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/*------------------------------------------------------------------------
. smc9194.h
. Copyright (C) 1996 by Erik Stahlman
.
. This software may be used and distributed according to the terms
. of the GNU General Public License, incorporated herein by reference.
.
. This file contains register information and access macros for
. the SMC91xxx chipset.
.
. Information contained in this file was obtained from the SMC91C94
. manual from SMC. To get a copy, if you really want one, you can find
. information under www.smc.com in the components division.
. ( this thanks to advice from Donald Becker ).
.
. Authors
. Erik Stahlman ( erik@vt.edu )
.
. History
. 01/06/96 Erik Stahlman moved definitions here from main .c file
. 01/19/96 Erik Stahlman polished this up some, and added better
. error handling
.
---------------------------------------------------------------------------*/
#ifndef _SMC9194_H_
#define _SMC9194_H_
/* I want some simple types */
typedef unsigned char byte;
typedef unsigned short word;
typedef unsigned long int dword;
/* Because of bank switching, the SMC91xxx uses only 16 I/O ports */
#define SMC_IO_EXTENT 16
/*---------------------------------------------------------------
.
. A description of the SMC registers is probably in order here,
. although for details, the SMC datasheet is invaluable.
.
. Basically, the chip has 4 banks of registers ( 0 to 3 ), which
. are accessed by writing a number into the BANK_SELECT register
. ( I also use a SMC_SELECT_BANK macro for this ).
.
. The banks are configured so that for most purposes, bank 2 is all
. that is needed for simple run time tasks.
-----------------------------------------------------------------------*/
/*
. Bank Select Register:
.
. yyyy yyyy 0000 00xx
. xx = bank number
. yyyy yyyy = 0x33, for identification purposes.
*/
#define BANK_SELECT 14
/* BANK 0 */
#define TCR 0 /* transmit control register */
#define TCR_ENABLE 0x0001 /* if this is 1, we can transmit */
#define TCR_FDUPLX 0x0800 /* receive packets sent out */
#define TCR_STP_SQET 0x1000 /* stop transmitting if Signal quality error */
#define TCR_MON_CNS 0x0400 /* monitors the carrier status */
#define TCR_PAD_ENABLE 0x0080 /* pads short packets to 64 bytes */
#define TCR_CLEAR 0 /* do NOTHING */
/* the normal settings for the TCR register : */
/* QUESTION: do I want to enable padding of short packets ? */
#define TCR_NORMAL TCR_ENABLE
#define EPH_STATUS 2
#define ES_LINK_OK 0x4000 /* is the link integrity ok ? */
#define RCR 4
#define RCR_SOFTRESET 0x8000 /* resets the chip */
#define RCR_STRIP_CRC 0x200 /* strips CRC */
#define RCR_ENABLE 0x100 /* IFF this is set, we can receive packets */
#define RCR_ALMUL 0x4 /* receive all multicast packets */
#define RCR_PROMISC 0x2 /* enable promiscuous mode */
/* the normal settings for the RCR register : */
#define RCR_NORMAL (RCR_STRIP_CRC | RCR_ENABLE)
#define RCR_CLEAR 0x0 /* set it to a base state */
#define COUNTER 6
#define MIR 8
#define MCR 10
/* 12 is reserved */
/* BANK 1 */
#define CONFIG 0
#define CFG_AUI_SELECT 0x100
#define BASE 2
#define ADDR0 4
#define ADDR1 6
#define ADDR2 8
#define GENERAL 10
#define CONTROL 12
#define CTL_POWERDOWN 0x2000
#define CTL_LE_ENABLE 0x80
#define CTL_CR_ENABLE 0x40
#define CTL_TE_ENABLE 0x0020
#define CTL_AUTO_RELEASE 0x0800
#define CTL_EPROM_ACCESS 0x0003 /* high if Eprom is being read */
/* BANK 2 */
#define MMU_CMD 0
#define MC_BUSY 1 /* only readable bit in the register */
#define MC_NOP 0
#define MC_ALLOC 0x20 /* or with number of 256 byte packets */
#define MC_RESET 0x40
#define MC_REMOVE 0x60 /* remove the current rx packet */
#define MC_RELEASE 0x80 /* remove and release the current rx packet */
#define MC_FREEPKT 0xA0 /* Release packet in PNR register */
#define MC_ENQUEUE 0xC0 /* Enqueue the packet for transmit */
#define PNR_ARR 2
#define FIFO_PORTS 4
#define FP_RXEMPTY 0x8000
#define FP_TXEMPTY 0x80
#define POINTER 6
#define PTR_READ 0x2000
#define PTR_RCV 0x8000
#define PTR_AUTOINC 0x4000
#define PTR_AUTO_INC 0x0040
#define DATA_1 8
#define DATA_2 10
#define INTERRUPT 12
#define INT_MASK 13
#define IM_RCV_INT 0x1
#define IM_TX_INT 0x2
#define IM_TX_EMPTY_INT 0x4
#define IM_ALLOC_INT 0x8
#define IM_RX_OVRN_INT 0x10
#define IM_EPH_INT 0x20
#define IM_ERCV_INT 0x40 /* not on SMC9192 */
/* BANK 3 */
#define MULTICAST1 0
#define MULTICAST2 2
#define MULTICAST3 4
#define MULTICAST4 6
#define MGMT 8
#define REVISION 10 /* ( hi: chip id low: rev # ) */
/* this is NOT on SMC9192 */
#define ERCV 12
#define CHIP_9190 3
#define CHIP_9194 4
#define CHIP_9195 5
#define CHIP_91100 7
static const char * chip_ids[ 15 ] = {
NULL, NULL, NULL,
/* 3 */ "SMC91C90/91C92",
/* 4 */ "SMC91C94",
/* 5 */ "SMC91C95",
NULL,
/* 7 */ "SMC91C100",
NULL, NULL, NULL, NULL,
NULL, NULL, NULL};
/*
. Transmit status bits
*/
#define TS_SUCCESS 0x0001
#define TS_LOSTCAR 0x0400
#define TS_LATCOL 0x0200
#define TS_16COL 0x0010
/*
. Receive status bits
*/
#define RS_ALGNERR 0x8000
#define RS_BADCRC 0x2000
#define RS_ODDFRAME 0x1000
#define RS_TOOLONG 0x0800
#define RS_TOOSHORT 0x0400
#define RS_MULTICAST 0x0001
#define RS_ERRORS (RS_ALGNERR | RS_BADCRC | RS_TOOLONG | RS_TOOSHORT)
static const char * interfaces[ 2 ] = { "TP", "AUI" };
/*-------------------------------------------------------------------------
. I define some macros to make it easier to do somewhat common
. or slightly complicated, repeated tasks.
--------------------------------------------------------------------------*/
/* select a register bank, 0 to 3 */
#define SMC_SELECT_BANK(x) { outw( x, ioaddr + BANK_SELECT ); }
/* define a small delay for the reset */
#define SMC_DELAY() { inw( ioaddr + RCR );\
inw( ioaddr + RCR );\
inw( ioaddr + RCR ); }
/* this enables an interrupt in the interrupt mask register */
#define SMC_ENABLE_INT(x) {\
unsigned char mask;\
SMC_SELECT_BANK(2);\
mask = inb( ioaddr + INT_MASK );\
mask |= (x);\
outb( mask, ioaddr + INT_MASK ); \
}
/* this disables an interrupt from the interrupt mask register */
#define SMC_DISABLE_INT(x) {\
unsigned char mask;\
SMC_SELECT_BANK(2);\
mask = inb( ioaddr + INT_MASK );\
mask &= ~(x);\
outb( mask, ioaddr + INT_MASK ); \
}
/*----------------------------------------------------------------------
. Define the interrupts that I want to receive from the card
.
. I want:
. IM_EPH_INT, for nasty errors
. IM_RCV_INT, for happy received packets
. IM_RX_OVRN_INT, because I have to kick the receiver
--------------------------------------------------------------------------*/
#define SMC_INTERRUPT_MASK (IM_EPH_INT | IM_RX_OVRN_INT | IM_RCV_INT)
#endif /* _SMC_9194_H_ */
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