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Diffstat (limited to 'include')
| -rw-r--r-- | include/hardware/gps.h | 1884 |
1 files changed, 1884 insertions, 0 deletions
diff --git a/include/hardware/gps.h b/include/hardware/gps.h new file mode 100644 index 0000000..361e811 --- /dev/null +++ b/include/hardware/gps.h @@ -0,0 +1,1884 @@ +/* + * 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" + +/** + * The GPS chipset can use Psc for AGPS. + */ +#define AGPS_USE_PSC + +/** + * 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; + /** Unknown field in Samsung I9100 libgps + May be an indicator for constellation type + (GPS, GLONASS, Galileo)? + Used on GT-I9100, likely also present on GT-N7000, + SGH-I717, SGH-I727 but this needs confirmation. + */ + int unknown_samsung_field; +} 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; +#ifdef AGPS_USE_PSC + uint16_t psc; +#endif + 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 */ |