~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/tools/testing/selftests/ptp/testptp.c

Version: ~ [ linux-5.2-rc1 ] ~ [ linux-5.1.2 ] ~ [ linux-5.0.16 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.43 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.119 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.176 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.179 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.139 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.67 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 #define _GNU_SOURCE
 21 #define __SANE_USERSPACE_TYPES__        /* For PPC64, to get LL64 types */
 22 #include <errno.h>
 23 #include <fcntl.h>
 24 #include <inttypes.h>
 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 
 51 /* clock_adjtime is not available in GLIBC < 2.14 */
 52 #if !__GLIBC_PREREQ(2, 14)
 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 }
 58 #endif
 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 
108 static int64_t pctns(struct ptp_clock_time *t)
109 {
110         return t->sec * 1000000000LL + t->nsec;
111 }
112 
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"
125                 " -i val     index for event/trigger\n"
126                 " -k val     measure the time offset between system and phc clock\n"
127                 "            for 'val' times (Maximum 25)\n"
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"
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"
139                 " -t val     shift the ptp clock time by 'val' seconds\n"
140                 " -T val     set the ptp clock time to 'val' seconds\n",
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;
150         struct ptp_pin_desc desc;
151         struct timespec ts;
152         struct timex tx;
153 
154         static timer_t timerid;
155         struct itimerspec timeout;
156         struct sigevent sigevent;
157 
158         struct ptp_clock_time *pct;
159         struct ptp_sys_offset *sysoff;
160 
161 
162         char *progname;
163         unsigned int i;
164         int c, cnt, fd;
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;
173         int index = 0;
174         int list_pins = 0;
175         int oneshot = 0;
176         int pct_offset = 0;
177         int n_samples = 0;
178         int periodic = 0;
179         int perout = -1;
180         int pin_index = -1, pin_func;
181         int pps = -1;
182         int seconds = 0;
183         int settime = 0;
184 
185         int64_t t1, t2, tp;
186         int64_t interval, offset;
187 
188         progname = strrchr(argv[0], '/');
189         progname = progname ? 1+progname : argv[0];
190         while (EOF != (c = getopt(argc, argv, "a:A:cd:e:f:ghi:k:lL:p:P:sSt:T:v"))) {
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;
213                 case 'i':
214                         index = atoi(optarg);
215                         break;
216                 case 'k':
217                         pct_offset = 1;
218                         n_samples = atoi(optarg);
219                         break;
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;
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;
245                 case 'T':
246                         settime = 3;
247                         seconds = atoi(optarg);
248                         break;
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"
280                                "  %d pulse per second\n"
281                                "  %d programmable pins\n"
282                                "  %d cross timestamping\n",
283                                caps.max_adj,
284                                caps.n_alarm,
285                                caps.n_ext_ts,
286                                caps.n_per_out,
287                                caps.pps,
288                                caps.n_pins,
289                                caps.cross_timestamping);
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 
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 
353         if (extts) {
354                 memset(&extts_request, 0, sizeof(extts_request));
355                 extts_request.index = index;
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 
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 
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));
447                 perout_request.index = index;
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 
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 
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 
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 
507                         printf("system time: %lld.%u\n",
508                                 (pct+2*i)->sec, (pct+2*i)->nsec);
509                         printf("phc    time: %lld.%u\n",
510                                 (pct+2*i+1)->sec, (pct+2*i+1)->nsec);
511                         printf("system time: %lld.%u\n",
512                                 (pct+2*i+2)->sec, (pct+2*i+2)->nsec);
513                         printf("system/phc clock time offset is %" PRId64 " ns\n"
514                                "system     clock time delay  is %" PRId64 " ns\n",
515                                 offset, interval);
516                 }
517 
518                 free(sysoff);
519         }
520 
521         close(fd);
522         return 0;
523 }
524 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp