linux/drivers/net/phy/mdio_bus.c
Vitaly Bordug 11b0bacd71 [PATCH] PAL: Support of the fixed PHY
This makes it possible for HW PHY-less boards to utilize PAL goodies.  Generic
routines to connect to fixed PHY are provided, as well as ability to specify
software callback that fills up link, speed, etc.  information into PHY
descriptor (the latter feature not tested so far).

Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-08-19 17:44:31 -04:00

172 lines
3.5 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/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/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;
if (bus->phy_mask & (1 << i)) {
bus->phy_map[i] = NULL;
continue;
}
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;
snprintf(phydev->dev.bus_id, BUS_ID_SIZE, PHY_ID_FMT, 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,
};
EXPORT_SYMBOL(mdio_bus_type);
int __init mdio_bus_init(void)
{
return bus_register(&mdio_bus_type);
}
void mdio_bus_exit(void)
{
bus_unregister(&mdio_bus_type);
}