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-gmxx-defs.h>
  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         strlcpy(info->driver, "cavium-ethernet", sizeof(info->driver));
  49         strlcpy(info->version, OCTEON_ETHERNET_VERSION, sizeof(info->version));
  50         strlcpy(info->bus_info, "Builtin", sizeof(info->bus_info));
  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 void cvm_oct_note_carrier(struct octeon_ethernet *priv,
 119                           cvmx_helper_link_info_t li)
 120 {
 121         if (li.s.link_up) {
 122                 pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n",
 123                                       netdev_name(priv->netdev), li.s.speed,
 124                                       (li.s.full_duplex) ? "Full" : "Half",
 125                                       priv->port, priv->queue);
 126         } else {
 127                 pr_notice_ratelimited("%s: Link down\n",
 128                                       netdev_name(priv->netdev));
 129         }
 130 }
 131
 132 void cvm_oct_adjust_link(struct net_device *dev)
 133 {
 134         struct octeon_ethernet *priv = netdev_priv(dev);
 135         cvmx_helper_link_info_t link_info;
 136
 137         if (priv->last_link != priv->phydev->link) {
 138                 priv->last_link = priv->phydev->link;
 139                 link_info.u64 = 0;
 140                 link_info.s.link_up = priv->last_link ? 1 : 0;
 141                 link_info.s.full_duplex = priv->phydev->duplex ? 1 : 0;
 142                 link_info.s.speed = priv->phydev->speed;
 143
 144                 cvmx_helper_link_set(priv->port, link_info);
 145                 cvm_oct_note_carrier(priv, link_info);
 146         }
 147 }
 148
 149 int cvm_oct_common_stop(struct net_device *dev)
 150 {
 151         struct octeon_ethernet *priv = netdev_priv(dev);
 152         int interface = INTERFACE(priv->port);
 153         cvmx_helper_link_info_t link_info;
 154         union cvmx_gmxx_prtx_cfg gmx_cfg;
 155         int index = INDEX(priv->port);
 156
 157         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 158         gmx_cfg.s.en = 0;
 159         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 160
 161         priv->poll = NULL;
 162
 163         if (priv->phydev)
 164                 phy_disconnect(priv->phydev);
 165         priv->phydev = NULL;
 166
 167         if (priv->last_link) {
 168                 link_info.u64 = 0;
 169                 priv->last_link = 0;
 170
 171                 cvmx_helper_link_set(priv->port, link_info);
 172                 cvm_oct_note_carrier(priv, link_info);
 173         }
 174         return 0;
 175 }
 176
 177 /**
 178  * cvm_oct_phy_setup_device - setup the PHY
 179  *
 180  * @dev:    Device to setup
 181  *
 182  * Returns Zero on success, negative on failure
 183  */
 184 int cvm_oct_phy_setup_device(struct net_device *dev)
 185 {
 186         struct octeon_ethernet *priv = netdev_priv(dev);
 187         struct device_node *phy_node;
 188
 189         if (!priv->of_node)
 190                 goto no_phy;
 191
 192         phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
 193         if (!phy_node)
 194                 goto no_phy;
 195
 196         priv->phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
 197                                       PHY_INTERFACE_MODE_GMII);
 198
 199         if (priv->phydev == NULL)
 200                 return -ENODEV;
 201
 202         priv->last_link = 0;
 203         phy_start_aneg(priv->phydev);
 204
 205         return 0;
 206 no_phy:
 207         /* If there is no phy, assume a direct MAC connection and that
 208          * the link is up.
 209          */
 210         netif_carrier_on(dev);
 211         return 0;
 212 }