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altera tse: add support for fixed-links. 

Add support for fixed-links in configurations without PHY.
(e.g. connection to a switch, SGMII point to point, SFPs)

Check: Documentation/devicetree/bindings/net/fixed-link.txt.
Signed-off-by: Andreas Oetken <ennoerlangen@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andreas Oetken 2015-04-25 18:07:52 +02:00 committed by David S. Miller
parent 0e03fd3e33
commit 7cdbc6f74f
1 changed files with 29 additions and 8 deletions
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37
drivers/net/ethernet/altera/altera_tse_main.c
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@ -777,6 +777,8 @@ static int init_phy(struct net_device *dev)
struct altera_tse_private *priv = netdev_priv(dev);
struct phy_device *phydev;
struct device_node *phynode;
bool fixed_link = false;
int rc = 0;
/* Avoid init phy in case of no phy present */
if (!priv->phy_iface)
@ -789,13 +791,32 @@ static int init_phy(struct net_device *dev)
phynode = of_parse_phandle(priv->device->of_node, "phy-handle", 0);
if (!phynode) {
netdev_dbg(dev, "no phy-handle found\n");
if (!priv->mdio) {
netdev_err(dev,
"No phy-handle nor local mdio specified\n");
return -ENODEV;
/* check if a fixed-link is defined in device-tree */
if (of_phy_is_fixed_link(priv->device->of_node)) {
rc = of_phy_register_fixed_link(priv->device->of_node);
if (rc < 0) {
netdev_err(dev, "cannot register fixed PHY\n");
return rc;
}
/* In the case of a fixed PHY, the DT node associated
* to the PHY is the Ethernet MAC DT node.
*/
phynode = of_node_get(priv->device->of_node);
fixed_link = true;
netdev_dbg(dev, "fixed-link detected\n");
phydev = of_phy_connect(dev, phynode,
&altera_tse_adjust_link,
0, priv->phy_iface);
} else {
netdev_dbg(dev, "no phy-handle found\n");
if (!priv->mdio) {
netdev_err(dev, "No phy-handle nor local mdio specified\n");
return -ENODEV;
}
phydev = connect_local_phy(dev);
}
phydev = connect_local_phy(dev);
} else {
netdev_dbg(dev, "phy-handle found\n");
phydev = of_phy_connect(dev, phynode,
@ -819,10 +840,10 @@ static int init_phy(struct net_device *dev)
/* Broken HW is sometimes missing the pull-up resistor on the
* MDIO line, which results in reads to non-existent devices returning
* 0 rather than 0xffff. Catch this here and treat 0 as a non-existent
* device as well.
* device as well. If a fixed-link is used the phy_id is always 0.
* Note: phydev->phy_id is the result of reading the UID PHY registers.
*/
if (phydev->phy_id == 0) {
if ((phydev->phy_id == 0) && !fixed_link) {
netdev_err(dev, "Bad PHY UID 0x%08x\n", phydev->phy_id);
phy_disconnect(phydev);
return -ENODEV;