ethernet-sgmii.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/netdevice.h>
#include <linux/ratelimit.h>
#include <net/dst.h>

#include <asm/octeon/octeon.h>

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

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

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

int cvm_oct_sgmii_open(struct net_device *dev)
{
    union cvmx_gmxx_prtx_cfg gmx_cfg;
    struct octeon_ethernet *priv = netdev_priv(dev);
    int interface = INTERFACE(priv->port);
    int index = INDEX(priv->port);
    cvmx_helper_link_info_t link_info;

    gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
    gmx_cfg.s.en = 1;
    cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);

    if (!octeon_is_simulation()) {
        link_info = cvmx_helper_link_get(priv->port);
        if (!link_info.s.link_up)
            netif_carrier_off(dev);
    }

    return 0;
}

int cvm_oct_sgmii_stop(struct net_device *dev)
{
    union cvmx_gmxx_prtx_cfg gmx_cfg;
    struct octeon_ethernet *priv = netdev_priv(dev);
    int interface = INTERFACE(priv->port);
    int index = INDEX(priv->port);

    gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
    gmx_cfg.s.en = 0;
    cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
    return 0;
}

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

    link_info = cvmx_helper_link_get(priv->port);
    if (link_info.u64 == priv->link_info)
        return;

    link_info = cvmx_helper_link_autoconf(priv->port);
    priv->link_info = link_info.u64;

    /* Tell Linux */
    if (link_info.s.link_up) {

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

int cvm_oct_sgmii_init(struct net_device *dev)
{
    struct octeon_ethernet *priv = netdev_priv(dev);
    cvm_oct_common_init(dev);
    dev->netdev_ops->ndo_stop(dev);
    if (!octeon_is_simulation() && priv->phydev == NULL)
        priv->poll = cvm_oct_sgmii_poll;

    /* FIXME: Need autoneg logic */
    return 0;
}

void cvm_oct_sgmii_uninit(struct net_device *dev)
{
    cvm_oct_common_uninit(dev);
}