Commit e0f9c4f3 authored by Ondrej Zary's avatar Ondrej Zary Committed by David S. Miller
Browse files

de2104x: disable autonegotiation on broken hardware 



At least on older 21041-AA chips (mine is rev. 11), TP duplex autonegotiation
causes the card not to work at all (link is up but no packets are transmitted).

de4x5 disables autonegotiation completely. But it seems to work on newer
(21041-PA rev. 21) so disable it only on rev<20 chips.

Signed-off-by: default avatarOndrej Zary <linux@rainbow-software.org>
Acked-by: default avatarJeff Garzik <jgarzik@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f064af1e

drivers/net/tulip/de2104x.c

+10 −2
Original line number Diff line number Diff line
@@ -364,6 +364,8 @@ static u16 t21040_csr15[] = { 0, 0, 0x0006, 0x0000, 0x0000, }; 
/* 21041 transceiver register settings: TP AUTO, BNC, AUI, TP, TP FD*/

static u16 t21041_csr13[] = { 0xEF01, 0xEF09, 0xEF09, 0xEF01, 0xEF09, };

static u16 t21041_csr14[] = { 0xFFFF, 0xF7FD, 0xF7FD, 0x6F3F, 0x6F3D, };

/* If on-chip autonegotiation is broken, use half-duplex (FF3F) instead */

static u16 t21041_csr14_brk[] = { 0xFF3F, 0xF7FD, 0xF7FD, 0x6F3F, 0x6F3D, };

static u16 t21041_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, };
@@ -1911,8 +1913,14 @@ fill_defaults: 
	for (i = 0; i < DE_MAX_MEDIA; i++) {

		if (de->media[i].csr13 == 0xffff)

			de->media[i].csr13 = t21041_csr13[i];

		if (de->media[i].csr14 == 0xffff)

		if (de->media[i].csr14 == 0xffff) {

			/* autonegotiation is broken at least on some chip

			   revisions - rev. 0x21 works, 0x11 does not */

			if (de->pdev->revision < 0x20)

				de->media[i].csr14 = t21041_csr14_brk[i];

			else

				de->media[i].csr14 = t21041_csr14[i];

		}

		if (de->media[i].csr15 == 0xffff)

			de->media[i].csr15 = t21041_csr15[i];

	}

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