2 * socketcan/can/netlink.h
4 * Definitions for the CAN netlink interface
6 * $Id: dev.h 939 2009-02-14 14:30:19Z wolf $
8 * Copyright (c) 2009 Wolfgang Grandegger <wg@grandegger.com>
10 * Send feedback to <socketcan-users@lists.berlios.de>
17 #include <linux/types.h>
20 * CAN bit-timing parameters
22 * For further information, please read chapter "8 BIT TIMING
23 * REQUIREMENTS" of the "Bosch CAN Specification version 2.0"
24 * at http://www.semiconductors.bosch.de/pdf/can2spec.pdf.
26 struct can_bittiming {
27 __u32 bitrate; /* Bit-rate in bits/second */
28 __u32 sample_point; /* Sample point in one-tenth of a percent */
29 __u32 tq; /* Time quanta (TQ) in nanoseconds */
30 __u32 prop_seg; /* Propagation segment in TQs */
31 __u32 phase_seg1; /* Phase buffer segment 1 in TQs */
32 __u32 phase_seg2; /* Phase buffer segment 2 in TQs */
33 __u32 sjw; /* Synchronisation jump width in TQs */
34 __u32 brp; /* Bit-rate prescaler */
38 * CAN harware-dependent bit-timing constant
40 * Used for calculating and checking bit-timing parameters
42 struct can_bittiming_const {
43 char name[16]; /* Name of the CAN controller hardware */
44 __u32 tseg1_min; /* Time segement 1 = prop_seg + phase_seg1 */
46 __u32 tseg2_min; /* Time segement 2 = phase_seg2 */
48 __u32 sjw_max; /* Synchronisation jump width */
49 __u32 brp_min; /* Bit-rate prescaler */
55 * CAN clock parameters
58 __u32 freq; /* CAN system clock frequency in Hz */
62 * CAN operational and error states
65 CAN_STATE_ERROR_ACTIVE = 0, /* RX/TX error count < 96 */
66 CAN_STATE_ERROR_WARNING, /* RX/TX error count < 128 */
67 CAN_STATE_ERROR_PASSIVE, /* RX/TX error count < 256 */
68 CAN_STATE_BUS_OFF, /* RX/TX error count >= 256 */
69 CAN_STATE_STOPPED, /* Device is stopped */
70 CAN_STATE_SLEEPING, /* Device is sleeping */
75 * CAN bus error counters
77 struct can_berr_counter {
90 #define CAN_CTRLMODE_LOOPBACK 0x01 /* Loopback mode */
91 #define CAN_CTRLMODE_LISTENONLY 0x02 /* Listen-only mode */
92 #define CAN_CTRLMODE_3_SAMPLES 0x04 /* Triple sampling mode */
93 #define CAN_CTRLMODE_ONE_SHOT 0x08 /* One-Shot mode */
94 #define CAN_CTRLMODE_BERR_REPORTING 0x10 /* Bus-error reporting */
97 * CAN device statistics
99 struct can_device_stats {
100 __u32 bus_error; /* Bus errors */
101 __u32 error_warning; /* Changes to error warning state */
102 __u32 error_passive; /* Changes to error passive state */
103 __u32 bus_off; /* Changes to bus off state */
104 __u32 arbitration_lost; /* Arbitration lost errors */
105 __u32 restarts; /* CAN controller re-starts */
109 * CAN netlink interface
114 IFLA_CAN_BITTIMING_CONST,
120 IFLA_CAN_BERR_COUNTER,
124 #define IFLA_CAN_MAX (__IFLA_CAN_MAX - 1)
126 #endif /* CAN_NETLINK_H */