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net: phy: bcm7xxx: update workaround to fix 100BaseT corner cases 

Update the AFE_TX_CONFIG value to solve marginal rise/fall issues
observed when the link is operating in 100BaseT. This workaround applies
to GPHY revisions D0, E0 and newer.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2015-06-08 11:05:20 -07:00 committed by David S. Miller
parent 6508060232
commit 6da8253bdd
1 changed files with 5 additions and 2 deletions
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7
drivers/net/phy/bcm7xxx.c
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@ -136,8 +136,8 @@ static int bcm7xxx_28nm_d0_afe_config_init(struct phy_device *phydev)
/* AFE_RX_LP_COUNTER, set RX bandwidth to maximum */
phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0);
/* AFE_TX_CONFIG, set 1000BT Cfeed=110 for all ports */
phy_write_misc(phydev, AFE_TX_CONFIG, 0x0061);
/* AFE_TX_CONFIG, set 100BT Cfeed=011 to improve rise/fall time */
phy_write_misc(phydev, AFE_TX_CONFIG, 0x431);
/* AFE_VDCA_ICTRL_0, set Iq=1101 instead of 0111 for AB symmetry */
phy_write_misc(phydev, AFE_VDCA_ICTRL_0, 0xa7da);
@ -167,6 +167,9 @@ static int bcm7xxx_28nm_e0_plus_afe_config_init(struct phy_device *phydev)
/* AFE_RXCONFIG_1, provide more margin for INL/DNL measurement */
phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9b2f);
/* AFE_TX_CONFIG, set 100BT Cfeed=011 to improve rise/fall time */
phy_write_misc(phydev, AFE_TX_CONFIG, 0x431);
/* AFE_VDCA_ICTRL_0, set Iq=1101 instead of 0111 for AB symmetry */
phy_write_misc(phydev, AFE_VDCA_ICTRL_0, 0xa7da);