67c4f3fa25
Includes fixes for problems noted by Adrian Bunk, Andrew Morton, and one other person lost in the annals of history (and email folders).
173 lines
3.7 KiB
C
173 lines
3.7 KiB
C
/*
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* drivers/net/phy/mdio_bus.c
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*
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* MDIO Bus interface
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*
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* Author: Andy Fleming
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*
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* Copyright (c) 2004 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/unistd.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/spinlock.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/version.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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/* mdiobus_register
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*
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* description: Called by a bus driver to bring up all the PHYs
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* on a given bus, and attach them to the bus
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*/
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int mdiobus_register(struct mii_bus *bus)
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{
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int i;
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int err = 0;
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spin_lock_init(&bus->mdio_lock);
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if (NULL == bus || NULL == bus->name ||
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NULL == bus->read ||
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NULL == bus->write)
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return -EINVAL;
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if (bus->reset)
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bus->reset(bus);
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for (i = 0; i < PHY_MAX_ADDR; i++) {
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struct phy_device *phydev;
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phydev = get_phy_device(bus, i);
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if (IS_ERR(phydev))
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return PTR_ERR(phydev);
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/* There's a PHY at this address
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* We need to set:
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* 1) IRQ
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* 2) bus_id
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* 3) parent
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* 4) bus
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* 5) mii_bus
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* And, we need to register it */
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if (phydev) {
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phydev->irq = bus->irq[i];
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phydev->dev.parent = bus->dev;
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phydev->dev.bus = &mdio_bus_type;
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sprintf(phydev->dev.bus_id, "phy%d:%d", bus->id, i);
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phydev->bus = bus;
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err = device_register(&phydev->dev);
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if (err)
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printk(KERN_ERR "phy %d failed to register\n",
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i);
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}
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bus->phy_map[i] = phydev;
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}
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pr_info("%s: probed\n", bus->name);
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return err;
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}
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EXPORT_SYMBOL(mdiobus_register);
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void mdiobus_unregister(struct mii_bus *bus)
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{
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int i;
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for (i = 0; i < PHY_MAX_ADDR; i++) {
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if (bus->phy_map[i]) {
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device_unregister(&bus->phy_map[i]->dev);
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kfree(bus->phy_map[i]);
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}
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}
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}
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EXPORT_SYMBOL(mdiobus_unregister);
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/* mdio_bus_match
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*
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* description: Given a PHY device, and a PHY driver, return 1 if
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* the driver supports the device. Otherwise, return 0
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*/
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static int mdio_bus_match(struct device *dev, struct device_driver *drv)
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{
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struct phy_device *phydev = to_phy_device(dev);
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struct phy_driver *phydrv = to_phy_driver(drv);
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return (phydrv->phy_id == (phydev->phy_id & phydrv->phy_id_mask));
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}
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/* Suspend and resume. Copied from platform_suspend and
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* platform_resume
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*/
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static int mdio_bus_suspend(struct device * dev, u32 state)
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{
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int ret = 0;
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struct device_driver *drv = dev->driver;
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if (drv && drv->suspend) {
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ret = drv->suspend(dev, state, SUSPEND_DISABLE);
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if (ret == 0)
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ret = drv->suspend(dev, state, SUSPEND_SAVE_STATE);
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if (ret == 0)
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ret = drv->suspend(dev, state, SUSPEND_POWER_DOWN);
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}
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return ret;
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}
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static int mdio_bus_resume(struct device * dev)
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{
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int ret = 0;
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struct device_driver *drv = dev->driver;
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if (drv && drv->resume) {
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ret = drv->resume(dev, RESUME_POWER_ON);
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if (ret == 0)
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ret = drv->resume(dev, RESUME_RESTORE_STATE);
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if (ret == 0)
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ret = drv->resume(dev, RESUME_ENABLE);
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}
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return ret;
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}
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struct bus_type mdio_bus_type = {
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.name = "mdio_bus",
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.match = mdio_bus_match,
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.suspend = mdio_bus_suspend,
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.resume = mdio_bus_resume,
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};
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int __init mdio_bus_init(void)
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{
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return bus_register(&mdio_bus_type);
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}
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