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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 <common.h>
#include <net.h>
#include <of_net.h>
#include <linux/phy.h>
/**
* It maps 'enum phy_interface_t' found in include/linux/phy.h
* into the device tree binding of 'phy-mode', so that Ethernet
* device driver can get phy interface from device tree.
*/
static const char *phy_modes[] = {
[PHY_INTERFACE_MODE_NA] = "",
[PHY_INTERFACE_MODE_INTERNAL] = "internal",
[PHY_INTERFACE_MODE_MII] = "mii",
[PHY_INTERFACE_MODE_GMII] = "gmii",
[PHY_INTERFACE_MODE_SGMII] = "sgmii",
[PHY_INTERFACE_MODE_TBI] = "tbi",
[PHY_INTERFACE_MODE_REVMII] = "rev-mii",
[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",
[PHY_INTERFACE_MODE_XGMII] = "xgmii",
[PHY_INTERFACE_MODE_MOCA] = "moca",
[PHY_INTERFACE_MODE_QSGMII] = "qsgmii",
[PHY_INTERFACE_MODE_TRGMII] = "trgmii",
[PHY_INTERFACE_MODE_1000BASEX] = "1000base-x",
[PHY_INTERFACE_MODE_2500BASEX] = "2500base-x",
[PHY_INTERFACE_MODE_RXAUI] = "rxaui",
[PHY_INTERFACE_MODE_XAUI] = "xaui",
[PHY_INTERFACE_MODE_10GKR] = "10gbase-kr",
};
/**
* of_get_phy_mode - Get phy mode for given device_node
* @np: Pointer to the given device_node
*
* The function gets phy interface string from property 'phy-mode',
* and return its index in phy_modes table, or errno in error case.
*/
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)
err = of_property_read_string(np, "phy-connection-type", &pm);
if (err < 0)
return err;
for (i = 0; i < ARRAY_SIZE(phy_modes); i++)
if (!strcmp(pm, phy_modes[i]))
return i;
return -ENODEV;
}
EXPORT_SYMBOL_GPL(of_get_phy_mode);
/**
* Search the device tree for the best MAC address to use. 'mac-address' is
* checked first, because that is supposed to contain to "most recent" MAC
* address. If that isn't set, then 'local-mac-address' is checked next,
* because that is the default address. If that isn't set, then the obsolete
* 'address' is checked, just in case we're using an old device tree.
*
* Note that the 'address' property is supposed to contain a virtual address of
* the register set, but some DTS files have redefined that property to be the
* MAC address.
*
* All-zero MAC addresses are rejected, because those could be properties that
* exist in the device tree, but were not set by U-Boot. For example, the
* DTS could define 'mac-address' and 'local-mac-address', with zero MAC
* addresses. Some older U-Boots only initialized 'local-mac-address'. In
* this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
* but is all zeros.
*/
const void *of_get_mac_address(struct device_node *np)
{
const void *p;
int len, i;
const char *str[] = { "mac-address", "local-mac-address", "address" };
for (i = 0; i < ARRAY_SIZE(str); i++) {
p = of_get_property(np, str[i], &len);
if (p && (len == 6) && is_valid_ether_addr(p))
return p;
}
return NULL;
}
EXPORT_SYMBOL(of_get_mac_address);
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