From a14bc2bb7075e59be635a2470dc0a32c5a0e8e21 Mon Sep 17 00:00:00 2001 From: Robert Healy Date: Tue, 12 Jul 2011 08:46:20 +0000 Subject: igb: Fix for DH89xxCC near end loopback test On this chipset it is required to configure the MPHY block for loopback tests. If MPHY is not configured then all loopback tests will report failures. Signed-off-by: Robert Healy Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/igb/igb_ethtool.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'drivers/net/igb/igb_ethtool.c') diff --git a/drivers/net/igb/igb_ethtool.c b/drivers/net/igb/igb_ethtool.c index ed63ff4cf6d6..ff244ce803ce 100644 --- a/drivers/net/igb/igb_ethtool.c +++ b/drivers/net/igb/igb_ethtool.c @@ -1461,6 +1461,22 @@ static int igb_setup_loopback_test(struct igb_adapter *adapter) /* use CTRL_EXT to identify link type as SGMII can appear as copper */ if (reg & E1000_CTRL_EXT_LINK_MODE_MASK) { + if ((hw->device_id == E1000_DEV_ID_DH89XXCC_SGMII) || + (hw->device_id == E1000_DEV_ID_DH89XXCC_SERDES) || + (hw->device_id == E1000_DEV_ID_DH89XXCC_BACKPLANE) || + (hw->device_id == E1000_DEV_ID_DH89XXCC_SFP)) { + + /* Enable DH89xxCC MPHY for near end loopback */ + reg = rd32(E1000_MPHY_ADDR_CTL); + reg = (reg & E1000_MPHY_ADDR_CTL_OFFSET_MASK) | + E1000_MPHY_PCS_CLK_REG_OFFSET; + wr32(E1000_MPHY_ADDR_CTL, reg); + + reg = rd32(E1000_MPHY_DATA); + reg |= E1000_MPHY_PCS_CLK_REG_DIGINELBEN; + wr32(E1000_MPHY_DATA, reg); + } + reg = rd32(E1000_RCTL); reg |= E1000_RCTL_LBM_TCVR; wr32(E1000_RCTL, reg); @@ -1502,6 +1518,23 @@ static void igb_loopback_cleanup(struct igb_adapter *adapter) u32 rctl; u16 phy_reg; + if ((hw->device_id == E1000_DEV_ID_DH89XXCC_SGMII) || + (hw->device_id == E1000_DEV_ID_DH89XXCC_SERDES) || + (hw->device_id == E1000_DEV_ID_DH89XXCC_BACKPLANE) || + (hw->device_id == E1000_DEV_ID_DH89XXCC_SFP)) { + u32 reg; + + /* Disable near end loopback on DH89xxCC */ + reg = rd32(E1000_MPHY_ADDR_CTL); + reg = (reg & E1000_MPHY_ADDR_CTL_OFFSET_MASK) | + E1000_MPHY_PCS_CLK_REG_OFFSET; + wr32(E1000_MPHY_ADDR_CTL, reg); + + reg = rd32(E1000_MPHY_DATA); + reg &= ~E1000_MPHY_PCS_CLK_REG_DIGINELBEN; + wr32(E1000_MPHY_DATA, reg); + } + rctl = rd32(E1000_RCTL); rctl &= ~(E1000_RCTL_LBM_TCVR | E1000_RCTL_LBM_MAC); wr32(E1000_RCTL, rctl); -- cgit v1.2.3