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
  31 #include <net/dst.h>
  32
  33 #include <asm/octeon/octeon.h>
  34
  35 #include "ethernet-defines.h"
  36 #include "octeon-ethernet.h"
  37 #include "ethernet-mdio.h"
  38 #include "ethernet-util.h"
  39
  40 #include "cvmx-helper-board.h"
  41
  42 #include "cvmx-smix-defs.h"
  43
  44 static void cvm_oct_get_drvinfo(struct net_device *dev,
  45                                 struct ethtool_drvinfo *info)
  46 {
  47         strcpy(info->driver, "cavium-ethernet");
  48         strcpy(info->version, OCTEON_ETHERNET_VERSION);
  49         strcpy(info->bus_info, "Builtin");
  50 }
  51
  52 static int cvm_oct_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
  53 {
  54         struct octeon_ethernet *priv = netdev_priv(dev);
  55
  56         if (priv->phydev)
  57                 return phy_ethtool_gset(priv->phydev, cmd);
  58
  59         return -EINVAL;
  60 }
  61
  62 static int cvm_oct_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
  63 {
  64         struct octeon_ethernet *priv = netdev_priv(dev);
  65
  66         if (!capable(CAP_NET_ADMIN))
  67                 return -EPERM;
  68
  69         if (priv->phydev)
  70                 return phy_ethtool_sset(priv->phydev, cmd);
  71
  72         return -EINVAL;
  73 }
  74
  75 static int cvm_oct_nway_reset(struct net_device *dev)
  76 {
  77         struct octeon_ethernet *priv = netdev_priv(dev);
  78
  79         if (!capable(CAP_NET_ADMIN))
  80                 return -EPERM;
  81
  82         if (priv->phydev)
  83                 return phy_start_aneg(priv->phydev);
  84
  85         return -EINVAL;
  86 }
  87
  88 const struct ethtool_ops cvm_oct_ethtool_ops = {
  89         .get_drvinfo = cvm_oct_get_drvinfo,
  90         .get_settings = cvm_oct_get_settings,
  91         .set_settings = cvm_oct_set_settings,
  92         .nway_reset = cvm_oct_nway_reset,
  93         .get_link = ethtool_op_get_link,
  94         .get_sg = ethtool_op_get_sg,
  95         .get_tx_csum = ethtool_op_get_tx_csum,
  96 };
  97
  98 /**
  99  * cvm_oct_ioctl - IOCTL support for PHY control
 100  * @dev:    Device to change
 101  * @rq:     the request
 102  * @cmd:    the command
 103  *
 104  * Returns Zero on success
 105  */
 106 int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 107 {
 108         struct octeon_ethernet *priv = netdev_priv(dev);
 109
 110         if (!netif_running(dev))
 111                 return -EINVAL;
 112
 113         if (!priv->phydev)
 114                 return -EINVAL;
 115
 116         return phy_mii_ioctl(priv->phydev, rq, cmd);
 117 }
 118
 119 static void cvm_oct_adjust_link(struct net_device *dev)
 120 {
 121         struct octeon_ethernet *priv = netdev_priv(dev);
 122         cvmx_helper_link_info_t link_info;
 123
 124         if (priv->last_link != priv->phydev->link) {
 125                 priv->last_link = priv->phydev->link;
 126                 link_info.u64 = 0;
 127                 link_info.s.link_up = priv->last_link ? 1 : 0;
 128                 link_info.s.full_duplex = priv->phydev->duplex ? 1 : 0;
 129                 link_info.s.speed = priv->phydev->speed;
 130                 cvmx_helper_link_set( priv->port, link_info);
 131                 if (priv->last_link) {
 132                         netif_carrier_on(dev);
 133                         if (priv->queue != -1)
 134                                 DEBUGPRINT("%s: %u Mbps %s duplex, "
 135                                            "port %2d, queue %2d\n",
 136                                            dev->name, priv->phydev->speed,
 137                                            priv->phydev->duplex ?
 138                                                 "Full" : "Half",
 139                                            priv->port, priv->queue);
 140                         else
 141                                 DEBUGPRINT("%s: %u Mbps %s duplex, "
 142                                            "port %2d, POW\n",
 143                                            dev->name, priv->phydev->speed,
 144                                            priv->phydev->duplex ?
 145                                                 "Full" : "Half",
 146                                            priv->port);
 147                 } else {
 148                         netif_carrier_off(dev);
 149                         DEBUGPRINT("%s: Link down\n", dev->name);
 150                 }
 151         }
 152 }
 153
 154
 155 /**
 156  * cvm_oct_phy_setup_device - setup the PHY
 157  *
 158  * @dev:    Device to setup
 159  *
 160  * Returns Zero on success, negative on failure
 161  */
 162 int cvm_oct_phy_setup_device(struct net_device *dev)
 163 {
 164         struct octeon_ethernet *priv = netdev_priv(dev);
 165
 166         int phy_addr = cvmx_helper_board_get_mii_address(priv->port);
 167         if (phy_addr != -1) {
 168                 char phy_id[20];
 169
 170                 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT, "0", phy_addr);
 171
 172                 priv->phydev = phy_connect(dev, phy_id, cvm_oct_adjust_link, 0,
 173                                         PHY_INTERFACE_MODE_GMII);
 174
 175                 if (IS_ERR(priv->phydev)) {
 176                         priv->phydev = NULL;
 177                         return -1;
 178                 }
 179                 priv->last_link = 0;
 180                 phy_start_aneg(priv->phydev);
 181         }
 182         return 0;
 183 }