/* * 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 rsv[15]; /* 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_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) 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