1/*-
2 * Copyright (c) 1994 Charles Hannum.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 * 3. All advertising materials mentioning features or use of this software
13 *    must display the following acknowledgement:
14 *	This product includes software developed by Charles Hannum.
15 * 4. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD$");
32
33/*
34 * Common code for dealing with 3COM ethernet cards.
35 */
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/kernel.h>
40#include <sys/module.h>
41
42#include <machine/cpufunc.h>
43
44#include <i386/isa/elink.h>
45
46/*
47 * Issue a `global reset' to all cards.  We have to be careful to do this only
48 * once during autoconfig, to prevent resetting boards that have already been
49 * configured.
50 */
51void
52elink_reset()
53{
54	static int x = 0;
55
56	if (x == 0) {
57		x = 1;
58		outb(ELINK_ID_PORT, ELINK_RESET);
59	}
60	outb(ELINK_ID_PORT, 0);
61	outb(ELINK_ID_PORT, 0);
62
63	return;
64}
65
66/*
67 * The `ID sequence' is really just snapshots of an 8-bit CRC register as 0
68 * bits are shifted in.  Different board types use different polynomials.
69 */
70void
71elink_idseq(u_char p)
72{
73	register int i;
74	register u_char c;
75
76	c = 0xff;
77	for (i = 255; i; i--) {
78		outb(ELINK_ID_PORT, c);
79		if (c & 0x80) {
80			c <<= 1;
81			c ^= p;
82		} else
83			c <<= 1;
84	}
85}
86
87static moduledata_t elink_mod = {
88	"elink",/* module name */
89	NULL,	/* event handler */
90	0	/* extra data */
91};
92
93DECLARE_MODULE(elink, elink_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
94MODULE_VERSION(elink, 1);
95