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e1000e: only perform ESB2 MDIC workaround on certain configurations

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A workaround added for all ESB2 devices (adds a delay for all MDIC accesses
which resolves an issue with the MDIC ready bit being set prematurely) is
applicable only to devices in which the MAC-PHY interconnect is not
operating in a certain mode with in-band MDIO.  Check the control register
for the operating mode and enable the workaround accordingly.

Signed-off-by: Bruce Allan <bruce.w.allan@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:
Bruce Allan 2009-12-08 07:28:20 +00:00 committed by David S. Miller
parent 0781895067
commit 3421eecdee
2 changed files with 71 additions and 35 deletions
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101
drivers/net/e1000e/es2lan.c
View File

@ -46,6 +46,9 @@
#define E1000_KMRNCTRLSTA_HD_CTRL_1000_DEFAULT 0x0000
#define E1000_KMRNCTRLSTA_OPMODE_E_IDLE 0x2000
#define E1000_KMRNCTRLSTA_OPMODE_MASK 0x000C
#define E1000_KMRNCTRLSTA_OPMODE_INBAND_MDIO 0x0004
#define E1000_TCTL_EXT_GCEX_MASK 0x000FFC00 /* Gigabit Carry Extend Padding */
#define DEFAULT_TCTL_EXT_GCEX_80003ES2LAN 0x00010000
@ -462,28 +465,36 @@ static s32 e1000_read_phy_reg_gg82563_80003es2lan(struct e1000_hw *hw,
return ret_val;
}
/*
* The "ready" bit in the MDIC register may be incorrectly set
* before the device has completed the "Page Select" MDI
* transaction. So we wait 200us after each MDI command...
*/
udelay(200);
if (hw->dev_spec.e80003es2lan.mdic_wa_enable == true) {
/*
* The "ready" bit in the MDIC register may be incorrectly set
* before the device has completed the "Page Select" MDI
* transaction. So we wait 200us after each MDI command...
*/
udelay(200);
/* ...and verify the command was successful. */
ret_val = e1000e_read_phy_reg_mdic(hw, page_select, &temp);
/* ...and verify the command was successful. */
ret_val = e1000e_read_phy_reg_mdic(hw, page_select, &temp);
if (((u16)offset >> GG82563_PAGE_SHIFT) != temp) {
ret_val = -E1000_ERR_PHY;
e1000_release_phy_80003es2lan(hw);
return ret_val;
if (((u16)offset >> GG82563_PAGE_SHIFT) != temp) {
ret_val = -E1000_ERR_PHY;
e1000_release_phy_80003es2lan(hw);
return ret_val;
}
udelay(200);
ret_val = e1000e_read_phy_reg_mdic(hw,
MAX_PHY_REG_ADDRESS & offset,
data);
udelay(200);
} else {
ret_val = e1000e_read_phy_reg_mdic(hw,
MAX_PHY_REG_ADDRESS & offset,
data);
}
udelay(200);
ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
data);
udelay(200);
e1000_release_phy_80003es2lan(hw);
return ret_val;
@ -526,28 +537,35 @@ static s32 e1000_write_phy_reg_gg82563_80003es2lan(struct e1000_hw *hw,
return ret_val;
}
if (hw->dev_spec.e80003es2lan.mdic_wa_enable == true) {
/*
* The "ready" bit in the MDIC register may be incorrectly set
* before the device has completed the "Page Select" MDI
* transaction. So we wait 200us after each MDI command...
*/
udelay(200);
/*
* The "ready" bit in the MDIC register may be incorrectly set
* before the device has completed the "Page Select" MDI
* transaction. So we wait 200us after each MDI command...
*/
udelay(200);
/* ...and verify the command was successful. */
ret_val = e1000e_read_phy_reg_mdic(hw, page_select, &temp);
/* ...and verify the command was successful. */
ret_val = e1000e_read_phy_reg_mdic(hw, page_select, &temp);
if (((u16)offset >> GG82563_PAGE_SHIFT) != temp) {
e1000_release_phy_80003es2lan(hw);
return -E1000_ERR_PHY;
}
if (((u16)offset >> GG82563_PAGE_SHIFT) != temp) {
e1000_release_phy_80003es2lan(hw);
return -E1000_ERR_PHY;
udelay(200);
ret_val = e1000e_write_phy_reg_mdic(hw,
MAX_PHY_REG_ADDRESS & offset,
data);
udelay(200);
} else {
ret_val = e1000e_write_phy_reg_mdic(hw,
MAX_PHY_REG_ADDRESS & offset,
data);
}
udelay(200);
ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
data);
udelay(200);
e1000_release_phy_80003es2lan(hw);
return ret_val;
@ -866,6 +884,19 @@ static s32 e1000_init_hw_80003es2lan(struct e1000_hw *hw)
reg_data &= ~0x00100000;
E1000_WRITE_REG_ARRAY(hw, E1000_FFLT, 0x0001, reg_data);
/* default to true to enable the MDIC W/A */
hw->dev_spec.e80003es2lan.mdic_wa_enable = true;
ret_val = e1000_read_kmrn_reg_80003es2lan(hw,
E1000_KMRNCTRLSTA_OFFSET >>
E1000_KMRNCTRLSTA_OFFSET_SHIFT,
&i);
if (!ret_val) {
if ((i & E1000_KMRNCTRLSTA_OPMODE_MASK) ==
E1000_KMRNCTRLSTA_OPMODE_INBAND_MDIO)
hw->dev_spec.e80003es2lan.mdic_wa_enable = false;
}
/*
* Clear all of the statistics registers (clear on read). It is
* important that we do this after we have tried to establish link

5
drivers/net/e1000e/hw.h
View File

@ -900,6 +900,10 @@ struct e1000_dev_spec_82571 {
u32 smb_counter;
};
struct e1000_dev_spec_80003es2lan {
bool mdic_wa_enable;
};
struct e1000_shadow_ram {
u16 value;
bool modified;
@ -928,6 +932,7 @@ struct e1000_hw {
union {
struct e1000_dev_spec_82571 e82571;
struct e1000_dev_spec_80003es2lan e80003es2lan;
struct e1000_dev_spec_ich8lan ich8lan;
} dev_spec;
};