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ukphy_subr.c revision 1.2.14.1 
      1 /*	$NetBSD: ukphy_subr.c,v 1.2.14.1 1999/11/15 00:40:57 fvdl Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      9  * NASA Ames Research Center, and by Frank van der Linden.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the NetBSD
     22  *	Foundation, Inc. and its contributors.
     23  * 4. Neither the name of The NetBSD Foundation nor the names of its
     24  *    contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37  * POSSIBILITY OF SUCH DAMAGE.
     38  */
     39 
     40 /*
     41  * Subroutines shared by the ukphy driver and other PHY drivers.
     42  */
     43 
     44 #include <sys/param.h>
     45 #include <sys/systm.h>
     46 #include <sys/kernel.h>
     47 #include <sys/device.h>
     48 #include <sys/malloc.h>
     49 #include <sys/socket.h>
     50 
     51 #include <net/if.h>
     52 #include <net/if_media.h>
     53 
     54 #include <dev/mii/mii.h>
     55 #include <dev/mii/miivar.h>
     56 
     57 /*
     58  * Media status subroutine.  If a PHY driver does media detection simply
     59  * by decoding the NWay autonegotiation, use this routine.
     60  */
     61 void
     62 ukphy_status(phy)
     63 	struct mii_softc *phy;
     64 {
     65 	struct mii_data *mii = phy->mii_pdata;
     66 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
     67 	int bmsr, bmcr, anlpar;
     68 
     69 	mii->mii_media_status = IFM_AVALID;
     70 	mii->mii_media_active = IFM_ETHER;
     71 
     72 	bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
     73 	if (bmsr & BMSR_LINK)
     74 		mii->mii_media_status |= IFM_ACTIVE;
     75 
     76 	bmcr = PHY_READ(phy, MII_BMCR);
     77 	if (bmcr & BMCR_ISO) {
     78 		mii->mii_media_active |= IFM_NONE;
     79 		mii->mii_media_status = 0;
     80 		return;
     81 	}
     82 
     83 	if (bmcr & BMCR_LOOP)
     84 		mii->mii_media_active |= IFM_LOOP;
     85 
     86 	if (bmcr & BMCR_AUTOEN) {
     87 		/*
     88 		 * NWay autonegotiation takes the highest-order common
     89 		 * bit of the ANAR and ANLPAR (i.e. best media advertised
     90 		 * both by us and our link partner).
     91 		 */
     92 		if ((bmsr & BMSR_ACOMP) == 0) {
     93 			/* Erg, still trying, I guess... */
     94 			mii->mii_media_active |= IFM_NONE;
     95 			return;
     96 		}
     97 
     98 		anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
     99 		if (anlpar & ANLPAR_T4)
    100 			mii->mii_media_active |= IFM_100_T4;
    101 		else if (anlpar & ANLPAR_TX_FD)
    102 			mii->mii_media_active |= IFM_100_TX|IFM_FDX;
    103 		else if (anlpar & ANLPAR_TX)
    104 			mii->mii_media_active |= IFM_100_TX;
    105 		else if (anlpar & ANLPAR_10_FD)
    106 			mii->mii_media_active |= IFM_10_T|IFM_FDX;
    107 		else if (anlpar & ANLPAR_10)
    108 			mii->mii_media_active |= IFM_10_T;
    109 		else
    110 			mii->mii_media_active |= IFM_NONE;
    111 	} else
    112 		mii->mii_media_active = ife->ifm_media;
    113 }
    114