of_net.c

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/*
 * OF helpers for network devices.
 *
 * This file is released under the GPLv2
 *
 * Initially copied out of arch/powerpc/kernel/prom_parse.c
 */
#include <linux/etherdevice.h>
#include <linux/kernel.h>
#include <linux/of_net.h>
#include <linux/phy.h>
#include <linux/export.h>

static const char *phy_modes[] = {
    [PHY_INTERFACE_MODE_NA]     = "",
    [PHY_INTERFACE_MODE_MII]    = "mii",
    [PHY_INTERFACE_MODE_GMII]   = "gmii",
    [PHY_INTERFACE_MODE_SGMII]  = "sgmii",
    [PHY_INTERFACE_MODE_TBI]    = "tbi",
    [PHY_INTERFACE_MODE_RMII]   = "rmii",
    [PHY_INTERFACE_MODE_RGMII]  = "rgmii",
    [PHY_INTERFACE_MODE_RGMII_ID]   = "rgmii-id",
    [PHY_INTERFACE_MODE_RGMII_RXID] = "rgmii-rxid",
    [PHY_INTERFACE_MODE_RGMII_TXID] = "rgmii-txid",
    [PHY_INTERFACE_MODE_RTBI]   = "rtbi",
    [PHY_INTERFACE_MODE_SMII]   = "smii",
};

const int of_get_phy_mode(struct device_node *np)
{
    const char *pm;
    int err, i;

    err = of_property_read_string(np, "phy-mode", &pm);
    if (err < 0)
        return err;

    for (i = 0; i < ARRAY_SIZE(phy_modes); i++)
        if (!strcasecmp(pm, phy_modes[i]))
            return i;

    return -ENODEV;
}
EXPORT_SYMBOL_GPL(of_get_phy_mode);

const void *of_get_mac_address(struct device_node *np)
{
    struct property *pp;

    pp = of_find_property(np, "mac-address", NULL);
    if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
        return pp->value;

    pp = of_find_property(np, "local-mac-address", NULL);
    if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
        return pp->value;

    pp = of_find_property(np, "address", NULL);
    if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
        return pp->value;

    return NULL;
}
EXPORT_SYMBOL(of_get_mac_address);