2005-07-30 23:31:23 +00:00
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/*
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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/kernel.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/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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2007-03-06 10:41:48 +00:00
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/**
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* mdiobus_register - bring up all the PHYs on a given bus and attach them to bus
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* @bus: target mii_bus
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2005-08-24 23:46:21 +00:00
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*
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2007-03-06 10:41:48 +00:00
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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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* Returns 0 on success or < 0 on error.
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2005-08-24 23:46:21 +00:00
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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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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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2008-02-20 00:13:53 +00:00
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mutex_init(&bus->mdio_lock);
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2005-08-24 23:46:21 +00:00
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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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2008-08-26 11:08:46 +00:00
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bus->phy_map[i] = NULL;
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if ((bus->phy_mask & (1 << i)) == 0) {
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struct phy_device *phydev;
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2005-08-24 23:46:21 +00:00
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2008-08-26 11:08:46 +00:00
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phydev = mdiobus_scan(bus, i);
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if (IS_ERR(phydev))
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err = PTR_ERR(phydev);
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2006-05-10 16:12:57 +00:00
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}
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2005-08-24 23:46:21 +00:00
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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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2007-12-04 13:17:33 +00:00
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if (bus->phy_map[i])
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2005-08-24 23:46:21 +00:00
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device_unregister(&bus->phy_map[i]->dev);
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}
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}
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EXPORT_SYMBOL(mdiobus_unregister);
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2008-08-26 11:08:46 +00:00
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struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
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{
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struct phy_device *phydev;
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int err;
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phydev = get_phy_device(bus, addr);
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if (IS_ERR(phydev) || phydev == NULL)
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return 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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phydev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL;
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2008-10-01 15:41:33 +00:00
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phydev->dev.parent = bus->parent;
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2008-08-26 11:08:46 +00:00
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phydev->dev.bus = &mdio_bus_type;
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snprintf(phydev->dev.bus_id, BUS_ID_SIZE, PHY_ID_FMT, bus->id, addr);
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phydev->bus = bus;
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/* Run all of the fixups for this PHY */
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phy_scan_fixups(phydev);
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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", addr);
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phy_device_free(phydev);
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phydev = NULL;
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}
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bus->phy_map[addr] = phydev;
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return phydev;
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}
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EXPORT_SYMBOL(mdiobus_scan);
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2007-03-06 10:41:48 +00:00
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/**
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* mdio_bus_match - determine if given PHY driver supports the given PHY device
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* @dev: target PHY device
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* @drv: given PHY driver
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2005-07-30 23:31:23 +00:00
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*
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2007-03-06 10:41:48 +00:00
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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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2005-07-30 23:31:23 +00:00
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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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2007-06-28 18:26:06 +00:00
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return ((phydrv->phy_id & phydrv->phy_id_mask) ==
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(phydev->phy_id & phydrv->phy_id_mask));
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2005-07-30 23:31:23 +00:00
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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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2005-09-03 22:56:56 +00:00
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static int mdio_bus_suspend(struct device * dev, pm_message_t state)
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2005-07-30 23:31:23 +00:00
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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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2005-10-28 16:52:56 +00:00
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if (drv && drv->suspend)
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ret = drv->suspend(dev, state);
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2005-07-30 23:31:23 +00:00
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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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2005-10-28 16:52:56 +00:00
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if (drv && drv->resume)
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ret = drv->resume(dev);
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2005-07-30 23:31:23 +00:00
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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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2006-08-15 06:00:29 +00:00
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EXPORT_SYMBOL(mdio_bus_type);
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2005-07-30 23:31:23 +00:00
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2005-08-11 06:07:25 +00:00
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int __init mdio_bus_init(void)
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2005-07-30 23:31:23 +00:00
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{
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return bus_register(&mdio_bus_type);
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}
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2005-09-03 21:05:06 +00:00
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void mdio_bus_exit(void)
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2005-08-24 23:46:21 +00:00
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{
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bus_unregister(&mdio_bus_type);
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}
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