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author | Eilon Greenstein <eilong@broadcom.com> | 2009-02-12 08:37:14 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2009-02-16 07:31:41 (GMT) |
commit | c2c8b03e200bdda3ba23d27f5c33bac784dced01 (patch) | |
tree | c15811bb47f3790e106660e5919cb690f288f3af /drivers/net/bnx2x_link.c | |
parent | ed8680a7e68fc07d6b2bfa977e8f5f3d3c568d14 (diff) | |
download | linux-c2c8b03e200bdda3ba23d27f5c33bac784dced01.tar.xz |
bnx2x: Pre emphasis configuration
Supporting non-default pre-emphasis settings for the internal and some external
PHYs
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bnx2x_link.c')
-rw-r--r-- | drivers/net/bnx2x_link.c | 130 |
1 files changed, 98 insertions, 32 deletions
diff --git a/drivers/net/bnx2x_link.c b/drivers/net/bnx2x_link.c index b61a7a2..4a594b8 100644 --- a/drivers/net/bnx2x_link.c +++ b/drivers/net/bnx2x_link.c @@ -1758,33 +1758,39 @@ static void bnx2x_set_gmii_tx_driver(struct link_params *params) struct bnx2x *bp = params->bp; u16 lp_up2; u16 tx_driver; + u16 bank; /* read precomp */ - CL45_RD_OVER_CL22(bp, params->port, params->phy_addr, MDIO_REG_BANK_OVER_1G, MDIO_OVER_1G_LP_UP2, &lp_up2); - CL45_RD_OVER_CL22(bp, params->port, - params->phy_addr, - MDIO_REG_BANK_TX0, - MDIO_TX0_TX_DRIVER, &tx_driver); - /* bits [10:7] at lp_up2, positioned at [15:12] */ lp_up2 = (((lp_up2 & MDIO_OVER_1G_LP_UP2_PREEMPHASIS_MASK) >> MDIO_OVER_1G_LP_UP2_PREEMPHASIS_SHIFT) << MDIO_TX0_TX_DRIVER_PREEMPHASIS_SHIFT); - if ((lp_up2 != 0) && - (lp_up2 != (tx_driver & MDIO_TX0_TX_DRIVER_PREEMPHASIS_MASK))) { - /* replace tx_driver bits [15:12] */ - tx_driver &= ~MDIO_TX0_TX_DRIVER_PREEMPHASIS_MASK; - tx_driver |= lp_up2; - CL45_WR_OVER_CL22(bp, params->port, + if (lp_up2 == 0) + return; + + for (bank = MDIO_REG_BANK_TX0; bank <= MDIO_REG_BANK_TX3; + bank += (MDIO_REG_BANK_TX1 - MDIO_REG_BANK_TX0)) { + CL45_RD_OVER_CL22(bp, params->port, params->phy_addr, - MDIO_REG_BANK_TX0, - MDIO_TX0_TX_DRIVER, tx_driver); + bank, + MDIO_TX0_TX_DRIVER, &tx_driver); + + /* replace tx_driver bits [15:12] */ + if (lp_up2 != + (tx_driver & MDIO_TX0_TX_DRIVER_PREEMPHASIS_MASK)) { + tx_driver &= ~MDIO_TX0_TX_DRIVER_PREEMPHASIS_MASK; + tx_driver |= lp_up2; + CL45_WR_OVER_CL22(bp, params->port, + params->phy_addr, + bank, + MDIO_TX0_TX_DRIVER, tx_driver); + } } } @@ -2890,31 +2896,40 @@ static void bnx2x_ext_phy_set_pause(struct link_params *params, MDIO_AN_DEVAD, MDIO_AN_REG_ADV_PAUSE, val); } +static void bnx2x_set_preemphasis(struct link_params *params) +{ + u16 bank, i = 0; + struct bnx2x *bp = params->bp; + for (bank = MDIO_REG_BANK_RX0, i = 0; bank <= MDIO_REG_BANK_RX3; + bank += (MDIO_REG_BANK_RX1-MDIO_REG_BANK_RX0), i++) { + CL45_WR_OVER_CL22(bp, params->port, + params->phy_addr, + bank, + MDIO_RX0_RX_EQ_BOOST, + params->xgxs_config_rx[i]); + } + + for (bank = MDIO_REG_BANK_TX0, i = 0; bank <= MDIO_REG_BANK_TX3; + bank += (MDIO_REG_BANK_TX1 - MDIO_REG_BANK_TX0), i++) { + CL45_WR_OVER_CL22(bp, params->port, + params->phy_addr, + bank, + MDIO_TX0_TX_DRIVER, + params->xgxs_config_tx[i]); + } +} static void bnx2x_init_internal_phy(struct link_params *params, struct link_vars *vars) { struct bnx2x *bp = params->bp; - u8 port = params->port; if (!(vars->phy_flags & PHY_SGMII_FLAG)) { - u16 bank, rx_eq; - - rx_eq = ((params->serdes_config & - PORT_HW_CFG_SERDES_RX_DRV_EQUALIZER_MASK) >> - PORT_HW_CFG_SERDES_RX_DRV_EQUALIZER_SHIFT); - - DP(NETIF_MSG_LINK, "setting rx eq to 0x%x\n", rx_eq); - for (bank = MDIO_REG_BANK_RX0; bank <= MDIO_REG_BANK_RX_ALL; - bank += (MDIO_REG_BANK_RX1-MDIO_REG_BANK_RX0)) { - CL45_WR_OVER_CL22(bp, port, - params->phy_addr, - bank , - MDIO_RX0_RX_EQ_BOOST, - ((rx_eq & - MDIO_RX0_RX_EQ_BOOST_EQUALIZER_CTRL_MASK) | - MDIO_RX0_RX_EQ_BOOST_OFFSET_CTRL)); - } + if ((XGXS_EXT_PHY_TYPE(params->ext_phy_config) == + PORT_HW_CFG_XGXS_EXT_PHY_TYPE_DIRECT) && + (params->feature_config_flags & + FEATURE_CONFIG_OVERRIDE_PREEMPHASIS_ENABLED)) + bnx2x_set_preemphasis(params); /* forced speed requested? */ if (vars->line_speed != SPEED_AUTO_NEG) { @@ -3038,6 +3053,35 @@ static u8 bnx2x_ext_phy_init(struct link_params *params, struct link_vars *vars) } DP(NETIF_MSG_LINK, "XGXS 8706 is initialized " "after %d ms\n", cnt); + if ((params->feature_config_flags & + FEATURE_CONFIG_OVERRIDE_PREEMPHASIS_ENABLED)) { + u8 i; + u16 reg; + for (i = 0; i < 4; i++) { + reg = MDIO_XS_8706_REG_BANK_RX0 + + i*(MDIO_XS_8706_REG_BANK_RX1 - + MDIO_XS_8706_REG_BANK_RX0); + bnx2x_cl45_read(bp, params->port, + ext_phy_type, + ext_phy_addr, + MDIO_XS_DEVAD, + reg, &val); + /* Clear first 3 bits of the control */ + val &= ~0x7; + /* Set control bits according to + configuation */ + val |= (params->xgxs_config_rx[i] & + 0x7); + DP(NETIF_MSG_LINK, "Setting RX" + "Equalizer to BCM8706 reg 0x%x" + " <-- val 0x%x\n", reg, val); + bnx2x_cl45_write(bp, params->port, + ext_phy_type, + ext_phy_addr, + MDIO_XS_DEVAD, + reg, val); + } + } /* Force speed */ /* First enable LASI */ bnx2x_cl45_write(bp, params->port, @@ -3170,6 +3214,28 @@ static u8 bnx2x_ext_phy_init(struct link_params *params, struct link_vars *vars) ext_phy_addr, MDIO_PMA_DEVAD, MDIO_PMA_REG_LASI_CTRL, 1); } + + /* Set TX PreEmphasis if needed */ + if ((params->feature_config_flags & + FEATURE_CONFIG_OVERRIDE_PREEMPHASIS_ENABLED)) { + DP(NETIF_MSG_LINK, "Setting TX_CTRL1 0x%x," + "TX_CTRL2 0x%x\n", + params->xgxs_config_tx[0], + params->xgxs_config_tx[1]); + bnx2x_cl45_write(bp, params->port, + ext_phy_type, + ext_phy_addr, + MDIO_PMA_DEVAD, + MDIO_PMA_REG_8726_TX_CTRL1, + params->xgxs_config_tx[0]); + + bnx2x_cl45_write(bp, params->port, + ext_phy_type, + ext_phy_addr, + MDIO_PMA_DEVAD, + MDIO_PMA_REG_8726_TX_CTRL2, + params->xgxs_config_tx[1]); + } break; case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8072: case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8073: |