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1// SPDX-License-Identifier: GPL-2.02/*3 * This file is based on code from OCTEON SDK by Cavium Networks.4 *5 * Copyright (c) 2003-2007 Cavium Networks6 */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 <net/dst.h>14 15#include "octeon-ethernet.h"16#include "ethernet-defines.h"17#include "ethernet-mdio.h"18#include "ethernet-util.h"19 20static void cvm_oct_get_drvinfo(struct net_device *dev,21 struct ethtool_drvinfo *info)22{23 strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));24 strscpy(info->bus_info, "Builtin", sizeof(info->bus_info));25}26 27static int cvm_oct_nway_reset(struct net_device *dev)28{29 if (!capable(CAP_NET_ADMIN))30 return -EPERM;31 32 if (dev->phydev)33 return phy_start_aneg(dev->phydev);34 35 return -EINVAL;36}37 38const struct ethtool_ops cvm_oct_ethtool_ops = {39 .get_drvinfo = cvm_oct_get_drvinfo,40 .nway_reset = cvm_oct_nway_reset,41 .get_link = ethtool_op_get_link,42 .get_link_ksettings = phy_ethtool_get_link_ksettings,43 .set_link_ksettings = phy_ethtool_set_link_ksettings,44};45 46/**47 * cvm_oct_ioctl - IOCTL support for PHY control48 * @dev: Device to change49 * @rq: the request50 * @cmd: the command51 *52 * Returns Zero on success53 */54int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)55{56 if (!netif_running(dev))57 return -EINVAL;58 59 if (!dev->phydev)60 return -EINVAL;61 62 return phy_mii_ioctl(dev->phydev, rq, cmd);63}64 65void cvm_oct_note_carrier(struct octeon_ethernet *priv,66 union cvmx_helper_link_info li)67{68 if (li.s.link_up) {69 pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n",70 netdev_name(priv->netdev), li.s.speed,71 (li.s.full_duplex) ? "Full" : "Half",72 priv->port, priv->queue);73 } else {74 pr_notice_ratelimited("%s: Link down\n",75 netdev_name(priv->netdev));76 }77}78 79void cvm_oct_adjust_link(struct net_device *dev)80{81 struct octeon_ethernet *priv = netdev_priv(dev);82 union cvmx_helper_link_info link_info;83 84 link_info.u64 = 0;85 link_info.s.link_up = dev->phydev->link ? 1 : 0;86 link_info.s.full_duplex = dev->phydev->duplex ? 1 : 0;87 link_info.s.speed = dev->phydev->speed;88 priv->link_info = link_info.u64;89 90 /*91 * The polling task need to know about link status changes.92 */93 if (priv->poll)94 priv->poll(dev);95 96 if (priv->last_link != dev->phydev->link) {97 priv->last_link = dev->phydev->link;98 cvmx_helper_link_set(priv->port, link_info);99 cvm_oct_note_carrier(priv, link_info);100 }101}102 103int cvm_oct_common_stop(struct net_device *dev)104{105 struct octeon_ethernet *priv = netdev_priv(dev);106 int interface = INTERFACE(priv->port);107 union cvmx_helper_link_info link_info;108 union cvmx_gmxx_prtx_cfg gmx_cfg;109 int index = INDEX(priv->port);110 111 gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));112 gmx_cfg.s.en = 0;113 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);114 115 priv->poll = NULL;116 117 if (dev->phydev)118 phy_disconnect(dev->phydev);119 120 if (priv->last_link) {121 link_info.u64 = 0;122 priv->last_link = 0;123 124 cvmx_helper_link_set(priv->port, link_info);125 cvm_oct_note_carrier(priv, link_info);126 }127 return 0;128}129 130/**131 * cvm_oct_phy_setup_device - setup the PHY132 *133 * @dev: Device to setup134 *135 * Returns Zero on success, negative on failure136 */137int cvm_oct_phy_setup_device(struct net_device *dev)138{139 struct octeon_ethernet *priv = netdev_priv(dev);140 struct device_node *phy_node;141 struct phy_device *phydev = NULL;142 143 if (!priv->of_node)144 goto no_phy;145 146 phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);147 if (!phy_node && of_phy_is_fixed_link(priv->of_node))148 phy_node = of_node_get(priv->of_node);149 if (!phy_node)150 goto no_phy;151 152 phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,153 priv->phy_mode);154 of_node_put(phy_node);155 156 if (!phydev)157 return -EPROBE_DEFER;158 159 priv->last_link = 0;160 phy_start(phydev);161 162 return 0;163no_phy:164 /* If there is no phy, assume a direct MAC connection and that165 * the link is up.166 */167 netif_carrier_on(dev);168 return 0;169}170