mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 04:11:49 +00:00
2c8d667a31
For files that were getting these macros via the implicit presence of module.h being everywhere. With contributions from Stephen Rothwell <sfr@canb.auug.org.au>. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
95 lines
3.0 KiB
C
95 lines
3.0 KiB
C
/*
|
|
* 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>
|
|
|
|
/**
|
|
* 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_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",
|
|
};
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
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);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
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);
|