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Commit 0e5f784c authored by Matt Carlson's avatar Matt Carlson Committed by David S. Miller
Browse files

tg3: Add AC131 power down support 



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: default avatarMatt Carlson <mcarlson@broadcom.com>
Reviewed-by: default avatarMichael Chan <mchan@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 788a035e

drivers/net/tg3.c

+20 −0
Original line number Diff line number Diff line
@@ -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);

drivers/net/tg3.h

+3 −0
Original line number Diff line number Diff line
@@ -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