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e1000e: i219 - increase IPG for speed 10/100 full duplex 

In SPT/i219, there were CRC errors in speed 10/100 full duplex.
The solution given by the HW team is to increase the IPG from 8 to 0xC

Signed-off-by: Yanir Lubetkin <yanirx.lubetkin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Yanir Lubetkin 2015-06-10 01:15:57 +03:00 committed by Jeff Kirsher
parent 6607c99e70
commit 69cfbc95bd
1 changed files with 7 additions and 3 deletions
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10
drivers/net/ethernet/intel/e1000e/ich8lan.c
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@ -1400,16 +1400,20 @@ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw)
if (((hw->mac.type == e1000_pch2lan) || if (((hw->mac.type == e1000_pch2lan) ||
(hw->mac.type == e1000_pch_lpt) || (hw->mac.type == e1000_pch_lpt) ||
(hw->mac.type == e1000_pch_spt)) && link) { (hw->mac.type == e1000_pch_spt)) && link) {
u32 reg; u16 speed, duplex;
reg = er32(STATUS); e1000e_get_speed_and_duplex_copper(hw, &speed, &duplex);
tipg_reg = er32(TIPG); tipg_reg = er32(TIPG);
tipg_reg &= ~E1000_TIPG_IPGT_MASK; tipg_reg &= ~E1000_TIPG_IPGT_MASK;
if (!(reg & (E1000_STATUS_FD | E1000_STATUS_SPEED_MASK))) { if (duplex == HALF_DUPLEX && speed == SPEED_10) {
tipg_reg |= 0xFF; tipg_reg |= 0xFF;
/* Reduce Rx latency in analog PHY */ /* Reduce Rx latency in analog PHY */
emi_val = 0; emi_val = 0;
} else if (hw->mac.type == e1000_pch_spt &&
duplex == FULL_DUPLEX && speed != SPEED_1000) {
tipg_reg |= 0xC;
emi_val = 1;
} else { } else {
/* Roll back the default values */ /* Roll back the default values */