/* SPDX-License-Identifier: GPL-2.0 */ /* Driver for ETAS GmbH ES58X USB CAN(-FD) Bus Interfaces. * * File es58x_fd.h: Definitions and declarations specific to ETAS * ES582.1 and ES584.1 (naming convention: we use the term "ES58X FD" * when referring to those two variants together). * * Copyright (c) 2019 Robert Bosch Engineering and Business Solutions. All rights reserved. * Copyright (c) 2020 ETAS K.K.. All rights reserved. * Copyright (c) 2020, 2021 Vincent Mailhol <[email protected]> */ #ifndef __ES58X_FD_H__ #define __ES58X_FD_H__ #include <linux/types.h> #define ES582_1_NUM_CAN_CH … #define ES584_1_NUM_CAN_CH … #define ES58X_FD_NUM_CAN_CH … #define ES58X_FD_CHANNEL_IDX_OFFSET … #define ES58X_FD_TX_BULK_MAX … #define ES58X_FD_RX_BULK_MAX … #define ES58X_FD_ECHO_BULK_MAX … enum es58x_fd_cmd_type { … }; /* Command IDs for ES58X_FD_CMD_TYPE_{CAN,CANFD}. */ enum es58x_fd_can_cmd_id { … }; /* Command IDs for ES58X_FD_CMD_TYPE_DEVICE. */ enum es58x_fd_dev_cmd_id { … }; /** * enum es58x_fd_ctrlmode - Controller mode. * @ES58X_FD_CTRLMODE_ACTIVE: send and receive messages. * @ES58X_FD_CTRLMODE_PASSIVE: only receive messages (monitor). Do not * send anything, not even the acknowledgment bit. * @ES58X_FD_CTRLMODE_FD: CAN FD according to ISO11898-1. * @ES58X_FD_CTRLMODE_FD_NON_ISO: follow Bosch CAN FD Specification * V1.0 * @ES58X_FD_CTRLMODE_DISABLE_PROTOCOL_EXCEPTION_HANDLING: How to * behave when CAN FD reserved bit is monitored as * dominant. (c.f. ISO 11898-1:2015, section 10.4.2.4 "Control * field", paragraph "r0 bit"). 0 (not disable = enable): send * error frame. 1 (disable): goes into bus integration mode * (c.f. below). * @ES58X_FD_CTRLMODE_EDGE_FILTER_DURING_BUS_INTEGRATION: 0: Edge * filtering is disabled. 1: Edge filtering is enabled. Two * consecutive dominant bits required to detect an edge for hard * synchronization. */ enum es58x_fd_ctrlmode { … }; struct es58x_fd_bittiming { … } __packed; /** * struct es58x_fd_tx_conf_msg - Channel configuration. * @nominal_bittiming: Nominal bittiming. * @samples_per_bit: type enum es58x_samples_per_bit. * @sync_edge: type enum es58x_sync_edge. * @physical_layer: type enum es58x_physical_layer. * @echo_mode: type enum es58x_echo_mode. * @ctrlmode: type enum es58x_fd_ctrlmode. * @canfd_enabled: boolean (0: Classical CAN, 1: CAN and/or CANFD). * @data_bittiming: Bittiming for flexible data-rate transmission. * @tdc_enabled: Transmitter Delay Compensation switch (0: TDC is * disabled, 1: TDC is enabled). * @tdco: Transmitter Delay Compensation Offset. * @tdcf: Transmitter Delay Compensation Filter window. * * Please refer to the microcontroller datasheet: "SAM E70/S70/V70/V71 * Family" section 49 "Controller Area Network (MCAN)" for additional * information. */ struct es58x_fd_tx_conf_msg { … } __packed; #define ES58X_FD_CAN_CONF_LEN … #define ES58X_FD_CANFD_CONF_LEN … struct es58x_fd_tx_can_msg { … } __packed; #define ES58X_FD_CAN_TX_LEN … #define ES58X_FD_CANFD_TX_LEN … struct es58x_fd_rx_can_msg { … } __packed; #define ES58X_FD_CAN_RX_LEN … #define ES58X_FD_CANFD_RX_LEN … struct es58x_fd_echo_msg { … } __packed; struct es58x_fd_rx_event_msg { … } __packed; struct es58x_fd_tx_ack_msg { … } __packed; /** * struct es58x_fd_urb_cmd - Commands received from or sent to the * ES58X FD device. * @SOF: Start of Frame. * @cmd_type: Command Type (type: enum es58x_fd_cmd_type). The CRC * calculation starts at this position. * @cmd_id: Command ID (type: enum es58x_fd_cmd_id). * @channel_idx: Channel index starting at 0. * @msg_len: Length of the message, excluding CRC (i.e. length of the * union). * @tx_conf_msg: Channel configuration. * @tx_can_msg_buf: Concatenation of Tx messages. Type is "u8[]" * instead of "struct es58x_fd_tx_msg[]" because the structure * has a flexible size. * @rx_can_msg_buf: Concatenation Rx messages. Type is "u8[]" instead * of "struct es58x_fd_rx_msg[]" because the structure has a * flexible size. * @echo_msg: Array of echo messages (e.g. Tx messages being looped * back). * @rx_event_msg: Error or event message. * @tx_ack_msg: Tx acknowledgment message. * @timestamp: Timestamp reply. * @rx_cmd_ret_le32: Rx 32 bits return code (type: enum * es58x_cmd_ret_code_u32). * @raw_msg: Message raw payload. * @reserved_for_crc16_do_not_use: The structure ends with a * CRC16. Because the structures in above union are of variable * lengths, we can not predict the offset of the CRC in * advance. Use functions es58x_get_crc() and es58x_set_crc() to * manipulate it. */ struct es58x_fd_urb_cmd { … } __packed; #define ES58X_FD_URB_CMD_HEADER_LEN … #define ES58X_FD_TX_URB_CMD_MAX_LEN … #define ES58X_FD_RX_URB_CMD_MAX_LEN … #endif /* __ES58X_FD_H__ */
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