From 3447cf2e9a11fd672de8b3cc613eabd97fe82053 Mon Sep 17 00:00:00 2001
From: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Date: Thu, 18 Jun 2015 16:42:47 +0800
Subject: [PATCH] net/phy: Add support for Realtek RTL8211F

RTL8211F has different register definitions from RTL8211E.
Specially it needs to enable TXDLY in case of RGMII.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/phy/realtek.c | 68 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 67 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
index 96a0f0fab3ca..45353613b2ed 100644
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -22,8 +22,12 @@
 #define RTL821x_INER		0x12
 #define RTL821x_INER_INIT	0x6400
 #define RTL821x_INSR		0x13
+#define RTL8211E_INER_LINK_STATUS 0x400
 
-#define	RTL8211E_INER_LINK_STATUS	0x400
+#define RTL8211F_INER_LINK_STATUS 0x0010
+#define RTL8211F_INSR		0x1d
+#define RTL8211F_PAGE_SELECT	0x1f
+#define RTL8211F_TX_DELAY	0x100
 
 MODULE_DESCRIPTION("Realtek PHY driver");
 MODULE_AUTHOR("Johnson Leung");
@@ -38,6 +42,18 @@ static int rtl821x_ack_interrupt(struct phy_device *phydev)
 	return (err < 0) ? err : 0;
 }
 
+static int rtl8211f_ack_interrupt(struct phy_device *phydev)
+{
+	int err;
+
+	phy_write(phydev, RTL8211F_PAGE_SELECT, 0xa43);
+	err = phy_read(phydev, RTL8211F_INSR);
+	/* restore to default page 0 */
+	phy_write(phydev, RTL8211F_PAGE_SELECT, 0x0);
+
+	return (err < 0) ? err : 0;
+}
+
 static int rtl8211b_config_intr(struct phy_device *phydev)
 {
 	int err;
@@ -64,6 +80,41 @@ static int rtl8211e_config_intr(struct phy_device *phydev)
 	return err;
 }
 
+static int rtl8211f_config_intr(struct phy_device *phydev)
+{
+	int err;
+
+	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
+		err = phy_write(phydev, RTL821x_INER,
+				RTL8211F_INER_LINK_STATUS);
+	else
+		err = phy_write(phydev, RTL821x_INER, 0);
+
+	return err;
+}
+
+static int rtl8211f_config_init(struct phy_device *phydev)
+{
+	int ret;
+	u16 reg;
+
+	ret = genphy_config_init(phydev);
+	if (ret < 0)
+		return ret;
+
+	if (phydev->interface == PHY_INTERFACE_MODE_RGMII) {
+		/* enable TXDLY */
+		phy_write(phydev, RTL8211F_PAGE_SELECT, 0xd08);
+		reg = phy_read(phydev, 0x11);
+		reg |= RTL8211F_TX_DELAY;
+		phy_write(phydev, 0x11, reg);
+		/* restore to default page 0 */
+		phy_write(phydev, RTL8211F_PAGE_SELECT, 0x0);
+	}
+
+	return 0;
+}
+
 static struct phy_driver realtek_drvs[] = {
 	{
 		.phy_id         = 0x00008201,
@@ -98,6 +149,20 @@ static struct phy_driver realtek_drvs[] = {
 		.suspend	= genphy_suspend,
 		.resume		= genphy_resume,
 		.driver		= { .owner = THIS_MODULE,},
+	}, {
+		.phy_id		= 0x001cc916,
+		.name		= "RTL8211F Gigabit Ethernet",
+		.phy_id_mask	= 0x001fffff,
+		.features	= PHY_GBIT_FEATURES,
+		.flags		= PHY_HAS_INTERRUPT,
+		.config_aneg	= &genphy_config_aneg,
+		.config_init	= &rtl8211f_config_init,
+		.read_status	= &genphy_read_status,
+		.ack_interrupt	= &rtl8211f_ack_interrupt,
+		.config_intr	= &rtl8211f_config_intr,
+		.suspend	= genphy_suspend,
+		.resume		= genphy_resume,
+		.driver		= { .owner = THIS_MODULE },
 	},
 };
 
@@ -106,6 +171,7 @@ module_phy_driver(realtek_drvs);
 static struct mdio_device_id __maybe_unused realtek_tbl[] = {
 	{ 0x001cc912, 0x001fffff },
 	{ 0x001cc915, 0x001fffff },
+	{ 0x001cc916, 0x001fffff },
 	{ }
 };
 
-- 
2.20.1