diff options
Diffstat (limited to 'target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_phy.c')
| -rw-r--r-- | target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_phy.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_phy.c b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_phy.c new file mode 100644 index 000000000..ebdbc5b9a --- /dev/null +++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_phy.c @@ -0,0 +1,235 @@ +/* + * 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->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->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 net_device *dev = ag->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: + netdev_err(dev, "invalid speed specified\n"); + ret = -EINVAL; + break; + } + + netdev_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 net_device *dev = ag->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 (ag->mii_bus->phy_map[phy_addr] == NULL) + continue; + + DBG("%s: PHY found at %s, uid=%08x\n", + dev->name, + 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]; + } + + if (!phydev) { + netdev_err(dev, "no PHY found with phy_mask=%08x\n", + pdata->phy_mask); + return -ENODEV; + } + + ag->phy_dev = phy_connect(dev, dev_name(&phydev->dev), + &ag71xx_phy_link_adjust, 0, + pdata->phy_if_mode); + + if (IS_ERR(ag->phy_dev)) { + netdev_err(dev, "could not connect to PHY at %s\n", + dev_name(&phydev->dev)); + 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; + + netdev_info(dev, "connected to PHY at %s [uid=%08x, driver=%s]\n", + dev_name(&phydev->dev), 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 __devinit 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) { + netdev_err(ag->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); +} |