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145 lines
4.0 KiB
145 lines
4.0 KiB
/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */ |
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/* |
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* linux/can/netlink.h |
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* |
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* Definitions for the CAN netlink interface |
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* |
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* Copyright (c) 2009 Wolfgang Grandegger <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the version 2 of the GNU General Public License |
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* as published by the Free Software Foundation |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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#ifndef _UAPI_CAN_NETLINK_H |
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#define _UAPI_CAN_NETLINK_H |
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#include <linux/types.h> |
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/* |
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* CAN bit-timing parameters |
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* |
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* For further information, please read chapter "8 BIT TIMING |
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* REQUIREMENTS" of the "Bosch CAN Specification version 2.0" |
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* at http://www.semiconductors.bosch.de/pdf/can2spec.pdf. |
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*/ |
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struct can_bittiming { |
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__u32 bitrate; /* Bit-rate in bits/second */ |
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__u32 sample_point; /* Sample point in one-tenth of a percent */ |
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__u32 tq; /* Time quanta (TQ) in nanoseconds */ |
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__u32 prop_seg; /* Propagation segment in TQs */ |
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__u32 phase_seg1; /* Phase buffer segment 1 in TQs */ |
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__u32 phase_seg2; /* Phase buffer segment 2 in TQs */ |
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__u32 sjw; /* Synchronisation jump width in TQs */ |
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__u32 brp; /* Bit-rate prescaler */ |
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}; |
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/* |
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* CAN hardware-dependent bit-timing constant |
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* |
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* Used for calculating and checking bit-timing parameters |
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*/ |
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struct can_bittiming_const { |
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char name[16]; /* Name of the CAN controller hardware */ |
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__u32 tseg1_min; /* Time segment 1 = prop_seg + phase_seg1 */ |
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__u32 tseg1_max; |
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__u32 tseg2_min; /* Time segment 2 = phase_seg2 */ |
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__u32 tseg2_max; |
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__u32 sjw_max; /* Synchronisation jump width */ |
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__u32 brp_min; /* Bit-rate prescaler */ |
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__u32 brp_max; |
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__u32 brp_inc; |
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}; |
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/* |
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* CAN clock parameters |
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*/ |
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struct can_clock { |
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__u32 freq; /* CAN system clock frequency in Hz */ |
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}; |
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/* |
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* CAN operational and error states |
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*/ |
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enum can_state { |
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CAN_STATE_ERROR_ACTIVE = 0, /* RX/TX error count < 96 */ |
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CAN_STATE_ERROR_WARNING, /* RX/TX error count < 128 */ |
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CAN_STATE_ERROR_PASSIVE, /* RX/TX error count < 256 */ |
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CAN_STATE_BUS_OFF, /* RX/TX error count >= 256 */ |
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CAN_STATE_STOPPED, /* Device is stopped */ |
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CAN_STATE_SLEEPING, /* Device is sleeping */ |
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CAN_STATE_MAX |
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}; |
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/* |
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* CAN bus error counters |
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*/ |
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struct can_berr_counter { |
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__u16 txerr; |
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__u16 rxerr; |
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}; |
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/* |
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* CAN controller mode |
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*/ |
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struct can_ctrlmode { |
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__u32 mask; |
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__u32 flags; |
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}; |
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#define CAN_CTRLMODE_LOOPBACK 0x01 /* Loopback mode */ |
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#define CAN_CTRLMODE_LISTENONLY 0x02 /* Listen-only mode */ |
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#define CAN_CTRLMODE_3_SAMPLES 0x04 /* Triple sampling mode */ |
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#define CAN_CTRLMODE_ONE_SHOT 0x08 /* One-Shot mode */ |
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#define CAN_CTRLMODE_BERR_REPORTING 0x10 /* Bus-error reporting */ |
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#define CAN_CTRLMODE_FD 0x20 /* CAN FD mode */ |
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#define CAN_CTRLMODE_PRESUME_ACK 0x40 /* Ignore missing CAN ACKs */ |
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#define CAN_CTRLMODE_FD_NON_ISO 0x80 /* CAN FD in non-ISO mode */ |
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#define CAN_CTRLMODE_CC_LEN8_DLC 0x100 /* Classic CAN DLC option */ |
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/* |
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* CAN device statistics |
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*/ |
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struct can_device_stats { |
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__u32 bus_error; /* Bus errors */ |
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__u32 error_warning; /* Changes to error warning state */ |
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__u32 error_passive; /* Changes to error passive state */ |
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__u32 bus_off; /* Changes to bus off state */ |
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__u32 arbitration_lost; /* Arbitration lost errors */ |
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__u32 restarts; /* CAN controller re-starts */ |
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}; |
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/* |
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* CAN netlink interface |
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*/ |
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enum { |
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IFLA_CAN_UNSPEC, |
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IFLA_CAN_BITTIMING, |
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IFLA_CAN_BITTIMING_CONST, |
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IFLA_CAN_CLOCK, |
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IFLA_CAN_STATE, |
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IFLA_CAN_CTRLMODE, |
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IFLA_CAN_RESTART_MS, |
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IFLA_CAN_RESTART, |
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IFLA_CAN_BERR_COUNTER, |
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IFLA_CAN_DATA_BITTIMING, |
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IFLA_CAN_DATA_BITTIMING_CONST, |
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IFLA_CAN_TERMINATION, |
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IFLA_CAN_TERMINATION_CONST, |
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IFLA_CAN_BITRATE_CONST, |
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IFLA_CAN_DATA_BITRATE_CONST, |
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IFLA_CAN_BITRATE_MAX, |
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__IFLA_CAN_MAX |
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}; |
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#define IFLA_CAN_MAX (__IFLA_CAN_MAX - 1) |
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/* u16 termination range: 1..65535 Ohms */ |
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#define CAN_TERMINATION_DISABLED 0 |
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#endif /* !_UAPI_CAN_NETLINK_H */
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