elink.c revision 285830
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: releng/10.2/sys/i386/isa/elink.c 241394 2012-10-10 08:36:38Z kevlo $"); 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