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--- 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)
@@ -209,8 +257,16 @@ 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);
@@ -228,6 +284,26 @@ 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;
}
@@ -259,6 +335,8 @@ 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
@@ -289,6 +367,26 @@ 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 */
|
