052d159a8b
4.2.8p12 --> 4.2.8p13 MFC after: immediately Security: CVE-2019-8936 VuXML: c2576e14-36e2-11e9-9eda-206a8a720317 Obtained from: nwtime.org
622 lines
16 KiB
C
622 lines
16 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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* 04/28/2005 Rob Neal
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* Modified to add support for Symmetricom bc637PCI-U Time &
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* Frequency Processor.
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* 2/21/2007 Ali Ghorashi
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* Modified to add support for Symmetricom bc637PCI-U Time &
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* Frequency Processor on Solaris.
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* Tested on Solaris 10 with a bc635 card.
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*
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* Card bus type (VME/VXI or PCI) and environment are specified via the
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* "mode" keyword on the server command in ntp.conf.
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* server 127.127.16.u prefer mode M
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* where u is the id (usually 0) of the entry in /dev (/dev/stfp0)
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*
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* and M is one of the following modes:
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* 1 : FreeBSD PCI 635/637.
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* 2 : Linux or Windows PCI 635/637.
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* 3 : Solaris PCI 635/637
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* not specified, or other number:
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* : Assumed to be VME/VXI legacy Bancomm card on Solaris.
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* Linux and Windows platforms require Symmetricoms' proprietary driver
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* for the TFP card.
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* Solaris requires Symmetricom's driver and its header file (freely distributed) to
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* be installed and running.
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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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#ifdef HAVE_SYS_IOCTL_H
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# include <sys/ioctl.h>
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#endif
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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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#if defined(__FreeBSD__)
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# define READTIME _IOR('u', 5, struct btfp_time )
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#else
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# define READTIME IOCIORN(b, 32, sizeof( struct btfp_time ))
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#endif
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/* Solaris specific section */
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struct stfp_tm {
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int32_t tm_sec;
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int32_t tm_min;
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int32_t tm_hour;
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int32_t tm_mday;
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int32_t tm_mon;
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int32_t tm_year;
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int32_t tm_wday;
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int32_t tm_yday;
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int32_t tm_isdst;
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};
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struct stfp_time {
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struct stfp_tm tm;
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int32_t usec; /* usec 0 - 999999 */
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int32_t hnsec; /* hnsec 0 - 9 (hundreds of nsecs) */
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int32_t status;
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};
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#define SELTIMEFORMAT 2
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# define TIME_DECIMAL 0
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# define TIME_BINARY 1
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#if defined(__sun__)
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#undef READTIME
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#define READTIME 9
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#endif /** __sun___ **/
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/* end solaris specific section */
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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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long frac;
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unsigned short status;
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};
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typedef void *SYMMT_PCI_HANDLE;
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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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* 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 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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void tvme_fill(struct vmedate *, uint32_t btm[2]);
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void stfp_time2tvme(struct vmedate *time_vme, struct stfp_time *stfp);
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static const char *get_devicename(int n);
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/* [Bug 3558] and [Bug 1674] perlinger@ntp.org says:
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*
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* bcReadBinTime() is defined to use two DWORD pointers on Windows and
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* Linux in the BANCOMM SDK. DWORD is of course Windows-specific
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* (*shudder*), and it is defined as 'unsigned long' under
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* Linux/Unix. (*sigh*)
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*
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* This creates quite some headache. The size of 'unsigned long' is
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* platform/compiler/memory-model dependent (LP32 vs LP64 vs LLP64),
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* while the card itself always creates 32bit time stamps. What a
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* bummer. And DWORD has tendency to contain 64bit on Win64 (which is
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* why we have a DWORD32 defined on Win64) so it can be used as
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* substitute for 'UINT_PTR' in Windows API headers. I won't even try
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* to comment on that, because anything I have to say will not be civil.
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*
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* We work around this by possibly using a wrapper function that makes
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* the necessary conversions/casts. It might be a bit tricky to
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* maintain the conditional logic below, but any lingering disease needs
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* constant care to avoid a breakout.
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*/
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#if defined(__linux__)
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typedef unsigned long bcBinTimeT;
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# if SIZEOF_LONG == 4
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# define safeReadBinTime bcReadBinTime
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# endif
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#elif defined(SYS_WINNT)
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typedef DWORD bcBinTimeT;
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# if !defined(_WIN64) || _WIN64 == 0
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# define safeReadBinTime bcReadBinTime
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# endif
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#else
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typedef uint32_t bcBinTimeT;
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# define safeReadBinTime bcReadBinTime
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#endif
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/*
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* Define the bc*() functions as weak so we can compile/link without them.
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* Only clients with the card will have the proprietary vendor device driver
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* and interface library needed for use on Linux/Windows platforms.
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*/
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extern uint32_t __attribute__ ((weak)) bcReadBinTime(SYMMT_PCI_HANDLE, bcBinTimeT*, bcBinTimeT*, uint8_t*);
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extern SYMMT_PCI_HANDLE __attribute__ ((weak)) bcStartPci(void);
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extern void __attribute__ ((weak)) bcStopPci(SYMMT_PCI_HANDLE);
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/* This is the conversion wrapper for the long/DWORD/uint32_t clash in
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* reading binary times.
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*/
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#ifndef safeReadBinTime
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static uint32_t
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safeReadBinTime(
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SYMMT_PCI_HANDLE hnd,
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uint32_t *pt1,
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uint32_t *pt2,
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uint8_t *p3
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)
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{
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bcBinTimeT t1, t2;
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uint32_t rc;
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rc = bcReadBinTime(hnd, &t1, &t2, p3);
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if (rc != 0) {
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*pt1 = (uint32_t)t1;
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*pt2 = (uint32_t)t2;
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}
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return rc;
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}
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#endif /* !defined(safeReadBinTime) */
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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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int tfp_type; /* mode selector, indicate platform and driver interface */
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SYMMT_PCI_HANDLE stfp_handle;
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/* This helper function returns the device name based on the platform we
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* are running on and the device number.
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*
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* Uses a static buffer, so the result is valid only to the next call of
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* this function!
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*/
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static const char*
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get_devicename(int n)
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{
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# if defined(__sun__)
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static const char * const template ="/dev/stfp%d";
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# else
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static const char * const template ="/dev/btfp%d";
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# endif
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static char namebuf[20];
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snprintf(namebuf, sizeof(namebuf), template, n);
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namebuf[sizeof(namebuf)-1] = '\0'; /* paranoia rulez! */
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return namebuf;
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}
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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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tfp_type = (int)(peer->ttl);
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switch (tfp_type) {
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case 1:
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case 3:
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break;
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case 2:
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stfp_handle = bcStartPci(); /* init the card in lin/win */
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break;
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default:
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break;
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}
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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 DEVICE %s\n",get_devicename(peer->refclkunit));
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#endif
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if ( (fd_vme = open(get_devicename(peer->refclkunit), 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 {
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switch (tfp_type) {
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case 1: break;
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case 2: break;
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case 3:break;
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default:
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/* Release capture lockout in case it was set 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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break;
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}
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}
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/*
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* Allocate unit structure
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*/
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vme = emalloc_zero(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 = 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 = peer;
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pp->io.datalen = 0;
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pp->io.fd = fd_vme;
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/* shouldn't there be an io_addclock() call? */
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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 = pp->unitptr;
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io_closeclock(&pp->io);
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pp->unitptr = NULL;
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if (NULL != vme)
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free(vme);
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if (tfp_type == 2)
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bcStopPci(stfp_handle);
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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 = 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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snprintf(pp->a_lastcode,
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sizeof(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->nsec = 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->nsec, 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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pp->lastref = pp->lastrec;
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refclock_receive(peer);
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record_clock_stats(&peer->srcadr, pp->a_lastcode);
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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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char cbuf[7];
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struct btfp_time vts;
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uint32_t btm[2];
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uint8_t dmy;
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struct stfp_time stfpm;
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if (time_vme == NULL)
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time_vme = emalloc(sizeof(*time_vme));
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switch (tfp_type) {
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case 1: /* BSD, PCI, 2 32bit time words */
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if (ioctl(fd_vme, READTIME, &btm)) {
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msyslog(LOG_ERR, "get_bc63x error: %m");
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return(NULL);
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}
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tvme_fill(time_vme, btm);
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break;
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case 2: /* Linux/Windows, PCI, 2 32bit time words */
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if (safeReadBinTime(stfp_handle, &btm[1], &btm[0], &dmy) == 0) {
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msyslog(LOG_ERR, "get_datumtime error: %m");
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return(NULL);
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}
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tvme_fill(time_vme, btm);
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break;
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case 3: /** solaris **/
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memset(&stfpm,0,sizeof(stfpm));
|
|
|
|
/* we need the time in decimal format */
|
|
/* Here we rudely assume that we are the only user of the driver.
|
|
* Other programs will have to set their own time format before reading
|
|
* the time.
|
|
*/
|
|
if(ioctl (fd_vme, SELTIMEFORMAT, TIME_DECIMAL)){
|
|
msyslog(LOG_ERR, "Could not set time format");
|
|
return (NULL);
|
|
}
|
|
/* read the time */
|
|
if (ioctl(fd_vme, READTIME, &stfpm)) {
|
|
msyslog(LOG_ERR, "ioctl error: %m");
|
|
return(NULL);
|
|
}
|
|
stfp_time2tvme(time_vme, &stfpm);
|
|
break;
|
|
|
|
default: /* legacy bancomm card */
|
|
|
|
if (ioctl(fd_vme, READTIME, &vts)) {
|
|
msyslog(LOG_ERR,
|
|
"get_datumtime error: %m");
|
|
return(NULL);
|
|
}
|
|
/* Get day */
|
|
snprintf(cbuf, sizeof(cbuf), "%3.3x",
|
|
((vts.btfp_time[ 0 ] & 0x000f) << 8) +
|
|
((vts.btfp_time[ 1 ] & 0xff00) >> 8));
|
|
time_vme->day = (unsigned short)atoi(cbuf);
|
|
|
|
/* Get hour */
|
|
snprintf(cbuf, sizeof(cbuf), "%2.2x",
|
|
vts.btfp_time[ 1 ] & 0x00ff);
|
|
time_vme->hr = (unsigned short)atoi(cbuf);
|
|
|
|
/* Get minutes */
|
|
snprintf(cbuf, sizeof(cbuf), "%2.2x",
|
|
(vts.btfp_time[ 2 ] & 0xff00) >> 8);
|
|
time_vme->mn = (unsigned short)atoi(cbuf);
|
|
|
|
/* Get seconds */
|
|
snprintf(cbuf, sizeof(cbuf), "%2.2x",
|
|
vts.btfp_time[ 2 ] & 0x00ff);
|
|
time_vme->sec = (unsigned short)atoi(cbuf);
|
|
|
|
/* Get microseconds. Yes, we ignore the 0.1 microsecond digit so
|
|
we can use the TVTOTSF function later on...*/
|
|
|
|
snprintf(cbuf, sizeof(cbuf), "%4.4x%2.2x",
|
|
vts.btfp_time[ 3 ],
|
|
vts.btfp_time[ 4 ] >> 8);
|
|
time_vme->frac = (u_long) atoi(cbuf);
|
|
|
|
/* Get status bit */
|
|
time_vme->status = (vts.btfp_time[0] & 0x0010) >> 4;
|
|
|
|
break;
|
|
}
|
|
|
|
if (time_vme->status)
|
|
return ((void *)NULL);
|
|
else
|
|
return (time_vme);
|
|
}
|
|
/* Assign values to time_vme struct. Mostly for readability */
|
|
void
|
|
tvme_fill(struct vmedate *time_vme, uint32_t btm[2])
|
|
{
|
|
struct tm maj;
|
|
time_t dmaj;
|
|
uint32_t dmin;
|
|
|
|
dmaj = btm[1]; /* syntax sugar & expansion */
|
|
dmin = btm[0]; /* just syntax sugar */
|
|
|
|
gmtime_r(&dmaj, &maj);
|
|
time_vme->day = maj.tm_yday+1;
|
|
time_vme->hr = maj.tm_hour;
|
|
time_vme->mn = maj.tm_min;
|
|
time_vme->sec = maj.tm_sec;
|
|
time_vme->frac = (dmin & 0x000fffff) * 1000;
|
|
time_vme->frac += ((dmin & 0x00f00000) >> 20) * 100;
|
|
time_vme->status = (dmin & 0x01000000) >> 24;
|
|
return;
|
|
}
|
|
|
|
|
|
/* Assign values to time_vme struct. Mostly for readability */
|
|
void
|
|
stfp_time2tvme(struct vmedate *time_vme, struct stfp_time *stfp)
|
|
{
|
|
|
|
time_vme->day = stfp->tm.tm_yday+1;
|
|
time_vme->hr = stfp->tm.tm_hour;
|
|
time_vme->mn = stfp->tm.tm_min;
|
|
time_vme->sec = stfp->tm.tm_sec;
|
|
time_vme->frac = stfp->usec*1000;
|
|
time_vme->frac += stfp->hnsec * 100;
|
|
time_vme->status = stfp->status;
|
|
return;
|
|
}
|
|
#else
|
|
int refclock_bancomm_bs;
|
|
#endif /* REFCLOCK */
|