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 <asm/octeon/octeon.h> 17 18 #include "ethernet-defines.h" 19 #include "octeon-ethernet.h" 20 #include "ethernet-mdio.h" 21 #include "ethernet-util.h" 22 23 #include <asm/octeon/cvmx-gmxx-defs.h> 24 #include <asm/octeon/cvmx-smix-defs.h> 25 26 static void cvm_oct_get_drvinfo(struct net_device *dev, 27 struct ethtool_drvinfo *info) 28 { 29 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); 30 strlcpy(info->version, UTS_RELEASE, sizeof(info->version)); 31 strlcpy(info->bus_info, "Builtin", sizeof(info->bus_info)); 32 } 33 34 static int cvm_oct_nway_reset(struct net_device *dev) 35 { 36 if (!capable(CAP_NET_ADMIN)) 37 return -EPERM; 38 39 if (dev->phydev) 40 return phy_start_aneg(dev->phydev); 41 42 return -EINVAL; 43 } 44 45 const struct ethtool_ops cvm_oct_ethtool_ops = { 46 .get_drvinfo = cvm_oct_get_drvinfo, 47 .nway_reset = cvm_oct_nway_reset, 48 .get_link = ethtool_op_get_link, 49 .get_link_ksettings = phy_ethtool_get_link_ksettings, 50 .set_link_ksettings = phy_ethtool_set_link_ksettings, 51 }; 52 53 /** 54 * cvm_oct_ioctl - IOCTL support for PHY control 55 * @dev: Device to change 56 * @rq: the request 57 * @cmd: the command 58 * 59 * Returns Zero on success 60 */ 61 int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 62 { 63 if (!netif_running(dev)) 64 return -EINVAL; 65 66 if (!dev->phydev) 67 return -EINVAL; 68 69 return phy_mii_ioctl(dev->phydev, rq, cmd); 70 } 71 72 void cvm_oct_note_carrier(struct octeon_ethernet *priv, 73 cvmx_helper_link_info_t li) 74 { 75 if (li.s.link_up) { 76 pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n", 77 netdev_name(priv->netdev), li.s.speed, 78 (li.s.full_duplex) ? "Full" : "Half", 79 priv->port, priv->queue); 80 } else { 81 pr_notice_ratelimited("%s: Link down\n", 82 netdev_name(priv->netdev)); 83 } 84 } 85 86 void cvm_oct_adjust_link(struct net_device *dev) 87 { 88 struct octeon_ethernet *priv = netdev_priv(dev); 89 cvmx_helper_link_info_t link_info; 90 91 link_info.u64 = 0; 92 link_info.s.link_up = dev->phydev->link ? 1 : 0; 93 link_info.s.full_duplex = dev->phydev->duplex ? 1 : 0; 94 link_info.s.speed = dev->phydev->speed; 95 priv->link_info = link_info.u64; 96 97 /* 98 * The polling task need to know about link status changes. 99 */ 100 if (priv->poll) 101 priv->poll(dev); 102 103 if (priv->last_link != dev->phydev->link) { 104 priv->last_link = dev->phydev->link; 105 cvmx_helper_link_set(priv->port, link_info); 106 cvm_oct_note_carrier(priv, link_info); 107 } 108 } 109 110 int cvm_oct_common_stop(struct net_device *dev) 111 { 112 struct octeon_ethernet *priv = netdev_priv(dev); 113 int interface = INTERFACE(priv->port); 114 cvmx_helper_link_info_t link_info; 115 union cvmx_gmxx_prtx_cfg gmx_cfg; 116 int index = INDEX(priv->port); 117 118 gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); 119 gmx_cfg.s.en = 0; 120 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64); 121 122 priv->poll = NULL; 123 124 if (dev->phydev) 125 phy_disconnect(dev->phydev); 126 127 if (priv->last_link) { 128 link_info.u64 = 0; 129 priv->last_link = 0; 130 131 cvmx_helper_link_set(priv->port, link_info); 132 cvm_oct_note_carrier(priv, link_info); 133 } 134 return 0; 135 } 136 137 /** 138 * cvm_oct_phy_setup_device - setup the PHY 139 * 140 * @dev: Device to setup 141 * 142 * Returns Zero on success, negative on failure 143 */ 144 int cvm_oct_phy_setup_device(struct net_device *dev) 145 { 146 struct octeon_ethernet *priv = netdev_priv(dev); 147 struct device_node *phy_node; 148 struct phy_device *phydev = NULL; 149 150 if (!priv->of_node) 151 goto no_phy; 152 153 phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0); 154 if (!phy_node && of_phy_is_fixed_link(priv->of_node)) { 155 int rc; 156 157 rc = of_phy_register_fixed_link(priv->of_node); 158 if (rc) 159 return rc; 160 161 phy_node = of_node_get(priv->of_node); 162 } 163 if (!phy_node) 164 goto no_phy; 165 166 phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0, 167 PHY_INTERFACE_MODE_GMII); 168 of_node_put(phy_node); 169 170 if (!phydev) 171 return -ENODEV; 172 173 priv->last_link = 0; 174 phy_start_aneg(phydev); 175 176 return 0; 177 no_phy: 178 /* If there is no phy, assume a direct MAC connection and that 179 * the link is up. 180 */ 181 netif_carrier_on(dev); 182 return 0; 183 } 184