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e1000e: Disable Far-End LoopBack following reset on 80003ES2LAN.

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80003ES2LAN has an errata such that far-end loopback may be activated by
bit errors producing a reserved symbol. In order to disable far-end
loopback quickly enough, disable it immediately following a reset.

Signed-off-by: Matthew Vick <matthew.vick@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Matthew Vick 2012-03-16 09:02:58 +00:00 committed by Jeff Kirsher
parent 8298193012
commit 1c1093a44f
1 changed files with 8 additions and 0 deletions
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8
drivers/net/ethernet/intel/e1000e/80003es2lan.c
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@ -764,6 +764,7 @@ static s32 e1000_reset_hw_80003es2lan(struct e1000_hw *hw)
{
u32 ctrl;
s32 ret_val;
u16 kum_reg_data;
/*
* Prevent the PCI-E bus from sticking if there is no TLP connection
@ -789,6 +790,13 @@ static s32 e1000_reset_hw_80003es2lan(struct e1000_hw *hw)
ew32(CTRL, ctrl | E1000_CTRL_RST);
e1000_release_phy_80003es2lan(hw);
/* Disable IBIST slave mode (far-end loopback) */
e1000_read_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,
&kum_reg_data);
kum_reg_data |= E1000_KMRNCTRLSTA_IBIST_DISABLE;
e1000_write_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,
kum_reg_data);
ret_val = e1000e_get_auto_rd_done(hw);
if (ret_val)
/* We don't want to continue accessing MAC registers. */