/**********************************************************************
 * Author: Cavium Networks
 *
 * Contact: support@caviumnetworks.com
 * 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 <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,
};

/**
 * cvm_oct_ioctl - IOCTL support for PHY control
 * @dev:    Device to change
 * @rq:     the request
 * @cmd:    the command
 *
 * Returns Zero on success
 */
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);
		}
	}
}


/**
 * cvm_oct_phy_setup_device - setup the PHY
 *
 * @dev:    Device to setup
 *
 * Returns Zero on success, negative on failure
 */
int cvm_oct_phy_setup_device(struct net_device *dev)
{
	struct octeon_ethernet *priv = netdev_priv(dev);

	int phy_addr = cvmx_helper_board_get_mii_address(priv->port);
	if (phy_addr != -1) {
		char phy_id[MII_BUS_ID_SIZE + 3];

		snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT, "mdio-octeon-0", phy_addr);

		priv->phydev = phy_connect(dev, phy_id, cvm_oct_adjust_link, 0,
					PHY_INTERFACE_MODE_GMII);

		if (IS_ERR(priv->phydev)) {
			priv->phydev = NULL;
			return -1;
		}
		priv->last_link = 0;
		phy_start_aneg(priv->phydev);
	}
	return 0;
}