From 9036240993b3c7d76e2403a71780c46f964ec0d0 Mon Sep 17 00:00:00 2001 From: "George V. Neville-Neil" Date: Thu, 4 Dec 2008 20:32:53 +0000 Subject: [PATCH] Fix a bug with the ael1006 PHY. The bug shows up as persistent but incomplete packet loss, of between 10-30%. The fix is to put the PHY into and take it out of local loopback mode when resetting the interface. Obtained from: Chelsio Inc. MFC after: 3 days --- sys/dev/cxgb/common/cxgb_ael1002.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/sys/dev/cxgb/common/cxgb_ael1002.c b/sys/dev/cxgb/common/cxgb_ael1002.c index 99bfb7611427..55c642155dc0 100644 --- a/sys/dev/cxgb/common/cxgb_ael1002.c +++ b/sys/dev/cxgb/common/cxgb_ael1002.c @@ -205,6 +205,16 @@ static int ael1006_reset(struct cphy *phy, int wait) t3_write_reg(phy->adapter, A_T3DBG_GPIO_EN, gpio_out); msleep(125); t3_phy_reset(phy, MDIO_DEV_PMA_PMD, wait); + + /* Phy loopback work around for ael1006 */ + /* Soft reset phy by toggling loopback */ + msleep(125); + /* Put phy into local loopback */ + t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, MII_BMCR, 0, 1); + msleep(125); + /* Take phy out of local loopback */ + t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, MII_BMCR, 1, 0); + return 0; }