4 * Definitions for the CAN network device driver interface
6 * Copyright (C) 2006 Andrey Volkov <avolkov@varma-el.com>
9 * Copyright (C) 2008 Wolfgang Grandegger <wg@grandegger.com>
11 * Send feedback to <socketcan-users@lists.berlios.de>
17 #include <linux/can/netlink.h>
18 #include <linux/can/error.h>
30 * CAN common private data
33 struct can_device_stats can_stats;
35 struct can_bittiming bittiming;
36 struct can_bittiming_const *bittiming_const;
37 struct can_clock clock;
43 struct timer_list restart_timer;
45 int (*do_set_bittiming)(struct net_device *dev);
46 int (*do_set_mode)(struct net_device *dev, enum can_mode mode);
47 int (*do_get_state)(const struct net_device *dev,
48 enum can_state *state);
50 unsigned int echo_skb_max;
51 struct sk_buff **echo_skb;
55 * get_can_dlc(value) - helper macro to cast a given data length code (dlc)
56 * to __u8 and ensure the dlc value to be max. 8 bytes.
58 * To be used in the CAN netdriver receive path to ensure conformance with
59 * ISO 11898-1 Chapter 8.4.2.3 (DLC field)
61 #define get_can_dlc(i) (min_t(__u8, (i), 8))
63 struct net_device *alloc_candev(int sizeof_priv, unsigned int echo_skb_max);
64 void free_candev(struct net_device *dev);
66 int open_candev(struct net_device *dev);
67 void close_candev(struct net_device *dev);
69 int register_candev(struct net_device *dev);
70 void unregister_candev(struct net_device *dev);
72 int can_restart_now(struct net_device *dev);
73 void can_bus_off(struct net_device *dev);
75 void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
77 void can_get_echo_skb(struct net_device *dev, unsigned int idx);
78 void can_free_echo_skb(struct net_device *dev, unsigned int idx);
80 struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf);
81 struct sk_buff *alloc_can_err_skb(struct net_device *dev,
82 struct can_frame **cf);
84 #endif /* CAN_DEV_H */