174 lines
3.7 KiB
C
174 lines
3.7 KiB
C
![]() |
/*
|
||
|
* drivers/net/phy/mdio_bus.c
|
||
|
*
|
||
|
* MDIO Bus interface
|
||
|
*
|
||
|
* Author: Andy Fleming
|
||
|
*
|
||
|
* Copyright (c) 2004 Freescale Semiconductor, Inc.
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
* under the terms of the GNU General Public License as published by the
|
||
|
* Free Software Foundation; either version 2 of the License, or (at your
|
||
|
* option) any later version.
|
||
|
*
|
||
|
*/
|
||
|
#include <linux/config.h>
|
||
|
#include <linux/kernel.h>
|
||
|
#include <linux/sched.h>
|
||
|
#include <linux/string.h>
|
||
|
#include <linux/errno.h>
|
||
|
#include <linux/unistd.h>
|
||
|
#include <linux/slab.h>
|
||
|
#include <linux/interrupt.h>
|
||
|
#include <linux/init.h>
|
||
|
#include <linux/delay.h>
|
||
|
#include <linux/netdevice.h>
|
||
|
#include <linux/etherdevice.h>
|
||
|
#include <linux/skbuff.h>
|
||
|
#include <linux/spinlock.h>
|
||
|
#include <linux/mm.h>
|
||
|
#include <linux/module.h>
|
||
|
#include <linux/version.h>
|
||
|
#include <linux/mii.h>
|
||
|
#include <linux/ethtool.h>
|
||
|
#include <linux/phy.h>
|
||
|
|
||
|
#include <asm/io.h>
|
||
|
#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
|
||
|
* the driver supports the device. Otherwise, return 0
|
||
|
*/
|
||
|
static int mdio_bus_match(struct device *dev, struct device_driver *drv)
|
||
|
{
|
||
|
struct phy_device *phydev = to_phy_device(dev);
|
||
|
struct phy_driver *phydrv = to_phy_driver(drv);
|
||
|
|
||
|
return (phydrv->phy_id == (phydev->phy_id & phydrv->phy_id_mask));
|
||
|
}
|
||
|
|
||
|
/* Suspend and resume. Copied from platform_suspend and
|
||
|
* platform_resume
|
||
|
*/
|
||
|
static int mdio_bus_suspend(struct device * dev, u32 state)
|
||
|
{
|
||
|
int ret = 0;
|
||
|
struct device_driver *drv = dev->driver;
|
||
|
|
||
|
if (drv && drv->suspend) {
|
||
|
ret = drv->suspend(dev, state, SUSPEND_DISABLE);
|
||
|
if (ret == 0)
|
||
|
ret = drv->suspend(dev, state, SUSPEND_SAVE_STATE);
|
||
|
if (ret == 0)
|
||
|
ret = drv->suspend(dev, state, SUSPEND_POWER_DOWN);
|
||
|
}
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int mdio_bus_resume(struct device * dev)
|
||
|
{
|
||
|
int ret = 0;
|
||
|
struct device_driver *drv = dev->driver;
|
||
|
|
||
|
if (drv && drv->resume) {
|
||
|
ret = drv->resume(dev, RESUME_POWER_ON);
|
||
|
if (ret == 0)
|
||
|
ret = drv->resume(dev, RESUME_RESTORE_STATE);
|
||
|
if (ret == 0)
|
||
|
ret = drv->resume(dev, RESUME_ENABLE);
|
||
|
}
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
struct bus_type mdio_bus_type = {
|
||
|
.name = "mdio_bus",
|
||
|
.match = mdio_bus_match,
|
||
|
.suspend = mdio_bus_suspend,
|
||
|
.resume = mdio_bus_resume,
|
||
|
};
|
||
|
|
||
|
static int __init mdio_bus_init(void)
|
||
|
{
|
||
|
return bus_register(&mdio_bus_type);
|
||
|
}
|
||
|
|
||
|
subsys_initcall(mdio_bus_init);
|