source: rtems/c/src/lib/libbsp/i386/pc386/3c509/elink.c @ 838d714

4.11
Last change on this file since 838d714 was 838d714, checked in by Sebastian Huber <sebastian.huber@…>, on Aug 9, 2013 at 1:23:15 PM

bsp/pc386: Provide local outb() for elink driver

  • Property mode set to 100644
File size: 2.5 KB
Line 
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/*
31 * Common code for dealing with 3COM ethernet cards.
32 */
33
34#include <sys/types.h>
35
36#include "elink.h"
37
38#include <bsp.h>
39
40static void outb( unsigned short io_addr, unsigned char out_data )
41{
42  outport_byte( io_addr, out_data );
43}
44
45/*
46 * Issue a `global reset' to all cards.  We have to be careful to do this only
47 * once during autoconfig, to prevent resetting boards that have already been
48 * configured.
49 */
50void
51elink_reset()
52{
53        static int x = 0;
54
55        if (x == 0) {
56                x = 1;
57                outb(ELINK_ID_PORT, ELINK_RESET);
58        }
59}
60
61/*
62 * The `ID sequence' is really just snapshots of an 8-bit CRC register as 0
63 * bits are shifted in.  Different board types use different polynomials.
64 */
65void
66elink_idseq(u_char p)
67{
68        register int i;
69        register u_char c;
70
71        c = 0xff;
72        for (i = 255; i; i--) {
73                outb(ELINK_ID_PORT, c);
74                if (c & 0x80) {
75                        c <<= 1;
76                        c ^= p;
77                } else
78                        c <<= 1;
79        }
80}
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