e1000e: extend EEE LPI timer to prevent dropped link
The link can be unexpectedly dropped when the timer for entering EEE low- power-idle quiet state expires too soon. The timer needs to be extended from 196usec to 200usec after every LCD (PHY) reset to prevent this from happening. Signed-off-by: Bruce Allan <bruce.w.allan@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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5661aeb08e
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1 changed files with 24 additions and 5 deletions
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@ -140,6 +140,11 @@
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#define I82579_LPI_CTRL PHY_REG(772, 20)
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#define I82579_LPI_CTRL_ENABLE_MASK 0x6000
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/* EMI Registers */
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#define I82579_EMI_ADDR 0x10
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#define I82579_EMI_DATA 0x11
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#define I82579_LPI_UPDATE_TIMER 0x4805 /* in 40ns units + 40 ns base value */
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/* Strapping Option Register - RO */
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#define E1000_STRAP 0x0000C
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#define E1000_STRAP_SMBUS_ADDRESS_MASK 0x00FE0000
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@ -1723,11 +1728,25 @@ static s32 e1000_post_phy_reset_ich8lan(struct e1000_hw *hw)
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/* Configure the LCD with the OEM bits in NVM */
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ret_val = e1000_oem_bits_config_ich8lan(hw, true);
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/* Ungate automatic PHY configuration on non-managed 82579 */
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if ((hw->mac.type == e1000_pch2lan) &&
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!(er32(FWSM) & E1000_ICH_FWSM_FW_VALID)) {
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msleep(10);
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e1000_gate_hw_phy_config_ich8lan(hw, false);
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if (hw->mac.type == e1000_pch2lan) {
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/* Ungate automatic PHY configuration on non-managed 82579 */
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if (!(er32(FWSM) & E1000_ICH_FWSM_FW_VALID)) {
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msleep(10);
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e1000_gate_hw_phy_config_ich8lan(hw, false);
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}
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/* Set EEE LPI Update Timer to 200usec */
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ret_val = hw->phy.ops.acquire(hw);
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if (ret_val)
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goto out;
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ret_val = hw->phy.ops.write_reg_locked(hw, I82579_EMI_ADDR,
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I82579_LPI_UPDATE_TIMER);
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if (ret_val)
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goto release;
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ret_val = hw->phy.ops.write_reg_locked(hw, I82579_EMI_DATA,
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0x1387);
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release:
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hw->phy.ops.release(hw);
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}
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out:
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