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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: Ondrej Zary <linux@rainbow-software.org>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ondrej Zary 2010-09-23 10:59:18 +00:00 committed by David S. Miller
parent f064af1e50
commit e0f9c4f332
1 changed files with 10 additions and 2 deletions
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12
drivers/net/tulip/de2104x.c
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@ -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)
de->media[i].csr14 = t21041_csr14[i];
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];
}