File pps-tools-0.0.0+git.20211122.obscpio of Package pps-tools

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File pps-tools-0.0.0+git.20211122.obscpio of Package pps-tools

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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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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