usbnet: improve generic ethtool support

This adds generic support for the ethtool commands get_settings,
set_settings, get_link and nway_reset to usbnet. These are now
implemented using mii functions when a low-level driver supports
mdio_read/mdio_write and does not override the usbnet ethtool
commands with its own.

Currently, this applies to the asix and the mcs7830 drivers.
I have tested it on mcs7830.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: David Hollis <dhollis@davehollis.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 51 insertions, 1 deletions

diff --git a/drivers/usb/net/usbnet.c b/drivers/usb/net/usbnet.c
index af6d061dc79..decc1b17924 100644
--- a/drivers/usb/net/usbnet.c
+++ b/drivers/usb/net/usbnet.c
@@ -669,6 +669,37 @@ done:
  * they'll probably want to use this base set.
  */
 
+int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd)
+{
+	struct usbnet *dev = netdev_priv(net);
+
+	if (!dev->mii.mdio_read)
+		return -EOPNOTSUPP;
+
+	return mii_ethtool_gset(&dev->mii, cmd);
+}
+EXPORT_SYMBOL_GPL(usbnet_get_settings);
+
+int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd)
+{
+	struct usbnet *dev = netdev_priv(net);
+	int retval;
+
+	if (!dev->mii.mdio_write)
+		return -EOPNOTSUPP;
+
+	retval = mii_ethtool_sset(&dev->mii, cmd);
+
+	/* link speed/duplex might have changed */
+	if (dev->driver_info->link_reset)
+		dev->driver_info->link_reset(dev);
+
+	return retval;
+
+}
+EXPORT_SYMBOL_GPL(usbnet_set_settings);
+
+
 void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info)
 {
 	struct usbnet *dev = netdev_priv(net);
@@ -682,7 +713,7 @@ void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info)
 }
 EXPORT_SYMBOL_GPL(usbnet_get_drvinfo);
 
-static u32 usbnet_get_link (struct net_device *net)
+u32 usbnet_get_link (struct net_device *net)
 {
 	struct usbnet *dev = netdev_priv(net);
 
@@ -690,9 +721,14 @@ static u32 usbnet_get_link (struct net_device *net)
 	if (dev->driver_info->check_connect)
 		return dev->driver_info->check_connect (dev) == 0;
 
+	/* if the device has mii operations, use those */
+	if (dev->mii.mdio_read)
+		return mii_link_ok(&dev->mii);
+
 	/* Otherwise, say we're up (to avoid breaking scripts) */
 	return 1;
 }
+EXPORT_SYMBOL_GPL(usbnet_get_link);
 
 u32 usbnet_get_msglevel (struct net_device *net)
 {
@@ -710,10 +746,24 @@ void usbnet_set_msglevel (struct net_device *net, u32 level)
 }
 EXPORT_SYMBOL_GPL(usbnet_set_msglevel);
 
+int usbnet_nway_reset(struct net_device *net)
+{
+	struct usbnet *dev = netdev_priv(net);
+
+	if (!dev->mii.mdio_write)
+		return -EOPNOTSUPP;
+
+	return mii_nway_restart(&dev->mii);
+}
+EXPORT_SYMBOL_GPL(usbnet_nway_reset);
+
 /* drivers may override default ethtool_ops in their bind() routine */
 static struct ethtool_ops usbnet_ethtool_ops = {
+	.get_settings		= usbnet_get_settings,
+	.set_settings		= usbnet_set_settings,
 	.get_drvinfo		= usbnet_get_drvinfo,
 	.get_link		= usbnet_get_link,
+	.nway_reset		= usbnet_nway_reset,
 	.get_msglevel		= usbnet_get_msglevel,
 	.set_msglevel		= usbnet_set_msglevel,
 };