433 lines
11 KiB
C
433 lines
11 KiB
C
/* refclock_bancomm.c - clock driver for the Datum/Bancomm bc635VME
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* Time and Frequency Processor. It requires the BANCOMM bc635VME/
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* bc350VXI Time and Frequency Processor Module Driver for SunOS4.x
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* and SunOS5.x UNIX Systems. It has been tested on a UltraSparc
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* IIi-cEngine running Solaris 2.6.
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*
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* Author(s): Ganesh Ramasivan & Gary Cliff, Computing Devices Canada,
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* Ottawa, Canada
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*
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* Date: July 1999
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*
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* Note(s): The refclock type has been defined as 16.
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*
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* This program has been modelled after the Bancomm driver
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* originally written by R. Schmidt of Time Service, U.S.
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* Naval Observatory for a HP-UX machine. Since the original
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* authors no longer plan to maintain this code, all
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* references to the HP-UX vme2 driver subsystem bave been
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* removed. Functions vme_report_event(), vme_receive(),
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* vme_control() and vme_buginfo() have been deleted because
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* they are no longer being used.
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*
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* The time on the bc635 TFP must be set to GMT due to the
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* fact that NTP makes use of GMT for all its calculations.
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*
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* Installation of the Datum/Bancomm driver creates the
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* device file /dev/btfp0
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#if defined(REFCLOCK) && defined(CLOCK_BANC)
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#include "ntpd.h"
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#include "ntp_io.h"
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#include "ntp_refclock.h"
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#include "ntp_unixtime.h"
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#include "ntp_stdlib.h"
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#include <stdio.h>
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#include <syslog.h>
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#include <ctype.h>
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/* STUFF BY RES */
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struct btfp_time /* Structure for reading 5 time words */
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/* in one ioctl(2) operation. */
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{
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unsigned short btfp_time[5]; /* Time words 0,1,2,3, and 4. (16bit)*/
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};
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/* SunOS5 ioctl commands definitions.*/
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#define BTFPIOC ( 'b'<< 8 )
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#define IOCIO( l, n ) ( BTFPIOC | n )
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#define IOCIOR( l, n, s ) ( BTFPIOC | n )
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#define IOCIORN( l, n, s ) ( BTFPIOC | n )
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#define IOCIOWN( l, n, s ) ( BTFPIOC | n )
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/***** Simple ioctl commands *****/
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#define RUNLOCK IOCIOR(b, 19, int ) /* Release Capture Lockout */
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#define RCR0 IOCIOR(b, 22, int ) /* Read control register zero.*/
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#define WCR0 IOCIOWN(b, 23, int) /* Write control register zero*/
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/***** Compound ioctl commands *****/
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/* Read all 5 time words in one call. */
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#define READTIME IOCIORN(b, 32, sizeof( struct btfp_time ))
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#define VMEFD "/dev/btfp0"
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struct vmedate { /* structure returned by get_vmetime.c */
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unsigned short year;
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unsigned short day;
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unsigned short hr;
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unsigned short mn;
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unsigned short sec;
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unsigned long frac;
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unsigned short status;
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};
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/* END OF STUFF FROM RES */
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/*
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* VME interface parameters.
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*/
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#define VMEPRECISION (-21) /* precision assumed (1 us) */
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#define USNOREFID "BTFP" /* or whatever */
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#define VMEREFID "BTFP" /* reference id */
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#define VMEDESCRIPTION "Bancomm bc635 TFP" /* who we are */
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#define VMEHSREFID 0x7f7f1000 /* 127.127.16.00 refid hi strata */
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/* clock type 16 is used here */
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#define GMT 0 /* hour offset from Greenwich */
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/*
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* Imported from ntp_timer module
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*/
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extern u_long current_time; /* current time(s) */
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/*
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* Imported from ntpd module
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*/
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extern int debug; /* global debug flag */
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/*
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* VME unit control structure.
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* Changes made to vmeunit structure. Most members are now available in the
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* new refclockproc structure in ntp_refclock.h - 07/99 - Ganesh Ramasivan
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*/
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struct vmeunit {
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struct vmedate vmedata; /* data returned from vme read */
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u_long lasttime; /* last time clock heard from */
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};
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/*
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* Function prototypes
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*/
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static void vme_init (void);
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static int vme_start (int, struct peer *);
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static void vme_shutdown (int, struct peer *);
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static void vme_receive (struct recvbuf *);
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static void vme_poll (int unit, struct peer *);
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struct vmedate *get_datumtime(struct vmedate *);
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/*
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* Transfer vector
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*/
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struct refclock refclock_bancomm = {
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vme_start, /* start up driver */
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vme_shutdown, /* shut down driver */
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vme_poll, /* transmit poll message */
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noentry, /* not used (old vme_control) */
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noentry, /* initialize driver */
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noentry, /* not used (old vme_buginfo) */
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NOFLAGS /* not used */
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};
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int fd_vme; /* file descriptor for ioctls */
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int regvalue;
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/*
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* vme_start - open the VME device and initialize data for processing
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*/
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static int
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vme_start(
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int unit,
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struct peer *peer
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)
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{
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register struct vmeunit *vme;
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struct refclockproc *pp;
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int dummy;
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char vmedev[20];
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/*
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* Open VME device
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*/
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#ifdef DEBUG
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printf("Opening DATUM VME DEVICE \n");
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#endif
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if ( (fd_vme = open(VMEFD, O_RDWR)) < 0) {
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msyslog(LOG_ERR, "vme_start: failed open of %s: %m", vmedev);
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return (0);
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}
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else { /* Release capture lockout in case it was set from before. */
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if( ioctl( fd_vme, RUNLOCK, &dummy ) )
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msyslog(LOG_ERR, "vme_start: RUNLOCK failed %m");
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regvalue = 0; /* More esoteric stuff to do... */
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if( ioctl( fd_vme, WCR0, ®value ) )
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msyslog(LOG_ERR, "vme_start: WCR0 failed %m");
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}
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/*
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* Allocate unit structure
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*/
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vme = (struct vmeunit *)emalloc(sizeof(struct vmeunit));
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bzero((char *)vme, sizeof(struct vmeunit));
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/*
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* Set up the structures
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*/
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pp = peer->procptr;
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pp->unitptr = (caddr_t) vme;
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pp->timestarted = current_time;
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pp->io.clock_recv = vme_receive;
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pp->io.srcclock = (caddr_t)peer;
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pp->io.datalen = 0;
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pp->io.fd = fd_vme;
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/*
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* All done. Initialize a few random peer variables, then
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* return success. Note that root delay and root dispersion are
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* always zero for this clock.
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*/
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peer->precision = VMEPRECISION;
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memcpy(&pp->refid, USNOREFID,4);
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return (1);
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}
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/*
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* vme_shutdown - shut down a VME clock
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*/
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static void
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vme_shutdown(
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int unit,
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struct peer *peer
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)
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{
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register struct vmeunit *vme;
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struct refclockproc *pp;
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/*
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* Tell the I/O module to turn us off. We're history.
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*/
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pp = peer->procptr;
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vme = (struct vmeunit *)pp->unitptr;
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io_closeclock(&pp->io);
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pp->unitptr = NULL;
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free(vme);
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}
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/*
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* vme_receive - receive data from the VME device.
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*
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* Note: This interface would be interrupt-driven. We don't use that
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* now, but include a dummy routine for possible future adventures.
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*/
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static void
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vme_receive(
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struct recvbuf *rbufp
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)
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{
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}
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/*
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* vme_poll - called by the transmit procedure
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*/
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static void
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vme_poll(
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int unit,
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struct peer *peer
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)
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{
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struct vmedate *tptr;
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struct vmeunit *vme;
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struct refclockproc *pp;
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time_t tloc;
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struct tm *tadr;
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pp = peer->procptr;
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vme = (struct vmeunit *)pp->unitptr; /* Here is the structure */
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tptr = &vme->vmedata;
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if ((tptr = get_datumtime(tptr)) == NULL ) {
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refclock_report(peer, CEVNT_BADREPLY);
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return;
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}
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get_systime(&pp->lastrec);
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pp->polls++;
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vme->lasttime = current_time;
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/*
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* Get VME time and convert to timestamp format.
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* The year must come from the system clock.
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*/
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time(&tloc);
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tadr = gmtime(&tloc);
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tptr->year = (unsigned short)(tadr->tm_year + 1900);
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sprintf(pp->a_lastcode,
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"%3.3d %2.2d:%2.2d:%2.2d.%.6ld %1d",
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tptr->day,
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tptr->hr,
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tptr->mn,
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tptr->sec,
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tptr->frac,
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tptr->status);
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pp->lencode = (u_short) strlen(pp->a_lastcode);
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pp->day = tptr->day;
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pp->hour = tptr->hr;
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pp->minute = tptr->mn;
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pp->second = tptr->sec;
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pp->usec = tptr->frac;
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#ifdef DEBUG
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if (debug)
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printf("pp: %3d %02d:%02d:%02d.%06ld %1x\n",
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pp->day, pp->hour, pp->minute, pp->second,
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pp->usec, tptr->status);
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#endif
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if (tptr->status ) { /* Status 0 is locked to ref., 1 is not */
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refclock_report(peer, CEVNT_BADREPLY);
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return;
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}
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/*
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* Now, compute the reference time value. Use the heavy
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* machinery for the seconds and the millisecond field for the
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* fraction when present. If an error in conversion to internal
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* format is found, the program declares bad data and exits.
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* Note that this code does not yet know how to do the years and
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* relies on the clock-calendar chip for sanity.
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*/
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if (!refclock_process(pp)) {
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refclock_report(peer, CEVNT_BADTIME);
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return;
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}
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record_clock_stats(&peer->srcadr, pp->a_lastcode);
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refclock_receive(peer);
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}
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struct vmedate *
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get_datumtime(struct vmedate *time_vme)
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{
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unsigned short status;
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char cbuf[7];
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struct btfp_time vts;
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if ( time_vme == (struct vmedate *)NULL) {
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time_vme = (struct vmedate *)malloc(sizeof(struct vmedate ));
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}
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if( ioctl(fd_vme, READTIME, &vts))
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msyslog(LOG_ERR, "get_datumtime error: %m");
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/* if you want to actually check the validity of these registers, do a
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define of CHECK above this. I didn't find it necessary. - RES
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*/
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#ifdef CHECK
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/* Get day */
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sprintf(cbuf,"%3.3x", ((vts.btfp_time[ 0 ] & 0x000f) <<8) +
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((vts.btfp_time[ 1 ] & 0xff00) >> 8));
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if (isdigit(cbuf[0]) && isdigit(cbuf[1]) && isdigit(cbuf[2]) )
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time_vme->day = (unsigned short)atoi(cbuf);
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else
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time_vme->day = (unsigned short) 0;
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/* Get hour */
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sprintf(cbuf,"%2.2x", vts.btfp_time[ 1 ] & 0x00ff);
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if (isdigit(cbuf[0]) && isdigit(cbuf[1]))
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time_vme->hr = (unsigned short)atoi(cbuf);
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else
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time_vme->hr = (unsigned short) 0;
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/* Get minutes */
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sprintf(cbuf,"%2.2x", (vts.btfp_time[ 2 ] & 0xff00) >>8);
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if (isdigit(cbuf[0]) && isdigit(cbuf[1]))
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time_vme->mn = (unsigned short)atoi(cbuf);
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else
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time_vme->mn = (unsigned short) 0;
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/* Get seconds */
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sprintf(cbuf,"%2.2x", vts.btfp_time[ 2 ] & 0x00ff);
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if (isdigit(cbuf[0]) && isdigit(cbuf[1]))
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time_vme->sec = (unsigned short)atoi(cbuf);
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else
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time_vme->sec = (unsigned short) 0;
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/* Get microseconds. Yes, we ignore the 0.1 microsecond digit so we can
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use the TVTOTSF function later on...*/
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sprintf(cbuf,"%4.4x%2.2x", vts.btfp_time[ 3 ],
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vts.btfp_time[ 4 ]>>8);
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if (isdigit(cbuf[0]) && isdigit(cbuf[1]) && isdigit(cbuf[2])
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&& isdigit(cbuf[3]) && isdigit(cbuf[4]) && isdigit(cbuf[5]))
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time_vme->frac = (u_long) atoi(cbuf);
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else
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time_vme->frac = (u_long) 0;
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#else
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/* DONT CHECK just trust the card */
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/* Get day */
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sprintf(cbuf,"%3.3x", ((vts.btfp_time[ 0 ] & 0x000f) <<8) +
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((vts.btfp_time[ 1 ] & 0xff00) >> 8));
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time_vme->day = (unsigned short)atoi(cbuf);
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/* Get hour */
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sprintf(cbuf,"%2.2x", vts.btfp_time[ 1 ] & 0x00ff);
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time_vme->hr = (unsigned short)atoi(cbuf);
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/* Get minutes */
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sprintf(cbuf,"%2.2x", (vts.btfp_time[ 2 ] & 0xff00) >>8);
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time_vme->mn = (unsigned short)atoi(cbuf);
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/* Get seconds */
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sprintf(cbuf,"%2.2x", vts.btfp_time[ 2 ] & 0x00ff);
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time_vme->sec = (unsigned short)atoi(cbuf);
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/* Get microseconds. Yes, we ignore the 0.1 microsecond digit so we can
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use the TVTOTSF function later on...*/
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sprintf(cbuf,"%4.4x%2.2x", vts.btfp_time[ 3 ],
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vts.btfp_time[ 4 ]>>8);
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time_vme->frac = (u_long) atoi(cbuf);
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#endif /* CHECK */
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/* Get status bit */
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status = (vts.btfp_time[0] & 0x0010) >>4;
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time_vme->status = status; /* Status=0 if locked to ref. */
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/* Status=1 if flywheeling */
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if (status) { /* lost lock ? */
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return ((void *)NULL);
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}
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else
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return (time_vme);
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}
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#else
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int refclock_bancomm_bs;
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#endif /* REFCLOCK */
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