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ukphy_subr.c revision 1.3.8.2 
      1 /*	$NetBSD: ukphy_subr.c,v 1.3.8.2 2002/01/10 19:56:19 thorpej 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/cdefs.h>
     45 __KERNEL_RCSID(0, "$NetBSD: ukphy_subr.c,v 1.3.8.2 2002/01/10 19:56:19 thorpej Exp $");
     46 
     47 #include <sys/param.h>
     48 #include <sys/systm.h>
     49 #include <sys/kernel.h>
     50 #include <sys/device.h>
     51 #include <sys/malloc.h>
     52 #include <sys/socket.h>
     53 
     54 #include <net/if.h>
     55 #include <net/if_media.h>
     56 
     57 #include <dev/mii/mii.h>
     58 #include <dev/mii/miivar.h>
     59 
     60 /*
     61  * Media status subroutine.  If a PHY driver does media detection simply
     62  * by decoding the NWay autonegotiation, use this routine.
     63  */
     64 void
     65 ukphy_status(struct mii_softc *phy)
     66 {
     67 	struct mii_data *mii = phy->mii_pdata;
     68 	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
     69 	int bmsr, bmcr, anlpar;
     70 
     71 	mii->mii_media_status = IFM_AVALID;
     72 	mii->mii_media_active = IFM_ETHER;
     73 
     74 	bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
     75 	if (bmsr & BMSR_LINK)
     76 		mii->mii_media_status |= IFM_ACTIVE;
     77 
     78 	bmcr = PHY_READ(phy, MII_BMCR);
     79 	if (bmcr & BMCR_ISO) {
     80 		mii->mii_media_active |= IFM_NONE;
     81 		mii->mii_media_status = 0;
     82 		return;
     83 	}
     84 
     85 	if (bmcr & BMCR_LOOP)
     86 		mii->mii_media_active |= IFM_LOOP;
     87 
     88 	if (bmcr & BMCR_AUTOEN) {
     89 		/*
     90 		 * NWay autonegotiation takes the highest-order common
     91 		 * bit of the ANAR and ANLPAR (i.e. best media advertised
     92 		 * both by us and our link partner).
     93 		 */
     94 		if ((bmsr & BMSR_ACOMP) == 0) {
     95 			/* Erg, still trying, I guess... */
     96 			mii->mii_media_active |= IFM_NONE;
     97 			return;
     98 		}
     99 
    100 		anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
    101 		if (anlpar & ANLPAR_T4)
    102 			mii->mii_media_active |= IFM_100_T4;
    103 		else if (anlpar & ANLPAR_TX_FD)
    104 			mii->mii_media_active |= IFM_100_TX|IFM_FDX;
    105 		else if (anlpar & ANLPAR_TX)
    106 			mii->mii_media_active |= IFM_100_TX;
    107 		else if (anlpar & ANLPAR_10_FD)
    108 			mii->mii_media_active |= IFM_10_T|IFM_FDX;
    109 		else if (anlpar & ANLPAR_10)
    110 			mii->mii_media_active |= IFM_10_T;
    111 		else
    112 			mii->mii_media_active |= IFM_NONE;
    113 	} else
    114 		mii->mii_media_active = ife->ifm_media;
    115 }
    116