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net: bcmgenet: enable driver to work without a device tree
Modify bcmgenet driver so that it can be used on Broadcom 7xxx MIPS-based STB platforms without a device tree. Signed-off-by: Petri Gynther <pgynther@google.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -62,7 +62,6 @@ config BCM63XX_ENET
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config BCMGENET
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tristate "Broadcom GENET internal MAC support"
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depends on OF
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select MII
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select PHYLIB
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select FIXED_PHY if BCMGENET=y
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@ -42,6 +42,7 @@
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/phy.h>
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#include <linux/platform_data/bcmgenet.h>
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#include <asm/unaligned.h>
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@ -2586,8 +2587,9 @@ static const struct of_device_id bcmgenet_match[] = {
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static int bcmgenet_probe(struct platform_device *pdev)
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{
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struct bcmgenet_platform_data *pd = pdev->dev.platform_data;
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struct device_node *dn = pdev->dev.of_node;
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const struct of_device_id *of_id;
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const struct of_device_id *of_id = NULL;
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struct bcmgenet_priv *priv;
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struct net_device *dev;
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const void *macaddr;
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@ -2601,9 +2603,11 @@ static int bcmgenet_probe(struct platform_device *pdev)
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return -ENOMEM;
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}
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of_id = of_match_node(bcmgenet_match, dn);
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if (!of_id)
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return -EINVAL;
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if (dn) {
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of_id = of_match_node(bcmgenet_match, dn);
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if (!of_id)
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return -EINVAL;
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}
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priv = netdev_priv(dev);
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priv->irq0 = platform_get_irq(pdev, 0);
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@ -2615,11 +2619,15 @@ static int bcmgenet_probe(struct platform_device *pdev)
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goto err;
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}
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macaddr = of_get_mac_address(dn);
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if (!macaddr) {
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dev_err(&pdev->dev, "can't find MAC address\n");
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err = -EINVAL;
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goto err;
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if (dn) {
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macaddr = of_get_mac_address(dn);
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if (!macaddr) {
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dev_err(&pdev->dev, "can't find MAC address\n");
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err = -EINVAL;
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goto err;
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}
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} else {
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macaddr = pd->mac_address;
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}
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r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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@ -2659,7 +2667,10 @@ static int bcmgenet_probe(struct platform_device *pdev)
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priv->dev = dev;
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priv->pdev = pdev;
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priv->version = (enum bcmgenet_version)of_id->data;
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if (of_id)
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priv->version = (enum bcmgenet_version)of_id->data;
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else
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priv->version = pd->genet_version;
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priv->clk = devm_clk_get(&priv->pdev->dev, "enet");
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if (IS_ERR(priv->clk))
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@ -23,6 +23,7 @@
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#include <linux/of.h>
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#include <linux/of_net.h>
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#include <linux/of_mdio.h>
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#include <linux/platform_data/bcmgenet.h>
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#include "bcmgenet.h"
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@ -312,22 +313,6 @@ static int bcmgenet_mii_probe(struct net_device *dev)
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u32 phy_flags;
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int ret;
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if (priv->phydev) {
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pr_info("PHY already attached\n");
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return 0;
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}
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/* In the case of a fixed PHY, the DT node associated
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* to the PHY is the Ethernet MAC DT node.
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*/
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if (!priv->phy_dn && of_phy_is_fixed_link(dn)) {
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ret = of_phy_register_fixed_link(dn);
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if (ret)
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return ret;
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priv->phy_dn = of_node_get(dn);
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}
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/* Communicate the integrated PHY revision */
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phy_flags = priv->gphy_rev;
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@ -337,11 +322,39 @@ static int bcmgenet_mii_probe(struct net_device *dev)
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priv->old_duplex = -1;
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priv->old_pause = -1;
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phydev = of_phy_connect(dev, priv->phy_dn, bcmgenet_mii_setup,
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phy_flags, priv->phy_interface);
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if (!phydev) {
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pr_err("could not attach to PHY\n");
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return -ENODEV;
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if (dn) {
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if (priv->phydev) {
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pr_info("PHY already attached\n");
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return 0;
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}
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/* In the case of a fixed PHY, the DT node associated
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* to the PHY is the Ethernet MAC DT node.
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*/
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if (!priv->phy_dn && of_phy_is_fixed_link(dn)) {
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ret = of_phy_register_fixed_link(dn);
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if (ret)
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return ret;
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priv->phy_dn = of_node_get(dn);
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}
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phydev = of_phy_connect(dev, priv->phy_dn, bcmgenet_mii_setup,
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phy_flags, priv->phy_interface);
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if (!phydev) {
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pr_err("could not attach to PHY\n");
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return -ENODEV;
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}
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} else {
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phydev = priv->phydev;
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phydev->dev_flags = phy_flags;
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ret = phy_connect_direct(dev, phydev, bcmgenet_mii_setup,
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priv->phy_interface);
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if (ret) {
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pr_err("could not attach to PHY\n");
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return -ENODEV;
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}
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}
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priv->phydev = phydev;
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@ -438,6 +451,75 @@ static int bcmgenet_mii_of_init(struct bcmgenet_priv *priv)
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return 0;
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}
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static int bcmgenet_mii_pd_init(struct bcmgenet_priv *priv)
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{
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struct device *kdev = &priv->pdev->dev;
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struct bcmgenet_platform_data *pd = kdev->platform_data;
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struct mii_bus *mdio = priv->mii_bus;
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struct phy_device *phydev;
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int ret;
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if (pd->phy_interface != PHY_INTERFACE_MODE_MOCA && pd->mdio_enabled) {
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/*
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* Internal or external PHY with MDIO access
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*/
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if (pd->phy_address >= 0 && pd->phy_address < PHY_MAX_ADDR)
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mdio->phy_mask = ~(1 << pd->phy_address);
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else
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mdio->phy_mask = 0;
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ret = mdiobus_register(mdio);
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if (ret) {
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dev_err(kdev, "failed to register MDIO bus\n");
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return ret;
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}
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if (pd->phy_address >= 0 && pd->phy_address < PHY_MAX_ADDR)
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phydev = mdio->phy_map[pd->phy_address];
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else
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phydev = phy_find_first(mdio);
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if (!phydev) {
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dev_err(kdev, "failed to register PHY device\n");
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mdiobus_unregister(mdio);
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return -ENODEV;
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}
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} else {
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/*
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* MoCA port or no MDIO access.
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* Use fixed PHY to represent the link layer.
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*/
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struct fixed_phy_status fphy_status = {
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.link = 1,
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.speed = pd->phy_speed,
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.duplex = pd->phy_duplex,
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.pause = 0,
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.asym_pause = 0,
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};
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phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL);
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if (!phydev || IS_ERR(phydev)) {
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dev_err(kdev, "failed to register fixed PHY device\n");
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return -ENODEV;
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}
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}
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priv->phydev = phydev;
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priv->phy_interface = pd->phy_interface;
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return 0;
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}
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static int bcmgenet_mii_bus_init(struct bcmgenet_priv *priv)
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{
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struct device_node *dn = priv->pdev->dev.of_node;
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if (dn)
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return bcmgenet_mii_of_init(priv);
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else
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return bcmgenet_mii_pd_init(priv);
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}
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int bcmgenet_mii_init(struct net_device *dev)
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{
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struct bcmgenet_priv *priv = netdev_priv(dev);
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@ -447,7 +529,7 @@ int bcmgenet_mii_init(struct net_device *dev)
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if (ret)
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return ret;
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ret = bcmgenet_mii_of_init(priv);
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ret = bcmgenet_mii_bus_init(priv);
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if (ret)
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goto out_free;
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18
include/linux/platform_data/bcmgenet.h
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18
include/linux/platform_data/bcmgenet.h
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@ -0,0 +1,18 @@
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#ifndef __LINUX_PLATFORM_DATA_BCMGENET_H__
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#define __LINUX_PLATFORM_DATA_BCMGENET_H__
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#include <linux/types.h>
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#include <linux/if_ether.h>
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#include <linux/phy.h>
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struct bcmgenet_platform_data {
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bool mdio_enabled;
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phy_interface_t phy_interface;
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int phy_address;
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int phy_speed;
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int phy_duplex;
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u8 mac_address[ETH_ALEN];
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int genet_version;
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};
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#endif
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