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bnx2x: Fix link for KR with swapped polarity lane 

This avoids clearing the RX polarity setting in KR mode when polarity lane
is swapped, as otherwise this will result in failed link.

Signed-off-by: Yaniv Rosner <yaniv.rosner@qlogic.com>
Signed-off-by: Yuval Mintz <yuval.mintz@qlogic.com>
Signed-off-by: Ariel Elior <ariel.elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yaniv Rosner 2014-06-12 07:55:29 +03:00 committed by David S. Miller
parent d3217b15a1
commit dad91ee478
1 changed files with 19 additions and 6 deletions
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25
drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c
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@ -3702,7 +3702,8 @@ static void bnx2x_warpcore_restart_AN_KR(struct bnx2x_phy *phy,
static void bnx2x_warpcore_enable_AN_KR(struct bnx2x_phy *phy,
struct link_params *params,
struct link_vars *vars) {
u16 lane, i, cl72_ctrl, an_adv = 0;
u16 lane, i, cl72_ctrl, an_adv = 0, val;
u32 wc_lane_config;
struct bnx2x *bp = params->bp;
static struct bnx2x_reg_set reg_set[] = {
{MDIO_WC_DEVAD, MDIO_WC_REG_SERDESDIGITAL_CONTROL1000X2, 0x7},
@ -3821,15 +3822,27 @@ static void bnx2x_warpcore_enable_AN_KR(struct bnx2x_phy *phy,
/* Enable Auto-Detect to support 1G over CL37 as well */
bnx2x_cl45_write(bp, phy, MDIO_WC_DEVAD,
MDIO_WC_REG_SERDESDIGITAL_CONTROL1000X1, 0x10);
wc_lane_config = REG_RD(bp, params->shmem_base +
offsetof(struct shmem_region, dev_info.
shared_hw_config.wc_lane_config));
bnx2x_cl45_read(bp, phy, MDIO_WC_DEVAD,
MDIO_WC_REG_RX0_PCI_CTRL + (lane << 4), &val);
/* Force cl48 sync_status LOW to avoid getting stuck in CL73
* parallel-detect loop when CL73 and CL37 are enabled.
*/
CL22_WR_OVER_CL45(bp, phy, MDIO_REG_BANK_AER_BLOCK,
MDIO_AER_BLOCK_AER_REG, 0);
val |= 1 << 11;
/* Restore Polarity settings in case it was run over by
* previous link owner
*/
if (wc_lane_config &
(SHARED_HW_CFG_RX_LANE0_POL_FLIP_ENABLED << lane))
val |= 3 << 2;
else
val &= ~(3 << 2);
bnx2x_cl45_write(bp, phy, MDIO_WC_DEVAD,
MDIO_WC_REG_RXB_ANA_RX_CONTROL_PCI, 0x0800);
bnx2x_set_aer_mmd(params, phy);
MDIO_WC_REG_RX0_PCI_CTRL + (lane << 4),
val);
bnx2x_disable_kr2(params, vars, phy);
}