zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/of/of_net.c b/ap/os/linux/linux-3.4.x/drivers/of/of_net.c
new file mode 100644
index 0000000..ffab033
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/of/of_net.c
@@ -0,0 +1,94 @@
+/*
+ * 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);