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Commit d1ec96af authored by Matt Carlson's avatar Matt Carlson Committed by David S. Miller
Browse files

tg3: Add reliable serdes detection for 5717 A0 



The serdes status bit does not work as intended for the 5717 A0.
This patch implements an alternative detection scheme that will only be
valid for A0 revisions.

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 86cfe4ff

drivers/net/tg3.c

+7 −2
Original line number Diff line number Diff line
@@ -1037,7 +1037,11 @@ static void tg3_mdio_start(struct tg3 *tp) 
		else

			tp->phy_addr = 1;



		if (tp->pci_chip_rev_id != CHIPREV_ID_5717_A0)

			is_serdes = tr32(SG_DIG_STATUS) & SG_DIG_IS_SERDES;

		else

			is_serdes = tr32(TG3_CPMU_PHY_STRAP) &

				    TG3_CPMU_PHY_STRAP_IS_SERDES;

		if (is_serdes)

			tp->phy_addr += 7;

	} else
@@ -12123,7 +12127,8 @@ static void __devinit tg3_get_eeprom_hw_cfg(struct tg3 *tp) 


		tp->phy_id = eeprom_phy_id;

		if (eeprom_phy_serdes) {

			if (tp->tg3_flags2 & TG3_FLG2_5780_CLASS)

			if ((tp->tg3_flags2 & TG3_FLG2_5780_CLASS) ||

			    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717)

				tp->tg3_flags2 |= TG3_FLG2_MII_SERDES;

			else

				tp->tg3_flags2 |= TG3_FLG2_PHY_SERDES;

drivers/net/tg3.h

+2 −0
Original line number Diff line number Diff line
@@ -1054,6 +1054,8 @@ 
#define  CPMU_MUTEX_REQ_DRIVER		 0x00001000

#define TG3_CPMU_MUTEX_GNT		0x00003660

#define  CPMU_MUTEX_GNT_DRIVER		 0x00001000

#define TG3_CPMU_PHY_STRAP		0x00003664

#define TG3_CPMU_PHY_STRAP_IS_SERDES	 0x00000020

/* 0x3664 --> 0x3800 unused */



/* Mbuf cluster free registers */