ethernet-mdio.c

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/**********************************************************************
 * Author: Cavium Networks
 *
 * Contact: [email protected]
 * This file is part of the OCTEON SDK
 *
 * Copyright (c) 2003-2007 Cavium Networks
 *
 * This file is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, Version 2, as
 * published by the Free Software Foundation.
 *
 * This file is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this file; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 * or visit http://www.gnu.org/licenses/.
 *
 * This file may also be available under a different license from Cavium.
 * Contact Cavium Networks for more information
**********************************************************************/
#include <linux/kernel.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/ratelimit.h>
#include <linux/of_mdio.h>

#include <net/dst.h>

#include <asm/octeon/octeon.h>

#include "ethernet-defines.h"
#include "octeon-ethernet.h"
#include "ethernet-mdio.h"
#include "ethernet-util.h"

#include <asm/octeon/cvmx-helper-board.h>

#include <asm/octeon/cvmx-smix-defs.h>

static void cvm_oct_get_drvinfo(struct net_device *dev,
                struct ethtool_drvinfo *info)
{
    strcpy(info->driver, "cavium-ethernet");
    strcpy(info->version, OCTEON_ETHERNET_VERSION);
    strcpy(info->bus_info, "Builtin");
}

static int cvm_oct_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
    struct octeon_ethernet *priv = netdev_priv(dev);

    if (priv->phydev)
        return phy_ethtool_gset(priv->phydev, cmd);

    return -EINVAL;
}

static int cvm_oct_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
    struct octeon_ethernet *priv = netdev_priv(dev);

    if (!capable(CAP_NET_ADMIN))
        return -EPERM;

    if (priv->phydev)
        return phy_ethtool_sset(priv->phydev, cmd);

    return -EINVAL;
}

static int cvm_oct_nway_reset(struct net_device *dev)
{
    struct octeon_ethernet *priv = netdev_priv(dev);

    if (!capable(CAP_NET_ADMIN))
        return -EPERM;

    if (priv->phydev)
        return phy_start_aneg(priv->phydev);

    return -EINVAL;
}

const struct ethtool_ops cvm_oct_ethtool_ops = {
    .get_drvinfo = cvm_oct_get_drvinfo,
    .get_settings = cvm_oct_get_settings,
    .set_settings = cvm_oct_set_settings,
    .nway_reset = cvm_oct_nway_reset,
    .get_link = ethtool_op_get_link,
};

int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
    struct octeon_ethernet *priv = netdev_priv(dev);

    if (!netif_running(dev))
        return -EINVAL;

    if (!priv->phydev)
        return -EINVAL;

    return phy_mii_ioctl(priv->phydev, rq, cmd);
}

static void cvm_oct_adjust_link(struct net_device *dev)
{
    struct octeon_ethernet *priv = netdev_priv(dev);
    cvmx_helper_link_info_t link_info;

    if (priv->last_link != priv->phydev->link) {
        priv->last_link = priv->phydev->link;
        link_info.u64 = 0;
        link_info.s.link_up = priv->last_link ? 1 : 0;
        link_info.s.full_duplex = priv->phydev->duplex ? 1 : 0;
        link_info.s.speed = priv->phydev->speed;
        cvmx_helper_link_set( priv->port, link_info);
        if (priv->last_link) {
            netif_carrier_on(dev);
            if (priv->queue != -1)
                printk_ratelimited("%s: %u Mbps %s duplex, "
                           "port %2d, queue %2d\n",
                           dev->name, priv->phydev->speed,
                           priv->phydev->duplex ?
                           "Full" : "Half",
                           priv->port, priv->queue);
            else
                printk_ratelimited("%s: %u Mbps %s duplex, "
                           "port %2d, POW\n",
                           dev->name, priv->phydev->speed,
                           priv->phydev->duplex ?
                           "Full" : "Half",
                           priv->port);
        } else {
            netif_carrier_off(dev);
            printk_ratelimited("%s: Link down\n", dev->name);
        }
    }
}


int cvm_oct_phy_setup_device(struct net_device *dev)
{
    struct octeon_ethernet *priv = netdev_priv(dev);
    struct device_node *phy_node;

    if (!priv->of_node)
        return 0;

    phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
    if (!phy_node)
        return 0;

    priv->phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
                      PHY_INTERFACE_MODE_GMII);

    if (priv->phydev == NULL)
        return -ENODEV;

    priv->last_link = 0;
    phy_start_aneg(priv->phydev);

    return 0;
}