1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
3 * PTP 1588 clock support - user space interface
5 * Copyright (C) 2010 OMICRON electronics GmbH
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <linux/ioctl.h>
26 #include <linux/types.h>
29 * Bits of the ptp_extts_request.flags field:
31 #define PTP_ENABLE_FEATURE (1<<0)
32 #define PTP_RISING_EDGE (1<<1)
33 #define PTP_FALLING_EDGE (1<<2)
34 #define PTP_STRICT_FLAGS (1<<3)
35 #define PTP_EXT_OFFSET (1<<4)
36 #define PTP_EXTTS_EDGES (PTP_RISING_EDGE | PTP_FALLING_EDGE)
39 * flag fields valid for the new PTP_EXTTS_REQUEST2 ioctl.
41 #define PTP_EXTTS_VALID_FLAGS (PTP_ENABLE_FEATURE | \
48 * flag fields valid for the original PTP_EXTTS_REQUEST ioctl.
49 * DO NOT ADD NEW FLAGS HERE.
51 #define PTP_EXTTS_V1_VALID_FLAGS (PTP_ENABLE_FEATURE | \
56 * flag fields valid for the ptp_extts_event report.
58 #define PTP_EXTTS_EVENT_VALID (PTP_ENABLE_FEATURE)
61 * Bits of the ptp_perout_request.flags field:
63 #define PTP_PEROUT_ONE_SHOT (1<<0)
64 #define PTP_PEROUT_DUTY_CYCLE (1<<1)
65 #define PTP_PEROUT_PHASE (1<<2)
68 * flag fields valid for the new PTP_PEROUT_REQUEST2 ioctl.
70 #define PTP_PEROUT_VALID_FLAGS (PTP_PEROUT_ONE_SHOT | \
71 PTP_PEROUT_DUTY_CYCLE | \
75 * No flags are valid for the original PTP_PEROUT_REQUEST ioctl
77 #define PTP_PEROUT_V1_VALID_FLAGS (0)
80 * struct ptp_clock_time - represents a time value
82 * The sign of the seconds field applies to the whole value. The
83 * nanoseconds field is always unsigned. The reserved field is
84 * included for sub-nanosecond resolution, should the demand for
88 struct ptp_clock_time {
89 __s64 sec; /* seconds */
90 __u32 nsec; /* nanoseconds */
94 struct ptp_clock_caps {
95 int max_adj; /* Maximum frequency adjustment in parts per billon. */
96 int n_alarm; /* Number of programmable alarms. */
97 int n_ext_ts; /* Number of external time stamp channels. */
98 int n_per_out; /* Number of programmable periodic signals. */
99 int pps; /* Whether the clock supports a PPS callback. */
100 int n_pins; /* Number of input/output pins. */
101 /* Whether the clock supports precise system-device cross timestamps */
102 int cross_timestamping;
103 /* Whether the clock supports adjust phase */
105 int max_phase_adj; /* Maximum phase adjustment in nanoseconds. */
106 int rsv[11]; /* Reserved for future use. */
109 struct ptp_extts_request {
110 unsigned int index; /* Which channel to configure. */
111 unsigned int flags; /* Bit field for PTP_xxx flags. */
112 unsigned int rsv[2]; /* Reserved for future use. */
115 struct ptp_perout_request {
118 * Absolute start time.
119 * Valid only if (flags & PTP_PEROUT_PHASE) is unset.
121 struct ptp_clock_time start;
123 * Phase offset. The signal should start toggling at an
124 * unspecified integer multiple of the period, plus this value.
125 * The start time should be "as soon as possible".
126 * Valid only if (flags & PTP_PEROUT_PHASE) is set.
128 struct ptp_clock_time phase;
130 struct ptp_clock_time period; /* Desired period, zero means disable. */
131 unsigned int index; /* Which channel to configure. */
135 * The "on" time of the signal.
136 * Must be lower than the period.
137 * Valid only if (flags & PTP_PEROUT_DUTY_CYCLE) is set.
139 struct ptp_clock_time on;
140 /* Reserved for future use. */
145 #define PTP_MAX_SAMPLES 25 /* Maximum allowed offset measurement samples. */
147 struct ptp_sys_offset {
148 unsigned int n_samples; /* Desired number of measurements. */
149 unsigned int rsv[3]; /* Reserved for future use. */
151 * Array of interleaved system/phc time stamps. The kernel
152 * will provide 2*n_samples + 1 time stamps, with the last
153 * one as a system time stamp.
155 struct ptp_clock_time ts[2 * PTP_MAX_SAMPLES + 1];
158 struct ptp_sys_offset_extended {
159 unsigned int n_samples; /* Desired number of measurements. */
160 unsigned int rsv[3]; /* Reserved for future use. */
162 * Array of [system, phc, system] time stamps. The kernel will provide
163 * 3*n_samples time stamps.
165 struct ptp_clock_time ts[PTP_MAX_SAMPLES][3];
168 struct ptp_sys_offset_precise {
169 struct ptp_clock_time device;
170 struct ptp_clock_time sys_realtime;
171 struct ptp_clock_time sys_monoraw;
172 unsigned int rsv[4]; /* Reserved for future use. */
175 enum ptp_pin_function {
182 struct ptp_pin_desc {
184 * Hardware specific human readable pin name. This field is
185 * set by the kernel during the PTP_PIN_GETFUNC ioctl and is
186 * ignored for the PTP_PIN_SETFUNC ioctl.
190 * Pin index in the range of zero to ptp_clock_caps.n_pins - 1.
194 * Which of the PTP_PF_xxx functions to use on this pin.
198 * The specific channel to use for this function.
199 * This corresponds to the 'index' field of the
200 * PTP_EXTTS_REQUEST and PTP_PEROUT_REQUEST ioctls.
204 * Reserved for future use.
209 #define PTP_CLK_MAGIC '='
211 #define PTP_CLOCK_GETCAPS _IOR(PTP_CLK_MAGIC, 1, struct ptp_clock_caps)
212 #define PTP_EXTTS_REQUEST _IOW(PTP_CLK_MAGIC, 2, struct ptp_extts_request)
213 #define PTP_PEROUT_REQUEST _IOW(PTP_CLK_MAGIC, 3, struct ptp_perout_request)
214 #define PTP_ENABLE_PPS _IOW(PTP_CLK_MAGIC, 4, int)
215 #define PTP_SYS_OFFSET _IOW(PTP_CLK_MAGIC, 5, struct ptp_sys_offset)
216 #define PTP_PIN_GETFUNC _IOWR(PTP_CLK_MAGIC, 6, struct ptp_pin_desc)
217 #define PTP_PIN_SETFUNC _IOW(PTP_CLK_MAGIC, 7, struct ptp_pin_desc)
218 #define PTP_SYS_OFFSET_PRECISE \
219 _IOWR(PTP_CLK_MAGIC, 8, struct ptp_sys_offset_precise)
220 #define PTP_SYS_OFFSET_EXTENDED \
221 _IOWR(PTP_CLK_MAGIC, 9, struct ptp_sys_offset_extended)
223 #define PTP_CLOCK_GETCAPS2 _IOR(PTP_CLK_MAGIC, 10, struct ptp_clock_caps)
224 #define PTP_EXTTS_REQUEST2 _IOW(PTP_CLK_MAGIC, 11, struct ptp_extts_request)
225 #define PTP_PEROUT_REQUEST2 _IOW(PTP_CLK_MAGIC, 12, struct ptp_perout_request)
226 #define PTP_ENABLE_PPS2 _IOW(PTP_CLK_MAGIC, 13, int)
227 #define PTP_SYS_OFFSET2 _IOW(PTP_CLK_MAGIC, 14, struct ptp_sys_offset)
228 #define PTP_PIN_GETFUNC2 _IOWR(PTP_CLK_MAGIC, 15, struct ptp_pin_desc)
229 #define PTP_PIN_SETFUNC2 _IOW(PTP_CLK_MAGIC, 16, struct ptp_pin_desc)
230 #define PTP_SYS_OFFSET_PRECISE2 \
231 _IOWR(PTP_CLK_MAGIC, 17, struct ptp_sys_offset_precise)
232 #define PTP_SYS_OFFSET_EXTENDED2 \
233 _IOWR(PTP_CLK_MAGIC, 18, struct ptp_sys_offset_extended)
234 #define PTP_MASK_CLEAR_ALL _IO(PTP_CLK_MAGIC, 19)
235 #define PTP_MASK_EN_SINGLE _IOW(PTP_CLK_MAGIC, 20, unsigned int)
237 struct ptp_extts_event {
238 struct ptp_clock_time t; /* Time event occurred. */
239 unsigned int index; /* Which channel produced the event. */
240 unsigned int flags; /* Event type. */
241 unsigned int rsv[2]; /* Reserved for future use. */