/* * 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 #include #include #include #include #include #include __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; /** Represents the status of AGPS. */ typedef struct { /** set to sizeof(AGpsStatus_v1) */ size_t size; AGpsType type; AGpsStatusValue status; } AGpsStatus_v1; /** 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 */