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tg3: Add AC131 power down support

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The AC131 does not respect the power down bit (bit 11) of the MII
Control Register (reg 0x0).  Instead, software is required to put the
phy into standby power down mode through the shadow register set.  This
patch implements support for the AC131 standby power down mode.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2009-11-02 14:26:38 +00:00 committed by David S. Miller
parent 788a035e60
commit 0e5f784c77
2 changed files with 23 additions and 0 deletions
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20
drivers/net/tg3.c
View file

@ -2149,6 +2149,26 @@ static void tg3_power_down_phy(struct tg3 *tp, bool do_low_power)
tw32_f(GRC_MISC_CFG, val | GRC_MISC_CFG_EPHY_IDDQ);
udelay(40);
return;
} else if (tp->tg3_flags3 & TG3_FLG3_PHY_IS_FET) {
u32 phytest;
if (!tg3_readphy(tp, MII_TG3_FET_TEST, &phytest)) {
u32 phy;
tg3_writephy(tp, MII_ADVERTISE, 0);
tg3_writephy(tp, MII_BMCR,
BMCR_ANENABLE | BMCR_ANRESTART);
tg3_writephy(tp, MII_TG3_FET_TEST,
phytest | MII_TG3_FET_SHADOW_EN);
if (!tg3_readphy(tp, MII_TG3_FET_SHDW_AUXMODE4, &phy)) {
phy |= MII_TG3_FET_SHDW_AUXMODE4_SBPD;
tg3_writephy(tp,
MII_TG3_FET_SHDW_AUXMODE4,
phy);
}
tg3_writephy(tp, MII_TG3_FET_TEST, phytest);
}
return;
} else if (do_low_power) {
tg3_writephy(tp, MII_TG3_EXT_CTRL,
MII_TG3_EXT_CTRL_FORCE_LED_OFF);

3
drivers/net/tg3.h
View file

@ -2080,6 +2080,9 @@
#define MII_TG3_FET_SHDW_MISCCTRL 0x10
#define MII_TG3_FET_SHDW_MISCCTRL_MDIX 0x4000
#define MII_TG3_FET_SHDW_AUXMODE4 0x1a
#define MII_TG3_FET_SHDW_AUXMODE4_SBPD 0x0008
#define MII_TG3_FET_SHDW_AUXSTAT2 0x1b
#define MII_TG3_FET_SHDW_AUXSTAT2_APD 0x0020