80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
/*
|
|
* Common code for dealing with 3COM ethernet cards.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/cdefs.h>
|
|
|
|
#include <machine/cpufunc.h>
|
|
|
|
#include <i386/isa/elink.h>
|
|
|
|
/*
|
|
* 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(p)
|
|
register 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;
|
|
}
|
|
}
|