NetBSD/sys/sys/timepps.h

/*	$NetBSD: timepps.h,v 1.4 2000/07/23 22:56:14 mycroft Exp $	*/

/*
 * Copyright (c) 1998 Jonathan Stone
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Jonathan Stone for
 *      the NetBSD Project.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _SYS_TIMEPPS_H_
#define _SYS_TIMEPPS_H_

/*
 * This header file complies with "Pulse-Per-Second API for UNIX-like
 * Operating Systems, Version 1.0", draft-mogul-pps-api-05.txt
 */

#include <sys/ioccom.h>

#define PPS_API_VERS_1	1	/* API version number */

/*
 * PPSAPI type definitions
 */
typedef int32_t pps_handle_t;	/* represents a PPS source */
typedef u_int32_t pps_seq_t;	/* sequence number, at least 32 bits */

typedef union pps_timeu {
	struct timespec	tspec;
	struct {        /* NTP long fixed-point format */
		unsigned int     integral;
		unsigned int     fractional;
	} ntplfp;
	unsigned long   longpair[2];
} pps_timeu_t;


/*
 * timestamp information
 */
typedef struct {
	pps_seq_t	assert_sequence;	/* assert event seq # */
	pps_seq_t	clear_sequence;		/* clear event seq # */
	pps_timeu_t	assert_tu;
	pps_timeu_t	clear_tu;
	int		current_mode;		/* current mode bits */
} pps_info_t;

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


/*
 * Parameter structure
 */
typedef struct {
	int api_version;			/* API version number */
	int mode;				/* mode bits */
	pps_timeu_t	assert_off_tu;
	pps_timeu_t	clear_off_tu;
} pps_params_t;
#define assert_offset		assert_off_tu.tspec
#define clear_offset		clear_off_tu.tspec


/*
 * Device/implementation parameters (mode, edge bits)
 */
#define PPS_CAPTUREASSERT	0x01
#define PPS_CAPTURECLEAR	0x02
#define PPS_CAPTUREBOTH		0x03
#define PPS_OFFSETASSERT	0x10
#define PPS_OFFSETCLEAR		0x20
#define PPS_CANWAIT		0x100
#define PPS_CANPOLL		0x200

/*
 * Kernel actions
 */
#define PPS_ECHOASSERT		0x40
#define PPS_ECHOCLEAR		0x80


/*
 * timestamp formats (tsformat, mode)
 */
#define PPS_TSFMT_TSPEC		0x1000
#define PPS_TSFMT_NTPLFP	0x2000

/*
 * Kernel discipline actions (kernel_consumer)
 */
#define PPS_KC_HARDPPS		0
#define PPS_KC_HARDPPS_PLL	1
#define PPS_KC_HARDPPS_FLL	2

/*
 * IOCTL definitions
 */
#define PPS_IOC_CREATE		_IO('1', 1)
#define PPS_IOC_DESTROY		_IO('1', 2)
#define PPS_IOC_SETPARAMS	_IOW('1', 3, pps_params_t)
#define PPS_IOC_GETPARAMS	_IOR('1', 4, pps_params_t)
#define PPS_IOC_GETCAP		_IOR('1', 5, int)
#define PPS_IOC_FETCH		_IOWR('1', 6, pps_info_t)
#define PPS_IOC_KCBIND		_IOWR('1', 7, int)

#ifndef _KERNEL

#include <sys/cdefs.h>
#include <sys/ioctl.h>

static __inline int time_pps_create __P((int filedes, pps_handle_t *handle));
static __inline int time_pps_destroy __P((pps_handle_t handle));
static __inline int time_pps_setparams __P((pps_handle_t handle, 
	const pps_params_t *ppsparams));
static __inline int time_pps_getparams __P((pps_handle_t handle,
	pps_params_t *ppsparams));
static __inline int time_pps_getcap __P((pps_handle_t handle, int *mode));
static __inline int time_pps_fetch __P((pps_handle_t handle,
	const int tsformat, pps_info_t *ppsinfobuf,
	const struct timespec *timeout));
#if 0
static __inline int time_pps_wait __P((pps_handle_t handle,
       const struct timespec *timeout, pps_info_t *ppsinfobuf));
#endif

static __inline int time_pps_kcbind __P((pps_handle_t handle,
	 const int kernel_consumer, const int edge, const int tsformat));

static __inline int
time_pps_create(filedes, handle)
	int filedes;
	pps_handle_t *handle;
{
	*handle = filedes;
	return (0);
}

static __inline int
time_pps_destroy(handle)
	pps_handle_t handle;
{
	return (0);
}

static __inline int
time_pps_setparams(handle, ppsparams)
	pps_handle_t handle;
	const pps_params_t *ppsparams;
{
	return (ioctl(handle, PPS_IOC_SETPARAMS, ppsparams));
}

static __inline int
time_pps_getparams(handle, ppsparams)
	pps_handle_t handle;
	pps_params_t *ppsparams;
{
	return (ioctl(handle, PPS_IOC_GETPARAMS, ppsparams));
}

static __inline int 
time_pps_getcap(handle, mode)
	pps_handle_t handle;
	int *mode;
{
	return (ioctl(handle, PPS_IOC_GETCAP, mode));
}

static __inline int
time_pps_fetch(handle, tsformat, ppsinfobuf, timeout)
	pps_handle_t handle;
	const int tsformat;
	pps_info_t *ppsinfobuf;
	const struct timespec *timeout;
{
	return (ioctl(handle, PPS_IOC_FETCH, ppsinfobuf));
}

static __inline int
time_pps_kcbind(handle, kernel_consumer, edge, tsformat)
	pps_handle_t handle;
	const int kernel_consumer;
	const int edge;
	const int tsformat;
{
	return (ioctl(handle, PPS_IOC_KCBIND, edge));
}
#endif /* !_KERNEL*/

#endif /* SYS_TIMEPPS_H_ */