/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* PTP 1588 clock support - user space interface
*
* Copyright (C) 2010 OMICRON electronics GmbH
*
* 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 _PTP_CLOCK_H_
#define _PTP_CLOCK_H_
#include <linux/ioctl.h>
#include <linux/types.h>
/*
* Bits of the ptp_extts_request.flags field:
*/
#define PTP_ENABLE_FEATURE (1<<0)
#define PTP_RISING_EDGE (1<<1)
#define PTP_FALLING_EDGE (1<<2)
#define PTP_STRICT_FLAGS (1<<3)
#define PTP_EXT_OFFSET (1<<4)
#define PTP_EXTTS_EDGES (PTP_RISING_EDGE | PTP_FALLING_EDGE)
/*
* flag fields valid for the new PTP_EXTTS_REQUEST2 ioctl.
*/
#define PTP_EXTTS_VALID_FLAGS (PTP_ENABLE_FEATURE | \
PTP_RISING_EDGE | \
PTP_FALLING_EDGE | \
PTP_STRICT_FLAGS | \
PTP_EXT_OFFSET)
/*
* flag fields valid for the original PTP_EXTTS_REQUEST ioctl.
* DO NOT ADD NEW FLAGS HERE.
*/
#define PTP_EXTTS_V1_VALID_FLAGS (PTP_ENABLE_FEATURE | \
PTP_RISING_EDGE | \
PTP_FALLING_EDGE)
/*
* flag fields valid for the ptp_extts_event report.
*/
#define PTP_EXTTS_EVENT_VALID (PTP_ENABLE_FEATURE)
/*
* Bits of the ptp_perout_request.flags field:
*/
#define PTP_PEROUT_ONE_SHOT (1<<0)
#define PTP_PEROUT_DUTY_CYCLE (1<<1)
#define PTP_PEROUT_PHASE (1<<2)
/*
* flag fields valid for the new PTP_PEROUT_REQUEST2 ioctl.
*/
#define PTP_PEROUT_VALID_FLAGS (PTP_PEROUT_ONE_SHOT | \
PTP_PEROUT_DUTY_CYCLE | \
PTP_PEROUT_PHASE)
/*
* No flags are valid for the original PTP_PEROUT_REQUEST ioctl
*/
#define PTP_PEROUT_V1_VALID_FLAGS (0)
/*
* struct ptp_clock_time - represents a time value
*
* The sign of the seconds field applies to the whole value. The
* nanoseconds field is always unsigned. The reserved field is
* included for sub-nanosecond resolution, should the demand for
* this ever appear.
*
*/
struct ptp_clock_time {
__s64 sec; /* seconds */
__u32 nsec; /* nanoseconds */
__u32 reserved;
};
struct ptp_clock_caps {
int max_adj; /* Maximum frequency adjustment in parts per billon. */
int n_alarm; /* Number of programmable alarms. */
int n_ext_ts; /* Number of external time stamp channels. */
int n_per_out; /* Number of programmable periodic signals. */
int pps; /* Whether the clock supports a PPS callback. */
int n_pins; /* Number of input/output pins. */
/* Whether the clock supports precise system-device cross timestamps */
int cross_timestamping;
/* Whether the clock supports adjust phase */
int adjust_phase;
int max_phase_adj; /* Maximum phase adjustment in nanoseconds. */
int rsv[11]; /* Reserved for future use. */
};
struct ptp_extts_request {
unsigned int index; /* Which channel to configure. */
unsigned int flags; /* Bit field for PTP_xxx flags. */
unsigned int rsv[2]; /* Reserved for future use. */
};
struct ptp_perout_request {
union {
/*
* Absolute start time.
* Valid only if (flags & PTP_PEROUT_PHASE) is unset.
*/
struct ptp_clock_time start;
/*
* Phase offset. The signal should start toggling at an
* unspecified integer multiple of the period, plus this value.
* The start time should be "as soon as possible".
* Valid only if (flags & PTP_PEROUT_PHASE) is set.
*/
struct ptp_clock_time phase;
};
struct ptp_clock_time period; /* Desired period, zero means disable. */
unsigned int index; /* Which channel to configure. */
unsigned int flags;
union {
/*
* The "on" time of the signal.
* Must be lower than the period.
* Valid only if (flags & PTP_PEROUT_DUTY_CYCLE) is set.
*/
struct ptp_clock_time on;
/* Reserved for future use. */
unsigned int rsv[4];
};
};
#define PTP_MAX_SAMPLES 25 /* Maximum allowed offset measurement samples. */
struct ptp_sys_offset {
unsigned int n_samples; /* Desired number of measurements. */
unsigned int rsv[3]; /* Reserved for future use. */
/*
* Array of interleaved system/phc time stamps. The kernel
* will provide 2*n_samples + 1 time stamps, with the last
* one as a system time stamp.
*/
struct ptp_clock_time ts[2 * PTP_MAX_SAMPLES + 1];
};
/*
* ptp_sys_offset_extended - data structure for IOCTL operation
* PTP_SYS_OFFSET_EXTENDED
*
* @n_samples: Desired number of measurements.
* @clockid: clockid of a clock-base used for pre/post timestamps.
* @rsv: Reserved for future use.
* @ts: Array of samples in the form [pre-TS, PHC, post-TS]. The
* kernel provides @n_samples.
*
* Starting from kernel 6.12 and onwards, the first word of the reserved-field
* is used for @clockid. That's backward compatible since previous kernel
* expect all three reserved words (@rsv[3]) to be 0 while the clockid (first
* word in the new structure) for CLOCK_REALTIME is '0'.
*/
struct ptp_sys_offset_extended {
unsigned int n_samples;
__kernel_clockid_t clockid;
unsigned int rsv[2];
struct ptp_clock_time ts[PTP_MAX_SAMPLES][3];
};
struct ptp_sys_offset_precise {
struct ptp_clock_time device;
struct ptp_clock_time sys_realtime;
struct ptp_clock_time sys_monoraw;
unsigned int rsv[4]; /* Reserved for future use. */
};
enum ptp_pin_function {
PTP_PF_NONE,
PTP_PF_EXTTS,
PTP_PF_PEROUT,
PTP_PF_PHYSYNC,
};
struct ptp_pin_desc {
/*
* Hardware specific human readable pin name. This field is
* set by the kernel during the PTP_PIN_GETFUNC ioctl and is
* ignored for the PTP_PIN_SETFUNC ioctl.
*/
char name[64];
/*
* Pin index in the range of zero to ptp_clock_caps.n_pins - 1.
*/
unsigned int index;
/*
* Which of the PTP_PF_xxx functions to use on this pin.
*/
unsigned int func;
/*
* The specific channel to use for this function.
* This corresponds to the 'index' field of the
* PTP_EXTTS_REQUEST and PTP_PEROUT_REQUEST ioctls.
*/
unsigned int chan;
/*
* Reserved for future use.
*/
unsigned int rsv[5];
};
#define PTP_CLK_MAGIC '='
#define PTP_CLOCK_GETCAPS _IOR(PTP_CLK_MAGIC, 1, struct ptp_clock_caps)
#define PTP_EXTTS_REQUEST _IOW(PTP_CLK_MAGIC, 2, struct ptp_extts_request)
#define PTP_PEROUT_REQUEST _IOW(PTP_CLK_MAGIC, 3, struct ptp_perout_request)
#define PTP_ENABLE_PPS _IOW(PTP_CLK_MAGIC, 4, int)
#define PTP_SYS_OFFSET _IOW(PTP_CLK_MAGIC, 5, struct ptp_sys_offset)
#define PTP_PIN_GETFUNC _IOWR(PTP_CLK_MAGIC, 6, struct ptp_pin_desc)
#define PTP_PIN_SETFUNC _IOW(PTP_CLK_MAGIC, 7, struct ptp_pin_desc)
#define PTP_SYS_OFFSET_PRECISE \
_IOWR(PTP_CLK_MAGIC, 8, struct ptp_sys_offset_precise)
#define PTP_SYS_OFFSET_EXTENDED \
_IOWR(PTP_CLK_MAGIC, 9, struct ptp_sys_offset_extended)
#define PTP_CLOCK_GETCAPS2 _IOR(PTP_CLK_MAGIC, 10, struct ptp_clock_caps)
#define PTP_EXTTS_REQUEST2 _IOW(PTP_CLK_MAGIC, 11, struct ptp_extts_request)
#define PTP_PEROUT_REQUEST2 _IOW(PTP_CLK_MAGIC, 12, struct ptp_perout_request)
#define PTP_ENABLE_PPS2 _IOW(PTP_CLK_MAGIC, 13, int)
#define PTP_SYS_OFFSET2 _IOW(PTP_CLK_MAGIC, 14, struct ptp_sys_offset)
#define PTP_PIN_GETFUNC2 _IOWR(PTP_CLK_MAGIC, 15, struct ptp_pin_desc)
#define PTP_PIN_SETFUNC2 _IOW(PTP_CLK_MAGIC, 16, struct ptp_pin_desc)
#define PTP_SYS_OFFSET_PRECISE2 \
_IOWR(PTP_CLK_MAGIC, 17, struct ptp_sys_offset_precise)
#define PTP_SYS_OFFSET_EXTENDED2 \
_IOWR(PTP_CLK_MAGIC, 18, struct ptp_sys_offset_extended)
#define PTP_MASK_CLEAR_ALL _IO(PTP_CLK_MAGIC, 19)
#define PTP_MASK_EN_SINGLE _IOW(PTP_CLK_MAGIC, 20, unsigned int)
struct ptp_extts_event {
struct ptp_clock_time t; /* Time event occurred. */
unsigned int index; /* Which channel produced the event. */
unsigned int flags; /* Event type. */
unsigned int rsv[2]; /* Reserved for future use. */
};
#endif
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