netlink.h (5150B)
1/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */ 2/* 3 * linux/can/netlink.h 4 * 5 * Definitions for the CAN netlink interface 6 * 7 * Copyright (c) 2009 Wolfgang Grandegger <wg@grandegger.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the version 2 of the GNU General Public License 11 * as published by the Free Software Foundation 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 */ 18 19#ifndef _UAPI_CAN_NETLINK_H 20#define _UAPI_CAN_NETLINK_H 21 22#include <linux/types.h> 23 24/* 25 * CAN bit-timing parameters 26 * 27 * For further information, please read chapter "8 BIT TIMING 28 * REQUIREMENTS" of the "Bosch CAN Specification version 2.0" 29 * at http://www.semiconductors.bosch.de/pdf/can2spec.pdf. 30 */ 31struct can_bittiming { 32 __u32 bitrate; /* Bit-rate in bits/second */ 33 __u32 sample_point; /* Sample point in one-tenth of a percent */ 34 __u32 tq; /* Time quanta (TQ) in nanoseconds */ 35 __u32 prop_seg; /* Propagation segment in TQs */ 36 __u32 phase_seg1; /* Phase buffer segment 1 in TQs */ 37 __u32 phase_seg2; /* Phase buffer segment 2 in TQs */ 38 __u32 sjw; /* Synchronisation jump width in TQs */ 39 __u32 brp; /* Bit-rate prescaler */ 40}; 41 42/* 43 * CAN hardware-dependent bit-timing constant 44 * 45 * Used for calculating and checking bit-timing parameters 46 */ 47struct can_bittiming_const { 48 char name[16]; /* Name of the CAN controller hardware */ 49 __u32 tseg1_min; /* Time segment 1 = prop_seg + phase_seg1 */ 50 __u32 tseg1_max; 51 __u32 tseg2_min; /* Time segment 2 = phase_seg2 */ 52 __u32 tseg2_max; 53 __u32 sjw_max; /* Synchronisation jump width */ 54 __u32 brp_min; /* Bit-rate prescaler */ 55 __u32 brp_max; 56 __u32 brp_inc; 57}; 58 59/* 60 * CAN clock parameters 61 */ 62struct can_clock { 63 __u32 freq; /* CAN system clock frequency in Hz */ 64}; 65 66/* 67 * CAN operational and error states 68 */ 69enum can_state { 70 CAN_STATE_ERROR_ACTIVE = 0, /* RX/TX error count < 96 */ 71 CAN_STATE_ERROR_WARNING, /* RX/TX error count < 128 */ 72 CAN_STATE_ERROR_PASSIVE, /* RX/TX error count < 256 */ 73 CAN_STATE_BUS_OFF, /* RX/TX error count >= 256 */ 74 CAN_STATE_STOPPED, /* Device is stopped */ 75 CAN_STATE_SLEEPING, /* Device is sleeping */ 76 CAN_STATE_MAX 77}; 78 79/* 80 * CAN bus error counters 81 */ 82struct can_berr_counter { 83 __u16 txerr; 84 __u16 rxerr; 85}; 86 87/* 88 * CAN controller mode 89 */ 90struct can_ctrlmode { 91 __u32 mask; 92 __u32 flags; 93}; 94 95#define CAN_CTRLMODE_LOOPBACK 0x01 /* Loopback mode */ 96#define CAN_CTRLMODE_LISTENONLY 0x02 /* Listen-only mode */ 97#define CAN_CTRLMODE_3_SAMPLES 0x04 /* Triple sampling mode */ 98#define CAN_CTRLMODE_ONE_SHOT 0x08 /* One-Shot mode */ 99#define CAN_CTRLMODE_BERR_REPORTING 0x10 /* Bus-error reporting */ 100#define CAN_CTRLMODE_FD 0x20 /* CAN FD mode */ 101#define CAN_CTRLMODE_PRESUME_ACK 0x40 /* Ignore missing CAN ACKs */ 102#define CAN_CTRLMODE_FD_NON_ISO 0x80 /* CAN FD in non-ISO mode */ 103#define CAN_CTRLMODE_CC_LEN8_DLC 0x100 /* Classic CAN DLC option */ 104#define CAN_CTRLMODE_TDC_AUTO 0x200 /* CAN transiver automatically calculates TDCV */ 105#define CAN_CTRLMODE_TDC_MANUAL 0x400 /* TDCV is manually set up by user */ 106 107/* 108 * CAN device statistics 109 */ 110struct can_device_stats { 111 __u32 bus_error; /* Bus errors */ 112 __u32 error_warning; /* Changes to error warning state */ 113 __u32 error_passive; /* Changes to error passive state */ 114 __u32 bus_off; /* Changes to bus off state */ 115 __u32 arbitration_lost; /* Arbitration lost errors */ 116 __u32 restarts; /* CAN controller re-starts */ 117}; 118 119/* 120 * CAN netlink interface 121 */ 122enum { 123 IFLA_CAN_UNSPEC, 124 IFLA_CAN_BITTIMING, 125 IFLA_CAN_BITTIMING_CONST, 126 IFLA_CAN_CLOCK, 127 IFLA_CAN_STATE, 128 IFLA_CAN_CTRLMODE, 129 IFLA_CAN_RESTART_MS, 130 IFLA_CAN_RESTART, 131 IFLA_CAN_BERR_COUNTER, 132 IFLA_CAN_DATA_BITTIMING, 133 IFLA_CAN_DATA_BITTIMING_CONST, 134 IFLA_CAN_TERMINATION, 135 IFLA_CAN_TERMINATION_CONST, 136 IFLA_CAN_BITRATE_CONST, 137 IFLA_CAN_DATA_BITRATE_CONST, 138 IFLA_CAN_BITRATE_MAX, 139 IFLA_CAN_TDC, 140 IFLA_CAN_CTRLMODE_EXT, 141 142 /* add new constants above here */ 143 __IFLA_CAN_MAX, 144 IFLA_CAN_MAX = __IFLA_CAN_MAX - 1 145}; 146 147/* 148 * CAN FD Transmitter Delay Compensation (TDC) 149 * 150 * Please refer to struct can_tdc_const and can_tdc in 151 * include/linux/can/bittiming.h for further details. 152 */ 153enum { 154 IFLA_CAN_TDC_UNSPEC, 155 IFLA_CAN_TDC_TDCV_MIN, /* u32 */ 156 IFLA_CAN_TDC_TDCV_MAX, /* u32 */ 157 IFLA_CAN_TDC_TDCO_MIN, /* u32 */ 158 IFLA_CAN_TDC_TDCO_MAX, /* u32 */ 159 IFLA_CAN_TDC_TDCF_MIN, /* u32 */ 160 IFLA_CAN_TDC_TDCF_MAX, /* u32 */ 161 IFLA_CAN_TDC_TDCV, /* u32 */ 162 IFLA_CAN_TDC_TDCO, /* u32 */ 163 IFLA_CAN_TDC_TDCF, /* u32 */ 164 165 /* add new constants above here */ 166 __IFLA_CAN_TDC, 167 IFLA_CAN_TDC_MAX = __IFLA_CAN_TDC - 1 168}; 169 170/* 171 * IFLA_CAN_CTRLMODE_EXT nest: controller mode extended parameters 172 */ 173enum { 174 IFLA_CAN_CTRLMODE_UNSPEC, 175 IFLA_CAN_CTRLMODE_SUPPORTED, /* u32 */ 176 177 /* add new constants above here */ 178 __IFLA_CAN_CTRLMODE, 179 IFLA_CAN_CTRLMODE_MAX = __IFLA_CAN_CTRLMODE - 1 180}; 181 182/* u16 termination range: 1..65535 Ohms */ 183#define CAN_TERMINATION_DISABLED 0 184 185#endif /* !_UAPI_CAN_NETLINK_H */