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linux-next/drivers/net/phy/mdio_bus.c
Russell King 9480e307cd [PATCH] DRIVER MODEL: Get rid of the obsolete tri-level suspend/resume callbacks
In PM v1, all devices were called at SUSPEND_DISABLE level.  Then
all devices were called at SUSPEND_SAVE_STATE level, and finally
SUSPEND_POWER_DOWN level.  However, with PM v2, to maintain
compatibility for platform devices, I arranged for the PM v2
suspend/resume callbacks to call the old PM v1 suspend/resume
callbacks three times with each level in order so that existing
drivers continued to work.

Since this is obsolete infrastructure which is no longer necessary,
we can remove it.  Here's an (untested) patch to do exactly that.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-10-28 09:52:56 -07:00

169 lines
3.4 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, pm_message_t state)
{
int ret = 0;
struct device_driver *drv = dev->driver;
if (drv && drv->suspend)
ret = drv->suspend(dev, state);
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);
return ret;
}
struct bus_type mdio_bus_type = {
.name = "mdio_bus",
.match = mdio_bus_match,
.suspend = mdio_bus_suspend,
.resume = mdio_bus_resume,
};
int __init mdio_bus_init(void)
{
return bus_register(&mdio_bus_type);
}
void mdio_bus_exit(void)
{
bus_unregister(&mdio_bus_type);
}