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igb: Fix for DH89xxCC near end loopback test

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On this chipset it is required to configure the MPHY block for loopback tests. If MPHY is not configured then all loopback tests will report failures.

Signed-off-by: Robert Healy <robert.healy@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:
Robert Healy 2011-07-12 08:46:20 +00:00 committed by Jeff Kirsher
parent 6d9e5130b9
commit a14bc2bb70
2 changed files with 43 additions and 0 deletions
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10
drivers/net/igb/e1000_defines.h
View File

@ -512,6 +512,16 @@
#define E1000_GCR_CMPL_TMOUT_RESEND 0x00010000
#define E1000_GCR_CAP_VER2 0x00040000
/* mPHY Address Control and Data Registers */
#define E1000_MPHY_ADDR_CTL 0x0024 /* mPHY Address Control Register */
#define E1000_MPHY_ADDR_CTL_OFFSET_MASK 0xFFFF0000
#define E1000_MPHY_DATA 0x0E10 /* mPHY Data Register */
/* mPHY PCS CLK Register */
#define E1000_MPHY_PCS_CLK_REG_OFFSET 0x0004 /* mPHY PCS CLK AFE CSR Offset */
/* mPHY Near End Digital Loopback Override Bit */
#define E1000_MPHY_PCS_CLK_REG_DIGINELBEN 0x10
/* PHY Control Register */
#define MII_CR_FULL_DUPLEX 0x0100 /* FDX =1, half duplex =0 */
#define MII_CR_RESTART_AUTO_NEG 0x0200 /* Restart auto negotiation */

33
drivers/net/igb/igb_ethtool.c
View File

@ -1461,6 +1461,22 @@ static int igb_setup_loopback_test(struct igb_adapter *adapter)
/* use CTRL_EXT to identify link type as SGMII can appear as copper */
if (reg & E1000_CTRL_EXT_LINK_MODE_MASK) {
if ((hw->device_id == E1000_DEV_ID_DH89XXCC_SGMII) ||
(hw->device_id == E1000_DEV_ID_DH89XXCC_SERDES) ||
(hw->device_id == E1000_DEV_ID_DH89XXCC_BACKPLANE) ||
(hw->device_id == E1000_DEV_ID_DH89XXCC_SFP)) {
/* Enable DH89xxCC MPHY for near end loopback */
reg = rd32(E1000_MPHY_ADDR_CTL);
reg = (reg & E1000_MPHY_ADDR_CTL_OFFSET_MASK) |
E1000_MPHY_PCS_CLK_REG_OFFSET;
wr32(E1000_MPHY_ADDR_CTL, reg);
reg = rd32(E1000_MPHY_DATA);
reg |= E1000_MPHY_PCS_CLK_REG_DIGINELBEN;
wr32(E1000_MPHY_DATA, reg);
}
reg = rd32(E1000_RCTL);
reg |= E1000_RCTL_LBM_TCVR;
wr32(E1000_RCTL, reg);
@ -1502,6 +1518,23 @@ static void igb_loopback_cleanup(struct igb_adapter *adapter)
u32 rctl;
u16 phy_reg;
if ((hw->device_id == E1000_DEV_ID_DH89XXCC_SGMII) ||
(hw->device_id == E1000_DEV_ID_DH89XXCC_SERDES) ||
(hw->device_id == E1000_DEV_ID_DH89XXCC_BACKPLANE) ||
(hw->device_id == E1000_DEV_ID_DH89XXCC_SFP)) {
u32 reg;
/* Disable near end loopback on DH89xxCC */
reg = rd32(E1000_MPHY_ADDR_CTL);
reg = (reg & E1000_MPHY_ADDR_CTL_OFFSET_MASK) |
E1000_MPHY_PCS_CLK_REG_OFFSET;
wr32(E1000_MPHY_ADDR_CTL, reg);
reg = rd32(E1000_MPHY_DATA);
reg &= ~E1000_MPHY_PCS_CLK_REG_DIGINELBEN;
wr32(E1000_MPHY_DATA, reg);
}
rctl = rd32(E1000_RCTL);
rctl &= ~(E1000_RCTL_LBM_TCVR | E1000_RCTL_LBM_MAC);
wr32(E1000_RCTL, rctl);