// SPDX-License-Identifier: GPL-2.0
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/*
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* This file is based on code from OCTEON SDK by Cavium Networks.
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*
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* Copyright (c) 2003-2007 Cavium Networks
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*/
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#include <linux/kernel.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include <linux/ratelimit.h>
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#include <linux/of_mdio.h>
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#include <generated/utsrelease.h>
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#include <net/dst.h>
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#include "octeon-ethernet.h"
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#include "ethernet-defines.h"
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#include "ethernet-mdio.h"
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#include "ethernet-util.h"
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static void cvm_oct_get_drvinfo(struct net_device *dev,
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struct ethtool_drvinfo *info)
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{
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strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
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strlcpy(info->version, UTS_RELEASE, sizeof(info->version));
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strlcpy(info->bus_info, "Builtin", sizeof(info->bus_info));
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}
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static int cvm_oct_nway_reset(struct net_device *dev)
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{
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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if (dev->phydev)
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return phy_start_aneg(dev->phydev);
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return -EINVAL;
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}
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const struct ethtool_ops cvm_oct_ethtool_ops = {
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.get_drvinfo = cvm_oct_get_drvinfo,
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.nway_reset = cvm_oct_nway_reset,
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.get_link = ethtool_op_get_link,
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.get_link_ksettings = phy_ethtool_get_link_ksettings,
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.set_link_ksettings = phy_ethtool_set_link_ksettings,
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};
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/**
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* cvm_oct_ioctl - IOCTL support for PHY control
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* @dev: Device to change
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* @rq: the request
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* @cmd: the command
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*
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* Returns Zero on success
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*/
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int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
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{
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if (!netif_running(dev))
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return -EINVAL;
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if (!dev->phydev)
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return -EINVAL;
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return phy_mii_ioctl(dev->phydev, rq, cmd);
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}
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void cvm_oct_note_carrier(struct octeon_ethernet *priv,
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union cvmx_helper_link_info li)
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{
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if (li.s.link_up) {
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pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n",
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netdev_name(priv->netdev), li.s.speed,
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(li.s.full_duplex) ? "Full" : "Half",
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priv->port, priv->queue);
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} else {
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pr_notice_ratelimited("%s: Link down\n",
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netdev_name(priv->netdev));
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}
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}
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void cvm_oct_adjust_link(struct net_device *dev)
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{
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struct octeon_ethernet *priv = netdev_priv(dev);
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union cvmx_helper_link_info link_info;
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link_info.u64 = 0;
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link_info.s.link_up = dev->phydev->link ? 1 : 0;
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link_info.s.full_duplex = dev->phydev->duplex ? 1 : 0;
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link_info.s.speed = dev->phydev->speed;
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priv->link_info = link_info.u64;
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/*
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* The polling task need to know about link status changes.
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*/
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if (priv->poll)
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priv->poll(dev);
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if (priv->last_link != dev->phydev->link) {
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priv->last_link = dev->phydev->link;
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cvmx_helper_link_set(priv->port, link_info);
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cvm_oct_note_carrier(priv, link_info);
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}
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}
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int cvm_oct_common_stop(struct net_device *dev)
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{
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struct octeon_ethernet *priv = netdev_priv(dev);
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int interface = INTERFACE(priv->port);
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union cvmx_helper_link_info link_info;
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union cvmx_gmxx_prtx_cfg gmx_cfg;
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int index = INDEX(priv->port);
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gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
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gmx_cfg.s.en = 0;
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cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
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priv->poll = NULL;
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if (dev->phydev)
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phy_disconnect(dev->phydev);
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if (priv->last_link) {
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link_info.u64 = 0;
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priv->last_link = 0;
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cvmx_helper_link_set(priv->port, link_info);
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cvm_oct_note_carrier(priv, link_info);
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}
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return 0;
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}
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/**
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* cvm_oct_phy_setup_device - setup the PHY
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*
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* @dev: Device to setup
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*
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* Returns Zero on success, negative on failure
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*/
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int cvm_oct_phy_setup_device(struct net_device *dev)
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{
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struct octeon_ethernet *priv = netdev_priv(dev);
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struct device_node *phy_node;
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struct phy_device *phydev = NULL;
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if (!priv->of_node)
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goto no_phy;
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phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
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if (!phy_node && of_phy_is_fixed_link(priv->of_node)) {
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phy_node = of_node_get(priv->of_node);
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}
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if (!phy_node)
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goto no_phy;
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phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
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priv->phy_mode);
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of_node_put(phy_node);
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if (!phydev)
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return -EPROBE_DEFER;
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priv->last_link = 0;
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phy_start(phydev);
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return 0;
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no_phy:
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/* If there is no phy, assume a direct MAC connection and that
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* the link is up.
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*/
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netif_carrier_on(dev);
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return 0;
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}
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