2 * drivers/net/phy/mdio_bus.c
8 * Copyright (c) 2004 Freescale Semiconductor, Inc.
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
16 #include <linux/kernel.h>
17 #include <linux/string.h>
18 #include <linux/errno.h>
19 #include <linux/unistd.h>
20 #include <linux/slab.h>
21 #include <linux/interrupt.h>
22 #include <linux/init.h>
23 #include <linux/delay.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/skbuff.h>
27 #include <linux/spinlock.h>
29 #include <linux/module.h>
30 #include <linux/mii.h>
31 #include <linux/ethtool.h>
32 #include <linux/phy.h>
36 #include <asm/uaccess.h>
40 * description: Called by a bus driver to bring up all the PHYs
41 * on a given bus, and attach them to the bus
43 int mdiobus_register(struct mii_bus *bus)
48 spin_lock_init(&bus->mdio_lock);
50 if (NULL == bus || NULL == bus->name ||
58 for (i = 0; i < PHY_MAX_ADDR; i++) {
59 struct phy_device *phydev;
61 if (bus->phy_mask & (1 << i)) {
62 bus->phy_map[i] = NULL;
66 phydev = get_phy_device(bus, i);
69 return PTR_ERR(phydev);
71 /* There's a PHY at this address
78 * And, we need to register it */
80 phydev->irq = bus->irq[i];
82 phydev->dev.parent = bus->dev;
83 phydev->dev.bus = &mdio_bus_type;
84 snprintf(phydev->dev.bus_id, BUS_ID_SIZE, PHY_ID_FMT, bus->id, i);
88 err = device_register(&phydev->dev);
91 printk(KERN_ERR "phy %d failed to register\n",
95 bus->phy_map[i] = phydev;
98 pr_info("%s: probed\n", bus->name);
102 EXPORT_SYMBOL(mdiobus_register);
104 void mdiobus_unregister(struct mii_bus *bus)
108 for (i = 0; i < PHY_MAX_ADDR; i++) {
109 if (bus->phy_map[i]) {
110 device_unregister(&bus->phy_map[i]->dev);
111 kfree(bus->phy_map[i]);
115 EXPORT_SYMBOL(mdiobus_unregister);
119 * description: Given a PHY device, and a PHY driver, return 1 if
120 * the driver supports the device. Otherwise, return 0
122 static int mdio_bus_match(struct device *dev, struct device_driver *drv)
124 struct phy_device *phydev = to_phy_device(dev);
125 struct phy_driver *phydrv = to_phy_driver(drv);
127 return (phydrv->phy_id == (phydev->phy_id & phydrv->phy_id_mask));
130 /* Suspend and resume. Copied from platform_suspend and
133 static int mdio_bus_suspend(struct device * dev, pm_message_t state)
136 struct device_driver *drv = dev->driver;
138 if (drv && drv->suspend)
139 ret = drv->suspend(dev, state);
144 static int mdio_bus_resume(struct device * dev)
147 struct device_driver *drv = dev->driver;
149 if (drv && drv->resume)
150 ret = drv->resume(dev);
155 struct bus_type mdio_bus_type = {
157 .match = mdio_bus_match,
158 .suspend = mdio_bus_suspend,
159 .resume = mdio_bus_resume,
161 EXPORT_SYMBOL(mdio_bus_type);
163 int __init mdio_bus_init(void)
165 return bus_register(&mdio_bus_type);
168 void mdio_bus_exit(void)
170 bus_unregister(&mdio_bus_type);