| Current Path : /usr/src/contrib/ntp/ntpd/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/contrib/ntp/ntpd/refclock_leitch.c |
/*
* refclock_leitch - clock driver for the Leitch CSD-5300 Master Clock
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#if defined(REFCLOCK) && defined(CLOCK_LEITCH)
#include "ntpd.h"
#include "ntp_io.h"
#include "ntp_refclock.h"
#include "ntp_unixtime.h"
#include <stdio.h>
#include <ctype.h>
#ifdef STREAM
#include <stropts.h>
#if defined(LEITCHCLK)
#include <sys/clkdefs.h>
#endif /* LEITCHCLK */
#endif /* STREAM */
#include "ntp_stdlib.h"
/*
* Driver for Leitch CSD-5300 Master Clock System
*
* COMMANDS:
* DATE: D <CR>
* TIME: T <CR>
* STATUS: S <CR>
* LOOP: L <CR>
*
* FORMAT:
* DATE: YYMMDD<CR>
* TIME: <CR>/HHMMSS <CR>/HHMMSS <CR>/HHMMSS <CR>/
* second bondaried on the stop bit of the <CR>
* second boundaries at '/' above.
* STATUS: G (good), D (diag fail), T (time not provided) or
* P (last phone update failed)
*/
#define MAXUNITS 1 /* max number of LEITCH units */
#define LEITCHREFID "ATOM" /* reference id */
#define LEITCH_DESCRIPTION "Leitch: CSD 5300 Master Clock System Driver"
#define LEITCH232 "/dev/leitch%d" /* name of radio device */
#define SPEED232 B300 /* uart speed (300 baud) */
#ifdef DEBUG
#define leitch_send(A,M) \
if (debug) fprintf(stderr,"write leitch %s\n",M); \
if ((write(A->leitchio.fd,M,sizeof(M)) < 0)) {\
if (debug) \
fprintf(stderr, "leitch_send: unit %d send failed\n", A->unit); \
else \
msyslog(LOG_ERR, "leitch_send: unit %d send failed %m",A->unit);}
#else
#define leitch_send(A,M) \
if ((write(A->leitchio.fd,M,sizeof(M)) < 0)) {\
msyslog(LOG_ERR, "leitch_send: unit %d send failed %m",A->unit);}
#endif
#define STATE_IDLE 0
#define STATE_DATE 1
#define STATE_TIME1 2
#define STATE_TIME2 3
#define STATE_TIME3 4
/*
* LEITCH unit control structure
*/
struct leitchunit {
struct peer *peer;
struct refclockio leitchio;
u_char unit;
short year;
short yearday;
short month;
short day;
short hour;
short second;
short minute;
short state;
u_short fudge1;
l_fp reftime1;
l_fp reftime2;
l_fp reftime3;
l_fp codetime1;
l_fp codetime2;
l_fp codetime3;
u_long yearstart;
};
/*
* Function prototypes
*/
static void leitch_init P((void));
static int leitch_start P((int, struct peer *));
static void leitch_shutdown P((int, struct peer *));
static void leitch_poll P((int, struct peer *));
static void leitch_control P((int, struct refclockstat *, struct refclockstat *, struct peer *));
#define leitch_buginfo noentry
static void leitch_receive P((struct recvbuf *));
static void leitch_process P((struct leitchunit *));
#if 0
static void leitch_timeout P((struct peer *));
#endif
static int leitch_get_date P((struct recvbuf *, struct leitchunit *));
static int leitch_get_time P((struct recvbuf *, struct leitchunit *, int));
static int days_per_year P((int));
static struct leitchunit leitchunits[MAXUNITS];
static u_char unitinuse[MAXUNITS];
static u_char stratumtouse[MAXUNITS];
static u_int32 refid[MAXUNITS];
static char days_in_month [] = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
/*
* Transfer vector
*/
struct refclock refclock_leitch = {
leitch_start, leitch_shutdown, leitch_poll,
leitch_control, leitch_init, leitch_buginfo, NOFLAGS
};
/*
* leitch_init - initialize internal leitch driver data
*/
static void
leitch_init(void)
{
int i;
memset((char*)leitchunits, 0, sizeof(leitchunits));
memset((char*)unitinuse, 0, sizeof(unitinuse));
for (i = 0; i < MAXUNITS; i++)
memcpy((char *)&refid[i], LEITCHREFID, 4);
}
/*
* leitch_shutdown - shut down a LEITCH clock
*/
static void
leitch_shutdown(
int unit,
struct peer *peer
)
{
#ifdef DEBUG
if (debug)
fprintf(stderr, "leitch_shutdown()\n");
#endif
}
/*
* leitch_poll - called by the transmit procedure
*/
static void
leitch_poll(
int unit,
struct peer *peer
)
{
struct leitchunit *leitch;
/* start the state machine rolling */
#ifdef DEBUG
if (debug)
fprintf(stderr, "leitch_poll()\n");
#endif
if (unit >= MAXUNITS) {
/* XXXX syslog it */
return;
}
leitch = &leitchunits[unit];
if (leitch->state != STATE_IDLE) {
/* reset and wait for next poll */
/* XXXX syslog it */
leitch->state = STATE_IDLE;
} else {
leitch_send(leitch,"D\r");
leitch->state = STATE_DATE;
}
}
static void
leitch_control(
int unit,
struct refclockstat *in,
struct refclockstat *out,
struct peer *passed_peer
)
{
if (unit >= MAXUNITS) {
msyslog(LOG_ERR,
"leitch_control: unit %d invalid", unit);
return;
}
if (in) {
if (in->haveflags & CLK_HAVEVAL1)
stratumtouse[unit] = (u_char)(in->fudgeval1);
if (in->haveflags & CLK_HAVEVAL2)
refid[unit] = in->fudgeval2;
if (unitinuse[unit]) {
struct peer *peer;
peer = (&leitchunits[unit])->peer;
peer->stratum = stratumtouse[unit];
peer->refid = refid[unit];
}
}
if (out) {
memset((char *)out, 0, sizeof (struct refclockstat));
out->type = REFCLK_ATOM_LEITCH;
out->haveflags = CLK_HAVEVAL1 | CLK_HAVEVAL2;
out->fudgeval1 = (int32)stratumtouse[unit];
out->fudgeval2 = refid[unit];
out->p_lastcode = "";
out->clockdesc = LEITCH_DESCRIPTION;
}
}
/*
* leitch_start - open the LEITCH devices and initialize data for processing
*/
static int
leitch_start(
int unit,
struct peer *peer
)
{
struct leitchunit *leitch;
int fd232;
char leitchdev[20];
/*
* Check configuration info.
*/
if (unit >= MAXUNITS) {
msyslog(LOG_ERR, "leitch_start: unit %d invalid", unit);
return (0);
}
if (unitinuse[unit]) {
msyslog(LOG_ERR, "leitch_start: unit %d in use", unit);
return (0);
}
/*
* Open serial port.
*/
(void) sprintf(leitchdev, LEITCH232, unit);
fd232 = open(leitchdev, O_RDWR, 0777);
if (fd232 == -1) {
msyslog(LOG_ERR,
"leitch_start: open of %s: %m", leitchdev);
return (0);
}
leitch = &leitchunits[unit];
memset((char*)leitch, 0, sizeof(*leitch));
#if defined(HAVE_SYSV_TTYS)
/*
* System V serial line parameters (termio interface)
*
*/
{ struct termio ttyb;
if (ioctl(fd232, TCGETA, &ttyb) < 0) {
msyslog(LOG_ERR,
"leitch_start: ioctl(%s, TCGETA): %m", leitchdev);
goto screwed;
}
ttyb.c_iflag = IGNBRK|IGNPAR|ICRNL;
ttyb.c_oflag = 0;
ttyb.c_cflag = SPEED232|CS8|CLOCAL|CREAD;
ttyb.c_lflag = ICANON;
ttyb.c_cc[VERASE] = ttyb.c_cc[VKILL] = '\0';
if (ioctl(fd232, TCSETA, &ttyb) < 0) {
msyslog(LOG_ERR,
"leitch_start: ioctl(%s, TCSETA): %m", leitchdev);
goto screwed;
}
}
#endif /* HAVE_SYSV_TTYS */
#if defined(HAVE_TERMIOS)
/*
* POSIX serial line parameters (termios interface)
*
* The LEITCHCLK option provides timestamping at the driver level.
* It requires the tty_clk streams module.
*/
{ struct termios ttyb, *ttyp;
ttyp = &ttyb;
if (tcgetattr(fd232, ttyp) < 0) {
msyslog(LOG_ERR,
"leitch_start: tcgetattr(%s): %m", leitchdev);
goto screwed;
}
ttyp->c_iflag = IGNBRK|IGNPAR|ICRNL;
ttyp->c_oflag = 0;
ttyp->c_cflag = SPEED232|CS8|CLOCAL|CREAD;
ttyp->c_lflag = ICANON;
ttyp->c_cc[VERASE] = ttyp->c_cc[VKILL] = '\0';
if (tcsetattr(fd232, TCSANOW, ttyp) < 0) {
msyslog(LOG_ERR,
"leitch_start: tcsetattr(%s): %m", leitchdev);
goto screwed;
}
if (tcflush(fd232, TCIOFLUSH) < 0) {
msyslog(LOG_ERR,
"leitch_start: tcflush(%s): %m", leitchdev);
goto screwed;
}
}
#endif /* HAVE_TERMIOS */
#ifdef STREAM
#if defined(LEITCHCLK)
if (ioctl(fd232, I_PUSH, "clk") < 0)
msyslog(LOG_ERR,
"leitch_start: ioctl(%s, I_PUSH, clk): %m", leitchdev);
if (ioctl(fd232, CLK_SETSTR, "\n") < 0)
msyslog(LOG_ERR,
"leitch_start: ioctl(%s, CLK_SETSTR): %m", leitchdev);
#endif /* LEITCHCLK */
#endif /* STREAM */
#if defined(HAVE_BSD_TTYS)
/*
* 4.3bsd serial line parameters (sgttyb interface)
*
* The LEITCHCLK option provides timestamping at the driver level.
* It requires the tty_clk line discipline and 4.3bsd or later.
*/
{ struct sgttyb ttyb;
#if defined(LEITCHCLK)
int ldisc = CLKLDISC;
#endif /* LEITCHCLK */
if (ioctl(fd232, TIOCGETP, &ttyb) < 0) {
msyslog(LOG_ERR,
"leitch_start: ioctl(%s, TIOCGETP): %m", leitchdev);
goto screwed;
}
ttyb.sg_ispeed = ttyb.sg_ospeed = SPEED232;
#if defined(LEITCHCLK)
ttyb.sg_erase = ttyb.sg_kill = '\r';
ttyb.sg_flags = RAW;
#else
ttyb.sg_erase = ttyb.sg_kill = '\0';
ttyb.sg_flags = EVENP|ODDP|CRMOD;
#endif /* LEITCHCLK */
if (ioctl(fd232, TIOCSETP, &ttyb) < 0) {
msyslog(LOG_ERR,
"leitch_start: ioctl(%s, TIOCSETP): %m", leitchdev);
goto screwed;
}
#if defined(LEITCHCLK)
if (ioctl(fd232, TIOCSETD, &ldisc) < 0) {
msyslog(LOG_ERR,
"leitch_start: ioctl(%s, TIOCSETD): %m",leitchdev);
goto screwed;
}
#endif /* LEITCHCLK */
}
#endif /* HAVE_BSD_TTYS */
/*
* Set up the structures
*/
leitch->peer = peer;
leitch->unit = unit;
leitch->state = STATE_IDLE;
leitch->fudge1 = 15; /* 15ms */
leitch->leitchio.clock_recv = leitch_receive;
leitch->leitchio.srcclock = (caddr_t) leitch;
leitch->leitchio.datalen = 0;
leitch->leitchio.fd = fd232;
if (!io_addclock(&leitch->leitchio)) {
goto screwed;
}
/*
* All done. Initialize a few random peer variables, then
* return success.
*/
peer->precision = 0;
peer->stratum = stratumtouse[unit];
peer->refid = refid[unit];
unitinuse[unit] = 1;
return(1);
/*
* Something broke; abandon ship.
*/
screwed:
close(fd232);
return(0);
}
/*
* leitch_receive - receive data from the serial interface on a leitch
* clock
*/
static void
leitch_receive(
struct recvbuf *rbufp
)
{
struct leitchunit *leitch = (struct leitchunit *)rbufp->recv_srcclock;
#ifdef DEBUG
if (debug)
fprintf(stderr, "leitch_recieve(%*.*s)\n",
rbufp->recv_length, rbufp->recv_length,
rbufp->recv_buffer);
#endif
if (rbufp->recv_length != 7)
return; /* The date is return with a trailing newline,
discard it. */
switch (leitch->state) {
case STATE_IDLE: /* unexpected, discard and resync */
return;
case STATE_DATE:
if (!leitch_get_date(rbufp,leitch)) {
leitch->state = STATE_IDLE;
break;
}
leitch_send(leitch,"T\r");
#ifdef DEBUG
if (debug)
fprintf(stderr, "%u\n",leitch->yearday);
#endif
leitch->state = STATE_TIME1;
break;
case STATE_TIME1:
if (!leitch_get_time(rbufp,leitch,1)) {
}
if (!clocktime(leitch->yearday,leitch->hour,leitch->minute,
leitch->second, 1, rbufp->recv_time.l_ui,
&leitch->yearstart, &leitch->reftime1.l_ui)) {
leitch->state = STATE_IDLE;
break;
}
leitch->reftime1.l_uf = 0;
#ifdef DEBUG
if (debug)
fprintf(stderr, "%lu\n", (u_long)leitch->reftime1.l_ui);
#endif
MSUTOTSF(leitch->fudge1, leitch->reftime1.l_uf);
leitch->codetime1 = rbufp->recv_time;
leitch->state = STATE_TIME2;
break;
case STATE_TIME2:
if (!leitch_get_time(rbufp,leitch,2)) {
}
if (!clocktime(leitch->yearday,leitch->hour,leitch->minute,
leitch->second, 1, rbufp->recv_time.l_ui,
&leitch->yearstart, &leitch->reftime2.l_ui)) {
leitch->state = STATE_IDLE;
break;
}
#ifdef DEBUG
if (debug)
fprintf(stderr, "%lu\n", (u_long)leitch->reftime2.l_ui);
#endif
MSUTOTSF(leitch->fudge1, leitch->reftime2.l_uf);
leitch->codetime2 = rbufp->recv_time;
leitch->state = STATE_TIME3;
break;
case STATE_TIME3:
if (!leitch_get_time(rbufp,leitch,3)) {
}
if (!clocktime(leitch->yearday,leitch->hour,leitch->minute,
leitch->second, GMT, rbufp->recv_time.l_ui,
&leitch->yearstart, &leitch->reftime3.l_ui)) {
leitch->state = STATE_IDLE;
break;
}
#ifdef DEBUG
if (debug)
fprintf(stderr, "%lu\n", (u_long)leitch->reftime3.l_ui);
#endif
MSUTOTSF(leitch->fudge1, leitch->reftime3.l_uf);
leitch->codetime3 = rbufp->recv_time;
leitch_process(leitch);
leitch->state = STATE_IDLE;
break;
default:
msyslog(LOG_ERR,
"leitech_receive: invalid state %d unit %d",
leitch->state, leitch->unit);
}
}
/*
* leitch_process - process a pile of samples from the clock
*
* This routine uses a three-stage median filter to calculate offset and
* dispersion. reduce jitter. The dispersion is calculated as the span
* of the filter (max - min), unless the quality character (format 2) is
* non-blank, in which case the dispersion is calculated on the basis of
* the inherent tolerance of the internal radio oscillator, which is
* +-2e-5 according to the radio specifications.
*/
static void
leitch_process(
struct leitchunit *leitch
)
{
l_fp off;
l_fp tmp_fp;
/*double doffset;*/
off = leitch->reftime1;
L_SUB(&off,&leitch->codetime1);
tmp_fp = leitch->reftime2;
L_SUB(&tmp_fp,&leitch->codetime2);
if (L_ISGEQ(&off,&tmp_fp))
off = tmp_fp;
tmp_fp = leitch->reftime3;
L_SUB(&tmp_fp,&leitch->codetime3);
if (L_ISGEQ(&off,&tmp_fp))
off = tmp_fp;
/*LFPTOD(&off, doffset);*/
refclock_receive(leitch->peer);
}
/*
* days_per_year
*/
static int
days_per_year(
int year
)
{
if (year%4) { /* not a potential leap year */
return (365);
} else {
if (year % 100) { /* is a leap year */
return (366);
} else {
if (year % 400) {
return (365);
} else {
return (366);
}
}
}
}
static int
leitch_get_date(
struct recvbuf *rbufp,
struct leitchunit *leitch
)
{
int i;
if (rbufp->recv_length < 6)
return(0);
#undef BAD /* confict: defined as (-1) in AIX sys/param.h */
#define BAD(A) (rbufp->recv_buffer[A] < '0') || (rbufp->recv_buffer[A] > '9')
if (BAD(0)||BAD(1)||BAD(2)||BAD(3)||BAD(4)||BAD(5))
return(0);
#define ATOB(A) ((rbufp->recv_buffer[A])-'0')
leitch->year = ATOB(0)*10 + ATOB(1);
leitch->month = ATOB(2)*10 + ATOB(3);
leitch->day = ATOB(4)*10 + ATOB(5);
/* sanity checks */
if (leitch->month > 12)
return(0);
if (leitch->day > days_in_month[leitch->month-1])
return(0);
/* calculate yearday */
i = 0;
leitch->yearday = leitch->day;
while ( i < (leitch->month-1) )
leitch->yearday += days_in_month[i++];
if ((days_per_year((leitch->year>90?1900:2000)+leitch->year)==365) &&
leitch->month > 2)
leitch->yearday--;
return(1);
}
/*
* leitch_get_time
*/
static int
leitch_get_time(
struct recvbuf *rbufp,
struct leitchunit *leitch,
int which
)
{
if (BAD(0)||BAD(1)||BAD(2)||BAD(3)||BAD(4)||BAD(5))
return(0);
leitch->hour = ATOB(0)*10 +ATOB(1);
leitch->minute = ATOB(2)*10 +ATOB(3);
leitch->second = ATOB(4)*10 +ATOB(5);
if ((leitch->hour > 23) || (leitch->minute > 60) ||
(leitch->second > 60))
return(0);
return(1);
}
#else
int refclock_leitch_bs;
#endif /* REFCLOCK */