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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [i386/] [pc386/] [3c509/] [elink.c] - Rev 173
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/* * Copyright (c) 1994 Charles Hannum. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Charles Hannum. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $Id: elink.c,v 1.2 2001-09-27 11:59:47 chris Exp $ */ /* * Common code for dealing with 3COM ethernet cards. */ #include <sys/types.h> #include "elink.h" extern void outb( unsigned short io_addr, unsigned char out_data ); /* * Issue a `global reset' to all cards. We have to be careful to do this only * once during autoconfig, to prevent resetting boards that have already been * configured. */ void elink_reset() { static int x = 0; if (x == 0) { x = 1; outb(ELINK_ID_PORT, ELINK_RESET); } } /* * The `ID sequence' is really just snapshots of an 8-bit CRC register as 0 * bits are shifted in. Different board types use different polynomials. */ void elink_idseq(u_char p) { register int i; register u_char c; c = 0xff; for (i = 255; i; i--) { outb(ELINK_ID_PORT, c); if (c & 0x80) { c <<= 1; c ^= p; } else c <<= 1; } }