can: CAN Network device driver and Netlink interface

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>

1 files changed, 70 insertions, 0 deletions

diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h
new file mode 100644
index 000000000000..4a37a56f6cdd
--- /dev/null
+++ b/include/linux/can/dev.h
@@ -0,0 +1,70 @@
+/*
+ * 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 */