1054 lines
29 KiB
C
1054 lines
29 KiB
C
/******************************************************************************
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* GPS HAL (hardware abstraction layer) for HD2/Leo
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*
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* leo-gps.c
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*
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* Copyright (C) 2006-2009 The Android Open Source Project
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* Copyright (C) 2009-2010 The XDAndroid Project
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* Copyright (C) 2010 dan1j3l @ xda-developers
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* Copyright (C) 2011 tytung @ xda-developers
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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#include <errno.h>
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#include <pthread.h>
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#include <fcntl.h>
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#include <sys/epoll.h>
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#include <math.h>
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#include <time.h>
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#include <sys/time.h>
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#define LOG_TAG "gps_leo"
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#include <cutils/log.h>
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#include <cutils/sockets.h>
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#include <gps.h>
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#define XTRA_BLOCK_SIZE 400
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#define GPS_DEBUG 1
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#if GPS_DEBUG
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# define D(...) LOGD(__VA_ARGS__)
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#else
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# define D(...) ((void)0)
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#endif
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void update_gps_location(GpsLocation *location);
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void update_gps_status(GpsStatusValue value);
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void update_gps_svstatus(GpsSvStatus *svstatus);
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void update_gps_nmea(GpsUtcTime timestamp, const char* nmea, int length);
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/*****************************************************************/
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/*****************************************************************/
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/***** *****/
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/***** N M E A T O K E N I Z E R *****/
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/***** *****/
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/*****************************************************************/
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/*****************************************************************/
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/* this is the state of our connection */
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typedef struct {
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const char* p;
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const char* end;
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} Token;
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#define MAX_NMEA_TOKENS 32
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typedef struct {
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int count;
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Token tokens[ MAX_NMEA_TOKENS ];
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} NmeaTokenizer;
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static int
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nmea_tokenizer_init( NmeaTokenizer* t, const char* p, const char* end )
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{
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int count = 0;
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char* q;
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// the initial '$' is optional
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if (p < end && p[0] == '$')
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p += 1;
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// remove trailing newline
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if (end > p && end[-1] == '\n') {
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end -= 1;
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if (end > p && end[-1] == '\r')
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end -= 1;
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}
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// get rid of checksum at the end of the sentecne
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if (end >= p+3 && end[-3] == '*') {
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end -= 3;
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}
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while (p < end) {
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const char* q = p;
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q = memchr(p, ',', end-p);
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if (q == NULL)
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q = end;
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if (count < MAX_NMEA_TOKENS) {
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t->tokens[count].p = p;
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t->tokens[count].end = q;
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count += 1;
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}
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if (q < end)
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q += 1;
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p = q;
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}
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t->count = count;
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return count;
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}
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static Token
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nmea_tokenizer_get( NmeaTokenizer* t, int index )
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{
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Token tok;
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static const char* dummy = "";
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if (index < 0 || index >= t->count) {
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tok.p = tok.end = dummy;
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} else
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tok = t->tokens[index];
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return tok;
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}
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static int
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str2int( const char* p, const char* end )
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{
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int result = 0;
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int len = end - p;
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for ( ; len > 0; len--, p++ )
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{
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int c;
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if (p >= end)
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goto Fail;
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c = *p - '0';
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if ((unsigned)c >= 10)
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goto Fail;
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result = result*10 + c;
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}
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return result;
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Fail:
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return -1;
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}
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static double
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str2float( const char* p, const char* end )
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{
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int result = 0;
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int len = end - p;
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char temp[16];
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if (len >= (int)sizeof(temp))
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return 0.;
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memcpy( temp, p, len );
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temp[len] = 0;
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return strtod( temp, NULL );
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}
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/*****************************************************************/
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/*****************************************************************/
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/***** *****/
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/***** N M E A P A R S E R *****/
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/***** *****/
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/*****************************************************************/
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/*****************************************************************/
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#define NMEA_MAX_SIZE 255
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typedef struct {
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int pos;
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int overflow;
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int utc_year;
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int utc_mon;
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int utc_day;
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int utc_diff;
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GpsLocation fix;
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GpsSvStatus sv_status;
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char in[ NMEA_MAX_SIZE+1 ];
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} NmeaReader;
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typedef struct {
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int init;
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int fd;
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GpsCallbacks callbacks;
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GpsXtraCallbacks xtra_callbacks;
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AGpsCallbacks agps_callbacks;
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GpsStatus status;
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pthread_t thread;
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int control[2];
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} GpsState;
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static GpsState _gps_state[1];
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static void
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nmea_reader_update_utc_diff( NmeaReader* r )
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{
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time_t now = time(NULL);
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struct tm tm_local;
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struct tm tm_utc;
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long time_local, time_utc;
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gmtime_r( &now, &tm_utc );
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localtime_r( &now, &tm_local );
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time_local = tm_local.tm_sec +
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60*(tm_local.tm_min +
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60*(tm_local.tm_hour +
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24*(tm_local.tm_yday +
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365*tm_local.tm_year)));
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time_utc = tm_utc.tm_sec +
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60*(tm_utc.tm_min +
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60*(tm_utc.tm_hour +
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24*(tm_utc.tm_yday +
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365*tm_utc.tm_year)));
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r->utc_diff = time_utc - time_local;
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D("%s() is called. utc_diff = %d", __FUNCTION__, r->utc_diff);
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}
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static void
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nmea_reader_init( NmeaReader* r )
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{
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D("%s() is called", __FUNCTION__);
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memset( r, 0, sizeof(*r) );
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r->pos = 0;
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r->overflow = 0;
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r->utc_year = -1;
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r->utc_mon = -1;
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r->utc_day = -1;
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nmea_reader_update_utc_diff( r );
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}
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static int
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nmea_reader_update_time( NmeaReader* r, Token tok )
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{
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int hour, minute;
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double seconds;
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struct tm tm;
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time_t fix_time;
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if (tok.p + 6 > tok.end)
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return -1;
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if (r->utc_year < 0) {
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// no date yet, get current one
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time_t now = time(NULL);
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gmtime_r( &now, &tm );
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r->utc_year = tm.tm_year + 1900;
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r->utc_mon = tm.tm_mon + 1;
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r->utc_day = tm.tm_mday;
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}
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hour = str2int(tok.p, tok.p+2);
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minute = str2int(tok.p+2, tok.p+4);
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seconds = str2float(tok.p+4, tok.end);
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tm.tm_hour = hour;
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tm.tm_min = minute;
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tm.tm_sec = (int) seconds;
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tm.tm_year = r->utc_year - 1900;
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tm.tm_mon = r->utc_mon - 1;
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tm.tm_mday = r->utc_day;
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tm.tm_isdst = -1;
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fix_time = mktime( &tm ) + r->utc_diff;
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r->fix.timestamp = (long long)fix_time * 1000+(int)(seconds*1000)%1000;
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return 0;
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}
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static int
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nmea_reader_update_date( NmeaReader* r, Token date, Token time )
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{
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Token tok = date;
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int day, mon, year;
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if (tok.p + 6 != tok.end) {
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D("date not properly formatted: '%.*s'", tok.end-tok.p, tok.p);
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return -1;
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}
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day = str2int(tok.p, tok.p+2);
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mon = str2int(tok.p+2, tok.p+4);
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year = str2int(tok.p+4, tok.p+6) + 2000;
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if ((day|mon|year) < 0) {
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D("date not properly formatted: '%.*s'", tok.end-tok.p, tok.p);
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return -1;
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}
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r->utc_year = year;
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r->utc_mon = mon;
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r->utc_day = day;
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return nmea_reader_update_time( r, time );
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}
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static double
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convert_from_hhmm( Token tok )
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{
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double val = str2float(tok.p, tok.end);
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int degrees = (int)(floor(val) / 100);
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double minutes = val - degrees*100.;
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double dcoord = degrees + minutes / 60.0;
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return dcoord;
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}
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static int
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nmea_reader_update_latlong( NmeaReader* r,
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Token latitude,
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char latitudeHemi,
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Token longitude,
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char longitudeHemi )
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{
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double lat, lon;
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Token tok;
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tok = latitude;
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if (tok.p + 6 > tok.end) {
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D("latitude is too short: '%.*s'", tok.end-tok.p, tok.p);
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return -1;
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}
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lat = convert_from_hhmm(tok);
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if (latitudeHemi == 'S')
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lat = -lat;
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tok = longitude;
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if (tok.p + 6 > tok.end) {
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D("longitude is too short: '%.*s'", tok.end-tok.p, tok.p);
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return -1;
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}
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lon = convert_from_hhmm(tok);
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if (longitudeHemi == 'W')
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lon = -lon;
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r->fix.flags |= GPS_LOCATION_HAS_LAT_LONG;
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r->fix.latitude = lat;
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r->fix.longitude = lon;
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return 0;
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}
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static int
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nmea_reader_update_altitude( NmeaReader* r,
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Token altitude,
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Token units )
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{
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Token tok = altitude;
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if (tok.p >= tok.end)
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return -1;
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r->fix.flags |= GPS_LOCATION_HAS_ALTITUDE;
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r->fix.altitude = str2float(tok.p, tok.end);
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return 0;
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}
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static int
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nmea_reader_update_bearing( NmeaReader* r,
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Token bearing )
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{
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Token tok = bearing;
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if (tok.p >= tok.end)
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return -1;
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r->fix.flags |= GPS_LOCATION_HAS_BEARING;
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r->fix.bearing = str2float(tok.p, tok.end);
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return 0;
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}
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static int
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nmea_reader_update_speed( NmeaReader* r,
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Token speed )
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{
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Token tok = speed;
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if (tok.p >= tok.end)
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return -1;
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r->fix.flags |= GPS_LOCATION_HAS_SPEED;
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r->fix.speed = str2float(tok.p, tok.end);
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return 0;
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}
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static void
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nmea_reader_parse( NmeaReader* r )
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{
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/* we received a complete sentence, now parse it to generate
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* a new GPS fix...
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*/
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NmeaTokenizer tzer[1];
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Token tok;
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int i;
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D("Received: '%.*s'", r->pos, r->in);
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if (r->pos < 9) {
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D("Too short. discarded.");
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return;
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}
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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update_gps_nmea(tv.tv_sec*1000+tv.tv_usec/1000, r->in, r->pos);
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}
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nmea_tokenizer_init(tzer, r->in, r->in + r->pos);
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/*
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#if GPS_DEBUG
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{
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int n;
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D("Found %d tokens", tzer->count);
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for (n = 0; n < tzer->count; n++) {
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Token tok = nmea_tokenizer_get(tzer,n);
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D("size of %2d: '%d', ptr=%x", n, tok.end-tok.p, tok.p);
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D("%2d: '%.*s'", n, tok.end-tok.p, tok.p);
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}
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}
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#endif
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*/
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tok = nmea_tokenizer_get(tzer, 0);
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if (tok.p + 5 > tok.end) {
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D("sentence id '%.*s' too short, ignored.", tok.end-tok.p, tok.p);
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return;
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}
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// ignore first two characters.
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tok.p += 2;
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if ( !memcmp(tok.p, "GGA", 3) ) {
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// GPS fix
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Token tok_time = nmea_tokenizer_get(tzer,1);
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Token tok_latitude = nmea_tokenizer_get(tzer,2);
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Token tok_latitudeHemi = nmea_tokenizer_get(tzer,3);
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Token tok_longitude = nmea_tokenizer_get(tzer,4);
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Token tok_longitudeHemi = nmea_tokenizer_get(tzer,5);
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Token tok_altitude = nmea_tokenizer_get(tzer,9);
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Token tok_altitudeUnits = nmea_tokenizer_get(tzer,10);
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nmea_reader_update_time(r, tok_time);
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nmea_reader_update_latlong(r, tok_latitude,
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tok_latitudeHemi.p[0],
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tok_longitude,
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tok_longitudeHemi.p[0]);
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nmea_reader_update_altitude(r, tok_altitude, tok_altitudeUnits);
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} else if ( !memcmp(tok.p, "GSA", 3) ) {
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//Satellites are handled by RPC-side code.
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} else if ( !memcmp(tok.p, "GSV", 3) ) {
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//Satellites are handled by RPC-side code.
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} else if ( !memcmp(tok.p, "RMC", 3) ) {
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Token tok_time = nmea_tokenizer_get(tzer,1);
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Token tok_fixStatus = nmea_tokenizer_get(tzer,2);
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Token tok_latitude = nmea_tokenizer_get(tzer,3);
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Token tok_latitudeHemi = nmea_tokenizer_get(tzer,4);
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Token tok_longitude = nmea_tokenizer_get(tzer,5);
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Token tok_longitudeHemi = nmea_tokenizer_get(tzer,6);
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Token tok_speed = nmea_tokenizer_get(tzer,7);
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Token tok_bearing = nmea_tokenizer_get(tzer,8);
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Token tok_date = nmea_tokenizer_get(tzer,9);
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D("in RMC, fixStatus=%c", tok_fixStatus.p[0]);
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if (tok_fixStatus.p[0] == 'A')
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{
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nmea_reader_update_date( r, tok_date, tok_time );
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nmea_reader_update_latlong( r, tok_latitude,
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tok_latitudeHemi.p[0],
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tok_longitude,
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tok_longitudeHemi.p[0] );
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nmea_reader_update_bearing( r, tok_bearing );
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nmea_reader_update_speed ( r, tok_speed );
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}
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} else {
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tok.p -= 2;
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D("unknown sentence '%.*s", tok.end-tok.p, tok.p);
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}
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if (r->fix.flags != 0) {
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#if GPS_DEBUG
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char temp[256];
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char* p = temp;
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char* end = p + sizeof(temp);
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struct tm utc;
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p += snprintf( p, end-p, "sending fix" );
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if (r->fix.flags & GPS_LOCATION_HAS_LAT_LONG) {
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p += snprintf(p, end-p, " lat=%g lon=%g", r->fix.latitude, r->fix.longitude);
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}
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if (r->fix.flags & GPS_LOCATION_HAS_ALTITUDE) {
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p += snprintf(p, end-p, " altitude=%g", r->fix.altitude);
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}
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if (r->fix.flags & GPS_LOCATION_HAS_SPEED) {
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p += snprintf(p, end-p, " speed=%g", r->fix.speed);
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}
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if (r->fix.flags & GPS_LOCATION_HAS_BEARING) {
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p += snprintf(p, end-p, " bearing=%g", r->fix.bearing);
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}
|
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if (r->fix.flags & GPS_LOCATION_HAS_ACCURACY) {
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p += snprintf(p,end-p, " accuracy=%g", r->fix.accuracy);
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}
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gmtime_r( (time_t*) &r->fix.timestamp, &utc );
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p += snprintf(p, end-p, " time=%s", asctime( &utc ) );
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D("%s", temp);
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#endif
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if (_gps_state->callbacks.location_cb) {
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_gps_state->callbacks.location_cb( &r->fix );
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r->fix.flags = 0;
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}
|
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else {
|
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D("no callback, keeping data until needed !");
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}
|
|
}
|
|
}
|
|
|
|
static void
|
|
nmea_reader_addc( NmeaReader* r, int c )
|
|
{
|
|
if (r->overflow) {
|
|
r->overflow = (c != '\n');
|
|
return;
|
|
}
|
|
|
|
if (r->pos >= (int) sizeof(r->in)-1 ) {
|
|
r->overflow = 1;
|
|
r->pos = 0;
|
|
return;
|
|
}
|
|
|
|
r->in[r->pos] = (char)c;
|
|
r->pos += 1;
|
|
|
|
if (c == '\n') {
|
|
nmea_reader_parse( r );
|
|
r->pos = 0;
|
|
}
|
|
}
|
|
|
|
/*****************************************************************/
|
|
/*****************************************************************/
|
|
/***** *****/
|
|
/***** C O N N E C T I O N S T A T E *****/
|
|
/***** *****/
|
|
/*****************************************************************/
|
|
/*****************************************************************/
|
|
|
|
/* commands sent to the gps thread */
|
|
enum {
|
|
CMD_QUIT = 0,
|
|
CMD_START = 1,
|
|
CMD_STOP = 2
|
|
};
|
|
|
|
static void gps_state_done( GpsState* s ) {
|
|
|
|
update_gps_status(GPS_STATUS_ENGINE_OFF);
|
|
|
|
// tell the thread to quit, and wait for it
|
|
char cmd = CMD_QUIT;
|
|
void* dummy;
|
|
write( s->control[0], &cmd, 1 );
|
|
pthread_join(s->thread, &dummy);
|
|
|
|
// close the control socket pair
|
|
close( s->control[0] ); s->control[0] = -1;
|
|
close( s->control[1] ); s->control[1] = -1;
|
|
|
|
// close connection to the GPS daemon
|
|
close( s->fd ); s->fd = -1;
|
|
s->init = 0;
|
|
}
|
|
|
|
static void gps_state_start( GpsState* s ) {
|
|
//Navigation started.
|
|
update_gps_status(GPS_STATUS_SESSION_BEGIN);
|
|
|
|
char cmd = CMD_START;
|
|
int ret;
|
|
|
|
do { ret=write( s->control[0], &cmd, 1 ); }
|
|
while (ret < 0 && errno == EINTR);
|
|
|
|
if (ret != 1)
|
|
D("%s: could not send CMD_START command: ret=%d: %s",
|
|
__FUNCTION__, ret, strerror(errno));
|
|
}
|
|
|
|
static void gps_state_stop( GpsState* s ) {
|
|
//Navigation ended (times out circa 10seconds ater last get_pos)
|
|
update_gps_status(GPS_STATUS_SESSION_END);
|
|
|
|
char cmd = CMD_STOP;
|
|
int ret;
|
|
|
|
do { ret=write( s->control[0], &cmd, 1 ); }
|
|
while (ret < 0 && errno == EINTR);
|
|
|
|
if (ret != 1)
|
|
D("%s: could not send CMD_STOP command: ret=%d: %s",
|
|
__FUNCTION__, ret, strerror(errno));
|
|
}
|
|
|
|
static int epoll_register( int epoll_fd, int fd ) {
|
|
struct epoll_event ev;
|
|
int ret, flags;
|
|
|
|
/* important: make the fd non-blocking */
|
|
flags = fcntl(fd, F_GETFL);
|
|
fcntl(fd, F_SETFL, flags | O_NONBLOCK);
|
|
|
|
ev.events = EPOLLIN;
|
|
ev.data.fd = fd;
|
|
do {
|
|
ret = epoll_ctl( epoll_fd, EPOLL_CTL_ADD, fd, &ev );
|
|
} while (ret < 0 && errno == EINTR);
|
|
return ret;
|
|
}
|
|
|
|
static int epoll_deregister( int epoll_fd, int fd ) {
|
|
int ret;
|
|
do {
|
|
ret = epoll_ctl( epoll_fd, EPOLL_CTL_DEL, fd, NULL );
|
|
} while (ret < 0 && errno == EINTR);
|
|
return ret;
|
|
}
|
|
|
|
void update_gps_location(GpsLocation *location) {
|
|
GpsState* state = _gps_state;
|
|
//Should be made thread safe...
|
|
if(state->callbacks.location_cb)
|
|
state->callbacks.location_cb(location);
|
|
}
|
|
|
|
void update_gps_status(GpsStatusValue value) {
|
|
D("%s(): GpsStatusValue=%d", __FUNCTION__, value);
|
|
GpsState* state = _gps_state;
|
|
//Should be made thread safe...
|
|
state->status.status=value;
|
|
if(state->callbacks.status_cb)
|
|
state->callbacks.status_cb(&state->status);
|
|
}
|
|
|
|
void update_gps_svstatus(GpsSvStatus *svstatus) {
|
|
D("%s(): GpsSvStatus.num_svs=%d", __FUNCTION__, svstatus->num_svs);
|
|
GpsState* state = _gps_state;
|
|
//Should be made thread safe...
|
|
if(state->callbacks.sv_status_cb)
|
|
state->callbacks.sv_status_cb(svstatus);
|
|
}
|
|
|
|
void update_gps_nmea(GpsUtcTime timestamp, const char* nmea, int length) {
|
|
D("%s() is called", __FUNCTION__);
|
|
GpsState* state = _gps_state;
|
|
//Should be made thread safe...
|
|
if(state->callbacks.nmea_cb)
|
|
state->callbacks.nmea_cb(timestamp, nmea, length);
|
|
}
|
|
|
|
/* this is the main thread, it waits for commands from gps_state_start/stop and,
|
|
* when started, messages from the NMEA SMD. these are simple NMEA sentences
|
|
* that must be parsed to be converted into GPS fixes sent to the framework
|
|
*/
|
|
int32_t _fix_frequency;//Which is a period not a frequency, but nvm.
|
|
|
|
static void* gps_state_thread( void* arg ) {
|
|
GpsState* state = (GpsState*) arg;
|
|
NmeaReader reader[1];
|
|
int epoll_fd = epoll_create(2);
|
|
int started = 0;
|
|
int gps_fd = state->fd;
|
|
int control_fd = state->control[1];
|
|
|
|
nmea_reader_init( reader );
|
|
|
|
// register control file descriptors for polling
|
|
epoll_register( epoll_fd, control_fd );
|
|
if (gps_fd > -1) {
|
|
epoll_register( epoll_fd, gps_fd );
|
|
}
|
|
|
|
D("gps thread running");
|
|
|
|
// now loop
|
|
for (;;) {
|
|
struct epoll_event events[2];
|
|
int ne, nevents;
|
|
|
|
nevents = epoll_wait( epoll_fd, events, gps_fd>-1 ? 2 : 1, started ? _fix_frequency*1000 : -1);
|
|
if (nevents < 0) {
|
|
if (errno != EINTR)
|
|
LOGE("epoll_wait() unexpected error: %s", strerror(errno));
|
|
continue;
|
|
}
|
|
//D("gps thread received %d events", nevents);
|
|
if(nevents==0) {
|
|
//We should call pdsm_get_position more often than that... but it's not easy to code.
|
|
//Anyway the 2second timeout is already stupid,
|
|
if(started)
|
|
gps_get_position();
|
|
}
|
|
for (ne = 0; ne < nevents; ne++) {
|
|
if ((events[ne].events & (EPOLLERR|EPOLLHUP)) != 0) {
|
|
LOGE("EPOLLERR or EPOLLHUP after epoll_wait() !?");
|
|
goto Exit;
|
|
}
|
|
if ((events[ne].events & EPOLLIN) != 0) {
|
|
int fd = events[ne].data.fd;
|
|
|
|
if (fd == control_fd) {
|
|
char cmd = 255;
|
|
int ret;
|
|
D("gps control fd event");
|
|
do {
|
|
ret = read( fd, &cmd, 1 );
|
|
} while (ret < 0 && errno == EINTR);
|
|
|
|
if (cmd == CMD_QUIT) {
|
|
D("gps thread quitting on demand");
|
|
goto Exit;
|
|
} else if (cmd == CMD_START) {
|
|
if (!started) {
|
|
D("gps thread starting location_cb=%p", state->callbacks.location_cb);
|
|
started = 1;
|
|
}
|
|
} else if (cmd == CMD_STOP) {
|
|
if (started) {
|
|
D("gps thread stopping");
|
|
started = 0;
|
|
exit_gps_rpc();
|
|
}
|
|
}
|
|
} else if (fd == gps_fd) {
|
|
char buff[32];
|
|
D("gps fd event");
|
|
for (;;) {
|
|
int nn, ret;
|
|
|
|
ret = read( fd, buff, sizeof(buff) );
|
|
if (ret < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
if (errno != EWOULDBLOCK)
|
|
LOGE("error while reading from gps daemon socket: %s:", strerror(errno));
|
|
break;
|
|
}
|
|
//D("received %d bytes: %.*s", ret, ret, buff);
|
|
for (nn = 0; nn < ret; nn++)
|
|
nmea_reader_addc( reader, buff[nn] );
|
|
}
|
|
D("gps fd event end");
|
|
} else {
|
|
LOGE("epoll_wait() returned unkown fd %d ?", fd);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
Exit:
|
|
return NULL;
|
|
}
|
|
|
|
static void gps_state_init( GpsState* state ) {
|
|
|
|
update_gps_status(GPS_STATUS_ENGINE_ON);
|
|
|
|
state->init = 1;
|
|
state->control[0] = -1;
|
|
state->control[1] = -1;
|
|
state->fd = -1; // open("/dev/smd27", O_RDONLY );
|
|
|
|
if ( socketpair( AF_LOCAL, SOCK_STREAM, 0, state->control ) < 0 ) {
|
|
LOGE("could not create thread control socket pair: %s", strerror(errno));
|
|
goto Fail;
|
|
}
|
|
|
|
if ( pthread_create( &state->thread, NULL, gps_state_thread, state ) != 0 ) {
|
|
LOGE("could not create gps thread: %s", strerror(errno));
|
|
goto Fail;
|
|
}
|
|
|
|
if(init_gps_rpc())
|
|
goto Fail;
|
|
|
|
D("gps state initialized");
|
|
return;
|
|
|
|
Fail:
|
|
gps_state_done( state );
|
|
}
|
|
|
|
/*****************************************************************/
|
|
/*****************************************************************/
|
|
/***** *****/
|
|
/***** I N T E R F A C E *****/
|
|
/***** *****/
|
|
/*****************************************************************/
|
|
/*****************************************************************/
|
|
|
|
/***** GpsXtraInterface *****/
|
|
|
|
static int gps_xtra_init(GpsXtraCallbacks* callbacks) {
|
|
D("%s() is called", __FUNCTION__);
|
|
GpsState* s = _gps_state;
|
|
|
|
s->xtra_callbacks = *callbacks;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gps_xtra_inject_xtra_data(char* data, int length) {
|
|
D("%s() is called", __FUNCTION__);
|
|
D("gps_xtra_inject_xtra_data: xtra size = %d, data ptr = 0x%x\n", length, (int) data);
|
|
GpsState* s = _gps_state;
|
|
if (!s->init)
|
|
return 0;
|
|
|
|
int rpc_ret_val = -1;
|
|
int ret_val = -1;
|
|
unsigned char *xtra_data_ptr;
|
|
uint32_t part_len;
|
|
uint8_t part;
|
|
uint8_t total_parts;
|
|
uint16_t len_injected;
|
|
|
|
total_parts = (length / XTRA_BLOCK_SIZE);
|
|
if ((total_parts % XTRA_BLOCK_SIZE) != 0)
|
|
{
|
|
total_parts += 1;
|
|
}
|
|
|
|
len_injected = 0; // O bytes injected
|
|
// XTRA injection starts with part 1
|
|
for (part = 1; part <= total_parts; part++)
|
|
{
|
|
part_len = XTRA_BLOCK_SIZE;
|
|
if (XTRA_BLOCK_SIZE > (length - len_injected))
|
|
{
|
|
part_len = length - len_injected;
|
|
}
|
|
xtra_data_ptr = data + len_injected;
|
|
|
|
D("gps_xtra_inject_xtra_data: inject part = %d/%d, len = %d\n", part, total_parts, part_len);
|
|
|
|
if (part < total_parts)
|
|
{
|
|
rpc_ret_val = gps_xtra_set_data(xtra_data_ptr, part_len, part, total_parts);
|
|
if (!rpc_ret_val)
|
|
{
|
|
D("gps_xtra_set_data() for xtra returned %d \n", rpc_ret_val);
|
|
ret_val = EINVAL; // return error
|
|
break;
|
|
}
|
|
}
|
|
else // part == total_parts
|
|
{
|
|
ret_val = gps_xtra_set_data(xtra_data_ptr, part_len, part, total_parts);
|
|
break; // done with injection
|
|
}
|
|
|
|
len_injected += part_len;
|
|
}
|
|
|
|
return ret_val;
|
|
}
|
|
|
|
static const GpsXtraInterface sGpsXtraInterface = {
|
|
gps_xtra_init,
|
|
gps_xtra_inject_xtra_data,
|
|
};
|
|
|
|
/***** AGpsInterface *****/
|
|
|
|
static void agps_init(AGpsCallbacks* callbacks) {
|
|
D("%s() is called", __FUNCTION__);
|
|
GpsState* s = _gps_state;
|
|
|
|
s->agps_callbacks = *callbacks;
|
|
}
|
|
|
|
static int agps_data_conn_open(const char* apn) {
|
|
D("%s() is called", __FUNCTION__);
|
|
D("apn=%s", apn);
|
|
/* not yet implemented */
|
|
return 0;
|
|
}
|
|
|
|
static int agps_data_conn_closed() {
|
|
D("%s() is called", __FUNCTION__);
|
|
/* not yet implemented */
|
|
return 0;
|
|
}
|
|
|
|
static int agps_data_conn_failed() {
|
|
D("%s() is called", __FUNCTION__);
|
|
/* not yet implemented */
|
|
return 0;
|
|
}
|
|
|
|
static int agps_set_server(AGpsType type, const char* hostname, int port) {
|
|
D("%s() is called", __FUNCTION__);
|
|
D("type=%d, hostname=%s, port=%d", type, hostname, port);
|
|
/* not yet implemented */
|
|
return 0;
|
|
}
|
|
|
|
static const AGpsInterface sAGpsInterface = {
|
|
agps_init,
|
|
agps_data_conn_open,
|
|
agps_data_conn_closed,
|
|
agps_data_conn_failed,
|
|
agps_set_server,
|
|
};
|
|
|
|
/***** GpsInterface *****/
|
|
|
|
// fully shutting down the GPS is temporarily disabled
|
|
#define DISABLE_CLEANUP 1
|
|
|
|
static int gps_init(GpsCallbacks* callbacks) {
|
|
D("%s() is called", __FUNCTION__);
|
|
GpsState* s = _gps_state;
|
|
|
|
if (!s->init)
|
|
gps_state_init(s);
|
|
|
|
s->callbacks = *callbacks;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void gps_cleanup() {
|
|
D("%s() is called", __FUNCTION__);
|
|
#if DISABLE_CLEANUP
|
|
return;
|
|
#else
|
|
GpsState* s = _gps_state;
|
|
|
|
if (s->init)
|
|
gps_state_done(s);
|
|
#endif
|
|
}
|
|
|
|
static int gps_start() {
|
|
D("%s: called", __FUNCTION__);
|
|
|
|
GpsState* s = _gps_state;
|
|
|
|
if (!s->init) {
|
|
D("%s: called with uninitialized state !!", __FUNCTION__);
|
|
return -1;
|
|
}
|
|
|
|
gps_state_start(s);
|
|
return 0;
|
|
}
|
|
|
|
static int gps_stop() {
|
|
D("%s: called", __FUNCTION__);
|
|
|
|
GpsState* s = _gps_state;
|
|
|
|
if (!s->init) {
|
|
D("%s: called with uninitialized state !!", __FUNCTION__);
|
|
return -1;
|
|
}
|
|
|
|
gps_state_stop(s);
|
|
return 0;
|
|
}
|
|
|
|
static int gps_inject_time(GpsUtcTime time, int64_t timeReference, int uncertainty) {
|
|
D("%s() is called", __FUNCTION__);
|
|
D("time=%lld, timeReference=%lld, uncertainty=%d", time, timeReference, uncertainty);
|
|
GpsState* s = _gps_state;
|
|
if (!s->init)
|
|
return 0;
|
|
|
|
int ret_val = -1;
|
|
ret_val = gps_xtra_inject_time_info(time, timeReference, uncertainty);
|
|
return ret_val;
|
|
}
|
|
|
|
static int gps_inject_location(double latitude, double longitude, float accuracy) {
|
|
D("%s() is called", __FUNCTION__);
|
|
D("latitude=%f, longitude=%f, accuracy=%f", latitude, longitude, accuracy);
|
|
/* not yet implemented */
|
|
return 0;
|
|
}
|
|
|
|
static void gps_delete_aiding_data(GpsAidingData flags) {
|
|
D("%s() is called", __FUNCTION__);
|
|
D("flags=%d", flags);
|
|
/* not yet implemented */
|
|
}
|
|
|
|
static int gps_set_position_mode(GpsPositionMode mode, int fix_frequency) {
|
|
_fix_frequency=fix_frequency;
|
|
if(_fix_frequency==0) {
|
|
//We don't handle single shot requests atm...
|
|
//So one every 1 seconds will it be.
|
|
_fix_frequency=1;
|
|
}
|
|
if(_fix_frequency>8) {
|
|
//Ok, A9 will timeout with so high value.
|
|
//Set it to 8.
|
|
_fix_frequency=8;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const void* gps_get_extension(const char* name) {
|
|
D("%s('%s') is called", __FUNCTION__, name);
|
|
if (!strcmp(name, GPS_XTRA_INTERFACE)) {
|
|
return &sGpsXtraInterface;
|
|
} else if (!strcmp(name, AGPS_INTERFACE)) {
|
|
return &sAGpsInterface;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static const GpsInterface hardwareGpsInterface = {
|
|
gps_init,
|
|
gps_start,
|
|
gps_stop,
|
|
gps_cleanup,
|
|
gps_inject_time,
|
|
gps_inject_location,
|
|
gps_delete_aiding_data,
|
|
gps_set_position_mode,
|
|
gps_get_extension,
|
|
};
|
|
|
|
const GpsInterface* gps_get_hardware_interface()
|
|
{
|
|
D("%s() is called", __FUNCTION__);
|
|
return &hardwareGpsInterface;
|
|
}
|
|
|
|
// END OF FILE
|