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/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
/*
 * linux/can/error.h
 *
 * Definitions of the CAN error messages to be filtered and passed to the user.
 *
 * Author: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
 * All rights reserved.
 *
 * 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.
 * 3. Neither the name of Volkswagen nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * Alternatively, provided that this notice is retained in full, this
 * software may be distributed under the terms of the GNU General
 * Public License ("GPL") version 2, in which case the provisions of the
 * GPL apply INSTEAD OF those given above.
 *
 * The provided data structures and external interfaces from this code
 * are not restricted to be used by modules with a GPL compatible license.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
 * OWNER 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 _CAN_ERROR_H
#define _CAN_ERROR_H

#define CAN_ERR_DLC 8 /* dlc for error message frames */

/* error class (mask) in can_id */
#define CAN_ERR_TX_TIMEOUT   0x00000001U /* TX timeout (by netdevice driver) */
#define CAN_ERR_LOSTARB      0x00000002U /* lost arbitration    / data[0]    */
#define CAN_ERR_CRTL         0x00000004U /* controller problems / data[1]    */
#define CAN_ERR_PROT         0x00000008U /* protocol violations / data[2..3] */
#define CAN_ERR_TRX          0x00000010U /* transceiver status  / data[4]    */
#define CAN_ERR_ACK          0x00000020U /* received no ACK on transmission */
#define CAN_ERR_BUSOFF       0x00000040U /* bus off */
#define CAN_ERR_BUSERROR     0x00000080U /* bus error (may flood!) */
#define CAN_ERR_RESTARTED    0x00000100U /* controller restarted */

/* arbitration lost in bit ... / data[0] */
#define CAN_ERR_LOSTARB_UNSPEC   0x00 /* unspecified */
				      /* else bit number in bitstream */

/* error status of CAN-controller / data[1] */
#define CAN_ERR_CRTL_UNSPEC      0x00 /* unspecified */
#define CAN_ERR_CRTL_RX_OVERFLOW 0x01 /* RX buffer overflow */
#define CAN_ERR_CRTL_TX_OVERFLOW 0x02 /* TX buffer overflow */
#define CAN_ERR_CRTL_RX_WARNING  0x04 /* reached warning level for RX errors */
#define CAN_ERR_CRTL_TX_WARNING  0x08 /* reached warning level for TX errors */
#define CAN_ERR_CRTL_RX_PASSIVE  0x10 /* reached error passive status RX */
#define CAN_ERR_CRTL_TX_PASSIVE  0x20 /* reached error passive status TX */
				      /* (at least one error counter exceeds */
				      /* the protocol-defined level of 127)  */
#define CAN_ERR_CRTL_ACTIVE      0x40 /* recovered to error active state */

/* error in CAN protocol (type) / data[2] */
#define CAN_ERR_PROT_UNSPEC      0x00 /* unspecified */
#define CAN_ERR_PROT_BIT         0x01 /* single bit error */
#define CAN_ERR_PROT_FORM        0x02 /* frame format error */
#define CAN_ERR_PROT_STUFF       0x04 /* bit stuffing error */
#define CAN_ERR_PROT_BIT0        0x08 /* unable to send dominant bit */
#define CAN_ERR_PROT_BIT1        0x10 /* unable to send recessive bit */
#define CAN_ERR_PROT_OVERLOAD    0x20 /* bus overload */
#define CAN_ERR_PROT_ACTIVE      0x40 /* active error announcement */
#define CAN_ERR_PROT_TX          0x80 /* error occurred on transmission */

/* error in CAN protocol (location) / data[3] */
#define CAN_ERR_PROT_LOC_UNSPEC  0x00 /* unspecified */
#define CAN_ERR_PROT_LOC_SOF     0x03 /* start of frame */
#define CAN_ERR_PROT_LOC_ID28_21 0x02 /* ID bits 28 - 21 (SFF: 10 - 3) */
#define CAN_ERR_PROT_LOC_ID20_18 0x06 /* ID bits 20 - 18 (SFF: 2 - 0 )*/
#define CAN_ERR_PROT_LOC_SRTR    0x04 /* substitute RTR (SFF: RTR) */
#define CAN_ERR_PROT_LOC_IDE     0x05 /* identifier extension */
#define CAN_ERR_PROT_LOC_ID17_13 0x07 /* ID bits 17-13 */
#define CAN_ERR_PROT_LOC_ID12_05 0x0F /* ID bits 12-5 */
#define CAN_ERR_PROT_LOC_ID04_00 0x0E /* ID bits 4-0 */
#define CAN_ERR_PROT_LOC_RTR     0x0C /* RTR */
#define CAN_ERR_PROT_LOC_RES1    0x0D /* reserved bit 1 */
#define CAN_ERR_PROT_LOC_RES0    0x09 /* reserved bit 0 */
#define CAN_ERR_PROT_LOC_DLC     0x0B /* data length code */
#define CAN_ERR_PROT_LOC_DATA    0x0A /* data section */
#define CAN_ERR_PROT_LOC_CRC_SEQ 0x08 /* CRC sequence */
#define CAN_ERR_PROT_LOC_CRC_DEL 0x18 /* CRC delimiter */
#define CAN_ERR_PROT_LOC_ACK     0x19 /* ACK slot */
#define CAN_ERR_PROT_LOC_ACK_DEL 0x1B /* ACK delimiter */
#define CAN_ERR_PROT_LOC_EOF     0x1A /* end of frame */
#define CAN_ERR_PROT_LOC_INTERM  0x12 /* intermission */

/* error status of CAN-transceiver / data[4] */
/*                                             CANH CANL */
#define CAN_ERR_TRX_UNSPEC             0x00 /* 0000 0000 */
#define CAN_ERR_TRX_CANH_NO_WIRE       0x04 /* 0000 0100 */
#define CAN_ERR_TRX_CANH_SHORT_TO_BAT  0x05 /* 0000 0101 */
#define CAN_ERR_TRX_CANH_SHORT_TO_VCC  0x06 /* 0000 0110 */
#define CAN_ERR_TRX_CANH_SHORT_TO_GND  0x07 /* 0000 0111 */
#define CAN_ERR_TRX_CANL_NO_WIRE       0x40 /* 0100 0000 */
#define CAN_ERR_TRX_CANL_SHORT_TO_BAT  0x50 /* 0101 0000 */
#define CAN_ERR_TRX_CANL_SHORT_TO_VCC  0x60 /* 0110 0000 */
#define CAN_ERR_TRX_CANL_SHORT_TO_GND  0x70 /* 0111 0000 */
#define CAN_ERR_TRX_CANL_SHORT_TO_CANH 0x80 /* 1000 0000 */

/* controller specific additional information / data[5..7] */

#endif /* _CAN_ERROR_H */
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