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Take advantage of new am7990 sc_nocarrier() function in order to do auto- 

matic media detection on Sun4m machines which support multiple media
(UTP and AUI). New function lenocarrier() switches media type when called
if no link? flags are set.

Redefine link flags for Lance ethernet (le):
	<none>:	switch between media as needed to find carrier (autodetect)
		Preference to whatever the PROM is using (AUI if not booted
		from the network)
	link0:	use UTP port only
	link1:	use AUI port only

This allows Sun4m machines with dual media Lance ethernet adapters to
boot from the network on the UTP port.
This commit is contained in:
abrown 1996-07-06 00:01:34 +00:00
parent de61f8f511
commit 0c6696de2d
1 changed files with 47 additions and 2 deletions
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49
sys/arch/sparc/dev/if_le.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: if_le.c,v 1.35 1996/05/16 22:57:32 pk Exp $ */
/* $NetBSD: if_le.c,v 1.36 1996/07/06 00:01:34 abrown Exp $ */
/*-
* Copyright (c) 1996
@ -108,6 +108,7 @@ struct cfattach le_ca = {
hide void lewrcsr __P((struct am7990_softc *, u_int16_t, u_int16_t));
hide u_int16_t lerdcsr __P((struct am7990_softc *, u_int16_t));
hide void lehwinit __P((struct am7990_softc *));
hide void lenocarrier __P((struct am7990_softc *));
hide void
lewrcsr(sc, port, val)
@ -145,7 +146,7 @@ lehwinit(sc)
if (ifp->if_flags & IFF_LINK0)
lesc->sc_dma->sc_regs->csr |= DE_AUI_TP;
else
else if (ifp->if_flags & IFF_LINK1)
lesc->sc_dma->sc_regs->csr &= ~DE_AUI_TP;
delay(20000); /* must not touch le for 20ms */
@ -153,6 +154,49 @@ lehwinit(sc)
#endif
}
hide void
lenocarrier(sc)
struct am7990_softc *sc;
{
#if defined(SUN4M)
struct le_softc *lesc = (struct le_softc *)sc;
if (CPU_ISSUN4M && lesc->sc_dma) {
struct ifnet *ifp = &sc->sc_arpcom.ac_if;
/*
* Check if the user has requested a certain cable type, and
* if so, honor that request.
*/
if (ifp->if_flags & IFF_LINK0)
printf("%s: lost carrier on UTP port\n",
sc->sc_dev.dv_xname);
else if (ifp->if_flags & IFF_LINK1)
printf("%s: lost carrier on AUI port\n",
sc->sc_dev.dv_xname);
else {
/*
* Switch cable type and inform the user that
* we have done so
*/
if (lesc->sc_dma->sc_regs->csr & DE_AUI_TP) {
printf("%s: no carrier on UTP port, "
"switching to AUI port\n",
sc->sc_dev.dv_xname);
lesc->sc_dma->sc_regs->csr &= ~DE_AUI_TP;
} else {
printf("%s: no carrier on AUI port, "
"switching to UTP port\n",
sc->sc_dev.dv_xname);
lesc->sc_dma->sc_regs->csr |= DE_AUI_TP;
}
delay(20000); /* make cable selection stick */
}
} else
#endif
printf("%s: lost carrier\n",sc->sc_dev.dv_xname);
}
int
lematch(parent, match, aux)
struct device *parent;
@ -218,6 +262,7 @@ leattach(parent, self, aux)
sc->sc_rdcsr = lerdcsr;
sc->sc_wrcsr = lewrcsr;
sc->sc_hwinit = lehwinit;
sc->sc_nocarrier = lenocarrier;
am7990_config(sc);