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4 * Definitions for the CAN netlink interface
6 * Copyright (c) 2009 Wolfgang Grandegger <wg@grandegger.com>
13 #include <linux/types.h>
16 * CAN bit-timing parameters
18 * For further information, please read chapter "8 BIT TIMING
19 * REQUIREMENTS" of the "Bosch CAN Specification version 2.0"
20 * at http://www.semiconductors.bosch.de/pdf/can2spec.pdf.
22 struct can_bittiming
{
23 __u32 bitrate
; /* Bit-rate in bits/second */
24 __u32 sample_point
; /* Sample point in one-tenth of a percent */
25 __u32 tq
; /* Time quanta (TQ) in nanoseconds */
26 __u32 prop_seg
; /* Propagation segment in TQs */
27 __u32 phase_seg1
; /* Phase buffer segment 1 in TQs */
28 __u32 phase_seg2
; /* Phase buffer segment 2 in TQs */
29 __u32 sjw
; /* Synchronisation jump width in TQs */
30 __u32 brp
; /* Bit-rate prescaler */
34 * CAN harware-dependent bit-timing constant
36 * Used for calculating and checking bit-timing parameters
38 struct can_bittiming_const
{
39 char name
[16]; /* Name of the CAN controller hardware */
40 __u32 tseg1_min
; /* Time segement 1 = prop_seg + phase_seg1 */
42 __u32 tseg2_min
; /* Time segement 2 = phase_seg2 */
44 __u32 sjw_max
; /* Synchronisation jump width */
45 __u32 brp_min
; /* Bit-rate prescaler */
51 * CAN clock parameters
54 __u32 freq
; /* CAN system clock frequency in Hz */
58 * CAN operational and error states
61 CAN_STATE_ERROR_ACTIVE
= 0, /* RX/TX error count < 96 */
62 CAN_STATE_ERROR_WARNING
, /* RX/TX error count < 128 */
63 CAN_STATE_ERROR_PASSIVE
, /* RX/TX error count < 256 */
64 CAN_STATE_BUS_OFF
, /* RX/TX error count >= 256 */
65 CAN_STATE_STOPPED
, /* Device is stopped */
66 CAN_STATE_SLEEPING
, /* Device is sleeping */
71 * CAN bus error counters
73 struct can_berr_counter
{
86 #define CAN_CTRLMODE_LOOPBACK 0x01 /* Loopback mode */
87 #define CAN_CTRLMODE_LISTENONLY 0x02 /* Listen-only mode */
88 #define CAN_CTRLMODE_3_SAMPLES 0x04 /* Triple sampling mode */
89 #define CAN_CTRLMODE_ONE_SHOT 0x08 /* One-Shot mode */
90 #define CAN_CTRLMODE_BERR_REPORTING 0x10 /* Bus-error reporting */
93 * CAN device statistics
95 struct can_device_stats
{
96 __u32 bus_error
; /* Bus errors */
97 __u32 error_warning
; /* Changes to error warning state */
98 __u32 error_passive
; /* Changes to error passive state */
99 __u32 bus_off
; /* Changes to bus off state */
100 __u32 arbitration_lost
; /* Arbitration lost errors */
101 __u32 restarts
; /* CAN controller re-starts */
105 * CAN netlink interface
110 IFLA_CAN_BITTIMING_CONST
,
116 IFLA_CAN_BERR_COUNTER
,
120 #define IFLA_CAN_MAX (__IFLA_CAN_MAX - 1)
122 #endif /* CAN_NETLINK_H */