/*------------------------------------------------------------------------ . 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_
/* 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 */
/*------------------------------------------------------------------------- . I define some macros to make it easier to do somewhat common . or slightly complicated, repeated tasks.
--------------------------------------------------------------------------*/
/*---------------------------------------------------------------------- . 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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