drivers/staging/octeon/ethernet-mdio.c

   1 /*
   2  * This file is based on code from OCTEON SDK by Cavium Networks.
   3  *
   4  * Copyright (c) 2003-2007 Cavium Networks
   5  *
   6  * This file is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License, Version 2, as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/phy.h>
  14 #include <linux/ratelimit.h>
  15 #include <linux/of_mdio.h>
  16 #include <generated/utsrelease.h>
  17 #include <net/dst.h>
  18
  19 #include <asm/octeon/octeon.h>
  20
  21 #include "ethernet-defines.h"
  22 #include "octeon-ethernet.h"
  23 #include "ethernet-mdio.h"
  24 #include "ethernet-util.h"
  25
  26 #include <asm/octeon/cvmx-gmxx-defs.h>
  27 #include <asm/octeon/cvmx-smix-defs.h>
  28
  29 static void cvm_oct_get_drvinfo(struct net_device *dev,
  30                                 struct ethtool_drvinfo *info)
  31 {
  32         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
  33         strlcpy(info->version, UTS_RELEASE, sizeof(info->version));
  34         strlcpy(info->bus_info, "Builtin", sizeof(info->bus_info));
  35 }
  36
  37 static int cvm_oct_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
  38 {
  39         struct octeon_ethernet *priv = netdev_priv(dev);
  40
  41         if (priv->phydev)
  42                 return phy_ethtool_gset(priv->phydev, cmd);
  43
  44         return -EINVAL;
  45 }
  46
  47 static int cvm_oct_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
  48 {
  49         struct octeon_ethernet *priv = netdev_priv(dev);
  50
  51         if (!capable(CAP_NET_ADMIN))
  52                 return -EPERM;
  53
  54         if (priv->phydev)
  55                 return phy_ethtool_sset(priv->phydev, cmd);
  56
  57         return -EINVAL;
  58 }
  59
  60 static int cvm_oct_nway_reset(struct net_device *dev)
  61 {
  62         struct octeon_ethernet *priv = netdev_priv(dev);
  63
  64         if (!capable(CAP_NET_ADMIN))
  65                 return -EPERM;
  66
  67         if (priv->phydev)
  68                 return phy_start_aneg(priv->phydev);
  69
  70         return -EINVAL;
  71 }
  72
  73 const struct ethtool_ops cvm_oct_ethtool_ops = {
  74         .get_drvinfo = cvm_oct_get_drvinfo,
  75         .get_settings = cvm_oct_get_settings,
  76         .set_settings = cvm_oct_set_settings,
  77         .nway_reset = cvm_oct_nway_reset,
  78         .get_link = ethtool_op_get_link,
  79 };
  80
  81 /**
  82  * cvm_oct_ioctl - IOCTL support for PHY control
  83  * @dev:    Device to change
  84  * @rq:     the request
  85  * @cmd:    the command
  86  *
  87  * Returns Zero on success
  88  */
  89 int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  90 {
  91         struct octeon_ethernet *priv = netdev_priv(dev);
  92
  93         if (!netif_running(dev))
  94                 return -EINVAL;
  95
  96         if (!priv->phydev)
  97                 return -EINVAL;
  98
  99         return phy_mii_ioctl(priv->phydev, rq, cmd);
 100 }
 101
 102 void cvm_oct_note_carrier(struct octeon_ethernet *priv,
 103                           cvmx_helper_link_info_t li)
 104 {
 105         if (li.s.link_up) {
 106                 pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n",
 107                                       netdev_name(priv->netdev), li.s.speed,
 108                                       (li.s.full_duplex) ? "Full" : "Half",
 109                                       priv->port, priv->queue);
 110         } else {
 111                 pr_notice_ratelimited("%s: Link down\n",
 112                                       netdev_name(priv->netdev));
 113         }
 114 }
 115
 116 void cvm_oct_adjust_link(struct net_device *dev)
 117 {
 118         struct octeon_ethernet *priv = netdev_priv(dev);
 119         cvmx_helper_link_info_t link_info;
 120
 121         link_info.u64           = 0;
 122         link_info.s.link_up     = priv->phydev->link ? 1 : 0;
 123         link_info.s.full_duplex = priv->phydev->duplex ? 1 : 0;
 124         link_info.s.speed       = priv->phydev->speed;
 125         priv->link_info         = link_info.u64;
 126
 127         /*
 128          * The polling task need to know about link status changes.
 129          */
 130         if (priv->poll)
 131                 priv->poll(dev);
 132
 133         if (priv->last_link != priv->phydev->link) {
 134                 priv->last_link = priv->phydev->link;
 135                 cvmx_helper_link_set(priv->port, link_info);
 136                 cvm_oct_note_carrier(priv, link_info);
 137         }
 138 }
 139
 140 int cvm_oct_common_stop(struct net_device *dev)
 141 {
 142         struct octeon_ethernet *priv = netdev_priv(dev);
 143         int interface = INTERFACE(priv->port);
 144         cvmx_helper_link_info_t link_info;
 145         union cvmx_gmxx_prtx_cfg gmx_cfg;
 146         int index = INDEX(priv->port);
 147
 148         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 149         gmx_cfg.s.en = 0;
 150         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 151
 152         priv->poll = NULL;
 153
 154         if (priv->phydev)
 155                 phy_disconnect(priv->phydev);
 156         priv->phydev = NULL;
 157
 158         if (priv->last_link) {
 159                 link_info.u64 = 0;
 160                 priv->last_link = 0;
 161
 162                 cvmx_helper_link_set(priv->port, link_info);
 163                 cvm_oct_note_carrier(priv, link_info);
 164         }
 165         return 0;
 166 }
 167
 168 /**
 169  * cvm_oct_phy_setup_device - setup the PHY
 170  *
 171  * @dev:    Device to setup
 172  *
 173  * Returns Zero on success, negative on failure
 174  */
 175 int cvm_oct_phy_setup_device(struct net_device *dev)
 176 {
 177         struct octeon_ethernet *priv = netdev_priv(dev);
 178         struct device_node *phy_node;
 179
 180         if (!priv->of_node)
 181                 goto no_phy;
 182
 183         phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
 184         if (!phy_node && of_phy_is_fixed_link(priv->of_node)) {
 185                 int rc;
 186
 187                 rc = of_phy_register_fixed_link(priv->of_node);
 188                 if (rc)
 189                         return rc;
 190
 191                 phy_node = of_node_get(priv->of_node);
 192         }
 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)
 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 }