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mii_physubr.c revision 1.1 
      1 /*	$NetBSD: mii_physubr.c,v 1.1 1998/11/04 23:07:15 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.
     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 common to all PHYs.
     42  */
     43 
     44 #include <sys/param.h>
     45 #include <sys/device.h>
     46 #include <sys/systm.h>
     47 #include <sys/socket.h>
     48 
     49 #include <net/if.h>
     50 #include <net/if_media.h>
     51 
     52 #include <dev/mii/mii.h>
     53 #include <dev/mii/miivar.h>
     54 
     55 int
     56 mii_phy_auto(mii)
     57 	struct mii_softc *mii;
     58 {
     59 	int bmsr, i;
     60 
     61 	PHY_WRITE(mii, MII_ANAR,
     62 	    BMSR_MEDIA_TO_ANAR(mii->mii_capabilities) | ANAR_CSMA);
     63 	PHY_WRITE(mii, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
     64 
     65 	/* Wait 500ms for it to complete. */
     66 	for (i = 0; i < 500; i++) {
     67 		if ((bmsr = PHY_READ(mii, MII_BMSR)) & BMSR_ACOMP)
     68 			return (1);
     69 		delay(1000);
     70 	}
     71 #if 0
     72 	if ((bmsr & BMSR_ACOMP) == 0)
     73 		printf("%s: autonegotiation failed to complete\n",
     74 		    mii->mii_dev.dv_xname);
     75 #endif
     76 	return (0);
     77 }
     78