utils/pps-tools/patches/001-source.patch

   1 diff --git a/Makefile b/Makefile
   2 new file mode 100644
   3 index 0000000..a2660a2
   4 --- /dev/null
   5 +++ b/Makefile
   6 @@ -0,0 +1,27 @@
   7 +TARGETS = ppstest ppsctl
   8 +
   9 +CFLAGS += -Wall -O2 -D_GNU_SOURCE
  10 +CFLAGS += -I .
  11 +CFLAGS += -ggdb
  12 +
  13 +# -- Actions section ----------------------------------------------------------
  14 +
  15 +.PHONY : all depend dep
  16 +
  17 +all : .depend $(TARGETS)
  18 +
  19 +.depend depend dep :
  20 +       $(CC) $(CFLAGS) -M $(TARGETS:=.c) > .depend
  21 +
  22 +ifeq (.depend,$(wildcard .depend))
  23 +include .depend
  24 +endif
  25 +
  26 +
  27 +# -- Clean section ------------------------------------------------------------
  28 +
  29 +.PHONY : clean
  30 +
  31 +clean :
  32 +       rm -f *.o *~ core .depend
  33 +       rm -f ${TARGETS}
  34 diff --git a/ppsctl.c b/ppsctl.c
  35 new file mode 100644
  36 index 0000000..83fd08a
  37 --- /dev/null
  38 +++ b/ppsctl.c
  39 @@ -0,0 +1,62 @@
  40 +#include <stdio.h>
  41 +#include <unistd.h>
  42 +#include <stdlib.h>
  43 +#include <errno.h>
  44 +#include <sys/ioctl.h>
  45 +#include <sys/types.h>
  46 +#include <sys/stat.h>
  47 +#include <fcntl.h>
  48 +#include <string.h>
  49 +#include <linux/serial.h>
  50 +
  51 +void usage(char *name)
  52 +{
  53 +       fprintf(stderr, "usage: %s <ttyS> [enable|disable]\n", name);
  54 +
  55 +       exit(EXIT_FAILURE);
  56 +}
  57 +
  58 +int main(int argc, char *argv[])
  59 +{
  60 +       int fd;
  61 +       int ret;
  62 +       struct serial_struct ss;
  63 +
  64 +       if (argc < 2)
  65 +               usage(argv[0]);
  66 +
  67 +       fd = open(argv[1], O_RDWR);
  68 +       if (fd < 0) {
  69 +               perror("open");
  70 +               exit(EXIT_FAILURE);
  71 +       }
  72 +
  73 +       ret = ioctl(fd, TIOCGSERIAL, &ss);
  74 +       if (ret < 0) {
  75 +               perror("ioctl(TIOCGSERIAL)");
  76 +               exit(EXIT_FAILURE);
  77 +       }
  78 +
  79 +       if (argc < 3) {         /* just read PPS status */
  80 +               printf("PPS is %sabled\n",
  81 +                      ss.flags & ASYNC_HARDPPS_CD ? "en" : "dis");
  82 +               exit(EXIT_SUCCESS);
  83 +       }
  84 +
  85 +       if (argv[2][0] == 'e' || argv[2][0] == '1')
  86 +               ss.flags |= ASYNC_HARDPPS_CD;
  87 +       else if (argv[2][0] == 'd' || argv[2][0] == '0')
  88 +               ss.flags &= ~ASYNC_HARDPPS_CD;
  89 +       else {
  90 +               fprintf(stderr, "invalid state argument \"%s\"\n", argv[2]);
  91 +               exit(EXIT_FAILURE);
  92 +       }
  93 +
  94 +       ret = ioctl(fd, TIOCSSERIAL, &ss);
  95 +       if (ret < 0) {
  96 +               perror("ioctl(TIOCSSERIAL)");
  97 +               exit(EXIT_FAILURE);
  98 +       }
  99 +
 100 +       return 0;
 101 +}
 102 diff --git a/ppsfind b/ppsfind
 103 new file mode 100755
 104 index 0000000..93c0e17
 105 --- /dev/null
 106 +++ b/ppsfind
 107 @@ -0,0 +1,17 @@
 108 +#!/bin/sh
 109 +
 110 +SYS="/sys/class/pps/"
 111 +
 112 +if [ $# -lt 1 ] ; then
 113 +       echo "usage: ppsfind <name>" >&2
 114 +       exit 1
 115 +fi
 116 +
 117 +for d in $(ls $SYS) ; do
 118 +       if grep $1 $SYS/$d/name >& /dev/null || \
 119 +          grep $1 $SYS/$d/path >& /dev/null ; then
 120 +               echo "$d: name=$(cat $SYS/$d/name) path=$(cat $SYS/$d/path)"
 121 +       fi
 122 +done
 123 +
 124 +exit 0
 125 diff --git a/ppstest.c b/ppstest.c
 126 new file mode 100644
 127 index 0000000..d125ffa
 128 --- /dev/null
 129 +++ b/ppstest.c
 130 @@ -0,0 +1,151 @@
 131 +#include <stdio.h>
 132 +#include <stdlib.h>
 133 +#include <unistd.h>
 134 +#include <errno.h>
 135 +#include <string.h>
 136 +#include <sys/types.h>
 137 +#include <sys/stat.h>
 138 +#include <fcntl.h>
 139 +
 140 +#include <timepps.h>
 141 +
 142 +int find_source(char *path, pps_handle_t *handle, int *avail_mode)
 143 +{
 144 +       pps_params_t params;
 145 +       int ret;
 146 +
 147 +       printf("trying PPS source \"%s\"\n", path);
 148 +
 149 +       /* Try to find the source by using the supplied "path" name */
 150 +       ret = open(path, O_RDWR);
 151 +       if (ret < 0) {
 152 +               fprintf(stderr, "unable to open device \"%s\" (%m)\n", path);
 153 +               return ret;
 154 +       }
 155 +
 156 +       /* Open the PPS source (and check the file descriptor) */
 157 +       ret = time_pps_create(ret, handle);
 158 +       if (ret < 0) {
 159 +               fprintf(stderr, "cannot create a PPS source from device "
 160 +                               "\"%s\" (%m)\n", path);
 161 +               return -1;
 162 +       }
 163 +       printf("found PPS source \"%s\"\n", path);
 164 +
 165 +       /* Find out what features are supported */
 166 +       ret = time_pps_getcap(*handle, avail_mode);
 167 +       if (ret < 0) {
 168 +               fprintf(stderr, "cannot get capabilities (%m)\n");
 169 +               return -1;
 170 +       }
 171 +       if ((*avail_mode & PPS_CAPTUREASSERT) == 0) {
 172 +               fprintf(stderr, "cannot CAPTUREASSERT\n");
 173 +               return -1;
 174 +       }
 175 +       if ((*avail_mode & PPS_OFFSETASSERT) == 0) {
 176 +               fprintf(stderr, "cannot OFFSETASSERT\n");
 177 +               return -1;
 178 +       }
 179 +
 180 +       /* Capture assert timestamps, and compensate for a 675 nsec
 181 +        * propagation delay */
 182 +       ret = time_pps_getparams(*handle, &params);
 183 +       if (ret < 0) {
 184 +               fprintf(stderr, "cannot get parameters (%m)\n");
 185 +               return -1;
 186 +       }
 187 +       params.assert_offset.tv_sec = 0;
 188 +       params.assert_offset.tv_nsec = 675;
 189 +       params.mode |= PPS_CAPTUREASSERT | PPS_OFFSETASSERT;
 190 +       ret = time_pps_setparams(*handle, &params);
 191 +       if (ret < 0) {
 192 +               fprintf(stderr, "cannot set parameters (%m)\n");
 193 +               return -1;
 194 +       }
 195 +
 196 +       return 0;
 197 +}
 198 +
 199 +int fetch_source(int i, pps_handle_t *handle, int *avail_mode)
 200 +{
 201 +       struct timespec timeout;
 202 +       pps_info_t infobuf;
 203 +       int ret;
 204 +
 205 +       /* create a zero-valued timeout */
 206 +       timeout.tv_sec = 3;
 207 +       timeout.tv_nsec = 0;
 208 +
 209 +retry:
 210 +       if (*avail_mode & PPS_CANWAIT) /* waits for the next event */
 211 +               ret = time_pps_fetch(*handle, PPS_TSFMT_TSPEC, &infobuf,
 212 +                                  &timeout);
 213 +       else {
 214 +               sleep(1);
 215 +               ret = time_pps_fetch(*handle, PPS_TSFMT_TSPEC, &infobuf,
 216 +                                  &timeout);
 217 +       }
 218 +       if (ret < 0) {
 219 +               if (ret == -EINTR) {
 220 +                       fprintf(stderr, "time_pps_fetch() got a signal!\n");
 221 +                       goto retry;
 222 +               }
 223 +
 224 +               fprintf(stderr, "time_pps_fetch() error %d (%m)\n", ret);
 225 +               return -1;
 226 +       }
 227 +
 228 +       printf("source %d - "
 229 +              "assert %ld.%09ld, sequence: %ld - "
 230 +              "clear  %ld.%09ld, sequence: %ld\n",
 231 +              i,
 232 +              infobuf.assert_timestamp.tv_sec,
 233 +              infobuf.assert_timestamp.tv_nsec,
 234 +              infobuf.assert_sequence,
 235 +              infobuf.clear_timestamp.tv_sec,
 236 +              infobuf.clear_timestamp.tv_nsec, infobuf.clear_sequence);
 237 +
 238 +       return 0;
 239 +}
 240 +
 241 +void usage(char *name)
 242 +{
 243 +       fprintf(stderr, "usage: %s <ppsdev> [<ppsdev> ...]\n", name);
 244 +       exit(EXIT_FAILURE);
 245 +}
 246 +
 247 +int main(int argc, char *argv[])
 248 +{
 249 +       int num;
 250 +       pps_handle_t handle[4];
 251 +       int avail_mode[4];
 252 +       int i = 0;
 253 +       int ret;
 254 +
 255 +       /* Check the command line */
 256 +       if (argc < 2)
 257 +               usage(argv[0]);
 258 +
 259 +       for (i = 1; i < argc && i <= 4; i++) {
 260 +               ret = find_source(argv[i], &handle[i - 1], &avail_mode[i - 1]);
 261 +               if (ret < 0)
 262 +                       exit(EXIT_FAILURE);
 263 +       }
 264 +
 265 +       num = i - 1;
 266 +       printf("ok, found %d source(s), now start fetching data...\n", num);
 267 +
 268 +       /* loop, printing the most recent timestamp every second or so */
 269 +       while (1) {
 270 +               for (i = 0; i < num; i++) {
 271 +                       ret = fetch_source(i, &handle[i], &avail_mode[i]);
 272 +                       if (ret < 0 && errno != ETIMEDOUT)
 273 +                               exit(EXIT_FAILURE);
 274 +               }
 275 +       }
 276 +
 277 +       for (; i >= 0; i--)
 278 +               time_pps_destroy(handle[i]);
 279 +
 280 +       return 0;
 281 +}
 282 diff --git a/timepps.h b/timepps.h
 283 new file mode 100644
 284 index 0000000..28ebf4c
 285 --- /dev/null
 286 +++ b/timepps.h
 287 @@ -0,0 +1,193 @@
 288 +/*
 289 + * timepps.h -- PPS API main header
 290 + *
 291 + * Copyright (C) 2005-2007   Rodolfo Giometti <giometti@linux.it>
 292 + *
 293 + *   This program is free software; you can redistribute it and/or modify
 294 + *   it under the terms of the GNU General Public License as published by
 295 + *   the Free Software Foundation; either version 2 of the License, or
 296 + *   (at your option) any later version.
 297 + *
 298 + *   This program is distributed in the hope that it will be useful,
 299 + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 300 + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 301 + *   GNU General Public License for more details.
 302 + *
 303 + *   You should have received a copy of the GNU General Public License
 304 + *   along with this program; if not, write to the Free Software
 305 + *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 306 + */
 307 +
 308 +#ifndef _SYS_TIMEPPS_H_
 309 +#define _SYS_TIMEPPS_H_
 310 +
 311 +#include <sys/syscall.h>
 312 +#include <unistd.h>
 313 +#include <errno.h>
 314 +#include <linux/pps.h>
 315 +
 316 +/*
 317 + * New data structures
 318 + */
 319 +
 320 +struct ntp_fp {
 321 +       unsigned int integral;
 322 +       unsigned int fractional;
 323 +};
 324 +
 325 +union pps_timeu {
 326 +       struct timespec tspec;
 327 +       struct ntp_fp ntpfp;
 328 +       unsigned long longpad[3];
 329 +};
 330 +
 331 +struct pps_info {
 332 +       unsigned long assert_sequence;  /* seq. num. of assert event */
 333 +       unsigned long clear_sequence;   /* seq. num. of clear event */
 334 +       union pps_timeu assert_tu;      /* time of assert event */
 335 +       union pps_timeu clear_tu;       /* time of clear event */
 336 +       int current_mode;               /* current mode bits */
 337 +};
 338 +
 339 +struct pps_params {
 340 +       int api_version;                /* API version # */
 341 +       int mode;                       /* mode bits */
 342 +       union pps_timeu assert_off_tu;  /* offset compensation for assert */
 343 +       union pps_timeu clear_off_tu;   /* offset compensation for clear */
 344 +};
 345 +
 346 +typedef int pps_handle_t;              /* represents a PPS source */
 347 +typedef unsigned long pps_seq_t;       /* sequence number */
 348 +typedef struct ntp_fp ntp_fp_t;                /* NTP-compatible time stamp */
 349 +typedef union pps_timeu pps_timeu_t;   /* generic data type for time stamps */
 350 +typedef struct pps_info pps_info_t;
 351 +typedef struct pps_params pps_params_t;
 352 +
 353 +#define assert_timestamp        assert_tu.tspec
 354 +#define clear_timestamp         clear_tu.tspec
 355 +
 356 +#define assert_timestamp_ntpfp  assert_tu.ntpfp
 357 +#define clear_timestamp_ntpfp   clear_tu.ntpfp
 358 +
 359 +#define assert_offset          assert_off_tu.tspec
 360 +#define clear_offset           clear_off_tu.tspec
 361 +
 362 +#define assert_offset_ntpfp     assert_off_tu.ntpfp
 363 +#define clear_offset_ntpfp      clear_off_tu.ntpfp
 364 +
 365 +/*
 366 + * The PPS API
 367 + */
 368 +
 369 +static __inline int time_pps_create(int source, pps_handle_t *handle)
 370 +{
 371 +       int ret;
 372 +
 373 +       if (!handle) {
 374 +               errno = EINVAL;
 375 +               return -1;
 376 +       }
 377 +
 378 +       /* First we check if current device is a PPS valid PPS one...
 379 +        */
 380 +       ret = ioctl(source, PPS_CHECK);
 381 +       if (ret) {
 382 +               errno = EOPNOTSUPP;
 383 +               return -1;
 384 +       }
 385 +
 386 +       /* ... then since in LinuxPPS there are no differences between a
 387 +        * "PPS source" and a "PPS handle", we simply return the same value.
 388 +        */
 389 +       *handle = source;
 390 +
 391 +       return 0;
 392 +}
 393 +
 394 +static __inline int time_pps_destroy(pps_handle_t handle)
 395 +{
 396 +       return close(handle);
 397 +}
 398 +
 399 +static __inline int time_pps_getparams(pps_handle_t handle,
 400 +                                       pps_params_t *ppsparams)
 401 +{
 402 +       int ret;
 403 +       struct pps_kparams __ppsparams;
 404 +
 405 +       ret = ioctl(handle, PPS_GETPARAMS, &__ppsparams);
 406 +
 407 +       ppsparams->api_version = __ppsparams.api_version;
 408 +       ppsparams->mode = __ppsparams.mode;
 409 +       ppsparams->assert_off_tu.tspec.tv_sec = __ppsparams.assert_off_tu.sec;
 410 +       ppsparams->assert_off_tu.tspec.tv_nsec = __ppsparams.assert_off_tu.nsec;
 411 +       ppsparams->clear_off_tu.tspec.tv_sec = __ppsparams.clear_off_tu.sec;
 412 +       ppsparams->clear_off_tu.tspec.tv_nsec = __ppsparams.clear_off_tu.nsec;
 413 +
 414 +       return ret;
 415 +}
 416 +
 417 +static __inline int time_pps_setparams(pps_handle_t handle,
 418 +                                       const pps_params_t *ppsparams)
 419 +{
 420 +       struct pps_kparams __ppsparams;
 421 +
 422 +       __ppsparams.api_version = ppsparams->api_version;
 423 +       __ppsparams.mode = ppsparams->mode;
 424 +       __ppsparams.assert_off_tu.sec = ppsparams->assert_off_tu.tspec.tv_sec;
 425 +       __ppsparams.assert_off_tu.nsec = ppsparams->assert_off_tu.tspec.tv_nsec;
 426 +       __ppsparams.clear_off_tu.sec = ppsparams->clear_off_tu.tspec.tv_sec;
 427 +       __ppsparams.clear_off_tu.nsec = ppsparams->clear_off_tu.tspec.tv_nsec;
 428 +
 429 +       return ioctl(handle, PPS_SETPARAMS, &__ppsparams);
 430 +}
 431 +
 432 +/* Get capabilities for handle */
 433 +static __inline int time_pps_getcap(pps_handle_t handle, int *mode)
 434 +{
 435 +       return ioctl(handle, PPS_GETCAP, mode);
 436 +}
 437 +
 438 +static __inline int time_pps_fetch(pps_handle_t handle, const int tsformat,
 439 +                                       pps_info_t *ppsinfobuf,
 440 +                                       const struct timespec *timeout)
 441 +{
 442 +       struct pps_fdata __fdata;
 443 +       int ret;
 444 +
 445 +       /* Sanity checks */
 446 +       if (tsformat != PPS_TSFMT_TSPEC) {
 447 +               errno = EINVAL;
 448 +               return -1;
 449 +       }
 450 +
 451 +       if (timeout) {
 452 +               __fdata.timeout.sec = timeout->tv_sec;
 453 +               __fdata.timeout.nsec = timeout->tv_nsec;
 454 +               __fdata.timeout.flags = ~PPS_TIME_INVALID;
 455 +       } else
 456 +               __fdata.timeout.flags = PPS_TIME_INVALID;
 457 +
 458 +       ret = ioctl(handle, PPS_FETCH, &__fdata);
 459 +
 460 +       ppsinfobuf->assert_sequence = __fdata.info.assert_sequence;
 461 +       ppsinfobuf->clear_sequence = __fdata.info.clear_sequence;
 462 +       ppsinfobuf->assert_tu.tspec.tv_sec = __fdata.info.assert_tu.sec;
 463 +       ppsinfobuf->assert_tu.tspec.tv_nsec = __fdata.info.assert_tu.nsec;
 464 +       ppsinfobuf->clear_tu.tspec.tv_sec = __fdata.info.clear_tu.sec;
 465 +       ppsinfobuf->clear_tu.tspec.tv_nsec = __fdata.info.clear_tu.nsec;
 466 +       ppsinfobuf->current_mode = __fdata.info.current_mode;
 467 +
 468 +       return ret;
 469 +}
 470 +
 471 +static __inline int time_pps_kcbind(pps_handle_t handle,
 472 +                                       const int kernel_consumer,
 473 +                                       const int edge, const int tsformat)
 474 +{
 475 +       /* LinuxPPS doesn't implement kernel consumer feature */
 476 +       errno = EOPNOTSUPP;
 477 +       return -1;
 478 +}
 479 +
 480 +#endif                         /* _SYS_TIMEPPS_H_ */