From 99870a73d406e5bd235bc8e5aca6893a68184881 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Tue, 3 Aug 2010 11:50:08 +0000 Subject: [PATCH] igb: Program MDICNFG register prior to PHY init This patch addresses an issue seen on 82580 in which the MDICNFG register will be reset during a single function reset and as a result we will be unable to communicate with the PHY. To correct the issue, added a call to reset_mdicnfg just prior to the first access of the MDICNFG register in sgnii_uses_mdio. Signed-off-by: Alexander Duyck Tested-by: Jeff Pieper Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/igb/e1000_82575.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/net/igb/e1000_82575.c b/drivers/net/igb/e1000_82575.c index cc58227af424..187622f1c816 100644 --- a/drivers/net/igb/e1000_82575.c +++ b/drivers/net/igb/e1000_82575.c @@ -63,6 +63,7 @@ static bool igb_sgmii_active_82575(struct e1000_hw *); static s32 igb_reset_init_script_82575(struct e1000_hw *); static s32 igb_read_mac_addr_82575(struct e1000_hw *); static s32 igb_set_pcie_completion_timeout(struct e1000_hw *hw); +static s32 igb_reset_mdicnfg_82580(struct e1000_hw *hw); static const u16 e1000_82580_rxpbs_table[] = { 36, 72, 144, 1, 2, 4, 8, 16, @@ -159,20 +160,15 @@ static s32 igb_get_invariants_82575(struct e1000_hw *hw) switch (ctrl_ext & E1000_CTRL_EXT_LINK_MODE_MASK) { case E1000_CTRL_EXT_LINK_MODE_SGMII: dev_spec->sgmii_active = true; - ctrl_ext |= E1000_CTRL_I2C_ENA; break; case E1000_CTRL_EXT_LINK_MODE_1000BASE_KX: case E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES: hw->phy.media_type = e1000_media_type_internal_serdes; - ctrl_ext |= E1000_CTRL_I2C_ENA; break; default: - ctrl_ext &= ~E1000_CTRL_I2C_ENA; break; } - wr32(E1000_CTRL_EXT, ctrl_ext); - /* Set mta register count */ mac->mta_reg_count = 128; /* Set rar entry count */ @@ -250,11 +246,19 @@ static s32 igb_get_invariants_82575(struct e1000_hw *hw) phy->autoneg_mask = AUTONEG_ADVERTISE_SPEED_DEFAULT; phy->reset_delay_us = 100; + ctrl_ext = rd32(E1000_CTRL_EXT); + /* PHY function pointers */ - if (igb_sgmii_active_82575(hw)) + if (igb_sgmii_active_82575(hw)) { phy->ops.reset = igb_phy_hw_reset_sgmii_82575; - else + ctrl_ext |= E1000_CTRL_I2C_ENA; + } else { phy->ops.reset = igb_phy_hw_reset; + ctrl_ext &= ~E1000_CTRL_I2C_ENA; + } + + wr32(E1000_CTRL_EXT, ctrl_ext); + igb_reset_mdicnfg_82580(hw); if (igb_sgmii_active_82575(hw) && !igb_sgmii_uses_mdio_82575(hw)) { phy->ops.read_reg = igb_read_phy_reg_sgmii_82575;