[PATCH] PHY Layer fixup

This patch adds back the code that was taken out, thus re-enabling:

* The PHY Layer to initialize without crashing
* Drivers to actually connect to PHYs
* The entire PHY Control Layer

This patch is used by the gianfar driver, and other drivers which are in
development.

Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 78 insertions, 1 deletions

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index d5a05be28818..41f62c0c5fcb 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -38,6 +38,80 @@
 #include <asm/irq.h>
 #include <asm/uaccess.h>
 
+/* mdiobus_register 
+ *
+ * description: Called by a bus driver to bring up all the PHYs
+ *   on a given bus, and attach them to the bus
+ */
+int mdiobus_register(struct mii_bus *bus)
+{
+        int i;
+        int err = 0;
+
+        spin_lock_init(&bus->mdio_lock);
+
+        if (NULL == bus || NULL == bus->name ||
+                        NULL == bus->read ||
+                        NULL == bus->write)
+                return -EINVAL;
+
+        if (bus->reset)
+                bus->reset(bus);
+
+        for (i = 0; i < PHY_MAX_ADDR; i++) {
+                struct phy_device *phydev;
+
+                phydev = get_phy_device(bus, i);
+
+                if (IS_ERR(phydev))
+                        return PTR_ERR(phydev);
+
+                /* There's a PHY at this address
+                 * We need to set:
+                 * 1) IRQ
+                 * 2) bus_id
+                 * 3) parent
+                 * 4) bus
+                 * 5) mii_bus
+                 * And, we need to register it */
+                if (phydev) {
+                        phydev->irq = bus->irq[i];
+
+                        phydev->dev.parent = bus->dev;
+                        phydev->dev.bus = &mdio_bus_type;
+                        sprintf(phydev->dev.bus_id, "phy%d:%d", bus->id, i);
+
+                        phydev->bus = bus;
+
+                        err = device_register(&phydev->dev);
+
+                        if (err)
+                                printk(KERN_ERR "phy %d failed to register\n",
+                                                i);
+                }
+
+                bus->phy_map[i] = phydev;
+        }
+
+        pr_info("%s: probed\n", bus->name);
+
+        return err;
+}
+EXPORT_SYMBOL(mdiobus_register);
+
+void mdiobus_unregister(struct mii_bus *bus)
+{
+        int i;
+
+        for (i = 0; i < PHY_MAX_ADDR; i++) {
+                if (bus->phy_map[i]) {
+                        device_unregister(&bus->phy_map[i]->dev);
+                        kfree(bus->phy_map[i]);
+                }
+        }
+}
+EXPORT_SYMBOL(mdiobus_unregister);
+
 /* mdio_bus_match
  *
  * description: Given a PHY device, and a PHY driver, return 1 if
@@ -96,4 +170,7 @@ int __init mdio_bus_init(void)
         return bus_register(&mdio_bus_type);
 }
 
-
+void __exit mdio_bus_exit(void)
+{
+        bus_unregister(&mdio_bus_type);
+}