/* 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 .
*
* Note : PTP_STRICT_FLAGS is always enabled by the kernel for
* PTP_EXTTS_REQUEST2 regardless of whether it is set by userspace .
*/
#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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