2 * PTP 1588 clock support - user space interface
4 * Copyright (C) 2010 OMICRON electronics GmbH
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/ioctl.h>
25 #include <linux/types.h>
27 /* PTP_xxx bits, for the flags field within the request structures. */
28 #define PTP_ENABLE_FEATURE (1<<0)
29 #define PTP_RISING_EDGE (1<<1)
30 #define PTP_FALLING_EDGE (1<<2)
33 * struct ptp_clock_time - represents a time value
35 * The sign of the seconds field applies to the whole value. The
36 * nanoseconds field is always unsigned. The reserved field is
37 * included for sub-nanosecond resolution, should the demand for
41 struct ptp_clock_time
{
42 __s64 sec
; /* seconds */
43 __u32 nsec
; /* nanoseconds */
47 struct ptp_clock_caps
{
48 int max_adj
; /* Maximum frequency adjustment in parts per billon. */
49 int n_alarm
; /* Number of programmable alarms. */
50 int n_ext_ts
; /* Number of external time stamp channels. */
51 int n_per_out
; /* Number of programmable periodic signals. */
52 int pps
; /* Whether the clock supports a PPS callback. */
53 int rsv
[15]; /* Reserved for future use. */
56 struct ptp_extts_request
{
57 unsigned int index
; /* Which channel to configure. */
58 unsigned int flags
; /* Bit field for PTP_xxx flags. */
59 unsigned int rsv
[2]; /* Reserved for future use. */
62 struct ptp_perout_request
{
63 struct ptp_clock_time start
; /* Absolute start time. */
64 struct ptp_clock_time period
; /* Desired period, zero means disable. */
65 unsigned int index
; /* Which channel to configure. */
66 unsigned int flags
; /* Reserved for future use. */
67 unsigned int rsv
[4]; /* Reserved for future use. */
70 #define PTP_CLK_MAGIC '='
72 #define PTP_CLOCK_GETCAPS _IOR(PTP_CLK_MAGIC, 1, struct ptp_clock_caps)
73 #define PTP_EXTTS_REQUEST _IOW(PTP_CLK_MAGIC, 2, struct ptp_extts_request)
74 #define PTP_PEROUT_REQUEST _IOW(PTP_CLK_MAGIC, 3, struct ptp_perout_request)
75 #define PTP_ENABLE_PPS _IOW(PTP_CLK_MAGIC, 4, int)
77 struct ptp_extts_event
{
78 struct ptp_clock_time t
; /* Time event occured. */
79 unsigned int index
; /* Which channel produced the event. */
80 unsigned int flags
; /* Reserved for future use. */
81 unsigned int rsv
[2]; /* Reserved for future use. */
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