kernel/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         if (priv->last_link != priv->phydev->link) {
 122                 priv->last_link = priv->phydev->link;
 123                 link_info.u64 = 0;
 124                 link_info.s.link_up = priv->last_link ? 1 : 0;
 125                 link_info.s.full_duplex = priv->phydev->duplex ? 1 : 0;
 126                 link_info.s.speed = priv->phydev->speed;
 127
 128                 cvmx_helper_link_set(priv->port, link_info);
 129                 cvm_oct_note_carrier(priv, link_info);
 130         }
 131 }
 132
 133 int cvm_oct_common_stop(struct net_device *dev)
 134 {
 135         struct octeon_ethernet *priv = netdev_priv(dev);
 136         int interface = INTERFACE(priv->port);
 137         cvmx_helper_link_info_t link_info;
 138         union cvmx_gmxx_prtx_cfg gmx_cfg;
 139         int index = INDEX(priv->port);
 140
 141         gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 142         gmx_cfg.s.en = 0;
 143         cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 144
 145         priv->poll = NULL;
 146
 147         if (priv->phydev)
 148                 phy_disconnect(priv->phydev);
 149         priv->phydev = NULL;
 150
 151         if (priv->last_link) {
 152                 link_info.u64 = 0;
 153                 priv->last_link = 0;
 154
 155                 cvmx_helper_link_set(priv->port, link_info);
 156                 cvm_oct_note_carrier(priv, link_info);
 157         }
 158         return 0;
 159 }
 160
 161 /**
 162  * cvm_oct_phy_setup_device - setup the PHY
 163  *
 164  * @dev:    Device to setup
 165  *
 166  * Returns Zero on success, negative on failure
 167  */
 168 int cvm_oct_phy_setup_device(struct net_device *dev)
 169 {
 170         struct octeon_ethernet *priv = netdev_priv(dev);
 171         struct device_node *phy_node;
 172
 173         if (!priv->of_node)
 174                 goto no_phy;
 175
 176         phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
 177         if (!phy_node)
 178                 goto no_phy;
 179
 180         priv->phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
 181                                       PHY_INTERFACE_MODE_GMII);
 182
 183         if (priv->phydev == NULL)
 184                 return -ENODEV;
 185
 186         priv->last_link = 0;
 187         phy_start_aneg(priv->phydev);
 188
 189         return 0;
 190 no_phy:
 191         /* If there is no phy, assume a direct MAC connection and that
 192          * the link is up.
 193          */
 194         netif_carrier_on(dev);
 195         return 0;
 196 }