[CAN]: Add PF_CAN core module (0d66548a) · Commits · 戴 / test

include/linux/can.h

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		/*
		* linux/can.h
		*
		* Definitions for CAN network layer (socket addr / CAN frame / CAN filter)
		*
		* Authors: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
		* Urs Thuermann <urs.thuermann@volkswagen.de>
		* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
		* All rights reserved.
		*
		* Send feedback to <socketcan-users@lists.berlios.de>
		*
		*/

		#ifndef CAN_H
		#define CAN_H

		#include <linux/types.h>
		#include <linux/socket.h>

		/* controller area network (CAN) kernel definitions */

		/* special address description flags for the CAN_ID */
		#define CAN_EFF_FLAG 0x80000000U /* EFF/SFF is set in the MSB */
		#define CAN_RTR_FLAG 0x40000000U /* remote transmission request */
		#define CAN_ERR_FLAG 0x20000000U /* error frame */

		/* valid bits in CAN ID for frame formats */
		#define CAN_SFF_MASK 0x000007FFU /* standard frame format (SFF) */
		#define CAN_EFF_MASK 0x1FFFFFFFU /* extended frame format (EFF) */
		#define CAN_ERR_MASK 0x1FFFFFFFU /* omit EFF, RTR, ERR flags */

		/*
		* Controller Area Network Identifier structure
		*
		* bit 0-28 : CAN identifier (11/29 bit)
		* bit 29 : error frame flag (0 = data frame, 1 = error frame)
		* bit 30 : remote transmission request flag (1 = rtr frame)
		* bit 31 : frame format flag (0 = standard 11 bit, 1 = extended 29 bit)
		*/
		typedef __u32 canid_t;

		/*
		* Controller Area Network Error Frame Mask structure
		*
		* bit 0-28 : error class mask (see include/linux/can/error.h)
		* bit 29-31 : set to zero
		*/
		typedef __u32 can_err_mask_t;

		/**
		* struct can_frame - basic CAN frame structure
		* @can_id: the CAN ID of the frame and CAN_*_FLAG flags, see above.
		* @can_dlc: the data length field of the CAN frame
		* @data: the CAN frame payload.
		*/
		struct can_frame {
		canid_t can_id; /* 32 bit CAN_ID + EFF/RTR/ERR flags */
		__u8 can_dlc; /* data length code: 0 .. 8 */
		__u8 data[8] __attribute__((aligned(8)));
		};

		/* particular protocols of the protocol family PF_CAN */
		#define CAN_RAW 1 /* RAW sockets */
		#define CAN_BCM 2 /* Broadcast Manager */
		#define CAN_TP16 3 /* VAG Transport Protocol v1.6 */
		#define CAN_TP20 4 /* VAG Transport Protocol v2.0 */
		#define CAN_MCNET 5 /* Bosch MCNet */
		#define CAN_ISOTP 6 /* ISO 15765-2 Transport Protocol */
		#define CAN_NPROTO 7

		#define SOL_CAN_BASE 100

		/**
		* struct sockaddr_can - the sockaddr structure for CAN sockets
		* @can_family: address family number AF_CAN.
		* @can_ifindex: CAN network interface index.
		* @can_addr: protocol specific address information
		*/
		struct sockaddr_can {
		sa_family_t can_family;
		int can_ifindex;
		union {
		/* transport protocol class address information (e.g. ISOTP) */
		struct { canid_t rx_id, tx_id; } tp;

		/* reserved for future CAN protocols address information */
		} can_addr;
		};

		/**
		* struct can_filter - CAN ID based filter in can_register().
		* @can_id: relevant bits of CAN ID which are not masked out.
		* @can_mask: CAN mask (see description)
		*
		* Description:
		* A filter matches, when
		*
		* <received_can_id> & mask == can_id & mask
		*
		* The filter can be inverted (CAN_INV_FILTER bit set in can_id) or it can
		* filter for error frames (CAN_ERR_FLAG bit set in mask).
		*/
		struct can_filter {
		canid_t can_id;
		canid_t can_mask;
		};

		#define CAN_INV_FILTER 0x20000000U /* to be set in can_filter.can_id */

		#endif /* CAN_H */

include/linux/can/core.h

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		/*
		* linux/can/core.h
		*
		* Protoypes and definitions for CAN protocol modules using the PF_CAN core
		*
		* Authors: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
		* Urs Thuermann <urs.thuermann@volkswagen.de>
		* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
		* All rights reserved.
		*
		* Send feedback to <socketcan-users@lists.berlios.de>
		*
		*/

		#ifndef CAN_CORE_H
		#define CAN_CORE_H

		#include <linux/can.h>
		#include <linux/skbuff.h>
		#include <linux/netdevice.h>

		#define CAN_VERSION "20071116"

		/* increment this number each time you change some user-space interface */
		#define CAN_ABI_VERSION "8"

		#define CAN_VERSION_STRING "rev " CAN_VERSION " abi " CAN_ABI_VERSION

		#define DNAME(dev) ((dev) ? (dev)->name : "any")

		/**
		* struct can_proto - CAN protocol structure
		* @type: type argument in socket() syscall, e.g. SOCK_DGRAM.
		* @protocol: protocol number in socket() syscall.
		* @capability: capability needed to open the socket, or -1 for no restriction.
		* @ops: pointer to struct proto_ops for sock->ops.
		* @prot: pointer to struct proto structure.
		*/
		struct can_proto {
		int type;
		int protocol;
		int capability;
		struct proto_ops *ops;
		struct proto *prot;
		};

		/* function prototypes for the CAN networklayer core (af_can.c) */

		extern int can_proto_register(struct can_proto *cp);
		extern void can_proto_unregister(struct can_proto *cp);

		extern int can_rx_register(struct net_device *dev, canid_t can_id,
		canid_t mask,
		void (func)(struct sk_buff , void *),
		void data, char ident);

		extern void can_rx_unregister(struct net_device *dev, canid_t can_id,
		canid_t mask,
		void (func)(struct sk_buff , void *),
		void *data);

		extern int can_send(struct sk_buff *skb, int loop);

		#endif /* CAN_CORE_H */

include/linux/can/error.h

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		/*
		* linux/can/error.h
		*
		* Definitions of the CAN error frame 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.
		*
		* Send feedback to <socketcan-users@lists.berlios.de>
		*
		*/

		#ifndef CAN_ERROR_H
		#define CAN_ERROR_H

		#define CAN_ERR_DLC 8 /* dlc for error 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) */

		/* 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 occured 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 */

net/Kconfig

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		@@ -218,6 +218,7 @@ endmenu
		endmenu

		source "net/ax25/Kconfig"
		source "net/can/Kconfig"
		source "net/irda/Kconfig"
		source "net/bluetooth/Kconfig"
		source "net/rxrpc/Kconfig"

net/Makefile

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		@@ -34,6 +34,7 @@ obj-$(CONFIG_LAPB) += lapb/
		obj-$(CONFIG_NETROM) += netrom/
		obj-$(CONFIG_ROSE) += rose/
		obj-$(CONFIG_AX25) += ax25/
		obj-$(CONFIG_CAN) += can/
		obj-$(CONFIG_IRDA) += irda/
		obj-$(CONFIG_BT) += bluetooth/
		obj-$(CONFIG_SUNRPC) += sunrpc/

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