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