[mirror_ubuntu-zesty-kernel.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.
 */
#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

/* When glibc offers the syscall, this will go away. */
#include <sys/syscall.h>
static int clock_adjtime(clockid_t id, struct timex *tx)
{
	return syscall(__NR_clock_adjtime, id, tx);
}

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;
	int i, 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",
			       caps.max_adj,
			       caps.n_alarm,
			       caps.n_ext_ts,
			       caps.n_per_out,
			       caps.pps,
			       caps.n_pins);
		}
	}

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