asgardius/android_kernel_motorola_sm6225
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

igb: Fix for DH89xxCC near end loopback test

Browse source 
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
Show stats Download patch file Download diff file Expand all files Collapse all files

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);