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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note *//* * PPS API header * * Copyright (C) 2005-2009 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef _PPS_H_#define _PPS_H_
#include <linux/types.h>
#define PPS_VERSION "5.3.6"#define PPS_MAX_SOURCES 256 /* should be enough... */
/* Implementation note: the logical states ``assert'' and ``clear'' * are implemented in terms of the chip register, i.e. ``assert'' * means the bit is set. */
/* * 3.2 New data structures */
#define PPS_API_VERS_1 1#define PPS_API_VERS PPS_API_VERS_1 /* we use API version 1 */#define PPS_MAX_NAME_LEN 32
/* 32-bit vs. 64-bit compatibility. * * 0n i386, the alignment of a uint64_t is only 4 bytes, while on most other * architectures it's 8 bytes. On i386, there will be no padding between the * two consecutive 'struct pps_ktime' members of struct pps_kinfo and struct * pps_kparams. But on most platforms there will be padding to ensure correct * alignment. * * The simple fix is probably to add an explicit padding. * [David Woodhouse] */struct pps_ktime { __s64 sec; __s32 nsec; __u32 flags;};
struct pps_ktime_compat { __s64 sec; __s32 nsec; __u32 flags;} __attribute__((packed, aligned(4)));#define PPS_TIME_INVALID (1<<0) /* used to specify timeout==NULL */
struct pps_kinfo { __u32 assert_sequence; /* seq. num. of assert event */ __u32 clear_sequence; /* seq. num. of clear event */ struct pps_ktime assert_tu; /* time of assert event */ struct pps_ktime clear_tu; /* time of clear event */ int current_mode; /* current mode bits */};
struct pps_kinfo_compat { __u32 assert_sequence; /* seq. num. of assert event */ __u32 clear_sequence; /* seq. num. of clear event */ struct pps_ktime_compat assert_tu; /* time of assert event */ struct pps_ktime_compat clear_tu; /* time of clear event */ int current_mode; /* current mode bits */};
struct pps_kparams { int api_version; /* API version # */ int mode; /* mode bits */ struct pps_ktime assert_off_tu; /* offset compensation for assert */ struct pps_ktime clear_off_tu; /* offset compensation for clear */};
/* * 3.3 Mode bit definitions */
/* Device/implementation parameters */#define PPS_CAPTUREASSERT 0x01 /* capture assert events */#define PPS_CAPTURECLEAR 0x02 /* capture clear events */#define PPS_CAPTUREBOTH 0x03 /* capture assert and clear events */
#define PPS_OFFSETASSERT 0x10 /* apply compensation for assert event */#define PPS_OFFSETCLEAR 0x20 /* apply compensation for clear event */
#define PPS_CANWAIT 0x100 /* can we wait for an event? */#define PPS_CANPOLL 0x200 /* bit reserved for future use */
/* Kernel actions */#define PPS_ECHOASSERT 0x40 /* feed back assert event to output */#define PPS_ECHOCLEAR 0x80 /* feed back clear event to output */
/* Timestamp formats */#define PPS_TSFMT_TSPEC 0x1000 /* select timespec format */#define PPS_TSFMT_NTPFP 0x2000 /* select NTP format */
/* * 3.4.4 New functions: disciplining the kernel timebase */
/* Kernel consumers */#define PPS_KC_HARDPPS 0 /* hardpps() (or equivalent) */#define PPS_KC_HARDPPS_PLL 1 /* hardpps() constrained to use a phase-locked loop */#define PPS_KC_HARDPPS_FLL 2 /* hardpps() constrained to use a frequency-locked loop *//* * Here begins the implementation-specific part! */
struct pps_fdata { struct pps_kinfo info; struct pps_ktime timeout;};
struct pps_fdata_compat { struct pps_kinfo_compat info; struct pps_ktime_compat timeout;};
struct pps_bind_args { int tsformat; /* format of time stamps */ int edge; /* selected event type */ int consumer; /* selected kernel consumer */};
#include <linux/ioctl.h>
#define PPS_GETPARAMS _IOR('p', 0xa1, struct pps_kparams *)#define PPS_SETPARAMS _IOW('p', 0xa2, struct pps_kparams *)#define PPS_GETCAP _IOR('p', 0xa3, int *)#define PPS_FETCH _IOWR('p', 0xa4, struct pps_fdata *)#define PPS_KC_BIND _IOW('p', 0xa5, struct pps_bind_args *)
#endif /* _PPS_H_ */