1 /* $NetBSD: refclock_tpro.c,v 1.1.1.2 2012/01/31 21:25:47 kardel Exp $ */ 2 3 /* 4 * refclock_tpro - clock driver for the KSI/Odetics TPRO-S IRIG-B reader 5 */ 6 7 #ifdef HAVE_CONFIG_H 8 #include <config.h> 9 #endif 10 11 #if defined(REFCLOCK) && defined(CLOCK_TPRO) 12 13 #include "ntpd.h" 14 #include "ntp_io.h" 15 #include "ntp_refclock.h" 16 #include "ntp_unixtime.h" 17 #include "sys/tpro.h" 18 #include "ntp_stdlib.h" 19 20 #include <stdio.h> 21 #include <ctype.h> 22 23 /* 24 * This driver supports the KSI/Odetecs TPRO-S IRIG-B reader and TPRO- 25 * SAT GPS receiver for the Sun Microsystems SBus. It requires that the 26 * tpro.o device driver be installed and loaded. 27 */ 28 29 /* 30 * TPRO interface definitions 31 */ 32 #define DEVICE "/dev/tpro%d" /* device name and unit */ 33 #define PRECISION (-20) /* precision assumed (1 us) */ 34 #define REFID "IRIG" /* reference ID */ 35 #define DESCRIPTION "KSI/Odetics TPRO/S IRIG Interface" /* WRU */ 36 37 /* 38 * Unit control structure 39 */ 40 struct tprounit { 41 struct tproval tprodata; /* data returned from tpro read */ 42 }; 43 44 /* 45 * Function prototypes 46 */ 47 static int tpro_start (int, struct peer *); 48 static void tpro_shutdown (int, struct peer *); 49 static void tpro_poll (int unit, struct peer *); 50 51 /* 52 * Transfer vector 53 */ 54 struct refclock refclock_tpro = { 55 tpro_start, /* start up driver */ 56 tpro_shutdown, /* shut down driver */ 57 tpro_poll, /* transmit poll message */ 58 noentry, /* not used (old tpro_control) */ 59 noentry, /* initialize driver (not used) */ 60 noentry, /* not used (old tpro_buginfo) */ 61 NOFLAGS /* not used */ 62 }; 63 64 65 /* 66 * tpro_start - open the TPRO device and initialize data for processing 67 */ 68 static int 69 tpro_start( 70 int unit, 71 struct peer *peer 72 ) 73 { 74 register struct tprounit *up; 75 struct refclockproc *pp; 76 char device[20]; 77 int fd; 78 79 /* 80 * Open TPRO device 81 */ 82 snprintf(device, sizeof(device), DEVICE, unit); 83 fd = open(device, O_RDONLY | O_NDELAY, 0777); 84 if (fd == -1) { 85 msyslog(LOG_ERR, "tpro_start: open of %s: %m", device); 86 return (0); 87 } 88 89 /* 90 * Allocate and initialize unit structure 91 */ 92 up = emalloc(sizeof(*up)); 93 memset(up, 0, sizeof(*up)); 94 pp = peer->procptr; 95 pp->io.clock_recv = noentry; 96 pp->io.srcclock = (caddr_t)peer; 97 pp->io.datalen = 0; 98 pp->io.fd = fd; 99 pp->unitptr = (caddr_t)up; 100 101 /* 102 * Initialize miscellaneous peer variables 103 */ 104 peer->precision = PRECISION; 105 peer->burst = NSTAGE; 106 pp->clockdesc = DESCRIPTION; 107 memcpy((char *)&pp->refid, REFID, 4); 108 return (1); 109 } 110 111 112 /* 113 * tpro_shutdown - shut down the clock 114 */ 115 static void 116 tpro_shutdown( 117 int unit, 118 struct peer *peer 119 ) 120 { 121 register struct tprounit *up; 122 struct refclockproc *pp; 123 124 pp = peer->procptr; 125 up = (struct tprounit *)pp->unitptr; 126 io_closeclock(&pp->io); 127 if (NULL != up) 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 snprintf(pp->a_lastcode, sizeof(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 pp->lastref = pp->lastrec; 208 record_clock_stats(&peer->srcadr, pp->a_lastcode); 209 refclock_receive(peer); 210 peer->burst = NSTAGE; 211 } 212 213 #else 214 int refclock_tpro_bs; 215 #endif /* REFCLOCK */ 216