drivers/staging/octeon/ethernet-mdio.c

   1 /**********************************************************************
   2  * Author: Cavium Networks
   3  *
   4  * Contact: support@caviumnetworks.com
   5  * This file is part of the OCTEON SDK
   6  *
   7  * Copyright (c) 2003-2007 Cavium Networks
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this file; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  22  * or visit http://www.gnu.org/licenses/.
  23  *
  24  * This file may also be available under a different license from Cavium.
  25  * Contact Cavium Networks for more information
  26 **********************************************************************/
  27 #include <linux/kernel.h>
  28 #include <linux/ethtool.h>
  29 #include <linux/phy.h>
  30 #include <linux/ratelimit.h>
  31
  32 #include <net/dst.h>
  33
  34 #include <asm/octeon/octeon.h>
  35
  36 #include "ethernet-defines.h"
  37 #include "octeon-ethernet.h"
  38 #include "ethernet-mdio.h"
  39 #include "ethernet-util.h"
  40
  41 #include <asm/octeon/cvmx-helper-board.h>
  42
  43 #include <asm/octeon/cvmx-smix-defs.h>
  44
  45 static void cvm_oct_get_drvinfo(struct net_device *dev,
  46                                 struct ethtool_drvinfo *info)
  47 {
  48         strcpy(info->driver, "cavium-ethernet");
  49         strcpy(info->version, OCTEON_ETHERNET_VERSION);
  50         strcpy(info->bus_info, "Builtin");
  51 }
  52
  53 static int cvm_oct_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
  54 {
  55         struct octeon_ethernet *priv = netdev_priv(dev);
  56
  57         if (priv->phydev)
  58                 return phy_ethtool_gset(priv->phydev, cmd);
  59
  60         return -EINVAL;
  61 }
  62
  63 static int cvm_oct_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
  64 {
  65         struct octeon_ethernet *priv = netdev_priv(dev);
  66
  67         if (!capable(CAP_NET_ADMIN))
  68                 return -EPERM;
  69
  70         if (priv->phydev)
  71                 return phy_ethtool_sset(priv->phydev, cmd);
  72
  73         return -EINVAL;
  74 }
  75
  76 static int cvm_oct_nway_reset(struct net_device *dev)
  77 {
  78         struct octeon_ethernet *priv = netdev_priv(dev);
  79
  80         if (!capable(CAP_NET_ADMIN))
  81                 return -EPERM;
  82
  83         if (priv->phydev)
  84                 return phy_start_aneg(priv->phydev);
  85
  86         return -EINVAL;
  87 }
  88
  89 const struct ethtool_ops cvm_oct_ethtool_ops = {
  90         .get_drvinfo = cvm_oct_get_drvinfo,
  91         .get_settings = cvm_oct_get_settings,
  92         .set_settings = cvm_oct_set_settings,
  93         .nway_reset = cvm_oct_nway_reset,
  94         .get_link = ethtool_op_get_link,
  95 };
  96
  97 /**
  98  * cvm_oct_ioctl - IOCTL support for PHY control
  99  * @dev:    Device to change
 100  * @rq:     the request
 101  * @cmd:    the command
 102  *
 103  * Returns Zero on success
 104  */
 105 int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 106 {
 107         struct octeon_ethernet *priv = netdev_priv(dev);
 108
 109         if (!netif_running(dev))
 110                 return -EINVAL;
 111
 112         if (!priv->phydev)
 113                 return -EINVAL;
 114
 115         return phy_mii_ioctl(priv->phydev, rq, cmd);
 116 }
 117
 118 static void cvm_oct_adjust_link(struct net_device *dev)
 119 {
 120         struct octeon_ethernet *priv = netdev_priv(dev);
 121         cvmx_helper_link_info_t link_info;
 122
 123         if (priv->last_link != priv->phydev->link) {
 124                 priv->last_link = priv->phydev->link;
 125                 link_info.u64 = 0;
 126                 link_info.s.link_up = priv->last_link ? 1 : 0;
 127                 link_info.s.full_duplex = priv->phydev->duplex ? 1 : 0;
 128                 link_info.s.speed = priv->phydev->speed;
 129                 cvmx_helper_link_set( priv->port, link_info);
 130                 if (priv->last_link) {
 131                         netif_carrier_on(dev);
 132                         if (priv->queue != -1)
 133                                 printk_ratelimited("%s: %u Mbps %s duplex, "
 134                                                    "port %2d, queue %2d\n",
 135                                                    dev->name, priv->phydev->speed,
 136                                                    priv->phydev->duplex ?
 137                                                    "Full" : "Half",
 138                                                    priv->port, priv->queue);
 139                         else
 140                                 printk_ratelimited("%s: %u Mbps %s duplex, "
 141                                                    "port %2d, POW\n",
 142                                                    dev->name, priv->phydev->speed,
 143                                                    priv->phydev->duplex ?
 144                                                    "Full" : "Half",
 145                                                    priv->port);
 146                 } else {
 147                         netif_carrier_off(dev);
 148                         printk_ratelimited("%s: Link down\n", dev->name);
 149                 }
 150         }
 151 }
 152
 153
 154 /**
 155  * cvm_oct_phy_setup_device - setup the PHY
 156  *
 157  * @dev:    Device to setup
 158  *
 159  * Returns Zero on success, negative on failure
 160  */
 161 int cvm_oct_phy_setup_device(struct net_device *dev)
 162 {
 163         struct octeon_ethernet *priv = netdev_priv(dev);
 164
 165         int phy_addr = cvmx_helper_board_get_mii_address(priv->port);
 166         if (phy_addr != -1) {
 167                 char phy_id[MII_BUS_ID_SIZE + 3];
 168
 169                 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT, "mdio-octeon-0", phy_addr);
 170
 171                 priv->phydev = phy_connect(dev, phy_id, cvm_oct_adjust_link, 0,
 172                                         PHY_INTERFACE_MODE_GMII);
 173
 174                 if (IS_ERR(priv->phydev)) {
 175                         priv->phydev = NULL;
 176                         return -1;
 177                 }
 178                 priv->last_link = 0;
 179                 phy_start_aneg(priv->phydev);
 180         }
 181         return 0;
 182 }