kernel: fix BCM54612E PHY support

This backports upstream commit 62e13097c46c ("net: phy: broadcom: rehook
BCM54612E specific init")

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 87 insertions, 4 deletions

diff --git a/target/linux/generic/patches-4.4/078-0004-net-phy-pick-Broadcom-drivers-updates-from-net-next-.patch b/target/linux/generic/patches-4.4/078-0004-net-phy-pick-Broadcom-drivers-updates-from-net-next-.patch
index 87d6c50..d050691 100644
--- a/target/linux/generic/patches-4.4/078-0004-net-phy-pick-Broadcom-drivers-updates-from-net-next-.patch
+++ b/target/linux/generic/patches-4.4/078-0004-net-phy-pick-Broadcom-drivers-updates-from-net-next-.patch
@@ -1,6 +1,6 @@
 --- a/drivers/net/phy/broadcom.c
 +++ b/drivers/net/phy/broadcom.c
-@@ -30,6 +30,22 @@ MODULE_DESCRIPTION("Broadcom PHY driver"
+@@ -30,6 +30,50 @@ MODULE_DESCRIPTION("Broadcom PHY driver"
  MODULE_AUTHOR("Maciej W. Rozycki");
  MODULE_LICENSE("GPL");
  
@@ -20,10 +20,38 @@
 +	return 0;
 +}
 +
++static int bcm54612e_config_init(struct phy_device *phydev)
++{
++	/* Clear TX internal delay unless requested. */
++	if ((phydev->interface != PHY_INTERFACE_MODE_RGMII_ID) &&
++	    (phydev->interface != PHY_INTERFACE_MODE_RGMII_TXID)) {
++		/* Disable TXD to GTXCLK clock delay (default set) */
++		/* Bit 9 is the only field in shadow register 00011 */
++		bcm_phy_write_shadow(phydev, 0x03, 0);
++	}
++
++	/* Clear RX internal delay unless requested. */
++	if ((phydev->interface != PHY_INTERFACE_MODE_RGMII_ID) &&
++	    (phydev->interface != PHY_INTERFACE_MODE_RGMII_RXID)) {
++		u16 reg;
++
++		reg = bcm54xx_auxctl_read(phydev,
++					  MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
++		/* Disable RXD to RXC delay (default set) */
++		reg &= ~MII_BCM54XX_AUXCTL_SHDWSEL_MISC_RGMII_SKEW_EN;
++		/* Clear shadow selector field */
++		reg &= ~MII_BCM54XX_AUXCTL_SHDWSEL_MASK;
++		bcm54xx_auxctl_write(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC,
++				     MII_BCM54XX_AUXCTL_MISC_WREN | reg);
++	}
++
++	return 0;
++}
++
  static int bcm54810_config(struct phy_device *phydev)
  {
  	int rc, val;
-@@ -230,7 +246,11 @@ static int bcm54xx_config_init(struct ph
+@@ -230,7 +274,15 @@ static int bcm54xx_config_init(struct ph
  	    (phydev->dev_flags & PHY_BRCM_AUTO_PWRDWN_ENABLE))
  		bcm54xx_adjust_rxrefclk(phydev);
  
@@ -32,11 +60,57 @@
 +		err = bcm54210e_config_init(phydev);
 +		if (err)
 +			return err;
++	} else if (BRCM_PHY_MODEL(phydev) == PHY_ID_BCM54612E) {
++		err = bcm54612e_config_init(phydev);
++		if (err)
++			return err;
 +	} else if (BRCM_PHY_MODEL(phydev) == PHY_ID_BCM54810) {
  		err = bcm54810_config(phydev);
  		if (err)
  			return err;
-@@ -548,6 +568,19 @@ static struct phy_driver broadcom_driver
+@@ -375,41 +427,6 @@ static int bcm5481_config_aneg(struct ph
+ 	return ret;
+ }
+ 
+-static int bcm54612e_config_aneg(struct phy_device *phydev)
+-{
+-	int ret;
+-
+-	/* First, auto-negotiate. */
+-	ret = genphy_config_aneg(phydev);
+-
+-	/* Clear TX internal delay unless requested. */
+-	if ((phydev->interface != PHY_INTERFACE_MODE_RGMII_ID) &&
+-	    (phydev->interface != PHY_INTERFACE_MODE_RGMII_TXID)) {
+-		/* Disable TXD to GTXCLK clock delay (default set) */
+-		/* Bit 9 is the only field in shadow register 00011 */
+-		bcm_phy_write_shadow(phydev, 0x03, 0);
+-	}
+-
+-	/* Clear RX internal delay unless requested. */
+-	if ((phydev->interface != PHY_INTERFACE_MODE_RGMII_ID) &&
+-	    (phydev->interface != PHY_INTERFACE_MODE_RGMII_RXID)) {
+-		u16 reg;
+-
+-		/* Errata: reads require filling in the write selector field */
+-		bcm54xx_auxctl_write(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC,
+-				     MII_BCM54XX_AUXCTL_MISC_RDSEL_MISC);
+-		reg = phy_read(phydev, MII_BCM54XX_AUX_CTL);
+-		/* Disable RXD to RXC delay (default set) */
+-		reg &= ~MII_BCM54XX_AUXCTL_MISC_RXD_RXC_SKEW;
+-		/* Clear shadow selector field */
+-		reg &= ~MII_BCM54XX_AUXCTL_SHDWSEL_MASK;
+-		bcm54xx_auxctl_write(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC,
+-				     MII_BCM54XX_AUXCTL_MISC_WREN | reg);
+-	}
+-
+-	return ret;
+-}
+-
+ static int brcm_phy_setbits(struct phy_device *phydev, int reg, int set)
+ {
+ 	int val;
+@@ -548,6 +565,19 @@ static struct phy_driver broadcom_driver
  	.config_intr	= bcm_phy_config_intr,
  	.driver		= { .owner = THIS_MODULE },
  }, {
@@ -56,7 +130,16 @@
  	.phy_id		= PHY_ID_BCM5461,
  	.phy_id_mask	= 0xfffffff0,
  	.name		= "Broadcom BCM5461",
-@@ -710,6 +743,7 @@ module_phy_driver(broadcom_drivers);
+@@ -568,7 +598,7 @@ static struct phy_driver broadcom_driver
+ 			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+ 	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
+ 	.config_init	= bcm54xx_config_init,
+-	.config_aneg	= bcm54612e_config_aneg,
++	.config_aneg	= genphy_config_aneg,
+ 	.read_status	= genphy_read_status,
+ 	.ack_interrupt	= bcm_phy_ack_intr,
+ 	.config_intr	= bcm_phy_config_intr,
+@@ -710,6 +740,7 @@ module_phy_driver(broadcom_drivers);
  static struct mdio_device_id __maybe_unused broadcom_tbl[] = {
  	{ PHY_ID_BCM5411, 0xfffffff0 },
  	{ PHY_ID_BCM5421, 0xfffffff0 },