1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 /* 3 * PTP 1588 clock support - user space interface 4 * 5 * Copyright (C) 2010 OMICRON electronics GmbH 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 */ 21 22 #ifndef _PTP_CLOCK_H_ 23 #define _PTP_CLOCK_H_ 24 25 #include <linux/ioctl.h> 26 #include <linux/types.h> 27 28 /* 29 * Bits of the ptp_extts_request.flags field: 30 */ 31 #define PTP_ENABLE_FEATURE (1<<0) 32 #define PTP_RISING_EDGE (1<<1) 33 #define PTP_FALLING_EDGE (1<<2) 34 #define PTP_STRICT_FLAGS (1<<3) 35 #define PTP_EXTTS_EDGES (PTP_RISING_EDGE | PTP_FALLING_EDGE) 36 37 /* 38 * flag fields valid for the new PTP_EXTTS_REQUEST2 ioctl. 39 */ 40 #define PTP_EXTTS_VALID_FLAGS (PTP_ENABLE_FEATURE | \ 41 PTP_RISING_EDGE | \ 42 PTP_FALLING_EDGE | \ 43 PTP_STRICT_FLAGS) 44 45 /* 46 * flag fields valid for the original PTP_EXTTS_REQUEST ioctl. 47 * DO NOT ADD NEW FLAGS HERE. 48 */ 49 #define PTP_EXTTS_V1_VALID_FLAGS (PTP_ENABLE_FEATURE | \ 50 PTP_RISING_EDGE | \ 51 PTP_FALLING_EDGE) 52 53 /* 54 * Bits of the ptp_perout_request.flags field: 55 */ 56 #define PTP_PEROUT_ONE_SHOT (1<<0) 57 58 /* 59 * flag fields valid for the new PTP_PEROUT_REQUEST2 ioctl. 60 */ 61 #define PTP_PEROUT_VALID_FLAGS (PTP_PEROUT_ONE_SHOT) 62 63 /* 64 * No flags are valid for the original PTP_PEROUT_REQUEST ioctl 65 */ 66 #define PTP_PEROUT_V1_VALID_FLAGS (0) 67 68 /* 69 * struct ptp_clock_time - represents a time value 70 * 71 * The sign of the seconds field applies to the whole value. The 72 * nanoseconds field is always unsigned. The reserved field is 73 * included for sub-nanosecond resolution, should the demand for 74 * this ever appear. 75 * 76 */ 77 struct ptp_clock_time { 78 __s64 sec; /* seconds */ 79 __u32 nsec; /* nanoseconds */ 80 __u32 reserved; 81 }; 82 83 struct ptp_clock_caps { 84 int max_adj; /* Maximum frequency adjustment in parts per billon. */ 85 int n_alarm; /* Number of programmable alarms. */ 86 int n_ext_ts; /* Number of external time stamp channels. */ 87 int n_per_out; /* Number of programmable periodic signals. */ 88 int pps; /* Whether the clock supports a PPS callback. */ 89 int n_pins; /* Number of input/output pins. */ 90 /* Whether the clock supports precise system-device cross timestamps */ 91 int cross_timestamping; 92 int rsv[13]; /* Reserved for future use. */ 93 }; 94 95 struct ptp_extts_request { 96 unsigned int index; /* Which channel to configure. */ 97 unsigned int flags; /* Bit field for PTP_xxx flags. */ 98 unsigned int rsv[2]; /* Reserved for future use. */ 99 }; 100 101 struct ptp_perout_request { 102 struct ptp_clock_time start; /* Absolute start time. */ 103 struct ptp_clock_time period; /* Desired period, zero means disable. */ 104 unsigned int index; /* Which channel to configure. */ 105 unsigned int flags; 106 unsigned int rsv[4]; /* Reserved for future use. */ 107 }; 108 109 #define PTP_MAX_SAMPLES 25 /* Maximum allowed offset measurement samples. */ 110 111 struct ptp_sys_offset { 112 unsigned int n_samples; /* Desired number of measurements. */ 113 unsigned int rsv[3]; /* Reserved for future use. */ 114 /* 115 * Array of interleaved system/phc time stamps. The kernel 116 * will provide 2*n_samples + 1 time stamps, with the last 117 * one as a system time stamp. 118 */ 119 struct ptp_clock_time ts[2 * PTP_MAX_SAMPLES + 1]; 120 }; 121 122 struct ptp_sys_offset_extended { 123 unsigned int n_samples; /* Desired number of measurements. */ 124 unsigned int rsv[3]; /* Reserved for future use. */ 125 /* 126 * Array of [system, phc, system] time stamps. The kernel will provide 127 * 3*n_samples time stamps. 128 */ 129 struct ptp_clock_time ts[PTP_MAX_SAMPLES][3]; 130 }; 131 132 struct ptp_sys_offset_precise { 133 struct ptp_clock_time device; 134 struct ptp_clock_time sys_realtime; 135 struct ptp_clock_time sys_monoraw; 136 unsigned int rsv[4]; /* Reserved for future use. */ 137 }; 138 139 enum ptp_pin_function { 140 PTP_PF_NONE, 141 PTP_PF_EXTTS, 142 PTP_PF_PEROUT, 143 PTP_PF_PHYSYNC, 144 }; 145 146 struct ptp_pin_desc { 147 /* 148 * Hardware specific human readable pin name. This field is 149 * set by the kernel during the PTP_PIN_GETFUNC ioctl and is 150 * ignored for the PTP_PIN_SETFUNC ioctl. 151 */ 152 char name[64]; 153 /* 154 * Pin index in the range of zero to ptp_clock_caps.n_pins - 1. 155 */ 156 unsigned int index; 157 /* 158 * Which of the PTP_PF_xxx functions to use on this pin. 159 */ 160 unsigned int func; 161 /* 162 * The specific channel to use for this function. 163 * This corresponds to the 'index' field of the 164 * PTP_EXTTS_REQUEST and PTP_PEROUT_REQUEST ioctls. 165 */ 166 unsigned int chan; 167 /* 168 * Reserved for future use. 169 */ 170 unsigned int rsv[5]; 171 }; 172 173 #define PTP_CLK_MAGIC '=' 174 175 #define PTP_CLOCK_GETCAPS _IOR(PTP_CLK_MAGIC, 1, struct ptp_clock_caps) 176 #define PTP_EXTTS_REQUEST _IOW(PTP_CLK_MAGIC, 2, struct ptp_extts_request) 177 #define PTP_PEROUT_REQUEST _IOW(PTP_CLK_MAGIC, 3, struct ptp_perout_request) 178 #define PTP_ENABLE_PPS _IOW(PTP_CLK_MAGIC, 4, int) 179 #define PTP_SYS_OFFSET _IOW(PTP_CLK_MAGIC, 5, struct ptp_sys_offset) 180 #define PTP_PIN_GETFUNC _IOWR(PTP_CLK_MAGIC, 6, struct ptp_pin_desc) 181 #define PTP_PIN_SETFUNC _IOW(PTP_CLK_MAGIC, 7, struct ptp_pin_desc) 182 #define PTP_SYS_OFFSET_PRECISE \ 183 _IOWR(PTP_CLK_MAGIC, 8, struct ptp_sys_offset_precise) 184 #define PTP_SYS_OFFSET_EXTENDED \ 185 _IOWR(PTP_CLK_MAGIC, 9, struct ptp_sys_offset_extended) 186 187 #define PTP_CLOCK_GETCAPS2 _IOR(PTP_CLK_MAGIC, 10, struct ptp_clock_caps) 188 #define PTP_EXTTS_REQUEST2 _IOW(PTP_CLK_MAGIC, 11, struct ptp_extts_request) 189 #define PTP_PEROUT_REQUEST2 _IOW(PTP_CLK_MAGIC, 12, struct ptp_perout_request) 190 #define PTP_ENABLE_PPS2 _IOW(PTP_CLK_MAGIC, 13, int) 191 #define PTP_SYS_OFFSET2 _IOW(PTP_CLK_MAGIC, 14, struct ptp_sys_offset) 192 #define PTP_PIN_GETFUNC2 _IOWR(PTP_CLK_MAGIC, 15, struct ptp_pin_desc) 193 #define PTP_PIN_SETFUNC2 _IOW(PTP_CLK_MAGIC, 16, struct ptp_pin_desc) 194 #define PTP_SYS_OFFSET_PRECISE2 \ 195 _IOWR(PTP_CLK_MAGIC, 17, struct ptp_sys_offset_precise) 196 #define PTP_SYS_OFFSET_EXTENDED2 \ 197 _IOWR(PTP_CLK_MAGIC, 18, struct ptp_sys_offset_extended) 198 199 struct ptp_extts_event { 200 struct ptp_clock_time t; /* Time event occured. */ 201 unsigned int index; /* Which channel produced the event. */ 202 unsigned int flags; /* Reserved for future use. */ 203 unsigned int rsv[2]; /* Reserved for future use. */ 204 }; 205 206 #endif 207