1 /* SPDX-License-Identifier: ((GPL-2.0-only WITH Linux-syscall-note) OR BSD-3-Clause) */
2 /*
3  * linux/can/error.h
4  *
5  * Definitions of the CAN error messages to be filtered and passed to the user.
6  *
7  * Author: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
8  * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  * 3. Neither the name of Volkswagen nor the names of its contributors
20  *    may be used to endorse or promote products derived from this software
21  *    without specific prior written permission.
22  *
23  * Alternatively, provided that this notice is retained in full, this
24  * software may be distributed under the terms of the GNU General
25  * Public License ("GPL") version 2, in which case the provisions of the
26  * GPL apply INSTEAD OF those given above.
27  *
28  * The provided data structures and external interfaces from this code
29  * are not restricted to be used by modules with a GPL compatible license.
30  *
31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
36  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
37  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
38  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
39  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
40  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
41  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
42  * DAMAGE.
43  */
44 
45 #ifndef _UAPI_CAN_ERROR_H
46 #define _UAPI_CAN_ERROR_H
47 
48 #define CAN_ERR_DLC 8 /* dlc for error message frames */
49 
50 /* error class (mask) in can_id */
51 #define CAN_ERR_TX_TIMEOUT   0x00000001U /* TX timeout (by netdevice driver) */
52 #define CAN_ERR_LOSTARB      0x00000002U /* lost arbitration    / data[0]    */
53 #define CAN_ERR_CRTL         0x00000004U /* controller problems / data[1]    */
54 #define CAN_ERR_PROT         0x00000008U /* protocol violations / data[2..3] */
55 #define CAN_ERR_TRX          0x00000010U /* transceiver status  / data[4]    */
56 #define CAN_ERR_ACK          0x00000020U /* received no ACK on transmission */
57 #define CAN_ERR_BUSOFF       0x00000040U /* bus off */
58 #define CAN_ERR_BUSERROR     0x00000080U /* bus error (may flood!) */
59 #define CAN_ERR_RESTARTED    0x00000100U /* controller restarted */
60 #define CAN_ERR_CNT          0x00000200U /* TX error counter / data[6] */
61 					 /* RX error counter / data[7] */
62 
63 /* arbitration lost in bit ... / data[0] */
64 #define CAN_ERR_LOSTARB_UNSPEC   0x00 /* unspecified */
65 				      /* else bit number in bitstream */
66 
67 /* error status of CAN-controller / data[1] */
68 #define CAN_ERR_CRTL_UNSPEC      0x00 /* unspecified */
69 #define CAN_ERR_CRTL_RX_OVERFLOW 0x01 /* RX buffer overflow */
70 #define CAN_ERR_CRTL_TX_OVERFLOW 0x02 /* TX buffer overflow */
71 #define CAN_ERR_CRTL_RX_WARNING  0x04 /* reached warning level for RX errors */
72 #define CAN_ERR_CRTL_TX_WARNING  0x08 /* reached warning level for TX errors */
73 #define CAN_ERR_CRTL_RX_PASSIVE  0x10 /* reached error passive status RX */
74 #define CAN_ERR_CRTL_TX_PASSIVE  0x20 /* reached error passive status TX */
75 				      /* (at least one error counter exceeds */
76 				      /* the protocol-defined level of 127)  */
77 #define CAN_ERR_CRTL_ACTIVE      0x40 /* recovered to error active state */
78 
79 /* error in CAN protocol (type) / data[2] */
80 #define CAN_ERR_PROT_UNSPEC      0x00 /* unspecified */
81 #define CAN_ERR_PROT_BIT         0x01 /* single bit error */
82 #define CAN_ERR_PROT_FORM        0x02 /* frame format error */
83 #define CAN_ERR_PROT_STUFF       0x04 /* bit stuffing error */
84 #define CAN_ERR_PROT_BIT0        0x08 /* unable to send dominant bit */
85 #define CAN_ERR_PROT_BIT1        0x10 /* unable to send recessive bit */
86 #define CAN_ERR_PROT_OVERLOAD    0x20 /* bus overload */
87 #define CAN_ERR_PROT_ACTIVE      0x40 /* active error announcement */
88 #define CAN_ERR_PROT_TX          0x80 /* error occurred on transmission */
89 
90 /* error in CAN protocol (location) / data[3] */
91 #define CAN_ERR_PROT_LOC_UNSPEC  0x00 /* unspecified */
92 #define CAN_ERR_PROT_LOC_SOF     0x03 /* start of frame */
93 #define CAN_ERR_PROT_LOC_ID28_21 0x02 /* ID bits 28 - 21 (SFF: 10 - 3) */
94 #define CAN_ERR_PROT_LOC_ID20_18 0x06 /* ID bits 20 - 18 (SFF: 2 - 0 )*/
95 #define CAN_ERR_PROT_LOC_SRTR    0x04 /* substitute RTR (SFF: RTR) */
96 #define CAN_ERR_PROT_LOC_IDE     0x05 /* identifier extension */
97 #define CAN_ERR_PROT_LOC_ID17_13 0x07 /* ID bits 17-13 */
98 #define CAN_ERR_PROT_LOC_ID12_05 0x0F /* ID bits 12-5 */
99 #define CAN_ERR_PROT_LOC_ID04_00 0x0E /* ID bits 4-0 */
100 #define CAN_ERR_PROT_LOC_RTR     0x0C /* RTR */
101 #define CAN_ERR_PROT_LOC_RES1    0x0D /* reserved bit 1 */
102 #define CAN_ERR_PROT_LOC_RES0    0x09 /* reserved bit 0 */
103 #define CAN_ERR_PROT_LOC_DLC     0x0B /* data length code */
104 #define CAN_ERR_PROT_LOC_DATA    0x0A /* data section */
105 #define CAN_ERR_PROT_LOC_CRC_SEQ 0x08 /* CRC sequence */
106 #define CAN_ERR_PROT_LOC_CRC_DEL 0x18 /* CRC delimiter */
107 #define CAN_ERR_PROT_LOC_ACK     0x19 /* ACK slot */
108 #define CAN_ERR_PROT_LOC_ACK_DEL 0x1B /* ACK delimiter */
109 #define CAN_ERR_PROT_LOC_EOF     0x1A /* end of frame */
110 #define CAN_ERR_PROT_LOC_INTERM  0x12 /* intermission */
111 
112 /* error status of CAN-transceiver / data[4] */
113 /*                                             CANH CANL */
114 #define CAN_ERR_TRX_UNSPEC             0x00 /* 0000 0000 */
115 #define CAN_ERR_TRX_CANH_NO_WIRE       0x04 /* 0000 0100 */
116 #define CAN_ERR_TRX_CANH_SHORT_TO_BAT  0x05 /* 0000 0101 */
117 #define CAN_ERR_TRX_CANH_SHORT_TO_VCC  0x06 /* 0000 0110 */
118 #define CAN_ERR_TRX_CANH_SHORT_TO_GND  0x07 /* 0000 0111 */
119 #define CAN_ERR_TRX_CANL_NO_WIRE       0x40 /* 0100 0000 */
120 #define CAN_ERR_TRX_CANL_SHORT_TO_BAT  0x50 /* 0101 0000 */
121 #define CAN_ERR_TRX_CANL_SHORT_TO_VCC  0x60 /* 0110 0000 */
122 #define CAN_ERR_TRX_CANL_SHORT_TO_GND  0x70 /* 0111 0000 */
123 #define CAN_ERR_TRX_CANL_SHORT_TO_CANH 0x80 /* 1000 0000 */
124 
125 /* data[5] is reserved (do not use) */
126 
127 /* TX error counter / data[6] */
128 /* RX error counter / data[7] */
129 
130 /* CAN state thresholds
131  *
132  * Error counter	Error state
133  * -----------------------------------
134  * 0 -  95		Error-active
135  * 96 - 127		Error-warning
136  * 128 - 255		Error-passive
137  * 256 and greater	Bus-off
138  */
139 #define CAN_ERROR_WARNING_THRESHOLD 96
140 #define CAN_ERROR_PASSIVE_THRESHOLD 128
141 #define CAN_BUS_OFF_THRESHOLD 256
142 
143 #endif /* _UAPI_CAN_ERROR_H */
144