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Commit 039a7b85 authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller
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net: phy: bcm7xxx: Implement EGPHY workaround for 7278 



Implement the HW design team recommended workaround in for 7278. Since
the GPHY now returns its revision information in MII_PHYS_ID[23] we need
to check whether the revision provided in flags is 0 or not.

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 582d0ac3

drivers/net/phy/bcm7xxx.c

+34 −0
Original line number Diff line number Diff line
@@ -167,6 +167,31 @@ static int bcm7xxx_28nm_e0_plus_afe_config_init(struct phy_device *phydev) 
	return 0;

}



static int bcm7xxx_28nm_a0_patch_afe_config_init(struct phy_device *phydev)

{

	/* +1 RC_CAL codes for RL centering for both LT and HT conditions */

	bcm_phy_write_misc(phydev, AFE_RXCONFIG_2, 0xd003);



	/* Cut master bias current by 2% to compensate for RC_CAL offset */

	bcm_phy_write_misc(phydev, DSP_TAP10, 0x791b);



	/* Improve hybrid leakage */

	bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x10e3);



	/* Change rx_on_tune 8 to 0xf */

	bcm_phy_write_misc(phydev, 0x21, 0x2, 0x87f6);



	/* Change 100Tx EEE bandwidth */

	bcm_phy_write_misc(phydev, 0x22, 0x2, 0x017d);



	/* Enable ffe zero detection for Vitesse interoperability */

	bcm_phy_write_misc(phydev, 0x26, 0x2, 0x0015);



	r_rc_cal_reset(phydev);



	return 0;

}



static int bcm7xxx_28nm_config_init(struct phy_device *phydev)

{

	u8 rev = PHY_BRCM_7XXX_REV(phydev->dev_flags);
@@ -174,6 +199,12 @@ static int bcm7xxx_28nm_config_init(struct phy_device *phydev) 
	u8 count;

	int ret = 0;



	/* Newer devices have moved the revision information back into a

	 * standard location in MII_PHYS_ID[23]

	 */

	if (rev == 0)

		rev = phydev->phy_id & ~phydev->drv->phy_id_mask;



	pr_info_once("%s: %s PHY revision: 0x%02x, patch: %d\n",

		     phydev_name(phydev), phydev->drv->name, rev, patch);
@@ -197,6 +228,9 @@ static int bcm7xxx_28nm_config_init(struct phy_device *phydev) 
	case 0x10:

		ret = bcm7xxx_28nm_e0_plus_afe_config_init(phydev);

		break;

	case 0x01:

		ret = bcm7xxx_28nm_a0_patch_afe_config_init(phydev);

		break;

	default:

		break;

	}