e2be04c7f9
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be. This makes it hard for
compliance tools to determine the correct license.
Update these files with an SPDX license identifier. The identifier was
chosen based on the license information in the file.
GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:
NOTE! This copyright does *not* cover user programs that use kernel
services by normal system calls - this is merely considered normal use
of the kernel, and does *not* fall under the heading of "derived work".
This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.
Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier. The format
is:
((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)
SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text. The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne. See the previous patch in this series for the
methodology of how this patch was researched.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
152 lines
4.6 KiB
C
152 lines
4.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* PPS API header
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*
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* Copyright (C) 2005-2009 Rodolfo Giometti <giometti@linux.it>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _PPS_H_
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#define _PPS_H_
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#include <linux/types.h>
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#define PPS_VERSION "5.3.6"
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#define PPS_MAX_SOURCES 16 /* should be enough... */
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/* Implementation note: the logical states ``assert'' and ``clear''
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* are implemented in terms of the chip register, i.e. ``assert''
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* means the bit is set. */
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/*
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* 3.2 New data structures
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*/
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#define PPS_API_VERS_1 1
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#define PPS_API_VERS PPS_API_VERS_1 /* we use API version 1 */
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#define PPS_MAX_NAME_LEN 32
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/* 32-bit vs. 64-bit compatibility.
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*
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* 0n i386, the alignment of a uint64_t is only 4 bytes, while on most other
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* architectures it's 8 bytes. On i386, there will be no padding between the
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* two consecutive 'struct pps_ktime' members of struct pps_kinfo and struct
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* pps_kparams. But on most platforms there will be padding to ensure correct
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* alignment.
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*
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* The simple fix is probably to add an explicit padding.
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* [David Woodhouse]
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*/
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struct pps_ktime {
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__s64 sec;
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__s32 nsec;
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__u32 flags;
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};
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struct pps_ktime_compat {
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__s64 sec;
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__s32 nsec;
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__u32 flags;
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} __attribute__((packed, aligned(4)));
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#define PPS_TIME_INVALID (1<<0) /* used to specify timeout==NULL */
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struct pps_kinfo {
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__u32 assert_sequence; /* seq. num. of assert event */
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__u32 clear_sequence; /* seq. num. of clear event */
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struct pps_ktime assert_tu; /* time of assert event */
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struct pps_ktime clear_tu; /* time of clear event */
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int current_mode; /* current mode bits */
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};
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struct pps_kinfo_compat {
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__u32 assert_sequence; /* seq. num. of assert event */
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__u32 clear_sequence; /* seq. num. of clear event */
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struct pps_ktime_compat assert_tu; /* time of assert event */
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struct pps_ktime_compat clear_tu; /* time of clear event */
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int current_mode; /* current mode bits */
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};
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struct pps_kparams {
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int api_version; /* API version # */
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int mode; /* mode bits */
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struct pps_ktime assert_off_tu; /* offset compensation for assert */
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struct pps_ktime clear_off_tu; /* offset compensation for clear */
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};
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/*
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* 3.3 Mode bit definitions
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*/
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/* Device/implementation parameters */
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#define PPS_CAPTUREASSERT 0x01 /* capture assert events */
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#define PPS_CAPTURECLEAR 0x02 /* capture clear events */
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#define PPS_CAPTUREBOTH 0x03 /* capture assert and clear events */
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#define PPS_OFFSETASSERT 0x10 /* apply compensation for assert event */
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#define PPS_OFFSETCLEAR 0x20 /* apply compensation for clear event */
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#define PPS_CANWAIT 0x100 /* can we wait for an event? */
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#define PPS_CANPOLL 0x200 /* bit reserved for future use */
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/* Kernel actions */
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#define PPS_ECHOASSERT 0x40 /* feed back assert event to output */
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#define PPS_ECHOCLEAR 0x80 /* feed back clear event to output */
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/* Timestamp formats */
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#define PPS_TSFMT_TSPEC 0x1000 /* select timespec format */
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#define PPS_TSFMT_NTPFP 0x2000 /* select NTP format */
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/*
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* 3.4.4 New functions: disciplining the kernel timebase
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*/
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/* Kernel consumers */
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#define PPS_KC_HARDPPS 0 /* hardpps() (or equivalent) */
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#define PPS_KC_HARDPPS_PLL 1 /* hardpps() constrained to
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use a phase-locked loop */
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#define PPS_KC_HARDPPS_FLL 2 /* hardpps() constrained to
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use a frequency-locked loop */
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/*
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* Here begins the implementation-specific part!
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*/
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struct pps_fdata {
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struct pps_kinfo info;
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struct pps_ktime timeout;
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};
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struct pps_fdata_compat {
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struct pps_kinfo_compat info;
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struct pps_ktime_compat timeout;
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};
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struct pps_bind_args {
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int tsformat; /* format of time stamps */
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int edge; /* selected event type */
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int consumer; /* selected kernel consumer */
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};
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#include <linux/ioctl.h>
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#define PPS_GETPARAMS _IOR('p', 0xa1, struct pps_kparams *)
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#define PPS_SETPARAMS _IOW('p', 0xa2, struct pps_kparams *)
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#define PPS_GETCAP _IOR('p', 0xa3, int *)
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#define PPS_FETCH _IOWR('p', 0xa4, struct pps_fdata *)
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#define PPS_KC_BIND _IOW('p', 0xa5, struct pps_bind_args *)
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#endif /* _PPS_H_ */
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