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ptp_clock.h
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/* * 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> /* PTP_xxx bits, for the flags field within the request structures. */ #define PTP_ENABLE_FEATURE (1<<0) #define PTP_RISING_EDGE (1<<1) #define PTP_FALLING_EDGE (1<<2) /* * 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; int rsv[13]; /* 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 { struct ptp_clock_time start; /* Absolute start time. */ struct ptp_clock_time period; /* Desired period, zero means disable. */ unsigned int index; /* Which channel to configure. */ unsigned int flags; /* Reserved for future use. */ unsigned int rsv[4]; /* Reserved for future use. */ }; #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]; }; struct ptp_sys_offset_extended { unsigned int n_samples; /* Desired number of measurements. */ unsigned int rsv[3]; /* Reserved for future use. */ /* * Array of [system, phc, system] time stamps. The kernel will provide * 3*n_samples time stamps. */ 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) struct ptp_extts_event { struct ptp_clock_time t; /* Time event occured. */ unsigned int index; /* Which channel produced the event. */ unsigned int flags; /* Reserved for future use. */ unsigned int rsv[2]; /* Reserved for future use. */ }; #endif