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/* $OpenBSD: if_elreg.h,v 1.3 2022/01/09 05:42:44 jsg Exp $ */
/* $NetBSD: if_elreg.h,v 1.4 1994/10/27 04:17:29 cgd Exp $ */
/*
* Copyright (c) 1994, Matthew E. Kimmel. Permission is hereby granted
* to use, copy, modify and distribute this software provided that both
* the copyright notice and this permission notice appear in all copies
* of the software, derivative works or modified versions, and any
* portions thereof.
*/
/*
* 3COM Etherlink 3C501 Register Definitions
*/
/*
* I/O Ports
*/
#define EL_RXS 0x6 /* Receive status register */
#define EL_RXC 0x6 /* Receive command register */
#define EL_TXS 0x7 /* Transmit status register */
#define EL_TXC 0x7 /* Transmit command register */
#define EL_GPBL 0x8 /* GP buffer ptr low byte */
#define EL_GPBH 0x9 /* GP buffer ptr high byte */
#define EL_RBL 0xa /* Receive buffer ptr low byte */
#define EL_RBC 0xa /* Receive buffer clear */
#define EL_RBH 0xb /* Receive buffer ptr high byte */
#define EL_EAW 0xc /* Ethernet address window */
#define EL_AS 0xe /* Auxiliary status register */
#define EL_AC 0xe /* Auxiliary command register */
#define EL_BUF 0xf /* Data buffer */
/* Receive status register bits */
#define EL_RXS_OFLOW 0x01 /* Overflow error */
#define EL_RXS_FCS 0x02 /* FCS error */
#define EL_RXS_DRIB 0x04 /* Dribble error */
#define EL_RXS_SHORT 0x08 /* Short frame */
#define EL_RXS_NOFLOW 0x10 /* No overflow */
#define EL_RXS_GOOD 0x20 /* Received good frame */
#define EL_RXS_STALE 0x80 /* Stale receive status */
/* Receive command register bits */
#define EL_RXC_DISABLE 0x00 /* Receiver disabled */
#define EL_RXC_DOFLOW 0x01 /* Detect overflow */
#define EL_RXC_DFCS 0x02 /* Detect FCS errs */
#define EL_RXC_DDRIB 0x04 /* Detect dribble errors */
#define EL_RXC_DSHORT 0x08 /* Detect short frames */
#define EL_RXC_DNOFLOW 0x10 /* Detect frames w/o overflow ??? */
#define EL_RXC_AGF 0x20 /* Accept Good Frames */
#define EL_RXC_PROMISC 0x40 /* Promiscuous mode */
#define EL_RXC_ABROAD 0x80 /* Accept address, broadcast */
#define EL_RXC_AMULTI 0xc0 /* Accept address, multicast */
/* Transmit status register bits */
#define EL_TXS_UFLOW 0x01 /* Underflow */
#define EL_TXS_COLL 0x02 /* Collision */
#define EL_TXS_COLL16 0x04 /* Collision 16 */
#define EL_TXS_READY 0x08 /* Ready for new frame */
/* Transmit command register bits */
#define EL_TXC_DUFLOW 0x01 /* Detect underflow */
#define EL_TXC_DCOLL 0x02 /* Detect collisions */
#define EL_TXC_DCOLL16 0x04 /* Detect collision 16 */
#define EL_TXC_DSUCCESS 0x08 /* Detect success */
/* Auxiliary status register bits */
#define EL_AS_RXBUSY 0x01 /* Receive busy */
#define EL_AS_DMADONE 0x10 /* DMA finished */
#define EL_AS_TXBUSY 0x80 /* Transmit busy */
/* Auxiliary command register bits */
#define EL_AC_HOST 0x00 /* System bus can access buffer */
#define EL_AC_IRQE 0x01 /* IRQ enable */
#define EL_AC_TXBAD 0x02 /* Transmit frames with bad FCS */
#define EL_AC_TXFRX 0x04 /* Transmit followed by receive */
#define EL_AC_RX 0x08 /* Receive */
#define EL_AC_LB 0x0c /* Loopback */
#define EL_AC_DRQ 0x20 /* DMA request */
#define EL_AC_RIDE 0x40 /* DRQ and IRQ enabled */
#define EL_AC_RESET 0x80 /* Reset */
/* Packet buffer size */
#define EL_BUFSIZ 2048
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