81 lines
3.2 KiB
C
81 lines
3.2 KiB
C
/* $NetBSD: can_link.h,v 1.2 2017/05/27 21:02:56 bouyer Exp $ */
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/*-
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* Copyright (c) 2017 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Manuel Bouyer
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _NETCAN_CAN_LINK_H
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#define _NETCAN_CAN_LINK_H
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/*
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* CAN bus link-layer related commands, from the SIOCSDRVSPEC
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*/
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/* get timing capabilities from HW */
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struct can_link_timecaps {
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uint32_t cltc_prop_min; /* prop seg, in tq */
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uint32_t cltc_prop_max;
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uint32_t cltc_ps1_min; /* phase1 seg, in tq */
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uint32_t cltc_ps1_max;
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uint32_t cltc_ps2_min; /* phase 2 seg, in tq */
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uint32_t cltc_ps2_max;
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uint32_t cltc_sjw_max; /* Synchronisation Jump Width */
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uint32_t cltc_brp_min; /* bit-rate prescaler */
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uint32_t cltc_brp_max;
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uint32_t cltc_brp_inc;
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uint32_t cltc_clock_freq; /* prescaler input clock, in hz */
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uint32_t cltc_linkmode_caps; /* link mode, see below */
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};
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#define CANGLINKTIMECAP 0 /* get struct can_link_timecaps */
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/* get/set timing parameters */
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struct can_link_timings {
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uint32_t clt_brp; /* prescaler value */
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uint32_t clt_prop; /* Propagation segment in tq */
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uint32_t clt_ps1; /* Phase segment 1 in tq */
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uint32_t clt_ps2; /* Phase segment 2 in tq */
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uint32_t clt_sjw; /* Synchronisation jump width in tq */
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};
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#define CANGLINKTIMINGS 1 /* get struct can_link_timings */
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#define CANSLINKTIMINGS 2 /* set struct can_link_timings */
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/* link-level modes */
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#define CAN_LINKMODE_LOOPBACK 0x01 /* Loopback mode */
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#define CAN_LINKMODE_LISTENONLY 0x02 /* Listen-only mode */
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#define CAN_LINKMODE_3SAMPLES 0x04 /* Triple sampling mode */
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#define CAN_LINKMODE_PRESUME_ACK 0x08 /* Ignore missing CAN ACKs */
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#define CAN_IFFBITS \
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"\020\1LOOPBACK\2LISTENONLY\3TRIPLESAMPLE\4PRESUMEACK"
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#define CANGLINKMODE 3 /* (uint32_t) get bits */
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#define CANSLINKMODE 4 /* (uint32_t) set bits */
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#define CANCLINKMODE 5 /* (uint32_t) clear bits */
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#endif /* _NETCAN_CAN_LINK_H */
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