[deliverable/linux.git] / Documentation / ptp / testptp.c

/*
 * PTP 1588 clock support - User space test program
 *
 * Copyright (C) 2010 OMICRON electronics GmbH
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#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

/* 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 clockid_t get_clockid(int fd)
{
#define CLOCKFD 3
#define FD_TO_CLOCKID(fd)	((~(clockid_t) (fd) << 3) | CLOCKFD)

	return FD_TO_CLOCKID(fd);
}

static void handle_alarm(int s)
{
	printf("received signal %d\n", s);
}

static int install_handler(int signum, void (*handler)(int))
{
	struct sigaction action;
	sigset_t mask;

	/* Unblock the signal. */
	sigemptyset(&mask);
	sigaddset(&mask, signum);
	sigprocmask(SIG_UNBLOCK, &mask, NULL);

	/* Install the signal handler. */
	action.sa_handler = handler;
	action.sa_flags = 0;
	sigemptyset(&action.sa_mask);
	sigaction(signum, &action, NULL);

	return 0;
}

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"
		" -a val     request a one-shot alarm after 'val' seconds\n"
		" -A val     request a periodic alarm every 'val' seconds\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"
		" -p val     enable output with a period of 'val' nanoseconds\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",
		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;

	static timer_t timerid;
	struct itimerspec timeout;
	struct sigevent sigevent;

	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 capabilities = 0;
	int extts = 0;
	int gettime = 0;
	int index = 0;
	int list_pins = 0;
	int oneshot = 0;
	int pct_offset = 0;
	int n_samples = 0;
	int periodic = 0;
	int perout = -1;
	int pin_index = -1, pin_func;
	int pps = -1;
	int seconds = 0;
	int settime = 0;

	int64_t t1, t2, tp;
	int64_t interval, offset;

	progname = strrchr(argv[0], '/');
	progname = progname ? 1+progname : argv[0];
	while (EOF != (c = getopt(argc, argv, "a:A:cd:e:f:ghi:k:lL:p:P:sSt:T:v"))) {
		switch (c) {
		case 'a':
			oneshot = atoi(optarg);
			break;
		case 'A':
			periodic = atoi(optarg);
			break;
		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 '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 'p':
			perout = atoi(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 '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",
			       caps.max_adj,
			       caps.n_alarm,
			       caps.n_ext_ts,
			       caps.n_per_out,
			       caps.pps,
			       caps.n_pins,
			       caps.cross_timestamping);
		}
	}

	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) {
		memset(&tx, 0, sizeof(tx));
		tx.modes = ADJ_SETOFFSET;
		tx.time.tv_sec = adjtime;
		tx.time.tv_usec = 0;
		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 (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 (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 (oneshot) {
		install_handler(SIGALRM, handle_alarm);
		/* Create a timer. */
		sigevent.sigev_notify = SIGEV_SIGNAL;
		sigevent.sigev_signo = SIGALRM;
		if (timer_create(clkid, &sigevent, &timerid)) {
			perror("timer_create");
			return -1;
		}
		/* Start the timer. */
		memset(&timeout, 0, sizeof(timeout));
		timeout.it_value.tv_sec = oneshot;
		if (timer_settime(timerid, 0, &timeout, NULL)) {
			perror("timer_settime");
			return -1;
		}
		pause();
		timer_delete(timerid);
	}

	if (periodic) {
		install_handler(SIGALRM, handle_alarm);
		/* Create a timer. */
		sigevent.sigev_notify = SIGEV_SIGNAL;
		sigevent.sigev_signo = SIGALRM;
		if (timer_create(clkid, &sigevent, &timerid)) {
			perror("timer_create");
			return -1;
		}
		/* Start the timer. */
		memset(&timeout, 0, sizeof(timeout));
		timeout.it_interval.tv_sec = periodic;
		timeout.it_value.tv_sec = periodic;
		if (timer_settime(timerid, 0, &timeout, NULL)) {
			perror("timer_settime");
			return -1;
		}
		while (1) {
			pause();
		}
		timer_delete(timerid);
	}

	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.start.sec = ts.tv_sec + 2;
		perout_request.start.nsec = 0;
		perout_request.period.sec = 0;
		perout_request.period.nsec = perout;
		if (ioctl(fd, PTP_PEROUT_REQUEST, &perout_request)) {
			perror("PTP_PEROUT_REQUEST");
		} else {
			puts("periodic output request 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 (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.%u\n",
				(pct+2*i)->sec, (pct+2*i)->nsec);
			printf("phc    time: %lld.%u\n",
				(pct+2*i+1)->sec, (pct+2*i+1)->nsec);
			printf("system time: %lld.%u\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;
}
Commit	Line	Data
d94ba80e RC	1	/*
	2	* PTP 1588 clock support - User space test program
	3	*
	4	* Copyright (C) 2010 OMICRON electronics GmbH
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	19	*/
42e1358e	20	#define _GNU_SOURCE
9ae6d493	21	#define __SANE_USERSPACE_TYPES__ /* For PPC64, to get LL64 types */
d94ba80e RC	22	#include <errno.h>
d94ba80e RC	23	#include <fcntl.h>
4ec54f95	24	#include <inttypes.h>
d94ba80e RC	25	#include <math.h>
	26	#include <signal.h>
	27	#include <stdio.h>
	28	#include <stdlib.h>
	29	#include <string.h>
	30	#include <sys/ioctl.h>
	31	#include <sys/mman.h>
	32	#include <sys/stat.h>
	33	#include <sys/time.h>
	34	#include <sys/timex.h>
	35	#include <sys/types.h>
	36	#include <time.h>
	37	#include <unistd.h>
	38
	39	#include <linux/ptp_clock.h>
	40
	41	#define DEVICE "/dev/ptp0"
	42
	43	#ifndef ADJ_SETOFFSET
	44	#define ADJ_SETOFFSET 0x0100
	45	#endif
	46
	47	#ifndef CLOCK_INVALID
	48	#define CLOCK_INVALID -1
	49	#endif
	50
42e1358e CR	51	/* clock_adjtime is not available in GLIBC < 2.14 */
42e1358e CR	52	#if !__GLIBC_PREREQ(2, 14)
d94ba80e RC	53	#include <sys/syscall.h>
	54	static int clock_adjtime(clockid_t id, struct timex *tx)
	55	{
	56	return syscall(__NR_clock_adjtime, id, tx);
	57	}
42e1358e	58	#endif
d94ba80e RC	59
	60	static clockid_t get_clockid(int fd)
	61	{
	62	#define CLOCKFD 3
	63	#define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) \| CLOCKFD)
	64
	65	return FD_TO_CLOCKID(fd);
	66	}
	67
	68	static void handle_alarm(int s)
	69	{
	70	printf("received signal %d\n", s);
	71	}
	72
	73	static int install_handler(int signum, void (*handler)(int))
	74	{
	75	struct sigaction action;
	76	sigset_t mask;
	77
	78	/* Unblock the signal. */
	79	sigemptyset(&mask);
	80	sigaddset(&mask, signum);
	81	sigprocmask(SIG_UNBLOCK, &mask, NULL);
	82
	83	/* Install the signal handler. */
	84	action.sa_handler = handler;
	85	action.sa_flags = 0;
	86	sigemptyset(&action.sa_mask);
	87	sigaction(signum, &action, NULL);
	88
	89	return 0;
	90	}
	91
	92	static long ppb_to_scaled_ppm(int ppb)
	93	{
	94	/*
	95	* The 'freq' field in the 'struct timex' is in parts per
	96	* million, but with a 16 bit binary fractional field.
	97	* Instead of calculating either one of
	98	*
	99	* scaled_ppm = (ppb / 1000) << 16 [1]
	100	* scaled_ppm = (ppb << 16) / 1000 [2]
	101	*
	102	* we simply use double precision math, in order to avoid the
	103	* truncation in [1] and the possible overflow in [2].
	104	*/
	105	return (long) (ppb * 65.536);
	106	}
	107
568ebc59 DZ	108	static int64_t pctns(struct ptp_clock_time *t)
	109	{
	110	return t->sec * 1000000000LL + t->nsec;
	111	}
	112
d94ba80e RC	113	static void usage(char *progname)
	114	{
	115	fprintf(stderr,
	116	"usage: %s [options]\n"
	117	" -a val request a one-shot alarm after 'val' seconds\n"
	118	" -A val request a periodic alarm every 'val' seconds\n"
	119	" -c query the ptp clock's capabilities\n"
	120	" -d name device to open\n"
	121	" -e val read 'val' external time stamp events\n"
	122	" -f val adjust the ptp clock frequency by 'val' ppb\n"
	123	" -g get the ptp clock time\n"
	124	" -h prints this message\n"
61950e82	125	" -i val index for event/trigger\n"
568ebc59 DZ	126	" -k val measure the time offset between system and phc clock\n"
568ebc59 DZ	127	" for 'val' times (Maximum 25)\n"
888a3687 RC	128	" -l list the current pin configuration\n"
	129	" -L pin,val configure pin index 'pin' with function 'val'\n"
	130	" the channel index is taken from the '-i' option\n"
	131	" 'val' specifies the auxiliary function:\n"
	132	" 0 - none\n"
	133	" 1 - external time stamp\n"
	134	" 2 - periodic output\n"
d94ba80e RC	135	" -p val enable output with a period of 'val' nanoseconds\n"
	136	" -P val enable or disable (val=1\|0) the system clock PPS\n"
	137	" -s set the ptp clock time from the system time\n"
	138	" -S set the system time from the ptp clock time\n"
271c83de MR	139	" -t val shift the ptp clock time by 'val' seconds\n"
271c83de MR	140	" -T val set the ptp clock time to 'val' seconds\n",
d94ba80e RC	141	progname);
	142	}
	143
	144	int main(int argc, char *argv[])
	145	{
	146	struct ptp_clock_caps caps;
	147	struct ptp_extts_event event;
	148	struct ptp_extts_request extts_request;
	149	struct ptp_perout_request perout_request;
888a3687	150	struct ptp_pin_desc desc;
d94ba80e RC	151	struct timespec ts;
	152	struct timex tx;
	153
	154	static timer_t timerid;
	155	struct itimerspec timeout;
	156	struct sigevent sigevent;
	157
568ebc59 DZ	158	struct ptp_clock_time *pct;
	159	struct ptp_sys_offset *sysoff;
	160
	161
d94ba80e	162	char *progname;
f0cd147e MK	163	unsigned int i;
f0cd147e MK	164	int c, cnt, fd;
d94ba80e RC	165
	166	char *device = DEVICE;
	167	clockid_t clkid;
	168	int adjfreq = 0x7fffffff;
	169	int adjtime = 0;
	170	int capabilities = 0;
	171	int extts = 0;
	172	int gettime = 0;
61950e82	173	int index = 0;
888a3687	174	int list_pins = 0;
d94ba80e	175	int oneshot = 0;
568ebc59 DZ	176	int pct_offset = 0;
568ebc59 DZ	177	int n_samples = 0;
d94ba80e RC	178	int periodic = 0;
d94ba80e RC	179	int perout = -1;
888a3687	180	int pin_index = -1, pin_func;
d94ba80e	181	int pps = -1;
271c83de	182	int seconds = 0;
d94ba80e RC	183	int settime = 0;
d94ba80e RC	184
568ebc59 DZ	185	int64_t t1, t2, tp;
	186	int64_t interval, offset;
	187
d94ba80e RC	188	progname = strrchr(argv[0], '/');
d94ba80e RC	189	progname = progname ? 1+progname : argv[0];
271c83de	190	while (EOF != (c = getopt(argc, argv, "a:A:cd:e:f:ghi:k:lL:p:P:sSt:T:v"))) {
d94ba80e RC	191	switch (c) {
	192	case 'a':
	193	oneshot = atoi(optarg);
	194	break;
	195	case 'A':
	196	periodic = atoi(optarg);
	197	break;
	198	case 'c':
	199	capabilities = 1;
	200	break;
	201	case 'd':
	202	device = optarg;
	203	break;
	204	case 'e':
	205	extts = atoi(optarg);
	206	break;
	207	case 'f':
	208	adjfreq = atoi(optarg);
	209	break;
	210	case 'g':
	211	gettime = 1;
	212	break;
61950e82 SS	213	case 'i':
	214	index = atoi(optarg);
	215	break;
568ebc59 DZ	216	case 'k':
	217	pct_offset = 1;
	218	n_samples = atoi(optarg);
	219	break;
888a3687 RC	220	case 'l':
	221	list_pins = 1;
	222	break;
	223	case 'L':
	224	cnt = sscanf(optarg, "%d,%d", &pin_index, &pin_func);
	225	if (cnt != 2) {
	226	usage(progname);
	227	return -1;
	228	}
	229	break;
d94ba80e RC	230	case 'p':
	231	perout = atoi(optarg);
	232	break;
	233	case 'P':
	234	pps = atoi(optarg);
	235	break;
	236	case 's':
	237	settime = 1;
	238	break;
	239	case 'S':
	240	settime = 2;
	241	break;
	242	case 't':
	243	adjtime = atoi(optarg);
	244	break;
271c83de MR	245	case 'T':
	246	settime = 3;
	247	seconds = atoi(optarg);
	248	break;
d94ba80e RC	249	case 'h':
	250	usage(progname);
	251	return 0;
	252	case '?':
	253	default:
	254	usage(progname);
	255	return -1;
	256	}
	257	}
	258
	259	fd = open(device, O_RDWR);
	260	if (fd < 0) {
	261	fprintf(stderr, "opening %s: %s\n", device, strerror(errno));
	262	return -1;
	263	}
	264
	265	clkid = get_clockid(fd);
	266	if (CLOCK_INVALID == clkid) {
	267	fprintf(stderr, "failed to read clock id\n");
	268	return -1;
	269	}
	270
	271	if (capabilities) {
	272	if (ioctl(fd, PTP_CLOCK_GETCAPS, &caps)) {
	273	perror("PTP_CLOCK_GETCAPS");
	274	} else {
	275	printf("capabilities:\n"
	276	" %d maximum frequency adjustment (ppb)\n"
	277	" %d programmable alarms\n"
	278	" %d external time stamp channels\n"
	279	" %d programmable periodic signals\n"
888a3687	280	" %d pulse per second\n"
719f1aa4 CH	281	" %d programmable pins\n"
719f1aa4 CH	282	" %d cross timestamping\n",
d94ba80e RC	283	caps.max_adj,
	284	caps.n_alarm,
	285	caps.n_ext_ts,
	286	caps.n_per_out,
888a3687	287	caps.pps,
719f1aa4 CH	288	caps.n_pins,
719f1aa4 CH	289	caps.cross_timestamping);
d94ba80e RC	290	}
	291	}
	292
	293	if (0x7fffffff != adjfreq) {
	294	memset(&tx, 0, sizeof(tx));
	295	tx.modes = ADJ_FREQUENCY;
	296	tx.freq = ppb_to_scaled_ppm(adjfreq);
	297	if (clock_adjtime(clkid, &tx)) {
	298	perror("clock_adjtime");
	299	} else {
	300	puts("frequency adjustment okay");
	301	}
	302	}
	303
	304	if (adjtime) {
	305	memset(&tx, 0, sizeof(tx));
	306	tx.modes = ADJ_SETOFFSET;
	307	tx.time.tv_sec = adjtime;
	308	tx.time.tv_usec = 0;
	309	if (clock_adjtime(clkid, &tx) < 0) {
	310	perror("clock_adjtime");
	311	} else {
	312	puts("time shift okay");
	313	}
	314	}
	315
	316	if (gettime) {
	317	if (clock_gettime(clkid, &ts)) {
	318	perror("clock_gettime");
	319	} else {
	320	printf("clock time: %ld.%09ld or %s",
	321	ts.tv_sec, ts.tv_nsec, ctime(&ts.tv_sec));
	322	}
	323	}
	324
	325	if (settime == 1) {
	326	clock_gettime(CLOCK_REALTIME, &ts);
	327	if (clock_settime(clkid, &ts)) {
	328	perror("clock_settime");
	329	} else {
	330	puts("set time okay");
	331	}
	332	}
	333
	334	if (settime == 2) {
	335	clock_gettime(clkid, &ts);
	336	if (clock_settime(CLOCK_REALTIME, &ts)) {
	337	perror("clock_settime");
	338	} else {
	339	puts("set time okay");
	340	}
	341	}
	342
271c83de MR	343	if (settime == 3) {
	344	ts.tv_sec = seconds;
	345	ts.tv_nsec = 0;
	346	if (clock_settime(clkid, &ts)) {
	347	perror("clock_settime");
	348	} else {
	349	puts("set time okay");
	350	}
	351	}
	352
d94ba80e RC	353	if (extts) {
d94ba80e RC	354	memset(&extts_request, 0, sizeof(extts_request));
61950e82	355	extts_request.index = index;
d94ba80e RC	356	extts_request.flags = PTP_ENABLE_FEATURE;
	357	if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) {
	358	perror("PTP_EXTTS_REQUEST");
	359	extts = 0;
	360	} else {
	361	puts("external time stamp request okay");
	362	}
	363	for (; extts; extts--) {
	364	cnt = read(fd, &event, sizeof(event));
	365	if (cnt != sizeof(event)) {
	366	perror("read");
	367	break;
	368	}
	369	printf("event index %u at %lld.%09u\n", event.index,
	370	event.t.sec, event.t.nsec);
	371	fflush(stdout);
	372	}
	373	/* Disable the feature again. */
	374	extts_request.flags = 0;
	375	if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) {
	376	perror("PTP_EXTTS_REQUEST");
	377	}
	378	}
	379
888a3687 RC	380	if (list_pins) {
	381	int n_pins = 0;
	382	if (ioctl(fd, PTP_CLOCK_GETCAPS, &caps)) {
	383	perror("PTP_CLOCK_GETCAPS");
	384	} else {
	385	n_pins = caps.n_pins;
	386	}
	387	for (i = 0; i < n_pins; i++) {
	388	desc.index = i;
	389	if (ioctl(fd, PTP_PIN_GETFUNC, &desc)) {
	390	perror("PTP_PIN_GETFUNC");
	391	break;
	392	}
	393	printf("name %s index %u func %u chan %u\n",
	394	desc.name, desc.index, desc.func, desc.chan);
	395	}
	396	}
	397
d94ba80e RC	398	if (oneshot) {
	399	install_handler(SIGALRM, handle_alarm);
	400	/* Create a timer. */
	401	sigevent.sigev_notify = SIGEV_SIGNAL;
	402	sigevent.sigev_signo = SIGALRM;
	403	if (timer_create(clkid, &sigevent, &timerid)) {
	404	perror("timer_create");
	405	return -1;
	406	}
	407	/* Start the timer. */
	408	memset(&timeout, 0, sizeof(timeout));
	409	timeout.it_value.tv_sec = oneshot;
	410	if (timer_settime(timerid, 0, &timeout, NULL)) {
	411	perror("timer_settime");
	412	return -1;
	413	}
	414	pause();
	415	timer_delete(timerid);
	416	}
	417
	418	if (periodic) {
	419	install_handler(SIGALRM, handle_alarm);
	420	/* Create a timer. */
	421	sigevent.sigev_notify = SIGEV_SIGNAL;
	422	sigevent.sigev_signo = SIGALRM;
	423	if (timer_create(clkid, &sigevent, &timerid)) {
	424	perror("timer_create");
	425	return -1;
	426	}
	427	/* Start the timer. */
	428	memset(&timeout, 0, sizeof(timeout));
	429	timeout.it_interval.tv_sec = periodic;
	430	timeout.it_value.tv_sec = periodic;
	431	if (timer_settime(timerid, 0, &timeout, NULL)) {
	432	perror("timer_settime");
	433	return -1;
	434	}
	435	while (1) {
	436	pause();
	437	}
	438	timer_delete(timerid);
	439	}
	440
	441	if (perout >= 0) {
	442	if (clock_gettime(clkid, &ts)) {
	443	perror("clock_gettime");
	444	return -1;
	445	}
	446	memset(&perout_request, 0, sizeof(perout_request));
61950e82	447	perout_request.index = index;
d94ba80e RC	448	perout_request.start.sec = ts.tv_sec + 2;
	449	perout_request.start.nsec = 0;
	450	perout_request.period.sec = 0;
	451	perout_request.period.nsec = perout;
	452	if (ioctl(fd, PTP_PEROUT_REQUEST, &perout_request)) {
	453	perror("PTP_PEROUT_REQUEST");
	454	} else {
	455	puts("periodic output request okay");
	456	}
	457	}
	458
888a3687 RC	459	if (pin_index >= 0) {
	460	memset(&desc, 0, sizeof(desc));
	461	desc.index = pin_index;
	462	desc.func = pin_func;
	463	desc.chan = index;
	464	if (ioctl(fd, PTP_PIN_SETFUNC, &desc)) {
	465	perror("PTP_PIN_SETFUNC");
	466	} else {
	467	puts("set pin function okay");
	468	}
	469	}
	470
d94ba80e RC	471	if (pps != -1) {
	472	int enable = pps ? 1 : 0;
	473	if (ioctl(fd, PTP_ENABLE_PPS, enable)) {
	474	perror("PTP_ENABLE_PPS");
	475	} else {
	476	puts("pps for system time request okay");
	477	}
	478	}
	479
568ebc59 DZ	480	if (pct_offset) {
	481	if (n_samples <= 0 \|\| n_samples > 25) {
	482	puts("n_samples should be between 1 and 25");
	483	usage(progname);
	484	return -1;
	485	}
	486
	487	sysoff = calloc(1, sizeof(*sysoff));
	488	if (!sysoff) {
	489	perror("calloc");
	490	return -1;
	491	}
	492	sysoff->n_samples = n_samples;
	493
	494	if (ioctl(fd, PTP_SYS_OFFSET, sysoff))
	495	perror("PTP_SYS_OFFSET");
	496	else
	497	puts("system and phc clock time offset request okay");
	498
	499	pct = &sysoff->ts[0];
	500	for (i = 0; i < sysoff->n_samples; i++) {
	501	t1 = pctns(pct+2*i);
	502	tp = pctns(pct+2*i+1);
	503	t2 = pctns(pct+2*i+2);
	504	interval = t2 - t1;
	505	offset = (t2 + t1) / 2 - tp;
	506
6ab0e475	507	printf("system time: %lld.%u\n",
568ebc59	508	(pct+2i)->sec, (pct+2i)->nsec);
6ab0e475	509	printf("phc time: %lld.%u\n",
568ebc59	510	(pct+2i+1)->sec, (pct+2i+1)->nsec);
6ab0e475	511	printf("system time: %lld.%u\n",
568ebc59	512	(pct+2i+2)->sec, (pct+2i+2)->nsec);
4ec54f95 CR	513	printf("system/phc clock time offset is %" PRId64 " ns\n"
4ec54f95 CR	514	"system clock time delay is %" PRId64 " ns\n",
568ebc59 DZ	515	offset, interval);
	516	}
	517
	518	free(sysoff);
	519	}
	520
d94ba80e RC	521	close(fd);
	522	return 0;
	523	}