1 files changed, 180 insertions, 0 deletions

--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -12,12 +12,14 @@
  */
 
 #include <linux/phy.h>
+#include <linux/mdio.h>
 #include <linux/module.h>
 #include <linux/string.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/of_gpio.h>
 #include <linux/gpio/consumer.h>
+#include <linux/platform_data/phy-at803x.h>
 
 #define AT803X_INTR_ENABLE			0x12
 #define AT803X_INTR_STATUS			0x13
@@ -34,8 +36,16 @@
 #define AT803X_INER				0x0012
 #define AT803X_INER_INIT			0xec00
 #define AT803X_INSR				0x0013
+
+#define AT803X_PCS_SMART_EEE_CTRL3			0x805D
+#define AT803X_SMART_EEE_CTRL3_LPI_TX_DELAY_SEL_MASK	0x3
+#define AT803X_SMART_EEE_CTRL3_LPI_TX_DELAY_SEL_SHIFT	12
+#define AT803X_SMART_EEE_CTRL3_LPI_EN			BIT(8)
+
 #define AT803X_DEBUG_ADDR			0x1D
 #define AT803X_DEBUG_DATA			0x1E
+#define AT803X_DBG0_REG				0x00
+#define AT803X_DEBUG_RGMII_RX_CLK_DLY		BIT(8)
 #define AT803X_DEBUG_SYSTEM_MODE_CTRL		0x05
 #define AT803X_DEBUG_RGMII_TX_CLK_DLY		BIT(8)
 
@@ -50,6 +60,7 @@ MODULE_LICENSE("GPL");
 struct at803x_priv {
 	bool phy_reset:1;
 	struct gpio_desc *gpiod_reset;
+	int prev_speed;
 };
 
 struct at803x_context {
@@ -61,6 +72,43 @@ struct at803x_context {
 	u16 led_control;
 };
 
+static u16
+at803x_dbg_reg_rmw(struct phy_device *phydev, u16 reg, u16 clear, u16 set)
+{
+	struct mii_bus *bus = phydev->bus;
+	int val;
+
+	mutex_lock(&bus->mdio_lock);
+
+	bus->write(bus, phydev->addr, AT803X_DEBUG_ADDR, reg);
+	val = bus->read(bus, phydev->addr, AT803X_DEBUG_DATA);
+	if (val < 0) {
+		val = 0xffff;
+		goto out;
+	}
+
+	val &= ~clear;
+	val |= set;
+	bus->write(bus, phydev->addr, AT803X_DEBUG_DATA, val);
+
+out:
+	mutex_unlock(&bus->mdio_lock);
+	return val;
+}
+
+static inline void
+at803x_dbg_reg_set(struct phy_device *phydev, u16 reg, u16 set)
+{
+	at803x_dbg_reg_rmw(phydev, reg, 0, set);
+}
+
+static inline void
+at803x_dbg_reg_clr(struct phy_device *phydev, u16 reg, u16 clear)
+{
+	at803x_dbg_reg_rmw(phydev, reg, clear, 0);
+}
+
+
 /* save relevant PHY registers to private copy */
 static void at803x_context_save(struct phy_device *phydev,
 				struct at803x_context *context)
@@ -208,8 +256,16 @@ static int at803x_probe(struct phy_devic
 	return 0;
 }
 
+static void at803x_disable_smarteee(struct phy_device *phydev)
+{
+	phy_write_mmd(phydev, MDIO_MMD_PCS, AT803X_PCS_SMART_EEE_CTRL3,
+		1 << AT803X_SMART_EEE_CTRL3_LPI_TX_DELAY_SEL_SHIFT);
+	phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, 0);
+}
+
 static int at803x_config_init(struct phy_device *phydev)
 {
+	struct at803x_platform_data *pdata;
 	int ret;
 
 	ret = genphy_config_init(phydev);
@@ -227,6 +283,26 @@ static int at803x_config_init(struct phy
 			return ret;
 	}
 
+	pdata = dev_get_platdata(&phydev->dev);
+	if (pdata) {
+		if (pdata->disable_smarteee)
+			at803x_disable_smarteee(phydev);
+
+		if (pdata->enable_rgmii_rx_delay)
+			at803x_dbg_reg_set(phydev, AT803X_DBG0_REG,
+				AT803X_DEBUG_RGMII_RX_CLK_DLY);
+		else
+			at803x_dbg_reg_clr(phydev, AT803X_DBG0_REG,
+				AT803X_DEBUG_RGMII_RX_CLK_DLY);
+
+		if (pdata->enable_rgmii_tx_delay)
+			at803x_dbg_reg_set(phydev, AT803X_DEBUG_SYSTEM_MODE_CTRL,
+				AT803X_DEBUG_RGMII_TX_CLK_DLY);
+		else
+			at803x_dbg_reg_clr(phydev, AT803X_DEBUG_SYSTEM_MODE_CTRL,
+				AT803X_DEBUG_RGMII_TX_CLK_DLY);
+	}
+
 	return 0;
 }
 
@@ -258,6 +334,8 @@ static int at803x_config_intr(struct phy
 static void at803x_link_change_notify(struct phy_device *phydev)
 {
 	struct at803x_priv *priv = phydev->priv;
+	struct at803x_platform_data *pdata;
+	pdata = dev_get_platdata(&phydev->dev);
 
 	/*
 	 * Conduct a hardware reset for AT8030 every time a link loss is
@@ -288,6 +366,26 @@ static void at803x_link_change_notify(st
 			priv->phy_reset = false;
 		}
 	}
+	if (pdata && pdata->fixup_rgmii_tx_delay &&
+	    phydev->speed != priv->prev_speed) {
+		switch (phydev->speed) {
+		case SPEED_10:
+		case SPEED_100:
+			at803x_dbg_reg_set(phydev,
+				AT803X_DEBUG_SYSTEM_MODE_CTRL,
+				AT803X_DEBUG_RGMII_TX_CLK_DLY);
+			break;
+		case SPEED_1000:
+			at803x_dbg_reg_clr(phydev,
+				AT803X_DEBUG_SYSTEM_MODE_CTRL,
+				AT803X_DEBUG_RGMII_TX_CLK_DLY);
+			break;
+		default:
+			break;
+		}
+
+		priv->prev_speed = phydev->speed;
+	}
 }
 
 static struct phy_driver at803x_driver[] = {
--- /dev/null
+++ b/include/linux/platform_data/phy-at803x.h
@@ -0,0 +1,11 @@
+#ifndef _PHY_AT803X_PDATA_H
+#define _PHY_AT803X_PDATA_H
+
+struct at803x_platform_data {
+	int disable_smarteee:1;
+	int enable_rgmii_tx_delay:1;
+	int enable_rgmii_rx_delay:1;
+	int fixup_rgmii_tx_delay:1;
+};
+
+#endif /* _PHY_AT803X_PDATA_H */