1 /* $NetBSD: can_link.h,v 1.2 2017/05/27 21:02:56 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Manuel Bouyer 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _NETCAN_CAN_LINK_H 33 #define _NETCAN_CAN_LINK_H 34 35 /* 36 * CAN bus link-layer related commands, from the SIOCSDRVSPEC 37 */ 38 39 /* get timing capabilities from HW */ 40 struct can_link_timecaps { 41 uint32_t cltc_prop_min; /* prop seg, in tq */ 42 uint32_t cltc_prop_max; 43 uint32_t cltc_ps1_min; /* phase1 seg, in tq */ 44 uint32_t cltc_ps1_max; 45 uint32_t cltc_ps2_min; /* phase 2 seg, in tq */ 46 uint32_t cltc_ps2_max; 47 uint32_t cltc_sjw_max; /* Synchronisation Jump Width */ 48 uint32_t cltc_brp_min; /* bit-rate prescaler */ 49 uint32_t cltc_brp_max; 50 uint32_t cltc_brp_inc; 51 uint32_t cltc_clock_freq; /* prescaler input clock, in hz */ 52 uint32_t cltc_linkmode_caps; /* link mode, see below */ 53 }; 54 #define CANGLINKTIMECAP 0 /* get struct can_link_timecaps */ 55 56 /* get/set timing parameters */ 57 struct can_link_timings { 58 uint32_t clt_brp; /* prescaler value */ 59 uint32_t clt_prop; /* Propagation segment in tq */ 60 uint32_t clt_ps1; /* Phase segment 1 in tq */ 61 uint32_t clt_ps2; /* Phase segment 2 in tq */ 62 uint32_t clt_sjw; /* Synchronisation jump width in tq */ 63 }; 64 #define CANGLINKTIMINGS 1 /* get struct can_link_timings */ 65 #define CANSLINKTIMINGS 2 /* set struct can_link_timings */ 66 67 /* link-level modes */ 68 #define CAN_LINKMODE_LOOPBACK 0x01 /* Loopback mode */ 69 #define CAN_LINKMODE_LISTENONLY 0x02 /* Listen-only mode */ 70 #define CAN_LINKMODE_3SAMPLES 0x04 /* Triple sampling mode */ 71 #define CAN_LINKMODE_PRESUME_ACK 0x08 /* Ignore missing CAN ACKs */ 72 #define CAN_IFFBITS \ 73 "\020\1LOOPBACK\2LISTENONLY\3TRIPLESAMPLE\4PRESUMEACK" 74 75 #define CANGLINKMODE 3 /* (uint32_t) get bits */ 76 #define CANSLINKMODE 4 /* (uint32_t) set bits */ 77 #define CANCLINKMODE 5 /* (uint32_t) clear bits */ 78 79 #endif /* _NETCAN_CAN_LINK_H */ 80 81