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e1000e: fix legacy interrupt handling in i219

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This fix handles a hardware issue that prevented i219 from
working in legacy interrupts mode (IntMode=0)

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
2015-06-02 17:05:42 +03:00
committed by Jeff Kirsher
parent ff9174291e
commit ec945cfbbf
3 changed files with 19 additions and 1 deletions
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14
drivers/net/ethernet/intel/e1000e/netdev.c
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@@ -4120,6 +4120,20 @@ void e1000e_reset(struct e1000_adapter *adapter)
phy_data &= ~IGP02E1000_PM_SPD;
e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
}
if (hw->mac.type == e1000_pch_spt && adapter->int_mode == 0) {
u32 reg;
/* Fextnvm7 @ 0xe4[2] = 1 */
reg = er32(FEXTNVM7);
reg |= E1000_FEXTNVM7_SIDE_CLK_UNGATE;
ew32(FEXTNVM7, reg);
/* Fextnvm9 @ 0x5bb4[13:12] = 11 */
reg = er32(FEXTNVM9);
reg |= E1000_FEXTNVM9_IOSFSB_CLKGATE_DIS |
E1000_FEXTNVM9_IOSFSB_CLKREQ_DIS;
ew32(FEXTNVM9, reg);
}
}
int e1000e_up(struct e1000_adapter *adapter)