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On Mon, Apr 17, 2006 at 12:55:53PM -0500, Jonathan A. Kollasch wrote:
> I noticed in sys/arch/sparc64/dev/sab82532reg.h:
>=20
> #define SAB_CCR4_ICD    0x10    /* invert polarity of carrier detect */
>=20
> but it is not used in sab.c.  I might try adding that bit to SAB_CCR4
> in sabtty_reset().  Also, I'll try connecting between two my two
> Ultra boxes.

Ok, the two Sun boxes both have carrier problem errors, but I almost
expected as much.

So, I tried a modified kernel:

--- sys/arch/sparc64/dev/sab.c.orig     2006-03-28 11:38:27.000000000 -0600
+++ sys/arch/sparc64/dev/sab.c  2006-04-17 13:19:09.000000000 -0500
@@ -1109,7 +1109,7 @@
        SAB_WRITE(sc, SAB_CCR1, SAB_CCR1_ODS | SAB_CCR1_BCR | SAB_CCR1_CM_7=
);
        SAB_WRITE(sc, SAB_CCR2, SAB_CCR2_BDF | SAB_CCR2_SSEL | SAB_CCR2_TOE=
);
        SAB_WRITE(sc, SAB_CCR3, 0);
-       SAB_WRITE(sc, SAB_CCR4, SAB_CCR4_MCK4 | SAB_CCR4_EBRG);
+       SAB_WRITE(sc, SAB_CCR4, SAB_CCR4_MCK4 | SAB_CCR4_EBRG | SAB_CCR4_IC=
D);
        SAB_WRITE(sc, SAB_MODE, SAB_MODE_RTS | SAB_MODE_FCTS | SAB_MODE_RAC=
);
        SAB_WRITE(sc, SAB_RFC,
            SAB_RFC_DPS | SAB_RFC_RFDF | SAB_RFC_RFTH_32CHAR);

and wouldn't you know it, it works normally for PPP even.

One *BIT* fixed it.  This must have been broken since the import from
OpenBSD.

I'd appreciate testing to make sure this isn't a fix for a hardware
inconsistency isolated to the Ultra 5/10.  (If any other hardware even
uses sabtty(4).)

	Jonathan Kollasch

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