usr/src/sys/vax/if/if_ecreg.h

/*      if_ecreg.h      4.1     82/04/11        */

/*
 * 3Com Ethernet controller registers.
 */
struct ecdevice {
        short   ec_rcr;         /* Receive Control Register */
        short   ec_xcr;         /* Transmit Control Register */
};

/*
 * Control and status bits -- rcr
 */
#define EC_SPIE         0x8000          /* set parity interrupt enable */
#define EC_ASTEP        0x4000          /* increment address counter */
#define EC_AROM         0x2000          /* 1: Use address ROM, 0: use RAM */
#define EC_PE           0x2000          /* Parity error */
#define EC_AWCLK        0x1000          /* address write clock bit */
#define EC_PIE          0x1000          /* Parity interrupt enable (read) */
#define EC_ADATA        0x0f00          /* address/filtering */
#define EC_RDONE        0x0080          /* receive done */
#define EC_RINTEN       0x0040          /* receive interrupt enable */
#define EC_RCLR         0x0020          /* clear RDONE bit */
#define EC_RWBN         0x0010          /* submit buffer for receive */
#define EC_RBN          0x000f          /* buffer number */

#define EC_RBITS        "\10\16PE\15PIE\10RDONE\7RINTEN"

/*
 * Control and status bits -- xcr
 */
#define EC_JAM          0x8000          /* collision dectected */
#define EC_JINTEN       0x4000          /* collision interrupt enable */
#define EC_JCLR         0x2000          /* clear collision detect */
#define EC_UECLR        0x0100          /* reset controller */
#define EC_XDONE        0x0080          /* transmit done */
#define EC_XINTEN       0x0040          /* transmit interrupt enable */
#define EC_XCLR         0x0020          /* clear XDONE bit */
#define EC_XWBN         0x0010          /* submit buffer for transmit */
#define EC_XBN          0x000f          /* buffer number */

#define EC_XBITS        "\10\20JAM\17JINTEN\10XDONE\7XINTEN"

/*
 * Useful combinations
 */
#define EC_READ         (EC_AROM|0x600|EC_RINTEN|EC_RWBN)
#define EC_WRITE        (EC_JINTEN|EC_XINTEN|EC_XWBN)

/*
 * Buffer number definitions
 */
#define ECTBF           0               /* Buffer for transmit */
#define ECRLBF          1               /* First buffer for receive */
#define ECRHBF          15              /* Last buffer for receive */

#define ECRDOFF         528             /* Packet offset in read buffer */