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igb: restore EEPROM values of MDICNFG on reset with 82580 

On a reset the MDICNFG.Destination and MDICNFG.COM_MDIO
register fields are not restored to the EEPROM default.
This patch modifies the reset code to read the EEPROM
and restore the default values.

Signed-off-by: Nicholas Nunley <nicholas.d.nunley@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nick Nunley 2010-07-26 13:15:29 +00:00 committed by David S. Miller
parent 4085f746db
commit 08451e2587
2 changed files with 45 additions and 0 deletions
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41
drivers/net/igb/e1000_82575.c
View File

@ -1548,6 +1548,43 @@ out:
return ret_val;
}
/**
* igb_reset_mdicnfg_82580 - Reset MDICNFG destination and com_mdio bits
* @hw: pointer to the HW structure
*
* This resets the the MDICNFG.Destination and MDICNFG.Com_MDIO bits based on
* the values found in the EEPROM. This addresses an issue in which these
* bits are not restored from EEPROM after reset.
**/
static s32 igb_reset_mdicnfg_82580(struct e1000_hw *hw)
{
s32 ret_val = 0;
u32 mdicnfg;
u16 nvm_data;
if (hw->mac.type != e1000_82580)
goto out;
if (!igb_sgmii_active_82575(hw))
goto out;
ret_val = hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A +
NVM_82580_LAN_FUNC_OFFSET(hw->bus.func), 1,
&nvm_data);
if (ret_val) {
hw_dbg("NVM Read Error\n");
goto out;
}
mdicnfg = rd32(E1000_MDICNFG);
if (nvm_data & NVM_WORD24_EXT_MDIO)
mdicnfg |= E1000_MDICNFG_EXT_MDIO;
if (nvm_data & NVM_WORD24_COM_MDIO)
mdicnfg |= E1000_MDICNFG_COM_MDIO;
wr32(E1000_MDICNFG, mdicnfg);
out:
return ret_val;
}
/**
* igb_reset_hw_82580 - Reset hardware
* @hw: pointer to the HW structure
@ -1623,6 +1660,10 @@ static s32 igb_reset_hw_82580(struct e1000_hw *hw)
wr32(E1000_IMC, 0xffffffff);
icr = rd32(E1000_ICR);
ret_val = igb_reset_mdicnfg_82580(hw);
if (ret_val)
hw_dbg("Could not reset MDICNFG based on EEPROM\n");
/* Install any alternate MAC address into RAR0 */
ret_val = igb_check_alt_mac_addr(hw);

4
drivers/net/igb/e1000_defines.h
View File

@ -570,6 +570,10 @@
#define NVM_82580_LAN_FUNC_OFFSET(a) (a ? (0x40 + (0x40 * a)) : 0)
/* Mask bits for fields in Word 0x24 of the NVM */
#define NVM_WORD24_COM_MDIO 0x0008 /* MDIO interface shared */
#define NVM_WORD24_EXT_MDIO 0x0004 /* MDIO accesses routed external */
/* Mask bits for fields in Word 0x0f of the NVM */
#define NVM_WORD0F_PAUSE_MASK 0x3000
#define NVM_WORD0F_ASM_DIR 0x2000