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 #include <linux/of_mdio.h>
  32
  33 #include <net/dst.h>
  34
  35 #include <asm/octeon/octeon.h>
  36
  37 #include "ethernet-defines.h"
  38 #include "octeon-ethernet.h"
  39 #include "ethernet-mdio.h"
  40 #include "ethernet-util.h"
  41
  42 #include <asm/octeon/cvmx-helper-board.h>
  43
  44 #include <asm/octeon/cvmx-smix-defs.h>
  45
  46 static void cvm_oct_get_drvinfo(struct net_device *dev,
  47                                 struct ethtool_drvinfo *info)
  48 {
  49         strlcpy(info->driver, "cavium-ethernet", sizeof(info->driver));
  50         strlcpy(info->version, OCTEON_ETHERNET_VERSION, sizeof(info->version));
  51         strlcpy(info->bus_info, "Builtin", sizeof(info->bus_info));
  52 }
  53
  54 static int cvm_oct_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
  55 {
  56         struct octeon_ethernet *priv = netdev_priv(dev);
  57
  58         if (priv->phydev)
  59                 return phy_ethtool_gset(priv->phydev, cmd);
  60
  61         return -EINVAL;
  62 }
  63
  64 static int cvm_oct_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
  65 {
  66         struct octeon_ethernet *priv = netdev_priv(dev);
  67
  68         if (!capable(CAP_NET_ADMIN))
  69                 return -EPERM;
  70
  71         if (priv->phydev)
  72                 return phy_ethtool_sset(priv->phydev, cmd);
  73
  74         return -EINVAL;
  75 }
  76
  77 static int cvm_oct_nway_reset(struct net_device *dev)
  78 {
  79         struct octeon_ethernet *priv = netdev_priv(dev);
  80
  81         if (!capable(CAP_NET_ADMIN))
  82                 return -EPERM;
  83
  84         if (priv->phydev)
  85                 return phy_start_aneg(priv->phydev);
  86
  87         return -EINVAL;
  88 }
  89
  90 const struct ethtool_ops cvm_oct_ethtool_ops = {
  91         .get_drvinfo = cvm_oct_get_drvinfo,
  92         .get_settings = cvm_oct_get_settings,
  93         .set_settings = cvm_oct_set_settings,
  94         .nway_reset = cvm_oct_nway_reset,
  95         .get_link = ethtool_op_get_link,
  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_note_carrier(struct octeon_ethernet *priv,
 120                                  cvmx_helper_link_info_t li)
 121 {
 122         if (li.s.link_up) {
 123                 pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d\n",
 124                                       netdev_name(priv->netdev), li.s.speed,
 125                                       (li.s.full_duplex) ? "Full" : "Half",
 126                                       priv->port);
 127         } else {
 128                 pr_notice_ratelimited("%s: Link down\n",
 129                                       netdev_name(priv->netdev));
 130         }
 131 }
 132
 133 void cvm_oct_set_carrier(struct octeon_ethernet *priv,
 134                          cvmx_helper_link_info_t link_info)
 135 {
 136         cvm_oct_note_carrier(priv, link_info);
 137         if (link_info.s.link_up) {
 138                 if (!netif_carrier_ok(priv->netdev))
 139                         netif_carrier_on(priv->netdev);
 140         } else {
 141                 if (netif_carrier_ok(priv->netdev))
 142                         netif_carrier_off(priv->netdev);
 143         }
 144 }
 145
 146 void cvm_oct_adjust_link(struct net_device *dev)
 147 {
 148         struct octeon_ethernet *priv = netdev_priv(dev);
 149         cvmx_helper_link_info_t link_info;
 150
 151         if (priv->last_link != priv->phydev->link) {
 152                 priv->last_link = priv->phydev->link;
 153                 link_info.u64 = 0;
 154                 link_info.s.link_up = priv->last_link ? 1 : 0;
 155                 link_info.s.full_duplex = priv->phydev->duplex ? 1 : 0;
 156                 link_info.s.speed = priv->phydev->speed;
 157
 158                 cvmx_helper_link_set(priv->port, link_info);
 159                 cvm_oct_note_carrier(priv, link_info);
 160         }
 161 }
 162
 163 int cvm_oct_common_stop(struct net_device *dev)
 164 {
 165         struct octeon_ethernet *priv = netdev_priv(dev);
 166         cvmx_helper_link_info_t link_info;
 167
 168         priv->poll = NULL;
 169
 170         if (priv->phydev)
 171                 phy_disconnect(priv->phydev);
 172         priv->phydev = NULL;
 173
 174         if (priv->last_link) {
 175                 link_info.u64 = 0;
 176                 priv->last_link = 0;
 177
 178                 cvmx_helper_link_set(priv->port, link_info);
 179                 cvm_oct_note_carrier(priv, link_info);
 180         }
 181         return 0;
 182 }
 183
 184 /**
 185  * cvm_oct_phy_setup_device - setup the PHY
 186  *
 187  * @dev:    Device to setup
 188  *
 189  * Returns Zero on success, negative on failure
 190  */
 191 int cvm_oct_phy_setup_device(struct net_device *dev)
 192 {
 193         struct octeon_ethernet *priv = netdev_priv(dev);
 194         struct device_node *phy_node;
 195
 196         if (!priv->of_node)
 197                 goto no_phy;
 198
 199         phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
 200         if (!phy_node)
 201                 goto no_phy;
 202
 203         priv->phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
 204                                       PHY_INTERFACE_MODE_GMII);
 205
 206         if (priv->phydev == NULL)
 207                 return -ENODEV;
 208
 209         priv->last_link = 0;
 210         phy_start_aneg(priv->phydev);
 211
 212         return 0;
 213 no_phy:
 214         /* If there is no phy, assume a direct MAC connection and that
 215          * the link is up.
 216          */
 217         netif_carrier_on(dev);
 218         return 0;
 219 }