/* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License
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*
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* Copyright (C) 2009-2016 John Crispin <blogic@openwrt.org>
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* Copyright (C) 2009-2016 Felix Fietkau <nbd@openwrt.org>
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* Copyright (C) 2013-2016 Michael Lee <igvtee@gmail.com>
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/phy.h>
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#include <linux/of_net.h>
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#include <linux/of_mdio.h>
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#include "mtk_eth_soc.h"
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#include "mdio.h"
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static int mtk_mdio_reset(struct mii_bus *bus)
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{
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/* TODO */
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return 0;
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}
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static void mtk_phy_link_adjust(struct net_device *dev)
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{
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struct mtk_eth *eth = netdev_priv(dev);
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unsigned long flags;
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int i;
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spin_lock_irqsave(ð->phy->lock, flags);
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for (i = 0; i < 8; i++) {
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if (eth->phy->phy_node[i]) {
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struct phy_device *phydev = eth->phy->phy[i];
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int status_change = 0;
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if (phydev->link)
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if (eth->phy->duplex[i] != phydev->duplex ||
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eth->phy->speed[i] != phydev->speed)
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status_change = 1;
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if (phydev->link != eth->link[i])
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status_change = 1;
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switch (phydev->speed) {
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case SPEED_1000:
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case SPEED_100:
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case SPEED_10:
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eth->link[i] = phydev->link;
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eth->phy->duplex[i] = phydev->duplex;
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eth->phy->speed[i] = phydev->speed;
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if (status_change &&
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eth->soc->mdio_adjust_link)
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eth->soc->mdio_adjust_link(eth, i);
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break;
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}
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}
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}
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spin_unlock_irqrestore(ð->phy->lock, flags);
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}
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int mtk_connect_phy_node(struct mtk_eth *eth, struct mtk_mac *mac,
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struct device_node *phy_node)
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{
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const __be32 *_port = NULL;
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struct phy_device *phydev;
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int phy_mode, port;
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_port = of_get_property(phy_node, "reg", NULL);
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if (!_port || (be32_to_cpu(*_port) >= 0x20)) {
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pr_err("%s: invalid port id\n", phy_node->name);
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return -EINVAL;
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}
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port = be32_to_cpu(*_port);
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phy_mode = of_get_phy_mode(phy_node);
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if (phy_mode < 0) {
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dev_err(eth->dev, "incorrect phy-mode %d\n", phy_mode);
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eth->phy->phy_node[port] = NULL;
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return -EINVAL;
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}
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phydev = of_phy_connect(eth->netdev[mac->id], phy_node,
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mtk_phy_link_adjust, 0, phy_mode);
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if (!phydev) {
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dev_err(eth->dev, "could not connect to PHY\n");
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eth->phy->phy_node[port] = NULL;
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return -ENODEV;
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}
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phydev->supported &= PHY_GBIT_FEATURES;
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phydev->advertising = phydev->supported;
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dev_info(eth->dev,
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"connected port %d to PHY at %s [uid=%08x, driver=%s]\n",
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port, phydev_name(phydev), phydev->phy_id,
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phydev->drv->name);
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eth->phy->phy[port] = phydev;
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eth->link[port] = 0;
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return 0;
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}
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static void phy_init(struct mtk_eth *eth, struct mtk_mac *mac,
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struct phy_device *phy)
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{
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phy_attach(eth->netdev[mac->id], phydev_name(phy),
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PHY_INTERFACE_MODE_MII);
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phy->autoneg = AUTONEG_ENABLE;
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phy->speed = 0;
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phy->duplex = 0;
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phy->supported &= PHY_BASIC_FEATURES;
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phy->advertising = phy->supported | ADVERTISED_Autoneg;
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phy_start_aneg(phy);
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}
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static int mtk_phy_connect(struct mtk_mac *mac)
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{
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struct mtk_eth *eth = mac->hw;
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int i;
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for (i = 0; i < 8; i++) {
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if (eth->phy->phy_node[i]) {
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if (!mac->phy_dev) {
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mac->phy_dev = eth->phy->phy[i];
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mac->phy_flags = MTK_PHY_FLAG_PORT;
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}
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} else if (eth->mii_bus) {
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struct phy_device *phy;
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phy = mdiobus_get_phy(eth->mii_bus, i);
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if (phy) {
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phy_init(eth, mac, phy);
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if (!mac->phy_dev) {
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mac->phy_dev = phy;
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mac->phy_flags = MTK_PHY_FLAG_ATTACH;
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}
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}
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}
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}
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return 0;
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}
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static void mtk_phy_disconnect(struct mtk_mac *mac)
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{
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struct mtk_eth *eth = mac->hw;
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unsigned long flags;
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int i;
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for (i = 0; i < 8; i++)
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if (eth->phy->phy_fixed[i]) {
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spin_lock_irqsave(ð->phy->lock, flags);
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eth->link[i] = 0;
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if (eth->soc->mdio_adjust_link)
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eth->soc->mdio_adjust_link(eth, i);
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spin_unlock_irqrestore(ð->phy->lock, flags);
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} else if (eth->phy->phy[i]) {
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phy_disconnect(eth->phy->phy[i]);
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} else if (eth->mii_bus) {
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struct phy_device *phy =
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mdiobus_get_phy(eth->mii_bus, i);
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if (phy)
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phy_detach(phy);
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}
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}
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static void mtk_phy_start(struct mtk_mac *mac)
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{
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struct mtk_eth *eth = mac->hw;
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unsigned long flags;
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int i;
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for (i = 0; i < 8; i++) {
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if (eth->phy->phy_fixed[i]) {
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spin_lock_irqsave(ð->phy->lock, flags);
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eth->link[i] = 1;
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if (eth->soc->mdio_adjust_link)
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eth->soc->mdio_adjust_link(eth, i);
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spin_unlock_irqrestore(ð->phy->lock, flags);
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} else if (eth->phy->phy[i]) {
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phy_start(eth->phy->phy[i]);
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}
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}
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}
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static void mtk_phy_stop(struct mtk_mac *mac)
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{
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struct mtk_eth *eth = mac->hw;
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unsigned long flags;
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int i;
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for (i = 0; i < 8; i++)
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if (eth->phy->phy_fixed[i]) {
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spin_lock_irqsave(ð->phy->lock, flags);
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eth->link[i] = 0;
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if (eth->soc->mdio_adjust_link)
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eth->soc->mdio_adjust_link(eth, i);
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spin_unlock_irqrestore(ð->phy->lock, flags);
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} else if (eth->phy->phy[i]) {
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phy_stop(eth->phy->phy[i]);
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}
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}
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static struct mtk_phy phy_ralink = {
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.connect = mtk_phy_connect,
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.disconnect = mtk_phy_disconnect,
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.start = mtk_phy_start,
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.stop = mtk_phy_stop,
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};
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int mtk_mdio_init(struct mtk_eth *eth)
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{
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struct device_node *mii_np;
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int err;
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if (!eth->soc->mdio_read || !eth->soc->mdio_write)
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return 0;
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spin_lock_init(&phy_ralink.lock);
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eth->phy = &phy_ralink;
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mii_np = of_get_child_by_name(eth->dev->of_node, "mdio-bus");
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if (!mii_np) {
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dev_err(eth->dev, "no %s child node found", "mdio-bus");
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return -ENODEV;
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}
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if (!of_device_is_available(mii_np)) {
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err = 0;
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goto err_put_node;
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}
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eth->mii_bus = mdiobus_alloc();
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if (!eth->mii_bus) {
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err = -ENOMEM;
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goto err_put_node;
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}
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eth->mii_bus->name = "mdio";
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eth->mii_bus->read = eth->soc->mdio_read;
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eth->mii_bus->write = eth->soc->mdio_write;
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eth->mii_bus->reset = mtk_mdio_reset;
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eth->mii_bus->priv = eth;
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eth->mii_bus->parent = eth->dev;
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snprintf(eth->mii_bus->id, MII_BUS_ID_SIZE, "%s", mii_np->name);
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err = of_mdiobus_register(eth->mii_bus, mii_np);
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if (err)
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goto err_free_bus;
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return 0;
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err_free_bus:
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kfree(eth->mii_bus);
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err_put_node:
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of_node_put(mii_np);
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eth->mii_bus = NULL;
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return err;
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}
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void mtk_mdio_cleanup(struct mtk_eth *eth)
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{
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if (!eth->mii_bus)
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return;
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mdiobus_unregister(eth->mii_bus);
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of_node_put(eth->mii_bus->dev.of_node);
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kfree(eth->mii_bus);
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}
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