1 /* 2 * linux/can/netlink.h 3 * 4 * Definitions for the CAN netlink interface 5 * 6 * Copyright (c) 2009 Wolfgang Grandegger <wg (at) grandegger.com> 7 * 8 */ 9 10 #ifndef CAN_NETLINK_H 11 #define CAN_NETLINK_H 12 13 #include <linux/types.h> 14 15 /* 16 * CAN bit-timing parameters 17 * 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. 21 */ 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 */ 31 }; 32 33 /* 34 * CAN harware-dependent bit-timing constant 35 * 36 * Used for calculating and checking bit-timing parameters 37 */ 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 */ 41 __u32 tseg1_max; 42 __u32 tseg2_min; /* Time segement 2 = phase_seg2 */ 43 __u32 tseg2_max; 44 __u32 sjw_max; /* Synchronisation jump width */ 45 __u32 brp_min; /* Bit-rate prescaler */ 46 __u32 brp_max; 47 __u32 brp_inc; 48 }; 49 50 /* 51 * CAN clock parameters 52 */ 53 struct can_clock { 54 __u32 freq; /* CAN system clock frequency in Hz */ 55 }; 56 57 /* 58 * CAN operational and error states 59 */ 60 enum can_state { 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 */ 67 CAN_STATE_MAX 68 }; 69 70 /* 71 * CAN bus error counters 72 */ 73 struct can_berr_counter { 74 __u16 txerr; 75 __u16 rxerr; 76 }; 77 78 /* 79 * CAN controller mode 80 */ 81 struct can_ctrlmode { 82 __u32 mask; 83 __u32 flags; 84 }; 85 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 */ 91 92 /* 93 * CAN device statistics 94 */ 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 */ 102 }; 103 104 /* 105 * CAN netlink interface 106 */ 107 enum { 108 IFLA_CAN_UNSPEC, 109 IFLA_CAN_BITTIMING, 110 IFLA_CAN_BITTIMING_CONST, 111 IFLA_CAN_CLOCK, 112 IFLA_CAN_STATE, 113 IFLA_CAN_CTRLMODE, 114 IFLA_CAN_RESTART_MS, 115 IFLA_CAN_RESTART, 116 IFLA_CAN_BERR_COUNTER, 117 __IFLA_CAN_MAX 118 }; 119 120 #define IFLA_CAN_MAX (__IFLA_CAN_MAX - 1) 121 122 #endif /* CAN_NETLINK_H */ 123
