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authorEugene Surovegin <ebs@ebshome.net>2005-12-27 12:36:41 -0800
committerJeff Garzik <jgarzik@pobox.com>2006-01-09 10:34:25 -0500
commit38843888e3e9fb7006d72d55b8e6ffcc925cf18a (patch)
treecd39ae82b4672ff76521dc645ca4a21f01baf613 /drivers/net/ibm_emac
parenta4bf26f30e398afa293b85103c885f03d4660a07 (diff)
downloadop-kernel-dev-38843888e3e9fb7006d72d55b8e6ffcc925cf18a.zip
op-kernel-dev-38843888e3e9fb7006d72d55b8e6ffcc925cf18a.tar.gz
[PATCH] PPC44x EMAC driver: disable TX status deferral in half-duplex mode
Disable TX status deferral (EMACx_MR[MWSW=001]) in half-duplex mode. I have two reports when EMAC stops transmitting when connected to a hub. TX ring debug printouts show complete mess when this happens, probably hardware collision handling doesn't work quite well in this mode. This is relevant only for SoCs with EMAC4 core (440GX, 440SP, 440SPe). Tested on 440GX. Signed-off-by: Eugene Surovegin <ebs@ebshome.net> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/net/ibm_emac')
-rw-r--r--drivers/net/ibm_emac/ibm_emac.h3
-rw-r--r--drivers/net/ibm_emac/ibm_emac_core.c2
2 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/ibm_emac/ibm_emac.h b/drivers/net/ibm_emac/ibm_emac.h
index 644edbf..c2dae60 100644
--- a/drivers/net/ibm_emac/ibm_emac.h
+++ b/drivers/net/ibm_emac/ibm_emac.h
@@ -110,6 +110,7 @@ struct emac_regs {
#define EMAC_MR1_TFS_2K 0x00080000
#define EMAC_MR1_TR0_MULT 0x00008000
#define EMAC_MR1_JPSM 0x00000000
+#define EMAC_MR1_MWSW_001 0x00000000
#define EMAC_MR1_BASE(opb) (EMAC_MR1_TFS_2K | EMAC_MR1_TR0_MULT)
#else
#define EMAC_MR1_RFS_4K 0x00180000
@@ -130,7 +131,7 @@ struct emac_regs {
(freq) <= 83 ? EMAC_MR1_OBCI_83 : \
(freq) <= 100 ? EMAC_MR1_OBCI_100 : EMAC_MR1_OBCI_100P)
#define EMAC_MR1_BASE(opb) (EMAC_MR1_TFS_2K | EMAC_MR1_TR | \
- EMAC_MR1_MWSW_001 | EMAC_MR1_OBCI(opb))
+ EMAC_MR1_OBCI(opb))
#endif
/* EMACx_TMR0 */
diff --git a/drivers/net/ibm_emac/ibm_emac_core.c b/drivers/net/ibm_emac/ibm_emac_core.c
index 1da8a66..591c586 100644
--- a/drivers/net/ibm_emac/ibm_emac_core.c
+++ b/drivers/net/ibm_emac/ibm_emac_core.c
@@ -408,7 +408,7 @@ static int emac_configure(struct ocp_enet_private *dev)
/* Mode register */
r = EMAC_MR1_BASE(emac_opb_mhz()) | EMAC_MR1_VLE | EMAC_MR1_IST;
if (dev->phy.duplex == DUPLEX_FULL)
- r |= EMAC_MR1_FDE;
+ r |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001;
dev->stop_timeout = STOP_TIMEOUT_10;
switch (dev->phy.speed) {
case SPEED_1000:
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