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Some PHYs are really braindead, and report incorrect IDs. Simplify the 

test for this, and probe for PHYs based on media in the BMSR.
This commit is contained in:
thorpej 1999-02-05 02:46:34 +00:00
parent ebf3a97519
commit f9467ddb8e
1 changed files with 17 additions and 20 deletions
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37
sys/dev/mii/mii.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: mii.c,v 1.10 1999/01/29 07:35:05 pk Exp $ */
/* $NetBSD: mii.c,v 1.11 1999/02/05 02:46:34 thorpej Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -69,35 +69,32 @@ mii_phy_probe(parent, mii, capmask)
{
struct mii_attach_args ma;
struct mii_softc *child;
int bmsr;
LIST_INIT(&mii->mii_phys);
for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) {
/*
* Check to see if there is a PHY at this address. If
* the register contains garbage, assume no.
* Check to see if there is a PHY at this address. Note,
* many braindead PHYs report 0/0 in their ID registers,
* so we test for media in the BMSR.
*/
bmsr = (*mii->mii_readreg)(parent, ma.mii_phyno, MII_BMSR);
if (bmsr == 0 || bmsr == 0xffff ||
(bmsr & BMSR_MEDIAMASK) == 0) {
/* Assume no PHY at this address. */
continue;
}
/*
* Extract the IDs. Braindead PHYs will be handled by
* the `ukphy' driver, as we have no ID information to
* match on.
*/
ma.mii_id1 = (*mii->mii_readreg)(parent, ma.mii_phyno,
MII_PHYIDR1);
ma.mii_id2 = (*mii->mii_readreg)(parent, ma.mii_phyno,
MII_PHYIDR2);
if (ma.mii_id1 == 0 || ma.mii_id1 == 0xffff ||
ma.mii_id2 == 0 || ma.mii_id2 == 0xffff) {
/*
* ARGH!! 3Com internal PHYs report 0/0 in their
* ID registers! If we spot this, check to see
* if the BMSR has reasonable data in it.
*/
if (MII_OUI(ma.mii_id1, ma.mii_id2) == 0 &&
MII_MODEL(ma.mii_id2) == 0) {
int bmsr = (*mii->mii_readreg)(parent,
ma.mii_phyno, MII_BMSR);
if (bmsr == 0 || bmsr == 0xffff ||
(bmsr & BMSR_MEDIAMASK) == 0)
continue;
} else
continue;
}
ma.mii_data = mii;
ma.mii_capmask = capmask;