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igb: Unset sigdetect for SERDES loopback on 82580 and i350

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This patch unsets the sigdetect bit for SERDES loopback tests on 82580 and
i350 parts.  The loopback test can fail on these parts without this
setting.

Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Carolyn Wyborny 2012-11-22 02:49:22 +00:00 committed by Jeff Kirsher
parent a0483e2eb6
commit 3860a0bf74
2 changed files with 16 additions and 0 deletions
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2
drivers/net/ethernet/intel/igb/igb.h
View File

@ -42,6 +42,8 @@
struct igb_adapter;
#define E1000_PCS_CFG_IGN_SD 1
/* Interrupt defines */
#define IGB_START_ITR 648 /* ~6000 ints/sec */
#define IGB_4K_ITR 980

14
drivers/net/ethernet/intel/igb/igb_ethtool.c
View File

@ -1624,6 +1624,20 @@ static int igb_setup_loopback_test(struct igb_adapter *adapter)
reg &= ~E1000_CONNSW_ENRGSRC;
wr32(E1000_CONNSW, reg);
/* Unset sigdetect for SERDES loopback on
* 82580 and i350 devices.
*/
switch (hw->mac.type) {
case e1000_82580:
case e1000_i350:
reg = rd32(E1000_PCS_CFG0);
reg |= E1000_PCS_CFG_IGN_SD;
wr32(E1000_PCS_CFG0, reg);
break;
default:
break;
}
/* Set PCS register for forced speed */
reg = rd32(E1000_PCS_LCTL);
reg &= ~E1000_PCS_LCTL_AN_ENABLE; /* Disable Autoneg*/