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