1 /* $NetBSD: if_elreg.h,v 1.4 1994/10/27 04:17:29 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1994, Matthew E. Kimmel. Permission is hereby granted 5 * to use, copy, modify and distribute this software provided that both 6 * the copyright notice and this permission notice appear in all copies 7 * of the software, derivative works or modified versions, and any 8 * portions thereof. 9 */ 10 11 /* 12 * 3COM Etherlink 3C501 Register Definitions 13 */ 14 15 /* 16 * I/O Ports 17 */ 18 #define EL_RXS 0x6 /* Receive status register */ 19 #define EL_RXC 0x6 /* Receive command register */ 20 #define EL_TXS 0x7 /* Transmit status register */ 21 #define EL_TXC 0x7 /* Transmit command register */ 22 #define EL_GPBL 0x8 /* GP buffer ptr low byte */ 23 #define EL_GPBH 0x9 /* GP buffer ptr high byte */ 24 #define EL_RBL 0xa /* Receive buffer ptr low byte */ 25 #define EL_RBC 0xa /* Receive buffer clear */ 26 #define EL_RBH 0xb /* Receive buffer ptr high byte */ 27 #define EL_EAW 0xc /* Ethernet address window */ 28 #define EL_AS 0xe /* Auxillary status register */ 29 #define EL_AC 0xe /* Auxillary command register */ 30 #define EL_BUF 0xf /* Data buffer */ 31 32 /* Receive status register bits */ 33 #define EL_RXS_OFLOW 0x01 /* Overflow error */ 34 #define EL_RXS_FCS 0x02 /* FCS error */ 35 #define EL_RXS_DRIB 0x04 /* Dribble error */ 36 #define EL_RXS_SHORT 0x08 /* Short frame */ 37 #define EL_RXS_NOFLOW 0x10 /* No overflow */ 38 #define EL_RXS_GOOD 0x20 /* Received good frame */ 39 #define EL_RXS_STALE 0x80 /* Stale receive status */ 40 41 /* Receive command register bits */ 42 #define EL_RXC_DISABLE 0x00 /* Receiver disabled */ 43 #define EL_RXC_DOFLOW 0x01 /* Detect overflow */ 44 #define EL_RXC_DFCS 0x02 /* Detect FCS errs */ 45 #define EL_RXC_DDRIB 0x04 /* Detect dribble errors */ 46 #define EL_RXC_DSHORT 0x08 /* Detect short frames */ 47 #define EL_RXC_DNOFLOW 0x10 /* Detect frames w/o overflow ??? */ 48 #define EL_RXC_AGF 0x20 /* Accept Good Frames */ 49 #define EL_RXC_PROMISC 0x40 /* Promiscuous mode */ 50 #define EL_RXC_ABROAD 0x80 /* Accept address, broadcast */ 51 #define EL_RXC_AMULTI 0xc0 /* Accept address, multicast */ 52 53 /* Transmit status register bits */ 54 #define EL_TXS_UFLOW 0x01 /* Underflow */ 55 #define EL_TXS_COLL 0x02 /* Collision */ 56 #define EL_TXS_COLL16 0x04 /* Collision 16 */ 57 #define EL_TXS_READY 0x08 /* Ready for new frame */ 58 59 /* Transmit command register bits */ 60 #define EL_TXC_DUFLOW 0x01 /* Detect underflow */ 61 #define EL_TXC_DCOLL 0x02 /* Detect collisions */ 62 #define EL_TXC_DCOLL16 0x04 /* Detect collision 16 */ 63 #define EL_TXC_DSUCCESS 0x08 /* Detect success */ 64 65 /* Auxillary status register bits */ 66 #define EL_AS_RXBUSY 0x01 /* Receive busy */ 67 #define EL_AS_DMADONE 0x10 /* DMA finished */ 68 #define EL_AS_TXBUSY 0x80 /* Transmit busy */ 69 70 /* Auxillary command register bits */ 71 #define EL_AC_HOST 0x00 /* System bus can access buffer */ 72 #define EL_AC_IRQE 0x01 /* IRQ enable */ 73 #define EL_AC_TXBAD 0x02 /* Transmit frames with bad FCS */ 74 #define EL_AC_TXFRX 0x04 /* Transmit followed by receive */ 75 #define EL_AC_RX 0x08 /* Receive */ 76 #define EL_AC_LB 0x0c /* Loopback */ 77 #define EL_AC_DRQ 0x20 /* DMA request */ 78 #define EL_AC_RIDE 0x40 /* DRQ and IRQ enabled */ 79 #define EL_AC_RESET 0x80 /* Reset */ 80 81 /* Packet buffer size */ 82 #define EL_BUFSIZ 2048 83