zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/of/of_mdio.c b/ap/os/linux/linux-3.4.x/drivers/of/of_mdio.c
new file mode 100644
index 0000000..483c0ad
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/of/of_mdio.c
@@ -0,0 +1,190 @@
+/*
+ * OF helpers for the MDIO (Ethernet PHY) API
+ *
+ * Copyright (c) 2009 Secret Lab Technologies, Ltd.
+ *
+ * This file is released under the GPLv2
+ *
+ * This file provides helper functions for extracting PHY device information
+ * out of the OpenFirmware device tree and using it to populate an mii_bus.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/err.h>
+#include <linux/phy.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_mdio.h>
+#include <linux/module.h>
+
+MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
+MODULE_LICENSE("GPL");
+
+/**
+ * of_mdiobus_register - Register mii_bus and create PHYs from the device tree
+ * @mdio: pointer to mii_bus structure
+ * @np: pointer to device_node of MDIO bus.
+ *
+ * This function registers the mii_bus structure and registers a phy_device
+ * for each child node of @np.
+ */
+int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
+{
+ struct phy_device *phy;
+ struct device_node *child;
+ int rc, i;
+
+ /* Mask out all PHYs from auto probing. Instead the PHYs listed in
+ * the device tree are populated after the bus has been registered */
+ mdio->phy_mask = ~0;
+
+ /* Clear all the IRQ properties */
+ if (mdio->irq)
+ for (i=0; i<PHY_MAX_ADDR; i++)
+ mdio->irq[i] = PHY_POLL;
+
+ /* Register the MDIO bus */
+ rc = mdiobus_register(mdio);
+ if (rc)
+ return rc;
+
+ /* Loop over the child nodes and register a phy_device for each one */
+ for_each_child_of_node(np, child) {
+ const __be32 *paddr;
+ u32 addr;
+ int len;
+
+ /* A PHY must have a reg property in the range [0-31] */
+ paddr = of_get_property(child, "reg", &len);
+ if (!paddr || len < sizeof(*paddr)) {
+ dev_err(&mdio->dev, "%s has invalid PHY address\n",
+ child->full_name);
+ continue;
+ }
+
+ addr = be32_to_cpup(paddr);
+ if (addr >= 32) {
+ dev_err(&mdio->dev, "%s PHY address %i is too large\n",
+ child->full_name, addr);
+ continue;
+ }
+
+ if (mdio->irq) {
+ mdio->irq[addr] = irq_of_parse_and_map(child, 0);
+ if (!mdio->irq[addr])
+ mdio->irq[addr] = PHY_POLL;
+ }
+
+ phy = get_phy_device(mdio, addr);
+ if (!phy || IS_ERR(phy)) {
+ dev_err(&mdio->dev, "error probing PHY at address %i\n",
+ addr);
+ continue;
+ }
+
+ /* Associate the OF node with the device structure so it
+ * can be looked up later */
+ of_node_get(child);
+ phy->dev.of_node = child;
+
+ /* All data is now stored in the phy struct; register it */
+ rc = phy_device_register(phy);
+ if (rc) {
+ phy_device_free(phy);
+ of_node_put(child);
+ continue;
+ }
+
+ dev_dbg(&mdio->dev, "registered phy %s at address %i\n",
+ child->name, addr);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(of_mdiobus_register);
+
+/* Helper function for of_phy_find_device */
+static int of_phy_match(struct device *dev, void *phy_np)
+{
+ return dev->of_node == phy_np;
+}
+
+/**
+ * of_phy_find_device - Give a PHY node, find the phy_device
+ * @phy_np: Pointer to the phy's device tree node
+ *
+ * Returns a pointer to the phy_device.
+ */
+struct phy_device *of_phy_find_device(struct device_node *phy_np)
+{
+ struct device *d;
+ if (!phy_np)
+ return NULL;
+
+ d = bus_find_device(&mdio_bus_type, NULL, phy_np, of_phy_match);
+ return d ? to_phy_device(d) : NULL;
+}
+EXPORT_SYMBOL(of_phy_find_device);
+
+/**
+ * of_phy_connect - Connect to the phy described in the device tree
+ * @dev: pointer to net_device claiming the phy
+ * @phy_np: Pointer to device tree node for the PHY
+ * @hndlr: Link state callback for the network device
+ * @iface: PHY data interface type
+ *
+ * Returns a pointer to the phy_device if successful. NULL otherwise
+ */
+struct phy_device *of_phy_connect(struct net_device *dev,
+ struct device_node *phy_np,
+ void (*hndlr)(struct net_device *), u32 flags,
+ phy_interface_t iface)
+{
+ struct phy_device *phy = of_phy_find_device(phy_np);
+
+ if (!phy)
+ return NULL;
+
+ return phy_connect_direct(dev, phy, hndlr, flags, iface) ? NULL : phy;
+}
+EXPORT_SYMBOL(of_phy_connect);
+
+/**
+ * of_phy_connect_fixed_link - Parse fixed-link property and return a dummy phy
+ * @dev: pointer to net_device claiming the phy
+ * @hndlr: Link state callback for the network device
+ * @iface: PHY data interface type
+ *
+ * This function is a temporary stop-gap and will be removed soon. It is
+ * only to support the fs_enet, ucc_geth and gianfar Ethernet drivers. Do
+ * not call this function from new drivers.
+ */
+struct phy_device *of_phy_connect_fixed_link(struct net_device *dev,
+ void (*hndlr)(struct net_device *),
+ phy_interface_t iface)
+{
+ struct device_node *net_np;
+ char bus_id[MII_BUS_ID_SIZE + 3];
+ struct phy_device *phy;
+ const __be32 *phy_id;
+ int sz;
+
+ if (!dev->dev.parent)
+ return NULL;
+
+ net_np = dev->dev.parent->of_node;
+ if (!net_np)
+ return NULL;
+
+ phy_id = of_get_property(net_np, "fixed-link", &sz);
+ if (!phy_id || sz < sizeof(*phy_id))
+ return NULL;
+
+ sprintf(bus_id, PHY_ID_FMT, "fixed-0", be32_to_cpu(phy_id[0]));
+
+ phy = phy_connect(dev, bus_id, hndlr, 0, iface);
+ return IS_ERR(phy) ? NULL : phy;
+}
+EXPORT_SYMBOL(of_phy_connect_fixed_link);