4  * MDIO Bus interface
42  * If non-zero, then bus->priv is points to that memory.
44  * Description: called by a bus driver to allocate an mii_bus
49 	struct mii_bus *bus;  in mdiobus_alloc_size()  local
50 	size_t aligned_size = ALIGN(sizeof(*bus), NETDEV_ALIGN);  in mdiobus_alloc_size()
57 		alloc_size = sizeof(*bus);  in mdiobus_alloc_size()
59 	bus = kzalloc(alloc_size, GFP_KERNEL);  in mdiobus_alloc_size()
60 	if (bus) {  in mdiobus_alloc_size()
61 		bus->state = MDIOBUS_ALLOCATED;  in mdiobus_alloc_size()
63 			bus->priv = (void *)bus + aligned_size;  in mdiobus_alloc_size()
66 	return bus;  in mdiobus_alloc_size()
79 	struct mii_bus *bus = to_mii_bus(d);  in mdiobus_release()  local
80 	BUG_ON(bus->state != MDIOBUS_RELEASED &&  in mdiobus_release()
82 	       bus->state != MDIOBUS_ALLOCATED);  in mdiobus_release()
83 	kfree(bus);  in mdiobus_release()
92  * mdiobus_register - bring up all the PHYs on a given bus and attach them to bus
93  * @bus: target mii_bus
95  * Description: Called by a bus driver to bring up all the PHYs
96  *   on a given bus, and attach them to the bus.
100 int mdiobus_register(struct mii_bus *bus)  in mdiobus_register()  argument
104 	if (NULL == bus || NULL == bus->name ||  in mdiobus_register()
105 			NULL == bus->read ||  in mdiobus_register()
106 			NULL == bus->write)  in mdiobus_register()
109 	BUG_ON(bus->state != MDIOBUS_ALLOCATED &&  in mdiobus_register()
110 	       bus->state != MDIOBUS_UNREGISTERED);  in mdiobus_register()
112 	bus->dev.parent = bus->parent;  in mdiobus_register()
113 	bus->dev.class = &mdio_bus_class;  in mdiobus_register()
114 	bus->dev.groups = NULL;  in mdiobus_register()
115 	dev_set_name(&bus->dev, "%s", bus->id);  in mdiobus_register()
117 	err = device_register(&bus->dev);  in mdiobus_register()
119 		printk(KERN_ERR "mii_bus %s failed to register\n", bus->id);  in mdiobus_register()
123 	mutex_init(&bus->mdio_lock);  in mdiobus_register()
125 	if (bus->reset)  in mdiobus_register()
126 		bus->reset(bus);  in mdiobus_register()
129 		if ((bus->phy_mask & (1 << i)) == 0) {  in mdiobus_register()
132 			phydev = mdiobus_scan(bus, i);  in mdiobus_register()
140 	bus->state = MDIOBUS_REGISTERED;  in mdiobus_register()
141 	pr_info("%s: probed\n", bus->name);  in mdiobus_register()
146 		if (bus->phy_map[i])  in mdiobus_register()
147 			device_unregister(&bus->phy_map[i]->dev);  in mdiobus_register()
149 	device_del(&bus->dev);  in mdiobus_register()
154 void mdiobus_unregister(struct mii_bus *bus)  in mdiobus_unregister()  argument
158 	BUG_ON(bus->state != MDIOBUS_REGISTERED);  in mdiobus_unregister()
159 	bus->state = MDIOBUS_UNREGISTERED;  in mdiobus_unregister()
161 	device_del(&bus->dev);  in mdiobus_unregister()
163 		if (bus->phy_map[i])  in mdiobus_unregister()
164 			device_unregister(&bus->phy_map[i]->dev);  in mdiobus_unregister()
165 		bus->phy_map[i] = NULL;  in mdiobus_unregister()
172  * @bus: mii_bus to free
178 void mdiobus_free(struct mii_bus *bus)  in mdiobus_free()  argument
183 	if (bus->state == MDIOBUS_ALLOCATED) {  in mdiobus_free()
184 		kfree(bus);  in mdiobus_free()
188 	BUG_ON(bus->state != MDIOBUS_UNREGISTERED);  in mdiobus_free()
189 	bus->state = MDIOBUS_RELEASED;  in mdiobus_free()
191 	put_device(&bus->dev);  in mdiobus_free()
195 struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)  in mdiobus_scan()  argument
200 	phydev = get_phy_device(bus, addr);  in mdiobus_scan()
216  * @bus: the mii_bus struct
221  * because the bus read/write functions may wait for an interrupt
224 int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum)  in mdiobus_read()  argument
230 	mutex_lock(&bus->mdio_lock);  in mdiobus_read()
231 	retval = bus->read(bus, addr, regnum);  in mdiobus_read()
232 	mutex_unlock(&bus->mdio_lock);  in mdiobus_read()
240  * @bus: the mii_bus struct
246  * because the bus read/write functions may wait for an interrupt
249 int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val)  in mdiobus_write()  argument
255 	mutex_lock(&bus->mdio_lock);  in mdiobus_write()
256 	err = bus->write(bus, addr, regnum, val);  in mdiobus_write()
257 	mutex_unlock(&bus->mdio_lock);  in mdiobus_write()
304 	 * is the case for devices w/o underlaying pwr. mgmt. aware bus,  in mdio_bus_phy_may_suspend()