| 1 | /* |
| 2 | * This file is based on code from OCTEON SDK by Cavium Networks. |
| 3 | * |
| 4 | * Copyright (c) 2003-2007 Cavium Networks |
| 5 | * |
| 6 | * This file is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License, Version 2, as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/ethtool.h> |
| 13 | #include <linux/phy.h> |
| 14 | #include <linux/ratelimit.h> |
| 15 | #include <linux/of_mdio.h> |
| 16 | #include <generated/utsrelease.h> |
| 17 | #include <net/dst.h> |
| 18 | |
| 19 | #include <asm/octeon/octeon.h> |
| 20 | |
| 21 | #include "ethernet-defines.h" |
| 22 | #include "octeon-ethernet.h" |
| 23 | #include "ethernet-mdio.h" |
| 24 | #include "ethernet-util.h" |
| 25 | |
| 26 | #include <asm/octeon/cvmx-gmxx-defs.h> |
| 27 | #include <asm/octeon/cvmx-smix-defs.h> |
| 28 | |
| 29 | static void cvm_oct_get_drvinfo(struct net_device *dev, |
| 30 | struct ethtool_drvinfo *info) |
| 31 | { |
| 32 | strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
| 33 | strlcpy(info->version, UTS_RELEASE, sizeof(info->version)); |
| 34 | strlcpy(info->bus_info, "Builtin", sizeof(info->bus_info)); |
| 35 | } |
| 36 | |
| 37 | static int cvm_oct_nway_reset(struct net_device *dev) |
| 38 | { |
| 39 | if (!capable(CAP_NET_ADMIN)) |
| 40 | return -EPERM; |
| 41 | |
| 42 | if (dev->phydev) |
| 43 | return phy_start_aneg(dev->phydev); |
| 44 | |
| 45 | return -EINVAL; |
| 46 | } |
| 47 | |
| 48 | const struct ethtool_ops cvm_oct_ethtool_ops = { |
| 49 | .get_drvinfo = cvm_oct_get_drvinfo, |
| 50 | .nway_reset = cvm_oct_nway_reset, |
| 51 | .get_link = ethtool_op_get_link, |
| 52 | .get_link_ksettings = phy_ethtool_get_link_ksettings, |
| 53 | .set_link_ksettings = phy_ethtool_set_link_ksettings, |
| 54 | }; |
| 55 | |
| 56 | /** |
| 57 | * cvm_oct_ioctl - IOCTL support for PHY control |
| 58 | * @dev: Device to change |
| 59 | * @rq: the request |
| 60 | * @cmd: the command |
| 61 | * |
| 62 | * Returns Zero on success |
| 63 | */ |
| 64 | int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
| 65 | { |
| 66 | if (!netif_running(dev)) |
| 67 | return -EINVAL; |
| 68 | |
| 69 | if (!dev->phydev) |
| 70 | return -EINVAL; |
| 71 | |
| 72 | return phy_mii_ioctl(dev->phydev, rq, cmd); |
| 73 | } |
| 74 | |
| 75 | void cvm_oct_note_carrier(struct octeon_ethernet *priv, |
| 76 | cvmx_helper_link_info_t li) |
| 77 | { |
| 78 | if (li.s.link_up) { |
| 79 | pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n", |
| 80 | netdev_name(priv->netdev), li.s.speed, |
| 81 | (li.s.full_duplex) ? "Full" : "Half", |
| 82 | priv->port, priv->queue); |
| 83 | } else { |
| 84 | pr_notice_ratelimited("%s: Link down\n", |
| 85 | netdev_name(priv->netdev)); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | void cvm_oct_adjust_link(struct net_device *dev) |
| 90 | { |
| 91 | struct octeon_ethernet *priv = netdev_priv(dev); |
| 92 | cvmx_helper_link_info_t link_info; |
| 93 | |
| 94 | link_info.u64 = 0; |
| 95 | link_info.s.link_up = dev->phydev->link ? 1 : 0; |
| 96 | link_info.s.full_duplex = dev->phydev->duplex ? 1 : 0; |
| 97 | link_info.s.speed = dev->phydev->speed; |
| 98 | priv->link_info = link_info.u64; |
| 99 | |
| 100 | /* |
| 101 | * The polling task need to know about link status changes. |
| 102 | */ |
| 103 | if (priv->poll) |
| 104 | priv->poll(dev); |
| 105 | |
| 106 | if (priv->last_link != dev->phydev->link) { |
| 107 | priv->last_link = dev->phydev->link; |
| 108 | cvmx_helper_link_set(priv->port, link_info); |
| 109 | cvm_oct_note_carrier(priv, link_info); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | int cvm_oct_common_stop(struct net_device *dev) |
| 114 | { |
| 115 | struct octeon_ethernet *priv = netdev_priv(dev); |
| 116 | int interface = INTERFACE(priv->port); |
| 117 | cvmx_helper_link_info_t link_info; |
| 118 | union cvmx_gmxx_prtx_cfg gmx_cfg; |
| 119 | int index = INDEX(priv->port); |
| 120 | |
| 121 | gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); |
| 122 | gmx_cfg.s.en = 0; |
| 123 | cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64); |
| 124 | |
| 125 | priv->poll = NULL; |
| 126 | |
| 127 | if (dev->phydev) |
| 128 | phy_disconnect(dev->phydev); |
| 129 | |
| 130 | if (priv->last_link) { |
| 131 | link_info.u64 = 0; |
| 132 | priv->last_link = 0; |
| 133 | |
| 134 | cvmx_helper_link_set(priv->port, link_info); |
| 135 | cvm_oct_note_carrier(priv, link_info); |
| 136 | } |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * cvm_oct_phy_setup_device - setup the PHY |
| 142 | * |
| 143 | * @dev: Device to setup |
| 144 | * |
| 145 | * Returns Zero on success, negative on failure |
| 146 | */ |
| 147 | int cvm_oct_phy_setup_device(struct net_device *dev) |
| 148 | { |
| 149 | struct octeon_ethernet *priv = netdev_priv(dev); |
| 150 | struct device_node *phy_node; |
| 151 | struct phy_device *phydev = NULL; |
| 152 | |
| 153 | if (!priv->of_node) |
| 154 | goto no_phy; |
| 155 | |
| 156 | phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0); |
| 157 | if (!phy_node && of_phy_is_fixed_link(priv->of_node)) { |
| 158 | int rc; |
| 159 | |
| 160 | rc = of_phy_register_fixed_link(priv->of_node); |
| 161 | if (rc) |
| 162 | return rc; |
| 163 | |
| 164 | phy_node = of_node_get(priv->of_node); |
| 165 | } |
| 166 | if (!phy_node) |
| 167 | goto no_phy; |
| 168 | |
| 169 | phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0, |
| 170 | PHY_INTERFACE_MODE_GMII); |
| 171 | |
| 172 | if (!phydev) |
| 173 | return -ENODEV; |
| 174 | |
| 175 | priv->last_link = 0; |
| 176 | phy_start_aneg(phydev); |
| 177 | |
| 178 | return 0; |
| 179 | no_phy: |
| 180 | /* If there is no phy, assume a direct MAC connection and that |
| 181 | * the link is up. |
| 182 | */ |
| 183 | netif_carrier_on(dev); |
| 184 | return 0; |
| 185 | } |