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tg3: Reset the phy to allow modified EEE settings to take effect

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When LFA is enabled, we don't reset the phy. But EEE settings changes
don't take effect until the phy is reset. Add a phy reset when we detect
a changed EEE setting.

Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nithin Sujir 2013-04-09 08:48:09 +00:00 committed by David S. Miller
parent fdad8de467
commit ed1ff5c397
1 changed files with 38 additions and 0 deletions
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38
drivers/net/ethernet/broadcom/tg3.c
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@ -4491,6 +4491,32 @@ static int tg3_init_5401phy_dsp(struct tg3 *tp)
return err;
}
static bool tg3_phy_eee_config_ok(struct tg3 *tp)
{
u32 val;
u32 tgtadv = 0;
u32 advertising = tp->link_config.advertising;
if (!(tp->phy_flags & TG3_PHYFLG_EEE_CAP))
return true;
if (tg3_phy_cl45_read(tp, MDIO_MMD_AN, MDIO_AN_EEE_ADV, &val))
return false;
val &= (MDIO_AN_EEE_ADV_100TX | MDIO_AN_EEE_ADV_1000T);
if (advertising & ADVERTISED_100baseT_Full)
tgtadv |= MDIO_AN_EEE_ADV_100TX;
if (advertising & ADVERTISED_1000baseT_Full)
tgtadv |= MDIO_AN_EEE_ADV_1000T;
if (val != tgtadv)
return false;
return true;
}
static bool tg3_phy_copper_an_config_ok(struct tg3 *tp, u32 *lcladv)
{
u32 advmsk, tgtadv, advertising;
@ -4739,10 +4765,22 @@ static int tg3_setup_copper_phy(struct tg3 *tp, int force_reset)
tp->link_config.active_duplex = current_duplex;
if (tp->link_config.autoneg == AUTONEG_ENABLE) {
bool eee_config_ok = tg3_phy_eee_config_ok(tp);
if ((bmcr & BMCR_ANENABLE) &&
eee_config_ok &&
tg3_phy_copper_an_config_ok(tp, &lcl_adv) &&
tg3_phy_copper_fetch_rmtadv(tp, &rmt_adv))
current_link_up = 1;
/* EEE settings changes take effect only after a phy
* reset. If we have skipped a reset due to Link Flap
* Avoidance being enabled, do it now.
*/
if (!eee_config_ok &&
(tp->phy_flags & TG3_PHYFLG_KEEP_LINK_ON_PWRDN) &&
!force_reset)
tg3_phy_reset(tp);
} else {
if (!(bmcr & BMCR_ANENABLE) &&
tp->link_config.speed == current_speed &&