1 /* 2 * refclock_tpro - clock driver for the KSI/Odetics TPRO-S IRIG-B reader 3 */ 4 5 #ifdef HAVE_CONFIG_H 6 #include <config.h> 7 #endif 8 9 #if defined(REFCLOCK) && defined(CLOCK_TPRO) 10 11 #include "ntpd.h" 12 #include "ntp_io.h" 13 #include "ntp_refclock.h" 14 #include "ntp_unixtime.h" 15 #include "sys/tpro.h" 16 #include "ntp_stdlib.h" 17 18 #include <stdio.h> 19 #include <ctype.h> 20 21 /* 22 * This driver supports the KSI/Odetecs TPRO-S IRIG-B reader and TPRO- 23 * SAT GPS receiver for the Sun Microsystems SBus. It requires that the 24 * tpro.o device driver be installed and loaded. 25 */ 26 27 /* 28 * TPRO interface definitions 29 */ 30 #define DEVICE "/dev/tpro%d" /* device name and unit */ 31 #define PRECISION (-20) /* precision assumed (1 us) */ 32 #define REFID "IRIG" /* reference ID */ 33 #define DESCRIPTION "KSI/Odetics TPRO/S IRIG Interface" /* WRU */ 34 35 /* 36 * Unit control structure 37 */ 38 struct tprounit { 39 struct tproval tprodata; /* data returned from tpro read */ 40 }; 41 42 /* 43 * Function prototypes 44 */ 45 static int tpro_start P((int, struct peer *)); 46 static void tpro_shutdown P((int, struct peer *)); 47 static void tpro_poll P((int unit, struct peer *)); 48 49 /* 50 * Transfer vector 51 */ 52 struct refclock refclock_tpro = { 53 tpro_start, /* start up driver */ 54 tpro_shutdown, /* shut down driver */ 55 tpro_poll, /* transmit poll message */ 56 noentry, /* not used (old tpro_control) */ 57 noentry, /* initialize driver (not used) */ 58 noentry, /* not used (old tpro_buginfo) */ 59 NOFLAGS /* not used */ 60 }; 61 62 63 /* 64 * tpro_start - open the TPRO device and initialize data for processing 65 */ 66 static int 67 tpro_start( 68 int unit, 69 struct peer *peer 70 ) 71 { 72 register struct tprounit *up; 73 struct refclockproc *pp; 74 char device[20]; 75 int fd; 76 77 /* 78 * Open TPRO device 79 */ 80 (void)sprintf(device, DEVICE, unit); 81 fd = open(device, O_RDONLY | O_NDELAY, 0777); 82 if (fd == -1) { 83 msyslog(LOG_ERR, "tpro_start: open of %s: %m", device); 84 return (0); 85 } 86 87 /* 88 * Allocate and initialize unit structure 89 */ 90 if (!(up = (struct tprounit *) emalloc(sizeof(struct tprounit)))) { 91 (void) close(fd); 92 return (0); 93 } 94 memset((char *)up, 0, sizeof(struct tprounit)); 95 pp = peer->procptr; 96 pp->io.clock_recv = noentry; 97 pp->io.srcclock = (caddr_t)peer; 98 pp->io.datalen = 0; 99 pp->io.fd = fd; 100 pp->unitptr = (caddr_t)up; 101 102 /* 103 * Initialize miscellaneous peer variables 104 */ 105 peer->precision = PRECISION; 106 peer->burst = NSTAGE; 107 pp->clockdesc = DESCRIPTION; 108 memcpy((char *)&pp->refid, REFID, 4); 109 return (1); 110 } 111 112 113 /* 114 * tpro_shutdown - shut down the clock 115 */ 116 static void 117 tpro_shutdown( 118 int unit, 119 struct peer *peer 120 ) 121 { 122 register struct tprounit *up; 123 struct refclockproc *pp; 124 125 pp = peer->procptr; 126 up = (struct tprounit *)pp->unitptr; 127 io_closeclock(&pp->io); 128 free(up); 129 } 130 131 132 /* 133 * tpro_poll - called by the transmit procedure 134 */ 135 static void 136 tpro_poll( 137 int unit, 138 struct peer *peer 139 ) 140 { 141 register struct tprounit *up; 142 struct refclockproc *pp; 143 struct tproval *tp; 144 145 /* 146 * This is the main routine. It snatches the time from the TPRO 147 * board and tacks on a local timestamp. 148 */ 149 pp = peer->procptr; 150 up = (struct tprounit *)pp->unitptr; 151 152 tp = &up->tprodata; 153 if (read(pp->io.fd, (char *)tp, sizeof(struct tproval)) < 0) { 154 refclock_report(peer, CEVNT_FAULT); 155 return; 156 } 157 get_systime(&pp->lastrec); 158 pp->polls++; 159 160 /* 161 * We get down to business, check the timecode format and decode 162 * its contents. If the timecode has invalid length or is not in 163 * proper format, we declare bad format and exit. Note: we 164 * can't use the sec/usec conversion produced by the driver, 165 * since the year may be suspect. All format error checking is 166 * done by the sprintf() and sscanf() routines. 167 * 168 * Note that the refclockproc usec member has now become nsec. 169 * We could either multiply the read-in usec value by 1000 or 170 * we could pad the written string appropriately and read the 171 * resulting value in already scaled. 172 */ 173 sprintf(pp->a_lastcode, 174 "%1x%1x%1x %1x%1x:%1x%1x:%1x%1x.%1x%1x%1x%1x%1x%1x %1x", 175 tp->day100, tp->day10, tp->day1, tp->hour10, tp->hour1, 176 tp->min10, tp->min1, tp->sec10, tp->sec1, tp->ms100, 177 tp->ms10, tp->ms1, tp->usec100, tp->usec10, tp->usec1, 178 tp->status); 179 pp->lencode = strlen(pp->a_lastcode); 180 #ifdef DEBUG 181 if (debug) 182 printf("tpro: time %s timecode %d %s\n", 183 ulfptoa(&pp->lastrec, 6), pp->lencode, 184 pp->a_lastcode); 185 #endif 186 if (sscanf(pp->a_lastcode, "%3d %2d:%2d:%2d.%6ld", &pp->day, 187 &pp->hour, &pp->minute, &pp->second, &pp->nsec) 188 != 5) { 189 refclock_report(peer, CEVNT_BADTIME); 190 return; 191 } 192 pp->nsec *= 1000; /* Convert usec to nsec */ 193 if (!tp->status & 0x3) 194 pp->leap = LEAP_NOTINSYNC; 195 else 196 pp->leap = LEAP_NOWARNING; 197 if (!refclock_process(pp)) { 198 refclock_report(peer, CEVNT_BADTIME); 199 return; 200 } 201 if (peer->burst > 0) 202 return; 203 if (pp->coderecv == pp->codeproc) { 204 refclock_report(peer, CEVNT_TIMEOUT); 205 return; 206 } 207 refclock_receive(peer); 208 pp->lastref = pp->lastrec; 209 record_clock_stats(&peer->srcadr, pp->a_lastcode); 210 refclock_receive(peer); 211 peer->burst = NSTAGE; 212 } 213 214 #else 215 int refclock_tpro_bs; 216 #endif /* REFCLOCK */ 217