static int arc_emac_mdio_write(struct mii_bus *bus, int phy_addr, int reg_num,
u16 value)
{
struct arc_emac_priv *priv = bus->priv;
arc_reg_set(priv, R_MDIO,
0x50020000 | (phy_addr << 23) | (reg_num << 18) | value);
return arc_mdio_complete_wait(priv);
}
/**
* arc_mdio_write - MDIO interface write function.
* @bus: Pointer to MII bus structure.
* @phy_addr: Address of the PHY device.
* @reg_num: PHY register to write to.
* @value: Value to be written into the register.
*
* returns: 0 on success, -ETIMEDOUT on a timeout.
*
* Writes the value to the requested register.
*/
static int arc_mdio_write(struct mii_bus *bus, int phy_addr,
int reg_num, u16 value)
{
struct arc_emac_priv *priv = bus->priv;
dev_dbg(priv->dev,
"arc_mdio_write(phy_addr=%i, reg_num=%x, value=%x)\n",
phy_addr, reg_num, value);
arc_reg_set(priv, R_MDIO,
0x50020000 | (phy_addr << 23) | (reg_num << 18) | value);
return arc_mdio_complete_wait(priv);
}
static int arc_emac_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num)
{
struct arc_emac_priv *priv = bus->priv;
int error;
arc_reg_set(priv, R_MDIO,
0x60020000 | (phy_addr << 23) | (reg_num << 18));
error = arc_mdio_complete_wait(priv);
if (error < 0)
return error;
return arc_reg_get(priv, R_MDIO) & 0xffff;
}
/**
* arc_mdio_read - MDIO interface read function.
* @bus: Pointer to MII bus structure.
* @phy_addr: Address of the PHY device.
* @reg_num: PHY register to read.
*
* returns: The register contents on success, -ETIMEDOUT on a timeout.
*
* Reads the contents of the requested register from the requested PHY
* address.
*/
static int arc_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num)
{
struct arc_emac_priv *priv = bus->priv;
unsigned int value;
int error;
arc_reg_set(priv, R_MDIO,
0x60020000 | (phy_addr << 23) | (reg_num << 18));
error = arc_mdio_complete_wait(priv);
if (error < 0)
return error;
value = arc_reg_get(priv, R_MDIO) & 0xffff;
dev_dbg(priv->dev, "arc_mdio_read(phy_addr=%i, reg_num=%x) = %x\n",
phy_addr, reg_num, value);
return value;
}
