1 /* 2 * Amiga Linux/68k A2065 Ethernet Driver 3 * 4 * (C) Copyright 1995 by Geert Uytterhoeven <geert@linux-m68k.org> 5 * 6 * --------------------------------------------------------------------------- 7 * 8 * This program is based on 9 * 10 * ariadne.?: Amiga Linux/68k Ariadne Ethernet Driver 11 * (C) Copyright 1995 by Geert Uytterhoeven, 12 * Peter De Schrijver 13 * 14 * lance.c: An AMD LANCE ethernet driver for linux. 15 * Written 1993-94 by Donald Becker. 16 * 17 * Am79C960: PCnet(tm)-ISA Single-Chip Ethernet Controller 18 * Advanced Micro Devices 19 * Publication #16907, Rev. B, Amendment/0, May 1994 20 * 21 * --------------------------------------------------------------------------- 22 * 23 * This file is subject to the terms and conditions of the GNU General Public 24 * License. See the file COPYING in the main directory of the Linux 25 * distribution for more details. 26 * 27 * --------------------------------------------------------------------------- 28 * 29 * The A2065 is a Zorro-II board made by Commodore/Ameristar. It contains: 30 * 31 * - an Am7990 Local Area Network Controller for Ethernet (LANCE) with 32 * both 10BASE-2 (thin coax) and AUI (DB-15) connectors 33 */ 34 35 36 /* 37 * Am7990 Local Area Network Controller for Ethernet (LANCE) 38 */ 39 40 struct lance_regs { 41 unsigned short rdp; /* Register Data Port */ 42 unsigned short rap; /* Register Address Port */ 43 }; 44 45 46 /* 47 * Am7990 Control and Status Registers 48 */ 49 50 #define LE_CSR0 0x0000 /* LANCE Controller Status */ 51 #define LE_CSR1 0x0001 /* IADR[15:0] */ 52 #define LE_CSR2 0x0002 /* IADR[23:16] */ 53 #define LE_CSR3 0x0003 /* Misc */ 54 55 56 /* 57 * Bit definitions for CSR0 (LANCE Controller Status) 58 */ 59 60 #define LE_C0_ERR 0x8000 /* Error */ 61 #define LE_C0_BABL 0x4000 /* Babble: Transmitted too many bits */ 62 #define LE_C0_CERR 0x2000 /* No Heartbeat (10BASE-T) */ 63 #define LE_C0_MISS 0x1000 /* Missed Frame */ 64 #define LE_C0_MERR 0x0800 /* Memory Error */ 65 #define LE_C0_RINT 0x0400 /* Receive Interrupt */ 66 #define LE_C0_TINT 0x0200 /* Transmit Interrupt */ 67 #define LE_C0_IDON 0x0100 /* Initialization Done */ 68 #define LE_C0_INTR 0x0080 /* Interrupt Flag */ 69 #define LE_C0_INEA 0x0040 /* Interrupt Enable */ 70 #define LE_C0_RXON 0x0020 /* Receive On */ 71 #define LE_C0_TXON 0x0010 /* Transmit On */ 72 #define LE_C0_TDMD 0x0008 /* Transmit Demand */ 73 #define LE_C0_STOP 0x0004 /* Stop */ 74 #define LE_C0_STRT 0x0002 /* Start */ 75 #define LE_C0_INIT 0x0001 /* Initialize */ 76 77 78 /* 79 * Bit definitions for CSR3 80 */ 81 82 #define LE_C3_BSWP 0x0004 /* Byte Swap 83 (on for big endian byte order) */ 84 #define LE_C3_ACON 0x0002 /* ALE Control 85 (on for active low ALE) */ 86 #define LE_C3_BCON 0x0001 /* Byte Control */ 87 88 89 /* 90 * Mode Flags 91 */ 92 93 #define LE_MO_PROM 0x8000 /* Promiscuous Mode */ 94 #define LE_MO_INTL 0x0040 /* Internal Loopback */ 95 #define LE_MO_DRTY 0x0020 /* Disable Retry */ 96 #define LE_MO_FCOLL 0x0010 /* Force Collision */ 97 #define LE_MO_DXMTFCS 0x0008 /* Disable Transmit CRC */ 98 #define LE_MO_LOOP 0x0004 /* Loopback Enable */ 99 #define LE_MO_DTX 0x0002 /* Disable Transmitter */ 100 #define LE_MO_DRX 0x0001 /* Disable Receiver */ 101 102 103 struct lance_rx_desc { 104 unsigned short rmd0; /* low address of packet */ 105 unsigned char rmd1_bits; /* descriptor bits */ 106 unsigned char rmd1_hadr; /* high address of packet */ 107 short length; /* This length is 2s complement (negative)! 108 * Buffer length 109 */ 110 unsigned short mblength; /* Aactual number of bytes received */ 111 }; 112 113 struct lance_tx_desc { 114 unsigned short tmd0; /* low address of packet */ 115 unsigned char tmd1_bits; /* descriptor bits */ 116 unsigned char tmd1_hadr; /* high address of packet */ 117 short length; /* Length is 2s complement (negative)! */ 118 unsigned short misc; 119 }; 120 121 122 /* 123 * Receive Flags 124 */ 125 126 #define LE_R1_OWN 0x80 /* LANCE owns the descriptor */ 127 #define LE_R1_ERR 0x40 /* Error */ 128 #define LE_R1_FRA 0x20 /* Framing Error */ 129 #define LE_R1_OFL 0x10 /* Overflow Error */ 130 #define LE_R1_CRC 0x08 /* CRC Error */ 131 #define LE_R1_BUF 0x04 /* Buffer Error */ 132 #define LE_R1_SOP 0x02 /* Start of Packet */ 133 #define LE_R1_EOP 0x01 /* End of Packet */ 134 #define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */ 135 136 137 /* 138 * Transmit Flags 139 */ 140 141 #define LE_T1_OWN 0x80 /* LANCE owns the descriptor */ 142 #define LE_T1_ERR 0x40 /* Error */ 143 #define LE_T1_RES 0x20 /* Reserved, 144 LANCE writes this with a zero */ 145 #define LE_T1_EMORE 0x10 /* More than one retry needed */ 146 #define LE_T1_EONE 0x08 /* One retry needed */ 147 #define LE_T1_EDEF 0x04 /* Deferred */ 148 #define LE_T1_SOP 0x02 /* Start of Packet */ 149 #define LE_T1_EOP 0x01 /* End of Packet */ 150 #define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */ 151 152 153 /* 154 * Error Flags 155 */ 156 157 #define LE_T3_BUF 0x8000 /* Buffer Error */ 158 #define LE_T3_UFL 0x4000 /* Underflow Error */ 159 #define LE_T3_LCOL 0x1000 /* Late Collision */ 160 #define LE_T3_CLOS 0x0800 /* Loss of Carrier */ 161 #define LE_T3_RTY 0x0400 /* Retry Error */ 162 #define LE_T3_TDR 0x03ff /* Time Domain Reflectometry */ 163 164 165 /* 166 * A2065 Expansion Board Structure 167 */ 168 169 #define A2065_LANCE 0x4000 170 171 #define A2065_RAM 0x8000 172 #define A2065_RAM_SIZE 0x8000 173 174