phy_data |= M88E1000_PSCR_POLARITY_REVERSAL;
/* Enable downshift on BM (disabled by default) */
- if (phy->type == e1000_phy_bm)
+ if (phy->type == e1000_phy_bm) {
+ /* For 82574/82583, first disable then enable downshift */
+ if (phy->id == BME1000_E_PHY_ID_R2) {
+ phy_data &= ~BME1000_PSCR_ENABLE_DOWNSHIFT;
+ ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL,
+ phy_data);
+ if (ret_val)
+ return ret_val;
+ /* Commit the changes. */
+ ret_val = e1000e_commit_phy(hw);
+ if (ret_val) {
+ e_dbg("Error committing the PHY changes\n");
+ return ret_val;
+ }
+ }
+
phy_data |= BME1000_PSCR_ENABLE_DOWNSHIFT;
+ }
ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
if (ret_val)