235 lines
7.3 KiB
C
235 lines
7.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* PTP 1588 clock support - user space interface
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*
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* Copyright (C) 2010 OMICRON electronics GmbH
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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 _PTP_CLOCK_H_
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#define _PTP_CLOCK_H_
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/*
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* Bits of the ptp_extts_request.flags field:
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*/
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#define PTP_ENABLE_FEATURE (1<<0)
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#define PTP_RISING_EDGE (1<<1)
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#define PTP_FALLING_EDGE (1<<2)
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#define PTP_STRICT_FLAGS (1<<3)
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#define PTP_EXTTS_EDGES (PTP_RISING_EDGE | PTP_FALLING_EDGE)
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/*
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* flag fields valid for the new PTP_EXTTS_REQUEST2 ioctl.
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*/
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#define PTP_EXTTS_VALID_FLAGS (PTP_ENABLE_FEATURE | \
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PTP_RISING_EDGE | \
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PTP_FALLING_EDGE | \
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PTP_STRICT_FLAGS)
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/*
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* flag fields valid for the original PTP_EXTTS_REQUEST ioctl.
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* DO NOT ADD NEW FLAGS HERE.
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*/
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#define PTP_EXTTS_V1_VALID_FLAGS (PTP_ENABLE_FEATURE | \
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PTP_RISING_EDGE | \
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PTP_FALLING_EDGE)
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/*
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* Bits of the ptp_perout_request.flags field:
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*/
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#define PTP_PEROUT_ONE_SHOT (1<<0)
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#define PTP_PEROUT_DUTY_CYCLE (1<<1)
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#define PTP_PEROUT_PHASE (1<<2)
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/*
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* flag fields valid for the new PTP_PEROUT_REQUEST2 ioctl.
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*/
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#define PTP_PEROUT_VALID_FLAGS (PTP_PEROUT_ONE_SHOT | \
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PTP_PEROUT_DUTY_CYCLE | \
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PTP_PEROUT_PHASE)
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/*
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* No flags are valid for the original PTP_PEROUT_REQUEST ioctl
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*/
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#define PTP_PEROUT_V1_VALID_FLAGS (0)
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/*
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* struct ptp_clock_time - represents a time value
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*
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* The sign of the seconds field applies to the whole value. The
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* nanoseconds field is always unsigned. The reserved field is
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* included for sub-nanosecond resolution, should the demand for
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* this ever appear.
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*
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*/
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struct ptp_clock_time {
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__s64 sec; /* seconds */
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__u32 nsec; /* nanoseconds */
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__u32 reserved;
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};
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struct ptp_clock_caps {
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int max_adj; /* Maximum frequency adjustment in parts per billon. */
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int n_alarm; /* Number of programmable alarms. */
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int n_ext_ts; /* Number of external time stamp channels. */
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int n_per_out; /* Number of programmable periodic signals. */
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int pps; /* Whether the clock supports a PPS callback. */
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int n_pins; /* Number of input/output pins. */
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/* Whether the clock supports precise system-device cross timestamps */
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int cross_timestamping;
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/* Whether the clock supports adjust phase */
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int adjust_phase;
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int rsv[12]; /* Reserved for future use. */
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};
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struct ptp_extts_request {
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unsigned int index; /* Which channel to configure. */
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unsigned int flags; /* Bit field for PTP_xxx flags. */
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unsigned int rsv[2]; /* Reserved for future use. */
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};
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struct ptp_perout_request {
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union {
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/*
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* Absolute start time.
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* Valid only if (flags & PTP_PEROUT_PHASE) is unset.
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*/
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struct ptp_clock_time start;
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/*
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* Phase offset. The signal should start toggling at an
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* unspecified integer multiple of the period, plus this value.
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* The start time should be "as soon as possible".
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* Valid only if (flags & PTP_PEROUT_PHASE) is set.
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*/
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struct ptp_clock_time phase;
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};
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struct ptp_clock_time period; /* Desired period, zero means disable. */
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unsigned int index; /* Which channel to configure. */
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unsigned int flags;
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union {
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/*
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* The "on" time of the signal.
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* Must be lower than the period.
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* Valid only if (flags & PTP_PEROUT_DUTY_CYCLE) is set.
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*/
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struct ptp_clock_time on;
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/* Reserved for future use. */
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unsigned int rsv[4];
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};
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};
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#define PTP_MAX_SAMPLES 25 /* Maximum allowed offset measurement samples. */
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struct ptp_sys_offset {
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unsigned int n_samples; /* Desired number of measurements. */
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unsigned int rsv[3]; /* Reserved for future use. */
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/*
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* Array of interleaved system/phc time stamps. The kernel
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* will provide 2*n_samples + 1 time stamps, with the last
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* one as a system time stamp.
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*/
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struct ptp_clock_time ts[2 * PTP_MAX_SAMPLES + 1];
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};
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struct ptp_sys_offset_extended {
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unsigned int n_samples; /* Desired number of measurements. */
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unsigned int rsv[3]; /* Reserved for future use. */
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/*
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* Array of [system, phc, system] time stamps. The kernel will provide
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* 3*n_samples time stamps.
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*/
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struct ptp_clock_time ts[PTP_MAX_SAMPLES][3];
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};
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struct ptp_sys_offset_precise {
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struct ptp_clock_time device;
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struct ptp_clock_time sys_realtime;
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struct ptp_clock_time sys_monoraw;
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unsigned int rsv[4]; /* Reserved for future use. */
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};
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enum ptp_pin_function {
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PTP_PF_NONE,
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PTP_PF_EXTTS,
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PTP_PF_PEROUT,
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PTP_PF_PHYSYNC,
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};
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struct ptp_pin_desc {
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/*
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* Hardware specific human readable pin name. This field is
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* set by the kernel during the PTP_PIN_GETFUNC ioctl and is
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* ignored for the PTP_PIN_SETFUNC ioctl.
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*/
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char name[64];
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/*
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* Pin index in the range of zero to ptp_clock_caps.n_pins - 1.
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*/
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unsigned int index;
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/*
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* Which of the PTP_PF_xxx functions to use on this pin.
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*/
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unsigned int func;
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/*
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* The specific channel to use for this function.
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* This corresponds to the 'index' field of the
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* PTP_EXTTS_REQUEST and PTP_PEROUT_REQUEST ioctls.
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*/
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unsigned int chan;
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/*
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* Reserved for future use.
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*/
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unsigned int rsv[5];
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};
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#define PTP_CLK_MAGIC '='
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#define PTP_CLOCK_GETCAPS _IOR(PTP_CLK_MAGIC, 1, struct ptp_clock_caps)
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#define PTP_EXTTS_REQUEST _IOW(PTP_CLK_MAGIC, 2, struct ptp_extts_request)
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#define PTP_PEROUT_REQUEST _IOW(PTP_CLK_MAGIC, 3, struct ptp_perout_request)
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#define PTP_ENABLE_PPS _IOW(PTP_CLK_MAGIC, 4, int)
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#define PTP_SYS_OFFSET _IOW(PTP_CLK_MAGIC, 5, struct ptp_sys_offset)
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#define PTP_PIN_GETFUNC _IOWR(PTP_CLK_MAGIC, 6, struct ptp_pin_desc)
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#define PTP_PIN_SETFUNC _IOW(PTP_CLK_MAGIC, 7, struct ptp_pin_desc)
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#define PTP_SYS_OFFSET_PRECISE \
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_IOWR(PTP_CLK_MAGIC, 8, struct ptp_sys_offset_precise)
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#define PTP_SYS_OFFSET_EXTENDED \
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_IOWR(PTP_CLK_MAGIC, 9, struct ptp_sys_offset_extended)
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#define PTP_CLOCK_GETCAPS2 _IOR(PTP_CLK_MAGIC, 10, struct ptp_clock_caps)
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#define PTP_EXTTS_REQUEST2 _IOW(PTP_CLK_MAGIC, 11, struct ptp_extts_request)
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#define PTP_PEROUT_REQUEST2 _IOW(PTP_CLK_MAGIC, 12, struct ptp_perout_request)
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#define PTP_ENABLE_PPS2 _IOW(PTP_CLK_MAGIC, 13, int)
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#define PTP_SYS_OFFSET2 _IOW(PTP_CLK_MAGIC, 14, struct ptp_sys_offset)
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#define PTP_PIN_GETFUNC2 _IOWR(PTP_CLK_MAGIC, 15, struct ptp_pin_desc)
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#define PTP_PIN_SETFUNC2 _IOW(PTP_CLK_MAGIC, 16, struct ptp_pin_desc)
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#define PTP_SYS_OFFSET_PRECISE2 \
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_IOWR(PTP_CLK_MAGIC, 17, struct ptp_sys_offset_precise)
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#define PTP_SYS_OFFSET_EXTENDED2 \
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_IOWR(PTP_CLK_MAGIC, 18, struct ptp_sys_offset_extended)
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struct ptp_extts_event {
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struct ptp_clock_time t; /* Time event occured. */
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unsigned int index; /* Which channel produced the event. */
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unsigned int flags; /* Reserved for future use. */
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unsigned int rsv[2]; /* Reserved for future use. */
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};
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#endif
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