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/**
* @file
* @ingroup can
* @brief Gaisler wrapper to OpenCores CAN - driver interface
*/
/*
* COPYRIGHT (c) 2007.
* Cobham Gaisler AB.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef __OCCAN_DRIVER_H__
#define __OCCAN_DRIVER_H__
#ifdef __cplusplus
extern "C" {
#endif
/* CAN MESSAGE */
typedef struct {
char extended; /* 1= Extended Frame (29-bit id), 0= STD Frame (11-bit id) */
char rtr; /* RTR - Remote Transmission Request */
char sshot; /* single shot */
unsigned char len;
unsigned char data[8];
unsigned int id;
} CANMsg;
typedef struct {
/* tx/rx stats */
unsigned int rx_msgs;
unsigned int tx_msgs;
/* Error Interrupt counters */
unsigned int err_warn;
unsigned int err_dovr;
unsigned int err_errp;
unsigned int err_arb;
unsigned int err_bus;
/**** BUS ERRORS (err_arb) ****/
/* ALC 4-0 */
unsigned int err_arb_bitnum[32]; /* At what bit arbitration is lost */
/******************************/
/**** BUS ERRORS (err_bus) ****/
/* ECC 7-6 */
unsigned int err_bus_bit; /* Bit error */
unsigned int err_bus_form; /* Form Error */
unsigned int err_bus_stuff; /* Stuff Error */
unsigned int err_bus_other; /* Other Error */
/* ECC 5 */
unsigned int err_bus_rx; /* Errors during Reception */
unsigned int err_bus_tx; /* Errors during Transmission */
/* ECC 4:0 */
unsigned int err_bus_segs[32]; /* Segment (Where in frame error occured)
* See OCCAN_SEG_* defines for indexes
*/
/******************************/
/* total number of interrupts */
unsigned int ints;
/* software monitoring hw errors */
unsigned int tx_buf_error;
/* Software fifo overrun */
unsigned int rx_sw_dovr;
} occan_stats;
/* indexes into occan_stats.err_bus_segs[index] */
#define OCCAN_SEG_ID28 0x02 /* ID field bit 28:21 */
#define OCCAN_SEG_ID20 0x06 /* ID field bit 20:18 */
#define OCCAN_SEG_ID17 0x07 /* ID field bit 17:13 */
#define OCCAN_SEG_ID12 0x0f /* ID field bit 12:5 */
#define OCCAN_SEG_ID4 0x0e /* ID field bit 4:0 */
#define OCCAN_SEG_START 0x03 /* Start of Frame */
#define OCCAN_SEG_SRTR 0x04 /* Bit SRTR */
#define OCCAN_SEG_IDE 0x05 /* Bit IDE */
#define OCCAN_SEG_RTR 0x0c /* Bit RTR */
#define OCCAN_SEG_RSV0 0x09 /* Reserved bit 0 */
#define OCCAN_SEG_RSV1 0x0d /* Reserved bit 1 */
#define OCCAN_SEG_DLEN 0x0b /* Data Length code */
#define OCCAN_SEG_DFIELD 0x0a /* Data Field */
#define OCCAN_SEG_CRC_SEQ 0x08 /* CRC Sequence */
#define OCCAN_SEG_CRC_DELIM 0x18 /* CRC Delimiter */
#define OCCAN_SEG_ACK_SLOT 0x19 /* Acknowledge slot */
#define OCCAN_SEG_ACK_DELIM 0x1b /* Acknowledge delimiter */
#define OCCAN_SEG_EOF 0x1a /* End Of Frame */
#define OCCAN_SEG_INTERMISSION 0x12 /* Intermission */
#define OCCAN_SEG_ACT_ERR 0x11 /* Active error flag */
#define OCCAN_SEG_PASS_ERR 0x16 /* Passive error flag */
#define OCCAN_SEG_DOMINANT 0x13 /* Tolerate dominant bits */
#define OCCAN_SEG_EDELIM 0x17 /* Error delimiter */
#define OCCAN_SEG_OVERLOAD 0x1c /* overload flag */
#define CANMSG_OPT_RTR 0x40 /* RTR Frame */
#define CANMSG_OPT_EXTENDED 0x80 /* Exteneded frame */
#define CANMSG_OPT_SSHOT 0x01 /* Single Shot, no retry */
#define OCCAN_IOC_START 1
#define OCCAN_IOC_STOP 2
#define OCCAN_IOC_GET_CONF 3
#define OCCAN_IOC_GET_STATS 4
#define OCCAN_IOC_GET_STATUS 5
#define OCCAN_IOC_SET_SPEED 6
#define OCCAN_IOC_SPEED_AUTO 7
#define OCCAN_IOC_SET_LINK 8
#define OCCAN_IOC_SET_FILTER 9
#define OCCAN_IOC_SET_BLK_MODE 10
#define OCCAN_IOC_SET_BUFLEN 11
#define OCCAN_IOC_SET_BTRS 12
struct occan_afilter {
unsigned char code[4];
unsigned char mask[4];
int single_mode;
};
#define OCCAN_STATUS_RESET 0x01
#define OCCAN_STATUS_OVERRUN 0x02
#define OCCAN_STATUS_WARN 0x04
#define OCCAN_STATUS_ERR_PASSIVE 0x08
#define OCCAN_STATUS_ERR_BUSOFF 0x10
#define OCCAN_STATUS_QUEUE_ERROR 0x80
#define OCCAN_BLK_MODE_RX 0x1
#define OCCAN_BLK_MODE_TX 0x2
void occan_register_drv (void);
#define OCCAN_SPEED_500K 500000
#define OCCAN_SPEED_250K 250000
#define OCCAN_SPEED_125K 125000
#define OCCAN_SPEED_75K 75000
#define OCCAN_SPEED_50K 50000
#define OCCAN_SPEED_25K 25000
#define OCCAN_SPEED_10K 10000
#ifdef __cplusplus
}
#endif
#endif
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