1139790Simp/*-
22268Sats * Copyright (c) 1994 Charles Hannum.  All rights reserved.
32268Sats *
42268Sats * Redistribution and use in source and binary forms, with or without
52268Sats * modification, are permitted provided that the following conditions
62268Sats * are met:
72268Sats * 1. Redistributions of source code must retain the above copyright
82268Sats *    notice, this list of conditions and the following disclaimer.
92268Sats * 2. Redistributions in binary form must reproduce the above copyright
102268Sats *    notice, this list of conditions and the following disclaimer in the
112268Sats *    documentation and/or other materials provided with the distribution.
122268Sats * 3. All advertising materials mentioning features or use of this software
132268Sats *    must display the following acknowledgement:
142268Sats *	This product includes software developed by Charles Hannum.
152268Sats * 4. The name of the author may not be used to endorse or promote products
162268Sats *    derived from this software without specific prior written permission.
172268Sats *
182268Sats * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
192268Sats * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
202268Sats * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
212268Sats * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
222268Sats * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
232268Sats * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
242268Sats * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
252268Sats * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
262268Sats * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
272268Sats * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
282268Sats */
292268Sats
30115703Sobrien#include <sys/cdefs.h>
31115703Sobrien__FBSDID("$FreeBSD$");
32115703Sobrien
332268Sats/*
342268Sats * Common code for dealing with 3COM ethernet cards.
352268Sats */
362268Sats
37112789Smdodd#include <sys/param.h>
38112789Smdodd#include <sys/systm.h>
39112789Smdodd#include <sys/kernel.h>
40112789Smdodd#include <sys/module.h>
416734Sbde
426734Sbde#include <machine/cpufunc.h>
436734Sbde
442268Sats#include <i386/isa/elink.h>
452268Sats
462268Sats/*
472268Sats * Issue a `global reset' to all cards.  We have to be careful to do this only
482268Sats * once during autoconfig, to prevent resetting boards that have already been
492268Sats * configured.
502268Sats */
512268Satsvoid
522268Satselink_reset()
538876Srgrimes{
542268Sats	static int x = 0;
552268Sats
562268Sats	if (x == 0) {
572268Sats		x = 1;
582268Sats		outb(ELINK_ID_PORT, ELINK_RESET);
592268Sats	}
60112789Smdodd	outb(ELINK_ID_PORT, 0);
61112789Smdodd	outb(ELINK_ID_PORT, 0);
62112789Smdodd
63112789Smdodd	return;
642268Sats}
652268Sats
662268Sats/*
672268Sats * The `ID sequence' is really just snapshots of an 8-bit CRC register as 0
682268Sats * bits are shifted in.  Different board types use different polynomials.
692268Sats */
702268Satsvoid
7128752Sbdeelink_idseq(u_char p)
722268Sats{
732268Sats	register int i;
742268Sats	register u_char c;
752268Sats
762268Sats	c = 0xff;
772268Sats	for (i = 255; i; i--) {
782268Sats		outb(ELINK_ID_PORT, c);
792268Sats		if (c & 0x80) {
802268Sats			c <<= 1;
812268Sats			c ^= p;
822268Sats		} else
832268Sats			c <<= 1;
842268Sats	}
852268Sats}
86112789Smdodd
87112789Smdoddstatic moduledata_t elink_mod = {
88112789Smdodd	"elink",/* module name */
89112789Smdodd	NULL,	/* event handler */
90241394Skevlo	0	/* extra data */
91112789Smdodd};
92112789Smdodd
93112789SmdoddDECLARE_MODULE(elink, elink_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
94112789SmdoddMODULE_VERSION(elink, 1);
95