diff options
Diffstat (limited to 'drivers/net/ethernet/intel/e1000e/ich8lan.c')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/ich8lan.c | 83 |
1 files changed, 50 insertions, 33 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c index 78d03d315421..af08188d7e62 100644 --- a/drivers/net/ethernet/intel/e1000e/ich8lan.c +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c @@ -185,6 +185,7 @@ static bool e1000_phy_is_accessible_pchlan(struct e1000_hw *hw) u32 phy_id = 0; s32 ret_val; u16 retry_count; + u32 mac_reg = 0; for (retry_count = 0; retry_count < 2; retry_count++) { ret_val = e1e_rphy_locked(hw, MII_PHYSID1, &phy_reg); @@ -203,11 +204,11 @@ static bool e1000_phy_is_accessible_pchlan(struct e1000_hw *hw) if (hw->phy.id) { if (hw->phy.id == phy_id) - return true; + goto out; } else if (phy_id) { hw->phy.id = phy_id; hw->phy.revision = (u32)(phy_reg & ~PHY_REVISION_MASK); - return true; + goto out; } /* In case the PHY needs to be in mdio slow mode, @@ -219,7 +220,22 @@ static bool e1000_phy_is_accessible_pchlan(struct e1000_hw *hw) ret_val = e1000e_get_phy_id(hw); hw->phy.ops.acquire(hw); - return !ret_val; + if (ret_val) + return false; +out: + if (hw->mac.type == e1000_pch_lpt) { + /* Unforce SMBus mode in PHY */ + e1e_rphy_locked(hw, CV_SMB_CTRL, &phy_reg); + phy_reg &= ~CV_SMB_CTRL_FORCE_SMBUS; + e1e_wphy_locked(hw, CV_SMB_CTRL, phy_reg); + + /* Unforce SMBus mode in MAC */ + mac_reg = er32(CTRL_EXT); + mac_reg &= ~E1000_CTRL_EXT_FORCE_SMBUS; + ew32(CTRL_EXT, mac_reg); + } + + return true; } /** @@ -233,7 +249,6 @@ static s32 e1000_init_phy_workarounds_pchlan(struct e1000_hw *hw) { u32 mac_reg, fwsm = er32(FWSM); s32 ret_val; - u16 phy_reg; /* Gate automatic PHY configuration by hardware on managed and * non-managed 82579 and newer adapters. @@ -262,22 +277,16 @@ static s32 e1000_init_phy_workarounds_pchlan(struct e1000_hw *hw) mac_reg |= E1000_CTRL_EXT_FORCE_SMBUS; ew32(CTRL_EXT, mac_reg); + /* Wait 50 milliseconds for MAC to finish any retries + * that it might be trying to perform from previous + * attempts to acknowledge any phy read requests. + */ + msleep(50); + /* fall-through */ case e1000_pch2lan: - if (e1000_phy_is_accessible_pchlan(hw)) { - if (hw->mac.type == e1000_pch_lpt) { - /* Unforce SMBus mode in PHY */ - e1e_rphy_locked(hw, CV_SMB_CTRL, &phy_reg); - phy_reg &= ~CV_SMB_CTRL_FORCE_SMBUS; - e1e_wphy_locked(hw, CV_SMB_CTRL, phy_reg); - - /* Unforce SMBus mode in MAC */ - mac_reg = er32(CTRL_EXT); - mac_reg &= ~E1000_CTRL_EXT_FORCE_SMBUS; - ew32(CTRL_EXT, mac_reg); - } + if (e1000_phy_is_accessible_pchlan(hw)) break; - } /* fall-through */ case e1000_pchlan: @@ -287,6 +296,7 @@ static s32 e1000_init_phy_workarounds_pchlan(struct e1000_hw *hw) if (hw->phy.ops.check_reset_block(hw)) { e_dbg("Required LANPHYPC toggle blocked by ME\n"); + ret_val = -E1000_ERR_PHY; break; } @@ -298,15 +308,6 @@ static s32 e1000_init_phy_workarounds_pchlan(struct e1000_hw *hw) mac_reg |= E1000_FEXTNVM3_PHY_CFG_COUNTER_50MSEC; ew32(FEXTNVM3, mac_reg); - if (hw->mac.type == e1000_pch_lpt) { - /* Toggling LANPHYPC brings the PHY out of SMBus mode - * So ensure that the MAC is also out of SMBus mode - */ - mac_reg = er32(CTRL_EXT); - mac_reg &= ~E1000_CTRL_EXT_FORCE_SMBUS; - ew32(CTRL_EXT, mac_reg); - } - /* Toggle LANPHYPC Value bit */ mac_reg = er32(CTRL); mac_reg |= E1000_CTRL_LANPHYPC_OVERRIDE; @@ -325,6 +326,21 @@ static s32 e1000_init_phy_workarounds_pchlan(struct e1000_hw *hw) usleep_range(5000, 10000); } while (!(er32(CTRL_EXT) & E1000_CTRL_EXT_LPCD) && count--); + usleep_range(30000, 60000); + if (e1000_phy_is_accessible_pchlan(hw)) + break; + + /* Toggling LANPHYPC brings the PHY out of SMBus mode + * so ensure that the MAC is also out of SMBus mode + */ + mac_reg = er32(CTRL_EXT); + mac_reg &= ~E1000_CTRL_EXT_FORCE_SMBUS; + ew32(CTRL_EXT, mac_reg); + + if (e1000_phy_is_accessible_pchlan(hw)) + break; + + ret_val = -E1000_ERR_PHY; } break; default: @@ -332,13 +348,14 @@ static s32 e1000_init_phy_workarounds_pchlan(struct e1000_hw *hw) } hw->phy.ops.release(hw); - - /* Reset the PHY before any access to it. Doing so, ensures - * that the PHY is in a known good state before we read/write - * PHY registers. The generic reset is sufficient here, - * because we haven't determined the PHY type yet. - */ - ret_val = e1000e_phy_hw_reset_generic(hw); + if (!ret_val) { + /* Reset the PHY before any access to it. Doing so, ensures + * that the PHY is in a known good state before we read/write + * PHY registers. The generic reset is sufficient here, + * because we haven't determined the PHY type yet. + */ + ret_val = e1000e_phy_hw_reset_generic(hw); + } out: /* Ungate automatic PHY configuration on non-managed 82579 */ |