface and registers the callback routines with the HAL.
* After a successful call to 'init' the HAL must begin to provide updates as they become
* available.
*
* Status:
* GPS_NAVIGATION_MESSAGE_OPERATION_SUCCESS
* GPS_NAVIGATION_MESSAGE_ERROR_ALREADY_INIT - if a callback has already been registered
* without a corresponding call to 'close'.
* GPS_NAVIGATION_MESSAGE_ERROR_GENERIC - if any other error occurred, it is expected that
* the HAL will not generate any updates upon returning this error code.
*/
int (*init) (GpsNavigationMessageCallbacks* callbacks);
/**
* Stops updates from the HAL, and unregisters the callback routines.
* After a call to stop, the previously registered callbacks must be considered invalid by the
* HAL.
* If stop is invoked without a previous 'init', this function should perform no work.
*/
void (*close) ();
} GpsNavigationMessageInterface;
/**
* Interface for passing GNSS configuration contents from platform to HAL.
*/
typedef struct {
/** Set to sizeof(GnssConfigurationInterface) */
size_t size;
/**
* Deliver GNSS configuration contents to HAL.
* Parameters:
* config_data - a pointer to a char array which holds what usually is expected from
file(/etc/gps.conf), i.e., a sequence of UTF8 strings separated by '\n'.
* length - total number of UTF8 characters in configuraiton data.
*
* IMPORTANT:
* GPS HAL should expect this function can be called multiple times. And it may be
* called even when GpsLocationProvider is already constructed and enabled. GPS HAL
* should maintain the existing requests for various callback regardless the change
* in configuration data.
*/
void (*configuration_update) (const char* config_data, int32_t length);
} GnssConfigurationInterface;
__END_DECLS
#endif /* ANDROID_INCLUDE_HARDWARE_GPS_H */
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