OpenWrt – Rev 4
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/*
* Atheros AR71xx built-in ethernet mac driver
*
* Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
*
* Based on Atheros' AG7100 driver
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include "ag71xx.h"
static void ag71xx_phy_link_adjust(struct net_device *dev)
{
struct ag71xx *ag = netdev_priv(dev);
struct phy_device *phydev = ag->phy_dev;
unsigned long flags;
int status_change = 0;
spin_lock_irqsave(&ag->lock, flags);
if (phydev->link) {
if (ag->duplex != phydev->duplex
|| ag->speed != phydev->speed) {
status_change = 1;
}
}
if (phydev->link != ag->link)
status_change = 1;
ag->link = phydev->link;
ag->duplex = phydev->duplex;
ag->speed = phydev->speed;
if (status_change)
ag71xx_link_adjust(ag);
spin_unlock_irqrestore(&ag->lock, flags);
}
void ag71xx_phy_start(struct ag71xx *ag)
{
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
if (ag->phy_dev) {
phy_start(ag->phy_dev);
} else if (pdata->mii_bus_dev && pdata->switch_data) {
ag71xx_ar7240_start(ag);
} else {
ag->link = 1;
ag71xx_link_adjust(ag);
}
}
void ag71xx_phy_stop(struct ag71xx *ag)
{
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
unsigned long flags;
if (ag->phy_dev)
phy_stop(ag->phy_dev);
else if (pdata->mii_bus_dev && pdata->switch_data)
ag71xx_ar7240_stop(ag);
spin_lock_irqsave(&ag->lock, flags);
if (ag->link) {
ag->link = 0;
ag71xx_link_adjust(ag);
}
spin_unlock_irqrestore(&ag->lock, flags);
}
static int ag71xx_phy_connect_fixed(struct ag71xx *ag)
{
struct device *dev = &ag->pdev->dev;
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
int ret = 0;
/* use fixed settings */
switch (pdata->speed) {
case SPEED_10:
case SPEED_100:
case SPEED_1000:
break;
default:
dev_err(dev, "invalid speed specified\n");
ret = -EINVAL;
break;
}
dev_dbg(dev, "using fixed link parameters\n");
ag->duplex = pdata->duplex;
ag->speed = pdata->speed;
return ret;
}
static int ag71xx_phy_connect_multi(struct ag71xx *ag)
{
struct device *dev = &ag->pdev->dev;
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
struct phy_device *phydev = NULL;
int phy_addr;
int ret = 0;
for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
if (!(pdata->phy_mask & (1 << phy_addr)))
continue;
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
if (ag->mii_bus->phy_map[phy_addr] == NULL)
continue;
DBG("%s: PHY found at %s, uid=%08x\n",
dev_name(dev),
dev_name(&ag->mii_bus->phy_map[phy_addr]->dev),
ag->mii_bus->phy_map[phy_addr]->phy_id);
if (phydev == NULL)
phydev = ag->mii_bus->phy_map[phy_addr];
#else
if (ag->mii_bus->mdio_map[phy_addr] == NULL)
continue;
DBG("%s: PHY found at %s, uid=%08x\n",
dev_name(dev),
dev_name(&ag->mii_bus->mdio_map[phy_addr]->dev),
ag->mii_bus->mdio_map[phy_addr]->phy_id);
if (phydev == NULL)
phydev = mdiobus_get_phy(ag->mii_bus, phy_addr);
#endif
}
if (!phydev) {
dev_err(dev, "no PHY found with phy_mask=%08x\n",
pdata->phy_mask);
return -ENODEV;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
ag->phy_dev = phy_connect(ag->dev, dev_name(&phydev->dev),
#else
ag->phy_dev = phy_connect(ag->dev, phydev_name(phydev),
#endif
&ag71xx_phy_link_adjust,
pdata->phy_if_mode);
if (IS_ERR(ag->phy_dev)) {
dev_err(dev, "could not connect to PHY at %s\n",
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
dev_name(&phydev->dev));
#else
phydev_name(phydev));
#endif
return PTR_ERR(ag->phy_dev);
}
/* mask with MAC supported features */
if (pdata->has_gbit)
phydev->supported &= PHY_GBIT_FEATURES;
else
phydev->supported &= PHY_BASIC_FEATURES;
phydev->advertising = phydev->supported;
dev_info(dev, "connected to PHY at %s [uid=%08x, driver=%s]\n",
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
dev_name(&phydev->dev),
#else
phydev_name(phydev),
#endif
phydev->phy_id, phydev->drv->name);
ag->link = 0;
ag->speed = 0;
ag->duplex = -1;
return ret;
}
static int dev_is_class(struct device *dev, void *class)
{
if (dev->class != NULL && !strcmp(dev->class->name, class))
return 1;
return 0;
}
static struct device *dev_find_class(struct device *parent, char *class)
{
if (dev_is_class(parent, class)) {
get_device(parent);
return parent;
}
return device_find_child(parent, class, dev_is_class);
}
static struct mii_bus *dev_to_mii_bus(struct device *dev)
{
struct device *d;
d = dev_find_class(dev, "mdio_bus");
if (d != NULL) {
struct mii_bus *bus;
bus = to_mii_bus(d);
put_device(d);
return bus;
}
return NULL;
}
int ag71xx_phy_connect(struct ag71xx *ag)
{
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
if (pdata->mii_bus_dev == NULL ||
pdata->mii_bus_dev->bus == NULL )
return ag71xx_phy_connect_fixed(ag);
ag->mii_bus = dev_to_mii_bus(pdata->mii_bus_dev);
if (ag->mii_bus == NULL) {
dev_err(&ag->pdev->dev, "unable to find MII bus on device '%s'\n",
dev_name(pdata->mii_bus_dev));
return -ENODEV;
}
/* Reset the mdio bus explicitly */
if (ag->mii_bus->reset) {
mutex_lock(&ag->mii_bus->mdio_lock);
ag->mii_bus->reset(ag->mii_bus);
mutex_unlock(&ag->mii_bus->mdio_lock);
}
if (pdata->switch_data)
return ag71xx_ar7240_init(ag);
if (pdata->phy_mask)
return ag71xx_phy_connect_multi(ag);
return ag71xx_phy_connect_fixed(ag);
}
void ag71xx_phy_disconnect(struct ag71xx *ag)
{
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
if (pdata->switch_data)
ag71xx_ar7240_cleanup(ag);
else if (ag->phy_dev)
phy_disconnect(ag->phy_dev);
}