[linux-2.6-block.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
#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;
	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: %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
d94ba80e RC	21	#include <errno.h>
d94ba80e RC	22	#include <fcntl.h>
4ec54f95	23	#include <inttypes.h>
d94ba80e RC	24	#include <math.h>
	25	#include <signal.h>
	26	#include <stdio.h>
	27	#include <stdlib.h>
	28	#include <string.h>
	29	#include <sys/ioctl.h>
	30	#include <sys/mman.h>
	31	#include <sys/stat.h>
	32	#include <sys/time.h>
	33	#include <sys/timex.h>
	34	#include <sys/types.h>
	35	#include <time.h>
	36	#include <unistd.h>
	37
	38	#include <linux/ptp_clock.h>
	39
	40	#define DEVICE "/dev/ptp0"
	41
	42	#ifndef ADJ_SETOFFSET
	43	#define ADJ_SETOFFSET 0x0100
	44	#endif
	45
	46	#ifndef CLOCK_INVALID
	47	#define CLOCK_INVALID -1
	48	#endif
	49
42e1358e CR	50	/* clock_adjtime is not available in GLIBC < 2.14 */
42e1358e CR	51	#if !__GLIBC_PREREQ(2, 14)
d94ba80e RC	52	#include <sys/syscall.h>
	53	static int clock_adjtime(clockid_t id, struct timex *tx)
	54	{
	55	return syscall(__NR_clock_adjtime, id, tx);
	56	}
42e1358e	57	#endif
d94ba80e RC	58
	59	static clockid_t get_clockid(int fd)
	60	{
	61	#define CLOCKFD 3
	62	#define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) \| CLOCKFD)
	63
	64	return FD_TO_CLOCKID(fd);
	65	}
	66
	67	static void handle_alarm(int s)
	68	{
	69	printf("received signal %d\n", s);
	70	}
	71
	72	static int install_handler(int signum, void (*handler)(int))
	73	{
	74	struct sigaction action;
	75	sigset_t mask;
	76
	77	/* Unblock the signal. */
	78	sigemptyset(&mask);
	79	sigaddset(&mask, signum);
	80	sigprocmask(SIG_UNBLOCK, &mask, NULL);
	81
	82	/* Install the signal handler. */
	83	action.sa_handler = handler;
	84	action.sa_flags = 0;
	85	sigemptyset(&action.sa_mask);
	86	sigaction(signum, &action, NULL);
	87
	88	return 0;
	89	}
	90
	91	static long ppb_to_scaled_ppm(int ppb)
	92	{
	93	/*
	94	* The 'freq' field in the 'struct timex' is in parts per
	95	* million, but with a 16 bit binary fractional field.
	96	* Instead of calculating either one of
	97	*
	98	* scaled_ppm = (ppb / 1000) << 16 [1]
	99	* scaled_ppm = (ppb << 16) / 1000 [2]
	100	*
	101	* we simply use double precision math, in order to avoid the
	102	* truncation in [1] and the possible overflow in [2].
	103	*/
	104	return (long) (ppb * 65.536);
	105	}
	106
568ebc59 DZ	107	static int64_t pctns(struct ptp_clock_time *t)
	108	{
	109	return t->sec * 1000000000LL + t->nsec;
	110	}
	111
d94ba80e RC	112	static void usage(char *progname)
	113	{
	114	fprintf(stderr,
	115	"usage: %s [options]\n"
	116	" -a val request a one-shot alarm after 'val' seconds\n"
	117	" -A val request a periodic alarm every 'val' seconds\n"
	118	" -c query the ptp clock's capabilities\n"
	119	" -d name device to open\n"
	120	" -e val read 'val' external time stamp events\n"
	121	" -f val adjust the ptp clock frequency by 'val' ppb\n"
	122	" -g get the ptp clock time\n"
	123	" -h prints this message\n"
61950e82	124	" -i val index for event/trigger\n"
568ebc59 DZ	125	" -k val measure the time offset between system and phc clock\n"
568ebc59 DZ	126	" for 'val' times (Maximum 25)\n"
888a3687 RC	127	" -l list the current pin configuration\n"
	128	" -L pin,val configure pin index 'pin' with function 'val'\n"
	129	" the channel index is taken from the '-i' option\n"
	130	" 'val' specifies the auxiliary function:\n"
	131	" 0 - none\n"
	132	" 1 - external time stamp\n"
	133	" 2 - periodic output\n"
d94ba80e RC	134	" -p val enable output with a period of 'val' nanoseconds\n"
	135	" -P val enable or disable (val=1\|0) the system clock PPS\n"
	136	" -s set the ptp clock time from the system time\n"
	137	" -S set the system time from the ptp clock time\n"
271c83de MR	138	" -t val shift the ptp clock time by 'val' seconds\n"
271c83de MR	139	" -T val set the ptp clock time to 'val' seconds\n",
d94ba80e RC	140	progname);
	141	}
	142
	143	int main(int argc, char *argv[])
	144	{
	145	struct ptp_clock_caps caps;
	146	struct ptp_extts_event event;
	147	struct ptp_extts_request extts_request;
	148	struct ptp_perout_request perout_request;
888a3687	149	struct ptp_pin_desc desc;
d94ba80e RC	150	struct timespec ts;
	151	struct timex tx;
	152
	153	static timer_t timerid;
	154	struct itimerspec timeout;
	155	struct sigevent sigevent;
	156
568ebc59 DZ	157	struct ptp_clock_time *pct;
	158	struct ptp_sys_offset *sysoff;
	159
	160
d94ba80e	161	char *progname;
568ebc59	162	int i, c, cnt, fd;
d94ba80e RC	163
	164	char *device = DEVICE;
	165	clockid_t clkid;
	166	int adjfreq = 0x7fffffff;
	167	int adjtime = 0;
	168	int capabilities = 0;
	169	int extts = 0;
	170	int gettime = 0;
61950e82	171	int index = 0;
888a3687	172	int list_pins = 0;
d94ba80e	173	int oneshot = 0;
568ebc59 DZ	174	int pct_offset = 0;
568ebc59 DZ	175	int n_samples = 0;
d94ba80e RC	176	int periodic = 0;
d94ba80e RC	177	int perout = -1;
888a3687	178	int pin_index = -1, pin_func;
d94ba80e	179	int pps = -1;
271c83de	180	int seconds = 0;
d94ba80e RC	181	int settime = 0;
d94ba80e RC	182
568ebc59 DZ	183	int64_t t1, t2, tp;
	184	int64_t interval, offset;
	185
d94ba80e RC	186	progname = strrchr(argv[0], '/');
d94ba80e RC	187	progname = progname ? 1+progname : argv[0];
271c83de	188	while (EOF != (c = getopt(argc, argv, "a:A:cd:e:f:ghi:k:lL:p:P:sSt:T:v"))) {
d94ba80e RC	189	switch (c) {
	190	case 'a':
	191	oneshot = atoi(optarg);
	192	break;
	193	case 'A':
	194	periodic = atoi(optarg);
	195	break;
	196	case 'c':
	197	capabilities = 1;
	198	break;
	199	case 'd':
	200	device = optarg;
	201	break;
	202	case 'e':
	203	extts = atoi(optarg);
	204	break;
	205	case 'f':
	206	adjfreq = atoi(optarg);
	207	break;
	208	case 'g':
	209	gettime = 1;
	210	break;
61950e82 SS	211	case 'i':
	212	index = atoi(optarg);
	213	break;
568ebc59 DZ	214	case 'k':
	215	pct_offset = 1;
	216	n_samples = atoi(optarg);
	217	break;
888a3687 RC	218	case 'l':
	219	list_pins = 1;
	220	break;
	221	case 'L':
	222	cnt = sscanf(optarg, "%d,%d", &pin_index, &pin_func);
	223	if (cnt != 2) {
	224	usage(progname);
	225	return -1;
	226	}
	227	break;
d94ba80e RC	228	case 'p':
	229	perout = atoi(optarg);
	230	break;
	231	case 'P':
	232	pps = atoi(optarg);
	233	break;
	234	case 's':
	235	settime = 1;
	236	break;
	237	case 'S':
	238	settime = 2;
	239	break;
	240	case 't':
	241	adjtime = atoi(optarg);
	242	break;
271c83de MR	243	case 'T':
	244	settime = 3;
	245	seconds = atoi(optarg);
	246	break;
d94ba80e RC	247	case 'h':
	248	usage(progname);
	249	return 0;
	250	case '?':
	251	default:
	252	usage(progname);
	253	return -1;
	254	}
	255	}
	256
	257	fd = open(device, O_RDWR);
	258	if (fd < 0) {
	259	fprintf(stderr, "opening %s: %s\n", device, strerror(errno));
	260	return -1;
	261	}
	262
	263	clkid = get_clockid(fd);
	264	if (CLOCK_INVALID == clkid) {
	265	fprintf(stderr, "failed to read clock id\n");
	266	return -1;
	267	}
	268
	269	if (capabilities) {
	270	if (ioctl(fd, PTP_CLOCK_GETCAPS, &caps)) {
	271	perror("PTP_CLOCK_GETCAPS");
	272	} else {
	273	printf("capabilities:\n"
	274	" %d maximum frequency adjustment (ppb)\n"
	275	" %d programmable alarms\n"
	276	" %d external time stamp channels\n"
	277	" %d programmable periodic signals\n"
888a3687 RC	278	" %d pulse per second\n"
888a3687 RC	279	" %d programmable pins\n",
d94ba80e RC	280	caps.max_adj,
	281	caps.n_alarm,
	282	caps.n_ext_ts,
	283	caps.n_per_out,
888a3687 RC	284	caps.pps,
888a3687 RC	285	caps.n_pins);
d94ba80e RC	286	}
	287	}
	288
	289	if (0x7fffffff != adjfreq) {
	290	memset(&tx, 0, sizeof(tx));
	291	tx.modes = ADJ_FREQUENCY;
	292	tx.freq = ppb_to_scaled_ppm(adjfreq);
	293	if (clock_adjtime(clkid, &tx)) {
	294	perror("clock_adjtime");
	295	} else {
	296	puts("frequency adjustment okay");
	297	}
	298	}
	299
	300	if (adjtime) {
	301	memset(&tx, 0, sizeof(tx));
	302	tx.modes = ADJ_SETOFFSET;
	303	tx.time.tv_sec = adjtime;
	304	tx.time.tv_usec = 0;
	305	if (clock_adjtime(clkid, &tx) < 0) {
	306	perror("clock_adjtime");
	307	} else {
	308	puts("time shift okay");
	309	}
	310	}
	311
	312	if (gettime) {
	313	if (clock_gettime(clkid, &ts)) {
	314	perror("clock_gettime");
	315	} else {
	316	printf("clock time: %ld.%09ld or %s",
	317	ts.tv_sec, ts.tv_nsec, ctime(&ts.tv_sec));
	318	}
	319	}
	320
	321	if (settime == 1) {
	322	clock_gettime(CLOCK_REALTIME, &ts);
	323	if (clock_settime(clkid, &ts)) {
	324	perror("clock_settime");
	325	} else {
	326	puts("set time okay");
	327	}
	328	}
	329
	330	if (settime == 2) {
	331	clock_gettime(clkid, &ts);
	332	if (clock_settime(CLOCK_REALTIME, &ts)) {
	333	perror("clock_settime");
	334	} else {
	335	puts("set time okay");
	336	}
	337	}
	338
271c83de MR	339	if (settime == 3) {
	340	ts.tv_sec = seconds;
	341	ts.tv_nsec = 0;
	342	if (clock_settime(clkid, &ts)) {
	343	perror("clock_settime");
	344	} else {
	345	puts("set time okay");
	346	}
	347	}
	348
d94ba80e RC	349	if (extts) {
d94ba80e RC	350	memset(&extts_request, 0, sizeof(extts_request));
61950e82	351	extts_request.index = index;
d94ba80e RC	352	extts_request.flags = PTP_ENABLE_FEATURE;
	353	if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) {
	354	perror("PTP_EXTTS_REQUEST");
	355	extts = 0;
	356	} else {
	357	puts("external time stamp request okay");
	358	}
	359	for (; extts; extts--) {
	360	cnt = read(fd, &event, sizeof(event));
	361	if (cnt != sizeof(event)) {
	362	perror("read");
	363	break;
	364	}
	365	printf("event index %u at %lld.%09u\n", event.index,
	366	event.t.sec, event.t.nsec);
	367	fflush(stdout);
	368	}
	369	/* Disable the feature again. */
	370	extts_request.flags = 0;
	371	if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) {
	372	perror("PTP_EXTTS_REQUEST");
	373	}
	374	}
	375
888a3687 RC	376	if (list_pins) {
	377	int n_pins = 0;
	378	if (ioctl(fd, PTP_CLOCK_GETCAPS, &caps)) {
	379	perror("PTP_CLOCK_GETCAPS");
	380	} else {
	381	n_pins = caps.n_pins;
	382	}
	383	for (i = 0; i < n_pins; i++) {
	384	desc.index = i;
	385	if (ioctl(fd, PTP_PIN_GETFUNC, &desc)) {
	386	perror("PTP_PIN_GETFUNC");
	387	break;
	388	}
	389	printf("name %s index %u func %u chan %u\n",
	390	desc.name, desc.index, desc.func, desc.chan);
	391	}
	392	}
	393
d94ba80e RC	394	if (oneshot) {
	395	install_handler(SIGALRM, handle_alarm);
	396	/* Create a timer. */
	397	sigevent.sigev_notify = SIGEV_SIGNAL;
	398	sigevent.sigev_signo = SIGALRM;
	399	if (timer_create(clkid, &sigevent, &timerid)) {
	400	perror("timer_create");
	401	return -1;
	402	}
	403	/* Start the timer. */
	404	memset(&timeout, 0, sizeof(timeout));
	405	timeout.it_value.tv_sec = oneshot;
	406	if (timer_settime(timerid, 0, &timeout, NULL)) {
	407	perror("timer_settime");
	408	return -1;
	409	}
	410	pause();
	411	timer_delete(timerid);
	412	}
	413
	414	if (periodic) {
	415	install_handler(SIGALRM, handle_alarm);
	416	/* Create a timer. */
	417	sigevent.sigev_notify = SIGEV_SIGNAL;
	418	sigevent.sigev_signo = SIGALRM;
	419	if (timer_create(clkid, &sigevent, &timerid)) {
	420	perror("timer_create");
	421	return -1;
	422	}
	423	/* Start the timer. */
	424	memset(&timeout, 0, sizeof(timeout));
	425	timeout.it_interval.tv_sec = periodic;
	426	timeout.it_value.tv_sec = periodic;
	427	if (timer_settime(timerid, 0, &timeout, NULL)) {
	428	perror("timer_settime");
	429	return -1;
	430	}
	431	while (1) {
	432	pause();
	433	}
	434	timer_delete(timerid);
	435	}
	436
	437	if (perout >= 0) {
	438	if (clock_gettime(clkid, &ts)) {
	439	perror("clock_gettime");
	440	return -1;
	441	}
	442	memset(&perout_request, 0, sizeof(perout_request));
61950e82	443	perout_request.index = index;
d94ba80e RC	444	perout_request.start.sec = ts.tv_sec + 2;
	445	perout_request.start.nsec = 0;
	446	perout_request.period.sec = 0;
	447	perout_request.period.nsec = perout;
	448	if (ioctl(fd, PTP_PEROUT_REQUEST, &perout_request)) {
	449	perror("PTP_PEROUT_REQUEST");
	450	} else {
	451	puts("periodic output request okay");
	452	}
	453	}
	454
888a3687 RC	455	if (pin_index >= 0) {
	456	memset(&desc, 0, sizeof(desc));
	457	desc.index = pin_index;
	458	desc.func = pin_func;
	459	desc.chan = index;
	460	if (ioctl(fd, PTP_PIN_SETFUNC, &desc)) {
	461	perror("PTP_PIN_SETFUNC");
	462	} else {
	463	puts("set pin function okay");
	464	}
	465	}
	466
d94ba80e RC	467	if (pps != -1) {
	468	int enable = pps ? 1 : 0;
	469	if (ioctl(fd, PTP_ENABLE_PPS, enable)) {
	470	perror("PTP_ENABLE_PPS");
	471	} else {
	472	puts("pps for system time request okay");
	473	}
	474	}
	475
568ebc59 DZ	476	if (pct_offset) {
	477	if (n_samples <= 0 \|\| n_samples > 25) {
	478	puts("n_samples should be between 1 and 25");
	479	usage(progname);
	480	return -1;
	481	}
	482
	483	sysoff = calloc(1, sizeof(*sysoff));
	484	if (!sysoff) {
	485	perror("calloc");
	486	return -1;
	487	}
	488	sysoff->n_samples = n_samples;
	489
	490	if (ioctl(fd, PTP_SYS_OFFSET, sysoff))
	491	perror("PTP_SYS_OFFSET");
	492	else
	493	puts("system and phc clock time offset request okay");
	494
	495	pct = &sysoff->ts[0];
	496	for (i = 0; i < sysoff->n_samples; i++) {
	497	t1 = pctns(pct+2*i);
	498	tp = pctns(pct+2*i+1);
	499	t2 = pctns(pct+2*i+2);
	500	interval = t2 - t1;
	501	offset = (t2 + t1) / 2 - tp;
	502
6ab0e475	503	printf("system time: %lld.%u\n",
568ebc59	504	(pct+2i)->sec, (pct+2i)->nsec);
6ab0e475	505	printf("phc time: %lld.%u\n",
568ebc59	506	(pct+2i+1)->sec, (pct+2i+1)->nsec);
6ab0e475	507	printf("system time: %lld.%u\n",
568ebc59	508	(pct+2i+2)->sec, (pct+2i+2)->nsec);
4ec54f95 CR	509	printf("system/phc clock time offset is %" PRId64 " ns\n"
4ec54f95 CR	510	"system clock time delay is %" PRId64 " ns\n",
568ebc59 DZ	511	offset, interval);
	512	}
	513
	514	free(sysoff);
	515	}
	516
d94ba80e RC	517	close(fd);
	518	return 0;
	519	}