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tg3: Skip powering down function 0 on certain serdes devices 

On the 5718, 5719 and 5720 serdes devices, powering down function 0
results in all the other ports being powered down. Add code to skip
function 0 power down.

v2:
 - Modify tg3_phy_power_bug() function to use a switch instead of a
   complicated if statement. Suggested by Joe Perches.

Cc: <stable@vger.kernel.org>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nithin Sujir 2013-05-13 11:04:15 +00:00 committed by David S. Miller
parent dbbffe6898
commit 44f3b503c1
1 changed files with 26 additions and 6 deletions
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32
drivers/net/ethernet/broadcom/tg3.c
View File

@ -2957,6 +2957,31 @@ static int tg3_5700_link_polarity(struct tg3 *tp, u32 speed)
return 0;
}
static bool tg3_phy_power_bug(struct tg3 *tp)
{
switch (tg3_asic_rev(tp)) {
case ASIC_REV_5700:
case ASIC_REV_5704:
return true;
case ASIC_REV_5780:
if (tp->phy_flags & TG3_PHYFLG_MII_SERDES)
return true;
return false;
case ASIC_REV_5717:
if (!tp->pci_fn)
return true;
return false;
case ASIC_REV_5719:
case ASIC_REV_5720:
if ((tp->phy_flags & TG3_PHYFLG_PHY_SERDES) &&
!tp->pci_fn)
return true;
return false;
}
return false;
}
static void tg3_power_down_phy(struct tg3 *tp, bool do_low_power)
{
u32 val;
@ -3016,12 +3041,7 @@ static void tg3_power_down_phy(struct tg3 *tp, bool do_low_power)
/* The PHY should not be powered down on some chips because
* of bugs.
*/
if (tg3_asic_rev(tp) == ASIC_REV_5700 ||
tg3_asic_rev(tp) == ASIC_REV_5704 ||
(tg3_asic_rev(tp) == ASIC_REV_5780 &&
(tp->phy_flags & TG3_PHYFLG_MII_SERDES)) ||
(tg3_asic_rev(tp) == ASIC_REV_5717 &&
!tp->pci_fn))
if (tg3_phy_power_bug(tp))
return;
if (tg3_chip_rev(tp) == CHIPREV_5784_AX ||