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path: root/drivers/net/usb/smsc95xx.c
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Diffstat (limited to 'drivers/net/usb/smsc95xx.c')
-rw-r--r--drivers/net/usb/smsc95xx.c46
1 files changed, 42 insertions, 4 deletions
diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index bfb58c91db04..32d2c60d334d 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -66,6 +66,7 @@ struct smsc95xx_priv {
spinlock_t mac_cr_lock;
u8 features;
u8 suspend_flags;
+ bool is_internal_phy;
struct irq_chip irqchip;
struct irq_domain *irqdomain;
struct fwnode_handle *irqfwnode;
@@ -252,6 +253,43 @@ done:
mutex_unlock(&dev->phy_mutex);
}
+static int smsc95xx_mdiobus_reset(struct mii_bus *bus)
+{
+ struct smsc95xx_priv *pdata;
+ struct usbnet *dev;
+ u32 val;
+ int ret;
+
+ dev = bus->priv;
+ pdata = dev->driver_priv;
+
+ if (pdata->is_internal_phy)
+ return 0;
+
+ mutex_lock(&dev->phy_mutex);
+
+ ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
+ if (ret < 0)
+ goto reset_out;
+
+ val |= PM_CTL_PHY_RST_;
+
+ ret = smsc95xx_write_reg(dev, PM_CTRL, val);
+ if (ret < 0)
+ goto reset_out;
+
+ /* Driver has no knowledge at this point about the external PHY.
+ * The 802.3 specifies that the reset process shall
+ * be completed within 0.5 s.
+ */
+ fsleep(500000);
+
+reset_out:
+ mutex_unlock(&dev->phy_mutex);
+
+ return 0;
+}
+
static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx)
{
struct usbnet *dev = bus->priv;
@@ -1052,7 +1090,6 @@ static void smsc95xx_handle_link_change(struct net_device *net)
static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
{
struct smsc95xx_priv *pdata;
- bool is_internal_phy;
char usb_path[64];
int ret, phy_irq;
u32 val;
@@ -1133,13 +1170,14 @@ static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
if (ret < 0)
goto free_mdio;
- is_internal_phy = !(val & HW_CFG_PSEL_);
- if (is_internal_phy)
+ pdata->is_internal_phy = !(val & HW_CFG_PSEL_);
+ if (pdata->is_internal_phy)
pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID);
pdata->mdiobus->priv = dev;
pdata->mdiobus->read = smsc95xx_mdiobus_read;
pdata->mdiobus->write = smsc95xx_mdiobus_write;
+ pdata->mdiobus->reset = smsc95xx_mdiobus_reset;
pdata->mdiobus->name = "smsc95xx-mdiobus";
pdata->mdiobus->parent = &dev->udev->dev;
@@ -1160,7 +1198,7 @@ static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
}
pdata->phydev->irq = phy_irq;
- pdata->phydev->is_internal = is_internal_phy;
+ pdata->phydev->is_internal = pdata->is_internal_phy;
/* detect device revision as different features may be available */
ret = smsc95xx_read_reg(dev, ID_REV, &val);