LXR linux/drivers/staging/octeon/ethernet-mdio.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * This file is based on code from OCTEON SDK by Cavium Networks.
   4 *
   5 * Copyright (c) 2003-2007 Cavium Networks
   6 */
   7
   8#include <linux/kernel.h>
   9#include <linux/ethtool.h>
  10#include <linux/phy.h>
  11#include <linux/ratelimit.h>
  12#include <linux/of_mdio.h>
  13#include <generated/utsrelease.h>
  14#include <net/dst.h>
  15
  16#include "octeon-ethernet.h"
  17#include "ethernet-defines.h"
  18#include "ethernet-mdio.h"
  19#include "ethernet-util.h"
  20
  21static void cvm_oct_get_drvinfo(struct net_device *dev,
  22                                struct ethtool_drvinfo *info)
  23{
  24        strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
  25        strscpy(info->version, UTS_RELEASE, sizeof(info->version));
  26        strscpy(info->bus_info, "Builtin", sizeof(info->bus_info));
  27}
  28
  29static int cvm_oct_nway_reset(struct net_device *dev)
  30{
  31        if (!capable(CAP_NET_ADMIN))
  32                return -EPERM;
  33
  34        if (dev->phydev)
  35                return phy_start_aneg(dev->phydev);
  36
  37        return -EINVAL;
  38}
  39
  40const struct ethtool_ops cvm_oct_ethtool_ops = {
  41        .get_drvinfo = cvm_oct_get_drvinfo,
  42        .nway_reset = cvm_oct_nway_reset,
  43        .get_link = ethtool_op_get_link,
  44        .get_link_ksettings = phy_ethtool_get_link_ksettings,
  45        .set_link_ksettings = phy_ethtool_set_link_ksettings,
  46};
  47
  48/**
  49 * cvm_oct_ioctl - IOCTL support for PHY control
  50 * @dev:    Device to change
  51 * @rq:     the request
  52 * @cmd:    the command
  53 *
  54 * Returns Zero on success
  55 */
  56int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  57{
  58        if (!netif_running(dev))
  59                return -EINVAL;
  60
  61        if (!dev->phydev)
  62                return -EINVAL;
  63
  64        return phy_mii_ioctl(dev->phydev, rq, cmd);
  65}
  66
  67void cvm_oct_note_carrier(struct octeon_ethernet *priv,
  68                          union cvmx_helper_link_info li)
  69{
  70        if (li.s.link_up) {
  71                pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n",
  72                                      netdev_name(priv->netdev), li.s.speed,
  73                                      (li.s.full_duplex) ? "Full" : "Half",
  74                                      priv->port, priv->queue);
  75        } else {
  76                pr_notice_ratelimited("%s: Link down\n",
  77                                      netdev_name(priv->netdev));
  78        }
  79}
  80
  81void cvm_oct_adjust_link(struct net_device *dev)
  82{
  83        struct octeon_ethernet *priv = netdev_priv(dev);
  84        union cvmx_helper_link_info link_info;
  85
  86        link_info.u64           = 0;
  87        link_info.s.link_up     = dev->phydev->link ? 1 : 0;
  88        link_info.s.full_duplex = dev->phydev->duplex ? 1 : 0;
  89        link_info.s.speed       = dev->phydev->speed;
  90        priv->link_info         = link_info.u64;
  91
  92        /*
  93         * The polling task need to know about link status changes.
  94         */
  95        if (priv->poll)
  96                priv->poll(dev);
  97
  98        if (priv->last_link != dev->phydev->link) {
  99                priv->last_link = dev->phydev->link;
 100                cvmx_helper_link_set(priv->port, link_info);
 101                cvm_oct_note_carrier(priv, link_info);
 102        }
 103}
 104
 105int cvm_oct_common_stop(struct net_device *dev)
 106{
 107        struct octeon_ethernet *priv = netdev_priv(dev);
 108        int interface = INTERFACE(priv->port);
 109        union cvmx_helper_link_info link_info;
 110        union cvmx_gmxx_prtx_cfg gmx_cfg;
 111        int index = INDEX(priv->port);
 112
 113        gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
 114        gmx_cfg.s.en = 0;
 115        cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
 116
 117        priv->poll = NULL;
 118
 119        if (dev->phydev)
 120                phy_disconnect(dev->phydev);
 121
 122        if (priv->last_link) {
 123                link_info.u64 = 0;
 124                priv->last_link = 0;
 125
 126                cvmx_helper_link_set(priv->port, link_info);
 127                cvm_oct_note_carrier(priv, link_info);
 128        }
 129        return 0;
 130}
 131
 132/**
 133 * cvm_oct_phy_setup_device - setup the PHY
 134 *
 135 * @dev:    Device to setup
 136 *
 137 * Returns Zero on success, negative on failure
 138 */
 139int cvm_oct_phy_setup_device(struct net_device *dev)
 140{
 141        struct octeon_ethernet *priv = netdev_priv(dev);
 142        struct device_node *phy_node;
 143        struct phy_device *phydev = NULL;
 144
 145        if (!priv->of_node)
 146                goto no_phy;
 147
 148        phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
 149        if (!phy_node && of_phy_is_fixed_link(priv->of_node))
 150                phy_node = of_node_get(priv->of_node);
 151        if (!phy_node)
 152                goto no_phy;
 153
 154        phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
 155                                priv->phy_mode);
 156        of_node_put(phy_node);
 157
 158        if (!phydev)
 159                return -EPROBE_DEFER;
 160
 161        priv->last_link = 0;
 162        phy_start(phydev);
 163
 164        return 0;
 165no_phy:
 166        /* If there is no phy, assume a direct MAC connection and that
 167         * the link is up.
 168         */
 169        netif_carrier_on(dev);
 170        return 0;
 171}
 172