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can: CAN Network device driver and Netlink interface

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The CAN network device driver interface provides a generic interface to
setup, configure and monitor CAN network devices. It exports a set of
common data structures and functions, which all real CAN network device
drivers should use. Please have a look to the SJA1000 or MSCAN driver
to understand how to use them. The name of the module is can-dev.ko.

Furthermore, it adds a Netlink interface allowing to configure the CAN
device using the program "ip" from the iproute2 utility suite.

For further information please check "Documentation/networking/can.txt"

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wolfgang Grandegger
2009-05-15 23:39:29 +00:00
committed by David S. Miller
parent 4261a2043f
commit 39549eef35
6 changed files with 869 additions and 0 deletions
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70
include/linux/can/dev.h Normal file
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/*
* linux/can/dev.h
*
* Definitions for the CAN network device driver interface
*
* Copyright (C) 2006 Andrey Volkov <avolkov@varma-el.com>
* Varma Electronics Oy
*
* Copyright (C) 2008 Wolfgang Grandegger <wg@grandegger.com>
*
* Send feedback to <socketcan-users@lists.berlios.de>
*/
#ifndef CAN_DEV_H
#define CAN_DEV_H
#include <linux/can/netlink.h>
#include <linux/can/error.h>
/*
* CAN mode
*/
enum can_mode {
CAN_MODE_STOP = 0,
CAN_MODE_START,
CAN_MODE_SLEEP
};
/*
* CAN common private data
*/
#define CAN_ECHO_SKB_MAX 4
struct can_priv {
struct can_device_stats can_stats;
struct can_bittiming bittiming;
struct can_bittiming_const *bittiming_const;
struct can_clock clock;
enum can_state state;
u32 ctrlmode;
int restart_ms;
struct timer_list restart_timer;
struct sk_buff *echo_skb[CAN_ECHO_SKB_MAX];
int (*do_set_bittiming)(struct net_device *dev);
int (*do_set_mode)(struct net_device *dev, enum can_mode mode);
int (*do_get_state)(const struct net_device *dev,
enum can_state *state);
};
struct net_device *alloc_candev(int sizeof_priv);
void free_candev(struct net_device *dev);
int open_candev(struct net_device *dev);
void close_candev(struct net_device *dev);
int register_candev(struct net_device *dev);
void unregister_candev(struct net_device *dev);
int can_restart_now(struct net_device *dev);
void can_bus_off(struct net_device *dev);
void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev, int idx);
void can_get_echo_skb(struct net_device *dev, int idx);
#endif /* CAN_DEV_H */