522 lines
12 KiB
C
522 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* PTP 1588 clock support - User space test program
|
|
*
|
|
* Copyright (C) 2010 OMICRON electronics GmbH
|
|
*/
|
|
#define _GNU_SOURCE
|
|
#define __SANE_USERSPACE_TYPES__ /* For PPC64, to get LL64 types */
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <inttypes.h>
|
|
#include <math.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/time.h>
|
|
#include <sys/timex.h>
|
|
#include <sys/types.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
#include <linux/ptp_clock.h>
|
|
|
|
#define DEVICE "/dev/ptp0"
|
|
|
|
#ifndef ADJ_SETOFFSET
|
|
#define ADJ_SETOFFSET 0x0100
|
|
#endif
|
|
|
|
#ifndef CLOCK_INVALID
|
|
#define CLOCK_INVALID -1
|
|
#endif
|
|
|
|
#define NSEC_PER_SEC 1000000000LL
|
|
|
|
/* clock_adjtime is not available in GLIBC < 2.14 */
|
|
#if !__GLIBC_PREREQ(2, 14)
|
|
#include <sys/syscall.h>
|
|
static int clock_adjtime(clockid_t id, struct timex *tx)
|
|
{
|
|
return syscall(__NR_clock_adjtime, id, tx);
|
|
}
|
|
#endif
|
|
|
|
static void show_flag_test(int rq_index, unsigned int flags, int err)
|
|
{
|
|
printf("PTP_EXTTS_REQUEST%c flags 0x%08x : (%d) %s\n",
|
|
rq_index ? '1' + rq_index : ' ',
|
|
flags, err, strerror(errno));
|
|
/* sigh, uClibc ... */
|
|
errno = 0;
|
|
}
|
|
|
|
static void do_flag_test(int fd, unsigned int index)
|
|
{
|
|
struct ptp_extts_request extts_request;
|
|
unsigned long request[2] = {
|
|
PTP_EXTTS_REQUEST,
|
|
PTP_EXTTS_REQUEST2,
|
|
};
|
|
unsigned int enable_flags[5] = {
|
|
PTP_ENABLE_FEATURE,
|
|
PTP_ENABLE_FEATURE | PTP_RISING_EDGE,
|
|
PTP_ENABLE_FEATURE | PTP_FALLING_EDGE,
|
|
PTP_ENABLE_FEATURE | PTP_RISING_EDGE | PTP_FALLING_EDGE,
|
|
PTP_ENABLE_FEATURE | (PTP_EXTTS_VALID_FLAGS + 1),
|
|
};
|
|
int err, i, j;
|
|
|
|
memset(&extts_request, 0, sizeof(extts_request));
|
|
extts_request.index = index;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
for (j = 0; j < 5; j++) {
|
|
extts_request.flags = enable_flags[j];
|
|
err = ioctl(fd, request[i], &extts_request);
|
|
show_flag_test(i, extts_request.flags, err);
|
|
|
|
extts_request.flags = 0;
|
|
err = ioctl(fd, request[i], &extts_request);
|
|
}
|
|
}
|
|
}
|
|
|
|
static clockid_t get_clockid(int fd)
|
|
{
|
|
#define CLOCKFD 3
|
|
return (((unsigned int) ~fd) << 3) | CLOCKFD;
|
|
}
|
|
|
|
static long ppb_to_scaled_ppm(int ppb)
|
|
{
|
|
/*
|
|
* The 'freq' field in the 'struct timex' is in parts per
|
|
* million, but with a 16 bit binary fractional field.
|
|
* Instead of calculating either one of
|
|
*
|
|
* scaled_ppm = (ppb / 1000) << 16 [1]
|
|
* scaled_ppm = (ppb << 16) / 1000 [2]
|
|
*
|
|
* we simply use double precision math, in order to avoid the
|
|
* truncation in [1] and the possible overflow in [2].
|
|
*/
|
|
return (long) (ppb * 65.536);
|
|
}
|
|
|
|
static int64_t pctns(struct ptp_clock_time *t)
|
|
{
|
|
return t->sec * 1000000000LL + t->nsec;
|
|
}
|
|
|
|
static void usage(char *progname)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: %s [options]\n"
|
|
" -c query the ptp clock's capabilities\n"
|
|
" -d name device to open\n"
|
|
" -e val read 'val' external time stamp events\n"
|
|
" -f val adjust the ptp clock frequency by 'val' ppb\n"
|
|
" -g get the ptp clock time\n"
|
|
" -h prints this message\n"
|
|
" -i val index for event/trigger\n"
|
|
" -k val measure the time offset between system and phc clock\n"
|
|
" for 'val' times (Maximum 25)\n"
|
|
" -l list the current pin configuration\n"
|
|
" -L pin,val configure pin index 'pin' with function 'val'\n"
|
|
" the channel index is taken from the '-i' option\n"
|
|
" 'val' specifies the auxiliary function:\n"
|
|
" 0 - none\n"
|
|
" 1 - external time stamp\n"
|
|
" 2 - periodic output\n"
|
|
" -n val shift the ptp clock time by 'val' nanoseconds\n"
|
|
" -p val enable output with a period of 'val' nanoseconds\n"
|
|
" -H val set output phase to 'val' nanoseconds (requires -p)\n"
|
|
" -w val set output pulse width to 'val' nanoseconds (requires -p)\n"
|
|
" -P val enable or disable (val=1|0) the system clock PPS\n"
|
|
" -s set the ptp clock time from the system time\n"
|
|
" -S set the system time from the ptp clock time\n"
|
|
" -t val shift the ptp clock time by 'val' seconds\n"
|
|
" -T val set the ptp clock time to 'val' seconds\n"
|
|
" -z test combinations of rising/falling external time stamp flags\n",
|
|
progname);
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
struct ptp_clock_caps caps;
|
|
struct ptp_extts_event event;
|
|
struct ptp_extts_request extts_request;
|
|
struct ptp_perout_request perout_request;
|
|
struct ptp_pin_desc desc;
|
|
struct timespec ts;
|
|
struct timex tx;
|
|
struct ptp_clock_time *pct;
|
|
struct ptp_sys_offset *sysoff;
|
|
|
|
char *progname;
|
|
unsigned int i;
|
|
int c, cnt, fd;
|
|
|
|
char *device = DEVICE;
|
|
clockid_t clkid;
|
|
int adjfreq = 0x7fffffff;
|
|
int adjtime = 0;
|
|
int adjns = 0;
|
|
int capabilities = 0;
|
|
int extts = 0;
|
|
int flagtest = 0;
|
|
int gettime = 0;
|
|
int index = 0;
|
|
int list_pins = 0;
|
|
int pct_offset = 0;
|
|
int n_samples = 0;
|
|
int pin_index = -1, pin_func;
|
|
int pps = -1;
|
|
int seconds = 0;
|
|
int settime = 0;
|
|
|
|
int64_t t1, t2, tp;
|
|
int64_t interval, offset;
|
|
int64_t perout_phase = -1;
|
|
int64_t pulsewidth = -1;
|
|
int64_t perout = -1;
|
|
|
|
progname = strrchr(argv[0], '/');
|
|
progname = progname ? 1+progname : argv[0];
|
|
while (EOF != (c = getopt(argc, argv, "cd:e:f:ghH:i:k:lL:n:p:P:sSt:T:w:z"))) {
|
|
switch (c) {
|
|
case 'c':
|
|
capabilities = 1;
|
|
break;
|
|
case 'd':
|
|
device = optarg;
|
|
break;
|
|
case 'e':
|
|
extts = atoi(optarg);
|
|
break;
|
|
case 'f':
|
|
adjfreq = atoi(optarg);
|
|
break;
|
|
case 'g':
|
|
gettime = 1;
|
|
break;
|
|
case 'H':
|
|
perout_phase = atoll(optarg);
|
|
break;
|
|
case 'i':
|
|
index = atoi(optarg);
|
|
break;
|
|
case 'k':
|
|
pct_offset = 1;
|
|
n_samples = atoi(optarg);
|
|
break;
|
|
case 'l':
|
|
list_pins = 1;
|
|
break;
|
|
case 'L':
|
|
cnt = sscanf(optarg, "%d,%d", &pin_index, &pin_func);
|
|
if (cnt != 2) {
|
|
usage(progname);
|
|
return -1;
|
|
}
|
|
break;
|
|
case 'n':
|
|
adjns = atoi(optarg);
|
|
break;
|
|
case 'p':
|
|
perout = atoll(optarg);
|
|
break;
|
|
case 'P':
|
|
pps = atoi(optarg);
|
|
break;
|
|
case 's':
|
|
settime = 1;
|
|
break;
|
|
case 'S':
|
|
settime = 2;
|
|
break;
|
|
case 't':
|
|
adjtime = atoi(optarg);
|
|
break;
|
|
case 'T':
|
|
settime = 3;
|
|
seconds = atoi(optarg);
|
|
break;
|
|
case 'w':
|
|
pulsewidth = atoi(optarg);
|
|
break;
|
|
case 'z':
|
|
flagtest = 1;
|
|
break;
|
|
case 'h':
|
|
usage(progname);
|
|
return 0;
|
|
case '?':
|
|
default:
|
|
usage(progname);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
fd = open(device, O_RDWR);
|
|
if (fd < 0) {
|
|
fprintf(stderr, "opening %s: %s\n", device, strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
clkid = get_clockid(fd);
|
|
if (CLOCK_INVALID == clkid) {
|
|
fprintf(stderr, "failed to read clock id\n");
|
|
return -1;
|
|
}
|
|
|
|
if (capabilities) {
|
|
if (ioctl(fd, PTP_CLOCK_GETCAPS, &caps)) {
|
|
perror("PTP_CLOCK_GETCAPS");
|
|
} else {
|
|
printf("capabilities:\n"
|
|
" %d maximum frequency adjustment (ppb)\n"
|
|
" %d programmable alarms\n"
|
|
" %d external time stamp channels\n"
|
|
" %d programmable periodic signals\n"
|
|
" %d pulse per second\n"
|
|
" %d programmable pins\n"
|
|
" %d cross timestamping\n"
|
|
" %d adjust_phase\n",
|
|
caps.max_adj,
|
|
caps.n_alarm,
|
|
caps.n_ext_ts,
|
|
caps.n_per_out,
|
|
caps.pps,
|
|
caps.n_pins,
|
|
caps.cross_timestamping,
|
|
caps.adjust_phase);
|
|
}
|
|
}
|
|
|
|
if (0x7fffffff != adjfreq) {
|
|
memset(&tx, 0, sizeof(tx));
|
|
tx.modes = ADJ_FREQUENCY;
|
|
tx.freq = ppb_to_scaled_ppm(adjfreq);
|
|
if (clock_adjtime(clkid, &tx)) {
|
|
perror("clock_adjtime");
|
|
} else {
|
|
puts("frequency adjustment okay");
|
|
}
|
|
}
|
|
|
|
if (adjtime || adjns) {
|
|
memset(&tx, 0, sizeof(tx));
|
|
tx.modes = ADJ_SETOFFSET | ADJ_NANO;
|
|
tx.time.tv_sec = adjtime;
|
|
tx.time.tv_usec = adjns;
|
|
while (tx.time.tv_usec < 0) {
|
|
tx.time.tv_sec -= 1;
|
|
tx.time.tv_usec += 1000000000;
|
|
}
|
|
|
|
if (clock_adjtime(clkid, &tx) < 0) {
|
|
perror("clock_adjtime");
|
|
} else {
|
|
puts("time shift okay");
|
|
}
|
|
}
|
|
|
|
if (gettime) {
|
|
if (clock_gettime(clkid, &ts)) {
|
|
perror("clock_gettime");
|
|
} else {
|
|
printf("clock time: %ld.%09ld or %s",
|
|
ts.tv_sec, ts.tv_nsec, ctime(&ts.tv_sec));
|
|
}
|
|
}
|
|
|
|
if (settime == 1) {
|
|
clock_gettime(CLOCK_REALTIME, &ts);
|
|
if (clock_settime(clkid, &ts)) {
|
|
perror("clock_settime");
|
|
} else {
|
|
puts("set time okay");
|
|
}
|
|
}
|
|
|
|
if (settime == 2) {
|
|
clock_gettime(clkid, &ts);
|
|
if (clock_settime(CLOCK_REALTIME, &ts)) {
|
|
perror("clock_settime");
|
|
} else {
|
|
puts("set time okay");
|
|
}
|
|
}
|
|
|
|
if (settime == 3) {
|
|
ts.tv_sec = seconds;
|
|
ts.tv_nsec = 0;
|
|
if (clock_settime(clkid, &ts)) {
|
|
perror("clock_settime");
|
|
} else {
|
|
puts("set time okay");
|
|
}
|
|
}
|
|
|
|
if (pin_index >= 0) {
|
|
memset(&desc, 0, sizeof(desc));
|
|
desc.index = pin_index;
|
|
desc.func = pin_func;
|
|
desc.chan = index;
|
|
if (ioctl(fd, PTP_PIN_SETFUNC, &desc)) {
|
|
perror("PTP_PIN_SETFUNC");
|
|
} else {
|
|
puts("set pin function okay");
|
|
}
|
|
}
|
|
|
|
if (extts) {
|
|
memset(&extts_request, 0, sizeof(extts_request));
|
|
extts_request.index = index;
|
|
extts_request.flags = PTP_ENABLE_FEATURE;
|
|
if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) {
|
|
perror("PTP_EXTTS_REQUEST");
|
|
extts = 0;
|
|
} else {
|
|
puts("external time stamp request okay");
|
|
}
|
|
for (; extts; extts--) {
|
|
cnt = read(fd, &event, sizeof(event));
|
|
if (cnt != sizeof(event)) {
|
|
perror("read");
|
|
break;
|
|
}
|
|
printf("event index %u at %lld.%09u\n", event.index,
|
|
event.t.sec, event.t.nsec);
|
|
fflush(stdout);
|
|
}
|
|
/* Disable the feature again. */
|
|
extts_request.flags = 0;
|
|
if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) {
|
|
perror("PTP_EXTTS_REQUEST");
|
|
}
|
|
}
|
|
|
|
if (flagtest) {
|
|
do_flag_test(fd, index);
|
|
}
|
|
|
|
if (list_pins) {
|
|
int n_pins = 0;
|
|
if (ioctl(fd, PTP_CLOCK_GETCAPS, &caps)) {
|
|
perror("PTP_CLOCK_GETCAPS");
|
|
} else {
|
|
n_pins = caps.n_pins;
|
|
}
|
|
for (i = 0; i < n_pins; i++) {
|
|
desc.index = i;
|
|
if (ioctl(fd, PTP_PIN_GETFUNC, &desc)) {
|
|
perror("PTP_PIN_GETFUNC");
|
|
break;
|
|
}
|
|
printf("name %s index %u func %u chan %u\n",
|
|
desc.name, desc.index, desc.func, desc.chan);
|
|
}
|
|
}
|
|
|
|
if (pulsewidth >= 0 && perout < 0) {
|
|
puts("-w can only be specified together with -p");
|
|
return -1;
|
|
}
|
|
|
|
if (perout_phase >= 0 && perout < 0) {
|
|
puts("-H can only be specified together with -p");
|
|
return -1;
|
|
}
|
|
|
|
if (perout >= 0) {
|
|
if (clock_gettime(clkid, &ts)) {
|
|
perror("clock_gettime");
|
|
return -1;
|
|
}
|
|
memset(&perout_request, 0, sizeof(perout_request));
|
|
perout_request.index = index;
|
|
perout_request.period.sec = perout / NSEC_PER_SEC;
|
|
perout_request.period.nsec = perout % NSEC_PER_SEC;
|
|
perout_request.flags = 0;
|
|
if (pulsewidth >= 0) {
|
|
perout_request.flags |= PTP_PEROUT_DUTY_CYCLE;
|
|
perout_request.on.sec = pulsewidth / NSEC_PER_SEC;
|
|
perout_request.on.nsec = pulsewidth % NSEC_PER_SEC;
|
|
}
|
|
if (perout_phase >= 0) {
|
|
perout_request.flags |= PTP_PEROUT_PHASE;
|
|
perout_request.phase.sec = perout_phase / NSEC_PER_SEC;
|
|
perout_request.phase.nsec = perout_phase % NSEC_PER_SEC;
|
|
} else {
|
|
perout_request.start.sec = ts.tv_sec + 2;
|
|
perout_request.start.nsec = 0;
|
|
}
|
|
|
|
if (ioctl(fd, PTP_PEROUT_REQUEST2, &perout_request)) {
|
|
perror("PTP_PEROUT_REQUEST");
|
|
} else {
|
|
puts("periodic output request okay");
|
|
}
|
|
}
|
|
|
|
if (pps != -1) {
|
|
int enable = pps ? 1 : 0;
|
|
if (ioctl(fd, PTP_ENABLE_PPS, enable)) {
|
|
perror("PTP_ENABLE_PPS");
|
|
} else {
|
|
puts("pps for system time request okay");
|
|
}
|
|
}
|
|
|
|
if (pct_offset) {
|
|
if (n_samples <= 0 || n_samples > 25) {
|
|
puts("n_samples should be between 1 and 25");
|
|
usage(progname);
|
|
return -1;
|
|
}
|
|
|
|
sysoff = calloc(1, sizeof(*sysoff));
|
|
if (!sysoff) {
|
|
perror("calloc");
|
|
return -1;
|
|
}
|
|
sysoff->n_samples = n_samples;
|
|
|
|
if (ioctl(fd, PTP_SYS_OFFSET, sysoff))
|
|
perror("PTP_SYS_OFFSET");
|
|
else
|
|
puts("system and phc clock time offset request okay");
|
|
|
|
pct = &sysoff->ts[0];
|
|
for (i = 0; i < sysoff->n_samples; i++) {
|
|
t1 = pctns(pct+2*i);
|
|
tp = pctns(pct+2*i+1);
|
|
t2 = pctns(pct+2*i+2);
|
|
interval = t2 - t1;
|
|
offset = (t2 + t1) / 2 - tp;
|
|
|
|
printf("system time: %lld.%09u\n",
|
|
(pct+2*i)->sec, (pct+2*i)->nsec);
|
|
printf("phc time: %lld.%09u\n",
|
|
(pct+2*i+1)->sec, (pct+2*i+1)->nsec);
|
|
printf("system time: %lld.%09u\n",
|
|
(pct+2*i+2)->sec, (pct+2*i+2)->nsec);
|
|
printf("system/phc clock time offset is %" PRId64 " ns\n"
|
|
"system clock time delay is %" PRId64 " ns\n",
|
|
offset, interval);
|
|
}
|
|
|
|
free(sysoff);
|
|
}
|
|
|
|
close(fd);
|
|
return 0;
|
|
}
|