diff options
Diffstat (limited to 'drivers/staging/octeon/ethernet-mdio.c')
| -rw-r--r-- | drivers/staging/octeon/ethernet-mdio.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/drivers/staging/octeon/ethernet-mdio.c b/drivers/staging/octeon/ethernet-mdio.c new file mode 100644 index 000000000000..c798672d61b2 --- /dev/null +++ b/drivers/staging/octeon/ethernet-mdio.c @@ -0,0 +1,178 @@ +// 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 "octeon-ethernet.h" +#include "ethernet-defines.h" +#include "ethernet-mdio.h" +#include "ethernet-util.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, + union cvmx_helper_link_info 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); + union cvmx_helper_link_info 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); + union cvmx_helper_link_info 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; +} |