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07070100000000000081A4000000000000000000000001619B4B610000002D000000000000000000000000000000000000002800000000pps-tools-0.0.0+git.20211122/.gitignore.depend
*.o
ppsctl
ppstest
ppswatch
ppsldisc
07070100000001000081A4000000000000000000000001619B4B6100004643000000000000000000000000000000000000002500000000pps-tools-0.0.0+git.20211122/COPYING		    GNU GENERAL PUBLIC LICENSE
		       Version 2, June 1991

Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

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This General Public License does not permit incorporating your program into
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consider it more useful to permit linking proprietary applications with the
library.  If this is what you want to do, use the GNU Lesser General
Public License instead of this License.
07070100000002000081A4000000000000000000000001619B4B61000002CB000000000000000000000000000000000000002600000000pps-tools-0.0.0+git.20211122/MakefileTARGETS = ppstest ppsctl ppswatch ppsldisc

CFLAGS += -Wall -O2 -D_GNU_SOURCE
CFLAGS += -ggdb
CFLAGS += -fPIC
ifdef SYSROOT
CFLAGS += --sysroot $(SYSROOT)
endif

LDLIBS += -lm

# -- Actions section --

.PHONY : all depend dep

all : .depend $(TARGETS)

.depend depend dep :
	$(CC) $(CFLAGS) -M $(TARGETS:=.c) > .depend

ifeq (.depend,$(wildcard .depend))
include .depend
endif

install : all
	install -D -m 755 -t $(DESTDIR)/usr/bin ppsfind $(TARGETS)
	install -D -m 644 -t $(DESTDIR)/usr/include/sys timepps.h

uninstall :
	for f in $(TARGETS); do rm $(DESTDIR)/usr/bin/$$f; done
	rm $(DESTDIR)/usr/include/sys/timepps.h

# -- Clean section --

.PHONY : clean

clean :
	rm -f *.o *~ core .depend
	rm -f ${TARGETS}
07070100000003000081A4000000000000000000000001619B4B6100000103000000000000000000000000000000000000002700000000pps-tools-0.0.0+git.20211122/README.md# Tools for LinuxPPS

You can read more about LinuxPPS [here](http://linuxpps.org)

## Building

```sh
make
```

## Cross-compiling

Example for Linux ARM

```sh
export CC=<CrossCompilerBinPath>/arm-linux-gnueabihf-gcc
export SYSROOT=<PathToSysroot>
make
```
07070100000004000081A4000000000000000000000001619B4B61000015BC000000000000000000000000000000000000002600000000pps-tools-0.0.0+git.20211122/ppsctl.c/*
 * ppsctl.c -- control tool for PPS
 *
 * Copyright (C) 2009-2011   Alexander Gordeev <alex@gordick.net>
 *
 *   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.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <sys/timex.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <getopt.h>

#include "timepps.h"

/* variables for the command-line operations
 * 0 means no operation
 * 1 mean enable
 * 2 means disable
 */
static int do_bind = 0;		/* are we binding or unbinding? */
static int do_setflags = 0;	/* should we manipulate kernel NTP PPS flags? */
static int opt_edge = PPS_CAPTURECLEAR;	/* which edge to use? */
static char *device;

static int find_source(char *path, pps_handle_t *handle, int *avail_mode)
{
	int ret;

printf("trying PPS source \"%s\"\n", path);

/* Try to find the source by using the supplied "path" name */
	ret = open(path, O_RDWR);
	if (ret < 0) {
		fprintf(stderr, "unable to open device \"%s\" (%m)\n", path);
		return ret;
	}

/* Open the PPS source (and check the file descriptor) */
	ret = time_pps_create(ret, handle);
	if (ret < 0) {
		fprintf(stderr, "cannot create a PPS source from device "
				"\"%s\" (%m)\n", path);
		return -1;
	}
	printf("found PPS source \"%s\"\n", path);

/* Find out what features are supported */
	ret = time_pps_getcap(*handle, avail_mode);
	if (ret < 0) {
		fprintf(stderr, "cannot get capabilities (%m)\n");
		return -1;
	}
	if ((*avail_mode & PPS_CAPTUREASSERT) == 0) {
		fprintf(stderr, "cannot CAPTUREASSERT\n");
		return -1;
	}

return 0;
}

static inline int bind(pps_handle_t handle, int edge)
{
	return time_pps_kcbind(handle, PPS_KC_HARDPPS, edge, PPS_TSFMT_TSPEC);
}

static inline int unbind(pps_handle_t handle)
{
	return time_pps_kcbind(handle, PPS_KC_HARDPPS, 0, PPS_TSFMT_TSPEC);
}

static inline int set_flags()
{
	struct timex tmx = { .modes = 0 };

if (adjtimex(&tmx) == -1) {
		fprintf(stderr, "adjtimex get failed: %s\n", strerror(errno));
		return -1;
	}

tmx.modes = ADJ_STATUS;
	tmx.status |= (STA_PPSFREQ | STA_PPSTIME);

if (adjtimex(&tmx) == -1) {
		fprintf(stderr, "adjtimex set failed: %s\n", strerror(errno));
		return -1;
	}

return 0;
}

static inline int unset_flags()
{
	struct timex tmx = { .modes = 0 };

if (adjtimex(&tmx) == -1) {
		fprintf(stderr, "adjtimex get failed: %s\n", strerror(errno));
		return -1;
	}

tmx.modes = ADJ_STATUS;
	tmx.status &= ~(STA_PPSFREQ | STA_PPSTIME);

if (adjtimex(&tmx) == -1) {
		fprintf(stderr, "adjtimex set failed: %s\n", strerror(errno));
		return -1;
	}

return 0;
}

static inline void usage(char *name)
{
	fprintf(stderr, "Usage: %s [-bBfFac] <ppsdev>\n"
			"Commands:\n"
			"  -b   bind kernel PPS consumer\n"
			"  -B   unbind kernel PPS consumer\n"
			"  -f   set kernel NTP PPS flags\n"
			"  -F   unset kernel NTP PPS flags\n"
			"Options:\n"
			"  -a   use assert edge\n"
			"  -c   use clear edge (default)\n",
			name);
}

static void parse_args(int argc, char **argv)
{
	while (1)
	{
		int c;
		/* getopt_long stores the option index here. */
		int option_index = 0;
		static struct option long_options[] =
		{
			{"bind",		no_argument,		0, 'b'},
			{"unbind",		no_argument,		0, 'B'},
			{"set-flags",		no_argument,		0, 'f'},
			{"unset-flags",		no_argument,		0, 'F'},
			{"assert",		no_argument,		0, 'a'},
			{"clear",		no_argument,		0, 'c'},
			{"help",		no_argument,		0, 'h'},
			{0, 0, 0, 0}
		};

c = getopt_long(argc, argv, "bBfFach", long_options, &option_index);

/* detect the end of the options. */
		if (c == -1)
			break;

switch (c)
		{
			case 'b': {
					do_bind = 1;
					break;
				}
			case 'B': {
					do_bind = 2;
					break;
				}
			case 'f': {
					do_setflags = 1;
					break;
				}
			case 'F': {
					do_setflags = 2;
					break;
				}
			case 'a': {
					opt_edge = PPS_CAPTUREASSERT;
					break;
				}
			case 'c': {
					opt_edge = PPS_CAPTURECLEAR;
					break;
				}
			case 'h': {
					usage(argv[0]);
					exit(0);
				}
			default: {
					usage(argv[0]);
					exit(1);
				}
		}
	}

if ((do_bind == 0) && (do_setflags == 0)) {
		printf("No command specified!\n");
		usage(argv[0]);
		exit(1);
	}

if (optind == argc - 1) {
		device = argv[optind];
	} else {
		printf("Device name missing!\n");
		usage(argv[0]);
		exit(1);
	}
}

int main(int argc, char *argv[])
{
	pps_handle_t handle;
	int avail_mode;

/* Check the command line */
	parse_args(argc, argv);

if (find_source(device, &handle, &avail_mode) < 0)
		exit(EXIT_FAILURE);

if (do_setflags == 2)
		if (unset_flags() < 0) {
			fprintf(stderr, "Failed to unset flags!\n");
			exit(EXIT_FAILURE);
		}

if (do_bind == 2)
		if (bind(handle, 0) < 0) {
			fprintf(stderr, "Unbind failed: %s\n", strerror(errno));
			exit(EXIT_FAILURE);
		}

if (do_bind == 1)
		if (bind(handle, opt_edge) < 0) {
			fprintf(stderr, "Bind failed: %s\n", strerror(errno));
			exit(EXIT_FAILURE);
		}

if (do_setflags == 1)
		if (set_flags() < 0) {
			fprintf(stderr, "Failed to set flags!\n");
			exit(EXIT_FAILURE);
		}

time_pps_destroy(handle);

return 0;
}

07070100000005000081A4000000000000000000000001619B4B6100000377000000000000000000000000000000000000002500000000pps-tools-0.0.0+git.20211122/ppsfind#!/bin/sh
# ppsfind -- find pps device by name
#
# Copyright (C) 2005-2007   Rodolfo Giometti <giometti@linux.it>
#
#   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.

SYS="/sys/class/pps/"

if [ $# -ne 1 ] ; then
	echo "usage: ppsfind <name>" >&2
	exit 1
fi

for dev in $SYS/* ; do
	grep -q "$1" "$dev/name" || grep -q "$1" "$dev/path" && \
	   echo "$(basename "$dev"): name=$(cat $dev/name) path=$(cat $dev/path)"
done

exit 0
07070100000006000081A4000000000000000000000001619B4B6100000504000000000000000000000000000000000000002800000000pps-tools-0.0.0+git.20211122/ppsldisc.c/*
 * ppsldics.c -- setup PPS line discipline for RS232
 *
 * Copyright (C) 2005-2007   Rodolfo Giometti <giometti@linux.it>
 *
 *   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.
 */

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <linux/tty.h>

void usage(char *name)
{
	fprintf(stderr, "usage: %s <ttyS>\n", name);

exit(EXIT_FAILURE);
}

int main(int argc, char *argv[])
{
	int fd;
	int ldisc = N_PPS;
	int ret;

if (argc < 2)
		usage(argv[0]);

fd = open(argv[1], O_RDWR);
	if (fd < 0) {
		perror("open");
		exit(EXIT_FAILURE);
	}

ret = ioctl(fd, TIOCSETD, &ldisc);
	if (ret < 0) {
		perror("ioctl(TIOCSETD)");
		exit(EXIT_FAILURE);
	}

pause();

return 0;
}
07070100000007000081A4000000000000000000000001619B4B6100000FEF000000000000000000000000000000000000002700000000pps-tools-0.0.0+git.20211122/ppstest.c/*
 * ppstest.c -- simple tool to monitor PPS timestamps
 *
 * Copyright (C) 2005-2007   Rodolfo Giometti <giometti@linux.it>
 *
 *   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.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "timepps.h"

static struct timespec offset_assert = {0, 0};

int find_source(char *path, pps_handle_t *handle, int *avail_mode)
{
	pps_params_t params;
	int ret;

printf("trying PPS source \"%s\"\n", path);

/* Try to find the source by using the supplied "path" name */
	ret = open(path, O_RDWR);
	if (ret < 0) {
		fprintf(stderr, "unable to open device \"%s\" (%m)\n", path);
		return ret;
	}

/* Capture assert timestamps */
	ret = time_pps_getparams(*handle, &params);
	if (ret < 0) {
		fprintf(stderr, "cannot get parameters (%m)\n");
		return -1;
	}
	params.mode |= PPS_CAPTUREASSERT;
	/* Override any previous offset if possible */
	if ((*avail_mode & PPS_OFFSETASSERT) != 0) {
		params.mode |= PPS_OFFSETASSERT;
		params.assert_offset = offset_assert;
	}
	ret = time_pps_setparams(*handle, &params);
	if (ret < 0) {
		fprintf(stderr, "cannot set parameters (%m)\n");
		return -1;
	}

return 0;
}

int fetch_source(int i, pps_handle_t *handle, int *avail_mode)
{
	struct timespec timeout;
	pps_info_t infobuf;
	int ret;

/* create a zero-valued timeout */
	timeout.tv_sec = 3;
	timeout.tv_nsec = 0;

retry:
	if (*avail_mode & PPS_CANWAIT) /* waits for the next event */
		ret = time_pps_fetch(*handle, PPS_TSFMT_TSPEC, &infobuf,
				   &timeout);
	else {
		sleep(1);
		ret = time_pps_fetch(*handle, PPS_TSFMT_TSPEC, &infobuf,
				   &timeout);
	}
	if (ret < 0) {
		if (ret == -EINTR) {
			fprintf(stderr, "time_pps_fetch() got a signal!\n");
			goto retry;
		}

fprintf(stderr, "time_pps_fetch() error %d (%m)\n", ret);
		return -1;
	}

printf("source %d - "
	       "assert %ld.%09ld, sequence: %ld - "
	       "clear  %ld.%09ld, sequence: %ld\n",
	       i,
	       infobuf.assert_timestamp.tv_sec,
	       infobuf.assert_timestamp.tv_nsec,
	       infobuf.assert_sequence,
	       infobuf.clear_timestamp.tv_sec,
	       infobuf.clear_timestamp.tv_nsec, infobuf.clear_sequence);
	fflush(stdout);

return 0;
}

void usage(char *name)
{
	fprintf(stderr, "usage: %s <ppsdev> [<ppsdev> ...]\n", name);
	exit(EXIT_FAILURE);
}

int main(int argc, char *argv[])
{
	int num;
	pps_handle_t handle[4];
	int avail_mode[4];
	int i = 0;
	int ret;

/* Check the command line */
	if (argc < 2)
		usage(argv[0]);

for (i = 1; i < argc && i <= 4; i++) {
		ret = find_source(argv[i], &handle[i - 1], &avail_mode[i - 1]);
		if (ret < 0)
			exit(EXIT_FAILURE);
	}

num = i - 1;
	printf("ok, found %d source(s), now start fetching data...\n", num);

/* loop, printing the most recent timestamp every second or so */
	while (1) {
		for (i = 0; i < num; i++) {
			ret = fetch_source(i, &handle[i], &avail_mode[i]);
			if (ret < 0 && errno != ETIMEDOUT)
				exit(EXIT_FAILURE);
		}
	}

for (; i >= 0; i--)
		time_pps_destroy(handle[i]);

return 0;
}
07070100000008000081A4000000000000000000000001619B4B6100001968000000000000000000000000000000000000002800000000pps-tools-0.0.0+git.20211122/ppswatch.c/*
 * ppswatch.c -- advanced tool to monitor PPS timestamps
 *
 * Copyright (C) 2009-2011   Alexander Gordeev <alex@gordick.net>
 *
 *   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.
 */

#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <getopt.h>
#include <signal.h>
#include <math.h>

#include "timepps.h"

/* variables for the command-line parameters */
static char *device;
static int mode = PPS_CAPTURECLEAR;
static int margin = 0;

/* statistic variables */
static int total = 0;
static int overflows = 0;
static int max_unsync = 0;
static int max_divergence = 0;
static double mean = 0.0;
static double M2 = 0.0;

static volatile bool quit = false;

int find_source(char *path, pps_handle_t *handle, int *avail_mode)
{
	pps_params_t params;
	int ret;

printf("trying PPS source \"%s\"\n", path);

/* Try to find the source by using the supplied "path" name */
	ret = open(path, O_RDWR);
	if (ret < 0) {
		fprintf(stderr, "unable to open device \"%s\" (%m)\n", path);
		return ret;
	}

/* Find out what features are supported */
	ret = time_pps_getcap(*handle, avail_mode);
	if (ret < 0) {
		fprintf(stderr, "cannot get capabilities (%m)\n");
		return -1;
	}

if (((*avail_mode) & mode) == mode) {
		/* Get current parameters */
		ret = time_pps_getparams(*handle, &params);
		if (ret < 0) {
			fprintf(stderr, "cannot get parameters (%m)\n");
			return -1;
		}
		params.mode |= mode;
		ret = time_pps_setparams(*handle, &params);
		if (ret < 0) {
			fprintf(stderr, "cannot set parameters (%m)\n");
			return -1;
		}
	} else {
		fprintf(stderr, "selected mode not supported (%m)\n");
		return -1;
	}

fflush(stdout);
	return 0;
}

static int curr_unsync = 0;

#define NSEC_PER_SEC 1000000000L
int fetch_source(pps_handle_t handle, int avail_mode)
{
	struct timespec timeout = { 3, 0 };
	struct timespec ts = { 0, 0 };
	unsigned long seq = 0;
	pps_info_t infobuf;
	int ret;
	long div;
	double delta, delta2;

if (avail_mode & PPS_CANWAIT) /* waits for the next event */
		ret = time_pps_fetch(handle, PPS_TSFMT_TSPEC, &infobuf,
				   &timeout);
	else {
		sleep(1);
		ret = time_pps_fetch(handle, PPS_TSFMT_TSPEC, &infobuf,
				   &timeout);
	}
	if (ret < 0 || quit) {
		if (errno == EINTR || quit) {
			return -1;
		}

fprintf(stderr, "time_pps_fetch() error %d (%m)\n", ret);
		return -1;
	}

if (mode & PPS_CAPTUREASSERT) {
		ts = infobuf.assert_timestamp;
		seq = infobuf.assert_sequence;
	} else if (mode & PPS_CAPTURECLEAR) {
		ts = infobuf.clear_timestamp;
		seq = infobuf.clear_sequence;
	}

if (ts.tv_nsec > NSEC_PER_SEC / 2) {
		ts.tv_sec++;
		ts.tv_nsec -= NSEC_PER_SEC;
	}

total++;
	div = ts.tv_nsec;
	delta = div - mean;
	mean += delta / total;
	delta2 = div - mean;
	M2 += delta * delta2;
	if (div < 0)
		div = -div;
	if (max_divergence < div)
		max_divergence = div;
	if (div >= margin) {
		printf("timestamp: %ld, sequence: %ld, offset: % 6ld\n", ts.tv_sec, seq, ts.tv_nsec);
		fflush(stdout);
		overflows++;
		curr_unsync++;
	} else {
		if (max_unsync < curr_unsync)
			max_unsync = curr_unsync;
		curr_unsync = 0;
	}

return 0;
}

static void usage(char *name)
{
	fprintf(stderr, "usage: %s [-a | -c] <ppsdev>\n", name);
}

static void parse_args(int argc, char **argv)
{
	while (1)
	{
		int c;
		/* getopt_long stores the option index here. */
		int option_index = 0;
		static struct option long_options[] =
		{
			{"assert",		no_argument,		0, 'a'},
			{"clear",		no_argument,		0, 'c'},
			{"margin",		required_argument,	0, 'm'},
			{"help",		no_argument,		0, 'h'},
			{0, 0, 0, 0}
		};

c = getopt_long(argc, argv, "acm:h", long_options, &option_index);

/* detect the end of the options. */
		if (c == -1)
			break;

switch (c)
		{
			case 'a': {
					mode |= PPS_CAPTUREASSERT;
					mode &= ~PPS_CAPTURECLEAR;
					break;
				}
			case 'c': {
					mode |= PPS_CAPTURECLEAR;
					mode &= ~PPS_CAPTUREASSERT;
					break;
				}
			case 'm': {
					char *c;
					margin = strtoul(optarg, &c, 0);
					if (*c) {
						fprintf(stderr, "Error parsing margin value.\n");
						exit(1);
					}
					if (margin < 0) {
						fprintf(stderr, "Negative margin not supported.\n");
						exit(1);
					}
					break;
				}
			case 'h': {
					usage(argv[0]);
					exit(0);
				}
			default: {
					usage(argv[0]);
					exit(1);
				}
		}
	}

if (optind == argc - 1) {
		device = argv[optind];
	} else {
		printf("Device name missing!\n");
		usage(argv[0]);
		exit(1);
	}
}

void print_stats()
{
	printf("\n\nTotal number of PPS signals: %d\n", total);
	if (margin) {
		printf("Number of overflows:         %d (%f%%)\n", overflows, 100.0 * (double)overflows / (double)total);
		printf("Maximum unsynchronized time: %d\n", max_unsync);
	}
	printf("Maximum divergence: %d\n", max_divergence);
	printf("Mean value: %g\n", mean);
	printf("Standard deviation: %g\n", sqrt(M2 / total));
}

static void sighandler_exit(int signum) {
	print_stats();
	quit = true;
}

int main(int argc, char *argv[])
{
	pps_handle_t handle;
	int avail_mode;
	struct sigaction sigact;
	int ret;

/* Check the command line */
	parse_args(argc, argv);

if (find_source(device, &handle, &avail_mode) < 0)
		exit(EXIT_FAILURE);

if (margin)
		printf("using margin %d\n", margin);

sigact.sa_handler = sighandler_exit;
	sigemptyset(&sigact.sa_mask);
	sigact.sa_flags = 0;
	sigaction(SIGINT, &sigact, NULL);
	sigaction(SIGTERM, &sigact, NULL);
	sigaction(SIGQUIT, &sigact, NULL);

/* loop, printing the most recent timestamp every second or so */
	while (1) {
		ret = fetch_source(handle, avail_mode);
		if ((ret < 0 && errno == EINTR) || quit) {
			ret = 0;
			break;
		}
		if (ret < 0 && errno != ETIMEDOUT)
			break;
	}
	
	time_pps_destroy(handle);

return ret;
}

07070100000009000081A4000000000000000000000001619B4B610000170F000000000000000000000000000000000000002700000000pps-tools-0.0.0+git.20211122/timepps.h/*
 * timepps.h -- PPS API main header
 *
 * Copyright (C) 2005-2007   Rodolfo Giometti <giometti@linux.it>
 * Copyright (C) 2009-2011   Alexander Gordeev <alex@gordick.net>
 *
 *   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.
 */

#ifndef _SYS_TIMEPPS_H_
#define _SYS_TIMEPPS_H_

#include <errno.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <linux/types.h>
#include <linux/pps.h>

#define LINUXPPS	1		/* signal we are using LinuxPPS */

/*
 * New data structures
 */

struct ntp_fp {
	unsigned int integral;
	unsigned int fractional;
};

union pps_timeu {
	struct timespec tspec;
	struct ntp_fp ntpfp;
	unsigned long longpad[3];
};

struct pps_info {
	unsigned long assert_sequence;	/* seq. num. of assert event */
	unsigned long clear_sequence;	/* seq. num. of clear event */
	union pps_timeu assert_tu;	/* time of assert event */
	union pps_timeu clear_tu;	/* time of clear event */
	int current_mode;		/* current mode bits */
};

struct pps_params {
	int api_version;		/* API version # */
	int mode;			/* mode bits */
	union pps_timeu assert_off_tu;	/* offset compensation for assert */
	union pps_timeu clear_off_tu;	/* offset compensation for clear */
};

typedef int pps_handle_t;		/* represents a PPS source */
typedef unsigned long pps_seq_t;	/* sequence number */
typedef struct ntp_fp ntp_fp_t;		/* NTP-compatible time stamp */
typedef union pps_timeu pps_timeu_t;	/* generic data type for time stamps */
typedef struct pps_info pps_info_t;
typedef struct pps_params pps_params_t;

#define assert_timestamp        assert_tu.tspec
#define clear_timestamp         clear_tu.tspec

#define assert_timestamp_ntpfp  assert_tu.ntpfp
#define clear_timestamp_ntpfp   clear_tu.ntpfp

#define assert_offset		assert_off_tu.tspec
#define clear_offset		clear_off_tu.tspec

#define assert_offset_ntpfp     assert_off_tu.ntpfp
#define clear_offset_ntpfp      clear_off_tu.ntpfp

/*
 * The PPS API
 */

static __inline int time_pps_create(int source, pps_handle_t *handle)
{
	int ret;
	struct pps_kparams dummy;

if (!handle) {
		errno = EINVAL;
		return -1;
	}

/* First we check if current device is a valid PPS one by
	 * doing a dummy PPS_GETPARAMS...
	 */
	ret = ioctl(source, PPS_GETPARAMS, &dummy);
	if (ret) {
		errno = EOPNOTSUPP;
		return -1;
	}

/* ... then since in LinuxPPS there are no differences between a
	 * "PPS source" and a "PPS handle", we simply return the same value.
	 */
	*handle = source;

return 0;
}

static __inline int time_pps_destroy(pps_handle_t handle)
{
	return close(handle);
}

static __inline int time_pps_getparams(pps_handle_t handle,
					pps_params_t *ppsparams)
{
	int ret;
	struct pps_kparams __ppsparams = {};

ret = ioctl(handle, PPS_GETPARAMS, &__ppsparams);

ppsparams->api_version = __ppsparams.api_version;
	ppsparams->mode = __ppsparams.mode;
	ppsparams->assert_off_tu.tspec.tv_sec = __ppsparams.assert_off_tu.sec;
	ppsparams->assert_off_tu.tspec.tv_nsec = __ppsparams.assert_off_tu.nsec;
	ppsparams->clear_off_tu.tspec.tv_sec = __ppsparams.clear_off_tu.sec;
	ppsparams->clear_off_tu.tspec.tv_nsec = __ppsparams.clear_off_tu.nsec;

return ret;
}

static __inline int time_pps_setparams(pps_handle_t handle,
					const pps_params_t *ppsparams)
{
	struct pps_kparams __ppsparams = {};

__ppsparams.api_version = ppsparams->api_version;
	__ppsparams.mode = ppsparams->mode;
	__ppsparams.assert_off_tu.sec = ppsparams->assert_off_tu.tspec.tv_sec;
	__ppsparams.assert_off_tu.nsec = ppsparams->assert_off_tu.tspec.tv_nsec;
	__ppsparams.clear_off_tu.sec = ppsparams->clear_off_tu.tspec.tv_sec;
	__ppsparams.clear_off_tu.nsec = ppsparams->clear_off_tu.tspec.tv_nsec;

return ioctl(handle, PPS_SETPARAMS, &__ppsparams);
}

/* Get capabilities for handle */
static __inline int time_pps_getcap(pps_handle_t handle, int *mode)
{
	return ioctl(handle, PPS_GETCAP, mode);
}

static __inline int time_pps_fetch(pps_handle_t handle, const int tsformat,
					pps_info_t *ppsinfobuf,
					const struct timespec *timeout)
{
	struct pps_fdata __fdata = {};
	int ret;

/* Sanity checks */
	if (tsformat != PPS_TSFMT_TSPEC) {
		errno = EINVAL;
		return -1;
	}

if (timeout) {
		__fdata.timeout.sec = timeout->tv_sec;
		__fdata.timeout.nsec = timeout->tv_nsec;
	} else
		__fdata.timeout.flags = PPS_TIME_INVALID;

ret = ioctl(handle, PPS_FETCH, &__fdata);

ppsinfobuf->assert_sequence = __fdata.info.assert_sequence;
	ppsinfobuf->clear_sequence = __fdata.info.clear_sequence;
	ppsinfobuf->assert_tu.tspec.tv_sec = __fdata.info.assert_tu.sec;
	ppsinfobuf->assert_tu.tspec.tv_nsec = __fdata.info.assert_tu.nsec;
	ppsinfobuf->clear_tu.tspec.tv_sec = __fdata.info.clear_tu.sec;
	ppsinfobuf->clear_tu.tspec.tv_nsec = __fdata.info.clear_tu.nsec;
	ppsinfobuf->current_mode = __fdata.info.current_mode;

return ret;
}

#ifdef PPS_KC_BIND

static __inline int time_pps_kcbind(pps_handle_t handle,
					const int kernel_consumer,
					const int edge, const int tsformat)
{
	struct pps_bind_args __bind_args = {};

__bind_args.tsformat = tsformat;
	__bind_args.edge = edge;
	__bind_args.consumer = kernel_consumer;

return ioctl(handle, PPS_KC_BIND, &__bind_args);
}

#else /* !PPS_KC_BIND */

static __inline int time_pps_kcbind(pps_handle_t handle,
					const int kernel_consumer,
					const int edge, const int tsformat)
{
	/* LinuxPPS doesn't implement kernel consumer feature */
	errno = EOPNOTSUPP;
	return -1;
}

#endif /* PPS_KC_BIND */

#endif /* _SYS_TIMEPPS_H_ */
07070100000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000B00000000TRAILER!!!88 blocks

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