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356 lines
11 KiB
C
356 lines
11 KiB
C
#ifndef _3c523_INCLUDE_
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#define _3c523_INCLUDE_
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/*
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This is basically a hacked version of ni52.h, for the 3c523
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Etherlink/MC.
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*/
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/*
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* Intel i82586 Ethernet definitions
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*
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* This is an extension to the Linux operating system, and is covered by the
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* same GNU General Public License that covers that work.
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*
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* Copyright 1995 by Chris Beauregard (cpbeaure@undergrad.math.uwaterloo.ca)
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*
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* See 3c523.c for details.
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*
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* $Header: /home/chrisb/linux-1.2.13-3c523/drivers/net/RCS/3c523.h,v 1.6 1996/01/20 05:09:00 chrisb Exp chrisb $
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*/
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/*
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* where to find the System Configuration Pointer (SCP)
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*/
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#define SCP_DEFAULT_ADDRESS 0xfffff4
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/*
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* System Configuration Pointer Struct
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*/
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struct scp_struct
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{
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unsigned short zero_dum0; /* has to be zero */
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unsigned char sysbus; /* 0=16Bit,1=8Bit */
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unsigned char zero_dum1; /* has to be zero for 586 */
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unsigned short zero_dum2;
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unsigned short zero_dum3;
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char *iscp; /* pointer to the iscp-block */
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};
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/*
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* Intermediate System Configuration Pointer (ISCP)
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*/
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struct iscp_struct
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{
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unsigned char busy; /* 586 clears after successful init */
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unsigned char zero_dummy; /* hast to be zero */
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unsigned short scb_offset; /* pointeroffset to the scb_base */
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char *scb_base; /* base-address of all 16-bit offsets */
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};
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/*
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* System Control Block (SCB)
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*/
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struct scb_struct
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{
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unsigned short status; /* status word */
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unsigned short cmd; /* command word */
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unsigned short cbl_offset; /* pointeroffset, command block list */
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unsigned short rfa_offset; /* pointeroffset, receive frame area */
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unsigned short crc_errs; /* CRC-Error counter */
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unsigned short aln_errs; /* alignmenterror counter */
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unsigned short rsc_errs; /* Resourceerror counter */
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unsigned short ovrn_errs; /* OVerrunerror counter */
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};
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/*
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* possible command values for the command word
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*/
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#define RUC_MASK 0x0070 /* mask for RU commands */
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#define RUC_NOP 0x0000 /* NOP-command */
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#define RUC_START 0x0010 /* start RU */
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#define RUC_RESUME 0x0020 /* resume RU after suspend */
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#define RUC_SUSPEND 0x0030 /* suspend RU */
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#define RUC_ABORT 0x0040 /* abort receiver operation immediately */
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#define CUC_MASK 0x0700 /* mask for CU command */
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#define CUC_NOP 0x0000 /* NOP-command */
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#define CUC_START 0x0100 /* start execution of 1. cmd on the CBL */
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#define CUC_RESUME 0x0200 /* resume after suspend */
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#define CUC_SUSPEND 0x0300 /* Suspend CU */
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#define CUC_ABORT 0x0400 /* abort command operation immediately */
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#define ACK_MASK 0xf000 /* mask for ACK command */
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#define ACK_CX 0x8000 /* acknowledges STAT_CX */
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#define ACK_FR 0x4000 /* ack. STAT_FR */
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#define ACK_CNA 0x2000 /* ack. STAT_CNA */
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#define ACK_RNR 0x1000 /* ack. STAT_RNR */
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/*
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* possible status values for the status word
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*/
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#define STAT_MASK 0xf000 /* mask for cause of interrupt */
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#define STAT_CX 0x8000 /* CU finished cmd with its I bit set */
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#define STAT_FR 0x4000 /* RU finished receiving a frame */
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#define STAT_CNA 0x2000 /* CU left active state */
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#define STAT_RNR 0x1000 /* RU left ready state */
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#define CU_STATUS 0x700 /* CU status, 0=idle */
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#define CU_SUSPEND 0x100 /* CU is suspended */
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#define CU_ACTIVE 0x200 /* CU is active */
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#define RU_STATUS 0x70 /* RU status, 0=idle */
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#define RU_SUSPEND 0x10 /* RU suspended */
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#define RU_NOSPACE 0x20 /* RU no resources */
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#define RU_READY 0x40 /* RU is ready */
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/*
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* Receive Frame Descriptor (RFD)
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*/
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struct rfd_struct
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{
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unsigned short status; /* status word */
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unsigned short last; /* Bit15,Last Frame on List / Bit14,suspend */
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unsigned short next; /* linkoffset to next RFD */
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unsigned short rbd_offset; /* pointeroffset to RBD-buffer */
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unsigned char dest[6]; /* ethernet-address, destination */
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unsigned char source[6]; /* ethernet-address, source */
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unsigned short length; /* 802.3 frame-length */
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unsigned short zero_dummy; /* dummy */
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};
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#define RFD_LAST 0x8000 /* last: last rfd in the list */
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#define RFD_SUSP 0x4000 /* last: suspend RU after */
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#define RFD_ERRMASK 0x0fe1 /* status: errormask */
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#define RFD_MATCHADD 0x0002 /* status: Destinationaddress !matches IA */
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#define RFD_RNR 0x0200 /* status: receiver out of resources */
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/*
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* Receive Buffer Descriptor (RBD)
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*/
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struct rbd_struct
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{
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unsigned short status; /* status word,number of used bytes in buff */
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unsigned short next; /* pointeroffset to next RBD */
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char *buffer; /* receive buffer address pointer */
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unsigned short size; /* size of this buffer */
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unsigned short zero_dummy; /* dummy */
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};
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#define RBD_LAST 0x8000 /* last buffer */
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#define RBD_USED 0x4000 /* this buffer has data */
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#define RBD_MASK 0x3fff /* size-mask for length */
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/*
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* Statusvalues for Commands/RFD
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*/
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#define STAT_COMPL 0x8000 /* status: frame/command is complete */
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#define STAT_BUSY 0x4000 /* status: frame/command is busy */
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#define STAT_OK 0x2000 /* status: frame/command is ok */
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/*
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* Action-Commands
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*/
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#define CMD_NOP 0x0000 /* NOP */
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#define CMD_IASETUP 0x0001 /* initial address setup command */
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#define CMD_CONFIGURE 0x0002 /* configure command */
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#define CMD_MCSETUP 0x0003 /* MC setup command */
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#define CMD_XMIT 0x0004 /* transmit command */
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#define CMD_TDR 0x0005 /* time domain reflectometer (TDR) command */
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#define CMD_DUMP 0x0006 /* dump command */
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#define CMD_DIAGNOSE 0x0007 /* diagnose command */
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/*
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* Action command bits
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*/
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#define CMD_LAST 0x8000 /* indicates last command in the CBL */
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#define CMD_SUSPEND 0x4000 /* suspend CU after this CB */
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#define CMD_INT 0x2000 /* generate interrupt after execution */
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/*
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* NOP - command
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*/
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struct nop_cmd_struct
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{
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unsigned short cmd_status; /* status of this command */
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unsigned short cmd_cmd; /* the command itself (+bits) */
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unsigned short cmd_link; /* offsetpointer to next command */
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};
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/*
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* IA Setup command
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*/
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struct iasetup_cmd_struct
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{
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unsigned short cmd_status;
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unsigned short cmd_cmd;
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unsigned short cmd_link;
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unsigned char iaddr[6];
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};
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/*
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* Configure command
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*/
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struct configure_cmd_struct
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{
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unsigned short cmd_status;
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unsigned short cmd_cmd;
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unsigned short cmd_link;
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unsigned char byte_cnt; /* size of the config-cmd */
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unsigned char fifo; /* fifo/recv monitor */
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unsigned char sav_bf; /* save bad frames (bit7=1)*/
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unsigned char adr_len; /* adr_len(0-2),al_loc(3),pream(4-5),loopbak(6-7)*/
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unsigned char priority; /* lin_prio(0-2),exp_prio(4-6),bof_metd(7) */
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unsigned char ifs; /* inter frame spacing */
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unsigned char time_low; /* slot time low */
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unsigned char time_high; /* slot time high(0-2) and max. retries(4-7) */
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unsigned char promisc; /* promisc-mode(0) , et al (1-7) */
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unsigned char carr_coll; /* carrier(0-3)/collision(4-7) stuff */
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unsigned char fram_len; /* minimal frame len */
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unsigned char dummy; /* dummy */
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};
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/*
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* Multicast Setup command
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*/
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struct mcsetup_cmd_struct
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{
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unsigned short cmd_status;
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unsigned short cmd_cmd;
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unsigned short cmd_link;
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unsigned short mc_cnt; /* number of bytes in the MC-List */
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unsigned char mc_list[0][6]; /* pointer to 6 bytes entries */
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};
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/*
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* transmit command
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*/
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struct transmit_cmd_struct
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{
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unsigned short cmd_status;
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unsigned short cmd_cmd;
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unsigned short cmd_link;
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unsigned short tbd_offset; /* pointeroffset to TBD */
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unsigned char dest[6]; /* destination address of the frame */
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unsigned short length; /* user defined: 802.3 length / Ether type */
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};
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#define TCMD_ERRMASK 0x0fa0
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#define TCMD_MAXCOLLMASK 0x000f
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#define TCMD_MAXCOLL 0x0020
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#define TCMD_HEARTBEAT 0x0040
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#define TCMD_DEFERRED 0x0080
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#define TCMD_UNDERRUN 0x0100
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#define TCMD_LOSTCTS 0x0200
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#define TCMD_NOCARRIER 0x0400
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#define TCMD_LATECOLL 0x0800
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struct tdr_cmd_struct
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{
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unsigned short cmd_status;
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unsigned short cmd_cmd;
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unsigned short cmd_link;
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unsigned short status;
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};
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#define TDR_LNK_OK 0x8000 /* No link problem identified */
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#define TDR_XCVR_PRB 0x4000 /* indicates a transceiver problem */
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#define TDR_ET_OPN 0x2000 /* open, no correct termination */
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#define TDR_ET_SRT 0x1000 /* TDR detected a short circuit */
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#define TDR_TIMEMASK 0x07ff /* mask for the time field */
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/*
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* Transmit Buffer Descriptor (TBD)
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*/
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struct tbd_struct
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{
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unsigned short size; /* size + EOF-Flag(15) */
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unsigned short next; /* pointeroffset to next TBD */
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char *buffer; /* pointer to buffer */
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};
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#define TBD_LAST 0x8000 /* EOF-Flag, indicates last buffer in list */
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/*************************************************************************/
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/*
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Verbatim from the Crynwyr stuff:
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The 3c523 responds with adapter code 0x6042 at slot
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registers xxx0 and xxx1. The setup register is at xxx2 and
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contains the following bits:
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0: card enable
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2,1: csr address select
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00 = 0300
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01 = 1300
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10 = 2300
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11 = 3300
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4,3: shared memory address select
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00 = 0c0000
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01 = 0c8000
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10 = 0d0000
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11 = 0d8000
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5: set to disable on-board thinnet
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7,6: (read-only) shows selected irq
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00 = 12
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01 = 7
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10 = 3
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11 = 9
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The interrupt-select register is at xxx3 and uses one bit per irq.
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0: int 12
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1: int 7
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2: int 3
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3: int 9
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Again, the documentation stresses that the setup register
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should never be written. The interrupt-select register may be
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written with the value corresponding to bits 7.6 in
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the setup register to insure corret setup.
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*/
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/* Offsets from the base I/O address. */
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#define ELMC_SA 0 /* first 6 bytes are IEEE network address */
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#define ELMC_CTRL 6 /* control & status register */
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#define ELMC_REVISION 7 /* revision register, first 4 bits only */
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#define ELMC_IO_EXTENT 8
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/* these are the bit selects for the port register 2 */
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#define ELMC_STATUS_ENABLED 0x01
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#define ELMC_STATUS_CSR_SELECT 0x06
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#define ELMC_STATUS_MEMORY_SELECT 0x18
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#define ELMC_STATUS_DISABLE_THIN 0x20
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#define ELMC_STATUS_IRQ_SELECT 0xc0
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/* this is the card id used in the detection code. You might recognize
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it from @6042.adf */
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#define ELMC_MCA_ID 0x6042
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/*
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The following define the bits for the control & status register
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The bank select registers can be used if more than 16K of memory is
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on the card. For some stupid reason, bank 3 is the one for the
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bottom 16K, and the card defaults to bank 0. So we have to set the
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bank to 3 before the card will even think of operating. To get bank
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3, set BS0 and BS1 to high (of course...)
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*/
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#define ELMC_CTRL_BS0 0x01 /* RW bank select */
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#define ELMC_CTRL_BS1 0x02 /* RW bank select */
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#define ELMC_CTRL_INTE 0x04 /* RW interrupt enable, assert high */
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#define ELMC_CTRL_INT 0x08 /* R interrupt active, assert high */
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/*#define ELMC_CTRL_* 0x10*/ /* reserved */
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#define ELMC_CTRL_LBK 0x20 /* RW loopback enable, assert high */
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#define ELMC_CTRL_CA 0x40 /* RW channel attention, assert high */
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#define ELMC_CTRL_RST 0x80 /* RW 82586 reset, assert low */
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/* some handy compound bits */
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/* normal operation should have bank 3 and RST high, ints enabled */
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#define ELMC_NORMAL (ELMC_CTRL_INTE|ELMC_CTRL_RST|0x3)
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#endif /* _3c523_INCLUDE_ */
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