174 lines
5.0 KiB
C
174 lines
5.0 KiB
C
/*
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* Amiga Linux/68k A2065 Ethernet Driver
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*
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* (C) Copyright 1995 by Geert Uytterhoeven <geert@linux-m68k.org>
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*
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* ---------------------------------------------------------------------------
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*
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* This program is based on
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*
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* ariadne.?: Amiga Linux/68k Ariadne Ethernet Driver
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* (C) Copyright 1995 by Geert Uytterhoeven,
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* Peter De Schrijver
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*
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* lance.c: An AMD LANCE ethernet driver for linux.
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* Written 1993-94 by Donald Becker.
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*
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* Am79C960: PCnet(tm)-ISA Single-Chip Ethernet Controller
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* Advanced Micro Devices
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* Publication #16907, Rev. B, Amendment/0, May 1994
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*
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* ---------------------------------------------------------------------------
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of the Linux
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* distribution for more details.
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*
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* ---------------------------------------------------------------------------
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*
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* The A2065 is a Zorro-II board made by Commodore/Ameristar. It contains:
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*
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* - an Am7990 Local Area Network Controller for Ethernet (LANCE) with
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* both 10BASE-2 (thin coax) and AUI (DB-15) connectors
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*/
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/*
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* Am7990 Local Area Network Controller for Ethernet (LANCE)
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*/
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struct lance_regs {
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unsigned short rdp; /* Register Data Port */
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unsigned short rap; /* Register Address Port */
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};
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/*
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* Am7990 Control and Status Registers
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*/
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#define LE_CSR0 0x0000 /* LANCE Controller Status */
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#define LE_CSR1 0x0001 /* IADR[15:0] */
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#define LE_CSR2 0x0002 /* IADR[23:16] */
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#define LE_CSR3 0x0003 /* Misc */
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/*
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* Bit definitions for CSR0 (LANCE Controller Status)
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*/
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#define LE_C0_ERR 0x8000 /* Error */
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#define LE_C0_BABL 0x4000 /* Babble: Transmitted too many bits */
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#define LE_C0_CERR 0x2000 /* No Heartbeat (10BASE-T) */
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#define LE_C0_MISS 0x1000 /* Missed Frame */
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#define LE_C0_MERR 0x0800 /* Memory Error */
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#define LE_C0_RINT 0x0400 /* Receive Interrupt */
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#define LE_C0_TINT 0x0200 /* Transmit Interrupt */
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#define LE_C0_IDON 0x0100 /* Initialization Done */
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#define LE_C0_INTR 0x0080 /* Interrupt Flag */
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#define LE_C0_INEA 0x0040 /* Interrupt Enable */
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#define LE_C0_RXON 0x0020 /* Receive On */
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#define LE_C0_TXON 0x0010 /* Transmit On */
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#define LE_C0_TDMD 0x0008 /* Transmit Demand */
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#define LE_C0_STOP 0x0004 /* Stop */
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#define LE_C0_STRT 0x0002 /* Start */
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#define LE_C0_INIT 0x0001 /* Initialize */
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/*
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* Bit definitions for CSR3
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*/
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#define LE_C3_BSWP 0x0004 /* Byte Swap
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(on for big endian byte order) */
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#define LE_C3_ACON 0x0002 /* ALE Control
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(on for active low ALE) */
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#define LE_C3_BCON 0x0001 /* Byte Control */
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/*
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* Mode Flags
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*/
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#define LE_MO_PROM 0x8000 /* Promiscuous Mode */
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#define LE_MO_INTL 0x0040 /* Internal Loopback */
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#define LE_MO_DRTY 0x0020 /* Disable Retry */
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#define LE_MO_FCOLL 0x0010 /* Force Collision */
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#define LE_MO_DXMTFCS 0x0008 /* Disable Transmit CRC */
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#define LE_MO_LOOP 0x0004 /* Loopback Enable */
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#define LE_MO_DTX 0x0002 /* Disable Transmitter */
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#define LE_MO_DRX 0x0001 /* Disable Receiver */
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struct lance_rx_desc {
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unsigned short rmd0; /* low address of packet */
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unsigned char rmd1_bits; /* descriptor bits */
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unsigned char rmd1_hadr; /* high address of packet */
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short length; /* This length is 2s complement (negative)!
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* Buffer length
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*/
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unsigned short mblength; /* Aactual number of bytes received */
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};
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struct lance_tx_desc {
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unsigned short tmd0; /* low address of packet */
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unsigned char tmd1_bits; /* descriptor bits */
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unsigned char tmd1_hadr; /* high address of packet */
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short length; /* Length is 2s complement (negative)! */
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unsigned short misc;
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};
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/*
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* Receive Flags
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*/
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#define LE_R1_OWN 0x80 /* LANCE owns the descriptor */
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#define LE_R1_ERR 0x40 /* Error */
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#define LE_R1_FRA 0x20 /* Framing Error */
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#define LE_R1_OFL 0x10 /* Overflow Error */
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#define LE_R1_CRC 0x08 /* CRC Error */
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#define LE_R1_BUF 0x04 /* Buffer Error */
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#define LE_R1_SOP 0x02 /* Start of Packet */
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#define LE_R1_EOP 0x01 /* End of Packet */
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#define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */
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/*
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* Transmit Flags
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*/
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#define LE_T1_OWN 0x80 /* LANCE owns the descriptor */
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#define LE_T1_ERR 0x40 /* Error */
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#define LE_T1_RES 0x20 /* Reserved,
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LANCE writes this with a zero */
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#define LE_T1_EMORE 0x10 /* More than one retry needed */
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#define LE_T1_EONE 0x08 /* One retry needed */
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#define LE_T1_EDEF 0x04 /* Deferred */
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#define LE_T1_SOP 0x02 /* Start of Packet */
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#define LE_T1_EOP 0x01 /* End of Packet */
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#define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */
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/*
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* Error Flags
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*/
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#define LE_T3_BUF 0x8000 /* Buffer Error */
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#define LE_T3_UFL 0x4000 /* Underflow Error */
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#define LE_T3_LCOL 0x1000 /* Late Collision */
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#define LE_T3_CLOS 0x0800 /* Loss of Carrier */
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#define LE_T3_RTY 0x0400 /* Retry Error */
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#define LE_T3_TDR 0x03ff /* Time Domain Reflectometry */
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/*
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* A2065 Expansion Board Structure
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*/
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#define A2065_LANCE 0x4000
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#define A2065_RAM 0x8000
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#define A2065_RAM_SIZE 0x8000
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